#1:/Atwater B.F. Collection/abf00013 ID. Atwater, B.F. 13 Varved intervals and flood beds high in composite Manila Creek section, Sanpoil River Valley. Rule for scale. Ferry County, Washington. ca. 1985. #1:/Albritton C.C. Collection/acc00018 ID. Albritton, C.C. Jr. 18 Limestone beds of Torcer Formation in syncline along northeast front of Malone Mountains, south of Torcer station. Hudspeth County, Texas. ca. 1949. Figure 11 in U.S. Geological Survey. Professional paper 479. 1965. #1:/Alaska Earthquake March 27, 1964/aeq00001 ID. Alaska Earthquake no. 1ct Alaska Earthquake March 27, 1964. Uplifted sea floor at Cape Cleare on Montague Island in Prince William Sound in the area of the greatest recorded tectonic uplift on land (33 feet). The very gently slopping flat rocky surface with the white coating which lies between the cliffs and the water is about a quarter of a mile wide. The white coating consists of the remains of calcareous marine organisms that were killed by desiccation when the wave-cut surface was lifted above high tide during the earthquake. Figure 11, U.S. Geological Survey Professional Paper 541. See also photo aeq00002. #1:/Alaska Earthquake March 27, 1964/aeq00002 ID. Alaska Earthquake no. 2ct Alaska Earthquake March 27, 1964. Uplifted wave-cut surface at Cape Cleare on Montague Island, showing white coating of desiccated calcareous marine organisms and brown desiccated stipes of "stalks" of kelp. The "stalks" are about 2 feet long. Figure 36, U.S. Geological Survey Professional Paper 541. See also photo aeq00001. #1:/Alaska Earthquake March 27, 1964/aeq00003 ID. Alaska Earthquake no. 3ct Alaska Earthquake March 27, 1964. Hinchinbrook Coast Guard dock, raised above all but the highest tides by regional uplift in Prince William Sound. Land in this area rose about 8 feet during the earthquake. Figure 16 (upper right), U.S. Geological Survey Professional Paper 541. #1:/Alaska Earthquake March 27, 1964/aeq00004 ID. Alaska Earthquake no. 4ct Alaska Earthquake March 27, 1964. The stumps in the foreground are part of an ancient forest on Latouche Island in Prince William Sound that was submerged below sea level and buried in prehistoric times. Tectonic uplift of 9 feet during the earthquake raised these stumps above sea level once again, demonstrating that the area is tectonically restless. #1:/Alaska Earthquake March 27, 1964/aeq00005 ID. Alaska Earthquake no. 5ct Alaska Earthquake March 27, 1964. Muskeg-covered pre-earthquake marine terrace on Middleton Island at an altitude of 110-125 feet. It is one of five uplifted terraces on the island, and a surf-cut rock platform exposed between the base of the sea cliff and the new high tide level is a sixth terrace formed by uplift of about 11 feet in 1964. The white specks are seagulls. Photo was taken near 7-foot tide stage. April 4, 1964. Figure 36, U.S. Geological Survey Professional Paper 543-I; Figure 4-A, Circular 491. #1:/Alaska Earthquake March 27, 1964/aeq00006 ID. Alaska Earthquake no. 6ct Alaska Earthquake March 27, 1964. The amount of tectonic uplift on Glacier Island in Prince William Sound was shown by the upper limit to which algae of the intertidal zone are on this sea cliff before and after the earthquake. The top of the band of green (still living) algae is near present post- earthquake) mean high tide. The top of the band of brown (desiccated) algae marks the approximate position of mean high tide before the earthquake. The difference in height between the top of the bands of living and of desiccated algae (3 feet) is a measure of the amount of tectonic uplift in this area. #1:/Alaska Earthquake March 27, 1964/aeq00007 ID. Alaska Earthquake no. 7ct Alaska Earthquake March 27, 1964. This road, along Women's Bay on Kodiak Island, is in an area that tectonically subsided 5 feet during the earthquake. Since subsidence, the road has been flooded at high tide and subjected to erosion by waves. #1:/Alaska Earthquake March 27, 1964/aeq00008 ID. Alaska Earthquake no. 8ct Alaska Earthquake March 27, 1964. These spruce trees on a gravel spill on Resurrection Bay on the Kenai Peninsula are in an area which tectonically subsided 3 feet during the earthquake. The subsidence dropped the shallow roots of these trees below high tide, where they were killed by repeated inundation in salt water. 1964. Figure 10, U.S. Geological Survey Professional Paper 541; Figure 19, U.S. Geological Survey Professional Paper 543-I. #1:/Alaska Earthquake March 27, 1964/aeq00009 ID. Alaska Earthquake no. 9ct Alaska Earthquake March 27, 1964. The village of Portage, at the head of Turnagain Arm of Cook Inlet, is now flooded at high tide as a result of 6 feet of tectonic subsidence during the earthquake. 1964. #1:/Alaska Earthquake March 27, 1964/aeq00010 ID. Alaska Earthquake no. 10ct Alaska Earthquake March 27, 1964. The Hanning Bay fault was reactivated during the earthquake. Its trace is marked by a ten- to 15-foot high bedrock scarp which trends obliquely across the field of view from the right foreground to the left background. The fault trace lies between the uplifted wave-cut surface that is coated white by desiccated calcareous marine organisms and borders the open ocean and the area of brown sand and silt in the cove. The ground northwest of the fault (on the right) was displaced upward as much as 16 feet with respect to the ground southeast of the fault during the earthquake, but both sides of the fault were uplifted with respect to sea level due to general tectonic uplift of the region. The fault plane dips steeply northwest or is vertical. View is southwest along the Hanning Bay fault scarp on southwest Montague Island in Prince William Sound. #1:/Alaska Earthquake March 27, 1964/aeq00011 ID. Alaska Earthquake no. 11ct Alaska Earthquake March 27, 1964. Hanning Bay fault scarp on Montague Island, looking northwest. Vertical displacement in the foreground, in rock, is about 12 feet. The maximum measured displacement of 14 feet is at the beach ridge near the trees in the background. Figure 8, U.S. Geological Survey Professional Paper 541. #1:/Alaska Earthquake March 27, 1964/aeq00012 ID. Alaska Earthquake no. 12ct Alaska Earthquake March 27, 1964. The zone of fresh earth and landslide at the foot of this hillside on Montague Island marks the southwest trending Patton Bay fault, which was reactivated during the earthquake. The northwest side of this vertical fault (on the left) was displaced upward as much as 8 feet with respect to the southeast side. There was, in addition, 9 feet of associated up warping of the upthrown (northwest) block, so that total vertical displacement across the entire fault zone was 17 feet. The view is northeast. #1:/Alaska Earthquake March 27, 1964/aeq00013 ID. Alaska Earthquake no. 13ct Alaska Earthquake March 27, 1964. View is northeast where the Patton Bay fault strikes out to the sea at the southwest end of Montague Island. The fault offsets the beach at the foot of the cliff where the man in the red jacket is standing near the middle of the photo. The beach gravels drape over the fault. Displacement was vertical and up on the left (the northeast) side of the photo. The fault trace in the cliff lies directly above the man and follows the stream of relatively fine-grained talus in the lower part of the cliff and the straight narrow rill cut in bedrock in the upper part of the cliff. 1964. #1:/Alaska Earthquake March 27, 1964/aeq00014 ID. Alaska Earthquake no. 14ct Alaska Earthquake March 27, 1964. Open fissures formed in bedrock adjacent to the Hanning Bay and Patton Bay faults during the earthquake. The fissures generally trended at high angles to the faults and were as wide as half a foot and as long as a few hundred feet. The fissures shown here opened about 1.5 inches. 1964. #1:/Alaska Earthquake March 27, 1964/aeq00015 ID. Alaska Earthquake no. 15ct Tsunami damage at Seward. The waves came in from the sea via Resurrection Bay in the background. 1964. #1:/Alaska Earthquake March 27, 1964/aeq00016 ID. Alaska Earthquake no. 16ct Alaska Earthquake March 27, 1964. Tsunami damage and high-water line at Seward. The tsunami waves washed the snow from the lower slopes of the hillsides, and the height of the highest wave is marked by the sharp "snow line" on the hillside behind and just above the rooftop at left center. 1964. Figure 4-D, U.S. Geological Survey Circular 491. #1:/Alaska Earthquake March 27, 1964/aeq00017 ID. Alaska Earthquake no. 17ct Alaska Earthquake March 27, 1964. Overall view of downtown Kodiak before the tsunami (upper half) and after (lower half). The waves swept in from the left. #1:/Alaska Earthquake March 27, 1964/aeq00018 ID. Alaska Earthquake no. 18ct Alaska Earthquake March 27, 1964. Tsunami damage along the waterfront at Kodiak. 1964. Cover (lower photo), U.S. Geological Survey Circular 491. #1:/Alaska Earthquake March 27, 1964/aeq00019 ID. Alaska Earthquake no. 19ct Alaska Earthquake March 27, 1964. The 1200 L Street Building in Anchorage, a fourteen-story reinforced concrete apartment building, was severely damaged during the earthquake. One the main exterior piers (white bearing walls without windows) failed at the second floor, exposing the steel reinforced bars within the concrete. The reinforced concrete spandrels (green nonbearing panels under windows) failed mainly by "X" shear-cracking between the piers and horizontal cracking at the floor lines near the corner of the building. Figure 18, U.S. Geological Survey Professional Paper 541. #1:/Alaska Earthquake March 27, 1964/aeq00020 ID. Alaska Earthquake no. 20ct Alaska Earthquake March 27, 1964. The Hillside Apartment Building in Anchorage was severely damaged by the earthquake and has been razed. It was a split-level, five-story building with steel posts and lintels, concrete floor slabs, and unreinforced concrete block walls and partitions. #1:/Alaska Earthquake March 27, 1964/aeq00021 ID. Alaska Earthquake no. 21ct Alaska Earthquake March 27, 1964. Compare the damage sustained by the Hillside Apartment Building and the adjacent three-story wood-frame dwelling with the tall chimney. In general, wood frame buildings in Anchorage sustained little damage from seismic vibration. #1:/Alaska Earthquake March 27, 1964/aeq00022 ID. Alaska Earthquake no. 22ct Alaska Earthquake March 27, 1964. A small, one-story concrete block building situated on thick alluvial fill at Valdez was severely damaged. 1964. #1:/Alaska Earthquake March 27, 1964/aeq00023 ID. Alaska Earthquake no. 23ct Alaska Earthquake March 27, 1964. The J.C. Penney Department Store in Anchorage suffered irreparable damage during the earthquake. Note the horizontal shear-cracking along construction joins in the reinforced concrete walls of which the back and part of the side of the store were constructed. Visible in the background is the northeast corner of the building which collapsed during the earthquake. 1964. Figure 20, U.S. Geological Survey Professional Paper 541. #1:/Alaska Earthquake March 27, 1964/aeq00024 ID. Alaska Earthquake no. 24ct Alaska Earthquake March 27, 1964. The Alaska Sales and Service building in Anchorage, which was under construction, partially collapsed during the earthquake. The building was constructed of pre-stressed concrete roof T's which rested on pre-cast reinforced concrete T-columns, and it had pre-cast reinforced concrete walls. Partial collapse followed failure of many of the connections between the roof T's, columns, and walls. Figure 19, U.S. Geological Survey Professional Paper 541; Figure 18-D, U.S. Geological Survey Circular 491. #1:/Alaska Earthquake March 27, 1964/aeq00025 ID. Alaska Earthquake no. 25ct Alaska Earthquake March 27, 1964. The Fifth Avenue Chrysler Center in Anchorage was constructed of pre-cast, pre-stressed concrete roof T's which rested on concrete block walls in most parts of the building. However, in the showroom area the roof T's rested on reinforced concrete columns. This portion of the building completely collapsed, dropping the roof T's onto the automobiles below. 1964. #1:/Alaska Earthquake March 27, 1964/aeq00026 ID. Alaska Earthquake no. 26ct Alaska Earthquake March 27, 1964. The Four Seasons Apartments in Anchorage was a six-story lift-slab reinforced concrete building which cracked to the ground during the earthquake. The building was under construction, but structurally completed, at the time of the earthquake. The main shear- resistant structural elements of the building, a poured-in-place reinforced concrete stairwell and a combined elevator core and stairwell, fractured at the first floor, toppled over, and came to rest on top of the ruble of all six floors and the roof. 1964. #1:/Alaska Earthquake March 27, 1964/aeq00027 ID. Alaska Earthquake no. 27ct Alaska Earthquake March 27, 1964. The control tower at Anchorage International Airport fell to the ground during the earthquake. It was a split-level structure that was seven stories high on one side and built of reinforced concrete. #1:/Alaska Earthquake March 27, 1964/aeq00028 ID. Alaska Earthquake no. 28ct Alaska Earthquake March 27, 1964. Twentymile River Bridge near Turnagain Arm on Cook Inlet. The bridge fell into the river, and some of the wood piles were driven through the reinforced concrete deck. The adjacent steel railroad bridge survived with only minor damage. Both bridges were founded on thick deposits of soft alluvium and tidal flat mud and were subjected to severe seismic vibration. Figure 30, U.S. Geological Survey Professional Paper 541. #1:/Alaska Earthquake March 27, 1964/aeq00029 ID. Alaska Earthquake no. 29ct Alaska Earthquake March 27, 1964. This steel-girder highway bridge collapsed when the steel piling upon which it rested snapped during the earthquake. The piling consisted of used railroad tracks. The bridge rested on thick water- saturated alluvium in the Copper River Delta. #1:/Alaska Earthquake March 27, 1964/aeq00030 ID. Alaska Earthquake no. 30ct Alaska Earthquake March 27, 1964. One span of the Million Dollar truss bridge of the former Copper River and Northwestern Railroad was dropped into the Copper River by the earthquake, and the other truss spans were shifted on their piers. Figure 29, U.S. Geological Survey Professional Paper 541. #1:/Alaska Earthquake March 27, 1964/aeq00031 ID. Alaska Earthquake no. 31ct Alaska Earthquake March 27, 1964. Damage at the piers of the Million Dollar truss bridge caused by movement of the truss spans during the earthquake. Note the bent base plates, the sheared 2-inch diameter bolts, and the overturned rocker bars. #1:/Alaska Earthquake March 27, 1964/aeq00032 ID. Alaska Earthquake no. 32ct Alaska Earthquake March 27, 1964. The earthquake shifted the steel trusses of the Copper River and Northwestern Railroad bridge near Round Island from 1 to 2 feet. This view shows one of the displaced trusses, which pounded against an adjacent steel girder span. The girder span was moved to the right, its concrete pedestal was rotated, and the girder span almost fell into the river. Note the shortening indicated by buckling of the guard rail. #1:/Alaska Earthquake March 27, 1964/aeq00033 ID. Alaska Earthquake no. 33ct Alaska Earthquake March 27, 1964. A series of dents were produced by a falling pebble that was intermittently caught between the railroad bridge and its abutment as they pounded together during the earthquake. #1:/Alaska Earthquake March 27, 1964/aeq00034 ID. Alaska Earthquake no. 34ct Alaska Earthquake March 27, 1964. The earthquake produced marginal pressure ridges and cracks in the ice of small lakes. This example is on the Kenai Peninsula. 1964. #1:/Alaska Earthquake March 27, 1964/aeq00035 ID. Alaska Earthquake no. 35ct Alaska Earthquake March 27, 1964. Pressure ridge formed on a small Kenai Peninsula lake during the earthquake. #1:/Alaska Earthquake March 27, 1964/aeq00036 ID. Alaska Earthquake no. 36ct Alaska Earthquake March 27, 1964. Fragmented ice on Skilak Lake on the Kenai Lowland. The intense local fragmentation here may have been produced by an underwater landslide. Figure 5-D, U.S. Geological Survey Circular 491. #1:/Alaska Earthquake March 27, 1964/aeq00037 ID. Alaska Earthquake no. 37ct Alaska Earthquake March 27, 1964. Chugach Mountains near the epicenter, showing a small snow slip in the center foreground that probably slid during the earthquake. Such features were, in general, not numerous, and the earthquake apparently did not shake down very much of the snowpack that existed at the time of the earthquake. #1:/Alaska Earthquake March 27, 1964/aeq00038 ID. Alaska Earthquake no. 38ct Alaska Earthquake March 27, 1964. At many places along the mountain front bordering Turnagain Arm, earthquake-triggered avalanches buried the Seward Highway and the main line of The Alaska Railroad. The railroad is on top of the embankment at the foot of the mountain. The highway is at the foot of the embankment, at the edge of the mud flats. #1:/Alaska Earthquake March 27, 1964/aeq00039 ID. Alaska Earthquake no. 39ct Alaska Earthquake March 27, 1964. The earthquake precipitated some large rock slides in the Chugach Mountains. The debris from this one, which fell on Sherman Glacier, covered about 2 square miles. It originated on the highest mountain in right background. 1964. #1:/Alaska Earthquake March 27, 1964/aeq00040 ID. Alaska Earthquake no. 40ct Alaska Earthquake March 27, 1964. A series of earthquake-triggered landslides in glacial deposits disrupted almost a mile of The Alaska Railroad main line at Potter Hill near Anchorage. Figure 26, U.S. Geological Survey Professional Paper 541; Figure 4-B, U.S. Geological Survey Circular 491. #1:/Alaska Earthquake March 27, 1964/aeq00041 ID. Alaska Earthquake no. 41ct Alaska Earthquake March 27, 1964. The Turnagain Heights landslide in Anchorage occurred along a steep bluff fronting Knik Arm on Cook Inlet. Its length, which is parallel to the bluff, was about 1.5 miles; its width was about 1/4 to 1/2 mile. Many of the finer homes of the city were reduced to rubble by this landslide. Failure here and in the L Street, Fourth Avenue, and Government Hill landslides in Anchorage occurred on horizontal or near horizontal slip surfaces in the Bootlegger Cove Clay, a marine silt of Pleistocene age. #1:/Alaska Earthquake March 27, 1964/aeq00042 ID. Alaska Earthquake no. 42ct Alaska Earthquake March 27, 1964. Damaged homes at the Turnagain Heights landslide area in Anchorage. Cover (middle photo), U.S. Geological Survey Circular 491. #1:/Alaska Earthquake March 27, 1964/aeq00043 ID. Alaska Earthquake no. 43ct Alaska Earthquake March 27, 1964. A subsidence trough (or graben) formed at the head of the L Street landslide in Anchorage during the earthquake. The slide block, which is virtually unbroken ground to the left of the graben, moved to the left. The subsidence trough sank 7 to 10 feet in response to 11 feet of horizontal movement of the slide block. A number of houses were undercut or tilted by subsidence of the graben. Note also the collapsed Four Seasons Apartment Building and the undamaged three-story reinforced concrete frame building behind it, which are on the stable block beyond the graben. Figure 18-A, U.S. Geological Survey Circular 491. #1:/Alaska Earthquake March 27, 1964/aeq00044 ID. Alaska Earthquake no. 44ct Alaska Earthquake March 27, 1964. One of the scarps bounding the graben of the L Street landslide in Anchorage. The house was undercut by subsidence of the graben. 1964. #1:/Alaska Earthquake March 27, 1964/aeq00045 ID. Alaska Earthquake no. 45ct Alaska Earthquake March 27, 1964. Scarp at the subsidence trough or graben of the Fourth Avenue landslide, downtown Anchorage. Before the earthquake, the side walk in front of the stores on the right, which are in the graben, was at the level of the street on the left, which was not involved in the subsidence. The graben subsided 11 feet in response to 14 feet of horizontal movement of the slide block during the earthquake. Figure 17, U.S. Geological Survey Professional Paper 541. #1:/Alaska Earthquake March 27, 1964/aeq00046 ID. Alaska Earthquake no. 46ct Alaska Earthquake March 27, 1964. The marquee of the Denali Theater, which was in the graben of the Fourth Avenue landslide in Anchorage, subsided until it came to rest on the sidewalk in front of the theater, which was on ground not involved in the landslide. #1:/Alaska Earthquake March 27, 1964/aeq00047 ID. Alaska Earthquake no. 47ct Alaska Earthquake March 27, 1964. Subsidence of the graben at the head of the Government Hill landslide in Anchorage tore apart an elementary school and converted the schoolyard into a jumble of fissures, scarps, and tilted and subsided blocks of broken ground. The flat and relatively unbroken large slide block in the foreground moved away from the school horizontally and as a single mass, creating a void into which the graben block spread and subsided. 1964. #1:/Alaska Earthquake March 27, 1964/aeq00048 ID. Alaska Earthquake no. 48ct Alaska Earthquake March 27, 1964. Government Hill Elementary School in Anchorage which was destroyed by the Government Hill landslide. #1:/Alaska Earthquake March 27, 1964/aeq00049 ID. Alaska Earthquake no. 49ct Alaska Earthquake March 27, 1964. A compressional buckle at the foot of the L Street landslide in Anchorage produced where a slip plane of the landslide intersected the surface of the ground. The buckling tilted the trees. The landslide block, which underlies the hillside in right background, moved toward left foreground. 1964. #1:/Alaska Earthquake March 27, 1964/aeq00050 ID. Alaska Earthquake no. 50ct Alaska Earthquake March 27, 1964. A wooden fence which lay athwart the toe of the L Street landslide in Anchorage was buckled and shortened by compression. Figure 22, U.S. Geological Survey Professional Paper 541. #1:/Alaska Earthquake March 27, 1964/aeq00051 ID. Alaska Earthquake no. 51ct Alaska Earthquake March 27, 1964. Warehouses at the toe of the Fourth Avenue landslide in Anchorage were destroyed by compressional buckling and foreshortening. Much of the supply of food and drink for the city was stored in these buildings, and they were guarded by Eskimo units of the Alaska National Guard. #1:/Alaska Earthquake March 27, 1964/aeq00052 ID. Alaska Earthquake no. 52ct Alaska Earthquake March 27, 1964. A rotational-slip landslide with a well- developed compressional buckle at its toe occurred near the Alaska Native Hospital in Anchorage. The revetment surrounding the ruptured fuel tank kept oil from spilling into the area of the power plant on the left. The slide resulted from failure in the Bootlegger Cove Clay. #1:/Alaska Earthquake March 27, 1964/aeq00053 ID. Alaska Earthquake no. 53ct Alaska Earthquake March 27, 1964. Compressional buckle, the ruptured fuel tank and the revetment at the foot of the landslide near the Alaska Native Hospital in Anchorage. #1:/Alaska Earthquake March 27, 1964/aeq00054 ID. Alaska Earthquake no. 54ct Alaska Earthquake March 27, 1964. The waterfront at Seward, looking south, before it was devastated by earthquake-generated underwater landslides, surge- waves, and tsunami waves. The small boat harbor, the railroad yards, the large docks, and other water facilities were removed by the underwater landslides. #1:/Alaska Earthquake March 27, 1964/aeq00055 ID. Alaska Earthquake no. 55ct Alaska Earthquake March 27, 1964. The waterfront at Seward a few months after the earthquake, looking north. Note the "scalloped" shoreline left by the underwater landslides, the severed tracks in the railroad yard which dangle over the landslide scarp, and the wind row-like heaps of railroad cars and other debris thrown up by the tsunami waves. #1:/Alaska Earthquake March 27, 1964/aeq00056 ID. Alaska Earthquake no. 56ct Alaska Earthquake March 27, 1964. This truck at Lowell Point, 2 miles from Seward, was bent around a tree by the surge waves generated by the underwater landslides along the Seward waterfront. The truck was about 32 feet above water level at the time of the earthquake. #1:/Alaska Earthquake March 27, 1964/aeq00057 ID. Alaska Earthquake no. 57ct Alaska Earthquake March 27, 1964. An underwater landslide in Blackstone Bay produced a large wave which surged to points 80 feet above sea level. The trees in the photo are about 50 to 75 feet high. 1964. Figure 14-A, U.S. Geological Survey Circular 491. #1:/Alaska Earthquake March 27, 1964/aeq00058 ID. Alaska Earthquake no. 58ct Alaska Earthquake March 27, 1964. Trees up to 24 inches in diameter and between 88 and 101 feet above sea level were broken and splintered by the surge wave generated by an underwater landslide in Port Valdez on Prince William Sound. #1:/Alaska Earthquake March 27, 1964/aeq00059 ID. Alaska Earthquake no. 59ct Alaska Earthquake March 27, 1964. The dock area, a tank farm, and railroad facilities at Whittier were severely damaged by surge-waves developed by underwater landslides in Passage Canal. The waves inundated the area of darkened ground, where the snow was soiled or removed by the waves. #1:/Alaska Earthquake March 27, 1964/aeq00060 ID. Alaska Earthquake no. 60ct Alaska Earthquake March 27, 1964. Indication of the violence of the surge waves that struck Whittier: man holds mounted ten-ply tire through which a 2 by 6-inch plank of wood has been driven by a wave. Figure 31, U.S. Geological Survey Professional Paper 541; Figure 20 (black and white), U.S. Geological Survey Professional Paper 542-B. #1:/Alaska Earthquake March 27, 1964/aeq00061 ID. Alaska Earthquake no. 61ct Alaska Earthquake March 27, 1964. Part of the snow-covered delta at the head of Skilak Lake which was intensely fissured during the earthquake. The fissures show as black lines in the snow because water-bearing sand and silt were extruded along many of the fissures during the earthquake. The fissures are most evident on either side of the braided stream channel that crosses the field of view diagonally. The irregular polygons that are defined by the intersecting fissures are a few tens to a few hundred feet in diameter. Figure 5-A, U.S. Geological Survey Circular 491. #1:/Alaska Earthquake March 27, 1964/aeq00062 ID. Alaska Earthquake no. 62ct Alaska Earthquake March 27, 1964. Fissures in outwash gravel overlying the thick Bootlegger Cove Clay (a marine silt of Pleistocene age) damaged pavements, basements, and underground utilities in the Turnagain Heights district of Anchorage. The fissures (the dark lines in the snow) cross a road and snow-covered lawns and trend toward house foundations. 1964. #1:/Alaska Earthquake March 27, 1964/aeq00063 ID. Alaska Earthquake no. 63ct Alaska Earthquake March 27, 1964. Clastic dikes composed of sand and silt were intruded along fissures into near-surface sediments and overlying snow and ice in the delta of Snow River on the Kanai Peninsula. The dikes were left in relief when the snow and ice melted. Figure 7, U.S. Geological Survey Professional Paper 541. #1:/Alaska Earthquake March 27, 1964/aeq00064 ID. Alaska Earthquake no. 64ct Alaska Earthquake March 27, 1964. Clastic dikes composed of sand and silt were intruded along fissures into near-surface sediments and overlying snow and ice in the delta of Snow River on the Kanai Peninsula. The dikes stood in relief when the snow and ice melted. 1964. #1:/Alaska Earthquake March 27, 1964/aeq00065 ID. Alaska Earthquake no. 65ct Alaska Earthquake March 27, 1964. This highway embankment fissured and spread (lurched). The road was built on thick deposits of alluvium and tidal estuary mud along Turnagain Arm near Portage. 1964. #1:/Alaska Earthquake March 27, 1964/aeq00066 ID. Alaska Earthquake no. 66ct Alaska Earthquake March 27, 1964. This culvert apparently did not collapse, but bent as the entire road embankment sank into the underlying soft water- saturated mud during the earthquake. 1964. #1:/Alaska Earthquake March 27, 1964/aeq00067 ID. Alaska Earthquake no. 67ct Alaska Earthquake March 27, 1964. Sags in the roadbed of The Alaska Railroad on the Kenai Peninsula formed where sand, silt, gravel, and railroad ballast were discharged from within and beneath the railroad embankment during the earthquake. The discharges formed the dark irregular patches of sediment in the brown vegetation between the embankment and the forest on the right. The discharges tend to occur opposite the sags in the roadbed. #1:/Alaska Earthquake March 27, 1964/aeq00068 ID. Alaska Earthquake no. 68ct Alaska Earthquake March 27, 1964. The gravel embankment in the foreground, which forms the approach to this bridge across the Copper River, rests on thick deposits of unconsolidated alluvium. Before the earthquake, the top of the gravel embankment subsided level with the bridge deck. During the earthquake, the embankment subsided into the underlying sediments and was deformed by lateral spreading and compaction. As a result, the top of the embankment now lies about 4 feet below the bridge deck. #1:/Alaska Earthquake March 27, 1964/aeq00069 ID. Alaska Earthquake no. 69ct Alaska Earthquake March 27, 1964. The deltaic sediment spread laterally toward the water-filled channel during the earthquake. This sort of lateral spreading toward "free" or unconstrained faces (here the channel walls are the "free" faces) was commonplace in the epicentral region. The numerous fissures which were opened in the process are an inch or so to a foot or two wide. #1:/Alaska Earthquake March 27, 1964/aeq00070 ID. Alaska Earthquake no. 70ct Alaska Earthquake March 27, 1964. The channelward movement of stream banks composed of unconsolidated materials compressed and buckled many railroad bridges in the epicentral region. The tracks beyond the areas of channelward movement were, of course, pulled apart, and many of the angle bards connecting the tracks were broken. This bridge on the Kenai Peninsula buckled laterally. #1:/Alaska Earthquake March 27, 1964/aeq00071 ID. Alaska Earthquake no. 71ct Alaska Earthquake March 27, 1964. The rails in this approach to a railroad bridge near the head of Turnagain Arm were torn from their ties and buckled laterally by streamward movement of the riverbanks during the earthquake. The bridge was also compressed and developed a hump from vertical buckling. Figure 24, U.S. Geological Survey Professional Paper 541. #1:/Alaska Earthquake March 27, 1964/aeq00072 ID. Alaska Earthquake no. 72ct Alaska Earthquake March 27, 1964. This railroad bridge on the Kenai Peninsula was strongly compressed by channelward movement of the stream banks during the earthquake. The bridge buckled vertically, producing a sharp hump in the roadbed and lifting some of the bridge piling with it. #1:/Alaska Earthquake March 27, 1964/aeq00073 ID. Alaska Earthquake no. 73ct Alaska Earthquake March 27, 1964. The rails were buckled by lateral movement of the embankment fill toward an underlying culvert which had collapsed. #1:/Alaska Earthquake March 27, 1964/aeq00074 ID. Alaska Earthquake no. 74ct Alaska Earthquake March 27, 1964. The concrete abutments of this steel girder highway bridge were carried channelward by the underlying sediments, but the steel girders resisted the compressive movement. As a result, the upper part of this abutment, which was held more or less in place by the girders, was torn loose from the lower part, which was below the girders and moved channelward. #1:/Alaska Earthquake March 27, 1964/aeq00075 ID. Alaska Earthquake no. 75ct Alaska Earthquake March 27, 1964. This railroad embankment moved to the right on a very gentle slop during the earthquake, but the movement was arrested at the crossroad. The movement of the embankment to the right is shown by the railroad tracks which bend upslope (toward the left) as the approach the crossroad. #1:/Alaska Earthquake March 27, 1964/aeq00238 ID. Alaska Earthquake no. 238 Alaska Earthquake March 27, 1964. Sherman Glacier before the 1964 earthquake. Note medial and lateral moraines. August 26, 1963. Figure 7, U.S. Geological Survey Professional Paper 544-D. #1:/Alaska Earthquake March 27, 1964/aeq00239 ID. Alaska Earthquake no. 239 Alaska Earthquake March 27, 1964. Rockslide avalanche on Sherman Glacier. The avalanche was formed by the collapse of Shattered Peak in the middle distance. The debris shows flowlines and terminal digitate lobes. No marginal dust layer is present. View is southeast. Photo by A. Post, August 24, 1964. Figure 8, U.S. Geological Survey Professional Paper 544-D. #1:/Zion National Park/ajc00017 ID. Anderson, J.C. 17 Zion National Park, Utah. Pot holes in a branch of Co-Op Creek where it flows across slightly inclined Navajo Sandstone. The depressions are partly filled and re-excavated during floods. Photo by J.C. Anderson, 1934. Figure 128, U.S. Geological Survey Professional Paper 220. #1:/Arkansas-Professional paper 24/agi00082 ID. Adams, G.I. 82 Fissure and shaft house at Baker and McGrath Mine, SW 1/4 sec. 18, T.16 N., R.22 W. Newton County, Arkansas. 1902. Plate 26-B in U.S. Geological Survey. Professional paper 24. 1904. #1:/Arkansas-Professional paper 24/agi00086 ID. Adams, G.I. 86 Near view of dolomite breccia cemented with pink spar, at Bonanza mine. Marion County, Arkansas. 1902. Plate 8-B in U.S. Geological Survey. Professional paper 24. 1904. #1:/Arkansas-Professional paper 24/agi00088 ID. Adams, G.I. 88 Mass of silicified breccia marking the St. Joe fault, near the Excelsior mine. Searcy County, Arkansas. 1902. Plate 8-A U.S. Geological Survey. Professional paper 24. 1904. #1:/Arkansas-Professional paper 24/agi00089 ID. Adams, G.I. 89 Ledge of Key Sandstone. Arkansas. 1902. Plate 7-B in U.S. Geological Survey. Professional paper 24. 1904. #1:/Arkansas-Professional paper 24/agi00098 ID. Adams, G.I. 98 Beulah mine. Marion County, Arkansas. 1902. Plate 20-B in U.S. Geological Survey. Professional paper 24. 1904. #1:/Arkansas-Professional paper 24/agi00099 ID. Adams, G.I. 99 Nakomis Mine, sec. 32. T.20 N., R. 17 W. Marion County, Arkansas. 1902. Plate 19-A in U.S. Geological Survey. Professional paper 24. 1904. #1:/Arkansas-Professional paper 24/agi00101 ID. Adams, G.I. 101 Climax mine, NE 1/4 sec. 1, T. 17N., R. 16 W. Marion County, Arkansas. 1902. Plate 21-A in U.S. Geological Survey. Professional paper 24. 1904. #1:/Arkansas-Professional paper 24/agi00102 ID. Adams, G.I. 102 Almy Mine Boone County, Arkansas. 1902. Plate 17-B in U.S. Geological Survey. Professional paper 24. 1904. #1:/Arkansas-Professional paper 24/agi00103 ID. Adams, G.I. 103 McIntosh mill connected with Morning Star mine by cable tram. Marion County, Arkansas. 1902. Plate 23-B in U.S. Geological Survey. Professional paper 24. 1904. #1:/Arkansas-Professional paper 24/agi00104 ID. Adams, G.I. 104 Morning Star mill connected with Climax mine by gravity tram. Marion County, Arkansas. 1902. Plate 21-B in U.S. Geological Survey. Professional paper 24. 1904. #1:/Arkansas-Professional paper 24/agi00105 ID. Adams, G.I. 105 Markle Mine hand jigs. Marion County, Arkansas. 1902. Plate 18-B in U.S. Geological Survey. Professional paper 24. 1904. #1:/Arkansas-Professional paper 24/agi00106 ID. Adams, G.I. 106 Susquehana Mine, sec. 8. T. 19 N., R. 17 W. Marion County, Arkansas. 1902. Plate 19-B in U.S. Geological Survey. Professional paper 24. 1904. #1:/Arkansas-Professional paper 24/agi00109 ID. Adams, G.I. 109 Red Cloud mine NW 1/4 sec. 14, T.17 N., R. 15 W. Marion County, Arkansas. 1902. Plate 25-B in U.S. Geological Survey. Professional paper 24. 1904. #1:/Nevada-Professional paper 42/agi00117 ID. Adams, G.I. 117 Form a panorama north from Butler Mountain; Mount Brougher (photo 117) Midway and Siebert shafts (118), Montana Tonopah, North Star, Mount Oddie, and Desert Queen, Gold Hill, Mount Ararat and Boston Tonopah, Tonopah and California, and Rescue shafts (119) and Halifax and Molly shafts (120). Nye County, Nevada. Circa 1900, plates 5-E and F in U.S. Geological Survey. Professional paper 42. 1905. #1:/Nevada-Professional paper 42/agi00118 ID. Adams, G.I. 118 Form a panorama north from Butler Mountain; Mount Brougher (photo 117) Midway and Siebert shafts (118), Montana Tonopah, North Star, Mount Oddie, and Desert Queen, Gold Hill, Mount Ararat and Boston Tonopah, Tonopah and California, and Rescue shafts (119) and Halifax and Molly shafts (120). Overlooking the town of Tonopah, Nye County, Nevada. Circa 1900, plates 5-E and F in U.S. Geological Survey. Professional paper 42. 1905. #1:/Nevada-Professional paper 42/agi00119 ID. Adams, G.I. 119 Form a panorama north from Butler Mountain; Mount Brougher (photo 117) Midway and Siebert shafts (118), Montana Tonopah, North Star, Mount Oddie, and Desert Queen, Gold Hill, Mount Ararat and Boston Tonopah, Tonopah and California, and Rescue shafts (119) and Halifax and Molly shafts (120). Nye County, Nevada. Circa 1900, plates 5-E and F in U.S. Geological Survey. Professional paper 42. 1905. #1:/Nevada-Professional paper 42/agi00120 ID. Adams, G.I. 120 Form a panorama north from Butler Mountain; Mount Brougher (photo 117) Midway and Siebert shafts (118), Montana Tonopah, North Star, Mount Oddie, and Desert Queen, Gold Hill, Mount Ararat and Boston Tonopah, Tonopah and California, and Rescue shafts (119) and Halifax and Molly shafts (120). Nye County, Nevada. Circa 1900, plates 5-E and F in U.S. Geological Survey. Professional paper 42. 1905. #1:/Nevada-Professional paper 42/agi00123 ID. Adams, G.I. 123 Form a panorama, looking south from Butler Mountain. Nye County, Nevada. Circa 1900, plates 2-E and F in U.S. Geological Survey. Professional paper 42. 1905. #1:/Nevada-Professional paper 42/agi00124 ID. Adams, G.I. 124 Form a panorama, looking south from Butler Mountain. Nye County, Nevada. Circa 1900, plates 2-E and F in U.S. Geological Survey. Professional paper 42. 1905. #1:/Nevada-Professional paper 42/agi00125 ID. Adams, G.I. 125 Form a panorama, looking south from Butler Mountain. Nye County, Nevada. Circa 1900, plates 2-E and F in U.S. Geological Survey. Professional paper 42. 1905. #1:/Nevada-Professional paper 42/agi00126 ID. Adams, G.I. 126 Form a panorama, looking south from Butler Mountain. Nye County, Nevada. Circa 1900, plates 2-E and F in U.S. Geological Survey. Professional paper 42. 1905. #1:/Nevada-Professional paper 42/agi00131 ID. Adams, G.I. 131 Form a panorama from near eastern corner of area mapped, left to right; Mount Golden (photo 131), Mount Butler (132), Rushton Hill (133), and Mount Ararat (135), Nye County, Nevada. Circa 1900, plate 2-A and B in U.S. Geological Survey. Professional paper 42. 1905. #1:/Nevada-Professional paper 42/agi00132 ID. Adams, G.I. 132 Form a panorama from near eastern corner of area mapped, left to right; Mount Golden (photo 131), Mount Butler (132), Rushton Hill (133), and Mount Ararat (135), Nye County, Nevada. Circa 1900, plate 2-A and B in U.S. Geological Survey. Professional paper 42. 1905. #1:/Nevada-Professional paper 42/agi00133 ID. Adams, G.I. 133 Form a panorama from near eastern corner of area mapped, left to right; Mount Golden (photo 131), Mount Butler (132), Rushton Hill (133), and Mount Ararat (135), Nye County, Nevada. Circa 1900, plate 2-A and B in U.S. Geological Survey. Professional paper 42. 1905. #1:/Nevada-Professional paper 42/agi00134 ID. Adams, G.I. 134 Form a panorama from near eastern corner of area mapped, left to right; Mount Golden (photo 131), Mount Butler (132), Rushton Hill (133), and Mount Ararat (135), Nye County, Nevada. Circa 1900, plate 2-A and B in U.S. Geological Survey. Professional paper 42. 1905. #1:/Nevada-Professional paper 42/agi00135 ID. Adams, G.I. 135 Form a panorama from near eastern corner of area mapped, left to right; Mount Golden (photo 131), Mount Butler (132), Rushton Hill (133), and Mount Ararat (135), Nye County, Nevada. Circa 1900, plate 2-A and B in U.S. Geological Survey. Professional paper 42. 1905. #1:/Nevada-Professional paper 42/agi00136 ID. Adams, G.I. 136 Form a panoramic view looking northwest from a point between Rushton Hill and Golden Mountain; showing the locations of Boston Tonopah, Wringfield and Butte Tonopah shafts (photos 137 and 138). Nye County, Nevada. Circa 1900, plate 5-E and F in U.S. Geological Survey. Professional paper 42. 1905. #1:/Nevada-Professional paper 42/agi00137 ID. Adams, G.I. 137 Form a panoramic view looking northwest from a point between Rushton Hill and Golden Mountain; showing the locations of Boston Tonopah, Wringfield and Butte Tonopah shafts (photos 137 and 138). Nye County, Nevada. Circa 1900, plate 5-E and F in U.S. Geological Survey. Professional paper 42. 1905. #1:/Nevada-Professional paper 42/agi00138 ID. Adams, G.I. 138 Form a panoramic view looking northwest from a point between Rushton Hill and Golden Mountain; showing the locations of Boston Tonopah, Wringfield and Butte Tonopah shafts (photos 137 and 138). Nye County, Nevada. Circa 1900, plate 5-E and F in U.S. Geological Survey. Professional paper 42. 1905. #1:/Nevada-Professional paper 42/agi00145 ID. Adams, G.I. 145 Form a panorama of Tonopah and surroundings, looking west from Mount Oddie; Desert Queen shaft and Tonopah and California shaft on (photo 145), Mount Butler and Gold Hill (146), Tonopah City, Valley View, Wandering Boy, Big Tom, and Fraction No. 1 shafts (147), Fraction No. 2, Mount Brougher, and West End shafts (148) and Siebert, McNamara, and Ohio Tonopah shafts (149). Nye County, Nevada. Circa 1900, plates 2-C and D in U.S. Geological Survey. Professional paper 42. 1905. #1:/Nevada-Professional paper 42/agi00146 ID. Adams, G.I. 146 Form a panorama of Tonopah and surroundings, looking west from Mount Oddie; Desert Queen shaft and Tonopah and California shaft on (photo 145), Mount Butler and Gold Hill (146), Tonopah City, Valley View, Wandering Boy, Big Tom, and Fraction No. 1 shafts (147), Fraction No. 2, Mount Brougher, and West End shafts (148) and Siebert, McNamara, and Ohio Tonopah shafts (149). Nye County, Nevada. Circa 1900, plates 2-C and D in U.S. Geological Survey. Professional paper 42. 1905. #1:/Nevada-Professional paper 42/agi00147 ID. Adams, G.I. 147 Form a panorama of Tonopah and surroundings, looking west from Mount Oddie; Desert Queen shaft and Tonopah and California shaft on (photo 145), Mount Butler and Gold Hill (146), Tonopah City, Valley View, Wandering Boy, Big Tom, and Fraction No. 1 shafts (147), Fraction No. 2, Mount Brougher, and West End shafts (148) and Siebert, McNamara, and Ohio Tonopah shafts (149). Nye County, Nevada. Circa 1900, plates 2-C and D in U.S. Geological Survey. Professional paper 42. 1905. #1:/Nevada-Professional paper 42/agi00149 ID. Adams, G.I. 149 Form a panorama of Tonopah and surroundings, looking west from Mount Oddie; Desert Queen shaft and Tonopah and California shaft on (photo 145), Mount Butler and Gold Hill (146), Tonopah City, Valley View, Wandering Boy, Big Tom, and Fraction No. 1 shafts (147), Fraction No. 2, Mount Brougher, and West End shafts (148) and Siebert, McNamara, and Ohio Tonopah shafts (149). Nye County, Nevada. Circa 1900, plates 2-C and D in U.S. Geological Survey. Professional paper 42. 1905. #1:/Nevada-Professional paper 42/agi00150 ID. Adams, G.I. 150 Form a panorama of Mount Oddie from the northwest, North Star shaft (photo 150) Montana Tonopah, Siebert and Valley View shafts (151). Nye County, Nevada. Circa 1900, plate 9-B in U.S. Geological Survey. Professional paper 42. 1905. #1:/Nevada-Professional paper 42/agi00151 ID. Adams, G.I. 151 Form a panorama of Mount Oddie from the northwest, North Star shaft (photo 150) Montana Tonopah, Siebert and Valley View shafts (151). Nye County, Nevada. Circa 1900, plate 9-B in U.S. Geological Survey. Professional paper 42. 1905. #1:/Nevada-Professional paper 42/agi00152 ID. Adams, G.I. 152 Siebert shaft, Tonopah Mining Company. Nye County, Nevada. Circa 1900, plate 18 in U.S. Geological Survey. Professional paper 42. 1905. #1:/Nevada-Professional paper 42/agi00153 ID. Adams, G.I. 153 Heller Butte, Nye County, Nevada, circa 1900, plate 4 in U.S. Geological Survey. Professional paper 42. 1905. #1:/Nevada-Professional paper 42/agi00154 ID. Adams, G.I. 154 Butler Mountain from east base, showing columnar dacite above and stratified Siebert tuffs below. Nye County, Nevada. Circa 1900, plate 6-B in U.S. Geological Survey. Professional paper 42. 1905. #1:/Nevada-Professional paper 42/agi00156 ID. Adams, G.I. 156 Face of Siebert Mountain from the southeast. Nye County, Nevada. Circa 1900, plate 10 with diagram in U.S. Geological Survey. Professional paper 42. 1905. #1:/Nevada-Professional paper 42/agi00157 ID. Adams, G.I. 157 Form a panorama of Mount Butler as viewed from the north. Nye County, Nevada. Circa 1900, plates 5-A and B in U.S. Geological Survey. Professional paper 42. 1905. #1:/Nevada-Professional paper 42/agi00158 ID. Adams, G.I. 158 Form a panorama of Mount Butler as viewed from the north. Nye County, Nevada. Circa 1900, plates 5-A and B in U.S. Geological Survey. Professional paper 42. 1905. #1:/Nevada-Professional paper 42/agi00159 ID. Adams, G.I. 159 Form a panorama of Mount Butler as viewed from the north. Nye County, Nevada. Circa 1900, plates 5-A and B in U.S. Geological Survey. Professional paper 42. 1905. #1:/Nevada-Professional paper 42/agi00160 ID. Adams, G.I. 160 Form a panorama of Mount Butler as viewed from the north. Nye County, Nevada. Circa 1900, plates 5-A and B in U.S. Geological Survey. Professional paper 42. 1905. #1:/Nevada-Professional paper 42/agi00161 ID. Adams, G.I. 161 Brougher Mountain and Tonopah, seen from Mizpah Hill. Nye County, Nevada. Circa 1900, plate 6-A in U.S. Geological Survey. Professional paper 42. 1905. #1:/Nevada-Professional paper 42/agi00162 ID. Adams, G.I. 162 Form a panorama of Siebert Mountain from the northeast. Nye County, Nevada. Circa 1900, plate 9-A in U.S. Geological Survey. Professional paper 42. 1905. #1:/Nevada-Professional paper 42/agi00163 ID. Adams, G.I. 163 Form a panorama of Siebert Mountain from the northeast. Nye County, Nevada. Circa 1900, plate 9-A in U.S. Geological Survey. Professional paper 42. 1905. #1:/Zion National Park/ajc00018 ID. Anderson, J.C. 18 Zion National Park, Utah. Tower of Navajo Sandstone capped by iron concretion along the highway near the east entrance station. 1937. #1:/Zion National Park/ajc00019 ID. Anderson, J.C. 19 Zion National Park, Utah. Cross-bedded Navajo Sandstone along the Zion-Mount Carmel road. Checker Board Mesa on the horizon. Temple Cap Member in the upper right. 1936. #1:/Zion National Park/ajc00020 ID. Anderson, J.C. 20 Zion National Park, Utah. Great Arch near base of Navajo Sandstone in Pine Creek Canyon. Photo by J.C. Anderson, 1936. Figure 125, U.S. Geological Survey Professional Paper 220. #1:/Zion National Park/ajc00021 ID. Anderson, J.C. 21 Zion National Park, Utah. Water fall at Temple of Sinawava. 1934. #1:/Zion National Park/ajc00023 ID. Anderson, J.C. 23 Zion National Park, Utah. Navajo Sandstone strata on Walter Wiggles (trail?) in Refrigerator Canyon on trail of Angels Landing. 1936. #1:/Zion National Park/ajc00029 ID. Anderson, J.C. 29 Zion National Park, Utah. Refrigerator Canyon on the West Rim Trail. Circa 1936. #1:/Zion National Park/ajc00031 ID. Anderson, J.C. 31 Zion National Park, Utah. Zion Park cliffs, from Shinarump bench, near the base of Smithsonian Butte. Virgin River in the middle distance. West Temple in the center distance. Bridge Mountain, East Temple, The Twin Brothers, and Mountain of the Sun on the right. 1936. #1:/Bryce Canyon National Park/ajc00035 ID. Anderson, J.C. 35 Bryce Canyon National Park, Utah. Table Cliff Plateau, looking northeast from Bryce Point. Paria River in the middle distance. 1935. #1:/Zion National Park/ajc00066 ID. Anderson, J.C. 66 Zion National Park, Utah. Virgin River in Zion Canyon at the beginning of a new flood, after a flood that filled the valley two weeks earlier. 1938. Figure 105-B, U.S. Geological Survey Professional Paper 220. #1:/Zion National Park/ajc00067 ID. Anderson, J.C. 67 Zion National Park, Utah. Navajo Sandstone that forms the Sentinel. Upper part, white, massive, cross-bedded, capped by limestone of the Carmel Formation. Lower part, made dark red by abundant iron cement, consists mainly of bedded sandstone. Talus cone and landslide debris (middle and lower left). 1938. Figure 50, U.S. Geological Survey Professional Paper 220. #1:/Zion National Park/ajc00068 ID. Anderson, J.C. 68 Zion National Park, Utah. Navajo Sandstone, upper part, at the east entrance. Lower cliff is upper part of main bed of massive cross-bedded sandstone. Upper cliff is massive sandstone of the Temple Cap Member extending downward into shale (tree covered slope) and upward to limestone of the Carmel Formation. 1938. Figure 52, U.S. Geological Survey Professional Paper 220. #1:/Zion National Park/ajc00074 ID. Anderson, J.C. 74 Zion National Park, Utah. Ephemeral waterfall at Temple of Sinawava in Zion Canyon. For about an hour after heavy rainstorms, water drops over the canyon rim 1,800 feet to the Virgin River below. Photo by J.C. Anderson, 1937. Figure 98, U.S. Geological Survey Professional Paper 220. #1:/Zion National Park/ajc00075 ID. Anderson, J.C. 75 Zion National Park, Utah. Ephemeral waterfall on Pine Creek which disappears about half an hour after the rain. 1937. #1:/Zion National Park/ajc00080 ID. Anderson, J.C. 80 Zion National Park, Utah. Upper Chinle, Wingate, Kayenta, and Navajo Formations on the face of Bridge Mountain. Springdale Member ledge near the base. 1938. #1:/Zion National Park/ajc00082 ID. Anderson, J.C. 82 Zion National Park, Utah. Navajo Sandstone on East Rim Trail (center) on Cable Mountain. 1938. #1:/Zion National Park/ajc00083 ID. Anderson, J.C. 83 Zion National Park, Utah. Navajo Sandstone, viewed from a tunnel window across Pine Creek. The Sentinel is in distance. 1938. #1:/Zion National Park/ajc00088 ID. Anderson, J.C. 88 Zion National Park, Utah. Petrified log near base of the Chinle Formation, north of Rockville. 1938. #1:/Bryce Canyon National Park/ajc00091 ID. Anderson, J.C. 91 Bryce Canyon National Park, Utah. Pinnacles of Wasatch Limestone southeast from Little Bryce Point across Paria Amphitheater. Upturned Navajo Sandstone in the distance. 1938. #1:/Cedar Breaks National Monument/ajc00093 ID. Anderson, J.C. 93 Cedar Breaks National Monument, Utah. Wasatch Limestone on the north rim of the canyon. Iron Mountain in the distance west. 1938. #1:/Cedar Breaks National Monument/ajc00097 ID. Anderson, J.C. 97 Cedar Breaks National Monument, Utah. Fault on Rim Point in the Wasatch Formation. 1938. #1:/Cedar Breaks National Monument/ajc00098 ID. Anderson, J.C. 98 Cedar Breaks National Monument, Utah. Spur on wall of the canyon in the Wasatch Limestone. 1938. #1:/Zion National Park/ajc0064a ID. Anderson, J.C. 64a Zion National Park, Utah. Virgin River in Zion Canyon during a prolonged period of low water. 1938. Figure 105-A, U.S. Geological Survey Professional Paper 220. #1:/Zion National Park/ajc0064f ID. Anderson, J.C. 64f Zion National Park, Utah. Virgin River in Zion Canyon at a time of rapidly increasing volume when water and transported sediment are combined in "sand waves". 1938. Figure 105-C, U.S. Geological Survey Professional Paper 220. #1:/Alaska Earthquake March 27, 1964/ake00001 ID. Alaska Earthquake no. 1 Alaska Earthquake March 27, 1964. Fault displacement. The northwest block (left) of the Hanning Bay fault has been displaced upward between 4 and 5 meters, relative to the southeast block, along a high angle reverse fault. The white coating on the reef rock of the upthrown block consists of the bleached remains of calcareous algae and bryozoans that lived below mean tide level. Photo by G. Plafker, 1964. #1:/Alaska Earthquake March 27, 1964/ake00002 ID. Alaska Earthquake no. 2 Alaska Earthquake March 27, 1964. Living spruce trees 2 feet in diameter were snapped off by a local wave at elevations between 88 and 101 feet above lower low water near Shoup Bay at Port Valdez. Photo by G. Plafker, 1964. Figure 3, U.S. Geological Survey Professional Paper 542-G. #1:/Alaska Earthquake March 27, 1964/ake00003 ID. Alaska Earthquake no. 3 Alaska Earthquake March 27, 1964. Barge, 60 feet long and 25 feet wide, that was broken loose from its mooring by a violent local wave in Port Nellie Juan, turned upside down, and deposited among the trees 200 feet from the shoreline at about 30 feet above mean lower low water. Photoby G. Plafker, 1964. Figure 16, U.S. Geological Survey Professional Paper 542-G. #1:/Alaska Earthquake March 27, 1964/ake00004 ID. Alaska Earthquake no. 4 Alaska Earthquake March 27, 1964. Barnacle line on the hull of the S.S. Goldbrook at Middleton Island. The upper growth limit of the dark band of barnacles on this vertical surface is clearly defined and at a uniform level, even though it is in a locality that was exposed to open-coast surf conditions prior to the earthquake. Indicated uplift is 11.7 feet. Photo was taken at 6.5-foot tide stage. Photo by G. Plafker, July 26, 1965. Figure 7, U.S. Geological Survey Professional Paper 543-I. #1:/Alaska Earthquake March 27, 1964/ake00006 ID. Alaska Earthquake no. 6 Alaska Earthquake March 27, 1964. Debris in Eklutna tunnel, northeast of Anchorage at the Eklutna Powerplant, is typical of that deposited throughout the initial 3.5 miles of the tunnel. Photo by M.H. Logan, U.S. Bureau of Reclamation, 1964. Figure 9, U.S. Geological Survey Professional Paper 545-A. #1:/Alaska Earthquake March 27, 1964/ake00007 ID. Alaska Earthquake no. 7 Alaska Earthquake March 27, 1964. Earth settlement over the penstock anchor block directly behind the Eklutna powerhouse, northeast of Anchorage. This settlement did not appear until two weeks after the earthquake. Presumably, the bridging effect of the blacktop and ground frost concealed the settlement during this period. Photo by M.H. Logan, U.S. Bureau of Reclamation, 1964. Figure 13, U.S. Geological Survey Professional Paper 545-A. #1:/Alaska Earthquake March 27, 1964/ake00011 ID. Alaska Earthquake no. 11 Alaska Earthquake March 27, 1964. Machine-shop foundation at the Eklutna Powerplant, northeast of Anchorage. Backfill material is separated from the concrete footing. Approximately 1.5 feet of H- section pile is now exposed. Photo by M.H. Logan, U.S. Bureau of Reclamation, 1964. Figure 19, U.S. Geological Survey Professional Paper 545-A. #1:/Alaska Earthquake March 27, 1964/ake00012 ID. Alaska Earthquake no. 12 Alaska Earthquake March 27, 1964. 20,000-kva transformer conduit and terminal box at the Eklutna Powerplant, northeast of Anchorage, was damaged by movement of the transformer during the earthquake. Rail stops consisted of 1/4 by 1- inch wide bar tack-welded to the rail. The tack welds broke and allowed the transformer to move on the rails. Photo by M.H. Logan, U.S. Bureau of Reclamation, 1964. Figure 20, U.S. Geological Survey Professional Paper 545-A. #1:/Alaska Earthquake March 27, 1964/ake00013 ID. Alaska Earthquake no. 13 Alaska Earthquake March 27, 1964. Damage to the heating system piping in the floor of the automotive repair shop at the Eklutna Powerplant, northeast of Anchorage. Photo by M.H. Logan, U.S. Bureau of Reclamation, 1964. Figure 21, U.S. Geological Survey Professional Paper 545-A. #1:/Alaska Earthquake March 27, 1964/ake00014 ID. Alaska Earthquake no. 14 Alaska Earthquake March 27, 1964. Pavement damage at the Eklutna Powerplant, northeast of Anchorage. Cracks extend from the garage east along the north wall of the warehouse on the right. Photo by M.H. Logan, U.S. Bureau of Reclamation, 1964. Figure 23, U.S. Geological Survey Professional Paper 545-A. #1:/Alaska Earthquake March 27, 1964/ake00015 ID. Alaska Earthquake no. 15 Alaska Earthquake March 27, 1964. Pump in the Eklutna Powerplant project office, northeast of Anchorage, shows the effect of the earthquake. The base of the pump is now approximately vie inches above the floor. Photo by M.H. Logan, U.S. Bureau of Reclamation, 1964. Figure 24, U.S. Geological Survey Professional Paper 545-A. #1:/Alaska Earthquake March 27, 1964/ake00016 ID. Alaska Earthquake no. 16 Alaska Earthquake March 27, 1964. Cleaning-up operation at the outlet of the tailrace conduit under Glenn Highway near the Eklutna Powerplant. Debris was deposited following the rupture of the tunnel intake at Eklutna Lake during the earthquake. Photo by M.H. Logan, U.S. Bureau of Reclamation, 1964. Figure 26, U.S. Geological Survey Professional Paper 545-A. #1:/Alaska Earthquake March 27, 1964/ake00017 ID. Alaska Earthquake no. 17 Alaska Earthquake March 27, 1964. Earthquake-induced ground fractures in the middle of the Martin River Valley. Slump blocks moved toward the right. Vertical displacement visible, especially beside the pool on the left. Photo by S.J. Tuthill, 1964. Figure 2, U.S. Geological Survey Professional Paper 543-B. #1:/Alaska Earthquake March 27, 1964/ake00018 ID. Alaska Earthquake no. 18 Alaska Earthquake March 27, 1964. Earthquake-induced ground fractures in the Cooper River Delta several miles west of Ragged Mountain, showing relation to streams and former drainages. Photo by S.J. Tuthill, 1964. Figure 7, U.S. Geological Survey Professional Paper 543-B. #1:/Alaska Earthquake March 27, 1964/ake00019 ID. Alaska Earthquake no. 19 Alaska Earthquake March 27, 1964. Mudvent deposits in the upper Martin River Valley. The cracks resulted from differential compaction. Figure 8, U.S. Geological Survey Professional Paper 543-B. #1:/Alaska Earthquake March 27, 1964/ake00020 ID. Alaska Earthquake no. 20 Alaska Earthquake March 27, 1964. Mudvent deposits in the upper Martin River Valley. The cracks resulted from differential compaction due to grain size variation. Photo by S.J. Tuthill, 1964. Figure 9, U.S. Geological Survey Professional Paper 543-B. #1:/Alaska Earthquake March 27, 1964/ake00022 ID. Alaska Earthquake no. 22 Alaska Earthquake March 27, 1964. Subsidence crater in the upper Martin River Valley. Photo by S.J. Tuthill, 1964. Figure 12, U.S. Geological Survey Professional Paper 543-B. #1:/Alaska Earthquake March 27, 1964/ake00023 ID. Alaska Earthquake no. 23 Alaska Earthquake March 27, 1964. Subsidence craters in mudvent deposits on the western Copper River Delta. Arrows indicate en echelon orientation. Photo by S.J. Tuthill, 1964. Figure 13, U.S. Geological Survey Professional Paper 543-B. #1:/Alaska Earthquake March 27, 1964/ake00024 ID. Alaska Earthquake no. 24 Alaska Earthquake March 27, 1964. Small mudcones on rainpocked mudvent deposits in the upper Martin River Valley. Photo by S.J. Tuthill, 1964. Figure 14, U.S. Geological Survey Professional Paper 543-B. #1:/Alaska Earthquake March 27, 1964/ake00025 ID. Alaska Earthquake no. 25 Alaska Earthquake March 27, 1964. Camp and Sioux Glacier slides. Medial moraine on Sioux Glacier is darker than fresh rock-avalanche debris. Photo by S.J. Tuthill, 1964. Figure 15, U.S. Geological Survey Professional Paper 543- #1:/Alaska Earthquake March 27, 1964/ake00026 ID. Alaska Earthquake no. 26 Alaska Earthquake March 27, 1964. Avalanche debris of Camp slide, viewed from digital margin. Arrows indicate source areas of rock debris. Photo by S.J. Tuthill, 1964. Figure 18, U.S. Geological Survey Professional Paper 543-B. #1:/Alaska Earthquake March 27, 1964/ake00030 ID. Alaska Earthquake no. 30 Alaska Earthquake March 27, 1964. Partially melted snow cone in the Martin River Valley. Arrow at A indicates place where the gravel coating has been removed to show snow interior. B indicates fresh avalanche debris. Photo by S.J. Tuthill, 1964. Figure 25, U.S. Geological Survey Professional Paper 543- #1:/Alaska Earthquake March 27, 1964/ake00039 ID. Alaska Earthquake no. 39 Alaska Earthquake March 27, 1964. High water mark from the early morning wave about #1:45 a.m., March 28, 1964, on a building on the east side of North Front Street between Rudolph Alley and Dike Street in Valdez. Photo by H.W. Coulter, 1964. Figure 17, U.S. Geological Survey Professional Paper 542-C. #1:/Alaska Earthquake March 27, 1964/ake00040 ID. Alaska Earthquake no. 40 Alaska Earthquake March 27, 1964. Damage to the Alaskan Hotel on McKinley Street between Alaska Avenue and Broadway in Valdez. The foundation of this building was intersected by four fissures. Photo by T.L. Pewe, 1964. Figure 18, U.S. Geological Survey Professional Paper 542-C. #1:/Alaska Earthquake March 27, 1964/ake00041 ID. Alaska Earthquake no. 41 Alaska Earthquake March 27, 1964. Transverse fissure through the concrete foundation slab of the Valdez High School at Sherman Street and Empire Avenue in Valdez. Photo by H.W. Coulter, 1964. Figure 19, U.S. Geological Survey Professional Paper 542-C. #1:/Alaska Earthquake March 27, 1964/ake00042 ID. Alaska Earthquake no. 42 Alaska Earthquake March 27, 1964. Transverse fissure at the corner of McKinley Street and Keystone Avenue in Valdez. There is damage to the cinder block building where the main fissure (foreground) intersects it. Similar ground fractures, with and without sand and mud spouts, caused much damage to streets, buildings, and utilities in many parts of the earthquake-affected area. Photo by H.W. Coulter, 1964. Figure 12, U.S. Geological Survey Professional Paper 541. #1:/Alaska Earthquake March 27, 1964/ake00046 ID. Alaska Earthquake no. 46 Alaska Earthquake March 27, 1964. Fishing boat beached by seismic waves several hundred feet inland from the head of Resurrection Bay. Photo by R.W. Lemke, 1964. Frontispiece, U.S. Geological Survey Professional Paper 542-E. #1:/Alaska Earthquake March 27, 1964/ake00047 ID. Alaska Earthquake no. 47 Alaska Earthquake March 27, 1964. Houses and other debris carried by waves into the lagoon area at the north end of Seward. The main road, leading north out of town, is on the right. Photo by U.S. Army, 1964. Figure 8, U.S. Geological Survey Professional Paper 542-E. #1:/Alaska Earthquake March 27, 1964/ake00048 ID. Alaska Earthquake no. 48 Alaska Earthquake March 27, 1964. Damage along the Seward waterfront in the area of Texaco, Inc., tanks. Photo by U.S. Army, 1964. Figure 6, U.S. Geological Survey Professional Paper 542-E. #1:/Alaska Earthquake March 27, 1964/ake00049 ID. Alaska Earthquake no. 49 Alaska Earthquake March 27, 1964. Damage caused by water waves to the old Alaska Railroad dock and facilities in Seward. Photo by U.S. Army, 1964. Figure 5, U.S. Geological Survey Professional Paper 542-E. #1:/Alaska Earthquake March 27, 1964/ake00050 ID. Alaska Earthquake no. 50 Alaska Earthquake March 27, 1964. Wrecked boats and other debris beached by waves at the northwest corner of Resurrection Bay. Photo by U.S. Army, 1964. Figure 10, U.S. Geological Survey Professional Paper 542-E. #1:/Alaska Earthquake March 27, 1964/ake00051 ID. Alaska Earthquake no. 51 Alaska Earthquake March 27, 1964. Wave damage in the area of the railroad marshalling yards in Seward. Photo by U.S. Army, 1964. Figure 7, U.S. Geological Survey Professional Paper 542-E. #1:/Alaska Earthquake March 27, 1964/ake00052 ID. Alaska Earthquake no. 52 Alaska Earthquake March 27, 1964. Incipient landsliding along the northern part of the Seward waterfront. Fractured ground has subsided and rotated as landslide slump blocks. Photo by R.W. Lemke, 1964. Figure 12, U.S. Geological Survey Professional Paper 542-E. #1:/Alaska Earthquake March 27, 1964/ake00053 ID. Alaska Earthquake no. 53 Alaska Earthquake March 27, 1964. Ground fracture near the east end of A Street in Seward about 100 feet from the present shoreline. Vertical displacement is about 4 feet. Downthrown side is toward Resurrection Bay. Photo by R.W. Lemke, 1964. Figure 13, U.S. Geological Survey Professional Paper 542-E. #1:/Alaska Earthquake March 27, 1964/ake00054 ID. Alaska Earthquake no. 54 Alaska Earthquake March 27, 1964. Ground fracture in the Forest Acres area in Seward. The fracture in the foreground is about 2 feet wide. Photo by R.D. Miller, 1964. Figure 16, U.S. Geological Survey Professional Paper 542-E. #1:/Alaska Earthquake March 27, 1964/ake00055 ID. Alaska Earthquake no. 55 Alaska Earthquake March 27, 1964. Wreckage of the J.C. Penney Department Store at Fifth Avenue and D Street in Anchorage. The building failed after sustained seismic shaking. Most of the rubble has been cleared from the streets. Photo by G. Plafker, 1964. Figure 5, U.S. Geological Survey Professional Paper 542-A. #1:/Alaska Earthquake March 27, 1964/ake00057 ID. Alaska Earthquake no. 57 Alaska Earthquake March 27, 1964. Wreckage of the control tower at Anchorage International Airport. The six-story tower failed under sustained seismic shaking. Photo by G. Plafker, 1964. Figure 7, U.S. Geological Survey Professional Paper 542-A. #1:/Alaska Earthquake March 27, 1964/ake00058 ID. Alaska Earthquake no. 58 Alaska Earthquake March 27, 1964. Wreckage of the six-story Four Seasons Apartment Building in Anchorage. Canted elevator shaft is shown at center. The large crack in the foreground, which was filled in to restore traffic on M Street, passed beneath the building. Photo by W.R. Hansen, 1964. Figure 13, U.S. Geological Survey Professional Paper 542-A. #1:/Alaska Earthquake March 27, 1964/ake00059 ID. Alaska Earthquake no. 59 Alaska Earthquake March 27, 1964. Rotational slump near Sleeper Landing Strip on the west side of Knik Arm opposite Cairn Point, Anchorage. At its foot the slump passed into an earthflow. Tidewater is in the foreground. The scarp to the left of upper center is about 80 feet high. Photo by W.R. Hansen, 1964. Figure 19, U.S. Geological Survey Professional Paper 542-A. #1:/Alaska Earthquake March 27, 1964/ake00060 ID. Alaska Earthquake no. 60 Alaska Earthquake March 27, 1964. Part of a sand boil in the Turnagain Heights landslide area in Anchorage. Ridges 2 to 3 feet high and 100 feet or more long were formed as fountains of water ejected through frozen outwash. Photo by W.R. Hansen, 1964. Figure 15, U.S. Geological Survey Professional Paper 542-A. #1:/Alaska Earthquake March 27, 1964/ake00061 ID. Alaska Earthquake no. 61 Alaska Earthquake March 27, 1964. Chaotic pressure ridge at the toe of a rotational slide on Bluff Road in Anchorage. In part, the toe surged forward as an earthflow. Photo by W.R. Hansen, 1964. Figure 21, U.S. Geological Survey Professional Paper 542-A. #1:/Alaska Earthquake March 27, 1964/ake00062 ID. Alaska Earthquake no. 62 Alaska Earthquake March 27, 1964. Wreckage of Government Hill School in Anchorage. The south wing of the building, shown here, collapsed into a graben at the head of the landslide. Slip of the graben block is shown by displacement of the roofline. Photo by W.R. Hansen, 1964. #1:/Alaska Earthquake March 27, 1964/ake00063 ID. Alaska Earthquake no. 63 Alaska Earthquake March 27, 1964. Wrecked dwelling astride boundling fracture, L Street graben at Eighth Avenue and N Street in Anchorage. The damage was caused entirely by ground displacement along the fracture. Photo by W.R. Hansen, 1964. Figure 28, U.S. Geological Survey Professional Paper 542-A. #1:/Alaska Earthquake March 27, 1964/ake00064 ID. Alaska Earthquake no. 64 Alaska Earthquake March 27, 1964. House pushed off its foundation by a pressure ridge at the toe of the L Street landslide in Anchorage. The well- framed house was not otherwise visibly damaged. Push must have been shallow and nearly horizontal. Photo by W.R. Hansen, 1964. Figure 29, U.S. Geological Survey Professional Paper 542-A. #1:/Alaska Earthquake March 27, 1964/ake00065 ID. Alaska Earthquake no. 65 Alaska Earthquake March 27, 1964. Native Hospital landslide in Anchorage, showing graben and pressure ridge. The scar of an older landslide is transected by the slide of March 27. Photo by U.S. Army, 1964. Figure 17-B, U.S. Geological Survey Circular 491; Figure 32, U.S. Geological Survey Professional Paper 542-A. #1:/Alaska Earthquake March 27, 1964/ake00066 ID. Alaska Earthquake no. 66 Alaska Earthquake March 27, 1964. Overthrust toe of the Native Hospital landslide in Anchorage. The road is bulged up and displaced about 12 feet laterally. Overridden trees on the left. Photo by W.R. Hansen, 1964. Figure 34, U.S. Geological Survey Professional Paper 542-A. #1:/Alaska Earthquake March 27, 1964/ake00067 ID. Alaska Earthquake no. 67 Alaska Earthquake March 27, 1964. Wreckage of Government Hill School in Anchorage, as viewed from the playground, looking west. The graben in the foreground is about 12 feet deep. The water tower is undamaged. Photo by W.R. Hansen, 1964. Figure 36, U.S. Geological Survey Professional Paper 542-A; page 43 (upper right), Images of the U.S. Geological Survey, 1879-1979. #1:/Alaska Earthquake March 27, 1964/ake00069 ID. Alaska Earthquake no. 69 Alaska Earthquake March 27, 1964. Homes devastated by the Turnagain Heights landslide in Anchorage, deep within the slide area. About 75 homes were destroyed. Photo by W.R. Hansen, 1964. Figure 39 (upper photo), U.S. Geological Survey Professional Paper 542-A. #1:/Alaska Earthquake March 27, 1964/ake00070 ID. Alaska Earthquake no. 70 Alaska Earthquake March 27, 1964. Tree trunk split by tension fracture in the Turnagain Heights landslide in Anchorage. Many trees were similarly damaged because their roots were firmly embedded in the frozen ground. Photo by W.R. Hansen, 1964. Figure 40, U.S. Geological Survey Professional Paper 542-A. #1:/Alaska Earthquake March 27, 1964/ake00071 ID. Alaska Earthquake no. 71 Alaska Earthquake March 27, 1964. Furrowed, slickensided clay ridge in the Turnagain Heights landslide in Anchorage. Ridge is about 20 feet high. Tilted collapsed block on the left. Photo by W.R. Hansen, 1964. Figure 41, U.S. Geological Survey Professional Paper 542-A. #1:/Alaska Earthquake March 27, 1964/ake00074 ID. Alaska Earthquake no. 74 Alaska Earthquake March 27, 1964. Immediately after the earthquake, the U.S. Geological Survey's research vessel, the Don J. Miller, sailed to Prince William Sound. Photo by C.D. Weingaard, 1964. Figure 38, U.S. Geological Survey Professional Paper 541. #1:/Alaska Earthquake March 27, 1964/ake00076 ID. Alaska Earthquake no. 76 Alaska Earthquake March 27, 1964. Chaotic condition of the commercial section of the city of Kodiak following inundation by seismic sea waves. The small- boat harbor, which was in left background, contained an estimated 160 crab and salmon fishing boats when the waves struck. Tsunamis washed many vessels into the heart of Kodiak. Photo by U.S. Navy, March 30, 1964. Figure 35, U.S. Geological Survey Professional Paper 541; Figure 26, U.S. Geological Survey Professional Paper 543-D. #1:/Alaska Earthquake March 27, 1964/ake00078 ID. Alaska Earthquake no. 78 Alaska Earthquake March 27, 1964. Home in Anchorage moved from a hazardous area to a safe haven. Photo by Genie Chance, 1964. Figure 66, U.S. Geological Survey Professional Paper 541. #1:/Alaska Earthquake March 27, 1964/ake00079 ID. Alaska Earthquake no. 79 Alaska Earthquake March 27, 1964. A few homes situated at the toe of the L Street landslide in Anchorage remained precariously perched on makeshift Foundations fifteen months after the earthquake. Photo by Genie Chance, 1964. Figure 67, U.S. Geological Survey Professional Paper 541. #1:/Alaska Earthquake March 27, 1964/ake00081 ID. Alaska Earthquake no. 81 Alaska Earthquake March 27, 1964. The day after the earthquake, scattered pieces of scrap lumber and an occasional stump were all that remained of several native villages. Photo by U.S. Bureau of Indian Affairs, March 28, 1964. Figure 61, U.S. Geological Survey Professional Paper 541. #1:/Alaska Earthquake March 27, 1964/ake00087 ID. Alaska Earthquake no. 87 Alaska Earthquake March 27, 1964. Part of the Turnagain Heights landslide in Anchorage shortly after the earthquake. Photo by W.R. Hansen, 1964. Frontispiece, U.S. Geological Survey Professional Paper 541. #1:/Alaska Earthquake March 27, 1964/ake00089 ID. Alaska Earthquake no. 89 Alaska Earthquake March 27, 1964. Damage to an elementary school in the Government Hill landslide area in Anchorage shortly after the earthquake. View is northwest. The undamaged far corner of the school was preserved for future use when the remainder of the school was razed. Alaska Communication Service toll building and microwave tower (right) were undamaged. Photo by U.S. Army, 1964. Figure 54, U.S. Geological Survey Professional Paper 541. #1:/Alaska Earthquake March 27, 1964/ake00091 ID. Alaska Earthquake no. 91 Alaska Earthquake March 27, 1964. Post-earthquake erosion at Munson Point on Cook Inlet. About 5 feet of the overhanging vegetal mat attests to recent erosion of the underlying glacial till as a result of higher water levels relative to land. Photo by R.M. Waller, April 13, 1964. Figure 4, U.S. Geological Survey Professional Paper 542-D. #1:/Alaska Earthquake March 27, 1964/ake00094 ID. Alaska Earthquake no. 94 Alaska Earthquake March 27, 1964. Effects of high tides submerging the end of Homer Spit on April 12, 1964. The Lands End Hotel was raised on jacks. Photo by R.M. Waller, 1964. Figure 9-B, U.S. Geological Survey Professional Paper 542-D. #1:/Alaska Earthquake March 27, 1964/ake00095 ID. Alaska Earthquake no. 95 Alaska Earthquake March 27, 1964. Effects of high tides submerging the end of Homer Spit on April 12, 1964. Water rose high enough to flow through the windows of the Salty Dawg Saloon. Photo by R.M. Waller. Figure 9-C, U.S. Geological Survey Professional Paper 542-D. #1:/Alaska Earthquake March 27, 1964/ake00104 ID. Alaska Earthquake no. 104 Alaska Earthquake March 27, 1964. Crack along bedding plane in massive indurated sandstone; 1 foot of left-lateral separation, Patton Bay fault on Montague Island. Photo by G. Plafker. Figure 9, U.S. Geological Survey Professional Paper 543-G. #1:/Alaska Earthquake March 27, 1964/ake00111 ID. Alaska Earthquake no. 111 Alaska Earthquake March 27, 1964. Landslide scars as high as 200 feet (arrows) on the relatively upthrown block of the Patton Bay fault (dashed) near Nellie Martin River on Montague Island. The fault is exposed in the river channel where it dips about 50 degrees northwest (right) and has at least 16 feet of vertical displacement. Photo by G. Plafker. Figure 16, U.S. Geological Survey Professional Paper 543-G. #1:/Alaska Earthquake March 27, 1964/ake00117 ID. Alaska Earthquake no. 117 Alaska Earthquake March 27, 1964. Minor normal faults along a pre-existing linear groove on a steep ridge slope on Montague Island. The downhill side is uplifted 16 inches. Patton River valley is visible in the background. Photo by G. Plafker. Figure 23, U.S. Geological Survey Professional Paper 543-G. #1:/Alaska Earthquake March 27, 1964/ake00121 ID. Alaska Earthquake no. 121 Alaska Earthquake March 27, 1964. Segment of Hanning Bay fault trace on Montague Island, looking northeast. Surface flexure 3 to 5 feet high is broken by gaping sub-parallel right-handed en echelon cracks, 3 to 6 feet apart. Gullies that intersect the scarp at right angles show no evidence of lateral offset that would suggest strike-slip displacement. Photo by G. Plafker. Figure 27, U.S. Geological Survey Professional Paper 543-G. #1:/Alaska Earthquake March 27, 1964/ake00123 ID. Alaska Earthquake no. 123 Alaska Earthquake March 27, 1964. Post-earthquake high-tide shoreline at Fault Cove on Montague Island. The cove was formed by relative uplift of the former sea floor northwest of the fault scarp. The white color on the elevated bedrock surface northwest of the fault results from desiccation of calcareous algae and other calcareous marine organisms. Photo by U.S. Coast and Geodetic Survey, April 17, 1964. Figure 28 (lower photo), U.S. Geological Survey Professional Paper 543-G. #1:/Alaska Earthquake March 27, 1964/ake00126 ID. Alaska Earthquake no. 126 Alaska Earthquake March 27, 1964. Along Hanning Bay fault on Montague Island. Scarp 8.5 feet high has displaced the elevated beach on the south side of Fault Cove. Beach deposits draped across the scarp conceal the fault plane. Photo by M.G. Bonilla, August 4, 1965. Figure 30 (lower photo), U.S. Geological Survey Professional Paper 543-G. #1:/Alaska Earthquake March 27, 1964/ake00128 ID. Alaska Earthquake no. 128 Alaska Earthquake March 27, 1964. Cobble-gravel storm beach on the north side of Fault Cove on Montague Island, which was displaced 16 1/3 feet vertically across the Hanning Bay Fault scarp. Pond on the right occupies a shallow tectonic depression. Photo by M.G. Bonilla. Figure 32, U.S. Geological Survey Professional Paper 543-G. #1:/Alaska Earthquake March 27, 1964/ake00134 ID. Alaska Earthquake no. 134 Alaska Earthquake March 27, 1964. Hanning Bay fault on Montague Island, looking southwest from the bay. The fault trace on the ridge is marked by active landslides. Photo by G. Plafker. Figure 38, U.S. Geological Survey Professional Paper 543-G. #1:/Alaska Earthquake March 27, 1964/ake00138 ID. Alaska Earthquake no. 138 Alaska Earthquake March 27, 1964. Fissures in Seward Highway near The Alaska Railroad station at Portage, at the head of Turnagain Arm. Many bridges were also damaged. At some places, tectonic subsidence and consolidation of alluvial materials dropped both highway and railroad below high-tide levels. Photo by U.S. Army. Figure 27, U.S. Geological Survey Professional Paper 541. #1:/Alaska Earthquake March 27, 1964/ake00139 ID. Alaska Earthquake no. 139 Alaska Earthquake March 27, 1964. Fire, wave, and submarine slide damage to railroad and port facilities at Whittier. Photo by U.S. Army. Figure 33, U.S. Geological Survey Professional Paper 541. #1:/Alaska Earthquake March 27, 1964/ake00140 ID. Alaska Earthquake no. 140 Alaska Earthquake March 27, 1964. Fire and wave damage to the Seward port facilities. Photo by U.S. Army. Figure 34, U.S. Geological Survey Professional Paper 541. #1:/Alaska Earthquake March 27, 1964/ake00144 ID. Alaska Earthquake no. 144 Alaska Earthquake March 27, 1964. Collapse of Fourth Avenue near C Street in Anchorage due to a landslide caused by the earthquake. Before the shock, the sidewalk on the left, which is in the graben, was at street level on the right. The graben subsided 11 feet in response to 14 feet of horizontal movement. Photo by U.S. Army, 1964. Figure 45, U.S. Geological Survey Professional Paper 541. #1:/Alaska Earthquake March 27, 1964/ake00146 ID. Alaska Earthquake no. 146 Alaska Earthquake March 27, 1964. City of Valdez and the waterfront, looking northwest, after the earthquake, submarine slides, and waves. Note the complete removal of the docks and recession of the shoreline. A temporary dock (lower right) was built after the earthquake. Photo by U.S. Army. Figure 49, U.S. Geological Survey Professional Paper 541. #1:/Alaska Earthquake March 27, 1964/ake00149 ID. Alaska Earthquake no. 149 Alaska Earthquake March 27, 1964. Main business "street" of Seldovia. Regional subsidence was due to earthquake-caused flooding by high tides. Sandbags were placed along the boardwalk to prevent it from floating. Photo by U.S. Army. Figure 52, U.S. Geological Survey Professional Paper 541. #1:/Alaska Earthquake March 27, 1964/ake00154 ID. Alaska Earthquake no. 154 Alaska Earthquake March 27, 1964. New site of Valdez and dock facilities (foreground). Old Valdez, devastated by the earthquake, is at center (left) at the head of Port Valdez. Loss of the Valdez waterfront by submarine slides, extensive earthquake damage throughout the town, and the ever-present danger of flooding by Valdez glacial stream (note dikes around town) led to recommendations by U.S. Geological Survey geologists to abandon the town and to rebuild Valdez on the flat near Mineral Creek. The Scientific and Engineering Task Force concurred in this recommendation. Bedrock ridges along the shore protect the new townsite and also mean that there is no danger of offshore slides. Photo by U.S. Army. Figure 57, U.S. Geological Survey Professional Paper 541. #1:/Alaska Earthquake March 27, 1964/ake00158 ID. Alaska Earthquake no. 158 Alaska Earthquake March 27, 1964. Hodge Building in Whittier. Photo by R. Kachadoorian, April 4, 1964. Figure 12, U.S. Geological Survey Professional Paper 542-B. #1:/Alaska Earthquake March 27, 1964/ake00168 ID. Alaska Earthquake no. 168 Alaska Earthquake March 27, 1964. Railroad yard and warehouse damage at Seward caused by submarine slides, waves and fire. View is west toward the railroad warehouses and docks. Photo by U.S. Army, 1964. Figure 25, U.S. Geological Survey Professional Paper 541. #1:/Alaska Earthquake March 27, 1964/ake00182 ID. Alaska Earthquake no. 182 Alaska Earthquake March 27, 1964. Opening torn by seismic waves in the barrier beach of a large lake along the shore of Iahut Bay on Afognak Island. Channel scour and subsidence of at least 6 feet permit sea water to enter the basin at all stages of tide. Note partially submerged trees along the inner margins of the beach spits and a small new rockslide along the bluff in the background. Photo by Alaska Dept. of Fish and Game, 1964. Figure 20, U.S. Geological Survey Professional Paper 543-D. #1:/Alaska Earthquake March 27, 1964/ake00185 ID. Alaska Earthquake no. 185 Alaska Earthquake March 27, 1964. Deck of the highway bridge at Womens Bay was washed away by seismic sea waves. Photo by U.S. Navy, March 30, 1964. Figure 24, U.S. Geological Survey Professional Paper 543-D. #1:/Alaska Earthquake March 27, 1964/ake00188 ID. Alaska Earthquake no. 188 Alaska Earthquake March 27, 1964. Tree split by ground cracking on the Kenai Lowland. The ground crack, which trends into the split in the tree, cuts across the top of a small knoll in moraine. Photo by H.L. Foster. Figure 5, U.S. Geological Survey Professional Paper 543-F. #1:/Alaska Earthquake March 27, 1964/ake00190 ID. Alaska Earthquake no. 190 Alaska Earthquake March 27, 1964. Vertical displacement on the Kenai Lowland. A scarp more than 200 feet long and 2 to 3 feet high was produced in a thick section of frozen peat and organic silt. The crack at the base of the scarp was 6 inches to 1 foot wide. Another crack intersects the scarp at right angles. This displacement probably resulted from a differential compaction and downslope extension of silty deposits in a muskeg bordering a small lake. Photo by H.L. Foster, 1964. Figure 7, U.S. Geological Survey Professional Paper 543-F. #1:/Alaska Earthquake March 27, 1964/ake00191 ID. Alaska Earthquake no. 191 Alaska Earthquake March 27, 1964. Large ground crack with vertical displacement on the Kenai Lowland. Thick deposits of sand border the left side of the crack. Photo by H.L. Foster, 1964. Figure 10, U.S. Geological Survey Professional Paper 543-F. #1:/Alaska Earthquake March 27, 1964/ake00194 ID. Alaska Earthquake no. 194 Alaska Earthquake March 27, 1964. Collapse pits at Kasilof formed after eruptions of ground water and sand. The pit in the foreground is about 3 feet in diameter. Erupted sand covers the ground. A large crack extends from the pits in the middle background. Photo by H.L. Foster, 1964. Figure 15, U.S. Geological Survey Professional Paper 543-F. #1:/Alaska Earthquake March 27, 1964/ake00196 ID. Alaska Earthquake no. 196 Alaska Earthquake March 27, 1964. Sites of avalanche activity in Eklutna Valley. These talus cones were present before the earthquake but have been enlarged by avalanche activity since the earthquake. The dust clouds were created by the avalanching. Photo by H.L. Foster, 1964. Figure 21, U.S Geological Survey Professional Paper 543-F. #1:/Alaska Earthquake March 27, 1964/ake00197 ID. Alaska Earthquake no. 197 Alaska Earthquake March 27, 1964. Dust cloud in Eklutna Valley caused by avalanche activity. The avalanching has been persistent during the summers since the earthquake. Photo by H.L. Foster, 1964. Figure 22, U.S. Geological Survey Professional Paper 543-F. #1:/Alaska Earthquake March 27, 1964/ake00198 ID. Alaska Earthquake no. 198 Alaska Earthquake March 27, 1964. Crack in gravel outwash in Eklutna Valley. The crack was about 10 inches wide and split a tree stump. The two halves of the stump were offset about 14 inches. Photo by H.L. Foster, 1964. Figure 23, U.S. Geological Survey Professional Paper 543-F. #1:/Alaska Earthquake March 27, 1964/ake00200 ID. Alaska Earthquake no. 200 Alaska Earthquake March 27, 1964. Wall of silt punched up on the emerged bottom of Lake George. The wall was 8 to 24 inches high, 30 feet long, and 6 inches wide. Photo by H.L. Foster, 1964. Figure 26, U.S. Geological Survey Professional Paper 543-F. #1:/Alaska Earthquake March 27, 1964/ake00203 ID. Alaska Earthquake no. 203 Alaska Earthquake March 27, 1964. Cobbles of raised beach resting on truncated bedrock platform at Patton Bay on Montague Island. Photo by M.J. Kirkby, 1965. Figure 20, U.S. Geological Survey Professional Paper 543-H. #1:/Alaska Earthquake March 27, 1964/ake00205 ID. Alaska Earthquake no. 205 Alaska Earthquake March 27, 1964. Measuring the height of the barnacle line at Port Bainbridge in an area of the Kenai Peninsula uplifted 5.7 feet. Photo was taken at 4.4-foot tide stage. Photo by G. Plafker, June 21, 1964. Figure 5, U.S. Geological Survey Professional Paper 543-I. #1:/Alaska Earthquake March 27, 1964/ake00206 ID. Alaska Earthquake no. 206 Alaska Earthquake March 27, 1964. Barnacle line clearly marked by upper limit of light-gray barnacles and desiccated rockweed in dark patches and by the lower growth limit of dark-gray encrusting lichens of the splash zone. Uplift of 3.2 feet in Whale Bay in western Prince William Sound. Photo was taken at 3-foot tide stage. June 22, 1964. Figure 6, U.S. Geological Survey Professional Paper 543-I. #1:/Alaska Earthquake March 27, 1964/ake00208 ID. Alaska Earthquake no. 208 Alaska Earthquake March 27, 1964. The Alaska Railroad depot in Whittier. Wave destroyed the waiting room of the depot. Photo by R. Kachadoorian, 1964. Figure 19, U.S. Geological Survey Professional Paper 542-B. #1:/Alaska Earthquake March 27, 1964/ake00210 ID. Alaska Earthquake no. 210 Alaska Earthquake March 27, 1964. Coast at Cape Suckling uplifted about 13 feet during the earthquake. The difference in elevation between the post- earthquake storm beach, marked by a band of light-colored driftwood, and the pre-earthquake storm beach, which was above the base of the sea cliff, provided a crude measure of the uplift. The smooth area between the upper limits of driftwood and the sea cliff is now a marine terrace, and the former island in the foreground is a stack on its surface. The flat surface on the stack is probably an older marine terrace. Photo taken at about zero tide stage. Photo by G. Plafker, July 24, 1965. Figure 14, U.S. Geological Survey Professional Paper 543-I. #1:/Alaska Earthquake March 27, 1964/ake00212 ID. Alaska Earthquake no. 212 Alaska Earthquake March 27, 1964. Rocky surf-cut platform, a quarter of a mile wide at Cape Cleare on Montague Island, exposed by 26 feet of tectonic uplift. The white band on the upper part of the platform consists mainly of barnacles and calcareous worm tubes. Brown algae, or "kelp," cover much of the surface below the barnacle zone. Photo was taken at about zero tide stage. Photo by G. Plafker, March 31, 1964. Figure 20, U.S. Geological Survey Professional Paper 543-I. #1:/Alaska Earthquake March 27, 1964/ake00213 ID. Alaska Earthquake no. 213 Alaska Earthquake March 27, 1964. Bay-head deposits in MacLeod Harbor on Montague island, deeply incised by stream erosion following about 33 feet of uplift. Arrows indicate the positions of pre- and post-earthquake high-tide shorelines. Photo by G. Plafker, August 6, 1965. Figure 21, U.S. Geological Survey Professional Paper 543-I. #1:/Alaska Earthquake March 27, 1964/ake00216 ID. Alaska Earthquake no. 216 Alaska Earthquake March 27, 1964. Mass of dead starfish in a depression of the uplifted platform at Cape Cleare on Montague Island. Photo by G. Plafker, May 31, 1964. Figure 24, U.S. Geological Survey Professional Paper 543-I. #1:/Alaska Earthquake March 27, 1964/ake00218 ID. Alaska Earthquake no. 218 Alaska Earthquake March 27, 1964. Canneries and fishermen's homes along Orca Inlet in Prince William Sound placed above the reach of most tides due to about 6 feet of uplift. Photo was taken at a 9-foot tide stage, which would have reached beneath the docks prior to the earthquake. Photo by G. Plafker, July 27, 1964. Figure 28, U.S. Geological Survey Professional Paper 543-I. #1:/Alaska Earthquake March 27, 1964/ake00221 ID. Alaska Earthquake no. 221 Alaska Earthquake March 27, 1964. This linear tree-covered beach ridge is one of nine elevated beach ridges near Katalla, east of the Copper River Delta. Uplift of about 9 feet in 1964 shifted the shore line several hundred feet seaward where another beach ridge is in the process of formation. Photo taken near zero tide stage. Photo by G. Plafker, July 28, 1964. Figure 37, U.S. Geological Survey Professional Paper 543-I. #1:/Alaska Earthquake March 27, 1964/ake00222 ID. Alaska Earthquake no. 222 Alaska Earthquake March 27, 1964. Bleached trunks of spruce trees on Latouche Island in Prince William Sound killed by saltwater immersion and partially buried in beach gravel as a result of about 8 feet of submergence below pre- earthquake extreme high-tide level. The locality was exposed by 8 feet of uplift in 1964. Photo by G. Plafker, May 28, 1964. Figure 38, U.S. Geological Survey Professional Paper 543-I. #1:/Alaska Earthquake March 27, 1964/ake00223 ID. Alaska Earthquake no. 223 Alaska Earthquake March 27, 1964. At Cape Suckling, spruce tree stumps (foreground) rooted in a thin layer of peat on a surf-cut bedrock surface about 14 feet below pre-earthquake extreme high water (indicated by the top of the line of driftwood below the present forest edge in the background). Radiocarbon age of a stump near the base of the stadia rod was 710+/-200 years. These stumps were exposed by about 16 feet of uplift in 1964. Photo by G. Plafker, July 24, 1964. Figure 39, U.S. Geological Survey Professional Paper 543-I. #1:/Alaska Earthquake March 27, 1964/ake00225 ID. Alaska Earthquake no. 225 Alaska Earthquake March 27, 1964. Sharp break-in-slope between upper and lower beach faces extends from mid-foreground to mid-center, just to the right of the man. These features, seen here in Kachemak Bay at low tide, are common to many shingle beaches. Photo by K.W. Stanley. Figure 3, U.S. Geological Survey Professional Paper 543-J. #1:/Alaska Earthquake March 27, 1964/ake00230 ID. Alaska Earthquake no. 230 Alaska Earthquake March 27, 1964. Rapid gullying and sloughing caused by headwater stream erosion along the uplifted coast on the Copper River Delta. Photo by U.S. Forest Service. Figure 9, U.S. Geological Survey Professional Paper 543-J. #1:/Alaska Earthquake March 27, 1964/ake00232 ID. Alaska Earthquake no. 232 Alaska Earthquake March 27, 1964. Serious bluff erosion caused by subsidence along the waterfront of the town of Kenai. View is northwestward about 30 days after the earthquake. Photo by K.W. Stanley, 1964. Figure 11, U.S. Geological Survey Professional Paper 543-J. #1:/Alaska Earthquake March 27, 1964/ake00233 ID. Alaska Earthquake no. 233 Alaska Earthquake March 27, 1964. Timber seawall and new groins along the west side of Homer Spit as constructed 3 1/2 months after earthquake-caused subsidence. Photo by K.W. Stanley, 1964. Figure 12, U.S. Geological Survey Professional Paper 543-J. #1:/Alaska Earthquake March 27, 1964/ake00235 ID. Alaska Earthquake no. 235 Alaska Earthquake March 27, 1964. Seawall along the west side of Homer Spit some sixteen months after construction. The bulkhead and one of the groins were completely destroyed during this period owing to their excessive height. Photo by K.W. Stanley. Figure 14, U.S. Geological Survey Professional Paper 543-J. #1:/Alaska Earthquake March 27, 1964/ake00237 ID. Alaska Earthquake no. 237 Alaska Earthquake March 27, 1964. Rockslide avalanche on Sherman Glacier. The source was from the area marked by the fresh scar on Shattered Peak (middle distance). The debris displays flowlines and terminal digitate lobes. No marginal dust layer is present. The steep margin, about 20 meters above the clear ice, is due to more rapid melting of the exposed glacier than the ice protected by the debris. Photo by A. Post, August 25, 1965. Figure 6, U.S. Geological Survey Professional Paper 544-D. #1:/Alaska Earthquake March 27, 1964/ake00240 ID. Alaska Earthquake no. 240 Alaska Earthquake March 27, 1964. Control tower at Anchorage International Airport, collapsed by earthquake shaking. Photo by Federal Aviation Agency. Figure 2, U.S. Geological Survey Professional Paper 545-B. #1:/Alaska Earthquake March 27, 1964/ake00242 ID. Alaska Earthquake no. 242 Alaska Earthquake March 27, 1964. Tectonic subsidence required raising the airstrip at Seldovia. Photo by U.S. Army. Figure 4, U.S. Geological Survey Professional Paper 545-B. #1:/Alaska Earthquake March 27, 1964/ake00243 ID. Alaska Earthquake no. 243 Alaska Earthquake March 27, 1964. Anchorage municipal wharf area shortly after the earthquake at low tide. The main dock was only slightly damaged, but the older Army dock (upper left) was ruined. Vibration and ground fractures damaged some structures in the port area, including the petroleum tank (lower right). Photo by U.S. Army.Figure 5, U.S. Geological Survey Professional Paper 545-B. #1:/Alaska Earthquake March 27, 1964/ake00248 ID. Alaska Earthquake no. 248 Alaska Earthquake March 27, 1964. Old and new Valdez. All waterfront structures and utilities in old Valdez were destroyed (lower center). The new town site (upper left) is protected from slides by a chain of bedrock hills. Photo by U.S. Army. Figure 10, U.S. Geological Survey Professional Paper 545- #1:/Alaska Earthquake March 27, 1964/ake00250 ID. Alaska Earthquake no. 250 Alaska Earthquake March 27, 1964. Sand ridges deposited along a ground crack by eruption of ground water during the earthquake on the Kenai Lowland. A sand ridge on the right intersects the main ridge at nearly right angles Person has right leg in deep crack. Photo by H.L. Foster. Figure 8, U.S. Geological Survey Professional Paper 543-F. #1:/Alaska Earthquake March 27, 1964/ake00260 ID. Alaska Earthquake no. 260 Alaska Earthquake March 27, 1964. Spur west of Shoup Bay in Port Valdez that was overtopped by a local wave traveling from right to left. Trees and branches are broken to an elevation of more than 100 feet above lower low water. Photo by G. Plafker, 1964. Figure 2, U.S. Geological Survey Professional Paper, 542-G. #1:/Alaska Earthquake March 27, 1964/ake00261 ID. Alaska Earthquake no. 261 Alaska Earthquake March 27, 1964. Boulder estimated to weigh 1,700 pounds thrown up 88 feet above the shoreline at Shoup Bay. Photo by G. Plafker, 1964. Figure 4, U.S. Geological Survey Professional Paper 542-G. #1:/Alaska Earthquake March 27, 1964/ake00262 ID. Alaska Earthquake no. 262 Alaska Earthquake March 27, 1964. Chenega village site at the head of Chenega Cove in western Prince William Sound. Lower limits of snow, as shown by arrows, indicate the approximate limits of wave runup. The schoolhouse is circled. Photo by G. Plafker, March 29, 1964. Figure 5, U.S. Geological Survey Professional Paper 542-G. #1:/Alaska Earthquake March 27, 1964/ake00263 ID. Alaska Earthquake no. 263 Alaska Earthquake March 27, 1964. Main part of the Chenega village site, Chenega Cove in western Prince William Sound. Piling in the ground marks the former locations of homes that were swept away by the waves. The schoolhouse on high ground was undamaged. Photo by G. Plafker. Figure 6, U.S. Geological Survey Professional Paper 542-G. #1:/Alaska Earthquake March 27, 1964/ake00264 ID. Alaska Earthquake no. 264 Alaska Earthquake March 27, 1964. Cordova, as it appeared in September, 1966, with port facilities rebuilt to compensate for the 6-foot tectonic uplift of the shoreline. Looking south, end of Eyak Lake and the Copper River Highway (left center) and the Cordova sawmill, destroyed by seismic sea waves (toward upper right). The white angular patch (lower right) is new land made from material dredged from the deepened and enlarged small-boat basin. Photo by G. Plafker. Figure 8, U.S. Geological Survey Professional Paper 542-G. #1:/Alaska Earthquake March 27, 1964/ake00265 ID. Alaska Earthquake no. 265 Alaska Earthquake March 27, 1964. One of numerous ground fissures in fluvioglacial outwash deposits at the Cordova FAA airport station. Fissures such as this one displaced the concrete foundation of the station building in the background and broke underground utility lines throughout the facility area. Photo by G. Plafker. Figure 9, U.S. Geological Survey Professional Paper 542-G. #1:/Alaska Earthquake March 27, 1964/ake00266 ID. Alaska Earthquake no. 266 Alaska Earthquake March 27, 1964. Seismic sea wave damage at the Cordova sawmill along Orca Inlet. Photo by G. Plafker. Figure 10, U.S. Geological Survey Professional Paper 542-G. #1:/Alaska Earthquake March 27, 1964/ake00268 ID. Alaska Earthquake no. 268 Alaska Earthquake March 27, 1964. Wave-damaged structures at the Port Nellie Juan cannery on McClure Bay. A wave, which ran up to the snow trimline along the shore, damaged these structures, washed away the dock, and presumably drowned the three resident caretakers of the cannery. Photo by G. Plafker, April 4, 1964. Figure 14, U.S. Geological Survey Professional Paper 542-G. #1:/Alaska Earthquake March 27, 1964/ake00269 ID. Alaska Earthquake no. 269 Alaska Earthquake March 27, 1964. Shore near the head of Kings Bay swept bare of timber to an altitude of 110 feet by slide-generated local waves. Bare areas of rock on the spur in the right middle distance were scoured clean of soil and muskeg cover. Photo by G. Plafker. Figure 15, U.S. Geological Survey Professional Paper 542-G. #1:/Alaska Earthquake March 27, 1964/ake00270 ID. Alaska Earthquake no. 270 Alaska Earthquake March 27, 1964. Buildings at the Port Oceanic Cannery in western Prince William Sound were damaged by a wave that struck within two to three minutes of the initial shock and had a crest height about even with the cannery floor level. Photo by G. Plafker, April 4, 1964. Figure 18, U.S. Geological Survey Professional Paper 542-G. #1:/Alaska Earthquake March 27, 1964/ake00271 ID. Alaska Earthquake no. 271 Alaska Earthquake March 27, 1964. Typical extensively fissured sand dune on the Copper River Delta. Photo by G. Plafker. Figure 20, U.S. Geological Survey Professional Paper 542-G. #1:/Alaska Earthquake March 27, 1964/ake00272 ID. Alaska Earthquake no. 272 Alaska Earthquake March 27, 1964. Linear fissures and extensive areas of ejected mud (dark) in the tidal flats along the shore of Controller Bay. Photo by G. Plafker. Figure 21, U.S. Geological Survey Professional Paper 542-G. #1:/Alaska Earthquake March 27, 1964/ake00275 ID. Alaska Earthquake no. 275 Alaska Earthquake March 27, 1964. Intensely fissured road at the crest of an elevated beach ridge west of Yakataga. Photo by G. Plafker, 1964. Figure 24, U.S. Geological Survey Professional Paper 542-G. #1:/Alaska Earthquake March 27, 1964/ake00276 ID. Alaska Earthquake no. 276 Alaska Earthquake March 27, 1964. Southwest half of collapsed water tower at Wildwood Station, a U.S. Air Force base on the Kenai Peninsula. Officers' club is in the background. Photo by U.S. Air Force. Figure 25, U.S. Geological Survey Professional Paper 542-G. #1:/Alaska Earthquake March 27, 1964/ake00281 ID. Alaska Earthquake no. 281 Alaska Earthquake March 27, 1964. Intake structure for the Eklutna Powerplant and the intricate networks of cracks caused by the earthquake along the shore of Eklutna Lake. Photo by M.H. Logan, U.S. Bureau of Reclamation. Figure 6, U.S. Geological Survey Professional Paper 545-A. #1:/Alaska Earthquake March 27, 1964/ake00286 ID. Alaska Earthquake no. 286 Alaska Earthquake March 27, 1964. Looking down on vertical crack 0.01 to 0.015 foot wide along pre-existing joints in a hard graywacke bed on Montague Island. Photo by G. Plafker. Figure 8, U.S. Geological Survey Professional Paper 543-G. #1:/Alaska Earthquake March 27, 1964/ake00287 ID. Alaska Earthquake no. 287 Alaska Earthquake March 27, 1964. Buried gasline ruptured by earthquake forces in tension. Photo by W.J. Stump. Figure 14 (upper photo), U.S. Geological Survey Professional Paper 545-B. #1:/Alaska Earthquake March 27, 1964/ake00288 ID. Alaska Earthquake no. 288 Alaska Earthquake March 27, 1964. Buried gasline ruptured by earthquake forces in compression. Photo by W.J. Stump. Figure 14 (lower photo), U.S. Geological Survey Professional Paper 545-B. #1:/Alaska Earthquake March 27, 1964/ake00289 ID. Alaska Earthquake no. 289 Alaska Earthquake March 27, 1964. Area washed over by the backfill wave at Lawing. The wave traveled from left to right, breaking down and debarking the trees. The brush in the background was bent to the right. The only branches left on the spruce tree beside the man are on the lee side. The pile of gravel in the left foreground was probably frozen at the time it was carried ashore by the wave. Photo by D.S. McCulloch. Figure 14, U.S. Geological Survey Professional Paper 543-A. #1:/Alaska Earthquake March 27, 1964/ake00290 ID. Alaska Earthquake no. 290 Alaska Earthquake March 27, 1964. Large block of lake ice to which sediment was frozen when carried ashore by the wave at Lawing. Photo by D.S. McCulloch. Figure 15, U.S. Geological Survey Professional Paper 543-A. #1:/Alaska Earthquake March 27, 1964/ake00291 ID. Alaska Earthquake no. 291 Alaska Earthquake March 27, 1964. Large block of bedded sandy pebble gravel carried ashore by the wave at Lawing. The slide scarp forms the boundary of the beach to the right. Debarked trees are shown in the background. Photo by D.S. McCulloch. Figure 16, U.S. Geological Survey Professional Paper 543-A. #1:/Alaska Earthquake March 27, 1964/ake00294 ID. Alaska Earthquake no. 294 Alaska Earthquake March 27, 1964. Tension on the Rocky Creek railroad bridge relieved by shearing the bolts in an angle bar and pulling the track apart. Photo by D.S. McCulloch. Figure 26, U.S. Geological Survey Professional Paper 543-A. #1:/Alaska Earthquake March 27, 1964/ake00295 ID. Alaska Earthquake no. 295 Alaska Earthquake March 27, 1964. Tension on the Lakeview Delta railroad bridge pulled guard timbers apart and split a tie. Photo by D.S. McCulloch. Figure 27, U.S. Geological Survey Professional Paper 543-A. #1:/Alaska Earthquake March 27, 1964/ake00298 ID. Alaska Earthquake no. 298 Alaska Earthquake March 27, 1964. Slump block having some rotation and horizontal separation at the edge of Rocky Creek Delta. Photo by D.S. McCulloch. Figure 32, U.S. Geological Survey Professional Paper 543-A. #1:/Alaska Earthquake March 27, 1964/ake00299 ID. Alaska Earthquake no. 299 Alaska Earthquake March 27, 1964. Ground fracture bounding the railroad line of Rocky Creek Delta just north of the slide that carried away part of the rail line. Photo by D.S. McCulloch. Figure 33, U.S. Geological Survey Professional Paper 543-A. #1:/Alaska Earthquake March 27, 1964/ake00300 ID. Alaska Earthquake no. 300 Alaska Earthquake March 27, 1964. Destruction of Columbia Lumber Co. in Whittier. View is north. Photo by U.S. Army, March 28, 1964. Figure 7, U.S. Geological Survey Professional Paper 542-B. #1:/Alaska Earthquake March 27, 1964/ake00302 ID. Alaska Earthquake no. 302 Alaska Earthquake March 27, 1964. Million Dollar Bridge on the Copper River Highway; no. 4 span off no. 4 pier. View is southwest. Photo by R. Kachadoorian. Figure 36, U.S. Geological Survey Professional Paper 545-C. #1:/Alaska Earthquake March 27, 1964/ake00303 ID. Alaska Earthquake no. 303 Alaska Earthquake March 27, 1964. Collapsed no. 4 span and horizontal fracture in no. 4 pier of the Million Dollar Bridge on the Copper River Highway. View is northeast. Photo by R. Kachadoorian. Figure 37, U.S. Geological Survey Professional Paper 545-C. #1:/Alaska Earthquake March 27, 1964/ake00309 ID. Alaska Earthquake no. 309 Alaska Earthquake March 27, 1964. Fractures and mud spouts in unconsolidated deposits and fractures and pressure ridges in lake ice produced by the earthquake in tidal flat alluvium south of Bering Glacier. Photo by A. Grantz. Figure 5-B, U.S. Geological Survey Circular 491. #1:/Alaska Earthquake March 27, 1964/ake00312 ID. Alaska Earthquake no. 312 Alaska Earthquake March 27, 1964.4.5-foot drop of land surface on the Homer Spit. The top of the casing is now 2.5 feet higher above ground level due to the compaction of alluvium. Photo by A. Grantz. Figure 6, U.S. Geological Survey Circular 491. #1:/Alaska Earthquake March 27, 1964/ake00317 ID. Alaska Earthquake no. 317 Alaska Earthquake March 27, 1964. Damage to Kodiak by waves. Photo by A. Grantz. Figure 13 (left photo), U.S. Geological Survey Circular 491. #1:/Alaska Earthquake March 27, 1964/ake00319 ID. Alaska Earthquake no. 319 Alaska Earthquake March 27, 1964. Effects of large sea waves. Wave trim-line on north-facing bluffs of Culross Island. Photo by A. Grantz, 1964. Figure 14-A, U.S. Geological Survey Circular 491. #1:/Alaska Earthquake March 27, 1964/ake00320 ID. Alaska Earthquake no. 320 Alaska Earthquake March 27, 1964. Damage to railroad and highway bridge areas on Twentymile River. Photo by A. Grantz. Figure 14-B, U.S. Geological Survey Circular 491. #1:/Alaska Earthquake March 27, 1964/ake00324 ID. Alaska Earthquake no. 324 Alaska Earthquake March 27, 1964. Destructive landslides in Anchorage: east part of Turnagain slide. Photo by A. Grantz. Figure 17-C, U.S. Geological Survey Circular 491. #1:/Alaska Earthquake March 27, 1964/ake00325 ID. Alaska Earthquake no. 325 Alaska Earthquake March 27, 1964. Destructive landslides in Anchorage: west part of Turnagain slide. Photo by A. Grantz. Figure 17-D, U.S. Geological Survey Circular 491. #1:/Alaska Earthquake March 27, 1964/ake00327 ID. Alaska Earthquake no. 327 Alaska Earthquake March 27, 1964. Destructive landslides and damage in Anchorage: graben at the head of the L Street landslide. Photo by A. Grantz. Figure 18-B, U.S. Geological Survey Circular 491. #1:/Alaska Earthquake March 27, 1964/ake00328 ID. Alaska Earthquake no. 328 Alaska Earthquake March 27, 1964. Destructive landslides and damage in Anchorage: compressional ridge formed at the toe of the L Street landslide. Photo by A. Grantz. Figure 18-C, U.S. Geological Survey Circular 491. #1:/Alaska Earthquake March 27, 1964/ake00329 ID. Alaska Earthquake no. 329 Alaska Earthquake March 27, 1964. Destructive landslides and damage in Anchorage: destruction by seismic shock of a partially complete concrete structure on unconsolidated deposits. Photo by A. Grantz. Figure 18-D, U.S. eological Survey Circular 491. #1:/Alaska Earthquake March 27, 1964/ake00336 ID. Alaska Earthquake no. 336 Alaska Earthquake March 27, 1964. Graben at the head of the L Street landslide in Anchorage. 1964. #1:/Alaska Earthquake March 27, 1964/ake00349 ID. Alaska Earthquake no. 349 Alaska Earthquake March 27, 1964. Dark strip on the house shows maximum height reached by waves in Seward, south of the lagoon area. Photo by U.S. Army, 1964. #1:/Alaska Earthquake March 27, 1964/ake00350 ID. Alaska Earthquake no. 350 Alaska Earthquake March 27, 1964. Earthquake-damaged tanks of the Standard Oil Company in Seward. 1964. #1:/Alaska Earthquake March 27, 1964/ake00351 ID. Alaska Earthquake no. 351 Alaska Earthquake March 27, 1964. Wave action moved this 120 ton locomotive 130 feet inland and 5 feet vertically. Photo by R.W. Lemke, 1964. #1:/Alaska Earthquake March 27, 1964/ake00352 ID. Alaska Earthquake no. 352 Alaska Earthquake March 27, 1964. Sand boil area near Birch Street in Forest Acres subdivision in Seward. The thickness of the ejected sand is indicated by the depth that the truck tire is submerged. The house in the background is one of a few wooden buildings heavily damaged solely by strong ground motion during the earthquake. May 1, 1964. #1:/Alaska Earthquake March 27, 1964/ake00353 ID. Alaska Earthquake no. 353 Alaska Earthquake March 27, 1964. Twisted rails and overturned tank cars attest to the force of the waves that inundated the Seward area. 1964. #1:/Alaska Earthquake March 27, 1964/ake00356 ID. Alaska Earthquake no. 356 Alaska Earthquake March 27, 1964. Seward one day after the earthquake. Photo by U.S. Army Corps of Engineers; mosaicked by U.S. Geological Survey. Figure 2 (lower photo), U.S. Geological Survey Professional Paper 542-E. #1:/Alaska Earthquake March 27, 1964/ake00357 ID. Alaska Earthquake no. 357 Alaska Earthquake March 27, 1964. Extent of ground fracture and earthquake damage on the southern part of the Seward waterfront. Photo by U.S. Army, March, 1964; mosaicked by U.S. Geological Survey. Figure 3, U.S. Geological Survey Professional Paper 542-E. #1:/Alaska Earthquake March 27, 1964/ake00362 ID. Alaska Earthquake no. 362 Alaska Earthquake March 27, 1964. Debris avalanche on the peninsula between Ugak and Kiliuda Bays. A slide of Tertiary rocks from the 1,500-foot-high peak at upper right flowed into the uninhabited valley below at about 300-foot altitude where it spread out as a debris lobe roughly 1,500 feet across. The narrow streak of light-colored debris in the lower right corner is part of the slide mass that overflowed the near flank of the landslide scar. 1964. Plate 2, U.S. Geological Survey Professional Paper 543-D. #1:/Alaska Earthquake March 27, 1964/ake00366 ID. Alaska Earthquake no. 366 Alaska Earthquake March 27, 1964. Seismic shock damage in Anchorage to the Four Seasons Apartment Building which was under construction on unconsolidated material. There were no casualties; five workers left the top (fifth) floor 35 minutes before the earthquake. 1964. #1:/Alaska Earthquake March 27, 1964/ake00367 ID. Alaska Earthquake no. 367 Alaska Earthquake March 27, 1964. Wreckage of Government Hill Elementary School in Anchorage, as viewed from the playground, looking west. Note undamaged water tower in left background. 1964. #1:/Alaska Earthquake March 27, 1964/ake00368 ID. Alaska Earthquake no. 368 Alaska Earthquake March 27, 1964. Earthquake-demolished home in Turnagain Heights in Anchorage. 1964. #1:/Alaska Earthquake March 27, 1964/ake00369 ID. Alaska Earthquake no. 369 Alaska Earthquake March 27, 1964. Earthquake-damaged houses in Turnagain Heights in Anchorage. 1964. #1:/Alaska Earthquake March 27, 1964/ake00371 ID. Alaska Earthquake no. 371 Alaska Earthquake March 27, 1964. House wrecked by pressure ridge at the L Street landslide at 8th Avenue in Anchorage. 1964. #1:/Alaska Earthquake March 27, 1964/ake00372 ID. Alaska Earthquake no. 372 Alaska Earthquake March 27, 1964. Earthquake-damaged building in slump(?) of L Street in Anchorage. 1964. #1:/Alaska Earthquake March 27, 1964/ake00373 ID. Alaska Earthquake no. 373 Alaska Earthquake March 27, 1964. Apartment house sheared at the graben of the L Street landslide in Anchorage. 1964. #1:/Zion National Park/anr00247 ID. Anderson, R. 247 Zion National Park, Utah. Ice fall on Zion Canyon wall 10 or more miles above Virgin River. A small water fall dropping from the top of the cliff at this point freezes on the wall, and blocks of ice drop at intervals with a loud roar. 1910. #1:/Professional paper 613/asr00001 ID. Ash, S.R. 1 Small pueblo made of sections of petrified logs in Petrified Forest National Park. The pueblo, now called "Agate House", was built and occupied by American Indians about 600 yhears ao. Recently, it was partially restored. Apache County, Arizona. n.d. Published as figure 3 in U.S. Geological Survey. Professional paper 613-D. 1969. #1:/Professional paper 613/asr00002 ID. Ash, S.R. 2 Southest wall of Arroyo del Cobre. Minas de Pedro copper mines are near the top of the picture in the ledge of light-colored sandstone which is about 400 feet above the floor of the canyon. Numberous fossilized leaves occur in the roof-shales of these mines, and John S. Newberry probably collected fossils from them in 1859. New Mexico. n.d. Published as figure 5 in U.S. Geological Survey. Professional paper 613-D. 1969. #1:/Professional paper 613/asr00003 ID. Ash, S.R. 3 Northward view of Fort Wingate. Old Fort Wingateis in right foreground. One of the large petrified logs now in the Smithsonian Institution was collected in 1879 from the low mesa shown near the right of the picture. Petrified wood is still abundant on the mesa top. The mesa is underlain by the Sonsela sandstone Bed, which divides gthe Petrified Forest Member of the Chinle Formation into two parts in theis area. McKinley County, New Mexico. n.d. Published as figure 6 in U.S. Geological Survey. Professional paper 613-D. 1969. #1:/Professional paper 613/asr00004 ID. Ash, S.R. 4 East was of Arroyo del Cobre. The adits of the Las Minas Jimmie copper mines are in the ledge of light-colored sandstone near the center of the picture. They are about 100 feet above the floor of the canyon and are probably the old copper mines describ ed by Professor Frank Knowlton, from which he collected fossil leaves in 1889. He also collected fossilized wood from a bed of shale overlying the bed of sandstone. New Mexico. n.d. Published as figure 7 in U.S. Geological Survey. Professional paper 613-D. 1969. #1:/Professional paper 613/asr00005 ID. Ash, S.R. 5 Upper part of the Shinarump Member of the Chinle Formation, 2 miles south of Fort Wingate. The contact between the lower and upper parts of the Shinarump is at the base of the ledge-forming crossbedded unit. The contact between he lower red member and the Shinarump Member is obscured by the trees, McKinley County, New Mexico, n.d. Published as figure 10 in U.S. Geological Survey. Professional paper 613-D. 1969. #1:/Professional paper 613/asr00006 ID. Ash, S.R. 6 Large channel-type deposit near the base of the lower red member of the Chinle Formation, exposed in a roadcut 2 miles south of Fort Wingate on State Highway 400. USGS paleobotany loclity 10060 is near the base and beneath the channel. McKinley County, New Mexico. n.d. Published as figure 10 in U.S. Geological Survey. Professional paper 613-D. 1969. #1:/Professional paper 613/asr00007 ID. Ash, S.R. 7 Badland topography that has formed on the lower red member of the Chinle Formation 1 mile south of Fort Wingate. The light-colored rock near the center of the picture apparently is a channel-type deposit. USGS paleobotany locality 10061 is in this distinctive unit. McKinley County, New Mexico. n.d. Published as figure 12 in U.S. Geological Survey. Professional paper 613-D. 1969. #1:/Professional paper 613/asr00008 ID. Ash, S.R. 8 Fossils. Todites Fragilis Daugherty, Chinle Formation (Upper Triassic) Fort Wingate Area, New Mexico. n.d. Published in U.S. Geological Survey. Professional paper 613-D. 1969. #1:/Fossils/asr00009 ID. Ash, S.R. 9 Fossils. Cynepteris Lasiophora Ash, n. gen., n. sp. found in the Chinle Formation (Upper Triassic) in the Fort Wingate area, New Mexico. n.d. Published in U.S. Geological Survey. Professional paper 613-D. 1969. #1:/Fossils/asr00010 ID. Ash, S.R. 10 Fossils. Cynepteris Lasiophora Ash, n. gen., n. sp. found in the Chinle Formation (Upper Triassic) in the Fort Wingate area, New Mexico. n.d. Published in U.S. Geological Survey. Professional paper 613-D. 1969. #1:/Fossils/asr00011 ID. Ash, S.R. 11 Fossils. Wingatea Plumosa (Daugherty) Ash, n.gen., and Clathropteris Walkeri Daughterty. Chinle Formation (Upper Triassic), Fort Wingate area. New Mexico. n.d. Published in U.S. Geological Survey. Professional paper 613-D. 1969. #1:/Fossils/asr00012 ID. Ash, S.R. 12 Fossils. Cladophlebis Daughertyi Ash, n.sp. Chinle Formation (Upper Triassic), Fort Wingate area. New Mexico. n.d. Published in U.S. Geological Survey. Professional paper 613-D. 1969. #1:/Petrified Forest National Park/baa00338 ID. Baker, A.A. 338 Petrified Forest National Park, Arizona. Petrified tree trunk in the Chinle Formation. 1928. #1:/Alaska Glaciers/baf00026 ID. Buddington, A.F. 26 Alaska Glaciers. Foot of Baird Glacier, which is north of Thomas Bay in the Coast Mountains. Circa 1923. #1:/Alaska Glaciers/baf00047 ID. Buddington, A.F. 47 Alaska Glaciers. East toward the Coast Mountains and Baird Glacier, from Cascade Creek. Baird Glacier is north of Thomas Bay. Circa 1923. #1:/Beekley A.L. Collection-Coryell Coal Mine/bal00017 ID. Beekly, A.L. 17 Coryell Coal Mine, looking northwest, Newcastle. Garfield County, Colorado. 1909. #1:/Beekley A.L. Collection-Experimental Cement Plant/bal00018 ID. Beekly, A.L. 18 Experimental Cement Plant, at Newcastle. Garfield County, Colorado. 1909. #1:/Beekley A.L. Collection-South Canyon Mines/bal00021 ID. Beekly, A.L. 21 South Canyon Mines, in South Canon. Garfield County, Colorado. 1911. #1:/Beekley A.L. Collection-Spring Gulch mining camp/bal00051 ID. Beekly, A.L. 51 Spring Gulch mining camp. Forms a panorama with photo 52. Pitkin County, Colorado. 1909. #1:/Beekley A.L. Collection-Redstone Coking Plants/bal00068 ID. Beekly, A.L. 68 Looking down at Redstone coking plants. Pitkin County, Colorado. 1909. #1:/Beekley A.L. Collection-Coalbasin Mine/bal00076 ID. Beekly, A.L. 76 Coalbasin mine, abandoned October 15, 1909. Pitkin County, Colorado. 1909. #1:/Beekley A.L. Collection/bal00187 ID. Beekly, A.L. 187 Coalmont, open cut in foreground, Park Range in background, looking northwest. Jackson County, Colorado. 1911. Plate 11,in U.S. Geological Survey. Bulletin 596. 1915. #1:/Bryant B.H. Collection/bbh00546 ID. Bryant, B.H. 546 Cirque moraines at 3,260 - 3,290 meter altitude northeast of Hunter Peak. Pitkin and Gunnison Counties, Colorado. ca. 1965. #1:/Cumberland Gap National Historical Park/bc003348 ID. Butts, C. 3348 Cumberland Gap National Historical Park, Kentucky. Cumberland Gap, viewed from the top of the Pinnacle, looking southeast into Virginia and Tennessee. 1933. Photos bc003348 through bc003352 form a panorama. #1:/Cumberland Gap National Historical Park/bc003349 ID. Butts, C. 3349 Cumberland Gap National Historical Park, Kentucky. Cumberland Gap, viewed from the top of the Pinnacle, looking southeast into Virginia and Tennessee. 1933. Photos bc003348 through bc003352 form a panorama. #1:/Cumberland Gap National Historical Park/bc003350 ID. Butts, C. 3350 Cumberland Gap National Historical Park, Kentucky. Cumberland Gap, viewed from the top of the Pinnacle, looking southeast into Virginia and Tennessee. 1933. Photos bc003348 through bc003352 form a panorama. #1:/Cumberland Gap National Historical Park/bc003351 ID. Butts, C. 3351 Cumberland Gap National Historical Park, Kentucky. Cumberland Gap, viewed from the top of the Pinnacle, looking southeast into Virginia and Tennessee. 1933. Photos bc003348 through bc003352 form a panorama. #1:/Cumberland Gap National Historical Park/bc003352 ID. Butts, C. 3352 Cumberland Gap National Historical Park, Kentucky. Cumberland Gap, viewed from the top of the Pinnacle, looking southeast into Virginia and Tennessee. 1933. Photos bc003348 through bc003352 form a panorama. #1:/Crater Lake National Park/bcd00001 ID. Bue, C.D. 1 Crater Lake National Park, Oregon. Crater Lake in winter. Water level is about 6,175 feet above sea level. The crater walls, rising as much as 2,000 feet above the water, are remnants of a mountain more than 12,000 feet high. Wizard Island, in the middle ground, is the result of volcanic activity that continued after the main peak had collapsed. Photo courtesy of the Oregon State Highway Department. Figure 1, U.S. Geological Survey Circular 476. #1:/Bromfield C.S. Collection-San Bernardo Mill-San Bernardo Mine/bcs00008 ID. Bromfield, C.S. 8 Looking west toward San Bernardo mill and mine. Dumps mark general course of the San Bernardo vein. The summit of San Bernardo Mountain is capped by Tertiary Telluride Conglomerate. Conspicuous outcrop of north shoulder of mountain (at right) is of hornfelsed Mancos Shale cut, by an arm of the Ophir stock. Outcrop to right of the lower dump is granodiorite porphyry of Ames sill. Wilson Mountains Primitive area, San Miguel County, Colorado. ca. 1968. Figure 8 in U.S. Geological Survey. Bulletin 1353-A. 1972. #1:/Bromfield C.S. Collection/bcs00009 ID. Bromfield, C.S. 9 Lonely vigil of abandoned mine cabin, Rock of Ages mine. Gladstone Peak (13,913 feet), in center background, and the northeast shoulder of Mount Wilson on the left are carved from the Wilson Peak stock. In right middle ground are long talus sloped which descend into Navajo Basin. Wilson Mountains Primitive Area. Delores and San Miguel Counties, Colorado. ca. 1968. Figure 10 in U.S. Geological Survey. Bulletin 1353-A. 1972. #1:/Brobst D.A. Collection/bda00008 ID. Brobst, D.A. 8ct Rockslide near Bakersville. Metamorphic rocks dipping toward road fell after extensive spring rains. Mitchell County, North Carolina. 1952. #1:/Alaska/bee00014 ID. Brabb, E.E. 14ct Alaska. Looking down a rock glacier near Slender Lake northeast of Cordova in the Chugach Mountains. The rock is diorite. 1959. #1:/Alaska/bee00050 ID. Brabb, E.E. 50ct Alaska. Looking south across Granite Creek at an alluvial fan and valley glacier on the Kenai Peninsula. 1959. #1:/Alaska/bee00054 ID. Brabb, E.E. 54ct Alaska. Ross Green Lake and moraines north of Cape Yakataga. 1959. #1:/Alaska/bee00071 ID. Brabb, E.E. 71ct Alaska. Dike and schist on the Tana River. 1959. #1:/Alaska/bee00293 ID. Brabb, E.E. 293ct Alaska. Graded beds in the Kandik formation along the Kandik River in NW 1/4 sec. 26, T. 12 N., R. 32 E. August 1960. #1:/Alaska/bee00493 ID. Brabb, E.E. 493ct Alaska. Shale, chert and limestone at Takoma Bluff along the Yukon River at the mouth of Takoma Creek. September 1961. #1:/Alaska/bee00495 ID. Brabb, E.E. 495ct Alaska. Devonian(?) shale, chert, and limestone at Takoma Bluff along the Yukon River at the mouth of Takoma Creek. September 1961. #1:/Alaska/bee00532 ID. Brabb, E.E. 532ct Alaska. Black shale in Woodchopper Volcanics, looking north, in sec. 24, T. 7 N., R. 20 E., Charley River (B-6) quadrangle. August 1960. #1:/Alaska/bee00567 ID. Brabb, E.E. 567ct Alaska. Circle volcanics "bedded gabbro" in Circle (D-1) quadrangle. September 1961. #1:/Alaska/bee00577 ID. Brabb, E.E. 577ct Alaska. Red and green Mississippian(?) slate in sec. 30, T. 9 N., R. 19 E., Charley River (C-6) quadrangle. August 1960. #1:/Alaska/bee00946 ID. Brabb, E.E. 946ct Alaska. Marble on the Charley River. August 1961. #1:/Alaska/bee00947 ID. Brabb, E.E. 947ct Alaska. Marble and schist on the Charley River. August 1961. #1:/Alaska/bee00956 ID. Brabb, E.E. 956ct Alaska. Marble and schist on the Charley River. August 1961. #1:/Alaska/bee00982 ID. Brabb, E.E. 982ct Alaska. Pillow basalts (spilitic basalt and lapilli tuff) near Webber Creek south-southeast of Circle in the Yukon-Tanana Highlands. September 1961. #1:/Alaska/bee01211 ID. Brabb, E.E. 1211ct Alaska. Devonian limestone on the Salmon Fork Black River. July 1961. #1:/Alaska/bee01216 ID. Brabb, E.E. 1216ct Alaska. Devonian dolomite and chert on the Salmon Fork Black River. July 1961. See also photos bee01217 and photo bee01218. #1:/Alaska/bee01217 ID. Brabb, E.E. 1217ct Alaska. Devonian dolomite and chert on the Salmon Fork Black River. July 1961. See also photos bee01216 and bee01218. #1:/Alaska/bee01218 ID. Brabb, E.E. 1218ct Alaska. Devonian dolomite and chert on the Salmon Fork Black River. July 1961. See also photos bee01216 and bee01217. #1:/Alaska/bee01250 ID. Brabb, E.E. 1250ct Alaska. Tertiary basalt on the Salmon Fork Black River. July 1961. #1:/Illinois and Michigan Canal National Heritage Corridor/bef00454 ID. Burchard, E.F. 454 Illinois & Michigan Canal National Heritage Corridor, Illinois. Quarry of the Western Stone Company in Joliet, Illinois, showing workings on three levels. #1:/Burchard E.F. Collection-Emmett Fluorspar Mine/bef00575 ID. Burchard, E.F. 575 Emmett fluorspar mine, showing ore chute. Jamestown, Boulder County, Colorado. n.d. #1:/Burchard E.F. Collection/bef00579 ID. Burchard, E.F. 579 About 500 feet of middle part Colorado Yule Marble Company's quarry. Marble. Gunnison County, Colorado. n.d. #1:/Burchard E.F. Collection/bef00580 ID. Burchard, E.F. 580 Two upper levels of Colorado Yule Marble Company's quarry, showing overhang with channeling machine at back of tunnel. Marble, Gunnison County, Colorado. n.d. #1:/Burchard E.F. Collection-Gypsum Quarry and Mill/bef00713 ID. Burchard, E.F. 713 Panorama Nephi Plaster Co., Gypsum quarry and mill. Nephi, Juab County, Utah. #1:/Burchard E.F. Collection-Gypsum Quarry and Mill/bef00714 ID. Burchard, E.F. 714 Panorama Nephi Plaster Co., Gypsum quarry and mill. Nephi, Juab County, Utah.n.d. #1:/Burchard E.F. Collection-Gypsum Quarry and Mill/bef00715 ID. Burchard, E.F. 715 Traction engine and three wagons by which plaster is hauled 5 miles from gypsum mill of Utah Consolidated Plaster Co. to railroad. Levan, Juab County, Utah. n.d. #1:/Burchard E.F. Collection/bef00716 ID. Burchard, E.F. 716 Utah Consolidated Plaster Company mill, Levan, Juab County, Utah.n.d. #1:/Burchard E.F. Collection-Gypsum Quarry and Mill/bef00717 ID. Burchard, E.F. 717 of Utah Consolidated Plaster Company, Gypsum quarry on right side of Chicken Creek canyon. Loading bin and tramway trestle to mill. Levan, Juab County, Utah. n.d. #1:/Burchard E.F. Collection-Ogden Portland Cement Company/bef00719 ID. Burchard, E.F. 719 Marl deposit of Ogden Portland Cement Company, bottom of Great Salt Lake. Shows relative depth of deposit and material being loaded with "orange peel dipper". Baker Spur, Box Elder County, Utah.n.d. #1:/Burchard E.F. Collection-Ogden Portland Cement Company/bef00721 ID. Burchard, E.F. 721 Marl excavation (bed of Great Salt Lake) Ogden Portland Cement Company showing "orange peel dredge" and train carrying marl, and cement mill in distance. Baker's Spur, Box Elder County, Utah. n.d. #1:/Burchard E.F. Collection-Ogden Portland Cement Company/bef00722 ID. Burchard, E.F. 722 Ogden Portland Cement Company's cement mill at Baker's Spur. Box Elder County, Utah. #1:/Burchard E.F. Collection-Colorado Portland Cement Company/bef00731 ID. Burchard, E.F. 731 Form a panorama of gypsum quarry of Colorado Portland Cement Company, Coaldale. Fremont County, Colorado.n.d. #1:/Burchard E.F. Collection-Colorado Portland Cement Company/bef00732 ID. Burchard, E.F. 732 Form a panorama of gypsum quarry of Colorado Portland Cement Company, Coaldale. Fremont County, Colorado.n.d. #1:/Burchard E.F. Collection-Colorado Portland Cement Company/bef00734 ID. Burchard, E.F. 734 Colorado Portland Cement and Wall Plaster plants of Portland Cement Company in center, shale quarry seen on upper left horizon, Portland. Fremont County, Colorado. n.d. #1:/Burchard E.F. Collection-Columbia Steel Corporation Mine/bef01248 ID. Burchard, E.F. 1248 View northwestward along strike of iron ore lens showing glory hole openings at mine of Columbia Steel Corporation. Iron Springs, Iron County, Utah. July 27, 1924. #1:/Burchard E.F. Collection-Columbia Steel Corporation Mine/bef01251 ID. Burchard, E.F. 1251 Loading trestle at iron mine of Columbia Steel Corporation. Iron Springs, Iron County, Utah. July 28, 1924. #1:/Burchard E.F. Collection-Utah Iron Ore Corporation/bef01252 ID. Burchard, E.F. 1252 Panorama with photo 1253 of stripping operations on iron ore deposit, at west end of Desert Mount at mine of Utah Iron Ore Corporation, Three miles southwest of Iron Springs. Iron County, Utah. July 28, 1924. #1:/Burchard E.F. Collection/bef01316 ID. Burchard, E.F. 1316 Openings and dumps made in connection with mining fluorspar on Violet Ray vein of Blue Jay properties, Jamestown. Boulder County, Colorado. 1926. #1:/Burchard E.F. Collection-C.F.I. Company Mill/bef01324 ID. Burchard, E.F. 1324 C.F.I. Company, mill at Wagon Wheel Gap Hot Springs. Mineral County, Colorado. 1926. #1:/Burchard E.F. Collection-C.F.I. Company Mill/bef01325 ID. Burchard, E.F. 1325 Mill and mine openings of C.F.I. Company fluorspar mine looking east from opposite side of Goose Creek valley. The fluorspar vein outcrops approximately in a line from the mill to the highest opening on top of the hill. One hot spring flows into Goose Creek just below the mill and another issues near the bathhouse, which is the large white building in the left foreground, Wagon Wheel Gap Hot Springs. Mineral County, Colorado. 1926. #1:/Burchard E.F. Collection/bef01326 ID. Burchard, E.F. 1326 Near forks of gulch showing characteristic volcanic rocks and an old mill on the amethyst vein, North Creed. Mineral County, Colorado. 1926. #1:/Burchard E.F. Collection-C.F.I. Company Orient Iron Mine/bef01329 ID. Burchard, E.F. 1329 Showing dumps from workings of C.F.I. Company Orient iron mine, ledge of nearly vertical rock at left is quartzite of Paleozoic age. Front of Sangre de Cristo Mountains between Orient Canyon on the right and Black Canyon on the left. #1:/Burchard E.F. Collection-C.F.I. Company/bef01332 ID. Burchard, E.F. 1332 Formed as a panorama of the Orient iron mine of the C.F.I. Company looking north-northeast and northeast. Saguache County, Colorado. July 30, 1926. #1:/Burchard E.F. Collection-C.F.I. Company Orient Iron Mine/bef01334 ID. Burchard, E.F. 1334 North 30 degrees west along mine openings on fissure in ore bearing limestone. The tramway runs in the portal on the number 5 level Orient mine. Saguache County, Colorado. July 30, 1926. #1:/Burchard E.F. Collection-Colorado Fluorspar Corporation Mine/bef01342 ID. Burchard, E.F. 1342 Mill and dumps of Colorado Fluorspar Corporation mine. The 200-foot level emerges in the upper part of the mill. The open cut shown in No. 1326 is in the upper left portion of this view, North Gate. Jackson County, Colorado. 1926. #1:/Burchard E.F. Collection-Roaring Fork Plaster Company/bef0728a ID. Burchard, E.F. 728a Form a panorama of gypsum quarry of Roaring Fork Plaster Company. Shows both left and right hand openings on opposite side of quarry, with cable drum in middle. Ruedi. Eagle County, Colorado.n.d. #1:/Burchard E.F. Collection-Roaring Fork Plaster Company/bef0728b ID. Burchard, E.F. 728b Form a panorama of gypsum quarry of Roaring Fork Plaster Company. Shows both left and right hand openings on opposite side of quarry, with cable drum in middle. Ruedi. Eagle County, Colorado.n.d. #1:/Burchard E.F. Collection-Roaring Fork Plaster Company/bef0728e ID. Burchard, E.F. 728e Mill of Roaring Fork Plaster Company, viewed from quarry, Ruedi. Eagle County, Colorado. n.d. #1:/United States-Professional paper 60/bes00011 ID. Bastin, E.S. 11 Land-tied island, Spruce Head Island, Penobscott Bay. Hancock County, Maine, August 1904, plate 140-B in U.S. Geological Survey. Professional paper 60. 1908. #1:/Bastin E.S. Collection/bes00199 ID. Bastin, E.S. 199 Gold dredge on Swan River near Breckenridge. Summit County, Colorado. July 1909. #1:/Bastin E.S. Collection/bes00201 ID. Bastin, E.S. 201 Abandoned hydraulic elevator, Breckenridge. Summit County, Colorado. July 1909. *** need a unique Id, for these b/w and for color prints. #1:/Bastin E.S. Collection-Alice Mine and Mill/bes00217 ID. Bastin, E.S. 217 Alice Mine and Mill, Alice, looking southwest, Central City Quadrangle. Gilpin County, Colorado. 1911. #1:/Bastin E.S. Collection-Mines of Russell Gulch/bes00218 ID. Bastin, E.S. 218 Mines of Russell Gulch, looking southwest, Central City Quadrangle. Gilpin County, Colorado. 1911. #1:/Bastin E.S. Collection-Chase Mine/bes00235 ID. Bastin, E.S. 235 Chase mine and up Willis Gulch, looking southwest, Central City Quadrangle. Gilpin County, Colorado. 1911. #1:/Bastin E.S. Collection/bes00238 ID. Bastin, E.S. 238 Looking south, Blackhawk. Gilpin County, Colorado. 1911. #1:/Alaska/bff00003 ID. Barnes, F.F. 3ct Alaska. Peat over Kenai beds between Fritz Creek and Stone Steps at Kachemak Bay on the southwest coast of the Kenai Peninsula. September 7, 1948. #1:/Alaska Glaciers/bff00115 ID. Barnes, F.F. 115 Alaska Glaciers. Learnard Glacier, which is northwest of Whittier in the Chugach Mountains, viewed from the foot of Portage Pass Trail. July 12, 1939. #1:/Alaska Glaciers/bff00117 ID. Barnes, F.F. 117 Alaska Glaciers. Learnard Glacier, Passage Canal, a wester arm of Prince William Sound. Wells district, Alaska gulf region, Alaska. July 14, 1939. #1:/Alaska Glaciers/bff00122 ID. Barnes, F.F. 122 Alaska Glaciers. Northeast lobe of Portage Glacier, from the crest of the pass to the northeast. Portage Glacier is on the Kenai Peninsula west of Whittier in the Chugach Mountains. July 28, 1939. Photos bff00122 and bff00123 form a panorama. #1:/Alaska Glaciers/bff00123 ID. Barnes, F.F. 123 Alaska Glaciers. Northeast lobe of Portage Glacier, from the crest of the pass to the northeast. Portage Glacier is on the Kenai Peninsula west of Whittier in the Chugach Mountains. July 28, 1939. Photos bff00122 and bff00123 form a panorama. #1:/Alaska Glaciers/bff00124 ID. Barnes, F.F. 124 Alaska Glaciers. West from Portage shoulder down Portage Valley, showing lower end of Portage Glacier, Portage Lake, Turnagain Shoulder (right), and the mouth of Placer Valley (right foreground). Portage Glacier is on the Kenai Peninsula west of Whittier in the Chugach Mountains. Plate 14-B, U.S Geological Survey Bulletin 926-D. #1:/Alaska Glaciers/bff00127 ID. Barnes, F.F. 126 Alaska Glaciers. View southeast across northeast lobe of Portage Glacier. Wells district, Alaska gulf region, Alaska. August 11, 1939. #1:/Alaska Glaciers/bff00136 ID. Barnes, F.F. 136 Alaska Glaciers. Whittier Glacier, which is on the Kenai Peninsula south of Whittier in the Chugach Mountains, viewed from Passage Canal. August 15, 1939. #1:/Alaska Glaciers/bff00144 ID. Barnes, F.F. 144 Alaska Glaciers. View west across summit of Portage Glacier Shoulder. Passage Canal, a western arm of Price William Sound. Panorama with Photo No. bff00143. Wells district, Alaska gulf region, Alaska. August 16, 1939. #1:/Alaska Glaciers/bff00145 ID. Barnes, F.F. 145 Alaska Glaciers. View west across summit of Portage Glacier Shoulder. Passage Canal, a western arm of Price William Sound. Panorama with Photo No. bff00143. Wells district, Alaska gulf region, Alaska. August 16, 1939. #1:/Alaska Glaciers/bff00148 ID. Barnes, F.F. 148 Alaska Glaciers. View west across summit of Portage Glacier Shoulder at "L" line. Passage Canal, a western arm of Price William Sound. Wells district, Alaska gulf region, Alaska. August 16, 1939. #1:/Alaska Glaciers/bff00149 ID. Barnes, F.F. 149 Alaska Glaciers. Head of Portage Glacier, from summit of Portage Shoulder. Wells district, Alaska gulf region, Alaska. August 16, 1939. Published as left portion of plate 18 in U.S. Geological Survey. Bulletin 926-D. 1943. #1:/Alaska Glaciers/bff00150 ID. Barnes, F.F. 150 Alaska Glaciers. Head of Portage Glacier, from summit of Portage Shoulder. Wells district, Alaska gulf region, Alaska. August 16, 1939. Published as right portion of plate 18 in U.S. Geological Survey. Bulletin 926-D. 1943. #1:/Alaska Glaciers/bff00182 ID. Barnes, F.F. 182 Alaska Glaciers. View northeast across tip of Portage Glacier toward Portage Shoulder. Wells district, Alaska gulf region, Alaska. August 16, 1939. #1:/Alaska Glaciers/bff00183 ID. Barnes, F.F. 183 Alaska Glaciers. Site of west portal of proposed tunnel through Turnagain Shoulder, showing snowslides. Portage Valley. This site is located on the Kenai Peninsula west of Whittier in the Chugach Mountains. Wells district, Alaska gulf region, Alaska. April 18, 1940. #1:/Alaska Glaciers/bff00194 ID. Barnes, F.F. 194 Alaska Glaciers. Site of west portal tunnel through Turnagain Shoulder. Portage Valley. The site of located on the Kenai Peninsula west of Whittier in the Chugach Mountains. Wells district, Alaska gulf region, Alaska. April 24, 1940. #1:/Alaska Glaciers/bff00195 ID. Barnes, F.F. 195 Alaska Glaciers. Lower part of Portage Glacier, which is on the Kenai Peninsula west of Whittier in the Chugach Mountains, viewed from Turnagain Shoulder. April 24, 1940. #1:/Alaska Glaciers/bff00197 ID. Barnes, F.F. 197 Alaska Glaciers. Lower part of Portage Glacier, which is on the Kenai Peninsula west of Whittier in the Chugach Mountains, viewed from Turnagain Shoulder. April 24, 1940. Plate 17-B, U.S. Geological Survey Bulletin 926-D. #1:/Alaska Glaciers/bff00259 ID. Barnes, F.F. 259 Alaska Glaciers. Looking up Bear Creek at Portage Glacier. This site is located on the Kenai Peninsula west of Whittier in the Chugach Mountains. Photo by R.J. Wier. Wells district, Alaska gulf region, Alaska. 1914. #1:/Alaska Glaciers/bff00260 ID. Barnes, F.F. 260 Alaska Glaciers. Portage Glacier. This site is located on the Kenai Peninsula west of Whittier in the Chugach Mountains. Photo by R.J. Wier. Wells district, Alaska gulf region, Alaska. 1914. #1:/Alaska Glaciers/bff00261 ID. Barnes, F.F. 261 Alaska Glaciers. Portage Glacier. This site is located on the Kenai Peninsula west of Whittier in the Chugach Mountains. Photo by R.J. Wier. Wells district, Alaska gulf region, Alaska. 1914. #1:/Fossils/bge00002 ID. Becraft, G.E. 2 Fossils. Metasequoia occidentalis (Newberry) Chaney, fossil from tuffaceous sandstones of the Gerome andesite. Found in the Northwest Uranium Mine in Stevens County, Washington. 1957. #1:/Grand Canyon National Park/bgh00001 ID. Billingsley, G.H. 1 Grand Canyon National Park, Arizona. Type section of Surprise Canyon Formation, longitude 113 degrees 048 minutes, latitude 36 degrees 000 minutes, 1.6 kilometers west of the Colorado River (mile 263) and 2.4 kilometers southwest of the mouth of Tincanebits Canyon. Circa 1980. #1:/Ozark National Scenic Riverways/bjh00001 ID. Barks, J.H. 1 Ozark National Scenic Riverways, Missouri. Canoeists on the Current River. Photo courtesy of U.S. National Park Service, 1973. Frontispiece, U.S. Geological Survey Water-Supply Paper 2048. #1:/Boutwell J.M. Collection-Daly Mines 1 and 2/bjm00028 ID. Boutwell, J.M. 28 Daly mines Nos. 1 and 2, and Massachusetts mines. Park City, Summit County, Utah. 1905. #1:/Boutwell J.M. Collection-Daly West Mine/bjm00034 ID. Boutwell, J.M. 34 Looking down on Daly West mine, Park City. Summit County, Utah. 1905. #1:/Boutwell J.M. Collection-Silver King Mine/bjm00047 ID. Boutwell, J.M. 47 Head of big stope first set below 900 feet. Wall of galena in gash vein, Silver King mine. Park City district, Summit County, Utah. 1905. #1:/Boutwell J.M. Collection-Silver King Mine/bjm00048 ID. Boutwell, J.M. 48 Silver King mine, 1000 feet level N.E. Strong fracture zone in calcareous carbonaceous gray and blue lime. Dip 73 degrees N.W. Park City district, Summit County, Utah. 1905. #1:/Boutwell J.M. Collection-Silver King Mine/bjm00051 ID. Boutwell, J.M. 51 Silver King mine, 1100 feet level, west at 17(?) cross cut. Showing gold ledge with sheeted walls. Park City district, Summit County, Utah. 1905. #1:/Boutwell J.M. Collection-Daly West Mine/bjm00055 ID. Boutwell, J.M. 55 Daly West mine, 900 feet above 1400 feet level, west cross cut south contact of Ontario quartzite with overlying limestone, showing banded gouge contact overlying decomposed limestone and massive gray carbonaceous lime and cross slip. Park City district, Summit County, Utah. 1905. #1:/Boutwell J.M. Collection-Daly West Mine/bjm00056 ID. Boutwell, J.M. 56 Daly West mine, 1400 feet level, west end stope 40-50 feet above level showing foot wall, pay streak of galena pyrite, some chalcopyrite, slight resin zinc, and silicious gangue. Fissure zone is 30 feet wide. Park City district, Summit County, Utah. 1905. #1:/Boutwell J.M. Collection/bjm00061 ID. Boutwell, J.M. 61 Highland Boy spur, between limestone, and head of Utah mine. Salt Lake County, Utah. 1902 #1:/Boutwell J.M. Collection-Highland Boy Cyanide Mill/bjm00062 ID. Boutwell, J.M. 62 Quartzite footwall of Yampa limestone on north slope of Sap Gulch. Looking northward over old Highland Boy cyanide mill. Carr Fork, Salt Lake County, Utah. 1902. Plate 43-B, in U.S. Geological Survey. Professional paper 38. 1905. #1:/Boutwell J.M. Collection/bjm00063 ID. Boutwell, J.M. 63 Boston Consolidated Tunnels, Salt Lake County, Utah. 1902. #1:/Boutwell J.M. Collection-Commercial Mine/bjm00064 ID. Boutwell, J.M. 64 Commercial Mine. Salt Lake County, Utah. 1902. #1:/Boutwell J.M. Collection/bjm00065 ID. Boutwell, J.M. 65 Highland Boy tunnels, upper terminal of aerial tramway, and old cyanide mill. View is west, up Carr Fork (left) and Sap Gulch. Salt Lake County, Utah. 1902. Plate 43-A in U.S. Geological Survey. Professional paper 38. 1905. #1:/Boutwell J.M. Collection/bjm00066 ID. Boutwell, J.M. 66 Lower terminal of Highland Boy tramway. Salt Lake County, Utah. 1902. #1:/Boutwell J.M. Collection-Highland Boy Smelter/bjm00067 ID. Boutwell, J.M. 67 Highland Boy Smelter. Salt Lake County, Utah. 1902. #1:/Boutwell J.M. Collection-Commercial Smelter/bjm00068 ID. Boutwell, J.M. 68 Commercial's smelter. Salt Lake County, Utah. 1902. #1:/Boutwell J.M. Collection/bjm00071 ID. Boutwell, J.M. 71 Auriferous creek gravels in Bingham Canyon below upper Bingham, view is north-northwest. Salt Lake County, Utah. 1902. Plate 49-B in U.S. Geological Survey. Professional paper 38. 1905. #1:/Boutwell J.M. Collection/bjm00073 ID. Boutwell, J.M. 73 Argonaut open cut in auriferous bench gravels; view is south-southeast up Bingham Canyon. Salt Lake County, Utah. 1902. Plate 49-A in U.S. Geological Survey. Professional Paper 38. 1905. #1:/Boutwell J.M. Collection-Jordan Mill/bjm00104 ID. Boutwell, J.M. 104 Open cuts above Niagara Mill, looking south. Salt Lake County, Utah. n.d. #1:/Boutwell J.M. Collection-Jordan Mill/bjm00105 ID. Boutwell, J.M. 105 Head of Bingham Canyon, looking west from above Old Jordan Mill. Salt Lake County, Utah. n.d. #1:/Boutwell J.M. Collection-Jordan Mill/bjm00106 ID. Boutwell, J.M. 106 Old Jordan Mill, Condor fissure, Bully Boy fissure from above mill, looking south. Utah. n.d. #1:/Boutwell J.M. Collection-Ontario Mine/bjm00138 ID. Boutwell, J.M. 138 Mines in upper Ontario Canyon, Ontario mine in middle ground, shaft No. 2 at left, shaft No. 3 at right, Wabash shaft in center. In background Naildriver shaft at right, New York shaft at left. Looking southeast. Summit County, Utah. 1902. #1:/Boutwell J.M. Collection/bjm00141 ID. Boutwell, J.M. 141 Ontario fracture zone of 1,700 foot level, between well-defined walls of limestone and porphyry. Looking southwest. Summit County, Utah. 1902. #1:/Boutwell J.M. Collection/bjm00184 ID. Boutwell, J.M. 184 Looking down on workings of Ontario Mine behind Ontario office and bunkhouse. Parley's Park shaft can be seen on the skyline. View is east-southeast. Park city District. Summit County, Utah. ca. 1902. #1:/Boutwell J.M. Collection-Ontario Mine/bjm00185 ID. Boutwell, J.M. 185 Looking toward dumps of the Ontario mineshafts Nos. 2 and 3(left). Mine buildings in foreground. View is north-northeast. Park City District. Summit County, Utah. ca. 1902. #1:/Boutwell J.M. Collection-Ontario Mine/bjm00189 ID. Boutwell, J.M. 189 Ontario vein near surface, showing ferruginous breccia under clean hanging wall; 20 feet above Union level, Ontario mine. Hammer for scale. Park City District. Summit County, Utah. ca. 1902. #1:/Boutwell J.M. Collection-Ontario Mine/bjm00190 ID. Boutwell, J.M. 190 Pay-streak of pyrite, zinc blend, chalcopyrite and gray copper, 4 feet wide in fissure near base of Ontario lode, between quartzite walls; 90 feet above 1500 level, Ontario mine. Hammer for scale; view framed by mine timbers. Park City District. Summit County, Utah. ca. 1902. #1:/Boutwell J.M. Collection-Ontario Mine/bjm00191 ID. Boutwell, J.M. 191 Barren fissure in quartzite in main Ontario fracture zone; 50 feet above 1500 level, Ontario mine. Lamp for scale. Park city District. Summit County, Utah. ca. 1902. #1:/Boutwell J.M. Collection-Ontario Mine/bjm00192 ID. Boutwell, J.M. 192 Banded black and white coarsely crystalline marble; looking west; first mouth of drift on first hanging wall vein east of No. 2 shaft; 1500 level, Ontario mine. Miner's lamp for scale. Park City District. Summit County, Utah. ca. 1902. #1:/Boutwell J.M. Collection-Ontario Mine/bjm00193 ID. Boutwell, J.M. 193 Fissure in quartzite breccia in hanging wall portion of Ontario lode; Looking southwest, 1500 level, Ontario mine. Hammer for scale. Park City District. Summit County, Utah. ca. 1902. #1:/Boutwell J.M. Collection-Ontario Mine/bjm00194 ID. Boutwell, J.M. 194 Face of ore make up of lead, zinc, cuprite, malachite, and pyrite. Ontario vein, 1500 level, looking northeast, Ontario mine. Hammer for scale. Park City District. Summit County, Utah. ca. 1902. #1:/Boutwell J.M. Collection-Silver King Mine/bjm00196 ID. Boutwell, J.M. 196 Forms a panorama with photos 197,198. Surface improvements at the Silver King mine, including shaft house, workshops, bunk and boarding house, sampler, mill and aerial tramway. View is west-northwest. Park City District. Summit County, Utah. ca. 1902. #1:/Boutwell J.M. Collection-Silver King Mine/bjm00197 ID. Boutwell, J.M. 197 Forms a panorama with photos 196,198. Surface improvements at the Silver King mine, including shaft house, workshops, bunk and boarding house, sampler, mill and aerial tramway. View is west-northwest. Park City District. Summit County, Utah. ca. 1902. #1:/Boutwell J.M. Collection-Silver King Mine/bjm00198 ID. Boutwell, J.M. 198 Forms a panorama with photos 196 and 197. Surface improvements at the Silver King mine, including shaft house, workshops, bunk and boarding house, sampler, mill and aerial tramway. View is west-northwest. Park City District. Summit County, Utah. ca. 1902. #1:/Boutwell J.M. Collection-Diamond-Nimrod Mines/bjm00200 ID. Boutwell, J.M. 200 Form a panorama with photo 201.Quince, Daly Judge, Daly West, and Diamond-Nimrod mines. View is southwest. Park City District. Summit County, Utah. ca. 1902. #1:/Boutwell J.M. Collection-Diamond-Nimrod Mines/bjm00201 ID. Boutwell, J.M. 201 Form a panorama with photo 200 of Quince, Daly Judge, Daly West, and Diamond-Nimrod mines. View is southwest. Park City District. Summit County, Utah. ca. 1902. #1:/Boutwell J.M. Collection-Diamond-Nimrod Mines-Daily West Mine-Daly Judge Mine/bjm00202 ID. Boutwell, J.M. 202 Form a panorama with photo 202 of Daly West, Daly Judge, and Diamond-Nimrod mines, and Crescent-fault bluff. View is southwest. Park City District. Summit, Utah. ca. 1902. #1:/Boutwell J.M. Collection-Diamond-Nimrod Mines-Daily West Mine-Daly Judge Mine/bjm00203 ID. Boutwell, J.M. 203 Form a panorama with photo 202 of Daly West, Daly Judge, and Diamond-Nimrod mines, and Crescent-fault bluff. View is southwest. Park City District. Summit, Utah. ca. 1902. #1:/Boutwell J.M. Collection-Daly West Mine/bjm00204 ID. Boutwell, J.M. 204 Sulphide ore exposed in Daly West vein, under black shale hanging wall, and over crushed quartzite. Located on east face, Big Cave on fissure, 1300 level, Daly West mine; looking northeast. Park City District. Summit County, Utah. ca. 1902. #1:/Boutwell J.M. Collection-Daly West Mine/bjm00205 ID. Boutwell, J.M. 205 Face of milling lead ore with silver, iron and zinc associated in siliceous gangue under carbonaceous shale hanging wall in the Daly West vein, west stopes, 60 feet above 1400 level; looking northeast, Daly West mine. Park City District. Summit County, Utah. ca. 1902. #1:/Boutwell J.M. Collection-Daly West Mine/bjm00208 ID. Boutwell, J.M. 208 Four-foot bed of sulphide replacement argentiferous lead ore between calcareous sandstone hanging wall and Daly West sandstone foot wall. Looking south-southeast, 900 level west, Daly West mine. Hammer for scale. Park City district. Summit County Utah. ca. 1902. #1:/Boutwell J.M. Collection-Anchor Mine/bjm00210 ID. Boutwell, J.M. 210 Metamorphic Ridge. Anchor Mine, showing glacial amphitheatre, with kames and moraines. View is southwest from Daly West Spur. Park City District. Summit County, Utah. ca. 1902. #1:/Burrows J.S. Collection-Four Points Mine/bjs00149 ID. Burrows, J.S. 149 Coal tipple at Four Points Mine, Kenilworth, Carbon County, Utah. 1908. #1:/Burrows J.S. Collection-Four Points Mine/bjs00150 ID. Burrows, J.S. 150 Two sections of incline at Four Points Mine, Kenilworth, Carbon County, Utah. 1908. #1:/Burrows J.S. Collection-Four Points Mine/bjs00152 ID. Burrows, J.S. 152 Mine entrance - Four Points Mine showing 20 feet of coal. Kenilworth, Carbon County, Utah. 1908. #1:/Burrows J.S. Collection/bjs00155 ID. Burrows, J.S. 155 Mine Plant at Dacono, Weld County, Colorado. January 6, 1910. #1:/Yellowstone National Park/bke00001 ID. Bargar, K.E. 1 Yellowstone National Park, Wyoming. Step-like travertine terraces in the Mammoth Hot Springs area. Several large flat travertine deposits lie between Prospect Terrace on the right and Opal and Hymen Terraces on the left. Photo by D.E. White. Figure 1, U.S. Geological Survey Bulletin 1444. #1:/Yellowstone National Park/bke00002 ID. Bargar, K.E. 2 Yellowstone National Park, Wyoming. The Cretaceous sedimentary rocks of Mount Everts are capped in the right half of the figure by Pleistocene volcanic rocks erupted from the Yellowstone caldera. Main Terrace in the Mammoth Hot Springs area (Jupiter Springs on the left, the blue pool of Main Spring in the center, and Canary Springs, marked by vapor plumes, on the right) is the light-colored travertine terrace in the middle of the figure. Foreground shows part of tree- studded Prospect Terrace. Figure 3, U.S. Geological Survey Bulletin 1444. #1:/Yellowstone National Park/bke00003 ID. Bargar, K.E. 3 Yellowstone National Park, Wyoming. Steeply dipping fractures cutting horizontally bedded travertine deposits of Highland Terrace in the Mammoth Hot Springs area. Numerous channels have been carved along the fractures by thermal water flowing toward the surface. Pencil in the center is about 15 centimeters long. Figure 4, U.S. Geological Survey Bulletin 1444. #1:/Yellowstone National Park/bke00004 ID. Bargar, K.E. 4 Yellowstone National Park, Wyoming. Porous travertine from drill hole Y10 in the Mammoth Hot Springs area. Specimen is from 73 centimeters below the surface. Figure 5, U.S. Geological Survey Bulletin 1444. #1:/Yellowstone National Park/bke00005 ID. Bargar, K.E. 5 Yellowstone National Park, Wyoming. Dense vertically-banded travertine from the Mammoth Hot Springs area. Specimen lines an old channel in a partially collapsed fissure ridge of the Highland Terrace area. Coin is 1.8 centimeters across. Figure 6, U.S. Geological Survey Bulletin 1444. #1:/Bargar K.E. Collection-Yellowstone National Park/bke00006 ID. Bargar, K.E. 6 Dense travertine of drill core. Specimenis from 14.4 m below the surface, drill hole Y10. Channel is partly filled by younger lightercolored travertine. Yellowstone National Park, Wyoming. n.d. Published as figure 7 in U. S. Geological Survey. Bulletin 1444. 1978. #1:/Yellowstone National Park/bke00007 ID. Bargar, K.E. 7 Yellowstone National Park, Wyoming. Well-developed terracettes at Minerva Spring in the Mammoth Hot Springs area. Figure 9, U.S. Geological Survey Bulletin 1444. #1:/Yellowstone National Park/bke00008 ID. Bargar, K.E. 8 Yellowstone National Park, Wyoming. Terracettes and overhanging terracette deposits of New Highland Spring in the Mammoth Hot Springs area. Figure 11, U.S. Geological Survey Bulletin 1444. #1:/Bargar K.E. Collection-Yellowstone National Park/bke00009 ID. Bargar, K.E. 9 Collapse feature in the Highland Terrace area. The approximately 1.2-m-deep depression is one of the a series of collapsed areas that from a linear trend parallel to the group of tension fractures in the southwest corner of the Mammoth Hot Springs area. Yellowstone National Park, Wyoming. n.d. Published as figure 12 in U. S. Geological Survey. Bulletin 1444. 1978. #1:/Yellowstone National Park/bke00010 ID. Bargar, K.E. 10 Yellowstone National Park, Wyoming. Terminus of a fissure ridge about 3 meters high located just north of Devils Kitchen Springs in the Mammoth Hot Springs area. Figure 14, U.S. Geological Survey Bulletin 1444. #1:/Yellowstone National Park/bke00011 ID. Bargar, K.E. 11 Yellowstone National Park, Wyoming. Fissure ridge along part of the northern border of Main Terrace in the Mammoth Hot Springs area. The ridge forms a barrier to later travertine deposits of the Main Terrace that are beginning to cover and obscure the ridge. A fissure extends along most of the top of the ridge. Figure 15, U.S. Geological Survey Bulletin 1444. #1:/Yellowstone National Park/bke00012 ID. Bargar, K.E. 12 Yellowstone National Park, Wyoming. The small cone-shaped deposit behind and to the right of Orange Spring Mound is Tangerine Spring in the Mammoth Hot Springs area. Figure 16, U.S. Geological Survey Bulletin 1444. #1:/Yellowstone National Park/bke00014 ID. Bargar, K.E. 14 Yellowstone National Park, Wyoming. One of the grottos along the northwest flank of White Elephant Back Terrace in the Mammoth Hot Springs area. Figure 18, U.S. Geological Survey Bulletin 1444. #1:/Yellowstone National Park/bke00015 ID. Bargar, K.E. 15 Yellowstone National Park, Wyoming. Calcite "ice" now partly collapsed. The deposit is on the surface of the former pool of spring MHS-12 in the Mammoth Hot Springs area. Figure 19, U.S. Geological Survey Bulletin 1444. #1:/Bargar K.E. Collection-Yellowstone National Park/bke00016 ID. Bargar, K.E. 16 Texture produced by fossil microorganisms in travertine from Pinyon Terrace. Yellowstone National Park, Wyoming. n.d. Published as figure 20 in U. S. Geological Survey. Bulletin 1444. 1978. #1:/Yellowstone National Park/bke00018 ID. Bargar, K.E. 18 Yellowstone National Park, Wyoming. Hot River in the Mammoth Hot Springs area. Hot carbonated spring water undercut the old horizontally bedded travertine deposits until individual blocks collapsed under their own weight. Direction of flow is toward the viewer. Figure 23, U.S. Geological Survey Bulletin 1444. #1:/Bergendahl M.H. Collection/bmh00004 ID. Bergendahl, M.H. 4 Boudinage structure in banded gneiss, Tenmile Range. Felsic material between ends of boudins is very coarse grained. Summit County, Colorado. ca. 1963. #1:/Nicaragua Earthquakes December 1972/brd00001 ID. Brown, R.D. Jr. 1 Nicaragua Earthquakes December 1972, Managua. Central Managua, looking south. Fault D passes obliquely across the photograph and through the Central Bank which is heavily damaged. The adjacent Bank of the Americas is essentially undamaged. Many of the smaller structures that remain standing are badly damaged and will be razed. Extensive open areas in the foreground are where structures have collapsed due to the earthquake and/or fire. Much of the debris in the right foreground was already cleared away. #1:/Nicaragua Earthquakes December 1972/brd00002 ID. Brown, R.D. Jr. 2 Nicaragua Earthquakes December 1972, Managua. One of many waterline breaks along the earthquake fractures. #1:/Nicaragua Earthquakes December 1972/brd00009 ID. Brown, R.D. Jr. 9 Nicaragua Earthquakes December 1972, Managua. Compressional rupture and lateral buckle of the north-south trending curb along the fault zone B. #1:/Nicaragua Earthquakes December 1972/brd00011 ID. Brown, R.D. Jr. 11 Nicaragua Earthquakes December 1972, Managua. Collapsed three-story reinforced concrete Customs House office building. This structure is astride fault B at a locality where the aggregate sinistral slip is 25.9 centimeters. #1:/Nicaragua Earthquakes December 1972/brd00014 ID. Brown, R.D. Jr. 14 Nicaragua Earthquakes December 1972, Managua. Swath of destroyed buildings along fault C. Fault trace is through the center of the photograph. Open fractures that trend north-south in the street pavement are in echelon to the fault. Structure on the right is typical of tarquezal (wood and adobe) construction that was extensively damaged. #1:/Bohannon R.G. Collection/brg00001 ID. Bohannon, R.G. 1cp Example of parallel, continuous bedding within sandstone of the Thumb Member, Horse Spring Formation. An outcrop in Callville wash, north of Callville Bay, shows undulatory bedding. Photo case on the left is 50 cm square. Lake Mead area. Clark County, Nevada. ca. 1975. Same as black and white figure 9-B in U.S. Geological Survey. Professional paper 1259. 1984. #1:/Yellowstone National Park/brg00002 ID. Baker, R.G. 2 Yellowstone National Park, Wyoming. Shorelines above the Southeast Arm of Yellowstone Lake. Lower benches are 110, 90, 60, and 25 feet above the lake; higher benches are kame terraces or rock surfaces. View is northeast. Circa 1966. Figure 3, U.S. Geological Survey Professional Paper 729-E. #1:/Baker, R.G. Collection-Yellowstone National Park/brg00007 ID. Baker R.G. 7 Late Quaternary vegetation history of the Yellowstone Lake basin. Yellowstone National Park, Wyoming. n.d. Published as plates 1-10 in U. S. Geological Survey. Professional paper 729-E. 1976. #1:/Baker, R.G. Collection-Yellowstone National Park/brg00008 ID. Baker R.G. 8 Late Quaternary vegetation history of the Yellowstone Lake basin. Yellowstone National Park, Wyoming. n.d. Published as plates 1-10 in U. S. Geological Survey. Professional paper 729-E. 1976. #1:/Yellowstone National Park/brg00009 ID. Baker, R.G. 9 Yellowstone National Park, Wyoming. Fossil pollen from Buckbean fen core, magnified x 1,054. Plate 3, U.S. Geological Survey Professional Paper 729-E. #1:/Yellowstone National Park/brg00010 ID. Baker, R.G. 10 Yellowstone National Park, Wyoming. Fossil pollen and alga from Buckbean fen core, magnified x 1,054. Plate 4, U.S. Geological Survey Professional Paper 729-E. #1:/Yellowstone National Park/brg00011 ID. Baker, R.G. 11 Yellowstone National Park, Wyoming. Fossil and modern conifer needles, magnified x 11. Plate 5, U.S. Geological Survey Professional Paper 729-E. #1:/Yellowstone National Park/brg00012 ID. Baker, R.G. 12 Yellowstone National Park, Wyoming. Fossil and modern fruits, scales, seeds, perianth, and bracts, magnified x 11. Plate 6, U.S. Geological Survey Professional Paper 729-E. #1:/Yellowstone National Park/brg00013 ID. Baker, R.G. 13 Yellowstone National Park, Wyoming. Fossil and modern fruits, perigynia, and fruit-stones, magnified x 11. Plate 7, U.S. Geological Survey Professional Paper 729-E. #1:/Yellowstone National Park/brg00014 ID. Baker, R.G. 14 Yellowstone National Park, Wyoming. Fossil perigynia, fruits, and seeds from Buckbean fen core and modern perigynia, fruits, and seeds, magnified x 16. Plate 9, U.S. Geological Survey Professional Paper 729-E. #1:/Yellowstone National Park/brg00015 ID. Baker, R.G. 15 Yellowstone National Park, Wyoming. Fossil and modern fruits and seeds, magnified approximately x 27. Plate 10, U.S. Geological Survey Professional Paper 729-E. #1:/Yellowstone National Park/brg00016 ID. Baker, R.G. 16 Yellowstone National Park, Wyoming. Fossil and modern seeds and fruits, magnified x 17. Plate 8, U.S. Geological Survey Professional Paper 729-E. #1:/Big Bend National Park/brl00017 ID. Brown, R.L. 17ct Big Bend National Park, Texas. Mouth of Boquillas Canyon at sunset. 1970. #1:/Big Bend National Park/brl00018 ID. Brown, R.L. 18ct Big Bend National Park, Texas. Sierra del Carmen at sunset. 1970. #1:/Big Bend National Park/brl00019 ID. Brown, R.L. 19ct Big Bend National Park, Texas. Burro Mesa. 1970. #1:/Big Bend National Park/brl00021 ID. Brown, R.L. 21ct Big Bend National Park, Texas. Chisos Mountains. 1970. #1:/Big Bend National Park/brl00022 ID. Brown, R.L. 22ct Big Bend National Park, Texas. Kit Mountain and Castolon Peak, viewed from Alamo Creek. 1970. #1:/Big Bend National Park/brl00023 ID. Brown, R.L. 23ct Big Bend National Park, Texas. Tule Mountain and Burro Mesa. 1970. #1:/Big Bend National Park/brl00024 ID. Brown, R.L. 24ct Big Bend National Park, Texas. Goat Mountain, Kit Mountain, Sierra Ponce, Santa Elena Canyon, and Mesa de Anila. 1970. #1:/Big Bend National Park/brl00025 ID. Brown, R.L. 25ct Big Bend National Park, Texas. Mule Ear Peaks. 1970. #1:/Big Bend National Park/brl00026 ID. Brown, R.L. 26ct Big Bend National Park, Texas. Castolon Peak. 1970. #1:/Big Bend National Park/brl00027 ID. Brown, R.L. 27ct Big Bend National Park, Texas. Goat Mountain. 1970. #1:/Big Bend National Park/brl00029 ID. Brown, R.L. 29ct Big Bend National Park, Texas. Chinos Mountains and Casa Grande Peak. 1970. #1:/Big Bend National Park/brl00030 ID. Brown, R.L. 30ct Big Bend National Park, Texas. Chinos Mountains. 1970. #1:/Big Bend National Park/brl00031 ID. Brown, R.L. 31ct Big Bend National Park, Texas. Croton Peak. 1970. #1:/Big Bend National Park/brl00032 ID. Brown, R.L. 32ct Big Bend National Park, Texas. Mule Ears Peak. 1970. #1:/Big Bend National Park/brl00033 ID. Brown, R.L. 33ct Big Bend National Park, Texas. Rio Grande River and Santa Elena Canyon. 1970. #1:/Big Bend National Park/brl00034 ID. Brown, R.L. 34ct Big Bend National Park, Texas. Rattlesnake Mountains. 1970. #1:/Big Bend National Park/brl00035 ID. Brown, R.L. 35ct Big Bend National Park, Texas. Rio Grande River, Sierra Ponce, Santa Elena Canyon, and Mesa de Anguila. 1970. #1:/Big Bend National Park/brl00036 ID. Brown, R.L. 36ct Big Bend National Park, Texas. Mouth of Santa Elena Canyon. 1970. #1:/Big Bend National Park/brl00037 ID. Brown, R.L. 37ct Big Bend National Park, Texas. Mariscal Mine, active during the turn of the century for the extraction of cinnabar (quicksilver ore), produced 894 flasks of refined quicksilver from July 1917 to May 1919. 1970. #1:/Big Bend National Park/brl00038 ID. Brown, R.L. 38ct Big Bend National Park, Texas. Laccolith at Fresno Canyon, north of Lajitas. 1970. #1:/Big Bend National Park/brl00040 ID. Brown, R.L. 40ct Big Bend National Park, Texas. Mariscal Mountain and overturned anticlinal fold. 1970. #1:/Big Bend National Park/brl00041 ID. Brown, R.L. 41Ct Big Bend National Park, Texas. Elephant Tusk and the Chisos Mountains. 1970. #1:/Big Bend National Park/brl00042 ID. Brown, R.L. 42ct Big Bend National Park, Texas. Sierra San Vicente, one of the classical geological structures of the Big Bend, an anticlinal fold at the end of the Mesozoic era. 1970. #1:/Big Bend National Park/brl00044 ID. Brown, R.L. 44ct Big Bend National Park, Texas. Rio Grande River and Sierra San Vicente. 1970. #1:/Big Bend National Park/brl00045 ID. Brown, R.L. 45ct Big Bend National Park, Texas. Sierra San Vicente. 1970. #1:/Big Bend National Park/brl00047 ID. Brown, R.L. 47ct Big Bend National Park, Texas. Burro Mesa. 1970. #1:/Big Bend National Park/brl00048 ID. Brown, R.L. 48ct Big Bend National Park, Texas. Punta de la Sierra and Sierra Quemada. 1970. #1:/Big Bend National Park/brl00053 ID. Brown, R.L. 53Ct Big Bend National Park, Texas. Willow Mountain north of Study Butte. 1970. #1:/Big Bend National Park/brl00055 ID. Brown, R.L. 55ct Big Bend National Park, Texas. Santa Ana Mesa. 1970. #1:/Yellowstone National Park/brw00025 ID. Brown, R.W. 25 Yellowstone National Park, Wyoming. Petrified forest locality on Specimen Ridge, south of Lamar River. The forest is of Eocene age. 1938. #1:/Grand Teton National Park/brw00036 ID. Bayley, R.W. 36 Grand Teton National Park, Wyoming. Grand Tetons. #1:/Big Thompson Canyon Flood/btc00003 ID. Big Thompson Canyon Flood 3ct Big Thompson Canyon Flood, Colorado. Deeply scoured alluvium along Dry Gulch and a tributary fan. Dry Gulch crested here at about 4,460 cubic feet per second. Note the evidence of over-bank flow on the alluvial fan. Photo by W.R. Hansen, August 14, 1976. #1:/Big Thompson Canyon Flood/btc00005 ID. Big Thompson Canyon Flood 5ct Big Thompson Canyon Flood, Colorado. Downstream toe of Olympus Dam at Estes Park, scoured by Dry Gulch. Olympus Dam impounds Lake Estes. Photo by P.W. Schmidt, August 2, 1976. #1:/Big Thompson Canyon Flood/btc00007 ID. Big Thompson Canyon Flood 7ct Big Thompson Canyon Flood, Colorado. Dirt road washed out by drainage channeled into the roadway; near the center, SE, SW, Sec. 16, T. 5 N., R. 72 W., Glen Haven Quadrangle. This area received about 8 inches of rain. Photo by R.R. Shroba, September 20, 1976. #1:/Big Thompson Canyon Flood/btc00017 ID. Big Thompson Canyon Flood 17ct Big Thompson Canyon Flood, Colorado. House precariously undercut by lateral scour on the Big Thompson River a quarter of a mile below Glen Comfort. The landslide on the right in the background was caused by undercutting. A house was carried away at that point. The river flows toward the observer. Photo by R.R. Shroba, August 13, 1976. #1:/Big Thompson Canyon Flood/btc00024 ID. Big Thompson Canyon Flood 24ct Big Thompson Canyon Flood, Colorado. Pickup truck partly buried in a sand blanket deposited by the North Fork Big Thompson River at Drake. Note flood debris in the windows of the house on the right. The North Fork crested here 40 minutes after the main stem. Peak discharge was 8,710 cubic feet second. Photo by W.R. Hansen, August 13, 1976. #1:/Big Thompson Canyon Flood/btc00029 ID. Big Thompson Canyon Flood 29ct Big Thompson Canyon Flood, Colorado. Cabin lodged on a private bridge just below Drake, looking upstream. Photo by W.R. Hansen, August 13, 1976. #1:/Big Thompson Canyon Flood/btc00034 ID. Big Thompson Canyon Flood 34ct Big Thompson Canyon Flood, Colorado. Mouth of Big Thompson Canyon looking upstream into the Narrows. Highway 34 on the left, truncated by the river. Preliminary calculated peak discharge at this point was 31,200 cubic feet per second. August 1, 1976. #1:/Bull W.B. Collection/bwb00001 ID. Bull, W.B. 1 Terraces in the foothill belt of Western Fresno County. Terraces are along Cantua Creek, Looking southeast from NE 1/4 SE 1/4 sec. 35, T. 17 S., R. 14 E. The fence is on a low terrace and two high terraces occur between it and the skyline. California. ca. 1963. Figure 62-A in U.S. Geological Survey. Professional paper 352-E. 1964. #1:/Bull W.B. Collection/bwb00004 ID. Bull, W.B. 4 Concentric near-surface subsidence cracks along one side of a test plot on the Arroyo Ciervo fan. Mendota test site of the California Department of Water Resources. Fresno County, California. ca. 1971. Figure 11 in U.S. Geological Survey. Professional paper 437-C. 1972. #1:/Bull W.B. Collection/bwb00006 ID. Bull, W.B. 6 Normal fault in alluvial-fan deposits adjacent to the south side of the Catalina Mountains. Arizona. 1966. Figure 6 in U.S. Geological Survey. Professional paper 437-C. 1972. #1:/Bull W.B. Collection/bwb00037 ID. Bull, W.B. 37 Compressional buckling of 12-foot square concrete slabs caused by near surface water subsidence. Mendota test site of the California Department of Water Resources. Fresno County, California. ca. 1971. Figure 14 in U.S. Geological Survey. Professional paper 437-C. 1972. #1:/Bull W.B. Collection/bwb00085 ID. Bull, W.B. 85 Subsidence hollow caused by water from leaking pipelines. Fresno County, California. ca. 1971. Figure 25-C in U.S. Geological Survey. Professional paper 437-C. 1972. #1:/Bull W.B. Collection/bwb00087 ID. Bull, W.B. 87 Subsidence of part of a concrete irrigation ditch. Fresno County, California. ca. 1971. Figure 26-A in U.S. Geological Survey. Professional paper 437-C. 1972. #1:/Zion National Park/bwh00117 ID. Bradley, W.H. 117 Zion National Park, Utah. Down the Muguntaweap toward Great White Throne. June 10, 1925. #1:/Zion National Park/bwh00118 ID. Bradley, W.H. 118 Zion National Park, Utah. Down Zion Canyon from just below The Narrows. June 10, 1925. #1:/Zion National Park/bwh00120 ID. Bradley, W.H. 120 Zion National Park, Utah. Domes behind the lodge, viewed from near Emerald Pool. June 10, 1925. #1:/Zion National Park/bwh00149 ID. Bradley, W.H. 149 Zion National Park, Utah. The Three Patriarchs, viewed from the east side of the canyon looking northwest. June 10, 1925. #1:/Zion National Park/bwh00150 ID. Bradley, W.H. 150 Zion National Park, Utah. The Three Patriarchs, viewed from the east side of the canyon looking northwest. June 10, 1925. #1:/Zion National Park/bwh00151 ID. Bradley, W.H. 151 Zion National Park, Utah. The Three Patriarchs, viewed from the east side of the canyon looking northwest. June 10, 1925. #1:/Cedar Breaks National Monument/bwh00154 ID. Bradley, W.H. 154 Cedar Breaks National Monument, Utah. Strong color banding showing advantage of ortho (photographic) plates and a color filter. Bright spot in the foreground is strong sunlight and shows the effect of over-exposure on color render (on black and white film). July 17, 1925. #1:/Bryce Canyon National Park/bwh00155 ID. Bradley, W.H. 155 Bryce Canyon National Park, Utah. Bryce Canyon, viewed from the rim. July 19, 1925. Photos bwh00155 and bwh00156 form a panorama. #1:/Bradley W.H. Collection-Bryce Canyon National Park/bwh00156 ID. Bradley, W.H. 156 Photographs form a panorama. Bryce Canyon from rim. Bryce Canyon National Park. Garfield County, Utah. July 19, 1925. #1:/Bryce Canyon National Park/bwh00157 ID. Bradley, W.H. 157 Bryce Canyon National Park, Utah. Pinnacles and color banding. July 19, 1925. #1:/Bradley W.H. Collection/bwh00304 ID. Bradley, W.H. 304 Specimen of moderately rich oil shale showing fine laminations and the characteristic loop bedding. The zone a little below the center is most typical and represents the edges of polygons formed by sun cracks. From east fork of Parachute Creek T.5 S., R. 95 W. Garfield County, Colorado. 1924. Plate 17-B in U.S. Geological Survey. Professional paper 168. 1931. #1:/Bradley W.H. Collection/bwh00325 ID. Bradley, W.H. 325 Varves in organic marlstone from a bed about 1800 feet above the base of the Green River formation on Clear Creek in sec. 9, T. 5 S., R. 98 W. The darker bands of rock contain the most organic matter. Magnified 4 times. Garfield County, Colorado. 1927. Plate 11 in U.S. Geological Survey. Professional paper 158. 1930. #1:/Bradley W.H. Collection/bwh00560 ID. Bradley, W.H. 560 Unusually large dreikanter of granite on the Lander road a few miles south of Pacific Springs. This dreikanter measures 71 cm by 46 cm deep and 37 cm wide. Sweetwater County, Wyoming. 1930. #1:/Utah-Professional paper 61/bwh00645 ID. Bradley, W.H. 645 West fork of Sheep Creek, showing scalloped crest line of Uinta range. Uinta county, Utah. 1905. Appears in plate 37b in U.S. Geological Survey. Professional paper 61. 1907. Appears in plate 37b in U.S. Geological Survey. Professional paper 185. 1936. #1:/Alaska-Professional paper 2/caj00003 ID. Collier, A.J. 3 Teller from point of sand pit. Seward Peninsula region, Alaska, 1900. Plate 2-A in U.S. Geological Survey Professional paper 2. 1902 #1:/Alaska-Professional paper 2/caj00006 ID. Collier, A.J. 6 South side of York Mountain and beach. Seward Peninsula region, Alaska, 1900. Plate 10-A in U.S. Geological Survey Professional paper 2. 1902 #1:/Alaska-Professional paper 2/caj00007 ID. Collier, A.J. 7 Crumpled limestone Brooks Mountain. Seward Peninsula region, Alaska, 1900 Plate 4-A in U.S. Geological Survey Professional paper 2. 1902. #1:/Alaska-Professional paper 2/caj00008 ID. Collier, A.J. 8 Cape Mountain from York. Seward Peninsula region, Alaska, 1900. Plate 10-B in U.S. Geological Survey Professional paper 2. 1902 #1:/Alaska-Professional paper 2/caj00009 ID. Collier, A.J. 9 Port Clarence limestone Nuluk River. Seward Peninsula region, Alaska, 1900 Plate 4-B in U.S. Geological Survey Professional paper 2. 1902. #1:/Alaska-Professional paper 2/caj00011 ID. Collier, A.J. 11 Ear Mountain from bench at 1,000 feet elevation. Seward Peninsula region, Alaska, 1900 Plate 7-A in U.S. Geological Survey Professional paper 2. 1902. #1:/Alaska-Professional paper 2/caj00015 ID. Collier, A.J. 15 Platy structure in granite Ear Mountain. Seward Peninsula region, Alaska, 1900 Plate 8-B in U.S. Geological Survey Professional paper 2. 1902. #1:/Alaska-Professional paper 2/caj00016 ID. Collier, A.J. 16 Schistose limestone Kugruk group head of Portage Creek. Seward Peninsula region, Alaska, 1900. Plate 5-A in U.S. Geological Survey Professional paper 2. 1902. #1:/Alaska-Professional paper 2/caj00030 ID. Collier, A.J. 30 Valley of Quartz Creek in high gravel bench Seward Peninsula region, Alaska, 1900 Plate 2-B in U.S. Geological Survey Professional paper 2. 1902. #1:/Alaska-Professional paper 2/caj00031 ID. Collier, A.J. 31 Frozen silts containing spruce on Quartz Creek. Seward Peninsula region, Alaska, 1900. Plate 6-B in U.S. Geological Survey Professional paper 2. 1902. #1:/Alaska-Professional paper 2/caj00040 ID. Collier, A.J. 40 Form a panorama of granite outcrops near Hot Springs. Seward Peninsula region, Alaska, 1900. Plate 9 in U.S. Geological Survey Professional paper 2. 1902. #1:/Alaska-Professional paper 2/caj00041 ID. Collier, A.J. 41 Form a panorama of granite outcrops near Hot Springs. Seward Peninsula region, Alaska, 1900. Plate 9 in U.S. Geological Survey Professional paper 2. 1902. #1:/Alaska-Professional paper 2/caj00043 ID. Collier, A.J. 43 Platy structure in granite near Hot Springs. Seward Peninsula region, Alaska, 1900. Plate 8-A in U.S. Geological Survey Professional paper 2. 1902. #1:/Alaska-Professional paper 2/caj00047 ID. Collier, A.J. 47 Schistose limestone Kugruk group Budd Creek. Seward Peninsula region, Alaska, 1900. Plate 5-B in U.S. Geological Survey Professional paper 2. 1902. #1:/Alaska-Professional paper 45/caj00135 ID. Collier, A.J. 135 Yukon valley at Eagle, Alaska. 1902. Photo 136 is the exact match to plate 16-B, however, 135 will make a good substitute, in U.S. Geological Survey. Professional paper 45. 1906. #1:/Alaska-Professional paper 45/caj00136 ID. Collier, A.J. 136 Yukon valley at Eagle, Alaska. 1902. Photo 136 is the exact match to plate 16-B, however, 135 will make a good substitute, in U.S. Geological Survey. Professional paper 45. 1906. #1:/Alaska- Professional paper 45/caj00151 ID. Collier, A.J. 151 Yukon Valley in Ramparts, showing abrupt slope of valley wall from water. Drew Mine 25 miles above Rampart. Alaska. 1902. #1:/Alaska-Professional paper 45/caj00233 ID. Collier, A.J. 233 Form a panorama of wave cut rock bench on the south side of King River valley, Seward Peninsula region, Alaska. 1900, plate 31 in U.S. Geological Survey. Professional paper 45. 1906. #1:/Alaska-Professional paper 45/caj00234 ID. Collier, A.J. 234 Form a panorama of wave cut rock bench on the south side of King River valley, Seward Peninsula region, Alaska. 1900, plate 31 in U.S. Geological Survey. Professional paper 45. 1906. #1:/Alasks-Professional paper 45/caj00235 ID. Collier, A.J. 235 Form a panorama of wave cut rock bench on the south side of King River valley, Seward Peninsula region, Alaska. 1900, plate 31 in U.S. Geological Survey. Professional paper 45. 1906. #1:/Alasks-Professional paper 45/caj00405 ID. Collier, A.J. 405 Valley of Fox River, Seward Peninsula region, Alaska. 1902, plate 17-A in U.S. Geological Survey. Professional paper 45. 1906. #1:/Mesa Verde National Park/caj00704 ID. Collier, A.J. 704 Mesa Verde National Park, Colorado. Kelley's cabin at Spruce Tree House. Circa 1913. #1:/Mesa Verde National Park/caj00705 ID. Collier, A.J. 705 Mesa Verde National Park, Colorado. Ruins of a house on Moccasin Mesa. Circa 1913. #1:/Mesa Verde National Park/caj00708 ID. Collier, A.J. 708 Mesa Verde National Park, Colorado. Inaccessible house on Cliff House Sandstone. Circa 1913. #1:/Mesa Verde National Park/caj00715 ID. Collier, A.J. 715 Mesa Verde National Park, Colorado. Soda Canyon east of Spruce Tree House. Circa 1913. #1:/Mesa Verde National Park/caj00722 ID. Collier, A.J. 722 Mesa Verde National Park, Colorado. Lone Cone and Point Lookout. Circa 1913. #1:/San Fernando, California, Earthquake February 1971/cal00005 ID. California EARTHQUAKE 5 San Fernando, California, Earthquake February 1971. Collapsed overpass connecting Foothill Boulevard and the Golden State Freeway. 1971. #1:/San Fernando, California, Earthquake February 1971/cal00014 ID. California EARTHQUAKE 14 San Fernando, California, Earthquake February 1971. Lower Van Norman Dam, showing slumping on the north side and concrete dropping into the lake. A considerable amount of water had been emptied from the lake at the time. 1971. #1:/San Fernando, California, Earthquake February 1971/cal00015 ID. California EARTHQUAKE 15 San Fernando, California, Earthquake February 1971. House damaged by displacement along reverse fault. 1971. #1:/San Fernando, California, Earthquake February 1971/cal00026 ID. California EARTHQUAKE 26 San Fernando, California, Earthquake February 1971. Building at San Fernando Valley Juvenile Hall located astride the margin of a lateral spread that produced 3 feet of horizontal ground displacement. #1:/San Fernando, California, Earthquake February 1971/cal00029 ID. California EARTHQUAKE 29 San Fernando, California, Earthquake February 1971. Electrical equipment at a knocked-over converter station. 1971. #1:/Grand Canyon National Park/cdon0007 ID. Carroll, Don 7 Grand Canyon National Park, Arizona. Bright Angel Canyon. Circa 1946. #1:/Fossils/car00016 ID. Carrara, P. 16ct Fossils. Excavation of a brontosaurus tail in the Morrison Formation in Moffat County, Colorado. June 9, 1976. #1:/Carrara P. Collection-Dinosaur National Monument/car00028 ID. Carrara, P. 28ct 100 year old rock slide of Weber sandstone. Dinosaur National Monument. Moffat County, Colorado. June 15, 1976. #1:/Carrara P. Collection/Dinosaur National Monument/car00029 ID. Carrara, P. 29ct Petroglyphs by the Fremont people. Cub Creek, Dinosaur National Monument. Uintah County, Utah. June 16, 1976. #1:/Carrara P. Collection/car00056 ID. Carrara, P. 56ct One thousand cubic meter mud flow. Rio Blanco County, Colorado. July 22, 1972. #1:/Antarctica/car00101 ID. Carrara, P. 101ct Antarctica. Weathering sandstone in the Hauberg Mountains near camp 21. December 2, 1977. #1:/Antarctica/car00102 ID. Carrara, P. 102ct Antarctica. Erratic near camp 13. December 12, 1977. #1:/Antarctica/car00105 ID. Carrara, P. 105ct Antarctica. Crevasse near camp 18 in the Wilkins Mountains on the Antarctic Peninsula. Geologist visible in the crevasse. January 2, 1978. #1:/Antarctica/car00106 ID. Carrara, P. 106ct Antarctica. Frost-shattered joints and fractures in rock of the Wilkins Mountains on the Antarctic Peninsula. January 8, 1978. #1:/Antarctica/car00113 ID. Carrara, P. 113ct Antarctica. Unnamed peak in the Nunataks near camp 18. January 21, 1978. #1:/Carrara P. Collection-San Juan Mountains/car00123 ID. Carrara, P. 123ct Rock glacier, near North Twilight Peak. Snowdon Peak quadrangle. San Juan Mountains. San Juan County, Colorado. July 9, 1971. #1:/San Juan Mountains/car00133 ID. Carrara, P. 133ct San Juan Mountains, Colorado. Central Trinity Peak, elevation 13,805 feet. Moraine on the left, rock glacier, and snowfield are also visible. This is one of the few permanent snow fields in the San Juan Mountains. July 24, 1971. #1:/Carrara P. Collection-Good Hope Mine/car00135 ID. Carrara, P. 135ct Good Hope mine area, near the Continental Divide. A mine building is visible at the base of exposed rock, a little right of center. San Juan Mountains. Hinsdale County, Colorado. July 27, 1971. #1:/San Juan Mountains/car00140 ID. Carrara, P. 140ct San Juan Mountains, Colorado. U-shaped valley of Cunningham Creek. July 27, 1971. #1:/San Juan Mountains/car00145 ID. Carrara, P. 145ct San Juan Mountains, Colorado. Wood Mountain arˆte, elevation 13,600 feet. August 3, 1971. #1:/San Juan Mountains/car00146 ID. Carrara, P. 146ct San Juan Mountains, Colorado. Rock glacier in Horseshoe Basin, with arˆte behind. August 14, 1971. #1:/San Juan Mountains/car00149 ID. Carrara, P. 149ct San Juan Mountains, Colorado. Gilpin Peak and arˆte, elevation 13,694 feet. August 14, 1971. #1:/San Juan Mountains/car00151 ID. Carrara, P. 151ct San Juan Mountains, Colorado. Avalanche chute on South Fork Mineral Creek. June 1, 1972. #1:/San Juan Mountains/car00162 ID. Carrara, P. 162ct San Juan Mountains, Colorado. West from Handies Peak, including view of a cirque. June 27, 1972. #1:/Carrara P. Collection/car00163 ID. Carrara, P. 163ct Collapsing mill at old mining town of Middleton. San Juan Mountains. San Juan County, Colorado. June 30, 1972. #1:/Carrara P. Collection-Good Hole Mine/car00164 ID. Carrara, P. 164ct Good Hope mining operation. San Juan Mountains. Hinsdale County, Colorado. July 2, 1972. #1:/San Juan Mountains/car00168 ID. Carrara, P. 168ct San Juan Mountains, Colorado. Terminal moraine of cirque glacier in Yankee Boy Basin. The moraine is about 12,000 years old. July 15, 1972. #1:/Carrara P. Collection/car00169 ID. Carrara, P. 169ct Sneffels mining camp. San Juan Mountains. Ouray County, Colorado. July 16, 1972. #1:/Carrara P. Collection/car00170 ID. Carrara, P. 170ct Sneffels mining camp. San Juan Mountains. Ouray County, Colorado. July 16, 1972. #1:/San Juan Mountains/car00172 ID. Carrara, P. 172ct San Juan Mountains, Colorado. Bog in Picayne Gulch. July 19, 1972. #1:/San Juan Mountains/car00178 ID. Carrara, P. 178ct San Juan Mountains, Colorado. Modern mud cracks in an old pond near the head of Cuba Gulch. July 22, 1972. #1:/San Juan Mountains/car00179 ID. Carrara, P. 179ct San Juan Mountains, Colorado. U-shaped valley of Minnie Gulch. July 22, 1972. #1:/Carrara P. Collection-Good Hope Mine/car00181 ID. Carrara, P. 181ct Good Hope mine. San Juan Mountains. Hinsdale County, Colorado. July 28, 1972. #1:/Carrara P. Collection/car00183 ID. Carrara, P. 183ct Old mine workings in California Gulch. San Juan Mountains. San Juan County, Colorado. July 29, 1972. #1:/San Juan Mountains/car00190 ID. Carrara, P. 190ct San Juan Mountains, Colorado. Avalanche chutes, viewed from Highway 550 near Silverton. February 1973. #1:/Carrara P. Collection/car00194 ID. Carrara, P. 194ct Mine workings in Telluride valley. San Juan Mountains. San Miguel County, Colorado. June 25, 1973. #1:/Carrara P. Collection-Liberty Bell Mine/car00195 ID. Carrara, P. 195ct Ruins of the Liberty Bell mine, above Telluride. On February 28, 1902, a series of 3 avalanches here killed 19 men the worst avalanche disaster in Colorado history. San Juan Mountains. San Miguel County, Colorado. June 26, 1973. #1:/Carrara P. Collection/car00212 ID. Carrara, P. 212ct Mining operations at Pandora, about a mile east of Telluride. San Miguel County, Colorado. September 1974. #1:/San Juan Mountains/car00215 ID. Carrara, P. 215ct San Juan Mountains, Colorado. Battleship avalanche path along Highway 550 north of Silverton. Avalanche forest trimline visible on the left. July 2, 1975. #1:/San Juan Mountains/car00220 ID. Carrara, P. 220ct San Juan Mountains, Colorado. Emery Peak, elevation 13,310 feet, near the Sunnyside Mine, showing a rock glacier coming off the peak. September 12, 1979. #1:/Carrara P. Collection/car00222 ID. Carrara, P. 222ct Remains of Lake Emma at the Sunnyside mine. Mining was being done under the lake when in June 1978 the roof of the stope collapsed, flooding the mine and draining the lake. San Juan Mountains. San Juan County, Colorado. September 12, 1979. #1:/Carrara P. Collection-Sunnyside Mine/car00225 ID. Carrara, P. 225ct Old workings of the Sunnyside Mine in Eureka Gulch. San Juan Mountains. San Juan County, Colorado. September 12, 1979. #1:/Carrara P. Collection-Silver Lake Mine/car00228 ID. Carrara, P. 228ct Silver Lake Mine and Arrastra Basin; near Silverton. San Juan Mountains. San Juan County, Colorado. August 21, 1980. #1:/Carrara P. Collection-Royal Tiger Mine-Silver Lake Mine/car00229 ID. Carrara, P. 229ct Royal Tiger Mine and Silver Lake, near Silverton. San Juan Mountains. San Juan County, Colorado. August 21, 1980. #1:/Carrara P. Collection-Iowa Mine-Silver Lake Mine/car00230 ID. Carrara, P. 230ct The Iowa Mine and Silver Lake, near Silverton. San Juan Mountains. San Juan County, Colorado. August 21, 1980. #1:/Carrara P. Collection-Iowa Mine-Silver Lake Mine/car00232 ID. Carrara, P. 232ct Different view of the Iowa Mine and Silver Lake near Silverton. San Juan Mountains. San Juan County, Colorado. August 21, 1980. #1:/Carrara P. Collection-Iowa Mine-Silver Lake Mine/car00233 ID. Carrara, P. 233ct Slightly different view of the Iowa Mine and Silver Lake near Silverton. San Juan Mountains. San Juan County, Colorado. August 21, 1980. #1:/Carrara P. Collection-Good Hope Mine/car00253 ID. Carrara, P. 253ct Abandoned buildings at the Good Hope mine. San Juan Mountains. Hinsdale County, Colorado. September 2, 1980. #1:/Glacier National Park/car00266 ID. Carrara, P. 266ct Glacier National Park, Montana. Lewis overthrust, viewed from Marias Pass. Precambrian rocks over Cretaceous shale and sandstone. July 3, 1979. #1:/Glacier National Park/car00267 ID. Carrara, P. 267ct Glacier National Park, Montana. Little Chief Mountain. Small glacier with a moraine at bottom of the cirque visible in lower part of photograph. July 3, 1979. #1:/Glacier National Park/car00268 ID. Carrara, P. 268ct Glacier National Park, Montana. Going-to-the-Sun Mountain. July 3, 1979. #1:/Glacier National Park/car00269 ID. Carrara, P. 269ct Glacier National Park, Montana. U-shaped glacial trough of McDonald Valley with snow-capped mountains. July 3, 1979. #1:/Glacier National Park/car00271 ID. Carrara, P. 271ct Glacier National Park, Montana. Mount Stimson, a horn scoured by glaciers on all sides. July 3, 1979. #1:/Glacier National Park/car00272 ID. Carrara, P. 272ct Glacier National Park, Montana. Pumpelly Glacier. July 3, 1979. #1:/Glacier National Park/car00273 ID. Carrara, P. 273ct Glacier National Park, Montana. Mount Jackson and Harrison Glacier. July 3, 1979. #1:/Glacier National Park/car00274 ID. Carrara, P. 274ct Glacier National Park, Montana. Mount Jackson covered with snow. July 3, 1979. #1:/Glacier National Park/car00279 ID. Carrara, P. 279ct Glacier National Park, Montana. Heavens Peak, elevation 9,008 feet. July 3, 1979. #1:/Glacier National Park/car00282 ID. Carrara, P. 282ct Glacier National Park, Montana. Avalanche tracks visible on Boundary Mountain. July 3, 1979. #1:/Glacier National Park/car00283 ID. Carrara, P. 283ct Glacier National Park, Montana. Agassiz Glacier trim zone. July 3, 1979. #1:/Glacier National Park/car00285 ID. Carrara, P. 285ct Glacier National Park, Montana. Mount Cleveland, elevation 10,466, the highest peak in the park. July 3, 1979. #1:/Glacier National Park/car00286 ID. Carrara, P. 286ct Glacier National Park, Montana. Lush vegetation along Snyder Ridge Trail. July 4, 1979. #1:/Glacier National Park/car00287 ID. Carrara, P. 287ct Glacier National Park, Montana. Meadow on Snyder Ridge. July 4, 1979. #1:/Glacier National Park/car00288 ID. Carrara, P. 288ct Glacier National Park, Montana. Glacial till along Snyder Ridge Trail. July 4, 1979. #1:/Glacier National Park/car00290 ID. Carrara, P. 290ct Glacier National Park, Montana. Looking up Agassiz Glacier from trimline. July 7, 1979. #1:/Glacier National Park/car00291 ID. Carrara, P. 291ct Glacier National Park, Montana. Kinnerly Peak, elevation 9,944 feet. July 8, 1979. #1:/Glacier National Park/car00292 ID. Carrara, P. 292ct Glacier National Park, Montana. Glacial polish, striations, and scour in the Agassiz Glacier area. July 8, 1979. #1:/Glacier National Park/car00293 ID. Carrara, P. 293ct Glacier National Park, Montana. Glacial striations in the Agassiz Glacier area. July 8, 1979. #1:/Glacier National Park/car00296 ID. Carrara, P. 296ct Glacier National Park, Montana. Deer in velvet at Agassiz camp. July 12, 1979. #1:/Glacier National Park/car00297 ID. Carrara, P. 297ct Glacier National Park, Montana. Geologist standing on the mid-nineteenth century terminal moraine of Clements Glacier. July 17, 1979. #1:/Glacier National Park/car00298 ID. Carrara, P. 298ct Glacier National Park, Montana. Flinsch Peak with Old Man Lake in the foreground. July 18, 1979. #1:/Glacier National Park/car00299 ID. Carrara, P. 299ct Glacier National Park, Montana. Red Mountain, elevation 9,377 feet. July 19, 1979. #1:/Glacier National Park/car00301 ID. Carrara, P. 301ct Glacier National Park, Montana. "No Name Glacier," so-called because it is near No Name Lake. July 19, 1979:. #1:/Glacier National Park/car00302 ID. Carrara, P. 302ct Glacier National Park, Montana. Geologist standing on the mid-nineteenth century terminal moraine of "No Name Glacier," so-called because it is near No Name Lake. July 19, 1979. #1:/Glacier National Park/car00303 ID. Carrara, P. 303ct Glacier National Park, Montana. Deadwood Falls on Reynolds Creek. July 22, 1979. #1:/Glacier National Park/car00304 ID. Carrara, P. 304ct Glacier National Park, Montana. Crevasses visible in the front part of Jackson Glacier. Glacial striae visible on the Helena Formation in the foreground. July 23, 1979. #1:/Glacier National Park/car00305 ID. Carrara, P. 305ct Glacier National Park, Montana. Lake Ellen Wilson. July 31, 1979. #1:/Glacier National Park/car00306 ID. Carrara, P. 306ct Glacier National Park, Montana. Waterfall which flows into Lake Ellen Wilson. July 31, 1979. #1:/Glacier National Park/car00311 ID. Carrara, P. 311ct Glacier National Park, Montana. Calcium carbonate deposited in front of Jackson Glacier on recently deglaciated bedrock. These deposits are common near the edge of a glacier which has recently retreated, but they disappear within several decades of being exposed. Such deposits do not occur beyond 50 to 100 yards of the terminus of the glacier. August 1, 1979. #1:/Glacier National Park/car00312 ID. Carrara, P. 312ct Glacier National Park, Montana. Harrison Glacier. August 1, 1979. #1:/Glacier National Park/car00315 ID. Carrara, P. 315ct Glacier National Park, Montana. The sharp peak in the center is Mount Logan, elevation 9,236 feet. A mid-nineteenth century moraine is visible in the foreground. August 1, 1979. #1:/Glacier National Park/car00317 ID. Carrara, P. 317ct Glacier National Park, Montana. Scree in the Firebrand Pass area. August 3, 1979. #1:/Glacier National Park/car00318 ID. Carrara, P. 318ct Glacier National Park, Montana. Colluvium and conglomerate. August 6, 1979. #1:/Glacier National Park/car00319 ID. Carrara, P. 319ct Glacier National Park, Montana. Iceberg Lake arˆte. August 9, 1979. #1:/Glacier National Park/car00320 ID. Carrara, P. 320ct Glacier National Park, Montana. Geologist investigating bog in the Iceberg Lake area. August 9, 1979. #1:/Glacier National Park/car00321 ID. Carrara, P. 321ct Glacier National Park, Montana. Fine laminations in the Precambrian Appekunny Formation. July 3, 1981. #1:/Glacier National Park/car00322 ID. Carrara, P. 322ct Glacier National Park, Montana. Ripple marks in the Spokane Formation along Going-to-the-Sun Highway. July 3, 1981. #1:/Glacier National Park/car00323 ID. Carrara, P. 323ct Glacier National Park, Montana. Mud chip breccia in the Spokane Formation along Going-to-the-Sun Highway. July 3, 1981. #1:/Glacier National Park/car00324 ID. Carrara, P. 324ct Glacier National Park, Montana. Molar tooth structure in the Helena Formation along Going-to-the-Sun Highway. July 3, 1981. #1:/Glacier National Park/car00325 ID. Carrara, P. 325ct Glacier National Park, Montana. Algal stromatolites in the Helena Formation along Going-to-the-Sun Highway. July 3, 1981. #1:/Glacier National Park/car00331 ID. Carrara, P. 331ct Glacier National Park, Montana. Soil Profile near Bowman Lake. July 8, 1981. #1:/Glacier National Park/car00334 ID. Carrara, P. 334ct Glacier National Park, Montana. Ripple marks in the Mount Shields Formation on Hucklebury Mountain. July 11, 1981. #1:/Glacier National Park/car00345 ID. Carrara, P. 345ct Glacier National Park, Montana. Avalanche track in the Kintla Lake area. July 12, 1981. #1:/Glacier National Park/car00346 ID. Carrara, P. 346ct Glacier National Park, Montana. Avalanche track in the Kintla Lake area. July 12, 1981. #1:/Glacier National Park/car00347 ID. Carrara, P. 347ct Glacier National Park, Montana. Top to bottom: Mount Shields, Shepard and Snowslip Formations exposed in Kintla Lake area. July 1981. #1:/Glacier National Park/car00348 ID. Carrara, P. 348ct Glacier National Park, Montana. Kinnerly Peak, a glacial horn. July 12, 1982. #1:/Glacier National Park/car00349 ID. Carrara, P. 349ct Glacier National Park, Montana. Agassiz Glacier. July 12, 1981. #1:/Glacier National Park/car00351 ID. Carrara, P. 351ct Glacier National Park, Montana. Glacial limits of Agassiz Glacier in 1850. July 12, 1981. #1:/Glacier National Park/car00352 ID. Carrara, P. 352ct Glacier National Park, Montana. Akokaja Lake. July 12, 1981. #1:/Glacier National Park/car00356 ID. Carrara, P. 356ct Glacier National Park, Montana. Meanders of Camas Creek as it empties into the North Fork Flathead River. July 12, 1981. #1:/Glacier National Park/car00360 ID. Carrara, P. 360ct Glacier National Park, Montana. Exposure of (top to bottom at an angle) Quaternary gravel and the Kishenehn Formation along North Fork Flathead River. July 15, 1981. #1:/Glacier National Park/car00386 ID. Carrara, P. 386ct Glacier National Park, Montana.U.S. Geological Survey camp near Gunsight Lake. Blackfoot Mountain in the background. August 5, 1981. #1:/Glacier National Park/car00387 ID. Carrara, P. 387ct Glacier National Park, Montana. Across Blackfoot Glacier. August 6, 1981. #1:/Glacier National Park/car00390 ID. Carrara, P. 390ct Glacier National Park, Montana. Terminus of Jackson Glacier. Glaciated surfaces in the middle ground. August 6, 1981. #1:/Glacier National Park/car00392 ID. Carrara, P. 392ct Glacier National Park, Montana. Mount Jackson, viewed from Gunsight Lake. August 6, 1987 #1:/Glacier National Park/car00393 ID. Carrara, P. 393ct Glacier National Park, Montana. Exposure of Helena and Spokane Formations near Gunsight Lake. August 7, 1981 #1:/Glacier National Park/car00396 ID. Carrara, P. 396ct Glacier National Park, Montana. Gunsight Mountain, showing Helena and Spokane Formations. August 7. 1981. #1:/Glacier National Park/car00398 ID. Carrara, P. 398ct Glacier National Park, Montana. Moraine at the head of Gunsight Lake. August 7, 1981. #1:/Glacier National Park/car00399 ID. Carrara, P. 399ct Glacier National Park, Montana. Fusillade Mountain, viewed from the Jackson Glacier area. August 7, 1981. #1:/Glacier National Park/car00400 ID. Carrara, P. 400ct Glacier National Park, Montana. Bowman Lake, looking toward the Livingston Range in the background. August 13, 1981. #1:/Glacier National Park/car00401 ID. Carrara, P. 401ct Glacier National Park, Montana. Exposure of Helena Formation and talus on Brown Pass Trail. August 13, 1981. #1:/Glacier National Park/car00403 ID. Carrara, P. 403ct Glacier National Park, Montana. Algal stromatolites from the Helena Formation in the Thunderbird Glacier area. August 13, 1981. #1:/Glacier National Park/car00404 ID. Carrara, P. 404ct Glacier National Park, Montana. Exposure of Shepard, Snowslip and Helena Formations on Chapman Peak in the Browns Pass area. August 13, 1981. #1:/Glacier National Park/car00405 ID. Carrara, P. 405ct Glacier National Park, Montana. Thunderbird Glacier area. August 14, 1981. #1:/Glacier National Park/car00407 ID. Carrara, P. 407ct Glacier National Park, Montana. Waterfalls in Lake Francis. August 14, 1981. #1:/Glacier National Park/car00408 ID. Carrara, P. 408ct Glacier National Park, Montana. Lake Francis, looking east. August 14, 1981. #1:/Glacier National Park/car00410 ID. Carrara, P. 410ct Glacier National Park, Montana. Thunderbird Mountain, viewed from Browns Pass. August 14, 1981. #1:/Glacier National Park/car00411 ID. Carrara, P. 411ct Glacier National Park, Montana. Boulder Pass (right of center), viewed from the Browns Pass area. August 15, 1981. #1:/Glacier National Park/car00413 ID. Carrara, P. 413ct Glacier National Park, Montana. Boulder Pass, taken on the trail to Hole-in- the-Wall. August 15, 1981. #1:/Glacier National Park/car00414 ID. Carrara, P. 414ct Glacier National Park, Montana. Waterfalls at Hole-in-the-Wall. August 15, 1981. #1:/Glacier National Park/car00432 ID. Carrara, P. 432ct Glacier National Park, Montana. Frost-heaved blocky boulders of the Shepard Formation in the Boulder Pass area. August 16, 1981. See also photo car00433. #1:/Glacier National Park/car00433 ID. Carrara, P. 433ct Glacier National Park, Montana. Blocky frost-heaved boulders of the Shepard Formation in the Boulder Pass area. August 16, 1981. See also photo car00432. #1:/Glacier National Park/car00434 ID. Carrara, P. 434ct Glacier National Park, Montana. Exposure of Mount Shields and Shepard Formations in Boulder Pass area. August 16, 1981. #1:/Glacier National Park/car00435 ID. Carrara, P. 435ct Glacier National Park, Montana. Boulder Glacier at Boulder Pass. August 16, 1981. #1:/Glacier National Park/car00436 ID. Carrara, P. 436ct Glacier National Park, Montana. Precambrian lava flow structure in the Boulder Pass area. August 17, 1981. #1:/Glacier National Park/car00439 ID. Carrara, P. 439ct Glacier National Park, Montana. Lava flow surface in the Boulder Pass area. August 17, 1981. #1:/Glacier National Park/car00440 ID. Carrara, P. 440ct Glacier National Park, Montana. Exposed cross section of lava in the Boulder Pass area. August 17, 1981. #1:/Glacier National Park/car00441 ID. Carrara, P. 441ct Glacier National Park, Montana. Hikers on Comeau Pass by Sperry Glacier. August 23, 1981. #1:/Glacier National Park/car00443 ID. Carrara, P. 443ct Glacier National Park, Montana. Different views of Sperry Glacier. August 23, 1981. #1:/Glacier National Park/car00444 ID. Carrara, P. 444ct Glacier National Park, Montana. Different views of Sperry Glacier. August 23, 1981. #1:/Glacier National Park/car00445 ID. Carrara, P. 445ct Glacier National Park, Montana. Robert G. McGimsey next to a crevasse in Sperry Glacier. August 23, 1981. #1:/Glacier National Park/car00447 ID. Carrara, P. 447ct Glacier National Park, Montana. 1850 moraine and Sperry Glacier in the background. August 23, 1981. #1:/Glacier National Park/car00454 ID. Carrara, P. 454ct Glacier National Park, Montana. Mud chip breccia in quartzite layering in the Spokane Formation in the Sperry Glacier area. August 23, 1981. #1:/Glacier National Park/car00463 ID. Carrara, P. 463ct Glacier National Park, Montana. Vigil Peak. July 9, 1982. #1:/Glacier National Park/car00464 ID. Carrara, P. 464ct Glacier National Park, Montana. Lake Isabel. July 9, 1982. #1:/Glacier National Park/car00466 ID. Carrara, P. 466ct Glacier National Park, Montana. Mount Saint Nicholas. July 9, 1982. #1:/Glacier National Park/car00470 ID. Carrara, P. 470ct Glacier National Park, Montana. Black bear paw print near Howe Lake. July 12, 1982 #1:/Glacier National Park/car00475 ID. Carrara, P. 475ct Glacier National Park, Montana, area. Exposure of lake sediments outside the park at Marias Pass, showing from bottom to top: Glacier Peak ash, ash-rich lake sediments, and contorted bedding. July 18, 1982. #1:/Glacier National Park/car00476 ID. Carrara, P. 476ct Glacier National Park, Montana, area. Exposure of lake sediments outside the park showing from bottom to top: varved lake sediments, Glacier Peak ash, ash- rich varves and contorted bedding. July 18, 1982. #1:/Glacier National Park/car00477 ID. Carrara, P. 477ct Glacier National Park, Montana, area. Entire exposure of lake varves, contorted bedding outside the park at Marias Pass. July 18, 1982. #1:/Glacier National Park/car00480 ID. Carrara, P. 480ct Glacier National Park, Montana. Saint Mary Lake, viewed from Going-to-the- Sun Point. July 23, 1982. #1:/Glacier National Park/car00481 ID. Carrara, P. 481ct Glacier National Park, Montana. Mud cracks in the Grinnell (Spokane) Formation. July 23, 1982. #1:/Glacier National Park/car00482 ID. Carrara, P. 482ct Glacier National Park, Montana. Mud cracks in the Grinnell (Spokane) Formation. July 23, 1982. #1:/Glacier National Park/car00483 ID. Carrara, P. 483ct Glacier National Park, Montana. Summit of Mount Clements, viewed from Going-to-the-Sun Highway. July 23, 1982. #1:/Glacier National Park/car00484 ID. Carrara, P. 484ct Glacier National Park, Montana. Precambrian stromatolites in the Siyeh Formation along Going-to-the-Sun Highway. July 23, 1982. #1:/Glacier National Park/car00489 ID. Carrara, P. 489ct Glacier National Park, Montana. Summit of Edwards Mountain. July 26, 1982. #1:/Glacier National Park/car00491 ID. Carrara, P. 491ct Glacier National Park, Montana. Mount Brown fire lookout. July 26, 1982. #1:/Glacier National Park/car00492 ID. Carrara, P. 492ct Glacier National Park, Montana. Bowman Lake ranger cabin. July 29, 1982. #1:/Glacier National Park/car00493 ID. Carrara, P. 493ct Glacier National Park, Montana. Numa Ridge bog. July 30, 1982. #1:/Glacier National Park/car00494 ID. Carrara, P. 494ct Glacier National Park, Montana.U.S. Geological Survey party at West Glacier. Left to right: Paul Carrara, Robert G. McGimsey, unknown, Sam Dennis (extreme right). USGS trailer in the background. August 3,1982. #1:/Glacier National Park/car00498 ID. Carrara, P. 498ct Glacier National Park, Montana. Along Middle Fork Flathead River. Soil exposure showing from top to bottom: landslide debris, woody material, lake sediment. August 5, 1982. #1:/Glacier National Park/car00500 ID. Carrara, P. 500ct Glacier National Park, Montana. Varves exposed along the Flathead River at Apgar Mountain site. August 5, 1982. #1:/Glacier National Park/car00503 ID. Carrara, P. 503ct Glacier National Park, Montana. Sinopah Mountain. August 10, 1982. #1:/Glacier National Park/car00505 ID. Carrara, P. 505ct Glacier National Park, Montana. Talus cone at Lake Isabel. August 11, 1982. #1:/Glacier National Park/car00506 ID. Carrara, P. 506ct Glacier National Park, Montana. Valley wall glacier and associated moraine in Lake Isabel area. August 12, 1982. #1:/Glacier National Park/car00508 ID. Carrara, P. 508ct Glacier National Park, Montana. Vigil Peak and Lake Isabel. August 12, 1982. #1:/Glacier National Park/car00509 ID. Carrara, P. 509ct Glacier National Park, Montana. Grizzly Mountain and the Continental Divide. August 13, 1982. #1:/Glacier National Park/car00513 ID. Carrara, P. 513ct Glacier National Park, Montana. Glacial erratics (lower right foreground) on the summit of Teakettle Mountain. August 18, 1982. #1:/Glacier National Park/car00517 ID. Carrara, P. 517ct Glacier National Park, Montana. Across Lake Ellen Wilson area. Mid-nineteenth century moraine with snow bank behind it. August 24, 1982. #1:/Glacier National Park/car00519 ID. Carrara, P. 519ct Glacier National Park, Montana. Gunsight Pass. Lake Ellen Wilson in the foreground. August 24, 1982. #1:/Glacier National Park/car00532 ID. Carrara, P. 532ct Glacier National Park, Montana. Sinopah Mountain, viewed from the east end of Two Medicine Lake. July 12, 1983. #1:/Glacier National Park/car00533 ID. Carrara, P. 533et Glacier National Park, Montana. Rising Wolf Mountain. July 12, 1983. #1:/Glacier National Park/car00537 ID. Carrara, P. 537ct Glacier National Park, Montana. Rock glacier in the Divide Mountain area. July 13, 1983. #1:/Glacier National Park/car00543 ID. Carrara, P. 543ct Glacier National Park, Montana. Frost-heaved slope on Medicine Peak. July 17, 1983. #1:/Glacier National Park/car00544 ID. Carrara, P. 544ct Glacier National Park, Montana. Mount Henry cirque. July 17, 1983. #1:/Glacier National Park/car00545 ID. Carrara, P. 545ct Glacier National Park, Montana. Cushion plant among frost-heaved rubble in the Mount Henry area. July 17, 1983. #1:/Glacier National Park/car00547 ID. Carrara, P. 547ct Glacier National Park, Montana. Appistoki Falls. Bedrock is Precambrian Appekunny Formation. July 17, 1983. #1:/Glacier National Park/car00548 ID. Carrara, P. 548ct Glacier National Park, Montana. Singleshot Mountain, showing Precambrian Appekunny and Altyn Formations. Quaternary landslide in the foreground. Bog along Eagle Lake Trail in the foreground. July 19, 1983. #1:/Glacier National Park/car00594 ID. Carrara, P. 594ct Glacier National Park, Montana. Nineteenth century moraines fronting Red Eagle Glacier. August 9, 1983. #1:/Glacier National Park/car00600 ID. Carrara, P. 600ct Glacier National Park, Montana. Recently deglaciated bedrock benches fronting Red Eagle Glacier. August 7, 1983. #1:/Glacier National Park/car00606 ID. Carrara, P. 606ct Glacier National Park, Montana. Nineteenth century moraines at Sperry Glacier. August 15, 1983. #1:/Glacier National Park/car00607 ID. Carrara, P. 607ct Glacier National Park, Montana. Clements Glacier. August 15, 1983. #1:/Glacier National Park/car00610 ID. Carrara, P. 610ct Glacier National Park, Montana. Morainal system in the Norris Mountain area. August 15, 1983. #1:/Hebgen Lake, Montana, Earthquake August 1959/car00622 ID. Carrara, P. 622ct Hebgen Lake, Montana, Earthquake August 1959. Remnant of the road which slid into the lake is on the left. New road is on the right. July 6, 1984. #1:/Glacier National Park/car00639 ID. Carrara, P. 639ct Glacier National Park, Montana. Looking south from Ptarmigan Lake to Grinnell Glacier and Mount Wilbur. July 13, 1984. #1:/Glacier National Park/car00642 ID. Carrara, P. 642ct Glacier National Park, Montana. Elizabeth Lake, viewed from Ptarmigan Tunnel. July 13, 1984. #1:/Glacier National Park/car00643 ID. Carrara, P. 643ct Glacier National Park, Montana. Old Sun Glacier, viewed from the north side of the Ptarmigan Trail tunnel. July 13, 1984. #1:/Glacier National Park/car00646 ID. Carrara, P. 646ct Glacier National Park, Montana. Piegan Glacier. July 14, 1984. #1:/Glacier National Park/car00649 ID. Carrara, P. 649ct Glacier National Park, Montana. Mount Jackson, viewed from Piegan Pass Trail. July 14, 1984. #1:/Glacier National Park/car00654 ID. Carrara, P. 654ct Glacier National Park, Montana. Piegan Pass area, looking south. Prominent peak is Matahpi Peak. July 14, 1984. #1:/Glacier National Park/car00659 ID. Carrara, P. 659ct Glacier National Park, Montana. Apikuni Mountain, viewed from east of Miniglacier. Sequence from top: Apikuni Formation of green-gray argillites, light-banded Altyn Formation (Precambrian dolomite), Lewis thrust, landslide material. July 18, 1984. #1:/Glacier National Park/car00660 ID. Carrara, P. 660ct Glacier National Park, Montana. Altyn Peak, viewed from east of Miniglacier. Sequence from top: Apikuni Formation of green-gray argillites; light-banded Altyn Formation (Precambrian dolomite); Lewis thrust; landslide material. July 18, 1984. #1:/Glacier National Park/car00669 ID. Carrara, P. 669ct Glacier National Park, Montana. Mt. Cleveland, the highest peak in the park, viewed from Lee Ridge. July 25, 1984. #1:/Glacier National Park/car00671 ID. Carrara, P. 671ct Glacier National Park, Montana. Stone stripes in the Lee Ridge area. July 25, 1984. #1:/Glacier National Park/car00673 ID. Carrara, P. 673ct Glacier National Park, Montana. Gable Mountain, viewed from Lee Ridge, with stone stripes in the foreground. July 25, 1984. #1:/Glacier National Park/car00699 ID. Carrara, P. 699ct Glacier National Park, Montana, area. Vertical bedding of fluvial-glacial deposits outside the park in the Lookout Mountain area. August 6, 1984. #1:/Glacier National Park/car00707 ID. Carrara, P. 707ct Glacier National Park, Montana. Crevasses in Sperry Glacier, looking down valley. August 10, 1984. #1:/Glacier National Park/car00721 ID. Carrara, P. 721ct Glacier National Park, Montana. Grinnell Lake. August 18, 1984. #1:/Glacier National Park/car00729 ID. Carrara, P. 729ct Glacier National Park, Montana. Mud Lake. August 14, 1985. #1:/Glacier National Park/car00730 ID. Carrara, P. 730ct Glacier National Park, Montana. Kintla Creek bog. August 14, 1985. #1:/Glacier National Park/car00731 ID. Carrara, P. 731ct Glacier National Park, Montana. One mile south of Round Prairie near Glacier Route 7 road. Cabin Gulch exposure, showing Glacier Peak G ash (upper white line) and Saint Helens J ash (white line near pocketknife). August 16, 1985. #1:/Glacier National Park/car00732 ID. Carrara, P. 732ct Glacier National Park, Montana. One mile south of Round Prairie near Glacier Route 7 road. View of Cabin Gulch exposure, showing Glacier Peak G ash. August 16, 1985. #1:/Glacier National Park/car00734 ID. Carrara, P. 734ct Glacier National Park, Montana. No Name Lake. No Name Glacier and moraine are at the foot of the cliffs beyond the lake. August 18, 1985. #1:/Glacier National Park/car00735 ID. Carrara, P. 735ct Glacier National Park, Montana. No Name Lake, viewed from a moraine of a small glacier. August 18, 1985. #1:/Glacier National Park/car00736 ID. Carrara, P. 736ct Glacier National Park, Montana. Dawson Pass, on the left, viewed from No Name Lake. Peak is Flinsch Peak. August 18, 1985. #1:/Glacier National Park/car00739 ID. Carrara, P. 739ct Glacier National Park, Montana. Belly River and Bear Mountain. August 23, 1985. #1:/Glacier National Park/car00740 ID. Carrara, P. 740ct Glacier National Park, Montana. Belly River Ranger Station. Gable Mountain in the distance. August 23, 1985. #1:/Glacier National Park/car00741 ID. Carrara, P. 741ct Glacier National Park, Montana. Snow avalanche tracks on Helen Lake Trail. August 24, 1985. #1:/Glacier National Park/car00742 ID. Carrara, P. 742ct Glacier National Park, Montana. Old Sun Glacier, viewed from Helen Lake Trail. August 24, 1985. #1:/Glacier National Park/car00743 ID. Carrara, P. 743ct Glacier National Park, Montana. Ahern Glacier, viewed from Helen Lake Trail. August 24, 1985. #1:/Glacier National Park/car00744 ID. Carrara, P. 744ct Glacier National Park, Montana. Ahern Peak, viewed from Helen Lake Trail. August 24, 1985. #1:/Glacier National Park/car00747 ID. Carrara, P. 747ct Glacier National Park, Montana. Recently deglaciated surface in front of Clements Glacier. August 27, 1985. #1:/Glacier National Park/car00751 ID. Carrara, P. 751ct Glacier National Park, Montana. Dike bordered by baked zone in Siyeh Limestone behind Grinnell Glacier. August 28, 1985. #1:/Glacier National Park/car00752 ID. Carrara, P. 752ct Glacier National Park, Montana. Crevasses near the terminus of Grinnell Glacier. August 28, 1985. #1:/Glacier National Park/car00753 ID. Carrara, P. 753ct Glacier National Park, Montana. Salamander Snowfield above Grinnell Glacier. August 28, 1985. #1:/Glacier National Park/car00754 ID. Carrara, P. 754ct Glacier National Park, Montana. Sills and fault above Grinnell Glacier. August 28, 1985. #1:/San Juan Mountains/car00795 ID. Carrara, P. 795ct San Juan Mountains, Colorado. Henson Creek and avalanche track. August 21, 1986. #1:/Carrara P. Collection-Good Hope Mine/car00804 ID. Carrara, P. 804ct Distant view of Good Hope Silver mine. San Juan County, Colorado. August 22, 1986. #1:/Carrara P. Collection-Good Hope Mine/car00805 ID. Carrara, P. 805ct Closer view of Good Hope Silver mine. San Juan County, Colorado. August 22, 1986. #1:/Calkins, F.C. Collection/ccf00816 ID. Calkins, F.C. 816 Bog tunnel. Base of Cambrian, bed of white quartz wedge appears under it. Utah County, Utah. ca 1919. #1:/Cross C.W. Collection/ccw00114 ID. Cross, C.W. 114 Quarry in rhyolite "Security" ("Geyser") mine. Silver Cliff, Rosita Hills District, Custer County, Colorado. 1888. #1:/Cross C.W. Collection/ccw00115 ID. Cross, C.W. 115 Quarry in rhyolite "Security" ("Geyser"). Silver Cliff, Rosita Hills district, Custer County, Colorado. 1888. #1:/Cross C.W. Collection/ccw00122 ID. Cross, C.W. 122 Panoramic with 123, view from S.E. Rosita, Rosita Hills Hills District, Custer County, Colorado. 1888. Plate 32 in U.S. Geological Survey 17th Annual Report part 2. 1896. #1:/Cross C.W. Collection/ccw00123 ID. Cross, C.W. 123 Pocahontas Hill, Mt. Robinson; from the S.E. Panoramic with 122. Rosita, Rosita Hills district, Custer County, Colorado, 1888. #1:/Cross C.W. Collection/ccw00211 ID. Cross, C.W. 211 Ridge between Virginius and Marshall Basins; from the bench on trail near Stony Mountain. Shows very clearly the rhyolitic series above the San Juan tuff, with the thin andesite sheet between. Telluride quadrangle, Ouray County, Colorado. 1895. #1:/Cross C.W. Collection/ccw00213 ID. Cross, C.W. 213 Looking west southwest from trail between Savage and Marshall basins. The Smuggler-Union tunnel in foreground, gorges of San Miguel and Bear Creeks, Mt. Wilson group in background. Telluride quadrangle, San Miguel County, Colorado. 1895. #1:/Cross C.W. Collection/ccw00338 ID. Cross, C.W. 338 C.H.C. Hill from near mouth of Marguerite Gulch. On the left is seen a ledge of rock in place in the center the characteristic landslide topography of C.H.C. Hill and at its base are the floodplains of the Dolores River at Burns due to damming by the landslide Rico quadrangle Dolores County, Colorado. October 1897. Plate 16 in U.S. Geological Survey 21st Annual Report pt 2. 1900. #1:/Cross C.W. Collection/ccw00430 ID. Cross, C.W. 430 Delores Mountain, Newman Hill from bench west of Rico. Rico quadrangle, Dolores County, Colorado. July 1899. #1:/Cross C.W. Collection/ccw00453 ID. Cross, C.W. 453 Joints in granite cut by veins of quartz, feldspar and biotite, opposite Ten Mile Creek, Las Animas Canyon. San Juan County, Colorado. October 10, 1900. #1:/Cross C.W. Collection-Robinson Mine/ccw00471 ID. Cross, C.W. 471 Looking south From knoll north of the Robinson Mine. Shows landslide topography about the Robinson, Guston, and Yankee Girl mines. Silverton quadrangle, Ouray County, Colorado. September 14, 1900. #1:/Cross C.W. Collection/ccw00476 ID. Cross, C.W. 476 Forms a panorama with 475 connecting on south and taking in Red Mountain. Silverton quadrangle, Ouray County, Colorado. September 15, 1900. #1:/Yellowstone National Park/cdd00156 ID. Condit, D.D. 156 Yellowstone National Park, Wyoming. Herd of elk on Quadrant Mountain. July 20, 1916. #1:/Yellowstone National Park/cdd00158 ID. Condit, D.D. 158 Yellowstone National Park, Wyoming. Bears feeding on a garbage heap near the Fountain Hotel. July 1916. See also photo wcd0475f. #1:/Capitol Reef National Monument/cdon0001 ID. Carroll, Don 1 Capitol Reef National Monument, Utah. Hickman Natural Bridge in the Kayenta Formation. #1:/Zion National Park/cdon0004 ID. Carroll, Don 4 Zion National Park, Utah. Cross-bedded Navajo Sandstone on Checkerboard Mountain along the Zion-Mount Carmel road. Circa 1946. #1:/Rainbow Bridge National Monument/cdon0011 ID. Carroll, Don 11 Rainbow Bridge National Monument, Utah. Bridge Canyon, looking south. Rainbow Bridge in the distance. #1:/Capitol Reef National Monument/cdon0013 ID. Carroll, Don 13 Capitol Reef National Monument, Utah. Southwest toward Miners Mountain, dip slope on Moenkopi Formation. The cliff on the left is Wingate Sandstone along Capitol Reef; the slope below is Chinle Formation. The Fremont River enters on the right and flows between the cultivated fields and hill in the lower right corner. #1:/Mount Rainier National Park/cdr00001 ID. Crandell, D.R. 1ct Mount Rainier National Park, Washington. Outcrop of light gray welded tuff in the Stevens Ridge Formation along the road in Stevens Canyon. The angular dark gray fragments in the welded tuff are chunks of pumice. Figure 2, U.S. Geological Survey Bulletin 1292; Figure 2, U.S. Geological Survey Bulletin 1292 (revised edition). #1:/Mount Rainier National Park/cdr00002 ID. Crandell, D.R. 2ct Mount Rainier National Park, Washington. Granodiorite looks like granite and has a light gray speckled appearance. The knife is about 3 inches long. Figure 3, U.S. Geological Survey Bulletin 1292; Figure 3, U.S. Geological Survey Bulletin 1292 (revised edition). #1:/Mount Rainier National Park/cdr00003 ID. Crandell, D.R. 3ct Mount Rainier National Park, Washington. Columns of dark gray andesite at the east end of an old lava flow from Mount Rainier. This outcrop is near the point at which the highway to Yakima Park crosses Yakima Creek. Figure 6, U.S. Geological Survey Bulletin 1292; Figure 5, U.S. Geological Survey Bulletin 1292 (revised edition). #1:/Mount Rainier National Park/cdr00004 ID. Crandell, D.R. 4ct Mount Rainier National Park, Washington. The snow-covered lava cone lies in a depression 14 miles wide at the summit of the volcano. The cone was probably built about 2,000 years ago. Liberty Cap is on the left and Point Success is on the right. The cliffs below and to the right of the Liberty Cap enclose Sunset Amphitheater. Figure 11, U.S. Geological Survey Bulletin 1292; Figure 10, U.S. Geological Survey Bulletin 1292 (revised edition). #1:/Mount Rainier National Park/cdr00005 ID. Crandell, D.R. 5ct Mount Rainier National Park, Washington. The yellowish-orange rinds on these stones of gray volcanic rocks are the result of weathering over a long period of time. Weathered rinds like these, but about half as thick, are present on stones near the surface of the Hayden Creek Drift. #1:/Mount Rainier National Park/cdr00006 ID. Crandell, D.R. 6ct Mount Rainier National Park, Washington. A pumice layer from Mount Mazama (Crater Lake) forms a thin yellow band at the base of the yellowish-orange mudflow that blankets Paradise Park. This outcrop is at Ricksecker Point and its height above the floor of the adjacent Paradise River Valley indicates that the mudflow was temporarily at least 800 feet deep here. #1:/Mount Rainier National Park/cdr00007 ID. Crandell, D.R. 7ct Mount Rainier National Park, Washington. Breadcrust bomb on the left shows a typical cracked and segmented surface formed during cooling. The other bomb is broken open to show the black bubbly interior. The bombs are about 10 inches in diameter. #1:/Lassen Volcanic National Park/cdr00008 ID. Crandell, D.R. 8ct Lassen Volcanic National Park, California. Moraines of the late Tioga age on the north side of Reading Peak at an altitude of about 8200 feet. View is north. Circa 1969. Figure 2, U.S. Geological Survey Professional Paper 800-C. #1:/Lassen Volcanic National Park/cdr00009 ID. Crandell, D.R. 9ct Lassen Volcanic National Park, California. Moraine of the late Tioga age on the southeast side of Lassen Peak at an altitude of about 8,940 feet. Circa 1969. Figure 3, U.S. Geological Survey Professional Paper 800-C. #1:/Lassen Volcanic National Park/cdr00010 ID. Crandell, D.R. 10ct Lassen Volcanic National Park, California. Lateral moraines of the late Tioga age flanking Last Creek on the northeast side of Lassen Peak. Circa 1969. Figure 4, U.S. Geological Survey Professional Paper 800-C. #1:/Mount Rainier National Park/cdr00011 ID. Crandell, D.R. 11ct Mount Rainier National Park, Washington. An avalanche deposit of yellowish- orange clay and rock debris lies on top of Tahoma Glacier on the west side of Mount Rainier. The avalanche originated in rockfalls at the cliffs at the upper left and slid down to the end of the glacier. The cliffs form the headwall of Sunset Amphitheater. Point Success is the peak at the right. The front of the glacier, in the foreground, is about 200 feet high. Frontispiece, U.S. Geological Survey Bulletin 1288. #1:/Mount Rainier National Park/cdr00012 ID. Crandell, D.R. 12ct Mount Rainier National Park, Washington. Layers of pumice on the floor of a cirque near Paradise Park. The yellow bed at the bottom is layer 0, which was erupted by Mount Mazama volcano at the site of Crater Lake, Oregon, about 6,600 years ago. The yellowish-brown layer a few inches above layer 0 is layer D, a pumice that was erupted by Mount Rainier between 5,800 and 6,600 years ago. The light yellowish-brown pumice bed at the top of the outcrop is layer Y which originated at Mount Saint Helens volcano between 3,250 and 4,000 years ago. Photo by D. Mullineaux. Figure 7, U.S. Geological Survey Bulletin 1292; Figure 6, U.S. Geological Survey Bulletin 1292 (revised edition). #1:/Mount Rainier National Park/cdr00013 ID. Crandell, D.R. 13ct Mount Rainier National Park, Washington. Old drift on the north side of Glacier Basin. The geologic formations, in order of decreasing age, are: 1, bedrock much older than Mount Rainier; 2, mudflows which came from an old Mount Rainier volcano; 3, old drift which consists mostly of very bouldery till; 4, an old andesite lava flow from Mount Rainier; 5, red volcanic rubble from Mount Rainier; 6, a younger andesite lava flow from Mount Rainier; and 7, an andesite dike. The age relation of the dike to the younger lava flow is not known. The yellow deposit in the right foreground is a Garda moraine of Inter Glacier; it is about 200 feet high and consists almost wholly of Osceola Mudflow which was eroded from the floor of the basin and redeposited by the glacier. The deposits in the left foreground and middle distance are alluvium younger than the moraine. Figure 5, U.S. Geological Survey Bulletin 1288. #1:/Mount Rainier National Park/cdr00014 ID. Crandell, D.R. 14ct Mount Rainier National Park, Washington. Bouldery till, exposed in a gully on the north side of Glacier Basin, is part of the old drift. The boulders and smaller stones of various colors in the till are derived from the bedrock that underlies the volcano. The stones are contained in a very hard and compact matrix of brownish-gray silt and sand. Figure 6, U.S. Geological Survey Bulletin 1288. #1:/Mount Rainier National Park/cdr00016 ID. Crandell, D.R. 16ct Mount Rainier National Park, Washington. The protalus rampart on the north side of Sunrise Ridge is separated from the partly vegetated talus on the left by a depression 5 to 6 feet deep and 20 to 30 feet wide. A thick wedge-shaped snow bank blanketed the talus and the depression when the arcuate rampart was formed. Figure 11, U.S. Geological Survey Bulletin 1288. #1:/Mount Rainier National Park/cdr00017 ID. Crandell, D.R. 17ct Mount Rainier National Park, Washington. The Osceola Mudflow is exposed on the south bank of Inter Fork. Slope wash from the bouldery yellow mudflow has nearly hidden the underlying gray Evans Creek till, which can be seen at the lower left. Figure 13, U.S. Geological Survey Bulletin 1288. #1:/Mount Rainier National Park/cdr00018 ID. Crandell, D.R. 18ct Mount Rainier National Park, Washington. About 1 mile southwest of Panhandle Gap at an altitude of 7,500 feet. Pumice layer C forms a thin brown veneer on the drift in the foreground and on the Burroughs Mountain moraine in the center. This pumice was erupted by Mount Rainier between 2,150 and 2,500 years ago. The Garda moraine of the Fryingpan Glacier at the left has no pumice on it and, thus, is younger. The large boulder in the middle foreground is about 6 feet long. Figure 14, U.S. Geological Survey Bulletin 1288. #1:/Mount Rainier National Park/cdr00023 ID. Crandell, D.R. 23ct Mount Rainier National Park, Washington. Eunice Lake, northwest of Mount Rainier. The lake lies in a small bedrock basin that was scoured out by a glacier between about 15,000 and 20,000 years ago. The rounded green slopes at the far edge of the lake are underlain by rock that has been smoothed and grooved by glacier ice. This side of Mount Rainier rises to Liberty Cap which hides the true summit of the volcano. #1:/Mount Rainier National Park/cdr00024 ID. Crandell, D.R. 24ct Mount Rainier National Park, Washington. Outcrop of gray to brown sandstone and dark gray to black coaly shale in the Puget Group along the Mowich Lake Road. Figure 1, U.S. Geological Survey Bulletin 1292; Figure 1, U.S. Geological Survey Bulletin 1292 (revised edition). #1:/Mount Rainier National Park/cdr00025 ID. Crandell, D.R. 25ct Mount Rainier National Park, Washington. Pumice layer C, which consists of light brown fragments, lies at the ground surface over much of the eastern part of the park. Mount Rainier is in the background. Figure 10, U.S. Geological Survey Bulletin 1292; Figure 9, U.S. Geological Survey Bulletin 1292 (revised edition). #1:/Mount Rainier National Park/cdr00026 ID. Crandell, D.R. 26ct Mount Rainier National Park, Washington. Rock-glacial deposit (light gray rubble beyond the brown slopes in the foreground) at The Palisades, which was formed about 11,000 years ago when the climate was colder than it is today. Rocks fell from the cliffs in such great quantity that a small glacier in front of the cliffs consisted of more rock debris than ice. The melting of the ice left a mass of broken rock several hundred feet thick which covers about 80 acres. Figure 18, U.S. Geological Survey Bulletin 1292 (revised edition). #1:/Mount Rainier National Park/cdr00027 ID. Crandell, D.R. 27ct Mount Rainier National Park, Washington. Avalanche deposits in the White River valley. The rockfalls and avalanches from Little Tahoma Peak formed a mass of reddish-gray debris that contrasts with the darker gray glacial debris deposited by Emmons Glacier within the last century. The avalanche deposits are about 1,500 feet across at their widest point. Figure 20, U.S. Geological Survey Bulletin 1292; Figure 19, U.S. Geological Survey Bulletin 1292 (revised edition). #1:/Lassen Volcanic National Park/cdr00029 ID. Crandell, D.R. 29ct Lassen Volcanic National Park, California. North side of Lassen Peak (highest peak in the center) and Chaos Crags on the right, viewed from Prospect Peak. 1970. #1:/Lassen Volcanic National Park/cdr00030 ID. Crandell, D.R. 30ct Lassen Volcanic National Park, California. Northeast side of Lassen Peak on the left and Chaos Crags on the right, viewed from Cinder Cone. 1969. #1:/Lassen Volcanic National Park/cdr00031 ID. Crandell, D.R. 31ct Lassen Volcanic National Park, California. South side of Lassen Peak, viewed from Diamond Peak. Loomis Peak on the far left. 1981. #1:/Lassen Volcanic National Park/cdr00032 ID. Crandell, D.R. 32ct Lassen Volcanic National Park, California. South side of Lassen Peak. Little Hot Springs Valley in the foreground. 1981. #1:/Lassen Volcanic National Park/cdr00033 ID. Crandell, D.R. 33ct Lassen Volcanic National Park, California. Northeast side of Lassen Peak, showing the area devastated by mudflows and a lateral blast in 1915. 1977. #1:/Lassen Volcanic National Park/cdr00034 ID. Crandell, D.R. 34ct Lassen Volcanic National Park, California. Northeast side of Lassen Peak, showing the area devastated by mudflows and a lateral blast in 1915. 1977. #1:/Lassen Volcanic National Park/cdr00035 ID. Crandell, D.R. 35ct Lassen Volcanic National Park, California. Northeast side of Lassen Peak. The area in the foreground was devastated by a lateral blast in 1915. 1968. #1:/Lassen Volcanic National Park/cdr00036 ID. Crandell, D.R. 36ct Lassen Volcanic National Park, California. Northward from the summit of Lassen Peak, showing the area devastated by a lateral blast in 1915. 1967. #1:/Lassen Volcanic National Park/cdr00037 ID. Crandell, D.R. 37ct Lassen Volcanic National Park, California. Rotted logs lying on the ground in the devastated area point toward Lassen Peak in the background. The trees were knocked down by a lateral blast in 1915. 1970. #1:/Lassen Volcanic National Park/cdr00038 ID. Crandell, D.R. 38ct Lassen Volcanic National Park, California. West side of Lassen Peak. At the center of the summit is a short lava flow of black dacite which was erupted in 1915. 1971. #1:/Lassen Volcanic National Park/cdr00039 ID. Crandell, D.R. 39ct Lassen Volcanic National Park, California. West side of Lassen Peak. At the center of the summit is a short lava flow of black dacite which was erupted in 1915. #1:/Lassen Volcanic National Park/cdr00040 ID. Crandell, D.R. 40ct Lassen Volcanic National Park, California. Summit shows the surface of the lava flow erupted in 1915. 1967. #1:/Lassen Volcanic National Park/cdr00042 ID. Crandell, D.R. 42ct Lassen Volcanic National Park, California. Area of solfatarized rock at the summit of Lassen Peak. 1967. #1:/Lassen Volcanic National Park/cdr00043 ID. Crandell, D.R. 43ct Lassen Volcanic National Park, California. North crater at the summit of Lassen Peak, with an area of solfatarized rock. Chaos Crags in the background. 1967. #1:/Lassen Volcanic National Park/cdr00044 ID. Crandell, D.R. 44ct Lassen Volcanic National Park, California. Chaos Crags, viewed from the south. Small craters in the foreground predate the Chaos Crags domes. 1977. #1:/Lassen Volcanic National Park/cdr00045 ID. Crandell, D.R. 45ct Lassen Volcanic National Park, California. East side of Chaos Crags domes. 1977. #1:/Lassen Volcanic National Park/cdr00047 ID. Crandell, D.R. 47ct Lassen Volcanic National Park, California. Chaos Crags domes, viewed from the west. Deposits of the Chaos Jumbles rockfall avalanche in the foreground. 1965. #1:/Lassen Volcanic National Park/cdr00049 ID. Crandell, D.R. 49ct Lassen Volcanic National Park, California. Chaos Crags domes, viewed from the west. Deposits of the Chaos Jumbles rockfall avalanche in the foreground. 1974. #1:/Lassen Volcanic National Park/cdr00050 ID. Crandell, D.R. 50ct Lassen Volcanic National Park, California. Chaos Crags domes, viewed from the north. Chaos Jumbles rockfall avalanche deposit extends to the right (west), viewed from the base of Chaos Crags. In the foreground is a group of late Pleistocene(?) domes with a forest cover. 1977. #1:/Lassen Volcanic National Park/cdr00051 ID. Crandell, D.R. 51ct Lassen Volcanic National Park, California. Top of Chaos Crags domes. View is south. 1977. #1:/Lassen Volcanic National Park/cdr00052 ID. Crandell, D.R. 52ct Lassen Volcanic National Park, California. West from the top of Chaos Crags Domes, showing the area of the Chaos Jumbles rockfall avalanche. 1969. #1:/Lassen Volcanic National Park/cdr00053 ID. Crandell, D.R. 53ct Lassen Volcanic National Park, California. Northwest side of Chaos Crags, showing the scarp left by the Chaos Jumble rockfall avalanche. 1969. #1:/Lassen Volcanic National Park/cdr00054 ID. Crandell, D.R. 54ct Lassen Volcanic National Park, California. Bumpass Hell thermal area, looking east. 1967. See also photo cdr00055. #1:/Lassen Volcanic National Park/cdr00055 ID. Crandell, D.R. 55ct Lassen Volcanic National Park, California. Bumpass Hell thermal area, looking east. 1969. See also photo cdr00054. #1:/Lassen Volcanic National Park/cdr00056 ID. Crandell, D.R. 56ct Lassen Volcanic National Park, California. Fumaroles and hot pools in Bumpass Hell. 1969. #1:/Lassen Volcanic National Park/cdr00057 ID. Crandell, D.R. 57ct Lassen Volcanic National Park, California. Cinder Cone and lava flow which was erupted at the base of the cone. 1977. #1:/Lassen Volcanic National Park/cdr00058 ID. Crandell, D.R. 58ct Lassen Volcanic National Park, California. Lava flows at the base of the Cinder Cone. One flow is covered with thick cinders (yellowish brown area); the other flow is black (no cinders). 1977. #1:/Crandell D.R. Collection/cdr00066 ID. Crandell, D.R. 66 Mudflow levees on bank of Pierre shale near Pierre. South Dakota. 1950. #1:/Mount Rainier National Park/cdr00085 ID. Crandell, D.R. 85ct Mount Rainier National Park, Washington. Willis Wall on the north side of Mount Rainier. View is east. Little Tahoma Peak is at the left. Columbia Crest is at the summit of the volcano. 1964. #1:/Mount Rainier National Park/cdr00087 ID. Crandell, D.R. 87ct Mount Rainier National Park, Washington. Summit cone and crater of Mount Rainier. View is southwest. Columbia Crest is at the right. The glaciers are the upper parts of Ingraham (left), Emmons (center) and Winthrop (right). 1964. #1:/Mount Rainier National Park/cdr00088 ID. Crandell, D.R. 88ct Mount Rainier National Park, Washington. South of Little Tahoma Peak behind Steamboat Prow on the northeast flank of Mount Rainier. 1964. #1:/Mount Rainier National Park/cdr00089 ID. Crandell, D.R. 89ct Mount Rainier National Park, Washington. North side of Little Tahoma Peak from an altitude of about 13,000 feet, showing the scar of a rockfall that occurred in 1963. 1964. #1:/Mount Rainier National Park/cdr00090 ID. Crandell, D.R. 90ct Mount Rainier National Park, Washington. Southeast side of Mount Rainier, showing Point Success on the left and the summit cone on the right. Little Tahoma Peak on the far right. 1964. #1:/Mount Rainier National Park/cdr00091 ID. Crandell, D.R. 91ct Mount Rainier National Park, Washington. South side of Mount Rainier. Nisqually Glacier in the center, descending from the summit ice fields. 1969. #1:/Mount Rainier National Park/cdr00092 ID. Crandell, D.R. 92ct Mount Rainier National Park, Washington. Summit cone of Mount Rainier on the right. Columbia Crest on the left. Tahoma Glacier in the center, descending from the summit ice fields. 1980. #1:/Mount Rainier National Park/cdr00093 ID. Crandell, D.R. 93ct Mount Rainier National Park, Washington. Upper west flank of Mount Rainier, showing upper Tahoma Glacier. 1969. #1:/Mount Rainier National Park/cdr00094 ID. Crandell, D.R. 94ct Mount Rainier National Park, Washington. Summit of Mount Rainier, viewed from the northwest, showing the summit cone and the upper part of Tahoma Glacier, descending the west flank of the volcano from the summit ice fields. 1969. #1:/Mount Rainier National Park/cdr00095 ID. Crandell, D.R. 95ct Mount Rainier National Park, Washington. Summit of Mount Rainier, showing the summit craters. View is northeast. 1969. #1:/Mount Rainier National Park/cdr00096 ID. Crandell, D.R. 96ct Mount Rainier National Park, Washington. Summit of Mount Rainier, showing the west side of the summit cone. Bare areas on the cone are caused by volcanic heat. 1969. #1:/Mount Rainier National Park/cdr00098 ID. Crandell, D.R. 98ct Mount Rainier National Park, Washington. North side of Mount Rainier, viewed from Grand Park (foreground). From left to right: Little Tahoma Peak, Emmons Glacier, Steamboat Prow, Winthrop Glacier, Willis Wall, and Carbon Glacier. On the skyline at center, the summit cone is on the left, Columbia Crest on the right. 1963. #1:/Mount Rainier National Park/cdr00100 ID. Crandell, D.R. 100ct Mount Rainier National Park, Washington. South side of Mount Rainier, viewed from Tatoosh Range. Nisqually Glacier in the center. 1962. #1:/Mount Rainier National Park/cdr00102 ID. Crandell, D.R. 102ct Mount Rainier National Park, Washington. South side of Mount Rainier, viewed from Kautz Creek Valley. 1961. #1:/Mount Rainier National Park/cdr00104 ID. Crandell, D.R. 104ct Mount Rainier National Park, Washington. West side of Mount Rainier, viewed from Gobbler's Knob, 13 kilometers to the west-southwest. Tahoma Glacier in the center. 1961. #1:/Mount Rainier National Park/cdr00105 ID. Crandell, D.R. 105ct Mount Rainier National Park, Washington. Echo Rock (left) and Observation Rock (right) on the northwest side of Mount Rainier. View is southwest. Carbon Glacier in the foreground. 1963. #1:/Mount Rainier National Park/cdr00106 ID. Crandell, D.R. 106ct Mount Rainier National Park, Washington. Northwest across the northeast flank of Mount Rainier from near Panhandle Gap. Steamboat Prow is at left center with Emmons Glacier at its base. Bare areas in the center have been exposed by glacier retreat during the 20th century. 1962. #1:/Mount Rainier National Park/cdr00107 ID. Crandell, D.R. 107ct Mount Rainier National Park, Washington. Upper southeast flank of Mount Rainier, showing Cowlitz Glacier(left) and Ingraham Glacier(right). Little Tahoma Peak at the upper right. 1962. #1:/Mount Rainier National Park/cdr00108 ID. Crandell, D.R. 108ct Mount Rainier National Park, Washington. Nisqually Glacier, showing crevasses, flow lines, and lateral moraines. View is northeast. 1962. #1:/Mount Rainier National Park/cdr00110 ID. Crandell, D.R. 110ct Mount Rainier National Park, Washington. Glacial deposits of Hayden Creek age (next-to-last major glaciation) on ridge top south of Burnt Park, 16 kilometers northeast of Mount Rainier's summit. 1960. #1:/Mount Rainier National Park/cdr00111 ID. Crandell, D.R. 111ct Mount Rainier National Park, Washington. Glacial deposits of the last major glaciation on the ridge at Mildred Point on the south side of Mount Rainier. 1963. #1:/Mount Rainier National Park/cdr00112 ID. Crandell, D.R. 112ct Mount Rainier National Park, Washington. Lateral moraine of the last major glaciation at Ricksecker Point on the south side of Mount Rainier. 1972. #1:/Mount Rainier National Park/cdr00113 ID. Crandell, D.R. 113ct Mount Rainier National Park, Washington. Rock glacier deposit dating from a late part of the last major glaciation, southwest of Palisades Lake, northeast of Mount Rainier. Mount Rainier is partially visible in the left background. 1963. See also photo cdr00114. #1:/Mount Rainier National Park/cdr00114 ID. Crandell, D.R. 114ct Mount Rainier National Park, Washington. Rock glacier deposit dating from a late part of the last major glaciation, southwest of Palisades Lake, northeast of Mount Rainier. Mount Rainier is partially visible in the left background. 1967. See also photo cdr00113. #1:/Mount Rainier National Park/cdr00115 ID. Crandell, D.R. 115ct Mount Rainier National Park, Washington. North down Carbon Glacier on the northwest side of Mount Rainier. Lateral moraine of late Holocene age on the right. 1952. #1:/Mount Rainier National Park/cdr00116 ID. Crandell, D.R. 116ct Mount Rainier National Park, Washington. Protalus ramparts, dating from a late part of the last major glaciation, along the north base of Sunrise Ridge, northeast of Mount Rainier. Sunrise Lake in the distance. 1967. #1:/Mount Rainier National Park/cdr00117 ID. Crandell, D.R. 117ct Mount Rainier National Park, Washington. Terminal and lateral moraines of the Ohanapecosh Glacier on the southeast side of Mount Rainier. The moraines were formed during late Holocene time when the glacier occupied the area that is now bare. 1962. #1:/Mount Rainier National Park/cdr00119 ID. Crandell, D.R. 119ct Mount Rainier National Park, Washington. Recessional moraine of Holocene age near Williwakas Glacier on the south side of Mount Rainier. Tatoosh Range and Mount Adams in the background. 1962. #1:/Mount Rainier National Park/cdr00120 ID. Crandell, D.R. 120ct Mount Rainier National Park, Washington. Terminus of Fryingpan Glacier on the east side of Mount Rainier. 1962. #1:/Mount Rainier National Park/cdr00121 ID. Crandell, D.R. 121ct Mount Rainier National Park, Washington. Terminus of Tahoma Glacier on the west side of Mount Rainier. The yellow deposit on and beyond the glacier is altered rock debris that avalanched onto the glacier from Sunset Amphitheater some time between 1910 and 1930. 1965. #1:/Mount Rainier National Park/cdr00122 ID. Crandell, D.R. 122ct Mount Rainier National Park, Washington. Terminus of Tahoma Glacier on the west side of Mount Rainier. The yellow deposit on and beyond the glacier is altered rock debris that avalanched onto the glacier from Sunset Amphitheater some time between 1910 and 1930. 1966. #1:/Mount Rainier National Park/cdr00123 ID. Crandell, D.R. 123ct Mount Rainier National Park, Washington. Terminus of Kautz Glacier, viewed from Mildred Point on the south side of Mount Rainier. 1962. #1:/Mount Rainier National Park/cdr00124 ID. Crandell, D.R. 124 Mount Rainier National Park, Washington. Rockfall-avalanche deposits. Note the avalanche debris on Emmons Glacier below Little Tahoma Peak. The wooded ridge in the center of the lower valley is a terminal moraine of Emmons Glacier formed between about 1700 and the early 1900's. The end of an avalanche tongue down-valley from the terminal moraine is indicated by a dashed line. Photo by A.S. Post. Figure 2, U.S. Geological Survey Bulletin 1221-A. #1:/Mount Rainier National Park/cdr00125 ID. Crandell, D.R. 125ct Mount Rainier National Park, Washington. Terminus of Nisqually Glacier, viewed from Nisqually Vista on the south side of Mount Rainier. 1964. #1:/Mount Rainier National Park/cdr00126 ID. Crandell, D.R. 126ct Mount Rainier National Park, Washington. Terminus of Nisqually Glacier in 1970. See also photos cdr00127 and cdr00128. #1:/Mount Rainier National Park/cdr00127 ID. Crandell, D.R. 127ct Mount Rainier National Park, Washington. Terminus of Nisqually Glacier in 1978. See also photos cdr00126 and cdr00128. #1:/Mount Rainier National Park/cdr00128 ID. Crandell, D.R. 128ct Terminus of Nisqually Glacier in 1979. Mount Rainier National Park. Pierce County, Washington. #1:/Mount Rainier National Park/cdr00129 ID. Crandell, D.R. 129ct Mount Rainier National Park, Washington. Terminus of North Puyallup Glacier on the west side of Mount Rainier, viewed with a normal lens. 1966. See also photo cdr00130. #1:/Mount Rainier National Park/cdr00130 ID. Crandell, D.R. 130ct Mount Rainier National Park, Washington. Terminus of North Puyallup Glacier on the west side of Mount Rainier, viewed with a telephoto lens. 1966. See also photo cdr 00129. #1:/Mount Rainier National Park/cdr00131 ID. Crandell, D.R. 131ct Mount Rainier National Park, Washington. Terminus of South Mowich Glacier on the west side of Mount Rainier. 1966. #1:/Mount Rainier National Park/cdr00132 ID. Crandell, D.R. 132ct Mount Rainier National Park, Washington. East toward North Mowich Glacier from Division Rock on the northwest side of Mount Rainier. 1966. #1:/Mount Rainier National Park/cdr00134 ID. Crandell, D.R. 134ct Mount Rainier National Park, Washington. Terminus of Carbon Glacier on the north side of Mount Rainier. 1963. #1:/Mount Rainier National Park/cdr00135 ID. Crandell, D.R. 135ct Mount Rainier National Park, Washington. Terminus of Emmons Glacier on the northeast side of Mount Rainier. 1963. #1:/Mount Rainier National Park/cdr00136 ID. Crandell, D.R. 136ct Mount Rainier National Park, Washington. Basaltic Falls on the east side of the Cowlitz River canyon on the southeast side of Mount Rainier. The waterfall cascades over old andesite lava flows from Mount Rainier. 1962. #1:/Mount Rainier National Park/cdr00138 ID. Crandell, D.R. 138ct Mount Rainier National Park, Washington. Tahoma Creek Campground in Tahoma Creek valley on the southwest side of Mount Rainier before it was covered by mudflows. 1966. See also photo cdr00139. #1:/Mount Rainier National Park/cdr00139 ID. Crandell, D.R. 139ct Mount Rainier National Park, Washington. Tahoma Creek Campground after it was covered by mudflows on August 31, 1967. 1967. See also photo cdr00138. #1:/Mount Rainier National Park/cdr00140 ID. Crandell, D.R. 140ct Mount Rainier National Park, Washington. Brown pumice erupted by Mount Rainier about 2200 years ago, viewed from near Yakima Park on the northeast side of Mount Rainier. 1968. #1:/Mount Rainier National Park/cdr00141 ID. Crandell, D.R. 141ct Mount Rainier National Park, Washington. Southwest of the White River valley on the northeast side of Mount Rainier. Rock debris was deposited in 1963 by avalanches on Emmons Glacier (center). It extended about 4 miles from the north side of Little Tahoma Peak to a point on the valley floor just to the right of the dead snag (lower left). The forested area on the valley floor is a terminal moraine of the Emmons Glacier formed within the last few centuries. 1964. #1:/Mount Rainier National Park/cdr00142 ID. Crandell, D.R. 142ct Mount Rainier National Park, Washington. Toward Little Tahoma Peak, showing avalanche deposits on the top of Emmons Glaciers. 1964. #1:/Mount Rainier National Park/cdr00143 ID. Crandell, D.R. 143 Mount Rainier National Park, Washington. Hayden Creek till at an altitude of about 1,900 meters northwest of The Palisades. The till is at least 30 meters thick and is at the crest of a ridge between adjacent cirques that were subsequently occupied and largely excavated by Evans Creek glaciers. Circa 1964. Figure 13, U.S. Geological Survey Professional Paper 847. #1:/Mount Rainier National Park/cdr00144 ID. Crandell, D.R. 144ct Mount Rainier National Park, Washington. Northeast down the White River valley, showing rockfall-avalanche debris (reddish) from Little Tahoma Peak, overlying and adjacent to moraines (gray) formed by Emmons Glacier. 1964. #1:/Mount Rainier National Park/cdr00145 ID. Crandell, D.R. 145 Mount Rainier National Park, Washington. Outcrop along the highway to Yakima Park shows a stratigraphic sequence of Evans Creek till on top of a deposit of angular rock fragments that represents an old talus. A man stands at an outcrop of pumice which contains charcoal more than 38,000 years old. The pumice overlies Hayden Creek till in outcrops to the right of, and downslope from, the road. Circa 1964. Figure 15, U.S. Geological Survey Professional Paper 847. #1:/Mount Rainier National Park/cdr00147 ID. Crandell, D.R. 147 Mount Rainier National Park, Washington. The hanging valley of Ranger Creek lies about 240 meters above the floor of the Carbon River valley north of Mount Rainier. The hanging valley is at an altitude of about 900 meters and heads in a composite cirque at an altitude of 1,360 to 1,500 meters on the northeast side of Tolmie Peak. Circa 1964. Figure 17, U.S. Geological Survey Professional Paper 847. #1:/Mount Rainier National Park/cdr00148 ID. Crandell, D.R. 148 Mount Rainier National Park, Washington. Evans Creek till on top of a lava flow (exposed at left center), viewed from Mildred Point on the south side of Mount Rainier. The Kautz Creek glacier was at least 240 meters thick when the till was deposited on this ridge between the Kautz Creek valley (left) and Van Trump Park (right). Figure 18, U.S. Geological Survey Professional Paper 874. #1:/Mount Rainier National Park/cdr00149 ID. Crandell, D.R. 149 Mount Rainier National Park, Washington. Evans Creek till forms a lateral moraine at Ricksecker Point on the south side of Mount Rainier. The Nisqually River Glacier was about 300 meters thick when this moraine was formed. Circa 1964. Figure 19, U.S. Geological Survey Professional Paper 847. #1:/Mount Rainier National Park/cdr00152 ID. Crandell, D.R. 152 Mount Rainier National Park, Washington. These arcuate end moraines of a former small cirque glacier are the type locality of the McNeeley Drift. The cirque is on the north slope of the Sourdough Mountains seven-tenths of a kilometer south of McNeeley Peak and almost directly north of the Sunrise Visitor Center at Yakima Park. Pumice layer R, which is more than 8,750 years old, overlies the outermost McNeeley moraine at this locality. Circa 1964. Figure 23, U.S. Geological Survey Professional Paper 847. #1:/Mount Rainier National Park/cdr00153 ID. Crandell, D.R. 153 Mount Rainier National Park, Washington. Forested McNeeley and bare Garda moraines of a former cirque glacier at the north end of Old Desolate, north of Mount Rainier. The McNeeley glacier reached about 300 meters farther than did the Garda glacier. Circa 1964. Figure 24, U.S. Geological Survey Professional Paper 847. #1:/Mount Rainier National Park/cdr00154 ID. Crandell, D.R. 154 Mount Rainier National Park, Washington. Terminal moraine of a McNeeley cirque glacier at Tipsoo Lake, east of Mount Rainier. View is southeast. Tipsoo Lake (foreground) lies in a glacially scoured bedrock basin that was formed during Evans Creek time. The small pond just beyond the highway is dammed by the McNeeley moraine, and a wooded area upslope from the pond is underlain by a small rock glacier deposit of McNeeley age which formed when the cirque glacier shrank in volume. Circa 1964. Figure 26, U.S. Geological Survey Professional Paper 847. #1:/Mount Rainier National Park/cdr00155 ID. Crandell, D.R. 155 Mount Rainier National Park, Washington. Rock glacier deposit of McNeeley age in the east-facing cirque at The Palisades, northeast of Mount Rainier. The top of the deposit is at an altitude of about 1,800 meters. Circa 1964. Figure 27, U.S. Geological Survey Professional Paper 847. #1:/Mount Rainier National Park/cdr00156 ID. Crandell, D.R. 156 Mount Rainier National Park, Washington. Surface of the rock glacier deposit at The Palisades. The largest blocks in the foreground are about 3 meters across. Circa 1964. Figure 28, U.S. Geological Survey Professional Paper 847. See also photo cdr00157. #1:/Mount Rainier National Park/cdr00157 ID. Crandell, D.R. 157 Mount Rainier National Park, Washington. Surface of the rock glacier deposit at The Palisades. The largest blocks in the foreground are about 3 meters across. Circa 1964. Figure 28, U.S. Geological Survey Professional Paper 847. See also photo cdr00156. #1:/Mount Rainier National Park/cdr00158 ID. Crandell, D.R. 158 Mount Rainier National Park, Washington. Rock-glacier deposit in a north- facing cirque on the east side of Mount Fremont. The altitude of the deposit is about 1,925 meters where it is crossed by the trail in the foreground. Circa 1964. Figure 29, U.S. Geological Survey Professional Paper 847. #1:/Mount Rainier National Park/cdr00159 ID. Crandell, D.R. 159 Mount Rainier National Park, Washington. Protalus rampart on the north side of Sunrise Ridge, northwest of Mount Rainier, at an altitude of about 1,780 meters. The depression between the protalus rampart and the talus on the left is about 2 meters deep and 7 to 10 meters wide. Circa 1964. Figure 30, U.S. Geological Survey Professional Paper 847. #1:/Mount Rainier National Park/cdr00160 ID. Crandell, D.R. 160 Mount Rainier National Park, Washington. Garda terminal moraine of Emmons Glacier in the White River valley. The outermost part of the moraine was formed some time before 1700, but after deposition of the W pumice 450 years ago. Much of the moraine was buried by avalanches of rock debris from Little Tahoma Peak in 1963. View is northeast. 1958. Figure 31, U.S. Geological Survey Professional Paper 847. #1:/Mount Rainier National Park/cdr00161 ID. Crandell, D.R. 161 Mount Rainier National Park, Washington. Garda recessional moraines of Stevens Glacier northwest of Fairy Falls. View is southwest. Circa 1964. Figure 32, U.S. Geological Survey Professional Paper 847. #1:/Mount Rainier National Park/cdr00162 ID. Crandell, D.R. 162 Mount Rainier National Park, Washington. Sorted circle in Garda till on the floor of The Paradise cirque on the south side of Mount Rainier. This area is at an altitude of about 1,895 meters and was uncovered by Paradise Glacier some time within the last 450 years. The central part of the circle is relatively free of large stones; it is ringed by stones that lie in a depression 5 to 15 centimeters deep in the till. The tape is 32 centimeters long. Circa 1964. Figure 33, U.S. Geological Survey Professional Paper 847. #1:/Mount Rainier National Park/cdr00163 ID. Crandell, D.R. 163 Mount Rainier National Park, Washington. Stone stripes on Garda till at an altitude of about 1,910 meters on the cirque floor of Fryingpan Glacier. This area has become free of ice within the last 500 years. The ground slopes about 8 degrees away from the viewer, and the tape measure is about 66 centimeters long. Circa 1964. Figure 34, U.S. Geological Survey Professional Paper 847. #1:/Mount Rainier National Park/cdr00164 ID. Crandell, D.R. 164 Mount Rainier National Park, Washington. Stone stripes in volcanic ash and glacial drift on the west flank of the ridge between Skyscraper Mountain and Burroughs Mountain, northeast of Mount Rainier. Circa 1964. Figure 35, U.S. Geological Survey Professional Paper 847. #1:/Mount Rainier National Park/cdr00165 ID. Crandell, D.R. 165 Mount Rainier National Park, Washington. Sloping rubble sheet on the west flank of Mazama Ridge. Circa 1964. Figure 36, U.S. Geological Survey Professional Paper 847. #1:/Mount Rainier National Park/cdr00166 ID. Crandell, D.R. 166 Mount Rainier National Park, Washington. Platy fragments of a lava flow from Mount Rainier form a rubble sheet along the crest of a ridge near the Colonnade, west of the volcano. Circa 1964. Figure 37, U.S. Geological Survey Professional Paper 847. #1:/Mount Rainier National Park/cdr00167 ID. Crandell, D.R. 167 Mount Rainier National Park, Washington. Rubble rills on a west-facing slope about 160 meters northeast of Fairy Falls, southeast of Mount Rainier. Excavation shown in photo cdr00168 is located in the lowest lobe of the nearest rubble rill, which is 0.6 to 3.0 meters wide. Circa 1964. Figure 38, U.S. Geological Survey Professional Paper 847. #1:/Mount Rainier National Park/cdr00168 ID. Crandell, D.R. 168 Mount Rainier National Park, Washington. Excavation in the rubble rill shown in photo cdroo167. The unvegetated rubble is 15 to 30 centimeters thick and overlies a mixture of rock fragments and volcanic ash. Circa 1964. Figure 39, U.S. Geological Survey Professional Paper 847. #1:/Mount Rainier National Park/cdr00169 ID. Crandell, D.R. 169 Mount Rainier National Park, Washington. Rubble rill on the south side of a ridge 1.5 kilometers north of Mount Fremont, northeast of Mount Rainier. Circa 1964. Figure 40, U.S. Geological Survey Professional Paper 847. #1:/Mount Rainier National Park/cdr00170 ID. Crandell, D.R. 170 Mount Rainier National Park, Washington. Solifluction lobes in Holocene volcanic ash deposits on the northeast slope of Mount Fremont. Circa 1964. Figure 41, U.S. Geological Survey Professional Paper 847. #1:/Lassen Volcanic National Park/cdr00171 ID. Crandell, D.R. 171 Lassen Volcanic National Park, California. Ground surface west of the Chaos Crags is made up of a pavement of bread-crusted pumice blocks deposited by hot pyroclastic flows. Figure 3, page 52, Journal of Research of the U.S. Geological Survey, v.2, no.1. #1:/Lassen Volcanic National Park/cdr00172 ID. Crandell, D.R. 172 Lassen Volcanic National Park, California. Charcoal-bearing pyroclastic-flow deposit overlying an older, weathered pyroclastic-flow deposit in a roadcut near the west edge of the park. Figure 4, page 54, Journal of Research of the U.S. Geological Survey, v.2, no.1. #1:/Lassen Volcanic National Park/cdr00173 ID. Crandell, D.R. 173 Lassen Volcanic National Park, California. From the top of Lassen Peak northward across the Chaos Crags. Light-colored deposits at right center are tephra that probably was mostly erupted from a vent situated at the small lapilli cone at the south margin of the Chaos Crags domes. Figure 5, page 55, Journal of Research of the U.S. Geological Survey, v.2, no.1. #1:/Lassen Volcanic National Park/cdr00174 ID. Crandell, D.R. 174 Lassen Volcanic National Park, California. From the top of the rockfall scarp on the Chaos Crags westward across the Chaos Jumbles toward Manzanita Lake. Figure 6, page 46, Journal of Research of the U.S. Geological Survey, v.2, no.1. #1:/Lassen Volcanic National Park/cdr00175 ID. Crandell, D.R. 175 Lassen Volcanic National Park, California. Southeastward from the Lassen Park Road toward the reentrant formed in the Chaos Crags by rockfalls. The high rock mass on the right is the dome that was reported to be emitting steam and other gases in the mid-1800's. Rock debris of the Chaos Jumbles rockfall avalanche deposits is in the foreground. Figure 7, page 57, Journal of Research of the U.S. Geological Survey, v.2, no.1. #1:/Mount Rainier National Park/cdr00176 ID. Crandell, D.R. 176 Mount Rainier National Park, Washington. The summit cone of Mount Rainier is indented by two overlapping craters; the left one is about 1,300 feet in diameter. View is southeast toward Mount Adams. September 3, 1964. Figure 3, U.S. Geological Survey Bulletin 1238. #1:/Mount Rainier National Park/cdr00177 ID. Crandell, D.R. 177 Mount Rainier National Park, Washington. Pyroclastic deposits exposed in a roadcut at Yakima Park. Man is standing on a glacial drift directly overlain by layer R, which originated at Mount Rainier more than 8,750 years ago. The thin light-colored band is layer 0, which has been identified as ash that was erupted at Crater Lake, Oregon, about 6,600 years ago. The layer of rock fragments above layer 0 is an explosion rubble derived from Mount Rainier. Figure 4, U.S. Geological Survey Bulletin 1238. #1:/Mount Rainier National Park/cdr00178 ID. Crandell, D.R. 178 Mount Rainier National Park, Washington. Avalanche deposit at and on the terminus of Tahoma Glacier. Parts of the avalanche debris are a sticky yellow clay which is the product of hydrothermal alteration of rock within the volcano. The alteration evidently occurred in an old conduit of the volcano which is now exposed in cross section in the cliffs immediately left of the area where Tahoma Glacier spills down from the summit snowfields. The ice face in the center foreground is about 150 feet high. Figure 5, U.S. Geological Survey Professional Paper 677. #1:/Mount Rainier National Park/cdr00179 ID. Crandell, D.R. 179 Mount Rainier National Park, Washington. Mounds on the Greenwater lahar in the Buck Creek area. The mound at the right center consists wholly of angular blocks of granodiorite; it is about 25 feet high and 100 feet in diameter. Adjacent mounds consist mostly of material derived from Mount Rainier. Circa 1964. Figure 7, U.S. Geological Survey Professional Paper 677. #1:/Mount Rainier National Park/cdr00180 ID. Crandell, D.R. 180 Mount Rainier National Park, Washington. Mound on the Greenwater lahar consists of an andesite breccia which was derived from Mount Rainier and which has been extensively altered to a plastic yellow clay. Circa 1964. Figure 8, U.S. Geological Survey Professional Paper 677. #1:/Mount Rainier National Park/cdr00181 ID. Crandell, D.R. 181 Mount Rainier National Park, Washington. Breadcrust bombs from the block-and- ash flow in the South Puyallup River valley. The bomb on the right has been broken open to show the highly vesicular interior. Circa 1964. Figure 35, U.S. Geological Survey Professional Paper 677. #1:/Mount Rainier National Park/cdr00183 ID. Crandell, D.R. 183 Mount Rainier National Park, Washington. Lahar exposed near the mouth of Fryingpan Creek grading from sand- and pebble-sized material in the lower two- thirds to a well-sorted medium sand at the top. The pick head is at the contact of the lahar with an underlying fluvial sand deposit. Circa 1964. Figure 12, U.S. Geological Survey Professional Paper 677. #1:/Mount Rainier National Park/cdr00185 ID. Crandell, D.R. 185 Mount Rainier National Park, Washington. Outcrop of the Paradise lahar and an older lahar in a trench excavated for a retaining wall at the north edge of the visitor center at Paradise Park. Circa 1964. Figure 15, U.S. Geological Survey Professional Paper 677. #1:/Mount Rainier National Park/cdr00186 ID. Crandell, D.R. 186 Mount Rainier National Park, Washington. Lahar in a stream bank on the west side of the Nisqually River flood plain about a quarter of a mile southwest of Longmire. The lahar shown here is older than pyroclastic layer O. Circa 1964. Figure 16, U.S. Geological Survey Professional Paper 677. #1:/Mount Rainier National Park/cdr00187 ID. Crandell, D.R. 187 Mount Rainier National Park, Washington. Crudely stratified, poorly sorted fluvial gravel in lahar assemblage C, exposed in the west bank of the Nisqually River near the mouth of Van Trump Creek. The large granodiorite boulder at the upper right is about 11 feet long; the handle of the pick beneath the boulder is about 17 inches long. Circa 1964. Figure 18, U.S. Geological Survey Professional Paper 677. #1:/Mount Rainier National Park/cdr00188 ID. Crandell, D.R. 188 Mount Rainier National Park, Washington. Deposits in the west bank of Kautz Creek, about 0.35 mile downstream from the Wonderland Trail. The cobble and boulder gravel at the base is probably a fluvial deposit. It is overlain by a layer of duff and roots, above which is a lenticular lahar a few feet thick. Above the lahar, on the right side of photo cdr0188a, is a layer of roots and duff which includes pyroclastic layer W. Above this are other lahars and fluvial deposits. Circa 1964. Figure 19, U.S. Geological Survey, Professional Paper 677. Photos cdr00188 and cdr0188a form a panorama. #1:/Mount Rainier National Park/cdr00189 ID. Crandell, D.R. 189 Mount Rainier National Park, Washington. Bouldery surface of a pre-W lahar assemblage that underlies the floor of the Kautz Creek valley about 1 mile north of the Wonderland Trail crossing of Kautz Creek. Circa 1964. Figure 20, U.S. Geological Survey Professional Paper 677. #1:/Mount Rainier National Park/cdr00190 ID. Crandell, D.R. 190 Mount Rainier National Park, Washington. Lahars and fluvial sand and gravel deposited near the mouth of Kautz Creek in October 1947. Middle unit is fine and coarse lahars; upper and lower units are probably both fluvial deposits. Circa 1964. Figure 21, U.S. Geological Survey Professional Paper 677. #1:/Mount Rainier National Park/cdr00191 ID. Crandell, D.R. 191 Mount Rainier National Park, Washington. Flood in Kautz Creek channel at the entrance road. The character of the water surface and the muddiness of the water suggest that the flood was a "hyper-concentrated flow." The dead trees in the background were killed by the 1947 lahars and floods in the Kautz Creek valley. Photo by U.S. National Park Service, August 23, 196l. Figure 23, U.S. Geological Survey Professional Paper 677. #1:/Mount Rainier National Park/cdr00192 ID. Crandell, D.R. 192 Mount Rainier National Park, Washington. Banks of Kautz Creek about half a mile upstream from the Wonderland Trail shortly after the flood of August 23, 1961. The high discharge steepened and locally undercut streambanks. The sparsely vegetated areas on the terraces on both sides of the creek were covered by the lahars and flood of October 1947. Photo by U.S. National Park Service, 1961. Figure 24, U.S. Geological Survey Professional Paper 677. #1:/Mount Rainier National Park/cdr00193 ID. Crandell, D.R. 193 Mount Rainier National Park, Washington. South edge of Round Pass Mudflow along the Wonderland Trail at Indian Henrys Hunting Ground. The front of the mudflow is about 17 feet high. The surface on the right is underlain by thin Evans Creek Drift and bedrock and veneered with pyroclastic layer Y. The pumice is absent from the mudflow. Circa 1964. Figure 26, U.S. Geological Survey Professional Paper 677. #1:/Mount Rainier National Park/cdr00195 ID. Crandell, D.R. 195 Mount Rainier National Park, Washington. Lahar resting on top of fluvial cobble-and-boulder gravel in the Tahoma Creek valley. Separating the two deposits is 1/4 to 1/2-inch duff and pyroclastic layer W. Three more lahars occur in the stratigraphic interval between layer W and the fluvial gravel in outcrops out of view to the right. Circa 1964. Figure 29, U.S. Geological Survey Professional Paper 677. #1:/Mount Rainier National Park/cdr00196 ID. Crandell, D.R. 196 Mount Rainier National Park, Washington. Bouldery deposit left in Tahoma Creek picnic area (then a campground) on the evening of August 31, 1967. The unvegetated part of the Tahoma Creek flood plain is faintly visible in the background. September 1, 1967. Figure 30, U.S. Geological Survey Professional Paper 677. #1:/Mount Rainier National Park/cdr00197 ID. Crandell, D.R. 197 Mount Rainier National Park, Washington. Debris-covered surface of South Tahoma Glacier on the right. The channel down the middle of the glacier was carved by floods that issued from the icefall at right center in late August and early September 1967.. The glacier is about 500 feet wide near its terminus. Photo by Austin S. Post, September 18, 1967. Figure 31, U.S. Geological Survey Professional Paper 677. #1:/Mount Rainier National Park/cdr00198 ID. Crandell, D.R. 198 Mount Rainier National Park, Washington. Straight slanting area of dirty snow, formed by rockfall debris below Point Success, heads at a cliff where a steam vent was witnessed on September 23-24, 1967. The rockfall debris reaches down to the head of South Tahoma Glacier. Photo taken with a telephoto lens at Round pass. Photo by N.A. Bishop, U.S. National Park Service, October 8, 1967. Figure 32, U.S. Geological Survey Professional Paper 677. #1:/Mount Rainier National Park/cdr00199 ID. Crandell, D.R. 199 Mount Rainier National Park, Washington. Bomb-bearing block-and-ash flow deposit in an outcrop along the West Side Road near the South Puyallup River overlies a coarse lahar that does not contain any bombs. The contact is marked by a thin horizontal layer of light gray sand. Circa 1964. Figure 33, U.S. Geological Survey Professional Paper 677. #1:/Mount Rainier National Park/cdr00200 ID. Crandell, D.R. 200 Mount Rainier National Park, Washington. Outcrop of a relatively fine-grained facies of the bomb-bearing block-and-ash flow along the West Side Road near the South Puyallup River. A large breadcrust bomb is just left of the pick, but most other rock fragments are of dense rock. Circa 1964. Figure 34, U.S. Geological Survey Professional Paper 677. #1:/Mount Rainier National Park/cdr0109c ID. Crandell, D.R. 109ct Mount Rainier National Park, Washington. Lava flow overlying old glacial deposits at Ohanapecosh Park on the south side of Mount Rainier. 1970. #1:/Mount Rainier National Park/cdr0188a ID. Crandell, D.R. 188a Mount Rainier National Park, Washington. Deposits in the west bank of Kautz Creek, about 0.35 mile downstream from the Wonderland Trail. The cobble and boulder gravel at the base is probably a fluvial deposit. It is overlain by a layer of duff and roots, above which is a lenticular lahar a few feet thick. Above the lahar, on the right side of photo cdr0188a, is a layer of roots and duff which includes pyroclastic layer W. Above this are other lahars and fluvial deposits. Circa 1964. Figure 19, U.S. Geological Survey, Professional Paper 677. Photos cdr00188 and cdr0188a form a panorama. #1:/Crandell D.R. Collection/cdrb0006 ID. Crandell, D.R. 6bw Soil profile developed on alluvium of probable Yarmouth age at the Stroup gravel pit. Top of 6-inch ruler is at base of leached horizon. Light-colored material above leached horizon is spoil. South Dakota. ca. 1950. Figure 11 in U.S. Geological Survey. Professional paper 307. 1958. #1:/Mount Rainier National Park/cdrb0109 ID. Crandell, D.R. 109bw A large breadcrust bomb enclosed in a mudflow deposit that consists of a mixture of volcanic ash and rock fragments. The outcrop is on the south bank of the White River about half a mile downstream from the White River campground. Mount Rainier National Park, pierce County, Washington, ca. 1969. Published as figure 9 in U.S. Geological Survey. Bulletin 1292. 1969; figure 9 in U.S. Geological Survey. Professional paper 677. 1971; figure 7 in U.S. Geological Survey. Bulletin 1292. 1983. (Revised edition). #1:/Mount Rainier National Park/cdrb0110 ID. Crandell, D.R. 110bw Mount Rainier National Park, Washington. Four curved recessional moraines are spread over a distance of 2,000 feet on the valley floor of Fryingpan Creek. They were formed within the last few hundred years as Fryingpan Glacier lost volume and shrank back toward its present position above a line of cliffs. Circa 1967. Figure 15, U.S. Geological Survey Bulletin 1292; Figure 14, U.S. Geological Survey Bulletin 1292 (revised edition). #1:/Mount Rainier National Park/cdrb0111 ID. Crandell, D.R. 111bw Outcrop of light-gray welded tuff in the Stevens Ridge Formation along the road in Stevens Canyon. The angular dark-gray fragments in the welded tuff are chunks of pumice. Mount Rainier National Park. Lewis County, Washington, ca. 1967. Published as figure 2 in U.S. Geological Survey. Bulletin 1292. 1969; figure 2 in U.S. Geological Survey. Bulletin 1292. 1983. Revised edition. #1:/Mount Rainier National Park/cdrb0113 ID. Crandell, D.R. 113bw Mount Rainier National Park, Washington. Lateral moraine of rock debris at Ricksecker Point. It was formed by Nisqually Glacier when the glacier was at least 1,000 feet thick and about 15 miles longer than it is today. Circa 1967. Figure 17, U.S. Geological Survey Bulletin 1292; Figure 16, U.S. Geological Survey Bulletin 1292 (revised edition). #1:/Mount Rainier National Park/cdrb0114 ID. Crandell, D.R. 114bw Columns of dark-gray andesite at the east end of an old lava flow from Mount Rainier. This outcrop is near the point at which the highway to Yakima Park crosses Yakima Creek. Mount Rainier National Park. Pierce County, Washington. ca. 1967. Published as figure 6 in U.S. Geological Survey. Bulletin 1292. 1969; figure 5 in U.S. Geological Survey. Bulletin 1292. 1983. (Revised edition). #1:/Mount Rainier National Park/cdrb0115 ID. Crandell, D.R. 115bw The snow-covered lava cone lies in a depression 1.25 miles wide at the summit of the volcano. The cone was probably built about 2,000 years ago. Liberty Cap is to the left and Point Success is to the right. The cliffs below and to the right of Liberty Cap enclose Sunset Amphitheater. Mount Rainier National Park. Pierce County, Washington, ca. 1967. Published as figure 11 in U.S. Geological Survey. Bulletin 1292. 1969; figure 10 in U.S. Geological Survey. Bulletin 1292. 1983. (Revised edition). #1:/Mount Rainier National Park/cdrb0116 ID. Crandell, D.R. 116bw Mount Rainier National Park, Washington. The hummocky end moraine on the left still had blocks of ice buried in it when this picture was taken in 1954. The front of Emmons Glacier was near the left edge of the bare moraine in about 1900. Now the glacier ends 1 mile farther up-valley at the upper right. The valley floor and moraine were buried by an avalanche of rock debris from Little Tahoma Peak in 1963. Figure 19, U.S. Geological Survey Bulletin 1292; Figure 18, U.S. Geological Survey Bulletin 1292 (revised edition). #1:/Mount Rainier National Park/cdrb0117 ID. Crandell, D.R. 117bw Mount Rainier National Park, Washington. Yellowish-orange rinds on these stones of dark gray volcanic rocks are the result of weathering over a long period of time. Weathered rinds like these, but about half as thick, are present on stones near the surface of the Hayden Creek Drift. Circa 1967. Figure 8, U.S. Geological Survey Bulletin 1288. #1:/Mount Rainier National Park/cdrb0118 ID. Crandell, D.R. 118bw Mount Rainier National Park, Washington. Pumice layer 0 from Mount Mazama (Crater Lake) forms a thin yellow band at the base of the yellowish-orange mudflow that blankets Paradise Park. This outcrop is at Ricksecker Point and its height above the floor of the adjacent Paradise River Valley indicates that the mudflow was temporarily at least 800 feet deep here. Circa 1967. Figure 12, U.S. Geological Survey Bulletin 1288. #1:/Mount Rainier National Park/cdrb0119 ID. Crandell, D.R. 119bw Mount Rainier National Park, Washington. Breadcrust bomb on the left shows a typical cracked and segmented surface formed during cooling. The other bomb is broken open to show the black bubbly interior. The bombs are about 10 inches in diameter. Circa 1967. Figure 16, U.S. Geological Survey Bulletin 1288. #1:/Mount Rainier National Park/cdrb0120 ID. Crandell, D.R. 120bw Mount Rainier National Park, Washington. Alluvial cone at the east base of Mount Wow. The largest blocks in the deposit are about 20 feet in diameter. Circa 1967. Figure 18, U.S. Geological Survey Bulletin 1288. #1:/Mount Rainier National Park/cdrb0121 ID. Crandell, D.R. 121bw Mount Rainier National Park, Washington. The avalanche deposit of rock debris in the foreground originated in rockfalls from Little Tahoma Peak. The deposit buried the former floor of the White River valley to depths as great as 100 feet. The boulder on the ridge at the left has dimensions of about 24 by 30 by 46 feet. Circa 1967. Figure 19, U.S. Geological Survey Bulletin 1288. #1:/Mount Rainier National Park/cdrb0122 ID. Crandell, D.R. 122bw Mount Rainier National Park, Washington. The rock-glacier deposit in the foreground is an accumulation of light-colored rock debris derived from the cliffs of The Palisades in the northeastern section of the park. The deposit covers an area of about 100 acres and is 100 to 300 feet thick. The steeply sloping deposit of rock debris just below the cliffs is a talus. Circa 1967. Figure 10, U.S. Geological Survey Bulletin 1288. #1:/Mount Rainier National Park/cdrb0123 ID. Crandell, D.R. 123bw Mount Rainier National Park, Washington. The end moraine of Garda Drift formed by the Emmons Glacier is a hummocky accumulation of bare rock debris in the center of the White River valley. When the ice front stood at the moraine, the upper surface of the glacier coincided with the conspicuous sloping trimline in the trees on the opposite valley wall. Circa 1967. Figure 15, U.S. Geological Survey Bulletin 1288. #1:/Mount Rainier National Park/cdrb0125 ID. Crandell, D.R. 125bw Mount Rainier National Park, Washington. Down-valley part of avalanche deposits. Photo by A.S. Post, August 20, 1964. Figure 6, U.S. Geological Survey Bulletin 1221-A. #1:/Mount Rainier National Park/cdrb0137 ID. Crandell, D.R. 137bw Mount Rainier National Park, Washington. Part of the north wall of Glacier Basin. The stratigraphic succession from older to younger is the Ohanapecosh Formation, old lahars, old till, old lava flow, red volcanic rubble, and younger lava flow. A dike is younger than the red volcanic rubble, but its age relation to the younger lava flow is not known. The vertical distance from the top of the Garda moraine in the foreground to the top of the ridge is about 240 meters. Circa 1964. Figure 7, U.S. Geological Survey Professional Paper 847. Photos cdrb0137 and cdrb0138 form a panorama. #1:/Mount Rainier National Park/cdrb0138 ID. Crandell, D.R. 138bw Mount Rainier National Park, Washington. Part of the north wall of Glacier Basin. The stratigraphic succession from older to younger is the Ohanapecosh Formation, old lahars, old till, old lava flow, red volcanic rubble, and younger lava flow. A dike is younger than the red volcanic rubble, but its age relation to the younger lava flow is not known. The vertical distance from the top of the Garda moraine in the foreground to the top of the ridge is about 240 meters. Circa 1964. Figure 7, U.S. Geological Survey Professional Paper 847. Photos cdrb0137 and cdrb0138 form a panorama. #1:/Mount Rainier National Park/cdrb0139 ID. Crandell, D.R. 139bw Mount Rainier National Park, Washington. West side of Burroughs Mountain. The vertical distance from the top of Winthrop Glacier (foreground) to the ridge top (center) is about 500 meters. Circa 1964. Figure 8, U.S. Geological Survey Professional Paper 847. #1:/Mount Rainier National Park/cdrb0140 ID. Crandell, D.R. 140bw Mount Rainier National Park, Washington. Till overlain by a lava flow in a gully at Ohanapecosh Park. The outcrop of the till is about 10 meters high. Circa 1964. Figure 9, U.S. Geological Survey Professional Paper 847. #1:/Mount Rainier National Park/cdrb0141 ID. Crandell, D.R. 141bw Mount Rainier National Park, Washington. Bulbous toe of a protalus lobe adjacent to Wonderland Trail near Moraine Park. Circa 1964. Figure 42, U.S. Geological Survey Professional Paper 847. #1:/Mount Rainier National Park/cdrb0142 ID. Crandell, D.R. 142bw Mount Rainier National Park, Washington. Weathered rinds on stones from the upper parts of the Hayden Creek till. Circa 1964. Figure 10-B, U.S. Geological Survey Professional Paper 847. #1:/Mount Rainier National Park/cdrb0144 ID. Crandell, D.R. 144bw Mount Rainier National Park, Washington. Hayden Creek till at the crest of a ridge east of Tyee Peak. The slope at the left descends precipitously to the floor of the Chenuis Creek valley which is nearly 600 meters lower in altitude. Circa 1964. Figure 14, U.S. Geological Survey Professional Paper 847. #1:/Yosemite National Park/ced00001 ID. Cobb, E.D. 1 Yosemite National Park, California. Conditions existing in the hydrologic bench-mark network in the Merced River basin. Figure 2-A, U.S. Geological Survey Circular 460-D. #1:/Mexico City Earthquake 1985/cel00003 ID. Celebi, M. 3ct Mexico City Earthquake, September 19, 1985. Collapsed General Hospital. 1985. #1:/Mexico City Earthquake 1985/cel00004 ID. Celebi, M. 4ct Mexico City Earthquake, September 19, 1985. Undamaged stone masonry of a church near Hospital Suarez. 1985. #1:/Mexico City Earthquake 1985/cel00005 ID. Celebi, M. 5ct Mexico City Earthquake, September 19, 1985. Damaged Social Security Hospital. 1985. #1:/Mexico City Earthquake 1985/cel00006 ID. Celebi, M. 6ct Mexico City Earthquake, September 19, 1985. Collapsed and damaged upper floors of the Ministry of Telecommunications building. 1985. See photo cel0007 for view of the other side of this building. #1:/Mexico City Earthquake 1985/cel00007 ID. Celebi, M. 7ct Mexico City Earthquake, September 19, 1985. Collapsed and damaged upper floors of the Ministry of Telecommunications building. 1985. See photo cel0006 for view of the other side of this building. #1:/Mexico City Earthquake 1985/cel00008 ID. Celebi, M. 8ct Mexico City Earthquake, September 19, 1985. Some damage to the multi-storied mural on the Ministry of Telecommunications and Transportation building. 1985. #1:/Mexico City Earthquake 1985/cel00009 ID. Celebi, M. 9ct Mexico City Earthquake, September 19, 1985. Collapsed upper stories and construction equipment at work at the Ministry of Telecommunications and Transportation building. 1985. #1:/Mexico City Earthquake 1985/cel00010 ID. Celebi, M. 10ct Mexico City Earthquake, September 19, 1985. Collapsed upper stories of the Ministry of Telecommunications and Transportation building. 1985. #1:/Mexico City Earthquake 1985/cel00012 ID. Celebi, M. 12ct Mexico City Earthquake, September 19, 1985. The top floors of this eight-story building collapsed because of pounding against the next building. 1985. #1:/Mexico City Earthquake 1985/cel00013 ID. Celebi, M. 13ct Mexico City Earthquake, September 19, 1985. Collapsed eight-story building. 1985. #1:/Mexico City Earthquake 1985/cel00014 ID. Celebi, M. 14ct Mexico City Earthquake, September 19, 1985. The top floors of the Hotel Continental collapsed. #1:/Mexico City Earthquake 1985/cel00016 ID. Celebi, M. 16ct Mexico City Earthquake, September 19, 1985. Part of the wreckage of a collapsed 21-story tower, one of three steel-constructed towers in the Pina Suarez Apartment Complex. 1985. #1:/Mexico City Earthquake 1985/cel00018 ID. Celebi, M. 18ct Mexico City Earthquake, September 19, 1985. Wreckage of a twenty-one-story steel-constructed building in the Pina Suarez Apartment Complex. 1985. #1:/Mexico City Earthquake 1985/cel00019 ID. Celebi, M. 19ct Mexico City Earthquake, September 19, 1985. Wreckage of a twenty-one-story apartment tower that collapsed at the Pina Suarez Apartment Complex. 1985. #1:/Mexico City Earthquake 1985/cel00020 ID. Celebi, M. 20ct Mexico City Earthquake, September 19, 1985. Apparently minor damage to a building across from the Pina Suarez Apartment Complex. 1985. #1:/Mexico City Earthquake 1985/cel00024 ID. Celebi, M. 24ct Mexico City Earthquake, September 19, 1985. Eight-story frame structure with brick infill walls broken in two. The foundation also came off. #1:/Mexico City Earthquake 1985/cel00027 ID. Celebi, M. 27ct Mexico City Earthquake, September 19, 1985. Eight-story building that collapsed due to insufficient detailing of connections and pounding against the next building. 1985. #1:/Mexico City Earthquake 1985/cel00031 ID. Celebi, M. 31ct Mexico City Earthquake, September 19, 1985. Building damaged by pounding against the next building. 1985. #1:/Mexico City Earthquake 1985/cel00032 ID. Celebi, M. 32 Mexico City Earthquake, September 19, 1985. Nuevo Leon fifteen-story reinforced concrete structure. Part of the building was only slightly damaged, while another part of it collapsed. 1985. Photos cel00032 through cel00034 provide a sequence of views. #1:/Mexico City Earthquake 1985/cel00033 ID. Celebi, M. 33 Mexico City Earthquake, September 19, 1985. Nuevo Leon fifteen-story reinforced concrete structure. Part of the building was only slightly damaged, while another part of it collapsed. 1985. Photos cel00032 through cel00034 provide a sequence of views. #1:/Mexico City Earthquake 1985/cel00034 ID. Celebi, M. 34 Mexico City Earthquake, September 19, 1985. Nuevo Leon fifteen-story reinforced concrete structure. Part of the building was only slightly damaged, while another part of it collapsed. 1985. Photos cel00032 through cel00034 provide a sequence of views. #1:/Mexico City Earthquake 1985/cel00037 ID. Celebi, M. 37ct Mexico City Earthquake, September 19, 1985. Destruction of the Urbana Suarez Apartment Complex. 1985. Photos cel00037 through cel00040 provide different views; photo cel00040 shows the completely collapsed building. #1:/Mexico City Earthquake 1985/cel00038 ID. Celebi, M. 38ct Mexico City Earthquake, September 19, 1985. Destruction of the Urbana Suarez Apartment Complex. 1985. Photos cel00037 through cel00040 provide different views; photo cel00040 shows the completely collapsed building. #1:/Mexico City Earthquake 1985/cel00039 ID. Celebi, M. 39ct Mexico City Earthquake, September 19, 1985. Destruction of the Urbana Suarez Apartment Complex. 1985. Photos cel00037 through cel00040 provide different views; photo cel00040 shows the completely collapsed building. #1:/Mexico City Earthquake 1985/cel00040 ID. Celebi, M. 40ct Mexico City Earthquake, September 19, 1985. Urbana Suarez Apartment Complex completely collapsed. 1985. Photos cel00037 through cel00040 provide different views. #1:/Mexico City Earthquake 1985/cel00041 ID. Celebi, M. 41ct Mexico City Earthquake, September 19, 1985. X-shaped fracture-damaged columns on a structure that is also permanently swayed. 1985. #1:/Mexico City Earthquake 1985/cel00042 ID. Celebi, M. 42ct Mexico City Earthquake, September 19, 1985. Damaged upper floors of the Lacsa building. 1985. #1:/Mexico City Earthquake 1985/cel00053 ID. Celebi, M. 53ct Mexico City Earthquake, September 19, 1985. Building with damaged columns and improper connections. 1985. #1:/Cressman E.R. Collection/cer00080 ID. Cressman, E.R. 80 Retort Phosphatic Shale Member of the Phosphoria Formation exposed in bulldozer trench at Greenstone Gulch locality 1250. Note depth of creep zone. Beaverhead County, Montana.n.d. Figure 88 in U.S. Geological Survey. Professional paper 313-C. 1964. #1:/Montana-Professional paper 78/cfc00020 ID. Calkins, F.C. 20 Granite-Bimetallic mine, showing weathering of granite, at Granite. Granite County, Montana. Circa 1907. Plate 7-B in U.S. Geological Survey. Professional paper 78. 1913. #1:/Montana-Professional paper 78/cfc00027 ID. Calkins, F.C. 27 Folded and faulted limestones on east side of Foster Creek canyon; the shallow gulch at the left is eroded along a normal fault which brings, Carboniferous limestone against contorted banded Devonian limestones. Granite at base of cliff: dike of scapolite aplite at top of cliff, just right of deep gulch. Deer Lodge County, Montana. Circa 1907. Plate 16-A in U.S. Geological Survey. Professional paper 78. 1913. Plate 8 in U.S. Geological Survey. Folio 196. 1915. #1:/Montana-Professional paper 78/cfc00033 ID. Calkins, F.C. 33 Cherty Madison limestone north of Stewart Gulch. Granite County, Montana. Circa 1907. Plate in U.S. Geological Survey. Professional paper 78. 1913. Plate 6 in U.S. Geological Survey. Folio 196. 1915. #1:/Montana-Professional paper 78/cfc00057 ID. Calkins, F.C. 57 Tilted early Tertiary gravels resting on Pre-Cambrian sediments at Red Cliff on the south side of Rock Creek. Unconformable contact runs diagonally downward from point near brink of cliff at left. Granite County, Montana. Circa 1907. Plate 16-B in U.S. Geological Survey. Professional paper 78. 1913. Plate 7 in U.S. Geological Survey. Folio 196. 1915. #1:/Montana-Professional paper 78/cfc00061 ID. Calkins, F.C. 61 Extreme western part of Anaconda Range, shows glacial cirques opening into broad glaciated valley and bold sculpture in metamorphosed calcareous rocks of Newland formation forming Mount Warren (at the right), looking south. Granite County, Montana. Circa 1907. Plate 4-A in U.S. Geological Survey. Professional paper 78. 1913. #1:/Montana-Professional paper 78/cfc00066 ID. Calkins, F.C. 66 Unconformable contact of Cambrian Flathead quartzite on Algonkian Spokane formation, mans hand marks Cambrian, near back of his jacket marks Spokane formation. Granite County, Montana. Circa 1907. Plate 7-A (with graphics in lieu of remarks above) in U.S. Geological Survey. Professional paper 78. 1913. Plate 4 in U.S. Geological Survey. Folio 196. 1915. #1:/Montana-Professional paper 78/cfc00067 ID. Calkins, F.C. 67 Irruptive contact of granodiorite with Newland formation at the head of the east fork of Rock Creek; the contact, which is parallel to the bedding, runs from the top of the peak toward the lower left corner of the view, looking south. Granite County, Montana. Circa 1907. Plate 13-A in U.S. Geological Survey. Professional paper 78. 1913. #1:/Montana-Professional paper 78/cfc00069 ID. Calkins, F.C. 69 Siliceous limestone of Red Lion formation, near Gold Coin. Deer Lodge Granite County, Montana. Circa 1907. Plate 10-A in U.S. Geological Survey. Professional paper 78. 1913. #1:/Montana-Professional paper 78/cfc00076 ID. Calkins, F.C. 76 Detail of contact between granodiorite and Algonkian rocks at Storm Lake, shows stoping, apophyses and variation in igneous rocks. Deer Lodge County, Montana. Circa 1907. Plate 13-B in U.S. Geological Survey. Professional paper 78. 1913. Plate 3 in U.S. Geological Survey. Folio 196. 1915. #1:/Montana-Professional paper 78/cfc00080 ID. Calkins, F.C. 80 Upper valley of Tenmile Creek, shows characteristic weathering of sheared granodiorite (in center) dark tone of Prichard rocks (on crest at left) and junction of remarkably broad, flat bottom with precipitous wall of glaciated valley, looking northeast. Granite County, Montana. Circa 1907. Plate 4-B in U.S. Geological Survey. Professional paper 78. 1913. Plate 1 in U.S. Geological Survey. Folio 196. 1915. #1:/Montana-Professional paper 78/cfc00128 ID. Calkins, F.C. 128 Red shale with gray nodules in lower part of the Quadrant formation, Granite County, Montana. Circa 1907. Plate 11-B in U.S. Geological Survey. Professional paper 78. 1913. #1:/Montana-Professional paper 78/cfc00130 ID. Calkins, F.C. 130 Rock specimen showing inclusions of calcareous hornfels, with dark reaction rims of hornblende in diorite at head of Fourmile basin. Granite County, Montana. Circa 1907. Plate 6-A in U.S. Geological Survey. Professional paper 78. 1913. #1:/Montana-Professional paper 78/cfc00135 ID. Calkins, F.C. 135 Specimen of garnet rock formed by intense metamorphism of the lower part of the Red Lion formation; shows garnet crystals, calcite and magnetite (black granular mass near center), intimately associated with fine granular aggregate of metamorphic minerals chiefly garnet, pyroxene, amphibole and epidote. Montana. Circa 1907. Plate 9-A in U.S. Geological Survey. Professional paper 78. 1913. #1:/Montana-Professional paper 78/cfc00138 ID. Calkins, F.C. 138 Magnetite in limestone, from inclusion in granodiorite, near Cable. Deer Lodge, Montana. Circa 1907. Plate 9-B in U.S. Geological Survey. Professional paper 78. 1913. Plate 10 in U.S. Geological Survey. Folio 196. 1915. #1:/Montana-Professional paper 78/cfc00140 ID. Calkins, F.C. 140 Thin section of scapolite aplite from dike on Foster Creek; the scapolite forms a single individual inclosing and interpenetrating with plagioclase, microcline, and pyroxene. Calcite and zeolite form an irregular mass, probably a cavity filing. Crossed nicols. Montana. Circa 1907. Plate 14-A, with added graphics and enlarged 60 diameters, in U.S. Geological Survey. Professional paper 78. 1913. #1:/Montana-Professional paper 78/cfc00143 ID. Calkins, F.C. 143 Thin section of pyroxene aplite showing soda feldspar resembling microcline, crossed nicols. Montana. Circa 1907. Plate 14-B, enlarged 60 diameters, in U.S. Geological Survey. Professional paper 78. 1913. #1:/Montana-Professional paper 78/cfc00145 ID. Calkins, F.C. 145 Thin section of metamorphosed diabase from sill in Algonkian rocks north of Lost Creek; shows micropegmatitic intergrowth of oligoclase and quartz oriented on large crystal of labradorite. Black is chiefly hornblende intergrown with quartz; slender needles of apatite conspicuous near top. Granite County, Montana. Circa 1907. Plate 12-A, published enlarged 60 diameters, in U.S. Geological Survey. Professional paper 78. 1913. #1:/Montana-Professional paper 78/cfc00146 ID. Calkins, F.C. 146 Thin section of cordierite hornfels rich in orthoclase, from lower part of Silver Hill formation, near contact with Cable batholith; shows large poikilitic crystal of cordierite and small crystals of andalusite, sillimanite, tourmaline magnetite zircon and biotite (dark, partly transparent), in a matrix composed essentially of polyhedral grains of orthoclase, ordinary light. Montana. Circa 1907. Plate 15-A, with added graphics, and enlarged 55 diameters, in U.S. Geological Survey. Professional paper 78. 1913. #1:/Montana-Professional paper 78/cfc00149 ID. Calkins, F.C. 149 Thin section across margin of magnetite bodies shown in Calkins photo 138; shows magnetite (black) with veins of calcite and serpentine, separated from the main mass of limestone by aggregates of round grains of iron poor olivine, altered to serpentine on margins and cracks, ordinary light. Montana. Circa 1907. Plate 15-B, enlarged 55 diameters, in U.S. Geological Survey. Professional paper 78. 1913. #1:/Montana-Professional paper 78/cfc00151 ID. Calkins, F.C. 151 Photomicrograph of cordierite gneiss, the chief constituents is quartz in irregular grains with few inclusions, mica and cordierite (oblong crystal in center, with numerous inclusions). Montana. Circa 1907. Plate 5-A in U.S. Geological Survey. Professional paper 78. 1913. #1:/Montana-Professional paper 78/cfc00152 ID. Calkins, F.C. 152 Photomicrograph of metamorphosed mud-sand rock containing scapolite, shows texture of argillaceous sandstone inclosing a mud fragment penetrated by a sun crack. Scapolite with abundant inclusions forms the light spots in the dark mudstone. Montana. Circa 1907. Plate 5-B in U.S. Geological Survey. Professional paper 78. 1913. #1:/Montana-Professional paper 78/cfc00157 ID. Calkins, F.C. 157 Sandstone specimen, with mud flakes (Spokane formation), frequently observed in the Belt series in sandstones of formations whose shales are sun cracked. Granite County, Montana. Circa 1907. Plate 6-B in U.S. Geological Survey. Professional paper 78. 1913. Plate 12 in U.S. Geological Survey. Folio 196. 1915. #1:/Montana-Professional paper 78/cfc00158 ID. Calkins, F.C. 158 Characteristic features of the lower limestone of the Hasmark formation, as shown by specimens; mottling due to projection of larger crystal (of dolomite?), photo 159 showing also white twig like possibly organic bodies. Montana. Circa 1907. Plates 8-C and 8- B, respectively in U.S. Geological Survey. Professional paper 78. 1913. #1:/Montana-Professional paper 78/cfc00159 ID. Calkins, F.C. 159 Characteristic features of the lower limestone of the Hasmark formation, as shown by specimens; mottling due to projection of larger crystal (of dolomite?), photo 159 showing also white twig like possibly organic bodies. Montana. Circa 1907. Plates 8-C and 8- B, respectively in U.S. Geological Survey. Professional paper 78. 1913. #1:/Montana-Professional paper 78/cfc00160 ID. Calkins, F.C. 160 Characteristic features of the lower limestone of the Hasmark formation, as shown by specimens; oolitic structure. Montana. Circa 1907. Plates 8-A and 8-D, respectively, in U.S. Geological Survey. Professional paper 78. 1913. Photo 163 also plate 4 in U.S. Geological Survey. Folio 196. 1915. #1:/Montana-Professional paper 78/cfc00162 ID. Calkins, F.C. 162 Specimen of lower limestone of the Kootenai formation, showing twig like bodies that are probably organic. Granite County, Montana. Circa 1907. Plate 11-A in U.S. Geological Survey. Professional paper 78. 1913. #1:/Montana-Professional paper 78/cfc00163 ID. Calkins, F.C. 163 Characteristic features of the lower limestone of the Hasmark formation, as shown by specimens; oolitic structure. Montana. Circa 1907. Plates 8-A and 8-D, respectively, in U.S. Geological Survey. Professional paper 78. 1913. Photo 163 also plate 4 in U.S. Geological Survey. Folio 196. 1915. #1:/Yosemite National Park/cfc00305 ID. Calkins, F.C. 305 Yosemite National Park, California. Porphyritic Half Dome Granite south of Tenaya Lake. 1913. #1:/Yosemite National Park/cfc00306 ID. Calkins, F.C. 306 Yosemite National Park, California. Porphyritic Cathedral Granite southeast of Tenaya Lake. 1913. #1:/Yosemite National Park/cfc00308 ID. Calkins, F.C. 308 Yosemite National Park, California. Dike of Cathedral Granite in porphyritic Half Dome Granite near Sunrise Mountain. 1913. #1:/Yosemite National Park/cfc00310 ID. Calkins, F.C. 310 Yosemite National Park, California. Cathedral Peak Granite polished by ancient glaciers, west of Tuolumne Meadows. On this ice-smoothed surface of Cathedral Peak Granite, the phenocrysts of feldspar appear in cross section and resemble pieces of sugar. The largest are about 2 inches in length. 1913. Plate 52-B, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/cfc00311 ID. Calkins, F.C. 311 Yosemite National Park, California. Cathedral Peak Granite at the base of Vogelsang Peak. 1913. #1:/Yosemite National Park/cfc00312 ID. Calkins, F.C. 312 Yosemite National Park, California. Dike in Cathedral Granite on the Tuolumne River near Tuolumne Falls. 1913. #1:/Yosemite National Park/cfc00314 ID. Calkins, F.C. 314 Yosemite National Park, California. Dike of granodiorite in granite on the east slope of Illilouette Ridge. 1913. #1:/Yosemite National Park/cfc00315 ID. Calkins, F.C. 315 Yosemite National Park, California. Granodiorite with flow structure on Illilouette Ridge. 1913. #1:/Yosemite National Park/cfc00321 ID. Calkins, F.C. 321 Yosemite National Park, California. "North America" map on cliff east of El Capitan. The darker rocks are intrusive in the granite forming most of the cliff. 1913. #1:/Yosemite National Park/cfc00322 ID. Calkins, F.C. 322 Yosemite National Park, California. South across Fletcher Lake, showing light- colored dikes in old volcanic(?) rocks. 1913. #1:/Yosemite National Park/cfc00323 ID. Calkins, F.C. 323 Yosemite National Park, California. West across Fletcher Lake. Parsons Peak in the center. 1913. #1:/Yosemite National Park/cfc00325 ID. Calkins, F.C. 325 Yosemite National Park, California. Columnar structure in a basalt flow on the Tuolumne River. 1913. #1:/Yosemite National Park/cfc00326 ID. Calkins, F.C. 326 Yosemite National Park, California. Columnar structure, showing glacial striae. Detail of the bottom center of photo cfc00325. 1913. #1:/Yosemite National Park/cfc00328 ID. Calkins, F.C. 328 Yosemite National Park, California. West portal of the Yosemite Falls recess, showing fractures. 1913. #1:/Yosemite National Park/cfc00329 ID. Calkins, F.C. 329 Yosemite National Park, California. Bottom of Yosemite Falls, showing parallel curved fractures. 1913. #1:/Yosemite National Park/cfc00331 ID. Calkins, F.C. 331 Yosemite National Park, California. Natural bridge northeast of Indian Rock, formed by splitting of a slab due to exfoliation or jointing. 1913. #1:/Yosemite National Park/cfc00332 ID. Calkins, F.C. 332 Yosemite National Park, California. Jointed El Capitan Granite northeast of Sentinel Dome. 1913. #1:/Yosemite National Park/cfc00333 ID. Calkins, F.C. 333 Yosemite National Park, California. Jointed granite on the west side of the amphitheater north of Mount Clark. Fractures possibly due to exfoliation. 1913. #1:/Yosemite National Park/cfc00335 ID. Calkins, F.C. 335 Yosemite National Park, California. Three Brothers. This group is remarkable for its strongly asymmetric forms which are due to the splitting of the rock along oblique master joints. 1913. Plate 19-B, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/cfc00336 ID. Calkins, F.C. 336 Yosemite National Park, California. Fractures in granite at the base of El Capitan, viewed from the southwest. 1913. #1:/Yosemite National Park/cfc00337 ID. Calkins, F.C. 337 Yosemite National Park, California. Liberty Cap, viewed from the southwest, showing a master joint. 1913. #1:/Yosemite National Park/cfc00338 ID. Calkins, F.C. 338 Yosemite National Park, California. Base of Liberty Cap, viewed from near Nevada Fall, showing joints and conchoidal fractures. 1913. #1:/Yosemite National Park/cfc00339 ID. Calkins, F.C. 339 Yosemite National Park, California. Mountains west of Fairview Dome, viewed from Tioga Road, showing joints in low dip. 1913. #1:/Yosemite National Park/cfc00340 ID. Calkins, F.C. 340 Yosemite National Park, California. Joints in granodiorite on the Tuolumne River above Glen Aulin. Dip is upstream. 1913. #1:/Yosemite National Park/cfc00341 ID. Calkins, F.C. 341 Yosemite National Park, California. Fissure in a cirque between Red Peak and Gray Peak. Possibly the locus of Quaternary faulting. 1913. #1:/Yosemite National Park/cfc00342 ID. Calkins, F.C. 342 Yosemite National Park, California. Fissure between Red Peak and Gray Peak. 1913. #1:/Yosemite National Park/cfc00347 ID. Calkins, F.C. 347 Yosemite National Park, California. North-south fissures east of Echo Peaks. 1913. #1:/Yosemite National Park/cfc00350 ID. Calkins, F.C. 350 Yosemite National Park, California. Dome southeast of Mount Starr King. 1913. #1:/Yosemite National Park/cfc00351 ID. Calkins, F.C. 351 Yosemite National Park, California. Summit of Mount Starr King, viewed from the southeast, showing accumulation of (exfoliated?) shells. 1913. #1:/Yosemite National Park/cfc00352 ID. Calkins, F.C. 352 Yosemite National Park, California. Curved (exfoliated?) shells on the west slope of Sentinel Dome. 1913. #1:/Yosemite National Park/cfc00354 ID. Calkins, F.C. 354 Yosemite National Park, California. From Sugar Loaf (Bunnell Point)toward Mount Clark, showing exfoliation in the foreground. 1913. #1:/Yosemite National Park/cfc00356 ID. Calkins, F.C. 356 Yosemite National Park, California. Up the Little Yosemite Valley from Sugar Loaf (Bunnell Point). 1913. #1:/Yosemite National Park/cfc00359 ID. Calkins, F.C. 359 Yosemite National Park, California. Head of the gorge below Upper Yosemite Fall, showing exfoliation. 1913. #1:/Yosemite National Park/cfc00360 ID. Calkins, F.C. 360 Yosemite National Park, California. Stack of deeply weathered granite on Illilouette Ridge. 1913. #1:/Yosemite National Park/cfc00361 ID. Calkins, F.C. 361 Yosemite National Park, California. Weathering of a jointed block of granodiorite near Sentinel Creek. 1913. #1:/Yosemite National Park/cfc00362 ID. Calkins, F.C. 362 Yosemite National Park, California. Weathering of an aplite dike in granodiorite west of Sentinel Dome. 1913. #1:/Yosemite National Park/cfc00363 ID. Calkins, F.C. 363 Yosemite National Park, California. Weathered pit at Glacier Point. Cavities of this type are commonly mistaken for potholes such as those worn in streambeds by swiftly rotating cobbles. Those at Glacier Point have been pointed to as evidence of the passage of a glacier over the promontory. The earlier ice did pass over Glacier Point, but these cavities were produced long afterward by strongly localized weathering of the rock promoted by pools of water. Such weather pits occur in the Sierra Nevada in many places where no glaciers have ever penetrated. 1913. Plate 33-A, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/cfc00365 ID. Calkins, F.C. 365 Yosemite National Park, California. Aplite on Illilouette Ridge, showing weather holes in an advanced stage of growth. This area has not been glaciated. 1913. #1:/Yosemite National Park/cfc00366 ID. Calkins, F.C. 366 Yosemite National Park, California. Juniper near Yosemite Creek. Granite shows mechanical weathering. 1913. #1:/Yosemite National Park/cfc00368 ID. Calkins, F.C. 368 Yosemite National Park, California. Cathedral Peak, viewed from Sunrise trail. 1913. #1:/Yosemite National Park/cfc00369 ID. Calkins, F.C. 369 Yosemite National Park, California. Cathedral Peak near Cathedral Pass, showing vertical joints and summit pinnacles. 1913. #1:/Yosemite National Park/cfc00370 ID. Calkins, F.C. 370 Yosemite National Park, California. Fairview Dome, viewed from the southeast. 1913. #1:/Yosemite National Park/cfc00372 ID. Calkins, F.C. 372 Yosemite National Park, California. Sheeting in porphyritic granite on the ridge east of Vogelsang Lake. 1913. #1:/Yosemite National Park/cfc00373 ID. Calkins, F.C. 373 Yosemite National Park, California. Sentinel Rock, viewed from Glacier Point Trail. 1913. #1:/Yosemite National Park/cfc00374 ID. Calkins, F.C. 374 Yosemite National Park, California. Agassiz Column. The prismatic form of the column is determined wholly by intersecting joint planes, vertical and oblique. The column is the last remnant of a rock mass that was divided by many such fractures. 1913. #1:/Yosemite National Park/cfc00375 ID. Calkins, F.C. 375 Yosemite National Park, California. Sentinel Dome, viewed from the southwest. 1913. #1:/Yosemite National Park/cfc00377 ID. Calkins, F.C. 377 Yosemite National Park, California. Crags of aplite south of Indian Rock. 1913. #1:/Yosemite National Park/cfc00379 ID. Calkins, F.C. 379 Yosemite National Park, California. Toward Mount Hoffman from Illilouette Ridge. 1913. #1:/Yosemite National Park/cfc00380 ID. Calkins, F.C. 380 Yosemite National Park, California. Upper basin of Illilouette Creek. Mount Clark at the extreme left. Old side valley in the left center. 1913. #1:/Yosemite National Park/cfc00381 ID. Calkins, F.C. 381 Yosemite National Park, California. Cathedral Peak and Fairview Dome, viewed from lower Tuolumne meadows. 1913. #1:/Yosemite National Park/cfc00382 ID. Calkins, F.C. 382 Yosemite National Park, California. South from the lower end of Tuolumne meadows. Left to right: Unicorn Peak, Echo Peak, and Cathedral Peak. 1913. #1:/Yosemite National Park/cfc00383 ID. Calkins, F.C. 383 Yosemite National Park, California. Mono Pass, viewed from Mammoth Peak. 1913. #1:/Yosemite National Park/cfc00384 ID. Calkins, F.C. 384 Yosemite National Park, California. Mount Dana, viewed from the northwest spur of Kuna Crest. 1913. #1:/Yosemite National Park/cfc00390 ID. Calkins, F.C. 390 Yosemite National Park, California. Mount Florence (center), viewed from Vogelsang Peak. 1913. Photos cfc00390 and cfc00391 form a panorama. #1:/Yosemite National Park/cfc00391 ID. Calkins, F.C. 391 Yosemite National Park, California. Toward Mount Maclure (Simmons Peak?) from Vogelsang Peak. 1913. Photos cfc00390 and cfc00391 form a panorama. #1:/Yosemite National Park/cfc00398 ID. Calkins, F.C. 398 Yosemite National Park, California. Half Dome, viewed from the mouth of Snow Creek, a hanging valley. 1913. #1:/Yosemite National Park/cfc00401 ID. Calkins, F.C. 401 Yosemite National Park, California. Bridalveil Fall, viewed from Big Oak Flat Road, showing a cross section of a hanging valley. Leaning Tower at the right with master joint parallel to the left side of the valley. 1913. #1:/Yosemite National Park/cfc00403 ID. Calkins, F.C. 403 Yosemite National Park, California. Yosemite Falls, viewed from Glacier Point Trail. 1913. #1:/Yosemite National Park/cfc00409 ID. Calkins, F.C. 409 Yosemite National Park, California. Tenaya Lake, viewed from its foot. 1913. #1:/Yosemite National Park/cfc00410 ID. Calkins, F.C. 410 Yosemite National Park, California. Glaciated rock 1 mile northeast of Tenaya Lake. 1913. #1:/Yosemite National Park/cfc00412 ID. Calkins, F.C. 412 Yosemite National Park, California. Washburn Lake, viewed from its foot. 1913. #1:/Yosemite National Park/cfc00413 ID. Calkins, F.C. 413 Yosemite National Park, California. Brow of granite terrace in Little Yosemite Valley. 1913. #1:/Yosemite National Park/cfc00414 ID. Calkins, F.C. 414 Yosemite National Park, California. Glaciated rock and boulder trains near the Tuolumne River below the meadows. 1913. #1:/Yosemite National Park/cfc00415 ID. Calkins, F.C. 415 Yosemite National Park, California. Glaciated rock east of the Tuolumne River north of the meadows. 1913. #1:/Yosemite National Park/cfc00416 ID. Calkins, F.C. 416 Yosemite National Park, California. Glaciated mountains north of Glen Aulin. Striae rising toward the left or downstream. 1913. #1:/Yosemite National Park/cfc00418 ID. Calkins, F.C. 418 Yosemite National Park, California. Glaciated rock west of the Tuolumne River, showing joints on stoss and lee sides, absence of shells. 1913. #1:/Yosemite National Park/cfc00419 ID. Calkins, F.C. 419 Yosemite National Park, California. Peak (Matthes Crest?) south of Echo Peak(s), showing north side and east-west joints and upper limit of glaciation. 1913. #1:/Yosemite National Park/cfc00420 ID. Calkins, F.C. 420 Yosemite National Park, California. Mount Clark, viewed from the west wall of the north cirque. Old cirque in the sunlight at the right. 1913. #1:/Yosemite National Park/cfc00421 ID. Calkins, F.C. 421 Yosemite National Park, California. Glaciated slopes northwest of Emeric Creek. 1913. #1:/Yosemite National Park/cfc00422 ID. Calkins, F.C. 422 Yosemite National Park, California. Mountain (Vogelsang Peak?) southwest of Rafferty Peak. 1913. #1:/Yosemite National Park/cfc00423 ID. Calkins, F.C. 423 Yosemite National Park, California. Recent moraine with alluvium 2 miles northwest of Mount Clark. 1913. #1:/Yosemite National Park/cfc00424 ID. Calkins, F.C. 424 Yosemite National Park, California. Moraine northwest of Little Yosemite Valley, viewed from Sugar Loaf (Bunnell Point). 1913. #1:/Yosemite National Park/cfc00425 ID. Calkins, F.C. 425 Yosemite National Park, California. Perched boulder on Moraine Dome. 1913. #1:/Yosemite National Park/cfc00426 ID. Calkins, F.C. 426 Yosemite National Park, California. Erratic boulder of Cathedral Granite on Sugar Loaf (Bunnell Point). 1913. #1:/Yosemite National Park/cfc00427 ID. Calkins, F.C. 427 Yosemite National Park, California. Typical "perched" boulder of an earlier glaciation. The boulder is on the Divide south of Starr King Meadows, about 3 miles from its probable place of origin in the Clark Range. It measures about 5 feet to the side and is perched on a pedestal 20 inches high. The pedestal is composed of local rock and has remained preserved as a result of the protection from the weather afforded by the boulder. 1913. Plate 33-B, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/cfc00429 ID. Calkins, F.C. 429 Yosemite National Park, California. Erratic boulder at the base of Sentinel Dome. A row of such boulders marks the highest level reached by ice in the vicinity of Glacier Point. They are the sole remnants of a very ancient moraine, the rest of which has long since disappeared, and they are believed to record a stage of glaciation that antedated the El Portal stage. The boulder shown here was angular when deposited by the ice and has become round by long- continued exfoliation. 1913. Plate 38-B, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/cfc00431 ID. Calkins, F.C. 431 Yosemite National Park, California. Potholes and water polish, perhaps of late glacial age, on the Tuolumne River below the meadows. 1913. #1:/Yosemite National Park/cfc00432 ID. Calkins, F.C. 432 Yosemite National Park, California. Water fluting on the Tuolumne River above White Cascade. 1913. #1:/Yosemite National Park/cfc00435 ID. Calkins, F.C. 435 Yosemite National Park, California. Water fluting near the head of Glen Aulin at the river. 1913. #1:/Yosemite National Park/cfc00442 ID. Calkins, F.C. 442 Yosemite National Park, California. Cliffs east of Yosemite Fall, viewed from the Sentinel Hotel. Castle Cliffs on the right. 1913. #1:/Yosemite National Park/cfc00450 ID. Calkins, F.C. 450 Yosemite National Park, California. Half Dome in profile, viewed from the trail between Glacier Point and Illilouette Creek. 1913. #1:/Yosemite National Park/cfc00453 ID. Calkins, F.C. 453 Yosemite National Park, California. Perched erratic. Granodiorite on granite on a knob southeast of Eagle Peak meadows. 1913. #1:/Yosemite National Park/cfc00454 ID. Calkins, F.C. 454 Yosemite National Park, California. Perched erratic, seen in photo cfc00453, from an oblique angle. Granodiorite on granite on a knob southeast of Eagle Peak Meadows. 1913. #1:/Yosemite National Park/cfc00455 ID. Calkins, F.C. 455 Yosemite National Park, California. Glacial boulder perched on a 5-foot pedestal on a hill east of Eagle Peak Meadows. This perched boulder has the highest pedestal in the Yosemite region. It is situated on the mountain west of Upper Yosemite Fall. The pedestal is composed of slabs of local rock remnants of concentric shells that formerly enveloped a large part of the summit. 1913. Plate 38-A, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/cfc00461 ID. Calkins, F.C. 461 Yosemite National Park, California. El Capitan, viewed from the southeast. 1913. #1:/Yosemite National Park/cfc00478 ID. Calkins, F.C. 478 Yosemite National Park, California. Sill of Half Dome Granite, distinguished by banding, west of Sentinel Falls. 1913. #1:/Yosemite National Park/cfc00479 ID. Calkins, F.C. 479 Yosemite National Park, California. North face of Middle Cathedral Rock, showing dikes of Bridalveil Granite. 1913 #1:/Yosemite National Park/cfc00483 ID. Calkins, F.C. 483 Yosemite National Park, California. Spheroidal weathering in diorite on a ridge south of Cathedral Spires. 1913. #1:/Yosemite National Park/cfc00485 ID. Calkins, F.C. 485 Yosemite National Park, California. Weather pits in granodiorite on a slope northeast of Columbia Rock. 1913. #1:/Yosemite National Park/cfc00490 ID. Calkins, F.C. 490 Yosemite National Park, California. Cliffs under Glacier Point. 1913. #1:/Yosemite National Park/cfc00491 ID. Calkins, F.C. 491 Yosemite National Park, California. Cathedral Spires, viewed from the east end of El Capitan Meadows, showing strong joints of east-northeast strike. 1913. #1:/Yosemite National Park/cfc00492 ID. Calkins, F.C. 492 Yosemite National Park, California. Cathedral Spires, viewed from the rim on the south side. 1913. #1:/Yosemite National Park/cfc00493 ID. Calkins, F.C. 493 Yosemite National Park, California. South Cathedral Spires, viewed from the southwest. 1913. #1:/Yosemite National Park/cfc00494 ID. Calkins, F.C. 494 Yosemite National Park, California. Bulge on the northeast side of Bridalveil Valley due to differential erosion of granite and diorite. 1913. #1:/Yosemite National Park/cfc00495 ID. Calkins, F.C. 495 Yosemite National Park, California. El Capitan and rock slides, viewed from Wawona Road, showing the contrast between the great mass of talus at the base of the diorite cliffs and the absence of talus at the base of El Capitan, a granite promontory. 1913. #1:/Yosemite National Park/cfc00496 ID. Calkins, F.C. 496 Yosemite National Park, California. El Capitan, viewed from the west, showing the contrast of the monolithic mass with the jointed granite of the spur west of it. 1913. #1:/Yosemite National Park/cfc00497 ID. Calkins, F.C. 497 Yosemite National Park, California. Across Yosemite Valley from Ribbon Fall. The depth of the chasm and the abruptness with which it trenches the gently undulating upland are strikingly brought out. Taft Point is the first prominence to the left of center. At the lower right is the base of the Cathedral Rocks. 1913. Plate 8-B, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/cfc00498 ID. Calkins, F.C. 498 Yosemite National Park, California. Recess west of Taft Point, viewed from the north side of Merced River. Taft Point is near the left side. Pyramid(?) is near the right side. 1913. #1:/Yosemite National Park/cfc00499 ID. Calkins, F.C. 499 Yosemite National Park, California. Cliffs just west of Glacier Point. Cleft from upper left corner diagonally downward is eroded along a strong master joint against which another on the left seems to end. 1913. #1:/Yosemite National Park/cfc00500 ID. Calkins, F.C. 500 Yosemite National Park, California. Glacier Point, viewed from Eagle Peak. The salient ascended by the trail is chiefly granite. 1913. #1:/Yosemite National Park/cfc00501 ID. Calkins, F.C. 501 Yosemite National Park, California. Sentinel Rock. 1913. #1:/Yosemite National Park/cfc00504 ID. Calkins, F.C. 504 Yosemite National Park, California. Elephant Rock on Oak Flat Road, beyond the border of the valley map area, shows jointing and decomposition. 1913. #1:/Yosemite National Park/cfc00506 ID. Calkins, F.C. 506 Yosemite National Park, California. Closely jointed granite on rim southwest of Taft Point. 1913. #1:/Yosemite National Park/cfc00510 ID. Calkins, F.C. 510 Yosemite National Park, California. Three Brothers, viewed from the valley rim due south. 1913. #1:/Yosemite National Park/cfc00511 ID. Calkins, F.C. 511 Yosemite National Park, California. Three Brothers and Yosemite Falls, viewed from Taft Point. 1913. Photos cfc00511 and cfc00512 form a panorama. #1:/Yosemite National Park/cfc00512 ID. Calkins, F.C. 512 Yosemite National Park, California. Yosemite Falls and Mount Hoffmann, viewed from Taft Point. 1913. Photos cfc00511 and cfc 00512 form a panorama. #1:/Yosemite National Park/cfc00514 ID. Calkins, F.C. 514 Yosemite National Park, California. Leaning Tower, viewed from the slope north of Cathedral Rock. 1913. #1:/Yosemite National Park/cfc00517 ID. Calkins, F.C. 517 Yosemite National Park, California. Conchoidal fracture in Half Dome Granite at the west end of Half Dome pedestal. 1913. #1:/Yosemite National Park/cfc00519 ID. Calkins, F.C. 519 Yosemite National Park, California. Liberty Cap, viewed from the trail above Vernal Fall, showing master joint. 1913. #1:/Yosemite National Park/cfc00521 ID. Calkins, F.C. 521 Yosemite National Park, California. El Capitan, viewed from Oak Flat Road. 1913. #1:/Yosemite National Park/cfc00523 ID. Calkins, F.C. 523 Yosemite National Park, California. Lost Arrow, Castle Cliffs, viewed from the hospital. 1913. #1:/Yosemite National Park/cfc00525 ID. Calkins, F.C. 525 Yosemite National Park, California. Lower part of Royal Arches. 1913. #1:/Yosemite National Park/cfc00526 ID. Calkins, F.C. 526 Yosemite National Park, California. North Dome and Royal Arches, viewed from the head of the water power pipe. 1913. #1:/Yosemite National Park/cfc00527 ID. Calkins, F.C. 527 Yosemite National Park, California. North Dome, viewed from the Merced River near Happy Isles. This dome was repeatedly overridden by glaciers, yet it does not differ materially in general form from Sentinel Dome, which was not overridden. 1913. #1:/Yosemite National Park/cfc00529 ID. Calkins, F.C. 529 Yosemite National Park, California. North Dome and Basket Dome, viewed from the intake of the water pipe for the power plant. 1913. #1:/Yosemite National Park/cfc00531 ID. Calkins, F.C. 531 Yosemite National Park, California. Half Dome, viewed from the vicinity of Quarter Domes. 1913. #1:/Yosemite National Park/cfc00532 ID. Calkins, F.C. 532 Yosemite National Park, California. Sentinel Dome is a typical dome of massive granite that owes its rounded form wholly to exfoliation, the casting off of successive shells. It has not been overridden by glaciers of the ice age. 1913. Plate 21-A, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/cfc00533 ID. Calkins, F.C. 533 Yosemite National Park, California. Cleft between North and Middle Cathedral Rocks. View is northeast. 1913. Photos cfc00533 and cfc00534 form a panorama. #1:/Yosemite National Park/cfc00534 ID. Calkins, F.C. 534 Yosemite National Park, California. Cleft between North and Middle Cathedral Rocks. View is northeast. 1913. Photos cfc00533 and cfc00534 form a panorama. #1:/Yosemite National Park/cfc00535 ID. Calkins, F.C. 535 Yosemite National Park, California. Down Yosemite Valley from Taft Point. Cathedral Rocks in the center and the entrance to Merced Gorge beyond. 1913. #1:/Yosemite National Park/cfc00540 ID. Calkins, F.C. 540 Yosemite National Park, California. North over Yosemite upland from Horse Ridge. The Yosemite Valley is deeply ensconced below the general level of the upland, and in a view such as this is difficult to find. The summit of El Capitan is in the distant background. 1913. Plate 9-A, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/cfc00542 ID. Calkins, F.C. 542 Yosemite National Park, California. From the vicinity of Quarter Domes, showing an old erosion surface and an erratic in the foreground. 1913. Photos cfc00542 and cfc00543 form a panorama. #1:/Yosemite National Park/cfc00543 ID. Calkins, F.C. 543 Yosemite National Park, California. From the vicinity of Quarter Domes, showing an old erosion surface and an erratic in the foreground. 1913. Photos cfc00542 and cfc00543 form a panorama. #1:/Yosemite National Park/cfc00544 ID. Calkins, F.C. 544 Yosemite National Park, California. Gorge of the Merced River, looking downstream from Coulterville Road. 1913. #1:/Yosemite National Park/cfc00547 ID. Calkins, F.C. 547 Yosemite National Park, California. West from Turtleback Dome. Sloping benches probably eroded along joint planes. 1913. #1:/Yosemite National Park/cfc00551 ID. Calkins, F.C. 551 Yosemite National Park, California. Yosemite Fall, viewed from the road below the village. 1913. #1:/Yosemite National Park/cfc00554 ID. Calkins, F.C. 554 Yosemite National Park, California. Ribbon Fall, viewed from the road above Pohono Bridge. 1913. #1:/Yosemite National Park/cfc00555 ID. Calkins, F.C. 555 Yosemite National Park, California. Nevada Fall, viewed from the trail above Vernal Fall. 1913. #1:/Yosemite National Park/cfc00557 ID. Calkins, F.C. 557 Yosemite National Park, California. Bridalveil Fall, viewed from near its brink. 1913. #1:/Yosemite National Park/cfc00558 ID. Calkins, F.C. 558 Yosemite National Park, California. Water being sprayed up from the brink of Bridalveil Fall. 1913. #1:/Yosemite National Park/cfc00567 ID. Calkins, F.C. 567 Yosemite National Park, California. Clouds Rest, viewed from Union Point. 1915. #1:/Yosemite National Park/cfc00570 ID. Calkins, F.C. 570 Yosemite National Park, California. Lower McGurk Meadow. Ostrander Rocks in background. 1915. #1:/Yosemite National Park/cfc00571 ID. Calkins, F.C. 571 Yosemite National Park, California. Upper McGurk Meadow. Granodiorite outcrop in right center. 1915. #1:/Yosemite National Park/cfc00572 ID. Calkins, F.C. 572 Yosemite National Park, California. Middle Cathedral Rock, viewed from the slope south of Leaning Tower. 1915. #1:/Yosemite National Park/cfc00573 ID. Calkins, F.C. 573 Yosemite National Park, California. El Capitan, Leaning Tower, viewed from Dewey Point. 1915. #1:/Yosemite National Park/cfc00575 ID. Calkins, F.C. 575 Yosemite National Park, California. Cathedral Rocks, viewed from Dewey Point. 1915. #1:/Yosemite National Park/cfc00576 ID. Calkins, F.C. 576 Yosemite National Park, California. Cliffs west of Dewey Point, showing exfoliation in granite. 1915. #1:/Yosemite National Park/cfc00578 ID. Calkins, F.C. 578 Yosemite National Park, California. Lower end of Yosemite Valley and head of Merced Gorge, viewed from the Big Oak Flat Road, showing the sloping barrier of massive granite that encloses the spoon-shaped end of the valley. 1915. Plate 16-A, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/cfc00579 ID. Calkins, F.C. 579 Yosemite National Park, California. Turtleback Dome and Merced Gorge below Yosemite Valley. Turtleback Dome is composed of sparsely and imperfectly jointed granite. The overriding Yosemite Glacier consequently found but few blocks that it could quarry away and confined itself to grinding and smoothing the rock mass. The sharp, hackled edge is controlled wholly by vertical joints. 1915. Plate 43-A, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/cfc00595 ID. Calkins, F.C. 595 Yosemite National Park, California. Mount Hoffmann, viewed from the brink of a canyon north of the mountain. 1915. Photos cfc00595 and cfc00596 form a panorama. #1:/Yosemite National Park/cfc00596 ID. Calkins, F.C. 596 Yosemite National Park, California. Mount Hoffmann, viewed from the brink of a canyon north of the mountain. 1915. Photos cfc00595 and cfc00596 form a panorama. #1:/Yosemite National Park/cfc00597 ID. Calkins, F.C. 597 Yosemite National Park, California. Breaking of a storm in a meadow north of Yosemite. Cathedral Rocks in the right center. October 1916. #1:/Yosemite National Park/cfc00602 ID. Calkins, F.C. 602 Yosemite National Park, California. Left to right: F.E. Matthes, Sidney Paige, and F.C. Calkins at Hog Ranch Camp. 1916. #1:/Yosemite National Park/cfc00604 ID. Calkins, F.C. 604 Yosemite National Park, California. Leaning Tower, viewed from the rim north of Bridalveil Fall. 1915. #1:/Yosemite National Park/cfc00614 ID. Calkins, F.C. 614 Yosemite National Park, California. Three Brothers, viewed from near the top of the talus on the south side of the valley. 1915. #1:/Yosemite National Park/cfc00627 ID. Calkins, F.C. 627 Yosemite National Park, California. Contorted layers of chert exposed in the bed of the Merced River above Ned Gulch. Their crumpled appearance attests impressively to the intense pressure to which the earth's crust was subjected here at the time when the earlier mountains were made. 1915. Plate 26-C, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/cfc00629 ID. Calkins, F.C. 629 Yosemite National Park, California. Laminated chert with steep dip eastward on the Merced River above Ned Gulch. 1915. #1:/Yosemite National Park/cfc00656 ID. Calkins, F.C. 656 Yosemite National Park, California. Little Yosemite Valley and the Clark Range, viewed from Half Dome. The Clark Range stands above the general level of the Yosemite upland of which a long stretch, covered with forests, is visible beyond the Little Yosemite Valley. At the left is Moraine Dome from which the lateral moraines of the ancient Merced Glacier extend in serpentine curves. 1915. Plate 11-B, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/cfc00657 ID. Calkins, F.C. 657 Yosemite National Park, California. Exfoliation on Half Dome, viewed from the north slope of its east shoulder. 1915. #1:/Yosemite National Park/cfc00658 ID. Calkins, F.C. 658 Yosemite National Park, California. Northeast side of Half Dome. This view, taken from the subsidiary dome at the northeast end of the rock mass, reveals exfoliation on a gigantic scale. In the foreground is an old shell disintegrating into undecomposed granite sand, largely as a result of daily temperature changes. 1915. Plate 49, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/cfc00660 ID. Calkins, F.C. 660 Yosemite National Park, California. North face of Half Dome, viewed from the "beak". 1915. #1:/Yosemite National Park/cfc00662 ID. Calkins, F.C. 662 Yosemite National Park, California. Starr King platform, viewed from the top of Half Dome. Mount Starr King on the right. Mount Clark on the left. 1915. #1:/Yosemite National Park/cfc00663 ID. Calkins, F.C. 663 Yosemite National Park, California. Yosemite Fall and Castle Cliffs, viewed from the Sentinel Hotel. 1915. #1:/Yosemite National Park/cfc00665 ID. Calkins, F.C. 665 Yosemite National Park, California. Cliffs west of El Capitan, viewed from the river bank, showing joints of low southward dip. 1915. #1:/Yosemite National Park/cfc00668 ID. Calkins, F.C. 668 Yosemite National Park, California. Cathedral Rocks, viewed from the base of El Capitan, showing some dikes of Bridalveil. 1915. #1:/Yosemite National Park/cfc00669 ID. Calkins, F.C. 669 Yosemite National Park, California. Three Brothers, viewed from the meadow southwest of Yosemite Village, showing the massive siliceous facies of Sentinel Granodiorite. 1915. Photos cfc00669 and 00670 overlap. #1:/Yosemite National Park/cfc00670 ID. Calkins, F.C. 670 Yosemite National Park, California. Three Brothers, viewed from the meadow southwest of Yosemite Village, showing the massive siliceous facies of Sentinel Granodiorite. 1915. Photos cfc00669 and 00670 overlap. Photo 670 shows Eagle Peak. 1915. #1:/Yosemite National Park/cfc00672 ID. Calkins, F.C. 672 Yosemite National Park, California. Buttress west of Yosemite Falls, viewed from near Sentinel Ridge. 1915. #1:/Yosemite National Park/cfc00675 ID. Calkins, F.C. 675 Yosemite National Park, California. Specimen of El Capitan Granite collected from the base of the cliff southwest of Yosemite Village. January 1923. #1:/Yosemite National Park/cfc00676 ID. Calkins, F.C. 676 Yosemite National Park, California. Specimen of Sentinel Granodiorite, Glacier Point facies, with large ragged flakes of biotite, collected from the base of the cliff below Glacier Point. January 1923. #1:/Yosemite National Park/cfc00678 ID. Calkins, F.C. 678 Yosemite National Park, California. Specimen of coarse granite porphyry collected from the cirque northwest of Gray Peak. 1923. #1:/Yosemite National Park/cfc00682 ID. Calkins, F.C. 682 Yosemite National Park, California. Specimen of Cathedral Porphyritic Granite, dark facies, collected from the cirque north of Cathedral Peak. Shows two large phenocrysts of potash feldspar. Circa 1923. #1:/Yosemite National Park/cfc00686 ID. Calkins, F.C. 686 Yosemite National Park, California. Specimen of diorite, probably a facies of Sentinel Granodiorite, collected from a cliff east of Glacier Point. Circa 1923. #1:/Yosemite National Park/cfc00687 ID. Calkins, F.C. 687 Yosemite National Park, California. Specimen of diorite cut by aplite collected from the talus east of El Capitan. Circa 1923. #1:/Yosemite National Park/cfc00688 ID. Calkins, F.C. 688 Yosemite National Park, California. Specimen of Taft Granite collected from talus at the base of El Capitan. Note the even texture. #1:/Yosemite National Park/cfc00689 ID. Calkins, F.C. 689 Yosemite National Park, California. Specimen of hornblende gabbro collected from Oak Flat Road on the rockslides. Facies with irregular hornblende. January 1923. #1:/Yosemite National Park/cfc00697 ID. Calkins, F.C. 697 Yosemite National Park, California. Half Dome Quartz Monzonite. A number of hexagonal tablets of biotite and elongated prisms of hornblende characteristic of this rock are visible in this specimen. 1915. Plate 52-A, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/cfc00699 ID. Calkins, F.C. 699 Yosemite National Park, California. Specimen of Bridalveil Granite collected from just southeast of Dewey Point. January 1923. #1:/Yosemite National Park/cfc00704 ID. Calkins, F.C. 704 Yosemite National Park, California. Specimen of hornblende gabbro facies with prismatic hornblende collected from the top of rockslides. January 1923. #1:/Yosemite National Park/cfc00705 ID. Calkins, F.C. 705 Yosemite National Park, California. Specimen of coarse amphibole gabbro collected from south of McGurk Meadow. January 1923. #1:/Yosemite National Park/cfc0680a ID. Calkins, F.C. 680a Yosemite National Park, California. Specimen of Mount Clark Granite collected from the cirque north of Mount Clark. Dark mineral quartz. Circa 1923. #1:/Yosemite National Park/cfc0680b ID. Calkins, F.C. 680b Yosemite National Park, California. Specimen of metamorphosed tuff, showing faults, collected from the southwest slope of Mount Dana. Circa 1923. #1:/Castillo de San Marcos National Monument/cfg00295 ID. Clapp, F.G. 295 Castillo de San Marcos National Monument, Florida. Interior view of Fort Marion which is built of coquina. Circa 1907. #1:/Clark F.R. Collection/cfr00006 ID. Clark, F.R. 6 Utah Fuel Company's power plant and tipples at Sunnyside. Sunnyside quadrangle, Carbon County, Utah. 1914. #1:/Clark F.R. Collection/cfr00007 ID. Clark, F.R. 7 Utah Fuel Company's power plant and tipples at Sunnyside, Utah. Sunnyside quadrangle, Carbon County, Utah. 1914. #1:/Clark F.R. Collection-American Fuel Company of Utah/cfr00103 ID. Clark, F.R. 103 Looking north from coalmines of the American Fuel Company of Utah. The rocks exposed are of Mesaverde age Taken in Sec. 27,T. 20 S., R. 20 E.. Grand County, Utah. 1914. #1:/Clark F.R. Collection-American Fuel Company of Utah/cfr00104 ID. Clark, F.R. 104 Looking south from same point as photo 103, showing the American Fuel Company of Utah's buildings, loading tipple and washing jigs. Grand County, Utah. 1914. #1:/Clark F.R. Collection-American Fuel Company of Utah/cfr00105 ID. Clark, F.R. 105 Walker Brothers' and others stone quarry in Sec. 33, T. 20 S., R. 20 E. and railroad going to the coal mines of the American Fuel Company of Utah. Grand County, Utah. 1914. #1:/Clark F.R. Collection/cfr00123 ID. Clark, F.R. 123 Castlegate tipple equipped to receive coal from each end. No. 1, outcrop of Castlegate sandstone; No. 2, electric tramway from Mine No. 2 in Willow Creek; No. 3, rope on cable haulage way from mine No. 1 Some graphics on photograph print only. Taken in NW. Sec. 1, T.13 S., R. 9 E. Castlegate quadrangle, Carbon County, Utah.n.d. #1:/Sunset Crater Volcano National Monument/chr00019 ID. Cornwall, H.R. 19 Sunset Crater Volcano National Monument, Arizona. Margin of Bonito flow. 1949. #1:/Sunset Crater Volcano National Monument/chr00021 ID. Cornwall, H.R. 21 Sunset Crater Volcano National Monument, Arizona. Squeeze-up of basalt. 1949. #1:/Sunset Crater Volcano National Monument/chr00022 ID. Cornwall, H.R. 22 Sunset Crater Volcano National Monument, Arizona. Squeeze-up of basalt. 1949. #1:/Sunset Crater Volcano National Monument/chr00023 ID. Cornwall, H.R. 23 Sunset Crater Volcano National Monument, Arizona. Aa flow top. Plates are oriented perpendicular to the direction of flow and the tops of up-ended plates bend toward the source of flow. 1949. #1:/Sunset Crater Volcano National Monument/chr00024 ID. Cornwall, H.R. 24 Sunset Crater Volcano National Monument, Arizona. Aa flow top. Plates are oriented perpendicular to the direction of flow and the tops of up-ended plates bend toward the source of flow. 1949. #1:/Sunset Crater Volcano National Monument/chr00025 ID. Cornwall, H.R. 25 Sunset Crater Volcano National Monument, Arizona. Section of Bonito basalt flow. 1949. #1:/Sunset Crater Volcano National Monument/chr00027 ID. Cornwall, H.R. 27 Sunset Crater Volcano National Monument, Arizona. Flow structure in the top of a recent basalt flow at the mouth of a narrow channel from which lava flowed (lower right-hand corner). Aa plates are up-ended and oriented perpendicular to the direction of flow in the center. Plates and clinkers are strung out parallel to the direction of flow along the margins of the central part. 1949. #1:/Sunset Crater Volcano National Monument/chr00028 ID. Cornwall, H.R. 28 Sunset Crater Volcano National Monument, Arizona. Flow structure in the top of a recent basalt flow at the mouth of a narrow channel from which lava flowed (lower right-hand corner). Aa plates are up-ended and oriented perpendicular to the direction of flow in the center. Plates and clinkers are strung out parallel to the direction of flow along the margins of the central part. 1949. #1:/Sunset Crater Volcano National Monument/chr00030 ID. Cornwall, H.R. 30 Sunset Crater Volcano National Monument, Arizona. Aa top of Bonito flow contains sandstone fragment (white patch above the hammer). 1949. #1:/Sunset Crater Volcano National Monument/chr00032 ID. Cornwall, H.R. 32 Sunset Crater Volcano National Monument, Arizona. Hornito. 1949. #1:/Sunset Crater Volcano National Monument/chr00034 ID. Cornwall, H.R. 34 Sunset Crater Volcano National Monument, Arizona. Aa tops of basalt flows. 1949. #1:/Sunset Crater Volcano National Monument/chr00035 ID. Cornwall, H.R. 35 Sunset Crater Volcano National Monument, Arizona. Aa tops of basalt flows. 1949. #1:/Sunset Crater Volcano National Monument/chr00036 ID. Cornwall, H.R. 36 Sunset Crater Volcano National Monument, Arizona. Aa flow top. 1949. #1:/Sunset Crater Volcano National Monument/chr00037 ID. Cornwall, H.R. 37 Sunset Crater Volcano National Monument, Arizona. Aa flow top. 1949. #1:/Craters of the Moon National Monument/chr00040 ID. Cornwall, H.R. 40 Craters of the Moon National Monument, Idaho. North Crater flow from a large cone contains a large block of cinder (center) that was broken from the wall of the cone and rafted to its present position. 1952. #1:/Craters of the Moon National Monument/chr00044 ID. Cornwall, H.R. 44 Craters of the Moon National Monument, Idaho. Aa margin (center) of a basalt flow that is mostly pahoehoe. 1952. #1:/Craters of the Moon National Monument/chr00045 ID. Cornwall, H.R. 45 Craters of the Moon National Monument, Idaho. Cross section of the upper part of a basalt flow. Aa top overlies basalt that decreases in vesicularity downward. 1952. #1:/Craters of the Moon National Monument/chr00046 ID. Cornwall, H.R. 46 Craters of the Moon National Monument, Idaho. Pahoehoe top of basalt flow. Lava flowed down and away from the camera. Note linear corrugations parallel to the direction of the flow on the steep slope in the foreground and the pileup of ropy lava, convex downstream, where the slope is gentler. 1952. #1:/Craters of the Moon National Monument/chr00047 ID. Cornwall, H.R. 47 Craters of the Moon National Monument, Idaho. Lava tunnel in a basalt flow, called Indian Tunnel. 1952. #1:/Craters of the Moon National Monument/chr00049 ID. Cornwall, H.R. 49 Craters of the Moon National Monument, Idaho. North Crater basalt flow, viewed from the crater rim looking down into the crater where the flow (light gray) welled up from the vent and poured out away from the camera breaching the far wall and flowed away to the right, carrying large hunks of cinder from the crater wall. 1952. #1:/Craters of the Moon National Monument/chr00054 ID. Cornwall, H.R. 54 Craters of the Moon National Monument, Idaho. Line of craters running northwest away from the camera, probably along a fissure. 1952. #1:/Craters of the Moon National Monument/chr00055 ID. Cornwall, H.R. 55 Craters of the Moon National Monument, Idaho. Toes of pahoehoe lava at the front of a small flow. 1952. #1:/Craters of the Moon National Monument/chr00056 ID. Cornwall, H.R. 56 Craters of the Moon National Monument, Idaho. Tongues of pahoehoe lava that flowed out at the front of aa flow. 1952. #1:/Devils Postpile National Monument/chr00073 ID. Cornwall, H.R. 73 Devils Postpile National Monument, California. Columnar joints in a basalt flow near Mammoth Lakes. 1957. #1:/Crater Lake National Park/chr00085 ID. Cornwall, H.R. 85 Crater Lake National Park, Oregon. Crater Lake, looking south toward Wizard Island. 1950. #1:/Crater Lake National Park/chr00086 ID. Cornwall, H.R. 86 Crater Lake National Park, Oregon. Crater Lake, looking north toward Wizard Island. 1950. #1:/Crater Lake National Park/chr00087 ID. Cornwall, H.R. 87 Crater Lake National Park, Oregon. Crater Lake, looking west toward Wizard Island. 1950. #1:/Clark J.C. Collection/cjc00011 ID. Clark, J.C. 11 Santa Cruz Mudstone capped by marine terrace sand at Natural Bridges Beach State Park near Santa Cruz. View west toward lowest emergent marine terrace. Southwest of San Andreas fault in central Santa Cruz Mountains. Santa Cruz County, California. ca. 1963. Figure 10 in U.S. Geological Survey. Professional paper 1168. 1981. #1:/Grand Canyon National Park/cme00003 ID. Cooley, M.E. 3 Grand Canyon National Park, Arizona. Shinumo Creek, looking upstream. The crest of the flood of December 1966 (indicated by level rod) was about 5.5 feet (1.7 meters) above the creek bed and did not inundate the terraces 6 feet (1.8 meters) above the bed. At this site, the flood flow cleared only the bed because the sides of the channel and the terraces were protected by dense riparian vegetation. Circa 1966. Figure 4, U.S. Geological Survey Professional Paper 980. #1:/Grand Canyon National Park/cme00004 ID. Cooley, M.E. 4 Grand Canyon National Park, Arizona. Edge of the mudflow at the mouth of Crystal Creek where a sample was taken to estimate the consistency of the mud during the flood of December 1966. The mud (dark deposits) flowed over the pre-flood deposits (light deposits indicated by spade) of the Colorado River. Circa 1966. Figure 6, U.S. Geological Survey Professional Paper 980. #1:/Grand Canyon National Park/cme00005 ID. Cooley, M.E. 5 Grand Canyon National Park, Arizona. Dragon Creek, looking downstream along the slope-area reach after the flood of December 1966. Note channel scoured to clean bedrock. Circa 1966. Figure 7-A, U.S. Geological Survey Professional Paper 980. #1:/Grand Canyon National Park/cme00006 ID. Cooley, M.E. 6 Grand Canyon National Park, Arizona. Dragon Creek after the flood of December 1966, looking across the channel from the east side. The height of the eroded west bank averages about 12 feet (3.7 meters). Circa 1966. Figure 7-B, U.S. Geological Survey Professional Paper 980. #1:/Grand Canyon National Park/cme00007 ID. Cooley, M.E. 7 Grand Canyon National Park, Arizona. Crystal Creek above Dragon Creek, looking upstream. The channel conditions in this reach probably are representative of those in most of Crystal Creek prior to the flood of December 1966, because the channel was changed little by the flood. Circa 1966. Figure 8, U.S. Geological Survey Professional Paper 980. #1:/Grand Canyon National Park/cme00008 ID. Cooley, M.E. 8 Grand Canyon National Park, Arizona. Debris slide along the Point Sublime Trail quarter of a mile (0.4 kilometer) east of Outlet Canyon after the flood of December 1966. Circa 1966. Figure 9, U.S. Geological Survey Professional Paper 980. #1:/Grand Canyon National Park/cme00009 ID. Cooley, M.E. 9 Grand Canyon National Park, Arizona. Damage to structures in Bright Angel Canyon caused by the flood of December 1966. Powerhouse in middle foreground. Residence at right center. Bridge and pipeline in the foreground. The channel of Bright Angel Creek is now established behind the bridge and under the powerhouse. Note the debris on the bridge. Circa 1966. Figure 10, U.S. Geological Survey Professional Paper 980. #1:/Grand Canyon National Park/cme00010 ID. Cooley, M.E. 10 Grand Canyon National Park, Arizona. Exposed pipeline near Ribbon Falls. Prior to the flood of December 1966, a 40-foot (12-meter) bridge crossed Bright Angel Creek in the center. The channel is now about 150 feet (46 meters) wide and is bordered by a single terrace. Figure 11, U.S. Geological Survey Professional Paper 980. #1:/Grand Canyon National Park/cme00011 ID. Cooley, M.E. 11 Grand Canyon National Park, Arizona. Bright Angel Creek stream channel before the flood of December 1966. Poles shown the alignment of the pipeline. Circa 1966. Figure 12-A, U.S. Geological Survey Professional Paper 980. See also photo cme00012. #1:/Grand Canyon National Park/cme00012 ID. Cooley, M.E. 12 Grand Canyon National Park, Arizona. Bright Angel Creek after the flood of December 1966. Exposed pipeline showing. Circa 1966. Figure 12-B, U.S. Geological Survey Professional Paper 980. See also photo cme00011. #1:/Grand Canyon National Park/cme00014 ID. Cooley, M.E. 14 Grand Canyon National Park, Arizona. Damage to the Phantom Ranch Campground caused by the flood of December 1966. Prior to the flood, restrooms were located in the area in the center, and a bridge crossed the creek in the foreground to provide access to the campground. The fireplace at left center indicates the former ground level. Circa 1966. Figure 14, U.S. Geological Survey Professional Paper 980. #1:/Grand Canyon National Park/cme00020 ID. Cooley, M.E. 20 Grand Canyon National Park, Arizona. Mudflow debris on the terrace on the right bank of Dragon Creek after the flood of December 1966. The location of the mescal pit, which was destroyed by the flood, is near that of the helicopter. Mudflow debris covers this area from canyon wall to canyon wall. Circa 1966. Figure 17, U.S. Geological Survey Professional Paper 980. #1:/Grand Canyon National Park/cme00021 ID. Cooley, M.E. 21 Grand Canyon National Park, Arizona. Walhalla Glades. The flood of December 1966 deepened the channel - renewed arroyo cutting - by 0.5 to 2 feet (0.2 to 0.6 meter) downstream. Upstream the channel was deepened intermittently by scours. The low bench on the right side of the channel represents the level of the channel prior to the flood. The level rod indicates the crest of the flood. Circa 1966. Figure 18, U.S. Geological Survey Professional Paper 980. #1:/Grand Canyon National Park/cme00023 ID. Cooley, M.E. 23 Grand Canyon National Park, Arizona. Effects of the flood of December 1966 along Clear Creek tributary 3 on the Walhalla Plateau. Gravel bar deposited downstream from the 300-foot long (90-meter long) scour. Circa 1966. Figure 19-C, U.S. Geological Survey Professional Paper 980. #1:/Grand Canyon National Park/cme00029 ID. Cooley, M.E. 29 Grand Canyon National Park, Arizona. Scar of the main mudflow-debris slide that contributed much debris to the mudflow in Natchi Canyon after the flood of December 1966. Direction of movement was from left to right over the almost vertical cliff on the left. Circa 1966. Figure 24, U.S. Geological Survey Professional Paper 980. #1:/Grand Canyon National Park/cme00030 ID. Cooley, M.E. 30 Grand Canyon National Park, Arizona. Gravel-floored channel of Nankoweap Creek after the flood of December 1966. Looking upstream, along Nankoweap Creek, from a small gravel bar upstream from gravel bar 2 to the lower end of gravel bar 1, where the three men are standing. Circa 1966. Figure 26-A, U.S. Geological Survey Professional Paper 980. #1:/Grand Canyon National Park/cme00031 ID. Cooley, M.E. 31 Grand Canyon National Park, Arizona. Gravel-floored channel of Nankoweap Creek after the flood of December 1966. Looking downstream, along Nankoweap Creek. The narrow channel in the center is where the peak of the flood was 3.5 to 4 feet (1.1 to 1.2 meters) above the present channel. The low 5-foot (1.5-meter) high terrace at left center was not inundated. During the flood peak, the channel apparently was deepened and was filled by pebble- to small cobble- size material during the declining stage of the flood. Circa 1966. Figure 26-B, U.S. Geological Survey Professional Paper 980. #1:/Grand Canyon National Park/cme00033 ID. Cooley, M.E. 33 Grand Canyon National Park, Arizona. Channel of Lava Creek after the flood of December 1966. Looking downstream along Lava Creek where the creek is confined between terraces - few of which were inundated by the mudflow. Circa 1966. Figure 29-B, U.S. Geological Survey Professional Paper 980. #1:/Grand Canyon National Park/cme00037 ID. Cooley, M.E. 37 Grand Canyon National Park, Arizona. Bright Angel Creek 1,000 feet (305 meters) above its mouth. Channel after the flood of December 1966. Circa 1966. Figure 30-B, U.S. Geological Survey Professional Paper 980. #1:/Grand Canyon National Park/cme00038 ID. Cooley, M.E. 38 Grand Canyon National Park, Arizona. Mouth of Bright Angel Creek after the flood of December 1966. The only remaining undamaged bridge over Bright Angel Creek is at lower right. Trail at left center connects the Colorado River suspension bridge with Phantom Ranch, which is behind the viewer. Circa 1966. Figure 31, U.S. Geological Survey Professional Paper 980. #1:/Grand Canyon National Park/cme00039 ID. Cooley, M.E. 39 Grand Canyon National Park, Arizona. Bright Angel Creek near Phantom Ranch before the flood of August 1936. Channel of Bright Angel Creek in May 1936. The trail to Phantom Ranch is bounded by the line of rocks in the left foreground. Figure 32-A, U.S. Geological Survey Professional Paper 980. #1:/Gauley River National Recreation Area/cmr00032 ID. Campbell, M.R. 32 Gauley River National Recreation Area, West Virginia. Down the Gauley River from the south side of the river near Carnifax Ferry. 1895. #1:/New River Gorge National River/cmr00034 ID. Campbell, M.R. 34 New River Gorge National River, West Virginia. Looking west from the cliffs on the north side of New River. Nuttallburg in the middle distance. 1899. #1:/New River Gorge National River/cmr00035 ID. Campbell, M.R. 35 New River Gorge National River, West Virginia. Looking south or up New River from the cliffs above Nuttallburg. 1899. #1:/New River Gorge National River/cmr00037 ID. Campbell, M.R. 37 New River Gorge National River, West Virginia. New River, viewed from the cliffs above Fire Creek. 1895. Photos cmr00037, cmr00038, and cmr00039 form a panorama. #1:/New River Gorge National River/cmr00038 ID. Campbell, M.R. 38 New River Gorge National River, West Virginia. New River, viewed from the cliffs above Fire Creek. 1895. Photos cmr00037, cmr00038, and cmr00039 form a panorama. #1:/New River Gorge National River/cmr00039 ID. Campbell, M.R. 39 New River Gorge National River, West Virginia. New River, viewed from the cliffs above Fire Creek. 1895. Photos cmr00037, cmr00038, and cmr00039 form a panorama. #1:/New River Gorge National River/cmr00040 ID. Campbell, M.R. 40 New River Gorge National River, West Virginia. Looking downstream from the cliffs above Nuttallburg. 1899. Photos cmr00040 and cmr00041 form a panorama. #1:/New River Gorge National River/cmr00041 ID. Campbell, M.R. 41 New River Gorge National River, West Virginia. Looking downstream from the cliffs above Nuttallburg. 1899. Photos cmr00040 and cmr00041 form a panorama. #1:/New River Gorge National River/cmr00042 ID. Campbell, M.R. 42 New River Gorge National River, West Virginia. Looking up river from cliffs 900 feet above stream. Nuttallburg in the foreground. 1899. #1:/New River Gorge National River/cmr00043 ID. Campbell, M.R. 43 New River Gorge National River, West Virginia. New River, viewed from the cliffs above Nuttallburg, looking upstream. This view is slightly to the left of that in photo cmr00035. 1899. #1:/New River Gorge National River/cmr00044 ID. Campbell, M.R. 44 New River Gorge National River, West Virginia. Keeney Creek Railroad. Massive blocks of Nuttall Sandstone cumber the New River slopes near Nuttallburg. 1895. #1:/New River Gorge National River/cmr00048 ID. Campbell, M.R. 48 New River Gorge National River, West Virginia. View from the Chesapeake and Ohio Railroad tracks just below the Nuttall Mines, looking downstream. Cliffs of Fayette Sandstone in the distance. 1895. #1:/New River Gorge National River/cmr00069 ID. Campbell, M.R. 69 New River Gorge National River, West Virginia. Looking up New River from the cliffs below Nuttallburg. 1895. #1:/New River Gorge National River/cmr00075 ID. Campbell, M.R. 75 New River Gorge National River, West Virginia. Looking downstream from the cliff on the south side of New River on the trail from Nuttall to Fayetteville. 1899. #1:/New River Gorge National River/cmr00076 ID. Campbell, M.R. 76 New River Gorge National River, West Virginia. Fayette Sandstone cliffs above Nuttall. 1899. #1:/New River Gorge National River/cmr00081 ID. Campbell, M.R. 81 New River Gorge National River, West Virginia. Cliffs of Nuttall Sandstone forming the rim of New River canyon above Nuttallburg, looking downstream to the west. 1899 #1:/New River Gorge National River/cmr00082 ID. Campbell, M.R. 82 New River Gorge National River, West Virginia. Cliffs of Nuttall Sandstone forming the rim of New River canyon above Nuttallburg, looking downstream to the west. 1899. #1:/New River Gorge National River/cmr00104 ID. Campbell, M.R. 104 New River Gorge National River, West Virginia. Down the New River from the cliffs behind Nuttall. 1899. See also photo cmr00105. #1:/New River Gorge National River/cmr00105 ID. Campbell, M.R. 105 New River Gorge National River, West Virginia. Down the New River from the cliffs behind Nuttall, at a lower elevation than photo cmr00104. 1899. #1:/New River Gorge National River/cmr00112 ID. Campbell, M.R. 112 New River Gorge National River, West Virginia. New River, viewed from the cliffs behind Fire Creek. 1899. Photos cmr00112 through 00117 form a panorama. #1:/New River Gorge National River/cmr00113 ID. Campbell, M.R. 113 New River Gorge National River, West Virginia. New River, viewed from the cliffs behind Fire Creek. 1899. Photos cmr00112 through 00117 form a panorama. #1:/New River Gorge National River/cmr00114 ID. Campbell, M.R. 114 New River Gorge National River, West Virginia. New River, viewed from the cliffs behind Fire Creek. 1899. Photos cmr00112 through 00117 form a panorama. #1:/New River Gorge National River/cmr00115 ID. Campbell, M.R. 115 New River Gorge National River, West Virginia. New River, viewed from the cliffs behind Fire Creek. 1899. Photos cmr00112 through 00117 form a panorama. #1:/New River Gorge National River/cmr00116 ID. Campbell, M.R. 116 New River Gorge National River, West Virginia. New River, viewed from the cliffs behind Fire Creek. 1899. Photos cmr00112 through 00117 form a panorama. #1:/New River Gorge National River/cmr00117 ID. Campbell, M.R. 117 New River Gorge National River, West Virginia. New River, viewed from the cliffs behind Fire Creek. 1899. Photos cmr00112 through 00117 form a panorama. #1:/Death Valley National Park/cmr00176 ID. Campbell, M.R. 176 Funeral Mountains. View is southwest from the forks of Furnace Creek. Death Valley is in the distance on the right. Photographer's shadow in the lower right. 1901. #1:/Death Valley National Park/cmr00177 ID. Campbell, M.R. 177 Death Valley National Park, California. Down Furnace Creek from a point about 6 miles above Death Valley. Furnace Mountains in the background. 1901. #1:/Death Valley National Park/cmr00178 ID. Campbell, M.R. 178 Death Valley National Park, California. Funeral Mountains, showing edges of the incline lake beds coming down to the edge of Death Valley. View is east from a point about 8 miles south of Greenland Ranch. 1901. #1:/Death Valley National Park/cmr00179 ID. Campbell, M.R. 179 Death Valley National Park, California. Salt field in the bottom of Death Valley where it is crossed by the old borax road from Greenland Ranch to Bennett Wells. 1901. #1:/Grand Canyon National Park/cmr00328 ID. Campbell, M.R. 328 Grand Canyon National Park, Arizona. Up the canyon from O'Neil's Point. 1903. Photos cmr00328 and cmr00329 form a panorama. #1:/Grand Canyon National Park/cmr00329 ID. Campbell, M.R. 329 Grand Canyon National Park, Arizona. Up the canyon from O'Neil's Point. 1903. Photos cmr00328 and cmr00329 form a panorama. #1:/Grand Canyon National Park/cmr00331 ID. Campbell, M.R. 331 Grand Canyon National Park, Arizona. Grand Canyon, viewed from above O'Neil's Point. 1903. #1:/Grand Canyon National Park/cmr00332 ID. Campbell, M.R. 332 Grand Canyon National Park, Arizona. Up the canyon, viewed from above O'Neil's point. 1903. Photos cmr00332 and cmr00333 form a panorama. #1:/Grand Canyon National Park/cmr00333 ID. Campbell, M.R. 333 Grand Canyon National Park, Arizona. Up the canyon, viewed from above O'Neil's point. 1903. Photos cmr00332 and cmr00333 form a panorama. #1:/Grand Canyon National Park/cmr00334 ID. Campbell, M.R. 334 Grand Canyon National Park, Arizona. Toward the Bright Angel Hotel (right side of photos cmr00334 and cmr00335) and the canyon wall. 1903. Photos cmr00334, cmr00335, and cmr00336 form a panorama. #1:/Grand Canyon National Park/cmr00335 ID. Campbell, M.R. 335 Grand Canyon National Park, Arizona. Toward the Bright Angel Hotel (right side of photos cmr00334 and cmr00335) and the canyon wall. 1903. Photos cmr00334, cmr00335, and cmr00336 form a panorama. #1:/Grand Canyon National Park/cmr00336 ID. Campbell, M.R. 336 Grand Canyon National Park, Arizona. Toward the Bright Angel Hotel (right side of photos cmr00334 and cmr00335) and the canyon wall. 1903. Photos cmr00334, cmr00335, and cmr00336 form a panorama. #1:/Grand Canyon National Park/cmr00337 ID. Campbell, M.R. 337 Grand Canyon National Park, Arizona. Looking into the canyon from near Sentinel Point. 1903. #1:/Grand Canyon National Park/cmr00338 ID. Campbell, M.R. 338 Grand Canyon National Park, Arizona. Looking into the canyon from a place between Sentinel Point and the Bright Angel Hotel. 1903. #1:/Grand Canyon National Park/cmr00339 ID. Campbell, M.R. 339 Grand Canyon National Park, Arizona. Looking into the canyon from a point just west of the Bright Angel Hotel. 1903. #1:/Grand Canyon National Park/cmr00340 ID. Campbell, M.R. 340 Grand Canyon National Park, Arizona. Rowes Point, viewed from Sentinel Point, looking west. 1903. #1:/Grand Canyon National Park/cmr00341 ID. Campbell, M.R. 341 Grand Canyon National Park, Arizona. Into the canyon, viewed from just east of the Bright Angel Hotel. 1903. #1:/Grand Canyon National Park/cmr00343 ID. Campbell, M.R. 343 Grand Canyon National Park, Arizona. Up the canyon from above Rowes Point. 1903. #1:/Grand Canyon National Park/cmr00344 ID. Campbell, M.R. 344 Grand Canyon National Park, Arizona. Grand Canyon, viewed from a point above Rowes Point. 1903. #1:/Grand Canyon National Park/cmr00345 ID. Campbell, M.R. 345 Grand Canyon National Park, Arizona. Into the canyon from Bright Angel Trail just above Red Wall. 1903. #1:/Grand Canyon National Park/cmr00346 ID. Campbell, M.R. 346 Grand Canyon National Park, Arizona. Bright Angel Trail near Cape Horn. 1903. #1:/Grand Canyon National Park/cmr00347 ID. Campbell, M.R. 347 Grand Canyon National Park, Arizona. Looking from Bright Angel Trail into the canyon from the Red Wall. 1903. #1:/Grand Canyon National Park/cmr00349 ID. Campbell, M.R. 349 Grand Canyon National Park, Arizona. Grand Canyon, viewed from Bright Angel Trail just at the top of Red Wall. 1903. #1:/Grand Canyon National Park/cmr00350 ID. Campbell, M.R. 350 Grand Canyon National Park, Arizona. Cameron's camp. 1903. #1:/Grand Canyon National Park/cmr00351 ID. Campbell, M.R. 351 Grand Canyon National Park, Arizona. Toward the Tonto Platform and Vishnu Temple from Bright Angel Trail. 1903. #1:/Grand Canyon National Park/cmr00352 ID. Campbell, M.R. 352 Grand Canyon National Park, Arizona. Bright Angel Trail in the granite. Some contorted Algonkian rocks visible in the distance. 1903. #1:/Grand Canyon National Park/cmr00353 ID. Campbell, M.R. 353 Grand Canyon National Park, Arizona. On the Bright Angel Trail at the head of the Cork Screw. 1903. #1:/Grand Canyon National Park/cmr00354 ID. Campbell, M.R. 354 Grand Canyon National Park, Arizona. Bright Angel Trail just entering the granite. 1903. #1:/Grand Canyon National Park/cmr00355 ID. Campbell, M.R. 355 Grand Canyon National Park, Arizona. Colorado River, viewed from Bright Angel Trail, looking downstream. 1903. #1:/Grand Canyon National Park/cmr00356 ID. Campbell, M.R. 356 Grand Canyon National Park, Arizona. Colorado River, viewed from Bright Angel Trail, looking upstream. 1903. #1:/Grand Canyon National Park/cmr00357 ID. Campbell, M.R. 357 Grand Canyon National Park, Arizona. Colorado River, viewed from Bright Angel Trail, looking upstream. Tourists in the foreground. 1903. #1:/Grand Canyon National Park/cmr00358 ID. Campbell, M.R. 358 Grand Canyon National Park, Arizona. Grand Canyon, viewed from Rowe's Point, looking up the canyon. 1903. #1:/Grand Canyon National Park/cmr00359 ID. Campbell, M.R. 359 Grand Canyon National Park, Arizona. Looking up the canyon from O'Neil's Point. 1903. #1:/Grand Canyon National Park/cmr00361 ID. Campbell, M.R. 361 Grand Canyon National Park, Arizona. Small point in the vicinity of Sentinel Point. 1903. #1:/Grand Canyon National Park/cmr00362 ID. Campbell, M.R. 362 Grand Canyon National Park, Arizona. From the cliff above O'Neil's Point, looking down the canyon. 1903. #1:/Grand Canyon National Park/cmr00363 ID. Campbell, M.R. 363 Grand Canyon National Park, Arizona. From the cliff above O'Neil's Point, looking down the canyon. 1903. #1:/Grand Canyon National Park/cmr00364 ID. Campbell, M.R. 364 Grand Canyon National Park, Arizona. Up the canyon at O'Neil's Point from near the Bright Angel Hotel. 1903. #1:/Grand Canyon National Park/cmr00365 ID. Campbell, M.R. 365 Grand Canyon National Park, Arizona. Small point near Sentinel Point. 1903. #1:/Grand Canyon National Park/cmr00366 ID. Campbell, M.R. 366 Grand Canyon National Park, Arizona. Into the canyon from near Sentinel Point. 1903. #1:/Grand Canyon National Park/cmr00367 ID. Campbell, M.R. 367 Grand Canyon National Park, Arizona. O'Neil's Point, looking up the canyon. 1903. #1:/Grand Canyon National Park/cmr00370 ID. Campbell, M.R. 370 Grand Canyon National Park, Arizona. Grand Canyon, viewed from O'Neil's Point. 1903. #1:/Grand Canyon National Park/cmr00371 ID. Campbell, M.R. 371 Grand Canyon National Park, Arizona. Grand Canyon near Sentinel point. 1903. #1:/Campbell M.R. Collection-Porter Mine/cmr00480 ID. Campbell, M.R. 480 Porter Mine. La Plata County, Colorado. 1905. #1:/Campbell M.R. Collection/cmr00496 ID. Campbell, M.R. 496 Mine building at Creede. Mineral County, Colorado. 1905. #1:/Glacier National Park/cmr00690 ID. Campbell, M.R. 690 Glacier National Park, Montana. Near Swiftcurrent Creek and Altyn, looking south. Allen Mountain in the middle distance. 1907. #1:/Glacier National Park/cmr00694 ID. Campbell, M.R. 694 Glacier National Park, Montana. Upper Saint Mary Lake, viewed from The Narrows, looking north at the fault at the base of the cliffs on the left. 1907. See also photo cmr00695. #1:/Glacier National Park/cmr00695 ID. Campbell, M.R. 695 Glacier National Park, Montana. Upper Saint Mary Lake on the left, viewed from The Narrows, looking north at the fault at the base of the cliffs. 1907. Partly overlaps photo cmr00694. #1:/Glacier National Park/cmr00696 ID. Campbell, M.R. 696 Glacier National Park, Montana. Upper Saint Mary Lake, viewed from The Narrows, looking west. 1907. #1:/Glacier National Park/cmr00698 ID. Campbell, M.R. 698 Glacier National Park, Montana. Upper Saint Mary Lake, viewed from The Narrows, looking west. 1907. #1:/Canyon de Chelly National Monument/cmr00829 ID. Campbell, M.R. 829 Canyon de Chelly National Monument, Arizona. White House cliff dwelling in a shelf of the rock. The main cliff is about 400 feet high. 1909. #1:/Canyon de Chelly National Monument/cmr00830 ID. Campbell, M.R. 830 Canyon de Chelly National Monument, Arizona. The White House, showing ruins on shelf and also ruins on flood plain of the stream. The former are not now accessible. 1909. #1:/Glacier National Park/cmr00871 ID. Campbell, M.R. 871 Glacier National Park, Montana. Belton Chalet. 1910. #1:/Glacier National Park/cmr00873 ID. Campbell, M.R. 873 Glacier National Park, Montana. Logan's camp at Lake McDonald at the mouth of Fish Creek. Left to right: William R. Logan, Superintendent; Clement S. Ucker, chief clerk; and W.W. Phillips. 1910. #1:/Glacier National Park/cmr00877 ID. Campbell, M.R. 877 Glacier National Park, Montana. Snow bank on Swiftcurrent Trail, just east of the summit of Swiftcurrent Mountain(?). 1910. #1:/Glacier National Park/cmr00878 ID. Campbell, M.R. 878 Glacier National Park, Montana. Thomas Jefferson, one of the early prospectors and hunters, and his horse Skookum at Granite Park. Mr. Jefferson came to this part of the country about 1882. 1910. Plate 1-A, U.S. Geological Survey Bulletin 600. #1:/Glacier National Park/cmr00879 ID. Campbell, M.R. 879 Glacier National Park, Montana. Swiftcurrent Valley, viewed from near the summit of the pass. 1910. #1:/Glacier National Park/cmr00880 ID. Campbell, M.R. 880 Glacier National Park, Montana. Mount Wilbur, viewed from Swiftcurrent Trail, just below the summit. 1910. #1:/Glacier National Park/cmr00881 ID. Campbell, M.R. 881 Glacier National Park, Montana. Base of Siyeh Limestone near the top of a precipitous slope on Swiftcurrent Trail, just east of the summit of the pass. 1910. #1:/Glacier National Park/cmr00884 ID. Campbell, M.R. 884 Glacier National Park, Montana. South of McDermott Lake (Swiftcurrent Lake), viewed from camp on the north shore. Allen Mountain on the right. 1910. Photos cmr00884 and cmr00885 form a panorama. #1:/Glacier National Park/cmr00885 ID. Campbell, M.R. 885 Glacier National Park, Montana. South of McDermott Lake (Swiftcurrent Lake), viewed from camp on the north shore. Allen Mountain on the right. 1910. Photos cmr00884 and cmr00885 form a panorama. #1:/Glacier National Park/cmr00891 ID. Campbell, M.R. 891 Glacier National Park, Montana. Poia Lake on Kennedy Creek, showing a landslide from the mountain slope on the south that crossed the valley and dammed the creek forming a lake three-quarters of a mile long. 1910. Photos cmr00891 and cmr00892 form a panorama. #1:/Glacier National Park/cmr00892 ID. Campbell, M.R. 892 Glacier National Park, Montana. Poia Lake on Kennedy Creek, showing a landslide from the mountain slope on the south that crossed the valley and dammed the creek forming a lake three-quarters of a mile long. 1910. Photos cmr00891 and cmr00892 form a panorama. #1:/Glacier National Park/cmr00893 ID. Campbell, M.R. 893 Glacier National Park, Montana. West point of a gravel ridge 3 miles east of Chief Mountain, looking up Kennedy Creek. Chief Mountain on the right (photo cmr00395). Yellow Mountain on the left (photo cmr00893). 1910. Photos cmr00893, cmr00894, cmr00895 form a panorama. #1:/Glacier National Park/cmr00894 ID. Campbell, M.R. 894 Glacier National Park, Montana. West point of a gravel ridge 3 miles east of Chief Mountain, looking up Kennedy Creek. Chief Mountain on the right (photo cmr00395). Yellow Mountain on the left (photo cmr00893). 1910. Photos cmr00893, cmr00894, cmr00895 form a panorama. #1:/Glacier National Park/cmr00895 ID. Campbell, M.R. 895 Glacier National Park, Montana. West point of a gravel ridge 3 miles east of Chief Mountain, looking up Kennedy Creek. Chief Mountain on the right (photo cmr00395). Yellow Mountain on the left (photo cmr00893). 1910. Photos cmr00893, cmr00894, cmr00895 form a panorama. #1:/Glacier National Park/cmr00902 ID. Campbell, M.R. 902 Glacier National Park, Montana. Gunsight Pass, viewed from Gunsight Lake. 1910. #1:/Glacier National Park/cmr00903 ID. Campbell, M.R. 903 Glacier National Park, Montana. Gunsight Lake and Going-to-the-Sun Mountain. 1910. #1:/Glacier National Park/cmr00937 ID. Campbell, M.R. 937 Glacier National Park, Montana. Looking west from Cut Bank Pass: Mount Stimpson is the high peak in the center, Mount Pinchot the saddle mountain on the left, Eaglehead Mountain the pyramid in the distance, Mount Phillips on the extreme left, and Blackfeet Mountain and Pumpelly Glacier on the extreme right. Cut Bank Pass was crossed by Lt. Tinkham in 1853. 1911. Plate 10, U.S. Geological Survey Bulletin 600. Photos cmr00937 and cmr00938 form a panorama. #1:/Glacier National Park/cmr00938 ID. Campbell, M.R. 938 Glacier National Park, Montana. Looking west from Cut Bank Pass: Mount Stimpson is the high peak in the center, Mount Pinchot the saddle mountain on the left, Eaglehead Mountain the pyramid in the distance, Mount Phillips on the extreme left, and Blackfeet Mountain and Pumpelly Glacier on the extreme right. Cut Bank Pass was crossed by Lt. Tinkham in 1853. 1911. Plate 10, U.S. Geological Survey Bulletin 600. Photos cmr00937 and cmr00938 form a panorama. #1:/Glacier National Park/cmr00939 ID. Campbell, M.R. 939 Glacier National Park, Montana. Valley on upper Cut Bank Creek, viewed from the summit just above the small lake at the extreme head of the valley, looking north. Camp at the foot of the lake. 1911. #1:/Glacier National Park/cmr00940 ID. Campbell, M.R. 940 Glacier National Park, Montana. Fault in the mountain front on Fortymile Creek, looking south. Altyn Limestone at the base and also faulted up, forming a nearly vertical ledge across the top of the mountain. 1911. #1:/Glacier National Park/cmr00942 ID. Campbell, M.R. 942 Glacier National Park, Montana. Upper Two Medicine Lake and Valley, viewed from a point on the ridge on the south, 1,200 feet above the lake. 1911. #1:/Glacier National Park/cmr00946 ID. Campbell, M.R. 946 Glacier National Park, Montana. Swiftcurrent Valley, viewed from just below Swiftcurrent Pass, looking east or down the valley. Part of Grinnell Mountain on the right and Appekunny on the left. 1911. #1:/Glacier National Park/cmr00949 ID. Campbell, M.R. 949 Glacier National Park, Montana. Pack train coming down Swiftcurrent Trail. 1911. #1:/Glacier National Park/cmr00950 ID. Campbell, M.R. 950 Glacier National Park, Montana. Small glacier at the head of Swiftcurrent Valley south of the trail, viewed from a point near the trail, looking south. August 27, 1911. #1:/Glacier National Park/cmr00953 ID. Campbell, M.R. 953 Glacier National Park, Montana. Iceberg Lake with ice floating in it, viewed from a point near the cabin on the north fork of Swiftcurrent Creek 1911. #1:/Glacier National Park/cmr00959 ID. Campbell, M.R. 959 Glacier National Park, Montana. From the Continental Divide just back of Sue Lake: Mount Cleveland on the left, Mount Merritt on the right, valley of the middle fork of the Belly River in the center. 1911. Plate 7-A, U.S. Geological Survey Bulletin 600. Photos cmr00959 and cmr00960 form a panorama. #1:/Glacier National Park/cmr00960 ID. Campbell, M.R. 960 Glacier National Park, Montana. From the Continental Divide just back of Sue Lake: Mount Cleveland on the left, Mount Merritt on the right, valley of the middle fork of the Belly River in the center. 1911. Plate 7-A, U.S. Geological Survey Bulletin 600. Photos cmr00959 and cmr00960 form a panorama. #1:/Glacier National Park/cmr00961 ID. Campbell, M.R. 961 Glacier National Park, Montana. Head of the middle fork of the Belly River (Mokowanis River), looking northwest. Sheppard Glacier in the left foreground. 1911. #1:/Glacier National Park/cmr00962 ID. Campbell, M.R. 962 Glacier National Park, Montana. Head of the middle fork of the Belly River (Mokowanis River), viewed from the front of Chaney Glacier. 1911. #1:/Glacier National Park/cmr00963 ID. Campbell, M.R. 963 Glacier National Park, Montana. Head of the middle fork of the Belly River (Mokowanis River), viewed from the front of Sheppard Glacier. Glenns Lake and Cosley Lake in the distant center. Pyramid Peak on the right. 1911. #1:/Glacier National Park/cmr00964 ID. Campbell, M.R. 964 Glacier National Park, Montana. Head of the middle fork of the Belly River (Mokowanis River), viewed from the front of Chaney Glacier. Glenns Lake in the distance. 1911. #1:/Glacier National Park/cmr00965 ID. Campbell, M.R. 965 Glacier National Park, Montana. Chaney Glacier, looking south towards Mount Kipp. 1911 #1:/Glacier National Park/cmr00966 ID. Campbell, M.R. 966 Glacier National Park, Montana. Lower part of Chaney Glacier, looking southeast. Vertical cliff on the left is fully 2,500 feet high. 1911. #1:/Glacier National Park/cmr00967 ID. Campbell, M.R. 967 Glacier National Park, Montana. Breakfast at the U.S. Geological Survey camp at Kipps cabin on (East?)Flattop Mountain. August 25, 1911. #1:/Glacier National Park/cmr00970 ID. Campbell, M.R. 970 Glacier National Park, Montana. Bowman Lake, viewed from near the head of the lake, looking northeast. Screen not used. 1911. Compare with photo cmr00969. #1:/Glacier National Park/cmr00973 ID. Campbell, M.R. 973 Glacier National Park, Montana. Bowman Lake, viewed from camp at the lower end. Rainbow Peak on the right. 1911. #1:/Glacier National Park/cmr00974 ID. Campbell, M.R. 974 Glacier National Park, Montana. Rainbow Peak, viewed from near Bowman Lake outlet. 1911. #1:/Glacier National Park/cmr00975 ID. Campbell, M.R. 975 Glacier National Park, Montana.U.S. Geological Survey party in camp at Jefferson ranch, probably Sullivan Meadow. Left to right: J.Elmer Thomas, J.R. Hoats, dog "Bumsky," Charlie McCarthy, W.C. Alden, Thomas Jefferson (the prospector), his dog, and Archie Hurtebese. 1911. #1:/Glacier National Park/cmr00976 ID. Campbell, M.R. 976 Glacier National Park, Montana. Thomas Jefferson at the front door of his ranch house near Sullivan Meadow. 1911. #1:/Glacier National Park/cmr00977 ID. Campbell, M.R. 977 Glacier National Park, Montana. From Heavens Peak on the right (photo cmr00980) to Kintla Peak on the left (photo cmr00977). 1911. Photos cmr00977, cmr00978, cmr00979, cmr00980 form a panorama. #1:/Glacier National Park/cmr00978 ID. Campbell, M.R. 978 Glacier National Park, Montana. From Heavens Peak on the right (photo cmr00980) to Kintla Peak on the left (photo cmr00977). 1911. Photos cmr00977, cmr00978, cmr00979, cmr00980 form a panorama. #1:/Glacier National Park/cmr00979 ID. Campbell, M.R. 979 Glacier National Park, Montana. From Heavens Peak on the right (photo cmr00980) to Kintla Peak on the left (photo cmr00977). 1911. Photos cmr00977, cmr00978, cmr00979, cmr00980 form a panorama. #1:/Glacier National Park/cmr00980 ID. Campbell, M.R. 980 Glacier National Park, Montana. From Heavens Peak on the right (photo cmr00980) to Kintla Peak on the left (photo cmr00977). 1911. Photos cmr00977, cmr00978, cmr00979, cmr00980 form a panorama. #1:/Glacier National Park/cmr00983 ID. Campbell, M.R. 983 Glacier National Park, Montana. Upper Two Medicine Valley, viewed from a point about 1,500 feet above the lake. Elkhorn Park and Pass on the right. 1911. #1:/Glacier National Park/cmr00986 ID. Campbell, M.R. 986 Glacier National Park, Montana. Part of Grinnell Glacier and Gould Mountain, viewed from the north end of Garden Wall. 1911. #1:/Glacier National Park/cmr00987 ID. Campbell, M.R. 987 Glacier National Park, Montana. Cutting a trail across Ahern Glacier. Large, unnamed glacier at the top. Cirque wall in the middle distance probably 3,000 feet high. 1911. #1:/Glacier National Park/cmr00988 ID. Campbell, M.R. 988 Glacier National Park, Montana. Head of the middle fork of the Belly River (Mokowanis River), viewed from the summit of Kipp Mountain. Mount Cleveland on the left (photo cmr00988). Mount Merritt on the right (photo cmr00990). 1911. Photos cmr00988, cmr00989, cmr00990 form a panorama. #1:/Glacier National Park/cmr00989 ID. Campbell, M.R. 989 Glacier National Park, Montana. Head of the middle fork of the Belly River (Mokowanis River), viewed from the summit of Kipp Mountain. Mount Cleveland on the left (photo cmr00988). Mount Merritt on the right (photo cmr00990). 1911. Photos cmr00988, cmr00989, cmr00990 form a panorama. #1:/Glacier National Park/cmr00990 ID. Campbell, M.R. 990 Glacier National Park, Montana. Head of the middle fork of the Belly River (Mokowanis River), viewed from the summit of Kipp Mountain. Mount Cleveland on the left (photo cmr00988). Mount Merritt on the right (photo cmr00990). 1911. Photos cmr00988, cmr00989, cmr00990 form a panorama. #1:/Glacier National Park/cmr00993 ID. Campbell, M.R. 993 Glacier National Park, Montana. Mount Merritt, viewed from a cleft in the summit wall of Kipp Mountain. 1911. #1:/Glacier National Park/cmr00994 ID. Campbell, M.R. 994 Glacier National Park, Montana. Shepard Glacier. 1911. #1:/Glacier National Park/cmr00999 ID. Campbell, M.R. 999 Glacier National Park, Montana. Packing outfit on a horse at the foot of Bowman Lake. 1911. #1:/Glacier National Park/cmr01000 ID. Campbell, M.R. 1000 Glacier National Park, Montana. Fording the outlet of Bowman Lake. Kintla Peak, white with snow, on the extreme left. 1911. Plate 11-B, U.S. Geological Survey Bulletin 600. #1:/Glacier National Park/cmr01005 ID. Campbell, M.R. 1005 Glacier National Park, Montana.J.R. Hoats on horseback at McDermott Lake in Swiftcurrent Valley. Circa 1910. Page 16 (upper right), Images of the U.S. Geological Survey, 1879-1979. #1:/Glacier National Park/cmr01007 ID. Campbell, M.R. 1007 Glacier National Park, Montana. Looking north at a small lake east of Vulture Peak. In this lake on the right is the heavy quartz ledge which gives its name to Quartz Creek and Quartz Lake. 1913. #1:/Glacier National Park/cmr01008 ID. Campbell, M.R. 1008 Glacier National Park, Montana. Survey camp at Kipps cabin on Flattop Mountain, looking north. Cathedral Peak in the distance. 1913. #1:/Glacier National Park/cmr01009 ID. Campbell, M.R. 1009 Glacier National Park, Montana. Burned timber on Flattop Mountain near Kipps cabin. 1913. #1:/Glacier National Park/cmr01010 ID. Campbell, M.R. 1010 Glacier National Park, Montana. Camp by a small lake east of Trapper Peak, Flattop Mountain, looking northeast. Cathedral Peak in the distance. 1913. #1:/Glacier National Park/cmr01011 ID. Campbell, M.R. 1011 Glacier National Park, Montana. Camp by a small lake east of Trapper Peak, Flattop Mountain, looking northeast. Cathedral Peak in the distance. 1913. Wide angle lens used. #1:/Glacier National Park/cmr01012 ID. Campbell, M.R. 1012 Glacier National Park, Montana. Camp at a small lake east of Trapper Peak, looking south. 1913. #1:/Glacier National Park/cmr01013 ID. Campbell, M.R. 1013 Glacier National Park, Montana. Vulture Peak, viewed from the north. 1913. #1:/Glacier National Park/cmr01014 ID. Campbell, M.R. 1014 Glacier National Park, Montana. Vulture Peak and Vulture Glacier(?) on its eastern side. 1913. #1:/Glacier National Park/cmr01015 ID. Campbell, M.R. 1015 Glacier National Park, Montana. Three glaciers on the east side of Vulture Peak, looking north. 1913. #1:/Glacier National Park/cmr01016 ID. Campbell, M.R. 1016 Glacier National Park, Montana. Vulture Glacier, viewed from the spur on its eastern side, looking west, 1913. #1:/Glacier National Park/cmr01017 ID. Campbell, M.R. 1017 Glacier National Park, Montana. Continental Divide at the head of Logging Creek. Vulture Peak just visible on the left. Below it is the south end of Two Ocean Glacier, which discharges to the right into the Hudson Bay drainage basin and to the left into streams that lead to the Pacific Ocean. Gyrfalcon Lake in the foreground. 1913. Plate 11-A, U.S. Geological Survey Bulletin 600. #1:/Glacier National Park/cmr01018 ID. Campbell, M.R. 1018 Glacier National Park, Montana. Head of Logging Creek. View is west, showing the long ridge of Vulture Glacier and Vulture Peak on the extreme right. Gyrfalcon Lake in the foreground. 1913. #1:/Glacier National Park/cmr01019 ID. Campbell, M.R. 1019 Glacier National Park, Montana. From the summit between Logging Creek and Little Kootenai Creek (Waterton River ), looking northeast down the latter valley. Mount Cleveland in the distance. 1913 #1:/Glacier National Park/cmr01020 ID. Campbell, M.R. 1020 Glacier National Park, Montana. West across the largest lake (Nahsukin Lake?) at the head of Little Kootenai Creek (Waterton River) in the cirque just below the summit. Red beds of Grinnell, showing what appears to an arch of the strata. 1913. #1:/Glacier National Park/cmr01022 ID. Campbell, M.R. 1022 Glacier National Park, Montana. Rainbow Glacier and Peak, viewed from the gap at the south end of Carter Glaciers, looking northwest. 1913. Wide angle lens used. Compare with photo cmr01023. #1:/Glacier National Park/cmr01023 ID. Campbell, M.R. 1023 Glacier National Park, Montana. Rainbow Glacier and Peak, viewed from the gap at the south end of Carter Glaciers, looking northwest. 1913. Narrow angle lens used. Compare with photo cmr01022. #1:/Glacier National Park/cmr01026 ID. Campbell, M.R. 1026 Glacier National Park, Montana. Carter Glaciers, viewed from the divide between the south fork and main fork of Valentine Creek. 1913. #1:/Glacier National Park/cmr01028 ID. Campbell, M.R. 1028 Glacier National Park, Montana. Porcupine Ridge, viewed from the mouth of Little Kootenai Creek (Waterton River) at the head of Waterton Lake. 1913. #1:/Glacier National Park/cmr01029 ID. Campbell, M.R. 1029 Glacier National Park, Montana. Up Olson Creek, viewed from the small lake (Lake Janet?) about 3 miles above Waterton Lake, looking west. 1913. #1:/Glacier National Park/cmr01033 ID. Campbell, M.R. 1033 Glacier National Park, Montana. Boulder Glacier, viewed from the spur south of Browns Pass, looking west. 1913. #1:/Glacier National Park/cmr01034 ID. Campbell, M.R. 1034 Glacier National Park, Montana. Castle Mountain reflected in Bowman Lake, viewed from the outlet in the evening. 1913. #1:/Glacier National Park/cmr01035 ID. Campbell, M.R. 1035 Glacier National Park, Montana. Heavens Peak, viewed from the dip slope on the opposite side of Camas Creek. 1913. #1:/Glacier National Park/cmr01038 ID. Campbell, M.R. 1038 Glacier National Park, Montana. Small lake (Camas Lake?) and Survey camp in the timber in the upper part of Camas Creek valley, looking south. 1913. #1:/Glacier National Park/cmr01040 ID. Campbell, M.R. 1040 Glacier National Park, Montana. Small lake (Camas Lake) in Camas Valley at the foot of Heavens Peak. At the head of the lake there are a good camp ground and a meadow that affords plenty of pasture for stock. 1913. Plate 9-B, U.S. Geological Survey Bulletin 600. #1:/Glacier National Park/cmr01045 ID. Campbell, M.R. 1045 Glacier National Park, Montana. Longfellow Peak, viewed from a ridge north of Heavens Peak. 1913. #1:/Glacier National Park/cmr01046 ID. Campbell, M.R. 1046 Glacier National Park, Montana. Difficulties of doing geologic work in burned second-growth timber and no trail. 1913. #1:/Glacier National Park/cmr01049 ID. Campbell, M.R. 1049 Glacier National Park, Montana. Hole-in-the-Wall Falls, viewed from the foot of the trail up Browns Pass. 1913. #1:/Glacier National Park/cmr01051 ID. Campbell, M.R. 1051 Glacier National Park, Montana. The Gateway (The Sentinel) north of Guardhouse Mountain, looking east. 1913. #1:/Glacier National Park/cmr01053 ID. Campbell, M.R. 1053 Glacier National Park, Montana. The Gateway (The Sentinel) and the lake, looking east. 1913. #1:/Glacier National Park/cmr01057 ID. Campbell, M.R. 1057 Glacier National Park, Montana. Falls just below the glacier at the head of Olson Creek, viewed from near camp. 1913. #1:/Glacier National Park/cmr01060 ID. Campbell, M.R. 1060 Glacier National Park, Montana. Part of Waterton Lake, looking south from near the international boundary. Mount Cleveland on the left. 1913. #1:/Glacier National Park/cmr01069 ID. Campbell, M.R. 1069 Glacier National Park, Montana. South Carter Glacier, showing moraines. 1913. #1:/Glacier National Park/cmr01073 ID. Campbell, M.R. 1073 Glacier National Park, Montana. Small lake (Nahsukin Lake?) at the head of Little Kootenai Creek (Waterton River), viewed from the summit, looking down creek to the northeast. 1913. #1:/Glacier National Park/cmr01075 ID. Campbell, M.R. 1075 Glacier National Park, Montana. Glacial grooves and striae on rocks east of Vulture Peak. 1913. #1:/Campbell M.R. Collection-Moffat Coal Company/cmr01208 ID. Campbell, M.R. 1208 Moffat Coal Company Tipple looking down Oak Creek, to the north. Routt County, Colorado. 1919. #1:/Campbell M.R. Collection-Juniper Coal Company/cmr01209 ID. Campbell, M.R. 1209 Abandoned mine of the Juniper Coal Co. in N.E. 1/4, Sec. 30, T. 4 N., R.85W.,looking west. Mine was on bed No.1. An opening on Bed No. 2, 180 ft. above bed No. 1 is shown on the left. Routt County, Colorado. 1919. #1:/Campbell M.R. Collection-Curtis Coal Mine/cmr01211 ID. Campbell, M.R. 1211 Panorama with photo 1212 showing mines on Elk Creek. The mine on the right is the Curtis Coal Mine and the coal bed worked is the Brooks, or upper most bed in the lower group. The mines showing in photo 1212 are on the Wolf Creek Bed, the lower most bed of the middle group. Routt County, Colorado. 1919. #1:/Campbell M.R. Collection-Curtis Coal Mine/cmr01212 ID. Campbell, M.R. 1212 Panorama with photo 1211 showing mines on Elk Creek. The mine on the right is the Curtis Coal Mine and the coal bed worked is the Brooks, or uppermost bed in the lower group. The mines showing in No. 1212 are on the Wolf Creek Bed, the lowermost bed of the middle group. Routt County, Colorado. 1919. #1:/Campbell M.R. Collection-Curtis Coal Mine/cmr01232 ID. Campbell, M.R. 1232 Mine of Curtis Coal Company in Elk Creek Valley, Brooks Coal Bed in lower group of coal beds in Mesa Verde formation. Coal bed overlies massive white sandstone. Routt County, Colorado. 1919. #1:/Harpers Ferry National Historic Park/cmr01407 ID. Campbell, M.R. 1407 Harpers Ferry National Historic Park, West Virginia. The Potomac River and Baltimore and Ohio railroad bridge, viewed from the hill in back of the station. 1923. #1:/Harpers Ferry National Historic Park/cmr01408 ID. Campbell, M.R. 1408 Harpers Ferry National Historic Park, West Virginia. From Charleston Road on the outskirts of Harpers Ferry, looking northwest at 510 feet altitude. 1923. Photos cmr01408, cmr01409, and cmr01410 form a panorama. #1:/Harpers Ferry National Historic Park/cmr01409 ID. Campbell, M.R. 1409 Harpers Ferry National Historic Park, West Virginia. From Charleston Road on the outskirts of Harpers Ferry, looking northwest at 510 feet altitude. 1923. Photos cmr01408, cmr01409, and cmr01410 form a panorama. #1:/Harpers Ferry National Historic Park/cmr01410 ID. Campbell, M.R. 1410 Harpers Ferry National Historic Park, West Virginia. From Charleston Road on the outskirts of Harpers Ferry, looking northwest at 510 feet altitude. 1923. Photos cmr01408, cmr01409, and cmr01410 form a panorama. #1:/Harpers Ferry National Historic Park/cmr01438 ID. Campbell, M.R. 1438 Harpers Ferry National Historic Park, West Virginia. The gap at Harpers Ferry, viewed from Charlestown Pike 1 mile west of town. June 26, 1924. Photos cmr01438 and cmr01439 form a panorama. #1:/Harpers Ferry National Historic Park/cmr01439 ID. Campbell, M.R. 1439 Harpers Ferry National Historic Park, West Virginia. The gap at Harpers Ferry, viewed from Charlestown Pike 1 mile west of town. June 26, 1924. Photos cmr01438 and cmr01439 form a panorama. #1:/Harpers Ferry National Historic Park/cmr01440 ID. Campbell, M.R. 1440 Harpers Ferry National Historic Park, West Virginia. The Potomac River, viewed from the wagon bridge cross the Shenandoah River at Harpers Ferry. June 26, 1924. #1:/Harpers Ferry National Historic Park/cmr01441 ID. Campbell, M.R. 1441 Harpers Ferry National Historic Park, West Virginia. The Potomac River, viewed from the highway bridge across the Baltimore and Ohio railway near Harpers Ferry. June 26, 1924. #1:/Campbell M.R. Collection-Hayden Coal Mine/cmr01578 ID. Campbell, M.R. 1578 Tipple of Hayden Coal mine at Haybro on the Denver and Salt Lake Railroad in SE Sec. 18, T. 4 N., R. 85 W. Routt County, Colorado. n.d. #1:/Campbell M.R. Collection-Pinnacle Coal Mine/cmr01580 ID. Campbell, M.R. 1580 Pinnacle Coal Mine of the Victor American Fuel Co. in S.E. 1/4, Sec. 36, T. 4N., R. 86 W. Snow Sheds cover most of the railroad. Routt County, Colorado. 1919. #1:/Campbell M.R. Collection-Glacier National Park and Preserve/cmr0994r ID. Campbell, M.R. 994r Shepard Glacier. Glacier National Park and Preserve. Glacier County, Montana. 1911. #1:/Campbell M.R. Collection-Curtis Coal Mine/cmr1231a ID. Campbell, M.R. 1231a Coal mines in Elk Creek Valley. Coal bed in middle group of coal beds in Mesa Verde formation. Routt County, Colorado. 1919. #1:/Grand Canyon National Park/cnw00009 ID. Carkhuff, N.W. 9 Grand Canyon National Park, Arizona. The Esplanade, northwestward through the Grand Canyon from Havasupai Point. Ives Point on the right skyline. Mount Trumbull on the extreme left skyline. Darwin Terrace at left middle ground at the base of Mount Huethawali. Then Spencer Terrace and Huxley Terrace. Grand Canyon Scenic Divide and Bass Canyon on the lower right. 1901. Plate 6, U.S. Geological Survey Bulletin 549. #1:/Grand Canyon National Park/cnw0000c ID. Carkhuff, N.W. c Grand Canyon National Park, Arizona. Grand Canyon of the Colorado River, viewed east from Grandview Point. 1901. Portion of page 2, Images of the U.S. Geological Survey, 1879-1979. #1:/Grand Canyon National Park/cnw00014 ID. Carkhuff, N.W. 14 Grand Canyon National Park, Arizona. Near Shinumo Creek and Bass Canyon. 1901. #1:/Grand Canyon National Park/cnw00040 ID. Carkhuff, N.W. 40 Grand Canyon National Park, Arizona. Geologic history of the Shinumo Quadrangle as revealed by the lithologic record in the canyon wall. Powell Plateau across the skyline. Colorado River at bottom center. A vertical mile of strata is in view. 1901. Plate 18, U.S. Geological Survey Bulletin 549. #1:/Grand Canyon National Park/cnw00047 ID. Carkhuff, N.W. 47 Grand Canyon National Park, Arizona. Profile from the summit of Scenic Plateau in Aubry red shale to Tonto sandstone. 1901. #1:/Grand Canyon National Park/cnw00068 ID. Carkhuff, N.W. 68 Grand Canyon National Park, Arizona. Dox Sandstone in the canyon of Shinumo Creek, overlain unconformably by Tapeats Sandstone of the Tonto Group. Masonic Temple in the left background. 1901. Plate 13-B, U.S. Geological Survey Bulletin 549. #1:/Grand Canyon National Park/cnw00069 ID. Carkhuff, N.W. 69 Grand Canyon National Park, Arizona. Dox Sandstone, viewed from the base of Powell Plateau, looking south-southeast. 1901. #1:/Grand Canyon National Park/cnw00070 ID. Carkhuff, N.W. 70 Grand Canyon National Park, Arizona. Shinumo Canyon above Blue Dick Mine. October 17, 1901. Photos cnw00070 and cnw00071 form a panorama. #1:/Grand Canyon National Park/cnw00071 ID. Carkhuff, N.W. 71 Grand Canyon National Park, Arizona. Shinumo Canyon above Blue Dick Mine. October 17, 1901. Photos cnw00070 and cnw00071 form a panorama. #1:/Grand Canyon National Park/cnw00083 ID. Carkhuff, N.W. 83 Grand Canyon National Park, Arizona. Wheeler fold, viewed from the bed of Bass Canyon. October 18, 1901. Plate 17-A, U.S. Geological Survey Bulletin 549. #1:/Grand Canyon National Park/cnw00084 ID. Carkhuff, N.W. 84 Grand Canyon National Park, Arizona. Faulting in strata of the Unkar wedge in Burro Canyon. 1901. Plate 17-B, U.S. Geological Survey Bulletin 549. #1:/Grand Canyon National Park/cnw00095 ID. Carkhuff, N.W. 95 Grand Canyon National Park, Arizona. West through the Kaibab Section. Kaibab Plateau on the right. Coconino Plateau on the left. Distance from rim to rim is about 10 miles. In the center, the Colorado River in the Granite Gorge, trenched 1,200 feet below the Tonto Platform. In the lower right corner is the apex of the great wedge of inclined Algonkian strata (Grand Canyon series) intercalcated between the crumpled Archean rocks of the Granite Gorge and flat Cambrian rocks of the Tonto Platform. 1901. #1:/Grand Canyon National Park/cnw00113 ID. Carkhuff, N.W. 113 Grand Canyon National Park, Arizona. Dutton Point in the center background. Muav Saddle on the right, viewed from Tonto Terrace, looking up river. 1901. #1:/Grand Canyon National Park/cnw00114 ID. Carkhuff, N.W. 114 Grand Canyon National Park, Arizona. Tonto Platform eastward up Kaibab division of the Grand Canyon from the level of the Esplanade directly under Havasupai Point. 1901. Plate 5, U.S. Geological Survey Bulletin 549. #1:/Grand Canyon National Park/cnw00131 ID. Carkhuff, N.W. 131 Grand Canyon National Park, Arizona. Down the canyon, viewed from a few miles south of E1 Tovar. Vishnu Shrine and Sheba Temple. 1901. #1:/ Arizona-Grand Canyon National Park/cnw00132 ID. Carkhuff, N.W. 132 Grand Canyon National Park, Arizona. Northeastward across the Grand Canyon from Zuni Point, east of Grandview Point. The lower slopes are red shales, limestones, sandstones, and lava of the Unkar group, dipping east and overlain unconformably by Tonto sandstone shales of Tonto group. Painted desert in the distance. 1900. Plate 31 in U.S. Geological Survey. Bulletin 613. 1916. #1:/Grand Canyon National Park/cnw00133 ID. Carkhuff, N.W. 133 Grand Canyon National Park, Arizona. Grand Canyon, northeast from Zuni Point across the great bend at the head of the Kaibab section. On the left, the Walhalla Plateau (a promontory of the Kaibab Plateau), terminating eastward in Cape Final. In right background, the Painted Desert, fronted by the Palisade of the Desert. The breach made by the canyon of the Little Colorado may be discerned 1.5 inches from the right border. Throughout the middle distance, the flat-lying Paleozoic rocks are seen resting unconformably upon the inclined Algonkian rocks (viewed almost at right angles to the strike) which have been uncovered over a large area and give rise to subdued forms. 1901. #1:/Grand Canyon National Park/cnw00134 ID. Carkhuff, N.W. 134 Grand Canyon National Park, Arizona. Northward across the Grand Canyon from the end of Grand Scenic Divide. Dutton Point on the left skyline, then Muav Saddle. Shinumo Amphitheatre on the right skyline. Muav Canyon at upper left center. Dox Castle at the right of center. Granite Gorge near right bottom. October 24, 1901. Plate 11, U.S. Geological Survey Bulletin 549. #1:/Grand Canyon National Park/cnw00135 ID. Carkhuff, N.W. 135 Grand Canyon National Park, Arizona. Cape Final at left center. Unkar and Unkar Creek at lower right. October 21, 1901. #1:/Grand Canyon National Park/cnw00139 ID. Carkhuff, N.W. 139 Grand Canyon National Park, Arizona. Zoraster and Brahma. Head of Hance Trail, looking northwest. October 25, 1901. #1:/Grand Canyon National Park/cnw00141 ID. Carkhuff, N.W. 141 Grand Canyon National Park, Arizona. Coronado Butte. 1901. #1:/Grand Canyon National Park/cnw00145 ID. Carkhuff, N.W. 145 Grand Canyon National Park, Arizona. Grand Canyon of the Colorado. 1901. Plate 29-A, U.S. Geological Survey Professional Paper 60. #1:/Grand Canyon National Park/cnw00146 ID. Carkhuff, N.W. 146 Grand Canyon National Park, Arizona. Grand Canyon, viewed from the south rim at Grandview Point, 10 miles east of the El Tovar Hotel. The width of the canyon is 9 miles. 1901. Plate 21-B, U.S. Geological Survey Water-Supply Paper 556. #1:/Grand Canyon National Park/cnw00147 ID. Carkhuff, N.W. 147 Grand Canyon National Park, Arizona. Solomons Temple at right center; Cape Final at top left, viewed from Grandview. 1901. #1:/Grand Canyon National Park/cnw00152 ID. Carkhuff, N.W. 152 Grand Canyon National Park, Arizona. Granite Gorge of the Grand Canyon of the Colorado, looking northwest. Isis and Shiva Temples in the middle background. Zoraster Temple in the right background. 1901. Plate 29-P, U.S. Geological Survey Professional Paper 60; Plate 19, U.S. Geological Survey Professional Paper 98. #1:/Grand Canyon National Park/cnw00165 ID. Carkhuff, N.W. 165 Grand Canyon National Park, Arizona. Strata of the Unkar Group near the mouth of Bright Angel Creek, viewed from Hopi Point, looking down river. October 30, 1901. Plate 10-B, U.S. Geological Survey Bulletin 549. #1:/Grand Canyon National Park/cnw00166 ID. Carkhuff, N.W. 166 Grand Canyon National Park, Arizona. Looking north across the park. October 30, 1901. #1:/Grand Canyon National Park/cnw0040a ID. Carkhuff, N.W. 40a Grand Canyon National Park, Arizona. Grand Canyon of the Colorado River. K - Kaibab Limestone, Permian age to Toroweap Formation, Permian age; C - Coconino Sandstone, Permian age; He - Hermit Shale, Permian age; R - Redwall Limestone, Mississippian age; S-P - Supai Formation, Permain age; S-P - Supai Formation, Pennsylvanian age; D - Dox Sandstone, Lake Precambrian age; M - Muav Limestone, Cambrian Age; BA - Bright Angel Shale, Cambrian age; Ta - Tapeats Sandstone, Cambrian age; So - Shinumo Quartzite, Lake Precambrian age; Ha - Hakatai Shale, Late Precambrian age; B - Bass Limestone, Late Precambrian age. 1901. #1:/Grand Canyon National Park/cnw0062a ID. Carkhuff, N.W. 62a Grand Canyon National Park, Arizona. The Colorado River flows from right to left up Shinumo Creek, 174.7 kilometers below Lees Ferry. Photograph was taken from the opposite bank and shows horizontal water stains on the cliffs to the left of the canyon mouth. The deposit of sand and boulders at the mouth of Shinumo Creek is not occupied by plants. Altitude is 666 meters. 1901. Figure 52-A, U.S. Geological Survey Professional Paper 1132. #1:/Greenland/crb00051 ID. Colton, R.B. 51ct Greenland. Solifluction lobes northwest of Lake Camp. August 1953. #1:/Greenland/crb00067 ID. Colton, R.B. 67ct Greenland. Solifluction lobes on the side of a kame 1 mile east of Beach Camp, northeast of Thule Air Force Base. August 1953. #1:/Greenland/crb00252 ID. Colton, R.B. 252ct Greenland. Iceberg in Wohlstenholme Fjord, northeast of Thule Air Force Base. June 1953. #1:/Greenland/crb00256 ID. Colton, R.B. 256ct Greenland. Iceberg in Wohlstenholme Fjord, northeast of Thule Air Force Base. August 1953. #1:/Greenland/crb00257 ID. Colton, R.B. 257ct Greenland. Iceberg in Wohlstenholme Fjord, northeast of Thule Air force Base. Dike Mountain in the background. August 19, 1953. #1:/Greenland/crb00278 ID. Colton, R.B. 278ct Greenland. Kames in Happy Valley. August 8, 1953. #1:/Glacier National Park/crh00008 ID. Chapman, R.H. 8 Glacier National Park, Montana. Siyeh Limestone boulders at camp east of Vulture Peak. 1901. #1:/Glacier National Park/crh00011 ID. Chapman, R.H. 11 Glacier National Park, Montana. Overturned Grinnell Argillite on McPartland Mountain, viewed from the northwest. 1901. Figure 28, U.S. Geological Survey Professional Paper 296. #1:/Glacier National Park/crh00013 ID. Chapman, R.H. 13 Glacier National Park, Montana. Peaks and glacier at the head of Quartz Creek, viewed from the shelf east of Vulture Peak. North end of Rainbow Glacier in the distance. 1901. #1:/Glacier National Park/crh00122 ID. Chapman, R.H. 122 Glacier National Park, Montana. Azimuth station at Waterton Lake post on the United States boundary. 1901. #1:/Glacier National Park/crh00124 ID. Chapman, R.H. 124 Glacier National Park, Montana. Survey pack train crossing a snow bank on Swiftcurrent Trail. 1901. Plate 5-B, U.S. Geological Survey Bulletin 600. #1:/Glacier National Park/crh00127 ID. Chapman, R.H. 127 Glacier National Park, Montana. Cloud-capped Mount Wilber, viewed from Swiftcurrent Valley near Altyn. 1901. #1:/Glacier National Park/crh00136 ID. Chapman, R.H. 136 Glacier National Park, Montana.U.S. Geological Survey pack train fording the North Fork Flathead River. 1901. #1:/Glacier National Park/crh00138 ID. Chapman, R.H. 138 Glacier National Park, Montana. Northeast up Bowman Gorge, viewed from Bowman Lake outlet. Rainbow Peak is the highest peak, just to the right of center. 1901. #1:/Glacier National Park/crh00139 ID. Chapman, R.H. 139 Glacier National Park, Montana. Rainbow Peak and Glacier, looking west from ridges east of Quartz Creek. 1901. #1:/Glacier National Park/crh00144 ID. Chapman, R.H. 144 Glacier National Park, Montana. Gorge of Quartz Creek, hanging valleys, small portion of upper Quartz Lake. 1901. #1:/Glacier National Park/crh00164 ID. Chapman, R.H. 164 Glacier National Park, Montana. Up Quartz Lake from outlet. 1901. #1:/Glacier National Park/crh00207 ID. Chapman, R.H. 207 Glacier National Park, Montana. Avalanche basin. 1901. #1:/Alaska/crm00003 ID. Chapman, R.M. 3ct Alaska. Siltstone in silt/shale section zone B_C on the Kukpowruk River. June 1949. #1:/Alaska/crm00031 ID. Chapman, R.M. 31ct Alaska. Muck bluff and ice wedges on the Kokolik River. August 20, 1949. #1:/Chapman R.M. Collection-Alaska glAciers/crm00328 ID. Chapman, R.M. 328 Form a panorama, north up Maclaren Glacier from near mouth of Discovery Creek. Mt. Hayes quadrangle. Valdez Creek district, Cook Inlet region, Alaska. August 12, 1953. #1:/Chapman R.M. Collection-Alaska glAciers/crm00329 ID. Chapman, R.M. 329 Form a panorama, north up Maclaren Glacier from near mouth of Discovery Creek. Mt. Hayes quadrangle. Valdez Creek district, Cook Inlet region, Alaska. August 12, 1953. #1:/Chapman R.M. Collection-Alaska glAciers/crm00330 ID. Chapman, R.M. 330 Form a panorama, north up Maclaren Glacier from near mouth of Discovery Creek. Mt. Hayes quadrangle. Valdez Creek district, Cook Inlet region, Alaska. August 12, 1953. #1:/Chapman R.M. Collection-Alaska glAciers/crm00331 ID. Chapman, R.M. 331 Form a panorama, north up Maclaren Glacier from near mouth of Discovery Creek. Mt. Hayes quadrangle. Valdez Creek district, Cook Inlet region, Alaska. August 12, 1953. #1:/Hawaii Volcanoes National Park/cro00649 ID. Cross, C.W. 649 Hawaii Volcanoes National Park. Crater of Kilauea. Lava forms on the floor of the crater, near the trail from Volcano House to Halemaumau Crater. The lava is typical pahoehoe. The smooth spot represents part of an earlier floor. 1902. #1:/Hawaii Volcanoes National Park/cro00657 ID. Cross, C.W. 657 Hawaii Volcanoes National Park. Shelter hut on the verge of the pit of Halemaumau Crater. 1902. #1:/Mount Pinatubo, Philippines, June 1991/ctj00005 ID. Casadevall, T.J. 5ct Mount Pinatubo, Philippines, June 1991. First major eruption of Mount Pinatubo, viewed from Clark Air Force Base. Photo by R.S. Culbreth, U.S. Air Force, June 12, 1991. #1:/Mount Pinatubo, Philippines, June 1991/ctj00006 ID. Casadevall, T.J. 6ct Mount Pinatubo, Philippines, June 1991. First major eruption of Mount Pinatubo, viewed from Clark Air Force Base. Photo by Karin Jackson, U.S. Air Force, June 12, 1991. #1:/Mount Pinatubo, Philippines, June 1991/ctj00022 ID. Casadevall, T.J. 22ct Mount Pinatubo, Philippines, June 1991. Flooding in Santa Rita de Concepcion. Main flow of the Bamban River has migrated from its channel to cause extensive flooding in villages downstream from Mount Pinatubo. July 23, 1991. #1:/Mount St. Helens*msh/cvoa0001 ID. CVO-A. 1ct Oblique aerial view of Mount St. Helens prior to the eruption. It is nearly a symmetrical cone-shaped volcano in the Cascade Range. Elevation 9,471 feet. View looking westerly across the north face of the volcano as we see the Goat Rocks feature on the north flank and the Dogs Head feature on the northwest flank. In center foreground is Shoestring Glacier and in the upper right hand corner is the North Fork Toutle River valley. Skamania County, Washington. n.d. #1:/Post A.S. Collection-Mount St. Helens*msh198005b/cvoa0003 ID. CVO-A. 3ct Looking south from timberline at the bulge. Immediately preceding the eruption of May 18, 1980, the bulge was growing at a rate of five feet per day. Helicopter at right. Skamania County, Washington. April 13, 1980. (Photo by Austin Post, Glaciology) #1:/Post A.S. Collection-Mount St. Helens*msh198005m/cvoa0004 ID. CVO-A. 4ct Oblique aerial view of the eruption of May 18, 1980, which sent volcanic ash, steam, water, and debris to a height of 60,000 feet. The mountain lost 1300 feet of altitude and about 2/3-cubic mile of material. Note the material streaming downward from the center of the plume and the formation and movement of pyroclastic flows down the left flank of the volcano. Photo by Austin Post. Skamania County, Washington. May 18, 1980. #1:/Mount St. Helens*msh1980/cvoa0006 ID. CVO-A. 6ct 1:100,000 metric map showing areas impacted by mudflows from the Mount St. Helens eruption (blue), 6 miles of the North Fork Toutle River valley covered by blast deposits (purple), 150 square miles devastated by the blast (red cross-hatch), area where trees were singed (yellow), and Cowlitz River valley which was inundated by the mudflow. Skamania and Cowlitz Counties, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0007 ID. CVO-A. 7ct Oblique aerial view showing mudflow sequence occurring on the southeast flank of the volca In the center is the Muddy River drainage basin and in the right center of the view is the canyon through which the Muddy River plunged downward to subsequently flow into the Swift Reservoir. The mudflow deposit is approximately 2 miles across and shows the mudflow flowing across the drainage divide in the East Fork Pine Creek drainage basin. On the left is the Pine Creek drainage with the mudflow ending about mid-slide where a portion of the Muddy River mudflow again crossed the divide. Note how the mudflow followed topography and shows super-elevations on the outside of bends. Skamania County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0010 ID. CVO-A. 10ct Shortly after the eruption water was flowing through the mudflow and entering the stream at the canyon as a spring. This water is clear and cold. You notice the stratigraphy of the mudflow and debris deposited throughout. Man for scale. Skamania County, Washington. 1980. #1:/Mount St. Helens*msh198005m/cvoa0011 ID. CVO-A. 11ct Looking upstream at the Smith Creek drainage basin. Smith Creek, a tributary to Muddy River, was inundated by several feet of mud, and phreatic eruptions can be seen occurring through the mudflow. Note the trees stripped from the hills and fires burning on the hills; also the deposit of trees on and through the mudflow. On the left of the slide you can see water beginning to flow over the surface of the newly deposited mudflow. Skamania County, Washington. May 19, 1980. #1:/Mount St. Helens*msh1980/cvoa0013 ID. CVO-A. 13ct Closer view of rock in Muddy River. The diameter of the rock is approximately 30 feet. This rock was carried downstream during the May 18, 1980, mudflow, and deposited on cut logs located in the riverbed. Geologist for scale. Skamania County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0014 ID. CVO-A. 14ct View taken approximately 3 miles upstream from the mouth of Pine Creek shows the layer of mud deposited on the over banks and the subsequent cutting of the channel through the mudflow and parent material. On the right one can see the elevation of the mudline rapidly increasing when moving only a few feet upstream. Helicopter is located in the center of a 90-degree bend and several tens of feet of super-elevation were noted as the mudflow rounded this bend. An indirect measurement of discharge was attempted downstream from this site, but standing waves, super-elevation, and other flow characteristics of the mudflow events precluded solution of its volume without using energy concepts. Skamania County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0015 ID. CVO-A. 15ct View taken on outside of bend seen in photo 14ct. Located in center is a pyramid-shaped deposit of mud, characteristically deposited on the outside of bends. On the far right hand side of the slide can be seen the mudflow being pushed up a logging road several hundred feet beyond the visual limit of this slide. Skamania County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0016 ID. CVO-A. 16ct Looking downstream at the mouth of Pine Creek where it enters the Lewis River. One can see the deposition of mud on May 19, 1980, the abutments of the bridge, and the subsequent cutting of the new channel. Skamania County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0017 ID. CVO-A. 17ct Oblique aerial view of the remaining abutment on the right side of Pine Creek channel near is mouth. Note the mud pushed at 90 degrees to the direction of flow and the two large rocks deposited on the roadway. Skamania County, Washington. 1980. #1:/Adsit R.R. Collection-Mount St. Helens*msh1980/cvoa0018 ID. CVO-A. 18ct Nearer view of two large rocks deposited on roadway of remaining abutment on right side of Pine Creek channel near its mouth. This suggests that these large rocks were riding very high in the mudflow and were pushed laterally and deposited away from the mudflow. Geologists for scale. Photo by R.R. Adsit. Skamania County, Washington. 1980. #1:/Mount St. Helens*msh198005m/cvoa0019 ID. CVO-A. 19ct Oblique aerial view of Swift Reservoir. Notice the mud and rocks deposited in the reservoir, and that the water at this point in time is still relatively clear. On the left bank (background) of the reservoir one can see several vacation-type homes which barely escaped the mudflows entering the reservoir. Skamania County, Washington. May 19, 1980. Figure 33 in U.S. Geological Survey Professional Paper 1249. 1982. #1:/Mount St. Helens*msh1980/cvoa0020 ID. CVO-A. 20ct Oblique aerial view of upper end of Swift Reservoir, after the reservoir had been drawn down several weeks later. Note that the mudflow was pushed several hundred feet downstream from the view on photo 19ct. Skamania County, Washington. 1980. #1:/Mount St. Helens*msh198005m/cvoa0021 ID. CVO-A. 21ct Oblique aerial view looking six miles upstream of the South Fork Toutle River, west of Mount St. Helens. Note the trees completely stripped from the side hills, fires burning, and the mud deposited in the valley. Note also a well defined gully system had been developed immediately following the mudflow. Cowlitz County, Washington. May 19, 1980. #1:/Mount St. Helens*msh1980/cvoa0022 ID. CVO-A. 22ct Oblique aerial view showing Mount St. Helens and South Fork Toutle River mudflow after the May 25, 1980, ash eruption. Note the large gully in the upper center of the photo. Skamania and Cowlitz Counties, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0023 ID. CVO-A. 23ct Oblique aerial view of gully system in South Fork Toutle River mudflow, west of Mount St. Helens, showing the erosion that occurred as a result of the mudflow, and the scour marks on the side of the gully. For scale, the eroded portion of the gully is approximately 300 feet across and 300 feet deep. Cowlitz County, Washington. 1980. #1:/Mount St. Helens*msh198005m/cvoa0024 ID. CVO-A. 24ct Oblique aerial view looking downstream at the South Fork Toutle River, west of Mount St. Helens. Note the large deposits of mud for some 30 miles downstream, and the two different colors of mud, indicating that there were two mudflow events on this fork of the river. In the center of the view is an area where an indirect measurement of discharge was attempted. Large standing waves with wavelengths of 200 to 400 feet and amplitudes of 30 feet were found in this area. Note the deposits of mud and the over banks in the foreground of the view how the mudflow followed the topography throughout the course of the river. Cowlitz County, Washington. May 19, 1980. #1:/Mount St. Helens*msh1980/cvoa0025 ID. CVO-A. 25ct View farther downstream on the South Fork Toutle River, west of Mount St. Helens, and looking at the flow characteristic of the sandbed stream. Note the standing wave of mud on the left bank of the stream. Geologist for scale. Cowlitz County, Washington. 1980. #1:/Mount St. Helens*msh198005m/cvoa0026 ID. CVO-A. 26ct Oblique aerial view at a logging camp near the mouth of the South Fork Toutle River showing the devastation caused by Mount St. Helens. Cowlitz County, Washington. May 19, 1980. #1:/Mount St. Helens*msh198005m/cvoa0027 ID. CVO-A. 27ct Oblique aerial view of devastation caused by Mount St. Helens at logging camp on the South Fork Toutle River near its mouth, showing logs, overturned trucks and caterpillars. Cowlitz County, Washington. May 19, 1980. Figure 31-B, U.S. Geological Survey Professional Paper 1249. #1:/Mount St. Helens*msh1980/cvoa0029 ID. CVO-A. 29ct South Fork Toutle River, west of Mount St. Helens. The railroad bridge was washed away leaving the rail hanging. Cowlitz County, Washington. 1980. #1:/Glicken H.C. Collection-Mount St. Helens*msh198005m/cvoa0033 ID. CVO-A. 33ct The mudflow beginning to move downstream from the blast material deposited in the North Fork Toutle valley. This mudflow took nine hours to build in size sufficient to reach through the blasted material and move downstream to the Cowlitz River valley. The mudflow on the South Fork Toutle River arrived at Castle Rock three hours after the eruption of Mount St. Helens and that from the North Fork by 12 hours. Photo by Harry Glicken. Cowlitz County, Washington. May 18, 1980. #1:/Mount St. Helens*msh198005m/cvoa0035 ID. CVO-A. 35ct Oblique aerial view of the laterally blasted material deposited in the North Fork Toutle River valley approximately seven miles away from Mount St. Helens. Note the dense ash in the air, the ash-covered blast deposits, and the brown mudflow deposits. Cowlitz County, Washington. May 19, 1980. #1:/Mount St. Helens*msh198005m/cvoa0036 ID. CVO-A. 36ct Oblique aerial view of North Fork Toutle River valley, north of Mount St. Helens. Note topography of the blast material, large gullies cut by the subsequent mudflows, deposits of mud splashed on the hummocks of the blast material, and subsequent slumping of material into the gullies, creating natural barriers to flow. Cowlitz County, Washington. May 19, 1980. #1:/Mount St. Helens*msh198005e/cvoa0037 ID. CVO-A. 37ct View taken after the May 25, 1980, eruption of Mount St. Helens, showing the remaining gully system on the left side of the North Fork Toutle valley with thickness of avalanche material ranging from 100 feet in the foreground to 150 feet in the upper portion of the view. This shot is taken approximately one mile downstream from Elk Rock, and at a subsequent location of a USGS gaging station. Cowlitz County, Washington. 1980. #1:/McGavock E.H. Collection-Mount St. Helens*msh198008/cvoa0038 ID. CVO-A. 38ct Mount St. Helens avalanche material to a depth of 100 feet on the right and the parent material on the left. Helicopter in center of view for scale. Photo by E.H. McGavock. Cowlitz County, Washington. August 11, 1980. #1:/Mount St. Helens*msh1980/cvoa0039 ID. CVO-A. 39ct Oblique aerial view of mudflow deposits at Camp Baker, a logging camp located about 17 miles downstream in the North Fork Toutle River valley, northwest of Mount St. Helens. Note the fully loaded logging train at the right of the picture and the overturned logging equipment. Cowlitz County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0040 ID. CVO-A. 40ct Oblique aerial view of bridge displaced in the North Fork Toutle River valley, north of Mount St. Helens. Note the battering of the superstructure by logs and rocks from the mudflow. Cowlitz County, Washington. 1980. Figure 31-D, U.S. Geological Survey Professional Paper 1249. #1:/Mount St. Helens*msh1980/cvoa0041 ID. CVO-A. 41ct Oblique aerial view looking upstream at former location of bridge displaced in the North Fork Toutle River valley, north of Mount St. Helens. Note the mud deposits on the over banks, especially those on the left moving upstream on the road. Cowlitz County, Washington. 1980. Figure 31-C, U.S. Geological Survey Professional Paper 1249. #1:/Mount St. Helens*msh1980/cvoa0042 ID. CVO-A. 42ct Oblique aerial view of the devastation at the Green River Fish Hatchery, located near Kid Valley, northwest of Mount St. Helens. Cowlitz County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0043 ID. CVO-A. 43ct Oblique aerial view of the mudflow downstream from Kid Valley, northwest of Mount St. Helens. Note the four boxcars displaced from the rail running along the left bank of the river. Cowlitz County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0044 ID. CVO-A. 44ct Flow material which carried houses during the mudflow events following eruptions of Mount St. Helens. It was plastered along nearly vertical banks of the river and displayed characteristics of concrete breaking up with a blow of a hammer and readily absorbing water being poured onto it. Note how it follows the topography, and it was pushed like a wet slurry of concrete. Cowlitz County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0046 ID. CVO-A. 46ct Trees bent over by the mudflow were pointed downstream and were planed by the ash to near flat boards. Mount St. Helens, Cowlitz County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0047 ID. CVO-A. 47ct Trees bent in the downstream direction were all sanded off to sharp needle points. Mount St. Helens, Cowlitz County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0048 ID. CVO-A. 48ct Geologist holding one of those needle points at end of tree. Note large fall in elevation as the mudflow moved downstream in background. Mount St. Helens, Cowlitz County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0049 ID. CVO-A. 49ct This gaging station located one mile below the junction of the North and South Forks Toutle River, northwest of Mount St. Helens, was completely wiped out by the May 18, 1980, mudflow. A five-inch concrete reinforced gage well was sheared off at the ground, leaving the re-rod bent in the downstream direction and completely stripped of concrete. A staff gage found inside of the well had an upper elevation of 17 feet. The elevation at the top of the mudflow was 53 feet. Cowlitz County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0053 ID. CVO-A. 53ct Oblique aerial view of mud deposited in the North Fork Toutle River valley, northwest of Mount St. Helens, which rose to an elevation of only 15 feet below the Interstate 5 bridge, near center of view. Note mud being pushed upstream (to the right) on the Cowlitz River. Cowlitz County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0054 ID. CVO-A. 54ct Oblique aerial view looking downstream on the Cowlitz River, north of Mount St. Helens. Mud deposits on the over banks ranging in depth to 15 feet. Cowlitz County, Washington. 1980. #1:/Topinka L. Collection-Mount St. Helens*msh198007/cvoa0055 ID. CVO-A. 55ct Mud deposits on the overbank of the Cowlitz River, north of Mount St. Helens. Driveway dug out to house in background. (Photo by Lyn Topinka. Cowlitz County, Washington. July 1980. #1:/Mount St. Helens*msh198005/cvoa0060 ID. CVO-A. 60ct Oblique aerial view across Spirit Lake toward Mount St. Helens, one week after the eruption. Low cloud cover. Skamania County, Washington. May 1980. #1:/Mount St. Helens*msh198005/cvoa0061 ID. CVO-A. 61ct Oblique aerial view looking into the crater one week after the eruption of Mount St. Helens. Notice the low cloud deck and steam rising from the crater. Skamania County, Washington. May 1980. #1:/Mount St. Helens*msh1980/cvoa0063 ID. CVO-A. 63ct Oblique aerial view across Spirit Lake after the eruption of Mount St. Helens; secondary steam fumaroles in blast area in foreground. Skamania County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0064 ID. CVO-A. 64ct Low oblique aerial view across Spirit Lake looking toward Mount St. Helens. Note large amount of debris and logs in the water. The lake is about 200 feet higher than before the eruption. Skamania County, Washington. 1980. #1:/Mount St. Helens*msh198005m/cvoa0065 ID. CVO-A. 65ct Oblique aerial view of secondary steam fumarole near Spirit Lake. Fumarole is 300 feet in diameter. Eruptions occurred hourly and continued for two months after May 18, 1980. Skamania County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0066 ID. CVO-A. 66ct Spirit Lake from the crater of Mount St. Helens. Nearly half of the surface of the lake is covered with logs and debris. Note the vegetation stripped from all hills extending 18 miles northeastward. Skamania County, Washington. 1980. #1:/Post A.S. Collection-Mount St. Helens*msh198006/cvoa0067 ID. CVO-A. 67ct A closer oblique aerial view of the east arm of Spirit Lake. Note the trees washed from the hillsides. Blast material displaced Spirit Lake water upward onto hills - the water then picked up the logs and flowed back into the lake on top of the blast materials. Skamania County, Washington. June 4, 1980. (Photo by Austin Post, USGS) #1:/Mount St. Helens*msh1980/cvoa0068 ID. CVO-A. 68ct Oblique aerial view of south shore of Spirit Lake looking toward secondary fumaroles and North Fork Toutle River valley. Note ridge of blast materials - depth at this point is 650 feet. Skamania County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0070 ID. CVO-A. 70ct Oblique aerial view of one of the larger secondary fumaroles, about 500 feet in diameter, Mount St. Helens. Cowlitz County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0071 ID. CVO-A. 71ct Oblique aerial view of one of the larger secondary fumaroles, about 500 feet in diameter, Mount St. Helens. Cowlitz County, Washington. 1980. #1:/Glicken H.C. Collection-Mount St. Helens*msh198005b/cvoa0072 ID. CVO-A. 72ct Mount St. Helens viewed from Coldwater Ridge, taken in early May. Bulge at upper left side of peak between Dogs Head and Goat Rocks. Note dense fir forest. Photo by Harry Glicken. Skamania County, Washington. May 17, 1980. #1:/Glicken H.C. Collection-Mount St. Helens*msh198009/cvoa0073 ID. CVO-A. 73ct Oblique aerial view of Mount St. Helens, after the May 18 eruption, from the same point as photo 72ct. Forests are gone. Light-colored material is pumice from pyroclastic flows. Note material blasted over ridge into South Coldwater Creek. Photo by Harry Glicken. Skamania County, Washington. September 8, 1980. #1:/Mount St. Helens*msh1980/cvoa0077 ID. CVO-A. 77ct A closer view of the dome. It was later blasted out by the July 22, 1980 eruption. Skamania County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0079 ID. CVO-A. 79ct Oblique aerial view of a keyhole shaped crater in floor of the crater of Mount St. Helens. The notch at the upper left is the remains of Shoestring Glacier. Skamania County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0084 ID. CVO-A. 84ct Oblique aerial view of snow fields under ash on eastern flank of Mount St. Helens after May 18, 1980, eruption. Skamania County, Washington. 1980. #1:/Mount St. Helens*msh198006/cvoa0085 ID. CVO-A. 85ct A hot spot in the pyroclastic flows. Geologist J.R. Williams examines a fumarole area within the cooler avalanche deposit at the northern base of Mount St. Helens. Sulphur stains on the pumice. Note the relatively small particle size of the material. Rocks are very dense and hot; heat was derived from hot rock material buried within the deposit. Skamania or Cowlitz County, Washington. June 5, 1980. Figure 37-A, U.S. Geological Survey Professional Paper 1249. #1:/Mount St. Helens*msh1980/cvoa0086 ID. CVO-A. 86ct Oblique aerial view showing an interesting pattern of the pyroclastic flow from Mount St. Helens. Skamania or Cowlitz County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0087 ID. CVO-A. 87ct View of pyroclastic flow from Mount St. Helens, taken at ground level. Skamania or Cowlitz County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0088 ID. CVO-A. 88ct Most of the pumice is baseball to basketball sized stones Geologist for scale. Note how flow follows topography. Mount St. Helens, Skamania or Cowlitz County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0089 ID. CVO-A. 89ct Eroded avalanche and blast material in North Fork Toutle River valley, five miles downstream from Mount St. Helens. Material is 450 feet deep at this point. Cowlitz County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0090 ID. CVO-A. 90ct Eroded avalanche and blast material in North Fork Toutle River valley, five miles downstream from Mount St. Helens. Material is 450 feet deep at this point. Cowlitz County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0092 ID. CVO-A. 92ct One of the few larger rocks in the Mount St. Helens debris and avalanche material, scarred. Keys for scale. Skamania or Cowlitz County, Washington. 1980. #1:/Topinka L. Collection-Mount St. Helens*msh198008/cvoa0093 ID. CVO-A. 93ct Mounds of soft clay-like material on Mount St. Helens debris pile - very dense. (Photo by Lyn Topinka. Skamania or Cowlitz County, Washington. August 22, 1980. #1:/Mount St. Helens*msh1980/cvoa0094 ID. CVO-A. 94ct Large ice blocks (darker rock at left center) in Mount St. Helens avalanche material in North Fork Toutle valley above Elk Rock. Cowlitz County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0095 ID. CVO-A. 95ct Mount St. Helens avalanche material in North Fork Toutle valley above Elk Rock. Cowlitz County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0096 ID. CVO-A. 96ct Mount St. Helens avalanche material in North Fork Toutle valley above Elk Rock. Note man, white speck in upper middle of view. Cowlitz County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0097 ID. CVO-A. 97ct Geologist on ice block in Mount St. Helens avalanche material in North Fork Toutle valley above Elk Rock. Cowlitz County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0099 ID. CVO-A. 99ct Some armoring on the bed, North Fork Toutle River valley. Ponding levels shown by marks on debris piles. Material here is 400 feet deep some 6 miles downstream from the Mount St. Helens. Cowlitz County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0100 ID. CVO-A. 100ct Seven different levels of ponding are indicated by the erosion on the pile of Mount St. Helens debris, North Fork Toutle River valley. Geologist for scale. Cowlitz County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0102 ID. CVO-A. 102ct Numerous pools were left in the debris. Color of water depended upon chemical quality of the water. Cowlitz County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0103 ID. CVO-A. 103ct A different view of one of numerous pools left in the debris. Color of water depended on chemical quality of the water. Cowlitz County, Washington. 1980. #1:/Topinka L. Collection-Mount St. Helens*msh198008/cvoa0107 ID. CVO-A. 107ct Oblique aerial view of hummocks at the toe of the avalanche material near Camp Baker and Corps of Engineers retention dam 16 miles downstream from Mount St. Helens. Note truck in foreground for scale. Avalanche depth 100 feet. Cowlitz County, Washington. August 1980. (Photo by Lyn Topinka) #1:/Mount St. Helens*msh1980/cvoa0109 ID. CVO-A. 109ct Oblique aerial view of trees blasted down in a 150-square-mile area. Skamania and/or Cowlitz County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0111 ID. CVO-A. 111ct A different view of edge of blast zone which left an almost definite line between standing and downed trees. Standing trees were killed by the blast. Skamania and/or Cowlitz County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0112 ID. CVO-A. 112ct Near oblique aerial view of edge of blast zone which left an almost definite line between standing and downed trees. Standing trees were killed by the blast. Skamania and/or Cowlitz County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0113 ID. CVO-A. 113ct Oblique aerial view of downed trees over Highway 504 and Weyerhaeuser logging road (at right). Car in them is at the bend in the highway. Cowlitz County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0114 ID. CVO-A. 114ct Oblique aerial view of car trapped by blast - fallen trees. Two people were killed. Cowlitz County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0115 ID. CVO-A. 115ct Different oblique aerial views of more trees downed. Note how blast followed the contours of the mountainside. Skamania and/or Cowlitz County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0116 ID. CVO-A. 116ct Different oblique aerial views of more trees downed. Note how blast followed the contours of the mountainside. Skamania and/or Cowlitz County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0117 ID. CVO-A. 117ct Different oblique aerial views of more trees downed. Note how blast followed the contours of the mountainside. Skamania and/or Cowlitz County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0118 ID. CVO-A. 118ct Different oblique aerial views of more trees downed. Note how blast followed the contours of the mountainside. Skamania and/or Cowlitz County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0120 ID. CVO-A. 120ct Blast crossed divide and reached into South Fork Toutle River valley here. Note standing trees killed by the blast - seven miles downstream from the mountain. Cowlitz County, Washington. 1980. #1:/Post A.S. Collection-Mount St. Helens*msh198006/cvoa0121 ID. CVO-A. 121ct Higher altitude view of denuded mountains. Photo by Austin Post. Skamania and/or Cowlitz County, Washington. June 19, 1980 #1:/Mount St. Helens*msh1980/cvoa0122 ID. CVO-A. 122ct Trees torn from their base, on Harry's Ridge five miles north of Mount St. Helens crater. Skamania County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0123 ID. CVO-A. 123ct A nearer view of tree torn from base on Harry's Ridge, five miles north of Mount St. Helens crater. Skamania County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0127 ID. CVO-A. 127ct On Coldwater Ridge, ash is about 18 inches thick. Geologist in trench for scale. Skamania County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0133 ID. CVO-A. 133ct New vegetation breaking through ash deposits along North Fork Toutle River. Cowlitz County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0134 ID. CVO-A. 134ct Worms in water along Muddy River, as life comes back to the area. Skamania County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa0137 ID. CVO-A. 137ct "Injured man" sign, trapped in ash along east shore of Spirit Lake. Two men had hiked in from the east and were later rescued. Skamania County, Washington. 1980. #1:/Mount St. Helens*msh1980/cvoa083x ID. CVO-A. 83ct The beheaded Shoestring Glacier. The ice is about 50 feet thick here. Skamania County, Washington. 1980. #1:/Mount St. Helens*msh1981/cvob0001 ID. CVO-B. 1ct Aerial view of snow-covered Mount St. Helens from near Spirit Lake. Skamania County, Washington. April 25, 1981. #1:/Mount St. Helens*msh1982/cvob0002 ID. CVO-B. 2ct Mount St. Helens reflected in Spirit Lake, two years after the eruption of May 18, 1980. Skamania County, Washington. May 19, 1982. #1:/Mount St. Helens*msh198004/cvob0005 ID. CVO-B. 5ct Mount St. Helens from south of Chehalis. Lewis and Skamania Counties, Washington. April 12, 1980. #1:/Mount St. Helens*msh1981/cvob0006 ID. CVO-B. 6ct Mount St. Helens from south of Challis. The loss of the upper part of the volcano during the eruption of May 18, 1980, is very apparent. Lewis and Skamania Counties, Washington. February 28, 1981. #1:/Mount St. Helens*msh198007/cvob0007 ID. CVO-B. 7ct Eruptive plume of July 22, 1980 eruption, third pulse, as seen from Tacoma, Washington. Pierce and Skamania Counties, Washington. July 22, 1980. #1:/Mount St. Helens*msh198008/cvob0008 ID. CVO-B. 8ct Aerial view approaching Mount St. Helens, during the August 7 eruption. Skamania County, Washington. August 7, 1980. #1:/Mount St. Helens*msh198008/cvob0009 ID. CVO-B. 9ct Nearer aerial view of Mount St. Helens during August 7 eruption, a small plume beginning to rise. Skamania County, Washington. August 7, 1980. #1:/Mount St. Helens*msh198009/cvob0012 ID. CVO-B. 12ct May 18, 1980, mudline near I-5 bridge. High level reached by mud visible on trees; geologist for scale. Cowlitz County, Washington. September 30, 1980. #1:/Mount St. Helens*msh198010/cvob0013 ID. CVO-B. 13ct Mudline on trees, Muddy River near bridge. Scientist for scale. Skamania County, Washington. October 23, 1980. #1:/Mount St. Helens*msh1981/cvob0014 ID. CVO-B. 14ct Home devastated by mudflow, Toutle River near Tower, Washington. Cowlitz County, Washington. March 26, 1981. #1:/Mount St. Helens*msh198007/cvob0015 ID. CVO-B. 15ct Home devastated by mudflow, South Fork Toutle River near Toutle, Washington. Cowlitz County, Washington. July 16, 1980. #1:/Mount St. Helens*msh198007/cvob0016 ID. CVO-B. 16ct Top of mudflow just below door knob of devastated house trailer, Cowlitz River. Cowlitz County, Washington. July 15, 1980. #1:/Mount St. Helens*msh198007/cvob0017 ID. CVO-B. 17ct Barn with legend on it: "15 feet of mud!" and arrow pointing down to top of mudflow, Cowlitz River. Cowlitz County, Washington. July 15, 1980. #1:/Mount St. Helens*msh198007/cvob0018 ID. CVO-B. 18ct Mailboxes with mudflow almost to top of posts, Cowlitz River. Cowlitz County, Washington. July 15, 1980. #1:/Mount St. Helens/cvob0019 ID. CVO-B. 19ct USGS survey crew, Upper Muddy River, measuring mudflow damage. Woman scientist at right. Skamania County, Washington. September 22, 1980. #1:/Mount St. Helens*msh198010/cvob0020 ID. CVO-B. 20ct Woman scientist of USGS survey crew measuring mudflow damage, Upper Muddy River, with Mount St. Helens and the May 18, 1980, mudflow in background. Skamania County, Washington. October 24, 1980. #1:/Mount St. Helens*msh198010/cvob0022 ID. CVO-B. 22ct The May 18, 1980, mudflow undercut banks on Pine Creek. Woman geologist stands on undercut bank at left. Skamania County, Washington. October 1980. #1:/Mount St. Helens*msh198010/cvob0024 ID. CVO-B. 24ct Aerial view of erosion which began almost immediate after the May 18 eruption - channel incision in the blast zone, Smith Creek. Geologist for scale. Skamania County, Washington. October 4/5, 1980. #1:/Mount St. Helens*msh198010/cvob0025 ID. CVO-B. 25ct Mount St. Helens and May 18, 1980, mudflow from the east, looking towards Shoestring Glacier from Upper Muddy River. Skamania County, Washington. October 24, 1980. #1:/Mount St. Helens*msh198010/cvob0026 ID. CVO-B. 26ct Channel erosion on the mudflow surface, looking downstream from Upper Muddy River. Compare with photo 27. Skamania County, Washington. October 24, 1980. #1:/Mount St. Helens*msh1981/cvob0027 ID. CVO-B. 27ct Channel erosion on mudflow surface, looking downstream from Upper Muddy River about a year after the May 18, 1980, eruption. Compare with photo 26. Skamania County, Washington. October 10, 1981. #1:/Mount St. Helens*msh1981/cvob0028 ID. CVO-B. 28ct Scientists surveying channel erosion Upper West Fork Muddy River. Note instrument and geologist on bank, rodman in drainage channel. Skamania County, Washington. June 26, 1981. #1:/Mount St. Helens*msh198011/cvob0029 ID. CVO-B. 29ct Waterfall in blast zone, Smith Creek. Skamania County, Washington. November 13, 1980. #1:/Mount St. Helens*msh198010/cvob0033 ID. CVO-B. 33ct Spirit Lake was devastated. Aerial view looking across Spirit Lake with Mt. Rainier in distance. Skamania County, Washington. October 4, 1980. #1:/Mount St. Helens*msh198009/cvob0034 ID. CVO-B. 34ct Aerial view looking across Spirit Lake from the west. Skamania County, Washington. September 16, 1980. #1:/Mount St. Helens*msh1981/cvob0036 ID. CVO-B. 36ct Aerial view of downed logs on Spirit Lake. Note the Water Resources sampling boat. Skamania County, Washington. September 16, 1981. #1:/Mount St. Helens*msh198009/cvob0038 ID. CVO-B. 38ct Tree blowdown, Smith Creek. Note two geologists at lower right for scale. Skamania County, Washington. September 24, 1980. #1:/Mount St. Helens*msh198009/cvob0039 ID. CVO-B. 39ct Aerial view of July 22, 1980 pyroclastic flow. Skamania County, Washington. September? 1980. #1:/Mount St. Helens*msh198009/cvob0040 ID. CVO-B. 40ct Aerial view of patterns in pyroclastic flow. Skamania County, Washington. September? 1980. #1:/Mount St. Helens*msh1983/cvob0042 ID. CVO-B. 42ct Scientists in pit on pumice plain. Note erosion into pit in three years since May 18, 1980, eruption. Skamania County, Washington. October 5, 1983. #1:/Mount St. Helens*msh1983/cvob0044 ID. CVO-B. 44ct Aerial view of 1983 dome from the northeast. Skamania County, Washington. May 26, 1983. #1:/Mount St. Helens*msh198009/cvob0045 ID. CVO-B. 45ct Mount St. Helens in 1980 as viewed from above Harrys Ridge, without visible dome. Skamania County, Washington. September 30, 1980. #1:/Mount St. Helens*msh1984/cvob0046 ID. CVO-B. 46ct Over three years after May 18, 1980 eruption, Mount St. Helens as viewed from Harrys Ridge, with dome. Skamania County, Washington. January 9, 1984. #1:/Mount St. Helens*msh1984/cvob0047 ID. CVO-B. 47ct Mount St. Helens continues to change. In 1983 many events happened within two months beginning with two small gas and ash blasts February 3. Lahar from crater resulting from the February 3, 1983, blast. Dome in center of view. Skamania County, Washington. February 3, 1984. #1:/Mount St. Helens*msh1983/cvob0048 ID. CVO-B. 48ct Close-up, blast line on Mount St. Helens east crater wall. Skamania County, Washington. February 3, 1983. #1:/Mount St. Helens*msh1983/cvob0049 ID. CVO-B. 49ct In mid-February 1983 a new lobe emerged on east side of dome. View of Mount St. Helens snow-covered dome and crater. Skamania County, Washington. February 11, 1983. #1:/Mount St. Helens*msh1983/cvob0050 ID. CVO-B. 50ct In March 1983 a spine appeared on the new lobe of the Mount St. Helens dome. Skamania County, Washington. March 2, 1983. #1:/Mount St. Helens*msh1983/cvob0051 ID. CVO-B. 51ct Oblique aerial view of Mount St. Helens spine from the south. Skamania County, Washington. March 2, 1983. #1:/Mount St. Helens*msh1983/cvob0052 ID. CVO-B. 52ct Aerial close up of 200 feet tall Mount St. Helens spine. Skamania County, Washington. March 2, 1983. #1:/Mount St. Helens*msh1981/cvob0053 ID. CVO-B. 53ct The USGS measures the Mount St. Helens dome in many ways. USGS measuring dome, from 8 km away, on Harrys Ridge. Skamania County, Washington. October 31, 1981. #1:/Mount St. Helens*msh1983/cvob0054 ID. CVO-B. 54ct USGS measuring gasses from Mount St. Helens dome on Sugar Bowl. Skamania County, Washington. October 21, 1983. #1:/Mount St. Helens*msh1981/cvob0055 ID. CVO-B. 55ct USGS measuring Mount St. Helens dome from crater floor. Skamania County, Washington. August 22, 1981. #1:/Mount St. Helens*msh1983/cvob0057 ID. CVO-B. 57ct View illustrating size of Mount St. Helens dome. Note scientists on right; look for bright orange vest. Skamania County, Washington. May 26, 1983. #1:/Mount St. Helens*msh1981/cvob0059 ID. CVO-B. 59ct Geologists measuring radial crack with steel tape. Mount St. Helens, Skamania County, Washington. May 12, 1981. #1:/Mount St. Helens*msh1981/cvob0061 ID. CVO-B. 61ct Seismic station, north side of Mount St. Helens dome. Skamania County, Washington. May 12, 1981. #1:/Mount St. Helens*msh1981/cvob0062 ID. CVO-B. 62ct Seismic station, north side of Mount St. Helens, "overrun" by dome. Skamania County, Washington. August 4, 1981. #1:/Mount St. Helens*msh1981/cvob0063 ID. CVO-B. 63ct Hot spots on Mount St. Helens dome visible as glow through hole in crust. Skamania County, Washington. August 22, 1981. #1:/Mount St. Helens*msh1981/cvob0064 ID. CVO-B. 64ct Color in Mount St. Helens crater: sulfur-covered rock on crater floor. Skamania County, Washington. May 12, 1981. #1:/Mount St. Helens*msh1983/cvob0065 ID. CVO-B. 65ct Measuring the flanks of Mount St. Helens. Outer network measuring deformation, view from Clearcut. In the winter the towers are just barely visible. Skamania County, Washington. April 6, 1983. #1:/Mount St. Helens*msh1982/cvob0066 ID. CVO-B. 66ct Measuring the flanks of Mount St. Helens. Outer network measuring deformation, view from Studebaker Ridge in the summer. Skamania County, Washington. July 9, 1982. #1:/Mount St. Helens*msh1982/cvob0067 ID. CVO-B. 67ct Geologist using Rangemaster EDM, shooting laser beam to target on flanks of Mount St. Helens. Skamania County, Washington. July 9, 1982. #1:/Mount St. Helens*msh1982/cvob0070 ID. CVO-B. 70ct Ash burst from Mount St. Helens as seen from Harrys Ridge. Snow covers upper part of volcano Skamania County, Washington. May 19, 1982. #1:/Mount St. Helens*msh1983/cvob0071 ID. CVO-B. 71ct Gas and ash burst from south side of Mount St. Helens dome; viewed through wide angle lens. Skamania County, Washington. April 29, 1983. #1:/Mount St. Helens*msh1983/cvob0072 ID. CVO-B. 72ct Gas and ash burst from south side of Mount St. Helens dome, viewed with normal 50mm lens. These bursts occasionally throw boulders about. Skamania County, Washington. April 29, 1983. #1:/Mount St. Helens*msh1983/cvob0074 ID. CVO-B. 74ct Photography setup on Sugar Bowl, Mount St. Helens, photographing plume. Skamania County, Washington. August 19, 1983. #1:/Mount St. Helens*msh1983/cvob0075 ID. CVO-B. 75ct Sequence showing a Mount St. Helens ash burst in progress, timed from 16:2#1:30 to 16:22:10. Skamania County, Washington. April 16, 1983. #1:/Mount St. Helens*msh1983/cvob0076 ID. CVO-B. 76ct Sequence showing a Mount St. Helens ash burst in progress, timed from 16:2#1:30 to 16:22:10. Skamania County, Washington. April 16, 1983. #1:/Mount St. Helens*msh1983/cvob0077 ID. CVO-B. 77ct Sequence showing a Mount St. Helens ash burst in progress, timed from 16:2#1:30 to 16:22:10. Skamania County, Washington. April 16, 1983. #1:/Mount St. Helens*msh1983/cvob0078 ID. CVO-B. 78ct Sequence showing a Mount St. Helens ash burst in progress, timed from 16:2#1:30 to 16:22:10. Skamania County, Washington. April 16, 1983. #1:/Mount St. Helens*msh1983/cvob0079 ID. CVO-B. 79ct Sequence showing a Mount St. Helens ash burst in progress, timed from 16:2#1:30 to 16:22:10. Skamania County, Washington. April 16, 1983. #1:/Mount St. Helens*msh1982/cvob0081 ID. CVO-B. 81ct Time-lapse camera and still photography camera setup. There are numerous photo stations throughout the crater. This particular station approximately one kilometer to the north of Mount St. Helens dome has been an ideal spot for movie cameras (pictured), and also for 35mm photography to document the growth of the dome. Skamania County, Washington. May 19, 1982. #1:/Mount St. Helens*msh1982/cvob0086 ID. CVO-B. 86ct The August 1982 Mount St. Helens lobe extrusion was on the west (right). Dome from photo station. Skamania County, Washington. September 1, 1982. #1:/Mount St. Helens*msh1982/cvob0092 ID. CVO-B. 92ct Protection from Mount St. Helens ash, camera mount. Skamania County, Washington. August 17, 1982. #1:/Mount St. Helens*msh1983/cvob0094 ID. CVO-B. 94ct The winter snow wasn't a hazard for everyone. Helicopter pilot enjoying. Mount St. Helens, Skamania County, Washington. April 6, 1983. #1:/Mount St. Helens*msh1982/cvob0095 ID. CVO-B. 95ct Geologists taking deformation readings in Mount St. Helens crater in summer. Skamania County, Washington. August 17, 1982. #1:/Mount St. Helens*msh1983/cvob0096 ID. CVO-B. 96ct Geologists taking deformation readings in winter at Mount St. Helens. One of them is up to his shoulders in snow. Skamania County, Washington. March 22, 1983. #1:/Mount St. Helens*msh1983/cvob0097 ID. CVO-B. 97ct Assistants are hard to find in the winter months! Snowman between two geologists at work. Mount St. Helens, Skamania County, Washington. February 11, 1983. #1:/Mount St. Helens*msh198008/cvob0099 ID. CVO-B. 99ct Two helicopters on debris avalanche, near Elk Rock, 11 miles from Mount St. Helens Cowlitz County, Washington. August 22, 1980. #1:/Mount St. Helens*msh198008/cvob0101 ID. CVO-B. 101ct Colorful ponds formed on debris avalanche, North Fork Toutle River. This good-sized one is Elk Rock Lake; geologist at left for scale. Cowlitz County, Washington. August 22, 1980. #1:/Mount St. Helens*msh198008/cvob0102 ID. CVO-B. 102ct Corps of Engineers trying to breach Elk Rock Lake by hand - it did not work. Nature breached the lake five days later. Equipment and small bridges downstream were damaged. Cowlitz County, Washington. August 22, 1980. #1:/Mount St. Helens*msh198008/cvob0104 ID. CVO-B. 104ct Elk Rock Lake after it was breached; geologist at right. Cowlitz County, Washington. August 27, 1980. #1:/Mount St. Helens*msh1983/cvob0105 ID. CVO-B. 105ct Today the hazard is great should the large lakes break out. Corps of Engineers pump station on Spirit Lake, north of Mount St. Helens, used to maintain the lake level. Skamania County, Washington. September 23, 1983. #1:/Mount St. Helens*msh1982/cvob0106 ID. CVO-B. 106ct The USGS has a network of Early Warning gages. USGS, Water Resources Division, Spirit Lake Early Warning Flood Gage. Mount St. Helens, Skamania County, Washington. May 19, 1982. #1:/Mount St. Helens*msh1983/cvob0107 ID. CVO-B. 107ct WRD Coldwater Lake Exit Early Warning Flood Gage. Cowlitz County, Washington. 1983. #1:/Mount St. Helens*msh198011/cvob0108 ID. CVO-B. 108ct Sediment sampling activity - scientist in river. Cowlitz County, Washington. November 8, 1980. #1:/Mount St. Helens*msh1982/cvob0109 ID. CVO-B. 109ct Since bridges have been rebuilt - WRD sediment sampling from bridge, Toutle River near Tower Road. Cowlitz County, Washington. December 4, 1982. #1:/Mount St. Helens*msh1981/cvob0111 ID. CVO-B. 111ct Scientists repairing sediment sampler. Cowlitz County, Washington. December 6, 1981. #1:/Mount St. Helens*msh1981/cvob0112 ID. CVO-B. 112ct WRD stream gaging, Toutle River near Tower Road. Cowlitz County, Washington. December 5, 1981. #1:/Mount St. Helens*msh198012/cvob0113 ID. CVO-B. 113ct Geologist cranking fast to raise WRD equipment from river - logs on the way. Cowlitz County, Washington. December 6, 1981. #1:/Mount St. Helens*msh198007/cvob0115 ID. CVO-B. 115ct The Toutle River near Interstate 5 soon after the May 18, 1980, mudflow. View from photo station, Toutle River at Highway 99, looking downstream at the Interstate 5 bridge. Cowlitz County, Washington. July 6, 1980. #1:/Mount St. Helens*msh1981/cvob0116 ID. CVO-B. 116ct View from photo station, Toutle River at Highway 99, looking downstream at the Interstate 5 bridge, one year later and after dredging by the Corps of Engineers. Cowlitz County, Washington. June 28, 1981. #1:/Mount St. Helens*msh1981/cvob0121 ID. CVO-B. 121ct Each day is different. Mount St. Helens steaming, with clear skies. Mt Rainier visible in the distance. Skamania and Pierce Counties, Washington. April 25, 1981. #1:/Mount St. Helens*msh1983/cvob0122 ID. CVO-B. 122ct Aerial view of a quiet Mount St. Helens just barely peaking up above the fog. Skamania County, Washington. September 23, 1983. #1:/Mount St. Helens*msh198012/cvob0124 ID. CVO-B. 124ct Mount St. Helens with its slopes covered in ash, the tell-tale signs of previous ash bursts. Skamania County, Washington. December 16, 1980. #1:/Mount St. Helens*msh1983/cvob0126 ID. CVO-B. 126ct Aerial view of the south rim of Mount St. Helens crater, looking at the dome. Skamania County, Washington. April 15, 1983. #1:/Mount St. Helens*msh1983/cvob0132 ID. CVO-B. 132ct To the south, Mt. Hood is near Portland, Oregon. Mt. Hood from across the pumice plain at Mount St. Helens. Skamania County, Washington, and Hood River County, Oregon. July 11, 1983. #1:/Mount St. Helens*msh198010/cvob0136 ID. CVO-B. 136ct Aerial view across Spirit Lake, north of Mount St. Helens, and devastated area with snow-covered Mt. Rainier in the distance. Mount Rainier National Park, Skamania and Pierce Counties, Washington. October 27, 1980. #1:/Washington State Department of Transportation Collection-Mount St. Helens*msh1981/cvoc0001 ID. CVO-C. 1ct Vertical aerial view of Mount St. Helens crater with the dome. Photo by Washington State Department of Transportation. Skamania County, Washington. 1981. #1:/Heliker C. Collection-Mount St. Helens*msh198007/cvoc0002 ID. CVO-C. 2ct Oblique aerial view of June 1980 dome, the first dome which formed in Mount St. Helens crater during the 1980 activity. The dome was partly destroyed during the July 22, 1980 eruption. Photo by Christina Heliker. Skamania County, Washington. July 18, 1980. #1:/Mount St. Helens*msh198008/cvoc0005 ID. CVO-C. 5ct Oblique aerial view showing Mount St. Helens August, 1980, dome within the crater blasted out by the July 22, 1980, eruption and the walls of the crater. Note the blasted-out June dome. The line running diagonally from upper left to lower right to the left of the crater is the rampart. There was a breach in the June dome on the southwest side of the crater. Directly behind the rising fume there is a low point in the crater rim. It is here that the June dome was totally blasted away. Skamania County, Washington. August 1980. #1:/Mount St. Helens*msh198011/cvoc0009 ID. CVO-C. 9ct Oblique aerial view of Mount St. Helens October, 1980, dome after it had grown to full size. Note the radial cracks extending from the dome. Skamania County, Washington. November 26, 1980. #1:/Mount St. Helens*msh1982/cvoc0010 ID. CVO-C. 10ct Edge of Mount St. Helens December, 1980, lobe with steeply dipping foliation or sheeting along a margin of the dome. This is not evident very frequently but it was in this case. Skamania County, Washington. June 23, 1982. #1:/Mount St. Helens*msh1981/cvoc0011 ID. CVO-C. 11ct Oblique aerial view showing spreading center on top of the new Mount St. Helens September, 1981, lobe. The spreading center is the smooth material which is relatively dense and blocky. Skamania County, Washington. September 11, 1981. #1:/Mount St. Helens*msh1981/cvoc0012 ID. CVO-C. 12ct Oblique aerial head-on view of Mount St. Helens September, 1981, lobe. Note the spreading center up on the top and also the lobate nature of these lobes. They could be considered lava flows by some people except for their different aspect ratios. Skamania County, Washington. September 11, 1981. #1:/Mount St. Helens*msh1981/cvoc0021 ID. CVO-C. 21ct Dry tiltmeter site; in the foreground the tiltmeter and the electronic equipment present on the top of the west rampart of Mount St. Helens. Geologists in background. Skamania County, Washington. May 20, 1981. #1:/Mount St. Helens*msh1981/cvoc0022 ID. CVO-C. 22ct Problems working in the winter. Yellow Rock tiltmeter site, Mount St. Helens, with Dan Dzurisin in thick snowpack hole,. Skamania County, Washington. December 23, 1981. #1:/Mount St. Helens*msh1981/cvoc0028 ID. CVO-C. 28ct Deformation, radial crack pattern on Mount St. Helens crater floor. Oblique aerial view looking southeast. The old rampart is present in the lower left hand corner of the view. These radial cracks open and some new ones form before eruptions. Skamania County, Washington. January 7, 1981. #1:/Mount St. Helens*msh1981/cvoc0029 ID. CVO-C. 29ct Cracks forming before an eruption of Mount St. Helens. Footprint made on January 9, 1981 was cracked several days later. Footprint is right in front of a thrust fault. Skamania County, Washington. January 1981. #1:/Mount St. Helens*msh1981/cvoc0031 ID. CVO-C. 31ct A wide crack in the north side of Mount St. Helens dome into which a person could walk. Geologist in crack for scale. Skamania County, Washington. February 3, 1981. #1:/Mount St. Helens*msh1981/cvoc0032 ID. CVO-C. 32ct Oblique aerial view showing the pattern of thrust faults in Mount St. Helens southwest crater floor. Thrusts are directed away from the dome, which is off the top of the photo. The thrust faults have lobate frontal scarps facing away from the dome and are bounded by tear faults which are the radial cracks noted in the previous several slides. The dark area at the bottom of the slide is dirty snow. The width of the view is on the order of a hundred meters or so. Skamania County, Washington. June 24, 1981. #1:/Mount St. Helens*msh1982/cvoc0033 ID. CVO-C. 33ct Scientist at the "Outward Bound" thrust fault, Mount St. Helens. Note how high thrust scarps can get; although, there have been higher scarps than this. Thrust faults grow from small wrinkles on the crater floor. Skamania County, Washington. August 18, 1982. #1:/Mount St. Helens*msh1982/cvoc0040 ID. CVO-C. 40ct Geologist measuring at Don's Place site, Mount St. Helens. Skamania County, Washington. August 17, 1982. #1:/Mount St. Helens*msh198005b/cvoe0005 ID. CVO-E. 5ct Phreatic eruption of Mount St. Helens. View from Coldwater II observation station, 1757 hrs. Skamania County, Washington. May 11, 1980. #1:/Mount St. Helens*msh198005b/cvoe0006 ID. CVO-E. 6ct Oblique aerial view side view from helicopter showing extent of bulge on north side of Mount St. Helens. Skamania County, Washington. May 17, 1980. #1:/Mount St. Helens*msh198005b/cvoe0007 ID. CVO-E. 7ct Scientists measuring the outward movement of Mount St. Helens bulge from Coldwater II observation station, using electronic distance measuring device. It was found the bulge was moving outward at a rate of 4 feet per day. By May 17, parts of the bulge had grown outward more than 300 feet. Skamania County, Washington. May 4, 1980. #1:/Mount St. Helens*msh198005/cvoe0008 ID. CVO-E. 8ct Mount St. Helens from Coldwater II observation station. USGS geologist observing. Skamania County, Washington. May 1980. #1:/Mount St. Helens*msh198005b/cvoe0009 ID. CVO-E. 9ct View from helicopter of David Johnston near crest of the bulge on the north side of Mount St. Helens, sampling gases from fumaroles. David is near the center of the picture. Skamania County, Washington. May 17, 1980. #1:/Johnston D. Collection-Mount St. Helens*msh198005b/cvoe0010 ID. CVO-E. 10ct The last photo taken of David Johnston, at Coldwater II observation station, Mount St. Helens, sitting in chair by trailer. 1900 hrs. Skamania County, Washington. May 17, 1980. #1:/Mount St. Helens*msh198005m/cvoe0019 ID. CVO-E. 19ct Oblique aerial view from helicopter showing lahars, or mudflows, forming on debris avalanche, North Fork Toutle River valley, in the early afternoon. Cowlitz County, Washington. May 18, 1980. #1:/Moore J.G. Collection-Mount St. Helens*msh198005m/cvoe0025 ID. CVO-E. 25ct Simple diagram by J.G. Moore showing Mount St. Helens eruption sequence of May 18, 1980. Skamania, County, Washington. #1:/Mount St. Helens*msh198005m/cvoe0029 ID. CVO-E. 29ct Generalized map of flowage deposits from the May 18, 1980, eruption, around Mount St. Helens. Skamania and Cowlitz Counties, Washington. #1:/Mount St. Helens*1980/cvoe0030 ID. CVO-E. 30ct Oblique aerial view of debris avalanche deposit with Mount St. Helens in the background. Skamania and Cowlitz Counties, Washington. Ca. 1980. #1:/Mount St. Helens*msh1980/cvoe0031 ID. CVO-E. 31ct Hummock with a square meter of outcrop cleared of slope wash, so the rocks within can be measured and identified. Mount St. Helens, Skamania or Cowlitz County, Washington. ca. 1980. #1:/Mount St. Helens*msh1980/cvoe0032 ID. CVO-E. 32ct Geologist performing sand-cone density test on debris avalanche near Coldwater Lake. This test determines the density of the debris avalanche. Skamania or Cowlitz County, Washington. Ca. 1980. #1:/Topinka L. Collection-Mount St. Helens*msh198009/cvoe0035 ID. CVO-E. 35ct View of Holly A. Martinson studying mudflows on south side of Mount St. Helens. (Photo by Lyn Topinka. Skamania County, Washington. September 28, 1980. #1:/Mount St. Helens*msh198008/cvoe0036 ID. CVO-E. 36ct Oblique aerial view of deposit which dammed Spirit Lake, north of Mount St. Helens. Lake visible at top of view. Skamania County, Washington. August 1982. #1:/Pringle P.J. Collection-Mount St. Helens*msh1982/cvoe0037 ID. CVO-E. 37ct Art Vaughan at channel near western end of debris avalanche. Scientists want to knave how resistant the debris avalanche is to erosion, so that they will be able to predict how much sediment from it will wash downstream in channels like this one. Photo by Patrick J. Pringle. Cowlitz County, Washington. September 1982. #1:/Mount St. Helens*msh198007/cvoe0041 ID. CVO-E. 41ct Oblique aerial view of Mount St. Helens crater. Eruption cloud colored pink by sunset after July 22, 1980, eruption. Photo by Jim Vallance. Skamania County, Washington. July 22, 1980. #1:/Mount St. Helens*msh1981/cvof0005 ID. CVO-F. 5ct View of Mount St. Helens from the northwest, taken from south of Chehalis. (Photo by Lyn Topinka. Skamania County, Washington. February 28, 1981. #1:/Cameron K. Collection-Mount St. Helens*msh1977/cvof0006 ID. CVO-F. 6ct Mount St. Helens from the south, from east of West Linn, Oregon. 1977. Photo by Ken Cameron. #1:/Cameron K. Collection-Mount St. Helens*msh1980/cvof0007 ID. CVO-F. 7ct Mount St. Helens after the May 18 eruption, from the south, from east of West Linn, Oregon. 1980. Photo by Ken Cameron #1:/Topinka L. Collection-Mount St. Helens*msh198009/cvof0016 ID. CVO-F. 16ct Mount St. Helens from the pumice plain, from the northwest. (Photo by Lyn Topinka Skamania County, Washington. September 16, 1980. #1:/Topinka L. Collection-Mount St. Helens*msh1982/cvof0018 ID. CVO-F. 18ct Mount St. Helens two years later from Spirit Lake, north of Mount St. Helens. (Photo by Lyn Topinka. Skamania County, Washington. May 19, 1982. Pages 44-45, U.S. Geological Survey Earthquake Information Bulletin, v. 16, no.2, March-April 1984. #1:/Topinka L. Collection-Mount St. Helens*msh198010/cvof0021 ID. CVO-F. 21ct Gas and ash emission from Mount St. Helens rising to 19,000 feet, as viewed from the south. (Photo by Lyn Topinka. Skamania County, Washington. October 9, 1980. #1:/Pringle P.J. Collection-Mount St. Helens*msh1983/cvof0023 ID. CVO-F. 23ct Gas and ash emission from snow-covered Mount St. Helens, viewed from the northwest from the pumice plain. Photo by Pat Pringle. Skamania County, Washington. April 16, 1983. #1:/Topinka L. Collection-Mount St. Helens*msh1983/cvof0027 ID. CVO-F. 27ct Gas and ash emission from Mount St. Helens, viewed from the north, with geologist in foreground with monitoring equipment. Photo by Lyn Topinka. Skamania County, Washington. April 6, 1983. #1:/Mount Rainier National Park/cvof0034 ID. CVO-F. 34ct Mount Rainier National Park, Washington. Snow-covered Mount Rainier. Photo by L. Topinka. September 1977. #1:/Topinka L. Collection-Mount St. Helens*msh198009/cvof0038 ID. CVO-F. 38ct USGS scientist Brian Drost examining mudline left by lahar along Toutle River near Interstate 5 bridge, Castle Rock. (Photo by Lyn Topinka. Cowlitz County, Washington. September 30, 1980. #1:/Topinka L. Collection-Mount St. Helens*msh198010/cvof0039 ID. CVO-F. 39ct USGS scientist measuring mudflow line at Muddy River, east of Mount St. Helens, near bridge. Compare height of mudlines with height of scientist at right. (Photo by Lyn Topinka. Skamania County, Washington. October 12, 1980. Page 109, lower photo, U.S. Geological Survey Earthquake Information Bulletin, v. 16, no.2, March-April 1984. #1:/Topinka L. Collection-Mount St. Helens*msh198010/cvof0040 ID. CVO-F. 40ct "Bayonet" trees bent and stripped by the May 18, 1980, eruption of Mount St. Helens. (Photo by Lyn Topinka. Skamania County, Washington. October 23, 1980. #1:/Topinka L. Collection-Mount St. Helens*msh198009/cvof0041 ID. CVO-F. 41ct Ruins of one of a number of Muddy River bridges destroyed by the May 18, 1980, eruption of Mount St. Helens. Photo by Lyn Topinka. Skamania County, Washington. September 23, 1980. #1:/Topinka L. Collection-Mount St. Helens*msh198009/cvof0042 ID. CVO-F. 42ct Newly incised drainage channel in the Mount St. Helens blast zone, on Smith Creek. In 1980 this drainage channel was approximately 80 feet wide and 20 feet deep. One year later, in 1981, the drainage channel was approximately 200 feet wide and 36 feet deep. Note the remains of trees in the channel and people for scale near center of view. Photo by Lyn Topinka. Skamania County, Washington. September 1980. Page 109, upper photo, U.S. Geological Survey Earthquake Information Bulletin, v. 16, no.2, March-April 1984. #1:/Martinson H.A. Collection-Mount St. Helens*msh198005m/cvof0043 ID. CVO-F. 43ct Erosion along bank of Smith Creek(?) during first heavy rains after the May 18, 1980, eruption of Mount St. Helens. Photo by Holly A. Martinson. Skamania County, Washington. November 6, 1980. #1:/Martinson H.A. Collection-Mount St. Helens*msh198011/cvof0044 ID. CVO-F. 44ct Surge of flood water coming down Smith Creek blast zone during first major rain after the May 18, 1980, eruption of Mount St. Helens. Photo by Holly A. Martinson. Skamania County, Washington. November 6, 1980. #1:/Topinka L. Collection-Mount St. Helens*msh198010/cvof0046 ID. CVO-F. 46ct Lahar surface of the Upper Muddy River fan, east of Mount St. Helens. Photo by Lyn Topinka. Skamania County, Washington. October 24, 1980. #1:/Topinka L. Collection-Mount St. Helens*msh198010/cvof0047 ID. CVO-F. 47ct Comparative view, one year later, of lahar surface of the Upper Muddy River fan, east of Mount St. Helens. Effects of erosion visible. Photo by Lyn Topinka. Skamania County, Washington. October 10, 1981. #1:/Topinka L. Collection-Mount St. Helens*msh198010/cvof0048 ID. CVO-F. 48ct Oblique aerial view of confluence of Muddy River and Smith Creek, east of Mount St. Helens, before heavy rains. (Photo by Lyn Topinka. Skamania County, Washington. October 28, 1980. #1:/Topinka L. Collection-Mount St. Helens*msh1981/cvof0049 ID. CVO-F. 49ct Oblique aerial view of confluence of Muddy River and Smith Creek, east of Mount St. Helens, after heavy rains. (Photo by Lyn Topinka. Skamania County, Washington. January 14, 1981. #1:/Pringle P.J. Collection-Mount St. Helens*msh1982/cvof0053 ID. CVO-F. 53ct USGS Water Resources Division scientists using airboat for cross-section measurements on the Toutle River. Photo by Pat Pringle. Cowlitz County, Washington. October 1982. #1:/Topinka L. Collection-Mount St. Helens*msh1981/cvof0054 ID. CVO-F. 54ct USGS Water Resources Division scientists stream gaging in the Toutle River, near town of Tower. (Photo by Lyn Topinka. Cowlitz County, Washington. December 5, 1981. Portion of black and white photo published as right photo, page 115, in U.S. Geological Survey. Earthquake information bulletin, v. 16, no.2. March-April 1984. #1:/Mount St. Helens*msh1982/cvof0055 ID. CVO-F. 55ct USGS Water Resources Division scientists taking sediment samples in the Cowlitz River at Castle Rock. Photo by Terry Leighley. Cowlitz County, Washington. February 20, 1982. Black and white photo published as lower photo, pages 114-115, in U.S. Geological Survey. Earthquake information bulletin, v. 16, no.2. March-April 1984. #1:/Topinka L. Collection-Mount St. Helens*msh1982/cvof0056 ID. CVO-F. 56ct Scientist Al Onions taking suspended sediment samples along Highway 99 near Castle Rock. (Photo by Lyn Topinka. Cowlitz County, Washington. December 5, 1982. Black and white photo published as upper photo, p. 115 in U.S. Geological Survey. Earthquake information bulletin, v. 16, no.2. March-April 1984. #1:/Topinka L. Collection-Mount St. Helens*msh1981/cvof0057 ID. CVO-F. 57ct Dredging on the Cowlitz River. View taken from the middle of the river looking towards the bank, dredge spoils piled up in the background. Note USGS survey crew on the bank for scale. (Photo by Lyn Topinka. Cowlitz County, Washington. February 4, 1981. #1:/Topinka L. Collection-Mount St. Helens*msh198005m/cvof0058 ID. CVO-F. 58ct Oblique aerial view of Spirit Lake with Mount Rainier in the background. On May 18, 1980, part of the Mount St. Helens debris avalanche slid into Spirit Lake, raising its level nearly 60 meters and damming its natural outlet to a higher level. Water displaced by the avalanche surged up the surrounding hill slopes, washing the blown-down timber from the lateral blast into the lake. Water currently is being pumped out of Spirit Lake to prevent it from overtopping its dam. (Photo by Lyn Topinka. Skamania County, Washington. Pages 112-113, upper photo, U.S. Geological Survey Earthquake Information Bulletin, v. 16, no.2, March-April 1984. #1:/Topinka L. Collection-Mount St. Helens*msh198011/cvof0059 ID. CVO-F. 59ct Oblique aerial view of the Corps of Engineers Spirit Lake Pump Station, built in 1982 as a temporary means to lower the level of Spirit Lake, north of Mount St. Helens. Photo by Lyn Topinka. Skamania County, Washington. November 2, 1982. #1:/Topinka L. Collection-Mount St. Helens*msh198011/cvof0060 ID. CVO-F. 60ct The avalanche debris filling the North Fork Toutle River Valley consists of unconsolidated, poorly sorted volcanic debris. Approximately 60 square kilometers of valley were buried to an average depth of 45 meters and as much as 180 meters near Spirit Lake. (Photo by Lyn Topinka. Cowlitz County, Washington. November 30, 1983. #1:/Topinka L. Collection-Mount St. Helens*msh198005m/cvof0061 ID. CVO-F. 61ct Oblique aerial view of Coldwater Lake, which resulted when the debris avalanche of May 18, 1980, filled the Toutle River Valley, damming a side channel. (Photo by Lyn Topinka. Skamania and Cowlitz Counties, Washington. October 12, 1983. #1:/Mount St. Helens*msh1982/cvof0063 ID. CVO-F. 63ct Early warning gage, downstream from Spirit Lake, in the vicinity of Mount St. Helens. (Photo by Lyn Topinka. Skamania County, Washington. December 4, 1982. #1:/Topinka L. Collection-Mount St. Helens*msh1982/cvof0064 ID. CVO-F. 64ct USGS Water Resources Division Coldwater Lake Exit early earning flood gage on Coldwater Lake. Mount St. Helens in background. (Photo by Lyn Topinka. Skamania County, Washington. 1982. #1:/Topinka L. Collection-Mount St. Helens*msh1980/cvof0066 ID. CVO-F. 66ct Near view of rain gage set up on the pumice plain near Mount St. Helens. A network of weighing bucket and tipping bucket rain gages was set up in 1980 around Castle, Coldwater, and Spirit Lakes to assess rainfall patterns around Mount St. Helens. The information is used to help assess lake levels and fill. Some data are telemetered back to Vancouver, Washington; other gages are serviced manually once a month. Photo by Lyn Topinka. Skamania County, Washington. October 15, 1981. Page 121, right photo, U.S. Geological Survey Earthquake Information Bulletin, v. 16, no.2, March-April 1984. #1:/Mount St. Helens*msh1983/cvof0067 ID. CVO-F. 67ct "Piping" through the Mount St. Helens debris avalanche. Geologist for scale. Photo by Harry Glicken. Skamania County, Washington. October 1, 1983. #1:/Topinka L. Collection-Mount St. Helens*msh198009/cvof0068 ID. CVO-F. 68ct Tree blowdown on Smith Creek, northeast of Mount St. Helens. Note two people in lower right for scale. Skamania County, Washington. Photo by Lyn Topinka. September 24, 1980. Page 107, lower photo, U.S. Geological Survey Earthquake Information Bulletin, v. 16, no.2, March-April 1984. #1:/Topinka L. Collection-Mount St. Helens*msh198008/cvof0069 ID. CVO-F. 69ct Oblique aerial view of phreatic explosion pit. Note erosion and fill. (Photo by Lyn Topinka. Skamania or Cowlitz Counties, Washington. August 1980. #1:/Topinka L. Collection-Mount St. Helens*msh1983/cvof0070 ID. CVO-F. 70ct Oblique aerial view of phreatic explosion pit after erosion and fill. Note scientists for scale. Photo by Lyn Topinka. Skamania or Cowlitz County, Washington. October 1983. #1:/Leighley T. Collection-Mount St. Helens/cvof0073 ID. CVO-F. 73ct USGS scientist Pete Rowley sampling a day-old pyroclastic flow near Mount St. Helens. Photo by Terry Leighley. Skamania County, Washington. October 17, 1980. #1:/Leighley T. Collection-Mount St. Helens*msh198010/cvof0074 ID. CVO-F. 74ct Mount St. Helens outer deformation network. View from Clearcut, south side of Mount St. Helens. Geologists and equipment in foreground. Photo by Terry Leighley. Skamania County, Washington. October 1, 1980. #1:/Topinka L. Collection-Mount St. Helens*msh1981/cvof0076 ID. CVO-F. 76ct Scientists measuring pressure and air temperature in Mount St. Helens' crater during EDM measurements from Harrys Ridge. (Photo by Lyn Topinka. Skamania County, Washington. August 1981. #1:/Leighley T. Collection-Mount St. Helens*msh1982/cvof0079 ID. CVO-F. 79ct Deformation monitoring setup near dome in Mount St. Helens' crater. Geologists and equipment in foreground. Photo by Terry Leighley. Skamania County, Washington. April 23, 1982. #1:/Topinka L. Collection-Mount St. Helens*msh1982/cvof0080 ID. CVO-F. 80ct USGS scientists making deformation measurements, north side of Mount St. Helens dome. Geologists and equipment in foreground. Photo by Lyn Topinka. Skamania County, Washington. August 17, 1982. Pages 9091, U.S. Geological Survey Earthquake Information Bulletin, v. 16, no.2, March-April 1984. #1:/Topinka L. Collection-Mount St. Helens*msh1981/cvof0082 ID. CVO-F. 82ct Scientists installing targets and prism reflectors on Mount St. Helens dome. Photo by Lyn Topinka. Skamania County, Washington. May 12, 1981. #1:/Topinka L. Collection-Mount St. Helens*msh198010/cvof0083 ID. CVO-F. 83ct USGS scientist sampling material from new lobe on Mount St. Helens dome. Scientist provides scale. Photo by Terry Leighley. Skamania County, Washington. October 22, 1980. #1:/Topinka L. Collection-Mount St. Helens*msh1983/cvof0084 ID. CVO-F. 84ct USGS scientists studying Mount St. Helens dome. Note scientists, in orange in lower left, as compared to dome. Photo by Lyn Topinka. Skamania County, Washington. May 26, 1983. #1:/Topinka L. Collection-Mount St. Helens*msh1981/cvof0087 ID. CVO-F. 87ct USGS scientists leveling around Mount St. Helens dome. Repeated leveling circuits around the dome have been performed to determine possible changes of the crater floor before eruptions. Photo by Lyn Topinka. Skamania County, Washington. November 6, 1981. Page 77, U.S. Geological Survey Earthquake Information Bulletin, v. 16, no.2, March-April 1984. #1:/Topinka L. Collection-Mount St. Helens*msh1981/cvof0091 ID. CVO-F. 91ct Scientists and strain gage setup. Mount St. Helens dome in background. Photo by Terry Leighley. Skamania County, Washington. August 11, 1981. #1:/Topinka L. Collection-Mount St. Helens*msh1981/cvof0092 ID. CVO-F. 92ct USGS scientists sampling gases in a fumarole near Mount St. Helens dome. Skamania County, Washington. 1981. #1:/Leighley T. Collection-Mount St. Helens*msh198009/cvof0093 ID. CVO-F. 93ct Gas sampling from radial crack in Mount St. Helens dome. Photo by Terry Leighley. Skamania County, Washington. September 25, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh1981/cvof0094 ID. CVO-F. 94ct USGS scientists working at hydrogen sampling site, South Ridge, on the south flank of Mount St. Helens. Snow-covered Mt. Adams in the background. Photo by Tom Casadevall. Skamania County, Washington. March 6, 1981. #1:/Leighley T. Collection-Mount St. Helens*msh198009/cvof0096 ID. CVO-F. 96ct USGS scientist measuring temperature of radial crack in Mount St. Helens dome -838 degrees C. Photo by Terry Leighley. Skamania County, Washington. September 25, 1980. #1:/Leighley T. Collection-Mount St. Helens*msh198009/cvof0097 ID. CVO-F. 97ct Radial crack on northeast side of Mount St. Helens dome. Photo by Terry Leighley. Skamania County, Washington. September 17, 1980. #1:/Topinka L. Collection-Mount St. Helens*msh1981/cvof0100 ID. CVO-F. 100ct Mount St. Helens crater deformation. USGS scientists measuring small thrust fault. Photo by Lyn Topinka. Skamania County, Washington. May 12, 1981. #1:/Swanson D.A. Collection-Mount St. Helens*msh1982/cvof0101 ID. CVO-F. 101ct Beginning of a thrust fault in Mount St. Helens crater floor - the "Outward Bound" thrust. Photo by Don Swanson. Skamania County, Washington. August 12, 1982. #1:/Swanson D.A. Collection-Mount St. Helens*msh1982/cvof0103 ID. CVO-F. 103ct Near view of beginning of floor deformation of Mount St. Helens. Offset of orange line shows location of deformation. Photo by Don Swanson. Skamania County, Washington. August 1982. #1:/Swanson D.A. Collection-Mount St. Helens*msh1982/cvof0104 ID. CVO-F. 104ct Development of crater floor deformation of Mount St. Helens. Photo by Don Swanson. Skamania County, Washington. August 1982. #1:/U.S. Forest Service Collection-Mount St. Helens*msh1983/cvof0108 ID. CVO-F. 108ct Oblique aerial view of Mount St. Helens before the May 18, 1980, eruption, as seen from Bear Cove, Spirit Lake. Lake visible in foreground. Photo courtesy of U.S. Forest Service. Skamania County, Washington. August 1973. #1:/Miller D.J. Collection-Mount St. Helens*msh198004/cvof0109 ID. CVO-F. 109ct Oblique aerial view of Mount St. Helens with early summit crater. Photo by C. Dan Miller. Skamania County, Washington. April-May, 1980. #1:/Topinka L. Collection-Mount St. Helens*msh1981/cvof0111 ID. CVO-F. 111ct Devastation along the South Fork Tousle River resulting from the May 18, 1980, lahars. Logs and other debris jammed up against house. Photo by Lyn Topinka. Cowlitz County, Washington. July 19, 1981. #1:/Topinka L. Collection-Mount St. Helens*msh198007/cvof0113 ID. CVO-F. 113ct Devastation along the Cowlitz River resulting from the May 18, 1980, lahars. House inundated by mudflow. Photo by Lyn Topinka. Cowlitz County, Washington. July 15, 1980. #1:/Topinka L. Collection-Mount St. Helens*msh198007/cvof0114 ID. CVO-F. 114ct Devastation along the Cowlitz River resulting from the May 18, 1980, lahars. Garage? half-buried by mudflow. Photo by Lyn Topinka. Cowlitz County, Washington. July 15, 1980. #1:/Topinka L. Collection-Mount St. Helens*msh1981/cvof0115 ID. CVO-F. 115ct Corps of Engineers dredging the mud and silt from May 18, 1980, along the North Fork Toutle River. Photo by Lyn Topinka Cowlitz County, Washington. February 5, 1981. #1:/Topinka L. Collection-Mount St. Helens*msh1981/cvof0116 ID. CVO-F. 116ct Dike built from the dredged mud and silt along the Cowlitz River, creating a levee to protect the residents from winter flooding, near Lexington. Photo by Lyn Topinka. Cowlitz County, Washington. March 22, 1981. #1:/Topinka L. Collection-Mount St. Helens*msh198009/cvof0119 ID. CVO-F. 119ct Lahar, from May 18, 1980, which flowed down the Muddy River drainage, southeast flank of Mount St. Helens. Photo by Lyn Topinka. Skamania County, Washington. September 24, 1980. #1:/Topinka L. Collection-Mount St. Helens*msh198010/cvof0120 ID. CVO-F. 120ct View of lahar from May 18, 1980, down the Muddy River drainage, southeast flank of Mount St. Helens. A beheaded Shoestring Glacier is visible on the mountain. Photo by Lyn Topinka. Skamania County, Washington. October 1980. #1:/Topinka L. Collection-Mount St. Helens*msh198011/cvof0121 ID. CVO-F. 121ct Lahar from May 18, 1980, down the South Fork Toutle River drainage, west flank of Mount St. Helens. Photo by Lyn Topinka. Cowlitz County, Washington. October 4, 1980. #1:/Topinka L. Collection-Mount St. Helens*msh198009/cvof0122 ID. CVO-F. 122ct Large boulder carried in lahar flow, Muddy River, east of Mount St. Helens. Geologists for scale. Photo by Lyn Topinka. Skamania County, Washington. September 16, 1980. #1:/Topinka L. Collection-Mount St. Helens*msh1981/cvof0123 ID. CVO-F. 123ct Remains of the Muddy River Bridge along the Muddy River, east of Mount St. Helens. Person at left for scale. Photo by Lyn Topinka. Skamania County, Washington. April 3, 1981. #1:/Topinka L. Collection-Mount St. Helens*msh19808/cvof0124 ID. CVO-F. 124ct Tree blowdown near Elk Rock, 11 miles from Mount St. Helens. (Photo by Lyn Topinka. Cowlitz County, Washington. August 22, 1980. #1:/Topinka L. Collection-Mount St. Helens*msh1981/cvof0125 ID. CVO-F. 125ct Tree blowdown on the South Fork Toutle River showing small stand of trees protected from the force of the blast but not from the heat. Photo by Lyn Topinka. Cowlitz County, Washington. August 14, 1981. #1:/Topinka L. Collection-Mount St. Helens*msh1982/cvof0126 ID. CVO-F. 126ct View along Smith Creek showing tree blowdown, singed trees, and green trees which missed the Mount St. Helens blast. Photo by Lyn Topinka. Skamania County, Washington. April 26, 1982. #1:/Topinka L. Collection-Mount St. Helens*msh1984/cvof0127 ID. CVO-F. 127ct Blast tree stump on Harrys Ridge, five miles (eight kilometers) to the north of Mount St. Helens. Volcano visible in the background. Photo by Lyn Topinka. Skamania County, Washington. May 29, 1984. #1:/Topinka L. Collection-Mount St. Helens*msh1981/cvof0131 ID. CVO-F. 131ct USGS instrument station on Harrys Ridge, five miles (eight kilometers) to the north of Mount St. Helens. Photo by Lyn Topinka. Skamania County, Washington. October 9, 1981. #1:/Topinka L. Collection-Mount St. Helens*msh1981/cvof0132 ID. CVO-F. 132ct USGS radio repeater station on Coldwater Peak, north of Mount St. Helens. Photo by Lyn Topinka. Skamania County, Washington. August 31, 1981. #1:/Topinka L. Collection-Mount St. Helens*msh1983/cvof0133 ID. CVO-F. 133ct Deformation project's outer net Butte camp site, southwest of Mount St. Helens. Geologists at work. Photo by Lyn Topinka. Skamania County, Washington. July 11, 1983. #1:/Topinka L. Collection-Mount St. Helens*msh1983/cvof0134 ID. CVO-F. 134ct Deformation project's outer net Clearcut site, south of Mount St. Helens. Geologists at work. Photo by Lyn Topinka. Skamania County, Washington. July 11, 1983. #1:/Topinka L. Collection-Mount St. Helens*msh1983/cvof0135 ID. CVO-F. 135ct Deformation project's outer net Muddy River site, southeast of Mount St. Helens. Geologists at work. Photo by Lyn Topinka. Skamania County, Washington. July 11, 1983. #1:/Mount Rainier National Park/cvof0139 ID. CVO-F. 139ct Mount Rainier National Park, Washington. Mount Rainier. Photo by L. Topinka. 1975. #1:/Cashion W.B. Collection/cwb00001 ID. Cashion, W.B. 1 Mined-out area along Rainbow gilsonite vein.T. 11 S., R. 24 E., Uintah County, Utah. 1956. #1:/Cashion W.B. Collection/cwb00002 ID. Cashion, W.B. 2 Mined-out area along Rainbow gilsonite vein.T. 11 S., R. 24 E., Uintah County, Utah. 1956. #1:/Cashion W.B. Collection/cwb00003 ID. Cashion, W.B. 3 Mined-out area along Rainbow gilsonite vein.T. 11 S., R. 24 E., Uintah County, Utah. 1956. #1:/Cashion W.B. Collection/cwb00004 ID. Cashion, W.B. 4 Exposure of vein near the northwest end of Black Dragon.T.12 S., R. 25 E. Hammer for scale. Uintah County, Utah. 1959. #1:/Cashion W.B. Collection/cwb00005 ID. Cashion, W.B. 5 Looking northwest along Cowboy vein.T. 9 S., R. 25 E., Uintah County, Utah. 1959. #1:/Cashion W.B. Collection/cwb00006 ID. Cashion, W.B. 6 Looking southeast along Cowboy vein.T. 9S., R. 25 E., Uintah County, Utah. 1959. #1:/Cedar Breaks National Monument/cwb00043 ID. Cashion, W.B. 43 Cedar Breaks National Monument, Utah. Exposed Wasatch Formation. 1954. #1:/Darien Expedition/dar00001 ID. DARIEN EXPEDITION, 1 Darien Expedition. Wilds of the Isthmus of Darien (Panama). Photo by T.H. O'Sullivan, 1870, or J. Moran, 1871. #1:/Darien Expedition/dar00002 ID. DARIEN EXPEDITION, 2 Darien Expedition. Pinogana on the Tuyra River (Rio Tuira). Photo by J. Moran, 1871. NARA # 77-H-8913S-25. #1:/Darien Expedition/dar00003 ID. DARIEN EXPEDITION, 3 Darien Expedition. Village of Santa Maria del Real. Photo by J. Moran, 1871. NARA # 77-H-8913P-11. #1:/Darien Expedition/dar00004 ID. DARIEN EXPEDITION, 4 Darien Expedition. Turbo Village. Photo by T.H. O'Sullivan, 1870. NARA # 77-H-8913P-22. #1:/Darien Expedition/dar00005 ID. DARIEN EXPEDITION, 5 Darien Expedition. Native house at Turbo. Photo by T.H. O'Sullivan, 1870. NARA # 77-H-8913P-21. #1:/Darien Expedition/dar00006 ID. DARIEN EXPEDITION, 6 Darien Expedition. Native hut near Turbo on the Gulf of Darien (Panama). Photo by T.H. O'Sullivan, 1870. NARA # 77-H-8913P-20 #1:/Darien Expedition/dar00007 ID. DARIEN EXPEDITION, 7 Darien Expedition. Spanish fortress of San Lorenzo in Cartagena, Colombia. Photo by T.H. O'Sullivan, 1870 #1:/Darien Expedition/dar00008 ID. DARIEN EXPEDITION, 8 Darien Expedition. Building with barred windows, probably at Cartagena, Colombia. Photo by T.H. O'Sullivan, 1870. NARA# 77-H-8913P-29. #1:/Darien Expedition/dar00009 ID. DARIEN EXPEDITION, 9 Darien Expedition. Cathedral at Cartagena, Colombia. Photo by T.H. O'Sullivan, 1870. NARA # 77-H-8913P-25. #1:/Darien Expedition/dar00010 ID. DARIEN EXPEDITION, 10 Darien Expedition. Island in Limon Bay or Cupica Bay. Photo by J. Moran, 1871. NARA # 77-H-8913P-5. #1:/Darien Expedition/dar00011 ID. DARIEN EXPEDITION, 11 Darien Expedition. Islands in Cupica Bay. Photo by J. Moran, 1871. #1:/Darien Expedition/dar00012 ID. DARIEN EXPEDITION, 12 Darien Expedition. Darien Harbor, looking south. Photo by J. Moran, 1871. NARA # 77-H-8913P-10. #1:/Darien Expedition/dar00013 ID. DARIEN EXPEDITION, 13 Darien Expedition. Terminus of the proposed canal at Limon Bay. Photo by J. Moran, 1871. NARA# 77-H-8913P-6. #1:/Darien Expedition/dar00014 ID. DARIEN EXPEDITION, 14 Darien Expedition. Mango tree near Pinogana. Photo by J. Moran, 1871. NARA # 77-H-8913P-26. #1:/Darien Expedition/dar00015 ID. DARIEN EXPEDITION, 15 Darien Expedition. Martyr tree and ruin of an old fort at Santa Maria del Real. Photo by J. Moran, 1871. NARA # 77-H-8913P-27. #1:/Darien Expedition/dar00016 ID. DARIEN EXPEDITION, 16 Darien Expedition. Chipigana on Darien Harbor. Photo by J. Moran, 1871. NARA # 77-H-8913P-13. #1:/Darien Expedition/dar00017 ID. DARIEN EXPEDITION, 17 Darien Expedition. Limon Bay. Photo by J. Moran, 1871. NARA # 77-H-8913P-2. #1:/Darien Expedition/dar00018 ID. DARIEN EXPEDITION, 18 Darien Expedition. USS Nipsic in Limon Bay. Photo by J. Moran, 1871. NARA # 77-H-8913P-9. #1:/Darien Expedition/dar00019 ID. DARIEN EXPEDITION, 19 Darien Expedition. Landing at Chipigana. Photo by J. Moran, 1871. NARA # 77-H-8913P-14. #1:/Darien Expedition/dar00020 ID. DARIEN EXPEDITION, 20 Darien Expedition. Cliff on the Pacific coast above Limon Bay. Photo by J. Moran, 1871. NARA# 77-H-8913P-7. #1:/Darien Expedition/dar00021 ID. DARIEN EXPEDITION, 21 Darien Expedition. Natural arch at Cupica Bay. Photo by J. Moran, 1871. NARA # 77-H-8913P-28. #1:/Darien Expedition/dar00022 ID. DARIEN EXPEDITION, 22 Darien Expedition. Path near Chipigana. Photo by J. Moran, 1871. NARA # 77-H-8913P-17. #1:/Darien Expedition/dar00023 ID. DARIEN EXPEDITION, 23 Darien Expedition. Tropical forest. Photo by T.H. O'Sullivan, 1870, or J. Moran, 1871. #1:/Darien Expedition/dar00024 ID. DARIEN EXPEDITION, 24 Darien Expedition. Forest near Turbo. Photo by T.H. O'Sullivan, 1870. NARA# 77-H-8913P-23. #1:/Darien Expedition/dar00025 ID. DARIEN EXPEDITION, 25 Darien Expedition. Gorge in the tropical forest near Chipigana. Photo by J. Moran, 1871. NARA# 77-H-8913P-15. #1:/Darien Expedition/dar00026 ID. DARIEN EXPEDITION, 26 Darien Expedition. Great falls on the Limon River. Photo by J. Moran, 1871. NARA# 77-H-8913P-4. #1:/Darien Expedition/dar00027 ID. DARIEN EXPEDITION, 27 Darien Expedition. Cascade on the Limon River. Photo by J. Moran, 1871. NARA # 77-H-8913P-3. #1:/Darien Expedition/dar00028 ID. DARIEN EXPEDITION, 28 Darien Expedition. Brook El Bano (El Banco?) at Chipigana. Photo by J. Moran, 1871. NARA# 77-H-8913P-16. #1:/Darien Expedition/dar00029 ID. DARIEN EXPEDITION, 29 Darien Expedition. Limon River below the falls of Quebrada del Mar at Limon Bay. Photo by J. Moran, 1871. NARA # 77-H-78913P-8. #1:/Yellowstone National Park/dce00165 ID. Dobbin, C.E. 165 Yellowstone National Park, Wyoming. Black Growler Geyser in Norris Geyser Basin(?). 1924. #1:/Yellowstone National Park/dce00167 ID. Dobbin, C.E. 167 Yellowstone National Park, Wyoming. Tourist camping scene. 1924. #1:/Mesa Verde National Park/dch00007 ID. Dane, C.H. 7 Mesa Verde National Park, Colorado. Square Tower House, a cliff dwelling under an overhanging edge of Cliff House Sandstone Member of Mesa Verde Formation. June 1924. See also photo dch00009. #1:/Mesa Verde National Park/dch00008 ID. Dane, C.H. 8 Mesa Verde National Park, Colorado. Square Tower House. June 1924. #1:/Mesa Verde National Park/dch00009 ID. Dane, C.H. 9 Mesa Verde National Park, Colorado. Square Tower House, viewed from a position slightly to the left of photo dch00007, under an overhanging edge of Cliff House Sandstone Member of Mesa Verde Formation. June 1924. #1:/Mesa Verde National Park/dch00010 ID. Dane, C.H. 10 Mesa Verde National Park, Colorado. Looking across the canyon at Little Long House. The overhanging ledge is Cliff House Sandstone Member of Mesa Verde Formation. June 1924. #1:/Mesa Verde National Park/dch00012 ID. Dane, C.H. 12 Mesa Verde National Park, Colorado. Cross-canyon view of Oak Tree House. Overhanging ledge is Cliff House Sandstone Member of Mesa Verde Formation. June 1924. #1:/Mesa Verde National Park/dch00013 ID. Dane, C.H. 13 Mesa Verde National Park, Colorado. Sun Temple built on Cliff House Sandstone Member of Mesa Verde Formation. June 1924. #1:/Mesa Verde National Park/dch00015 ID. Dane, C.H. 15 Mesa Verde National Park, Colorado. Sun Temple with tourists in the background. June 1924. #1:/Mesa Verde National Park/dch00016 ID. Dane, C.H. 16 Mesa Verde National Park, Colorado. Inscriptions on rocks at Sun Temple. June 1924. #1:/Mesa Verde National Park/dch00017 ID. Dane, C.H. 17 Mesa Verde National Park, Colorado. Entrance into Sun Temple. June 1924. #1:/Mesa Verde National Park/dch00018 ID. Dane, C.H. 18 Mesa Verde National Park, Colorado. Cliff Palace is the largest cliff dwelling. The ledge is Cliff House Sandstone Member of Mesa Verde Formation. June 1924. #1:/Mesa Verde National Park/dch00019 ID. Dane, C.H. 19 Mesa Verde National Park, Colorado. Cliff Palace. June 1924. #1:/Mesa Verde National Park/dch00020 ID. Dane, C.H. 20 Mesa Verde National Park, Colorado. Cliff Palace. June 1924. #1:/Mesa Verde National Park/dch00021 ID. Dane, C.H. 21 Mesa Verde National Park, Colorado. Cliff Palace. June 1924. #1:/Mesa Verde National Park/dch00022 ID. Dane, C.H. 22 Mesa Verde National Park, Colorado. Cliff Palace. June 1924. #1:/Mesa Verde National Park/dch00023 ID. Dane, C.H. 23 Mesa Verde National Park, Colorado. Kiva at Cliff Palace. June 1924. #1:/Mesa Verde National Park/dch00024 ID. Dane, C.H. 24 Mesa Verde National Park, Colorado. Entrance to Balcony House. June 1924. #1:/Mesa Verde National Park/dch00025 ID. Dane, C.H. 25 Mesa Verde National Park, Colorado. Defense wall near the entrance to Balcony House. June 1924. #1:/Mesa Verde National Park/dch00026 ID. Dane, C.H. 26 Mesa Verde National Park, Colorado. Balcony House, viewed from the north. Overhanging ledge is Cliff House Sandstone Member of Mesa Verde Formation. June 1924. #1:/Mesa Verde National Park/dch00027 ID. Dane, C.H. 27 Mesa Verde National Park, Colorado. Balcony in Balcony House. June 1924. #1:/Mesa Verde National Park/dch00028 ID. Dane, C.H. 28 Mesa Verde National Park, Colorado. North end of Point lookout Sandstone, lowest member of the Mesa Verde Formation, caps the cliff. Mancos Shale crops out below. June 1924. #1:/Grand Canyon National Park/dch00044 ID. Dane, C.H. 44 Grand Canyon National Park, Arizona. El Tovar Hotel on the distant rim. Kaibab Limestone shows the trail to the river. July 1924. #1:/Grand Canyon National Park/dch00045 ID. Dane, C.H. 45 Grand Canyon National Park, Arizona. Coconino Sandstone on Supai red beds, viewed from the trail to the Colorado River from the El Tovar Hotel. Shows roughly vertical jointing in the sandstone. Cross-bedding is brought out by weathering along the bedding planes near the center. July 1924. #1:/Grand Canyon National Park/dch00046 ID. Dane, C.H. 46 Grand Canyon National Park, Arizona. Inner gorge of the Colorado River at the foot of the trail from El Tovar. July 1924. #1:/Grand Canyon National Park/dch00047 ID. Dane, C.H. 47 Grand Canyon National Park, Arizona. Fault near the inner gorge of the Colorado River, viewed from El Tovar Trail. Archean schists overlain by Algonkian beds. July 1924. #1:/Grand Canyon National Park/dch00048 ID. Dane, C.H. 48 Grand Canyon National Park, Arizona. Canyon wall, viewed from Indian Gardens. At the top Kaibab Limestone; massive white beds are Coconino Sandstone, below which are Supai red beds. The lower massive ledge is Redwall Limestone which crops out also in the upper right. July 1924. #1:/Canyon de Chelly National Monument/dch00054 ID. Dane, C.H. 54 Canyon de Chelly National Monument, Arizona. Walls of Permian De Chelly Sandstone capped by Triassic Shinarump Conglomerate and Sandstone. July 1924. #1:/Canyon de Chelly National Monument/dch00055 ID. Dane, C.H. 55 Canyon de Chelly National Monument, Arizona. Walls of Permian De Chelly Sandstone capped by Triassic Shinarump Conglomerate and Sandstone in a side canyon of De Chelly. July 1924. #1:/Canyon de Chelly National Monument/dch00056 ID. Dane, C.H. 56 Canyon de Chelly National Monument, Arizona. White House cliff dwelling in an alcove at lower right. Walls of Permian De Chelly Sandstone capped by Triassic Shinarump Conglomerate and Sandstone. July 1924. #1:/Canyon de Chelly National Monument/dch00058 ID. Dane, C.H. 58 Canyon de Chelly National Monument, Arizona. Walls of Permian De Chelly Sandstone capped by Triassic Shinarump Conglomerate and Sandstone. #1:/Canyon de Chelly National Monument/dch00060 ID. Dane, C.H. 60 Canyon de Chelly National Monument, Arizona. Walls of Permian Sandstone capped by Triassic Shinarump Conglomerate and Sandstone. July 1924. Photos dch00060 and dch00061 form a panorama. #1:/Canyon de Chelly National Monument/dch00061 ID. Dane, C.H. 61 Canyon de Chelly National Monument, Arizona. Walls of Permian Sandstone capped by Triassic Shinarump Conglomerate and Sandstone. Cowboy herding cattle and wagon road near the right edge of the sand wash flat. July 1924. Photos dch00060 and dch00061 form a panorama. #1:/Canyon de Chelly National Monument/dch00062 ID. Dane, C.H. 62 Canyon de Chelly National Monument, Arizona. Walls of Permian Sandstone capped by Triassic Shinarump Conglomerate and Sandstone. Cowboy and horses(?) on the left edge of the sand wash flat. July 1924. #1:/Canyon de Chelly National Monument /dch00063 ID. Dane, C.H. 63 Canyon de Chelly National Monument, Arizona. Wall of Canyon de Chelly. The rider is only half way across the sand wash flat. #1:/Canyon de Chelly National Monument /dch00064 ID. Dane, C.H. 64 Canyon de Chelly National Monument, Arizona. Cliff dwelling and cross-bedded Permian De Chelly Sandstone. July 1924. #1:/Canyon de Chelly National Monument /dch00065 ID. Dane, C.H. 65 Canyon de Chelly National Monument, Arizona. Cliff dwelling and cross-bedded Permian De Chelly Sandstone. Alcoves were produced by weathering of cross- bedded sandstone. #1:/Canyon de Chelly National Monument /dch00066 ID. Dane, C.H. 66 Canyon de Chelly National Monument, Arizona. Erosion forms in cross-bedded Permian De Chelly Sandstone. July 1924. #1:/Canyon de Chelly National Monument /dch00067 ID. Dane, C.H. 67 Canyon de Chelly National Monument, Arizona. White House cliff dwelling, viewed from the opposite wall of the canyon. Cross-bedding of Permian De Chelly Sandstone. Termination of part of the heavy band above and to the right of the dwelling at the base of a sandstone bed shows possible entry of water into the cliff, causing formation of the alcove. Vertical streaking is caused by water trickling over the sides of the canyon. July 1924. #1:/Canyon de Chelly National Monument /dch00068 ID. Dane, C.H. 68 Canyon de Chelly National Monument, Arizona. White House cliff dwelling. Cross-bedding of Permian De Chelly Sandstone and alcove occurring at the base of the sandstone unit. July 1924 #1:/Arches National Park/dch00209 ID. Dane, C.H. 209 Arches National Park, Utah. Double Arch in Entrada Sandstone. The arches rest on the Carmel Formation, west side of Elephant Butte, 3.5 miles west of south of Turnbow's cabin on Salt Wash and 2 miles northwest of the junction of Salt Wash and the Colorado River. Photo by O.R. Murphy, July 1927. #1:/Arches National Park/dch00210 ID. Dane, C.H. 210 Arches National Park, Utah. One arch of Double Arch in Entrada Sandstone. The arch rests on the Carmel Formation, west side of Elephant Butte, 3.5 miles west of south of Turnbow's cabin on Salt Wash and 2 miles northwest of the junction of Salt Wash and the Colorado River. Photo by O.R. Murphy, July 1927. #1:/Arches National Park/dch00211 ID. Dane, C.H. 211 Arches National Park, Utah. Geologist using a plane table beneath North Window Arch. View is south. Photo by M.O. McKnight, July 1927. #1:/Arches National Park/dch00213 ID. Dane, C.H. 213 Arches National Park, Utah. Northward through North Window Arch. July 1927. #1:/Arches National Park/dch00214 ID. Dane, C.H. 214 Arches National Park, Utah. Northeastward through North Window Arch. Photo by O.R. Murphy, July 1927. #1:/Arches National Park/dch00215 ID. Dane, C.H. 215 Arches National Park, Utah. North side base of North Window Arch. Photo by M.O. McKnight, July 1927. #1:/Dane C.H. Collection-Keystone Metals Reduction Company/dch00375 ID. Dane, C.H. 375 Abandoned uranium ore treating plant of Keystone Metals Reduction Company on Polar Mesa. The pool in the foreground is run-off held by an earth dam. Grand County, Utah. July 1929. #1:/Mount Rainier National Park/dcl00010 ID. Driedger, C.L. 10 Mount Rainier National Park, Washington. Mount Rainier, viewed from the west. Each volcano provides a high mountain environment on which glaciers exist and which is, in turn, eroded by forces associated with glaciation. Cover, U.S. Geological Survey Professional Paper 1365. #1:/Coal Mine Subsidence/dcr00006 ID. Dunrud, C.R. 6cp Coal Mine Subsidence near Sheridan, Wyoming. Surface subsidence effects above abandoned coal mines 10 to 15 kilometers north of Sheridan. Subsidence depressions and pits above the Old Monarch Mine in operation from 1904 to 1921. Rectangular depressions, some of which are bounded by pits, are evident on the right. Some of the pits are sealed at the bottom and provide sufficient moisture to support trees (foreground). Overburden thickness is estimated to be approximately 10 to 15 meters. The depressions occur where much of the coal is removed and the remaining coal cannot support the weight of the overburden. Pits at the margins of the depressions commonly are caused by piping failure and the local flow of surface water to underground mines via subsidence cracks. May 1978. Frontispiece A, Geological Survey Professional Paper 1164. #1:/Coal Mine Subsidence/dcr00007 ID. Dunrud, C.R. 7cp Coal Mine Subsidence near Sheridan, Wyoming. Surface subsidence effects above abandoned coal mines 10 to 15 kilometers north of Sheridan. Subsidence pits and troughs above the Dietz Coal Mines in operation from the 1890's to the 1920's. Coal was mined from three different beds. The mine workings, which were abandoned in the early 1920's, are locally superimposed. The overburden comprises weak claystones, shales and local thin, soft sandstones. Its thickness is estimated to range from 5 meters along the margins of the subsidence area to as much as 45 meters. Pits and troughs located in draws draining into Goose Creek disrupt or divert surface water to old mine workings. The Bighorn Mountains are in the far background. October 1976. Frontispiece B, U.S. Geological Survey Professional Paper 1164. #1:/Coal Mine Subsidence/dcr00011 ID. Dunrud, C.R. 11cp Coal Mine Subsidence near Sheridan, Wyoming. Subsidence depressions, pits, and cracks above the south part of the abandoned room-and-pillar Acme Mine. The mine was operated from the early 1900's to 1943. The location and geometry of subsidence depressions and pits correspond to mining areas and to individual mine openings. Subsidence depressions containing pits and bounded by tension cracks. Pits of markedly different ages are present, ranging from bowl-like depressions blanketed by green grass, many years or decades old, to small pits with vertical or overhanging walls, only a few months or years old. Subsidence depressions, pits, and cracks occur sporadically in the road in the left foreground and present problems to stock and vehicle travel. May 1976. Figure 7-B, U.S. Geological Survey Professional Paper 1164. #1:/Davidson E.S. Collection-Black Widow Prospect/des00019 ID. Davidson, E.S. 19 Black Widow prospect in typical channel filled with the Shinarump Member of the Chinle Formation; Moenkopi Formation and Shinarump Member of the Chinle Formation. Garfield County, Utah. ca. 1956. Figure 17-B in U.S. Geological Survey. Bulletin 1229. 1967. #1:/Davis J.A. Collection-Dutton and Halsey's Mine/dja00001 ID. Davis, J.A. 1 Tipple at Dutton and Halsey's Mine looking toward the mine. Shows means for separating two grades of coal. Rifle. Garfield County, Colorado. 1908. #1:/Davis J.A. Collection-Grey Mine/dja00028 ID. Davis, J.A. 28 Tipple at Grey Mine near Vernal, Uintah County, Utah.n.d. #1:/Diller J.S. Collection/djs00081 ID. Diller, J.S. 81 Fragmental rocks forming talus on the north side of the canyon of Mud Creek above timber line. Siskiyou County, California.n.d. #1:/Lassen Volcanic National Park/djs00208 ID. Diller, J.S. 208 Lassen Volcanic National Park, California. Lassen Peak, viewed from near Bumpass Hell. Between 1885 and 1915. #1:/Lassen Volcanic National Park/djs00209 ID. Diller, J.S. 209 Lassen Volcanic National Park, California. Volcanic neck of Lassen Peak, viewed from the southwestern slope of Lassen Peak. Between 1885 and 1915. #1:/Lassen Volcanic National Park/djs00212 ID. Diller, J.S. 212 Lassen Volcanic National Park, California. Differentiation nodules in the lavas on the southern slope of Lassen Peak. Between 1885 and 1915. #1:/Lassen Volcanic National Park/djs00214 ID. Diller, J.S. 214 Lassen Volcanic National Park, California. Bumpass Hell near Lassen Peak. Between 1885 and 1915. #1:/Lassen Volcanic National Park/djs00216 ID. Diller, J.S. 216 Lassen Volcanic National Park, California. Lassen Peak, viewed from the southwest near Manzanita Lake. On the left in the distance is the mass called Chaos. It is the material last erupted from the slopes of Lassen Peak. Pre-1914. #1:/Lassen Volcanic National Park/djs00218 ID. Diller, J.S. 218 Lassen Volcanic National Park, California. Head of Mill Creek, viewed from near Morgan's Springs. Lassen Peak is on the right in the distance. Suppan Mountain is on the left. The open space in the middle ground is Morgan's Springs. Between 1885 and 1915. #1:/Lassen Volcanic National Park/djs00222 ID. Diller, J.S. 222 Lassen Volcanic National Park, California. Lassen Peak, viewed from Butte Mountain. Between 1885 and 1915. #1:/Lassen Volcanic National Park/djs00227 ID. Diller, J.S. 227 Lassen Volcanic National Park, California. Northwest slope of Lassen Peak, viewed from Chaos. Between 1885 and 1915. #1:/Lassen Volcanic National Park/djs00228 ID. Diller, J.S. 228 Lassen Volcanic National Park, California. Chaos, viewed from the northwest slope of Lassen Peak. Between 1885 and 1915. #1:/Lassen Volcanic National Park/djs00235 ID. Diller, J.S. 235 Lassen Volcanic National Park, California. Recent lava flow down Hat Creek. Hat Creek Hill in the distance. Between 1885 and 1915. #1:/Lassen Volcanic National Park/djs00242 ID. Diller, J.S. 242 Lassen Volcanic National Park, California. Model of lava field and the Cinder Cone, looking northwest across Snag Lake. Circa 1890. Figure 1, U.S. Geological Survey Bulletin 79. #1:/Lassen Volcanic National Park/djs00245 ID. Diller, J.S. 245 Lassen Volcanic National Park, California. Cinder Cone near Lassen Peak, looking northward. The smooth, steep slopes of the cone rise behind the tabular coulee of the lava, which is composed of angular masses. The cone consists of volcanic ashes, which also cover the surface of the lava field and the surrounding slopes. The dead tree in the foreground grew before the eruptions from the cone occurred. The forest in the distance has sprung up since they occurred. Circa 1890. Figure 4, U.S. Geological Survey Folio 15; Plate 3, U.S. Geological Survey Bulletin 79; Plate 159-B, U.S. Geological Survey Professional Paper 60. See also photo djs00246. #1:/Lassen Volcanic National Park/djs00246 ID. Diller, J.S. 246 Lassen Volcanic National Park, California. Cinder Cone and part of the lava field tem miles northeast of Lassen Peak. Circa 1890. Closer and slightly to right of photo djs00245. #1:/Lassen Volcanic National Park/djs00247 ID. Diller, J.S. 247 Lassen Volcanic National Park, California. Cinder Cone, looking west. Older and newer lava in the foreground. Circa 1890. Plate 9, U.S. Geological Survey Bulletin 79. #1:/Lassen Volcanic National Park/djs00248 ID. Diller, J.S. 248 Lassen Volcanic National Park, California. Volcanic bombs at the southwest base of the Cinder Cone. Circa 1890. Plate 4, U.S. Geological Survey Bulletin 79. #1:/Lassen Volcanic National Park/djs00249 ID. Diller, J.S. 249 Lassen Volcanic National Park, California. Older lava, ash field, and Lassen Peak, viewed from the south base of the Cinder Cone. Circa 1890. Plate 15, U.S. Geological Survey Bulletin 79. #1:/Lassen Volcanic National Park/djs00250 ID. Diller, J.S. 250 Lassen Volcanic National Park, California. Cinder Cone, lava field, and Snag Lake, viewed from Prospect Peak, 10 miles northeast of Lassen Peak. #1:/Lassen Volcanic National Park/djs00256 ID. Diller, J.S. 256 Lassen Volcanic National Park, California. Crater of the Cinder Cone. Circa 1890. Photos djs00256 through djs00258 were probably used to produce Plate 5, U.S. Geological Survey Bulletin 79. #1:/Lassen Volcanic National Park/djs00257 ID. Diller, J.S. 257 Lassen Volcanic National Park, California. Crater of the Cinder Cone. Circa 1890. Photos djs00256 through djs00258 were probably used to produce Plate 5, U.S. Geological Survey Bulletin 79. #1:/Lassen Volcanic National Park/djs00258 ID. Diller, J.S. 258 Lassen Volcanic National Park, California. Crater of the Cinder Cone. Circa 1890. Photos djs00256 through djs00258 were probably used to produce Plate 5, U.S. Geological Survey Bulletin 79. #1:/Lassen Volcanic National Park/djs00264 ID. Diller, J.S. 264 Lassen Volcanic National Park, California. Surface of the lava field near Lake Bidwell. Circa 1890. #1:/Lassen Volcanic National Park/djs00266 ID. Diller, J.S. 266 Lassen Volcanic National Park, California. Lava dam and Snag Lake. Circa 1890. Plate 12, U.S. Geological Survey Bulletin 79. #1:/Lassen Volcanic National Park/djs00267 ID. Diller, J.S. 267 Lassen Volcanic National Park, California. Lava dam and Snag Lake. Circa 1890. Plate 13, U.S. Geological Survey Bulletin 79. #1:/Lassen Volcanic National Park/djs00268 ID. Diller, J.S. 268 Lassen Volcanic National Park, California. Edge of the lava field at the northwest corner of Snag Lake. Circa 1890. Plate 6, U.S. Geological Survey Bulletin 79; Figure 9, U.S. Geological Survey Folio 15. #1:/Lassen Volcanic National Park/djs00269 ID. Diller, J.S. 269 Lassen Volcanic National Park, California. Specimen of quartz basalt from the Cinder Cone. Circa 1890. #1:/Lassen Volcanic National Park/djs00271 ID. Diller, J.S. 271 Lassen Volcanic National Park, California. Lava at Snag Lake. The white grains are quartz. Circa 1890. Plate 16, U.S. Geological Survey Bulletin 79. #1:/Lassen Volcanic National Park/djs00272 ID. Diller, J.S. 272 Lassen Volcanic National Park, California. Rugged surface of the lava field, formed of fragments, in the vicinity of the Cinder Cone, a quarter of a mile north of Snag Lake. The crust was broken and tossed about in the outward flow of the viscous mass. Circa 1890. Plate 7, U.S. Geological Survey Bulletin 79; Figure 6, U.S. Geological Survey Folio 15. #1:/Lassen Volcanic National Park/djs00273 ID. Diller, J.S. 273 Lassen Volcanic National Park, California. Lava field, looking southeast from the Cinder Cone toward Snag Lake. On the left the ashes cover the old flow from the Cinder Cone. On the right are the ridges of the latest flow. Circa 1890. Plate 8, U.S. Geological Survey Bulletin 79. #1:/Lassen Volcanic National Park/djs00275 ID. Diller, J.S. 275 Lassen Volcanic National Park, California. Tree pushed over by advancing lava, about one-third of a mile north of the Cinder Cone. The green forest grew up chiefly between the two eruptions. Circa 1890. Plate 14, U.S. Geological Survey Bulletin 79. #1:/Lassen Volcanic National Park/djs00276 ID. Diller, J.S. 276 Lassen Volcanic National Park, California. Lava field and the Cinder Cone, viewed from the north. Circa 1890. #1:/Crater Lake National Park/djs00335 ID. Diller, J.S. 335 Crater Lake National Park, Oregon. Moraine on the ridge forming the divide between Castle Creek and Anna Creek, near the camp ground. Circa 1901. #1:/Crater Lake National Park/djs00337 ID. Diller, J.S. 337 Crater Lake National Park, Oregon. Anchored floating tree near the northwest border of Wizard Island. The tree stands in 36 feet of water with its roots resting on the bottom as if it grew in the position it now occupies. It projects 3 feet above the water and is over 2 feet in diameter. Dr. Merriam is in the boat in the foreground. Circa 1901. #1:/Crater Lake National Park/djs00338 ID. Diller, J.S. 338 Crater Lake National Park, Oregon. Llao Rock, viewed from Kere Notch. Circa 1901. #1:/Crater Lake National Park/djs00339 ID. Diller, J.S. 339 Crater Lake National Park, Oregon. Llao Rock in profile. Circa 1901. #1:/Crater Lake National Park/djs00340 ID. Diller, J.S. 340 Crater Lake National Park, Oregon. Sentinel Rock, the Palisades, and Mount Theilsen. Circa 1901. #1:/Crater Lake National Park/djs00342 ID. Diller, J.S. 342 Crater Lake National Park, Oregon. Mount Theilsen, viewed from the plain 5 miles north of Crater Lake. #1:/Crater Lake National Park/djs00344 ID. Diller, J.S. 344 Crater Lake National Park, Oregon. Southern shore of Crater Lake, viewed from Kerr Notch. Dutton Point on the left; Dyar Rock, Eagle Crags and Castle Crest beyond. Phantom Ship at lower left center. Circa 1901. #1:/Crater Lake National Park/djs00345 ID. Diller, J.S. 345 Crater Lake National Park, Oregon. Vidae Peak, seen across the notch at the head of Sun Creek. Circa 1901. #1:/Crater Lake National Park/djs00346 ID. Diller, J.S. 346 Crater Lake National Park, Oregon. Vidae Peak on the left, Dyar Rock and Eagle Craggs, viewed from the notch at the head of Sun Creek. Circa 1901. #1:/Diller J.S. Collection/djs00434 ID. Diller, J.S. 434 Fin Rock and Cape Blanco. Curry County, Oregon.n.d. Plate 14-B in U.S. Geological Survey. Professional paper 60. 1908. #1:/Crater Lake National Park/djs00456 ID. Diller, J.S. 456 Crater Lake National Park, Oregon. Snow banks on the southwest crest of Crater Lake. Circa 1901. #1:/Crater Lake National Park/djs00457 ID. Diller, J.S. 457 Crater Lake National Park, Oregon. Snow drifts on the southwest rim of Crater Lake. Circa 1901. #1:/Crater Lake National Park/djs00458 ID. Diller, J.S. 458 Crater Lake National Park, Oregon. Slope under Victor Rock, viewed from the trail 200 feet from the summit. Circa 1901. #1:/Crater Lake National Park/djs00460 ID. Diller, J.S. 460 Crater Lake National Park, Oregon. Wall west of Victor Rock. Circa 1901. #1:/Crater Lake National Park/djs00461 ID. Diller, J.S. 461 Crater Lake National Park, Oregon. New slide (probably at waters edge) and sheets of lava from Crater Lake. Circa 1901. #1:/Crater Lake National Park/djs00462 ID. Diller, J.S. 462 Crater Lake National Park, Oregon. Devils Backbone. Circa 1901. #1:/Crater Lake National Park/djs00463 ID. Diller, J.S. 463 Crater Lake National Park, Oregon. Dike of the Watchman, viewed from island in the lake. Circa 1901. #1:/Crater Lake National Park/djs00464 ID. Diller, J.S. 464 Crater Lake National Park, Oregon. Dike of the Watchman, viewed from island in the lake. Circa 1901. #1:/Crater Lake National Park/djs00465 ID. Diller, J.S. 465 Crater Lake National Park, Oregon. Devils Backbone, viewed from Wizard Island. Circa 1901. #1:/Crater Lake National Park/djs00466 ID. Diller, J.S. 466 Crater Lake National Park, Oregon. Lake slope of Castle Crest. Circa 1901. #1:/Crater Lake National Park/djs00467 ID. Diller, J.S. 467 Crater Lake National Park, Oregon. Phantom Ship, viewed from spur on Crater Lake. Circa 1901. #1:/Crater Lake National Park/djs00468 ID. Diller, J.S. 468 Crater Lake National Park, Oregon. Northeast crater rim from Wineglass to Cleetwood Bay. Circa 1901. #1:/Crater Lake National Park/djs00469 ID. Diller, J.S. 469 Crater Lake National Park, Oregon. Rhyolite cliff south of Wineglass. Circa 1901. #1:/Crater Lake National Park/djs00470 ID. Diller, J.S. 470 Crater Lake National Park, Oregon. Palisade Point. Circa 1901. #1:/Crater Lake National Park/djs00471 ID. Diller, J.S. 471 Crater Lake National Park, Oregon. Cleetwood flow. Circa 1901. #1:/Crater Lake National Park/djs00472 ID. Diller, J.S. 472 Crater Lake National Park, Oregon. Dacite flows on the east rim. Mount Scott(?) in the background. Circa 1901. #1:/Crater Lake National Park/djs00473 ID. Diller, J.S. 473 Crater Lake National Park, Oregon. Wizard Island, a cinder cone, viewed from the shore of Crater Lake. Circa 1901. #1:/Crater Lake National Park/djs00474 ID. Diller, J.S. 474 Crater Lake National Park, Oregon. Dike from large flow, viewed from the east end of Llao Rock. Circa 1901. #1:/Crater Lake National Park/djs00477 ID. Diller, J.S. 477 Crater Lake National Park, Oregon. Eastern and southern rim of Crater Lake, viewed from near Victor Rock. Circa 1901. #1:/Crater Lake National Park/djs00479 ID. Diller, J.S. 479 Crater Lake National Park, Oregon. Summit of Wizard Island. Circa 1901. Photos djs00479 through djs00484 form a panorama. #1:/Crater Lake National Park/djs00480 ID. Diller, J.S. 480 Crater Lake National Park, Oregon. Summit of Wizard Island. Circa 1901. Photos djs00479 through djs00484 form a panorama. #1:/Crater Lake National Park/djs00481 ID. Diller, J.S. 481 Crater Lake National Park, Oregon. Summit of Wizard Island. Circa 1901. Photos djs00479 through djs00484 form a panorama. #1:/Crater Lake National Park/djs00482 ID. Diller, J.S. 482 Crater Lake National Park, Oregon. Summit of Wizard Island. Circa 1901. Photos djs00479 through djs00484 form a panorama. #1:/Crater Lake National Park/djs00483 ID. Diller, J.S. 483 Crater Lake National Park, Oregon. Summit of Wizard Island. Circa 1901. Photos djs00479 through djs00484 form a panorama. #1:/Crater Lake National Park/djs00484 ID. Diller, J.S. 484 Crater Lake National Park, Oregon. Summit of Wizard Island. Circa 1901. Photos djs00479 through djs00484 form a panorama. #1:/Crater Lake National Park/djs00485 ID. Diller, J.S. 485 Crater Lake National Park, Oregon. The Palisades and Red Cloud Cliff, viewed from the rim of Dutton Peak. Circa 1901. Photos djs00485 and djs00486 form a panorama. #1:/Crater Lake National Park/djs00486 ID. Diller, J.S. 486 Crater Lake National Park, Oregon. The Palisades and Red Cloud Cliff, viewed from the rim of Dutton Peak. Circa 1901. Photos djs00485 and djs00486 form a panorama. #1:/Crater Lake National Park/djs00487 ID. Diller, J.S. 487 Crater Lake National Park, Oregon. Vidae Peak, (Sun) Notch, Devil's Garden, and Castle Crest, viewed from the rim of Dutton Peak. Circa 1901. #1:/Crater Lake National Park/djs00488 ID. Diller, J.S. 488 Crater Lake National Park, Oregon. Flow of tuffaceous dacite east of Pumice Point. Circa 1901. Plate 9-B, U.S. Geological Survey Professional Paper 3. #1:/Crater Lake National Park/djs00489 ID. Diller, J.S. 489 Crater Lake National Park, Oregon. Inward flow of Rugged Crest toward Crater Lake, viewed from west Deer Cliff. Circa 1901. #1:/Crater Lake National Park/djs00490 ID. Diller, J.S. 490 Crater Lake National Park, Oregon. Rugged Crest, west Deer Cliff, and Llao Rock, viewed from the crest east of Deer Cliff. Circa 1901. Photos djs00490, dsj00491, and djs00492 form a panorama. #1:/Crater Lake National Park/djs00491 ID. Diller, J.S. 491 Crater Lake National Park, Oregon. Rugged Crest, west Deer Cliff, and Llao Rock, viewed from the crest east of Deer Cliff. Circa 1901. Photos djs00490, dsj00491, and djs00492 form a panorama. #1:/Crater Lake National Park/djs00492 ID. Diller, J.S. 492 Crater Lake National Park, Oregon. Rugged Crest, west Deer Cliff, and Llao Rock, viewed from the crest east of Deer Cliff. Circa 1901. Photos djs00490, dsj00491, and djs00492 form a panorama. #1:/Crater Lake National Park/djs00493 ID. Diller, J.S. 493 Crater Lake National Park, Oregon. Lone column of broken tunnel, viewed from Rugged Crest. Circa 1901. #1:/Crater Lake National Park/djs00496 ID. Diller, J.S. 496 Crater Lake National Park, Oregon. Devil's Backbone, viewed from shore. Circa 1901. #1:/Crater Lake National Park/djs00498 ID. Diller, J.S. 498 Crater Lake National Park, Oregon. Alluvial cone on the shore of Steel Bay. Circa 1901. #1:/Crater Lake National Park/djs00499 ID. Diller, J.S. 499 Crater Lake National Park, Oregon. Glaciated andesite under a layer of pumice at Pumice Point. Circa 1901. #1:/Crater Lake National Park/djs00507 ID. Diller, J.S. 507 Crater Lake National Park, Oregon. Applegate Peak and Crater Lake rim, viewed from Pole Bridge Creek. Circa 1901. #1:/Crater Lake National Park/djs00519 ID. Diller, J.S. 519 Crater Lake National Park, Oregon. Castle Crest. Circa 1901. #1:/Crater Lake National Park/djs00549 ID. Diller, J.S. 549 Crater Lake National Park, Oregon. Sounding boat being lowered to Crater Lake from the rim. Circa 1901. #1:/Crater Lake National Park/djs00550 ID. Diller, J.S. 550 Crater Lake National Park, Oregon. Men building sounding boat on the crater rim. Circa 1901. #1:/Crater Lake National Park/djs00554 ID. Diller, J.S. 554 Crater Lake National Park, Oregon. Raft and evaporating pan; sounding boat in the background. Circa 1901. Plate 13-B, U.S. Geological Survey Professional Paper 3. #1:/Crater Lake National Park/djs00555 ID. Diller, J.S. 555 Crater Lake National Park, Oregon. Water gage station. Circa 1901. #1:/Crater Lake National Park/djs00594 ID. Diller, J.S. 594 Crater Lake National Park, Oregon. Valley of caved-in tunnel at Rugged Crest. Circa 1901. Plate 10-A, U.S. Geological Survey Professional Paper 3. #1:/Crater Lake National Park/djs00599 ID. Diller, J.S. 599 Crater Lake National Park, Oregon.U.S. Geological Survey water gage painted on a rock near Eagle Bay. July 20, 1901. Plate 13-A, U.S. Geological Survey Professional Paper 3. #1:/Crater Lake National Park/djs00600 ID. Diller, J.S. 600 Crater Lake National Park, Oregon.U.S. Geological Survey water gage placed near the site of Mazamas Society (Nickerson Bolt) gage established August 22, 1896. #1:/Hawaii Volcanoes National Park/djs00749 ID. Diller, J.S. 749 Hawaii Volcanoes National Park. Halemaumau Crater, viewed from the north. 1885. #1:/Hawaii Volcanoes National Park/djs00752 ID. Diller, J.S. 752 Hawaii Volcanoes National Park. Halemaumau Crater, viewed from the north. 1885. #1:/Crater Lake National Park/djs00761 ID. Diller, J.S. 761 Crater Lake National Park, Oregon. Model of the rim of Crater Lake. Prepared by V. Mindeleff under the direction of J.S. Diller; topography by Mark B. Kerr, 1892. Plate 12-B, U.S. Geological Survey Professional Paper 3. #1:/Crater Lake National Park/djs00765 ID. Diller, J.S. 765 Crater Lake National Park, Oregon. Castle Crest and Eagle Craggs, viewed from Crater Lake. Circa 1901. #1:/Crater Lake National Park/djs00766 ID. Diller, J.S. 766 Crater Lake National Park, Oregon. Victor Rock (Sinnott Memorial) and canyons, viewed from the sounding boat on Crater Lake. Circa 1901. #1:/Crater Lake National Park/djs00768 ID. Diller, J.S. 768 Crater Lake National Park, Oregon. Devils Backbone. Circa 1901. Portion of Plate 8-A, U.S. Geological Survey Professional Paper 3. #1:/Crater Lake National Park/djs00769 ID. Diller, J.S. 769 Crater Lake National Park, Oregon. Wizard Island, viewed from rock flow. Circa 1901. Plate 8-B, U.S. Geological Survey Professional Paper 3. #1:/Crater Lake National Park/djs00770 ID. Diller, J.S. 770 Crater Lake National Park, Oregon. East Palisades and Wineglass; U.S. Geological Survey sounding boat in the foreground. Circa 1901. Plate 7-B, U.S. Geological Survey Professional Paper 3. #1:/Crater Lake National Park/djs00771 ID. Diller, J.S. 771 Crater Lake National Park, Oregon. Cleetwood Cove flow. Circa 1901. Plate 10-B, U.S. Geological Survey Professional Paper 3. #1:/Crater Lake National Park/djs00775 ID. Diller, J.S. 775 Crater Lake National Park, Oregon. Left to right, photos djs00775 through djs00778 form a panorama of Eagle Crags to the Palisades, viewed from Mount Scott. This photograph shows Eagle Crags to Eagle Point. Circa 1901. #1:/Crater Lake National Park/djs00776 ID. Diller, J.S. 776 Crater Lake National Park, Oregon. Left to right, photos djs00775 through djs00778 form a panorama of Eagle Crags to the Palisades, viewed from Mount Scott. Left to right: Discovery Point, The Watchman, Wizard Island (in the lower middle ground), and Hillman Peak. Circa 1901. #1:/Crater Lake National Park/djs00777 ID. Diller, J.S. 777 Crater Lake National Park, Oregon. Left to right, photos djs00775 through djs00778 form a panorama of Eagle Crags to the Palisades, viewed from Mount Scott. From left of center: Llao Rock, Pumice Point, and back or east side of Castle Rock in the foreground. Circa 1901. #1:/Crater Lake National Park/djs00778 ID. Diller, J.S. 778 Crater Lake National Park, Oregon. Left to right, photos djs00775 through djs00778 form a panorama of Eagle Crags to the Palisades, viewed from Mount Scott. Left to right: Cleetwood Cove, Rugged Crest, Palisade Point, and Palisades. Circa 1901. #1:/Crater Lake National Park/djs00779 ID. Diller, J.S. 779 Crater Lake National Park, Oregon. Llao Rock, viewed from water level. Circa 1901. Plate 9, U.S. Geological Survey Professional Paper 3. #1:/Crater Lake National Park/djs00781 ID. Diller, J.S. 781 Crater Lake National Park, Oregon. Sun Creek Notch, viewed from the south, looking toward the crater. Circa 1901. #1:/Crater Lake National Park/djs00782 ID. Diller, J.S. 782 Crater Lake National Park, Oregon. Phantom Ship, viewed from Castle Crest. Circa 1901. #1:/Crater Lake National Park/djs00783 ID. Diller, J.S. 783 Crater Lake National Park, Oregon. Cleetwood Cove, Pumice Point, and Klamath Marsh in the distance, viewed from Llao Rock. Circa 1901. #1:/Crater Lake National Park/djs00785 ID. Diller, J.S. 785 Crater Lake National Park, Oregon. Relation between Castle Crest and Crater Peak (Garfield Peak?), viewed from The Watchman. Circa 1901. #1:/Crater Lake National Park/djs00786 ID. Diller, J.S. 786 Crater Lake National Park, Oregon. Union Peak. Circa 1901. Plate 3-A, U.S. Geological Survey Professional Paper 3. #1:/Crater Lake National Park/djs00787 ID. Diller, J.S. 787 Crater Lake National Park, Oregon. Pinnacles of the middle branch of Annie Creek. Circa 1901. #1:/Crater Lake National Park/djs00788 ID. Diller, J.S. 788 Crater Lake National Park, Oregon. Rim of Crater Lake in the distance, across Canyon of Anna (Annie) Creek. In the background, Castle Crest is seen on the left and Vidae Peak on the right. Circa 1901. Plate 3-B, U.S. Geological Survey Professional Paper 3. #1:/Crater Lake National Park/djs00790 ID. Diller, J.S. 790 Crater Lake National Park, Oregon. Jointed tuff of Anna (Annie) Creek. Circa 1901. Plate 11, U.S. Geological Survey Professional Paper 3. #1:/Crater Lake National Park/djs00791 ID. Diller, J.S. 791 Crater Lake National Park, Oregon. Left to right: The Watchman, Hillman Peak, Skell Channel, the west part of Wizard Island, and Devils Backbone. View is west-northwest from Victor Rock (Sinnott Memorial). Circa 1901. Plate 4 (upper left), U.S. Geological Survey Professional Paper 3. #1:/Crater Lake National Park/djs00792 ID. Diller, J.S. 792 Crater Lake National Park, Oregon. Left to right: the east side of Wizard Island, Llao Rock, Pumice Point, and Palisades. View is northwest from Victor Rock (Sinnott Memorial). Circa 1901. Plate 4 (upper right), U.S. Geological Survey Professional Paper 3. #1:/Crater Lake National Park/djs00793 ID. Diller, J.S. 793 Crater Lake National Park, Oregon. Left to right: Cleetwood Cove, Palisade Point, Palisades, and Wineglass. View is northeast from Victor Rock (Sinnott Memorial). Circa 1901. Plate 4 (lower left), U.S. Geological Survey Professional Paper 3. #1:/Crater Lake National Park/djs00794 ID. Diller, J.S. 794 Crater Lake National Park, Oregon. Mount Garfield on the right, looking east- northeast from Victor Rock (Sinnott Memorial), probably toward Skell Head. Circa 1901. Plate 4 (lower right), U.S. Geological Survey Professional Paper 3. #1:/Crater Lake National Park/djs00796 ID. Diller, J.S. 796 Crater Lake National Park, Oregon. Inner slope of Glacier Peak (Hillman Peak), viewed from near The Watchman. Circa 1901. Plate 7-A, U.S. Geological Survey Professional Paper 3. #1:/Crater Lake National Park/djs00860 ID. Diller, J.S. 860 Crater Lake National Park, Oregon. Photograph of a drawing of Mount Mazama restored. The snow-covered cone deeply cut by the glacier rested on the rim of Crater Lake. Mount Theilsen is on the left, 12 miles away. Plate 12-A, U.S. Geological Survey Professional Paper 3. #1:/Lassen Volcanic National Park/djs00881 ID. Diller, J.S. 881 Lassen Volcanic National Park, California. Bumpass Hell, looking north 100 degrees west along the western fault. The dark rocks at the extreme left are basalt. The others are dacite. Bumpass Hell is 500 feet long and 200 feet wide, with numerous pools, fumaroles, and hot springs. The Largest spring seen along the eastern fault is on the right. The line between the dark basalt and the white altered dacite is a fault also and has considerable vigorous steam spring action. August 13, 1921. #1:/Lassen Volcanic National Park/djs00882 ID. Diller, J.S. 882 Lassen Volcanic National Park, California. Bumpass Hell near the northwest end of the eastern fault. August 13, 1921. #1:/Lassen Volcanic National Park/djs00888 ID. Diller, J.S. 888 Lassen Volcanic National Park, California. East across Bumpass Hell, showing the line of the eastern fault and the line of greatest activity. The white slopes are altered dacite which is unaltered in the cliffs above. August 13, 1921. #1:/Lassen Volcanic National Park/djs00917 ID. Diller, J.S. 917 Lassen Volcanic National Park, California. Lassen Peak and Chaos Crag, viewed from Manzanita Lake. October 1915. #1:/Crater Lake National Park/djs0333a ID. Diller, J.S. 333a Crater Lake National Park, Oregon. Rim of Crater Lake, Castle Crest, and Vidae Peak. Circa 1901. #1:/Crater Lake National Park/djs0520a ID. Diller, J.S. 520a Crater Lake National Park, Oregon.U.S. Geological Survey camp on the rim of Crater Lake. Circa 1900. #1:/Crater Lake National Park/djs0780a ID. Diller, J.S. 780a Crater Lake National Park, Oregon. Western portion of Wizard Island. Victor Rock is in the foreground; Llao Rock in right background. Circa 1901. Similar to Plate 3, U.S. Geological Survey Professional Paper 3. #1:/Harpers Ferry National Historic Park/dnh00235 ID. Darton, N.H. 235 Harpers Ferry National Historic Park, West Virginia. The Potomac River near Harpers Ferry. Planation of rock ledges in the river bed. #1:/Harpers Ferry National Historic Park/dnh00236 ID. Darton, N.H. 236 Harpers Ferry National Historic Park, West Virginia. Junction of the Shenandoah and Potomac Rivers at Harpers Ferry. #1:/Harpers Ferry National Historic Park/dnh00237 ID. Darton, N.H. 237 Harpers Ferry National Historic Park, West Virginia. The Shenandoah River near Harpers Ferry. #1:/Chimney Rock National Historic Site/dnh00315 ID. Darton, N.H. 315 Chimney Rock National Historic Site, Nebraska. Chimney Rock, viewed from the east, west of Camp Clark. Gering Sandstone on Brule Clay. The horse is on a bed of volcanic ash. 1897. Plate 24 B, U.S. Geological Survey Professional Paper 17. #1:/Scotts Bluff National Monument/dnh00335 ID. Darton, N.H. 335 Scotts Bluff National Monument, Nebraska. Castle Rock, viewed from the east. Arikaree on Gering and Brule Formations, showing bed of volcanic ash near the foot of the slope. 1897. Plate 32-A, U.S. Geological Survey Professional Paper 17. #1:/Scotts Bluff National Monument/dnh00352 ID. Darton, N.H. 352 Scotts Bluff National Monument, Nebraska. Unconformity in the north face of Scotts Bluff, looking west. Gering Sandstone on Brule clay. 1897. #1:/Scotts Bluff National Monument/dnh00353 ID. Darton, N.H. 353 Scotts Bluff National Monument, Nebraska. Scotts Bluff, viewed from the southeast, west of Gering. 1897. #1:/Scotts Bluff National Monument/dnh00357 ID. Darton, N.H. 357 Scotts Bluff National Monument, Nebraska. Arikaree capping Dome Rock near Gering. 1897. #1:/Yellowstone National Park/dnh00650 ID. Darton, N.H. 650 Yellowstone National Park, Wyoming. Mammoth Hot Springs, viewed from the east. 1899. #1:/Yellowstone National Park/dnh00651 ID. Darton, N.H. 651 Yellowstone National Park, Wyoming. Minerva Terrace in the Mammoth Hot Springs area. 1899. #1:/Yellowstone National Park/dnh00655 ID. Darton, N.H. 655 Yellowstone National Park, Wyoming. Mammoth Hot Springs terrace. Pulpit Terrace on the right. 1899. #1:/Yellowstone National Park/dnh00656 ID. Darton, N.H. 656 Yellowstone National Park, Wyoming. Mammoth Hot Springs terrace. 1899. #1:/Yellowstone National Park/dnh00663 ID. Darton, N.H. 663 Yellowstone National Park, Wyoming. Lower Falls of the Yellowstone River. 1899. #1:/Yellowstone National Park/dnh00669 ID. Darton, N.H. 669 Yellowstone National Park, Wyoming. Paint pots near Fountain Geyser in Lower Geyser Basin. 1899. #1:/Devils Tower National Monument/dnh00727 ID. Darton, N.H. 727 Devils Tower National Monument, Wyoming. Devils Tower. Horse and wagon in right foreground shadow. Circa 1900. #1:/Devils Tower National Monument/dnh00730 ID. Darton, N.H. 730 Devils Tower National Monument, Wyoming. Devils Tower, viewed from the bank of Belle Fourche River, three-quarters of a mile south. Circa 1900. #1:/Devils Tower National Monument/dnh00736 ID. Darton, N.H. 736 Devils Tower National Monument, Wyoming. Devils Tower, viewed from the southeast. Red shale of the Spearfish Formation at the base. Circa 1900. #1:/Devils Tower National Monument/dnh00738 ID. Darton, N.H. 738 Devils Tower National Monument, Wyoming. Devil's Tower. #1:/Devils Tower National Monument/dnh00740 ID. Darton, N.H. 740 Devils Tower National Monument, Wyoming. Devils Tower, viewed from the bank of Belle Fourche River, 1 mile south. Circa 1900. #1:/Darton Collection/dnh00778 ID. Darton, N.H. 778 Red sandstone near Perry Park, west of Larkspur station; south of Denver, Colorado. Looking south. Douglas County, Colorado, circa 1901. #1:/Darton Collection/dnh01048 ID. Darton, N.H. 1048 Dakota Hogback near Canyon City. View from south side of Arkansas River, looking north. Red Valley to left, Niobrara ridge to right. Fremonth County, Colorado, 1904. #1:/Darton Collection/dnh01049 ID. Darton, N.H. 1049 Near view of Dakota Hogback in small gap, 2 miles southwest of Canyon City, Morrison to left, Niobrara ridge to extreme right. Looking northeast. Fremont County, Colorado, 1904. #1:/Colorado-Professional paper 52/dnh01050 ID. Darton, N.H. 1050 Dakota sandstone in hogback ridge 2 miles southwest of Canyon [City], looking north, shows upper and lower sandstone members with intermediate shales. Fremont County, Colorado. 1904. Plate 10-A in U.S. Geological Survey. Professional paper 52. 1906. #1:/Colorado-Professional paper 52/dnh01051 ID. Darton, N.H. 1051 Morrison formation on granites west of Grape Creek, 4 miles southwest of Canyon [City], looking north northwest. The prominent ledge of sandstone is "Dakota". Fremont County, Colorado. 1904. Plate 17-B in U.S. Geological Survey. Professional paper 52. 1906. #1:/Darton Collection/dnh01061 ID. Darton, N.H. 1061 Dakota sandstone east of "Blair Athol", northwest of Colorado Springs. Looking southwest. Shows three sandstones. Red beds to right. El Paso County, Colorado, 1904. #1:/Darton Collection/dnh01067 ID. Darton, N.H. 1067 Timpas linestone on Carlile sandstone two miles northwest of Lajunta, looking northwest. The sandstone is behind the figure. Otero county, Colorado, 1904. Published as plate 15b in U. S. Geological Survey, Professional paper 52, 1906. #1:/Darton Collection/dnh01070 ID. Darton, N.H. 1070 Dakota sandstone on north bank of Bear Creek 12 miles west-by-south of Johnson City. Looking south. Shows underlying fire clay. Stanton County, Kansas. 1904. Published as plate 4 in U. S. Geological Survey. Folio 212. 1920. #1:/Darton Collection/dnh01071 ID. Darton, N.H. 1071 Dakota sandstone rising above Pleistocens deposits. Bear Creek, 11 miles west by south of Johnson City. Looking south. Stanton County, Kansas. 1904. Published as figure 3 in U. S. Geological Survey. Folio 212. 1920. #1:/Grand Canyon National Park/dnh00911 ID. Darton, N.H. 911 Grand Canyon National Park, Arizona. This photograph was taken from a small promontory of rocks. For the tree to have reached this size would probably require 10 or more years of growth. Thus, the tree became established in about 1892, or earlier, and persisted until at least 1923. 1923. Figure 68-A, U.S. Geological Survey Professional Paper 1132. #1:/Jewel Cave National Monument/dnh01222 ID. Darton, N.H. 1222 Jewel Cave National Monument, South Dakota. Entrance to Jewel Cave, Hell Canyon, west of Custer. Circa 1900. #1:/Petrified Forest National Park/dnh01330 ID. Darton, N.H. 1330 Petrified Forest National Park, Arizona. Ostrich Rock, an erosion tower. 1904. #1:/Petrified Forest National Park/dnh01331 ID. Darton, N.H. 1331 Petrified Forest National Park, Arizona. Natural bridge of petrified log. 1904. #1:/Petrified Forest National Park/dnh01332 ID. Darton, N.H. 1332 Petrified Forest National Park, Arizona. Petrified log in place. 1904. #1:/Petrified Forest National Park/dnh01333 ID. Darton, N.H. 1333 Petrified Forest National Park, Arizona. Petrified logs in place and talus. 1904. #1:/Petrified Forest National Park/dnh01334 ID. Darton, N.H. 1334 Petrified Forest National Park, Arizona. Clay under log-bearing bed. 1904. #1:/Walnut Canyon National Monument/dnh01378 ID. Darton, N.H. 1378 Walnut Canyon National Monument, Arizona. Cross-bedded Coconino Sandstone in Walnut Creek Canyon. 1914. #1:/Walnut Canyon National Monument/dnh01379 ID. Darton, N.H. 1379 Walnut Canyon National Monument, Arizona. Cross-bedded Coconino Sandstone and Kaibab Limestone. 1914. #1:/Petrified Forest National Park/dnh01411 ID. Darton, N.H. 1411 Petrified Forest National Park, Arizona. Group of petrified log sections south of Adamana. 1915. #1:/Petrified Forest National Park/dnh01412 ID. Darton, N.H. 1412 Petrified Forest National Park, Arizona. The Cannon. Circa 1915. #1:/Petrified Forest National Park/dnh01413 ID. Darton, N.H. 1413 Petrified Forest National Park, Arizona. Group of petrified log sections south of Adamana. Circa 1915. #1:/Darton N.H. Collection/dnh01512 ID. Darton, N.H. 1512 Looking north along hogback of Niobrara limestone west of Colorado Springs. Gate to Garden of the Gods in left background. El Paso County, Colorado.n.d. #1:/White Sands National Monument/dnh01792 ID. Darton, N.H. 1792 White Sands National Monument, New Mexico. White sands of Tularosa Basin west of Alamogordo. The material is gypsum. Photo by U.S. Army Air Service, 1925. Figure 48-A, U.S. Geological Survey Bulletin 794. #1:/Outer Banks of North Carolina/dol00003 ID. Dolan, R. 3ct Outer Banks of North Carolina. New lands are created as tidal deltas become vegetated. Floodtide delta in the upper right; ebbtide delta in the lower left. Photo by J. Fisher, circa 1980. Figure 12-A, U.S. Geological Survey Professional Paper 1177-B. #1:/Outer Banks of North Carolina/dol00004 ID. Dolan, R. 4ct Outer Banks of North Carolina. Pattern of clearly evident oceanic overwash and inlet sedimentation on the bay side of Pea Island. Circa 1980. Figure 13, U.S. Geological Survey Professional Paper 1177-B. #1:/Outer Banks of North Carolina/dol00006 ID. Dolan, R. 6ct Outer Banks of North Carolina. As the barrier islands migrate landward, freshwater peat deposits are uncovered. Wide peat deposit at the beach, with waves coming in from the left. Lighthouse in the distance. Circa 1980. Figure 18, U.S. Geological Survey Professional Paper 1177-B. #1:/Outer Banks of North Carolina/dol00007 ID. Dolan, R. 7ct Outer Banks of North Carolina. Pattern of overwash and storm-surge penetration at Nags Head during the March 7, 1962, storm. Figure 26, U.S. Geological Survey Professional Paper 1177-B. #1:/Cape Hatteras National Seashore/dol00011 ID. Dolan, R. 11ct Cape Hatteras National Seashore, North Carolina. Large crescentic landforms at Cape Hatteras. Photo courtesy of NASA. Figure 30-A, U.S. Geological Survey Professional Paper 1177-B. #1:/Outer Banks of North Carolina/dol00012 ID. Dolan, R. 12ct Outer Banks of North Carolina. Large crescentic landforms at Cape Lookout. Photo courtesy of NASA. Figure 30-B, U.S. Geological Survey Professional Paper 1177-B. #1:/Cape Hatteras National Seashore/dol00015 ID. Dolan, R. 15ct Cape Hatteras National Seashore, North Carolina. Groins trap sand that normally moves along the shoreline at Cape Hatteras. Lighthouse on the left; waves coming in from the right. 1971. Figure 51, U.S. Geological Survey Professional Paper 1177-B. #1:/Fenwick Island, Maryland/dolw0002 ID. Dolan, R. 2 Fenwick Island, Maryland. Ocean City. 1977. Figure 1, U.S. Geological Survey Professional Paper 1177-A. #1:/Fenwick Island, Maryland/dolw0010 ID. Dolan, R. 10 Fenwick Island, Maryland. One week after the Great Atlantic storm of March 7, 1962. The light-colored areas are sand deposits that were washed over Fenwick Island during the storm. March 15, 1972. Portions are figures 20 and 23, U.S. Geological Survey Professional Paper 1177-A. #1:/Fenwick Island, Maryland/dolw0011 ID. Dolan, R. 11 Fenwick Island, Maryland. Groin field along Fenwick Island. Figure 24, U.S. Geological Survey Professional Paper 1177-A. #1:/Fenwick Island, Maryland/dolw0013 ID. Dolan, R. 13 Fenwick Island, Maryland. Hotels and development along the shore front of Ocean City. The distance between buildings and shore line leaves little room for natural processes during storms. Figure 26, U.S. Geological Survey Professional Paper 1177-A. #1:/Cape Hatteras National Seashore/dolw0020 ID. Dolan, R. 20bw Cape Hatteras National Seashore, North Carolina. Serious loss of property near Cape Hatteras, caused by shoreline recession and storm tides such as this. Bulldozers at work in the background. Figure 33, U.S. Geological Survey Professional Paper 1177-A. #1:/Cape Hatteras National Seashore/dolw0025 ID. Dolan, R. 25bw Cape Hatteras National Seashore, North Carolina. Overwash (mark) at Cape Hatteras. Houses, beach, and surf in the foreground. 1962. Figure 40, U.S. Geological Survey Professional Paper 1177-B. #1:/Outer Banks of North Carolina/dolw0026 ID. Dolan, R. 26 Outer Banks of North Carolina. Pattern of development at Nags Head. 1958. Figure 42-A, U.S. Geological Survey Professional Paper 1177-B. Compare with photo dolw0027. #1:/Outer Banks of North Carolina/dolw0027 ID. Dolan, R. 27 Outer Banks of North Carolina. Pattern of development at Nags Head. Photo courtesy of U.S. National Park Service, 1979. Figure 42-B, U.S. Geological Survey Professional Paper 1177-B. Compare with photo dolw0026. #1:/Cape Hatteras National Seashore/dr000015 ID. Dolan, R. 15 Cape Hatteras National Seashore, North Carolina. Groins trap sand that normally moves along the shoreline. 1971. Figure 51-A, U.S. Geological Survey Professional Paper 1177-B. #1:/Cape Hatteras National Seashore/dr000016 ID. Dolan, R. 16ct Cape Hatteras National Seashore, North Carolina. Oregon Inlet and Bonner Bridge. 1971. Figure 52-A, U.S. Geological Survey Professional Paper 1177-B. #1:/Cape Hatteras National Seashore/dr000017 ID. Dolan, R. 17ct Cape Hatteras National Seashore, North Carolina. Hatteras Island (stabilized). The difference in beach widths can be seen this photo and photo dr000018. 1971. Figure 59-A, U.S. Geological Survey Professional Paper 1177-B. #1:/Cape Hatteras National Seashore/dr000018 ID. Dolan, R. 18ct Cape Hatteras National Seashore, North Carolina. Core Banks (stabilized). The difference in beach widths can be seen in this photo and photo dr000017. 1971. Figure 59-B, U.S. Geological Survey Professional Paper 1177-B. #1:/Cape Hatteras National Seashore/dr000019 ID. Dolan, R. 19 Cape Hatteras National Seashore, North Carolina. Pattern of storm-surge penetration along Hatteras Island. Photo by U.S. Army. Figure 32, U.S. Geological Survey Professional Paper 1177-B. #1:/Cape Hatteras National Seashore/dr000020 ID. Dolan, R. 20 Cape Hatteras National Seashore, North Carolina. Serious losses of property near Cape Hatteras caused by shoreline recession and storm tides. Figure 33, U.S. Geological Survey Professional Paper 1177-B. #1:/Cape Hatteras National Seashore/dr000022 ID. Dolan, R. 22ct Cape Hatteras National Seashore, North Carolina. Sandbag seawall which was constructed at the base of the Cape Hatteras lighthouse. This seawall was destroyed by wave action soon after it was completed. 1971. Figure 64, U.S. Geological Survey Professional Paper 1177-B. #1:/Cape Hatteras National Seashore/dr000025 ID. Dolan, R. 25 Cape Hatteras National Seashore, North Carolina. Overwash at Cape Hatteras. 1962. Figure 40, U.S. Geological Survey Professional Paper 1177-B. #1:/Cape Hatteras National Seashore/dr000031 ID. Dolan, R. 31 Cape Hatteras National Seashore, North Carolina. Beach nourishment activity, groins etc. 1974. Figure 51-B, U.S. Geological Survey Professional Paper 1177-B. #1:/Cape Hatteras National Seashore/dr000033 ID. Dolan, R. 33 Cape Hatteras National Seashore, North Carolina. The concept of transferring sand from offshore shoals to the inshore zone near Cape Hatteras. Sketch on photograph uses a boat to show how waves move along the shore. 1974. Figure 53, U.S. Geological Survey Professional Paper 1177-B. #1:/Cape Hatteras National Seashore/dr000037 ID. Dolan, R. 37 Cape Hatteras National Seashore, North Carolina. Overwash fans north of Cape Hatteras. 1972. Figure 56, U.S. Geological Survey Professional Paper 1177-B. #1:/Cape Hatteras National Seashore/dr00016a ID. Dolan, R. 16a Cape Hatteras National Seashore, North Carolina. Pattern of overwash and storm-surge penetration near Cape Hatteras. Circa 1984. Portion of Figure 15, U.S. Geological Survey Professional Paper 1177-B. #1:/Glacier National Park/drb00090 ID. Dole, R.B. 90 Glacier National Park, Montana. Hauling drinking water from upper Saint Mary Lake. 1913. #1:/Glacier National Park/drb00092 ID. Dole, R.B. 92 Glacier National Park, Montana. Granite Park, viewed from Swiftcurrent Pass. 1913. #1:/Glacier National Park/drb00093 ID. Dole, R.B. 93 Glacier National Park, Montana. McDermott (Swiftcurrent) Lake and Falls, viewed from Many Glacier camp. 1913. #1:/Glacier National Park/drb00095 ID. Dole, R.B. 95 Glacier National Park, Montana. Gunsight Pass, viewed from camp. 1913. #1:/Glacier National Park/drb00096 ID. Dole, R.B. 96 Glacier National Park, Montana. Grinnell Glacier, viewed from the old town of Altyn. 1913. #1:/Glacier National Park/drb00098 ID. Dole, R.B. 98 Glacier National Park, Montana. Jackson Peak and Trail, viewed from Lincoln Pass. 1913. #1:/Glacier National Park/drb00102 ID. Dole, R.B. 102 Glacier National Park, Montana. Cook cabin at Two Medicine Camp. 1913. #1:/Dry Tortugas National Park/drb00113 ID. Dole, R.B. 113 Dry Tortugas National Park, Florida. Wreck of the naval coaling station at Fort Jefferson. 1913. #1:/Dry Tortugas National Park/drb00114 ID. Dole, R.B. 114 Dry Tortugas National Park, Florida. Interior of the fortifications at Fort Jefferson. 1913. #1:/Dry Tortugas National Park/drb00115 ID. Dole, R.B. 115 Dry Tortugas National Park, Florida. Interior of the fortifications at Fort Jefferson. 1913. #1:/Dry Tortugas National Park/drb00116 ID. Dole, R.B. 116 Dry Tortugas National Park, Florida. Sally Port at Fort Jefferson. 1913. #1:/Dry Tortugas National Park/drb00117 ID. Dole, R.B. 117 Dry Tortugas National Park, Florida. Cast iron cannon off its mount at Fort Jefferson. 1913 #1:/Dry Tortugas National Park/drb00118 ID. Dole, R.B. 118 Dry Tortugas National Park, Florida. Exterior of the Carnegie Institution Marine Biological Laboratory. 1913. #1:/Dry Tortugas National Park/drb00119 ID. Dole, R.B. 119 Dry Tortugas National Park, Florida. Interior of the Carnegie Institution Marine Biological Laboratory. 1913. #1:/Dry Tortugas National Park/drb00121 ID. Dole, R.B. 121 Dry Tortugas National Park, Florida. Barracuda caught off Loggerhead Key. 1913. #1:/Dry Tortugas National Park/drb00122 ID. Dole, R.B. 122 Dry Tortugas National Park, Florida. Loggerhead Key lighthouse. 1913. #1:/Yosemite National Park/drb00129 ID. Dole, R.B. 129 Yosemite National Park, California. Small falls on the Merced River. 1913. #1:/Yosemite National Park/drb00131 ID. Dole, R.B. 131 Yosemite National Park, California. Merced Lake, viewed from the trail of Vogelsang Pass. 1913. #1:/Yosemite National Park/drb00132 ID. Dole, R.B. 132 Yosemite National Park, California. Merced Lake, viewed from the trail of Vogelsang Pass, somewhat to right of photo cfc00131. 1913. #1:/Yosemite National Park/drb00133 ID. Dole, R.B. 133 Yosemite National Park, California. Mount Lyell and view from Vogelsang Pass. 1913. #1:/Yosemite National Park/drb00138 ID. Dole, R.B. 138 Yosemite National Park, California. Tuolumne Meadows and Cathedral Peak. 1913. #1:/Yosemite National Park/drb00140 ID. Dole, R.B. 140 Yosemite National Park, California. Fairview Dome, viewed from Tuolumne Meadows. 1913. #1:/Yosemite National Park/drb00141 ID. Dole, R.B. 141 Yosemite National Park, California. Upper end of Tuolumne Canyon. 1913. #1:/Yosemite National Park/drb00144 ID. Dole, R.B. 144 Yosemite National Park, California. Ragged Peak. 1913. #1:/Yosemite National Park/drb00145 ID. Dole, R.B. 145 Yosemite National Park, California. Cathedral Peak. 1913. #1:/Yosemite National Park/drb00146 ID. Dole, R.B. 146 Yosemite National Park, California. Across Matterhorn Canyon. 1913. #1:/Yosemite National Park/drb00147 ID. Dole, R.B. 147 Yosemite National Park, California. Up Matterhorn Canyon, probably toward Finger Peaks. 1913. #1:/Yosemite National Park/drb00148 ID. Dole, R.B. 148 Yosemite National Park, California. Russian sugar pine on Wilson Creek. 1913. #1:/Yosemite National Park/drb00149 ID. Dole, R.B. 149 Yosemite National Park, California. Regulation Peak and Volunteer Peak, viewed from Benson Pass. 1913. #1:/Yosemite National Park/drb00150 ID. Dole, R.B. 150 Yosemite National Park, California. Glacial polish on granite near Smedburg Lake. 1913 #1:/Yosemite National Park/drb00151 ID. Dole, R.B. 151 Yosemite National Park, California. Piute Mountain and west foot of Volunteer Peak. 1913. #1:/Yosemite National Park/drb00152 ID. Dole, R.B. 152 Yosemite National Park, California. Pack train on Benson Lake Trail. 1913. #1:/Yosemite National Park/drb00153 ID. Dole, R.B. 153 Yosemite National Park, California. Glaciated granite in Kerrick Canyon, viewed from Seavey Pass. 1913. #1:/Yosemite National Park/drb00154 ID. Dole, R.B. 154 Yosemite National Park, California. Dead trees from a forest fire in Jack Main Canyon. 1913. #1:/Yosemite National Park/drb00155 ID. Dole, R.B. 155 Yosemite National Park, California. Dorothy Lake at the head of Jack Main Canyon. 1913. #1:/Yosemite National Park/drb00156 ID. Dole, R.B. 156 Yosemite National Park, California. Forsyth Peak and part of Dorothy Lake in Jack Main Canyon. 1913. #1:/Yosemite National Park/drb00159 ID. Dole, R.B. 159 Yosemite National Park, California. Tiltill Valley, viewed from Lake Vernon Trail. 1913. #1:/Yosemite National Park/drb00161 ID. Dole, R.B. 161 Yosemite National Park, California. Pack train near the foot of Tiltill Valley Trail. 1913. #1:/Yosemite National Park/drb00162 ID. Dole, R.B. 162 Yosemite National Park, California. Tuolumne River and Hetch Hetchy Canyon. 1913. #1:/Yosemite National Park/drb00164 ID. Dole, R.B. 164 Yosemite National Park, California. El Capitan, viewed from Artist Point. 1913. #1:/Yosemite National Park/drb00168 ID. Dole, R.B. 168 Yosemite National Park, California. Fireplace Bluffs, viewed from Inspiration Point. 1913. #1:/Yosemite National Park/drb00169 ID. Dole, R.B. 169 Yosemite National Park, California. Sentinel Bridge on the Merced River. 1913. #1:/Yosemite National Park/drb00172 ID. Dole, R.B. 172 Yosemite National Park, California. Site of proposed hotel on the Merced River. 1913. #1:/Death Valley National Park/dre00001 ID. Drewes, H. 1 Death Valley National Park, California. Section of basalt shales and conglomerate of the Copper Canyon Formation in Lower Copper Canyon. 1956. #1:/Death Valley National Park/dre00002 ID. Drewes, H. 2 Death Valley National Park, California. Conglomerate Copper Canyon Formation in Lower Copper Canyon. 1956. #1:/Death Valley National Park/dre00003 ID. Drewes, H. 3 Death Valley National Park, California. Turtleback, megabreccia, and Copper Canyon Formation in Lower Copper Canyon. 1956. #1:/Death Valley National Park/dre00005 ID. Drewes, H. 5 Death Valley National Park, California. Funeral Formation faulted against Precambrian rock along stripped fault surface in Upper Copper Canyon. 1956. #1:/Death Valley National Park/dre00006 ID. Drewes, H. 6 Death Valley National Park, California. Megabreccia in the Copper Canyon Formation in Copper Canyon. 1956. #1:/Death Valley National Park/dre00014 ID. Drewes, H. 14 Death Valley National Park, California. Salt pan, fans, and fault scarp with nick point, viewed from south of Dantes View. 1956. #1:/Death Valley National Park/dre00015 ID. Drewes, H. 15 Death Valley National Park, California. Turtleback fault in the Copper Canyon Formation over Precambrian rock. 1956. #1:/Death Valley National Park/dre00017 ID. Drewes, H. 17 Death Valley National Park, California. Fans and profile of turtleback north of Badwater. 1956. #1:/Death Valley National Park/dre00018 ID. Drewes, H. 18 Death Valley National Park, California. Black Mountains south of Dantes View. Upper Copper Canyon. 1956. #1:/Death Valley National Park/dre00019 ID. Drewes, H. 19 Death Valley National Park, California. Mudflow beds in the Copper Canyon Formation in the south fork of Copper Canyon. 1956. #1:/Death Valley National Park/dre00021 ID. Drewes, H. 21 Death Valley National Park, California. Crumpled beds beneath megabreccia in the Copper Canyon Formation in Copper Canyon. 1956. #1:/Death Valley National Park/dre00029 ID. Drewes, H. 29 Death Valley National Park, California. Salt pan, younger fans, and faulted older fans with beach scar at Mormon Point. 1956. #1:/Death Valley National Park/dre00030 ID. Drewes, H. 30 Death Valley National Park, California. South end of Death Valley, viewed from the mountains above Mormon Point. 1957. #1:/Death Valley National Park/dre00040 ID. Drewes, H. 40 Death Valley National Park, California. Basalt mesas and basins with Furnace Creek Formation. Distant Funeral Mountains are tilted blocks of Paleozoic rocks. View is northwest from Greenwater Range. 1957. #1:/Death Valley National Park/dre00054 ID. Drewes, H. 54 Death Valley National Park, California. West flank of the Black Mountains north of peak 4214, just south of Sheep Canyon in the lower right. The skyline ridge dropping to Death Valley, left and center, is the approximate profile of the surface of the Copper Canyon turtle back and is underlain near the crest by broadly arched metasedimentary rocks that grade into metadiorite near Sheep Canyon. 1957. Figure 3, U.S. Geological Survey Professional Paper 413. #1:/Dingman R.J. Collection-Dinosaur Tracks/drj00007 ID. Dingman, R.J. 7 Assembly of dinosaur trackways in the Chacarilla Formation. Quebrada Chacarilla. Tarapaca Province, Chile. ca. 1955. Figure 7 in U.S. Geological Survey. Bulletin 1189. 1965. #1:/Dingman R.J. Collection-Dinosaur Tracks/drj00008 ID. Dingman, R.J. 8 Detail of larger tracks individual tracks are 90 cm in diameter. Mud ridges are 10-15 cm above dipslope rock. Man for scale. Tarapaca Province, Chile. ca. 1955. Figure 8-A in U.S. Geological Survey. Bulletin 1189. 1965. #1:/Dale T.N. Collection/dtn00200 ID. Dale, T.N. 200 Pegmatite vein in diorite. Lincoln County, Maine.n.d. #1:/Duffield W.A. Collection/dwa00009 ID. Duffield, W.A. 9 Petrified log at the head of Steamboat Canyon. South Warner Wilderness Area. Modoc County, California. ca. 1973. #1:/Hawaii Volcanoes National Park/dwa00010 ID. Duffield, W.A. 10 Hawaii Volcanoes National Park. Photomicrograph of a sample of Pele's hair from Kilauea Volcano attached to a clot of spatter. Note the roughly circular outline of exposed vesicles on the clot and the elongate outlines of those on the hair, indicative of stretching during hair formation. Circa 1970. Figure 1, p.93, Journal of Research of the U.S. Geological Survey, v.5, no.1. #1:/Hawaii Volcanoes National Park/dwa00011 ID. Duffield, W.A. 11 Hawaii Volcanoes National Park. Photomicrograph of a sample of Pele's hair from Kilauea Volcano, showing a closed loop. Circa 1970. Figure 2-A, p.94, Journal of Research of the U.S. Geological Survey, v.5, no.1. #1:/Hawaii Volcanoes National Park/dwa00012 ID. Duffield, W.A. 12 Hawaii Volcanoes National Park. Photomicrograph of a sample of Pele's hair from Kilauea Volcano, showing branching. Note the microphenocrysts where the branch is attached to the main hair and the small nearly invisible branch between the two larger filaments. Circa 1970. Figure 2-B, p.94, Journal of Research of the U.S. Geological Survey, v.5, no.1. #1:/Hawaii Volcanoes National Park/dwa00014 ID. Duffield, W.A. 14 Hawaii Volcanoes National Park. Photomicrograph of a sample of Pele's hair from Kilauea Volcano, showing tuning fork shape. Circa 1970. Figure 2-D, p.94, Journal of Research of the U.S. Geological Survey, v.5 no.1. #1:/Hawaii Volcanoes National Park/dwa00015 ID. Duffield, W.A. 15 Hawaii Volcanoes National Park. Photomicrograph of a sample of Pele's hair from Kilauea Volcano with elongate vesicles parallel to a strand of hair. The longest vesicle was broken during sample preparation and partly filled with resin which formed a meniscus. Circa 1970. Figure 3-A, p.95, Journal of Research of the U.S. Geological Survey, v.5, no.1. #1:/Hawaii Volcanoes National Park/dwa00018 ID. Duffield, W.A. 18 Hawaii Volcanoes National Park. Photomicrograph of a sample of Pele's hair from Kilauea Volcano with a highly ribbed surface caused by multiple, near- surface elongate vesicles. Vesicles curve around a microphenocryst aligned with the long axis of the hair. Circa 1970. Figure 3-D, p.95, Journal of Research of the U.S. Geological Survey, v.5, no.1. #1:/Hawaii Volcanoes National Park/dwa00019 ID. Duffield, W.A. 19 Hawaii Volcanoes National Park. Scanning electron micrograph of a sample of Pele's hair from Kilauea Volcano almost completely coated with sublimate crust. Circa 1970. Figure 6-A, p.98, Journal of Research of the U.S. Geological Survey, v.5, no.1. #1:/Hawaii Volcanoes National Park/dwa00020 ID. Duffield, W.A. 20 Hawaii Volcanoes National Park. Scanning electron micrograph of a sample of Pele's hair from Kilauea Volcano with a feathery sublimate deposit (sulfur?). Photo by R.B. Finkelman, circa 1970. Figure 6-B, p.98, Journal of Research of the U.S. Geological Survey, v.5, no.1. #1:/Hawaii Volcanoes National Park/dwa00021 ID. Duffield, W.A. 21 Hawaii Volcanoes National Park. Scanning electron micrograph of a sample of Pele's hair from Kilauea Volcano with a small basaltic sphere cemented to it by sublimate. Photo by R.B. Finkelman, circa 1970. Figure 6-C, p. 98, Journal of Research of the U.S. Geological Survey, v.5, no.1. #1:/Yellowstone National Park/dwa00028 ID. Duffield, W.A. 28 Yellowstone National Park, Wyoming. Geochemist sampling gas dissolved in thermal water from a research well. Geochemical studies of fluids from such wells and from hot springs allow scientists to distinguish vapor-dominated from hot-water geothermal systems and to estimate subsurface temperatures. Circa 1980. Figure 3, U.S. Geological Survey Circular 862. #1:/Grand Canyon National Park/eca00007 ID. Edwards, C.A. 7ct Grand Canyon National Park, Arizona. West from Yavapai Point. Stratification is very apparent. September 4, 1983. Photos eca00007 and eca00008 form a panorama. #1:/Grand Canyon National Park/eca00008 ID. Edwards, C.A. 8ct Grand Canyon National Park, Arizona. West from Yavapai Point. Stratification is very apparent. September 4, 1983. Photos eca00007 and eca00008 form a panorama. #1:/Grand Canyon National Park/eca00010 ID. Edwards, C.A. 10ct Grand Canyon National Park, Arizona. Grand Canyon, viewed from the area of Yavapai Point. September 4, 1983. #1:/Grand Canyon National Park/eca00011 ID. Edwards, C.A. 11ct Grand Canyon National Park, Arizona. Grand Canyon, viewed from the area of Yavapai Point. September 4, 1983. #1:/Grand Canyon National Park/eca00012 ID. Edwards, C.A. 12ct Grand Canyon National Park, Arizona. Grand Canyon, viewed from the area of Yavapai Point. September 4, 1983. #1:/Grand Canyon National Park/eca00013 ID. Edwards, C.A. 13ct Grand Canyon National Park, Arizona. Across the Grand Canyon, viewed from Hermits Rest. September 4, 1983. #1:/Grand Canyon National Park/eca00014 ID. Edwards, C.A. 14ct Grand Canyon National Park, Arizona. Across the Grand Canyon from Hermits Rest. September 4, 1983. #1:/Grand Canyon National Park/eca00015 ID. Edwards, C.A. 15ct Grand Canyon National Park, Arizona. Across the Grand Canyon from Hermits Rest. September 4, 1983. #1:/Erdmann C.E. Collection-Service Coal Mine/ece00275 ID. Erdmann, C.E. 275 Service coal mine at foot of Book Cliffs. Hoisting plant and tipple in foreground. Cables lead to mine in Palisade Coal near foot of vertical sandstone cliff, northeast of Grand Junction. Mesa County, Colorado. 1927. #1:/Erdmann C.E. Collection-Carbonera Mine/ece00276 ID. Erdmann, C.E. 276 Tipple of Gilson Asphaltum Company's mine Carbonera. Garfield County, Colorado. 1927. #1:/Glacier National Park/ece00467 ID. Erdmann, C.E. 467 Glacier National Park, Montana. Pillow lava structure on the north side of Huckleberry Mountain. Note the chert veinlets. 1935. #1:/Erdmann C.E. Collection-Coalmont Strip Pit/ece00472 ID. Erdmann, C.E. 472 Coalmont strip pit from "D" hub, Coalmont district, Jackson County, Colorado. August 11, 1940. #1:/Erdmann C.E. Collection-Coalmont Strip Pit/ece00473 ID. Erdmann, C.E. 473 Truck loading coal, south along face of stripped bench from point in Coalmont district, Jackson County, Colorado. August 11, 1940. #1:/Erdmann C.E. Collection-Coalmont Strip Pit/ece00474 ID. Erdmann, C.E. 474 Overview working face from north end strip pit, Note bony coal in left corner. Coalmont district, Jackson County, Colorado. August 11, 1940. #1:/Erdmann C.E. Collection-Coalmont Strip Pit/ece00477 ID. Erdmann, C.E. 477 Mined out rooms at south end of pit. Coalmont district, Jackson County, Colorado. August 11, 1940. #1:/Erdmann C.E. Collection-Coalmont Strip Pit/ece00478 ID. Erdmann, C.E. 478 Coal mine working face detail. Shows structure of coal. Coalmont district, Jackson County, Colorado. August 11, 1940. #1:/Erskine C.F. Collection/ecf00003 ID. Erskine, C.F. 3 Slump along Highway 16 about 1 mile south of center of Chamberlain. The lower part of the slump, with a pressure ridge caused by forward and upward thrusting of the slump block at the toe, is inferred to be the original slump block. The upper part formed a graben formed by collapse after the original slump block moved and left the upslope material unsupported. Brule County, South Dakota. October 14, 1954. Figure 6 in U.S. Geological Survey. Professional paper 675. 1973. #1:/Eckel E.C. Collection-Quarry P.C. Company of Colorado/eec00025 ID. Eckel, E.C. 25 Quarry P.C. Company of Colorado, Portland. Fremont County, Colorado. 1903. #1:/Eckel E.C. Collection-Utah Portland Cement Company/eec00027 ID. Eckel, E.C. 27 Utah Portland Cement Company, Lime Quarry. Parley's Canon, Juab County, Utah. Oct. 9, 1903. #1:/California-Professional paper 116/egh00021 ID. Eldridge, G.H. 21 Form a panorama of Sunset Oil field, looking eastward from southeast corner of NW1/4 sec. 2, T.11 N., R. 24 W. Kern County, California. October 20, 1901. Plate 4-B in U.S. Geological Survey. Professional paper 116. 1920. #1:/California-Professional paper 116/egh00022 ID. Eldridge, G.H. 22 Form a panorama of Sunset Oil field, looking eastward from southeast corner of NW1/4 sec. 2, T.11 N., R. 24 W. Kern County, California. October 20, 1901. Plate 4-B in U.S. Geological Survey. Professional paper 116. 1920. #1:/California-Professional paper 116/egh00024 ID. Eldridge, G.H. 24 West end of San Emigdio Mountains, looking eastward from foothills 1 mile west of Pioneer; refinery at extreme left, higher part of San Emigdio Mountains at right. Kern County, California. October 1901. Plate 6-C in U.S. Geological Survey. Professional paper 116. 1920. #1:/Nevada Earthquake December 16, 1954/eib00014 ID. Earthquake Information Bulletin 14 Nevada Earthquake December 16, 1954. Fault scarp near Fairview Park resulting from the earthquake. Photo by H. Benioff. Pages 26-27, Earthquake Information Bulletin, v.6, no.6. #1:/Pleasant Valley, Nevada, Earthquake 1915/eib00015 ID. Earthquake Information Bulletin 15 Pleasant Valley, Nevada, Earthquake 1915. Tobin Range, looking east. The white line at the base of the mountains is a fault scarp from the 1915 Pleasant Valley earthquake. Photo by R.E. Wallace. Page 29, Earthquake Information Bulletin, v.6, no.6. #1:/Tadzhikistan Earthquake 1949/eib00020 ID. Earthquake Information Bulletin 20 Tadzhikistan Earthquake 1949. Rising behind the village of Khait is Chokhran Mountain, down which a landslide thundered in the 1949 earthquake. The landslide scar and landslide are visible behind and to the left of Khait, respectively. Photo by R.L. Wesson. Page 12, Earthquake Information Bulletin, v.7, no.1. #1:/Peru Earthquake October 3, 1974/eib00029 ID. Earthquake Information Bulletin 29 Peru Earthquake October 3, 1974. Severe damage to adobe and quincha buildings in Chorrillos District. Hundreds of families were left homeless in the aftermath of the earthquake. 1974. Page 3, Earthquake Information Bulletin, v.7, no.2. #1:/Peru Earthquake October 3, 1974/eib00030 ID. Earthquake Information Bulletin 30 Peru Earthquake October 3, 1974. The walls of this reinforced concrete water tank located on the second floor of a building in Miraflores District collapsed. 1974. Page 4, Earthquake Information Bulletin, v.7, no.2. #1:/Peru Earthquake October 3, 1974/eib00031 ID. Earthquake Information Bulletin 31 Peru Earthquake October 3, 1974. Example of the extensive damage in La Molina District. This classroom and a laboratory building at the Agrarian University partially collapsed. 1974. Pages 6-7, Earthquake Information Bulletin, v.7, no.2. #1:/Peru Earthquake October 3, 1974/eib00032 ID. Earthquake Information Bulletin 32 Peru Earthquake October 3, 1974. This grain elevator complex in the port of Callao partially collapsed. 1974. Page 7, Earthquake Information Bulletin, v.7, no.2. #1:/Peru Earthquake October 3, 1974/eib00033 ID. Earthquake Information Bulletin 33 Peru Earthquake October 3, 1974. Lima residents wander through the desolation of their homes. 1974. Page 9, Earthquake Information Bulletin, v.7, no.2. #1:/Peru Earthquake October 3, 1974/eib00034 ID. Earthquake Information Bulletin 34 Peru Earthquake October 3, 1974. Heavily damaged building in the Lima area after the magnitude 7.6 shock. 1974. Page 11, Earthquake Information Bulletin, v.7, no.2. #1:/Lesser Antilles Earthquake 1974/eib00035 ID. Earthquake Information Bulletin 35 Lesser Antilles Earthquake 1974, October 8. Damage to a tower of St. Johns Cathedral in Antigua. Photo by J.W. Dewey, 1974. Front cover, Earthquake Information Bulletin, v.7, no.2. #1:/Earthquake Information Bulletin/eib00036 ID. Earthquake Information Bulletin 36 Garlock fault in the El Paso Mountains, west of Searles Valley. The fault is the linear feature running from left to right. San Bernardino County, California. ca. 1978. Cover of in U.S. Geological Survey. Earthquake Information Bulletin.v. 10 no. 5, September-October 1978. #1:/Lesser Antilles Earthquake 1974/eib00038 ID. Earthquake Information Bulletin 38 Lesser Antilles Earthquake 1974, October 8. Interior damage to the Anglican church in Barbuda. Photo by J.W. Dewey, 1974. Page 14, Earthquake Information Bulletin, v.7, no.2. #1:/Lesser Antilles Earthquake 1974/eib00041 ID. Earthquake Information Bulletin 41 Lesser Antilles Earthquake 1974, October 8. Ruptured tanks at the West Indies oil refinery. Crude oil has collected in containment ponds around the tanks. Photo by J.W. Dewey, 1974. Page 17, Earthquake Information Bulletin, v.7, no.2. #1:/Idaho Earthquake March 27, 1975/eib00054 ID. Earthquake Information Bulletin 54 Idaho Earthquake March 27, 1975. Ruptured grain bin in Pocatello Valley. The bin was full of grain at the time of the. Photo by A.M. Rogers, 1975. Back cover, Earthquake Information Bulletin, v.7, no.3. #1:/Alaska Earthquake March 27, 1964/eib00061 ID. Earthquake Information Bulletin 61 Alaska Earthquake March 27, 1964. Landslide effects in Turnagain Heights in Anchorage. 1964. #1:/Oroville, Butte County, California, Earthquakes August 1975/eib00062 ID. Earthquake Information Bulletin 62 Oroville, Butte County, California, Earthquakes. Oroville cemetery gravestone rotated on its base by the quake series of August 1975. 1975. Page 3, Earthquake Information Bulletin, v.7, no.5. #1:/Burma Earthquake July 8, 1975/eib00070 ID. Earthquake Information Bulletin 70 Burma Earthquake July 8, 1975. Destroyed temples at Pagan. Page 20, Earthquake Information Bulletin, v.7, no.5. #1:/China Earthquake 1556/eib00075 ID. Earthquake Information Bulletin 75 China Earthquake 1556. The Big Goose Pagoda in Sian lost its top but survived the earthquake that struck in 1556, when at least 820,000 people were killed. Damage to the corners of structure also resulted from earthquakes. Photo by R.M. Hamilton. Page 7, Earthquake Information Bulletin, v.7, no.6. #1:/Turkey Earthquake September 6, 1975/eib00079 ID. Earthquake Information Bulletin 79 Turkey Earthquake September 6, 1975. Totally collapsed house in Lice. Photo by P.I. Yanev. Front cover, Earthquake Information Bulletin, v.8, no.2. #1:/Turkey Earthquake September 6, 1975/eib00080 ID. Earthquake Information Bulletin 80 Turkey Earthquake September 6, 1975. Police building in Lice. The lower story is very severely damaged, while the second story is less damaged. Photo by P.I. Yanev. Page 5, Earthquake Information Bulletin.v.8, no.2. #1:/Turkey Earthquake September 6, 1975/eib00081 ID. Earthquake Information Bulletin 81 Turkey Earthquake September 6, 1975. Partial collapse of a more substantial building in Lice. Page 6, Earthquake Information Bulletin, v.8, no.2. #1:/Turkey Earthquake September 6, 1975/eib00082 ID. Earthquake Information Bulletin 82 Turkey Earthquake September 6, 1975. The separations between the blocks form an interesting spiral pattern on this column at an Islamic temple in Lice. Photo by P.I. Yanev. Page 7 , Earthquake Information Bulletin, v.8, no.2. #1:/Turkey Earthquake September 6, 1975/eib00083 ID. Earthquake Information Bulletin 83 Turkey Earthquake September 6, 1975. All lateral resisting elements of the wall on both floors of this high school building in Lice are shattered. Photo by P.I. Yanev. Page 8 , Earthquake Information Bulletin, v.8, no.2. #1:/Turkey Earthquake September 6, 1975/eib00084 ID. Earthquake Information Bulletin 84 Turkey Earthquake September 6, 1975. Interior damage in a high school building in Lice. Photo by P.I. Yanev. #1:/Turkey Earthquake September 6, 1975/eib00093 ID. Earthquake Information Bulletin 93 Turkey Earthquake September 6, 1975. A high school building in Lice with structural damage after the earthquake. Photo by P.I. Yanev. Back cover, Earthquake Information Bulletin, v.8, no.2. #1:/Guatemala Earthquake 1976/eib00094 ID. Earthquake Information Bulletin 94 Guatemala Earthquake 1976. "Mole track" across the soccer field at Gualan consisting of en echelon fissures and connecting pressure ridges along the trace of the Motagua fault. Displacement at this locality is over 3 feet (93 centimeters) left lateral. 1976. #1:/Guatemala Earthquake 1976/eib00095 ID. Earthquake Information Bulletin 95 Guatemala Earthquake 1976. Typical appearance of the Motagua fault rupture that caused the destructive earthquake. Page 7, Earthquake Information Bulletin, v.8, no.3. #1:/Point Reyes National Seashore/eib00097 ID. Earthquake Information Bulletin 97 Point Reyes National Seashore, California. Fence at Skinner Ranch offset by the San Francisco earthquake of April 18, 1906. Some of these buildings are still in use as part of the headquarters of Point Reyes National Seashore. Photo by J.C. Branner, 1906. Page 9, U.S. Earthquake Information Bulletin, v.8, no.3. #1:/Point Reyes National Seashore/eib00098 ID. Earthquake Information Bulletin 98 Point Reyes National Seashore, California. Offset fence and ground breakage at Shafter Ranch caused by the San Francisco earthquake of April 18, 1906. Photo by J.C. Branner, April, 1906. Page 20, Earthquake Information Bulletin, v.8, no.3. #1:/Crater Lake National Park/eib00104 ID. Earthquake Information Bulletin 104 Crater Lake National Park, Oregon. Cinder Cone and part of Crater Lake, viewed from the rim. Pages 30-31, Earthquake Information Bulletin, v.8, no.3. #1:/Hawaii Earthquake November 1975/eib00120 ID. Earthquake Information Bulletin 120 Hawaii Earthquake November 1975. Surf surges through a palm grove near Halape as a result of the 7.2 magnitude earthquake. Photo by B. Morrison, November 1975. Cover, Earthquake Information Bulletin, v.8, no.6. #1:/Grand Teton National Park/eib00121 ID. Earthquake Information Bulletin 121 Grand Teton National Park, Wyoming. Grand Teton Range. Photograph courtesy of U.S. National Park Service. Pages 152-153, Earthquake Information Bulletin, v.10, no.4. #1:/Guatemala Earthquake 1976/eib00140 ID. Earthquake Information Bulletin 140 Guatemala Earthquake 1976. One of many landslides blocking the main highway from Guatemala City to El Progreso, after the February 4, 1976 earthquake. #1:/Guatemala Earthquake 1976/eib00141 ID. Earthquake Information Bulletin 141 Guatemala Earthquake 1976. Surface faulting formed during the Guatemala earthquake on the Motagua fault. Left lateral slip at this location was three- quarters of a meter. Photo by R.C. Bucknam. Front cover, Earthquake Information Bulletin, v.9, no.2. #1:/Guatemala Earthquake 1976/eib00144 ID. Earthquake Information Bulletin 144 Guatemala Earthquake 1976. Bent rails at Puerto Barrios(?) wharf caused by faulting. Photo by A.F. Espinosa. Figure 2, page 8, Earthquake Information Bulletin, v.9, no.2. #1:/Guatemala Earthquake 1976/eib00153 ID. Earthquake Information Bulletin 153 Guatemala Earthquake 1976. Repaired offset irrigation canal that crossed a surface break of the Motagua fault. The concrete patch was made about mid- March. Left lateral offset of the fracture in the patched interval is shown by arrows. Photo by R.C. Bucknam, April 18, 1976. Figure 5, page 16, Earthquake Information Bulletin, v.9, no.2. See also photo eib00154. #1:/Guatemala Earthquake 1976/eib00154 ID. Earthquake Information Bulletin 154 Guatemala Earthquake 1976. Offset concrete patch shown in photo eib00153. Photo by R.C. Bucknam, April 18, 1976. Figure 6, page 16, Earthquake Information Bulletin, v.9, no.2. #1:/Yellowstone National Park/eib00156 ID. Earthquake Information Bulletin 156 Yellowstone National Park, Wyoming. Earliest photograph of the fumarole area that later developed into Seismic Geyser in Upper Geyser Basin. Photo by G.D. Maher. Figure 2, Earthquake Information Bulletin, v.9, no.2. #1:/Yellowstone National Park/eib00157 ID. Earthquake Information Bulletin 157 Yellowstone National Park, Wyoming. Seismic Geyser in Upper Geyser Basin after initial eruptions. Note large blocks of sinter near the vent, with fine debris absent in the splashed area. Photo by G.D. Maher. Figure 3, Earthquake Information Bulletin, v.9, no.2. #/Yellowstone National Park/eib00158 ID. Earthquake Information Bulletin 158 Yellowstone National Park, Wyoming. Explosive burst just breaking the surface pool of Seismic Geyser in Upper Geyser Basin with the water level below the level of discharge. Photo by G.D. Maher, May 30, 1966. #1:/Guatemala Earthquake 1976/eib00165 ID. Earthquake Information Bulletin 165 Guatemala Earthquake 1976. Row of trees offset by 3.25 meters of movement along the Motagua fault. Photo by G.F. Plafker, 1976. #1:/San Francisco, California, Earthquake April 18, 1906/eib00166 ID. Earthquake Information Bulletin 166 San Francisco, California, Earthquake April 18, 1906. Fire following the earthquake. View is from Golden Gate Park. Front cover, Earthquake Information Bulletin, v.9, no.3. #1:/Seismology and Seismometry/eib00167 ID. Earthquake Information Bulletin 167 Seismology and Seismometry.U.S. Geological Survey National Earthquake Information Center. A develocorder records signals from fifteen stations on a continuous reel of film. This is processed by the machine and is ready for viewing within eleven minutes of an event. Photo by R. McKenzie, pre-1977. Page 10 (upper photo), Earthquake Information Bulletin, v.9, no.3. #1:/Seismology and Seismometry/eib00168 ID. Earthquake Information Bulletin 168 Seismology and Seismometry. Seismograms are read and interpreted at Berkley on a daily basis. Some are sent to the National Earthquake Information Center operated by the U.S. Geological Survey in Golden, Colorado. The record shown here is of a Richter magnitude 6.7 earthquake in the Kermadec Islands. Photo by R. McKenzie, pre-1977. Page 10 (lower photo), Earthquake Information Bulletin, v.9, no.3. #1:/Seismology and Seismometry/eib00180 ID. Earthquake Information Bulletin 180 Seismology and Seismometry. Helicorders monitor signals at a seismograph station at Berkley from stations in the University of California Seismographic Network. Photo by R. McKenzie. Back cover, Earthquake Information Bulletin, v.9, no.3. #1:/Seismology and Seismometry/eib00181 ID. Earthquake Information Bulletin 181 Seismology and Seismometry. Staff geophysicist Waverly Person points to the trace of an earthquake which triggered an alert at the U.S. Geological Survey National Earthquake Information Service in Golden, Colorado. Front cover, Earthquake Information Bulletin, v.9, no.4. #1:/Seismology and Seismometry/eib00184 ID. Earthquake Information Bulletin 184 Seismology and Seismometry. Seismograph at the U.S. Geological Survey National Earthquake Information Service in Golden, Colorado. Page 14, Earthquake Information Bulletin, v.9, no.4. #1:/Seismology and Seismometry/eib00186 ID. Earthquake Information Bulletin 186 Seismology and Seismometry. Bank of helicorders from key stations in the U.S. Seismic Network at the U.S. Geological Survey National Earthquake Information Service in Golden, Colorado. Figure 1, page 17, Earthquake Information Bulletin, v.9, no.4. #1:/Seismology and Seismometry/eib00187 ID. Earthquake Information Bulletin 187 Seismology and Seismometry. Determining the epicenter of an earthquake. Geophysicist Waverly Person (left) reads the time of first arrival of the P wave from a seismogram. Leroy Irby types the data into the computer at the U.S. Geological Survey National Earthquake Information Service in Golden, Colorado. Figure 2, page 19, Earthquake Information Bulletin, v.9, no.4. #1:/Inangahua, New Zealand, Earthquake 1968/eib00197 ID. Earthquake Information Bulletin 197 Inangahua, New Zealand, Earthquake 1968. Highway damage. Photo by L.D. Homer, New Zealand Geological Survey, 1968. #1:/Hawke's Bay, New Zealand, Earthquake February 3, 1931/eib00200 ID. Earthquake Information Bulletin 200 Hawke's Bay, New Zealand, Earthquake February 3, 1931. The Nurses' Home at the Napier Hospital after the earthquake. Page 20, Earthquake Information Bulletin, v.9, no.5. #1:/Hawke's Bay, New Zealand, Earthquake February 3, 1931/eib00201 ID. Earthquake Information Bulletin 201 Hawke's Bay, New Zealand, Earthquake February 3, 1931. Sailors searching the ruins of Napier after the earthquake. This was New Zealand's worst earthquake disaster; the death toll was 256. Pages 16-17, Earthquake Information Bulletin, v.9, no.5. #1:/Seismology and Seismometry/eib00204 ID. Earthquake Information Bulletin 204 Seismology and Seismometry. An ocean bottom seismograph of Great Britain's Institute of Oceanographic Sciences provides direct observations of earthquakes on the mid-oceanic ridges. Figure 1, page 10, Earthquake Information Bulletin, v.9, no.5. #1:/Moro Gulf, Philippines, Earthquake August 16, 1976/eib00212 ID. Earthquake Information Bulletin 212 Moro Gulf, Philippines, Earthquake August 16, 1976. Tsunami damage at Lebak, Mindanao, caused by the magnitude 7.8 earthquake. Back cover, Earthquake Information Bulletin, v.9, no.6. #1:/Ragay Gulf, Philippines, Earthquake 1973/eib00216 ID. Earthquake Information Bulletin 216 Ragay Gulf, Philippines, Earthquake 1973. Left lateral offset of the beach line (3.2 meters) at the time of the 1973 Ragay Gulf earthquake. The offset was confirmed by numerous other displaced features nearby, such as rows of coconut trees. The break followed the low pre-existing scarp. Page 9, Earthquake Information Bulletin, v.10, no.1. #/Apostle Islands National Lakeshore/eib00242 ID. Earthquake Information Bulletin 242 Apostle Islands National Lakeshore. Photo by U.S. National Park Service, Wisconsin. Pages 100-101, Earthquake Information Bulletin, v.10, no.3. #/Apostle Islands National Lakeshore/eib00295 ID. Earthquake Information Bulletin 295 Major J.W. Powell (right), second Director of the U.S. Geological Survey, with Tau-gu, a cheif of the Paiute Indians, in southern Utah, Utah. ca 1870. Published as left photo, p.43, in U.S. Geological Survey, Earthquake Information Bulletin, v.11, no.2. March-April 1979. #1:/Seismology and Seismometry/eib00297 ID. Earthquake Information Bulletin 297 Seismology and Seismometry. Replica of the first known seismometer invented by the Chinese astronomer Chang Heng (78-139 A.D.) during the Han dynasty. Photo by R.M. Hamilton. Figure 1, pages 64-65, Earthquake Information Bulletin, v.11, no.2. #1:/Iran Earthquake September 16, 1978/eib00298 ID. Earthquake Information Bulletin 298 Iran Earthquake September 16, 1978. Damage to a building in Tabas. Photo by N. Orsini. Page 71, Earthquake Information Bulletin, v.11 no.2. #1:/Seismology and Seismometry/eib00299 ID. Earthquake Information Bulletin 299 Seismology and Seismometry. Ocean bottom seismometer being launched. Page 179, Earthquake Information Bulletin, v.11, no.5. #1:/Tangshan, China, Earthquake July 28, 1976/eib00305 ID. Earthquake Information Bulletin 305 Tangshan, China, Earthquake July 28, 1976. The Tangshan People's Bank, a four- story concrete and brick building, collapsed completely during the earthquake. July 28, 1976. Portion of Figure 2, page 107, Earthquake Information Bulletin, v.11, no.3. #1:/Tangshan, China, Earthquake July 28, 1976/eib00306 ID. Earthquake Information Bulletin 306 Tangshan, China, Earthquake July 28, 1976. The Chengli Bridge in Tangshan crumpled during the earthquake. Portion of Figure 3, page 108, Earthquake Information Bulletin, v.11, no.3. #1:/Yugoslavia Earthquake April 15, 1979/eib00318 ID. Earthquake Information Bulletin 318 Yugoslavia Earthquake April 15, 1979. Damage to the Hotel Slavija in Budva. Photo by R. McGuire. #1:/Seismology and Seismometry/eib00333 ID. Earthquake Information Bulletin 333 Seismology and Seismometry. Geologist observing earthquakes at the seismograph station at the University of California, Berkley. 1980. Back cover, Earthquake Information Bulletin, v.12, no.3. #1:/San Juan, Argentina, Earthquake November 23, 1977/eib00334 ID. Earthquake Information Bulletin 334 San Juan, Argentina, Earthquake November 23, 1977. Metal wine-storage tanks that imploded at the Los Nogales Winery in Cauceta as a result of the earthquake. Photo by C. Rojahn. #1:/Alaska Earthquake March 27, 1964/eib00337 ID. Earthquake Information Bulletin 337 Alaska Earthquake March 27, 1964. Damage to houses from landslides in Turnagain Heights in Anchorage. Photo by R.A. Page. Pages 24-25 , Earthquake Information Bulletin, v.12, no.1. #1:/San Francisco, California, Earthquake April 18, 1906/eib00341 ID. Earthquake Information Bulletin 341 San Francisco, California, Earthquake April 18, 1906. Rebuilding after the earthquake. View is down a street showing construction, trolley cars, and wagons. 1906. #1:/Romania Earthquake March 4, 1977/eib00342 ID. Earthquake Information Bulletin 342 Romania Earthquake March 4, 1977. Partially collapsed reinforced concrete frame and masonry wall office and apartment buildings in Bucharest. Photo by C. Rojahn, 1977. #1:/Peru Earthquake May 31, 1970/eib00361 ID. Earthquake Information Bulletin 361 Peru Earthquake May 31, 1970. Bus and truck were completely intermeshed by the Huascaran debris avalanche. Photo by G.E. Ericksen, 1970. Pages 68-69 (upper photo), Earthquake Information Bulletin, v.12, no.2. #1:/Peru Earthquake May 31, 1970/eib00362 ID. Earthquake Information Bulletin 362 Peru Earthquake May 31, 1970. Block of granodiorite weighing 7,000 tons that was swept along by the Huascaran debris avalanche. Photo by G.E. Ericksen, circa 1970. Pages 68-69 (lower photo), Earthquake Information Bulletin, v.12, no.2. #1:/Imperial Valley, California, Earthquake October 15, 1979/eib00363 ID. Earthquake Information Bulletin 363 Imperial Valley, California, Earthquake October 15, 1979. Strike slip offset of 57 centimeters on a canal on the Imperial Fault. The concrete patch has already been cracked by post-earthquake slip. Photo by R.E. Wallace, circa 1979. Page 77, Earthquake Information Bulletin, v.12, no.2. #1:/Peru Earthquake May 31, 1970/eib00366 ID. Earthquake Information Bulletin 366 Peru Earthquake May 31, 1970. Destruction of adobe houses in central Huarez. 1970. Back cover, Earthquake Information Bulletin, v.12, no.2. #1:/San Francisco, California, Earthquake April 18, 1906/eib00416 ID. Earthquake Information Bulletin 416 San Francisco, California, Earthquake April 18, 1906. Damage. Front cover, Earthquake Information Bulletin, v.13, no.2. #1:/Point Reyes National Seashore/eib00419 ID. Earthquake Information Bulletin 419 Point Reyes National Seashore, California. Offset of the San Andreas fault at the Skinner Ranch. The 1906 scarp (marked by posts) has been eroded away. The Skinner Ranch is now the headquarters of the Point Reyes National Seashore. 1981. Page 53, Earthquake Information Bulletin, v.13, no.2. #1:/Point Reyes National Seashore/eib00420 ID. Earthquake Information Bulletin 420 Point Reyes National Seashore, California. Earthquake Trail was developed by Timothy Hall of Foothill College, Los Altos Hills. The posts on the hillside in the background mark the trace of the fault break. 1981. Pages 54-55, Earthquake Information Bulletin, v.13, no.2. #1:/Point Reyes National Seashore/eib00422 ID. Earthquake Information Bulletin 422 Point Reyes National Seashore, California. Trench developed on the medial ridge at Skinner Ranch in 1906, which by 1981 has been modified to form a bench on the hillside. Page 57 (lower photo), Earthquake Information Bulletin, v.13, no.2. #1:/Imperial Valley, California, Earthquake October 15, 1979/eib00451 ID. Earthquake Information Bulletin 451 Imperial Valley, California, Earthquake October 15, 1979. Furrows in a plowed field were offset about 11 inches by the magnitude 6.5 earthquake. Photo by D. Cavit. Back cover, Earthquake Information Bulletin, v. 13, no.3. #1:/Turkey Earthquake August 19, 1966/eib00463 ID. Earthquake Information Bulletin 463 Turkey Earthquake August 19, 1966. Collapse of a bank building in Varto after the earthquake. This was a three-story structure of reinforced concrete post- and-slab construction with walls of brick and tile. Note the thick floor slabs and steel rods in the collapsed post from which concrete has spalled. Photo by R.E. Wallace, 1966. #1:/San Francisco, California, Earthquake April 18, 1906/eib00469 ID. Earthquake Information Bulletin 469 San Francisco, California, Earthquake April 18, 1906. Union Street collapse caused by liquefaction. Pages 94-95, Earthquake Information Bulletin, v.14, no.3. #1:/Seismology and Seismometry/eib00498 ID. Earthquake Information Bulletin 498 Seismology and Seismometry. Kaoiki aftershocks recorded on a rotating drum seismograph at Desert station located within a few miles of the epicentral area of the Hawaii earthquake of November 16, 1983. Page 7 (lower photo), Earthquake Information Bulletin, v.16, no.1. #1:/Hawaii Earthquake November 16, 1983/eib00499 ID. Earthquake Information Bulletin 499 Hawaii Earthquake November 16, 1983. Automobile stuck in a road crack in the town of Volcano. Photo by J.D. Griggs. Page 8 (upper photo), Earthquake Information Bulletin, v.16, no.1. #1:/Hawaii Earthquake November 16, 1983/Hawaii Volcanoes National Park/eib00500 ID. Earthquake Information Bulletin 500 Hawaii Earthquake November 16, 1983. Earthquake damage in the library of the Hawaiian Volcano Observatory. Photo by J.D. Griggs. Page 8, Earthquake Information Bulletin, v.16, no.1. #1:/Idaho Earthquake October 28, 1983/eib00501 ID. Earthquake Information Bulletin 501 Idaho Earthquake October 28, 1983. Willow Creek at Doublespring Pass Road. Fault scarps that outline the trough (graben) produced during the earthquake. This block is, in effect, a miniature "rift valley". At least three previous displacements, accompanied by earthquakes of similar magnitude as that of October 1983, have occurred along this part of the fault within the past several thousand years. Photo by R.E. Wallace, 1983. Pages 10-11 (upper photo), Earthquake Information Bulletin, v.16, no.1. #1:/Idaho Earthquake October 28, 1983/eib00503 ID. Earthquake Information Bulletin 503 Idaho Earthquake October 28, 1983. 1983 break in the Lost River Range. The scarp follows old scarps formed by similar earthquake faulting over the last 10,000 years. Photo by R.E. Wallace, 1983. Pages 10-11 (lower photo) Earthquake Information Bulletin, v.16, no.1. #1:/Hawke's Bay, New Zealand, Earthquake February 3, 1931/eib00508 ID. Earthquake Information Bulletin 508 Hawke's Bay, New Zealand, Earthquake February 3, 1931. Temporary aid stations were set at the Napier race course, where tea and soup were dispensed. Robert Adcock is third from the left. 1931. Page 16 (lower photo), Earthquake Information Bulletin, v.16, no.1. #1:/Hawke's Bay, New Zealand, Earthquake February 3, 1931/eib00509 ID. Earthquake Information Bulletin 509 Hawke's Bay, New Zealand, Earthquake February 3, 1931. Fire-damaged buildings and cars in Napier. 1931. Page 17 (upper photo), Earthquake Information Bulletin, v.16. no.1. #1:/Hawke's Bay, New Zealand, Earthquake February 3, 1931/eib00510 ID. Earthquake Information Bulletin 510 Hawke's Bay, New Zealand, Earthquake February 3, 1931. Earthquake-damaged buildings in Napier, looking toward the Clarendon Hotel. 1931. Page 17 (lower photo), Earthquake Information Bulletin, v.16, no.1. #1:/Hawaii Earthquake November 16, 1983/Hawaii Volcanoes National Park/eib00525 ID. Earthquake Information Bulletin 525 Hawaii Earthquake November 16, 1983. Ground cracks that developed as secondary features along the rim of the Kilauea Volcano crater. Photo by J.D. Griggs, 1983. Back cover, Earthquake Information Bulletin, v.16. no.1. #1:/Idaho Earthquake October 28, 1983/eib00526 ID. Earthquake Information Bulletin 526 Idaho Earthquake October 28, 1983. This tranquil scene at Cedar Creek along the west flank of the Lost River Range in southern Idaho belies the severe ground shaking caused by the magnitude 7.3 earthquake. Visible on the left are the terraced scarps and troughs (graben) formed by the ground breakage. Photo by R.E. Wallace, 1983. Cover, Earthquake Information Bulletin, v.16, no.1. #1:/Tangshan, China, Earthquake July 28, 1976/eib00541 ID. Earthquake Information Bulletin 541 Tangshan, China, Earthquake July 28, 1976. Devastation in Tangshan after the earthquake. A few tents and temporary shelters can be seen among the debris. Photo from Hebei Provincial Seismological Bureau, 1976. Page 103, Earthquake Information Bulletin, v.15, no.3. #1:/Tangshan, China, Earthquake July 28, 1976/eib00542 ID. Earthquake Information Bulletin 542 Tangshan, China, Earthquake July 28, 1976. Row of trees along the Jixiang Road offset 5 feet by right slip on the fault. Because of the scientific significance, the site is now protected by an iron fence built by the Hebei Provincial Seismological Bureau. Photo by R.E. Wallace, September 1982. Page 104 (upper photo), Earthquake Information Bulletin, v.15. no.3. #1:/Tangshan, China, Earthquake July 28, 1976/eib00543 ID. Earthquake Information Bulletin 543 Tangshan, China, Earthquake July 28, 1976. Road at Tangshan No. 10 Middle School offset by displacement on the fault. Photo by R.E. Wallace, September 1982. Page 104 (lower photo), Earthquake Information Bulletin, v.15, no.3. #1:/Tangshan, China, Earthquake July 28, 1976/eib00544 ID. Earthquake Information Bulletin 544 Tangshan, China, Earthquake July 28, 1976. Damage at Tangshan Rolling Stock Plant. This site is being preserved as a record of the destructive forces of earthquakes. Photo by R.E. Wallace, September 1982. Page 105, Earthquake Information Bulletin, v.15, no.3. #1:/Tangshan, China, Earthquake July 28, 1976/eib00545 ID. Earthquake Information Bulletin 545 Tangshan, China, Earthquake July 28, 1976. Damage to the library of the Hebei Mine Smelting Institute. This building is being preserved as a record of what happened in the 1976 earthquake. Photo by R.E. Wallace, September 1982. Page 106, Earthquake Information Bulletin, v.15, no.3. #1:/Coalinga, California, Earthquake May 2, 1983/eib00549 ID. Earthquake Information Bulletin 549 Coalinga, California, Earthquake May 2, 1983. One of several houses which were constructed with non-reinforced brick and brick facades. Photo by K. Harms, 1983. Page 227, Earthquake Information Bulletin, v.15, no.6. #1:/Coalinga, California, Earthquake May 2, 1983/eib00550 ID. Earthquake Information Bulletin 550 Coalinga, California, Earthquake May 2, 1983. This house was constructed with non-reinforced brick and brick facade. Photo by K. Harms, 1983. Page 228, Earthquake Information Bulletin, v.15, no.6. #1:/Coalinga, California, Earthquake May 2, 1983/eib00552 ID. Earthquake Information Bulletin 552 Coalinga, California, Earthquake May 2, 1983. This house, next to the Coalinga TV Repair Shop, was constructed of non-reinforced brick and brick facades. Photo by K. Harms, 1983. Page 229, Earthquake Information Bulletin, v.15, no.6. #1:/Eby J.B. Collection-Haughey Mine/ejb00134 ID. Eby, J.B. 134 Haughey Mine, 2 miles east of Craig. Moffat County, Colorado. July 1923. #1:/Eby J.B. Collection-Haughey Mine/ejb00135 ID. Eby, J.B. 135 Closer view of Haughey Mine. Craig, Moffat County, Colorado. July 1923. #1:/Eby J.B. Collection/ejb00136 ID. Eby, J.B. 136 New steel tipple, Oak Creek. Routt County, Colorado. June 1923. #1:/Eby J.B. Collection-Everly Coal Mine/ejb00137 ID. Eby, J.B. 137 Evans Coal Mine, 3 miles southwest of Craig. Everly Coal Mine showing in the distance. Moffat County, Colorado. June 1923. #1:/Eby J.B. Collection-Walker Mine/ejb00140 ID. Eby, J.B. 140 Walker Mine, 5 miles south of Craig, Moffat County, Colorado. July 1923. #1:/Eby J.B. Collection-Miller Mine/ejb00141 ID. Eby, J.B. 141 Miller Mine in Deacon Gulch, opposite Walker Mine, 5 miles south of Craig. The mine is in about 150 feet and has very small cover. Moffat County, Colorado. July 1923. #1:/Eby J.B. Collection/ejb00143 ID. Eby, J.B. 143 Small mine under Pilot Knob, Routt County, Colorado. May 1923. #1:/Eby J.B. Collection-Ernest Gwynn Mine/ejb00158 ID. Eby, J.B. 158 Ernest Gwynn Mine. Note the long brush-covered chute. Coal slid down the long chute is hauled directly to Phippsburg for shipment. Coal intercepted at the high road is hauled to Oak Creek for shipment. The chute is about 1,000 feet long. The old chute in the foreground leads to the abandoned entry in the #7 bed. The massive white sandstone in the lower right hand corner and in the left middle distance occurs directly below "Seven Foot" coal bed. Lower Mesa Verde rocks. Routt County, Colorado. September 1923. #1:/Eby J.B. Collection/ejb00162 ID. Eby, J.B. 162 Distillation retort. Routt County, Colorado. June 1924. #1:/Eby J.B. Collection-Butcher Knife Coal Mine/ejb00163 ID. Eby, J.B. 163 Butcher Knife Coal Mine, Sec. 36, T. 7 N., R87 W. Routt County, Colorado. 1924. #1:/Eby J.B. Collection-Bear River Coal Company/ejb00165 ID. Eby, J.B. 165 Bear River Coal Company Tipple, Bear River, Routt County, Colorado. 1924. #1:/Eby J.B. Collection-New Ducey Mine/ejb00179 ID. Eby, J.B. 179 The New Ducey (Block) Mine 1/2 mile southwest of Pilot Knob, Sec. 24, T. 8N., R.87W. Routt, Colorado. 1924. #1:/Elderkin R.L. Collection/erl00005 ID. Elderkin, R.L., Jr. 5ct Natural size specimen of oil shale. Oil shale is actually a marlstone. The darker the color the higher the shale oil content. Colorado.n.d. #1:/Elderkin R.L. Collection/erl00027 ID. Elderkin, R.L., Jr. 27 Oblique aerial view of Union's oil shale operation, the main mine bench is in the background. The foreground is probably the site of its ventilation tunnel. Garfield County, Colorado. August 27, 1981. #1:/Elderkin R.L. Collection/erl00030 ID. Elderkin, R.L., Jr. 30 Geokinetics site where they are developing a true insitu shale oil recovery method. The piping over the retort is visible in right center. Uintah County, Utah. August 27, 1981. #1:/Elderkin R.L. Collection/erl00031 ID. Elderkin, R.L., Jr. 31 Battlement Mesa, under construction, Colorado River on the right. Garfield County, Colorado. August 27, 1981. #1:/Elderkin R.L. Collection/erl00034 ID. Elderkin, R.L., Jr. 34 Oblique aerial view of the production shaft and service shaft headframes on oil shale prototype tract C-b. Rio Blanco County, Colorado. August 27, 1981. #1:/Elderkin R.L. Collection/erl00035 ID. Elderkin, R.L., Jr. 35 "Big Squirt" rainbird sprinkler irrigation system being used to dispose of excess mine water on oil shale prototype tract C-b. Rio Blanco County, Colorado. August 27, 1981. #1:/Elderkin R.L. Collection/erl00036 ID. Elderkin, R.L., Jr. 36 Oblique aerial view of oil shale prototype tract C-b with ventilation/escape shaft headframe in foreground. Rio Blanco County, Colorado. August 27, 1981. #1:/Elderkin R.L. Collection-Colony Plant/erl00039 ID. Elderkin, R.L., Jr. 39 Oblique aerial view of initial dirt moving for the Colony plant site. Garfield County, Colorado. August 27, 1981. #1:/Elderkin R.L. Collection/erlc0002 ID. Elderkin, R.L., Jr. 2cp Oblique aerial view of surface site development on oil shale prototype tract C-a. Rio Blanco County, Colorado. May 31, 1978. #1:/Elderkin R.L. Collection-Oil Shale Development/erlc0003 ID. Elderkin, R.L., Jr. 3cp Oblique aerial view of surface site development on oil shale prototype tract C-a. Rio Blanco County, Colorado. May 31, 1978. #1:/Elderkin R.L. Collection-Oil Shale Development/erlc0004 ID. Elderkin, R.L., Jr. 4cp Oblique aerial view of surface site development on oil shale prototype tract C-a. Rio Blanco County, Colorado. May 31, 1978. #1:/Elderkin R.L. Collection-Oil Shale Development/erlc0006 ID. Elderkin, R.L., Jr. 6cp Oblique aerial view of surface site development on oil shale prototype tract C-a. Rio Blanco County, Colorado. July 6, 1978. #1:/Elderkin R.L. Collection-Oil Shale Development/erlc0010 ID. Elderkin, R.L., Jr. 10cp Oblique aerial view of surface site development on oil shale prototype tract C-a. Rio Blanco County, Colorado. September 27, 1978. #1:/Elderkin R.L. Collection-Oil Shale Development/erlc0011 ID. Elderkin, R.L., Jr. 11cp Oblique aerial view of surface site development on oil shale prototype tract C-a. Rio Blanco County, Colorado. September 27, 1978. #1:/Elderkin R.L. Collection-Oil Shale Development/erlc0017 ID. Elderkin, R.L., Jr. 17cp Oblique aerial view of surface site development on oil shale prototype tract C-a. Rio Blanco County, Colorado. May 1979. #1:/Elderkin R.L. Collection-Oil Shale Development/erlc0018 ID. Elderkin, R.L., Jr. 18cp Oblique aerial view of surface site development on oil shale prototype tract C-a. Rio Blanco County, Colorado. May 15, 1979. #1:/Elderkin R.L. Collection-Oil Shale Development/erlc0019 ID. Elderkin, R.L., Jr. 19cp Oblique aerial view of surface site development on oil shale prototype tract C-a. Rio Blanco County, Colorado. May 15, 1979. #1:/Elderkin R.L. Collection-Oil Shale Development/erlc0022 ID. Elderkin, R.L., Jr. 22cp Oblique aerial view of surface site development on oil shale prototype tract C-a. Rio Blanco County, Colorado. August 6, 1979. #1:/Elderkin R.L. Collection-Oil Shale Development/erlc0023 ID. Elderkin, R.L., Jr. 23cp Oblique aerial view of surface site development on oil shale prototype tract C-a. Rio Blanco County, Colorado. June 25, 1980. #1:/Elderkin R.L. Collection-Oil Shale Development/erlc0024 ID. Elderkin, R.L., Jr. 24cp Oblique aerial view of surface site development on oil shale prototype tract C-b. Rio Blanco County, Colorado. April 28, 1978. #1:/Elderkin R.L. Collection-Oil Shale Development/erlc0025 ID. Elderkin, R.L., Jr. 25cp Oblique aerial view of surface site development on oil shale prototype tract C-b. Rio Blanco County, Colorado. May 31, 1978. #1:/Elderkin R.L. Collection-Oil Shale Development/erlc0027 ID. Elderkin, R.L., Jr. 27cp Oblique aerial view of surface site development on oil shale prototype tract C-b. Rio Blanco County, Colorado. September 27, 1978. #1:/Elderkin R.L. Collection-Oil Shale Development/erlc0028 ID. Elderkin, R.L., Jr. 28cp Oblique aerial view of surface site development on oil shale prototype tract C-b. Rio Blanco County, Colorado. May 15, 1979. #1:/Elderkin R.L. Collection-Oil Shale Development/erlc0029 ID. Elderkin, R.L., Jr. 29cp Oblique aerial view of surface site development on oil shale prototype tract C-b. Rio Blanco County, Colorado. November 16, 1979. #1:/Elderkin R.L. Collection-Oil Shale Development/erlc0031 ID. Elderkin, R.L., Jr. 31cp Oblique aerial view of surface site development on oil shale prototype tract C-b. Rio Blanco County, Colorado. May 1976. #1:/Elderkin R.L. Collection-Oil Shale Development/erlc0034 ID. Elderkin, R.L., Jr. 34cp Oblique aerial view of surface site development on oil shale prototype tract C-b. Rio Blanco County, Colorado. August 31, 1981. #1:/Elderkin R.L. Collection-Oil Shale Development/erlc0035 ID. Elderkin, R.L., Jr. 35cp Oblique aerial view of surface site development on oil shale prototype tract C-b. Rio Blanco County, Colorado. August 31, 1981. #1:/Elderkin R.L. Collection-Oil Shale Development/erlc0038 ID. Elderkin, R.L., Jr. 38cp Different Oblique aerial view of surface site development on oil shale prototype tract C-a. Rio Blanco County, Colorado. August 31, 1981. #1:/Elderkin R.L. Collection-Oil Shale Development/erlc0039 ID. Elderkin, R.L., Jr. 39cp Oblique aerial view of surface site development on oil shale prototype tract C-a. Rio Blanco County, Colorado. August 31, 1981. #1:/Elderkin R.L. Collection-Oil Shale Development/erlc0040 ID. Elderkin, R.L., Jr. 40cp Union's oil shale site with main mine bench in right foreground. Colony's plant site is visible in upper right background where initial dirt work is underway. Garfield County, Colorado. August 27, 1981. #1:/Elderkin R.L. Collection-Oil Shale Development/erlc0041 ID. Elderkin, R.L., Jr. 41cp Aerial view of Occidental's Logan Wash mine site. Upper and lower benches in left center. Gas processing facilities on ridge above. Garfield County, Colorado. August 27, 1981. #1:/Elderkin R.L. Collection-Oil Shale Development/erlc0042 ID. Elderkin, R.L., Jr. 42cp Aerial view of the new town of Battlement Mesa under construction. Garfield County, Colorado. August 27, 1981. #1:/Elderkin R.L. Collection/erlc0043 ID. Elderkin, R.L., Jr. 43cp Aerial view of site of Geokinetics true in situ test. Piping and boreholes for retort rubblization visible at lower left. Note ground cracks where rubblization has uplifted the ground surface. Uintah County, Utah. August 27, 1981. #1:/Elderkin R.L. Collection-Colony Mine/erlc0044 ID. Elderkin, R.L., Jr. 44cp Aerial view of plant site of Colony mine being developed by Exxon and TOSCO. Initial dirtwork in progress. Garfield County, Colorado. August 27, 1981. #1:/Elderkin R.L. Collection-Oil Shale Development/erlc0045 ID. Elderkin, R.L., Jr. 45cp Union's oil shale development site. Main mine bench center of photograph. Garfield County, Colorado. August 27, 1981. #1:/Loma Prieta, California, Earthquake October 17, 1989/esd00003 ID. Ellen, S.D. 3ct Loma Prieta, California, Earthquake October 17, 1989. San Francisco and San Mateo County Coast. Large slides north of Fort Funston. A ground perspective is shown in photo pdm00003. Slide IV-5, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/esd00004 ID. Ellen, S.D. 4ct Loma Prieta, California, Earthquake October 17, 1989. San Francisco and San Mateo County Coast. Large slide at Daly City. This is the largest slide encountered in San Mateo County. The base is about 152 meters (500 feet) across at its widest point, and it displaced approximately 36,700 cubic meters (48,000 cubic yards) of material. Slide IV-6.in U.S. Geological Survey Open- File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/esd00005 ID. Ellen, S.D. 5ct Loma Prieta, California, Earthquake October 17, 1989. Watsonville area. Ground shaking triggered liquefaction in a subsurface layer of sand, producing differential lateral and vertical movement in an overlying carapace of unliquified sand and silt, which moved from right to left towards the Pajaro River. This mode of ground failure is termed "lateral spreading" and is a principal architect of liquefaction-related earthquake damage. Slide XIV-4, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/esd00006 ID. Ellen, S.D. 6ct Loma Prieta, California, Earthquake October 17, 1989. Moss Landing. Differential settlement due to liquefaction caused cracking of the paved road on Paul's Island. Slide XV-3, U.S. Geological Survey Open-File Report 90-547. #1:/Fisher D.J. Collection-Farrer Mine/fdj00046 ID. Fisher, D.J. 46 Farrer Mine, Coal Canyon. Chesterfield coal. Grand County, Utah. September 10, 1925. Plate 4-B in U.S. Geological Survey. Bulletin 852. 1936. #1:/Fisher D.J. Collection-Chesterfield Coal Company/fdj00068 ID. Fisher, D.J. 68 Tipple and screening plant of Chesterfield Coal Company, old, disused washing house on left (used when mining Palisade zone seam). Sego. Grand County, Utah. August 11, 1926. #1:/Fisher D.J. Collection-Chesterfield Coal Company/fdj00069 ID. Fisher, D.J. 69 Tipple, screening plant of Chesterfield Mining Company, from across the canyon. Old washing house on right. Tracks from mine are higher ones in left center. Ballard's prospect appears in upper right at shadow made by massive (Thompson's) sandstone ledge. Shows Palisade coal, Ballard coal, Thompson Canyon sandstone, Chesterfield coal zone, Neslen member. Grand County, Utah. August 11, 1926. Plate 5-A in U.S. Geological Survey. Bulletin 852. 1926. #1:/Loma Prieta, California, Earthquake October 17, 1989/fgr00001 ID. Fisher, G.R. 1ct Loma Prieta, California, Earthquake October 17, 1989. Summit Road area in the Santa Cruz Mountains. Prominent N 15 degrees W-trending extensional cracks up to 12 centimeters (4.7 inches) wide in the concrete spillway to Austrian Dam, north abutment. Slide IX-5, U.S. Geological Survey Open-File Report 90-547. #1:/Hot Springs National Park/fml00105 ID. Fuller, M.L. 105 Hot Springs National Park, Arkansas. Man drinking by a fountain near a breccia wall cemented by hot springs deposit. Pre-1907. #1:/Hot Springs National Park/fml00106 ID. Fuller, M.L. 106 Hot Springs National Park, Arkansas. Breccia cemented by hot springs deposit. Pre-1907. #1:/New Madrid Earthquakes 1811-12/fml00137 ID. Fuller, M.L. 137 New Madrid Earthquakes 1811-12. Sand blows of the New Madrid earthquake at Blytheville, Missouri. Coalescent or linear blows obstructing drainage in the Arkansas district. 1904. #1:/New Madrid Earthquakes 1811-12/fml00140 ID. Fuller, M.L. 140 New Madrid Earthquakes 1811-12. Sand blow (sand volcano) of craterlet type in an area of disturbance at Caruthersville, Pemiscot County, Missouri. 1904. Published as plate 9-A in U.S. Geological Survey. Bulletin 494. 1912. #1:/Fuller M.L. Collection-New Madrid Earthquakes 1811-12/fml00149 ID. Fuller, M.L. 149 Sand blow (Sand Volcano) of craterlet type in area of disturbance, Caruthersville. New Madrid earthquake. Pemiscot County, Missouri. 1904. #1:/New Madrid Earthquakes 1811-12/fml00336 ID. Fuller, M.L. 336 New Madrid Earthquakes 1811-12. Earthquake fissure filled with intruded sand in Mississippi County, Missouri, formed at the time of the New Madrid earthquake. 1904. #1:/New Madrid Earthquakes 1811-12/fml00353 ID. Fuller, M.L. 353 New Madrid Earthquakes 1811-12. Landslide trench and ridge in the Chickasaw Bluffs east of Reelfoot Lake, Tennessee, resulting from the New Madrid earthquake. #1:/New Madrid Earthquakes 1811-12/fml00355 ID. Fuller, M.L. 355 New Madrid Earthquakes 1811-12. Landslide scarps in the Chickasaw Bluffs east of Reelfoot Lake, Tennessee, resulting from the New Madrid earthquake. 1904. #1:/New Madrid Earthquakes 1811-12/fml00356 ID. Fuller, M.L. 356 New Madrid Earthquakes 1811-12. Trees tilted by the New Madrid earthquake at the Chickasaw Bluffs on the east side of Reelfoot Lake, Tennessee. Note twist of trees into an upright position. #1:/New Madrid Earthquakes 1811-12/fml00362 ID. Fuller, M.L. 362 New Madrid Earthquakes 1811-12. Trees with double sets of roots. Elevated trees left by scooping out of sand by overflowing Mississippi waters at the south end of Reelfoot Lake, Tennessee. The surface is now about at its original level, and the original tree trunk can be seen continuing down to the level of the ground. Later, the tree was buried by sand to a depth of 5 feet and new roots formed. Still later, the sand was removed. 1904. #1:/Alaska/foj00003 ID. Ferrians, O.J. 3 Alaska. Ice wedge (ground ice) in permafrost exposed by placer mining near Livengood about 50 miles northwest of Fairbanks. Photo by T.L. Pewe, September 1949. #1:/Alaska/foj00012 ID. Ferrians, O.J. 12 Alaska. Differential subsidence of the road bed of the standard gauge Copper River and Northwestern Railway near Strelna, 75 miles northeast of Valdez. The thermal equilibrium of the fine grained sediments underlying the road bed was disrupted during construction, and the permafrost started to thaw differentially. Maintenance and use of the railroad was discontinued in 1938. Subsidence, as well as lateral displacement, has continued. September 1960. Figure 20, U.S. Geological Survey Professional Paper 678. #1:/Alaska/foj00016 ID. Ferrians, O.J. 16 Alaska. Gravel road near Umiat, showing severe differential subsidence caused by thawing of ice-wedge polygons in permafrost. August 1958. Figure 25, U.S. Geological Survey Professional Paper 678. #1:/Alaska/foj00021 ID. Ferrians, O.J. 21 Alaska. Frost-heaved piling of the bridge spanning the outlet of Clearwater Lake, 8 miles southeast of Big Delta. The piles are of wood. Photo by M.F. Meiser, August 1951. Figure 30, U.S. Geological Survey Professional Paper 678. #1:/Alaska/foj00022 ID. Ferrians, O.J. 22 Alaska. Frost-heaved steel-pile bridge spanning North Fork at about milepost 120 on the Kougarok Highway. Photo by G.D. Eberlein, 1955. Figure 32, U.S. Geological Survey Professional Paper 678. #1:/Alaska/foj00023 ID. Ferrians, O.J. 23 Alaska. Roadhouse at mile 278.5 of the Richardson Highway. The structure is distorted because of thawing of the underlying ice-rich permafrost in the fine grained silts and sands. May 29, 1962. Figure 33, U.S. Geological Survey Professional Paper 678. #1:/Alaska Glaciers/fre00001 ID. Fellows, R.E. 1 Looking west along McKinley Street from Broadway. Valdez district, Alaska. September 16, 1943. #1:/Alaska Glaciers/fre00002 ID. Fellows, R.E. 2 Golden North Hotel. Valdez district, Alaska. June 20, 1943. #1:/Alaska Glaciers/fre00031 ID. Fellows, R.E. 31 Alaska Glaciers. Chugach Mountains and Columbia Glacier. View north from entrance to Columbia Bay. Valdez district, Alaska. August 31, 1943. #1:/Alaska Glaciers/fre00032 ID. Fellows, R.E. 32 Alaska Glaciers. Chugach Mountains and Columbia Glacier. View from west of Heather Island. Valdez district, Alaska. August 31, 1943. #1:/Alaska Glaciers/fre00033 ID. Fellows, R.E. 33 Alaska Glaciers. Chugach Mountains and Columbia Glacier. View from approximately 1 mile south of Heather Island. Valdez district, Alaska. August 31, 1943. #1:/Alaska Glaciers/fre00034 ID. Fellows, R.E. 34 Alaska Glaciers. Front of Columbia Glacier, which is west of Valdez in the Chugach Mountains, viewed from about half a mile south of it. August 31, 1943. #1:/Alaska Glaciers/fre00035 ID. Fellows, R.E. 35 Alaska Glaciers. Columbia Glacier with float ice. View from approximately 1 mile south of Heather Island. Valdez district, Alaska. August 31, 1943. #1:/Alaska Glaciers/fre00036 ID. Fellows, R.E. 36 Alaska Glaciers. Columbia Glacier. View east-northeast showing eastern terminus of glacier front. Valdez district, Alaska. August 31, 1943. #1:/Alaska Glaciers/fre00037 ID. Fellows, R.E. 37 Alaska Glaciers. Columbia Glacier. View east-northeast showing eastern terminus of glacier front. Valdez district, Alaska. August 31, 1943. #1:/Alaska Glaciers/fre00038 ID. Fellows, R.E. 38 Alaska Glaciers. Columbia Glacier. View north-northeast showing western terminus of glacier front. Sculptured bergs in foreground. Valdez district, Alaska. August 31, 1943. #1:/Alaska Glaciers/fre00039 ID. Fellows, R.E. 39 Alaska Glaciers. Columbia Glacier. View north-northeast showing western terminus of glacier front. Sculptured bergs in foreground. Valdez district, Alaska. August 31, 1943. #1:/Alaska Glaciers/fre00040 ID. Fellows, R.E. 40 Alaska Glaciers. Cascade Glacier and Mt. Gilbert peak; Port Wells, Prince William Sound. View north from entrance to Barry Arm. Wells district, Alaska. August 21, 1943. #1:/Alaska Glaciers/fre00041 ID. Fellows, R.E. 41 Alaska Glaciers. Cascade Glacier with float ice in the foregound. Prince William Sound. Wells district, Alaska. August 22, 1943. #1:/Alaska Glaciers/fre00042 ID. Fellows, R.E. 42 Alaska Glaciers. Barry Glacier (left) and Coxe Glacier (right) at head of Barry Arm of Port Wells, Prince William Sound. Wells district, Alaska. August 22, 1943. #1:/Glacier Bay National Park and Preserve/fre00043 ID. Fellows, R.E. 43 Glacier Bay National Park and Preserve, Alaska. Cascade Glacier, center, with the front of Barry Glacier coming in from the right. August 22, 1943. #1:/Alaska Glaciers/fre00044 ID. Fellows, R.E. 44 Alaska Glaciers. Barry Glacier, which is east of Anchorage in the Chugach Mountains. August 22, 1943. #1:/Fischer R.P. Collection/frp00001 ID. Fischer, R.P. 1 Outcrop of the Chinle (Trc), Navajo (?) (Jn), Entrada (Je), and Morrison (Jm) formations at the west end of the Rifle mine, east side of East Rifle Creek. Rifle Creek area, Garfield County, Colorado. n.d. Plate 5 in U.S. Geological Survey. Bulletin 1101. 1960. #1:/Mount Rainier National Park/frs00001 ID. Fiske, R.S. 1 Mount Rainier National Park, Washington. Lava complex at the Sarvent Glaciers. Basaltic andesite lava flows and intercalated volcanic clastic rocks of the Ohanapecosh Formation dip gently westward. The prominent planar surface was formed by erosion of softer Ohanapecosh volcanic clastic rocks lying above the thick sequence of lava flows. Circa 1959. Figure 3, U.S. Geological Survey Professional Paper 444. #1:/Mount Rainier National Park/frs00003 ID. Fiske, R.S. 3 Mount Rainier National Park, Washington. Coarse mudflow breccia of the Ohanapecosh Formation at Governors Ridge, near the eastern edge of the Sarvent lava complex. Angular to subrounded blocks of lava form a disrupted framework in a matrix of unstratified and unsorted crystal-rich tuff-breccia. Most fragments are andesite, but the light-colored ones are rhyolite. Circa 1959. Figure 5, U.S. Geological Survey Professional Paper 444. #1:/Mount Rainier National Park/frs00011 ID. Fiske, R.S. 11 Mount Rainier National Park, Washington. Twenty-foot sequence of thin-bedded volcanic sandstones, volcanic siltstones, and tuff-breccias in the Ohanapecosh Formation on the east side of Backbone Ridge. Circa 1959. Figure 14, U.S. Geological Survey Professional Paper 444. #1:/Mount Rainier National Park/frs00012 ID. Fiske, R.S. 12 Mount Rainier National Park, Washington. Interbedded volcanic sandstone and siltstone (dark) of the Ohanapecosh Formation, viewed from the east side of Backbone Ridge. Note the prominent ripple marks in the upper half of the photograph, the load casts of sandstone bulging downward into siltstone (upper center and at the base of the stratum partly obscured by a dark stain), and abundant flattened pumice lapilli in the sandstone bed extending across the center. Circa 1959. Figure 16, U.S. Geological Survey Professional Paper 444. #1:/Mount Rainier National Park/frs00013 ID. Fiske, R.S. 13 Mount Rainier National Park, Washington. South Cowlitz Chimney, a plug of flow-banded rhyolite in the Sarvent lava complex. The south (right) side of the plug flares outward, truncating and overriding nearly horizontal bedded rocks of the Ohanapecosh Formation. The plug's sheer rock face is about 500 feet high. Circa 1959. Figure 17, U.S. Geological Survey Professional Paper 444. #1:/Mount Rainier National Park/frs00016 ID. Fiske, R.S. 16 Mount Rainier National Park, Washington. Lower part of the basal ash flow in the Stevens Ridge Formation on Backbone Ridge. The light-colored ash flow churned through soft saprolite on the pre-Stevens Ridge land surface and included fragments of the saprolite and less-weathered Ohanapecosh rocks in the lower 8 feet of the deposit. Circa 1959. Figure 22, U.S. Geological Survey Professional Paper 444. #1:/Mount Rainier National Park/frs00018 ID. Fiske, R.S. 18 Mount Rainier National Park, Washington. Remnants of the Fifes Peak Formation, 1,000 feet thick, on Unicorn Peak. Lava flows forming the cliffs alternate with less resistant volcanic sedimentary rocks. These nearly flat strata lie in the broad trough of the Unicorn Peak syncline. Rocks of the Stevens Ridge Formation lie in the foreground. Circa 1959. Figure 24, U.S. Geological Survey Professional Paper 444. #1:/Mount Rainier National Park/frs00022 ID. Fiske, R.S. 22 Mount Rainier National Park, Washington. Megascopic features of Ohanapecosh metamorphism. Sperical concentrations of laumontite in pumiceous tuff-breccia on the east side of Backbone Ridge. Note the friability of the rock. Circa 1959. Figure 28, U.S. Geological Survey Professional Paper 444. #1:/Mount Rainier National Park/frs00029 ID. Fiske, R.S. 29 Mount Rainier National Park, Washington. Unconformity between Mount Rainier lava and the Stevens Ridge Formation at Margaret Falls. The 500-foot cliff over which the cascade tumbles was carved from an intracanyon flow of Mount Rainier andesite. This flow rests on tilted tuffaceous sedimentary rocks of the Stevens Ridge Formation in the foreground. The cliff cuts diagonally across the intracanyon flow, revealing the curving contact of the flow against the wall of the old canyon that the lava filled. Columnar jointing in the lava fans out to meet the canyon wall, staying perpendicular to the cooling surface. A recent ablation moraine from Cowlitz Glacier mantles bedrock in the foreground. Circa 1959. Figure 45, U.S. Geological Survey Professional Paper 444. #1:/Mount Rainier National Park/frs00032 ID. Fiske, R.S. 32 Mount Rainier National Park, Washington. Remnants of two intracanyon flows from Mount Rainier in Stevens Canyon. Remnants of the earlier flow form Mazama Ridge and The Bench. The present Stevens Creek is entrenched 500 feet below the base of this flow at The Bench. A much younger flow rests on the present canyon floor, but it is found only on the south (left) side of Stevens Canyon. This flow, which descended through upper Stevens Canyon beyond the edge of the photograph on the right, may have followed a marginal melt-water channel along the south wall of a glacier that filled Stevens Canyon. This interpretation is also suggested by chaotic fans of curved columnar joints, perhaps formed by chilling of the lava against ice. These joints are developed all along the north side of the present remnant of the flow. The younger flow dammed Maple Creek and shifted its junction with Stevens Creek to the point about 1 mile downstream. Circa 1959. Figure 50, U.S. Geological Survey Professional Paper 444. #1:/Mount Rainier National Park/frs00033 ID. Fiske, R.S. 33 Mount Rainier National Park, Washington. South wall of Little Tahoma Peak, about 400 feet below its summit. Mudflow breccias enclosing streaks, lenses, and tongues of partly brecciated lava. Such mixed accumulations of lava and breccia probably formed from thin lava streams that were shattered by steam explosions as they glided down steep slopes and mixed with mud, slushy snow, and melt water. The dips are primary and are as much as 30 degrees. The cliff is about 100 feet high. Circa 1959. Figure 51, U.S. Geological Survey Professional Paper 444. #1:/Mount Rainier National Park/frs00035 ID. Fiske, R.S. 35 Mount Rainier National Park, Washington. Radial dike of Mount Rainier pyroxene andesite cutting volcanic breccia on Puyallup Cleaver. The dike is about 20 feet wide and shows poorly developed columnar jointing perpendicular to its walls. The headwall of Sunset Amphitheater, with its conspicuous white pumice band, is visible in the background. Circa 1959. Figure 53, U.S. Geological Survey Professional Paper 444. #1:/Guatemala Earthquake 1976/geq00001 ID. GUATEMALA EARTHQUAKE 1ct Guatemala Earthquake 1976. Map showing the relation of segments of the Motagua and Mixco faults that moved during the earthquake of February 4, 1976, (in red) to the main shock epicenter, the larger aftershock epicenters, and major structural and volcanic features in northern Central America. Circled numbers along the Motagua fault indicate selected measured sinistral displacements in centimeters. The green lines in the western part of the map area are lineaments, some of which may have undergone minor fault displacement during the earthquake. Photo by G. Plafker, 1976. Slide 1, U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00002 ID. GUATEMALA EARTHQUAKE 2ct Guatemala Earthquake 1976. Graphs showing measured horizontal displacement (below) and vertical displacement (above) along the 230 kilometer length of the observed surface rupture of the Motagua fault. Displacement across the fault is sinistral (left-lateral) and is almost entirely horizontal with the strike-slip component ranging up to 340 centimeters and averaging about 110 centimeters. Vertical displacements are variable and less than 30 percent of the horizontal displacements. Note the large lateral variations in both horizontal and vertical slip. Photo by G. Plafker, 1976. Slide 2, U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00003 ID. GUATEMALA EARTHQUAKE 3ct Guatemala Earthquake 1976. Westward along the Motagua fault trace in the area of maximum displacement 33 kilometers northeast of Guatemala City. The fault trace is marked by a zone less than 3 meters wide of en echelon linear cracks with connecting short pressure ridges. There is an en echelon offset of several meters where the fault crosses the creek in the upper part of the slide. The meandering creek does not follow the trace of the fault, which suggests that the fault rupture is geologically young at this locality. Photo by S.B. Bonis, Guatemala Geological Survey, 1976. Slide 3, U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00004 ID. GUATEMALA EARTHQUAKE 4ct Guatemala Earthquake 1976. Disrupted stone fence (located in the part of the area shown in photo geq00003). The fence here is offset 280 centimeters in a sinistral sense and 65 centimeters vertically with the south side relatively downthrown. View is north. Photo by G. Plafker, 1976. Slide 4, U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00005 ID. GUATEMALA EARTHQUAKE 5ct Guatemala Earthquake 1976. Southward along a row of trees offset about 3.25 meters in a sinistral sense where it is intersected by the Motagua fault. The amount of offset is indicated by the distance between the row of trees on the right and the stake at which the man points. The stake is aligned with the row of trees in the background. The fault here is a single fissure oriented perpendicular to the line of trees; there is no measurable vertical displacement. Photo by G. Plafker, 1976. Slide 5, U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00006 ID. GUATEMALA EARTHQUAKE 6ct Guatemala Earthquake 1976. Broad zone of a en echelon fissures along the Motagua fault trace where it passes through the village of Subinal (7 kilometers west of El Progreso). The fissure zone, which is roughly 9 meters wide, extends across the lower part of the slide. Note the complete destruction of the adobe structure. Photo by S.B. Bonis, Guatemala Geological Survey, 1976. Slide 6, U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00008 ID. GUATEMALA EARTHQUAKE 8ct Guatemala Earthquake 1976. Slickensided shear zone that dips 80 degrees north along the margin of the shear zone shown in a highway cut near El Progreso. The grooves on this fault plane plunge 10 degrees west. Sinistral slip at this locality is approximately 120 centimeters. 1976. Slide 8, U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00009 ID. GUATEMALA EARTHQUAKE 9ct Guatemala Earthquake 1976. East along the linear trace of the Motagua fault (dark vertical line) in farmland west of Cabanas. Sinistral displacement in this area is approximately 90 centimeters. 1976. Slide 9, U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00011 ID. GUATEMALA EARTHQUAKE 11ct Guatemala Earthquake 1976. North along rows in a cultivated field west of El Progreso that are offset 105 centimeters in a sinistral sense by slip on the Motagua fault. The thick, saturated surficial unconsolidated deposits have yielded by plastic deformation rather than rupture. 1976. Slide 11, U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00012 ID. GUATEMALA EARTHQUAKE 12ct Guatemala Earthquake 1976. Eastward along the trace of the Motagua fault near Zacapa, showing deformation of a thin hard adobe surface soil due to 80 centimeters sinistral slip. Note the prominent development of en echelon fissures oriented at about a 15 degree angle to the fault trace and open 27 centimeters in the foreground with connecting pressure ridges to 40 centimeters high. 1976. Slide 12, U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00013 ID. GUATEMALA EARTHQUAKE 13ct Guatemala Earthquake 1976. Northward at the Motagua fault trace where it crosses a soccer field at Gualan. Note the characteristic right-stepping en echelon fractures oriented as much as 20 degrees to the fault trace in a zone about 5 meters wide. Slip here was 89 centimeters sinistral as determined from the offset of the white sideline stripe on the right side of the field. 1976. Slide 13, U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00014 ID. GUATEMALA EARTHQUAKE 14ct Guatemala Earthquake 1976. Along Motagua fault trace where it crosses the Gualan soccer field. Note that "mole track" which is best developed in hard packed, brittle surface materials. 1976. Slide 14, U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00015 ID. GUATEMALA EARTHQUAKE 15ct Guatemala Earthquake 1976. Along railroad tracks that were kinked and offset approximately 107 centimeters in a sinistral sense where crossed by the Motagua fault, which is perpendicular to the tracks. This is one of numerous localities at which the main railroad line between the coastal port of Puerto Barrios and Guatemala City was disrupted by the faulting. 1976. Slide 15, U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00016 ID. GUATEMALA EARTHQUAKE 16ct Guatemala Earthquake 1976. Southward along a repaired railroad line that is crossed at nearly right angles by the Motagua fault in a plantation area of the lower Motagua Valley. The prominent kink in the railroad line, straight prior to the earthquake, was caused by sinistral fault displacement of approximately 130 centimeters. 1976. Slide 16, U.S. Geological Survey Open File Report 77-165. #1:/Guatemala Earthquake 1976/geq00017 ID. GUATEMALA EARTHQUAKE 17ct Guatemala Earthquake 1976. South along a concrete lined irrigation canal just east of Gualan that was broken and offset approximately 93 centimeters in a sinistral sense by the Motagua fault, which trends perpendicular to the canal. Many irrigation works in the Motagua Valley were damaged by movement on the fault. 1976. Slide 17 , U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00018 ID. GUATEMALA EARTHQUAKE 18ct Guatemala Earthquake 1976. Westward along the Motagua fault trace in the lower Motagua Valley. The trace here is marked by the dark line of fissures extending from the creek in the foreground through the giant ceiba (balsam) tree trunk and then along a prominent north facing scarp in the background. The tree was split and toppled by fault movement of at least 72 centimeters sinistral and 37 centimeters down to the north displacement. The vegetation- covered north facing scarp behind the tree, which is 5 meters high, was probably formed by many repeated earlier movements along this same trace. 1976. Slide 18, U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00019 ID. GUATEMALA EARTHQUAKE 19ct Guatemala Earthquake 1976. Trunk of ceiba tree (in photo geq00018) which was split and toppled by faulting. Slide 19, U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00020 ID. GUATEMALA EARTHQUAKE 20ct Guatemala Earthquake 1976. North-showing drainage ditch along highway CA-10 north of Zacapa offset by 60 centimeters sinistral and about 5 centimeters south side down vertical displacement of the Motagua fault. The man on the road is standing on the fault trace, which passes at almost right angles to the highway. Photo taken on February 8, 1976, four days after the earthquake. Slide 20, U.S. Geological Survey Open-File Report 77-165. See also geq00021. #1:/Guatemala Earthquake 1976/geq00021 ID. GUATEMALA EARTHQUAKE 21ct Guatemala Earthquake 1976. Photo taken from the same point as photo geq00020, showing effects of additional slip (afterslip) amounting to approximately 18 centimeters that occurred in the interval between February 8 and April 16, 1976, when this photograph was taken. Afterslip that occurred as small increments during aftershocks was a common phenomenon along parts of the Motagua fault and was still going on in late October by which time horizontal displacement at this locality had increased an additional 6 to 84.5 centimeters. Slide 21, U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00022 ID. GUATEMALA EARTHQUAKE 22ct Guatemala Earthquake 1976. Map of Guatemala City and environs showing the locations of the larger secondary faults of the Mixco zone associated with the February 4 earthquake (solid and dashed lines). Also shown are major faults (dotted lines) delineated by geologic mapping in the area prior to the earthquake. All of the faults in this area are predominantly normal dip-slip faults with both down to the east and down to the west displacements. Numbers along fault traces indicate the maximum measured vertical displacement in centimeters. The distributive 1976 secondary faulting occurs within a broad graben as indicated in the schematic structure section (A-A'). Slide 22, U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00023 ID. GUATEMALA EARTHQUAKE 23ct Guatemala Earthquake 1976. Fault rupture of a road curb in a new subdivision north of Mixco. Displacement at this locality is 12 centimeters down to the east and about 5 centimeters dextral (right lateral) or about 13 centimeters of oblique slip. Faults such as this one caused extensive damage to underground utilities as well as surface structures. 1976. Slide 23, U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00024 ID. GUATEMALA EARTHQUAKE 24ct Guatemala Earthquake 1976. Offset road and repaired curb at the same locality shown in photo geq00023. Displacement occurred at the base of a degraded 6- meter high east-facing scarp which developed by previous movement along this same fault line during the Quaternary Period. 1976. Slide 24, U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00025 ID. GUATEMALA EARTHQUAKE 25ct Guatemala Earthquake 1976. Southward along the same fault trace in photo geq00024, showing down dropped brown weathering soil horizon (left) juxtaposed against gray unweathered Pleistocene tephra. The east-dipping slope, which has been partly modified at the lower part by road construction, is a degraded scarp. 1976. Slide 25, U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00026 ID. GUATEMALA EARTHQUAKE 26ct Guatemala Earthquake 1976. Damage to a house in a suburb of Guatemala City due to approximately 12 centimeters vertical displacement. The roof, foundation, and sidewalk have been disrupted along a fault that trends from the lower right corner diagonally across the view. 1976. Slide 26, U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00027 ID. GUATEMALA EARTHQUAKE 27ct Guatemala Earthquake 1976. South along a secondary fault of the Mixco zone that intersects an excavation for a sedimentation basin in Guatemala City's new water treatment plant. The fault, which dips 60 degrees west (to the right) is visible in the wall of the excavation in the background and was exposed in the line of pits in the floor of the excavation. Soil horizons in the Pleistocene tephra in the wall of the excavation are offset at least 7 meters, indicating repeated movement on this same strand during late Quaternary time. Because of the faulting, the design of the settling basin had to be changed to avoid the fault trace. Available information suggests that at least part of the 5 centimeters displacement at this locality occurred during a large aftershock (body wave magnitude equal to 5.8) on February 6, 1976, which was strongly felt in the Mixco-Guatemala area. 1976. Slide 27, U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00028 ID. GUATEMALA EARTHQUAKE 28ct Guatemala Earthquake 1976. One of hundreds of open cracks that break the pavement of the Interamerican Highway in the area west of Guatemala City between Chimaltenango and Tec pan. The occurrence of these cracks, some of which had vertical displacements of up to 3 centimeters in areas of very high aftershock activity and extreme damage, suggest that some of the cracking may reflect secondary faults at depth. 1976. Slide 28, U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00029 ID. GUATEMALA EARTHQUAKE 29ct Guatemala Earthquake 1976. Landslides in steep roadcut of stratified pumice and ash deposits at the San Cristobal subdivision west of Guatemala City. The materials exposed in this roadcut are typical of much of the Pleistocene tephra deposits that extensively underlie inhabited parts of the Guatemalan highlands. 1976. Slide 29, U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00031 ID. GUATEMALA EARTHQUAKE 31ct Guatemala Earthquake 1976. Northeastward along Rio Pixcaya (due north of Chimaltenango), showing area of especially numerous landslides in tephra deposits. The river was partially dammed by a major debris flow that can be seen in the middle distance. 1976. Slide 31, U.S. Geological Survey Open- File Report 77-165. See also photo geq00020. #1:/Guatemala Earthquake 1976/geq00032 ID. GUATEMALA EARTHQUAKE 32ct Guatemala Earthquake 1976. Landslide-dammed lake along Rio Pixcaya (shown in photo geq00031). The toe of the slide had been breached by the river at the time this photo was taken on February 13, 1976. Slide 32, U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00033 ID. GUATEMALA EARTHQUAKE 33ct Guatemala Earthquake 1976. Landslides and extensive headwall cracks developed along the edge of a steep walled valley in a Guatemala City suburb. 1976. Slide 33, U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00034 ID. GUATEMALA EARTHQUAKE 34ct Guatemala Earthquake 1976. Foundation failure due to a landslide beneath structures built along the edge of a steep walled valley in Guatemala City. An estimated 5,000 dwellings in this city were made uninhabitable or were threatened by sliding. 1976. Slide 34, U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00036 ID. GUATEMALA EARTHQUAKE 36ct Guatemala Earthquake 1976. Farmland along the Rio Motagua in the lower Motagua Valley, showing lines of light-colored sand that was ejected with water from fissures during the earthquake shaking. 1976. Slide 36, U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00037 ID. GUATEMALA EARTHQUAKE 37ct Guatemala Earthquake 1976. Sand mound deposited by spouting from the row of crater-like vents that can be seen in the foreground. The slide was taken in the lower Motagua Valley in the same general area as photo geq00036. 1976. Slide 37, U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00038 ID. GUATEMALA EARTHQUAKE 38ct Guatemala Earthquake 1976. Ground cracks in unconsolidated alluvial deposits along the Motagua River north of Quebradas in the lower Motagua Valley. The cracks are believed to result from liquefaction of the water-saturated sediments with resultant spreading and slumping towards the river channel. Photo by S.B. Bonis, Guatemala Geological Survey, 1976. Slide 38, U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00039 ID. GUATEMALA EARTHQUAKE 39ct Guatemala Earthquake 1976. Cracks in unconsolidated deposits along the Motagua River shown in photo geq00038. There is both extension towards the free face and down stepping towards the river. 1976. Slide 39, U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00040 ID. GUATEMALA EARTHQUAKE 40ct Guatemala Earthquake 1976. One of many large cracks in a delta at Lake Amatitlan (20 kilometers south of Guatemala City) opened as a result of Earthquake-induced liquefaction of a near surface layer of saturated pumice sand and lateral spreading of the surficial deposits towards the lake. Such cracks caused serious damage where they intersected structures such as the one in the foreground. The front portion of the house in the background sank into the liquefied sand, tilting the brick chimney. Photo by S.B. Bonis, Guatemala Geological Survey, 1976. Slide 40, U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00041 ID. GUATEMALA EARTHQUAKE 41ct Guatemala Earthquake 1976. Swimming pool on the shore of Lake Atitlan (65 kilometers west of Guatemala City) that was destroyed when deltaic deposits on which it was built liquefied during the earthquake and flowed (or slid) into the lake. Ground cracks and local sand spout deposits occur in the lawn behind the pool. 1976. Slide 41, U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00042 ID. GUATEMALA EARTHQUAKE 42ct Guatemala Earthquake 1976. San Martin Jilotepeque, a typical highland village, located 33 kilometers northwest of Guatemala City that was devastated by the February 4 earthquake. Traditional adobe houses with tile roofs were almost completely destroyed, but the school buildings made of reinforced concrete block and corrugated asbestos roofs in the right part of this view are essentially undamaged. 1976. Slide 42, U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00043 ID. GUATEMALA EARTHQUAKE 43ct Guatemala Earthquake 1976. Typical street view in Patzicia, showing adobe block rubble which is all that remains of the houses that formerly lined this street. The adobe block buildings had very little resistance to horizontal forces and most of them were completely destroyed. Collapse of the heavy adobe walls, roof tiles and beams caused most of the casualties. Many of the adobe blocks are still intact but the mortar between the blocks failed during the seismic shaking. 1976. Slide 43, U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00044 ID. GUATEMALA EARTHQUAKE 44ct Guatemala Earthquake 1976. Southward of a newer part of Guatemala City where shaking damage was relatively light. Few of the typical reinforced concrete homes and multistoried buildings in this area were significantly damaged, and there were no building collapses or casualties. 1976. Slide 44, U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00045 ID. GUATEMALA EARTHQUAKE 45ct Guatemala Earthquake 1976. Collapsed part of the Hotel Terminal in downtown Guatemala City. Part of this structure, which is a reinforced concrete frame, flat slab, six-story building, collapsed owing to failure of several columns at the third floor. Although the building was fully occupied, collapse occurred slowly enough that the floor could be evacuated without casualties. 1976. Slide 45, U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00046 ID. GUATEMALA EARTHQUAKE 46ct Guatemala Earthquake 1976. Collapse of the dormitory-classroom unit of the newly built Catholic boy's school, Collegio San Javier, owing to the failure of some second story columns in the part of the building on the right. This three-story framed, reinforced concrete structure was designed and built to California Seismic Code specifications. There could have been major loss of life in these flattened second floor classrooms had the earthquake occurred during the day, rather than at night. 1976. Slide 46, U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00047 ID. GUATEMALA EARTHQUAKE 47ct Guatemala Earthquake 1976. Collapse of three spans of the Agua Caliente bridge on the road to the Atlantic Ocean. This bridge was constructed in 1959, and its loss, together with many landslides, cut the highway connection to the Atlantic. Several large railroad and highway bridges were badly damaged but did not collapse. 1976. Slide 47, U.S. Geological Survey Open- File Report 77-165. #1:/Guatemala Earthquake 1976/geq00049 ID. GUATEMALA EARTHQUAKE 49ct Guatemala Earthquake 1976. Part of the Mayan site of Mixco Viejo near the Motagua fault trace. This archaeological site, which had been recently beautifully restored by the Guatemalan government was severely damaged by the earthquake of February 4, 1976. Mound structures and stone walls visible in this view have been cracked and in many cases crumbled as a result of the seismic shaking. 1976. Slide 49, U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00050 ID. GUATEMALA EARTHQUAKE 50ct Guatemala Earthquake 1976. A Mayan stele at Quirigua in the Motagua Valley that cracked near the base as a result of rocking during the February 4, 1976, earthquake. The wooden braces were installed to protect the stele from further damage by seismic shaking during the aftershock sequence. 1976. Slide 50, U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00051 ID. GUATEMALA EARTHQUAKE 51ct Guatemala Earthquake 1976. Pacaya volcano 25 kilometers south of Guatemala City during an ash eruption shortly after the February 4, 1976, earthquake. Although the amount of ash erupted from the volcano may have increased slightly as a result of the earthquake, the apparent increase is well within the limits of the variation in the volcano's activity that had been observed for roughly a year prior to the earthquake. 1976. Slide 51, U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00052 ID. GUATEMALA EARTHQUAKE 52ct Guatemala Earthquake 1976. Map showing the Motagua faulted in relation to the boundaries of the Cocos and Caribbean plates. Large arrows indicate the relative plate movement directions, and numbers in parentheses indicate the inferred annual rate of movement in centimeters. The Motagua fault is part of the transform fault system that comprises the northern boundary of the Caribbean plate. Plate boundaries and motions from Jordan, T.H., 1976: Journal of Geophysical Research, v.80, p.4433-4439. Susan Hunt drafted this figure. 1976. Slide 52, U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00053 ID. GUATEMALA EARTHQUAKE 53ct Guatemala Earthquake 1976. A suggested model showing combined relative movement between the North American (green), Cocos (blue), and Caribbean (yellow and orange) plates and within the Caribbean plate to account for the complex tectonics of northern Middle America. Predominantly extensional faulting (blue zones) has caused fragmentation of the western part of the Caribbean plate. As a consequence, the northern part of the plate (yellow) may be decoupling from the southern part (orange) along the major northwest- southeast trending system of graben that follows the volcanoes (black dots) of the Middle America arc. White arrows show directions and relative amounts of long term movements of the plates and plate fragments; black arrows, relative movements along the Motagua fault system. Susan Hunt drafted this figure. 1976. Slide 53, U.S. Geological Survey Open-File Report 77-165. #1:/Guatemala Earthquake 1976/geq00054 ID. GUATEMALA EARTHQUAKE 54ct Guatemala Earthquake 1976. Block diagram showing the relation of the Motagua fault zone and the inferred zone of decoupling within the Caribbean plate to major tectonic and volcanic elements in Guatemala and contiguous countries. Guatemala is subject to earthquakes that are generated by movement on 1.) the transform fault system between the North American and Caribbean plates (which includes the toe of the Motagua fault), 2) the mega thrust zone between the Cocos and Caribbean plates, 3) extensional faults within the Caribbean plate, and by 4) earthquakes associated with volcanism along the Middle America volcanic chain. Susan Hunt drafted this figure. Slide 54, U.S. Geological Survey Open-File Report 77-165. #1:/Ubari Sand Sea, Libya/ggh00006 ID. Goudarzi, G.H. 6 Ubari Sand Sea, Libya. Typical scene in the Ubari Sand Sea, which covers an area of about 80,000 square kilometers. Circa 1958. Figure 6, U.S. Geological Survey Professional Paper 660. #1:/Ubari Sand Sea, Libya/ggh00011 ID. Goudarzi, G.H. 11 Ubari Sand Sea, Libya. High dunes in the Ubari Sand Sea. The dunes in the right foreground are more than 200 meters (about 700 feet) high. The village of Gabre Oun and the saline lake seen at the base of the dunes are about 45 kilometers west-northwest of Umn Al Abyad, Libya. October 1956. Figure 10, U.S. Geological Survey Professional Paper 660. #1:/Ubari Sand Sea, Libya/ggh00013 ID. Goudarzi, G.H. 13 Ubari Sand Sea, Libya. Longitudinal dunes in the Ubari Sand Sea about 30 kilometers southwest of Brach, looking northeast. The dunes are several kilometers long, and some are more than 100 meters high. Parallel longitudinal dunes can be seen in the foreground. Dune trends are N. 40 degrees to 45 degrees east. The slightly shadowed areas between the dunes are thought to be blowouts; the dark spots are vegetation. Circa 1958. Figure 12, U.S. Geological Survey Professional Paper 660. #1:/Ubari Sand Sea, Libya/ggh00019 ID. Goudarzi, G.H. 19 Ubari Sand Sea, Libya. Playa lake in Fezzan. This saline lake at Nashnusha, about 60 kilometers northwest of Umm Al Abyad in the Ubari Sand Sea, dries up in the summer. In the background are the high sand dunes in step from several tens of meters high. To the right of center are the deposits of sodium carbonate in the bottom of the lake. The striped pattern results from troughs dug in the lake to concentrate the sodium carbonate. Circa 1958. Figure 16-B, U.S. Geological Survey Professional Paper 660. #1:/Idaho/ggk00201 ID. Gilbert, G.K. 201 Idaho. Ferry with the Harriman party on the Snake River above the Shoshone Falls. 1899. #1:/Idaho/ggk00203 ID. Gilbert, G.K. 203 Idaho. Canyon of the Snake River below the Shoshone Falls. 1899. #1:/Idaho/ggk00204 ID. Gilbert, G.K. 204 Idaho. Canyon of the Snake River below the Shoshone Falls. 1899. #1:/Idaho/ggk00205 ID. Gilbert, G.K. 205 Idaho. Canyon of the Snake River below the Shoshone Falls. 1899. #1:/Idaho/ggk00207 ID. Gilbert, G.K. 207 Idaho. Shoshone Falls on the Snake River, viewed from the north shore. 1899. #1:/Idaho/ggk00208 ID. Gilbert, G.K. 208 Idaho. Shoshone Falls on the Snake River, viewed from the south shore. 1899. #1:/Idaho/ggk00209 ID. Gilbert, G.K. 209 Idaho. Shoshone Falls on the Snake River, viewed from the south shore. 1899. #1:/Idaho/ggk00210 ID. Gilbert, G.K. 210 Idaho. Shoshone Falls on the Snake River, viewed from the south shore. 1899. #1:/Canada/ggk00211 ID. Gilbert, G.K. 211 Canada. East side of Vancouver Island, British Columbia. 1899. #1:/Canada/ggk00212 ID. Gilbert, G.K. 212 Canada. East side of Vancouver Island, British Columbia. 1899. #1:/Canada/ggk00213 ID. Gilbert, G.K. 213 Canada. East side of Vancouver Island, British Columbia. 1899. #1:/Canada/ggk00214 ID. Gilbert, G.K. 214 Canada. East side of Vancouver Island, British Columbia. 1899. #1:/Canada/ggk00215 ID. Gilbert, G.K. 215 Canada. East side of Vancouver Island, British Columbia. 1899. #1:/Canada/ggk00216 ID. Gilbert, G.K. 216 Canada. East side of Vancouver Island, British Columbia. 1899. #1:/Canada/ggk00217 ID. Gilbert, G.K. 217 Canada. Fjord east of Pitt Island, British Columbia. 1899. #1:/Canada/ggk00218 ID. Gilbert, G.K. 218 Canada. Hanging valley on the east side of Princess Royal Island, British Columbia. 1899. #1:/Canada/ggk00219 ID. Gilbert, G.K. 219 Canada. Hanging valley on the east side of Pitt Island, British Columbia. 1899. #1:/Canada/ggk00220 ID. Gilbert, G.K. 220 Canada. South wall of Rowe Inlet, British Columbia. 1899. #1:/Canada/ggk00221 ID. Gilbert, G.K. 221 Canada. Cliff back of the salmon cannery on Rowe Inlet, British Columbia. 1899. #1:/Alaska/ggk00222 ID. Gilbert, G.K. 222 Alaska. Wharf at New Metlakatla on Annette Island in the foreground. In the distance a cape on the island constituting part of an undulating foreland. Harriman Expedition, 1899. #1:/Alaska/ggk00223 ID. Gilbert, G.K. 223 Alaska. New Metlakatla on Annette Island. Harriman Expedition, 1899. #1:/Alaska/ggk00224 ID. Gilbert, G.K. 224 Alaska. Islands in Behm Canal, which is between Bell Island and Revillagigedo Island. Harriman Expedition, 1899. #1:/Alaska/ggk00225 ID. Gilbert, G.K. 225 Alaska. Gravina Island, viewed from New Metlakatla on Annette Island. Harriman Expedition, 1899. #1:/Alaska/ggk00226 ID. Gilbert, G.K. 226 Alaska. Vegetation on the foreland of Annette Island near New Metlakatla. Uplands of the island in the distance. Harriman Expedition, 1899. #1:/Alaska/ggk00227 ID. Gilbert, G.K. 227 Alaska. Revillagigedo Island, viewed from the south. Harriman Expedition, 1899. #1:/Alaska/ggk00228 ID. Gilbert, G.K. 228 Alaska. Totem pole in Wrangell. Men are F.S. Dellenfaugh and D.G. Elliott. Harriman Expedition, 1899. #1:/Alaska/ggk00229 ID. Gilbert, G.K. 229 Alaska. Wrangell. Harriman Expedition, 1899. #1:/Alaska/ggk00230 ID. Gilbert, G.K. 230 Alaska. Wrangell. Harriman Expedition, 1899. #1:/Alaska/ggk00231 ID. Gilbert, G.K. 231 Alaska. Wrangell, viewed from the hill at rear. Harriman Expedition, 1899. #1:/Alaska/ggk00232 ID. Gilbert, G.K. 232 Alaska. Wrangell, viewed from the hill at rear. Harriman Expedition, 1899. #1:/Alaska/ggk00233 ID. Gilbert, G.K. 233 Alaska. Devils Thumb in the Coast Mountains. Harrimad, freshly deposited moraine containing some unmelted ice. Glacier Bay district, Southeastern Alaska region, Alaska. 1899. (Panorama with photo no. 243). #1:/Gilbert1899-Gilbert G.K. Collection-Alaska/ggk00234 ID. Gilbert, G.K. 234 Harriman expedition. Coastal Range, with Devils Thumb. Wrangell district, Southeastern Alaska region, Alaska. 1899. #1:/Gilbert1899-Gilbert G.K. Collection-Alaska Glaciers/ggk00235 ID. Gilbert, G.K. 235 Harriman expedition. Patterson Glacier. Wrangell district, Southeastern Alaska region, Alaska. 1899. #1:/Gilbert1899-Gilbert G.K. Collection-Alaska/ggk00236 ID. Gilbert, G.K. 236 Harriman expedition. Island west of Wrangell Narrows. Wrangell district, Southeastern Alaska region, Alaska. 1899. #1:/Alaska/ggk00237 ID. Gilbert, G.K. 237 Alaska. Icebergs in Muir Inlet. Harriman Expedition. Glacier Bay National Park and Preserve. Glacier Bay.district, Southeastern Alaska region, Alaska. 1899. #1:/Gilbert1899-Gilbert G.K. Collection-Southeastern Alaska Region-Glacier Bay District/ggk00238 ID. Gilbert, G.K. 238 Harriman expedition. Iceberg in Muir Inlet, Glacier Bay. Glacier Bay district, Southeastern Alaska region, Alaska. 1899. #1:/Gilbert1899-Gilbert G.K. Collection-Southeastern Alaska Region-Glacier Bay District/ggk00239 ID. Gilbert, G.K. 239 Harriman expedition. Icebergs in Muir Inlet, Glacier Bay. Glacier Bay district, Southeastern Alaska region, Alaska. 1899. #1:/Gilbert1899-Gilbert G.K. Collection-Southeastern Alaska Region-Glacier Bay District/ggk00240 ID. Gilbert, G.K. 240 Harriman expedition. Icebergs and hanging valleys, Muir Inlet. Glacier Bay district, Southeastern Alaska region, Alaska. 1899. #1:/Gilbert1899-Gilbert G.K. Collection-Southeastern Alaska Region-Glacier Bay District/ggk00242 ID. Gilbert, G.K. 242 Harriman expedition. Icebergs and hanging valleys, Muir Inlet. Glacier Bay district, Southeastern Alaska region, Alaska. 1899. #1:/Gilbert1899-Gilbert G.K. Collection-Southeastern Alaska Region-Glacier Bay District/ggk00243 ID. Gilbert, G.K. 243 Harriman expedition. Valley wall of Muir Inlet near foot of Muir Glacier, showing glaciation. In the foreground, freshly deposited moraine containing some unmelted ice. Glacier Bay district, Southeastern Alaska region, Alaska. 1899. (Panorama with photo no. 244). #1:/Gilbert1899-Gilbert G.K. Collection-Southeastern Alaska Region-Glacier Bay District/ggk00244 ID. Gilbert, G.K. 244 Harriman expedition. Valley wall of Muir Inlet near foot of Muir Glacier, showing glaciation. In the foreground, freshly deposited moraine containing some unmelted ice. Glacier Bay district, Southeastern Alaska region, Alaska. 1899. (Panorama with photo no. 243). #1:/Alaska/ggk00245 ID. Gilbert, G.K. 245 Alaska. Down Skagway Valley, viewed from a point on the railway. Harriman Expedition, 1899. #1:/Alaska/ggk00246 ID. Gilbert, G.K. 246 Alaska. Forest on alluvial plain near the suburbs of Skagway. Harriman Expedition, 1899. #1:/Alaska Glaciers/ggk00247 ID. Gilbert, G.K. 247 Alaska Glaciers. Davidson Glacier on Lynn Canal, southwest of Skagway in the St. Elias Mountains. Harriman Expedition, 1899. #1:/Alaska/ggk00248 ID. Gilbert, G.K. 248 Alaska. East wall of Lynn Canal, opposite Davidson Glacier, southwest of Skagway. Harriman Expedition, 1899. #1:/Alaska/ggk00249 ID. Gilbert, G.K. 249 Alaska. Peak five miles south of Davidson Glacier, southwest of Skagway. Harriman Expedition, 1899. #1:/Alaska/ggk00250 ID. Gilbert, G.K. 250 Alaska. Russian church in Sitka. Harriman Expedition, 1899. #1:/Glacier Bay National Park and Preserve/ggk00251 ID. Gilbert, G.K. 251 Glacier Bay National Park and Preserve, Alaska. Favorite Glacier, viewed from Geikie Inlet. Harriman Expedition, 1899. #1:/Glacier Bay National Park and Preserve/ggk00252 ID. Gilbert, G.K. 252 Glacier Bay National Park and Preserve, Alaska. Mount Crillon in the Fairweather Range, viewed from Hugh Miller Inlet. Harriman Expedition, 1899. #1:/Glacier Bay National Park and Preserve/ggk00254 ID. Gilbert, G.K. 254 Glacier Bay National Park and Preserve, Alaska. Grand Pacific Glacier at Reid Inlet. The mountain on the right is an island. Harriman Expedition, 1899. Photos ggk00254, ggk00255, and ggk00256 form a panorama. #1:/Glacier Bay National Park and Preserve/ggk00255 ID. Gilbert, G.K. 255 Glacier Bay National Park and Preserve, Alaska. Grand Pacific Glacier at Reid Inlet. The mountain on the right is an island. Harriman Expedition, 1899. Photos ggk00254, ggk00255, and ggk00256 form a panorama. #1:/Glacier Bay National Park and Preserve/ggk00256 ID. Gilbert, G.K. 256 Glacier Bay National Park and Preserve, Alaska. Grand Pacific Glacier at Reid Inlet. The mountain on the right is an island. Harriman Expedition, 1899. Photos ggk00254, ggk00255, and ggk00256 form a panorama. #1:/Glacier Bay National Park and Preserve/ggk00257 ID. Gilbert, G.K. 257 Glacier Bay National Park and Preserve, Alaska. Front of Reid Glacier, viewed from the south. The ice cliff is about 200 feet high and nearly 1 mile long. The waves were produced by the fall of a small iceberg. Harriman Expedition, 1899. Photos ggk00257 and ggk00258 form a panorama. #1:/Glacier Bay National Park and Preserve/ggk00258 ID. Gilbert, G.K. 258 Glacier Bay National Park and Preserve, Alaska. Front of Reid Glacier, viewed from the south. The ice cliff is about 200 feet high and nearly 1 mile long. The waves were produced by the fall of a small iceberg. Harriman Expedition, 1899. Photos ggk00257 and ggk00258 form a panorama. #1:/Glacier Bay National Park and Preserve/ggk00259 ID. Gilbert, G.K. 259 Glacier Bay National Park and Preserve, Alaska. Reid Glacier, viewed from a point north of its ice cliff. Harriman Expedition, June 12, 1899. Photos ggk00259, ggk00260, and ggk00261 form a panorama. #1:/Glacier Bay National Park and Preserve/ggk00260 ID. Gilbert, G.K. 260 Glacier Bay National Park and Preserve, Alaska. Reid Glacier, viewed from a point north of its ice cliff. Harriman Expedition, June 12, 1899. Photos ggk00259, ggk00260, and ggk00261 form a panorama. #1:/Glacier Bay National Park and Preserve/ggk00261 ID. Gilbert, G.K. 261 Glacier Bay National Park and Preserve, Alaska. Reid Glacier, viewed from a point north of its ice cliff. Harriman Expedition, June 12, 1899. Photos ggk00259, ggk00260, and ggk00261 form a panorama. #1:/Glacier Bay National Park and Preserve/ggk00262 ID. Gilbert, G.K. 262 Glacier Bay National Park and Preserve, Alaska. Charpentier Glacier. The tidal cliff of the glacier is concealed on the right. The low dark ridge lying next to the glacier is a mass of ice covered by moraine material. Twenty years earlier it was part of the glacier, but is now separating and slowly wasting. Harriman Expedition, June 11, 1899. #1:/Glacier Bay National Park and Preserve/ggk00263 ID. Gilbert, G.K. 263 Glacier Bay National Park and Preserve, Alaska. At the left of the ice cliff is a mass of dead ice. View is from an island in Hugh Miller Inlet. Harriman Expedition, June 11, 1899. Photos ggk00263 through ggk00268 form a panorama. #1:/Glacier Bay National Park and Preserve/ggk00264 ID. Gilbert, G.K. 264 Glacier Bay National Park and Preserve, Alaska. A glaciated hill between Charpentier Glacier and Hugh Miller Glacier. Harriman Expedition, June 11, 1899. Photos ggk00263 through ggk00268 form a panorama. #1:/Glacier Bay National Park and Preserve/ggk00265 ID. Gilbert, G.K. 265 Glacier Bay National Park and Preserve, Alaska. Part of Hugh Miller Glacier. The glacier has its source beyond the high mountain at left of center. Harriman Expedition, June 11, 1899. Photos ggk00263 through ggk00268 form a panorama. #1:/Glacier Bay National Park and Preserve/ggk00266 ID. Gilbert, G.K. 266 Glacier Bay National Park and Preserve, Alaska. Part of Hugh Miller Glacier. The glacier comes from the valley at the left. Harriman Expedition, June 11, 1899. Photos ggk00263 through ggk00268 form a panorama. #1:/Glacier Bay National Park and Preserve/ggk00267 ID. Gilbert, G.K. 267 Glacier Bay National Park and Preserve, Alaska. Part of High Miller Glacier. On the left the glacier is active, and ice bergs fall from its ice cliff. On the right, it is stagnant. Harriman Expedition, June 11, 1899. Photos ggk00263 through ggk00268 form a panorama. #1:/Glacier Bay National Park and Preserve/ggk00268 ID. Gilbert, G.K. 268 Glacier Bay National Park and Preserve, Alaska. Part of Hugh Miller Glacier. Harriman Expedition, June 11, 1899. Photos ggk00263 through ggk00268 form a panorama. #1:/Glacier Bay National Park and Preserve/ggk00269 ID. Gilbert, G.K. 269 Glacier Bay National Park and Preserve, Alaska. Glaciation on the shoulder of granite on the south wall of Muir Inlet. Harriman Expedition, 1899. #1:/Glacier Bay National Park and Preserve/ggk00270 ID. Gilbert, G.K. 270 Glacier Bay National Park and Preserve, Alaska. Front of Muir Glacier, viewed from the east. Morse Glacier seen in the distance. Harriman Expedition, June 9,1899. #1:/Glacier Bay National Park and Preserve/ggk00271 ID. Gilbert, G.K. 271 Glacier Bay National Park and Preserve, Alaska. Upper part of Glacier Bay. Icebergs in the foreground. Rendu Glacier in the distance. Harriman Expedition, June 11, 1899. #1:/Glacier Bay National Park and Preserve/ggk00272 ID. Gilbert, G.K. 272 Glacier Bay National Park and Preserve, Alaska. Upper part of Glacier Bay. Rendu Glacier in the distance. Harriman Expedition, June 11, 1899. #1:/Glacier Bay National Park and Preserve/ggk00273 ID. Gilbert, G.K. 273 Glacier Bay National Park and Preserve, Alaska. The iceberg projects 75 feet above the water. The nearer face, black with rock debris, was probably part of the base of the parent glacier. Harriman Expedition, 1899. #1:/Glacier Bay National Park and Preserve/ggk00274 ID. Gilbert, G.K. 274 Glacier Bay National Park and Preserve, Alaska. The iceberg in Glacier Bay projects 75 feet above the water. The nearer face, black with rock debris, was probably part of the base of the parent glacier. Harriman Expedition, 1899. #1:/Glacier Bay National Park and Preserve/ggk00275 ID. Gilbert, G.K. 275 Glacier Bay National Park and Preserve, Alaska. Iceberg in Glacier Bay. Harriman Expedition, 1899. #1:/Glacier Bay National Park and Preserve/ggk00276 ID. Gilbert, G.K. 276 Glacier Bay National Park and Preserve, Alaska. Front of Muir Glacier, viewed from the east shore of the inlet. The ice front is 250 feet high. The upper part is divided by crevasses, but these are limited downward, leaving the lower part massive. The icebergs in the foreground are stranded. Harriman Expedition, 1899. See Photo No. mbf00008 for matching pair. #1:/Glacier Bay National Park and Preserve/ggk00277 ID. Gilbert, G.K. 277 Glacier Bay National Park and Preserve, Alaska. Stranded iceberg in Muir Inlet. Harriman Expedition, 1899. #1:/Glacier Bay National Park and Preserve/ggk00278 ID. Gilbert, G.K. 278 Glacier Bay National Park and Preserve, Alaska. Glaciated rocks at Reid Inlet. Harriman Expedition, 1899. #1:/Glacier Bay National Park and Preserve/ggk00279 ID. Gilbert, G.K. 279 Glacier Bay National Park and Preserve, Alaska. Southward from Hugh Miller Inlet. The trough contains a body of stagnant ice, originally part of a glacier which occupied the whole of Hugh Miller Inlet and sent a tributary southward through the trough. Harriman Expedition, June 11, 1899. #1:/Glacier Bay National Park and Preserve/ggk00281 ID. Gilbert, G.K. 281 Glacier Bay National Park and Preserve, Alaska. Fresh-formed moraine on an island in Hugh Miller Inlet. Harriman Expedition, June 1899. #1:/Glacier Bay National Park and Preserve/ggk00283 ID. Gilbert, G.K. 283 Glacier Bay National Park and Preserve, Alaska. Toward Glacier Bay from Muir Inlet. Harriman Expedition, 1899. #1:/Glacier Bay National Park and Preserve/ggk00284 ID. Gilbert, G.K. 284 Glacier Bay National Park and Preserve, Alaska. Reid Inlet. Queen Inlet and Carroll Glacier in the distance. Harriman Expedition, 1899. #1:/Glacier Bay National Park and Preserve/ggk00285 ID. Gilbert, G.K. 285 Glacier Bay National Park and Preserve, Alaska. Floating ice in Reid Inlet. Harriman Expedition, 1899. #1:/Glacier Bay National Park and Preserve/ggk00286 ID. Gilbert, G.K. 286 Glacier Bay National Park and Preserve, Alaska. Mount Fairweather and the Fairweather Range, viewed from Reid Inlet. Harriman Expedition, 1899. #1:/Glacier Bay National Park and Preserve/ggk00287 ID. Gilbert, G.K. 287 Glacier Bay National Park and Preserve, Alaska. Mount Fairweather and the Fairweather Range, viewed from Reid Inlet. Harriman Expedition, 1899. #1:/Glacier Bay National Park and Preserve/ggk00288 ID. Gilbert, G.K. 288 Glacier Bay National Park and Preserve, Alaska. Mount Fairweather and the Fairweather Range, viewed from Reid Inlet. Harriman Expedition, 1899. #1:/Alaska/ggk00290 ID. Gilbert, G.K. 290 Alaska. The George W. Elder in Farragut Bay, which is on the northeast shore of Frederick Sound. Harriman Expedition, 1899 #1:/Glacier Bay National Park and Preserve/ggk00291 ID. Gilbert, G.K. 291 Glacier Bay National Park and Preserve, Alaska. Rocky beach on Farragut Bay. Harriman Expedition, 1899. #1:/Glacier Bay National Park and Preserve/ggk00292 ID. Gilbert, G.K. 292 Glacier Bay National Park and Preserve, Alaska. Rocky beach on Farragut Bay. Harriman Expedition, 1899. #1:/Alaska/ggk00293 ID. Gilbert, G.K. 293 Alaska. Lynn Canal, with Davidson Glacier in the distance, southwest of Skagway. Harriman Expedition, 1899. #1:/Alaska/ggk00294 ID. Gilbert, G.K. 294 Alaska. Juneau, viewed from near Douglas. Harriman Expedition, 1899. #1:/Glacier Bay National Park and Preserve/ggk00295 ID. Gilbert, G.K. 295 Glacier Bay National Park and Preserve, Alaska. Muir Glacier. Harriman Expedition, June 9, 1899. #1:/Alaska/ggk00296 ID. Gilbert, G.K. 296 Alaska. Wall of Disenchantment Bay at the head of Yakutat Bay south of Turner Glacier. Harriman Expedition, June 9, 1899. #1:/Alaska/ggk00297 ID. Gilbert, G.K. 297 Alaska. Yakutat Bay, viewed from Haenke Island in Disenchantment Bay. Harriman Expedition, 1899. #1:/Alaska Glaciers/ggk00298 ID. Gilbert, G.K. 298 Alaska Glaciers. Ice cliff of Hubbard Glacier on Disenchantment Bay, north- northeast of Yakutat in the St. Elias Mountains. Harriman Expedition, June 21, 1899. #1:/Alaska Glaciers/ggk00299 ID. Gilbert, G.K. 299 Alaska Glaciers. Turner Glacier (center) and Hubbard Glacier (right) on Disenchantment Bay, north-northeast of Yakutat in the St. Elias Mountains. Harriman Expedition, June 21, 1899. #1:/Alaska Glaciers/ggk00300 ID. Gilbert, G.K. 300 Alaska Glaciers. Hubbard Glacier, which is north-northeast of Yakutat in the St. Elias Mountains. Harriman Expedition, June 21, 1899. #1:/Alaska Glaciers/ggk00301 ID. Gilbert, G.K. 301 Alaska Glaciers. Hubbard Glacier, which is north-northeast of Yakutat in the St. Elias Mountains. Harriman Expedition, June 21, 1899. #1:/Alaska Glaciers/ggk00302 ID. Gilbert, G.K. 302 Alaska Glaciers. Cascading Glacier on the east wall of Nunatak Fiord. An arm of (East) Nunatak Glacier appears in the foreground on the left. These glaciers are northeast of Yakutat in the St. Elias Mountains. Harriman Expedition, June 20, 1899. #1:/Alaska Glaciers/ggk00303 ID. Gilbert, G.K. 303 Alaska Glaciers. Cascading Glacier on the east wall of Nunatak Fiord, near Nunatak Glacier. These glaciers are northeast of Yakutat in the St. Elias Mountains. John Muir in the photograph. Harriman Expedition, 1899. #1:/Alaska Glaciers/ggk00304 ID. Gilbert, G.K. 304 Alaska Glaciers. Cascading Glacier on the east wall of Nunatak Fiord, near Nunatak Glacier. These glaciers are northeast of Yakutat in the St. Elias Mountains. Harriman Expedition, 1899. #1:/Alaska Glaciers/ggk00305 ID. Gilbert, G.K. 305 Alaska Glaciers. Principal front of Nunatak Glacier, which is northeast of Yakutat in the St. Elias Mountains. Beyond it a hanging valley with glacier. Harriman Expedition, June 20, 1899. #1:/Alaska Glaciers/ggk00306 ID. Gilbert, G.K. 306 Alaska Glaciers. Principal front of Nunatak Glacier, which is northeast of Yakutat in the St. Elias Mountains. Beyond it a hanging valley with glacier. Harriman Expedition, June 20, 1899. #1:/Alaska Glaciers/ggk00307 ID. Gilbert, G.K. 307 Alaska Glaciers. Eastern tributary of Nunatak Glacier, which is northeast of Yakutat in the St. Elias Mountains. Harriman Expedition, June 20, 1899. #1:/Alaska/ggk00308 ID. Gilbert, G.K. 308 Alaska. Hanging valley on the east wall of Nunatak Fiord, east of Yakutat Bay in the St. Elias Mountains. Harriman Expedition, 1899. #1:/Alaska/ggk00309 ID. Gilbert, G.K. 309 Alaska. Hanging valley on the east wall of Nunatak Fiord, east of Yakutat Bay in the St. Elias Mountains. Harriman Expedition, 1899. #1:/Alaska Glaciers/ggk00310 ID. Gilbert, G.K. 310 Alaska Glaciers. Turner Glacier, which is north-northeast of Yakutat in the St. Elias Mountains, viewed from a point on the south shore of Disenchantment Bay above Osier Island. Harriman Expedition, June 21, 1899. Photos ggk00310, ggk00311, ggk00312, ggk00313, and ggk00314 form a panorama. #1:/Alaska Glaciers/ggk00311 ID. Gilbert, G.K. 311 Alaska Glaciers. Turner Glacier, which is north-northeast of Yakutat in the St. Elias Mountains, viewed from a point on the south shore of Disenchantment Bay above Osier Island. Harriman Expedition, June 21, 1899. Photos ggk00310, ggk00311, ggk00312, ggk00313, and ggk00314 form a panorama. #1:/Alaska Glaciers/ggk00312 ID. Gilbert, G.K. 312 Alaska Glaciers. Part of Hubbard Glacier, which is north-northeast of Yakutat in the St. Elias Mountains, viewed from a point on the south shore of Disenchantment Bay above Osier Island. Harriman Expedition, June 21, 1899. Photos ggk00310, ggk00311, ggk00312, ggk00313, and ggk00314 form a panorama. #1:/Alaska Glaciers/ggk00313 ID. Gilbert, G.K. 313 Alaska Glaciers. Part of Hubbard Glacier, which is north-northeast of Yakutat in the St. Elias Mountains, viewed from a point on the south shore of Disenchantment Bay above Osier Island. Harriman Expedition, June 21, 1899. Photos ggk00310, ggk00311, ggk00312, ggk00313, and ggk00314 form a panorama. #1:/Alaska Glaciers/ggk00314 ID. Gilbert, G.K. 314 Alaska Glaciers. Part of Hubbard Glacier, which is north-northeast of Yakutat in the St. Elias Mountains, viewed from a point on the south shore of Disenchantment Bay above Osier Island. Harriman Expedition, June 21, 1899. Photos ggk00310, ggk00311, ggk00312, ggk00313, and ggk00314 form a panorama. #1:/Alaska/ggk00315 ID. Gilbert, G.K. 315 Alaska. Osier Island in Disenchantment Bay, viewed from a cliff on the south. Hubbard Glacier in the distance. June 21, 1899. #1:/Alaska Glaciers/ggk00316 ID. Gilbert, G.K. 316 Alaska Glaciers. Part of Hubbard Glacier, which is north-northeast of Yakutat in the St. Elias Mountains, viewed from the south shore of Disenchantment Bay. Harriman Expedition, June 22, 1899. #1:/Alaska Glaciers/ggk00317 ID. Gilbert, G.K. 317 Alaska Glaciers. Turner Glacier, which is north-northeast of Yakutat in the St. Elias Mountains, viewed from Haenke Island in Disenchantment Bay. Harriman Expedition, June 22, 1899. #1:/Alaska Glaciers/ggk00318 ID. Gilbert, G.K. 318 Alaska Glaciers. Hubbard Glacier on Disenchantment Bay, north-northeast of Yakutat in the St. Elias Mountains, viewed from Haenke Island. Harriman Expedition, June 22, 1899. #1:/Alaska/ggk00319 ID. Gilbert, G.K. 319 Alaska. Northern part of Sitka, viewed from the pier. These houses are chiefly occupied by Indians. Harriman Expedition, 1899. #1:/Alaska/ggk00320 ID. Gilbert, G.K. 320 Alaska. Part of Sitka, viewed from the pier. Harriman Expedition, 1899. #1:/Alaska/ggk00321 ID. Gilbert, G.K. 321 Alaska. Islets in Sitka Harbor. Harriman Expedition, 1899. #1:/Alaska/ggk00322 ID. Gilbert, G.K. 322 Alaska. Islets in Sitka Harbor. Harriman Expedition, 1899. #1:/Glacier Bay National Park and Preserve/ggk00323 ID. Gilbert, G.K. 323 Glacier Bay National Park and Preserve, Alaska. Islets in Sitka Harbor. Harriman Expedition, 1899. #1:/Glacier Bay National Park and Preserve/ggk00324 ID. Gilbert, G.K. 324 Glacier Bay National Park and Preserve, Alaska. Cape Baranof near Sitka, viewed from Mount Verstovia. The foreland of the cape and the small islands are parts of an ancient peneplain. Harriman Expedition, 1899. #1:/Alaska/ggk00325 ID. Gilbert, G.K. 325 Alaska. Mount Edgecumbe west of Sitka, viewed from Mount Verstovia. Harriman Expedition, 1899. #1:/Alaska/ggk00326 ID. Gilbert, G.K. 326 Alaska. Mount Edgecumbe west of Sitka, viewed from Mount Verstovia. Harriman Expedition, 1899. #1:/Alaska/ggk00327 ID. Gilbert, G.K. 327 Alaska. Spruce forest near Sitka.B.E. Fernow in the photograph. Harriman Expedition, 1899. #1:/Alaska/ggk00328 ID. Gilbert, G.K. 328 Alaska. Mountain hemlock on Mount Verstovia east of Sitka at an altitude of 2,250 feet. Harriman Expedition, 1899. #1:/Alaska/ggk00329 ID. Gilbert, G.K. 329 Alaska. Eastward from Mount Verstovia east of Sitka. Harriman Expedition, 1899. #1:/Alaska/ggk00330 ID. Gilbert, G.K. 330 Alaska. Storm-beaten mountain hemlock near timber line on Mount Verstovia east of Sitka at an altitude of 2,600 feet. Harriman Expedition, 1899. #1:/Alaska/ggk00331 ID. Gilbert, G.K. 331 Alaska. Hemlock and cedar near Sitka. Harriman Expedition, 1899. #1:/Glacier Bay National Park and Preserve/ggk00332 ID. Gilbert, G.K. 332 Harriman expedition. Glacier Bay National Park and Preserve, Alaska. La Perouse Glacier, viewed from the beach. Harriman Expedition, June 18, 1899. #1:/Glacier Bay National Park and Preserve/ggk00333 ID. Gilbert, G.K. 333 (General Collection 2905) Glacier Bay National Park and Preserve, Alaska. Push moraine near La Perouse Glacier. Harriman Expedition, June 18, 1899. #1:/Glacier Bay National Park and Preserve/ggk00334 ID. Gilbert, G.K. 334 Glacier Bay National Park and Preserve, Alaska. Edge of La Perouse Glacier, showing relation to forest. Harriman Expedition, June 18, 1899. #1:/Glacier Bay National Park and Preserve/ggk00335 ID. Gilbert, G.K. 335 Glacier Bay National Park and Preserve, Alaska. Port Gravina on Prince William Sound. Harriman Expedition, 1899. #1:/Glacier Bay National Park and Preserve/ggk00336 ID. Gilbert, G.K. 336 Glacier Bay National Park and Preserve, Alaska. Mountains behind Columbia Glacier on Prince William Sound. Harriman Expedition, 1899. #1:/Alaska Glaciers/ggk00337 ID. Gilbert, G.K. 337 Alaska Glaciers. Columbia Bay and Columbia Glacier, which is southwest of Valdez in the Chugach Mountains. Harriman Expedition, June 25, 1899. #1:/Alaska Glaciers/ggk00338 ID. Gilbert, G.K. 338 Alaska Glaciers. Columbia Bay and Columbia Glacier, which is southwest of Valdez in the Chugach Mountains. The central mountain is a nunatak. Harriman Expedition, June 25, 1899. #1:/Alaska Glaciers/ggk00339 ID. Gilbert, G.K. 339 Alaska Glaciers. Columbia Glacier, which is southwest of Valdez in the Chugach Mountains. The ship in Columbia Bay is the George W. Elder. Harriman Expedition, June 25, 1899. #1:/Alaska Glaciers/ggk00340 ID. Gilbert, G.K. 340 Alaska Glaciers. Columbia Glacier, which is southwest of Valdez in the Chugach Mountains, viewed from a hill at the east. Columbia Bay and Heather Island. Harriman Expedition, June 26, 1899. Photos ggk00340, ggk00341, ggk00342, ggk00343, and ggk00344 form a panorama. #1:/Alaska Glaciers/ggk00341 ID. Gilbert, G.K. 341 Alaska Glaciers. End of Columbia Glacier, which is southwest of Valdez in the Chugach Mountains. Harriman Expedition, June 26, 1899. Photos ggk00340, ggk00341, ggk00342, ggk00343, and ggk00344 form a panorama. #1:/Alaska Glaciers/ggk00342 ID. Gilbert, G.K. 342 Alaska Glaciers. Columbia Glacier, which is southwest of Valdez in the Chugach Mountains. Harriman Expedition, June 26, 1899. Photos ggk00340, ggk00341, ggk00342, ggk00343, and ggk00344 form a panorama. #1:/Alaska Glaciers/ggk00343 ID. Gilbert, G.K. 343 Alaska Glaciers. Columbia Glacier, which is southwest of Valdez in the Chugach Mountains. The glacier spreads into a side valley in which there are glacial lakes. Harriman Expedition, June 26, 1899. Photos ggk00340, ggk00341, ggk00342, ggk00343, and ggk00344 form a panorama. #1:/Alaska Glaciers/ggk00344 ID. Gilbert, G.K. 344 Alaska Glaciers. Columbia Glacier, which is southwest of Valdez in the Chugach Mountains. Between the nearer and more distant hills on the left the two arms of the glacier meet, making the distant hill a nunatak. Harriman Expedition, June 26, 1899. Photos ggk00340, ggk00341, ggk00342, ggk00343, and ggk00344 form a panorama. #1:/Alaska Glaciers/ggk00345 ID. Gilbert, G.K. 345 Alaska Glaciers. Columbia Bay and Columbia Glacier, which is southwest of Valdez in the Chugach Mountains, viewed from the east. In the foreground a tundra pool was formed by the growth of a dam of moss. Harriman Expedition, June 26, 1899. #1:/Alaska Glaciers/ggk00346 ID. Gilbert, G.K. 346 Alaska Glaciers. On Columbia Glacier, which is southwest of Valdez in the Chugach Mountains. Harriman Expedition, June 26, 1899. #1:/Alaska Glaciers/ggk00347 ID. Gilbert, G.K. 347 Alaska Glaciers. Surface of a broad moraine on Columbia Glacier, which is southwest of Valdez in the Chugach Mountains. Harriman Expedition, 1899. #1:/Alaska/ggk00348 ID. Gilbert, G.K. 348 Alaska. Forest overturned by the recent advance of Columbia Glacier, southwest of Valdez in the Chugach Mountains. Harriman Expedition, 1899. #1:/Alaska/ggk00349 ID. Gilbert, G.K. 349 Alaska. Forest overturned by the recent advance of Columbia Glacier, southwest of Valdez in the Chugach Mountains. Harriman Expedition, 1899. #1:/Alaska Glaciers/ggk00350 ID. Gilbert, G.K. 350 Alaska Glaciers. Southeastern front of Columbia Glacier, which is southwest of Valdez in the Chugach Mountains. Harriman Expedition, 1899. #1:/Alaska Glaciers/ggk00351 ID. Gilbert, G.K. 351 Alaska Glaciers. Southeastern front of Columbia Glacier, which is southwest of Valdez in the Chugach Mountains. Harriman Expedition, 1899. #1:/Alaska Glaciers/ggk00352 ID. Gilbert, G.K. 352 (General Collection 2902) Alaska Glaciers. Charles Palache on a fluted moraine exposed at the front of Columbia Glacier, which is southwest of Valdez in the Chugach Mountains. Harriman Expedition, June 26, 1899. #1:/Alaska Glaciers/ggk00353 ID. Gilbert, G.K. 353 Alaska Glaciers. Charles Palache on a fluted moraine exposed at the front of Columbia Glacier, which is southwest of Valdez in the Chugach Mountains. Harriman Expedition, June 26, 1899. #1:/Alaska Glaciers/ggk00354 ID. Gilbert, G.K. 354 Alaska Glaciers. Fluted moraine and disturbed forest on the front of Columbia Glacier, which is southwest of Valdez in the Chugach Mountains. Harriman Expedition, June 26, 1899. Plate 8-A, U.S. Geological Survey Bulletin 526. #1:/Alaska Glaciers/ggk00355 ID. Gilbert, G.K. 355 Alaska Glaciers. Western margin of Columbia Glacier, which is southwest of Valdez in the Chugach Mountains, showing the relation of the glacier to standing forest. Harriman Expedition, June 27, 1899. Plate 7-A, U.S. Geological Survey Bulletin 526. #1:/Alaska Glaciers/ggk00356 ID. Gilbert, G.K. 356 Alaska Glaciers. Push moraine of Columbia Glacier on the west shore of Columbia Bay, southwest of Valdez in the Chugach Mountains. Harriman Expedition, June 27, 1899. #1:/Alaska Glaciers/ggk00357 ID. Gilbert, G.K. 357 Alaska Glaciers. Cliff of Columbia Glacier, viewed from west shore of Columbia Bay, southwest of Valdez in the Chugach Mountains. The ice cliff is 300 feet high here. Harriman Expedition, June 27, 1899. Photos ggk00357 and ggk00358 form a panorama. #1:/Alaska Glaciers/ggk00358 ID. Gilbert, G.K. 358 Alaska Glaciers. Cliff of Columbia Glacier, viewed from west shore of Columbia Bay, southwest of Valdez in the Chugach Mountains. The ice cliff is 300 feet high here. Harriman Expedition, June 27, 1899. Photos ggk00357 and ggk00358 form a panorama. #1:/Alaska Glaciers/ggk00359 ID. Gilbert, G.K. 359 Alaska Glaciers. Cliff of Columbia Glacier, which is southwest of Valdez in the Chugach Mountains, viewed from the west shore of Columbia Bay. The ice cliff is 300 feet high here. Harriman Expedition, June 27. 1899. #1:/Alaska Glaciers/ggk00360 ID. Gilbert, G.K. 360 Alaska Glaciers. Cliff of Columbia Glacier, which is southwest of Valdez in the Chugach Mountains, viewed from the west. Harriman Expedition, 1899. #1:/Alaska/ggk00361 ID. Gilbert, G.K. 361 Alaska. Part of the Kenai Peninsula, viewed from Homer. Harriman Expedition, 1899. #1:/Alaska/ggk00362 ID. Gilbert, G.K. 362 Alaska. Part of the Kenai Peninsula, viewed from near Homer. Harriman Expedition, 1899. #1:/Alaska Glaciers/ggk00363 ID. Gilbert, G.K. 363 Alaska Glaciers. Hidden Glacier on Russell Fiord, northeast of Yakutat in the St. Elias Mountains. Harriman Expedition, June 20, 1899. #1:/Alaska/ggk00364 ID. Gilbert, G.K. 364 Alaska. Arm of Russell Fiord reaching toward Hidden Glacier in the St Elias Mountains. Harriman Expedition, June 20, 1899. #1:/Alaska Glaciers/ggk00365 ID. Gilbert, G.K. 365 Alaska Glaciers. Hidden Glacier on Russell Fiord, northeast of Yakutat in the St. Elias Mountains. At left a hanging glacier. Harriman Expedition, June 20, 1899. #1:/Alaska Glaciers/ggk00368 ID. Gilbert, G.K. 368 Alaska Glaciers. Profile of Hidden Glacier on Russell Fiord, northeast of Yakutat in the St. Elias Mountains. Harriman Expedition, June 20, 1899. #1:/Alaska Glaciers/ggk00369 ID. Gilbert, G.K. 369 Alaska Glaciers. Hidden Glacier, which is northeast of Yakutat in the St. Elias Mountains, and margin of moraine. Harriman Expedition, June 20, 1899. #1:/Alaska Glaciers/ggk00370 ID. Gilbert, G.K. 370 Alaska Glaciers. Section of moraine ridge on Hidden Glacier, which is northeast of Yakutat in the St. Elias Mountains. The ridge is composed almost wholly of ice, its melting being retarded by the thin layer of rock waste. Harriman Expedition, June 20, 1899. #1:/Alaska Glaciers/ggk00371 ID. Gilbert, G.K. 371 Alaska Glaciers. Fresh-formed kettle hole on the alluvial plain of Hidden Glacier, which is northeast of Yakutat in the St. Elias Mountains. Harriman Expedition, June 20, 1899. #1:/Alaska Glaciers/ggk00372 ID. Gilbert, G.K. 372 Alaska Glaciers. Incipient kettle hole on the alluvial plain of Hidden Glacier, which is northeast of Yakutat in the St. Elias Mountains. Harriman Expedition, June 20, 1899. #1:/Alaska/ggk00373 ID. Gilbert, G.K. 373 Alaska. Hanging valley on Nunatak Fiord, east of Yakutat Bay in the St. Elias Mountains. Harriman Expedition, 1899. #1:/Alaska/ggk00374 ID. Gilbert, G.K. 374 Alaska. Hanging valley on Nunatak Fiord, east of Yakutat Bay in the St. Elias Mountains. Harriman Expedition, 1899. #1:/Alaska/ggk00375 ID. Gilbert, G.K. 375 Alaska. Spruce forest near Sitka.B.E. Farnow. Harriman Expedition, 1899. #1:/Alaska/ggk00376 ID. Gilbert, G.K. 376 Alaska. Tarn in rock basin on Haenke Island in Disenchantment Bay. Harriman Expedition, 1899. #1:/Alaska/ggk00377 ID. Gilbert, G.K. 377 Alaska. East shore of Yakutat Bay near its head. Harriman Expedition, 1899. #1:/Alaska/ggk00378 ID. Gilbert, G.K. 378 Alaska. Gulls in Yakutat Bay. Harriman Expedition, 1899. #1:/Alaska/ggk00379 ID. Gilbert, G.K. 379 Alaska. Gulls in Yakutat Bay. Harriman Expedition, 1899. #1:/Alaska/ggk00380 ID. Gilbert, G.K. 380 Alaska. East coast of the upper part of Yakutat Bay. Harriman Expedition, 1899. #1:/Alaska/ggk00381 ID. Gilbert, G.K. 381 Alaska. Village of Yakutat Indians near the head of Yakutat Bay. This village is occupied only in the summer, while seals are hunted among the icebergs in Disenchantment Bay. Harriman Expedition, 1899. #1:/Alaska/ggk00382 ID. Gilbert, G.K. 382 Alaska. East shore of Yakutat Bay. Harriman Expedition, 1899. #1:/Alaska/ggk00383 ID. Gilbert, G.K. 383 Alaska. Hinchinbrook Island in Prince William Sound. Harriman Expedition, 1899. #1:/Alaska/ggk00384 ID. Gilbert, G.K. 384 Alaska. Prince William Sound, looking north toward the mountains. Harriman Expedition, 1899. #1:/Alaska/ggk00385 ID. Gilbert, G.K. 385 Alaska. Peninsula north of Port Gravina. Harriman Expedition, 1899. #1:/Alaska/ggk00386 ID. Gilbert, G.K. 386 Alaska. Peninsula north of Port Gravina. Harriman Expedition, 1899. #1:/Alaska/ggk00387 ID. Gilbert, G.K. 387 Alaska. West end of the Kenai Peninsula. Harriman Expedition, 1899. #1:/Alaska/ggk00388 ID. Gilbert, G.K. 388 Alaska. Cloud-capped coast of Kodiak Island. This cloud was seen to be continuously forming on one side of the hill and continuously disappearing on the other. Harriman Expedition, 1899. #1:/Alaska/ggk00389 ID. Gilbert, G.K. 389 Alaska. Terrace of Raspberry Island near Kodiak Island. Harriman Expedition, 1899. #1:/Alaska/ggk00390 ID. Gilbert, G.K. 390 Alaska. Terrace of Spruce Island near Kodiak Island. Harriman Expedition, 1899. #1:/Alaska/ggk00391 ID. Gilbert, G.K. 391 Alaska. Whale, viewed from Kodiak(?). Harriman Expedition, 1899. #1:/Alaska/ggk00392 ID. Gilbert, G.K. 392 Alaska. Kodiak Village. The hill back of the village was sculptured by an ice sheet moving from left to right. The stream gorge is of later formation. Harriman Expedition, 1899. #1:/Alaska/ggk00393 ID. Gilbert, G.K. 393 Alaska. Kodiak Village. The hill back of the village was sculptured by an ice sheet moving from left to right. The stream gorge is of later formation. Harriman Expedition, 1899. #1:/Alaska/ggk00394 ID. Gilbert, G.K. 394 Alaska. Cleavage in slates of the Yakutat Formation on Pogibshi Island near Kodiak. In the more argillaceous layers the cleavage is more nearly vertical than in the more arenaceous. Harriman Expedition, 1899. #1:/Alaska/ggk00395 ID. Gilbert, G.K. 395 Alaska. Cleavage in slates of the Yakutat Formation on Pogibshi Island near Kodiak. In the more argillaceous layers the cleavage is more nearly vertical than in the more arenaceous. Harriman Expedition, 1899. #1:/Alaska/ggk00396 ID. Gilbert, G.K. 396 Alaska. Kodiak Village. Harriman Expedition, 1899. #1:/Alaska/ggk00397 ID. Gilbert, G.K. 397 Alaska. Kodiak Village and Pogibshi Island, viewed from the hill. Harriman Expedition, 1899. #1:/Alaska/ggk00398 ID. Gilbert, G.K. 398 Alaska. Islands off Kodiak. Harriman Expedition, 1899. Photos ggk00398, ggk00399, and ggk00400 form a panorama. #1:/Alaska/ggk00399 ID. Gilbert, G.K. 399 Alaska. Islands off Kodiak. Harriman Expedition, 1899. Photos ggk00398, ggk00399, and ggk00400 form a panorama. #1:/Alaska/ggk00400 ID. Gilbert, G.K. 400 Alaska. Islands off Kodiak. Harriman Expedition, 1899. Photos ggk00398, ggk00399, and ggk00400 form a panorama. #1:/Alaska/ggk00401 ID. Gilbert, G.K. 401 Alaska. Hanging valley on Kodiak Island near Kodiak Village. Between the foreground and the distant mountains is a valley elaborately sculptured by the ice sheet which traversed it from left to right. Harriman Expedition, 1899. #1:/Alaska/ggk00402 ID. Gilbert, G.K. 402 Alaska. Hanging valley on Kodiak Island near Kodiak Village. Between the foreground and the distant mountain is a valley elaborately sculptured by the ice sheet which traversed it from left to right. Harriman Expedition, 1899. #1:/Alaska/ggk00403 ID. Gilbert, G.K. 403 Alaska. Bidarka, or skin boat, in Kodiak Harbor. Harriman Expedition, 1899. #1:/Alaska/ggk00404 ID. Gilbert, G.K. 404 Alaska. Bidarka, or skin boat, in Kodiak Harbor. Harriman Expedition, 1899. #1:/Alaska/ggk00405 ID. Gilbert, G.K. 405 Alaska. Bidarka, or skin boat, in Kodiak Harbor. Harriman Expedition, 1899. #1:/Alaska/ggk00406 ID. Gilbert, G.K. 406 Alaska. Dugout canoe made by Yakutat Indians in Kodiak Harbor. Harriman Expedition, 1899. #1:/Alaska/ggk00407 ID. Gilbert, G.K. 407 Alaska. Southeast(?) coast of the Alaska Peninsula. Harriman Expedition, 1899. #1:/Alaska/ggk00408 ID. Gilbert, G.K. 408 Alaska. Pavlof Volcano on the west side of Pavlof Bay near the southwest end of the Alaska Peninsula. Harriman Expedition, 1899. #1:/Alaska/ggk00409 ID. Gilbert, G.K. 409 Alaska. Pavlof Volcano on the west side of Pavlof Bay near the southwest end of the Alaska Peninsula. The name is given to the broader mass on the left. Harriman Expedition, July 1899. #1:/Alaska/ggk00410 ID. Gilbert, G.K. 410 Alaska. Pavlof Volcano on the west side of Pavlof Bay near the southwest end of the Alaska Peninsula. The name is given to the broader mass on the left. Harriman Expedition, July 1899. #1:/Alaska/ggk00411 ID. Gilbert, G.K. 411 Alaska. Volcanic island near Pavlof Bay. Harriman Expedition, 1899. #1:/Alaska/ggk00412 ID. Gilbert, G.K. 412 Alaska. Coast of the Alaska Peninsula. In the distance on the left are the Aghileen Pinnacles. Harriman Expedition, 1899. #1:/Alaska/ggk00413 ID. Gilbert, G.K. 413 Alaska. Pavlof Volcano on the west side of Pavlof Bay near the southwest end of the Alaska Peninsula. Harriman Expedition, 1899. #1:/Alaska/ggk00414 ID. Gilbert, G.K. 414 Alaska. Shishaldin Volcano on Unimak Island. Harriman Expedition, 1899. #1:/Alaska/ggk00415 ID. Gilbert, G.K. 415 Alaska. Shishaldin Volcano and Pogromni Volcano on Unimak Island. Harriman Expedition, 1899. #1:/Alaska/ggk00416 ID. Gilbert, G.K. 416 Alaska. Valley truncated by erosion of the coast of Unalaska Island. Harriman Expedition, 1899. #1:/Alaska/ggk00417 ID. Gilbert, G.K. 417 Alaska. Coast of Unalaska Island. Harriman Expedition, 1899. #1:/Alaska/ggk00418 ID. Gilbert, G.K. 418 Alaska. Fur seals on St. Paul Island. Harriman Expedition, 1899. #1:/Siberia/ggk00419 ID. Gilbert, G.K. 419 Siberia. Eskimos at Plover Bay. Harriman Expedition, 1899. #1:/Siberia/ggk00420 ID. Gilbert, G.K. 420 Siberia. Eskimos at Plover Bay. Harriman Expedition, 1899. #1:/Siberia/ggk00421 ID. Gilbert, G.K. 421 Siberia. Eskimos at Plover Bay. Harriman Expedition, 1899. #1:/Siberia/ggk00423 ID. Gilbert, G.K. 423 Siberia. Eskimos at Plover Bay. Harriman Expedition, 1899. #1:/Siberia/ggk00424 ID. Gilbert, G.K. 424 Siberia. Eskimo village at Plover Bay. Skin house for summer use on the left. Turf wall of a winter house on the right. Harriman Expedition, 1899. #1:/Siberia/ggk00425 ID. Gilbert, G.K. 425 Siberia. Skin house of Eskimo at Plover Bay. Harriman Expedition, 1899. #1:/Siberia/ggk00426 ID. Gilbert, G.K. 426 Harriman Expedition. Siberia Frame of winter house of Eskimo at Plover Bay. The posts are jaw bones of whales. The filling between them is turf. Harriman Expedition, 1899. #1:/Siberia/ggk00427 ID. Gilbert, G.K. 427 Siberia Frame of winter house of Eskimo at Plover Bay. The posts are jaw bones of whales. The filling between them is turf. Harriman Expedition, 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00428 ID. Gilbert, G.K. 428 East coast of Plover Bay where exposed to the action of ocean waves. Siberia. 1899 #1:/Gilbert1899-Gilbert G.K. Collection/ggk00429 ID. Gilbert, G.K. 429 East coast of Plover Bay showing the part protected by a spit from ocean waves, the end of which appears at the right. Siberia. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00430 ID. Gilbert, G.K. 430 East coast of Plover Bay showing the change in character at the point where the spit leaves the shore, Siberia. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00431 ID. Gilbert, G.K. 431 Coast of Seward Peninsula, northeast of Port Clarence. The mountains are separated from the sea by a broad terrace. York district, Seward Peninsula region, Alaska. 1899. (Panorama with photo no. ggk00432) #1:/Gilbert1899-Gilbert G.K. Collection/ggk00432 ID. Gilbert, G.K. 432 Coast of Seward Peninsula, northeast of Port Clarence. The mountains are separated from the sea by a broad terrace. York district, Seward Peninsula region, Alaska. 1899. (Panorama with photo no. ggk00431) #1:/Gilbert1899-Gilbert G.K. Collection/ggk00433 ID. Gilbert, G.K. 433 Stream valley and tundra near Port Clarence. York district, Seward Peninsula region, Alaska. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00434 ID. Gilbert, G.K. 434 Coast of mainland at Port Clarence. York district, Seward Peninsula region, Alaska. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00435 ID. Gilbert, G.K. 435 Stack off Hall Island, Bering Sea. St. Matthew district, Bering Sea region, Alaska. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00436 ID. Gilbert, G.K. 436 Eskimo traders at side of vessel, Port Clarence. York district, Seward Peninsula region, Alaska. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00437 ID. Gilbert, G.K. 437 Gilbert, G.K. 437 Eskimo traders at side of vessel, Port Clarence. York district, Seward Peninsula region, Alaska. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00438 ID. Gilbert, G.K. 438 Steamer "Dora". Nome district, Seward Peninsula region, Alaska. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00439 ID. Gilbert, G.K. 439 Northeast shore of Kodiak Island. Kodiak district, Southwestern Alaska region, Alaska. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00440 ID. Gilbert, G.K. 440 Four Peak Mountain and Cape Douglas, Kamishak district, Cook Inlet region. Alaska, 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00441 ID. Gilbert, G.K. 441 Mountains back of Kukak Bay, Alaska Peninsula. Katmai district, Southwestern Alaska region, Alaska. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00442 ID. Gilbert, G.K. 442 Alaska Peninsula, Alaska, ca. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00443 ID. Gilbert, G.K. 443 Hanging valley, east shore of Plover Bay. Siberia, ea. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00444 ID. Gilbert, G.K. 444 East coast of Plover Bay where exposed to the action of ocean waves. Siberia. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00445 ID. Gilbert, G.K. 445 East coast of Plover Bay, showing the part protected from ocean waves by a spit, the end of which appears at right. Siberia. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00446 ID. Gilbert, G.K. 446 East coast of Plover Bay. Siberia, ca. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00447 ID. Gilbert, G.K. 447 West coast of Unalaska Bay, Unalaska Island. The nearer hill at the right is a cinder cone. Aleutian Islands, Aleutian region, Alaska. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00448 ID. Gilbert, G.K. 448 Unalaska Bay, Unalaska Island. The nearer settlement is Dutch Harbor; the more distant, Iliuliuk. Aleutian Islands, Aleutian region, Alaska. ca. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00449 ID. Gilbert, G.K. 449 East shore of Unalaska Bay, Unalaska Island, near entrance. Aleutian Islands, Aleutian region, Alaska. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00450 ID. Gilbert, G.K. 450 Head of Unalaska Bay, Unalaska Island. Aleutian Islands, Aleutian region, Alaska. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00451 ID. Gilbert, G.K. 451 Hanging valley, coast of Unalaska Island, Unalaska Bay. Aleutian Islands, Aleutian region, Alaska. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00452 ID. Gilbert, G.K. 452 Ocean view, Aleutian Islands. Aleutian region, Alaska. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00453 ID. Gilbert, G.K. 453 Chert strata, Halibut Cove, Kachemak Bay, Cook Inlet.W.H. Ball in photo. Seldovia district, Cook Inlet region, Alaska. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00454 ID. Gilbert, G.K. 454 Grewingk Glacier, Cook Inlet. Seldovia district, Cook Inlet region, Alaska. July 21, 1899. (Panorama with photo ggk00455) #1:/Gilbert1899-Gilbert G.K. Collection/ggk00455 ID. Gilbert, G.K. 455 Grewingk Glacier, Cook Inlet. Seldovia district, Cook Inlet region, Alaska. July 21, 1899. (Panorama with photo ggk00454) #1:/Gilbert1899-Gilbert G.K. Collection/ggk00456 ID. Gilbert, G.K. 456 Front of Grewingk Glacier, Cook Inlet, at southern edge, showing part of bordering slope formerly covered by the glacier and still unoccupied by forest. In 1894 the edge of the glacier was at the large boulder to which the three marginal arrow points. Seldovia district, Cook Inlet region, Alaska. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00457 ID. Gilbert, G.K. 457 Yakutat village, Yakutat Bay. The village stands on a moraine Yakutat district, Alaska Gulf region, Alaska. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00458 ID. Gilbert, G.K. 458 Fairweather Range, east of Mount Fairweather. Lituya district, Alaska Gulf region, Alaska. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00459 ID. Gilbert, G.K. 459 Mount Fairweather, Fairweather Range. Lituya district, Alaska Gulf region, Alaska. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00460 ID. Gilbert, G.K. 460 Mount Fairweather, Fairweather Range. Lituya district, Alaska Gulf region, Alaska. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00461 ID. Gilbert, G.K. 461 Mount Fairweather, Fairweather Range. At the right Mount Lituya. Lituya district, Alaska Gulf region, Alaska. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00462 ID. Gilbert, G.K. 462 Mount Fairweather, Fairweather Range. At the right Mount Lituya, Lituya district, Alaska Gulf region, Alaska. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00463 ID. Gilbert, G.K. 463 Fairweather Range. The white peak is Mount Grillon; the low ridges near the sea are moraines. Glacier Bay district, Southeastern Alaska region, Alaska. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00464 ID. Gilbert, G.K. 464 La Perouse Peak, Fairweather Range. Most of the glaciers are tributaries of La Perouse Glacier. Glacier Bay district, Southeastern Alaska region, Alaska. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00465 ID. Gilbert, G.K. 465 Mount Fairweather (left) and Mount Crillon (right), Fairweather Range. Lituya district, Alaska Gulf region, Alaska. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00466 ID. Gilbert, G.K. 466 Mount Crillon, Fairweather Range. Glacier Bay district, Southeastern Alaska region, Alaska. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00467 ID. Gilbert, G.K. 467 La Perouse Glacier, Fairweather Range. Glacier Bay district, Southeastern Alaska region, Alaska. July 23, 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00468 ID. Gilbert, G.K. 468 Fairweather Range. The highest point is La Perouse Peak. Glacier Bay district, Southeastern Alaska region, Alaska. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00469 ID. Gilbert, G.K. 469 Gastineau Channel from hill in Juneau. Juneau district, Southeastern Alaska region, Alaska. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00470 ID. Gilbert, G.K. 470 Delta of Gold Creek. Beyond Gastineau Channel is Douglas Island. The island is bordered by a rude terrace at the level of its principal valleys. Juneau district, Southeastern Alaska region, Alaska. 1899. (Panorama with photo ggk00471). #1:/Gilbert1899-Gilbert G.K. Collection/ggk00471 ID. Gilbert, G.K. 471 Delta of Gold Creek. Beyond Gastineau Channel is Douglas Island. The island is bordered by a rude terrace at the level of its principal valleys. Juneau district, Southeastern Alaska region, Alaska. 1899. (Panorama with photo ggk00470). #1:/Gilbert1899-Gilbert G.K. Collection/ggk00472 ID. Gilbert, G.K. 472 Delta of Gold Creek. In the foreground an oxbow lake. Juneau district, Southeastern Alaska region, Alaska. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00473 ID. Gilbert, G.K. 473 Juneau. Juneau district, Southeastern Alaska region, Alaska. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00474 ID. Gilbert, G.K. 474 Juneau. Juneau district, Southeastern Alaska region, Alaska. 1899. (Panorama with photo ggk00475) #1:/Gilbert1899-Gilbert G.K. Collection/ggk00475 ID. Gilbert, G.K. 475 Gastineau Channel and Juneau from near Douglas. Juneau district, Southeastern Alaska region, Alaska. 1899. (Panorama with photo ggk00474). #1:/Gilbert1899-Gilbert G.K. Collection/ggk00476 ID. Gilbert, G.K. 476 Douglas, Douglas Island. Above the town is a narrow terrace marking the upper limit of Pleistocene marine clays. Juneau district, Southeastern Alaska region, Alaska, 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00477 ID. Gilbert, G.K. 477 Douglas, Douglas Island. Above the town is a narrow terrace marking the upper limit of Pleistocene marine clays. Juneau district, Southeastern Alaska region, Alaska. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00478 ID. Gilbert, G.K. 478 Skagway harbor. Skagway district, Southeastern Alaska region, Alaska. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00479 ID. Gilbert, G.K. 479 Skagway harbor. Skagway district, Southeastern Alaska region, Alaska. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00480 ID. Gilbert, G.K. 480 Cascades of Columbia River; general view. Hood River County, Oregon. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00481 ID. Gilbert, G.K. 481 Cascades of Columbia River. The islands in the rapids are boulders brought to their present position by landslides. Hood River County, Oregon. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00482 ID. Gilbert, G.K. 482 Cascades of the Columbia River. The hill in the foreground is a boulder brought to its present position by a landslide. Hood River County, Oregon. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00483 ID. Gilbert, G.K. 483 Pyramid and agave plants. Mexico, n.d. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00484 ID. Gilbert, G.K. 484 Cliff of bedded lavas and tuff, south of Columbia River, near Cascades. Hood River County, Oregon, ca. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00485 ID. Gilbert, G.K. 485 South slope of valley of Columbia River near Cascades, looking east. The hills of foreground and middle ground are slidden masses from the cliff at the right, and are probably still moving slowly down the slope. Hood River County, Oregon, ca. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00486 ID. Gilbert, G.K. 486 (General Collection 2601). South slope of valley of Columbia River near Cascades, looking east. The hills of foreground and middle ground are slidden masses from the cliff at the right, and are probably still moving slowly down the slope. Hood River County, Oregon, ca. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00487 ID. Gilbert, G.K. 487 Landslide scenery near Cascades. The ground is slowly moving down the slope, and the attitudes of the trees are caused by this motion. Hood River County, Oregon, ca. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00488 ID. Gilbert, G.K. 488 Landslide scenery near Cascades. The ground is slowly moving down the slope, and the attitudes of the trees are caused by this motion. The movement disturbs the railroad so that reconstruction of cuts and embankments is frequently necessary. Hood River County, Oregon, ca. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00489 ID. Gilbert, G.K. 489 Trees disturbed by sliding of the land near Cascades. Hood River County, Oregon. ca. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00490 ID. Gilbert, G.K. 490 Trees disturbed by sliding of the land near Cascades. Hood River County, Oregon, ca. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00491 ID. Gilbert, G.K. 491 Contorted clay at Cascades. The yielding of this clay is connected with landslides of the vicinity. Hood River County, Oregon. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00492 ID. Gilbert, G.K. 492 Contorted clay at Cascades. The yielding of this clay is connected with landslides of the vicinity.W.G. Brown in photo. Hood River County, Oregon. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00493 ID. Gilbert, G.K. 493 Spruce stumps standing in the Columbia River above the Cascades. Hood River County, Oregon. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00494 ID. Gilbert, G.K. 494 Forest trees near Beaverton. Washington County, Oregon. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00495 ID. Gilbert, G.K. 495 Forest near Beaverton. Washington County, Oregon. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00496 ID. Gilbert, G.K. 496 Forest near Cape Disappointment. Pacific County, Washington. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00497 ID. Gilbert, G.K. 497 Forest near Cape Disappointment. Pacific County, Washington. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00498 ID. Gilbert, G.K. 498 In Ocean Park. Pacific County, Washington. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00499 ID. Gilbert, G.K. 499 Down the Columbia River from point in Washington opposite Grant, Oregon. Klickitat County, Washington. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00500 ID. Gilbert, G.K. 500 Down the Columbia River from point in Washington opposite Grant, Oregon. Klickitat County, Washington. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00501 ID. Gilbert, G.K. 501 Palisades of the Columbia. The view shows the north shore of the river a few miles above The Dalles. Klickitat County, Washington. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00502 ID. Gilbert, G.K. 502 (General Collection 201). Columnar structure, Palisades of the Columbia. Klickitat County, Washington. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00503 ID. Gilbert, G.K. 503 Sand dunes, Biggs, Oregon. The strong winds of this district are controlled by the canyon walls so as to blow either upstream or downstream. The upstream winds (from left in the view) are the dominant winds, and the dunes are of the type given by a wind of constant direction. Sherman County, Oregon. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00504 ID. Gilbert, G.K. 504 (General Collection 905). Sand dunes, Biggs, Oregon. The strong winds of this district are controlled by the canyon walls so as to blow either upstream or downstream. The upstream winds (from the left in the view) are the dominant winds, and the dunes are of the type given by a wind of constant direction. Sherman County, Oregon. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00505 ID. Gilbert, G.K. 505 (General Collection 904). Sand dunes, Biggs, Oregon. Sherman County, Oregon. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00506 ID. Gilbert, G.K. 506 Sand dunes, Biggs, Oregon. Sherman County, Oregon. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00507 ID. Gilbert, G.K. 507 Sand dunes, Biggs, Oregon. Sherman County, Oregon. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00508 ID. Gilbert, G.K. 508 Sand dunes, Biggs, Oregon. Sherman County, Oregon, 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00509 ID. Gilbert, G.K. 509 Sand dunes, Biggs, Oregon. Sherman County, Oregon. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00510 ID. Gilbert, G.K. 510 The last house in Biggs. The town was abandoned because overwhelmed by sand dunes; this house was being torn down when the photograph was taken. Sherman County, Oregon. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00511 ID. Gilbert, G.K. 511 Arrangement of fences to guide drifting sand away from railroad, Columbia Canyon, near Grant. Sherman County, Oregon. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00512 ID. Gilbert, G.K. 512 Surface of sandy clay undergoing erosion by the wind near Grant. Sherman County, Oregon. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00513 ID. Gilbert, G.K. 513 Wind ripples on side of sand dune, Biggs. Sherman County, Oregon. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00514 ID. Gilbert, G.K. 514 Wind ripples on side of sand dune, Biggs. Sherman County, Oregon. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00515 ID. Gilbert, G.K. 515 Wind ripples on side of sand dune, Biggs. Sherman County, Oregon. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00516 ID. Gilbert, G.K. 516 Ripple marks near Ilwaco. The view represents a portion of the estuary of the Columbia River at low tide. Pacific County, Washington. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00517 ID. Gilbert, G.K. 517 Strand of Pacific Ocean at Ocean Park. Pacific County, Washington. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00518 ID. Gilbert, G.K. 518 Ocean beach at Ocean Park. The drifting of sand is retarded by the growth of ferns. On the landward side of the fern-covered ridge is a young forest, the upper surface of which slopes toward the ocean. Pacific County, Washington. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00519 ID. Gilbert, G.K. 519 Fern-covered beach ridge at Ocean Park. Pacific County, Washington. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00520 ID. Gilbert, G.K. 520 Delta structure in gravel terrace, Umatilla. Umatilla County, Oregon. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00521 ID. Gilbert, G.K. 521 Gravel terrace, Umatilla. Umatilla County, Oregon. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00522 ID. Gilbert, G.K. 522 Gravel terrace, Umatilla. Umatilla County, Oregon. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00524 ID. Gilbert, G.K. 524 Oblique bedding in gravel between Portland and Rocky Butte. Multnoman County, Oregon. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00525 ID. Gilbert, G.K. 525 Rocky Butte near Portland. Multnoman County, Oregon. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00526 ID. Gilbert, G.K. 526 Conchoidal structure in lava, near Cascades. Hood River County, Oregon. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00527 ID. Gilbert, G.K. 527 Conchoidal structure in lava, near Cascades. Hood River County, Oregon. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00528 ID. Gilbert, G.K. 528 Bed of Umatilla River near its mouth. The channel is here through basalt irregularly jointed, and is remarkable for its nearly flat floor in association with nearly vertical sides. Umatilla County, Oregon, ca. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00529 ID. Gilbert, G.K. 529 Bed of Umatilla River near its mouth. Umatilla County, Oregon, ca. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00530 ID. Gilbert, G.K. 530 Bed of Umatilla River near its mouth. Umatilla County, Oregon, ca. 1899. #1:/Gilbert1899-Gilbert G.K. Collection/ggk00531 ID. Gilbert, G.K. 531 An aggrading stream seen from the Canadian Pacific Railroad in British Columbia. Canada. ca. 1899. #1:/Gilbert1901-Gilbert G.K. Collection/ggk00534 ID. Gilbert, G.K. 534 View in valley of Fall Creek. Utah. ca. 1901. #1:/Gilbert1902-Gilbert G.K. Collection/ggk00601 ID. Gilbert, G.K. 601 This scourway is a few miles south of Syracuse, and connects the valleys of Butternut and Onondaga Creeks. It is traversed by the D.L.& W. Railway. Onondaga County, New York. ca. 1902. #1:/Gilbert1902-Gilbert G.K. Collection/ggk00602 ID. Gilbert, G.K. 602 Plesitocene scourway near Syracuse. Onondaga County, New York. ca. 1902. #1:/Gilbert1902-Gilbert G.K. Collection/ggk00603 ID. Gilbert, G.K. 603 Pleistocene scourway near Syracuse. Onondaga County, New York. ca. 1902. #1:/Gilbert1902-Gilbert G.K. Collection/ggk00604 ID. Gilbert, G.K. 604 Scourway connecting glacial lakes. This valley lies south of Jamesville, and crosses the upland between Onondaga and Butternut Creeks, Onondaga County, New York. ca. 1902. #1:/Gilbert1902-Gilbert G.K. Collection/ggk00606 ID. Gilbert, G.K. 606 Drumlin a few miles west of Jamesville. The drumlin is seen from the west. Onondago County, New York. ca. 1902. (Panorama with photo no. 607) #1:/Gilbert1902-Gilbert G.K. Collection/ggk00607 ID. Gilbert, G.K. 607 Drumlin a few miles west of Jamesville. The drumlin is seen from the west. Onondago County, New York. ca. 1902. (Panorama with photo no. 606) #1:/Gilbert1902-Gilbert G.K. Collection/ggk00608 ID. Gilbert, G.K. 608 Pleistocene scourway near Syracuse. Onondaga County, New York. ca. 1902. #1:/Gilbert1902-Gilbert G.K. Collection/ggk00609 ID. Gilbert, G.K. 609 Pleistocene scourway near Syracuse. The hill above the wall of the old channel is a remnant of drumlin, a portion at the left having been removed in connection with the making of the scourway. Onondaga County, New York. ca. 1902. #1:/New York/ggk00623 ID. Gilbert, G.K. 623 New York. Postglacial anticline in limestone near Split Rock, west of Syracuse. 1902. #1:/New York/ggk00624 ID. Gilbert, G.K. 624 New York. Postglacial anticline in limestone near Split Rock, west of Syracuse. 1902. #1:/New York/ggk00627 ID. Gilbert, G.K. 627 New York. Pleistocene scourway between Marcellus and South Onondaga. 1902. #1:/New York/ggk00630 ID. Gilbert, G.K. 630 New York. Pleistocene scourway between Marcellus and South Onondaga. 1902. #1:/New York/ggk00631 ID. Gilbert, G.K. 631 New York. Pleistocene scourway between Marcellus and South Onondaga. 1902. #1:/New York/ggk00632 ID. Gilbert, G.K. 632 New York. Pleistocene scourway between Marcellus and South Onondaga. 1902. #1:/Gilbert1902-Gilbert G.K. Collection/ggk00642 ID. Gilbert, G.K. 642 Limestone sill at head of The Gulf, a Pleistocene scourway running southeastward from Shepherd's Settlement. The intake of the channel is marked by a broad area of bare limestone. Onondaga County, New York. 1902. #1:/New York/ggk00644 ID. Gilbert, G.K. 644 New York. Up The Gulf, a Pleistocene scourway running southeastward from Shepherd's Settlement, from the lower of two roads crossing it. 1902. #1:/New York/ggk00646 ID. Gilbert, G.K. 646 New York. Down The Gulf, a Pleistocene scourway running southeast from Shepherd's Settlement, to its mouth which is south of the town of Marcellus. 1902. #1:/New York/ggk00648 ID. Gilbert, G.K. 648 New York. Kame moraine in Ninemile Valley, which is 1.5 miles south of Marcellus, looking south. 1902. #1:/New York/ggk00659 ID. Gilbert, G.K. 659 New York. Eastward across a Pleistocene scourway 1 mile east of Palmyra. On the south wall of the channel are drumlins with truncated ends. 1902. #1:/New York/ggk00662 ID. Gilbert, G.K. 662 New York. Southeastward across a Pleistocene scourway to East Palmyra. Beyond the town is a truncated drumlin. 1902. #1:/New York/ggk00671 ID. Gilbert, G.K. 671 New York. Drumlin near Newark. 1902. #1:/New York/ggk00672 ID. Gilbert, G.K. 672 New York. Drumlin 4 miles north of Newark, looking west. 1902. #1:/New York/ggk00673 ID. Gilbert, G.K. 673 New York. Pleistocene scourway near Palmyra. 1902. #1:/New York/ggk00674 ID. Gilbert, G.K. 674 New York. Pleistocene scourway, locality doubtful, but probably near Palmyra. 1902. #1:/New York/ggk00676 ID. Gilbert, G.K. 676 New York. Pleistocene scourway, locality doubtful, but probably near Palmyra. 1902. #1:/New York/ggk00678 ID. Gilbert, G.K. 678 New York. Pleistocene scourway, locality doubtful, but probably near Palmyra. 1902. #1:/New York/ggk00681 ID. Gilbert, G.K. 681 New York. Drumlin in a southern suburb of Newark, looking west. 1902. #1:/New York/ggk00682 ID. Gilbert, G.K. 682 New York. North end of a drumlin in the south end of Newark, looking east. 1902. #1:/New York/ggk00683 ID. Gilbert, G.K. 683 New York. North end of a drumlin 1 mile south of Newark, looking south. 1902. #1:/New York/ggk00684 ID. Gilbert, G.K. 684 New York. North end of a drumlin 1 mile south of Newark, looking south. 1902. #1:/New York/ggk00685 ID. Gilbert, G.K. 685 New York. Two drumlins south of Newark, looking southwest. 1902. #1:/New York/ggk00686 ID. Gilbert, G.K. 686 New York. Two drumlins south of Newark, looking southwest. 1902. #1:/New York/ggk00687 ID. Gilbert, G.K. 687 New York. Drumlin midway between Newark and Clifton, looking southwest. 1902. #1:/New York/ggk00688 ID. Gilbert, G.K. 688 New York. Crest of a drumlin near Newark. 1902. #1:/New York/ggk00689 ID. Gilbert, G.K. 689 New York. Boulders in the bed of a Pleistocene scourway near Palmyra. The north wall of the channel is on the right. 1902. #1:/New York/ggk00691 ID. Gilbert, G.K. 691 New York. Pleistocene scourway 2 miles west of Palmyra. The scourway is margined by three truncated drumlins. 1902. #1:/New York/ggk00692 ID. Gilbert, G.K. 692 New York. "Flat Rocks". In the region between Cherubusco and West Chazy are tracts from which all drift has been swept, leaving the surface of Potsdam Sandstone bare. Only a small amount of soil has been formed, and vegetation is scarce. 1902. #1:/New York/ggk00693 ID. Gilbert, G.K. 693 New York. Boulder hills a few miles northwest of West Chazy. Top of ridge, looking north. 1902. #1:/New York/ggk00694 ID. Gilbert, G.K. 694 New York. Boulder hills a few miles northwest of West Chazy. Top of ridge, looking north. 1902. #1:/Meteor Crater, Arizona/ggk00703 ID. Gilbert, G.K. 703 Meteor Crater, Arizona. Northward along the west rim, the crater on the right. 1891. #1:/Meteor Crater, Arizona/ggk00708 ID. Gilbert, G.K. 708 Meteor Crater, Arizona. Inside of the rim, looking west. 1891. #1:/Meteor Crater, Arizona/ggk00712 ID. Gilbert, G.K. 712 Meteor Crater, Arizona. Blocks of limestone on the outer slope, looking north. 1891. #1:/Meteor Crater, Arizona/ggk00713 ID. Gilbert, G.K. 713 Meteor Crater, Arizona. Inner slope, looking northwest. 1891. #1:/Meteor Crater, Arizona/ggk00719 ID. Gilbert, G.K. 719 Meteor Crater, Arizona. Inside the crater. A fan of coarse debris from the wall shows water channels between double ridges of boulders. Mr. Tinker stands in one of these. 1891. #1:/Meteor Crater, Arizona/ggk00720 ID. Gilbert, G.K. 720 Meteor Crater, Arizona. Inside the crater. In the foreground, an alluvial fan with rows of boulders bordering channels. 1891. #1:/Meteor Crater, Arizona/ggk00721 ID. Gilbert, G.K. 721 Meteor Crater, Arizona. Shear zone near the face of the rim. 1891. #1:/Meteor Crater, Arizona/ggk00722 ID. Gilbert, G.K. 722 Meteor Crater, Arizona. Shear zone near the face of the rim. 1891. #1:/Meteor Crater, Arizona/ggk00723 ID. Gilbert, G.K. 723 Meteor Crater, Arizona. Shear zone near the face of the rim. 1891. #1:/Meteor Crater, Arizona/ggk00725 ID. Gilbert, G.K. 725 Meteor Crater, Arizona. North part of the crater, viewed from the west. 1891. #1:/Meteor Crater, Arizona/ggk00730 ID. Gilbert, G.K. 730 Meteor Crater, Arizona. West part of the crater, viewed from the north. 1891. #1:/Meteor Crater, Arizona/ggk00732 ID. Gilbert, G.K. 732 Meteor Crater, Arizona. East part of the crater, viewed from the north. 1891. #1:/Meteor Crater, Arizona/ggk00734 ID. Gilbert, G.K. 734 Meteor Crater, Arizona. West part of the crater, viewed from the north. 1891. Photos ggk00734 and ggk00735 form a panorama. #1:/Meteor Crater, Arizona/ggk00735 ID. Gilbert, G.K. 735 Meteor Crater, Arizona. West part of the crater, viewed from the north. 1891. Photos ggk00734 and ggk00735 form a panorama. #1:/Meteor Crater, Arizona/ggk00737 ID. Gilbert, G.K. 737 Meteor Crater, Arizona. Crater, viewed from the south. 1891. #1:/Meteor Crater, Arizona/ggk00739 ID. Gilbert, G.K. 739 Meteor Crater, Arizona. Crater, viewed from the south. 1891. #1:/Meteor Crater, Arizona/ggk00741 ID. Gilbert, G.K. 741 Meteor Crater, Arizona. West side of the crater, showing limestone blocks. 1891. #1:/Meteor Crater, Arizona/ggk00742 ID. Gilbert, G.K. 742 Meteor Crater, Arizona. Northward along the crest of the rim. Photos ggk00742 and ggk00743 form a panorama. #1:/Meteor Crater, Arizona/ggk00743 ID. Gilbert, G.K. 743 Meteor Crater, Arizona. Northward along the crest of the rim. Photos ggk00742 and ggk00743 form a panorama. #1:/Meteor Crater, Arizona/ggk00744 ID. Gilbert, G.K. 744 Meteor Crater, Arizona. Limestone fragment, illustrating type of weathering. 1891. #1:/Gilbert1891-Gilbert G.K. Collection/ggk00752 ID. Gilbert, G.K. 752 Sunset Knoll and mesa south of Canyon Diablo. Coconino County, Arizona. 1891. #1:/Meteor Crater, Arizona/ggk00754 ID. Gilbert, G.K. 754 Meteor Crater, Arizona. Limestone block ejected from the crater. 1891. #1:/Meteor Crater, Arizona/ggk00756 ID. Gilbert, G.K. 756 Meteor Crater, Arizona. Moraine-like hills on the south side. 1891. #1:/Meteor Crater, Arizona/ggk00758 ID. Gilbert, G.K. 758 Meteor Crater, Arizona. Moraine-like hills on the southern slope. 1891. #1:/Meteor Crater, Arizona/ggk00759 ID. Gilbert, G.K. 759 Meteor Crater, Arizona. Block of limestone 10 feet high, resting on the outer slope of the crater. 1891. #1:/Meteor Crater, Arizona/ggk00761 ID. Gilbert, G.K. 761 Meteor Crater, Arizona. Low, moraine-like hills near the crater. 1891. Photos ggk00761 and ggk00762 form a panorama. #1:/Meteor Crater, Arizona/ggk00762 ID. Gilbert, G.K. 762 Meteor Crater, Arizona. Low, moraine-like hills near the crater. 1891. Photos ggk00761 and ggk00762 form a panorama. #1:/Meteor Crater, Arizona/ggk00763 ID. Gilbert, G.K. 763 Meteor Crater, Arizona. Across the crater, viewed from the south. 1891. #1:/Meteor Crater, Arizona/ggk00765 ID. Gilbert, G.K. 765 Meteor Crater, Arizona. Southeast corner of the rim. 1891. #1:/Meteor Crater, Arizona/ggk00767 ID. Gilbert, G.K. 767 Meteor Crater, Arizona. Interior of the rim. 1891. #1:/Meteor Crater, Arizona/ggk00768 ID. Gilbert, G.K. 768 Meteor Crater, Arizona. Limestone block on the crest of the east side of the rim. 1891. #1:/Meteor Crater, Arizona/ggk00770 ID. Gilbert, G.K. 770 Meteor Crater, Arizona. Crater, viewed from the northeast. 1891. #1:/Meteor Crater, Arizona/ggk00775 ID. Gilbert, G.K. 775 Meteor Crater, Arizona. Inner slope. 1891. #1:/Meteor Crater, Arizona/ggk00776 ID. Gilbert, G.K. 776 Meteor Crater, Arizona. Boulders on the outer slope. 1891. #1:/Meteor Crater, Arizona/ggk00777 ID. Gilbert, G.K. 777 Meteor Crater, Arizona. Moraine-like hills on the outer slope. 1891. #1:/Meteor Crater, Arizona/ggk00778 ID. Gilbert, G.K. 778 Meteor Crater, Arizona. 1891. #1:/Meteor Crater, Arizona/ggk00779 ID. Gilbert, G.K. 779 Meteor Crater, Arizona. Southward along the east rim. 1891. #1:/Meteor Crater, Arizona/ggk00780 ID. Gilbert, G.K. 780 Meteor Crater, Arizona. Limestone block on the rim. 1891. #1:/Meteor Crater, Arizona/ggk00781 ID. Gilbert, G.K. 781 Meteor Crater, Arizona. Southward along the east rim. 1891. #1:/Meteor Crater, Arizona/ggk00782 ID. Gilbert, G.K. 782 Meteor Crater, Arizona. Southward along the east rim. 1891. #1:/Meteor Crater, Arizona/ggk00783 ID. Gilbert, G.K. 783 Meteor Crater, Arizona. Limestone block east of the crater. 1891. #1:/Meteor Crater, Arizona/ggk00784 ID. Gilbert, G.K. 784 Meteor Crater, Arizona. Crater, viewed from the rim. 1891. #1:/Gilbert1891-Gilbert G.K. Collection/ggk00785 ID. Gilbert, G.K. 785 Diastrophic crack in limestone, San Francisco Plateau. Marcus Baker in photo. Coconino County, Arizona. 1891. #1:/Gilbert1891-Gilbert G.K. Collection/ggk00786 ID. Gilbert, G.K. 786 Diastrophic crack in limestone, San Francisco Plateau. Marcus Baker in photo. Coconino County, Arizona. 1891. #1:/Gilbert1891-Gilbert G.K. Collection/ggk00787 ID. Gilbert, G.K. 787 Diastrophic crack in limestone, San Francisco Plateau. Marcus Baker in photo. Coconino County, Arizona. 1891. #1:/Gilbert1891-Gilbert G.K. Collection/ggk00793 ID. Gilbert, G.K. 793 A mesa butte, San Francisco Plateau. Basal sandstone of Moenkopi. Coconino County, Arizona. 1891. #1:/Gilbert1891-Gilbert G.K. Collection/ggk00794 ID. Gilbert, G.K. 794 A fault scarp on the San Francisco Plateau. The bluff at the left is composed of Aubrey Limestone, and the same rock underlies the soil in the foreground. The faulting may have taken place either before or after the removal of the soft shale which overlay the limestone. Coconino County, Arizona. 1891. #1:/Gilbert1891-Gilbert G.K. Collection/ggk00795 ID. Gilbert, G.K. 795 A weathered block of calcareous sandstone, San Francisco Plateau, near Colorado Chiquito River. Besides the fretting of the exterior there has been an excavation of the interior, so that the block was a sort of box without a bottom. The climate of the locality is arid. Coconino County, Arizona. 1891. #1:/Gilbert1891-Gilbert G.K. Collection/ggk00796 ID. Gilbert, G.K. 796 Peculiar weathering of a block of calcareous sandstone, San Francisco Plateau, near Colorado Chiquito River. Coconino County, Arizona. 1891. #1:/Gilbert1891-Gilbert G.K. Collection/ggk00797 ID. Gilbert, G.K. 797 Peculiar weathering of a block of calcareous sandstone, San Francisco Plateau, near Colorado Chiquito River. Coconino County, Arizona. 1891. #1:/Gilbert1891-Gilbert G.K. Collection/ggk00798 ID. Gilbert, G.K. 798 Weathered sandstone, San Francisco Plateau, near Colorado Chiquito River. Shows the peculiar fretting of the surface, and the cavernous excavation of the interior. Coconino County, Arizona. 1891. #1:/Gilbert1891-Gilbert G.K. Collection/ggk00801 ID. Gilbert, G.K. 801 Cinder cones and lava streams, San Francisco Plateau. Coconino County, Arizona. 1891. #1:/Gilbert1891-Gilbert G.K. Collection/ggk00802 ID. Gilbert, G.K. 802 Cinder cones and lava streams, San Francisco Plateau. Coconino County, Arizona. 1891. #1:/Gilbert1891-Gilbert G.K. Collection/ggk00803 ID. Gilbert, G.K. 803 Cinder cones and lava streams, San Francisco Plateau. Coconino County, Arizona. 1891. #1:/Gilbert1891-Gilbert G.K. Collection/ggk00805 ID. Gilbert, G.K. 805 Cinder cones, San Francisco Plateau. Coconino County, Arizona. 1891. #1:/Gilbert1891-Gilbert G.K. Collection/ggk00806 ID. Gilbert, G.K. 806 Cinder cones, San Francisco Plateau. In the foreground, a rather fresh lava stream; in the distance, San Francisco Mountain. Coconino County, Arizona. 1891. #1:/Gilbert1891-Gilbert G.K. Collection/ggk00807 ID. Gilbert, G.K. 807 Lava stream, San Francisco Plateau. The plain descends toward the distance, anc the lava stream flowed from a point near and at the left of the camera station. It first descended a comparatively steep slope, and then spread out on the plain. Along its upper course the margins were congealed, while the central part remained liquid, and when eruption ceased the liquid middle portion flowed on, leaving the hardened margins as parallel ridges. Coconino County, Arizona. 1891. #1:/Gilbert1891-Gilbert G.K. Collection/ggk00812 ID. Gilbert, G.K. 812 Cinder cones, San Francisco Plateau. Coconino County, Arizona. 1891. #1:/Gilbert1891-Gilbert G.K. Collection/ggk00814 ID. Gilbert, G.K. 814 Slaggy crater, San Francisco Plateau. This view shows the end of a low oval crater, which appears in profile at the right in photo no. 818. Coconino County, Arizona. 1891. #1:/Gilbert1891-Gilbert G.K. Collection/ggk00818 ID. Gilbert, G.K. 818 Group of craters, San Francisco Plateau. Coconino County, Arizona. 1891. #1:/Gilbert1891-Gilbert G.K. Collection/ggk00820 ID. Gilbert, G.K. 820 Cinder cones, San Francisco Plateau. Coconino County, Arizona. 1891. #1:/Gilbert1891-Gilbert G.K. Collection/ggk00823 ID. Gilbert, G.K. 823 Cinder cone, San Francisco Plateau. Coconino County, Arizona. 1891. #1:/Gilbert1891-Gilbert G.K. Collection/ggk00824 ID. Gilbert, G.K. 824 Cinder cone, San Francisco Plateau. Coconino County, Arizona. 1891. #1:/Gilbert1891-Gilbert G.K. Collection/ggk00825 ID. Gilbert, G.K. 825 Cinder cone, San Francisco Plateau. Coconino County, Arizona. 1891. #1:/Gilbert1891-Gilbert G.K. Collection/ggk00826 ID. Gilbert, G.K. 826 Cinder cone, San Francisco Plateau. Coconino County, Arizona. 1891. #1:/Gilbert1891-Gilbert G.K. Collection/ggk00829 ID. Gilbert, G.K. 829 Cinder cone, San Francisco Plateau. Coconino County, Arizona. 1891. #1:/Gilbert1891-Gilbert G.K. Collection/ggk00832 ID. Gilbert, G.K. 832 General view of Red Mountain, San Francisco Plateau. Red Mountain is a cinder cone partly exposed in section by the erosion of one side. Coconino County, Arizona. 1891. #1:/Gilbert1891-Gilbert G.K. Collection/ggk00836 ID. Gilbert, G.K. 836 Eroded face of Red Mountain, a cinder cone of the San Francisco Plateau. Coconino County, Arizona. 1891. (Panorama with photo no. 837) #1:/Gilbert1891-Gilbert G.K. Collection/ggk00837 ID. Gilbert, G.K. 837 Eroded face of Red Mountain, a cinder cone of the San Francisco Plateau. Coconino County, Arizona. 1891. (Panorama with photo no. 836) #1:/Gilbert1891-Gilbert G.K. Collection/ggk00838 ID. Gilbert, G.K. 838 Details of the sculptured face of Red Mountain, a cinder cone of the San Francisco Plateau. The figure of a man gives the scale. Coconino County, Arizona 1891. #1:/Gilbert1891-Gilbert G.K. Collection/ggk00839 ID. Gilbert, G.K. 839 San Francisco Mountain from the southwest. Coconino County, Arizona. 1891. #1:/Gilbert1891-Gilbert G.K. Collection/ggk00840 ID. Gilbert, G.K. 840 San Francisco Mountain from the southwest. Coconino County, Arizona. 1891. #1:/Gilbert1891-Gilbert G.K. Collection/ggk00841 ID. Gilbert, G.K. 841 Experiment illustrating the formation of craters by impact. A ball of clay, like the one photographed, was thrown against a slab of clay, which was afterward cut in two, so as to exhibit character of the impact crater. ca. 1891. #1:/Gilbert1891-Gilbert G.K. Collection/ggk00842 ID. Gilbert, G.K. 842 Experiments illustrating the formation of craters by impact. Balls of clay the size of the one shown in the picture were thrown against a slab of clay. The difference in result depended on difference in velocity of impact. ca. 1891. #1:/Gilbert1891-Gilbert G.K. Collection/ggk00843 ID. Gilbert, G.K. 843 Experiments illustrating the formation of craters by impact. Three balls of clay like the one pictured were thrown obliquely against a target of clay. ca. 1891. #1:/Gilbert1891-Gilbert G.K. Collection/ggk00844 ID. Gilbert, G.K. 844 Experiments illustrating the formation of craters by impact. ca. 1891. #1:/Gilbert1891-Gilbert G.K. Collection/ggk00845 ID. Gilbert, G.K. 845 Experiment illustrating the formation of craters by impact. Drops of mud were made to fall in a pan of mud, producing shallow craters with central mounds. By making the mud stiffer there were produced the craters without central mounds shown in photo no. 846. ca. 1891. #1:/Gilbert1891-Gilbert G.K. Collection/ggk00846 ID. Gilbert, G.K. 846 Experiment illustrating the formation of craters by impact. Drops of mud were made to fall in a pan of mud, producing shallow craters. By making the mud stiffer than in photo no. 845 there were no central mounds in the craters. ca. 1891. #1:/Gilbert1894-Gulliver F.P. Collection-Gilbert G.K. Collection/ggk00847 ID. Gilbert, G.K. 847 Tepee buttes north of Nepesta. The butte in foreground shows its core, the diameters of which are 7 feet and 9 feet. Pueblo County, Colorado. 1894. Photo by F.P. Gulliver) #1:/Gilbert1894-Gulliver F.P. Collection-Gilbert G.K. Collection/ggk00848 ID. Gilbert, G.K. 848 Tepee buttes near Nepesta. Pueblo County, Colorado. 1894. Photo by F. P Gulliver) #1:/Gilbert1894-Gulliver F.P. Collection-Gilbert G.K. Collection/ggk00849 ID. Gilbert, G.K. 849 Cottonwood trees marking the course of a creek, Great Plains, eastern Colorado. 1894. Photo by F.P. Gulliver) #1:/Gilbert1894-Gulliver F.P. Collection-Gilbert G.K. Collection/ggk00850 ID. Gilbert, G.K. 850 The core of a tepee butte near Nepesta. The heavier limestone beds are 3 feet thick. Pueblo County, Colorado. 1894 . Photo by F.P. Gulliver) #1:/Gilbert1894-Gilbert G.K. Collection/ggk00851 ID. Gilbert, G.K. 851 Step faults near lower course of Aphishapa River. The structure is shown by dislocation of a conspicuous limestone layer embedded in-shale. Otero County, Colorado. 1894. #1:/Gilbert1894-Gilbert G.K. Collection/ggk00852 ID. Gilbert, G.K. 852 Tepee buttes near Nepesta. Pueblo County, Colorado. 1894. #1:/Gilbert1894-Gilbert G.K. Collection/ggk00853 ID. Gilbert, G.K. 853 Structure detail near Aphishapa River. A nearer view of the rock shown in photo no. 851. Associated with the bending of the limestone are step faults. Otero County, Colorado. 1894. #1:/Gilbert1894-Gilbert G.K. Collection/ggk00854 ID. Gilbert, G.K. 854 The Great Plains in eastern Colorado. In the distance are two lakes occupying basins supposed to have been hollowed out by the wind. Colorado. 1894. #1:/Gilbert1894-Gilbert G.K. Collection/ggk00855 ID. Gilbert, G.K. 855 A juniper tree at the lower limit of timber on the Great Plains, eastern Colorado. 1894. #1:/Gilbert1894-Gulliver F.P. Collection-/ggk00856 ID. Gilbert, G.K. 856 Greenhorn Formation near southeast corner of Pueblo quadrangle. The section illustrates rhythmic alternation of limestone and shale. Pueblo County, Colorado. 1894. Photo by F.P. Gulliver) #1:/Gilbert1894-Gulliver F.P. Collection-/ggk00857 ID. Gilbert, G.K. 857 Tepee buttes near Nepesta. Pueblo County, Colorado. 1894. Photo by F.P. Gulliver) #1:/Gilbert1894-Gulliver F.P. Collection-/ggk00858 ID. Gilbert, G.K. 858 Mesa capped by Niobrara Limestone, Arkansas Valley. Eastern Colorado. 1894. #1:/Colorado-Professional Paper 32/ggk00859 ID. Gilbert, G.K. 859 Tepee buttes in Pierre shale north of Nepesta. Photo by F.P. Gulliver. Pueblo County, Colorado. 1894. Plate 38-B in U.S. Geological Survey. Professional paper 32. 1905. #1:/Gilbert1894-Gulliver F.P. Collection-/ggk00860 ID. Gilbert, G.K. 860 Rattlesnake Butte, a mesa capped by Niobrara Limestone. Apishapa quadrangle, Huerfono County, Colorado. 1894. Photo by F.P. Gulliver) Published as figure 5 in U.S. Geological Survey. Folio 186. 1912. #1:/Gilbert1894-Gulliver F.P. Collection-Gilbert G.K. Collection/ggk00861 ID. Gilbert, G.K. 861 Mesa capped by Niobrara Limestone. Apishapa quadrangle, Pueblo County, Colorado. 1894. Photo by F.P. Gulliver) Published as plate 1 in U.S. Geological Survey. Folio 186. 1912. #1:/Gilbert1894-Gulliver F.P. Collection-Gilbert G.K. Collection/ggk00862 ID. Gilbert, G.K. 862 Haystack Butte, a mesa butte capped by the Niobrara Limestone. Apishapa quadrangle, Pueblo County, Colorado. 1894. Photo by F.P. Gulliver) #1:/Gilbert1894-Gulliver F.P. Collection-Gilbert G.K. Collection/ggk00863 ID. Gilbert, G.K. 863 Tepee buttes, Arkansas Valley. Eastern Colorado. 1894. Photo by F.P. Gulliver) #1:/Gilbert1894-Gulliver F.P. Collection-Gilbert G.K. Collection/ggk00864 ID. Gilbert, G.K. 864 Step faults near lower course of Apishapa River The structure is shown by dislocation of a conspicuous limestone layer embedded in the shale. Otero County, Colorado. 1894. #1:/Gilbert1894-Gulliver F.P. Collection-Gilbert G.K. Collection/ggk00865 ID. Gilbert, G.K. 865 Tepee buttes, Arkansas Valley. Eastern Colorado. 1894. Photo by F P. Gulliver) #1:/Gilbert1894-Gulliver F.P. Collection-Gilbert G.K. Collection/ggk00866 ID. Gilbert, G.K. 866 Spanish Peaks from the northeast. Las Animas County, Colorado. 1894. Photo by F.P. Gulliver) #1:/Gilbert1894-Gulliver F.P. Collection-Gilbert G.K. Collection/ggk00867 ID. Gilbert, G.K. 867 A mesa on the Great Plains. Eastern Colorado. 1894. Photo by F.P. Gulliver) #1:/Gilbert1894-Gulliver F.P. Collection-Gilbert G.K. Collection/ggk00868 ID. Gilbert, G.K. 868 Tepee buttes, Arkansas Valley. Eastern Colorado. 1894. Photo by F.P. Gulliver) #1:/Gilbert1894-Gulliver F.P. Collection-Gilbert G.K. Collection/ggk00869 ID. Gilbert, G.K. 869 Water pockets in Dakota Sandstone near Thatcher. Las Animas County, Colorado. 1894. Photo by F.P. Gulliver) #1:/Gilbert1894-Gulliver F.P. Collection-Gilbert G.K. Collection/ggk00870 ID. Gilbert, G.K. 870 Apishapa Canyon. Las Animas County, Colorado. 1894. Photo by F.P. Gulliver) #1:/Gilbert1894-Gilbert G.K. Collection/ggk00871 ID. Gilbert, G.K. 871 An arroyo on the Great Plains. Nepesta quadrangle, Pueblo County, Colorado. 1894. #1:/Gilbert1894-Gilbert G.K. Collection/ggk00872 ID. Gilbert, G.K. 872 Along the edge of a fault scarp. The rock exposed at right and in the distance at left is Dakota Sandstone. The faulting probably took place before the removal of the overlying shales. Apishapa quadrangle, Pueblo County, Colorado. 1894. #1:/Gilbert1894-Gilbert G.K. Collection/ggk00873 ID. Gilbert, G.K. 873 Fault scarp in Dakota Sandstone. Apishapa quadrangle, Pueblo, County, Colorado. 1894. #1:/Niagara Falls/ggk00874 ID. Gilbert, G.K. 874 Niagara Falls, New York and Canada. American Falls, viewed from Prospect Point. The camera was placed as nearly as possible in the position occupied by Captain Basil Hall when he made his camera lucida sketch in 1828. 1895. #1:/Niagara Falls/ggk00875 ID. Gilbert, G.K. 875 Niagara Falls, New York and Canada. American Falls, viewed from Goat Island. The camera was placed as nearly as possible in the position occupied by Captain Basil Hall when he made his camera lucida sketch in 1828. 1895. Plate 6, U.S. Geological Survey Bulletin 306. #1:/Niagara Falls/ggk00876 ID. Gilbert, G.K. 876 Niagara Falls, New York and Canada. American Falls, viewed from Prospect Point. The camera was placed as nearly as possible in the position occupied by Captain Basil Hall when he made his camera lucida sketch in 1828. 1895. #1:/Niagara Falls/ggk00877 ID. Gilbert, G.K. 877 Niagara Falls, New York and Canada. Horseshoe Falls, Goat Island, and the Three Sister Islands, viewed from the Canadian side. 1895. #1:/Niagara Falls/ggk00878 ID. Gilbert, G.K. 878 Niagara Falls, New York and Canada. Horseshoe Falls, viewed from the Canadian side. The camera stood on a temporary scaffolding to bring it as nearly as possible to the position occupied by Captain Basil Hall when he made his camera lucida sketch in 1828. 1895. #1:/Niagara Falls/ggk00879 ID. Gilbert, G.K. 879 Niagara Falls, New York and Canada. Horseshoe Falls, viewed from the Canadian side. 1895. #1:/Niagara Falls/ggk00880 ID. Gilbert, G.K. 880 Niagara Falls, New York and Canada. Horseshoe Falls, viewed from the Canadian side. 1895. #1:/Niagara Falls/ggk00881 ID. Gilbert, G.K. 881 Niagara Falls, New York and Canada. Upper rapids, viewed from the Canadian side. 1895 #1:/Gilbert1895-Gilbert G.K. Collection/ggk00882 ID. Gilbert, G.K. 882 Horseshoe Falls at Niagara Falls from Canadian side. The camera stood on a temporary scaffolding to bring it as nearly as possible in the position occupied by Capt. Basil Hall in making his camera lucida sketch in 1828. Province of Ontario, Canada. 1895. #1:/Niagara Falls/ggk00883 ID. Gilbert, G.K. 883 Niagara Falls, New York and Canada. Horseshoe Falls, viewed from the Canadian side. The camera stood on a temporary scaffolding to bring it as nearly as possible to the position occupied by Captain Basil Hall when he made his camera lucida sketch in 1828. 1895. Plate 4, U.S. Geological Survey Bulletin 306. #1:/Niagara Falls/ggk00884 ID. Gilbert, G.K. 884 Niagara Falls, New York and Canada. Horseshoe Falls, viewed from the Canadian side. The camera stood on a temporary scaffolding to bring it as nearly as possible to the position occupied by Captain Basil Hall when he made his camera lucida sketch in 1828. 1895. #1:/New York/ggk00885 ID. Gilbert, G.K. 885 New York. Ancient bank and channel floor of the Niagara River made before the erosion of the gorge at this point, about 1 mile north of the American Falls on the New York side. 1895. #1:/Gilbert1895-Gilbert G.K. Collection/ggk00886 ID. Gilbert, G.K. 886 Lower end of the Niagara Gorge, looking north from the Canadian side. Province of Ontario, Canada. 1895. #1:/Gilbert1895-Gilbert G.K. Collection/ggk00887 ID. Gilbert, G.K. 887 Lower end of the Niagara Gorge, looking north from the Canadian side. Province of Ontario, Canada. 1895. #1:/New York/ggk00888 ID. Gilbert, G.K. 888 New York. Looking eastward from Queenston Heights, Canada. The Niagara River, in the foreground, is spanned by the ruins of an old suspension bridge. The piers of this bridge stand on the quartzose sandrock of the Medina Formation. On the slope below is the newly prepared grade of the Gorge Railroad. In the distance on the left is Lewiston; on the right, the Niagara escarpment. 1895. #1:/New York/ggk00889 ID. Gilbert, G.K. 889 New York. Deep pool below the Whirlpool in the Niagara Gorge, viewed from the Canadian side. Beyond the pool is the rapid opposite Foster Flat. 1895. #1:/New York/ggk00890 ID. Gilbert, G.K. 890 New York. Eastward from Queenston Heights, Canada. On the lower part of the slope is the newly prepared grade of the Gorge Railroad. In the distance on the left is Lewiston; on the right, the Niagara escarpment. 1895. #1:/Lake Ontario/ggk00891 ID. Gilbert, G.K. 891 Lake Ontario. Beach ridge and lagoon on the east shore at Griffins Bay, New York. 1895. #1:/Lake Ontario/ggk00892 ID. Gilbert, G.K. 892 Lake Ontario. Cliff on the east shore. The bluff is composed of till. The waves have washed away the finer material, leaving a coarse shingle along with boulders larger than the waves can roll. 1895. #1:/Lake Ontario/ggk00893 ID. Gilbert, G.K. 893 Lake Ontario. Cliff on the east shore. The bluff is composed of till. The waves have washed away the finer material, leaving a coarse shingle along with boulders larger than the waves can roll. 1895. #1:/Lake Ontario/ggk00894 ID. Gilbert, G.K. 894 Lake Ontario. Glaciated limestone laid bare by wave action at Pillar Point, New York. The bluff is composed of till. Besides the parallel striation, the surface exhibits an irregular group of scratches in a different direction. These were supposedly caused by the stranding of an iceberg. Circa 1895. #1:/New York/ggk00895 ID. Gilbert, G.K. 895 New York. Postglacial anticline east of Dunkirk. Circa 1895. #1:/New York/ggk00896 ID. Gilbert, G.K. 896 New York. Postglacial anticline east of Dunkirk. Circa 1895. #1:/New York/ggk00897 ID. Gilbert, G.K. 897 New York. Crushed shale associated with postglacial anticline near Dunkirk. Circa 1895. #1:/New York/ggk00898 ID. Gilbert, G.K. 898 New York. Crushed shale associated with postglacial anticline near Dunkirk. Circa 1895. #1:/New York/ggk00899 ID. Gilbert, G.K. 899 New York. Postglacial anticline near Dunkirk. Circa 1895. #1:/Harpers Ferry National Historic Park/ggk00900 ID. Gilbert, G.K. 900 Harpers Ferry National Historic Park, West Virginia. Cleavage and joints in slate. Mr. Geiger in the photograph. Circa 1895. #1:/Harpers Ferry National Historic Park/ggk00901 ID. Gilbert, G.K. 901 Harpers Ferry National Historic Park, West Virginia. Cleavage and joints in Slate. Circa 1895. #1:/New York/ggk00902 ID. Gilbert, G.K. 902 New York. Joints in shale at Ithaca Falls. Circa 1895. #1:/New York/ggk00903 ID. Gilbert, G.K. 903 New York. Joints in shale at Ithaca Falls. Circa 1895. #1:/New York/ggk00904 ID. Gilbert, G.K. 904 New York. Stone wall east of Watertown built of limestone boulders rounded on a beach of the Iroquois shore line. Circa 1895. #1:/New York/ggk00905 ID. Gilbert, G.K. 905 New York. Terrace and beach of Iroquois shore line near Palermo. Circa 1895. #1:/New York/ggk00906 ID. Gilbert, G.K. 906 New York. Beach and shore cliff of Iroquois shore line near Sodus. 1895. #1:/New York/ggk00907 ID. Gilbert, G.K. 907 New York. Iroquois shore line near Pierpont Manor in Jefferson County. The field represents a shoal near the water's edge. The finer parts of the drift have been carried away and the boulders left. Gilbert Van Ingen in the photograph. Circa 1895. #1:/Gilbert1895-Gilbert G.K. Collection/ggk00908 ID. Gilbert, G.K. 908 Iroquois shore line near Pierpont Manor. The field represents a shoal near the water's edge. The finer parts of the drift have been carried away and the boulders left. Gilbert Van Ingen in photo. Jefferson County, New York. ca. 1895. #1:/Gilbert1895-Gilbert G.K. Collection/ggk00909 ID. Gilbert, G.K. 909 Terrace plain of the Potomac Valley a half mile below Great Falls. This plain is a continuation of the plain of the channel bed above the falls, and is covered at highest water. Montgomery County, Maryland. ca. 1895. #1:/Gilbert1895-Gilbert G.K. Collection/ggk00910 ID. Gilbert, G.K. 910 Terrace plain of the Potomac Valley a half mile below Great Falls. This plain is a continuation of the plain of the channel bed above the falls, and is covered at highest water. Montgomery County, Maryland. ca. 1895. #1:/Gilbert1895-Gilbert G.K. Collection/ggk00911 ID. Gilbert, G.K. 911 Terrace plain of the Potomac Valley a half mile below Great Falls. This plain is a continuation of the plain of the channel bed above the falls, and is covered at highest water. Montgomery County, Maryland. ca. 1895. #1:/New York/ggk00912 ID. Gilbert, G.K. 912 New York. Postglacial anticline near Dunkirk. 1895. #1:/New York/ggk00913 ID. Gilbert, G.K. 913 New York. Gravel beach of Iroquois shore line near Cleveland. 1895. #1:/New York/ggk00914 ID. Gilbert, G.K. 914 New York. Gravel beach of Iroquois shore line near Cleveland. 1895. #1:/Lake Ontario/ggk00915 ID. Gilbert, G.K. 915 Lake Ontario. Glaciated limestone laid bare by wave action at Pillar Point, New York. The bluff is composed of till. Besides the parallel striation, the surface exhibits an irregular group of scratches in a different direction. These were supposedly caused by the stranding of an iceberg. Circa 1895. #1:/Lake Ontario/ggk00916 ID. Gilbert, G.K. 916 Lake Ontario. Glaciated limestone on the lakeshore near Pillar Point, New York. The ordinary parallel striation is traversed by less regular scratches ascribed to icebergs. New York. Circa 1895. #1:/Lake Ontario/ggk00922 ID. Gilbert, G.K. 922 Lake Ontario. Cliff on the east shore. The bluff is composed of till. The waves have washed away the finer material, leaving a coarse shingle along with boulders larger than the waves can roll. 1895. #1:/Lake Ontario/ggk00923 ID. Gilbert, G.K. 923 Lake Ontario. Beach ridge and lagoon on the east shore. 1895. #1:/New York/ggk00924 ID. Gilbert, G.K. 924 New York. Delta on the west shore of Cayuga Lake. 1895. #1:/New York/ggk00925 ID. Gilbert, G.K. 925 New York. Terrace and beach of Iroquois shore line near Palermo. Circa 1895. #1:/New York/ggk00926 ID. Gilbert, G.K. 926 New York. Beach and shore cliff of Iroquois shore line near Sodus. Circa 1895. #1:/New York/ggk00928 ID. Gilbert, G.K. 928 New York. Iroquois shore line near Pierpont Manor in Jefferson County. The field represents a shoal near the water's edge. The finer parts of the drift have been carried away and the boulders left. Gilbert Van Ingen in the photograph. 1895. #1:/New York/ggk00929 ID. Gilbert, G.K. 929 New York. Iroquois shore line near Pierpont Manor in Jefferson County. The field represents a shoal near the water's edge. The finer parts of the drift have been carried away and the boulders left. Gilbert Van Ingen in the photograph. 1895. #1:/New York/ggk00931 ID. Gilbert, G.K. 931 New York. Stone fence east of Watertown, composed of limestone boulders from a beach of the Iroquois shore line. Mr. Wilson in the photograph. Circa 1895. #1:/Lake Ontario/ggk00932 ID. Gilbert, G.K. 932 Lake Ontario. Upper surface of boulder from boulder pavement exposed on the lakeshore near Wilson, New York. Circa 1895. #1:/Lake Ontario/ggk00933 ID. Gilbert, G.K. 933 Lake Ontario. Side of boulder from boulder pavement exposed on the lakeshore near Wilson, New York. Circa 1895. #1:/Lake Ontario/ggk00934 ID. Gilbert, G.K. 934 Lake Ontario. Upper surface of boulder from boulder pavement exposed on the lakeshore near Wilson, New York. Circa 1895. #1:/Lake Ontario/ggk00935 ID. Gilbert, G.K. 935 Lake Ontario. Upper surface of boulder from boulder pavement exposed on the lakeshore near Wilson, New York. Circa 1895. #1:/Lake Ontario/ggk00936 ID. Gilbert, G.K. 936 Lake Ontario. Upper surface of boulder from boulder pavement exposed on lakeshore near Wilson, New York. Circa 1895. #1:/New York/ggk00937 ID. Gilbert, G.K. 937 New York. Gorge in shale in Watkins Glen at Watkins. Circa 1895. Plate 57-C, U.S. Geological Survey Professional Paper 60. #1:/New York/ggk00938 ID. Gilbert, G.K. 938 New York. Group of joints in Watkins Glen at Watkins. Circa 1895. #1:/New York/ggk00939 ID. Gilbert, G.K. 939 New York. Cascade of Fall Creek near Forest Home. Remnant of a pothole in the foreground. 1895. #1:/Gilbert1894-Gulliver F.P. Collection-/ggk00940 ID. Gilbert, G.K. 940 Tepee butte two miles northeast of Boone. In the foreground an ant hill. Pueblo County, Colorado. 1894. Photo by F.P. Gulliver. #1:/Gilbert1894-Gulliver F.P. Collection-/ggk00941 ID. Gilbert, G.K. 941 Summit of tepee butte north of Nepesta, showing the core. Diameters of core 21 by 24 feet. Thickness of limestone layers one to one and a half feet. Pueblo County, Colorado. 1894. Photo by F.P. Gulliver. #1:/Gilbert1894-Gilbert G.K. Collection/ggk00942 ID. Gilbert, G.K. 942 Typical view of the plains. Eastern Colorado. 1894. #1:/Kansas-Professional Paper 32/ggk00943 ID. Gilbert, G.K. 943 Typical view on the high plains of western Kansas, level floor of Ogalalla formation. Circa 1900. Plate 3-A in U.S. Geological Survey. Professional paper 32. 1905, plate 1 in U.S. Geological Survey. Folio 212. 1920. #1:/Gilbert1894-Gilbert G.K. Collection/ggk00944 ID. Gilbert, G.K. 944 Haystack Butte. In the foreground a shallow lake occupying a basin supposed to have been hollowed out by the wind. Apishapa quadrangle, Pueblo County, Colorado. 1894. Published as plate 3 in U.S. Geological Survey. Folio 186. 1913. #1:/Gilbert1894-Gulliver F.P. Collection/ggk00945 ID. Gilbert, G.K. 945 Water pocket in Dakota Sandstone near Thatcher. Las Animas County, Colorado. 1894. Photo by F.P. Gulliver. #1:/Colorado-Professional Paper 32/ggk00946 ID. Gilbert, G.K. 946 Greenhorn limestone in Benton group, near Thatcher, showing alternation of limestone and shale. Photo by F.P. Gulliver. Pueblo County, Colorado. 1894. Plate 38-A in U.S. Geological Survey. Professional paper 32. 1905, plate 12 in U.S. Geological Survey. Folio 186. 1913, plate 24 in U.S. Geological Survey. Folio 36. 1897. #1:/Gilbert1894-Gilbert G.K. Collection/ggk00947 ID. Gilbert, G.K. 947 Fault scarp in Dakota Sandstone. Apishapa quadrangle, Colorado. 1894. Published in U.S. Geological Survey. Folio 186. 1913 #1:/Gilbert1894-Gilbert G.K. Collection/ggk00948 ID. Gilbert, G.K. 948 Modern rain prints, natural size. Collected by W.D. Johnson in Colorado. The rain fell on soft mud, which afterward hardened. Colorado. 1894. #1:/Gilbert1894-Gulliver F.P. Collection/ggk00949 ID. Gilbert, G.K. 949 Ant hill about one foot high. Photographed for comparison with tepee buttes. Eastern Colorado. 1894. Photo by F.P. Gulliver) #1:/New York/ggk00950 ID. Gilbert, G.K. 950 New York. Back-set beds of gravel spit of Iroquois shore line at Lewiston. Circa 1895. #1:/New York/ggk00951 ID. Gilbert, G.K. 951 New York. Back-set beds of gravel spit of Iroquois shore line at Lewiston. Circa 1895. #1:/New York/ggk00952 ID. Gilbert, G.K. 952 New York. Back-set beds of gravel spit of Iroquois shore line at Lewiston. Circa 1895. #1:/New York/ggk00953 ID. Gilbert, G.K. 953 New York. Back-set beds of gravel spit of Iroquois shore line at Lewiston. Circa 1895. #1:/Gilbert1895-Gilbert G.K. Collection/ggk00954 ID. Gilbert, G.K. 954 Section of the great bar of the Iroquois shore line near Hamilton. Province of Ontario, Canada. ca. 1895. #1:/Gilbert1895-Gilbert G.K. Collection/ggk00955 ID. Gilbert, G.K. 955 Section of the great bar of the Iroquois shore line near Hamilton. Province of Ontario, Canada. ca. 1895. #1:/Gilbert1895-Gilbert G.K. Collection/ggk00956 ID. Gilbert, G.K. 956 Marsh inside the great Iroquois bars Dundas Bay. Province of Ontario, Canada. ca. 1895. #1:/Lake Ontario/ggk00957 ID. Gilbert, G.K. 957 Lake Ontario. Lakeshore near Olcott, New York. The broad blocks of rock are approximately in-situ. Circa 1895. #1:/Lake Ontario/ggk00958 ID. Gilbert, G.K. 958 Lake Ontario. Shingle beach near Olcott, New York. The pebbles have been transported for a considerable distance, and their rounding is correspondingly thorough. Circa 1895. #1:/Lake Ontario/ggk00959 ID. Gilbert, G.K. 959 Lake Ontario. Shingle beach near Olcott, New York. The pebbles have been transported for a considerable distance, and their rounding is correspondingly thorough. 1895. #1:/Gilbert1895-Gilbert G.K. Collection/ggk00960 ID. Gilbert, G.K. 960 Anticline in Medina Sandstone on shore of Lake Ontario near Eighteen mile Point. Niagara County, New York. ca. 1895. #1:/Lake Ontario/ggk00961 ID. Gilbert, G.K. 961 Lake Ontario. Anticline in Medina Sandstone on lakeshore near Eighteenmile Point, New York. Circa 1895. Plate 19, U.S. Geological Survey Folio 190. 1913. #1:/Lake Ontario/ggk00962 ID. Gilbert, G.K. 962 Lake Ontario. Anticline in Medina Sandstone on the lakeshore near Eighteenmile Point, New York. Circa 1895. #1:/Lake Ontario/ggk00963 ID. Gilbert, G.K. 963 Lake Ontario. Anticline in Medina Sandstone on the lakeshore near Eighteenmile Point, New York. The ground above shows a low ridge corresponding to the position of the anticline. Circa 1892 #1:/Lake Ontario/ggk00964 ID. Gilbert, G.K. 964 Lake Ontario. Low ridge above an anticline on the lakeshore near Eighteenmile Point, New York. Circa 1895 #1:/Washington, D.C./ggk00965 ID. Gilbert, G.K. 965 Washington, D.C. Miniature delta and alluvial fans at the base of a freshly graded artificial terrace. Circa 1888. #1:/Washington, D.C./ggk00966 ID. Gilbert, G.K. 966 Washington, D.C. Miniature delta and alluvial fans at the base of a freshly graded artificial terrace. Circa 1888. #1:/Washington, D.C./ggk00967 ID. Gilbert, G.K. 967 Washington, D.C. Alluvial fans at the base of a freshly graded artificial terrace. Circa 1888. #1:/Washington, D.C./ggk00968 ID. Gilbert, G.K. 968 Washington, D.C. Delta at the base of a freshly graded artificial terrace. Circa 1888. #1:/Washington, D.C./ggk00969 ID. Gilbert, G.K. 969 Washington, D.C. Delta at the base of a freshly graded terrace. Circa 1888. #1:/New York/ggk00970 ID. Gilbert, G.K. 970 New York. Outcrop of Medina Sandstone bordering race at Lockport. Circa 1895. #1:/New York/ggk00971 ID. Gilbert, G.K. 971 New York. Quarry in Medina Sandstone at Lockport. Circa 1895. #1:/New York/ggk00972 ID. Gilbert, G.K. 972 New York. Coarse alluvium deposited during the torrential scouring of The Gulf at Lockport. Circa 1895. Photos ggk00972 and ggk0972a form a panorama. #1:/New York/ggk00973 ID. Gilbert, G.K. 973 New York. Curved joints in Niagara Limestone near the Erie Railway at Niagara Falls. Circa 1895. #1:/New York/ggk00974 ID. Gilbert, G.K. 974 New York. Curved joints in Niagara Limestone near the Erie Railway at Niagara Falls. Circa 1895. #1:/New York/ggk00975 ID. Gilbert, G.K. 975 New York. Series of curved plates in Lockport Limestone in an old quarry 1.5 miles east of Niagara Falls. Circa 1895. Plate 24, U.S. Geological Survey Folio 190. #1:/Niagara Falls/ggk00976 ID. Gilbert, G.K. 976 Niagara Falls, New York and Canada. Upper rapids, viewed from Goat Island. Circa 1895. #1:/Niagara Falls/ggk00977 ID. Gilbert, G.K. 977 Niagara Falls, New York and Canada. Upper rapids, viewed from one of the Three Sisters Islands. Circa 1895. #1:/New York/ggk00978 ID. Gilbert, G.K. 978 New York. Niagara River, looking down from the brink of the gorge at the mouth of Fish Creek. The depth here is about 90 feet. Circa 1895. #1:/New York/ggk00979 ID. Gilbert, G.K. 979 New York. Niagara River a short distance above the Whirlpool, viewed from the Canadian side. The water here passes over a terrace ledge of quartzose sandstone of the Medina Formation. The upper fourth of the cliff is Niagara Limestone. The ledges a little below mid-height are of the Clinton Formation. Circa 1895. #1:/Niagara Falls/ggk00980 ID. Gilbert, G.K. 980 Niagara Falls, New York and Canada. New carriage and electric railroad bridge, viewed from the American side, showing the character of the water surface and also the maturity of the talus slope, as indicated by forest growth. Circa 1895. #1:/New York/ggk00981 ID. Gilbert, G.K. 981 New York. Course of the Niagara River through the lower plain from the track of the R.W. & 0. Railway where it descends the Niagara escarpment. Queenston on the left. Circa 1895. Photos ggk00981 and ggk00982 form a panorama. #1:/New York/ggk00982 ID. Gilbert, G.K. 982 New York. Course of the Niagara River through the lower plain from the track of the R.W. & 0. Railway where it descends the Niagara escarpment. Queenston on the left. Circa 1895. Photos ggk00981 and ggk00982 form a panorama. #1:/New York/ggk00983 ID. Gilbert, G.K. 983 New York. Eastward along the R.W. & 0. Railway where it descends the Niagara escarpment near Lewiston. Circa 1895. #1:/New York/ggk00984 ID. Gilbert, G.K. 984 New York. Alluvial plain of Eighteenmile Creek in the mouth of the gorge at Lockport. Circa 1895. #1:/New York/ggk00985 ID. Gilbert, G.K. 985 New York. Alluvial plain of Eighteenmile Creek in the mouth of the gorge at Lockport. Circa 1895. #1:/New York/ggk00986 ID. Gilbert, G.K. 986 New York. Eighteenmile Creek in the lower part of the gorge at Lockport. Circa 1895. #1:/New York/ggk00987 ID. Gilbert, G.K. 987 New York. Stream meander of Eighteenmile Creek. On the right a steep bank undercut by the current. On the left a sloping bank which receives additions at flood stage. Circa 1895. #1:/New York/ggk00988 ID. Gilbert, G.K. 988 New York. Inlet Creek above Ithaca. The orchard stands on a low terrace or old alluvial plain. Circa 1895. #1:/Washington, D.C./ggk00989 ID. Gilbert, G.K. 989 Washington, D.C. Potomac River above aqueduct bridge, viewed from the north shore. 1888. #1:/New York/ggk00990 ID. Gilbert, G.K. 990 New York. Estuary of Eighteenmile Creek. The canting of the basin of Lake Ontario has caused the slack water in the lower 2 miles of the creek. Circa 1895. #1:/New York/ggk00991 ID. Gilbert, G.K. 991 New York. Estuary of Eighteenmile Creek. Circa 1895. Photos ggk00991 and ggk0991a form a panorama. #1:/New York/ggk00992 ID. Gilbert, G.K. 992 New York. Estuary of Eighteenmile Creek. Circa 1895. #1:/New York/ggk00993 ID. Gilbert, G.K. 993 New York. Eighteenmile Creek, just above its estuary. Circa 1889. #1:/New York/ggk00994 ID. Gilbert, G.K. 994 New York. Estuary of Twelvemile Creek. Circa 1889. #1:/New York/ggk00995 ID. Gilbert, G.K. 995 New York. Estuary of Twelvemile Creek. Circa 1889. #1:/New York/ggk00996 ID. Gilbert, G.K. 996 New York. Bend in Eighteenmile Creek near Lockport, showing the cutting of the bank on the left and its building out on the right. Circa 1889. #1:/New York/ggk00997 ID. Gilbert, G.K. 997 New York. Quarry in Medina Sandstone(?) at Lockport. Circa 1889. #1:/New York/ggk00998 ID. Gilbert, G.K. 998 New York. Quarry in Medina Sandstone(?) at Lockport. Circa 1889. #1:/New York/ggk00999 ID. Gilbert, G.K. 999 New York. Medina Shale along Eighteenmile Creek. Circa 1889. #1:/New York/ggk01000 ID. Gilbert, G.K. 1000 New York. Angular gravel in till about 5 miles northeast of Lockport. Circa 1889. #1:/New York/ggk01001 ID. Gilbert, G.K. 1001 New York. Beach gravel, partly cemented back-set beds of Iroquois shore line at Lewiston. Circa 1889. Plate 4-A, U.S. Geological Survey Water-Supply Paper 489. #1:/New York/ggk01002 ID. Gilbert, G.K. 1002 New York. Drift ridge northeast of Lockport. Circa 1889. #1:/New York/ggk01003 ID. Gilbert, G.K. 1003 New York. Mud Creek south of Lockport. Circa 1889. #1:/New York/ggk01004 ID. Gilbert, G.K. 1004 New York. Postglacial anticline in Medina Sandstone west of Olcott. Circa 1889. #1:/Lake Ontario/ggk01005 ID. Gilbert, G.K. 1005 Lake Ontario. Lakeshore of near Wilson, New York. Circa 1889. #1:/New York/ggk01006 ID. Gilbert, G.K. 1006 New York. Stream terraces near Wilson. Circa 1889. Photos ggk01006 and ggk1006a form a panorama. #1:/New York/ggk01007 ID. Gilbert, G.K. 1007 New York. Gravel bar in stream channel near Akron. Circa 1889. #1:/New York/ggk01008 ID. Gilbert, G.K. 1008 New York. Stone heap in a field between Iroquois shore line and Lake Ontario. The stony field from which this heap was gathered received its character from the sorting of the drift on a shoal of Lake Iroquois. Circa 1889. #1:/New York/ggk01009 ID. Gilbert, G.K. 1009 New York. Ridge Road in Orleans County. This road follows the crest of the beach ridge of the Iroquois shore line. Circa 1889. #1:/Niagara Falls/ggk01010 ID. Gilbert, G.K. 1010 Niagara Falls, New York and Canada. Horseshoe Falls, viewed from the American side. Circa 1889. #1:/New York/ggk01011 ID. Gilbert, G.K. 1011 New York. Section of talus on a slope of the Niagara Gorge exposed in the bank of Fasia Creek. Circa 1889. #1:/New York/ggk01012 ID. Gilbert, G.K. 1012 New York. Rock section exposed in the east bluff of the northern part of the Niagara Gorge above the New York Central Railroad track. Circa 1889. Plate 16, U.S. Geological Survey Folio 190. #1:/New York/ggk01013 ID. Gilbert, G.K. 1013 New York. Northward in the Niagara Gorge, the end of the gorge appearing in the distance. Circa 1889. #1:/New York/ggk01014 ID. Gilbert, G.K. 1014 New York. Cross bedding in a quarry of Medina Sandstone at Lockport. Circa 1889. #1:/New York/ggk01015 ID. Gilbert, G.K. 1015 New York. Giant ripples in Medina Sandstone at Lewiston. Circa 1889. #1:/New York/ggk01016 ID. Gilbert, G.K. 1016 New York. Giant ripples in Medina Sandstone at Lewiston. Circa 1889. #1:/New York/ggk01017 ID. Gilbert, G.K. 1017 New York. Ripple marks on Niagara Limestone at Gasport. Circa 1889. #1:/Ohio/ggk01018 ID. Gilbert, G.K. 1018 Ohio. Ripple marks on sandstone flagging near Elyria. Circa 1870. #1:/Ohio/ggk01019 ID. Gilbert, G.K. 1019 Ohio. Ripple marks on sandstone flagging near Elyria. Circa 1870. #1:/New York/ggk01020 ID. Gilbert, G.K. 1020 New York. Ripple marks on sandstone in Cuyahoga County. Circa 1870. #1:/Ohio/ggk01021 ID. Gilbert, G.K. 1021 Ohio. Ripple marks on sandstone near Berea. Circa 1870. #1:/Ohio/ggk01022 ID. Gilbert, G.K. 1022 Ohio. Ripple marks on sandstone near Berea. Circa 1870. #1:/Ohio/ggk01023 ID. Gilbert, G.K. 1023 Ohio. Delta of recent formation at the edge of an artificial pool near Berea. Circa 1870. #1:/New York/ggk01024 ID. Gilbert, G.K. 1024 New York. Nodular structure in Medina Shale in the Niagara Gorge. Circa 1889. #1:/New York/ggk01025 ID. Gilbert, G.K. 1025 New York. Local irregularity in Albion Sandstone in the Niagara Gorge. The lenticular sandstone mass rests unconformably on the thinner beds beneath, which suggests channeling and possible marine scour. Circa 1889. Plate 20, U.S. Geological Survey Folio 190. #1:/New York/ggk01026 ID. Gilbert, G.K. 1026 New York. Contorted stratification of sand in a sand pit east of Lockport. Circa 1,889. #1:/New York/ggk01027 ID. Gilbert, G.K. 1027 New York. Limestone dome in Niagara Shale in the Niagara Gorge. Circa 1889. #1:/Lake Ontario/ggk01028 ID. Gilbert, G.K. 1028 Lake Ontario. Boulder pavement on the lakeshore near Wilson, New York. Circa 1889. #1:/Gilbert1899-Gilbert G.K. Collection/ggk01029 ID. Gilbert, G.K. 1029 Lava beds and tuff beds, canyon of Columbia River near Cascade Locks. Hood River County, Oregon. ca. 1899. #1:/Virginia/ggk01717 ID. Gilbert, G.K. 1717 Virginia. Columnar structure in the Blue Ridge Mountains at Stony Man Camp. Circa 1883. #1:/Lake Ontario/ggk01743 ID. Gilbert, G.K. 1743 Lake Ontario. Lakeshore near Olcott, New York. The flat little-worn blocks are approximately in their original position. Circa 1889. #1:/Lake Ontario/ggk01744 ID. Gilbert, G.K. 1744 Lake Ontario. Shingle beach west of Olcott, New York. Circa 1889. #1:/Lake Ontario/ggk01745 ID. Gilbert, G.K. 1745 Lake Ontario. Shingle beach west of Olcott, New York. Circa 1889. #1:/New York/ggk01746 ID. Gilbert, G.K. 1746 New York. Cemented beach gravel, back-set beds of Iroquois beach at Lewiston. Circa 1889. #1:/New York/ggk01747 ID. Gilbert, G.K. 1747 New York. Cemented beach gravel, back-set beds of Iroquois beach at Lewiston. Circa 1889. #1:/New York/ggk01748 ID. Gilbert, G.K. 1748 New York. Back-set beds of Iroquois beach at Lewiston. Circa 1889. #1:/New York/ggk01749 ID. Gilbert, G.K. 1749 New York. Iroquois shore line about 10 miles east of Lewiston. The bluff beyond the barn was a shore cliff, the plain before it having been submerged. Circa 1889. #1:/New York/ggk01750 ID. Gilbert, G.K. 1750 New York. Iroquois plain in Niagara County. Circa 1889. #1:/New York/ggk01751 ID. Gilbert, G.K. 1751 New York. Unconformities in stratified sand east of Lockport. Circa 1889. #1:/Lake Ontario/ggk01752 ID. Gilbert, G.K. 1752 Lake Ontario. Glacial till shore at Fort Niagara, New York. Circa 1889. #1:/New York/ggk01755 ID. Gilbert, G.K. 1755 New York. Angular gravel in glacial till northeast of Lockport. Circa 1889. #1:/New York/ggk01756 ID. Gilbert, G.K. 1756 New York. Solitary kame in Orleans County. Circa 1889. #1:/New York/ggk01757 ID. Gilbert, G.K. 1757 New York. Westward from the R.W. & 0. Railroad where it descends the Niagara escarpment. On the left the escarpment, with Brock's monument; on the right, Lewiston. Circa 1889. #1:/New York/ggk01760 ID. Gilbert, G.K. 1760 New York. Estuary of Twelvemile Creek. Circa 1889. #1:/New York/ggk01761 ID. Gilbert, G.K. 1761 New York. Estuary of Twelvemile Creek. Circa 1889. #1:/New York/ggk01762 ID. Gilbert, G.K. 1762 New York. Estuary of Twelvemile Creek. Circa 1889. #1:/New York/ggk01763 ID. Gilbert, G.K. 1763 New York. Eighteenmile Creek just above its estuary. Circa 1889. #1:/New York/ggk01764 ID. Gilbert, G.K. 1764 New York. Postglacial anticline in Medina Sandstone west of Olcott. Circa 1889. #1:/New York/ggk01765 ID. Gilbert, G.K. 1765 New York. Curved joints in Niagara Limestone near the Erie Railway at Niagara Falls. Circa 1889. #1:/New York/ggk01766 ID. Gilbert, G.K. 1766 New York. Curved joints in Niagara Limestone near the Erie Railway at Niagara Falls. Circa 1889. #1:/New York/ggk01767 ID. Gilbert, G.K. 1767 New York. Joint face of Niagara Limestone exposed in a quarry near Gasport. Circa 1889. #1:/New York/ggk01768 ID. Gilbert, G.K. 1768 New York. Weathered limestone in the Niagara Formation near Gasport. Circa 1899. #1:/New York/ggk01769 ID. Gilbert, G.K. 1769 New York. Exposed Medina Sandstone at Lockport. Circa 1889. #1:/New York/ggk01770 ID. Gilbert, G.K. 1770 New York. Reef structure at the top of the Irondequoit Limestone Member of the Clinton Formation projecting into Rochester Shale Member in the Niagara Gorge. Circa 1889. Plate 23, U.S. Geological Survey Folio 190. #1:/New York/ggk01771 ID. Gilbert, G.K. 1771 New York. Giant ripples in Medina Sandstone at Lockport. Circa 1889. #1:/Gilbert1878-Gilbert G.K. Collection/ggk01772 ID. Gilbert, G.K. 1772 Ripple marks on sandstone flagging, Elyria. Lorain County, Ohio. ca. 1878. #1:/New York/ggk01773 ID. Gilbert, G.K. 1773 New York. Remnant of a giant ripple in Medina Sandstone near the track of the New York Central Railroad in the Niagara Gorge. Circa 1889. #1:/New York/ggk01774 ID. Gilbert, G.K. 1774 New York. Crest between two sedimentary trough structures in Albion Sandstone at Lewiston. Circa 1889. Plate 22, U.S. Geological Survey Folio 190. #1:/New York/ggk01775 ID. Gilbert, G.K. 1775 New York. Crest of giant ripples in Medina Sandstone exposed in a quarry at Lockport. 1898. #1:/New York/ggk01776 ID. Gilbert, G.K. 1776 New York. Crossbedding in Medina Sandstone at Lewistown. 1898. #1:/New York/ggk01777 ID. Gilbert, G.K. 1777 New York. Albion Sandstone in a quarry at Lockport. 1898. Plate 18, U.S. Geological Survey Folio 190. #1:/New York/ggk01778 ID. Gilbert, G.K. 1778 New York. Quarry in Medina Sandstone at Lockport. 1898. #1:/Lake Ontario/ggk01779 ID. Gilbert, G.K. 1779 Lake Ontario. Lakeshore near Wilson, New York, viewed from the end of a pier. Shore drift transported by the waves, from right to left, accumulates against the pier. On the opposite (east) side of the pier the defect of shore drift exposes the till to comparatively rapid erosion. 1898. Photos ggk01799 and ggk1779a form a panorama. #1:/Gilbert, G.K. Collection/ggk01780 ID. Gilbert, G.K. 1780 Glacier Bay National Park and Preserve, Alaska. Head of Lituya Bay. The bay has the form of a letter T, with the cross bar parallel to the main coast. This photograph shows the cross bar and the beginning of the stem, which runs in a narrow passage to the right. The cross bar occupies part of a trough parallel to the coast; the other parts contain glaciers. Copy of a photograph made by the Canadian International Boundary Commission in 1895(?). #1:/Gilbert, G.K. Collection/ggk01781 ID. Gilbert, G.K. 1781 Glacier Bay National Park and Preserve, Alaska. Part of the Fairweather Range, viewed from a foothill, showing the middle course of a glacier of which the lower end appears in the foreground of photo ggk01780. From a photograph made by the Canadian International Boundary Commission in 1895(?). #1:/Gilbert1901-Gilbert G.K. Collection/ggk01782 ID. Gilbert, G.K. 1782 West front of the Wasatch Range, from the City Creek spur. Salt Lake County, Utah. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01783 ID. Gilbert, G.K. 1783 Tertiary conglomerate, City Creek spur, Wasatch Range, Salt Lake County, Utah. 1901 #1:/Gilbert1901-Gilbert G.K. Collection/ggk01784 ID. Gilbert, G.K. 1784 Mountain mahogany, City Creek spur, Wasatch Range, Salt Lake County, Utah. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01785 ID. Gilbert, G.K. 1785 Willard D. Johnson and the Johnson plane table; City Creek spur, Wasatch Range, Salt Lake County, Utah. July 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01786 ID. Gilbert, G.K. 1786 Fault scarp west face of City Creek spur, Wasatch Range, Utah; north of Powder mills. Salt Lake County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01787 ID. Gilbert, G.K. 1787 Fault scarp northwest face of City Creek spur, Wasatch Range, Utah. Salt Lake County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01788 ID. Gilbert, G.K. 1788 Panorama of Bonneville shore line on northwest face of City Creek spur, Wasatch Range, Utah. The bluff at right is the original slope of the spur; the terrace at left is a spit. Salt Lake County. 1901. (Panorama with photo no. 1788a). #1:/Gilbert1901-Gilbert G.K. Collection/ggk01789 ID. Gilbert, G.K. 1789 Fault scarf) southwest face of City Creek spur, Wasatch Range, Utah. The locality is a half mile north of the Warm Springs bath house. The scarp exposes a portion of the shear zone of the fault. (Compare with no. 1790), At top of the scarp is a layer of cemented gravel, probably formed during the Bonneville epoch and at the base of the cliff. The scarp is therefore regarded as post-Bonneville. Salt Lake County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01790 ID. Gilbert, G.K. 1790 Details of fault scarp shown in no. 1789. The smooth surfaces are slickensided. Salt Lake County, Utah. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01791 ID. Gilbert, G.K. 1791 Alluvial plain on the west face of City Creek spur, Wasatch Range, Utah. The fan has been partly removed for the sake of its gravel, with the result that a section is shown parallel to the face of the range. Salt Lake County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01792 ID. Gilbert, G.K. 1792 Southwest front of City Creek spur, Wasatch Range, Utah. The boldness of this front is due to its comparatively recent uplift along a fault plane; but the greater part of the uplifting was pre-glacial. The Bonneville and Provo shore lines are drawn across the face. At top are features of a mature topography developed before the uplift. Salt Lake County. 1901. Published as plate 8-A in U.S. Geological Survey. Professional paper 153, 1928. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01793 ID. Gilbert, G.K. 1793 Section of a fault in valley deposits, northeastern suburb of Salt Lake City, Utah. At left coarse alluvium of the foot slope of the Wasatch Range; at right sandy silt deposited by Pleistocene lake; between the two a belt of disturbed material the shear zone of the fault. Salt Lake County. 1901. (Similar to photo no. 1793a). #1:/Gilbert1901-Gilbert G.K. Collection/ggk01794 ID. Gilbert, G.K. 1794 South wall of canyon of Mill Creek, Wasatch Range, Utah, near its mouth. The steep-dipping stratified rocks strike approximately at right angles to the mountain front, and are separated from the front by a continuous sheet of shear zone, which appears in the photograph above and at the right of the strata. Salt Lake County. 1901. Published as plate 2-A in U.S. Geological Survey. Professional paper 153, 1928. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01795 ID. Gilbert, G.K. 1795 West front of Wasatch Range, Utah, looking northward from near mouth of Kill Creek Canyon. Salt Lake County. 1901. (Panorama with photo no. 1795a). #1:/Gilbert1901-Gilbert G.K. Collection/ggk01796 ID. Gilbert, G.K. 1796 Bonneville shore line on promontory of Wasatch Range, Utah, between Mill and Cottonwood Creeks. Salt Lake County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01797 ID. Gilbert, G.K. 1797 Front of Wasatch Range, Utah, near Big Cottonwood Canyon. The horizontal terrace is the Bonneville shore line. Below it are two fault scarps, the upper appearing at the right, just below the Bonneville terrace, the lower at the edge of the lower terrace. Salt Lake County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01798 ID. Gilbert, G.K. 1798 Face of Wasatch Range, Utah, between Big Cottonwood and Little Cottonwood Canyons; seen from the northwest. Except for minor furrows, due to erosion, this face represents the plane of the fault along which the mountain was uplifted. Salt Lake County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01799 ID. Gilbert, G.K. 1799 Face of Wasatch Range, Utah, near Big Cottonwood Canyon. At the base of the mountain front is a fault scarp; the terrace above it are shore lines of Lake Bonneville. Salt Lake County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01800 ID. Gilbert, G.K. 1800 Fault scarps in alluvium near the base of the Wasatch Range, Utah. 1901. Published as plate 13-B in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01801 ID. Gilbert, G.K. 1801 Fault scarps in alluvium near the base of the Wasatch Range, Utah. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01802 ID. Gilbert, G.K. 1802 Fault scarps near base of Wasatch Range, Utah. The valley of Big Cottonwood Creek crosses the foreground from left to right. The valley of Little Cottonwood Creek appears in the distance. The alluvial plain between the two is separated into two parts by a fault. Salt Lake County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01803 ID. Gilbert, G.K. 1803 West front of Wasatch Range, Utah, north of Big Cottonwood Canyon. Salt Lake County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01804 ID. Gilbert, G.K. 1804 West front of Wasatch Range, Utah, north of Big Cottonwood Canyon, Seen from alluvial terrace just south of the valley of Cottonwood Creek. Salt Lake County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01805 ID. Gilbert, G.K. 1805 Terraces and fault scarp, west base of Wasatch Range, Utah. Cottonwood Creek appears in the foreground, flowing from right to left. The fault scarp runs between the two terrace lines. Salt Lake County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01806 ID. Gilbert, G.K. 1806 Fault scarp near base of Wasatch Range, Utah. The valley of Big Cottonwood Creek crosses the foreground from left to right. The valley of Little Cottonwood Creek appears in the distance. The alluvial plain between the two is separated into two parts by a fault. Salt Lake County. 1901 #1:/Gilbert1901-Gilbert G.K. Collection/ggk01807 ID. Gilbert, G.K. 1807 West front of Wasatch Range, Utah, north of Big Cottonwood Canyon. Near the center of the view is a flat moraine of the Little Cottonwood system, presenting a steep bluff, due to recent faulting. Toward the left are two other fault scarps. Salt Lake County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01808 ID. Gilbert, G.K. 1808 Fault scarp, Little Cottonwood Canyon, Wasatch Range, Utah. Salt Lake County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01809 ID. Gilbert, G.K. 1809 West front of Wasatch Range, Utah, between Big Cottonwood and Little Cottonwood Canyons; looking northeastward from near Little Cottonwood Canyon. Salt Lake County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01810 ID. Gilbert, G.K. 1810 Fault scarp in the northern lateral moraine of Little Cottonwood Canyon, Wasatch Range. Salt Lake County, Utah. 1901. (Compare with photo nos. 1812, 1813, 1818). #1:/Gilbert1901-Gilbert G.K. Collection/ggk01811 ID. Gilbert, G.K. 1811 Fault scarps along west base of Wasatch Range, Utah, between Big Cottonwood and Little Cottonwood Canyons. Salt Lake County. 1901. Published as plate 14-A in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01812 ID. Gilbert, G.K. 1812 Compound fault scarp across north moraine of Little Cottonwood Canyon, Wasatch Range, Utah. The outer part of the moraine, shown at left, is thrown downward, with reference to the part near the canyon, shown at right. Between the two is a narrow block dropped lower than either. Salt Lake County. 1901. (Compare with photo nos. 1810, 1813, 1818). #1:/Gilbert1901-Gilbert G.K. Collection/ggk01813 ID. Gilbert, G.K. 1813 Compound fault scarp across north moraine of Little Cottonwood Canyon, Wasatch Range, Utah. The outer part of the moraine, shown at left, is thrown downward, with reference to the part near the canyon, shown at right. Between the two is a narrow block dropped lower than either. Salt Lake County. 1901. (See photo nos. 1810, 1818). Published as plate 14-B in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01814 ID. Gilbert, G.K. 1814 West face of Wasatch Range, Utah, south of Little Cottonwood Canyon. The approximately plane facets of the mountain front between canyons represent approximately the plane along which the faulting took place. Salt Lake County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01815 ID. Gilbert, G.K. 1815 West face of Wasatch Range, Utah, south of Little Cottonwood Canyon. The approximately plane facets of the mountain front between canyons represent approximately the plane along which the faulting took place, Salt Lake County. 1901. Published as plate 19-A in U.S. Geological Survey. Professional paper 153, 1928. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01816 ID. Gilbert, G.K. 1816 Granite bowlder, moraine of Dry Cottonwood Canyon, Wasatch Range, Salt Lake County, Utah. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01817 ID. Gilbert, G.K. 1817 Little Cottonwood Canyon, Wasatch Range, Utah, from the village of Granite. The lower part of the canyon was occupied by a Pleistocene glacier. The white bluff above which stand two houses is a fault scarp. Salt Lake County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01818 ID. Gilbert, G.K. 1818 Distant view of the north moraine of Little Cottonwood Canyon, Utah. The hill at left is a portion of the moraine faulted downward, and a still lower block lies between it and the main part. Above the moraine terrace at the right the upper limit of the glacier is indicated by the distribution of white granite bowlders. Salt Lake County. 1901. (Compare with 1810, 1812, 1813), #1:/Gilbert1901-Gilbert G.K. Collection/ggk01819 ID. Gilbert, G.K. 1819 Southward along west face of Wasatch Range, Utah, from near the moraines in Dry Cottonwood Canyon. The plane portions of the mountain front represent the fault along which the uplift took place. Salt Lake County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01820 ID. Gilbert, G.K. 1820 Northeastward across Little Cottonwood Valley, from the village of Granite (?), Utah. The terrace at left is part of the Little Cottonwood moraine. The former height of the ice against the mountain face is indicated by a terrace at the upper limit of granite bowlders. Salt Lake County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01821 ID. Gilbert, G.K. 1821 U.S.G.S. camp, at Granite (?), Utah. The cottonwood trees follow the line of an irrigating ditch. Salt Lake County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01822 ID. Gilbert, G.K. 1822 South moraine of Little Cottonwood Canyon from the village of Granite (?), Utah. The bluff descending the face of the moraine from the large boulder is a fault scarp; other irregularities of the moraine are due to faulting. Salt Lake County. 1901. Published as plate 13-A in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01823 ID. Gilbert, G.K. 1823 Face of the Wasatch Range north of Little Cottonwood Canyon, showing triangular facets associated with the frontal fault. Salt Lake County, Utah. 1901. (Panorama with photo nos. 1823a-1823d). #1:/Gilbert1901-Gilbert G.K. Collection/ggk01824 ID. Gilbert, G.K. 1824 Little Cottonwood Canyon, Utah, from village of Granite (?). Salt Lake County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01825 ID. Gilbert, G.K. 1825 Detail of face of Wasatch Range north of Draper, Utah. The mountain front is here composed of a quartzose shear zone, the result of the great, marginal fault. Salt Lake County. 1901. Published as plate 1-B in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01826 ID. Gilbert, G.K. 1826 Traverse (?) Range and Bonneville shore line from Draper, Utah. Salt Lake County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01827 ID. Gilbert, G.K. 1827 West face of Wasatch Range from point southeast of Draper, Utah. At the base of the front is a fault scarp; higher up the Bonneville shore line. Salt Lake County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01828 ID. Gilbert, G.K. 1828 Bonneville shore line on north face of Traverse (?) Range, Utah. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01829 ID. Gilbert, G.K. 1829 Bonneville shore line, Wasatch Range, Utah, looking northward from junction of Wasatch and Traverse (?) Ranges. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01830 ID. Gilbert, G.K. 1830 Spiral ridge and streamway, southwest face of Wasatch Range, Utah, near Traverse (?) Range. 1901. Published as plate 10-B in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01831 ID. Gilbert, G.K. 1831 West slope of Oquirrh Range, Utah. At the right is the valley of Bates Creek. Tooele County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01832 ID. Gilbert, G.K. 1832 Fault scarp at west base of Oquirrh Range, Utah, north of Bates Creek. Tooele County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01833 ID. Gilbert, G.K. 1833 Bonneville shore line 4 miles south of Toelle, Utah. The shore feature here a cliff in alluvium. Subsequent stream work has trenched the alluvium and built alluvial fans on the shore terrace. Tooele County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01834 ID. Gilbert, G.K. 1834 Face of Oquirrh Range, Utah, in the Tooele embayment; looking southwest. In the center of the view Middle Canyon. The slope of the mountain face on both sides of the canyon corresponds to a fault plane. Beyond Middle Canyon the fault passes into the mountain range, dividing the main mass from the western spur. Tooele County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01835 ID. Gilbert, G.K. 1835 Stansbury Range, Utah, looking southward from a summit opposite Grantsville. The more distant of the two high points is Bonneville Peak, occupied by the Coast Survey triangulation. Tooele County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01836 ID. Gilbert, G.K. 1836 Stansbury Range, Utah, looking southward from a summit opposite Grantsville. The left-hand of the two distant peaks is Bonneville Peak, occupied by the Coast Survey triangulation. Tooele County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01837 ID. Gilbert, G.K. 1837 Stansbury Range and Great Salt Lake Desert, Utah, looking northward from a summit opposite Grantsville. The crest profiles indicate an ancient peneplain. Tooele County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01838 ID. Gilbert, G.K. 1838 Bonneville and Provo shore lines on the east side of Stansbury Range, Utah, near its north end. Tooele County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01839 ID. Gilbert, G.K. 1839 Cedar Mountains, Utah, looking northward from point near Ridall Canyon. Tooele County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01840 ID. Gilbert, G.K. 1840 Cedar Mountains, Utah, looking northward from point near Ridall Canyon. Tooele County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01841 ID. Gilbert, G.K. 1841 Scarp on west base of Cedar Mountains, Utah. This scarp is due to faulting, but no evidence was found of very recent movement. Tooele County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01842 ID. Gilbert, G.K. 1842 Fault cliff, western base of Cedar Mountains, Utah. (See no. 1841). Tooele County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01843 ID. Gilbert, G.K. 1843 Bonneville shore spits on west flank of Stansbury Range, Utah, near Kanaka Settlement. Tooele County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01844 ID. Gilbert, G.K. 1844 Fault scarp alone west base of Stansbury Range, Utah. Tooele County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01845 ID. Gilbert, G.K. 1845 Fault scarp along west base of Stansbury Range, Utah. Tooele County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01846 ID. Gilbert, G.K. 1846 Profile and section on west flank of Stansbury Range, Utah. The profile probably corresponds to the plane of faulting. Tooele County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01847 ID. Gilbert, G.K. 1847 Fault scarp west base of Stansbury Range, Utah; Kanaka. Butte in the distance. Tooele County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01848 ID. Gilbert, G.K. 1848 Fault scarp west base of Stansbury Range, Utah, south of Kanaka Settlement. Tooele County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01849 ID. Gilbert, G.K. 1849 Fault scarp west base of Stansbury Range, Utah, south of Kanaka Settlement. Tooele County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01850 ID. Gilbert, G.K. 1850 Low shoulder of spur on west flank of Stansbury Range, Utah, near Indian settlement. This spur is composed of bed rock, and was uplifted after being thoroughly graded. Tooele County. 1901. (Panorama with photo no. 1850a). #1:/Gilbert1901-Gilbert G.K. Collection/ggk01851 ID. Gilbert, G.K. 1851 Junipers growing on sand, east flank of Cedar Range, Utah. Tooele County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01852 ID. Gilbert, G.K. 1852 Junipers growing on sand, east flank of Cedar Range, Utah. Tooele County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01853 ID. Gilbert, G.K. 1853 Low summits of Cedar Range, Utah. The curved contours and profiles of these hills are nearly independent of the rock structure. The rock is limestone, dipping toward the left, Tooele County, 1901 #1:/Gilbert1901-Gilbert G.K. Collection/ggk01854 ID. Gilbert, G.K. 1854 Greasewood, Skull Valley. Tooele County, Utah. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01855 ID. Gilbert, G.K. 1855 Terraces at Point Lookout, Aqui Range, Utah, looking southward across the saddle at Point Lookout. Tooele County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01856 ID. Gilbert, G.K. 1856 Red Pine Mountain, Utah, from the north. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01857 ID. Gilbert, G.K. 1857 North face of Red Pine Mountain, Utah. 1901. (Panorama with photo no. 1857a). #1:/Gilbert1901-Gilbert G.K. Collection/ggk01858 ID. Gilbert, G.K. 1858 Part of north face of Red Pine Mountain, Utah, illustrating a type of sculpture. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01859 ID. Gilbert, G.K. 1859 Desert Buttes from base of Simpson Range, near Indian Springs, Utah, Tooele County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01860 ID. Gilbert, G.K. 1860 Desert Butte from base of Simpson Range, near Indian Springs, Utah, Tooele County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01861 ID. Gilbert, G.K. 1861 West base of Simpson Range, Utah, from the south. At the left Simpson Peak. Tooele County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01862 ID. Gilbert, G.K. 1862 Section of alluvial cone near Indian Springs, Simpson Range, Utah. Tooele County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01863 ID. Gilbert, G.K. 1863 U.S.G.S. camp at Desert Buttes, Salt Lake Desert. Tooele County, Utah. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01864 ID. Gilbert, G.K. 1864 U.S.G.S. camp at Desert Buttes, Salt Lake Desert. Tooele County, Utah. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01865 ID. Gilbert, G.K. 1865 Simpson Springs stage station, west base of Simpson Range, Tooele County, Utah, 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01866 ID. Gilbert, G.K. 1866 Detail of west base of Granite Rock, Salt Lake Desert. Tooele County, Utah. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01867 ID. Gilbert, G.K. 1867 Fault scarp east base of Fish Spring Range, one mile south of Barron's Ranch. One horse stands above, the other below the scarp. The rocks of the cliff are Cambrian. Juab County, Utah. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01868 ID. Gilbert, G.K. 1868 Canyon wall in Fish Spring Range, Utah, south of Barron's Ranch; Cambrian limestones. Juab County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01869 ID. Gilbert, G.K. 1869 Canyon wall in Fish Spring Range, Utah, south of Barron's Ranch; Cambrian limestones. Juab County, 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01870 ID. Gilbert, G.K. 1870 Ranch at Fish Springs, eastern base of Fish Spring Range, Utah. Juab County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01871 ID. Gilbert, G.K. 1871 Fault scarp east base of Fish Spring Range 4 miles south of Fish Springs, Utah, Juab County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01872 ID. Gilbert, G.K. 1872 Fault scarp and Provo shore terrace west base of Dugway Range, Utah, north of Dugway Pass, The fault scarp is older than the shore terrace. Tooele County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01873 ID. Gilbert, G.K. 1873 Fault scarp west base of Dugway Range, Utah, 2 miles south of locality in no. 1872. Tooele County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01874 ID. Gilbert, G.K. 1874 View southward from point north of Dugway Pass, Utah. The principal rock is rhyolite. Tooele County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01875 ID. Gilbert, G.K. 1875 Looking southwest from point north of Dugway Pass. The principal rock of the upland is rhyolite, but Paleozoic limestones appear in the cliffs at the right. Tooele County, Utah. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01876 ID. Gilbert, G.K. 1876 Sandwich Hills between Dugway and Fish Spring Ranges, Utah. Seen from above, Juab County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01877 ID. Gilbert, G.K. 1877 Sally, n.d. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01878 ID. Gilbert, G.K. 1878 Shear zone, Sandwich Hills, west of Dugway Range, Utah. Juab County. 1901 #1:/Gilbert1901-Gilbert G.K. Collection/ggk01879 ID. Gilbert, G.K. 1879 Shear zone, Sandwich Hills, west of Dugway Range, Utah. Juab County. 1901. (Same as photo no. 1879a). #1:/Gilbert1901-Gilbert G.K. Collection/ggk01880 ID. Gilbert, G.K. 1880 West front of Fish Spring Range, Utah, north of Fish Springs mines; Upper Paleozoic limestones. Juab County. 1901. (Similar to photo no. 1880a). #1:/Gilbert1901-Gilbert G.K. Collection/ggk01881 ID. Gilbert, G.K. 1881 Fault cliff and shear zone west front of Fish Spring Range, Utah, 5 miles south of mines. Juab County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01882 ID. Gilbert, G.K. 1882 Fault cliff and shear zone west front of Fish Spring Range, Utah, 5 miles south of mines. Juab County 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01883 ID. Gilbert, G.K. 1883 Fish Spring oasis, Utah, from a peak of the Fish Spring Range. A group of springs rising through the alluvium spread over an arm of the Salt Lake Desert, and supported a vegetation darker than that of the desert. In the distance at left Granite Rock; at right Dugway Range and Sandwich Hills. Juab County, 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01884 ID. Gilbert, G.K. 1884 Fish Spring Range, Utah, looking northward from a peak south of the middle. Juab County, 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01885 ID. Gilbert, G.K. 1885 Fish Spring Range, Utah, looking southward from a peak south of the middle. Juab County. 1901 #1:/Gilbert1901-Gilbert G.K. Collection/ggk01886 ID. Gilbert, G.K. 1886 Calcareous tufa capping a hill of basalt. This is a feature of the Provo shore line contouring a group of hills between Fish Spring and Deep Creek Mountains. Juab County, Utah. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01887 ID. Gilbert, G.K. 1887 Provo shore line on basalt buttes between Fish Spring and Deep Creek Ranges, Utah. Juab County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01888 ID. Gilbert, G.K. 1888 Terrace and cliff of Provo shore line on basalt butte between Fish Spring and Deep Creek Ranges, Utah. Juab County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01889 ID. Gilbert, G.K. 1889 Shear zone between faulted Cambrian limestones near west base of Fish Spring Range, Utah. Juab County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01890 ID. Gilbert, G.K. 1890 These views (1890, 1891) represent a group of rhyplite buttes a few miles west of the middle part of the Fish Spring Range, Utah. They are remnants of a single rhyolitic mass, and contrasted in color with surrounding hills of basalt. The name Lavender Buttes is proposed. No. 1890 shows the southeastern face of the largest butte, contoured at the base by the Bonneville shore line. Juab County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01891 ID. Gilbert, G.K. 1891 Lavender Buttes, Utah, seen from the east. Juab County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01893 ID. Gilbert, G.K. 1893 Lavender Buttes, Utah, from the east. Juab County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01894 ID. Gilbert, G.K. 1894 The western butte of the Lavender group, Utah. Juab County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01895 ID. Gilbert, G.K. 1895 North face of largest Lavender Butte, Utah. Juab County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01897 ID. Gilbert, G.K. 1897 Base of the middle Lavender Butte, Utah. The structure planes dipping toward the left represent neither stratification nor jointing, but are associated with an original arrangement of the minerals composing the rhyolite. Juab County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01898 ID. Gilbert, G.K. 1898 West face of largest Lavender Butte, Utah. Juab County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01899 ID. Gilbert, G.K. 1899 The western butte of the Lavender group, Utah. Juab County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01900 ID. Gilbert, G.K. 1900 West face of largest Lavender Butte, Utah. Juab County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01902 ID. Gilbert, G.K. 1902 Details of sculpture of middle Lavender Butte, Utah. The weathering of the rhyolite produces caves, a character which it shares with other massive rocks of the same arid region. In this view the original structure of the rhyolite dips toward the right; joints are seen inclined steeply to the left. Juab County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01903 ID. Gilbert, G.K. 1903 Details of sculpture of middle Lavender Butte, Utah. Juab County. 1901. (Similar to 1902a). #1:/Gilbert1901-Gilbert G.K. Collection/ggk01904 ID. Gilbert, G.K. 1904 West face of principal Lavender Butte, Utah, showing character of sculpture. Juab County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01905 ID. Gilbert, G.K. 1905 Middle butte of the Lavender group, Utah. The vertical structure is jointing. Juab County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01906 ID. Gilbert, G.K. 1906 Lavender Buttes, Utah, from the east. Juah County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01907 ID. Gilbert, G.K. 1907 Lavender Buttes, Utah, from the south, Juab County. 1901. (Panorama with photo no. 1907a). #1:/Gilbert1901-Gilbert G.K. Collection/ggk01908 ID. Gilbert, G.K. 1908 A fault in Cambrian limestone near west base of Fish Springs Range, Utah. Tooele County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01909 ID. Gilbert, G.K. 1909 Sculpture by a mountain stream, Fish Spring Range, Utah. An intermittent stream draining several square miles of the western slope of the range is here antagonized by the resistance of a massive Cambrian limestone. Above this narrow passage the stream bed is 20 or 30 feet broad. Juab County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01910 ID. Gilbert, G.K. 1910 Dimes at the north end of White Valley, near Sand Pass, Utah, looking southward. Juab County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01911 ID. Gilbert, G.K. 1911 South end of Fish Spring Range, Utah, from the south. At the right Sand Pass. Juab County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01912 ID. Gilbert, G.K. 1912 Cambrian sandstones, Mouse Range, Utah, 2 miles south of Sand Pass, Juab County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01913 ID. Gilbert, G.K. 1913 Eastward spur of Fish Spring Range, Utah, from Cane Springs. Juab County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01914 ID. Gilbert, G.K. 1914 U.S.G.S. camp at Cane Spring, Utah. Juab County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01915 ID. Gilbert, G.K. 1915 Front of Fish Spring Range, Utah, looking northwest from Cane Spring. Juab County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01916 ID. Gilbert, G.K. 1916 Main front and spur of Fish Spring Range, Utah, southwest from Cane Spring, Juab County. 1901. (Panorama with photo no. 1916a). #1:/Gilbert1901-Gilbert G.K. Collection/ggk01917 ID. Gilbert, G.K. 1917 Southern part of east face of Fish Spring Range, Utah, from a point east of Sand Pass. Juab County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01918 ID. Gilbert, G.K. 1918 Looking southward from Sand Pass, at south end of Fish Spring Range, Utah. In the foreground the old channel leading south-westward from the pass. The Provo shore line, and in the distance the Bonneville shore line, are carved on a spur of the House Range, over which appear summits of the range. At right the sandstone hill photographed in no. 1912. Juab County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01919 ID. Gilbert, G.K. 1919 A group of embankments made by waves of Lake Bonneville at the south end of Fish Spring Valley, Utah. Juab County. 1901. (Panorama with photo no. 1919a). #1:/Gilbert1901-Gilbert G.K. Collection/ggk01920 ID. Gilbert, G.K. 1920 Dust whirls, Whirlwind Valley, east of House Range, Utah. Millard County. 1901. (Panorama with photo no. 1921). #1:/Gilbert1901-Gilbert G.K. Collection/ggk01921 ID. Gilbert, G.K. 1921 Dust whirls, Whirlwind Valley, east of House Range, Utah. Millard County. 1901. (Panorama with photo no. 1920). #1:/Gilbert1901-Gilbert G.K. Collection/ggk01922 ID. Gilbert, G.K. 1922 House Range, Utah, looking northward. A fault cliff near North Spring is shown. Millard County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01923 ID. Gilbert, G.K. 1923 Western face of House Range, Utah, from a summit knob. At the left Nipple Peak; at right White Valley. Millard County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01924 ID. Gilbert, G.K. 1924 Part of west front of the House Range, Utah. Millard County. 1901 #1:/Gilbert1901-Gilbert G.K. Collection/ggk01925 ID. Gilbert, G.K. 1925 Pack of House Range, Utah, from the north, with Swasey Mountains in the distance. Millard County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01926 ID. Gilbert, G.K. 1926 Fault or landslide cliff near North Spring, House Range, Utah. Millard County. 1901. (Panorama with photo no. 1926a). #1:/Gilbert1901-Gilbert G.K. Collection/ggk01927 ID. Gilbert, G.K. 1927 West front of House Range, Utah, from a summit at the south. The prominent point is Tatow Knob. In the distance at left the Fish Spring Range. The strata are Cambrian. Millard County. 1901. Published as plate 33-A in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01928 ID. Gilbert, G.K. 1928 Dust whirls in Whirlwind Valley, east, of House Range, Utah. Millard County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01929 ID. Gilbert, G.K. 1929 Detail of north wall of Dome Canyon, House Range, Utah. The view is toward the west. The limestone masses at right and left are portions of the same stratum. Close to the left mass is a fault plane. Millard County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01930 ID. Gilbert, G.K. 1930 West face of House Range, Utah, looking southward from a foothill south of Dome Canyon. The high cliffs are of Cambrian limestone; the nearer hills of Cambrian sandstone. Millard County. 1901. (Same as photo no. 1930a). #1:/Gilbert1901-Gilbert G.K. Collection/ggk01931 ID. Gilbert, G.K. 1931 West face of House Range, Utah, from foothills south of Dome Canyon. The cliffs of the mountain face are of Cambrian limestone, the foot slope and the foreground of Cambrian sandstone. Millard County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01932 ID. Gilbert, G.K. 1932 West face of House Range, Utah, between Dome and Marjum Canyons. Millard County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01933 ID. Gilbert, G.K. 1933 West face of House Range, Utah, between Dome and Marjum Canyons. Millard County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01934 ID. Gilbert, G.K. 1934 West face of House Range, Utah, between Done and Marjum Canyons. The upper cliffs are of Cambrian limestone, the lower slopes chiefly of underlying Cambrian sandstone, but Cambrian limestones of a lower-lying orographic block form foothills with low cliffs. Millard County. 1901. (Panorama with photo no. 1934a) #1:/Gilbert1901-Gilbert G.K. Collection/ggk01935 ID. Gilbert, G.K. 1935 West front of House Range, Utah, south of Antelope Pass. Shows Antelope Pass at the left. Millard County. 1901. (Panorama with photo nos. 1935a, 1935b). #1:/Gilbert1901-Gilbert G.K. Collection/ggk01936 ID. Gilbert, G.K. 1936 West front of House Range, Utah, a little north of Swasey Peak. Cambrian limestone overlying Cambrian sandstone, Millard County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01937 ID. Gilbert, G.K. 1937 Caves in Cambrian limestone, Death Canyon, House Range, Utah. Millard County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01938 ID. Gilbert, G.K. 1938 Caves in shear zone between blocks of Cambrian limestone, Death Canyon, House Range, Utah. Millard County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01939 ID. Gilbert, G.K. 1939 Eastern slope of House Range, Utah, south of Marjum Pass. County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01940 ID. Gilbert, G.K. 1940 Western base of House Range, Utah, one mile north of Dome Canyon. At left are Cambrian sandstones, overlooked by a distant cliff of Cambrian limestone. At right are Cambrian limestones separated from the sandstone by a fault. Millard County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01941 ID. Gilbert, G.K. 1941 Bluff south of Rainbow Valley, House Range, Utah. Shales and limestones of the Cambrian system. Millard County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01942 ID. Gilbert, G.K. 1942 Bluff south of Rainbow Valley, House Range, Utah. Shales and limestones of the Cambrian system. Millard County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01943 ID. Gilbert, G.K. 1943 Eastward slope of House Range, Utah, south of Marjum Pass. Millard County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01944 ID. Gilbert, G.K. 1944 Western part of Rainbow Valley, Utah, and head of Marjum Canyon. In the distance White Valley and the Confusion Range. Rainbow Valley follows the outcrop of Cambrian shales, and crosses the House Range obliquely from northeast to southwest. It's more distant part drains directly to White Valley; the drainage of the nearer portions crosses the ridge of underlying limestones, leaving the valley in two canyons, which soon join. Millard County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01945 ID. Gilbert, G.K. 1945 Rainbow Valley and Marjum Canyon, Utah. In the distance White Valley and the Confusion Range. Rainbow Valley follows the outcrop of Cambrian shales, and crosses the House Range obliquely from northeast to southwest. It's more distant part drains directly to White Valley; the drainage of the nearer portions crosses the ridge of underlying limestones, leaving the valley in two canyons, which soon join. Millard County. 1901. (Panorama with photo nos. 1945a, 1945b). #1:/Gilbert1901-Gilbert G.K. Collection/ggk01946 ID. Gilbert, G.K. 1946 Bluff south of Rainbow Valley, House Range, Utah. Milliard County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01947 ID. Gilbert, G.K. 1947 Rainbow Valley, House Range, Utah. The view looks northeastward up the valley, with the main mass of the range at the left. Millard County. 1901. (Panorama with photo no. 1947a) #1:/Gilbert1901-Gilbert G.K. Collection/ggk01948 ID. Gilbert, G.K. 1948 House Range; Marjum Canyon from the east. Foreground is part of Rainbow Valley, a monoclinal valley occupying the outcrop of the Rainbow shales. A considerable portion of its drainage here descends against the dip, through the underlying limestones, to White Valley. Millard County, Utah. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01949 ID. Gilbert, G.K. 1949 Hillock of gypsiferous earth, White Valley, western Utah. The mound is analogous to a dune, being eaten away on the windward side and receiving additions on the lee side, which sustains a growth of bushes. The view shows the windward side, in this case turned toward the north. Millard County, Utah. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01950 ID. Gilbert, G.K. 1950 Lee side of hillock shown in photo no. 1949. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01951 ID. Gilbert, G.K. 1951 (General Collection 903) White Valley, western Utah. A portion of the valley floor is composed of hillocks of fine earth analouous to dunes. Millard County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01952 ID. Gilbert, G.K. 1952 White Valley, western Utah; playa of gypsiferous adobe. It is here crossed by the wagon road between Antelope and Rush Springs. The near wagon is the property of the Geological Survey. Millard County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01953 ID. Gilbert, G.K. 1953 White Valley, western Utah. Bunghole Spring, on the main road westward from Antelope Spring. The water of the spring after running 200 yards and spreading somewhat over the ground, pours into cracks in the soil and disappears. The principal point of descent appears in the picture. Millard County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01954 ID. Gilbert, G.K. 1954 White Valley, western Utah. In the foreground a playa crossed by the wagon road; in the distance the western face of the House Range. Millard County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01955 ID. Gilbert, G.K. 1955 White Valley, western Utah. In the foreground a playa crossed by the wagon road; in the distance the western face of the House Range. Millard County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01956 ID. Gilbert, G.K. 1956 White Valley, western Utah, looking southeast from Coyote Spring. The House Range in the distance. Millard County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk01957 ID. Gilbert, G.K. 1957 Redding Spring, on the Great Salt Lake Desert, near the base of Deep Creek Range. Tooele County, Utah. 1901. #1:/New York/ggk01958 ID. Gilbert, G.K. 1958 New York. Canyon of the Genesee River below the lower falls near Rochester. There is now a bridge at this point. The white band and all below it belong to the Medina Formation. The strata above it are of the Clinton group. Photo by W.W. Gilbert, circa 1895. #1:/New York/ggk01959 ID. Gilbert, G.K. 1959 New York. Taghanic Falls near Ithaca. The sheer descent is about 200 feet. The rock is shale of the Ithaca formation. Photo by W.W. Gilbert. #1:/New York/ggk01960 ID. Gilbert, G.K. 1960 New York. Trees near the lower falls of Genesee River near Rochester. Each winter these trees are coated with ice from the spray of the falls, and their branches are thus bent down. #1:/New York/ggk01961 ID. Gilbert, G.K. 1961 New York. Trees near the lower falls of Genesee River near Rochester. Each winter these trees are coated with ice from the spray of the falls, and their branches are thus bent down. Photo by W.W. Gilbert, circa 1895. #1:/New York/ggk01962 ID. Gilbert, G.K. 1962 New York. Taghanic Falls near Ithaca. The sheer descent is about 200 feet. The rock is shale of the Ithaca Formation. Photo by W.W. Gilbert, circa 1895. #1:/New York/ggk01963 ID. Gilbert, G.K. 1963 New York. Taghanic Falls near Ithaca. The sheer descent is about 200 feet. The rock is shale of the Ithaca Formation. Photo by W.W. Gilbert, circa 1895. #1:/New York/ggk01964 ID. Gilbert, G.K. 1964 New York. Buttress on the north wall of Fall Creek at Ithaca near the electric railway bridge. The erosion of the gorge wall is partly controlled by joints. Circa 1895. #1:/Gilbert1895-Gilbert G.W. Collection/ggk01965 ID. Gilbert, G.K. 1965 Tadpoles and tadpole nests. These pits in the soft bottom of a shallow pool are supposed to be made by tadpoles. Edward Hitchcock named a somewhat similar marking on layers of the Newark Sandstone Batrachoides nidificans, ca. 1895. Photo by W.W. Gilbert. #1:/New York/ggk01966 ID. Gilbert, G.K. 1966 New York. Joints in the shore of Cayuga Lake. Photo by W.W. Gilbert, circa 1895. #1:/New York/ggk01967 ID. Gilbert, G.K. 1967 New York. Cayuga Lake, viewed from the campus of Cornell University. The hill-slopes bordering the lake are products of ice sculpture. Photo by W.W. Gilbert, circa 1895. #1:/New York/ggk01968 ID. Gilbert, G.K. 1968 New York. Gorge of Fall Creek at Ithaca. View downstream, with the crest of Ithaca Falls in the distance. The buttresses at the right are partly determined by joints. Circa 1895. #1:/Gilbert1903-Gilbert G.K. Collection/ggk01969 ID. Gilbert, G.K. 1969 Fir trees on west slope of valley near Mineral King, California. The trees were bent as saplings by snow creeping down the slope. Tulare County. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk01970 ID. Gilbert, G.K. 1970 Fir trees and saplings on west slope of valley near Mineral King, California. Illustrating the bending of trunks by the pressure of snow creeping down the slope. Tulare County. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk01971 ID. Gilbert, G.K. 1971 Fir trees on slope west of Coyote Pass, between the forks of Kern River. Altitude 10,000 feet. Tulare County, California. 1903. #1:/Sequoia National Park/ggk01972 ID. Gilbert, G.K. 1972 Sequoia National Park, California. Sequoia gigantea among firs in Giant Forest. 1903. #1:/Sequoia National Park/ggk01973 ID. Gilbert, G.K. 1973 Sequoia National Park, California. Base of Sequoia gigantean in Giant Forest. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk01974 ID. Gilbert, G.K. 1974 Sequoia gigantea, Sequoia National Park, Tulare County, California. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk01975 ID. Gilbert, G.K. 1975 Foothill slopes of Sierra Nevada near Redstone, California. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk01976 ID. Gilbert, G.K. 1976 Oak tree with mistletoe, Redstone, California. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk01977 ID. Gilbert, G.K. 1977 Oaks, Redstone, California. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk01978 ID. Gilbert, G.K. 1978 Section of lava stream, Volcano Creek, at lower crossing of Whitney Trail, Kern Basin, Tulare County, California. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk01979 ID. Gilbert, G.K. 1979 Section of lava stream near mouth of Volcano Creek, Kern Basin, California. Regular columns in lower part of stream; irregular in upper. Tulare County. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk01980 ID. Gilbert, G.K. 1980 Cinder cone on Volcano Creek, Kern Basin, California. Looking east from the western cinder cone. Lava stream in foreground; slopes of granite at right and left. Tulare County. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk01981 ID. Gilbert, G.K. 1981 Cinder cone on Volcano Creek, Kern Basin, California. The westernmost of the group; seen from the north. Tulare County. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk01982 ID. Gilbert, G.K. 1982 Cinder cone on Volcano Creek, Kern Basin, California. The western most of the group; seen from the north. Tulare County. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk01983 ID. Gilbert, G.K. 1983 Canyon of Kern River, California, View southward from a hill one mile north of Soda Springs. The hills in the valley are massive blocks slidden from the west (right) wall. Beyond the first is a glimpse of Upper Kern Lake. Tulare County. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk01984 ID. Gilbert, G.K. 1984 View in Kern Valley, California, one mile south of Soda Springs. At left is the crest of a hill constituted of a slidden block; at right a waste slope from the main wall of the valley. The trees are yellow pine. Tulare County. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk01985 ID. Gilbert, G.K. 1985 East wall of Kern Canyon, California, from west bank of river near Upper Kern Lake. Tulare County. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk01986 ID. Gilbert, G.K. 1986 Northward across Upper Kern Lake, California. Dead Cottonwood trees standing in the water were drowned when the lake was formed by the increase of an alluvial cone. The change from meadow to lake is said to have occurred between the summers of 1867 and 1868. Tulare County. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk01987 ID. Gilbert, G.K. 1987 Alluvial cone in canyon of Kern River, California, between Upper and Lower Kern Lakes. An addition to the cone caused a renewal of the lake, which had become filled by alluvium. Tulare County. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk01988 ID. Gilbert, G.K. 1988 East wall of Kern Canyon, California, from hill below Upper Kern Lake; looking northeast. Tulare County. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk01989 ID. Gilbert, G.K. 1989 View northeastward across Lower Kern Lake, California. Above the lake the canyon is occupied by large granite masses slidden from the west wall (at left). The river passes these in a narrow canyon following the east wall, and becomes visible at the right of the lake after issuing from this canyon. In middle distance at left is Tower Rock. Tulare County. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk01990 ID. Gilbert, G.K. 1990 Southward across Lower Kern Lake, California. From hill constituted of slidden mass between the two lakes. The largest slidden mass makes the hill at right. At left is a large landslide of shattered rock; shown also in photo no. 1992. Tulare County. 1903. (Panorama with photo no. 1991). #1:/Gilbert1903-Gilbert G.K. Collection/ggk01991 ID. Gilbert, G.K. 1991 View southward across Lower Kern Lake, California. Showing west wall of Kern Canyon and hill mass slidden therefrom. Tulare County. 1903. (Panorama with photo no. 1990). #1:/Gilbert1903-Gilbert G.K. Collection/ggk01992 ID. Gilbert, G.K. 1992 (General Collection 2604) View southward from hill near Lower Kern Lake, California. At the right a hill constituted of a slidden mass of granite from the west wall; at left a rock slide from the east wall, which created the lower lake by damming the river. The slide is otherwise shown in photo nos. 1990, 1993, and 1994. Tulare County. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk01993 ID. Gilbert, G.K. 1993 Panorama from the hill shown at right in 1990 and 1992. View across Kern Canyon from west to east, showing a large rock slide and the hillside scar from which it descended. The principal plane of motion was a joint. Material, granite. Tulare County, California. 1903. (Panorama with photo no. 1994). #1:/Gilbert1903-Gilbert G.K. Collection/ggk01994 ID. Gilbert, G.K. 1994 Panorama from the hill shown at right in 1990 and 1992. View across Kern Canyon from west to east, showing a large rock slide and the hillside scar from which it descended. The principal plane of motion was a joint. Material, granite. Tulare County, California. 1903. (Panorama with photo no. 1993). #1:/Gilbert1903-Gilbert G.K. Collection/ggk01995 ID. Gilbert, G.K. 1995 Northward up Kern Canyon, California, from a talus slope one mile north of Soda Springs. The canyon was occupied by a Pleistocene glacier. Above its cliffs are gentler slopes. Compare with 1998 and following views. The mountain in the distance is Red Ridge. Tulare County. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk01996 ID. Gilbert, G.K. 1996 Northward up Kern Canyon, California, from a talus slope one mile north of Soda Springs. See 1995. Tulare County. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk01997 ID. Gilbert, G.K. 1997 Northward up Kern Canyon, California, from a talus slope one mile north of Soda Springs. Tulare County. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk01998 ID. Gilbert, G.K. 1998 (General Collection 1701) Upper part of Kern Canyon, California. View northward from trail climbing east wall near Junction Meadows. Tulare County. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk01999 ID. Gilbert, G.K. 1999 Down Kern Canyon, California, from point on trail near Junction Meadows, The sky line at left suggests the terrace or sloping plain above the canyon wall. The summit of Mount Guyot projects above the edge of this plain. Tulare County. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk02000 ID. Gilbert, G.K. 2000 West wall of Kern Canyon, California, from trail descending east wall near Junction Meadows. At left Kaweah Peaks, overlooking a terrace slope; at right the glaciated valley of Junction Peak. Tulare County. 1903. (Panorama with photo no. 2001). #1:/Gilbert1903-Gilbert G.K. Collection/ggk02001 ID. Gilbert, G.K. 2001 West wall of Kern Canyon, California, from trail descending east wall near Junction Meadows. At left Kaweah Peaks, overlooking a terrace slope; at right the glaciated valley of Junction Peak. Tulare County. 1903. (Panorama with photo no. 2000). #1:/Gilbert1903-Gilbert G.K. Collection/ggk02002 ID. Gilbert, G.K. 2002 Panorama from Mount Guyot, California, from west (through north) to east. Photo no. 2002 shows Kern Canyon with flanking terraces and Kaweah Peaks beyond. At left is the spur from Kaweah Peaks known as Red Ridge. Tulare County. 1903. (Panorama with photo nos. 2003-2007). #1:/Gilbert1903-Gilbert G.K. Collection/ggk02003 ID. Gilbert, G.K. 2003 Upper part of Kern Canyon, California, and flanking terraces; seen from Mount Guyot. Tulare County. 1903. (Panorama with photo nos. 2002, 2004-2007). #1:/Gilbert1903-Gilbert G.K. Collection/ggk02004 ID. Gilbert, G.K. 2004 View northward from Mount Guyot, California. Tulare County. 1903. (Panorama with photo nos. 2002-2003, 2005-2007). #1:/Gilbert1903-Gilbert G.K. Collection/ggk02005 ID. Gilbert, G.K. 2005 Spur of "main divide" east of Mount Guyot, California. "Sand flat" in foreground. Tulare County. 1903. (Panorama with photo nos. 2002-2004, 2006-2007). #1:/Gilbert1903-Gilbert G.K. Collection/ggk02006 ID. Gilbert, G.K. 2006 Southeastward from Mount Guyot, California. The timbered region is part of the plateau upland. The mountains beyond are spurs of the "main divide". Tulare County. 1903. (Panorama with photo nos. 2002-2005, 2007). #1:/Gilbert1903-Gilbert G.K. Collection/ggk02007 ID. Gilbert, G.K. 2007 Southeastward from Mount Guyot, California. Tulare County. 1903. (Panorama with photo nos. 2002-2006). #1:/Gilbert1903-Gilbert G.K. Collection/ggk02008 ID. Gilbert, G.K. 2008 Northward across Siberian Outpost, California, an upland plain of the Sierra Nevada, Cirque Mountain Peak in the distance. Tulare County. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk02009 ID. Gilbert, G.K. 2009 Southward across valley of Rock Creek, an eastern tributary of Kern River. The valley was occupied by a glacier, and much of the slope in the view is constituted of moraines. Beyond these is a hanging valley, also glacial, and overlooked by a remnant of ancient plateau. Tulare County, California. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk02010 ID. Gilbert, G.K. 2010 Granite upland north of Volcano Creek, Tulare County, California. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk02011 ID. Gilbert, G.K. 2011 Granite upland north of Volcano Creek, California. Seen from cinder cone. Part of the crater appears in the foreground. Tulare County. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk02012 ID. Gilbert, G.K. 2012 Summit of Mount Whitney, California. The gently sloping top is a remnant of ancient topography. The granite blocks are fragments riven from the solid mass below. Tulare County. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk02013 ID. Gilbert, G.K. 2013 View southward from summit of Mount Whitney. Tulare County, California. 1903. (Panorama with photo no. 2014). #1:/Gilbert1903-Gilbert G.K. Collection/ggk02014 ID. Gilbert, G.K. 2014 View southward from summit of Mount Whitney. In the distance at the left is Sheep Mountain, or Old Mount Whitney. The nearby cirques head canyons descending to Owens Valley. Tulare County, California. 1903. (Panorama with photo no. 2013). #1:/Gilbert1903-Gilbert G.K. Collection/ggk02015 ID. Gilbert, G.K. 2015 View northward from summit of Mount Whitney. The spoon-bowl valley is a remnant of ancient topography, and is surrounded by cliffs descending to cirques. Material, granite. Tulare County, California. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk02016 ID. Gilbert, G.K. 2016 South cliff of the cirque at head of North Fork of Whitney Creek, Tulare County, California. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk02017 ID. Gilbert, G.K. 2017 Part of south wall of gorge of Whitney Creek, California. The part represented lies west of that in photo no. 2016. Glacial tarn in foreground. Tulare County. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk02018 ID. Gilbert, G.K. 2018 East wall of canyon of North Fork of Whitney Creek, California, at timber line. Tulare County. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk02019 ID. Gilbert, G.K. 2019 Rock-basin lake, canyon of Whitney Creek, California. Tulare County. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk02020 ID. Gilbert, G.K. 2020 Upper valley of Little Kern River, California. Farewell Gap in distance at right. The view looks north. The valley was occupied by a glacier, and the hanging valleys seen in its west wall contained tributary glaciers. Tulare County, 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk02021 ID. Gilbert, G.K. 2021 Cirque and hanging valley above Bullion Flat, Little Kern River, California. Tulare County. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk02022 ID. Gilbert, G.K. 2022 Northwest side of "western divide" from Bearpaw Meadow, California, the north-facing walls of glacial valleys are steeper than the south facing walls, and domes are worn away on their north sides. The nearer cliff shows dome structure. Tulare County. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk02023 ID. Gilbert, G.K. 2023 Stream meanders, Volcano Creek, Tulare County, California. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk02024 ID. Gilbert, G.K. 2024 Stream meanders, Volcano Creek, Tulare County, California. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk02025 ID. Gilbert, G.K. 2025 Stream meanders, Volcano Creek, Tulare County, California. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk02026 ID. Gilbert, G.K. 2026 Roches moutonnees in canyon descending northward from Timber Gap, California. Tulare County. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk02027 ID. Gilbert, G.K. 2027 Side view of granite boss at stoss end; Whitney Creek, California. The ice movement was from left to right, and the rock was removed by plucking. Tulare County. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk02028 ID. Gilbert, G.K. 2028 Lee face of granite boss, Whitney Creek, California. Illustrating erosion by plucking. Tulare County. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk02029 ID. Gilbert, G.K. 2029 Joints in granite, Whitney Creek, California, looking south. Tulare County. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk02030 ID. Gilbert, G.K. 2030 Joints in granite, Whitney Creek, California, looking north. Tulare County. 1903. Published as plate 41-B in U.S. Geological Survey. Professional paper 160. 1930. #1:/Gilbert1903-Gilbert G.K. Collection/ggk02031 ID. Gilbert, G.K. 2031 Granite bowlder undergoing reduction by the separation of large flakes; spur between forks of Little Kern River, California. The flaking is believed to be due to heat caused by forest fires. Tulare County. 1903. #1:/Sequoia National Park/ggk02032 ID. Gilbert, G.K. 2032 Sequoia National Park, California. Granite boulder in Giant Forest shaped by exfoliation. The boulder is about 40 feet in diameter; the separated fragment resting on it about 10 feet thick. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk02033 ID. Gilbert, G.K. 2033 (General Collection 2301) Granite with inclusions of darker crystalline rock; Coyote Pass, west of Soda Springs, Kern River, California. Through a considerable area the granite is suffused with inclusions. Tulare County. 1903. #1:/Yosemite National Park/ggk02034 ID. Gilbert, G.K. 2034 Yosemite National Park, California. Glacial striae on a nearly vertical granite wall near Maclure Glacier. The ice moved from left to right. 1903. #1:/Yosemite National Park/ggk02035 ID. Gilbert, G.K. 2035: Yosemite National Park, California. Glacial striae and polish on granite in the upper valley of Ireland Creek illustrates the leeward prolongation of hollows initiated by weak spots in the rock. This feature is diagnostic of the ice direction. 1903. #1:/Yosemite National Park/ggk02036 ID. Gilbert, G.K. 2036 Yosemite National Park, California. Glacial striae and chattermarks in granite in the canyon of the Tuolumne River, 3 miles below Rock Canyon. The ice moved from left to right. 1903. #1:/Yosemite National Park/ggk02037 ID. Gilbert, G.K. 2037 Yosemite National Park, California. Glacial smoothing and chattermarks at the west end of Tuolumne Meadows. The marks are on the stoss side of the granite dome. The one at the right of the hat spans 6 feet and is 3 inches deep. 1903. #1:/Yosemite National Park/ggk02038 ID. Gilbert, G.K. 2038 Yosemite National Park, California. Glacial polish and chattermarks in granite between McGee Lake and Cathedral Creek. The direction of ice motion is from right to left, rising obliquely. The length of the hammer head is 6.5 inches. It is noteworthy that the deep gouges are convex forward and that many of the mere cracks are concave forward. 1903. #1:/Yosemite National Park/ggk02039 ID. Gilbert, G.K. 2039 Yosemite National Park, California. Glacial striae, polish, and chattermarks in granite between McGee Lake and Cathedral Lake. It is noteworthy that the deep gouges are convex forward and that many of the mere cracks are concave forward. 1903. #1:/Yosemite National Park/ggk02040 ID. Gilbert, G.K. 2040 Yosemite National Park, California. Glacial striae 1 mile northwest of Mono Pass. The direction of ice motion was from the distance toward the foreground. The principal striated surface is a joint face from which a block has been removed by plucking. Note that the right margin of this face, lying in the lee of a more prominent rock, has few striae and retains the character of a joint wall. The left margin is more worn and more thoroughly striated and is scored at the top by rough chattermarks. 1903. #1:/Yosemite National Park/ggk02041 ID. Gilbert, G.K. 2041 Yosemite National Park, California. Glaciated rock, illustrating stoss and lee features, between Mono Pass and Parker Pass. The ice motion was from right to left. The rock is massive and intersected by joints. 1903. #1:/Yosemite National Park/ggk02042 ID. Gilbert, G.K. 2042 Yosemite National Park, California. Hill of granite between Emeric Creek and Fletcher Creek, illustrating glacial sculpture. The ice motion was from left to right. 1903. #1:/Yosemite National Park/ggk02043 ID. Gilbert, G.K. 2043 Yosemite National Park, California. Glacial sculpture between Mono Pass and Parker Pass. The ice motion was from right to left. The hollows left by the plucking away of blocks of rock are less modified by subsequent abrasion than the surrounding prominences. 1903. #1:/Yosemite National Park/ggk02044 ID. Gilbert, G.K. 2044 Yosemite National Park, California. Glaciated rocks between Mono Pass and Parker Pass in the Sierra Nevada. The direction of ice motion was from right to left. A joint face on the lee side, exposed by the plucking away of a block, remains unscored. 1903. #1:/Yosemite National Park/ggk02045 ID. Gilbert, G.K. 2045 Yosemite National Park, California. Glaciated rock between Mono Pass and Parker Pass. The direction of ice motion was from the foreground on the right toward the distance on the left. An angular cavity, due to the plucking of a block separated by joint planes, was modified by subsequent abrasion. The hill beyond is a spur of Mount Gibbs. 1903. #1:/Yosemite National Park/ggk02046 ID. Gilbert, G.K. 2046 Yosemite National Park, California. Giant kettle near the south end of Tuolumne Meadows. The general direction of ice movement was from east to west. The kettle is on the southwestern slope of a granite dome about 30 feet above its base. The boulders which constitute part of the filling of the kettle are well rounded. The tree on the left grows in a second kettle hole. 1903. #1:/Yosemite National Park/ggk02047 ID. Gilbert, G.K. 2047 Yosemite National Park, California. Giant semi-kettles near the south end of Tuolumne Meadows. These are spoon-shaped hollows with highly polished surfaces occurring on the slope of a granite dome in association with kettle holes. They may be regarded as incipient giant kettles or as the durable portions of kettles whose walls were in part of rock and in part of ice. Other parts of the dome show glacial striae and polish. 1903. #1:/Yosemite National Park/ggk02048 ID. Gilbert, G.K. 2048 Yosemite National Park, California. Perched boulder resting on a larger boulder at Moraine Flat near Tuolumne Meadows. 1903. #1:/Yosemite National Park/ggk02049 ID. Gilbert, G.K. 2049 Yosemite National Park, California. Glacial striae and polish on granite near Cathedral Lake. The granite is porphyritic, and its feldspar phenocrysts are seen in the foreground. The polish resists atmospheric attack and finally yields by exfoliation. When a layer has once been removed, disintegration proceeds with comparative rapidity. 1903. #1:/Yosemite National Park/ggk02050 ID. Gilbert, G.K. 2050 Yosemite National Park, California. Glacial striae and polish on granite near Cathedral Lake. The granite is porphyritic, and its feldspar phenocrysts are seen in the foreground. The polish resists atmospheric attack and finally yields by exfoliation. When a layer has once been removed, disintegration proceeds with comparative rapidity. 1903. #1:/Yosemite National Park/ggk02051 ID. Gilbert, G.K. 2051 Yosemite National Park, California. Glacial polish and exfoliation in the lower canyon of Cathedral Creek. The material is granite. Exfoliation is an important factor in weathering. The polish is usually carried away along with a thin scale of granite, and other scales follow. 1903. #1:/Yosemite National Park/ggk02052 ID. Gilbert, G.K. 2052 Yosemite National Park, California. Boulder of granite undergoing exfoliation at Moraine Flat near Tuolumne Meadows. The exfoliation is probably caused by heating from forest fires. 1903. #1:/Yosemite National Park/ggk02053 ID. Gilbert, G.K. 2053 Yosemite National Park, California. Granite boulder in a meadow at the base of Sunrise Mountain, illustrating rounding of angles by weathering. 1903. #1:/Yosemite National Park/ggk02054 ID. Gilbert, G.K. 2054 Yosemite National Park, California. Granite boulder breaking by natural fracturing. 1903. #1:/Yosemite National Park/ggk02055 ID. Gilbert, G.K. 2055 Yosemite National Park, California. Summit of an unglaciated peak above timberline. The material is granite. It is broken into large blocks, which are disturbed as though by frost, but not transported. Their angles are usually sharp, and the crevices are not occupied by soil. 1903. #1:/Yosemite National Park/ggk02056 ID. Gilbert, G.K. 2056 Yosemite National Park, California. Bed of the Tuolumne River above Rock Canyon Trail. At high stage the river sends a swift current over the granite rock in the foreground, which becomes striated, polished, and grooved. 1903. #1:/Yosemite National Park/ggk02057 ID. Gilbert, G.K. 2057 Yosemite National Park, California. Stream meanders on the Tuolumne River in Lyell Canyon. 1903. #1:/Yosemite National Park/ggk02058 ID. Gilbert, G.K. 2058 Yosemite National Park, California. Ice rampart on the shore of a lake near the head of Rafferty Creek at an altitude of 10,300 feet. 1903. #1:/Yosemite National Park/ggk02059 ID. Gilbert, G.K. 2059 Yosemite National Park, California. Ice rampart on the shore of the lake near the head of Rafferty Creek. Altitude is 10,300 feet. The outlet is just beyond the horseman. 1903. #1:/Yosemite National Park/ggk02060 ID. Gilbert, G.K. 2060 Yosemite National Park, California. Pocket of feldspar crystals in granite near Round Meadow on the Tuolumne River. The largest crystal is 5 inches in diameter. The pocket occurs in a granite characterized by scattered phenocrysts of feldspar. In some tracts, the phenocrysts are partly concentrated in bunches or pockets. 1903. #1:/Yosemite National Park/ggk02061 ID. Gilbert, G.K. 2061 Yosemite National Park, California. Wasting snow drift near Kuna Crest. August 1903. #1:/Yosemite National Park/ggk02062 ID. Gilbert, G.K. 2062 Yosemite National Park, California. Wasting snow drift near Kuna Crest. August 1903. #1:/Yosemite National Park/ggk02063 ID. Gilbert, G.K. 2063 Yosemite National Park, California. Cliff and plain east of Unicorn Pass. The granite is traversed by nearly vertical zones of incipient schistosity which influence sculpture. The pass seen on the right is determined by a broader zone. On the plain are trunks of pine trees which have been brought by avalanches from a cirque on the right. 1903. #1:/Yosemite National Park/ggk02064 ID. Gilbert, G.K. 2064 Yosemite National Park, California. Joints in granite at Kuna Crest. The cliff is part of the wall of a glacial cirque. 1903. #1:/Yosemite National Park/ggk02065 ID. Gilbert, G.K. 2065 Yosemite National Park, California. Joints in granite at Kuna Crest. The cliff is part of the wall of a glacial cirque. Above it is a remnant of preglacial topography. 1903. #1:/Yosemite National Park/ggk02066 ID. Gilbert, G.K. 2066 Yosemite National Park, California. Joints in granite at Kuna Crest. The cliff is part of the wall of a glacial cirque. Above it is a remnant of preglacial topography. 1903. #1:/Yosemite National Park/ggk02067 ID. Gilbert, G.K. 2067 Yosemite National Park, California. Valley of Emeric Creek and Fletcher Creek, viewed from Tuolumne Pass. Between the creeks is a low ridge. The granite of the foreground is traversed by a network of joints. 1903. #1:/Yosemite National Park/ggk02068 ID. Gilbert, G.K. 2068 Yosemite National Park, California. Cliff near the lower end of Fletcher Creek, showing joints and fault plane. 1903. #1:/Yosemite National Park/ggk02069 ID. Gilbert, G.K. 2069 Yosemite National Park, California. Cliff southwest of Fletcher Lake, showing joints in granite. 1903. #1:/Yosemite National Park/ggk02070 ID. Gilbert, G.K. 2070 Yosemite National Park, California. Cliff east of Fletcher Lake, showing granite traversed by veins of aplite (or aplite and pegmatite). 1903. #1:/Yosemite National Park/ggk02071 ID. Gilbert, G.K. 2071 Yosemite National Park, California. Unglaciated summit between Ireland Creek and Fletcher Creek. The pyramidal apex occupied by loose angular blocks nearly in-situ is characteristic of nunataks in this region. 1903. #1:/Yosemite National Park/ggk02072 ID. Gilbert, G.K. 2072 Yosemite National Park, California. Domes near Cathedral Peak, viewed from the dome northeast of Tenaya Lake. Fairview Dome on the extreme left. Cathedral Peak on the right. 1903. Photos ggk02072 and ggk02073 form a panorama. #1:/Yosemite National Park/ggk02073 ID. Gilbert, G.K. 2073 Yosemite National Park, California. Cathedral group of peaks in the Sierra Nevada, viewed from the dome northeast of Tenaya Lake. Cathedral Peak on the left. Cathedral Lake on the left and Echo Peak beyond it. 1903. Photos ggk02072 and ggk02073 form a panorama. #1:/Yosemite National Park/ggk02074 ID. Gilbert, G.K. 2074 Yosemite National Park, California. Mount Conness on the left across the Tuolumne Valley. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk02075 ID. Gilbert, G.K. 2075 The Ritter group of peaks, Sierra Nevada, California, from the northwest. The camera stood near Donohue Pass. The high sharp point at the left is Banner Peak; next to it is Mount Ritter. Madera County. 1903. #1:/Yosemite National Park/ggk02076 ID. Gilbert, G.K. 2076 Yosemite National Park, California. Moraine-dammed lake 1 mile east of Fletcher Lake. 1903. #1:/Yosemite National Park/ggk02077 ID. Gilbert, G.K. 2077 Yosemite National Park, California. Moraine-dammed lake 1 mile east of Fletcher Lake. 1903. Photos ggk02077 and ggk02078 form a panorama. #1:/Yosemite National Park/ggk02078 ID. Gilbert, G.K. 2078 Yosemite National Park, California. Moraine-dammed lake 1 mile east of Fletcher Lake. 1903. Photos ggk02077 and ggk02078 form a panorama. #1:/Yosemite National Park/ggk02079 ID. Gilbert, G.K. 2079 Yosemite National Park, California. Fletcher Lake, viewed from the east. 1903. #1:/Yosemite National Park/ggk02080 ID. Gilbert, G.K. 2080 Yosemite National Park, California. Fletcher Lake, viewed from the east. 1903. #1:/Yosemite National Park/ggk02081 ID. Gilbert, G.K. 2081 Yosemite National Park, California. Upper valley of Fletcher Creek, viewed from the west. 1903. #1:/Yosemite National Park/ggk02082 ID. Gilbert, G.K. 2082 Yosemite National Park, California. Rock-basin lake of the Fletcher chain. The hanging valley on the left contains Vogelsang Lake. In the center beyond the lake is a large rock slide. 1903. #1:/Yosemite National Park/ggk02083 ID. Gilbert, G.K. 2083 Yosemite National Park, California. Vogelsang Peak and the hanging valley north of it. In the foreground is the Emeric-Fletcher Valley. 1903. #1:/Yosemite National Park/ggk02084 ID. Gilbert, G.K. 2084 Yosemite National Park, California. East wall of Emeric-Fletcher Valley. The valley was traversed by an ice stream from left to right. 1903. Photos ggk02084 and ggk02085 form a panorama. #1:/Yosemite National Park/ggk02085 ID. Gilbert, G.K. 2085 Yosemite National Park, California. East wall of Emeric-Fletcher Valley. The valley was traversed by an ice stream from left to right. 1903. Photos ggk02084 and ggk02085 form a panorama. #1:/Yosemite National Park/ggk02086 ID. Gilbert, G.K. 2086 Yosemite National Park, California. Mono Pass, viewed from the base of Kuna Crest. At the left of the pass is Mount Gibbs; through the pass, a glimpse of Mono Lake. 1903. Photos ggk02086 and ggk02087 form a panorama. #1:/Yosemite National Park/ggk02087 ID. Gilbert, G.K. 2087 Yosemite National Park, California. Mono Pass, viewed from the base of Kuna Crest. At the left of the pass is Mount Gibbs; through the pass, a glimpse of Mono Lake. 1903. Photos ggk02086 and ggk02087 form a panorama. #1:/Yosemite National Park/ggk02088 ID. Gilbert, G.K. 2088 Yosemite National Park, California. Eastward scarp of the Sierra Nevada. The camera stood on a crest just north of Parker Canyon and was directed southward. 1903. Photos ggk02088 and ggk02089 form a panorama. #1:/Yosemite National Park/ggk02089 ID. Gilbert, G.K. 2089 Yosemite National Park, California. Eastward scarp of the Sierra Nevada. The camera stood on a crest just north of Parker Canyon and was directed southward. 1903. Photos ggk02088 and ggk02089 form a panorama. #1:/Yosemite National Park/ggk02090 ID. Gilbert, G.K. 2090 Yosemite National Park, California. Down the eastern scarp of the Sierra Nevada. The camera stood on a crest just north of Parker Canyon and was directed southeastward and downward. Under the crest is a cirque from which a trough descends the steep slope toward Parker Lake. Beyond the lake is one of the great moraine embankments of the Parker Canyon Glacier. 1903. #1:/Yosemite National Park/ggk02091 ID. Gilbert, G.K. 2091 Yosemite National Park, California. Head of Parker Canyon, viewed from Parker Pass. A faint zigzag line at the right marks the course of a mountain trail. 1903. #1:/Yosemite National Park/ggk02092 ID. Gilbert, G.K. 2092 Yosemite National Park, California. Head of Parker Canyon, viewed from Parker Pass. On the right is the margin of a small glacier under Koip Peak. 1903. #1:/Yosemite National Park/ggk02093 ID. Gilbert, G.K. 2093 Yosemite National Park, California. Head of Parker Canyon and a small glacier. 1903. #1:/Yosemite National Park/ggk02094 ID. Gilbert, G.K. 2094 Yosemite National Park, California. Cirque north of Kuna Peak. Parker Pass in the foreground. 1903. #1:/Yosemite National Park/ggk02095 ID. Gilbert, G.K. 2095 Yosemite National Park, California. Cirques north of Kuna Peak. On the left is a glacier lying between Kuna and Koip Peaks. Photos ggk02095 and ggk02096 form a panorama. #1:/Yosemite National Park/ggk02096 ID. Gilbert, G.K. 2096 Yosemite National Park, California. Cirques north of Kuna and Koip Peaks. The high point on the left is Koip Peak. The more distant high point on the right is probably Kuna Peak. Between them is Kuna Glacier, and on the left of Koip Peak is Koip Glacier. 1903. Photos ggk02095 and ggk02096 form a panorama. #1:/Yosemite National Park/ggk02097 ID. Gilbert, G.K. 2097 Yosemite National Park, California. South part of Kuna Crest. The crest is Viewed from the east across the southern part of Dana Creek Valley. The valley was occupied by a Pleistocene nev‚, from which one glacier flowed to the left down Parker Canyon and another to the right down Dana Creek. Tributary glaciers came from the cirques under Kuna Crest. Within the view are three rock-basin lakes. 1903. #1:/Yosemite National Park/ggk02098 ID. Gilbert, G.K. 2098 Yosemite National Park, California. Lyell Canyon, looking south. The valley of Ireland Creek is partly shown on the right. 1903. #1:/Yosemite National Park/ggk02099 ID. Gilbert, G.K. 2099 Yosemite National Park, California. Lyell Canyon, viewed from a high point at the south. On the east (right), it is bordered by a high shoulder or terrace associated with shallow cirques along Kuna Crest. Mount Conness in the distance on the left. 1903. #1:/Yosemite National Park/ggk02100 ID. Gilbert, G.K. 2100 Yosemite National Park, California. Kuna Creek in Lyell Canyon. Kuna Creek rises in two cirques under Kuna Peak and Koip Peak. After flowing 3 miles in a shallow upland valley, it cascades down the wall of Lyell Canyon. 1903. #1:/Yosemite National Park/ggk02101 ID. Gilbert, G.K. 2101 Yosemite National Park, California. Kuna Peak and Koip Peak, showing cirques in which Kuna Creek heads. The Kuna upland retains a fragment of preglacial topography and so also does the spur between the two cirques. In the middle ground is the east wall of Lyell Canyon. 1903. #1:/Yosemite National Park/ggk02102 ID. Gilbert, G.K. 2102 Yosemite National Park, California. Upper part of Lyell Canyon, which descends from right to left. On the left appears a rock terrace which slopes upstream. 1903. Photos ggk02102 and ggk02103 form a panorama. #1:/Yosemite National Park/ggk02103 ID. Gilbert, G.K. 2103 Yosemite National Park, California. Upper part of Lyell Canyon, which descends from right to left. On the left appears a rock terrace which slopes upstream. 1903. Photos ggk02102 and ggk02103 form a panorama. #1:/Yosemite National Park/ggk02104 ID. Gilbert, G.K. 2104 Yosemite National Park, California. Lyell Glacier, viewed from a point near Donohue Peak. Mount Lyell in the center. Mount Maclure on the right. 1903. #1:/Yosemite National Park/ggk02105 ID. Gilbert, G.K. 2105 Yosemite National Park, California. Lyell Glacier, viewed a spur a quarter of a mile east of the largest lake mapped on the stream flowing from the glacier. The spot was marked by a cairn. 1903. #1:/Yosemite National Park/ggk02106 ID. Gilbert, G.K. 2106 Yosemite National Park, California. Lyell Glacier, viewed from the base and the end of the spur separating Lyell Glacier and Maclure Glacier. August 7, 1903. Photos ggk02106 and ggk02107 form a panorama. #1:/Yosemite National Park/ggk02107 ID. Gilbert, G.K. 2107 Yosemite National Park, California. Lyell Glacier, viewed from the base and the end of the spur separating Lyell Glacier and Maclure Glacier. August 7, 1903. Photos ggk02106 and ggk02107 form a panorama. #1:/Yosemite National Park/ggk02108 ID. Gilbert, G.K. 2108 (General Collection 1806) Yosemite National Park, California. McClure Peak and McClure Glacier, viewed from the north. In the foreground is a rock basin lake. August 7, 1903. #1:/Yosemite National Park/ggk02109 ID. Gilbert, G.K. 2109 Yosemite National Park, California. Mount Maclure and Maclure Glacier, viewed from the north. In the foreground is a rock basin lake. The camera station was marked by a cairn. August 7, 1903. #1:/Yosemite National Park/ggk02110 ID. Gilbert, G.K. 2110 Yosemite National Park, California. McClure Peak and McClure Glacier, viewed from the north. In the foreground is a rock-basin lake. August 7, 1903. #1:/Yosemite National Park/ggk02111 ID. Gilbert, G.K. 2111 Yosemite National Park, California. End of the spur between McClure Glacier and the next cirque north. The rock is massive granite. The terrace and cliff contouring the spur are the results of glacial erosion. In the foreground is a rock-basin lake. Beyond the spur are moraines built by the glacier formerly occupying the cirque. 1903. #1:/Yosemite National Park/ggk02112 ID. Gilbert, G.K. 2112 Yosemite National Park, California. First and second cirques north of McClure Glacier, viewed from the east. 1903. #1:/Yosemite National Park/ggk02113 ID. Gilbert, G.K. 2113 Yosemite National Park, California. First and second cirques north of McClure Glacier, viewed from the east. 1903. #1:/Yosemite National Park/ggk02114 ID. Gilbert, G.K. 2114 Yosemite National Park, California. Plateau west of Lyell Canyon. Kuna Crest appears in the distance. In the foreground is the upper valley of Rafferty Creek. The entire plateau is glaciated, with the exception of a knob on the right. 1903. Photos ggk02114 and ggk02115 form a panorama. #1:/Yosemite National Park/ggk02115 ID. Gilbert, G.K. 2115 Yosemite National Park, California. Plateau west of Lyell Canyon. Kuna Crest appears in the distance. In the foreground is the upper valley of Rafferty Creek. The entire plateau is glaciated, with the exception of a knob on the right. 1903. Photos ggk02114 and ggk02115 form a panorama. #1:/Yosemite National Park/ggk02116 ID. Gilbert, G.K. 2116 Yosemite National Park, California. Plateau west of Lyell Canyon, viewed from near Ireland Creek. On the right is Lyell Canyon; in the middle distance, Mount Conness; on the left, the summit ridge of the plateau. The bush-like trees in the foreground are Pinus albicaulis. 1903. Photos ggk02116 and ggk02117 form a panorama. #1:/Yosemite National Park/ggk02117 ID. Gilbert, G.K. 2117 Yosemite National Park, California. Plateau west of Lyell Canyon, viewed from near Ireland Creek. On the right is Lyell Canyon; in the middle distance, Mount Conness; on the left, the summit ridge of the plateau. The bush-like trees in the foreground are Pinus albicaulis. 1903. Photos ggk02116 and ggk02117 form a panorama. #1:/Yosemite National Park/ggk02118 ID. Gilbert, G.K. 2118 Yosemite National Park, California. Cirque and lake on the east side of Kuna Crest. 1903. #1:/Yosemite National Park/ggk02119 ID. Gilbert, G.K. 2119 Yosemite National Park, California. Empty cirque on the shady northeast side of Kuna Crest. Deep amphitheater hollows of this kind were sources of the ancient Sierra glaciers. Originally sharp-cut valley heads, they have been enlarged to their present capacious forms by the excavating action peculiar to the glaciers. Most of them have rock-rimmed lake basins in their floors. 1903. Plate 28-A, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/ggk02120 ID. Gilbert, G.K. 2120 Yosemite National Park, California. Mount Dana on the right and the north- south valley passing its western base. 1903. Photos ggk02120, ggk02121, ggk02122, ggk02123, ggk02124, ggk02125, ggk02126, ggk02127, ggk02128, and ggk02129 form a panorama. #1:/Yosemite National Park/ggk02121 ID. Gilbert, G.K. 2121 (General Collection 2001) Yosemite National Park, California. Mount Dana on the left. Mount Gibbs on the right. Between them, the hanging valley overlooking the north-south trough which contains Dana Creek. 1903. Photos ggk02120, ggk02121, ggk02122, ggk02123, ggk02124, ggk02125, ggk02126, ggk02127, ggk02128, and ggk02129 form a panorama. #1:/Yosemite National Park/ggk02122 ID. Gilbert, G.K. 2122 Yosemite National Park, California. Up South Fork Dana Creek. On the left at the head of the valley are Parker Pass and Mono Pass. The Kuna-Koip mass forms the sky line near the middle. 1903. Photos ggk02120, ggk02121, ggk02122, ggk02123, ggk02124, ggk02125, ggk02126, ggk02127, ggk02128, and ggk02129 form a panorama. #1:/Yosemite National Park/ggk02123 ID. Gilbert, G.K. 2123 Yosemite National Park, California. North end of Kuna Creek. 1903. Photos ggk02120, ggk02121, ggk02122, ggk02123, ggk02124, ggk02125, ggk02126, ggk02127, ggk02128, and ggk02129 form a panorama. #1:/Yosemite National Park/ggk02124 ID. Gilbert, G.K. 2124 Yosemite National Park, California. At right of center is the valley of Rafferty Creek. Central and toward the left is the plateau between Rafferty Creek and Lyell Canyon. On this plateau on the left is the shallow valley of Ireland Creek. 1903. Photos ggk02120, ggk02121, ggk02122, ggk02123, ggk02124, ggk02125, ggk02126, ggk02127, ggk02128, and ggk02129 form a panorama. #1:/Yosemite National Park/ggk02125 ID. Gilbert, G.K. 2125 Yosemite National Park, California. On the right Moraine Flat; beyond it, Tuolumne Meadows. In the distance on the left and in center is the upland mass culminating in Unicorn Peak and Cathedral Peak. On the right Hoffmann Crest. 1903. Photos ggk02120, ggk02121, ggk02122, ggk02123, ggk02124, ggk02125, ggk02126, ggk02127, ggk02128, and ggk02129 form a panorama. #1:/Yosemite National Park/ggk02126 ID. Gilbert, G.K. 2126 Yosemite National Park, California. Moraine Flat. 1903. Photos ggk02120, ggk02121, ggk02122, ggk02123, ggk02124, ggk02125, ggk02126, ggk02127, ggk02128, and ggk02129 form a panorama. #1:/Yosemite National Park/ggk02127 ID. Gilbert, G.K. 2127 Yosemite National Park, California. North part of Moraine Flat and slopes of White Mountain. 1903. Photos ggk02120, ggk02121, ggk02122, ggk02123, ggk02124, ggk02125, ggk02126, ggk02127, ggk02128, and ggk02129 form a panorama. #1:/Yosemite National Park/ggk02128 ID. Gilbert, G.K. 2128 Yosemite National Park, California. White Mountain. 1903. Photos ggk02120, ggk02121, ggk02122, ggk02123, ggk02124, ggk02125, ggk02126, ggk02127, ggk02128, and ggk02129 form a panorama. #1:/Yosemite National Park/ggk02129 ID. Gilbert, G.K. 2129 Yosemite National Park, California. Ridge between Moraine Flat and the Tioga Lake trough. 1903. Photos ggk02120, ggk02121, ggk02122, ggk02123, ggk02124, ggk02125, ggk02126, ggk02127, ggk02128, and ggk02129 form a panorama. #1:/Yosemite National Park/ggk02130 ID. Gilbert, G.K. 2130 Yosemite National Park, California. Terrace of the Conness Basin, viewed from a point three-quarters of a mile northwest of Ragged Peak. The western face of Mount Conness on the right. Sheep Peak in the center. 1903. #1:/Yosemite National Park/ggk02131 ID. Gilbert, G.K. 2131 Yosemite National Park, California. North wall of Tuolumne Canyon at its head on the left. Mount Conness in the distance on the right. Sheep Mountain near the middle. About the bases of the mountains are remnants of the plain from which the numerous domes or knobs have been carved. View is from a peak west of McGee Lake. 1903. Photos ggk02131, ggk02132, and ggk02133 form a panorama. #1:/Yosemite National Park/ggk02132 ID. Gilbert, G.K. 2132 Yosemite National Park, California. The sky line includes Mount Conness on the left and Mount Dana and Mount Gibbs on the right. To the right of Mount Conness, and nearer than the sky line, is Ragged Peak. The terrace system of the Conness Basin is traced about the base of Ragged Peak and seen to merge with Moraine Flat, the timbered region on the right. View is from a peak west of McGee Lake. 1903. Photos ggk02131, ggk02132, and ggk02133 form a panorama. #1:/Yosemite National Park/ggk02133 ID. Gilbert, G.K. 2133 Yosemite National Park, California. The conical mass against the sky on the left is Mount Dana. Kuna Crest makes the sky line from middle to right. The timbered region on the left is Moraine Flat. The hollow at its right limit contains Tuolumne Meadows, and beyond the meadows is the higher plateau which lies west of Lyell Canyon. The foreground is a region of domes and knobs among which the course of Tuolumne River is betrayed by points of white, as it flows from the foot of the meadows to the lower left corner. View is from a peak west of McGee Lake. 1903. Photos ggk02131, ggk02132, and ggk02133 form a panorama. #1:/Yosemite National Park/ggk02134 ID. Gilbert, G.K. 2134 Yosemite National Park, California. Plateau north of Tuolumne Canyon, viewed from a hill 1 mile north of Lake Tenaya. 1903. #1:/Yosemite National Park/ggk02135 ID. Gilbert, G.K. 2135 Yosemite National Park, California. Tuolumne Meadows, viewed from a dome at the west. Other domes appear in the foreground. 1903. #1:/Yosemite National Park/ggk02136 ID. Gilbert, G.K. 2136 Yosemite National Park, California. Moraine Flat, viewed from a dome at the west. The view is nearly continuous with photo ggk02135. The conical peak at the right of center is Mount Dana. In middle ground is Round Meadow, traversed by the Tuolumne River; beyond it, Lambert Dome. 1903. #1:/Yosemite National Park/ggk02137 ID. Gilbert, G.K. 2137 Yosemite National Park, California. Domes and knobs of the Tuolumne Basin, looking north-northwest from one of the domes. On the right is a portion of Round Meadow with the Tuolumne River. 1903. #1:/Yosemite National Park/ggk02138 ID. Gilbert, G.K. 2138 Yosemite National Park, California. Domes and knobs of the Tuolumne Basin, looking northwest from one of the domes. 1903. #1:/Yosemite National Park/ggk02139 ID. Gilbert, G.K. 2139 Yosemite National Park, California. Tuolumne Canyon. The view is northwest and downstream. The camera stands on glaciated rock above an abrupt descent. In middle ground is the sill of a second leap; just beyond it on the right, the tributary canyon of Return Creek. 1903. #1:/Yosemite National Park/ggk02140 ID. Gilbert, G.K. 2140 Yosemite National Park, California. Tuolumne Canyon, looking eastward and upstream. The farther cliff on the right is at the head of the canyon. 1903. #1:/Yosemite National Park/ggk02141 ID. Gilbert, G.K. 2141 Yosemite National Park, California. North wall of Tuolumne Canyon. Wildcat Point is shown against the sky. Below it and extending to the left is a terrace of the upland. 1903. #1:/Yosemite National Park/ggk02142 ID. Gilbert, G.K. 2142 Yosemite National Park, California. Down Tuolumne Canyon, viewed from a point opposite the mouth of Return Creek. 1903. #1:/Yosemite National Park/ggk02143 ID. Gilbert, G.K. 2143 Yosemite National Park, California. Eastward from the summit of Mount Conness. On the left is the head of Conness Glacier. The cliff above it is contrasted with a remnant of preglacial topography. 1903. #1:/Yosemite National Park/ggk02144 ID. Gilbert, G.K. 2144 Yosemite National Park, California. Northward from Mount Conness. The nearer crest is the divide between Mill Creek, a tributary of Mono Lake, and Conness Creek, a tributary of the Tuolumne River. A remnant of old topography surface with gentle slopes is surrounded by steeper slopes of glacial origin. 1903. #1:/Yosemite National Park/ggk02145 ID. Gilbert, G.K. 2145 Yosemite National Park, California. North face of a spur running southwest from White Mountain, viewed from the trail ascending Mount Conness. At the extreme right is Ragged Peak. 1903. #1:/Yosemite National Park/ggk02146 ID. Gilbert, G.K. 2146 Yosemite National Park, California. Ragged Peak and associated spur, viewed from the northeast. 1903. #1:/Yosemite National Park/ggk02147 ID. Gilbert, G.K. 2147 Yosemite National Park, California. Sunrise Mountain, viewed from Clouds Rest. The timbered plateau called Sunrise Mountain is a remnant of an upland plain. 1903. #1:/Yosemite National Park/ggk02148 ID. Gilbert, G.K. 2148 Yosemite National Park, California. Up Merced Canyon, viewed from the wall of Little Yosemite Valley. A terrace of bare granite appears in the center and a remnant of the same on the left. The high spurs on the left are remnants of a higher terrace. 1903. #1:/Yosemite National Park/ggk02149 ID. Gilbert, G.K. 2149 Yosemite National Park, California. South wall of Little Yosemite Valley near its head. The cliff illustrates the so-called dome structure. The plain at the top is a remnant of a terrace intermediate in height between the two shown in photo ggk02148. The distant peak is Mount Clarke. 1903. #1:/Yosemite National Park/ggk02150 ID. Gilbert, G.K. 2150 Yosemite National Park, California. Part of the south wall of Little Yosemite Valley, showing two truncated spurs. The tops of these spurs are remnants of a terrace intermediate in height between those shown in photo ggk02148. 1903. #1:/Yosemite National Park/ggk02151 ID. Gilbert, G.K. 2151 Yosemite National Park, California. North side of Merced Valley, viewed from a promontory overlooking Little Yosemite Valley. The nearly horizontal line is a heavy moraine, which serves as a dam to divert the course of Sunrise Creek. 1903. #1:/Yosemite National Park/ggk02152 ID. Gilbert, G.K. 2152 Yosemite National Park, California. Nevada Fall at the head of Yosemite Valley. 1903. Overlaps photo ggk02153. #1:/Yosemite National Park/ggk02153 ID. Gilbert, G.K. 2153 Yosemite National Park, California. Narrow cleft between Liberty Cap on the right and Mount Broderick. 1903. #1:/Yosemite National Park/ggk02154 ID. Gilbert, G.K. 2154 Yosemite National Park, California. Half Dome, viewed from Yosemite Valley. 1903. #1:/Yosemite National Park/ggk02155 ID. Gilbert, G.K. 2155 Yosemite National Park, California. Domes at the west end of Tuolumne Meadows, viewed from the mouth of Budd Creek. 1903. #1:/Yosemite National Park/ggk02156 ID. Gilbert, G.K. 2156 Yosemite National Park, California. Fairview and other domes of the Sierra Nevada, viewed from Tuolumne Meadows at the mouth of Budd Creek. 1903. #1:/Yosemite National Park/ggk02157 ID. Gilbert, G.K. 2157 Yosemite National Park, California. Fairview Dome, viewed from the southwest. Lembert Dome on the right. 1903. #1:/Yosemite National Park/ggk02158 ID. Gilbert, G.K. 2158 Yosemite National Park, California. Fairview Dome, viewed from the south. 1903. #1:/Yosemite National Park/ggk02159 ID. Gilbert, G.K. 2159 Yosemite National Park, California. Fairview Dome, viewed from the north. Beyond and on the right is Cathedral Peak. 1903. #1:/Yosemite National Park/ggk02160 ID. Gilbert, G.K. 2160 Yosemite National Park, California. Cathedral Peak and granite domes, viewed from the trail near Ragged Peak. The highest dome is Fairview. 1903. #1:/Yosemite National Park/ggk02161 ID. Gilbert, G.K. 2161 Yosemite National Park, California. Dome structure in the northwest wall of Emeric Valley. 1903. #1:/Yosemite National Park/ggk02162 ID. Gilbert, G.K. 2162 Yosemite National Park, California. Domes near Cathedral Lake, viewed from the northeast. 1903. #1:/Yosemite National Park/ggk02163 ID. Gilbert, G.K. 2163 Yosemite National Park, California. Domes west of Tuolumne Meadows. Hoffman Crest on the right. 1903. #1:/Yosemite National Park/ggk02164 ID. Gilbert, G.K. 2164 Yosemite National Park, California. Chief summit of Lembert Dome, viewed from a lower summit at the northeast. Tuolumne Meadows and Cathedral Peak in the distance. 1903. #1:/Yosemite National Park/ggk02165 ID. Gilbert, G.K. 2165 Yosemite National Park, California. Summit of Lembert Dome. 1903. #1:/Yosemite National Park/ggk02166 ID. Gilbert, G.K. 2166 Yosemite National Park, California. Dome 1 mile north of Cathedral Lake. 1903. #1:/Yosemite National Park/ggk02167 ID. Gilbert, G.K. 2167 Yosemite National Park, California. Domes and knobs around Cathedral Peak, viewed from a hill west of McGee Lake. 1903. #1:/Yosemite National Park/ggk02168 ID. Gilbert, G.K. 2168 Yosemite National Park, California. Dissected dome on the west side of Rafferty Creek. 1903. #1:/Yosemite National Park/ggk02169 ID. Gilbert, G.K. 2169 Yosemite National Park, California. Dome structure on the northeastern slope of Clouds Rest. 1903. #1:/Yosemite National Park/ggk02170 ID. Gilbert, G.K. 2170 Yosemite National Park, California. Dome and dome structure on the west side of Emeric Creek near Merced Canyon. 1903. Compare with photo ggk02171. #1:/Yosemite National Park/ggk02171 ID. Gilbert, G.K. 2171 Yosemite National Park, California. Dome and dome structure on the west side of Emeric Creek near Merced Canyon. 1903. Compare with photo ggk02170. #1:/Yosemite National Park/ggk02172 ID. Gilbert, G.K. 2172 Yosemite National Park, California. Northwest face of Vogelsang Peak. 1903. #1:/Yosemite National Park/ggk02173 ID. Gilbert, G.K. 2173 Yosemite National Park, California. Dome structure in the northwest wall of Emeric-Fletcher Valley. 1903. #1:/Yosemite National Park/ggk02174 ID. Gilbert, G.K. 2174 Yosemite National Park, California. Dome structure in the northwest wall of Emeric-Fletcher Valley. 1903. #1:/Yosemite National Park/ggk02175 ID. Gilbert, G.K. 2175 Yosemite National Park, California. Dome structure in the northwest wall of Emeric-Fletcher Valley. 1903. #1:/Yosemite National Park/ggk02176 ID. Gilbert, G.K. 2176 Yosemite National Park, California. Dome structure in the northwest wall of Emeric-Fletcher Valley. 1903. #1:/Yosemite National Park/ggk02177 ID. Gilbert, G.K. 2177 Yosemite National Park, California. Emeric Dome, viewed from the north across Emeric Lake. The ridge extending northeastward from the dome shows anticlinal joints. 1903. #1:/Yosemite National Park/ggk02178 ID. Gilbert, G.K. 2178 Yosemite National Park, California. Emeric Dome and Emeric Lake, viewed from the north. 1903. #1:/Yosemite National Park/ggk02179 ID. Gilbert, G.K. 2179 Yosemite National Park, California. Northwest face of Emeric Dome. 1903. #1:/Yosemite National Park/ggk02180 ID. Gilbert, G.K. 2180 Yosemite National Park, California. Synclinal dome structure at the outlet of Emeric Lake. 1903. #1:/Yosemite National Park/ggk02181 ID. Gilbert, G.K. 2181 Yosemite National Park, California. Fletcher Creek below Emeric Dome. The dome structure conforms to the surface. Fletcher Creek, descending a pitching syncline, is joined from the right by Emeric Creek, descending another snycline. 1903. #1:/Yosemite National Park/ggk02182 ID. Gilbert, G.K. 2182 (General Collection 805) Yosemite National Park, California. Junction of Emeric Creek and Fletcher Creek. Southwest end of Emeric Dome, lying between Emeric Valley (left) and Fletcher Valley (right). 1903. Photos ggk02182, ggk02183, ggk02184, and ggk02185 form a panorama. #1:/Yosemite National Park/ggk02183 ID. Gilbert, G.K. 2183 Yosemite National Park, California. Junction of Emeric Creek and Fletcher Creek. Fletcher Creek descends a pitching syncline of dome structure. 1903. Photos ggk02182, ggk02183, ggk02184, and ggk02185 form a panorama. #1:/Yosemite National Park/ggk02184 ID. Gilbert, G.K. 2184 Yosemite National Park, California. Junction of Emeric Creek and Fletcher Creek. The valley wall exhibits dome structure. 1903. Photos ggk02182, ggk02183, ggk02184, and ggk02185 form a panorama. #1:/Yosemite National Park/ggk02185 ID. Gilbert, G.K. 2185 Yosemite National Park, California. Junction of Emeric Creek and Fletcher Creek. Down Fletcher or Emeric Creek, to the Merced Canyon, beyond which rises the Clarke group of peaks. Mount Clark on the right. 1903. Photos ggk02182, ggk02183, ggk02184, and ggk02185 form a panorama. #1:/Yosemite National Park/ggk02186 ID. Gilbert, G.K. 2186 Yosemite National Park, California. Southward from the south base of Mount Hoffman. On the left is Clouds Rest, overlooking Tenaya Canyon; on the right, Half Dome; and beyond it, the smoke of a forest fire. 1903. Photos ggk02186 and ggk02187 form a panorama. #1:/Yosemite National Park/ggk02187 ID. Gilbert, G.K. 2187 Yosemite National Park, California. Uplands bordering Yosemite Valley, viewed from the south base of Mount Hoffman. Half Dome on the extreme left. 1903. Photos ggk02186 and ggk02187 form a panorama. #1:/Yosemite National Park/ggk02188 ID. Gilbert, G.K. 2188 Yosemite National Park, California. East from the south base of Mount Hoffman. Tenaya Lake on the left and Cathedral Peak beyond it. 1903. #1:/Yosemite National Park/ggk02189 ID. Gilbert, G.K. 2189 Yosemite National Park, California. Cliff southeast of Tenaya Lake. 1903. #1:/Yosemite National Park/ggk02190 ID. Gilbert, G.K. 2190 Yosemite National Park, California. Cliff north of Tenaya Lake, illustrating dome structure. 1903. #1:/Yosemite National Park/ggk02191 ID. Gilbert, G.K. 2191 Yosemite National Park, California. Cliff east of Tenaya Lake, overlooking Tenaya Canyon. 1903. #1:/Yosemite National Park/ggk02192 ID. Gilbert, G.K. 2192 Yosemite National Park, California. Cliff east of Tenaya Lake, overlooking Tenaya Canyon, showing dome structure. 1903. #1:/Yosemite National Park/ggk02193 ID. Gilbert, G.K. 2193 Yosemite National Park, California. Cliff east of Tenaya Lake, overlooking Tenaya Canyon, showing dome structure. 1903. #1:/Yosemite National Park/ggk02194 ID. Gilbert, G.K. 2194 Yosemite National Park, California. Granite slope southeast of Tenaya Canyon, showing dome structure with synclinal curvature. Cathedral Creek in the foreground. 1903. #1:/Yosemite National Park/ggk02195 ID. Gilbert, G.K. 2195 Yosemite National Park, California. Terraces around the west and south bases of Sheep Peak, viewed from the corresponding terrace south of Conness Creek. 1903. #1:/Yosemite National Park/ggk02196 ID. Gilbert, G.K. 2196 Yosemite National Park, California. Terraces south of Sheep Peak and west of Mount Conness, viewed from the corresponding terrace south of Conness Creek. 1903. #1:/Yosemite National Park/ggk02197 ID. Gilbert, G.K. 2197 Yosemite National Park, California. Southwest spur of Mount Conness, showing dome structure. 1903. #1:/Yosemite National Park/ggk02198 ID. Gilbert, G.K. 2198 Yosemite National Park, California. Spur between White Mountain and Ragged Peak, viewed from Mount Conness. In the distance the rounded summit on the left is the Kuna-Koip mass. Near it and beyond is the Ritter mass, Mount Ritter appearing as the highest point and Banner Peak as a sharp point near-by. Nearer the middle, Mount Lyell is the highest point of the skyline, and the next point on the right is McClure Peak. Circa 1903. Photos ggk02198 and ggk02199. #1:/Yosemite National Park/ggk02199 ID. Gilbert, G.K. 2199 Yosemite National Park, California. Spur between White Mountain and Ragged Peak, viewed from Mount Conness. The most distant points against the sky are peaks of the Galen Clarke group. Other distant summits belong chiefly to the mountain mass between Tuolumne Pass and Tenaya Canyon. The Tenaya Gap appears on the extreme left. Circa 1903. Photos ggk02198 and ggko2199 form a panorama. #1:/Yosemite National Park/ggk02200 ID. Gilbert, G.K. 2200 Yosemite National Park, California. Dome structure in the ridge northeast of Ragged Mountain. Circa 1903. #1:/Yosemite National Park/ggk02201 ID. Gilbert, G.K. 2201 Yosemite National Park, California. North side of Ragged Mountain. Two sets of joints are separated by a master joint or fault. The one on the left includes fractures ending in the fault. Circa 1903. #1:/Yosemite National Park/ggk02202 ID. Gilbert, G.K. 2202 Yosemite National Park, California. West slope of upper Cathedral Lake. The dome structure in the granite shows synclinal curvature. Above is a comb between cirques. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk02203 ID. Gilbert, G.K. 2203 Fault exposed in quarry near den Echo, Maryland. The flat rock face above the hat is a joint face exposed in quarrying. This joint was faulted by movement along an intersecting plane, shown at left of the hat. Compare with no. 2204. Montgomery County, 1903 #1:/Gilbert1903-Gilbert G.K. Collection/ggk02204 ID. Gilbert, G.K. 2204 Joint face and thin quartz vein exposed in quarry near den Echo, Maryland. This face appears in no. 2203, at the left of the hat. Montgomery County. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk02205 ID. Gilbert, G.K. 2205 Joints and faults exposed in quarry near Glen Echo, Maryland. Montgomery County. 1903 #1:/Gilbert1903-Gilbert G.K. Collection/ggk02206 ID. Gilbert, G.K. 2206 Joints and faults exposed in quarry near Glen Echo, Montgomery County, Maryland. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk02207 ID. Gilbert, G.K. 2207 Joints and faults exposed in quarry near Glen Echo, Montgomery County, Maryland. At the intersection of faults are curved surfaces. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk02208 ID. Gilbert, G.K. 2208 Joints and faults exposed in quarry near Glen Echo, Montgomery County, Maryland. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk02209 ID. Gilbert, G.K. 2209 Intersecting faults exposed in quarry near Glen Echo, Montgomery County, Maryland. Along some of the intersections curved surfaces are developed. In the center of the view are two vertical faults intersecting each other at a small angle. 1903 #1:/Gilbert1903-Gilbert G.K. Collection/ggk02210 ID. Gilbert, G.K. 2210 Intersection of fault planes exposed in quarry near Glen Echo, Montgomery County, Maryland. 1903. #1:/Gilbert1903-Gilbert G.K. Collection/ggk02211 ID. Gilbert, G.K. 2211 Intersecting joints of many systems; quarry near Glen Echo, Montgomery County, Maryland. 1903 #1:/Gilbertnd-Gilbert G.K. Collection/ggk02212 ID. Gilbert, G.K. 2212 Intersecting joints of many systems; quarry near Glen Echo, Montgomery County, Maryland. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02213 ID. Gilbert, G.K. 2213 Stone Mountain, from the west; Stone Mountain Village in foreground, with station of Georgia Railway at right. Dekalb County, Georgia, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02214 ID. Gilbert, G.K. 2214 Stone Mountain, from the west-southwest. Dekalb County, Georgia.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02215 ID. Gilbert, G.K. 2215 Stone Mountain, from the south. Dekalb County, Georgia.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02216 ID. Gilbert, G.K. 2216 Stone Mountain, from the south-southeast. Dekalb County, Georgia.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02217 ID. Gilbert, G.K. 2217 Stone Mountain, from a little south of east. Dekalb County, Georgia.n.d #1:/Gilbertnd-Gilbert G.K. Collection/ggk02218 ID. Gilbert, G.K. 2218 Stone Mountain, from the northeast. Dekalb County, Georgia.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02219 ID. Gilbert, G.K. 2219 Stone Mountain, looking southeast along the northeast face. Dekalb County. Georgia, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02220 ID. Gilbert, G.K. 2220 Stone Mountain, looking southeast along the northeast face. Dekalb County, Georgia, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02221 ID. Gilbert, G.K. 2221 Rock Chapel Hill. 3 miles east-northeast from Lithonia. View from near Rock Chapel. Dekalb County, Georgia, n.d #1:/Gilbertnd-Gilbert G.K. Collection/ggk02222 ID. Gilbert, G.K. 2222 Pine Mountain, one mile east of Lithonia. View from Collinsville quarry. Dekalb County, Georgia, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02223 ID. Gilbert, G.K. 2223 East slope of Pine Mountain near Lithonia. The absence of soil and vegetation is incidental to the absence of joints. Dekalb County, Georgia. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02224 ID. Gilbert, G.K. 2224 South(?) slope of Mt. Arabia, 3 miles southwest of Lithonia. The absence of soil and vegetation is incidental to the absence of joints. Dekalb County, Georgia, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02225 ID. Gilbert, G.K. 2225 Approximately level surface of granite-gneiss near Mt. Arabia, 3 miles southwest of Lithonia, Much of the surface is bare, the absence of soil being related to the absence of joints, Dekalb County, Georgia.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02226 ID. Gilbert, G.K. 2226 Quarry face, Collinsville quarries, Lithonia. At right of the quarry face is the original surface of the rock-granite-gneiss; at left is a smoother surface due to a parting developed by the shock of blasting, but predetermined by rock conditions. Dekalb County, Georgia.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02227 ID. Gilbert, G.K. 2227 Quarry face, Mt. Arabia quarries, 3 miles southwest of Lithonia. Above the quarry face is the original surface of the rock-granite-gneiss; below is a smoother surface due to a parting developed by the shock of blasting, but predetermined by rock conditions. Dekalb County, Georgia.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02228 ID. Gilbert, G.K. 2228 Anticline produced by the bursting of a thin layer of granite-gneiss on the slope of Rock Chapel Hill, near Lithonia. Width of arch 14 feet; height 9 inches. Dekalb County, Georgia, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02229 ID. Gilbert, G.K. 2229 Anticline formed by the bursting of a thin layer of granite-gneiss on the slope of Mt. Arabia, near Lithonia. The anticline is one of a series recently formed, probably in connection with jar from blasting. It is supposed that previous to the jar the layer was in condition of strain. Dekalb County, Georgia.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02230 ID. Gilbert, G.K. 2230 Face of granite-gneiss, Collinsville quarries, Lithonia, Dekalb County, Georgia.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02231 ID. Gilbert, G.K. 2231 Face of granite-gneiss, Collinsville quarries, Lithonia, Dekalb County, Georgia.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02232 ID. Gilbert, G.K. 2232 Niobrara limestone near Thatcher. Illustrates rhythmic alternation of limestone and shale. Las Animas County, Colorado.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02233 ID. Gilbert, G.K. 2233 Upper portion of Dakota sandstone, canyon of Apishapa River, above main fork. Las Animas County, Colorado.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02234 ID. Gilbert, G.K. 2234 Upper portion of Dakota sandstone near head of Apishapa Canyon, Las Animas County, Colorado, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02235 ID. Gilbert, G.K. 2235 Upper portion of Dakota sandstone near head of Apishapa Canyon, Las Animas County, Colorado, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02236 ID. Gilbert, G.K. 2236 Across The Solitario, from lava top on north side, Terlingua quadrangle, Presidio and Brewster Counties, Texas.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02237 ID. Gilbert, G.K. 2237 South part of The Solitario, from the west, Terlingua quadrangle, Presidio County, Texas.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02238 ID. Gilbert, G.K. 2238 West rim of The Solitario. The rock is Cretaceous limestone. Terlingua quadrangle, Presidio County, Texas, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02239 ID. Gilbert, G.K. 2239 Caves in Cretaceous limestone; seen from same station as no. 2238. Presidio County, Texas.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02240 ID. Gilbert, G.K. 2240 Thrust fault on west flank of The Solitario. The rocks are Cretaceous. A limestone is thrust over a shale of later age. Compare with no. 2241. Terlingua quadrangle, Presidio County, Texas.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02241 ID. Gilbert, G.K. 2241 Thrust fault on west flank of The Solitario. The rocks are Cretaceous. A limestone is thrust over a shale of later age. Compare with no. 2240. Terlingua quadrangle, Presidio County, Texas.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02242 ID. Gilbert, G.K. 2242 Fault and shear zone in Cretaceous rocks west of The Solitario. The uplifted block is at right, showing limestone below and shale above. The vertical face of limestone is a fault cliff exposed by erosion. Terlingua quadrangle, Presidio County, Texas.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02243 ID. Gilbert, G.K. 2243 Basaltic mesa north of The Solitario. In the foreground at right is limestone dipping away from The Solitario. Presidio and Brewster Counties, Texas.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02244 ID. Gilbert, G.K. 2244 Cliff developed by erosion from volcanic beds northeast of The Solitario. The plain of the foreground has a lava bed as foundation. The steep part of cliff is of tuff; the capping of lava beds. Brewster County, Texas.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02245 ID. Gilbert, G.K. 2245 Salient of volcanic mesa northeast of The Solitario. Brewster County, Texas.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02246 ID. Gilbert, G.K. 2246 San Jacinto Butte, 20 miles south of Marfa. The rock is igneous, and the chief occurrence is as a volcanic plug. Presidio County, Texas.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02247 ID. Gilbert, G.K. 2247 Windmills and reservoir about 20 miles south of Marfa, Presidio County, Texas.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02248 ID. Gilbert, G.K. 2248 Mirage. Seen about noon near Marfa, Presidio County, Texas, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02249 ID. Gilbert, G.K. 2249 Mirage. Seen about noon near Marfa, Presidio County, Texas, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02250 ID. Gilbert, G.K. 2250 Entrance to burrow of prairie dog near Thatcher, Las Animas County, Colorado.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02251 ID. Gilbert, G.K. 2251 Ant hill near Thatcher, Las Animas County, Colorado, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02252 ID. Gilbert, G.K. 2252 Basaltic dike 15 miles south of Marfa. The dike is in two parts, separated by offset. One part appears in foreground, the other in middle distance. Compare with no. 2253. Presidio County, Texas.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02253 ID. Gilbert, G.K. 2253 Side of basaltic dike about 15 miles south of Marfa. Compare with no. 2252. Presidio County, Texas.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02254 ID. Gilbert, G.K. 2254 Fouquieria splendens (Ocatilla), Terlingua quadrangle, Texas.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02255 ID. Gilbert, G.K. 2255 Opuntia 30 miles south of Marfa, Presidio County, Texas, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02256 ID. Gilbert, G.K. 2256 Hackberry 30 miles south of Marfa, Presidio County, Texas.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02257 ID. Gilbert, G.K. 2257 Dasylirion, The Solitario, Terlingua quadrangle, Texas.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02258 ID. Gilbert, G.K. 2258 Polemonium, summit of Mt. Goddard, Sierra Nevada, Fresno County, California. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02259 ID. Gilbert, G.K. 2259 Dodecatheon (shooting star), Beasore Meadows. Sierra Nevada, Madera County, California. 1904 #1:/Gilbert1904-Gilbert G.K. Collection/ggk02260 ID. Gilbert, G.K. 2260 Azalea California, California Mill (near big trees), Sierra Nevada, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02261 ID. Gilbert, G.K. 2261 Sequoia gigantea. east of Burton Pass (6,500 feet), Sierra Nevada, Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02262 ID. Gilbert, G.K. 2262 Top of a giant Sequoia near California Mill, Sierra Nevada, California. Tulane County. 1904 #1:/Gilbert1904-Gilbert G.K. Collection/ggk02263 ID. Gilbert, G.K. 2263 Abies magnifica showing characteristic habit of top, Buck Peak, overlooking Paradise Valley, Sierra Nevada, Fresno County, California. 1904 #1:/Gilbert1904-Gilbert G.K. Collection/ggk02264 ID. Gilbert, G.K. 2264 Pinus lambertiana (sugar pine) east of Burton Pass, Sierra Nevada, Fresno County, California. 1904 #1:/Gilbert1904-Gilbert G.K. Collection/ggk02265 ID. Gilbert, G.K. 2265 Pinus balfouriana (10,500 feet). head of Sugarloaf Creek, Sierra Nevada, Tulare County, California. 1904 #1:/Gilbert1904-Gilbert G.K. Collection/ggk02266 ID. Gilbert, G.K. 2266 Aspen, showing bear tracks, near mouth of Bear Creek, San Joaquin Basin, Sierra Nevada, Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02267 ID. Gilbert, G.K. 2267 Aspen, showing bear tracks, near mouth of Bear Creek. San Joaquin Basin, Sierra Nevada, Fresno County, California. 1904 #1:/Gilbert1904-Gilbert G.K. Collection/ggk02268 ID. Gilbert, G.K. 2268 Aspen, showing bear tracks, near mouth of Bear Creek, San Joaquin Basin, Sierra Nevada, Fresno County, California. 1904 #1:/Gilbert1904-Gilbert G.K. Collection/ggk02269 ID. Gilbert, G.K. 2269 Aspen, showing bear tracks, near mouth of Bear Creek, San Joaquin Basin, Sierra Nevada, Fresno County, California. 1904 #1:/Gilbert1904-Gilbert G.K. Collection/ggk02270 ID. Gilbert, G.K. 2270 Aboriginal mill near Mono Creek. The surface of a flat granite boulder flush with the ground has eight hollows, apparently mortars, and about them lie rude pestles. The whole is surrounded by a brush hedge. Altitude 7,700 feet. The surrounding forests consist chiefly of Murray pine and Jeffrey pine; there are also junipers, but no oaks nor Digger pines. San Joaquin Basin, Sierra Nevada, Fresno County, California. 1904 #1:/Gilbert1904-Gilbert G.K. Collection/ggk02271 ID. Gilbert, G.K. 2271 Joint in granite widened by growth of root. Tree is an upland juniper. Sierra Nevada, Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02272 ID. Gilbert, G.K. 2272 Ice rampart on the shore of Evolution Lake, Sierra Nevada, Fresno County, California. 1904 #1:/Gilbert1904-Gilbert G.K. Collection/ggk02273 ID. Gilbert, G.K. 2273 Granite with inclusions of diorite (?), northeast of Mt. Silliman. Shows the ordinary distribution of the inclusions. Compare with no. 2274, etc. Sierra Nevada, Tulare County, California. 1904 #1:/Gilbert1904-Gilbert G.K. Collection/ggk02274 ID. Gilbert, G.K. 2274 (General Collection 2302) Granite with inclusions of diorite (?), Kings Canyon, Sierra Nevada. The inclusions, elsewhere dispersed through the granite, are here aggregated. They do not touch one another, but are separated by narrow bands of the matrix. In some cases they indent one another. Compare with preceding and following views. Fresno County, California. 1904 #1:/Gilbert1904-Gilbert G.K. Collection/ggk02275 ID. Gilbert, G.K. 2275 Granite inclusions of diorite (?), 3 miles northeast of Mt. Silliman, Sierra Nevada, Fresno County, California. 1904 #1:/Gilbert1904-Gilbert G.K. Collection/ggk02276 ID. Gilbert, G.K. 2276 Granite with inclusions of diorite (?), Dougherty Creek, north of Granite Pass, Sierra Nevada. The tape line is 3 feet long. Compare with preceding and following views. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02277 ID. Gilbert, G.K. 2277 Granite with inclusions of diorite (?), Dougherty Creek, north of Granite Pass, Sierra Nevada. The tape line is 3 feet long. Compare preceding and following views, Fresno County. California. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02278 ID. Gilbert, G.K. 2278 Granite with inclusions of diorite (?), Dougherty Creek north of Granite Pass, Sierra Nevada. Compare with preceding and following views. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02279 ID. Gilbert, G.K. 2279 Granite with inclusions of diorite (?), near head of Sugarloaf Creek, Sierra Nevada. The tape line is 3 feet long. Compare with preceding and following views. Tulare County, California. 1904 #1:/Gilbert1904-Gilbert G.K. Collection/ggk02280 ID. Gilbert, G.K. 2280 Granite with inclusions of diorite (?), near head of Sugarloaf Creek, Sierra Nevada. The visible portion of tape line is about 10 inches long. The granite has been squeezed and the inclusions stretched until the individuality of inclusions is lost. Compare with preceding views. Tulare County, California. 1904 #1:/Gilbert1904-Gilbert G.K. Collection/ggk02281 ID. Gilbert, G.K. 2281 Northeast face of Mt. Silliman, Sierra Nevada. Two kinds of granite are shown, by a slight difference of color. The paler granite is intruded in the darker, but itself contains included masses of the darker. Tulare County, California. 1904 #1:/Gilbert1904-Gilbert G.K. Collection/ggk02282 ID. Gilbert, G.K. 2282 Northeast face of Mt. Silliman, Sierra Nevada. Two kinds of granite are shown, by a slight difference of color. The paler granite is intruded in the darker, but itself contains included masses of the darker. Tulare County, California. 1904 #1:/Gilbert1904-Gilbert G.K. Collection/ggk02283 ID. Gilbert, G.K. 2283 Aggregation of hornblende crystals in granite, northeast base of Mt. Silliman, Sierra Nevada, Tulare County, California. 1904 #1:/Gilbert1904-Gilbert G.K. Collection/ggk02284 ID. Gilbert, G.K. 2284 Aggregation of hornblende crystals in granite, northeast base of Mt. Silliman, Sierra Nevada, Tulare County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02285 ID. Gilbert, G.K. 2285 Aggregation of hornblende crystals in granite, northeast base of Mt. Silliman, Sierra Nevada, Tulare County, California. 1904 #1:/Gilbert1904-Gilbert G.K. Collection/ggk02286 ID. Gilbert, G.K. 2286 Intrusions of granite in slate, Bear Creek, San Joaquin Basin, Sierra Nevada, Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02287 ID. Gilbert, G.K. 2287 Development of granite bowlders by exfoliation and disintegration, south wall of Kings Canyon, on trail to horse corral. Fresno County, California. 1904 #1:/Gilbert1904-Gilbert G.K. Collection/ggk02288 ID. Gilbert, G.K. 2288 Development of granite bowlders by exfoliation and disintegration, south wall of Kings Canyon, on trail to horse corral. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02289 ID. Gilbert, G.K. 2289 Development of granite boulders by weathering, near Horse Corral Meadows, Sierra Nevada, Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02290 ID. Gilbert, G.K. 2290 Development of granite bowlders by weathering, near Horse Corral Meadows, Sierra Nevada, Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02291 ID. Gilbert, G.K. 2291 Exfoliation of granite near Burton Pass, Sierra Nevada, Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02292 ID. Gilbert, G.K. 2292 Granite crag developed by weathering, summit between Simpson Meadow and Dougherty Creek, Sierra Nevada, Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02293 ID. Gilbert, G.K. 2293 Fault face in granite exposed by post-glacial weathering of shear zone, headwaters of Sugarloaf Creek, Sierra Nevada, Tulare County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02294 ID. Gilbert, G.K. 2294 Moulin (?) pothole on Middle Branch of South Fork of San Joaquin River, Sierra Nevada, Fresno County, California. 1904 #1:/Gilbert1904-Gilbert G.K. Collection/ggk02295 ID. Gilbert, G.K. 2295 Moulin (?) pothole on Middle Branch of South Fork of San Joaquin River, Sierra Nevada, Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02296 ID. Gilbert, G.K. 2296 Roches moutonnees on Middle Branch of South Fork of San Joaquin River, Sierra Nevada, Fresno County, California. 1904 #1:/Gilbert1904-Gilbert G.K. Collection/ggk02297 ID. Gilbert, G.K. 2297 Roches moutonnees, Granite Basin, Sierra Nevada, Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02298 ID. Gilbert, G.K. 2298 Roches moutonnees on Middle Branch of South Fork of San Joaquin River, Sierra Nevada, Fresno County, California. 1904 #1:/Gilbert1904-Gilbert G.K. Collection/ggk02299 ID. Gilbert, G.K. 2299 Roches moutonnees near Evolution Lakes, Sierra Nevada, Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02300 ID. Gilbert, G.K. 2300 Roches moutonnees near Evolution Lakes, Sierra Nevada, Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02301 ID. Gilbert, G.K. 2301 Ice sculpture near Mt. Huxley, Sierra Nevada. Movement from right to left. Fresno County, California. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02302 ID. Gilbert, G.K. 2302 Stream without channel, in glaciated valley near Mt. Huxley, Sierra Nevada, Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02303 ID. Gilbert, G.K. 2303 Stream without channel, in glaciated valley of North Fork of Kings River, Sierra Nevada, Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02304 ID. Gilbert, G.K. 2304 Glaciated granite surface, illustrating plucking; upper valley of Middle Branch of South Fork of San Joaquin River, Sierra Nevada. Ice movement from left to right. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02305 ID. Gilbert, G.K. 2305 Glacial sculpture. South Branch of South Fork of San Joaquin River, Sierra Nevada. The rock is porphyry. Ice motion from right to left. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02306 ID. Gilbert, G.K. 2306 Glaciated boss of schist (?) on South Branch of South Fork of San Joaquin River, Sierra Nevada. Ice motion from foreground to distance. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02307 ID. Gilbert, G.K. 2307 Sculpture by moulin action, South Branch of South Fork of San Joaquin River, Sierra Nevada. Ice motion from foreground to distance. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02308 ID. Gilbert, G.K. 2308 Glacial sculpture in relation to joint, near Evolution Lakes, Sierra Nevada. Ice motion from left to right. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02309 ID. Gilbert, G.K. 2309 Detail of ice sculpture on South Fork of San Joaquin River, Sierra Nevada. The groin was probably determined by joints; the groove engraved by the ice. Direction of motion from foreground to distance. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02310 ID. Gilbert, G.K. 2310 Crescentic gouges near Evolution Lakes, Sierra Nevada. Ice motion from left to right. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02311 ID. Gilbert, G.K. 2311 (General Collection 1602) Crescentic gouges near base of Mt. Huxley, Sierra Nevada. Rock face inclined at 45 degrees toward the foreground. Ice motion from right to left. Fresno County, California. 1904 #1:/Gilbert1904-Gilbert G.K. Collection/ggk02312 ID. Gilbert, G.K. 2312 Crescentic gouges near Evolution Lakes, Sierra Nevada. Ice motion from right to left. Fresno County, California. 1904 #1:/Gilbert1904-Gilbert G.K. Collection/ggk02313 ID. Gilbert, G.K. 2313 Crescentic gouges near Evolution Lakes, Sierra Nevada. The chord of the largest gouge measures 6 1/2 feet. Ice motion from right to left. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02314 ID. Gilbert, G.K. 2314 Crescentic gouges near head of Sugarloaf Creek, Sierra Nevada. Ice motion from right to left. Tulare County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02315 ID. Gilbert, G.K. 2315 Crescentic gouges near base of Mt. Silliman, Sierra Nevada. The rock face slopes steeply toward the foreground. Ice motion from right to left. Tulare County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02316 ID. Gilbert, G.K. 2316 Crescentic gouges near Evolution Lakes, Sierra Nevada. Ice motion from foreground to distance. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02317 ID. Gilbert, G.K. 2317 A circular gouge near Evolution Lakes, Sierra Nevada. This example is unique, but supposed to be a special case of the crescentic gouge. Direction of ice motion from left to right. (To orient the picture turn so that the knife is above the gouge). Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02318 ID. Gilbert, G.K. 2318 Crescentic gouges on Middle Fork of Kings River, Sierra Nevada. The gouges are on the stoss side of the granite boss. Ice motion from left to right. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02319 ID. Gilbert, G.K. 2319 Disruptive gouges near South Fork of San Joaquin River, Sierra Nevada. These gouges are related to crescentic gouges, but anomalous. They occur in a dike of aplite traversing granite, and occupy nearly the whole width of the aplite. Ice motion from left to right. (The knife blade points toward the lower left-hand corner of view). California. Modera Co. 1904) #1:/Yosemite National Park/ggk02320 ID. Gilbert, G.K. 2320 Yosemite National Park, California. Royal Arches and North Dome, viewed from the talus under Glacier Point. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02321 ID. Gilbert, G.K. 2321 Squaw Dome, Sierra Nevada, from the east. Madera County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02322 ID. Gilbert, G.K. 2322 Squaw Dome, Sierra Nevada, from the north. Madera County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02323 ID. Gilbert, G.K. 2323 Eastward from Squaw Dome, Sierra Nevada. In middle distance Balloon Dome. Beyond Balloon Dome, the valley of the South Fork of San Joaquin River. This side of Balloon Dome, the canyon of Middle Fork of the San Joaquin. Madera County, California. 1904 #1:/Gilbert1904-Gilbert G.K. Collection/ggk02324 ID. Gilbert, G.K. 2324 Up Middle Fork of San Joaquin River, Sierra Nevada, from Squaw Dome. Madera County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02325 ID. Gilbert, G.K. 2325 Up the South Fork of San Joaquin River, Sierra Nevada, from divide between Middle Fork and Granite Creek. Almost joins 2326. Madera County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02326 ID. Gilbert, G.K. 2326 Up the Middle Fork of San Joaquin River, Sierra Nevada, from divide between the Middle Fork and Granite Creek. Overlaps 2327 and nearly connects with 2325. Madera County, California. 1904 #1:/Gilbert1904-Gilbert G.K. Collection/ggk02327 ID. Gilbert, G.K. 2327 Up the Middle Fork of the San Joaquin River, Sierra Nevada, from divide between the Middle Fork and Granite Creek. Overlaps 2326. Madera County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02328 ID. Gilbert, G.K. 2328 Up the Middle Fork of San Joaquin River, Sierra Nevada, from point above bridge. Shows main terrace. Madera County, California. 1904 #1:/Gilbert1904-Gilbert G.K. Collection/ggk02329 ID. Gilbert, G.K. 2329 Up Bear Creek, San Joaquin Basin, Sierra Nevada, from divide between Bear Creek and Mono Creek. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02330 ID. Gilbert, G.K. 2330 Up Bear Creek, San Joaquin Basin, Sierra Nevada. At left is the plateau between Bear Creek and Mono Creek. Fresno County, California. 1904 #1:/Gilbert1904-Gilbert G.K. Collection/ggk02331 ID. Gilbert, G.K. 2331 Jackass Dikes, valley of South Fork of San Joaquin River, Sierra Nevada. The river leaves Jackass Meadows (foreground) by a narrow pass at right of the dikes. Fresno County, California. 1904 #1:/Gilbert1904-Gilbert G.K. Collection/ggk02332 ID. Gilbert, G.K. 2332 Valley of South Fork of San Joaquin River, Sierra Nevada, looking up from Jackass Meadows. The treeless slope is bare of soil and without joints. Compare with no. 2333. Madera County, California. 1904 #1:/Gilbert1904-Gilbert G.K. Collection/ggk02333 ID. Gilbert, G.K. 2333 View of rock slope which appears at the right of no. 2332, Madera County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02334 ID. Gilbert, G.K. 2334 Portion of rock slope appearing at left in no. 2332. Joints give footholds for trees. Madera County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02335 ID. Gilbert, G.K. 2335 Down the South Fork of the San Joaquin River, Sierra Nevada. Lake Florence in middle distance. Fresno County, California. 1904 #1:/Gilbert1904-Gilbert G.K. Collection/ggk02336 ID. Gilbert, G.K. 2336 Buttress on north wall of valley of South Fork of San Joaquin River near Blaney Meadows, Sierra Nevada, Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02337 ID. Gilbert, G.K. 2337 Panorama from buttress near Blaney Meadows. (See no. 2336). North wall of valley of South Fork of San Joaquin River, Sierra Nevada. Half way up the slope is a lateral moraine. Fresno County, California. 1904. (Panorama with photos 2338, 2339). #1:/Gilbert1904-Gilbert G.K. Collection/ggk02338 ID. Gilbert, G.K. 2338 Down the South Fork of the San Joaquin River, Sierra Nevada. In the distance are two terraces. Fresno County, California. 1904. (Panorama with photos 2337, 2339). #1:/Gilbert1904-Gilbert G.K. Collection/ggk02339 ID. Gilbert, G.K. 2339 South wall of valley of South Fork of San Joaquin River, Sierra Nevada, showing tabular upland. Fresno County, California. 1904. (Panorama with photos 2337-2338). #1:/Gilbert1904-Gilbert G.K. Collection/ggk02340 ID. Gilbert, G.K. 2340 Valley of South Fork of San Joaquin River, Sierra Nevada, looking up from buttress shown in no. 2336. Shows cirques about Mt. Henry Peak. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02341 ID. Gilbert, G.K. 2341 Valley of South Fork of San Joaquin River, Sierra Nevada, looking up from buttress shown in no. 2336. Shows cirques about Mt. Henry Peak. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02342 ID. Gilbert, G.K. 2342 Down South Fork of San Joaquin River, Sierra Nevada, from hill at junction of main branches. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02343 ID. Gilbert, G.K. 2343 Up North Branch of South Fork of San Joaquin River, Sierra Nevada, from same station as no. 2342. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02344 ID. Gilbert, G.K. 2344 Up South Branch of South Fork of San Joaquin River, Sierra Nevada, from same station as no. 2342. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02345 ID. Gilbert, G.K. 2345 Up South Branch of South Fork of San Joaquin River, from near mouth of branch. The canyon is in rocks of varied texture, chiefly schists. Compare with no. 2344. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02346 ID. Gilbert, G.K. 2346 Hanging valley of Middle Branch of South Fork of San Joaquin River, Sierra Nevada, where it joins the main or south branch. Fresno County, California. (Panorama with no. 2347). 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02347 ID. Gilbert, G.K. 2347 Hanging valley of Middle Branch of South Fork of San Joaquin River, Sierra Nevada, where it joins the main or south branch. Fresno County, California. (Panorama with no. 2346). 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02348 ID. Gilbert, G.K. 2348 Middle Branch of South Fork of San Joaquin River, Sierra Nevada. Cascades below lip of hanging valley. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02349 ID. Gilbert, G.K. 2349 Main valley of Middle Branch of South Fork of San Joaquin River, Sierra Nevada, from near head. At right and left are terraces. The mountains in the distance are beyond the South Branch. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02350 ID. Gilbert, G.K. 2350 Main valley of Middle Branch of South Fork of San Joaquin River, Sierra Nevada, from near head. At right and left are terraces. The mountains in the distance are beyond the South Branch. Fresno County, California, 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02351 ID. Gilbert, G.K. 2351 Main valley of Middle Branch of South Fork of San Joaquin River, Sierra Nevada, from near the head, showing terrace and cirques. The crest forming the sky line separates the Middle Branch from the North Branch. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02352 ID. Gilbert, G.K. 2352 Left wall of main valley of Middle Branch of South Fork of San Joaquin River, Sierra Nevada, showing terraces and a tributary creek which has no valley. Fresno County, California. 1904 #1:/Gilbert1904-Gilbert G.K. Collection/ggk02353 ID. Gilbert, G.K. 2353 Up the main valley of the Middle Branch of the South Fork of San Joaquin River, Sierra Nevada. At the right, Hermit Peak; at left Darwin Peak. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02354 ID. Gilbert, G.K. 2354 The Hermit Peak (?), Sierra Nevada, Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02355 ID. Gilbert, G.K. 2355 The Hermit Peak (?), Sierra Nevada, Fresno County, California. 1904. (Panorama with photo no. 2356). #1:/Gilbert1904-Gilbert G.K. Collection/ggk02356 ID. Gilbert, G.K. 2356 Crest south of Middle Branch of South Fork of San Joaquin River, Sierra Nevada, separating it from South Branch. Below the crest is the schrund line, and at left a small glacier. The valley in the central view overhangs the main valley of the Middle Branch. (Compare with no. 2357). Fresno County, California. 1904. (Panorama with photo no. 2355). #1:/Gilbert1904-Gilbert G.K. Collection/ggk02357 ID. Gilbert, G.K. 2357 Hanging valley on south side of main valley of Middle Branch of South Fork of San Joaquin River, Sierra Nevada. In the distance a glacier, shown also in photos 2355, 2356 and 2374. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02358 ID. Gilbert, G.K. 2358 Northward from sill of hanging valley shown in photo 2357, across main valley of Middle Branch of South Fork of San Joaquin River, Sierra Nevada. A hanging valley is shown on the opposite wall, and below it lines of vegetation mark courses of master joints. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02359 ID. Gilbert, G.K. 2359 Kings Canyon National Park. View Peak, from the north. From this peak, in upper basin of Middle Branch of South Fork of San Joaquin River, were taken the series of views 2360-2375. In the foreground is the main valley of the Middle Branch as it leaves the valley of Evolution Lakes and starts on its ascent to the main valley, 1,000 feet below. A smaller hanging valley is seen under the peak. The peak was a nunatak during the epoch of maximum glaciation. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02360 ID. Gilbert, G.K. 2360 Panorama from View Peak, Sierra Nevada. (See no. 2359). North-north-west, Divide between North and Middle Branches of South Fork of San Joaquin River. California. 1904. Panorama with photo nos. 2361-2369). #1:/Gilbert1904-Gilbert G.K. Collection/ggk02361 ID. Gilbert, G.K. 2361 Northwest (magnetic). At right divide between North and Middle Branches of South Fork of San Joaquin River, Sierra Nevada, with high terrace of Middle Branch. At left Hermit Peak. California, 1904. (Panorama with photo nos. 2360, 2362-2369). #1:/Gilbert1904-Gilbert G.K. Collection/ggk02362 ID. Gilbert, G.K. 2362 North 70 degrees West (magnetic). At right the Hermit Peak (?); at left crest between Middle and South Branches of South Fork of San Joaquin River, Sierra Nevada. California. 1904. (Panorama with photo nos. 2360-2361, 2363-2369). #1:/Kings Canyon National Park/ggk02363 ID. Gilbert, G.K. 2363 Kings Canyon National Park, California. Crest between the middle and south branches of the South Fork San Joaquin River. Hanging valley and unnamed glacier. The descent of the main valley is toward the right. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02364 ID. Gilbert, G.K. 2364 South 30 degrees West (magnetic). At left Mt. Goddard, California. 1904. (Panorama with photo nos. 2360-2363, 2365-2369). Fresno County. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02365 ID. Gilbert, G.K. 2365 Kings Canyon Nat. Park. South. At right Mt. Goddard. Under the crest two small glaciers. California. 1904. (Panorama with photo nos. 2360-2364, 2366-2369). #1:/Gilbert1904-Gilbert G.K. Collection/ggk02366 ID. Gilbert, G.K. 2366 Southeast. Near center Mt. Huxley; at left (?) Mt. Spencer. California. 1904 (Panorama with photo nos. 2360-2365, 2367-2369). #1:/Gilbert1904-Gilbert G.K. Collection-Sequoia and Kings Canyon National Park/ggk02367 ID. Gilbert, G.K. 2367 Kings Canyon National Park, East. At right Mt. Spencer; near center Mt. Haeckel. California. 1904. (Panorama with photo nos.2360-2366, 2368-2369). Sequoia and Kings Canyon National Park. #1:/Kings Canyon National Park/ggk02368 ID. Gilbert, G.K. 2368 Kings Canyon National Park, California. Near the center of Mount Darwin. The schrund line is well marked. 1904. #1:/Kings Canyon National Park/ggk02369 ID. Gilbert, G.K. 2369 Kings Canyon National Park, California. West end of Darwin Crest. The schrund line is well marked. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02374 ID. Gilbert, G.K. 2374 Looking south-southwest from View Peak, Sierra Nevada. An unnamed glacier under the crest separating the Middle and South Branches of the South Fork of the San Joaquin River. (Compare with photo nos. 2363, 2355, 2356, 2357). Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02375 ID. Gilbert, G.K. 2375 Sequoia and Kings Canyon National Park. Upper lakes of Evolution series, from View Peak, Sierra Nevada. (Compare with no. 2365). Fresno County, California. July 17, 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02376 ID. Gilbert, G.K. 2376 The photographic station is on the north side of the main valley of the Middle Branch of the South Fork of San Joaquin River, Sierra Nevada, near the sill of hanging valley shown in photo no. 2358. The two summits are the Hermit Mountain (?). In the distance, just at left of Hermit Mountain, is Mt. Goddard; at the extreme left View Peak. Fresno County, California. 1904 (Panorama with photo no. 2377). #1:/Gilbert1904-Gilbert G.K. Collection/ggk02377 ID. Gilbert, G.K. 2377 At right View Peak; at left of center Mt. Huxley; at left Mt. Spencer; toward Huxley and Spencer are the lower of the Evolution Lakes. California. 1904. (Panorama with photo no. 2376). #1:/Gilbert1904-Gilbert G.K. Collection/ggk02378 ID. Gilbert, G.K. 2378 Mt. Huxley (center) and Mt. Spencer (left. (Sierra Nevada, from the southwest. (Compare with no. 2377). Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02379 ID. Gilbert, G.K. 2379 Peaks about the head of Middle Branch of South Fork of San Joaquin River, Sierra Nevada. The view is similar to no. 2377, but from a lower standpoint. At extreme right the slope of the Hermit Mountain (?); at right of center View Peak; at left of center Mt. Huxley; second peak from left margin Mt. Spencer. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02380 ID. Gilbert, G.K. 2380 Glacial sculpture of jointed granite east base of View Peak, near Evolution Lakes, Sierra Nevada. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02381 ID. Gilbert, G.K. 2381 Sequoia and Kings Canyon National Park. Mt. Huxley, Sierra Nevada, from the southwest. In foreground one of the Evolution Lakes. Fresno County, California. 1904. #1:/Kings Canyon National Park/ggk02382 ID. Gilbert, G.K. 2382 Kings Canyon National Park, California. Largest of the Evolution Lakes. View Peak on the extreme right. Mount Huxley in the distance. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02383 ID. Gilbert, G.K. 2383 Sequoia and Kings Canyon National Park. Valley of Evolution Lakes, Sierra Nevada. At right of center Mt. Huxley; at left of center the more distant point is Mt. Spencer. Fresno County, California. 1904. #1:/Kings Canyon National Park/ggk02384 ID. Gilbert, G.K. 2384 Kings Canyon National Park, California. Mount Huxley and Evolution Lake. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02385 ID. Gilbert, G.K. 2385 Sequoia and Kings Canyon National Park. Up the valley of Evolution Lakes, Sierra Nevada, Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02386 ID. Gilbert, G.K. 2386 Sequoia and Kings Canyon National Park. Down the valley of Evolution Lakes, Sierra Nevada. At right Darwin Crest. Fresno County, California. 1904. #1:/Kings Canyon National Park/ggk02387 ID. Gilbert, G.K. 2387 Kings Canyon National Park, California. Step in the valley of Evolution Lake, marking the site of the cascade of a Pleistocene glacier. A modern glacier is seen in the distance. Mount Goddard on the right. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02388 ID. Gilbert, G.K. 2388 Sequoia and Kings Canyon National Park. Step in valley of Evolution Lakes, Sierra Nevada, seen from sill of hanging valley. At left Mt. Goddard. (Compare with no. 2387). Fresno County, California. 1904. #1:/Kings Canyon National Park/ggk02389 ID. Gilbert, G.K. 2389 Kings Canyon National Park, California. Mount Huxley. Terrace of an avalanche drift on the left. 1904. #1:/Kings Canyon National Park/ggk02390 ID. Gilbert, G.K. 2390 Kings Canyon National Park, California. Deep rock-basin lake at the base of Mount Huxley. Ice motion from left to right. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02391 ID. Gilbert, G.K. 2391 Sequoia and Kings Canyon National Park. Glaciated coll between Mt. Huxley (right) and Mt. Spencer (left). (Compare with nos. 2389, 2390). Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02392 ID. Gilbert, G.K. 2392 Hanging valley on south side of South Branch of South Fork of San Joaquin River, Sierra Nevada, seen from near sill of Middle Branch. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02393 ID. Gilbert, G.K. 2393 Down South Branch of South Fork of San Joaquin River, Sierra Nevada, from rock buttress near old copper mine. The principal rock, except in extreme distance, is slate. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02394 ID. Gilbert, G.K. 2394 Up South Branch of South Fork of San Joaquin River, Sierra Nevada, from rock buttress near old copper mine. The principal rock, except in extreme distance, is slate. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02395 ID. Gilbert, G.K. 2395 Hanging valley on south wall of South Branch of South Fork of San Joaquin River, Sierra Nevada, seen from buttress near old copper mine. The rock of the wall is slate. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02396 ID. Gilbert, G.K. 2396 Up the South Branch of South Fork of San Joaquin River, Sierra Nevada, from point near upper limit of slate outcrop. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02397 ID. Gilbert, G.K. 2397 Down the South Branch of South Fork of San Joaquin River, Sierra Nevada, from the main bend. The nearer part of the valley is in granite. (Compare with nos. 2393, 2394), Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02398 ID. Gilbert, G.K. 2398 Sequoia and Kings Canyon National Park. Mt. Goddard, Sierra Nevada, from the south. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02399 ID. Gilbert, G.K. 2399 Sequoia and Kings Canyon National Park. Lake at southwest base of Mt. Goddard, Sierra Nevada. At left the slope of Mt. Goddard. Across the lake a medial moraine, beyond which is another lake. Beyond the low saddles at right and in middle of view are glacial troughs descending toward the east and southeast. These have been truncated by the development of the trough containing the lakes. For lakes compare 2401 and 2402; for the head troughs compare 2411 and 2414. Fresno County, California. 1904. (Panorama with photo no. 2400). #1:/Gilbert1899-Gilbert G.K. Collection-Southeastern Alaska Region-Glacier Bay District/ggk0239a ID. Gilbert, G.K. 239a Harriman expedition. Iceberg in Muir Inlet, Glacier Bay. Glacier Bay district, Southeastern Alaska region, Alaska. 1899. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02400 ID. Gilbert, G.K. 2400 Sequoia and Kings Canyon National Park. Lake at southwest base of Mt. Goddard, Sierra Nevada. At left the slope of Mt. Goddard. Across the lake a medial moraine, beyond which is another lake. Beyond the low saddles at right and in middle of view are glacial troughs descending toward the east and southeast. These have been truncated by the development of the trough containing the lakes. For lakes compare 2401 and 2402; for the head troughs compare 2411 and 2414. Fresno County, California. 1904. (Panorama with photo no. 2399). #1:/Gilbert1904-Gilbert G.K. Collection/ggk02401 ID. Gilbert, G.K. 2401 Lakes at southwest base of Mt. Goddard, Sierra Nevada. (See 2399). Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02402 ID. Gilbert, G.K. 2402 Lakes at southwest base of Mt. Goddard, Sierra Nevada. (See 2399). Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02403 ID. Gilbert, G.K. 2403 East-southeast from summit of Mt. Goddard, Sierra Nevada. On the sky line The Palisades; nearer by a tabular remnant of pre-glacial topography. (Narrow-angle lens). Fresno County, California. 1904. (Panorama with photo no. 2404). #1:/Gilbert1904-Gilbert G.K. Collection/ggk02404 ID. Gilbert, G.K. 2404 Eastward from summit of Mt. Goddard, Sierra Nevada. (Narrow-angle lens), California. 1904. (Panorama with photo no. 2403). #1:/Gilbert1904-Gilbert G.K. Collection/ggk02405 ID. Gilbert, G.K. 2405 Eastward from side of Mt. Goddard, Sierra Nevada. The pass at left of the lake separates the basin of Evolution Lakes from Kings River drainage. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02406 ID. Gilbert, G.K. 2406 Northwest from Mt. Goddard, head of Goddard Creek, Sierra Nevada, Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02407 ID. Gilbert, G.K. 2407 Southwest from Mt. Goddard, Sierra Nevada, Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02408 ID. Gilbert, G.K. 2408 South (magnetic) from Mt. Goddard, Sierra Nevada, Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02409 ID. Gilbert, G.K. 2409 Sequoia and Kings Canyon National Park. Frozen lakes at base of Mt. Goddard, Sierra Nevada, Fresno County, California. July 20, 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02410 ID. Gilbert, G.K. 2410 K.C. National park. Frozen lakes at base of Mt. Goddard, Sierra Nevada, Fresno County, California. July 20, 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02411 ID. Gilbert, G.K. 2411 Southwest from spur of Mt. Goddard, Sierra Nevada. The troughs at right and left of the center peak have been beheaded by the trough of the foreground. (Compare with 2399, 2414). At the extreme right is a small summit lake marking the site of a beheaded cirque. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02412 ID. Gilbert, G.K. 2412 Beheaded troughs near Mt. Goddard, Sierra Nevada. (Compare 2399, Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02413 ID. Gilbert, G.K. 2413 Beheaded troughs near Mt. Goddard, Sierra Nevada. (Compare 2399, 2411), Fresno County, California. 1904. #1:/Kings Canyon National Park/ggk02414 ID. Gilbert, G.K. 2414 Kings Canyon National Park, California. Goddard Divide separating the head of the South Branch San Joaquin River from the drainage of Kings River. Several troughs descending toward the right from the crest are beheaded by growth of the master trough on the left. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02415 ID. Gilbert, G.K. 2415 Plateau or terrace on upper waters of South Branch of South Fork of San Joaquin River, Sierra Nevada, seen from the slope of Mt. Goddard. In lower right-hand corner a rock-basin lake and post-glacial delta; also represented in no. 2416. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02416 ID. Gilbert, G.K. 2416 Delta and rock-basin lake near base of Mt. Goddard, Sierra Nevada. The stream issues from a narrow box canyon at right (not seen), and in time of flood enters the lake with strong momentum. As a result the delta is best developed forward, and there are three channels, one medial and the others lateral. (Compare 2415). Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02417 ID. Gilbert, G.K. 2417 Northward across canyon of South Branch of South Fork of San Joaquin River, Sierra Nevada, Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02418 ID. Gilbert, G.K. 2418 Northward across canyon of South Branch of South Fork of San Joaquin River, Sierra Nevada, Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02419 ID. Gilbert, G.K. 2419 Down valley of South Branch of South Fork of San Joaouin River, Sierra Nevada. Spurs at left are remnants of a dissected terrace, of which suggestion is also seen at right. The hanging valley of the Middle Branch lies beyond the dark spur at right. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02420 ID. Gilbert, G.K. 2420 Valley of the South Branch of South Fork of San Joaquin River, Sierra Nevada, Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02421 ID. Gilbert, G.K. 2421 Valley of South Branch of South Fork of San Joaquin River, Sierra Nevada. (Compare 2419). Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02422 ID. Gilbert, G.K. 2422 Valley of South Branch of South Fork of San Joaquin River, Sierra Nevada. (Compare 2419). Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02423 ID. Gilbert, G.K. 2423 Dissected terrace on south side of canyon of South Branch of South Fork of San Joaquin River, Sierra Nevada, The camera stands on a remnant of a terrace at the north base of Red Mountain. Fresno County, California. 1904. #1:/Kings Canyon National Park/ggk02424 ID. Gilbert, G.K. 2424 Kings Canyon National Park, California. Up the south branch of the South Fork San Joaquin River, viewed from a terrace remnant at the base of Red Mountain. Mount Goddard in the distance on the left. 1904. Figure 26, U.S. Geological Survey Professional Paper 329. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02425 ID. Gilbert, G.K. 2425 Southeast from Red Mountain, a summit, on the divide between San Joaquin and Kings Rivers, Sierra Nevada. The continuation of the divide is seen in the left-hand portion of view. At right a tabular remnant of pre-glacial topography. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02426 ID. Gilbert, G.K. 2426 Dome structure near south base of Red Mountain, Sierra Nevada, Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02427 ID. Gilbert, G.K. 2427 Northeast from lower rim of Titan's Tub, Sierra Nevada. The basin drains toward the North Fork of Kings River, which lies at the left. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02428 ID. Gilbert, G.K. 2428 Northwest from lower rim of Titan's Tub, Sierra Nevada. The basin drains toward the North Fork of Kings River, which lies at the left. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02429 ID. Gilbert, G.K. 2429 Westward down the North Fork of Kings River from the lower rim of Titan's Tub. Fresno County, California. 1904. (Panorama with photo no. 2430). #1:/Gilbert1904-Gilbert G.K. Collection/ggk02430 ID. Gilbert, G.K. 2430 Westward down the North Fork of Kings River from the lower rim of Titan's Tub. Fresno County, California. 1904. (Panorama with photo no. 2429). #1:/Gilbert1904-Gilbert G.K. Collection/ggk02431 ID. Gilbert, G.K. 2431 Hanging valley above Titan's Tub, basin of North Fork of Kings River, Sierra Nevada, Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02432 ID. Gilbert, G.K. 2432 Cliff above Titan's Tub, basin of North Fork of Kings River, Sierra Nevada. (Compare 2433, 2434). Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02433 ID. Gilbert, G.K. 2433 Cliff above Titan's Tub, basin of North Fork of Kings River, Sierra Nevada. (Compare 2432, 2434). Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02434 ID. Gilbert, G.K. 2434 Cliff above Titan's Tub, basin of North Fork of Kings River, Sierra Nevada. (Compare 24329 2433). Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02435 ID. Gilbert, G.K. 2435 Northward across canyon of North Fork of Kings River, Sierra Nevada, Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02436 ID. Gilbert, G.K. 2436 Northeastward across canyon of North Fork of Kings River, Sierra Nevada. Dome structure. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02437 ID. Gilbert, G.K. 2437 Upper valley of North Fork of Kings River, Sierra Nevada, Fresno County, California. 1904. (Panorama with photo no. 2438). #1:/Gilbert1904-Gilbert G.K. Collection/ggk02438 ID. Gilbert, G.K. 2438 Northeastward across valley of North Fork of Kings River, Sierra Nevada. A lateral moraine contours the slope at mid-height from left to middle of view. Above this, to a line near the base of summit peak, the rock surface is more weathered than below, and was probably glaciated during an earlier glacial epoch. Fresno County, California. 1904. (Panorama with photo no. 2437). #1:/Gilbert1904-Gilbert G.K. Collection/ggk02439 ID. Gilbert, G.K. 2439 Dome structure on south wall of North Fork of Kings River, Sierra Nevada, near pass. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02440 ID. Gilbert, G.K. 2440 Spur in north wall of Middle Fork of Kings River below Tehipite Dome, Sierra Nevada, Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02441 ID. Gilbert, G.K. 2441 Up the valley of Middle Fork of Kings River, Sierra Nevada, showing Tehipite Valley and dissected upland. Fresno County, California. (Panorama with photo no. 2442). 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02442 ID. Gilbert, G.K. 2442 Up the valley of Middle Fork of Kings River, Sierra Nevada, showing Tehipite Valley and dissected upland. Tehipite Dome at right, Kettle Dome at left. Fresno County, California. 1904. (Panorama with photo no. 2441) #1:/Gilbert1904-Gilbert G.K. Collection/ggk02443 ID. Gilbert, G.K. 2443 Eastward up Tehipite Canyon, Sierra Nevada. Tehipite Dome at left. Fresno County, California. 1904. #1:/Kings Canyon National Park/ggk02445 ID. Gilbert, G.K. 2445 Kings Canyon National Park, California. Tehipite Dome, viewed from Tehipite Valley. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02446 ID. Gilbert, G.K. 2446 Down Tehipite Canyon, Sierra Nevada, from point 3 miles above Tehipite Valley. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02447 ID. Gilbert, G.K. 2447 (General Collection 1702) Up Goddard Creek, Sierra Nevada, from opposite wall of Simpson Valley. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02448 ID. Gilbert, G.K. 2448 Down canyon of Middle Fork of Kings River, Sierra Nevada, from above Simpson Meadow. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02449 ID. Gilbert, G.K. 2449 Down Middle Fork of Kings Canyon, Sierra Nevada, from point on trail south of Simpson Meadow. (See 2450). Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02450 ID. Gilbert, G.K. 2450 Down Middle Fork of Kings Canyon, Sierra Nevada, from point on trail south of Simpson Meadow. (See 2449). Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02451 ID. Gilbert, G.K. 2451 Shallow cirque on west wall of Dougherty Canyon, Sierra Nevada, Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02452 ID. Gilbert, G.K. 2452 Palisades, and dissected plateau below them, from trail south of Simpson Meadow, Sierra Nevada, Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02453 ID. Gilbert, G.K. 2453 North-northeast from trail of summit south of Simpson Meadow, Sierra Nevada. At right The Palisades, with dissected plateau below; at left Mt. Woodworth. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02454 ID. Gilbert, G.K. 2454 Westward across Dougherty Canyon, Sierra Nevada, showing shallow cirques on north-facing slopes. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02455 ID. Gilbert, G.K. 2455 South-southwest across Dougherty Basin, Sierra Nevada, Fresno County, California. 1904. #1:/Kings Canyon National Park/ggk02456 ID. Gilbert, G.K. 2456 Kings Canyon National Park, California. Southeast from Dougherty Basin. Illustrates asymmetry of ridges between glacier troughs. Goat Peak in the center distance. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02457 ID. Gilbert, G.K. 2457 Eastward up one of the troughs shown in no. 2456. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02458 ID. Gilbert, G.K. 2458 Influence of joints on glacial erosion, Dougherty Basin, near Granite Pass, Sierra Nevada, Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02459 ID. Gilbert, G.K. 2459 West wall of Granite Basin, from Granite Pass, Sierra Nevada, Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02460 ID. Gilbert, G.K. 2460 West wall of Granite Basin, Sierra Nevada, from the southeast. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02461 ID. Gilbert, G.K. 2461 Southward in Granite Basin, Sierra Nevada, Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02462 ID. Gilbert, G.K. 2462 Southward in lower end of Granite Basin, Sierra Nevada, Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02463 ID. Gilbert, G.K. 2463 Southeast side of Goat Mountain, Sierra Nevada, showing shallow cirques. At the extreme right Kid Peak. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02464 ID. Gilbert, G.K. 2464 Goat Mountain, Sierra Nevada, from Kid Peak. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02465 ID. Gilbert, G.K. 2465 Goat Mountain, Sierra Nevada, from Kid Peak. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02466 ID. Gilbert, G.K. 2466 Sequoia and Kings Canyon National Park. Basin north of Goat Mountain, Sierra Nevada, from Kid Peak. Fresno County, California. (Panorama with photo no. 2467). 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02467 ID. Gilbert, G.K. 2467 Basin north of Goat Mountain, Sierra Nevada, from Kid Peak. Fresno County, California. (Panorama with photo no. 2466) 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02468 ID. Gilbert, G.K. 2468 Plateau between canyons of Kings River (left) and Wood Creek (right), from Kid Peak, Sierra Nevada. At the left Arrow Ridge. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02469 ID. Gilbert, G.K. 2469 Panorama, from Kid Peak, Sierra Nevada. At left Arrow Ridge, beyond the canyon of Kings River; at right Wood Creek. Fresno County, California. 1904. (Panorama with photo nos. 2470, 2471). #1:/Gilbert1904-Gilbert G.K. Collection/ggk02470 ID. Gilbert, G.K. 2470 Panorama, from Kid Peak, Sierra Nevada. Canyon of Wood Creek. Fresno County, California. 1904. (Panorama with photo nos. 2469, 2471). #1:/Gilbert1904-Gilbert G.K. Collection/ggk02471 ID. Gilbert, G.K. 2471 Panorama, from Kid Peak, Sierra Nevada. Plateau between canyons of Wood Creek and Bubbs Creek. At right Mt. Cardiner. Acute peak near center Mt. Clarence King. Fresno County, California. 1904. (Panorama with photo nos. 2469, 2470). #1:/Gilbert1904-Gilbert G.K. Collection/ggk02472 ID. Gilbert, G.K. 2472 Canyon of Wood Creek, Sierra Nevada, from Kid Peak. (Compare 2470). Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02473 ID. Gilbert, G.K. 2473 Paradise Valley, Sierra Nevada, from Buck Peak. At the head of the valley Kings River Canyon is joined, from the right, by the canyon of Wood Creek. (Compare 2468). Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02474 ID. Gilbert, G.K. 2474 Paradise Valley, Sierra Nevada, from Buck Peak. At the head of the valley Kings River Canyon is joined, from the right, by the canyon of Wood Creek. (Compare 2468). Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02475 ID. Gilbert, G.K. 2475 Down Kings River Canyon, Sierra Nevada, from peak overlooking Paradise Valley. Where the canyon turns to the right it is joined, from the left, by the canyon of Bubbs Creek. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02476 ID. Gilbert, G.K. 2476 Dissected terrace of Kings River Valley, Sierra Nevada, southeast of Goat Mountain. The knob at the extremity of the terrace is Buck Peak; above this Avalanche Peak; in distance at left Mt. Brewer. The even skyline at right is given by the tableland east of Mt. Silliman. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02477 ID. Gilbert, G.K. 2477 Across Kings River Canyon, Sierra Nevada, from terrace below Goat Mountain. Mt. Brewer in distance left of center. Bubb Creek joins Kings River over withers of horse. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02478 ID. Gilbert, G.K. 2478 Mt. Clarence King (left) and Mt. Gardiner (right. (Sierra Nevada, from Buck Peak. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02479 ID. Gilbert, G.K. 2479 Mt. Gardiner, Sierra Nevada, from divide between Granite Basin and Copper Creek. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02480 ID. Gilbert, G.K. 2480 East-southeast from divide between Granite Basin and Copper Creek, Sierra Nevada. At left Mt. Clarence King; at left of center Mt. Gardiner; in distance at right Mt. Brewer. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02481 ID. Gilbert, G.K. 2481 Frontal moraine retaining a lake, south base of Goat Mountain, Sierra Nevada, Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02482 ID. Gilbert, G.K. 2482 Moraines of Copper Creek Canyon, Sierra Nevada, from Buck Peak. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02483 ID. Gilbert, G.K. 2483 Lateral moraines of Copper Creek Canyon, Sierra Nevada, Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02484 ID. Gilbert, G.K. 2484 Lateral moraine of Copper Creek Canyon, Sierra Nevada, Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02485 ID. Gilbert, G.K. 2485 Lateral moraine of Copper Creek Canyon, Sierra Nevada, Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02486 ID. Gilbert, G.K. 2486 Profile of alluvial slope in Copper Creek Canyon, Sierra Nevada, Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02487 ID. Gilbert, G.K. 2487 Crest of a frontal moraine in Kings River Canyon, Sierra Nevada, Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02488 ID. Gilbert, G.K. 2488 Down Kings River Canyon, Sierra Nevada, from the Summit Meadow trail. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02489 ID. Gilbert, G.K. 2489 Up Kings River Canyon, Sierra Nevada, from the Cooper Creek trail. The canyon turns abruptly to the left this side of the waterfall. Its apparent continuation is the canyon of Bubbs Creek. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02490 ID. Gilbert, G.K. 2490 South wall of Kings River Canyon, Sierra Nevada, from the Copper Creek trail. Fresno County, California. 1904. (Panorama with photo no. 2491). #1:/Gilbert1904-Gilbert G.K. Collection/ggk02491 ID. Gilbert, G.K. 2491 South wall of Kings River Canyon, Sierra Nevada, from the Copper Creek trail. Fresno County, California. 1904. (Panorama with photo no. 2490). #1:/Gilbert1904-Gilbert G.K. Collection/ggk02492 ID. Gilbert, G.K. 2492 South wall of Kings River Canyon, Sierra Nevada, from the Copper Creek trail. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02493 ID. Gilbert, G.K. 2493 Down Kings River Canyon, Sierra Nevada, from Summit Meadow trail. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02494 ID. Gilbert, G.K. 2494 Up Kings River Canyon, Sierra Nevada, from trail near Lookout Peak. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02495 ID. Gilbert, G.K. 2495 Up Kings River Canyon, Sierra Nevada, from trail near Lookout Peak. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02496 ID. Gilbert, G.K. 2496 Panorama, from Kettle Peak, Sierra Nevada. Sugarloaf Basin, and beyond it Avalanche Peak. Tulare County, California. 1904. (Panorama with photo nos. 2497, 2498). #1:/Gilbert1904-Gilbert G.K. Collection/ggk02497 ID. Gilbert, G.K. 2497 Panorama, from Kettle Peak, Sierra Nevada. Southern slopes of Sugarloaf Basin, At rip-lit the middle Ball Dome. Tulare County, California. 1904. (Panorama with photos no. 2496, 2498). #1:/Gilbert1904-Gilbert G.K. Collection/ggk02498 ID. Gilbert, G.K. 2498 Panorama, from Kettle Peak, Sierra Nevada. At right Silliman Crest and Mt. Silliman; at left, with snowbank, the tableland between Sugarloaf Creek and Kaweah River. Tulare County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02499 ID. Gilbert, G.K. 2499 The Sugarloaf, a granite dome, south of Kings River Canyon, Sierra Nevada, Tulare County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02500 ID. Gilbert, G.K. 2500 Ball Dome, near Silliman Crest, Sierra Nevada, Tulare County, California. 1904 #1:/Gilbert1904-Gilbert G.K. Collection/ggk02501 ID. Gilbert, G.K. 2501 Lower part of Silliman Crest, Sierra Nevada, from Mt. Maddox. At left Kettle Peak. Tulare County, California. 1904. (Panorama with photo no. 2502). #1:/Gilbert1904-Gilbert G.K. Collection/ggk02502 ID. Gilbert, G.K. 2502 Mt. Silliman and Silliman Crest, Sierra Nevada, from Mt. Maddox. At right Kettle Peak, Tulare County, California. 1904. (Panorama with photo no. 2501). #1:/Gilbert1904-Gilbert G.K. Collection/ggk02503 ID. Gilbert, G.K. 2503 Silliman Crest, Sierra Nevada, from near Kettle Peak. (Compare 2498). Tulare County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02504 ID. Gilbert, G.K. 2504 Scarp side of Silliman Crest, Sierra Nevada, from near Kettle Peak. Tulare County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02505 ID. Gilbert, G.K. 2505 Mt. Silliman, Sierra Nevada, from the east. Tulare County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02506 ID. Gilbert, G.K. 2506 Panorama, from near Ball Dome, Sierra Nevada. Northeast face of Silliman Crest. Mt. Silliman at left. (Compare 2498, 2503). Tulare County, California. 1904. (Panorama with photo nos. 2507, 2508). #1:/Gilbert1904-Gilbert G.K. Collection/ggk02507 ID. Gilbert, G.K. 2507 Panorama, from near Ball Dome, Sierra Nevada. Upper basin of South Fork of Sugarloaf Creek. Mt. Silliman at right of center. Tulare County. California. 1904. (Panorama with photo nos. 2506, 2508). #1:/Gilbert1904-Gilbert G.K. Collection/ggk02508 ID. Gilbert, G.K. 2508 Panorama, from near Ball Dome, Sierra Nevada. Upper basin of South Fork of Sugarloaf Creek. Tulare County, California. 1904. (Panorama with photo nos. 2506, 2507). #1:/Gilbert1904-Gilbert G.K. Collection/ggk02509 ID. Gilbert, G.K. 2509 Northeast face of Silliman Crest, Sierra Nevada, from the southeast. Tulare County, California. 1904. (Panorama with photo no. 2510). #1:/Gilbert1904-Gilbert G.K. Collection/ggk02510 ID. Gilbert, G.K. 2510 Mt. Silliman, Sierra Nevada, from the southeast. Tulare County, California. 1904. (Panorama with photo no. 2509). #1:/Gilbert1904-Gilbert G.K. Collection/ggk02511 ID. Gilbert, G.K. 2511 Northeast slope of Silliman Crest, Sierra Nevada, from the southeast, Tulare County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02512 ID. Gilbert, G.K. 2512 Upper part of Silliman Crest, Sierra Nevada, from east base of Mt, Silliman. Tulare County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02513 ID. Gilbert, G.K. 2513 Pirate cirque, from near Ball Dome, Sierra Nevada. The cirque opens to the valley of the South Fork of Sugarloaf Creek, and encroaches on a cirque of the valley of the East Fork. (See 2514-2517, 2530). Tulare County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02514 ID. Gilbert, G.K. 2514 Northeast wall of Pirate cirque, Sierra Nevada. (Compare 2513). County, California. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02515 ID. Gilbert, G.K. 2515 Southwest wall of Pirate cirque. At right Mt. Silliman. (Compare 2513). Tulare County, California. 1904. (Panorama with photo no. 2516). #1:/Gilbert1904-Gilbert G.K. Collection/ggk02516 ID. Gilbert, G.K. 2516 Pirate cirque. At the right, portion of the southwest wall; at left, the divide between two branches of Sugarloaf Creek. (Compare 2513). Tulare County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02517 ID. Gilbert, G.K. 2517 Portion of divide between South and East branches of Sugarloaf Creek, Sierra Nevada. At right, Pirate cirque; at left, a cirque facing valley of East Sugarloaf Creek. (Compare 2513). Tulare County, California. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02518 ID. Gilbert, G.K. 2518 North 30 degrees East. Panorama from point above Pirate cirque, showing sky line, Tulare County, California. 1904. (Panorama with photo nos. 2519-2520). #1:/Gilbert1904-Gilbert G.K. Collection/ggk02519 ID. Gilbert, G.K. 2519 North. Panorama from point above Pirate cirque, showing sky line. Tulare County, California, 1904. (Panorama with photo nos. 2518, 2520). #1:/Gilbert1904-Gilbert G.K. Collection/ggk02520 ID. Gilbert, G.K. 2520 North 40 degrees West. Panorama from point above Pirate cirque, showing sky line. Tulare County, California. 1904. (Panorama with photo nos. 2518-2519). #1:/Gilbert1904-Gilbert G.K. Collection/ggk02521 ID. Gilbert, G.K. 2521 Cliff near head of South Fork of Sugarloaf Creek, Sierra Nevada, Tulare County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02522 ID. Gilbert, G.K. 2522 North side of Alta Peak Crest, Sierra Nevada, from summit of tableland. Tulare County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02523 ID. Gilbert, G.K. 2523 High tableland between Kings and Kaweah Rivers, Sierra Nevada, from the west. At right Alta Peak; in the distance Kaweah Peak. Tulare County, California. 1904. (Panorama with photo no. 2524). #1:/Gilbert1904-Gilbert G.K. Collection/ggk02524 ID. Gilbert, G.K. 2524 High tableland between Kings and Kaweah Rivers, Sierra Nevada. In the center, the highest part of tableland; at right Kaweah Peak; at left cirque at head of East Fork of Sugarloaf Creek. Tulare County, California. 1904. (Panorama with photo no. 2523). #1:/Gilbert1904-Gilbert G.K. Collection/ggk02525 ID. Gilbert, G.K. 2525 High tableland between Kings and Kaweah Rivers, Sierra Nevada. Cirque at head of East Fork of Sugarloaf Creek, and group of Pinus albicaulis. Tulare County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02526 ID. Gilbert, G.K. 2526 Cirque at head of East Fork of Sugarloaf Creek, Sierra Nevada. (Compare 2524 and 2525). Tulare County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02527 ID. Gilbert, G.K. 2527 Granite spire at head of divide between Sugarloaf and Bog Creeks, Sierra Nevada. (Compare 2528). Tulare County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02528 ID. Gilbert, G.K. 2528 Arete between heads of Sugarloaf and Bog Creeks, Sierra Nevada. Another view of the spire in 2527. Tulare County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02529 ID. Gilbert, G.K. 2529 Down East Fork of Sugarloaf Creek, Sierra Nevada, from tableland. Tulare County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02530 ID. Gilbert, G.K. 2530 Northward from edge of tableland. At right the East Fork of Sugarloaf Creek; at left the South Fork of Sugarloaf Creek. The ancient glacier from the cirque in foreground descended to both valleys, crossing the divide where breached by the Pirate cirque (see 2513 to 2517). The even sky is given by uplands between main branches of Kings River. Tulare California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02531 ID. Gilbert, G.K. 2531 Lower canyon of Kings River, Sierra Nevada, from point north of Horse Corral Meadows. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02532 ID. Gilbert, G.K. 2532 Big Meadow Plateau, Sierra Nevada, from point north of Horse Corral Meadows. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02533 ID. Gilbert, G.K. 2533 Shallow cirque on north face of Big Meadow Plateau, Sierra Nevada, from trail near Lost Meadow. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02534 ID. Gilbert, G.K. 2534 Shallow cirque on north face of Big Meadow Plateau, Sierra Nevada, from trail near Lost Meadow. Fresno County, California. 1904. #1:/Gilbert1904-Gilbert G.K. Collection/ggk02535 ID. Gilbert, G.K. 2535 The series of views 2535 to 2547 represent the west, or Canadian, cliff of the Niagara Gorge, as seen from a series of stations at top of cliff on the American side. The stations are lettered A to H on accompanying map, and were occupied on August and September 1904. This photo is from station A, the camera being directed S. 80 degrees W. Overlaps no. 2536. Ontario, Canada. n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02536 ID. Gilbert, G.K. 2536 North 60 degrees West from Station A. See no 2535. Overlaps nos. 2535 and 2537. Ontario, Canada.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02537 ID. Gilbert, G.K. 2537 North 10 West from Station A. (See no. 2535. Overlaps nos. 2536 and 2538). Ontario, Canada.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02538 ID. Gilbert, G.K. 2538 North 20 degrees East from Station A. (See no. 2535. Overlaps no. 2537). Ontario, Canada.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02539 ID. Gilbert, G.K. 2539 West from Station B. (See 2535). Ontario, Canada, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02540 ID. Gilbert, G.K. 2540 South 70 degrees West from Station C. (See 2535. Overlaps no. 2541). Ontario, Canada, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02541 ID. Gilbert, G.K. 2541 North 70 degrees West from Station C. (See no. 2535. Overlaps no. 2540). Ontario, Canada, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02542 ID. Gilbert, G.K. 2542 South 70 West from Station D. (See no. 2535). Ontario, Canada.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02543 ID. Gilbert, G.K. 2543 South 60 degress West from Station E. (See no. 2535). Ontario, Canada.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02544 ID. Gilbert, G.K. 2544 South 60 degress West from Station E. (See no. 2535). Ontario, Canada.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02545 ID. Gilbert, G.K. 2545 Down Niagara River from Station G. (See no. 2535). Ontario, Canada, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02546 ID. Gilbert, G.K. 2546 From Station H. (See no. 2535. Overlaps no. 2547). Ontario, Canada.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02547 ID. Gilbert, G.K. 2547 From Station H. (See no. 2535 Overlaps no. 2546). Ontario, Canada, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02548 ID. Gilbert, G.K. 2548 Part of north side of St. Davids quarry. The Niagara escarpment begins a few rods beyond the fence. The Lockport limestone is here glaciated (see nos. 2551 to 2553), and a few feet of till rest on the glaciated surface. The view shows a preplacial cavity in the limestone. Ontario, Canada, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02549 ID. Gilbert, G.K. 2549 Preglacial weathering of Lockport limestone at St. Davids quarry. The general relations are shown in no. 2548, Ontario. Canada.n.d. #1:/Gilbert1898-Gilbert G.K. Collection/ggk02550 ID. Gilbert, G.K. 2550 Weathering, probably preglacial, of Lockport Limestone in St. Davids quarry, Canada. Province of Ontario, Canada. 1898. #1:/Gilbert1898-Gilbert G.K. Collection/ggk02551 ID. Gilbert, G.K. 2551 Glaciated surface of Lockport Limestone in St. Davids quarry, Canada, near locality of pre-glacial weathering shown in photo nos. 2548 and 2549. Shows also crescentic gouges. Province of Ontario, Canada. 1898. #1:/Gilbert1898-Gilbert G.K. Collection/ggk02552 ID. Gilbert, G.K. 2552 Glaciated furrow in Lockport Limestone in St. Davids quarry, Canada. The right wall of furrow is exposed. The left wall has been removed to back of quarry near workman. In the development of the quarry this furrow has been traced 200 yards from the edge of the Niagara escarpment. Province of Ontario, Canada. 1898. #1:/Gilbert1898-Gilbert G.K. Collection/ggk02553 ID. Gilbert, G.K. 2553 Glaciated furrow in Lockport Limestone at St. Davids quarry, Canada. Province of Ontario, Canada. 1898. #1:/Gilbert1898-Gilbert G.K. Collection/ggk02554 ID. Gilbert, G.K. 2554 Surface of Lockport Limestone exposed in old water channel between Dufferin Islands, Niagara Falls. Province of Ontario. Canada. 1898 #1:/Gilbert1898-Gilbert G.K. Collection/ggk02555 ID. Gilbert, G.K. 2555 Surface of Lockport Limestone exposed in old water channel between Dufferin Islands, Niagara Falls. Province of Ontario, Canada. 1898. #1:/Gilbert1898-Gilbert G.K. Collection/ggk02556 ID. Gilbert, G.K. 2556 Surface of Lockport Limestone exposed in old water channel between Dufferin Islands, Niagara Falls. Province of Ontario, Canada. 1898. #1:/Gilbert1898-Gilbert G.K. Collection/ggk02557 ID. Gilbert, G.K. 2557 Surface of Lockport Limestone exposed in old water channel between Dufferin Islands, Niagara Falls. Province of Ontario, Canada. 1898. #1:/Gilbert1898-Gilbert G.K. Collection/ggk02558 ID. Gilbert, G.K. 2558 Surface of Lockport Limestone exposed in old water channel between Dufferin Islands, Niagara Falls. Province of Ontario, Canada. 1898. #1:/Gilbert1898-Gilbert G.K. Collection/ggk02559 ID. Gilbert, G.K. 2559 Peculiar structure of Lockport Limestone exposed by quarrying in bed of old channels between Dufferin Islands, Niagara Falls. Province of Ontario, Canada. 1898. #1:/Gilbert1898-Gilbert G.K. Collection/ggk02560 ID. Gilbert, G.K. 2560 Surface of Lockport Limestone in bed of old channel between Dufferin Islands, Niagara Falls. Province of Ontario, Canada. 1898. #1:/New York/ggk02561 ID. Gilbert, G.K. 2561 New York. Peculiar structure of Lockport Limestone exposed in an excavation at Niagara Falls. 1898. #1:/New York/ggk02562 ID. Gilbert, G.K. 2562 New York. Peculiar structure of Lockport Limestone exposed in an excavation at Niagara Falls. 1898. #1:/New York/ggk02563 ID. Gilbert, G.K. 2563 New York. Peculiar structure of Lockport Limestone exposed in an excavation at Niagara Falls. 1898. #1:/New York/ggk02564 ID. Gilbert, G.K. 2564 New York. Peculiar structure of Lockport Limestone exposed in an excavation at Niagara Falls. 1898. #1:/New York/ggk02565 ID. Gilbert, G.K. 2565 New York. Peculiar structure of Lockport Limestone exposed in an excavation at Niagara Falls. 1898. #1:/Gilbert1898-Gilbert G.K. Collection/ggk02566 ID. Gilbert, G.K. 2566 Curved slab of Lockport Limestone from bed of old channel between Dufferin Islands, Niagara Falls. Shows surface markings, (One-half natural size). Province of Ontario, Canada. 1898. #1:/Gilbert1905-Gilbert G.K. Collection-Cherokee Mine/ggk02567 ID. Gilbert, G.K. 2567 The Cherokee mine (hydraulic). Butte County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection-Cherokee Mine/ggk02568 ID. Gilbert, G.K. 2568 Working face of Cherokee mine. Sand and gravel, capped by lava. Butte County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection-Cherokee Mine/ggk02569 ID. Gilbert, G.K. 2569 Cherokee mine. Bedrock surface exposed in foreground. Butte County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection-Old Hydraulic Mine/ggk02570 ID. Gilbert, G.K. 2570 Old hydraulic mine, right bank of Feather River, opposite Oroville. Butte County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection-Old Hydraulic Mine/ggk02571 ID. Gilbert, G.K. 2571 Old hydraulic mine, right bank of Feather River, opposite Oroville. Butte County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection-Old Hydraulic Mine/ggk02572 ID. Gilbert, G.K. 2572 Feather River, from bluff opposite Oroville. Gold dredge in center. Old hydraulic mine at right. Oroville stands on a river terrace; the camera on a higher one. Butte. County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection-Old Hydraulic Mine/ggk02573 ID. Gilbert, G.K. 2573 Old hydraulic mine, Placerville. Bedrock in foreground, gravels beyond. The terrace is a resurrected land surface on which the gravels were deposited. El Dorado County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection-Old Hydraulic Mine/ggk02574 ID. Gilbert, G.K. 2574 Working face of old hydraulic mine at Placerville. Gravels capped by volcanic breccia. El Dorado County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection-Old Hydraulic Mine/ggk02575 ID. Gilbert, G.K. 2575 Old hydraulic mine, Placerville. The section is breccia above, gravel below. On the floor of the mine are stacked large boulders. El Dorado County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection-Old Hydraulic Mine/ggk02576 ID. Gilbert, G.K. 2576 Old hydraulic mine, Placerville. The section is breccia above, gravel below. On the flow of the mine are stacked large boulders. El Dorado County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection-Old Hydraulic Mine/ggk02577 ID. Gilbert, G.K. 2577 Bedrock surface exposed by removal of auriferous gravels, old hydraulic mine near Placerville. El Dorado County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection-Old Hydraulic Mine/ggk02578 ID. Gilbert, G.K. 2578 Bedrock surface exposed by removal of auriferous gravels, old hydraulic mine near Placerville. The surface has the form of a stream valley ("channel" of the miners), and this valley trends differently from the modern drainage. El Dorado County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02579 ID. Gilbert, G.K. 2579 Birds-eye view of Placerville. The upland, except hill at right, belongs to a peneplain younger than the auriferous gravels. El Dorado County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02580 ID. Gilbert, G.K. 2580 Birds eye view of Placerville. The upland, except the hill at right, belongs to a peneplain younger than the auriferous gravels. The distant profile is the top of a lava bed. El Dorado County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02581 ID. Gilbert, G.K. 2581 Peneplain near Placerville. El Dorado County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02582 ID. Gilbert, G.K. 2582 Westward from hill near Placerville. The middle distance is occupied by a peneplain, to which the extreme distance is monad-nock. Old hydraulic mines in foreground. El Dorado County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02583 ID. Gilbert, G.K. 2583 Limestone sculptured by solution, Columbia. Exposed by placer mining. Tuolumne County, California. 1905. (Panorama with photo no. 2584) #1:/Gilbert1905-Gilbert G.K. Collection/ggk02584 ID. Gilbert, G.K. 2584 Limestone sculptured by solution, Columbia. Exposed by placer mining. Tuolumne County, California. 1905. (Panorama with photo no. 2583) #1:/Gilbert1905-Gilbert G.K. Collection/ggk02585 ID. Gilbert, G.K. 2585 Limestone sculptured by solution, Columbia. Exposed by placer mining. Tuolumne County, California, 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02586 ID. Gilbert, G.K. 2586 Limestone sculptured by solution, Columbia. Exposed by placer mining. Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02587 ID. Gilbert, G.K. 2587 Limestone sculptured by solution, Columbia. Exposed by placer mining. Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02588 ID. Gilbert, G.K. 2588 Limestone sculptured by solution, Columbia, Exposed by placer mining. Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02589 ID. Gilbert, G.K. 2589 Limestone sculptured by solution, Columbia. Exposed by placer mining. Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02590 ID. Gilbert, G.K. 2590 Limestone sculptured by solution, Columbia. Exposed by placer mining. Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02591 ID. Gilbert, G.K. 2591 Limestone sculptured by solution, Columbia. Exposed by placer mining. Tuolumne County, California, 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02592 ID. Gilbert, G.K. 2592 Coloma Valley where gold was discovered in California. El Dorado County, California, 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02593 ID. Gilbert, G.K. 2593 South Fork of American River, downstream from Coloma. El Dorado County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02594 ID. Gilbert, G.K. 2594 South Fork of American River, upstream from Coloma. El Dorado County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02595 ID. Gilbert, G.K. 2595 Statue of Marshall, discoverer of gold, Coloma. El Dorado County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02596 ID. Gilbert, G.K. 2596 Statue of Marshall, discoverer of gold, Coloma. El Dorado County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02597 ID. Gilbert, G.K. 2597 Statue of Marshall, Coloma. El Dorado County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02598 ID. Gilbert, G.K. 2598 Old hydraulic mine, Douglasflat. Calaveras County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection-Old Hydraulic Mine/ggk02599 ID. Gilbert, G.K. 2599 The nearby hill is dump of hydraulic mine shown in photo no, 2598, Calavaras County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02600 ID. Gilbert, G.K. 2600 Timbucktoo. The valley beyond the village is a Tertiary "channel" re-excavated by hydraulic mining. Its course is across modern drainage. Yuba County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02601 ID. Gilbert, G.K. 2601 Tertiary valley resurrected by hydraulic mining. Timbucktoo, Yuba County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02602 ID. Gilbert, G.K. 2602 Nevada City, Nevada County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02603 ID. Gilbert, G.K. 2603 Up American River from bridge at Folsom City. The inner gorge divides a terrace cut from bedrock. The horizontal line is artificial. Sacramento County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02604 ID. Gilbert, G.K. 2604 Down American River from bridge at Folsom City. The bedrock series ends in the foreground. The terraces beyond are composed of interbedded sand, gravel, and volcanics. Sacramento County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02605 ID. Gilbert, G.K. 2605 Channel of American River near Folsom City, The lower terraces are of hydraulic tailings first deposited by the river and afterwards partly removed. Sacramento County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02606 ID. Gilbert, G.K. 2606 Placer tailings, Folsom City, Sacramento County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02607 ID. Gilbert, G.K. 2607 Placer tailings, Folsom City. Sacramento County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02608 ID. Gilbert, G.K. 2608 "Second bottom" of Mokelumne River from high terrace near Lockeford. San Joaquin County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02609 ID. Gilbert, G.K. 2609 Eastward from Copper Peak, Stanislaus Basin, The crags are characteristic of the tuff-breccias of the region. Dardanelles quadrangle, Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02610 ID. Gilbert, G.K. 2610 Lava crest west of Relief Valley, Stanislaus Basin. Granite in foreground. A large Pleistocene glacier traversed the valley from left to right, but its sculpture has been greatly modified by later weathering. Dardanelles quadrangle, Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02611 ID. Gilbert, G.K. 2611 Meadow south of Cooper Meadow, South Fork of Stanislaus River, body of lava fills a valley in granite. Dardanelles quadrangle, Tuolumne County, California. 1905. (Panorama with photo no. 2612) #1:/Gilbert1905-Gilbert G.K. Collection/ggk02612 ID. Gilbert, G.K. 2612 Meadow south of Cooper Meadow, South Fork of Stanislaus River, body of lava fills a valley in granite. Dardanelles quadrangle, Tuolumne County, California. 1905. (Panorama with photo no. 2611) #1:/Gilbert1905-Gilbert G.K. Collection/ggk02613 ID. Gilbert, G.K. 2613 Relief Pass. Lava rests on an uneven surface of granite. Dardanelles quadrangle, Tuolumne County, California. 1905. (Panorama with photo no. 2614) #1:/Gilbert1905-Gilbert G.K. Collection/ggk02614 ID. Gilbert, G.K. 2614 Relief Pass. Lava rests on an uneven surface of granite. Dardanelles quadrangle, Tuolumne County, California. 1905. (Panorama with photo no. 2613) #1:/Gilbert1905-Gilbert G.K. Collection/ggk02615 ID. Gilbert, G.K. 2615 Granite Dome from the northwest. Cirques. Tuolumne County, California. 1905. (Panorama with photo no. 2616) #1:/Gilbert1905-Gilbert G.K. Collection/ggk02616 ID. Gilbert, G.K. 2616 Granite Dome from the northwest. Cirques. Tuolumne County, California. 1905. (Panorama with photo no. 2615) #1:/Gilbert1905-Gilbert G.K. Collection/ggk02617 ID. Gilbert, G.K. 2617 Summit of Granite Dome from the northwest. The darker rock at right is a volcanic remnant. Dardanelles quadrangle, Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02618 ID. Gilbert, G.K. 2618 Part of north face of Granite Dome. The smooth summit above snow bank is a remnant of volcanic rock. Dardanelles quadrangle, Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02619 ID. Gilbert, G.K. 2619 Part of north face of Granite Dome. Dardanelles quadrangle, Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02620 ID. Gilbert, G.K. 2620 Northeastward from Granite Dome. The rock-basin lake is in granite. The visible parts of the ridges beyond are of volcanic rock. Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02621 ID. Gilbert, G.K. 2621 East side of upper Relief Valley, showing a glacier quarry; a place where a Pleistocene glacier eroded granite chiefly by plucking. The glacier moved from right to left. Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02622 ID. Gilbert, G.K. 2622 West face of volcanic ridge between Relief Creek and Grouse Creek, Middle Fork of Stanislaus River. The chief rock is a firm volcanic breccia. The paler rock forming the highest peak is intrusive in the breccia. Dardanelles quadrangle, Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02623 ID. Gilbert, G.K. 2623 North wall of Kennedy Lake valley, a glacial trough, basin of Middle Fork of Stanislaus River. The visible rocks are volcanic, the valley erosional. Dardanelles quadrangle, Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02624 ID. Gilbert, G.K. 2624 Kennedy Lake. The gleaming rocks beyond the lake are granite, all others volcanic. Hanging valleys above the granite. Dardanelles quadrangle, Tuolumne County, California, 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02625 ID. Gilbert, G.K. 2625 South wall of Kennedy Lake valley. Dardanelles quadrangle, Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02626 ID. Gilbert, G.K. 2626 Valley joining Kennedy Lake valley from the south. The cirques are in volcanic rock, Dardanelles quadrangle, Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02627 ID. Gilbert, G.K. 2627 Valley joining Kennedy Lake valley from the south. Dardanelles quadrangle, Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02628 ID. Gilbert, G.K. 2628 A mountain torrent, snow fed. Dardanelles quadrangle, Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02629 ID. Gilbert, G.K. 2629 Hanging valley in ridge between Grouse Creek and East Fork of Relief Creek. Volcanic rock (dark) rests on granite (white). Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02630 ID. Gilbert, G.K. 2630 Yuba levee, 3 1/2 miles from Marysville. At the left the bed of Yuba River; at right, the plain protected from overflow. Yuba County, California. 1905. (Panorama with photo no. 2631) #1:/Gilbert1905-Gilbert G.K. Collection/ggk02631 ID. Gilbert, G.K. 2631 Yuba levee, 3 1/2 miles from Marysville. At the left the bed of Yuba River; at right, the plain protected from overflow. Yuba County, California. 1905. (Panorama with photo no. 2630) #1:/Gilbert1905-Gilbert G.K. Collection/ggk02632 ID. Gilbert, G.K. 2632 Inner face of Yuba levee. Yuba County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02633 ID. Gilbert, G.K. 2633 Outer face of Yuba levee from bed of Yuba River. Yuba County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02634 ID. Gilbert, G.K. 2634 Bermuda grass on Yuba levee. Yuba County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02635 ID. Gilbert, G.K. 2635 Reclamation Service gage on Yuba River near Smartsville. Cable and car. Yuba County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02636 ID. Gilbert, G.K. 2636 Narrows of Yuba River near Smartsville, looking up from gaging station. Yuba County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02637 ID. Gilbert, G.K. 2637 Up Yuba River from Parks Bar bridge. Yuba County, California. June 6, 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02638 ID. Gilbert, G.K. 2638 Down Yuba River from Parks Bar bridge. Yuba County, California. June 6, 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02639 ID. Gilbert, G.K. 2639 Oaks drowned by gravel, bed of Yuba River near Parks Bar bridge. Yuba County, California. June 6, 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02640 ID. Gilbert, G.K. 2640 Bed of Yuba River above Daguerre Point from south bank. Yuba County, California. June 6, 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02641 ID. Gilbert, G.K. 2641 Bed of Yuba River below Daguerre Point from south bank. Dredging ground at right. Yuba County, California. June 6, 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02642 ID. Gilbert, G.K. 2642 Bed of Yuba River below Daguerre Point from Daguerre Point. Yuba County, California, August 22, 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02643 ID. Gilbert, G.K. 2643 Bed of Yuba River above Barrier. Yuba County (?), California. June 6, 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02644 ID. Gilbert, G.K. 2644 Bed of Yuba River below Barrier. Yuba County (?), California. June 6, 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02645 ID. Gilbert, G.K. 2645 "Barrier No. 1," Yuba River. The water flows over part of dam built in 1904. The piles are part of the addition of 1905. Yuba County (?), California. June 6, 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02646 ID. Gilbert, G.K. 2646 "Barrier No. l," Yuba River. Construction further advanced than in photo no. 2645. Yuba County (?), California. August 22, 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02647 ID. Gilbert, G.K. 2647 Face of dam ("Barrier No. 1") after floods of 1904.-05. Concrete scoured by transported debris. Pile head (foreground) more resistant than concrete. Yuba County (?), California. August 22, 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02648 ID. Gilbert, G.K. 2648 Westward from the dam. Yuba County (?), California. August 22, 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02649 ID. Gilbert, G.K. 2649 Middle Fork of Stanislaus River above Hells Half Acre. California. August 1, 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02650 ID. Gilbert, G.K. 2650 Hells Half Acre, Middle Fork of Stanislaus River. California. August 1, 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02651 ID. Gilbert, G.K. 2651 Middle Fork of Stanislaus River one-half mile below McCormicks crossing. Big Trees quadrangle, Tuolumne County, California. July 29, 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02652 ID. Gilbert, G.K. 2652 Boulders in bar of Stanislaus River near Collierville. Big Trees quadrangle, Calavaras County, California. July 29, 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02653 ID. Gilbert, G.K. 2653 Stanislaus River at Parrott bridge. Big Trees quadrangle, Tuolumne County, California. July 25, 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02654 ID. Gilbert, G.K. 2654 Stanislaus River at Malone (Robinson ferry). Big Trees quadrangle, Calaveras County, California. July 13, 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02655 ID. Gilbert, G.K. 2655 Up Stanislaus Canyon from near Collierville. Even sky line due to flow of volcanic breccia. Big Trees quadrangle, Calaveras County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02656 ID. Gilbert, G.K. 2656 Up Stanislaus Canyon from near Collierville. Big Trees quadrangle, Galaveras County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02657 ID. Gilbert, G.K. 2657 Down Stanislaus Canyon from near Collierville. Big Trees quadrangle, Calaveras County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02658 ID. Gilbert, G.K. 2658 "Cloud Lake," an enlargement of a slough, Stockton. San Joaquin County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02659 ID. Gilbert, G.K. 2659 Stockton slough, straightened and deepened by dredging. San Joaquin County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02660 ID. Gilbert, G.K. 2660 San Joaquin River below Stockton slough. San Joaquin County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02661 ID. Gilbert, G.K. 2661 San Joaquin River below Stockton slough. San Joaquin County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02662 ID. Gilbert, G.K. 2662 Mouth of Calaveras River (?. (San Joaquin County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02663 ID. Gilbert, G.K. 2663 San Joaquin River halfway between its mouth and Stockton. San Joaquin County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02664 ID. Gilbert, G.K. 2664 San Joaquin River between its mouth and Stockton. San Joaquin County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02665 ID. Gilbert, G.K. 2665 Tule lands and tidal slough between Suisun and Benicia. Solana County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02666 ID. Gilbert, G.K. 2666 Overflowed land near Knights Landing, Sacramento Valley. Yolo County, California. June 3, 1905. #1:/Gilbert1905-Gilbert G.K. Collection-Old Hydraulic Mine/ggk02667 ID. Gilbert, G.K. 2667 Old hydraulic mine and dump, canyon of Stanislaus River near Parrott bridge. The tailings are said to have been arrested by a brush dam, which afterwards gave way. Big Trees quadrangle, Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02668 ID. Gilbert, G.K. 2668 Brush and timber dam to restrain hydraulic mine tailings, Wedge Gulch, near Vallecita. Big Trees quadrangle, Calaveras County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02669 ID. Gilbert, G.K. 2669 Cone of hydraulic tailings on Wedge Gulch, The tailings were partly caught by a restraining dam, and the mass afterward eroded when the dam gave out. Big Trees quadrangle, Calaveras County, California. 1905. Published as plate 5-A in U.S. Geological Survey. Professional paper 105, 1917. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02670 ID. Gilbert, G.K. 2670 Mormon Creek, foot of Table Mountain, near Tuttletown road. A deposit of hydraulic mine tailings (held by brush dam?) has been partly eroded, leaving a terrace. Butte County, California. June 1, 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02671 ID. Gilbert, G.K. 2671 Placer tailings in small ravine near Parrott bridge, Stanialaus River. Big Tree quadrangle, Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02672 ID. Gilbert, G.K. 2672 Normal graded slope in pine forest, 3,800 feet altitude, Shafers ranch, Stanislaus. Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02673 ID. Gilbert, G.K. 2673 Vegetal cover of trees, brushes, and grass; and accordant slopes. Near Placerville. A trail has caused an arroyo at left, and other (stock) trails are seen in middle distance. The timber was cut from this area several decades ago. El Dorado County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02674 ID. Gilbert, G.K. 2674 Land slopes near Placerville. El Dorado County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02675 ID. Gilbert, G.K. 2675 Land slopes near Placerville. El Dorado County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02676 ID. Gilbert, G.K. 2676 Land slopes at head of Coloma Valley. Canyon walls of American River contrasted with valley slopes and rounded summits. El Dorado County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02677 ID. Gilbert, G.K. 2677 Rounded hills near Miles. Los Angeles County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02678 ID. Gilbert, G.K. 2678 Tar weed near Colfax. Placer County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02679 ID. Gilbert, G.K. 2679 Litter of leaves and twigs under manzanita on a slope of about 10 degrees. California, ca. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02680 ID. Gilbert, G.K. 2680 Irrigated meadow on steep slope near Timbucktoo. On this slope the water of irrigation is completely diffused. Yuba County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02681 ID. Gilbert, G.K. 2681 Gullying of bedrock hill in consequence of overgrazing, near Colfax. Placer County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02682 ID. Gilbert, G.K. 2682 Gullying in bedrock hill in consequences of overgrazing, near Colfax. Placer County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02683 ID. Gilbert, G.K. 2683 Gullies developed as a result of overgrazing. Mono road near Mill Creek. Dardanelles quadrangle, Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02684 ID. Gilbert, G.K. 2684 Gullies developed as a result of overgrazing. Mono road near Mill Creek. Dardanelles quadrangle, Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02685 ID. Gilbert, G.K. 2685 Gully developed in natural meadow as result of overgrazing, Genness ranch, Mono road. Big Trees quadrangle, Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02686 ID. Gilbert, G.K. 2686 Gully developed in natural meadow as result of overgrazing, Genness ranch, Mono road. Big Trees quadrangle, Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02687 ID. Gilbert, G.K. 2687 Gully started by trail descending a gentle slope, Colfax. Placer County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02688 ID. Gilbert, G.K. 2688 Erosion on cattle trails where they descend a hillside. California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02689 ID. Gilbert, G.K. 2689 Erosion on a horse trail in upper part of oak belt. The deepening of the right-hand trail led to the shifting of the line of gravel. California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02690 ID. Gilbert, G.K. 2690 Sunken roadway on gentle slope near Nevada City. Nevada County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02691 ID. Gilbert, G.K. 2691 Sunken roadway on gentle slope near Nevada City. Nevada County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02692 ID. Gilbert, G.K. 2692 Sunken roadway on gentle slope near Nevada City. Nevada County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02693 ID. Gilbert, G.K. 2693 Traction engine with train of empty cars, Mono road, near Sonora. Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02694 ID. Gilbert, G.K. 2694 Traction engine with train of empty cars, Mono road, near Sonora. Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02695 ID. Gilbert, G.K. 2695 Traction engine with train of empty cars, Mono road, near Sonora. Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02696 ID. Gilbert, G.K. 2696 Mono road near Confidence. The dust ground up by the traffic is removed by the air. Big Trees quadrangle, Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02697 ID. Gilbert, G.K. 2697 Mono road near Confidence. The dust ground up by the traffi is removed by the air. Big Trees quadrangle, Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02698 ID. Gilbert, G.K. 2698 Mono road near Confidence. The dust ground up by the traffic is removed by the air. Big Trees quadrangle, Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02699 ID. Gilbert, G.K. 2699 Mono road near Confidence. The dust ground up by the traffic is removed by the air. Big Trees quadrangle, Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02700 ID. Gilbert, G.K. 2700 A dusty road near Marysville. Dust raised by hoofs and wheels floats away on the air, and the roadbed is thus eroded. Yuba County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02701 ID. Gilbert, G.K. 2701 Road near Sonora. Ditches made to protect the road from wash are enlarged to gullies. Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02702 ID. Gilbert, G.K. 2702 Road near Sonora, Ditches made to protect the road from wash are enlarged to gullies. Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02703 ID. Gilbert, G.K. 2703 Road near Sonora. Ditches made to protect the road from wash are enlarged to gullies. Tuolumne County, California, 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02704 ID. Gilbert, G.K. 2704 Upper reservoir on South Fork of Stanislaus River. A glacial rock basin naturally occupied by a meadow. Big Trees quadrangle, Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02705 ID. Gilbert, G.K. 2705 Upper reservoir on South Fork of Stanislaus River. A glacial rock basin naturally occupied by a meadow. Big Trees quadrangle, Tuolumne County, California, 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02706 ID. Gilbert, G.K. 2706 Upper reservoir on South Fork of Stanislaus River. A glacial rock basin naturally occupied by a meadow. Big Trees quadrangle, Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02707 ID. Gilbert, G.K. 2707 Serrate or dentate outcrops of slate, foothills of Sierra Nevada near Smartsville. Yuba County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02708 ID. Gilbert, G.K. 2708 Columnar structure, Middle Fork of Stanislaus River, above mouth of Eagle Creek. Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02709 ID. Gilbert, G.K. 2709 Banded granite one mile south of Cooper Meadow. In the dark bands hornblende abounds. Dardanelles quadrangle, Tuolumne County, California. 1905. #1:/Glacier Bay National Park and Preserve/ggk0270a ID. Gilbert, G.K. 270a Glacier Bay National Park and Preserve, Alaska. Front of Muir Glacier, viewed from the east. Morse Glacier in the distance. Harriman Expedition, June 9, 1899. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02710 ID. Gilbert, G.K. 2710 Contact between banded granite and a gray granite with many inclusions, one mile south of Cooper Meadow, The gray granite traversed the banded as a broad dike. The inclusions are of a plutonic rock. Dardanelles quadrangle, Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02711 ID. Gilbert, G.K. 2711 Granite with inclusions 2 miles west of Cooper Meadow. The inclusions are of a darker rock, apparently plutonic. The granite is characterized by large phenocrysts of feldspar. The box is 7 1/2" long. Dardanelles quadrangle, Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02712 ID. Gilbert, G.K. 2712 (General Collection 2300) Granite with inclusions 2 miles west of Cooper Meadow. Dardanelles quadrangle, Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02713 ID. Gilbert, G.K. 2713 Granite with inclusions 2 miles west of Cooper Meadow. Dardanelles quadrangle, Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02714 ID. Gilbert, G.K. 2714 Granite with inclusions 2 miles west of Cooper Meadow. Dardanelles quadrangle, Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02715 ID. Gilbert, G.K. 2715 Granite with inclusions, Herring , above reservoir on trail to Cooper Meadow. The inclusions are flattened by flow. Dardanelles quadrangle, Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02716 ID. Gilbert, G.K. 2716 Smoothly curved hilltop carved from slate without reference to structure, near Tuttletown. Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02717 ID. Gilbert, G.K. 2717 Section of slate in railway cut near Tuttletown. Shows cleavage, curved joints, and quartz veins; also, hill sculpture independent of rock structure. Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02718 ID. Gilbert, G.K. 2718 Shore lines in minature made by waves on a sloping bank of sand at the edge of the American River, near Folsom. Sacramento County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02719 ID. Gilbert, G.K. 2719 A gold dredge at work, Oroville. Butte County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02720 ID. Gilbert, G.K. 2720 Carrier of gold dredge in operation, Oroville. Butte County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02721 ID. Gilbert, G.K. 2721 Ridges of coarse gravel built by gold dredge, Oroville. Butte County, California. 1905. (Panorama with photo no. 2722) #1:/Gilbert1905-Gilbert G.K. Collection/ggk02722 ID. Gilbert, G.K. 2722 Panorama with photo no, 2721. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02723 ID. Gilbert, G.K. 2723 Boulder of decomposition, exposed at Nevada City by the removal of Tertiary gravels by hydraulic mining. The bedrock beneath the gravels is a decomposed granite with residuary boulders of unaltered granite. The boulders weather by exfoliation, and grade into their matrix through a sectile zone with concentric structure. This view shows boulder, matrix, and a distant cliff of gravel. Nevada County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02724 ID. Gilbert, G.K. 2724 Boulder of decomposition; a symmetric spheroid with sectile selvage. A fracture shows the compact interior. Nevada County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02725 ID. Gilbert, G.K. 2725 Boulders of decomposition showing exfoliation. Nevada County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02726 ID. Gilbert, G.K. 2726 Boulders of decomposition and matrix. Nevada County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02727 ID. Gilbert, G.K. 2727 Boulders of decomposition and matrix. Nevada County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02728 ID. Gilbert, G.K. 2728 Boulders of decomposition in situ. Change of form at a certain contour suggests exposure above that line to Tertiary weathering or wear. Nevada County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02729 ID. Gilbert, G.K. 2729 Boulders of decomposition. The relation of the two suggests that they were once united and a traversing crack guided subsequent decomposition. Nevada County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02730 ID. Gilbert, G.K. 2730 Boulders of decomposition showing exfoliation. Nevada County, California, 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02731 ID. Gilbert, G.K. 2731 Boulder of decomposition and matrix with transition zone. Nevada County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02732 ID. Gilbert, G.K. 2732 Boulder of decomposition, or possibly a residuary apophysis developed in a similar manner. Nevada County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02733 ID. Gilbert, G.K. 2733 Boulders of decomposition. Nevada County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02734 ID. Gilbert, G.K. 2734 Topographic forms developed by aqueous erosion in a nearly homogenous material, decomposed granite. Some of the minature gorges were probably initiated by shrinkage cracks. Nevada City. Nevada County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02735 ID. Gilbert, G.K. 2735 Topographic forms developed by aqueous erosion in a nearly homogeneous material, decomposed granite. Some of the minature gorges were probably initiated by shrinkage cracks. Nevada City, Nevada County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02736 ID. Gilbert, G.K. 2736 Topographic forms developed by aqueous erosion in a nearly homogeneous material, decomposed granite. Some of the minature gorges were probably initiated by shrinkage cracks. Nevada City, Nevada County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02737 ID. Gilbert, G.K. 2737 (General Collection 18) Topographic forms developed by aqueous erosion in a nearly homegeneous material, decomposed granite. Some of the minature gorges were probably initiated by shrinkage cracks. Nevada City, Nevada County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection-Cherokee Mine/ggk02738 ID. Gilbert, G.K. 2738 Channel in bedrock, a slate of moderate strength, worn by tailings of Cherokee hydraulic mine in eight years gross time. The net period is estimated at less than two years. Depth of channel 10 feet. Butte County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection-Cherokee Mine/ggk02739 ID. Gilbert, G.K. 2739 Channel in bedrock, a slate of moderate strength, worn by tailings of Cherokee hydraulic mine in eight years gross time. The net period is estimated at less than two years. Depth of channel 10 feet. Butte County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02740 ID. Gilbert, G.K. 2740 Oak near Marysville. Yuba County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02741 ID. Gilbert, G.K. 2741 Oaks east of Marysville, illustrating their regular habit in the Great Valley of California. Yuba County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02742 ID. Gilbert, G.K. 2742 Oak near Murphy. Calaveras County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02743 ID. Gilbert, G.K. 2743 Digger pine between Marysville and Smartsville. Yuba County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02744 ID. Gilbert, G.K. 2744 Mountain pine (P. monticola) near Cooper Meadow. Altitude 8,400 feet. Dardanelles quadrangle, Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02745 ID. Gilbert, G.K. 2745 Hemlock near Cooper Meadow. Altitude 8,400 feet. Dardanelles quadrangle, Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02746 ID. Gilbert, G.K. 2746 Hemlock near Cooper Meadow. Altitude 8,400 feet. Dardanelles quadrangle, Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02747 ID. Gilbert, G.K. 2747 Juniper, Relief Valley. Altitude 8,200 feet. Dardanelles quadrangle, Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02748 ID. Gilbert, G.K. 2748 Juniper near Kennedy Lake. Altitude 8,000 feet. Dardanelles quadrangle, Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02749 ID. Gilbert, G.K. 2749 False Hellebore near Cooper Meadon. Altitude 8,800 feet. Dardanelles quadrangle, Tuolumne County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02750 ID. Gilbert, G.K. 2750 South Yuba River, Sierra Nevada, downstream from Purdon bridge, Smartsville quadrangle, Nevada County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02751 ID. Gilbert, G.K. 2751 South Yuba River, Sierra Nevada, upstream from Purdon bridge. Smartsville quadrangle, Nevada County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02752 ID. Gilbert, G.K. 2752 South Yuba River, Sierra Nevada, upstream from Purdon bridge, Smartsville quadrangle, Nevada County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02753 ID. Gilbert, G.K. 2753 South Yuba River, Sierra Nevada, upstream from bridge at Bridgeport. Smartsville quadrangle, Nevada County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02754 ID. Gilbert, G.K. 2754 South Yuba River, Sierra Nevada, downstream from Jones Bar bridge. Smartsville quadrangle, Nevada County, California, 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02755 ID. Gilbert, G.K. 2755 South Yuba River, Sierra Nevada, upstream from Jones Bar bridge. Smartsville quadrangle, Nevada County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02756 ID. Gilbert, G.K. 2756 Middle Yuba River, Sierra Nevada, upstream from Freemans bridge. Smartsville quadrangle, Yuba County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02757 ID. Gilbert, G.K. 2757 Middle Yuba River, Sierra Nevada, downstream from Freemans bridge, Smartsville quadrangle, Yuba County, California, 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02758 ID. Gilbert, G.K. 2758 "Barrier No. 1," Yuba River. Yuba County (?), California. October 13, 1905. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02759 ID. Gilbert, G.K. 2759 "Barrier No. 1," Yuba River. Yuba County (?), California. January 17, 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02760 ID. Gilbert, G.K. 2760 "Barrier No. 1," Yuba River. Yuba County (?), California. January 17, 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02761 ID. Gilbert, G.K. 2761 "Barrier No. 1," Yuba River. Yuba County (?), California. January 21, 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02762 ID. Gilbert, G.K. 2762 Up Yuba River from south abutment of "Barrier No.1." Shows newly formed bar, Yuba County (?), California. January 21, 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02763 ID. Gilbert, G.K. 2763 An embayment of the south base of Marysville Buttes. Illustrates aggradation by local drainage (because of rising base level) and degradation along the stream line, as a result of agriculture and grazing. Sutter County, California. 1906. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02764 ID. Gilbert, G.K. 2764 Embayment of south base of Marysville Buttes, Sutler County, California, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02765 ID. Gilbert, G.K. 2765 Penn Valley, a mature valley east of Smartsville, lying 1000 feet above the South Yuba, 5 miles away. Smartsville quadrangle, Yuba County, California.n.d. #1:/Gilbert1905-Gilbert G.K. Collection-Old Hydraulic Mine/ggk02766 ID. Gilbert, G.K. 2766 Hydraulic mine, North San Juan, Bedrock in foreground; auriferous gravel in bluff, Nevada County, California, 1905. #1:/Gilbert1905-Gilbert G.K. Collection-Old Hydraulic Mine/ggk02767 ID. Gilbert, G.K. 2767 Hydraulic mine, North San Juan, Bedrock in foreground; auriferous gravel in bluff. Nevada County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection-Manzanita Mine/ggk02768 ID. Gilbert, G.K. 2768 Manzanita mine, near Sweetland. The distant hills are beyond the Middle Yuba. Smartsville quadrangle, Nevada County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection-Manzanita Mine/ggk02769 ID. Gilbert, G.K. 2769 Manzanita mine, near Sweetland. Smartsville quadrangle, Nevada County, California. 1905. Published as plate 10-A in U.S. Geological Survey. Professional paper 105. 1917. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02770 ID. Gilbert, G.K. 2770 Hydraulic mine near Birchville. This mine is a pit drained by a tunnel to Middle Yuba River. Smartsville quadrangle, Nevada County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02771 ID. Gilbert, G.K. 2771 Hydraulic mine at Moores Flat, Kiddle Yuba River, Nevada County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02772 ID. Gilbert, G.K. 2772 Consolidated mine (hydraulic), North Columbia ("Columbia Hill"), Nevada County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection-Laird Mine/ggk02773 ID. Gilbert, G.K. 2773 Laird mine (hydraulic), North Columbia, Nevada County, California. 1905. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02774 ID. Gilbert, G.K. 2774 Shady Creek, a tributary of South Yuba River. Downstream from near bridge 2 miles above mouth. The creek valley is flooded by tailings from hydraulic mines. Smartsville quadrangle, Nevada County, California, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02775 ID. Gilbert, G.K. 2775 Terrace on Middle Yuba River 2 miles below Freemans bridge. The channel was filled by tailings from North San Juan hydraulic mines and afterward cleared out except this bank. Smartsville quadrangle, Nevada County, California.n.d. #1:/Gilbert1905-Gilbert G.K. Collection-North Columbia Hydraulic Mines/ggk02776 ID. Gilbert, G.K. 2776 Crib dam on Spring Creek, built to restrain tailings from North Columbia hydraulic mines. Nevada County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection-North Columbia Hydraulic Mines/ggk02777 ID. Gilbert, G.K. 2777 Brush dam on Spring Creek, built to restrain tailings from North Columbia hydraulic mines. Nevada County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02778 ID. Gilbert, G.K. 2778 Tailings on Spring Creek. Compare 2772, 2777, 2780. Nevada County, California. 1905. Published as plate 8-A in U.S. Geological Survey. Professional paper 105. 1917. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02779 ID. Gilbert, G.K. 2779 Tailings on Spring Creek. Compare 2777. Nevada County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02780 ID. Gilbert, G.K. 2780 Tailings on Spring Creek. Compare 2777. Nevada County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02781 ID. Gilbert, G.K. 2781 Tailings on Spring Creek. Talus cones at base of bluff. Nevada County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02782 ID. Gilbert, G.K. 2782 Delta at head of Faucherie Lake. This delta was built by the inlet stream after the conversion of the lake into a reservoir. Nevada County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02783 ID. Gilbert, G.K. 2783 Bowman Lake Reservoir near principal inlet. Relation of surface to stumps shows deposit of sediment to be small. See no. 2824. Nevada County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02784 ID. Gilbert, G.K. 2784 English Reservoir. In use 1871 to 1883. Deposit very small. Nevada County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02785 ID. Gilbert, G.K. 2785 Blair Reservoir, near North Bloomfield. Intake, and remnant sedimentary filling, which has been sluiced out. Nevada County, California. 1905. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02786 ID. Gilbert, G.K. 2786 Delta in "Upper French" Reservoir, near North San Juan, Nevada County, California.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02787 ID. Gilbert, G.K. 2787 Pine needles protecting ground from wash, near North San Juan. P. ponderosa; altitude 2200 feet. Nevada County, California, n.d. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02788 ID. Gilbert, G.K. 2788 Sloping clay ground in pasture, Marysville Buttes. The vegetal cover is scant, but prevents wash. Sutter County, California. September 25, 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02789 ID. Gilbert, G.K. 2789 Field hear electric railway power house between Nevada City and Grass Valley. The soil is being washed away. Nevada County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02790 ID. Gilbert, G.K. 2790 Field near electric railway power house between Nevada City and Grass Valley. The soil is being washed away. Nevada County, California. 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02791 ID. Gilbert, G.K. 2791 Field near Colfax. Down-hill plowing. Light litter of stubble, etc. No evidence of washing. Placer County, California. November 1905. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02792 ID. Gilbert, G.K. 2792 Vineyard near Colfax after storm of January 12-19, 1906. No soil wash. Compare 2793. Placer County, California, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02793 ID. Gilbert, G.K. 2793 Another part of vineyard shown in photo no. 2792. The gully is the work of a single storm. Placer County, California, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02794 ID. Gilbert, G.K. 2794 Cultivated field near Colfax. The gully was made by the storm of January 12-19, 1906. Placer County, California, n.d. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02795 ID. Gilbert, G.K. 2795 Effect of storm (January 12-19, 1906) on field recently plowed and harrowed. Near Colfax, Placer County, California. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02796 ID. Gilbert, G.K. 2796 Effect of storm (January 12-19, 1906) on field recently plowed and harrowed. Near Colfax. The paler patches and the immediate foreground show deposits of earth washed from steeper slopes. Placer County, California. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02797 ID. Gilbert, G.K. 2797 Cultivated field near Colfax, The aggradation and degradation of the foreground are the work of one storm - January 12-19, 1906. Placer County, California, n.d. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02798 ID. Gilbert, G.K. 2798 Orchards near Colfax. During a heavy storm, January, 1906, the water ran nearly clear from this land. Placer County, California, n.d. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02799 ID. Gilbert, G.K. 2799 A roadside in Colfax suffers waste because of deforestation and overgrazing. Placer County, California. 1906. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02800 ID. Gilbert, G.K. 2800 Grazing land on south slope of Marysville Buttes. The thalwegs are gullied but not the steep hillslopes. Sutter County, California. September 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02801 ID. Gilbert, G.K. 2801 Grazing land, south part of Marysville Buttes. Gullies from soil waste on steep slopes. The rock is volcanic. Sutter County, California. September 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02802 ID. Gilbert, G.K. 2802 Aggradation on irrigated pasture near Bridgeport. Altitude 800 feet. Laterals from a small ditch (not shown), depositing silt on their banks, have built ridges, on which they run. Nevada County, California, 1905. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02803 ID. Gilbert, G.K. 2803 Gully made by drainage from a road. Near French Corral, Nevada County, California, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02804 ID. Gilbert, G.K. 2804 Gully made by drainage from a road. Near French Corrall, Nevada County, California, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02805 ID. Gilbert, G.K. 2805 Road on timbered plateau near Snow Tent. Altitude 4500 feet. Illustrates soil waste. Nevada County, California. 1905. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02806 ID. Gilbert, G.K. 2806 Road near North San Juan. Altitude 2000 feet. Illustrates soil waste. Nevada County, California. 1905. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02807 ID. Gilbert, G.K. 2807 Roadside gully near Colfax, Placer County, California, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02808 ID. Gilbert, G.K. 2808 Erosion by water from broken flume near Bowman Lake. Snowslides have repeatedly broken the flume, turning its water on the talus. Nevada County, California, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02809 ID. Gilbert, G.K. 2809 Sculpture of earth slope by impact of rain drops. The wind blew from right to left, ascending the slope obliquely. California, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02810 ID. Gilbert, G.K. 2810 Sculpture of earth slope by impact of rain drops. The wind blew from right to left, ascending the slope obliquely. California, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02811 ID. Gilbert, G.K. 2811 Sculpture of earth slope by impact of rain drops. The wind blew from the position of camera, ascending the slope. California, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02812 ID. Gilbert, G.K. 2812 Sculpture of earth slope by impact of rain drops. The wind blew from the position of the camera, ascending the slope. California, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02813 ID. Gilbert, G.K. 2813 Sculpture of earth slope by impact of rain drops. The wind blew from the position of the camera, ascending the slope. Shows the protective influence of pebbles and pine needles. California, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02814 ID. Gilbert, G.K. 2814 Oak (Quercus lobata), Feather River bridge, near Gridley, Butte County, California, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02815 ID. Gilbert, G.K. 2815 Aspens deformed by pressure of snow. Near Bowman Lake. Altitude 6,000 feet. The downward limit of foliage is due to browsing by sheep. Nevada County, California, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02816 ID. Gilbert, G.K. 2816 Badland topography, North San Juan. Altitude 1,800 feet. The material is decomposed granite, in situ, exposed by hydraulic mining. Compare 2734-2737. Nevada County, California, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02817 ID. Gilbert, G.K. 2817 Badland topography, North San Juan. Altitude 1,800 feet. The material is decomposed granite, in situ, exposed by hydraulic mining. Compare 273-2737. Nevada County, California, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02818 ID. Gilbert, G.K. 2818 Badland topography, North San Juan. Altitude 1,800 feet. The material is decomposed granite, in situ, exposed by hydraulic mining. Compare 273-2737. Nevada County, California, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02819 ID. Gilbert, G.K. 2819 Badland topography, North San Juan. Altitude 1,800 feet. The material is decomposed granite, in situ, exposed by hydraulic mining. Compare 273-2737. Nevada County, California, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02820 ID. Gilbert, G.K. 2820 Stream sculpture on granite, Rock Creek, 3 miles north of Nevada City, Nevada County, California, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02821 ID. Gilbert, G.K. 2821 Smoke stratum, valley of Deer Creek at Nevada City. In the foreground is a pit from hydraulic mining. The smooth skyline marks a dissected plateau of andesitic lava. Nevada County, California. 8 a.m., October 28, 1905. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02822 ID. Gilbert, G.K. 2822 Bedrock surface, of slate, exposed in preparing foundation for south abutment of"Barrier No. 1", Yuba River. Compare 2707. Yuba County (?), California, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02823 ID. Gilbert, G.K. 2823 Boss of unaltered granite, originally embedded in decomposed granite. Related to "bowlder of decomposition". Compare 3724-3732. Nevada City, Nevada County, California, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02824 ID. Gilbert, G.K. 2824 French Lake. No sediment visible. Compare 2782, 2783. Nevada County, California, n.d. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02825 ID. Gilbert, G.K. 2825 Land near Butte Slough, southwest of Marysville Buttes, overflowed and eroded in February, 1904. Sutter County, California. Photo September 1905. #1:/Gilbert1905-Gilbert G.K. Collection/ggk02826 ID. Gilbert, G.K. 2826 Levee on east bank of Sacramento River north of Meridian. The river is beyond sycamore trees at left. Sutter County, California. 1905. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02827 ID. Gilbert, G.K. 2827 "Barrier No. 1", Yuba River. Compare 2761. Yuba County, California. January 21, 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02828 ID. Gilbert, G.K. 2828 "Barrier No. 1", Yuba River. Compare 2761. Yuba County, California. January 21, 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02829 ID. Gilbert, G.K. 2829 "Barrier Mo. 1", Yuba River. Compare 2761. Yuba County, California. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02830 ID. Gilbert, G.K. 2830 Head erosion, 3 miles northwest of Mount Tamalpais. The plain is now pastured. In its natural condition it was marshy "tule land". The head erosion of gullies is by surface and ground waters, in cooperation, and is conditioned by turf. Compare 2833. Tamalpais quadrangle, Marin County, California. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02831 ID. Gilbert, G.K. 2831 Head erosion, 3 miles northwest of Mount Tamalpais. See 2830. Tamalpais quadrangle, Marin County, California. 1906, #1:/Gilbertnd-Gilbert G.K. Collection/ggk02832 ID. Gilbert, G.K. 2832 Head erosion, 3 miles northwest of Mount Tamalpais. See 2830. Tamalpais quadrangle, Marin County, California, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02833 ID. Gilbert, G.K. 2833 Head erosion, 3 miles northwest of Mount Tamalpais. See 2830. Tamalpais quadrangle, Marin County, California, n.d. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02834 ID. Gilbert, G.K. 2834 Gully developing headward by sapping and modified by slipping. Two miles southeast of Mount Tamalpais. A characteristic landslip hollow at right. Compare 2835. Tamalpais quadrangle, Marin County, California. 1906. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02835 ID. Gilbert, G.K. 2835 Gully developing by head erosion and slipping. For a different view see no. 2834. Tamalpais quadrangle, Marin County, California, n.d. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02836 ID. Gilbert, G.K. 2836 Gullies developing by head erosion. Two miles southeast of Mount Tamalpais, Tamalpais quadrangle, Marin County, California. 1906. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02837 ID. Gilbert, G.K. 2837 Cattle trails on turfy slope near Redwood Canyon, south of Mount Tamalpais, Tamalpais quadrangle, Marin County, California, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02838 ID. Gilbert, G.K. 2838 Cattle trails on turfy slope near Redwood Canyon, south of Mount Tamalpais, Tamalpais quadrangle, Marin County, California, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02839 ID. Gilbert, G.K. 2839 Erosion on foot trail, south slope of Mount Tamalpais, A new trail is developing at left. Tamalpais quadrangle, Marin County, California, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02840 ID. Gilbert, G.K. 2840 Manzanita, south slope of Mount Tamalpais, Tamalpais quadrangle, Marin County, California.n.d. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02841 ID. Gilbert, G.K. 2841 San Francisco, California, Earthquake April 18, 1906. Main fault between Point Reyes Station and Olema. View is southeast. The ground at the right of the fault has moved toward the observer; the ground at the left has moved from the observer. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02842 ID. Gilbert, G.K. 2842 San Francisco, California, Earthquake April 18, 1906. Main fault 2 miles north of Olema. View is northwest. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02843 ID. Gilbert, G.K. 2843 San Francisco, California, Earthquake April 18, 1906. Main fault between Olema and Point Reyes Station. View is southeast. The apparent upthrow is chiefly due to the combination of horizontal throw with slope. The knob touched by the fault is a topographic feature created by earlier movements of the same sort. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02844 ID. Gilbert, G.K. 2844 San Francisco, California, Earthquake April 18, 1906. Main fault 2 miles south of Dickinson's Ranch, south of Olema. View is southeast. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02845 ID. Gilbert, G.K. 2845 San Francisco, California, Earthquake April 18, 1906. Effects along the fault trace. The fault trace or fracture accompanying the earthquake is inconspicuous, although the horizontal displacement is considerable. The fence is offset 8.5 feet by the main fault half a mile northwest of Woodville. View is northeast. 1906. Plate 1-B, U.S. Geological Survey Bulletin 324. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02846 ID. Gilbert, G.K. 2846 San Francisco, California, Earthquake April 18, 1906. Effects along the fault trace. The fault trace or fracture accompanying the earthquake is inconspicuous, although the horizontal displacement is considerable. Road crossing the fault track near Point Reyes Station. View is southwest. The offset is 20 feet. The shear zone is 60 feet wide here and traverses a swamp. The road was raised above the swamp by an embankment. Between the limits of the shear zone, this embankment settled to the general level of the swamp, about 3.5 feet. April 28, 1906. Plate 1-A, U.S. Geological Survey Bulletin 324. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02847 ID. Gilbert, G.K. 2847 San Francisco, California, Earthquake April 18, 1906. Road crossing near Point Reyes Station offset 20 feet. View is northeast. April 28, 1906. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02848 ID. Gilbert, G.K. 2848 California earthquake. Main fault 2 miles north of Olema, looking northwest. Marin County, California, n.d. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02850 ID. Gilbert, G.K. 2850 San Francisco, California, Earthquake April 18, 1906. Pond on the line of the main fault near Bondietti's, between Olema and Woodville. View is northwest. The fault rift follows the shore of the pond at the left and is seen beyond. The trough containing the pond and the ridge at the left of it are ascribed to earlier movements on the same fault plane. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02851 ID. Gilbert, G.K. 2851 San Francisco, California, Earthquake April 18, 1906. Pond on the line of the main fault near Bondietti's, between Olema and Woodville. View is southeast. The fault scarp of 1906 follows the right bank of the pond; the crack in foreground is a subordinate feature. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02852 ID. Gilbert, G.K. 2852 San Francisco, California, Earthquake April 18, 1906. South on the road 1 mile north of Bolinas. The system of cracks collectively constitute a branch on the southwest side of the main fault. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02853 ID. Gilbert, G.K. 2853 San Francisco, California, Earthquake April 18, 1906. Grouped cracks in the "second valley" of Inverness. The ground is alluvial, and the distribution of cracks is related to the form and boundaries of the alluvial deposits. #1:/Point Reyes National Seashore/ggk02854 ID. Gilbert, G.K. 2854 Point Reyes National Seashore, California. Cracks divergent from the main fault near Skinner Ranch. 1906. Photo taken after the San Francisco earthquake of April 18, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02855 ID. Gilbert, G.K. 2855 San Francisco, California, Earthquake April 18, 1906. Cracking and subsidence of a road grade across a marsh southwest of Point Reyes Station. Figure 60, U.S. Geological Survey Professional Paper 993. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02856 ID. Gilbert, G.K. 2856 San Francisco, California, Earthquake April 18, 1906. Road crack caused by the settling of faulted ground at the outer edge of a side hill road 1 mile northwest of Inverness. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02857 ID. Gilbert, G.K. 2857 San Francisco, California, Earthquake April 18, 1906. Road crack on the west shore of Tomales Bay south of Inverness. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02858 ID. Gilbert, G.K. 2858 San Francisco, California, Earthquake April 18, 1906. Cracks generated by lateral spreading southwest of Point Reyes Station. The fault trace is beyond the fence. The ground lurched toward the marsh of Bear Valley Creek. 1906. Figure 59, U.S. Geological Survey Professional Paper 993. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02859 ID. Gilbert, G.K. 2859 California earthquake. Secondary cracks near edge of swamp one mile southwest of Olema. Marin County, California. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02860 ID. Gilbert, G.K. 2860 San Francisco, California, Earthquake April 18, 1906. Secondary cracks on the shore of Bolinas Lagoon. Plate 4-A, U.S. Geological Survey Bulletin 324; Figure 55, U.S. Geological Survey Professional Paper 993. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02861 ID. Gilbert, G.K. 2861 San Francisco, California, Earthquake April 18, 1906. Earthquake-generated ridges on a tidal flat at Tomales Bay. View is east. April 28, 1906. Plate 8-A, U.S. Geological Survey Bulletin 324; Figure 61, U.S. Geological Survey Professional Paper 993. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02862 ID. Gilbert, G.K. 2862 California earthquake. Second view of no. 2861 made May 8, 1906, at higher stage of tide. Marin County, California. May 8, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02863 ID. Gilbert, G.K. 2863 San Francisco, California, Earthquake April 18, 1906. Shifted bottom of Tomales Bay. 1906. Portion of Plate 7-A, U.S. Geological Survey Bulletin 324; Figure 62, U.S. Geological Survey Professional Paper 993. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02864 ID. Gilbert, G.K. 2864 San Francisco, California, Earthquake April 18, 1906. Edge of a new shoal at Tomales Bay. View is northeast. 1906. Plate 7-B, U.S. Geological Survey Bulletin 324. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02865 ID. Gilbert, G.K. 2865 California earthquake. Earthquake ridge and tidal marsh head of Tomales Bay, looking east. Compare no. 2861. Marin County, California. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02866 ID. Gilbert, G.K. 2866 San Francisco, California, Earthquake April 18, 1906. Cracks and settlement at the head of the lateral spread between Olema and Inverness. 1906. Figure 58, U.S. Geological Survey Professional Paper 993. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02867 ID. Gilbert, G.K. 2867 San Francisco, California, Earthquake April 18, 1906. Hillside landslide in a road cut about 2 miles west of Inverness. Figure 65, U.S. Geological Survey Professional Paper 993. #1:/Gilbert1906-Gilbert G.K. Collection-San Francisco Earthquake April 18, 1906/ggk02868 ID. Gilbert, G.K. 2868 Hillside flow failure 2 miles west of Inverness and 1 mile south of Sunshine Ranch. A hillside bog was set in motion by the shock and flowed down the slope as a stream of mud. Marin County, California. 1906. Published as figure 64 in U.S. Geological Survey. Historic Ground Failures in Northern California Triggered by Earthquakes. Professional paper 993. 1978. San Francisco Earthquake April 18, 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02869 ID. Gilbert, G.K. 2869 California earthquake. Oak overturned by earthquake, Bear Valley, one-half mile west of main fault. Marin County, California. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02870 ID. Gilbert, G.K. 2870 San Francisco, California, Earthquake April 18, 1906. Buckle in an iron water pipe at Inverness. View is northwest. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02871 ID. Gilbert, G.K. 2871 San Francisco, California, Earthquake April 18, 1906. Secondary cracks on filled land on Bluxom Street near Sixth Street. View is west. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02872 ID. Gilbert, G.K. 2872 San Francisco, California, Earthquake April 18, 1906. Northwest on Ninth Street, viewed from near Grant Street. Assuming the tracks to have been originally straight, there was settling in the foreground and movement toward the right. 1906. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02873 ID. Gilbert, G.K. 2873 California earthquake. Southeastward on Fifth Street from Harrison Street, San Francisco. Assuming the rails to have been originally straight and of uniform grade, their bends are the result of earthquake changes. San Francisco County, California, n.d. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02874 ID. Gilbert, G.K. 2874 San Francisco, California, Earthquake April 18, 1906. Scarps and right lateral displacements caused by lateral spreading at two points on Bryant Street near the intersection of Ninth Street, between Eighth and Ninth Streets. 1906. Figure 39-B, U.S. Geological Survey Professional Paper 993. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02875 ID. Gilbert, G.K. 2875 San Francisco, California, Earthquake April 18, 1906. Scarps and right lateral displacements caused by lateral spreading at two points on Bryant Street between Ninth and Tenth Streets(?). 1906. Figure 39-A, U.S. Geological Survey Professional Paper 993. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02876 ID. Gilbert, G.K. 2876 San Francisco, California, Earthquake April 18, 1906. Along Ninth Street between Bryant and Brannan Streets. Damage at the northwest end of the block. Undulation and fissuring of pavement and sidewalks. Houses over the trough have been dropped from their underpinnings. 1906. Portion of Figure 40-D, U.S. Geological Survey Professional Paper 993. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02877 ID. Gilbert, G.K. 2877 San Francisco, California, Earthquake April 18, 1906. Along Ninth Street between Bryant and Brannan Streets. Results of earthflow on Ninth Street. 1906. Plate 5, U.S. Geological Survey Bulletin 324; Figure 40-A, U.S. Geological Survey Professional Paper 993. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02878 ID. Gilbert, G.K. 2878 San Francisco, California, Earthquake April 18, 1906. Northeast on Brannan Street at the corner of Ninth Street. The scarp and settlement in the foreground marks the southern boundary of the ground failure on Ninth Street. 1906. Figure 40-D, U.S. Geological Survey Professional Paper 993. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02879 ID. Gilbert, G.K. 2879 San Francisco, California, Earthquake April 18, 1906. Buckling of the rails by compression on Howard Street (Van Ness Avenue) near Seventeenth Street. 1906. Plate 6-B, U.S. Geological Survey Bulletin 324; Figure 43, U.S. Geological Survey Professional Paper 993. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02880 ID. Gilbert, G.K. 2880 San Francisco, California, Earthquake April 18, 1906. Rails on Fifth Street near Harrison Street pulled apart by extensional movements associated with the lateral spreading of underlying sediments. 1906. Figure 34, U.S. Geological Survey Professional Paper 993. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02881 ID. Gilbert, G.K. 2881 San Francisco, California, Earthquake April 18, 1906. Harrison Street near Sixth Street. The rails of the nearer track were buckled by expansion from the heat of burning buildings. It also caused exfoliation of the paving blocks. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02882 ID. Gilbert, G.K. 2882 San Francisco, California, Earthquake April 18, 1906. Buckled curbstone on Capp Street near Eighteenth Street. Buckling was caused by sediments shifting toward the old channel of Mission Creek. 1906. Figure 47, U.S. Geological Survey Professional Paper 993. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02883 ID. Gilbert, G.K. 2883 San Francisco, California, Earthquake April 18, 1906. South on Waller Street; a small buckle of asphalt pavement. The corner house is shifted eastward with racking of the lower story. The underlying formation is sand. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02884 ID. Gilbert, G.K. 2884 San Francisco, California, Earthquake April 18, 1906. Rotated chimney at Berkeley. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02885 ID. Gilbert, G.K. 2885 San Francisco, California, Earthquake April 18, 1906. Demolished and broken chimneys at Berkeley. The cloud is smoke from fires in San Francisco. 10:00 a.m., April 18, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02886 ID. Gilbert, G.K. 2886 San Francisco, California, Earthquake April 18, 1906. Steeple and wall damage to the First Baptist Church in Oakland. 1906. See also photo ggk02887. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02887 ID. Gilbert, G.K. 2887 San Francisco, California, Earthquake April 18, 1906. Steeple and wall damage to the First Baptist Church in Oakland. 1906. See also photo ggk02886. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02888 ID. Gilbert, G.K. 2888 San Francisco, California, Earthquake April 18, 1906. Wall failure at the Imperial Home Bake building in Oakland. Before noon, April 18, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02889 ID. Gilbert, G.K. 2889 San Francisco, California, Earthquake April 18, 1906. Wall failure to the building containing Oakland Cyclery and J.A. Munro & Co., Auctioneers. Before noon, April 18, 1906, Oakland. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02890 ID. Gilbert, G.K. 2890 San Francisco, California, Earthquake April 18, 1906. Wall failure of the Collins Brothers Druggists building and the adjacent building in Oakland. Before noon, April 18, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02891 ID. Gilbert, G.K. 2891 San Francisco, California, Earthquake April 18, 1906. Failure of the upper part of a wall and a corner of the Central Bank Building in Oakland. Before noon, April 18, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02892 ID. Gilbert, G.K. 2892 San Francisco, California, Earthquake April 18, 1906. East side of Howard Street between Seventeenth and Eighteenth Streets. House shifted left on its foundation 25 inches. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02893 ID. Gilbert, G.K. 2893 San Francisco, California, Earthquake April 18, 1906. East side of Howard Street near Seventeenth Street. All houses shifted toward the left. The tall house dropped from its south foundation wall and leaned against its neighbor. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02894 ID. Gilbert, G.K. 2894 San Francisco, California, Earthquake April 18, 1906. Ruined house on Shotwell Street. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02895 ID. Gilbert, G.K. 2895 California earthquake. House one mile northwest of Bolinas. Stands on alluvial fan of Bolinas Creek. Was moved southward on fa. In the foreground is a secondary crack. Marin County, California. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02896 ID. Gilbert, G.K. 2896 San Francisco, California, Earthquake April 18, 1906. Buildings tipped into the water at the Bolinas waterfront. April 26, 1906. Figure 57, U.S. Geological Survey Professional Paper 993. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02897 ID. Gilbert, G.K. 2897 San Francisco, California, Earthquake April 18, 1906. Wrecked store in Bolinas. April 26, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02898 ID. Gilbert, G.K. 2898 San Francisco, California, Earthquake April 18, 1906. Schoolhouse at Point Reyes Station. The building was shifted southward 29 inches at this corner. April 1906. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02899 ID. Gilbert, G.K. 2899 San Francisco, California, Earthquake April 18, 1906. Destroyed bridge at Olema. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02900 ID. Gilbert, G.K. 2900 San Francisco, California, Earthquake April 18, 1906. Sunshine Ranch 2 miles southwest of Inverness. The inclined building is a dairy; beyond it lies the ruin of a barn. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02901 ID. Gilbert, G.K. 2901 San Francisco, California, Earthquake April 18, 1906. Morgan house at Inverness. It stands on a mesa near a bluff overlooking Tomales Bay. It shifted westward and uphill. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02902 ID. Gilbert, G.K. 2902 San Francisco, California, Earthquake April 18, 1906. House in the "first valley" of Inverness, near the shore of the bay. 1906. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02903 ID. Gilbert, G.K. 2903 California earthquake. Residence of Mrs.E.S. Howard, Inverness, looking northwest. Marin County, California, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02904 ID. Gilbert, G.K. 2904 California earthquake. Two and one-half story house (Chamot), Inverness. The house fell to the left (west), crushing the lower story. Marin County, California, n.d. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02905 ID. Gilbert, G.K. 2905 San Francisco, California, Earthquake April 18, 1906. Schoolhouse(?) in the south part of Inverness. School desks and podium in the yard adjacent to it. Windows out of alignment and boards bracing the right side of building. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02906 ID. Gilbert, G.K. 2906 San Francisco, California, Earthquake April 18, 1906. Some toppled and shifted bathhouses. View is north across Tomales Bay from Inverness. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02907 ID. Gilbert, G.K. 2907 San Francisco, California, Earthquake April 18, 1906. Water tank on the west shore of Tomales Bay near Inverness shifted 4.5 feet westward. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02908 ID. Gilbert, G.K. 2908 San Francisco, California, Earthquake April 18, 1906. Water tank on the west shore of Tomales Bay near Inverness toppled westward. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02909 ID. Gilbert, G.K. 2909 San Francisco, California, Earthquake April 18, 1906. Upright water tank on the west shore of Tomales Bay near Inverness shifted west as its support failed. 1906. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02910 ID. Gilbert, G.K. 2910 California earthquake. Ruin of water tank and support near Inverness; tank fell westward. Compare 2907-09. Marin County, California, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02911 ID. Gilbert, G.K. 2911 California earthquake. Ruin of water tank on mesa, Inverness; tank stood in the shed and was thrown westward. Marin County, California, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02912 ID. Gilbert, G.K. 2912 Clam-shell dredge at work building levee. California, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02913 ID. Gilbert, G.K. 2913 Clam-shell dredge at work building leve, California.n.d. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02914 ID. Gilbert, G.K. 2914 Back levee, Pearson Reclamation District, showing back water from Sacramento River. The height of levee has been recently increased. California. April 3, 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02915 ID. Gilbert, G.K. 2915 Back levee, Pearson Reclamation District, showing back water from Sacramento Paver. The height of levee has been recently increased. California, April 3, 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02916 ID. Gilbert, G.K. 2916 Front levee of Pearson Reclamation District at Vorden. At right Sacramento River. Sacramento County, California. April 3, 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02917 ID. Gilbert, G.K. 2917 Front levee of Pearson Reclamation District at Vorden. At left Sacramento River. Sacramento County, California. April 3, 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02918 ID. Gilbert, G.K. 2918 Levee, left bank of Sacramento River between Rio Vista and Collinsville. Solana County, California. April 4, 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02919 ID. Gilbert, G.K. 2919 Sacramento River below Sacramento, showing levee and protected land. Sacramento County, California. April 3, 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02920 ID. Gilbert, G.K. 2920 Right bank of Sacramento River near Sacramento. The houses are on levee-protected land below the level of the water surface. Sacramento County, California. April 3, 1906. #1:/Gilbertnd-Gilbert G.K. Collection/ggk02921 ID. Gilbert, G.K. 2921 Group of young redwood trees. The old redwood trees send up suckers from the roots close to the trunk. After death of the old tree the young trees constitute a circular group. The next generation develops as a row of suckers just outside the first circle, and when the trees of the first circle have died these constitute a larger ring. California, n.d. #1:/Niagara Falls/ggk02922 ID. Gilbert, G.K. 2922 Niagara Falls, New York and Canada. Head of Goat Island and the American Rapids, viewed from the Tower Hotel. Circa 1896. #1:/Niagara Falls/ggk02923 ID. Gilbert, G.K. 2923 Niagara Falls, New York and Canada. American Falls, viewed from Prospect Point. Copy of a daguerreotype made circa 1855. #1:/Gilbert G.K. Collection-San Francisco Earthquake April 18, 1906/ggk02924 ID. Gilbert, G.K. 2924 Earthquake fault trace, between Shafter and Skinner ranches, Olema. Looking northwest. There has been a relative displacement of the ground at right and left of the trace amounting to about 15 feet. The ground at left moved from the observer and ground at right moved toward the observer. Marin County, California. 1906. San Francisco Earthquake April 18, 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02925 ID. Gilbert, G.K. 2925 California earthquake. Earthquake fault between Shafter and Skinner Ranches, Olema. The tree was thrown down at the time of the earthquake. Compare with 2924. Marin County, California. 1906. #1:/Point Reyes National Seashore/ggk02926 ID. Gilbert, G.K. 2926 Point Reyes National Seashore, California. Earthquake fault, north of Skinner Ranch near Olema, looking south. The vertical displacement is exaggerated by the slope of the ground toward the observer. 1906. Photo taken after the San Francisco earthquake of April 18, 1906. #1:/Point Reyes National Seashore/ggk02927 ID. Gilbert, G.K. 2927 Point Reyes National Seashore, California. Earthquake fault, north of Skinner Ranch near Olema, looking south. 1906. Photo taken after the San Francisco earthquake of April 18, 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02928 ID. Gilbert, G.K. 2928 California earthquake. Earthquake fault, north of Skinner Ranch, Olema, looking south. Compare with 2924. Marin County, California. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02929 ID. Gilbert, G.K. 2929 California earthquake. Earthquake fault, north of Skinner Ranch, Olema, looking south. Marin County, California. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02930 ID. Gilbert, G.K. 2930 California earthquake. General view of earthquake fault, looking north from point 2 miles north of Skinner Ranch, Olema; Tomales Bay in distance. The fault in the foreground crosses the lower slope of the hills. A minor branch runs farther up the slope. Marin County, California. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02931 ID. Gilbert, G.K. 2931 California earthquake. Earthquake fault, miles north of Skinner Ranch, Olema, looking north. Compare with 2924, 2932, 2933. Marin County, California. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02932 ID. Gilbert, G.K. 2932 California earthquake. Earthquake fault, 2 miles north of Skinner Ranch, Olema, looking north. Compare with 2924, 2931, 2933. Marin County, California, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02933 ID. Gilbert, G.K. 2933 San Francisco, California, Earthquake April 18, 1906. Fault trace 2 miles north of the Skinner Ranch at Olema. View is north. 1906. Plate 10, U.S. Geological Survey Folio 193; Plate 3-A, U.S. Geological Survey Bulletin 324. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02934 ID. Gilbert, G.K. 2934 Up Yuba River from dam (Barrier No. 1) near Smartsville. Shows bars created by last winter's flood. Smartsville quadrangle, Yuba County, California. September 19, 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02935 ID. Gilbert, G.K. 2935 Yuba River Dam. On the crest of the dam is a flashing of sand bags. Yuba County, California. September 19, 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02936 ID. Gilbert, G.K. 2936 Yuba River Dam. On the crest of the dam is a flashing of sand bags. Yuba County, California. September 19, 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02937 ID. Gilbert, G.K. 2937 Yuba River Dam. The track and car on the apron are for the purpose of carrying rock for riprap. Yuba County, California. September 19, 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02938 ID. Gilbert, G.K. 2938 Yuba River Dam, Shows riprap to protect toe of dam. Yuba County, California. September 19, 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02939 ID. Gilbert, G.K. 2939 Yuba River Darn. A broad area below the dam has been subject to scour, the bed of channel being lowered about 12 feet. Yuba County, California. September 19, 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02940 ID. Gilbert, G.K. 2940 Yuba River Dam. Shows area of channel reduced by scour. At left is portion of the original channel bed. Compare 2942. Yuba County, California. September 19, 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02941 ID. Gilbert, G.K. 2941 Yuba River Dam, near middle. The level of the river bed when the construction of the dam was begun was at the first terrace. Piles then driven into the gravel bed are now exposed for about 12 feet. A portion of the concrete apron which projected downstream beyond the line of piles has been undercut and destroyed. At right is riprap being added for the protection of the dam. Yuba County, California. September 19, 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02942 ID. Gilbert, G.K. 2942 Down Yuba River from the dam near Smartsville. The terrace of gravel at right was the bed of the channel previous to the construction of the dam. The modern channel is about 12 feet lower. Smartsville quadrangle, Yuba County, California. September 19, 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02943 ID. Gilbert, G.K. 2943 Characteristic outcrop of a schist in the lower foothills of the Sierra Nevada, on the road from Marysville to Smartsville. Yuba County, California. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02944 ID. Gilbert, G.K. 2944 End of spit separating Bolinas Lagoon from the ocean; seen from the bluff near Bolinas. An island partly seen at the left and another island in the distance are parts of an earlier spit which lies at a lower level. Marin County, California. September 27, 1906. (Panorama with photo no. 2945). #1:/Gilbert1906-Gilbert G.K. Collection/ggk02945 ID. Gilbert, G.K. 2945 End of spit separating Bolinas Lagoon from the ocean; seen from the bluff near Bolinas. An island partly seen at the left and another island in the distance are parts of an earlier spit which lies at a lower level. Marin County, California. September 27, 1906. (Panorama with photo no. 2944). #1:/Gilbert1906-Gilbert G.K. Collection/ggk02946 ID. Gilbert, G.K. 2946 California earthquake. Row of eucalyptus trees near Woodville. The trees were planted on the boundary between two large estates, the line trending northeast. An offset of 9 feet was produced by the earthquake fault of April 18, 1906. The three trees at left are on the southwest side of the fault, the others on the northwest side. Compare with 3029. Marin County(?), California. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02947 ID. Gilbert, G.K. 2947 California earthquake. Earthquake fault at point midway between Olema and Bolinas, looking southwest. The horizontal movement is shown by the offset in the fence, which has been repaired. The vertical movement is local and connected with the fact that the fault trace here follows a trough produced by previous dislocation. Marin County, California. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02948 ID. Gilbert, G.K. 2948 California earthquake. Earthquake fault near Bondietti's Ranch, between Olema and Bolinas. The fault trace is here on the southwest of a trough which contains several ponds, Marin County, California. 1906, #1:/Point Reyes National Seashore/ggk02849 ID. Gilbert, G.K. 2849 Point Reyes National Seashore, California. California earthquake. Main fault at the Skinner Ranch, one mile west of Olema, looking northwest. The fence had been repaired. The fault passes under the barn to the right of center. While the main part of the barn remained on its foundation, the shed on the right was dragged 15 feet due to the San Francisco earthquake of April 18, 1906. Mr. Harold W. Fairbanks. Marin County, California. May 12, 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02950 ID. Gilbert, G.K. 2950 California earthquake. Earthquake fault near Bondietti's Ranch, between Olema and Bolinas, looking west. The fault trace here follows the southwest side of a trough created by earlier displacements. This trough traverses a series of shallow drains descending to the southwest. One of these is shown. Marin County, California. 1906. (Panorama with photo no. 2951). #1:/Gilbert1906-Gilbert G.K. Collection/ggk02951 ID. Gilbert, G.K. 2951 California earthquake. Earthquake fault near Bondiette's Ranch, between Olema and Bolinas. The fault trace here follows a trough created by earlier dislocations. The trough appears in the foreground and can be traced toward the distance at the right. It interrupts a chain sloping from right to left. Marin County, California. 1906. (Panorama with photo no. 2950) #1:/Gilbert1906-Gilbert G.K. Collection/ggk02952 ID. Gilbert, G.K. 2952 California earthquake. Earthquake topography near Bondietti's Ranch, between Olema and Bolinas. The pond near the center of view and the notch in the skyline at right of fence belong to the same dislocation trough, Marin County, California, 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02953 ID. Gilbert, G.K. 2953 California earthquake. Earthquake topography south of Olema. The valley is a trough independent of drainage and ascribed to dislocations within recent time. The view looks southeast. Compare with 2954 2955. Marin County, California. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02954 ID. Gilbert, G.K. 2954 California earthquake. Earthquake topography south of Olema. The valley is a trough independent of drainage and ascribed to dislocations, within recent time. The view looks southeast. Compare with 2953 and 2955. Marin County, California. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02955 ID. Gilbert, G.K. 2955 California earthquake. Earthquake topography south of Olema. The valley is a trough independent of drainage and ascribed to dislocations within recent time. The view looks northwest. Compare with 2953 and 2954. Marin County, California. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02956 ID. Gilbert, G.K. 2956 California earthquake. Earthquake topography south of Olema. The valley is due to a dislocation in recent time and traverses the drainage. Its continuation forms a notch in the skyline. Marin County, California. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02957 ID. Gilbert, G.K. 2957 California earthquake. Secondary earthquake cracks in Bolinas. Marin County, California. 1906. Published as plate 4-B in U.S. Geological Survey. Bulletin 32. 1907, #1:/Gilbert1906-Gilbert G.K. Collection/ggk02958 ID. Gilbert, G.K. 2958 California earthquake. Secondary crack in reservoir embankment one-half mile north of Bolinas. In the distance, head of Bolinas Lagoon. Mr.S.S. Southworth of Bolinas. Marin County, California. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02959 ID. Gilbert, G.K. 2959 California earthquake. Southeastward along main earthquake rift where it enters Bolinas Lagoon. Marin County, California. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02960 ID. Gilbert, G.K. 2960 Landslip terrace about 5 miles south of Olema, on west side of ridge. See also 2962. Marin County, California. 1906. (Panorama with photo no. 2961). #1:/Gilbert1906-Gilbert G.K. Collection/ggk02961 ID. Gilbert, G.K. 2961 Landslip terrace about 5 miles south of Olema, on west side of ridge. See also 2962. Marin County, California. 1906. (Panorama with photo no. 2961). #1:/Point Reyes National Seashore/ggk02962 ID. Gilbert, G.K. 2962 Point Reyes National Seashore, California. Dislocation topography about 6 miles south of Olema on the west side of the ridge, looking south. The fresh faults, formed at the time of the San Francisco earthquake of April 18, 1906, occupy lines of earlier displacement. The region has a topography allied to landslip topography and also the earthquake zone between Olema and Bolinas. 1906. #1:/Point Reyes National Seashore/ggk02963 ID. Gilbert, G.K. 2963 Point Reyes National Seashore, California. Dislocation topography about 6 miles south of Olema on the west side of the ridge, looking south. The fresh faults, formed at the time of the San Francisco earthquake of April 18, 1906, occupy lines of earlier displacement. The region has a topography allied to landslip topography and also the earthquake zone between Olema and Bolinas. 1906. #1:/Point Reyes National Seashore/ggk02964 ID. Gilbert, G.K. 2964 Point Reyes National Seashore, California. Dislocation topography about 6 miles south of Olema on the west side of the ridge, looking south. The fresh faults, formed at the time of the San Francisco earthquake of April 18, 1906, occupy lines of earlier displacement. The region has a topography allied to landslip topography and also the earthquake zone between Olema and Bolinas. 1906. #1:/Point Reyes National Seashore/ggk02965 ID. Gilbert, G.K. 2965 Point Reyes National Seashore, California. Dislocation topography about 6 miles south of Olema on the west side of the ridge, looking south. The fresh faults, formed at the time of the San Francisco earthquake of April 18, 1906, occupy lines of earlier displacement. The region has a topography allied to landslip topography and also the earthquake zone between Olema and Bolinas. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02966 ID. Gilbert, G.K. 2966 A group of laurels shaped by the wind. The locality is southwest of Mount Tamalpais, about 3 miles from the coast. The view looks south-southeast. Marin County, California, ca. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02967 ID. Gilbert, G.K. 2967 Oaks and laurels shaped by the wind. The locality is southwest of Mount Tamalpais, about 3 miles from the coast. The view looks south-southeast. Marin County, California, ca. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02968 ID. Gilbert, G.K. 2968 Laurel trees shaped by the wind. The locality is southwest of Mount Tamalpais, about 3 miles from the coast. The view looks northeastward and Mount Tamalpais appears in the distance. Marin County, California. ca. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02969 ID. Gilbert, G.K. 2969 Forest litter under madrone tree, north slope of Mount Tamalpais. Marin County, California. ca. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02970 ID. Gilbert, G.K. 2970 Trail used by cattle and worn below the surface, east shore of Bolinas Lagoon. Marin County, California. ca. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02971 ID. Gilbert, G.K. 2971 Bolinas Lagoon, Bolinas peninsula from the east. The lagoon is separated from the shore by a sand spit appearing at the left. An earlier sand spit is partly preserved in islands. Marin County, California. ca. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02972 ID. Gilbert, G.K. 2972 Southern part of Bolinas Lagoon, seen from the eastern shore. A sand spit separates the lagoon from the ocean, and a remnant of an earlier-formed sand spit appears in the foreground. Marin County, California. ca. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02973 ID. Gilbert, G.K. 2973 Bolinas Lagoon, west from Morse ranch. The sand spit separating the lagoon from the ocean appears at the left. The island with tree is part of an earlier-formed sand spit. Marin County, California, ca. 1906. (Panorama with photo no. 2974) #1:/Gilbert1906-Gilbert G.K. Collection/ggk02974 ID. Gilbert, G.K. 2974 Bolinas Lagoon from the Morse ranch. Beyond the lagoon is a peninsula exhibiting an old marine plain. Marin County, California. ca. 1906. (Panorama with photo no. 2973) #1:/Gilbert1906-Gilbert G.K. Collection/ggk02975 ID. Gilbert, G.K. 2975 Stream and valley tributary to Bolinas Lagoon. In general the valley is a steep-sided gorge, but the lower part contains an alluvial filling adjusted to the lagoon surface as a base level. Marin County, California. ca. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02976 ID. Gilbert, G.K. 2976 San Francisco, California, Earthquake April 18, 1906. Pier and barn of the Dipsea Hotel at Bolinas Lagoon. View is northwest. Previous to this earthquake, the piles supporting the pier were vertical. The line of the earthquake fault is between the pier and the distant shore. Circa 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02977 ID. Gilbert, G.K. 2977 Reef near Bolinas at low tide. Duxbury Reef appears in the distance. Marin County, California. November 21, 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02978 ID. Gilbert, G.K. 2978 California earthquake. Reef near Bolinas at low tide. The calm patch on this reef is said to be more accessible than it was previous to the earthquake of April 18, 1906. Marin County, California. November 21, 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02979 ID. Gilbert, G.K. 2979 Looking southeast across the most easterly of the Duxbury Reefs. The surface of this reef is a product of marine planation, and so also is that of the Bolinas Reef. Marin County, California. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02980 ID. Gilbert, G.K. 2980 Bolinas Ridge from the southeast. Marin County, California. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02981 ID. Gilbert, G.K. 2981 Bolinas Ridge from the southeast. Marin County, California. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02982 ID. Gilbert, G.K. 2982 A westward spur of Bolinas Ridge overlooking Bolinas Bay. Marin County, California. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02983 ID. Gilbert, G.K. 2983 Tidal marsh east of Corte Madera, looking southeast. Illustrates the relation of the plane of the marsh to adjacent land topography. Marin County, California. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02984 ID. Gilbert, G.K. 2984 Tidal marsh from point north of Larkspur. Illustrates submergence of land topography by development of the marsh plain. Marin County, California. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02985 ID. Gilbert, G.K. 2985 Tidal marsh east of Larkspur, looking east. A land surface of varied topography is drowned by the marsh deposit, hilltops being left as islands. Marin County, California. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02986 ID. Gilbert, G.K. 2986 Tidal marsh east of Larkspur, looking east. A land surface of varied topography is drowned by marsh deposit, all hilltops being left as islands. Marin County, California. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02987 ID. Gilbert, G.K. 2987 Bolinas Lagoon from Bolinas at high tide. Marin County, California. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02988 ID. Gilbert, G.K. 2988 Bolinas Lagoon from Bolinas at low tide. Marin County, California. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02989 ID. Gilbert, G.K. 2989 Portion of Duxbury Reef near Bolinas. Marin County, California, ca. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02990 ID. Gilbert, G.K. 2990 California earthquake. Tidal flat ridged by earthquake at mouth of Lagunitas Creek, head of Tomales Bay. Marin County, California. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02991 ID. Gilbert, G.K. 2991 California earthquake. Tidal flat ridged by earthquake at mouth of Lagunitas Creek, head of Tomales Bay. This view looks north. Marin County, California. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02992 ID. Gilbert, G.K. 2992 California earthquake. Tidal flat at mouth of Lagunitas Creek, head of Tomales Bay. Marin County, California. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02993 ID. Gilbert, G.K. 2993 San Francisco, California, Earthquake April 18, 1906. Baily's pier at Inverness on the southwest shore of Tomales Bay. Previous to the earthquake, this pier was straight. Its present form is due partly to restoration after the earthquake, but chiefly to the shifting of mud constituting the bottom of the bay. During repair, it was found that the pier had been telescoped so as to be 12 feet shorter than before the earthquake. 1906. Figure 63-B, U.S. Geological Survey Professional Paper 993. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02994 ID. Gilbert, G.K. 2994 California earthquake. Baily's pier at Inverness. Marin County, California. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/ggk02995 ID. Gilbert, G.K. 2995 San Francisco, California, Earthquake April 18, 1906. Pier opposite a store at Inverness on the shore of Tomales Bay. Originally the pier was straight. Its outer end was carried northwestward during the shifting of the bay bottom. 1906. Figure 63-A, U.S. Geological Survey Professional Paper 993. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02996 ID. Gilbert, G.K. 2996 California earthquake. Pier opposite store at Inverness, southwest shore of Tomales Bay. The muddy bottom of the bay under outer end of pier shifted landward, giving to the supporting piles an inclined position. Marin County, California. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02997 ID. Gilbert, G.K. 2997 California earthquake. Earthquake fault between second and third valleys at Inverness. This is probably a branch of the main fault, the course of which is believed to traverse the bay in this neighborhood. The apparent vertical throw here is 2 1/2 feet, the horizontal throw about 4 feet. The ground at the right moved toward the camera, the ground at the left from the camera. Marin County, California. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk02998 ID. Gilbert, G.K. 2998 Outcrop of Monterey formation 1 mile east of the Claremont Hotel at Berkeley. Scale of central part is 1" to 6". The paler layers are chert; the darker layers are shale, Alameda County, California, ca. 1906. (Man is G.K. Gilbert) #1:/Gilbert1906-Gilbert G.K. Collection/ggk02999 ID. Gilbert, G.K. 2999 Outcrop of Monterey formation 1 mile east of the Claremont Hotel, Berkeley. Scale is 1" to 3 1/2'. The paler layers are chert; the darker layers are shale. Alameda County, California, ca. 1906. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03000 ID. Gilbert, G.K. 3000 Hillside with many landslides, Berkeley Hills, 2 miles southeast of Grizzly Peak. The hillside faces southwest. Alameda County, California. February 27, 1907. #1:/Gilbert1906-Gilbert G.K. Collection/ggk03001 ID. Gilbert, G.K. 3001 Richardson Bay, a branch of San Francisco Bay. Illustrates drowned topography, with development of wave cliffs on promontories, Marin County, California, ca. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk03002 ID. Gilbert, G.K. 3002 Oak tree Quercus wislizeni dwarfed and molded by wind; hill near Sausalito. The dominant wind was from the left (west). Marin County, California. ca. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk03003 ID. Gilbert, G.K. 3003 Live oaks modified in development by wind, near Sausalito. Controlling wind blew from right to left (west to east). The tree in foreground illustrates the influence of wind on the arrangement of branches, closeness of tree foliage, and smoothness of contour. At left is a group of trees showing adjustment of collective form. Marin County, California, ca. 1906. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03004 ID. Gilbert, G.K. 3004 Erosion of field on a northward slope 2 miles east of Berkeley. As the field had been plowed, sown, and harrowed, the erosive work of a few weeks is separate from all preceding erosion. Alameda County, California. February 27, 1907. #1:/San Francisco, California, Earthquake April 18, 1906/ggk03005 ID. Gilbert, G.K. 3005 San Francisco, California, Earthquake April 18, 1906. Freshly formed landslide on a northward slope at Berkeley Hills, 2 miles east of Berkeley. February 27, 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03006 ID. Gilbert, G.K. 3006 Freshly-formed landslide on a northward slope, Berkeley Hills, 2 miles east of Berkeley. Alameda County, California. February 27, 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03007 ID. Gilbert, G.K. 3007 Freshly-formed landslide on a northward slope, Berkeley Hills, 2 miles east of Berkeley. Alameda County, California. February 27, 1907. Published as plate 16-A in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03008 ID. Gilbert, G.K. 3008 Freshly-formed landslide on a northward slope, Berkeley Hills, 2 miles east of Berkeley. Alameda County, California. February 27, 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03009 ID. Gilbert, G.K. 3009 A landslide on the Such dairy farm in Strawberry Canyon, Berkeley Hills, 1 mile from the University of California. The movement began about March l6, 1907, and continued for two or three weeks. Head of Such landslide, Alameda County, California. March 26, 1907. (Panorama with photo nos. 3010-3012) #1:/Gilbert1907-Gilbert G.K. Collection/ggk03010 ID. Gilbert, G.K. 3010 A landslide on the Such dairy farm in Strawberry Canyon, Berkeley Hills, 1 mile from the University of California. The movement began about March l6, 1907, and continued for two or three weeks. Head of Such landslide, Alameda County, California. March 26, 1907. (Panorama with photo nos. 3009, 3011-3012). #1:/Gilbert1907-Gilbert G.K. Collection/ggk03011 ID. Gilbert, G.K. 3011 A landslide on the Such dairy farm in Strawberry Canyon, Berkeley Hills, 1 mile from the University of California. The movement began about March l6, 1907, and continued for two or three weeks. Head of Such landslide, Alameda County, California. March 26, 1907. (Panorama with photo nos. 3009-3010, 3012). #1:/Gilbert1907-Gilbert G.K. Collection/ggk03012 ID. Gilbert, G.K. 3012 A landslide on the Such dairy farm in Strawberry Canyon, Berkeley Hills, 1 mile from the University of California. The movement began about March l6, 1907, and continued for two or three weeks. Head of Such landslide, Alameda County, California. March 26, 1907. (Panorama with photo nos. 3009-3011). #1:/Gilbert1907-Gilbert G.K. Collection/ggk03013 ID. Gilbert, G.K. 3013 Head of Such landslide. Alameda County, California. 1907. Published as plate 16-B in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03014 ID. Gilbert, G.K. 3014 A landslide on the Such dairy farm in Strawberry Canyon, Berkeley Hills, 1 mile from the University of California. The movement began about March l6, 1907, and continued for two or three weeks. Head of Such landslide, Alameda County, California. March 26, 1907. #1:/Gilbert1906-Gilbert G.K. Collection/ggk03015 ID. Gilbert, G.K. 3015 Head erosion on pastured land with light turf, southwest slope toward ocean near Willow Camp. Marin County, California. March 1906. Published as plate 18 in U.S. Geological Survey. Professional paper 105. 1917. #1:/Gilbert1906-Gilbert G.K. Collection/ggk03016 ID. Gilbert, G.K. 3016 Cattle trails and incidental erosion near Woodville. Marin County, California. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk03017 ID. Gilbert, G.K. 3017 Delta of a small stream. Marin County, California. March 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk03018 ID. Gilbert, G.K. 3018 Tree (Umbellaria) shaped by wind from northwest, 1 mile northeast of Olema. Marin County, California, 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk03019 ID. Gilbert, G.K. 3019 California earthquake. Tectonic valley southeast of Tomales Bay, looking southeast. At right a compound fault scarp, at left a slope due partly to tilting. The earthquake fault of 1906 follows this valley. A glimpse of Olema. Marin County, California. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk03020 ID. Gilbert, G.K. 3020 California earthquake. Tectonic valley southeast of Tomales Bay. Marin County, California. 1906. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03021 ID. Gilbert, G.K. 3021 California earthquake. Head of Tomales Bay and delta of Papermill Creek, looking north from spur of Mount Whittenberg. Marin County, California. 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03022 ID. Gilbert, G.K. 3022 California earthquake. Delta of Papermill Creek, head of Tomales Bay; Mount Whittenberg in distance. The trace of the earthquake fault was through the middle of the delta. Marin County, California. March 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03023 ID. Gilbert, G.K. 3023 California earthquake. Delta of Papermill Creek, head of Tomales Bay, looking southwest. In the marsh beyond the open water a line of narrow pools marks the line of the earthquake fault of 1906. Marin County, California. 1907. (Panorama with photo no. 3024) #1:/Gilbert1907-Gilbert G.K. Collection/ggk03024 ID. Gilbert, G.K. 3024 California earthquake. Delta of Papermill Creek, head of Tomales Bay, looking southwest. In the marsh beyond the open water a line of narrow pools marks the line of the earthquake fault of 1906. Marin County, California. 1907. (Panorama with photo no. 3023) #1:/Gilbert1907-Gilbert G.K. Collection/ggk03025 ID. Gilbert, G.K. 3025 California earthquake. Marshy delta of Papermill Creek, looking S. 40 degrees E. Near the middle and running from background toward distance a line of contrasted vegetation marks position of a line of the earthquake fault of 1906. Marin County, California, ca. 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03026 ID. Gilbert, G.K. 3026 California earthquake. Earthquake crack on delta of Papermill Creek, Tomales Bay, looking southwest. The fault trace here consists of a series of cracks arranged en echelon. Trees in distance at right (only) are moulded by wind. Marin County, California. ca. 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03027 ID. Gilbert, G.K. 3027 California earthquake. Features of earthquake fault on the marshy delta of Papermill Creek, Tomales Bay, looking northeast. In the foreground are cracks of the fault trace and just beyond these a pool of the series bordering the trace on the northeast. Marin County, California, ca. 1907. #1:/Gilbert1906-Gilbert G.K. Collection/ggk03028 ID. Gilbert, G.K. 3028 California earthquake. Fence offset by earthquake fault of April 18, 1906, on ranch of E.R. Strain, 1 1/2 miles north of Bolinas Lagoon, looking northeast. The sheer offset is 8 1/2 feet; the total displacement, shown partly by crooking of fence, is 11 feet. Marin County, California. March 1907. #1:/Gilbert1906-Gilbert G.K. Collection/ggk03029 ID. Gilbert, G.K. 3029 California earthquake. Line of eucalyptus trees offset by earthquake fault of 1906. The line was set to mark the boundary between farms near Woodville. The distant length of fence closes the gap made by the fault. Looking southwest, Marin County, California, ca. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk03030 ID. Gilbert, G.K. 3030 California earthquake. Trace of earthquake fault near Woodville, looking southeast. Marin County, California, ca. 1906. #1:/Point Reyes National Seashore/ggk03031 ID. Gilbert, G.K. 3031 Point Reyes National Seashore, California. Earthquake fault near Bondietti ranch, 5 miles south of Olema. 1906. Photo taken after the San Francisco earthquake of April 18, 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk03032 ID. Gilbert, G.K. 3032 California earthquake. Earthquake fault 1 mile south of Shafter's ranch, Olema. Marin County, California, ca. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk03033 ID. Gilbert, G.K. 3033 California earthquake. Rift topography north of Bolinas Lagoon, looking north. The ridge running from the houses to the skyline (left of middle) and the valleys on both sides are diastrophic. The earthquake fault of 1906 follows the valley at left. Marin County, California, ca. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk03034 ID. Gilbert, G.K. 3034 California earthquake. Rift topography 4 1/2 miles south of Olema, looking north-northwest. The slope from the uplifted ridge at left to a down thrown valley at right is interrupted by a side-hill ridge and sag, shown in middle of view. The side-hill ridge is crossed and divided by the drainage. The sag is traversed from foreground to distance by the fault of 1906. Marin County, California. ca. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk03035 ID. Gilbert, G.K. 3035 California earthquake. Rift topography 4 1/2 miles south of Olema. The features here are seen from south-southeast. Marin County, California, ca. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk03036 ID. Gilbert, G.K. 3036 California earthquake. Rift topography 4 1/2 miles south of Olema. Marin County, California, ca. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk03037 ID. Gilbert, G.K. 3037 California earthquake. Rift topography midway between Olema and Bolinas Lagoon, looking southeast. The large central hill is the end of a fault ridge. On its slope are two fault ridges and fault sags. Through the lower sag runs the fault trace of 1906, Marin County, California. ca. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk03038 ID. Gilbert, G.K. 3038 California earthquake. Rift topography midway between Olema and Bolinas Lagoon, looking northwest. The stream valley at left is controlled in position by a fault sag. The slope rising from it to the ridge at right has an inflection, producing a shallow side-hill sag, which ascends from foreground to distance. Marin County, California, ca. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk03039 ID. Gilbert, G.K. 3039 California earthquake. Rift topography 1 1/2 miles south of Olema near Boucher ranch, looking southeast. A hilltop between fault sags. A faint sag along the hill crest contains a pond and is followed by the fault trace of 1906. Marin County, California, ca. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk03040 ID. Gilbert, G.K. 3040 California earthquake. Rift topography 2 1/2 miles northwest of Bolinas Lagoon, looking southeast. The valley and the ridges bounding it are due to faulting. The water at right is a pond and the fault of 1906 passed near it. There is no stream in the valley. Marin County, California, ca. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk03041 ID. Gilbert, G.K. 3041 California earthquake. Rift topography 3 miles northwest of Bolinas Lagoon, looking southeast. Fault sag on hillside with pond. Marin County, California, ca. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk03042 ID. Gilbert, G.K. 3042 California earthquake. Rift topography 1 1/2 miles south of Olema, looking northwest from Boucher ranch. The fault of 1906 crosses the slope at the right. Marin County, California. ca. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk03043 ID. Gilbert, G.K. 3043 California earthquake. Rift topography 1 1/2 miles south of Olema, looking southeast toward Boucher ranch. Marin County, California, ca. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk03044 ID. Gilbert, G.K. 3044 California earthquake. Rift topography 2 miles south of Olema, looking east-southeast. A fault sag not followed by drainage. Marin County, California. ca. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk03045 ID. Gilbert, G.K. 3045 California earthquake. Rift topography 1 1/2 miles south of Olema near Boucher ranch, looking southeast. A sag independent of drainage. Between the ponds is seen the trace of the fault of 1906. Marin County, California, ca. 1906. #1:/Gilbert1906-Gilbert G.K. Collection/ggk03046 ID. Gilbert, G.K. 3046 California earthquake. Rift topography south of Shafter's place, Olema. A deep fault sag has been aggraded and contains a swamp. The trench occupied by water is part of the trace of the earthquake fault of 1906. Marin County. California, ca. 1906. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03047 ID. Gilbert, G.K. 3047 California earthquake. Landslide near Beisler's ranch, 4 miles northwest of Bolinas Lagoon, looking south. The slide occurred in March, 1907, but was conditioned in part by earthquake cracks of 1906. The view also illustrates rift topography. Marin County, California. March 30, 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03048 ID. Gilbert, G.K. 3048 California earthquake. Landslides 2 1/2 miles northwest of Bolinas Lagoon, looking east-northeast. Earthquake cracks made in April, 1906, caught water from rains the following winter. The saturated earth flowed as liquid mud. Marin County, California. March 29, 1907. (Panorama with photo no. 3049) #1:/Gilbert1907-Gilbert G.K. Collection/ggk03049 ID. Gilbert, G.K. 3049 California earthquake. Landslides 2 1/2 miles northwest of Bolinas Lagoon, looking east-northeast. Earthquake cracks made in April, 1906, caught water from rains the following winter. The saturated earth flowed as liquid mud. Marin County, California. March 29, 1907. (Panorama with photo no. 3048) #1:/Gilbert1907-Gilbert G.K. Collection/ggk03050 ID. Gilbert, G.K. 3050 Bolinas Bay and Lagoon from the east, about two hours before low water in the lagoon. Marin County, California. March 8, 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03051 ID. Gilbert, G.K. 3051 Bolinas Bay and Lagoon from the east, about one hour before low water in the lagoon. Marin County, California. March 8, 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03052 ID. Gilbert, G.K. 3052 Bolinas Lagoon from bluff north of Bolinas, looking north-northwest at low tide. At right is Pepper Island. Marin County, California. April 1907. (Panorama with photo nos. 3053-3054) #1:/Gilbert1907-Gilbert G.K. Collection/ggk03053 ID. Gilbert, G.K. 3053 Bolinas Lagoon and Pepper Island, looking north. Marin County, California, April 1907. (Panorama with photo nos. 3052, 3054) #1:/Gilbert1907-Gilbert G.K. Collection/ggk03054 ID. Gilbert, G.K. 3054 Bolinas Lagoon and Pepper Island, looking northeast. Marin County, California. April 1907. (Panorama with photo nos. 3052-3053) #1:/Gilbert1907-Gilbert G.K. Collection/ggk03055 ID. Gilbert, G.K. 3055 California earthquake. Pepper Island, Bolinas Lagoon, looking northwest. The line of the earthquake fault was between the pool and professor Jepson. Marin County, California. April 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03056 ID. Gilbert, G.K. 3056 California earthquake. Trace of earthquake fault on Pepper Island, Bolinas Lagoon, looking southeast. The ground at left of fault trace is depressed. Marin County, California. April 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03057 ID. Gilbert, G.K. 3057 California earthquake. Rift topography near head of Bolinas Lagoon. The fault sag of the left center is continued in the foreground at right as a narrow cleft with marsh. The fault line of 1906 follows the marsh, crosses the road at the gate, and obliquely climbs the ridge at right. Marin County, California. ca. 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03058 ID. Gilbert, G.K. 3058 California earthquake. Head of Pine Gulch near Bolinas, looking south. The creek leaves an open valley to make a detour through an upland, its course being apparently deterained by phenomena of the earthquake rift. Marin County, California. ca. 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03059 ID. Gilbert, G.K. 3059 Trees (chiefly Umbellaria californica) controlled in development by wind; head of Pine Gulch, looking southwest. Marin County, California. ca. 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03060 ID. Gilbert, G.K. 3060 Landslides, chiefly of 1907, Berkeley Hills, 1 mile east of Berkeley, looking west. Alameda County, California. March 30, 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03061 ID. Gilbert, G.K. 3061 Oak tree controlled in development by wind, head of Tomales Bay, looking northeast. Marin County, California. ca. 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03062 ID. Gilbert, G.K. 3062 Estuary on southwest shore of Tomales Bay, near Inverness, looking northwest. Marin County, California, ca. 1907. (Panorama with photo no. 3063) #1:/Gilbert1907-Gilbert G.K. Collection/ggk03063 ID. Gilbert, G.K. 3063 Estuary on southwest shore of Tomales Bay, near Inverness, looking north-northwest. Marin County, California, ca. 1907. (Panorama with photo no. 3062) #1:/Gilbert1907-Gilbert G.K. Collection/ggk03064 ID. Gilbert, G.K. 3064 Frontal part of a sand deposit made by a swift temporary flood near Point Reyes Station. Marin County, California. ca. 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03065 ID. Gilbert, G.K. 3065 California earthquake. Branch of fault trace (earthquake of 1906) on the "north mesa" at Inverness, looking southeast. Marin County, California, ca. 1907 #1:/Gilbert1907-Gilbert G.K. Collection/ggk03066 ID. Gilbert, G.K. 3066 California earthquake. Fault trace on delta of Papermill Creek, looking northwest; Tomales Bay in distance. Marin County, California, ca. 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03067 ID. Gilbert, G.K. 3067 California earthquake. Fault trace on delta of Papermill Creek, looking northwest; Tomales Bay in distance. Marin County, California, ca. 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03068 ID. Gilbert, G.K. 3068 California earthquake. Fault trace on delta of Papermill Creek, looking northwest; Tomales Bay in distance. Marin County, California, ca. 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03069 ID. Gilbert, G.K. 3069 Spring on shore of Salton Sea near Imperial Junction. The water of spring was of normal temperature and visibly turbid. The material of its mound is more coherent than that of the adjacent plain. Imperial County, California. May 10, 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03070 ID. Gilbert, G.K. 3070 Shore of Salton Sea, 2 or 3 miles east of mouth of New River. The low bluff is the highest watermark of the lake. Imperial County, California. May 15, 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03071 ID. Gilbert, G.K. 3071 Bay of Salton Sea, 1 mile southeast? of Durmid Station. Imperial County, California. May 16, 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03072 ID. Gilbert, G.K. 3072 Shore of Salton Sea, 1 mile southeast? of Duraid Station. Imperial County, California. May 16, 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03073 ID. Gilbert, G.K. 3073 Ancient shore line of Salton Basin near Durmid Station. Riverside County, California, ca. 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03074 ID. Gilbert, G.K. 3074 Ancient shore line of Salton Basin near Durmid Station. Riverside County, California, ca. 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03075 ID. Gilbert, G.K. 3075 Ancient shore line of Salton Basin near Imperial Junction. Riverside County, California, ca, 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03076 ID. Gilbert, G.K. 3076 Calcareous tufa attached to sandstone a few feet below level of highest ancient shore line in Salton Basin near Durmid Station. Riverside County, California, ca. 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03077 ID. Gilbert, G.K. 3077 Ancient beach of Salton Basin near Imperial Junction. This is one of a series of beaches contouring the slope below the main beach. Imperial County, California. ca. 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03078 ID. Gilbert, G.K. 3078 Covillea (tridentata?) near Imperial Junction. Imperial County, California, ca. 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03079 ID. Gilbert, G.K. 3079 Olneya tesota near Imperial Junction. 1907. Imperial County, California. May #1:/Gilbert1907-Gilbert G.K. Collection/ggk03080 ID. Gilbert, G.K. 3080 Lycium (cooperi?). Imperial Junction. Imperial County, California. May 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03081 ID. Gilbert, G.K. 3081 Palo Verde (Parkinsonia aculeata). California, ca. 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03082 ID. Gilbert, G.K. 3082 Wind-formed hills of very fine sand arrested by a growth of mesquite, northwest of Brawley. Direction of wind, from right to left. Imperial County, California, ca. 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03083 ID. Gilbert, G.K. 3083 Wind-formed hill of fine sand arrested by a growth of mesquite, northwest of Brawley. Direction of dominant wind from camera toward the hill. Imperial County, California. ca. 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03084 ID. Gilbert, G.K. 3084 Crescentic sand dune on plain northwest of Brawley. Direction of dominant wind from right to left (northwest to southeast). Imperial Valley, Imperial County, California, ca. 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03085 ID. Gilbert, G.K. 3085 Plain formed by aggrading action of sheet flood 1 mile west of Imperial Junction. Imperial County, California. ca. 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03086 ID. Gilbert, G.K. 3086 Mud cracks near Salton Station. Riverside County, California, ca. 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03087 ID. Gilbert, G.K. 3087 Cow-path terraces near Willow Camp. Marin County, California, ca. 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03088 ID. Gilbert, G.K. 3088 Southeast from West point Hotel, north slope of Mount Tamalpais; in middle distance is Richardson Bay. A fog, formed over the ocean, drifts eastward and pours over the ridge extending from Mount Tamalpais to the Golden Gate. As it descends the eastern slope of the ridge it is dissipated. The fog stream which flows eastward through the Golden Gate is seen in the distance. Marin County, California, ca. 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03089 ID. Gilbert, G.K. 3089 Southeast from West Point Hotel, north slope of Mount Tamalpais; in middle distance is Richardson Bay, A fog, formed over the ocean, drifts eastward and pours over the ridge extending from Mount Tamalpais to the Golden Gate. As it descends the eastern slope of the ridge it is dissipated. The fog stream which flows eastward through the Golden Gate is seen in the distance, Marin County, California, ca. 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03090 ID. Gilbert, G.K. 3090 Landslides of the wet type near Limantour Bay. It probably occurred the preceding March in consequence of heavy rains. Marin County, California. May 24, 1907. (Panorama with photo no. 3091) #1:/Gilbert1907-Gilbert G.K. Collection/ggk03091 ID. Gilbert, G.K. 3091 Landslides of the wet type near Limantour Bay. It probably occurred the preceding March in consequence of heavy rains. Marin County, California. May 24, 1907. (Panorama with photo no. 3090) #1:/Gilbert1907-Gilbert G.K. Collection/ggk03092 ID. Gilbert, G.K. 3092 Eastern end of Umantour Bay. At right is a spit separating the bay from the ocean. The camera stands near the crest of a cliff formed by the waves before the making of the spit. Marin County, California, ca. 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03093 ID. Gilbert, G.K. 3093 An arm of Limantour Bay. This arm is the estuary of a small creek, the valley of which was drowned by a subsidence of the land. Marin County, California, ca. 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03094 ID. Gilbert, G.K. 3094 Tidal marsh in Limantour Bay showing old and new growths of Salicornia. The new colony at a lower level than the old may have been induced by an elevation of the land at the time of the San Francisco earthquake. Marin County, California. ca. 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03095 ID. Gilbert, G.K. 3095 Old and new growths of Salicornia in Limantour Bay. Marin County, California. ca. 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03096 ID. Gilbert, G.K. 3096 Old and new growths of Salicornia in limantour Bay. The new growth covers the bottom of a tidal channel. Marin County, California. ca. 1907. #1:/Gilbert1907-Grunsky C.E. Collection/ggk03097 ID. Gilbert, G.K. 3097 (General Collection 3001) Mud cracks in clay freshly deposited by the Colorado River, delta of Colorado River, in Mexico. Baja California, Mexico. April 1907. Photo by C.E. Grunsky) #1:/Gilbert1907-Gilbert G.K. Collection/ggk03098 ID. Gilbert, G.K. 3098 Barrier no. 1, Yuba River, from south abutment. The dam was breached by the flood of March 1907. Yuba County, California. June 11, 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03099 ID. Gilbert, G.K. 3099 Barrier no. 1, Yuba River, from the north abutment. Yuba County, California. June 11, 1907. #1:/Alaska/ggk0309a ID. Gilbert, G.K. 309a Alaska. Hanging valley on the east wall of Nunatak Fiord, east of Yakutat Bay in the St. Elias Mountains. Harriman Expedition, 1899. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03100 ID. Gilbert, G.K. 3100 Barrier no. 1, Yuba River. Erosion of concrete at base lower 0-G. Yuba County, California. June 11, 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03101 ID. Gilbert, G.K. 3101 Barrier no. 1, Yuba River. The gravel bank in the foreground was deposited after the breach, and after the removal of the apron and its outer line of supporting piles. Yuba County, California. June 11, 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03102 ID. Gilbert, G.K. 3102 Barrier no. 1, Yuba River. The piles mark the original inner edge of the apron. They were originally flush with the concrete. Their erosion on the upstream side occurred after the settling of the concrete facing, due to undermining by flood action. Yuba County, California. June 11, 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03103 ID. Gilbert, G.K. 3103 Barrier no. 1, Yuba River, from the north remnant of upper platform. Yuba County, California. June 11, 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03104 ID. Gilbert, G.K. 3104 Barrier no. 1, Yuba River, from the north remnant of upper platform. At left the north abutment; at right a remnant of the deposit made above the dam, chiefly in the winter of 1905-1906. Yuba County, California. June 11, 1907. #1:/Yosemite National Park/ggk03105 ID. Gilbert, G.K. 3105 Yosemite National Park, California. Tuolumne Meadows. These large meadows are the central features of the upper Tuolumne Basin. In the background from left to right: Mount Dana, Mount Gibbs, and Kuna Crest. 1903. Plate 13-A, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/ggk03106 ID. Gilbert, G.K. 3106 Yosemite National Park, California. Tenaya Lake, viewed from the southwest, occupies a glacial rock basin in granite. Circa 1907. #1:/Yosemite National Park/ggk03107 ID. Gilbert, G.K. 3107 Yosemite National Park, California. Lake Tenaya. Circa 1907. #1:/Yosemite National Park/ggk03108 ID. Gilbert, G.K. 3108 Yosemite National Park, California. Tenaya Lake and Tenaya Dome. The rock is granite. Circa 1907. #1:/Yosemite National Park/ggk03109 ID. Gilbert, G.K. 3109 Yosemite National Park, California. Tenaya Lake and Tenaya Dome. The rock is granite. Circa 1907. #1:/Yosemite National Park/ggk03110 ID. Gilbert, G.K. 3110 Yosemite National Park, California. Granite dome northeast of Tenaya Lake. The valley shown is drained partly to the Merced River and partly to the Tuolumne River. Circa 1907. #1:/Yosemite National Park/ggk03111 ID. Gilbert, G.K. 3111 Yosemite National Park, California. Lambert Dome from near Soda Springs in Tuolumne Meadows. The material is granite. Circa 1907. #1:/Yosemite National Park/ggk03112 ID. Gilbert, G.K. 3112 Yosemite National Park, California. Summit of El Capitan, overlooking Yosemite Valley, viewed from the northwest. Circa 1907. #1:/Yosemite National Park/ggk03113 ID. Gilbert, G.K. 3113 Yosemite National Park, California. Summit of El Capitan, overlooking Yosemite Valley, viewed from the northwest. Circa 1907. #1:/Yosemite National Park/ggk03114 ID. Gilbert, G.K. 3114 Yosemite National Park, California. Exfoliation caused by heating. A fire built upon the slightly arching surface of a body of firm granite expanded the superficial portion, causing it to rupture along planes nearly parallel to the surface. Circa 1907. #1:/Yosemite National Park/ggk03115 ID. Gilbert, G.K. 3115 Yosemite National Park, California. Continuation northward of the El Capitan Dome, which overlooks Yosemite Valley. The dome illustrates a tendency of granite domes to be sparsely covered by vegetation, even when the disintegration of the surface rock has made considerable progress. Circa 1907. #1:/Yosemite National Park/ggk03116 ID. Gilbert, G.K. 3116 Yosemite National Park, California. Portion of the western slope of Mount Dana, showing tracks of avalanches which break the continuity of a forest of Murray pines. Altitude of mountain shoulder is 11,200 feet; of foreground, 9,700 feet. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03117 ID. Gilbert, G.K. 3117 Trees broken off by avalanche near Tioga Lake, Sierra Nevada. Mount Dana in the distance. Mono County, California, ca. 1907. #1:/Yosemite National Park/ggk03118 ID. Gilbert, G.K. 3118 Yosemite National Park, California. Head of Tenaya Lake. The delta of the inlet stream occupies the whole width of the basin, being margined by a wave- built beach which controls its outline. Circa 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03119 ID. Gilbert, G.K. 3119 Meanders of Leevining Creek above Rinedollar Lake. The lake and meadow occupy a glacial rock basin. The landforms of the view are all glacial except portions of the distant upland, representing an ancient base level. Mono County, California, ca. 1907. #1:/Yosemite National Park/ggk03120 ID. Gilbert, G.K. 3120 Yosemite National Park, California. Banded granite near Tenaya Lake. Surface of talus block from the cliff at north. Circa 1907. #1:/Yosemite National Park/ggk03121 ID. Gilbert, G.K. 3121 Yosemite National Park, California. Mortar holes and pestle on a granite boulder near Harden Lake. Circa 1907. #1:/Yosemite National Park/ggk03122 ID. Gilbert, G.K. 3122 Yosemite National Park, California. Mortar holes and pestle on a granite boulder near Harden Lake. Circa 1907. #1:/Yosemite National Park/ggk03123 ID. Gilbert, G.K. 3123 Yosemite National Park, California. Glaciated granite dome at the west end of Tuolumne Meadows. The direction of ice movement was from right to left. The line of glacial potholes is partly marked by trees, and various tracts of the surface are covered by incipient potholes. Circa 1907. #1:/Yosemite National Park/ggk03124 ID. Gilbert, G.K. 3124 Yosemite National Park, California. Typical pothole of subglacial origin at the lower end of Tuolumne Meadows. Above the pothole are remnants of a torrent channel extending across a steep rock slope where, manifestly, no stream could have flowed in the open. The rock slope and the channel are in part still veneered with glacier polish. Several of the cobbles that did the grinding lie in the pothole. A pine tree has taken root in the granite sand that has been washed into the hole. 1903. Plate 34-B, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/ggk03125 ID. Gilbert, G.K. 3125 Yosemite National Park, California. Moulin sculpture near Tuolumne Meadows. Circa 1907. #1:/Yosemite National Park/ggk03126 ID. Gilbert, G.K. 3126 Yosemite National Park, California. Moulin sculpture near Tuolumne Meadows. Circa 1907. #1:/Yosemite National Park/ggk03127 ID. Gilbert, G.K. 3127 Yosemite National Park, California. Moulin sculpture near Tuolumne Meadows. Circa 1907. #1:/Yosemite National Park/ggk03128 ID. Gilbert, G.K. 3128 Yosemite National Park, California. Glacial potholes on the slope of Tenaya Dome near Tenaya Lake. Circa 1907. #1:/Yosemite National Park/ggk03129 ID. Gilbert, G.K. 3129 Yosemite National Park, California. Glacial potholes on the slope of Tenaya Dome near Tenaya Lake. Circa 1907. #1:/Yosemite National Park/ggk03130 ID. Gilbert, G.K. 3130 Yosemite National Park, California. Glacial potholes and incipient potholes on the north side of a small dome south of Lambert Dome. The ice movement was from left to right. Circa 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03131 ID. Gilbert, G.K. 3131 Glaciated boss of quartzite near Tioga Lake. In the distance at left the mouth of a hanging valley (Glacier Valley) between Mount Dana and Dana Plateau. Mono County, California, ca, 1907. #1:/Yosemite National Park/ggk03132 ID. Gilbert, G.K. 3132 Yosemite National Park, California. Glaciated surface of Tenaya Dome near Tenaya Lake. The striae and grooves indicate two directions of ice movement: the earlier from right to left, the later from foreground to distance. Circa 1907. #1:/Yosemite National Park/ggk03133 ID. Gilbert, G.K. 3133 Yosemite National Park, California. Crescentic cracks on a glaciated surface of aplite near Tenaya Lake. Direction of ice motion is from right to left. Circa 1907. #1:/Yosemite National Park/ggk03134 ID. Gilbert, G.K. 3134 Yosemite National Park, California. Crescentic cracks on glaciated surface of aplite near Tenaya Lake. Direction of the ice motion from right to left. Circa 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03135 ID. Gilbert, G.K. 3135 Portion of the rock rim of Tioga Lake, Sierra Nevada. The outlet passes among the glaciated knobs at right of lake. The whole area shown by the view was occupied by Pleistocene ice. The ice movement in the nearer parts of the area was from left to right. Mono County, California. ca. 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03136 ID. Gilbert, G.K. 3136 Portion of the upper basin of Leevining Creek, Sierra Nevada, illustrating glacial sculpture of metamorphic rocks of unequal resistance. The general direction of ice movement was from left to right. Mono County, California. ca. 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03137 ID. Gilbert, G.K. 3137 Portion of the upper basin of Leevining Creek, Sierra Nevada, illustrating the glacial sculpture of metamorphic rocks of unequal resistance. The general direction of ice movement was from left to right. Mono County, California. ca. 1907. #1:/Yosemite National Park/ggk03138 ID. Gilbert, G.K. 3138 Yosemite National Park, California. Pond occupying a basin between lateral moraines of an ancient glacier in Tuolumne Canyon near Harden Lake. Circa 1907. #1:/Yosemite National Park/ggk03139 ID. Gilbert, G.K. 3139 Yosemite National Park, California. Lateral moraine of Tuolumne Canyon Glacier near Harden Lake. Circa 1907. #1:/Yosemite National Park/ggk03140 ID. Gilbert, G.K. 3140 Yosemite National Park, California. Lateral moraine of Tuolumne Canyon Glacier near Harden Lake. Circa 1907. #1:/Yosemite National Park/ggk03141 ID. Gilbert, G.K. 3141 Yosemite National Park, California. Hanging valley south of the head of Tenaya Lake. Circa 1907. #1:/Yosemite National Park/ggk03142 ID. Gilbert, G.K. 3142 Yosemite National Park, California. Hanging valley under the north edge of Dana Plateau. Circa 1907. #1:/Yosemite National Park/ggk03143 ID. Gilbert, G.K. 3143 Yosemite National Park, California. Northwestward from the wall of Tuolumne Canyon near Harden Lake. The even skyline is produced by remnants of an ancient peneplain. Circa 1907. #1:/Gilbert1907-Gilbert G.K. Collection/ggk03144 ID. Gilbert, G.K. 3144 Westward across Tioga Lake from face of Dana Plateau. Remnants of an ancient peneplain appear in the uplands. Mono County, California, ca. 1907. #1:/Yosemite National Park/ggk03145 ID. Gilbert, G.K. 3145 Yosemite National Park, California. Surface of Dana Plateau, looking southeast. Circa 1907. Photos ggk03145 and ggk03146 form a panorama. #1:/Yosemite National Park/ggk03146 ID. Gilbert, G.K. 3146 Yosemite National Park, California. Head of Glacier Canyon. Dana Peak overlooking Dana Plateau on the right. Circa 1907. Photos ggk03145 and ggk03146 form a panorama. #1:/Yosemite National Park/ggk03147 ID. Gilbert, G.K. 3147 Yosemite National Park, California. Dana Glacier and the head of Glacier Canyon. Circa 1907. #1:/Yosemite National Park/ggk03148 ID. Gilbert, G.K. 3148 Yosemite National Park, California. Dana Glacier, viewed from the edge of Dana Plateau. The peak on the right is Mount Dana. August 23, 1907. #1:/Yosemite National Park/ggk03149 ID. Gilbert, G.K. 3149 Yosemite National Park, California. Rampart of boulders on the shore of Tenaya Lake. The boulders have been pushed landward by the expansion of the lake ice in winter. Circa 1907. #1:/Alaska Glaciers/ggk0314a ID. Gilbert, G.K. 314a Alaska Glaciers. Part of Hubbard Glacier, which is north-northeast of Yakutat in the St. Elias Mountains. This portion is largely stagnant, and by wasting, has accumulated englacial drift on its surface. Harriman Expedition, June 21, 1899. #1:/Yosemite National Park/ggk03150 ID. Gilbert, G.K. 3150 Yosemite National Park, California. Ice-formed rampart on the shore of Tenaya Lake. Circa 1907. #1:/Yosemite National Park/ggk03151 ID. Gilbert, G.K. 3151 Yosemite National Park, California. Ice-formed rampart on the shore of Tenaya Lake. Circa 1907. #1:/Yosemite National Park/ggk03152 ID. Gilbert, G.K. 3152 Yosemite National Park, California. Ice-formed rampart on the shore of Tenaya Lake. Circa 1907. #1:/Yosemite National Park/ggk03153 ID. Gilbert, G.K. 3153 Yosemite National Park, California. Summit of Mount Hoffman, viewed from the west. Pleistocene glaciers occupied both slopes, those on the left (north) being more vigorous and beheading the cirque which faced toward the south. Circa 1907. #1:/Yosemite National Park/ggk03154 ID. Gilbert, G.K. 3154 Yosemite National Park, California. Crest extending west-southwest from Mount Hoffman. The cirques illustrate the more vigorous glaciation on the northward slope. A distant part of the crest shows a remnant of an old peneplain. Circa 1907. #1:/Yosemite National Park/ggk03155 ID. Gilbert, G.K. 3155 Yosemite National Park, California. Portion of cirque cliffs on the northward slope of Mount Hoffman. Circa 1907. #1:/Yosemite National Park/ggk03156 ID. Gilbert, G.K. 3156 Yosemite National Park, California. Old peneplain west-southwest from Mount Hoffman. Circa 1907. #1:/Yosemite National Park/ggk03157 ID. Gilbert, G.K. 3157 Yosemite National Park, California. From the summit of Mount Hoffman, showing two types of Pleistocene glaciation. The stronger glaciers, on the north side, eroded deeply and made cirque cliffs which encroached on the weaker glaciers of the opposite slope. Circa 1907. Photos ggk03157, ggk03158, and ggd03159 form a panorama. #1:/Yosemite National Park/ggk03158 ID. Gilbert, G.K. 3158 Yosemite National Park, California. From the summit of Mount Hoffman, showing two types of Pleistocene glaciation. The stronger glaciers, on the north side, eroded deeply and made cirque cliffs which encroached on the weaker glaciers of the opposite slope. Circa 1907. Photos ggk03157, ggk03158, and ggd03159 form a panorama. #1:/Yosemite National Park/ggk03159 ID. Gilbert, G.K. 3159 Yosemite National Park, California. From the summit of Mount Hoffman, showing two types of Pleistocene glaciation. The stronger glaciers, on the north side, eroded deeply and made cirque cliffs which encroached on the weaker glaciers of the opposite slope. Circa 1907. Photos ggk03157, ggk03158, and ggd03159 form a panorama. #1:/Yosemite National Park/ggk03160 ID. Gilbert, G.K. 3160 Yosemite National Park, California. Southeast slope of the northeast spur of Mount Hoffman, showing a shallow type of Pleistocene glacial erosion in which the superficial rocks were somewhat uniformly excavated to a depth of about 200 feet. Circa 1907. #1:/Yosemite National Park/ggk03161 ID. Gilbert, G.K. 3161 Yosemite National Park, California. Upper basin of Yosemite Creek, viewed from Mount Hoffman. Circa 1907. #1:/Yosemite National Park/ggk03162 ID. Gilbert, G.K. 3162 Yosemite National Park, California. Arˆte between two glacial troughs on the south slope of Mount Hoffman. The upper and lower parts of the arˆte exhibit two systems of joints: the former parallel to an ancient surface of the mountain before the last glacial erosion, the latter approximately parallel to the present surface. Circa 1907, #1:/Yosemite National Park/ggk03163 ID. Gilbert, G.K. 3163 Yosemite National Park, California. Arˆte between two glacial troughs on the south slope of Mount Hoffman. The upper and lower parts of the arˆte exhibit two systems of joints: the former parallel to an ancient surface of the mountain before the last glacial erosion, the latter approximately parallel to the present surface. Circa 1907, #1:/Yosemite National Park/ggk03164 ID. Gilbert, G.K. 3164 Yosemite National Park, California. Downward from Mount Hoffman on the basin at the head of Yosemite Creek. The nearer lake is partly frozen. A system of vertical joints is exhibited in the ground plan. August 14, 1907. #1:/Yosemite National Park/ggk03165 ID. Gilbert, G.K. 3165 Yosemite National Park, California. Pinus albicaulis on Dana Plateau. The upward growth of the tree is restricted through some action of the wind, probably by the cutting effect of drifting ice particles. Some of the more prominent twigs are shorn of leaves. Circa 1907. #1:/Yosemite National Park/ggk03166 ID. Gilbert, G.K. 3166 Yosemite National Park, California. Pinus albicaulis on Dana Plateau. The upward growth of the tree is restricted through some action of the wind, probably by the cutting effect of drifting ice particles. Some of the more prominent twigs are shorn of leaves. Circa 1907. #1:/Yosemite National Park/ggk03167 ID. Gilbert, G.K. 3167 Yosemite National Park, California. Pinus albicaulis near Mono Pass. Some of the trees have the erect habit, although not thrifty. Other trees and branches are prostrate. Circa 1907. #1:/Yosemite National Park/ggk03168 ID. Gilbert, G.K. 3168 Yosemite National Park, California. Sugar pine among firs at the old Gentry sawmill near Yosemite Valley at an altitude of 6,000 feet. Circa 1907. #1:/Yosemite National Park/ggk03169 ID. Gilbert, G.K. 3169 Yosemite National Park, California. Juniper (Juniperus occidentalis) near Tenaya Lake at an altitude of 8,500 feet. Circa 1907. #1:/Yosemite National Park/ggk03170 ID. Gilbert, G.K. 3170 Yosemite National Park, California. Black oak near a sequoia. Circa 1907. #1:/Yosemite National Park/ggk03171 ID. Gilbert, G.K. 3171 Yosemite National Park, California. Trunk of dead sugar pine near a sequoia. The black ridges or welts are independent of the general direction of the grain. They are not peculiar to this individual or species, but occur on the trunks of various other trees. Circa 1907. #1:/Yosemite National Park/ggk03172 ID. Gilbert, G.K. 3172 Yosemite National Park, California. Mountain pine (Pinus monticola) on the south slope of Mount Hoffmann at an altitude of 10,000 feet. 1908. #1:/Yosemite National Park/ggk03173 ID. Gilbert, G.K. 3173 Yosemite National Park, California. Jeffrey pine (Pinus Jeffreyi) at the old Gentry sawmill. 1908. #1:/Yosemite National Park/ggk03174 ID. Gilbert, G.K. 3174 Yosemite National Park, California. Fallen bough of Sequoia gigantean in Tuolumne Grove near North Crane Creek. 1908. #1:/Yosemite National Park/ggk03175 ID. Gilbert, G.K. 3175 Yosemite National Park, California. Bough of young Sequoia gigantea in Tuolumne Grove. 1908. #1:/Yosemite National Park/ggk03176 ID. Gilbert, G.K. 3176 Yosemite National Park, California. Bough of young Sequoia gigantea in Tuolumne Grove. 1908. #1:/Yosemite National Park/ggk03177 ID. Gilbert, G.K. 3177 Yosemite National Park, California. Branch of Pinus Murrayi at the base of Mount Hoffman at an altitude of 8,500 feet. 1908. #1:/Yosemite National Park/ggk03178 ID. Gilbert, G.K. 3178 Yosemite National Park, California. Dying forest of Murray pines between Tenaya Lake and Tuolumne Meadows. 1908. #1:/Yosemite National Park/ggk03179 ID. Gilbert, G.K. 3179 Yosemite National Park, California. Dying forest of Murray pines between Tenaya Lake and Tuolumne Meadows. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03180 ID. Gilbert, G.K. 3180 Jeffrey pine, Sierra Nevada, showing mound-like uplift of earth about its base, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03181 ID. Gilbert, G.K. 3181 Black fir, Sierra Nevada, showing mound-like uplift about its base. California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03182 ID. Gilbert, G.K. 3182 Giant Sequoia, Sierra Nevada, showing mound-like uplift about its base. California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03183 ID. Gilbert, G.K. 3183 Trunk of giant Sequoia, Sierra Nevada, showing crenulation of bark near base. California, 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03184 ID. Gilbert, G.K. 3184 Incense cedar, Sierra Nevada, showing crenulation of bark near base of trunk. California. 1908. #1:/Yosemite National Park/ggk03185 ID. Gilbert, G.K. 3185 Yosemite National Park, California. Young Murray pine with lacerated bark on the trail between Porcupine Flat and Yosemite Falls. The scratches were supposedly made by a bear. 1908. #1:/Yosemite National Park/ggk03186 ID. Gilbert, G.K. 3186 Yosemite National Park, California. Cloud bank above the eastern face of the Sierra Nevada. View is from the west, and the skyline includes the summits of Mount Dana and Mount Gibbs. This cloud bank extended for at least 30 miles along the edge of the mountain range and held its position for four or five days. It was not centered over the crest line of the range, but over the steep eastern slope. August 20, 1907. #1:/Gilbert1908-Gilbert G.K. Collection-Blue Point Hydraulic Mine/ggk03187 ID. Gilbert, G.K. 3187 Blue Point hydraulic mine, Smartsville, from the north. Shows large landslips. Smartsville quadrangle, Yuba County, California, ca. 1907. (Panorama with photo no. 3188) #1:/Gilbert1908-Gilbert G.K. Collection-Blue Point Hydraulic Mine/ggk03188 ID. Gilbert, G.K. 3188 Blue Point hydraulic mine, Smartsville, from the north. Shows large landslips. Smartsville quadrangle, Yuba County, California, ca. 1907. (Panorama with photo no. 3187) #1:/Gilbert1908-Gilbert G.K. Collection-Blue Point Hydraulic Mine/ggk03189 ID. Gilbert, G.K. 3189 (General Collection 2603) Landslip with step faulting. Blue Point hydraulic mine, Smartsville, looking west. The formation is lightly cemented gravel and sand. The general movement is downward to the right, the mass having parted from a cliff partly shown at the left. The step faulting by which the mass is divided had downthrow to the left, so that the subsidiary blocks near the parent cliff stand lower than those farther away. Smartsville quadrangle, Yuba County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03190 ID. Gilbert, G.K. 3190 Landslip at Smartsville. Smartsville quadrangle, Yuba County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03191 ID. Gilbert, G.K. 3191 Landslips at Smartsville, looking west. The mass at right is better shown in photo no. 3189. At left is a mass just beginning to separate from the cliff. Smartsville quadrangle, Yuba County, California. 1908 #1:/Gilbert1908-Gilbert G.K. Collection/ggk03192 ID. Gilbert, G.K. 3192 Landslip at Smartsville, initial stage. Smartsville quadrangle, Yuba County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03193 ID. Gilbert, G.K. 3193 View from the west of landslip shown in photo no. 3l89. Smartsville quadrangle, Yuba County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03194 ID. Gilbert, G.K. 3194 Landslip at Smartsville, looking west. The northeastern continuation of the mass shown in photo no. 3189. Smartsville quadrangle, Yuba County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03195 ID. Gilbert, G.K. 3195 Joints in Pliocene sand and gravel, Smartsville. Associated with landslips. Smartsville quadrangle, Yuba County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03196 ID. Gilbert, G.K. 3196 Current sculpture in old river bed, Sicard Flat. The rock is porphyrite in situ. After sculpture it was buried by the auriferous gravels (Pliocene), and was recently uncovered by hydraulic mining. The view looks downstream. Smartsville quadrangle, Yuba County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03197 ID. Gilbert, G.K. 3197 Current sculpture in old riverbed, looking downstream. Smartsville quadrangle, Yuba County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03198 ID. Gilbert, G.K. 3198 Current sculpture in old river bed, Sicard Flat. The water ran down from right to left. Smartsville quadrangle, Yuba County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03199 ID. Gilbert, G.K. 3199 Current sculpture in old river bed, Sicard Flat. The water ran from right to left. Smartsville quadrangle, Yuba County, California. 1908 #1:/Gilbert1908-Gilbert G.K. Collection/ggk03200 ID. Gilbert, G.K. 3200 Current sculpture in old river bed, Sicard Flat. The water ran from left to right. The lunate marking (1.5 inch across) is a crack made by a blow, illustrating the "conoid of percussion. Smartsville quadrangle, Yuba County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03201 ID. Gilbert, G.K. 3201 Conoid cracks made by blows. The material is vitreous porphyrite exposed in a Pliocene river channel at Sicard Flat. The blows are supposed to have been given by passing boulders. Smartsville quadrangle, Yuba County, Californis. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03202 ID. Gilbert, G.K. 3202 Hillside gullies caused by repeated breaks in a ditch near Smartsville. Smartsville quadrangle, Yuba County, California. 1908. Published as plate 19-B in U. S, Geological Survey, Professional paper 105. 1917. #1:/Gilbert1908-Gilbert G.K. Collection-Smartsville Hydraulic Mine/ggk03203 ID. Gilbert, G.K. 3203 Terraces on the south bank of Yuba River near Smartsville. Tailings from the Smartsville hydraulic mines built fans which crowded the river to the north shore, and the fans were afterward partly washed away. Smartsville quadrangle, Yuba County, California 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03204 ID. Gilbert, G.K. 3204 Narrows of Yuba River, looking upstream from the U.S. Geological Survey gaging station near Smartsville, Smartsville quadrangle, Yuba County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03205 ID. Gilbert, G.K. 3205 Up Yuba River from a point 2 miles below the Smartsville Narrows. Smartsville quadrangle, Yuba County, California. 1908. (Panorama with photo nos. 3206-3207) Photo nos. 3205-3207 form a panorama. Published as plate 6-B in U.S. Geological Survey. Professional paper 105. 1917. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03206 ID. Gilbert, G.K. 3206 Up Yuba River from a point 2 miles below the Smartsville Narrows. Smartsville quadrangle, Yuba County, California. 1908. (Panorama with photo nos. 3205,3207) Photo nos. 3205-3207 form a panorama. Published as plate 6-B in U.S. Geological Survey. Professional paper 105. 1917. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03207 ID. Gilbert, G.K. 3207 Up Yuba River from a point 2 miles below the Smartsville Narrows. Smartsville quadrangle, Yuba County, California. 1908. (Panorama with photo nos. 3205,3206) Photo nos. 3205-3207 form a panorama. Published as plate 6-B in U.S. Geological Survey. Professional paper 105. 1917. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03208 ID. Gilbert, G.K. 3208 Deer Creek 2 miles below Nevada City. The channel is filled by mining debris. At right a remnant of a fan built into the valley by debris from one of the hydraulic mines of Nevada City. Nevada County, California. May 1908. Published as plate 5-B in U.S. Geological Survey. Professional paper 105. 1917 #1:/Gilbert1908-Gilbert G.K. Collection/ggk03209 ID. Gilbert, G.K. 3209 Face of terrace of hydraulic mining debris on bank of Deer Creek near Nevada City. Nevada County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03210 ID. Gilbert, G.K. 3210 Deer Creek at Anthony House. Shows filling by mining debris. Nevada County, California, May 1908. Published as plate 1-B in U.S. Geological Survey. Professional paper 105. 1917. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03211 ID. Gilbert, G.K. 3211 Digger pine (P. sabiniana) and oak near Rough and Ready. Smartsville quadrangle, Nevada County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03212 ID. Gilbert, G.K. 3212 Digger pine (P. sabiniana), showing persistence of cones near Smartsville. Smartsville quadrangle, Yuba County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03213 ID. Gilbert, G.K. 3213 Rift topography near Lake Temescal. Berkeley Hills. The profile of a spur descending from left to right is interrupted by a fault sag which crosses at right angles. The sag is margined at the left by at cypress hedge. Alameda County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03214 ID. Gilbert, G.K. 3214 Southeastward along Hayes Valley from near Lake Temescal, Berkeley Hills. Hayes Valley is a feature of a rift belt interrupting the southwestward slope of the Berkeley Hills. Alameda County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03215 ID. Gilbert, G.K. 3215 Rift topography in Berkeley Hills. In the foreground is Lake Temescal occupying hollows created by dislocation, but has been enlarged for reservoir purposes by a dam. In the distance the skyline shows the notch occupied by Hayes Valley. The terrace in the center of the view is constituted by an earth block bounded on both sided by faults. Alameda County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03216 ID. Gilbert, G.K. 3216 A col in Hayes Valley, Berkeley Hills. This col is a fault sag crossing a spur between two stream, valleys and is on the line of the rift shown in photo nos. 3213-3219. Alameda County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03217 ID. Gilbert, G.K. 3217 Hayes Valley, Berkeley Hills, illustrating rift topography. The view looks northwestward across the intersecting valley of Shepherd Creek. Alameda County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03218 ID. Gilbert, G.K. 3218 Northwestward in the Hayes Valley rift, Berkeley Hills. The pond in the foreground is a rift feature. Alameda County, California,. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03219 ID. Gilbert, G.K. 3219 Stream valley beheaded by a fault, Berkeley Hills. The ridge descending from right to left in the more distant part of the view was originally continuous with the terrace constituting the foreground, and the sag interrupting it was made by a stream crossing both blocks. Subsequently, disturbances which created Hayes Valley rift interrupted the drainage, Alameda County, California. 1908. #1:/Gilbert1909-Gilbert G.K. Collection/ggk03220 ID. Gilbert, G.K. 3220 Penn Valley. The valley is part of a peneplain beneath which the main drainage lines of the region have been recently incised. Nevada County, California. 1909. #1:/Gilbert1909-Gilbert G.K. Collection/ggk03221 ID. Gilbert, G.K. 3221 Field near Nevada City from which the soil has been washed in consequence of over grazing. Nevada County, California. 1909" Published as plate 17-B in U.S. Geological Survey. Professional paper 105. 1917. #1:/Gilbert1909-Gilbert G.K. Collection-Esperance Hydraulic Mine/ggk03222 ID. Gilbert, G.K. 3222 Esperance hydraulic mine near French Corral. Nevada County, California. 1909. Published as plate 1-A in U.S. Geological Survey. Professional paper 105. 1917. #1:/Gilbert1909-Gilbert G.K. Collection-Esperance Hydraulic Mine/ggk03223 ID. Gilbert, G.K. 3223 Eroded boulders, Esperanee hydraulic mine, near French Corral. The boulders were part of the pavement of a sluice box through which gravel and sand were run continuously for three months, and the facets of their upper surfaces were produced by the attrition. Nevada County, California. 1909. #1:/Gilbert1909-Gilbert G.K. Collection/ggk03224 ID. Gilbert, G.K. 3224 Gold Flat placer diggings near Nevada City. Illustrates the ordinary condition in which the ground is left by placer mining, and also the slow reoccupation of the surface by vegetation after a lapse of more than twenty years. Nevada County, California. 1909. Published as plate 11-B in U.S. Geological Survey. Professional paper 105. 1917. #1:/Gilbert1909-Gilbert G.K. Collection-McCutchin Hydraulic Mine/ggk03225 ID. Gilbert, G.K. 3225 View in McCutchin hydraulic mine near Nevada City, Nevada County, California. 1909. #1:/Gilbert1909-Gilbert G.K. Collection-Badger Hill Hydraulic Mine/ggk03226 ID. Gilbert, G.K. 3226 Upper part of Badger Hill hydraulic mine near Patterson. Nevada County, California. 1909. (Panorama with photo no. 3227) #1:/Gilbert1909-Gilbert G.K. Collection-Badger Hill Hydraulic Mine/ggk03227 ID. Gilbert, G.K. 3227 Upper part of Badger Hill hydraulic mine near Patterson. Nevada County, California. 1909. Panorama with photo no. 3226) #1:/Gilbert1909-Gilbert G.K. Collection/ggk03228 ID. Gilbert, G.K. 3228 Part of north wall of great hydraulic mine at North Bloomfield. Except at the extreme right the mining operations ceased more than twenty years ago. The view illustrates the slowness with which vegetation reoccupies the surface, and also the sculpture of the gravel cliffs by atmospheric agencies. Nevada County, California. 1909. #1:/Gilbert1909-Gilbert G.K. Collection/ggk03229 ID. Gilbert, G.K. 3229 Part of north wall of great hydraulic mine at North Bloomfield. Except at the extreme right the mining operations ceased more than twenty years ago. The view illustrates the slowness with which vegetation reoccupies the surface, and also the sculpture of the gravel cliffs by atmospheric agencies. Nevada County, California. 1909. Published as plate 10-B in U.S. Geological Survey. Professional paper 105. 1917. #1:/Gilbert1909-Gilbert G.K. Collection-Murchie Mine/ggk03230 ID. Gilbert, G.K. 3230 Dam of brush and logs for the impounding of debris from hydraulic mining, Murchie mine, near Nevada City. The dam is gradually built up as the basin behind it fills with detritus. Nevada County, California. 1909. #1:/Gilbert1909-Gilbert G.K. Collection-Murchie Mine/ggk03231 ID. Gilbert, G.K. 3231 Dam of brush and logs for restraining debris from the Murchie hydraulic mine near Nevada City. Nevada County, California, 1909. Published as plate 26-A in U.S. Geological Survey. Professional paper 105. #1:/Gilbert1909-Gilbert G.K. Collection-Smartsville Hydraulic Mine/ggk03232 ID. Gilbert, G.K. 3232 Eastward from the narrows of Yuba River near Smartsville. Gravel fans at the left are built of tailings from Smartsville hydraulic mines. Yuba County, California. 1909. #1:/Gilbert1909-Gilbert G.K. Collection/ggk03233 ID. Gilbert, G.K. 3233 South Fork of Shady Creek near Patterson. The creek valley was deeply filled by tailings from hydraulic mines, and trees partly buried by the gravel were killed. Afterward the gravel deposited was partly removed, Nevada County, California. 1909. #1:/Gilbert1909-Gilbert G.K. Collection/ggk03234 ID. Gilbert, G.K. 3234 North Fork of Shady near Patterson. The creek valley was deeply filled by tailings from hydraulic mines, and trees partly buried by gravel were killed. Afterward the gravel deposited was partly removed. Nevada County, California. 1909. #1:/Gilbert1909-Gilbert G.K. Collection/ggk03235 ID. Gilbert, G.K. 3235 North Fork of Shaay near Patterson. The creek valley was deeply filled by tainings from hydraulic mines, and trees partly buried by gravel were killed. Afterward the gravel deposited was partly removed. Nevada County, California. 1909. #1:/Gilbert1909-Gilbert G.K. Collection-Esperance Hydraulic Mine/ggk03236 ID. Gilbert, G.K. 3236 Auriferous gravel (Pliocene) exposed in Esperance hydraulic mine near French Corral. The pebbles are of quartz and various igneous rocks. The igneous pebbles are so soft from decomposition as usually to crush between fingers, Nevada County, California. 1909. #1:/Gilbert1909-Gilbert G.K. Collection-Esperance Hydraulic Mine/ggk03237 ID. Gilbert, G.K. 3237 Auriferous gravel (Pliocene) exposed in Esperance hydraulic mine near French Corral. This is a horizontal continuation of the formation represented in photo no. 3236, and shows it where so near the surface as to have been disturbed by roots and burrowing animals. The softer materials are uniformly mixed, so as to constitute a practically structureless ground-mass in which the resistant quartz pebbles are embedded. Nevada County, California. 1909. #1:/Gilbert1909-Gilbert G.K. Collection/ggk03238 ID. Gilbert, G.K. 3238 Hydraulic mining at Moores Flat. In the distance the Moores Flat opening. In the foreground a portion of the Wollsey Flat opening. Nevada County, California. 1909. #1:/Gilbert1909-Gilbert G.K. Collection/ggk03239 ID. Gilbert, G.K. 3239 Part of the north wall of the great hydraulic mine at North Bloomfield. Except at the extreme right the mining operations ceased more than twenty years ago. Nevada County, California. 1909. #1:/Gilbert1909-Gilbert G.K. Collection/ggk03240 ID. Gilbert, G.K. 3240 Tailings from hydraulic mining, Shady, near Patterson. The tailings were deposited in the creek valley as an alluvial fan, and were afterward partly eroded. Trees buried by the gravels were killed, but their stumps remained erect. Nevada County, California. 1909. #1:/Gilbert1909-Gilbert G.K. Collection/ggk03241 ID. Gilbert, G.K. 3241 Tailings from hydraulic mining, Shady Creek, near Patterson. The tailings were deposited in the creek valley as an alluvial fan, and were afterward partly eroded. Trees buried by the gravels were killed, but their stumps remained erect. Nevada County, California. 1909. #1:/Gilbert1909-Gilbert G.K. Collection/ggk03242 ID. Gilbert, G.K. 3242 Tailings from hydraulic mining, Shady Creek, near Patterson. The tailings were deposited in the creek valley as an alluvial fan, and were afterward partly eroded. Trees buried by the gravels were killed, but their stumps remained erect. Nevada County, California. 1909. #1:/Gilbert1909-Gilbert G.K. Collection/ggk03243 ID. Gilbert, G.K. 3243 Northward from Mono Flat near Smartsville. The valley in middle distance is not associated with a modern stream, but is crossed by the drainage from right to left. The intersecting streams descend rapidly to the canyon of Yuba River. Yuba County, California. 1909. #1:/Gilbert1909-Gilbert G.K. Collection/ggk03244 ID. Gilbert, G.K. 3244 Up Yuba River from a point one mile above the mouth of Deer Creek. Yuba County, California. 1909. #1:/Gilbert1909-Gilbert G.K. Collection/ggk03245 ID. Gilbert, G.K. 3245 Looking down Yuba River. The mouth of Deer Creek is in middle distance on left. Yuba County, California. 1909. #1:/Gilbert1909-Gilbert G.K. Collection/ggk03246 ID. Gilbert, G.K. 3246 Earthflow and terrace, North Bloomfield. A horizontal stratum of clay in the wall of the North Bloorafield mine determines flowage in the overlying gravel and earth which creeps slowly from left to right, eventually falling over the edge of the cliff. Nevada County, California. 1909. #1:/Gilbert1909-Gilbert G.K. Collection/ggk03247 ID. Gilbert, G.K. 3247 Detail of earthflow represented in photo no. 3246. The cliff at the rear shows the undisturbed formation. In the cliff of the foreground appears the horizontal surface over which the earth flows. Nevada County, California. 1909. #1:/Gilbert1909-Gilbert G.K. Collection/ggk03248 ID. Gilbert, G.K. 3248 Surface of earthflow, North Bloomfield. Nevada County, California. 1909. #1:/Gilbert1909-Gilbert G.K. Collection/ggk03249 ID. Gilbert, G.K. 3249 Surface of earthflow, North Bloomfield. Nevada County, California. 1909. #1:/Gilbert1909-Gilbert G.K. Collection/ggk03250 ID. Gilbert, G.K. 3250 Surface of earthflow, North Bloomfield. Nevada County, California. 1909. #1:/Gilbert1909-Gilbert G.K. Collection/ggk03251 ID. Gilbert, G.K. 3251 Surface of earthflow, North Bloomfield. Nevada County, California. 1909. #1:/Gilbert1909-Gilbert G.K. Collection-Wollsey Flat Hydraulic Mine/ggk03252 ID. Gilbert, G.K. 3252 Earthflow, Wollsey Flat hydraulic mine near Moores Flat. The mine excavation exposes several horizontal beds of impervious clay, and each of these determines flowage of the overlying formations. Nevada County, California. 1909. #1:/Gilbert1909-Gilbert G.K. Collection-Wollsey Flat Hydraulic Mine/ggk03253 ID. Gilbert, G.K. 3253 The foreground shows surface of a terrace produced by earthflow at the Wollsey Flat mine. Nevada County, California, 1909. #1:/Gilbert1909-Gilbert G.K. Collection/ggk03254 ID. Gilbert, G.K. 3254 Earthflow at Blue Tent, A field, supposed to have been previously smooth, is thrown into undulation by a general flow of underlying gravels, the flow being occasioned by hydraulic mining. Nevada County, California. 1909 #1:/Gilbert1909-Gilbert G.K. Collection/ggk03255 ID. Gilbert, G.K. 3255 Earthflow or landslide on the uphill side of the great hydraulic mine at North Bloomfield, The moving tract includes all the foreground and a strip of the woodland. As a result of the movement the surface is rendered irregular, portions being tilted in various directions. These directions are suggested by the overthrowing and tilting of trees, as well as by the uplifted ridge in the foreground. Nevada County, California. 1909 #1:/Gilbert1909-Gilbert G.K. Collection/ggk03256 ID. Gilbert, G.K. 3256 Steep slope of granite soil deprived of vegetation by over grazing, but not eroded in gullies, altitude 7,400 feet. Near Tamarack Creek, Sierra Nevada. Kaiser quadrangle, Fresno County, California, ca. 1909. #1:/Gilbert1909-Gilbert G.K. Collection/ggk03257 ID. Gilbert, G.K. 3257 Pine (P. jeffreyi), showing uplift of rocks by growth of roots, Sierra Nevada. Fresno County, California, ca. 1909. #1:/Gilbert1909-Gilbert G.K. Collection/ggk03258 ID. Gilbert, G.K. 3258 Pine (P. jeffreyi), showing uplift of rocks and soil by growth of roots, Sierra Nevada. Fresno County, California, ca. 1909 #1:/Gilbert1908-Gilbert G.K. Collection/ggk03259 ID. Gilbert, G.K. 3259 Potholes, South Fork of San Joaquin River, above Blaney Meadows, Sierra Nevada. Fresno County, California, 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03260 ID. Gilbert, G.K. 3260 Potholes in granite, Dana Creek, near Tuolumne Meadows, Sierra Nevada. Mariposa County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03261 ID. Gilbert, G.K. 3261 Potholes in granite, Dana, near Tuolumne Meadows, Sierra Nevada, Mariposa County, California, 1908 #1:/Gilbert1908-Gilbert G.K. Collection/ggk03262 ID. Gilbert, G.K. 3262 Potholes in granite, Dana Creek, near Tuolumne Meadows, Sierra Nevada. Mariposa County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03263 ID. Gilbert, G.K. 3263 View up Long Meadow on South Fork of Big Creek. In the distance is Black Peak, a volcanic neck, typical of many similar extrusions through rifts in the granite batholith of the Sierra Nevada. The angular blocks of granite in the meadow were dropped by a glacier which once filled the valley to within a few hundred feet of the top of Black Peak. Kaiser quadrangle, California. 1908. Published as figure 47 in U.S. Geological Survey. Professional paper 329. 1960. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03264 ID. Gilbert, G.K. 3264 Moraine high on south wall of valley overlooking west end of Blaney Meadow. Valley of South Fork of San Joaquin River, Sierra Nevada. The moraine is one of a series of laterals separated from its neighbor by an alluvial valley. Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03265 ID. Gilbert, G.K. 3265 Southeastward from trail descending from Mono Creek Pass, east side. Sierra Nevada. Mount Goddard quadrangle, Inyo County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03266 ID. Gilbert, G.K. 3266 Southeastward from trail descending from Mono Creek Pass, east side Mount Abbott in distance at right, Sierra Nevada. Mount Goddard quadrangle, Inyo County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03267 ID. Gilbert, G.K. 3267 Northwestward from Mono Pass, Sierra Nevada. Mount Goddard quadrangle, Fresno County, California, 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03268 ID. Gilbert, G.K. 3268 Eastward up Evolution Canyon, showing Darwin Crest with Mount Darwin (flat top) a little to right of center. South Fork of San Joaquin River, Sierra Nevada. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03269 ID. Gilbert, G.K. 3269 Northwestward from Saddle Mountain, in northeast corner of Kaiser quadrangle, showing Mount Ritter in distance at right. Sierra Nevada. Kaiser quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03270 ID. Gilbert, G.K. 3270 Southward from butte on divide between Evolution Basin, southwest end, and Goddard Basin, southeast end, showing Goddard Glacier. Headwaters of South Fork of San Joaquin River, Sierra Nevada. Sequoia and Kings Canyon National Park. Mount Goddard quadrangle, Fresno County, California. August 13, 1908. (Panorama with photo no. 3271) #1:/Gilbert1908-Gilbert G.K. Collection/ggk03271 ID. Gilbert, G.K. 3271 Southward from butte on divide between Evolution Basin, southwest end, and Goddard Basin, southeast end, showing Goddard Glacier. Headwaters of South Fork of San Joaquin River, Sierra Nevada. Sequoia and Kings Canyon National Park. Mount Goddard quadrangle, Fresno County, California. August 13, 1908. (Panorama with photo no. 3270) #1:/Kings Canyon National Park/ggk03272 ID. Gilbert, G.K. 3272 Kings Canyon National Park, California. South in Darwin Canyon, showing Mount Darwin and the east end of Darwin Glacier. August 14, 1908. Photos ggk0372, ggk0373, and ggk0374 form a panorama. #1:/Kings Canyon National Park/ggk03273 ID. Gilbert, G.K. 3273 Kings Canyon National Park, California. South in Darwin Canyon, showing Mount Darwin and the east end of Darwin Glacier. August 14, 1908. Photos ggk0372, ggk0373, and ggk0374 form a panorama. #1:/Kings Canyon National Park/ggk03274 ID. Gilbert, G.K. 3274 Kings Canyon National Park, California. South in Darwin Canyon, showing Mount Darwin and the east end of Darwin Glacier. August 14, 1908. Photos ggk0372, ggk0373, and ggk0374 form a panorama. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03275 ID. Gilbert, G.K. 3275 Southward in Darwin Canyon showing little Darwin Glacier in recess next west from main Drawin Glacier, Sierra Nevada. Mount Godard quadrangle, Sequoia and Kings Canyon National Park. Fresno county, California, August 14, 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03276 ID. Gilbert, G.K. 3276 Snow-bank glaciers (?) at head of Gibbs Canyon (draining westward to Mono Lake), northeast slope of Mount Gibbs, Sierra Nevada. Mount Lyell quadrangle, Mono County, California. August 27, 1908. #1:/Yosemite National Park/ggk03277 ID. Gilbert, G.K. 3277 Yosemite National Park, California. Dana Glacier occupies the shaded side of a cirque cut by a much larger glacier of the ice age. At its front are several moraine ridges composed of rock debris. 1903. Plate 28-B, U.S. Geological Survey Professional Paper 160. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03278 ID. Gilbert, G.K. 3278 Cirques of the south wall of canyon of South Fork of San Joaquin River at Blaney Meadows. Terraces and horizontal (?) jointing in granite, Sierra Nevada. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03279 ID. Gilbert, G.K. 3279 A cirque on the south wall of canyon of South Fork of San Joaquin River at Blaney Meadows, Sierra Nevada. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03280 ID. Gilbert, G.K. 3280 Cirque on the west wall of Rock Creek Canyon (draining to Owens River), Sierra Nevada, Mount Goddard quadrangle, Inyo County, California. 1908. #1:/Yosemite National Park/ggk03281 ID. Gilbert, G.K. 3281 Yosemite National Park, California. Sharp cut cirques in the granite mass of Cathedral Peak. The cirque on the left opens due north. Tuolumne Meadows Drainage. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03282 ID. Gilbert, G.K. 3282 A "pass" across the Sierra Nevada crest; glacial canyon without cirque wall at head. Glacial drainage was across pass from beyond divide toward observer. Sapline cliffs midway up left wall. Southwestward up Bloody Canyon from east end of Walker Lake, Walker Creek (Mono Lake drainage), Sierra Nevada. Mount Lyell quadrangle, Mono County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03283 ID. Gilbert, G.K. 3283 Cirque head showing sapline with pedestal slope (plated) below and cliff of sapping above. Head of Survival Alcove, Evolution Basin, Sierra Nevada. Sequoia and Kings Canyon National Park, Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Yosemite National Park/ggk03284 ID. Gilbert, G.K. 3284 Yosemite National Park, California. Cirques with convex floors at Kuna Crest. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03285 ID. Gilbert, G.K. 3285 Step in glacial canyon determined by structure; ponding behind resistant ledge; "rock-basin lake". Ledge crosses canyon diagonally; parallel zone of yielding on up-canyon side indicated by "chimneys" on extensions of the line in both canyon walls. Eastward from cirque head down Gibbs Canyon (into Mono Valley), Sierra Nevada. Mount Lyell quadrangle, Mono County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03286 ID. Gilbert, G.K. 3286 Step in glacial canyon determined by structure. View is across canyon into an alcove. Canyon descends from right to left; descent of step just beginning on left. Southward across Bloody Canyon (draining to Mono Valley), Sierra Nevada. Mount Lyell quadrangle, Mono County, California. 1908. #1:/Kings Canyon National Park/ggk03287 ID. Gilbert, G.K. 3287 Kings Canyon National Park, California. Arˆte, on north-south line, connecting residuals of earlier topographic surface. Inosculating cirques of canyons in the east-west line (canyon heading beyond arˆte, visible from Mount Darwin). View is east up a recess tributary to Darwin Canyon on the north. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03288 ID. Gilbert, G.K. 3288 Remnant of ancient topography: flat top of Darwin Crest, north end. Eastward up Darwin Canyon. Chain of rock-basin lakes. In distance, canyon turns abruptly to right and heads in cirque of Darwin Glacier. In foreground, canyon of equal length enters from left, and this canyon and Darwin Canyon both step down to a trunk canyon extending to right. Sierra Nevada, Sequoia and Kings Canyon National Park. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03289 ID. Gilbert, G.K. 3289 Remnant of ancient topography. Northward from Mono Creek Pass, along main crest of range, Sierra Nevada. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03290 ID. Gilbert, G.K. 3290 Ancient topography. Southward, up Fourth Recess, south side of Mono Creek Canyon. Distant glacier at left. At right, a remnant of earlier topography undercut by the glacier which occupied the recess. Sierra Nevada. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03291 ID. Gilbert, G.K. 3291 Ancient topography. Southward in Rock Creek Canyon (tributary to Owens Valley), showing east wall of strong glacial erosion cut into an earlier topography of eastward drainage. Sierra Nevada, Mount Goddard quadrangle, Inyo County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03292 ID. Gilbert, G.K. 3292 Ancient topography. Glacial topography with an earlier (pre-glacial?) topography, Mono Pass. Sierra Nevada, Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03293 ID. Gilbert, G.K. 3293 Ancient topography. Glacial topography contrasted with an earlier (pre-glacial?) topography. Mount Gibbs, north side, showing head of Gibbs Canyon (extending eastward into Mono Valley. (Sierra Nevada, Mount Lyell quadrangle, Mono County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03294 ID. Gilbert, G.K. 3294 Eastward up Survival Alcove, Evolution Basin. Sierra Nevada, Sequoia and Kings Canyon National Park. Mount Goddard quadrangle, Fresno County, California, 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03295 ID. Gilbert, G.K. 3295 Head of Survival Alcove. Illustrated sapline (glacial) about head of lake; also, sapping (wave work or frost work?) at edge of lake. Evolution Basin, Sierra Nevada. Sequoia and Kings Canyon National Park. Mount Goddard quadrangle, Fresno County, California. 1908. (Panorama with photo nos. 3296-3297) #1:/Gilbert1908-Gilbert G.K. Collection/ggk03296 ID. Gilbert, G.K. 3296 Cirque and lake at head of Survival Alcove. The sapline at extreme head of cirque (right) is lower than on wall to left. Evolution Basin, Sierra Nevada. Mount Goddard quadrangle, Fresno County, California. 1908. (Panorama with photo nos. 3295, 3297) #1:/Gilbert1908-Gilbert G.K. Collection/ggk03297 ID. Gilbert, G.K. 3297 Sapline and associated terrace, Darwin Crest, Survival Alcove. Evolution Basin, Sierra Nevada. Mount Goddard quadrangle, Fresno County, California. 1908. (Panorama with photo nos. 3295-3296) #1:/Gilbert1908-Gilbert G.K. Collection/ggk03298 ID. Gilbert, G.K. 3298 Sapline and associated terrace. Terrace is here broad enough to support large talus cones. North wall of Survival Alcove. Evolution Basin, Sierra Nevada. Sequoia and Kings Canyon National Park. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03299 ID. Gilbert, G.K. 3299 Sapline and associated terrace. Northeastward, showing flat top of Mount Darwin. Darwin Crest extending to right. Survival Alcove, Evolution Basin, Sierra Nevada. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03300 ID. Gilbert, G.K. 3300 Sapline and associated terrace, north side of Survival Alcove near its junction with Evolution Basin. Skyline is Darwin Crest, Sierra Nevada. Sequoia and Kings Canyon National Park. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03301 ID. Gilbert, G.K. 3301 Granite spur, south side of Survival Alcove, near its junction with Evolution Basin, Sierra Nevada. Sequoia and Kings Canyon National Park. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03302 ID. Gilbert, G.K. 3302 Pavement in bed of Evolution . Northward in upper Evolution Basin. Also shows sapline, but without the prominent associated terrace of views photo nos. 3298-3300. Straight elements of crest above sapline in a line parallel with sapline, suggesting the possibility of sharp dissection without deformation, of ancient topography of less relief, Sierra Nevada. Sequoia and Kings Canyon National Park. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03303 ID. Gilbert, G.K. 3303 Pavement in bed of Evolution , looking upstream, southward. In distance, east half of Goddard Glacier. Sequoia and Kings Canyon National Park. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03304 ID. Gilbert, G.K. 3304 Pavement in bed of Evolution Creek. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03305 ID. Gilbert, G.K. 3305 Pavement in bed of Evolution . Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03306 ID. Gilbert, G.K. 3306 Terrace on right (north) wall of Darwin Canyon, from butte at foot of Darwin Glacier. The canyon, opening northward at head, here turns abruptly westward. Sierra Nevada, Sequoia and Kings Canyon National Park. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03307 ID. Gilbert, G.K. 3307 Sapline at entrance to Fourth (?) Recess, Mono Creek Canyon, Sierra Nevada. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03308 ID. Gilbert, G.K. 3308 Sapline at entrance to Fourth (?) Recess, Mono Creek Canyon, Sierra Nevada. Old surface residual on left. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03309 ID. Gilbert, G.K. 3309 Sapline in close-jointed granite near head of Mono Creek Canyon, Sierra Nevada. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03310 ID. Gilbert, G.K. 3310 Description of group: Eastward up Evolution Valley, showing canyon within canyon; Mount Darwin in distance at right (flat top); Evolution Valley (both outer and inner canyons) "hangs" at its junction with Goddard Canyon, which it joins at right angles along the foreground. Evolution Valley above the junction, however, has the larger drainage basin and a longer line of high crest. Sierra Nevada, Sequoia and Kings Canyon National Park. Mount Goddard quadrangle, Fresno County, California. 1908. (Panorama with photos no. 3311-3313) #1:/Gilbert1908-Gilbert G.K. Collection/ggk03311 ID. Gilbert, G.K. 3311 Description of group: Eastward up Evolution Valley, showing canyon within canyon; Mount Darwin in distance at right (flat top); Evolution Valley (both outer and inner canyons) "hangs" at its junction with Goddard Canyon, which it joins at right angles along the foreground. Evolution Valley above the junction, however, has the larger drainage basin and a longer line of high crest. Sierra Nevada, Sequoia and Kings Canyon National Park. Mount Goddard quadrangle, Fresno County, California. 1908. (Panorama with photo nos. 3310, 3312-3313). #1:/Gilbert1908-Gilbert G.K. Collection/ggk03312 ID. Gilbert, G.K. 3312 Description of group: Eastward up Evolution Valley, showing canyon within canyon; Mount Darwin in distance at right (flat top); Evolution Valley (both outer and inner canyons) "hangs" at its junction with Goddard Canyon, which it joins at right angles along the foreground. Evolution Valley above the junction, however, has the larger drainage basin and a longer line of high crest. Sierra Nevada, Sequoia and Kings Canyon National Park. Mount Goddard quadrangle, Fresno County, California. 1908. (Panorama with photo nos. 3310-3311, 3313). #1:/Gilbert1908-Gilbert G.K. Collection/ggk03313 ID. Gilbert, G.K. 3313 Description of group: Eastward up Evolution Valley, showing canyon within canyon; Mount Darwin in distance at right (flat top); Evolution Valley (both outer and inner canyons) "hangs" at its junction with Goddard Canyon, which it joins at right angles along the foreground. Evolution Valley above the junction, however, has the larger drainage basin and a longer line of high crest. Sierra Nevada, Sequoia and Kings Canyon National Park. Mount Goddard quadrangle, Fresno County, California. 1908. (Panorama with photo nos. 3310-3312). #1:/Gilbert1908-Gilbert G.K. Collection/ggk03314 ID. Gilbert, G.K. 3314 Northwestward down Goddard Canyon from a little below junction of Evolution Canyon, showing overlapping spurs. These are minor spurs of the floor. Sierra Nevada, Sequoia and Kings Canyon National Park. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03315 ID. Gilbert, G.K. 3315 Westward in lower end of Evolution Canyon close to junction with Goddard Canyon (which crosses in middle ground from left to right), showing Panorama Butte, looking up Evolution Canyon. The butte was overtopped by maximum glaciation; direction of movement southeast to northwest. Sierra Nevada, Sequoia and Kings Canyon National Park. Mount Goddard quadrangle, Fresno County, California. 1908. (Panorama with photo no. 3326) #1:/Gilbert1908-Gilbert G.K. Collection/ggk03316 ID. Gilbert, G.K. 3316 Northwestward down Goddard (south branch) Canyon, showing Pavilion spur-end dome at junction of Goddard Canyon and Piute (north branch) Canyon, South Fork of San Joaquin River, four miles east of Blaney Meadows. The junction of the two creeks is off the view to the left; Piute Creek enters at upper right, passing across view at near foot of dome. Sierra Nevada, Sequoia and Kings Canyon National Park. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03317 ID. Gilbert, G.K. 3317 Northward in Evolution Basin, showing Evolution Lake (outlet at left in middle distance) and northwest end of Darwin Crest (on right. (Sierra Nevada, Sequoia and Kings Canyon National Park. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03318 ID. Gilbert, G.K. 3318 Eastward up Mono Creek Canyon, showing First (?) Recess (high hanging valley on right) and entrances to Second, Third, and Fourth Recesses, beyond. Shows, also, sapline (at right) with sapped cliff above and, below, sloping pedestal of plated granite, with talus. Sierra Nevada. Mount Goddard quadrangle, Fresno County, California. 1908. Published as figure 43 in U.S. Geological Survey, Professional paper 329. 1960. #1:/Yosemite National Park/ggk03319 ID. Gilbert, G.K. 3319 Yosemite National Park, California. Southward across Dana Fork Canyon, showing the north end of Kuna Crest. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03320 ID. Gilbert, G.K. 3320 Vermillion Cliffs north side of Mono Canyon. Close-jointed granite. Moraines are lodged (just off photograph at left) nearly as high as the summit. Sierra Nevada. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03321 ID. Gilbert, G.K. 3321 Northward down valley of South Fork of San Joaquin River, showing Jackass Flats and Jackass Dike. Sierra Nevada. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Yosemite National Park/ggk03322 ID. Gilbert, G.K. 3322 Yosemite National Park, California. Eastward up Merced Canyon, viewed from Clouds Rest. Canyon within a canyon. The inner canyon shows overlapping spurs. 1908. #1:/Yosemite National Park/ggk03323 ID. Gilbert, G.K. 3323 Yosemite National Park, California. Eastward up Merced Canyon, viewed from Moraine Dome, showing strong bends in the canyon course among the domes. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03324 ID. Gilbert, G.K. 3324 Two of three hanging valleys which enter at head of main trough of Evolution Canyon; the third, Darwin Canyon, enters behind observer. The Hermit (peak is just off the view to right. The view is southward into Hermit Alcove, the left hand tributary. The central tributary is Evolution Basin; its sill is just visible at extreme left. The outlet end of Evolution Lake shows at head of the Slissate Falls. The third, or right hand tributary (Darwin Canyon) opens opposite to Hermit Alcove behind the observer. Sierra Nevada, Sequoia and Kings Canyon National Park. Mount Goddard quadrangle, Fresno County, California. 1908. (Panorama with photo no. 3325) #1:/Gilbert1908-Gilbert G.K. Collection/ggk03325 ID. Gilbert, G.K. 3325 Two of three hanging valleys which enter at head of main trough of Evolution Canyon; the third, Darwin Canyon, enters behind observer. The Hermit (peak is just off the view to right. The view is southward into Hermit Alcove, the left hand tributary. The central tributary is Evolution Basin; its sill is just visible at extreme left. The outlet end of Evolution Lake shows at head of the Slissate Falls. The third, or right hand tributary (Darwin Canyon) opens opposite to Hermit Alcove behind the observer. Sierra Nevada, Sequoia and Kings Canyon National Park. Mount Goddard quadrangle, Fresno County, California. 1908. (Panorama with photo no. 3324) #1:/Gilbert1908-Gilbert G.K. Collection/ggk03326 ID. Gilbert, G.K. 3326 Hanging valley and water-cut trench, both apparently showing vertical structure control. Westward, from sill of Evolution Canyon, across Goddard Canyon, showing Panorama Butte on right. Sierra Nevada, Sequoia and Kings Canyon National Park. Mount Goddard quadrangle, Fresno County, California. 1908. Panorama with photo no. 3315) #1:/Gilbert1908-Gilbert G.K. Collection/ggk03327 ID. Gilbert, G.K. 3327 Hanging valley, west wall of Goddard Canyon, next in order down-canyon (northward. (Sierra Nevada, Sequoia and Kings Canyon National Park. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03328 ID. Gilbert, G.K. 3328 Hanging valley, west wall of Ousel Canyon, a tributary of Evolution Canyon, Sierra Nevada. Sequoia and Kings Canyon National Park. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03329 ID. Gilbert, G.K. 3329 Hanging valley, south wall of Mono Creek Canyon. The "Third? Recess." Sierra Nevada. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03330 ID. Gilbert, G.K. 3330 Hanging valley, south wall of Mono Creek Canyon, Sierra Nevada. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03331 ID. Gilbert, G.K. 3331 Hanging valley, south wall of Mono Creek Canyon. The "First ? Recess." Sierra Nevada. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03332 ID. Gilbert, G.K. 3332 Hanging valley sill. Ousel alcove floor hanging above Evolution Canyon, south wall. Slissate Falls of Ousel Creek, Sierra Nevada. Sequoia and Kings Canyon National Park. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03333 ID. Gilbert, G.K. 3333 Hanging valley. Part of sill of Ousel alcove from south side of Evolution Canyon. Westward down Evolution Canyon, Sierra Nevada. Sequoia and Kings Canyon National Park. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03334 ID. Gilbert, G.K. 3334 Hanging valley. Part of sill (in foreground) of Survival Alcove opening to Evolution Basin from the east. Southward, showing in distance, Mount Goddard at right and Mount Huxley at left. Sierra Nevada. Mount Goddard quadrangle, Fresno County, California, 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03335 ID. Gilbert, G.K. 3335 Moraine. Westward, down valley of South Fork of San Joaquin River, showing high built terrace (moraine) on right and cut terrace in distance, on left. From point above Blaney Meadows. Sierra Nevada. Mount Goddard quadrangle, Fresno County, California. 1908. (Panorama with photo no. 3336) #1:/Gilbert1908-Gilbert G.K. Collection/ggk03336 ID. Gilbert, G.K. 3336 Moraine. Westward, down valley of South Fork of San Joaquin River, showing high built terrace (moraine) on right and cut terrace in distance, on left. From point above Blaney Meadows. Sierra Nevada. Mount Goddard quadrangle, Fresno County, California. 1908. (Panorama with photo no. 3335) #1:/Gilbert1908-Gilbert G.K. Collection/ggk03337 ID. Gilbert, G.K. 3337 Moraine. High moraine terrace, north side of valley of South Fork of San Joaquin River above Double Meadow, three miles below Blaney Meadows hot spring, Sierra Nevada. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03338 ID. Gilbert, G.K. 3338 Shows moraines (left hand laterals) of lower end of Rock Canyon a little above its junction with Owens Valley. East flank of Sierra Nevada. Mount Morrison quadrangle, Mono County, California. 1908. (Panorama with photo no. 3339) #1:/Gilbert1908-Gilbert G.K. Collection/ggk03339 ID. Gilbert, G.K. 3339 Shows moraines (left hand laterals) of lower end of Rock Canyon a little above its junction with Owens Valley. East flank of Sierra Nevada. Mount Morrison quadrangle, Mono County, California. 1908. (Panorama with photo no. 3338) #1:/Gilbert1908-Gilbert G.K. Collection/ggk03340 ID. Gilbert, G.K. 3340 Terminal moraine swinging to left across broad floor of Vermillion Valley from right-hand lateral, rear of Mono Canyon, Sierra Nevada. Direction of glacier movement from left to right. Mount Goddard quadrangle, Fresno County, California. 1908. Published as figure 41 in U.S. Geological Survey. Professional paper 329. 1960. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03341 ID. Gilbert, G.K. 3341 Right lateral moraine near lower end of Rock Creek Canyon. East flank of Sierra Nevada. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Yosemite National Park/ggk03342 ID. Gilbert, G.K. 3342 Yosemite National Park, California. Dome topography southeastward across Merced Canyon, showing granite slopes rising to Mount Clark. 1908. #1:/Yosemite National Park/ggk03343 ID. Gilbert, G.K. 3343 Yosemite National Park, California. Dome topography southwestward across Merced Canyon, showing granite slopes rising to Mount Starr King. 1908. #1:/Yosemite National Park/ggk03344 ID. Gilbert, G.K. 3344 Yosemite National Park, California. Dome topography southwestward across Merced Canyon, showing granite slopes rising to Mount Starr King. 1908. #1:/Yosemite National Park/ggk03345 ID. Gilbert, G.K. 3345 Yosemite National Park, California. Dome topography southwestward across Merced Canyon, showing granite slopes rising to Mount Starr King. 1908. #1:/Yosemite National Park/ggk03346 ID. Gilbert, G.K. 3346 Yosemite National Park, California. Lembert Dome northeastward, viewed from Tuolumne Meadows. 1908. #1:/Yosemite National Park/ggk03347 ID. Gilbert, G.K. 3347 Yosemite National Park, California. Half Dome, westward down Yosemite Valley, viewed from Clouds Rest. 1908. #1:/Yosemite National Park/ggk03348 ID. Gilbert, G.K. 3348 Yosemite National Park, California. Westward down Merced Valley. Moraine Dome on the left in the middle distance. West slope of Clouds Rest on the right. In the distance, Half Dome on the right and Glacier Point upland 1908. #1:/Yosemite National Park/ggk03349 ID. Gilbert, G.K. 3349 Yosemite National Park, California. From Moraine Dome in Merced Canyon westward: Half Dome on the right, Liberty Gap and Mount Broderick in the middle ground, Glacier Point upland beyond, and El Capitan through the notch in the extreme distance. 1908. Photos ggk03349 and ggk03350 form a panorama. #1:/Yosemite National Park/ggk03350 ID. Gilbert, G.K. 3350 Yosemite National Park, California. From Moraine Dome in Merced Canyon westward: Half Dome on the right, Liberty Gap and Mount Broderick in the middle ground, Glacier Point upland beyond, and El Capitan through the notch in the extreme distance. 1908. Photos ggk03349 and ggk03350 form a panorama. #1:/Yosemite National Park/ggk03351 ID. Gilbert, G.K. 3351 Yosemite National Park, California. Westward in Merced Canyon, showing v-notch between Liberty Cap and Mount Broderick. 1908. Photos ggk03351 and ggk03352 form a panorama. #1:/Yosemite National Park/ggk03352 ID. Gilbert, G.K. 3352 Yosemite National Park, California. Westward in Merced Canyon, showing v-notch between Liberty Cap and Mount Broderick. 1908. Photos ggk03351 and ggk03352 form a panorama. #1:/Yosemite National Park/ggk03353 ID. Gilbert, G.K. 3353 Yosemite National Park, California. Wall of aplite on Moraine Dome. The 7- foot wall is formed by a vertical dike of aplite and has remained standing because the aplite disintegrates much more slowly than the surrounding granite. The height of the wall affords a minimum measure of the depth to which the granite has been stripped away since the earlier ice passed over and smoothed the crown of the dome. 1903. Plate 37-A, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/ggk03354 ID. Gilbert, G.K. 3354 Yosemite National Park, California. Cathedral Peak, viewed from the west. 1908. #1:/Yosemite National Park/ggk03355 ID. Gilbert, G.K. 3355 Yosemite National Park, California. Cathedral Peak, viewed from Cathedral Pass, showing cut terrace. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03356 ID. Gilbert, G.K. 3356 Westward, down South Fork of San Joaquin. Details of moutonnee forms on floor of valley. Ice movement was away from observer. Sierra Nevada. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03357 ID. Gilbert, G.K. 3357 Glacial abrasion. Ice movement toward observer. Scorings show deflections of glacial current in detail. Joint block plucking here the dominant erosional process; moutonnee forms but slightly developed. South face, near summit on granite knob, about 1,000 feet above Double Meadow, just west of Blaney Meadow, valley of South Fork of San Joaquin River, Sierra Nevada. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03358 ID. Gilbert, G.K. 3358 (General Collection 1601) Glacial abrasion. Sinuous scoring along line of weakness in granite. Ice movement from right to left. South face near summit on granite knob, about 1,000 feet above Double Meadow just west of Blaney Meadow, valley of South Fork of San Joaquin River, Sierra Nevada. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03359 ID. Gilbert, G.K. 3359 Glacial abrasion. Polish on resistant aplite dike in granite. Ice movement from right to left. Shows sharp angular changes in direction of movement in detail. South face near summit on granite knob, about 1,000 feet above Double Meadow just west of Blaney Meadow, valley of South Fork of San Joaquin River, Sierra Nevada. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03360 ID. Gilbert, G.K. 3360 Roches moutonnees. Floor of canyon of South Fork of San Joaquin River, upper end of Blaney Meadows. Ice movement left to right. Sierra Nevada. Mount Goddard quadrangle, Fresno County, California. 1908. Published as figure 40 in U.S. Geological Survey. Professional paper 329. 1960. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03361 ID. Gilbert, G.K. 3361 Roches moutonnees. Floor of canyon of South Fork of San Joaquin River, upper end of Blaney Meadows, Sierra Nevada. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03362 ID. Gilbert, G.K. 3362 Roches moutonnees forms imposed on granite dome. Floor of canyon of South Fork of San Joaquin River below Blaney Meadows, Ice movement left to right. Sierra Nevada. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03363 ID. Gilbert, G.K. 3363 Roches moutonnees. Abrasion dominant over plucking. Floor of canyon of South Fork of San Joaquin River, below Blaney Meadows. Ice movement left to right. Sierra Nevada. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03364 ID. Gilbert, G.K. 3364 Roches moutonnees on floor of canyon of South Fork of San Joaquin River below Blaney Meadows, Sierra Nevada. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03365 ID. Gilbert, G.K. 3365 Roches moutonnees. Ice movement directly away from observer. An arm of Evolution Lake at left, northwest end of Darwin Crest at right. Northward down Evolution Basin, headwaters of South Fork of San Joaquin River, Sierra Nevada. Sequoia and Kings Canyon National Park. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03366 ID. Gilbert, G.K. 3366 Roches moutonnees. Ice movement directly toward observer. Southward in Evolution Basin. Shows south wall of Survival Alcove in central distance; next to right is spur. Sierra Nevada, Sequoia and Kings Canyon National Park. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03367 ID. Gilbert, G.K. 3367 Roche moutonnee. In middle distance in shadow, a moutonnee form, long in the direction of glacier movement (left to right). As in the basin generally, the rock is granite. The moutonnee form is close-jointed transversely; there is approximately longitudinal jointing also, but less closely spaced. By such a joint system quarrying would seem to be favored especially; yet abrasion in a late stage of degradation at least has been the prominent process. Dome structure is not sensibly developed. Breaking down on the moderately steep face toward observer has been post-glacial, as shown by the joint-block talus. It has occurred by mere gravity. Is the transverse jointage possibly post-glacial? Dilatation from unloading by degradation having waited upon glacial unloading? In distance "chimneys" with post-glacial talus cones. Westward across north (lower) end of Evolution Basin, Sierra Nevada. Sequoia and Kings Canyon National Park. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03368 ID. Gilbert, G.K. 3368 Glacial plucking. Left to right abrasion, cross jointage, and plucking (favored by jointage) on right or lee side. Valley of South Fork of San Joaquin River, Sierra Nevada. Sequoia and Kings Canyon National Park. Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03369 ID. Gilbert, G.K. 3369 Glacial plucking. Step cliff below sill of hanging valley; direction of ice movement toward observer. Abrasive rounding after joint block removal. Post-glacial fracture and displacement (at right) of abraded floor blocks. Eastward up Darwin Canyon, Sierra Nevada. Sequoia and Kings Canyon National Park, Mount Goddard quadrangle, Fresno County, California, 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03370 ID. Gilbert, G.K. 3370 Glacial plucking. Joint block removed by lifting. Dimensions and height of lift in Gilbert notes. Eastward (Mount Huxley in distance) on crest of ridge west of Evolution Basin, Sierra Nevada. Sequoia and Kings Canyon National Park. Mount Goddard quadrangle, Fresno County, California. 1908. Published as figure 28 in U.5. Geological Survey. Professional paper 329. 1960. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03371 ID. Gilbert, G.K. 3371 Glacial plucking. Southward in upper Evolution Basin. Direction of glacier movement toward observer. Lee side of moutonnee granite mass on basin floor, showing cross-cliff plucking. Hollow, with arched top in cliff face seemingly undergoing enlargement by snow-bank action, similar to glacier-head erosion, by sapping, in glacial cirque. In distance, at right, the east end of Goddard Glacier. Sequoia and Kings Canyon National Park, Sierra Nevada. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Yosemite National Park/ggk03372 ID. Gilbert, G.K. 3372 Yosemite National Park, California. "Chimney" - vertical trench across granite spur, following shear zone(?), located 1.5 miles northwest of Cathedral Peak on the Tuolumne-Merced Divide. Cliff is the right wing of a glacial cirque; trench, on same course, crosses the left wing of the cirque. The cirque faces west. Dome structure developed on the cliff on the left. 1908. See also photo ggk03373. #1:/Yosemite National Park/ggk03373 ID. Gilbert, G.K. 3373 Yosemite National Park, California. "Chimney" - vertical trench in the foreground following shear zone(?) in granite, located 1.5 miles northwest of Cathedral Peak on the Tuolumne-Merced Divide. Cliff is the left wing of a glacial cirque, opening to the right. Southward, the high point on the left is Columbia Finger. 1908. See also photo ggk03372. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03374 ID. Gilbert, G.K. 3374 Cut terraces in granite determined by joints with horizontal strike. Southward from Blaney Meadows, valley of South Fork of San Joaquin River, Sierra Nevada. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03375 ID. Gilbert, G.K. 3375 High "gravel" of the Sierra. This occurrence specially noted by I.C. Russell, Quaternary History of Mono Valley, p. 322. Dana Plateau, about one mile northeast from Mount Dana; elevation, 11, 800 feet. Northeastward, showing Paoha Island (white patch) in Mono Lake, Sierra Nevada. Mount Lyell quadrangle, Mono County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03376 ID. Gilbert, G.K. 3376 Glacial erratics on low, broad dome, floor of valley of South Fork of San Joaquin River, between Twin Meadows and Jackass Flats, Sierra Nevada, Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03377 ID. Gilbert, G.K. 3377 Perched granite boulder, 10' x 12', Survival Alcove, Evolution Basin, Sierra Nevada. Sequoia and Kings Canyon National Park, Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Yosemite National Park/ggk03378 ID. Gilbert, G.K. 3378 Yosemite National Park, California. Large erratic boulder on Moraine Dome. The boulder is composed of Cathedral Peak Granite, readily recognized by the big feldspar crystals that project from its surface. It measures 12 by 6 by 5 feet and is perched on a pedestal 3 feet high. The pedestal consists of a remnant of a shell detached by exfoliation from the body of the dome.G.K. Gilbert is standing by the boulder. Photo by E.C. Andrews. 1903. Plate 37-B, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/ggk03379 ID. Gilbert, G.K. 3379 Yosemite National Park, California. Westward across Little Yosemite Valley, viewed from Moraine Dome.E.C. Andrews on a perched boulder. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03380 ID. Gilbert, G.K. 3380 Glacial boulder breaking down. On the high moraine, north side of canyon of South Fork San Joaquin River above Twin Meadows, Sierra Nevada. Mount Goddard quadrangle, Fresno County, California. 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03381 ID. Gilbert, G.K. 3381 Erratic glacial boulder. Westward (down canyon) in center of flat floor of Mono Canyon, a little below First Recess, Sierra Nevada. Mount Goddard quadrangle, Fresno County, California. 1908. Published as figure 46 in U.S. Geological Survey. Professional paper 329. 1960. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03382 ID. Gilbert, G.K. 3382 Uplift of rock by growth of tree roots, Sierra Nevada, California.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03383 ID. Gilbert, G.K. 3383 Terrace: residual of post-glacial dissection of fluvio-glacial deposit, behind moraines, in Vermillion Valley, Mono Creek Canyon. Northward, showing north wall of canyon (granite, in place, with light covering of morainic debris. (Sierra Nevada, Mt. Goddard quadrangle, Fresno County, California, n.d. #1:/Yosemite National Park/ggk03384 ID. Gilbert, G.K. 3384 Yosemite National Park, California. Feldspar crystal (center) in granite, retaining glacial polish and striae, on Tuolumne-Merced Divide at an altitude of 9,900 feet, 1.5 miles northwest of Cathedral Peak.. The rock surface is horizontal. The surface of the crystal is about 0.25 inch in relief above the weathered surface. #1:/Yosemite National Park/ggk03385 ID. Gilbert, G.K. 3385 Yosemite National Park, California. Glacial polish on porphyritic granite - an approximately horizontal surface - on Tuolumne-Merced Divide at an altitude of 9,900 feet, 1.5 miles northwest of Cathedral Peak. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03386 ID. Gilbert, G.K. 3386 Fault scarp. Southward in Long Valley, headwaters of Owens River, Sierra Nevada. Mt. Morrison quadrangle, Mono County, California n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03387 ID. Gilbert, G.K. 3387 Contact of intrusive granite with metamorphic rock, Evolution Canyon, South Fork San Joaquin River, Sierra Nevada. Mt. Goddard quadrangle, Fresno County, California.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03388 ID. Gilbert, G.K. 3388 West edge of lava plateau surrounding Mono Crater. The plateau at this Mono Valley Nevada. Mt. Lyell quadrangle, Mono County, California.n.d. #1:/Yosemite National Park/ggk03389 ID. Gilbert, G.K. 3389 Yosemite National Park, California. Eastward up Merced Canyon, viewed from the summit of Liberty Cap in Little Yosemite Valley. #1:/Yosemite National Park/ggk03390 ID. Gilbert, G.K. 3390 Yosemite National Park, California. Camp on the Tuolumne-Merced Divide 1 mile north of Cathedral Lake. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03391 ID. Gilbert, G.K. 3391 Crib dam on Spring Creek, 1 mile below North Columbia. The dam was built to impound debris from hydraulic mining, and served its purpose for several years. It failed in 1907, from the washing out of its gravel and rock Nevada County, California, October 27, 1908. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03392 ID. Gilbert, G.K. 3392 Crib dam on Spring Creek, 1 mile below North Columbia. The dam was built to impound debris from hydraulic mining, and served its purpose for several years. It failed in 1907, from the washing out of its gravel and rock filling. Nevada County, California. October 27, 1908. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03393 ID. Gilbert, G.K. 3393 Brush dam on Spring Creek, 1 mile below North Columbia. This dam is a few rods above the earth darn represented in no. 3391. Nevada County, California, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03394 ID. Gilbert, G.K. 3394 Mining debris deposited above a restraining dam in Horse Valley, near the head of Willow Creek, 1 mile from Camptonville, Yuba County, California.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03395 ID. Gilbert, G.K. 3395 Hydraulic mining pits at North Columbia, The pit in the foreground is known as "The Consolidated"; in the distance, at left, is the "Union Diggings"; at right the "Sailor Flat" nine. Nevada County, California, n.d. #1:/San Francisco, California, Earthquake April 18, 1906/ggk03400 ID. Gilbert, G.K. 3400 San Francisco, California, Earthquake April 18, 1906. Train thrown down by the earthquake at Point Reyes Station. The train was standing on a siding. Beyond are the buildings of the Point Reyes Hotel and, on the extreme right, the ruin of a stone store which was shaken down. 1906. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03401 ID. Gilbert, G.K. 3401 Hog Hill, Choate Island, Essex River. View from Castle Neck. Dunes in foreground. Gloucester quadrangle, Essex County, Massachusetts, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03402 ID. Gilbert, G.K. 3402 Remnant of dune with sea cliff, Choate Island. The cliff face is now protected from ocean waves by a spit-Castle Neck. Gloucester quadrangle, Essex County, Massachusetts, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03403 ID. Gilbert, G.K. 3403 Carious erosion of granite. Twopenny Loaf, mouth of Essex River. The peculiar sculpture is limited to a horizontal zone just above high tide and having a vertical range of several feet. Gloucester quadrangle, Essex County, Massachusetts, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03404 ID. Gilbert, G.K. 3404 Sand ripples formed under water and exposed at low tide. Bar at mouth of Squam River, Cape Ann, Looking toward the land. The oar is 7 feet long. Gloucester quadrangle, Essex County, Massachusetts, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03405 ID. Gilbert, G.K. 3405 Sand ripples formed under water and exposed at low tide. Bar at mouth of Squam River, Cape Ann. Looking toward the land. The oar is 7 feet long. Gloucester quadrangle, Essex County, Massachusetts, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03406 ID. Gilbert, G.K. 3406 Sand ripples formed at mouth of Squam River, Cape Ann. Looking toward the outer end of the bar. There are two patterns of rippling, the smaller superposed on the larger. This view was taken one day later than the views of 3404 and 3405. Compare also 3407. Gloucester quadrangle, Essex County, Massachusetts, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03407 ID. Gilbert, G.K. 3407 Sand ripples at mouth of Squam River, Cape Ann. Looking toward outer end of bar. View taken two days later than the view in 3406. Shows further progress in the substitution of ripples of small pattern for ripples of larger. Gloucester quadrangle, Essex County, Massachusetts, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03408 ID. Gilbert, G.K. 3408 Apparatus of the U.S.G.S. Hydraulic Laboratory on the campus of the University of California, n.d. #1:/Idaho/ggk03409 ID. Gilbert, G.K. 3409 Idaho. Artemisia tridentata at Red Rock Pass(?). The tree effect was obtained by placing the camera on the ground. #1:/Idaho/ggk03410 ID. Gilbert, G.K. 3410 Idaho. Outlet channel of Lake Bonneville at Red Rock Pass, viewed from the north. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03411 ID. Gilbert, G.K. 3411 Profile showing Bonneville shore line; looking south; one mile south of Logan Canyon, Cache Valley. An arroyo separates the foreground from the profile. The water hose was near the bases of the upper power line poles. The point here shown is at left of the center of F and at extreme left is G. Logan quadrangle, Cache County, Utah. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03412 ID. Gilbert, G.K. 3412 Bonneville and Provo shore lines, on face of Wasatch Range near Kaysville. Davis County, Utah. #1:/Gilbert1901-Gilbert G.K. Collection/ggk03413 ID. Gilbert, G.K. 3413 Bonneville shore line on east wall of Cache Valley. At right is Logan Canyon. A delta plain built by Logan River at Provo water stage was afterward dissected and terraced by the river. Logan quadrangle, Cache County, Utah. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk03414 ID. Gilbert, G.K. 3414 Bonneville shore line on east wall of Cache Valley. Looking southeast from a point east of Logan. Logan quadrangle, Cache County, Utah. Published as plate 1-A in U.S. Geological Survey. Professional paper 153- 1928. #1:/Gilbert1901-Gilbert G.K. Collection/ggk03415 ID. Gilbert, G.K. 3415 Bonneville shore line on east wall of Cache Valley. Logan quadrangle, Cache County, Utah. 1901 #1:/Gilbert1901-Gilbert G.K. Collection/ggk03416 ID. Gilbert, G.K. 3416 West front of the Wasatch Range bounding Cache Valley on the east. Looking southeast from an old delta plain near Logan. Illustrates the physiography of a "block mountain" (Davis) face where the bounding fault has low dip. The base of the face is slightly modified by Bonneville waves. Logan quadrangle, Cache County, Utah. 1901 #1:/Gilbertnd-Gilbert G.K. Collection/ggk03418 ID. Gilbert, G.K. 3418 West face of Wasatch Range north of Ogden Canyon. The low spur at right of center exhibits the Provo shore line and (less clearly) the Bonneville. A large alluvial fan at left of it is crossed by a fault scarp. Weber County, Utah.n.d. Published as plate 12-B in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03419 ID. Gilbert, G.K. 3419 Fault scarps at base of Wasatch Range, one-half mile south of Ogden Canyon. The steel-truss tower near center of view stands on the block between the scarps. The rounding of the lower scarp indicates that it is older than the upper. Both are newer than the Bonneville shore lines. The mountain face from center to right is of quartzite and is a fault face little modified by weathering. It carries slickensides. Weber County, Utah.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03420 ID. Gilbert, G.K. 3420 Slickensides on quartzite of the faulted (west) face of the Wasatch Range. On photo no. 3419 this detail occurs about one inch from the right-hand edge. Weber County, Utah, n.d. Published as plate 2-B in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03421 ID. Gilbert, G.K. 3421 Slickensides on quartzite of the faulted (west) face of the Wasatch Range. On no. 3419 this detail occurs about one-fourth inch from the right-hand edge. Weber County, Utah, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03422 ID. Gilbert, G.K. 3422 Fault scarps on foot slope of Wasatch Range, north of Ogden Canyon, which appears at the right. Weber County, Utah.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03423 ID. Gilbert, G.K. 3423 Profile of Mineral Range. Looking northward along the west face. Beaver County, Utah.n.d. (Panorama with photo no. 2424) #1:/Gilbertnd-Gilbert G.K. Collection/ggk03424 ID. Gilbert, G.K. 3424 Profile of Mineral Range. Looking northward along the west face. Beaver County, Utah.n.d. (Panorama with photo no. 2423) #1:/Gilbertnd-Gilbert G.K. Collection/ggk03425 ID. Gilbert, G.K. 3425 Profile of a facet of the west face of Mineral Range. The facet is sheathed by a plate of fault-rock, and its slope is that of a fault outlining part of the western face of the range. Beaver County, Utah.n.d. (Panorama with photo no. 3426). #1:/Gilbertnd-Gilbert G.K. Collection/ggk03426 ID. Gilbert, G.K. 3426 Profile of a facet of the west face of Mineral Range. The facet is sheathed by a plate of fault-rock, and its slope is that of a fault outlining part of the western face of the range. Beaver County, Utah.n.d. (Panorama with photo no. 3425). #1:/Gilbertnd-Gilbert G.K. Collection/ggk03427 ID. Gilbert, G.K. 3427 Slickensides in the fault-rock shown in no. 3425-3426. Beaver County, Utah.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03428 ID. Gilbert, G.K. 3428 Fault scarp in alluvium. West base of Mineral Range. The scarp is not fresh, but old. Beaver County, Utah, n.d. #1:/Gilbert1916-Gilbert G.K. Collection/ggk03429 ID. Gilbert, G.K. 3429 North part of Plum Ridge escarpnent; looking north from road 4 miles N of Klamath falls. The west face of the ridge is a fault scarp, graded, after the faulting, to a slope of 34 degrees. Klamath County, Oregon. 1916. #1:/Gilbert1916-Gilbert G.K. Collection/ggk03430 ID. Gilbert, G.K. 3430 Southward from near north end of Plum Ridge escarpment. Profile of scarp at left; Upper Klamath Lake at right. Compare 3429. Klamath County, Oregon. 1916. #1:/Gilbert1916-Gilbert G.K. Collection/ggk03431 ID. Gilbert, G.K. 3431 Slickensided fault face. West base of Plum Ridge escarpment. The polished surface passes under talus at the farther and lower edges. Overlaps 3430. Compare 3432 and 3433. Klamath County, Oregon. 1916. #1:/Gilbert1916-Gilbert G.K. Collection/ggk03432 ID. Gilbert, G.K. 3432 Slickensided fault face 100 feet above base of Plum Ridge. The face is terminated upward by erosion; its farther and lower edges pass under alluvium. Compare 3429, 3431 and 3433. Klamath County, Oregon. 1916. #1:/Gilbert1916-Gilbert G.K. Collection/ggk03433 ID. Gilbert, G.K. 3433 Portion of slickensided surface shown in 3432. The striation is vertical. The material is an uncemented breccia of basalt, backed by basaltic bedrock. Klamath County, Oregon. 1916. #1:/Gilbert1916-Gilbert G.K. Collection/ggk03434 ID. Gilbert, G.K. 3434 "Fault splinter" on the face of Modoc fault scarp, near Algoma, Oregon. Looking east. The splinter is a wooded hill, central in the view. At right is the dip slope of a small block-fault hill. Klaraath County, Oregon. 1916. #1:/Gilbert1916-Gilbert G.K. Collection/ggk03435 ID. Gilbert, G.K. 3435 Modoc escarpment, a fault scarp, near Modoc Point. Looking north. At left Upper Klamath Lake. Klamath County, Oregon. 1916. #1:/Gilbert1916-Gilbert G.K. Collection/ggk03436 ID. Gilbert, G.K. 3436 The Modoc escarpment, a fault scarp facing west toward Upper Klamath Lake. Looking NE and N from near Lelu. Klamath County, Oregon. 1916. (Panorama with photo no. 3437). #1:/Gilbert1916-Gilbert G.K. Collection/ggk03437 ID. Gilbert, G.K. 3437 The Modoc escarpment, a fault scarp facing west toward Upper Klamath Lake. Looking NE and N from near Lelu. Klamath County, Oregon. 1916. (Panorama with photo no. 3436). #1:/Gilbert1916-Gilbert G.K. Collection/ggk03438 ID. Gilbert, G.K. 3438 The north end of Long Lake Valley, southern Oregon, from the south, Klamath County. 1916. #1:/Gilbert1916-Gilbert G.K. Collection/ggk03439 ID. Gilbert, G.K. 3439 Fault-block ridges south of Upper Klamath Lake. Looking NW. The nearer ridge shows dip slope toward the west. Klamath County, Oregon. 1916. #1:/Gilbert1916-Gilbert G.K. Collection/ggk03440 ID. Gilbert, G.K. 3440 West face of Sierra Nevada, near Bakersfield. Looking SE, across the mouth of the lower canyon of Kern River. The contact between granite and talus is a fault plane; dip 59 degrees. Above the talus the scarp is degraded to about the talus slope of 34 degrees. Kern County, California. 1916. Published as plate 39-A in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbert1916-Gilbert G.K. Collection/ggk03441 ID. Gilbert, G.K. 3441 West face of Sierra Nevada, near Bakersfield. Looking SE, across the mouth of the lower canyon of Kern River. The contact between granite and talus is a fault plane; dip 59 degrees. Above the talus the scarp is degraded to about the talus slope of 34 degrees. Kern County, California. 1916. #1:/Gilbert1916-Gilbert G.K. Collection/ggk03442 ID. Gilbert, G.K. 3442 Fault scarp on SW face of Sierra Nevada, 1/2 mile NW of Kern River. Looking SE. The face of granite, though weathered, has traces of Slickensides. Compare 3440 and 3443. Kern County, California. 1916. Published as plate 39-B in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbert1916-Gilbert G.K. Collection/ggk03443 ID. Gilbert, G.K. 3443 Fault scarp on SW face of Sierra Nevada, 1 mile NW of Kern River. Looking NW. The steep granite face marks the footwall of the fault. Compare 3441 and 3442. Kern County, California. 1916. Published as plate 40-A in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbert1916-Gilbert G.K. Collection/ggk03444 ID. Gilbert, G.K. 3444 Looking SE along the SW face of Sierra Nevada 4 miles N of Kern River. A fault separates granite (at left) from soft beds of Temblor formation, Marine Miocene (at right). Compare 3444. Kern County, California. 1916. #1:/Gilbert1916-Gilbert G.K. Collection/ggk03445 ID. Gilbert, G.K. 3445 Bluff on Kern River 12 miles east of Bakersville. The bluff is dissected by drainage originating on its face, and the intervening spurs, sapped by the river, end in triangular facets. Kern County, California. 1916. Published as plate 23-B in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03446 ID. Gilbert, G.K. 3446 West front of Wasatch Range; looking south from Provo. A facetted escarpment of simple contour. Utah County, Utah.n.d. Published as plate 19-B in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03447 ID. Gilbert, G.K. 3447 West front of Wasatch Range, north of Provo Canyon; looking northeast. The range here has two ridges with a sag between. The main ridge is Timpanogos Crest. The sag drains across the front ridge through gash canyons, the walls of which are sharply distinct from the facetted front. The larger canyon is that of Battle Creek. Utah County, Utah.n.d. Published as plate 21-A in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03448 ID. Gilbert, G.K. 3448 West front of Wasatch Range; looking southeast from near Alpine. The facetted front is divided by the canyon of American Fork. The snowy peak is Timpanogos. Utah County, Utah.n.d. Published as plate 21-B in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03449 ID. Gilbert, G.K. 3449 West front of Wasatch Range; looking northeast from Provo. At left Provo Canyon and the Timpanogos Wasatch. At right, Rock Canyon. Utah County, Utah.n.d. Published as plate 20-A in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03450 ID. Gilbert, G.K. 3450 Summits of Wasatch Range south of Weber Canyon, looking southeast. Shows remnants of graded plains. Foreground, north remnant of delta built by Weber River in Lake Bonneville. Weber County, Utah.n.d. Published as plate 24-B in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03451 ID. Gilbert, G.K. 3451 Panorama of west front of Wasatch Range, from a point between Pleasant View and Utah Hot Springs. Looking northeast. Hamlet of Pleasant View near center. Weber County., Utah.n.d. (Panorama with photo nos. 3452-3454) Published as plate 9-A in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03452 ID. Gilbert, G.K. 3452 Looking east-northeast. Ben Lomond Peak (Willard Peak of 40th Par.). Front swings from southerly trend to easterly. Foreground, quartzite crags on low tabular spur. Weber County, Utah.n.d. (Panorama with photo nos. 3451, 3453, 3454) Published as plate 24-A in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03453 ID. Gilbert, G.K. 3453 Looking east. Front swings from easterly trend to southerly. Pale bands are quartzite, probably Cambrian quartzite separated by faulting. Weber County, Utah.n.d. (Panorama with photo nos. 3451-3452, 3454) #1:/Gilbertnd-Gilbert G.K. Collection/ggk03454 ID. Gilbert, G.K. 3454 Looking east. North Ogden Canyon, which heads in Eden Pass. Weber County, Utah.n.d. (Panorama with photo nos. 3451-3453). #1:/Gilbertnd-Gilbert G.K. Collection/ggk03455 ID. Gilbert, G.K. 3455 West front of Wasatch Range from point 2 miles north of Willard; looking south. A facetted escarpment of simple contour but varied structure. The dark formation at left is Algonkian, overthrust on Cambrian (Blackwelder). Box Elder County, Utah, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03456 ID. Gilbert, G.K. 3456 West front of Wasatch Range from point 1 mile north of Willard. Box Elder County, Utah.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03457 ID. Gilbert, G.K. 3457 West front of Wasatch Range from near Brigham; looking south. The exceptionally subdued sculpture is associated with rocks mapped by Black-welder as Algonkian. Bonneville and Provo shore lines. Box Elder County, Utah.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03458 ID. Gilbert, G.K. 3458 West front of Wasatch Range from near Brigham; looking north. The more distant shore line is the Provo. Box Elder County, Utah, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03459 ID. Gilbert, G.K. 3459 A facet of the Wasatch front north of Rock Canyon, near Provo. Utah County, Utah, n.d. Published as plate 20-B in U. S, Geological Survey. Professional paper 153. 1928. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03460 ID. Gilbert, G.K. 3460 Southward across mouth of Mill Creek Canyon, Wasatch Range. The canyon wall is craggy; the face of the range, seen in profile, is smooth - the facet of an escarpment created by faulting. At base of the facet are cliffs of Bonneville shore line. The rock of the foreground at right is a quartzite breccia, the shear zone of the frontal fault of the range. Compare 1825 and 3461. Utah.n.d. Published as plate 4-B in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03461 ID. Gilbert, G.K. 3461 North wall of Mill Creek Canyon, Wasatch Range, at mouth, showing a greatly disturbed rock mass, part of the shear zone of the frontal fault of the range. It is a breccia, with included blocks of strata. Utah, n.d. Published as plate 3-A in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03462 ID. Gilbert, G.K. 3462 North wall of Mill Creek Canyon, Wasatch Range, near mouth. Paleozoic strata, dipping steeply into the canyon wall, end at left against a sheared mass, which contains blocks of similar strata. Utah.n.d. Published as plate 3-B in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03463 ID. Gilbert, G.K. 3463 Slickensides in shear zone at mouth of Mill Creek Canyon. A detail of 3461. Utah.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03464 ID. Gilbert, G.K. 3464 Slickensides in shear zone at mouth of Mill Creek Canyon. A detail of 3463. Utah.n.d. Published as plate 4-A in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03465 ID. Gilbert, G.K. 3465 West front of Wasatch Range south of Ogden Canyon. The escarpment runs obliquely across the strike. At right is a wedge of Archean gneiss, obscured by talus. An outcrop of Cambrian quartzite descends from right to left and ends at the rock base. Weber County, Utah.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03466 ID. Gilbert, G.K. 3466 West front of Wasatch Range north of Jump-off Canyon. The lighter colored formation is Cambrian quartzite, dipping eastward. Its outcrop descends toward the rock base at the left, where it is overlain by a mass of sheared quartzite, a feature of the frontal fault. Compare with 3467. Utah.n.d. Published as plate 6-B in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03467 ID. Gilbert, G.K. 3467 End of quartzite outcrop shown in 3466, as seen from the north. The formation dips to the left and is succeeded by shale and limestone. Its face at the right is covered by a body of sheared quartzite, which has been attacked by waves of Lake Bonneville, making a shore cliff. Utah, n.d. Published as plate 6-A in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03468 ID. Gilbert, G.K. 3468 Southward along west face of Wasatch Range near Willard. An outcrop of Cambrian quartzite (light-colored) descends to rock base, striking toward the observer and dipping east. Below it are Archean gneisses; above it, in the peak, limestones. At left are Algonquian rocks, overthrust from the east. Their outcrop appears dark, and the line separating it from the nearer part of the quartzite is the outcrop of the Willard overthrust (of Black-welder). The west face of quartzite, near the rock base, is covered by breccia of the frontal fault of the range. See 3469. Box Elder County, Utah. n.d. Published as plate 7-B in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03469 ID. Gilbert, G.K. 3469 Fault breccia of the frontal fault of Wasatch Range near Millard. See 3468. Box Elder County, Utah. n.d. #1:/Alaska Glaciers/ggk0346a ID. Gilbert, G.K. 346a Alaska Glaciers. On Columbia Glacier, which is southwest of Valdez in the Chugach Mountains. Harriman Expedition, June 26, 1899. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03470 ID. Gilbert, G.K. 3470 Pseudo-anticline in Cambrian quartzite, near Willard. The structure planes dipping to the left are of bedding; those inclined to the right are the product of shearing. The camera was turned up. The ravine is on the line of the Willard overthrust. Box Elder County, Utah. n.d. Published as plate 7-A in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03471 ID. Gilbert, G.K. 3471 West front of Wasatch Range north of North Ogden. At the left, below the Bonneville shore line, is a weathered piedmont scarp. The white band crossing the scarp, and some white patches farther to the right, are outcrops of a quartzite gouge of the frontal fault of the range. Weber County, Utah, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03472 ID. Gilbert, G.K. 3472 At left a granite salient of the Wasatch Range near Draper. At right trachyte of the traverse spur, Corner Creek, follows the groin between them. The Bonneville shore line is scored on the granite and, less clearly, on the trachyte. The foreground is a delta plain of the creek made at the Provo stage of the lake. The plain is crossed, from left to the creek, by a piedmont scarp. Salt Lake County, Utah.n.d. Published as plate 11-A in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03473 ID. Gilbert, G.K. 3473 Piedmont scarp on north division of delta built by Weber River at Provo stage of Lake Bonneville. The snowy mountains (Wasatch) are beyond Weber Canyon. (See 3450). Weber County, Utah.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03474 ID. Gilbert, G.K. 3474 Piedmont scarp on north division of delta built by Weber River at Provo stage of Lake Bonneville. Higher on the spurs of the range (Wasatch) are terraces of the Bonneville shore. The earth block below the scarp is in part tilted toward the scarp. Weber County, Utah.n.d. Published as plate 15-B in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03475 ID. Gilbert, G.K. 3475 Piedmont scarp crossing alluvial fan of Taylor Creek at mouth of Taylor Canyon, Wasatch Range, near Ogden. Weber County, Utah.n.d. Published as plate 9-B in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03476 ID. Gilbert, G.K. 3476 Mouth of Ogden Canyon, Wasatch Range, from the north. The walls of the canyon are of tough gneiss. They are rough as compared with the adjacent west face of the gneiss, which is part of the footwall of the frontal fault of the range. The foreground and the benches beyond the river are parts of the delta of the river in Lake Bonneville. The alluvial benches are crossed by three piedmont scarps, of which the upper is conspicuous. Compare 3419. Weber County, Utah.n.d. Published as plate 8-B in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03477 ID. Gilbert, G.K. 3477 Piedmont scarps at base of Wasatch Range north of Ogden Canyon. Weber County, Utah, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03478 ID. Gilbert, G.K. 3478 Piedmont scarps at base of Wasatch Range north of Ogden Canyon. Ogden River in foreground. Weber County, Utah.n.d. (Panorama with no. 3479). #1:/Gilbertnd-Gilbert G.K. Collection/ggk03479 ID. Gilbert, G.K. 3479 Piedmont scarps at base of Wasatch Range north of Ogden Canyon; Ogden River in foreground. The pair of scarps at right are shown in nearby 3480; and the single scarp about the spur at right of center, in 3481 and 3482. Weber County, Utah.n.d. (Panorama with photo no. 3478). #1:/Gilbertnd-Gilbert G.K. Collection/ggk03480 ID. Gilbert, G.K. 3480 Piedmont scarps north of Ogden Canyon, Wasatch Range. Compare 3479. Weber County, Utah.n.d. Published as plate 15-A in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03481 ID. Gilbert, G.K. 3481 Piedmont scarp at south base of spur of Wasatch Range shown in and 3479. Weber County, Utah.n.d. Published as plate 18-A in U.S. Geological Survey. Professional paper 153- 1928. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03482 ID. Gilbert, G.K. 3482 Piedmont scarp at north base of spur of Wasatch Range shown in 3418 and 3479. Weber County, Utah.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03483 ID. Gilbert, G.K. 3483 Landslides on the north face of a bench near Madsen Station, north of Honeyville. Box Elder County, Utah.n.d. Published as plate 12-A in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03484 ID. Gilbert, G.K. 3484 Landslide scarp and sag near Uintah. The formation is a delta built in Lake Bonneville by Weber River. The pond has been enlarged by means of a dam. Weber County, Utah.n.d. (Panorama with photo no. 3485). Published as plate 17-A in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03485 ID. Gilbert, G.K. 3485 Landslide near Uintah, Weber County, Utah.n.d. (Panorama with photo no. 3484). Published as plate 17-A in U.S. Geologocal Survey. Professional paper 153. 1928. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03486 ID. Gilbert, G.K. 3486 Landslides near Ogden. Wasatch Range and Ogden Canyon in distance. The formation is a delta built by Ogden River in Lake Bonneville and since divided by the river. Weber County, Utah.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03487 ID. Gilbert, G.K. 3487 Scarp at base of Wasatch Range opposite Honeyville. It is thought that the table on which part of the town stands may be a landslide corresponding to this scarp. Box Elder County, Utah.n.d. Published as plate 11-B in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03488 ID. Gilbert, G.K. 3488 Saddle between Lone Peak salient of Wasatch Range (at right) and traverse spur (at left). The hills this side the saddle are of landslide type. The granite of the salient shows foliation, supposed to be a feature of the footwall of the frontal fault of the range. Utah County, Utah.n.d. Published as plate 10-A in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03489 ID. Gilbert, G.K. 3489 Panorama. Valley of Provo River between Wasatch Range and a western foothill. The terrace is an alluvial fan from the range, which was conditioned by a base level higher than the present. Compare Utah County, Utah.n.d. (Panorama with photo no. 3490). #1:/Gilbertnd-Gilbert G.K. Collection/ggk03490 ID. Gilbert, G.K. 3490 Panorama. Valley of Provo River between Wasatch Range and a western foothill. The terrace is an alluvial fan from the range, which was conditioned by a base level higher than the present. Compare Utah County, Utah.n.d. (Panorama with photo no. 3490). Published as plate 27-B in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03491 ID. Gilbert, G.K. 3491 Canyon of Provo River in Wasatch Range; looking downstream from near head of canyon. Note V form and compare with 3489-3490, and 3492. Published as plate 27-A in U.5. Geological Survey. Professional paper 153. 1928. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03492 ID. Gilbert, G.K. 3492 North wall of Provo Canyon, under Timpanogos Peak; looking west. Compare long alluvial slope with features of 3491. Utah County, Utah, n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03493 ID. Gilbert, G.K. 3493 North wall of Provo Canyon, Wasatch Range, under Timpanogos Peak. The west-facing cliffs are probably a fault scarp (S.F. Emmons). There is another fault on the line of the steep gulley at the right. The two ridges crossed by the flume are landslide blocks from a ridge outside the view. Utah County, Utah.n.d. Panorama with photo no. 3494) Published as plate 30-A in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03494 ID. Gilbert, G.K. 3494 North wall of Provo Canyon, Wasatch Range, under Timpanogos Peak. The west-facing cliffs are probably a fault scarp (S.F. Emmons). There is another fault on the line of the steep gulley at the right. The two ridges crossed by the flume are landslide blocks from a ridge outside the view. Utah County, Utah.n.d. Panorama with photo no. 3493) Published as plate 30-A in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03495 ID. Gilbert, G.K. 3495 South wall of Provo Canyon, Wasatch Range. Camera turned up. The fold marks the boundary between two large blocks of strata. Utah County, Utah.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03496 ID. Gilbert, G.K. 3496 Hanging valley and waterfall; south wall of Provo Canyon, Wasatch Range. Utah County, Utah.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03497 ID. Gilbert, G.K. 3497 Alternation of strata of limestone and limy shale, showing rhythm in conditions of deposition. South wall of Provo Canyon, Wasatch Range. Utah County, Utah.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03498 ID. Gilbert, G.K. 3498 Mouth of Weber Canyon, Wasatch Range. On the ridge at right is a remnant of a graded plain, and the next ridge is rounded at top. Both appear to be capped by regolith or alluvium. The walls of the intervening gulley are steep, indicating a lowering of base level, and the sculpture of the river gorge walls is youthful. Weber County, Utah. 1901. Published as plate 25-B in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03499 ID. Gilbert, G.K. 3499 Weber Canyon, Wasatch Range, near middle; looking upstream (east). From a side canyon at right two remnants of alluvial fans slope steeply, toward the river. The upper corresponds approximately to the Bonneville shore line. The lower corresponds accurately with the Provo shore line. The river was crowded by these deposits against the north wall of its canyon, and when the lake level fell the river channel was locally superimposed on the north wall, in which it cut the short narrow gorge called Devils Gate. The railway grade cuts through the alluvial filling of the pre-Provo Canyon. See 3500. Weber County (?), Utah.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03500 ID. Gilbert, G.K. 3500 Devils Gate, Weber Canyon, Wasatch Range. See 3499 and title. Beyond the rock terrace of the foreground is seen a part of the Bonneville alluvial fan from the side canyon. Weber County (?), Utah.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03501 ID. Gilbert, G.K. 3501 Heber Valley, an opening east of the Wasatch Range, traversed by Provo River. The town of Heber is seen on the aggraded plain of the valley. Beyond it is Daniels Canyon. Wasatch County, Utah.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03502 ID. Gilbert, G.K. 3502 Margin of the plain of Heber Valley, showing its relation to bordering upland. A hill topography shaped when the base level was lower is drowned by aggradation. The view looks northeast from a point 2 miles southwest of Charleston. Wasatch County, Utah.n.d. Published as plate 26-A in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03503 ID. Gilbert, G.K. 3503 The south end, or head, of Morgan Valley, looking south from near Morgan. An aggraded valley plain. Morgan County, Utah.n.d. Published as plate 26-B in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03504 ID. Gilbert, G.K. 3504 Circle Valley. The erosion valley of Weber River is locally widened between passes through hills of resistant limestone. Unconformable contact of Carboniferous limestones with Eocene conglomerates and sandstones. Weber or Morgan County, Utah.n.d. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03505 ID. Gilbert, G.K. 3505 Panorama of Mantua Valley; looking NW from south end of valley. At left, head of canyon of Box Elder Creek through Wasatch Range. Distant summit, Box Elder (or Wellsville) Peak. Village of Mantua (formerly Copenhagen; post office, Geneva). Box Elder County, Utah.n.d. (Panorama with photo nos. 3506, 3507). #1:/Gilbertnd-Gilbert G.K. Collection/ggk03506 ID. Gilbert, G.K. 3506 Panorama of Mantua Valley; looking NW from south end of valley. At left, head of canyon of Box Elder Creek through Wasatch Range. Distant summit, Box Elder (or Wellsville) Peak. Village of Mantua (formerly Copenhagen; post office, Geneva). Box Elder County, Utah.n.d. (Panorama with photo nos. 3505, 3507). #1:/Gilbertnd-Gilbert G.K. Collection/ggk03507 ID. Gilbert, G.K. 3507 Panorama of Mantua Valley; looking NW from south end of valley. At left, head of canyon of Box Elder Creek through Wasatch Range. Distant summit, Box Elder (or Wellsville) Peak. Village of Mantua (formerly Copenhagen; post office, Geneva). Box Elder County, Utah.n.d. (Panorama with photo nos. 3505, 3506). #1:/Gilbertnd-Gilbert G.K. Collection/ggk03508 ID. Gilbert, G.K. 3508 Panorama of Mantua Valley; looking south-southeast from north end of valley. Village of Mantua. The east side of Wasatch Range. Box Elder County, Utah.n.d. (Panorama with photo nos 3509, 3510). #1:/Gilbertnd-Gilbert G.K. Collection/ggk03509 ID. Gilbert, G.K. 3509 Panorama of Mantua Valley; looking south-southeast from north end of valley. Village of Mantua. The east side of Wasatch Range. Box Elder County, Utah.n.d. (Panorama with photo nos 3508, 3510). #1:/Gilbertnd-Gilbert G.K. Collection/ggk03510 ID. Gilbert, G.K. 3510 Panorama of Mantua Valley; looking south-southeast from north end of valley. Village of Mantua. The east side of Wasatch Range. Box Elder County, Utah.n.d. (Panorama with photo nos 3508, 3509). #1:/Gilbertnd-Gilbert G.K. Collection/ggk03511 ID. Gilbert, G.K. 3511 East face of Wasatch Range south of Dry Lake, looking west-northwest. The lower ridge is peculiar in that, trending east-west, it is composed of inclined strata that strikes northeast-southwest. Cache County, Utah. 1901 (Panorama with photo no. 3512). #1:/Gilbertnd-Gilbert G.K. Collection/ggk03512 ID. Gilbert, G.K. 3512 East face of Wasatch Range south of Dry Lake; looking northwest. The lower ridge is peculiar in that, trending east-west, it is composed of inclined strata that strikes northeast-southwest. Box Elder (or Wellsville) Peak. Cache County, Utah.n.d. (Panorama with photo no. 3511). #1:/Gilbert1901-Gilbert G.K. Collection/ggk03513 ID. Gilbert, G.K. 3513 Eden Pass, Wasatch Range, from the SE. The pass is an "air gap", the channel of a stream formerly crossing the range westward from Ogden Valley. Weber County, Utah. ca. 1901. Panorama with photo nos. 353A, 3515). Published as plate 28 in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbert1901-Gilbert G.K. Collection/ggk03514 ID. Gilbert, G.K. 3514 East front of Wasatch Range, facing Ogden Valley north of Liberty. Weber County, Utah. 1901. Panorama with photo nos. 3513, 3515). Published as plate 28 in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbert1901-Gilbert G.K. Collection/ggk03515 ID. Gilbert, G.K. 3515 Eden Pass, Wasatch Range, from the SE. The pass is an "air gap", the channel of a stream formerly crossing the range westward from Ogden Valley. Weber County, Utah. ca. 1901. Panorama with photo nos. 353A, 3513). Published as plate 28 in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbert1901-Gilbert G.K. Collection/ggk03516 ID. Gilbert, G.K. 3516 Eden Pass, Wasatch Range. The view looks east from near the summit of the pass. Across Ogden Valley is Bear River Plateau. See 3513. Weber County, Utah. 1901. Published as plate 30-B in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbertnd-Gilbert G.K. Collection/ggk03517 ID. Gilbert, G.K. 3517 Heteroceras nebrascense. A fossil shell occurring in the Tepee zone of the Pierre shale and best preserved in concretions. This specimen, which includes two-thirds of the whole individual, is more nearly complete than the specimens usually found. Fragments 3 or 4 inches in length are comparatively common. Natural size. Pueblo quadrangle, Colorado.n.d. Published as figure 22 in U, S. Geological Survey. Folio 36. 1897. #1:/Gilbert1908-Gilbert G.K. Collection/ggk03518 ID. Gilbert, G.K. 3518 4 x 5 and 11 x 14 Composite photograph of photographs numbered 3272 thru 3274. View southward in Darwin Canyon showing Mount Darwin and east end of Darwin Glacier, Sierra Nevada. Sequoia and Kings Canyon National Park. Mount Goddard quadrangle, Fresno County, California. August 14, 1908. #1:/Gilbert1899-Gilbert G.K. Collection/ggk0448a ID. Gilbert, G.K. 448a Unalaska Bay, Unalaska Island. The nearer settlement is Dutch Harbor; the more distant, Iliuliuk. Aleutian Islands, Aleutian region, Alaska. 1899. #1:/Gilbert, G.K. Collection/ggk0972a ID. Gilbert, G.K. 972a New York. Coarse alluvium deposited during the torrential scouring of The Gulf at Lockport. Circa 1895. Photos ggk00972 and ggk0972a form a panorama. #1:/New York/ggk0991a ID. Gilbert, G.K. 991a New York. Estuary of Eighteenmile Creek. Circa 1895. Photos ggk00991 and ggk0991a form a panorama. #1:/Gilbert, G.K. Collection/ggk1006a ID. Gilbert, G.K. 1006a New York. Stream terraces near Wilson. Circa 1889. Photos ggk01006 and ggk1006a form a panorama. #1:/New York/ggk1013a ID. Gilbert, G.K. 1013a New York. Northward in the Niagara Gorge, the end of the gorge appearing in the distance. Circa 1889. #1:/New York/ggk1016a ID. Gilbert, G.K. 1016a New York. Giant ripples in Medina Sandstone at Lewiston. Circa 1889. #1:/New York/ggk1024a ID. Gilbert, G.K. 1024a New York. Nodular structure in Medina Shale in the Niagara Gorge. Circa 1889. #1:/New York/ggk1025a ID. Gilbert, G.K. 1025a New York. Unconformity by erosion in the Medina Formation in the Niagara Gorge. Circa 1889. #1:/Lake Ontario/ggk1028a ID. Gilbert, G.K. 1028a Lake Ontario. Boulder pavement on the lakeshore near Wilson, New York. Circa 1889. #1:/New York/ggk1747a ID. Gilbert, G.K. 1747a New York. Back-set beds of Iroquois beach at Lewiston. Circa 1889. #1:/New York/ggk1772a ID. Gilbert, G.K. 1772a New York. Giant ripples in Medina Sandstone at Lockport. Circa 1889. #1:/New York/ggk1773a ID. Gilbert, G.K. 1773a New York. Remnant of a giant ripple in Medina Sandstone near the track of the New York Central Railroad in the Niagara Gorge. Circa 1889. #1:/Lake Ontario/ggk1779a ID. Gilbert, G.K. 1779a Lake Ontario. Lakeshore near Wilson, New York, viewed from the end of a pier. Shore drift transported by the waves, from right to left, accumulates against the pier. On the opposite (east) side of the pier the defect of shore drift exposes the till to comparatively rapid erosion. 1898. Photos ggk01799 and ggk1779a form a panorama. #1:/Gilbert G.K. Collection/ggk1788a ID. Gilbert, G.K. 1788a Panorama with photo no. 1788. #1:/Gilbert1901-Gilbert G.K. Collection/ggk1793a ID. Gilbert, G.K. 1793a Similar to photo no. 1793. #1:/Gilbert1901-Gilbert G.K. Collection/ggk1795a ID. Gilbert, G.K. 1795a West front of Wasatch Range, Utah, looking northward from near mouth of Kill Creek Canyon. Salt Lake County. 1901. (Panorama with photo no. 1795). #1:/Gilbert G.K. Collection/ggk1807a ID. Gilbert, G.K. 1807a West front of Wasatch Range, Utah, north of Little Cottonwood Creek. Salt Lake County. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk1823a ID. Gilbert, G.K. 1823a Face of the Wasatch Range north of Little Cottonwood Canyon, showing triangular facets associated with the frontal fault. Salt Lake County, Utah. 1901. (Panorama with photo nos. 1823, 1823b-1823d). #1:/Gilbert1901-Gilbert G.K. Collection/ggk1823b ID. Gilbert, G.K. 1823b Face of Wasatch Range just north of Little Cottonwood Canyon. The white granite bowlders along the lower part of the mountain face were dropped by a glacier from Little Cottonwood Canyon. At the right is part of the double fault scarp shown in no. 1814. Salt Lake County, Utah. 1901. (Panorama with photo nos. 1823-1823a, 1823c-1823d). #1:/Gilbert1901-Gilbert G.K. Collection/ggk1823c ID. Gilbert, G.K. 1823c Mouth of Little Cottonwood Canyon, showing, at right, heads of the south moraine of Little Cottonwood Canyon, and the moraines of Dry Cottonwood Canyon. Salt Lake County, Utah, 1901. (Panorama with photo nos. 1823-1823b, 1823d). #1:/Gilbert1901-Gilbert G.K. Collection/ggk1823d ID. Gilbert, G.K. 1823d Front of range south of Little Cottonwood Canyon. At left are moraines of Little Cottonwood and Dry Cottonwood Canyons; at right triangular facets connected with the great marginal fault. Salt Lake County, Utah. 1901. (Panorama with photo nos. 1823-1823c). #1:/Gilbert1901-Gilbert G.K. Collection/ggk1850a ID. Gilbert, G.K. 1850a Low shoulder of spur on west flank of Stansbury Range, Utah, near Indian settlement. This spur is composed of bed rock, and was uplifted after being thoroughly graded. Tooele County. 1901. (Panorama with photo no. 1850). #1:/Gilbert1901-Gilbert G.K. Collection/ggk1854a ID. Gilbert, G.K. 1854a Greasewood, Skull Valley. Tooele County, Utah. 1901. #1:/Gilbert1901-Gilbert G.K. Collection/ggk1857a ID. Gilbert, G.K. 1857a North face of Red Pine Mountain, Utah. 1901. (Panorama with photo no. 1857). #1:/Gilbert1901-Gilbert G.K. Collection/ggk1879a ID. Gilbert, G.K. 1879a Shear zone, Sandwich Hills, west of Dugway Range, Utah. Juab County. 1901. (Same as photo no. 1879). #1:/Gilbert1901-Gilbert G.K. Collection/ggk1880a ID. Gilbert, G.K. 1880a West front of Fish Spring Range, Utah, north of Fish Springs mines; Upper Paleozoic limestones. Juab County. 1901. (Similar to photo no. 1880). #1:/Gilbert1901-Gilbert G.K. Collection/ggk1902a ID. Gilbert, G.K. 1902a Details of sculpture of middle Lavender Butte, Utah. Juab County. 1901. (Similar to 1903). #1:/Gilbert1901-Gilbert G.K. Collection/ggk1907a ID. Gilbert, G.K. 1907a Lavender Buttes, Utah, from the south, Juab County. 1901. (Panorama with photo no. 1907). #1:/Gilbert1901-Gilbert G.K. Collection/ggk1916a ID. Gilbert, G.K. 1916a Main front and spur of Fish Spring Range, Utah, southwest from Cane Spring, Juab County. 1901. (Panorama with photo no. 1916). #1:/Gilbert1901-Gilbert G.K. Collection/ggk1919a ID. Gilbert, G.K. 1919a A group of embankments made by waves of Lake Bonneville at the south end of Fish Spring Valley, Utah. Juab County. 1901. (Panorama with photo no. 1919). #1:/Gilbert1901-Gilbert G.K. Collection/ggk1926a ID. Gilbert, G.K. 1926a Fault or landslide cliff near North Spring, House Range, Utah. Millard County. 1901. (Panorama with photo no. 1926). #1:/Gilbert1901-Gilbert G.K. Collection/ggk1930a ID. Gilbert, G.K. 1930a West face of House Range, Utah, looking southward from a foothill south of Dome Canyon. The high cliffs are of Cambrian limestone; the nearer hills of Cambrian sandstone. Millard County. 1901. (Same as photo no. 1930). #1:/Gilbert1901-Gilbert G.K. Collection/ggk1934a ID. Gilbert, G.K. 1934a West face of House Range, Utah, between Done and Marjum Canyons. The upper cliffs are of Cambrian limestone, the lower slopes chiefly of underlying Cambrian sandstone, but Cambrian limestones of a lower-lying orographic block form foothills with low cliffs. Millard County. 1901. (Panorama with photo no. 1934) #1:/Gilbert1901-Gilbert G.K. Collection/ggk1935a ID. Gilbert, G.K. 1935a The high cliffs are of Cambrian limestone, the lower slopes chiefly of underlying Cambrian sandstone, but a few foothills show Cambrian limestones belonging to downthrow blocks. Millard County, Utah. 1901. (Panorama with photo nos. 1935, 1935b). #1:/Gilbert1901-Gilbert G.K. Collection/ggk1935b ID. Gilbert, G.K. 1935b West front of House Range, Utah, south of Antelope Pass. Shows Antelope Pass at the left. Millard County. 1901. (Panorama with photo nos. 1935, 1935a). #1:/Gilbert1901-Gilbert G.K. Collection/ggk1945a ID. Gilbert, G.K. 1945a Rainbow Valley and Marjum Canyon, Utah. In the distance White Valley and the Confusion Range. Rainbow Valley follows the outcrop of Cambrian shales, and crosses the House Range obliquely from northeast to southwest. It's more distant part drains directly to White Valley; the drainage of the nearer portions crosses the ridge of underlying limestones, leaving the valley in two canyons, which soon join. Millard County. 1901. (Panorama with photo nos. a1945, 1945b). #1:/Gilbert1901-Gilbert G.K. Collection/ggk1945b ID. Gilbert, G.K. 1945b Rainbow Valley and Marjum Canyon, Utah. In the distance White Valley and the Confusion Range. Rainbow Valley follows the outcrop of Cambrian shales, and crosses the House Range obliquely from northeast to southwest. It's more distant part drains directly to White Valley; the drainage of the nearer portions crosses the ridge of underlying limestones, leaving the valley in two canyons, which soon join. Millard County. 1901. (Panorama with photo nos. 1945, 1945a). #1:/Gilbert1901-Gilbert G.K. Collection/ggk1947a ID. Gilbert, G.K. 1947a Rainbow Valley, House Range, Utah. The view looks northeastward up the valley, with the main mass of the range at the left. Millard County. 1901. (Panorama with photo no. 1947). #1:/Gilbert1901-Gilbert G.K. Collection/ggk1948a ID. Gilbert, G.K. 1948a House Range; Marjum Canyon from the east. Foreground is part of Rainbow Valley, a monoclinal valley occupying the outcrop of the Rainbow shales. A considerable portion of its drainage here descends against the dip, through the underlying limestones, to White Valley. Millard County, Utah. 1901. #1:/New York/ggk1968a ID. Gilbert, G.K. 1968a New York. Canyon of the Genesee River below the lower falls near Rochester. There is now a bridge at this point. The white band and all below it belong to the Medina Formation. The strata above it are of the Clinton group. Circa 1895. #1:/Gilbert1903-Gilbert G.K. Collection/ggk1975a ID. Gilbert, G.K. 1975a Foothills of the Sierra Nevada, near Kaweah River. The trees are oak. Tulare County, California. 1903. #1:/Yosemite National Park/ggk2050a ID. Gilbert, G.K. 2050a Yosemite National Park, California. Glacier polish on a floor of massive granite near Cathedral Lake. The surface of the rock is scaling off in places as a result of weathering, but much of the polish is still in place and is likely to endure for a long time. 1903. Plate 35-B, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/ggk2051a ID. Gilbert, G.K. 2051a Yosemite National Park, California. Erratic boulders resting on a glaciated surface near Tioga Road west of Tenaya Lake. 1903. #1:/Yosemite National Park/ggk2073a ID. Gilbert, G.K. 2073a Yosemite National Park, California. Cathedral Lake, viewed from the east. This is a typical rock-basin lake, the bed rock being visible all about its shores. 1903. #1:/Gilbertnd-Gilbert G.K. Collection/ggk3417a ID. Gilbert, G.K. 3417a West front of Wasatch Range near Willard. The conspicuous pale band is the outcrop of the quartzite (Hague), which here dips east and strikes south-southeast. Above it are less resistant beds, largely limestones; below are crystalline schists, also less resistant. The views illustrate the fact that the great fault separating the range from the valley trends independently of the strike. Box Elder County, Utah.n.d. (Panorama with photo nos. 3417b, 3417c) Published as plate 22-A in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbertnd-Gilbert G.K. Collection/ggk3417b ID. Gilbert, G.K. 3417b West front of Wasatch Range near Willard. The conspicuous pale band is the outcrop of the quartzite (Hague), which here dips east and strikes south-southeast. Above it are less resistant beds, largely limestones; below are crystalline schists, also less resistant. The views illustrate the fact that the great fault separating the range from the valley trends independently of the strike. Box Elder County, Utah.n.d. (Panorama with photo nos. 3417a, 3417c) Published as plate 22-A in U.S. Geological Survey. Professional paper 153. 1928. #1:/Gilbertnd-Gilbert G.K. Collection/ggk3417c ID. Gilbert, G.K. 3417c West front of Wasatch Range near Willard. The conspicuous pale band is the outcrop of the quartzite (Hague), which here dips east and strikes south-southeast. Above it are less resistant beds, largely limestones; below are crystalline schists, also less resistant. The views illustrate the fact that the great fault separating the range from the valley trends independently of the strike. Box Elder County, Utah.n.d. (Panorama with photo nos. 3417a, 3417b) Published as plate 22-A in U.S. Geological Survey. Professional paper 153. 1928. #1:/Point Reyes National Seashore/ggkb2855 ID. Gilbert, G.K. 2855bw Point Reyes National Seashore, California. Cracks divergent from the main fault near Skinner Ranch, 1 mile west of Olema. 1906. Photo taken after the San Francisco earthquake of April 18, 1906. #1:/Point Reyes National Seashore/ggkb2857 ID. Gilbert, G.K. 2857bw Point Reyes National Seashore, California. Road crack on the west shore of Tomales Bay, south of Inverness Ridge. 1906. Photo taken after the San Francisco earthquake of April 18, 1906. #1:/Point Reyes National Seashore/ggkb2861 ID. Gilbert, G.K. 2861bw Point Reyes National Seashore, California. Ridges and tidal flat near the head of Tomales Bay at low tide, looking east. Before the San Francisco earthquake of April 18, 1906, the surface is said to have been smooth. April 28, 1906. Plate 8-A, U.S. Geological Survey Bulletin 324. #1:/Point Reyes National Seashore/ggkb2863 ID. Gilbert, G.K. 2863bw Point Reyes National Seashore, California. Tidal flat on the west side of Tomales Bay, looking north. This part of the flat was ridged by the San Francisco earthquake of April 18, 1906, but has been partially smoothed by the water at high tide. The mud was also heaped up against the firmer ground of the shore on the left. 1906. Plate 7-A, U.S. Geological Survey Bulletin 324. Compare with photo ggkb2864. #1:/Point Reyes National Seashore/ggkb2864 ID. Gilbert, G.K. 2864bw Point Reyes National Seashore, California. Portion of the tidal flat on Tomales Bay, looking northeast. 1906. Plate 7-B, U.S. Geological Survey Bulletin 324. Compare with photo ggkb2863. #1:/Point Reyes National Seashore/ggkb2868 ID. Gilbert, G.K. 2868bw Point Reyes National Seashore, California. Landslide 2 miles west of Inverness Ridge and 1 mile south of Sunshine Ranch. A hillside bog was set in motion by the shock of the San Francisco earthquake of April 18, 1906, and flowed down the slope as a stream of mud. 1906. #1:/Point Reyes National Seashore/ggkb2924 ID. Gilbert, G.K. 2924bw Point Reyes National Seashore, California. Earthquake fault trace between Shafter and Skinner Ranches near Olema, looking northwest. There has been a relative displacement of the ground at right and left of the trace amounting to about 15 feet due to the San Francisco earthquake of April 18, 1906. The ground on the left moved from the observer, and the ground on the right moved toward the observer. 1906. #1:/Gregory H.E. Collection/ghe00001 ID. Gregory, H.E. 1 "Haystack"' Three + or - miles east of St. Michaels, Apache County, Arizona, Fort Defiance quadrangle. Sandstone of the La Plata group. May 1909. #1:/Gregory H.E. Collection/ghe00002 ID. Gregory, H.E. 2 Black Creek Valley near Fort Defiance, Apache County, Arizona. Port Defiance quadrangle. Foreground Chinle formation (Triassic); background strata of La Plata group, McElmo formation and Cretaceous. May, 1909. #1:/Gregory H.E. Collection/ghe00003 ID. Gregory, H.E. 3 Bonito Canyon, looking west, near Fort Defiance, Apache County, Arizona. Fort Defiance quadrangle. Walls of de Chelly (Permian ?) sandstone. May, 1909. #1:/Gregory H.E. Collection/ghe00004 ID. Gregory, H.E. 4 Black Creek Talley near Fort Defiance, Apache County, Arizona. Port Defiance quadrangle. Foreground Chinle formation (Triassic); background strata of La Plata group, McElmo formation and Cretaceous. May, 1909. #1:/Gregory H.E. Collection/ghe00005 ID. Gregory, H.E. 5 General view Moenkopi (Permian ?) strata, Bonito Valley, Apache County, Arizona, Port Defiance quadrangle. May, 1909. #1:/Gregory H.E. Collection/ghe00006 ID. Gregory, H.E. 6 Lacustrine deposits, Bonito Valley, Apache County, Arizona, Port Defiance quadrangle. May, 1909. #1:/Gregory H.E. Collection/ghe00007 ID. Gregory, H.E. 7 Kit Carson Monument. Bonito Valley, Apache County, Arizona, de Chelly sandstone, Port Defiance quadrangle. May, 1909. #1:/Gregory H.E. Collection/ghe00008 ID. Gregory, H.E. 8 Slack Creek Valley near Fort Defiance, Apache County, Arizona. Port Defiance quadrangle. Foreground Chinle formation (Triassic); background strata of La Plata group, McElmo formation and Cretaceous. May, 1909. #1:/Gregory H.E. Collection/ghe00009 ID. Gregory, H.E. 9 Black Rock - Black Creek Valley, near Port Defiance, Apache County, Arizona, Fort Defiance quadrangle. Volcanic neck or dike of orthoclase basalt, May, 1909. #1:/Gregory H.E. Collection/ghe00010 ID. Gregory, H.E. 10 Detail of Black Rock, Black Creek Valley, near Fort Defiance, Apache County, Arizona, Fort Defiance quadrangle. Agglomerate of igneous and sedimentary materials, May, 1909. #1:/Gregory H.E. Collection/ghe00011 ID. Gregory, H.E. 11 Defiance Monocline looking north at Hunter Point. Black Creek Valley, Apache County, Arizona, Port Defiance quadrangle. Moenkopi formation, de Chelly sandstone and Shinarump conglomerate. May, 1909. #1:/Gregory H.E. Collection/ghe00012 ID. Gregory, H.E. 12 Defiance Monocline, looking northeast at Oak Springs, Black Creek. Valley, Apache County, Arizona, Port Defiance quadrangle. de Chelly sandstone and Shinarump conglomerate. May, 1909. #1:/Gregory H.E. Collection/ghe00013 ID. Gregory, H.E. 13 Columns of minette agglomerate, Fluted Rock, Apache County, Arizona, Port Defiance quadrangle. May, 1909. #1:/Gregory H.E. Collection/ghe00014 ID. Gregory, H.E. 14 Buell Park, Apache County, Arizona, Port Defiance quadrangle. Curved dike of shonkonite in center. This is the chief source of the Navajo peridots. June, 1909. #1:/Gregory H.E. Collection/ghe00015 ID. Gregory, H.E. 15 General view Buell Park, Apache County, Arizona, Port Defiance quadrangle. Vegetation sage and yellow pine typical for elevation of 7,000 feet. Zilditloi fountain ligneous) in background. June, 1909. #1:/Gregory H.E. Collection/ghe00016 ID. Gregory, H.E. 16 Outlet of Buell Park, looking down stream, Apache County, Arizona, Fort Defiance quadrangle,proposed dam site. June, 1909. #1:/Gregory H.E. Collection/ghe00017 ID. Gregory, H.E. 17 Buttes of Chinle formation, division C. Beautiful Valley, Apache County, Arizona, Port Defiance quadrangle. June, 1909. #1:/Gregory H.E. Collection/ghe00018 ID. Gregory, H.E. 18 Detail Chinle formation, division C. Beautiful Valley, Apache County, Arizona, Fort Defiance quadrangle. The bowlders are petrified wood. June, 1909. #1:/Gregory H.E. Collection/ghe00019 ID. Gregory, H.E. 19 Forest of yellow pine, elevation 7,400 feet, between Port Defiance and Ganado, Apache County, Arizona. Port Defiance quadrangle. June, 1909. #1:/Gregory H.E. Collection/ghe00020 ID. Gregory, H.E. 20 Sage, cedar and pinon, typical vegetation, elevation 6,400 feet. Sebito wash, Apache County, Arizona. Port Defiance quadrangle. June, 1909. #1:/Gregory H.E. Collection/ghe00021 ID. Gregory, H.E. 21 South end of Ganado Mesa, near Ganado, Apache County, Fort Defiance quadrangle. Chinle formation, Triassic, overlain by Tertiary. June, 1909. #1:/Gregory H.E. Collection/ghe00022 ID. Gregory, H.E. 22 Pueblo Colorado Wash, Ganado, Apache County, Arizona, Fort Defiance quadrangle. Buttes of Chinle formation. June, 1909. #1:/Gregory H.E. Collection/ghe00023 ID. Gregory, H.E. 23 Indian trading post. Cornfields, Apache County, Arizona, Fort Defiance quadrangle. June, 1909. #1:/Gregory H.E. Collection/ghe00024 ID. Gregory, H.E. 24 Landslides 5+/- miles southwest Sunrise Springs, Apache County, Arizona, Fort Defiance quadrangle, Tertiary sediments. June, 1909. #1:/Gregory H.E. Collection/ghe00025 ID. Gregory, H.E. 25 Interbedded ash, tuff, and Tertiary clays 12+/- miles southwest Sunrise Springs, Apache County, Arizona. Port Defiance quadrangle. June, 1909. #1:/Gregory H.E. Collection/ghe00026 ID. Gregory, H.E. 26 Volcanic Neck composed of limburgite 15+ miles southwest of Sunrise Springs, Apache County, Arizona, Port Defiance quadrangle. June, 1909. #1:/Gregory H.E. Collection/ghe00027 ID. Gregory, H.E. 27 Edge of Mesa, 4+/- miles northeast of Bidahochi, Navajo County, Arizona. Tusayan quadrangle. Tertiary tuff Jurassic sandstone. June, 1909. County, Arizona. Tusayan quadrangle. resting on Jurassic sandstone. #1:/Gregory H.E. Collection/ghe00028 ID. Gregory, H.E. 28 Detail, Jurassic sandstone, Bidahochi, Navajo County, Arizona. Tusayan quadrangle. June, 1909. #1:/Gregory H.E. Collection/ghe00029 ID. Gregory, H.E. 29 Tertiary shales and tuff, 2+/- miles south of Bidahochi, Navajo County, Arizona. Tusayan quadrangle. June, 1909. #1:/Gregory H.E. Collection/ghe00030 ID. Gregory, H.E. 30 Lucasakad Spring, west of Indian Wells, Navajo County, Arizona. Tusayan quadrangle. Water issues from contact of tuff and sandstone, June, 1909. #1:/Gregory H.E. Collection/ghe00031 ID. Gregory, H.E. 31 Typical vegetation, pinon and cedar, elevation 5,600 feet. Hopi Buttes region, Navajo County, Arizona. Tusayan quadrangle. June, 1909. #1:/Gregory H.E. Collection/ghe00032 ID. Gregory, H.E. 32 Twin Buttes, Navajo County, Arizona. Tusayan quadrangle. Volcanic necks, with dikes of limburgite. June, 1909. #1:/Gregory H.E. Collection/ghe00033 ID. Gregory, H.E. 33 Mesa of tuff and dike of limburgite, one mile east of Twin Buttes, Navajo County, Arizona. Tusayan quadrangle. June, 1909. #1:/Gregory H.E. Collection/ghe00034 ID. Gregory, H.E. 34 Lava capped mesa with dike cutting Chinle formation 8+/- miles south 1+/- mile west of Indian Wells, Navajo County, Arizona, Tusayan quadrangle. June, 1909. #1:/Gregory H.E. Collection/ghe00035 ID. Gregory, H.E. 35 Lava capped mesa of Chinle formation 6 miles south, Indian Wells, Navajo County, Arizona, Tusayan quadrangle. June, 1909. #1:/Gregory H.E. Collection/ghe00036 ID. Gregory, H.E. 36 Lava capped mesas on Holtrook-Keams Canyon Road, Navajo County, Arizona, Tusayan quadrangle. June, 1909. #1:/Gregory H.E. Collection/ghe00037 ID. Gregory, H.E. 37 Group of volcanic necks, Hopi Buttes province near Chandler ranch, Navajo County, Arizona. Tusayan quadrangle. June, 1909. #1:/Gregory H.E. Collection/ghe00038 ID. Gregory, H.E. 38 Montezuma's chair, Navajo County, Arizona, Tusayan quadrangle. Volcanic neck viewed from distance of 6 Miles. June, 1909. #1:/Gregory H.E. Collection/ghe00039 ID. Gregory, H.E. 39 Montezuma's chair, volcanic neck, Navajo County, Arizona, Tusayan quadrangle. June, 1909. #1:/Gregory H.E. Collection/ghe00040 ID. Gregory, H.E. 40 Oraibi Wash at Burro Springs, Navajo County, Arizona, quadrangle. June, 1909. #1:/Gregory H.E. Collection/ghe00041 ID. Gregory, H.E. 41 Typical arroyo, Oraibi Wash, Navajo County, Arizona, Tusayan quadrangle. Hand drilling apparatus at work. June, 1909. #1:/Gregory H.E. Collection/ghe00042 ID. Gregory, H.E. 42 Alluvium wall of Oraibi "ash, Navajo County, Arizona, Tusayan quadrangle, June, 1909. #1:/Gregory H.E. Collection/ghe00043 ID. Gregory, H.E. 43 Masses of alluvium, Oraibi Wash, Navajo County, Arizona. Tusayan quadrangle. Masses are 3 to 9 feet in diameter and have been carried 1 1/2 miles beyond mouth of Arroyo. June, 1909. #1:/Gregory H.E. Collection/ghe00044 ID. Gregory, H.E. 44 Tolani lakes, lower Oraibi Wash, Navajo County, Arizona. Tusayan quadrangle. June, 1909. #1:/Gregory H.E. Collection/ghe00045 ID. Gregory, H.E. 45 Typical vegetation, Tusayan Washes province, elevation 4,600 foot. Near Tolani lakes, Navajo County, Arizona. Tusayan quadrangle. June, 1909. #1:/Gregory H.E. Collection/ghe00046 ID. Gregory, H.E. 46 View in Painted Desert, Newberry Mesa, Coconino County, Arizona. San Francisco fountain quadrangle. Chinle formation. June, 1909. #1:/Gregory H.E. Collection/ghe00047 ID. Gregory, H.E. 47 Sand dune, Kaibito Plateau, Coconino County, Arizona. Echo Cliffs quadrangle. August, 1909. #1:/Gregory H.E. Collection/ghe00048 ID. Gregory, H.E. 48 Sand dunes, Reservoir Canyon, near Tuba, Coconino County, Arizona. Echo Cliffs quadrangle. August, 1909. #1:/Gregory H.E. Collection/ghe00049 ID. Gregory, H.E. 49 Irrigation ditch constructed by Mormon pioneers, Moenkopi Canyon, Coconino County, Arizona. Echo Cliffs quadrangle, August, 1909. #1:/Gregory H.E. Collection/ghe00050 ID. Gregory, H.E. 50 View near Sonsala Buttes, elevation 7,600 feet, Apache County, Arizona. Canyon de Chelly quadrangle. July, 1909. #1:/Gregory H.E. Collection/ghe00051 ID. Gregory, H.E. 51 Concretions, Dakota sandstone, near Lohali, Apache County, Arizona, Canyon de Chelly quadrangle. July, 1909. #1:/Gregory H.E. Collection/ghe00052 ID. Gregory, H.E. 52 Theatre Hock, near Lohali, Apache County Arizona, Canyon de Chelly quadrangle. Composed of McElmo sandstone. July, 1909. #1:/Gregory H.E. Collection/ghe00053 ID. Gregory, H.E. 53 Slim Rock, Navajo County, Arizona, Marsh Pass quadrangle. Tipper Chinle and Wingate sandstone. July, 1909. #1:/Gregory H.E. Collection/ghe00054 ID. Gregory, H.E. 54 Columns of igneous rock head of Tisnasbas Canyon, Garrizo Mountain, Apache County, Arizona Canyon, de Chelly quadrangle. July, 1909. #1:/Gregory H.E. Collection/ghe00055 ID. Gregory, H.E. 55 Naples anticline, Mexican Hat, San Juan River, Can Juan County, Utah, Abajo quadrangle. Goodridge and Moenkopi formations. July, 1909. #1:/Gregory H.E. Collection/ghe00056 ID. Gregory, H.E. 56 Distant view Alhambra Hock. San Juan County, Utah, Abajo quadrangle. Alhambra is a neck or dike of augite minette; strata in foreground is Moenkopi. July, 1909. #1:/Gregory H.E. Collection/ghe00057 ID. Gregory, H.E. 57 Wild horses, Painted Desert, Coconino County, Arizona. Echo Cliffs quadrangle, July, 1909. #1:/Gregory H.E. Collection/ghe00058 ID. Gregory, H.E. 58 Indian Trading post, Indian Wells, Navajo County, Arizona. Tusayan quadrangle. June, 1909. #1:/Gregory H.E. Collection/ghe00059 ID. Gregory, H.E. 59 Navajo hogan, summer and winter dwelling, Moa Ave, Coconino County, Arizona. Echo Cliffs quadrangle. August, 1909. #1:/Gregory H.E. Collection/ghe00060 ID. Gregory, H.E. 60 Mud cracks, McElmo Canyon, San Juan County, Utah. Abajo quadrangle. July, 1910. #1:/Gregory H.E. Collection/ghe00061 ID. Gregory, H.E. 61 Detail mud cracks, San Juan River, near Aneth, San Juan County, Utah. Abajo quadrangle. Cracks are 1 to 3 inches wide. July, 1910. #1:/Gregory H.E. Collection/ghe00062 ID. Gregory, H.E. 62 McElmo formation near Aneth, San Juan County, Utah, Abajo quadrangle. July, 1910. #1:/Gregory H.E. Collection/ghe00063 ID. Gregory, H.E. 63 Quartz seams in La Plate sandstone, between Aneth and Bluff, San Juan County, Utah. Abajo quadrangle. July, 1910. #1:/Gregory H.E. Collection/ghe00064 ID. Gregory, H.E. 64 The Twins Bluff, San Juan County, Utah. Abajo quadrangle. La Plata and McElmo? strata. July, 1910. #1:/Gregory H.E. Collection/ghe00065 ID. Gregory, H.E. 65 Monument Pass, Monument Valley, San Juan County, Utah, Henry Mountain quadrangle. July, 1910. Ranch house, Oljeto, San Juan County, Utah, Henry Mountain quadrangle. de Chelly sandstone, capped by Shinarump conglomerate. July, 1910. #1:/Gregory H.E. Collection/ghe00066 ID. Gregory, H.E. 66 One of the Monuments, Monument Valley, San Juan County, Utah. Henry Mountain quadrangle. The tower is de Chelly sandstone, the pedestal Moenkopi formation. July, 1910. #1:/Gregory H.E. Collection/ghe00067 ID. Gregory, H.E. 67 Ranch house, Oljeto, San Juan County, Utah, Henry Mountain quadrangle. July, 1910. Ranch house, Oljeto, San Juan County, Utah, Henry Mountain quadrangle. de Chelly sandstone, capped by Shinarump conglomerate. July, 1910. #1:/Gregory H.E. Collection/ghe00068 ID. Gregory, H.E. 68 Agathla, volcanic neck. Monument Valley, Navajo County, Arizona. Harsh Pass quadrangle. July, 1910. #1:/Gregory H.E. Collection/ghe00069 ID. Gregory, H.E. 69 Agathla, volcanic neck, Monument Valley, Navajo County, Arizona. Marsh Pass quadrangle, July, 1910. #1:/Gregory H.E. Collection/ghe00070 ID. Gregory, H.E. 70 Middle part of Porras dike. Monument Valley, Navajo County, Arizona, Marsh Pass quadrangle. July, 1910. #1:/Gregory H.E. Collection/ghe00071 ID. Gregory, H.E. 71 de Chelly sandstone near Agathla, Monument Valley, Navajo County, Arizona, Marsh Pass quadrangle. July, 1910. #1:/Gregory H.E. Collection/ghe00072 ID. Gregory, H.E. 72 General view, Monument Valley, Navajo County, Arizona, Marsh Pass quadrangle. Foreground de Chelly sandstone, Background Moenkopi formation and de Chelly sandstone. July, 1910. #1:/Gregory H.E. Collection/ghe00073 ID. Gregory, H.E. 73 Navajo cornfield, Tyende Valley, Navajo County, Arizona, Marsh Pass quadrangle. July, 1910. #1:/Gregory H.E. Collection/ghe00074 ID. Gregory, H.E. 74 Navajo sheep near Agathla, Navajo County, Harsh Pass quadrangle. July, 1910. #1:/Gregory H.E. Collection/ghe00075 ID. Gregory, H.E. 75 Remnant, La Plata sandstone, branch of Laguna Canyon, Navajo County, Arizona, Marsh Pass quadrangle. July, 1910. #1:/Gregory H.E. Collection/ghe00076 ID. Gregory, H.E. 76 Keet Seel cliff village, Segi Mesas, Navajo County Harsh Pass quadrangle, July, 1910. #1:/Gregory H.E. Collection/ghe00077 ID. Gregory, H.E. 77 Entrance to Segihatsosi Canyon, Navajo County, Arizona, Marsh Pass quadrangle, La Plata sandstone resting on Chinle formation. July, 1910. #1:/Gregory H.E. Collection/ghe00078 ID. Gregory, H.E. 78 Owl natural bridge, Nasja Canyon, north base of Navajo Mountain, San Juan County, Utah. La Plata sandstone, Henry Mountain quadrangle. July, 1910. #1:/Gregory H.E. Collection/ghe00079 ID. Gregory, H.E. 79 San Juan Canyon near its mouth, San Juan County, Utah. La Plata sandstone, Henry Mountain quadrangle. July 1910. #1:/Rainbow Bridge National Monument/ghe00080 ID. Gregory, H.E. 80 Rainbow Bridge National Monument, Utah. Rainbow Bridge, viewed from 2 miles distance. July 1910. #1:/Rainbow Bridge National Monument/ghe00081 ID. Gregory, H.E. 81 Rainbow Bridge National Monument, Utah. Rainbow Bridge, spanning Bridge Canyon. July 1910. Plate 31-B, U.S. Geological Survey Professional Paper 93. #1:/Gregory H.E. Collection/ghe00082 ID. Gregory, H.E. 82 Rainbow bridge, viewed from the north. San Juan County, Utah, Henry Mountain quadrangle. La Plata sandstone. July, 1910. #1:/Gregory H.E. Collection/ghe00083 ID. Gregory, H.E. 83 Rainbow "bridge, east limb. San Juan County, Utah, Henry Mountain quadrangle. La Plata sandstone. July, 1910. #1:/Rainbow Bridge National Monument/ghe00084 ID. Gregory, H.E. 84 Rainbow Bridge National Monument, Utah. Looking up at the one of the abutments of Rainbow Bridge to show the structure of the sandstone. July 1910. #1:/Gregory H.E. Collection/ghe00085 ID. Gregory, H.E. 85 Joints in La Plata sandstone, head of Piute Canyon, Navajo County, Arizona. Marsh Pass quadrangle. July, 1910. #1:/Gregory H.E. Collection/ghe00086 ID. Gregory, H.E. 86 Dinosaur tracks, Navajo Canyon, Coconino County, Arizona, Marsh Pass quadrangle, formation. July, 1910. #1:/Gregory H.E. Collection/ghe00087 ID. Gregory, H.E. 87 Dinosaur tracks, Navajo Canyon, Coconino County, Arizona, Marsh Pass quadrangle, formation. July, 1910. #1:/Gregory H.E. Collection/ghe00088 ID. Gregory, H.E. 88 Erosion forms in "Painted Desert" beds, Moenkopi Canyon, Coconino County, Arizona, Echo Cliffs quadrangle. July, 1910. #1:/Gregory H.E. Collection/ghe00089 ID. Gregory, H.E. 89 Wind filling Reservoir Canyon, near Tuba, Coconino County, Arizona, Echo Cliffs quadrangle, July, 1910. #1:/Gregory H.E. Collection/ghe00090 ID. Gregory, H.E. 90 Sandstones, McElmo formation, south base of Navajo Church, McKinley County, New Mexico, Wingate quadrangle. The contact of McElmo and Navajo sandstone shown at the base. June 1911. #1:/Gregory H.E. Collection/ghe00091 ID. Gregory, H.E. 91 Typical erosion form in post-Mesaverde strata on Port Defiance-Tohachi roads, McKinley County, New Mexico, Wingate quadrangle, June, 1911. #1:/Gregory H.E. Collection/ghe00092 ID. Gregory, H.E. 92 Washington Pass, Boundary Mountains, San Juan County, New Mexico, Chaco quadrangle, Cliff in the background is lava and tuff. June, 1911. #1:/Gregory H.E. Collection/ghe00093 ID. Gregory, H.E. 93 Top of Chuska Mountain near Washington Pass, San Juan County, New Mexico, Chaco quadrangle. Cliffs are lava and tuff. June, 1911. #1:/Gregory H.E. Collection/ghe00094 ID. Gregory, H.E. 94 Erosion column, La Plata sandstone 4 miles south of Crystal, McKinley County, Arizona, Fort Defiance quadrangle. Size may be judged from man at the base. June, 1911. #1:/Gregory H.E. Collection/ghe00095 ID. Gregory, H.E. 95 North entrance of Todilto Park, McKinley County, New Mexico, Fort Defiance quadrangle. Walls are of La Plata sandstone. June, 1911. #1:/Gregory H.E. Collection/ghe00096 ID. Gregory, H.E. 96 Red Lake, looking south. McKinley County, New Mexico, Port Defiance quadrangle, Butte in Background is the Outlet neck. June, 1911. #1:/Gregory H.E. Collection/ghe00097 ID. Gregory, H.E. 97 Volcanic neck and dike between Jadito Spring and Egloffstein Butte, Navajo County, Tusayan quadrangle. June, 1911. #1:/Gregory H.E. Collection/ghe00098 ID. Gregory, H.E. 98 Volcanic neck, 6 miles northeast of Eggloffstein Butte, Navajo County, Arizona. Tusayan quadrangle. June, 1911. #1:/Gregory H.E. Collection/ghe00099 ID. Gregory, H.E. 99 White cone from a distance of 4 miles, Navajo County, Arizona, Tusayan quadrangle. June, 1911. #1:/Gregory H.E. Collection/ghe00100 ID. Gregory, H.E. 100 White cone, Navajo County, Arizona, Tusayan quadrangle. Tertiary shales interbedded with ash. June, 1911. #1:/Gregory H.E. Collection/ghe00101 ID. Gregory, H.E. 101 Bedded volcanic ash 4 miles north of White Cone, Navajo County, Arizona, Tusayan quadrangle. June, 1911. #1:/Gregory H.E. Collection/ghe00102 ID. Gregory, H.E. 102 Chinle formation, Beautiful Valley, Apache County, Arizona. Port Defiance quadrangle. June, 1911. #1:/Gregory H.E. Collection/ghe00103 ID. Gregory, H.E. 103 Shinarump conglomerate near mouth of Canyon de Chelly, Apache County, Canyon de Chelly quadrangle. June, 1911. #1:/Gregory H.E. Collection/ghe00104 ID. Gregory, H.E. 104 Edna Needle, Carson Mesa, Apache County, Arizona. Canyon de Chelly quadrangle, eroded from La Plata sandstone. June, 1911. #1:/Gregory H.E. Collection/ghe00105 ID. Gregory, H.E. 105 Hope window, Carson Mesa, Apache County, Arizona. Canyon de Chelly quadrangle. Eroded from La Plata sandstone. June, 1911. #1:/Gregory H.E. Collection/ghe00106 ID. Gregory, H.E. 106 Petrified tree, Hound Rock Forest, Apache County, Arizona. Canyon de Chelly quadrangle. June, 1911. #1:/Gregory H.E. Collection/ghe00107 ID. Gregory, H.E. 107 Distant view of Hound Hock and Little Round Rock, Apache County, Arizona. Canyon de Chelly quadrangle La Plata sandstone, resting on Chinle shales. Natural window in left background. June, 1911. #1:/Gregory H.E. Collection/ghe00108 ID. Gregory, H.E. 108 Palisades Creek, San Juan County, New Mexico. Canyon de Chelly quadrangle. June, 1911. #1:/Gregory H.E. Collection/ghe00109 ID. Gregory, H.E. 109 Tubby Butte, Apache County, Arizona. Canyon de Chelly quadrangle. June, 1911. #1:/Gregory H.E. Collection/ghe00110 ID. Gregory, H.E. 110 Mesaverde strata, Crownpoint, McKinley County, New Mexico, Wingate quadrangle. June, 1911. #1:/Gregory H.E. Collection/ghe00111 ID. Gregory, H.E. 111 View in Painted Desert, Moenkopi Wash, Coconino County, Echo Cliffs quadrangle, Chinle formation. June, 1911. #1:/Gregory H.E. Collection/ghe00112 ID. Gregory, H.E. 112 View in Painted Desert, Moenkopi Wash, Coconino County, Echo Cliffs quadrangle, Chinle formation. June, 1911. #1:/Gregory H.E. Collection/ghe00113 ID. Gregory, H.E. 113 Shinarump conglomerate, Apache County, Arizona, Defiance quadrangle. June, 1911. #1:/Gregory H.E. Collection/ghe00114 ID. Gregory, H.E. 114 Shinarump conglomerate, Apache County, Arizona. Port Defiance quadrangle. June, 1911. #1:/Gregory H.E. Collection/ghe00115 ID. Gregory, H.E. 115 de Chelly sandstone, Todokozh Canyon near Gross Canyon, Apache County, Arizona. Port Defiance quadrangle. June, 1911. #1:/Gregory H.E. Collection/ghe00116 ID. Gregory, H.E. 116 Wall of La Plata sandstone near Black Rock, Apache County, Arizona, Fort Defiance quadrangle. June, 1911. #1:/Gregory H.E. Collection/ghe00117 ID. Gregory, H.E. 117 Cliff of La Plata sandstone near Black Rock, Apache County, Arizona, Fort Defiance quadrangle. June, 1911. #1:/Gregory H.E. Collection/ghe00118 ID. Gregory, H.E. 118 Sand dunes, Chinle Valley, Apache County, Arizona, Canyon de Chelly quadrangle. June, 1913. #1:/Gregory H.E. Collection/ghe00119 ID. Gregory, H.E. 119 Sand dunes, Chinle Valley, Apache County, Arizona, Canyon de Chelly quadrangle. June, 1913. #1:/Gregory H.E. Collection/ghe00120 ID. Gregory, H.E. 120 Sand dimes, Chinle Valley, Apache County, Arizona, Canyon de Chelly quadrangle. June, 1913. #1:/Gregory H.E. Collection/ghe00121 ID. Gregory, H.E. 121 Detailed structure in sand dunes, Chinle Valley, Apache County, Arizona, Canyon de Chelly quadrangle. June, 1912. #1:/Gregory H.E. Collection/ghe00122 ID. Gregory, H.E. 122 Chinle formation, Division D, near Chinle School, Apache County, Canyon de Chelly quadrangle. June, 1913. #1:/Gregory H.E. Collection/ghe00123 ID. Gregory, H.E. 123 Typical valley, Hubbell Plateau, elevation 7,200 feet, Apache County, Fort Defiance quadrangle. June, 1913. #1:/Gregory H.E. Collection/ghe00124 ID. Gregory, H.E. 124 Contact, de Chelly sandstone, and Shinarump conglomerate, Bonito Canyon, near Fort Defiance, Apache County, Arizona, Fort Defiance quadrangle. June, 1915. #1:/Gregory H.E. Collection/ghe00125 ID. Gregory, H.E. 125 de Chelly sandstone, Bonito Canyon, near Fort Defiance, Apache County, Port Defiance quadrangle. June, 1913. #1:/Gregory H.E. Collection/ghe00126 ID. Gregory, H.E. 126 Chinle formation, Division C, Chinle Valley, near Hound Hock. June, 1913. #1:/Gregory H.E. Collection/ghe00127 ID. Gregory, H.E. 127 Chinle formation, Division G, Chinle Valley, near Round Hock. June, 1913. #1:/Gregory H.E. Collection/ghe00128 ID. Gregory, H.E. 128 Buttresses and rincons in La Plata sandstone near mouth of Lukachukai Creek, Apache County, Arizona. Canyon de Chelly quadrangle. June, 1913. #1:/Gregory H.E. Collection/ghe00129 ID. Gregory, H.E. 129 Column La Plata sandstone, Chinle Valley, near month of Lukachukai Creek, Apache County, Arizona. Canyon de Chelly quadrangle. June, 1912. #1:/Gregory H.E. Collection/ghe00130 ID. Gregory, H.E. 130 Structure La Plata sandstone near Setsiltso Spring, Chinle Valley, Apache County, Canyon de Chelly quadrangle. June, 1915. #1:/Gregory H.E. Collection/ghe00131 ID. Gregory, H.E. 131 Structure La Plata sandstone near Setsiltso Spring, Chinle Valley, Apache County, Canyon de Chelly quadrangle. June, 1913. #1:/Gregory H.E. Collection/ghe00132 ID. Gregory, H.E. 132 Cavity in La Plata sandstone, Lower Chinle Valley, Apache County, Arizona. Canyon de Chelly quadrangle. June, 1913. #1:/Gregory H.E. Collection/ghe00133 ID. Gregory, H.E. 133 Boulders of granite, Garnet Ridge, Apache County, Arizona. Canyon de Chelly quadrangle. Inclusions in igneous intrusions, how strewn on the surface as erratics. June, 1911. #1:/Gregory H.E. Collection/ghe00134 ID. Gregory, H.E. 134 Boulders of granite, Garnet Ridge, Apache County, Arizona. Canyon de Chelly quadrangle, Inclusions in igneous intrusions now strewn on the surface as erratics. June, 1911. #1:/Gregory H.E. Collection/ghe00135 ID. Gregory, H.E. 135 Comb monocline near Church Rock, Tyende Valley, Navajo County, Arizona, Marsh Pass quadrangle. June, 1913. #1:/Gregory H.E. Collection/ghe00136 ID. Gregory, H.E. 136 Comb monocline near Tyende, Arizona, Navajo County, Marsh Pass quadrangle. La Plata sandstone resting on Chinle formation. June, 1913. #1:/Gregory H.E. Collection/ghe00137 ID. Gregory, H.E. 137 Chinle formation, Division B, 3 miles north of Tyende, Arizona, Navajo County, Marsh Pass quadrangle. The cliff-making bands are limestone conglomerate. June, 1913. #1:/Gregory H.E. Collection/ghe00138 ID. Gregory, H.E. 138 South rim of Monument Valley, Navajo County, Arizona, Marsh Pass quadrangle. Butte on the left is Chaistla volcanic neck. In the distance is the Comb monocline above which rises the volcanic necks of Porras dikes. June, 1913. #1:/Gregory H.E. Collection/ghe00139 ID. Gregory, H.E. 139 Comb monocline near Marsh Pass, Navajo County, Harsh Pass quadrangle. La Plata sandstone caps the mesa and a sloping wall of Chinle formation is exposed below. June, 1913. #1:/Gregory H.E. Collection/ghe00140 ID. Gregory, H.E. 140 Piute Canyon, looking northwest. Navajo County, Arizona, Marsh Pass quadrangle. The walls of the canyon are La Plata sandstone overlying the Chinle formation, Navajo Mountain, seen in the distance. June, 1913. #1:/Gregory H.E. Collection/ghe00141 ID. Gregory, H.E. 141 Detail, Navajo sandstone, Piute Canyon. Navajo County, Arizona, Marsh Pass quadrangle. June, 1913. #1:/Gregory H.E. Collection/ghe00142 ID. Gregory, H.E. 142 North base of Navajo Mountain, showing manner of dissection, San Juan County, Utah, Henry Mountain quadrangle. June, 1913. #1:/Gregory H.E. Collection/ghe00143 ID. Gregory, H.E. 143 View looking north from north flank of Navajo Mountain. San Juan County, Utah, Henry Mountain quadrangle. June, 1913. #1:/Gregory H.E. Collection/ghe00144 ID. Gregory, H.E. 144 Contact, DaKota and McElmo, west side of Navajo Mountain. San Juan County, Utah, Henry Mountain quadrangle. June, 1913. #1:/Gregory H.E. Collection/ghe00145 ID. Gregory, H.E. 145 View on Rainbow Plateau, west base of Navajo Mountain, La Plata sandstone. San Juan County, Utah, Henry Mountain quadrangle. June, 1913. #1:/Gregory H.E. Collection/ghe00146 ID. Gregory, H.E. 146 View on Rainbow Plateau, west base of Navajo Mountain, La Plata sandstone. San Juan County, Utah, Henry Mountain quadrangle. June, 1913. #1:/Gregory H.E. Collection/ghe00147 ID. Gregory, H.E. 147 Rock stream near top of Navajo Mountain. San Juan County, Utah, Henry Mountain quadrangle. Fragments of quartzite metamorphosed from Sandstones of Mancos formation. June, 1913. #1:/Gregory H.E. Collection/ghe00148 ID. Gregory, H.E. 148 Head of canyon extending into Navajo Mountain, from the west, San Juan County, Utah, Henry Mountain quadrangle. June, 1912. #1:/Gregory H.E. Collection/ghe00149 ID. Gregory, H.E. 149 Vegetation top of Navajo Mountain, San Juan County, Utah, Henry fountain quadrangle. June, 1913. #1:/Gregory H.E. Collection/ghe00150 ID. Gregory, H.E. 150 Navajo Mountain, view from south at a distance of 3 miles. San Juan County, Utah, Marsh Pass quadrangle. June, 1912. #1:/Gregory H.E. Collection/ghe00151 ID. Gregory, H.E. 151 Navajo Mountain, view from south, at a distance of 10 miles. Marsh Pass quadrangle. June, 1912. #1:/Gregory H.E. Collection/ghe00152 ID. Gregory, H.E. 152 Todilto formation, wall of Piute Canyon, near upper crossing, Navajo County, Arizona. Marsh Pass quadrangle. June, 1913. #1:/Gregory H.E. Collection/ghe00153 ID. Gregory, H.E. 153 Comb monocline, 3 miles east of Marsh Pass, Navajo County, Arizona. Marsh Pass quadrangle. June, 1913. #1:/Gregory H.E. Collection/ghe00154 ID. Gregory, H.E. 154 McElmo formation near Bitsihuitsos Butte, Apache County, Arizona. Canyon de Chelly quadrangle. June, 1913 #1:/Gregory H.E. Collection/ghe00155 ID. Gregory, H.E. 155 View in Cannon de Chelly, Apache County, Canyon de Chelly quadrangle, Walls are of de Chelly sandstone capped by Shinarump conglomerate. June, 1913. #1:/Canyon de Chelly National Monument/ghe00156 ID. Gregory, H.E. 156 Canyon de Chelly National Monument, Arizona. Detail of structure in De Chelly Sandstone. June 1913. #1:/Canyon de Chelly National Monument/ghe00157 ID. Gregory, H.E. 157 Canyon de Chelly National Monument, Arizona. Buttresses of De Chelly Sandstone capped by Shinarump Conglomerate. June 1913. #1:/Gregory H.E. Collection/ghe00158 ID. Gregory, H.E. 158 View at Red Lake, McKinley County, New Mexico, Fort Defiance quadrangle. The lake bed cut in Chinle formation. The wall is of La Plata group. At the left are the volcanic conglomerates of green knobs. On the right is the volcanic mass of Zilftitloi Mountain. July, 1912. (Panorama with 159, 160). #1:/Gregory H.E. Collection/ghe00159 ID. Gregory, H.E. 159 View at Red Lake, McKinley County, New Mexico, Fort Defiance quadrangle. The lake bed cut in Chinle formation. The wall is of La Plata group. At the left are the volcanic conglomerates of green knobs. On the right is the volcanic mass of Zilftitloi Mountain. July, 1912. (Panorama with 158, 160). #1:/Gregory H.E. Collection/ghe00160 ID. Gregory, H.E. 160 View at Red Lake, McKinley County, New Mexico, Fort Defiance quadrangle. The lake bed cut in Chinle formation. The wall is of La Plata group. At the left are the volcanic conglomerates of green knobs. On the right is the volcanic mass of Zilftitloi Mountain. July, 1912. (Panorama with 158, 159). #1:/Gregory H.E. Collection/ghe00161 ID. Gregory, H.E. 161 View looking south along Defiance monocline from Zilditloi Mountain, McKinley County, New Mexico. Fort Defiance quadrangle. July, 1913. #1:/Gregory H.E. Collection/ghe00162 ID. Gregory, H.E. 162 Gave in La Plata sandstone, Todilto Park, McKinley County, New Mexico, Wingate quadrangle. July, 1913. #1:/Gregory H.E. Collection/ghe00163 ID. Gregory, H.E. 163 Venus Needle, Todilto Park, McKinley County, New Mexico, Port Defiance quadrangle. La Plata sandstone. Size may be judged from horse at the base. July, 1913. #1:/Gregory H.E. Collection/ghe00164 ID. Gregory, H.E. 164 Cliffs and towers of La Plata sandstone, Todilto Park, McKinley County, New Mexico, Port Defiance quadrangle. July, 1913. #1:/Gregory H.E. Collection/ghe00165 ID. Gregory, H.E. 165 Beelzebub, volcanic neck, Todilto Park, McKinley County, New Mexico, Wingate quadrangle. July, 1913. #1:/Gregory H.E. Collection/ghe00166 ID. Gregory, H.E. 166 The Beast, volcanic neck, Black Valley, Bed Lake volcanic field, McKinley County, New Mexico. Port Defiance quadrangle. July, 1913. #1:/Gregory H.E. Collection/ghe00167 ID. Gregory, H.E. 167 Zilditloi Mountain from the west, McKinley County, New Mexico, Fort Defiance quadrangle. July, 1913. #1:/Gregory H.E. Collection/ghe00168 ID. Gregory, H.E. 168 Alluvium wall of Black , entrance to Todilto Park, McKinley County, New Mexico, Fort Defiance quadrangle. July, 1913. #1:/Gregory H.E. Collection/ghe00169 ID. Gregory, H.E. 169 Black Creek Valley, west edge Todilto Park, La Plata sandstone, McKinley County, New Mexico, Fort Defiance quadrangle. July, 1913. #1:/Gregory H.E. Collection/ghe00170 ID. Gregory, H.E. 170 Chinle formation, Pueblo Colorado Wash, Apache County, Arizona, Fort Defiance quadrangle. July, 1913. #1:/Gregory H.E. Collection/ghe00171 ID. Gregory, H.E. 171 Chinle formation, Pueblo Colorado Wash, Apache County, Arizona, Fort Defiance quadrangle. July, 1913. #1:/Gregory H.E. Collection/ghe00172 ID. Gregory, H.E. 172 Pilot Rock, looking north across Pueblo Colorado Wash, Navajo County, Arizona. Port Defiance quadrangle. The buttes in foreground and middle distance are igneous. July, 1913. #1:/Gregory H.E. Collection/ghe00173 ID. Gregory, H.E. 173 Slab talus, Moenkopi formation near Holbrook, Navajo County, Arizona, Holbrook quadrangle. July, 1913. #1:/Gregory H.E. Collection/ghe00174 ID. Gregory, H.E. 174 Gypsum seams in Moenkopi strata 2 miles east of Holbrook, Navajo County, Arizona, Holbrook quadrangle. July, 1913. #1:/Gregory H.E. Collection/ghe00175 ID. Gregory, H.E. 175 Gypsum seams in Moenkopi strata 2 miles east of Holbrook, Navajo County, Arizona, Holbrook quadrangle July, 1913. #1:/Gregory H.E. Collection/ghe00176 ID. Gregory, H.E. 176 Moenkopi formation near Holbrook, Navajo County, Arizona, Holbrook quadrangle. July, 1913. #1:/Gregory H.E. Collection/ghe00177 ID. Gregory, H.E. 177 Dry bed of Little Colorado, 8 Miles below Winslow, Arizona. Navajo County, Arizona, Tusayan quadrangle. July, 1913. #1:/Gregory H.E. Collection/ghe00178 ID. Gregory, H.E. 178 Ripple Marks, Moenkopi formation, month of Canyon Diablo. Coconino County, Arizona, Tusayan quadrangle July, 1913. #1:/Gregory H.E. Collection/ghe00179 ID. Gregory, H.E. 179 Moenkopi formation near Leupp, Coconino County, Arizona, Tusayan quadrangle. July, 1913. #1:/Gregory H.E. Collection/ghe00180 ID. Gregory, H.E. 180 View in Painted Desert, Newberry Mesa, Coconino County, Arizona, Tusayan quadrangle. Strata of Chinle formation. July, 1913. #1:/Gregory H.E. Collection/ghe00181 ID. Gregory, H.E. 181 View in Painted Desert, 10 miles north of Tolchico, Coconino County, Arizona, San Francisco Mountain quadrangle. July, 1913. #1:/Gregory H.E. Collection/ghe00182 ID. Gregory, H.E. 182 View in Painted Desert, 10 miles north of Tolchaco, Coconino County, Arizona, San Francisco Mountain quadrangle. View of lake in background is mirage. July, 1913. #1:/Gregory H.E. Collection/ghe00183 ID. Gregory, H.E. 183 Kaibab limestone at contact with Moenkopi formation, Wolf Grossing, Coconino County, Arizona, San Francisco Mountain quadrangle. July, 1913. #1:/Gregory H.E. Collection/ghe00184 ID. Gregory, H.E. 184 Solution cavities, Kaibab limestone, Little Colorado Valley, 22 Miles east of Tolchico, Coconino County, Arizona, San Francisco quadrangle. July, 1913. #1:/Gregory H.E. Collection/ghe00185 ID. Gregory, H.E. 185 Grand Falls, Little Colorado Paver, Coconino County, Arizona, San Francisco quadrangle. Falls 130 feet high, the face composed of Kaibab limestone, the strata on top at the right is Moenkopi, at the left lavas. July, 1913. (Panorama with 186). #1:/Gregory H.E. Collection/ghe00186 ID. Gregory, H.E. 186 Grand Falls, Little Colorado Paver, Coconino County, Arizona, San Francisco quadrangle. Falls 130 feet high, the face composed of Kaibab limestone, the strata on top at the right is Moenkopi, at the left lavas. July, 1913. (Panorama with 185). #1:/Gregory H.E. Collection/ghe00187 ID. Gregory, H.E. 187 Grand Falls, Little Colorado River, Coconino County, Arizona, San Franciso quadrangle. Showing Moenkopi strata overlying Kaibab limestone. July, 1913. (Panorama with 188). #1:/Gregory H.E. Collection/ghe00188 ID. Gregory, H.E. 188 Grand Falls, Little Colorado River, Coconino County, Arizona, San Franciso quadrangle. Showing Moenkopi strata overlying Kaibab limestone. July, 1913. (Panorama with 187). #1:/Gregory H.E. Collection/ghe00189 ID. Gregory, H.E. 189 Bed of Little Colorado immediately above the crest of Grand Falls, Coconino County, Arizona, San Francisco quadrangle. The rock in background is part of the basalt flow which has blocked the base of the canyon, tins producing the falls. July, 1913. #1:/Gregory H.E. Collection/ghe00190 ID. Gregory, H.E. 190 Kaibab limestone, canyon of Little Colorado, between Grand Falls and Black Falls, Coconino County, Arizona, San Francisco Mountain quadrangle. July, 1913. #1:/Gregory H.E. Collection/ghe00191 ID. Gregory, H.E. 191 Moenkopi formation immediately overlying Kaibab limestone at Grand Falls, Coconino County, Arizona, San Francisco quadrangle. July, 1913 #1:/Gregory H.E. Collection/ghe00192 ID. Gregory, H.E. 192 View in Painted Desert, between Grand Palls and Black Falls, Coconino County, Arizona, San Francisco quadrangle. July, 1913. #1:/Gregory H.E. Collection/ghe00193 ID. Gregory, H.E. 193 Black Falls, Little Colorado Valley, looking upstream. At the time the picture was taken the canyon was filled with wind-blown sand to the level of the crest of the falls. San Francisco quadrangle, Coconino County, Arizona. July, 1913. #1:/Gregory H.E. Collection/ghe00194 ID. Gregory, H.E. 194 Wall of Little Colorado Canyon below Government suspension bridge, Moenkopi strata overlain by Shinarump conglomerate. San Francisco quadrangle, Coconino County, Arizona. July, 1913. #1:/Gregory H.E. Collection/ghe00195 ID. Gregory, H.E. 195 Wall of Little Colorado Canyon, near mouth of Moenkopi, San Francisco quadrangle. San Francisco quadrangle, Coconino County, Arizona. July, 1913. #1:/Gregory H.E. Collection/ghe00196 ID. Gregory, H.E. 196 Moenkopi strata, Little Colorado Valley, 1+ mile below the mouth of Moenkopi, San Francisco quadrangle. Coconino County, Arizona. July, 1913. #1:/Gregory H.E. Collection/ghe00197 ID. Gregory, H.E. 197 Little Colorado Canyon, viewed from the rim 6 miles below the Government suspension bridge, Moenkopi strata capped by Shinarump conglomerate. The left canyon wall is lava. Coconino Plateau in the background. San Francisco quadrangle, Coconino County, Arizona. July, 1913. #1:/Gregory H.E. Collection/ghe00198 ID. Gregory, H.E. 198 "Painted Desert" beds, Moenkopi Wash, San Francisco quadrangle, Coconino County, Arizona. July, 1913. #1:/Gregory H.E. Collection/ghe00199 ID. Gregory, H.E. 199 "Painted Desert" beds, Moenkopi Wash, San Francisco quadrangle, Coconino County, Arizona. July, 1913. #1:/Gregory H.E. Collection/ghe00200 ID. Gregory, H.E. 200 Wind erosion, Kaibito Plateau, near Tuba, Arizona, Coconino County, Echo Cliffs quadrangle. July, 1913. #1:/Gregory H.E. Collection/ghe00201 ID. Gregory, H.E. 201 Wind erosion, Kaibito Plateau, near Tuba, Arizona, Coconino County, Echo Cliffs quadrangle. July, 1913. #1:/Gregory H.E. Collection/ghe00202 ID. Gregory, H.E. 202 Wind erosion, Kaibito Plateau, near Tuba, Arizona, Goconino County, Echo Cliffs quadrangle. July, 1913 #1:/Gregory H.E. Collection/ghe00203 ID. Gregory, H.E. 203 Wind erosion, Kaibito Plateau, near Tuba, Arizona, Coconino County, Echo Cliffs quadrangle. July, 1913. #1:/Gregory H.E. Collection/ghe00204 ID. Gregory, H.E. 204 Wind erosion, Kaibito Plateau, near Tuba, Arizona, Coconino County, Echo Cliffs quadrangle. July, 1913. #1:/Gregory H.E. Collection/ghe00205 ID. Gregory, H.E. 205 Traveling dune, Kaibito Plateau, between Tuba and Red Lake, Coconino County, Arizona, Echo Cliffs quadrangle. July, 1913. #1:/Gregory H.E. Collection/ghe00206 ID. Gregory, H.E. 206 Dune filling Reservoir Canyon, Kaibito Plateau, near Tuba, Arizona, Coconino County, Echo Cliffs quadrangle. July, 1913. #1:/Gregory H.E. Collection/ghe00207 ID. Gregory, H.E. 207 Moenkopi Wash, showing cultivated fields of the Tuba Oasis, Coconino County, Arizona, Echo Cliffs quadrangle. July, 1913. #1:/Gregory H.E. Collection/ghe00208 ID. Gregory, H.E. 208 General view, Petrified Forest, Lithodendron Creek, Apache and Navajo counties, Arizona. Fort Defiance quadrangle. July, 1913. #1:/Gregory H.E. Collection/ghe00209 ID. Gregory, H.E. 209 View Petrified Forest, Lithodendron Wash, Apache and Navajo counties, Arizona. Fort Defiance quadrangle. Chinle formation. August, 1913. #1:/Gregory H.E. Collection/ghe00210 ID. Gregory, H.E. 210 View Petrified Forest, Lithodendron Wash, Apache and Navajo counties, Arizona. Fort Defiance quadrangle. Chinle formation. August, 1913. #1:/Gregory H.E. Collection/ghe00211 ID. Gregory, H.E. 211 View Petrified Forest, Lithodendron Wash, Apache and Navajo comities, Arizona. Fort Defiance quadrangle. Chinle formation. August, 1913. #1:/Gregory H.E. Collection/ghe00212 ID. Gregory, H.E. 212 View Petrified Forest, Lithodendron Wash, Apache and Navajo counties, Arizona. Fort Defiance quadrangle. Chine formation. August, 1913. #1:/Petrified Forest National Park/ghe00213 ID. Gregory, H.E. 213 Petrified Forest National Park, Arizona. Petrified logs on Lithodendron Wash. 1913. #1:/Petrified Forest National Park/ghe00214 ID. Gregory, H.E. 214 Petrified Forest National Park, Arizona. Petrified log on Lithodendron Wash. 1913. #1:/Gregory H.E. Collection/ghe00215 ID. Gregory, H.E. 215 Alluvium bank of Moenkopi near Government farm. Coconino County, Arizona, Echo Cliffs quadrangle. Cut since 1885. August, 1914. #1:/Gregory H.E. Collection/ghe00216 ID. Gregory, H.E. 216 Dike of diabase, Ward Terrace, Coconino County, Arizona. Echo Cliffs quadrangle. August, 1914. #1:/Gregory H.E. Collection/ghe00217 ID. Gregory, H.E. 217 Wind made basin, Moenkopi Plateau, Coconino County, Arizona. San Francisco Mountain quadrangle. August, 1914. #1:/Gregory H.E. Collection/ghe00218 ID. Gregory, H.E. 218 "Painted Desert" beds, Moenkopi Wash, Coconino County, Arizona. Echo Cliffs quadrangle. Undifferentiated Jurassic. August, 1914. #1:/Gregory H.E. Collection/ghe00219 ID. Gregory, H.E. 219 "Painted Desert" beds, Moenkopi Wash, Coconino County, Arizona. Echo Cliffs quadrangle. Undifferentiated Jurassic. August, 1914, #1:/Gregory H.E. Collection/ghe00220 ID. Gregory, H.E. 220 Painted Desert beds, Espejo Springs, Moenkopi Plateau, Coconino County, Arizona. San Francisco Mountain quadrangle. Undifferentiated Jurassic. August, 1914. #1:/Gregory H.E. Collection/ghe00221 ID. Gregory, H.E. 221 Blue Canyon peneplain, Blue Canyon, Coconino and Navajo counties, Arizona. Marsh Pass quadrangle. McElmo formation. August, 1914. #1:/Gregory H.E. Collection/ghe00222 ID. Gregory, H.E. 222 McElmo-Dakota contact, Moenkopi Valley, 3 miles above Blue Canyon, Navajo County, Arizona. Marsh Pass quadrangle. August, 1914. #1:/Gregory H.E. Collection/ghe00223 ID. Gregory, H.E. 223 McElmo-Mancos contact near Blue Canyon, Navajo County, Arizona, Marsh Pass quadrangle. August, 1914. #1:/Gregory H.E. Collection/ghe00224 ID. Gregory, H.E. 224 Navajo sandstone. McElmo contact, Blue Canyon, Coconino County, Arizona. Marsh Pass quadrangle. August, 1914. #1:/Gregory H.E. Collection/ghe00225 ID. Gregory, H.E. 225 Erosion forms, McElmo formation, near Blue Canyon store, Navajo County, Arizona, Marsh Pass quadrangle. August, 1914. #1:/Gregory H.E. Collection/ghe00226 ID. Gregory, H.E. 226 Comb Monocline, Marsh Pass, Navajo Comity, Arizona. Marsh Pass quadrangle. August, 1914. #1:/Gregory H.E. Collection/ghe00227 ID. Gregory, H.E. 227 Marsh Pass, looking west, Navajo County, Arizona. Marsh Pass quadrangle. Comb Monocline on right; edge of Black Mesa on left. August, 1914. #1:/Gregory H.E. Collection/ghe00228 ID. Gregory, H.E. 228 Harsh Pass looking east, Navajo County, Arizona. Marsh Pass quadrangle. August, 1914. #1:/Gregory H.E. Collection/ghe00229 ID. Gregory, H.E. 229 Church Rock, Tyende Valley, Navajo County, Arizona. Harsh Pass quadrangle. Volcanic neck of mouchiquite and agglomerate. August, 1914. #1:/Gregory H.E. Collection/ghe00230 ID. Gregory, H.E. 230 South peak of Porras dikes. Navajo County, Arizona, Marsh Pass quadrangle. The high mass is agglomerate and mouchiquite; the wall is La Plata sandstone. August, 1914. #1:/Gregory H.E. Collection/ghe00231 ID. Gregory, H.E. 231 South face of Garnet Ridge, Apache County, Arizona, Canyon de Chelly quadrangle. Erratics are igneous metarnorphic and sedimentary bowlders from intrusion of volcanic conglomerate. Man is standing on conglomerate bed. August, 1914. #1:/Gregory H.E. Collection/ghe00232 ID. Gregory, H.E. 232 Erratics, Garnet Ridge, Apache County, Arizona, Canyon de Chelly quadrangle. August, 1914 #1:/Gregory H.E. Collection/ghe00233 ID. Gregory, H.E. 233 Erratics, Garnet Ridge, Apache County, Arizona, Canyon de Chelly quadrangle. August, 1914 #1:/Gregory H.E. Collection/ghe00234 ID. Gregory, H.E. 234 Erratics, Garnet Ridge, Apache County, Arizona, Canyon de Chelly quadrangle. August, 1914. #1:/Gregory H.E. Collection/ghe00235 ID. Gregory, H.E. 235 Erratics, Garnet Ridge, Apache County, Arizona, Canyon de Chelly quadrangle. August, 1914 #1:/Gregory H.E. Collection/ghe00236 ID. Gregory, H.E. 236 Erratics, Garnet Ridge, Apache County, Arizona, Canyon de Chelly quadrangle. August, 1914. #1:/Gregory H.E. Collection/ghe00237 ID. Gregory, H.E. 237 Detail structure, McElmo formation, Garnet Ridge, Apache County, Canyon de Chelly quadrangle. August, 1914. #1:/Gregory H.E. Collection/ghe00238 ID. Gregory, H.E. 238 Joints, McElmo formation, Garnet Ridge, Apache County, Arizona, Canyon de Chelly quadrangle. August, 1914. #1:/Gregory H.E. Collection/ghe00239 ID. Gregory, H.E. 239 Lower Chinle Valley, looking southwest along Comb Monocline, San Juan County, Utah, Abajo quadrangle. Valley cut in Chinle formation; La Plata on the left, de Chelly sandstone forms broken ridge on right. August, 1914. #1:/Gregory H.E. Collection/ghe00240 ID. Gregory, H.E. 240 Lower Chinle Valley, San Juan County, Utah, Abajo quadrangle. Part of Comb Monocline. Mule ear in distance. La Plata sandstone in distance, de Chelly sandstone in foreground, Chinle formation in middle distance. August, 1914. #1:/Gregory H.E. Collection/ghe00241 ID. Gregory, H.E. 241 Chinle formation near Moses Rock, San Juan County, Utah, Abajo quadrangle. Part of Comb Monocline. August, 1914 #1:/Gregory H.E. Collection/ghe00242 ID. Gregory, H.E. 242 Alluvium wall of Chinle Creek near Hoses Hock, San Juan County, Utah. Abajo quadrangle. August, 1914. #1:/Gregory H.E. Collection/ghe00243 ID. Gregory, H.E. 243 Junction of Chinle Creek and San Juan River, looking north from Mule Ear along Comb Monocline-River is 600 feet below point of view. August, 1914. #1:/Gregory H.E. Collection/ghe00244 ID. Gregory, H.E. 244 Head of canyon of San Juan, east limb of Raplee Anticline, San Juan County, Utah, Abajo quadrangle. Strata in foreground, Triassic and Permian Canyon is cut in Pennsylvanian. August, 1914. #1:/Gregory H.E. Collection/ghe00245 ID. Gregory, H.E. 245 Wall of de Chelly sandstone capped by Shinarump conglomerate and underlain by the Moenkopi formation near Meridian Butte, Monument Valley, Apache County, Arizona, Canyon de Chelly quadrangle. August, 1914. #1:/Gregory H.E. Collection/ghe00246 ID. Gregory, H.E. 246 Gross bedded de Chelly sandstone, head of Creek, Navajo County, Arizona, Marsh Pass quadrangle. August, 1914. #1:/Gregory H.E. Collection/ghe00247 ID. Gregory, H.E. 247 Cross bedded de Chelly sandstone, head of Gyp stun Creek, Navajo County, Arizona, Marsh Pass quadrangle. August, 1914 #1:/Gregory H.E. Collection/ghe00248 ID. Gregory, H.E. 248 Cross bedded de Chelly sandstone, head of Gypsum Creek, Navajo County, Arizona, Marsh Pass quadrangle. August, 1914 #1:/Gregory H.E. Collection/ghe00249 ID. Gregory, H.E. 249 de Chelly sandstone, near head of Gypsum Valley, Navajo County, Arizona, Marsh Pass quadrangle. Solution cavities simulating wind drilled holes. August, 1914. #1:/Gregory H.E. Collection/ghe00250 ID. Gregory, H.E. 250 Wind erosion, Kaibito Plateau, Coconino County, Arizona, Echo Cliffs quadrangle. August, 1914. #1:/Gregory H.E. Collection/ghe00251 ID. Gregory, H.E. 251 Wind erosion, Kaibito Plateau, Coconino County, Arizona, Echo Cliffs quadrangle. August, 1914 #1:/Gregory H.E. Collection/ghe00252 ID. Gregory, H.E. 252 Wind erosion, Kaibito Plateau, Coconino County, Arizona, Echo Cliffs quadrangle. August, 1914. #1:/Gregory H.E. Collection/ghe00253 ID. Gregory, H.E. 253 Wind erosion, Kaibito Plateau, Coconino County, Arizona, Echo Cliffs quadrangle. August, 1914. #1:/Gregory H.E. Collection/ghe00254 ID. Gregory, H.E. 254 Wind erosion, Kaibito Plateau, Coconino County, Arizona, Echo Cliffs quadrangle. August, 1914. #1:/Gregory H.E. Collection/ghe00255 ID. Gregory, H.E. 255 Wind erosion, Kaibito Plateau, Coconino County, Arizona, Echo Cliffs quadrangle. August, 1914. #1:/Gregory H.E. Collection/ghe00256 ID. Gregory, H.E. 256 Wind erosion, Kaibito Plateau, Coconino County, Arizona, Echo Cliffs quadrangle. August, 1914. #1:/Gregory H.E. Collection/ghe00257 ID. Gregory, H.E. 257 Traveling dune, Kaibito Plateau, Coconino County, Arizona. Echo Cliffs quadrangle. August, 1914. #1:/Gregory H.E. Collection/ghe00258 ID. Gregory, H.E. 258 Traveling dime, Kaibito Plateau, Coconino County, Arizona, Echo Cliffs quadrangle. August, 1914. #1:/Gregory H.E. Collection/ghe00259 ID. Gregory, H.E. 259 Traveling dune, Kaibito Plateau, Coconino County, Arizona. Echo Cliffs quadrangle. August, 1914. #1:/Gregory H.E. Collection/ghe00260 ID. Gregory, H.E. 260 Dunes filling Reservoir Canyon, near Tuba, Coconino County, Arizona. Echo Cliffs quadrangle. August, 1914. #1:/Gregory H.E. Collection/ghe00261 ID. Gregory, H.E. 261 Dunes filling Reservoir Canyon, near Tuba, Arizona. Echo Cliffs quadrangle. August, 1914 #1:/Gregory H.E. Collection/ghe00262 ID. Gregory, H.E. 262 Dunes filling Reservoir Canyon, near Tuba County, Arizona. Echo Cliffs quadrangle. August, 1914 #1:/Gregory H.E. Collection/ghe00263 ID. Gregory, H.E. 263 Dunes filling Reservoir Canyon, near Tuba County, Arizona. Echo Cliffs quadrangle, August, 1914 #1:/Gregory H.E. Collection/ghe00264 ID. Gregory, H.E. 264 Lake in Begashibito Canyon, formed by drifting sand which, separates the canyon into compartments, Navajo County, Arizona, Marsh Pass quadrangle. August, 1914. #1:/Gregory H.E. Collection/ghe00267 ID. Gregory, H.E. 267 Typical vegetation, Kaibito Plateau, elevation 6,000 feet. Coconino County, Arizona. Marsh Pass quadrangle. August, 1914. #1:/Gregory H.E. Collection/ghe00268 ID. Gregory, H.E. 268 Cross bedding, Navajo sandstone, Kaibito Plateau, Coconino County, Echo Cliffs quadrangle. August, 1914. #1:/Gregory H.E. Collection/ghe00269 ID. Gregory, H.E. 269 Cross bedding, Navajo sandstone, Kaibito Plateau, Coconino County, Echo Cliffs quadrangle. August, 1914, #1:/Gregory H.E. Collection/ghe00270 ID. Gregory, H.E. 270 Cross bedding, Navajo sandstone, Kaibito Plateau, Coconino County, Echo Cliffs quadrangle. August, 1914. #1:/Gregory H.E. Collection/ghe00271 ID. Gregory, H.E. 271 Cross bedding, Navajo sandstone, Kaibito Plateau, Coconino County, Echo Cliffs quadrangle. August, 1914. #1:/Gregory H.E. Collection/ghe00272 ID. Gregory, H.E. 272 The Oasis of Tuba, Coconino County Arizona, Cliffs quadrangle, viewed from the north. August, 1914. #1:/Gregory H.E. Collection/ghe00273 ID. Gregory, H.E. 273 Street, Oasis of Tuba, Coconino County, Arizona, Echo Cliffs quadrangle, viewed from the north. August, 1914. #1:/Gregory H.E. Collection/ghe00274 ID. Gregory, H.E. 274 The Oasis of Moa Ave, Coconino County, Arizona, Echo Cliffs quadrangle, cliff formed of "Painted Desert" beds. August, 1914. #1:/Gregory H.E. Collection/ghe00275 ID. Gregory, H.E. 275 West face of Echo Cliffs, near Moa Ave, Coconino County, Arizona, Echo Cliffs quadrangle. Strata of "Painted Desert" beds. August, 1914. #1:/Gregory H.E. Collection/ghe00276 ID. Gregory, H.E. 276 View near Moenkopi village, Moenkopi Wash, Coconino County, Arizona, Echo Cliffs quadrangle. August, 1914. #1:/Gregory H.E. Collection/ghe00277 ID. Gregory, H.E. 277 Moenkopi village, Moenkopi Wash, Coconino County, Arizona, Echo Cliffs quadrangle. August, 1914. #1:/Gregory H.E. Collection/ghe00278 ID. Gregory, H.E. 278 Hopi cornfields at Moenkopi, Coconino County, Arizona, Echo Cliffs quadrangle. August, 1914. #1:/Gregory H.E. Collection/ghe00279 ID. Gregory, H.E. 279 Canyon of Little Colorado at Government bridge, Coconino Comity, Arizona, San Francisco Mountain quadrangle. Walls are of Moenkopi formation capped by Shinarump conglomerate. Coconino Point in the background. August, 1914. #1:/Gregory H.E. Collection/ghe00280 ID. Gregory, H.E. 280 de Chelly Sandstone Nazlini Canyon Apache County, Arizona. Fort Defiance quadrangle. Natural Window in left foreground. cc 1914. #1:/Gregory H.E. Collection/ghe00281 ID. Gregory, H.E. 281 Meanders, San Juan Canyon, San Juan County, Utah. Stream is crossing Mitten Butte anticline. Strata Goodridge formation (Pennsylvanian). Photograph copyrighted by H.H. Vinson. cc 1914. #1:/Gregory H.E. Collection/ghe00283 ID. Gregory, H.E. 283 LaPlata sandstone (Navajo sandstone) near Moenkopi Village, Coconino County, Arizona. June 1, 1915. #1:/Gregory H.E. Collection/ghe00284 ID. Gregory, H.E. 284 Water hole in Kaibab limestone, 3 + miles north of Limestone Tanks, Coconino County, Arizona. June 5, 1915. #1:/Gregory H.E. Collection/ghe00285 ID. Gregory, H.E. 285 View looking N.40 degrees W. up Paria River, Arizona, from top of Shinarup, south side of Colorado at Lees Ferry, Coconino County, Arizona. June 5, 1915. #1:/Gregory H.E. Collection/ghe00286 ID. Gregory, H.E. 286 View looking north across Colorado at Lees Ferry along Echo Monocline, Coconino County, Arizona. Strata beginning at base, Moenkopi, Shinarump, Chinle, LaPlata. Paria River at left. June 6, 1915. #1:/Gregory H.E. Collection/ghe00287 ID. Gregory, H.E. 287 View looking S. 50 degrees W. from south side Colorado at head of Marble Canyon, Coconino County, Arizona. Vermilion Cliffs in right background. June 6, 1915. #1:/Gregory H.E. Collection/ghe00288 ID. Gregory, H.E. 288 View looking south along face of Echo Cliffs, 2 + miles south of Lees Perry, Coconino County, Arizona. Standing on Shinarump conglomerate. June 6, 1915. #1:/Gregory H.E. Collection/ghe00289 ID. Gregory, H.E. 289 View looking south, West face Echo Cliffs, 2 miles south of Lees Ferry, Coconino County, Arizona. Standing on Shinarump conglomerate, Arizona. June 6, 1915. #1:/Gregory H.E. Collection/ghe00290 ID. Gregory, H.E. 290 Chinle shales at Echo Peak, Coconino County, Arizona. Standing on Shinarump conglomerate. June 6, 1915. #1:/Gregory H.E. Collection/ghe00291 ID. Gregory, H.E. 291 Vermilion cliff looking north across Marble Canyon: Kaibab in foreground, first bench Moenkopi capped by Shinarump, 2 + miles west of mouth of Paria River, Coconino County, Arizona, June, 1915. #1:/Gregory H.E. Collection/ghe00292 ID. Gregory, H.E. 292 Moenkopi shales, Echo Peak, south side, Colorado, 1 + miles below mouth of Paria River, Coconino County, Arizona. June 6, 1915. #1:/Gregory H.E. Collection/ghe00293 ID. Gregory, H.E. 293 Glen Canyon, Coconino County, Arizona, 3 + miles above Lees Ferry, looking up stream from south bank. June, 1915. #1:/Gregory H.E. Collection/ghe00294 ID. Gregory, H.E. 294 North wall Glen Canyon, 2 + miles above Lees Perry, Coconino County, Arizona. June 7, 1915. #1:/Gregory H.E. Collection/ghe00295 ID. Gregory, H.E. 295 Glen Canyon, 3 + miles above Lees Ferry, looking up stream from south bank. June, 1915. #1:/Gregory H.E. Collection/ghe00296 ID. Gregory, H.E. 296 LaPlata (Navajo) sandstone, Glen Canyon, 3 + miles above Lees Perry, Coconino County, Arizona. June, 1915. #1:/Gregory H.E. Collection/ghe00297 ID. Gregory, H.E. 297 View at head of Marble Canyon, looking at 40 degrees W. from base of LaPlata at point 3 + miles east of Paria River, Vermilion cliff at left Coconino County, Arizona. June, 1915. #1:/Gregory H.E. Collection/ghe00298 ID. Gregory, H.E. 298 "View of Vermilion cliffs looking across junction of Paria Colorado rivers, standing at base of Navajo sandstone, Coconino County, Arizona. June, 1915. #1:/Gregory H.E. Collection/ghe00299 ID. Gregory, H.E. 299 Trail from Lees Perry to top of plateau east of Paria River, Coconino County, Arizona. June, 1915. #1:/Gregory H.E. Collection/ghe00300 ID. Gregory, H.E. 300 McElmo strata on top of "Sentinal" formation, view standing on Navajo sandstone between Sentinal Rock and Warm creeks, Coconino County, Arizona. June, 1915. #1:/Gregory H.E. Collection/ghe00301 ID. Gregory, H.E. 301 McElmo formation on "Sentinal" formation between Sentinal Rock and Warm creeks, Coconino County, Arizona. June, 1915 #1:/Gregory H.E. Collection/ghe00302 ID. Gregory, H.E. 302 View Glen Canyon of Colorado, mouth of Warm, Coconino County, Arizona. Navajo sandstone. June, 1915. #1:/Gregory H.E. Collection/ghe00303 ID. Gregory, H.E. 303 Warm Creek near mouth, Coconino County, Arizona. Walls of Navajo sandstone. June, 1915. #1:/Gregory H.E. Collection/ghe00304 ID. Gregory, H.E. 304 Warm Creek Canyon, Coconino County. Arizona. Walls of Navajo sandstone. June, 1915. #1:/Gregory H.E. Collection/ghe00305 ID. Gregory, H.E. 305 Warm Creek Canyon, Coconino County, Arizona, one+ miles above mouth. June, 1915. #1:/Gregory H.E. Collection/ghe00306 ID. Gregory, H.E. 306 Warm Creek Canyon, Coconino County, Arizona. Navajo sandstone. June, 1915. #1:/Gregory H.E. Collection/ghe00307 ID. Gregory, H.E. 307 Contact of Navajo sandstone and "Sentinal" formation, east branch of Warm Creek, Coconino County, Arizona. June 8, 1915 #1:/Gregory H.E. Collection/ghe00308 ID. Gregory, H.E. 308 Banded cliff, McElmo (?) Formation capped by Dakota, 2 + miles east of Warm Creek, Kent County, Utah. June, 1915. #1:/Gregory H.E. Collection/ghe00309 ID. Gregory, H.E. 309 Cliffs of McElmo formation, two+ miles east of Warm Creek, Kent County, Utah. June 8, 1915. #1:/Gregory H.E. Collection/ghe00310 ID. Gregory, H.E. 310 View southeast across Glen Canyon from point 3 miles east of Warm Creek, Kent County, Utah. June, 1915. #1:/Gregory H.E. Collection/ghe00311 ID. Gregory, H.E. 311 Glen Canyon, 4 + miles above Grossing of the Fathers, Kent County, Utah. June, 1915. #1:/Gregory H.E. Collection/ghe00312 ID. Gregory, H.E. 312 Glen Canyon, 4 + miles above Crossing of the Fathers, Kent County, Utah. June, 1915. #1:/Gregory H.E. Collection/ghe00313 ID. Gregory, H.E. 313 Mesa Verde strata, west edge Kaiparowitz Plateau, Kent County, Utah. June, 1915. #1:/Gregory H.E. Collection/ghe00314 ID. Gregory, H.E. 314 Red Rock amphitheater cut in Monocline Upper Cliff Valley, Kaiparowitz Plateau, Kent County, Utah. Standing on Dakota rim at west. June, 1915. #1:/Gregory H.E. Collection/ghe00315 ID. Gregory, H.E. 315 Near head of "Cliff" Canyon, looking N. 70 degrees W. over Dakota toward Mancos and Mesa Verde(?), Kaiparowitz Plateau, Kent County, Utah. June 10, 1915. #1:/Gregory H.E. Collection/ghe00316 ID. Gregory, H.E. 316 Outfit at head of "Cliff" Canyon, Kaiparowitz Plateau, Kent County, Utah, Dakota sandstone, Mancos and Mesa Verde strata in distance. June 10, 1915. #1:/Gregory H.E. Collection/ghe00317 ID. Gregory, H.E. 317 North River, Kaiparowitz Plateau, near head of Last Chance Creek, Kent County, Utah. June 13, 1915. #1:/Gregory H.E. Collection/ghe00318 ID. Gregory, H.E. 318 Mesa Verde strata at Coal Mines 4 + miles south of Escalante, Garfield County, Utah. June, 1915. #1:/Gregory H.E. Collection/ghe00319 ID. Gregory, H.E. 319 LaPlata sandstone, north bank of Escalante Canyon, Garfield County, Utah. June, 1915. #1:/Gregory H.E. Collection/ghe00320 ID. Gregory, H.E. 320 Partly detached arch, first stage in formation of natural bridge in LaPlata sandstone, Escalante Canyon, Garfield County, Utah. June, 1915. #1:/Gregory H.E. Collection/ghe00321 ID. Gregory, H.E. 321 Cross bedding in LaPlata sandstone, Escalante Canyon, Garfield County, Utah. June, 1915 #1:/Gregory H.E. Collection/ghe00322 ID. Gregory, H.E. 322 LaPlata sandstone on Chinle shales, Silver Falls Canyon, Garfield County, Utah. June, 1915. #1:/Gregory H.E. Collection/ghe00323 ID. Gregory, H.E. 323 Camp Burr Flat, Water Pocket Valley, Garfield County, Utah. June, 1915. #1:/Gregory H.E. Collection/ghe00324 ID. Gregory, H.E. 324 Water Pocket Monocline, Garfield County, Utah, looking N. 15 degrees W. June, 1915. #1:/Gregory H.E. Collection/ghe00325 ID. Gregory, H.E. 325 Mancos shales, Pine Alcove Valley, Garfield County, Utah. June, 1915, #1:/Gregory H.E. Collection/ghe00326 ID. Gregory, H.E. 326 Mancos shales. Pine Alcove Valley, Garfield County, Utah. June, 1915. #1:/Gregory H.E. Collection/ghe00327 ID. Gregory, H.E. 327 Mancos shales, Water Pocket Canyon, Garfield County, Utah. June, 1915. #1:/Gregory H.E. Collection/ghe00328 ID. Gregory, H.E. 328 Mancos and Mesa Verde strata, Pine Alcove Valley, looking toward Mount Hillers, Garfield County, Utah. June, 1915. #1:/Gregory H.E. Collection/ghe00329 ID. Gregory, H.E. 329 Mount Holmes looking southeast from base of Mount Hillers at Star Ranch, Garfield County, Utah. June, 1915. #1:/Gregory H.E. Collection/ghe00330 ID. Gregory, H.E. 330 Mount Hillers looking north from Star Ranch, Garfield County, Utah. June, 1915. #1:/Gregory H.E. Collection/ghe00331 ID. Gregory, H.E. 331 Trachyte Canyon, Garfield County, Utah. Walls of LaPlata sandstone, June, 1915. #1:/Gregory H.E. Collection/ghe00332 ID. Gregory, H.E. 332 Colorado River looking south, 3 + miles above Hite, Garfield County, Utah. June 19, 1915. #1:/Gregory H.E. Collection/ghe00333 ID. Gregory, H.E. 333 Crossing of Colorado 3 + miles above Hite, Garfield County, Utah. Note horses swimming. June 19, 1915. #1:/Gregory H.E. Collection/ghe00334 ID. Gregory, H.E. 334 Camp south edge of Elk Ridge at head of Grand Gulch, San Juan County, Utah. June, 1915. #1:/Gregory H.E. Collection/ghe00335 ID. Gregory, H.E. 335 Vegetation south slope of Bears Ears, Elk Ridge, San Juan County, Utah. June, 1915. #1:/Gregory H.E. Collection/ghe00336 ID. Gregory, H.E. 336 Canyon leading west from Elk Ridge, San Juan County, Utah, June, 1915. #1:/Gregory H.E. Collection/ghe00337 ID. Gregory, H.E. 337 Abajo Mountains looking east from Elk Ridge across Cottonwood Canyon, San Juan County, Utah. June, 1915. #1:/Gregory H.E. Collection/ghe00338 ID. Gregory, H.E. 338 Sheep Camp, Cottonwood Canyon, Abajo Mountains, San Juan County, Utah. June, 1915. #1:/Gregory H.E. Collection/ghe00339 ID. Gregory, H.E. 339 West wall of Allen Canyon, Abajo Mountains, San Juan County, Utah. McElmo strata. June, 1915. #1:/Gregory H.E. Collection/ghe00340 ID. Gregory, H.E. 340 LaPlata sandstone near Allen Canyon, Abajo Mountains, San Juan County, Utah. June, 1915. #1:/Gregory H.E. Collection/ghe00341 ID. Gregory, H.E. 341 Hatch Wash, 30 + miles north of Monticello, San Juan County, Utah. Butte of LaPlata sandstone (?) in distance. June 28, 1915. #1:/Gregory H.E. Collection/ghe00342 ID. Gregory, H.E. 342 Looking Glass Rock, Dry Valley, San Juan County, Utah. June, 1915. #1:/Gregory H.E. Collection/ghe00343 ID. Gregory, H.E. 343 State Utah, County Wayne. Date June, 1918 Near Hanksville. Red-brown and chocolate gypsum shales just below Dakota. #1:/Gregory H.E. Collection/ghe00344 ID. Gregory, H.E. 344 State Utah, County Wayne. Date June, 1918 Gypsum seams in Morrison banded shale, near Hanksville. #1:/Gregory H.E. Collection/ghe00345 ID. Gregory, H.E. 345 State Utah, County Emery. Date June, 1918 Capitol Reef Wash, San Rafael Swell. Wingate sandstone capped by Todilto. #1:/Gregory H.E. Collection/ghe00346 ID. Gregory, H.E. 346 State Utah, County Emery. Date June. 1918 Capitol Reef Wash, San Rafael Swell. Wingate sandstone. #1:/Gregory H.E. Collection/ghe00347 ID. Gregory, H.E. 347 State Utah, County Emery. Date June, 1918. Capitol Reef Wash, San Rafael Swell. Cavities in Wingate sandstone. #1:/Gregory H.E. Collection/ghe00348 ID. Gregory, H.E. 348 State Utah, County ?. Date June, 1918. Gypsum dike in Morrison sandstone between Notom and Bown's Ranch #1:/Gregory H.E. Collection/ghe00349 ID. Gregory, H.E. 349 State Utah, County Wayne. Date June, 1918. Southeast of Bown's Ranch. Cretaceous strata upturned on flank of water pocket fold. Henry Mts. in upper left. #1:/Gregory H.E. Collection/ghe00350 ID. Gregory, H.E. 350 State Utah, County Wayne. Date June, 1918. Looking east from Bitter Divide, head of Hall Creek. Cretaceous strata. #1:/Gregory H.E. Collection/ghe00351 ID. Gregory, H.E. 351 State Utah, County Garfield. Date June, 1918. Water Pocket Fold, view looking south. Red limestone, gypsum and sandstone, San Rafael group and Morrison overlying Navajo sandstone. Dakota in the distance. #1:/Gregory H.E. Collection/ghe00352 ID. Gregory, H.E. 352 State Utah, County Kane. Date June, 1918. Water Pocket Fold looking north on trail to Baker Ranch on Hall Creek. Landslide of Chinle material over Navajo. #1:/Gregory H.E. Collection/ghe00353 ID. Gregory, H.E. 353 State Utah, County Kane. Date June, 1918. Water Pocket Fold. Looking north 30 degrees West along Hall Creek, near where stream enters Navajo sandstone #1:/Gregory H.E. Collection/ghe00354 ID. Gregory, H.E. 354 State Utah, County Kane. Date June, 1918. Water Pocket Fold looking north along Hall Creek. Navajo sandstone to the right, San Rafael group at the left. #1:/Gregory H.E. Collection/ghe00355 ID. Gregory, H.E. 355 State Utah, County Kane. Date June, 1918. Water Pocket Fold near Baker Ranch, Hall Creek. Navajo sandstone #1:/Gregory H.E. Collection/ghe00356 ID. Gregory, H.E. 356 State Utah, County Kane. Date June, 1918. Water Pocket Fold near Baker Ranch, on Hall Creek. Entrada (?) Morrison. #1:/Gregory H.E. Collection/ghe00357 ID. Gregory, H.E. 357 State Utah, County Kane. Date June, 1918. Trail over Water Pocket Fold near Baker Ranch. Navajo sandstone. Trees mark position of "water pockets". #1:/Gregory H.E. Collection/ghe00358 ID. Gregory, H.E. 358 State Utah, County Kane. Date June, 1918. Trail over Water Pocket Fold west of Baker Ranch. LaPlata sandstone. #1:/Gregory H.E. Collection/ghe00359 ID. Gregory, H.E. 359 State Utah, County Kane. Date June, 1918. Water Pocket Fold. East entrance to Muley Twist trail. Wingate and Todilto. #1:/Gregory H.E. Collection/ghe00360 ID. Gregory, H.E. 360 State Utah, County Kane. Date: June 1918. Water Pocket Fold. West entrance to Muley Twist trail. Navajo on Todilto. #1:/Gregory H.E. Collection/ghe00361 ID. Gregory, H.E. 361 State Utah, County Kane. Date: June, 1918. Upper Silver Falls Canyon. Chinle strata below Wingate. #1:/Gregory H.E. Collection/ghe00362 ID. Gregory, H.E. 362 State Utah, County Garfield. Date: June, 1918. Harris Canyon, tributary to Escalante Canyon. Navajo strata. #1:/Gregory H.E. Collection/ghe00363 ID. Gregory, H.E. 363 State Utah, County Garfield. Date: June, 1918. Bank of Wash near Escalante. Texture like Dakota sandstone. #1:/Gregory H.E. Collection/ghe00364 ID. Gregory, H.E. 364 State Utah, County Kane. Date: June, 1918. Hole-in-the-Rock trail looking east across Colorado River. Navajo sandstone walls. #1:/Gregory H.E. Collection/ghe00365 ID. Gregory, H.E. 365 State Utah, County Kane. Date: June, 1918. Hole-in-the Bock Trail to the Colorado River, looking east. Walls of LaPlata sandstone. #1:/Gregory H.E. Collection/ghe00366 ID. Gregory, H.E. 366 State Utah. Date: June, 1918. County Wayne Escalante Monocline, looking south from a point 4 miles above mouth of Pine Creek. #1:/Gregory H.E. Collection/ghe00367 ID. Gregory, H.E. 367 State Utah, County Garfield. Date: June, 1918. Beaver dam at Boulder. #1:/Gregory H.E. Collection/ghe00368 ID. Gregory, H.E. 368 State Utah, County Garfield. Date: June, 1918. Escalante Canyon, Escalante Arch, natural bridge in Navajo sandstone. #1:/Gregory H.E. Collection/ghe00369 ID. Gregory, H.E. 369 State Utah, County Garfield. Date: June, 1918. Escalante Valley, looking northwest toward High Plateau from a point one mile west of Escalante. Morrison and Cretaceous strata. #1:/Gregory H.E. Collection/ghe00370 ID. Gregory, H.E. 370 State Utah, County Garfield. Date: June, 1918. Escalante Valley and Village, looking east across Escalante Village. South end of Escalante monocline in distance. #1:/Gregory H.E. Collection/ghe00371 ID. Gregory, H.E. 371 State Utah, County Kane. Date: June, 1918. Bed of upper Wahweap Creek. Cretaceous strata. #1:/Gregory H.E. Collection/ghe00372 ID. Gregory, H.E. 372 State Utah, County Kane. Date: June, 1918. Along Wahweap Stream. Cross bedding in "Sentinel" (Entrada?) sandstone. #1:/Gregory H.E. Collection/ghe00373 ID. Gregory, H.E. 373 State Utah, County Kane. Date: June, 1918. Wahweap Canyon. Entrada (?) strata of San Rafael group. #1:/Gregory H.E. Collection/ghe00374 ID. Gregory, H.E. 374 State Utah, County Kane. Date: June, 1918. Wahweap Canyon. "Sentinel1" (Entrada?) sandstone. #1:/Gregory H.E. Collection/ghe00375 ID. Gregory, H.E. 375 State Utah, County Kane. Date: June, 1918. Middle of Wahweap Canyon. Mancos and Mesa Verde strata. #1:/Gregory H.E. Collection/ghe00376 ID. Gregory, H.E. 376 State Utah, County Kane. Date: June, 1918. Hog Back Dakota and lower beds, part of Cottonwood fold on Paria River. #1:/Gregory H.E. Collection/ghe00377 ID. Gregory, H.E. 377 State Utah, County Kane. Date: June, 1918. Local Peneplain on Paria River at mouth of Cottonwood Wash. Truncating part of upturned beds of Cottonwood fold at right. #1:/Gregory H.E. Collection/ghe00378 ID. Gregory, H.E. 378 State Utah, County Kane. Date: June, 1918. Near town of Paria. Chinle "marls." #1:/Gregory H.E. Collection/ghe00379 ID. Gregory, H.E. 379 State Utah, County Kane. Date: June, 1918. Bank of Paria River near Paria. Location of former irrigated farm. #1:/Gregory H.E. Collection/ghe00380 ID. Gregory, H.E. 380 State Utah, County Kane. Date: June, 1918. Bed of Paria River, site of former Village of Paria. #1:/Gregory H.E. Collection/ghe00381 ID. Gregory, H.E. 381 State Utah, County Garfield. Date: June, 1918. Escalante Vslley. Mesa Verde strata. #1:/Gregory H.E. Collection/ghe00382 ID. Gregory, H.E. 382 State Utah, County Garfield. Date: June, 1918. Escalante Monocline looking north along Pine Creek. Navajo and San Hafael strata. #1:/Gregory H.E. Collection/ghe00383 ID. Gregory, H.E. 383 State Utah, County Garfield. Date: June, 1918. Escalante Monocline looking north along Pine Creek. Rim of Aquarius Plateau in distance. Navajo and San Rafael strata. #1:/Gregory H.E. Collection/ghe00384 ID. Gregory, H.E. 384 State Utah, County Kane. Date: 1922. Glen Canyon of the Colorado, looking upstream from point 3+ miles east of Crossing of the Fathers, near Meskin Bar. Navajo sandstone in wall, San Bafael including "Sentinel" (Entrada?) in buttes. #1:/Gregory H.E. Collection/ghe00385 ID. Gregory, H.E. 385 State Utah County Kane. Date: 1922. Kane Springs Valley, east end of Ounsight Pass. Strata of Sentinel (Entrada?) formation. #1:/Gregory H.E. Collection/ghe00386 ID. Gregory, H.E. 386 State Utah County Kane. Date: 1923. Gunsight Pass leading from Last Chance Valley to Kane Springs Valley. Sandstone of "Sentinel" (Entrada?) formation. #1:/Gregory H.E. Collection/ghe00387 ID. Gregory, H.E. 387 State Utah, County Kane. Date: 1922. Kane Creek Valley. "Section B" banded red and white below heavy "Sentinel" (Entrada?) sandstone. #1:/Gregory H.E. Collection/ghe00388 ID. Gregory, H.E. 388 State Utah, County Kane. Date: 1922. Between Kane Creek and Rock Creek. Carmel formation and "Sentinel" (Entrada?) sandstone. #1:/Gregory H.E. Collection/ghe00389 ID. Gregory, H.E. 389 State Utah, County Kane. Date: 1922. Wall of White Rock aulch (tributary to Wahweap). "Sentinel" (Entrada?) sandstone. #1:/Gregory H.E. Collection/ghe00390 ID. Gregory, H.E. 390 State Utah, County Kane. Date: 1922. Moenkopi strata. Snabkaib member? Three + miles southwest of Paria. #1:/Gregory H.E. Collection/ghe00391 ID. Gregory, H.E. 391 State Utah, County Kane. Date: 1922. Remains of old Village of Paria on Paria Hiver. Chinle and overlying beds at left. #1:/Gregory H.E. Collection/ghe00392 ID. Gregory, H.E. 392 State Utah,County Kane. Date: 1922. Paria Valley. Looking northeast from a point on the west rim 4+ miles south of Cannonville. San Rafael and Morrison strata capped on Dakota. #1:/Gregory H.E. Collection/ghe00393 ID. Gregory, H.E. 393 State Utah, County Kane. Date: 1922. Chimney Park, Dry Valley. Tributary to Paria Canyon. Bench in front of Kaiparowits Plateau, San Hafael (?) and Morrison. #1:/Gregory H.E. Collection/ghe00394 ID. Gregory, H.E. 394 State Utah, County Kane. Date: 1922. Paria Canyon. 4+ miles above Paria Village. Banded red rocks top of Chinle. #1:/Gregory H.E. Collection/ghe00395 ID. Gregory, H.E. 395 State Utah, County Kane. Date: 1922. "White Cliffs" bordering canyon on east of Johnson Creek. #1:/Gregory H.E. Collection/ghe00396 ID. Gregory, H.E. 396 State Utah, County Kane. Date: 1922. Chinle beds of "Vermilion Cliffs" between Navajo wells and 16 mile spring. #1:/Gregory H.E. Collection/ghe00397 ID. Gregory, H.E. 397 State Arizona, County Coconino. Date: 1922. Kanat Canyon, above mouth of Jump Up Canyon. Surface and water pocket of "Esplanade" developed at top of Supai. #1:/Gregory H.E. Collection/ghe00398 ID. Gregory, H.E. 398 State Arizona, County Coconino. Date: 1922. Kanab Canyon, above Jump Up Canyon. Surface of "Esplanade" formed at top of Supai. #1:/Gregory H.E. Collection/ghe00399 ID. Gregory, H.E. 399 State Arizona, County Coconino. Date: 1922. Kanab Valley, above the mouth of Jump Up Canyon. Section is Supai, erosional unconformity, Hermit, Coconino, Kaibab sandstone, Kaibab limestone. #1:/Gregory H.E. Collection/ghe00400 ID. Gregory, H.E. 400 State Arizona, County Coconino. Date: 1922. Kanab Creek, view looking toward mouth of Hack's Canyon Stream intrenched in Supai, the top of which forms "Esplanade". Strata are Supai, Hermit and Coconino (forming slope), Kaibab sandstone and limestone, Kaibab cherty limestone. #1:/Gregory H.E. Collection/ghe00401 ID. Gregory, H.E. 401 State Arizona, County Coconino. Date: 1922. Kanab Canyon, 2 miles south, Little Springs Canyon. Section includes Hermit, Coconino, and Kaibab. #1:/Gregory H.E. Collection/ghe00402 ID. Gregory, H.E. 402 State Arizona, County Coconino. Date: 1922. Kanao Canyon, yiew near mouth of Little Springs Canyon. #1:/Gregory H.E. Collection/ghe00403 ID. Gregory, H.E. 403 State Arizona, County Coconino. Date: 1922. Kanab Canyon. Meander cusp 6 miles north of Snake Gulch. Supai, Hermit, Coconino, Kaibab. #1:/Gregory H.E. Collection/ghe00404 ID. Gregory, H.E. 404 State Arizona, County Coconino. Date: 1922. Kanab Canyon, 15+ miles south of Fredonia. Lowest limestone beds of Kaibab formation. #1:/Gregory H.E. Collection/ghe00405 ID. Gregory, H.E. 405 State California, County Inyo. Date: 1922. Desert pavement south end of Death Valley. #1:/Gregory H.E. Collection/ghe00406 ID. Gregory, H.E. 406 State Utah, County Garfield. Date: 1924. Banded red and white sands, immediately west of Cannonville. Morrison (?) #1:/Gregory H.E. Collection/ghe00407 ID. Gregory, H.E. 407 State Utah, County Garfield. Date: 1924. Near view of lower part of banded red and white sands, immediately west of Cannonville. Morrison (?) #1:/Gregory H.E. Collection/ghe00408 ID. Gregory, H.E. 408 State Utah, County Garfield. Date: 1924. Red sandstone west of Cannonville. Base of cliffs show in No. 407, locally cross-bedded. Morrison? (perhaps Entrada) has position of sandstone in cliffs at Bluff, Utah. #1:/Gregory H.E. Collection/ghe00409 ID. Gregory, H.E. 409 State Utah, County Garfield. Date: 1924. Red sandstone west of Cannonville. Base of cliffs show in No. 407, regular "beds. Morrison? (perhaps Intrada) has position of sandstone in cliffs at Bluff, Utah. #1:/Gregory H.E. Collection/ghe00410 ID. Gregory, H.E. 410 State Utah, County Garfield. Date: 1924. Red sandstone west of Cannonville. Base of cliffs show in No. 407, outlying butte. Morrison? (perhaps Entrada) has position of sandstone in cliffs at Bluff, Utah. #1:/Gregory H.E. Collection/ghe00411 ID. Gregory, H.E. 411 State Utah, County Garfield. Date: 1924. Sandstone and shale. Wall of Paria River, 3 miles below Cannonville. Lower beds 100 feet above top of Navajo sandstone. Entrada? and Summerville? #1:/Gregory H.E. Collection/ghe00412 ID. Gregory, H.E. 412 State Utah, County Kane. Date: 1924. Ripple-marked calcareous sandstone from bed 40 feet above top of Navajo sandstone, Hock Spring Gulch, 4 miles below Cannonville. Cannel formation.S.S. Johnson, packer, in foreground. #1:/Gregory H.E. Collection/ghe00413 ID. Gregory, H.E. 413 State Utah, County Kane. Date: 1924. General view, wall of Dry Valley, Morrison(?), with Dakota top. #1:/Gregory H.E. Collection/ghe00414 ID. Gregory, H.E. 414 State Utah, County Kane. Date: 1924. Banded shales with three beds of gypsum, Morrison (?), Cottonwood Wash. #1:/Gregory H.E. Collection/ghe00415 ID. Gregory, H.E. 415 State Utah, County Garfield. Date: 1924. Contact Morrison (?) and Dakota, Henrieville Wash. #1:/Gregory H.E. Collection/ghe00416 ID. Gregory, H.E. 416 State Utah, County Garfield. Date: 1924. View looking east across Paria Valley at Cannonville. Morrison ? and Dakota. #1:/Gregory H.E. Collection/ghe00417 ID. Gregory, H.E. 417 State Utah, County Kane. Date: 1924. Vegetation (pinon, cedar) in shales just above Navajo sandstone, Cottonwood fash. #1:/Gregory H.E. Collection/ghe00418 ID. Gregory, H.E. 418 General view upper two-thirds Morrison(?) beds, 1 mile southwest of Cannonville. Garfield County, Utah, 1924 #1:/Gregory H.E. Collection/ghe00419 ID. Gregory, H.E. 419 Rain erosion on cliffs near Cannonville with detail view showing change in massiveness of beds of Morrison(?) formation. Garfield County, Utah, 1924 #1:/Gregory H.E. Collection/ghe00420 ID. Gregory, H.E. 420 Yellow-red sandstone above gypsiferous shales, Morrison(?) formation 3 miles southeast of Cannonville. Garfield County, Utah. 1924. #1:/Gregory H.E. Collection/ghe00421 ID. Gregory, H.E. 421 Cliffs of Morrison(?) capped with Dakota. East flank of Cottonwood monocline, east side Dry Valley looking north. Top of Kaiparowits Plateau in distance. Kane County, Utah. 1924. #1:/Gregory H.E. Collection/ghe00422 ID. Gregory, H.E. 422 Consolidated wash materials in canyon east side Death Valley near Mormon Point. Inyo County, California. 1925 #1:/Gregory H.E. Collection/ghe00423 ID. Gregory, H.E. 423 Floor of Panamint Valley. Inyo County, California. 1925. #1:/Gregory H.E. Collection/ghe00424 ID. Gregory, H.E. 424 Monorail at west end of Wingate Pass, looking northeast. Inyo County, California, 1925. #1:/Gregory H.E. Collection/ghe00425 ID. Gregory, H.E. 425 West end of Wingate Pass, looking into Panamint Valley. Inyo County, California. 1925. #1:/Gregory H.E. Collection/ghe00426 ID. Gregory, H.E. 426 Fault-line scarp on east side of Panamint Valley. Inyo County, California. 1925. #1:/Gregory H.E. Collection/ghe00427 ID. Gregory, H.E. 427 Desert weathering 10 miles south of Ballarat. Inyo County, California. 1925. #1:/Gregory H.E. Collection/ghe00428 ID. Gregory, H.E. 428 Desert weathering along fault in alluvial fan. Inyo County, California. 1925. #1:/Gregory H.E. Collection/ghe00429 ID. Gregory, H.E. 429 Desert weathering, Panamint Valley. Inyo County, California. 1925. #1:/Gregory H.E. Collection/ghe00430 ID. Gregory, H.E. 430 Desert weathering, Panamint Valley, Inyo County, California. 1925. #1:/Gregory H.E. Collection/ghe00431 ID. Gregory, H.E. 431 Desert weathering, Panamint Valley, Inyo County, California. 1925. #1:/Gregory H.E. Collection/ghe00432 ID. Gregory, H.E. 432 Desert weathering, Panamint Valley. Inyo County, California. 1925 #1:/Gregory H.E. Collection/ghe00433 ID. Gregory, H.E. 433 Desert weathering, Panamint Valley. Inyo County, California. 1925. #1:/Gregory H.E. Collection/ghe00434 ID. Gregory, H.E. 434 Camp of Paiute Indians in Alien Canyon. San Juan County, Utah. 1925. #1:/Gregory H.E. Collection/ghe00435 ID. Gregory, H.E. 435 View looking northwest across White Canyon from a point about 5 miles west of Natural Bridges. Coconino (foreground), three divisions of Moenkopi capped by Shinarump (first cliffs), Chinle, and Wingate butte in left distance. San Juan County, Utah. 1925. #1:/Gregory H.E. Collection/ghe00436 ID. Gregory, H.E. 436 View of White Canyon from the top. Walls of Moenkopi capped by Shinarump; bottom reaches to Coconino. San Juan County, Utah. 1925. #1:/Gregory H.E. Collection/ghe00437 ID. Gregory, H.E. 437 Soft beds and hard beds in Coconino cliff in White Canyon. San Juan County, Utah. 1925. #1:/Gregory H.E. Collection/ghe00438 ID. Gregory, H.E. 438 Frey Canyon at junction with White Canyon. Coconino (floor of canyon), three divisions of Moenkopi, capped by Shinarump. Buttes of Chinle and Wingate (distance). San Juan County, Utah. 1925. #1:/Gregory H.E. Collection/ghe00439 ID. Gregory, H.E. 439 Parts of "lower" and "middle" Moenkopi between Red Canyon and Clay Hills. San Juan County, Utah. 1925. #1:/Gregory H.E. Collection/ghe00440 ID. Gregory, H.E. 440 East entrance to Clay Hills Pass. Moenkopi formation overlying strata at the top of the Organ Rock member of the Cutler formation. San Juan County, Utah. 1925. Published as plate 12-B in U.S. Geological Survey. Professional paper 188. 1938. #1:/Gregory H.E. Collection/ghe00441 ID. Gregory, H.E. 441 Variegated marls at Clay Hills. Chinle formation. San Juan County, Utah. 1925. Published as plate 12-D in U.S. Geological Survey. Professional paper 188. 1938. #1:/Gregory H.E. Collection/ghe00442 ID. Gregory, H.E. 442 Chinle formation capped by Wingate sandstone. San Juan County, Utah. 1925. #1:/Gregory H.E. Collection/ghe00443 ID. Gregory, H.E. 443 Tilted beds of Navajo sandstone on east flank of Castle Wash, Butte is on the crest. San Juan County, Utah. 1925. #1:/Gregory H.E. Collection/ghe00444 ID. Gregory, H.E. 444 Chinle beds exposed by stream traversing crest of "Castle Wash uplift." Wingate sandstone above. San Juan County, Utah. 1925. #1:/Gregory H.E. Collection/ghe00445 ID. Gregory, H.E. 445 General view of top of "Castle Wash uplift" at head of stream flowing east. Erosion surface developed on truncated Navajo beds. San Juan County, Utah. 1925. #1:/Gregory H.E. Collection/ghe00446 ID. Gregory, H.E. 446 Erosion surface developed on top of Castle uplift at east end of Wilson Mesa. Waterpocket Fold in distance. San Juan County, Utah. 1925. #1:/Gregory H.E. Collection/ghe00447 ID. Gregory, H.E. 447 Mule packtrain at waterpockets in Navajo sandstone near "Castle Wash uplift." San Juan County, Utah. 1925. #1:/Gregory H.E. Collection/ghe00448 ID. Gregory, H.E. 448 Walls of lower Castle Canyon, showing Todilto (at base of cliffs) and Navajo, San Juan County, Utah. 1925. #1:/Gregory H.E. Collection/ghe00449 ID. Gregory, H.E. 449 Wall of Castle Wash. Kayenta and Navajo formations. San Juan County, Utah. 1925. Published as plate 13-B in U.S. Geological Survey. Professional paper 188. 1938. #1:/Gregory H.E. Collection/ghe00450 ID. Gregory, H.E. 450 Sandstone cliffs in Castle Canyon showing Wingate, Todilto, and Navajo. San Juan County, Utah. 1925. #1:/Gregory H.E. Collection/ghe00451 ID. Gregory, H.E. 451 Crest of Clay Hills Divide looking east toward gulch. Chinle capped by Wingate. San Juan County, Utah. 1925. #1:/Gregory H.E. Collection/ghe00452 ID. Gregory, H.E. 452 Sandstone and shale in Armstrong Canyon. Upper part of Cedar Mesa member of the Cutler formation. San Juan County, Utah. 1925. Published as figure 9-D in U.S. Geological Survey. Professional paper 188. 1938. #1:/Gregory H.E. Collection/ghe00453 ID. Gregory, H.E. 453 Walls of White Canyon showing forms resulting from erosion of red shalelike bands that appear as lenses in massive crossed white Coconino sandstone. San Juan County, Utah. 1925. #1:/Gregory H.E. Collection/ghe00454 ID. Gregory, H.E. 454 Head of Armstrong Canyon looking northwest to junction with White Canyon. Canyon floor developed in Coconino, sides in Moenkopi capped by Shinarump. Distant mesas of Navajo. San Juan County, Utah. 1925. #1:/Gregory H.E. Collection/ghe00455 ID. Gregory, H.E. 455 Bears Ears viewed from the south. Cliffs are Chinle, capped by Wingate; foreground is Shinarump. Elk Ridge. San Juan County, Utah. 1925. #1:/Gregory H.E. Collection/ghe00456 ID. Gregory, H.E. 456 Bears Ears. Chinle strata. Elk Ridge. San Juan County, Utah. 1925. #1:/Gregory H.E. Collection/ghe00457 ID. Gregory, H.E. 457 Looking northeast toward Alien Canyon country across the crest of Comb monocline from head of Whiskers Creek. Abajo Mountain in distance. San Juan County, Utah. 1925. #1:/Gregory H.E. Collection/ghe00458 ID. Gregory, H.E. 458 Moenkopi and Chinle on Coconino. San Juan County, Utah, 1925. (Detail of photo no. 457) #1:/Gregory H.E. Collection/ghe00459 ID. Gregory, H.E. 459 East wall of Comb Wash near mouth of Arch Canyon. Chinle, Wingate, Todilto, Navajo. San Juan County, Utah. 1925. #1:/Gregory H.E. Collection/ghe00460 ID. Gregory, H.E. 460 Top of east wall of Comb Wash near mouth of Arch Canyon. Crest of Comb monocline. Strata of Glen Canyon group above Chinle. San Juan County, Utah. 1925. #1:/Gregory H.E. Collection/ghe00461 ID. Gregory, H.E. 461 Comb Wash at mouth of Arch Canyon. View looking north up the wash. Down-curved beds of Monument upwarp in left and middle distance; escarpment of Comb monocline at right; spur of Elk Ridge in left distance. San Juan County, Utah. 1925. Published as plate 16-B in U.S. Geological Survey. Professional paper 188. 1938. #1:/Gregory H.E. Collection/ghe00462 ID. Gregory, H.E. 462 Coconino sandstone (with cliff dwelling) exposed in wall near mouth of Arch Canyon. San Juan County, Utah. 1925. #1:/Gregory H.E. Collection/ghe00463 ID. Gregory, H.E. 463 Massive tilted beds in Coconino Arch Canyon. San Juan County, Utah. 1925. #1:/Gregory H.E. Collection/ghe00464 ID. Gregory, H.E. 464 Recent trenching of Whiskers Creek. San Juan County, Utah. 1925. #1:/Gregory H.E. Collection/ghe00465 ID. Gregory, H.E. 465 Yellow-red Entrada little above Navajo sandstone of Alien Canyon. San Juan County, Utah. 1925. #1:/Gregory H.E. Collection/ghe00466 ID. Gregory, H.E. 466 Entrada sandstone with thin beds above and below. South wall of Dry Wash. San Juan County, Utah. 1925. #1:/Gregory H.E. Collection/ghe00467 ID. Gregory, H.E. 467 Contact Navajo and Entrada, Dry Wash. San Juan County, Utah. 1925. #1:/Gregory H.E. Collection/ghe00468 ID. Gregory, H.E. 468 Dry Creek, Alien Canyon country. Entrada formation unconformably overlying Navajo sandstone (lower left). San Juan County, Utah. 1925. Published as plate 13-C in U.S. Geological Survey. Professional paper 188. 1938. #1:/Gregory H.E. Collection/ghe00469 ID. Gregory, H.E. 469 Gentle slopes of Morrison formation in Dry Wash. Entrada at the base (left). San Juan County, Utah. 1925. #1:/Gregory H.E. Collection/ghe00470 ID. Gregory, H.E. 470 Camp scene. Showing vegetation east slope of Elk Ridge. Head Butte Canyon branch of Arch Canyon. Shown are A.A. Baker and Edna Hope Gregory. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00471 ID. Gregory, H.E. 471 White sandstone resembling snow on Elk Ridge. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00472 ID. Gregory, H.E. 472 Aspens and yellow pine on Elk Ridge, San Juan County, Utah. May 1927. #1:/Gregory H.E. Collection/ghe00473 ID. Gregory, H.E. 473 Coconino sandstone overlaid by Moenkopi and underlaid by Supai. Dark Canyon, Elk Ridge, near mouth of Kigalia Canyon. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00474 ID. Gregory, H.E. 474 San Juan River looking south from a point near Goodridge. Stream gage in middle distance. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00475 ID. Gregory, H.E. 475 Shown in photo are Edna Hope, Gregory, A.A. Baker, E.T. McKnight standing on Goodridge bridge. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00476 ID. Gregory, H.E. 476 View looking down San Juan River from above Goodridge bridge. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00477 ID. Gregory, H.E. 477 View looking across San Juan River from a point 2+ miles west of Bluff. Bluff sandstone (Morrison?). Entrada on Carmel of Lee's Classification, San Juan County, Utah, 1927. #1:/Gregory H.E. Collection/ghe00478 ID. Gregory, H.E. 478 Coconino sandstone near head of Hammond Canyon. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00479 ID. Gregory, H.E. 479 Comb monocline looking north from Hammond Canyon. Coconino, Moenkopi, Shinarump. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00480 ID. Gregory, H.E. 480 South wall of Dry Wash, Entrada overlain by Summerville(?) and Salt Wash(?) Morrison, San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00481 ID. Gregory, H.E. 481 Wingate remnant on Chinle at junction of Posey Creek and Cottonwood Canyon. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00482 ID. Gregory, H.E. 482 Wingate on Chinle. Cottonwood Canyon near mouth of Notch Canyon. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00483 ID. Gregory, H.E. 483 Mancos Jim Butte looking N. 40 degrees W. Navajo, Carmel(?) Entrada. Comb monocline in distance and beyond it Moenkopi cliffs capped by Shinarump of Elk Ridge. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00484 ID. Gregory, H.E. 484 Navajo, Carmel(?) Entrada, east side of Alien Canyon near Mancos Jim Butte. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00485 ID. Gregory, H.E. 485 Erosion pillars in Entrada; Mancos Jim Butte at left. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00486 ID. Gregory, H.E. 486 Erosion in Entrada sandstone. Dry Wash. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00487 ID. Gregory, H.E. 487 Unconformity in Navajo and Entrada sandstones, Dry Wash. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00488 ID. Gregory, H.E. 488 Unconformity in Navajo and Entrada sandstones, Dry Wash. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00489 ID. Gregory, H.E. 489 Dakota on Morrison, north end of Black Mesa, west side of Cottonwood Canyon. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00490 ID. Gregory, H.E. 490 Wall of Arch Canyon, near Cathedral Arch. Massive Coconino. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00491 ID. Gregory, H.E. 491 Wall of Arch Canyon near Cathedral Arch. Bedded Coconino above Supai. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00492 ID. Gregory, H.E. 492 Cathedral Arch, Arch Canyon. Cedar Mesa sandstone. San Juan County, Utah. 1927. Published as plate 23-C in U.S. Geological Survey. Professional paper 188. 1938. #1:/Gregory H.E. Collection/ghe00493 ID. Gregory, H.E. 493 Supai beds below Coconino near Cathedral Arch, San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00494 ID. Gregory, H.E. 494 Wall of Arch Canyon, near Angel Arch (upper middle). Coconino(?) Supai. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00495 ID. Gregory, H.E. 495 Floor and walls of Arch Canyon. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00496 ID. Gregory, H.E. 496 View at mouth of Fish Creek. Supai with cap of attenuated Cocnino. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00497 ID. Gregory, H.E. 497 Looking north into Road Canyon from old Mormon road from Clay Hills to Bluff. Coconino cap rock in foreground. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00498 ID. Gregory, H.E. 498 Looking east down Fish Canyon near its head. Coconino over Supai. Comb monocline in the distance. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00499 ID. Gregory, H.E. 499 Coconino sandstone at Dripping Springs, Grand Gulch. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00500 ID. Gregory, H.E. 500 Looking northwest across Grand Plateau from near head of Fish Creek; Elk Ridge, with Bears Ears in distance. Coconino sandstone. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00501 ID. Gregory, H.E. 501 Butte of Moenkopi standing on Coconino of Grand Gulch Plateau between Snow Flat and Kane Draw. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00502 ID. Gregory, H.E. 502 Coconino at Dripping Springs, Grand Gulch, showing irregular bedding caused by lenses of red shale. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00503 ID. Gregory, H.E. 503 Coconino sandstone on rim of Grand Gulch near Dripping Springs. Recession of cliff along thin bed of red shale. Cliff dwelling under ledge. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00504 ID. Gregory, H.E. 504 Moenkopi cliff rising above Coconino, 6+ miles north of Clay Hills Divide. Top is massive wall about 100 feet high. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00505 ID. Gregory, H.E. 505 "Organ" weathering of sandstone near Clay Hills Divide. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00506 ID. Gregory, H.E. 506 Upper Moenkopi near Clay Hills Pass. Shinarump cap. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00507 ID. Gregory, H.E. 507 Camp in Lake Canyon. Walls of Navajo sandstone. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00508 ID. Gregory, H.E. 508 Lacustrine deposits, bed of former lake in Lake Canyon. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00509 ID. Gregory, H.E. 509 Lacustrine deposits, bed of former lake in Lake Canyon. San Juan County, Utah. 192?. #1:/Gregory H.E. Collection/ghe00510 ID. Gregory, H.E. 510 Trail up face of Gray Mesa (Wilson Mesa). Navajo sandstone. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00511 ID. Gregory, H.E. 511 Carmel overlying Navajo. Wilson Mesa. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00512 ID. Gregory, H.E. 512 Navajo sandstone at junction of Colorado and San Juan rivers. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00513 ID. Gregory, H.E. 513 Looking southeast across San Juan Canyon from point near its mouth. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00514 ID. Gregory, H.E. 514 Top of Wilson Mesa looking southwest. Navajo Mountain at left, Kaiparowits Plateau at right background. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00515 ID. Gregory, H.E. 515 Entrance to Moki Canyon at Red Cone Spring. Navajo sandstone capped by strata of San Rafael group. Dimensions indicated by comparison with pack train. San Juan County, Utah. 1927. Published as plate 6-C in U.S. Geological Survey. Professional paper 188. 1938. #1:/Gregory H.E. Collection/ghe00516 ID. Gregory, H.E. 516 Pack train going down the Moki Canyon trail in sand dunes near Red Cone Spring. Wingate, Todilto. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00517 ID. Gregory, H.E. 517 Wall of Moki Canyon. Chinle and Wingate. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00518 ID. Gregory, H.E. 518 Castle Butte on divide between White Canyon and Red Canyon. Chinle strata capped by Wingate sandstone. San Juan County, Utah. 1927. Published as plate 6-D in U.S. Geological Survey. Professional paper 188. 1938. #1:/Gregory H.E. Collection/ghe00519 ID. Gregory, H.E. 519 Looking north across White Canyon 6+ miles above its mouth. Canyon sunk into white Coconino (middle distance). Moenkopi capped by Shinarump forms buttes beyond. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00520 ID. Gregory, H.E. 520 Cliff of Moenkopi (lower and middle sections) White Canyon. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00521 ID. Gregory, H.E. 521 Moenkopi (lower and middle) showing organ weathering. White Canyon. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00522 ID. Gregory, H.E. 522 Comb monocline looking south from the Blanding-Kigalia road. Chinle capped by Wingate in left front; Shinarump at right sloping up to Elk Ridge. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00523 ID. Gregory, H.E. 523 Head of Comb Wash looking north across Milk Ranch Point. Moenkopi capped by Shinarump. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00524 ID. Gregory, H.E. 524 Detail of middle Moenkopi. Head of Comb Wash. San Juan County, Utah. 1927. #1:/Gregory H.E. Collection/ghe00525 ID. Gregory, H.E. 525 West face of Black Mesa. Upper part of Morrison formation (Brushy Basin shale member) capped by Dakota(?) sandstone. San Juan County, Utah. 1927. Published as plate 13-D in U.S. Geological Survey. Professional paper 188. 1938. #1:/Gregory H.E. Collection/ghe00526 ID. Gregory, H.E. 526 View in Johns Canyon near its junction with San Juan Canyon. Hermosa and Rico in canyon wall; Halgaito and Cedar Mesa in distance. San Juan County, Utah. 1928. Published as plate 11-A in U.S. Geological Survey. Professional paper 188. 1938. #1:/Gregory H.E. Collection/ghe00527 ID. Gregory, H.E. 527 Point on Cedar Mesa looking north from edge of Johns Canyon. Rico (foreground), Supai, Coconino on Supai. San Juan County, Utah. 1928. #1:/Gregory H.E. Collection/ghe00528 ID. Gregory, H.E. 528 South face of Cedar Mesa looking northeast from point near bank of Johns Canyon, Rico (foreground), Supai (slope), Coconino (cliff). San Juan County, Utah. 1928. #1:/Gregory H.E. Collection/ghe00529 ID. Gregory, H.E. 529 Johns Canyon, Coconino on Supai. San Juan County, Utah. 1928. #1:/Gregory H.E. Collection/ghe00530 ID. Gregory, H.E. 530 San Juan Canyon near Soda basin. Supai on Goodridge formation, San Juan County, Utah. 1928. #1:/Gregory H.E. Collection/ghe00531 ID. Gregory, H.E. 531 Wall of San Juan Canyon at east edge of Raplee monocline. Supai on Goodridge. San Juan County, Utah. 1928. #1:/Gregory H.E. Collection/ghe00532 ID. Gregory, H.E. 532 South wall of San Juan Canyon near west edge of Raplee monocline. Supai on Goodridge formation. San Juan County, Utah. 1928. #1:/Gregory H.E. Collection/ghe00533 ID. Gregory, H.E. 533 View on Recapture Creek. Undifferentiated Morrison formation. San Juan County, Utah. 1928. Published as plate 16-A in U.S. Geological Survey. Professional paper 188. 1938. #1:/Gregory H.E. Collection/ghe00534 ID. Gregory, H.E. 534 Gravel terrace near mouth of Recpature Creek. Developed on top of Bluff sandstone. San Juan Canyon in background (south). San Juan County, Utah. 1928. #1:/Gregory H.E. Collection/ghe00535 ID. Gregory, H.E. 535 Surface of Sage Plain between Recapture and West water canyons—sage brush with few pinons. San Juan County, Utah. 1928. #1:/Gregory H.E. Collection/ghe00536 ID. Gregory, H.E. 536 Looking south across San Juan at mouth of Comb Wash. Navajo sandstone at right of truncated beds. Erosion surface developed on tilted Chinle in center. Mules Ears in background. San Juan River here passes through Comb monocline. San Juan County, Utah. 1928. #1:/Gregory H.E. Collection/ghe00537 ID. Gregory, H.E. 537 Red Entrada(?) sandstone east side Butler Wash 1+ mile north of Bluff-Goodridge road. White streaks controlled by joints, tiny faults and cross-bedding laminae. San Juan County, Utah. 1928. #1:/Gregory H.E. Collection/ghe00538 ID. Gregory, H.E. 538 Wall of mesa north of San Juan River, 6+ miles west of Bluff. Entrada(?) at the base, Summerville(?), Bluff sandstone (Morrison?). San Juan County, Utah. 1928. #1:/Gregory H.E. Collection/ghe00539 ID. Gregory, H.E. 539 South wall of mesa north side of San Juan, +/- 5 miles west of Bluff. Entrada(?) at the base, Summerville(?), Bluff sandstone (Morrison?) San Juan County, Utah. 1928. (Detail of photo no. 538) #1:/Gregory H.E. Collection/ghe00540 ID. Gregory, H.E. 540 Variation in Bluff sandstone (Morrison?) cap and Summerville(?) shale. San Juan County, Utah. 1928. (View nearer that in photo no. 539) #1:/Gregory H.E. Collection/ghe00541 ID. Gregory, H.E. 541 Edge of cliffs 5+ miles west of Bluff looking southeast across San Juan River. Entrada(?), Summerville(?), Bluff sandstone (Morrison?). San Juan County, Utah. 1928. #1:/Gregory H.E. Collection/ghe00542 ID. Gregory, H.E. 542 Details of erosion in Entrada(?) 5+ miles west of Bluff. San Juan County, Utah. 1928. #1:/Gregory H.E. Collection/ghe00543 ID. Gregory, H.E. 543 Bluff sandstone (Morrison?) over shales (Summerville?) in Butler Wash, 7 miles above its mouth. San Juan County, Utah, 1928. #1:/Gregory H.E. Collection/ghe00544 ID. Gregory, H.E. 544 Fishmouth Cave. Eroded in Navajo sandstone on back slope of Comb Ridge. San Juan County, Utah. 1928. Published as plate 23-A in U.S. Geological Survey. Professional paper 188. 1938. #1:/Gregory H.E. Collection/ghe00545 ID. Gregory, H.E. 545 View looking east across Butler Wash 11+ miles above its mouth. Foreground Navajo sandstone forming back of Comb monocline. Distant cliffs, Morrison and Dakota, San Juan County, Utah. 1928. #1:/Gregory H.E. Collection/ghe00546 ID. Gregory, H.E. 546 Entrada(?) about 30 feet above Navajo on back of Comb monocline in tributary to Butler Wash, 11+ miles above its mouth. San Juan County, Utah. 1928. #1:/Gregory H.E. Collection/ghe00547 ID. Gregory, H.E. 547 Supai forming butte on top of Goodridge formation, crest of anticline west of Navajo Springs. San Juan County, Utah. 1928. #1:/Gregory H.E. Collection/ghe00548 ID. Gregory, H.E. 548 Wall of Road Canyon. Halgaito strata (lower part) and shaly phase of Cedar Mesa (upper part). San Juan County, Utah. 1928. Published as plate 11-B in U.S. Geological Survey. Professional paper 188. 1938. #1:/Gregory H.E. Collection/ghe00549 ID. Gregory, H.E. 549 Gravel terrace 130 feet above level of San Juan River to Bluff. Looking southwest across San Juan to wall of Bluff sandstone. San Juan County, Utah. 1928. #1:/Gregory H.E. Collection/ghe00550 ID. Gregory, H.E. 550 Red gypsiferous beds (Surnmerville?) below Bluff sandstone (Morrison?) at Bluff. View looking southwest across San Juan River. San Juan County, Utah. 1928. #1:/Gregory H.E. Collection/ghe00551 ID. Gregory, H.E. 551 Morrison shales 12+ miles south of Blanding. San Juan County, Utah. 1928. #1:/Gregory H.E. Collection/ghe00552 ID. Gregory, H.E. 552 Cliff of Buck Canyon, +/- 4 miles west of Bluff. Bluff sandstone at top. San Juan County, Utah. 1928. #1:/Gregory H.E. Collection/ghe00553 ID. Gregory, H.E. 553 Hoodoos in Entrada(?) base of cliff in Buck Canyon. San Juan County, Utah. 1928. #1:/Gregory H.E. Collection/ghe00554 ID. Gregory, H.E. 554 Contact of Supai (left) and shales occupying the position of the Coconino (right). Southwest of Navajo Springs. Comb Wash and Comb monocline in background (northeast). San Juan County, Utah. 1928. #1:/Gregory H.E. Collection/ghe00555 ID. Gregory, H.E. 555 West face of Comb Ridge looking north along Comb Wash, 2+ miles north of Navajo Springs. San Juan County, Utah. 1928. #1:/Gregory H.E. Collection/ghe00556 ID. Gregory, H.E. 556 Butte of Morrison shale capped by Dakota rising from a floor of Morrison(?) sandstone (Salt Wash?). Near mouth of Recapture Creek. San Juan County, Utah. 1928. #1:/Gregory H.E. Collection/ghe00557 ID. Gregory, H.E. 557 Surface of McCracken Mesa, part of Sage Plain between Recapture and Montezuma creeks. All sage brush, San Juan County, Utah. 1928. #1:/Gregory H.E. Collection/ghe00558 ID. Gregory, H.E. 558 San Juan River 1 mile below mouth of McElmo Creek. Looking upstream toward Aneth, middle distance. Shows part of the abandoned Colorado-Utah road. Morrison strata capped by gravel terrace. San Juan County, Utah. 1928. Published as plate 2-C in U.S. Geological Survey. Professional paper 188. 1938. #1:/Gregory H.E. Collection/ghe00559 ID. Gregory, H.E. 559 Morrison shales with cap of lowest Dakota, Recapture Valley 12+ miles south of Blanding. San Juan County, Utah. 1928. #1:/Gregory H.E. Collection/ghe00560 ID. Gregory, H.E. 560 Erosion forms in Morrison just above heavy Bluff sandstone bed near base. Near mouth of Recapture Creek. San Juan County, Utah. 1928. #1:/Gregory H.E. Collection/ghe00561 ID. Gregory, H.E. 561 Abajo Mountains looking northwest from Blanding-Monticello road. San Juan County, Utah. 1928. #1:/Gregory H.E. Collection/ghe00562 ID. Gregory, H.E. 562 Ripples and sun cracks in upper Moenkopi shale. Southwest face of Elk Ridge. San Juan County, Utah. 1928. #1:/Gregory H.E. Collection/ghe00563 ID. Gregory, H.E. 563 Moenkopi lower shales, middle sandstone, upper shales. Southwest face of Elk Ridge on Blanding road to Natural Bridges. San Juan County, Utah. 1928. #1:/Gregory H.E. Collection/ghe00564 ID. Gregory, H.E. 564 Gooseberry Ranger station on Elk Ridge. San Juan County, Utah. 1928. #1:/Gregory H.E. Collection/ghe00565 ID. Gregory, H.E. 565 ooking into head of Poison Canyon, Coconino, Moenkopi, Shinarump, patches of Chinle. San Juan County, Utah. 1928. #1:/Gregory H.E. Collection/ghe00566 ID. Gregory, H.E. 566 Looking west from Horse Mountain across upper branches of Fable Valley toward Henry Mountains. San Juan County, Utah. 1928. (Panorama with photo no. 567) #1:/Gregory H.E. Collection/ghe00567 ID. Gregory, H.E. 567 Looking N. 60 degrees W. from Horse Mountain across Beef Basin to mouth of Fremont. (Notch on distant skyline) San Juan County, Utah. 1928. (Panorama with photo no. 566) #1:/Gregory H.E. Collection/ghe00568 ID. Gregory, H.E. 568 View looking northeast from Horse Mountain across head of Indian Creek toward La Sal Mountains. San Juan County, Utah. 1928. #1:/Gregory H.E. Collection/ghe00569 ID. Gregory, H.E. 569 Butte of Coconino near junction Beef Basin and Fable Valley. San Juan County, Utah. 1928. #1:/Gregory H.E. Collection/ghe00570 ID. Gregory, H.E. 570 View down Beef Basin Canyon from point near mouth of Fabic Valley; Coconino over Supai. Distant mesa west wall of Colorado River. San Juan County, Utah. 1928. #1:/Gregory H.E. Collection/ghe00571 ID. Gregory, H.E. 571 Lower end of Fable Valley near junction with Beef Basin. Hermosa, Rico, Supai, capped by Coconino (distant buttes). San Juan County, Utah. 1928. #1:/Gregory H.E. Collection/ghe00572 ID. Gregory, H.E. 572 View in Trail Canyon; Coconino on Supai. San Juan County, Utah. 1928. #1:/Gregory H.E. Collection/ghe00573 ID. Gregory, H.E. 573 Trail Canyon. Rocky wall of Coconino. San Juan County, Utah. 1928. #1:/Gregory H.E. Collection/ghe00574 ID. Gregory, H.E. 574 Erosion forms in Entrada sandstone, north branch of Whiskers Creek, looking southeast across Cottonwood Wash, San Juan County, Utah. 1928. #1:/Gregory H.E. Collection/ghe00575 ID. Gregory, H.E. 575 Bluff sandstone (Morrison), Cottonwood Wash, +/- 12 miles above mouth. Cliff houses. San Juan County, Utah. 1928. #1:/Gregory H.E. Collection/ghe00576 ID. Gregory, H.E. 576 Beds (Summerville?) immediately below Bluff sandstone at Bluff. San Juan County, Utah. 1928. #1:/Gregory H.E. Collection/ghe00577 ID. Gregory, H.E. 577 Gravel-topped terrace over lower Morrison strata, 2+ miles below Aneth. San Juan County, Utah. 1929. #1:/Gregory H.E. Collection/ghe00578 ID. Gregory, H.E. 578 Massive sandstone in Morrison in stratigraphic position of Bluff sandstone changes to shale 1/4 mile along strike, 3+ miles above mouth of Montezuma Creek. San Juan County, Utah. 1929. #1:/Gregory H.E. Collection/ghe00579 ID. Gregory, H.E. 579 Morrison(?) strata occupying the position of Bluff sandstone between Aneth and mouth of Montezuma Creek. San Juan County, Utah. 1929. #1:/Gregory H.E. Collection/ghe00580 ID. Gregory, H.E. 580 View looking south across San Juan Valley at Aneth. Morrison strata, distant plateau capped by Dakota. San Juan County, Utah. 1929 #1:/Gregory H.E. Collection/ghe00581 ID. Gregory, H.E. 581 Ruins of Cliff House, Hovenweep National Monument, Montezuma County, Colorado. 1929. Published as plate 8-A in U.S. Geological Survey. Professional paper 188. 1938. #1:/Gregory H.E. Collection/ghe00582 ID. Gregory, H.E. 582 Ruins in Hovenweep National Monument on rim of canyon tributary to McElmo. Country rock is Dakota sandstone. Montezuma County, Colorado. 1929. #1:/Gregory H.E. Collection/ghe00583 ID. Gregory, H.E. 583 Upper bed of Bluff sandstone with shales between it and lower sandstone bed (concealed). North bank San Juan River +/- 5 miles above mouth of Recapture Creek. San Juan County, Utah. 1929. #1:/Gregory H.E. Collection/ghe00584 ID. Gregory, H.E. 584 Shales between upper and lower beds of Bluff sandstone 3+ miles east of mouth of Recapture Creek. San Juan County, Utah. 1929. #1:/Gregory H.E. Collection/ghe00585 ID. Gregory, H.E. 585 Valley fill of sand and clay exposed by recent erosion in Comb Wash. San Juan County, Utah. 1929. Published as plate 20-A in U.S. Geological Survey. Professional paper 188, 1938. #1:/Gregory H.E. Collection/ghe00586 ID. Gregory, H.E. 586 Valley of Butler Creek. View looking north. Subsequent valley developed on the back slope of Comb monocline. Stream occupies narrow canyon cut into the floor. Navajo sandstone overlain by formations of the San Rafael group. Bluff sandstone member of Navajo formation in right distance. San Juan County, Utah, 1929. Published, as plate 18-A in U.S. Geological Survey. Professional paper 188. 1938. #1:/Gregory H.E. Collection/ghe00587 ID. Gregory, H.E. 587 View near mouth of Cottonwood Wash. Summerville(?) formation capped by Bluff sandstone member of Morrison formation. San Juan County, Utah. 1929. Published as plate 14-A in U.S. Geological Survey. Professional paper 188. 1938. #1:/Gregory H.E. Collection/ghe00588 ID. Gregory, H.E. 588 View looking west from south end of Elk Ridge across Armstrong Canyon. Moenkopi beds in foreground, Coconino in middle distance, mesas of Chinle and Glen Canyon beyond. San Juan County, Utah. 1929. #1:/Gregory H.E. Collection/ghe00589 ID. Gregory, H.E. 589 Top of Elk Ridge. View looking northeast from Bears Ears. San Juan County, Utah. 1929. #1:/Gregory H.E. Collection/ghe00590 ID. Gregory, H.E. 590 View of East Bears Ear looking west from top of Elk Ridge. Chinle strata capped by Wingate. San Juan County, Utah. 1929. #1:/Gregory H.E. Collection/ghe00591 ID. Gregory, H.E. 591 Goblet of Venus. Erosion remnant in Entrada sandstone on Blanding-Kigalia road. San Juan County, Utah. 1929. Published as plate 14-b in U.S. Geological Survey. Professional paper 188. 1938. #1:/Gregory H.E. Collection/ghe00592 ID. Gregory, H.E. 592 Dike 30 miles northeast of Winslow. Navajo County, Arizona. 1911. #1:/Gregory H.E. Collection/ghe00593 ID. Gregory, H.E. 593 Dike of diabase, Coyote Wash, +/- 30 miles north of Winslow. Navajo County, Arizona. 1911. #1:/Gregory H.E. Collection/ghe00594 ID. Gregory, H.E. 594 Chimney Butte, volcanic neck, +/-25 miles northeast of Winslow Navajo County, Arizona. 1911. Hopi Buttes Volcanic field. #1:/Gregory H.E. Collection/ghe00595 ID. Gregory, H.E. 595 Lava-capped butte, 3+ miles west of Stiles Ranch. Navajo County, Arizona. 1911 #1:/Gregory H.E. Collection/ghe00596 ID. Gregory, H.E. 596 Twin Buttes and dike 6+ miles south of Bidahochi. Navajo County, Arizona. 1911. #1:/Gregory H.E. Collection/ghe00597 ID. Gregory, H.E. 597 Face of mesa composed of volcanic tuff associated with Twin Buttes, 6+. miles south of Bidahochi. Navajo County, Arizona. 1911. #1:/Gregory H.E. Collection/ghe00598 ID. Gregory, H.E. 598 Lava-capped butte northwest of Cedar Springs. Navajo County, Arizona. 1911. #1:/Gregory H.E. Collection/ghe00599 ID. Gregory, H.E. 599 Mesa Verde sandstone on Mancos shale near Jaditu Springs. Navajo County, Arizona. 1911. #1:/Gregory H.E. Collection/ghe00600 ID. Gregory, H.E. 600 West face of Chuska Mountains near Lukachukai. Rincons and blind windows developed in massive sandstone; Chinle formation in foreground, Tertiary sediments in background. The view includes a vertical distance of 1,800 feet. Apache County, Arizona, n.d. Published as plate 26-C in U.S. Geological Survey. Professional paper 93. 1917. #1:/Gregory H.E. Collection/ghe00601 ID. Gregory, H.E. 601 Todilto(?) limestone +/- 5 miles east of Baca flag station on Santa Fe Railroad. New Mexico. 1928. #1:/Thorpe M.R. Collection/ghe00602 ID. Gregory, H.E. 602 Extreme head of Gold Queen Gulch. Abajo Peak on the right. Slope composed of blue porphyry talus. Abajo Mountains. San Juan County, Utah. 1915. (Photo by M.R. Thorpe) #1:/Thorpe M.R. Collection/ghe00604 ID. Gregory, H.E. 604 Head of Indian Creek, looking west. Mt. Linnaeus (West Mountain) in left distance. Abajo Mountains. San Juan County, Utah. 1915. (Photo by M.R. Thorpe) #1:/Thorpe M.R. Collection/ghe00605 ID. Gregory, H.E. 605 South side of Horsehead Peak, showing slide rock masses of porphyry. Abajo Mountains. San Juan County, Utah. 1915. (Photo by M.R. Thorpe) #1:/Thorpe M.R. Collection/ghe00606 ID. Gregory, H.E. 606 Jackson Divide and Mt. Linnaeus (West Peak) looking west, Abajo Mountains. San Juan County, Utah. 1915. (Photo by M.R. Thorpe) #1:/Thorpe M.R. Collection/ghe00607 ID. Gregory, H.E. 607 Divide between West and Shay Mountains. West side of Indian Creek, Abajo Mountains. San Juan County, Utah. 1915 (Photo by M.R. Thorpe) #1:/Thorpe M.R. Collection/ghe00608 ID. Gregory, H.E. 608 Lake on flank of Abajo Mountains between Johnson and Recapture Creeks. Depression in sheet of intrusive rock. San Juan County, Utah. 1915. (Photo by M.R. Thorpe). Published as plate 2-B in U.S. Geological Survey. Professional paper 188. 1938. #1:/Gregory H.E. Collection/ghe00609 ID. Gregory, H.E. 609 Head of North Canyon, showing sharp differentiation of vegetation. Abajo Mountains. San Juan County, Utah. 1915. (Photo by M.R. Thorpe) #1:/Gregory H.E. Collection-Dream Mine/ghe00610 ID. Gregory, H.E. 610 Tunnel House, Dream Mine, Johnson Creek. Shown is S.J. Houser, owner. Abajo Mountains. San Juan County, Utah. 1915 #1:/Thorpe M.R. Collection/ghe00611 ID. Gregory, H.E. 611 Dakota cliff, east wall of Bulldog Canyon. Abajo Mountains. San Juan County, Utah. 1915. (Photo by M.R. Thorpe) #1:/Thorpe M.R. Collection/ghe00612 ID. Gregory, H.E. 612 Contact between Mancos shale and igneous rock, at head of Harts Draw, Abajo Mountains. San Juan County, Utah. 1915 (Photo by M.R. Thorpe) #1:/Thorpe M.R. Collection/ghe00613 ID. Gregory, H.E. 613 Forested north slope of Jackson Divide. Abajo Mountains. San Juan County, Utah. 1915. (Photo by M.R. Thorpe) #1:/Thorpe M.R. Collection/ghe00614 ID. Gregory, H.E. 614 South slope of Jackson Divide. (All south slopes are barren or grassed; all north ones are forested). Abajo Mountains. San Juan County, Utah. 1915. (Photo by M.R. Thorpe) #1:/Thorpe M.R. Collection/ghe00615 ID. Gregory, H.E. 615 Upper La Plata sandstone (light-colored), Johnson Creek. Abajo Mountains. San Juan County, Utah. 1915. (Photo by M.R. Thorpe) #1:/Thorpe M.R. Collection/ghe00616 ID. Gregory, H.E. 616 Upturned Dakota sandstone, Johnson Creek. Abajo Mountains. San Juan County, Utah. 1915. (Photo by M.R. Thorpe) #1:/Thorpe M.R. Collection/ghe00617 ID. Gregory, H.E. 617 Dakota sandstone (detail), Johnson Creek, near stamp mill. Abajo Mountains, San Juan County, Utah. 1915. (Photo by M.R. Thorpe) #1:/Thorpe M.R. Collection/ghe00618 ID. Gregory, H.E. 618 Head of Johnson Creek, Abajo Mountains. San Juan County, Utah. 1915. (Photo by M.R. Thorpe) #1:/Thorpe M.R. Collection/ghe00619 ID. Gregory, H.E. 619 Talus slope on igneous rock in Abajo Mountains. San Juan County, Utah. 1915. (Photo by M.R. Thorpe). Published as plate 18-B in U.S. Geological Survey. Professional paper 188. 1938. #1:/Thorpe M.R. Collection/ghe00620 ID. Gregory, H.E. 620 West Mountain, from Twin Peaks, looking west. Abajo Mountains. San Juan County, Utah. 1915. (Photo by M.R. Thorpe) #1:/Thorpe M.R. Collection/ghe00621 ID. Gregory, H.E. 621 Head of Indian Creek, looking east. Abajo Peak in distance. Abajo Mountains. San Juan County, Utah. 1915. (Photo by M.R. Thorpe) #1:/Thorpe M.R. Collection/ghe00622 ID. Gregory, H.E. 622 South Mountain (right), from West Peak, looking across head of Johnson Creek. Abajo Mountains. San Juan County, Utah. 1915. (Photo by M.R. Thorpe) #1:/Thorpe M.R. Collection/ghe00623 ID. Gregory, H.E. 623 South Mountain, from the west. Abajo Mountains. San Juan County, Utah. 1915. (Photo by M.R. Thorpe) #1:/Thorpe M.R. Collection-Gold Queen Mine/ghe00624 ID. Gregory, H.E. 624 Gold Queen mill and cabins, Gold Queen Mine. Gold Queen Gulch, Abajo Mountains. San Juan County, Utah. 1915. (Photo by M.R. Thorpe) #1:/Thorpe M.R. Collection/ghe00625 ID. Gregory, H.E. 625 Head of Gold Queen Gulch. Blue Mountain tunnel in foreground. Abajo Mountains. San Juan County, Utah. 1915. (Photo by M.R. Thorpe) #1:/Thorpe M.R. Collection/ghe00626 ID. Gregory, H.E. 626 Looking toward head of Gold Queen Gulch. Abajo Mountains. San Juan County, Utah. 1915. (Photo by M.R. Thorpe) #1:/Thorpe M.R. Collection/ghe00627 ID. Gregory, H.E. 627 Metamorphosed Mancos shale, Gold Queen Gulch. Abajo Mountains. San Juan County, Utah. 1915. (Photo by M.R. Thorpe) #1:/Thorpe M.R. Collection/ghe00628 ID. Gregory, H.E. 628 Dakota hogback, first south of Pole Creek, leading up to Abajo Peak. Holmes and party rode up this ridge in 1873. Abajo Mountains. San Juan County, Utah. 1915. (Photo by M.R. Thorpe) #1:/Thorpe M.R. Collection/ghe00629 ID. Gregory, H.E. 629 Upturned Dakota sandstone. First ridge south of Pole Creek, at the base of Abajo Peak. Dip 41 degrees E. Abajo Mountains. San Juan County, Utah. 1915. (Photo by M.R. Thorpe) #1:/Thorpe M.R. Collection/ghe00630 ID. Gregory, H.E. 630 Septarium from the Dakota sandstone, common in this area, Abajo Mountains. San Juan County, Utah. 1915 #1:/Thorpe M.R. Collection/ghe00631 ID. Gregory, H.E. 631 Cottonwood Canyon, Beef Basin and North Elks, looking west from West Mountain. Abajo Mountains, San Juan County, Utah. 1915. (Photo by M.R. Thorpe) #1:/Thorpe M.R. Collection/ghe00632 ID. Gregory, H.E. 632 "The Washboard," head of North Canyon, looking west. Erosion caused by sheep grazing, Abajo Mountain. San Juan County, Utah. 1915. (Photo by M.R. Thorpe) #1:/Thorpe M.R. Collection/ghe00633 ID. Gregory, H.E. 633 Abandoned ten-stamp mill, Johnson Creek. Abajo Mountains. San Juan County, Utah. 1915. (Photo by M.R. Thorpe) #1:/Thorpe M.R. Collection/ghe00634 ID. Gregory, H.E. 634 Roberson Pasture and Beef Basin, looking west. Abajo Mountains. San Juan County, Utah. 1915. (Photo by M.R. Thorpe). #1:/Thorpe M.R. Collection/ghe00635 ID. Gregory, H.E. 635 Contact between Mancos shale and igneous rock, head of Harts Draw Wash, Abajo Mountains. San Juan County, Utah. 1915. (Photo by M.R. Thorpe). #1:/Thorpe M.R. Collection/ghe00636 ID. Gregory, H.E. 636 North Elk Ridge in background, divide between Shay and West Mountains, in middle ground, and Roberson Pasture in foreground. Abajo Mountains. San Juan County, Utah.1915 (Photo by M.R. Thorpe). #1:/Thorpe M.R. Collection/ghe00637 ID. Gregory, H.E. 637 West slope of Horsehead Peak, Abajo Mountains. San Juan County, Utah. 1915. (Photo by M.R. Thorpe). #1:/Thorpe M.R. Collection/ghe00640 ID. Gregory, H.E. 640 Near Dandy Crossing, looking east across Colorado River. San Juan County, Utah. 1913. (Photo by M.R. Thorpe). Published as plate 7-B in U.S. Geological Survey. Professional paper 188. 1938. #1:/Thorpe M.R. Collection/ghe00641 ID. Gregory, H.E. 641 Face of cliffs about 2 miles north of Clay Hills Crossing (San Juan River). Lower and middle parts of "Moenkopi" above Coconino. San Juan County, Utah. 1930. #1:/Gregory H.E. Collection/ghe00642 ID. Gregory, H.E. 642 Face of cliffs about 3 miles north of Clay Hills Crossing (San Juan River). Middle and upper "Moenkopi". Chinle and Wingate in background. Chinle material forms slide. San Juan County, Utah. 1930. Published as plate 9-B in U.S. Geological Survey. Professional paper 188. 1938. #1:/Gregory H.E. Collection/ghe00644 ID. Gregory, H.E. 644 Spring in desert flat at Red House, head of Red Canyon where by recession of cliffs the floor of Rec Canyon is nearly on a level with Grand Flats. San Juan County, Utah. 1930. #1:/Gregory H.E. Collection/ghe00645 ID. Gregory, H.E. 645 Montezuma Canyon at mouth of Verdure Creek, Morrison resting on Bluff sandstone, Dakota in left background. San Juan County, Utah. 1930. #1:/Gregory H.E. Collection/ghe00646 ID. Gregory, H.E. 646 Bank of Paria River about 5 miles below Cannonville. Navajo sandstone, Carmel formation, and sandstone above (perhaps Entrada). Kane County, Utah, 1930 #1:/Gregory H.E. Collection/ghe00647 ID. Gregory, H.E. 647 Wall of Kanab Canyon, Wingate and Todilto. Kane County, Utah. 1930. #1:/Gregory H.E. Collection/ghe00648 ID. Gregory, H.E. 648 Wall of branch of Kanab Canyon. Wingate, Todilto, fragment of Navajo. Kane County, Utah. 1930. #1:/Gregory H.E. Collection/ghe00649 ID. Gregory, H.E. 649 Wingate sandstone, Kanab Canyon. Kane County, Utah. 1930. #1:/Gregory H.E. Collection/ghe00650 ID. Gregory, H.E. 650 Basalt wall of East Fork of Virgin River above Glendale. Lava that filled the ancient canyon has been trenched. Kane County, Utah. 1930. #1:/Gregory H.E. Collection/ghe00651 ID. Gregory, H.E. 651 Upper wall of Big Meadow Canyon (on Zion-Mt. Carmel road). Morrison strata unconsolidated Dakota? (black band), and coal-bearing Cretaceous. Kane County, Utah 1930 #1:/Gregory H.E. Collection/ghe00652 ID. Gregory, H.E. 652 Big Meadow Canyon. Carmel formation. Kane County, Utah. 1930. #1:/Gregory H.E. Collection/ghe00653 ID. Gregory, H.E. 653 Big Meadow Canyon (on Zion-Mt. Carmel road). Morrison, unconstructed Dakota. Kane County, Utah. 1930 #1:/Gregory H.E. Collection/ghe00654 ID. Gregory, H.E. 654 Part of Chinle formation just above variegated shales in wall of Virgin River Canyon, Springdale Washington County, Utah. 1930. #1:/Gregory H.E. Collection/ghe00655 ID. Gregory, H.E. 655 View on Zion-Mt. Carmel road. Navajo sandstone capped with sandstone member just below Carmel formation. Kane County, Utah. 1930. #1:/Gregory H.E. Collection/ghe00656 ID. Gregory, H.E. 656 Perched potholes on small tributary to Virgin River along Zion-Mt, Carmel road. Some of these and many others are above the reach of present stream flow. Kane County, Utah. 1930. #1:/Gregory H.E. Collection/ghe00657 ID. Gregory, H.E. 657 Cross bedding in Navajo sandstone along Zion-Mt. Carmel road. Kane County, Utah. 1930. #1:/Gregory H.E. Collection/ghe00658 ID. Gregory, H.E. 658 Faults in Navajo sandstone along Zion-Mt. Carmel road. Kane County, Utah. 1930. #1:/Gregory H.E. Collection/ghe00659 ID. Gregory, H.E. 659 Navajo sandstone stained with copper, along Zion-Mt. Carmel road. Kane County, Utah. 1930. #1:/Gregory H.E. Collection/ghe00660 ID. Gregory, H.E. 660 East Temple Zion Canyon sandstone cap on Navajo. Washington County, Utah. 1930. #1:/Gregory H.E. Collection/ghe00661 ID. Gregory, H.E. 661 Facetted pebbles on bare rock surfaces between dunes; facetting perhaps produced by dragging back and forth over sandstone in response to strong local, ephemeral stream wash. Between Tuba and Red Lake. Coconino County, Arizona. 1930 #1:/Gregory H.E. Collection/ghe00662 ID. Gregory, H.E. 662 Facetted pebbles on bare rock surfaces between dunes; facetting perhaps produced by dragging back and forth over sandstone in response to strong local, ephemeral stream wash. Between Tuba and Red Lake. Coconino County, Arizona 1930 #1:/Gregory H.E. Collection/ghe00663 ID. Gregory, H.E. 663 Facetted pebbles on bare rock surfaces between dunes; facetting perhaps produced by dragging back and forth over sandstone in response to strong local, ephemeral stream wash. Between Tuba and Red Lake. Coconino County, Arizona. 1930. #1:/Gregory H.E. Collection/ghe00664 ID. Gregory, H.E. 664 Hurrican Cliffs looking north from "Toquerville Gap" along line of fault. Kaibab limestone on right; Moenkopi formation (Shnabkaib member) upturned in left foreground. Washington County, Utah. n.d. #1:/Gregory H.E. Collection/ghe00665 ID. Gregory, H.E. 665 Moenkopi strata on limb of anticline looking north. La Verkin Creek. Washington County, Utah. 1931. #1:/Gregory H.E. Collection/ghe00666 ID. Gregory, H.E. 666 Buttes of Cretaceous sandstone including fossil wood, bones of turtles, and dinosaurs (?) near head of Sheep Creek. Kane County, Utah. 1931. #1:/Gregory H.E. Collection/ghe00667 ID. Gregory, H.E. 667 Camp in floor of ancient lake bed; mesa of Navajo sandstone in background. Kitchen Ranch. Kane County, Utah. 1931. #1:/Gregory H.E. Collection/ghe00668 ID. Gregory, H.E. 668 White Cone (Mollie's Nipple), a butte of Navajo sandstone in the background, and ancient lake bed in the foreground. Kitchen Canyon. Kane County, Utah. 1931. #1:/Gregory H.E. Collection/ghe00669 ID. Gregory, H.E. 669 White Cone; Navajo sandstone capped by iron concretions and coated with talus. Kitchen Canyon. Kane County, Utah. 1931. #1:/Gregory H.E. Collection/ghe00670 ID. Gregory, H.E. 670 Wall of Wingate with Todilto (?) above. Paria Valley, near mouth of Kitchen Canyon. Kane County, Utah. 1931. #1:/Gregory H.E. Collection/ghe00671 ID. Gregory, H.E. 671 Paria River Valley above "the box" 3 miles below Cannonville. At the left the lowest bed is massive sandstone separated from Navajo sandstone by shales and limestone. Kane County, Utah. 1931. #1:/Gregory H.E. Collection/ghe00672 ID. Gregory, H.E. 672 Wingate sandstone overlain unconformably by Todilto (?). Johnson Canyon. Kane County, Utah. 1931 #1:/Gregory H.E. Collection/ghe00673 ID. Gregory, H.E. 673 Volcano in Kanab Valley 6 miles below Alton. Kane County, Utah. 1931 #1:/Gregory H.E. Collection/ghe00674 ID. Gregory, H.E. 674 Volcano near head of Johnson Canyon, rim of Paunsagunt Plateau in background. Kane County, Utah. 1931 #1:/Gregory H.E. Collection/ghe00675 ID. Gregory, H.E. 675 Pot holes perched 12 feet above flood stage of Clear Creek. Zion-Mt. Carmel Highway. Kane County, Utah. 1931. Published as figure 129 in U.S. Geological Survey. Professional paper 220. 1950. #1:/Gregory H.E. Collection/ghe00676 ID. Gregory, H.E. 676 Pot holes in ephemeral stream bed cut in Navajo sandstone. Zion-Mt. Carmel Highway Kane County, Utah. 1931 #1:/Gregory H.E. Collection/ghe00677 ID. Gregory, H.E. 677 Butte eroded from Navajo sandstone, capped by iron concretions. Zion-Mt. Carmel Highway. Kane County, Utah. 1931. #1:/Gregory H.E. Collection/ghe00678 ID. Gregory, H.E. 678 1, Navajo sandstone (at base); 2, shales; 3, sandstone bed that forms "entablatures" on "Temples" of Zion National Park; 4 Carmel and above. Zion-Mt. Carmel Highway, Kane County, Utah. 1931. #1:/Gregory H.E. Collection/ghe00679 ID. Gregory, H.E. 679 Cross bedding in Navajo sandstone. Zion-Mt. Carmel Highway, Kane County, Utah. 1931. Published as figure 48-B in U. S Geological Survey. Professional paper 220. 1950. #1:/Gregory H.E. Collection/ghe00680 ID. Gregory, H.E. 680 Cross bedding in Navajo sandstone. Zion-Mt. Carmel Highway, Kane County, Utah. 1931. #1:/Gregory H.E. Collection/ghe00681 ID. Gregory, H.E. 681 Cross bedding in Navajo sandstone. Zion-Mt. Carmel highway, Kane County, Utah. 1931. Published as figure 48-C in U.S. Geological Survey. Professional paper 220. 1950. #1:/Gregory H.E. Collection/ghe00682 ID. Gregory, H.E. 682 Cross bedding in Navajo sandstone. Zion-Mt. Carmel Highway, Kane County, Utah. 1931. #1:/Gregory H.E. Collection/ghe00683 ID. Gregory, H.E. 683 Cross bedding in Navajo sandstone. Zion-Mt. Carmel Highway, Kane County, Utah. 1931. #1:/Gregory H.E. Collection/ghe00684 ID. Gregory, H.E. 684 Cross bedding in Navajo sandstone. Zion-Mt. Carmel Highway, Kane County, Utah. 1931. #1:/Gregory H.E. Collection/ghe00685 ID. Gregory, H.E. 685 Cross bedding in Navajo sandstone. Zion-Mt. Carmel Highway, Kane County, Utah. 1931. #1:/Gregory H.E. Collection/ghe00686 ID. Gregory, H.E. 686 Chinle formation near Clarks Ranch 10 miles east of Johnson Canyon. Kane County, Utah. 1931 #1:/Gregory H.E. Collection/ghe00687 ID. Gregory, H.E. 687 Chinle formation at "Petrified Forest" near "Sixteen Mile Spring". Kane County, Utah. 1931 #1:/Gregory H.E. Collection/ghe00688 ID. Gregory, H.E. 688 Vegetation top of Elk Ridge near Kigalia Ranger Station. San Juan County, Utah. 1932. #1:/Gregory H.E. Collection/ghe00689 ID. Gregory, H.E. 689 Vegetation top of Elk Ridge near Kigalia Ranger Station. San Juan County, Utah. 1932. #1:/Gregory H.E. Collection/ghe00690 ID. Gregory, H.E. 690 Rico (at base), Cutler,(Halgaito) Kachina formation Johns Canyon. San Juan County, Utah. 1932. #1:/Gregory H.E. Collection/ghe00691 ID. Gregory, H.E. 691 Summerville (?) capped by Bluff sandstone (Morrison) near mouth of Cottonwood Canyon, San Juan County, Utah. 1932. #1:/Gregory H.E. Collection/ghe00692 ID. Gregory, H.E. 692 Bluff sandstone surrounded by alluvial terraces by recent down cutting. Cottonwood Wash in foreground. Diecker Ranch. San Juan County, Utah. 1932 #1:/Gregory H.E. Collection/ghe00693 ID. Gregory, H.E. 693 Brushy Basin member of Morrison formation, Brushy Basin. San Juan County, Utah. 1932. Published as plate 14-C in U.S. Geological Survey. Professional paper 188. 1938. #1:/Gregory H.E. Collection/ghe00694 ID. Gregory, H.E. 694 Brushy Basin member of Morrison formationt Brushy Basin, capped by sandstone layer. San Juan County, Utah. 1932. #1:/Gregory H.E. Collection/ghe00695 ID. Gregory, H.E. 695 Summerville (?) formation at contact with Bluff sandstone (Morrison). Cottonwood Canyon below mouth of Allen Canyon. San Juan County, Utah. 1932. #1:/Gregory H.E. Collection/ghe00696 ID. Gregory, H.E. 696 Floor of White Canyon and tributaries looking northeast from point near Owochorao natural bridge. "Kachinat" (Cedar Mesa) sandstone (foreground), "Frey" (Organ Rock) (first mesas), Moenkopi, Shinarump and Wingate (background). San Juan County, Utah. 1932. #1:/Gregory H.E. Collection/ghe00697 ID. Gregory, H.E. 697 "Kachina" (Cedar Mesa) sandstone White Canyon. Sipapu natural bridge at left bottom. San Juan County, Utah. 1932. Published as plate 23-B in U.S. Geological Survey. Professional paper 188. 1938. #1:/Gregory H.E. Collection/ghe00698 ID. Gregory, H.E. 698 "Kachina" (Cedar Mesa) sandstone trenched 400 feet by White Canyon just above Sipapu natural bridge. San Juan County, Utah. 1932. #1:/Gregory H.E. Collection/ghe00699 ID. Gregory, H.E. 699 Floor of White Canyon near Rock Springs. "Kachina" (Cedar Mesa) sandstone (at base), "Frey" (Organ Rock), Moenkopi (remnants at top). San Juan County, Utah. 1932. #1:/Gregory H.E. Collection/ghe00700 ID. Gregory, H.E. 700 View looking northwest across inner canyon of White Canyon between Rock Springs and Soldiers Crossing, "Kachina" (Cedar Mesa) sandstone forms floor of the outer canyon which is bordered by walls of "Frey" (Organ Rock) De Chelly, Moenkopi, Shinarump, Chinle, and Wingate (butte at top). San Juan County, Utah. 1932. Published as plate 6-A in U.S. Geological Survey. Professional paper 188. 1938 #1:/Gregory H.E. Collection/ghe00701 ID. Gregory, H.E. 701 View looking north across White Canyon 2 miles below Soldiers Crossing, "Kachina" (Cedar Mesa) and higher formations. Jacobs Chair (Wingate sandstone) in distance. San Juan County, Utah. 1932. #1:/Gregory H.E. Collection/ghe00702 ID. Gregory, H.E. 702 Contact De Chelly and Moenkopi formations at Rasp Trail, lower White Canyon. San Juan County, Utah. 1932. Published as plate 12-C in U.S. Geological Survey. Professional paper 188. 1938. #1:/Gregory H.E. Collection/ghe00703 ID. Gregory, H.E. 703 Contact of "Frey" (Organ Rock) and De Chelly formation south side White Canyon below Star Springs, San Juan County, Utah. 1932. Published as plate 12-A in U.S. Geological Survey. Professional paper 188. 1938. #1:/Gregory H.E. Collection/ghe00704 ID. Gregory, H.E. 704 Chinle, Wingate and Todilto ? (Kayenta) between White and Red Canyons near their mouths. San Juan County, Utah. 1932. Published as plate 13-A in U.S. Geological Survey. Professional paper 188. 1938. #1:/Gregory H.E. Collection/ghe00705 ID. Gregory, H.E. 705 "Frey" (Organ Rock) formation capped by De Chelly conglomerate 3 miles from mouth of White Canyon. Chinle and Wingate at left. San Juan County, Utah. 1932. #1:/Gregory H.E. Collection/ghe00706 ID. Gregory, H.E. 706 Pillar of "Frey" (Organ Rock) formation capped by talus block of De Chelly conglomerate, White Canyon. San Juan County, Utah. 1932. #1:/Gregory H.E. Collection/ghe00707 ID. Gregory, H.E. 707 View looking across Colorado River at mouth of White Canyon. Trees mark location of the abandoned settlement of Hite. "Frey" (Organ Rock) strata at river's edge: Navajo sandstone at left top Henry Mountains in middle distance. San Juan County, Utah. 1932. #1:/Gregory H.E. Collection/ghe00708 ID. Gregory, H.E. 708 Bluff sandstone (Morrison) 3 miles west of Bluff. San Juan County, Utah. 1932. #1:/Gregory H.E. Collection/ghe00709 ID. Gregory, H.E. 709 Cross-bedded Wingate sandstone, Johnson Canyon, Kane County, Utah. 1932. #1:/Gregory H.E. Collection/ghe00710 ID. Gregory, H.E. 710 Contact of Jurassic and Cretaceous formations on branch of Henrieville Creek. Winsor formation (base), Dakota? sandstone. Garfield County, Utah. 1932. Published as figure 16 in U.S. Geological Survey. Professional paper 226. 1951. #1:/Gregory H.E. Collection/ghe00712 ID. Gregory, H.E. 712 Contact Entrada? bottom and Summerville? Paria River 6 miles south of Cannonville. Garfield County, Utah. 1932. #1:/Gregory H.E. Collection/ghe00713 ID. Gregory, H.E. 713 Perched pot holes in Navajo sandstone, Pine Creek Zion National Park, Utah. 1932. #1:/Zion National Park/ghe00714 ID. Gregory, H.E. 714 Zion National Park, Utah. Pot holes at a "dry waterfall" in the bed of Clear Creek. The deepest of the eight holes is 7 feet. 1932. Figure 127, U.S. Geological Survey Professional Paper 220. #1:/Gregory H.E. Collection/ghe00715 ID. Gregory, H.E. 715 Perched pot holes in Navajo sandstone, Pine Creek, Zion National Park, Utah. 1932. #1:/Gregory H.E. Collection/ghe00716 ID. Gregory, H.E. 716 Perched pot holes in Navajo sandstone, Pine Creek, Zion National Park, Utah. 1932. #1:/Gregory H.E. Collection/ghe00720 ID. Gregory, H.E. 720 View looking east across Parunuweap Valley near Mt. Carmel. Distance Elkheart Cliffs (Navajo capped by Carmel) on upthrown side of Sevier fault; middle distance erosion surface in Carmel and other Jurassic. Kane County, Utah. 1934. #1:/Gregory H.E. Collection/ghe00721 ID. Gregory, H.E. 721 Sevier fault in small gulch 2 miles east of Mt. Carmel Junction. Navajo sandstone in right foreground (east), Carmel strata in left background. Kane County, Utah. 1934. #1:/Gregory H.E. Collection/ghe00722 ID. Gregory, H.E. 722 Consolidated Pleistocene? Valley fill, gulch east of Mt. Carmen Junction. View taken standing on Carmel limestone. Kane County, Utah. 1934. #1:/Gregory H.E. Collection/ghe00723 ID. Gregory, H.E. 723 Straight Cliffs, sandstone Cretaceous above Tropic shale. Orderville, Kane County, Utah. 1934. #1:/Gregory H.E. Collection/ghe00724 ID. Gregory, H.E. 724 Tropic shale Muddy Brook Valley west of Orderville. Kane County, Utah. 1934. #1:/Gregory H.E. Collection/ghe00725 ID. Gregory, H.E. 725 Elkheart Cliffs along highway about mile north of Orderville. Background and right foreground Navajo sandstone capped by Carmel formation. Left foreground slice of cliff dropped down along Sevier fault. Kane County, Utah. 1934 #1:/Gregory H.E. Collection/ghe00726 ID. Gregory, H.E. 726 Exposure of weathered basalt in flow from isolated cone near "Corrals", upper Kanab Valley, pinon and juniper. Kane County, Utah. 1934 #1:/Gregory H.E. Collection/ghe00727 ID. Gregory, H.E. 727 Basalt cone near "Corrals", upper Kanab Valley. Kane County, Utah. 1934 #1:/Gregory H.E. Collection/ghe00728 ID. Gregory, H.E. 728 Carmel limestone at falls in upper Kanab Valley. Kane County, Utah. 1934. #1:/Gregory H.E. Collection/ghe00729 ID. Gregory, H.E. 729 View at falls, upper Kanab Valley near "Corrals". At left, Carmel limestone over which present stream falls; right valley fill in former valley. Kane County, Utah. 1934 #1:/Gregory H.E. Collection/ghe00730 ID. Gregory, H.E. 730 Carmel limestone wall of Kanab Canyon. Kane County, Utah. 1934. #1:/Gregory H.E. Collection/ghe00731 ID. Gregory, H.E. 731 Head of Slide Canyon. Background Wasatch cap of Paunsaugunt Plateau, middle Cretaceous beds, right basalt of Black Knoll volcano. Kane County, Utah. 1934 #1:/Gregory H.E. Collection/ghe00732 ID. Gregory, H.E. 732 Cretaceous (above Tropic shale) capped by Wasatch of Paunsaugunt Plateau near head of Deer Springs Canyon. Kane County, Utah. 1934 #1:/Gregory H.E. Collection/ghe00733 ID. Gregory, H.E. 733 View looking west from Black Knoll across valley, tributary to Johnson Creek, Black Knob volcano in left middle distance, topography typical of Cretaceous and top most Jurassic beds of Skutumpah Terrace. Kane County, Utah. 1934 #1:/Gregory H.E. Collection/ghe00734 ID. Gregory, H.E. 734 Contact of Cretaceous and Wasatch, head of Mill Creek, Kane County, Utah. 1934. Published as figure 20 in U.S. Geological Survey. Professional paper 226. 1951 #1:/Gregory H.E. Collection/ghe00736 ID. Gregory, H.E. 736 Foot of lake in Swallow Park, entrance to "Corral Canyon". Navajo sandstone. Kane County, Utah. 1934 #1:/Gregory H.E. Collection/ghe00737 ID. Gregory, H.E. 737 Alluvium wall of Deer Range Wash, developed since 1886. Kane County, Utah. 1934. #1:/Gregory H.E. Collection/ghe00738 ID. Gregory, H.E. 738 Beveled erosion surface above alluvium flat into which is cut Deer Range Wash. Kane County, Utah. 1934 #1:/Gregory H.E. Collection/ghe00739 ID. Gregory, H.E. 739 Valley in gypsum beds of topmost Jurassic, stream enters canyon in White Cliffs, Navajo in background. Kane County, Utah. 1934. Published as figure 59 in U.S. Geological Survey. Professional paper 226. 1951 #1:/Gregory H.E. Collection/ghe00740 ID. Gregory, H.E. 740 Wingate sandstone, upper Kaibab Gulch. Kane County, Utah. 1934. #1:/Gregory H.E. Collection/ghe00741 ID. Gregory, H.E. 741 Wingate sandstone on an unusual form of Chinle, branch of Johnson Canyon. Kane County, Utah. 1934. #1:/Gregory H.E. Collection/ghe00742 ID. Gregory, H.E. 742 Surface of Panuaungunt Plateau developed in Wasatch limestone near head of Red Canyon looking west to highlands along Sevier fault. Garfield County, Utah. 1934. #1:/Gregory H.E. Collection/ghe00743 ID. Gregory, H.E. 743 Paunsaugunt Plateau developed in Wasatch limestone, near head of Red Canyon looking north toward volcanic mesas. Garfield County, Utah. 1934 #1:/Gregory H.E. Collection/ghe00744 ID. Gregory, H.E. 744 Shonesburg Gulch, branch of Parunuweap Canyon, Line. Fold trail, Rockville to Mt. Carmel. Navajo sandstone underlaid by Kyenta and Chinle. Washington County, Utah. 1935. #1:/Gregory H.E. Collection/ghe00745 ID. Gregory, H.E. 745 Jurassic beds above Navajo sandstone, Harris Mountain northeast of Cane Springs. Fossiliferous Carmel middle distance. Kane County, Utah. 1934 #1:/Gregory H.E. Collection/ghe00746 ID. Gregory, H.E. 746 Capitol Reef Wash, cut in Navajo sandstone. Wayne County, Utah. 1935. #1:/Gregory H.E. Collection/ghe00747 ID. Gregory, H.E. 747 Lower part of wall of "Grand Gulch" Moenkopi, Chinle and Wingate strata. Wayne County, Utah. 1935. #1:/Gregory H.E. Collection/ghe00748 ID. Gregory, H.E. 748 Mounds developed in Cretaceous (Tropic shale?) east of Noturn Ranch. Wayne County, Utah. 1935 #1:/Gregory H.E. Collection/ghe00749 ID. Gregory, H.E. 749 Moenkopi capped by Shinarump. Coalpits volcano in distance. Virgin River in foreground. Rockville, Washington County, Utah. 1936. #1:/Gregory H.E. Collection/ghe00750 ID. Gregory, H.E. 750 Cutting of alluvial fill, Kanab Canyon, above mouth of Caves Lake Canyon, Wingate, Kayenta. Navajo at right. Kane County, Utah. 1936. #1:/Gregory H.E. Collection/ghe00751 ID. Gregory, H.E. 751 Wingate sandstone. Three Lakes Canyon, Kane County, Utah. 1936. #1:/Gregory H.E. Collection/ghe00752 ID. Gregory, H.E. 752 Wingate sandstone overlaid by Kayenta formation, Cave Lakes Canyon, Kane County, Utah. 1936 #1:/Gregory H.E. Collection/ghe00753 ID. Gregory, H.E. 753 Wingate sandstone, Johnson Canyon, Kane County, Utah. 1936. Published as figure 42 in U.S. Geological Survey. Professional paper 220. 1950 #1:/Gregory H.E. Collection/ghe00754 ID. Gregory, H.E. 754 "Marls" in Chinle formation, Springdale, Washington County, Utah. 1936. Published as figure 38 in U.S. Geological Survey. Professional paper 220. 1950. #1:/Gregory H.E. Collection/ghe00755 ID. Gregory, H.E. 755 "Marls" in Chinle formation. Above them the Springdale member of Chinle. Springdale, Washington County, Utah. 1936 #1:/Gregory H.E. Collection/ghe00756 ID. Gregory, H.E. 756 Upper part of Chinle formation. "Marls" in foreground. Near Kanab, Kane County, Utah. 1936. #1:/Gregory H.E. Collection/ghe00757 ID. Gregory, H.E. 757 Mesas of Moenkopi capped by Shinarump. Virgin River looking downstream at Rockville, Washington County, Utah. 1936. #1:/Gregory H.E. Collection/ghe00758 ID. Gregory, H.E. 758 Looking north along Sevier fault, at Orderville. Right, Carmel and Navajo; left, Straight Cliffs formation (Cretaceous). Kane County, Utah. 1936. #1:/Gregory H.E. Collection/ghe00759 ID. Gregory, H.E. 759 Straight Cliffs and Wahweap sandstones (Cretaceous), head of La Verkin Creek, Washington County, Utah. 1936. #1:/Gregory H.E. Collection/ghe00760 ID. Gregory, H.E. 760 Moenkopi (upper two-thirds) overlaid by Shinarump 2 miles west of Rockville, Washington County, Utah. 1936 #1:/Gregory H.E. Collection/ghe00761 ID. Gregory, H.E. 761 Upper Moenkopi Shanabkaib member at base showing sandstone ledge. Shinarump at top, Rockville, Washington County, Utah. 1936. #1:/Gregory H.E. Collection/ghe00762 ID. Gregory, H.E. 762 Detail structure, Wingate sandstone, Cave Lakes Canyon, Kane County, Utah. 1936. Published as figure 43 in U.S. Geological Survey. Professional paper 220. 1950. #1:/Gregory H.E. Collection/ghe00763 ID. Gregory, H.E. 763 Looking southeast across Rockville, Moenkopi (at river), Shinarmup (mesa caps), Chinle (broken slopes), Mavaio (top), forming Eagle Crag (right), and South Mountain (left). Washington County, Utah. 1936. #1:/Gregory H.E. Collection/ghe00764 ID. Gregory, H.E. 764 Navajo sandstone, branch of Parashant Wash north of Cane Beds, Arizona. Kane County, Utah. 1936. #1:/Gregory H.E. Collection/ghe00766 ID. Gregory, H.E. 766 Elephant Gap in Harris Mountain from Arizona-Utah line north of Cane Beds. Navajo sandstone, foreground, and cliffs, Carmel caps, Kane County, Utah. 1936 #1:/Gregory H.E. Collection/ghe00767 ID. Gregory, H.E. 767 Conglomerate in Wasatch formation Tertiary Red Canyon, Garfield County, Utah. 1936. Published as figure 23 in U.S. Geological Survey. Professional paper 226. 1951. #1:/Gregory H.E. Collection/ghe00768 ID. Gregory, H.E. 768 Mouth of Red Canyon looking north along Sevier fault. Lava on top and sides broken by fault. Garfield County, Utah. 1936. #1:/Gregory H.E. Collection/ghe00769 ID. Gregory, H.E. 769 Looking east across Sevier River near Hatch River terraces in middle distance, "Pink Cliffs" (Wasatch) in background bounded by Sevier fault. Garfield County, Utah. 1936. #1:/Gregory H.E. Collection/ghe00770 ID. Gregory, H.E. 770 Banded Navajo sandstone near place where Wingate and Kayenta first lose their identity. Chinle immediately below. Two miles northwest of Pipe Springs. Mohave County, Arizona. 1936. #1:/Gregory H.E. Collection/ghe00771 ID. Gregory, H.E. 771 Kaibab Indian School looking north. Cliffs at left, Chinle capped by Wingate-Navajo. Cuesta at left, Moenkopi capped by Shinarump. Mohave County, Arizona. 1936 #1:/Gregory H.E. Collection/ghe00772 ID. Gregory, H.E. 772 Dunes part of a large area head of Sand Wash, Kane County, Utah. 1936. Published as figure 132 in U.S. Geological Survey. Professional paper 220. 1950. #1:/Gregory H.E. Collection/ghe00773 ID. Gregory, H.E. 773 Cliff houses in branch of Cottonwood Canyon northwest of Kanab, Kane County, Utah. 1936. #1:/Gregory H.E. Collection/ghe00774 ID. Gregory, H.E. 774 Wingate sandstone, Cottonwood Canyon, Kane County, Utah. 1936. #1:/Gregory H.E. Collection/ghe00775 ID. Gregory, H.E. 775 Front of landslide (entire picture) in Zion Canyon, mouth of Birch Creek. Washington County, Utah. 1936. #1:/Gregory H.E. Collection/ghe00776 ID. Gregory, H.E. 776 Springdale member of Chinle formation. Pine Creek, Zion National Park. Shales with fish fossils just below. Washington County, Utah. 1936. Published as figure 35 in U.S. Geological Survey. Professional paper 220. 1950. #1:/Gregory H.E. Collection/ghe00777 ID. Gregory, H.E. 777 Chinle "marls", Sand Wash, Mohave County, Arizona. 1936. #1:/Gregory H.E. Collection/ghe00778 ID. Gregory, H.E. 778 Chinle "marls", Sand Wash, Mohave County, Arizona. 1936. #1:/Gregory H.E. Collection/ghe00779 ID. Gregory, H.E. 779 Chinle "marls", Sand Wash, Mohave County, Arizona. 1936. #1:/Gregory H.E. Collection/ghe00780 ID. Gregory, H.E. 780 Chinle "marls", Sand Wash, Mohave County, Arizona. 1936. Published as figure 37 in U.S. Geological Survey, Professional paper 220. 1950. #1:/Gregory H.E. Collection/ghe00781 ID. Gregory, H.E. 781 Chinle "marls", Springdale, Washington County, Utah. 1936. #1:/Gregory H.E. Collection/ghe00782 ID. Gregory, H.E. 782 Sandstone ledges in upper part of Moenkopi. Shinarump conglomerate at extreme top. Rockville, Washington County, Utah. 1936. Published as figure 30 in U.S. Geological Survey. Professional paper 220. 1950. #1:/Gregory H.E. Collection/ghe00783 ID. Gregory, H.E. 783 Lambs Point. Chinle including prominent Springdale member from base to highest cliff step, which is combined Wingate and Navajo, Kane County, Utah. 1936 #1:/Gregory H.E. Collection/ghe00784 ID. Gregory, H.E. 784 Navajo sandstone 200 feet above Chinle Rosencrans Wash. No Kayenta at Wingate in section. Mohave County, Arizona. 1936. #1:/Gregory H.E. Collection/ghe00785 ID. Gregory, H.E. 785 Bottom of Glen Canyon group. Color banded cross-bed sandstone in portions of Wingate Rosencrans Wash, Mohave County, Arizona. 1936. #1:/Gregory H.E. Collection/ghe00786 ID. Gregory, H.E. 786 Steamboat Rock. Moenkopi capped by Shinarump white Shanabkaib menber at base. On Fredonia-Pipe Springs road, Mohave County, Arizona. 1936 #1:/Gregory H.E. Collection/ghe00787 ID. Gregory, H.E. 787 North wall of Parunuweap Canyon. Chinle including Springdale member, first heavy ledge. Wingate, Kayenta, Navajo. Near Stevens Wash, Washington County, Utah. 1936. #1:/Gregory H.E. Collection/ghe00788 ID. Gregory, H.E. 788 Gypsum bed in Carmel formation near Shallow Park, Kane County, Utah. 1936. #1:/Gregory H.E. Collection/ghe00789 ID. Gregory, H.E. 789 Shinarump conglomerate at mouth of Parunuweap Canyon, Washington County, Utah. 1936. #1:/Gregory H.E. Collection/ghe00790 ID. Gregory, H.E. 790 Washington County, Utah. View looking west across valley cut in top Jurassic and Topic shale (Cretaceous) at head of La Verkin Creek, in distance, Timber top and other mesas of Navajo sandstone that form Hurrican Cliffs, Washington County, Utah. Year, 1937. #1:/Gregory H.E. Collection/ghe00791 ID. Gregory, H.E. 791 Washington County, Utah. Tropic shale, Cretaceous, head of La Verkin Canyon. Year, 1937 #1:/Gregory H.E. Collection/ghe00792 ID. Gregory, H.E. 792 Washington County, Utah. Timpoweap Canyon (Virgin River), Kaibab formation in bed of stream; conglomerate on rim, thin Kaibab; Timpoweap member of Moenkopi in cliffs. Year, 1937 #1:/Gregory H.E. Collection/ghe00793 ID. Gregory, H.E. 793 Washington County, Utah. Same as No. 793a. Timpoweap Canyon virgin River, bedded Conglomerate between beds of Kaibab Limestone. 1937. Published as Figure 27.U.S.G.S. Professional Paper 220. 1950. #1:/Gregory H.E. Collection/ghe00794 ID. Gregory, H.E. 794 Washington County, Utah. Looking north across Timpoweap Canyon; foreground Kaibab; middle flat, base of Moenkopi red shales; distance, Moenkopi capped by Shinarump; platform at upper left, Virgin limestone member. Year, 1937 #1:/Gregory H.E. Collection/ghe00795 ID. Gregory, H.E. 795 Washington County, Utah. Row of basalt capped Moenkopi mesas near the crest of Hurricane; Sugar loaf in lower right; Pine Valley Mountain. (Negative of this picture misplaced) Year, 1937. #1:/Gregory H.E. Collection/ghe00796 ID. Gregory, H.E. 796 Washington County Utah. Same as No. 795, but showing also foreground Workman Wash bordered by low cliffs of Virgin limestone. Year, 1937. #1:/Gregory H.E. Collection/ghe00797 ID. Gregory, H.E. 797 Washington County, Utah. Gray Knoll, volcanic cone on Little Creek Mountain. General surface of Shinarump conglomerate; Moenkopi low cliffs in foreground. Year, 1937. #1:/Gregory H.E. Collection/ghe00798 ID. Gregory, H.E. 798 Washington County, Utah. View looking west toward Caanan Gap of Short Creek. Road on Arizona-Utah line; foreground, flat cut in lowest Chinle beds; background, cliffs and ridges of eastward dipping Shinarump overlying Moenkopi, Utah. Year, 1937. #1:/Gregory H.E. Collection/ghe00799 ID. Gregory, H.E. 799 Mohave County, Utah Short Creek near village of Short Creek. Cutting of its channel 20-30 feet done since about 1885. Year, 1937. #1:/Gregory H.E. Collection/ghe0079a ID. Gregory, H.E. 79a Rainbow Bridge view from a distance of 1-2 mile. San Juan County, Utah. Henry Mountain. quadrangle. La Plata Sandstone. July, 1910. #1:/Gregory H.E. Collection/ghe00800 ID. Gregory, H.E. 800 Mohave County, Utah. Same as No. 799. Point of Vermilion Cliff in upper left. Year, 1937 #1:/Gregory H.E. Collection/ghe00801 ID. Gregory, H.E. 801 Washington County, Utah. View looking across valley of Little Creek. Shinarump capped cliffs along stream. Smithsonian Butte (right) Navajo Cliffs of Zion Park north across Virgin River. Year, 1937 #1:/Gregory H.E. Collection/ghe00802 ID. Gregory, H.E. 802 Washington County, Utah. Looking across Big Plains toward Smithsonian Butte (middle foreground), West Temple(upper right). Foreground forested east slope of Little Creek Mountain, Shinarump; middle distance, dry farm lands on Chinle strata. Year, 1937 #1:/Gregory H.E. Collection/ghe00803 ID. Gregory, H.E. 803 Kane County, Utah. Dunes head of Sand Canyon. Navajo strata in background. Year, 1937 #1:/Gregory H.E. Collection/ghe00804 ID. Gregory, H.E. 804 Kane County, Utah Flax Lake, one of five in landslide northeast of Glendale. Foreground floor of once larger lake. Year, 1937. #1:/Gregory H.E. Collection/ghe00805 ID. Gregory, H.E. 805 Kane County, Utah. Tower in Navajo sandstone, outlier of White Cliffs. Kanab Vally. Year, 1937. #1:/Gregory H.E. Collection/ghe00806 ID. Gregory, H.E. 806 Kane County, Utah. Unconformity - Moenkopi (below) and Shinarump (white) in gulch, two miles west of Paris village. Year, 1937 #1:/Gregory H.E. Collection/ghe00807 ID. Gregory, H.E. 807 Wayne County, Utah. Fremont River canyon west of Fruita (Moenkopi strata). Year, 1937 #1:/Gregory H.E. Collection/ghe00808 ID. Gregory, H.E. 808 Wayne County, Utah. Looking up Fremont River Canyon west of Fruita, Miners Mesa in middle distance. Wayne County, Utah. Year, 1937 #1:/Gregory H.E. Collection/ghe00809 ID. Gregory, H.E. 809 National Bridge, Bridge Canyon, three miles north-east of Fruita, Wayne Co., Utah. 1937 #1:/Gregory H.E. Collection/ghe00810 ID. Gregory, H.E. 810 National Bridge, Bridge Canyon, three miles north-east of Fruita, Wayne Co., Utah. 1937 #1:/Gregory H.E. Collection/ghe00811 ID. Gregory, H.E. 811 Split Tower, Wingate sandstone underlaid by Chinle beds, two miles or more northwest of Fruita, Wayne County, Utah. 1937. #1:/Gregory H.E. Collection/ghe00812 ID. Gregory, H.E. 812 Wayne County, Utah. Ghinle and Wingate, Fremont River near Fruita. Year, 1937. #1:/Gregory H.E. Collection/ghe00813 ID. Gregory, H.E. 813 Wayne County, Utah. Platform top of Navajo sandstone, Capitol Reef. Rim of Fremont River gorge in foreground. Year, 1937. #1:/Gregory H.E. Collection/ghe00814 ID. Gregory, H.E. 814 Shinarump sandstone(full thickness) underlaid by Moenkopi along Torrey-Fruita road. Year, 1937. #1:/Gregory H.E. Collection/ghe00815 ID. Gregory, H.E. 815 Wayne County, Utah. Boulders of lava on eroded surface of Moenkopi along Torrey-Fruita Utah. Wayne County, Utah Year, 1937 #1:/Gregory H.E. Collection/ghe00816 ID. Gregory, H.E. 816 Kane County, Utah, Carmel limestone overlain by later Jurassic and Cretaceous beds, Flume Canyon, near Glendale. 1938. #1:/Gregory H.E. Collection/ghe00817 ID. Gregory, H.E. 817 Kane County, Utah. View looking east across "The Cove", near Orderville: foreground, topmost Jurassic and Tropic formation; distance, Elkheart Cliffs, Navajo capped by Carmel. 1938. #1:/Gregory H.E. Collection/ghe00818 ID. Gregory, H.E. 818 Kane County, Utah, Winsor formation banded sandstone, Dakota at top. Muddy Brook. 1938 #1:/Gregory H.E. Collection/ghe00819 ID. Gregory, H.E. 819 Kane County, Utah. Winsor formation just below Dakota shown at top, branch of Muddy Brook. 1938. #1:/Gregory H.E. Collection/ghe00820 ID. Gregory, H.E. 820 Kane County, Utah. Winsor formation just below Dakota shown at top, branch of Muddy Brook. Showing mode of weathering. 1938 #1:/Gregory H.E. Collection/ghe00821 ID. Gregory, H.E. 821 Winsor formation in top of ridge near Cannonville, showing style of erosion and color banding. Garfield County, Utah. 1938. Published as figure 14 in U.S. Geological Survey. Professional paper 226. 1951. #1:/Gregory H.E. Collection/ghe00822 ID. Gregory, H.E. 822 Winsor formation in top of ridge near Cannonville, with Dakota sandstone cap at top. Garfield County, Utah. 1938. #1:/Gregory H.E. Collection/ghe00823 ID. Gregory, H.E. 823 Entrada sandstone in road cut west of Mount Carmel. Kane County, Utah. 1938. Published as figure 56 in U.S. Geological Survey. Professional paper 220. 1950. #1:/Gregory H.E. Collection/ghe00824 ID. Gregory, H.E. 824 Limestone near base of Timpoweap member of the Moenkopi formation, Alkali Wash. Washington County, Utah. 1938. #1:/Gregory H.E. Collection/ghe00825 ID. Gregory, H.E. 825 Kane County, Utah, Gypsum bed 30 plus feet thick at highway crossing of Muddy Brook, south of Mt. Carmel. 1938. #1:/Gregory H.E. Collection/ghe00826 ID. Gregory, H.E. 826 Kane County, Utah. Chinle formation, upper part; Paria Canyon one plus-minus mile above mouth of Kitchen canyon. 1938. #1:/Gregory H.E. Collection/ghe00827 ID. Gregory, H.E. 827 Chinle formation, same as no. 826, viewed one-half plus-minus miles along strike. 1938. #1:/Gregory H.E. Collection/ghe00828 ID. Gregory, H.E. 828 Kane County, Utah. Chinle formation; Petrified Forest member capped by thick sandstone beds, Paria Canyon. 1938. #1:/Gregory H.E. Collection/ghe00829 ID. Gregory, H.E. 829 Kane County, Utah. Contact Wingate and Kayenta formation, branch of Kitchen Canyon east of White Cove. 1938. #1:/Gregory H.E. Collection/ghe00830 ID. Gregory, H.E. 830 Kane County, Utah, Basalt flow from Bald Knob Volcano, upper Johnson Canyon. 1938. #1:/Gregory H.E. Collection/ghe00831 ID. Gregory, H.E. 831 Kane County, Utah. Winsor formation capped by Dakota on Alton-Johnson road, 3 plus-minus miles east of Sink Creek. 1938. #1:/Gregory H.E. Collection/ghe00832 ID. Gregory, H.E. 832 Kane County, Utah. Gypsum, Curtis formation on Alton-Johnson road, 3 plus-minus miles east of Sink. 1938. #1:/Gregory H.E. Collection/ghe00833 ID. Gregory, H.E. 833 Kane County, Utah. White bed in Kaiparowlts formation (bed 38 of measured section), Tenney Canyon. 1938. #1:/Gregory H.E. Collection/ghe00834 ID. Gregory, H.E. 834 Kane County, Utah, Moenkopi formation 2 plus-minus miles west of Paria on old Kanab trail. 1938. #1:/Gregory H.E. Collection/ghe00835 ID. Gregory, H.E. 835 Kane County, Utah. Wingate sandstone head of the upper south branch of Kitchen Canyon, east of White Cone. 1938. #1:/Gregory H.E. Collection/ghe00836 ID. Gregory, H.E. 836 Kane County, Utah. No Man's Mesa. Navajo sandstone; Kayenta, Wingate and upper Chinle in foreground, head of Kitchen, Canyon. 1938. #1:/Gregory H.E. Collection/ghe00837 ID. Gregory, H.E. 837 Kane County, Utah. White cone, Navajo sandstone; Wingate first cliff at base, Chinle bslow. 1938 #1:/Gregory H.E. Collection/ghe00838 ID. Gregory, H.E. 838 Kane County, Utah. Entrada sandstone overlain by the heavy gypsum bed of the Curtis formation. Carmel limestone at left brought to level of Entrada by a fault on Highway 15 near junction with Highway 89. 1938. #1:/Gregory H.E. Collection/ghe00839 ID. Gregory, H.E. 839 Kane County, Utah. Temple Gap member of the Navajo formation overlain by Carmel limestone Head of Parunuweap Canyon. 1938 #1:/Gregory H.E. Collection/ghe00840 ID. Gregory, H.E. 840 Kane County, Utah, Temple cap member of the Navajo formation near east entrance to Zion National Park. 1938. #1:/Zion National Park/ghe00841 ID. Gregory, H.E. 841 Zion National Park, Utah. Navajo Sandstone on the south wall of East Temple. Shows typical jointing, local faulting, and style of erosion. Temple Cap Member at the top. Vertical distance is 2,100 feet. 1938. Figure 49, U.S. Geological Survey Professional Paper 220. #1:/Zion National Park/ghe00842 ID. Gregory, H.E. 842 Zion National Park, Utah. Navajo Sandstone on Bridge Mountain, viewed from the south base of East Temple across Pine Creek. Tunnel Road on the lower right. 1938. #1:/Zion National Park/ghe00843 ID. Gregory, H.E. 843 Zion National Park, Utah. Chinle Formation, limestone, sandstone and fossiliferous shale beds above Springdale Sandstone Member in Kanab Canyon. Locally faulted. 1938. Figure 34, U.S. Geological Survey Professional Paper 220. #1:/Gregory H.E. Collection/ghe00844 ID. Gregory, H.E. 844 Kane Utah, The village of Paria abandoned. 1939. #1:/Gregory H.E. Collection/ghe00845 ID. Gregory, H.E. 845 Kane County, Utah. Fault at Mt. Carmel Junction looking southeast. Carmel limestone on upthrown side (middle); Entrada (foreground). 1939. #1:/Gregory H.E. Collection/ghe00846 ID. Gregory, H.E. 846 Washington County, Utah. Timpoweap member of Moenkopi formation in Timpoweap Canyon at intake of Le Verkin irrigation ditch. Rests on Kaibab extreme lower right. 1939 #1:/Gregory H.E. Collection/ghe00847 ID. Gregory, H.E. 847 Washington County, Utah. Contact of fossillferous Kaibab (base) and fessiliferous Moenkopi (top), Isom Wash. Exact contact not place. 1939 #1:/Gregory H.E. Collection/ghe00848 ID. Gregory, H.E. 848 Kane County, Utah. Consolidated river gravel (Wisconsin age?) overlying eroded Entrada (?) 300 feet above Paria River 2 miles south of Cannonville. 1939. #1:/Gregory H.E. Collection/ghe00849 ID. Gregory, H.E. 849 Kane County, Utah. Consolidated river gravel (Wisconsin age?) overlying eroded Entrada (?) 300 feet above Paria River 2 miles south of Cannonville. 1939. #1:/Gregory H.E. Collection/ghe00850 ID. Gregory, H.E. 850 Kane County, Utah. Navajo sandstone (bottom) Carmel limestone (middle), Entrada (top) head of box canyon, Paria River. 1939. #1:/Gregory H.E. Collection/ghe00851 ID. Gregory, H.E. 851 Kane County, Utah. Entrada (massive phase) Paria Valley 4 plus-minus miles south of Cannonville. 1939. #1:/Gregory H.E. Collection/ghe00852 ID. Gregory, H.E. 852 Kane County, Utah. Entrada sandstone (bottom) in contact with shales and gypsum of curtis formation - Paria Valley 4 plus-minus miles south of Cannonville. 1939. #1:/Gregory H.E. Collection/ghe00853 ID. Gregory, H.E. 853 Washington County, Utah. Ancient talus (right foreground) and talus now forming at base of Kinesava mountain, Zion National Park, 1939. #1:/Gregory H.E. Collection/ghe00854 ID. Gregory, H.E. 854 Kane County, Utah. Bed of Little Creek, sunk 10 to 40 feet into alluvium since 1890. 1939. #1:/Gregory H.E. Collection/ghe00855 ID. Gregory, H.E. 855 Garfield County, Utah. Wasatch cliff (top), Kaiparowitz (slope) and upper beds of Wahweap formations, Wilson Point, Sunset Cliffs, head of Hillsdale Canyon. 1939. #1:/Gregory H.E. Collection/ghe00856 ID. Gregory, H.E. 856 Contact of old and recent basalt flows near head of Gould Canyon. Washington County, Utah. 1939. #1:/Gregory H.E. Collection/ghe00857 ID. Gregory, H.E. 857 Washington County, Utah. Edge of basalt flow over eroded Moenkopi along highway west of Grafton. 1939. #1:/Gregory H.E. Collection/ghe00858 ID. Gregory, H.E. 858 Kane county, Utah. Carmel formation in Mineral Gulch. Typical arrangement of shaly and massive beds. 1939. #1:/Gregory H.E. Collection/ghe00859 ID. Gregory, H.E. 859 Kane County, Utah. Winsor formation type locality, Winsor Cove, branch of Muddy Brook. Overlying Dakota at top (right). 1939. #1:/Gregory H.E. Collection/ghe00860 ID. Gregory, H.E. 860 Kane County, Utah. Tropic shale, Muddy Brook 6 plus-minus miles above its mouth. 1939 #1:/Gregory H.E. Collection/ghe00861 ID. Gregory, H.E. 861 Consolidated gravels on wall of Parunuweap Canyon near Mount Carmel Junction. Kane County, Utah. 1939. Published as figure 106 in U.S. Geological Survey. Professional paper 220. 1950. #1:/Gregory H.E. Collection/ghe00862 ID. Gregory, H.E. 862 Base of Straight Cliffs formation (Cretaceous) at Orderville. Tropic shale forms slope at bottom. Kane County, Utah. 1939. #1:/Gregory H.E. Collection/ghe00863 ID. Gregory, H.E. 863 Gypsum of Curtis formation (cliff at top) and Entrada (slope), Short Branch of Parunuweap about one mile south of Mount Carmel. Kane County, Utah. 1939. #1:/Gregory H.E. Collection/ghe00864 ID. Gregory, H.E. 864 San Rafael group and Winsor formation, east wall of Meadow Creek Canyon. Carmel, Entrada, Curtis, Winsor, Navajo in bed of canyon. Kane County, Utah. 1939. Published as figure 53 in U.S. Geological Survey. Professional paper 220. 1950. #1:/Gregory H.E. Collection/ghe00865 ID. Gregory, H.E. 865 Fault in short canyon east of road one mile south of Mount Carmel Junction. Carmel strata capped with old consolidated gravel. Kane County, Utah. 1939. #1:/Gregory H.E. Collection/ghe00866 ID. Gregory, H.E. 866 Straight Cliffs sandstone in contact with Tropic formation (basal slope); branch of valley of Parunuweap River near Orderville. Kane County, Utah. 1939. Published as figure 65 in U.S. Geological Survey. Professional paper 220. 1950. #1:/Gregory H.E. Collection/ghe00867 ID. Gregory, H.E. 867 Carmel formation (center) and higher Jurassic and Cretaceous beds (background) separated by Sevier fault. Flume Canyon. Kane County, Utah. 1939. Published as figure 54 in U.S. Geological Survey. Professional paper 220. 1950. #1:/Gregory H.E. Collection/ghe00868 ID. Gregory, H.E. 868 Carmel formation in branch of Flume Canyon (about half of total shown). Kane County, Utah. 1939. #1:/Gregory H.E. Collection/ghe00869 ID. Gregory, H.E. 869 Kane County, Utah. Johnson Creek. Old alluvial fill trenched 40 feet since 1915. 1939. #1:/Gregory H.E. Collection/ghe00870 ID. Gregory, H.E. 870 Washington County, Utah. Entrada formation. Gypsiferous Curtis at top. Hear mouth of Crystal Creek, 1939. #1:/Gregory H.E. Collection/ghe00871 ID. Gregory, H.E. 871 Kane County, Utah. Straight Cliff sandstone top, Tropic Dakota and Winsor formation in middle and foreground, covered by land slides. Basalt at right and on top. Head of Oak Creek. 1939. #1:/Gregory H.E. Collection/ghe00872 ID. Gregory, H.E. 872 Washington County, Utah. Fosslliferous Straight Cliffs sandstone. Kolob Terrace. 1939. #1:/Gregory H.E. Collection/ghe00873 ID. Gregory, H.E. 873 Cougar Mountain fault. Springdale member of Chinle (lower left) abutting against base of Navajo (lower right). Washington County, Utah. 1939. #1:/Gregory H.E. Collection/ghe00874 ID. Gregory, H.E. 874 Firepit Knoll crater on Kolob Terrace. Lava flow (foreground), Navajo sandstone and Carmel formation (cliffs, background). Washington County, Utah. 1939. Published as figure 78 in U.S. Geological Survey. Professional paper 220. 1950. #1:/Gregory H.E. Collection/ghe00875 ID. Gregory, H.E. 875 Winsor formation, Winsor Cove, type section, 3 miles southwest of Mount Carmel. White banded with red, overlain by Dakota? sandstone (not visible), upper right. Kane County, Utah. 1939. Published as figure 60 in U.S. Geological Survey. Professional paper 220. 1950. #1:/Gregory H.E. Collection/ghe00876 ID. Gregory, H.E. 876 Another view of Winsor formation, Winsor Cove. Kane County, Utah. 1939. #1:/Gregory H.E. Collection/ghe00877 ID. Gregory, H.E. 877 Washington County, Utah. Head of Oak Valley area of landslides from Straight Cliffs sandstone (background), Tropic shale (foreground). 1939 #1:/Gregory H.E. Collection/ghe00878 ID. Gregory, H.E. 878 Washington County, Utah. View of Oak Valley from west. Carmel white (foreground), Tropic shale overlain by landslides (middle distance), Straight Cliffs sandstone (cliffs), Wasatch cliffs on skyline. 1939. #1:/Gregory H.E. Collection/ghe00879 ID. Gregory, H.E. 879 Washington County, Utah. Camp Creek near its mouth in Hurricane Cliffs. Navajo sandstone overlain by Carmel Entrada, Curtis and Winsor. Pine Valley nountains (right distance). 1939. #1:/Gregory H.E. Collection/ghe00880 ID. Gregory, H.E. 880 Washington County, Utah. Spring creek. From open valley (foreground) on Carmel limestone passes into canyon In Navajo sandstone that in part forms Hurricane Cliffs. Typical stream on western Kolob Terrace. 1939. #1:/Gregory H.E. Collection/ghe00881 ID. Gregory, H.E. 881 Straight Cliffs sandstone, capped by basalt, head of Oak Creek. Washington County, Utah. 1939. #1:/Gregory H.E. Collection/ghe00882 ID. Gregory, H.E. 882 Washington County, Utah. Undrained pond on surface of lava, Kolob Terrace. 1939. #1:/Gregory H.E. Collection/ghe00883 ID. Gregory, H.E. 883 Washington County, Utah. Le Verkin Breaks, looking west, Navajo sandstone capped by Carmel limestone and cut by canyons 800 to 2,000 feet deep. Pine Galley Mountains in distance. 1939. #1:/Gregory H.E. Collection/ghe00884 ID. Gregory, H.E. 884 Washington County, Utah. Surface of Kolob Terrace. Divide between North Creek and Kolob Creek. 1939. #1:/Gregory H.E. Collection/ghe00885 ID. Gregory, H.E. 885 Washington County, Utah. Surface of Kolob terrace showing sharp drop to heads of deep canyons. Lava in foreground. 1939. #1:/Gregory H.E. Collection/ghe00886 ID. Gregory, H.E. 886 Washington County, Utah. Meadow land along upper Kolob Creek, developed in Tropic shale. 1939. #1:/Gregory H.E. Collection/ghe00887 ID. Gregory, H.E. 887 Washington County, Utah. Surface of Kolob Terrace near head of Kolob. 1939. #1:/Gregory H.E. Collection/ghe00888 ID. Gregory, H.E. 888 Kane County, Utah, Landslides in Chinle near mouth of the Parunuweap, Springdale member (right center). 1939. #1:/Gregory H.E. Collection/ghe00889 ID. Gregory, H.E. 889 Washington County, Utah. Floor of "sink" in Carmel limestone showing solution channels in bedded rock and opening of underground drainage channel. Near Blue Springs, Kolob Terrace. 1939. #1:/Gregory H.E. Collection/ghe00890 ID. Gregory, H.E. 890 Kane County, Utah. Northernmost of three Flax Lakes on high divide between Kanab and Prunuweap Valleys. In Cretaceous beds. Looking northeast across head of Kanab Valley to Pink Cliffs (Tertiary). 1939 #1:/Gregory H.E. Collection/ghe00891 ID. Gregory, H.E. 891 Kane county, Utah. Flax Lakes (same unit). A branch canyon of Kanab Creek extending toward it. 1939. #1:/Gregory H.E. Collection/ghe00892 ID. Gregory, H.E. 892 Washington County, Utah. Top of East temple. Carmel limestone (top layers), Temple Cap member of Navajo (cliff), core rock of Navajo (foreground). 1938. #1:/Gregory H.E. Collection/ghe00893 ID. Gregory, H.E. 893 Washington County, Utah. View looking south-southwest from foothills 2 plus-minus miles west of Virgin City. Shnabkaib member of Moenkopi (foreground). Timpweap member of Moenkepi into which Timpweap Canyon of the Virgin River is cut (middle distance). Sugar Loaf and other lava capped mesas (left distance); crst of Hurricane Cliffs (right distance). 1938. #1:/Gregory H.E. Collection/ghe00894 ID. Gregory, H.E. 894 Mohave county, Arizona. The Steamboat. Shnabkaib (bottom) and upper red level of Moenkopi capped in part by Shinarump 2 plus miles west of Fredonia. 1939 #1:/Gregory H.E. Collection/ghe00895 ID. Gregory, H.E. 895 Mohave county, Arizona. The Steamboat. Shnabkaib (bottom) and upper red level of Moenkopi capped in part by Shinarump 2 plus miles west of Fredonia. 1939. #1:/Gregory H.E. Collection/ghe00896 ID. Gregory, H.E. 896 Washington County. Utah. Ancient gravels, (left center) form terrace both sides of Virgin River between Rockville and Grafton. Rest unconformably on middle Moenkopi beds, Upper Moenkopi, Shinarump, Chinle, and Navajo above. 1939. #1:/Gregory H.E. Collection/ghe00897 ID. Gregory, H.E. 897 Detail of Pleistocene or Pliocene? conglomerate, Sink Valley. Washington County, Utah. 1939. Published as figure 28 in U.S. Geological Survey. Professional paper 226. 1951. #1:/Gregory H.E. Collection/ghe00898 ID. Gregory, H.E. 898 "Elephants feet." Wingate sandstone, Kayenta above. Three Lakes Canyon. Kane County, Utah. 1939. #1:/Gregory H.E. Collection/ghe00899 ID. Gregory, H.E. 899 Wingate sandstone, detailed structure. Flat-lying Kayenta above Cave Lakes Canyon. Kane County, Utah. 1939. #1:/Gregory H.E. Collection/ghe00900 ID. Gregory, H.E. 900 Detailed structures in Wingate sandstone. Cave Lakes Canyon. Kane County, Utah. 1939. Published as figure 44 in U.S. Geological Survey. Professional paper 220. 1950. #1:/Gregory H.E. Collection/ghe00901 ID. Gregory, H.E. 901 Wingate sandstone, detailed structure. Flat-lying Kayenta above Cave Lakes Canyon. Kane County, Utah. 1939. #1:/Gregory H.E. Collection/ghe00902 ID. Gregory, H.E. 902 Zion National Park, Utah. Landslide in Chinle formation from base of Navajo Mts. Sandstone, Springdale member of Chinle (middle right). Near headquarters. 1939. #1:/Gregory H.E. Collection/ghe00903 ID. Gregory, H.E. 903 Kane County. Utah. Joints in Navajo sandstone on Zion-Mount Carmel road. 1939. #1:/Gregory H.E. Collection/ghe00904 ID. Gregory, H.E. 904 Same as No. 903. 1939. #1:/Gregory H.E. Collection/ghe00905 ID. Gregory, H.E. 905 Coconino county, Arizona. Northern edge Kanab Plateau, Village of Fredonia on surface eroded from lower Moenkopi beds and crossed by Kanab Creek. Buttes of Moenkopi capped by Shinarump (right). 1939. #1:/Gregory H.E. Collection/ghe00906 ID. Gregory, H.E. 906 Mohave county, Arizona. Surface of Uinkaret Plateau southwest of Cane Beds. August 2, 1932. #1:/Gregory H.E. Collection/ghe00907 ID. Gregory, H.E. 907 Kane County, Utah. Lake in Three Lakes Canyon fed from springs in Cane at the base of Navajo sandstone. 1939. #1:/Gregory H.E. Collection/ghe00908 ID. Gregory, H.E. 908 Kane county, Utah. Eroded alluvial fill 60 feet thick In Kanab Creek. In 1884 stream ran at top of terrace. 1939. #1:/Gregory H.E. Collection/ghe00909 ID. Gregory, H.E. 909 Coconino County, Arizona. Shinarump and Moenkopi beds disturbed by a local fault 3 plus-minus miles north of Fredonia. 1939. #1:/Gregory H.E. Collection/ghe00910 ID. Gregory, H.E. 910 Kane County, Utah. Erosion surface on lower Chinle beds at base of Vermilion Cliffs, traversed by Kanab Creek (left center). 1939. #1:/Gregory H.E. Collection/ghe00911 ID. Gregory, H.E. 911 Kane County, Utah. Ancient stream gravels (Wisconsin?) 80 plus feet above Virgin River rest on Carmel limestone near Mt. Carmel Junction. 1939. #1:/Gregory H.E. Collection/ghe00912 ID. Gregory, H.E. 912 Ancient stream gravel detail of no. 911. Kane County, Utah. Ancient stream gravels (Wisconsin?) 80 plus feet above Virgin River rest on Carmel limestone near Mt. Carmel Junction. 1939. #1:/Gregory H.E. Collection/ghe00913 ID. Gregory, H.E. 913 Washington County, Utah. View looking west toward buttes of Moenkopi capped by lava between Hurricane Cliffs and Workman Wash (foreground). 1939. #1:/Gregory H.E. Collection/ghe00914 ID. Gregory, H.E. 914 Washington County, Utah. Mouth Timpoweap Canyon of Virgin River looking east up stream. Kaibab and Moenkopi strata also basalt (upper left). Hurricane fault trends northsouth in foreground. 1939. #1:/Gregory H.E. Collection/ghe00915 ID. Gregory, H.E. 915 Washington County, Utah. Timpoweap canyon at mouth of Alkali Wash (enters right center), Fossiliferous Permian at stream level, Triassic limestone outer walls. Intervening slope of conglomerate and calcareous sandstone. 1939. #1:/Gregory H.E. Collection/ghe00916 ID. Gregory, H.E. 916 Washington County, Utah. South wall of Timpoweap canyon near mouth of Alkali Wash. Kaibab limestone (base), two beds of conglomerate separated by erosion surface, Moenkopi limestone top. 1939. #1:/Gregory H.E. Collection/ghe00917 ID. Gregory, H.E. 917 Washington County, Utah. Permian-Triassic contact In Goulds canyon (of Little Creek). Kaibab (lowest ledge), conglomerate (second ledge), Moenkopi (third ledge end top). 1939. #1:/Gregory H.E. Collection/ghe00918 ID. Gregory, H.E. 918 Mohave County, Arizona. Erosion surface produced by levelling Chinle strata at the base of Vermilion Cliffs south of Cane beds. 1939. #1:/Gregory H.E. Collection/ghe00919 ID. Gregory, H.E. 919 Washington County, Utah. Divide dike basalt intruded in Moenkopi beds, head of Workman Wash. 1939. #1:/Gregory H.E. Collection/ghe00920 ID. Gregory, H.E. 920 Mohave County, Arizona. Moenkopi showing typical erosion of its shaly sandstone on Hurricane-Antelope Springs road. 1939. #1:/Gregory H.E. Collection/ghe00921 ID. Gregory, H.E. 921 Mohave County, Arizona. Fault in lower Moenkopi shaly sandstone head of Rock canyon (of Short Creek). 1939. #1:/Gregory H.E. Collection/ghe00922 ID. Gregory, H.E. 922 Mohave County, Arizona. Folds In Moenkopi stratat Short Creek east of Rock canyon. 1939. #1:/Gregory H.E. Collection/ghe00923 ID. Gregory, H.E. 923 Mohave County. Arizona. South wall of Rock Canyon. Kaibab (on valley floor and up to first ledge). Conglomerate, Moenkopi (upper part of slop and line cliffs). 1939. #1:/Gregory H.E. Collection/ghe00924 ID. Gregory, H.E. 924 Mohave County, Arizona. Short Creek near the exit from its canyon, in Vermilion Cliffs. Alluvial terraces and broad channel made during past 50 years. 1939. #1:/Gregory H.E. Collection/ghe00925 ID. Gregory, H.E. 925 Cottonwood trees buried by sand dunes; trunks reexposed by recent excavations of alluvial valley fill, Short Creek. Maohave County, Arizona. 1939. #1:/Gregory H.E. Collection/ghe00926 ID. Gregory, H.E. 926 Alluvial fill in upper Johnson Canyon cut into terraces at two levels since 1920. Kane County, Utah. 1939. Published as figure 108 in U.S. Geological Survey. Professional paper 220. 1950. #1:/Gregory H.E. Collection/ghe00927 ID. Gregory, H.E. 927 Spring (lower left) on local fault marked by displacement and Slickensides (lower left), Johnson Canyon. Kane County, Utah. 1939. #1:/Gregory H.E. Collection/ghe00928 ID. Gregory, H.E. 928 Recess in Wingate sandstone at Granary in Johnson Canyon. Kane County, Utah. 1939. Published as figure 122 in U.S. Geological Survey. Professional paper 220. 1950. #1:/Gregory H.E. Collection/ghe00929 ID. Gregory, H.E. 929 Kane County, Utah. Entrada, Curtis, and Winsor formation overlain by Dakota (extreme top), Alton-Skutumpah road. 1939. #1:/Gregory H.E. Collection/ghe00930 ID. Gregory, H.E. 930 Kane County, Utah. Lava flow from Bald Knoll Crater (foreground), Upper Jurassic (lower cliffs), and Tertiary (upper cliffs). 1939. #1:/Gregory H.E. Collection/ghe00931 ID. Gregory, H.E. 931 Kane County, Utah. Wingate sandstone and Kayenta formation, Johnson Canyon. 1939. #1:/Gregory H.E. Collection/ghe00932 ID. Gregory, H.E. 932 932 Same as No. 931 Kane County, Utah. Wingate sandstone and Kayenta formation, Johnson Canyon. 1939. #1:/Gregory H.E. Collection/ghe00933 ID. Gregory, H.E. 933 Kane County, Utah. Lake, one of three in Le Vanger Wash. Surrounding trills Wasatch formation. Original obstruction of stream by alluvial fans made permanent by artificial dam. 1939. #1:/Gregory H.E. Collection/ghe00934 ID. Gregory, H.E. 934 Kane county, Utah. Kalperowits formation along Parunuweap below lava narrows. 1939. #1:/Gregory H.E. Collection/ghe00935 ID. Gregory, H.E. 935 Kane county, Utah. Lava Narrows. The Parunuweap has worn its way through basalt that filled its original canyon. Stream flows in groove at side of road. 1939. #1:/Gregory H.E. Collection/ghe00936 ID. Gregory, H.E. 936 Garfield County, Utah. Summervllie (?) formation, Paria River canyon below mouth of Henrievllle Creek. 1939. #1:/Gregory H.E. Collection/ghe00937 ID. Gregory, H.E. 937 Summerville formation?, Paria River Canyon below mouth of Henrieville Creek. Garfield County, Utah. 1939. #1:/Gregory H.E. Collection/ghe00938 ID. Gregory, H.E. 938 White Cliffs in Johnson Valley; Navajo sandstone, 1,400 feet thick, capped by limestone of Carmel formation; cliffs continuous for about 40 miles. Alluvial terrace formed by trenching of valley fill. Kane County, Utah. 1939. Published as figure 11 in U.S. Geological Survey. Professional paper 220. 1950; figure 30 in U.S. Geological Survey. Professional paper 226. 1951. #1:/Gregory H.E. Collection/ghe00939 ID. Gregory, H.E. 939 Navajo sandstone, part of White Cliffs, near head of Johnson Canyon, Kane County, Utah. 1939. #1:/Gregory H.E. Collection/ghe00940 ID. Gregory, H.E. 940 Kane County, Utah. Surface of Skutumpah Terrace looking east and across Kanab Canyon, Crest of White Cliffs (right distance). 1939. #1:/Gregory H.E. Collection/ghe00941 ID. Gregory, H.E. 941 Kane County, Utah. Corral Knoll volcanic cone, Kanab Valley, Kane County, Utah. Carmel limestone covered with lava (foreground), Cretaceous cliffs distance. 1939. #1:/Gregory H.E. Collection/ghe00942 ID. Gregory, H.E. 942 Kane County, Utah. Floor of and east wall of Alton amphitheatre, head of Kanab Creek. Flats in Tropic formation bordered by Cretaceous and Tertiary cliffs. Juniper trees. 1939. #1:/Gregory H.E. Collection/ghe00943 ID. Gregory, H.E. 943 Kane County, Utah. Gravel pass; divide between Sevier and Parunuweap drainage basins looking northeast. Sunset Cliffs, Tertiary (background), dissected alluvial fans tributary so Sevier (right middle), gravels drainage by Parunuweap (foreground), Paraunuweap captures head tributaries of Sevier, Oak brush and yellow pines. 1939. #1:/Gregory H.E. Collection/ghe00944 ID. Gregory, H.E. 944 Kane County, Utah. View looking north down workman Wash from divide between Little Creek and short Creek. Basalt (left), terrace on Virgin member of Moenkopi (middle), upper Moenkopi (right), Moenkopi, Shinarump Chinle and Navajo (distance). 1939. #1:/Gregory H.E. Collection/ghe00945 ID. Gregory, H.E. 945 Kane County, Utah. Vermilion Cliffs (Chinle and Navajo), north edge of Uinkaret Plateau (foreground), mouth of Short Creek, 1939. #1:/Gregory H.E. Collection/ghe00946 ID. Gregory, H.E. 946 Kane County, Utah. Big Plains, west dipping surface eroded on east dipping Chinle beds, now coated with coalescing fans, Little Creek Terrace in right background. 1939. #1:/Gregory H.E. Collection/ghe00947 ID. Gregory, H.E. 947 Mohave County, Arizona. Kaibab Indian school near Moccasin looking northeast toward head of two Mile Wash. Deep alluvial fill. Moenkopi capped by Shinarump (upper right), Chinle and Glen canyon beds cliffs at upper left and middle distance (Lambs Point). Branch of Sevier fault crosses divide between Two Mile Wash and Sand Creek at base of Indian Point (left middle). 1939. #1:/Gregory H.E. Collection/ghe00948 ID. Gregory, H.E. 948 Mohave county, Arizona. Kaibab Indian school looking north. Alluvial flats at head of Two Mile Wash. Branch of Sevier fault passes between Navajo (left distance) and Chinle-Navajo (middle distance). 1939. #1:/Pipe Spring National Monument/ghe00949 ID. Gregory, H.E. 949 Pipe Spring National Monument, Arizona. Winsor Castle, a fort built in 1870, now serves as monument headquarters. The spring, on the Sevier fault, crosses flat ground in front of the buildings. 1939. #1:/Gregory H.E. Collection/ghe00950 ID. Gregory, H.E. 950 Kane County, Utah. Alluvial terraces on Kanab Creek near mouth of Tiny Canyon. Excavated since 1882. 1939. #1:/Gregory H.E. Collection/ghe00951 ID. Gregory, H.E. 951 Kane County, Utah. Fault in Jurassic formations 3 plus-minus miles south of Mt. Carmel. Carmel limestone (left), Entrada and Carmel (right), Elkheart Cliffs (Navajo) (upper right). 1939. #1:/Gregory H.E. Collection/ghe00952 ID. Gregory, H.E. 952 Kane county Utah. General view of tilted Jurassic and Cretaceous beds looking northwest across Parunuweap Valley from base of Elkheart Cliffs southwest of Mt. Carmel; Valley of Muddy Brook (center) is at the contact of winsor and Dakota formations (left) and Tropic shale (right). 1939. #1:/Gregory H.E. Collection/ghe00953 ID. Gregory, H.E. 953 Kane county, Utah. View looking south down Meadow Brook across Parunuweap canyon to Block Mesas (skyline) on Moccasin Terrace. Canyon cut in San Rafael strata. Pinyons or Juniper. 1939. #1:/Gregory H.E. Collection/ghe00954 ID. Gregory, H.E. 954 Washington County, Utah. Landslide (all the material in view) near mouth of Birch Creek, Zion Canyon. Covers upper part and Springdale member (lower left) of the Chinle. Still active; Virgin River flows in groove at left of road. 1939. #1:/Gregory H.E. Collection/ghe00955 ID. Gregory, H.E. 955 Washington County, Utah. Landslide, 1 mile south of Springdale, covers strata from base of Navajo (top left) to Shinarump. Springdale member of Chinle (left middle). 1939. #1:/Gregory H.E. Collection/ghe00956 ID. Gregory, H.E. 956 Washington Count, Utah. Landslide at mouth of Parunuweap (right center) extends from south of Springdale (foreground) across Parunuweap to base of Eagle Crags (top center). Involves entire Chinle formation. 1939. #1:/Zion National Park/ghe00957 ID. Gregory, H.E. 957 Zion National Park, Utah. Navajo Sandstone, including Temple Cap Member (top), near the east entrance. Shows typical recessed arch. 1939. #1:/Gregory H.E. Collection/ghe00958 ID. Gregory, H.E. 958 Washington County, Utah. View looking south-southwest across Timpoweap Canyon (center) to crest of Hurricane Cliffs (skyline). Floor chiefly the surface of east-dipping beds of Timpoweap member of the Moenkopi. Lava capped mesas of upper Moenkopi (left distance). West of Virgin City. 1939. #1:/Gregory H.E. Collection/ghe00959 ID. Gregory, H.E. 959 Washington County, Utah. View looking up Virgin River from a point 2 plus-minus miles west of Virgin City, valley floor lower Moenkopi. Virgin member caps mesa (front left). Shinarump the terraces upstream. Navajo sandstone of South Mountain (right), Kinesawa Mountain (left) on skyline. 1939. #1:/Gregory H.E. Collection/ghe00960 ID. Gregory, H.E. 960 Washington county, Utah. Hurricane Cliffs at Anderson ranch, Kaibab and lower Moenkopi. Basalt (middle and upper right). 1939. #1:/Gregory H.E. Collection/ghe00961 ID. Gregory, H.E. 961 Garfield County, Utah. Surface of Paunsagunt Plateau looking southeast from near head of Red Canyon. Boat mesa (top left) and Whiteman mesa (top center) on skyline rise above general surface. 1939. #1:/Gregory H.E. Collection/ghe00962 ID. Gregory, H.E. 962 Garfield County, Utah. Alluvial filled valley of Paria River (center) southeast of Cannonville. White cliffs of Winsor formation capped by Dakota-Tropic; Pink Cliffs, Wasatch on left skyline. 1939. #1:/Gregory H.E. Collection/ghe00963 ID. Gregory, H.E. 963 Garfield County, Utah. Winsor formation coal-bearing Dakota at top; near mouth of Yellow Creek. 1939. #1:/Gregory H.E. Collection/ghe00964 ID. Gregory, H.E. 964 Garfield County, Utah. Wasatch formation near mouth of Red Canyon. Gray conglomerate conformable over massive pink limestone. Above it friable limestone, volcanic ash and basalt. 1939. #1:/Gregory H.E. Collection/ghe00965 ID. Gregory, H.E. 965 Garfield County, Utah. Sunset Cliffs as viewed east of Hatch. Sevier fault follows base of cliffs that include Cretaceous and Wasatch Pink Cliffs on skyline. 1939. #1:/Gregory H.E. Collection/ghe00966 ID. Gregory, H.E. 966 Mohave County. Arizona. Bridge built by C.C.C. across recently eroded Wash near Pipe Springs. 1939. #1:/Gregory H.E. Collection/ghe00967 ID. Gregory, H.E. 967 Mohave county, Arizona. Cedar Ridge, Cap of Shinarump conglomerate and upper Moenkopi extending south from Vermilion Cliffs onto Uinkaret Plateau west of Pipe Wash. August 2, 1939. #1:/Gregory H.E. Collection/ghe00968 ID. Gregory, H.E. 968 Mohava County, Arizona. Settlement of Moccasin Sprliags looking eastward toward Kaibab Indians School. Kaibab Plateau on skyline. 1939. #1:/Gregory H.E. Collection/ghe00969 ID. Gregory, H.E. 969 Mohave County, Arizona. View northward over Moccasin Springs along Sevier fault Navajo (left) and Chinle (right), on skyline. Deep alluvium trenched by stream from springs (foreground). 1939. #1:/Gregory H.E. Collection/ghe00970 ID. Gregory, H.E. 970 Kane County, Utah. Gypsum in Curtis formation near highway 89 crossing of Madder Brook. 1939. #1:/Pipe Spring National Monument/ghe00971 ID. Gregory, H.E. 971 Pipe Spring National Monument, Arizona. Winsor Castle, a fort built in 1870 which now serves as monument headquarters, looking south over Uinkaret Plateau. Kanab Canyon in the upper right. 1939 #1:/Pipe Spring National Monument/ghe00972 ID. Gregory, H.E. 972 Pipe Spring National Monument, Arizona. Door of Winsor Castle, a fort built in 1870 which now serves as monument headquarters. 1939. #1:/Pipe Spring National Monument/ghe00973 ID. Gregory, H.E. 973 Pipe Spring National Monument, Arizona. Walls of Winsor Castle, a fort built in 1870 which now serves as monument headquarters. Modern door and windows replace rifle grooves. 1939. #1:/Gregory H.E. Collection-Pipe Spring National Monument/ghe00974 ID. Gregory, H.E. 974 Mohave County, Arizona. Erosion surface at edge of Vermilion Cliffs west of Pipe Springs. Streams cross Sevier fault from downthrow to upthrow side. 1939. #1:/Gregory H.E. Collection/ghe00975 ID. Gregory, H.E. 975 Coconino County, Arizona. Cowboy Butte 2 plus-minus miles north of Fredonia. Moenkopi (Shnabkaib member at base) and Shinarump. 1939 #1:/Gregory H.E. Collection/ghe00976 ID. Gregory, H.E. 976 Kane County, Utah. Falls in Kanab Creek near Corral Knoll. Carmel formation. Ancient channel of the Kanab filled with alluvium. 1939 #1:/Gregory H.E. Collection/ghe00977 ID. Gregory, H.E. 977 Kane County, Utah. Lake In Le Vanger Wash on alluvium that generally elsewhere has been trenched by recent erosion. 1939. #1:/Gregory H.E. Collection/ghe00978 ID. Gregory, H.E. 978 Garfield County, Arizona. Top of Paunsaugunt Plateau north of Red Canyon, Bryce Park Road; area Formerly Cultivated, now Sage Brush. 1940 #1:/Gregory H.E. Collection/ghe00979 ID. Gregory, H.E. 979 Garfield Co., Utah. Valley of east Creek - typical of Swales and Mounds on top of Paunsaugunt Plateau. Boxed Springs Source of water for Union Pacific Lodge, Bryce Canyon National Park. 1940. #1:/Gregory H.E. Collection/ghe00980 ID. Gregory, H.E. 980 Garfield Co., Utah. Valley of east fork on the Sevier River near mouth of Podonk Creek. 1940. #1:/Bryce Canyon National Park/ghe00981 ID. Gregory, H.E. 981 Bryce Canyon National Park, Utah. Features of the Paunsaugunt Fault in Campbell Canyon. Tropic shale (right) abuts against the Wasatch Formation (left). Displacement is about 1,800 feet. 1940. Figure 38, U.S. Geological Survey Professional Paper 226. #1:/Gregory H.E. Collection/ghe00982 ID. Gregory, H.E. 982 Kane Co. Utah. Paunsaugunt Fault near Johnson Ranch, Weber Creek, Tropic Formation on east (Right). Raised above Wahweap Sandstone (left). 1940. #1:/Gregory H.E. Collection/ghe00983 ID. Gregory, H.E. 983 Garfield Co., Utah. Erosion of Cretaceous Beds in Paria Valley, east of Tropic; Wasatch Formation on Horizon. View looking east near mouth of Henderson Valley. 1940. #1:/Gregory H.E. Collection/ghe00984 ID. Gregory, H.E. 984 Kane CO., Utah, "White Throne" Remnant of Navajo Sandstone in Branch of Paria River. 1940. #1:/Gregory H.E. Collection/ghe00985 ID. Gregory, H.E. 985 Kane Co., Utah. Remnant of Navajo Sandstone on floor of Paria Valley. 1940. #1:/Gregory H.E. Collection/ghe00986 ID. Gregory, H.E. 986 Kane Co., Utah. View looking east across north end of No Man's Mesa, composed of Navajo Sandstone partly capped by Carmel Limestone. Park Wash (foreground) area drained by Kitchen Canyon Tributary TO Paria River (Middle Background). Panoramic with Number 987. 1940 #1:/Gregory H.E. Collection/ghe00987 ID. Gregory, H.E. 987 Kane Co., Utah. Junction of Deer Range and Bullrush Canyons. Highands of Navajo Sandstone (Upper Left), Park Wash lower left; Panoramic with 986. 1940. #1:/Gregory H.E. Collection/ghe00988 ID. Gregory, H.E. 988 Kane Co., Utah. View looking south from Rainbow Point, Paunsaugunt Plateau, showing position of Cretaceous formations (lower half), Upper Jurassic (Flatands, Middle distance), and Navajo Sandstone of south-facing White Cliffs Cut by Canyons. 1940. #1:/Gregory H.E. Collection/ghe00989 ID. Gregory, H.E. 989 Kane Co., Utah Averett Wash at place where it crosses the Carmel, Entrada, and Curtis formations and descends into Navajo Sandstone (Background). 1940. #1:/Gregory H.E. Collection/ghe00990 ID. Gregory, H.E. 990 Kane Co., Utah, Ledge of Gypsum (center) in the Curtis formation underlain by Entrada Sandstone. Averett Wash. 1940. #1:/Gregory H.E. Collection/ghe00991 ID. Gregory, H.E. 991 Kane Co., Utah. Potholes in Navajo Sandstone, Tank Canyon, tributary to Deer Range Canyon. 1940. #1:/Gregory H.E. Collection/ghe00992 ID. Gregory, H.E. 992 Kane Co., Utah. Sheep Creek at Head of Box Canyon. Navajo Sandstone (foreground) followed upward by Carmel and Entrada. 1940. #1:/Gregory H.E. Collection/ghe00993 ID. Gregory, H.E. 993 Kane Co., Utah. SHELL Point, Fossiliferous Tropic Shale (Top) and Winsor formation, east Side of Willis Creek. 1940. #1:/Gregory H.E. Collection/ghe00994 ID. Gregory, H.E. 994 Paunsaugunt fault at Findley Ranch. Fault follows west edge of upthrown block of Navajo sandstone capped by limestone of the Carmel formation (left sky line). West of it lie. Carmel, Entrada, and Curtis formations (left center). Displacement about 1,300 feet. Kane County, Utah. 1940. Published as figure 39 in U.S. Geological Survey. Professional paper 226. 1951. #1:/Gregory H.E. Collection/ghe00995 ID. Gregory, H.E. 995 Cliff exposing Winsor and Tropic formations. Kane County, Utah. 1940. #1:/Gregory H.E. Collection/ghe00996 ID. Gregory, H.E. 996 Fault, Navajo sandstone (right), Carmel formation (left), head of box canyon in Lick Wash. Kane County, Utah. 1940. #1:/Gregory H.E. Collection/ghe00997 ID. Gregory, H.E. 997 Skutumpah Ranch, alluvium fill approximately 30 feet deep (foreground) overlying Winsor, Curtis, and Entrada formations; Carmel and Navajo of Skutumpah terrace (background), notch (upper right) deep canyon in Navajo sandstone, the egress for Skutumpah Creek (left middle) and Mill Creek (right middle). Kane County, Utah. 1940. #1:/Gregory H.E. Collection/ghe00998 ID. Gregory, H.E. 998 Kane Co., Utah. Face of Basalt Dike, Black Knoll, Tenney Canyon. 1940. #1:/Gregory H.E. Collection/ghe00999 ID. Gregory, H.E. 999 Kane Co., Utah. Gypsum on Curtis Formation (Top) Overlying Entrada Sandstone. Gypsum Wash. 1940. #1:/Gregory H.E. Collection/ghe01000 ID. Gregory, H.E. 1000 Kane Co., Utah. Bald Knoll Volcanic Cone near head of Johnson Creek. 1940. #1:/Gregory H.E. Collection/ghe01001 ID. Gregory, H.E. 1001 Kane County, Utah. Wingate Sandstone capped by Kayenta (LEFT CENTER) and Navajo Sandstone IN White Cliffs (Headlands in Background), eastern Branch of Johnson Canyon. 1940. #1:/Gregory H.E. Collection/ghe01002 ID. Gregory, H.E. 1002 Kane Co., Utah eroded edge of Basalt flow from Bald Knoll. White Cliffs, Navajo Sandstone (Upper Right); Middle Johnson Canyon. 1940. #1:/Gregory H.E. Collection/ghe01003 ID. Gregory, H.E. 1003 Kane County, Utah View eastward across Alton Amphitheater; Floor of Tropic Shale, Other Cretaceous formations in Background. 1940. #1:/Gregory H.E. Collection/ghe01004 ID. Gregory, H.E. 1004 Kane Co., Utah, Same as 1003, Wasatch Cliffs of Paunsaugunt Plateau on Skyline. 1940. #1:/Gregory H.E. Collection/ghe01005 ID. Gregory, H.E. 1005 Garfield Co., Utah Valley of Sevier River about two miles north of Hatch: floor on stream alluvium, terraces cut from alluvial fans (left center) originating in Sunset Cliffs (Background), Lava (left center) overliesS Clays and Gravels, (of Sevier formation?), (White Spot). 1940. #1:/Gregory H.E. Collection/ghe01006 ID. Gregory, H.E. 1006 South Fork of the Sevier River south of Hatch River. Flows on alluvium along edge of fans that extend westward from the base of the Sunset Cliffs (skyline). Garfield County, Utah. 1940. Published as figure 49 in U.S. Geological Survey. Professional paper 226. 1951. #1:/Gregory H.E. Collection/ghe01007 ID. Gregory, H.E. 1007 Wilson Peak, head of Hillsdale Canyon. Wasatch limestone overlying the Kaiparowits formation. Garfield County, Utah. 1940. #1:/Gregory H.E. Collection/ghe01009 ID. Gregory, H.E. 1009 View in Hillsdale Gap in Sunset Cliffs looking east, along a fault. Garfield County, Utah. 1940 #1:/Gregory H.E. Collection/ghe01010 ID. Gregory, H.E. 1010 Kane Co. Utah view eastward from mouth of Castle Wash, upper Sevier River (foreground) and Alluvial Fans (center) to Cretaceous and Tertiary beds in Sunset Cliffs (background). 1940. #1:/Gregory H.E. Collection/ghe01011 ID. Gregory, H.E. 1011 Kane Co, Utah erosion Remants in upper (white) part of Wasatch Formation Limestone and Conglomerate. Castle Wash and upper Tributary to Sevier River. 1940. #1:/Gregory H.E. Collection/ghe01012 ID. Gregory, H.E. 1012 Kane Co, Utah erosion Remants in upper (white) part of Wasatch Formation Limestone and Conglomerate. Castle Wash and upper Tributary to Sevier River. 1940. #1:/Gregory H.E. Collection/ghe01013 ID. Gregory, H.E. 1013 Garfield Co., Utah. Walls of Alluvium along Red Creek. 1940. #1:/Gregory H.E. Collection/ghe01014 ID. Gregory, H.E. 1014 Alluvial wall of trench dug since 1920?. Post-Wasatch marls at base. Red Creek. Garfield County, Utah. 1940. #1:/Gregory H.E. Collection/ghe01015 ID. Gregory, H.E. 1015 Fossiliferous Pleistocene marls, clays, and limestone in Red Creek Valley. Garfield County, Utah. 1940. Published as figure 29 in U.S. Geological Survey. Professional paper 226. 1951 #1:/Gregory H.E. Collection/ghe01016 ID. Gregory, H.E. 1016 Unconformities in valley fill, Red Canyon. Garfield County, Utah, 1940. Published as figure 31 in U.S. Geological Survey. Professional paper 226. 1951. #1:/Gregory H.E. Collection/ghe01017 ID. Gregory, H.E. 1017 Proctor Canyon at its mouth in Sunset Cliffs; trench cut in alluvium during a single heavy storm in 1921. Garfield County, Utah. 1940 #1:/Gregory H.E. Collection/ghe01018 ID. Gregory, H.E. 1018 Castro Canyon wall showing bedded clays and lime silts. Garfield County, Utah. 1940 #1:/Gregory H.E. Collection/ghe01019 ID. Gregory, H.E. 1019 Sevier River? formation along Highway 89 between Panguitch and Hatch showing style of bedding typical of these outcrops. Garfield County, Utah. 1940. Published as figure 25 in U.S. Geological Survey. Professional paper 226. 1951. #1:/Gregory H.E. Collection/ghe01020 ID. Gregory, H.E. 1020 Volcanic conglomerate, sandstone, and sandy clays in Sevier River? Formation in road cut 2+ miles south of Hillsdale. Garfield County, Utah. 1940. Published as figure 26 in U.S. Geological Survey. Professional paper 226. 1951 #1:/Gregory H.E. Collection/ghe01021 ID. Gregory, H.E. 1021 Post-Wasatch Sevier? formation (foreground and center) capped by lavas of Sevier Plateau (horizon) at head of north fork of Limekiln Wash. Garfield County, Utah. 1940. #1:/Gregory H.E. Collection/ghe01022 ID. Gregory, H.E. 1022 Garfield Co., Utah SAME AS 1021, 3 miles westward: upper part beneath lavas; Clays at base; Sandstone and Limestone above. 1940. #1:/Gregory H.E. Collection/ghe01023 ID. Gregory, H.E. 1023 Garfield Co., Utah. Same as 1022 (upper part) Green Sandstone in columns, white, Cherty Limestone and Lava (top). 1940. #1:/Gregory H.E. Collection/ghe01024 ID. Gregory, H.E. 1024 Garfield Co., Utah. Same as 1022 (lower part), erosion features of clays and silts. 1940. #1:/Gregory H.E. Collection/ghe01025 ID. Gregory, H.E. 1025 Garfield County, Utah. Garfield Co., Utah. Same as 1022 (lower part), erosion features of clays and silts. 1940. #1:/Gregory H.E. Collection/ghe01026 ID. Gregory, H.E. 1026 Garfield Co., Utah Same as 1024. 1940. #1:/Gregory H.E. Collection/ghe01027 ID. Gregory, H.E. 1027 Garfield Co.. Utah Same as 1024. 1940 #1:/Gregory H.E. Collection/ghe01028 ID. Gregory, H.E. 1028 Iron Co., Utah. Senabkaib member of the Moenlopi Formation Upturned in a fold which involves upper Red beds (right), Coal Canyon. 1940. #1:/Gregory H.E. Collection/ghe01029 ID. Gregory, H.E. 1029 Iron Co., Utah. Senabkaib member of the Moenlopi Formation Upturned in a fold which involves upper Red beds (right), Coal Canyon. 1940. #1:/Gregory H.E. Collection/ghe01030 ID. Gregory, H.E. 1030 Iron Co., Utah. Winsor Formation beneath Dakota (upper left), Coal Canyon. 1940. #1:/Gregory H.E. Collection/ghe01031 ID. Gregory, H.E. 1031 Iron Co., Utah. Winsor Formation, two miles northeast of Horseranch Point, Zion National Monument. 1940. #1:/Gregory H.E. Collection/ghe01032 ID. Gregory, H.E. 1032 Washington Co., Utah View looking down Virgin River from Hornet Point, toward Zion National Park in distance. 1940. #1:/Gregory H.E. Collection/ghe01033 ID. Gregory, H.E. 1033 Washington Co. Utah Carmel Formation and Entrada (upper right) near mouth of Deep Creek. 1940. #1:/Gregory H.E. Collection/ghe01034 ID. Gregory, H.E. 1034 Washington Co., Utah. Straight Cliffs Sandstone, Head of OAK Creek. 1940. #1:/Gregory H.E. Collection/ghe01035 ID. Gregory, H.E. 1035 Washington Co.,Utah. Straight Cliffs Sandstone, east side of Deep Creek. 1940. #1:/Gregory H.E. Collection/ghe01036 ID. Gregory, H.E. 1036 Washington Co., Utah Straight Cliffs Sandstone, Coquina at upper left, near juction of Deep and Crystal Creeks. 1940. #1:/Gregory H.E. Collection/ghe01037 ID. Gregory, H.E. 1037 Washington Co., Utah. Upper beds of Tropic Formation near head of Deep Creek. 1940. #1:/Gregory H.E. Collection/ghe01039 ID. Gregory, H.E. 1039 Washington Co., Utah. Lower Red beds of Moenkopi Formation near mouth of Taylor Creek, flat land (left center) on downthrown side of Hurricane Fault, Kanarville. 1940. #1:/Gregory H.E. Collection/ghe01040 ID. Gregory, H.E. 1040 Washington Co., Utah. Erosion features near the head of Taylor Creek, towers and walls of Navajo Sandstone overlaid by Camel Limestone and Lavas (top right and center). 1940. #1:/Gregory H.E. Collection/ghe01041 ID. Gregory, H.E. 1041 Washington Co., Utah. Same as 1040. Walls and Towers of Navajo Sandstone; Chinle Formation on Slopes. 1940. #1:/Gregory H.E. Collection/ghe01042 ID. Gregory, H.E. 1042 Washington Co., Utah. Smith Mesa viewed from the northeast, Mesa top Developed on Springdale member of the Chinle Formation; upper Chinle and Navajo (right), La Verkin Canyon (left),Hurrican Cliffs (on Skyland). 1940. #1:/Gregory H.E. Collection/ghe01043 ID. Gregory, H.E. 1043 Washington Co., Utah. View southeastward across North Creek to Couger Mountain; Towers IN Zion Park (top left) and Smithsonian Butte (top right); Canyon outlined by Shinarump Conglomerate. 1940. #1:/Gregory H.E. Collection/ghe01044 ID. Gregory, H.E. 1044 Washington Co., Utah. Spendlive Knoll, Volcanic Cone on Navajo Sandstone, Head of Top Valley. 1940. #1:/Gregory H.E. Collection/ghe01045 ID. Gregory, H.E. 1045 Washington Co., Utah. Folds in Moenkopi Formation, Taylors Creek. 1940. #1:/Gregory H.E. Collection/ghe01046 ID. Gregory, H.E. 1046 Washington Co., Utah. Smnabkaib Member (left) and upper Red beds of Moenkopi Formation. Taylor Creek. 1940. #1:/Gregory H.E. Collection/ghe01047 ID. Gregory, H.E. 1047 Washington Co., Utah. Virgin Limestone and Member and Middle Red Beds of the Moenkopi Formation, Taylor Creek. 1940. #1:/Gregory H.E. Collection/ghe01048 ID. Gregory, H.E. 1048 Washington Co., Utah Virgin Limestone Member (top) and lower Red beds of the Moenkopi Formation. Taylor Creek. 1940. #1:/Gregory H.E. Collection/ghe01049 ID. Gregory, H.E. 1049 Washington Co., Utah. Petrified Forest Member of the Chinle Formation, Taylor Creek. 1940. #1:/Gregory H.E. Collection/ghe01050 ID. Gregory, H.E. 1050 Washington Co., Utah. white Sandstone beds between the Springdale and Petrified Forest Member of the Chinle, Taylor Creek. 1940. #1:/Gregory H.E. Collection/ghe01051 ID. Gregory, H.E. 1051 Washington Co., Utah. Moenkopi Formation showing, in succession Shnabkaib, lower Red, Virgin Limestone (Double Ridge), Middle Red, Shnabkaib, and upper Red Member; Shinarump Conglomerate (Crest and top of Cuesta), Chinle Including Springdale Member (Low Cliff, upper left); Taylor Creek. 1940. #1:/Gregory H.E. Collection/ghe01052 ID. Gregory, H.E. 1052 Washington Co., Utah. Ridge of Shinarump Conglomerate (center) extemding from Taylor Creek to Camp Creek; Moenkopi (Cliffs and Slopes) at left, Chinle Valley at right. 1940. #1:/Gregory H.E. Collection/ghe01053 ID. Gregory, H.E. 1053 Millard Co., Utah. Valley of east fork of Sevier River below the mouth of Podunk Creek. Floor of Valley, Kaiparowitz Formation. Valley Sides in Wasatch Formation. 1940? #1:/Gregory H.E. Collection/ghe01054 ID. Gregory, H.E. 1054 Garfield County Utah. Castro Bluff; Head of Castro Canyon southwest edge of Sevier Plateau. Acidic lava underlain by Sevier (?) Formation. 1941. #1:/Gregory H.E. Collection/ghe01055 ID. Gregory, H.E. 1055 Garfield County. Same as no, 1054 shows eroded top of Sevier Plateau. 1941. #1:/Gregory H.E. Collection/ghe01056 ID. Gregory, H.E. 1056 Garfield County. Castro Bluff, detail thin beds (upper) in Sevier (?) Formation. 1941. #1:/Gregory H.E. Collection/ghe01057 ID. Gregory, H.E. 1057 Garfield County. Bluff, detail thick lava beds in Sevier (?) formation. 1941. #1:/Gregory H.E. Collection/ghe01058 ID. Gregory, H.E. 1058 Garfield County. Castro Bluff, detail pumice conglomerate in Sevier Formation. 1941. #1:/Gregory H.E. Collection/ghe01059 ID. Gregory, H.E. 1059 Garfield County. Castro Bluff, view looking westward from its base. Terrace developed in the Sevier (?) Formation at the top of the Wasatch Formation. 1941. #1:/Gregory H.E. Collection/ghe01060 ID. Gregory, H.E. 1060 Iron County Utah. General view of eroded Pink Cliffs (Wasatch formation) near Cedar Breaks. 1941. #1:/Gregory H.E. Collection/ghe01061 ID. Gregory, H.E. 1061 Washington County, Utah. View looking north from Paria (?) Knoll (lava) near DeadMan Gulch, showing tilted strata east of Hurricane Cliffs (extreme left). Virgin member of Moenkopi, Shinarump Conglomerate and Chinle sandstones make hogbacks. Horse ranch knoll, Navajo and Carmel in upper right. 1941. #1:/Gregory H.E. Collection/ghe01063 ID. Gregory, H.E. 1063 Iron County, Utah. Straight Cliffs sandstone (Cretaceous) Wall of Ashdown Canyon. 1941. #1:/Gregory H.E. Collection/ghe01064 ID. Gregory, H.E. 1064 Iron County. Utah. Natural bridge near top of wall of Ashdown Canyon. 1941. #1:/Gregory H.E. Collection/ghe01065 ID. Gregory, H.E. 1065 Iron County, Utah. Same as no. 1064. View from below. 1941. #1:/Gregory H.E. Collection/ghe01066 ID. Gregory, H.E. 1066 Iron County, Utah. Top of Brian Head (11,280 feet) showing fracture of rhyolite by frost. 1941. #1:/Gregory H.E. Collection/ghe01067 ID. Gregory, H.E. 1067 Iron County, Utah. Top of ridge near head of Laoder Valley showing frost work and vegetation on Markagrunt Plateau at altitudes between 10,000 and 11,000 feet. 1941. #1:/Gregory H.E. Collection/ghe01068 ID. Gregory, H.E. 1068 Iron County, Utah. Volcanic Conglomerate at the base of a succession of lavas on the cliff face of Brian Head. 1941. #1:/Gregory H.E. Collection/ghe01069 ID. Gregory, H.E. 1069 Iron County Utah. Kaiparowitz formation near Southwest corner of Cedar Breaks National Monument. 1941. #1:/Gregory H.E. Collection/ghe01070 ID. Gregory, H.E. 1070 Iron County, Utah. Kaiparowits formation on Cedar City, Cedar road above Wood's Ranch. 1941. #1:/Gregory H.E. Collection/ghe01071 ID. Gregory, H.E. 1071 Iron County Utah. Glacial till, Castle Creek below Sidney Valley. Top of Markagunt Plateau. 1941. #1:/Gregory H.E. Collection/ghe01072 ID. Gregory, H.E. 1072 Iron County, Utah. Sidney Valley. Ponds and mounds produced by glaciation. 1941. #1:/Gregory H.E. Collection/ghe01073 ID. Gregory, H.E. 1073 Iron County, Utah. Same as no. 1072. Sidney Valley. Ponds and mounds produced by glaciation. 1941. #1:/Gregory H.E. Collection/ghe01074 ID. Gregory, H.E. 1074 Iron County, Utah. Talus of blocks from basalt sheet. Square Mountain. 1941. #1:/Gregory H.E. Collection/ghe01075 ID. Gregory, H.E. 1075 Iron County. Utah Mouth of Camp Creek, Resistant linestones of lowest Triassic Make walls. 1941. #1:/Gregory H.E. Collection/ghe01076 ID. Gregory, H.E. 1076 Iron County, Utah. Contact of Triassic and Persian (beds in wall wrinkled at base). Cherty limestone lower left. Camp. 1941. #1:/Gregory H.E. Collection/ghe01077 ID. Gregory, H.E. 1077 Washington County, Utah. Conglomerates, base of Timpoweap member of the Moenkopi. Tarper. 1941. #1:/Gregory H.E. Collection/ghe01078 ID. Gregory, H.E. 1078 Iron County, Utah. Surface of Kalob Terrace looking southeast near Pryor Knoll. 1941. #1:/Gregory H.E. Collection/ghe01079 ID. Gregory, H.E. 1079 Iron County, Utah. Same as 1078, Looking northeast to edge of Markagunt Plateau. 1941. #1:/Gregory H.E. Collection/ghe01080 ID. Gregory, H.E. 1080 Iron County, Utah. Same as 1078, Looking north across Coal Creek Canyon Sugar Loaf on middle skyline. 1941. #1:/Gregory H.E. Collection/ghe01081 ID. Gregory, H.E. 1081 Iron County, Utah. Kaiparowits Formation Cretaceaus. Conglomerate (pinnacles) in contact with bedded arkosic sandstone. Parowan Canyon. 1941. #1:/Gregory H.E. Collection/ghe01082 ID. Gregory, H.E. 1082 Iron County, Utah. Same as no. 1081. Not unconformity. Kaiparowits Formation Cretaceaus. Conglomerate (pinnacles) in contact with bedded arkosic sandstone. Parowan Canyon. 1941. #1:/Gregory H.E. Collection/ghe01083 ID. Gregory, H.E. 1083 Iron County Same as no, 1081. Detail contact of conglomerate (foreground) and rough bedded, carbonaceous sandstone above. 1941. #1:/Gregory H.E. Collection/ghe01084 ID. Gregory, H.E. 1084 Iron County. Utah Same as 1083. Detail contact of conglomerate (foreground) and rough bedded, carbonaceous sandstone above. 1941. #1:/Gregory H.E. Collection/ghe01085 ID. Gregory, H.E. 1085 Iron County, Utah. Same as 1084. Conglomerate in Kaiparowits Formation (foreground) overlaid in turn by bedded sandstone and Wasatch Limestone. Parowan Canyon. 1941. #1:/Gregory H.E. Collection/ghe01086 ID. Gregory, H.E. 1086 Iron County, Utah. Kalparowits Formation unconfomable below Wasatch Limestone south, foot of Parowan Canyon. 1941. #1:/Gregory H.E. Collection/ghe01087 ID. Gregory, H.E. 1087 Iron County, Utah. Undifferentiated Cretaceous formation near mouth of Parowan Canyon. cc 1941. #1:/Gregory H.E. Collection/ghe01088 ID. Gregory, H.E. 1088 Iron County, Utah. Same as 1087. cc 1941 #1:/Gregory H.E. Collection/ghe01089 ID. Gregory, H.E. 1089 Iron County, Utah. Fault, Wasatch limestone (extreme right) in horizontal contact with Undifferentiated Cretaceous. Parowan Canyon. #1:/Gregory H.E. Collection/ghe01090 ID. Gregory, H.E. 1090 Iron County, Utah. Fault, Wasatch formation (left); Undifferentiated Cretaceous (right). Parowan Canyon. n.d. #1:/Gregory H.E. Collection/ghe01091 ID. Gregory, H.E. 1091 Iron County, Utah. Summit Ridge. View looking south across Braffitte Canyon. n.d. #1:/Gregory H.E. Collection/ghe01092 ID. Gregory, H.E. 1092 Iron County, Utah. Summitt Ridge. Undissected highland 9000 feet near head of Summit Canyon. n.d. #1:/Gregory H.E. Collection/ghe01093 ID. Gregory, H.E. 1093 Iron County, Utah. Summit Ridge. Pond supplied chiefly by melting snow. n.d. #1:/Gregory H.E. Collection/ghe01094 ID. Gregory, H.E. 1094 Iron County Utah Same as no. 1095. Iron County Utah. Sugar loaf on outlier of Markagunt Plateau on divide between Parowan and Coal Creek drainage areas. n.d. #1:/Gregory H.E. Collection/ghe01095 ID. Gregory, H.E. 1095 Iron County Utah. Sugar loaf on outlier of Markagunt Plateau on divide between Parowan and Coal Creek drainage areas. n.d. #1:/Gregory H.E. Collection/ghe01096 ID. Gregory, H.E. 1096 Iron County Utah. Surface of Kolob Terrace near Pryor Knoll. n.d. #1:/Gregory H.E. Collection/ghe01097 ID. Gregory, H.E. 1097 Iron County Utah. Westward tilting Moenkopi strata; Timpoweap, lower red, Virgin and Shnabkaib members. Mouth of Kanarra Canyon. n.d. #1:/Gregory H.E. Collection/ghe01098 ID. Gregory, H.E. 1098 Iron County Utah. Hurricane Cliffs looking north across mouth of Swayne. n.d. #1:/Gregory H.E. Collection/ghe01099 ID. Gregory, H.E. 1099 Iron County Utah. Sidney Valley near head of Castle Creek. Ponds and kamelike accumulations resulting from glaciation. Ridges of acidic lava in upper left. 1942. #1:/Gregory H.E. Collection/ghe01100 ID. Gregory, H.E. 1100 Iron County Utah. Same as no, 1099 Iron County Utah. Sidney Valley near head of Castle Creek. Ponds and kamelike accumulations resulting from glaciation. Ridges of acidic lava in upper left. 1942. #1:/Gregory H.E. Collection/ghe01101 ID. Gregory, H.E. 1101 Iron County Utah Surface of Kolob Terrace near head of Crystal Creek. Developed on Tropic shale. View looking north from near head of South across Coal Canyon Log Hollow fault, Kaiparowits Formation Cretaceous on uptnrown side (middle and right) in contact with Tertiary (left). Estimated displacement 700 feet. Bowery Canyon. 1942. #1:/Gregory H.E. Collection/ghe01103 ID. Gregory, H.E. 1103 View looking north from near head of South Creek across Coal Canyon. Iron County, Utah. 1942. #1:/Gregory H.E. Collection/ghe01104 ID. Gregory, H.E. 1104 Log Hollow Fault, Kaiparowits Formation Cretaceous on upthrown side (middle and right) in contact with Tertiary (left). Estimated displacement 700 feet. Bowery Canyon, 1942. #1:/Gregory H.E. Collection/ghe01105 ID. Gregory, H.E. 1105 Iron County Utah. Recent trenching of valley fill of stratified sands and clay, upper part of Spring Creek Canyon. 1942. #1:/Gregory H.E. Collection/ghe01106 ID. Gregory, H.E. 1106 Iron County Utah. Same as no. 1105. Coarse debris near canyon mouth. Iron County Utah. Recent trenching of valley fill of stratified sands and clay, upper part of Spring Creek Canyon. 1942. #1:/Gregory H.E. Collection/ghe01107 ID. Gregory, H.E. 1107 Iron County Utah Surface of the Piute Highlands looking north from Applegate cliff. 1942. #1:/Gregory H.E. Collection/ghe01108 ID. Gregory, H.E. 1108 Iron County Utah. Pond confined by a glacial moraine. Dry Lakes road, 1942. #1:/Gregory H.E. Collection/ghe01109 ID. Gregory, H.E. 1109 Iron County Utah. Kaiparowitz formation (Cretaceous) overlain by the Wasatch Tertiary, Bowery Canyon. 1942. #1:/Gregory H.E. Collection/ghe01110 ID. Gregory, H.E. 1110 Iron County Utah. Same as #1109. 1942. #1:/Gregory H.E. Collection/ghe01111 ID. Gregory, H.E. 1111 Iron County. Same as #1109. Iron County Utah. Kaiparowitz formation (Cretaceous) overlain by the Wasatch Tertiary, Bowery Canyon. 1942. #1:/Gregory H.E. Collection/ghe01112 ID. Gregory, H.E. 1112 Iron County Utah. Conglomerate and underlying arkosic sendstcne, Kaiparcwits Formation, Bowery Canyon, 1942. #1:/Gregory H.E. Collection/ghe01113 ID. Gregory, H.E. 1113 Iron County. Braffit Point, Mass of conglomerate in the Kaiparowits Formation, branch of Parawan Canyon, 1942. #1:/Gregory H.E. Collection/ghe01114 ID. Gregory, H.E. 1114 Iron County. Camel formation. Coal Canyon, 1942. #1:/Gregory H.E. Collection/ghe01115 ID. Gregory, H.E. 1115 Iron County. Same as 1114. Iron County. Camel formation. Coal Canyon, 1942. #1:/Gregory H.E. Collection/ghe01116 ID. Gregory, H.E. 1116 Iron County Utah. Tilted Cretaceous strata that terminate westward (left) at the Hurricane fault. Canyon southeast of summit, 1942. #1:/Gregory H.E. Collection/ghe01117 ID. Gregory, H.E. 1117 Iron County Utah. Same as #116. Wall of Fiddler Canyon. 1942. #1:/Gregory H.E. Collection/ghe01118 ID. Gregory, H.E. 1118 Iron County Utah. Black Ledge. Cliff of rhyolite that for about 20 miles forms the rim of the Markagunt Plateau. The escarpment is the upthrown side of a fault concealed by the talus. Hoosier Lake, 1942. #1:/Gregory H.E. Collection/ghe01119 ID. Gregory, H.E. 1119 Iron County. Same as #1118. South of Hoosier Lake. Iron County Utah. Black Ledge. Cliff of rhyolite that for about 20 miles forms the rim of the Markagunt Plateau. The escarpment is the upthrown side of a fault concealed by the talus. Hoosier Lake, 1942. #1:/Gregory H.E. Collection/ghe01120 ID. Gregory, H.E. 1120 Iron County Utah. Moenkopi fomation (Shnabkaib and upper red members) Shinarump Conglomerate, and Chinle Formation, all tilted steeply eastward, (right). Gulch near the mouth of Coal Canyon. 1942. #1:/Gregory H.E. Collection/ghe01121 ID. Gregory, H.E. 1121 Iron County Utah. Shnabkaib Member of the Moenkopi Formation - chiefly gypsiferous beds - uptilted in the Kanarra fold. Branch of Shurtz Creek, 1942. #1:/Gregory H.E. Collection/ghe01122 ID. Gregory, H.E. 1122 Iron County Utah. Virgin limestone (left) and Shnabicaib member of the Moenkopi in vertical position. Kanarra Canyon, 1942. #1:/Gregory H.E. Collection/ghe01123 ID. Gregory, H.E. 1123 Iron County Utah Hancock Peak, Volcanic core, 1942. #1:/Gregory H.E. Collection/ghe01124 ID. Gregory, H.E. 1124 Iron County Utah. Termination of a basalt flow from Hancock Peak, over-riding Wasatch limestone, left. Branch of Mammoth Creek, 1942. #1:/Gregory H.E. Collection/ghe01125 ID. Gregory, H.E. 1125 Iron County Utah. Basalt flows from Houston Mountain near their western termination. 1942 #1:/Gregory H.E. Collection/ghe01126 ID. Gregory, H.E. 1126 Iron County Utah. Face of Hurricane Cliffs between Kanarra and Murie Creeks. Westward dipping lower Moenkopi strata. Edge of South Hills (left center), Square Mountain (left distance), 1942. #1:/Gregory H.E. Collection/ghe01127 ID. Gregory, H.E. 1127 Iron County Utah. High level gravels (Pliocene?). Gaps Canyon wall at mouth of Coal Creek Canyon. 1942. #1:/Gregory H.E. Collection/ghe01128 ID. Gregory, H.E. 1128 Iron County Utah. Moenkopi strata upturned in Kanarra fold. Virgin limestone (left) and Shnabkaib member (middle). 1942. #1:/Gregory H.E. Collection/ghe01129 ID. Gregory, H.E. 1129 Garfield County Sevier fault, mouth of Red Canyon. Wasatch (right) basalt (left & top) 1942. #1:/Gregory H.E. Collection/ghe01130 ID. Gregory, H.E. 1130 Garfield County Utah. Brian Head formation capped by lava. Branch of Lime-kiln Canyon. #1:/Gregory H.E. Collection/ghe01131 ID. Gregory, H.E. 1131 Iron County Utah Surface of Kolob Terrace developed on Cretaceous strata, three Knolls (basalt) on skyline, 1942. #1:/Gregory H.E. Collection/ghe01132 ID. Gregory, H.E. 1132 Iron County Utah. View looking northeast across Kolob Terrace. Basalt (foreground), Cretaceous trenched by Crystal Creek (middle) Pink Cliffs-Wasatch (skyline), lower east slope of Black Mtn (left), "The Gap", twin peaks(right) south of Navajo Lake. 1942. #1:/Gregory H.E. Collection/ghe01133 ID. Gregory, H.E. 1133 Iron County, Utah. Strata in Squaw Creek valley. Triassic (foreground), Navajo (first cliff), Upper Jurassic (white rocks)(center), Cretaceous (on skyline) Lone Tree Mountain (Upper left), Photographic negative presented by H.E. Thomas, 1942. #1:/Gregory H.E. Collection/ghe01134 ID. Gregory, H.E. 1134 Iron County. Black Mtn. culminating in Richardson Peak (alt. 9,900'), view from southwest. Eroded crater and extensive basaltic flows overlying Cretaceous and Tertiary sediments. View looking northeast edge of Kolob Terrace, 1942. #1:/Gregory H.E. Collection/ghe01135 ID. Gregory, H.E. 1135 Iron County Utah Pryer Knoll, eroded basaltic cone and lava flows over Cretaceous rocks. View northwest. Western edge of Kolob Terrace, Behind the yellow pines are the cliffs at the head of the westward flowing Shurtz Creek. 1942. #1:/Gregory H.E. Collection/ghe01136 ID. Gregory, H.E. 1136 Iron County Utah. View looking northeast across Kolob Terrace developed on Cretaceous strata. Pink Cliffs Tertiory (skyline), Black Mountain Volcano (upper left). 1942. #1:/Gregory H.E. Collection/ghe01137 ID. Gregory, H.E. 1137 Iron County Utah. Piute Highlands. View northeast across Parowan and Benson Canyons from base of Applegate ridge. Rim of Markagunt Plateau (middle skyline); Knob and ridges of Wasatch (middle distance). Rhyolite foreground. 1942. #1:/Gregory H.E. Collection/ghe01138 ID. Gregory, H.E. 1138 Iron County Utah Same as 1137, looking northwest. Iron County Utah. Piute Highlands. View northeast across Parowan and Benson Canyons from base of Applegate ridge. Rim of Markagunt Plateau (middle skyline); Knob and ridges of Wasatch (middle distance). Rhyolite foreground. 1942. #1:/Gregory H.E. Collection/ghe01139 ID. Gregory, H.E. 1139 Iron County Utah. Piute Highlands. View south from Applegate Ridge across upper Submit Creek. Wasatch in Sugar Loaf Peak (upper left); rhyolite in Summit Ridge, middle skyline; Cretaceous foreground. 1942. #1:/Gregory H.E. Collection/ghe01140 ID. Gregory, H.E. 1140 Iron County Utah. Piute Highlands. View north from near the base of Eagle Peak across branches of Summit Creek. Parowan Creek to snow capped Tushar Mtns. (skyline); rhyolite and Cretaceous in foreground; Cretaceous, Tertiary and lavas beyond. 1942. #1:/Gregory H.E. Collection/ghe01141 ID. Gregory, H.E. 1141 Iron County Utah. Piute Highlands. Glacial Lake arid moraine, Moseman (Dry Lakes) Valley. 1942. #1:/Gregory H.E. Collection/ghe01142 ID. Gregory, H.E. 1142 Iron County Utah Lake like 1141, about half mile down valley. Iron County Utah. Piute Highlands. Glacial Lake arid moraine, Moseman (Dry Lakes) Valley. 1942. #1:/Gregory H.E. Collection/ghe01143 ID. Gregory, H.E. 1143 Iron County Utah. Conglomerate within the Wasatch formation (top and bottom), Bowery Canyon. 1942. #1:/Gregory H.E. Collection/ghe01144 ID. Gregory, H.E. 1144 Iron County Utah. Fault contact of Carmel (right) and Curtis (left). Coal Canyon above the mouth of Rocky Hollow. 1942. #1:/Gregory H.E. Collection/ghe01145 ID. Gregory, H.E. 1145 Iron County Utah. Cretaceous strata, Undifferentiated, near mouth of Parowan Canyon. 1942. #1:/Gregory H.E. Collection/ghe01146 ID. Gregory, H.E. 1146 Iron County Utah. Hurricane Cliffs, formed by westward dipping Moenkopi strata involved in the Kanara fold. Hurricane fault passes along the base and through the valley of Muries Creek (left); thick alluvium on the downthrown block (foreground). 1942. #1:/Gregory H.E. Collection/ghe01147 ID. Gregory, H.E. 1147 Iron County. Same as #1146, between Murie and Kanara Creeks. Jurassic and younger strata. #1:/Gregory H.E. Collection/ghe01148 ID. Gregory, H.E. 1148 Iron County Utah. View south from the base of Horseranch Mountain, across the three deep canyon branches of Taylor . Timber Top Mesa (middle skyline; Navajo sandstone (in walls); Carmel (general surface); Entrada (left center); Smith Meea, Triassic rocks (upper right); towers of Zion National Park (upper left). 1942. #1:/Gregory H.E. Collection/ghe01149 ID. Gregory, H.E. 1149 Iron County Utah. Fault near the mouth of Maple Canyon looking north, upthrown block at left. 1942. #1:/Gregory H.E. Collection/ghe01150 ID. Gregory, H.E. 1150 Iron County Utah, Moenkopi beds upturned in the Kanara fold and broken by a fault. Lawrence Canyon. 1942. #1:/Gregory H.E. Collection/ghe01151 ID. Gregory, H.E. 1151 Iron County Utah, Moenkopi Formation, Shnabkaib and upper red members. Chinle (upper right), knob of Shinarump offset by faulting (center skyline). Near mouth of Coal Canyon, 1942. #1:/Gregory H.E. Collection/ghe01152 ID. Gregory, H.E. 1152 Parunuweap formation, thin bedded phase; overlies upturned Moenkopi, Lawrence Canyon. 1942. #1:/Gregory H.E. Collection/ghe01153 ID. Gregory, H.E. 1153 Washington County, Utah. Parunuweap Formation, covered by basalt flow. LaVerkin Ganyon. 1942. #1:/Gregory H.E. Collection/ghe01154 ID. Gregory, H.E. 1154 Washington County. Panamweap Formation, covered by basalt flow. LaVerkin Canyon, 1942. #1:/Gregory H.E. Collection/ghe01155 ID. Gregory, H.E. 1155 Washington County Parunuweap Formation, overlying eroded Moenkopi strata. Federal highway 15, Virgin River Valley, near Grafton. 1942. #1:/Gregory H.E. Collection/ghe01156 ID. Gregory, H.E. 1156 Washington County Parunuweap Formation, overlying eroded Moenkopi strata. Federal highway 15, Virgin River Valley, near Grafton. 1942. #1:/Gregory H.E. Collection/ghe01157 ID. Gregory, H.E. 1157 Washington County. Parunuweap Formation overlying Moenkopi; on divide between tributaries to Virgin River near Grafton. 1942. #1:/Gregory H.E. Collection/ghe01158 ID. Gregory, H.E. 1158 Iron County, Utah. Undifferentiated Cretaceous, Parowan Canyon below the mouth of Bowery Canyon. 1942. #1:/Gregory H.E. Collection/ghe01159 ID. Gregory, H.E. 1159 Iron County, Utah. Conglomerate near the base of the Kaiparowlts Formation, Parowan Ganyon, 1942. #1:/Gregory H.E. Collection/ghe01160 ID. Gregory, H.E. 1160 Garfield County. Erosion surface developed on Brian Head formation; downthrow side of Sevier fault. Rim of Sevier Plateau on skyline. Limekiln Gulch, 1942. #1:/Gregory H.E. Collection/ghe01161 ID. Gregory, H.E. 1161 Washington County, Utah. Part of Kolob volcanic field looking southeast across canyons of Virgin River to Moccsin Terrace (skyline), Lava (foreground) has buried rough topography developed on Chinle and Navajo. Above it rises island-like Pine Valley Peak of Navajo sandstone (upper right). Towers of Zion National Park (upper left). 1942. #1:/Gregory H.E. Collection/ghe01162 ID. Gregory, H.E. 1162 Washington County. Parunuweap Formation, Pliocene?, overlying Moenkopi beds (concealed by talus) and capped by basalt. Lower LaVerkin Canyon. 1943. #1:/Gregory H.E. Collection/ghe01163 ID. Gregory, H.E. 1163 Iron County. Parunuweap Formation (Pliocene?) weakly consolidated sands and silts. Branch of Coal Creek, 1943. #1:/Gregory H.E. Collection/ghe01164 ID. Gregory, H.E. 1164 Washington County, Utah. Conglomerate at the base of the Timpoweap member of the Moenkopi Formation. Mouth of Taylor Canyon, 1943. #1:/Gregory H.E. Collection/ghe01165 ID. Gregory, H.E. 1165 Washington County, Utah. (Panorama) Western edge of Zion National Monument looking east across the Hurricane Cliffs, from a point on the New Harmony road, showing Permian (Kaibab), Triassic (Moenkopi Shinarump, Chinle), and Jurassic (Navajo, Carmel, Entrada) strata. Lava capped Horseranch Mountain (upper left) buttresses at head of Taylor Creek, (upper center), Timbertop Mesa, (upper right), 1943. #1:/Gregory H.E. Collection/ghe01166 ID. Gregory, H.E. 1166 Washington County Utah. Head of middle fork of Taylor Creek, Canyon walls of Navajo sandstone 1600+ feet high. 1943. #1:/Gregory H.E. Collection/ghe01167 ID. Gregory, H.E. 1167 Cretaceous shales (Tropic formation). Antimont Canyon. Garfield County, Utah. 1943. #1:/Gregory H.E. Collection/ghe01168 ID. Gregory, H.E. 1168 View looking northeast across Antimony Canyon, Cretaceous strata (foreground and middle distance) below igneous conglomerate and acidic lavas that form the surface of Aquarius Plateau, Garfield County, Utah. 1943. #1:/Gregory H.E. Collection/ghe01169 ID. Gregory, H.E. 1169 Entrada sandstone - regular bedded shaly phase overlain by Undifferentiated Curtis and Windsor Formations. Antimony Canyon, Garfield Co., Utah. 1943. #1:/Gregory H.E. Collection/ghe01170 ID. Gregory, H.E. 1170 Erosion features in Entrada sandstone. Antimony Canyon, Garfield County, Utah. 1943. #1:/Gregory H.E. Collection/ghe01171 ID. Gregory, H.E. 1171 Same as #1170 showing details. Erosion features in Entrada sandstone. Antimony Canyon, Garfield County, Utah. 1943. #1:/Gregory H.E. Collection/ghe01172 ID. Gregory, H.E. 1172 Brian Head Formation capped by lava (rhyolite?). Cliff on upthrown side of Paunsaugunt fault. East fork of Sevier River near tht mouth of Deer Creek. Garfield County, Utah. 1943. #1:/Gregory H.E. Collection/ghe01173 ID. Gregory, H.E. 1173 Brian Head formation, upper part, above it, acidic lavas. Black Canyon, east of Sevier Garfield County, Utah, 1943. #1:/Gregory H.E. Collection/ghe01174 ID. Gregory, H.E. 1174 Detail of Brian Head formation shown in #1173. 1943. #1:/Gregory H.E. Collection/ghe01175 ID. Gregory, H.E. 1175 Glaciated surface showing roche moutonee: Glade in spruce forest at top of Aquarius Plateau at altitude of 10,800 feet. Near the head of Antimony Creek, Garfield County, Utah. 1943. #1:/Gregory H.E. Collection/ghe01176 ID. Gregory, H.E. 1176 View looking north across Casto Canyon toward the face of the Sevier Plateau. Slope of Brian Head Formation beneath gravels (foreground) and in steep white slope (middle distance) is capped by igneous conglomerates and lavas. Garfield County, Utah, 1943. #1:/Gregory H.E. Collection/ghe01177 ID. Gregory, H.E. 1177 General view of the Brian Head Formation on the rim of the Sevier Plateau at Bluff. Garfield County, Utah. 1943. #1:/Gregory H.E. Collection/ghe01178 ID. Gregory, H.E. 1178 Ridge near the junction of the Paunsaugunt and the Sevier Plateaus. Brian Head formation (foreground) overlying Wasatch limestone concealed by gravel in adjacent lowlands. Garfield County, Utah. 1943. #1:/Gregory H.E. Collection/ghe01179 ID. Gregory, H.E. 1179 Detailed view of pumice conglomerate In the Brian Head formation, Castro Bluff, Garfield County, Utah, 1943. #1:/Gregory H.E. Collection/ghe01180 ID. Gregory, H.E. 1180 Surface of Markagunt Plateau looking west from the head of Deedy Hollow. Coated with gravel from decomposed Igneous conglomerates and rhyollte. Garfield County, Utah, 1943. #1:/Gregory H.E. Collection/ghe01181 ID. Gregory, H.E. 1181 Little valleys near the head of Pole Creek. Lower Brian Head Formation capped by decomposed igneous conglomerate. Garfield County, Utah. 1943. #1:/Gregory H.E. Collection/ghe01182 ID. Gregory, H.E. 1182 Brian Head formation in the walls of Panguitch Canyon near power house. Garfield County, Utah. 1943. #1:/Gregory H.E. Collection/ghe01183 ID. Gregory, H.E. 1183 Upper Brian Head formation near the mouth of Deedy Hollow. Garfield County, Utah. 1943. #1:/Gregory H.E. Collection/ghe01184 ID. Gregory, H.E. 1184 Lower Brian Head formation ("white Wasatch") near mouth of Castle Creek. Garfield County, Utah. 1943. #1:/Gregory H.E. Collection/ghe01185 ID. Gregory, H.E. 1185 South sink of Duck . Entire stream enters hole in Wasatch limestone. Garfield County, Utah. 1943. #1:/Gregory H.E. Collection/ghe01186 ID. Gregory, H.E. 1186 End of recent basalt flow at the race track, Panguitch Lake. Garfield County, Utah. 1943. #1:/Gregory H.E. Collection/ghe01187 ID. Gregory, H.E. 1187 Surface of recent basalt flow north of Duck Creek sinks. Garfield County, Utah. 1943. #1:/Gregory H.E. Collection/ghe01188 ID. Gregory, H.E. 1188 Rock Creek Canyon. Lower part of wall Brian Head formation; upper part acient basalt. Garfield County, Utah. 1943. #1:/Gregory H.E. Collection/ghe01189 ID. Gregory, H.E. 1189 Chinle formation - Petrified forest member - and upper Chinle beds (upper left). Branch of Road Canyon. Kane County, Utah. 1943. #1:/Gregory H.E. Collection/ghe01190 ID. Gregory, H.E. 1190 Chinle formation - Petrified Forest member. Head of Fossil Wood Creek. Kane County, Utah 1943. #1:/Gregory H.E. Collection/ghe01191 ID. Gregory, H.E. 1191 Same as 1190. Kane County, Utah. 1943. #1:/Gregory H.E. Collection/ghe01192 ID. Gregory, H.E. 1192 Chinle Formation 2 miles northwest abandoned village of Paria. Kane County, Utah. 1943. #1:/Gregory H.E. Collection/ghe01193 ID. Gregory, H.E. 1193 Chinle formation - upper red beds near mouth of Boxelder Canyon. Kane County, Utah. 1943. #1:/Gregory H.E. Collection/ghe01194 ID. Gregory, H.E. 1194 Chinle formation - upper red beds capped by remnants of Wingate sandstone, Five Pines Wash. Kane County, Utah. n.d. #1:/Gregory H.E. Collection/ghe01195 ID. Gregory, H.E. 1195 Wingate sandstone - includes bed of limestone. Wall of Flood Canyon. Kane County, Utah. n.d. #1:/Gregory H.E. Collection/ghe01196 ID. Gregory, H.E. 1196 Same as #1195. Johnson Lakes Wingate sandstone - includes bed of limestone. Wall of Flood Canyon. Kane County, Utah. n.d. #1:/Gregory H.E. Collection/ghe01197 ID. Gregory, H.E. 1197 Contact of Kayenta formation (foreground) and Navajo sandstone. Park Wash above the mouth of Five Pines Wash. Kane County, Utah. n.d. #1:/Gregory H.E. Collection/ghe01198 ID. Gregory, H.E. 1198 Same as #1197 #1:/Gregory H.E. Collection/ghe01199 ID. Gregory, H.E. 1199 Navajo Sandstone north end of No Mans Mesa, Kane County, Utah. n.d. #1:/Gregory H.E. Collection/ghe01200 ID. Gregory, H.E. 1200 Moenkopi formation; Shnabkaib member (lower part) upper red sandstone (upper middle); Shinarump conglomerate (top). East side of Seamans Wash, Kane County, Utah. 1944. #1:/Gregory H.E. Collection/ghe01201 ID. Gregory, H.E. 1201 Unconformity between Moenkopi Formation (lower part) and Shinarump Conglomerate. Upper Chinle beds, middle top. Near mouth of Road Canyon, Kane County, Utah. 1944. #1:/Gregory H.E. Collection/ghe01202 ID. Gregory, H.E. 1202 Valley fill trenched by stream since 1900, Lower Flood Canyon, Kane County, Utah. 1944. #1:/Gregory H.E. Collection/ghe01203 ID. Gregory, H.E. 1203 White cone ("Tab timp"), outlier of Navajo sandstone at head of Starlight Canyon. Wall of Paria Canyon (lower right). Kane County, Utah. 1944. #1:/Gregory H.E. Collection/ghe01204 ID. Gregory, H.E. 1204 Kane County, Utah. Vermilion Cliffs. Chinle Formation. Petrified Forest member (foreground and Basal Slopes) and upper Sandstone. 1944 #1:/Gregory H.E. Collection/ghe01205 ID. Gregory, H.E. 1205 Head of Sheep Wash. Same as 1204. Kane County, Utah. Vermilion Cliffs. Chinle Formation. Petrified Forest member (foreground and Basal Slopes) and upper Sandstone. 1944 #1:/Gregory H.E. Collection/ghe01206 ID. Gregory, H.E. 1206 West wall of Seaman Wash. Same as 1205. Kane County, Utah. Vermilion Cliffs. Chinle Formation. Petrified Forest member (foreground and Basal Slopes) and upper Sandstone. 1944 #1:/Gregory H.E. Collection/ghe01207 ID. Gregory, H.E. 1207 Kane County, Utah Vermilion Cliffs. Chinle Formation. Petrified Member eroded into badlands: upper Sandstone by outliers of Wingate, Lower Road Creek. 1944. #1:/Gregory H.E. Collection/ghe01208 ID. Gregory, H.E. 1208 Crescent Butte. Chinle Formation. Outlier of Vermillion Cliffs. near Johsons Creek. Kane County, Utah. 1944 #1:/Gregory H.E. Collection/ghe01209 ID. Gregory, H.E. 1209 Looking across house Rock Valley from W Clark Bench. West Dipping Navajo Sandstone trenched by Kaibab Creek (middle distance) is part of the east Kaibab Monocline: East Dipping Limestones (Sky Line) are the Gap rocks of the Kaibab Upwarp. Kane County, Utah. 1944. #1:/Gregory H.E. Collection/ghe01210 ID. Gregory, H.E. 1210 Looking south, up dip, across West Clark Bench. Upper Jurassic and Dakota (Butte). 1944. #1:/Gregory H.E. Collection/ghe01211 ID. Gregory, H.E. 1211 Kane County, Utah. Looking east across Paria River Canyon where it separates West and east Clark Benches. Upper Jurassic (foreground) and Navajo (Background) Dip Northeast Mtn and Kaibarowits Plateau are opposites of Glenn Canyon. 1944. #1:/Gregory H.E. Collection/ghe01212 ID. Gregory, H.E. 1212 Kane County, Utah. 1944. Looking south (Up Dip) down the Paria River, which has widened its floor and dissected its borders in upper Jurassic Rocks (foreground) and cut a deep narrow Canyon in the Navajo Sandstone. Site of the Abandoned Adairville. 1944. #1:/Gregory H.E. Collection/ghe01213 ID. Gregory, H.E. 1213 Flat Lying upper Jurassic (foreground) and Cretaceous Strata bend abruptly upward against the Navajo on the Plank of the East Kaibab Monocline (Left Sky Line) Table Cliffs (right) is about 50 Miles North Kane County, Utah. 1944. #1:/Gregory H.E. Collection/ghe01214 ID. Gregory, H.E. 1214 Erosed flak of the east Kaibab Monocline at the junction of Paria River & Cottonwood Creek, Kane County, Utah. 1944. #1:/Gregory H.E. Collection/ghe01215 ID. Gregory, H.E. 1215 Looking south along Paria River from the month of Shurtz Gorge. Navajo Sandstone in East Kaibab Monocline is overlaid with decreasing dips by upper Jurassic (banked against the Navajo) Dakota and Tropic (foreground and left Skyline) erosion surface (middle distance) bevels upturned Rocks. Kane County, Utah. 1944. #1:/Gregory H.E. Collection/ghe01216 ID. Gregory, H.E. 1216 Kane County, Utah. Plank of east Kaibab Monocline, bordering alluvial floor of Paria Valley. Navajo Sandstone (middle Sky Line), upper Jurassic Strata and Basal Cretaceous (Left) dips 40 degrees decrease to 30 Token 1,000 Feet. 1944. #1:/Gregory H.E. Collection/ghe01217 ID. Gregory, H.E. 1217 Kane Co., Utah. Pinnacles of Navajo Sandstones in House Rock Valley along the course of Kaibab Creek. Erosed part of east Kaibab Monocline. Kane County. Here it leaves its Structural Valley to cross east Kaibab Monocline northward through the Gap House Rock Valley and Kaibab Plateau are visible. 1944. #1:/Gregory H.E. Collection/ghe01218 ID. Gregory, H.E. 1218 Cap cut in Navajo Sandstone by Kaibab Creek where it leaves its structural valley to cross east Kaibab Monocline northward through the Gap House Rock Valley and Kaibab Plateau are visible. 1944. #1:/Gregory H.E. Collection/ghe01219 ID. Gregory, H.E. 1219 Kane County, Utah. Joints and small faults in Navajo Sandstone along the crest (Coxcomb) of east Kaibab Monocline. 1944. #1:/Gregory H.E. Collection/ghe01220 ID. Gregory, H.E. 1220 Kane County, Utah. Paria River below White Rock Spring. Wall of Navajo Sandstone Capped by Carmel Formation. 1944. #1:/Gregory H.E. Collection/ghe01221 ID. Gregory, H.E. 1221 Kane County Utah. Kaibab Limestone (lower wall, left) Breccia (marks unconformable contact) and Basal Moenkopi Limestones and shales. Mouth of Kaibab Gulch. 1944. #1:/Gregory H.E. Collection/ghe01222 ID. Gregory, H.E. 1222 Kane Co., Utah. Permian Limestones (Kaibab) overlain by the Triassic Moenkopi. Head of Kaibab Gulch, along Kanab-Paria Road. 1944. #1:/Gregory H.E. Collection/ghe01223 ID. Gregory, H.E. 1223 Coconino County., Arizona. Timpoweap Member of the Moenkopi Formation. Kaibab at Base. Upstream. East rim of the Kaibab Plateau near the Utah-Arizona Line. 1944. #1:/Gregory H.E. Collection/ghe01224 ID. Gregory, H.E. 1224 Kane Co., Utah. View Looking east from Kaibab Plateau across House Rock Valley (invisible) to the Coxcomb-Navajo Sandstone in the east Kaibab Monocline. Timpoweap member of the Moenkopi forms walls of local Gulch. 1944. #1:/Gregory H.E. Collection/ghe01225 ID. Gregory, H.E. 1225 Kane Co., Utah. 1944. Shinarump conglomerate at Pioneer Gap. 1944. #1:/Gregory H.E. Collection/ghe01226 ID. Gregory, H.E. 1226 Mesa capped by Dakota Sandstone eroded from upper Jurassic Winsor? formation. Head of Ash Creek. Kane Co., Utah. 1944. #1:/Gregory H.E. Collection/ghe01228 ID. Gregory, H.E. 1228 Kane County, Utah. Looking SE from Pioneer Gap across Kimball Valley (East Branch of Johnson Creek) to the Kaibab Plateau (Sky Line). Shinarump conglomerate (foreground) upper and middle Moenkopi largely concealed by alluvium, lower Moenkopi and Kaibab. 1944. #1:/Gregory H.E. Collection/ghe01229 ID. Gregory, H.E. 1229 Garfield Co., Utah. West Entrance. Fault crack in Navajo Sandstone on the West rim of Glen Canyon. A feature of the abandoned Escalante-Bluff Road. 1944. #1:/Gregory H.E. Collection/ghe01230 ID. Gregory, H.E. 1230 Garfield Co., Utah. The Navajo Sandstone (Foreground & Skyline) below it Kayenta and Wingate. 1944. #1:/Gregory H.E. Collection/ghe01231 ID. Gregory, H.E. 1231 Head of break neck trail down the south wall of Escalante Canyon (middle distance) Navajo Sandstone. Garfield County, Utah. 1944. #1:/Gregory H.E. Collection/ghe01232 ID. Gregory, H.E. 1232 Escalante Canyon two miles below Big Bend walls of Navajo Sandstone 800 feet high. 1944. #1:/Gregory H.E. Collection/ghe01233 ID. Gregory, H.E. 1233 Escalente Canyon down stream from Big Bend. Garfield County, Utah. 1944. #1:/Gregory H.E. Collection/ghe01234 ID. Gregory, H.E. 1234 Garfield Co., Utah. Escalante Canyon Cliff Cave three miles above Camp Gave. 1944. #1:/Gregory H.E. Collection/ghe01235 ID. Gregory, H.E. 1235 Garfield Co., Utah. Escalante Canyon. Pueblo Ruins in Cliff Cave. Navajo Sandstone. 1944. #1:/Gregory H.E. Collection/ghe01236 ID. Gregory, H.E. 1236 Garfield County. Utah Willow Creek Branch of Escalante Canyon. Entrance to "the Narrows"-- 400 feet long and 5-6 feet Feet Wide: Perched log marks high water stage. 1944. #1:/Gregory H.E. Collection/ghe01237 ID. Gregory, H.E. 1237 Garfield Co., Utah Willow Creek Branch of Escalante Canyon. In Sinking its Channel the Creek has been guided by Joints in Navajo Sandstone. 1944. #1:/Gregory H.E. Collection/ghe01238 ID. Gregory, H.E. 1238 Garfield Co., Utah Escalante Canyon. Sheer Wall of Navajo Sandstone 840 feet high. 1944. #1:/Gregory H.E. Collection/ghe01239 ID. Gregory, H.E. 1239 Garfield Co., Utah. Escalante Canyon. Walls of Navajo Sandstone at Big Bend Camp. Moonlight view. 1944. #1:/Gregory H.E. Collection/ghe01240 ID. Gregory, H.E. 1240 Escalante River at Big Bend, Flowing West after surrounding Tower of Navajo Sandstone (center) the river comes within 300 feet of its east flowing section at the base of Wall (upper left) See 1241. Garfield Co., Utah. 1944. #1:/Gregory H.E. Collection/ghe01241 ID. Gregory, H.E. 1241 Escalante River at Big Bend blowing east at times of high water. The stream blows across Kayenta Formation at the Meander Neck (lower right) See 1240. Garfield County, Utah. 1944. #1:/Gregory H.E. Collection/ghe01242 ID. Gregory, H.E. 1242 Garfield Co., Utah. Surface of Navajo Sandstone trenched by Escalante (right middle) Aquarius Plateau on Sky Line. 1944. #1:/Gregory H.E. Collection/ghe01243 ID. Gregory, H.E. 1243 Garfield Co., Utah. Surface of Navajo Sandstone between Escalante Canyon and Kaiparowits Plateau. Butte of Upper Jurassic Rocks. Near head of Davis Creek. 1944. #1:/Gregory H.E. Collection/ghe01244 ID. Gregory, H.E. 1244 Garfield Co., Utah. Gothic Arch. Width 174 feet estimated height 190 feet end of a buttress of Navajo Sandstone resting on Kayenta. Soda Creek Branch of Escalante River. 1944. #1:/Gregory H.E. Collection/ghe01245 ID. Gregory, H.E. 1245 Garfield Co., Utah. Natural Bridge of Navajo Sandstone. Span 85 feet, height to girder 76 feet. Willow Creek. 1944. #1:/Gregory H.E. Collection/ghe01246 ID. Gregory, H.E. 1246 Same as 1245. View from below. 1944. #1:/Gregory H.E. Collection/ghe01247 ID. Gregory, H.E. 1247 Garfield Co., Utah. Looking West across Panguitch. Sevier River Formation (foreground) Alluvium (middle distance) Basalt (left center) and Pyroclastic slopes leading to Little Creek Peak (Background) on the East Wall of Bear Valley. 1944. #1:/Gregory H.E. Collection/ghe01248 ID. Gregory, H.E. 1248 Garfield Co., Utah. Looking NW across Horse Lake Valley. Basalt (foreground) Pryoclastics (Background). 1944. #1:/Gregory H.E. Collection/ghe01249 ID. Gregory, H.E. 1249 Garfield County, Utah. Treeless slope developed on Pyroclastic and Igneous Rocks Typical of areas West of Panguitgh Creek. 1944. #1:/Gregory H.E. Collection/ghe01250 ID. Gregory, H.E. 1250 Garfield Co., Utah south fork of Sevier River below mouth of Asay Creek. 1944. #1:/Gregory H.E. Collection/ghe01251 ID. Gregory, H.E. 1251 Garfield Co., Utah. Lower Castle Creek Valley: Broad floor of low Brian Head Formation, 1944. #1:/Gregory H.E. Collection/ghe01252 ID. Gregory, H.E. 1252 Garfield Co., Utah. Blue Springs Meadow at Leigh Ranch. Stream from Big Springs (lower left). meanders through a water cap (Center distance). 1944. #1:/Gregory H.E. Collection/ghe01253 ID. Gregory, H.E. 1253 Garfield County, Utah Blue Springs Meadows. A former valley leading to Mammoth Creek blocked by Basalts from Miller Knoll (right Sky Line). Became a Lake that eventually cut an outlet northward through the Brian Head Formation (upper left) (see 1152). 1944. #1:/Gregory H.E. Collection/ghe01254 ID. Gregory, H.E. 1254 Garfield Co., Utah. Sheep Flat. Broad treeless highland crossed by shallow stream runways between coalpits wash and pinon ridge. A little modified part of the eastward dipping (right) surface of Markagrunt Plateau. 1944. #1:/Gregory H.E. Collection/ghe01255 ID. Gregory, H.E. 1255 Kane Co., Utah Wasatch Limestones, overlying Cretaceous: Southern limit of Pink Cliffs. Dairy Canyon. 1944. #1:/Gregory H.E. Collection/ghe01256 ID. Gregory, H.E. 1256 Kane Co., Utah. Brian Head Formation, consolidated (white wall) and disintegrated (upper slopes) and Pink Wasatch Limestones (lowest slopes), Seamans Canyon west of Gravel Pass. 1944. #1:/Gregory H.E. Collection/ghe01257 ID. Gregory, H.E. 1257 Near View of 1256. Kane Co., Utah. Brian Head Formation, consolidated (white wall) and disintegrated (upper slopes) and Pink Wasatch Limestones (lowest slopes), Seamans Canyon west of Gravel Pass. 1944. #1:/Gregory H.E. Collection/ghe01258 ID. Gregory, H.E. 1258 Garfield Co. Utah. Brian Head Formation underlain by Pink Wasatch Limestone on Highway 89 two miles north of Castle Creek. #1:/Gregory H.E. Collection/ghe01259 ID. Gregory, H.E. 1259 Garfield Co., Utah. Brian Head Formation. Branch of Asay Creek: Lies Beneath Basalt flows. 1944. #1:/Gregory H.E. Collection/ghe01260 ID. Gregory, H.E. 1260 Garfield Co., Utah. Typical output of Conglomerate near base of Brian Head Formation, Castle Creek. 1944. #1:/Gregory H.E. Collection/ghe01261 ID. Gregory, H.E. 1261 Garfield Co., Utah. Brian Head Formation at the "Castles" Castle Creek, 1944. #1:/Gregory H.E. Collection/ghe01262 ID. Gregory, H.E. 1262 Details of erosion - Same as 1261. Garfield Co., Utah. Brian Head Formation at the "Castles" Castle Creek, 1944. #1:/Gregory H.E. Collection/ghe01263 ID. Gregory, H.E. 1263 Garfield Co., Utah. Igneous Breccia in Brian Head Formation(?), Upper Panguitch Creek. 1944. #1:/Gregory H.E. Collection/ghe01264 ID. Gregory, H.E. 1264 Garfield Co., Utah Sevier River Formation overlaid by Basalt near mouth of Corral Creek on Highway 89. 1944. #1:/Gregory H.E. Collection/ghe01265 ID. Gregory, H.E. 1265 Igmepis Breccia on Brian Head Formation (?), upper Panguitch Creek. Garfield County, Utah. 1944. #1:/Gregory H.E. Collection/ghe01266 ID. Gregory, H.E. 1266 Garfield County, Utah Bowers Knoll: Volcano viewed from northeast. 1944. #1:/Gregory H.E. Collection/ghe01267 ID. Gregory, H.E. 1267 Garfield Co., Utah. Basalt, Head of Rock Creek. Old Lave (foreground) and end of newer flow (center). 1944. #1:/Gregory H.E. Collection/ghe01268 ID. Gregory, H.E. 1268 Near View of 1267. Garfield Co., Utah. Basalt, Head of Rock Creek. Old Lave (foreground) and end of newer flow (center). 1944. #1:/Gregory H.E. Collection/ghe01269 ID. Gregory, H.E. 1269 Garfield Co., Utah. End of Basalt flow in Black Rock Valley. White Rocks and lift Skyline (Haycock Mtn) of Brian Head Formation. 1944. #1:/Gregory H.E. Collection/ghe01270 ID. Gregory, H.E. 1270 Detailed view of 1269. Garfield Co., Utah. End of Basalt flow in Black Rock Valley. White Rocks and lift Skyline (Haycock Mtn) of Brian Head Formation. 1944. #1:/Gregory H.E. Collection/ghe01271 ID. Gregory, H.E. 1271 Garfield Co., Utah. Wagon Wheel Gap, Rock Creek. Canyon. Walls of Basalt, 120 feet high. 1944. #1:/Millers J.K. Collection/ghe01272 ID. Gregory, H.E. 1272 Johnson Valley, view northward to White Cliffs. Untrenched alluvial valley fill (30 to 80 feet deep) and bordering alluvial fans as they appeared in 1880. Zion National Park region, Utah and Arizona, n.d. (Photo by J.K. Hillers). Published as figure 112 in U.S. Geological Survey. Professional paper 220. 1950. #1:/Zion National Park/ghe01275 ID. Gregory, H.E. 1275 Zion National Park, Utah. Sketch of the restoration of a pueblo community house in Parunuweap Canyon, based on a study of ruins by B. Wetherill, U.S. National Park Service. Figure 19, U.S. Geological Survey Professional Paper 220. #1:/Gregory H.E. Collection/ghe01276 ID. Gregory, H.E. 1276 Tropic formation including coal beds, near highway bridge across Meadow Creek. Washington County, Utah.n.d. Published as figure 64 in U.S. Geological Survey. Professional paper 220. 1950. #1:/Stringham B. Collection/ghe01277 ID. Gregory, H.E. 1277 Lava in Gould Canyon. Porphyritic basalt; crystals in olivine (center and lower left) and augate (upper right) in a groundmass of augate prisms, labradorite laths, and magnetite grains; includes vesicles. X 60. Washington County, Utah. n.d. (Photo by B. Stringham) (Photomicrograph) Published as figure 72-A in U.S. Geological Survey. Professional paper 220. 1950. #1:/Stringham B. Collection/ghe01278 ID. Gregory, H.E. 1278 Lava in Sugar Loaf mesa. Basalt: lath-shaped twined crystals of labradorite olivine (lower center) and magnetite (dark areas) in groundmass of granular olivine and magnetite; augite absent. X 60. Washington County, Utah. n.d. (Photo by B. Stringham) (Photomicrograph) Published as figure ?2-B in U.S. Geological Survey. Professional paper 220. 1950, #1:/Zion National Park/ghe01279 ID. Gregory, H.E. 1279 Zion National Park, Utah. South entrance to The Narrows of the Virgin River. The stream flows between walls 1,500 to 1,700 feet high in a channel 20 to 50 feet wide. n.d. Figure 101, U.S. Geological Survey Professional Paper 220. #1:/Zion National Park/ghe01280 ID. Gregory, H.E. 1280 Zion National Park, Utah. Ephemeral stream, a tributary to Clear Creek, showing conditions favorable for making pot holes. n.d. Photo by U.S. National Park Service. Figure 126, U.S. Geological Survey Professional Paper 220. #1:/Zion National Park/ghe01281 ID. Gregory, H.E. 1281 Zion National Park, Utah. Hanging gardens, Narrows of the Virgin River. Dense masses of water-loving plants grow on travertine at seeps in the Navajo Sandstone. Photo by U.S. National Park Service. n.d Figure 18, U.S. Geological Survey Professional Paper 220. #1:/Gregory H.E. Collection/ghe01282 ID. Gregory, H.E. 1282 Faults in Entrada sandstone near Zion Park Junction. Length of exposure, over 12 feet. Washington County, Utah. n.d. Published as figure 57 in U.S. Geological Survey. Professional paper 220. 1950. #1:/National Park Service Collection/ghe01283 ID. Gregory, H.E. 1283 Black Ridge between North Creek and Dalton Wash, part of a larger flow from the northeast, overlies eroded Moenkopi strata. At top, basalt. Washington County, Utah.n.d. (Photo by National Park Service) Published as figure 75 in U.S. Geological Survey. Professional paper 220. 1950. #1:/National Park Service Collection/ghe01284 ID. Gregory, H.E. 1284 View northwest toward mouth of LaVerkin Canyon. Kaibab strata on steep back slope of Hurricane Cliffs (top center) become nearly horizontal and pass beneath the Moenkopi (right). Hurricane fault, here branched, passes the lava-capped Toquerville hill (left center) and extends northward between Hurricane Cliffs and Pine Valley Mountain (top left). Washington County, Utah.n.d. (Photo by National Park Service) Published as figure 80 in U.S. Geological Survey. Professional paper 220. 1950. #1:/Wegemann C.H. Collection/ghe01285 ID. Gregory, H.E. 1285 Fault in San Rafael group near Mount Carmel Junction. Entrada and Curtis Formations (left), Carmel formation (right), throw 120 feet. (Photo by C.H. Wegemann) Published as figure 88 in U.S. Geological Survey. Professional paper 220. 1950. #1:/Zion National Park/ghe01286 ID. Gregory, H.E. 1286 Zion National Park, Utah. Entrenched meanders of the Virgin River at the upper end of Zion Canyon. The walls of Navajo Sandstone rise 1,800 to 2,200 feet above the river. Photo by Army Air Corps. Figure 94, U.S. Geological Survey Professional Paper 220. #1:/National Park Service Collection/ghe01287 ID. Gregory, H.E. 1287 Erosion surface developed on Carmel formation. Flatlands (upper middle) are in process of dissection by Virgin River (bottom center) and its tributaries. The view includes 14 canyons, each as much as 800 feet deep. Washington County, Utah.n.d. (Photo by National Park Service) (Aerial photo) Published as figure 95 in U.S. Geological Survey. Professional paper 220. 1950. #1:/Scoyan E.Y. Collection/ghe01288 ID. Gregory, H.E. 1288 Rock buttress on Bridge Mountain overlooking Virgin Valley at Springdale. Length of curved Navajo sandstone, 156 feet long, width at base 6 feet, at top 4 feet. Washington County, Utah. n.d. (Photo by E.Y. Scoyan, National Park Service) Published as figure 123 in U.S. Geological Survey. Professional paper 220. 1950. #1:/Presnall C.C. Collection/ghe01289 ID. Gregory, H.E. 1289 Top of Paunsaugunt Plateau: forest of yellow pine, typical of flat areas at altitudes of about 8,000 feet. Kane and Garfield Counties, Utah. n.d. (Photo by C.C. Presnall) Published as figure 4 in U.S. Geological Survey. Professional paper 226. #1:/National Park Service Collection/ghe01290 ID. Gregory, H.E. 1290 Top of the Pausaugunt Plateau: forests of pine, spruce, and fir on rough lands at altitudes between 8,000 and 9,000 feet. Kane and Garfield Counties, Utah. n.d. (Photo by National Forest Service) Published as figure 5 in U.S. Geological Survey. Professional paper 226. 1951. #1:/Presnall C.C. Collection/ghe01291 ID. Gregory, H.E. 1291 Ripple marks and tadpole holes in limestone of Carmel formation, branch of Paria Valley. Garfield County, Utah. n.d. (Photo by C.C. Presnall) Published as figure 10 in U.S. Geological Survey. Professional paper 226. 1951. #1:/Gregory H.E. Collection/ghe01292 ID. Gregory, H.E. 1292 Thin bedded, friable Entrada sandstone (upper third of view) above calcareous shales of the Carmel formation, near the mouth of Everett Wash. Kane and Garfield Counties, Utah. n.d. Published as figure 11 in U.S. Geological Survey. Professional paper 226. 1951. #1:/Gregory H.E. Collection/ghe01293 ID. Gregory, H.E. 1293 Massive phase of Winsor formation in Paria Valley. Garfield County, Utah. n.d. Published as figure 15 in U.S. Geological Survey. Professional paper 226. 1951. #1:/Bryce Canyon National Park/ghe01294 ID. Gregory, H.E. 1294 Bryce Canyon National Park, Utah. Characteristic erosion features in the massive limestone of the Pink Cliffs along the Tropic Trail. n.d. Figure 21, U.S. Geological Survey Professional Paper 226. #1:/Button C.E. Collection/ghe01295 ID. Gregory, H.E. 1295 Wasatch formation (cliffs) unconformably overlying the Kaiparowits Formation (slope). First known view of the bordering wall of the Pausaugunt Plateau. Considered by C.E. Button as typical of the Eocene and Upper Cretaceous sediments. Kane and Garfield Counties, Utah. n.d. (Photo by C.E. Button) Published as figure 24 in U.S. Geological Survey. Professional paper 226. 1951; heliotype 7 in U.S. Geographical and Geological Survey of the Rocky Mountain Region. Report on the geology of the high plateaus of Utah. 1880. #1:/California National Guard Collection/ghe01296 ID. Gregory, H.E. 1296 The Pink Cliffs-walls developed in Wasatch formation. West edge of the Paunsaugunt Plateau, looking across the South Fork of Sevier River (foreground) and across alluvial fans toward Sunset Cliffs. Cretaceous and Tertiary strata (sky line), Hillsdale Gap and West Bluff upper left. Bryce Canyon National Park. Garfield County, Utah. n.d. (Photo by California National Guard, Fourteenth Division Aviation) Published as figure 43 in U.S. Geological Survey. Professional paper 226. 1951. #1:/Gregory H.E. Collection/ghe01297 ID. Gregory, H.E. 1297 View from Rainbow Point across foothills of Paunsaugunt Plateau showing roughly dissected highlands. Bryce Canyon National Park. Kane County, Utah. n.d. Published as figure 45 in U.S. Geological Survey. Professional paper 226. 1951. #1:/National Park Service Collection/ghe01298 ID. Gregory, H.E. 1298 View looking northeast from Inspiration Point on rim of Paunsaugunt Plateau across floor of Paria Amphitheater (eroded in Cretaceous shales) and bordering benches (cut in Cretaceous sandstones) to the rim-rock (Wasatch formation) exposed in Table Cliffs. The village of Tropic (right center) stands near the junction of Bryce Creek and Paria River. Bryce Canyon National Park. Garfield County, Utah. n.d. (Photo by National Park Service) Published as figure 50 in U.S. Geological Survey. Professional paper 226. 1951. #1:/National Park Service Collection/ghe01299 ID. Gregory, H.E. 1299 Paria Amphitheater, showing a flat part of the amphitheater used for farming. Garfield County, Utah. n.d. (Photo by National Park Service) Published as figure 51 in U.S. Geological Survey. Professional paper 226. 1951. #1:/U.S. Army Air Corp Collection/ghe01300 ID. Gregory, H.E. 1300 The rim of Paunsaugent Plateau at head of Bryce Canyon, showing narrow divide between streams (foreground) tributary to Paria and Colorado Rivers and streams that flow northward across Utah (background). Bryce Canyon National Park. Garfield County, Utah. n.d. (Photo by U.S. Army Air Corps) (Aerial view) Published as figure 56 in U.S. Geological Survey. Professional paper 226. 1951. #1:/National Park Service Collection/ghe01301 ID. Gregory, H.E. 1301 Carving of Wasatch formation in the Pink Cliffs. View looking across head of Campbell Canyon toward Boat Mesa (upper left). Bryce Canyon National Park. Garfield County, Utah, n.d. (Photo by National Park Service) Published as figure 60 in U.S. Geological Survey. Professional paper 226. 1951. #1:/Bryce Canyon National Park/ghe01302 ID. Gregory, H.E. 1302 Bryce Canyon National Park, Utah. Natural bridge developed in limestone of the Wasatch Formation at the head of Bridge Canyon. Photo by 0.C. Presnall. n.d Figure 61, U.S. Geological Survey Professional Paper 226. #1:/Gregory H.E. Collection/ghe01303 ID. Gregory, H.E. 1303 Remnant of Navajo sandstone cut from an ancient meander spur in Paria Canyon. Garfield County, Utah, n.d. Published as figure 63 in U.S. Geological Survey. Professional paper 226. 1951. #1:/Gregory H.E. Collection/ghe01304 ID. Gregory, H.E. 1304 The Three Patriarchs. Parts of the White Cliffs (Navajo sandstone) separated by tributaries to the Virgin River. Tops of monuments are at level of Kolob Terrace. Height above river in trench at their base is 2,200 feet. Zion National Park. Washington County, Utah. n.d. Published as figure 7 in U.S. Geological Survey. Professional paper 220. 1950. #1:/National Park Service Collection/ghe01305 ID. Gregory, H.E. 1305 East side of the valley of Virgin River near Springdale, displaying members of Chinle Formation (Triassic) and the Glen Canyon group (Jurassic?): Petrified Forest member; Springdale Sandstone member; upper sandstones; Wingate Sandstone and Kayenta formation covered by talus; Navajo Sandstone. Shinarump conglomerate beneath landslide (right center). Zion National Park. Washington County, Utah. n.d. (Photo by National Park Service) Published as figure 36 in U.S. Geological Survey. Professional paper 220. 1950 #1:/Gregory H.E. Collection/ghe01306 ID. Gregory, H.E. 1306 The White Throne, monolith of Navajo Sandstone; upper half, white. Height above Virgin River at base, 2,394 feet. Zion National Park. Washington County, Utah. n.d. Published as figure 46 in U.S. Geological Survey. Professional paper 220. 1950. #1:/Gregory H.E. Collection/ghe01307 ID. Gregory, H.E. 1307 Navajo Sandstone exposed along Zion-Mount Carmel highway, showing styles of bedding. Zion National Park. Washington County, Utah. n.d. Published as figure 48-A in U.S. Geological Survey. Professional paper 220. 1950. #1:/Gregory H.E. Collection/ghe01308 ID. Gregory, H.E. 1308 Navajo Sandstone exposed along Zion-Mount Carmel highway, showing styles of bedding. Zion National Park. Washington County, Utah, n.d. Published as figure 48-D in U.S. Geological Survey. Professional paper 220. 1950. #1:/Bryce Canyon National Park/ghe01309 ID. Gregory, H.E. 1309 Bryce Canyon National Park, Utah. Erosional forms of the Wasatch Formation, viewed northeast from lookout point at Bryce Canyon headquarters. n.d. #1:/Gregory H.E. Collection/ghe0284a ID. Gregory, H.E. 284a Water hole in Kaibab limestone, 3 + miles north of Limestone Tanks, Coconino County, Arizona. June 5, 1915. #1:/Thorpe M.R. Collection/ghe0603a ID. Gregory, H.E. 603a Shay Mountain, looking northwest across Indian Creek from the Abajo Mountains. San Juan County, Utah. 1915. (Panorama with photo nos. 603b-603c) (Photo by M.R. Thorpe) #1:/Thorpe M.R. Collection/ghe0603b ID. Gregory, H.E. 603b Shay Mountain, looking northwest across Indian Creek from the Abajo Mountains. San Juan County, Utah. 1915. (Panorama with photos no. 603a, 603c) (Photo by M.R. Thorpe) #1:/Thorpe M.R. Collection/ghe0603c ID. Gregory, H.E. 603c Shay Mountain, looking northwest across Indian Creek from the Abajo Mountains. San Juan County, Utah. 1915. (Panorama with photos no. 603a-603b) (Photo by M.R. Thorpe) #1:/Thorpe M.R. Collection/ghe0638a ID. Gregory, H.E. 638a Panorama of head of Johnson Creek, from West Mountain. Abajo Mountains. San Juan County, Utah. 1915. (Photo by K.R. Thorpe). (Panorama with photo nos. 638b, 638c). #1:/Thorpe M.R. Collection/ghe0638b ID. Gregory, H.E. 638b Panorama of head of Johnson Creek, from West Mountain. Abajo Mountains. San Juan County, Utah. 1915. (Photo by K.R. Thorpe). (Panorama with photo nos. 638a, 638c.) #1:/Thorpe M.R. Collection/ghe0638c ID. Gregory, H.E. 638c Panorama of head of Johnson Creek, from West Mountain. Abajo Mountains. San Juan County, Utah. 1915. (Photo by K.R. Thorpe). (Panorama with photo nos. 638a, 638b.) #1:/Thorpe M.R. Collection/ghe0639a ID. Gregory, H.E. 639a Panorama, looking west from Camp Jackson. West Peak in left center. Abajo Mountains. San Juan County, Utah. 1915. (Photo by M.R. Thorpe). (Panorama with photo nos. 639b, 639c). #1:/Thorpe M.R. Collection/ghe0639b ID. Gregory, H.E. 639b Panorama, looking west from Camp Jackson. West Peak in left center. Abajo Mountains. San Juan County, Utah. 1915. (Photo by M.R. Thorpe). (Panorama with photo nos. 639a, 639c.) #1:/Thorpe M.R. Collection/ghe0639c ID. Gregory, H.E. 639c Panorama, looking west from Camp Jackson. West Peak in left center. Abajo Mountains. San Juan County, Utah. 1915. (Photo by M.R. Thorpe). (Panorama with photo nos. 639a, 639b.) #1:/Gregory H.E. Collection/ghe0643a ID. Gregory, H.E. 643a Face of cliffs about 3 miles north of Clay Hills Crossing (San Juan River). Middle and upper "Moenkopi". Chinle and Wingate in background. Chinle material forms slide. San Juan County, Utah. 1930 #1:/Gregory H.E. Collection/ghe0643b ID. Gregory, H.E. 643b Face of cliffs about 3 miles north of Clay Hills Crossing (San Juan River). Middle and upper "Moenkopi". Chinle and Wingate in background. Chinle material forms slide. San Juar County, Utah. 1930. #1:/Gregory H.E. Collection/ghe0735a ID. Gregory, H.E. 735a Topmost Jurassic with thin cap of Dakota 3 miles northwest of Findley Ranch. Kane County, Utah. 1934 #1:/Gregory H.E. Collection/ghe0735b ID. Gregory, H.E. 735b Head of Kitchen Canyon. Right, looking east along fault. Navajo sandstone of White Cliffs; left, Carmel formation. Kane County, Utah. 1934. #1:/Gregory H.E. Collection/ghe0748a ID. Gregory, H.E. 748a View looking north across Virgin River at Rockville. Foreground, Moenkopi capped by "Shinarump; middle distance, Chinle; distance, Navajo forming Mount Kinesava. Washington County, Utah. 1936. #1:/Gregory H.E. Collection/ghe0765a ID. Gregory, H.E. 765a Panorama, Harris Mountain from south. All Navajo except for Carmel limestone on top highest mesas. Kane County, Utah, 1936. (Panorama with photo no. 765b) #1:/Gregory H.E. Collection/ghe0765b ID. Gregory, H.E. 765b Panorama, Harris Mountain from south. All Navajo except for Carmel limestone on top highest mesas. Kane County, Utah, 1936. Panorama with photo no. 765a. #1:/Gregory H.E. Collection/ghe0793a ID. Gregory, H.E. 793a Washington County, Utah. Same as No. 793. Timpoweap Canyon virgin River, bedded Conglomerate between beds of Kaibab Limestone. 1937. #1:/Gregory H.E. Collection/ghe1062a ID. Gregory, H.E. 1062a Iron County, Utah. (Panaroma) Ashdowm Canyon, 600-1800 feet deep, 20-150 feet wide cut in Straight Cliffs sandstone. 1941. #1:/Gregory H.E. Collection/ghe1062b ID. Gregory, H.E. 1062b Iron County, Utah. (Panaroma) Ashdown Canyon, 600-1800 feet deep, 20-150 feet wide cut in Straight Cliffs sandstone. 1941. #1:/Gregory H.E. Collection/ghe1068a ID. Gregory, H.E. 1068a Iron County, Utah. Kaiparowits formation head of Deep. 1941. #1:/Gregory H.E. Collection/ghe1102a ID. Gregory, H.E. 1102a Iron County, Utah. Panorama. Surface of Kolob Terrace near the head of Kolob. n.d. #1:/Gregory H.E. Collection/ghe1102b ID. Gregory, H.E. 1102b Iron County Utah. Panorama. Surface of Kolob Terrace near the head of Kolob Creek. n.d. #1:/Gregory H.E. Collection/ghe1121a ID. Gregory, H.E. 1121a Iron County, Utah. 1942. #1:/Gregory H.E. Collection/ghe1133a ID. Gregory, H.E. 1133a no caption. Iron County, Utah. 1942. no caption. n.d. #1:/Gregory H.E. Collection/ghe1133c ID. Gregory, H.E. 1133c Gregory, #1133a. 1133b, 1133c, 1133d. n.d. #1:/Gregory H.E. Collection/ghe1133d ID. Gregory, H.E. 1133d Panorama. n.d. #1:/Gregory H.E. Collection/ghe1165a ID. Gregory, H.E. 1165a Washington County, Utah. (Panorama). Western edge of Zion National Monument looking east across the Hurricane Cliffs, from a point on the New Harmony road, showing Permian (Kaibab), Triassic (Moenkopi Shinarump, Chinle), and Jurassic (Navajo, Carmel, Entrada) strata. Lava capped Horseranch Mountain (upper left) buttresses at head of Taylor Creek, (upper center), Timbertop Mesa, (upper right), 1943. #1:/Gregory H.E. Collection/ghe1175a ID. Gregory, H.E. 1175a Burro on East Fork of Sevier River above mouth of Deer Creek. Locus of Paunsaugunt fault; upthrow on east (right). Garfield County, Utah. 1943. #1:/Gregory H.E. Collection/ghe1216a ID. Gregory, H.E. 1216a Panorama with 1216 & 1216b. Kane County, Utah. 1944. #1:/Gregory H.E. Collection/ghe1220a ID. Gregory, H.E. 1220a Kane County Utah Same as 1220. Upper Jurassic Rocks on right Sky Line. 1944. #1:/Alaska Glaciers/ghr00175 ID. Gault, H.R. 175 Alaska Glaciers. Nelson Glacier and Mt. Waters from ridge above Glacier Basin. Wrangell District. cc 1942. #1:/Gault Collection/ghr00189 ID. Gault, H.R. 189 Photo of H.R. Gault taken in Myers Chuck. Wrangell District. October 2, 1942. #1:/Gault Collection/ghr00320 ID. Gault, H.R. 320 Photo of Clyde Wahrhaftig. Wrangell District. March 28, 1943. #1:/Alaska Glaciers/ghr00366 ID. Gault, H.R. 366 Alaska Glaciers. Looking up Nelson Glacier. Wrangell District. September 1943. #1:/Alaska Glaciers/ghr00367 ID. Gault, H.R. 367 Alaska Glaciers. Lower end of Nelson Glacier. Wrangell District. September 1943. #1:/Gault Collection/ghr00387 ID. Gault, H.R. 387 George Flint in Camp. Wrangell District. August 1943. #1:/Gault Collection/ghr00388 ID. Gault, H.R. 388 R.T. Lachenbruch in Camp. Wrangell District. August 1943. #1:/Alaska Glaciers/ghr00411 ID. Gault, H.R. 411 Alaska Glaciers. Lake Virginia and Wrangell Island from top of south slop of Glacier Basin. Wrangell District. August 1943. #1:/Alaska Glaciers/ghr00412 ID. Gault, H.R. 412 Alaska Glaciers. Nelson Glacier and east end of Glacier Basin. Wrangell District. August 1943. #1:/Alaska Glaciers/ghr00419 ID. Gault, H.R. 419 Alaska Glaciers. Panorama to west, north and east from north side of peak 4820; Mt Waters and Nelson Glacier and Rossman. Wrangell District. August 1943. #1:/Alaska Glaciers/ghr00420 ID. Gault, H.R. 420 Alaska Glaciers. Panorama to west, north and east from north side of peak 4820; Mt Waters and Nelson Glacier and Rossman. Wrangell District. August 1943. #1:/Alaska Glaciers/ghr00421 ID. Gault, H.R. 421 Alaska Glaciers. Panorama to west, north and east from north side of peak 4820; Mt Waters and Nelson Glacier and Rossman. Wrangell District. August 1943. #1:/Alaska Glaciers/ghr00422 ID. Gault, H.R. 422 Alaska Glaciers. Panorama to west, north and east from north side of peak 4820; Mt Waters and Nelson Glacier and Rossman. Wrangell District. August 1943. #1:/Alaska Glaciers/ghr00423 ID. Gault, H.R. 423 Alaska Glaciers. Panorama to west, north and east from north side of peak 4820; Mt Waters and Nelson Glacier and Rossman. Wrangell District. August 1943. #1:/Alaska Glaciers/ghr00424 ID. Gault, H.R. 424 Alaska Glaciers. Panorama to west, north and east from north side of peak 4820; Mt Waters and Nelson Glacier and Rossman. Wrangell District. August 1943. #1:/Alaska Glaciers/ghr00425 ID. Gault, H.R. 425 Alaska Glaciers. Panorama to west, north and east from north side of peak 4820; Mt Waters and Nelson Glacier and Rossman. Wrangell District. August 1943. #1:/Alaska Glaciers/ghr00426 ID. Gault, H.R. 426 Alaska Glaciers. Panorama to west, north and east from north side of peak 4820; Mt Waters and Nelson Glacier and Rossman. Wrangell District. August 1943. #1:/Alaska Glaciers/ghr00427 ID. Gault, H.R. 427 Alaska Glaciers. Front of Nelson Glacier. Lachenbruch on left edge of Glacier. [almost visable]. Wrangell District. September 1943. #1:/Alaska Glaciers/ghr00428 ID. Gault, H.R. 428 Alaska Glaciers. Nelson Glacier, upstream. Wrangell District. September 1943. #1:/Alaska Glaciers/ghr00429 ID. Gault, H.R. 429 Alaska Glaciers. Nelson Glacier, upstream. Wrangell District. September 1943. #1:/Alaska Glaciers/ghr00430 ID. Gault, H.R. 430 Alaska Glaciers. Nelson Glacier, downstream. Wrangell District. September 1943. #1:/Alaska Glaciers/ghr00435 ID. Gault, H.R. 435 Alaska Glaciers. Panorama of Mt. Waters, Nelson Glacier and country east of Aaron Creek and south slope of Glacier Basin from south slop. Panorama with Photo Nos. ghr00436 and ghr00437. Wrangell District. September 1943. #1:/Alaska Glaciers/ghr00436 ID. Gault, H.R. 436 Alaska Glaciers. Panorama of Mt. Waters, Nelson Glacier and country east of Aaron Creek and south slope of Glacier Basin from south slop. Panorama with Photo Nos. ghr00435 and ghr00437. Wrangell District. September 1943. #1:/Alaska Glaciers/ghr00437 ID. Gault, H.R. 437 Alaska Glaciers. Panorama of Mt. Waters, Nelson Glacier and country east of Aaron Creek and south slope of Glacier Basin from south slop. Panorama with Photo Nos. ghr00435 and ghr00436. Wrangell District. September 1943. #1:/Alaska Glaciers/ghr00438 ID. Gault, H.R. 438 Alaska Glaciers. Panorama south from South ridge above Glacier Basin looking into Bergs Basin to the west, a small cirque to the east and Aaron Creek and eastern passage in background. Wrangell District. September 1943. #1:/Alaska Glaciers/ghr00489 ID. Gault, H.R. 489 Alaska Glaciers. View up Side Valley to Chris Creek Ca. Two miles up from flat on Endicott Arm. Peak at head is 5400 Peak on south side of Sumdum Glacier. Petersburg district, SE Alaska region. September 1944. #1:/Alaska Glaciers/ghr00490 ID. Gault, H.R. 490 Alaska Glaciers. Sawyer Glacier, which is southeast of Juneau in the Coast Mountains, viewed from a small island at the head of Tracy Arm. July 1944. #1:/Alaska Glaciers/ghr00491 ID. Gault, H.R. 491 Alaska Glaciers. Sawyer Glacier, which is southeast of Juneau in the Coast Mountains, viewed from a small island at the head of Tracy Arm. July 1944. #1:/Alaska Glaciers/ghr00505 ID. Gault, H.R. 505 Alaska Glaciers. View to northeast from ridge on north side Powers Creek about two miles from tidewater looking toward Mt. Sumdum (not in picture). Petersburg district, SE Alaska region. September 1944. #1:/Alaska Glaciers/ghr00506 ID. Gault, H.R. 506 Alaska Glaciers. The so-called "Hidden Basin" is first basin north of Sumdum Glacier. Taken frm near same point as Photo No. ghr00505. Petersburg district, SE Alaska region. September 1944. #1:/Alaska Glaciers/ghr00509 ID. Gault, H.R. 509 Alaska Glaciers. Northeast end of "Hidden Basin" and Contact Coast range batholith and Wrangell-Revilla Meta Belt. Petersburg district, SE Alaska region. September 1944. #1:/Alaska Glaciers/ghr00510 ID. Gault, H.R. 510 Alaska Glaciers. Mt. Skumdum and Tom Steward from upper end of "Hidden Basin". Wrangell-Revilla Meta Belt. Petersburg district, SE Alaska region. September 1944. #1:/Alaska Glaciers/ghr00511 ID. Gault, H.R. 511 Alaska Glaciers. Sumdum Glacier and east side of Holkham Bay from point east of Harbor Island. Petersburg district, SE Alaska region. September 1944. #1:/Alaska Glaciers/ghr00512 ID. Gault, H.R. 512 Alaska Glaciers. Sumdum Glacier from Holkham Bay. Petersburg district, SE Alaska region. September 1944. #1:/Alaska Glaciers/ghr00513 ID. Gault, H.R. 513 Alaska Glaciers. Sumdum Glacier, Harbor Island and Endicott Arm from Stephens Passage north of Point Coke. Petersburg district, SE Alaska region. September 1944. #1:/Alaska Glaciers/ghr00514 ID. Gault, H.R. 514 Alaska Glaciers. Sumdum Glacier, Harbor Island and Holkham Bay from point in Stephens Passage opposite Holkham Bay. Petersburg district, SE Alaska region. September 1944. #1:/Alaska Glaciers/ghr00515 ID. Gault, H.R. 515 Alaska Glaciers. Sumdum Glacier, Mt. Sumdum. Point Astley and Point Coke from Stephens Passage south of Point Astley. Petersburg district, SE Alaska region. September 1944. #1:/Alaska Glaciers/ghr00516 ID. Gault, H.R. 516 Alaska Glaciers. Sumdum Glacier and Holkham Bay from beach near mouth of Powers Creek. Petersburg district, SE Alaska region. September 1944. #1:/Alaska Glaciers/ghr00525 ID. Gault, H.R. 525 Alaska Glaciers. View down Dumdum Glacier and Holkham bay from altitude 4800 feet. Petersburg district, SE Alaska region. September 1944. #1:/Alaska Glaciers/ghr00526 ID. Gault, H.R. 526 Alaska Glaciers. View over Holkham Bay. H.R. Gault on Rock on lower left side of photo. Petersburg district, SE Alaska region. September 1944. #1:/Alaska Glaciers/ghr00544 ID. Gault, H.R. 544 Alaska Glaciers. Oblique aerial view(?) north from the top of the south slope of Glacier Basin. Identification on photo includes Mount Waters and Nelson Glacier at right, and Marsha Peak at left center. Wrangell district, Southeastern Alaska region, Alaska. n.d. Published as plate 6 in U. S. Geological Survey Bulletin 998-B. 1953. #1:/Gale H.S. Collection-McCrosky Coal Mine/ghs00032 ID. Gale, H.S. 32 The McCrosky Coal Mine, Pool, looking northeast. Routt County, Colorado. 1905. #1:/Gale H.S. Collection-Coryell Coal Mine/ghs00267 ID. Gale, H.S. 267 Mine buildings at the Coryell Coal Mine, Newcastle. Garfield County, Colorado. 1905. #1:/Gale H.S. Collection/ghs00303 ID. Gale, H.S. 303 Blevin's Placer Dredge on Lay Creek about 8 miles north of Lay post office. Moffat County, Colorado. 1906. #1:/Gale H.S. Collection/ghs00305 ID. Gale, H.S. 305 Blevin's dredge and placer ground, looking north to east. Sec. 22, T. 8 N., R. 93W. Showing the character of the placer ground, Lay Creek, about 8 miles north of Lay post office. Moffat County, Colorado. 1906. #1:/Gale H.S. Collection-J.W.Rectore Coal Mine/ghs00348 ID. Gale, H.S. 348 Entrance to J.W. Rector coal mine. Rio Blanco County, Colorado. 1906. #1:/Gale H.S. Collection/ghs00353 ID. Gale, H.S. 353 Black Dragon Gilsonite vein from the south side of canyon. Looking toward the northeast. Shows mine workings and tipple. Dragon, Uintah County, Utah.n.d. #1:/Gale H.S. Collection/ghs00359 ID. Gale, H.S. 359 Black Dragon Gilsonite vein, Taken at the entrance to the main workings. Dragon. Uintah County, Utah.n.d. #1:/Gill J.R. Collection/gjr00018 ID. Gill, J.R. 18ct Jarosite concretions in Ludlow Formation, ranger station area, Slim Buttes. Harding County, South Dakota. 1953. #1:/Gill J.R. Collection/gjr00139 ID. Gill, J.R. 139ct Arikaree Formation slump on White River Group, including Brule Formation. Mendenhall area, Slim Buttes. Harding County, South Dakota. August 1953. #1:/Black Canyon Of The Gunnison National Park/gjr00395 ID. Gill, J.R. 395 Black Canyon Of The Gunnison National Park, Colorado. The cliff of the Painted Wall is carved from gneiss interlaced with pegmatite dikes. #1:/Black Canyon Of The Gunnison National Park/gjr00399 ID. Gill, J.R. 399 Black Canyon Of The Gunnison National Park, Colorado. Painted Wall is about 2,250 feet from rim to river. The cliff is carved from gneiss interlaced with pegmatite dikes. #1:/Arches National Park/gjr00423 ID. Gill, J.R. 423ct Arches National Park, Utah. Park Avenue, viewed to the north along the trail. #1:/Zion National Park/gjr00429 ID. Gill, J.R. 429ct Zion National Park, Utah. Checkerboard Mesa. #1:/Canyon de Chelly National Monument/gjr00439 ID. Gill, J.R. 439ct Canyon de Chelly National Monument, Arizona. White House ruins. #1:/Arches National Park/gjr00445 ID. Gill, J.R. 445ct Arches National Park, Utah. Double Arch in the Windows section. #1:/Zion National Park/gjr00939 ID. Gill, J.R. 939ct Zion National Park, Utah. Checkerboard Mesa. #1:/Bryce Canyon National Park/gjr00953 ID. Gill, J.R. 953ct Bryce Canyon National Park, Utah. Different views of erosional forms. #1:/Bryce Canyon National Park/gjr00956 ID. Gill, J.R. 956ct Bryce Canyon National Park, Utah. Natural bridge in the Wasatch Formation at the south end of the park. #1:/Bryce Canyon National Park/gjr00957 ID. Gill, J.R. 957ct Bryce Canyon National Park, Utah. Different views of erosional forms. #1:/Bryce Canyon National Park/gjr00958 ID. Gill, J.R. 958ct Bryce Canyon National Park, Utah. Different views of erosional forms. #1:/Bryce Canyon National Park/gjr00960 ID. Gill, J.R. 960ct Bryce Canyon National Park, Utah. Different views of erosional forms. #1:/Grand Canyon National Park/glc00295 ID. Graton, L.C. 295 Grand Canyon National Park, Arizona. Downstream from the El Tovar Hotel. Pre-1909. #1:/Grand Canyon National Park/glc00296 ID. Graton, L.C. 296 Grand Canyon National Park, Arizona. Downstream from the El Tovar Hotel. Pre-1909. #1:/Grand Canyon National Park/glc00297 ID. Graton, L.C. 297 Grand Canyon National Park, Arizona. Toward Bright Angel Trail from the El Tovar Hotel. Pre-1909. #1:/Grand Canyon National Park/glc00299 ID. Graton, L.C. 299 Grand Canyon National Park, Arizona. Canyon, viewed from a point east of the El Tovar Hotel. Pre-1909. Possible panorama with photo glc00300. #1:/Grand Canyon National Park/glc00301 ID. Graton, L.C. 301 Grand Canyon National Park, Arizona. Toward the El Tovar Hotel and the south canyon wall, viewed from the rim. Pre-1909. #1:/Grand Canyon National Park/glc00302 ID. Graton, L.C. 302 Grand Canyon National Park, Arizona. Upstream, viewed from the first point west of the El Tovar Hotel. Pre-1909. Possible panorama with photo glc00303. #1:/Grand Canyon National Park/glc00303 ID. Graton, L.C. 303 Grand Canyon National Park, Arizona. Upstream, viewed from the first point west of the El Tovar Hotel. Pre-1909. Possible panorama with photo glc00303. #1:/Grand Canyon National Park/glc00304 ID. Graton, L.C. 304 Grand Canyon National Park, Arizona. Downstream, viewed from a point west of the El Tovar Hotel. Pre-1909. #1:/Grand Canyon National Park/glc00305 ID. Graton, L.C. 305 Grand Canyon National Park, Arizona. North Rim, viewed from a point west of the El Tovar Hotel. Pre-1909. Photos glc00305 and glc00306 form a panorama. #1:/Grand Canyon National Park/glc00306 ID. Graton, L.C. 306 Grand Canyon National Park, Arizona. North Rim, viewed from a point west of the El Tovar Hotel. Pre-1909. Photos glc00305 and glc00306 form a panorama. #1:/Goldman M.I. Collection-Danville Mine/gmi00013 ID. Goldman, M.I. 13 Danville mine. Colorado Springs, El Paso County, Colorado. 1908. #1:/Goldman M.I. Collection-Carlton Mine-Pikeview Mine/gmi00015 ID. Goldman, M.I. 15 Carlton or Pikeview Mine north of Colorado Springs. El Paso County, Colorado. 1908. #1:/Algae in Phytoplankton/gpe00029 ID. Greeson, P.E. 29 Algae in Phytoplankton. Scanning electronmicrograph (SEM) of cocconeis. Circa 1975. Figure 26, U.S. Geological Survey Water-Supply Paper 2079. #1:/Algae in Phytoplankton/gpe00030 ID. Greeson, P.E. 30 Algae in Phytoplankton. Scanning electronmicrograph (SEM) of cyclotella. Circa 1975. Figure 27, U.S. Geological Survey Water-Supply Paper 2079. #1:/Algae in Phytoplankton/gpe00032 ID. Greeson, P.E. 32 Algae in Phytoplankton. Scanning electronmicrograph (SEM) of epithemia. Circa 1975. Figure 31, U.S. Geological Survey Water-Supply Paper 2079. #1:/Algae in Phytoplankton/gpe00035 ID. Greeson, P.E. 35 Algae in Phytoplankton. Scanning electronmicrograph (SEM) of melosira. Circa 1975. Figure 36, U.S. Geological Survey Water-Supply Paper 2079. #1:/Algae in Phytoplankton/gpe00037 ID. Greeson, P.E. 37 Algae in Phytoplankton. Scanning electronmicrograph (SEM) of stephanodiscus. Circa 1975. Figure 41, U.S. Geological Survey Water-Supply Paper 2079. #1:/Grand Canyon National Park/gra00318 ID. Grand Canyon, 318 Grand Canyon National Park, Arizona.R.W. Burchard and C.H. Birdseye in upper Granite Gorge. Photo by L.R. Freeman. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/grand004 ID. Grand Canyon, 4 Grand Canyon National Park, Arizona. The boat "Grand" in rapids 11 miles above Vasey's Paradise. Such a vast amount of sediment is carried down by the swift current of the Colorado that the rapids never froth white, but present up- tossed ruffles of gray foam which, when photographed, resemble churned lava. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/grand017 ID. Grand Canyon, 17 Grand Canyon National Park, Arizona. The boat "Boulder" running the lower part of Soap Creek Rapid. One man of the Stanton surveying party of 1889 lost his life in this turbulent stretch of water. Colorado River Survey of 1923 (Birdseye). #1:/Gand Canyon National Park/grand035 ID. Grand Canyon, 35 Grand Canyon National Park, Arizona. Members of the Grand Canyon survey party on a boulder island at Vasey's Paradise. Delicately rather than brilliantly colored, the subdued pinks and yellows and browns make the cliffs below Vasey's Paradise unrivaled in the whole Grand Canyon, save possibly by those in the vicinity of the mouth of Havasu Creek. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/grand038 ID. Grand Canyon, 38 Grand Canyon National Park, Arizona. Sheer walls in Marble Canyon. The rate at which this canyon burrows its way into the earth never fails to astonish the traveler entering it for the first time. Twenty miles below its head, the walls are 2,000 feet above the river, nine-tenths being due to the rise of the plateau and one-tenth to the descent of the stream. Colorado River Survey of 1923 (Birdseye). #1:/Grand Collection-Grand Canyon National Park/grand045 ID. Grand Canyon, 45 Ancient Indian structures, which were possibly used to store grain, can be seen in a cave within the Mississippian Redwall Limestone in this downstream view near the mouth of Nankoweap Canyon. The photographic station is roughly 259 meters above the Colorado and 84.6 kilometers below Lees Ferry. A dense stand of catclaw, western honey mesquite, and netleaf hackberry occurs above the level attained by the river during flood stage. (Altitude 847 meters). Man by ruins for scale. Grand Canyon National Park. Coconino County, Arizona. 1923. (Photo same as Turner, R.M.36). Published as figure 44A in U.S. Geological Survey. Professional paper 1132. 1980. #1:/Kolb E.C. Collection-Grand Canyon National Park/grand050 ID. Grand Canyon, 50 Repairing the "Boulder" at Hance Rapids. Photo by E.C. Kolb. Grand Canyon National Park, Coconino County, Arizona. 1923. #1:/Kolb E.C. Collection-Grand Canyon National Park/grand051 ID. Grand Canyon, 51 Repairing the "Boulder" at Hance Rapids. Photo by E.C. Kolb. Grand Canyon National Park, Coconino County, Arizona. 1923. #1:/Grand Canyon National Park/grand060 ID. Grand Canyon, 60 Grand Canyon National Park, Arizona. Dr. Moore, during a noonday halt, measures the arms of Leigh Lint, browned by exposure, and H. Stabler, who had just joined the expedition. Colorado River Survey of 1923 (Birdseye). #1:/Kolb E.C. Collection-Grand Canyon National Park/grand065 ID. Grand Canyon, 65 Topographers at work below Walthenberg Canyon Rapids. Left to right: Stabler, Birdseye, Burchard. Photo by E. C, Kolb. Grand Canyon National Park, Coconino County, Arizona. 1923. #1:/Grand Canyon National Park/grand084 ID. Grand Canyon, 84 Grand Canyon National Park, Arizona. Lava Rock Island, above Lava Falls. Lava Falls is three and a half days journey below Havasu Creek. Colorado River Survey of 1923 (Birdseye). #1:/Grand Collection-Grand Canyon National Park/grand173 ID. Grand Canyon, 173 This photograph provides a downstream view of the Grand Canyon from within Redwall Cavern, 53.3 kilometers below Lees Ferry. The cavern, formed by solution of the Mississippian Redwall Limestone is one of the major attractions of the Grand Canyon. Prior to the construction of Glen Canyon Dam, the river entered the cavern during high flows producing conditions too unstable for plant establishment. Powell camped here during a rainstorm and noted that the floor would be inundated during periods of peak flow by a "raging flood." Waves during an earlier period of high water have produced marks in the sand that are high above the river level in this view. Erosion of the alluvium is apparent from the vertical bank near the edge of the water. The large blocks on the far side of the cavern and in the foreground have fallen from the roof. The plant in the foreground is dogbane. (Altitude 873 meters). Men and boats for scale. Grand Canyon National Park. Coconino County, Arizona. 1923. (Photo same as Turner, R.M. 32). Appears as figure 42B (photos transposed in publication) in U.S. Geological Survey. Professional paper 1132. 1980. #1:/Grand Canyon National Park/grand308 ID. Grand Canyon, 308 Grand Canyon National Park, Arizona. Boathouse at Lees Ferry, with Vermillion Cliffs in the distance. Three of the boats to be used by the expedition were here when the party arrived. Colorado River Survey of 1923 (Birdseye). #1:/Freeman L.R. Collection-Grand Canyon National Park/grand313 ID. Grand Canyon, 313 Kolb in "Marble" below Hermit Creek. Photo by L.R. Freeman. Grand Canyon National Park, Coconino County, Arizona. 1923. #1:/Freeman L.R. Collection-Grand Canyon National Park/grand330 ID. Grand Canyon, 330 Launching boats at the last camp, above Hance Trail, Colorado River, during the Birdseye Expedition. Photo by L.R. Freeman. Grand Canyon National Park. Coconino County, Arizona. 1923. Published on p. 29, lower right, in U.S. Geological Survey. Images of the U.S. Geological Survey, 1879-1979. 1979. #1:/Grand Collection-Grand Canyon National Park/grand332 ID. Grand Canyon, 332 The U.S. Geological Survey team is shown packing up for portage at the head of Hance Rapids, 123.1 kilometers below Lees Ferry. The pack animals were able to reach the river from the South Rim by descending the Hance Trail. The base of the vertical exposure of Precambrian Shinumo Quartzite (upper left) is well defined by differential weathering of the underlying Hakatai Shale. A thicket of desert shrubs can be seen on the left above the zone scoured by floods. (Altitude 780 meters). Grand Canyon National Park. Coconino County, Arizona. 1923. (Photo same as Turner, R.M.44). Published as figure 48A in U.S. Geological Survey. Professional paper 1132. 1980. #1:/Freeman L.R. Collection-Grand Canyon National Park/grand354 ID. Grand Canyon, 354 Camp at Shinumo Creek. Photo by L.R. Freeman Grand Canyon National Park, Coconino County, Arizona. 1923. #1:/Australia/gri00053 ID. Grauch, R.I. 53ct Australia. Core sample showing marble. Jabiluka-type gold deposits found in the Northern Territory. Circa 1985. Slide 2-16, U.S. Geological Survey Open File Report 87-142. #1:/Guatemala Earthquake 1976/gueq0002 ID. GUATEMALA EARTHQUAKE 2 Guatemala Earthquake 1976. Seismoscope plate of main event located on a rooftop instrument at the administration building of the Universidad de San Carlos, Guatemala City. Instrument was about 30 kilometers south of the Motagua fault surface breakage. Arrow (about left center) indicates north. The plate was scratched all over. Recording of main event is shown in the middle part of the plate and to the sides before dislodging. 1976. Figure 16, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0003 ID. GUATEMALA EARTHQUAKE 3 Guatemala Earthquake 1976. Seismoscope plate of main event located on a ground floor instrument at the administration building of the Universidad de San Carlos, Guatemala City. Instrument was about 30 kilometers south of the Motagua fault surface breakage. Arrow (upper left) indicates north. The plate was scratched all over. Recording of main event is shown in the middle part of the plate. 1976. Figure 17, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0004 ID. GUATEMALA EARTHQUAKE 4 Guatemala Earthquake 1976. Seismogram showing contrast of activity in the aftershock zone. Trace separation is two minutes, and minute marks are 60 millimeters apart on the original record. Station TEC seismogram for February 10-12, 1976, Department of Solola. Figure 21-A, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0005 ID. GUATEMALA EARTHQUAKE 5 Guatemala Earthquake 1976. Station VIT (Vitalis) seismogram for February 25- 27, 1976, Department of Izabal. Figure 21-B., U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0006 ID. GUATEMALA EARTHQUAKE 6 Guatemala Earthquake 1976. Looking south towards linear trace of the Motagua fault (arrows on the left and right edges) in farmland west of Cabanas. Furrows with sinistral offset may be seen in the field on the left. 1976. Figure 24, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0007 ID. GUATEMALA EARTHQUAKE 7 Guatemala Earthquake 1976. Towards the north, showing rows in a cultivated field west of El Progresso that are offset 105 centimeters in a sinistral sense by the Motagua fault. 1976. Figure 25, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0008 ID. GUATEMALA EARTHQUAKE 8 Guatemala Earthquake 1976. Motagua fault trace crossing a soccer field at Gualan. Note characteristic right-stepping en echelon fractures and sinistral offset (89 centimeters) of white side line stripe on the right. 1976. Figure 26, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0009 ID. GUATEMALA EARTHQUAKE 9 Guatemala Earthquake 1976. East along fault trace at the most easterly locality visited on the ground. Fault trace trends along the base of the 5- meter high scrap in the foreground and through the fallen tree in the distance, which has a base diameter of 5 meters. The tree was split and toppled by fault movement of about 72 centimeters sinistral displacement and 37 centimeters displacement down to the north. The north facing steep scarp was probably formed by many repeated earlier movements along this same trace. 1976. Figure 27, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0010 ID. GUATEMALA EARTHQUAKE 10 Guatemala Earthquake 1976. Part of the village of Subinal, 7 kilometers west of El Progreso, showing destruction of adobe structures near the Motagua fault trace. The fault is a broad zone of ground cracks that cuts diagonally across the lower right corner. 1976. Figure 28, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0011 ID. GUATEMALA EARTHQUAKE 11 Guatemala Earthquake 1976. Fault displacement of a road about 4 kilometers northwest of Mixco. Note right lateral component of displacement. 1976. Figure 30, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0012 ID. GUATEMALA EARTHQUAKE 12 Guatemala Earthquake 1976. Fault damage to a house in Guatemala City. The roof (arrow), foundation, and sidewalk have been displaced vertically. 1976. Figure 31, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0013 ID. GUATEMALA EARTHQUAKE 13 Guatemala Earthquake 1976. Fault damage to the rear exterior wall and roof of a house in Guatemala City. Vertical displacement near the front of the house was 12 centimeters. 1976. Figure 32, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0014 ID. GUATEMALA EARTHQUAKE 14 Guatemala Earthquake 1976. Landslides in a steep road cut in stratified pumice and ash deposits at San Cristobal, west of Guatemala City. 1976. Figure 34, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0015 ID. GUATEMALA EARTHQUAKE 15 Guatemala Earthquake 1976. Northeastward along Rio Pixcaya, due north of Chimaltenango, showing numerous landslides in pyroclastic deposits. The river was partially dammed by a major landslide shown by arrow in the middle distance. 1976. Figure 35, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0016 ID. GUATEMALA EARTHQUAKE 16 Guatemala Earthquake 1976. Landslide in pyroclastic deposits near the edge of a steep-sided gully (barranco) in Guatemala City. Slides such as this (as shown by arrow) and their associated headwall cracking caused extensive damage to homes, roads, and other facilities in the northern part of the city. 1976. Figure 36, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0017 ID. GUATEMALA EARTHQUAKE 17 Guatemala Earthquake 1976. Landslide-dammed lake along Rio Pixcaya. The toe of the dam had been breached by the river by the time this photo was taken. February 13, 1976. Figure 37, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0018 ID. GUATEMALA EARTHQUAKE 18 Guatemala Earthquake 1976. Ground cracks and sand mounds (white patches) in unconsolidated alluvial deposits along the Motagua River north of Quebradas in the lower Motagua Valley. Ground cracks are believed to result from the liquefaction of water-saturated sediments and spreading towards the river channel. 1976. Figure 38, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0019 ID. GUATEMALA EARTHQUAKE 19 Guatemala Earthquake 1976. Linear sand mounds and circular-to-elliptical craters in the area of water-saturated unconsolidated deposits along the Motagua River. 1976. Figure 39, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0020 ID. GUATEMALA EARTHQUAKE 20 Guatemala Earthquake 1976. One of many landslides obstructing the main highway from Guatemala City to El Progreso. 1976. Figure 41, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0021 ID. GUATEMALA EARTHQUAKE 21 Guatemala Earthquake 1976. Rails bent in Gualan. 1976. Figure 42-A, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0022 ID. GUATEMALA EARTHQUAKE 22 Guatemala Earthquake 1976. Rails repaired between El Jicaro and Las Ovejas. Also shown is surface faulting with an east-west trend. Taken from a helicopter in a westward direction. 1976. Figure 42-B, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0023 ID. GUATEMALA EARTHQUAKE 23 Guatemala Earthquake 1976. Fault trace near Las Ovejas. 1976. Figure 42-D, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0024 ID. GUATEMALA EARTHQUAKE 24 Guatemala Earthquake 1976. Bent rails on the Puerto Barrios wharf. 1976. Figure 42-C, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0025 ID. GUATEMALA EARTHQUAKE 25 Guatemala Earthquake 1976. Sustained housing damage in the town of Joyabaj. 1976. Figure 46-A, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0026 ID. GUATEMALA EARTHQUAKE 26 Guatemala Earthquake 1976. Sustained damage in the town of Comalapa. 1976. Figure 46-D, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0027 ID. GUATEMALA EARTHQUAKE 27 Guatemala Earthquake 1976. Sustained building damage in the town of Tecpan. 1976. Figure 46-C, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0028 ID. GUATEMALA EARTHQUAKE 28 Guatemala Earthquake 1976. Housing damage in San Martin Jilotepeque. 1976. Figure 46-D, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0029 ID. GUATEMALA EARTHQUAKE 29 Guatemala Earthquake 1976. Puerto Barrios wharf, destroyed by the February 4 earthquake. Arrows point to the large warehouse partially submerged. 1976. Figure 47, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0030 ID. GUATEMALA EARTHQUAKE 30 Guatemala Earthquake 1976. Chimney collapse from a one-story house in Guatemala City. 1976. Figure 48, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0031 ID. GUATEMALA EARTHQUAKE 31 Guatemala Earthquake 1976. Head of large landslide (arrow) in Barranco de las Guacamayas, Guatemala City. 1976. Figure 49, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0032 ID. GUATEMALA EARTHQUAKE 32 Guatemala Earthquake 1976. Marble statue thrown 40 centimeters from its pedestal in Guatemala City. It is 120 centimeters high and weighs approximately 200 kilograms 1976. Portion of Figure 50, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0033 ID. GUATEMALA EARTHQUAKE 33 Guatemala Earthquake 1976. Damage to a wooden structure in Puerto Barrios, caused in part by ground compaction. Note the large offset of 11 centimeters. 1976. Figure 51, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0034 ID. GUATEMALA EARTHQUAKE 34 Guatemala Earthquake 1976. Collapse of the second story of a building at the Colegio San Javier, Guatemala City. 1976. Figure 52, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0035 ID. GUATEMALA EARTHQUAKE 35 Guatemala Earthquake 1976. Partial collapse of a three-story reinforced concrete structure in Guatemala City due to failure of columns in its second floor. 1976. Figure 53, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0036 ID. GUATEMALA EARTHQUAKE 36 Guatemala Earthquake 1976. Collapse of a new church, Iglesia del Divino Redentor, in Guatemala City. 1976. Figure 54, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0037 ID. GUATEMALA EARTHQUAKE 37 Guatemala Earthquake 1976. Collapse of the Hotel Terminal in Guatemala City, caused by the failure of reinforced concrete columns in its third story. 1976. Figure 55, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0038 ID. GUATEMALA EARTHQUAKE 38 Guatemala Earthquake 1976. Collapse of inverted pendulum gas station in Guatemala City. 1976. Figure 56, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0039 ID. GUATEMALA EARTHQUAKE 39 Guatemala Earthquake 1976. Collapse of an elevated steel water tank at the Instituto Tecnico Vocacional in Guatemala City. 1976. Figure 57, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0040 ID. GUATEMALA EARTHQUAKE 40 Guatemala Earthquake 1976. Collapse of an elevated steel water tank in Villanueva, Colonia de los Planes, 22 kilometers south of Guatemala City. 1976. Figure 59, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0041 ID. GUATEMALA EARTHQUAKE 41 Guatemala Earthquake 1976. Collapse of a corrugated steel grain silo in Villalobos, 5 kilometers southeast of Guatemala City. 1976. Figure 60, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0042 ID. GUATEMALA EARTHQUAKE 42 Guatemala Earthquake 1976. Severe damage to reinforced masonry construction caused by secondary faulting in Colonia San Francisco. The fault strikes north to northeast. 1976. Figure 62, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0043 ID. GUATEMALA EARTHQUAKE 43 Guatemala Earthquake 1976. Rupture across the San Jose Rosario Subdivision in Guatemala City. Fault with 13 centimeters vertical and 5 centimeters right lateral displacements. 1976. Figure 63, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0044 ID. GUATEMALA EARTHQUAKE 44 Guatemala Earthquake 1976. Collapse of three central spans of the Agua Caliente Bridge, kilometer 36 on the road to the Atlantic Ocean. This bridge was constructed in 1959. Photo by A.F. Espinosa, 1976. Figure 64, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0045 ID. GUATEMALA EARTHQUAKE 45 Guatemala Earthquake 1976. Benque Viejo Bridge on the verge of collapse after failure of supports is shown by arrow. 1976. Figure 65, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0046 ID. GUATEMALA EARTHQUAKE 46 Guatemala Earthquake 1976. Failure of a short column in a three-story framed, reinforced concrete structure in Guatemala City. 1976. Figure 66, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0047 ID. GUATEMALA EARTHQUAKE 47 Guatemala Earthquake 1976. Partial collapse of the protruding first-story structure of the Cruz Azul eleven-story reinforced concrete building in Guatemala City caused by falling (shown by arrows) of masonry walls from the two topmost stories. 1976. Figure 67, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0048 ID. GUATEMALA EARTHQUAKE 48 Guatemala Earthquake 1976. Collapse of a one-story reinforced concrete, framed structure in the Licorea Mixco. 1976. Figure 68, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0049 ID. GUATEMALA EARTHQUAKE 49 Guatemala Earthquake 1976. Massive destruction of some adobe houses in Antigua near the center of town. 1976. Figure 69-A, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0050 ID. GUATEMALA EARTHQUAKE 50 Guatemala Earthquake 1976. Large scale destruction of adobe houses in Guatemala City, Calle 2 and Avenida 9A. 1976. Figure 69-B, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0051 ID. GUATEMALA EARTHQUAKE 51 Guatemala Earthquake 1976. Collapse of an adobe house in Guatemala City, Calle 22A and 34 Avenida. 1976. Figure 69-C, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0052 ID. GUATEMALA EARTHQUAKE 52 Guatemala Earthquake 1976. Collapse of adobe houses in Guatemala City, Calle 22 and Avenida 32. 1976. Figure 69-D, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0053 ID. GUATEMALA EARTHQUAKE 53 Guatemala Earthquake 1976. Severe damage to flat beams and slab in the five- Story, reinforced concrete Edifico ELGIN in Guatemala City. 1976. Figure 70, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0055 ID. GUATEMALA EARTHQUAKE 55 Guatemala Earthquake 1976. International airport at Guatemala City. Some of the windows are broken. 1976. Figure 72, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0056 ID. GUATEMALA EARTHQUAKE 56 Guatemala Earthquake 1976. Hotel Terminal in Guatemala City. Columns in the second story collapsed, slowly enough to avoid loss of life. 1976. Figure 73, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0057 ID. GUATEMALA EARTHQUAKE 57 Guatemala Earthquake 1976. Typical collapsed column in the Hotel Terminal in Guatemala City. 1976. Figure 74, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0058 ID. GUATEMALA EARTHQUAKE 58 Guatemala Earthquake 1976. Collapsed second story in one unit of the Catholic Boys School in Guatemala City. The roofs were originally at the same level. 1976. Figure 75, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0059 ID. GUATEMALA EARTHQUAKE 59 Guatemala Earthquake 1976. Detail of column failure in the second story of the Catholic Boys School in Guatemala City. Story height is now measured in inches. 1976. Figure 76, U.S. Geological Survey Professional Paper 1002. #1:/Guatemala Earthquake 1976/gueq0060 ID. GUATEMALA EARTHQUAKE 60 Guatemala Earthquake 1976. Foundation failure due to a landslide beneath structures built along the edge of a steep walled valley in Guatemala City. An estimated 5,000 dwellings in this city were made uninhabitable or were threatened by sliding. Same as photo geq00034. February 4, 1976. #1:/Alaska Glaciers/gus00001 ID. Grant, U.S. 1 Alaska Glaciers. Valdez Glacier, which is northeast of Valdez in the Chugach Mountains, viewed from the southwest at a distance of about 1.5 miles. July 1, 1908. Plate 3-A, U.S. Geological Survey Bulletin 526. #1:/Alaska-Glaciers/gus00005 ID. Grant, U.S. 5 Alaska Glaciers. East side of Valdez Glacier looking northeast. Valdez district, Alaska Gulf region, Alaska. July 11,1908. #1:/Alaska-Glaciers/gus00006 ID. Grant, U.S. 6 Alaska Glaciers. Detail of front of Valdez Glacier to show drift. Valdez district, Alaska Gulf region, Alaska. July 11,1908. #1:/Alaska Glaciers/gus00010 ID. Grant, U.S. 10 Alaska Glaciers. North part of the front of Shoup Glacier, which is west of Valdez in the Chugach Mountains. July 13, 1908. Plate 5-A, U.S. Geological Survey Bulletin 526. #1:/Alaska Glaciers/gus00011 ID. Grant, U.S. 11 Alaska Glaciers. Middle part of Shoup Glacier, which is west of Valdez in the Chugach Mountains. July 13, 1908. #1:/Alaska-Bulletin 526/gus00012 ID. Grant, U.S. 12 South part of front of Shoup Glacier, from point A. Valdez district, Alaska Gulf region, Alaska. July 13, 1908. Plate 5-B in U.S. Geological Survey. Bulletin 526. 1913. #1:/Alaska-Bulletin 443/gus00014 ID. Grant, U.S. 14 Ellamar mine at Ellamar, Prince William Sound, Alaska. July 1908. Plate 10-A in U.S. Geological Survey. Bulletin 443. 1910. #1:/Alaska-Glaciers/gus00015 ID. Grant, U.S. 15 Alaska Glaciers. Front, (east side of island) of Columbia Glacier, showing banding in ice. Valdez district, Alaska Gulf region, Alaska. July 15,1908. #1:/Alaska-Glaciers/gus00016 ID. Grant, U.S. 16 Alaska Glaciers. Columbia Glacier, overriding moraine, viewed from east on island on which glacier rests. Valdez district, Alaska Gulf region, Alaska. July 15,1908. #1:/Alaska-Bulletin 526/gus00017 ID. Grant, U.S. 17 Edge of Columbia Glacier, shows, fluted moraine and overturned forest. Valdez district, Alaska Gulf region, Alaska. July 15, 1908. Plate 8-B in U.S. Geological Survey. Bulletin 526. 1913. #1:/Alaska-Glaciers/gus00018 ID. Grant, U.S. 18 Alaska Glaciers. End of Columbia glacier but to the north of Grant 17, showing ice front. Valdez district, Alaska Gulf region, Alaska. July 15,1908. #1:/Alaska-Glaciers/gus00019 ID. Grant, U.S. 19 Alaska Glaciers. Front of Columbia Glacier looking west from island on which ice rests. Valdez district, Alaska Gulf region, Alaska. July 15,1908. #1:/Alaska-Glaciers/gus00020 ID. Grant, U.S. 20 Alaska Glaciers. Kettles and moraine at front of Columbia Glacier on island on which glacier rests. Valdez district, Alaska Gulf region, Alaska. July 15,1908 #1:/Alaska-Glaciers/gus00021 ID. Grant, U.S. 21 Alaska Glaciers. Kettles and moraine at front of Columbia Glacier on island on which glacier rests. Valdez district, Alaska Gulf region, Alaska. July 15,1908. #1:/Alaska-Bulletin 443/gus00025 ID. Grant, U.S. 25 Dock and ore bunkers of the Bonanza mine on La Touche Island, Prince William Sound, Alaska. July 1908. Plate 11-B in U.S. Geological Survey. Bulletin 443. 1910. #1:/Alaska-Bulletin 443/gus00027 ID. Grant, U.S. 27 Quarry face of the Bonanza mine on La Touche Island, Prince William Sound, Alaska. July 1908. Plate 11-A in U.S. Geological Survey. Bulletin 443. 1910. #1:/Alaska-Bulletin 443/gus00031 ID. Grant, U.S. 31 Glaciated mountains and fiords, north end of Knight Island, looking north along Louis Bay, the topography is typical for districts underlain by greenstone of the Orca group. Prince William Sound, Alaska. 1905. Plate 6-A in U.S. Geological Survey. Bulletin 443. 1910. #1:/Alaska-Glaciers/gus00039 ID. Grant, U.S. 39 Alaska Glaciers. Glacier west side of Port Bainbridge, first from south, focus point center of glacier, and about 3 miles distant just north of entrance to second bay from northwest end of Bainbridge Island. Wells district, Alaska Gulf region, Alaska. August 2, 1908. #1:/Alaska-Bulletin 526/gus00040 ID. Grant, U.S. 40 Front of Bainbridge Glacier, from point A. La Touche district, Alaska Gulf region, Alaska. August 3, 1908. Plate 27-A in U.S. Geological Survey. Bulletin 526. 1913. #1:/Alaska-Bulletin 526/gus00041 ID. Grant, U.S. 41 Ice front, push moraine and dead trees at north side of front of Bainbridge Glacier. La Touche district, Alaska Gulf region, Alaska. August 3, 1908. Plate 30-A in U.S. Geological Survey. Bulletin 526. 1913. #1:/Alaska-Glaciers/gus00042 ID. Grant, U.S. 42 Seracs, from Bainbridge Glacier. Wells district, Alaska Gulf region, Alaska. August 3, 1908. #1:/Alaska-Bulletin 526/gus00043 ID. Grant, U.S. 43 South part of front of Bainbridge Glacier, from point B. La Touche district, Alaska Gulf region, Alaska. August 3, 1908. Plate 27-A in U.S. Geological Survey. Bulletin 526. 1913. #1:/Alaska-Glaciers/gus00044 ID. Grant, U.S. 44 Alaska Glaciers. Glacier in south arm of Icy Bay, from northwest corner of island about 1.5 miles distant. Valdez district, Alaska Gulf region, Alaska. August 5, 1908. #1:/Alaska Glaciers/gus00045 ID. Grant, U.S. 45 Alaska Glaciers. Tiger Glacier on the south arm of Icy Bay on the Kenai Peninsula. August 6, 1908. Plate 27-B, U.S. Geological Survey Bulletin 526. #1:/Alaska Glaciers/gus00046 ID. Grant, U.S. 46 Alaska Glaciers. Chenega Glacier and another glacier to the right on the Kenai Peninsula west of Chenega in the Chugach Mountains. August 5, 1908. Photos gus00046 and gus00047 form a panorama. #1:/Alaska Glaciers/gus00047 ID. Grant, U.S. 47 Alaska Glaciers. Chenega Glacier and another glacier to the right on the Kenai Peninsula west of Chenega in the Chugach Mountains. August 5, 1908. Photos gus00046 and gus00047 form a panorama. #1:/Alaska-Bulletin 526/gus00048 ID. Grant, U.S. 48 Chenega and Princeton Glaciers, from point C, Chenega on left. La Touche district, Alaska Gulf region, Alaska. August 5, 1908. Plate 27-A in U.S. Geological Survey. Bulletin 526. 1913. #1:/Alaska-Glaciers/gus00049 ID. Grant, U.S. 49 Alaska Glaciers. Nellie Juan glacier from north end of island about 4 miles distant. Wells district, Alaska Gulf region, Alaska. 1#1:00 AM, August 8, 1908. #1:/Alaska-Glaciers/gus00050 ID. Grant, U.S. 50 Alaska Glaciers. Glacier at head of bay northeast Nellie Juan Glacier, from distance of about 1.5 miles. Wells district, Alaska Gulf region, Alaska. August 8, 1908. #1:/Alaska-Bulletin 526/gus00051 ID. Grant, U.S. 51 Front of Nellie Juan Glacier, from point A, the summit of a granite knob at the west side of the glacier front. La Touche district, Alaska Gulf region, Alaska. August 8, 1908. Plate 26-A in U.S. Geological Survey. Bulletin 526. 1913. #1:/Alaska-Bulletin 526/gus00052 ID. Grant, U.S. 52 West side of Nellie Juan Glacier, from point A. La Touche district, Alaska Gulf region, Alaska. August 8, 1908. Plate 26-B in U.S. Geological Survey. Bulletin 526. 1913. #1:/Alaska/gus00053 ID. Grant, U.S. 53 Moraine, forest and forestless zone near Nellie Juan Glacier. Wells district, Alaska Gulf region, Alaska. August 8, 1908. #1:/Alaska/gus00054 ID. Grant, U.S. 54 General overview, moraine, forest and forestless zone near Nellie Juan Glacier Wells district, Alaska Gulf region, Alaska. August 8, 1908. #1:/Alaska-Glaciers/gus00055 ID. Grant, U.S. 55 Alaska Glaciers. Nellie Juan Glacier from boat about 2 miles north of glacier and on west side bay. Wells district, Alaska Gulf region, Alaska. August 8, 1908. #1:/Alaska Glaciers/gus00056 ID. Grant, U.S. 56 Alaska Glaciers. Tidewater glacier on the west side of Port Nellie Juan, viewed from a small island on the east side of the port half a mile south of the entrance to the southwest part of the port. August 8, 1908. #1:/Alaska-Glaciers/gus00057 ID. Grant, U.S. 57 Alaska Glaciers. Small tide water glacier on east side of southwest part of Port Nellie Juan. Wells district, Alaska Gulf region, Alaska. August 8, 1908. #1:/Alaska-Glaciers/gus00060 ID. Grant, U.S. 60 Alaska Glaciers. East side of front of Barry Glacier. Wells district, Alaska Gulf region, Alaska. August 11, 1908. #1:/Alaska-Glaciers/gus00061 ID. Grant, U.S. 61 Alaska Glaciers. East side of front of Barry Glacier. Wells district, Alaska Gulf region, Alaska. August 11, 1908. #1:/Alaska/gus00062 ID. Grant, U.S. 62 Mountains of west side Resurrection Bay, Seward district, Alaska Gulf region, Alaska. August 21, 1908. #1:/Alaska/gus00063 ID. Grant, U.S. 63 Mountains head of Thumb Cove, Resurrection Bay, Seward district, Alaska Gulf region, Alaska. August 21, 1908. #1:/Alaska-Glaciers/gus00064 ID. Grant, U.S. 64 Alaska Glaciers. Hanging glacier between peaks marked 4350 and 4300. Seward district, Alaska Gulf region, Alaska. August 21, 1908. #1:/Alaska Glaciers/gus00058 ID. Grant, U.S. 58 Alaska Glaciers. North front of a tidewater glacier and deforested zone of the glacier on the west side of Port Nellie Juan. August 9, 1908. #1:/Alaska-Bulletin 526/gus00082 ID. Grant, U.S. 82 East part of front of Columbia Glacier terminal moraine and remnant of forest, from point B. Valdez district, Alaska Gulf region, Alaska. June 24, 1909. Plate 12-A in U.S. Geological Survey. Bulletin 526. 1913. #1:/Alaska-Bulletin 526/gus00083 ID. Grant, U.S. 83 East part of front of Columbia Glacier, bare zone, and overturned forest, from point C. Valdez district, Alaska Gulf region, Alaska. June 24, 1909. Plate 11-B in U.S. Geological Survey. Bulletin 526. 1913. #1:/Alaska-Bulletin 526/gus00086 ID. Grant, U.S. 86 Edge of Columbia Glacier, shows, fluted moraine and overturned forest. Valdez district, Alaska Gulf region, Alaska. June 24, 1909. Plate 9-B in U.S. Geological Survey. Bulletin 526. 1913. #1:/Alaska-Bulletin 526/gus00087 ID. Grant, U.S. 87 Columbia Glacier invading forest. West shore of island on which glacier rests. Valdez district, Alaska Gulf region, Alaska. June 24, 1909. Plate 10-A in U.S. Geological Survey. Bulletin 526. 1913. #1:/Alaska-Bulletin 526/gus00088 ID. Grant, U.S. 88 West part of front of Columbia Glacier, from point E. Valdez district, Alaska Gulf region, Alaska. June 24, 1909. Plate 11-A in U.S. Geological Survey. Bulletin 526. 1913. #1:/Alaska-Bulletin 526/gus00091 ID. Grant, U.S. 91 West part of front of Columbia Glacier. Valdez district, Alaska Gulf region, Alaska. June 24, 1909. Plate 7-B in U.S. Geological Survey. Bulletin 526. 1913. #1:/Alaska Glaciers/gus00093 ID. Grant, U.S. 93 Alaska Glaciers. Lois Glacier (Brilliant Glacier), which is west of Valdez in the Chugach Mountains, viewed from the east side of Unakwik Bay looking northeast. June 26, 1909. #1:/Alaska Glaciers/gus00094 ID. Grant, U.S. 94 Alaska Glaciers. North side of Meares Glacier on Unakwik Bay west of Valdez in the Chugach Mountains, looking north. June 26, 1909. #1:/Alaska Glaciers/gus00095 ID. Grant, U.S. 95 Alaska Glaciers. South side of Meares Glacier on Unakwik Bay west of Valdez in the Chugach Mountains, looking east. June 26, 1909. #1:/Alaska Glaciers/gus00096 ID. Grant, U.S. 96 Alaska Glaciers. Meares Glacier on Unakwik Bay west of Valdez in the Chugach Mountains. Plate 12-B, U.S. Geological Survey Bulletin 526. #1:/Alaska-Bulletin 526/gus00098 ID. Grant, U.S. 98 Center and west part of front of Barry Glacier, from point A. The waterfall at the left is just visible at the extreme left in Paige 685. Wells district, Alaska Gulf region, Alaska. June 29, 1909. Plate 20-B in U.S. Geological Survey. Bulletin 526. 1913. #1:/Alaska-Bulletin 526/gus00099 ID. Grant, U.S. 99 East part of front of Barry Glacier, from point A, Wells district, Alaska Gulf region, Alaska. June 29, 1909. Plate 19-B in U.S. Geological Survey. Bulletin 526. 1913. #1:/Alaska Glaciers/gus00104 ID. Grant, U.S. 104 Alaska Glaciers. Surprise Glacier in Mount McKinley National Park. Detached Glacier on the right. June 29, 1909. Plate 21-B, U.S. Geological Survey Bulletin 526. Photos gus00104 and gus00105 form a panorama. #1:/Alaska Glaciers/gus00105 ID. Grant, U.S. 105 Alaska Glaciers. Baker Glacier, looking northwest. Mount Muir in the background. Detached Glacier on the left. June 29, 1909. Plate 21-A, U.S. Geological Survey Bulletin 526. Photos gus00104 and gus00105 form a panorama. #1:/Alaska-Bulletin 526/gus00106 ID. Grant, U.S. 106 East part of front of Harriman Glacier, from point H. Dirty Glacier on left. La Touche district, Alaska Gulf region, Alaska. June 29, 1909. Plate 22-B in U.S. Geological Survey. Bulletin 526. 1913. #1:/Alaska-Bulletin 526/gus00107 ID. Grant, U.S. 107 Cataract Glacier. Wells district, Alaska Gulf region, Alaska. June 30, 1909. Plate 22-A in U.S. Geological Survey. Bulletin 526. 1913. #1:/Alaska Glaciers/gus00108 ID. Grant, U.S. 108 Alaska Glaciers. West of Barry Glacier in the Chugach Mountains, looking northwest. June 30, 1909. #1:/Alaska Glaciers/gus00109 ID. Grant, U.S. 109 Alaska Glaciers. East part of the front of Harvard Glacier, which is northwest of Valdez in the Chugach Mountains, looking northeast. July 1, 1909. Plate 14-B, U.S. Geological Survey Bulletin 526. #1:/Alaska Glaciers/gus00110 ID. Grant, U.S. 110 Alaska Glaciers. West part of Harvard Glacier, which is northwest of Valdez in the Chugach Mountains. July 1, 1909. #1:/Alaska Glaciers/gus00111 ID. Grant, U.S. 111 Alaska Glaciers. Bryn Mawr Glacier, which is northwest of Valdez in the Chugach Mountains, looking southwest. July 1, 1909. #1:/Alaska Glaciers/gus00112 ID. Grant, U.S. 112 Alaska Glaciers. Part of the front of Tebenkof Glacier, which is on the Kenai Peninsula east of Whittier in the Chugach Mountains, looking south. July 5, 1909. #1:/Alaska Glaciers/gus00113 ID. Grant, U.S. 113 Alaska Glaciers. West part of the front of Tebenkof Glacier, which is on the Kenai Peninsula east of Whittier in the Chugach Mountains, looking southwest. July 5, 1909. Plate 23-B, U.S. Geological Survey Bulletin 526. #1:/Alaska Glaciers/gus00114 ID. Grant, U.S. 114 Alaska Glaciers. East part of the front of Tebenkof Glacier, which is on the Kenai Peninsula east of Whittier in the Chugach Mountains, looking southwest. July 5, 1909. Plate 24-A, U.S. Geological Survey Bulletin 526. #1:/Alaska Glaciers/gus00115 ID. Grant, U.S. 115 Alaska Glaciers. Blackstone Glacier, which is near Blackstone Bay and south of Whittier in the Chugach Mountains, looking southeast. July 5, 1909. #1:/Alaska Glaciers/gus00117 ID. Grant, U.S. 117 Alaska Glaciers. Puget Glacier, which is on the Kenai Peninsula southeast of Seward in the Chugach Mountains, looking north. July 11, 1909. Plate 30-B, U.S. Geological Survey Bulletin 526. #1:/Alaska Glaciers/gus00119 ID. Grant, U.S. 119 Alaska Glaciers. East side of Blackstone Glacier, which is near Blackstone Bay and south of Whittier in the Chugach Mountains, looking north. July 11, 1909. #1:/Alaska Glaciers/gus00121 ID. Grant, U.S. 121 Alaska Glaciers. Ellsworth Glacier, which is on the Kenai Peninsula southeast of Seward in the Chugach Mountains, looking northwest. July 12, 1909. Plate 31-A, U.S. Geological Survey Bulletin 526. #1:/Kenai Fjords National Park/gus00122 ID. Grant, U.S. 122 Kenai Fjords National Park, Alaska. East side of Bear Glacier, looking northwest. July 20, 1909. #1:/Kenai Fjords National Park/gus00123 ID. Grant, U.S. 123 Kenai Fjords National Park, Alaska. East part of the front of Bear Glacier, viewed from Bulldog Cove near the east park boundary. July 20, 1909. Plate 31-B, U.S. Geological Survey Bulletin 526. #1:/Kenai Fjords National Park/gus00124 ID. Grant, U.S. 124 Kenai Fjords National Park, Alaska. West part of the front of Bear Glacier, viewed from Bulldog Cove. July 21, 1909. Plate 32-A, U.S. Geological Survey Bulletin 526. #1:/Kenai Fjords National Park/gus00128 ID. Grant, U.S. 128 Kenai Fjords National Park, Alaska. Aialik Glacier, looking west. July 23, 1909. Photos gus00128 and gus00129 form a panorama. #1:/Kenai Fjords National Park/gus00129 ID. Grant, U.S. 129 Kenai Fjords National Park, Alaska. Aialik Glacier, looking west. July 23, 1909. Photos gus00128 and gus00129 form a panorama. #1:/Kenai Fjords National Park/gus00130 ID. Grant, U.S. 130 Kenai Fjords National Park, Alaska. North part of the front of Pederson Glacier on the west side of Aialik Bay. July 23, 1909. Plate 34-B, U.S. Geological Survey Bulletin 526. #1:/Kenai Fjords National Park/gus00131 ID. Grant, U.S. 131 Kenai Fjords National Park, Alaska. South side of Pederson Glacier on the side of Aialik Bay. July 23, 1909. #1:/Kenai Fjords National Park/gus00132 ID. Grant, U.S. 132 Kenai Fjords National Park, Alaska. Holgate Glacier. July 24, 1909. Plate 35-A, U.S. Geological Survey Bulletin 526. See Photo No. mbf00004 for matching pair. #1:/Kenai Fjords National Park/gus00133 ID. Grant, U.S. 133 Kenai Fjords National Park, Alaska. Holgate Glacier. July 24, 1909. Photos gus00133 (north) and gus00134 (south) form a panorama. #1:/Kenai Fjords National Park/gus00134 ID. Grant, U.S. 134 Kenai Fjords National Park, Alaska. Holgate Glacier. July 24, 1909. Photos gus00133 (north) and gus00134 (south) form a panorama. #1:/Kenai Fjords National Park/gus00137 ID. Grant, U.S. 137 Kenai Fjords National Park, Alaska. East part of the front of Northwestern Glacier. July 26, 1909. Plate 36-A, U.S. Geological Survey Bulletin 526. #1:/Kenai Fjords National Park/gus00138 ID. Grant, U.S. 138 Kenai Fjords National Park, Alaska. Northwestern Glacier, viewed from a point one mile northeast of the north end of the granite island 5 miles long at the east entrance to Harris Bay. July 27, 1909. Plate 35-B, U.S. Geological Survey Bulletin 526. #1:/Kenai Fjords National Park/gus00140 ID. Grant, U.S. 140 Kenai Fjords National Park, Alaska. West part of the front of Northwestern Glacier. July 26, 1909. Plate 36-B, U.S. Geological Survey Bulletin 526. #1:/Kenai Fjords National Park/gus00142 ID. Grant, U.S. 142 Kenai Fjords National Park, Alaska. McCarty Glacier, looking north. July 30, 1909. #1:/Kenai Fjords National Park/gus00143 ID. Grant, U.S. 143 Kenai Fjords National Park, Alaska. East part of McCarty Glacier. July 30, 1909. Plate 37-A, U.S. Geological Survey Bulletin 526. See Photo No. mbf00014 for matching pair. #1:/Kenai Fjords National Park/gus00144 ID. Grant, U.S. 144 Kenai Fjords National Park, Alaska. Central part of McCarty Glacier. July 30, 1909. Plate 37-B, U.S. Geological Survey Bulletin 526. See Photo No. mbf00006 for matching pair. #1:/Kenai Fjords National Park/gus00145 ID. Grant, U.S. 145 Kenai Fjords National Park, Alaska. East part of the front of Yalik Glacier. August 7, 1909. Plate 39-A, U.S. Geological Survey Bulletin 526. #1:/Alaska-Bulletin 587/gus00149 ID. Grant, U.S. 149 Lower Jurassic tuffs on north shore of Port Graham; note small normal fault at lower end of white stratum. Seldovia district, Cook Inlet region, Alaska. C. 1909. Plate 16-B in U.S. Geological Survey. Bulletin 587. 1915. #1:/Alaska-Bulletin 587/gus00153 ID. Grant, U.S. 153 Contorted chert on east shore of Seldovia bay near cannery. Seldovia district, Cook Inlet region, Alaska. C. 1909. Plate 17-A in U.S. Geological Survey. Bulletin 587. 1915. #1:/Alaska-Bulletin 587/gus00155 ID. Grant, U.S. 155 Ellipsodial lava on east shore of Seldovia Bay. Seldovia district, Cook Inlet region, Alaska. C. 1909. Plate 16-A in U.S. Geological Survey. Bulletin 587. 1915. #1:/Alaska-Bulletin 443/gus00173 ID. Grant, U.S. 173 Elevated beach Glacier Bay, Prince William Sound, Alaska. 1905. Plate 6-B in U.S. Geological Survey. Bulletin 443. 1910. #1:/Alaska-Bulletin 526/gus00183 ID. Grant, U.S. 183 Push moraine at front of Columbia Glacier, west shore of island on which glacier rests. Valdez district, Alaska Gulf region, Alaska. June 24, 1909. Plate 10-B in U.S. Geological Survey. Bulletin 526. 1913. #1:/Alaska Glaciers/gus00185 ID. Grant, U.S. 185 Alaska Glaciers. Part of Columbia Glacier, which is west of Valdez in the Chugach Mountains, looking north at #1:30 p.m. Photo by D.F. Higgins, June 24, 1909. #1:/Alaska Glaciers/gus00193 ID. Grant, U.S. 193 Alaska Glaciers. Cataract Glacier and Surprise Glacier, southeast of Anchorage. Photo by D.F. Higgins, June 29, 1909. Photos gus00193, gus00194, gus00195, and gus00196 form Plate 18, U.S. Geological Survey Bulletin 526. #1:/Alaska Glaciers/gus00194 ID. Grant, U.S. 194 Alaska Glaciers. Surprise Glacier and Palache (Baker) Glacier, southeast of Anchorage. Photo by D.F. Higgins, June 29, 1909. Photos gus00193, gus00194, gus00195, and gus00196 form Plate 18, U.S. Geological Survey Bulletin 526. #1:/Alaska Glaciers/gus00195 ID. Grant, U.S. 195 Alaska Glaciers. Serpentine Glacier, which is east of Anchorage in the Chugach Mountains. Photo by D.F. Higgins, June 29, 1909. Photos gus00193, gus00194, gus00195, and gus00196 form Plate 18, U.S. Geological Survey Bulletin 526. #1:/Alaska Glaciers/gus00196 ID. Grant, U.S. 196 Alaska Glaciers. Head of Serpentine Glacier, which is east of Anchorage in the Chugach Mountains. Mount Gilbert just left of center. Photos gus00193, gus00194, gus00195, and gus00196 form Plate 18, U.S. Geological Survey Bulletin 526. #1:/Alaska Glaciers/gus00197 ID. Grant, U.S. 197 Alaska Glaciers. Serpentine Glacier, which is east of Anchorage in the Chugach Mountains. Mount Gilbert just right of center. Photo by D.F. Higgins, June 29, 1909. Photos gus00197 and gus00198 form a panorama. #1:/Alaska Glaciers/gus00198 ID. Grant, U.S. 198 Alaska Glaciers. Palache Glacier (Baker Glacier), which is east of Anchorage in the Chugach Mountains. Mount Gilbert just right of center. Photo by D.F. Higgins, June 29, 1909. Photos gus00197 and gus00198 form a panorama. #1:/Alaska Glaciers/gus00199 ID. Grant, U.S. 199 Alaska Glaciers. Harriman Glacier, which is northeast of Whittier in the Chugach Mountains. Conglomerate boulder on the beach. Photo by D.F. Higgins, June 29, 1909. #1:/Alaska-Bulletin 526/gus00206 ID. Grant, U.S. 206 Bryn Mawr Glacier from end of College Point. Valdez distict, Alaska Gulf region, Alaska. July 1, 1909. Plate 16-B in U.S. Geological Survey. Bulletin 526. 1913. #1:/Alaska-Bulletin 526/gus00207 ID. Grant, U.S. 207 Harvard Glacier, from point K. The glacier on the left is the Radcliffe. Valdez distict, Alaska Gulf region, Alaska. July 1, 1909. Plate 15-A in U.S. Geological Survey. Bulletin 526. 1913. #1:/Alaska-Bulletin 526/gus00208 ID. Grant, U.S. 208 West part of front of Harvard Glacier, from point L. The glacier on the left, not reaching tidewater, is the Baltimore and the large ice stream joining the Harvard Glacier is the Radcliffe. Valdez distict, Alaska Gulf region, Alaska. July 1, 1909. Plate 14-A in U.S. Geological Survey. Bulletin 526. 1913. See Photo No. mbf00002 for matching pair. #1:/Alaska-Bulletin 526/gus00210 ID. Grant, U.S. 210 West side of College Fiord from Point L. Bryn Mawr Glacier in center, Smith Glacier on right. Valdez distict, Alaska Gulf region, Alaska. July 1, 1909. Plate 16-A in U.S. Geological Survey. Bulletin 526. 1913. #1:/Alaska Glaciers/gus00202 ID. Grant, U.S. 202 Alaska Glaciers. East side of Yale Glacier, which is west of Valdez in the Chugach Mountains, viewed from a small rock knob with cairn. Photo by D.F. Higgins, July 1, 1909. Plate 13-A, U.S. Geological Survey Bulletin 526. Photos gus00202 and gus00203 form a panorama. #1:/Alaska Glaciers/gus00203 ID. Grant, U.S. 203 Alaska Glaciers. West side of Yale Glacier, which is west of Valdez in the Chugach Mountains, viewed from a small rock knob with cairn. Photo by D.F. Higgins, July 1, 1909. Plate 13-B, U.S. Geological Survey Bulletin 526. Photos gus00202 and gus00203 form a panorama. #1:/Kenai Fjords National Park/gus00219 ID. Grant, U.S. 219 Kenai Fjords National Park, Alaska. Three-hole point on the east side of Aialik Bay. July 22, 1909. #1:/Kenai Fjords National Park/gus00220 ID. Grant, U.S. 220 Kenai Fjords National Park, Alaska. South part of Aialik Glacier. Photo by D.F. Higgins, July 23, 1909. Plate 34-A, U.S. Geological Survey Bulletin 526. Photos gus00220 and gus00221 possibly form a panorama. #1:/Kenai Fjords National Park/gus00221 ID. Grant, U.S. 221 Kenai Fjords National Park, Alaska. North part of Aialik Glacier. Photo by D.F. Higgins, July 23, 1909. Plate 32-B, U.S. Geological Survey Bulletin 526. Photos gus00220 and gus00221 possibly form a panorama. #1:/Kenai Fjords National Park/gus00228 ID. Grant, U.S. 228 Kenai Fjords National Park, Alaska. West side of McCarty Glacier. Photo by D.F. Higgins, July 30, 1909. Plate 38-A, U.S. Geological Survey Bulletin 526. #1:/Kenai Fjords National Park/gus00231 ID. Grant, U.S. 231 Kenai Fjords National Park, Alaska. Split Glacier, viewed from very near its front. Photo by D.F. Higgins, August 2, 1909. #1:/Kenai Fjords National Park/gus00232 ID. Grant, U.S. 232 Kenai Fjords National Park, Alaska. Split Glacier, possibly viewed from its terminal moraine. Photo by D.F. Higgins, August 2, 1909. #1:/Kenai Fjords National Park/gus00233 ID. Grant, U.S. 233 Kenai Fjords National Park, Alaska. Split Glacier. Photo by D.F. Higgins, August 2, 1909. Plate 38-B, U.S. Geological Survey Bulletin 526. #1:/Kenai Fjords National Park/gus00234 ID. Grant, U.S. 234 Kenai Fjords National Park, Alaska. Split Glacier, viewed from a boat about 4 miles distant. Photo by D.F. Higgins, August 3, 1909. #1:/Kenai Fjords National Park/gus00236 ID. Grant, U.S. 236 Kenai Fjords National Park, Alaska. Yalik Glacier, viewed from Nuka Passage. August 7, 1909. #1:/Kenai Fjords National Park/gus00237 ID. Grant, U.S. 237 Kenai Fjords National Park, Alaska. West side of Petrof Glacier on Nuka Passage. Photo by D.F. Higgins, August 8, 1909. #1:/Kenai Fjords National Park/gus00238 ID. Grant, U.S. 238 Kenai Fjords National Park, Alaska. East part of the front of Petrof Glacier. Photo by D.F. Higgins, August 8, 1909. Plate 39-B, U.S. Geological Survey Bulletin 526. #1:/Kenai Fjords National Park/gus00239 ID. Grant, U.S. 239 Kenai Fjords National Park, Alaska. Small ridges in front of Petrof Glacier. Photo by D.F. Higgins, August 8, 1909. Plate 40-B, U.S. Geological Survey Bulletin 526. #1:/Kenai Fjords National Park/gus00240 ID. Grant, U.S. 240 Kenai Fjords National Park, Alaska. West part of the front of Petrof Glacier. Photo by D.F. Higgins, August 8, 1909. Plate 40-A, U.S. Geological Survey Bulletin 526. #1:/Denali National Park and Preserve/hca00183 ID. Hickcox, C.A. 183 Denali National Park and Preserve, Alaska. Cabin and cache at the ranger station on Savage River. July 31, 1946. #1:/Denali National Park and Preserve/hca00194 ID. Hickcox, C.A. 194 Denali National Park and Preserve, Alaska.U.S. Geological Survey camp on Teklanika River at the north edge of the park. August 5, 1946. #1:/Denali National Park and Preserve/hca00205 ID. Hickcox, C.A. 205 Denali National Park and Preserve, Alaska. Hotel lobby at McKinley Park. August 17, 1946. #1:/Denali National Park and Preserve/hca00207 ID. Hickcox, C.A. 207 Denali National Park and Preserve, Alaska. Cantwell Formation (lower Cretaceous), south from McKinley Park Highway just east of Igloo Creek. August 18, 1946. #1:/Denali National Park and Preserve/hca00209 ID. Hickcox, C.A. 209 Denali National Park and Preserve, Alaska. Alaska Range, south from Polychrome Pass on the highway. August 18, 1946. #1:/Denali National Park and Preserve/hca00211 ID. Hickcox, C.A. 211 Denali National Park and Preserve, Alaska. Mt. McKinley, viewed from Highway Pass. August 18, 1946. Photos hca00211 and hca00212 form a panorama. #1:/Denali National Park and Preserve/hca00214 ID. Hickcox, C.A. 214 Denali National Park and Preserve, Alaska. Mount McKinley, viewed from Highway Pass. August 18, 1946. #1:/Denali National Park and Preserve/hca00216 ID. Hickcox, C.A. 216 Denali National Park and Preserve, Alaska. Mount Eielson, viewed from Eielson Camp. August 18, 1946. #1:/Hunt C.B. Collection-Factory Butte Coal Mine/hcb00363 ID. Hunt, C.B. 363 Old entry of the Factory Butte Coal Mine. The thin sandstone above the coal is topmost ferron. Upper Mancos shale forms most of the hill above the coal. The coal bad is 8 feet thick. Wayne County, Utah. 1935. Figure 18-A in U.S. Geological Survey Professional Paper 228. 1953. #1:/Hunt C.B. Collection-Factory Butte Coal Mine/hcb00364 ID. Hunt, C.B. 364 New entry for the Factory Butte Coal Mine. The coal bed is 8 feet thick. Wayne County, Utah. 1935. #1:/Hunt C.B. Collection-Factory Butte Coal Mine/hcb00365 ID. Hunt, C.B. 365 The Factory Butte Coal Mine, mining an 8-foot bed of coal, has a sandstone roof properly supported here with timbers. Wayne County, Utah. 1935. #1:/Death Valley National Park/hcb00904 ID. Hunt, C.B. 904 Death Valley National Park, California. Crystal Spring Formation in Galena Canyon. View is northwest. Labeled photograph: quartzite member (Q); purple shale and thin-bedded dolomite (sd); diabase sill (di) with talcose beds (T) where the sill is in contact with dolomite; massive dolomite (do) at the top of the formation. In the distance is Noonday Dolomite (pCn) capped by Johnnie Formation (pcj). Circa 1960. Figure 7, U.S. Geological Survey Professional Paper 494-A. #1:/Death Valley National Park/hcb00905 ID. Hunt, C.B. 905 Death Valley National Park, California. Noonday Dolomite, showing structures of Scolithus tubes at the east foot of the mountain at the spur south of Galena Canyon. Circa 1960. Figure 9, U.S. Geological Survey Professional Paper 494-A. #1:/Death Valley National Park/hcb00906 ID. Hunt, C.B. 906 Death Valley National Park, California. Johnnie Formation on the north side of Six Spring Canyon. The hilltops are capped by Stirling Quartzite. The dark beds forming the upper half of the hillside are the purple shale member The light beds in the middle and lower half are the shale member capped by dolomite. Circa 1960. Figure 11, U.S. Geological Survey Professional Paper 494-A. #1:/Death Valley National Park/hcb00907 ID. Hunt, C.B. 907 Death Valley National Park, California. Bedding in Stirling Quartzite at the mouth of Johnson Canyon. Beds are 3 to 12 inches thick. Circa 1960. Figure 13, U.S. Geological Survey Professional Paper 494-A. #1:/Death Valley National Park/hcb00908 ID. Hunt, C.B. 908 Death Valley National Park, California. Interbedded shale, quartzite, and dolomite in the upper part of the Wood Canyon Formation in the ridge along the north side of Blackwater Wash. The thick bed in the upper right is dolomite; below this is quartzite and shale. Circa 1960. Figure 15, U.S. Geological Survey Professional Paper 494-A. #1:/Death Valley National Park/hcb00909 ID. Hunt, C.B. 909 Death Valley National Park, California. Cambrian formations at the mouth of Death Valley Canyon. View is north. In the left foreground is Zabriskie Quartzite (Cz). To the right of this and below the flat fault are 1,000 feet of shale and limestone of the Carrara Formation (Cc). The upper plate of the fault is mostly thick-bedded dolomite belonging to the Bonanza King and Nopah Formations (Cbn). Circa 1960. Figure 18, U.S. Geological Survey Professional Paper 494-A. #1:/Death Valley National Park/hcb00910 ID. Hunt, C.B. 910 Death Valley National Park, California. Fragments of bioclastic "trilobite- trash" bed typical of the lower part of the Carrara Formation. The trilobites are olenellids. Circa 1960. Figure 19, U.S. Geological Survey Professional Paper 494-A. #1:/Death Valley National Park/hcb00911 ID. Hunt, C.B. 911 Death Valley National Park, California. Linguloid brachiopods and trilobites from shaly zone near the middle of the Bonanza King Formation in Trail Canyon. Circa 1960. #1:/Death Valley National Park/hcb00912 ID. Hunt, C.B. 912 Death Valley National Park, California. Thin-bedded middle member of the Bonanza King Formation on the north side of Trail Canyon. View is north. This member, about 600 feet thick, forms a distinctive unit separating massive thick-bedded dolomite comprising the upper and lower members of the formation. Circa 1960. Figure 22, U.S. Geological Survey Professional Paper 494-A. #1:/Death Valley National Park/hcb00913 ID. Hunt, C.B. 913 Death Valley National Park, California. Bioclastic bed with fragments of trilobites and brachiopods from shale unit at the base of the Nopah Formation. Circa 1960. Figure 23, U.S. Geological Survey Professional Paper 494-A. #1:/Death Valley National Park/hcb00914 ID. Hunt, C.B. 914 Death Valley National Park, California. Pogonip Group in Trail Canyon. View is north. Photograph is labeled with formation names. On the left is the light and dark-colored dolomite of the Nopah Formation (Cn). Thin-bedded dolomite and shale (Opl and Opm) in the lower and middle part of the Poponip Group form the saddle. Thick-bedded dolomite (Opo) in the upper part of the Pogonip forms the dark ridge dipping under the light-colored Eureka Quartzite (Oe) on the right. The hill on the extreme right is capped with Tertiary lavas (Tv). At the base of the hill is the dark Ely Springs Dolomite (Oes). Circa 1960. Figure 24, U.S. Geological Survey Professional Paper 494-A. #1:/Death Valley National Park/hcb00915 ID. Hunt, C.B. 915 Death Valley National Park, California. Large gastropods (Palliseria sp.) in dolomite in the upper part of the Pogonip Group. Circa 1960. Figure 26, U.S. Geological Survey Professional Paper 494-A. #1:/Death Valley National Park/hcb00916 ID. Hunt, C.B. 916 Death Valley National Park, California. Eureka Quartzite (0e) and overlying Ely Springs Dolomite (Oes) at the mouth of Little Bridge Canyon. The quartzite is much more crushed and granulated than the dolomite and, as a result, has been eroded to form the valley in the foreground. Carbonate formations form the ridges on either side. Circa 1960. Figure 27, U.S. Geological Survey Professional Paper 494-A. #1:/Death Valley National Park/hcb00917 ID. Hunt, C.B. 917 Death Valley National Park, California. Ordovician, Silurian, and Devonian Formations on the south side of Tucki Mountain. At the left is the Nopah Formation (Cn) overlain by Pogonip Group (Op). Eureka Quartzite (Oe) forms the light band under the dark Ely Springs Dolomite (Oes). The gray slope above the Ely Springs Dolomite is Hidden Valley Dolomite (DSh). The striped slope is formed by the Lost Burro Formation (Dl). Photo by J.H. Maxson, circa 1960. Figure 28, U.S. Geological Survey Professional Paper 494-A. #1:/Death Valley National Park/hcb00918 ID. Hunt, C.B. 918 Death Valley National Park, California. Stromatoporoid beds are abundant in the middle of the Lost Burro Formation. Circa 1960. Figure 30 (upper photo), U.S. Geological Survey Professional Paper 494-A. #1:/Death Valley National Park/hcb00919 ID. Hunt, C.B. 919 Death Valley National Park, California. Amphipora(?) beds are abundant in the middle of the Lost Burro Formation. Circa 1960. Figure 30 (lower photo), U.S. Geological Survey Professional Paper 494-A. #1:/Death Valley National Park/hcb00920 ID. Hunt, C.B. 920 Death Valley National Park, California. Limestone containing Cyrtospirifer, which is diagnostic of the uppermost Devonian. A somewhat similar appearing spirifer is present in the lower part of the Tin Mountain Limestone. Circa 1960. Figure 31, U.S. Geological Survey Professional Paper 494-A. #1:/Death Valley National Park/hcb00921 ID. Hunt, C.B. 921 Death Valley National Park, California. Golf ball-like nodules of chert are a characteristic lithologic feature of the Rest Spring Shale and a basal part of the overlying limestone of Pennsylvanian age. Circa 1960. Figure 34, U.S. Geological Survey Professional Paper 494-A. #1:/Death Valley National Park/hcb00922 ID. Hunt, C.B. 922 Death Valley National Park, California. Thin-bedded limestone and dolomite near the base of the unnamed formation of Pennsylvanian age at the east foot of Tucki Mountain. These beds are overturned; their base is to the right. Circa 1960. Figure 36, U.S. Geological Survey Professional Paper 494-A. #1:/Death Valley National Park/hcb00923 ID. Hunt, C.B. 923 Death Valley National Park, California. Fractured cobble conglomerate in the Titus Canyon(?) Formation of Stock and Bode (1935). The fractures extend through the cobbles, and some cross from one cobble to another. They are oriented at right angles to the bedding, which approximately parallels the elongation of the cobbles. Displacements along the fractures are mostly less than a quarter of an inch. Circa 1960. Figure 41, U.S. Geological Survey Professional Paper 494-A. #1:/Death Valley National Park/hcb00924 ID. Hunt, C.B. 924 Death Valley National Park, California. East to the Park Village fault block of the Funeral Formation, showing long narrow terraces that are interpreted to be scars of strand lines of late Pleistocene Lake Manly. No. 3 gravel in the foreground. Circa 1960. Figure 53, U.S. Geological Survey Professional Paper 494-A. #1:/Death Valley National Park/hcb00925 ID. Hunt, C.B. 925 Death Valley National Park, California. West across Death Valley to Trail Canyon fan, showing how the lower limit of the desert varnish follows the contour. The light ground below the darkly varnished gravel is without desert varnish and is highly saliferous. Circa 1960. Figure 57, U.S. Geological Survey Professional Paper 494-A. #1:/Death Valley National Park/hcb00926 ID. Hunt, C.B. 926 Death Valley National Park, California. Shoreline of the Recent lake marked by a change in the ground. Highly saliferous ground, marked by pickleweed mounds in the foreground, forms a salt flat that ends along a contour near the foot of the gravel fans and around the base of the little hill in the center of the cove. View is northwest across the cove north of the West Side Borax Camp. Circa 1960. Figure 58, U.S. Geological Survey Professional Paper 494-A. #1:/Death Valley National Park/hcb00927 ID. Hunt, C.B. 927 Death Valley National Park, California. Narrow terrace around the foot of the Artists Drive fault block, 260 feet below sea level, which is interpreted to be the shoreline of a Recent lake. The ground below the terrace is roughened by the heaving of rock salt. The ground above the terrace is smooth and impregnated with gypsum. View is northwest, half a mile north of the highway across the Devils Golf Course. Circa 1960. Figure 60, U.S. Geological Survey Professional Paper 494-A. #1:/Death Valley National Park/hcb00928 ID. Hunt, C.B. 928 Death Valley National Park, California. Shoreline at the foot of the fan north of Coffin Canyon. The greater salt content of the ground below the shoreline helps retain moisture and appears dark. Circa 1960. Figure 61, U.S. Geological Survey Professional Paper 494-A. #1:/Death Valley National Park/hcb00929 ID. Hunt, C.B. 929 Death Valley National Park, California. Salt Creek Hills, an anticline of Pliocene and Pleistocene(?) beds dividing the saltpan (foreground) from the basin at Mesquite Flat (distance). View is northwest. Light-colored beds in the center of the anticline are Furnace Creek Formation. Dark gravel on the south flank of the anticline and gray gravels on the north flank are early Pleistocene and are uplifted less than the Furnace Creek Formation. Upper Pleistocene gravel forms terraces along the stream breaching the anticline from the southwest and is arched less than the lower Pleistocene gravel. Photo by J.H. Maxson, circa 1960. Figure 75, U.S. Geological Survey Professional Paper 494-A. #1:/Death Valley National Park/hcb00930 ID. Hunt, C.B. 930 Death Valley National Park, California. Hanging valleys at the front of the Black Mountains near the north end of the mountains at Desolation Canyon. Old valleys with U-shaped cross sections have been uplifted about 100 feet along this part of the mountain front. The new valleys are narrow gorges incised into the bottom of the older, more open valleys. The bedrock consists of interbedded volcanic and sedimentary rocks of Miocene or Pliocene age. Circa 1960. Figure 77, U.S. Geological Survey Professional Paper 494-A. #1:/Death Valley National Park/hcb00931 ID. Hunt, C.B. 931 Death Valley National Park, California. Hanging valley at Gower Gulch at the front of the Black Mountains. The floor of the old valley has been raised 50 to 75 feet above the apex of the fan. Furnace Creek Formation (extreme left) overlies the Artist Drive Formation. Circa 1960. Figure 78, U.S. Geological Survey Professional Paper 494-A. #1:/Death Valley National Park/hcb00932 ID. Hunt, C.B. 932 Death Valley National Park, California. Dike swarm in the Amargosa thrust Complex at the mouth of Death Valley Canyon. The host rock is a granitic intrusion. Circa 1960. Figure 97, U.S. Geological Survey Professional Paper 494-A. #1:/Death Valley National Park/hcb00933 ID. Hunt, C.B. 933 Death Valley National Park, California. Chaos-like formation in the Amargosa thrust complex on the north side of Death Valley Canyon. The formation consists mostly of volcanic rocks (light-colored) having interlayered slabs of Paleozoic dolomite (dark rock in the center and foreground). Circa 1960. Figure 98, U.S. Geological Survey Professional Paper 494-A. #1:/Death Valley National Park/hcb00934 ID. Hunt, C.B. 934 Death Valley National Park, California. Augen gneiss in the Amargosa thrust complex north of Hanaupah Canyon at the east foot of the Panamint Range. Circa 1960. Figure 99, U.S. Geological Survey Professional Paper 494-A. #1:/Death Valley National Park/hcb00935 ID. Hunt, C.B. 935 Death Valley National Park, California. Granitized metasediment (light rock) and incompletely replaced metasediment (dark rock above the hammer) in the Amargosa thrust complex about midway between Hanaupah and Death Valley Canyons. On the left is a felsite dike. A layer of green argillite containing lenses of mica cuts through the dark rock above the hammer and extends upward to the right as veins of greenish mineral in the porphyry. Circa 1960. Figure 102, U.S. Geological Survey Professional Paper 494-A. #1:/Death Valley National Park/hcb00936 ID. Hunt, C.B. 936 Death Valley National Park, California. Felsite plug (dark conical hill) in granite in the Amargosa thrust complex on the north side of Death Valley Canyon. The plug is associated with a swarm of dikes trending across the direction of view. Circa 1960. Figure 105, U.S. Geological Survey Professional Paper 494-A. #1:/Death Valley National Park/hcb00937 ID. Hunt, C.B. 937 Death Valley National Park, California. Horizontal fracture cleavage in east- dipping shale member of the Stirling Quartzite between Hanaupah and Starvation Canyons. View is south. The cleavage approximately parallels the faults of the Amargosa thrust system; the beds are not overturned. Circa 1960. Figure 112, U.S. Geological Survey Professional Paper 494-A. #1:/Death Valley National Park/hcb00938 ID. Hunt, C.B. 938 Death Valley National Park, California. Burro Trail fault on the south side of Trail Canyon. Nopah Formation in the upper plate lies almost horizontally on the almost horizontal thrust fault. The lower plate is Bonanza King Formation. Circa 1960. Figure 116, U.S. Geological Survey Professional Paper 494-A. #1:/Death Valley National Park/hcb00939 ID. Hunt, C.B. 939 Death Valley National Park, California. North across tear fault in Starvation Canyon. Stirling Quartzite (pCs); Wood Canyon Formation (Cw);Tertiary volcanic rocks faulted into the Wood Canyon (T). This tear fault marks the southern end of the Burro Trail fault. Circa 1960. Figure 117, U.S. Geological Survey Professional Paper 494-A. #1:/Death Valley National Park/hcb00940 ID. Hunt, C.B. 940 Death Valley National Park, California. Tubular orifices in the fine sediments at Salt Springs near the north side of Borax Camp allow discharge of water to the valley floor. Light areas are accumulations of salts from previous discharges. Circa 1960. Figure 10, U.S. Geological Survey Professional Paper 494-B. #1:/Death Valley National Park/hcb00941 ID. Hunt, C.B. 941 Death Valley National Park, California. Badwater. The pool in which the springs discharge overflows during the winter months through the channels (white) that lead toward the saltpan. Circa 1960. Figure 11, U.S. Geological Survey Professional Paper 494-B. #1:/Death Valley National Park/hcb00947 ID. Hunt, C.B. 947 Death Valley National Park, California. Despite the aridity, there is not much dune sand on the fans around the salt pan, because most of the ground is cemented with salt. At this hill, opposite the entrance to Artist Drive, sand has drifted northward. View is south. Circa 1960. #1:/Death Valley National Park/hcb00948 ID. Hunt, C.B. 948 Death Valley National Park, California. Beach bar built by a Death Valley lake; the bar is about 150 feet above sea level and 400 feet above the valley floor. This bar is crossed by the road to Beatty 2 miles north of Beatty Junction. Funeral Mountains in background. Circa 1960. #1:/Death Valley National Park/hcb00949 ID. Hunt, C.B. 949 Death Valley National Park, California. Shoreline of Death Valley lake, 200 feet above sea level and 450 feet above the floor of the valley, forms a horizontal terrace across the hill in the center. This locality is on the ridge of faulted gravels 1 mile north of the Park Service residential area. Circa 1960. #1:/Death Valley National Park/hcb00951 ID. Hunt, C.B. 951 Death Valley National Park, California. Amargosa River at Coyote Hole near the south end of the salt pan. View is northwest and downstream. At the time of the 1969 floods, this channel, 120 feet wide and 3 feet deep, was filled almost to overflowing. Channel slope is 12 feet per mile, and the peak discharge must have been on the order of 750 cubic feet per second or 1,500 acre feet per day. Downstream where the river turns right, the channel is in an arroyo about 10 feet deep. This arroyo may be due to arching of the salt pan by uplift at Mormon Point. Circa 1960. #1:/Death Valley National Park/hcb00952 ID. Hunt, C.B. 952 Death Valley National Park, California. West distributary of Salt Creek where it crosses the smooth silty rock to the flood plain in Cottonball Basin. This channel is 32 feet wide and 1 foot deep. Much of the efflorescence on the channel upstream from the pool is mirabilite, the hydrous sodium sulfate. Circa 1960. #1:/Death Valley National Park/hcb00953 ID. Hunt, C.B. 953 Death Valley National Park, California. Travertine mound (white) at Nevares Spring, issuing along a fault at the foot of the Funeral Mountains. Cambrian Bonanza King Formation in the background. Circa 1960. #1:/Death Valley National Park/hcb00954 ID. Hunt, C.B. 954 Death Valley National Park, California. Travertine deposits at dry springs along the Furnace Creek fault zone. Two levels of the travertine can be seen. The lower one (tl) drapes over the side of Furnace Creek Wash (foreground) and reaches the floor of the valley. The upper travertine (tu) forms the bench at the skyline in the center. Pre-pottery type projectile points were found on the travertine. Circa 1960. Figure 56, U.S. Geological Survey Professional Paper 494-A. Sketch of portion of photo. #1:/Death Valley National Park/hcb00955 ID. Hunt, C.B. 955 Death Valley National Park, California. Springs (marked by vegetation) issuing from the base of the Pleistocene gravels where they overlie impermeable Pliocene playa beds (white) at the fault blocks back of the Park Service service area. No. 2 gravel in the foreground. Circa 1960. #1:/Death Valley National Park/hcb00956 ID. Hunt, C.B. 956 Death Valley National Park, California. One of the springs along the fault zone at the foot of the Black Mountains. These are mostly sulfate springs; this one is estimated to discharge 3 to 5 gallons per minute. Circa 1960. #1:/Death Valley National Park/hcb00957 ID. Hunt, C.B. 957 Death Valley National Park, California. One of the many pools at Cottonball Marsh. This one, 12 to 18 inches deep, is somewhat saltier than sea water (total salts about 4 percent). Small minnow-like fish (Cyprinodonts) live here. The chemistry of this water is like that of the ground water under Mesquite Flat, and the pools evidently are maintained by discharge of ground water along faults intersecting the high water table ponded by the uplift at the Salt Creek Hills. Circa 1960. #1:/Death Valley National Park/hcb00958 ID. Hunt, C.B. 958 Death Valley National Park, California. Stands of mesquite around the Death Valley salt pan are dying back. The deterioration of the mesquite appears to be general, in part perhaps because of cutting but probably mostly because the water table has been dropping and the ground water is becoming increasingly saline. View is along Salt Creek east of the Salt Creek Hills. #1:/Death Valley National Park/hcb00959 ID. Hunt, C.B. 959 Death Valley National Park, California. Concentric rings of the Death Valley salt pan. View is northwest from Dantes View. Badwater is in the lower left corner. Gypsum in the sulfate zone forms the crescentic deposit in the lower left center. Rock salt of the chloride zone extends over several square miles in the left center. Shoreline features of the Holocene lake that deposited the salts are plainly seen cutting across the toes of the fans on the far side of the valley. Photo by H.E. Malde, circa 1960. #1:/Death Valley National Park/hcb00960 ID. Hunt, C.B. 960 Death Valley National Park, California. Massive rock salt in the central part of the chloride zone is clean salt without much admixed silt. The salt, 2 to 6 feet thick, is polygonally fractured; one of the fractures can be seen in the right center extending left from under the handle of the hammer. The surface is irregular with salt hummocks projecting a foot upward, and these are further roughened by lacy but tough and spiny growths, sharp enough to cut leather. Openings that extend to the wet mud underlying the salt are marked by efflorescences that form delicate structures of different shapes. The one seen here (opposite the tip of the hammer) is a cylindrical growth with a hemispherical top. Circa 1960. #1:/Death Valley National Park/hcb00961 ID. Hunt, C.B. 961 Death Valley National Park, California. The Devils Golf Course, crossed by the road to the west side of Death Valley, is composed of rough silty rock salt. The silt-free, massive rock salt (photo hcb00960) in the central part of the chloride zone was probably deposited in standing water as the Holocene lake gradually dried. The silty rock salt forms a peripheral zone that was probably a mud flat much of the time, and the mud became incorporated in the salts as they crystallized. Circa 1960. #1:/Death Valley National Park/hcb00963 ID. Hunt, C.B. 963 Death Valley National Park, California. Layering near the surface of the massive gypsum shown on the wall of a pit dug 1 foot into the deposit. Capping the surface is an inch of silt, probably mostly deposited by wind and containing a large variety of minerals. Below this is a firm white layer of anhydrous calcium sulfate (anhydrite or bassanite) 4 to 6 inches thick, and below this is the hydrous calcium sulfate (gypsum) in a bread-crumb-like form. Circa 1960. #1:/Death Valley National Park/hcb00964 ID. Hunt, C.B. 964 Death Valley National Park, California. Lumpy mammillary growths of gypsum on a spring-fed marsh. The lumpy forms grow to 8 to 10 inches in diameter. The interiors are composed of damp granular gypsum; the walls or crusts are cemented with sodium chloride. In wet seasons, the chloride may be largely flushed out of the marsh and transported in solution to the central part of the valley. In dry seasons, the chloride becomes deposited on the gypsum. Good examples may be seen in the marshes just north of Badwater. Photo by J.R. Stacy, circa 1960. #1:/Death Valley National Park/hcb00967 ID. Hunt, C.B. 967 Death Valley National Park, California. Channel of the Amargosa River where it enters the salt pan. View is south and upstream to Shoreline Butte. At the time of the 1969 floods, this channel overflowed and the water spread between the mounds of sand on the flood plain. Photo by J.R. Stacy, circa 1960. #1:/Death Valley National Park/hcb00969 ID. Hunt, C.B. 969 Death Valley National Park, California. Wedges of salt, deposited in the polygonal crack, grow upward and probably downward, as the crack is widened by growth of the salt wedge. The wedges are salt ridges which enclose miniature mud flats that trap the silt and brine. These become crusted with salt when the brine evaporates. The originally flat salt crust may, thus, grow upward and become a thick slab of salt segmented with vertical, polygonal columns. Circa 1960. #1:/Death Valley National Park/hcb00970 ID. Hunt, C.B. 970 Death Valley National Park, California. Salt saucers, climax of the salt wedges and polygonally cracked salt crusts. The secondary cracks have so widened, the crusts have been thrust outward. These were old enough when photographed to have collected some silt (dark surface in lower left), and the bottom of each saucer is pierced by one or more drain holes. These saucers, one mile west of Badwater, were destroyed by solution when flooded in 1969. Figure 57, U.S. Geological Survey Professional Paper 494-B. Drawing of photo. #1:/Death Valley National Park/hcb00971 ID. Hunt, C.B. 971 Death Valley National Park, California. Parts of the flood plain that are perennially damp, or even wet, develop a hummocky blister-like growth of silty salt. A recent flood that spread onto this ground deposited new salt (white) in the depressions, but there was not enough water to destroy the blister-like hummocks. Circa 1960. #1:/Death Valley National Park/hcb00972 ID. Hunt, C.B. 972 Death Valley National Park, California, circular pattern due to collapse of salty mud into a pool of salty water. These structures are common to the flood plain in the vicinity of the salt pools. Photo by J.R. Stacy, circa 1960. Figure 37, U.S. Geological Survey Professional Paper 494-B. Drawing of photo. #1:/Death Valley National Park/hcb00973 ID. Hunt, C.B. 973 Death Valley National Park, California. Twigs, stones and other objects resting on the damp mud of the valley floor were lifted upward by salts crystallizing under them. Circa 1960. #1:/Death Valley National Park/hcb00974 ID. Hunt, C.B. 974 Death Valley National Park, California. Wood post shattered by salt, an example of evaporation effects on the salt pan. This wood post, 3.5 feet long, was set in the flood plain of Salt Creek about 1910; ground level was at the lower edge of the bulge. Water rising in the wood evaporated at ground level and burst the wood with precipitated salts. Drawn by J.R. Stacy from photo, circa 1960. Figure 15, U.S. Geological Survey Professional Paper 494-B. #1:/Death Valley National Park/hcb00975 ID. Hunt, C.B. 975 Death Valley National Park, California. Ground patterns on massive gypsum. The surface layer of silt and granular gypsum, about 1 inch thick, develops desiccation cracks that end downward at a firm layer of bassanite. As the silt layer continues to dry, it becomes loose fluff and the cracks are lost. The firm layer of bassanite is divided into irregular polygons by cracks that extend upward into the silt layer and that end downward at the crumbly gypsum, below the bassanite. Circa 1960. #1:/Death Valley National Park/hcb00978 ID. Hunt, C.B. 978 Death Valley National Park, California. Dowels set on terracettes showed virtually no movement in several years. The terracettes seem to be stable in the present climate. They probably formed at a time when the climate was wetter, as it must have been at the time of the Holocene lake on the floor of Death Valley. Circa 1960. #1:/Death Valley National Park/hcb00979 ID. Hunt, C.B. 979 Death Valley National Park, California. Most fans show several shades of staining by iron and manganese oxides (desert varnish). The most stable and older surfaces are stained darkly, the least stable and youngest surfaces are without staining. Circa 1960 #1:/Death Valley National Park/hcb00980 ID. Hunt, C.B. 980 Death Valley National Park, California. Boulder of granite rock (quartz monzonite) in the process of breaking up by exfoliation (peeling of the rock surface like shells of an onion). The exfoliation is probably due to hydration that causes some of the minerals to swell. The exfoliated shells are breaking down further into the coarse grit. Photo by J.R. Stacy, circa 1960. Figure 49, U.S. Geological Survey Professional Paper 494-A. Sketch of portion of photo. #1:/Death Valley National Park/hcb00981 ID. Hunt, C.B. 981 Death Valley National Park, California. Contrast between No. 3 (right) and No. 4(left) gravels. No. 3 gravels are stained with desert varnish; No. 4 gravels, being subject to washing at the present time, are not. No. 3 gravels are firmly embedded in the ground; No. 4 gravels are loose. The No. 3 gravel here is without vegetation because, being more compact than the No. 4, less water infiltrates the ground. Photo by J.R. Stacy, circa 1960. Figure 62, U.S. Geological Survey Professional Paper 494-A. #1:/Death Valley National Park/hcb00983 ID. Hunt, C.B. 983 Death Valley National Park, California. Terraces, eroded on the playa beds of the Furnace Creek Formation and mantled by fan gravels, have been uplifted 75 feet by movement on the fault (buried under the gravel) along the front of the Black Mountains, just south of the mouth of Furnace Creek Wash. View is southeast. Circa 1960. Figure 47, U.S. Geological Survey Professional Paper 494-A. Sketch of photo. #1:/Death Valley National Park/hcb00984 ID. Hunt, C.B. 984 Death Valley National Park, California. Desert pavement on surface of old gravel (No. 2 gravel). The pavement is composed of closely spaced angular stones that are fragments of the large rounded ones that originally comprised the gravel deposit. Photo by J.R. Stacy, circa 1960. Figure 49, U.S. Geological Survey Professional Paper 494-A. Sketch of photo. #1:/Death Valley National Park/hcb00985 ID. Hunt, C.B. 985 Death Valley National Park, California. The silt layer under desert pavement on the fans in Death Valley may contain 0.5 to 4.0 percent (by volume) of water soluble salts. The silt underlying the stones is very porous (vesicular) and cracked polygonally, apparently because there is enough wetting by dew and rain to cause the silt to swell when wet and later shrink again when dry. Circa 1960. #1:/Death Valley National Park/hcb00986 ID. Hunt, C.B. 986 Death Valley National Park, California. Weathering of desert pavement progresses from below as well as from above. The bottom of this pebble of limestone has been etched, evidently by an acid solution. Circa 1960. #1:/Death Valley National Park/hcb00987 ID. Hunt, C.B. 987 Death Valley National Park, California. Boulders smoothed and faceted by wind abrasion (sand blasting) at the toe of the fan on the north side of the Artist Drive exit. . Wind direction is towards the upper right about parallel to the handle of the hammer. The rock is a lava, and the openings (vesicles) are due to bubbles of steam in the lava when it was still molten. The rocks have been smoothed and faceted by sandblast and the vesicles elongated by the abrading sand. Circa 1960. #1:/Death Valley National Park/hcb00988 ID. Hunt, C.B. 988 Death Valley National Park, California. Cracked surface of a mudflow on the fan at Artists Drive. The cracked silt rests on fine gravel. In the foreground, the silt is 7 inches thick, and the cracks are 18 to 24 inches apart. In the background, the silt is 22 inches thick, and the cracks are about 6 inches apart. The cracks tend to form at right angles and form squares rather than meeting at 120 degrees and forming hexagons. Circa 1960. #1:/Death Valley National Park/hcb00989 ID. Hunt, C.B. 989 Death Valley National Park, California. One of the major floods off the east side of the Panamint Range is recorded by a considerable collection of juniper and pine logs at the foot of the Trail Canyon fan. Some of the logs are 6 feet long and 12 feet in diameter; they must have been transported to the toe of the fan from the very head of the canyon. Such an unusual flood may have been caused by an accumulation of snow followed by sudden thaw and warm rain. Circa 1960. #1:/Death Valley National Park/hcb00990 ID. Hunt, C.B. 990 Death Valley National Park, California. Platy Precambrian schist in the south fork of Galena Canyon. Plates are about vertical and trend northwest. Circa 1960. #1:/Death Valley National Park/hcb00991 ID. Hunt, C.B. 991 Death Valley National Park, California. Small minnow-like fish live in Cottonball Marsh. They can move from one pool to another by wiggling through wet mud on low divides. The three seen here (marked by pencils) may have over- extended themselves trying to be amphibious. Circa 1960. #1:/Death Valley National Park/hcb00993 ID. Hunt, C.B. 993 Death Valley National Park, California. Bonanza King Formation, in the upper part of Echo Canyon, is mostly dark-colored, massive, cavernous dolomite. Circa 1960. #1:/Death Valley National Park/hcb00994 ID. Hunt, C.B. 994 Death Valley National Park, California. Ovaloid brachiopods may be found in light tan, shaly and sandy beds that occur near the middle of the Bonanza King Formation. With the brachiopods are fragments of trilobites. Circa 1960. #1:/Death Valley National Park/hcb00995 ID. Hunt, C.B. 995 Death Valley National Park, California. Uppermost of the Cambrian formation is the Nopah Formation which consists chiefly of dolomite banded dark and light, as seen in this view in Trail Canyon. The dolomite contains chert nodules; it is not fossiliferous. Shaly beds at the base of the formation contain fragments of trilobites and brachiopods. Circa 1960. #1:/Death Valley National Park/hcb00997 ID. Hunt, C.B. 997 Death Valley National Park, California. Volcanic rocks and sediments derived from them form the front of the Black Mountains at Artist Drive. Photo by J.R. Stacy, circa 1960. #1:/Death Valley National Park/hcb00999 ID. Hunt, C.B. 999 Death Valley National Park, California. Across the marsh at Badwater. On the left side of the fan can be seen the escarpments of the last 10 to 20 feet of faulting along the front of the Black Mountains. Photo by J.R. Stacy, circa 1960. #1:/Death Valley National Park/hcb01000 ID. Hunt, C.B. 1000 Death Valley National Park, California. The last big earthquake in Death Valley accompanied the faulting that produced this escarpment near the road just south of the Furnace Creek fan. The fault movement occurred about 2,000 years ago, and since that time the fault escarpment has been buried where it crossed the mouths of the canyons issuing from the Tertiary formations at the north end of the Black Mountains. Photo by J.R. Stacy, circa 1960. Figure 72, U.S. Geological Survey Professional Paper 494-A. Sketch of photo. #1:/Death Valley National Park/hcb01008 ID. Hunt, C.B. 1008 Death Valley National Park, California. "Bloom" of cottonballs (ulexite) on the floodplain in Cottonball Basin. The earliest mining for borax involved collecting the cottonballs in baskets. Photo by J.R. Stacy, circa 1960. #1:/Death Valley National Park/hcb01009 ID. Hunt, C.B. 1009 Death Valley National Park, California. Some of the adits on Mont Blanc at the head of 20 Mule Team Canyon. Although the first production of borax in Death Valley was from the salt pan, prospecting in nearby hills led to the discovery of vein deposits of colemanite and other borate minerals. These deposits are richer than those on the floor of the valley, and the center of production gradually shifted to the hills. Photo by J.R. Stacy, circa 1960. #1:/Death Valley National Park/hcb01010 ID. Hunt, C.B. 1010 Death Valley National Park, California. Parts of the floodplain that are frequently flooded are bare mud flats. The mounds are part of the work that was done for patenting the ground in the period 1900 to 1910. The mounds originally were small heaps of mud, but the rise of capillary moisture into them has deposited sodium chloride. View is southeast in Cottonball Basin. Photo by J.R. Stacy, circa 1960. #1:/Death Valley National Park/hcb01011 ID. Hunt, C.B. 1011 Death Valley National Park, California. Atlatl or spear points from the earliest Death Valley sites. These are known as Lake Mohave type points, except the center one in the top row, which is Silver Lake type. Average weight is 8 grams. Arrow points, which were not used until thousands of years later, are mostly less than a quarter of the weight of these projectile points. The rounded ends of some points suggest they may have been used as knives. Scale in centimeters. Circa 1960. #1:/Death Valley National Park/hcb01013 ID. Hunt, C.B. 1013 Death Valley National Park, California. Early Death Valley round and semicircular scrapers. Scale in centimeters. Circa 1960. #1:/Death Valley National Park/hcb01014 ID. Hunt, C.B. 1014 Death Valley National Park, California. Knives from the Death Valley I site. Many of these tools are made of distinctive brown chert. Scale in centimeters. Circa 1960. #1:/Death Valley National Park/hcb01016 ID. Hunt, C.B. 1016 Death Valley National Park, California. Projective points from the Death Valley II site recovered from a boulder-filled pit at a now-dry spring along Furnace Creek Wash. Note the white coating of calcium carbonate on the specimens second from left in the top row and second from right in the bottom row. In wet environments, such coatings form quickly, but in dry gravel, like at the mound, they form slowly. Scale in centimeters. Circa 1960. #1:/Death Valley National Park/hcb01017 ID. Hunt, C.B. 1017 Death Valley National Park, California. Six knives recovered from the boulder- filled pit at the Death Valley III site in Furnace Creek Wash. Scale in centimeters. Circa 1960. #1:/Death Valley National Park/hcb01018 ID. Hunt, C.B. 1018 Death Valley National Park, California. Projectile points and shell beads from the Death Valley III site. Photo by J.R. Stacy, circa 1960. #1:/Death Valley National Park/hcb01019 ID. Hunt, C.B. 1019 Death Valley National Park, California. Death Valley III house site in a fork of Hanaupah Canyon. Two fire pits (hollows) were uncovered together with projectile points and pendants. Alice P. Hunt, who made the archeological survey, is seated; assisting were Thomas W. Robinson of the U.S. Geological Survey and Charles B. Hunt (behind the camera). Circa 1960. #1:/Death Valley National Park/hcb01020 ID. Hunt, C.B. 1020 Death Valley National Park, California. Burial mounds are numerous on the gravel fans near the Death Valley III and Death Valley IV sites. This was identified as a Death Valley IV mound; the Death Valley III ones are similar. Circa 1960. #1:/Death Valley National Park/hcb01021 ID. Hunt, C.B. 1021 Death Valley National Park, California. The near end of this alignment, which covers half an acre, resembles the head and coils of a serpent. At the far end is an oval mound of rock. Circa 1960. #1:/Death Valley National Park/hcb01022 ID. Hunt, C.B. 1022 Death Valley National Park, California. Pottery from the Death Valley IV site, known as Death Valley brown ware. It was made locally and tempered with schist from the Precambrian Johnnie Formation. Circa 1960. #1:/Death Valley National Park/hcb01024 ID. Hunt, C.B. 1024 Death Valley National Park, California. Pendants and pipe from the Death Valley III and IV sites. The pipe (upper left) is made of pottery and probably imported. The circular pendant is talc. The other pendants are schist, probably from the Johnnie Formation. The one at the right, with figures of a brave and a maiden and trails crossing on the reverse side, has been referred to as "Death Valley's first love letter." The talc pendant is 6 centimeters in diameter. Circa 1960. #1:/Death Valley National Park/hcb01025 ID. Hunt, C.B. 1025 Death Valley National Park, California. Pendants of bone or shell (upper left) and shell beads (large white) are found at both Death Valley III and IV sites. Glass beads (mostly dark; two small white ones in lower right) are found at historic sites. The shell beads average about half a centimeter in diameter. Photo by J.R. Stacy, circa 1960. #1:/Death Valley National Park/hcb01026 ID. Hunt, C.B. 1026 Death Valley National Park, California. Figurines of unbaked clay from dunes in the mesquite grove on Furnace Creek fan. Scale in inches. Circa 1960. #1:/Death Valley National Park/hcb01027 ID. Hunt, C.B. 1027 Death Valley National Park, California. Double basin metate, about 20 inches long, from the dunes 1 mile northwest of Bennetts Well. Circa 1960. #1:/Death Valley National Park/hcb01028 ID. Hunt, C.B. 1028 Death Valley National Park, California. Mortar and pestle from the Death Valley IV site, about 50 centimeters high. The mortar is hollowed mesquite wood. Scale in centimeters. Circa 1960. #1:/Death Valley National Park/hcb01029 ID. Hunt, C.B. 1029 Death Valley National Park, California. Excavated mesquite pit at rock circle at BM-229. The pit is about 3 feet deep and about 5 feet in diameter. It had been lined with sacaton grass, part of which is exposed in place. The gravel wall of the pit is exposed on the left. Mesquite beans were stored in the grass, and the mat was then covered with stones and earth. Excavated by Alice P. Hunt and Buddy Welles. Circa 1960. #1:/Death Valley National Park/hcb01030 ID. Hunt, C.B. 1030 Death Valley National Park, California. Petroglyph on boulder at the foot of Hanaupah escarpment west of Tule Spring. Circa 1960. #1:/Death Valley National Park/hcb01031 ID. Hunt, C.B. 1031 Death Valley National Park, California. Old trail across gravel. View is along the trail south from Furnace Creek fan where the trail crosses the ridge south of Mushroom Rock. Circa 1960. Figure 53, U.S. Geological Survey Professional Paper 494-A. #1:/Death Valley National Park/hcb01032 ID. Hunt, C.B. 1032 Death Valley National Park, California. Twenty-mule team tracks across the rough, silty rock salt. This is the original road across Death Valley. It was found by following the old trails and identified by the litter discarded along it. Circa 1960. Figure 31, U.S. Geological Survey Professional Paper 494-B. Drawing of photo. #1:/Death Valley National Park/hcb01033 ID. Hunt, C.B. 1033 Death Valley National Park, California. Three pine trees growing on the Panamint Range are distributed altitudinally. On the highest point of the range, at Telescope Peak, is bristlecone pine, also known as foxtail pine (Pinus aristata), characterized by needles in bundles of five and cones with a long bristle-like prickle (right). Also on the summit, but at somewhat lower altitudes, is the limber pine (Pinus flexilis), also characterized by needles in bundles of five but distributed differently on the branchlets, and the cones are without prickles (center). At still lower altitudes, down to about 5,500 feet, is the pinyon pine (Pinus monophylla), characterized by single needles and by small cones yielding edible seeds that were much prized by the native Americans (left). Circa 1960. #1:/Stacy J.R. Collection-Death Valley National Park/hcb01034 ID. Hunt, C.B. 1034 Desert holly (Atriplex hymenelytra),the most drought resistant shrub in Death Valley. The ash of the leaves contains 30 to 35 percent of sodium chloride. Death Valley National Park. Inyo County, California. ca. 1960. (Photo by J. R. Stacy) #1:/Death Valley National Park/hcb01035 ID. Hunt, C.B. 1035 Death Valley National Park, California. Desert holly, half a mile northwest of the Park's service area, forms nearly pure stands along the lower edges of the gravel fans where they border the salt pan. Photo by J.R. Stacy, circa 1960. Figure 9, U.S. Geological Survey Professional Paper 509. Sketch of photo. #1:/Death Valley National Park/hcb01037 ID. Hunt, C.B. 1037 Death Valley National Park, California. Cattle spinach (Atriplex polycarpa). Photo by J.R. Stacy, circa 1960. #1:/Death Valley National Park/hcb01038 ID. Hunt, C.B. 1038 Death Valley National Park, California. Zoning of xerophytic plants on the lower part of the fan at Johnson Canyon. Foreground is cattle spinach; beyond are dark shrubs, creosote bush. Farther up the fan, the gravels are darkly stained with desert varnish. The surface there has desert pavement which favors runoff and minimizes infiltration, and the ground is bare. The gravels here and farther south in Death Valley are mostly derived from Precambrian formations, and the ground is sandier than it is farther north in the valley. Cattle spinach grows on the toes of the sandy fans; desert holly grows on the toes of the less sandy ones. Photo by J.R. Stacy, circa 1960. #1:/Death Valley National Park/hcb01039 ID. Hunt, C.B. 1039 Death Valley National Park, California. Creosote bush (Larrea tridentata), the shrub characteristic of the Lower Sonoran Life Zone. Photo by J.R. Stacy, circa 1960. #1:/Death Valley National Park/hcb01040 ID. Hunt, C.B. 1040 Death Valley National Park, California. Typical stand of creosote bush. At this stand, on the gravel fan just west of Shorty's Well, there are about 150 shrubs per acre, but the individuals are small and appear to be struggling. A very few desert holly shrubs grow with the creosote bush. Photo by J.R. Stacy, circa 1960. Figure 15, U.S. Geological Survey Professional Paper 509. Sketch of photo. #1:/Death Valley National Park/hcb01041 ID. Hunt, C.B. 1041 Death Valley National Park, California. Burroweed (Franseria dumosa). Circa 1960. #1:/Death Valley National Park/hcb01042 ID. Hunt, C.B. 1042 Death Valley National Park, California. Typical stand of burroweed near the road along Furnace Creek Wash, above Corkscrew Canyon. This shrub grows on the high parts of the gravel fans above the main stands of creosote bush. Burroweed grows in washes between bare surfaces on the fans with desert pavement. Commonly, desert holly grows along the sides of the washes, and burroweed on the bottom. Photo by J.R. Stacy, circa 1960. Figure 18, U.S. Geological Survey Professional Paper 509. Sketch of photo. #1:/Death Valley National Park/hcb01043 ID. Hunt, C.B. 1043 Death Valley National Park, California. Saltgrass (Distichlis stricta) is common around the edge of the salt pan where the water in the ground contains no more than 3 percent salts. Photo by J.R. Stacy, circa 1960. Figure 19, U.S. Geological Survey Professional Paper 494-B. Sketch of photo. #1:/Death Valley National Park/hcb01044 ID. Hunt, C.B. 1044 Death Valley National Park, California. Stand of arrowweed by Highway 190 at the Devils Cornfield. Photo by J.R. Stacy, circa 1960. #1:/Death Valley National Park/hcb01046 ID. Hunt, C.B. 1046 Death Valley National Park, California. East at Tule Spring. In the foreground is pickleweed growing on salt-crusted silt; the content of soil salts is about 15 percent. The shrubs in the middle distance are arrowweed; soil salts there are about 10 percent, and the ground water contains only 0.2 percent salts. Behind the arrowweed is mesquite on ground containing less than 1 percent salts. The gravel fans beyond the mesquite have a mixed growth of desert holly and creosote bush, about fifty of each per acre. Hanaupah Canyon and Telescope Peak are in the distance. Photo by J.R. Stacy, circa 1960. Figure 27, U.S. Geological Survey Professional Paper 509. Sketch of photo. #1:/Death Valley National Park/hcb01048 ID. Hunt, C.B. 1048 Death Valley National Park, California. This is not very good grazing land, but the burros have thoroughly adapted to it. Circa 1960. #1:/Death Valley National Park/hcb01049 ID. Hunt, C.B. 1049 Death Valley National Park, California. Salt Creek opposite Furnace Creek fan is not dry enough, commonly, to be forded by coyotes and four wheel drive vehicles. It can discharge formidable floods sufficient to erode the channel. Note the coyote tracks preserved beneath the water lower right. Circa 1960. #1:/Death Valley National Park/hcb01050 ID. Hunt, C.B. 1050 Death Valley National Park, California. Kit fox visits camp. Circa 1960. #1:/Death Valley National Park/hcb01051 ID. Hunt, C.B. 1051 Death Valley National Park, California. Kangaroo rat visits camp high on the fan at Hanaupah Canyon. This is the Merriam kangaroo (Dipodomys merriami), the smallest of the kangaroo rats, characterized by having only four toes on each hind foot. This fellow inhabits the gravel fans; another species with four toes inhabits the dunes at the foot of the fans (D. deserti). Higher on the mountains, in the woodland of the pinyon pine, is a five toed species (D. panamintus). Circa 1960. #1:/Death Valley National Park/hcb01052 ID. Hunt, C.B. 1052 Death Valley National Park, California. Furnace Creek Formation at the north end of the Black Mountains. View is southwest and west of Zabriskie Point, an overlook by Highway 190 about 3 miles up Furnace Creek Wash from Furnace Creek Inn. The base of the Furnace Creek Formation is at the topographic break between the badlands and the rougher, higher ground in the distance on the left. Light-colored playa beds about 2,500 feet thick extend to the base of a conglomerate which forms the dark cliff at the right. The beds are dipping to the right (north) into the Texas Spring Syncline. The center of the photograph looks west across Death Valley to the Panamint Range at Aguereberry Point; Tucki Mountain on the right. Photo by J.R. Stacy, circa 1960. Figure 44, U.S. Geological Survey Professional Paper 494-A. Photos hcb01052, hcb01053, hcb01054, and hcb01055 form a panorama. #1:/Death Valley National Park/hcb01053 ID. Hunt, C.B. 1053 Death Valley National Park, California. Furnace Creek Formation at the north end of the Black Mountains. View is southwest and west of Zabriskie Point, an overlook by Highway 190 about 3 miles up Furnace Creek Wash from Furnace Creek Inn. The base of the Furnace Creek Formation is at the topographic break between the badlands and the rougher, higher ground in the distance on the left. Light-colored playa beds about 2,500 feet thick extend to the base of a conglomerate which forms the dark cliff at the right. The beds are dipping to the right (north) into the Texas Spring Syncline. The center of the photograph looks west across Death Valley to the Panamint Range at Aguereberry Point; Tucki Mountain on the right. Photo by J.R. Stacy, circa 1960. Figure 44, U.S. Geological Survey Professional Paper 494-A. Photos hcb01052, hcb01053, hcb01054, and hcb01055 form a panorama. #1:/Death Valley National Park/hcb01054 ID. Hunt, C.B. 1054 Death Valley National Park, California. Furnace Creek Formation at the north end of the Black Mountains. View is southwest and west of Zabriskie Point, an overlook by Highway 190 about 3 miles up Furnace Creek Wash from Furnace Creek Inn. The base of the Furnace Creek Formation is at the topographic break between the badlands and the rougher, higher ground in the distance on the left. Light-colored playa beds about 2,500 feet thick extend to the base of a conglomerate which forms the dark cliff at the right. The beds are dipping to the right (north) into the Texas Spring Syncline. The center of the photograph looks west across Death Valley to the Panamint Range at Aguereberry Point; Tucki Mountain on the right. Photo by J.R. Stacy, circa 1960. Figure 44, U.S. Geological Survey Professional Paper 494-A. Photos hcb01052, hcb01053, hcb01054, and hcb01055 form a panorama. #1:/Death Valley National Park/hcb01055 ID. Hunt, C.B. 1055 Death Valley National Park, California. Furnace Creek Formation at the north end of the Black Mountains. View is southwest and west of Zabriskie Point, an overlook by Highway 190 about 3 miles up Furnace Creek Wash from Furnace Creek Inn. The base of the Furnace Creek Formation is at the topographic break between the badlands and the rougher, higher ground in the distance on the left. Light-colored playa beds about 2,500 feet thick extend to the base of a conglomerate which forms the dark cliff at the right. The beds are dipping to the right (north) into the Texas Spring Syncline. The center of the photograph looks west across Death Valley to the Panamint Range at Aguereberry Point; Tucki Mountain on the right. Photo by J.R. Stacy, circa 1960. Figure 44, U.S. Geological Survey Professional Paper 494-A. Photos hcb01052, hcb01053, hcb01054, and hcb01055 form a panorama. #1:/Hares C.J. Collection/hcj00507 ID. Hares, C.J. 507 Graben formed by dropped block of granite. Vertical joints are well developed. Sec. 33, T. 30 N., R. 85 W. Natrona County, Wyoming.n.d. #1:/Indiana Dunes National Lakeshore/hcl00001 ID. Hill, C.L. 1cp Indiana Dunes National Lakeshore, Indiana. Forest scenes. Page VI (top left), U.S. Geological Survey Circular 1085. #1:/Indiana Dunes National Lakeshore/hcl00002 ID. Hill, C.L. 2cp Indiana Dunes National Lakeshore, Indiana. Park ranger helping children. Page VI (top right), U.S. Geological Survey Circular 1085. #1:/Indiana Dunes National Lakeshore/hcl00003 ID. Hill, C.L. 3cp Indiana Dunes National Lakeshore, Indiana. The forest changes as it approaches the shore line. Portion of page VI (center), U.S. Geological Survey Circular 1085. #1:/Indiana Dunes National Lakeshore/hcl00005 ID. Hill, C.L. 5cp Indiana Dunes National Lakeshore, Indiana. Wind-blown sand encroaching on the forest. Page VI (bottom right), U.S. Geological Survey Circular 1085. #1:/Hill, C.L Collection/hcl00006 ID. Hill, C.L. 6cp Satellite photograph of the earth, Red Sea, Africa, Arabia, Indian and Atlantic Oceans, and wind patterns. Published on page 1 in U.S. Geological Survey. Circular 1085. 1991. Published on frontispiece in U.S. Geological Survey. Professional Paper 560. #1:/Coral/hcl00014 ID. Hill, C.L. 14cp Coral, as an indicator of past environments, is especially useful in determining past sea levels. Some types of corals, such as brain coral, must live close to the surface. As the sea level rises with the melting of the ice sheets, the corals must grow upward to survive. If the age of the corals can be determined, the past rate of sea level rise can be estimated. As the ice sheets melted rapidly during the latest ice age, sea levels rose at a rate of 8 feet in 100 years. Page 6, U.S. Geological Survey Circular 1085. #1:/Indiana Dunes National Lakeshore/hcl00024 ID. Hill, C.L. 24cp Indiana Dunes National Lakeshore, Indiana. This color infrared aerial photograph shows a major part of the lakeshore. Vegetation is shown in red. Page 13 (top), U.S. Geological Survey Circular 1085. #1:/Indiana Dunes National Lakeshore/hcl00027 ID. Hill, C.L. 27cp Indiana Dunes National Lakeshore, Indiana. Fragmentation of park land by urban areas, such this highway, can create islands of natural ecosystems and can disrupt the natural movement of plants and animals. Page 16 (bottom left), U.S. Geological Survey Circular 1085. #1:/Indiana Dunes National Lakeshore/hcl00030 ID. Hill, C.L. 30cp Indiana Dunes National Lakeshore, Indiana. The unique environment of the Indiana Dunes supports a large variety of vegetation, such as the white trillium. Page 18 (left), U.S. Geological Survey Circular 1085. #1:/Indiana Dunes National Lakeshore/hcl00031 ID. Hill, C.L. 31cp Indiana Dunes National Lakeshore, Indiana. The unique environment of the Indiana Dunes supports a large variety of vegetation, such as the prickly pear cactus. Page 18 (right), U.S. Geological Survey Circular 1085. #1:/Indiana Dunes National Lakeshore/hcl00032 ID. Hill, C.L. 32cp Indiana Dunes National Lakeshore, Indiana. The unique environment of the Indiana Dunes supports a large variety of animals, such as Canada geese. Page 19 (top), U.S. Geological Survey Circular 1085. #1:/Indiana Dunes National Lakeshore/hcl00033 ID. Hill, C.L. 33cp Indiana Dunes National Lakeshore, Indiana. The unique environment of the Indiana Dunes supports a large variety of animals, such as turtles. Page 19 (center left), U.S. Geological Survey Circular 1085. #1:/Indiana Dunes National Lakeshore/hcl00034 ID. Hill, C.L. 34cp Indiana Dunes National Lakeshore, Indiana. The unique environment of the Indiana Dunes supports a large variety of animals, such as six-lined racerunners (lizard). Page 19 (center right), U.S. Geological Survey Circular 1085. #1:/Indiana Dunes National Lakeshore/hcl00035 ID. Hill, C.L. 35cp Indiana Dunes National Lakeshore, Indiana. The unique environment of the Indiana Dunes supports a large variety of animals, such as opossums. Page 19 (bottom left), U.S. Geological Survey Circular 1085. #1:/Indiana Dunes National Lakeshore/hcl00036 ID. Hill, C.L. 36cp Indiana Dunes National Lakeshore, Indiana. The unique environment of the Indiana Dunes supports a large variety of animals, such as raccoons. Page 19 (bottom right), U.S. Geological Survey Circular 1085. 1991 #1:/Wetlands/hcl00037 ID. Hill, C.L. 37cp Wetlands are an important nesting site for birds. Circa 1990. Page 22 (top photo), U.S. Geological Survey Circular 1085. #1:/Wetlands/hcl00038 ID. Hill, C.L. 38cp Wetlands include swamps, bogs, marshes, ponds, and peat lands. Circa 1990. Page 22 (bottom left photo), U.S. Geological Survey Circular 1085. #1:/Indiana Dunes National Lakeshore/hcl00039 ID. Hill, C.L. 39cp Indiana Dunes National Lakeshore, Indiana. Wetlands are commonly adjacent to dunes. Page 22 (bottom right), U.S. Geological Survey Circular 1085. #1:/Indiana Dunes National Lakeshore/hcl00044 ID. Hill, C.L. 44cp Indiana Dunes National Lakeshore, Indiana. Storms with high winds and waves create steep narrow beaches, like this one where winter storms are frequent and especially destructive. Page 28 (bottom left), U.S. Geological Survey Circular 1085. #1:/Hayes C.W. Collection/hcw00225 ID. Hayes, C.W. 225 Placer gold diggings. Hahns Peak, Colorado. Routt County, Colorado. 1903. #1:/Hayes C.W. Collection/hcw00231 ID. Hayes, C.W. 231 Gold dredge twelve miles south of Dixon, Wyoming. Moffat County, Colorado. 1903. #1:/Hayes C.W. Collection/hcw00232 ID. Hayes, C.W. 232 Gold dredge at work twelve miles south of Dixon, Wyoming. Moffat County, Colorado. 1903. #1:/Harshman E.N. Collection/hen00007 ID. Harshman, E.N. 7 Ripple-marked mudstone characteristic of the upper part of the middle unit of the Cloverly Formation in the Shirley Basin area, NW1/4 sec. 24, T. 27 N., R.77 W. Albany County, Wyoming. ca. 1964. Figure 10 in U.S. Geological Survey. Professional paper 745. 1972. #1:/Monument Valley Navajo Tribal Park/hen00015 ID. Hinrichs, E.N. 15ct Monument Valley Navajo Tribal Park, Arizona. Rumpled bedding in siltstone of the Moenkopi Formation near Agathla Peak. June 1951. #1:/Canyonlands National Park/hen00025 ID. Hinrichs, E.N. 25ct Canyonlands National Park, Utah. Slump in Pea north of Salt Creek. August 1956. #1:/Capitol Reef National Monument/hen00037 ID. Hinrichs, E.N. 37 Capitol Reef National Monument, Utah. Narrows on Capitol Wash. 1952. #1:/Canyonlands National Park/hen00044 ID. Hinrichs, E.N. 44 Canyonlands National Park, Utah. Paleochannel in the Cutler Formation, west center edge, sec. 32, T. 29-1/2 S., R. 20 E., about 1 mile east of The Loop on the Colorado River. June 28, 1956. #1:/Canyonlands National Park/hen00045 ID. Hinrichs, E.N. 45 Canyonlands National Park, Utah. North neck of The Loop on the Colorado River. June 1957. #1:/Canyonlands National Park/hen00079 ID. Hinrichs, E.N. 79 Canyonlands National Park, Utah. The Needles, viewed from Devil's Lane. June 1956. #1:/Canyonlands National Park/hen00082 ID. Hinrichs, E.N. 82 Canyonlands National Park, Utah. Junction of the Green and Colorado Rivers. June 1956. #1:/Hancock E.T. Collection-Fairfield Mine/het00002 ID. Hancock, E.T. 2 Fairfield Mine showing winze and entrance to the tunnel. Two and a half miles southwest of Meeker. Rio Blanco County, Colorado. 1911. #1:/Hancock E.T. Collection-James Mine/het00024 ID. Hancock, E.T. 24 Entrance to James Mine.T. 3 N., R. 93W. Meeker Quad. Moffat County, Colorado. 1912. #1:/Hancock E.T. Collection-Sulphur Creek Mine/het00036 ID. Hancock, E.T. 36 The Sulphur Creek Mine. Sulphur Creek. Meeker Quad. Rio Blanco County, Colorado. 1911. #1:/Hancock E.T. Collection-Lyon Canyon Coal Mine/het00039 ID. Hancock, E.T. 39 The Lyon Canyon Coal Mine. Lion Canyon. Meeker Quad. Rio Blanco County, Colorado. 1911. #1:/Hancock E.T. Collection-Kimberly Mine/het00098 ID. Hancock, E.T. 98 Kimberly Mine, in Sec. 32, T.7 N., R.90W. Moffat County, Colorado. 1912. #1:/Hancock E.T. Collection-Blevin Mine/het00111 ID. Hancock, E.T. 111 Gives an idea of thickness of the coal bed at the Blevin Mine, in Sec. 28, T. 8N., R.93 W. Moffat County, Colorado. 1912. #1:/Hancock E.T. Collection-Lay Mine/het00112 ID. Hancock, E.T. 112 Opening into the Lay Mine at Lay, Moffat County, Colorado. 1912. #1:/Hancock E.T. Collection/het00113 ID. Hancock, E.T. 113 Gold dredge Jack Rabbit Spring. Moffat County, Colorado. 1912. #1:/Hancock E.T. Collection-Harris Mine/het00215 ID. Hancock, E.T. 215 Harris Mine at Mount Harris. Taken from a point on the hill about one fourth mile north of the mine. The prominent sandstone near the top of the bluff is the twentymile sandstone. Pagoda Quadrangle, Routt County, Colorado. 1912. #1:/Hess F.L. Collection-Wolf Tongue Mining Company/hfl00407 ID. Hess, F.L. 407 The Town Lot shaft house of the Wolf Tongue Mining Company. Nederland, Boulder County, Colorado. September 3, 1909. #1:/Hess F.L. Collection-Wolf Tongue Mining Company/hfl00408 ID. Hess, F.L. 408 The Hoosier shaft house of the Wolf Tongue Mining Company, two miles northwest of Nederland. Boulder County, Colorado. September 3, 1909. #1:/Hess F.L. Collection-Primos Mining Company/hfl00409 ID. Hess, F.L. 409 The Lone Pine shaft house of the Primos Mining Company, 2 1/2 miles northeast of Nederland. Boulder County, Colorado. September 4, 1909 #1:/Hess F.L. Collection-Primos Mining Company/hfl00410 ID. Hess, F.L. 410 Panorama of the Oregon, Conger, and Beddig shaft houses, one mile northwest of Nederland. The Oregon on the left belongs to the Wolf Tongue Mining Company; the Conger in the middle, to the Primos Mining Company, the Beddig to the Colorado Tungsten Corporation. The Conger is the best mine in the district. Boulder County, Colorado. September 7, 1909. #1:/Hess F.L. Collection-Wolf Tongue Mining Company/hfl00501 ID. Hess, F.L. 501 Wolf Tongue Mining & Milling Company's mill and tailings. The framework at the right is where the stamps for milling the Caribou silver ores stood. The bottom of the sands are Caribou tailings and carry silver. Nederland, Boulder County, Colorado. July 24, 1911. #1:/Hess F.L. Collection-Primos Mining Company/hfl00519 ID. Hess, F.L. 519 Adit No, 2 on the Primos Chemical Company's property, east side of Big Bear Creek, 2 1/2 miles south of Newmire. The adit is just under the limestone, which is present above the La Plata sandstone at all vanadiferous localities in this region. San Miguel County, Colorado. August 3, 1911. #1:/Hess F.L. Collection-Primos Mining Company/hfl00522 ID. Hess, F.L. 522 Vanadium ore near roof of Primos Chemical Company's vanadium mine on the east side of Big Bear Creek about 100 feet from the portal. The ore at this point was 35 feet thick. The light streaks in the picture show silicifies sandstone; the darker blotches are vanadiferous sandstone. San Miguel County, Colorado. August 3, 1911. #1:/Hess F.L. Collection-Primos Mining Company/hfl00525 ID. Hess, F.L. 525 Panorama of Primos Chemical Company's workings on the west side of Big Bear Creek, 2 1/2 miles above Newmire. San Miguel County, Colorado. August 4, 1911. #1:/Hess F.L. Collection-Primos Mining Company/hfl00526 ID. Hess, F.L. 526 Panorama of Primos Chemical Company's workings on the west side of Big Bear Creek, 2 1/2 miles above Newmire. San Miguel County, Colorado. August 4, l911. #1:/Hess F.L. Collection-Primos Mining Company/hfl00529 ID. Hess, F.L. 529 Panorama of Primos Chemical Company's workings on the west side of Big Bear Creek, 2 1/2 miles above Newmire. San Miguel County, Colorado. August 4, 1911. #1:/Hess F.L. Collection-Boulder Tungsten Production and Development Company/hfl00669 ID. Hess, F.L. 669 Shafthouse of the Denver-Boulder Tungsten Production and Development Company. Max Boehmer claim, 1 mile northeast of Sunshine, from the northwest. Boulder County, Colorado. February 24, 1917. #1:/Hess F.L. Collection-Wolf Tongue Mining Company/hfl00670 ID. Hess, F.L. 670 Wolf Tongue Mining Company's mill, from the southeast, Nederland, Boulder County, Colorado. February 27, 1917. #1:/Hess F.L. Collection-Wolf Tongue Mining Company-Gale Mine/hfl00671 ID. Hess, F.L. 671 Panorama of the Wolf Tongue Mining Company, the Gale mine, 2 1/2 miles north of Nederland. Boulder County, Colorado. February 27, 1917. #1:/Hess F.L. Collection-Clyde Mine/hfl00672 ID. Hess, F.L. 672 Looking east and southeast, to Clyde mine and surroundings, 2-1/2 miles north of Nederland. Boulder Canyon, Colorado. February 27, 1917. #1:/Hess F.L. Collection-Clyde Mine/hfl00673 ID. Hess, F.L. 673 Form a panorama with photo 674 showing workings on the opposite side of the gulch from the Clyde mine. The Lone Tree mine of the Primos Mining and Milling Company is at the top of the hill in the right center, looking northwest and west. Boulder County, Colorado. February 27, 1917. #1:/Hess F.L. Collection-Primos Mining Company/hfl00674 ID. Hess, F.L. 674 Form a panorama with photo 673. Open cut on the "Copeland property" of the Primos Exploration Company, South Boulder Creek, 1 1/2 miles north of Crescent station on the Moffat Road and 10 miles southwest of Boulder looking north. Boulder County, Colorado. March 6, 1917. #1:/Hess F.L. Collection-Primos Mining Company/hfl00675 ID. Hess, F.L. 675 Ice in mouth of shaft on the Primos Mining and Milling Company's ground, 2 miles northwest of Nederland. Boulder County, Colorado. March 2, 1917. #1:/Hess F.L. Collection-Quaker Mine/hfl00676 ID. Hess, F.L. 676 The "Oregon" ferberite vein on the 300 foot level of the Quaker Mine, 2 miles west of Sugar Loaf, and 4 miles northeast of Lakewood (?). E.O. Dane, manager for scale. Boulder County, Colorado. March 2, 1917. #1:/Hess F.L. Collection-Rare Metal Ores Company/hfl00677 ID. Hess, F.L. 677 The Rare Metal Ores Company, mill, at Rollinsville, from the northeast. Gilpin County, Colorado. March 3, 1917. #1:/Hess F.L. Collection-John Duncan Mill/hfl00681 ID. Hess, F.L. 681 Feberite Tungsten mill, 1/2 mile above Ferberite, Boulder Canyon. Boulder County, Colorado. March 4, 1917. #1:/Hess F.L. Collection-Katie Ferberite Mine-Tungsten Metals Corporation/hfl00682 ID. Hess, F.L. 682 Looking up Millionaire Gulch, south in Section 29, T.1 N.R. 71 W. The Katie Ferberite Mine is on the right. The Dorothy mine of the Tungsten Metals Corporation is at the head of the gulch. Boulder County, Colorado. March 5, 1917. #1:/Hess F.L. Collection-Primos Exploration Company/hfl00683 ID. Hess, F.L. 683 Open cut on the "Copeland property" of the Primos Exploration Company, South Boulder Creek, 1 1/2 miles north of Boulder looking south. Boulder County, Colorado. March 6, 1917. #1:/Hess F.L. Collection-Primos Exploration Company/hfl00684 ID. Hess, F.L. 684 Open cut on the "Copeland property" of the Primos Exploration Company, South Boulder Creek, 1 1/2 miles north of Boulder looking north. Boulder County, Colorado. March 6, 1917. #1:/Hess F.L. Collection-Primos Exploration Company/hfl00685 ID. Hess, F.L. 685 Mill on "Copeland property" of the Primos Exploration Company, South Boulder Creek, 1 1/2 miles north of Crescent station on the Moffat Road and 10 miles southwest of Boulder, looking northeast. Boulder County, Colorado. March 6, 1917. #1:/Hess F.L. Collection-Black Metal Reduction Company Mill-Luckie 2 Tungsten Mill/hfl00695 ID. Hess, F.L. 695 The Luckie 2 Tungsten Mill, near mouth of Boulder Canyon with The Black Metal Reduction Company's mill beyond it. Boulder, Boulder County, Colorado. March 9, 1917. #1:/Hess F.L. Collection-Black Metal Reduction Company Mill/hfl00696 ID. Hess, F.L. 696 Black Metal Reduction Company's Tungsten mill at the mouth of Boulder Canyon. Boulder County, Colorado. March 9, 1917. #1:/Hess F.L. Collection-Portland Gold Mining Company Mill/hfl00701 ID. Hess, F.L. 701 Slimes from the Independence mill and Portland Gold Mining Company's mill in gulch below Battle Mountain in the forth fork of Wilson Creek. Battle Mountain with the Portland Gold Mine is in the extreme background. The new mill of the Portland Gold Mining Co. is shown in the middle just behind the tailings dump. Cripple Creek mining district. Teller County, Colorado. March 21, 1917. #1:/Hess F.L. Collection-Portland Gold Mining Company Mill/hfl00702 ID. Hess, F.L. 702 Nearer view of the Portland Gold Mining Company's new mill at Victor, Colorado. Taken from the tailings dump. Teller County, Colorado. March 21, 1917. #1:/Hess F.L. Collection-Utarado Mining Company/hfl00738 ID. Hess, F.L. 738 Prospect tunnel of the Utarado Mining Company 2 miles northwest of Ouray. Uintah County, Utah. May 22, 1917. #1:/Hess F.L. Collection-Frank Edison Mill/hfl00743 ID. Hess, F.L. 743 Pump and mill of Frank Edison, 15 miles northeast of Lucin, Box Elder County, Utah. May 30, 1917. #1:/Hess F.L. Collection-Lady Belle Mine/hfl00878 ID. Hess, F.L. 878 Upper workings of Lady Belle mine, 7 miles southeast of Eagle. Eagle County, Colorado. October 11,1921. #1:/Hess F.L. Collection/hfl00881 ID. Hess, F.L. 881 Workings on the John Mackey No. 2 claim of J.L. Riland, Uranium Mountain (Cold Creek) 13 miles northeast of Meeker. Rio Blanco County, Colorado. October 15, 1921. #1:/Hess F.L. Collection/hfl00906 ID. Hess, F.L. 906 Ore dumps on the Cripple Creek claim of the U.S. Radium Co., Long Park. Montrose County, Colorado. October 28, 1921. #1:/Mesa Verde National Park/hfl00947 ID. Hess, F.L. 947 Mesa Verde National Park, Colorado. Sun Palace, viewed from Sun Point. November 12, 1921. #1:/Mesa Verde National Park/hfl00948 ID. Hess, F.L. 948 Mesa Verde National Park, Colorado. Cliff Palace. November 12, 1921. #1:/Hess F.L. Collection-Golden Cycle Mine-Vindicator Mine/hfl0698b ID. Hess, F.L. 698b Panorama with photo 698c. Looking north to northwest. Dumps of the Golden Cycle Mine, with Vindicator Mine, beyond them, and adjoining properties on the west. Victor, Colorado. Teller County, Colorado. March 20, 1917. #1:/Hess F.L. Collection-Golden Cycle Mine-Vindicator Mine/hfl0698c ID. Hess, F.L. 698c Panorama with photo 698b. Looking north to northwest. Dumps of the Golden Cycle Mine (right foreground and left). Vindicator Mine and adjoining properties on the west. Victor, Colorado Teller County, Colorado. March 20, 1917. #1:/Hess F.L. Collection-Portland Gold Mining Company Mill/hfl0699a ID. Hess, F.L. 699a Panorama with photo 699c. Looking west from Battle Mountain, Victor. Dump from the Portland Gold Mining Company's mill on the right. Bull Hill in middle foreground. Teller County, Colorado. March 20, 1917. #1:/Hess F.L. Collection-Portland Gold Mining Company Mill/hfl0699c ID. Hess, F.L. 699c Panorama with photo 699a. Looking west from Battle Mountain, Victor. Dump from the Portland Gold Mining Company's mill on the right. Bull Hill in middle foreground. Teller County, Colorado. March 20, 1917. #1:/Hess F.L. Collection-Mojave Boulder Tungsten Mining Company/hfl0700a ID. Hess, F.L. 700a Workings of the Mojave Boulder Tungsten Mining Company on its Good Friday claim in the northeast side of the junction between North Boulder and Middle Boulder Creeks, just below Boulder Falls, 8 miles west of Boulder. Boulder County, Colorado. March 9, 1917. #1:/Hess F.L. Collection-Mojave Boulder Tungsten Mining Company/hfl0700d ID. Hess, F.L. 700d Lowest workings. Workings of the Mojave Boulder Tungsten Mining Company on its Good Friday claim in the northeast side of the junction between North Boulder and Middle Boulder Creeks, just below Boulder Falls, 8 miles west of Boulder, Boulder County, Colorado. March 9, 1917 #1:/Alaska/hgw00009 ID. Holmes, G.W. 9 Alaska. Earthflow on the northwest shore of Lake Schrader in Schrader till. This flow occurred within a three day period in August 1958. Figure 8, U.S. Geological Survey Bulletin 1201-B. #1:/Alaska/hgw00010 ID. Holmes, G.W. 10 Alaska. Moraines of the Katak Glaciation on the west slope of Mount Chamberlin in the Franklin Mountains. These moraines are steep sided and are 100 to 300 feet in height. A fresh moraine lies against the glacier, and two slightly weathered moraines rest a few hundred yards downstream. Circa 1959. #1:/Alaska/hgw00014 ID. Holmes, G.W. 14 Alaska. Pingo on the upper Tanana River in a typical topographic location near the break in slope of a moderately high hill. #1:/Alaska/hgw00015 ID. Holmes, G.W. 15 Alaska. Discovery pingo on the upper Tanana River. A dense stand of large birch trees on the pingo contrasts sharply with the open stand of small black spruce in the surrounding muskeg. August 1960. #1:/Hinrichs E.N. Collection-Oyler Mine/hinr0031 ID. Hinrichs, E.N. 31 J.F.S. and R.Q. Lewis at Oyler mine, Capitol Reef. Notom 1 SW quadrangle. Wayne County, Utah. 1952. #1:/Hinrichs E.N. Collection-Oyler Mine/hinr0032 ID. Hinrichs, E.N. 32 R.Q. Lewis at portal, Oyler mine, Capitol Reef. Notom 1 SW quadrangle. Wayne County, Utah. 1952. #1:/Cape Hatteras National Seashore/hja00041 ID. Holmes, J.A. 41 Cape Hatteras National Seashore, North Carolina. Cape Hatteras Lighthouse and buildings. Pre-1910. #1:/Cape Hatteras National Seashore/hja00042 ID. Holmes, J.A. 42 Cape Hatteras National Seashore, North Carolina. Cape Hatteras Lighthouse and buildings. Pre-910. See also photo hja00046. #1:/Cape Hatteras National Seashore/hja00046 ID. Holmes, J.A. 46 Cape Hatteras National Seashore, North Carolina. Cape Hatteras Lighthouse and buildings, to the right of photo hja00042. Pre-1910. #1:/Hebgen Lake, Montana, Earthquake August 1959/hjb00001 ID. Hadley, J.B. 1ct Hebgen Lake, Montana, Earthquake August 1959. Hebgen fault scarp where it cuts across Cabin Creek. The fault scarp here is 5 feet high. The stream rapidly lowered the scarp and in about two years appeared as a rapids of moderate gradient. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/hjb00002 ID. Hadley, J.B. 2ct Hebgen Lake, Montana, Earthquake August 1959. Disrupted ground and tilted trees of the Kirkwood earthflow. View is northwest. 1959 #1:/Hebgen Lake, Montana, Earthquake August 1959/hjb00006 ID. Hadley, J.B. 6ct Hebgen Lake, Montana, Earthquake August 1959. Kirkwood earthflow. Contact between the earthflow and bedrock shows in the lower right corner. Note the tilted trees and hummocky ground in the center. 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/hjb00007 ID. Hadley, J.B. 7ct Hebgen Lake, Montana, Earthquake August 1959. Disrupted ground and tilted trees of the Kirkwood earth flow. View is northwestward. 1959. #1:/Great Smoky Mountains National Park/hjb00015 ID. Hadley, J.B. 15 Great Smoky Mountains National Park, Tennessee and North Carolina. Block field of Thunderhead Sandstone on the north side of U.S. Highway 441 west of the Loop. Circa 1950. Figure 44, U.S. Geological Survey Professional Paper 349-B. #1:/Great Smoky Mountains National Park/hjb00027 ID. Hadley, J.B. 27 Great Smoky Mountains National Park, Tennessee and North Carolina. Conglomerate in Thunderhead Sandstone. Normal quartz-feldspar conglomerate: prominent white pebbles are microcline;, more abundant quartz is gray. Circa 1950. Figure 19-A, U.S. Geological Survey Professional Paper 349-B. #1:/Great Smoky Mountains National Park/hjb00028 ID. Hadley, J.B. 28 Great Smoky Mountains National Park, Tennessee and North Carolina. Conglomerate in Thunderhead Sandstone. Quartzite-pebble conglomerate; larger pebbles are quartzite and quartz; smaller one are microcline; a few pebbles are granite. Altitude is 3,540 feet on the trail from Porters Flat to Trillium Gap. Circa 1950. Figure 19-B, U.S. Geological Survey Professional Paper 349-B. #1:/Great Smoky Mountains National Park/hjb00029 ID. Hadley, J.B. 29 Great Smoky Mountains National Park, Tennessee and North Carolina. East bank of Big Creek half a mile above the bridge at Mount Sterling. Lenticular bedding in fine-grained ankeritic sandstone and darker argillaceous sandstone. Rich Butt Sandstone. Circa 1950. Figure 20-A, U.S. Geological Survey Professional Paper 349-B. #1:/Great Smoky Mountains National Park/hjb00030 ID. Hadley, J.B. 30 Great Smoky Mountains National Park, Tennessee and North Carolina. Big Creek due south of Cosby Knob. Current bedding and slump structure in fine sandstone (lighter) and argillaceous siltstone (darker) in the upper part of the Thunderhead Sandstone. Current flowed from left to right. Ruler is 6 inches long. Circa 1950. Figure 20-B, U.S. Geological Survey Professional Paper 349-B. #1:/Great Smoky Mountains National Park/hjb00031 ID. Hadley, J.B. 31 Great Smoky Mountains National Park, Tennessee and North Carolina. Upper part of Thunderhead Sandstone, Big Creek three-tenths of a mile beyond the end of the truck trail at Walnut Bottom. Conglomerate, Great Smoky Group. Well- rounded cobbles, mostly leucogranite, with pebbles of calcareous sandstone and quartzite, embedded in coarse carbonatic sandstone. Bedding dips 15 degrees to the right. Circa 1950. Figure 21-A, U.S. Geological Survey Professional Paper 349-B. #1:/Great Smoky Mountains National Park/hjb00032 ID. Hadley, J.B. 32 Great Smoky Mountains National Park, Tennessee and North Carolina. Boulevard Trail on the east side of Myrtle Point, Mount LeConte. Pisolites, Great Smoky Group. Flattened siliceous pisolites in sandy dolomite, Anakeesta Formation. Circa 1950. Figure 21-B, U.S. Geological Survey Professional Paper 349-B. #1:/Great Smoky Mountains National Park/hjb00033 ID. Hadley, J.B. 33 Great Smoky Mountains National Park, Tennessee and North Carolina. Styx Branch, south slope of Mount LeConte, 500 feet northwest of the junction with Alum Cove Creek. Dark slate, Anakeesta Formation. Bedding and slaty cleavage in dark chloritoidal slate. View is east-northeast at beds dipping 25 degrees southeast. Circa 1950. Figure 22-A, U.S. Geological Survey Professional Paper 349-B. #1:/Great Smoky Mountains National Park/hjb00034 ID. Hadley, J.B. 34 Great Smoky Mountains National Park, Tennessee and North Carolina. Alum Cave Creek about two-tenths of a mile below Styx Branch on the south side of Mount LeConte. Intraformational breccia, Anakeesta Formation. Intraformational fragments of argillaceous beds in coarse feldspathic sandstone. Dark layers of sandy argillite at the top. Circa 1950. Figure 22-B, U.S. Geological Survey Professional Paper 349-B. #1:/Great Smoky Mountains National Park/hjb00051 ID. Hadley, J.B. 51 Great Smoky Mountains National Park, Tennessee and North Carolina. Surface features of alluvial deposits. Alluvial fan at Cherokee Orchard, 3 miles southwest of Gatlinburg. View is west-southwest from the east side of the fan, where it is about 1 mile wide. Lower slopes of Bull Head are on the left. On the left skyline is Sugarland Mountain beyond the West Prong Little Pigeon River. Circa 1950. Figure 45-A, U.S. Geological Survey Professional Paper 349-B. #1:/Hebgen Lake, Montana, Earthquake August 1959/hjb00058 ID. Hadley, J.B. 58 Hebgen Lake, Montana, Earthquake August 1959. Scarp area at the head of the Kirkwood earthflow, showing maximum distension of the surface, toppled trees, soil destroyed, and much subsoil. View is east from the east edge of the flow. #1:/Hebgen Lake, Montana, Earthquake August 1959/hjb0012c ID. Hadley, J.B. 12ct Hebgen Lake, Montana, Earthquake August 1959. Disrupted ground, tilt trees and pressure ridge formed near the margins of the Kirkwood earthflow. 1959. #1:/Great Smoky Mountains National Park/hjb00141 ID. Hadley, J.B. 141 Great Smoky Mountains National Park, Tennessee and North Carolina. Cleavage and bedding in the Anakeesta Formation on the cliff tops of Mount LeConte. April 1953. #1:/Great Smoky Mountains National Park/hjb00146 ID. Hadley, J.B. 146 Great Smoky Mountains National Park, Tennessee and North Carolina. Middle Prong Little Pigeon River above Emerts Cove. Ledges of Roaring Fork Sandstone with bedding dipping gently upstream (south). Circa 1948. #1:/Hebgen Lake, Montana, Earthquake August 1959/hjb0016c ID. Hadley, J.B. 16ct Hebgen Lake, Montana, Earthquake August 1959. Detritus, tilted trees, and the hummocky ground mark the center of the Kirkwood earth flow. View is southwestward. 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/hjb0024c ID. Hadley, J.B. 24ct Hebgen Lake, Montana, Earthquake August 1959. Fault scarp and moat at Cabin Creek. 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/hjb0028c ID. Hadley, J.B. 28ct Hebgen Lake, Montana, Earthquake August 1959. Fault scarp at Cabin Creek. 1959. #1:/Hunter J.F. Collection-Good Hope Mine/hjf00119 ID. Hunter, J.F. 119 The Good Hope mine buildings with part of the dump, from south side. Gunnison, Colorado. October 3, 1912. #1:/Hunter J.F. Collection-Aberdeen Granite Quarry/hjf00122 ID. Hunter, J.F. 122 Aberdeen granite quarry South Beaver Creek. Gunnison County, Colorado. October 8, 1912. #1:/Walnut Canyon National Monument/hjh00040 ID. Hance, J.H. 40 Walnut Canyon National Monument, Arizona. Cliff dwellings. #1:/Walnut Canyon National Monument/hjh00042 ID. Hance, J.H. 42 Walnut Canyon National Monument, Arizona. Cliff dwellings. #1:/Walnut Canyon National Monument/hjh00043 ID. Hance, J.H. 43 Walnut Canyon National Monument, Arizona. Distant view of the cliff dwellings shown in photographs hjh00040 and hjh00042. #1:/Walnut Canyon National Monument/hjh00044 ID. Hance, J.H. 44 Walnut Canyon National Monument, Arizona. Cliff dwellings. #1:/Charleston, South Carolina, Earthquake August 31, 1886/hjk00001 ID. Hillers, J.K. 1 Charleston, South Carolina, Earthquake August 31, 1886. Torsional displacement of a chimney on the west side of Church Street, between Queen and Broad, looking southwest. #1:/Charleston, South Carolina, Earthquake August 31, 1886/hjk00002 ID. Hillers, J.K. 2 Charleston, South Carolina, Earthquake August 31, 1886. Damage to St. Philip's Church. Photo by C.C. Jones. Plate 16, U.S. Geological Survey Annual Report 9 (1887-88). #1:/Charleston, South Carolina, Earthquake August 31, 1886/hjk00003 ID. Hillers, J.K. 3 Charleston, South Carolina, Earthquake August 31, 1886. Brick house at 157 Tradd Street. #1:/Charleston, South Carolina, Earthquake August 31, 1886/hjk00004 ID. Hillers, J.K. 4 Charleston, South Carolina, Earthquake August 31, 1886. Wooden house in Lincolnville which was thrown by the earthquake. #1:/Charleston, South Carolina, Earthquake August 31, 1886/hjk00005 ID. Hillers, J.K. 5 Charleston, South Carolina, Earthquake August 31, 1886. Gable of a brick House at the corner of Queen and Mazyck Streets. #1:/Charleston, South Carolina, Earthquake August 31, 1886/hjk00006 ID. Hillers, J.K. 6 Charleston, South Carolina, Earthquake August 31, 1886. Thrown gable and twisted chimney at the residence of Bishop Lynchat on Broad Street opposite Orange, looking northeast. #1:/Charleston, South Carolina, Earthquake August 31, 1886/hjk00007 ID. Hillers, J.K. 7 Charleston, South Carolina, Earthquake August 31, 1886. Damaged foundations of wooden houses. #1:/Charleston, South Carolina, Earthquake August 31, 1886/hjk00008 ID. Hillers, J.K. 8 Charleston, South Carolina, Earthquake August 31, 1886. Displaced portico of the synagogue on Hazel Street. #1:/Charleston, South Carolina, Earthquake August 31, 1886/hjk00009 ID. Hillers, J.K. 9 Charleston, South Carolina, Earthquake August 31, 1886. Derailed locomotive on Ten Mile Hill. September 1886. Plate 19, U.S. Geological Survey Annual Report 9 (1887-1888). #1:/Hillers J.K. Collection/hjk0000a ID. Hillers, J.K. a A view of Zuni. n.d. #1:/Hillers J.K. Collection/hjk0000b ID. Hillers, J.K. b Susquehanna bridge, B & O Railroad. n.d. #1:/Hillers J.K. Collection/hjk0000c ID. Hillers, J.K. c Zuni. n.d. #1:/Hillers J.K. Collection/hjk0000d ID. Hillers, J.K. d Zuni from housetops, looking east. n.d. #1:/Yosemite National Park/hjk0000e ID. Hillers, J.K. e Yosemite National Park, California. Yosemite Valley. 1892. #1:/Hillers J.K. Collection/hjk0000f ID. Hillers, J.K. f Chihuahua Cathedral. Chihuahua, Province of Chihuahua, Mexico.n.d. #1:/Charleston, South Carolina, Earthquake August 31, 1886/hjk00010 ID. Hillers, J.K. 10 Charleston, South Carolina, Earthquake August 31, 1886. Large craterlet on Ten Mile Hill. Photo by C.C. Jones, September 1886. Plate 20, U.S. Geological Survey Annual Report 9 (1887-1888) #1:/Charleston, South Carolina, Earthquake August 31, 1886/hjk00011 ID. Hillers, J.K. 11 Charleston, South Carolina, Earthquake August 31, 1886. Craterlet on Ten Mile Hill. #1:/Charleston, South Carolina, Earthquake August 31, 1886/hjk00012 ID. Hillers, J.K. 12 Charleston, South Carolina, Earthquake August 31, 1886. Sinkhole under a house on Ten Mile Hill. #1:/Charleston, South Carolina, Earthquake August 31, 1886/hjk00013 ID. Hillers, J.K. 13 Charleston, South Carolina, Earthquake August 31, 1886. Fissure and a wrecked brick house on Tradd Street. #1:/Charleston, South Carolina, Earthquake August 31, 1886/hjk00014 ID. Hillers, J.K. 14 Charleston, South Carolina, Earthquake August 31, 1886. Craterlet on Ten Mile Hill. #1:/Charleston, South Carolina, Earthquake August 31, 1886/hjk00015 ID. Hillers, J.K. 15 Charleston, South Carolina, Earthquake August 31, 1886. Broken cornice on St. Michael's Church and view down Meeting Street. Photo by C.C. Jones, September 1886. Plate 14, U.S. Geological Survey Annual Report 9 (1887-1888). #1:/Charleston, South Carolina, Earthquake August 31, 1886/hjk00016 ID. Hillers, J.K. 16 Charleston, South Carolina, Earthquake August 31, 1886. The worst earthquake wreck in Charleston. #1:/Charleston, South Carolina, Earthquake August 31, 1886/hjk00017 ID. Hillers, J.K. 17 Charleston, South Carolina, Earthquake August 31, 1886. Damaged chimneys at the southwest corner of Beaufin and Archdale Streets. #1:/Charleston, South Carolina, Earthquake August 31, 1886/hjk00018 ID. Hillers, J.K. 18 Charleston, South Carolina, Earthquake August 31, 1886. Displaced towers and coping of the city hospital on the southwest corner of Luzon and Magazine Streets. #1:/Charleston, South Carolina, Earthquake August 31, 1886/hjk00019 ID. Hillers, J.K. 19 Charleston, South Carolina, Earthquake August 31, 1886. Damaged tower and coping of the city hospital on the southwest corner of Luzon and Magazine Streets. Photo by C.C. Jones, September 1886. Plate 18, U.S. Geological Survey Annual Report 9 (1887-1888). #1:/Charleston, South Carolina, Earthquake August 31, 1886/hjk00020 ID. Hillers, J.K. 20 Charleston, South Carolina, Earthquake August 31, 1886. Brick wall of the city Jail on Magazine Street near Luzon, fissured by earthquake. #1:/Charleston, South Carolina, Earthquake August 31, 1886/hjk00021 ID. Hillers, J.K. 21 Charleston, South Carolina, Earthquake August 31, 1886. Displaced monument in the cemetery of the First Presbyterian Church on the southwest corner of Meeting and Tradd Streets. #1:/Charleston, South Carolina, Earthquake August 31, 1886/hjk00022 ID. Hillers, J.K. 22 Charleston, South Carolina, Earthquake August 31, 1886. Displaced monument in the cemetery of the Unitarian Church. #1:/Charleston, South Carolina, Earthquake August 31, 1886/hjk00023 ID. Hillers, J.K. 23 Charleston, South Carolina, Earthquake August 31, 1886. Broken monument in the cemetery of St. John's Lutheran Church. #1:/Charleston, South Carolina, Earthquake August 31, 1886/hjk00024 ID. Hillers, J.K. 24 Charleston, South Carolina, Earthquake August 31, 1886. Displaced monument in the cemetery and damaged roof of St. John's Lutheran Church. #1:/Charleston, South Carolina, Earthquake August 31, 1886/hjk00025 ID. Hillers, J.K. 25 Charleston, South Carolina, Earthquake August 31, 1886. Displaced monument in the cemetery of St. John's Lutheran Church. #1:/Charleston, South Carolina, Earthquake August 31, 1886/hjk00026 ID. Hillers, J.K. 26 Charleston, South Carolina, Earthquake August 31, 1886. Fallen monument in the cemetery of St. John's Lutheran Church. #1:/Charleston, South Carolina, Earthquake August 31, 1886/hjk00027 ID. Hillers, J.K. 27 Charleston, South Carolina, Earthquake August 31, 1886. People encamped in the city park public square after the earthquake. Plate 7, U.S. Geological Survey Annual Report 9 (1887-1888). #1:/Yosemite National Park/hjk00028 ID. Hillers, J.K. 28 Yosemite National Park, California. Cathedral Spires in Yosemite Valley. #1:/Yosemite National Park/hjk00029 ID. Hillers, J.K. 29 Yosemite National Park, California. Washington Column and Royal Arches and forest across the river. 1892. #1:/Yosemite National Park/hjk00030 ID. Hillers, J.K. 30 Yosemite National Park, California. Washington Column and Royal Arches, bridge across the river, and North Dome. 1892. #1:/Yosemite National Park/hjk00032 ID. Hillers, J.K. 32 Yosemite National Park, California. Site of Yosemite Falls, taken during the dry season. 1892. #1:/Yosemite National Park/hjk00033 ID. Hillers, J.K. 33 Yosemite National Park, California. Three Brothers and the forest at their feet. 1892. #1:/Yosemite National Park/hjk00034 ID. Hillers, J.K. 34 Yosemite National Park, California. Up Yosemite Valley with El Capitan on the left and the Three Brothers on the right. 1892. #1:/Yosemite National Park/hjk00035 ID. Hillers, J.K. 35 Yosemite National Park, California. El Capitan, viewed from the east. The 3,000-foot cliff is the highest in Yosemite Valley and one of the highest in the world. The salient is composed throughout of unfractured, massive granite. The gray blotches on the wall at the right are due to masses of diorite that invaded the granite. A pine tree about 100-feet high stands in a niche with an overhanging roof a short distance above the bushy slope at the base. 1892. Plate 17, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/hjk00036 ID. Hillers, J.K. 36 Yosemite National Park, California. Shingle bank deposit by the steam in Yosemite Valley. 1892. #1:/Yosemite National Park/hjk00038 ID. Hillers, J.K. 38 Yosemite National Park, California. El Capitan, viewed from the northwest. Pond in the foreground. 1892. #1:/Yosemite National Park/hjk00039 ID. Hillers, J.K. 39 Yosemite National Park, California. Washington Column and Royal Arches and their reflections in the Merced River. 1892. #1:/Yosemite National Park/hjk00040 ID. Hillers, J.K. 40 Yosemite National Park, California. El Capitan, with pond in the foreground. 1892. #1:/Hillers J.K. Collection-Yosemite National Park/hjk00041 ID. Hillers, J.K. 41 Distant view of site of Yosemite Falls, taken during the dry season. Yosemite National Park. California. 1892. #1:/Yosemite National Park/hjk00042 ID. Hillers, J.K. 42 Yosemite National Park, California. Profile of El Capitan, viewed from the trail. 1892. #1:/Yosemite National Park/hjk00043 ID. Hillers, J.K. 43 Yosemite National Park, California. Big trees in Mariposa Grove. 1892. #1:/Kings Canyon National Park/hjk00044 ID. Hillers, J.K. 44 Kings Canyon National Park, California. Kings River Canyon, showing a granite dome in the distance. 1892. #1:/Kings Canyon National Park/hjk00045 ID. Hillers, J.K. 45 Kings Canyon National Park, California. The Sentinel in Kings River Canyon. 1892. #1:/Kings Canyon National Park/hjk00046 ID. Hillers, J.K. 46 Kings Canyon National Park, California. Kings River at the foot of The Sentinel. 1892. #1:/Kings Canyon National Park/hjk00047 ID. Hillers, J.K. 47 Kings Canyon National Park, California. Kings River at the foot of The Sentinel. 1892. #1:/Kings Canyon National Park/hjk00048 ID. Hillers, J.K. 48 Kings Canyon National Park, California. Granite dome in Kings River Canyon. 1892. #1:/Kings Canyon National Park/hjk00049 ID. Hillers, J.K. 49 Kings Canyon National Park, California. The jungle in Kings River Canyon. 1892. #1:/Kings Canyon National Park/hjk00050 ID. Hillers, J.K. 50 Kings Canyon National Park, California. Granite cliffs in Kings River Canyon. 1892. See also photo hjk00051. #1:/Kings Canyon National Park/hjk00051 ID. Hillers, J.K. 51 Kings Canyon National Park, California. Granite cliffs in Kings River Canyon. 1892. Reduction of photo hjk00050. #1:/Hillers J.K. Collection/hjk00052 ID. Hillers, J.K. 52 Sharp peak at head of Big Pine Creek. Inyo County, California. 1892. #1:/Yosemite National Park/hjk00053 ID. Hillers, J.K. 53 Yosemite National Park, California. Yosemite Valley in the snow. Photo by Fiske. #1:/Niagara Falls/hjk00054 ID. Hillers, J.K. 54 Niagara Falls, New York and Canada. American portion, viewed from the Canadian side. 1886. #1:/Niagara Falls/hjk00055 ID. Hillers, J.K. 55 Niagara Falls, New York and Canada. Rapids above the American Falls, viewed from Goat Island. 1886. #1:/Niagara Falls/hjk00056 ID. Hillers, J.K. 56 Niagara Falls, New York and Canada. Part of Horseshoe Falls, viewed from the Canadian side. 1886. #1:/Niagara Falls/hjk00057 ID. Hillers, J.K. 57 Niagara Falls, New York and Canada. Above Niagara Falls, viewed from the Canadian side. 1886. #1:/Niagara Falls/hjk00058 ID. Hillers, J.K. 58 Niagara Falls, New York and Canada. Rapids above Niagara Falls, viewed from Goat Island. 1886. #1:/Niagara Falls/hjk00059 ID. Hillers, J.K. 59 Niagara Falls, New York and Canada. American Falls, viewed from Goat Island. 1886. #1:/Grand Canyon National Park/hjk00061 ID. Hillers, J.K. 61 Grand Canyon National Park, Arizona. Grand Canyon, viewed from Lava Pinnacle, looking downstream. The mouth of Prospect Canyon is on the left with a small cinder cone on the point beyond. Lava Falls Rapid is just below the mouth of Prospect Canyon. #1:/Grand Canyon National Park/hjk00062 ID. Hillers, J.K. 62 Grand Canyon National Park, Arizona. Grand Canyon, viewed from the north rim, looking downstream. The mouth of Prospect Canyon is in the foreground, and a cinder cone is at the extreme left. Lava Falls Rapid is just visible below Prospect Canyon. #1:/Grand Canyon National Park/hjk00063 ID. Hillers, J.K. 63 Grand Canyon National Park, Arizona. North across the Grand Canyon from a point on the east side of the Three Castles. Below is the canyon of Hance Creek; in the background, the Walhalla Plateau and its outlier, Wotan's Throne. The dark mass rising on the right is a shoulder of Coronado Butte. #1:/Zion National Park/hjk00064 ID. Hillers, J.K. 64 Zion National Park, Utah. The Three Patriarchs on the west side of Zion Canyon.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). #1:/Grand Canyon National Park/hjk00066 ID. Hillers, J.K. 66 Grand Canyon National Park, Arizona. Grand Canyon of the Colorado River at the foot of the Toroweap. #1:/Grand Canyon National Park/hjk00068 ID. Hillers, J.K. 68 Grand Canyon National Park, Arizona. Looking into Marble Canyon of the Colorado River. Shinumo Altar in the distance. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00069 ID. Hillers, J.K. 69 Heart of the Canyon of Lodore, Green River. Dinosaur National Monument. Moffat County, Colorado.n.d. #1:/Hillers J.K. Collection/hjk00070 ID. Hillers, J.K. 70 Canyon at the mouth of Yampa River. Moffat County, Colorado. June 29, 1871. #1:/Grand Canyon National Park/hjk00072 ID. Hillers, J.K. 72 Grand Canyon National Park, Arizona. Kaibab Plateau. View is north to Vermilion Cliffs. #1:/Zion National Park/hjk00073 ID. Hillers, J.K. 73 Zion National Park, Utah. Tower reflected in the Virgin River.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). #1:/Zion National Park/hjk00075 ID. Hillers, J.K. 75 Zion National Park, Utah. The Watchman, as seen from the Virgin River.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Negative cracked. #1:/Zion National Park/hjk00076 ID. Hillers, J.K. 76 Zion National Park, Utah. Castle Domes. Peaks from Sun Mountain to East Temple.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). #1:/Zion National Park/hjk00077 ID. Hillers, J.K. 77 Zion National Park, Utah. Canyon wall of the Virgin River.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). #1:/Zion National Park/hjk00078 ID. Hillers, J.K. 78 Zion National Park, Utah. The Dome on the Virgin River.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). #1:/Grand Canyon National Park/hjk00079 ID. Hillers, J.K. 79 Grand Canyon National Park, Arizona. Eroded sandstone in Kanab Canyon. #1:/Zion National Park/hjk00080 ID. Hillers, J.K. 80 Zion National Park, Utah. West Temple as seen across North Fork.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). #1:/Hillers J.K. Collection/hjk00081 ID. Hillers, J.K. 81 Eagle Crag, Virgin River. Utah.n.d. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00082 ID. Hillers, J.K. 82 Echo Park, looking down from upper end. Yampa River in the foreground, coming from left. Green River enters from right. Dinosaur National Monument. Moffat County, Colorado.n.d. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00083 ID. Hillers, J.K. 83 Green River, Gate of Lodore, just within the entrance.J.C. Pilling in photograph. Dinosaur National Monument. Moffat County, Colorado.n.d. #1:/Hillers J.K. Collection/hjk00084 ID. Hillers, J.K. 84 El Tintero, near Chaves. New Mexico.n.d. #1:/Canyon de Chelly National Monument/hjk00085 ID. Hillers, J.K. 85 Canyon de Chelly National Monument, Arizona. Downstream from forks of Canyon de Chelly. #1:/Canyon de Chelly National Monument/hjk00086 ID. Hillers, J.K. 86 Canyon de Chelly National Monument, Arizona. Rock monument in Canyon de Chelly. #1:/Canyon de Chelly National Monument/hjk00087 ID. Hillers, J.K. 87 Canyon de Chelly National Monument, Arizona. Vertical walls 1,000 feet high. #1:/Canyon de Chelly National Monument/hjk00090 ID. Hillers, J.K. 90 Canyon de Chelly National Monument, Arizona. Rock monument in Canyon de Chelly. #1:/Canyon de Chelly National Monument/hjk00091 ID. Hillers, J.K. 91 Canyon de Chelly National Monument, Arizona. Captains of the Canyon. #1:/Canyon de Chelly National Monument/hjk00092 ID. Hillers, J.K. 92 Canyon de Chelly National Monument, Arizona. In Canyon de Chelly. #1:/Canyon de Chelly National Monument/hjk00093 ID. Hillers, J.K. 93 Canyon de Chelly National Monument, Arizona. Hand Rock. #1:/Canyon de Chelly National Monument/hjk00094 ID. Hillers, J.K. 94 Canyon de Chelly National Monument, Arizona. Vertical walls of Canyon de Chelly, looking east. #1:/Canyon de Chelly National Monument/hjk00095 ID. Hillers, J.K. 95 Canyon de Chelly National Monument, Arizona. Gateway in Canyon de Chelly. #1:/Hillers J.K. Collection/hjk00096 ID. Hillers, J.K. 96 Navajo Church, near Fort Wingate. McKinley County, New Mexico. 1882. #1:/Hillers J.K. Collection/hjk00097 ID. Hillers, J.K. 97 Pyramid Butte, Navajo Church, in north end of Zuni Uplift. McKinley County, New Mexico. 1882. #1:/Hillers J.K. Collection/hjk00098 ID. Hillers, J.K. 98 North end of Zuni Uplift, from west of Fort Wingate. McKinley County, New Mexico. ca. 1882. #1:/Hillers J.K. Collection/hjk00099 ID. Hillers, J.K. 99 Northwest end of Zuni Uplift from west of Fort Wingate. McKinley County, New Mexico. ca. 1882. #1:/Hillers J.K. Collection/hjk00100 ID. Hillers, J.K. 100 Steep-dipping bed at northwestern end of Zuni Uplift from west of Fort Wingate. McKinley County, New Mexico. ca. 1882. #1:/Hillers J.K. Collection/hjk00101 ID. Hillers, J.K. 101 Looking north along the Cretaceous hogback of the north end of the Zuni Uplift west of Fort Wingate. McKinley County, New Mexico. ca. 1882. Published as plate 3 in U.S. Geological Survey. Bulletin 767. 1925. #1:/Walnut Canyon National Monument/hjk00102 ID. Hillers, J.K. 102 Walnut Canyon National Monument, Arizona. Cliff dwellings under Aubrey Limestone. 1885. #1:/Walnut Canyon National Monument/hjk00103 ID. Hillers, J.K. 103 Walnut Canyon National Monument, Arizona. Cliff dwellings under Aubrey Limestone and cross-bedded sandstone. 1885. #1:/Hillers J.K. Collection/hjk00104 ID. Hillers, J.K. 104 Survey camp at base of San Francisco Mountain. Coconino County, Arizona. 1885. #1:/Hillers J.K. Collection/hjk00105 ID. Hillers, J.K. 105 Cinder cones near San Francisco Mountain. Coconino County, Arizona. 1885. #1:/Hillers J.K. Collection/hjk00106 ID. Hillers, J.K. 106 Distant view of San Francisco Mountain. Coconino County, Arizona. 1885. #1:/Hillers J.K. Collection/hjk00107 ID. Hillers, J.K. 107 Johnson Canyon, Santa Fe Railroad. East of Ash Fork. Coconino County, Arizona. 1885. #1:/Hillers J.K. Collection/hjk00108 ID. Hillers, J.K. 108 A distant view of Chihuahua. Province of Chihuahua, Mexico.n.d. #1:/Hillers J.K. Collection/hjk00109 ID. Hillers, J.K. 109 Santa Fe Railroad bridge and train, over Canyon Diablo. Coconino County, Arizona. 1885. #1:/Hillers J.K. Collection/hjk00110 ID. Hillers, J.K. 110 Santa Fe Railroad bridge over Canyon Diablo. Coconino County, Arizona. 1885. #1:/Hillers J.K. Collection/hjk00111 ID. Hillers, J.K. 111 Shinarump Cliff, Escalante River. Utah.n.d. #1:/Hillers J.K. Collection/hjk00112 ID. Hillers, J.K. 112 Fort Wingate. McKinley County, New Mexico. 1882. #1:/Hillers J.K. Collection/hjk00113 ID. Hillers, J.K. 113 Fort Wingate. McKinley County, New Mexico. 1882. #1:/Hillers J.K. Collection/hjk00114 ID. Hillers, J.K. 114 Head of Silver Creek. Marion County(?) Florida. ca. 1894. #1:/Hillers J.K. Collection/hjk00115 ID. Hillers, J.K. 115 Silver Springs, east of Ocala. Marion County, Florida. ca. 1894. #1:/Hillers J.K. Collection/hjk00116 ID. Hillers, J.K. 116 On Silver Creek. Marion County(?) Florida. ca. 1894. #1:/Hillers J.K. Collection/hjk00117 ID. Hillers, J.K. 117 Silver Springs, east of Ocala. Marion County, Florida. ca. 1894. #1:/Hillers J.K. Collection/hjk00118 ID. Hillers, J.K. 118 Silver Springs, east of Ocala. Looking upstream. Marion County, Florida. ca. 1894. #1:/Hillers J.K. Collection/hjk00119 ID. Hillers, J.K. 119 Osceola Spring, Silver Springs. Marion County, Florida. ca. 1894. #1:/Charleston, South Carolina, Earthquake August 31, 1886/hjk0011a ID. Hillers, J.K. 11a Charleston, South Carolina, Earthquake August 31, 1886. Craterlet and curled mud flakes on Ten Mile Hill. Photo by C.C. Jones, September 1886. Plate 21, U.S. Geological Survey Annual Report 9 (1887-1888). #1:/Hillers J.K. Collection/hjk00120 ID. Hillers, J.K. 120 Orange trees at Ocala. Marion County, Florida. ca. 1894. #1:/Hillers J.K. Collection/hjk00121 ID. Hillers, J.K. 121 Century plant at Ocala. Marion County, Florida. ca. 1894. #1:/Hillers J.K. Collection/hjk00122 ID. Hillers, J.K. 122 Grove of live oak trees near Ocala. Marion County, Florida. ca. 1894. #1:/Yellowstone National Park/hjk00123 ID. Hillers, J.K. 123 Yellowstone National Park, Wyoming. Siliceous deposits in the Mammoth Hot Springs area. See also photo hjk00124. #1:/Yellowstone National Park/hjk00124 ID. Hillers, J.K. 124 Yellowstone National Park, Wyoming. Siliceous deposits in the Mammoth Hot Springs area. See also photo hjk00123. #1:/Yellowstone National Park/hjk00125 ID. Hillers, J.K. 125 Yellowstone National Park, Wyoming. Angel Terrace in the Mammoth Hot Springs area. #1:/Yellowstone National Park/hjk00126 ID. Hillers, J.K. 126 Yellowstone National Park, Wyoming. Pulpit Terrace in the Mammoth Hot Springs area. #1:/Yellowstone National Park/hjk00127 ID. Hillers, J.K. 127 Yellowstone National Park, Wyoming. Minerva Terrace in the Mammoth Hot Springs area. #1:/Yellowstone National Park/hjk00128 ID. Hillers, J.K. 128 Yellowstone National Park, Wyoming. Minerva Terrace in the Mammoth Hot Springs area. #1:/Yellowstone National Park/hjk00129 ID. Hillers, J.K. 129 Yellowstone National Park, Wyoming. Terrace of Excelsior Geyser in Midway Geyser Basin, viewed from the opposite bank of the Firehole River. #1:/Yellowstone National Park/hjk00130 ID. Hillers, J.K. 130 Yellowstone National Park, Wyoming. Growler Geyser in Norris Geyser Basin in eruption. #1:/Yellowstone National Park/hjk00131 ID. Hillers, J.K. 131 Yellowstone National Park, Wyoming. Paint Pots near Fountain Geyser in Lower Geyser Basin. #1:/Yellowstone National Park/hjk00132 ID. Hillers, J.K. 132 Yellowstone National Park, Wyoming. Fountain Geyser Basin, part of Lower Geyser Basin. #1:/Yellowstone National Park/hjk00133 ID. Hillers, J.K. 133 Yellowstone National Park, Wyoming. Comet Geyser in Upper Geyser Basin in eruption. #1:/Yellowstone National Park/hjk00134 ID. Hillers, J.K. 134 Yellowstone National Park, Wyoming. Beehive group of geysers in Upper Geyser Basin, viewed from the opposite side of Firehole River. #1:/Yellowstone National Park/hjk00135 ID. Hillers, J.K. 135 Yellowstone National Park, Wyoming. Part of Upper Geyser Basin. #1:/Yellowstone National Park/hjk00136 ID. Hillers, J.K. 136 Yellowstone National Park, Wyoming. Grotto Geyser in Upper Geyser Basin in eruption. #1:/Yellowstone National Park/hjk00137 ID. Hillers, J.K. 137 Yellowstone National Park, Wyoming. Part of Upper Geyser Basin. #1:/Yellowstone National Park/hjk00138 ID. Hillers, J.K. 138 Yellowstone National Park, Wyoming. Giant Geyser and others in Upper Geyser Basin. #1:/Yellowstone National Park/hjk00139 ID. Hillers, J.K. 139 Yellowstone National Park, Wyoming. Punch Bowl in Upper Geyser Basin. #1:/Yellowstone National Park/hjk00140 ID. Hillers, J.K. 140 Yellowstone National Park, Wyoming. Castle Geyser in Upper Geyser Basin in eruption. #1:/Yellowstone National Park/hjk00141 ID. Hillers, J.K. 141 Yellowstone National Park, Wyoming. Castle Geyser in Upper Geyser Basin. #1:/Yellowstone National Park/hjk00142 ID. Hillers, J.K. 142 Yellowstone National Park, Wyoming. Castle Geyser in Upper Geyser Basin in eruption. #1:/Yellowstone National Park/hjk00143 ID. Hillers, J.K. 143 Yellowstone National Park, Wyoming. Mortar Geyser in Upper Geyser Basin in eruption. #1:/Yellowstone National Park/hjk00144 ID. Hillers, J.K. 144 Yellowstone National Park, Wyoming. Mortar Geyser in Upper Geyser Basin in eruption. #1:/Yellowstone National Park/hjk00145 ID. Hillers, J.K. 145 Yellowstone National Park, Wyoming. Mortar Geyser in Upper Geyser Basin in eruption. #1:/Yellowstone National Park/hjk00146 ID. Hillers, J.K. 146 Yellowstone National Park, Wyoming. Comet Geyser in Upper Geyser Basin in eruption. #1:/Yellowstone National Park/hjk00147 ID. Hillers, J.K. 147 Yellowstone National Park, Wyoming. Great Falls of the Yellowstone River. #1:/Yellowstone National Park/hjk00148 ID. Hillers, J.K. 148 Yellowstone National Park, Wyoming. Great Falls of the Yellowstone River. Reduction of photo hjk00147. #1:/Yellowstone National Park/hjk00149 ID. Hillers, J.K. 149 Yellowstone National Park, Wyoming. Great Falls of the Yellowstone River. #1:/Charleston, South Carolina, Earthquake August 31, 1886/hjk0014a ID. Hillers, J.K. 14a Charleston, South Carolina, Earthquake August 31, 1886. Displaced coping on the portico of the old guardhouse on the southwest corner of Meeting and Broad Streets. Photo by C.C. Jones, September 1886. Plate 15, Annual Report 9 of the United States Geological Survey 1887-88. #1:/Yellowstone National Park/hjk00150 ID. Hillers, J.K. 150 Yellowstone National Park, Wyoming. Great Falls of the Yellowstone River, viewed from a high point. Streak down the center of the negative. #1:/Yellowstone National Park/hjk00151 ID. Hillers, J.K. 151 Yellowstone National Park, Wyoming. Great Falls of the Yellowstone River, viewed from half a mile below. #1:/Yellowstone National Park/hjk00152 ID. Hillers, J.K. 152 Yellowstone National Park, Wyoming. Great Falls of the Yellowstone River, viewed from the right bank. #1:/Yellowstone National Park/hjk00153 ID. Hillers, J.K. 153 Yellowstone National Park, Wyoming. Down the gorge of the Yellowstone River, below the falls. #1:/Yellowstone National Park/hjk00154 ID. Hillers, J.K. 154 Yellowstone National Park, Wyoming. Great Falls of the Yellowstone River, viewed from three-quarters of a mile below. #1:/Yellowstone National Park/hjk00155 ID. Hillers, J.K. 155 Yellowstone National Park, Wyoming. Down the Canyon of the Yellowstone River. #1:/Yellowstone National Park/hjk00156 ID. Hillers, J.K. 156 Yellowstone National Park, Wyoming. Upper walls of the Canyon of the Yellowstone River. #1:/Yellowstone National Park/hjk00157 ID. Hillers, J.K. 157 Yellowstone National Park, Wyoming. Canyon walls of the Yellowstone River. #1:/Yellowstone National Park/hjk00158 ID. Hillers, J.K. 158 Yellowstone National Park, Wyoming. From south of Grand View above the Canyon of the Yellowstone River. #1:/Yellowstone National Park/hjk00160 ID. Hillers, J.K. 160 Yellowstone National Park, Wyoming. Firehole River Falls, looking up the river. #1:/Yellowstone National Park/hjk00161 ID. Hillers, J.K. 161 Yellowstone National Park, Wyoming. Rapids of the Gibbon River. #1:/Yellowstone National Park/hjk00162 ID. Hillers, J.K. 162 Yellowstone National Park, Wyoming. Down the Gibbon River. #1:/Yellowstone National Park/hjk00163 ID. Hillers, J.K. 163 Yellowstone National Park, Wyoming. Up the Gibbon River. #1:/Hillers J.K. Collection/hjk00164 ID. Hillers, J.K. 164 Natural Bridge. Rockbridge County, Virginia.n.d. #1:/Hillers J.K. Collection/hjk00165 ID. Hillers, J.K. 165 Kennesaw Mountain. Cobb County, Georgia. ca. 1894. #1:/Hillers J.K. Collection/hjk00166 ID. Hillers, J.K. 166 Stone Mountain. De Kalb County, Georgia. ca. 1894. #1:/Hillers J.K. Collection/hjk00168 ID. Hillers, J.K. 168 Tallulah Falls, main falls. Rubun County, Georgia. ca. 1894. #1:/Hillers J.K. Collection/hjk00169 ID. Hillers, J.K. 169 Tallulah River and gorge. Rabun County, Georgia. ca. 1894. #1:/Hillers J.K. Collection/hjk00170 ID. Hillers, J.K. 170 Tallulah Falls. Rabun County, Georgia. ca. 1894. #1:/Hillers J.K. Collection/hjk00171 ID. Hillers, J.K. 171 Little falls of Tallulah River. Rabun County, Georgia. ca. 1894. #1:/Hillers J.K. Collection/hjk00172 ID. Hillers, J.K. 172 Little falls of Tallulah River. Rabun County, Georgia. ca. 1894. #1:/Hillers J.K. Collection/hjk00173 ID. Hillers, J.K. 173 Falls in Tallulah River. Rabun County, Georgia. ca. 1894. #1:/Hillers J.K. Collection/hjk00174 ID. Hillers, J.K. 174 Typical iron furnace. Southeastern U.S. ca. 1894. #1:/Hillers J.K. Collection/hjk00175 ID. Hillers, J.K. 175 Gorge of Doe River, two miles above Hampton. Carter County, Tennessee. ca. 1894. #1:/Hillers J.K. Collection/hjk00176 ID. Hillers, J.K. 176 Doe River. Carter County, Tennessee. ca. 1894. #1:/Hillers J.K. Collection/hjk00177 ID. Hillers, J.K. 177 On Doe River. Carter County, Tennessee. ca. 1894. #1:/Hillers J.K. Collection/hjk00178 ID. Hillers, J.K. 178 Head of Doe River Gorge. Carter County, Tennessee. ca. 1894. #1:/Hillers J.K. Collection/hjk00179 ID. Hillers, J.K. 179 Doe River and lower tunnel. Carter County, Tennessee. ca. 1894. #1:/Hillers J.K. Collection/hjk00180 ID. Hillers, J.K. 180 Doe River, from railroad bridge. Carter County, Tennessee. ca. 1894. #1:/Hillers J.K. Collection/hjk00181 ID. Hillers, J.K. 181 View down Doe River Valley. Carter County, Tennessee. ca. 1894. #1:/Hillers J.K. Collection/hjk00182 ID. Hillers, J.K. 182 Rhododendron in foreground. View from Mount Mitchell along the summit of Black Mountain Range. Yancey County, North Carolina. ca. 1894. #1:/Hillers J.K. Collection/hjk00183 ID. Hillers, J.K. 183 French Broad River. Madison County, North Carolina. ca. 1894. #1:/Hillers J.K. Collection/hjk00184 ID. Hillers, J.K. 184 French Broad River. Madison County, North Carolina. ca. 1894. #1:/Hillers J.K. Collection/hjk00185 ID. Hillers, J.K. 185 Paint Rock. French Broad River. Madison County, North Carolina. ca. 1894. #1:/Hillers J.K. Collection/hjk00186 ID. Hillers, J.K. 186 View on French Broad River. Madison County, North Carolina. ca. 1894. #1:/Hillers J.K. Collection/hjk00187 ID. Hillers, J.K. 187 Ore pit at Cranberry iron mines. Avery County, North Carolina. ca. 1894. #1:/Hillers J.K. Collection/hjk00188 ID. Hillers, J.K. 188 Buildings and works at Cranberry iron mines. Avery County, North Carolina. ca. 1894. #1:/Hillers J.K. Collection/hjk00189 ID. Hillers, J.K. 189 Cranberry iron works. Avery County, North Carolina. ca. 1894. #1:/Hillers J.K. Collection/hjk00190 ID. Hillers, J.K. 190 Cranberry iron mines and works. Avery County, North Carolina. ca. 1894. #1:/Hillers J.K. Collection/hjk00191 ID. Hillers, J.K. 191 Belleview Farm at Cranberry. Avery County, North Carolina. ca. 1894. #1:/Hillers J.K. Collection/hjk00192 ID. Hillers, J.K. 192 Ore pits at Cranberry. Avery County, North Carolina. ca. 1894. #1:/Hillers J.K. Collection/hjk00193 ID. Hillers, J.K. 193 One of the ore pits at Cranberry iron mines. Avery County, North Carolina. ca. 1894. #1:/Hillers J.K. Collection/hjk00194 ID. Hillers, J.K. 194 Mountains north of Cranberry. Avery County, North Carolina. ca. 1894. #1:/Hillers J.K. Collection/hjk00195 ID. Hillers, J.K. 195 Johnson Canyon east of Ash Fork. Coconino County, Arizona.n.d. #1:/Hillers J.K. Collection/hjk00196 ID. Hillers, J.K. 196 Esmeralda Inn at Cranberry. Avery County, North Carolina. ca. 1894. #1:/Hillers J.K. Collection/hjk00197 ID. Hillers, J.K. 197 Hickory Nut Gap, from Chimney Rock. North Carolina. ca. 1894. #1:/Hillers J.K. Collection/hjk00198 ID. Hillers, J.K. 198 Hickory Nut Gap. North Carolina. ca. 1894. #1:/Hillers J.K. Collection/hjk00199 ID. Hillers, J.K. 199 Hickory Nut Gap. North Carolina. ca. 1894. #1:/Hillers J.K. Collection/hjk00200 ID. Hillers, J.K. 200 Hickory Nut Valley at Gerton. Henderson County, North Carolina. ca. 1894. #1:/Hillers J.K. Collection/hjk00201 ID. Hillers, J.K. 201 Hickory Nut Creek. North Carolina. ca. 1894. #1:/Hillers J.K. Collection/hjk00202 ID. Hillers, J.K. 202 View from top of Blue Ridge Gap. North Carolina. ca. 1894. #1:/Hillers J.K. Collection/hjk00203 ID. Hillers, J.K. 203 View from top of Blue Ridge Gap. North Carolina. ca. 1894. #1:/Hillers J.K. Collection/hjk00204 ID. Hillers, J.K. 204 Crater Lake. Crater Lake National Park. Klamath County, Oregon.n.d. (Composite) #1:/Hillers J.K. Collection/hjk00205 ID. Hillers, J.K. 205 View of New River, with Cotton Hill in the distance. West Virginia. ca. 1894. #1:/Hillers J.K. Collection/hjk00206 ID. Hillers, J.K. 206 (Panorama) 207 Hawks Nest on New River. Fayette County, West Virginia. ca. 1894. #1:/Hillers J.K. Collection/hjk00207 ID. Hillers, J.K. 207 (Panorama) 206 Hawks Nest on New River. Fayette County, West Virginia. ca. 1894. #1:/Hillers J.K. Collection/hjk00208 ID. Hillers, J.K. 208 (Panorama) 209 New River, looking downstream from Sunnyside mine. West Virginia. ca. 1894. #1:/Hillers J.K. Collection/hjk00209 ID. Hillers, J.K. 209 (Panorama) 208 New River, looking downstream from Sunnyside mine. West Virginia. ca. 1894. #1:/Hillers J.K. Collection/hjk00210 ID. Hillers, J.K. 210 New River below Hawks Nest. View downstream from bend above Cotton Hill. West Virginia. ca. 1894. #1:/New River Gorge National River/hjk00211 ID. Hillers, J.K. 211 New River Gorge National River, West Virginia. Down New River from near Stone Cliff. Circa 1894. #1:/Hillers J.K. Collection/hjk00212 ID. Hillers, J.K. 212 New River looking downstream from Sunnyside mine. West Virginia. ca. 1894. #1:/Hillers J.K. Collection/hjk00213 ID. Hillers, J.K. 213 Hawks Nest Station, showing abandoned by-products ovens. Fayette County, West Virginia. ca. 1894. #1:/Hillers J.K. Collection/hjk00214 ID. Hillers, J.K. 214 Kanawha River below Kanawha Falls. West Virginia. ca. 1894. #1:/Hillers J.K. Collection/hjk00215 ID. Hillers, J.K. 215 View up New River below Cotton Hill. West Virginia. ca. 1894. #1:/Hillers J.K. Collection/hjk00216 ID. Hillers, J.K. 216 View up New River from the bridge at Hawks Nest. West Virginia. ca. 1894. #1:/Hillers J.K. Collection/hjk00217 ID. Hillers, J.K. 217 View up New River from point midway between Thurmond and Stone Cliff. West Virginia. ca. 1894. #1:/Hillers J.K. Collection/hjk00218 ID. Hillers, J.K. 218 Gravel and sand in cut on Chase Street, Baltimore County, Maryland.n.d. #1:/Hillers J.K. Collection/hjk00219 ID. Hillers, J.K. 219 Columbia Formation on Potomac sands in northern part of Baltimore. Baltimore County, Maryland.n.d. #1:/Hillers J.K. Collection/hjk00220 ID. Hillers, J.K. 220 Columbia Formation on Potomac sands in northern part of Baltimore. Baltimore County, Maryland.n.d. #1:/Hillers J.K. Collection/hjk00221 ID. Hillers, J.K. 221 W.J. McGee in photo of Columbia Formation on Potomac sands, in northern part of Baltimore. Baltimore County, Maryland.n.d. #1:/Hillers J.K. Collection/hjk00222 ID. Hillers, J.K. 222 Potomac overlying formations in face of Maulden's Mountain on the head of Chesapeake Bay. Maryland.n.d. #1:/Hillers J.K. Collection/hjk00223 ID. Hillers, J.K. 223 Columbia Formation, head of Chesapeake Bay. Maryland.n.d. #1:/Hillers J.K. Collection/hjk00224 ID. Hillers, J.K. 224 Columbia Formation on Potomac Formation, White Bluff, head of Chesapeake Bay. Maryland.n.d. #1:/Hillers J.K. Collection/hjk00225 ID. Hillers, J.K. 225 Columbia Formation on Potomac Formation, White Bluff, head of Chesapeake Bay. Maryland.n.d. #1:/Hillers J.K. Collection/hjk00226 ID. Hillers, J.K. 226 Center of Grove Point. Cecil County, Maryland.n.d. Published as plate 67 in U.S. Geological Survey. Annual Report no. 7, 1885 - 1886. 1888. #1:/Hillers J.K. Collection/hjk00227 ID. Hillers, J.K. 227 Unconformity between Columbia and Potomac Formations. Cecil County, Maryland. n.d. Published as plate 64 in U.S. Geological Survey. Annual Report no. 7, 1885 - 1886. 1888. #1:/Hillers J.K. Collection/hjk00228 ID. Hillers, J.K. 228 Unconformity between Columbia and Potomac Formations. Cecil County, Maryland. n.d. Published as plate 63 in U.S. Geological Survey. Annual Report no. 7, 1885 - 1886. 1888. #1:/Hillers J.K. Collection/hjk00229 ID. Hillers, J.K. 229 Turkey Point. Cecil County, Maryland.n.d. Published as plate 65 in U.S. Geological Survey. Annual Report no. 7, 1885 - 1886. 1888. #1:/Hillers J.K. Collection/hjk00230 ID. Hillers, J.K. 230 Upper terrace at Ordinary Point. Kent County, Maryland.n.d. Published as plate 71 in U.S. Geological Survey. Annual Report no. 7, 1885- 1886. 1888. #1:/Hillers J.K. Collection/hjk00232 ID. Hillers, J.K. 232 Area in which Columbia loan has been excavated for brick clay. Near East Capitol Street between 16th and 17th Streets. Washington, D.C. n.d. #1:/Hillers J.K. Collection/hjk00233 ID. Hillers, J.K. 233 Capitol as seen from the marsh, Anacostia River. Washington, D.C.n.d. #1:/Hillers J.K. Collection/hjk00234 ID. Hillers, J.K. 234 Columbia loam in excavation for new library building, Washington, D.C. Library of Congress or Washington, D.C., Library? Washington, D.C.n.d. #1:/Hillers J.K. Collection/hjk00235 ID. Hillers, J.K. 235 Section of Columbia formation showing gravel below and loam above. Washington, D.C.n.d. #1:/Hillers J.K. Collection/hjk00236 ID. Hillers, J.K. 236 Chesapeake formation on Miocene on road to Good Hope. Washington, D.C.n.d. #1:/Hillers J.K. Collection/hjk00237 ID. Hillers, J.K. 237 Columbia brick-loam at Brickhaven. Note closely-set vertical joints in central bed. Virginia.n.d. #1:/Hillers J.K. Collection/hjk00238 ID. Hillers, J.K. 238 Columbia brick-loam in Brickhaven. Virginia.n.d. #1:/Hillers J.K. Collection/hjk00240 ID. Hillers, J.K. 240 Potomac Formation at Cockpit Point. Virginia.n.d. #1:/Hillers J.K. Collection/hjk00241 ID. Hillers, J.K. 241 Potomac Formation at Cockpit Point. Virginia.n.d. #1:/Hillers J.K. Collection/hjk00242 ID. Hillers, J.K. 242 Potomac Formation at Cockpit Point. Virginia.n.d. #1:/Hillers J.K. Collection/hjk00243 ID. Hillers, J.K. 243 Columbia terrace at Fredericksburg. Spotsylvania County, Virginia.n.d. (Negative cracked) #1:/Hillers J.K. Collection/hjk00244 ID. Hillers, J.K. 244 Columbia terraces on the Rappahannock river at Fredericksburg. Spotsylvania County, Virginia.n.d. (Negative cracked) #1:/Hillers J.K. Collection/hjk00245 ID. Hillers, J.K. 245 Inside slope of rim of Coon Butte (Crater Mound) Meteor Crater. Coconino County, Arizona.n.d. #1:/Hillers J.K. Collection/hjk00248 ID. Hillers, J.K. 248 Wax model by Bailey Willis illustrating mountain uplift. Stages A to G, model HII. 1 n.d. Published as plate 88 in U.S. Geological Survey. Annual Report no. 13, pt. 2, 1891 - 1892. 1893. #1:/Hillers J.K. Collection/hjk00249 ID. Hillers, J.K. 249 Wax model by Bailey Willis illustrating mountain uplift. Stages A to K, model K.n.d. Published asplate 90 in U.S. Geological Survey. Annual Report no. 13, pt. 2, 1891 - 1892. 1893. #1:/Hillers J.K. Collection/hjk00250 ID. Hillers, J.K. 250 Wax model by Bailey Willis illustrating mountain uplift. Stages A to G, model D.n.d. Published asplate 81 in U.S. Geological Survey. Annual Report no. 13, pt. 2, 1891 - 1892. 1893. #1:/Hillers J.K. Collection/hjk00251 ID. Hillers, J.K. 251 Wax model by Bailey Willis illustrating mountain uplift. Stages A to I, model DII.n.d. Published asplate 82 in U.S. Geological Survey. Annual Report no. 13, pt. 2, 1891 - 1892. 1893. #1:/Hillers J.K. Collection/hjk00252 ID. Hillers, J.K. 252 Step-fold in slate.n.d. (Negative cracked). Published as plate 74 (lower photo) in U.S. Geological Survey. Annual Report no. 13, pt. 2, 1891-1892. 1893. #1:/Hillers J.K. Collection/hjk00254 ID. Hillers, J.K. 254 Wax model by Bailey Willis illustrating mountain uplift. Stages A to K, model E.n.d. #1:/Hillers J.K. Collection/hjk00260 ID. Hillers, J.K. 260 View on French Broad River. Western North Carolina. ca. 1894. #1:/Yosemite National Park/hjk0028a ID. Hillers, J.K. 28a Yosemite National Park, California. Cathedral spires in Yosemite Valley. 1892. Negative in poor condition. #1:/Yosemite National Park/hjk0028b ID. Hillers, J.K. 28b Yosemite National Park, California. Cathedral Rocks and Cathedral Spires. The Cathedral Rocks are among the most massive rock forms in the valley; the Cathedral Spires are among the frailest. On the summits of the Cathedral Rocks lie glacial boulders which show that the ancient Yosemite Glacier once completely overwhelmed these rock masses. 1892. Plate 18, U.S. Geological Survey Professional Paper 160. #1:/Hillers J.K. Collection/hjk00309 ID. Hillers, J.K. 309 New River. West Virginia. ca. 1894. #1:/Hillers J.K. Collection/hjk00363 ID. Hillers, J.K. 363 Model of Coon Butte (Crater Mound) Meteor Crater. Coconino County, Arizona. n.d. #1:/Yosemite National Park/hjk0037a ID. Hillers, J.K. 37a Yosemite National Park, California. Storm clouds in Yosemite Valley with Royal Arches on the left. 1892. #1:/Hillers J.K. Collection/hjk00401 ID. Hillers, J.K. 401 Wax model of mountain making experiments by Bailey Willis. 1891. #1:/Hillers J.K. Collection/hjk00402 ID. Hillers, J.K. 402 Wax model of mountain making experiments by Bailey Willis. 1891. #1:/Hillers J.K. Collection/hjk00403 ID. Hillers, J.K. 403 Wax model of mountain making experiments by Bailey Willis. 1891. #1:/Hillers J.K. Collection/hjk00404 ID. Hillers, J.K. 404 Wax model of mountain making experiments by Bailey Willis. 1891. #1:/Hillers J.K. Collection/hjk00405 ID. Hillers, J.K. 405 Wax model of mountain making experiments by Bailey Willis. 1891. #1:/Hillers J.K. Collection/hjk00406 ID. Hillers, J.K. 406 Wax model of mountain making experiments by Bailey Willis. 1891. #1:/Hillers J.K. Collection/hjk00407 ID. Hillers, J.K. 407 Wax model of mountain making experiments by Bailey Willis. 1891. #1:/Hillers J.K. Collection/hjk00408 ID. Hillers, J.K. 408 Wax model of mountain making experiments by Bailey Willis. 1891. #1:/Hillers J.K. Collection/hjk00409 ID. Hillers, J.K. 409 Wax model of mountain making experiments by Bailey Willis. 1891. #1:/Hillers J.K. Collection/hjk00410 ID. Hillers, J.K. 410 Wax model of mountain making experiments by Bailey Willis. 1891. #1:/Hillers J.K. Collection/hjk00411 ID. Hillers, J.K. 411 Wax model of mountain making experiments by Bailey Willis. 1891. #1:/Hillers J.K. Collection/hjk00412 ID. Hillers, J.K. 412 Wax model of mountain making experiments by Bailey Willis. 1891. #1:/Hillers J.K. Collection/hjk00413 ID. Hillers, J.K. 413 Wax model of mountain making experiments by Bailey Willis. 1891. #1:/Hillers J.K. Collection/hjk00414 ID. Hillers, J.K. 414 Wax model of mountain making experiments by Bailey Willis. 1891. #1:/Hillers J.K. Collection/hjk00415 ID. Hillers, J.K. 415 Wax model of mountain making experiments by Bailey Willis. 1891. #1:/Hillers J.K. Collection/hjk00416 ID. Hillers, J.K. 416 Wax model of mountain making experiments by Bailey Willis. Nine stages of F model and 8 stages of F-1 model. 1891. #1:/Hillers J.K. Collection/hjk00418 ID. Hillers, J.K. 418 Tantalus Creek, mouth of Tantalus Canyon, Aquarius Plateau. Utah.n.d. #1:/Hillers J.K. Collection/hjk00420 ID. Hillers, J.K. 420 Old time rocks in Tantalus Creek, Aquarius Plateau. Utah.n.d. #1:/Hillers J.K. Collection/hjk00421 ID. Hillers, J.K. 421 Annus Glen, Winslow Creek. Garfield County, Utah.n.d. #1:/Hillers J.K. Collection/hjk00424 ID. Hillers, J.K. 424 Tantalus Creek, Aquarius Plateau. Utah.n.d. #1:/Hillers J.K. Collection/hjk00425 ID. Hillers, J.K. 425 On Boulder Creek, Aquarius Plateau. Utah.n.d. #1:/Beaman E.O. Collection-Hillers J.K. Collection/hjk00427 ID. Hillers, J.K. 427 Flaming Gorge, Green River, just inside the entrance which is at the right. Daggett County, Utah. 1871. Photo by E.O. Beaman) #1:/Beaman E.O. Collection-Hillers J.K. Collection/hjk00428 ID. Hillers, J.K. 428 The Heart of Lodore, Green River.F.S. Dellenbaugh is seated and reflected in the water. Dinosaur National Monument. Moffat County, Colorado. 1871. Photo by E.O. Beaman) #1:/Hillers J.K. Collection/hjk00431 ID. Hillers, J.K. 431 Grand Canyon, looking east from Toroweap. Arizona.n.d. #1:/Hillers J.K. Collection/hjk00432 ID. Hillers, J.K. 432 In Glen Canyon. Colorado River.n.d. #1:/Hillers J.K. Collection/hjk00433 ID. Hillers, J.K. 433 Grand Canyon, near Toroweap (or Mauv). Arizona.n.d. #1:/Hillers J.K. Collection/hjk00434 ID. Hillers, J.K. 434 Grand Canyon, near foot of Toroweap, looking east. Arizona.n.d. #1:/Beaman E.O. Collection-Hillers J.K. Collection/hjk00435 ID. Hillers, J.K. 435 Grand Canyon. Arizona.n.d. Photo by E.O. Beaman) #1:/Hillers J.K. Collection/hjk00437 ID. Hillers, J.K. 437 Grand Canyon. Arizona.n.d. #1:/Hillers J.K. Collection/hjk00438 ID. Hillers, J.K. 438 Grand Canyon (near Toroweap?) Arizona.n.d. #1:/Hillers J.K. Collection/hjk00439 ID. Hillers, J.K. 439 Red Canyon, Green River. Ashley Falls from above. Daggett County, Utah.n.d. #1:/Hillers J.K. Collection/hjk00440 ID. Hillers, J.K. 440 Outlet, Surprise Valley, about ten miles above the mouth of Kanab Canyon. (Thompson Valley Outlet).n.d. #1:/Hillers J.K. Collection/hjk00441 ID. Hillers, J.K. 441 Pink Cliffs. Kane County, Utah.n.d. #1:/Beaman E.O. Collection-Hillers J.K. Collection/hjk00444 ID. Hillers, J.K. 444 Powell party ready to start. This spot is on left bank about 1/2 mile below Union Pacific Railroad bridge. Figures from left to right are: in the Canonita, Andrew Hattan, W.C. Powell, E.O. Beaman; in the Nellie Powell, Professor A.H. Thompson, J.F. Steward, F.M. Bishop, Frank C.A. Richardson. Green River Station. Sweetwater County, Wyoming. May 1871. Photo by E.O. Beaman). Published as illustration no. 4 in Darrah, W.C. Powell of the Colorado. Princeton University press, 1951. #1:/Grand Canyon National Park/hjk00445 ID. Hillers, J.K. 445 Grand Canyon National Park, Arizona. Major Powell's armchair on a boat in Marble Canyon. Photo by E.O. Beaman, August 20, 1872.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). #1:/Hillers J.K. Collection/hjk00446 ID. Hillers, J.K. 446 Bonita Bend in Green River. It is here that Stillwater Canyon begins and Labyrinth ends. Utah.n.d. #1:/Hillers J.K. Collection/hjk00448 ID. Hillers, J.K. 448 Bee Lake? on Aquarius Plateau. Utah.n.d. #1:/Grand Canyon National Park/hjk00449 ID. Hillers, J.K. 449 Grand Canyon National Park, Arizona. Sockdologer Rapid, above Bright Angel Creek. August 29, 1872.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). #1:/Hillers J.K. Collection/hjk00450 ID. Hillers, J.K. 450 The Inupin Pikavu Witch's Water Pocket, Mt. Trumbull region. Mohave County, Arizona.n.d. #1:/Grand Canyon National Park/hjk00451 ID. Hillers, J.K. 451 Grand Canyon National Park, Arizona. Grand Canyon. August 26, 1872.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). #1:/Hillers J.K. Collection/hjk00452 ID. Hillers, J.K. 452 Green River, Canyon of Desolation. Utah.n.d. #1:/Hillers J.K. Collection/hjk00454 ID. Hillers, J.K. 454 Lake in Kanab Canyon, about three miles above Kanab. Kane County, Utah.n.d. #1:/Hillers J.K. Collection/hjk00455 ID. Hillers, J.K. 455 Pink Cliffs. Kane County, Utah.n.d. #1:/Hillers J.K. Collection/hjk00456 ID. Hillers, J.K. 456 Cross-bedding in Navajo sandstone, near Kanab. Kane County, Utah.n.d. #1:/Hillers J.K. Collection/hjk00459 ID. Hillers, J.K. 459 Flaming Gorge, Green River, showing entrance at right, upstream. Daggett County, Utah. 1871. #1:/Hillers J.K. Collection/hjk00461 ID. Hillers, J.K. 461 Steward in boat in Canyon of Desolation, Green River. The upper boat is being lowered into the river. Utah. August 19, 1871. (Negative broken) #1:/Hillers J.K. Collection/hjk00462 ID. Hillers, J.K. 462 Keam's Canyon. Keam's Trading Post, about 14 miles from East Mesa of the Moki towns. Navajo County, Arizona. ca. 1880. #1:/Hillers J.K. Collection/hjk00463 ID. Hillers, J.K. 463 Keam's Canyon. Close-up of town. Navajo County, Arizona. ca. 1880. #1:/Hillers J.K. Collection/hjk00464 ID. Hillers, J.K. 464 One of the three lakes in Kanab Canyon, above Kanab. Kane County, Utah.n.d. #1:/Hillers J.K. Collection/hjk00466 ID. Hillers, J.K. 466 Lower lake. One of three lakes in Kanab Canyon, above Kanab. Kane County, Utah.n.d. #1:/Hillers J.K. Collection/hjk00468 ID. Hillers, J.K. 468 Pink Cliffs. Kane County, Utah.n.d. #1:/Hillers J.K. Collection/hjk00469 ID. Hillers, J.K. 469 Pink Cliffs. Kane County, Utah.n.d. #1:/Beaman E.O. Collection-Hillers J.K. Collection/hjk00471 ID. Hillers, J.K. 471 The first camp of Powell's Second Expedition. Shown from left to right are: Professor Almon Harris Thompson, Andrew Hattan, S.V. Jones, John F. Steward, W.C. Powell, Frank C.A. Richardson, Frederick Dellenbaugh, and F.M. Bishop. Green River, Wyoming. May 4, 1871. Photo by E.O. Beaman). Published opposite p. 25 in Utah State Historical Society. Utah Historical Quarterly, v. 16 - 17. 1948 - 49. #1:/Hillers J.K. Collection/hjk00472 ID. Hillers, J.K. 472 Red Canyon, Green River. Daggett County, Utah. 1871. #1:/Beaman E.O. Collection-Dinosaur National Monument/hjk00473 ID. Hillers, J.K. 473 Green River, Canyon of Lodore, just within the "Gate," looking down. Dinosaur National Monument. Moffat County, Colorado. June 17, 1871. (Photo by E.O. Beaman) Published opposite p. 193 in Utah State Historical Society. Utah Historical Quarterly, v. 16 - 17. 1948 - 1949. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00475 ID. Hillers, J.K. 475 Colorado River. Sentinel Rock at mouth of Sentinel Creek. Glen Canyon between Crossing of the Fathers and the Paria River. #1:/Canyonlands National Park/hjk00476 ID. Hillers, J.K. 476 Canyonlands National Park, Utah. Bowknot Bend of the Green River, looking east from the west end of a narrow intervening saddle. Photo by E.0. Beaman, September 10, 1871. Second expedition of the U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Figure 62(upper photo), U.S. Geological Survey Bulletin 1327. #1:/Beaman E.O. Collection-Dinosaur National Monument/hjk00480 ID. Hillers, J.K. 480 Buttes near Green River Station, Union Pacific Railroad. Portable darkroom stand at right Sweetwater County, Wyoming. 1871. Photo by E.O. Beaman) #1:/Beaman E.O. Collection-Dinosaur National Monument/hjk00481 ID. Hillers, J.K. 481 Green River. Ashley Falls in Red Canyon. Daggett County, Utah. 1871. Photo by E.O. Beaman) #1:/Beaman E.O. Collection-Dinosaur National Monument/hjk00482 ID. Hillers, J.K. 482 Green River Station, Union Pacific Railroad. Ruins of adobe houses which were abandoned when construction work on the railroad was moved to another point. Sweetwater County, Wyoming. 1871. Photo by E.O.Beaman) #1:/Beaman E.O. Collection-Dinosaur National Monument/hjk00483 ID. Hillers, J.K. 483 Green River, about 1/2 mile below Union Pacific Railroad bridge, showing boats soon after they had been run down from unloading at bridge. River flows to the left. 1871. Photo by E.O. Beaman) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00485 ID. Hillers, J.K. 485 Freaks of erosion.n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00486 ID. Hillers, J.K. 486 "Fantastic Rock," foot of Brown's Park, Vermillion Creek. Colorado? n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00487 ID. Hillers, J.K. 487 The Tower on Vermillion Creek, Brown's Park. Colorado? n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00488 ID. Hillers, J.K. 488 The Tower on Vermillion Creek, Brown's Park. Colorado? n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00489 ID. Hillers, J.K. 489 "Twin Pinnacles," on Ashley Creek, Green River. Uintah County, Utah.n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00490 ID. Hillers, J.K. 490 Rock Pinnacle on Ashley Fork. Uintah County, Utah.n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00491 ID. Hillers, J.K. 491 Rocky gorge of Brush Creek, on Ashley Fork, Green River. Uintah County, Utah.n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00495 ID. Hillers, J.K. 495 Rocky gorge of Brush Creek, on Ashley Fork, Green River. Uintah County, Utah.n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00497 ID. Hillers, J.K. 497 Center of Horseshoe Canyon, Green River. Daggett County, Utah. 1871. (Stereoscopic view) #1:/Beaman E.O. Collection-Dinosaur National Monument/hjk00498 ID. Hillers, J.K. 498 Low water. Red Canyon, Green River. Daggett County, Utah.n.d. Photo by E.O. Beaman) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00499 ID. Hillers, J.K. 499 Rocky wall of Red Canyon. Daggett County, Utah. 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00500 ID. Hillers, J.K. 500 Canyon of Lodore, Green River. Dinosaur National Monument. Moffat County, Colorado. 1871? (Forms a stereoscopic view with Hillers, J.K., 500a) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00501 ID. Hillers, J.K. 501 Heart of Lodore, Green River. Dinosaur National Monument. Moffat County, Colorado. June 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00502 ID. Hillers, J.K. 502 A rapid in the Canyon of Lodore, Green River. Dinosaur National Monument. Moffat County, Colorado.n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00503 ID. Hillers, J.K. 503 Canyon of Lodore, Green River. Dinosaur National Monument. Moffat County, Colorado. June 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00504 ID. Hillers, J.K. 504 Canyon of Lodore, Green River. Dinosaur National Monument. Moffat County, Colorado. June 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00505 ID. Hillers, J.K. 505 James C. Pilling in the Canyon of Lodore, Green River, just within the entrance. Dinosaur National Monument. Moffat County, Colorado. June 1871. (Forms a stereoscopic view with Hillers, J.K., 505a) #1:/Beaman E.O. Collection-Dinosaur National Monument/hjk00506 ID. Hillers, J.K. 506 (Stereoscopic pair)Left bank of Green River. Boats of Powell's Second Expedition, before the start of the journey. The boats are "Canonita," "Emma Dean," and "Nellie Powell." Just below the Union Pacific Railroad bridgeat Green River Station. The famous eleven of the Powell party were Andy Hattan, W. Clement Powell, S.V. Jones, Major John W. Powell, Frederick S. Dellenbaugh, Professor Almon Harris Thompson, John F. Steward, F.M. Bishop, Frank C.A. Richardson, Jack Hillers, and E.O. Beaman. Sweetwater County, Wyoming. 1871. (Photo by E.O. Beaman) #1:/Beaman E.O. Collection-Dinosaur National Monument/hjk00508 ID. Hillers, J.K. 508 Green River, above Flaming Gorge. Sweetwater County, Wyoming. May 23, 1871. (Photo by E.O. Beaman) #1:/Beaman E.O. Collection-Dinosaur National Monument/hjk00510 ID. Hillers, J.K. 510 Green River, above Flaming Gorge. Sweetwater County, Wyoming. 1871. (Photo by E.O. Beaman). (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00511 ID. Hillers, J.K. 511 Colorado River. Grand Canyon, near foot of Toroweap, looking east. Arizona. n.d. (Forms a stereoscopic view with Hillers, J.K. 511a) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00512 ID. Hillers, J.K. 512 Flaming Gorge, Green River. Just inside entrance which is at the right, looking downstream. Daggett County, Utah. 1871). Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00515 ID. Hillers, J.K. 515 Lava Falls, Colorado River, Grand Canyon. Arizona. 1872. Published opposite page 69 in Utah State Historical Society. Utah Historical Quarterly, v. 15. 1947. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00517 ID. Hillers, J.K. 517 Chimney Rock on the Green River. 1871). Forms a stereoscopic view with Hillers, J.K. 517a) #1:/Beaman E.O. Collection-Dinosaur National Monument/hjk00518 ID. Hillers, J.K. 518 Jack Hillers sewing in Red Canyon Park, Green River. Daggett County, Utah. 1871. Photo by E.O.Beaman. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00519 ID. Hillers, J.K. 519 Jack Hillers about halfway up the mountain with two saddle horses, Red Canyon Park. Daggett County, Utah.1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00520 ID. Hillers, J.K. 520 Lemon's Peak at Shunesburg, upper Virgin River. Utah.n.d.). (Forms a stereoscopic view with Hillers, J.K.520a) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00521 ID. Hillers, J.K. 521 Green River, Horseshoe Canyon, looking upstream. Daggett County, Utah. 1871.). (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00522 ID. Hillers, J.K. 522 Beehive Point in Kingfisher Canyon. Daggett County, Utah. 1871.). (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00525 ID. Hillers, J.K. 525 At head of Paria River. Utah? n.d.(Stereoscopic view) #1:/Beaman E.O. Collection-Dinosaur National Monument/hjk00527 ID. Hillers, J.K. 527 Green River, Beehive Point on middle right. Utah. 1871. Photo by E.O. Beaman. (Stereoscopic view) #1:/Beaman E.O. Collection-Dinosaur National Monument/hjk00528 ID. Hillers, J.K. 528 Lighthouse Rock in Canyon of Desolation, Green River. The three boats are anchored near shore on leftside. Utah. August 11, 1871. Photo by E.O. Beaman. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00529 ID. Hillers, J.K. 529 Kanab Canyon.n.d. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00532 ID. Hillers, J.K. 532 Virgin River, Parunuweap Branch (Long Valley Branch), (East Branch). Utah. n.d. (Forms a sterioscopic view with Hillers, J.K. 532a) #1:/Beaman E.O. Collection-Dinosaur National Monument/hjk00534 ID. Hillers, J.K. 534 Green River. Red Canyon, one mile below Beehive Point. Daggett County, Utah. 1871). Photo by E.O.Beaman. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00536 ID. Hillers, J.K. 536 Green River in Red Canyon. Daggett Canyon, Utah. 1871). Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00538 ID. Hillers, J.K. 538 Green River in Canyon of Desolation. Utah.n.d.). (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00539 ID. Hillers, J.K. 539 Canyon of Lodore, Green River. Dinosaur National Monument. Moffat County, Colorado.n.d.). (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00541 ID. Hillers, J.K. 541 The "Second Rapid" on Virgin River, Parunuweap Branch. Utah.n.d.). (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00542 ID. Hillers, J.K. 542 Virgin River. Utah.n.d.). Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00543 ID. Hillers, J.K. 543 Glen Canyon, Colorado. Arizona or Utah.n.d.). Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00545 ID. Hillers, J.K. 545 View from small cave in Split Mountain Canyon, Green River. Dinosaur National Monument. Moffat County, Colorado. July 1871). Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00553 ID. Hillers, J.K. 553 Parunuweap Canyon. East Fork of Virgin River between Long Valley(?) and Shunesburg. Utah.n.d. (Stereoscopic view) #1:/Beaman E.O. Collection-Dinosaur National Monument/hjk00554 ID. Hillers, J.K. 554 Powell's party at Ashley Falls, Red Canyon, Green River, after portage of the boats was made. Daggett County, Utah. 1871) Photo by E.O. Beaman. (Stereoscopic view) #1:/Beaman E.O. Collection-Dinosaur National Monument/hjk00555 ID. Hillers, J.K. 555 Portage of boats. Ashley Falls, Red Canyon, Green River. Daggett County, Utah. 1871) Photo by E.O.Beaman. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00556 ID. Hillers, J.K. 556 Small side canyon, a tributary to Red Canyon, Green River. Daggett County, Utah. 1871). (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00559 ID. Hillers, J.K. 559 Camp scene in Red Canyon Park, Green River. Hillers is sewing. Daggett County, Utah. 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00561 ID. Hillers, J.K. 561 Harrell's Camp, Brown's Park. Colorado? 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00562 ID. Hillers, J.K. 562 Canyon of Lodore, Green River. Dinosaur National Monument. Moffat County, Colorado. June 1871. (Stereoscopic view) #1:/Beaman E.O. Collection-Dinosaur National Monument/hjk00566 ID. Hillers, J.K. 566 John F. Steward of Powell's party in Glen Canyon. Utah or Arizona. 1872) Photo by E.O. Beaman. (Negative broken) (Stereoscopic view). Published as upper photo opposite p. 175 in Utah State Historical Society. Utah Historical Quarterly, v. 16 - 17. 1948 - 49. #1:/Beaman E.O. Collection-Dinosaur National Monument/hjk00569 ID. Hillers, J.K. 569 John F. Steward of Powell's party in Glen Canyon. Utah or Arizona. 1872) Photo by E.O. Beaman. (Same as Hillers, J.K. 566, only this is not a stereoscopic view). Published as upper photo opposite p. 175 in Utah State Historical Society. Utah Historical Quarterly, v. 16 - 17. 1948 - 49. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00571 ID. Hillers, J.K. 571 View across Green River in Canyon of Lodore. Dinosaur National Monument. Moffat County, Colorado. June 1871) Negative cracked. (Forms a stereoscopic view with Hillers, J.K., 571a) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00575 ID. Hillers, J.K. 575 Green River in the Canyon of Lodore. Dinosaur National Monument. Moffat County, Colorado.n.d.). (Stereoscopic view) #1:/Beaman E.O. Collection-Dinosaur National Monument/hjk00577 ID. Hillers, J.K. 577 Disaster Falls in Canyon of Lodore, Green River. Dinosaur National Monument. Moffat County, Colorado. June 18, 1871) Photo by E.O. Beaman. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00578 ID. Hillers, J.K. 578 Kanab Canyon. Arizona or Utah? September 1872. (Forms a stereoscopic view with photo 578a) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00584 ID. Hillers, J.K. 584 The Haystack in Canyon of Lodore, Green River. Dinosaur National Monument. Moffat County, Colorado. June 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00585 ID. Hillers, J.K. 585 Dellenbaugh Butte, Green River, near the mouth of San Rafael. Utah.n.d. (Stereoscopic view) #1:/Zion National Park/hjk00586 ID. Hillers, J.K. 586 Zion National Park, Utah. Eagle Crag, Virgin River, west fork in the Mukuntuweap Branch, Little Zion Valley.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Forms a stereoscopic view with photo hjk0586a. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00588 ID. Hillers, J.K. 588 Near view of The Haystack, Canyon of Lodore, Green River. Dinosaur National Monument. Moffat County, Colorado. June 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00589 ID. Hillers, J.K. 589 Shinarump Cliff on Escalante River. Utah.n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00590 ID. Hillers, J.K. 590 Some of Powell's party in boats in Canyon of Lodore, Green River. Dinosaur National Monument Moffat County, Colorado. 1871. Forms stereoscopic view with Hillers, J.K., 590a. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00593 ID. Hillers, J.K. 593 Canyon of Lodore, Green River. Dinosaur National Monument. Moffat County, Colorado. 1871. (Stereoscopic view) #1:/Zion National Park/hjk00594 ID. Hillers, J.K. 594 Zion National Park, Utah. Virgin River, west fork in the Mukuntuweap Branch. U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Stereoscopic view. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00596 ID. Hillers, J.K. 596 On the Colob Plateau. Southern Utah.n.d. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00597 ID. Hillers, J.K. 597 Narrow Canyon? Colorado River.n.d. Stereoscopic view. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00598 ID. Hillers, J.K. 598 Grand Canyon, Colorado River, near Lava Falls. Arizona.n.d. Stereoscopic view. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00600 ID. Hillers, J.K. 600 Echo Park from upper end. Yampa River in foreground coming from the left. Green River enters from the right. Dinosaur National Monument. Moffat County, Colorado. July 1871. Forms stereoscopic view with Hillers, J.K. 600a. #1:/Hillers J.K. Collection-Niagara Falls/hjk0060a ID. Hillers, J.K. 60a Niagara Falls. American Falls as seen from the Canadian side. Niagara County, New York. 1886. #1:/Hillers J.K. Collection-Niagara Falls/hjk0060b ID. Hillers, J.K. 60b Niagara Falls. American Falls as seen from the Canadian side. Niagara County, New York. 1886. (Same photo as no. 60a) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00601 ID. Hillers, J.K. 601 Canyon of Lodore, Green River. Dinosaur National Monument. Moffat County, Colorado. June 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00602 ID. Hillers, J.K. 602 Colorado River, Grand Canyon, below Lava Falls which is seen in the middle distance. Arizona.n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00603 ID. Hillers, J.K. 603 Clem Powell reading while sitting on a boulder in Cataract Canyon, Colorado River. Arizona.n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00604 ID. Hillers, J.K. 604 Canyon of Lodore, Green River. Dinosaur National Monument. Moffat County, Colorado. June 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00605 ID. Hillers, J.K. 605 Major Powell's boat with famous armchair. Grand Canyon, Colorado River. Arizona. n.d. Negative cracked. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00608 ID. Hillers, J.K. 608 On the top of the country immediately at the junction of the Grand (now Colorado) and Green Rivers, westside. Utah. September 17, 1871. Stereoscopic view. #1:/Hillers J.K. Collection-Zion National Park/hjk00609 ID. Hillers, J.K. 609 Virgin River, West Fork. Mukuntuweap or Little Zion. Upper end. Utah. n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00610 ID. Hillers, J.K. 610 Canyon of Lodore, Green River. Dinosaur National Monument. Moffat County, Colorado. June 1871. Stereoscopic view. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00611 ID. Hillers, J.K. 611 Dome-shaped butte. Utah. n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00612 ID. Hillers, J.K. 612 Rapid at Canyon of Lodore, Green River. Head of Hell's Half Mile. Jones, Hillers, and Dellenbaugh in the Emma Dean at foot of rapid. Dinosaur National Monument. Moffat County, Colorado. June 1871. (Stereoscopic view) Published as illustration no. 5 in Darrah, W. C. Powell of the Colorado. Princeton University Press, 1951. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00615 ID. Hillers, J.K. 615 Rough water Lava Falls, Colorado River, Grand Canyon. Arizona. n.d. Shows only a part of falls. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00616 ID. Hillers, J.K. 616 Lava Falls, Colorado River, Grand Canyon. Arizona. n.d. Shows only a part of falls. (Stereoscopic view) #1:/Hillers J.K. Collection-Zion National Park/hjk00617 ID. Hillers, J.K. 617 Zion National Park, Utah. Temple of Aeolus, Virgin River, west fork (north fork) in the Mukuntuweap Brank, Little Zion, upper part. U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Stereoscopic view. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00618 ID. Hillers, J.K. 618 Lava Falls, Colorado River, Grand Canyon. Arizona.n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00620 ID. Hillers, J.K. 620 Dunn's Cliff (2700 feet high), Canyon of Lodore, Green river. Dinosaur National Monument. Moffat County, Colorado. June 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00621 ID. Hillers, J.K. 621 Nearer view of Dunn's Cliff, Canyon of Lodore, Green River. Dinosaur National Monument. Moffat County, Colorado. June 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00622 ID. Hillers, J.K. 622 Kanab Canyon, near Pinnacle (from downstream). Arizona.n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00623 ID. Hillers, J.K. 623 Dangerous water of Lava Falls, Colorado River, Grand Canyon. Arizona.n.d. Forms a stereoscopic view with Hillers, J.K. 623a. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00624 ID. Hillers, J.K. 624 Pink Cliffs. Kane County, Utah.n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00625 ID. Hillers, J.K. 625 Showerbath Spring in Kanab Canyon. Three or four miles above junction with Grand Canyon. Arizona.n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00627 ID. Hillers, J.K. 627 Lava Falls, Colorado River, Grand Canyon. Arizona.n.d. (Stereoscopic view) #1:/Beaman E.O. Collection-Dinosaur National Monument/hjk00628 ID. Hillers, J.K. 628 Canyon of Lodore, Green River. Dinosaur National Monument. Moffat County, Colorado. 1871. Photo by E.O. Beaman. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00629 ID. Hillers, J.K. 629 The Pinnacle in Kanab Canyon. Looking down the canyon. Arizona.n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00630 ID. Hillers, J.K. 630 Angel's Whisper, a side canyon of Lodore Canyon. Dinosaur National Monument. Moffat County, Colorado. June 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00631 ID. Hillers, J.K. 631 Virgin River, East Fork (Parunuweap). Utah.n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00632 ID. Hillers, J.K. 632 Kanab Canyon, near Pinnacle, looking up the canyon. This view was taken around the bend below Hillers Photo #629. Arizona.n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00633 ID. Hillers, J.K. 633 Professor Almon Harris Thompson and his horse "Old Ute." Utah. 1872. Forms a stereoscopic view with Hillers #633a. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00634 ID. Hillers, J.K. 634 Kanab Canyon, near Pinnacle, looking up the canyon. This view was taken around the bend below Hillers #629. Arizona.n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00638 ID. Hillers, J.K. 638 Kanab Canyon. Arizona or Utah? n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00642 ID. Hillers, J.K. 642 Echo Park, looking down from upper end. Yampa River in the foreground. Green River enters from the right. Dinosaur National Monument. Moffat County, Colorado.n.d. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00644 ID. Hillers, J.K. 644 Kanab Canyon? Arizona or Utah? n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00645 ID. Hillers, J.K. 645 Echo Park, looking down from upper end. Yampa River in the foreground. Green River enters from the right. Dinosaur National Monument. Moffat County, Colorado. 1871. (Stereoscopic view) #1:/Zion National Park/hjk00646 ID. Hillers, J.K. 646 Zion National Park, Utah. Head of the Narrows, North Fork Virgin River.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Stereoscopic view. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00647 ID. Hillers, J.K. 647 Kanab Canyon. Arizona or Utah? n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00649 ID. Hillers, J.K. 649 Canyon of Lodore, near lower end, Green River. Dinosaur National Monument. Moffat County, Colorado. June 27, 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00655 ID. Hillers, J.K. 655 View in Horseshoe Canyon? Utah? 1871? (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00657 ID. Hillers, J.K. 657 Green River in Stillwater Canyon. Utah.n.d. (Forms a stereoscopic view with Hillers #657a) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00661 ID. Hillers, J.K. 661 Professor Almon Harris Thompson with his horse "Old Ute." Utah. 1872. (Stereoscopic view). Published opposite p. 425 in Utah State Historical Society. Utah Historical Quarterly, v. 16 - 17. 1948 - 49. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00664 ID. Hillers, J.K. 664 Virgin River, East Fork or Parunuweap, in the canyon. Utah.n.d. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00667 ID. Hillers, J.K. 667 Kanab Canyon. Arizona or Utah? n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00670 ID. Hillers, J.K. 670 Escalante Creek, Water Pocket Canyon. Utah.n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00672 ID. Hillers, J.K. 672 Mouth of Ashley Creek. Uintah County, Utah. July 4, 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00674 ID. Hillers, J.K. 674 Split Mountain. Dinosaur National Monument. Uintah County, Utah.n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00676 ID. Hillers, J.K. 676 Polygonal weathering.n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00681 ID. Hillers, J.K. 681 Sland Park, Green River. Dinosaur National Monument. Uintah County, Utah. July 1871. (Stereoscopic view) #1:/Beaman E.O. Collection-Dinosaur National Monument/hjk00684 ID. Hillers, J.K. 684 Island Park, Green River. Dinosaur National Monument. Uintah County, Utah. July 1871 (Photo by E.O. Beaman) (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00685 ID. Hillers, J.K. 685 Kanab Canyon. Arizona or Utah? n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00687 ID. Hillers, J.K. 687 General view of Green River in Split Mountain Canyon from above (3000 feet) at entrance. Looking downstream. Dinosaur National Monument. Uintah County, Utah. July 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00688 ID. Hillers, J.K. 688 Kanab Canyon near junction with the Grand Canyon. Coconino County, Arizona. n.d. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00690 ID. Hillers, J.K. 690 Green River. Split Mountain Canyon. Not far from entrance to canyons. Dinosaur National Monument. Uintah County, Utah. July 10, 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00692 ID. Hillers, J.K. 692 Kanab Canyon, near mouth. Cliffs in the distance right and left are on the other side of the Colorado River. The boats are the Powell boats of the Second Expedition. 1872. "The water in 1872 was so high that it backed up this side canyon and the boats were rowed up to this position to find a quiet placeaway from the current of the river." Frederick S. Dellenbaugh. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00693 ID. Hillers, J.K. 693 Lava Falls, under Toroweap, Colorado River. Arizona.n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00698 ID. Hillers, J.K. 698 Boats on Green River in Split Mountain Canyon. Dinosaur National Monument. Uintah County, Utah. 1871. Negative broken. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00700 ID. Hillers, J.K. 700 Rock pinnacles in Split Mountain Canyon, Green River. Dinosaur National Monument. Uintah County, Utah. July 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00701 ID. Hillers, J.K. 701 Colob Country. The buttes in the right distance are the great buttes at entrance of the Mukuntuweap Branch of the Virgin River. Great Temple Butte (on Virgin River) in the distance. Southern Utah.n.d (Stereoscopic view) #1:/Beaman E.O. Collection-Dinosaur National Monument/hjk00702 ID. Hillers, J.K. 702 Rock pinnacles in Split Mountain Canyon, Green River. Dinosaur National Monument. Uintah County, Utah. July 1871. Photo by E.O. Beaman. (Near view of Hillers, J.K., 700) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00703 ID. Hillers, J.K. 703 Region south of Toquerville, and south of the Virgin River. Pine Valley Mountains in the distance. Washington County, Utah.n.d. (Stereoscopic view) #1:/Beaman E.O. Collection-Dinosaur National Monument/hjk00704 ID. Hillers, J.K. 704 Green River. Cabin at "Ft. Robidoux" about opposite the mouth of the Uintah River. Dodd's cabin, White River Valley. Figures from left to right are: Dellenbaugh looking through field glasses, Jack Hillerssitting down and pointing, Thompson on the arm of chair, Beaman standing in front of door, Clement Powellon his left, J.F. Steward, Andy Hattan, Captain Bishop near tree. Utah. 1871. Photo by E.O. Beaman. (Stereoscopic view) "Pardyn Dodd's Cabin 1871. Identified by the journals of F.M. Bishop and S.V. Jones. This has been erroneously termed Fort Robidoux in some of the Powell journals. It was built onthe site of the fort constructed sometime in the 1830's at the mouth of the White River. Photograph by E.O. Beaman, July, 1871." Second caption as shown in the following publication reference: Published opposite p. 177 in Utah State Historical Society. Utah Historical Quarterly, v. 15. 1947. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00706 ID. Hillers, J.K. 706 Colob Cliffs or Peaks. Southern Utah.n.d. (Forms stereoscopic view with Hillers, J.K. 706a) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00708 ID. Hillers, J.K. 708 Bowknot Bend, Labyrinth Canyon. Utah.n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00710 ID. Hillers, J.K. 710 Ruin opposite the mouth of the Dirty Devil - Fremont River. Utah.n.d. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00712 ID. Hillers, J.K. 712 Colob Country. Buttes of the Mukuntuweap Branch of the Virgin River in distance. On the horizon is shownthe Great Temple, or, as the Mormons call it, "Steamboat Rock," which is 7500 feet high. Springdale is just the other side of the square-topped buttes. Southern Utah.n.d. (Negative broken). (Stereoscopic view). #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00713 ID. Hillers, J.K. 713 Canyon of Desolation, Green River. Utah.n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00714 ID. Hillers, J.K. 714 Canyon of Desolation, Green River. Utah.n.d. (Negative broken). (Forms a stereoscopic view with photo no. 714a) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00716 ID. Hillers, J.K. 716 Canyon of Desolation, Green River. "Rigput fence" left foreground. Utah.n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00717 ID. Hillers, J.K. 717 Colob Country. Southern Utah.n.d. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00719 ID. Hillers, J.K. 719 Canyon of Desolation, Green River. Boats of the 1871 Expedition. Utah. (Negative broken). (Stereoscopic view) #1:/Grand Canyon National Park/hjk0071a ID. Hillers, J.K. 71a Grand Canyon National Park, Arizona. Marble Pinnacle in Kanab Canyon. #1:/Grand Canyon National Park/hjk0071b ID. Hillers, J.K. 71b Grand Canyon National Park, Arizona. Marble Pinnacle in Kanab Canyon. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00722 ID. Hillers, J.K. 722 Trinalcove, Labyrinth Canyon, Green River. Utah.n.d. (Forms a stereoscopic view with Hillers, J.K. 722a) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00723 ID. Hillers, J.K. 723 Trinalcove, Labyrinth Canyon, Green River. Utah.n.d. (Forms a stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00724 ID. Hillers, J.K. 724 Tantalus Creek Canyon, as seen from above. Utah.n.d. (stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00727 ID. Hillers, J.K. 727 Trinalcove Bend, Labyrinth Canyon, Green River. Utah.n.d. (Stereoscopic view) #1:/Beaman E.O. Collection-Dinosaur National Monument/hjk00728 ID. Hillers, J.K. 728 Green river at Stillwater Canyon. Utah.n.d. Photo by E.O. Beaman). (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00733 ID. Hillers, J.K. 733 The Butte of the Cross. Labyrinth Canyon, Green River. Utah.n.d. (Stereoscopic view). #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00734 ID. Hillers, J.K. 734 The Butte of the Cross. Labyrinth Canyon, Green River. Utah.n.d. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00735 ID. Hillers, J.K. 735 Glen Canyon, Colorado River.n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00736 ID. Hillers, J.K. 736 Labyrinth Canyon, Green River, Tump-in-kon-tu-weap. Utah.n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00738 ID. Hillers, J.K. 738 Colorado River pothole. Glen Canyon region.n.d. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00739 ID. Hillers, J.K. 739 View near Bonita Bend in Green River. Utah.n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00741 ID. Hillers, J.K. 741 Bonita Bend in Green River. Dividing point of Labyrinth and Stillwater Canyons. Utah.n.d. #1:/Canyonlands National Park/hjk00744 ID. Hillers, J.K. 744 Canyonlands National Park, Utah. Stillwater Canyon of the Green River, viewed from a point on the south rim about 1 mile above (west of) the confluence with the Colorado River. September 16, 1871. Second expedition of the U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Figure 67 (upper photo), U.S. Geological Survey Bulletin 1327. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00747 ID. Hillers, J.K. 747 Colorado River. Junction of Grand (now Colorado) and Green Rivers, just west of the junction. Utah.n.d. (No water shown in photo). (Negative broken). (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00749 ID. Hillers, J.K. 749 Green River in Canyon of Desolation. Utah.n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00752 ID. Hillers, J.K. 752 Low water in Green River, Canyon of Desolation. Utah.n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00753 ID. Hillers, J.K. 753 Colorado River in Cataract Canyon, Colorado River. Utah.n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00758 ID. Hillers, J.K. 758 Colorado River in Cataract Canyon. Utah. September 26, 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00759 ID. Hillers, J.K. 759 Side canyon in Cataract Canyon, Colorado River. Utah.n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00764 ID. Hillers, J.K. 764 Mille Crag Bend, foot of Cataract Canyon and beginning of Narrow Canyon, Colorado River. Utah.n.d. (Stereoscopic view). (Negative broken). #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00766 ID. Hillers, J.K. 766 Colorado River. Cliffs opposite the mouth of the Little Colorado River. Arizona.n.d. (Negative broken). (Stereoscopic view). #1:/Grand Canyon National Park/hjk00769 ID. Hillers, J.K. 769 Grand Canyon National Park, Arizona. Boats in the Colorado River near the upper end of the Grand Canyon. Photo by E.0. Beaman, 1872.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). #1:/Beaman E.O. Collection-Dinosaur National Monument/hjk00770 ID. Hillers, J.K. 770 Colorado River, Glen Canyon, Sentinel Rock. Mouth of Sentinel Creek, between the Crossing of the Fathersand the Paria, right bank. 1871. Photo by E.O. Beaman). (Stereoscopic view). #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00774 ID. Hillers, J.K. 774 Green River in Stillwater Canyon. Utah.n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00775 ID. Hillers, J.K. 775 Glen Canyon. Cliff near mouth of Fremont River, Colorado River. Utah.n.d. (Forms a stereoscopic view with Hillers, J.K. 775a) #1:/Fennemore J. Collection-Dinosaur National Monument/hjk00778 ID. Hillers, J.K. 778 Colorado River, on right bank a little below mouth of Fremont River. Repairing a boat which was left in 1871 at mouth of Fremont river. Left to right: W. Johnson, F.S. Dellenbaugh, and Jack Hillers. Utah. 1872. Photo by James Fennemore). (Stereoscopic view). Published as illustration no. 13 in Darrah, W.C. Powell of the Colorado. Princeton University Press, 1951. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00786 ID. Hillers, J.K. 786 Boulder Creek, Aquarius Plateau. Utah.n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00790 ID. Hillers, J.K. 790 Glen in Glen Canyon.n.d. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00795 ID. Hillers, J.K. 795 "An Obstruction," a boulder lodged between canyon walls, Tantalus Creek. Utah.n.d. (Stereoscopic view) #1:/Fennemore J. Collection-Dinosaur National Monument/hjk00796 ID. Hillers, J.K. 796 "Music Temple," a side ravine in Glen Canyon.n.d. Photo by James Fennemore). (Forms a stereoscopic view with Hillers, J.K. 796a) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00799 ID. Hillers, J.K. 799 Side ravine in Glen Canyon.n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00800 ID. Hillers, J.K. 800 Side ravine in Glen Canyon.n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00801 ID. Hillers, J.K. 801 Very old cedar tree. Utah.n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00803 ID. Hillers, J.K. 803 Looking out of a glen. Glen Canyon.n.d. (Negative broken). (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00805 ID. Hillers, J.K. 805 Tall trees near Big Boulder Creek, Aquarius Plateau. Utah.n.d. (Stereoscopic view) #1:/Fennemore J. Collection-Dinosaur National Monument/hjk00806 ID. Hillers, J.K. 806 Glen Canyon, Colorado River. 1872. Photo by James Fennemore). (Enlargement of left side of photo 806a). Published as illustration no. 10 in Darrah, W.C. Powell of the Colorado. Princeton University Press, 1951. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00807 ID. Hillers, J.K. 807 Aspen Lake, Aquarius Plateau. Utah. 1872. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00808 ID. Hillers, J.K. 808 High water in Glen Canyon, Colorado River. 1872. (Stereoscopic view) #1:/Thompson A.H. Collection-Dinosaur National Monument/hjk00809 ID. Hillers, J.K. 809 J.K. Hillers at work as photographer on the Aquarius Plateau in July 1875. Utah. (Stereoscopic view). Published as lower photo opposite p. 495 in Utah State Historical Society. Utah Historical Quarterly, v. 16 - 17. 1948 - 49. (Possibly by A.H. Thompson or G.K. Gilbert) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00812 ID. Hillers, J.K. 812 Massive wall in Glen Canyon, Colorado River. 1872. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00816 ID. Hillers, J.K. 816 Cave Lake, above Kanab.n.d. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00817 ID. Hillers, J.K. 817 Virgin River, East Fork, Parunuweap Canyon. Long Valley Branch? (Mouth of the Narrows) Utah.n.d. (Negative broken) #1:/Grand Canyon National Park/hjk00820 ID. Hillers, J.K. 820 Grand Canyon National Park, Arizona. Major Powell's armchair on a boat in Marble Canyon. August 1872.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00821 ID. Hillers, J.K. 821 Gorge between sheer rock cliffs. San Juan County, Utah.n.d. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00824 ID. Hillers, J.K. 824 Glen Canyon. Utah or Arizona.n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00825 ID. Hillers, J.K. 825 Winslow Creek, a branch of the Escalante River, Aquarius Plateau. Utah.n.d. (Forms a stereoscopic view with Hillers, J.K. 825a) #1:/Fennemore J. Collection-Dinosaur National Monument/hjk00827 ID. Hillers, J.K. 827 A side ravine in Glen Canyon, Colorado River.n.d. Photo by James Fennemore). (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00828 ID. Hillers, J.K. 828 Glen Canyon.n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00829 ID. Hillers, J.K. 829 Annus Glen, Winslow Creek. Garfield County, Utah.n.d. (Forms a stereoscopic view with Hillers, J.K. 829a) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00830 ID. Hillers, J.K. 830 Packtrain in San Francisco Mountain region. Shows character of the mountains on high plateau regions of the Colorado River. Arizona. 1885. (Forms a stereoscopic view with Hillers, J.K. 830a). #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00831 ID. Hillers, J.K. 831 Green River in Stillwater Canyon. Utah.n.d. (Forms a stereoscopic view with Hillers, J.K. 831a) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00833 ID. Hillers, J.K. 833 Colorado River in Glen Canyon. 1872. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00835 ID. Hillers, J.K. 835 Glen Canyon, Colorado River.n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk0083a ID. Hillers, J.K. 83a Green River, Gate of Lodore, just within the entrance. Dinosaur National Monument. Moffat County, Colorado.n.d. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00840 ID. Hillers, J.K. 840 One of the glens in Glen Canyon, Colorado River.n.d. (Negative cracked). (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00841 ID. Hillers, J.K. 841 Hillers' white mule.n.d. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00842 ID. Hillers, J.K. 842 Navajo Mountain from Aquarius Plateau. Utah.n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00843 ID. Hillers, J.K. 843 Temple Creek, a branch of Escalante River, Aquarius Plateau. Utah.n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00844 ID. Hillers, J.K. 844 Temple Creek, Aquarius Plateau. Utah.n.d. (Forms a stereoscopic view with Hillers, J.K. 844a) #1:/Grand Canyon National Park/hjk00845 ID. Hillers, J.K. 845 Grand Canyon National Park, Arizona. Marble Canyon. 1872.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Stereoscopic view. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00847 ID. Hillers, J.K. 847 On Water Pocket Creek. Turtle-back sandstone. Utah.n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00848 ID. Hillers, J.K. 848 Water Pocket Creek. Utah.n.d. (Forms stereoscopic view with Hillers, J.K. 848a) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00850 ID. Hillers, J.K. 850 Two boats in Marble Canyon, Colorado River. Major Powell's armchair in on one of the boats. Grand Canyon National Park. Coconino County, Arizona. 1872. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00852 ID. Hillers, J.K. 852 Water Pocket Creek. "A Puzzle." Utah.n.d. (Forms stereoscopic view with Hillers, J.K. 852a) #1:/Grand Canyon National Park/hjk00854 ID. Hillers, J.K. 854 and 854a Grand Canyon National Park, Arizona. Marble Canyon. August 1872.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Photos hjk00854 and hjk0854a form a stereoscopic view. #1:/Grand Canyon National Park/hjk00856 ID. Hillers, J.K. 856 Grand Canyon National Park, Arizona. Major Powell's famous armchair boat on the Colorado River. August 22, 1872.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Stereoscopic view. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00857 ID. Hillers, J.K. 857 Glen Canyon, Colorado River.n.d. (Stereoscopic view) #1:/Grand Canyon National Park/hjk00858 ID. Hillers, J.K. 858 Grand Canyon National Park, Arizona. Marble Canyon. August 1872.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Photos hjk00858 and hjk0858a form a stereoscopic view. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00859 ID. Hillers, J.K. 859 Tantalus Creek, mouth of Tantalus Canyon, Aquarius Plateau. Utah.n.d. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00861 ID. Hillers, J.K. 861 "Minnie's Falls," Tantalus Creek. Utah.n.d. (Stereoscopic view) #1:/Grand Canyon National Park/hjk00863 ID. Hillers, J.K. 863 Grand Canyon National Park, Arizona. Grand Canyon, looking up the river, just below the mouth of the Little Colorado River. August 1872.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Photos hjk00863 and hjk0863a form a stereoscopic view. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00864 ID. Hillers, J.K. 864 Tantalus Creek in the shadows, Aquarius Plateau. Utah.n.d. #1:/Grand Canyon National Park/hjk00866 ID. Hillers, J.K. 866 Grand Canyon National Park, Arizona. Grand Canyon. August 28, 1872.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). #1:/Grand Canyon National Park/hjk00872 ID. Hillers, J.K. 872 Grand Canyon National Park, Arizona. First Granite Gorge. September 1872. U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Stereoscopic view. Negative cracked. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00873 ID. Hillers, J.K. 873 Sandstone boulders in Tantalus Creek, Aquarius Plateau. Utah.n.d. (Stereoscopic view) #1:/Grand Canyon National Park/hjk00875 ID. Hillers, J.K. 875 Grand Canyon National Park, Arizona. Granite of the first gorge. September 1872.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Stereoscopic view. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00876 ID. Hillers, J.K. 876 Grand Canyon, not far above mouth of the Kanab. Arizona.n.d. (Stereoscopic view) #1:/Grand Canyon National Park/hjk00885 ID. Hillers, J.K. 885 Grand Canyon National Park, Arizona. Boats near the mouth of the Little Colorado River. 1872.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Photos hjk00885 and hjk0885a form a stereoscopic view. #1:/Grand Canyon National Park/hjk00886 ID. Hillers, J.K. 886 Grand Canyon National Park, Arizona. Andy Hattan by the boats. 1872. U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Stereoscopic view. #1:/Canyon de Chelly National Monument/hjk0088a ID. Hillers, J.K. 88a Canyon de Chelly National Monument, Arizona. Captains of the Canyon. #1:/Canyon de Chelly National Monument/hjk0088b ID. Hillers, J.K. 88b Canyon de Chelly National Monument, Arizona. Captains of the Canyon. Negative cracked) #1:/Grand Canyon National Park/hjk00891 ID. Hillers, J.K. 891 Grand Canyon National Park, Arizona. Just above the mouth of Kanab Canyon. September 1872.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Photos hjk00891 and hjk0891a form a stereoscopic view. #1:/Grand Canyon National Park/hjk00892 ID. Hillers, J.K. 892 Grand Canyon National Park, Arizona. Tapeats Creek. September 1872.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Stereoscopic view. Negative cracked. #1:/Grand Canyon National Park/hjk00893 ID. Hillers, J.K. 893 Grand Canyon National Park, Arizona. Outlet of Surprise Valley 10 miles above the mouth of Kanab. September 7, 1872.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Photos hjk00893 and hjk0893a form a stereoscopic view. #1:/Grand Canyon National Park/hjk00894 ID. Hillers, J.K. 894 Grand Canyon National Park, Arizona. Grand Canyon at the mouth of the Little Colorado River. August 23, 1872.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Photos hjk00894 and hjk0894a form a stereoscopic view. #1:/Grand Canyon National Park/hjk00896 ID. Hillers, J.K. 896 Grand Canyon National Park, Arizona. Across the south foot of Toroweap. U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Stereoscopic view. #1:/Grand Canyon National Park/hjk00897 ID. Hillers, J.K. 897 Grand Canyon National Park, Arizona. West from the foot of Toroweap.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Photos hjk00897 and hjk0897a form a stereoscopic view. #1:/Grand Canyon National Park/hjk00899 ID. Hillers, J.K. 899 Grand Canyon National Park, Arizona. Muav Canyon.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Photos hjk00899 and hjk0899a form a stereoscopic view. #1:/Canyon de Chelly National Monument/hjk0089a ID. Hillers, J.K. 89a Canyon de Chelly National Monument, Arizona. Captains of the Canyon. #1:/Canyon de Chelly National Monument/hjk0089b ID. Hillers, J.K. 89b Canyon de Chelly National Monument, Arizona. Captains of the Canyon. #1:/Grand Canyon National Park/hjk00901 ID. Hillers, J.K. 901 Grand Canyon National Park, Arizona. Muav side canyon.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Photos hjk00901 and hjk0901a form a stereoscopic. #1:/Grand Canyon National Park/hjk00902 ID. Hillers, J.K. 902 Grand Canyon National Park, Arizona. Grand Canyon near Toroweap (or Muav). U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Photos hjk00902 and hjk0902a form a stereoscopic view. #1:/Grand Canyon National Park/hjk00903 ID. Hillers, J.K. 903 Grand Canyon National Park, Arizona. Grand Canyon near Toroweap (or Muav). U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). #1:/Grand Canyon National Park/hjk00904 ID. Hillers, J.K. 904 Grand Canyon National Park, Arizona. Grand Canyon near Toroweap (or Muav). U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). #1:/Grand Canyon National Park/hjk00905 ID. Hillers, J.K. 905 Grand Canyon National Park, Arizona. The Cinder Cone near the foot of Toroweap.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Stereoscopic view. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00947 ID. Hillers, J.K. 947 Grand Canyon. Arizona.n.d. (Same area as Hillers, J.K. 904) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00953 ID. Hillers, J.K. 953 Ruins.n.d. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00954 ID. Hillers, J.K. 954 Bullion Canyon. Utah.n.d. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00955 ID. Hillers, J.K. 955 Lone Star Geyser in action. Yellowstone National Park. Wyoming.n.d. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00956 ID. Hillers, J.K. 956 A geyser cone. Yellowstone National Park. Wyoming.n.d. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00957 ID. Hillers, J.K. 957 Castle Geyser, beginning of action. Yellowstone National Park. Wyoming.n.d. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00958 ID. Hillers, J.K. 958 Castle Geyser in eruption. Yellowstone National Park. Wyoming.n.d. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00959 ID. Hillers, J.K. 959 New River. West Virginia. ca. 1894. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00960 ID. Hillers, J.K. 960 Mamelon foothills? n.d. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00963 ID. Hillers, J.K. 963 Pine Creek, Bullion Canyon. Utah.n.d. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00964 ID. Hillers, J.K. 964 Hot Springs. Yellowstone National Park. Wyoming.n.d. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00965 ID. Hillers, J.K. 965 Pilling's Cascade, Bullion Canyon. Utah.n.d. (Also called Renshawe's Cascade). (A portion of photo no. 110a) #1:/Beaman E.O. Collection-Dinosaur National Monument/hjk00967 ID. Hillers, J.K. 967 Canyons of Green River. Left bank of Green River. Boats of Powell's Second Expedition, before the startof the journey. The boats are "Canonita," and "Emma Dean," and "Nellie Powell." Just below the Union Pacific bridge at Green River station. The famous eleven of the party were Andy Hattan, W. Clement Powell, S.V. Jones, Major John W. Powell, Frederic S. Dellenbaugh, Professor Almon Harris Thompson, John F. Steward, F.M. Bishop, Frank C.A. Richardson, Jack Hillers and E.O. Beaman. Sweetwater County, Wyoming. 1871. (Stereoscopic view). (Similar to J.K. Hillers nos. 506 and 506a, photo by E.O. Beaman) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00968 ID. Hillers, J.K. 968 Canyons of Green River. Green River above station. ca. 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00969 ID. Hillers, J.K. 969 Canyons of Green River. Fish Buttes near Green River City. Sweetwater County, Wyoming. ca. 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00970 ID. Hillers, J.K. 970 Canyons of Green River. Badlands above Camp No.1. Sweetwater County, Wyoming. ca. 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00971 ID. Hillers, J.K. 971 Canyons of Green River. Synclinal Gorge. ca. 1871. (Stereoscopic view) #1:/Beaman E.O. Collection-Dinosaur National Monument/hjk00972 ID. Hillers, J.K. 972 Camp at Flaming Gorge. Jack Hillers sewing in Red Canyon Park, Green River. Daggett County, Utah. 1871. (Stereoscopic view). (Same as J.K. Hillers no. 518, photo by E.O. Beaman) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00973 ID. Hillers, J.K. 973 Canyons of Green River. Chimney Rock on the Green River. Horseshoe Canyon, looking downstream. Wall 1,300 feet high. Daggett County, Utah. ca. 1871. (Stereoscopic view). Photo same as J.K. Hillers 517) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00974 ID. Hillers, J.K. 974 Canyons of Green River. Green River in Horseshoe Canyon, looking upstream. Wall 1,300 feet high. Daggett County, Utah. ca. 1871. (Stereoscopic view). Photo same as J.K. Hillers no. 521) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00975 ID. Hillers, J.K. 975 Canyons of Green River. Kingfisher Canyon, looking downstream. Wall 900 feet high. Green River, Beehive Point on middle right. Daggett County, Utah. ca. 1871. (Stereoscopic view). Photo similar to J.K. Hillers no. 527) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00976 ID. Hillers, J.K. 976 Canyons of Green River. Beehive Point in Kingfisher Canyon. Daggett County, Utah. ca. 1871. (Stereoscopic view). Photo similar to J.K. Hillers 522) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00977 ID. Hillers, J.K. 977 Canyons of Green River. Kingfisher Park. Daggett County, Utah. ca. 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00978 ID. Hillers, J.K. 978 Canyons of Green River. Beehive Crag. Daggett County, Utah. ca. 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00979 ID. Hillers, J.K. 979 Canyons of Green River. Red Canyon three miles below Beehive Point, looking upstream. Wall 1,400 feet high. Daggett County, Utah. ca. 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00980 ID. Hillers, J.K. 980 Canyons of Green River. Francis Creek in Red Canyon. Daggett County, Utah. ca. 1871. (Stereoscopic view) #1:/Beaman E.O. Collection-Dinosaur National Monument/hjk00981 ID. Hillers, J.K. 981 Canyons of Green River. Ashley Falls in Red Canyon. Daggett County, Utah. ca. 1871. (Stereoscopic view). (Similar to J.K. Hillers no. 481, photo by E.O. Beaman) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00982 ID. Hillers, J.K. 982 Canyons of Green River. Canyon of Desolation, wall across river. Uintah and Carbon Counties, Utah. ca. 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00983 ID. Hillers, J.K. 983 Canyons of Green River. Sumner's Amphitheater, in Canyon of Desolation. Uintah and Carbon Counties, Utah. ca. 1871. (Stereoscopic view) Photo similar to J.K. Hillers no. 708) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00984 ID. Hillers, J.K. 984 Canyons of Green River. Sumner's Amphitheater in Canyon of Desolation. Uintah and Carbon counties, Utah. ca. 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00985 ID. Hillers, J.K. 985 Canyons of Green River. Lighthouse Rock in Canon of Desolation. Uintah and Carbon Counties, Utah. ca. 1871. (Stereoscopic view). Photo same as J.K. Hillers no. 713) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00986 ID. Hillers, J.K. 986 River view from Camp No. 38 in Canyon of Desolation. Uintah and Carbon Counties, Utah. ca. 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00987 ID. Hillers, J.K. 987 Rapids in Canyon of Desolation. Uintah and Carbon Counties, Utah. ca. 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00988 ID. Hillers, J.K. 988 Canyons of Green River. Falls at Camp No. 41 in Canyon of Desolation. Uintah and Carbon Counties, Utah.ca. 1871. (Stereoscopic view). Photo similar to J.K. Hillers no. 716) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00989 ID. Hillers, J.K. 989 Canyons of Green River. Canyon of Desolation. Wall 2,500 feet high. Uintah and Carbon Counties, Utah. ca. 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00990 ID. Hillers, J.K. 990 Canyons of Green River. Chandler's Falls in Canyon of Desolation. Boats of the 1871 Expedition. Uintahand Carbon Counties, Utah. ca. 1871. (Stereoscopic view). Photo same as J.K. Hillers no. 719. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00991 ID. Hillers, J.K. 991 Canyons of Green River. Eagle Cliff in Canyon of Desolation. Uintah and Carbon Counties, Utah. ca. 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00992 ID. Hillers, J.K. 992 Canyons of Green River. Cathedral Butte, Blue Cliffs. ca. 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00993 ID. Hillers, J.K. 993 Canyons of Green River. Trinalcove, Labyrinth Canyon. Grand and Emery Counties, Utah. ca. 1871. (Stereoscopic view) #1:/Beaman E.O. Collection-Dinosaur National Monument/hjk00994 ID. Hillers, J.K. 994 Canyons of Green River. River view in Labyrinth Canyon. Grand and Emery Counties, Utah. ca. 1871. (Stereoscopic view). (Similar to J.K. Hillers no. 728, photo by E.O. Beaman) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00995 ID. Hillers, J.K. 995 Canyons of Green River. River view in Labyrinth Canyon. Grand and Emery Counties, Utah. ca. 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00996 ID. Hillers, J.K. 996 Canyons of Green River. River view in Labyrinth Canyon. Grand and Emery Counties, Utah. ca. 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00997 ID. Hillers, J.K. 997 Canyons of Green River. Tump-in-kon-tu-weap. Labyrinth Canyon. Grand and Emery Counties, Utah. ca. 1871. (Stereoscopic view). Photo similar to J.K. Hillers no. 736) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00998 ID. Hillers, J.K. 998 Canyons of Green River. Tump-in-kon-tu-weap. Labyrinth Canyon. Grand and Emery Counties, Utah. ca. 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk00999 ID. Hillers, J.K. 999 Canyons of Green River. Dellenbaugh Butte, near the mouth of San Rafael. Labyrinth Canyon. Grand and Emery Counties, Utah. ca. 1871. (Stereoscopic view). Photo same as J.K. Hillers no. 585) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk01000 ID. Hillers, J.K. 1000 Canyons of Green River. The Butte of the Cross. Toum-pen Tou-weap, (Rock Land. (Stillwater Canyon. Wayne and San Juan Counties, Utah. ca. 1871. (Stereoscopic view). Photo similar to J.K. Hillers no.733) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk01001 ID. Hillers, J.K. 1001 Canyons of Green River. Toum-pen Tou-weap, (Rock Land. (Stillwater Canyon. Wayne and San Juan Counties, Utah. ca. 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk01002 ID. Hillers, J.K. 1002 Canyons of Green River. Bonita Bend in Stillwater Canyon. It is here that Stillwater Canyon begins and Labyrinth Canyon ends. Wayne and San Juan Counties, Utah. ca. 1871. (Stereoscopic view). Photo similar to J.K. Hillers no. 446) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk01003 ID. Hillers, J.K. 1003 "Billy Keans" Hopi trader and interpreter. 1875. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk01004 ID. Hillers, J.K. 1004 Canyons of Green River. Stillwater Canyon from Junction Cliff. Wayne and San Juan Counties, Utah. ca. 1871. (Stereoscopic view). Photo similar to J.K. Hillers nos. 744 and 744a) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk01005 ID. Hillers, J.K. 1005 Canyons of Green River. Colorado River. Junction of Grand (now Colorado) and Green Rivers, just west of the junction near Stillwater Canyon. Sin-an-av Tou-weap, (God Land). Wayne and San Juan Counties, Utah. ca. 1871. (Stereoscopic view). Photo similar to J.K. Hillers no. 747) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk01006 ID. Hillers, J.K. 1006 Canyons of Green River. Sin-an-av Toup-weap (God Land. (Stillwater Canyon. Wayne and San Juan Counties, Utah. ca. 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk01007 ID. Hillers, J.K. 1007 Canyons of Green River. Near Stillwater Canyon. Sin-an-av Tou-weap (God Land). Wayne and San Juan Counties, Utah. ca. 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk01008 ID. Hillers, J.K. 1008 Canyons of Green River. Near Stillwater Canyon. Sin-an-av Tou-weap (God Land). Wayne and San JuanCounties, Utah. ca. 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk01009 ID. Hillers, J.K. 1009 Canyons of Green River. Cataract Canyon. Looking down from cliff near junction of Grand and Green Rivers. San Juan and Garfield Counties, Utah. ca. 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk01010 ID. Hillers, J.K. 1010 Canyons of the Colorado River of the west. Cataract Canyon. San Juan and Garfield Counties, Utah. ca. 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk01011 ID. Hillers, J.K. 1011 Canyons of the Colorado River of the west. Cataract Canyon. San juan and Garfield Counties, Utah. ca. 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk01012 ID. Hillers, J.K. 1012 Canyons of the Colorado River of the west. Colorado River in Cataract Canyon. A rapid in Cataract Canyon. San Juan and Garfield Counties, Utah. ca. 1871. (Stereoscopic view). Photo same as J.K.hillers no. 753) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk01013 ID. Hillers, J.K. 1013 Canyons of the Colorado River of the west. Gorge between sheer rock cliffs in Cataract Canyon. San Juan County, Utah. ca. 1871. (Stereoscopic view). Photo same as J.K. Hillers no. 821) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk01014 ID. Hillers, J.K. 1014 Canyons of the Colorado River of the west. Colorado River in Cataract Canyon. San Juan and Garfield Counties, Utah. ca. 1871. (Stereoscopic view). Photo same as J.K. Hillers no. 758) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk01015 ID. Hillers, J.K. 1015 Canyons of the Colorado River of the west. Cataract Canyon. San Juan and Garfield Counties, Utah. ca. 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk01016 ID. Hillers, J.K. 1016 Canyons of the Colorado River of the west. Mille Crag Bend, foot of Cataract Canyon and beginning of Narrow Canyon of the Colorado River. San Juan and Garfield Counties, Utah. ca. 1871. (Stereoscopic view). Photo same as J.K. Hillers 764) #1:/Beaman E.O. Collection-Dinosaur National Monument/hjk01017 ID. Hillers, J.K. 1017 Canyons of the Colorado River of the west. Colorado River in Glen Canyon. Sentinel Rock. Mount ofSentinel Creek, between the Crossing of the Fathers and the Paria, right bank. Sentinel Rock is 450 feet high. Utah or Arizona. ca. 1871. (Stereoscopic view). (Similar to J.K. Hillers no. 770, photo by E.O. Beaman) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk01018 ID. Hillers, J.K. 1018 Ute Indians. Major Powell in conference. ca. 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk01019 ID. Hillers, J.K. 1019 Major Powell talking to a Paiute Indian during northern Arizona survey. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk01020 ID. Hillers, J.K. 1020 John F. Steward in Glen Canyon, Colorado River. Shown with field equipment including gun, pick, map caseand canteen. Kane County, Utah. 1872. (Same as J.K. Hillers no. 569) #1:/Zion National Park/hjk01021 ID. Hillers, J.K. 1021 Zion National Park, Utah. Virgin River Valley. Probably the southeast face of the Towers of the Virgin, including the West Temple, the Three Marys and Meridian Tower. 1872 or later.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). #1:/Grand Canyon National Park/hjk01022 ID. Hillers, J.K. 1022 Grand Canyon National Park, Arizona. Inner gorge of the Grand Canyon. 1872 or later.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). #1:/Zion National Park/hjk01023 ID. Hillers, J.K. 1023 Zion National Park, Utah. South face of the west and center peaks of the Three Patriarchs. 1872 or later.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Photo is round. #1:/Zion National Park/hjk01024 ID. Hillers, J.K. 1024 Zion National Park, Utah. South face of the east peak of the Three Patriarchs. Photo probably by J.K. Hillers, 1872 or later.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Photo is round. #1:/Charleston, South Carolina, August 31, 1886/hjk01025 ID. Hillers, J.K. 1025 Charleston, South Carolina, Earthquake August 31, 1886. Double exposure of the Granite Works. Dominant image is a yard of granite monuments, some of which have been toppled by the earthquake. August 31, 1886(?) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk01028 ID. Hillers, J.K. 1028 Lava Falls, Colorado River, Grand Canyon. Arizona. 1872. (An enlargement of a portion of J.K. Hillers 967a, a composite) Hillers, J.K. 1027 View in Grand Canyon. Arizona.n.d. (an enlargement of a portion of J.K. Hillers 967a, a composite) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk01030 ID. Hillers, J.K. 1030 Looking into Marble Canyon of the Colorado River. Shinumo Altar in distance. Arizona.n.d. (an enlargement of a portion of J.K. Hillers 967a, a composite) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk01031 ID. Hillers, J.K. 1031 The Grand Canyon. Grand Canyon National Park. Arizona. August 26, 1872. (An enlargement of a portion of J.K. Hillers 967a, a composite) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk01033 ID. Hillers, J.K. 1033 General view of the Grand Canyon. Arizona.n.d. (An enlargement of a portion of J.K. Hillers 967a, a composite) #1:/Beaman E.O. Collection-Dinosaur National Monument/hjk01034 ID. Hillers, J.K. 1034 The famous Powell armchair in Marble Canyon. Grand Canyon National Park. Coconino County, Arizona. August 20, 1872. Photo by E.O. Beaman; an enlargement of a portion of J.K. Hillers 967a, a composite) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk01035 ID. Hillers, J.K. 1035 Kaibab Plateau. Looking north to Vermilion Cliffs. Grand Canyon of the Colorado River. Arizona.n.d. (An enlargement of a portion of J.K. Hillers 967a, a composite) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk01036 ID. Hillers, J.K. 1036 View in Grand Canyon; man is sitting on edge of rock in upper right. Arizona.n.d. (An enlargement ofa portion of J.K. Hillers 967a, a composite) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk01037 ID. Hillers, J.K. 1037 No caption. (An enlargement of a portion of J.K. Hillers 967a, a composite) #1:/Grand Canyon National Park/hjk01038 ID. Hillers, J.K. 1038 Grand Canyon National Park, Arizona. Major John Wesley Powell's boat the "Emma Dean" moored on a bank of the Colorado River in the Grand Canyon. 1871 or 1872.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk01039 ID. Hillers, J.K. 1039 The Powell-Ingalls Special Commission meeting with Southern Paiutes near St. George. Standing figure atfar left is Major John Wesley Powell - note empty shirt sleeve. Washington County, Utah. September 1873. Photo from Smithsonian Institution: BAE neg. no. 1662 - A, Paiute). Published onpp. 12 - 13 in U.S. Geological Survey. John Wesley Powell: Soldier, Explorer, Scientist. 1974. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk01040 ID. Hillers, J.K. 1040 Major John Wesley Powell in Indian dress and Tau-ruv, a member of Paiute Indian Tribe. Photo taken in Uintah Valley, eastern slope of the Wasatch Mountains. Utah.n.d. Photo courtesy Smithsonian Institution, Bureau of American Ethnology) #1:/Hillers J.K. Collection/hjk0110a ID. Hillers, J.K. 110a Pilling's Cascade (also called Renshawe's Cascade), Bullion Canyon. Utah.n.d. #1:/Yellowstone National Park/hjk0157a ID. Hillers, J.K. 157a Yellowstone National Park, Wyoming. Canyon walls of the Yellowstone River. #1:/Yellowstone National Park/hjk0157b ID. Hillers, J.K. 157b Yellowstone National Park, Wyoming. Canyon walls of the Yellowstone River. #1:/Yellowstone National Park/hjk0159a ID. Hillers, J.K. 159a Yellowstone National Park, Wyoming. Looking down the Canyon of the Yellowstone River from the brink of the Lower Falls. #1:/Yellowstone National Park/hjk0159b ID. Hillers, J.K. 159b Yellowstone National Park, Wyoming. Looking down the Canyon of the Yellowstone River from the brink of the Lower Falls. #1:/Hillers J.K. Collection/hjk0215a ID. Hillers, J.K. 215a View up New River below Cotton Hill. West Virginia. ca. 1894. (Reduction of part of Hillers, J.K. 215) #1:/Hillers J.K. Collection/hjk0431a ID. Hillers, J.K. 431a Grand Canyon, looking east from foot of Toroweap. Arizona.n.d. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk0500a ID. Hillers, J.K. 500a Canyon of Lodore, Green River. Dinosaur National Monument. Moffat County, Colorado. June 1871. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk0505a ID. Hillers, J.K. 505a James C. Pilling in the Canyon of Lodore, Green River, just within the entrance. Dinosaur National Monument. Moffat County, Colorado. June 1871. (Forms a stereoscopic view with Hillers, J.K., 505a) #1:/Beaman E.O. Collection-Dinosaur National Monument/hjk0506a ID. Hillers, J.K. 506a (Stereoscopic pair). Left bank of Green River. Boats of Powell's Second Expedition, before the start of the journey. The boats are "Canonita," "Emma Dean," and "Nellie Powell." Just below the Union Pacific Railroad bridgeat Green River Station. The famous eleven of the Powell party were Andy Hattan, W. Clement Powell, S.V. Jones, Major John W. Powell, Frederick S. Dellenbaugh, Professor Almon Harris Thompson, John F. Steward, F.M. Bishop, Frank C.A. Richardson, Jack Hillers, and E.O. Beaman. Sweetwater County, Wyoming. 1871. (Photo by E.O. Beaman) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk0511a ID. Hillers, J.K. 511a Colorado River. Grand Canyon, near foot of Toroweap, looking east. Arizona. n.d. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk0515a ID. Hillers, J.K. 515a Lava Falls, Colorado River, Grand Canyon. Arizona. 1872.). Forms a stereoscopic view with Hillers, J.K.515b) Published opposite p. 69 in Utah State Historical Society. Utah Historical Quarterly, v. 15.1947. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk0515b ID. Hillers, J.K. 515b Lava Falls, Colorado River, Grand Canyon. Arizona. 1872. Published as illustration no. 8 in Darrah,W.C. Powell of the Colorado. Princeton University Press, 1951. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk0517a ID. Hillers, J.K. 517a Chimney Rock on the Green River. 1871. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk0532a ID. Hillers, J.K. 532a Virgin River, Parunuweap Branch, Long Valley Branch, East Branch. Utah.n.d. (Forms astereoscopic view with Hillers, J.K. 532) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk0571a ID. Hillers, J.K. 571a View across Green River in Canyon of Lodore. Dinosaur National Monument. Moffat County, Colorado. June 1871). Negative cracked. (Forms a stereoscopic view with Hillers, J.K., 571a) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk0580a ID. Hillers, J.K. 580a Disaster Rapids in Canyon of Lodore, Green River. Dinosaur National Monument. Moffat County, Colorado. 1871. (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk0580b ID. Hillers, J.K. 580b Disaster Rapids in Canyon of Lodore, Green River. Dinosaur National Monument. Moffat County, Colorado. 1871). Stereoscopic view) #1:/Zion National Park/hjk0586a ID. Hillers, J.K. 586a Zion National Park, Utah. Eagle Crag, Virgin River, west fork in the Mukuntuweap Branch, Little Zion Valley.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Forms a stereoscopic view with photo hjk00586. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk0590a ID. Hillers, J.K. 590a Some of Powell's party in boats in Canyon of Lodore, Green River. Dinosaur National Monument Moffat County, Colorado. 1871. Forms stereoscopic view with Hillers, J.K., 590a. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk0600a ID. Hillers, J.K. 600a Echo Park from upper end. Yampa River in foreground coming from the left. Green River enters from the right. Dinosaur National Monument. Moffat County, Colorado.n.d. Forms stereoscopic view with photo 600. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk0608a ID. Hillers, J.K. 608a On the top of the country immediately at the junction of Grand (now Colorado) and Green Rivers, west side. Utah. September 17, 1871. (Enlargement of right portion of Hillers, J.K. 608) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk0623a ID. Hillers, J.K. 623a Dangerous water of Lava Falls, Colorado River, Grand Canyon. Arizona.n.d. Forms a stereoscopic view with Hillers, J.K. 623. #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk0638a ID. Hillers, J.K. 638a Kanab Canyon. Arizona or Utah? n.d. (Enlargement of left side of Hillers #638) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk0657a ID. Hillers, J.K. 657a Green River in Stillwater Canyon. Utah.n.d. (Forms a stereoscopic view with Hillers, J.K. 657) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk0706a ID. Hillers, J.K. 706a Colob Cliffs or Peaks. Southern Utah.n.d. (Forms stereoscopic view with Hillers, J.K. 706) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk0714a ID. Hillers, J.K. 714a Canyon of Desolation, Green River. Utah.n.d. (Negative broken). (Forms a stereoscopic view with photo no. 714a) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk0722a ID. Hillers, J.K. 722a Trinalcove, Labyrinth Canyon, Green River. Utah.n.d. (Forms a stereoscopic view with Hillers, J.K. 722) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk0775a ID. Hillers, J.K. 775a Glen Canyon. Cliff near mouth of Fremont River, Colorado River. Utah.n.d. Forms a stereoscopic view with Hillers, J.K. 775. #1:/Fennemore J. Collection-Dinosaur National Monument/hjk0796a ID. Hillers, J.K. 796a "Music Temple," a side ravine in Glen Canyon.n.d. Photo by James Fennemore). (Forms a stereoscopic view with Hillers, J.K. 796) #1:/Fennemore J. Collection-Dinosaur National Monument/hjk0806a ID. Hillers, J.K. 806a Glen Canyon, Colorado River. 1872. Photo by James Fennemore). (Stereoscopic view) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk0825a ID. Hillers, J.K. 825a Winslow Creek, a branch of the Escalante River, Aquarius Plateau. Utah.n.d. (Forms a stereoscopic view with Hillers, J.K. 825) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk0829a ID. Hillers, J.K. 829a Annus Glen, Winslow Creek. Garfield County, Utah.n.d. (Forms a stereoscopic view with Hillers, J.K. 829) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk0830a ID. Hillers, J.K. 830a Packtrain in San Francisco Mountain region. Shows character of the mountains on high plateau regions of the Colorado River. Arizona. 1885. (Forms a stereoscopic view with Hillers, J.K. 830). #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk0831a ID. Hillers, J.K. 831a Green River in Stillwater Canyon. Utah.n.d. (Forms a stereoscopic view with Hillers, J.K. 831) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk0844a ID. Hillers, J.K. 844a Temple Creek, Aquarius Plateau. Utah.n.d. (Forms a stereoscopic view with Hillers, J.K. 844a) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk0848a ID. Hillers, J.K. 848a Water Pocket Creek. Utah.n.d. (forms stereoscopic view with Hillers, J.K. 848) #1:/Hillers J.K. Collection-Dinosaur National Monument/hjk0852a ID. Hillers, J.K. 852a Water Pocket Creek. "A Puzzle." Utah.n.d. (Forms stereoscopic view with Hillers, J.K. 852) #1:/Grand Canyon National Park/hjk0854a ID. Hillers, J.K. 854a Grand Canyon National Park, Arizona. Marble Canyon. August 1872.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Photos hjk00854 and hjk0854a form a stereoscopic view. #1:/Grand Canyon National Park/hjk0858a ID. Hillers, J.K. 858a Grand Canyon National Park, Arizona. Marble Canyon. August 1872.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Photos hjk00858 and hjk0858a form a stereoscopic view. #1:/Grand Canyon National Park/hjk0863a ID. Hillers, J.K. 863a Grand Canyon National Park, Arizona. Grand Canyon, looking up the river, just below the mouth of the Little Colorado River. August 1872.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Photos hjk00863 and hjk0863a form a stereoscopic view. #1:/Grand Canyon National Park/hjk0871a ID. Hillers, J.K. 871a Grand Canyon National Park, Arizona. Repairing a boat at First Granite Gorge. September 1872.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Photos hjk0871a and hjk0871b form a stereoscopic view. #1:/Grand Canyon National Park/hjk0871b ID. Hillers, J.K. 871b Grand Canyon National Park, Arizona. Repairing a boat at First Granite Gorge. September 1872.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Photos hjk0871a and hjk0871b form a stereoscopic view. #1:/Grand Canyon National Park/hjk0879a ID. Hillers, J.K. 879a Grand Canyon National Park, Arizona. Grand Canyon near the Little Colorado River. Almon H. Thompson in the foreground. 1872.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Photos hjk0879a and hjk0879b form a stereoscopic view. #1:/Grand Canyon National Park/hjk0879b ID. Hillers, J.K. 879b Grand Canyon National Park, Arizona. Almon H. Thompson, who was in charge of topographical work on Powell's second expedition, was photographed looking upstream from the left bank a short distance below Fossil Canyon at the head of the Middle Granite Gorge, 202.7 kilometers below Lees Ferry. The Lower and Middle Cambrian Tapeats Sandstone forms a shallow inner gorge here. There is no observable vegetation on the pile of boulders in the foreground. Altitude 619 meters. 1872.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Figure 55-A, U.S. Geological Survey Professional Paper 1132. #1:/Grand Canyon National Park/hjk0885a ID. Hillers, J.K. 885a Grand Canyon National Park, Arizona. Boats near the mouth of the Little Colorado River. 1872.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Photos hjk00885 and hjk0885a form a stereoscopic view. #1:/Grand Canyon National Park/hjk0891a ID. Hillers, J.K. 891a Grand Canyon National Park, Arizona. Just above the mouth of Kanab Canyon. September 1872.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Photos hjk00891 and hjk0891a form a stereoscopic view. #1:/Grand Canyon National Park/hjk0893a ID. Hillers, J.K. 893a Grand Canyon National Park, Arizona. Outlet of Surprise Valley 10 miles above the mouth of Kanab. September 7, 1872.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Photos hjk00893 and hjk0893a form a stereoscopic view. #1:/Grand Canyon National Park/hjk0894a ID. Hillers, J.K. 894a Grand Canyon National Park, Arizona. Grand Canyon at the mouth of the Little Colorado River. August 23, 1872.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Photos hjk00894 and hjk0894a form a stereoscopic view. #1:/Grand Canyon National Park/hjk0897a ID. Hillers, J.K. 897a Grand Canyon National Park, Arizona. West from the foot of Toroweap.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Photos hjk00897 and hjk0897a form a stereoscopic view. #1:/Grand Canyon National Park/hjk0899a ID. Hillers, J.K. 899a Grand Canyon National Park, Arizona. Muav Canyon.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Photos hjk00899 and hjk0899a form a stereoscopic view. #1:/Grand Canyon National Park/hjk0901a ID. Hillers, J.K. 901a Grand Canyon National Park, Arizona. Muav side canyon.U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Photos hjk00901 and hjk0901a form a stereoscopic. #1:/Grand Canyon National Park/hjk0902a ID. Hillers, J.K. 902a Grand Canyon National Park, Arizona. Grand Canyon near Toroweap (or Muav). U.S. Geographical and Geological Survey of the Rocky Mountain Region (Powell Survey). Photos hjk00902 and hjk0902a form a stereoscopic view. #1:/Alaska/hjm00016 ID. Hoare, J.M. 16ct Alaska. Gently dipping conglomerate, sandstone and siltstone of Summit Island Formation on the southeast end of Summit Island. View is northwest. 1976. #1:/Hill J.M. Collection/hjm00172 ID. Hill, J.M. 172 Vanadium prospect shaft in Richardson amphitheater Looking N. 65 degrees E. along fracture zone. Grand County, Utah. June 23, 1911. #1:/Grand Teton National Park/hlc00004 ID. Huff, L.C. 4 Grand Teton National Park, Wyoming. Teton Mountains, viewed from Jackson Hole. 1949. #1:/Grand Teton National Park/hlc00005 ID. Huff, L.C. 5 Grand Teton National Park, Wyoming. Jenny Lake. 1949. #1:/Huff L.C. Collection/hlc00007 ID. Huff, L.C. 7ct "Fluted wall" - eroded cliffs with talus slopes. Moenkopi Formation, Shinarump Sandstone. Teasdale. Wayne County, Utah. August 1952. #1:/Huff L.C. Collection/hlc00020 ID. Huff, L.C. 20 U-shaped valley viewed from Red Mountain Pass, south of Ouray, Ouray County, Colorado. June 1950. #1:/Huff L.C. Collection/hlc00023 ID. Huff, L.C. 23 Looking across the pond at the gold dredge near Fairplay. Park County, Colorado. 1950. #1:/Huff L.C. Collection/hlc00024 ID. Huff, L.C. 24 Close view looking up buckets on the gold dredge near Fairplay. Park County, Colorado. 1950. #1:/Huff L.C. Collection/hlc00025 ID. Huff, L.C. 25 The upper portion of the gold dredge structure, Fairplay, Park County, Colorado. 1950. #1:/Devils Tower National Monument/hlc00032 ID. Huff, L.C. 32 Devils Tower National Monument, Wyoming. Devils Tower. June 19, 1951. #1:/Devils Tower National Monument/hlc00034 ID. Huff, L.C. 34 Devils Tower National Monument, Wyoming. Cross section of column, showing polygonal jointing. June 19, 1951. #1:/Devils Tower National Monument/hlc00035 ID. Huff, L.C. 35 Devils Tower National Monument, Wyoming. Devils Tower. June 19, 1951. #1:/Devils Tower National Monument/hlc00037 ID. Huff, L.C. 37 Devils Tower National Monument, Wyoming. Polygonal jointing. June 1951. #1:/Huff L.C. Collection-North Star Mine-Leo J. Mine/hlc00078 ID. Huff, L.C. 78 Leo J. mine, formerly North Star mine, in Bradford Canyon, showing typical occurrence of a uranium-vanadium deposit in a prominent sandstone lens of the Salt Wash Member of the Morrison Formation. West water Canyon Member of the Morrison shown to left at top of photograph. San Juan County, Utah. ca. 1956. Figure 13 in U.S. Geological Survey. Bulletin 1190. 1965. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00001 ID. Hopper, M.G. 1ct Coalinga, California, Earthquake May 2, 1983. Failure of the exterior walls of a building in the restricted area of heavily damaged downtown Coalinga. May 4, 1983. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00002 ID. Hopper, M.G. 2ct Coalinga, California, Earthquake May 2, 1983. Failure of the two-story exterior walls adjacent to the one-story building shown in photo hmg00001. The buildings were in the restricted area of heavily damaged downtown Coalinga. May 4, 1983. Photos hmg00002 through hmg00004 are of the same building. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00003 ID. Hopper, M.G. 3ct Coalinga, California, Earthquake May 2, 1983. Failed exterior walls of a two- story building in the restricted area of heavily damaged downtown Coalinga. Note coping on the building in the background. Clean-up operations are in progress. May 4, 1983. Photos hmg00002 through hmg00004 are of the same building. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00004 ID. Hopper, M.G. 4ct Coalinga, California, Earthquake May 2, 1983. Construction details of failed exterior brick walls of a two-story building in the restricted area of heavily damaged downtown Coalinga. May 4, 1983. Photos hmg00002 through hmg00004 are of the same building. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00005 ID. Hopper, M.G. 5ct Coalinga, California, Earthquake May 2, 1983. Failed second floor wall and cornice of a building in the restricted area of heavily damaged downtown Coalinga. May 4, 1983. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00006 ID. Hopper, M.G. 6ct Coalinga, California, Earthquake May 2, 1983. Failed cornice and exterior walls of a building in the restricted area of heavily damaged downtown Coalinga. May 4, 1983. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00007 ID. Hopper, M.G. 7ct Coalinga, California, Earthquake May 2, 1983. Failed second floor exterior wall of a building in the restricted area of heavily damaged downtown Coalinga. May 4, 1983. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00008 ID. Hopper, M.G. 8ct Coalinga, California, Earthquake May 2, 1983. Failed exterior walls of a building in the restricted area of heavily damaged downtown Coalinga. The water tower is still standing in the background. May 4, 1983. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00009 ID. Hopper, M.G. 9ct Coalinga, California, Earthquake May 2, 1983. Failed second-floor exterior wall of an office building in the restricted area of heavily damaged downtown Coalinga. Telephone repair work is in progress in the middleground. May 4, 1983. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00012 ID. Hopper, M.G. 12ct Coalinga, California, Earthquake May 2, 1983. Damage to a store caused by the falling exterior wall of the State Theater. The buildings were in the restricted area of heavily damaged downtown Coalinga. May 4, 1983. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00014 ID. Hopper, M.G. 14ct Coalinga, California, Earthquake May 2, 1983. Failed brick veneer, showing frame and interior wall still standing. The building was in the restricted area of heavily damaged downtown Coalinga. May 4, 1983. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00016 ID. Hopper, M.G. 16ct Coalinga, California, Earthquake May 2, 1983. Failed roof and wall of an office building in the restricted area of heavily damaged downtown Coalinga. The damage was probably caused by failure of a wall of the adjacent building. May 4, 1983. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00017 ID. Hopper, M.G. 17ct Coalinga, California, Earthquake May 2, 1983. Failed exterior walls and roof of a building in the restricted area of heavily damaged downtown Coalinga. May 4, 1983. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00018 ID. Hopper, M.G. 18ct Coalinga, California, Earthquake May 2, 1983. Slight movement of a one-story wood-frame house on its foundation, as shown by leaves. The house was in the restricted area of heavily damaged downtown Coalinga. May 4, 1983. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00019 ID. Hopper, M.G. 19ct Coalinga, California, Earthquake May 2, 1983. Failed second-story wall of an office building and consequent damage to cars parked in the adjacent lot. The office was in the restricted area of heavily damaged downtown Coalinga. May 4, 1983. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00020 ID. Hopper, M.G. 20ct Coalinga, California, Earthquake May 2, 1983. Failed walls and cornice of a building in the restricted area of heavily damaged downtown Coalinga. May 4, 1983. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00021 ID. Hopper, M.G. 21ct Coalinga, California, Earthquake May 2, 1983. Failed wall of two-story brick building in the restricted area of heavily damaged downtown Coalinga. May 4, 1983. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00022 ID. Hopper, M.G. 22ct Coalinga, California, Earthquake May 2, 1983. House displaced from its foundation. The door is below the level of the porch and offset from the steps. The house was in the restricted area of heavily damaged downtown Coalinga. May 4, 1983. See also photos hmg00023 and wre00052. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00023 ID. Hopper, M.G. 23ct Coalinga, California, Earthquake May 2, 1983. House displaced from its foundation. The door is below the level of the porch and offset from the steps. The house was in the restricted area of heavily damaged downtown Coalinga. May 4, 1983. See also photos hmg00022 and wre00052. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00025 ID. Hopper, M.G. 25ct Coalinga, California, Earthquake May 2, 1983. Failed second-story exterior wall of a building in the restricted area of heavily damaged downtown Coalinga. May 4, 1983. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00026 ID. Hopper, M.G. 26ct Coalinga, California, Earthquake May 2, 1983. Failed walls and cornice of a building in the restricted area of heavily damaged downtown Coalinga. May 4, 1983. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00028 ID. Hopper, M.G. 28ct Coalinga, California, Earthquake May 2, 1983. Collapsed and failed exterior wall of a restaurant in the restricted area of heavily damaged downtown Coalinga. May 4, 1983. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00030 ID. Hopper, M.G. 30ct Coalinga, California, Earthquake May 2, 1983. Damage to the Pacific Gas and Electric Company Coalinga substation. May 5-7, 1983. See also photos hmg00031 and wre00042. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00031 ID. Hopper, M.G. 31ct Coalinga, California, Earthquake May 2, 1983. One of the damaged exterior walls of the Pacific Gas and Electric Company Coalinga substation. May 5-7, 1983. See also photos hmg00030 and wre00042. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00032 ID. Hopper, M.G. 32ct Coalinga, California, Earthquake May 2, 1983. Damage to the West Side Fire District Oil Fields Station near the epicenter. Note the skewed door. May 5- 7, 1983. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00033 ID. Hopper, M.G. 33ct Coalinga, California, Earthquake May 2, 1983. Displaced roof tiles at Harris' Ranch Inn at Interstate 5 and California Highway 198, north of Coalinga. May 5-7, 1983. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00034 ID. Hopper, M.G. 34ct Coalinga, California, Earthquake May 2, 1983. Damaged historical marker on Highway 198 just east of the intersection with Highway 33, north of Coalinga. May 5-7, 1983. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00035 ID. Hopper, M.G. 35ct Coalinga, California, Earthquake May 2, 1983. Major failure of the exterior walls of the building containing the Coalinga TV Repair Shop. The shop was in the restricted area of heavily damaged downtown Coalinga. May 4, 1983. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00038 ID. Hopper, M.G. 38ct Coalinga, California, Earthquake May 2, 1983. One-story, wood-frame house moved on its foundation. May 5-7, 1983. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00039 ID. Hopper, M.G. 39ct Coalinga, California, Earthquake May 2, 1983. One-story, wood-frame house off its foundation. May 5-7, 1983. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00040 ID. Hopper, M.G. 40ct Coalinga, California, Earthquake May 2, 1983. Wood-frame church moved on its foundation causing the siding to warp. May 5-7, 1983. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00041 ID. Hopper, M.G. 41ct Coalinga, California, Earthquake May 2, 1983. Displaced rock chimney on a wood-frame house in the restricted area of heavily damaged downtown Coalinga. May 4, 1983. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00043 ID. Hopper, M.G. 43ct Coalinga, California, Earthquake May 2, 1983. Failed exterior brick wall. May 5-7, 1983. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00044 ID. Hopper, M.G. 44ct Coalinga, California, Earthquake May 2, 1983. Rafter and anchor bolt suspended over a failed exterior wall. May 5-7, 1983. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00045 ID. Hopper, M.G. 45ct Coalinga, California, Earthquake May 2, 1983. Massive collapse of a residence. May 5-7, 1983. This residence is possibly the same as shown in photo wre00051. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00046 ID. Hopper, M.G. 46ct Coalinga, California, Earthquake May 2, 1983. Failed exterior wall of an adobe residence. May 5-7, 1983. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00047 ID. Hopper, M.G. 47ct Coalinga, California, Earthquake May 2, 1983. Brick chimney toppled onto the roof of a wood-frame house. May 5-7, 1983. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00048 ID. Hopper, M.G. 48ct Coalinga, California, Earthquake May 2, 1983. House displaced from its foundation, as shown by movement of its columns. The house was in the restricted area of heavily damaged downtown Coalinga. May 7, 1983. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00050 ID. Hopper, M.G. 50ct Coalinga, California, Earthquake May 2, 1983. Two garden walls toppled at right angles to each other. May 5-7, 1983. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00052 ID. Hopper, M.G. 52ct Coalinga, California, Earthquake May 2, 1983. Exposed cement supports and bent metal skirts of a mobile home. May 5-7, 1983. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00056 ID. Hopper, M.G. 56ct Coalinga, California, Earthquake May 2, 1983. House displaced from its foundation, as shown by windows and doors below porch level. Note the warning posted on the left. May 5-7, 1983. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00058 ID. Hopper, M.G. 58ct Coalinga, California, Earthquake May 2, 1983. Toppled brick chimney of a brick residence. May 5-7, 1983. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00059 ID. Hopper, M.G. 59ct Coalinga, California, Earthquake May 2, 1983. Toppled roof air conditioner. Very few of these "swamp coolers" fell, but many chimneys fell within the restricted area of heavily damaged downtown Coalinga. May 7, 1983. #1:/Coalinga, California, Earthquake May 2, 1983/hmg00060 ID. Hopper, M.G. 60ct Coalinga, California, Earthquake May 2, 1983. Failed exterior wall of a building in the restricted area of heavily damaged downtown Coalinga. Photo by P. Thenhous, May 4, 1983. #1:/Yosemite National Park/hnk00001 ID. Huber, N.K. 1ct Yosemite National Park, California. Tenaya Lake in the middle distance, Tuolumne Meadows in the wooded area on the left, and Mount Dana the highest summit on the skyline. Photo by D.L. Peck. Cover, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00002 ID. Huber, N.K. 2ct Yosemite National Park, California. West down the wooded slopes from Mount Hoffman toward California's Central Valley. Figure 4-A, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00003 ID. Huber, N.K. 3ct Yosemite National Park, California. North from Mount Hoffman, including snow- patched Sawtooth Ridge and Matterhorn Peak on the skyline at the north edge of the park. Photo by T.R. Alpha. Figure 4-B, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00004 ID. Huber, N.K. 4ct Yosemite National Park, California. May Lake in the foreground. Tenaya Lake on the right in the middle distance. Tuolumne Meadows in the wooded area on the left. Mount Dana is the highest summit on the skyline beyond. View is east. Figure 4-C, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00005 ID. Huber, N.K. 5ct Yosemite National Park, California. South from Mount Hoffman, toward Clouds Rest, in the late spring, with Mount Clark on the left skyline. Half Dome, at the far right center, displays its northeast shoulder, in contrast to its often pictured profile from Yosemite Valley's floor. Photo by U.S. National Park Service. Figure 4-D, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00007 ID. Huber, N.K. 7ct Yosemite National Park, California. El Capitan Granite, freshly broken rock surface. Figure 10-A, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00008 ID. Huber, N.K. 8ct Yosemite National Park, California. El Capitan Granite. Rock surface chemically etched and stained to differentiate potassium feldspar (orange- yellow), plagioclase (red), and quartz (uncolored). Figure 10-B, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00009 ID. Huber, N.K. 9ct Yosemite National Park, California. Half Dome Granodiorite contains large, well-formed hornblende crystals. Figure 11-A, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00010 ID. Huber, N.K. 10ct Yosemite National Park, California. Sentinel Granodiorite contains both biotite and hornblende in poorly formed crystals. Figure 11-B, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00011 ID. Huber, N.K. 11ct Yosemite National Park, California. Leaning Tower Granodiorite has a spotted appearance from rounded clots of dark minerals. Figure 11-C, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00012 ID. Huber, N.K. 12ct Yosemite National Park, California. Bridalveil Granodiorite has a salt-and- pepper appearance from fine, evenly distributed light and dark minerals. Figure 11-D, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00013 ID. Huber, N.K. 13ct Yosemite National Park, California. Diorite is mostly plagioclase and dark minerals with little quartz and potassium feldspar. Figure 12, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00014 ID. Huber, N.K. 14ct Yosemite National Park, California. Dike of light-colored, fine-grained aplite crosscutting granodiorite. Aplite is a silica-rich rock composed chiefly of quartz and potassium feldspar. Figure 13, U.S. Geological Survey Bulletin 1595. #1:/Huber N.K. Collection-Yosemite National Park/hnk00015 ID. Huber, N.K. 15ct Porphyritic texture in Cathedral Peak Granodiorite, with potassium feldspar phenocrysts much larger than the other minerals in the rock matrix. Yosemite National Park. California. n.d. Published as figure 14 in U.S. Geological Survey. Bulletin 1595. 1987. #1:/Yosemite National Park/hnk00016 ID. Huber, N.K. 16ct Yosemite National Park, California. Aligned dark diorite inclusions in granodiorite. Photo by D.L. Peck. Figure 15, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00017 ID. Huber, N.K. 17ct Yosemite National Park, California. Schlieren - streaks or layers formed by the clustering of dark minerals during differential flow within the partially solidified magma. Note the parallel alignment of potassium feldspar phenocrysts by the same process. Larger phenocrysts are about 2 inches long. Figure 16, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00018 ID. Huber, N.K. 18ct Yosemite National Park, California. Johnson Granite Porphyry, showing potassium feldspar phenocrysts set in a fine-grained matrix. Figure 21, U.S. Geological Survey Bulletin 1595. #1:/Isle Royale National Park/hnk00019 ID. Huber, N.K. 19 Isle Royale National Park, Michigan. Amygdaloid Island Flow with characteristic agate amygdules (sawed surface) from the northeast end of Amygdaloid Island. Circa 1971. Figure 15, U.S. Geological Survey Professional Paper 754-C; Figure 75, U.S. Geological Survey Bulletin 1309. #1:/Yosemite National Park/hnk0001a ID. Huber, N.K. 1act Yosemite National Park, California. Half Dome at sunset. Photo by D.L. Peck. Frontispiece, U.S. Geological Survey Bulletin 1595. #1:/Isle Royale National Park/hnk00020 ID. Huber, N.K. 20 Isle Royale National Park, Michigan. Specimen from the Washington Island Flow. Ophitic texture is obscure, but characteristic dark chlorite splotches are visible. Circa 1971. Figure 16, U.S. Geological Survey Professional Paper 754-C; Figure 25, U.S. Geological Survey Bulletin 1309. #1:/Yosemite National Park/hnk00022 ID. Huber, N.K. 22ct Yosemite National Park, California. Volcanic mudflow deposit on Rancheria Mountain. Brown, smooth-appearing slope to the right, at middle distance, is underlain by a volcanic mudflow deposit filling an ancient stream channel. The river flowed westward from the viewer to the present canyon of the Tuolumne River in the background. The former Tuolumne River flowed left to right into the base of the brown area, concealed by trees in the center, and at this point was then 1,500 feet above the present canyon of the Tuolumne. This difference in elevation indicates the amount of stream incision by the Tuolumne River since its former channel was filled and abandoned and the river was forced to cut a new one. Photo by C. Wahrhaftig. Figure 31, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00023 ID. Huber, N.K. 23ct Yosemite National Park, California. Columnar joints in a basalt plug, a remnant of a volcanic conduit at "Little Devils Postpile" adjacent to the Tuolumne River west of Tuolumne Meadows. Figure 32, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00024 ID. Huber, N.K. 24ct Yosemite National Park, California. Inclined joints determine the westward slope of the upper surface of the Three Brothers. Photo by U.S. National Park Service. Figure 34, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00025 ID. Huber, N.K. 25ct Yosemite National Park, California. Staircase Falls. Stair treads follow joints inclined eastward. Photo by T.R. Alpha. Figure 35, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00026 ID. Huber, N.K. 26ct Yosemite National Park, California. Rectangular blocks formed in El Capitan Granite by intersecting joints. Figure 36, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00027 ID. Huber, N.K. 27ct Yosemite National Park, California. The Rockslides and El Capitan. The Rockslides (left) is a jumbled collection of talus blocks of diorite, the most closely jointed rock in Yosemite Valley. In contrast, El Capitan (right) is largely unjointed granite, and the pile of debris at its foot, though concealed in this photograph, is comparatively small. Figure 37, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00028 ID. Huber, N.K. 28ct Yosemite National Park, California. Bold exposure of unjointed Half Dome Granodiorite (in sun) capped by mostly well-jointed tonalite (in shade) making up Glacier Point. The contact between the two rock types angles upward to the left. Figure 38, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00029 ID. Huber, N.K. 29ct Yosemite National Park, California. Sheet joints follow topographic surfaces. Horizontal sheeting on a quarry face cut into a broad, level surface. Figure 40-A, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00030 ID. Huber, N.K. 30ct Yosemite National Park, California. Sheet joints follow topographic surfaces. Convex sheeting on a granite dome. Figure 40-B, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00031 ID. Huber, N.K. 31ct Yosemite National Park, California. Sheet joints follow topographic surfaces. Concave sheeting on a valley floor. Figure 40C, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00032 ID. Huber, N.K. 32ct Yosemite National Park, California. Sheet joints follow topographic surfaces. Near vertical sheeting on Matthes Crest. Figure 40-D, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00033 ID. Huber, N.K. 33ct Yosemite National Park, California. Undulating surface below Clouds Rest. The sheet joints are concave in the bowl-shaped basins high on the cliff face and convex on the intervening spurs. Figure 41, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00034 ID. Huber, N.K. 34ct Yosemite National Park, California. Road cut at Big Meadow Overlook on Big Oak Flat Road. Spheroidal weathering around corestones. Rectangular pattern of sheets reflects horizontal and vertical orientation of joints originally bounding the disintegrating blocks. Figure 44, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00035 ID. Huber, N.K. 35ct Yosemite National Park, California. Weather pans (or pits) formed on the summit of North Dome, high above Yosemite Valley. Neighboring pans coalesce as a result of progressive expansion at the expense of intermediate partitions. Photo by U.S. National Park Service. Figure 45, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00036 ID. Huber, N.K. 36ct Yosemite National Park, California. Resistant potassium feldspar phenocrysts protrude from the weathered surface of Cathedral Peak Granodiorite. Matrix minerals formerly enclosing the phenocrysts have been weathered to grus (granite sand) and washed away. Figure 46, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00037 ID. Huber, N.K. 37ct Yosemite National Park, California. Knobs of resistant fine-grained diorite protrude from the weathered outcrop surface of El Capitan Granite. Figure 47, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00038 ID. Huber, N.K. 38ct Yosemite National Park, California. Natural bridge formed where weather- resistant aplite bridges an opening eroded in underlying, less resistant Half Dome Granodiorite. Figure 48, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00039 ID. Huber, N.K. 39ct Yosemite National Park, California. Rockfall of blocks the size of small houses temporarily closed the El Portal Road east of Arch Rock Entrance Station in 1982 until a way could be blasted through the debris. Figure 49, U.S. Geological Survey Bulletin 1595. #1:/Isle Royale National Park/hnk00040 ID. Huber, N.K. 40 Isle Royale National Park, Michigan. Ripple markings on sandstone, west of Attwood Beach. Photo by R.G. Wolff, circa 1971. Figure 35, U.S. Geological Survey Bulletin 1309. #1:/Yosemite National Park/hnk00041 ID. Huber, N.K. 41ct Yosemite National Park, California. Maclure Glacier, showing annual layers of ice accumulation exposed after the melting of seasonal snow. The layers slant upward into the glacier; the youngest layers are highest up the slope. Photo by U.S. National Park Service. Figure 52, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00042 ID. Huber, N.K. 42ct Yosemite National Park, California. Imprints on the rock left by passing debris-laden ice. Glacial polish and striation (lower right). Crescentric gouges or percussion marks are visible in the center; horns of the crescents point up-glacier. Chatter marks consist of a group of crescent shaped cracks pointing down-glacier, but generally they do not form gouges. Figure 55-A, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00043 ID. Huber, N.K. 43ct Yosemite National Park, California. Imprints on the rock left by passing debris-laden ice. Glacial polish and striations. Polished surface layer flakes off, and this evidence of glaciation gradually disappears. This excellent and accessible exposure is at the foot of Polly Dome along Tioga Road on the north side of Tenaya Lake. Figure 55-B, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00044 ID. Huber, N.K. 44ct Yosemite National Park, California. Jagged unglaciated spires of Unicorn Peak rising above the smooth shoulders of glacially scoured granite. The boundary between jagged sculpture above and smooth below, called the trimline, marks the upper limit of a former glacier along the valley wall. Figure 57, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00045 ID. Huber, N.K. 45ct Yosemite National Park, California. Bridalveil Fall, an outstanding example of a waterfall issuing from a hanging valley far above the Yosemite Valley floor. Photo by J.A. Thomas. 1987. Figure 59, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00046 ID. Huber, N.K. 46ct Yosemite National Park, California. Glacial till, an unsorted mixture of boulders, sand, and clay exposed along the Tioga Road at Siesta Lake. Figure 60, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00047 ID. Huber, N.K. 47ct Yosemite National Park, California. Glacial erratic transported by a glacier and left precariously balanced near Olmstead Point as the ice melted. Figure 61, U.S. Geological Survey Bulletin 1595. #1:/Isle Royale National Park/hnk00048 ID. Huber, N.K. 48 Isle Royale National Park, Michigan. Native copper mass from the Minong mine. This is perhaps typical of specimens from the fissure deposits on Isle Royale, but larger than average. Circa 1971. Figure 70, U.S. Geological Survey Bulletin 1309. #1:/Yosemite National Park/hnk00049 ID. Huber, N.K. 49ct Yosemite National Park, California. Tioga moraine in the Harden Lake area, showing its sharp crest and abundant boulders exposed on the surface. Figure 64, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00050 ID. Huber, N.K. 50ct Yosemite National Park, California. Tahoe moraine in the Harden Lake area, showing its subdued crest and only scattered boulders exposed on the surface. Figure 65, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hubn0050 ID. Huber, N.K. 50 Exfoliation in granite near Shuteye Peak in the Sierra Nevada Mountains. Shuteye Peak quadrangle, Madera County, California. n.d. #1:/Yosemite National Park/hnk00051 ID. Huber, N.K. 51ct Yosemite National Park, California. Perched erratic deposited on the ridge west of Upper Yosemite Fall during a pre-Tahoe glaciation. Pedestal height of 5 feet indicates the amount of rock weathered away since the boulder was dropped by the ice. Photo by U.S. National Park Service. Figure 66, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00052 ID. Huber, N.K. 52ct Yosemite National Park, California. Glacial polish high on the east shoulder of Fairview Dome. It and similar polish and erratics on the summit indicate that the dome was once overtopped by ice. Figure 66, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00053 ID. Huber, N.K. 53ct Yosemite National Park, California. Pothole Dome, a large roche moutonn‚e on the west side of Tuolumne Meadows, was shaped by glacial smoothing and plucking. The ice moved from right (stoss side) to left (leeside). The fluted surface was shaped by subglacial water scour. Figure 70, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00054 ID. Huber, N.K. 54ct Yosemite National Park, California. Potholes angling up the side of Pothole Dome on the west side of Tuolumne Meadows. Bowl-shaped potholes are carved into the rock by the grinding action of stones whirled around and kept in motion by the force of a stream in a given spot. Here, the stream flowed into a tunnel beneath the ice that covered this area during the Tioga glaciation. Figure 71, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00055 ID. Huber, N.K. 55ct Yosemite National Park, California. Subglacial water polish on Pothole Dome, formed by water flowing beneath the glacier. Surface is fluted rather than flat, as with glacial polish. Polished surface layer is flaking off. Figure 72, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00057 ID. Huber, N.K. 57ct Yosemite National Park, California. Glacial moraines in Yosemite Valley. Tioga-age terminal moraine is exposed in a road cut just east of Bridalveil Meadow. This moraine contains large boulders of Cathedral Peak Granodiorite, clear evidence of glacial transport from Tuolumne Meadows via Tenaya Canyon or from the upper Merced River basin via Little Yosemite Valley. Figure 74-A, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00058 ID. Huber, N.K. 58ct Yosemite National Park, California. Glacial moraines in Yosemite Valley. Tioga-age recessional moraine exposed in a road cut below Cathedral Rock. Large boulder in the center is Cathedral Peak Granodiorite. Figure 74-B, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00060 ID. Huber, N.K. 60ct Yosemite National Park, California. Boulder-strewn upland surface. Figure 78, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00061 ID. Huber, N.K. 61ct Yosemite National Park, California. West shoulder of Mount Hoffmann. Smooth, unglaciated south-facing slope (on the left) is abruptly truncated by a north- facing glacial cirque - a striking contrast in erosional processes. Figure 79, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00062 ID. Huber, N.K. 62ct Yosemite National Park, California. Lyell Glacier and Maclure Glacier, as they were mapped in 1883 by Willard D. Johnson of the U.S. Geological Survey. Comparison with the present-day glaciers indicates their much greater extent at that earlier date. Mount Maclure named by Josiah Whitney for an early American geologist is here mistakenly labeled "McClure". This error may be the source of occasional confusion in associating the mountain with Lt.N.F. McClure, who was not on the scene as a guardian of Yosemite National Park until after 1890. Figure 81, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk00063 ID. Huber, N.K. 63ct Yosemite National Park, California. Crevassed ice of Dana Glacier is exposed in the left center, and the glacier's bergschrund is barely visible in the shadowed area above. Since the early part of the 20th century, the glacier has retreated headward from its terminal moraine, visible in the lower right. View is southwest. Photo by M.M. Clark. 1975. Figure 82, U.S. Geological Survey Bulletin 1595. #1:/Yosemite National Park/hnk0021c ID. Huber, N.K. 21ct Yosemite National Park, California. Metamorphic rocks with relict sedimentary bedding. Highly contorted, as near Spotted Lakes. Photo by J.P. Lockwood. Figure 24-B, U.S. Geological Survey Bulletin 1595. #1:/Isle Royale National Park/hnkb0002 ID. Huber, N.K. 2 Isle Royale National Park, Michigan. Glacial striations near Moskey Basin Campground. Circa 1971. Figure 5, U.S. Geological Survey Professional Paper 754-A; Figure 47, U.S. Geological Survey Bulletin 1309. #1:/Isle Royale National Park/hnkb0003 ID. Huber, N.K. 3 Isle Royale National Park, Michigan. Glacially rounded and striated outcrop near the portage trail at Pickerel Cove. Circa 1971. Figure 6, U.S. Geological Survey Professional Paper 754-A; Figure 48, U.S. Geological Survey Bulletin 1309. #1:/Isle Royale National Park/hnkb0004 ID. Huber, N.K. 4 Isle Royale National Park, Michigan. Zone of spheroidal weathering in a basalt lava flow. This zone of partly decomposed rock escaped removal by glacial erosion because of its protected location. Circa 1971. Figure 7, U.S. Geological Survey Professional Paper 754-A. #1:/Isle Royale National Park/hnkb0005 ID. Huber, N.K. 5 Isle Royale National Park, Michigan. Granitic erratic near the summit of Feldtmann Ridge near the site of an abandoned lookout tower. Circa 1971. Figure 8, U.S. Geological Survey Professional Paper 754-A; Figure 51, U.S. Geological Survey Bulletin 1309. #1:/Isle Royale National Park/hnkb0007 ID. Huber, N.K. 7 Isle Royale National Park, Michigan. Monument Rock, a stack associated with the shoreline of postglacial Lake Minong. Photo by T. Haas, U.S. National Park Service, circa 1971. Figure 17, U.S. Geological Survey Professional Paper 754-A; Figure 67, U.S. Geological Survey Bulletin 1309. #1:/Isle Royale National Park/hnkb0008 ID. Huber, N.K. 8 Isle Royale National Park, Michigan. Wave-cut arch on Amygdaloid Island. A short distance west is a collapsed arch. Circa 1971. Figure 18, U.S. Geological Survey Professional Paper 754-A; Figure 68, U.S. Geological Survey Bulletin 1309. #1:/Isle Royale National Park/hnkb0009 ID. Huber, N.K. 9 Isle Royale National Park, Michigan. Characteristic textures of volcanic rocks on Isle Royale: typical ophite, beach pebble from Mott Island. Circa 1971. Figure 4-A, U.S. Geological Survey Professional Paper 754-C; Figure 12-A, U.S. Geological Survey Bulletin 1309. #1:/Isle Royale National Park/hnkb0010 ID. Huber, N.K. 10 Isle Royale National Park, Michigan. Characteristic textures of volcanic rocks on Isle Royale: fine-grained porphyrite from the Scoville Point Flow on the south side of North Government Island. This variety has small, blocky millimeter-sized plagioclase crystals rather uniformly distributed through the groundmass. Circa 1971. Figure 4-B, U.S. Geological Survey Professional Paper 754-C; Figure 12-B, U.S. Geological Survey Bulletin 1309. #1:/Isle Royale National Park/hnkb0011 ID. Huber, N.K. 11 Isle Royale National Park, Michigan. Characteristic textures of volcanic rocks on Isle Royale: fine-grained porphyrite, tending toward glomeroporphyrite, from the Tobin Harbor Flow on the south side of Porter Island. Circa 1971. Figure 4-C, U.S. Geological Survey Professional Paper 754-C; Figure 12-C, U.S. Geological Survey Bulletin 1309. #1:/Isle Royale National Park/hnkb0012 ID. Huber, N.K. 12 Isle Royale National Park, Michigan. Characteristic textures of volcanic rocks on Isle Royale: coarse porphyrite from the Huginnin Flow on the shoreline just west of Huginnin Cove. This variety has larger, tabular-shaped crystals more sparsely distributed in the rock and commonly occurring in clots; the large crystals are often as much as 2 centimeters long. Circa 1971. Figure 4-D, U.S. Geological Survey Professional Paper 754-C; Figure 12-D, U.S. Geological Survey Bulletin 1309. #1:/Isle Royale National Park/hnkb0013 ID. Huber, N.K. 13 Isle Royale National Park, Michigan. Characteristic textures of volcanic rocks On Isle Royale: pegmatite from the differentiated zone of the Greenstone Flow on the east end of Passage Island. This rock has a texture in which all of the minerals, especially the plagioclase, are larger when compared with those in most of the other rock types; the elongate plagioclase laths give the rock a matted appearance. Circa 1971. Figure 4-E, U.S. Geological Survey Professional Paper 754-C; Figure 12-E, U.S. Geological Survey Bulletin 1309. #1:/Isle Royale National Park/hnkb0014 ID. Huber, N.K. 14 Isle Royale National Park, Michigan. Characteristic textures of volcanic rocks on Isle Royale: trap from the Minong Flow on the west end of Isle Royale. Circa 1971. Figure 4-F, U.S. Geological Survey Professional Paper 754-C; Figure 12-F, U.S. Geological Survey Bulletin 1309. #1:/Isle Royale National Park/hnkb0015 ID. Huber, N.K. 15 Isle Royale National Park, Michigan. Coarse ophite with knobby weathered Surface from the outh side of Raspberry Island. The penknife is 7 centimeters long. Circa 1971. Figure 5, U.S. Geological Survey Professional Paper 754-C; Figure 13, U.S. Geological Survey Bulletin 1309. #1:/Isle Royale National Park/hnkb0016 ID. Huber, N.K. 16 Isle Royale National Park, Michigan. Porphyrite from the Huginnin Flow on the beach at Huginnin Cove. The pencil is approximately 15 centimeters long. Circa 1971. Figure 12, U.S. Geological Survey Professional Paper 754-C; Figure 23, U.S. Geological Survey Bulletin 1309. #1:/Isle Royale National Park/hnkb0017 ID. Huber, N.K. 17 Isle Royale National Park, Michigan. Beach cobble of porphyrite from the Grace Island Flow on Grace Island with a rather unusual distribution of plagioclase phenocrysts. The dark spots are amygdules of pumpellyite. The long dimension is 15 centimeters. Circa 1971. Figure 13, U.S. Geological Survey Professional Paper 754-C; Figure 24, U.S. Geological Survey Bulletin 1309. #1:/Isle Royale National Park/hnkb0018 ID. Huber, N.K. 18 Isle Royale National Park, Michigan. Columnar jointing in the Edwards Island Flow on the north side of Edwards Island. Circa 1971. Figure 14, U.S. Geological Survey Professional Paper 754-C; Figure 18, U.S. Geological Survey Bulletin 1309. #1:/Isle Royale National Park/hnkb0022 ID. Huber, N.K. 22 Isle Royale National Park, Michigan. Breccia occurring above the Amygdaloid Island Flow on the south shore at the east end of Amygdaloid Island. Circa 1971. Figure 19, U.S. Geological Survey Professional Paper 754-C. #1:/Isle Royale National Park/hnkb0023 ID. Huber, N.K. 23 Isle Royale National Park, Michigan. Tuff-breccia overlying the Greenstone Flow. Fragmental character is clearly evident in this outcrop, which is close to the base of the pyroclastic unit on the north shore of Tobin Harbor near Newman Island. The knife is 7 centimeters long. Circa 1971. Figure 20, U.S. Geological Survey Professional Paper 754-C; Figure 20, U.S. Geological Survey Bulletin 1309. #1:/Isle Royale National Park/hnkb0024 ID. Huber, N.K. 24 Isle Royale National Park, Michigan. Agate typical of those occurring in the Tuff-breccia overlying the Greenstone Flow. The knife is 7 centimeters long. Circa 1971. Figure 21, U.S. Geological Survey Professional Paper 754-C; Figure 76, U.S. Geological Survey Bulletin 1309. #1:/Isle Royale National Park/hnkb0025 ID. Huber, N.K. 25 Isle Royale National Park, Michigan. Hoist and boiler remains at the island mine, abandoned in 1877. Circa 1971. Figure 2, U.S. Geological Survey Bulletin 1309. #1:/Isle Royale National Park/hnkb0026 ID. Huber, N.K. 26 Isle Royale National Park, Michigan. Rocky shoreline on Isle Royale. Circa 1971. Figure 3, U.S. Geological Survey Bulletin 1309. #1:/Isle Royale National Park/hnkb0027 ID. Huber, N.K. 27 Isle Royale National Park, Michigan. Fingerlike promontories on the northeast end of Isle Royale. Photo by A. Eliason, U.S. National Park Service, circa 1971. Figure 4, U.S. Geological Survey Bulletin 1309. #1:/Isle Royale National Park/hnkb0028 ID. Huber, N.K. 28 Isle Royale National Park, Michigan. Across Duncan Bay from Lookout Louise. Circa 1971. Figure 5, U.S. Geological Survey Bulletin 1309. #1:/Isle Royale National Park/hnkb0029 ID. Huber, N.K. 29 Isle Royale National Park, Michigan. Bull moose feeding in a beaver pond. Circa 1971. Figure 6, U.S. Geological Survey Bulletin 1309. #1:/Isle Royale National Park/hnkb0031 ID. Huber, N.K. 31 Isle Royale National Park, Michigan. Amygdaloid with calcite amygdules and calcite vein at top. Circa 1971. Figure 14, U.S. Geological Survey Bulletin 1309. #1:/Isle Royale National Park/hnkb0032 ID. Huber, N.K. 32 Isle Royale National Park, Michigan. Ancient lava flow with ropy surface. Circa 1971. Figure 16 (upper photo), U.S. Geological Survey Bulletin 1309. #1:/Isle Royale National Park/hnkb0034 ID. Huber, N.K. 34 Isle Royale National Park, Michigan. Copper Harbor Conglomerate sloping gently southeast into Lake Superior near Attwood Beach. Circa 1971. Figure 26, U.S. Geological Survey Bulletin 1309. #1:/Isle Royale National Park/hnkb0035 ID. Huber, N.K. 35 Isle Royale National Park, Michigan. Sandstone pebble beach west of Little Boat Harbor.U.S. National Park Service boat "D.J. Tobin" provided transportation for geologic studies. Circa 1971. Figure 27, U.S. Geological Survey Bulletin 1309. #1:/Isle Royale National Park/hnkb0036 ID. Huber, N.K. 36 Isle Royale National Park, Michigan. Slabby sandstone outcrop on Stone House Island. Circa 1971. Figure 28, U.S. Geological Survey Bulletin 1309. #1:/Isle Royale National Park/hnkb0037 ID. Huber, N.K. 37 Isle Royale National Park, Michigan. Cliff in Copper Harbor Conglomerate on the north side of Feldtmann Ridge. Circa 1971. Figure 29, U.S. Geological Survey Bulletin 1309. #1:/Isle Royale National Park/hnkb0038 ID. Huber, N.K. 38 Isle Royale National Park, Michigan. Water-current feature formed by flow deflected around shale fragments. Direction of the current flow is toward the right. Circa 1971. Figure 31, U.S. Geological Survey Bulletin 1309. #1:/Isle Royale National Park/hnkb0039 ID. Huber, N.K. 39 Isle Royale National Park, Michigan. Chlorastrolite amygdules showing characteristic segmented pattern. Circa 1971. Figure 72, U.S. Geological Survey Bulletin 1309. #1:/Isle Royale National Park/hnkb0041 ID. Huber, N.K. 41 Isle Royale National Park, Michigan. Ancient desiccation cracks on siltstone at Isle Royale compared to similar features on modern drying mud. Circa 1971. Figure 36-A, U.S. Geological Survey Bulletin 1309. #1:/Isle Royale National Park/hnkb0042 ID. Huber, N.K. 42 Isle Royale National Park, Michigan. Specimen of ancient raindrop impressions on siltstone at Isle Royale. Circa 1971. Figure 36-B, U.S. Geological Survey Bulletin 1309. #1:/Isle Royale National Park/hnkb0043 ID. Huber, N.K. 43 Isle Royale National Park, Michigan. Modern drying mud showing features similar to ancient desiccation cracks and raindrop impressions on siltstone. Photo by D.M. Baird, circa 1971. Figure 36-C, U.S. Geological Survey Bulletin 1309. #1:/Isle Royale National Park/hnkb0044 ID. Huber, N.K. 44 Isle Royale National Park, Michigan. Prehnite amygdules in beach pebble derived from lava flow. Long dimension of the pebble is 5 centimeters. Circa 1971. Figure 73, U.S. Geological Survey Bulletin 1309. #1:/Isle Royale National Park/hnkb0046 ID. Huber, N.K. 46 Isle Royale National Park, Michigan. Fossil shell in chert pebble. Circa 1971. Figure 50, U.S. Geological Survey Bulletin 1309. #1:/Isle Royale National Park/hnkb0047 ID. Huber, N.K. 47 Isle Royale National Park, Michigan. Specimen of Prehnite amygdules. Note the radiating fibrous structure with development of "eyes." Circa 1971. Figure 74, U.S. Geological Survey Bulletin 1309. #1:/Isle Royale National Park/hnkb0049 ID. Huber, N.K. 49 Isle Royale National Park, Michigan. Conglomerate with native copper from the Island mine. This specimen has been sawed and lightly polished so that the copper reflects light and shows up as light-colored, irregular-shaped patches. The specimen is 8 centimeters wide. Circa 1971. Figure 71, U.S. Geological Survey Bulletin 1309. #1:/Mesa Verde National Park/hob00031 ID. Hopkins, O.B. 31 Mesa Verde National Park, Colorado. Balcony House restored. 1914. #1:/Mesa Verde National Park/hob00037 ID. Hopkins, O.B. 37 Mesa Verde National Park, Colorado. Cliff Palace. 1914. #1:/Mesa Verde National Park/hob00039 ID. Hopkins, O.B. 39 Mesa Verde National Park, Colorado. South end of Cliff Palace. 1914. #1:/Mesa Verde National Park/hob00040 ID. Hopkins, O.B. 40 Mesa Verde National Park, Colorado. North end of Cliff Palace. 1914. #1:/Mesa Verde National Park/hob00041 ID. Hopkins, O.B. 41 Mesa Verde National Park, Colorado. Knife Edge near Point Lookout. 1914. #1:/Mesa Verde National Park/hob00050 ID. Hopkins, O.B. 50 Mesa Verde National Park, Colorado. Spruce Tree House. 1914. #1:/Canelo Hills Volcanics/hpt00050 ID. Hayes, P.T. 50 Canelo Hills Volcanics, Huachuca Mountains, Arizona. Specimen of conglomeratic sandstone from the lower member of the Canelo Hills Volcanics. The abundant angular pebbles and granules were derived from siliceous volcanic rocks. Circa 1968. Figure 3, U.S. Geological Survey Professional Paper 658-A. #1:/Canelo Hills Volcanics/hpt00051 ID. Hayes, P.T. 51 Canelo Hills Volcanics, Huachuca Mountains, Arizona. Specimen of fine-grained biotite-rich tuff from the lower member of the Canelo Hills Volcanics. Circa 1968. Figure 4, U.S. Geological Survey Professional Paper 658-A. #1:/Canelo Hills Volcanics/hpt00053 ID. Hayes, P.T. 53 Canelo Hills Volcanics, Huachuca Mountains, Arizona. Specimen of crystal-rich welded tuff from the welded tuff member of the Canelo Hills Volcanics. Circa 1968. Figure 6, U.S. Geological Survey Professional Paper 658-A. #1:/Loma Prieta, California, Earthquake October 17, 1989/hra00001 ID. Haugerud, R.A. 1ct Loma Prieta, California, Earthquake October 17, 1989. Los Gatos. Drain grating shows the effects of compression. Slide VIII-8, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/hra00002 ID. Haugerud, R.A. 2ct Loma Prieta, California, Earthquake October 17, 1989. Highway 17 in the Santa Cruz Mountains. Broken concrete divider near the intersection of Summit Road and Highway 17. Slide XII-5, U.S. Geological Survey Open-File Report 90-547. #1:/Hill R.T. Collection-Big Bend National Park/hrt00001 ID. Hill, R.T. 1 Santa Helena scarp and boca of the Grand Canyon de Santa Helena. Big Bend National Park. Brewster County, Texas 1899. #1:/Big Bend National Park/hrt00002 ID. Hill, R.T. 2 Mr. Hill's party leaving the canyons of the Rio Grande at Langtry, left to right: James MacMahon boatman, Robert T. Hill, Prentice B. Hill assistant, Shorty Franklin boatman, Henry J. Ware boatman and Serafino Torrez cook. Thus completing the first exploration of the Big Bend portion of the Rio Grande. Valverde County, Texas. October 28, 1899. #1:/Hill R.T. Collection-Big Bend National Park/hrt00003 ID. Hill, R.T. 3 North Peak, Chisos Mountains. Big Bend National Park. Brewster County, Texas 1899. #1:/Hill R.T. Collection-Big Bend National Park/hrt00052 ID. Hill, R.T. 52 Summit of Santa Helena canyon, ten miles north of the Rio Grande, Quicksilver Mountain on extreme right; fault cliff on right, valley of Terlingua Creek in foreground. Karrenfelder surface of plateau. Big Bend National Park. Brewster County, Texas 1899. #1:/Hill R.T. Collection-Big Bend National Park/hrt00056 ID. Hill, R.T. 56 Grand Canyon of the Santa Helena. Big Bend National Park. Brewster County, Texas 1899. #1:/Hill R.T. Collection-Big Bend National Park/hrt00061 ID. Hill, R.T. 61 Boca (mouth?) Grand Canyon de Santa Helena. Big Bend National Park. Brewster County, Texas 1899 #1:/Hill R.T. Collection-Big Bend National Park/hrt00071 ID. Hill, R.T. 71 Carmen Canyon. Big Bend National Park. Brewster County, Texas 1899. #1:/Hill R.T. Collection-Guadalupe Mountains National Park/hrt00158 ID. Hill, R.T. 158 Guadalupe Mountains. Guadalupe Mountains National Park. Hudspeth County, Texas. 1899. #1:/Hill R.T. Collection-Guadalupe Mountains National Park/hrt00159 ID. Hill, R.T. 159 Sierra Guadalupe. Guadalupe Mountains National Park. Hudspeth County, Texas. 1899. #1:/Hill R.T. Collection-Guadalupe Mountains National Park/hrt00160 ID. Hill, R.T. 160 Guadalupe Peak. Guadalupe Mountains National Park. Culberson County, Texas. 1899. #1:/Hill R.T. Collection-Guadalupe Mountains National Park/hrt00161 ID. Hill, R.T. 161 Guadalupe Pass. Guadalupe Mountains National Park. Culberson County, Texas. 1899. #1:/Hill R.T. Collection-Guadalupe Mountains National Park/hrt00162 ID. Hill, R.T. 162 Capitan Limestone and Delaware Mountain formation (Guadalupe Group) at Guadalupe Point. El Capitan Peak in right background highest point in Texas. Culberson County Texas. 1899. Plate 8-A in U.S. Geological Survey. Bulletin 794. 1928. #1:/Coeur d'Alene District/hsw00002 ID. Hobbs, S.W. 2 Coeur d'Alene District, Idaho. Casts of shallow mud cracks on the underside of a bed of impure quartzite from the St. Regis Formation. Figure 3-B, U.S. Geological Survey Professional Paper 478. #1:/Coeur d'Alene District/hsw00003 ID. Hobbs, S.W. 3 Coeur d'Alene District, Idaho. Contorted mud cracks in an argillitic bed in the lower part of the Wallace Formation. Figure 4, U.S. Geological Survey Professional Paper 478. #1:/Coeur d'Alene District/hsw00007 ID. Hobbs, S.W. 7 Coeur d'Alene District, Idaho. Differential weathering in rock from the lower part of the Wallace Formation. Figure 8, U.S. Geological Survey Professional Paper 478. #1:/Hendricks T.A. Collection/hta00003 ID. Hendricks, T.A. 3 Ned and Hollis lakes, the two lakes are parts of an old oxbow lake in a cut-off meander of the Arkansas River, 4 miles southeast of Van Buren. Note meander scars on the flood plain from high level terrace deposits in the upper right corner. Photograph courtesy the Agricultural Adjustment Administration. Crawford County, Arkansas. 1936. Figure 18 in U.S. Geological Survey. Professional paper 221-E. 1950. #1:/Heikes V.C. Collection-Mineral Products Corporation/hvc00001 ID. Heikes, V.C. 1 Mineral Products Corporation, potash mill, south side. Marysvale, Piute County, Utah. October 5, 1915. #1:/Heikes V.C. Collection-Mineral Products Corporation/hvc00002 ID. Heikes, V.C. 2 Mineral Products Corporation, potash mill, west end. Marysvale, Piute County, Utah. October 5, 1915. #1:/Heikes V.C. Collection-Mineral Products Corporation/hvc00003 ID. Heikes, V.C. 3 Mineral Products Corporation, potash mill, south side. Shows calcining cylinder 125 feet long. Deer trail Mountain in background. Marysvale, Piute County, Utah. October 5, 1915. #1:/Heikes V.C. Collection-Mineral Products Corporation/hvc00004 ID. Heikes, V.C. 4 Mineral Products Corporation, potash mill, east end. First allumins cake from filter press discharge. Marysvale, Piute County, Utah. October 4, 1915. #1:/Heikes V.C. Collection-Mineral Products Corporation/hvc00005 ID. Heikes, V.C. 5 Mineral Products Corporation, potash mill, south side of east end. Shows elevator belt for handling slack coal to grinders for use on calcining furnace. October 5, 1915. #1:/Heikes V.C. Collection/hvc00011 ID. Heikes, V.C. 11 Quincy Tunnel, Alta, shows Emma dump and Flagstaff Boarding House. Salt Lake County, Utah. October 3, 1915. #1:/Hawaii Volcanoes National Park/hvo00001 ID. HVO 1ct Hawaii Volcanoes National Park. 1940 eruption of Mauna Loa Volcano. Flows and fountain at Mokuaweoweo, the summit caldera. Photo by G.O. Fagerlund, April 9, 1940. #1:/Hawaii Volcanoes National Park/hvo00002 ID. HVO 2ct Hawaii Volcanoes National Park. 1940 eruption of Mauna Loa Volcano. Flows and fountain at Mokuaweoweo, the summit caldera. Photo by G.O. Fagerlund, April 9, 1940. #1:/Hawaii Volcanoes National Park/hvo00003 ID. HVO 3ct Hawaii Volcanoes National Park. 1940 eruption of Mauna Loa Volcano. Flows and fountain at Mokuaweoweo, the summit caldera. Photo by G.O. Fagerlund, April 9, 1940. #1:/Hawaii Volcanoes National Park/hvo00010 ID. HVO 10ct Hawaii Volcanoes National Park. 1950 eruption of Mauna Loa Volcano. Glow at night(?) from upper vents on a fume column, viewed from Uwekahuna. Photo by G.A. Macdonald, June 1, 1950. #1:/Hawaii Volcanoes National Park/hvo00014 ID. HVO 14ct Hawaii Volcanoes National Park. May 1954 eruption of Kilauea Volcano. Halemaumau fountains. Photo by J.P. Eaton, May 31, 1954. #1:/Hawaii Volcanoes National Park/hvo00015 ID. HVO 15ct Hawaii Volcanoes National Park. May 1954 eruption of Kilauea Volcano. Halemaumau fountains, viewed from the east. Photo by J.P. Eaton, May 31, 1954. #1:/Hawaii Volcanoes National Park/hvo00016 ID. HVO 16ct Hawaii Volcanoes National Park. 1955 eruption of Kilauea Volcano. Ash on jeep on the summit of the volcano. Windshield wipers have cleared an area of glass for contrast. Photo by J.P. Eaton, March 1, 1955. #1:/Hawaii Volcanoes National Park/hvo00017 ID. HVO 17ct Hawaii Volcanoes National Park. 1955 eruption of Kilauea Volcano. Bulldozers at the Iwasaki division barrier in Puna District. Photo by J.P. Eaton, March 21, 1955. #1:/Hawaii Volcanoes National Park/hvo00018 ID. HVO 18ct Hawaii Volcanoes National Park. 1955 eruption of Kilauea Volcano. Bulldozers at the Iwasaki division barrier in Puna District. Photo by J.P. Eaton, March 21, 1955. #1:/Hawaii Volcanoes National Park/hvo00019 ID. HVO 19ct Hawaii Volcanoes National Park. 1955 eruption of Kilauea Volcano. Lava entering the sea produced huge steam clouds. Photo by J.P. Eaton, March 28, 1955. #1:/Hawaii Volcanoes National Park/hvo00020 ID. HVO 20ct Hawaii Volcanoes National Park. 1955 eruption of Kilauea Volcano. Iwasaki house in flames. Photo by J.P. Eaton, May 19, 1955. #1:/Hawaii Volcanoes National Park/hvo00021 ID. HVO 21ct Hawaii Volcanoes National Park. 1959 eruption of Kilauea Volcano, first phase of activity in Kilauea Iki Crater. Start of eruption. Photo by J.P. Eaton, November 1959. #1:/Hawaii Volcanoes National Park/hvo00022 ID. HVO 22ct Hawaii Volcanoes National Park. 1959 eruption of Kilauea Volcano, first phase of activity in Kilauea Iki Crater. Flow and cascades, viewed from Byron Ledge overlook just east of the crater. November 14, 1959. #1:/Hawaii Volcanoes National Park/hvo00024 ID. HVO 24ct Hawaii Volcanoes National Park. 1959 eruption of Kilauea Volcano. Fountains in Kilauea Iki Crater, viewed from the housing area. Photo by J.P. Eaton, November 1959. #1:/Hawaii Volcanoes National Park/hvo00025 ID. HVO 25ct Hawaii Volcanoes National Park. 1959 eruption of Kilauea Volcano. Fountains in Kilauea Iki Crater. Trees are black outlines in the foreground. Photo by J.P. Eaton, November 1959. #1:/Hawaii Volcanoes National Park/hvo00026 ID. HVO 26cp Hawaii Volcanoes National Park. Hiatus exposed in the north wall of Pauahi Crater: yellow tephra, which is a mixture of blocks and ash. This Tephra may consist in part of Uwekahuna Ash Member. Because it grades laterally into coarse debris in the crater of a buried tephra cone nearby, at least some of it may have been ejected from a local source. Organic ash is abundant atop the tephra, and the overlying lava flow contains many tree molds. Photo by J.D. Griggs, October 1985. Figure 12.27-B, U.S. Geological Survey Professional Paper 1350. #1:/Hawaii Volcanoes National Park/hvo00027 ID. HVO 27cp Hawaii Volcanoes National Park. Hiatus exposed in Makaopuhi Crater: northwest wall of the crater, viewed from the west rim, showing lower layer of yellow tephra separated by thin lava flows from the upper layer of reddish tephra. Massive lava flows above the red tephra occur in the flank of Kane Nui o Hamo lava shield. Photo by R.T. Holcomb, February 6, 1973. Figure 12.28-A, U.S. Geological Survey Professional Paper 1350. #1:/Hawaii Volcanoes National Park/hvo00032 ID. HVO 32ct Hawaii Volcanoes National Park. 1960 eruption of Kilauea Volcano. Papaya and fountain at Kapoho. January 1960. #1:/Hawaii Volcanoes National Park/hvo00033 ID. HVO 33ct Hawaii Volcanoes National Park. 1960 eruption of Kilauea Volcano. Papaya trees stripped, fountain in the background at Kapoho. January 1960. #1:/Hawaii Volcanoes National Park/hvo00034 ID. HVO 34ct Hawaii Volcanoes National Park. 1960 eruption of Kilauea Volcano. Fried papaya on a tree at Kapoho. January 1960. #1:/Hawaii Volcanoes National Park/hvo00035 ID. HVO 35ct Hawaii Volcanoes National Park. 1960 eruption of Kilauea Volcano. Higashi pond with the night sky aglow. January 1960. #1:/Hawaii Volcanoes National Park/hvo00036 ID. HVO 36ct Hawaii Volcanoes National Park. 1960 eruption of Kilauea Volcano. Aa lava flow at the school in Kapoho. January 1960. #1:/Hawaii Volcanoes National Park/hvo00038 ID. HVO 38ct Hawaii Volcanoes National Park. 1960 eruption of Kilauea Volcano. Burning house in Kapoho. January 23, 1960. #1:/Hawaii Volcanoes National Park/hvo00039 ID. HVO 39ct Hawaii Volcanoes National Park. 1960 eruption of Kilauea Volcano. Burning house in Kapoho. January 23, 1960. #1:/Hawaii Volcanoes National Park/hvo00045 ID. HVO 45ct Hawaii Volcanoes National Park. 1960 eruption of Kilauea Volcano. Steaming Halemaumau Crater, viewed from Kilauea Iki Crater overlook. The steam cloud is pink (sunset?). Photo by W.U. Ault, March 7, 1960. #1:/Hawaii Volcanoes National Park/hvo00058 ID. HVO 58ct Hawaii Volcanoes National Park. March 1965 eruption of Kilauea Volcano. Lava cascades (left) on Makaopuhi lava lake. Photo by D.L. Peck, March 5, 1965. #1:/Hawaii Volcanoes National Park/hvo00060 ID. HVO 60ct Hawaii Volcanoes National Park. March 1965 eruption of Kilauea Volcano. Lava cascades on Makaopuhi lava lake just visible on the left. Lava glows through cracks on the lake surface. Photo by D.P. Hill, March 5, 1965. #1:/Hawaii Volcanoes National Park/hvo00061 ID. HVO 61ct Hawaii Volcanoes National Park. March 1965 eruption of Kilauea Volcano. Lava glows through cracks on the surface of Makaopuhi lava lake. Photo by D.P. Hill, March 6, 1965. #1:/Hawaii Volcanoes National Park/hvo00064 ID. HVO 64ct Hawaii Volcanoes National Park. March 1965 eruption of Kilauea Volcano. Some cracks on the surface of Makaopuhi lava lake. Other areas are solid red/orange lava. Photo by D.L. Peck, March 9, 1965. #1:/Hawaii Volcanoes National Park/hvo00065 ID. HVO 65ct Hawaii Volcanoes National Park. March 1965 eruption of Kilauea Volcano. Some cracks on the surface of Makaopuhi lava lake. Other areas are solid red/orange lava. Photo by D.L. Peck, March 9, 1965. #1:/Hawaii Volcanoes National Park/hvo00066 ID. HVO 66ct Hawaii Volcanoes National Park. March 1965 eruption of Kilauea Volcano. A few cracks on Makaopuhi lava lake showing glow of lava. Photo by D.L. Peck, March 11, 1965. #1:/Hawaii Volcanoes National Park/hvo00067 ID. HVO 67ct Hawaii Volcanoes National Park. Willie Kinoshita at a water tilt on the summit of Kilauea Volcano. 1967(?). #1:/Hawaii Volcanoes National Park/hvo00070 ID. HVO 70ct Hawaii Volcanoes National Park. 1967-1968 eruption of Kilauea Volcano. Halemaumau fountains and lava lake at night. Photo by C. Stoughton, 1967. #1:/Hawaii Volcanoes National Park/hvo00071 ID. HVO 71ct Hawaii Volcanoes National Park. 1967-1968 eruption of Kilauea Volcano. Halemaumau Crater. Photo by C. Stoughton, December 4, 1967. #1:/Hawaii Volcanoes National Park/hvo00072 ID. HVO 72ct Hawaii Volcanoes National Park. 1967-1968 eruption of Kilauea Volcano. Halemaumau lava pond and flows. Photo by C. Stoughton, January 5, 1968. #1:/Hawaii Volcanoes National Park/hvo00074 ID. HVO 74ct Hawaii Volcanoes National Park. 1967-1968 eruption of Kilauea Volcano. Halemaumau fume, viewed from Waldron Ledge. Photo by D.A. Swanson, May 18, 1968. #1:/Hawaii Volcanoes National Park/hvo00075 ID. HVO 75ct Hawaii Volcanoes National Park. August 1968 eruption of Kilauea Volcano. Eruptive fissure east of Escape Road. Photo by D.A. Swanson, September 13, 1968. #1:/Hawaii Volcanoes National Park/hvo00076 ID. HVO 76ct Hawaii Volcanoes National Park. August 1968 eruption of Kilauea Volcano. Spatter in a tree downwind from vent 3 (to the right). Note the sulfur coating. Photo by D.A. Swanson, September 13, 1968. #1:/Hawaii Volcanoes National Park/hvo00077 ID. HVO 77ct Hawaii Volcanoes National Park. October 1968 eruption of Kilauea Volcano. Glowing tree mold west of Napau Crater. Photo by D.A. Swanson, October 12, 1968. #1:/Hawaii Volcanoes National Park/hvo00079 ID. HVO 79ct Hawaii Volcanoes National Park. February 1969 eruption of Kilauea Volcano. Slump at the edge of Alae Crater has split Chain of Craters Road. Photo by D.A. Swanson, February 28, 1969. #1:/Hawaii Volcanoes National Park/hvo00080 ID. HVO 80ct Hawaii Volcanoes National Park. February 1969 eruption of Kilauea Volcano. Slump at the edge of Alae Crater has split Chain of Craters Road. Photo by D.A. Swanson, February 28, 1969. #1:/Hawaii Volcanoes National Park/hvo00081 ID. HVO 81ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Chain of Craters Road disrupted by a slump at the edge of Alae Crater. Photo by D.A. Swanson, March 22, 1969. #1:/Hawaii Volcanoes National Park/hvo00082 ID. HVO 82ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Slump at the edge of Alae Crater on Chain of Craters road. Photo by D.A. Swanson, June 29, 1969. #1:/Hawaii Volcanoes National Park/hvo00083 ID. HVO 83ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Mauna Ulu dead end; lava flow across the road. June 1969. #1:/Hawaii Volcanoes National Park/hvo00084 ID. HVO 84ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Mauna Ulu east vent between Aloi Crater and Alae Crater. Photo by D.A. Swanson, July 1969. #1:/Hawaii Volcanoes National Park/hvo00085 ID. HVO 85ct Hawaii Volcanoes National Park. February 1969 eruption of Kilauea Volcano. Lava fall/cascades into Alae Crater from the southwest corner. Photo by J. Judd, March 22, 1969. #1:/Hawaii Volcanoes National Park/hvo00086 ID. HVO 86ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Mauna Ulu fountain, viewed from Puu Huluhulu. Photo by D.A. Swanson, 07:00 a.m., August 22, 1969. #1:/Hawaii Volcanoes National Park/hvo00087 ID. HVO 87ct Hawaii Volcanoes National Park. Scientist dry tilting at Mauna Ulu. Photo by D.A. Swanson, August 23, 1969. #1:/Hawaii Volcanoes National Park/hvo00088 ID. HVO 88ct Hawaii Volcanoes National Park. Dallas Jackson dry tilting at Mauna Ulu. Photo by D.A. Swanson, August 23, 1969. #1:/Hawaii Volcanoes National Park/hvo00089 ID. HVO 89ct Hawaii Volcanoes National Park. Geologist holds up spatter and Pele's hair from the east rift zone of Kilauea Volcano. Photo by D.A. Swanson, September 6, 1969. #1:/Hawaii Volcanoes National Park/hvo00091 ID. HVO 91ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Mauna Ulu fountain. Photo by D.A. Swanson, September 6, 1969. #1:/Hawaii Volcanoes National Park/hvo00092 ID. HVO 92ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Mauna Ulu fountain. Photo by D.A. Swanson, September 6, 1969. #1:/Hawaii Volcanoes National Park/hvo00093 ID. HVO 93ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Mauna Ulu fountain. Photo by D.A. Swanson, September 6, 1969. #1:/Hawaii Volcanoes National Park/hvo00094 ID. HVO 94ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Mauna Ulu dome fountain (artesian type), 50 to 75 meters in height. Photo by J.B. Judd, October 11, 1969. #1:/Hawaii Volcanoes National Park/hvo00096 ID. HVO 96ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Mauna Ulu fountain flow into Alae Crater(?). Photo by D.A. Swanson, October 20, 1969. #1:/Hawaii Volcanoes National Park/hvo00100 ID. HVO 100ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Mauna Ulu, a drainback into the east vent, and a fountain partially visible at the right. Photo by D.A. Swanson, October 20, 1969. #1:/Hawaii Volcanoes National Park/hvo00102 ID. HVO 102ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Major drainback with production of black ash; cooler crust of the flow draining back into the vent and re-ejected (elapsed time = 34 minutes). Photo by D.A. Swanson, October 20, 1969. Photos hvo00102, hvo00103, and hvo00104 form a sequence. #1:/Hawaii Volcanoes National Park/hvo00103 ID. HVO 103ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Major drainback with production of black ash; cooler crust of the flow draining back into the vent and re-ejected (elapsed time = 34 minutes). Photo by D.A. Swanson, October 20, 1969. Photos hvo00102, hvo00103, and hvo00104 form a sequence. #1:/Hawaii Volcanoes National Park/hvo00104 ID. HVO 104ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Major drainback with production of black ash; cooler crust of the flow draining back into the vent and re-ejected (elapsed time = 34 minutes). Photo by D.A. Swanson, October 20, 1969. Photos hvo00102, hvo00103, and hvo00104 form a sequence. #1:/Kaoiki, Hawaii, Earthquake November 16, 1983/hvob0108 ID. HVO 108 Kaoiki, Hawaii, Earthquake November 16, 1983. Displaced post-and-pier house support. In this type of construction, two concrete blocks form a pier and a vertical wooden 10 by 10 centimeter post supports the house. The larger block rests on the ground; the smaller is placed on top of this and usually not connected to it. Between the upper block and the post is a termite shield of thin metal. At this locality, both post and upper foundation block have moved several centimeters to the right on their respective supports. Photo by J.M. Buchanan-Banks, 1983. Figure 44.3, U.S. Geological Survey Professional Paper 1350. #1:/Kaoiki, Hawaii, Earthquake November 16, 1983/hvob0109 ID. HVO 109 Kaoiki, Hawaii, Earthquake November 16, 1983. Damage to a wood-frame house with post-and-pier construction in Wood Valley. The northeast corner post fractured where the anchor bolts connected it to a half a centimeter-thick steel plate positioned on the southwest side of the post (away from the viewer). The concrete foundation block appears to have been poured as a single unit around the steel plate. The post also was torn loose from the house and from diagonal bracing when ground, pier, and post moved southeastward. Photo by E.T. Endo, 1983. Figure 44.5-A, U.S. Geological Survey Professional Paper 1350. #1:/Hawaii Volcanoes National Park/hvo00110 ID. HVO 110ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Aloi Crater to the right. Photo by D.A. Swanson, 2:45 p.m., October 20, 1969. #1:/Kaoiki, Hawaii, Earthquake November 16, 1983/hvo00111 ID. HVO 111 Kaoiki, Hawaii, Earthquake November 16, 1983. This house on Kapapala Ranch, about 12 kilometers east of the epicenter, was displaced eight-tenths of a meter northeastward. Most supporting posts remained vertical, but those used to frame a basement room were tilted. Concrete foundation piers are partly obscured by grass, behind the figure in the dark jacket. Windows broken during the earthquake are covered with plastic. Near the clump of trees on the hill behind the house, small soil slips can be seen and broken branches strew the ground. Photo by J.M. Buchanan-Banks, 1983. Figure 44.7, U.S. Geological Survey Professional Paper 1350. #1:/Hawaii Volcanoes National Park/hvo00112 ID. HVO 112ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Jeff Judd with a large spatter clot at Mauna Ulu. Photo by D.A. Swanson, 4:30 p.m., November 9, 1969. #1:/Kaoiki, Hawaii, Earthquake November 16, 1983/hvo00113 ID. HVO 113 Kaoiki, Hawaii, Earthquake November 16, 1983. North corner pier of a damaged two-story frame house in the Volcano Golf and Country Club Subdivision. Although the house is now 1.2 meters southwest of its foundation, rebar protruding through the piers is still straight. The termite shield from a top pier can be seen on the ground. The house subfloor was originally 1 meter above ground, but most supporting posts collapsed. Photo by J.M. Buchanan- Banks, 1983. Figure 44.9, U.S. Geological Survey Professional Paper 1350. #1:/Kaoiki, Hawaii, Earthquake November 16, 1983/hvob0114 ID. HVO 114 Kaoiki, Hawaii, Earthquake November 16, 1983. Damaged frame house in the Volcano Golf and Country Club Subdivision. The house has a post-and-pier foundation and the attached garage a concrete foundation. The house moved farther than the garage, breaking a 10 by 10 centimeter upright and causing a tear in the southwest wall at the electric meter. Photo by R.Y. Hanatani, 1983. Figure 44.10-A, U.S. Geological Survey Professional Paper 1350. #1:/Kaoiki, Hawaii, Earthquake November 16, 1983/hvo00115 ID. HVO 115 Kaoiki, Hawaii, Earthquake November 16, 1983. Damaged frame house in the Volcano Golf and Country Club Subdivision. Detailed view of the right side of the house is shown in photo hvo00114. To the right of the drainpipe, a supporting post can be seen resting on the ground southwest of the pier on which it originally stood. Photo by J.B. Stokes, 1983. Figure 44.10-B, U.S. Geological Survey Professional Paper 1350. #1:/Hawaii Volcanoes National Park/hvo00116 ID. HVO 116ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Aloi cascade with geologists in the foreground. Mauna Ulu fountain in the distance. Photo by J.B. Judd, December 30, 1969. #1:/Kaoiki, Hawaii, Earthquake November 16, 1983/hvo00118 ID. HVO 118 Kaoiki, Hawaii, Earthquake November 16, 1983. Barn-like three-story-high frame house in Puna District that was moved off its foundation about three-tenths of a meter toward the northeast. The 14 by 14-centimeter wooden post was sheared by rebar that extended from the base of the footing upward into the post as much as 11 centimeters. Most of the other posts supporting the upper story were similarly sheared. The house has been replaced on piers. Photo by J.M. Buchanan-Banks, 1983. Figure 44.12-B, U.S. Geological Survey Professional Paper 1350. #1:/Hawaii Volcanoes National Park/hvo00119 ID. HVO 119ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Cascade and fountain into Aloi Crater. Photo by D.A. Swanson, December 30, 1969. #1:/Hawaii Volcanoes National Park/hvo00120 ID. HVO 120ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Mauna Ulu fountain. Photo by D.A. Swanson, December 30, 1969. #1:/Kaoiki, Hawaii, Earthquake November 16, 1983/hvo00121 ID. HVO 121 Kaoiki, Hawaii, Earthquake November 16, 1983. Damage to houses in South Hilo District. Wood braces have been emplaced to prevent the second story of this house from moving farther down slope. The broken and twisted drain pipe gives an indication of the amount of distortion this house has undergone. Photo by J.M. Buchanan-Banks, 1983. Figure 44.16-A, U.S. Geological Survey Professional Paper 1350. #1:/Kaoiki, Hawaii, Earthquake November 16, 1983/hvo00123 ID. HVO 123 Kaoiki, Hawaii, Earthquake November 16, 1983. Damaged commercial building in the old part of Hilo. The side wall separated from the main structure, leaving a gap at roof level of about 21 centimeters. Photo by J.M. Buchanan-Banks, 1983. Figure 44.17, U.S. Geological Survey Professional Paper 1350. #1:/Kaoiki, Hawaii, Earthquake November 16, 1983/hvo00124 ID. HVO 124 Kaoiki, Hawaii, Earthquake November 16, 1983. Apartment building in Hilo. View along two-thirds of the length of the building was difficult to photograph because of the steep slope down to the left. Cracked cinder block can be seen between most of windows of the first and second floors; less structural damage is apparent on the third floor. Photo by J.M. Buchanan-Banks. 1983. Figure 44.18-A, U.S. Geological Survey Professional Paper 1350. #1:/Hawaii Volcanoes National Park/hvo00125 ID. HVO 125ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Puu Huluhulu, with Mauna Ulu fountain about 1500 feet high in the background. Photo by H. Schmincke, December 30, 1969. #1:/Hawaii Volcanoes National Park/hvo00126 ID. HVO 126ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Puu Huluhulu, with Mauna Ulu fountain about 1500 feet high in the background. Photo by H. Schmincke, December 30, 1969. #1:/Hawaii Volcanoes National Park/hvo00127 ID. HVO 127ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Mauna Ulu fountains. Photo by H. Schmincke, December 30, 1969. #1:/Hawaii Volcanoes National Park/hvo00128 ID. HVO 128ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Mauna Ulu fountains. Photo by H. Schmincke, December 30, 1969. #1:/Hawaii Volcanoes National Park/hvo00129 ID. HVO 129ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Sulfurous cone at Mauna Ulu. Note differences in sublimates. Photo by J.B. Judd, January 1970. #1:/Hawaii Volcanoes National Park/hvo00130 ID. HVO 130ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Dome fountain at Mauna Ulu main vent. Photo by J.B. Judd, April 26, 1970. #1:/Hawaii Volcanoes National Park/hvo00131 ID. HVO 131ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Hornito in Aloi Crater, approximately 5 feet wide and 3 feet high. Photo by J.B. Judd, May 20, 1970. #1:/Hawaii Volcanoes National Park/hvo00132 ID. HVO 132ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Sulfurous vents. Photo by D.A. Swanson, May 21, 1970. #1:/Hawaii Volcanoes National Park/hvo00133 ID. HVO 133ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Spatter chimney at Aloi Crater. Photo by D.A. Swanson, May 21, 1970. #1:/Kaoiki, Hawaii, Earthquake November 16, 1983/hvo00134 ID. HVO 134 Kaoiki, Hawaii, Earthquake November 16, 1983. Details of failure of Waldron Ledge landslide. View is southeast at head scarp of landslide and of parallel graben on the other side of the road. Headwall scarp was approximately 14 meters high and 30 meters long. The landslide removed an 11-meter-wide section of road and trail. Photo by J.M. Buchanan-Banks, 1983. Figure 44.24- A, U.S. Geological Survey Professional Paper 1350. #1:/Kaoiki, Hawaii, Earthquake November 16, 1983/hvo00135 ID. HVO 135 Kaoiki, Hawaii, Earthquake November 16, 1983. Details of failure of Waldron Ledge landslide. View downward from the road of the jumbled mass of rock resulting from disintegration of the slide block; the mass did not travel far from the base of the cliff. Photo by J.M. Buchanan-Banks. 1983. Figure 44.24- B, U.S. Geological Survey Professional Paper 1350. #1:/Hawaii Volcanoes National Park/hvo00136 ID. HVO 136ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Two dome fountains at Mauna Ulu. Photo by D.A. Swanson, June 29, 1970. #1:/Kaoiki, Hawaii, Earthquake November 16, 1983/hvo00137 ID. HVO 137 Kaoiki, Hawaii, Earthquake November 16, 1983. Arcuate road crack along Kaumana Drive. The ground slopes downward to the right. Houses were structurally damaged, and a water main was broken in an area just out of view on the left. Photo by J.M. Buchanan-Banks, 1983. Figure 44.28, U.S. Geological Survey Professional Paper 1350. #1:/Hawaii Volcanoes National Park/hvo00138 ID. HVO 138ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Coconut grove near Kahue Point after being surrounded by lava. Photo by D.W. Peterson, #1:35 p.m., September 21, 1970. #1:/Hawaii Volcanoes National Park/hvo00139 ID. HVO 139ct Hawaii Volcanoes National Park. Pele's hair formed by turbulence in lava stream southeast of Mauna Ulu. Photo by D.W. Peterson, September 25, 1970. #1:/Hawaii Volcanoes National Park/hvo00140 ID. HVO 140ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Fountains arching from vents on the east flank of Mauna Ulu. Photo by D.W. Peterson, 3:24 p.m., October 15, 1970. Photos hvo00140, hvo00141, hvo00142, and hvo00143 form a sequence. #1:/Hawaii Volcanoes National Park/hvo00141 ID. HVO 141ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Fountains arching from vents on the east flank of Mauna Ulu. Photo by D.W. Peterson, 3:24 p.m., October 15, 1970. Photos hvo00140, hvo00141, hvo00142, and hvo00143 form a sequence. #1:/Hawaii Volcanoes National Park/hvo00142 ID. HVO 142ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Fountains arching from vents on the east flank of Mauna Ulu. Photo by D.W. Peterson, 3:24 p.m., October 15, 1970. Photos hvo00140, hvo00141, hvo00142, and hvo00143 form a sequence. #1:/Hawaii Volcanoes National Park/hvo00143 ID. HVO 143ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Fountains arching from vents on the east flank of Mauna Ulu. Photo by D.W. Peterson, 3:24 p.m., October 15, 1970. Photos hvo00140, hvo00141, hvo00142, and hvo00143 form a sequence. #1:/Hawaii Volcanoes National Park/hvo00144 ID. HVO 144ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Roofed lava tube. Note the ledges within the tube, indicating different levels of flows. Photo by J.B. Judd, October 21, 1970. #1:/Hawaii Volcanoes National Park/hvo00145 ID. HVO 145ct Hawaii Volcanoes National Park. Pele's hair from the south side of Mauna Ulu summit. Photo by D.W. Peterson, November 17, 1970. #1:/Hawaii Volcanoes National Park/hvo00146 ID. HVO 146ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Upper pit crater overflowing to the north. Note the popping gas bubbles. Photo by D.A. Swanson, December 1970. #1:/Hawaii Volcanoes National Park/hvo00147 ID. HVO 147ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Lava river at Mauna Ulu. Photo by D.W. Peterson, December 3, 1970. #1:/Hawaii Volcanoes National Park/hvo00148 ID. HVO 148ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Lava stream at Mauna Ulu. December 1970. #1:/Hawaii Volcanoes National Park/hvo00150 ID. HVO 150ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Dome fountain near Aloi Crater. Photo by D.A. Swanson, January 29, 1971. #1:/Hawaii Volcanoes National Park/hvo00151 ID. HVO 151ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. 1969 lava fountains advancing into a pumice field. Photo by D.W. Peterson, January 29, 1971. #1:/Hawaii Volcanoes National Park/hvo00153 ID. HVO 153ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Whirlwind over an active flow surface southwest of Mauna Ulu. Photo by D.W. Peterson, January 30, 1971. #1:/Hawaii Volcanoes National Park/hvo00154 ID. HVO 154ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Terminal end of flat lava crust at Mauna Ulu being slid over older lava by still-moving material below the crust. Photo by D.W. Peterson, February 3, 1971. #1:/Hawaii Volcanoes National Park/hvo00156 ID. HVO 156ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. New flows across Chain of Craters Road. Photo by D.A. Swanson, February 15, 1971. #1:/Hawaii Volcanoes National Park/hvo00159 ID. HVO 159ct Hawaii Volcanoes National Park. Summit of Mauna Kea Volcano, viewed from the southwest. Photo by D.A. Swanson, February 15, 1971. #1:/Hawaii Volcanoes National Park/hvo00160 ID. HVO 160ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. New lava flows across Chain of Craters Road just west of Naulu Forest, visible in the lower right. Photo by D.A. Swanson, February 20(?), 1971. #1:/Hawaii Volcanoes National Park/hvo00161 ID. HVO 161ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Aa flows at the base of Holei Pali. Photo by D.W. Peterson, February 28, 1971. #1:/Hawaii Volcanoes National Park/hvo00162 ID. HVO 162ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Explosion at a lava tube entrance into the sea. Photo by D.W. Peterson, April 12, 1971. #1:/Hawaii Volcanoes National Park/hvo00163 ID. HVO 163ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Spatter from explosion of lava at the shore. Photo by D.W. Peterson, April 12, 1971. #1:/Hawaii Volcanoes National Park/hvo00166 ID. HVO 166ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Rafted pahoehoe plates; last puka filling up (exit tube apparently not yet operating very well) at Mauna Ulu. Photo by D.W. Peterson, February 7, 1972. #1:/Hawaii Volcanoes National Park/hvo00167 ID. HVO 167ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Mauna Ulu summit cascade into a fissure trough after the subsidence of lava in a trench, with the opening of a tube to Alae Crater. Photo by R.L. Christiansen, February 7, 1972. #1:/Hawaii Volcanoes National Park/hvo00168 ID. HVO 168ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano.D.W. Peterson collecting pahoehoe flowing into a crack at the south side of Alae Crater subsidence bowl. Photo by R.L. Christiansen, February 12, 1972. #1:/Hawaii Volcanoes National Park/hvo00169 ID. HVO 169ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Mauna Ulu lava cascading from a lake into a subterranean lava stream in a large tube. Photo by R.T. Holcomb, February 12, 1972. #1:/Hawaii Volcanoes National Park/hvo00170 ID. HVO 170ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Scientist collecting pahoehoe on the south side of Alae Crater subsidence bowl. Photo by R.L. Christiansen, February 12, 1972. #1:/Hawaii Volcanoes National Park/hvo00171 ID. HVO 171ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Scientist collecting live lava samples with a ladle on the north side of Mauna Ulu trench. Photo by D.W. Peterson, February 26, 1972. #1:/Hawaii Volcanoes National Park/hvo00172 ID. HVO 172ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Lava exploding at Mauna Ulu vent A. Photo by D.W. Peterson, February 27, 1972. #1:/Hawaii Volcanoes National Park/hvo00173 ID. HVO 173ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Lava river northeast of Mauna Ulu. Photo by D.W Peterson, February 28, 1972. #1:/Hawaii Volcanoes National Park/hvo00176 ID. HVO 176ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. East to an overflow from a trench into the main Mauna Ulu crater. "Snow" is fume coming off February cone. Photo by R.T. Holcomb, March 5, 1972. #1:/Hawaii Volcanoes National Park/hvo00177 ID. HVO 177ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Northwest to a fissure trough and the new pumice cone of Mauna Ulu. The main crater is at the upper left. Photo by R.L. Christiansen, March 10, 1972. #1:/Hawaii Volcanoes National Park/hvo00183 ID. HVO 183ct Hawaii Volcanoes National Park. Delicate lava stalactites from a 1971 tube in the Mauna Ulu Crater area. Photo by D.W. Peterson, April 4, 1972. #1:/Hawaii Volcanoes National Park/hvo00184 ID. HVO 184ct Hawaii Volcanoes National Park. Delicate lava stalactites from a 1971 tube in the Mauna Ulu Crater area. Photo by D.W. Peterson, April 4, 1972. #1:/Hawaii Volcanoes National Park/hvo00186 ID. HVO 186ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Spatter cone or spire at the upper vent on the north end of Alae Crater. View is southwest. Photo by R.L. Christiansen, April 7, 1972. #1:/Hawaii Volcanoes National Park/hvo00187 ID. HVO 187ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Squeeze-out from aa front west of Alae Crater. Photo by R.L. Christiansen, April 14, 1972. #1:/Hawaii Volcanoes National Park/hvo00190 ID. HVO 190ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Sublimates along a glowing crack north of Alae lava lake. Photo by R.L. Christiansen, April 25, 1972. #1:/Hawaii Volcanoes National Park/hvo00193 ID. HVO 193ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Flow over the west rim of Makaopuhi Crater, viewed from the mezzanine. Photo by R.L. Christiansen, June 30, 1972. #1:/Hawaii Volcanoes National Park/hvo00195 ID. HVO 195ct Hawaii Volcanoes National Park. Pele's hair covering the ground at the west end of Mauna Ulu crater. Photo by D.W. Peterson, July 31, 1972. #1:/Hawaii Volcanoes National Park/hvo00197 ID. HVO 197ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Rockslide in motion on the northern lava cone at Makaopuhi Crater. Photo by R.T. Holcomb, August 10, 1972. #1:/Hawaii Volcanoes National Park/hvo00203 ID. HVO 203ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Skylight in lava tube feeding Kaena Point flow. Photo by D.W. Peterson, September 1, 1972. #1:/Hawaii Volcanoes National Park/hvo00208 ID. HVO 208ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Lava design at Mauna Ulu. Photo by D.W. Peterson, September 4, 1972. #1:/Hawaii Volcanoes National Park/hvo00209 ID. HVO 209ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Lava developing a crust in a flow from Mauna Ulu vent C toward Alae Crater. Photo by D.W. Peterson, September 4, 1972. #1:/Hawaii Volcanoes National Park/hvo00210 ID. HVO 210ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Lava developing a crust in a flow from Mauna Ulu vent C toward Alae Crater. Photo by D.W. Peterson, September 4, 1972. #1:/Hawaii Volcanoes National Park/hvo00211 ID. HVO 211ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Lava stream from Mauna Ulu vent C into Alae Crater. Photo by D.W. Peterson, September 4, 1972. #1:/Hawaii Volcanoes National Park/hvo00214 ID. HVO 214ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Lava entering the sea at Kaena Point. Photo by D.W. Peterson, September 17, 1972. #1:/Hawaii Volcanoes National Park/hvo00215 ID. HVO 215ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Lava from Mauna Ulu entering the sea at the bay between Kaena Point and Kealakomo. Photo by D.W. Peterson, September 17, 1972. #1:/Hawaii Volcanoes National Park/hvo00216 ID. HVO 216ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Hot pahoehoe on a new black sand beach near Kaena Point. The main flow enters the sea in the background. Steam is visible at both locations. Photo by R.L. Christiansen, October 11, 1972. #1:/Hawaii Volcanoes National Park/hvo00217 ID. HVO 217ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Island of an uptilted slab surrounded by a black sand beach. Photo by R.I. Tilling, October 11, 1972. #1:/Hawaii Volcanoes National Park/hvo00218 ID. HVO 218ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Advancing pahoehoe toes on black sand at Kaena Point. Photo by D.W. Peterson, October 11, 1972. #1:/Hawaii Volcanoes National Park/hvo00221 ID. HVO 221ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Active, ropy pahoehoe on the south-southwest flank of Alae Crater. Photo by D.W. Peterson, December 14, 1972. #1:/Hawaii Volcanoes National Park/hvo00222 ID. HVO 222ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Hornito in Alae Crater. Photo by D.W. Peterson, December 20, 1972. #1:/Hawaii Volcanoes National Park/hvo00224 ID. HVO 224ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Two geologists near a small hornito at Mauna Ulu. Photo by D.W. Peterson, December 20, 1972. #1:/Hawaii Volcanoes National Park/hvo00230 ID. HVO 230ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano.R.I. Tilling sampling aa lava at Mauna Ulu. Photo by R.L. Christiansen, January 9, 1973. #1:/Hawaii Volcanoes National Park/hvo00232 ID. HVO 232ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Skylight over lava flow at Mauna Ulu. Photo by D.W. Peterson, January 26, 1973. #1:/Hawaii Volcanoes National Park/hvo00234 ID. HVO 234ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Hornitos at Mauna Ulu. Photo by D.W. Peterson, January 26, 1973. #1:/Hawaii Volcanoes National Park/hvo00235 ID. HVO 235ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano.D.W. Peterson plumbing a lava tube at Mauna Ulu. Photo by R.I. Tilling, January 30, 1973. #1:/Hawaii Volcanoes National Park/hvo00240 ID. HVO 240ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano.M. Sako at tube skylight at Mauna Ulu. Photo by R.T. Holcomb, February 2, 1973. #1:/Hawaii Volcanoes National Park/hvo00244 ID. HVO 244ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. P72 skylight at Mauna Ulu. Photo by D.W. Peterson, February 7, 1973. #1:/Hawaii Volcanoes National Park/hvo00247 ID. HVO 247ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano.D.W. Peterson and R. McLearn plumbing a lava tube northeast of Alae Crater. Photo by R.L. Christiansen, February 7, 1973. #1:/Hawaii Volcanoes National Park/hvo00250 ID. HVO 250ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano.K. Honma with a portable seismometer at Apua Point. Photo by D.W. Peterson, February 8, 1973. #1:/Hawaii Volcanoes National Park/hvo00254 ID. HVO 254ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. "Kipuka" of beach boulders west of Apua Point. Photo by R.L. Christiansen, April 10, 1973. #1:/Hawaii Volcanoes National Park/hvo00255 ID. HVO 255ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Lava entering the sea west of Apua Point. Photo by R.L. Christiansen, April 10, 1973. #1:/Hawaii Volcanoes National Park/hvo00256 ID. HVO 256ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Littoral explosion of lava west of Apua Point. Photo by R.L. Christiansen, April 10, 1973. #1:/Hawaii Volcanoes National Park/hvo00261 ID. HVO 261ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Lava enters the sea west of Apua Point. Photo by R.L. Christiansen, April 10, 1973. #1:/Hawaii Volcanoes National Park/hvo00264 ID. HVO 264ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Active lava front entering the sea west of Apua Point. Photo by R.L. Christiansen, April 12, 1973. #1:/Hawaii Volcanoes National Park/hvo00269 ID. HVO 269ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Fountain along the base of the west wall of Pauahi Crater. Photo by D.W. Peterson, May 5, 1973. #1:/Hawaii Volcanoes National Park/hvo00271 ID. HVO 271ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Lava flow crossing Chain of Craters Road south of Hiiaka Crater. Photo by D.W. Peterson, May 5, 1973. #1:/Hawaii Volcanoes National Park/hvo00272 ID. HVO 272ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Fountains in the west end of Pauahi Crater. Photo by R.L. Christiansen, May 5, 1973. #1:/Hawaii Volcanoes National Park/hvo00274 ID. HVO 274ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Lava flow crossing Chain of Craters Road from the west toward Hiiaka Crater. Photo by R.L. Christiansen, May 5, 1973. #1:/Hawaii Volcanoes National Park/hvo00277 ID. HVO 277ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Lava spatter in a tree. Noisy degassing fissure about 200 meters west of Hilina Pali. Photo by D.W. Peterson, May 5, 1973. #1:/Hawaii Volcanoes National Park/hvo00278 ID. HVO 278ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Lava engulfing trees at Hiiaka Crater. Photo by R.I. Tilling, May 5, 1973. #1:/Hawaii Volcanoes National Park/hvo00280 ID. HVO 280ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. West end of Mauna Ulu crater. Note tube. Photo by D.W. Peterson, May 21, 1973. #1:/Hawaii Volcanoes National Park/hvo00282 ID. HVO 282ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Epimagma island surrounded by an active lava lake at Mauna Ulu. Photo by D.W. Peterson, July 3, 1973. #1:/Hawaii Volcanoes National Park/hvo00283 ID. HVO 283ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. R. Okamura and K. Honma with equipment at the August 14, 1971 fumarole. Photo by R.L. Christiansen, August 27, 1973. #1:/Hawaii Volcanoes National Park/hvo00286 ID. HVO 286ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Mauna Ulu fountain, viewed from the north rim. Photo by R.T. Holcomb, November 4, 1973. #1:/Hawaii Volcanoes National Park/hvo00289 ID. HVO 289ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano.K. Honma offering leis of carnation, maile, and ilima to Pele on the west flank of Mauna Ulu near active flows. Photo by R.T. Holcomb, November 7, 1973. #1:/Hawaii Volcanoes National Park/hvo00292 ID. HVO 292ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Clockwise rotation of the lava lake in the west pit of Pauahi Crater. Photo by R.I. Tilling, November 11, 1973. #1:/Hawaii Volcanoes National Park/hvo00295 ID. HVO 295ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Lava tree at Pauahi Crater. Photo by R.I. Tilling, November 12, 1973. #1:/Hawaii Volcanoes National Park/hvo00296 ID. HVO 296ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. November 1973 fissure at Pauahi Crater. Photo by R. Greeley, November 15, 1973. #1:/Hawaii Volcanoes National Park/hvo00298 ID. HVO 298ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Pahoehoe flow advancing from Mauna Ulu. Photo by R.T. Holcomb, January 25, 1974. #1:/Hawaii Volcanoes National Park/hvo00307 ID. HVO 307ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Mauna Ulu steam plume. Photo by R.T. Holcomb, January 30, 1974. #1:/Hawaii Volcanoes National Park/hvo00308 ID. HVO 308ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Mauna Ulu at sunrise, viewed from Pauahi Crater. Photo by D.W. Peterson, February 2, 1974. #1:/Hawaii Volcanoes National Park/hvo00309 ID. HVO 309ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Spatter burst at Mauna Ulu vent. Photo by D.W. Peterson, February 6, 1974. #1:/Hawaii Volcanoes National Park/hvo00310 ID. HVO 310ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Strong, 50-meter-high burst at Mauna Ulu. Photo by D.W. Peterson, February 8, 1974. #1:/Hawaii Volcanoes National Park/hvo00311 ID. HVO 311ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Mauna Ulu lava tree molds of November 10-11, 1973, flow west of Puu Huluhulu. Photo by D.W. Peterson, February 10, 1974. #1:/Hawaii Volcanoes National Park/hvo00313 ID. HVO 313ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Mauna Ulu dome fountain. Photo by D.W. Peterson, February 15, 1974. #1:/Hawaii Volcanoes National Park/hvo00314 ID. HVO 314ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Mauna Ulu dome fountain. Photo by D.W. Peterson, February 15, 1974. #1:/Hawaii Volcanoes National Park/hvo00319 ID. HVO 319ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Arching fountain at Mauna Ulu. Photo by D.W. Peterson, March 1, 1974. #1:/Hawaii Volcanoes National Park/hvo00321 ID. HVO 321ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Roofing over of lava channel flowing south down Mauna Ulu's flank. Photo by D.W. Peterson, March 5, 1974. #1:/Hawaii Volcanoes National Park/hvo00323 ID. HVO 323ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Two scientists using an optical pyrometer at Mauna Ulu. Photo by R.T. Holcomb, March 12, 1974. #1:/Hawaii Volcanoes National Park/hvo00324 ID. HVO 324ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Geologist using an optical pyrometer above lava tube window at Mauna Ulu. Photo by R.T. Holcomb, March 12, 1974. #1:/Hawaii Volcanoes National Park/hvo00326 ID. HVO 326ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano.R.I. Tilling at collapsed lava channel at Mauna Ulu. Photo by R.T. Holcomb, March 19, 1974. #1:/Hawaii Volcanoes National Park/hvo00328 ID. HVO 328ct Hawaii Volcanoes National Park. Pele's hair from Mauna Ulu. Photo by D.W. Peterson, March 27, 1974. #1:/Hawaii Volcanoes National Park/hvo00330 ID. HVO 330ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Active pahoehoe lava at Mauna Ulu. Photo by D.W. Peterson, April 3, 1974. #1:/Hawaii Volcanoes National Park/hvo00331 ID. HVO 331ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Active pahoehoe lava at Mauna Ulu. Photo by D.W. Peterson, April 3, 1974. #1:/Hawaii Volcanoes National Park/hvo00332 ID. HVO 332ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Pahoehoe lava at Mauna Ulu. Photo by D.W. Peterson, April 3, 1974. #1:/Hawaii Volcanoes National Park/hvo00333 ID. HVO 333ct Hawaii Volcanoes National Park. 1972-1974 eruption of Kilauea Volcano. Pahoehoe lava at Mauna Ulu. Photo by D.W. Peterson, April 3, 1974. #1:/Hawaii Volcanoes National Park/hvo00340 ID. HVO 340ct Hawaii Volcanoes National Park. Map of the east rift zone of Kilauea Volcano. 1975. #1:/Hawaii Volcanoes National Park/hvo00341 ID. HVO 341ct Hawaii Volcanoes National Park. Snow-covered summit of Mauna Loa Volcano, viewed from the southwest, with several craters visible. Photo by D.W. Peterson, January 15, 1975. #1:/Hawaii Volcanoes National Park/hvo00344 ID. HVO 344ct Hawaii Volcanoes National Park. 1975 earthquake damage to Crater Rim Drive. November 25, 1975. #1:/Hawaii Volcanoes National Park/hvo00347 ID. HVO 347ct Hawaii Volcanoes National Park. Drowned palms at Halape. Photo by P.W. Lipman, December 9, 1975. See also photo hvo00348. #1:/Hawaii Volcanoes National Park/hvo00348 ID. HVO 348ct Hawaii Volcanoes National Park. Drowned palms at Halape. Photo by D. Reeser, November 15, 1976. See also photo hvo00347. #1:/Hawaii Volcanoes National Park/hvo00350 ID. HVO 350ct Hawaii Volcanoes National Park. September 1977 eruption of Kilauea Volcano. D. Dzurisin sampling vent B lava flow at Puu Kiai. September 19, 1977. #1:/Hawaii Volcanoes National Park/hvo00351 ID. HVO 351ct Hawaii Volcanoes National Park. September 1977 eruption of Kilauea Volcano. Lava coil at Puu Kiai. Photo by D. Dzurisin, September 1977. #1:/Hawaii Volcanoes National Park/hvo00353 ID. HVO 353ct Hawaii Volcanoes National Park. September 1977 eruption of Kilauea Volcano. Sunrise at vent B at Puu Kiai. September 20, 1977. #1:/Hawaii Volcanoes National Park/hvo00356 ID. HVO 356ct Hawaii Volcanoes National Park. September 1977 eruption of Kilauea Volcano. Scientist using resistivity probe on a recent lava flow at Puu Kiai. Photo by D. Dzurisin, September 20, 1977. #1:/Hawaii Volcanoes National Park/hvo00360 ID. HVO 360ct Hawaii Volcanoes National Park. September 1977 eruption of Kilauea Volcano. Scientist views Puu Kiai fountains. Photo by J.D. Griggs, September 27, 1977. #1:/Hawaii Volcanoes National Park/hvo00372 ID. HVO 372ct Hawaii Volcanoes National Park. September 1977 eruption of Kilauea Volcano. Advancing lava front. Photo by R.B. Moore, 1977. #1:/Hawaii Volcanoes National Park/hvo00375 ID. HVO 375ct Hawaii Volcanoes National Park. Smoke drum seismic record. Photo by R. Decker, November 1979. #1:/Hawaii Volcanoes National Park/hvo00379 ID. HVO 379ct Hawaii Volcanoes National Park. November 16, 1979, eruption of Kilauea Volcano. Pauahi Crater eruption. Lava fountaining along rift. Photo by R. Decker, November 16, 1979. #1:/Hawaii Volcanoes National Park/hvo00385 ID. HVO 385ct Hawaii Volcanoes National Park. November 16, 1979, eruption of Kilauea Volcano. Lava fountaining at Pauahi Crater. November 16, 1979. #1:/Hawaii Volcanoes National Park/hvo00387 ID. HVO 387ct Hawaii Volcanoes National Park. November 16, 1979, eruption of Kilauea Volcano. Lava flow from Pauahi Crater attacking gate and road. Photo by R.B Moore, November 16, 1979. #1:/Hawaii Volcanoes National Park/hvo00392 ID. HVO 392ct Hawaii Volcanoes National Park. April 1982 eruption of Kilauea Volcano. East wall of Halemaumau Crater 1.5 hours after eruption. Photo by J.P. Lockwood, April 30, 1982. #1:/Hawaii Volcanoes National Park/hvo00393 ID. HVO 393ct Hawaii Volcanoes National Park. April 1982 eruption of Kilauea Volcano. Kilauea summit. Scientist on new spatter rampart with infrared pyrometer (temperature of 1135 degrees to 1150 degrees Celsius.). April 30, 1982. #1:/Hawaii Volcanoes National Park/hvo00394 ID. HVO 394ct Hawaii Volcanoes National Park. April 1982 eruption of Kilauea Volcano. Kilauea summit. Geologist in protective suit makes thermocouple measurement in pahoehoe toe of northeast flow north of Camp A. Photo by N. Banks, April 30, 1982. #1:/Hawaii Volcanoes National Park/hvo00398 ID. HVO 398ct Hawaii Volcanoes National Park. Incandescent (tacky) basalt exposed on May 7, 1982, at the Kilauea summit at the base of a tumulus. Geologist takes thermocouple reading which registers 1126 degrees Celsius. Photo by N. Banks. #1:/Hawaii Volcanoes National Park/hvo00399 ID. HVO 399ct Hawaii Volcanoes National Park. April 1982 eruption of Kilauea Volcano. Kilauea summit. East wall of Halemaumau Crater in the foreground with spatter ramparts draping the 1968 and 1974 benches. The small 1982 flow is on the floor of the crater. 1971 spatter ramparts are at left center. Photo by E.W. Wolfe, May 1, 1982. #1:/Hawaii Volcanoes National Park/hvo00401 ID. HVO 401ct Hawaii Volcanoes National Park. Eruption of Kilauea Volcano beginning in 1983. "Curtain of fire" at a fissure in the east rift zone. Photo by J.D. Griggs, January 3, 1983. #1:/Hawaii Volcanoes National Park/hvo00407 ID. HVO 407ct Hawaii Volcanoes National Park. Eruption of Kilauea Volcano beginning in 1983. Fountaining fissure. Photo by J.D. Griggs, January 5, 1983. #1:/Hawaii Volcanoes National Park/hvo00411 ID. HVO 411ct Hawaii Volcanoes National Park. Eruption of Kilauea Volcano beginning in 1983. Lava trees and active spatter. Photo by J.D. Griggs, January 7, 1983. #1:/Hawaii Volcanoes National Park/hvo00412 ID. HVO 412ct Hawaii Volcanoes National Park. Eruption of Kilauea Volcano beginning in 1983. Geologists preparing to collect samples near an active vent erupting in the background. Photo by J.D. Griggs, January 7, 1983. #1:/Hawaii Volcanoes National Park/hvo00413 ID. HVO 413ct Hawaii Volcanoes National Park. Eruption of Kilauea Volcano beginning in 1983. Gas jets burning from recently active vents. Photo by E. Wolfe, January 14, 1983. #1:/Hawaii Volcanoes National Park/hvo00415 ID. HVO 415ct Hawaii Volcanoes National Park. Eruption of Kilauea Volcano beginning in 1983. Line of spatter cones in various stages of activity. Photo by J.D. Griggs, February 25, 1983. #1:/Hawaii Volcanoes National Park/hvo00418 ID. HVO 418ct Hawaii Volcanoes National Park. Eruption of Kilauea Volcano beginning in 1983. Geologist measuring the height of a lava fountain. Photo by J.D. Griggs, March 28, 1983. #1:/Hawaii Volcanoes National Park/hvo00419 ID. HVO 419ct Hawaii Volcanoes National Park. Eruption of Kilauea Volcano beginning in 1983. Geologist sampling lava at the edge of a pahoehoe flow. Photo by J.D. Griggs, March 28, 1983. #1:/Hawaii Volcanoes National Park/hvo00420 ID. HVO 420ct Hawaii Volcanoes National Park. Eruption of Kilauea Volcano beginning in 1983. Geologist using a laser ranging device to measure small distance changes. Photo by J.D. Griggs, March 30, 1983. #1:/Hawaii Volcanoes National Park/hvo00424 ID. HVO 424ct Hawaii Volcanoes National Park. Eruption of Kilauea Volcano beginning in 1983. Lava fountain about 1000 feet high. Photo by J.D. Griggs, April 4, 1983. #1:/Hawaii Volcanoes National Park/hvo00431 ID. HVO 431ct Hawaii Volcanoes National Park. Eruption of Kilauea Volcano beginning in 1983. Geologist obtaining a gas sample near an active vent. Note sulfur deposits. Photo by J.D. Griggs, May 6, 1983. #1:/Hawaii Volcanoes National Park/hvo00432 ID. HVO 432ct Hawaii Volcanoes National Park. Eruption of Kilauea Volcano beginning in 1983. Scientist approaching a vent for gas sampling. Photo by J.D. Griggs, May 6, 1983. #1:/Hawaii Volcanoes National Park/hvo00433 ID. HVO 433ct Hawaii Volcanoes National Park. Eruption of Kilauea Volcano beginning in 1983. Active pahoehoe lava flow. Photo by J.D. Griggs, June 13, 1983. #1:/Hawaii Volcanoes National Park/hvo00446 ID. HVO 446ct Hawaii Volcanoes National Park. Eruption of Kilauea Volcano beginning in 1983. Lava falls. Photo by J.D. Griggs, September 6, 1983. #1:/Hawaii Volcanoes National Park/hvo00447 ID. HVO 447ct Hawaii Volcanoes National Park. Eruption of Kilauea Volcano beginning in 1983. Central conduit "0" vent floor, 4 meters in diameter. Photo by T. Neal, September 23, 1983. #1:/Hawaii Volcanoes National Park/hvo00453 ID. HVO 453ct Hawaii Volcanoes National Park. Eruption of Kilauea Volcano beginning in 1983. Fountaining and lava flow from Pu'u 0. Photo by J.D. Griggs, January 31, 1984. #1:/Hawaii Volcanoes National Park/hvo00458 ID. HVO 458ct Hawaii Volcanoes National Park. Eruption of Kilauea Volcano beginning in 1983. Thermocouple measuring temperature in an active pahoehoe toe. Photo by J.D. Griggs, January 31, 1984. #1:/Hawaii Volcanoes National Park/hvo00459 ID. HVO 459ct Hawaii Volcanoes National Park. Eruption of Kilauea Volcano beginning in 1983. Geologists preparing a thermocouple for temperature measurement. Active vent in the background. Photo by J.D. Griggs, January 31, 1984. #1:/Hawaii Volcanoes National Park/hvo00466 ID. HVO 466ct Hawaii Volcanoes National Park. 1984 eruption of Mauna Loa Volcano. Fountaining at en echelon fissures. Photo by J.D. Griggs, March 25, 1984. #1:/Hawaii Volcanoes National Park/hvo00467 ID. HVO 467ct Hawaii Volcanoes National Park. 1984 eruption of Mauna Loa Volcano. Gas plume, viewed from Kilauea Volcano. Photo by J.D. Griggs, March 25, 1984. #1:/Hawaii Volcanoes National Park/hvo00468 ID. HVO 468ct Hawaii Volcanoes National Park. 1984 eruption of Mauna Loa Volcano. Main vents and spatter rampart at 9200 feet elevation at about 10:45 a.m. Photo by J.D. Griggs, March 26, 1984. #1:/Hawaii Volcanoes National Park/hvo00471 ID. HVO 471ct Hawaii Volcanoes National Park. 1984 eruption of Mauna Loa Volcano. Agglutinating spatter. Photo by J.D. Griggs, March 26, 1984. #1:/Hawaii Volcanoes National Park/hvo00472 ID. HVO 472ct Hawaii Volcanoes National Park. 1984 eruption of Mauna Loa Volcano. Helicopter delivers a geologist to the eruption site. Photo by J.D. Griggs, March 26, 1984. #1:/Hawaii Volcanoes National Park/hvo00480 ID. HVO 480ct Hawaii Volcanoes National Park. 1984 eruption of Mauna Loa Volcano. Braided lava channel flowing from the main vent to the east. Photo by J.D. Griggs, March 30, 1984. #1:/Hawaii Volcanoes National Park/hvo00482 ID. HVO 482ct Hawaii Volcanoes National Park. 1984 eruption of Mauna Loa Volcano. Standing wave in a lava flow channel. Photo by J.D. Griggs, April 2, 1984. #1:/Hawaii Volcanoes National Park/hvo00485 ID. HVO 485ct Hawaii Volcanoes National Park. 1984 eruption of Mauna Loa Volcano. Fume cloud from the main vent. Photo by J.D. Griggs, April 2, 1984. #1:/Hawaii Volcanoes National Park/hvo00488 ID. HVO 488ct Hawaii Volcanoes National Park. 1984 eruption of Mauna Loa Volcano. Main vent and spatter rampart. Photo by J.D. Griggs, April 4, 1984. #1:/Hawaii Volcanoes National Park/hvo00492 ID. HVO 492ct Hawaii Volcanoes National Park. 1984 eruption of Mauna Loa Volcano. Collecting a hot lava sample. Photo by J.D. Griggs, April 11, 1984. #1:/Hawaii Volcanoes National Park/hvo00493 ID. HVO 493ct Hawaii Volcanoes National Park. 1984 eruption of Mauna Loa Volcano. Cooling a hot lava sample by tossing it into the air. Photo by J.D. Griggs, April 11, 1984. #1:/Hawaii Volcanoes National Park/hvo00506 ID. HVO 506ct Hawaii Volcanoes National Park. Eruption of Kilauea Volcano beginning in 1983. Spectacular arching lava fountain. Photo by J.D. Griggs, February 25, 1983. #1:/Hawaii Volcanoes National Park/hvo00507 ID. HVO 507ct Hawaii Volcanoes National Park. Eruption of Kilauea Volcano beginning in 1983. Arching lava fountain. Photo by J.D. Griggs, February 25, 1983. #1:/Hawaii Volcanoes National Park/hvo00508 ID. HVO 508ct Hawaii Volcanoes National Park. Eruption of Kilauea Volcano beginning in 1983. Arching fountain. Photo by J.D. Griggs, February 25, 1983. #1:/Hawaii Volcanoes National Park/hvo00513 ID. HVO 513ct Hawaii Volcanoes National Park. Headquarters of the Hawaiian Volcano Observatory. Circa 1979. #1:/Hawaii Volcanoes National Park/hvo00514 ID. HVO 514ct Hawaii Volcanoes National Park. Thurston Lava Tube. The green tint is due to the fluorescent interior lighting. Photo by J. Dixon, September 1984. #1:/Hawaii Volcanoes National Park/hvo00517 ID. HVO 517ct Hawaii Volcanoes National Park. Analyzing gas in a lab. Photo by J.D. Griggs, 1983. #1:/Hawaii Volcanoes National Park/hvo00518 ID. HVO 518ct Hawaii Volcanoes National Park. Eruption of Kilauea Volcano beginning in 1983. Geologist taking gas samples. Photo by J.D. Griggs, 1983. #1:/Hawaii Volcanoes National Park/hvo00519 ID. HVO 519ct Hawaii Volcanoes National Park. Taking a seismic reading using equipment in the office. 1979. #1:/Hawaii Volcanoes National Park/hvo00520 ID. HVO 520ct Hawaii Volcanoes National Park. 1984 eruption of Mauna Loa Volcano. Hawaiian Volcano Observatory geologists at lava fountains. Helicopters provided access to remote areas of the eruption and were essential for safety. Photo by R.B. Moore, 1984. #1:/Kaoiki, Hawaii, Earthquake November 16, 1983/hvob0110 ID. HVO 110 Kaoiki, Hawaii, Earthquake November 16, 1983. Damage to a wood-frame house with post-and-pier construction in Wood Valley. Northwest corner post with a steel plate on the south side of the post. The half a centimeter-thick steel plate is bent at a 45 degree angle. Photo by E.T. Endo, 1983. Figure 44.5, U.S. Geological Survey Professional Paper 1350. #1:/Kaoiki, Hawaii, Earthquake November 16, 1983/hvob0116 ID. HVO 116 Kaoiki, Hawaii, Earthquake November 16, 1983. Main meeting room and library at the Hawaiian Volcano Observatory. Bookcases were torn from the back wall and fell onto the table. Storage cabinets were moved as much as half a meter. Pre-earthquake location of the cabinets is documented by dust marks on the floor behind and to the right of the plastic waste bin. Smoked-drum seismographs (obscured by easel) located under the windows on the right were temporarily out of order because their drive mechanisms jammed. Photo by J.D. Griggs, 1983. Figure 44.11, U.S. Geological Survey Professional Paper 1350. #1:/Kaoiki, Hawaii, Earthquake November 16, 1983/hvob0119 ID. HVO 119 Kaoiki, Hawaii, Earthquake November 16, 1983. Water tanks in the town of Volcano. Most water tanks here were constructed like the one standing in the right rear. The tank in the foreground has collapsed, while the other appears little damaged although displaced southwestward seven-tenths of a meter. This difference in response to the earthquake may be because of a difference in water level in the tanks at the time of the earthquake or because of a difference in age or condition of the tanks. Photo by E.T. Endo, 1983. Figure 44.13, U.S. Geological Survey Professional Paper 1350. #1:/Kaoiki, Hawaii, Earthquake November 16, 1983/hvob0120 ID. HVO 120 Kaoiki, Hawaii, Earthquake November 16, 1983. Interior of a greenhouse on Upper Wright Road leaning to the southwest after the earthquake. View is southeast. Crop loss in this area was severe because of the collapse of some greenhouses and uncovering of planted furrows. Crop shown here is tomatoes. Photo by E.T. Endo, 1983. Figure 44.14, U.S. Geological Survey Professional Paper 1350. #1:/Kaoiki, Hawaii, Earthquake November 16, 1983/hvob0125 ID. HVO 125 Kaoiki, Hawaii, Earthquake November 16, 1983. Apartment building in Hilo. Detail of damage to a part of the first floor not shown in photo hvo00124. Along the longest and widest crack, smeared texture and flaking paint indicate an old crack that had been repaired and repainted. As a result of the earthquake, there is renewed cracking along this feature as well as some new cracks through the cinder blocks. This building probably was damaged originally by the 1973 Honomu earthquake and/or by the 1975 Kalapana earthquake. Photo by J.M. Buchanan-Banks, 1983. Figure 44.18-B, U.S. Geological Survey Professional Paper 1350. #1:/Kaoiki, Hawaii, Earthquake November 16, 1983/hvob0126 ID. HVO 126 Kaoiki, Hawaii, Earthquake November 16, 1983. Apartment building in Hilo. Some blocks were broken in such a way that pieces of them protruded from block or spalled off. Photo by J.M. Buchanan-Banks, 1983. Figure 44.18-C, U.S. Geological Survey Professional Paper 1350. #1:/Kaoiki, Hawaii, Earthquake November 16, 1983/hvob0127 ID. HVO 127 Kaoiki, Hawaii, Earthquake November 16, 1983. Uwekahuna Bluff in the Kilauea caldera, viewed from Crater Rim Trail a few hours after the earthquake. Dust plumes mark rock falls that were still occurring along this section of caldera wall. The Hawaiian Volcano Observatory is just out of view on the right. Photo by J.D. Griggs, November 16, 1983. Figure 44.19, U.S. Geological Survey Professional Paper 1350. #1:/Kaoiki, Hawaii, Earthquake November 16, 1983/hvob0129 ID. HVO 129 Kaoiki, Hawaii, Earthquake November 16, 1983. Section of Crater Rim Drive at the eastern entrance to Kilauea Military Camp that collapsed along a system of cracks trending at azimuth 60 degrees. Earthquake shaking caused subsurface material to settle, thus undermining the road. Note pavement patch from the repair of earlier failure at the same place. Photo by J.M. Buchanan-Banks, 1983. Figure 44.21, U.S. Geological Survey Professional Paper 1350. #1:/Kaoiki, Hawaii, Earthquake November 16, 1983/hvob0130 ID. HVO 130 Kaoiki, Hawaii, Earthquake November 16, 1983. Compressional and extensional features where Crater Rim Drive crosses the southwest rift zone of Kilauea Volcano. The far end of this 12-centimeter high compressional fold has been collapsed by passage of a vehicle. 1983. Figure 44.22-A, U.S. Geological Survey Professional Paper 1350. #1:/Kaoiki, Hawaii, Earthquake November 16, 1983/hvob0131 ID. HVO 131 Kaoiki, Hawaii, Earthquake November 16, 1983. Compressional and extensional features where Crater Rim Drive crosses the southwest rift zone of Kilauea Volcano. An open extension crack 5 centimeters wide shows-apparent right lateral offset of about 2 centimeters and vertical offset up to the north (left) of about 1 centimeter. Photo by J.M. Buchanan-Banks, 1983. Figure 44.22-B, U.S. Geological Survey Professional Paper 1350. #1:/Kaoiki, Hawaii, Earthquake November 16, 1983/hvob0136 ID. HVO 136 Kaoiki, Hawaii, Earthquake November 16, 1983. Earthquake-produced crack across the road at the northwest entrance to Waldron Ledge Overlook. Chips of broken pavement indicate that the sides of the crack were bashed together repeatedly. Photo by J.B. Stokes, 1983. Figure 44.25, U.S. Geological Survey Professional Paper 1350. #1:/Kaoiki, Hawaii, Earthquake November 16, 1983/hvob0138 ID. HVO 138 Kaoiki, Hawaii, Earthquake November 16, 1983. Rain-induced slope failure in Laupahoehoe Gulch a few months after the earthquake. Heavy rains caused earthquake-loosened material to slide. Material below the road was pushed over by a bulldozer. The light-colored grassy area above the road to the right of the new slide lacks vegetation and indicates that the area has been the site of landslides in the past. At the time of the earthquake, a smaller rock slide occurred from the nearly vertical cliff just below the power poles (left) and blocked the highway for a few hours. Photo by N.G. Banks, 1983. Figure 44.30, U.S. Geological Survey Professional Paper 1350. #1:/Hawaii Volcanoes/hvoc0003 ID. HVO 3cp Hawaii Volcanoes. Fresh pillow basalt on the northeast rim of Loihi Volcano, a submarine volcano located southeast of the Island of Hawaii. Photograph coverage is 10 by 14 meters. Photo by A. Malahoff, University of Hawaii, 1980. Figure 6.8-C, U.S. Geological Survey Professional Paper 1350. #1:/Hawaii Volcanoes National Park/hvoc0127 ID. HVO 127cp Hawaii Volcanoes National Park. The magnitude 6.6 earthquake on November 16, 1983, caused a landslide of sections of the north rim into Kilauea caldera. Tension cracks ate at the top of the landslide. View is to the east from the northeast rim of the caldera. Page 898, U.S. Geological Survey Professional Paper 1350. #1:/Hamilton W.B. Collection/hwb00021 ID. Hamilton, W.B. 21 Syncline in weathered shale. Left limb dips gently right, right limb is vertical. Rome formation (Lower Cambrian). Highway 67, 0.5 mile south of village of (new) Butler. Johnson County, Tennessee. September 29, 1953. #1:/Great Smoky Mountains National Park/hwb00023 ID. Hamilton, W.B. 23ct Great Smoky Mountains National Park, Tennessee and North Carolina. The Sinks. May 1954. #1:/Great Smoky Mountains National Park/hwb00024 ID. Hamilton, W.B. 24ct Great Smoky Mountains National Park, Tennessee and North Carolina. Mount Le Conte and Emerts Cove. May 1954. #1:/Great Smoky Mountains National Park/hwb00026 ID. Hamilton, W.B. 26ct Great Smoky Mountains National Park, Tennessee and North Carolina. Emerts Cove and Little Pigeon River. May 1954 #1:/Great Smoky Mountains National Park/hwb00027 ID. Hamilton, W.B. 27ct Great Smoky Mountains National Park, Tennessee and North Carolina. West Prong Little Pigeon River, viewed from the bridge north of Gatlinburg. May 1954. #1:/Great Smoky Mountains National Park/hwb00032 ID. Hamilton, W.B. 32ct Great Smoky Mountains National Park, Tennessee and North Carolina. Laurel Falls. May 1954. #1:/Great Smoky Mountains National Park/hwb00041 ID. Hamilton, W.B. 41ct Great Smoky Mountains National Park, Tennessee and North Carolina. From Blanket Mountain. May 1954. Photos hwb00041 through hwb0046 form a panorama. #1:/Great Smoky Mountains National Park/hwb00042 ID. Hamilton, W.B. 42 Great Smoky Mountains National Park, Tennessee and North Carolina. From Blanket Mountain. May 1954. Photos hwb00041 through hwb0046 form a panorama. #1:/Great Smoky Mountains National Park/hwb00043 ID. Hamilton, W.B. 43 Great Smoky Mountains National Park, Tennessee and North Carolina. From Blanket Mountain. May 1954. Photos hwb00041 through hwb0046 form a panorama. #1:/Great Smoky Mountains National Park/hwb00044 ID. Hamilton, W.B. 44 Great Smoky Mountains National Park, Tennessee and North Carolina. From Blanket Mountain. May 1954. Photos hwb00041 through hwb0046 form a panorama. #1:/Great Smoky Mountains National Park/hwb00045 ID. Hamilton, W.B. 45 Great Smoky Mountains National Park, Tennessee and North Carolina. From Blanket Mountain. May 1954. Photos hwb00041 through hwb0046 form a panorama. #1:/Great Smoky Mountains National Park/hwb00046 ID. Hamilton, W.B. 46 Great Smoky Mountains National Park, Tennessee and North Carolina. From Blanket Mountain. May 1954. Photos hwb00041 through hwb0046 form a panorama. #1:/Great Smoky Mountains National Park/hwb00050 ID. Hamilton, W.B. 50ct Great Smoky Mountains National Park, Tennessee and North Carolina. Little Pigeon River and Emerts Cove. May 1954. #1:/Great Smoky Mountains National Park/hwb00055 ID. Hamilton, W.B. 55ct Great Smoky Mountains National Park, Tennessee and North Carolina. Wears Cove. January 1954. #1:/Great Smoky Mountains National Park/hwb00056 ID. Hamilton, W.B. 56ct Great Smoky Mountains National Park, Tennessee and North Carolina. Up Little River from The Sinks. January 1954. #1:/Great Smoky Mountains National Park/hwb00065 ID. Hamilton, W.B. 65ct Great Smoky Mountains National Park, Tennessee and North Carolina. The Chimneys. May 1954. #1:/Great Smoky Mountains National Park/hwb00066 ID. Hamilton, W.B. 66ct Great Smoky Mountains National Park, Tennessee and North Carolina. West Prong Little Pigeon River, viewed from Mount Le Conte. April 1953. #1:/Great Smoky Mountains National Park/hwb00068 ID. Hamilton, W.B. 68ct Great Smoky Mountains National Park, Tennessee and North Carolina. Greenbrier Pinnacle, viewed from Brushy Mountain. Thunderhead Sandstone. March 1953. #1:/Great Smoky Mountains National Park/hwb00076 ID. Hamilton, W.B. 76ct Great Smoky Mountains National Park, Tennessee and North Carolina. Little Pigeon River cascades on Roaring Fork Sandstone. 1953. #1:/Great Smoky Mountains National Park/hwb00077 ID. Hamilton, W.B. 77ct Great Smoky Mountains National Park, Tennessee and North Carolina. Abrams Falls. 1953. #1:/Great Smoky Mountains National Park/hwb00078 ID. Hamilton, W.B. 78ct Great Smoky Mountains National Park, Tennessee and North Carolina. The Chimneys. 1952. #1:/Great Smoky Mountains National Park/hwb00079 ID. Hamilton, W.B. 79ct Great Smoky Mountains National Park, Tennessee and North Carolina. Mount Le Conte, viewed from Greenbrier Pinnacle. Dip slopes of Thunderhead Sandstone. 1953. #1:/Great Smoky Mountains National Park/hwb00080 ID. Hamilton, W.B. 80ct Great Smoky Mountains National Park, Tennessee and North Carolina. The Chimneys and autumn colors. 1952. #1:/Great Smoky Mountains National Park/hwb00081 ID. Hamilton, W.B. 81ct Great Smoky Mountains National Park, Tennessee and North Carolina. Birch and spruce near Newfound Gap. 1952. #1:/Great Smoky Mountains National Park/hwb00082 ID. Hamilton, W.B. 82ct Great Smoky Mountains National Park, Tennessee and North Carolina. Snow- covered Mount Le Conte. 1954. #1:/Great Smoky Mountains National Park/hwb00083 ID. Hamilton, W.B. 83ct Great Smoky Mountains National Park, Tennessee and North Carolina. Mount Le Conte from the north. 1954 #1:/Great Smoky Mountains National Park/hwb00084 ID. Hamilton, W.B. 84ct Great Smoky Mountains National Park, Tennessee and North Carolina. Gatlinburg and Mount Le Conte. 1952. #1:/Great Smoky Mountains National Park/hwb00085 ID. Hamilton, W.B. 85ct Great Smoky Mountains National Park, Tennessee and North Carolina. Mount Le Conte, viewed from Fighting Creek Gap. 1953. #1:/Great Smoky Mountains National Park/hwb00086 ID. Hamilton, W.B. 86ct Great Smoky Mountains National Park, Tennessee and North Carolina. Mount Le Conte, Emerts, and Little Pigeon River. 1953. #1:/Great Smoky Mountains National Park/hwb00087 ID. Hamilton, W.B. 87ct Great Smoky Mountains National Park, Tennessee and North Carolina. Anakeesta Formation on The Chimneys. 1953. #1:/Great Smoky Mountains National Park/hwb00088 ID. Hamilton, W.B. 88ct Great Smoky Mountains National Park, Tennessee and North Carolina. Mount Le Conte, viewed from Fight Creek Gap. 1953. #1:/Great Smoky Mountains National Park/hwb00089 ID. Hamilton, W.B. 89ct Great Smoky Mountains National Park, Tennessee and North Carolina. Mount Le Conte across Sugarlands. 1953. #1:/Great Smoky Mountains National Park/hwb00090 ID. Hamilton, W.B. 90ct Great Smoky Mountains National Park, Tennessee and North Carolina. Greenbrier Pinnacle. 1953. #1:/Great Smoky Mountains National Park/hwb00093 ID. Hamilton, W.B. 93ct Great Smoky Mountains National Park, Tennessee and North Carolina. Virgin hardwood forest near Ramsey cascades. 1953. #1:/Great Smoky Mountains National Park/hwb00102 ID. Hamilton, W.B. 102ct Great Smoky Mountains National Park, Tennessee and North Carolina. Feathery frost crystals on branches. 1954. #1:/Great Smoky Mountains National Park/hwb00103 ID. Hamilton, W.B. 103ct Great Smoky Mountains National Park, Tennessee and North Carolina. Frosted trees near Clingmans Dome. 1954. #1:/Great Smoky Mountains National Park/hwb00105 ID. Hamilton, W.B. 105ct Great Smoky Mountains National Park, Tennessee and North Carolina. Road and snow near Clingmans Dome. 1954. #1:/Great Smoky Mountains National Park/hwb00107 ID. Hamilton, W.B. 107ct Great Smoky Mountains National Park, Tennessee and North Carolina. Small slide in north-facing cut on Tennessee Highway 73, 5.59 miles east of Gatlinburg city limits. March 1955. #1:/Great Smoky Mountains National Park/hwb00136 ID. Hamilton, W.B. 136 Great Smoky Mountains National Park, Tennessee and North Carolina. East along Greenbrier Pinnacle. 1953. #1:/Great Smoky Mountains National Park/hwb00137 ID. Hamilton, W.B. 137 Great Smoky Mountains National Park, Tennessee and North Carolina. Mount Chapman, viewed from Greenbrier Pinnacle. January 1953. #1:/Great Smoky Mountains National Park/hwb00138 ID. Hamilton, W.B. 138 Great Smoky Mountains National Park, Tennessee and North Carolina. Southwest from Greenbrier Pinnacle. January 1953. #1:/Great Smoky Mountains National Park/hwb00139 ID. Hamilton, W.B. 139 Great Smoky Mountains National Park, Tennessee and North Carolina. East from Greenbrier Pinnacle. January 1953. #1:/Great Smoky Mountains National Park/hwb00140 ID. Hamilton, W.B. 140 Great Smoky Mountains National Park, Tennessee and North Carolina. East along Greenbrier Pinnacle. January 1953. #1:/Great Smoky Mountains National Park/hwb00141 ID. Hamilton, W.B. 141 Great Smoky Mountains National Park, Tennessee and North Carolina. Eagle Rocks Branch and Mount Chapman, viewed from Greenbrier Pinnacle. January 1953. #1:/Great Smoky Mountains National Park/hwb00142 ID. Hamilton, W.B. 142 Great Smoky Mountains National Park, Tennessee and North Carolina. Chilhowee Mountain and foothills, viewed from Greenbrier Pinnacle. January 1953. #1:/Great Smoky Mountains National Park/hwb00144 ID. Hamilton, W.B. 144 Great Smoky Mountains National Park, Tennessee and North Carolina. Foothills, viewed from Greenbrier Pinnacle. January 1953. #1:/Great Smoky Mountains National Park/hwb00145 ID. Hamilton, W.B. 145 Great Smoky Mountains National Park, Tennessee and North Carolina. Webb Creek (left center), Webb Mountain, English Mountain, and foothills, viewed from Greenbrier Pinnacle. January 953. #1:/Great Smoky Mountains National Park/hwb00146 ID. Hamilton, W.B. 146 Great Smoky Mountains National Park, Tennessee and North Carolina. Foothills, viewed from Greenbrier Pinnacle. January 1953. Photos hwb00146 and hwb00147 form a panorama. #1:/Great Smoky Mountains National Park/hwb00147 ID. Hamilton, W.B. 147 Great Smoky Mountains National Park, Tennessee and North Carolina. Foothills, viewed from Greenbrier Pinnacle. January 1953. Photos hwb00146 and hwb00147 form a panorama. #1:/Great Smoky Mountains National Park/hwb00148 ID. Hamilton, W.B. 148 Great Smoky Mountains National Park, Tennessee and North Carolina. Mount LeConte, viewed from Greenbrier Pinnacle. January 1953. #1:/Great Smoky Mountains National Park/hwb00153 ID. Hamilton, W.B. 153 Great Smoky Mountains National Park, Tennessee and North Carolina. Great Smoky Mountains field party. Left to right: Richard Goldsmith, Willis Nelson, Robert H. Neuman, Jarvis B. Hadley, and Philip B. King. September 1953. #1:/Great Smoky Mountains National Park/hwb00158 ID. Hamilton, W.B. 158 Great Smoky Mountains National Park, Tennessee and North Carolina. From Brushy Mountain, left to right: Shields Mountain, Emerts Cove, Webb Mountain, English Mountain, Greenbrier Pinnacle, Mount Guyot, Mount Chapman, and Laurel Top. March 1953. Photos hwb00158 through hwb00163 form a panorama. #1:/Great Smoky Mountains National Park/hwb00159 ID. Hamilton, W.B. 159 Great Smoky Mountains National Park, Tennessee and North Carolina. From Brushy Mountain, left to right: Shields Mountain, Emerts Cove, Webb Mountain, English Mountain, Greenbrier Pinnacle, Mount Guyot, Mount Chapman, and Laurel Top. March 1953. Photos hwb00158 through hwb00163 form a panorama. #1:/Great Smoky Mountains National Park/hwb00160 ID. Hamilton, W.B. 160 Great Smoky Mountains National Park, Tennessee and North Carolina. From Brushy Mountain, left to right: Shields Mountain, Emerts Cove, Webb Mountain, English Mountain, Greenbrier Pinnacle, Mount Guyot, Mount Chapman, and Laurel Top. March 1953. Photos hwb00158 through hwb00163 form a panorama. #1:/Great Smoky Mountains National Park/hwb00161 ID. Hamilton, W.B. 161 Great Smoky Mountains National Park, Tennessee and North Carolina. From Brushy Mountain, left to right: Shields Mountain, Emerts Cove, Webb Mountain, English Mountain, Greenbrier Pinnacle, Mount Guyot, Mount Chapman, and Laurel Top. March 1953. Photos hwb00158 through hwb00163 form a panorama. #1:/Great Smoky Mountains National Park/hwb00162 ID. Hamilton, W.B. 162 Great Smoky Mountains National Park, Tennessee and North Carolina. From Brushy Mountain, left to right: Shields Mountain, Emerts Cove, Webb Mountain, English Mountain, Greenbrier Pinnacle, Mount Guyot, Mount Chapman, and Laurel Top. March 1953. Photos hwb00158 through hwb00163 form a panorama. #1:/Great Smoky Mountains National Park/hwb00163 ID. Hamilton, W.B. 163 Great Smoky Mountains National Park, Tennessee and North Carolina. From Brushy Mountain, left to right: Shields Mountain, Emerts Cove, Webb Mountain, English Mountain, Greenbrier Pinnacle, Mount Guyot, Mount Chapman, and Laurel Top. March 1953. Photos hwb00158 through hwb00163 form a panorama. #1:/Great Smoky Mountains National Park/hwb00164 ID. Hamilton, W.B. 164 Great Smoky Mountains National Park, Tennessee and North Carolina. Porters Mountain, Laurel Top, and Sawteeth, viewed from Brushy Mountain. March 1953. #1:/Great Smoky Mountains National Park/hwb00165 ID. Hamilton, W.B. 165 Great Smoky Mountains National Park, Tennessee and North Carolina. Charlie's Bunion, Porters Ridge, and Sawteeth, viewed from Brushy Mountain. March 1953. #1:/Great Smoky Mountains National Park/hwb00166 ID. Hamilton, W.B. 166 Great Smoky Mountains National Park, Tennessee and North Carolina. Alum Cave Ridge, viewed from northeast Alum Cave. Headwaters of West Prong Little Pigeon River. April 1953. #1:/Great Smoky Mountains National Park/hwb00167 ID. Hamilton, W.B. 167 Great Smoky Mountains National Park, Tennessee and North Carolina. Across the valley of West Prong Little Pigeon River, viewed from near Alum Cave. Headwaters of West Prong Little Pigeon River. April 1953. #1:/Great Smoky Mountains National Park/hwb00168 ID. Hamilton, W.B. 168 Great Smoky Mountains National Park, Tennessee and North Carolina. Down the valley from the highway near Newfound Gap. Headwaters of West Prong Little Pigeon River. April 1953. #1:/Great Smoky Mountains National Park/hwb00169 ID. Hamilton, W.B. 169 Great Smoky Mountains National Park, Tennessee and North Carolina. Up West Prong Little Pigeon River from Chimneys campground bridge. April 1953. #1:/Great Smoky Mountains National Park/hwb00170 ID. Hamilton, W.B. 170 Great Smoky Mountains National Park, Tennessee and North Carolina. The Chimneys. April 1953. #1:/Great Smoky Mountains National Park/hwb00171 ID. Hamilton, W.B. 171 Great Smoky Mountains National Park, Tennessee and North Carolina. Pigeon Siltstone and Roaring Fork Sandstone exposed in Little Pigeon River at Greenbrier Cove. April 1953. #1:/Great Smoky Mountains National Park/hwb00174 ID. Hamilton, W.B. 174 Great Smoky Mountains National Park, Tennessee and North Carolina. Little Pigeon River at Greenbrier Cove. Potholes in Pigeon Siltstone and Roaring Fork Sandstone. April 1953. #1:/Great Smoky Mountains National Park/hwb00175 ID. Hamilton, W.B. 175 Great Smoky Mountains National Park, Tennessee and North Carolina. Thomas Divide and Plott balsams from east of Clingmans Dome. View is south from Clingmans Dome road. April 1953. #1:/Great Smoky Mountains National Park/hwb00176 ID. Hamilton, W.B. 176 Great Smoky Mountains National Park, Tennessee and North Carolina. Plott balsams, Thomas Ridge, and Fork Ridge, viewed from near Mount Collins. View is south from Clingmans Dome road. April 1953. Photos hwb00176 and hwb00177 form a panorama. #1:/Great Smoky Mountains National Park/hwb00177 ID. Hamilton, W.B. 177 Great Smoky Mountains National Park, Tennessee and North Carolina. Plott balsams, Thomas Ridge, and Fork Ridge. Viewed from near Mount Collins. View is south from Clingmans Dome road. April 1953. Photos hwb00176 and hwb00177 form a panorama. #1:/Great Smoky Mountains National Park/hwb00178 ID. Hamilton, W.B. 178 Great Smoky Mountains National Park, Tennessee and North Carolina. Forney Ridge and Nantahala Mountains from Clingmans Dome. View is south from Clingmans Dome road. April 1953. Photos hwb00178, hwb00179, and hwb00180 form a panorama. #1:/Great Smoky Mountains National Park/hwb00179 ID. Hamilton, W.B. 179 Great Smoky Mountains National Park, Tennessee and North Carolina. Forney Ridge and Nantahala Mountains from Clingmans Dome. View is south from Clingmans Dome road. April 1953. Photos hwb00178, hwb00179, and hwb00180 form a panorama. #1:/Great Smoky Mountains National Park/hwb00180 ID. Hamilton, W.B. 180 Great Smoky Mountains National Park, Tennessee and North Carolina. Forney Ridge and Nantahala Mountains from Clingmans Dome. View is south from Clingmans Dome road. April 1953. Photos hwb00178, hwb00179, and hwb00180 form a panorama. #1:/Great Smoky Mountains National Park/hwb00187 ID. Hamilton, W.B. 187 Great Smoky Mountains National Park, Tennessee and North Carolina. Newfound Gap, viewed from Mount LeConte. April 1953. #1:/Great Smoky Mountains National Park/hwb00188 ID. Hamilton, W.B. 188 Great Smoky Mountains National Park, Tennessee and North Carolina. Clingmans Dome, viewed from Mount LeConte. April 1953. Photos hwb00188 and hwb00189 form a panorama. #1:/Great Smoky Mountains National Park/hwb00189 ID. Hamilton, W.B. 189 Great Smoky Mountains National Park, Tennessee and North Carolina. Clingmans Dome, viewed from Mount LeConte. April 1953. Photos hwb00188 and hwb00189 form a panorama. #1:/Great Smoky Mountains National Park/hwb00190 ID. Hamilton, W.B. 190 Great Smoky Mountains National Park, Tennessee and North Carolina. Sugarland Mountain and Balsam Point west from Mount LeConte (Cliff Tops). April 1953. Photos hwb00190 and hwb00191 form a panorama. #1:/Great Smoky Mountains National Park/hwb00191 ID. Hamilton, W.B. 191 Great Smoky Mountains National Park, Tennessee and North Carolina. Sugarland Mountain and Balsam Point west from Mount LeConte (Cliff Tops). April 1953. Photos hwb00190 and hwb00191 form a panorama. #1:/Great Smoky Mountains National Park/hwb00192 ID. Hamilton, W.B. 192 Great Smoky Mountains National Park, Tennessee and North Carolina. Chilhowee Mountain and Cove Mountain, viewed from Mount LeConte (Cliff Tops). April 1953. #1:/Great Smoky Mountains National Park/hwb00193 ID. Hamilton, W.B. 193 Great Smoky Mountains National Park, Tennessee and North Carolina. Clingmans Dome, viewed from Mount LeConte. April 1953. #1:/Great Smoky Mountains National Park/hwb00194 ID. Hamilton, W.B. 194 Great Smoky Mountains National Park, Tennessee and North Carolina. Chilhowee Mountain, viewed from Mount LeConte. April 1953. #1:/Great Smoky Mountains National Park/hwb00195 ID. Hamilton, W.B. 195 Great Smoky Mountains National Park, Tennessee and North Carolina. Little Pigeon River valley, viewed from Mount LeConte. Shields Mountain on the left. April 1953. #1:/Great Smoky Mountains National Park/hwb00198 ID. Hamilton, W.B. 198 Great Smoky Mountains National Park, Tennessee and North Carolina. Chilhowee and Shields Mountains, viewed from Mount LeConte. April 1953. Photos hwb00198 and hwb00199 form a panorama. #1:/Great Smoky Mountains National Park/hwb00199 ID. Hamilton, W.B. 199 Great Smoky Mountains National Park, Tennessee and North Carolina. Chilhowee and Shields Mountains, viewed from Mount LeConte. April 1953. Photos hwb00198 and hwb00199 form a panorama. #1:/Great Smoky Mountains National Park/hwb00200 ID. Hamilton, W.B. 200 Great Smoky Mountains National Park, Tennessee and North Carolina. From Blanket Mountain: Thunderhead, Marks Creek, Chilhowee Mountain, Wears Cove, Meigs Mountain, Cove Mountain, Little River, Mount LeConte, and Clingmans Dome. May 1953. Photos hwb00200 through hwb00209 form a panorama. #1:/Great Smoky Mountains National Park/hwb00201 ID. Hamilton, W.B. 201 Great Smoky Mountains National Park, Tennessee and North Carolina. From Blanket Mountain: Thunderhead, Marks Creek, Chilhowee Mountain, Wears Cove, Meigs Mountain, Cove Mountain, Little River, Mount LeConte, and Clingmans Dome. May 1953. Photos hwb00200 through hwb00209 form a panorama. #1:/Great Smoky Mountains National Park/hwb00202 ID. Hamilton, W.B. 202 Great Smoky Mountains National Park, Tennessee and North Carolina. From Blanket Mountain: Thunderhead, Marks Creek, Chilhowee Mountain, Wears Cove, Meigs Mountain, Cove Mountain, Little River, Mount LeConte, and Clingmans Dome. May 1953. Photos hwb00200 through hwb00209 form a panorama. #1:/Great Smoky Mountains National Park/hwb00203 ID. Hamilton, W.B. 203 Great Smoky Mountains National Park, Tennessee and North Carolina. From Blanket Mountain: Thunderhead, Marks Creek, Chilhowee Mountain, Wears Cove, Meigs Mountain, Cove Mountain, Little River, Mount LeConte, and Clingmans Dome. May 1953. Photos hwb00200 through hwb00209 form a panorama. #1:/Great Smoky Mountains National Park/hwb00204 ID. Hamilton, W.B. 204 Great Smoky Mountains National Park, Tennessee and North Carolina. From Blanket Mountain: Thunderhead, Marks Creek, Chilhowee Mountain, Wears Cove, Meigs Mountain, Cove Mountain, Little River, Mount LeConte, and Clingmans Dome. May 1953. Photos hwb00200 through hwb00209 form a panorama. #1:/Great Smoky Mountains National Park/hwb00205 ID. Hamilton, W.B. 205 Great Smoky Mountains National Park, Tennessee and North Carolina. From Blanket Mountain: Thunderhead, Marks Creek, Chilhowee Mountain, Wears Cove, Meigs Mountain, Cove Mountain, Little River, Mount LeConte, and Clingmans Dome. May 1953. Photos hwb00200 through hwb00209 form a panorama. #1:/Great Smoky Mountains National Park/hwb00206 ID. Hamilton, W.B. 206 Great Smoky Mountains National Park, Tennessee and North Carolina. From Blanket Mountain: Thunderhead, Marks Creek, Chilhowee Mountain, Wears Cove, Meigs Mountain, Cove Mountain, Little River, Mount LeConte, and Clingmans Dome. May 1953. Photos hwb00200 through hwb00209 form a panorama. #1:/Great Smoky Mountains National Park/hwb00207 ID. Hamilton, W.B. 207 Great Smoky Mountains National Park, Tennessee and North Carolina. From Blanket Mountain: Thunderhead, Marks Creek, Chilhowee Mountain, Wears Cove, Meigs Mountain, Cove Mountain, Little River, Mount LeConte, and Clingmans Dome. May 1953. Photos hwb00200 through hwb00209 form a panorama. #1:/Great Smoky Mountains National Park/hwb00208 ID. Hamilton, W.B. 208 Great Smoky Mountains National Park, Tennessee and North Carolina. From Blanket Mountain: Thunderhead, Marks Creek, Chilhowee Mountain, Wears Cove, Meigs Mountain, Cove Mountain, Little River, Mount LeConte, and Clingmans Dome. May 1953. Photos hwb00200 through hwb00209 form a panorama. #1:/Great Smoky Mountains National Park/hwb00209 ID. Hamilton, W.B. 209 Great Smoky Mountains National Park, Tennessee and North Carolina. From Blanket Mountain: Thunderhead, Marks Creek, Chilhowee Mountain, Wears Cove, Meigs Mountain, Cove Mountain, Little River, Mount LeConte, and Clingmans Dome. May 1953. Photos hwb00200 through hwb00209 form a panorama. #1:/Grand Canyon National Park/hwb00216 ID. Hamilton, W.B. 216ct Grand Canyon National Park, Arizona. Grand Canyon (pale pinks) in the morning. Northwest from Bright Angel Point. March 1948. See also photo hwb00218. #1:/Grand Canyon National Park/hwb00218 ID. Hamilton, W.B. 218ct Grand Canyon National Park, Arizona. Grand Canyon, (purples) in the morning. Northeast from Bright Angel. March 1948. See also photo hwb00216. #1:/Grand Canyon National Park/hwb00219 ID. Hamilton, W.B. 219ct Grand Canyon National Park, Arizona. Grand Canyon, viewed from Desert View. March 1948. #1:/Sunset Crater Volcano National Monument/hwb00220 ID. Hamilton, W.B. 220ct Sunset Crater Volcano National Monument, Arizona. Spatter cone. August 1951. #1:/Sunset Crater Volcano National Monument/hwb00222 ID. Hamilton, W.B. 222ct Sunset Crater Volcano National Monument, Arizona. Lava section of block floor that moved like a caterpillar tread. August 1951. #1:/Great Smoky Mountains National Park/hwb00224 ID. Hamilton, W.B. 224 Great Smoky Mountains National Park, Tennessee and North Carolina. Mount LeConte across Sugarlands. May 1953. #1:/Great Smoky Mountains National Park/hwb00231 ID. Hamilton, W.B. 231 Great Smoky Mountains National Park, Tennessee and North Carolina. Block field at Chimneys Overlook. December 1953. #1:/Petrified Forest National Park/hwb00235 ID. Hamilton, W.B. 235ct Petrified Forest National Park, Arizona. Painted Desert (Triassic mudstone). August 1951. #1:/Great Smoky Mountains National Park/hwb00236 ID. Hamilton, W.B. 236 Great Smoky Mountains National Park, Tennessee and North Carolina. Thunderhead Sandstone at Chimneys Overlook. December 1953. #1:/Great Smoky Mountains National Park/hwb00237 ID. Hamilton, W.B. 237 Great Smoky Mountains National Park, Tennessee and North Carolina. Close-up of Thunderhead Sandstone at Chimneys Overlook. December 1953. #1:/Great Smoky Mountains National Park/hwb00238 ID. Hamilton, W.B. 238 Great Smoky Mountains National Park, Tennessee and North Carolina. Thunderhead Sandstone near the highway tunnel at Chimneys Overlook. December 1953. #1:/Grand Canyon National Park/hwb00239 ID. Hamilton, W.B. 239ct Grand Canyon National Park, Arizona. Cherty limestone in the Kaibab Formation. April 1968. #1:/Saguaro National Monument/hwb00245 ID. Hamilton, W.B. 245ct Saguaro National Monument, Arizona. Saguaro cactus. January 1958. #1:/Yellowstone National Park/hwb00255 ID. Hamilton, W.B. 255ct Yellowstone National Park, Wyoming. Old Faithful Geyser in Upper Geyser Basin. #1:/Yellowstone National Park/hwb00257 ID. Hamilton, W.B. 257ct Yellowstone National Park, Wyoming. Travertine terracettes. September 1952. #1:/Yellowstone National Park/hwb00259 ID. Hamilton, W.B. 259ct Yellowstone National Park, Wyoming. Grand Canyon of the Yellowstone. September 1952. #1:/Yellowstone National Park/hwb00260 ID. Hamilton, W.B. 260ct Yellowstone National Park, Wyoming. Riverside Geyser in Upper Geyser Basin. July 1957. #1:/Yellowstone National Park/hwb00262 ID. Hamilton, W.B. 262ct Yellowstone National Park, Wyoming. Down the Grand Canyon of the Yellowstone. #1:/Canada/hwb00275 ID. Hamilton, W.B. 275ct Canada. Hanging glacier above Athabaska Glacier in Jasper National Park. July 1954. #1:/Hamilton W.B. Collection/hwb00299 ID. Hamilton, W.B. 299ct Precambrian pink pegmatite cut by fault. Eaton Canyon, San Gabriel Mountains. California. May 1951. #1:/Death Valley National Park/hwb00307 ID. Hamilton, W.B. 307ct Death Valley National Park, California. Bedded dolomite in Virgin Wash. December 1950. #1:/Hamilton W.B. Collection/hwb00310 ID. Hamilton, W.B. 310ct Slickensides on joint filling aplite. Eaton Canyon, San Gabriel Mountains. California. May 1951. #1:/Hamilton W.B. Collection/hwb00311 ID. Hamilton, W.B. 311ct Pleistocene alluvium over Miocene(?) sediments near Point Dume. Los Angeles County, California. October 1950. #1:/Hamilton W.B. Collection/hwb00312 ID. Hamilton, W.B. 312ct Small horsts and grabens in Modelo shale (Miocene). Point Dume, Los Angeles County, California. November 1950. #1:/Zion National Park/hwb00318 ID. Hamilton, W.B. 318ct Zion National Park, Utah. Mountain of the Sun, Twin Brothers, east Temple. March 1948. #1:/Bryce Canyon National Park/hwb00321 ID. Hamilton, W.B. 321ct Bryce Canyon National Park, Utah. Wasatch Formation (Eocene). June 1956. #1:/Bryce Canyon National Park/hwb00322 ID. Hamilton, W.B. 322ct Bryce Canyon National Park, Utah. Wasatch Formation (Eocene). June 1956. #1:/Idaho/hwb00375 ID. Hamilton, W.B. 375ct Idaho. Schist crinkled by slip cleavage on the Salmon River near Race Creek. June 1954. #1:/Death Valley National Park/hwb00456 ID. Hamilton, W.B. 456 Death Valley National Park, California. Southeast across Death Valley to the south end of the saltpan and mouth of the Amargosa River. Circa 1963. Figure 4, U.S. Geological Survey Professional Paper 494-A. #1:/Death Valley National Park/hwb00457 ID. Hamilton, W.B. 457 Death Valley National Park, California. Northeast across Death Valley to the Black Mountains and Funeral Mountains. Circa 1963. Figure 5, U.S. Geological Survey Professional Paper 494-A. #1:/Yellowstone National Park/hwb00460 ID. Hamilton, W.B. 460 Yellowstone National Park, Wyoming. Welded tuff, 3.5 miles southeast of West Yellowstone in the Hebgen Lake, Montana, earthquake area. Squashed-shard layering in this devitrified tuff dips 3 degrees to the right. The rock disintegrates to granular debris and forms rounded outcrops. September 1959. Figure 108, U.S. Geological Survey Professional Paper 435-S. #1:/Antarctica/hwb00530 ID. Hamilton, W.B. 530ct Antarctica. Moraine forming at the foot of Taylor Glacier in the McMurdo Sound area. December 15, 1958. #1:/Antarctica/hwb00537 ID. Hamilton, W.B. 537ct Antarctica. Valley glacier in Victoria Dry Valley in the McMurdo Sound area. November 1958. #1:/Hebgen Lake, Montana, Earthquake August 1959/hwb00573 ID. Hamilton, W.B. 573ct Hebgen Lake, Montana, Earthquake August 1959. "Quake Lake" formed by the earthquake landslide. August 1959. #1:/Yellowstone National Park/hwb00576 ID. Hamilton, W.B. 576ct Yellowstone National Park, Wyoming. Obsidian agglomerate. 1959. #1:/Yellowstone National Park/hwb00577 ID. Hamilton, W.B. 577ct Yellowstone National Park, Wyoming. Rhyolite over red beds from Mammoth Hot Springs terraces. August 1958. #1:/Great Smoky Mountains National Park/hwb00627 ID. Hamilton, W.B. 627ct Great Smoky Mountains National Park, Tennessee and North Carolina. Ridge west from Alum Cave. April 1953. #1:/Great Smoky Mountains National Park/hwb00637 ID. Hamilton, W.B. 637ct Great Smoky Mountains National Park, Tennessee and North Carolina. Road and snow near Clingmans Dome. December 1953. #1:/Australia/hwb00639 ID. Hamilton, W.B. 639ct Frosted trees in Great Smoky Mountains National Park, Tennessee, January 1953. #1:/Great Smoky Mountains National Park/hwb00640 ID. Hamilton, W.B. 640ct Clingmans Dome, road, snow. Great Smoky Mountains National Park, Tennessee and North Carolina. Janurary 1953. #1:/Great Smoky Mountains National Park/hwb00646 ID. Hamilton, W.B. 646ct Great Smoky Mountains National Park, Tennessee and North Carolina. Icicles. Circa 1954. #1:/Great Smoky Mountains National Park/hwb00653 ID. Hamilton, W.B. 653ct Great Smoky Mountains National Park, Tennessee and North Carolina. The Chimneys and highway. May 1954. #1:/Great Smoky Mountains National Park/hwb00659 ID. Hamilton, W.B. 659ct Great Smoky Mountains National Park, Tennessee and North Carolina. The Chimneys. Circa 1954. #1:/Great Smoky Mountains National Park/hwb00660 ID. Hamilton, W.B. 660ct Great Smoky Mountains National Park, Tennessee and North Carolina. South from Newfound Gap. Circa 1954. #1:/Great Smoky Mountains National Park/hwb00666 ID. Hamilton, W.B. 666ct Great Smoky Mountains National Park, Tennessee and North Carolina. Cades Cove. Circa 1954. #1:/Great Smoky Mountains National Park/hwb00667 ID. Hamilton, W.B. 667ct Great Smoky Mountains National Park, Tennessee and North Carolina. Mount Le Conte. May 1954. #1:/Great Smoky Mountains National Park/hwb00678 ID. Hamilton, W.B. 678ct Great Smoky Mountains National Park, Tennessee and North Carolina. Bullhead Sandstone at Chimneys Overlook. Circa 1954. #1:/Great Smoky Mountains National Park/hwb00690 ID. Hamilton, W.B. 690ct Great Smoky Mountains National Park, Tennessee and North Carolina. Laminated slate in the central Great Smoky Mountains. Circa 1954. #1:/Hamilton W.B. Collection/hwb00717 ID. Hamilton, W.B. 717ct Massive silt and cleavage. Little Pigeon River south of Richardson Cove. Great Smoky Mountains. Richardson Cove quadrangle, Tennessee. April 1953. #1:/Hamilton W.B. Collection/hwb00732 ID. Hamilton, W.B. 732ct Banded slate, strong cleavage. Bands altered to yellow. Long Branch, west edge of Jones Cove quadrangle. Tennessee February 1954. #1:/Great Smoky Mountains National Park/hwb00771 ID. Hamilton, W.B. 771ct Great Smoky Mountains National Park, Tennessee and North Carolina. Great Smoky Mountains near Cherokee. April 1954. #1:/Yellowstone National Park/hwb00842 ID. Hamilton, W.B. 842ct Yellowstone National Park, Wyoming. Coyote. #1:/Yellowstone National Park/hwb00844 ID. Hamilton, W.B. 844ct Yellowstone National Park, Wyoming. Buffalo. September 1959. #1:/Joshua Tree National Park/hwb00872 ID. Hamilton, W.B. 872ct Joshua Tree National Park, California.Q.M. vs. metamorphics contact and Joshua trees near Sheep Pass. March 11, 1962. #1:/Hebgen Lake, Montana, Earthquake August 1959/hwb00995 ID. Hamilton, W.B. 995ct Hebgen Lake, Montana, Earthquake August 1959. Red Canyon fault scarp east of Blarneystone Ranch. August 1959. #1:/Idaho/hwb00998 ID. Hamilton, W.B. 998ct Idaho. Cirques, Fish Creek and Sawtooth Mountains. September 1952. #1:/Hamilton W.B. Collection/hwb01006 ID. Hamilton, W.B. 1006ct Contacts of Upper Cretaceous conglomerate, at Punta China, with Quaternary alluvium, and Upper Cretaceous agglomerate. Baja California, Mexico. March 1961. #1:/Hebgen Lake, Montana, Earthquake August 1959/hwb01042 ID. Hamilton, W.B. 1042ct Hebgen Lake, Montana, Earthquake August 1959. Hebgen Lake fault scarp. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/hwb01043 ID. Hamilton, W.B. 1043ct Hebgen Lake, Montana, Earthquake August 1959. Scarp in the sand at Duck Creek. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/hwb01044 ID. Hamilton, W.B. 1044ct Hebgen Lake, Montana, Earthquake August 1959. Culligan barn collapsed by fault scarp extending from foreground through barn and across stream. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/hwb01045 ID. Hamilton, W.B. 1045ct Hebgen Lake, Montana, Earthquake August 1959. Culligan Ranch haystack upset by shaking. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/hwb01047 ID. Hamilton, W.B. 1047ct Hebgen Lake, Montana, Earthquake August 1959. Scarp and moat at Culligan's Ranch. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/hwb01049 ID. Hamilton, W.B. 1049ct Hebgen Lake, Montana, Earthquake August 1959. Scarp above Corey Spring. September 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/hwb01052 ID. Hamilton, W.B. 1052ct Hebgen Lake, Montana, Earthquake August 1959. Red Mountain scarp. September 1959. #1:/Yellowstone National Park/hwb01068 ID. Hamilton, W.B. 1068ct Yellowstone National Park, Wyoming. Grand Canyon of the Yellowstone. #1:/Yellowstone National Park/hwb01069 ID. Hamilton, W.B. 1069ct Yellowstone National Park, Wyoming. East over Yellowstone Lake. West Thumb Yellowstone Lake. #1:/Yellowstone National Park/hwb01073 ID. Hamilton, W.B. 1073ct Yellowstone National Park, Wyoming. South along the east side of Yellowstone Lake. #1:/Yellowstone National Park/hwb01079 ID. Hamilton, W.B. 1079ct Yellowstone National Park, Wyoming. Late Pleistocene obsidian sand in West Yellowstone Basin. September 1959. #1:/Yellowstone National Park/hwb01080 ID. Hamilton, W.B. 1080ct Yellowstone National Park, Wyoming. Flow-streaked obsidian agglomerate in southeast West Yellowstone. Late Quaternary rhyolite flow. September 1959. #1:/Yellowstone National Park/hwb01087 ID. Hamilton, W.B. 1087ct Yellowstone National Park, Wyoming. Mammoth Terrace. August 1958. #1:/Yellowstone National Park/hwb01089 ID. Hamilton, W.B. 1089ct Yellowstone National Park, Wyoming. Hot pool crust. September 1952. #1:/Yellowstone National Park/hwb01090 ID. Hamilton, W.B. 1090ct Yellowstone National Park, Wyoming. Long-dead trees in Hot Springs Terrace in the Mammoth Hot Springs area. August 1958. #1:/Great Smoky Mountains National Park/hwb01092 ID. Hamilton, W.B. 1092ct Great Smoky Mountains National Park, Tennessee and North Carolina. Frosted trees and frost near Newfound Gap. January 1953. #1:/Great Smoky Mountains National Park/hwb01094 ID. Hamilton, W.B. 1094ct Great Smoky Mountains National Park, Tennessee and North Carolina. Sugar maple in bloom and sandstone boulders upstream from Chimneys campground. April 1953. #1:/Great Smoky Mountains National Park/hwb01112 ID. Hamilton, W.B. 1112ct Great Smoky Mountains National Park, Tennessee and North Carolina. Park headquarters. September 1953. #1:/Great Smoky Mountains National Park/hwb01117 ID. Hamilton, W.B. 1117ct Great Smoky Mountains National Park, Tennessee and North Carolina. Stream, forest, and sandstone boulders near Chimneys campground. October 1953. #1:/Great Smoky Mountains National Park/hwb01118 ID. Hamilton, W.B. 1118ct Great Smoky Mountains National Park, Tennessee and North Carolina. The Chimneys and hills. October 1953. #1:/Great Smoky Mountains National Park/hwb01119 ID. Hamilton, W.B. 1119ct Great Smoky Mountains National Park, Tennessee and North Carolina. Mount Le Conte, viewed from Fighting Creek Gap. November 1953. #1:/Great Smoky Mountains National Park/hwb01121 ID. Hamilton, W.B. 1121ct Great Smoky Mountains National Park, Tennessee and North Carolina. Coarse Thunderhead Sandstone at Chimneys Overlook. December 1953. #1:/Great Smoky Mountains National Park/hwb01122 ID. Hamilton, W.B. 1122ct Great Smoky Mountains National Park, Tennessee and North Carolina. Snow- covered road and winter scenery near Clingmans Dome. December 1953. #1:/Great Smoky Mountains National Park/hwb01125 ID. Hamilton, W.B. 1125ct Great Smoky Mountains National Park, Tennessee and North Carolina. Cochron Formations (white quartzite) on Little River. Lower Cambrian. January 1954. #1:/Great Smoky Mountains National Park/hwb01126 ID. Hamilton, W.B. 1126ct Great Smoky Mountains National Park, Tennessee and North Carolina. Thrust- faulted cliff at Tuckaleechee Cove. January 1954. #1:/Great Smoky Mountains National Park/hwb01127 ID. Hamilton, W.B. 1127ct Great Smoky Mountains National Park, Tennessee and North Carolina. Nichols shale (sandy silt, no cleavage) on Little River. Chihowee Group, Lower Cambrian. January 1954. #1:/Great Smoky Mountains National Park/hwb01128 ID. Hamilton, W.B. 1128ct Great Smoky Mountains National Park, Tennessee and North Carolina. Cleaved feldspathic sandstone on Little River near Elkmont road. January 1954. #1:/Great Smoky Mountains National Park/hwb01134 ID. Hamilton, W.B. 1134ct Great Smoky Mountains National Park, Tennessee and North Carolina. Sheared sandstone and green phyllite in the Anakeesta Formation north of Newfound Gap. February 1954. #1:/Great Smoky Mountains National Park/hwb01140 ID. Hamilton, W.B. 1140ct Great Smoky Mountains National Park, Tennessee and North Carolina. Thunderhead Sandstone at Chimneys Overlook. February 1954. #1:/Great Smoky Mountains National Park/hwb01141 ID. Hamilton, W.B. 1141ct Great Smoky Mountains National Park, Tennessee and North Carolina. Sandstone block field at Chimneys Overlook. Deposit of blocks from post- semiglacial climate. February 1954. #1:/Great Smoky Mountains National Park/hwb01143 ID. Hamilton, W.B. 1143ct Great Smoky Mountains National Park, Tennessee and North Carolina. Snow and flowing creek near Newfound Gap. March 1954. #1:/Great Smoky Mountains National Park/hwb01153 ID. Hamilton, W.B. 1153ct Great Smoky Mountains National Park, Tennessee and North Carolina. Cascades on Little River near the Sinks. Meta-sandstone beds. May 1954. #1:/Antarctica/hwb01178 ID. Hamilton, W.B. 1178ct Antarctica. Salts on rocks by salt pools at Taylor Glacier in the McMurdo Sound area. December 15, 1958. #1:/Antarctica/hwb01182 ID. Hamilton, W.B. 1182ct Antarctica. Moraines of a glacier west of Suess Glacier in the McMurdo Sound area. December 13, 1958. #1:/Antarctica/hwb01201 ID. Hamilton, W.B. 1201ct Antarctica. Taylor Glacier icefall in the McMurdo Sound area. December 4, 1958. #1:/Antarctica/hwb01206 ID. Hamilton, W.B. 1206ct Antarctica. Outwash stream at Bonney Lake in the McMurdo Sound area. December 18, 1958 #1:/Hamilton W.B. Collection/hwb01315 ID. Hamilton, W.B. 1315ct Primarily dolomite breccia bed. Bed in place sedimentary breccia, Queen sandstone. Permian back reef facies. Rocky Arroyo, Guadalupe Mountains. Mexico. April 1965. #1:/Hamilton W.B. Collection/hwb01317 ID. Hamilton, W.B. 1317ct Coral and algae in reef. Mouth of Dark Canyon, Guadalupe Mountains. Eddy County, New Mexico. April 1965. #1:/Hamilton W.B. Collection/hwb01329 ID. Hamilton, W.B. 1329ct Specimens of granite. Fine granite, rhyolite, porphyry rhyolite. Precambrian, St. Francis Mountains. Missouri. April 1965. #1:/Canada/hwb01502 ID. Hamilton, W.B. 1502ct Canada. Glacial till in moraine in Whiteshell Park. September 1965. #1:/Hamilton W.B. Collection/hwb01538 ID. Hamilton, W.B. 1538ct Permian fusulinids, from west Texas. Dime for scale. September 1965. #1:/New Zealand/hwb01574 ID. Hamilton, W.B. 1574ct New Zealand. Rhyolite welded tuff on the walls of the Waikato River gorge at Mangakino on the North Island. November 1965. #1:/New Zealand/hwb01587 ID. Hamilton, W.B. 1587ct New Zealand. Cobblestones of consanguinous Miocene diorite and andesite on Coromandel Peninsula on the North Island. Two are diorite and three are andesite. November 1965. #1:/New Zealand/hwb01597 ID. Hamilton, W.B. 1597ct New Zealand. Flow folds in obsidian on Mayor Island. November 1965. #1:/New Zealand/hwb01599 ID. Hamilton, W.B. 1599ct New Zealand. Black obsidian filling spaces in rhyolite breccia on Mayor Island. November 1965. #1:/New Zealand/hwb01616 ID. Hamilton, W.B. 1616ct New Zealand. Spherulitic rhyolite at Paku Point on Coromandel Peninsula on the North Island. November 1965. #1:/New Zealand/hwb01657 ID. Hamilton, W.B. 1657ct New Zealand. Tasman Glacier on Mount Cook on the South Island. Ice was at the top of the moraine on the left fifty years ago. December 1965. #1:/New Zealand/hwb01659 ID. Hamilton, W.B. 1659ct New Zealand. Mount Cook National Park on the South Island. Mount Cook across Mueller Glacier and a lateral moraine. December 1965. #1:/New Zealand/hwb01660 ID. Hamilton, W.B. 1660ct New Zealand. Schist xenoliths (white) in layered gabbro at Moerakai. December 1965. #1:/New Zealand/hwb01676 ID. Hamilton, W.B. 1676ct New Zealand. Otago Harbor, an eroded volcanic caldera, at Dunedin on the South Island. December 1965. #1:/Hamilton W.B. Collection/hwb01709 ID. Hamilton, W.B. 1709ct Northeast Tennessee basement rocks. Coarse red granite east of Brushy Ridge Saddle, Fish Springs quadrangle. Carter County, Tennessee. February 1954. #1:/Capitol Reef National Monument/hwb01730 ID. Hamilton, W.B. 1730ct Capitol Reef National Monument, Utah. Wingate sandstone. Jurassic and Triassic sediments. February 1966. #1:/Hamilton W.B. Collection/hwb01736 ID. Hamilton, W.B. 1736ct Pedestals of Jurassic sandstone and mudstone. Goblin Valley, San Rafael Swell. Emery County, Utah. February 1966. #1:/Hamilton W.B. Collection/hwb01737 ID. Hamilton, W.B. 1737ct Pedestal of sandstone on mudstone. Jurassic. Goblin Valley, San Rafael Swell. Emery County, Utah. February 1966. #1:/Hamilton W.B. Collection/hwb01739 ID. Hamilton, W.B. 1739ct Jurassic shale and mudstone, San Rafael Swell. Emery County, Utah. February 1966. #1:/Hamilton W.B. Collection/hwb01835 ID. Hamilton, W.B. 1835ct Cambrian diabase-porphyry dike specimens. Arbuckle Mountains. Oklahoma. September 1954. #1:/Hamilton W.B. Collection/hwb01843 ID. Hamilton, W.B. 1843ct Precambrian coarse granite west of Tishomingo. Johnston County, Oklahoma. May 1954. #1:/Hamilton W.B. Collection/hwb01846 ID. Hamilton, W.B. 1846ct Sandstone and siltstone, Garber formation (Permian). Near Norman, Cleveland County, Oklahoma. February 1952. #1:/Hamilton W.B. Collection/hwb01848 ID. Hamilton, W.B. 1848ct Wind ripples and river silts, South Canadian River. Norman, Cleveland County, Oklahoma. February 1952. #1:/Hamilton W.B. Collection/hwb01867 ID. Hamilton, W.B. 1867ct Specimen of refolded isoclinal folds in schist. Riverside Mountains, Riverside County, California. January 1967. #1:/Hamilton W.B. Collection/hwb01869 ID. Hamilton, W.B. 1869ct Isoclinally folded quartzite. Maria Mountains. Coin for scale. Riverside County, California. January 1967. #1:/Grand Canyon National Park/hwb01901 ID. Hamilton, W.B. 1901ct Grand Canyon National Park, Arizona. Grand Canyon, viewed from Lipan Point. March 1967. See also photo hwb01902. #1:/Grand Canyon National Park/hwb01902 ID. Hamilton, W.B. 1902ct Grand Canyon National Park, Arizona. Grand Canyon, viewed from Lipan Point. Telephoto view from same location as photo hwb01901. March 1967. #1:/Grand Canyon National Park/hwb01905 ID. Hamilton, W.B. 1905ct Grand Canyon National Park, Arizona. Grand Canyon, viewed from Desert View. Paleozoic over Precambrian strata. Precambrian faulted before Paleozoic deposited. March 1967. #1:/Grand Canyon National Park/hwb01907 ID. Hamilton, W.B. 1907ct Grand Canyon National Park, Arizona. Grand Canyon, viewed from near Moran Point. March 1967. #1:/Grand Canyon National Park/hwb01908 ID. Hamilton, W.B. 1908ct Grand Canyon National Park, Arizona. Grand Canyon, viewed from Desert View. March 1967. #1:/Sunset Crater Volcano National Monument/hwb01917 ID. Hamilton, W.B. 1917ct Sunset Crater Volcano National Monument, Arizona. Squeeze-up of basalt lava through a crack in aa flow. March 1967. #1:/Idaho/hwb01945 ID. Hamilton, W.B. 1945ct Idaho. Helicopter on a rhyolite block field on the peak east of upper Marble Creek in the Idaho Primitive area. August 1966. #1:/Idaho/hwb02055 ID. Hamilton, W.B. 2055ct Idaho. Mount McGuire and Roaring Creek cirque. July 1967. #1:/Grand Canyon National Park/hwb02088 ID. Hamilton, W.B. 2088ct Grand Canyon National Park, Arizona. Down into the Grand Canyon near Hermits Post. March 1948. #1:/Grand Canyon National Park/hwb02092 ID. Hamilton, W.B. 2092ct Grand Canyon National Park, Arizona. Paleozoic and Protozoic unconformity near Desert View. August 1951. #1:/Sunset Crater Volcano National Monument/hwb02093 ID. Hamilton, W.B. 2093ct Sunset Crater Volcano National Monument, Arizona. Sunset Crater and lava flow. August 1951. #1:/Wupatki National Monument/hwb02094 ID. Hamilton, W.B. 2094ct Wupatki National Monument, Arizona. Pit weathering in Triassic sandstone. August 1951. #1:/Death Valley National Park/hwb02098 ID. Hamilton, W.B. 2098ct Death Valley National Park, California. Towner Pass. May 1950. #1:/Idaho/hwb02203 ID. Hamilton, W.B. 2203ct Idaho. Marble at Lucile in Idaho County. August 1952. #1:/Hamilton W.B. Collection/hwb02345 ID. Hamilton, W.B. 2345ct Pegmatite in migmatite. Clear Creek Canyon, Front Range, Colorado. March 1955. #1:/El Morro National Monument/hwb02378 ID. Hamilton, W.B. 2378ct El Morro National Monument, New Mexico. Inscription by de Payba Basconzelos in 1726. April 1968. #1:/El Morro National Monument/hwb02379 ID. Hamilton, W.B. 2379ct El Morro National Monument, New Mexico. Indian petroglyphs and 1636 Spanish inscription. April 1968. #1:/Hamilton W.B. Collection/hwb02417 ID. Hamilton, W.B. 2417ct Idyllwild. Suicide Rock, exfoliating granite dome. Riverside County, California. October 1968. #1:/Idaho/hwb02509 ID. Hamilton, W.B. 2509ct Idaho. Lake Creek metamorphosed agglomerate along State Road 171-D. March 1953. #1:/Idaho/hwb02522 ID. Hamilton, W.B. 2522ct Idaho. Bedding and cleavage on a hill above Riggins. June 1956. #1:/Idaho/hwb02588 ID. Hamilton, W.B. 2588ct Idaho. Massive basalt, red scoriaceous flow, north of Whitebird in Idaho County. August 1952. #1:/Hamilton W.B. Collection/hwb02643 ID. Hamilton, W.B. 2643ct Differential weathering, contorted quartzite, and limestone, Pelona Ridge. San Gabriel Mountains, Los Angeles County, California. November 1950. #1:/Death Valley National Park/hwb02649 ID. Hamilton, W.B. 2649ct Death Valley National Park, California. Panamint Mountains, viewed from Mormon Point. December 1950. #1:/Hamilton W.B. Collection/hwb02670 ID. Hamilton, W.B. 2670ct Piedmont: Carolina Slate at Bakers. Cleavage to west and bedding to east. Union County, North Carolina.n.d. #1:/Hebgen Lake, Montana, Earthquake August 1959/hwb02749 ID. Hamilton, W.B. 2749ct Hebgen Lake, Montana, Earthquake August 1959. Scarp at Grayling Creek near Culligan's Ranch. August 1959. #1:/Antarctica/hwb02765 ID. Hamilton, W.B. 2765ct Antarctica. Icefall south of Tucker Glacier in the Hallett Peninsula area of northern Victoria Land. November 6, 1964. #1:/Antarctica/hwb02860 ID. Hamilton, W.B. 2860ct Antarctica. Bedded breccia cut by dike, about 6 miles north of Cape Wheatstone on the Hallett Peninsula in northern Victoria Land. November 26, 1964. #1:/Antarctica/hwb02885 ID. Hamilton, W.B. 2885ct Antarctica. Basalt tuff at Cape Crozier on Ross Island in McMurdo Sound. October 28, 1964. #1:/Antarctica/hwb02886 ID. Hamilton, W.B. 2886ct Antarctica. Basalt scoria at Cape Crozier on Ross Island in McMurdo Sound. October 28, 1964. #1:/Hamilton W.B. Collection/hwb02908 ID. Hamilton, W.B. 2908ct Stack on coast at Piedras Blancas. San Luis Obispo County, California. December 1969. #1:/Carlsbad Caverns National Park/hwb02921 ID. Hamilton, W.B. 2921ct Carlsbad Caverns National Park, New Mexico. Cave formations. April 1965. #1:/Carlsbad Caverns National Park/hwb02922 ID. Hamilton, W.B. 2922ct Carlsbad Caverns National Park, New Mexico. Cave formations. April 1965. #1:/Carlsbad Caverns National Park/hwb02923 ID. Hamilton, W.B. 2923ct Carlsbad Caverns National Park, New Mexico. Carlsbad Caverns. April 1965. #1:/Hamilton W.B. Collection/hwb02925 ID. Hamilton, W.B. 2925ct Permian fusulinids, from Sierra Madre. Penny for scale. Mexico. April 1965. #1:/Hamilton W.B. Collection/hwb02927 ID. Hamilton, W.B. 2927ct Mylonite in Baraboo Quartzite. Wisconsin. November 1953. #1:/Great Smoky Mountains National Park/hwb0307b ID. Hamilton, W.B. 307b Great Smoky Mountains National Park, Tennessee and North Carolina. Folds in siltstone at Chilhowee Reservoir. April 1959. #1:/Hamilton W.B. Collection-Australia/hwbb0639 ID. Hamilton, W.B. 639bw Near view of glacial polish, striae and chatter marks, developed by Permian ice on Proterozoic quartzite. Ice moved toward upper right. Hallet Cove. Hammer for scale. South Australia. n.d. #1:/Petrified Forest National Park/hwbs0236 ID. Hamilton, W.B. 236ct Petrified Forest National Park, Arizona. Cross-bedded Triassic Sandstone above Permian Sandstone. August 1951. #1:/Hail W.J. Collection/hwj00016 ID. Hail, W.J.,Jr. 16 Riach coal bed in upper member of Coalmont Formation in old strip pit near Coalmont. Coal bed forms the dark cliff. Ladder at lower right is about 16 feet long. NW/4 sec. 26, T. 7 N., R. 81 W. Jackson County, Colorado. ca. 1962. Figure 8 in U.S. Geological Survey. Bulletin 1257. 1968. #1:/Irving J.D. Collection/ijd00002 ID. Irving, J.D. 2 Mine dumps west of Carbonate Hill, Leadville. Lake County, Colorado. 1908. #1:/Irving J.D. Collection-Harrison Smelter/ijd00008 ID. Irving, J.D. 8 Harrison smelter and Leadville. Lake County, Colorado. 1908 #1:/Irving J.D. Collection/ijd00009 ID. Irving, J.D. 9 Bon Air shaft house and dumps, Leadville. Lake County, Colorado. 1908. #1:/Irving J.D. Collection/ijd00010 ID. Irving, J.D. 10 Penrose shaft house, Leadville. Lake County, Colorado. 1908 #1:/Irving J.D. Collection/ijd00024 ID. Irving, J.D. 24 City of Leadville from Carbonate Hill. Forms a panorama with photographs 25, 26 and 27. Lake County, Colorado. 1908. #1:/Irving J.D. Collection/ijd00025 ID. Irving, J.D. 25 Panorama with photo 24. Leadville, from Carbonate Hill. Lake County, Colorado. 1908. #1:/Irving J.D. Collection/ijd00026 ID. Irving, J.D. 26 Panorama with photo 25. City of Leadville, from Carbonate Hill. Lake County, Colorado. 1908. #1:/Irving J.D. Collection/ijd00027 ID. Irving, J.D. 27 Panorama with photo 26. City of Leadville, from Carbonate Hill. Lake County, Colorado. 1908. #1:/Irving J.D. Collection-Moyer Mine/ijd00029 ID. Irving, J.D. 29 Shaft house and works, Moyer mine, Leadville District. Lake County, Colorado. 1908. #1:/Irving J.D. Collection/ijd00030 ID. Irving, J.D. 30 Mine dumps on north slope Carbonate Hill, Leadville District. Lake County, Colorado. 1908. #1:/Irving J.D. Collection/ijd00031 ID. Irving, J.D. 31 Leadville type of equipment near Pyrenees shaft. Lake County, Colorado. 1908 #1:/Irving J.D. Collection-A.G. and Minne Mine/ijd00032 ID. Irving, J.D. 32 Cribbed sulphide dumps A.G. and Minne mines. Lake County, Colorado. 1908. #1:/Irving J.D. Collection/ijd00033 ID. Irving, J.D. 33 Shaft house and works Wolftone mine, Leadville. Lake County, Colorado. 1908. #1:/Irving J.D. Collection-Moyer Mine/ijd00034 ID. Irving, J.D. 34 Concentration plant Moyer mine, Leadville. Lake County, Colorado. 1908. #1:/Irving J.D. Collection/ijd00035 ID. Irving, J.D. 35 Contact between porphyry and solid sulphide, Moyer mine, Leadville. Lake County, Colorado. 1908. #1:/Irving J.D. Collection-Moyer Mine/ijd00036 ID. Irving, J.D. 36 Contact porphyry and sulphide, Moyer mine, Leadville. Lake County, Colorado. 1908. #1:/Yellowstone National Park/ijp00003 ID. Iddings, J.P. 3 Yellowstone National Park, Wyoming. Rapids above the Upper Falls of the Yellowstone River. Circa 1890. #1:/Yellowstone National Park/ijp00004 ID. Iddings, J.P. 4 Yellowstone National Park, Wyoming. Lower Falls of the Yellowstone River. Circa 1890. #1:/Yellowstone National Park/ijp00007 ID. Iddings, J.P. 7 Yellowstone National Park, Wyoming. Canyon walls of the Yellowstone River below the falls. Circa 1890. #1:/Yellowstone National Park/ijp00008 ID. Iddings, J.P. 8 Yellowstone National Park, Wyoming. Canyon of the Yellowstone. Circa 1890. #1:/Yellowstone National Park/ijp00011 ID. Iddings, J.P. 11 Yellowstone National Park, Wyoming. Kepler Cascades in the Firehole River. Circa 1890. #1:/Yellowstone National Park/ijp00013 ID. Iddings, J.P. 13 Yellowstone National Park, Wyoming. Looking up Firehole River to Kepler Cascades in the middle distance. Circa 1890. #1:/Yellowstone National Park/ijp00014 ID. Iddings, J.P. 14 Yellowstone National Park, Wyoming. Down Firehole River, viewed from Kepler Cascades. Circa 1890. #1:/Yellowstone National Park/ijp00022 ID. Iddings, J.P. 22 Yellowstone National Park, Wyoming. North edge of Black Sand Basin, looking northwest. Circa 1890. #1:/Yellowstone National Park/ijp00033 ID. Iddings, J.P. 33 Yellowstone National Park, Wyoming. The boulder stands in the forest near the brink of the Grand Canyon of the Yellowstone, a short distance from Inspiration Point. It measures 24 feet in length by 20 feet in breadth and stands 18 feet above the base. It was transplanted on ice to its present position from Snowy Range. Circa 1890. Figure 10, U.S. Geological Survey Folio 30. #1:/Yellowstone National Park/ijp00034 ID. Iddings, J.P. 34 Yellowstone National Park, Wyoming. Glacial boulder, perpendicular to photo ijp00033, a short distance from Inspiration Point. Circa 1890. #1:/Yellowstone National Park/ijp00037 ID. Iddings, J.P. 37 Yellowstone National Park, Wyoming. Banded perlite remnants along Firehole River. Circa 1890. Plate 46, U.S. Geological Survey Monograph 32, part 2. #1:/Yellowstone National Park/ijp00047 ID. Iddings, J.P. 47 Yellowstone National Park, Wyoming. Echo Peak. Circa 1890. Plate 12, U.S. Geological Survey Monograph 32, part 2. #1:/Yellowstone National Park/ijp00049 ID. Iddings, J.P. 49 Yellowstone National Park, Wyoming. Mountains north of Mount Holmes in the Gallatin Range. Circa 1890. Plate 1, U.S. Geological Survey Monograph 32, part 2. 1899. #1:/Yellowstone National Park/ijp00053 ID. Iddings, J.P. 53 Yellowstone National Park, Wyoming. Looking across the flank of Mount Holmes from the head of Winter Creek. Circa 1890. #1:/Yellowstone National Park/ijp00054 ID. Iddings, J.P. 54 Yellowstone National Park, Wyoming. Mount Holmes, viewed from the head of Winter Creek. Circa 1890. Photos ijp00054 and ijp00055 form a panorama. #1:/Yellowstone National Park/ijp00055 ID. Iddings, J.P. 55 Yellowstone National Park, Wyoming. Mount Holmes, viewed from the head of Winter Creek. Circa 1890. Photos ijp00054 and ijp00055 form a panorama. #1:/Yellowstone National Park/ijp00058 ID. Iddings, J.P. 58 Yellowstone National Park, Wyoming. Columnar structure at the southern end of Obsidian Cliff columns. Circa 1884. Plate 9 (drawing), U.S. Geological Survey Annual Report 7 (1885-1886); Plate 39 (drawing), U.S. Geological Survey Monograph 32, part 2. Photos ijp00058, ijp00059, and ijp00060 form a panorama. #1:/Yellowstone National Park/ijp00059 ID. Iddings, J.P. 59 Yellowstone National Park, Wyoming. Columnar structure at the southern end of Obsidian Cliff columns. Circa 1884. Plate 9 (drawing), U.S. Geological Survey Annual Report 7 (1885-1886); Plate 39 (drawing), U.S. Geological Survey Monograph 32, part 2. Photos ijp00058, ijp00059, and ijp00060 form a panorama. #1:/Yellowstone National Park/ijp00060 ID. Iddings, J.P. 60 Yellowstone National Park, Wyoming. Columnar structure at the southern end of Obsidian Cliff columns. Circa 1884. Plate 9 (drawing), U.S. Geological Survey Annual Report 7 (1885-1886); Plate 39 (drawing), U.S. Geological Survey Monograph 32, part 2. Photos ijp00058, ijp00059, and ijp00060 form a panorama. #1:/Yellowstone National Park/ijp00065 ID. Iddings, J.P. 65 Yellowstone National Park, Wyoming. Top of obsidian columns on Obsidian Cliff. Circa 1884. Plate 10, U.S. Geological Survey Annual Report 7 (1885- 1886); Plate 40 (drawing), U.S. Geological Survey Monograph 32, part 2. #1:/Yellowstone National Park/ijp00067 ID. Iddings, J.P. 67 Yellowstone National Park, Wyoming. Perlite with spherulites on the cliffs of Firehole River. Circa 1884. Photograph emulsion peeling off right edge. #1:/Yellowstone National Park/ijp00069 ID. Iddings, J.P. 69 Yellowstone National Park, Wyoming. Cliff of lithoidal rhyolite. Circa 1884. Plate 11 (drawing), U.S. Geological Survey Annual Report 7 (1885-1886). #1:/Yellowstone National Park/ijp00070 ID. Iddings, J.P. 70 Yellowstone National Park, Wyoming. Fissile lithoidal rhyolite on Obsidian Cliff. Circa 1884. Plate 42, U.S. Geological Survey Monograph 32, part 2. #1:/Yellowstone National Park/ijp00071 ID. Iddings, J.P. 71 Yellowstone National Park, Wyoming. Columnar rhyolite on the west side of Obsidian Creek. Circa 1884. Plate 44, U.S. Geological Survey Monograph 32, part 2. #1:/Yellowstone National Park/ijp00072 ID. Iddings, J.P. 72 Yellowstone National Park, Wyoming. West edge of National Park Mountain, one mile west of Madison Junction. Circa 1890. #1:/Yellowstone National Park/ijp00073 ID. Iddings, J.P. 73 Yellowstone National Park, Wyoming. Mount Haynes, 1.5 miles west of Madison Junction, looking southwest. Circa 1890. #1:/Yellowstone National Park/ijp00075 ID. Iddings, J.P. 75 Yellowstone National Park, Wyoming. Columnar structure on Obsidian Cliff in Madison Canyon. Circa 1890. Plate 45, U.S. Geological Survey Monograph 32, part 2. 1899. #1:/Yellowstone National Park/ijp00076 ID. Iddings, J.P. 76 Yellowstone National Park, Wyoming. Perlite with spherulites along Firehole River. Circa 1890. Plate 47, U.S. Geological Survey Monograph 32, part 2. #1:/Yellowstone National Park/ijp00077 ID. Iddings, J.P. 77 Yellowstone National Park, Wyoming. Perlite with spherulites along Firehole River. Circa 1890. #1:/Yellowstone National Park/ijp00078 ID. Iddings, J.P. 78 Yellowstone National Park, Wyoming. Perlite with spherulites, half a mile above the falls on lower Firehole River. Circa 1890. #1:/Yellowstone National Park/ijp00081 ID. Iddings, J.P. 81 Yellowstone National Park, Wyoming. Natural bridge of rhyolite on Bridge Creek on the east side of Yellowstone Lake. Circa 1890. Plate 48, U.S. Geological Survey Monograph 32, part 2. #1:/Yellowstone National Park/ijp00082 ID. Iddings, J.P. 82 Yellowstone National Park, Wyoming. Vertical plates of rhyolite on the face of a natural bridge on the east side of Yellowstone Lake. Circa 1890. Plate 49, U.S. Geological Survey Monograph 32, part 2. #1:/Yellowstone National Park/ijp00083 ID. Iddings, J.P. 83 Yellowstone National Park, Wyoming. Rustic Falls at Glen Lake. Circa 1890. #1:/Yellowstone National Park/ijp00089 ID. Iddings, J.P. 89 Yellowstone National Park, Wyoming. Southeast across Yellowstone Lake from south of Lake Ranger Station. Circa 1890. #1:/Yellowstone National Park/ijp00092 ID. Iddings, J.P. 92 Yellowstone National Park, Wyoming. Yellowstone Lake lagoon just west of the outlet, looking north. Circa 1890. #1:/Yellowstone National Park/ijp00093 ID. Iddings, J.P. 93 Yellowstone National Park, Wyoming. Yellowstone Lake lagoon just west of the outlet, looking southeast toward the Absaroka Range. Circa 1890. #1:/Yellowstone National Park/ijp00100 ID. Iddings, J.P. 100 Yellowstone National Park, Wyoming. Outlet of Excelsior Geyser in Midway Geyser Basin. Circa 1890. #1:/Yellowstone National Park/ijp00101 ID. Iddings, J.P. 101 Yellowstone National Park, Wyoming. Runway of Indigo Spring. Circa 1890. #1:/Yellowstone National Park/ijp00131 ID. Iddings, J.P. 131 Yellowstone National Park, Wyoming. Spring in Gallatin Canyon in the Gallatin Range. Circa 1890. #1:/Yellowstone National Park/ijp00134 ID. Iddings, J.P. 134 Yellowstone National Park, Wyoming. Three Rivers Peak. Circa 1890. #1:/Yellowstone National Park/ijp00141 ID. Iddings, J.P. 141 Yellowstone National Park, Wyoming. Tower Falls. Circa 1890. #1:/Yellowstone National Park/ijp00142 ID. Iddings, J.P. 142 Yellowstone National Park, Wyoming. Two ledges of basalt exposed in the east wall of the Grand Canyon of the Yellowstone at the Tower Falls area. Ancient stream gravels between basalt flows. The hill is capped by lake sediments, sand, and gravel. Circa 1890. #1:/Yellowstone National Park/ijp00147 ID. Iddings, J.P. 147 Yellowstone National Park, Wyoming. Tower Junction area, looking southeast across Rainy Lake. Circa 1890. #1:/Yellowstone National Park/ijp00148 ID. Iddings, J.P. 148 Yellowstone National Park, Wyoming. Rainy Lake, viewed from a position to the left of photo ijp00147. Circa 1890. #1:/Yellowstone National Park/ijp00150 ID. Iddings, J.P. 150 Yellowstone National Park, Wyoming. Erratic in Pleasant Valley. Circa 1890. #1:/Yellowstone National Park/ijp00151 ID. Iddings, J.P. 151 Yellowstone National Park, Wyoming. Erratics in Pleasant Valley. Circa 1890. #1:/Yellowstone National Park/ijp00153 ID. Iddings, J.P. 153 Yellowstone National Park, Wyoming. North over erratics toward Garnet Hill and Hellroaring Mountain. Circa 1890. #1:/Yellowstone National Park/ijp00154 ID. Iddings, J.P. 154 Yellowstone National Park, Wyoming. North toward the Little Buffalo Creek drainage. Circa 1890. #1:/Yellowstone National Park/ijp00163 ID. Iddings, J.P. 163 Yellowstone National Park, Wyoming. Basalt cliff near Tower Falls. Circa 1890. #1:/Yellowstone National Park/ijp00164 ID. Iddings, J.P. 164 Yellowstone National Park, Wyoming. Columnar structure in Yellowstone Canyon. Circa 1890. Plate 58, U.S. Geological Survey Monograph 32, part 2. #1:/Yellowstone National Park/ijp00170 ID. Iddings, J.P. 170 Yellowstone National Park, Wyoming. South slopes of Mount Everts. Circa 1890. #1:/Yellowstone National Park/ijp00174 ID. Iddings, J.P. 174 Yellowstone National Park, Wyoming. Rustic Geyser in Heart Lake Geyser Basin in eruption. Circa 1890. #1:/Yellowstone National Park/ijp00177 ID. Iddings, J.P. 177 Yellowstone National Park, Wyoming. Spike Geyser in Heart Lake Geyser Basin, showing mass of siliceous sinter built up around the basin. Circa 1890. #1:/Yellowstone National Park/ijp00180 ID. Iddings, J.P. 180 Yellowstone National Park, Wyoming. Algae basin in Emerald Spring, showing formation of siliceous sinter. Circa 1890. #1:/Yellowstone National Park/ijp00189 ID. Iddings, J.P. 189 Yellowstone National Park, Wyoming. Small geyser in eruption in Upper Geyser basin. Circa 1890. #1:/Yellowstone National Park/ijp00200 ID. Iddings, J.P. 200 Yellowstone National Park, Wyoming. Overflow (runway(?) of Excelsior Geyser in Midway Geyser Basin. Circa 1890. #1:/Yellowstone National Park/ijp00203 ID. Iddings, J.P. 203 Yellowstone National Park, Wyoming. East Economic Geyser, looking northwest. Circa 1890. #1:/Yellowstone National Park/ijp00204 ID. Iddings, J.P. 204 Yellowstone National Park, Wyoming. Giant Geyser in Upper Geyser Basin. Circa 1890. #1:/Yellowstone National Park/ijp00211 ID. Iddings, J.P. 211 Yellowstone National Park, Wyoming. Old Faithful in Upper Geyser Basin in eruption. Circa 1890. #1:/Yellowstone National Park/ijp00212 ID. Iddings, J.P. 212 Yellowstone National Park, Wyoming. Rustic Geyser in Heart Lake Geyser Basin in eruption. Circa 1890. #1:/Yellowstone National Park/ijp00218 ID. Iddings, J.P. 218 Yellowstone National Park, Wyoming. South Arm of Yellowstone Lake, viewed from Overlook Mountain. Circa 1890. Photos ijp00219 and ijp00219 form a panorama. #1:/Yellowstone National Park/ijp00219 ID. Iddings, J.P. 219 Yellowstone National Park, Wyoming. South Arm of Yellowstone Lake, viewed from Overlook Mountain. Circa 1890. Photos ijp00219 and ijp00219 form a panorama. #1:/Yellowstone National Park/ijp00220 ID. Iddings, J.P. 220 Yellowstone National Park, Wyoming. Mount Sheridan and Heart Lake. Circa 1890. #1:/Iddings J.P. Collection-Yellowstone National Park/ijp00221 ID. Iddings, J.P. 221 Waterfalls. Yellowstone National Park, Wyoming. ca. 1890. #1:/Grand Teton National Park/ijp00224 ID. Iddings, J.P. 224 Grand Teton National Park, Wyoming. Mount Moran. #1:/Yellowstone National Park/ijp00238 ID. Iddings, J.P. 238 Yellowstone National Park, Wyoming. Electric Peak. Circa 1890. #1:/Yellowstone National Park/ijp00239 ID. Iddings, J.P. 239 Yellowstone National Park, Wyoming. Electric Peak, viewed from the south, 11,100 feet altitude. Circa 1890. #1:/Yellowstone National Park/ijp00240 ID. Iddings, J.P. 240 Yellowstone National Park, Wyoming. Electric Peak. Circa 1890. Photos ijp00240 and ijp00241 form a panorama. #1:/Yellowstone National Park/ijp00241 ID. Iddings, J.P. 241 Yellowstone National Park, Wyoming. Electric Peak. Circa 1890. Photos ijp00240 and ijp00241 form a panorama. #1:/Yellowstone National Park/ijp00246 ID. Iddings, J.P. 246 Yellowstone National Park, Wyoming. Gardner's Hole area. View is southwest cross Glen Creek to the Gallatin Range. Circa 1890. #1:/Yellowstone National Park/ijp00248 ID. Iddings, J.P. 248 Yellowstone National Park, Wyoming. Bannock Peak in the Gallatin Range. View is from Panther Creek Valley. Circa 1890. #1:/Yellowstone National Park/ijp00249 ID. Iddings, J.P. 249 Yellowstone National Park, Wyoming. Bannock Peak, viewed from Panther Creek Valley. Circa 1890. Plate 8, U.S. Geological Survey Monograph 32, part 2. #1:/Yellowstone National Park/ijp00250 ID. Iddings, J.P. 250 Yellowstone National Park, Wyoming. Dome Mountain, viewed from Indian Creek. Circa 1890. #1:/Yellowstone National Park/ijp00251 ID. Iddings, J.P. 251 Yellowstone National Park, Wyoming. Indian Creek. View is southwest to Antler Peak. Circa 1890. Plate 6, U.S. Geological Survey Monograph 32, part 2. #1:/Yellowstone National Park/ijp00253 ID. Iddings, J.P. 253 Yellowstone National Park, Wyoming. Indian Creek, looking west to Echo Peak in Bighorn Park. Circa 1890. Photos ijp00253 and ijp00254 form a panorama. #1:/Yellowstone National Park/ijp00254 ID. Iddings, J.P. 254 Yellowstone National Park, Wyoming. Indian Creek, looking west to Echo Peak in Bighorn Park. Circa 1890. Photos ijp00253 and ijp00254 form a panorama. #1:/Yellowstone National Park/ijp00256 ID. Iddings, J.P. 256 Yellowstone National Park, Wyoming. Three River Peak, viewed from Gallatin Valley. Circa 1890. Plate 7, U.S. Geological Survey Monograph 32, part 2. #1:/Yellowstone National Park/ijp00268 ID. Iddings, J.P. 268 Yellowstone National Park, Wyoming. Crowfoot Ridge in the Gallatin Range, showing upturned beds of measured section. Circa 1890. Plate 2, U.S. Geological Survey Monograph 32, part 2. #1:/Yellowstone National Park/ijp00273 ID. Iddings, J.P. 273 Yellowstone National Park, Wyoming. Eagle Peak. Circa 1890. #1:/Yellowstone National Park/ijp00275 ID. Iddings, J.P. 275 Yellowstone National Park, Wyoming. Eagle Peak. Circa 1890. Plate 35, U.S. Geological Survey Monograph 32, part 2. #1:/Yellowstone National Park/ijp00276 ID. Iddings, J.P. 276 Yellowstone National Park, Wyoming. Table Mountain. Note the characteristic bedding of the breccias and their mode of erosion in abrupt escarpments. Circa 1890. Figure 11, U.S. Geological Survey Folio 30. #1:/Yellowstone National Park/ijp00289 ID. Iddings, J.P. 289 Yellowstone National Park, Wyoming. Near Clepsydra Geyser in the Fountain Paint Pot area in Lower Geyser Basin, looking southwest. Circa 1890. #1:/Yellowstone National Park/ijp00305 ID. Iddings, J.P. 305 Yellowstone National Park, Wyoming. Upper Glen Creek. View is northwest to Electric Peak in the left background. Circa 1890. #1:/Yellowstone National Park/ijp00307 ID. Iddings, J.P. 307 Yellowstone National Park, Wyoming. Electric Peak, viewed from Sepulchre Mountain. Circa 1890. Photos ijp00307, ijp00308, and ijp00309 form a panorama. #1:/Yellowstone National Park/ijp00308 ID. Iddings, J.P. 308 Yellowstone National Park, Wyoming. Electric Peak, viewed from Sepulchre Mountain. Circa 1890. Photos ijp00307, ijp00308, and ijp00309 form a panorama. #1:/Yellowstone National Park/ijp00309 ID. Iddings, J.P. 309 Yellowstone National Park, Wyoming. Electric Peak, viewed from Sepulchre Mountain. Circa 1890. Photos ijp00307, ijp00308, and ijp00309 form a panorama. #1:/Yellowstone National Park/ijp00313 ID. Iddings, J.P. 313 Yellowstone National Park, Wyoming. Head of the east gulch of Electric Peak. Circa 1890. Plate 14 (sketch), U.S. Geological Survey Monograph 32, part 2. Photos ijp00313, ijp00314, ijp00315, and ijp00316 form a panorama. #1:/Yellowstone National Park/ijp00314 ID. Iddings, J.P. 314 Yellowstone National Park, Wyoming. Head of the east gulch of Electric Peak. Circa 1890. Plate 14 (sketch), U.S. Geological Survey Monograph 32, part 2. Photos ijp00313, ijp00314, ijp00315, and ijp00316 form a panorama. #1:/Yellowstone National Park/ijp00315 ID. Iddings, J.P. 315 Yellowstone National Park, Wyoming. Head of the east gulch of Electric Peak. Circa 1890. Plate 14 (sketch), U.S. Geological Survey Monograph 32, part 2. Photos ijp00313, ijp00314, ijp00315, and ijp00316 form a panorama. #1:/Yellowstone National Park/ijp00316 ID. Iddings, J.P. 316 Yellowstone National Park, Wyoming. Head of the east gulch of Electric Peak. Circa 1890. Plate 14 (sketch), U.S. Geological Survey Monograph 32, part 2. Photos ijp00313, ijp00314, ijp00315, and ijp00316 form a panorama. #1:/Yellowstone National Park/ijp00320 ID. Iddings, J.P. 320 Yellowstone National Park, Wyoming. Southeast the to summit of Sepulcher Mountain across the headwaters of Stephens Creek. Circa 1890. Plate 15, U.S. Geological Survey Monograph 32, part 2. Photos ijp00320 and ijp00321 form a panorama. #1:/Yellowstone National Park/ijp00321 ID. Iddings, J.P. 321 Yellowstone National Park, Wyoming. Southeast the to summit of Sepulcher Mountain across the headwaters of Stephens Creek. Circa 1890. Plate 15, U.S. Geological Survey Monograph 32, part 2. Photos ijp00320 and ijp00321 form a panorama. #1:/Yellowstone National Park/ijp00323 ID. Iddings, J.P. 323 Yellowstone National Park, Wyoming. Fossil tree trunk in Fossil Forest. Circa 1890. #1:/Yellowstone National Park/ijp00324 ID. Iddings, J.P. 324 Yellowstone National Park, Wyoming. Fossil tree trunk Sequoia magnifica in Fossil Forest. Circa 1890. Plate 105, U.S. Geological Survey Monograph 32, part 2. #1:/Yellowstone National Park/ijp00325 ID. Iddings, J.P. 325 Yellowstone National Park, Wyoming. Fossil tree trunks pilyoxylon aldersoni in Fossil Forest on Specimen Ridge. Two fine specimens of fossil trees exposed on a steep hillside by the erosion of the basic breccia in which roots are firmly embedded. Nearby is a bold cliff, showing the character of the breccia and the manner in which it has been deposited. Circa 1890. Figure 2, U.S. Geological Survey Folio 30. #1:/Yellowstone National Park/ijp00326 ID. Iddings, J.P. 326 Yellowstone National Park, Wyoming. Fossil tree trunks pityoxylon aldersoni in Fossil Forest. Circa 1890. #1:/Yellowstone National Park/ijp00327 ID. Iddings, J.P. 327 Yellowstone National Park, Wyoming. Petrified tree trunk Sequoia magnifica in Fossil Forest. Circa 1890. Plate 104, U.S. Geological Survey Monograph 32, part 2. #1:/Yellowstone National Park/ijp00328 ID. Iddings, J.P. 328 Yellowstone National Park, Wyoming. Specimen Ridge, looking west to Junction Butte. Petrified tree trunk Pityoxylon amethstinum in Fossil Forest. Circa 1890. Plate 107, U.S. Geological Survey Monograph 32, part 2. #1:/Yellowstone National Park/ijp00330 ID. Iddings, J.P. 330 Yellowstone National Park, Wyoming. Petrified tree trunk Pityoxylon amethstinum. Circa 1890. Plate 108, U.S. Geological Survey Monograph 32, part #1:/Yellowstone National Park/ijp00335 ID. Iddings, J.P. 335 Yellowstone National Park, Wyoming. Down Yellowstone River Canyon, 1 mile below its confluence with Elk Creek. Circa 1890. #1:/Yellowstone National Park/ijp00343 ID. Iddings, J.P. 343 Yellowstone National Park, Wyoming. Republic Pass. Circa 1890. #1:/Yellowstone National Park/ijp00345 ID. Iddings, J.P. 345 Yellowstone National Park, Wyoming. Republic Pass, looking west toward Amphitheater Mountain. Circa 1890. Plate 29, U.S. Geological Survey Monograph 32, part 2. Photos ijp00345 and ijp00346 form a panorama. #1:/Yellowstone National Park/ijp00346 ID. Iddings, J.P. 346 Yellowstone National Park, Wyoming. Republic Pass, looking west toward Amphitheater Mountain. Circa 1890. Plate 29, U.S. Geological Survey Monograph 32, part 2. Photos ijp00345 and ijp00346 form a panorama. #1:/Yellowstone National Park/ijp00347 ID. Iddings, J.P. 347 Yellowstone National Park, Wyoming. Soda Butte Creek, looking west toward Barronette Peak. Circa 1890. Plate 26, U.S. Geological Survey Monograph 32, part 2. #1:/Yellowstone National Park/ijp00348 ID. Iddings, J.P. 348 Yellowstone National Park, Wyoming. East-west escarpment north of main Parker Peak, looking northwest. Circa 1890. Photos ijp00348 and ijp00349 form a panorama. #1:/Yellowstone National Park/ijp00349 ID. Iddings, J.P. 349 Yellowstone National Park, Wyoming. East-west escarpment north of main Parker Peak, looking northwest. Circa 1890. Photos ijp00348 and ijp00349 form a panorama. #1:/Yellowstone National Park/ijp00354 ID. Iddings, J.P. 354 Yellowstone National Park, Wyoming. Hoodoos in Hoodoos Basin in the Absaroka Range. Circa 1890. Plate 30, U.S. Geological Survey Monograph 32, part 2. #1:/Yellowstone National Park/ijp00356 ID. Iddings, J.P. 356 Yellowstone National Park, Wyoming. Hoodoo Temple in Hoodoo Basin in the Absaroka Range. Note the varied and fantastic forms of erosion seen in the basic breccias. They occur along the summit of cliffs and have been designated "hoodoos" from their grotesque appearances. Circa 1890. Figure 1, U.S. Geological Survey Folio 30. #1:/Yellowstone National Park/ijp00363 ID. Iddings, J.P. 363 Yellowstone National Park, Wyoming. Siliceous sinter from Coral Spring. Circa 1890. See also photo ijp00364. #1:/Yellowstone National Park/ijp00364 ID. Iddings, J.P. 364 Yellowstone National Park, Wyoming. Siliceous sinter from Coral Spring. It appears to have been cut. Circa 1890. See also photo ijp00363. #1:/Yellowstone National Park/ijp00389 ID. Iddings, J.P. 389 Yellowstone National Park, Wyoming. Cook and gear in camp at Tower Junction(?). Circa 1890. #1:/Yellowstone National Park/ijp00393 ID. Iddings, J.P. 393 Yellowstone National Park, Wyoming. Horse with pack and camp hand at Tower Junction. Circa 1890. #1:/Yellowstone National Park/ijp00394 ID. Iddings, J.P. 394 Yellowstone National Park, Wyoming. Mule-drawn covered wagon in the Tower Junction area. Circa 1890. #1:/Yellowstone National Park/ijp00421 ID. Iddings, J.P. 421 Yellowstone National Park, Wyoming.J.P. Iddings. Yellowstone National Park, Wyoming.J.P. Iddings with a dead deer slung over a horse. Steam is venting from the earth behind him. #1:/Klondike Gold Rush National Historic Park/jbl00008 ID. Johnson, B.L. 8 Klondike Gold Rush National Historic Park, Alaska. East from the Fifth Avenue Hotel in Skagway. June 1909. #1:/Klondike Gold Rush National Historic Park/jbl00009 ID. Johnson, B.L. 9 Klondike Gold Rush National Historic Park, Alaska. North from the Fifth Avenue Hotel in Skagway. June 1909. #1:/Alaska Glaciers/jbl00124 ID. Johnson, B.L. 124 Alaska Glaciers. Front of Gulkana Glacier, which is north of Paxson in the Alaska Range. Circa 1909. #1:/Alaska Glaciers/jbl00131 ID. Johnson, B.L. 131 Alaska Glaciers. Terminus of Maclaren Glacier, which is southeast of Mount Hayes. Circa 1910. #1:/Alaska Glaciers/jbl00462 ID. Johnson, B.L. 462 Alaska Glaciers. Harriman Glacier at head of Harriman Fjord. The glacier is northeast of Whittier in the Chugach Mountains. August 1913. #1:/Alaska Glaciers/jbl00518 ID. Johnson, B.L. 518 Alaska Glaciers. Barry, Coxe and Cascade Glaciers in the Chugach Mountains. August 14, 1913.Plate 6-A, U.S. Geological Survey Professional Paper 98. #1:/Alaska Glaciers/jbl00578 ID. Johnson, B.L. 578 Alaska Glaciers. Terminus of Shoup Glacier, which is west of Valdez in the Chugach Mountains. September 1914. Photos jbl00578 through jbl00581 form a panorama. #1:/Alaska Glaciers/jbl00581 ID. Johnson, B.L. 581 Alaska Glaciers. Terminus of Shoup Glacier, which is west of Valdez in the Chugach Mountains. September 1914. #1:/Glacier Bay National Park and Preserve/jbl00589 ID. Johnson, B.L. 589 Glacier Bay National Park and Preserve, Alaska. Cascade Glacier at its junction with Barry Glacier. The glaciers are almost separated, and Cascade Glacier has begun to retreat up the fiord wall. Plate 6-B, U.S. Geological Survey. Professional Paper 98. #1:/Alaska Glaciers/jbl00591 ID. Johnson, B.L. 591 Alaska Glaciers. Barry and Coxe Glaciers in the Chugach Mountains. The glaciers are much more widely separated than in previous years. October 5, 1914. Plate 5-B, U.S. Geological Survey Professional Paper 98. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00001 ID. Johnson, C.E. 1 Imperial Valley, California, Earthquake October 15, 1979. Imperial Fault trace 1 kilometer south of County Highway S-80 (11.3 kilometers northwest of the southeast end of the fault). Echelon fissures (vertically oriented) trend N. 20-50 degrees W. The fault trace trends between N. 30-40 degrees W. Compressional features (dark horizontal bands) join the ends of the separate echelon fractures. The distance between the manmade berms (wide dark diagonal bands) is about 9.1 meters. The maximum width of the obviously deformed zone is about 0.6 meter. View is south. Photo by M.J. Rymer, October 23, 1979. Figure 85, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00002 ID. Johnson, C.E. 2 Imperial Valley, California, Earthquake October 15, 1979. Rupture (or "mole track") on the Imperial Fault in a field south of Heber Road (2.4 kilometers northwest of the southeast end of the fault). Piled-up soil fragments are compressional mounds that formed between the ends of echelon fractures in the ground. View is northwest.J.C. Tinsley measured 45 degrees and 3 centimeters of dextral displacement on offset crop rows in this field. Photo by J.C. Tinsley, October 17, 1979. Figure 86, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00003 ID. Johnson, C.E. 3 Imperial Valley, California, Earthquake October 15, 1979. Imperial Fault at Robinson Road (20 kilometers northwest of the southeast end of the fault). The vertical component of the 1979 slip created a low scarp (shadowed line) here that has been smoothed at the road surface by grading. The vertical displacement at the surface rupture is about 28 centimeters. The surface rupture on the right extends along the line of bushes that conceal it. Vegetation lineaments of this type commonly mark the fault trace along the margin of Mesquite Basin where some land has not been farmed or otherwise modified. View is northwest. Photo by M.J. Rymer, October 23, 1979. Figure 87, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00004 ID. Johnson, C.E. 4 Imperial Valley, California, Earthquake October 15, 1979. Imperial Fault at Dogwood Road (23.1 kilometers northwest of the southeast end of the fault). The main fault trace crosses the top horizontally. Gullies are deeply incised on the upthrown (southwest) side of the fault. The secondary fault branches northward nearly parallel to Dogwood Road and eventually crosses the pavement about 170 meters north of the point where the main fracture crosses it. View is southwest. Photo by D.G. Herd, October 22, 1979. Figure 88, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00005 ID. Johnson, C.E. 5 Imperial Valley, California, Earthquake October 15, 1979. Imperial Fault 1.7 kilometers south of Keystone Road site 72 (location shown on Plate 1, Professional Paper 1254). The canal liner near the center was one site monitored for data on the horizontal and vertical components of afterslip. The plunge of the slip here is about 61 degrees in the fault surface, which is nearly vertical in a canal-bank exposure beyond the left edge. View is southwest. Photo by M.J. Rymer, October 23, 1979. Figure 89, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00006 ID. Johnson, C.E. 6 Imperial Valley, California, Earthquake October 15, 1979. Imperial Fault at Harris Road site 67 (location shown on Plate 1, Professional Paper 1254), which passes between the utility poles on the right. The sinuosity of the fault trace is typical of much of the northern segment of the Imperial Fault where the vertical component of the slip is large. Gullying of the upthrown (southwest) side of the fault has etched the rounded late Holocene scarp. Note the general, but imperfect, congruence of the new surface rupture (dark narrow line) with the base of the older escarpment. View is southwest. Photo by M.J. Rymer, October 23, 1979. Figure 90, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00007 ID. Johnson, C.E. 7 Imperial Valley, California, Earthquake October 15, 1979. Imperial Fault at Interstate Highway 8 site 15 (location shown on Plate 1, Professional Paper 1254). The main fault trace, marked by offset rows of asparagus in the foreground, dies out southeastward in the field beyond the highway. The subsidiary branching fault that crosses this field northwestward to the highway probably joins the main fault near the palms in the foreground. View is southeast. Photo by M.J. Rymer, December 12, 1979. Figure 91, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00008 ID. Johnson, C.E. 8 Imperial Valley, California, Earthquake October 15, 1979. Imperial Fault 0.8 kilometer south of McCabe Road (4.8 kilometers northwest of the southeast end of the fault). The double trace of the fault here outlines the depression between echelon strands that was flooded by leakage from the canal liner (foreground) broken by the October 15 displacement. The distance between the berms is about 23 meters. View is north. Photo by M.J. Rymer, October 23, 1979. Figure 93, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00009 ID. Johnson, C.E. 9 Imperial Valley, California, Earthquake October 15, 1979. Northern branch of the Imperial Fault 0.3 kilometer north of Keystone Road site 86 (location shown on Plate 1, Professional Paper 1254). Of the three breaks at Keystone Road, this was the only strand of the Imperial Fault that extended away from the pavement. The sinuous surface rupture is made up of left-stepping echelon breaks. Vertical displacement (far side up) of 3 centimeters was measured near the lower right corner on October 21, 1979. The rupture formed a single line of fractures. Two dark bands paralleling the trace are post-earthquake footpaths worn by curious geologists and other visitors. The plow lines in the field are spaced at 3.7-meter intervals. View is southwest. Photo by M.J. Rymer, October 23, 1979. Figure 96, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00010 ID. Johnson, C.E. 10 Imperial Valley, California, Earthquake October 15, 1979. Main branch of the Imperial Fault (29.2 kilometers northwest of the southeast end of the fault), 0.4 to 0.8 kilometer north of Carey Road. The surface break is the dark line at the base of the low, slightly gullied scarp in the foreground. The trace generally follows the curved edge of the cultivated field in the distance and converges with the curved concrete canal liner at the top. View is northeast. Figure 97, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00011 ID. Johnson, C.E. 11 Imperial Valley, California, Earthquake October 15, 1979. Scarp of the Brawley Fault zone at Keystone Road site 100 (location shown on Plate 1, Professional Paper 1254). The cracks (dark line) in the pavement formed at the crest of the scarp where the flexure of the ground is greatest. The base of the scarp generally is on the west side of the cracking for all strands of the Bradley Fault Zone. This position of cracking with respect to the base of the scarp is generally present in fields as well as at road intercepts. Leveling of the profile before and after the earthquake indicated that about 9 centimeters of the total relative uplift of about 16 centimeters at the scarp was due to the October 15 earthquake. Across an 80-meter wide zone centered on the fault scarp, the total relative uplift since the road was paved in 1960 or 1961 is about 0.5 meter. View is east. Photo by R.V. Sharp, October 17, 1979. Figure 105, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00013 ID. Johnson, C.E. 13 Imperial Valley, California, Earthquake October 15, 1979. Brawley Fault zone at Keystone Road site 100 (location shown on Plate 1, Professional Paper 1254). The cracks in the pavement and in the field on the right follow the trace of the 1975 surface displacement. The dark vegetation just east of the trace formed an abrupt lineament at the fault trace before the earthquake; part of the darkness at the trace is due to low-sun shadowing of the scarp that faces west toward the camera. The fracturing near the crest of the scarp generally forms a single continuous break, although locally, multiple echelon fractures also occur on this fault strand. View is east-southeast. Photo by M.J. Rymer, October 23, 1979. Figure 107, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00014 ID. Johnson, C.E. 14 Imperial Valley, California, Earthquake October 15, 1979. Previously unknown strand of the Brawley Fault zone (11 kilometers northwest of the southeast end oLf the Imperial Fault) near Keystone Road. Low sun from the right (east) casts a shadow of the west-facing scarp, shown here on the surface of an alfalfa crop. A long sinuous rupture dies out in each direction within the field. The rupture that crosses Keystone Road in the foreground is only partly visible in the alfalfa field. The vertical and horizontal components of displacement were measured on the surface of Keystone Road by leveling and by sighting the alignment of the canal (white line) behind a power pole, respectively. Photo by M.J. Rymer, October 23, 1979. Figure 108, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00015 ID. Johnson, C.E. 15 Imperial Valley, California, Earthquake October 15, 1979. Newly discovered east trace of the Brawley Fault zone at Harris Road site 107 (location shown on Plate 1, Professional Paper 1254). The sinuous break extends to the foreground edge and beyond, but is not entirely visible in this view. A more nearly linear trace in a mown alfalfa field north of Harris Road is marked by a line of dark vegetation. View is northeast. Photo by M.J. Rymer, October 23, 1979. Figure 109, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00016 ID. Johnson, C.E. 16 Imperial Valley, California, Earthquake October 15, 1979. Surface rupture of the Brawley Fault zone site 114 (location shown on Plate 1, Professional Paper 1254) in a field north of Worthington Road site 115. The wide dark spot on the pavement represents repairs to the surface rupture at Worthington Road. Cracks in the field, visible as an erratic line extending through two excavations (dark areas), mark the trace of the fault strand. The cracks were traceable only after the harvest of the dense soybean crop more than a month after the earthquake. View is northeast. Photo by M.J. Rymer, December 12, 1979. Figure 110, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00017 ID. Johnson, C.E. 17 Imperial Valley, California, Earthquake October 15, 1979. Surface rupture: single straight break along the Superstition Hills Fault. Photo by G.S. Fuis. Figure 113-A, U.S. Geological Survey Professional Paper 1254. See also photo jce00018. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00018 ID. Johnson, C.E. 18 Imperial Valley, California, Earthquake October 15, 1979. Surface rupture: area along a single straight break along the Superstition Hills Fault shown in photo jce00017. This photograph shows 7 millimeters of right slip. Photo by G.S. Fuis. Figure 113-B, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00019 ID. Johnson, C.E. 19 Imperial Valley, California, Earthquake October 15, 1979. Surface rupture: zigzag break consisting of left-stepping echelon cracks joined by compression ridges. The echelon cracks are about 20 centimeters long. Photo by G.S. Fuis. Figure 114-A, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00020 ID. Johnson, C.E. 20 Imperial Valley, California, Earthquake October 15, 1979. Surface rupture: compression ridge connecting two left-stepping echelon cracks. The ridge consists of arched clods of delicately cemented soil a few millimeters thick. The axis of the arch parallels the ruler. Photo by G.S. Fuis. Figure 114-B, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00021 ID. Johnson, C.E. 21 Imperial Valley, California, Earthquake October 15, 1979. Ash Lateral 15 canal liner. The alignment of the canal shows the cumulative offset caused by creep events (10 centimeters plus or minus 1 centimeter of dextral displacement resolved on the fault trace). The canal is 2.02 meters wide. View is east. Photo by R.V. Sharp, November 1975. Figure 153-A, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00022 ID. Johnson, C.E. 22 Imperial Valley, California, Earthquake October 15, 1979. Ash Lateral 15 canal liner. The alignment of the canal after replacement of the damaged section of liner. The displacement is about 57 centimeters, of which probably less than 46 centimeters is due to coseismic slip and afterslip from the October 15 earthquake. The canal is 2.02 meters wide. View is east. Photo by R.V. Sharp, October 26, 1979. Figure 153-B, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00023 ID. Johnson, C.E. 23 Imperial Valley, California, Earthquake October 15, 1979. Imperial Fault trace west of Anderholt Road in alfalfa fields as it appeared shortly after the earthquake of May 18, 1940. Unpaved Anderholt Road cuts diagonally across the upper right. The dark band west of and parallel to the road is Ash Lateral 15 canal. Photo by R.V. Sharp, 1940. Figure 154-A, U.S. Geological Survey Professional Paper 1254. See also photo jce00024. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00024 ID. Johnson, C.E. 24 Imperial Valley, California, Earthquake October 15, 1979. Imperial Fault trace west of Anderholt Road. The 1979 fault trace in the same locality as in photo jce00023 in a newly planted lettuce field (center) and in newly plowed but unplanted fields (left and right). Some edges of the fields differ from their 1940 positions. Photo by R.V. Sharp. Figure 154-B, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00025 ID. Johnson, C.E. 25 Imperial Valley, California, Earthquake October 15, 1979. Imperial Fault near Carey Road, which cuts horizontally across centers. Prehistoric traces of Imperial Fault as they appeared in 1937. Solid arrows denote traces in several localities; open arrows denote a photo lineament that may be a fault trace connecting faulting north and south of Carey Road. Photo by R.V. Sharp, 1937. Figure 155-A, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00027 ID. Johnson, C.E. 27 Imperial Valley, California, Earthquake October 15, 1979. Concrete canal liner on the north side of Keystone Road on the trace of one strand within the Brawley Fault zone. About 7 centimeters of right-lateral misalignment of the left side of the canal was measured on October 21, 1979. This canal liner had been checked on a nearly annual basis since February 1975 for evidence of horizontal offset. When last checked on January 17, 1979, the liner showed no obvious right-lateral displacement. View is east. Photo by R.V. Sharp. Figure 157, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00030 ID. Johnson, C.E. 30 Imperial Valley, California, Earthquake October 15, 1979. Line of sand boils at site 11 (location shown on Plate 1, Professional Paper 1254) in a field about 1 kilometer north of Bonds Corner. The spacing between sand boils is as much as tens of meters. Some small fissures are associated with individual sand boils, but no fissures are through-going. View is north. Photo by T.L. Youd. Figure 161, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00031 ID. Johnson, C.E. 31 Imperial Valley, California, Earthquake October 15, 1979. Lateral spread at site 13 on Heber Road (location shown on Plate 1, Professional Paper 1254), showing associated displacements, fissures, and sand boils. An unlined canal shifted about 1.2 meters to the south. View is west. Photo by T.L. Youd. Figure 163-A, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00032 ID. Johnson, C.E. 32 Imperial Valley, California, Earthquake October 15, 1979. Lateral spread at site 13 on Heber Road (location shown on Plate 1, Professional Paper 1254), showing associated displacements, fissures, and sand boils. The pavement on Heber Road settled, cracked, and shifted to the south by as much as 1.2 meters. View is east. Photo by T.L. Youd. Figure 163-B, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00033 ID. Johnson, C.E. 33 Imperial Valley, California, Earthquake October 15, 1979. Lateral spread at site 13 on Heber Road (location shown on Plate 1, Professional Paper 1254), showing associated displacements, fissures, and sand boils. Sand boils, ground cracks, and displaced road and canal on the lateral spread. View is east. Photo by P. Noden. Figure 163-C, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00034 ID. Johnson, C.E. 34 Imperial Valley, California, Earthquake October 15, 1979. Ground-failure effects at site 17 near the intersection of King Road and Orchard Road (location shown on Plate 1, Professional Paper 1254). Sand boils and scarp in the road at the east end of the disturbed zone. View is south. Photo by T.L. Youd. Figure 166-A, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00035 ID. Johnson, C.E. 35 Imperial Valley, California, Earthquake October 15, 1979. Ground-failure effects at site 17 near the intersection of King Road and Orchard Road (location shown on Plate 1, Professional Paper 1254). Sand boils along the canal bank and in the field. View is west from near the east end of the disturbed zone. Photo by T.L. Youd. Figure 166-B, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00036 ID. Johnson, C.E. 36 Imperial Valley, California, Earthquake October 15, 1979. Ground-failure effects at site 17 near the intersection of King Road and Orchard Road (location shown on Plate 1, Professional Paper 1254). A broken canal lining near the west end of the disturbed zone is approximately 1 meter high. Photo by T.L. Youd. Figure 166-C, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00037 ID. Johnson, C.E. 37 Imperial Valley, California, Earthquake October 15, 1979. Ground-failure effects at site 17 near the intersection of King Road and Orchard Road (location shown on Plate 1, Professional Paper 1254). Overlapped canal lining near the east end of the disturbed zone. Note the sand boil on the bottom of the canal. Photo by T.L. Youd. Figure 166-D, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00038 ID. Johnson, C.E. 38 Imperial Valley, California, Earthquake October 15, 1979. Scarp at the boundary of a trough feature at site 18 west of Orchard Road (location shown on Plate 1, Professional Paper 1254), caused by the settlement of fill over a buried drain line. Photo by T.L. Youd. Figure 167, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00040 ID. Johnson, C.E. 40 Imperial Valley, California, Earthquake October 15, 1979. Site 23 near River Park in Brawley (location shown on Plate 1, Professional Paper 1254). Sand boils (white patches) in a stock pasture between a parking area and New River. View is south. Photo by T.L. Youd. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00041 ID. Johnson, C.E. 41 Imperial Valley, California, Earthquake October 15, 1979. Sand boils and ground cracks in the unpaved parking area at site 25 near the east shore of Wiest Lake (location shown on Plate 1, Professional Paper 1254). View is northeast. Photo by T.L. Youd. Figure 170, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00043 ID. Johnson, C.E. 43 Imperial Valley, California, Earthquake October 15, 1979. Slumps and cracks in the All American Canal embankments at site 26 (location shown on Plate 1, Professional Paper 1254). Major slump, showing an incipient slump on the left and additional cracks behind these two failures. View is south. Photo by T.L. Youd. Figure 172-A, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00044 ID. Johnson, C.E. 44 Imperial Valley, California, Earthquake October 15, 1979. Slumps and cracks in the All American Canal embankments at site 26 (location shown on Plate 1, Professional Paper 1254). The bank did not breach, but some water leaked into the pond at the top. A crane is repairing the bank at the bottom. View is south. Photo by T.L. Youd. Figure 172-B, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00045 ID. Johnson, C.E. 45 Imperial Valley, California, Earthquake October 15, 1979. Differential settlement and an incipient slump near a box culvert through the embankment of the All American Canal at site 26 (location shown on Plate 1, Professional Paper 1254). View is south. Photo by T.L. Youd. Figure 173, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00046 ID. Johnson, C.E. 46 Imperial Valley, California, Earthquake October 15, 1979. Cracks in the banks of the South Alamo Canal at site 28 west of Keffer Road (location shown on Plate 1, Professional Paper 1254). The displacements across the cracks in the near bank are consistently downward away from the canal; the displacements in the far bank are consistently downward toward the canal. The light patches in the field beyond the canal are sand boils at site 14. View is southeast. Photo by T.L. Youd. Figure 174, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00047 ID. Johnson, C.E. 47 Imperial Valley, California, Earthquake October 15, 1979. Ruptured canal lining at site 29 (location shown on Plate 1, Professional Paper 1254), caused by a few centimeters of westward lateral ground displacement on the left side of the canal. The canal was taken out of service until the lining could be repaired. View is north. Photo by T.L. Youd. Figure 175, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00048 ID. Johnson, C.E. 48 Imperial Valley, California, Earthquake October 15, 1979. Slumped banks of the Barbara Worth Drain at site 30 (location shown on Plate 1, Professional Paper 1254). The slump in the east bank destroyed a farm lane and blocked the drain. View is south. Photo by T.L. Youd. Figure 176-A, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00049 ID. Johnson, C.E. 49 Imperial Valley, California, Earthquake October 15, 1979. Slumped banks of the Barbara Worth Drain at site 30 (location shown on Plate 1, Professional Paper 1254). A slump and a scarp in the west bank. View is west. Photo by T.L. Youd. Figure 176-B, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00050 ID. Johnson, C.E. 50 Imperial Valley, California, Earthquake October 15, 1979. Slumped bank of a drain at site 31 along the south side of Worthington Road about 200 meters east of the Alamo River (location shown on Plate 1, Professional Paper 1254). View is east. Photo by T.L. Youd. Figure 177, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00051 ID. Johnson, C.E. 51 Imperial Valley, California, Earthquake October 15, 1979. State Highway 86 bridge over the New River at site 32 west of Brawley (location shown on Plate 1, Professional Paper 1254). The abutment fill settled about 0.15 meter, and both ends of the bridge and riverbanks slumped about 0.1 meter toward the stream. Ground displacements caused the bridge decks to rotate about 0.3 degree counterclockwise in a horizontal plane, but did not seriously damage the structure. Photo by T.L. Youd. Figure 178, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00052 ID. Johnson, C.E. 52 Imperial Valley, California, Earthquake October 15, 1979. Slumping of the riverbank around the piles of the bridge at site 32 west of Brawley (location shown on Plate 1, Professional Paper 1254). The soil moved 10 centimeters past the stationary piles, a gap opened on the downslope side, and soil bunched up on the upslope side. The cracks in the riverbank are typical of those in many localities along the New River and Alamo River. Photo by T.L. Youd. Figure 179, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00053 ID. Johnson, C.E. 53 Imperial Valley, California, Earthquake October 15, 1979. Abutment of the bridge at site 32 west of Brawley (location shown on Plate 1, professional paper 1254). The vertical separation at the abutment was caused by the settlement of the approach fill. Photo by T.L. Youd. Figure 181-A, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00054 ID. Johnson, C.E. 54 Imperial Valley, California, Earthquake October 15, 1979. Abutment of the bridge at site 32 west of Brawley (location shown on Plate 1, professional paper 1254). The damage to the abutment-deck connection was caused by differential movement between the bridge and the abutment. Photo by T.L. Youd. Figure 181-B, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00055 ID. Johnson, C.E. 55 Imperial Valley, California, Earthquake October 15, 1979. Arcuate incipient-slump scarp with 13 centimeters of vertical separation in the embankment at site 33 east of River Park in Brawley (location shown on Plate 1, professional paper 1254). View is southeast. Photo by T.L. Youd. Figure 182, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00056 ID. Johnson, C.E. 56 Imperial Valley, California, Earthquake October 15, 1979. Slump and cracks at site 34 in River Park in Brawley (location shown on Plate 1, professional paper 1254). The slump near the New River shows 1 meter of vertical displacement. View is north. Photo by T.L. Youd. Figure 183-A, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00057 ID. Johnson, C.E. 57 Imperial Valley, California, Earthquake October 15, 1979. Slump and cracks at site 34 in River Park in Brawley (location shown on Plate 1, professional paper 1254). Sand boils near playground equipment, along the crack south of the slump in photo jce00056. Photo by T.L. Youd. Figure 183-B, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00059 ID. Johnson, C.E. 59 Imperial Valley, California, Earthquake October 15, 1979. Cut slope at site 38 in Devils Canyon (location shown on Plate 1, Professional Paper 1254) from which small rockslides fell during the earthquake. Debris fell from the fresh scarps above. Photo by T.L. Youd. Figure 185-A, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00060 ID. Johnson, C.E. 60 Imperial Valley, California, Earthquake October 15, 1979. Cut slope at site 38 in Devils Canyon (location shown on Plate 1, Professional Paper 1254) from which small rockslides fell during the earthquake. Debris from rock slides that rolled against the guardrail. Road sign at the left. Photo by T.L. Youd. Figure 185, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00061 ID. Johnson, C.E. 61 Imperial Valley, California, Earthquake October 15, 1979. East-west-oriented sand blows, showing collapsed vents, incised drainage patterns on cones, and formation of secondary cones. Photo by S.G. Muir. Figure 189, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00062 ID. Johnson, C.E. 62 Imperial Valley, California, Earthquake October 15, 1979. Flow laminations in a sandblow dike. Note the truncated dark layers along the margins. Photo by S.G. Muir. Figure 191, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00063 ID. Johnson, C.E. 63 Imperial Valley, California, Earthquake October 15, 1979. Partial collapse of four columns along the east side of the Imperial County Services Building in El Centro. Figure 193, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00086 ID. Johnson, C.E. 86 Imperial Valley, California, Earthquake October 15, 1979. El Centro differential ground-motion array site. The recording house is shown in the right center. The house at the left is station 1; the remainder of the array extends northward (into the background). Photo by G.N. Bycroft. Figure 240, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00087 ID. Johnson, C.E. 87 Imperial Valley, California, Earthquake October 15, 1979. Imperial County Services Building in El Centro. View is north. Photo by C. Rojahn. Figure 243, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00088 ID. Johnson, C.E. 88 Imperial Valley, California, Earthquake October 15, 1979. East end of the Imperial County Services Building, showing a row of columns (far right) that failed during the main shock. View is north. Photo by C. Rojahn. Figure 244, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00089 ID. Johnson, C.E. 89 Imperial Valley, California, Earthquake October 15, 1979. One of four damaged reinforced-concrete columns along the east end of the Imperial County Services Building between the ground and second floors. The damage to the other three columns was similar. Photo by C. Rojahn. Figure 245, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00090 ID. Johnson, C.E. 90 Imperial Valley, California, Earthquake October 15, 1979. North-south-trending crack in the sixth floor just east of the first interior row of columns (from the east face) of the Imperial County Services Building in El Centro. Photo by C. Rojahn. Figure 246, U.S. Geological Survey Professional Paper 1254. #1:/Imperial Valley, California, Earthquake October 15, 1979/jce00091 ID. Johnson, C.E. 91 Imperial Valley, California, Earthquake October 15, 1979. Fiberglass instrument shelter (foreground) housing SMA-1 accelerograph east of the Imperial County Services Building (background). Note the solar cells mounted on the pole adjacent to the shelter; these cells provide current for the accelerograph's battery charger. Photo by C. Rojahn. Figure 247, U.S. Geological Survey Professional Paper 1254. #1:/Jones F.O. Collection/jfo00109 ID. Jones, F.O. 109 Profile of a landslide. Surface of rupture of an ancient landslide in Pleistocene sediments exposed by a recent landslide. Franklin D. Roosevelt Lake, (Spokane River) in foreground. Near mouth of Spokane River, Lincoln County, Washington. August 31, 1950. #1:/Jones F.O. Collection/jfo00218 ID. Jones, F.O. 218 Mudflow in Hopkins Canyon occurred about midnight February 2, 1953. It lasted 7 minutes and destroyed a small house. The flow originated in the alcove in the background which before the mudflow was an area of seeps. Slump block which settled during or after the mudflow lies to right of the alcove. This feature is analogous to the slump-earthflow with slump block and earthflow at toe in this instance the earthflow was so mobile that mudflow resulted. Slide 295, Nespelem River-Omak Lake Valley area. Okanogan County, Washington. 1953. Figure 9 in U.S. Geological Survey. Professional paper 367. 1961. #1:/Hawaii Volcanoes National Park/jhr00006 ID. Joesting, H.R. 6 Hawaii Volcanoes National Park. Joel Swartz, Hank Joesting, and Gordon Macdonald at the entrance to the seismograph station near the end of the Mauna Loa truck trail, at an elevation of approximately 7,000 feet. 1950. #1:/Hawaii Volcanoes National Park/jhr00007 ID. Joesting, H.R. 7 Hawaii Volcanoes National Park. Back of the Hawaiian Volcano Observatory, viewed from the Uwekahuna Base Station. The observation platform can be seen to the right of the building. The small figures are believed to be, left to right, Gordon Macdonald and Ray Wilcox. 1950. #1:/Hawaii Volcanoes National Park/jhr00009 ID. Joesting, H.R. 9 Hawaii Volcanoes National Park. Calibrating the magnetometers inside the Observatory library. From left to right: Ruy Finch, Gordon Macdonald, Burt Loucks, and Joel Swartz. 1950. #1:/Hawaii Volcanoes National Park/jhr00011 ID. Joesting, H.R. 11 Hawaii Volcanoes National Park. Fractured basalt in a pressure ridge just north of Halemaumau pit on the floor of Kilauea caldera. Caldera wall is in the background. Volcano House hotel on top of the cliff near the left. Byron Ledge and Kilauea Iki at the extreme right, partially included. 1950. #1:/Hawaii Volcanoes National Park/jhr00013 ID. Joesting, H.R. 13 Hawaii Volcanoes National Park. Ropy crust of pahoehoe lava on the crater floor near Crater Trail on Kilauea Volcano. 1950. #1:/Hawaii Volcanoes National Park/jhr00016 ID. Joesting, H.R. 16 Hawaii Volcanoes National Park. East across Halemaumau Crater and Kilauea caldera floor, viewed from near the Observatory. The caldera walls are in the background. 1950. #1:/Canyonlands National Park/jhr00033 ID. Joesting, H.R. 33 Canyonlands National Park, Utah. Upheaval Dome, looking northeast. The dome is southwest of Moab. Circa 1959. #1:/Canyonlands National Park/jhr00034 ID. Joesting, H.R. 34 Canyonlands National Park, Utah. Over Upheaval Canyon, showing Upheaval Dome. October 22, 1954. #1:/Glacier National Park/joh00001 ID. Johnson, A. 1 Glacier National Park, Montana. Moat at the east side of Sperry Glacier, showing stratified ice wall. August 16, 1913. Figure 18, U.S. Geological Survey Professional Paper 1180. #1:/Glacier National Park/joh00015 ID. Johnson, A. 15 Glacier National Park, Montana. Sperry Glacier, viewed from Avalanche Basin in 1894 or 1895. Avalanche Lake is in the lower foreground. Terminus of the glacier is at the head of the central stream cascading down the cliff. Circa 1895. Figure 12, U.S. Geological Survey Professional Paper 1180. #1:/Glacier National Park/joh00016 ID. Johnson, A. 16 Glacier National Park, Montana. Crevasses on Sperry Glacier. Crevasses of this magnitude were not observed during the period covered by the present report. 1897. Figure 13, U.S. Geological Survey Professional Paper 1180. #1:/Glacier National Park/joh00017 ID. Johnson, A. 17 Glacier National Park, Montana. Sperry Glacier. This earliest available photograph showing nearly the entire glacier was presumably taken from a point on the Continental Divide about 1 mile south of Hidden Lake. Surface details of the glacier are obscured by a light snowfall, but its extent then is clearly evident. The end of the horse trail and the beginning of the foot trail to the glacier are just beyond the pass in the upper central part of the photograph. Lakes that are shown on recent maps formed as the glacier retreated. Photo by F. Matthes, October 18, 1901. Photo no. 7166 from Glacier National Park files, courtesy of U.S. National Park Service. Figure 14, U.S. Geological Survey Professional Paper 1180. #1:/Glacier National Park/joh00024 ID. Johnson, A. 24 Glacier National Park, Montana. Lyman Beecher Sperry (1841-1923), physician, lecturer, and author, was the discoverer of Sperry Glacier. Sperry Glacier, Sperry Glacier Basin, and Sperry Chalets are named in his honor. During the summers of 1894-1906, Dr. Sperry camped, climbed, and explored in the Montana Rockies, particularly in the area set aside by Congress in 1910 as Glacier National Park. This photograph, taken in 1904 at some unspecified location in the park area, was by G.H. Dean, student of Dr. Sperry's, who accompanied him on the 1904 trip. Photo no. 6274 from the archives of Glacier National Park, courtesy of U.S. National Park Service. Figure 11, U.S. Geological Survey Professional Paper 1180. #1:/Estes Park, Colorado, Flood July 15, 1982/jrd00018 ID. Jarrett, R.D. 18ct Estes Park, Colorado, Flood July 15, 1982. Looking upstream at the west end of Estes Park during the peak flow of the flood which was caused by failures of Lawn Lake Dam and Cascade Lake Dam. July 15, 1982. #1:/Estes Park, Colorado, Flood July 15, 1982/jrd00019 ID. Jarrett, R.D. 19ct Estes Park, Colorado, Flood July 15, 1982. Looking downstream at the east end of Estes Park during the peak flow of the flood which was caused by failures of Lawn Lake Dam and Cascade Lake Dam. Photo by Z. Bleuins, Bureau of Reclamation, July 15, 1982. #1:/Estes Park, Colorado, Flood July 15, 1982/jrd00021 ID. Jarrett, R.D. 21ct Estes Park, Colorado, Flood July 15, 1982. Looking downstream at the muddy Big Thompson River at the Estes Park gage during the peak flow of the flood which was caused by failures of Lawn Lake Dam and Cascade Lake Dam. Photo by Z. Bleuins, Bureau of Reclamation, July 15, 1982. #1:/Hawaii Volcanoes National Park/jta00151 ID. Jaggar, T.A. 151 Hawaii Volcanoes National Park. Halemaumau lava lake. December 8, 1916. #1:/Hawaii Volcanoes National Park/jta00153 ID. Jaggar, T.A. 153 Hawaii Volcanoes National Park. Islands in Halemaumau lava lake. January 23, 1918. #1:/Hawaii Volcanoes National Park/jta00154 ID. Jaggar, T.A. 154 Hawaii Volcanoes National Park. Crags in Halemaumau lava lake. January 23, 1918. #1:/Johnson W.D. Collection/jwd00157 ID. Johnson, W.D. 157 The typical high plains of western Kansas, Western Oklahoma, and N.W. Texas. Abondoned house on horizon. 1897. Published in Twenty First Ann. Report. U.S. Geologic Survey, pt 4, 1899-1900, Pl 64. Page 610. (The Flat Uplands Subject Album V1, p42; v81, p36) #1:/Johnson W.D. Collection/jwd00171 ID. Johnson, W.D. 171 Looking northeast from summit of Knowlton Peak down U-shaped valley of South Willow Creek. Tooele County, Utah. 1901. #1:/Lassen Volcanic National Park/jwdj0216 ID. Johnston, W.D., Jr. 216 Lassen Volcanic National Park, California. Brokeoff Mountain. 1931. #1:/Jackson W.H. Collection-jack1869/jwh00001 ID. Jackson, W.H. 1 North Platte River, looking north from bridge. Woman in view may be Mrs.W.H. Jackson. Lincoln County, Nebraska. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00002 ID. Jackson, W.H. 2 Bridge over the North Platte River, near its intersection with the South Platte. Lincoln county, Nebraska. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00003 ID. Jackson, W.H. 3 Windmill at North Platte Station. At this point the Platte River runs through an almost entirely treeless plain, with but very few objects in nature to relieve the dead monotony, so that the windmills, which occur at nearly all the stations, for the purpose of raising water to the tanks, form a very prominent feature in the landscape. The river is very wide, shallow, and swift, running over bars and quicksands, with many little-willow-covered islands. The north and south forks rise respectively in the North and South Parks of Colorado, and flow some 1,200 miles to their junction with the Missouri. The bridge and station are about 290 miles west of Omaha, and have an altitude of 2,827 feet above the sea. Lincoln County, Nebraska. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00004 ID. Jackson, W.H. 4 Sherman Station, upon the broad, plateau-like summit of the Black Hills, 8,271 feet above the sea, and 196 feet above Cheyenne, only 33 miles to the eastward. Sherman, named in honor of the Commander of the United States Armies, enjoys the distinction of being the most elevated railway station in the United States. Albany County, Wyoming. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00005 ID. Jackson, W.H. 5 Reeds Rock, near Sherman, forms an excellent illustration of the style of weathering of the granites, characteristic of this region. These massive piles, like the ruins of old castles, are scattered all over the summits of the Black Hills, and the difference in the texture of the rock is such as to give a most pleasing variety of outline. They were once angular, cube-like masses, and have been worn to their present forms by the process of disintegration by exfoliation. Albany County, Wyoming. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00006 ID. Jackson, W.H. 6 Granite Cut, near Dale Creek Bridge, about 3 miles west of Sherman. The road has been drilled and blasted through a close, compact, and massive granite that is susceptible of a high polish, much like the Scottish syenite. Albany County, Wyoming. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00007 ID. Jackson, W.H. 7 Dale Creek Bridge, over Dale Creek, a small tributary of the Cache La Poudre, flowing into the South Platte. The bridge is a wooden framework structure, 650 feet long and 127 feet high, the largest of its kind on the road. Albany County, Wyoming. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00008 ID. Jackson, W.H. 8 Dale Creek Canyon, a view looking south from near the bridge. A characteristic view of the summit of the Black Hills, showing the castle-like granite boulders and scattered pines, the deep canyon with its pleasant vale, and the sparkling trout stream, glittering in the sunlight. Albany County, Wyoming. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00009 ID. Jackson, W.H. 9 Valley of the North Platte, near Fort Fred Steele, the second crossing of the river, 696 miles west from Omaha, and with an altitude of 6,845 feet. Unlike itself out upon the plains, it is here a deep clear, cold stream, not far from its sources among the perpetual snows of the Rocky Mountains. Carbon County, Wyoming. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00010 ID. Jackson, W.H. 10 Green River Butte, near view, a rock pinnacle at Green River. Sweetwater County, Wyoming. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00011 ID. Jackson, W.H. 11 Green River Butte and bridge from across the river. Sweetwater County, Wyoming. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00012 ID. Jackson, W.H. 12 Teapot Rock, near Green River Station. Sweetwater County, Wyoming. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00013 ID. Jackson, W.H. 13 Giants Club, a rock pinnacle near Green River Station. Sweetwater County, Wyoming. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00014 ID. Jackson, W.H. 14 Petrified fish cut, near Green River Station. Union Pacific Railroad on west side of Green River. Sweetwater County, Wyoming. 1869. #1:/Jackson W.H. Collection-jack1872/jwh00015 ID. Jackson, W.H. 15 A Montana ranch, comfortable if not elegant, and the home of many well to do persons engaged in mining or stock raising. Montana. 1872. #1:/Jackson W.H. Collection-jack1869/jwh00016 ID. Jackson, W.H. 16 Burning Rock cut, near Green River Station. Sweetwater County, Wyoming. 1869. #1:/Jackson W.H. Collection-jack1872/jwh00017 ID. Jackson, W.H. 17 Trout Creek flume, carrying the water so necessary to the miners, near Helena. Madison County, Montana. 1872. #1:/Jackson W.H. Collection-jack1869/jwh00018 ID. Jackson, W.H. 18 Glimpses along the west bank of Green River between Green River Station and Burning Rock cut, showing to good advantage the wall-like and castellated forms on the opposite side of the river. Sweetwater County, Wyoming. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00019 ID. Jackson, W.H. 19 Glimpses along the west bank of Green River between Green River Station and Burning Rock cut, showing to good advantage the wall-like and castellated forms on the opposite side of the river. Sweetwater County, Wyoming. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00020 ID. Jackson, W.H. 20 Glimpses along the west bank of Green River between Green River Station and Burning Rock cut, showing to good advantage the wall-like and castellated forms on the opposite side of the river. Sweetwater County, Wyoming. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00021 ID. Jackson, W.H. 21 Wasatch, 966 miles west from Omaha, altitude 6,870 feet, on the divide between Echo Canyon and Bear River. From this point the descent is very rapid into the famous canyon. Summit County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00022 ID. Jackson, W.H. 22 Wasatch, 966 miles west from Omaha, altitude 6,870 feet, on the divide between Echo Canyon and Bear River. From this point the descent is very rapid into the famous canyon. Summit County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00023 ID. Jackson, W.H. 23 Trestlework, Echo Canyon. High trestle on Union Pacific Railroad. Summit County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00024 ID. Jackson, W.H. 24 Tunnel No. 2, the longest on the road, 770 feet in length, cut through reddish and purplish indurated clays, of the Wasatch group of Miocene Tertiary. Summit County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00025 ID. Jackson, W.H. 25 Castle Rocks, at the head proper of Echo Canyon, 975 miles west from the Missouri and 6,282 feet elevation. They are of a massive red sandstone from 500 to 800 feet high, which have weathered into the securiously castellated forms. Summit County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00026 ID. Jackson, W.H. 26 Castle Rocks, at the head proper of Echo Canyon, 975 miles west from the Missouri and 6,282 feet elevation. They are of a massive red sandstone from 500 to 800 feet high, which have weathered into these curiously castellated forms. Summit County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00027 ID. Jackson, W.H. 27 Tower Rocks, or pinnacles upon the face of the Castle. The rocks bear a remarkable resemblance to some old dismantled fortress, with its towers, crumbling walls, and immense embrasures. Summit County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00028 ID. Jackson, W.H. 28 Tower Rocks, or pinnacles upon the face of the Castle. The rocks bear a remarkable resemblance to some old dismantled fortress, with its towers, crumbling walls, and immense embrasures. Summit County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00029 ID. Jackson, W.H. 29 Pulpit Rock, at the mouth of Echo Canyon, 991 miles from Omaha, and 5,507 feet above the sea. The railroad sweeps around it in a graceful curve, and so near that one might reach from the car window and touch it. The isolated rounded mass above, which seems to stand alone and almost ready to tumble into the valley below, is yet quite firmly seated on its bed of sandstone. It is said that once upon a time Brigham Young held forth to his flock from this rock during their pilgrimage hither. This view shows admirably the coarse conglomerate of pudding stone, characteristic of all the Echo Canyon rocks. Summit County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00030 ID. Jackson, W.H. 30 Sentinel Rock, one of the most remarkable landmarks in the canyon. It is a regular obelisk of conglomerate, standing near the junction of Echo with the Weber Canyon. It is about 250 feet in height, affords another excellent illustration of the peculiar style of weathering, by which rocks assume curious forms. This column has been very aptly called the "Dog's Head," to which it will be seen at a glance that the summit bears a resemblance. The varied structure of the strata, sometimes a firm sandstone, then apudding stone, is remarkably well displayed in this view. Summit County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00031 ID. Jackson, W.H. 31 The Great Eastern, a perpendicular bluff 1,000 feet in height, bearing a strong resemblance to the prowof an enormous steamship. In this the inclination of the strata is well shown. The base is composed of fine sandstone, running into a coarse conglomerate above. Summit County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00032 ID. Jackson, W.H. 32 Looking down Echo Canyon from above the Great Eastern, and about two miles above the mouth of the canyon, giving a general view. On the right, the high perpendicular walls, with the strata dipping down westward, are cleft by deep gorges, leaving the intermediate portions standing out like huge castles, massive inform and a vivid red in coloring. On the left, the hills are equally high, but run off into more rounded forms, which are clothed in the springtime with a bright contrasting green. Summit County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00033 ID. Jackson, W.H. 33 The Amphitheater, an immense semicircular wall of 1,000 feet in height, three miles above the mouth of Echo Canyon, showing the largest and most perfect wall surface in the canyon. Summit County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00034 ID. Jackson, W.H. 34 A study among the rocks of Echo Canyon, a mass of debris which has fallen from the overhanging walls. Summit County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00035 ID. Jackson, W.H. 35 Devils Gate in Weber Canyon. Weber County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00036 ID. Jackson, W.H. 36 Devils Gate Bridge. The most attractive feature of the canyon is the roar of the waters of the Weber as they roll over the immense masses of rock in its bed, with the rush and tumult of a mountain torrent. For 4 miles we are enclosed with nearly perpendicular walls of gneiss, 2,000 feet in height, forming the central portion of the Wasatch Mountains; the river rushing through it at right angles. The rocks are beautifully banded everywhere. There are also coarse aggregations of quartz and feldspar all along the sides of this channel; and high up on the steep mountain flanks are vast deposits of boulders and fine sand. Weber County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00037 ID. Jackson, W.H. 37 Devils Gate Bridge. The most attractive feature of the canyon is the roar of the waters of the Weber as they roll over the immense masses of rock in its bed, with the rush and tumult of a mountain torrent. For 4 miles we are enclosed with nearly perpendicular walls of gneiss, 2,000 feet in height, forming the central portion of the Wasatch Mountains; the river rushing through it at right angles. The rocks are beautifully banded everywhere. There are also coarse aggregations of quartz and feldspar all along the sides of this channel; and high up on the steep mountain flanks are vast deposits of boulders and fine sand. Weber County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00038 ID. Jackson, W.H. 38 Devils Gate Bridge. The most attractive feature of the canyon is the roar of the waters of the Weber as they roll over the immense masses of rock in its bed, with the rush and tumult of a mountain torrent. For 4 miles we are enclosed with nearly perpendicular walls of gneiss, 2,000 feet in height, forming the central portion of the Wasatch Mountains; the river rushing through it at right angles. The rocks are beautifully banded everywhere. There are also coarse aggregations of quartz and feldspar all along the sides of this channel; and high up on the steep mountain flanks are vast deposits of boulders and fine sand. Weber County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00039 ID. Jackson, W.H. 39 Devils Gate Bridge. The most attractive feature of the canyon is the roar of the waters of the Weber as they roll over the immense masses of rock in its bed, with the rush and tumult of a mountain torrent. For 4 miles we are enclosed with nearly perpendicular walls of gneiss, 2,000 feet in height, forming the central portion of the Wasatch Mountains; the river rushing through it at right angles. The rocks are beautifully banded everywhere. There are also coarse aggregations of quartz and feldspar all along the sides of this channel; and high up on the steep mountain flanks are vast deposits of boulders and fine sand. Weber County, Utah. 1869. #1:/Jackson W.H. Collection-jack1872/jwh00040 ID. Jackson, W.H. 40 Helena. A lively, thriving city of about 5,000 inhabitants, sustained chiefly by the mining operation scarried on extensively all about it. Lewis and Clark County, Montana. 1872. #1:/Jackson W.H. Collection-jack1869/jwh00041 ID. Jackson, W.H. 41 Great Salt Lake City. A view looking south from the bluffs just north of the city, giving a bird's-eyeview and also a view of the Wasatch Mountains in the distance. Salt Lake County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00042 ID. Jackson, W.H. 42 Great Salt Lake City. A view looking south from the bluffs just north of the city. The eye catches at once the glistening white dome of the great Mormon Tabernacle. Salt Lake County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00043 ID. Jackson, W.H. 43 Great Salt Lake City. A view looking south from the bluffs just north of the city. Shows the suburbs to the southwest, with glimpses of the Jordan Valley, and the Oquirrh Mountains. Salt Lake County, Utah. 1869. #1:/Jackson W.H. Collection-jack1872/jwh00044 ID. Jackson, W.H. 44 Hydraulic mining in Alder Gulch, near Virginia City. Madison County, Montana. 1872. #1:/Jackson W.H. Collection-jack1869/jwh00045 ID. Jackson, W.H. 45 Corinne, at the head of Salt Lake, and on Bear River, near its entrance to the lake; an important place on the railroad, as being the point of departure for Montana, Idaho, etc. Here the stages and freight teams depart upon their long journeys, and their arrival and departure create considerable stir in the otherwise very quiet little place. Box Elder County, Utah. 1869. #1:/Jackson W.H. Collection-jack1871/jwh00046 ID. Jackson, W.H. 46 Rendezvous camp, at Fort A.D. Russell, near Cheyenne. Laramie County, Wyoming. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00047 ID. Jackson, W.H. 47 Ogden Canyon 3 miles above its mouth. A narrow gorge cut through the rocks, with walls 1,500 to 2,000 feet in height, the roadway being built up from the bed of the creek. In the center of the view, a cone-like mass of quartzites, most distinctly and beautifully stratified, stands up at an angle of 55 degrees and 100 feet high. A very interesting geological picture. Weber County, Utah. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00048 ID. Jackson, W.H. 48 First camp of the survey at Ogden, close under the Wasatch Mountains. A marked feature in the mountain, included in our view, is an exposure of 1,000 feet or so of quartzites and limestone, bent up into anarch, the rocky sides of the mountain being so denuded as to show the stratification very distinctly. Elevation of camp plateau 4,488 feet. Weber County, Utah. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00049 ID. Jackson, W.H. 49 Camp near the head of Cache Valley, looking south, 75 miles north of Ogden. The valley is about 60 miles in length and 7 miles width. Is well settled with six or eight Mormon villages, and a total population of some 10,000. Elevation 4,624 feet. Cache County, Utah. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00050 ID. Jackson, W.H. 50 Camp near the head of Cache Valley, looking south, 75 miles north of Ogden. The valley is about 60 miles in length and 7 miles width. Is well settled with six or eight Mormon villages, and a total population of some 10,000. Elevation 4,624 feet. Cache County, Utah. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00051 ID. Jackson, W.H. 51 Bear River Crossing, head of Cache Valley, 80 miles from Ogden. Utah. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00052 ID. Jackson, W.H. 52 Fort Hall, north from Ogden 176 miles. Elevation 4, 724 feet. Located in a beautiful grassy valley, among the foothills on the south side of Snake River. It is 40 miles above the site of old Fort Hall, located on the banks of the river. Bingham County, Idaho. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00053 ID. Jackson, W.H. 53 Snake river, looking up from Taylor's Bridge, 26 miles west from Fort Hall. The river here rushes through a narrow channel of dark, nearly black basalt. Our view was taken in the spring, when the channel was full. In the fall, when the river is low, it reveals deep canyon-like walls about 100 feet below the surface. Power County, Idaho. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00054 ID. Jackson, W.H. 54 Camp on Gooseberry Creek, north slope of Red Rock Pass, with a view of the mountain ridges that separate Cache from Malade Valley. Elevation 4,706 feet. Idaho. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00055 ID. Jackson, W.H. 55 Pleasant Valley. A small valley, of not more than 200 acres in extent, just south of the main Rocky Mountain Divide. It is 275 miles north from Ogden; elevation, 6,236 feet. The divide is 4 miles to the north, and is but 250 feet higher. Idaho. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00056 ID. Jackson, W.H. 56 Red Rock Mountains, from the junction on the Overland Stage Line, 293 miles from Ogden; elevation of valley, 6,329 feet. They are a portion of the main Rocky Mountain Divide, separating Idaho from Montana. Idaho. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00057 ID. Jackson, W.H. 57 Red Rock Mountains, from the junction on the Overland Stage Line, 293 miles from Ogden; elevation of valley, 6,329 feet. They are a portion of the main Rocky Mountain Divide, separating Idaho from Montana. Idaho. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00058 ID. Jackson, W.H. 58 Mount Garfield. The highest summit in the Red Rock Mountains, being 9,704 feet above the sea. Idaho. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00059 ID. Jackson, W.H. 59 A view in the Devil's Passway, showing a portion of the canyon through quartzites and sandstone, with a basalt toping. Bannock County, Idaho. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00060 ID. Jackson, W.H. 60 Camp on the Passamire, or Stinking Water, one of the main branches of the Jefferson, showing a glimpse of the snow-clad mountains bordering the Madison, and among which are its sources. Montana? 1871. #1:/Jackson W.H. Collection-jack1871/jwh00061 ID. Jackson, W.H. 61 Hydraulic mining near Virginia City. Alder Gulch is 16 miles in length, rising in the mountains near Madison river at an altitude of 7,500 feet. The view shows the manner of washing away the sides of the gulch into the sluice-boxes, where the gold is collected. Madison County, Montana. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00062 ID. Jackson, W.H. 62 Hydraulic mining near Virginia City. Alder Gulch is 16 miles in length, rising in the mountains near Madison River at an altitude of 7,500 feet. A flume is laid upon the bedrock, in the bottom of the gulch, and the waters of the creek brought through it, carrying with its current the auriferous sands. Madison County, Montana. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00063 ID. Jackson, W.H. 63 Camps of the Geological Survey, near Fort Ellis, preparatory to moving over on the Yellowstone. Gallatin County, Montana. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00064 ID. Jackson, W.H. 64 Camps of the Geological Survey, near Fort Ellis, preparatory to moving over on the Yellowstone. Gallatin County, Montana. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00065 ID. Jackson, W.H. 65 Mystic Lake, distant view from the trail. The first glimpse as we approach it. Gallatin County, Montana. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00066 ID. Jackson, W.H. 66 View down the creek a short distance below Mystic Lake. The creek falls very rapidly, some 500 feet in less than half a mile. Gallatin County, Montana. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00067 ID. Jackson, W.H. 67 View down the creek a short distance below Mystic Lake. The creek falls very rapidly, some 500 feet in less than half a mile. Gallatin County, Montana. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00068 ID. Jackson, W.H. 68 Valley of the Yellowstone River above Livingston, looking south from the first canyon. On the left the Yellowstone or Snowy Range stands out in bold relief, the eye following it up to Emigrant Peak 30 miles away. The river winds among groves of cottonwood through a broad lake-like valley, of from 3 to 5 miles in width, until it fades away in the distance, forming one of the most attractive views in the catalog. Park County, Montana. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00069 ID. Jackson, W.H. 69 The second canyon of the Yellowstone River above Minor, from its upper end, looking down. Park County, Montana. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00070 ID. Jackson, W.H. 70 Approach to Cinnabar Mountain, from below, looking up the Yellowstone from the standpoint of photograph no. 69. Park County, Montana. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00071 ID. Jackson, W.H. 71 View of Cinnabar Mountain and the Devil's Slide on the Yellowstone, 10 miles above the second canyon. It is a mountain of alternate beds of limestone, sandstone, quartzites and volcanic dikes, elevated to a very nearly vertical position, with the softer strata so worn away as to leave the harder and more enduring ridges standing. View includes only the central portion of the long series of ridges. Prominent among them are two parallel walls, 50 feet apart and 200 feet in height, running up the mountain side 1,500 feet. Between the walls on one side is a band of bright vermilion-tinted clay, which has been mistaken for cinnabar, and hence the name Cinnabar Mountain. Park County, Montana. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00072 ID. Jackson, W.H. 72 View of Cinnabar Mountain and the Devil's Slide on the Yellowstone, 10 miles above the second canyon. It is a mountain of alternate beds of limestone, sandstone, quartzites and volcanic dikes, elevated to a very nearly vertical position, with the softer strata so worn away as to leave the harder and more enduring ridges standing. View includes only the central portion of the long series of ridges. Prominent among them are two parallel walls, 50 feet apart and 200 feet in height, running up the mountain side 1,500 feet. Between the walls on one side is a band of bright vermilion-tinted clay, which has been mistaken for cinnabar, and hence the name Cinnabar Mountain. Park County, Montana. 1871. #1:/Yellowstone National Park/jwh00073 ID. Jackson, W.H. 73 Yellowstone National Park, Wyoming. Group of upper basins, a few miles above the junction of Gardner River with the Yellowstone River. The series comprise the principal portion of the basins termed fancifully by some as Diana's Bathing Pools. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00074 ID. Jackson, W.H. 74 Yellowstone National Park, Wyoming. Group of upper basins, a few miles above the junction of Gardner River with the Yellowstone River. The series comprise the principal portion of the basins termed fancifully by some as Diana's Bathing Pools. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00075 ID. Jackson, W.H. 75 Yellowstone National Park, Wyoming. Large spring upon the summit, near the outer margin of the main terrace, supplying the bathing pools in photos jwh00073 and jwh00074 with their water. Its dimensions are 25 by 40 feet. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00076 ID. Jackson, W.H. 76 Yellowstone National Park, Wyoming. Group of springs upon the same level with the great boiling spring in photo jwh00075, of less activity, but greater beauty in form and tint. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00077 ID. Jackson, W.H. 77 Yellowstone National Park, Wyoming. Oblong fissured ridge, about 150 yards long, 6 to 10 feet high and 10 to 15 feet broad at the base. The fissure runs from one end to the other and is from 6 to 12 inches wide, from which steam issues in considerable quantities. The inner portion of the shell is lined with a hard, white enamel-like porcelain, covered with beautiful crystals of sulfur that have been gathered from the surging and seething caldron of sulfurated steam rising from it. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00078 ID. Jackson, W.H. 78 Yellowstone National Park, Wyoming. Tower Falls, viewed from near the base. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00079 ID. Jackson, W.H. 79 Yellowstone National Park, Wyoming. Tower Creek. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00080 ID. Jackson, W.H. 80 Yellowstone National Park, Wyoming. Tower Creek. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00081 ID. Jackson, W.H. 81 Yellowstone National Park, Wyoming. Column Rocks on the east bank of the Yellowstone, a short distance below the mouth of Tower Creek, forming one side of a deep, narrow canyon. The walls are about 600 feet in height and have two rows of basaltic columns, each one of which is about 25 feet in height and each column 5 feet in diameter. Between these two layers, which are 208 feet apart, are beds that seem, from their bright yellow color, to have a large amount of sulfur in their composition. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00082 ID. Jackson, W.H. 82 Yellowstone National Park, Wyoming. Lower Falls of the Yellowstone River, viewed from the east side of the canyon. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00083 ID. Jackson, W.H. 83 Yellowstone National Park, Wyoming. Upper Falls of the Yellowstone River, near the view from the east side of the canyon. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00084 ID. Jackson, W.H. 84 Yellowstone National Park, Wyoming. Upper Falls of the Yellowstone River, viewed from the top of the canyon, just above the Lower Falls. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00085 ID. Jackson, W.H. 85 Yellowstone National Park, Wyoming. Upper Falls of the Yellowstone River, near the view from the west side. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00086 ID. Jackson, W.H. 86 Yellowstone National Park, Wyoming. Grand Canyon of the Yellowstone, looking down from over the Lower Falls, west side. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00087 ID. Jackson, W.H. 87 Yellowstone National Park, Wyoming. Grand Canyon of the Yellowstone, viewed from the east bank. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00088 ID. Jackson, W.H. 88 Yellowstone National Park, Wyoming. Grand Canyon of the Yellowstone, viewed from the east bank. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00089 ID. Jackson, W.H. 89 Yellowstone National Park, Wyoming. Grand Canyon of the Yellowstone, viewed from the east bank. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00090 ID. Jackson, W.H. 90 Yellowstone National Park, Wyoming. Grand Canyon of the Yellowstone, viewed from the east side, 1 mile below the falls, looking down. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00091 ID. Jackson, W.H. 91 Yellowstone National Park, Wyoming. Walls of the Grand Canyon of the Yellowstone, viewed from below. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00092 ID. Jackson, W.H. 92 Yellowstone National Park, Wyoming. Rapids above the Upper Falls of the Yellowstone River, immediately above the falls, showing the narrow rock-bound channel. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00093 ID. Jackson, W.H. 93 Yellowstone National Park, Wyoming. Rapids above the Upper Falls of the Yellowstone River. View is a quarter of a mile farther up the stream from photo jwh00092, showing the huge, detached masses of basalt that have been left standing in the middle of the river.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00094 ID. Jackson, W.H. 94 Yellowstone National Park, Wyoming. At Crater Hills, 10 miles above the falls, on the east side of the Yellowstone River, in the center of a most interesting group of hot springs, is a magnificent sulfur spring. The deposits around it are silica and enamel like the finest porcelain. The thin edges of the nearly circular rim extend over the waters of the basin several feet, the open portion being 15 feet in diameter. The water is in a constant surface, covered with a sort of pearl-like beadwork, giving it great beauty. 1871. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00095 ID. Jackson, W.H. 95 Yellowstone National Park, Wyoming. Mud Springs at Crater Hills near Sulphur Spring. The contents of this spring are a fine, siliceous, pearl-colored mud, the consistency of thick, hasty pudding. The surface is covered with puffs of mud, which, as they burst, give off a thud-like noise, and then the paint-like liquid recedes from the center of the puffs in a perfect series of rings to the side. The explosion is produced by the escape of sulfurated hydrogen gas through the mud. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00096 ID. Jackson, W.H. 96 Yellowstone National Park, Wyoming. Crater of Mud Geyser. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00097 ID. Jackson, W.H. 97 Yellowstone National Park, Wyoming. Mud Geyser in action. The only true mud geyser discovered, 8 miles below Yellowstone Lake. It has a funnel-shaped orifice in the center of a basin 150 feet in diameter and in which there are two other hot mud springs. The flow of the geyser is regularly every six hours, the eruptions lasting about fifteen minutes. The thick, muddy water rises gradually in the crater, commencing to boil when about half-way to the surface, and occasionally breaking forth with great violence. When the crater is filled, it is expelled from it in a splashing, scattered mass, 10 feet in diameter, to 40 feet in height. The mud is a dark lead-color and deposits itself all about the rim of the crater. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00098 ID. Jackson, W.H. 98 Yellowstone National Park, Wyoming. Yellowstone Lake, looking south from where the river leaves it, and showing the larger portion or the body of the lake. It is some 22 miles long from north to south and about 10 to 15 miles in width from east to west, with an elevation of 7,427 feet above tidewater. In shape, it is aptly compared to the human hand; the northern portion would constitute the palm, while the southern areas might represent the fingers. Careful soundings gave the greatest depth at 300 feet. When calm, the waters reflect the sky in the most delicate and beautiful ultramarine lines; but when stormy and lashed by the strong winds of this high altitude, it resembles in its white-capped breakers and heavy rolling surf some of our larger inland seas. The lake is plentifully stocked with salmon and trout, their numbers being almost incredible, and averaging 2 pounds in weight. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00099 ID. Jackson, W.H. 99 Yellowstone National Park, Wyoming. Survey camp upon the large southwest arm of Yellowstone Lake. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00100 ID. Jackson, W.H. 100 Yellowstone National Park, Wyoming. Survey camp upon the large southwest arm of Yellowstone Lake. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00101 ID. Jackson, W.H. 101 Yellowstone National Park, Wyoming. Survey camp upon the large southwest arm of Yellowstone Lake. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00102 ID. Jackson, W.H. 102 Yellowstone National Park, Wyoming. Survey camp upon the large southwest arm of Yellowstone Lake. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00103 ID. Jackson, W.H. 103 Yellowstone National Park, Wyoming. Group of hot spring basins. Their great beauty lies almost wholly in the exquisite color they possess. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00104 ID. Jackson, W.H. 104 Yellowstone National Park, Wyoming. Head of Yellowstone Lake, the Upper Yellowstone, and the bay into which it empties, viewed from the high hills on the east side of the southeast arm, near where the Upper Yellowstone empties into the lake. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00105 ID. Jackson, W.H. 105 Yellowstone National Park, Wyoming. Mount Doane and Mount Stevenson. Mount Doane is 10,118 feet above sea level and Mount Stevenson is a few feet lower, situated some 6 or 8 miles east of the southeast arm of Yellowstone Lake. They are the fragments of the rim of an immense crater. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00106 ID. Jackson, W.H. 106 Yellowstone National Park, Wyoming. Earthquake camp, near Steamboat Point, on the east side of Yellowstone Lake, so named from several slight shocks of earthquake which were experienced at this place on the night of August 19, 1871. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00107 ID. Jackson, W.H. 107 Yellowstone National Park, Wyoming. Pelican's Roost, near Steamboat Point, a detached mass of the hot spring deposit, which has been cut off from the mainland by the action of the waves and left in the lake 10 feet from the shore. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00108 ID. Jackson, W.H. 108 Yellowstone National Park, Wyoming. Crater of Castle Geyser in Upper Geyser Basin bearing a strong resemblance to an old castle, but of the purest white marble. The main portion is composed of very thin laminae of silica. View is from the side opposite the river. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00109 ID. Jackson, W.H. 109 Yellowstone National Park, Wyoming. Crater of Castle Geyser in Upper Geyser Basin, viewed from the riverside. Here we see the peculiar crystallization of the silica in large globular masses, like spongiform corals, and running off into the usual exquisite beadwork to the laminated base. The entire mound is about 40 feet in height. On the right, close to its base, is a small but very active and turbulent little geyser, probably an offshoot from the greater one. In the center of the view, and the most striking object in it, is the beautiful hot spring, with elegantly carved border and water of the clearest turquoise blue. It is nearly circular, about 25 feet in diameter and funnel-shaped, passing down to a depth of 60 feet in the center. The water is of almost unnatural clearness, and the varying depth gives a most beautiful gradation of color. It has a constant temperature of 172 degrees. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00110 ID. Jackson, W.H. 110 (6x9) Yellowstone National Park, Wyoming. Crater of Giant Geyser, located about a quarter of a mile below Castle Geyser in Upper Geyser Basin. It is about 10 feet in diameter at its base and 12 feet in height, with an orifice of about 3 feet in diameter. It projects a column of water to a height of from 125 to 150 feet, the eruptions lasting about two hours. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00111 ID. Jackson, W.H. 111 Yellowstone National Park, Wyoming. Grotto Geyser in Upper Geyser Basin in eruption, throwing an immense body of water, but not more than 40 feet in height. The great amount of steam given off almost entirely conceals the jets of water. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00112 ID. Jackson, W.H. 112 Yellowstone National Park, Wyoming. Lake on the Divide east of Yellowstone Lake. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00113 ID. Jackson, W.H. 113 Yellowstone National Park, Wyoming. Hunters, Jose and Joe Clark, returning from a successful hunt, their pack animal laden with elk meat. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00114 ID. Jackson, W.H. 114 Yellowstone National Park, Wyoming. Survey party, with pack train, en route upon the trail between the Yellowstone River and East Fork, showing the manner in which all parties traverse these wilds. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00115 ID. Jackson, W.H. 115 Yellowstone National Park, Wyoming. Cone of an extinct hot spring or geyser upon the east fork of the Yellowstone River. A very curious mammiform mound, of about 40 feet in height, built up by overlapping layers like Liberty Cap on Gardner River. The material is principally calcareous. No water issues from the cone at the present time, and none of the springs in the immediate vicinity are above the ordinary temperature of brook water.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00116 ID. Jackson, W.H. 116 Yellowstone National Park, Wyoming. Cone of an extinct hot spring or geyser upon the east fork of the Yellowstone River. A very curious mammiform mound, of about 40 feet in height, built up by overlapping layers like Liberty Cap on Gardner River. The material is principally calcareous. No water issues from the cone at the present time, and none of the springs in the immediate vicinity are above the ordinary temperature of brook water.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1871/jwh00117 ID. Jackson, W.H. 117 Extinct Soda Spring Basin. About 3 miles up the valley of a small tributary of the Bear River we come to a most remarkable formation, consisting of the basins of old springs long extinct. They are called the "petrifying springs" by the settlers, from the abundance of calcareous tufa which exists in the basins. Some of them are 6 feet in depth, and contain large masses of plants coated with a calcareous material, which retains perfectly the form of the leaf and stem. Caribou County, Idaho. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00118 ID. Jackson, W.H. 118 An outburst of igneous material about 5 miles above the entrance to the canyon. It has assumed the nearly columnar form of basalt, and is weathered into sharp pinnacles. Bannock County, Idaho. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00119 ID. Jackson, W.H. 119 Geological Survey camp at Fort Hall. Bingham County, Idaho. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00120 ID. Jackson, W.H. 120 Geological Survey camp, 25 miles south of Fort Hall, at Three Springs. Bannock County, Idaho. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00121 ID. Jackson, W.H. 121 Soda Spring on Bear River. At the Big Bend of Bear River are located the most interesting group of soda springs known on the continent, occupying an area of about 6 square miles. They are now few in number, and simply the remnants of former greatness. On the opposite side of the river in the above view are thesteam vents, to which Fremont gave the name of Steamboat Springs, from the noise they make like a low-pressure engine. Near by is a spring, with an orifice brightly stained with a brilliant yellow coating of oxide of iron, from which the water is thrown up 2 feet by a succession of impulses. Caribou County, Idaho. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00122 ID. Jackson, W.H. 122 Hooper's Spring, of the same nature as the others in the vicinity, but with a more copious escape of carbonic acid gas, and is a favorite with those seeking these health giving waters. Caribou County, Idaho. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00123 ID. Jackson, W.H. 123 Extinct Soda Spring Basin. About 3 miles up the valley of a small tributary of the Bear River we come to a most remarkable formation, consisting of the basins of old springs long extinct. They are called the "petrifying springs" by the settlers, from the abundance of calcareous tufa which exists in the basins. Some of them are 6 feet in depth, and contain large masses of plants coated with a calcareous material, which retains perfectly the form of the leaf and stem. Caribou County, Idaho. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00124 ID. Jackson, W.H. 124 Bear Lake, about halfway between Soda Springs, and Evanston, 10 miles in length, and from 5 to 8 in breadth. The boundary line between Idaho and Utah passes directly across the lake from east to west. It is a beautiful lake, set like an emerald among the mountains, and not even the Yellowstone presents such exquisite coloring. The elevation is 5,911 feet. Bear Lake County, Idaho. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00125 ID. Jackson, W.H. 125 Bear Lake, about halfway between Soda Springs and Evanston, 10 miles in length, and from 5 to 8 inbreadth. The boundary line between Idaho and Utah passes directly across the lake from east to west. It is a beautiful lake, set like an emerald among the mountains, and not even the Yellowstone presents such exquisite coloring. The elevation is 5,911 feet. Rich County, Utah. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00126 ID. Jackson, W.H. 126 Bear Lake, about halfway between Soda Springs and Evanston, 10 miles in length, and from 5 to 8 in breadth. The boundary line between Idaho and Utah passes directly across the lake from east to west. It is a beautiful lake, set like an emerald among the mountains, and not even the Yellowstone presents such exquisite coloring. The elevation is 5,911 feet. Rich County, Utah. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00127 ID. Jackson, W.H. 127 Evanston coal mines, about 1 mile from the town of the same name, on the Union Pacific Railroad. These beds are the largest and most extensively worked in the west. The vein is from 22 to 23 feet in thickness, cropping out from the side of the mountains, with a dip of 10 degrees north of east. Uinta County, Wyoming. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00128 ID. Jackson, W.H. 128 Evanston coal mines, about 1 mile from the town of the same name, on the Union Pacific Railroad. These beds are the largest and most extensively worked in the west. The vein is from 22 to 23 feet in thickness, cropping out from the side of the mountains, with a dip of 10 degrees north of east. Uinta County, Wyoming. 1871. #1:/Jackson W.H. Collection-jack1872/jwh00129 ID. Jackson, W.H. 129 Gateway, Garden of the Gods, within 3 or 4 miles of Colorado City. A great wall of sandstone running up to 350 feet in height, through the center of which is a natural gateway of some 200 feet in width. El Paso County, Colorado. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00130 ID. Jackson, W.H. 130 Looking south from the Garden of the Gods, toward Cheyenne Mountain, an outlying spur, east of Pikes Peak. El Paso County, Colorado. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00131 ID. Jackson, W.H. 131 Glen Eyrie, a picturesque gorge through which Camp Creek cuts its way to its junction with Fountain Creek, at Colorado City. El Paso County, Colorado. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00132 ID. Jackson, W.H. 132 Golden City. View from the foothills west of the city, looking east over the broad basaltic tables, flanking Clear Creek upon either side. Jefferson County, Colorado. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00133 ID. Jackson, W.H. 133 Distant view of Golden City. View from the foothills west of the city, looking east over the broad basaltic tables, flanking Clear Creek upon either side. Jefferson County, Colorado. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00134 ID. Jackson, W.H. 134 Clear Creek Canyon. The route of the Colorado Central Narrow Gauge Railroad to Blackhawk and Georgetown. One of the most grandest and most picturesque canyons of the many which cut the foothill range at rightangles. Jefferson County, Colorado. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00135 ID. Jackson, W.H. 135 Clear Creek Canyon. The route of the Colorado Central Narrow Gauge Railroad to Blackhawk and Georgetown. One of the most grandest and most picturesque canyons of the many which cut the foothill range at rightangles. Jefferson County, Colorado. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00136 ID. Jackson, W.H. 136 Clear Creek Canyon. The route of the Colorado Central Narrow Gauge Railroad to Blackhawk and Georgetown. One of the most grandest and most picturesque canyons of the many which cut the foothill range at rightangles. Jefferson County, Colorado. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00137 ID. Jackson, W.H. 137 Clear Creek Canyon. The route of the Colorado Central Narrow Gauge Railroad to Blackhawk and Georgetown. One of the most grandest and most picturesque canyons of the many which cut the foothill range at rightangles. Jefferson County, Colorado. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00138 ID. Jackson, W.H. 138 Clear Creek Canyon. The route of the Colorado Central Narrow Gauge Railroad to Blackhawk and Georgetown. One of the most grandest and most picturesque canyons of the many which cut the foothill range at rightangles. Jefferson County, Colorado. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00139 ID. Jackson, W.H. 139 Canyon cascade in Waterfall Canyon, near Ogden. A cascade of some 300 feet, running down overbeautifully-stratified white quartzites. Above it rises Ogden Mountain to a height of 9,716 feet. Weber County, Utah. 1872. (Stero view available as photo no. 1663) #1:/Jackson W.H. Collection-jack1872/jwh00140 ID. Jackson, W.H. 140 Ogden. From the same standpoint from which Jackson, W.H. 139 was made, looking down into Salt Lake Valley over Ogden, distant about 3 miles, to Salt Lake and Promontory Point in the extreme distance. Weber County, Utah. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00141 ID. Jackson, W.H. 141 Looking north from the tableland back of Ogden, showing the spur of the Wasatch Mountains, under which lie the Hot Springs. Weber County, Utah. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00142 ID. Jackson, W.H. 142 Head of Little Cottonwood Canyon, looking up from Central City. The canyon is about 10 miles in length, rising in the very summit of the Wasatch Mountains, and comes out upon Salt Lake Valley 17 miles south of Salt Lake City. It is noted as a mining region, there being some of the richest silver mines in the west located upon the sides of these mountains. The little mining town included in the view has an elevation of over 10,000 feet, and snow lies in the streets until long into summer. The view was made June 20, yet the snow lies so thickly as to render the roads nearly impassable. Salt Lake County, Utah.1872. #1:/Jackson W.H. Collection-jack1872/jwh00143 ID. Jackson, W.H. 143 Head of Little Cottonwood Canyon, looking up from Central City. The canyon is about 10 miles in length,rising in the very summit of the Wasatch Mountains, and comes out upon Salt Lake Valley 17 miles south of Salt Lake City. It is noted as a mining region, there being some of the richest silver mines in the west located upon the sides of these mountains. The little mining town included in the view has an elevation of over 10,000 feet, and snow lies in the streets until long into summer. The view was made June 20, yet the snow lies so thickly as to render the roads nearly impassable. Salt Lake County, Utah. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00144 ID. Jackson, W.H. 144 Looking down Little Cottonwood Canyon from Central. It is from the precipitous sides of the canyon, as shown on the left, that the frequent avalanches or snow slides occur, with such fatal results to those who may be caught by them. Salt Lake County, Utah. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00145 ID. Jackson, W.H. 145 Granite Peak, Little Cottonwood Canyon, about halfway down. It rises nearly 3,000 feet above the creek at its foot, and is a solid mass of the beautiful granite characteristic of the canyon. Salt Lake County, Utah. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00146 ID. Jackson, W.H. 146 Quarrying granite in Cottonwood Canyon, 17 miles south of Salt Lake City, for the Mormon Tabernacle. The ground is completely strewn with immense boulders and detached masses of granite, which have fallen down from the walls of the canyon on either side, some of which are from 30 to 40 feet square. All the quarrying is confined to splitting up these blocks. Salt Lake County, Utah. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00147 ID. Jackson, W.H. 147 View of the Wasatch Mountains from the Twin Peaks to the spur that separates Salt Lake from Utah Lake. The Twin Peaks fall but a little short of being the highest in the range, not far from 12,000 feet above the sea. Salt Lake County, Utah. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00148 ID. Jackson, W.H. 148 View of the Wasatch Mountains from the Twin Peaks to the spur that separates Salt Lake from Utah Lake. The twin Peaks fall but a little short of being the highest in the range, not far from 12,000 feet above the sea. Salt Lake County, Utah. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00149 ID. Jackson, W.H. 149 Willard Canyon, in the above spur of the Wasatch Mountains. Box Elder County, Utah. 1872. #1:/Jackson W.H. Collection-jack1869/jwh0014a ID. Jackson, W.H. 14a Rock pinnacles (or forms) near Green River Station. Sweetwater County, Wyoming. 1869. #1:/Jackson W.H. Collection-jack1872/jwh00150 ID. Jackson, W.H. 150 Willard City, 15 miles north from Salt Lake, a Mormon village of some 900 souls. Over the village a glimpse of Bear River Bay, of Salt Lake, is possible. Box Elder County, Utah. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00151 ID. Jackson, W.H. 151 Bear River Hotel and Bridge, the crossing on the line of the old stage line from Ogden to Montana. Box Elder County, Utah. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00152 ID. Jackson, W.H. 152 Panoramic view of Malade, from the bluffs back of the town, looking south down the valley; a Mormon settlement of about 1,200 inhabitants. Oneida County, Idaho. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00153 ID. Jackson, W.H. 153 Panoramic view of Malade, from the bluffs back of the town, looking south down the valley; a Mormon settlement of about 1,200 inhabitants. Oneida County, Idaho. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00154 ID. Jackson, W.H. 154 Portneuf Canyon, looking down from the great bend, about midway in the canyon. Canyon illustrates the immense basaltic overflow, filling the valley as level as a floor, contrasting finely with the bold mountain outlines upon either side. The creek cuts closely up to the beds, exposing an upright wall of columnar basalt for a number of miles. Bannock County, Idaho. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00155 ID. Jackson, W.H. 155 Portneuf Canyon, looking down from the great bend, about midway in the canyon. Canyon illustrates the immense basaltic overflow, filling the valley as level as a floor, contrasting finely with the bold mountain outlines upon either side. The creek cuts closely up to the beds, exposing an upright wall of columnar basalt for a number of miles. Bannock County, Idaho. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00157 ID. Jackson, W.H. 157 Portneuf Canyon, looking up from same standpoint as Jackson, W.H. 154 - 155. Bannock County, Idaho. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00158 ID. Jackson, W.H. 158 Portneuf Mountains, lying to the east of the canyon. They are covered with a thick mantle of snow, which fell during the night of the 2nd of July. Bannock County, Idaho. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00159 ID. Jackson, W.H. 159 Crater Buttes, or extinct volcanoes, on Henrys Fork, near its junction with Snake River. They are prominent landmarks for many miles along the line of the stage road. The larger one of the two, as shown in the view, rises about 500 feet above the plain, upon a base about one and one-half miles in diameter. Its crater is about one-half of a mile in diameter, and 150 feet deep. Fremont County, Idaho. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00160 ID. Jackson, W.H. 160 Kenilworth Castle, Henrys Fork. A mass of volcanic sandstone, lying near the base of the butte, that has been washed away to its present form; is about 50 feet high and 100 feet long. Fremont County, Idaho. 1872. #1:/Grand Teton National Park/jwh00161 ID. Jackson, W.H. 161 Grand Teton National Park, Wyoming. Teton Range, viewed from a point about 7 miles away. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Grand Teton National Park/jwh00162 ID. Jackson, W.H. 162 Grand Teton National Park, Wyoming. The Three Tetons, viewed from a prominent point, looking across the left-hand canyon of West Teton River and over the broad snow-covered plateau extending up to the foot of the Tetons. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1872/jwh00163 ID. Jackson, W.H. 163 The Teton Range. Lincoln County, Wyoming. 1872. #1:/Grand Teton National Park/jwh00164 ID. Jackson, W.H. 164 Grand Teton National Park, Wyoming. Teton Range, northeast. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1872/jwh00165 ID. Jackson, W.H. 165 The Teton Range, northwest. Lincoln County, Wyoming. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00166 ID. Jackson, W.H. 166 View in the Teton Range, looking west from a point about 3 miles from the Tetons, and from the edge of the great canyon that separates them from the abutting quartzites. Lincoln County, Wyoming. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00167 ID. Jackson, W.H. 167 View northeast in Teton Range, showing the sharply serrated peaks lying north of the Great Canyon. Lincoln County, Wyoming. 1872. #1:/Grand Teton National Park/jwh00168 ID. Jackson, W.H. 168 Grand Teton National Park, Wyoming. Looking southeast, showing the two lesser Tetons and the head of the Great Canyon. In the foreground is the edge of the precipice that drops perpendicularly 2,000 feet to the canyon below. 1872. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Photos jwh00168 and jwh00169 form a panorama. #1:/Grand Teton National Park/jwh00169 ID. Jackson, W.H. 169 Grand Teton National Park, Wyoming. Teton Range. Looking south across the great snow-covered plateau, thickly scattered with rugged and precipitous mountain peaks.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Photos jwh00168 and jwh00169 form a panorama. #1:/Jackson W.H. Collection-jack1872/jwh00170 ID. Jackson, W.H. 170 Studies among the Great Tetons of the Snake River. A view looking down the South Fork of Teton Canyon, 3 miles above the junction. Lincoln County, Wyoming. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00171 ID. Jackson, W.H. 171 Moose camp of the photographers, in the Teton Canyon, 3 miles above its mouth. So named from the killing of three moose close by. One of the small ones is hanging by the tent. Lincoln county, Wyoming. 1872. #1:/Grand Teton National Park/jwh00172 ID. Jackson, W.H. 172 Grand Teton National Park, Wyoming.W.H. Jackson and Charles R. Campbell taking photographs in the Tetons. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1872/jwh00173 ID. Jackson, W.H. 173 Camp of the Geological Survey, on the North Fork of Snake River. Second day from the Teton, going north. Fremont County, Idaho. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00174 ID. Jackson, W.H. 174 (Panorama) Henrys Lake, a shallow body of water, about 3 by 2 miles in diameter, and full of small, scattered islands, and the source of Henrys Fork. It is well stocked with most excellent trout. At this point are four remarkable passes through the range, Tyghee and Red Rock, on the east and west; Raynolds, or the Madison, on the north; and Henrys Lake, on the south. Elevation of lake, 6,492 feet; Tyghee Pass, 7,063 feet; Red Rock Pass, 7,271 feet; Raynolds, 7,911 feet. The view is taken from the north, looking south, over Sawtell's ranch. Fremont County, Idaho. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00175 ID. Jackson, W.H. 175 (Panorama) Henrys Lake, a shallow body of water, about 3 by 2 miles in diameter, and full of small, scattered islands, and the source of Henrys Fork. It is well stocked with most excellent trout. At this point are four remarkable passes through the range, Tyghee and Red Rock, on the east and west; Raynolds, or the Madison, on the north; and Henrys Lake, on the south. Elevation of lake, 6,492 feet; Tyghee Pass, 7,063 feet; Red Rock Pass, 7,271 feet; Raynolds, 7,911 feet. The view is taken from the north, looking south, over Sawtell's ranch. Fremont County, Idaho. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00176 ID. Jackson, W.H. 176 (Panorama) Panoramic view of Henrys Lake, from a point on the east side, between Raynolds and Tyghee Passes, embracing a view from Raynolds Pass, on the right, past Red Rock and Henrys Lake Passes, to Tyghee on the left. In the center is Sawtells Peak, a well-defined extinct volcano. 10,600 feet in height, with a crater 1,000 feet in depth, and one and one-half miles across its longest diameter. Fremont County, Idaho. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00177 ID. Jackson, W.H. 177 (Panorama) Panoramic view of Henrys Lake, from a point on the east side, between Raynolds and Tyghee Passes, embracing a view from Raynolds Pass, on the right, past Red Rock and Henrys Lake Passes, to Tyghee on the left. In the center is Sawtells Peak, a well-defined extinct volcano. 10,600 feet in height, with acrater 1,000 feet in depth, and one and one-half miles across its longest diameter. Fremont County, Idaho. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00178 ID. Jackson, W.H. 178 (Panorama) Panoramic view of Henrys Lake, from a point on the east side, between Raynolds and Tyghee Passes, embracing a view from Raynolds Pass, on the right, past Red Rock and Henrys Lake Passes, to Tyghee on the left. In the center is Sawtells Peak, a well-defined extinct volcano. 10,600 feet in height, with a crater 1,000 feet in depth, and one and one-half miles across its longest diameter. Fremont County, Idaho. 1872. #1:/Yellowstone National Park/jwh00179 ID. Jackson, W.H. 179 Yellowstone National Park, Wyoming. Down the Upper Firehole River. 1872. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1872/jwh00180 ID. Jackson, W.H. 180 Sawtell's ranch, at the northern end of Henrys Lake. Messrs. Sawtell and Wurtz, the pioneers of this region, have built themselves very comfortable quarters by the side of a very fine, large spring. They catch large quantities of fish from the lake, for which they find a ready market in Virginia City and the mining towns. Large game of all kinds is abundant. (Steroview available as photo 1564). Fremont county, Idaho. 1872. #1:/Yellowstone National Park/jwh00181 ID. Jackson, W.H. 181 Yellowstone National Park, Wyoming. Great Hot Springs, midway between the Upper and Lower Basins of the Firehole River and on the west side. A vast accumulation of siliceous matter, built up 50 feet above the river, upon the summit of which are three large boiling springs, the largest being 250 feet in diameter. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00182 ID. Jackson, W.H. 182 Yellowstone National Park, Wyoming. Mud puffs, or Hot Mud Spring, in Lower Firehole Basin, a mass of pure white boiling mud, sputtering at a lively rate, and throwing it out all around, forming the raised bank about it. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00183 ID. Jackson, W.H. 183 Yellowstone National Park, Wyoming. Crater of Architectural Geyser in Lower Firehole Basin at the upper end of a valley extending from Firehole River. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00184 ID. Jackson, W.H. 184 Yellowstone National Park, Wyoming. Upper Firehole Basin looking up river. Upon either side are high siliceous banks, bordered with numerous hot springs and ornamental bordering. In the distance is a glimpse of Beehive Geyser in eruption. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00185 ID. Jackson, W.H. 185 Yellowstone National Park, Wyoming. Crater of Castle Geyser in Upper Geyser Basin, viewed from between it and the beautiful hot spring lying next to the river. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00186 ID. Jackson, W.H. 186 Yellowstone National Park, Wyoming. Beautiful hot spring and the crater of Castle Geyser in Upper Geyser Basin. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00187 ID. Jackson, W.H. 187 Yellowstone National Park, Wyoming. Crater of Old Faithful Geyser in Upper Geyser Basin, so named from the regularity of its eruptions, occurring once an hour with but very slight variations. It has built up a mount about 20 feet in height with some most beautiful cauliflower-like formations, exquisitely beaded with thousands of pearls. When wet after the eruptions, each one glistens and sparkles like the real gem. The orifice is about 3 feet in diameter. 1872. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00188 ID. Jackson, W.H. 188 Yellowstone National Park, Wyoming. Old Faithful Geyser in Upper Geyser Basin in eruption, giving a good idea of the force and grandeur of the uplift to a height of approximately 150 feet. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00189 ID. Jackson, W.H. 189 Yellowstone National Park, Wyoming. Crater of Beehive Geyser on the opposite side of the river from Castle Geyser and Old Faithful Geyser in Upper Geyser Basin. Beehive is a very symmetrical cone about 5 feet in height and 6 feet in diameter at its base. It is most beautifully beaded all over its exterior surface with small pearl-like drops of silica. Its eruptions are of great force, throwing a stream fully 20 feet in height and holding it up with perfect steadiness for a period of from ten to fifteen minutes. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). See also photo jwh01575. #1:/Yellowstone National Park/jwh00191 ID. Jackson, W.H. 191 Yellowstone National Park, Wyoming. Crater of the Grand Geyser, nearly opposite Castle Geyser in Upper Geyser Basin, and so named from the great force and power it displays in its eruptions, varying from 150 to 250 feet in height. For a space of 10 feet about the crater, the surface is adorned with beautifully scalloped little reservoirs filled with the clear, transparent waters from the geyser. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00192 ID. Jackson, W.H. 192 Yellowstone National Park, Wyoming. Castle Geyser in Upper Geyser Basin in eruption, viewed from across the river, near the Giantess, about 750 yards distant. This eruption lasted fully two hours and averaged 10 feet in height. It was accompanied by a loud rumbling noise and shook the earth nearby. In the foreground is one of the small hot springs, so numerous throughout the basin. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00193 ID. Jackson, W.H. 193 Yellowstone National Park, Wyoming. Castle Geyser in Upper Geyser Basin in eruption, viewed from across the river, near the Giantess, about 750 yards distant. This eruption lasted fully two hours and averaged 10 feet in height. It was accompanied by a loud rumbling noise and shook the earth nearby. In the foreground is one of the small hot springs, so numerous throughout the basin. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00194 ID. Jackson, W.H. 194 Yellowstone National Park, Wyoming. Turban Geyser in Upper Geyser Basin, adjoining Grand Geyser within a few feet, the ornamentations about them being identical. The eruptions are not very great, not more than 20 by 30 feet in height. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00195 ID. Jackson, W.H. 195 Yellowstone National Park, Wyoming. Crater of Grotto Geyser in Upper Geyser Basin, showing the beading and crystalline whiteness of the whole mass. 1872. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00196 ID. Jackson, W.H. 196 Yellowstone National Park, Wyoming. Hot Spring Basin, beautifully scalloped and beaded. It is about 5 feet in diameter. Occasionally it overruns its basin and then recedes to a considerable depth, but never ejecting its waters as violently as a geyser. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00197 ID. Jackson, W.H. 197 Yellowstone National Park, Wyoming. Group of Lower Geyser Basins on the main terrace. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00198 ID. Jackson, W.H. 198 Yellowstone National Park, Wyoming. Upper Geyser Basin on the main terrace. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00199 ID. Jackson, W.H. 199 Yellowstone National Park, Wyoming. Upper Geyser Basins on the main terrace. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00200 ID. Jackson, W.H. 200 Yellowstone National Park, Wyoming. Upper Geyser Basins on the main terrace. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00201 ID. Jackson, W.H. 201 Yellowstone National Park, Wyoming. Groups of small, flowing springs and sulfur vents, back of Great Central Hot Spring. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00202 ID. Jackson, W.H. 202 Yellowstone National Park, Wyoming. Small, flowing springs and sulfur vents, back of the Great Central Hot Spring. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00203 ID. Jackson, W.H. 203 Yellowstone National Park, Wyoming. Groups of small, flowing springs and sulfur vents, back of the Great Central Hot Spring. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00204 ID. Jackson, W.H. 204 Yellowstone National Park, Wyoming. Liberty Cap in the Mammoth Hot Springs area. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00205 ID. Jackson, W.H. 205 Yellowstone National Park, Wyoming. Falls on the right fork of the Gardner River, in a deep, dark, almost impenetrable gorge, about two miles above the springs. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00206 ID. Jackson, W.H. 206 Yellowstone National Park, Wyoming. Falls on the left fork of the Gardner River, 3 miles above the springs, in a deep gorge across the end of which is a basaltic wall over which tumbles an 80-foot cascade. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00207 ID. Jackson, W.H. 207 Yellowstone National Park, Wyoming. Falls on the left fork of the Gardner River, 3 miles above the springs, in a deep gorge across the end of which is a basaltic wall over which tumbles an 80-foot cascade. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1872/jwh00208 ID. Jackson, W.H. 208 Bridger Canyon, near Fort Ellis. Bridger Creek cuts down deep through beautifully stratified limestones, exposing perfectly vertical walls on the northern side. Gallatin County, Montana. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00209 ID. Jackson, W.H. 209 Bridger Canyon, near Fort Ellis. Bridger Creek cuts down deep through beautifully stratified limestones, exposing perfectly vertical walls on the northern side. Gallatin County, Montana. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00210 ID. Jackson, W.H. 210 The Needle in Bridger Canyon. A detached mass of rock, weathered into a sharp pinnacle. Gallatin County, Montana. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00211 ID. Jackson, W.H. 211 The Needle in Bridger Canyon. A detached mass of rock, weathered into a sharp pinnacle. Gallatin County, Montana. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00212 ID. Jackson, W.H. 212 Major Pease's ranch, on the Yellowstone, 3 miles above the First Canyon. Large droves of cattle are herded here, and as the winters are comparatively mild, require but little care throughout the whole year. Montana. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00213 ID. Jackson, W.H. 213 Valley of the Yellowstone, looking south from the First Canyon. Park County, Montana. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00214 ID. Jackson, W.H. 214 Valley of the Yellowstone, looking south from the First Canyon. Park County, Montana. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00215 ID. Jackson, W.H. 215 Mystic Lake, looking up from the promontory extending out into the lake, about midway on the right hand side. Gallatin County, Montana. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00216 ID. Jackson, W.H. 216 Mystic Lake, from same place as Jackson, W.H. 215, looking down toward the outlet. Gallatin County, Montana. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00217 ID. Jackson, W.H. 217 Arched Falls, directly under the Twin Buttes, on the Gallatin River. The river abounds for nearly its whole length in falls, cascades, and rapids. The above is in a deep, dark gorge, flowing over a dike of basaltic rock, and under a natural archway thrown out from the top to the bottom of the falls is about 30 feet in height. Gallatin County, Montana. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00218 ID. Jackson, W.H. 218 Falls near the head of Middle Fork of the Gallatin River. Gallatin County, Montana. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00219 ID. Jackson, W.H. 219 View in Middle Creek Canyon, near Palace Butte, showing its southern face. Gallatin County, Montana. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00220 ID. Jackson, W.H. 220 Head of Middle Creek, near Bozeman. A view showing the large amphitheater filled with snow, and from which Middle Creek finds its sources. Gallatin County, Montana. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00221 ID. Jackson, W.H. 221 View near the mouth of West Gallatin Canyon. A limestone mountain on the east side of the canyon, lying directly upon the volcanic rocks, an exposed face bordering the river, showing the line of junction. Gallatin County, Montana. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00222 ID. Jackson, W.H. 222 View near the mouth of West Gallatin Canyon. A limestone mountain on the east side of the canyon, lying directly upon the volcanic rocks, an exposed face bordering the river, showing the line of junction. Gallatin County, Montana. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00223 ID. Jackson, W.H. 223 Trail through the woods of West of Gallatin Canyon. Gallatin County, Montana. 1872. #1:/Yellowstone National Park/jwh00224 ID. Jackson, W.H. 224 Yellowstone National Park, Wyoming. Bluffs on the head of the West Gallatin about 60 miles above the mouth of the canyon. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00225 ID. Jackson, W.H. 225 Yellowstone National Park, Wyoming. Canyon of the upper Madison River, between Gibbons' Fork and Firehole River. It is here that a long series of swift cascades flow between vertical walls of trachytic rock. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00226 ID. Jackson, W.H. 226 Yellowstone National Park, Wyoming. It is here that a long series of swift cascades flow between vertical walls of trachytic rock. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00227 ID. Jackson, W.H. 227 Yellowstone National Park, Wyoming. Madison River below the great middle canyon. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1872/jwh00229 ID. Jackson, W.H. 229 Pulpit Rock, in one of the small side canyons of the Middle Canyon of the Madison. A detached mass of limestone from the mountain side, about 150 feet in height, pulpit-like in form. Gallatin County, Montana. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00230 ID. Jackson, W.H. 230 View looking up toward the Middle Canyon of the Madison, from below. Gallatin County, Montana. 1872. #1:/Yellowstone National Park/jwh00231 ID. Jackson, W.H. 231 Yellowstone National Park, Wyoming. Crater of Great Fountain Geyser in Lower Geyser Basin. 1883(?). #1:/Yellowstone National Park/jwh00232 ID. Jackson, W.H. 232 Yellowstone National Park, Wyoming. Crater of Old Faithful Geyser in Upper Geyser Basin. 1883(?). #1:/Yellowstone National Park/jwh00233 ID. Jackson, W.H. 233 Yellowstone National Park, Wyoming. Crater of Castle Geyser in Upper Geyser Basin. 1883(?). #1:/Yellowstone National Park/jwh00234 ID. Jackson, W.H. 234 Yellowstone National Park, Wyoming. Fountain Geyser in Lower Geyser Basin. 1883(?). #1:/Yellowstone National Park/jwh00235 ID. Jackson, W.H. 235 Yellowstone National Park, Wyoming. Crested Hot Springs with Old Faithful Geyser in the distance. 1883(?). #1:/Yellowstone National Park/jwh00236 ID. Jackson, W.H. 236 Yellowstone National Park, Wyoming. Lone Star Geyser in Lone Star Geyser Basin. 1883(?). #1:/Yellowstone National Park/jwh00237 ID. Jackson, W.H. 237 Yellowstone National Park, Wyoming. Grotto Geyser in Upper Geyser Basin. 1883(?). #1:/Yellowstone National Park/jwh00238 ID. Jackson, W.H. 238 Yellowstone National Park, Wyoming. Giantess Geyser in Upper Geyser Basin. 1883(?). #1:/Yellowstone National Park/jwh00239 ID. Jackson, W.H. 239 Yellowstone National Park, Wyoming. Crested Hot Springs and Castle Geyser in Upper Geyser Basin. 1883(?). #1:/Yellowstone National Park/jwh00240 ID. Jackson, W.H. 240 Yellowstone National Park, Wyoming. Little Firehole Falls. 1883(?). #1:/Yellowstone National Park/jwh00241 ID. Jackson, W.H. 241 Yellowstone National Park, Wyoming. Crater of Excelsior Geyser in Midway Geyser Basin. 1883(?). #1:/Yellowstone National Park/jwh00242 ID. Jackson, W.H. 242 Yellowstone National Park, Wyoming. Crater of Castle Geyser in Upper Geyser Basin. 1883(?). #1:/Yellowstone National Park/jwh00243 ID. Jackson, W.H. 243 Yellowstone National Park, Wyoming. Kepler Cascades on Firehole River. 1883(?). #1:/Yellowstone National Park/jwh00244 ID. Jackson, W.H. 244 Yellowstone National Park, Wyoming. Lone Star Geyser in Lone Star Geyser Basin. 1883(?). #1:/Jackson W.H. Collection-jack1870/jwh00245 ID. Jackson, W.H. 245 Laramie Peak from near the head of the Big Cottonwood. Albany County, Wyoming. 1870 #1:/Jackson W.H. Collection-jack1870/jwh00246 ID. Jackson, W.H. 246 A view of the Sweetwater near the three crossings. Shows the burial place of a soldier in 1862. Mr.S.R. Gifford, the artist, is at the left of the picture and the camp of the Survey is in the distance. Fremont County, Wyoming. 1870. #1:/Yellowstone National Park/jwh00247 ID. Jackson, W.H. 247 Yellowstone National Park, Wyoming. Rendezvous camp at Fort D.A. Russell near Cheyenne where the survey was organized and equipped for field service. 1870. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1870/jwh00248 ID. Jackson, W.H. 248 Laramie Peak, view from a distance. Albany County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00249 ID. Jackson, W.H. 249 Looking out upon the plains, from near the head of Horse Creek, the shoreline and bed of an ancient lake, showing the effects of the erosive force from the mountains plainwards. Laramie County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00250 ID. Jackson, W.H. 250 S.R. Gifford, artist, seated. Castellated rocks on the Chugwater. A very conspicuous feature which we notice in descending the valley of the Chugwater is the high bluff of Lower Cretaceous sandstone, which stretches away toward the northeast like a huge wall. The jointage is so regular that it presents the appearance of massive mason work gradually falling to decay. The sides of these sandstone walls are from40 to 60 feet perpendicular, sometimes overhanging, large masses of which have broken off and fallen to the base. Their most striking feature, however, is to weather into most picturesque castellated forms. The valley of the Chugwater is 100 miles long, and is a favorite place to winter stock. Platte County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00251 ID. Jackson, W.H. 251 Castellated rocks on the Chugwater. A very conspicuous feature which we notice in descending the valley of the Chugwater is the high bluff of Lower Cretaceous sandstone, which stretches away toward the northeast like a huge wall. The jointage is so regular that it presents the appearance of massive masonwork gradually falling to decay. The sides of these sandstone walls are from 40 to 60 feet perpendicular, sometimes overhanging, large masses of which have broken off and fallen to the base. Their most striking feature, however, is to weather into most picturesque castellated forms. The valley of the Chugwater is 100 miles long, and is a favorite place to winter stock. Platte County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00252 ID. Jackson, W.H. 252 Castellated rocks on the Chugwater. A very conspicuous feature which we notice in descending the valley of the Chugwater is the high bluff of Lower Cretaceous sandstone, which stretches away toward the northeast like a huge wall. The jointage is so regular that it presents the appearance of massive masonwork gradually falling to decay. The sides of these sandstone walls are from 40 to 60 feet perpendicular, sometimes overhanging, large masses of which have broken off and fallen to the base. Their most striking feature, however, is to weather into most picturesque castellated forms. The valley of the Chugwater is 100 miles long, and is a favorite place to winter stock. Platte County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00253 ID. Jackson, W.H. 253 Laramie River and Valley, looking northeast. Platte County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00254 ID. Jackson, W.H. 254 Badlands on Laramie River. From the Chugwater, we cross table-like plains for 10 miles, and descend to the beautiful valley of the Laramie. The Tertiary rocks near the crossing have weathered into quite remarkable architectural forms, much like those of White River of Dakota. The texture is similar also, with marls and calcareous concretions, passing up into fine sandstone, which decompose so readily that valleys and the hills are covered with loose sand. Platte County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00255 ID. Jackson, W.H. 255 Granite rocks, near eastern base of Laramie Peak. As we approach the bast of the mountains, the red feldspathic granites rise in thick picturesque ridges, 50 to 100 feet high, like ruined walls, lending a peculiar as well as picturesque appearance to the landscape. The granites afford most excellent rock studies of their kinds. The tendency to weather into rounded forms by exfoliation and the jointing are finely shown. The principal lines of fracture are mostly continuous, and have a strike east and west, while the other set trend nearly north and south. The tendency to exfoliate by the stripping off of their concentric layers has enlarged the openings, sometimes several feet. The granites are thus divided inregular rhomboidal masses, many of which have fallen down at the foot of the ridges, and by exfoliation have become so rounded that they appear like immense transported boulders. The texture of the rock isan aggregate of large crystals of reddish feldspar, with quartz and mica, the feldspar so predominating that it gives the character to the rock. Albany County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00256 ID. Jackson, W.H. 256 Fort Fetterman, named for Lieutenant Colonel William I. Fetterman, killed at the Fort Phil Kearney massacre, December 21, 1866. Established July 19, 1867, and garrisoned by four companies of infantry. Is situated at the mouth of La Prele Creek, 135 miles north from Cheyenne, and 70 miles from Fort Laramie. It marks the junction of the Powder River (route to Montana) and North Platte. Converse County, Wyoming. 1870? #1:/Jackson W.H. Collection-jack1870/jwh00257 ID. Jackson, W.H. 257 Laramie Peak.S.R. Gifford and Dr.F.V. Hayden in the picture. Albany County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00258 ID. Jackson, W.H. 258 Granite ridges near the eastern base of Laramie Peak. Albany County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00259 ID. Jackson, W.H. 259 Granite ridges near the eastern base of Laramie Peak. Albany County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00260 ID. Jackson, W.H. 260 Granite ridges near the eastern base of Laramie Peak. Albany County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00261 ID. Jackson, W.H. 261 The foothills of Laramie Peak, and characteristic of the rest of the range. Albany County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00262 ID. Jackson, W.H. 262 Camp at Grotto Spring. Converse County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00263 ID. Jackson, W.H. 263 Camp on the La Bonte Creek. Converse County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00264 ID. Jackson, W.H. 264 Cottonwoods on the La Bonte Creek. Converse County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00265 ID. Jackson, W.H. 265 Ford across the La Bonte. A very pleasant and picturesque feature of the La Bonte are the beautifulmeadow-like valleys, covered with a luxuriant growth of grass, and the magnificent cottonwoods, with wide-spreading branches and dense foliage, while all about are dry, parched, sage-covered hills.S.R. Giffordin center. Converse County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00266 ID. Jackson, W.H. 266 Natural Bridge in the Canyon of the La Prele, near Fort Fetterman. View from below. Converse County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00267 ID. Jackson, W.H. 267 Natural Bridge, La Prele Canyon, view from above. A most marvelous natural curiosity, rivaling its famous namesake in Virginia. It is situated in La Prele Canyon, about 10 miles south from Fort Fetterman, on the North Platte. The canyon is formed by the passage of the creek through a long range that extends from La Bonte to the Red Buttes. Where the La Prele emerges from the canyon, it cuts through the limestone and red beds at right angles, forming a regular gorge, with walls from 50 to 150 feet in height. At the head of this gorge the stream has at sometime changed its bed, passing directly through a point of rocks that extend across the channel. The old bed is now overgrown with trees and bushes, but is 50 feet higher than the present one. The stream must have changed its course, bringing its waters against this rock, and finding a fissure opening through it, gradually wore its present channel. It is as perfect a bridge as could be desired. The opening beneath is about 150 feet wide and 50 feet high. The arch above forms a perfect span from a greater tower on one hand to the old bed of the creek on the other. Converse County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00268 ID. Jackson, W.H. 268 Fort Fetterman, named for Lieutenant Colonel William I. Fetterman, killed at the Fort Phil Kearney massacre, December 21, 1866. Established July 19, 1867, and garrisoned by four companies of infantry. Is situated at the mouth of La Prele Creek, 135 miles north from Cheyenne, and 70 miles from Fort Laramie. Converse County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00269 ID. Jackson, W.H. 269 Fort Laramie, named after an old trapper, was established in 1849, and was once a trading post of the Northwestern Fur Company. It is noted as being the place where many important treaties have been made with the Indians. Situated on the Laramie River, about 2 miles above its junction with the North Platte, and on the line of the old Overland Road to Oregon and California. Goshen County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00270 ID. Jackson, W.H. 270 Camp on Box Elder Creek, 12 miles west from Fort Fetterman, and but a short distance above its junction with the North Platte. Contrasting well with the rugged features of the ridge are the smooth terrace-like benches or tables, remnants, probably, of some higher levels not swept away. Converse County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00271 ID. Jackson, W.H. 271 Box Elder Canyon affords a good section through the main ridge, being a much more regular gorge than the canyon of the La Prele. It is from 600 to 800 feet in depth, entirely of erosion, and so narrow that it is difficult to pass through it on foot, the side walls being perpendicular and sometimes overhanging. The predominating rocks are calcareous sandstones and some layers of quite fine limestones, with a great variety of texture. Converse County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00272 ID. Jackson, W.H. 272 Box Elder Canyon affords a good section through the main ridge, being a much more regular gorge than the canyon of the La Prele. It is from 600 to 800 feet in depth, entirely of erosion, and so narrow that it is difficult to pass through it on foot, the side walls being perpendicular and sometimes overhanging. The predominating rocks are calcareous sandstones and some layers of quite fine limestones, with a great variety of texture. Converse County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00273 ID. Jackson, W.H. 273 Camp on the North Platte near the present site of Casper and the old "upper crossing" or "Mormon crossing" of the North Platte, 34 miles from Fort Fetterman. Natrona County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00274 ID. Jackson, W.H. 274 Badlands near Casper Mountain. There is here a considerable area covered with light gray sandstones, which have weathered into most unique forms. They resemble the ruins of some old village, with portions of the stone walls and the chimneys remaining. Natrona County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00275 ID. Jackson, W.H. 275 View from Casper Mountain, from near its east end. This mountain is an immense table, that has been lifted nearly horizontally out of the plain some 800 or 1,000 feet. Our view is taken from it, lookingout upon the plains toward the Platte, showing the gradual dying away of the hogbacks and terraces into the level valley. Natrona County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00276 ID. Jackson, W.H. 276 View looking towards Red Buttes and Casper Mountain from the valley of Poison Spider Creek. Natrona County, Wyoming. 1870? #1:/Jackson W.H. Collection-jack1870/jwh00277 ID. Jackson, W.H. 277 View of the Red Buttes at what is now known as Bessemer Bend, a notable point on the old Oregon Trail where the Oregon Trail left the North Platte River for the Sweetwater. The approximate location of a massacre of 23 U.S. Troopers in 1865, which occurred at the same time as the death of Casper Collins at that bridge, for whom the town of Casper was named. Natrona County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00278 ID. Jackson, W.H. 278 Camp at Red Buttes. Northwest end of Casper Mountain. Our camp at the Red Buttes was pleasantly located on the broad grassy bottoms of the Platte, in a sort of amphitheater, with the red beds rising to a great elevation all around. The Red Buttes are so called from the high ridges, or groups of ridges, on the south side of the Platte, their basset edges bearing eastward toward out camp, and of a bright brick red in color. As we approach them from the east, in the afternoon, the rays of the setting sun greatly heighten their effect and bring them out in strong relief, so that we can readily see why they have been such prominent landmarks, and have so long attracted the attention of the traveler. Natrona County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00279 ID. Jackson, W.H. 279 Jackson Canyon, now known as Sheep Canyon. A dry gorge, cut down perpendicularly through the limestones some 300 or 400 feet. Tensleep and Madison rocks exposed. At northwest end of Casper Mountain. Natrona County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00281 ID. Jackson, W.H. 281 View across the North Platte, from above Jackson Canyon, distinctly showing an amphitheater, or upheaved ridge of the red beds, forming a half circle. View taken from west end of Casper Mountain. Natrona County, Wyoming. 1870. #1:/Yellowstone National Park/jwh00282 ID. Jackson, W.H. 282 Wyoming. Group of all the members of the Survey, made while in camp at Red Buttes at the junction of the North Platte and Sweetwater Rivers. Standing left to right: John "Potato John" Raymond and "Val," cooks; Sanford R. Gifford, landscape painter; Henry W. Elliott, artist; James Stevenson, assistant; H.D. Schmidt, naturalist; E. Campbell Carrington, zoologist; L.A. Bartlett, general assistant; William Henry Jackson, photographer. Sitting left to right: C.S. Turnbull, secretary; J.H. Beaman, meteorologist; Ferdinand.V. Hayden, geologist in charge; Cyrus Thomas, agriculturist; Raphael, hunter; A.L. Ford, mineralogist. 1870.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). See also photo jwh00283. #1:/Yellowstone National Park/jwh00283 ID. Jackson, W.H. 283 Wyoming. Group of all the members of the Survey, made while in camp at Red Buttes at the junction of the North Platte and Sweetwater Rivers. Standing left to right: John "Potato John" Raymond and "Val," cooks; Sanford R. Gifford, landscape painter; Henry W. Elliott, artist; James Stevenson, assistant; H.D. Schmidt, naturalist; E. Campbell Carrington, zoologist; L.A. Bartlett, general assistant; William Henry Jackson, photographer. Sitting left to right: C.S. Turnbull, secretary; J.H. Beaman, meteorologist; Ferdinand V. Hayden, geologist in charge; Cyrus Thomas, agriculturist; Raphael, hunter; A.L. Ford, mineralogist. August 24, 1870. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). See also photo jwh00282. #1:/Jackson W.H. Collection-jack1870/jwh00284 ID. Jackson, W.H. 284 View from the summit of Independence Rock, looking down the Sweetwater Valley, and showing plainly ;that all this portion of the valley was at one time the bed of a great lake. Fort Ridge on the right. View extends to upper end of Pathfinder Reservoir. Natrona County, Wyoming. 1870 #1:/Jackson W.H. Collection-jack1870/jwh00285 ID. Jackson, W.H. 285 Independence Rock. A noted landmark, on the Oregon Trail, for travelers at the time when this route was used. Its base, bordering the old road, is literally covered with names and dates, many of the former well known in the history of the west, and some of them antedating Fremont's time. The Sweetwater flows immediately along the southern end of it, although on the opposite side of the stream another ridge, continuing toward the southwest, was once connected with it. It is a vast and excellent illustration of disintegration, its rounded form resembling an oblong haystack, with layers of rock lapping over the top and sides of the mass. This layers have been broken off in part, and huge masses are scattered all around it. On some portions of the side they lap down to the ground with so gentle a descent that one can walkup to the top without difficulty. Measured by the odometer, the rock has a circumference of 1,550 yards. The north end is 103 feet in height and the opposite end 167 feet, with a depression in the center of not more than 75 feet in height. Natrona County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00286 ID. Jackson, W.H. 286 Independence Rock. A noted landmark, on the Oregon Trail, for travelers at the time when this route was used. Its base, bordering the old road, is literally covered with names and dates, many of the former well known in the history of the west, and some of them antedating Fremont's time. The Sweetwater flows immediately along the southern end of it, although on the opposite side of the stream another ridge, continuing toward the southwest, was once connected with it. It is a vast and excellent illustration of disintegration, its rounded form resembling an oblong haystack, with layers of rock lapping over the top and sides of the mass. This layers have been broken off in part, and huge masses are scattered all around it. On some portions of the side they lap down to the ground with so gentle a descent that one can walkup to the top without difficulty. Measured by the odometer, the rock has a circumference of 1,550 yards. The north end is 103 feet in height and the opposite end 167 feet, with a depression in the center of not more than 75 feet in height. Natrona County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00287 ID. Jackson, W.H. 287 Devils Gate on the Sweetwater. View inside the gorge. A canyon which the Sweetwater seems to have worn through the granite ridge, cutting it at right angles. To one side, but a short distance, is a low natural depression, a few feet above the present bed of the stream, through which it must have once flowed; and the mind is very much perplexed to account for its digression through this great solid wall of granite rock. The current is not strong, finding its way among the huge masses which have fallen down from above without difficulty, and with a gentle, soothing music not common to mountain streams. The walls are vertical, and on the right side about 350 feet high, the other being a very little lower. The distance through is about 300 yards. Fremont County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00288 ID. Jackson, W.H. 288 Looking west from over Devils Gate showing the plains of the Sweetwater, the Oregon Trail, and the Seminole Mountains in the distance. Gifford and Elliott in the foreground. Ambulance below carrying photo working outfit. Devils Gate is a narrow cleft in a granite ridge, 400 feet high, the Sweetwater flowing through it. Fremont County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00289 ID. Jackson, W.H. 289 View on the Sweetwater. The Twin Peaks, now known as Split Rock, with camp in the middle distance, another noted landmark of the Sweetwater Valley, 15 miles west of Devils Gate. These granite ridges lying south of the Sweetwater are said to have suggested the name "Rocky Mountains." Fremont County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00290 ID. Jackson, W.H. 290 The Twin Peaks, near view, now known as Split Rock. Another conspicuous landmark, 15 miles above the Devils Gate, a high peak in the ridge, cleft down the center, dividing it in two nearly to the base. This view shows admirably the lines of fracture or stratification, and their weathering away into cube-like forms. The fissures sometimes are worn away into a width of several feet, and by this means huge massesare detached and left balanced upon the summits of the ridges. Fremont County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00291 ID. Jackson, W.H. 291 Granite Mountains above Devils Gate. Fremont County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00292 ID. Jackson, W.H. 292 Granite Mountains above Devils Gate. View showing how the level sage-covered valley of the Sweetwater juts up squarely to them, impressing the mind with the idea of a great sea or lake. Fremont County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00293 ID. Jackson, W.H. 293 Mummy Rock, at the Three Crossings of the Sweetwater, a noted station and stopping place in the days of wagon trains. These are the last of the granite ridges, and among them we find some very characteristic studies. This rock, which has been carved out of the masses of granite about it by the slow hand of time, readily suggests the name we have given it. It is about 20 feet in height, stands upon a very narrow base, with its sides sloping outward, and upon its shoulders is balanced another rock, forming the head of the mummy. Fremont County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00294 ID. Jackson, W.H. 294 Studies along the summit of the Granite Mountains on the Sweetwater, showing the characteristic lines of fracture and exfoliation. Fremont County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00295 ID. Jackson, W.H. 295 Studies along the summit of the Granite Mountains on the Sweetwater, showing the characteristic lines of fracture and exfoliation. Fremont County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00296 ID. Jackson, W.H. 296 Studies along the summit of the Granite Mountains on the Sweetwater, showing the characteristic lines of fracture and exfoliation. Fremont County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00297 ID. Jackson, W.H. 297 Studies along the summit of the Granite Mountains on the Sweetwater, showing the characteristic lines of fracture and exfoliation. Fremont County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00298 ID. Jackson, W.H. 298 Studies along the summit of the Granite Mountains on the Sweetwater, showing the characteristic lines of fracture and exfoliation. Fremont County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00299 ID. Jackson, W.H. 299 All that remains of the Three Crossings Stage Station at the Three Crossings of the Sweetwater. Buffalo Bill made one of his record rides from Red Butte through this point to St. Marys Station and back, a distance of 322 miles in 24 hours. Fremont County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00300 ID. Jackson, W.H. 300 A view on the Sweetwater near the Three Crossings. Shows the burial place of a soldier in 1862. Mr.S.R. Gifford, the artist, is at the left of the picture and the camp of the Survey is in the distance. Fremont County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00301 ID. Jackson, W.H. 301 South Pass City. South Pass is a gradual elevation, gently rolling and table-like, and one can pass the line of separation between the waters of the two oceans without observing it. In 1867 gold was discovered in richly paying quantities, and caused a great "stampede" or flocking together of all the wandering miners from over the whole country. Under this influx of population these two "cities" South Pass City and Atlantic City sprang up and were for a time lively, bustling towns. The gold is found both in quartzand placers, and is still mined with good profit. South Pass City has an elevation above the sea of 7,857 feet, and Atlantic City 7,665 feet. Fremont County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00302 ID. Jackson, W.H. 302 Atlantic City, South Pass. Fremont County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00303 ID. Jackson, W.H. 303 Beaver Dam Gulch. A stream flowing into the main creek at Atlantic City, the bed of which is completely monopolized by colonies of beavers, which have built a continuous series of dams, from bank to bank, for a distance of 3 or 4 miles. Fremont County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00304 ID. Jackson, W.H. 304 The Wind River Mountains and Fremont Peak from the summit of the Foothill Range, north of South Pass, at an elevation of 10,000 feet above the sea. Far above in the distance rise the snow-capped ridges of the axis of the range with Fremont and Snow Peaks in view. Fremont gives the elevation of Snow Peak as 13,570 feet, and it is the highest in this range. A characteristic feature of these mountains is the dense growth of a species of the nut pine, which furnishes food for innumerable birds and squirrels, and supplies the Indians with their favorite food. Fremont County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00305 ID. Jackson, W.H. 305 Camps on the 10th and 11th of September, near Church Buttes. Uinta County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00306 ID. Jackson, W.H. 306 Badlands on Blacks Fork. A view from the summit of one of the highest points among the Badlands. As far as the eye can reach, upon every side, is a vast extent of most infinite detail. "It looks like some ruined city of the gods, blasted, bare, desolate, but grand beyond a mortal's telling." Uinta County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00307 ID. Jackson, W.H. 307 (Panorama) Badlands on Blacks Fork. We can see in them the very process by which they have been carved into such curious and beautiful forms. Uinta County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00308 ID. Jackson, W.H. 308 (Panorama) Badlands on Blacks Fork. We can see in them the very process by which they have been carved into such curious and beautiful forms. Uinta County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00309 ID. Jackson, W.H. 309 Badlands on Blacks Fork. We can see in them the very process by which they have been carved into such curious and beautiful forms. Uinta County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00310 ID. Jackson, W.H. 310 The Uinta Mountains. View from Photograph Ridge, elevation 10,829 feet. One of the grandest and most perfect mountain views in the west. The foreground is a picturesque group of the mountain pines. In the middle distance, glimmering in the sunlight like a silver thread, is Blacks Fork, meandering through grass, lawn-like parks, the eye following it up to its sources among the ever lasting snows of the summit ridge. The peaks or cones in the distance are most distinctly stratified and apparently horizontal, or nearly so, with their summits far above the limits of perpetual snow, and from 1,500 to 2,000 feet above the springs that give rise to the streams below. Summit County, Utah. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00311 ID. Jackson, W.H. 311 A sawmill in the Unita Mountains. The foothills of the main range are densely clothed with most excellent pines. Judge Carter of Fort Bridger has several steam sawmills located in the thickest groves, and is producing large quantities of lumber. Summit County, Utah. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00312 ID. Jackson, W.H. 312 Camp of the Survey, on the 16th of September, among the pines of the foothills, in the Uinta Mountains, at an elevation of nearly 10,000 feet above the sea. Daggett County, Utah. 1870. (Steroview available) #1:/Jackson W.H. Collection-jack1870/jwh00313 ID. Jackson, W.H. 313 The Uinta Mountains. View from Photograph Ridge, elevation 10,829 feet. One of the grandest and most perfect mountain views in the west. The foreground is a picturesque group of the mountain pines. In the middle distance, glimmering in the sunlight like a silver thread, is Blacks Fork, meandering through grass, lawn-like parks, the eye following it up to its sources among the ever lasting snows of the summitridge. The peaks or cones in the distance are most distinctly stratified and apparently horizontal, or nearly so, with their summits far above the limits of perpetual snow, and from 1,500 to 2,000 feet above the springs that give rise to the streams below. Summit County, Utah. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00314 ID. Jackson, W.H. 314 The Uinta Mountains. View from Photograph Ridge, elevation 10,829 feet. One of the grandest and most perfect mountain views in the west. The foreground is a picturesque group of the mountain pines. In the middle distance, glimmering in the sunlight like a silver thread, is Blacks Fork, meandering through grass, lawn-like parks, the eye following it up to its sources among the everlasting snows of the summitridge. The peaks or cones in the distance are most distinctly stratified and apparently horizontal, or nearly so, with their summits far above the limits of perpetual snow, and from 1,500 to 2,000 feet above the springs that give rise to the streams below. Summit County, Utah. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00315 ID. Jackson, W.H. 315 The Uinta Mountains. View from Photograph Ridge, elevation 10,829 feet. One of the grandest and most perfect mountain views in the west. The foreground is a picturesque group of the mountain pines. In the middle distance, glimmering in the sunlight like a silver thread, is Blacks Fork, meandering through grass, lawn-like parks, the eye following it up to its sources among the everlasting snows of the summitridge. The peaks or cones in the distance are most distinctly stratified and apparently horizontal, or nearly so, with their summits far above the limits of perpetual snow, and from 1,500 to 2,000 feet above the springs that give rise to the streams below. Summit County, Utah. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00316 ID. Jackson, W.H. 316 Haydens Cathedral, Uinta Mountains. Vast piles of purplish compact quartzite, resembling Egyptian pyramids on a gigantic scale, without a trace of soil, vegetation, or water. One of these remarkable structures stands out isolated from the rest, in the middle of the valley of Smiths Fork, which was estimated to rise 1,500 feet above its base, and so much like a Gothic church did it appear that members of the Survey gave it the name of Haydens Cathedral. View shows with remarkable clearness their horizontal stratification. They are as regular as the steps of a pyramid, and as the snow rests upon each step, it relieves them in the strongest manner. Summit County, Utah. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00317 ID. Jackson, W.H. 317 Haydens Cathedral, Uinta Mountains. Vast piles of purplish compact quartzite, resembling Egyptian pyramids on a gigantic scale, without a trace of soil, vegetation, or water. One of these remarkable structures stands out isolated from the rest, in the middle of the valley of Smiths Fork, which was estimated to rise 1,500 feet above its base, and so much like a Gothic church did it appear that members of the Survey gave it the name of Haydens Cathedral. View shows with remarkable clearness their horizontal stratification. They are as regular as the steps of a pyramid, and as the snow rests upon each step, it relieves them in the strongest manner. Summit County, Utah. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00318 ID. Jackson, W.H. 318 Uinta Mountains. A view near the head of the west branch of Blacks Fork, looking south. Summit County, Utah. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00319 ID. Jackson, W.H. 319 Head of Blacks Fork, Uinta Mountains. From the same point as Jackson, W.H. 318, looking west, deep down into the valleys, with their silvery streams finding their way down from the lofty, cone-like, snow-capped summits. Photo nos. 318 - 319 were made just upon the upper limit of arborescent vegetation; showing in the foreground how the thrifty pines of the plains below, up here, have a hard struggle for existence, being dwarfed down to low, trailing shrubs, spread out along the ground, and always toward the east, indicating that the winds upon these mountains are mostly from the west. Summit County, Utah. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00320 ID. Jackson, W.H. 320 The Uinta Mountains. A distant view from the foothills bordering Bear River. Summit County, Utah. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00321 ID. Jackson, W.H. 321 The Uinta Mountains. A distant view from the foothills bordering Bear River. Summit County, Utah. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00322 ID. Jackson, W.H. 322 The Uinta Mountains. A distant view from the foothills bordering Bear River. Summit County, Utah. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00323 ID. Jackson, W.H. 323 Carters Lake, Uinta Mountains. A beautiful sheet of water, enclosed on one side by a semicircular wall of sandstones and slates, and on the other by a dense growth of spruce trees. The depression for the accumulation of the waters of this lake was formed by an immense mass of rock sliding down from the ridges above. The side of the mass opposite the ridge, from which it was detached, would be the highest, forming a rim for the depression. Springs of water ooze out from the sides of the ridge, snows melt, and soon a little lake is formed. This one is 350 yards in length and 80 yards wide; elevation 10,321 feet. There are many such lakes all through the mountains, forming a characteristic feature in its scenery. Summit County, Utah. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00324 ID. Jackson, W.H. 324 Gilberts Peak, Uinta Mountains. A beautiful and instructive view of one of the highest peaks in the Uinta Range, named in honor of General Gilbert, of the regular army. The very plainly marked strata of red sandstones and quartzites incline very slightly to the southeast. The lake in the foreground, of about 50 acres extent, has an elevation of 11,000 feet, and the peak rises abruptly from it 2,250 feet. Summit County, Utah. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00325 ID. Jackson, W.H. 325 El Capitan, in miniature, Uinta Mountains. A perpendicular limestone bluff, about 500 feet in height, where Henrys Fork breaks out from the mountains into the broad, grassy valleys of the foothills. Summit County, Utah. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00327 ID. Jackson, W.H. 327 A camp on Henrys Fork, having as a background a portion of the hogbacks, which rise ridge by ridge to the distant summits of the quartzite nucleus of the Uintas. Daggett County, Utah. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00328 ID. Jackson, W.H. 328 Beaver dams on Henrys Fork. This stream was at one time thickly inhabited by beavers, but they have been driven out by the advance of civilization. There are many left, however, in some of the quiet, secluded nooks, and in such a place we found the subject which affords us so excellent an illustration of their habits. They have here constructed a dam across the channel of the fork, about 50 yards in length and from 3 to 5 feet in height. Daggett County, Utah. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00329 ID. Jackson, W.H. 329 Hogbacks on Henrys Fork, near its junction with Green River. Daggett County, Utah. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00330 ID. Jackson, W.H. 330 A natural cave near Green River, in an upheaved ridge of limestone. It is full of holes and crevices, that give shelter to multitudes of bats and animals. This cave has also been a favorite resort for Indians, as shown by traces of fires, the walls of stone laid up for defense, and the chipped flints and arrowheads scattered about. Daggett County, Utah. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00331 ID. Jackson, W.H. 331 A perpendicular bluff of curiously weathered sandstone opposite the cave. Daggett County, Utah. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00332 ID. Jackson, W.H. 332 The Flaming Gorge, a view on Green River, very near the location where Major Powell launched his expeditions for the Colorado River. View at the mouth of Henrys Fork, of great beauty, and which derives its principal charm from the vivid coloring. The waters of the river are of the purest emerald, with banks and sand bars of glistening white. The perpendicular bluff to the right is nearly 1,500 feet above the level of the river, and of a bright red and yellow. When entrance or gateway to the still greater wonders and grandeurs of the famous Red Canyon, that cuts its way to a depth of 3,000 feet between this point and its entrance into Browns Hole. Man and horse for scale. Daggett County, Utah. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00333 ID. Jackson, W.H. 333 Green River at Browns Hole, below the Red Canyon, calm, quiet, and peaceful, recuperating for the still more turbulent passage of the deeper, gloomier, and longer canyons below. The sandy beach at the left shows the footprints of numerous deer, bears, and elk that frequent these banks. Daggett County, Utah. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00334 ID. Jackson, W.H. 334 A bluff of quartzite, near the mouth of Red Creek, in Browns Hole. Daggett County, Utah. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00335 ID. Jackson, W.H. 335 Scene near the head of the Red Creek, showing a fine exposure of the Tertiary beds. Sweetwater County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00336 ID. Jackson, W.H. 336 A view of the coal-bearing bluffs near Point of Rocks, on Bitter Creek, Union Pacific Railroad, 805 miles west of Omaha, and 6,484 feet above the sea. The veins are about 5 feet thick, cropping out high on the bluff, and with a very slight inclination to the northwest. Sweetwater County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00337 ID. Jackson, W.H. 337 Bluffs on the North Fork of the Platte, near the crossing of the old Overland State road. They are 80 to 100 feet in height, extending along the east bank of the river, and composed of a grayish brown sandstone, exhibiting in a remarkable manner the various signs of shallow water depositions, ripple, rain, and mud markings. Broad, flat masses of rock, lie at the base of the bluff, 15 or 20 feet square, with the surface covered with these peculiar markings. Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00338 ID. Jackson, W.H. 338 Camp on Rock Creek, showing a glimpse of Rock Creek Canyon and the snow-clad spurs of the Medicine Bow Mountains. Carbon County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00339 ID. Jackson, W.H. 339 Camp Farewell, at Fort Sanders, so named as being the last regular camp of the Survey of 1870. Showing merely a few of the members, the tents, and animals of the expedition. Albany County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00340 ID. Jackson, W.H. 340 The Robber's Roost at Virginia Dale, a stage station on the line of the old Overland Route, and which attained an unenviable notoriety during 1860 and 1863, while kept by Jack Slade, a noted desperado of that time. Larimer County, Colorado. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00341 ID. Jackson, W.H. 341 Platte Canyon. A view from the plains, looking up into the canyon, being the exit of the South Platte from the mountain range that separates South Park from the plains. A rugged, precipitous, and inaccessible gorge. Douglas and Jefferson Counties, Colorado. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00342 ID. Jackson, W.H. 342 Pleasant Park, a small picturesque valley, lying between the sandstone ridges, and the mountains near the Colorado Divide. Douglas County, Colorado. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00343 ID. Jackson, W.H. 343 Ute Falls in Ute Pass, where the Fountain qui Bouille is forced through a narrow, precipitous gorge, about 1 mile above the springs. Now, these falls are scarcely distinguishable, as a road has been blasted through the massive granite that forms the walls of the canyon, and the accumulation of debris falling into the stream, and changed its character entirely. El Paso County, Colorado. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00344 ID. Jackson, W.H. 344 Pikes Peak, from near Colorado City, looking up the valley of the Fountain qui Bouille. Elevation of the peak is 14,216 feet. El Paso County, Colorado. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00345 ID. Jackson, W.H. 345 Scene in Monument Park, along Monument Creek, and the small tributaries that flow into it from the west, some of the most singular and unique monument formations to be met with in the whole country, and the view we have noted gives but a faint conception of their beauty. View is upon a small tributary of Monument Creek, about 9 miles above Colorado City. The stream has cut a little valley through a coarse material with layers of irregular deposition, hardened into a compact sandstone. Then comes a thin layer of ironstone, or impure limonite, with now and then this seams of marl or clay, but the whole is a quartzite material, and rather coarse. The light colored sandstones below are weathered into most singular columnar or monument-like forms, with thin layers of rusty sandstone as a cap, protecting the summit. El Paso County, Colorado. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00346 ID. Jackson, W.H. 346 Scene in Monument Park, along Monument Creek, and the small tributaries that flow into it from the west, some of the most singular and unique monument formations to be met with in the whole country, and the view we have noted gives but a faint conception of their beauty. View is upon a small tributary of Monument Creek, about 9 miles above Colorado City. The stream has cut a little valley through a coarse material with layers of irregular deposition, hardened into a compact sandstone. Then comes a thin layer of ironstone, or impure limonite, with now and then this seams of marl or clay, but the whole is a quartzite material, and rather coarse. The light colored sandstones below are weathered into most singular columnar or monument-like forms, with thin layers of rusty sandstone as a cap, protecting the summit. El Paso County, Colorado. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00347 ID. Jackson, W.H. 347 Scene in Monument Park, along Monument Creek, and the small tributaries that flow into it from the west, some of the most singular and unique monument formations to be met with in the whole country, and the view we have noted gives but a faint conception of their beauty. View is upon a small tributary of Monument Creek, about 9 miles above Colorado City. The stream has cut a little valley through a coarse material with layers of irregular deposition, hardened into a compact sandstone. Then comes a thin layer of ironstone, or impure limonite, with now and then this seams of marl or clay, but the whole is a quartzite material, and rather coarse. The light colored sandstones below are weathered into most singular columnaror monument-like forms, with thin layers of rusty sandstone as a cap, protecting the summit. El Paso County, Colorado. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00348 ID. Jackson, W.H. 348 A collection of buffalo, elk, deer, mountain sheep, and wolf skulls and bones, heaped up in monument form, being all collected near Fort Sanders, and shows the abundance of game that once abounded on these plains. Albany County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1875/jwh00349 ID. Jackson, W.H. 349 View from the summit of Sultan Mountain. La Plata County, Colorado. 1875. #1:/Jackson W.H. Collection-jack1875/jwh00350 ID. Jackson, W.H. 350 Navajo Sandstone, Johnson Canyon. Kane County, Utah.n.d. #1:/Jackson W.H. Collection-jack1878/jwh00352 ID. Jackson, W.H. 352 Source of the Popo Agie River, Wind River Mountains. Fremont County, Wyoming. 1878. #1:/Yellowstone National Park/jwh00354 ID. Jackson, W.H. 354 Yellowstone National Park, Wyoming. Old Faithful Geyser in Upper Geyser Basin. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00355 ID. Jackson, W.H. 355 Yellowstone National Park, Wyoming. Great Hot Springs at the upper end of the Lower Geyser Basin. 1878.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00356 ID. Jackson, W.H. 356 Yellowstone National Park, Wyoming. Boiling Mud Spring at Lower Firehole River. 1878.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack18ny/jwh00358 ID. Jackson, W.H. 358 Church in the city of Juarez. Mexico.n.d. #1:/Jackson W.H. Collection-jack1873/jwh00360 ID. Jackson, W.H. 360 Rendezvous camp on Clear Creek, 4 miles northwest from Denver, a delightful spot, in the midst of a grove of cottonwoods, with great wide-spreading arms, resembling the eastern elm. The view is made in early spring, before the trees put forth their leaves. In this camp the members of the Survey collected to organize and equip for the season's campaign. Jefferson County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh00361 ID. Jackson, W.H. 361 Rendezvous camp on Clear Creek, 4 miles northwest from Denver, a delightful spot, in the midst of a grove of cottonwoods, with great wide-spreading arms, remembling the eastern elm. The view is made in early spring, before the trees put forth their leaves. In this camp the members of the Survey collected and organized the equipment for the season's campaign. Jefferson County, Coloroado. 1873. #1:/Yellowstone National Park/jwh00362 ID. Jackson, W.H. 362 Yellowstone National Park, Wyoming. Frozen Waterfall in the Mammoth Hot Springs area. 1878.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Rocky Mountain National Park/jwh00363 ID. Jackson, W.H. 363 Rocky Mountain National Park, Colorado. Longs Peak, viewed from the lower end of Estes Park. 1873.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1873/jwh00365 ID. Jackson, W.H. 365 Mount Lincoln from Hoosier Pass, looking across Montgomery Gulch, to the cap-like summit. Park County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh00366 ID. Jackson, W.H. 366 Panorama from summit of Mount Lincoln. On the left is Mount Bross. Park County, Colorado. 1873. (Panorama with photo nos. 368 - 371) #1:/Yellowstone National Park/jwh00367 ID. Jackson, W.H. 367 Yellowstone National Park, Wyoming. Tower Falls. 1878(?).U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1873/jwh00368 ID. Jackson, W.H. 368 Panorama view from summit of Mount Lincoln. On the left is Montezuma mine. Park County, Colorado. 1873. (Panarama with photo nos. 366, 369-371). #1:/Jackson W.H. Collection-jack1873/jwh00369 ID. Jackson, W.H. 369 Panorama from summit of Mount Lincoln. On the right is Quandary Peak. Park County, Colorado. 1873. (Panorama with photo nos. 366, 368, 370 - 371) #1:/Jackson W.H. Collection-jack1873/jwh00370 ID. Jackson, W.H. 370 Panorama from summit of Mount Lincoln. On the right is Hoosier Pass. Park County, Colorado. 1873. (Panorama with photo nos. 366, 368 - 369, 371) #1:/Jackson W.H. Collection-jack1873/jwh00371 ID. Jackson, W.H. 371 Panorama from summit of Mount Lincoln. View showing Silver Heels, South Park. Park County, Colorado. 1873. (Panorama with photo nos. 366, 368 -370) #1:/Jackson W.H. Collection-jack1873/jwh00372 ID. Jackson, W.H. 372 Head of Montgomery Gulch, as seen from near Hoosier Pass, showing that portion of the range which connects Mount Lincoln with Quandary Peak. Park County, Colorado. 1873. #1:/Yellowstone National Park/jwh00373 ID. Jackson, W.H. 373 Yellowstone National Park, Wyoming. Falls of Yellowstone River. 1878(?). U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1873/jwh00374 ID. Jackson, W.H. 374 Head of Buckskin Gulch, Mosquito Range. About it are many silver mines that are profitably worked. Buckskin Creek is a small tributary of Clear Creek, draining the southern face of Mount Bross and Mount Lincoln. Park County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh00375 ID. Jackson, W.H. 375 The North or right-hand wall of Buckskin Gulch, and the foot of Mount Bross, showing, in a well-defined section, the contact of the quartzites with the gneissic rocks below, and the limestones above. Park County, Colorado. 1873. #1:/Yellowstone National Park/jwh00378 ID. Jackson, W.H. 378 Yellowstone National Park, Wyoming. Cascade Creek.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1873/jwh00379 ID. Jackson, W.H. 379 Looking north from near Horseshoe Mountain, to Mounts Bross and Lincoln, and across Sacramento, Mosquito, and Buckskin Gulches. Park County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh00380 ID. Jackson, W.H. 380 Great moraine on the south side of Clear Creek, at its junction with the Arkansas. Chaffee County, Colorado. 1873. #1:/Yellowstone National Park/jwh00382 ID. Jackson, W.H. 382 Yellowstone National Park, Wyoming. Hayden Valley.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1873/jwh00384 ID. Jackson, W.H. 384 The Upper Twin Lake. Lake County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh00385 ID. Jackson, W.H. 385 Lake Creek Canyon. Lake County, Colorado. 1873. Panorama with photo nos. 386 - 387. #1:/Jackson W.H. Collection-jack1873/jwh00386 ID. Jackson, W.H. 386 Upper Twin Lake. Lake County, Colorado. 1873. Panorama with photo nos. 385, 387. #1:/Jackson W.H. Collection-jack1873/jwh00387 ID. Jackson, W.H. 387 Lower Twin Lake, Buffalo Peak in middle distance. Lake County, Colorado. 1873. Panorama with photo nos. 385 - 386. #1:/Jackson W.H. Collection-jack1873/jwh00388 ID. Jackson, W.H. 388 Natural Bridge on Lake Creek, 3 miles above Twin Lakes, formed by a great granite boulder becoming stranded and suspended over a deep, gorge-like crevice, under which flows the creek. It is the result of glacial action. Lake County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh00389 ID. Jackson, W.H. 389 Falls on Lake Creek, in the same crevice over which hangs the suspended boulder mentioned in Jackson, W.H. 388, this view being made from above, looking down into it, the falls and the bridge being separated only a few yards. Lake County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh00390 ID. Jackson, W.H. 390 A granite buttress 500 feet in height, standing out midway in Lake Creek Valley, the upper face of which has been rounded off and polished by glacial action. Lake County, Colorado. 1873. #1:/Yellowstone National Park/jwh00391 ID. Jackson, W.H. 391 Yellowstone National Park, Wyoming. Geyser. 1878(?).U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1873/jwh00392 ID. Jackson, W.H. 392 Panorama from the summit of La Plata Mountain. La Plata and Montezuma Counties, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh00393 ID. Jackson, W.H. 393 Panorama from the summit of La Plata Mountain. La Plata and Montezuma Counties, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh00394 ID. Jackson, W.H. 394 Panorama from the summit of La Plata Mountain. La Plata and Montezuma Counties, Colorado. 1873. #1:/Yellowstone National Park/jwh00395 ID. Jackson, W.H. 395 Yellowstone National Park, Wyoming. Crater of Great Fountain Geyser in Lower Geyser Basin. 1878(?).U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1873/jwh00396 ID. Jackson, W.H. 396 Panorama from the summit of La Plata Mountain. La Plata and Montezuma Counties, Colorado. 1873. #1:/Jackson W.H. Collection-jack1874/jwh00398 ID. Jackson, W.H. 398 The Rio Grande River at Lost Trail Creek. The stream has become so divided among its tributaries that it is here hardly more than a mountain brook. Near by is Jennison's, or Carr's cabin, a favorite stopping place before crossing the range into Bakers Park. The elevation here is 9,600 feet. Hinsdale County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1873/jwh00399 ID. Jackson, W.H. 399 Amphitheater on western face of Sawatch Range, as seen from Red Mountain Pass. It lies at the head of a canyon emptying into Taylor River, a tributary of the Gunnison, about the mouth of which is an extensive series of lateral and terminal moraines. Elevation of pass is 11,841 feet. Gunnison County, Colorado. 1873. #1:/Yellowstone National Park/jwh00400 ID. Jackson, W.H. 400 Yellowstone National Park, Wyoming. Excelsior Geyser in Midway Geyser Basin. 1878(?).U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1873/jwh00401 ID. Jackson, W.H. 401 Red Rock Falls, upon a small tributary of East River, among the Elk Mountains. The sandstones over which they flow are Carboniferous, broken up into picturesque, castellated forms, and of a dark, almost maroonred. Gunnison County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh00402 ID. Jackson, W.H. 402 Teocalli Peak, from the Aztec teocalli, or sacrificial mound, that were always built in a pyramidal form, and which this mountain closely resembles. Is situated upon a small tributary of Red Rock Creek, flowing into East River. Its height is 13,274 feet. Gunnison County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh00403 ID. Jackson, W.H. 403 Gothic Mountain, East River, a bold, picturesque mountain form as well as a most instructive geologic picture. The base of the mountain is Cretaceous; then comes a broad, deep band of eruptive rock, covered with the Cretaceous which is again surmounted with a volcanic material forming it's summit. Elevation 12,498 feet. Gunnison County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh00404 ID. Jackson, W.H. 404 White Rock Mountain, a portion of the granitic core of the Elk Mountain, lying some 6 or 8 miles east of Gothic Mountain. Gunnison County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh00405 ID. Jackson, W.H. 405 East River Pass, looking across the head of East River and the pass that reached the head of Rock Creek. Gunnison County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh00406 ID. Jackson, W.H. 406 View down East River, from the pass, showing Gothic Mountain and Crested Butte in the distance. Gunnison County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh00407 ID. Jackson, W.H. 407 A spur of the Elk Mountains, lying near the head of East River, showing granite eruption, with sedimentary beds lying up on either flank. Gunnison County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh00408 ID. Jackson, W.H. 408 Looking south across Rock Creek, toward Snowmass and Capitol Mountains, Elk Mountains. Gunnison County,Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh00409 ID. Jackson, W.H. 409 Treasure Mountain in Elk Mountains, and view down the canyon of Rock Creek. Gunnison County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh00410 ID. Jackson, W.H. 410 View south across East River Pass, Elk Mountains. Gunnison County, Colorado. 1873. #1:/Yellowstone National Park/jwh00411 ID. Jackson, W.H. 411 Yellowstone National Park, Wyoming. Old Faithful Geyser in Upper Geyser Basin. 1878(?).U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1873/jwh00414 ID. Jackson, W.H. 414 Treasury Mountain, Elk Mountains. Gunnison County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh00416 ID. Jackson, W.H. 416 Cascades on Rock Creek, tumbling down the rocks a height of 500 feet, from Elk Lake, which lies in a large amphitheater above. Gunnison County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh00417 ID. Jackson, W.H. 417 A picturesque fall upon the right-hand branch of Rock Creek, flowing over almost coal black shales and running diagonally through them, under the falls, is a very distinctly marked trachytic dike. Gunnison County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh00418 ID. Jackson, W.H. 418 Cascades on Rock Creek, a few rods above Jackson, W.H. 417. Gunnison County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh00419 ID. Jackson, W.H. 419 Oro City, California Gulch, on the western slope of the Park Range. It is a mining town, pure and simple. Lake County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh00420 ID. Jackson, W.H. 420 Massive Mountain, Sawatch Range, from near mouth of California Gulch. Lake County, Colorado. 1873. (Panorama with Jackson, W.H. 421) #1:/Jackson W.H. Collection-jack1873/jwh00422 ID. Jackson, W.H. 422 A bluff of Paleozoic sandstones 1,500 feet in height on Eagle River, opposite the mouth of Roche Moutonnee Creek. Eagle County, Colorado. 1873. #1:/Jackson Collection/jwh00423 ID. Jackson, W.H. 423 Roches Moutonnees, near foot of the Mount of the Holy Cross, looking up the valley. Eagle County,Colorado. 1873. #1:/Yellowstone National Park/jwh00424 ID. Jackson, W.H. 424 Yellowstone National Park, Wyoming. Black Sand Pool in Upper Geyser Basin. 1878(?).U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1873/jwh00425 ID. Jackson, W.H. 425 Roches Moutonnees, near foot of the Mount of the Holy Cross, looking down the valley. Eagle County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh00427 ID. Jackson, W.H. 427 Panorama from near the Mount of the Holy Cross. Eagle County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh00428 ID. Jackson, W.H. 428 Panorama from near the Mount of the Holy Cross. Eagle County, Colorado. 1873. #1:/Jackson Collection/jwh00429 ID. Jackson, W.H. 429 Panorama from near the Mount of the Holy Cross. Eagle County, Colorado. 1873. #1:/Yellowstone National Park/jwh00430 ID. Jackson, W.H. 430 Yellowstone National Park, Wyoming. Lone Star Geyser in Lone Star Geyser Basin. 1878(?).U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1873/jwh00431 ID. Jackson, W.H. 431 Panorama from near the Mount of the Holy Cross. Eagle County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1874/jwh00432 ID. Jackson, W.H. 432 Herman's cabin on Grand Lake, the residence of a hermit fisherman, situated near the outlet of the lake. Grand County, Colorado. 1874. #1:/Rocky Mountain National Park/jwh00433 ID. Jackson, W.H. 433 Rocky Mountain National Park, Colorado. Valley of roche moutonnees toward Grand Lake. View is west from the foot of Round Top Mountain. This valley was once the seat of immense glaciers which eroded and polished all the ridges down its length. Ridges glisten in the sunlight. 1874.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00434 ID. Jackson, W.H. 434 Yellowstone National Park, Wyoming. Little Firehole Falls. 1874(?).U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Rocky Mountain National Park/jwh00435 ID. Jackson, W.H. 435 Rocky Mountain National Park, Colorado. Valley of roche moutonnees toward Grand Lake. View is west from the foot of Round Top Mountain. This valley was once the seat of immense glaciers which eroded and polished all the ridges down its length. Ridges glisten in the sunlight. 1874.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Rocky Mountain National Park/jwh00436 ID. Jackson, W.H. 436 Rocky Mountain National Park, Colorado. Cascades at the foot of Round Top Mountain. Here the Colorado River is a brook, falling down the mountain in a continuous series of cascades and falls. This one is about 50 feet high. 1874.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Rocky Mountain National Park/jwh00437 ID. Jackson, W.H. 437 Rocky Mountain National Park, Colorado. Cascades at the foot of Round Top Mountain. Here the Colorado River is a brook, falling down the mountain in a continuous series of cascades and falls. This one is about 50 feet high. 1874.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1874/jwh00438 ID. Jackson, W.H. 438 Hot Springs, Middle Park, at the foot of Mount Bross, on the north bank of the Colorado River. The temperature of the springs ranges from 109 to 116 degrees; the water contains sulphur, iron, magnesia, and other mineral properties, said to possess remarkable curative powers. Elevation of springs is 7,725 feet. Grand County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00439 ID. Jackson, W.H. 439 Looking up Colorado River from the Hot Springs, Middle Park, over the site of the prospective county seat of Grand County, to be known as Grand City. Grand County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00440 ID. Jackson, W.H. 440 View down the Colorado River from near the Hot Springs. The river here cuts through a mountain of solid granite to a depth of 1,500 feet, and for a distance of about 3 miles. Grand County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00441 ID. Jackson, W.H. 441 View down the Colorado River from near the Hot Springs. The river here cuts through a mountain of solid granite to a depth of 1,500 feet, and for a distance of about 3 miles. Grand County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00442 ID. Jackson, W.H. 442 View down the Colorado River from Mount Bross, Middle Park. Grand County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00443 ID. Jackson, W.H. 443 View in Middle Park, east from the mouth of the Blue River, looking up the broad, fertile valleys and graceful curves of the Colorado River. Grand County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00444 ID. Jackson, W.H. 444 Looking north across the Colorado River, from the mouth of the Blue River, Middle Park, showing in the middle distance of peculiar mesa of carboniferous limestone. Grand County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00445 ID. Jackson, W.H. 445 View down the Colorado River from the mouth of the Blue River, showing Gore Canyon in the distance, Middle Park. Grand County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00446 ID. Jackson, W.H. 446 Gore Canyon near it's mouth looking downstream. The Colorado River here makes it's first entry of the canyon, flowing quietly and smoothly through the upturned beds of sandstone that lie up against the more massive rocks of the canyon proper. Grand County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00447 ID. Jackson, W.H. 447 Gore Canyon. Colorado River, through the northern end of the Blue River Mountains; the walls of solid granite, rise 2,000 and 3,000 feet nearly vertically above the river, which rushes through in a series of foaming, dashing rapids. Grand County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00448 ID. Jackson, W.H. 448 View of the Blue River, from near Ute Peak, and from an elevation of over 1,000 feet above the river. On the right, in the distance, are the spurs of the Blue River Mountains, nearly obscured by storm clouds. Summit County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00449 ID. Jackson, W.H. 449 View of the Blue River, from near Ute Peak, and from an elevation of over 1,000 feet above the river. On the right, in the distance, are the spurs of the Blue River Mountains, nearly obscured by storm clouds. Summit County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00450 ID. Jackson, W.H. 450 Blue River Mountains, view west across the Blue River, from the side of Ute Peak. Summit County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00451 ID. Jackson, W.H. 451 Lone Rock, at the entrance to Pleasant Park. A region covered with fantastically shaped red sandstones, about 40 miles south of Denver, and lying just outside the Front Range. Douglas County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00452 ID. Jackson, W.H. 452 Pleasant Park. A group of rocks bearing resemblance to a ruined fortified city. Douglas County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00453 ID. Jackson, W.H. 453 Pleasant Park. A group of rocks bearing resemblance to a ruined fortified city. Douglas County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00454 ID. Jackson, W.H. 454 Pleasant Park, looking west over a group of the sandstones to the granitic Front Range. Douglas County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00455 ID. Jackson, W.H. 455 Pleasant Park, general view, looking south toward Lone Rock, west of Larkspur. Douglas County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00456 ID. Jackson, W.H. 456 Profile rocks in Pleasant Park. Douglas County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00457 ID. Jackson, W.H. 457 Tablelands near the Colorado Divide, 50 miles south of Denver; elevated plateaus of sandstone lying horizontally and capped with basalt. They average 800 feet above the valley. Douglas County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00458 ID. Jackson, W.H. 458 Tablelands near the Colorado Divide, 50 miles south of Denver; elevated plateaus of sandstone lying horizontally and capped with basalt. They average 800 feet above the valley. Douglas County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00459 ID. Jackson, W.H. 459 Palmer Lake on the Colorado Divide, looking north. A small body, balanced, as it were on the divide, at an elevation of 7,208 feet, its drainage equally divided between the Arkansas and the Platte. El Paso County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00460 ID. Jackson, W.H. 460 Palmer Lake on the Colorado Divide, looking north. A small body, balanced, as it were on the divide, at an elevation of 7,208 feet, its drainage equally divided between the Arkansas and the Platte. El Paso County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00461 ID. Jackson, W.H. 461 View south from Colorado Divide, down Monument Creek. The view is too extended to admit of much definition in the detail. El Paso County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00462 ID. Jackson, W.H. 462 Church Buttes on Blacks Fork. Uinta County, Wyoming.n.d. #1:/Jackson W.H. Collection-jack1874/jwh00463 ID. Jackson, W.H. 463 View showing a peculiar conglomerate made up of large angular masses of granite. West bank of Monument Creek was the divide. El Paso County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00464 ID. Jackson, W.H. 464 Solitary Butte of sandstone in the valley of Monument Creek. El Paso County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00465 ID. Jackson, W.H. 465 Natural Arch under the Citadel Rock in the Colorado Divide, near Palmer Lake. El Paso County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00466 ID. Jackson, W.H. 466 Natural Arch under the Citadel Rock in the Colorado Divide, near Palmer Lake. El Paso County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00467 ID. Jackson, W.H. 467 Monument Park. Various studies among the fantastic monuments. El Paso County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00468 ID. Jackson, W.H. 468 Monument Park. Various studies among the fantastic monuments. El Paso County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00469 ID. Jackson, W.H. 469 Monument Park. Various studies among the fantastic monuments. El Paso County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00470 ID. Jackson, W.H. 470 San Luis Valley and Lake, with the Sierra Blanca in the distance. San Luis Valley is an immense arid plain, with the exception of the country bordering the few streams from the mountains and two or three stagnant lakes, of which the view is one, that are formed by them. It is 50 by 150 miles in extent, and supports vast herds of cattle and flocks of sheep along its eastern edge. The highest peak of the Sierra Blanca, as seen in the distance, is 14,400 feet. Alamosa County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00471 ID. Jackson, W.H. 471 Rio Grande River. Wagon Wheel Gap, showing the nearly columnar stratification of the basaltic bluffs bordering the stream, which, despite the rugged character of its surroundings, flows calmly and quietly under the overhanging bluffs. Mineral County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00472 ID. Jackson, W.H. 472 Antelope Park in the valley of the Rio Grande, a general view, looking down from upper end of park. It is merely an expansion of the valley of the river. It is noted as a fine fishing resort and for the excellence of its pasturage, although its elevation of 9,000 feet, is too great to admit of outdoor wintering. Mineral County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00473 ID. Jackson, W.H. 473 Bristol Head, Antelope Park. A prominent headland of basaltic material jutting out on the lower end of the park. It is so called by some English residents of the park, as suggesting a resemblance to their native landmark. Mineral County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00474 ID. Jackson, W.H. 474 Bristol Head, Antelope Park. A prominent headland of basaltic material jutting out on the lower end of the park. It is so called by some English residents of the park, as suggesting a resemblance to their native landmark. Mineral County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00475 ID. Jackson, W.H. 475 Trachytic bluffs on the Rio Grande, at the mouth of Lost Trail Creek. The trachyte is exposed over a considerable portion of the mountains, and is particularly noticeable in being banded into bright tints of green, blue, violet, and yellow. Hinsdale County, Colorado. 1874. #1:/Rocky Mountain National Park/jwh00476 ID. Jackson, W.H. 476 Rocky Mountain National Park, Colorado. Longs Peak, viewed from the lower end of Estes Park. 1873.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1874/jwh00477 ID. Jackson, W.H. 477 Canyon of the Rio Grande at River Bend, a short distance below Carr's cabin. Hinsdale County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00478 ID. Jackson, W.H. 478 View on the White Earth River, looking down, where the trail from Los Pinos to Antelope Park crosses the White Earth; is a handsome little pocket of a valley, surrounded by high walls of the variously colored trachytes, characteristic of this region. The river canyons cut deeply, both in entering and leaving thisvalley. Gunnison and Hinsdale Counties, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00479 ID. Jackson, W.H. 479 Beaver's work. Shows how they cut down trees, trim them out, and cut them into convenient lengths suitable for their purpose. The trees at the left is 18 inches in diameter. The amount of work they do, and the mechanical ingenuity they show in its accomplishment, would hardly obtain credence were it not for the incontrovertible evidence here before our eyes. Colorado. 1870. #1:/Jackson W.H. Collection-jack1874/jwh00480 ID. Jackson, W.H. 480 View on the White Earth River, looking down, where the trail from Los Pinos to Antelope Park crosses the White Earth; is a handsome little pocket of a valley, surrounded by high walls of the variously colored trachytes, characteristic of this region. The river canyons cut deeply, both in entering and leaving this valley. Gunnison and Hinsdale Counties, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00481 ID. Jackson, W.H. 481 View on the White Earth River, looking down, where the trail from Los Pinos to Antelope Park crosses the White Earth; is a handsome little pocket of a valley, surrounded by high walls of the variously colored trachytes, characteristic of this region. The river canyons cut deeply, both in entering and leaving this valley. Gunnison and Hinsdale Counties, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00482 ID. Jackson, W.H. 482 Arastra Gulch, looking up from across the Animas, which is here sunk far out of sight, in the gorge running across the foreground of the ravine. The wrecks of the old arrastras, that were put in some 12 or 14 years ago, in Baker's time, have given the gulch its name. It was also worked in that time for goldin placers, but with no success. It is now more favorably known through its silver mines, which are among the richest of this region. San Juan County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00483 ID. Jackson, W.H. 483 Tower Mountain, opposite Howardsville, Bakers Park. Upon its nearby perpendicular fact of 3,000 feet are exposed a number of quartz veins, traversing its whole length. The one cutting down diagonally from the left is the Mammoth lode. Most of the others are claimed as mineral-bearing veins. San Juan County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00484 ID. Jackson, W.H. 484 Bakers Park, as seen from the summit of Sultan Mountain, nearly 4,000 feet above it. In the distance are the Uncompahgre Mountains. The Animas rises near them, and, coming south, receives Cunningham Creek from the right, as seen in the view, and then, nearer the foreground, from the left, Cement and Mineral Creeks, the main stream turning sharply to the right, where it enters the famous canyon of the Animas. San Juan County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00485 ID. Jackson, W.H. 485 A panoramic view from Sultan Mountain. View sweeps the entire horizon from the center of the San Juan Mountains, the most rugged mass of mountain peaks of the whole Rocky Mountain Range. View west from Sultan Mountain. San Juan County, Colorado. 1874. Panorama with photo nos. 486 - 488. #1:/Jackson W.H. Collection-jack1874/jwh00486 ID. Jackson, W.H. 486 A panoramic view from Sultan Mountain. View sweeps the entire horizon from the center of the San Juan Mountains, the most rugged mass of mountain peaks of the whole Rocky Mountain Range. Southwest from Sultan Mountain. San Juan County, Colorado. 1874. Panorama with photo nos. 485, 487 - 488. #1:/Jackson W.H. Collection-jack1874/jwh00487 ID. Jackson, W.H. 487 A panoramic view from Sultan Mountain. View sweeps the entire horizon from the center of the San Juan Mountains, the most rugged mass of mountain peaks of the whole Rocky Mountain Range. South from Sultan Mountain. San Juan County, Colorado. 1874. Panorama with photo nos. 485 - 486, 488. #1:/Jackson W.H. Collection-jack1874/jwh00488 ID. Jackson, W.H. 488 A panoramic view from Sultan Mountain. View sweeps the entire horizon from the center of the San Juan Mountains, the most rugged mass of mountain peaks of the whole Rocky Mountain Range. East from Sultan Mountain. San Juan County, Colorado. 1874. Panorama with photo nos. 485 - 487. #1:/Jackson W.H. Collection-jack1874/jwh00489 ID. Jackson, W.H. 489 Camp study. James Stevenson.n.d. #1:/Jackson W.H. Collection-jack1873/jwh00490 ID. Jackson, W.H. 490 Camp study. Hayden, Stevenson, Holman, Jones, Gardner, Whitney, and Holmes. The party that made the first ascent of the Holy Cross Mountain. These men were together only on 1873 expedition. 1873. #1:/Jackson W.H. Collection-jack1873/jwh00491 ID. Jackson, W.H. 491 Camp study.J.M. Coulter, Lt. Carpenter, packer, and the cook of the party. W.H. Jackson at right. These men were together only on 1873 expedition. 1873. #1:/Jackson W.H. Collection-jack1874/jwh00492 ID. Jackson, W.H. 492 West from Sultan Mountain. San Juan County, Colorado. 1874. Panorama with Jackson, W.H. 493. 1874? #1:/Jackson W.H. Collection-jack1874/jwh00493 ID. Jackson, W.H. 493 Southwest from Sultan Mountain. San Juan County, Colorado. 1874. Panorama with Jackson, W.H. 492. 1874? #1:/Jackson W.H. Collection-jack1874/jwh00494 ID. Jackson, W.H. 494 The Sierra San Juan, east from Sultan Mountain. San Juan County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00495 ID. Jackson, W.H. 495 Sierra San Juan. View above timber line, at the source of one of the main tributaries of Mineral Creek, showing the snow-fed lakelets, so numerous among the higher snow-clad peaks and sharply serrated crests. San Juan County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00496 ID. Jackson, W.H. 496 Sierra San Juan. View above timber line, at the source of one of the main tributaries of Mineral Creek, showing the snow-fed lakelets, so numerous among the higher snow-clad peaks and sharply serrated crests. The broad mountain on the right is 13,897 feet high. San Juan County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00497 ID. Jackson, W.H. 497 San Miguel Lake, now called Trout Lake. The Rio San Miguel Lake, now called Trout Lake. The Rio San Miguel is one of the lower tributaries of the Gunnison River, rising in the heat of the San Juan Mountains, from which as a center radiate all the principal streams of the southwest. The lake is small, not more than a mile in length, and well filled with trout. It occupies a little valley at the foot of the mountains, at an elevation of 9,720 feet above the sea. Bear Creek Pass, the depression in the center of the view, is 12,600 feet high. The sharp peak on the left is station 30, 13,897 feet altitude. San Miguel County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1872/jwh00499 ID. Jackson, W.H. 499 Camp study. Logan, Carrington, Negley. These men were together only on 1871 and 1872 expeditions. 1872. #1:/Jackson W.H. Collection-jack1871/jwh00500 ID. Jackson, W.H. 500 Camp study. Jackson, Dr. Peale, Dr. Turnbull, and Dixon. These men were together only on 1871 expedition. 1871. #1:/Jackson W.H. Collection-jack1874/jwh00501 ID. Jackson, W.H. 501 Morning ablutions. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00502 ID. Jackson, W.H. 502 Geologists at work. 1874. #1:/Jackson W.H. Collection-jack18ny/jwh00503 ID. Jackson, W.H. 503 Camp study. Hayden and Walter Paris.n.d. #1:/Jackson W.H. Collection-jack1875/jwh00504 ID. Jackson, W.H. 504 A mountain trail in Cunningham Gulch, leading from the camp to the mines of the Mountaineer, North Star, etc., around on one of the spurs of King Solomon Mountain, San Juan Mountains. San Juan County, Colorado. 1875. #1:/Jackson W.H. Collection-jack1875/jwh00505 ID. Jackson, W.H. 505 Cunningham Gulch, from the camp of the miners of the Mountaineer and North Star lodes, on the south side of the gulch, 1,000 feet above the valley. At the left is King Solomon Mountain, and on the right Green and Galena Mountains, with Rocky Gulch between, up which is the route of the Bakers Park and Del Norte wagon road. San Juan County, Colorado. 1875. #1:/Jackson W.H. Collection-jack1874/jwh00506 ID. Jackson, W.H. 506 A camp of the Survey on West Monument Creek. El Paso County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00507 ID. Jackson, W.H. 507 Group of riding and pack animals. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00508 ID. Jackson, W.H. 508 Pack animals with "Aparejos." 1874. #1:/Jackson W.H. Collection-jack1875/jwh00509 ID. Jackson, W.H. 509 Uncompahgre Peak from south. Hinsdale County, Colorado. 1875. #1:/Jackson W.H. Collection-jack1871/jwh00510 ID. Jackson, W.H. 510 Snake River up from Taylors Bridge. Idaho. 1871? #1:/Jackson W.H. Collection-jack1875/jwh00511 ID. Jackson, W.H. 511 Uncompahgre Peak from the east. Hinsdale County, Colorado. 1875. #1:/Jackson W.H. Collection-jack1874/jwh00512 ID. Jackson, W.H. 512 The 1874 photographic division, on the way to Los Pinos and the Mesa Verde. Left to right: Smart, Anthony, Mitchell, Whan, Ernest Ingersoll, and Charley, the cook. Dolly, the mule, stands between Charley and Ingersoll. 1874. #1:/Jackson W.H. Collection-jack1875/jwh00513 ID. Jackson, W.H. 513 Argenta Falls, Lake Fork, one-half of a mile below San Cristobal Lake, and about 90 feet in height, Gunnison River. Some enterprising miners, who are at work almost beneath the fall, have constructed a neat bridge across it. Hinsdale County, Colorado. 1875. #1:/Jackson W.H. Collection-jack1874/jwh00514 ID. Jackson, W.H. 514 Three very good friends. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00515 ID. Jackson, W.H. 515 Southern division, Geological Survey.A.D. Wilson in charge. Figures: Endlich, Rhoda, Wilson. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00516 ID. Jackson, W.H. 516 The Rio Grande, a view about 1 mile below Wagon Wheel Gap, a wild picturesque gorge, where the river has forced its way through a volcanic ridge, 2,000 to 3,000 feet in height. Mineral County, Colorado. 1874. #1:/Hovenweep National Monument/jwh00517 ID. Jackson, W.H. 517 Hovenweep National Monument, Colorado. Hovenweep Castle. Ruined town on the Hovenweep, a tributary of the San Juan lying just within Colorado, occupying a prominent rocky bluff overlooking the usually dry bed of the creek. It consisted of a solid mass of small houses not more than 6 by 8 feet in diameter, arranged in a semicircle. The convex side was flush with the edge of the rocky bluff and inaccessible. The concave side, which was depressed like a amphitheater, was occupied by much lower and less important buildings, now almost unrecognizable. The most prominent of the buildings are solidly constructed of well-dressed stone, and not withstanding their exposed situations, are well preserved. 1874.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00518 ID. Jackson, W.H. 518 Yellowstone National Park, Wyoming. Mammoth Hot Springs, looking up. 1878. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Hovenweep National Monument/jwh00519 ID. Jackson, W.H. 519 Hovenweep National Monument, Colorado. Hovenweep Castle. Ruined town on the Hovenweep, a tributary of the San Juan lying just within Colorado, occupying a prominent rocky bluff overlooking the usually dry bed of the creek. It consisted of a solid mass of small houses not more than 6 by 8 feet in diameter, arranged in a semicircle. The convex side was flush with the edge of the rocky bluff and inaccessible. The concave side, which was depressed like a amphitheater, was occupied by much lower and less important buildings, now almost unrecognizable. The most prominent of the buildings are solidly constructed of well-dressed stone, and not withstanding their exposed situations, are well preserved. 1874.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Hovenweep National Monument/jwh00520 ID. Jackson, W.H. 520 Hovenweep National Monument, Colorado. Hovenweep Castle. Ruined town on the Hovenweep, a tributary of the San Juan lying just within Colorado, occupying a prominent rocky bluff overlooking the usually dry bed of the creek. It consisted of a solid mass of small houses not more than 6 by 8 feet in diameter, arranged in a semicircle. The convex side was flush with the edge of the rocky bluff and inaccessible. The concave side, which was depressed like a amphitheater, was occupied by much lower and less important buildings, now almost unrecognizable. The most prominent of the buildings are solidly constructed of well-dressed stone, and not withstanding their exposed situations, are well preserved. 1874.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1874/jwh00521 ID. Jackson, W.H. 521 Monument Park. Various studies among the fantastic monuments.W.H. Holmes in view. El Paso County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00522 ID. Jackson, W.H. 522 Gore's Canyon. Colorado River through the northern end of the Blue River Mountains; the walls of solid granite, rise 2,000 and 3,000 feet nearly vertical above the river, which rushes through in a series of foaming, dashing rapids. Grand County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00523 ID. Jackson, W.H. 523 View up the Blue River, from its intersection with the Colorado in Middle Park. In the distance are the Blue River Mountains, the highest Point of which, on the right, is Mount Powell, 13,398 feet high. Grand County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00524 ID. Jackson, W.H. 524 The Rio Grande between Lost Trail and Pole Creeks, near Carr's Cabin, looking up to the summit of the range. Five miles above is Pole Creek, where the road turns well to the right to cross the divide. Hinsdale County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00525 ID. Jackson, W.H. 525 East from near the summit of Mount Bross, back of the Hot Springs in Middle Park, looking up Colorado River to mountains in the dim distance is Longs Peak. Grand County, Colorado. 1874 #1:/Jackson W.H. Collection-jack1874/jwh00526 ID. Jackson, W.H. 526 Berthoud Pass, looking north. Height of pass, 11,313 feet. View made from point 80 feet above lowest point of pass. James Peak, with an elevation of 13,283 feet, is near the center, while away in the distance on the left is the group around Arapaho Peak. Figure is Harry Yount. Colorado. 1874. #1:/Jackson W.H. Collection-jack1873/jwh00527 ID. Jackson, W.H. 527 Mount of the Hole Cross. Eagle County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1874/jwh00528 ID. Jackson, W.H. 528 The Sierra La Plata. A view looking up into the heart of the principal group of peaks, prominent among which is Mount Babcock, so named from a California gentleman prominently connected with the mining interests of this region. Elevation of highest point 14,000 feet. La Plata County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh00529 ID. Jackson, W.H. 529 View south from the Sierra La Plata. The La Plata Mountains are a group by themselves, some distance to the south of the San Juan Peaks, and are coming into general notice from the great mineral wealth contained within them. Out view is from a point on the west bank of the Rio La Plata, and some 3,000 feet above it. The stream can be seen in the dim distance, meandering away to the plain of the San Juan River. The horizon extends over into New Mexico. La Plata County, Colorado. 1874. #1:/Yellowstone National Park/jwh00531 ID. Jackson, W.H. 531 Yellowstone National Park, Wyoming. Great Hot Spring near the Grand Canyon of the Yellowstone. 1878(?).U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1875/jwh00532 ID. Jackson, W.H. 532 Cliff ruins, canyon near Sierra Abajo. San Juan County, Utah. 1875. #1:/Yellowstone National Park/jwh00533 ID. Jackson, W.H. 533 Yellowstone National Park, Wyoming. Craters of Grand Geyser and Turban Geyser in Upper Geyser Basin.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1875/jwh00534 ID. Jackson, W.H. 534 Ruins in Montezuma Canyon. Between the river Mancos and the Colorado Canyon is a wide waster of arid, desolate country, without any living streams, excepting a few that rise in the Sierra Abajo, and are soon swallowed up by the dry plains at its feet. The drainage resulting from winter rains is carried off through the numberless canyons, which intersect the plateaus in every direction, and are perfectly dry excepting during the rainy season. The Montezuma is the principal one of these "washes" debouching into the San Juan, and which, with its ramifications, occupies all the country between El Late and the Sierra Abajo. Throughout its main branch are scattered innumerable ruins of towns, both in valley and upon the bluffs, curious little cliff houses, towns, and temples. View represents a large mass of ruins, a peculiar feature of which is a series of large stones set upon end and projecting 5 to 7 feet above the surface. San Juan County, Utah. 1875. #1:/Yellowstone National Park/jwh00535 ID. Jackson, W.H. 535 Yellowstone National Park, Wyoming. Crater of Giant Geyser in Upper Geyser Basin. 1878.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1875/jwh00536 ID. Jackson, W.H. 536 Punch and Judy, now called Navajo Twins. Two solitary knobs left standing upon the edge of the tablelands bordering the San Juan River. This river affords an excellent study of the sandstones of this region. San Juan County, Utah. 1875. #1:/Yellowstone National Park/jwh00537 ID. Jackson, W.H. 537 Yellowstone National Park, Wyoming. Crater of Fan Geyser. 1878.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1875/jwh00538 ID. Jackson, W.H. 538 Canyon of the San Juan. A few miles below the mouth of the Rio de Chelly immense great walls of dark brown sandstone hem the river closely in, and which grow in height and crowd still closer upon the river until they colminate in the great canyon of the Colorado. San Juan County, Utah. 1875. #1:/Jackson W.H. Collection-jack1875/jwh00539 ID. Jackson, W.H. 539 Canyon of the San Juan. A few miles below the mouth of the Rio de Chelly immense great walls of dark brown sandstone hem the river closely in, and which grow in height and crowd still closer upon the river until they colminate in the great canyon of the Colorado. San Juan County, Utah. 1875. #1:/Yellowstone National Park/jwh00540 ID. Jackson, W.H. 540 Yellowstone National Park, Wyoming. Near the Grotto Geyser in Upper Geyser Basin. 1875.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1875-jack1875/jwh00541 ID. Jackson, W.H. 541 Battle Rock on McElmo Canyon. San Juan County, Utah. 1875. #1:/Jackson W.H. Collection-jack1875/jwh00542 ID. Jackson, W.H. 542 Boren's cabin, the home of the hermit-like miner, who, though living alone, differs from the hermit inbeing very glad to see visitors. La Plata Mountains. La Plata County, Colorado. 1875. #1:/Yellowstone National Park/jwh00543 ID. Jackson, W.H. 543 Yellowstone National Park, Wyoming. Great Hot Springs on the Madison River. 1875.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1875/jwh00544 ID. Jackson, W.H. 544 Head of Borens Gulch, southern face of the La Plata Mountains. La Plata County, Colorado. 1875. #1:/Jackson W.H. Collection-jack1875/jwh00547 ID. Jackson, W.H. 547 Borens Falls, in the La Plata Mountains and near the source of La Plata River; is about 75 feet in height. La Plata County, Colorado. 1875. #1:/Yellowstone National Park/jwh00548 ID. Jackson, W.H. 548 (Panorama) Yellowstone National Park, Wyoming. Midway Geyser Basin. 1875.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00549 ID. Jackson, W.H. 549 (Panorama) Yellowstone National Park, Wyoming. Midway Geyser Basin. 1875.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1875/jwh00550 ID. Jackson, W.H. 550 Lake San Miguel, now called Trout Lake, and western San Juan Mountains. San Miguel County, Colorado. 1875. #1:/Jackson W.H. Collection-jack1875/jwh00551 ID. Jackson, W.H. 551 Head of Arastra Gulch, Bakers Park. San Juan County, Colorado. 1875. #1:/Jackson W.H. Collection-jack1875/jwh00552 ID. Jackson, W.H. 552 Bakers Park, looking south from a point 2 miles above Howardsville. On the left are the snow-tipped summits of Galena, King Solomon, and Kendall Mountains. San Juan County, Colorado. 1875. #1:/Jackson W.H. Collection-jack1875/jwh00553 ID. Jackson, W.H. 553 The Animas River, Bakers Park, near the mouth of Arastra Gulch, looking down toward Sultan Mountain. San Juan County, Colorado. 1875. #1:/Jackson W.H. Collection-jack1875/jwh00554 ID. Jackson, W.H. 554 A view of the quartzite peaks south of Bakers Park, from King Solomon Mountain. San Juan County, Colorado. 1875. #1:/Jackson W.H. Collection-jack1875/jwh00555 ID. Jackson, W.H. 555 (Panorama) A panoramic view of the San Juan Mountains from the summit of King Solomon Mountain, 13,600 feet in height. Prominent on the horizon are the quartzite peaks east of the canyon of the Animas, Kendall Mountain, and the head of Arastra Gulch, and the immense number of peaks lying about the head of the Cement and San Miguel. San Juan County, Colorado. 1875. #1:/Jackson W.H. Collection-jack1875/jwh00556 ID. Jackson, W.H. 556 (Panorama) A panoramic view of the San Juan Mountains from the summit of King Solomon Mountain, 13,600 feet in height. Prominent on the horizon are the quartzite peaks east of the canyon of the Animas, Kendall Mountain, and the head of Arastra Gulch, and the immense number of peaks lying about the head of the Cement and San Miguel. San Juan County, Colorado. 1875. #1:/Jackson W.H. Collection-jack1875/jwh00557 ID. Jackson, W.H. 557 A panoramic view of the San Juan Mountains from the summit of King Solomon Mountain, 13,600 feet in height. Prominent on the horizon are the quartzite peaks east of the canyon of the Animas, Kendall Mountain, and the head of Arastra Gulch, and the immense number of peaks lying about the head of the Cement and San Miguel. San Juan County, Colorado. 1875. #1:/Yellowstone National Park/jwh00558 ID. Jackson, W.H. 558 Yellowstone National Park, Wyoming. Conch Spring in Lower Geyser Basin. 1878. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00559 ID. Jackson, W.H. 559 Yellowstone National Park, Wyoming. Liberty Cap in the Mammoth Hot Springs area.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00560 ID. Jackson, W.H. 560 Yellowstone National Park, Wyoming. Boiling Spring in Lower Geyser Basin. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1875/jwh00561 ID. Jackson, W.H. 561 A panoramic view of the San Juan Mountains from the summit of King Solomon Mountain, 13,600 feet in height. Prominent on the horizon are the quartzite peaks east of the canyon of the Animas, Kendall Mountain, and the head of Arastra Gulch, and the immense number of peaks lying about the head of the Cement and San Miguel. San Juan County, Colorado. 1875. #1:/Yellowstone National Park/jwh00562 ID. Jackson, W.H. 562 Yellowstone National Park, Wyoming. Crater of Fountain Geyser in Lower Geyser Basin. 1878.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1875-Highland Mary Mine/jwh00563 ID. Jackson, W.H. 563 Cascades at the head of Cunningham Gulch, opposite the Highland Mary mine. San Juan County, Colorado. 1875. #1:/Yellowstone National Park/jwh00564 ID. Jackson, W.H. 564 Yellowstone National Park, Wyoming. Crater of Fountain Geyser in Lower Geyser Basin. 1878(?).U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1875/jwh00565 ID. Jackson, W.H. 565 Cunningham Gulch, from the camp of the miners of the Mountaineer and North Star lodes, on the south side of the gulch, 1,000 feet above the valley. At the left is King Solomon Mountain, and on the right Greenand Galena Mountains, with Rocky Gulch between, up which is the route of the Bakers Park and Del Norte wagon road. San Juan County, Colorado. 1875. #1:/Jackson W.H. Collection-jack1875/jwh00566 ID. Jackson, W.H. 566 Camp of the miners of the North Star and Mountaineer lodes, on King Solomon Mountain, above Cunningham Gulch. San Juan County, Colorado. 1875. #1:/Yellowstone National Park/jwh00567 ID. Jackson, W.H. 567 Yellowstone National Park, Wyoming. Fountain Geyser in Lower Geyser Basin. 1878.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00568 ID. Jackson, W.H. 568 Yellowstone National Park, Wyoming. White Cone Geyser in Lower Geyser Basin. 1878.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1875/jwh00570 ID. Jackson, W.H. 570 Lake San Cristobal on Lake Fork. A beautiful sheet of water, formed by the damming up of the Lake Fork of the Gunnison by a landslide. It is nearly 2 miles in length, and less than half a mile broad at its widest place. Elevation 9,000 feet. Hinsdale County, Colorado. 1875. #1:/Jackson W.H. Collection-jack1875/jwh00571 ID. Jackson, W.H. 571 Lower Falls on Lake Fork. Two miles below Argenta Falls the river makes another leap about 50 feet, over the massive gray trachytes characteristic of this region. Hinsdale County, Colorado. 1875. #1:/Yellowstone National Park/jwh00572 ID. Jackson, W.H. 572 Yellowstone National Park, Wyoming. Ruins of an extinct spring at Mammoth Hot Springs. 1878.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00573 ID. Jackson, W.H. 573 Yellowstone National Park, Wyoming. Glen Spring in the Mammoth Hot Springs area. 1878.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1878/jwh00574 ID. Jackson, W.H. 574 Sand dunes, near Mosca Pass. Saguache County, Colorado.n.d. 1878? #1:/Yellowstone National Park/jwh00575 ID. Jackson, W.H. 575 Yellowstone National Park, Wyoming. Castle Geyser in Upper Geyser Basin. 1878.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00576 ID. Jackson, W.H. 576 Yellowstone National Park, Wyoming. Liberty Cap in the Mammoth Hot Springs area.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00577 ID. Jackson, W.H. 577 Yellowstone National Park, Wyoming. No information provided. #1:/Yellowstone National Park/jwh00578 ID. Jackson, W.H. 578 Yellowstone National Park, Wyoming. Summit of a terrace in the Mammoth Hot Springs area. 1878.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00579 ID. Jackson, W.H. 579 Yellowstone National Park, Wyoming. Summit of the first terrace at Mammoth Hot Springs. Travertine fan. 1878.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00580 ID. Jackson, W.H. 580 Yellowstone National Park, Wyoming. Crater of Fountain Geyser in Lower Geyser Basin. 1878.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00581 ID. Jackson, W.H. 581 Yellowstone National Park, Wyoming. Frozen Waterfall in the Mammoth Hot Springs area.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00582 ID. Jackson, W.H. 582 Yellowstone National Park, Wyoming. Near the summit of the first terrace at Mammoth Hot Springs.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00583 ID. Jackson, W.H. 583 Yellowstone National Park, Wyoming. Lower basins in the Mammoth Hot Springs area.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack18ny/jwh00584 ID. Jackson, W.H. 584 Camp study. Lieutenant Jerome.n.d. #1:/Yellowstone National Park/jwh00585 ID. Jackson, W.H. 585 Yellowstone National Park, Wyoming. Camp study.E. Campbell Carrington, zoologist. 1874.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00586 ID. Jackson, W.H. 586 Yellowstone National Park, Wyoming. Lower group of stalactitic basins in the Mammoth Hot Springs area. Circa 1878. #1:/Yellowstone National Park/jwh00587 ID. Jackson, W.H. 587 Yellowstone National Park, Wyoming. Camp study. Negley, who was on only the 1871 and 1872 expeditions.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00588 ID. Jackson, W.H. 588 Yellowstone National Park, Wyoming. Camp study. Henry W. Elliott, artist, who was on only the 1870 and 1871 expeditions.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00589 ID. Jackson, W.H. 589 Yellowstone National Park, Wyoming. Camp study.F.J. Huse, who was on only the 1871 expedition.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00590 ID. Jackson, W.H. 590 Yellowstone National Park, Wyoming. Camp study. Smith, topographer, who was on only the 1871 expedition.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00591 ID. Jackson, W.H. 591 Yellowstone National Park, Wyoming. View from the upper terrace at Mammoth Hot Springs.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00592 ID. Jackson, W.H. 592 Yellowstone National Park, Wyoming. Camp study. William Henry Jackson, photographer.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00593 ID. Jackson, W.H. 593 Yellowstone National Park, Wyoming. Mammoth Hot Springs, looking northeast. 1878.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1878/jwh00594 ID. Jackson, W.H. 594 Camp study.W.H. Jackson.n.d. 1878? #1:/Yellowstone National Park/jwh00595 ID. Jackson, W.H. 595 Yellowstone National Park, Wyoming. Camp study. William Henry Jackson, photographer.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1878/jwh00596 ID. Jackson, W.H. 596 Ancient ruins at the head of the McElmo. El Late Mountains. Montezuma County, Colorado.n.d. 1878? #1:/Yellowstone National Park/jwh00597 ID. Jackson, W.H. 597 Yellowstone National Park, Wyoming. Mammoth Hot Springs, looking north to the Yellowstone. 1878.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00598 ID. Jackson, W.H. 598 Yellowstone National Park, Wyoming. Camp study.G.B. Dixon, photographer's assistant, who was on only the 1871 expedition.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1875/jwh00599 ID. Jackson, W.H. 599 Cave Rocks, near Sierra La Sal. Scene of Gardner's encounter with the Indians. Between the Sierra Abajo and La Sal, in the great basin-like depression falling toward the Colorado, are a number of red and white sandstone buttes, which display in a marked manner their tendency to weather into great circular caves, affording the favorite building-sites of the prehistoric man of this region. These particular rocks, however, give no indications of ever having been occupied. San Juan County, Utah. 1875. #1:/Jackson W.H. Collection-jack1874/jwh00600 ID. Jackson, W.H. 600 A general view of the canyon of the Mancos near its entrance to the valley of the San Juan. The bluffs on either side are from 1,000 to 1,200 feet in height, and in crevices near their summits are built the curious cliff houses of this series. Montezuma County, Colorado. 1874. #1:/Yellowstone National Park/jwh00601 ID. Jackson, W.H. 601 Yellowstone National Park, Wyoming. Mammoth Hot Springs, looking north to the valley of the Yellowstone River.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack18ny/jwh00602 ID. Jackson, W.H. 602 Ancient ruins in the canyon of the Mancos. Montezuma County, Colorado.n.d. #1:/Jackson W.H. Collection-jack1875/jwh00603 ID. Jackson, W.H. 603 Cliff ruins, Mancos Canyon. Montezuma County, Colorado. 1875. #1:/Jackson W.H. Collection-jack1878/jwh00604 ID. Jackson, W.H. 604 Togwotee Pass. Lincoln County, Wyoming. 1878? #1:/Jackson W.H. Collection-jack1878/jwh00605 ID. Jackson, W.H. 605 Mount Leidy, Buffalo Fork. Lincoln County, Wyoming. 1878? #1:/Jackson W.H. Collection-jack1878/jwh00606 ID. Jackson, W.H. 606 Badlands on Wind River. Fremont County, Wyoming. 1878? #1:/Jackson W.H. Collection-jack1878/jwh00607 ID. Jackson, W.H. 607 View from Togwotee Pass. Lincoln County, Wyoming. 1878. #1:/Yellowstone National Park/jwh00608 ID. Jackson, W.H. 608 Yellowstone National Park, Wyoming. Tower Falls. 1878(?).U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1878/jwh00609 ID. Jackson, W.H. 609 Wind River Peak. Fremont County, Wyoming. 1878? #1:/Jackson W.H. Collection-jack1878/jwh00610 ID. Jackson, W.H. 610 View north from Fremont Peak. Fremont County, Wyoming. 1878? #1:/Yellowstone National Park/jwh00611 ID. Jackson, W.H. 611 Yellowstone National Park, Wyoming. Heart Lake and Mount Sheridan. 1878. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1878/jwh00612 ID. Jackson, W.H. 612 Summit of Fremont Peak. Fremont county, Wyoming. 1878? #1:/Yellowstone National Park/jwh00613 ID. Jackson, W.H. 613 Yellowstone National Park, Wyoming. Glen Spring in the Mammoth Hot Springs area. 1878(?).U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00614 ID. Jackson, W.H. 614 Yellowstone National Park, Wyoming. Crater of Pearl Geyser in Norris Geyser Basin. 1878(?).U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00615 ID. Jackson, W.H. 615 Yellowstone National Park, Wyoming. Crater of Pearl Geyser in Norris Geyser Basin. 1878(?).U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00616 ID. Jackson, W.H. 616 Yellowstone National Park, Wyoming. Pearl Geyser cone in Norris Geyser Basin. 1878(?).U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1875/jwh00617 ID. Jackson, W.H. 617 A panoramic view of the San Juan Mountains from the summit of King Solomon Mountain, 13,600 feet in height. Prominent on the horizon are the quartzite peaks east of the canyon of the Animas, Kendall Mountain, and the head of Arastra Gulch, and the immense number of peaks lying about the head of the Cement and San Miguel. San Juan county, Colorado. 1875. #1:/Grand Teton National Park/jwh00618 ID. Jackson, W.H. 618 Grand Teton National Park, Wyoming. Camp under the Tetons.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1870/jwh00619 ID. Jackson, W.H. 619 Soda Springs, on the Fountain qui Bouille, 3 miles above Colorado City. El Paso County, Colorado. 1870. #1:/Yellowstone National Park/jwh00620 ID. Jackson, W.H. 620 Yellowstone National Park, Wyoming. Fissure Springs in Heart Lake Geyser Basin. 1878.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00621 ID. Jackson, W.H. 621 Yellowstone National Park, Wyoming. Fissure Springs in Heart Lake Geyser Basin. 1878.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00622 ID. Jackson, W.H. 622 Yellowstone National Park, Wyoming. Columbia Spring in Heart Lake Geyser Basin. 1878.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00623 ID. Jackson, W.H. 623 Yellowstone National Park, Wyoming. Crater of Rustic Geyser in Heart Lake Geyser Basin. 1878.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00624 ID. Jackson, W.H. 624 Yellowstone National Park, Wyoming. Crater of Rustic Geyser in Heart Lake Geyser Basin. 1878.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00625 ID. Jackson, W.H. 625 Yellowstone National Park, Wyoming. Coral Spring in Shoshone Geyser Basin. 1878(?).U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00626 ID. Jackson, W.H. 626 Yellowstone National Park, Wyoming. Coral Spring in Shoshone Geyser Basin. 1878(?).U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00627 ID. Jackson, W.H. 627 Yellowstone National Park, Wyoming. Yellow Sponge Spring in Shoshone Geyser Basin. 1878.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00628 ID. Jackson, W.H. 628 Yellowstone National Park, Wyoming. Yellow Sponge Spring in Shoshone Geyser Basin. 1878.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00629 ID. Jackson, W.H. 629 Yellowstone National Park, Wyoming. Crater of Union Geyser in Shoshone Geyser Basin. 1878(?).U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00630 ID. Jackson, W.H. 630 Yellowstone National Park, Wyoming. White Velvet Spring in Shoshone Geyser Basin. 1878.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00631 ID. Jackson, W.H. 631 Yellowstone National Park, Wyoming. Brown Sponge Spring in Shoshone Geyser Basin. 1878.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00632 ID. Jackson, W.H. 632 Yellowstone National Park, Wyoming. White Velvet Spring in Shoshone Geyser Basin. 1878.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00633 ID. Jackson, W.H. 633 Yellowstone National Park, Wyoming. Bronze Spring in Shoshone Geyser Basin. 1878.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00634 ID. Jackson, W.H. 634 Yellowstone National Park, Wyoming. Bronze Spring in Shoshone Geyser Basin. 1878.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00635 ID. Jackson, W.H. 635 Yellowstone National Park, Wyoming. Shoshone Geyser Basin. 1878(?).U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00636 ID. Jackson, W.H. 636 Yellowstone National Park, Wyoming. Rosette Spring in Shoshone Geyser Basin. 1878(?).U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00637 ID. Jackson, W.H. 637 Yellowstone National Park, Wyoming. Craters of Gourd Geyser, Shield Geyser, and Minute Man Geyser in Shoshone Geyser Basin. 1878.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00638 ID. Jackson, W.H. 638 Yellowstone National Park, Wyoming. Crater of the Minute Man in Shoshone Geyser Basin. 1878.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Grand Teton National Park/jwh00639 ID. Jackson, W.H. 639 Grand Teton National Park, Wyoming. Grand Tetons.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00640 ID. Jackson, W.H. 640 Yellowstone National Park, Wyoming. Lesser Emerald Pool on Iron Spring Creek. 1878.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00641 ID. Jackson, W.H. 641 Yellowstone National Park, Wyoming. Hot Spring on Iron Spring Creek. 1878. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00642 ID. Jackson, W.H. 642 Yellowstone National Park, Wyoming. Marble Cliff Spring in Shoshone Geyser Basin. 1878.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00643 ID. Jackson, W.H. 643 Yellowstone National Park, Wyoming. Iron Spring Creek. 1878.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00644 ID. Jackson, W.H. 644 Yellowstone National Park, Wyoming. From Black Sand Spring. 1878.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00645 ID. Jackson, W.H. 645 Yellowstone National Park, Wyoming. Black Sand Spring. 1878.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00646 ID. Jackson, W.H. 646 Yellowstone National Park, Wyoming. Three Crater Spring. 1878.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00647 ID. Jackson, W.H. 647 Yellowstone National Park, Wyoming. Upper Geyser Basin, viewed from Old Faithful Geyser. 1878(?).U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1872/jwh00648 ID. Jackson, W.H. 648 The Needle Rock (Major Domo), Glen Eyrie, about 1 mile above the Garden of the Gods. Our view is a monolith, some 200 feet in height, and 20 feet in diameter at the base. In the same neighborhood are many other examples of the same peculiar weathering. El Paso County, Colorado. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00649 ID. Jackson, W.H. 649 Cathedral Rock, Garden of the Gods, an end view of the great wall in which is the gateway. El Paso County, Colorado. 1872. #1:/Jackson W.H. Collection-jack1875/jwh00650 ID. Jackson, W.H. 650 Groups of the members of the Survey engaged in the exploration of the southwest. The view represents a mountain experience, in which a wagon is disassembled packed upon the backs of mules, and transported over the more rugged passes of the San Juan Mountains, where it would be impossible to draw it. Colorado 1875. #1:/Yellowstone National Park/jwh00651 ID. Jackson, W.H. 651 Yellowstone National Park, Wyoming. Crater of Old Faithful Geyser in Upper Geyser Basin.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh00652 ID. Jackson, W.H. 652 Yellowstone National Park, Wyoming. In Lower Geyser Basin.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh00653 ID. Jackson, W.H. 653 Yellowstone National Park, Wyoming. Upper Geyser Basin.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh00654 ID. Jackson, W.H. 654 Yellowstone National Park, Wyoming. Upper Geyser Basin.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh00655 ID. Jackson, W.H. 655 Yellowstone National Park, Wyoming. Sawmill Geyser in Upper Geyser Basin. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh00656 ID. Jackson, W.H. 656 Yellowstone National Park, Wyoming. Upper Geyser Basin, viewed from near Grand Geyser.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh00657 ID. Jackson, W.H. 657 Yellowstone National Park, Wyoming. Upper Geyser Basin.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh00658 ID. Jackson, W.H. 658 Yellowstone National Park, Wyoming. Upper Geyser Basin.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh00659 ID. Jackson, W.H. 659 Yellowstone National Park, Wyoming. Sponge Geyser in Upper Geyser Basin.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh00660 ID. Jackson, W.H. 660 Yellowstone National Park, Wyoming. Old Faithful Geyser in Upper Geyser Basin. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh00661 ID. Jackson, W.H. 661 Yellowstone National Park, Wyoming. Castle Geyser in Upper Geyser Basin.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh00662 ID. Jackson, W.H. 662 Yellowstone National Park, Wyoming. Lone Star Geyser in Lone Star Geyser Basin.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00664 ID. Jackson, W.H. 664 Yellowstone National Park, Wyoming. Old Faithful Geyser in Upper Geyser Basin. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1869/jwh00666 ID. Jackson, W.H. 666 Devils Gate Bridge. Weber County, Utah. 1869. #1:/Yellowstone National Park/jwh00667 ID. Jackson, W.H. 667 Yellowstone National Park, Wyoming. Grotto Geyser in Upper Geyser Basin. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh00668 ID. Jackson, W.H. 668 Yellowstone National Park, Wyoming. Grand Geyser. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh00669 ID. Jackson, W.H. 669 Yellowstone National Park, Wyoming. Castle Geyser in Upper Geyser Basin. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh00670 ID. Jackson, W.H. 670 Yellowstone National Park, Wyoming. Riverside Geyser in Upper Geyser Basin. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh00671 ID. Jackson, W.H. 671 Yellowstone National Park, Wyoming. Riverside Geyser in Upper Geyser Basin. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00672 ID. Jackson, W.H. 672 Yellowstone National Park, Wyoming. Daisy Geyser in Upper Geyser Basin.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh00673 ID. Jackson, W.H. 673 Yellowstone National Park, Wyoming. Daisy Geyser.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh00674 ID. Jackson, W.H. 674 Yellowstone National Park, Wyoming. Old Faithful Geyser in Upper Geyser Basin. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh00675 ID. Jackson, W.H. 675 Yellowstone National Park, Wyoming. Old Faithful Geyser in Upper Geyser Basin. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh00676 ID. Jackson, W.H. 676 Yellowstone National Park, Wyoming. Old Faithful Geyser in Upper Geyser Basin. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh00677 ID. Jackson, W.H. 677 Yellowstone National Park, Wyoming. Mammoth Hot Springs.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00678 ID. Jackson, W.H. 678 Yellowstone National Park, Wyoming. Kepler Cascades on the Firehole River. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00679 ID. Jackson, W.H. 679 Yellowstone National Park, Wyoming. Kepler Cascades on the Firehole River. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00680 ID. Jackson, W.H. 680 Yellowstone National Park, Wyoming. Kepler Cascades on the Firehole River. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00681 ID. Jackson, W.H. 681 Yellowstone National Park, Wyoming. Little Firehole Falls.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00682 ID. Jackson, W.H. 682 Yellowstone National Park, Wyoming. Gardner Falls.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00683 ID. Jackson, W.H. 683 Yellowstone National Park, Wyoming. Kepler Cascades on the Firehole River. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00684 ID. Jackson, W.H. 684 Yellowstone National Park, Wyoming. Granite boulder near Yellowstone Canyon. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh00685 ID. Jackson, W.H. 685 Yellowstone National Park, Wyoming. Crystal Cascade between Upper and Lower Falls.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh00687 ID. Jackson, W.H. 687 Yellowstone National Park, Wyoming. Prismatic Terrace.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh00688 ID. Jackson, W.H. 688 Yellowstone National Park, Wyoming. Railroad roundhouse. 1869.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic View. #1:/Yellowstone National Park/jwh00689 ID. Jackson, W.H. 689 Yellowstone National Park, Wyoming. Hayden Valley.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh00690 ID. Jackson, W.H. 690 Yellowstone National Park, Wyoming. From Inspiration Point.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh00691 ID. Jackson, W.H. 691 Yellowstone National Park, Wyoming. Rapids above Upper Falls.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh00692 ID. Jackson, W.H. 692 Yellowstone National Park, Wyoming. Yellowstone Falls, viewed from Artists Point.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1869/jwh00693 ID. Jackson, W.H. 693 Union Pacific Railroad Station, Cheyenne. Laramie County, Wyoming. 1869? #1:/Yellowstone National Park/jwh00694 ID. Jackson, W.H. 694 Yellowstone National Park, Wyoming. Crest of Upper Falls.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00695 ID. Jackson, W.H. 695 Yellowstone National Park, Wyoming. Lower Falls.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh00696 ID. Jackson, W.H. 696 Yellowstone National Park, Wyoming. Sulphur Spring at Crater Hills.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh00697 ID. Jackson, W.H. 697 Yellowstone National Park, Wyoming. Lower Falls.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh00698 ID. Jackson, W.H. 698 Yellowstone National Park, Wyoming. Mary Bay on Yellowstone Lake.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh00699 ID. Jackson, W.H. 699 (5x7) Yellowstone National Park, Wyoming. Southwest shore of Yellowstone Lake.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh00700 ID. Jackson, W.H. 700 Yellowstone National Park, Wyoming. Great Fountain Geyser in Lower Geyser Basin.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh00701 ID. Jackson, W.H. 701 Yellowstone National Park, Wyoming. Old Faithful Geyser in Upper Geyser Basin. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00702 ID. Jackson, W.H. 702 Yellowstone National Park, Wyoming. Big Blue Spring in Lower Geyser Basin. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00703 ID. Jackson, W.H. 703 Yellowstone National Park, Wyoming. Lower Geyser Basin.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Jackson W.H. Collection-jack19ny/jwh00704 ID. Jackson, W.H. 704 Depot at Cheyenne, 516 miles west from Omaha; 6,041 feet elevation. Laramie County, Wyoming. 1869. (Stereoscopic view) #1:/Yellowstone National Park/jwh00705 ID. Jackson, W.H. 705 Yellowstone National Park, Wyoming. Lower Geyser Basin.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Grand Teton National Park/jwh00706 ID. Jackson, W.H. 706 Grand Teton National Park, Wyoming. Great Teton.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh00707 ID. Jackson, W.H. 707 Yellowstone National Park, Wyoming. Coating specimen in the Mammoth Hot Springs area.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1869/jwh00708 ID. Jackson, W.H. 708 Main street in Cheyenne. Laramie County, Wyoming. 1869. (Stereoscopic view) #1:/Yellowstone National Park/jwh00709 ID. Jackson, W.H. 709 Yellowstone National Park, Wyoming. Liberty Cap in the Mammoth Hot Springs area.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh00710 ID. Jackson, W.H. 710 Yellowstone National Park, Wyoming. Pulpit Terrace in the Mammoth Hot Springs area.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00711 ID. Jackson, W.H. 711 Yellowstone National Park, Wyoming. Photo outfit at the summit of Mount Washburn. Stereoscopic view. #1:/Jackson W.H. Collection-jack1869/jwh00712 ID. Jackson, W.H. 712 Promontory Point, the spot where the tracklayers met and laid the "last rail." Elevation is 4,905 feet. Box Elder County, Utah. 1869. (Stereoscopic view) #1:/Yellowstone National Park/jwh00713 ID. Jackson, W.H. 713 Yellowstone National Park, Wyoming. Pulpit Terrace in the Mammoth Hot Springs area.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Jackson W.H. Collection-jack1869/jwh00714 ID. Jackson, W.H. 714 Promontory Point, the spot where the tracklayers met and laid the "last rail". Elevation is 4,905 feet. Box Elder County, Utah. 1869. #1:/Yellowstone National Park/jwh00715 ID. Jackson, W.H. 715 Yellowstone National Park, Wyoming. Mammoth Hot Springs.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Jackson W.H. Collection-jack1969/jwh00716 ID. Jackson, W.H. 716 Street view in Corinne. Box Elder County, Utah. 1869. (Stereoscopic view) #1:/Yellowstone National Park/jwh00717 ID. Jackson, W.H. 717 Yellowstone National Park, Wyoming. Mammoth Hot Springs.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Jackson W.H. Collection-jack1869/jwh00718 ID. Jackson, W.H. 718 Corinne. Box Elder County, Utah. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00719 ID. Jackson, W.H. 719 Crossing Bear River, Salt Lake Valley. Box Elder County, Utah.n.d. 1869? #1:/Jackson W.H. Collection-jack1869/jwh00720 ID. Jackson, W.H. 720 Uinta, mouth of Weber Canyon. Weber County, Utah. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00721 ID. Jackson, W.H. 721 Uinta, mouth of Weber Canyon. Weber County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00722 ID. Jackson, W.H. 722 Uinta, mouth of Weber Canyon. Weber County, Utah. 1869. #1:/Yellowstone National Park/jwh00723 ID. Jackson, W.H. 723 Yellowstone National Park, Wyoming. Lower Yellowstone Falls.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh00724 ID. Jackson, W.H. 724 (3x4) Yellowstone National Park, Wyoming. Lower Yellowstone Falls.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00725 ID. Jackson, W.H. 725 Yellowstone National Park, Wyoming. Artists Point in Yellowstone Canyon. Stereoscopic view. #1:/Yellowstone National Park/jwh00726 ID. Jackson, W.H. 726 Yellowstone National Park, Wyoming. Upper Falls.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Jackson W.H. Collection-jack1869-jack1969/jwh00727 ID. Jackson, W.H. 727 Devils Gate, Weber Canyon. Weber County, Utah. 1869. #1:/Yellowstone National Park/jwh00728 ID. Jackson, W.H. 728 Yellowstone National Park, Wyoming. From the brink of Lower Falls.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Jackson W.H. Collection-jack1869/jwh00729 ID. Jackson, W.H. 729 Devils Gate, Weber Canyon. Weber County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00730 ID. Jackson, W.H. 730 Devils Gate, Weber Canyon. Weber County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00731 ID. Jackson, W.H. 731 Devils Gate, Weber Canyon. Weber County, Utah. 1869. #1:/Yellowstone National Park/jwh00732 ID. Jackson, W.H. 732 Yellowstone National Park, Wyoming. Castle Geyser in Upper Geyser Basin.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1869/jwh00734 ID. Jackson, W.H. 734 Devils Gate, Weber Canyon. Weber County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00735 ID. Jackson, W.H. 735 Devils Gate, Weber Canyon. Weber County, Utah. 1869. #1:/Yellowstone National Park/jwh00736 ID. Jackson, W.H. 736 Yellowstone National Park, Wyoming. Giant Geyser in Upper Geyser Basin.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Jackson W.H. Collection-jack1869/jwh00737 ID. Jackson, W.H. 737 Devils Gate Bridge. Weber County, Utah. 1869. #1:/Yellowstone National Park/jwh00738 ID. Jackson, W.H. 738 Yellowstone National Park, Wyoming. Geyser.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1869/jwh00739 ID. Jackson, W.H. 739 Devils Gate Bridge. Weber County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00740 ID. Jackson, W.H. 740 Devils Gate Bridge. Weber County, Utah. 1869. #1:/Yellowstone National Park/jwh00741 ID. Jackson, W.H. 741 (3x4) Yellowstone National Park, Wyoming. Upper Geyser Basin near Emerald Spring. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1869/jwh00742 ID. Jackson, W.H. 742 Devils Gate Bridge. Weber County, Utah. 1869. #1:/Yellowstone National Park/jwh00743 ID. Jackson, W.H. 743 Yellowstone National Park, Wyoming. Upper Geyser Basin near Grand Geyser. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh00744 ID. Jackson, W.H. 744 Yellowstone National Park, Wyoming. Giant Geyser in Upper Geyser Basin after an eruption.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Jackson W.H. Collection-jack1869/jwh00745 ID. Jackson, W.H. 745 Devils Gate Bridge. Weber County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00746 ID. Jackson, W.H. 746 East from Devils Gate. Weber County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00747 ID. Jackson, W.H. 747 Weber Canyon, east from Devils Gate. Weber County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00748 ID. Jackson, W.H. 748 West end of Tunnel No. 4; a rock cut of 150 feet in Weber Canyon. Weber County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00749 ID. Jackson, W.H. 749 West from the summit of the ridge through which Tunnel No. 4 is cut, looking over Round Valley, to the Wasatch Mountains, in the distance. Morgan and Weber Counties, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00750 ID. Jackson, W.H. 750 West from the summit of the ridge through which Tunnel No. 4 Weber County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00751 ID. Jackson, W.H. 751 West from the summit of the ridge through which Tunnel No. 4 is cut, looking over Round Valley, to the Wasatch Mountains, in the distance. Morgan and Weber Counties, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00752 ID. Jackson, W.H. 752 East of tunnel No.4. Weber County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00753 ID. Jackson, W.H. 753 View between tunnel Nos. 3 and 4, a space of about one half of a mile, but full of grand and picturesque effects. Utah. 1869. #1:/Yellowstone National Park/jwh00754 ID. Jackson, W.H. 754 Yellowstone National Park, Wyoming. Pool of Excelsior Geyser in Midway Geyser Basin.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1869/jwh00755 ID. Jackson, W.H. 755 View between tunnel Nos. 3 and 4, a space of about one half of a mile, but full of grand and picturesque effects. Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00756 ID. Jackson, W.H. 756 View between tunnel Nos. 3 and 4, a space of about one half of a mile, but full of grand and picturesque effects. Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00757 ID. Jackson, W.H. 757 View between tunnel Nos. 3 and 4, a space of about one half of a mile, but full of grand and picturesque effects. Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00758 ID. Jackson, W.H. 758 View between Tunnel Nos. 3 and 4, and a space of about one half of a mile, but full of grand and picturesque effects. Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00759 ID. Jackson, W.H. 759 Tunnel No. 3, from the east; a cut of 550 feet through solid limestone. Morgan County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00760 ID. Jackson, W.H. 760 Tunnel No. 3, from the east; a cut of 550 feet through solid limestone. Morgan County, Utah. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00761 ID. Jackson, W.H. 761 The 1,000 Mile Tree, a solitary pine in Wilhelmina Pass, or the narrows of Weber Canyon, marking the 1,000th mile west of Omaha. Weber County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00762 ID. Jackson, W.H. 762 The 1,000 Mile Tree, a solitary pine in Wilhelmina Pass, or the narrows of Weber Canyon, marking the 1,000th mile west of Omaha. Weber County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00763 ID. Jackson, W.H. 763 Wilhelmina Pass, or the narrows; the entrance to Weber Canyon proper, 7 miles below the mouth of Echo Canyon. Morgan and Summit Counties, Utah. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00764 ID. Jackson, W.H. 764 Pulpit Rock, mouth of Echo Canyon. Summit Canyon, Utah. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00765 ID. Jackson, W.H. 765 Death Rock, mouth of Echo Canyon. Summit County, Utah. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00766 ID. Jackson, W.H. 766 Sentinel Rock, mouth of Echo Canyon. Summit County, Utah. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00767 ID. Jackson, W.H. 767 The Great Eastern, mouth of Echo Canyon. Summit County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00768 ID. Jackson, W.H. 768 Looking down Echo Canyon, near the mouth. Summit County, Utah. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00769 ID. Jackson, W.H. 769 Camp view; under the rocks of Echo. Summit County, Utah. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00770 ID. Jackson, W.H. 770 Looking down the canyon, from above the Great Eastern. Summit County, Utah. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00771 ID. Jackson, W.H. 771 Studies among the great rocks that have fallen from the cliffs of Echo Canyon. Summit County, Utah. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00772 ID. Jackson, W.H. 772 Studies among the great rocks that have fallen from the cliffs of Echo Canyon. Summit County, Utah. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00773 ID. Jackson, W.H. 773 Studies among the great rocks that have fallen from the cliffs of Echo Canyon. Summit County, Utah. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00774 ID. Jackson, W.H. 774 Studies among the great rocks that have fallen from the cliffs of Echo Canyon. Summit County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00775 ID. Jackson, W.H. 775 Studies among the great rocks that have fallen from the cliffs of Echo Canyon. Summit County, Utah. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00776 ID. Jackson, W.H. 776 Studies among the great rocks that have fallen from the cliffs of Echo Canyon. Summit County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00777 ID. Jackson, W.H. 777 Studies among the great rocks that have fallen from the cliffs of Echo Canyon. Summit County, Utah. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00778 ID. Jackson, W.H. 778 Studies among the great rocks that have fallen from the cliffs of Echo Canyon. Summit County, Utah. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00779 ID. Jackson, W.H. 779 Studies among the great rocks that have fallen from the cliffs of Echo Canyon. Summit County, Utah. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00780 ID. Jackson, W.H. 780 Studies among the great rocks that have fallen from the cliffs of Echo Canyon. Summit County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00781 ID. Jackson, W.H. 781 Castle Rocks, from the station. Summit County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00782 ID. Jackson, W.H. 782 Tower on Castle Rock. Summit County, Utah. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00783 ID. Jackson, W.H. 783 Castle Rock, near view. Summit County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00784 ID. Jackson, W.H. 784 Castle Rock, distant view. Summit County, Utah. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00785 ID. Jackson, W.H. 785 Castle Rock, distant view. Summit County, Utah. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00786 ID. Jackson, W.H. 786 Walls of Castle Rock. Summit County, Utah. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00787 ID. Jackson, W.H. 787 Tunnel No. 2 at the head of Echo Canyon. Summit County, Utah. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00788 ID. Jackson, W.H. 788 Tunnel No. 2 at the head of Echo Canyon. Summit County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00789 ID. Jackson, W.H. 789 High trestle work; between Tunnel No. 2 and Wasatch. Summit County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00790 ID. Jackson, W.H. 790 High trestle work; between Tunnel No. 2 and Wasatch. Summit County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00791 ID. Jackson, W.H. 791 High trestle work; between Tunnel No. 2 and Wasatch. Summit County, Utah. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00792 ID. Jackson, W.H. 792 High trestle work; between Tunnel No. 2 and Wasatch. Summit County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00793 ID. Jackson, W.H. 793 Eichars cut, between Tunnel No. 2 and Wasatch. Summit County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00794 ID. Jackson, W.H. 794 Eichars cut, between Tunnel No. 2 and Wasatch. Summit County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00795 ID. Jackson, W.H. 795 High trestle below Tunnel No.2. Summit County, Utah. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00796 ID. Jackson, W.H. 796 Mountain cedar. Summit County, Utah. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00797 ID. Jackson, W.H. 797 Railroad cut near Wasatch. Summit County, Utah. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00798 ID. Jackson, W.H. 798 "The Old Z," or a portion of the track at the head of Echo before the completion of the tunnel. Summit County, Utah. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00799 ID. Jackson, W.H. 799 "The Old Z," or a portion of the track at the head of Echo before the completion of the tunnel. Summit County, Utah. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00800 ID. Jackson, W.H. 800 "The Old Z," or a portion of the track at the head of Echo before the completion of the tunnel. Summit County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00801 ID. Jackson, W.H. 801 Wasatch. Summit County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00802 ID. Jackson, W.H. 802 Needle Rocks, near Wasatch, on the old stage road. Summit County, Utah. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00803 ID. Jackson, W.H. 803 Needle Rocks, near Wasatch, on the old stage road. Summit County, Utah. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00804 ID. Jackson, W.H. 804 Needle Rocks, near Wasatch, on the old stage road. Summit County, Utah. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00805 ID. Jackson, W.H. 805 (Panorama)Bird's-eye panoramic view of Great Salt Lake City. Salt Lake County, Utah. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00806 ID. Jackson, W.H. 806 (Panorama)Bird's-eye panoramic view of Great Salt Lake City. Salt Lake County, Utah. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00807 ID. Jackson, W.H. 807 (Panorama)Bird's-eye panoramic view of Great Salt Lake City. Salt Lake County, Utah. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00808 ID. Jackson, W.H. 808 (Panorama)Bird's-eye panoramic view of Great Salt Lake City. Salt Lake County, Utah. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00809 ID. Jackson, W.H. 809 (Panorama)Bird's-eye panoramic view of Great Salt Lake City. Salt Lake County, Utah. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00810 ID. Jackson, W.H. 810 Signs of the Mormon Co-operative Institution. Salt Lake County, Utah. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00811 ID. Jackson, W.H. 811 Street view in Salt Lake City. Salt Lake County, Utah. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00812 ID. Jackson, W.H. 812 Tower on Castle Rock, Echo Canyon. Summit County, Utah. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00813 ID. Jackson, W.H. 813 Tower on Castle Rock, Echo Canyon. Summit County, Utah. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00814 ID. Jackson, W.H. 814 Reeds Rock, near Sherman Station. Albany County, Wyoming. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00816 ID. Jackson, W.H. 816 Teapot Rock, Green River. Sweetwater County, Wyoming. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00817 ID. Jackson, W.H. 817 View on the west bank of Green River. Sweetwater County, Wyoming. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00818 ID. Jackson, W.H. 818 Banks of Green River. Sweetwater County, Wyoming. 1869? #1:/Jackson W.H. Collection-jack1869/jwh00819 ID. Jackson, W.H. 819 Burning Rock Cut, Green River. Sweetwater County, Wyoming. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00820 ID. Jackson, W.H. 820 Green River Station. Sweetwater County, Wyoming. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00821 ID. Jackson, W.H. 821 Green River Butte and Bridge. Sweetwater County, Wyoming. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00822 ID. Jackson, W.H. 822 Petrified Fish Cut, Green River. Sweetwater County, Wyoming. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00823 ID. Jackson, W.H. 823 Giants Club, Green River. Sweetwater County, Wyoming. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00824 ID. Jackson, W.H. 824 West bank of Green River. Sweetwater County, Wyoming. 1869. #1:/Jackson W.H. Collection-jack1874/jwh00825 ID. Jackson, W.H. 825 View of the Rio Grande near Pole Creek. Hinsdale County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00826 ID. Jackson, W.H. 826 East from Green River. Sweetwater County, Wyoming. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00827 ID. Jackson, W.H. 827 Sherman Station, summit of Black Hills. Albany County, Wyoming. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00828 ID. Jackson, W.H. 828 Sherman Station, summit of Black Hills. Albany County, Wyoming. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00829 ID. Jackson, W.H. 829 Sherman Station Roundhouse. Albany County, Wyoming. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00830 ID. Jackson, W.H. 830 Dale Creek Canyon. Albany County, Wyoming. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00831 ID. Jackson, W.H. 831 Devils Gate of Dale Creek. Albany County, Wyoming. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00832 ID. Jackson, W.H. 832 Devils Gate of Dale Creek. Albany County, Wyoming. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00833 ID. Jackson, W.H. 833 Bridge over the North Platte, first crossing. Albany County, Wyoming. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00834 ID. Jackson, W.H. 834 Dale Creek Bridge, Black Hills. Albany County, Wyoming. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00835 ID. Jackson, W.H. 835 Dale Creek Bridge, Black Hills. Albany County, Wyoming. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00836 ID. Jackson, W.H. 836 South from Dale Creek, Black Hills. Albany County, Wyoming. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00837 ID. Jackson, W.H. 837 Summit, Black Hills, near Dale Creek. Albany County, Wyoming. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00838 ID. Jackson, W.H. 838 The North Platte at Fort Fred Steele. Carbon County, Wyoming. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00839 ID. Jackson, W.H. 839 Dale Creek Bridge, Black Hills. Albany County, Wyoming. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00840 ID. Jackson, W.H. 840 Dale Creek Bridge, Black Hills. Albany County, Wyoming. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00841 ID. Jackson, W.H. 841 Dale Creek Bridge, Black Hills. Albany County, Wyoming. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00842 ID. Jackson, W.H. 842 Dale Creek Bridge, Black Hills. Albany County, Wyoming. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00843 ID. Jackson, W.H. 843 Pioneer's home, Black Hills. Albany County, Wyoming. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00844 ID. Jackson, W.H. 844 View near head of Crow Creek, west of Cheyenne. Laramie County, Wyoming. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00845 ID. Jackson, W.H. 845 View near head of Crow Creek, west of Cheyenne. Laramie County, Wyoming. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00846 ID. Jackson, W.H. 846 View near head of Crow Creek, west of Cheyenne. Laramie County, Wyoming. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00847 ID. Jackson, W.H. 847 View near head of Crow Creek, west of Cheyenne. Laramie County, Wyoming. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00848 ID. Jackson, W.H. 848 View near head of Crow Creek, west of Cheyenne. Laramie County, Wyoming. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00849 ID. Jackson, W.H. 849 View near head of Crow Creek, west of Cheyenne. Laramie County, Wyoming. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00850 ID. Jackson, W.H. 850 Rock study, head of Crow Creek, west of Cheyenne. Laramie County, Wyoming. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00852 ID. Jackson, W.H. 852 Rock study, head of Crow Creek, west of Cheyenne. Laramie County, Wyoming. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00853 ID. Jackson, W.H. 853 Rock study, head of Crow Creek, west of Cheyenne. Laramie County, Wyoming. 1869. #1:/Jackson W.H. Collection-jack1869/jwh00854 ID. Jackson, W.H. 854 Rock study, head of Crow Creek, west of Cheyenne. Laramie County, Wyoming. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00855 ID. Jackson, W.H. 855 Rock study, head of Crow Creek, west of Cheyenne. Laramie County, Wyoming. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh00856 ID. Jackson, W.H. 856 Granite rocks, at foot of Laramie Peak. Albany County, Wyoming. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh00858 ID. Jackson, W.H. 858 Laramie Peak from the foothills. Albany County, Wyoming. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh00859 ID. Jackson, W.H. 859 Pyramid Rock, near the La Bonte, northwest of Laramie Peak. Converse County, Wyoming. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh00860 ID. Jackson, W.H. 860 Natural Bridge, near Fort Fetterman. Converse County, Wyoming. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh00861 ID. Jackson, W.H. 861 High rock at side of Natural Bridge, near Fort Fetterman. Converse County, Wyoming. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh00862 ID. Jackson, W.H. 862 Box Elder Canyon, near Fort Fetterman, southeast of Glenrock. Converse County, Wyoming. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh00863 ID. Jackson, W.H. 863 Badlands near old Fort Casper. Natrona County, Wyoming. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh00864 ID. Jackson, W.H. 864 Badlands near old Fort Casper. Natrona County, Wyoming. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00865 ID. Jackson, W.H. 865 The Amphitheater, Echo Canyon. Summit County, Utah. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1869/jwh00866 ID. Jackson, W.H. 866 Steamboat Rock, Echo Canyon. Summit County, Utah. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh00867 ID. Jackson, W.H. 867 Church Buttes on Blacks Fork near Granger. Uinta County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00868 ID. Jackson, W.H. 868 Head of Buckskin Gulch. Park County, Colorado.n.d. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh00869 ID. Jackson, W.H. 869 Jackson Canyon, near Red Buttes. Park County, Wyoming. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00870 ID. Jackson, W.H. 870 Independence Rock on the Sweetwater.T. 29 N., R. 85 W. Natrona County, Wyoming. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh00871 ID. Jackson, W.H. 871 East from Independence Rock. Natrona County, Wyoming. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh00872 ID. Jackson, W.H. 872 Devils Gate, Sweetwater River. Natrona County, Wyoming. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh00873 ID. Jackson, W.H. 873 Fremonts Peak, distant view in the Wind River Mountains. Fremont County, Wyoming. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh00874 ID. Jackson, W.H. 874 West from southern foothills of Wind River Mountains. Fremont County, Wyoming. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh00875 ID. Jackson, W.H. 875 Green River, in Browns Hole. Daggett County, Utah. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh00876 ID. Jackson, W.H. 876 Bluff near mouth of Henrys Fork. Daggett County, Utah. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh00877 ID. Jackson, W.H. 877 Rocks near Platte Canyon. Douglas County, Colorado. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh00878 ID. Jackson, W.H. 878 Uintah Mountains, head of Blacks Fork. Summit County, Utah. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh00879 ID. Jackson, W.H. 879 Gilberts Peak, Uintah Mountains. Summit County, Utah. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh00880 ID. Jackson, W.H. 880 Natural cave, mouth of Henrys Fork. Daggett County, Utah. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh00881 ID. Jackson, W.H. 881 Church Buttes on Blacks Fork, near Granger. Uinta County, Wyoming. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh00882 ID. Jackson, W.H. 882 Scene on Red Creek, near Browns Hole. Daggett County, Utah. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh00883 ID. Jackson, W.H. 883 Survey camp on Medicine Bow River. Carbon County, Wyoming. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh00884 ID. Jackson, W.H. 884 Rocks near Platte Canyon. Douglas County, Colorado. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh00885 ID. Jackson, W.H. 885 Camp by rock monument near Kountz. Douglas County, Colorado. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh00886 ID. Jackson, W.H. 886 Rock monuments near Larkspur. Douglas County, Colorado. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh00887 ID. Jackson, W.H. 887 Pleasant Park, west of Larkspur. Douglas County, Colorado. 1870. #1:/Jackson W.H. Collection-jack1870/jwh00888 ID. Jackson, W.H. 888 Soda Springs, near Colorado City. El Paso County, Colorado. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh00889 ID. Jackson, W.H. 889 Ute Falls, above Manitou. El Paso County, Colorado. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh00890 ID. Jackson, W.H. 890 Pikes Peak from near Colorado City. El Paso County, Colorado. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh00891 ID. Jackson, W.H. 891 View in Monument Park, curiously eroded sandstone. El Paso County, Colorado. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh00892 ID. Jackson, W.H. 892 View in Monument Park, curiously eroded sandstone. El Paso County, Colorado. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh00893 ID. Jackson, W.H. 893 View in Monument Park, curiously eroded sandstone. El Paso County, Colorado. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh00894 ID. Jackson, W.H. 894 View in Monument Park, curiously eroded sandstone. El Paso County, Colorado. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh00895 ID. Jackson, W.H. 895 Buffalo bones near Colorado City. El Paso County, Colorado. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh00896 ID. Jackson, W.H. 896 Picturesque views of Rocky Mountain scenery. Camp scene. Stevenson, Turnbull, Elliott, Branson, "Potato John" (cook). 1870. (Stereo view available on photo 1674) #1:/Jackson W.H. Collection-jack1871/jwh00897 ID. Jackson, W.H. 897 Ogden Canyon, near mouth. Weber County, Utah. 1871. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1871/jwh00898 ID. Jackson, W.H. 898 Snake River Bridge. Idaho. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00899 ID. Jackson, W.H. 899 Wildcat Canyon. Montana. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00900 ID. Jackson, W.H. 900 Wildcat Canyon. Montana. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00901 ID. Jackson, W.H. 901 Wildcat Canyon. Montana. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00902 ID. Jackson, W.H. 902 Wildcat Canyon. Montana. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00903 ID. Jackson, W.H. 903 Devils Passway. Montana. 1871. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1871/jwh00904 ID. Jackson, W.H. 904 Devils Passway. Montana. 1871. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1871/jwh00905 ID. Jackson, W.H. 905 Hydraulic mining near Virginia City. Madison County, Montana. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00906 ID. Jackson, W.H. 906 Hydraulic mining near Virginia City. Madison County, Montana. 1871. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1871/jwh00907 ID. Jackson, W.H. 907 Hydraulic mining near Virginia City. Madison County, Montana. 1871. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1871/jwh00908 ID. Jackson, W.H. 908 Chinese men sluicing. Madison County, Montana. 1871. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1871/jwh00909 ID. Jackson, W.H. 909 "Panning out." Madison County, Montana. 1871. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1871/jwh00910 ID. Jackson, W.H. 910 "Cradling." Madison County, Montana. 1871. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1871/jwh00911 ID. Jackson, W.H. 911 Madison Bridge. Madison County, Montana. 1871. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1871/jwh00912 ID. Jackson, W.H. 912 Camp near Fort Ellis, near Bridger Canyon. Gallatin County, Montana. 1871. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1871/jwh00913 ID. Jackson, W.H. 913 Mystic Lake, near Fort Ellis. Gallatin County, Montana. 1871. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1871/jwh00914 ID. Jackson, W.H. 914 Mystic Lake, near Fort Ellis. Gallatin County, Montana. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00915 ID. Jackson, W.H. 915 Canyon south of Mystic Lake. Gallatin County, Montana. 1871. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1871/jwh00916 ID. Jackson, W.H. 916 Canyon south of Mystic Lake. Gallatin County, Montana. 1871. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1871/jwh00917 ID. Jackson, W.H. 917 Canyon south of Mystic Lake. Gallatin County, Montana. 1871. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1871/jwh00918 ID. Jackson, W.H. 918 The Mission or Crow Agency. Bighorn County, Montana. 1871. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1871/jwh00919 ID. Jackson, W.H. 919 Yellowstone Valley, 6 miles above Boteler's. Park County, Montana. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00920 ID. Jackson, W.H. 920 Scenery of the Yellowstone. Lower canyon of the Yellowstone. Yellowstone National Park. Wyoming. 1871. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1871/jwh00921 ID. Jackson, W.H. 921 Devils Slide on Cinnabar Mountain. Park County, Montana. 1871. #1:/Jackson W.H. Collection-jack1871/jwh00922 ID. Jackson, W.H. 922 Devils Slide on Cinnabar Mountain. Park County, Montana. 1871. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1871/jwh00923 ID. Jackson, W.H. 923 Devils Slide on Cinnabar Mountain. Park County, Montana. 1871. #1:/Yellowstone National Park/jwh00924 ID. Jackson, W.H. 924 Yellowstone National Park, Wyoming. Liberty Cap in the Mammoth Hot Springs area. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00925 ID. Jackson, W.H. 925 Yellowstone National Park, Wyoming. Column Rocks in the Lower Canyon. 1871. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh00926 ID. Jackson, W.H. 926 Yellowstone National Park, Wyoming. Black Sand Pool.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00927 ID. Jackson, W.H. 927 Yellowstone National Park, Wyoming. Mary Bay on Yellowstone Lake. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Jackson W.H. Collection-jack1871/jwh00928 ID. Jackson, W.H. 928 Union mills. Montana. 1871. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1871/jwh00929 ID. Jackson, W.H. 929 Bird Tail Rock, near Helena. Lewis and Clark County, Montana. 1871. #1:/Jackson W.H. Collection-jack1872/jwh00930 ID. Jackson, W.H. 930 Granite Peak, Little Cottonwood Canyon. Salt Lake County, Utah. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00931 ID. Jackson, W.H. 931 Granite Peak, Little Cottonwood Canyon. Salt Lake County, Utah. 1872. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1872/jwh00932 ID. Jackson, W.H. 932 Quarrying granite for the Mormon Temple. Salt Lake County, Utah. 1872. (Stereoscopic view) #1:/Grand Teton National Park/jwh00933 ID. Jackson, W.H. 933 Grand Teton National Park, Wyoming. Camp at the foot of the Three Tetons. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Grand Teton National Park/jwh00934 ID. Jackson, W.H. 934 Grand Teton National Park, Wyoming. The Three Tetons. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Grand Teton National Park/jwh00935 ID. Jackson, W.H. 935 Grand Teton National Park, Wyoming. The Three Tetons. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Grand Teton National Park/jwh00936 ID. Jackson, W.H. 936 Grand Teton National Park, Wyoming. Teton Range. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Grand Teton National Park/jwh00937 ID. Jackson, W.H. 937 Grand Teton National Park, Wyoming. Teton Range. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Grand Teton National Park/jwh00938 ID. Jackson, W.H. 938 Grand Teton National Park, Wyoming. Teton Range. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Negative damaged. #1:/Grand Teton National Park/jwh00939 ID. Jackson, W.H. 939 Grand Teton National Park, Wyoming. Teton Range. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. Negative damaged. #1:/Grand Teton National Park/jwh00940 ID. Jackson, W.H. 940 Grand Teton National Park, Wyoming. In the Teton Range. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Grand Teton National Park/jwh00941 ID. Jackson, W.H. 941 Grand Teton National Park, Wyoming. Photographing in high places. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1872/jwh00942 ID. Jackson, W.H. 942 Studies on the Left Fork of Teton River. Lincoln County, Wyoming. 1872. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1872/jwh00943 ID. Jackson, W.H. 943 Studies of the Left Fork of Teton River. Lincoln County, Wyoming. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00945 ID. Jackson, W.H. 945 Studies on the Left Fork of Teton River. Lincoln County, Wyoming. 1872. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1872/jwh00947 ID. Jackson, W.H. 947 Studies on the Right Fork of Teton River. Lincoln County, Wyoming. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00948 ID. Jackson, W.H. 948 Studies on the Right Fork of Teton River. Lincoln County, Wyoming. 1872. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1872/jwh00949 ID. Jackson, W.H. 949 Studies on the Right Fork of Teton River. Lincoln County, Wyoming. 1872. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1872/jwh00950 ID. Jackson, W.H. 950 Interior of Sawtell's ranch at Henrys Lake. Fremont County, Idaho. 1872. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1872/jwh00951 ID. Jackson, W.H. 951 Interior of Sawtell's ranch at Henrys Lake. Fremont County, Idaho. 1872. #1:/Yellowstone National Park/jwh00953 ID. Jackson, W.H. 953 Yellowstone National Park, Wyoming. Hot Springs Pools, Lower Geyser Basin. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh00954 ID. Jackson, W.H. 954 Yellowstone National Park, Wyoming. Pool in Lower Geyser Basin.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00955 ID. Jackson, W.H. 955 Yellowstone National Park, Wyoming. Lower Geyser Basin. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-Yellowstone National Park-jack1872/jwh00956 ID. Jackson, W.H. 956 Crater of Old Faithful. Yellowstone National Park, Wyoming. 1872. (Stereoscopic view) #1:/Jackson W.H. Collection-Yellowstone National Park-jack1872/jwh00958 ID. Jackson, W.H. 958 Crater of the Grotto Geyser. Yellowstone National Park. Wyoming. 1872. (Stereoscopic view) #1:/Yellowstone National Park/jwh00959 ID. Jackson, W.H. 959 Yellowstone National Park, Wyoming. Upper Geyser Basin, looking down. 1872. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh00960 ID. Jackson, W.H. 960 Yellowstone National Park, Wyoming. Mammoth Hot Springs. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Jackson W.H. Collection-jack1872/jwh00961 ID. Jackson, W.H. 961 Emigrant Peak from Boteler's. Park County, Montana. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00962 ID. Jackson, W.H. 962 Bridger Canyon near Fort Ellis. Gallatin County, Montana. 1872. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1872/jwh00963 ID. Jackson, W.H. 963 Needle in Bridger Canyon, near Fort Ellis. Gallatin County, Montana. 1872. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1872/jwh00964 ID. Jackson, W.H. 964 Mystic Lake, 12 miles south of Fort Ellis. Gallatin County, Montana. 1872. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1872/jwh00966 ID. Jackson, W.H. 966 Studies about Mount Blackmore. Palace Butte Park, Middle Creek. Gallatin County, Montana. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00967 ID. Jackson, W.H. 967 Palace Butte Park, Middle Creek. Gallatin County, Montana. 1872. (Stereoscopic view) #1:/Yellowstone National Park/jwh00968 ID. Jackson, W.H. 968 Yellowstone National Park, Wyoming. Crater of Castle Geyser in Upper Geyser Basin and Hot Springs Basin. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Jackson W.H. Collection-jack1872/jwh00969 ID. Jackson, W.H. 969 View in the Upper Canyon of Middle Creek. Gallatin County, Montana. 1872. (Stereoscopic view) #1:/Yellowstone National Park/jwh00971 ID. Jackson, W.H. 971 Yellowstone National Park, Wyoming. Hot Spring pools of Upper Geyser Basin. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1872/jwh00972 ID. Jackson, W.H. 972 View in the Upper Canyon of Middle Creek. Gallatin County, Montana. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00974 ID. Jackson, W.H. 974 Cascade of Middle Creek. Gallatin County, Montana. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00975 ID. Jackson, W.H. 975 Cascade of Middle Creek. Gallatin County, Montana. 1872. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1872/jwh00976 ID. Jackson, W.H. 976 Cascade of Middle Creek. Gallatin County, Montana. 1872. (Stereoscopic view available on photo no. 1665) #1:/Jackson W.H. Collection-jack1872/jwh00977 ID. Jackson, W.H. 977 Cascade of Middle Creek. Gallatin County, Montana. 1872. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1872/jwh00978 ID. Jackson, W.H. 978 View near head of Crow Creek, Black Hills, near Sherman. Gallatin County, Montana. 1872. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1872/jwh00979 ID. Jackson, W.H. 979 Mouth of West Gallatin Canyon. Gallatin County, Montana. 1872. (Stereoscopic view) #1:/Yellowstone National Park/jwh0097a ID. Jackson, W.H. 97a Yellowstone National Park, Wyoming. Head of the Yellowstone River. 1871. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1872/jwh00980 ID. Jackson, W.H. 980 Trail in the woods, Gallatin River. Gallatin County, Montana. 1872. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1872/jwh00981 ID. Jackson, W.H. 981 Trail in the woods, Gallatin River. Gallatin County, Montana. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00982 ID. Jackson, W.H. 982 Trail over the woods, Gallatin River. Gallatin County, Montana. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00984 ID. Jackson, W.H. 984 Canyon of the West Gallatin, Montana Territory. Palisades of the West Gallatin River. Gallatin County, Montana. 1872. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1872/jwh00985 ID. Jackson, W.H. 985 Palisades of the West Gallatin River. Gallatin County, Montana. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00986 ID. Jackson, W.H. 986 View in the Middle Canyon. Gallatin County, Montana. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00987 ID. Jackson, W.H. 987 Upper Canyon, West Gallatin River. Gallatin County, Montana. 1872. #1:/Yellowstone National Park/jwh00988 ID. Jackson, W.H. 988 Yellowstone National Park, Wyoming. Shadow Lake on the Divide between the Gallatin River and Yellowstone River. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1872/jwh00990 ID. Jackson, W.H. 990 Lower Madison Canyon. Gallatin and Madison Counties, Montana. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00991 ID. Jackson, W.H. 991 Hydraulic mining in Alder Gulch. Madison County, Montana. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00992 ID. Jackson, W.H. 992 Trout Creek Canyon near Helena. Lewis and Clark County, Montana. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00993 ID. Jackson, W.H. 993 Hell Gate Canyon, near Helena. Lewis and Clark County, Montana. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00994 ID. Jackson, W.H. 994 Avalanche Canyon, near Helena. Lewis and Clark County, Montana. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00995 ID. Jackson, W.H. 995 Mountain cedar. 1872. #1:/Jackson W.H. Collection-jack1872/jwh00996 ID. Jackson, W.H. 996 Bannack Indians. 1872. #1:/Jackson W.H. Collection-jack1875/jwh00997 ID. Jackson, W.H. 997 Surveying party on summit of King Solomon Mountain, near Silvertion. San Juan county, Colorado 1875. #1:/Rocky Mountain National Park/jwh00998 ID. Jackson, W.H. 998 Rocky Mountain National Park, Colorado. Longs Peak, viewed from Estes Park. 1873.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Rocky Mountain National Park/jwh00999 ID. Jackson, W.H. 999 Rocky Mountain National Park, Colorado. Longs Peak and Lily Lake. 1873.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Rocky Mountain National Park/jwh01000 ID. Jackson, W.H. 1000 Rocky Mountain National Park, Colorado. Longs Peak, viewed from its southeastern base at the head of the Saint Vrain. August 3, 1916. #1:/Jackson W.H. Collection-jack1873/jwh01001 ID. Jackson, W.H. 1001 The Colorado or Front Range from Bald Mountain near Gold Hill. Boulder county, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01002 ID. Jackson, W.H. 1002 Castle Rock, Boulder Canyon. Boulder county, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01003 ID. Jackson, W.H. 1003 Roadway under Castle Rock. Boulder County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01004 ID. Jackson, W.H. 1004 Grays Peak. Summit County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01006 ID. Jackson, W.H. 1006 Frozen Lake near James Peak. Clear Creek County, Colorado. June 15, 1873. #1:/Jackson W.H. Collection-jack1873/jwh01007 ID. Jackson, W.H. 1007 Chicago Lakes. Clear Creek County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01008 ID. Jackson, W.H. 1008 Chicago Lakes. Clear Creek County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01009 ID. Jackson, W.H. 1009 Eroded sandstones of Monument Park, near Colorado City. El Paso County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01010 ID. Jackson, W.H. 1010 Eroded sandstones of Monument Park, near Colorado City. El Paso County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01011 ID. Jackson, W.H. 1011 Gateway of the Garden of the Gods, near Pikes Peak. El Paso County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01013 ID. Jackson, W.H. 1013 Gateway of the Garden of the Gods, near Pikes Peak. El Paso County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01014 ID. Jackson, W.H. 1014 Gateway of the Garden of the Gods, near Pikes Peak. El Paso County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01015 ID. Jackson, W.H. 1015 Cathedral Spires, Garden of the Gods. El Paso County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01017 ID. Jackson, W.H. 1017 Ute Falls in Ute Pass. El Paso County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01019 ID. Jackson, W.H. 1019 Mount Lincoln from Hoosier Pass. Park County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01020 ID. Jackson, W.H. 1020 Head of Montgomery Gulch. Park County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01021 ID. Jackson, W.H. 1021 Head of Buckskin Gulch. Park County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01022 ID. Jackson, W.H. 1022 View in Buckskin Gulch. Park County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01023 ID. Jackson, W.H. 1023 Horseshoe Mountain from below. Park County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01024 ID. Jackson, W.H. 1024 Mount Harvard and view down Arkansas River. Lake County, Colorado. 1873. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1873/jwh01025 ID. Jackson, W.H. 1025 Rough water in Arkansas River. Lake County, Colorado. 1873. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1873/jwh01026 ID. Jackson, W.H. 1026 Cascades in the canyon of La Plata Creek. Chaffee County, Colorado. 1873. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1873/jwh01027 ID. Jackson, W.H. 1027 Cascades in the canyon of La Plata Creek. Chaffee County, Colorado. 1873. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1873/jwh01028 ID. Jackson, W.H. 1028 Red Rock Falls, Elk Mountains. Gunnison County, Colorado. 1873. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1873/jwh01030 ID. Jackson, W.H. 1030 Lower Twin Lake, distant view. Lake County, Colorado. 1873. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1873/jwh01032 ID. Jackson, W.H. 1032 Falls on Lake Creek. Lake County, Colorado. 1873. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1873/jwh01033 ID. Jackson, W.H. 1033 Elk Lake and Snowmass Mountain, shadow view. Pitkin County, Colorado. 1873. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1873/jwh01034 ID. Jackson, W.H. 1034 Teocalli Mountain, Elk Mountains. Gunnison County, Colorado. 1873. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1873/jwh01036 ID. Jackson, W.H. 1036 Elk Lake and Snowmass Mountain. Pitkin County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01038 ID. Jackson, W.H. 1038 Treasure Mountain from near Snowmass. Pitkin County, Colorado. 1873. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1873/jwh01039 ID. Jackson, W.H. 1039 Snowmass Mountain from south Elk Mountains. Pitkin County, Colorado. 1873. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1873/jwh01040 ID. Jackson, W.H. 1040 Maroon Mountain. Elk Mountains. Pitkin County, Colorado. 1873. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1873/jwh01042 ID. Jackson, W.H. 1042 Cascades on the Left Fork of Rock Creek, Elk Mountains. Gunnison County, Colorado. 1873. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1873/jwh01043 ID. Jackson, W.H. 1043 Cascades on the Left Fork of Rock Creek, Elk Mountains. Gunnison County, Colorado. 1873. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1873/jwh01044 ID. Jackson, W.H. 1044 Upper Falls on the Right Fork of Rock Creek. Gunnison County, Colorado. 1873. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1873/jwh01045 ID. Jackson, W.H. 1045 Distant view of the Mount of the Holy Cross and Roche Moutonnee Valley. Eagle County, Colorado. 1873. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1873/jwh01046 ID. Jackson, W.H. 1046 Distant view of the Mount of the Holy Cross and Roche Moutonnee Valley. Eagle County, Colorado. 1873. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1873/jwh01047 ID. Jackson, W.H. 1047 Berthoud Pass, north. Grand County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1873/jwh01048 ID. Jackson, W.H. 1048 Berthoud Pass, south. Clear Creek County, Colorado. 1874. (Stereoscopic view) #1:/Rocky Mountain National Park/jwh01049 ID. Jackson, W.H. 1049 Rocky Mountain National Park, Colorado. Falls above Grand Lake. 1874.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh0104a ID. Jackson, W.H. 104a Yellowstone National Park, Wyoming. Yellowstone Lake, viewed from the high hills on the east side of the southeast arm, near where the Upper Yellowstone empties into the lake. View is south, showing the high range that separates the waters of the Yellowstone from those of Wind River. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Photos jwh00104a, jwh00104b, jwh00104c, and jwh00104d form a panorama. #1:/Yellowstone National Park/jwh0104b ID. Jackson, W.H. 104b Yellowstone National Park, Wyoming. Yellowstone Lake, viewed from the high hills on the east side of the southeast arm, near where the Upper Yellowstone empties into the lake. View is east and northeasterly across the southern arms of the lake and Promontory Point to the distant mountains on the farther side. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Photos jwh00104a, jwh00104b, jwh00104c, and jwh00104d form a panorama. #1:/Yellowstone National Park/jwh0104c ID. Jackson, W.H. 104c Yellowstone National Park, Wyoming. Yellowstone Lake, viewed from the high hills on the east side of the southeast arm, near where the Upper Yellowstone empties into the lake. View is east and northeasterly across the southern arms of the lake and Promontory Point to the distant mountains on the farther side. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Photos jwh00104a, jwh00104b, jwh00104c, and jwh00104d form a panorama. #1:/Yellowstone National Park/jwh0104d ID. Jackson, W.H. 104d Yellowstone National Park, Wyoming. Yellowstone Lake, viewed from the high hills on the east side of the southeast arm, near where the Upper Yellowstone empties into the lake. View is south, past Promontory Point, into the large open space of the lake where it fades away into the horizon. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Photos jwh00104a, jwh00104b, jwh00104c, and jwh00104d form a panorama. #1:/Jackson W.H. Collection-jack1873/jwh01050 ID. Jackson, W.H. 1050 Berthoud Pass, southeast. Clear Creek County, Colorado. 1874. (Stereoscopic view) #1:/Rocky Mountain National Park/jwh01052 ID. Jackson, W.H. 1052 Rocky Mountain National Park, Colorado. Grand Lake in Middle Park. 1874. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Rocky Mountain National Park/jwh01053 ID. Jackson, W.H. 1053 Rocky Mountain National Park, Colorado. Fisherman's cabin at Grand Lake. 1874.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1874/jwh01054 ID. Jackson, W.H. 1054 Falls above Grand Lake. Grand County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh01055 ID. Jackson, W.H. 1055 Hot Springs, Middle Park. Grand County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01056 ID. Jackson, W.H. 1056 View east from Hot Springs, Middle Park. Grand County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01057 ID. Jackson, W.H. 1057 View east from Hot Springs, Middle Park. Grand County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01059 ID. Jackson, W.H. 1059 View up the Blue River from the Colorado River. Grand County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01060 ID. Jackson, W.H. 1060 View up the Muddy Creek from the Colorado River. Grand County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01061 ID. Jackson, W.H. 1061 Gore Canyon, upper end. Grand County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01062 ID. Jackson, W.H. 1062 Gore Canyon. View near its mouth, looking down. The Colorado River here makes its first entry of the canyon, flowing quietly and smoothly through the upturned beds of sandstone that lie up against the more massive rocks of the canyon proper. Grand County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01064 ID. Jackson, W.H. 1064 Gore Canyon, view within. Grand County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01065 ID. Jackson, W.H. 1065 View on the Blue River near Mount Powell, looking up. Summit County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01066 ID. Jackson, W.H. 1066 View on the Blue River near Mount Powell, looking up. Summit County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01067 ID. Jackson, W.H. 1067 View on the Blue River, looking west across the river. Summit County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01068 ID. Jackson, W.H. 1068 View on the Blue River, looking west across the river. Summit County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01069 ID. Jackson, W.H. 1069 View among the rocks of Pleasant Park, near Larkspur. Douglas County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01070 ID. Jackson, W.H. 1070 View among the rocks of Pleasant Park, near Larkspur. Douglas County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01071 ID. Jackson, W.H. 1071 View down the Blue River from near Ute Peak. Summit County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01073 ID. Jackson, W.H. 1073 The Liberty Cap, Pleasant Park. Douglas County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh01074 ID. Jackson, W.H. 1074 The Liberty Cap, Pleasant Park. Douglas County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01075 ID. Jackson, W.H. 1075 Tablelands on Colorado Divide. El Paso County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01076 ID. Jackson, W.H. 1076 Tablelands on Colorado Divide. El Paso County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01077 ID. Jackson, W.H. 1077 Tree study on tableland, near Palmer Lake. El Paso County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01078 ID. Jackson, W.H. 1078 Castle Rocks on the Divide, near Monument. El Paso County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01079 ID. Jackson, W.H. 1079 Natural arch under Castle Rock, near Monument. El Paso County, Colorado. 1874. (Stereoscopic view) #1:/Yellowstone National Park/jwh0107a ID. Jackson, W.H. 107a Yellowstone National Park, Wyoming. No information provided. #1:/Jackson W.H. Collection-jack1874/jwh01080 ID. Jackson, W.H. 1080 View south from Divide. El Paso County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh01081 ID. Jackson, W.H. 1081 Geological study. El Paso County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh01082 ID. Jackson, W.H. 1082 Sandstone monument, near Divide. El Paso County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01083 ID. Jackson, W.H. 1083 Sandstone tower, near Monument Park. El Paso County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01084 ID. Jackson, W.H. 1084 Pine tree and castellated rocks. El Paso County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh01085 ID. Jackson, W.H. 1085 Studies in Monument Park. El Paso County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01086 ID. Jackson, W.H. 1086 The Rio Grande Del Norte, below Wagon Wheel Gap. Mineral County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh01087 ID. Jackson, W.H. 1087 The Rio Grande Del Norte, below Wagon Wheel Gap. Mineral County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01088 ID. Jackson, W.H. 1088 Wagon Wheel Gap, Rio Grande River. Mineral County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01089 ID. Jackson, W.H. 1089 Wagon Wheel Gap, Rio Grande River. Mineral County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh01090 ID. Jackson, W.H. 1090 Wagon Wheel Gap, Rio Grande River. Mineral County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01092 ID. Jackson, W.H. 1092 Antelope Park. Mineral County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh01093 ID. Jackson, W.H. 1093 Bristol Head, Antelope Park. Mineral County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh01094 ID. Jackson, W.H. 1094 North of Bristol Head, Antelope Park. Mineral County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01095 ID. Jackson, W.H. 1095 Saint Marys Lake, under Bristol Head. Mineral County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01096 ID. Jackson, W.H. 1096 View on the Rio Grande, near Lost Trail Creek. Hinsdale County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01097 ID. Jackson, W.H. 1097 View on the Rio Grande, near Lost Trail Creek. Hinsdale County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01098 ID. Jackson, W.H. 1098 View of the Rio Grande, near Pole Creek. Hinsdale County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01099 ID. Jackson, W.H. 1099 The Rio Grande, near Lost Trail Creek. Hinsdale County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01100 ID. Jackson, W.H. 1100 The Rio Grande, near Lost Trail Creek. Hinsdale County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01101 ID. Jackson, W.H. 1101 Bakers Park, from the mouth of Arastra Gulch. San Juan County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01102 ID. Jackson, W.H. 1102 Arastra Gulch, Bakers Park. San Juan County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01103 ID. Jackson, W.H. 1103 Photographer on summit of Sultan Mountain. San Juan County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01105 ID. Jackson, W.H. 1105 Trout Lake. Colorado.n.d. #1:/Jackson W.H. Collection-jack1874/jwh01106 ID. Jackson, W.H. 1106 Ruins about the head of the McElmo. Montezuma County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01107 ID. Jackson, W.H. 1107 Ruins about the head of the McElmo. Montezuma County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01108 ID. Jackson, W.H. 1108 Ruins about the Legendary Butte on the McElmo. Montezuma County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01109 ID. Jackson, W.H. 1109 Ruins near the Legendary Butte. Montezuma County, Colorado. 1874. (Stereoscopic view) #1:/Yellowstone National Park/jwh0110a ID. Jackson, W.H. 110a (7 " x 9 ") Yellowstone National Park, Wyoming. Crater of Grotto Geyser, a few rods below Giant Geyser in Upper Geyser Basin, and ensconced in a grove of trees. It differs externally from all the other craters, but, like the rest, consists of a mass of siliceous sinter, 12 feet in diameter and 5 feet high, full of large sinuous orifices from which the water is projected during an eruption. 1871. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1874/jwh01110 ID. Jackson, W.H. 1110 Cliffs near the cave dwellings. Montezuma County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01111 ID. Jackson, W.H. 1111 Triangulation, summit of Sultan Mountain. Wilson and Rhoda. San Juan County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01112 ID. Jackson, W.H. 1112 Topographical work. Chittenden and Holmes. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01113 ID. Jackson, W.H. 1113 Camp group. La Plata miners. Colorado. 1874. #1:/Jackson W.H. Collection-jack1874/jwh01114 ID. Jackson, W.H. 1114 Camp group. Captain John Moss. 1874. #1:/Jackson W.H. Collection-jack1874/jwh01115 ID. Jackson, W.H. 1115 Camp group. La Plata miner's camp. Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01116 ID. Jackson, W.H. 1116 Camp group. Emilie Painter on pony. Omaha Reservation. 1874. #1:/Jackson W.H. Collection-jack1874/jwh01117 ID. Jackson, W.H. 1117 Camp scene.n.d. #1:/Yellowstone National Park/jwh01119 ID. Jackson, W.H. 1119 Yellowstone National Park, Wyoming. Camp scene. Ferdinand Hayden, geologist- in-charge.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh0111a ID. Jackson, W.H. 111a Yellowstone National Park, Wyoming. Lake on the Divide east of Yellowstone Lake. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh01120 ID. Jackson, W.H. 1120 Yellowstone National Park, Wyoming. Camp scene. James Stromson(Stevenson?) U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh01121 ID. Jackson, W.H. 1121 (4x4) Yellowstone National Park, Wyoming. Camp scene. Dr.C.S. Turnbull, secretary. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh01122 ID. Jackson, W.H. 1122 Yellowstone National Park, Wyoming. Camp scene.A.L. Ford, mineralogist, who was on only the 1870 expedition.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh01123 ID. Jackson, W.H. 1123 Yellowstone National Park, Wyoming. Camp scene.E. Campbell Carrington, zoologist.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh01124 ID. Jackson, W.H. 1124 Yellowstone National Park, Wyoming. Camp scene.H.D. Schmitt, taxidermist. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh01125 ID. Jackson, W.H. 1125 Yellowstone National Park, Wyoming. Camp scene. Sanford R. Gifford, artist, who was only on the 1870 expedition.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh01126 ID. Jackson, W.H. 1126 Yellowstone National Park, Wyoming. Camp scene. Steve Hovey, "wagon boss." U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh01127 ID. Jackson, W.H. 1127 Yellowstone National Park, Wyoming. Camp scene. Willim Henry Jackson's horse. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1870/jwh01129 ID. Jackson, W.H. 1129 Camp scene. Officer's mount. Camp Stambaugh (South Pass 1870). Fremont County, Wyoming. 1870? #1:/Yellowstone National Park/jwh01130 ID. Jackson, W.H. 1130 Yellowstone National Park, Wyoming. Camp scene. Holman.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh01131 ID. Jackson, W.H. 1131 Yellowstone National Park, Wyoming. Camp scene. James Stevenson, Adams, Frank Bradley, Dr. Curtis. These men were together only on the 1872 expedition. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Jackson W.H. Collection-jack1875/jwh01132 ID. Jackson, W.H. 1132 San Cristobal Lake. Hinsdale County, Colorado. 1875. (Stereoscopic view). #1:/Jackson W.H. Collection-jack1875/jwh01133 ID. Jackson, W.H. 1133 Argenta Falls, Lake Fork. Hinsdale County, Colorado. 1875. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1875/jwh01134 ID. Jackson, W.H. 1134 Lower Falls of Lake Fork. Hinsdale County, Colorado. 1875. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1875/jwh01135 ID. Jackson, W.H. 1135 Lower Falls of Lake Fork. Hinsdale County, Colorado. 1875. #1:/Jackson W.H. Collection-jack1875/jwh01137 ID. Jackson, W.H. 1137 Lower Falls of Lake Fork. Hinsdale County, Colorado. 1875. Similar to photo no 1654. #1:/Jackson W.H. Collection-jack1875/jwh01138 ID. Jackson, W.H. 1138 Uncompahgre Mountain from the east. Hinsdale County, Colorado. 1875. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1875/jwh01139 ID. Jackson, W.H. 1139 Uncompahgre Mountain from the south. Hinsdale County, Colorado. 1875. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1875/jwh01140 ID. Jackson, W.H. 1140 View south across Henson Creek, from near Uncompahgre. Hinsdale County, Colorado. 1875. #1:/Jackson W.H. Collection-jack1875/jwh01141 ID. Jackson, W.H. 1141 View south across Henson Creek, from near Uncompahgre. Hinsdale County, Colorado. 1875. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1875/jwh01142 ID. Jackson, W.H. 1142 Camp in Bakers Park, near Howardsville. San Juan County, Colorado. 1875. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1875/jwh01143 ID. Jackson, W.H. 1143 Camp in Bakers Park, near Howardsville. San Juan County, Colorado. 1875. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1875/jwh01144 ID. Jackson, W.H. 1144 Howardsville, Bakers Park. San Juan County, Colorado. 1875. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1875/jwh01145 ID. Jackson, W.H. 1145 Howardsville, Bakers Park. San Juan County, Colorado. 1875. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1875/jwh01146 ID. Jackson, W.H. 1146 Cascades at the head of Cunningham Gulch. San Juan County, Colorado. 1875. #1:/Jackson W.H. Collection-jack1875/jwh01147 ID. Jackson, W.H. 1147 Trail to the North Star mine up King Solomon Mountain, Cunningham Gulch. San Juan County, Colorado. 1875. #1:/Jackson W.H. Collection-jack1875/jwh01148 ID. Jackson, W.H. 1148 View up the summit of King Solomon Mountain. San Juan County, Colorado. 1875. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1875/jwh01149 ID. Jackson, W.H. 1149 Bakers Park, looking up from below Howardsville. San Juan County, Colorado. 1875. #1:/Jackson W.H. Collection-jack1875/jwh01150 ID. Jackson, W.H. 1150 Bakers Park, looking up from below Howardsville. San Juan County, Colorado. 1875. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1875/jwh01151 ID. Jackson, W.H. 1151 Bakers Park, view on the Animas, near mouth of Arastra Gulch. San Juan County, Colorado. 1875. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1875/jwh01152 ID. Jackson, W.H. 1152 Bakers Park, view on the Animas, near mouth of Arastra Gulch. San Juan County, Colorado. 1875. #1:/Jackson W.H. Collection-jack1875/jwh01153 ID. Jackson, W.H. 1153 Borens Cascade, La Plata Mountains. La Plata County, Colorado. 1875. #1:/Jackson W.H. Collection-jack1875/jwh01154 ID. Jackson, W.H. 1154 Head of Borens Gulch, La Plata Mountains. La Plata County, Colorado. 1875. #1:/Jackson W.H. Collection-jack1875/jwh01155 ID. Jackson, W.H. 1155 Head of Borens Gulch, La Plata Mountains. La Plata County, Colorado. 1875. #1:/Jackson W.H. Collection-jack1875/jwh01157 ID. Jackson, W.H. 1157 Canyon of the San Juan. A few miles below the mouth of the Rio de Chelly immense great walls of dark brown sandstone hem the river closely in and which grow in height and crowd still closer upon the river until they culminate in the Great Canyon of the Colorado. San Juan County, Utah. 1875. (Stereo view is available photo no. 1660) #1:/Jackson W.H. Collection-jack1875/jwh01158 ID. Jackson, W.H. 1158 View in the canyon of the San Juan, below the mouth of the Rio de Chelly. San Juan County, Utah. 1875. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1875/jwh01159 ID. Jackson, W.H. 1159 Cave Rocks, sandstone butte, near Sierra La Sal. Scene of Gardner's fight. San Juan County, Utah. 1875. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1875/jwh01160 ID. Jackson, W.H. 1160 Cave ruins in the bluffs overhanging the San Juan River. San Juan County, Utah. 1875. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1875/jwh01161 ID. Jackson, W.H. 1161 Cave ruins in the bluffs overhanging the San Juan River. San Juan County, Utah. 1875. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1875/jwh01162 ID. Jackson, W.H. 1162 Ruins in Montezuma Canyon, containing stones of unusual size.E.A. Barber and Henry Lee in view. San Juan County, Utah. 1875. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1875/jwh01163 ID. Jackson, W.H. 1163 Ruins in Montezuma Canyon, encircled by large stones set upright in the earth. San Juan County, Utah. 1875. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1875/jwh01164 ID. Jackson, W.H. 1164 Chittenden's assistant, on the lookout. 1875. #1:/Jackson W.H. Collection-jack1875/jwh01165 ID. Jackson, W.H. 1165 Bakers Park, view south from above Howardsville. San Juan County, Utah. 1874. #1:/Jackson W.H. Collection-jack1874/jwh01166 ID. Jackson, W.H. 1166 Lake Santa Maria and Bristol Head. Mineral County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01167 ID. Jackson, W.H. 1167 View on the Blue River, looking west across the river. Summit County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01168 ID. Jackson, W.H. 1168 View on the Blue River, looking west across the river. Summit County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01169 ID. Jackson, W.H. 1169 Hot Springs, Middle Park. Grand County, Colorado. 1874. #1:/Jackson W.H. Collection-jack18ny/jwh01171 ID. Jackson, W.H. 1171 Lake in San Luis Valley. Colorado.n.d. #1:/Jackson W.H. Collection-jack1873/jwh01172 ID. Jackson, W.H. 1172 Looking down Clear Creek from near Grays Peak. Clear Creek County, Colorado. 1873. (Stereoscopic view) #1:/Jackson W.H. Collection-jack18ny/jwh01173 ID. Jackson, W.H. 1173 Ute Indian camp, Los Pinos Agency. La Plata County, Colorado.n.d. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01174 ID. Jackson, W.H. 1174 Sultan Mountains from Arastra Gulch. San Juan County, Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack18ny/jwh01175 ID. Jackson, W.H. 1175 Church in Chihuahua. Mexico.n.d. (Stereoscopic view) #1:/Jackson W.H. Collection-jack18ny/jwh01176 ID. Jackson, W.H. 1176 Presumably view of Missouri (?) River in Nebraska.n.d. #1:/Jackson W.H. Collection-jack1869/jwh01177 ID. Jackson, W.H. 1177 Reeds Rock, near Sherman Station. Albany County, Wyoming. 1869? (Stereoscopic view) #1:/Colorado National Monument/jwh01178 ID. Jackson, W.H. 1178 Colorado National Monument, Colorado. Rock formation.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh01180 ID. Jackson, W.H. 1180 Yellowstone National Park, Wyoming. East shore of Yellowstone Lake, showing the valley of the Upper Yellowstone River. 1878(?).U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh01182 ID. Jackson, W.H. 1182 Yellowstone National Park, Wyoming. Crater of Grotto Geyser, situated near the lower end of Upper Geyser Basin. An irregular mound, full of sinuous orifices, from which the water is projected in all directions during eruptions. The eruptions are quite numerous, going off nearly every three hours, each lasting about fifteen minutes. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh01183 ID. Jackson, W.H. 1183 Yellowstone National Park, Wyoming. Crater of Giant Geyser in Upper Geyser Basin. 1883(?). #1:/Yellowstone National Park/jwh01184 ID. Jackson, W.H. 1184 Yellowstone National Park, Wyoming. Old Faithful in Upper Geyser Basin in action. 1883(?). #1:/Yellowstone National Park/jwh01185 ID. Jackson, W.H. 1185 Yellowstone National Park, Wyoming. Upper Geyser Basin, viewed from Old Faithful. 1883(?). #1:/Yellowstone National Park/jwh01186 ID. Jackson, W.H. 1186 Yellowstone National Park, Wyoming. Upper Geyser Basin, viewed from the crater of Old Faithful, looking down. In the middle distance is Grand Geyser in eruption, and on the left is Castle Geyser. Within the scope of this view are all of the largest and most active geysers. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh01187 ID. Jackson, W.H. 1187 Yellowstone National Park, Wyoming. Crater of Castle Geyser in Upper Geyser Basin.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh01188 ID. Jackson, W.H. 1188 Yellowstone National Park, Wyoming. Hot Springs in the Queen's Laundry. 1883(?). #1:/Yellowstone National Park/jwh01190 ID. Jackson, W.H. 1190 Yellowstone National Park, Wyoming. Mammoth Hot Springs. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh01191 ID. Jackson, W.H. 1191 Yellowstone National Park, Wyoming. Liberty Cap in the Mammoth Hot Springs area. A calcareous mound, 45 feet in height, from the apex of which at one time issued a hot spring, building up and growing higher, until finally it closed itself up and died out, there not being sufficient force to impel the water to a greater height. 1872(?).U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh01192 ID. Jackson, W.H. 1192 Yellowstone National Park, Wyoming. Mammoth Hot Springs. These springs cover an area of about 4 square miles on the right side of the Gardner River, some 3 miles above its junction with the Yellowstone River. The temperature of the principal springs varies from 120 degrees to the boiling point, and they hold in solution a large amount of calcareous matter which has been deposited to a depth of many hundred feet. Upon the slopes, the deposit takes the form of beautifully scalloped basins filled with water of varying temperature, according to their remoteness from their source. The oxidation of the mineral substances contained in the water has stained the basins to every conceivable shade of red and yellow, forming rich contrasts to the vivid greens and blues of the waters. 1872(?).U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-Yellowstone National Park-jack1872/jwh01193 ID. Jackson, W.H. 1193 Mammoth Hot Springs, on Gardiner's River. These springs cover an area of about four square miles on the right-hand side of Gardiner's River, some three miles above its junction with Yellowstone. The temperature of the principal springs varies from 120 degrees to the boiling point, and they hold in solution a large amount of calcareous matter, which has been deposited to a depth of many hundred feet. Upon the slopes the deposit takes the form of beautifully-scalloped basins filled with water of varying temperature, according to their remoteness from their source. The oxidation of the mineral substances contained in the water has stained the basins to every conceivable shade of red and yellow, forming rich contrasts to the vivid greens and blues of the waters. Yellowstone National Park, Wyoming. 1872? #1:/Yellowstone National Park/jwh01194 ID. Jackson, W.H. 1194 Yellowstone National Park, Wyoming. Glen Springs in the Mammoth Hot Springs area. 1878(?).U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh01195 ID. Jackson, W.H. 1195 Yellowstone National Park, Wyoming. Mammoth Hot Springs, viewed from Fort Hill. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh01197 ID. Jackson, W.H. 1197 Yellowstone National Park, Wyoming. Jupiter Terrace in the Mammoth Hot Springs area. 1878(?).U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh01198 ID. Jackson, W.H. 1198 Yellowstone National Park, Wyoming. Summit of Jupiter Terrace in the Mammoth Hot Springs area. 1872(?).U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh01201 ID. Jackson, W.H. 1201 Yellowstone National Park, Wyoming. Minerva Terrace in the Mammoth Hot Springs area. 1878(?).U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh01202 ID. Jackson, W.H. 1202 Yellowstone National Park, Wyoming. Columnar basalts capping the brink of Yellowstone Canyon. Tower Falls. 1878(?).U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh01203 ID. Jackson, W.H. 1203 Yellowstone National Park, Wyoming. Grand Canyon of the Yellowstone, viewed from the foot of the Lower Falls, showing the Red Pinnacle. 1878(?).U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh01204 ID. Jackson, W.H. 1204 Yellowstone National Park, Wyoming. Grand Canyon of the Yellowstone, viewed from the brink of the Lower Falls. 1878(?).U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh01205 ID. Jackson, W.H. 1205 Yellowstone National Park, Wyoming. Upper Falls of the Yellowstone, half a mile above the Lower Falls. Photographed from a point nearly over it, at a height of 40 feet above the river. Height is 140 feet. 1878(?).U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh01206 ID. Jackson, W.H. 1206 Yellowstone National Park, Wyoming. Lower Falls of the Yellowstone, 397 feet in height; width of the river at the brink, 10 feet. Photographed from a point a quarter of a mile below the falls and 30 feet above the bottom of the canyon. The perpendicular walls about the falls form the upper end of the Grand Canyon. 1872(?).U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh01207 ID. Jackson, W.H. 1207 Yellowstone National Park, Wyoming. Great Falls of the Yellowstone. 1878(?). U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh01209 ID. Jackson, W.H. 1209 Yellowstone National Park, Wyoming. Upper Falls of the Yellowstone and upper Canyon, viewed from near the brink of the Great Falls. 1872(?).U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh01211 ID. Jackson, W.H. 1211 Yellowstone National Park, Wyoming. Falls on the left fork of Gardner River. 1878.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh01212 ID. Jackson, W.H. 1212 Yellowstone National Park, Wyoming. Lower Yellowstone Valley, looking north from the first canyon. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh01213 ID. Jackson, W.H. 1213 Yellowstone National Park, Wyoming. Lower Yellowstone Valley, looking east. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Grand Teton National Park/jwh01214 ID. Jackson, W.H. 1214 Grand Teton National Park, Wyoming. Camp at the foot of the Three Tetons in Teton Basin, 10 miles in a direct line from them. Elevation of the camp is 6,646 feet. Mount Hayden (Grand Teton), the highest Teton, rises 7,187 feet above it. 1872(?).U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Grand Teton National Park/jwh01215 ID. Jackson, W.H. 1215 Grand Teton National Park, Wyoming. In the Teton Range, looking south over the West Teton River and up its right-hand fork. On the right side of the canyon is an exposure of over 2,000 feet of limestone, very nearly perpendicular. The distance rolls away into the perpetually snow-covered plateau of the Summit Range. 1872(?).U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Grand Teton National Park/jwh01216 ID. Jackson, W.H. 1216 Grand Teton National Park, Wyoming. Grand Tetons, viewed from near the head of Buffalo Fork. 1878.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Grand Teton National Park/jwh01217 ID. Jackson, W.H. 1217 Grand Teton National Park. Teton Range, viewed from one of the summits of limestone ridges at an elevation of 11,50 feet, looking directly east over a broad, snow-covered plateau 4 miles wide. This is the average height of the range, only the grand peaks in the distance rising above it. Just at the foot of the Tetons is the Grand Canyon, 2,000 feet below the surface. 1872(?). U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Grand Teton National Park/jwh01218 ID. Jackson, W.H. 1218 Grand Teton National Park, Wyoming. Teton Range and Jackson Lake. 1872(?). U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Grand Teton National Park/jwh01219 ID. Jackson, W.H. 1219 Grand Teton National Park, Wyoming. The Tetons, viewed from the east. 1872(?).U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh01220 ID. Jackson, W.H. 1220 Yellowstone National Park, Wyoming. Tower Falls on Tower Creek, a small tributary of the Yellowstone river, 15 miles below the falls and about 50 yards above the junction of the streams. They are 132 feet in height, emerging from between great towers of closely-cemented breccia that extend far up its canyon toward its source on Mount Washburn. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh01221 ID. Jackson, W.H. 1221 Yellowstone National Park, Wyoming. Mount Doane, Mount Langford, and Mount Stevenson, near Yellowstone Lake. 1878.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1873/jwh01222 ID. Jackson, W.H. 1222 Eroded sandstones in Monument Park. Situated upon a small tributary of Monument Creek, about 9 miles north of Colorado City. The Denver and Rio Grande Railroad, a narrow-gauge road, running south from Denver, passes across the lower end of the park. The most interesting groups, however, lie back two or three miles from it. El Paso County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01223 ID. Jackson, W.H. 1223 Pikes Peak in the distance about 10 miles, as seen looking over the walls of the Garden of the Gods. Its elevation above the sea is 14,216 feet, and above Colorado City 7,824 feet. It is entirely detached from the main range, lying some 75 miles to the east of it. With its spurs, it forms the southeastern boundary of South Park. El Paso County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1872/jwh01225 ID. Jackson, W.H. 1225 Mystic Lake on Bozeman Creek. In the mountains about the head of the East Gallatin River, 12 miles south of Fort Ellis. Gallatin County, Montana. 1872. #1:/Jackson W.H. Collection-jack1872/jwh01226 ID. Jackson, W.H. 1226 Palace Butte, one of the spurs of Mount Blackmore, which has an elevation of 10,134 feet, and this portion of it rises abruptly nearly 3,000 feet above the valley at its foot. Gallatin County, Montana. 1872. #1:/Jackson W.H. Collection-jack1872/jwh01227 ID. Jackson, W.H. 1227 Head of Middle Creek near Mount Blackmore. The large amphitheater is filled with perpetual snows, from which the creek is fed. The crest is the divide between the waters of the East and West Gallatin. Gallatin County, Montana. 1872. #1:/Jackson W.H. Collection-jack1873/jwh01228 ID. Jackson, W.H. 1228 Long's Peak. View from the summit of the Divide, between the waters of the Saint Vrain and the Boulder, southeast about 10 miles from the peak, and looking a little north of west, showing the line of sharpsnowy crests that extend southward. Among them rises the Saint Vrain, flowing down through the deep gorge in the center of the view. The foreground is characteristic of all the country lying inside the foothills, a great plateau of granites, seamed and furrowed into deep ravines and canyons, and covered to a great extent with dense groves of pine. Boulder County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01229 ID. Jackson, W.H. 1229 View eastwardly, giving a glimpse of the range lying to the north of Estes Park. In the center, Mount Lilly, a ridge of gneissic schists and quartzites, rises about 2,500 feet above the plateau. The foreground is characteristic of all the country lying inside the foothills, canyons, and covered to a great extent with dense grooves of pine. Boulder County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01230 ID. Jackson, W.H. 1230 View of the Colorado or Front Range from near Gold Hill, as seen from Bald Mountain, about 3 miles west from the Ward mining district, embracing a view from Long's Peak on the north, to near Arapahoe on the south. In the foreground is one of the little snow-fed lakes, so numerous throughout the mountains, and forming a pleasant variety to the monotony of numberless snow-white peaks. Although this view was made late in June, it will be seen that the hillsides are heavily draped in a mantle of snow, lying very deep through all the forest. The difficulty of reaching even this altitude was very great, requiring most laborious plunging through the thick timber and deep drifts. At the extreme left are the two sharp crests of Smith's Peak. In the center is a number of grand peaks, but nameless. Boulder County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873-Mines of Caribou/jwh01231 ID. Jackson, W.H. 1231 The Front Range. The Snowy Range west from North Boulder. Among the hills in the distance are the town and the famous mines of Caribou. The town of Middle Boulder and the reduction-works are about 4 miles below, in the valley. Beyond the hills the very tip only of Arapahoe can be seen. Boulder County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01232 ID. Jackson, W.H. 1232 Arapahoe Peak. Boulder County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01233 ID. Jackson, W.H. 1233 James Peak and Parry Peak, Colorado Front Range, from a high point east of the peaks, at an elevation of 12,200 feet, the James Peak being 13,283 feet above the sea. They are on the main divide, which, at this point, turns sharply to the west, describing a great arch around to Grays Peak and Mount Rosalie. Like the rest of the range, it is of metamorphic rock, gneiss and schist predominating. Clear Creek County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01237 ID. Jackson, W.H. 1237 View west from the summit of Mount Lincoln. The foreground is the continuation from Bross to Lincoln. At the right are the buildings highest mine in the United States. In the distance is the Sawatch Range, lying west of the Arkansas. The prominent peaks in the range are Grand, Elbert, La Plata, and Harvard, the highest mountains in the whole Rocky Mountain chain. Lake, Park, and Summit Counties, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01238 ID. Jackson, W.H. 1238 Distant view of the mountain of the Holy Cross from the summit of Mount Lincoln. The deep amphitheater at our feet is the head of Montgomery Gulch. Beyond, in the middle distance, lies Tennessee Pass. Lake, Park, and Summit Counties, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01239 ID. Jackson, W.H. 1239 Around to the north, the prominent point in the view is Quandary Peak, a few feet only below Lincoln. Away in the distance is the Blue River Range. Lake, Park, and Summit Counties, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01240 ID. Jackson, W.H. 1240 View looking down a spur of Mount Lincoln, over Montgomery, 3,500 feet below. In the distance on the horizon are Gray and Torrey's Peaks. Lake, Park, and Summit Counties, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01241 ID. Jackson, W.H. 1241 The Sawatch Range, from a point a little south of Weston's Pass. The elevation of the standpoint is 11,000 feet, or about 2,500 feet above the Arkansas River, just below. View looks south to Buffalo Peaks, a well-known landmark, occupying the extreme southern end of the Park Range. Chaffee and Park Counties, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01242 ID. Jackson, W.H. 1242 The Sawatch Range. View of the Arkansas Valley, extending southward as far as Poncho Pass. In the center is Mount Harvard, the highest in the Rocky Mountains. Chaffee and Park Counties, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01244 ID. Jackson, W.H. 1244 Maroon Mountain in the Elk Mountains, head of Rock Creek. Elevation of standpoint, 12,300 feet. The mountain is entirely of sedimentary rocks, with the exception of a few dikes, lying in well-defined strata of Carboniferous sandstones of a deep rich maroon color, dipping to the north. The long narrow ridge running up to the mountains separates the waters of Rock Creek from those of Roaring Fork. Elevation of Maroon Mountain, 14,000 feet. Gunnison County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01246 ID. Jackson, W.H. 1246 White Rock Mountain in the Elk Mountains, looking west from along spur or sharp dividing crest which separates two large amphitheaters, one on the right debouching into East River on the north, and the other via Teocalli Creek on the south. This mountain is a portion of the main granitic core, extending northward to the Snowmass, Capitol, and Sopris, and is so named from a mass of light-colored rock, disintegrating into sand that breaks out upon its summit. The height of White Rock is 13,847 feet. Gunnison County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01247 ID. Jackson, W.H. 1247 Teocalli Peak. Panoramic view from near White Rock Mountain, National Range. Teocalli, a pyramidal mountain, derives its name from the Aztec sacrificial pyramid or teocalli. Its upper portion is of beautifully-stratified sandstone, rising by steps and broken into many little sharp pinnacles and towers. It is best seen from the opposite side. Gunnison County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01248 ID. Jackson, W.H. 1248 The Mount of the Holy Cross. Eagle County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01249 ID. Jackson, W.H. 1249 Roches Moutonnees or sheep backed rocks, near the Mount of the Holy Cross. Eagle County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1872/jwh01250 ID. Jackson, W.H. 1250 Camp of the United States Geological Survey in the Wasatch Mountains near Ogden. Weber County, Utah. 1872. #1:/Jackson W.H. Collection-jack1878/jwh01251 ID. Jackson, W.H. 1251 Wind River Peak. Figure is A.D. Wilson. Fremont County, Wyoming. 1878. #1:/Jackson W.H. Collection-jack1878/jwh01252 ID. Jackson, W.H. 1252 Seneca Lake in Wind River Mountains. Fremont Peak. Fremont County, Wyoming. 1878. #1:/Yellowstone National Park/jwh01253 ID. Jackson, W.H. 1253 Yellowstone National Park, Wyoming. Heart Lake and Mount Sheridan. 1878. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1878/jwh01254 ID. Jackson, W.H. 1254 Lake in Wind River Mountains. Fremont County, Wyoming. 1878. #1:/Yellowstone National Park/jwh01256 ID. Jackson, W.H. 1256 Yellowstone National Park, Wyoming. Kepler Cascades on the Firehole River. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh01257 ID. Jackson, W.H. 1257 Yellowstone National Park, Wyoming. Meeting in Firehole Basin. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack18ny/jwh01260 ID. Jackson, W.H. 1260 Mt. Harvard and the valley of the Arkansas. Chaffee County, Colorado.n.d. #1:/Jackson W.H. Collection-jack18ny/jwh01261 ID. Jackson, W.H. 1261 The Highland Mary Mining Works. Cunningham Gulch, Bakers Park. San Juan County, Colorado.n.d. #1:/Jackson W.H. Collection-jack18ny/jwh01262 ID. Jackson, W.H. 1262 Uncompahgre Mountain. Hinsdale County, Colorado.n.d. #1:/Jackson W.H. Collection-jack18ny/jwh01263 ID. Jackson, W.H. 1263 Lake San Miguel. Colorado.n.d. #1:/Jackson W.H. Collection-jack18ny/jwh01264 ID. Jackson, W.H. 1264 Great memorial valley on the Arkansas at the mouth of the La Plata. Colorado.n.d. #1:/Jackson W.H. Collection-jack18ny/jwh01265 ID. Jackson, W.H. 1265 Gunnison's Butte, Green River.n.d. #1:/Jackson W.H. Collection-jack18ny/jwh01267 ID. Jackson, W.H. 1267 The Book Cliffs near Green River. Grand County, Utah.n.d. #1:/Yellowstone National Park/jwh01268 ID. Jackson, W.H. 1268 Yellowstone National Park, Wyoming. The Annie, first boat ever launched on Yellowstone Lake. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack18ny/jwh01271 ID. Jackson, W.H. 1271 Grays Peak from Argentine Pass. Clear Creek County, Wyoming.n.d. #1:/Jackson W.H. Collection-jack18ny/jwh01272 ID. Jackson, W.H. 1272 Georgetown. Clear Creek County, Colorado.n.d. #1:/Jackson W.H. Collection-jack18ny/jwh01273 ID. Jackson, W.H. 1273 Caribou. Boulder County, Colorado.n.d. #1:/Jackson W.H. Collection-jack18ny/jwh01276 ID. Jackson, W.H. 1276 Mount of the Holy Cross, Great National Range. Eagle County, Colorado. 1873? #1:/Jackson W.H. Collection-jack18ny/jwh01277 ID. Jackson, W.H. 1277 Poncho House. San Juan County, Utah.n.d. #1:/Jackson W.H. Collection-jack18ny/jwh01278 ID. Jackson, W.H. 1278 Castle Peak, a sandstone peak in the Elk Mountains. It is a bright rich red, distinctly banded by its stratification, and rising up in sharp blade-like crests to the summit. Its elevation is 14,106 feet. Pitkin County, Colorado.n.d. #1:/Jackson W.H. Collection-jack18ny/jwh01279 ID. Jackson, W.H. 1279 Lt. Colonel Eugene M. Baker and group of army officers at Fort Ellis, Montana Territory 1871. Mr.W.H. Jackson the veteran photographer who took this photograph writes in 1928, "We, the Geological Survey, were at Fort Ellis again from September 1st to 5th on our return. On the first one of these occasions, I made several scenic views about the neighborhood at the suggestion of and in company with some of the officers, this one among them. Although the photograph bears the imprint of the Department of the Interior, U.S. Geological Survey of the Territories, Washington, D.C., no. 197, the negative has been lost or destroyed, no record of it being now obtainable at the Geological Survey; and this old print now has special historical interest. "Left to right: Frank C. Grugan, 1st Lt. 2nd Cavalry; Lewis Thompson, Capt. 2nd Cavalry; George H. Wright, 2nd Lt., 7th Infantry; Gustavus C. Doane, 2nd Lt. 2nd Cavalry; Lewis Cass Forsyth, Capt., acting Quartermaster, A.B. Campbell, Asst. Surgeon; Dr.R.M. Whitewood Contract Physician; Sam T. Hamilton, 1st Lt. 2nd Cavalry; Col. Eugene M. Baker in command of post Dec. 1, 1869 - Oct. 15, 1872; Edward Ball, Capt. 2nd Cavalry; Lovell H. Jerome, 2nd Lt. 2nd Cavalry (rear); George L. Tyler, Capt. 2nd Cavalry; Edward J. McClerand, 2nd Lt. 2nd Cavalry; Charles B. Schofield, 2nd Lt., 2nd Cavalry. #1:/Jackson W.H. Collection-jack18ny/jwh01280 ID. Jackson, W.H. 1280 Georgetown. Clear Creek County, Colorado.n.d. #1:/Jackson W.H. Collection-jack1871/jwh01281 ID. Jackson, W.H. 1281 Ogden Canyon 3 miles above its mouth. A narrow gorge cut through the rocks, with walls 1,500 to 2,000 feet in height, the roadway being built up from the bed of the creek. In the center of the view, a cone-like mass of quartzites, most distinctly and beautifully stratified, stands up at an angle of 55 degrees and 100 feet high. A very interesting geological picture. Weber County, Utah. 1871. #1:/Jackson W.H. Collection-jack1870/jwh01282 ID. Jackson, W.H. 1282 Erosion forms in Monument Park. El Paso County, Colorado. 1870. #1:/Jackson W.H. Collection-jack1869/jwh01283 ID. Jackson, W.H. 1283 Devils Slide, Weber Canyon. Utah. 1869. #1:/Jackson W.H. Collection-jack1875/jwh01284 ID. Jackson, W.H. 1284 Towering smooth-faced wall of Wingate Sandstone along Chinle Wash and Comb Ridge. Alcoves, some containing cliff dwellings such as this one (Poncho House), are common at the base. San Juan County, Utah. 1875. Photo courtesy of Peabody Museum, Harvard University. Published as figure 8 in U.S. Geological Survey. Bulletin 1186. 1965. #1:/Jackson W.H. Collection-jack18ny/jwh01285 ID. Jackson, W.H. 1285 Long's Peak, a view from Estes Park on the northwest. Distance of about 12 miles from the summit. The park is about 4 by 6 miles in diameter, lying inside the foot-hill range and close under the main range. Long's Peak, as seen from the plains, in the most prominent in the front range, rising sharply high above the surrounding peaks. Its elevation is 14, 271 feet, and about 6,300 feet above the park. Boulder and Larimer Counties, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01288 ID. Jackson, W.H. 1288 Colorado City and Cheyenne Mountain. This is the portion which extends out to the edge of the plain, a bold promontory-like headland, known as Cheyenne Mountain, having an elevation of 4,000 feet above the plain. Along its north face, and extending behind it, are Cheyenne and Bear Canyons, extremely wild and rugged. In the middle distance, about 3 miles away, is the old town of Colorado City, built in 1859, during the first days of the "Pikes Peak" excitement. The town of Colorado Springs lies about 2 miles to the east, and Manitou, where the springs are, the same distance to the west. El Paso County, Colorado. 1873. #1:/Jackson W.H. Collection-jack18ny/jwh01289 ID. Jackson, W.H. 1289 Moraines on Clear Creek, valley of the Arkansas. Chaffee County, Colorado. n.d. #1:/Jackson W.H. Collection-jack1871/jwh01290 ID. Jackson, W.H. 1290 The odometer, made by attaching a pair of shafts to the fore wheels of an ambulance, to the spokes of which were attached the instruments that recorded their revolutions, and measured the surface of the country over which we passed. These were the first wheels that were ever taken into this little-known region. The Upper Geyser Basin - Yellowstone Series. 1871. #1:/Jackson W.H. Collection-jack1874/jwh01291 ID. Jackson, W.H. 1291 Writing letters.W.H. Holmes. Rocky Mountains of Colorado. 1874. #1:/Jackson W.H. Collection-jack1873/jwh01293 ID. Jackson, W.H. 1293 Eroded sandstones in Monument Park. Situated upon a small tributary of Monument Creek, about nine miles north of Colorado City. El Paso County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01295 ID. Jackson, W.H. 1295 Long's Peak from Prospect Mountain, Estes Park. Standing isolated on the southern edge of the park, about 1,000 feet in height, and affording a most excellent panoramic view. Boulder and Larimer Counties, Colorado. 1873. Photo similar to W.H. Jackson nos. 363 - 364. #1:/Jackson W.H. Collection-jack1873/jwh01297 ID. Jackson, W.H. 1297 Long's Peak. The peak occupies nearly the whole view, but is only the most easterly of the twin summits, the highest one being beyond and hidden by it. Boulder County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01298 ID. Jackson, W.H. 1298 The Snowy Range, west from Gold Hill. The large rounded summit of "Jim" Peak is most prominent. This lake has an elevation of 12,000 feet, and the average height of the range is some 2,000 feet above it. Boulder County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01299 ID. Jackson, W.H. 1299 James Peak from near North Boulder, a distance of about 20 miles. Grand and Boulder Counties, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01300 ID. Jackson, W.H. 1300 The Snowy Range from Gold Hill. Long's Peak is on the right, about 50 miles away. This lake has an elevation of 12,000 feet, and the average height of the range is some 2,000 feet above it. Boulder County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01302 ID. Jackson, W.H. 1302 Arapaho Peaks. Grand County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01303 ID. Jackson, W.H. 1303 The Castle Rock in Boulder Canyon. The canyon is about 17 miles in length, cutting deep down through the metamorphic rocks of the foothills, so that in some places the sides of the canyon rise up nearly 3,000 feet above its bed. Boulder County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01304 ID. Jackson, W.H. 1304 Caribou. A mining town of some 300 inhabitants, situated high up on the foothills, about the headwaters of the Middle Boulder. Its elevation is 9,167 feet, being very near the timberline. Boulder County, Colorado. 1873. Photo same as no. 1273. #1:/Jackson W.H. Collection-jack1873/jwh01306 ID. Jackson, W.H. 1306 James Peak and the range northward, showing a deep, snow-filled valley and numerous lakes. Leading up to the right is the trail from the South Boulder, over to Middle Park. This is known as James Pass. Grand and Clear Creek Counties, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01307 ID. Jackson, W.H. 1307 Arapaho Peak, due north, whose square-topped summit looms up in the distance far above the surrounding range; and from it the mountains sweep down in undulating lines to the foothills that appear almost as a rolling prairie. Grand and Clear Creek Counties, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01308 ID. Jackson, W.H. 1308 Frozen Lake, near foot of James Peak, the source of Fall River. One of thousands similar, scattered allover the mountain range; small basins filled with the waters from the melting snow, and remaining ice-locked until far into the summer. Clear Creek County, Colorado. 1873. Photo same as no. 1287. #1:/Jackson W.H. Collection-jack1873/jwh01309 ID. Jackson, W.H. 1309 Georgetown. A view from the summit of the trail leading from the valley below to Empire, at an elevationof about 1,000 feet above the creek. The town has a population of about 3,000 inhabitants. It lies on Clear Creek, about 50 miles from Denver, and at the head of the open valley-like canyon. Back of the town the stream forks, Leavenworth Mountain standing between, and passes up in rapidly ascending canyons to the very base of Gray's and Torrey's Peaks. Upon the left is Griffith Mountain, over which a very steepand sinuous trail leads to Idaho Springs and to Chicago Lake. The elevation of Georgetown is 8,412 feet. Clear Creek County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01310 ID. Jackson, W.H. 1310 Front range of the Rocky Mountains from near Gray's and Torrey's Peaks. The twin peaks, Gray and Torrey, named from the two collaborators in science who have done so much for their cause among these mountains. They are very nearly of equal height, Gray being 14,341 feet and Torrey 14,336. From Peak to Peak the distance is nearly a mile, and through this saddle is a "pass" from Georgetown to the mining towns on the Blue River. The trail runs up the long ridge toward Gray, and then turns to the right. Its course can be seen by looking sharply where the snowbanks cut across it. The combing crest of the snow at the summit frequently lies all summer, and it then becomes necessary to tunnel under it, so that the pack-animals may pass over. To the right of Torrey, away in the distance, across Middle Park, are the Blue River Mountains, their glittering snow-fields alone making them visible. Clear Creek and Summit Counties, Colorado. 1873. Photo similar to no. 1234) (Panorama with nos. 1311 - 1315) #1:/Jackson W.H. Collection-jack1873/jwh01311 ID. Jackson, W.H. 1311 Front range of the Rocky Mountains from near Gray's and Torrey's Peaks. This is a view of the wilderness of snow-streaked mountain summits. In the foreground, looking away down into the valley 2,000 feet below,is the mining region that once gave Bakerville a name and prominent place in the mining history of the west. Clear Creek County, Colorado. 1873. (Panorama with nos. 1310, 1312 - 1315). #1:/Jackson W.H. Collection-jack1873/jwh01312 ID. Jackson, W.H. 1312 Front range of the Rocky Mountains from near Gray's and Torrey's Peaks. This view is very nearly due north, looking down on the spur of Mount McClellan, and directly opposite from Gray's Peak. Beyond is James Peak, and the range about it. Along the horizon is Long's Peak, and the range running west from it, forming the boundary between North and Middle Parks. Clear Creek, Grand and Boulder Counties, Colorado. 1873. (Panorama with nos. 1310 - 1311, 1313 - 1315). #1:/Jackson W.H. Collection-jack1873/jwh01313 ID. Jackson, W.H. 1313 Front range of the Rocky Mountains from near Gray's and Torrey's Peaks. View to the east and to the twinpeaks, Evans and Rosalie, which lie almost directly between this point and Denver. They are detached from the main mountain range and stand out from it to the east, and are consequently the most prominent, as seen from Denver. Clear Creek, Park and Summit Counties, Colorado. 1873. Panorama with nos. 1310 -1312, 1314 - 1315) #1:/Jackson W.H. Collection-jack1873/jwh01314 ID. Jackson, W.H. 1314 Front range of the Rocky Mountains from near Gray's and Torrey's Peaks. In this view is a remarkable square-topped mountain, called Table Mountain. Between it and this point is Argentine Pass, over which a trail has been constructed into the valley of the blue, via Snake River. The summit of the pass is about 13,100 feet above the sea. Clear Creek and Summit Counties, Colorado. 1873. Photo same as no. 1235) (Panorama with nos. 1310 - 1313, 1315) #1:/Jackson W.H. Collection-jack1873/jwh01315 ID. Jackson, W.H. 1315 Front range of the Rocky Mountains from near Gray's and Torrey's Peaks. The high prominent point in thisview is the summit of Mount McClellan, and connects by a low saddle with Gray and Torrey. McClellan is but a little below Gray, being 13,423 feet high. Clear Creek and Summit Counties, Colorado. 1873. (Photo same as no. 1236) (Panorama with nos. 1310 - 1314) #1:/Jackson W.H. Collection-jack1873/jwh01316 ID. Jackson, W.H. 1316 Chicago Lake, Mount Evans. Lying at the foot of Mount Rosalie, the source of Chicago Creek, and the most picturesque mountain lake in Colorado. It is high upon the mountain, just at the verge of timberline, having an elevation of 11,995 feet, the summit of Rosalie, shown in the view, being 2,345 feet higher. Clear Creek and Park Counties, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01318 ID. Jackson, W.H. 1318 Gateway to Garden of the Gods, about 3 miles above Colorado City. Two vertical walls of red sandstone, 350 feet in height, the space between them being a perfect gateway. El Paso County, Colorado. 1873. (Photo same as no. 1224) #1:/Jackson W.H. Collection-jack1873/jwh01319 ID. Jackson, W.H. 1319 Montezuma's Cathedral. Cathedral spires, in the Garden of the Gods, just inside the gateway shown in photo 1318, Needlelike in the perfect symmetry. They are remnants of the same uplifted strata of red sandstone the formed the walls of the gateway. The tallest spire is about 200 feet in height. El Paso County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01321 ID. Jackson, W.H. 1321 View of Cameron's Cone as the prominent point. In the middle distance are some of the upturned strata, which form a portion of the Garden of the Gods. El Paso County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01322 ID. Jackson, W.H. 1322 Pikes Peak in the distance about 10 miles, as seen looking over the walls of the Garden of the Gods. Its elevation above the sea is 14,216 feet, and above Colorado City 7,824 feet. It is entirely detached from the main range, lying some 75 miles to the east of it. With its spurs, it forms the southeastern boundary of South Park. El Paso County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01323 ID. Jackson, W.H. 1323 This view was taken from the summit of Mount Lincoln. Looking south from Mount Lincoln is Mount Bross, long famous for its great wealth of silver-bearing rocks. The small buildings near the summit on the left cover the Moose Mine, richest on the mountain. Its whole face has been plowed and furrowed over by the prospector. Across its face two lines can be traced, the upper, a wagon road that has been constructed from the valley below to the very summit of Mount Lincoln, via the low saddle which separates the two mountains. The lower line is the old "trail" that was traveled by hardy little "jacks," laden with supplies for the miners going up, and with sacks of ore going down. To the extreme left is a portion of South Park, and in the distance on the right the continuation of the range along its axis to the Buffalo Peaks. Park County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01325 ID. Jackson, W.H. 1325 The Sawatch Range, looking west across the Arkansas to Twin Lakes, about 10 miles distant. Beyond them extends the valley or canyon of Lake Creek up to Red Mountain Pass, on the summit of the range. These lakes are the trough or bed of an old glacier that once filled the valley. On the right is an immense lateral moraine bounding the lake on that side, and on the other is another of less prominence. Upon either side are Elbert and La Plata Peaks, the two next in height to Harvard. Chaffee and Lake Counties, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01326 ID. Jackson, W.H. 1326 The Sawatch Range, looking nearly north to Tennessee Pass, at the extreme right, the Mount of the Holy Cross, and at the left Grand or Massive Mountains, whose height is 14,368 feet. Tennessee Pass is 10,418 feet above sea-level. Park, Lake and Eagle Counties, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01327 ID. Jackson, W.H. 1327 The Upper Twin Lake. Lake Creek rises in the heart of the Sawatch Range, near Red Mountain Pass, and flowing down a valley of wonderful glacial erosion, empties itself into the Upper Lake, then across a narrow neck which separates them into the Lower Lake. The former is about 1 1/2 miles long, and the lastis 3 miles in length, and occupy the trough or bed of an old glacier that once filled this valley. Lake County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01328 ID. Jackson, W.H. 1328 Mount Harvard. A view looking south on the Arkansas River, from a bluff 1,000 feet high, opposite the mouth of Clear Creek. Mount Harvard, lying in the range west of the Arkansas, and latitude 38 degrees 45 minutes, has an elevation of 14,384 feet, the highest in the Rocky Mountains within the limits of the United States. In the distance beyond are the spurs of Yale, its summit being obscured by a mass of clouds. At the base of Harvard is a splendid exhibition of enormous glacial action, in the great lateral moraines that sweep down to the bank of the river. Chaffee County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01329 ID. Jackson, W.H. 1329 Moraines on Clear Creek. A grand display of great glacial power. Upon either side of the creek are twolateral moraines a half mile apart, 3 miles in length, and averaging 500 feet in height. The granite walls of the canyon above are ground and polished. Ages past a glacier filled this canyon 500 to 800 feet in depth, and 20 miles in length, discharging itself into the valley of the Arkansas. Clear Creek County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01330 ID. Jackson, W.H. 1330 View over the summits of the Sawatch Range, from the top of La Plata, at an elevation of 14,302 feet. This view is a little west of south, along the axis of the range, over a great mass of mountain peaks. Chaffee County, Colorado. 1873. Photo similar to no. 392). (Panorama with nos. 1331 - 1334, 1341) #1:/Jackson W.H. Collection-jack1873/jwh01332 ID. Jackson, W.H. 1332 View over the summits of the Sawatch Range, from the top of La Plata, at an elevation of 14,302 feet. Another view of Mount Harvard, somewhat dimly, as it was obscured by a storm. On the left are the Buffalo Peaks, and a little to the right of them is Pikes Peak, nearly a 100 miles away. Chaffee, Park, Teller and El Paso Counties, Colorado. 1873. Panorama with nos. 1330 - 1331, 1333 - 1334, 1341. #1:/Jackson W.H. Collection-jack1873/jwh01333 ID. Jackson, W.H. 1333 View over the summits of the Sawatch Range, from the top of La Plata, at an elevation of 14,302 feet. Looking down across the mouth of Lake Creek Canyons, on the Arkansas, to the range about Mount Lincoln,in the distance. Chaffee, Lake and Park Counties, Colorado. 1873. (Panorama with nos. 1330 - 1332,1334, 1341) #1:/Jackson W.H. Collection-jack1873/jwh01334 ID. Jackson, W.H. 1334 View over the summits of the Sawatch Range, from the top of La Plata, at an elevation of 14,302 feet. View around to the north. Prominent on the right is Elbert's Peak, which is 14,324 feet high. Next to it in the distance, are the Grand and Holy Cross Mountains, and on the left the same wilderness of nameless peaks. Chaffee, Lake, and Eagle Counties, Colorado. 1873. (Panorama with nos. 1330 - 1333,1341) #1:/Jackson W.H. Collection-jack1873/jwh01335 ID. Jackson, W.H. 1335 Whitehouse Mountain and Elk Lake, Elk Mountains. Gunnison County, Colorado. 1873. Photo similar tono. 412. #1:/Jackson W.H. Collection-jack1873/jwh01337 ID. Jackson, W.H. 1337 Treasury Mountain, National Range. Gunnison County, Colorado. 1873. Photo same as no. 1245. #1:/Jackson W.H. Collection-jack1873/jwh01338 ID. Jackson, W.H. 1338 View south and west from the Whitehouse, National Range. Gunnison County, Colorado. 1873. Photo similar to no. 408. #1:/Jackson W.H. Collection-jack1873/jwh01339 ID. Jackson, W.H. 1339 View of some of the highest and most conspicuous of the singular sandstone peaks which surround the centerof the range. Chief among them is Castle Peak, from the weird towers, by which its central pyramid is flanked on either side. It is a bright, rich red, distinctly banded by its stratification, and rising up in sharp blade-like crests to the summit. Its elevation is 14,106 feet. This side of Castle Peak there are two lesser pyramids, very characteristic of the system. Away in extreme distance the broad summit of Grizzly and the sharp crest of La Plata are distinctly seen. Pitkin and Chaffee Counties, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01340 ID. Jackson, W.H. 1340 The Mount of the Holy Cross. The mountain itself, like the whole range to which it belongs, is of gneiss; the sedimentary beds cap some of its flanking hills, and abound over toward the Elk Mountains, as well as in the valley which lies this side of the Blue River Range, but they do not appear anywhere near the summit. It is not precisely in the main range, but rather constitutes a side branch, or spur striking off to the northwest, and is the most northern spur of the Sawatch Range. The height of the Mount is 14,176 feet. The perpendicular arm of the cross is 1,500 feet in length and fully 50 feet in breadth, the snow lying in the crevice from 50 to 60 feet in depth. The horizontal arm varies with the seasons in length, but averages 700 feet. Eagle County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01341 ID. Jackson, W.H. 1341 View over the summits of the Sawatch Range, from the top of La Plata, at an elevation of 14,302 feet. Red Mountain Pass. Beyond the pass a little way is Grizzly Mountain, so named from the number of bears seen about it, and away in the distance, to its right, are the Elk Mountains; the glistening white face of Snow Mass, with the Capitol and Sopris still farther to the right, being distinguishable. Chaffee and Pitkin Counties, Colorado. 1873. Photo similar to no. 397. (Panorama with nos. 1330 - 1334) #1:/Jackson W.H. Collection-jack1873/jwh01342 ID. Jackson, W.H. 1342 Castle Rock, in Boulder Canyon. Five miles below Middle Boulder, near the head of the canyon. It is a solid mass of granite, standing out detached from the walls of the canyon, the granite, standing out detached from the walls of the canyon, the river describing a half circle about it, sweeping close to its base. It is conical in form, rising to a height of about 250 feet, and is often call Hay-Stack Rock. Boulder County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01343 ID. Jackson, W.H. 1343 Rendezvous camp, on Clear Creek, four miles northwest from Denver, a delightful spot, in the midst of a grove of cottonwoods, with great wide-spreading arms, resembling the eastern elm. The view is made in early spring, before the trees put forth their leaves. In this camp the members of the Survey collected to organize and equip for the season's campaign. Jefferson County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01344 ID. Jackson, W.H. 1344 Rendezvous camp, on Clear Creek, four miles northwest from Denver, a delightful spot, in the midst of a grove of cottonwoods, with great wide-spreading arms, resembling the eastern elm. The view is made inearly spring, before the trees put forth their leaves. In this camp the members of the Survey collected to organize and equip for the season's campaign. Jefferson County, Colorado. 1873. Photo same as no.360 #1:/Rocky Mountain National Park/jwh01347 ID. Jackson, W.H. 1347 Rocky Mountain National Park, Colorado. Longs Peak, viewed from the lower end of Estes Park. 1873.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1873/jwh01358 ID. Jackson, W.H. 1358 Head of Mosquito Gulch, lying next south to Buckskin Gulch, from a high point looking down into the amphitheater, and up to the crest of the divide which separates the waters of the Platte and the Arkansas Rivers. To the left of the mountain butte, in the center, is Mosquito Pass, a trail only, leading overto Oro City and California Gulch. The elevation of the summit of the pass is 12,200 feet. Park County, Colorado. 1873. Photo same as no. 376). #1:/Jackson W.H. Collection-jack1873/jwh01359 ID. Jackson, W.H. 1359 Mount Byers, head of Sacramento Gulch, lying next south of Mosquito. From the same standpoint as photo no. 376. Prominent in the view are the long slopes of quartzites which break down suddenly and leave the great basin or amphitheater between it and the granites of the main range. Park County, Colorado. 1873. (Photo same as no. 377) #1:/Jackson W.H. Collection-jack1873/jwh01360 ID. Jackson, W.H. 1360 Horseshoe Mountain, southeast from Fairplay about ten miles, and in the same range with the preceding photos. An amphitheater in an uplifted limestone strata, resembling very much the impression left by ahorse's foot, upon a gigantic scale, in the side of the mountain. The floor of the amphitheater is composed of granite, the quartzites and limestones resting upon it. There are some very rich silver mines about the mountain, lying in the stratified rocks high up on the mountain elevation. Park County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01363 ID. Jackson, W.H. 1363 View of the Arkansas River, between Clear Creek and the Twin Lakes, where the stream is narrowed down to a foaming cascade or fall, and flanked by great towering walls of granite. Chaffee County, Colorado. 1873. Photo same as no. 381. #1:/Jackson W.H. Collection-jack1873/jwh01364 ID. Jackson, W.H. 1364 The Twin Lake, a distant view, as seen from an elevation of 800 feet above them, on one of the spurs of Mount Elbert. Lake County, Colorado. 1873. Photo same as no. 383. #1:/Jackson W.H. Collection-jack1873/jwh01371 ID. Jackson, W.H. 1371 A granite buttress 500 feet in height, standing out midway in Lake Creek Valley, the upper face of which has been rounded off and polished by glacial action. Lake County, Colorado. 1873. Photo same as no. 390. #1:/Jackson W.H. Collection-jack1873/jwh01375 ID. Jackson, W.H. 1375 Panorama from the summit of La Plata Mountain. Chaffee County, Colorado. 1873. Panorama with photonos. 1372 - 1374, 1376. Photo same as no. 396. #1:/Jackson W.H. Collection-jack1873/jwh01380 ID. Jackson, W.H. 1380 Gothic Mountain, East River, picturesque mountain form, as well as a most instructive geological picture. The bast of the mountain is Cretaceous; then comes a broad, deep band of eruptive rock, covered with the Cretaceous, which is again surmounted with the volcanic material forming its summit. Elevation 12,498 feet. Gunnison County, Colorado. 1873. (Photo same as no. 403) #1:/Jackson Collection/jwh01387 ID. Jackson, W.H. 1387 View south across East River Pass, Elk Mountains. Gunnison County, Colorado. 1873. (Photo same as no.410) #1:/Jackson W.H. Collection-jack1873/jwh01388 ID. Jackson, W.H. 1388 White House Mountain and Elk Lake, Elk Mountains. Gunnison County, Colorado. 1873. Photo same as no.412. #1:/Jackson W.H. Collection-jack1873/jwh01389 ID. Jackson, W.H. 1389 Elk Lake, shadow view. Gunnison County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01391 ID. Jackson, W.H. 1391 White House Mountain from the south. Gunnison County, Colorado. 1873. (Photo same as no. 415) #1:/Jackson W.H. Collection-jack1873/jwh01394 ID. Jackson, W.H. 1394 Cascades on Rock Creek, a few rods above Jackson, W.H. 1393. Gunnison County, Colorado. 1873. Photo similar as no. 418. #1:/Jackson W.H. Collection-jack1873/jwh01397 ID. Jackson, W.H. 1397 Arkansas Valley, looking south, showing Mount Elbert on the right, then La Plata and Harvard. Lake and Chaffee Counties, Colorado. 1873. Photo similar to no. 421. #1:/Jackson W.H. Collection-jack1873/jwh01399 ID. Jackson, W.H. 1399 Roches' Moutonnees', near foot of the Mount of the Holy Cross, looking up the valley. Eagle County, Colorado. 1873. Photo similar to no. 423. #1:/Jackson W.H. Collection-jack1873/jwh01401 ID. Jackson, W.H. 1401 Distant view of the Mount of the Holy Cross and Roche Moutonnee Valley. Eagle County, Colorado. 1873. (Photo similar to no. 426) #1:/Jackson W.H. Collection-jack1873/jwh01402 ID. Jackson, W.H. 1402 Mount of the Holy Cross. Eagle County, Colorado. 1873. (Photo similar to no. 527) #1:/Jackson W.H. Collection-jack1873/jwh01403 ID. Jackson, W.H. 1403 Panorama from near the Mount of the Holy Cross. Eagle County, Colorado. 1873. Panorama with photo nos. 1404 - 1405. (Photo similar to no. 427) #1:/Jackson W.H. Collection-jack1873/jwh01404 ID. Jackson, W.H. 1404 Panorama from near the Mount of the Holy Cross. Eagle County, Colorado. 1873. Panorama with photo nos. 1403, 1405 - 1406. (Photo similar to no. 428) #1:/Jackson W.H. Collection-jack1873/jwh01405 ID. Jackson, W.H. 1405 Panorama from near the Mount of the Holy Cross. Eagle County, Colorado. 1873. Panorama with photo nos. 1403 - 1404, 1406. (Photo similar to no. 429) #1:/Jackson W.H. Collection-jack1873/jwh01406 ID. Jackson, W.H. 1406 Panorama from near the Mount of the Holy Cross. Eagle County, Colorado. 1873. Panorama with photo nos. 1403 - 1405. (Photo similar to no. 431) #1:/Rocky Mountain National Park/jwh01407 ID. Jackson, W.H. 1407 Rocky Mountain National Park, Colorado. Longs Peak, viewed from Estes Park. 1873.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1873/jwh01408 ID. Jackson, W.H. 1408 Long's Peak from Estes Park. Rocky Mountain National Park. Boulder and Larimer Counties, Colorado. 1873. (Similar to Jackson, W.H. 998) #1:/Jackson W.H. Collection-jack1873/jwh01409 ID. Jackson, W.H. 1409 Estes Park. Larimer County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01410 ID. Jackson, W.H. 1410 Estes Park. Larimer County, Colorado. 1873. #1:/Rocky Mountain National Park/jwh01411 ID. Jackson, W.H. 1411 Rocky Mountain National Park, Colorado. Longs Peak, viewed from Prospect Mountain. 1873.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Rocky Mountain National Park/jwh01413 ID. Jackson, W.H. 1413 Rocky Mountain National Park, Colorado. Longs Peak, viewed from near the head of the Little Thompson River. 1873.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1873/jwh01414 ID. Jackson, W.H. 1414 Long's Peak from southeastern base, head of the Saint Vrain. Boulder County, Colorado. 1873. (Similar to Jackson, W.H. 1000) #1:/Jackson W.H. Collection-jack1873/jwh01415 ID. Jackson, W.H. 1415 The Colorado or Front Range from Bald Mountain near Gold Hill. Boulder County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01418 ID. Jackson, W.H. 1418 View in Boulder Canyon, near Castle Rock. Boulder County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01419 ID. Jackson, W.H. 1419 View in Boulder Canyon, near Castle Rock. Boulder County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01420 ID. Jackson, W.H. 1420 Roadway under Castle Rock. Boulder County, Colorado. 1873. (Similar to Jackson, W. H. 1003) #1:/Jackson W.H. Collection-jack1873/jwh01421 ID. Jackson, W.H. 1421 Boulder Canyon, looking up from Castle Rock. Boulder County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01422 ID. Jackson, W.H. 1422 In the snow. Colorado. June 15, 1873. #1:/Jackson W.H. Collection-jack1873/jwh01423 ID. Jackson, W.H. 1423 In the snow. View shows man and 3 horses in the snow. Colorado. June 15, 1873. #1:/Jackson W.H. Collection-jack1873/jwh01424 ID. Jackson, W.H. 1424 Georgetown, Colorado; view from trail leading to Empire. Clear Creek County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01425 ID. Jackson, W.H. 1425 View down Clear Creek, from Empire trail. Clear Creek County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01426 ID. Jackson, W.H. 1426 View looking down Georgetown and Empire trail. Clear Creek County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01427 ID. Jackson, W.H. 1427 Gray's Peak. Summit County, Colorado. 1873. (Similar to Jackson, W. H. 1004) #1:/Jackson W.H. Collection-jack1873/jwh01428 ID. Jackson, W.H. 1428 Torrey's Peak. Clear Creek County, Colorado. 1873. #1:/Jackson Collection/jwh01429 ID. Jackson, W.H. 1429 Looking down Clear Creek from near Gray's Peak. Clear Creek County, Colorado. 1873. (Similar to photono. 1172) #1:/Jackson W.H. Collection-jack1873/jwh01430 ID. Jackson, W.H. 1430 Mounts Rosalie and Evans, from near Gray's Peak. Clear Creek County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01431 ID. Jackson, W.H. 1431 James Peak. Clear Creek County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01432 ID. Jackson, W.H. 1432 Parry's Peak. Clear Creek County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01433 ID. Jackson, W.H. 1433 Frozen lake near James Peak. Clear Creek County, Colorado. June 15, 1873. (Similar to Jackson, W.H. 1005) #1:/Jackson W.H. Collection-jack1873/jwh01434 ID. Jackson, W.H. 1434 Frozen lake near James Peak. Clear Creek County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01435 ID. Jackson, W.H. 1435 Chicago Lakes, Mount Rosalie. Clear Creek County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01436 ID. Jackson, W.H. 1436 Chicago Lakes, Mount Rosalie. Clear Creek County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01437 ID. Jackson, W.H. 1437 Chicago Lakes, Mount Rosalie. Clear Creek County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01438 ID. Jackson, W.H. 1438 Chicago Lakes, Mount Rosalie. Clear Creek County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01441 ID. Jackson, W.H. 1441 Chicago Lakes, Mount Rosalie. Clear Creek County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01443 ID. Jackson, W.H. 1443 Eroded sandstones of Monument Park, near Colorado City. El Paso County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01444 ID. Jackson, W.H. 1444 Eroded sandstones of Monument Park, near Colorado City. El Paso County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01447 ID. Jackson, W.H. 1447 Gateway of the Garden of the Gods, near Pikes Peak. El Paso County, Colorado. 1873. (Similar to photo no. 1012) #1:/Jackson W.H. Collection-jack1873/jwh01451 ID. Jackson, W.H. 1451 Pikes Peak from the Garden of the Gods. El Paso County, Colorado. 1873. (Similar to Jackson, W.H. 1016) #1:/Jackson W.H. Collection-jack1873/jwh01452 ID. Jackson, W.H. 1452 Ute Pass, from Colorado Springs to South Park. El Paso County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01458 ID. Jackson, W.H. 1458 Head of Mosquito Gulch. Park County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01460 ID. Jackson, W.H. 1460 Horseshoe Mountain from above. Park County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01461 ID. Jackson, W.H. 1461 Oro City and California Gulch. Lake County, Colorado. 1873. (Similar to Jackson, W.H. 1275) #1:/Jackson W.H. Collection-jack1873/jwh01464 ID. Jackson, W.H. 1464 Cascades in the canyon of La Plata Creek. Chaffee County, Colorado. 1873. (Similar to Jackson, W.H. 1027) #1:/Jackson W.H. Collection-jack1873/jwh01466 ID. Jackson, W.H. 1466 Upper Twin Lake, near view. Lake County, Colorado. 1873. (Similar to Jackson, W.H. 1029) #1:/Jackson W.H. Collection-jack1873/jwh01467 ID. Jackson, W.H. 1467 Lower Twin Lake, distant view. Lake County, Colorado. 1873. (Similar to Jackson, W.H. 1031) #1:/Jackson W.H. Collection-jack1873/jwh01468 ID. Jackson, W.H. 1468 Upper Twin Lake, distant view. Lake County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01470 ID. Jackson, W.H. 1470 Natural bridge over Lake Creek, near the falls, and three miles above Upper Twin Lake. Lake County, Colorado. 1873. #1:/Jackson Collection/jwh01471 ID. Jackson, W.H. 1471 Teocalli, Elk Mountains. Gunnison County, Colorado. 1873. (Similar to Jackson, W.H. 1034) #1:/Jackson W.H. Collection-jack1873/jwh01475 ID. Jackson, W.H. 1475 Snowmass Mountain from the south. Pitkin County, Colorado. 1873. (Similar to Jackson, W.H. 1039) #1:/Jackson W.H. Collection-jack1873/jwh01476 ID. Jackson, W.H. 1476 Snowmass Mountain from the south. Pitkin County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01479 ID. Jackson, W.H. 1479 Lower Falls on the Right Fork of Rock Creek, Elk Mountains. Gunnison County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01480 ID. Jackson, W.H. 1480 Lower Falls on the Right Fork of Rock Creek, Elk Mountains. Gunnison County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1873/jwh01485 ID. Jackson, W.H. 1485 The Mount of the Holy Cross. Eagle County, Colorado. 1873. #1:/Jackson W.H. Collection-jack1872/jwh01487 ID. Jackson, W.H. 1487 Views in Colorado Territory. Chiann Canyon. El Paso County, Colorado. 1872. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1872/jwh01488 ID. Jackson, W.H. 1488 Badlands near old Ft. Casper. Natron County, Wyoming. 1870. (Stereoscopic view similar to photo 863) #1:/Jackson W.H. Collection-jack1870/jwh01489 ID. Jackson, W.H. 1489 Views in the Rocky Mountains. Bad Lands on Black Fork. Wyoming. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh01490 ID. Jackson, W.H. 1490 Picturesque views of Rocky Mountain scenery. Box Elder Canyon affords a good section through the main ridge, being a much more regular gorge than the canyon of the La Prele. It is from 600 to 800 feet in depth, entirely of erosion, and so narrow that it is difficult to pass through it on foot, the side walls being perpendicular and sometimes overhanging. The predominating rocks are calcareous sandstones and some layers of quite fine limestones, with a great variety of texture. Converse County, Wyoming. 1870. (Stereoscopic view similar to Jackson, W.H. 271) #1:/Jackson W.H. Collection-jack1870/jwh01491 ID. Jackson, W.H. 1491 Box Elder Canyon, near Fort Fetterman, southeast of Glenrock. Converse County, Wyoming. 1870. (Stereoscopic view similar to Jackson, W. H. 862) #1:/Jackson W.H. Collection-jack1870/jwh01492 ID. Jackson, W.H. 1492 Picturesque view of Rocky Mountain scenery. View from Caspar Mountain. Wyoming. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh01493 ID. Jackson, W.H. 1493 Picturesque views of Rocky Mountain scenery. Bad Lands near Fort Bridger. Utah. 1870 (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh01494 ID. Jackson, W.H. 1494 Picturesque views of Rocky Mountain scenery. Bad Lands near Fort Bridger. Utah. 1870 (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh01495 ID. Jackson, W.H. 1495 Picturesque view of Rocky Mountain scenery. Devil's Gate. Wyoming. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh01496 ID. Jackson, W.H. 1496 Picturesque view of Rocky Mountain scenery. Devil's Gate. Wyoming. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh01497 ID. Jackson, W.H. 1497 Picturesque view of Rocky Mountain scenery. Camp of the U.S. Geological Survey of the Territories, Uinta Mountains. Utah. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh01498 ID. Jackson, W.H. 1498 Picturesque views of Rocky Mountain scenery. Camp of the U.S. Geological Survey of the Territories, Uninta Mountains. Utah. September 16, 1870. Amount the pines of the foothills in the Uinta Mountains, Elevation of nearly 10,000 ft. above sea level. #1:/Jackson W.H. Collection-jack1870/jwh01499 ID. Jackson, W.H. 1499 Picturesque views of Rocky Mountain scenery. Head of Black Fork, Uinta Mountains. Utah. 1870 (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh01500 ID. Jackson, W.H. 1500 The Great West. Beaver dams on Henry's Fork. This stream was at one time thickly inhabited by beavers,but they have been nearly driven out by the advance of civilization. There are many left, however, insome of the quiet, secluded nooks, and in such a place we found the subject which affords us so excellent an illustration of their habits. They have here constructed a dam across the channel of the fork, about 50 yards in length and from 3 to 5 feet in height. Daggett County, Utah. 1870. (Stereoscopic view similar to Jackson, W.H. 328) #1:/Jackson W.H. Collection-jack1870/jwh01501 ID. Jackson, W.H. 1501 Views in the Rocky Mountains. Beaver dams on Henry's Fork. Utah. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh01502 ID. Jackson, W.H. 1502 The Great West. Beavers' work incutting down trees on Henry's Fork of Green River. Utah. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh01503 ID. Jackson, W.H. 1503 Camp near the mouth of Henry's Fork of Green River. Having as a background a portion of the hogbacks which rise ridge by ridge to the distant summits of the quartzite nucleus of the Unitas. Draggett Country, Utah. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh01504 ID. Jackson, W.H. 1504 Picturesque views of Rocky Mountain scenery. A natural cave near Green River, in an upheaved ridge of limestone. It is full of holes and crevices, that give shelter to multitudes of bats and animals. This cave has also been a favorite resort for Indians, as is shown by traces of fires, the walls of stone laid up for defense, and the chipped flint and arrowheads scattered about. Daggett County, Utah. 1870. (Stereoscopic view similar to Jackson, W. H. 330) #1:/Jackson W.H. Collection-jack1870/jwh01505 ID. Jackson, W.H. 1505 Picturesque views of Rocky Mountain scenery. Soda Springs on the Fountaine qui Bouille, 3 miles above Colorado City. El Paso County, Colorado. 1870. (Stereoscopic view similar to photo nos. 619, 888) #1:/Jackson W.H. Collection-jack1870/jwh01506 ID. Jackson, W.H. 1506 Picturesque view of Rocky Mountain scenery. Ute Falls above Manitou. El Paso County, Colorado. 1870. (Stereoscopic view similar to Jachson, W.H. 889) #1:/Jackson W.H. Collection-jack1870/jwh01507 ID. Jackson, W.H. 1507 Picturesque views of Rocky Mountain scenery. Curiously eroded sandstone in Monument Park. El Paso County, Colorado. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh01508 ID. Jackson, W.H. 1508 The Great West. Beaver. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh01509 ID. Jackson, W.H. 1509 Ogden Canyon 3 miles above its mouth. A narrow gorge cut through the rocks, with walls 1,500 to 2,000 feet in height, the roadway being built up from the bed of the creek. In the center of the view, a cone-like mass of quartzites, most distinctly and beautifully stratified, stands up at an angle of 55 degrees and 100 feet high. A very interesting geological picture. Weber County, Utah. 1871. (Stereoscopic view similar to 1281) #1:/Jackson W.H. Collection-jack1871/jwh01510 ID. Jackson, W.H. 1510 The Great West. Portneuf Canyon. Bannock County, Idaho. 1871. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1871/jwh01511 ID. Jackson, W.H. 1511 The Great West. Snake River, Taylor's Bridge. Power County, Idaho. 1871. (Stereoscopic view) #1:/Yellowstone National Park/jwh01513 ID. Jackson, W.H. 1513 Yellowstone National Park, Wyoming. Hot springs on the Gardner River in the lower basins. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh01514 ID. Jackson, W.H. 1514 Yellowstone National Park, Wyoming. Hot springs on the Gardner River in the lower basins. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh01515 ID. Jackson, W.H. 1515 Yellowstone National Park, Wyoming. Basins of hot springs on the Gardner River. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh01516 ID. Jackson, W.H. 1516 Yellowstone National Park, Wyoming. Hot springs on the Gardner River in the upper basins. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Jackson W.H. Collection-jack1871/jwh01517 ID. Jackson, W.H. 1517 Scenery of the Yellowstone. Hot springs on Gardiner River, extinct cone now called the Liberty Cap. Yellowstone National Park. Wyoming. 1871. (Stereoscopic view similar to Jachson, W.H. 924) #1:/Yellowstone National Park/jwh01518 ID. Jackson, W.H. 1518 Yellowstone National Park, Wyoming. Tower Falls on Tower Creek, a small tributary of the Yellowstone River, 15 miles below the falls and about 500 yards above the junction of the streams. The falls are 132 feet high. 1871. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh01519 ID. Jackson, W.H. 1519 Yellowstone National Park, Wyoming. Lower Falls of the Yellowstone River. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh01520 ID. Jackson, W.H. 1520 Yellowstone National Park, Wyoming. Lower Falls of the Yellowstone River, 397 feet. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh01521 ID. Jackson, W.H. 1521 Yellowstone National Park, Wyoming. Upper Falls of the Yellowstone River, viewed from the east side. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh01522 ID. Jackson, W.H. 1522 Yellowstone National Park, Wyoming. Upper Falls of the Yellowstone River. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh01523 ID. Jackson, W.H. 1523 Yellowstone National Park, Wyoming. Upper Falls of the Yellowstone River. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh01524 ID. Jackson, W.H. 1524 Yellowstone National Park, Wyoming. Upper Falls of the Yellowstone River. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh01525 ID. Jackson, W.H. 1525 Yellowstone National Park, Wyoming. Grand Canyon of the Yellowstone. 1871. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh01526 ID. Jackson, W.H. 1526 Yellowstone National Park, Wyoming. Grand Canyon of the Yellowstone. 1871. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh01527 ID. Jackson, W.H. 1527 Yellowstone National Park, Wyoming. Grand Canyon of the Yellowstone, viewed from the east side. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh01528 ID. Jackson, W.H. 1528 Yellowstone National Park, Wyoming. Grand Canyon of the Yellowstone, viewed from the east side. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh01529 ID. Jackson, W.H. 1529 Yellowstone National Park, Wyoming. Grand Canyon of the Yellowstone, viewed from the east side. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh01531 ID. Jackson, W.H. 1531 Yellowstone National Park, Wyoming. Crystal Falls on Cascade Creek. 1871. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh01532 ID. Jackson, W.H. 1532 Yellowstone National Park, Wyoming. Rapids above the Upper Falls. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh01533 ID. Jackson, W.H. 1533 Yellowstone National Park, Wyoming. Rapids above the Upper Falls. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh01534 ID. Jackson, W.H. 1534 Yellowstone National Park, Wyoming. Mary Bay on Yellowstone Lake. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh01535 ID. Jackson, W.H. 1535 Yellowstone National Park, Wyoming. Giant Geyser in Upper Geyser Basin. 1871. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh01536 ID. Jackson, W.H. 1536 Yellowstone National Park, Wyoming. Grotto Geyser in Upper Geyser Basin. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh01537 ID. Jackson, W.H. 1537 Yellowstone National Park, Wyoming. Camp by a lake in the woods. 1871. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Jackson W.H. Collection-jack1871/jwh01538 ID. Jackson, W.H. 1538 Scenery of the Yellowstone. Elk. Wyoming. 1871. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1872/jwh01539 ID. Jackson, W.H. 1539 Stereo. studies among the Rocky Mountains. Little Cottonwood Canyon. Salt Lake County, Utah. 1872. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1872/jwh01540 ID. Jackson, W.H. 1540 Granite Peak, Little Cottonwood Canyon. Salt Lake County, Utah. 1872. (Stereoscopic view similar to photos 930, 931) #1:/Jackson W.H. Collection-jack1872/jwh01541 ID. Jackson, W.H. 1541 Views in Utah, Idaho and Montana. Willard Canyon, ten miles north of Ogden. Box Elder County, Utah. 1872. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1872/jwh01542 ID. Jackson, W.H. 1542 Stereo. studies among the Great Tetons of Snake River. View near Mount Hayden. Teton County, Wyoming. 1872. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1872/jwh01543 ID. Jackson, W.H. 1543 Stereo studies among the Great Tetons of Snake River. Teton Range, south. Teton County, Wyoming. 1872. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1872/jwh01544 ID. Jackson, W.H. 1544 Stereo. studies among the Great Tetons of Snake River. Teton Range, northeast. Teton County, Wyoming. 1872. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1872/jwh01545 ID. Jackson, W.H. 1545 Stereo studies among the Great Tetons of Snake River. Teton Range, northwest. Teton County, Wyoming. 1872. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1872/jwh01546 ID. Jackson, W.H. 1546 Stereo studies among the Great Tetons of Snake River. Teton Range, west. Teton County, Wyoming. 1872. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1872/jwh01547 ID. Jackson, W.H. 1547 Stereo studies among the Great Tetons of Snake River. Teton Range, west. Teton County, Wyoming. 1872. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1872/jwh01548 ID. Jackson, W.H. 1548 Stereo studies among the Great Tetons of Snake River. Teton Range south. Teton County, Wyoming. 1872. (Stereoscopic view) #1:/Grand Teton National Park/jwh01549 ID. Jackson, W.H. 1549 Grand Teton National Park, Wyoming. The Great Tetons of the Snake River. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Jackson W.H. Collection-jack1872/jwh01551 ID. Jackson, W.H. 1551 Stereo studies among the Great Tetons of Snake River. Left fork of Teton River. Teton County, Wyoming. 1872. (Stereoscopic view similar to photo nos. 943 and 944) #1:/Jackson W.H. Collection-jack1872/jwh01552 ID. Jackson, W.H. 1552 Stereo studies among the Great Tetons of Snake River. Right Fork of the Teton River. Teton County, Wyoming. 1872. (Stereoscopic views) #1:/Jackson W.H. Collection-jack1872/jwh01553 ID. Jackson, W.H. 1553 Stereo studies among the Great Tetons of Snake River. Right Fork of the Teton River. Teton County, Wyoming. 1872. (Stereoscopic views) #1:/Jackson W.H. Collection-jack1872/jwh01554 ID. Jackson, W.H. 1554 Out West. View on the Teton River. Teton County, Wyoming. 1872. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1872/jwh01555 ID. Jackson, W.H. 1555 Stereo studies among the Great Tetons of Snake River. Right Fork of Teton River. Teton County, Wyoming. 1872. (Stereoscopic views) #1:/Jackson W.H. Collection-jack1872/jwh01556 ID. Jackson, W.H. 1556 Stereo studies among the Great Tetons of Snake River. Right Fork of Teton River. Teton County, Wyoming. 1872. (Stereoscopic views) #1:/Jackson W.H. Collection-jack1872/jwh01557 ID. Jackson, W.H. 1557 Stereo studies among the Great Tetons of Snake River. Right Fork of Teton River. Teton County, Wyoming. 1872. (Stereoscopic views) #1:/Jackson W.H. Collection-jack1872/jwh01558 ID. Jackson, W.H. 1558 Stereo studies among the Great Tetons of Snake River. Right Fork of Teton River. Teton County, Wyoming. 1872. (Stereoscopic views) #1:/Jackson W.H. Collection-jack1872/jwh01559 ID. Jackson, W.H. 1559 Stereo studies among the Great Tetons of Snake River. Right Fork of Teton River. Teton County, Wyoming. 1872. (Stereoscopic views) #1:/Jackson W.H. Collection-jack1872/jwh0155a ID. Jackson, W.H. 155a Portneuf Canyon, looking down from the great bend, about midway in the canyon. Canyon illustrates the immense basaltic overflow, filling the valley as level as a floor, contrasting finely with the bold mountain outlines upon either side. The creek cuts closely up to the beds, exposing an upright wall of columnar basalt for a number of miles. Bannock County, Idaho. 1872. #1:/Jackson W.H. Collection-jack1872/jwh01560 ID. Jackson, W.H. 1560 Stereo studies among the Great Tetons of Snake River. Right Fork of Teton River. Teton County, Wyoming. 1872. (Stereoscopic views) #1:/Jackson W.H. Collection-jack1872/jwh01561 ID. Jackson, W.H. 1561 Stereo studies among the Great Tetons of Snake River. Right Fork of Teton River. Teton County, Wyoming. 1872. (Stereoscopic views) #1:/Jackson W.H. Collection-jack1872/jwh01563 ID. Jackson, W.H. 1563 Stereo studies among the Rocky Mountains. Henry's Lake, from a point on the east side. Fremont County, Idaho. 1872. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1872/jwh01564 ID. Jackson, W.H. 1564 Sawtell's ranch, at the northern end of Henry's Lake. Messrs. Sawtell and Wurtz, the pioneers of this region, have built themselves very comfortable quarters by the side of a very fine, large spring. They catch large quantities of fish from the lake, for which they find a ready market in Virginia City and the mining towns. Large game of all kinds is abundant. Fremont county, Idaho. 1872. (Stereoscopic view similar to photo 180) #1:/Yellowstone National Park/jwh01565 ID. Jackson, W.H. 1565 Yellowstone National Park, Wyoming. Mud puffs in Lower Geyser Basin. 1872. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh01567 ID. Jackson, W.H. 1567 Yellowstone National Park, Wyoming. Crater of Fountain Geyser in Lower Geyser Basin. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh01569 ID. Jackson, W.H. 1569 Yellowstone National Park, Wyoming. Steam jet. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh01571 ID. Jackson, W.H. 1571 Yellowstone National Park, Wyoming. Upper Geyser Basin, looking up. 1872. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh01572 ID. Jackson, W.H. 1572 Yellowstone National Park, Wyoming. Old Faithful in Upper Geyser Basin in eruption. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh01573 ID. Jackson, W.H. 1573 Yellowstone National Park, Wyoming. Old Faithful in Upper Geyser Basin in eruption. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh01575 ID. Jackson, W.H. 1575 Yellowstone National Park, Wyoming. Crater of Beehive Geyser in Upper Geyser Basin. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. See also photo jwh00189. #1:/Jackson W.H. Collection-jack1872/jwh01576 ID. Jackson, W.H. 1576 Yellowstone National Park, Hot Springs and Geysers. Crater of the Giantess Geyser. It has a large, deep orifice, 20 by 25 feet in diameter, and when empty showing a depth of 80 feet. This view represents it nearly full, just previous to an eruption. In 1870 its eruptions were recorded by Langford as being over 200 feet in height. Yellowstone National Park. Wyoming. 1872. (Stereoscopic view similar to photo no. 190) #1:/Jackson W.H. Collection-jack1872/jwh01577 ID. Jackson, W.H. 1577 Yellowstone National Park, Hot Springs and Geysers. Crater of the Grand Geyser. Nearly opposite the Castle and so named from the great force and power it displays in its eruptions, varying from 150 to 250 feet in height. For a space of 10 feet about the crater the surface is elegantly adorned with beautifully scalloped little reservoirs, filled with the clear, transparent waters from the geyser. Yellowstone National Park. Wyoming. 1872. (Stereoscopic view similar to no. 191) #1:/Yellowstone National Park/jwh01581 ID. Jackson, W.H. 1581 Yellowstone National Park, Wyoming. Castle Geyser in Upper Geyser Basin in eruption. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh01584 ID. Jackson, W.H. 1584 Yellowstone National Park, Wyoming. Hot Springs pools of the upper Fire Hole basin. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. 1872. #1:/Yellowstone National Park/jwh01585 ID. Jackson, W.H. 1585 Yellowstone National Park, Wyoming. Hot Springs pools of the upper Fire Hole basin. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. 1872. #1:/Yellowstone National Park/jwh01588 ID. Jackson, W.H. 1588 Yellowstone National Park, Wyoming. Mammoth Hot Springs. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh01589 ID. Jackson, W.H. 1589 Yellowstone National Park, Wyoming. Mammoth Hot Springs. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh01590 ID. Jackson, W.H. 1590 Yellowstone National Park, Wyoming. Mammoth Hot Springs. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh01591 ID. Jackson, W.H. 1591 Yellowstone National Park, Wyoming. Mammoth Hot Springs. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh01592 ID. Jackson, W.H. 1592 Yellowstone National Park, Wyoming. Mammoth Hot Springs. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh01593 ID. Jackson, W.H. 1593 Yellowstone National Park, Wyoming. Mammoth Hot Springs. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh01594 ID. Jackson, W.H. 1594 Yellowstone National Park, Wyoming. Mammoth Hot Springs. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Yellowstone National Park/jwh01595 ID. Jackson, W.H. 1595 Yellowstone National Park, Wyoming. Liberty Cap in the Mammoth Hot Springs area. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Jackson W.H. Collection-jack1872/jwh01596 ID. Jackson, W.H. 1596 Emigrant Peak from Boteler's. Park County, Montana. 1872. (Stereoscopic view similar to photo 961) #1:/Yellowstone National Park/jwh01597 ID. Jackson, W.H. 1597 Yellowstone National Park, Wyoming. Valley of the Yellowstone River. 1872. U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Jackson W.H. Collection-jack1872/jwh01599 ID. Jackson, W.H. 1599 Stereo studies among the Rocky Mountains. Bridger Canyon near Fort Ellis. Gallatin County, Montana. 1872. (Stereoscopic views) #1:/Jackson W.H. Collection-jack1872/jwh01600 ID. Jackson, W.H. 1600 Stereo studies among the Rocky Mountains. Bridger Canyon near Fort Ellis. Gallatin County, Montana. 1872. (Stereoscopic views) #1:/Jackson W.H. Collection-jack1872/jwh01605 ID. Jackson, W.H. 1605 Stereo studies about Mt. Blackmore, M.T. Upper canyon of Middle Creek. Gallatin County, Montana. 1872. (Stereoscopic views) #1:/Jackson W.H. Collection-jack1872/jwh01606 ID. Jackson, W.H. 1606 Stereo studies about Mt. Blackmore, M.T. Upper canyon of Middle Creek. Gallatin County, Montana. 1872. (Stereoscopic views) #1:/Jackson W.H. Collection-jack1872/jwh01609 ID. Jackson, W.H. 1609 Stereo studies among Mt. Blackmore, M.T. View in upper canyon of Middle Creek. Gallatin County, Montana. 1872. (Stereoscopic view similar to Jackson, W.H. 969) #1:/Jackson W.H. Collection-jack1872/jwh01610 ID. Jackson, W.H. 1610 Stereo studies about Mt. Blackmore, M.T. View in the Upper Canyon of Middle Creek. Gallatin County, Montana. 1872. (Stereoscopic view similar to Jackson, W.H. 970) #1:/Jackson W.H. Collection-jack1872/jwh01611 ID. Jackson, W.H. 1611 Stereo studies about Mt. Blackmore, M. T. View in the Upper Canyon of Middle Creek. Gallatin County, Montana. 1872. (Stereoscopic view similar to Jachson, W.H. 970 and 1610) #1:/Jackson W.H. Collection-jack1872/jwh01612 ID. Jackson, W.H. 1612 Stereo studies about Mt. Blackmore, M.T. View in Upper Canyon of Middle Creek. Gallatin County, Montana. 1872. (Stereoscopic view similar to Jackson, W.H. 972) #1:/Jackson W.H. Collection-jack1872/jwh01613 ID. Jackson, W.H. 1613 Stereo studies about Mt. Blackmore, M.T. View in Upper Canyon of Middle Creek. Gallatin County, Montana. 1872. (Stereoscopic view similar to Jackson, W.H. 973) #1:/Jackson W.H. Collection-jack1872/jwh01614 ID. Jackson, W.H. 1614 Stereo studies about Mount Blackmore, M.T. Cascades, head of Middle Creek. Gallatin County, Montana. 1872. (Stereoscopic view similar to Jackson, W.H. 977) #1:/Jackson W.H. Collection-jack1872/jwh01615 ID. Jackson, W.H. 1615 Canyon of the West Gallatin, Montana Territory. Our trail over the rocks, Gallatin River. Gallatin County, Montana. 1872. (Stereoscopic view similar to Jackson, W.H. 982) #1:/Jackson W.H. Collection-jack1872/jwh01617 ID. Jackson, W.H. 1617 Canyon of the West Gallatin, Montana Territory. View in the Middle Canyon of the West Gallatin River. Gallatin County, Montana. 1872. (Stereoscopic view similar to Jackson, W.H. 986) #1:/Jackson W.H. Collection-jack1872/jwh01618 ID. Jackson, W.H. 1618 Canyon of the West Gallatin, Montana Territory. View in the Upper Canyon. Gallatin County, Montana. 1872. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1872/jwh01619 ID. Jackson, W.H. 1619 Canyon of the West Gallatin, Montana Territory. Camp in the Upper Canyon of the West Gallatin River. Gallatin County, Montana. 1872. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1872/jwh01621 ID. Jackson, W.H. 1621 Out West. Shadow Lake on divide between the Gallatin and Yellowstone Rivers. Yellowstone National Park. Wyoming. 1872. (Stereoscopic view similar to Jackson, W.H. 989, 1035) #1:/Jackson W.H. Collection-jack1874/jwh01623 ID. Jackson, W.H. 1623 Views among the Rocky Mountains of Colorado. Grand Lake, Middle Park. Rocky Mountain National Park. Grand County, Colorado. 1874. (Stereoscopic views; Jackson, W.H. 1622 similar to photo nos. 1051, 1052) #1:/Jackson W.H. Collection-jack1874/jwh01625 ID. Jackson, W.H. 1625 Views among the Rocky Mountains of Colorado. View among the rocks of Pleasant Park, near Larkspur. Douglas County, Colorado. 1874. (Stereoscopic view similar to Jackson, W.H. 1072) #1:/Jackson W.H. Collection-jack1874/jwh01626 ID. Jackson, W.H. 1626 Castle Rocks on the Divide, near Monument. El Paso County, Colorado. 1874. (Stereoscopic view similar to 1078) #1:/Jackson W.H. Collection-jack1874/jwh01627 ID. Jackson, W.H. 1627 Views among the Rocky Mountains of Colorado. View south from the La Plata Mountains. Colorado. 1874. (Stereoscopic view similar to Jackson, W.H. 1104) #1:/Jackson W.H. Collection-jack1874/jwh01628 ID. Jackson, W.H. 1628 Views among the Rocky Mountains of Colorado. Merritt's Ranch on the Rio Mancos. Colorado. 1874. (Stereoscopic view) #1:/Hovenweep National Monument/jwh01629 ID. Jackson, W.H. 1629 Hovenweep National Monument, Colorado. Hovenweep Castle. Ruined town on the Hovenweep, a tributary of the San Juan lying just within Colorado, occupying a prominent rocky bluff overlooking the usually dry bed of the creek. It consisted of a solid mass of small houses not more than 6 by 8 feet in diameter, arranged in a semicircle. The convex side was flush with the edge of the rocky bluff and inaccessible. The concave side, which was depressed like a amphitheater, was occupied by much lower and less important buildings, now almost unrecognizable. The most prominent of the buildings are solidly constructed of well-dressed stone, and not withstanding their exposed situations, are well preserved. 1874.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Grand Teton National Park/jwh0162a ID. Jackson, W.H. 162a Grand Teton National Park, Wyoming. The Grand Teton, originally named Mount Hayden. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1874/jwh01630 ID. Jackson, W.H. 1630 Views among the Rocky Mountains of Colorado. Camp scene. Marvin's Division, U.S.G.S. Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01631 ID. Jackson, W.H. 1631 Views among the Rocky Mountains of Colorado. Camp scene. Chittenden, topographer. Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01632 ID. Jackson, W.H. 1632 Views among the Rocky Mountains of Colorado. Camp scene. The "kinches", Charlie Anthony and Frank Smart.Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01633 ID. Jackson, W.H. 1633 Views among the Rocky Mountains of Colorado. Camp scene. Bob and Steve, packers. Photographic Division.Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01634 ID. Jackson, W.H. 1634 Views among the Rocky Mountains of Colorado. Camp scene. Charlie the cook and the bell mare. Photographic Division. Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01635 ID. Jackson, W.H. 1635 Views among the Rocky Mountains of Colorado. Camp scene. Sketching. Dr. Hayden and Walter Paris.Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01637 ID. Jackson, W.H. 1637 Views among the Rocky Mountains of Colorado. Camp scene. Charlie and Frank pitching tent. Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01638 ID. Jackson, W.H. 1638 Views among the Rocky Mountains of Colorado. Camp scene. Holmes and Chittenden rolling up bedding. Colorado. 1874. (Stereoscopic view similar to Jackson, W.H. 1292) #1:/Jackson W.H. Collection-jack1874/jwh01639 ID. Jackson, W.H. 1639 Views among the Rocky Mountains of Colorado. Camp scene. Chittenden stuffing war bag. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01640 ID. Jackson, W.H. 1640 Views among the Rocky Mountains of Colorado. Camp scene. The 1874 Photographic Division on the way to Los Pinos and Mesa Verde. Left to right: Smart, Anthony, Mitchell, Whan, Ernest, Ingersoll, and Charley, the cook. Dolly, the mule, stands between Charley and Ingersoll. Colorado. 1874. (Stereoscopic view similar to Jackson, W.H. 359) #1:/Jackson W.H. Collection-jack1874/jwh01641 ID. Jackson, W.H. 1641 Views among the Rocky Mountains of Colorado. Camp scene. The aparejo, "Old Meg." Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01642 ID. Jackson, W.H. 1642 Views among the Rocky Mountains of Colorado. Camp scene. Mess boxes and bedding. Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01643 ID. Jackson, W.H. 1643 Views among the Rocky Mountains of Colorado. Camp scene. Packing - the near side - the last pull on therope. Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01644 ID. Jackson, W.H. 1644 Views among the Rocky Mountains of Colorado. Camp scene. Flipping flapjacks, "Potato John." Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01645 ID. Jackson, W.H. 1645 Views among the Rocky Mountains of Colorado. Camp scene. "Strapped" miner. Colorado. 1874. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh01647 ID. Jackson, W.H. 1647 Camp scene. Figure is Dr. Hayden. 1870. (Stereoscopic view similar to Jackson, W.H. 1119) #1:/Jackson W.H. Collection-jack1870/jwh01648 ID. Jackson, W.H. 1648 Camp scene.A.L. Ford in view. This man was only on the 1870 expedition. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh01649 ID. Jackson, W.H. 1649 Camp scene. Figure is C.P. Carrington. 1870. (Stereoscopic view is similar to Jackson, W.H. 1123) #1:/Jackson W.H. Collection-jack1870/jwh01650 ID. Jackson, W.H. 1650 Camp scene. Figure is Schmitt, taxidermist.n.d. (Stereoscopic view) #1:/Jackson W.H. Collection-jack18ny/jwh01653 ID. Jackson, W.H. 1653 Turnbull's horse.n.d. (Stereoscopic view similar to Jackson, W.H. 1128) #1:/Jackson W.H. Collection-jack1875/jwh01655 ID. Jackson, W.H. 1655 Uncompahgre Peak from the south. Hinsdale County, Colorado. 1875. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1875/jwh01656 ID. Jackson, W.H. 1656 Uncompahgre Peak from the north. Hinsdale County, Colorado. 1875. (Stereoscopic views similar to photo no. 1139) #1:/Jackson W.H. Collection-jack1875/jwh01657 ID. Jackson, W.H. 1657 Uncompahgre Peak from the north. Hinsdale County, Colorado. 1875. (Stereoscopic views similar to photo no. 1139) #1:/Jackson W.H. Collection-jack1875/jwh01658 ID. Jackson, W.H. 1658 Head of Borens Gulch, La Plata Mountains, source of the La Plata River. La Plata County, Colorado. 1875. (Stereoscopic view similar to Jackson, W.H. 1154) #1:/Jackson W.H. Collection-jack1875/jwh01659 ID. Jackson, W.H. 1659 Punch and Judy, now called Navajo Twins. Two solitary knobs left standing upon the edge of the tablelands bordering the San Juan River. This river affords an excellent study of the sandstones of this region. San Juan County, Utah. 1875. (Stereoscopic view similar to photo nos. 536, 1156) #1:/Jackson W.H. Collection-jack1870/jwh01662 ID. Jackson, W.H. 1662 U.S. Geological Survey camp on the Sweetwater River. Wyoming. 1870? (Stereoscopic view) #1:/Yellowstone National Park/jwh01664 ID. Jackson, W.H. 1664 Yellowstone National Park, Wyoming. Hot Springs cone in Yellowstone Lake near the Thumb.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view #1:/Yellowstone National Park/jwh01666 ID. Jackson, W.H. 1666 Yellowstone National Park, Wyoming. Basins of the Gardner River hot springs. 1871.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). Stereoscopic view. #1:/Jackson W.H. Collection-jack18ny/jwh01667 ID. Jackson, W.H. 1667 Pack mule.n.d. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1872/jwh01668 ID. Jackson, W.H. 1668 Out West. Camp scene. W.P. Langford and C.S. Spencer. 1872. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1871/jwh01669 ID. Jackson, W.H. 1669 The Great West. Camp scene. Cook tent, U.S. Geological Survey at Ogden. Weber County, Utah. 1871. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh01670 ID. Jackson, W.H. 1670 Camp scene.L.A. Bartlett. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh01671 ID. Jackson, W.H. 1671 Camp scene. Henry Elliott, artist. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh01672 ID. Jackson, W.H. 1672 Camp scene. Ford, Beaman, Turnbull, and Thomas; U.S. Geological Survey. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh01673 ID. Jackson, W.H. 1673 Camp scene. Cyrus Thomas. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh01675 ID. Jackson, W.H. 1675 Camp scene. Wagon boss and teamsters, U.S. Geological Survey. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1870/jwh01676 ID. Jackson, W.H. 1676 Camp scene.U.S. Geological Survey on Rock Creek. Wyoming. 1870. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh01678 ID. Jackson, W.H. 1678 Study of picturesque pine and castellated rocks, with sun shining through the branches of the tree. Geologist at work under tree. El Paso County, Colorado. 1874. #1:/Jackson W.H. Collection-jack1875/jwh01679 ID. Jackson, W.H. 1679 View south from Tequa, showing Se-chum-e-way and Moqui, three villages of the Moquis, situated midway between the San Juan and the Little Colorado Rivers, about one hundred miles west of Fort Defiance, in Arizona. They occupy nearly the entire summit of a mesa about 600 feet in height, and so narrow at the southern end, near Moqui, that one can reach across from one perpendicular face to the other. Arizona. 1875. #1:/Yellowstone National Park/jwh01681 ID. Jackson, W.H. 1681 Yellowstone National Park, Wyoming. Castle Geyser and hot spring in Upper Geyser Basin. 1878 for U.S. Geological and Geographical Survey of the Territories (Hayden Survey), 1883 or 1885 for W.H. Jackson & Co., Denver. #1:/Jackson W.H. Collection-jack1883/jwh01682 ID. Jackson, W.H. 1682 "Grand Canyon of the Colorado" Possibly view in Lower Granite Gorge, Grand Canyon of the Colorado River. Men in foreground. By William Henry Jackson (for W.H. Jackson & Co., Denver) "W.H. Jackson & Co." and "No. 1068" on negative (cf. "No. 1069" in Naef, plate 126). Mohave County, Arizona. ca. 1883? Published as figure 71 in Ostroff, Eugene. Western views and Eastern Visions. Washington, D.C.: Smithsonian Institution, 1981. #1:/Yellowstone National Park/jwh01683 ID. Jackson, W.H. 1683 Yellowstone National Park, Wyoming. Grotto Gesyer in Upper Geyser Basin in eruption, probably viewed from across the Firehole River from west of the Grotto Geyser. Photo probably by W.H. Jackson, either 1878 for U.S. Geological and Geographical Survey of the Territories (Hayden Survey), 1883, or 1885 for W.H. Jackson & Co., Denver. #1:/Yellowstone National Park/jwh01684 ID. Jackson, W.H. 1684 Yellowstone National Park, Wyoming. Old Faithful in Upper Geyser Basin in eruption, probably viewed from the side nearest the Firehole River. Photo probably by W.H. Jackson, either 1878 (Hayden Survey), 1883, or 1885 (for W.H. Jackson & Co., Denver). #1:/Jackson W.H. Collection-jack1883/jwh01685 ID. Jackson, W.H. 1685 Pulpit Terraces. Mammoth Hot Springs. Yellowstone National Park, Wyoming. Ca. 1883. Published as figure 10 in New Mexico University Press. Second view Rephotographic Survey Project. Copyrighted 1984. #1:/Jackson W.H. Collection-jack1873/jwh01686 ID. Jackson, W.H. 1686 Red Rock Falls. Gunnison County, Colorado. 1873. Published as figure 18 in New Mexico University Press. Second View Rephotographic survey Project. Copyrighted 1984. #1:/Jackson W.H. Collection-jack1878/jwh01687 ID. Jackson, W.H. 1687 Crater of the Lone Star Geyser. Yellowstone National Park, Wyonming. Ca. 1878. (Stereoscopic view available). Published as figure 34 in New Mexico University Press. Second View Rephotographic Survey Project. Copyrighted 1984. #1:/Jackson W.H. Collection-jack1875/jwh01688 ID. Jackson, W.H. 1688 The Upper Twin Lake. Lake Couty, Colorado. 1875. Published as figure 52 in New Mexico University Press. Second View Rephotogrphic Survey Project. Copyrighted 1984. #1:/Jackson W.H. Collection-jack1875/jwh01689 ID. Jackson, W.H. 1689 Baker's Park and Sultan Mountain. San Juan County, Colorado. 1875. Published as figure 88 in New Mexico Universty Press. Second View Rephotographic Survey Project. Copyrighted 1984. #1:/Jackson W.H. Collection-jack1875/jwh01690 ID. Jackson, W.H. 1690 Lake San Cristoval. Hinsdale County, Colorado. 1875. Published as figure 94 in New mexico University Press. Second View Rephotographic Survey Project. Copyrighted 1984. #1:/Jackson W.H. Collection-jack1883/jwh01691 ID. Jackson, W.H. 1691 Grand Canyon of the Yellowstone from the top of the lower falls. Yellowstone nation Park, Wyonming. Ca. 1883. Second View Rephotographic Survey Project. Copyrighted 1984. #1:/Yellowstone National Park/jwh01692 ID. Jackson, W.H. 1692 Yellowstone National Park, Wyoming. Hot Springs and Castle Geyser in Upper Geyser Basin. Circa 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Yellowstone National Park/jwh0207a ID. Jackson, W.H. 207a Yellowstone National Park, Wyoming. No information provided. 1872.U.S. Geological and Geographical Survey of the Territories (Hayden Survey). #1:/Jackson W.H. Collection-jack1870/jwh0332a ID. Jackson, W.H. 332a The Flaming Gorge, a view on Green River, very near the location where Major Powell launched his expeditions for the Colorado River. View at the mouth of Henrys Fork, of great beauty, and which derives its principal charm from the vivid coloring. The waters of the river are of the purest emerald, with banks and sand bars of glistening white. The perpendicular bluff to the right is nearly 1,500 feet above the level of the river, and of a bright red and yellow. When entrance or gateway to the still greater wonders and grandeurs of the famous Red Canyon, that cuts its way to a depth of 3,000 feet between this point and its entrance into Browns Hole. Daggett County, Utah. 1870. #1:/Jackson W.H. Collection-jack1869/jwh0716a ID. Jackson, W.H. 716a Street view in Corinne. Box Elder County, Utah. 1869. #1:/Jackson W.H. Collection-jack1869/jwh0733a ID. Jackson, W.H. 733a Devils Gate, Weber Canyon. Weber County, Utah. 1869. (Stereoscopic view) #1:/Jackson W.H. Collection-jack1874/jwh1112a ID. Jackson, W.H. 1112a Topographical work. Chittenden and Holmes. 1874. #1:/Great Smoky Mountains National Park/ka000290 ID. Keith, A. 290 Great Smoky Mountains National Park, Tennessee and North Carolina. Smoky Mountains, looking north 20 degrees west and north 10 degrees west respectively, from the east end of Mount Collins. 1902. See also photo ka000292. #1:/Great Smoky Mountains National Park/ka000291 ID. Keith, A. 291 Great Smoky Mountains National Park, Tennessee and North Carolina. Smoky Mountains, looking north 60 degrees east, from the east end of Mount Collins. 1902. #1:/Great Smoky Mountains National Park/ka000292 ID. Keith, A. 292 Great Smoky Mountains National Park, Tennessee and North Carolina. Smoky Mountains, looking north 20 degrees west and north 10 degrees west respectively, from the east end of Mount Collins. 1902. See also photo ka000290. #1:/San Fernando, California, Earthquake February 1971/kac00003 ID. Kachadoorian, R. 3ct San Fernando, California, Earthquake February 1971. Slumps (landslide) at Van Norman Dam. February 1971. #1:/San Fernando, California, Earthquake February 1971/kac00004 ID. Kachadoorian, R. 4ct San Fernando, California, Earthquake February 1971. Landslide(?) damage to lower Van Norman Dam. February 9, 1971. #1:/San Fernando, California, Earthquake February 1971/kac00031 ID. Kachadoorian, R. 31ct San Fernando, California, Earthquake February 1971. Twisted and loose pipe support, probably in the Los Angeles Aqueduct. 1971. #1:/San Fernando, California, Earthquake February 1971/kac00034 ID. Kachadoorian, R. 34ct San Fernando, California, Earthquake February 1971. Damaged spirally-wrapped concrete pillars and broken window glass at Olive View Hospital. February 23, 1971. See also photo kac00035. #1:/San Fernando, California, Earthquake February 1971/kac00035 ID. Kachadoorian, R. 35ct San Fernando, California, Earthquake February 1971. Damaged spirally-wrapped concrete pillars, showing exposed steel reinforcement rods at Olive View Hospital. February 23, 1971. See also photo kac00034. #1:/San Fernando, California, Earthquake February 1971/kac00037 ID. Kachadoorian, R. 37ct San Fernando, California, Earthquake February 1971. Fallen structurally- separated stair tower and leaning north stair tower (left) at Olive View Hospital. Emergency vehicles are visible in the foreground. View is from the west. #1:/San Fernando, California, Earthquake February 1971/kac00040 ID. Kachadoorian, R. 40ct San Fernando, California, Earthquake February 1971. Two fallen structurally- separated stair towers and the collapsed basement at Olive View Hospital. View is north. #1:/San Fernando, California, Earthquake February 1971/kac00041 ID. Kachadoorian, R. 41ct San Fernando, California, Earthquake February 1971. Two fallen structurally- separated stair towers and the collapsed basement at Olive View Hospital. View is north. #1:/San Fernando, California, Earthquake February 1971/kac00050 ID. Kachadoorian, R. 50ct San Fernando, California, Earthquake February 1971. Interior of an office/clinic at Olive View Hospital, showing fallen concrete tile and insulation. February 1971. #1:/San Fernando, California, Earthquake February 1971/kac00057 ID. Kachadoorian, R. 57ct San Fernando, California, Earthquake February 1971. Buildings 1 and 2 at Veterans Hospital collapsed. #1:/San Fernando, California, Earthquake February 1971/kac00077 ID. Kachadoorian, R. 77ct San Fernando, California, Earthquake February 1971. Column and ceiling damage in the basement (covered parking?) of Olive View Hospital. 1971. #1:/San Fernando, California, Earthquake February 1971/kac00105 ID. Kachadoorian, R. 105ct San Fernando, California, Earthquake February 1971. Displaced Southern Pacific Railroad tracks near Los Angeles County Juvenile Hall. #1:/San Fernando, California, Earthquake February 1971/kac00107 ID. Kachadoorian, R. 107ct San Fernando, California, Earthquake February 1971. Southern Pacific railroad tracks near Los Angeles County Juvenile Hall, showing laterally displaced tracks. Repair operations in progress. February 10, 1971. #1:/San Fernando, California, Earthquake February 1971/kac00113 ID. Kachadoorian, R. 113ct San Fernando, California, Earthquake February 1971. Southern Pacific railroad tracks, showing laterally and vertically displaced tracks. February 10, 1971. #1:/San Fernando, California, Earthquake February 1971/kac00123 ID. Kachadoorian, R. 123ct San Fernando, California, Earthquake February 1971. Collapsed interchange of Interstate 5 and Interstate 14. View is southeast. #1:/San Fernando, California, Earthquake February 1971/kac00128 ID. Kachadoorian, R. 128ct San Fernando, California, Earthquake February 1971. Landslide and other damage at lower Van Norman Dam. View is east. #1:/San Fernando, California, Earthquake February 1971/kac00159 ID. Kachadoorian, R. 159ct San Fernando, California, Earthquake February 1971. Toe of a landslide, under water, in upper Van Norman Reservoir. #1:/San Fernando, California, Earthquake February 1971/kac00163 ID. Kachadoorian, R. 163ct San Fernando, California, Earthquake February 1971. House on Featon(?) Street damaged by displacement along a reverse fault. 1971. #1:/San Fernando, California, Earthquake February 1971/kac00166 ID. Kachadoorian, R. 166ct San Fernando, California, Earthquake February 1971. Collapsed frame house on Wallaby Street, east of Veterans Hospital, under construction at the time of the earthquake. 1971. #1:/San Fernando, California, Earthquake February 1971/kac00167 ID. Kachadoorian, R. 167ct San Fernando, California, Earthquake February 1971. Displaced new frame house under construction on Wallaby Street, east of Veterans Hospital. 1971. #1:/San Fernando, California, Earthquake February 1971/kac00169 ID. Kachadoorian, R. 169ct San Fernando, California, Earthquake February 1971. Severely damaged new frame house on Wallaby Street, east of Veterans Hospital. 1971. #1:/San Fernando, California, Earthquake February 1971/kac00175 ID. Kachadoorian, R. 175ct San Fernando, California, Earthquake February 1971. Stud framing, showing holes torn in the tar paper exterior of a new frame house 0.3 mile east of Veterans Hospital. 1971. #1:/San Fernando, California, Earthquake February 1971/kac00183 ID. Kachadoorian, R. 183ct San Fernando, California, Earthquake February 1971. Bi-level house, laterally moved, with its upper level crushing the lower level. Note the garden wall cutting the house. 1971. #1:/San Fernando, California, Earthquake February 1971/kac00184 ID. Kachadoorian, R. 184ct San Fernando, California, Earthquake February 1971. Bi-level house with its lower level vertically displaced from the upper level, exposing studs. The house apparently shifted laterally, as shown by the leaning garage wall. 1971. #1:/San Fernando, California, Earthquake February 1971/kac00193 ID. Kachadoorian, R. 193ct San Fernando, California, Earthquake February 1971. An older house, near the corner of Harding and Bromfield, shifted and tilted on its foundation. It is held in place by a single 6 x 6 board. An adjacent building appears to be undisturbed. 1971. #1:/San Fernando, California, Earthquake February 1971/kac00194 ID. Kachadoorian, R. 194ct San Fernando, California, Earthquake February 1971. An older house, near the corner of Harding and Bromfield, shifted on its foundation. It is held in place by a single 6 x 6 board. The car was crushed by the house. 1971. #1:/San Fernando, California, Earthquake February 1971/kac00196 ID. Kachadoorian, R. 196ct San Fernando, California, Earthquake February 1971. Failed upper portion of a second-story stucco wall, probably an older apartment house. 1971. #1:/San Fernando, California, Earthquake February 1971/kac00197 ID. Kachadoorian, R. 197ct San Fernando, California, Earthquake February 1971. Fractured stucco, probably on a masonry wall of an older house. 1971. #1:/San Fernando, California, Earthquake February 1971/kac00201 ID. Kachadoorian, R. 201ct San Fernando, California, Earthquake February 1971. Scarplet cutting diagonally across a dwelling's front yard, viewed from the street. Note the warning sign on the garage door and the barricaded front door. 1971. #1:/San Fernando, California, Earthquake February 1971/kac00264 ID. Kachadoorian, R. 264ct San Fernando, California, Earthquake February 1971. Vertical and horizontal movement (approximately 5 inches) on the support pier of the 96-inch Penstock pipeline. 1971. #1:/San Fernando, California, Earthquake February 1971/kac00265 ID. Kachadoorian, R. 265ct San Fernando, California, Earthquake February 1971. Expansion joint on the 96- inch Penstock pipeline (first Los Angeles Aqueduct). 1971. #1:/San Fernando, California, Earthquake February 1971/kac00266 ID. Kachadoorian, R. 266ct San Fernando, California, Earthquake February 1971. Moved 54-inch upper Van Norman Reservoir by-pass pipeline (A 283 Gr. C), as shown by the ring girder support. Note the loose bolts at the bottom. 1971. #1:/San Fernando, California, Earthquake February 1971/kac00274 ID. Kachadoorian, R. 274ct San Fernando, California, Earthquake February 1971. Compression failure in a section of 49.5-inch outside diameter, welded steel pipe from the Granada trunk line in the Metropolitan Water District corridor. (A 283 Gr C, 1/4-inch plate). 1971. #1:/San Fernando, California, Earthquake February 1971/kac00282 ID. Kachadoorian, R. 282ct San Fernando, California, Earthquake February 1971. Section of 24-inch by 3/8- inch plate pipe telescoped at a mechanically coupled joint (coupling removed) from the Maclay Reservoir outlet line on Foothill Boulevard in the Sylmar area. 1971. #1:/San Fernando, California, Earthquake February 1971/kac00287 ID. Kachadoorian, R. 287ct San Fernando, California, Earthquake February 1971. View looking through a section of 49.5-inch outside diameter x 1/4-inch welded steel pipe A 283 Gr. C., showing the failure of a mechanically coupled joint with 2-inch diameter rods, from Granada trunk line of the Metropolitan Water District corridor. 1971. #1:/San Fernando, California, Earthquake February 1971/kach0020 ID. Kachadoorian, R. 20ct San Fernando, California, Earthquake February 1971. Collapsed highway overpass, probably the Interstate 5 and Interstate 14 interchange. 1971. #1:/San Fernando, California, Earthquake February 1971/kach0024 ID. Kachadoorian, R. 24ct San Fernando, California, Earthquake February 1971. Damaged steel-reinforced concrete support on Interstates 5 and 14. 1971. #1:/San Fernando, California, Earthquake February 1971/kach0042 ID. Kachadoorian, R. 42ct San Fernando, California, Earthquake February 1971. Fallen, structurally- separated stairwell tower and collapsed basement of Olive View Hospital. View is north. 1971. #1:/San Fernando, California, Earthquake February 1971/kach0045 ID. Kachadoorian, R. 45ct San Fernando, California, Earthquake February 1971. Fallen stair tower of Olive View Hospital, viewed across the parking lot. 1971. #1:/San Fernando, California, Earthquake February 1971/kach0049 ID. Kachadoorian, R. 49ct San Fernando, California, Earthquake February 1971. Damaged Los Angeles County ambulance still under collapsed covered parking at Olive View Hospital. 1971. #1:/San Fernando, California, Earthquake February 1971/kach0083 ID. Kachadoorian, R. 83ct San Fernando, California, Earthquake February 1971. Fallen south stair tower with barricade fence at Olive View Hospital. February 23, 1971. #1:/San Fernando, California, Earthquake February 1971/kach0100 ID. Kachadoorian, R. 100ct San Fernando, California, Earthquake February 1971. Collapsed administration building at Los Angeles County Juvenile Hall. 1971. #1:/San Fernando, California, Earthquake February 1971/kach0101 ID. Kachadoorian, R. 101ct San Fernando, California, Earthquake February 1971. Open fissure in the girls dormitory at Los Angeles County Juvenile Hall. 1971. #1:/San Fernando, California, Earthquake February 1971/kach0181 ID. Kachadoorian, R. 181ct San Fernando, California, Earthquake February 1971. Split-level house with the upper level separated from the lower level and moved laterally approximately 12 feet. 1971. #1:/San Fernando, California, Earthquake February 1971/kach0187 ID. Kachadoorian, R. 187ct San Fernando, California, Earthquake February 1971. Frame house at 14000 Emir Avenue heavily damaged by lateral and vertical displacement. 1971. #1:/San Fernando, California, Earthquake February 1971/kach0202 ID. Kachadoorian, R. 202ct San Fernando, California, Earthquake February 1971. Laterally offset driveway curb cut. 1971. #1:/San Fernando, California, Earthquake February 1971/kach0260 ID. Kachadoorian, R. 260ct San Fernando, California, Earthquake February 1971. "Elephant Foot" caused by the movement of water in a large steel storage tank. Fractured sidewalk at the lower left. 1971. #1:/San Fernando, California, Earthquake February 1971/kach0267 ID. Kachadoorian, R. 267ct San Fernando, California, Earthquake February 1971. Loose bolts on a ring girder support of the 54-inch upper Van Norman Reservoir by-pass pipeline. 1971. #1:/San Fernando, California, Earthquake February 1971/kach0280 ID. Kachadoorian, R. 280ct San Fernando, California, Earthquake February 1971. Section of a 24-inch by 3/8-inch plate pipe telescoped at a mechanically coupled joint (coupling removed) on the Maclay Reservoir outlet line on Foothill Boulevard in the Sylmar area. 1971. #1:/San Fernando, California, Earthquake February 1971/kach0283 ID. Kachadoorian, R. 283ct San Fernando, California, Earthquake February 1971. Buckle at approximate mid- height where plate thickness changed from 9/16-inch to 7/16-inch in the 2- million gallon Sesnon Reservoir tank. 1971. #1:/San Fernando, California, Earthquake February 1971/kach0286 ID. Kachadoorian, R. 286ct San Fernando, California, Earthquake February 1971. Side views of sections of a 49.5-inch (outside) diameter x 1/4-inch welded steel pipe A 283 Gr.C., showing a mechanically coupled joint failure with 2-inch diameter rods (on exterior) from the Granada Trunk line in the Metropolitan Water District corridor. 1971. #1:/San Fernando, California, Earthquake February 1971/kach0302 ID. Kachadoorian, R. 302ct San Fernando, California, Earthquake February 1971. Interior, as well as the exterior, sides of a section of 24-inch by 3/8-inch plate pipe telescoped at a mechanically coupled joint. 1971. #1:/Truckee, California, Earthquake September 12, 1966/kach0307 ID. Kachadoorian, R. 307ct Truckee, California, Earthquake September 12, 1966. Rock falls on the old highway road from Interstate Highway 80 about 2 miles east of Boca. September 1966. #1:/Truckee, California, Earthquake September 12, 1966/kach0328 ID. Kachadoorian, R. 328ct Truckee, California, Earthquake September 12, 1966. Small powerhouse at Farad on the Truckee River 3 miles east of Boca Reservoir, showing a near-circular hole about 9 feet in diameter punctured in the brick wall by the large falling boulder. The boulder fell from the slope about 100 feet west of Interstate Highway 80, skipped across the highway and catwalk, bounced near the base of the power pole in the center and then into the brick wall. September 1966. #1:/Truckee, California, Earthquake September 12, 1966/kach0350 ID. Kachadoorian, R. 350ct Truckee, California, Earthquake September 12, 1966. Cracked cement foundation of the watermaster's house, built on uncompacted fill at Boca Reservoir. The chimney toppled. 1966. #1:/Truckee, California, Earthquake September 12, 1966/kach0352 ID. Kachadoorian, R. 352ct Truckee, California, Earthquake September 12, 1966. Rendered and cracked cement foundation of the watermaster's house, built on uncompacted fill at Boca Reservoir, caused by the frame vibrating sill anchor bolts. 1966. #1:/Alaska/kal00009 ID. Kimball, A.L. 9ct Alaska. Diorite in the eastern Chugach Mountains. 1959. #1:/Puerto Rico/kca00027 ID. Kaye, C.A. 27 Puerto Rico. Tidal terrace on the ocean side of an eolianite ridge at low tide, showing heavy algal mat on the outer rim and the nip both above and below the terrace. As is usual for the ocean side, the upper lip shows up poorly because the fragile visor has been broken off by storm waves. Note that continuation of the profile of the dune ridge intersects the tidal terrace. Circa 1950. Figure 36, U.S. Geological Survey Professional Paper 317-B. #1:/Puerto Rico/kca00029 ID. Kaye, C.A. 29 Puerto Rico. Tidal terrace developed at the base of pitting eolianite. Note relict eolianite pinnacles. Circa 1950. Figure 38, U.S. Geological Survey Professional Paper 317-B. #1:/Keith A. Collection-Jordan Mine/kei00162 ID. Keith, A. 162 Looking southwest, Surface workings on the galena fissure, Old Jordan Mine. Salt Lake County, Utah. 1900. Plate 39 in U.S. Geological Survey. Professional paper 38. 1905. #1:/Keith A. Collection-Yosemite Mine/kei00167 ID. Keith, A. 167 Outcrop of quartzite footwall of Brooklyn ore bodies, Yosemite Mine, looking northeast. Salt Lake County, Utah. 1900. Plate 45 in U.S. Geological Survey. Professional paper 38. 1905. #1:/New York/kem00009 ID. Kindle, E.M. 9 New York. Joint planes in the portage north of McKinney at Lake Cayuga. Figure 9, U.S. Geological Survey Folio 169. #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp001 ID. King, 1 Hot Springs, Nevada. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp002 ID. King, 2 Virginia City, Nevada. Mount Davidson in the background. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp003 ID. King, 3 Quartz mill at Virginia City, Nevada. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp004 ID. King, 4 Mono Lake in the Sierra Nevada Mountains of California. Obsidian Crater in the foreground. Photo by T.H. O'Sullivan, March 1868.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp005 ID. King, 5 No information provided. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp006 ID. King, 6 Two members of King's expedition on one of the mounds in Pyramid Lake in Nevada. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp007 ID. King, 7 Near Steamboat Springs in Washoe Valley, Nevada. Photo by T.H. O'Sullivan. U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp008 ID. King, 8 No information provided. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp009 ID. King, 9 Sand dunes on the east of side of the Truckee Desert in Nevada. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp010 ID. King, 10 Austin, Nevada, in the Reese River district. Looking down canyon. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp011 ID. King, 11 Truckee Desert in Nevada. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp012 ID. King, 12 Astronomical observatory, probably near Fort Ruby, Nevada. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp013 ID. King, 13 Fort Ruby, Nevada. Photo by T.H. O'Sullivan, 1868.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp014 ID. King, 14 Fort Ruby, Nevada. Photo by T.H. O'Sullivan, 1868.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp015 ID. King, 15 Hot Springs, Nevada. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp016 ID. King, 16 No information provided. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp017 ID. King, 17 Alpine lake 1100 feet above the sea on Humboldt Mountain in Nevada. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp018 ID. King, 18 East Humboldt Mountains in Nevada. Quartzites at the head of Glacial Canyon. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp019 ID. King, 19 Shoshone Falls (212-foot drop) on the Snake River in Idaho. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp020 ID. King, 20 Shoshone Falls (212-foot drop) on the Snake River in Idaho. Basalt above, andesite below. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp021 ID. King, 21 City of Rocks, Nevada. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp022 ID. King, 22 King camp near Salt Lake City, Utah. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp023 ID. King, 23 Big Cottonwood Canyon in the Wasatch Mountains of Utah. Cambrian quartzites. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp024 ID. King, 24 No information provided. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp025 ID. King, 25 No information provided. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp026 ID. King, 26 Big Cottonwood Canyon in the Wasatch Mountains of Utah Territory. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp027 ID. King, 27 Big Cottonwood Canyon in the Wasatch Mountains of Utah. Cambrian quartzites. Strike northwest, dip northeast. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp028 ID. King, 28 Limestones in Provo Canyon in the Wasatch Mountains of Utah Territory. The cliffs are 2000 feet. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp029 ID. King, 29 Limestones in American Fork Canyon in the Wasatch Mountains of Utah. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp030 ID. King, 30 Canyon in the Wasatch Mountains of Utah. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp031 ID. King, 31 Glacial lake in the summit region of the Uinta Mountains of Utah. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp032 ID. King, 32 Upper Bear River in Utah. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp033 ID. King, 33 Uinta Mountain summits. Mount Agassiz and Lake Agassiz in Uinta quartzites. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp034 ID. King, 34 Glacial lake in the summit region of the Uinta Mountains in Utah. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp035 ID. King, 35 Round house on the Union Pacific Railroad at (?). Photo by T.H. O'Sullivan. U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp036 ID. King, 36 T.H. O'Sullivan's mules near the edge of the mouth of a geyser in the Pahute Mountains of Nevada. Photo by T.H. O'Sullivan, 1871.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp038 ID. King, 38 Cave-in at Comstock Mine near Virginia City, Nevada. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp039 ID. King, 39 Conoidal weathering of granite. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp040 ID. King, 40 No information provided.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp041 ID. King, 41 Miner at work in the Comstock Lode at Virginia City, Nevada. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp042 ID. King, 42 Contorted limestones in Nevada. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp043 ID. King, 43 Quartz mill near Virginia City, Nevada. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp044 ID. King, 44 East Humboldt Mountains in Nevada. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp045 ID. King, 45 Summer snow bank in the East Humboldt Mountains of Nevada. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp046 ID. King, 46 Gold Hill ravine near Virginia City, Nevada. Photo by T.H. O'Sullivan, 1868. U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp047 ID. King, 47 Smelting works in Nevada. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp048 ID. King, 48 Cage used in the Comstock Mine near Virginia City, Nevada. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp049 ID. King, 49 Comstock Lode near Virginia City, Nevada. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp050 ID. King, 50 Comstock Lode near Virginia City, Nevada. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp051 ID. King, 51 West half of Larger Soda Lake near Ragtown, Nevada. Photo by T.H. O'Sullivan. U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp052 ID. King, 52 Donner Lake Pass in the Sierra Nevada Mountains of California. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp053 ID. King, 53 Donner Lake Pass in the Sierra Nevada Mountains of California. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp054 ID. King, 54 Sierra Nevada Mountains, viewed from Mono Lake in Bloody Canyon in California. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp055 ID. King, 55 Lassen Peak, overlooking "Chaos" in California. Photo by T.H. O'Sullivan. U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp056 ID. King, 56 Mud volcano on Lassen Peak in California. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp057 ID. King, 57 Lassen Peak and "Chaos" in California. Nevadite flow. Photo by C.E. Watkins. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp058 ID. King, 58 Lassen Peak in California. Photo by C.E. Watkins. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp059 ID. King, 59 Block of nevadite on "Chaos" in California. Photo by C.E. Watkins. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp060 ID. King, 60 Lassen Peak in California, viewed from "Chaos." Photo by C.E. Watkins. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp061 ID. King, 61 Lassen Peak in California. Photo by C.E. Watkins. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp062 ID. King, 62 Eastern slopes of Mount Shasta in California. Photo by C.E. Watkins.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp063 ID. King, 63 Mount Shasta and Shastina (crater) with the Whitney Glacier between. Photo by C.E. Watkins.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp064 ID. King, 64 Northwest slopes of Mount Shasta, viewed from Shasta Valley in California. Photo by C.E. Watkins.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp065 ID. King, 65 Mount Shasta in California, looking northwestward from the slopes of the mountain over Shasta Valley. Parasitic cones. Photo by C.E. Watkins. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp066 ID. King, 66 Mount Shasta in California. Photo by C.E. Watkins. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp067 ID. King, 67 Mount Shasta in California, viewed from horse camp. Photo by C.E. Watkins. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp068 ID. King, 68 Mount Shasta and Little Shasta, viewed from Sissons, California. Photo by C.E. Watkins. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp069 ID. King, 69 No information provided (Mount Shasta?). Photo by C.E. Watkins. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp070 ID. King, 70 Sheep Rock, 15 miles north of Mount Shasta in California. Photo by C.E. Watkins. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp071 ID. King, 71 Mount Shasta in California, viewed from Sheep Rock, 15 miles distant. Photo by C.E. Watkins. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp072 ID. King, 72 Mount Shasta in California, looking westward out through the tip of the crater (Shastina). Photo by C.E. Watkins. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp073 ID. King, 73 Mount Shasta and Whitney Glacier in California, seen from the crater (Shastina). Photo by C.E. Watkins. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp074 ID. King, 74 View from Shasta Valley, California. Photo by C.E. Watkins. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp075 ID. King, 75 Mount Shasta and Whitney Glacier in California, looking down (northwest). Photo by C.E. Watkins. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp076 ID. King, 76 Glacial lake in the summit region of the Uinta Mountains of Utah. Photo by T.H. O'Sullivan. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp077 ID. King, 77 Upper Bear River Valley in Utah. Photo by T.H. O'Sullivan. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp078 ID. King, 78 Salt Lake City, Utah, and the Wasatch Mountains. Twin Peak in the center. Lone Peak on the right. Photo by T.H. O'Sullivan, 1869. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp079 ID. King, 79 Mount Shasta and Whitney Glacier crevasses, seen from the crater (Shastina). Whitney Glacier in California was the first glacier described in the United States. Clarence King in the foreground. Photo by C.E. Watkins. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp080 ID. King, 80 Camp scene. Photo by T.H. O'Sullivan. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp081 ID. King, 81 Tertiary bluffs (Green River Eocene) near Green River City, Wyoming Territory. Photo by T.H. O'Sullivan. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp082 ID. King, 82 Tertiary conglomerate in Weber Valley in Utah Territory. Photo by T.H. O'Sullivan. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp083 ID. King, 83 Tertiary bluffs (Green River Eocene) near Green River City, Wyoming Territory. Photo by T.H. O'Sullivan. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp084 ID. King, 84 Tertiary (Eocene) sandstone at Castle Rock in Echo Canyon in Utah Territory. Photo by T.H. O'Sullivan. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp085 ID. King, 85 Entrance to Ogden Canyon in the Wasatch Mountains of Utah Territory. Photo by T.H. O'Sullivan. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp086 ID. King, 86 Wasatch Mountains near Ogden, Utah Territory. Photo by T.H. O'Sullivan. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp087 ID. King, 87 Green River Canyons: Upper Canyon, Great Bend, Horseshoe Canyon at the Bend. Photo by T.H. O'Sullivan. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp088 ID. King, 88 Green River Canyons: Upper Canyon, Great Bend, Green River below Horseshoe Bend, viewed from Flaming Gorge Cliff. Photo by T.H. O'Sullivan. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp089 ID. King, 89 Green River Canyons: Upper Canyon, Great Bend, Uinta Mountains, Horseshoe Bend, and Green River below the bend, viewed from Flaming Gorge Ridge. Photo by T.H. O'Sullivan. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp090 ID. King, 90 Green River Canyons: contorted strata on Red Creek. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp091 ID. King, 91 Green River Canyons: Vermillion Creek Canyon, looking down-stream out to Brown's Park. Photo by T.H. O'Sullivan. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp092 ID. King, 92 Summits of the Humboldt Mountains in eastern Nevada. Photo by T.H. O'Sullivan. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp093 ID. King, 93 Camp Douglas and the east end of Salt Lake City, Utah Territory. Wasatch Mountains in the background. Emigration Canyon on the left. Photo by T.H. O'Sullivan, 1869. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp094 ID. King, 94 Summits of the Humboldt Mountains, East Humboldt Mountains, Lake Marion in eastern Nevada. Photo by T.H. O'Sullivan. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp095 ID. King, 95 Bedded rhyolite in Nevada. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp096 ID. King, 96 Clarence King in camp near Salt Lake City, Utah. Photo by T.H. O'Sullivan, October 1868.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp097 ID. King, 97 No information provided.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp098 ID. King, 98 No information provided.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp099 ID. King, 99 No information provided.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp100 ID. King, 100 No information provided.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp101 ID. King, 101 No information provided.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp102 ID. King, 102 No information provided.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp103 ID. King, 103 No information provided.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp104 ID. King, 104 No information provided.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp37a ID. King, 37a No information provided. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/U.S. Geological Exploration of the 40th Parallel (King Survey)/kingp37b ID. King, 37b No information provided. Photo by T.H. O'Sullivan.U.S. Geological Exploration of the Fortieth Parallel (King Survey). #1:/Nevada-Professional paper 114/knop0161 ID. Knopf, A. 161 Garnetite breccia in which the fragments have been partly replaced by epidote, Bluestone Mine; shows epidote and fragments of brecciated garnetite. Lyon County, Nevada. 1914. Plate 5-A in U.S. Geological Survey. Professional paper 114. 1918. #1:/Nevada-Professional paper 114/knop0162 ID. Knopf, A. 162 Specimen showing junction of unreplaced limestone with portion wholly replace by andradite; also sulphides (chalcopyrite and pyrite), limestone and decarbonized limestone. Lyon County, Nevada. 1914. Plate 4-A, with graphics, in U.S. Geological Survey. Professional paper 114. 1918. #1:/Nevada-Professional paper 114/knop0163 ID. Knopf, A. 163 Garnetized Halobia. Lyon County, Nevada. 1914. Plate 2-A in U.S. Geological Survey. Professional paper 114. 1918. #1:/Nevada-Professional paper 114/knop0164 ID. Knopf, A. 164 Photomicrograph of latite vitrophyre, showing Labradorite, pyroxene and biotite: Lyon County, Nevada. 1914. Plate 2-B, with graphics, in U.S. Geological Survey. Professional paper 114. 1918. #1:/Nevada-Professional paper 114/knop0165 ID. Knopf, A. 165 Gangue of copper ore, in which andradite is interstitial between pyroxene crystals, Western Nevada Mine. Lyon County, Nevada. 1914. Plate 5-B, with graphics, in U.S. Geological Survey. Professional paper 114. 1918. #1:/Nevada-Professional paper 114/knop0166 ID. Knopf, A. 166 Garnetized, silicified, and pyritized porphyry from the Ludwig mine; showing garnet, epidote and pyrite. Lyon County, Nevada. 1914. Plate 4-B, with graphics, in U.S. Geological Survey. Professional paper 114. 1918. #1:/Glacier Bay National Park and Preserve/kot00007 ID. Koteff, C. 7 Glacier Bay National Park and Preserve, Alaska. Scree on Casement Glacier. July 1975. Figure 10, U.S. Geological Survey Professional Paper 1179. See also photo kot00010. #1:/Glacier Bay National Park and Preserve/kot00008 ID. Koteff, C. 8 Glacier Bay National Park and Preserve, Alaska. Detached ice block on Casement Glacier, showing only thin surface covering of debris. The sides of the block have been partly covered by mud flowing from the ice surface during melting. July 1975. Figure 11, U.S. Geological Survey Professional Paper 1179. #1:/Glacier Bay National Park and Preserve/kot00009 ID. Koteff, C. 9 Glacier Bay National Park and Preserve, Alaska. Debris on Casement Glacier derived from shear planes. The axe is on the intersection of the glacier surface and shear plane that dips sharply up ice to the right. Debris is concentrated left of the axe, and the surface debris zone can be traced toward the viewer. July 1975. Figure 14-A, U.S. Geological Survey Professional Paper 1179. #1:/Glacier Bay National Park and Preserve/kot00010 ID. Koteff, C. 10 Glacier Bay National Park and Preserve, Alaska. Debris on Casement Glacier derived from shear planes. Shear plane in ice dipping to the left. The large clasts along the shear plane are much rounder than the clasts shown in photo kot00007. July 1975. Figure 14-B, U.S. Geological Survey Professional Paper 1179. #1:/Glacier Bay National Park and Preserve/kot00011 ID. Koteff, C. 11 Glacier Bay National Park and Preserve, Alaska. Casement Glacier, looking southeast. Morainal debris near the center of the glacier is a thin surface accumulation. Debris covering the area at the edge of the glacier is interpreted as having been derived chiefly from live ice acting as a conveyor belt. Photo by A. Post, August 1964. Figure 15-A, U.S. Geological Survey Professional Paper 1179. #1:/Glacier Bay National Park and Preserve/kot00012 ID. Koteff, C. 12 Glacier Bay National Park and Preserve, Alaska. Casement Glacier, looking northeast. Morainal debris near the center of the glacier is a thin surface accumulation. Debris covering the area at the edge of the glacier is interpreted as having been derived from the dirt. Photo by A. Post, 1975. Figure 15-B, U.S. Geological Survey Professional Paper 1179. #1:/Great Smoky Mountains National Park/kpb00454 ID. King, P.B. 454 Great Smoky Mountains National Park, Tennessee and North Carolina. Trailside outcrop below Forney Ridge parking area just west of Clingmans Dome. Concretions in the Thunderhead Sandstone are spherical to irregular in coarse sandstone without directional fabric. Concretion on the right contains a slate chip near the center. 1949. Figure 9 (upper photo), U.S. Geological Survey Professional paper 349-C. #1:/King P.B. Collection/kpb00460 ID. King, P.B. 460 Specimen of Pigeon Siltstone from outcrop on Norton Creek. Shows characteristic thin light and dark sedimentary lamination. Scale in inches. Sevier County, Tennessee. 1957. #1:/Great Smoky Mountains National Park/kpb00461 ID. King, P.B. 461 Great Smoky Mountains National Park, Tennessee and North Carolina. Metcalf phyllite in a cut on Cades Cove Road on Laurel Creek immediately above the junction with West Prong Little River. Nearly vertical slip cleavage has distorted the earlier slaty cleavage into prominent chevron folds. Scale is 6 inches in length. Photo by W.B. Hamilton, 1953. Figure 16 (lower photo), U.S. Geological Survey Professional Paper 349-C. #1:/Devils Postpile National Monument/lah00003 ID. Lachenbruch, A.H. 3 Devils Postpile National Monument, California. Nonorthogonal contraction- crack polygons in basalt. Photo by G.W. Green. Figure 187.5, U.S. Geological Survey Professional Paper 400-B. #1:/Lassen Volcanic National Park/las00036 ID. Lassen Peak, no 36 Lassen Volcanic National Park, California. Crater on Mount Lassen, looking northwest. Several plumes are visible rising from crater. Photo by P.J. Thompson, 1914. #1:/Lupton C.T. Collection-Young and Young's Electric Mine/lct00106 ID. Lupton, C.T. 106 Tipple at Young and Young's electric mine about 10 miles northwest of Vernal in Sec. 11, T. 4 S., R. 20 E., Salt Lake Meridian. Uintah County, Utah. 1910. #1:/Lupton C.T. Collection-Young and Young's Electric Mine/lct00107 ID. Lupton, C.T. 107 Hoisting house and part of tipple at Young and Young's electric mine; location same as 106. Uintah County, Utah. 1910. #1:/Lupton C.T. Collection-Government Mine/lct00119 ID. Lupton, C.T. 119 Government mine in the SW 1/4, NE 1/4, Sec. 27, T. 3 S., R. 19 E., Uintah County, Utah. 1910. #1:/Lupton C.T. Collection-Cummings Coal Mine/lct00153 ID. Lupton, C.T. 153 E.J. Cummings coal mine (abandoned) in NW 1/4, SE 1/4, Sec. 31, T. 1 S., R. 10 W., Red Creek Peak in background. Wasatch County, Utah. 1910. #1:/Lupton C.T. Collection-Lost Josephine Mining Company/lct00170 ID. Lupton, C.T. 170 Lost Josephine Mining Company, Placer mine showing concentrator. Along Currant Creek, in Sec. 8, T.2 S., R.10W. Wasatch County, Utah. 1911. #1:/Lupton C.T. Collection-Williams Coal Mine/lct00226 ID. Lupton, C.T. 226 Williams coal mine, on coal bed 1. Muddy Creek, sec. 17, T. 22 S., R. 6 E., about 3 miles east of Emery. Emery County, Utah. 1911. Plate 11-A, in U.S. Geological Survey Bulletin 628. 1916. #1:/Lupton C.T. Collection/lct00244 ID. Lupton, C.T. 244 Smoke and vapor from a burning coal bed, about 4 miles southeast of Emery. Men and horses are near smoke. Emery County, Colorado. 1911. #1:/Lupton C.T. Collection-Casper Mine/lct00311 ID. Lupton, C.T. 311 Casper mine on coal bed C, about 4 miles southeast of Emery. Emery County, Utah. 1911. Plate 11-B in U.S. Geological Survey. Bulletin 628. 1916. #1:/Grand Canyon National Park/lct00441 ID. Lupton, C.T. 441 Grand Canyon National Park, Arizona. Navajo Hogan. 1913. #1:/Grand Canyon National Park/lct00442 ID. Lupton, C.T. 442 Grand Canyon National Park, Arizona. Hopi or Zuni village. 1913. #1:/Utah-Professional paper 164/lec00207 ID. LaRue, E.C. 207 Glen Canyon near mouth of Warm Springs Creek. The nearly vertical cliff is formed of Navajo sandstone. The Todilto (?) formation is exposed near the river level. Garfield County, Utah. October 3, 1921. Left part of this photo is plate 10-C in U.S. Geological Survey. Professional paper 164. 1931. #1:/Utah-Professional paper 164/lec00215 ID. LaRue, E.C. 215 Gold dredge on Colorado River near mouth of Hanson (Pine Alcove) Creek; installed in 1900 by R.L. Stanton. Garfield County, Utah. August 26, 1915. Plate 29-A in U.S. Geological Survey. Professional paper 164. 1931. #1:/Utah-Professional paper 164/lec00222 ID. LaRue, E.C. 222 Glen Canyon at Waterpocket Fold, the slabby sandstone at right is Todilto (?) formation. The Wingate and Chinle may be seen downstream. Garfield County, Utah. August 27, 1915. Plate 26-C in U.S. Geological Survey. Professional paper 164. 1931. #1:/Utah-Professional paper 164/lec00224 ID. LaRue, E.C. 224 Wall of Colorado River 8 miles above mouth of the Escalante; Wingate sandstone overlain by Todilto (?) formation, the cross bedding in the Wingate is not commonly so clearly shown. Garfield County, Utah. August 27, 1915. Plate 9-A in U.S. Geological Survey. Professional paper 164. 1931. #1:/Utah-Professional paper 164/lec00227 ID. LaRue, E.C. 227 Oil seep on bank of Colorado River at "Bennett's Oil fields". Garfield County, Utah. August 27, 1915. Plate 31-B in U.S. Geological Survey. Professional paper 164. 1931. #1:/Rainbow Bridge National Monument/lec00233 ID. LaRue, E.C. 233 Rainbow Bridge National Monument, Utah. Rainbow Bridge, looking down stream at noon. October 6, 1921. #1:/Arizona-Professional paper 164/lec00277 ID. LaRue, E.C. 277 Colorado River from a pinnacle above Lees Ferry, looking south and east; left, bare Navajo sandstone; Navajo Mountain in distance (277). Right center, monoclinal fold (Echo Cliffs), exposing Chinle, Right, Navajo, Shinarump, and Kaibab terraces; head of Marble Canyon. Larue 277, 278 and 279 form this panorama. Coconino County, Arizona. August 1, 1921. Plate 21-C, in U.S. Geological Survey. Professional paper 164. 1931. #1:/Arizona-Professional paper 164/lec00278 ID. LaRue, E.C. 278 Colorado River from a pinnacle above Lees Ferry, looking south and east; left, bare Navajo sandstone; Navajo Mountain in distance (277). Right center, monoclinal fold (Echo Cliffs), exposing Chinle, Right, Navajo, Shinarump, and Kaibab terraces; head of Marble Canyon. Larue 277, 278 and 279 form this panorama. Coconino County, Arizona. August 1, 1921. Plate 21-C, in U.S. Geological Survey. Professional paper 164. 1931. #1:/Arizona-Professional paper 164/lec00279 ID. LaRue, E.C. 279 Colorado River from a pinnacle above Lees Ferry, looking south and east; left, bare Navajo sandstone; Navajo Mountain in distance (277). Right center, monoclinal fold (Echo Cliffs), exposing Chinle, Right, Navajo, Shinarump, and Kaibab terraces; head of Marble Canyon. Larue 277, 278 and 279 form this panorama. Coconino County, Arizona. August 1, 1921. Plate 21-C, in U.S. Geological Survey. Professional paper 164. 1931. #1:/Grand Canyon National Park/lec00294 ID. LaRue, E.C. 294 Grand Canyon National Park, Arizona. Lees Ferry, viewed from the left bank. This point on the Colorado River derives its name from a renegade Mormon who, after eluding officers of the law, cultivated a fertile patch of ground here. He was eventually captured, tried and executed as the instigator of the Mountain Meadows Massacre. The voyage from Lees Ferry to Needles, where the party disbanded, required 80 days. Colorado River Survey of 1923 (Birdseye). #1:/Arizona-Professional paper 164/lec00296 ID. LaRue, E.C. 296 Steamboat "Charles H. Spencer" constructed to transport coal from Warm Creek to Lees Ferry for placer mining. Coconino County, Arizona. August 1915. Plate 29-B in U.S. Geological Survey. Professional paper 164. 1931. #1:/Arizona-Professional paper 164/lec00306 ID. LaRue, E.C. 306 Marble Gorge; looking downstream 12 miles north of Lees Ferry. Coconino County, Arizona. May 9, 1921. Middle portion of this photograph is plate 6-A in U.S. Geological Survey. Professional paper 164. 1931. #1:/Grand Canyon National Park/lec00321 ID. LaRue, E.C. 321 Grand Canyon National Park, Arizona. The boat "Marble" being soaked, ready for the trip through the Grand Canyon. This, one of the three boats loaned to the expedition, had been exposed to sun and dry air for two years. It had to be thoroughly reconditioned. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00336 ID. LaRue, E.C. 336 Grand Canyon National Park, Arizona. The boat "Marble," beached for repairs after running Badger Creek Rapid. The bottom of the pathfinding boat was punctured in the first rapid negotiated by the expedition, but the damage was quickly repaired. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00342 ID. LaRue, E.C. 342 Grand Canyon National Park, Arizona. The boat "Boulder" being skidded over the rocks at the head of Soap Creek Rapid. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00353 ID. LaRue, E.C. 353 Grand Canyon National Park, Arizona.U.S. Geological Survey team camped on the right bank, 34.6 kilometers below Lees Ferry. A portion of the Pennsylvanian and Lower Permian Supai Group is here exposed at the upper right. The stick in the foreground is a mast for a radio antenna. The conspicuous plants on the sandy knoll behind the four men are probably wire lettuce and spiny aster. On the opposite bank, a discontinuous line of shrubs, probably Apache plume, marks the level of maximum river stage. Altitude is 907 meters. A boat is visible at near shore. August 6, 1923. Colorado River Survey of 1923 (Birdseye). Figure 38-A, U.S. Geological Survey Professional Paper 1132. #1:/Grand Canyon National Park/lec00362 ID. LaRue, E.C. 362 Grand Canyon National Park, Arizona. The canvas boat "Mojave" was wrecked in Cave Rapid. Only one oarlock and some kindling wood were salvaged after the frail craft smashed on the rocks. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00379 ID. LaRue, E.C. 379 Grand Canyon National Park, Arizona. Marble Canyon, looking downstream. Large cave on the left. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00390 ID. LaRue, E.C. 390 Grand Canyon National Park, Arizona. Taken from the top of a talus slope on the right bank a short distance above Triple Alcoves, 74.8 kilometers below Lees Ferry. The vertical outcrops with conspicuous bedding in the right foreground are the Middle Cambrian Muav Limestone. The Mississippian Redwall Limestone forms the vertical cliffs above the right bank. A few logs of driftwood can be seen along the upper part of the boulder-strewn beach. Elsewhere on the beach, there are no signs of plants. Altitude is 858 meters. Boat near center bottom. Colorado River Survey of 1923 (Birdseye). Portion of Figure 43-A, U.S. Geological Survey Professional Paper 1132. #1:/Grand Canyon National Park/lec00392 ID. LaRue, E.C. 392 Grand Canyon National Park, Arizona.E.C. LaRue measuring the discharge of Nankoweap Creek. Every stream adjoining the Colorado River in the Grand Canyon region was measured. August 12, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00393 ID. LaRue, E.C. 393 Grand Canyon National Park, Arizona. Marble Canyon, viewed from the right bank at the mouth of Nankoweap Creek. August 12, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00394 ID. LaRue, E.C. 394 Grand Canyon National Park, Arizona. Upstream from the left bank, looking across the Colorado River towards the mouth of Nankoweap Creek and Little Nankoweap Creek. August 12, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00395 ID. LaRue, E.C. 395 Grand Canyon National Park, Arizona. Cliff dwellings 600 feet above the river, on the north wall near Nankoweap Creek, below the mouth of the Little Colorado River. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00398 ID. LaRue, E.C. 398 Grand Canyon National Park, Arizona. Junction of the Colorado River and the Little Colorado River, viewed from the right bank 400 feet above the river. The Colorado River flows from right to left in the foreground. August 13, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00399 ID. LaRue, E.C. 399 Grand Canyon National Park, Arizona. Looking up the canyon of the Little Colorado River from point on the wall on the right bank of the Colorado River. August 13, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00400 ID. LaRue, E.C. 400 Grand Canyon National Park, Arizona. Junction of the Little Colorado River and the Colorado River. The Little Colorado marks the end of Marble Canyon and the beginning of the Grand Canyon. The Colorado River flows from left to right in the foreground. August 13, 1923. Colorado River Survey of 1923 (Birdseye). Plate 21-A, U. S, Geological Survey Water-Supply Paper 556. #1:/Grand Canyon National Park/lec00403 ID. LaRue, E.C. 403 Grand Canyon National Park, Arizona. A hard berth. The water has carved oddly shaped recesses in the limestone which forms the wall 1 mile below the mouth of the Little Colorado River.E.C. LaRue in the photograph. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00406 ID. LaRue, E.C. 406 Grand Canyon National Park, Arizona. Upstream view of the Grand Canyon from a point four miles below the Little Colorado River, opposite Lava Canyon. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00407 ID. LaRue, E.C. 407 Grand Canyon National Park, Arizona. Downstream view of the Grand Canyon from the left bank opposite Lava Canyon 4 miles below the Little Colorado River. Colorado River Survey of 1923 (Birdseye). August 14, 1923. #1:/Grand Canyon National Park/lec00408 ID. LaRue, E.C. 408 Grand Canyon National Park, Arizona. Looking across the Colorado River from a point on the left bank 308 miles below the Little Colorado River. Lava Canyon on the left. Colorado River Survey of 1923 (Birdseye). August 14, 1923. #1:/Grand Canyon National Park/lec00409 ID. LaRue, E.C. 409 Grand Canyon National Park, Arizona. Looking across the Colorado River into Lava Canyon 4 miles below the Little Colorado River. August 14, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00411 ID. LaRue, E.C. 411 Grand Canyon National Park, Arizona. Upstream from the right bank 12.5 miles below the Little Colorado River. August 15, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00412 ID. LaRue, E.C. 412 Grand Canyon National Park, Arizona. Downstream view of the Grand Canyon from the right bank 12.5 miles below the Little Colorado River. August 15, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00413 ID. LaRue, E.C. 413 Grand Canyon National Park, Arizona. Downstream view, showing the shale formation at the water's edge in the narrow gorge 1 mile above Hance Rapids. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00415 ID. LaRue, E.C. 415 Grand Canyon National Park, Arizona. Downstream view of Granite Gorge at Mineral Canyon (dam site no. 4), 16.5 miles below the Little Colorado River. August 18, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00419 ID. LaRue, E.C. 419 Grand Canyon National Park, Arizona. Downstream view of Mineral Canyon (dam site no. 4) located in Granite Gorge 16.5 miles below the Little Colorado River. August 18, 1923. Colorado River Survey of 1923 (Birdseye). Plate 29-A, U.S. Geological Survey Water-Supply Paper 556. #1:/Grand Canyon National Park/lec00421 ID. LaRue, E.C. 421 Grand Canyon National Park, Arizona. Emery Kolb in the boat "Marble" running the Sockdologer Rapid. August 21, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00423 ID. LaRue, E.C. 423 Grand Canyon National Park, Arizona. Looking up canyon of Hance Creek from the head of Sockdologer Rapid. October 21, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00424 ID. LaRue, E.C. 424 Grand Canyon National Park, Arizona. Upstream view of Granite Gorge from a point on the right bank half a mile below the head of Grapevine Rapid. August 22, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00427 ID. LaRue, E.C. 427 Grand Canyon National Park, Arizona. Dam site about half a mile below the Clear Creek dam site. August 23, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00428 ID. LaRue, E.C. 428 Grand Canyon National Park, Arizona. Dam site in Granite Gorge 1 mile below the mouth of Clear Creek or 2.5 miles above Bright Angel Creek. August 23, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00430 ID. LaRue, E.C. 430 Grand Canyon National Park, Arizona. Downstream view of dam site no. 7 located 2.5 miles above Bright Angel Creek. August 23, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00432 ID. LaRue, E.C. 432 Grand Canyon National Park, Arizona. Left wall of dam site 2.5 miles above Bright Angel Creek, showing solid granite formation capped by Tapeats Sandstone. August 23, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00434 ID. LaRue, E.C. 434 Grand Canyon National Park, Arizona. Dam site no. 6 in Granite Gorge 23.8 miles below the Little Colorado River. Water level at 2450. August 23, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00435 ID. LaRue, E.C. 435 Grand Canyon National Park, Arizona. Downstream view of Granite Gorge, showing dam site no. 7 located 24.7 miles below the Little Colorado River. Water level at 2440. August 23, 1923. Colorado River Survey of 1923 (Birdseye). Plate 35-B, U.S. Geological Survey Water-Supply Paper 556. #1:/Grand Canyon National Park/lec00436 ID. LaRue, E.C. 436 Grand Canyon National Park, Arizona. Side canyon on the right bank just above dam site no.6, which is 23.8 miles below the Little Colorado River. August 23, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00438 ID. LaRue, E.C. 438 Grand Canyon National Park, Arizona.U.S. Geological Survey gaging station in the foreground and the Kaibab suspension bridge about half a mile above Bright Angel Creek. August 26, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00439 ID. LaRue, E.C. 439 Grand Canyon National Park, Arizona. Looking up lower Granite Gorge from the mouth of Bright Angel Creek, showing Bright Angel suspension bridge, which is 500 feet long and hangs 60 feet above normal flow. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00440 ID. LaRue, E.C. 440 Grand Canyon National Park, Arizona. Kaibab suspension bridge, viewed from a point in the side canyon on the left bank about 400 feet above the river. August 26, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00442 ID. LaRue, E.C. 442 Grand Canyon National Park, Arizona. Upstream view of the Grand Canyon from the right bank just below Bright Angel Creek.U.S. Geological Survey cabin in the foreground. Kaibab suspension bridge in the background. August 26, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00444 ID. LaRue, E.C. 444 Grand Canyon National Park, Arizona. Up the canyon of Bright Angel Creek, showing the Phantom Ranch. August 26, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00445 ID. LaRue, E.C. 445 Grand Canyon National Park, Arizona. Bright Angel suspension bridge, viewed upstream from the north bank. August 27, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00447 ID. LaRue, E.C. 447 Grand Canyon National Park, Arizona. Pet lizard of the U.S. Geological Survey hydraulic engineer who measures the discharge of the Colorado at Bright Angel keeps the insects busy. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00449 ID. LaRue, E.C. 449 Grand Canyon National Park, Arizona. Downstream from the left bank, showing the dam site at the mouth of Pipe Creek which enters at the left. August 28, 1923. Colorado River Survey of 1923 (Birdseye). Plate 39-A, U.S. Geological Survey Water-Supply paper 556. #1:/Grand Canyon National Park/lec00450 ID. LaRue, E.C. 450 Grand Canyon National Park, Arizona. Downstream from the left bank just above the mouth of Pipe Creek dam site no.8. Water level at 2,405. August 28, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00451 ID. LaRue, E.C. 451 Grand Canyon National Park, Arizona. Downstream view, showing canyon of Pipe Creek in the foreground. The Colorado River and dam site on the right. Spillway saddle at left center. August 28, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00452 ID. LaRue, E.C. 452 Grand Canyon National Park, Arizona. Upstream from the right bank, showing the Pipe Creek dam site with spillway saddle on the sky line on the right. August 28, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00453 ID. LaRue, E.C. 453 Grand Canyon National Park, Arizona. Looking up the canyon of Pipe Creek. August 28, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00454 ID. LaRue, E.C. 454 Grand Canyon National Park, Arizona. Looking down the Grand Canyon from a point on the left bank one-half mile below the Pipe Creek dam site. August 28, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00456 ID. LaRue, E.C. 456 Grand Canyon National Park, Arizona. Leigh Lint in the boat "Boulder" in Hermit Creek Rapids. August 30, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00457 ID. LaRue, E.C. 457 Grand Canyon National Park, Arizona. Downstream view of the Grand Canyon from a point on the left bank at Hermit Creek Rapid. Electrical storm crossing the canyon below. August 28, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00458 ID. LaRue, E.C. 458 Grand Canyon National Park, Arizona. Downstream from the left bank at the mouth of Hermit Creek, showing radio "set-up". Large boulders in the foreground. August 29, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00459 ID. LaRue, E.C. 459 Grand Canyon National Park, Arizona. Upstream view of the Grand Canyon from the left bank, at the mouth of Boucher Creek, about 9 miles below Bright Angel Creek. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00460 ID. LaRue, E.C. 460 Grand Canyon National Park, Arizona. Downstream view of the Grand Canyon from the right bank at a point 1,000 feet above the mouth of Crystal Creek, about 11 miles below Bright Angel Creek. August 30, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00462 ID. LaRue, E.C. 462 Grand Canyon National Park, Arizona. Upstream view of Crystal Creek from the Colorado River. Estimated flow of 2 cubic feet per second. August 30, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00464 ID. LaRue, E.C. 464 Grand Canyon National Park, Arizona. The survey carried to the head of Crystal Creek Rapid in the Grand Canyon. Left to right: C.H. Birdseye and R.W. Burchard. August 30, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00465 ID. LaRue, E.C. 465 Grand Canyon National Park, Arizona. The survey carried to the head of Crystal Creek Rapid in the Grand Canyon. Left to right: C.H. Birdseye and R.W. Burchard. August 30, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00469 ID. LaRue, E.C. 469 Grand Canyon National Park, Arizona. Upstream view of the Grand Canyon, showing a possible dam site above the mouth of Tuna Creek. Canyon of Tuna Creek on the left. August 31, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00475 ID. LaRue, E.C. 475 Grand Canyon National Park, Arizona. Downstream, showing dam site no. 9, 41.9 miles below the Little Colorado River. The dam site is at the lower end of the rapid between the two side canyons shown on the right. September 1, 1923. Colorado River Survey of 1923 (Birdseye). Plate 29-B, U.S. Geological Survey Water-Supply Paper 556. #1:/Grand Canyon National Park/lec00476 ID. LaRue, E.C. 476 Grand Canyon National Park, Arizona. Upstream of dam site no.9. September 1, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00477 ID. LaRue, E.C. 477 Grand Canyon National Park, Arizona. East from the right bank 600 feet above the river and half a mile above Bass Trail Crossing. Wallace Butte and Tyndal Dome on the skyline. September 2, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00479 ID. LaRue, E.C. 479 Grand Canyon National Park, Arizona. Across the canyon of the Colorado River from a point on the right bank half a mile above Bass Trail crossing. Tyndall Dome and Wallace Butte on the skyline in the center. September 2, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00484 ID. LaRue, E.C. 484 Grand Canyon National Park, Arizona. Downstream view of dam site no. 10 at Lower Bass Cable 48.8 miles below the Little Colorado River. September 4, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00485 ID. LaRue, E.C. 485 Grand Canyon National Park, Arizona. Upstream view, showing the left abutment of dam site no. 10. Note the cable car about 200 feet above the river. September 4, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00486 ID. LaRue, E.C. 486 Grand Canyon National Park, Arizona. Downstream view, showing the canyon at the mouth of Hakatai Creek. Cable in the left corner is the Lower Bass Cable. Dam site no. 10 is located just above the cable crossing, 48.8 miles below the Little Colorado River. September 4, 1923. Colorado River survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00487 ID. LaRue, E.C. 487 Grand Canyon National Park, Arizona. Upstream from the right bank, showing Hakatai Creek on the left and dam site no. 10 on the right. Colorado River Survey of 1923 (Birdseye). Plate 39-B, U.S. Geological Survey Water-Supply Paper 556. #1:/Grand Canyon National Park/lec00488 ID. LaRue, E.C. 488 Grand Canyon National Park, Arizona. Upstream view, showing the left abutment of dam site no. 10. Cable car which is about 200 feet above the river. Boats are visible on the left. September 4, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00492 ID. LaRue, E.C. 492 Grand Canyon National Park, Arizona. Grand Canyon, looking downstream from a point on the right bank just above the mouth of Walthenberg Creek. Geologists in the middle distance on the bank. September 4, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00493 ID. LaRue, E.C. 493 Grand Canyon National Park, Arizona. Upstream from the right bank at the mouth of Walthenberg Creek. Geologists on the bank. September 4, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00496 ID. LaRue, E.C. 496 Grand Canyon National Park, Arizona. Downstream view of the Grand Canyon from a point on the left bank about a quarter of a mile above the mouth of Walthenberg Creek. September 5, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00498 ID. LaRue, E.C. 498 Grand Canyon National Park, Arizona. Upstream view of the Grand Canyon, showing Walthenberg Rapids. September 5, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00499 ID. LaRue, E.C. 499 Grand Canyon National Park, Arizona. Upstream from the right bank, showing a possible dam site, 51.5 miles below the Little Colorado River. September 5, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00500 ID. LaRue, E.C. 500 Grand Canyon National Park, Arizona. Upstream from the right bank, showing a possible dam site (dam site no. 11), 51.5 miles below the Little Colorado River. September 5, 1923. Colorado River Survey of 1923 (Birdseye). Plate 41-A, U.S. Geological Survey Water-Supply Paper 556. #1:/Grand Canyon National Park/lec00503 ID. LaRue, E.C. 503 Grand Canyon National Park, Arizona. Upstream view of the Grand Canyon from a point on the left bank about 400 feet above the river and about 500 feet below Garnet Creek. September 5, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00504 ID. LaRue, E.C. 504 Grand Canyon National Park, Arizona. Downstream view of the canyon of the Colorado River from a point on the left bank about 400 feet above the river and about 500 feet below Garnet Creek. September 5, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00513 ID. LaRue, E.C. 513 Grand Canyon National Park, Arizona. Downstream view of the Grand Canyon from a point on the right bank about 64 miles below the Little Colorado River or 4 miles above Specter Chasm. September 6, 1923. Colorado River Survey of 1923 (Birdseye). Plate 77-B, U.S. Geological Survey Water-Supply Paper 556. #1:/Grand Canyon National Park/lec00520 ID. LaRue, E.C. 520 Grand Canyon National Park, Arizona. Upstream view of a rapid 5 miles above the mouth of Tapeats Creek. The boat "Grand" collided with a boulder in this rapid. An incipient leak was effectually closed with a patch of canvas and some white lead. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00525 ID. LaRue, E.C. 525 Grand Canyon National Park, Arizona. Downstream from the right bank, showing dam site no. 13, 68.1 miles below the Little Colorado River and about 1 mile below Specter Chasm. September 7, 1923. Colorado River Survey of 1923 (Birdseye). Plate 32-B, U.S. Geological Survey Water-Supply Paper 556. #1:/Grand Canyon National Park/lec00527 ID. LaRue, E.C. 527 Grand Canyon National Park, Arizona. Upstream view of dam site no. 13 which is located 68.1 miles below the Little Colorado River. September 7, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00531 ID. LaRue, E.C. 531 Grand Canyon National Park, Arizona. Looking up a vertical-walled side canyon on the left bank, 0.7-mile above Tapeates Creek. September 8, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00532 ID. LaRue, E.C. 532 Grand Canyon National Park, Arizona. Upstream view of canyon walls 1 mile above Tapeates Creek, viewed from the left bank. September 7, 1923. Colorado River Survey of 1923 (Birdseye). Plate 78-A, U.S. Geological Survey Water- Supply Paper 556. #1:/Grand Canyon National Park/lec00534 ID. LaRue, E.C. 534 Grand Canyon National Park, Arizona. Radio messages came in clear at all points in the Grand Canyon where the outfit was set up.H. Stabler and C.H. Birdseye are listening in at Tapeats Creek. At El Tovar, the leader of the expedition sent a telegram to Washington announcing that the party was safe; two hours later, in the depths of the canyon, he heard by radio his own message, as it was broadcast to the country. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00538 ID. LaRue, E.C. 538 Grand Canyon National Park, Arizona. Into the gorge of Tapeates Creek from a point about half a mile above its mouth. September 9, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00540 ID. LaRue, E.C. 540 Grand Canyon National Park, Arizona. Tapeates Creek, about 1.5 miles above its mouth. Discharge of 93 cubic feet per second. September 9, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00541 ID. LaRue, E.C. 541 Grand Canyon National Park, Arizona. Tapeates Creek, about 1 mile above its mouth. September 9, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00543 ID. LaRue, E.C. 543 Grand Canyon National Park, Arizona. Upstream view of the upper end of the narrow gorge through which Tapeates Creek discharges into the Colorado River. September 9, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00544 ID. LaRue, E.C. 544 Grand Canyon National Park, Arizona. Deer Creek Falls on the right bank about 75 miles below the Little Colorado River. Dr.R.C. Moore on the left. September 10, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00545 ID. LaRue, E.C. 545 Grand Canyon National Park, Arizona.E.C. LaRue measuring the discharge of Deer Creek immediately below the falls. Discharge of 8.21 cubic feet per second. September 10, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00546 ID. LaRue, E.C. 546 Grand Canyon National Park, Arizona. The water in Deer Creek plunges more than 30 meters through a slot cut in the Lower and Middle Cambrian Tapeats Sandstone just before entering the Colorado River, 219.1 kilometers below Lees Ferry. Angular blocks from the cliff face above lie on the banks of the river. The Colorado River flows from right to left. Altitude is 588 meters. September 10, 1923. Colorado River Survey of 1923 (Birdseye). Figure 56-A, U.S. Geological Survey Professional Paper 1132. #1:/Grand Canyon National Park/lec00551 ID. LaRue, E.C. 551 Grand Canyon National Park, Arizona. Upstream view of the canyon from a point on the left bank opposite Fishtail Canyon about 5 miles below Tapeats Creek. September 10, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00556 ID. LaRue, E.C. 556 Grand Canyon National Park, Arizona. Up the canyon of Kanab Creek from a point about 0.75 mile above its mouth. September 11, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00558 ID. LaRue, E.C. 558 Grand Canyon National Park, Arizona. Downstream view of the canyon of Kanab Creek from a point about 1 mile above its mouth. September 11, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00561 ID. LaRue, E.C. 561 Grand Canyon National Park, Arizona. Downstream view of the Grand Canyon from the left bank at a point 88 miles below the Little Colorado River. Navigation was comparatively easy in this stretch of the river, and from the mouth of the Little Colorado to the mouth of Havasu Creek, the expedition was usually 3 or 4 days ahead of schedule, making from 5 to 10 miles a day compared with 3 or 4 in Marble Canyon. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00563 ID. LaRue, E.C. 563 Grand Canyon National Park, Arizona. Big bend in the Grand Canyon at mile 91 below the Little Colorado River near Markatamiba Rapid. September 12, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00569 ID. LaRue, E.C. 569 Grand Canyon National Park, Arizona. Narrow gorge of Havasu Creek. September 13, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00570 ID. LaRue, E.C. 570 Grand Canyon National Park, Arizona. Grand Canyon 1.5 miles above Havasu Creek. This is near the west boundary of the park. Note the "face" in the notch of the canyon wall. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00571 ID. LaRue, E.C. 571 Grand Canyon National Park, Arizona. Upstream view of the Grand Canyon at the west boundary of the Colorado River. Havasu Creek enters on the right. September 14, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00577 ID. LaRue, E.C. 577 Grand Canyon National Park, Arizona. Havasu Creek, looking downsteam, with the Colorado River in the background. Framed between the overhanging walls is the boat "Boulder" ready to land for supplies. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00582 ID. LaRue, E.C. 582 Grand Canyon National Park, Arizona. Where wood cuts stone. A willow log 6 inches in diameter has eaten into a hard limestone boulder, 4 miles below the mouth of Havasu Creek. The log was not worn, which demonstrates that the water acts as a cushion, protecting the wood, while the silt in the water does the cutting. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00590 ID. LaRue, E.C. 590 Grand Canyon National Park, Arizona. Down Fern Glen Canyon which joins the Grand Canyon on the right bank, 11 miles below the mouth of Havasu Creek. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00604 ID. LaRue, E.C. 604 Grand Canyon National Park, Arizona. Flood at Lava Falls. The party was taken unaware at a point far from favorable. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00628 ID. LaRue, E.C. 628 Grand Canyon National Park, Arizona. Taken from the left bank 313.6 kilometers below Lees Ferry. A Quaternary basalt flow is seen at river level on the right. The canyon of the Colorado River is broad enough here so that the scouring action of flood waters is dampened and some perennial plants became established in the alluvium near the river. A flood, six days earlier, overtook the U.S. Geological Survey crew at Lava Falls, 25.1 kilometers upstream from here, and the river stage increased 6.7 meters. The signs of recent wave action high on the beach probably stem from the same flood. Several plants such as the tree (Fremont cottonwood or willow) at right midground, desertbroom (left foreground), and what is probably saltbush (near the men on the beach near the center) withstood these floodwaters. Altitude is 471 meters. September 25, 1923. Colorado River Survey of 1923 (Birdseye). Portion of Figure 60-A, U.S. Geological Survey Professional Paper 1132. #1:/Grand Canyon National Park/lec00629 ID. LaRue, E.C. 629 Grand Canyon National Park, Arizona. The men at play 40 miles below the mouth of Havasu Creek, while waiting for the engineers to complete a side canyon survey. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00633 ID. LaRue, E.C. 633 Grand Canyon National Park, Arizona. Taken from a point just above Spring Canyon, 328.9 kilometers below Lees Ferry. The Middle Cambrian Bright Angel Shale, mostly covered by slope wash, is at river level. A well-developed community occurs above the flood line on both sides of the river. At the present river stage, a large bar, unoccupied by plants, is exposed. Altitude is 454 meters. Colorado River Survey of 1923 (Birdseye). Portion of Figure 61-A, U.S. Geological Survey Professional Paper 1132. #1:/Grand Canyon National Park/lec00643 ID. LaRue, E.C. 643 Grand Canyon National Park, Arizona. Taken from a point 168 meters above the Colorado River and shows Granite Park, 336 kilometers below Lees Ferry. A flood-line community is strongly developed along this section of the canyon. Some trees have become established at the edge of the river, a habitat that is here more stable than usual because of the great width of the valley floor. Altitude is 442 meters. Colorado River Survey of 1923 (Birdseye). Portion of Figure 64-A, U.S. Geological Survey Professional Paper 1132. #1:/Grand Canyon National Park/lec00653 ID. LaRue, E.C. 653 Grand Canyon National Park, Arizona. Taken at kilometer 350.3 from a station just below the mouth of Two Hundred and Seventeenmile Canyon and only a short distance into the Lower Granite Gorge. Except where sediment has entered the canyon from tributaries, there are few sand or gravel shores within the Lower Granite Gorge, so steeply have the Precambrian rocks eroded to river level. Even where substrate exists for riparian communities, as on the foreground debris fan, the narrowly defined valley tends to increase the depth of flood waters making these habitats on the steep slopes above the river. Altitude is 424 meters. September 30, 1923. Colorado River Survey of 1923 (Birdseye). Portion of Figure.65-A, U.S. Geological Survey Professional Paper 1132. #1:/Grand Canyon National Park/lec00660 ID. LaRue, E.C. 660 Grand Canyon National Park, Arizona. Downstream view of the canyon of the Colorado River from the left bank, 65.6 miles below Havasu Creek or 3.4 miles above Diamond Creek, showing Diamond Peak. October 1, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00664 ID. LaRue, E.C. 664 Grand Canyon National Park, Arizona. Members of Powell's second river expedition found quartz crystals on an ant hill near the pyramid-shaped peak at the center, and the peak became known as Diamond Peak. The valley is broad through this section of the Lower Granite Gorge, and alluvial deposits are common. There is a single plant on the left on the far side of the gravel bar in this downstream view taken 358.1 kilometers below Lees Ferry. The plant's identity is uncertain, but it appears bent over, perhaps from the same flood of a few days earlier that overtook the U.S. Geological Survey team at Lava Falls. The floodline community is conspicuous; in the foreground, a large willow can be seen. Altitude is 41.3 meters. October 1, 1923. Colorado River Survey of 1923 (Birdseye). Figure 66-A, U.S. Geological Survey Professional Paper 1132. #1:/Grand Canyon National Park/lec00665 ID. LaRue, E.C. 665 Grand Canyon National Park, Arizona. Down the V-shaped canyon cut through Precambrian metamorphic rocks. The stratified formation capping the Precambrian rocks is the Lower and Middle Cambrian Tapeats Sandstone. The far skyline is defined by a formation of the Pennsylvanian and Permian Supai Group. The sand deposit in the foreground and the one across the river are both at the mouths of minor tributary canyons 360.7 kilometers below Lees Ferry. A flood line is apparent from stains on the rocks of the opposite shore, and no plants are visible below that level. Altitude is 408 meters. October 2, 1923. Colorado River Survey of 1923 (Birdseye). Figure 67-A, U.S. Geological Survey Professional Paper 1132. #1:/Grand Canyon National Park/lec00675 ID. LaRue, E.C. 675 Grand Canyon National Park, Arizona. Diamond Creek enters the Colorado River 363.2 kilometers below Lees Ferry and is the first place in that distance where vehicles can reach the river. The mouth of Diamond Creek was visited by Ives and his party in 1858 and was the terminus of the Wheeler Expedition in 1871. The Diamond Creek Hotel was in operation here for sightseers from 1884 to 1889 before scenic areas farther east were developed. In this upstream view, the only plant at the river's edge is a large tree visible on the opposite bank in a protected area below a bar. Large plants on the fan at the mouth of Diamond Creek (right midground) are probably mesquites. On the uppermost sandy terrace of the fan a dense growth of small shrubs is evident. Altitude is 407 meters. September 22, 1923. Colorado River Survey of 1923 (Birdseye). Portion of Figure 69-A, U.S. Geological Survey Professional Paper 1132. #1:/Grand Canyon National Park/lec00683 ID. LaRue, E.C. 683 Grand Canyon National Park, Arizona. Saved from the flood. The boat "Marble" drawn up 21 feet above the river after the high waters of September 18 had receded. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00688 ID. LaRue, E.C. 688 Grand Canyon National Park, Arizona. Downstream view of a possible dam site located 3 miles below Diamond Creek. October 7, 1923. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00700 ID. LaRue, E.C. 700 Grand Canyon National Park, Arizona. Travertine Falls, 5 miles below the mouth of Diamond Creek. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00746 ID. LaRue, E.C. 746 Grand Canyon National Park, Arizona. Time out for lunch on a narrow ledge 26 miles below the mouth of Diamond Creek. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00771 ID. LaRue, E.C. 771 Grand Canyon National Park, Arizona. Upstream toward the west portal of the Grand Canyon. Note the ruins of the old stone house in the foreground. This was once one of the buildings at Pierce (Pearce) Ferry, where a wagon trail from Kingman to Moapa crossed the river. Colorado River Survey of 1923 (Birdseye). #1:/Lake Mead National Recreation Area/lec00788 ID. LaRue, E.C. 788 Lake Mead National Recreation Area, Nevada. The "Temple," a butte of conglomerate above the mouth of the Virgin River. The Virgin River enters the Colorado just above the point where the major stream makes its final sharp right angle turn, flowing due south. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/lec00790 ID. LaRue, E.C. 790 Grand Canyon National Park, Arizona. Sailing in the quiet waters of Black Canyon below Diamond Creek. Colorado River Survey of 1923 (Birdseye). #1:/Mesa Verde National Park/lec00796 ID. LaRue, E.C. 796 Mesa Verde National Park, Colorado. Spruce Tree House is about 216 feet long and 89 feet wide, contains 114 rooms and 8 ceremonial chambers or kivas. It has been estimated that about 400 persons were housed in this structure. Circa 1920. #1:/Aztec Ruins National Monument/lec00797 ID. LaRue, E.C. 797 Aztec Ruins National Monument, New Mexico. Aztec ruins on the west bank of the Animas River. Circa 1920. #1:/Mesa Verde National Park/lec00798 ID. LaRue, E.C. 798 Mesa Verde National Park, Colorado. Dams in Mesa Verde National Park built by prehistoric people. Circa 1920. #1:/Mesa Verde National Park/lec00799 ID. LaRue, E.C. 799 Mesa Verde National Park, Colorado. Dams in Mesa Verde National Park built by prehistoric people. Circa 1920. #/Lake Mead National Recreation Area/lec00829 ID. LaRue, E.C. 829 Lake Mead National Recreation Area, Nevada. Boulder Canyon dam site (Hoover Dam), showing barges used in diamond drill work. Plate 9-A, U.S. Geological Survey Water-Supply Paper 556. #1:/LaRue E.C. Collection-Yellowstone National Park/lec01082 ID. LaRue, E.C. 1082 Old Faithful Geyser, Upper Geyser Basin, Yellowstone National Park, Wyoming. August 1909. #1:/LaRue E.C. Collection-Yellowstone National Park/lec01086 ID. LaRue, E.C. 1086 Old Faithful Geyser and Faithful Inn in Upper Geyser Basin, Yellowstone National Park, Wyoming. August 1909 #1:/Yellowstone National Park/lec01088 ID. LaRue, E.C. 1088 Yellowstone National Park, Wyoming. Old Faithful Inn in Upper Geyser Basin. August 1909. #1:/Yellowstone National Park/lec01099 ID. LaRue, E.C. 1099 Yellowstone National Park, Wyoming. Small geyser at the south end of Yellowstone Lake. August 1909. #1:/Grand Canyon National Park/lec01325 ID. LaRue, E.C. 1325 Grand Canyon National Park, Arizona. El Tovar Hotel. April 1918. #1:/Larsen E.S. Collection-Amethyst Mine-Last Chance Mine/les00059 ID. Larsen, E.S. 59 Looking down West Willow Terrace road, Amethyst and Last Chance mines at 10,700 ft., on point of ridge between Nelson and West Willow, Mineral County, Colorado. July 30, 1912. #1:/Larsen E.S. Collection-Last Chance Mine/les00060 ID. Larsen, E.S. 60 Looking at Last Chance Mine, from 10,700 ft., on point of ridge between Nelson and West Willow. Mineral County, Colorado. July 30, 1912. #1:/Larsen E.S. Collection/les00061 ID. Larsen, E.S. 61 On point of ridge between Nelson and West Willow, looking at Regent, shows the amethyst fault in line with the mines, the upper glaciated valley terminal moraine and lower canyon of the West Willow Creek. Hinsdale County, Colorado. July 30,1912. #1:/Larsen E.S. Collection/les00076 ID. Larsen, E.S. 76: Bench 20 feet above West Willow to west and on line of Equity fault. Looking at Equity fault. Creede Special quadrangle, Mineral County, Colorado. September 6, 1912. #1:/Bandelier National Monument/les00356 ID. Larsen, E.S. 356 Bandelier National Monument, New Mexico. Ruins in Frijoles Canyon, viewed from the cliffs to the north. June 16, 1920. #1:/Bandelier National Monument/les00358 ID. Larsen, E.S. 358 Bandelier National Monument, New Mexico. Looking east across the ruins in Frijoles Canyon. Santa Fe Formations with overlying basalt in the background. June 16, 1920. #1:/Bandelier National Monument/les00360 ID. Larsen, E.S. 360 Bandelier National Monument, New Mexico. Upper Frijoles Falls, showing rhyolite butting against basalt cliffs in the background. June 16, 1920. #1:/Tokyo and Yokohama, Japan, Earthquake 1923/lga00004 ID. George A. Lang Collection. 4 Tokyo and Yokohama, Japan, Earthquake 1923. "A good idea of the tremendous devastation in Tokyo wrought by earthquake and fire. Enclosed find a few snaps taken on the top of the Imperial Hotel in Tokyo which is the only hotel in the earthquake district that survived." J.H. Messervey, letter dated March 5, 1924. #1:/Tokyo and Yokohama, Japan, Earthquake 1923/lga00005 ID. George A. Lang Collection. 5 Tokyo and Yokohama, Japan, Earthquake 1923. "A good idea of the tremendous devastation in Tokyo wrought by earthquake and fire. Enclosed find a few snaps taken on the top of the Imperial Hotel in Tokyo which is the only hotel in the earthquake district that survived." J.H. Messervey, letter dated March 5, 1924. #1:/Tokyo and Yokohama, Japan, Earthquake 1923/lga00006 ID. George A. Lang Collection. 6 Tokyo and Yokohama, Japan, Earthquake 1923. "A good idea of the tremendous devastation in Tokyo wrought by earthquake and fire. Enclosed find a few snaps taken on the top of the Imperial Hotel in Tokyo which is the only hotel in the earthquake district that survived." J.H. Messervey, letter dated March 5, 1924. #1:/Tokyo and Yokohama, Japan, Earthquake 1923/lga00007 ID. George A. Lang Collection. 7 Tokyo and Yokohama, Japan, Earthquake 1923. "A good idea of the tremendous devastation in Tokyo wrought by earthquake and fire. Enclosed find a few snaps taken on the top of the Imperial Hotel in Tokyo which is the only hotel in the earthquake district that survived." J.H. Messervey, letter dated March 5, 1924. #1:/Tokyo and Yokohama, Japan, Earthquake 1923/lga00008 ID. George A. Lang Collection. 8 Tokyo and Yokohama, Japan, Earthquake 1923. "A good idea of the tremendous devastation in Tokyo wrought by earthquake and fire. Enclosed find a few snaps taken on the top of the Imperial Hotel in Tokyo which is the only hotel in the earthquake district that survived." J.H. Messervey, letter dated March 5, 1924. #1:/Tokyo and Yokohama, Japan, Earthquake 1923/lga00009 ID. George A. Lang Collection. 9 Tokyo and Yokohama, Japan, Earthquake 1923. "I enclose also a photo of the ruins of the Grand Hotel at Yokohama where I stopped last year." J.H. Messervey, letter dated March 5, 1924. #1:/Lusby G.C. Collection/lgc00002 ID. Lusby, G.C. 2 Channel incised in bedrock in watershed 4.13. Hat for scale. Delta County, Colorado. ca. 1964. Figure 23 in U.S. Geological Survey. Water-supply paper 1532-D. 1971. #1:/Loughlin G.F. Collection-Chief Consolidated Mine/lgf00013 ID. Loughlin, G.F. 13 Form a panorama of Eureka and vicinity. Loughlin 13 from south summit of Keystone Ridge shows Bullion Beck Mill in lower left, and Gemini mine to its right. Photograph 14, shows Chief Consolidated mine left of center, Snowflake mine, and Eureka Hill mine on the right, with Tetro Tunnel and Godiva mine near the ridge in back Godiva Mountain in right background. Pinyon Peak in left background. Tintic District. Juab County, Utah. 1911. Plate 7B in U.S. Geological Survey. Professional Paper 107. 1919. #1:/Loughlin G.F. Collection-Chief Consolidated Mine/lgf00014 ID. Loughlin, G.F. 14 Form a panorama of Eureka and vicinity. Loughlin 13 from south summit of Keystone Ridge shows Bullion Beck Mill in lower left, and Gemini mine to its right. Photograph 14, shows Chief Consolidated mine left of center, Snowflake mine, and Eureka Hill mine on the right, with Tetro Tunnel and Godiva mine near the ridge in back Godiva Mountain in right background. Pinyon Peak in left background. Tintic District. Juab County, Utah. 1911. Plate 7B in U.S. Geological Survey. Professional Paper 107. 1919. #1:/Loughlin G.F. Collection-Centennial Eureka Mine/lgf00015 ID. Loughlin, G.F. 15 Centennial Eureka mine dump from south summit of Keystone Ridge, shows dismantled mill and the dumps of the Eureka Hill mine on left; Eureka Hill open cut, where ore was first found, between Eureka Hill mill and Centennial Eureka shaft. The Eureka Gulch fault passes approximately through the railroad switch in right foreground. Tintic District. Juab County, Utah. 1911. Plate 17 in U.S. Geological Survey. Professional Paper 107. 1919. #1:/Loughlin G.F. Collection/lgf00021 ID. Loughlin, G.F. 21 Mouth of Mammoth Gulch and Tintic valley from low spur south of Herkimer shaft lower part of Robinson, Mammoth Tailings dump, Tintic Smelter and Tintic Valley. Hazy background caused by dust storms. Tintic District, Juab County, Utah. 1911. Plate 10-A in U.S. Geological Survey. Professional paper 107. 1919. #1:/Loughlin G.F. Collection-Mammoth Mine-Grand Central Mine/lgf00022 ID. Loughlin, G.F. 22 Photographs 22, 23 and 24 form a panorama of Mammoth Hill and surrounding mountains. Shows, Opex property, Emerald property, Grand Central mine and Mammoth mine from extreme left to right. Loughlin 23 shows Godiva Mountain left center, Lower Mammoth mine, Gold Chain mine near center. Photo 24 shows Black Jack mine, and Black Jack open cut mine left and extreme left. Tintic District, Juab County, Utah. 1911. Plate 7-A in U.S. Geological Survey. Professional paper 107. 1919. #1:/Loughlin G.F. Collection-Mammoth Mine-Grand Central Mine/lgf00023 ID. Loughlin, G.F. 23 Photographs 22, 23 and 24 form a panorama of Mammoth Hill and surrounding mountains. Shows, Opex property, Emerald property, Grand Central mine and Mammoth mine from extreme left to right. Loughlin 23 shows Godiva Mountain left center, Lower Mammoth mine, Gold Chain mine near center. Photo 24 shows Black Jack mine, and Black Jack open cut mine left and extreme left. Tintic District, Juab County, Utah. 1911. Plate 7-A in U.S. Geological Survey. Professional paper 107. 1919. #1:/Loughlin G.F. Collection-Mammoth Mine-Grand Central Mine/lgf00024 ID. Loughlin, G.F. 24 Photographs 22, 23 and 24 form a panorama of Mammoth Hill and surrounding mountains. Shows, Opex property, Emerald property, Grand Central mine and Mammoth mine from extreme left to right. Loughlin 23 shows Godiva Mountain left center, Lower Mammoth mine, Gold Chain mine near center. Photo 24 shows Black Jack mine, and Black Jack open cut mine left and extreme left. Tintic District, Juab County, Utah. 1911. Plate 7-A in U.S. Geological Survey. Professional paper 107. 1919. #1:/Loughlin G.F. Collection-Yak Mill/lgf00095 ID. Loughlin, G.F. 95 California Gulch, showing placer diggings and the dump from the Yak mill. The west (right) slope of the gulch is glacial "wash"; the east (left) slope is white porphyry and limestone. Lake County, Colorado. 1913. #1:/Colorado-Professional paper 148/lgf00096 ID. Loughlin, G.F. 96 Wolftone and other mines on northwest slope of Carbonate Hill, showing extent to which surface is covered by dumps; view looking south from near north end of Seventh Street, Leadville. Lake County, Colorado. 1913. Plate 42 in U.S. Geological Survey. Professional paper 148. 1927. #1:/Loughlin G.F. Collection-Colorado Yule Marble Company Quarries/lgf00134 ID. Loughlin, G.F. 134 Openings of Colorado Yule Marble Company's quarries and dumps, 3 miles above Marble, Yule Creek Canyon West of Mt. Jackson. Gunnison County, Colorado. 1914. #1:/Washington National Monument/lgf00136 ID. Loughlin, G.F. 136 Washington National Monument, Washington, District of Columbia. Part of the south side of the monument, showing spalling and transverse cracks. 1915. #1:/Loughlin G.F. Collection-Tintic Standard Mine/lgf00221 ID. Loughlin, G.F. 221 Tintic Standard mine, East Tintic district. Juab County, Utah. ca 1911. #1:/Yellowstone National Park/ljd00073 ID. Love, J.D. 73 Yellowstone National Park, Wyoming. Mount Sheridan measured section. Contact between highly silicified Pinyon Conglomerate (above) and Cloverly Formation and Morrison(?) Formation undivided (below). Circa 1966. Figure 4, page D124, U.S. Geological Survey Professional Paper 650-D. #1:/Yellowstone National Park/ljd00074 ID. Love, J.D. 74 Yellowstone National Park, Wyoming. Pinyon Conglomerate, Mount Sheridan measured section. Entire rock has been so completely impregnated with secondary silica that it is hardly recognizable as a conglomerate. One quartzite boulder is outlined below the knife at the upper right. Circa 1966. Figure 5, page D125, U.S. Geological Survey Professional Paper 650-D. #1:/Yellowstone National Park/ljd00075 ID. Love, J.D. 75 Yellowstone National Park, Wyoming. North across Basin Creek toward the Heart Lake Conglomerate. Shown are the main mass of rhyolite welded tuff on Mount Sheridan, Heart Lake Conglomerate, Pinyon Conglomerate, Cloverly Formation and Morrison(?) Formation, dike of rhyolite mixed with Pinyon Conglomerate, and landslide debris. Circa 1966. Figure 6, page D126, U.S. Geological Survey Professional Paper 650-D. #1:/Yellowstone National Park/ljd00076 ID. Love, J.D. 76 Yellowstone National Park, Wyoming. Heart Lake Conglomerate, South Basin Creek measured section. Nearly all rock fragments are Madison Limestone. Matrix contains abundant waxy, very fine-grained gray claystone. Circa 1966. Figure 7, page D128, U.S. Geological Survey Professional Paper 650-D. #1:/Love J.D. Collection-Yellowstone National Park/ljd00077 ID. Love, J.D. 77 West at part of Calcite Springs locality where oil that emerged from the early basic breccia flowed downslope and then was lithified into a tarry crust. Ledge of crystalline sulphur. Temperature of active oil and sulfur vents is 800-850C. Yellowstone National Park, Wyoming. ca. 1965. Published as figure 4 in U. S. Geological Survey. Professional paper 644-B. 1970. #1:/Yellowstone National Park/ljd00078 ID. Love, J.D. 78 Yellowstone National Park, Wyoming. One of the hottest (93 degrees Celsius at the point of the hammer) sulfur and oil vents at Calcite Springs. Layered deposits on both sides of dark fissure are oil-saturated crystalline sulfur, and the fissure is filled with brown fluid oil. Circa 1965. Figure 5, U.S. Geological Survey Professional Paper 644-B. #1:/Love J.D. Collection-Yellowstone National Park/ljd00079 ID. Love, J.D. 79 Northeast across the Yellowstone River at Calcite Springs. Indicated are tilted light-colored interbedded calcite and gypsum, early basic breccia, and partly solidified dark-colored oil flow in center and left foreground that comes up through the breccia Shovel at bottom indicates scale. Yellowstone National Park, Wyoming. ca. 1965. Published as figure 6 in U. S. Geological Survey. Professional paper 644-B. 1970. #1:/Yellowstone National Park/ljd00080 ID. Love, J.D. 80 Yellowstone National Park, Wyoming. North bank of Wrong Creek, east of bison skull site at Rainbow Springs locality. Ledge of Pleistocene brown oil-stained conglomerate. Unvegetated, darker spots are active oil seeps. Base of ledge marks contact with blue-gray claystone sequence which yielded pollen. Circa 1965. Figure 8, U.S. Geological Survey Professional Paper 644-B. #1:/Yellowstone National Park/ljd00081 ID. Love, J.D. 81 Yellowstone National Park, Wyoming. Northeast showing western part of the Rainbow Springs locality. In the foreground, the unvegetated spot is a dark brown oil-saturated siliceous hot-spring deposit. The hole is a mold of a partly silicified tree that was the conduit for the oil. In the grass at the upper left is a swamp that yielded a bison skull. Steam vents are at the upper right. Circa 1965. Figure 9, U.S. Geological Survey Professional Paper 644-B. #1:/Yellowstone National Park/ljd00087 ID. Love, J.D. 87 Yellowstone National Park, Wyoming. Northeast from the top of Mount Hancock. Unconformable contact between the Bacon Ridge Sandstone and the Harebell Formation; Chicken Ridge and an exposure of 3,000 feet of the Harebell, Sickle Creek, Barlow Peak; and an exposure of 2,700 feet of Harebell, Cody Shale, and the Southeast Arm of Yellowstone Lake. Lower part of the type section of the Harebell Formation is at the extreme right margin. Circa 1967. Figure 5, U.S. Geological Survey Professional Paper 734-A. #1:/Yellowstone National Park/ljd00104 ID. Love, J.D. 104 Yellowstone National Park, Wyoming. Sedimentary rocks, their relation to the Pleistocene rhyolitic welded tuffs, and their structure along the south and southeast sides of the Basin Creek uplift. View is northeast from about 1 mile north-northeast of milepost 15 on the southern boundary of the park; Mount Sheridan is 9 miles from the camera point. Mississippian Madison Limestone; cliff and slope of Pennsylvanian Tensleep Sandstone and Pennsylvanian and Mississippian Amsden Formation; Permian Phosphoria Formation and related rocks, showing characteristically patchy tree growth, and chert beds arched into a dome which for the last quarter century or more has been called Val Dome in honor of a lady by that name; Triassic Chugwater Formation, with its surface fluted by southwestward-moving ice, and its members that are described in the Snake River measured section 2 miles from the camera point - Red Peak Member, Alcova Limestone Member, cliff of Crow Mountain Sandstone Member, and cliff of Popo Agie Member; Jurassic Gypsum Spring Formation; Jurassic Sundance Formation, characteristically devoid of trees, and its lower part; Lower Cretaceous and Upper Jurassic Cloverly Formation and Morrison(?) Formation; Upper Cretaceous Frontier Formation at approximate site of large fossil collection described in the text; Paleocene and Upper Cretaceous Pinyon Conglomerate; volcaniclastic rocks of the Eocene Absaroka Volcanic Supergroup; Pleistocene or Pliocene Heart Lake Conglomerate (type section); Pleistocene Huckleberry Ridge Tuff; Pleistocene Lava Creek Tuff on the west wall of Heart River Canyon; large Quaternary landslides in Cretaceous shales. Circa 1967. Frontispiece, U.S. Geological Survey Professional Paper 729-D. Photos ljd00104, ljd00105, ljd00106, and ljd00107 form a panorama. #1:/Yellowstone National Park/ljd00105 ID. Love, J.D. 105 Yellowstone National Park, Wyoming. Sedimentary rocks, their relation to the Pleistocene rhyolitic welded tuffs, and their structure along the south and southeast sides of the Basin Creek uplift. View is northeast from about 1 mile north-northeast of milepost 15 on the southern boundary of the park; Mount Sheridan is 9 miles from the camera point. Mississippian Madison Limestone; cliff and slope of Pennsylvanian Tensleep Sandstone and Pennsylvanian and Mississippian Amsden Formation; Permian Phosphoria Formation and related rocks, showing characteristically patchy tree growth, and chert beds arched into a dome which for the last quarter century or more has been called Val Dome in honor of a lady by that name; Triassic Chugwater Formation, with its surface fluted by southwestward-moving ice, and its members that are described in the Snake River measured section 2 miles from the camera point - Red Peak Member, Alcova Limestone Member, cliff of Crow Mountain Sandstone Member, and cliff of Popo Agie Member; Jurassic Gypsum Spring Formation; Jurassic Sundance Formation, characteristically devoid of trees, and its lower part; Lower Cretaceous and Upper Jurassic Cloverly Formation and Morrison(?) Formation; Upper Cretaceous Frontier Formation at approximate site of large fossil collection described in the text; Paleocene and Upper Cretaceous Pinyon Conglomerate; volcaniclastic rocks of the Eocene Absaroka Volcanic Supergroup; Pleistocene or Pliocene Heart Lake Conglomerate (type section); Pleistocene Huckleberry Ridge Tuff; Pleistocene Lava Creek Tuff on the west wall of Heart River Canyon; large Quaternary landslides in Cretaceous shales. Circa 1967. Frontispiece, U.S. Geological Survey Professional Paper 729-D. Photos ljd00104, ljd00105, ljd00106, and ljd00107 form a panorama. #1:/Yellowstone National Park/ljd00106 ID. Love, J.D. 106 Yellowstone National Park, Wyoming. Sedimentary rocks, their relation to the Pleistocene rhyolitic welded tuffs, and their structure along the south and southeast sides of the Basin Creek uplift. View is northeast from about 1 mile north-northeast of milepost 15 on the southern boundary of the park; Mount Sheridan is 9 miles from the camera point. Mississippian Madison Limestone; cliff and slope of Pennsylvanian Tensleep Sandstone and Pennsylvanian and Mississippian Amsden Formation; Permian Phosphoria Formation and related rocks, showing characteristically patchy tree growth, and chert beds arched into a dome which for the last quarter century or more has been called Val Dome in honor of a lady by that name; Triassic Chugwater Formation, with its surface fluted by southwestward-moving ice, and its members that are described in the Snake River measured section 2 miles from the camera point - Red Peak Member, Alcova Limestone Member, cliff of Crow Mountain Sandstone Member, and cliff of Popo Agie Member; Jurassic Gypsum Spring Formation; Jurassic Sundance Formation, characteristically devoid of trees, and its lower part; Lower Cretaceous and Upper Jurassic Cloverly Formation and Morrison(?) Formation; Upper Cretaceous Frontier Formation at approximate site of large fossil collection described in the text; Paleocene and Upper Cretaceous Pinyon Conglomerate; volcaniclastic rocks of the Eocene Absaroka Volcanic Supergroup; Pleistocene or Pliocene Heart Lake Conglomerate (type section); Pleistocene Huckleberry Ridge Tuff; Pleistocene Lava Creek Tuff on the west wall of Heart River Canyon; large Quaternary landslides in Cretaceous shales. Circa 1967. Frontispiece, U.S. Geological Survey Professional Paper 729-D. Photos ljd00104, ljd00105, ljd00106, and ljd00107 form a panorama. #1:/Yellowstone National Park/ljd00107 ID. Love, J.D. 107 Yellowstone National Park, Wyoming. Sedimentary rocks, their relation to the Pleistocene rhyolitic welded tuffs, and their structure along the south and southeast sides of the Basin Creek uplift. View is northeast from about 1 mile north-northeast of milepost 15 on the southern boundary of the park; Mount Sheridan is 9 miles from the camera point. Mississippian Madison Limestone; cliff and slope of Pennsylvanian Tensleep Sandstone and Pennsylvanian and Mississippian Amsden Formation; Permian Phosphoria Formation and related rocks, showing characteristically patchy tree growth, and chert beds arched into a dome which for the last quarter century or more has been called Val Dome in honor of a lady by that name; Triassic Chugwater Formation, with its surface fluted by southwestward-moving ice, and its members that are described in the Snake River measured section 2 miles from the camera point - Red Peak Member, Alcova Limestone Member, cliff of Crow Mountain Sandstone Member, and cliff of Popo Agie Member; Jurassic Gypsum Spring Formation; Jurassic Sundance Formation, characteristically devoid of trees, and its lower part; Lower Cretaceous and Upper Jurassic Cloverly Formation and Morrison(?) Formation; Upper Cretaceous Frontier Formation at approximate site of large fossil collection described in the text; Paleocene and Upper Cretaceous Pinyon Conglomerate; volcaniclastic rocks of the Eocene Absaroka Volcanic Supergroup; Pleistocene or Pliocene Heart Lake Conglomerate (type section); Pleistocene Huckleberry Ridge Tuff; Pleistocene Lava Creek Tuff on the west wall of Heart River Canyon; large Quaternary landslides in Cretaceous shales. Circa 1967. Frontispiece, U.S. Geological Survey Professional Paper 729-D. Photos ljd00104, ljd00105, ljd00106, and ljd00107 form a panorama. #1:/Yellowstone National Park/ljd00110 ID. Love, J.D. 110 Yellowstone National Park, Wyoming. Northwest from Mount Hancock toward Mount Sheridan, showing Cretaceous strata on both flanks of the Wolverine Anticline and their relation to the faulted Basin Creek uplift and overlapping Pleistocene rhyolite welded tuffs. Mount Sheridan is composed of upfaulted Pleistocene Huckleberry Ridge Tuff, and Flat Mountain is composed of rhyolite welded tuff. Shown are: Pleistocene Lava Creek Tuff; sandstones in the Frontier Formation and Cody Shale on the east flank of the Wolverine Anticline and Bacon Ridge Sandstone and Harebell Formation on the west flank (Big Game Ridge in left foreground); Basin Creek hot springs area; Cretaceous and Jurassic rocks on the southeast flank of the Basin Creek uplift; Heart Lake Conglomerate; Pinyon Conglomerate where it rests on Lower Cretaceous rocks; and Sheridan normal fault along the break in slope. September 2, 1948. Figure 4, U.S. Geological Survey Professional Paper 729-D. Photos ljd00110 and ljd00111 form a panorama. #1:/Yellowstone National Park/ljd00111 ID. Love, J.D. 111 Yellowstone National Park, Wyoming. Northwest from Mount Hancock toward Mount Sheridan, showing Cretaceous strata on both flanks of the Wolverine Anticline and their relation to the faulted Basin Creek uplift and overlapping Pleistocene rhyolite welded tuffs. Mount Sheridan is composed of upfaulted Pleistocene Huckleberry Ridge Tuff, and Flat Mountain is composed of rhyolite welded tuff. Shown are: Pleistocene Lava Creek Tuff; sandstones in the Frontier Formation and Cody Shale on the east flank of the Wolverine Anticline and Bacon Ridge Sandstone and Harebell Formation on the west flank (Big Game Ridge in left foreground); Basin Creek hot springs area; Cretaceous and Jurassic rocks on the southeast flank of the Basin Creek uplift; Heart Lake Conglomerate; Pinyon Conglomerate where it rests on Lower Cretaceous rocks; and Sheridan normal fault along the break in slope. September 2, 1948. Figure 4, U.S. Geological Survey Professional Paper 729-D. Photos ljd00110 and ljd00111 form a panorama. #1:/Yellowstone National Park/ljd00112 ID. Love, J.D. 112 Yellowstone National Park, Wyoming. Largest hot spring in the western group of Snake River Hot Springs, flowing an estimated 6 million gallons per day of clear, slightly sulfurous water that appears to be superheated. The "grainy" appearance of the water in places is caused by myriads of tiny gas bubbles that explode with a crackling noise like popcorn in a hot pan as they reach the surface. The springs emerge from an alluvial flat composed of postglacial silt that must have been deposited before the springs emerged. Note the white leg bone of a large mammal projecting from the silt bank at the upper left. August 1, 1972. Figure 13, U.S. Geological Survey Professional Paper 729-D. #1:/Yellowstone National Park/ljd00114 ID. Love, J.D. 114 Yellowstone National Park, Wyoming. West flank of the Wolverine Anticline where it is crossed by the Snake River in the foreground. Dip slope of hard brown sandstone is the Rusty Beds Member of the Cloverly Formation, showing characteristic ripple marks. September 1, 1949. Figure 8, U.S. Geological Survey Professional Paper 729-D. #1:/Yellowstone National Park/ljd00115 ID. Love, J.D. 115 Yellowstone National Park, Wyoming. Northwest along Big Game Ridge toward hill 10,065 on the south boundary of the park, showing part of the type section of Harebell Formation. Unit 47, a gray coarse-grained very hard marker sandstone, caps this hill and forms a dip slope with selective concentric tree distribution in the center. August 30, 1948. Figure 10, U.S. Geological Survey Professional Paper 729-D. #1:/Yellowstone National Park/ljd00116 ID. Love, J.D. 116 Yellowstone National Park, Wyoming. Northeast, upstream along the Snake River at Snake River Hot Springs. Extinct cone has been partly destroyed by the river. Small spouting boiling springs emerge from travertine cones in the main river channel. Boiling water sprays almost constantly 2 to 3 feet high from some of the cones. July 23, 1949. Figure 14-A, U.S. Geological Survey Professional Paper 729-D. See also photo ljd00117 which was taken 23 years later. #1:/Yellowstone National Park/ljd00117 ID. Love, J.D. 117 Yellowstone National Park, Wyoming. Northeast upstream along the Snake River at Snake River Hot Springs. Same view as photo ljd00116, taken 23 years later, showing erosion of the cone and destruction of travertine cones in the river bed. August 1, 1972. Figure 14-B, U.S. Geological Survey Professional Paper 729-D. #1:/Yellowstone National Park/ljd00118 ID. Love, J.D. 118 Yellowstone National Park, Wyoming. White gypsum bed about 15 feet thick in the lower part of the Gypsum Spring Formation. Basal unit in the formation is a red shale 10 feet thick, at the left of shovel. Hammer marks one of several leached cavities in the gypsum. This is one of two known places in the southern part of the park where the gypsum has not been completely leached out on exposures. July 29, 1972. Figure 7, U.S. Geological Survey Professional Paper 729-D. #1:/Grand Canyon National Park/llb00093 ID. Leopold, L.B. 93 Grand Canyon National Park, Arizona. Flow-measurement gear being readied for observations of velocity and depth of the Colorado River. The 100-pound weight hangs below the current meter from a cable on the winch. Figure 86, U.S. Geological Survey Professional Paper 669-D. #1:/Grand Canyon National Park/llb00094 ID. Leopold, L.B. 94 Grand Canyon National Park, Arizona. Hance Rapids, which are principally caused by the debris cone from a tributary entering on the left bank, apparently viewed from the rim of the Grand Canyon. Figure 88, U.S. Geological Survey Professional Paper 669-D. #1:/Grand Canyon National Park/llb00095 ID. Leopold, L.B. 95 Grand Canyon National Park, Arizona. Looking downstream at Unkar Rapid, which was caused by a tributary fan forcing the Colorado River against a cliff on the left bank. Figure 90, U.S. Geological Survey Professional Paper 669-D. #1:/Grand Canyon National Park/llb00096 ID. Leopold, L.B. 96 Grand Canyon National Park, Arizona. A rapid due primarily to convergence where a rockbound channel narrows in a part of Granite Gorge, apparently viewed from the rim of the canyon. Figure 92, U.S. Geological Survey Professional Paper 669-D. #1:/Grand Canyon National Park/llb00097 ID. Leopold, L.B. 97 Grand Canyon National Park, Arizona. Rapids unrelated to any tributary entrance and presumably caused by a large gravel bar deposited on the streambed. Figure 93, U.S. Geological Survey Professional Paper 669-D. #1:/Lustig L.K. Collection/llk00018 ID. Lustig, L.K. 18 Rockfall of conglomerate blocks in subbasin 2 that has produced a natural debris dam. The block in the right foreground is 5 feet high, measured from the channel floor; but much larger conglomerate blocks also occur. Note the coarse nature of the well-indurated conglomeratic facies and the trace of joint planes that are visible on the nearly vertical canyon wall in the background. The effectiveness of this natural dam could be easily increased by blasting out additional material from the canyon walls above the site. Los Angeles County, California.n.d. Figure 6 in U.S. Geological Survey. Professional paper 442-F. 1965. #1:/Lustig L.K. Collection/llk00021 ID. Lustig, L.K. 21 Aerial view of the southeastern part of Deep Spring Valley. Note the apron of alluvium produced by the merger of fans, beyond the playa and to the right. The channel at A is entrenched, and lighter colored sediment, indicative of modern transport can be seen along its course and at the lower boundary of the fan. Inyo County, California. ca. 1961. Figure 86 in U.S. Geological Survey. Professional paper 352-F. 1965. #1:/Lustig L.K. Collection/llk00041 ID. Lustig, L.K. 41 The lower reach of the Owens Valley mudflow showing clear-water dissection. Although the deposit is undergoing dissection, it is apparent that sedimentation has occurred across a wide flat area at the lower boundary of the fan. The fence posts shown parallel the main highway through the valley, which is about 8 miles below the mountain front of the Sierra Nevada at this point. Note the dark color of the deposit. Inyo County, California. ca. 1961. Figure 130 in U.S. Geological Survey. Professional paper 352-F. 1965 #1:/Lustig L.K. Collection/llk00042 ID. Lustig, L.K. 42 The lower reach of the Owens Valley mudflow showing floating debris on the thin deposit. The flow was quite dense and viscous in this area (approx.0.25 mile south of the clear-water flow shown in photo 41) and in addition to the cans seen in the foreground, many cobble-size particles were also rolled and carried across a wide area of low slope. Inyo County, California. ca. 1961. Figure 131 in U.S. Geological Survey. Professional paper 352-F. 1965 #1:/Alaska/lmc00004 ID. Lachenbruch, M.C. 4ct Alaska. Ice mound at Howard Pass on the Arctic Slope. 1949. #1:/Alaska/lmc00007 ID. Lachenbruch, M.C. 7ct Alaska. Ice mound at Howard Pass on the Arctic Slope. 1949. #1:/Hawaii Volcanoes National Park/lpw00003 ID. Lipman, P.W. 3ct Hawaii Volcanoes National Park. Eruption of Kilauea Volcano beginning in 1983. Vent 1, viewed from the northwest side. Ed Wolfe in the foreground, reporting to Hawaii Volcano Observatory by radio. 9:00 a.m., March 27, 1984. #1:/Hawaii Volcanoes National Park/lpw00004 ID. Lipman, P.W. 4ct Hawaii Volcanoes National Park. Eruption of Kilauea Volcano beginning in 1983. Vent 1 and the upper channel. 7:30 a.m., March 31, 1984. #1:/Hawaii Volcanoes National Park/lpw00005 ID. Lipman, P.W. 5ct Hawaii Volcanoes National Park. Eruption of Kilauea Volcano beginning in 1983. Main vent and channel 1, viewed from Pu'u at 9,146 feet elevation. 3:30 p.m., March 31, 1984. #1:/Hawaii Volcanoes National Park/lpw00006 ID. Lipman, P.W. 6ct Hawaii Volcanoes National Park. Eruption of Kilauea Volcano beginning in 1983. Standing wave forming upstream of an island; upper channel 1 at about 9,300 feet elevation. Ed Wolfe taking a temperature measurement on a sluggish channel eddy. 10:00 a.m., March 31, 1984. #1:/Hawaii Volcanoes National Park/lpw00008 ID. Lipman, P.W. 8ct Hawaii Volcanoes National Park. Eruption of Kilauea Volcano beginning in 1983. Standing wave behind an island in channel 1 at about 9,300 feet elevation. 7:30 a.m., March 31, 1984. #1:/Hawaii Volcanoes National Park/lpw00009 ID. Lipman, P.W. 9ct Hawaii Volcanoes National Park. Eruption of Kilauea Volcano beginning in 1983. Roofed-over side channel (lava tube) at about 9,000 feet elevation along channel 1. 7:30 a.m., March 31, 1984. #1:/Hawaii Volcanoes National Park/lpw00011 ID. Lipman, P.W. 11ct Hawaii Volcanoes National Park. Eruption of Kilauea Volcano beginning in 1983. Braided lava streams along channel 1, as viewed from 1852 Pu'u at 8,300 feet elevation. Three days later, both side channels had tubed over. 4:30 p.m., April 3, 1984. #1:/Hawaii Volcanoes National Park/lpw00012 ID. Lipman, P.W. 12ct Hawaii Volcanoes National Park. Eruption of Kilauea Volcano beginning in 1983. Partial blockage on flow 1B, just below Powerline Road, at 5,900 feet elevation. A larger blockage the day before had dammed the main channel feeding the lower reaches of flow 1 and caused the breakout of flow 1A at about the same place. 7:45 a.m., March 31, 1984. #1:/Hawaii Volcanoes National Park/lpw00013 ID. Lipman, P.W. 13ct Hawaii Volcanoes National Park. Eruption of Kilauea Volcano beginning in 1983. Temperature measurement by Norm Banks on a small aa channel overflow at the observation station at 5,300 feet elevation on channel 1A. 1#1:30 a.m., March 31, 1984. #1:/Hawaii Volcanoes National Park/lpw00014 ID. Lipman, P.W. 14ct Hawaii Volcanoes National Park. View toward toe of flow 1 marked by smoke from burning vegetation. Channel is well developed within 1 km of flow front during early stage of eruption 4:00 p.m. March 27, 1984. #1:/Hawaii Volcanoes National Park/lpw00015 ID. Lipman, P.W. 15ct Hawaii Volcanoes National Park. Eruption of Kilauea Volcano beginning in 1983. Toe of flow 1, which is advancing at a rate of about 100 meters per hour. 4:00 p.m., March 27, 1984. #1:/Hawaii Volcanoes National Park/lpw00016 ID. Lipman, P.W. 16ct Hawaii Volcanoes National Park. Eruption of Kilauea Volcano beginning in 1983. Stagnant toe of a flow at 3,000 feet elevation in the foreground. Flow 1A, in the upper center, advancing vigorously over the 1852 flow (marked by lower and greener vegetation). 7:30 a.m., April 1, 1984. #1:/Hawaii Volcanoes National Park/lpw00018 ID. Lipman, P.W. 18ct Hawaii Volcanoes National Park. Eruption of Kilauea Volcano beginning in 1983. Monitoring lateral spreading (about 50 meters per hour) of flow 1A along Tree- Planting Road at 3,700 feet elevation. Norm Banks taking a temperature measurement on the viscous core of an aa flow front. The flow front is about 5 meters high; the center of the flow is 10 to 15 meters high. 9:00 a.m., March 31, 1984. #1:/Hawaii Volcanoes National Park/lpw00019 ID. Lipman, P.W. 19ct Hawaii Volcanoes National Park. Eruption of Kilauea Volcano beginning in 1983. Norm Banks taking a temperature measurement at Tree-Planting Road. 9:00 a.m., March 31, 1984. #1:/Hawaii Volcanoes National Park/lpw00020 ID. Lipman, P.W. 20ct Hawaii Volcanoes National Park. Eruption of Kilauea Volcano beginning in 1983. Toe of flow 1B, at about 5,550 feet elevation, advancing at 50 meters per hour. Noon, April 6, 1984. #1:/Hawaii Volcanoes National Park/lpw00021 ID. Lipman, P.W. 21ct Hawaii Volcanoes National Park. Eruption of Kilauea Volcano beginning in 1983. Rapidly advancing toe of overflow from the north channel at about 9,200 feet elevation. Note well developed channel. 8:30 a.m., April 12, 1984. #1:/Hawaii Volcanoes National Park/lpw00022 ID. Lipman, P.W. 22ct Hawaii Volcanoes National Park. Eruption of Kilauea Volcano beginning in 1983. Toe of a small aa overflow from the north channel flowing rapidly over a step in topography at about 9,100 feet elevation. 8:30 a.m., April 12, 1984. #1:/Hawaii Volcanoes National Park/lpw00024 ID. Lipman, P.W. 24ct Hawaii Volcanoes National Park. Eruption of Kilauea Volcano beginning in 1983. Fast-moving fluid aa breakout approaching Powerline Road at 5,900 feet elevation on the north side of flow 1B. Note a lava ball being rafted toward the flow front. Hank Moore at the left. 10:00 a.m., April 5, 1984. #1:/Hawaii Volcanoes National Park/lpw00025 ID. Lipman, P.W. 25ct Hawaii Volcanoes National Park. Eruption of Kilauea Volcano beginning in 1983. Flow 1B breakout forms a low fluid aa flow crossing upper Powerline Road. #1:00 p.m., April 5, 1984. #1:/Hawaii Volcanoes National Park/lpw00026 ID. Lipman, P.W. 26ct Hawaii Volcanoes National Park. Eruption of Kilauea Volcano beginning in 1983. Flow 1B breakout cutting the upper power line. #1:00 p.m., April 5, 1984. #1:/Landon R.E. Collection-South London Mine/lre00057 ID. Landon, R.E. 57 London Mountain as seen from the valley of South Mosquito Creek showing South London Mine and dump. London Fault passes through London Mountain above and to the right of the mine opening shown on the slope. Park County, Colorado. 1930. #1:/Grand Canyon National Park/lrg00012 ID. Luedke, R.G. 12 Grand Canyon National Park, Arizona. Northeast at the east end of the Grand Canyon where the Colorado River and the Little Colorado River join, viewed from Desert View on the south rim. Circa 1953. #1:/Grand Canyon National Park/lrg00013 ID. Luedke, R.G. 13 Grand Canyon National Park, Arizona. Hill of Triassic Moenkopi on the plateau surface of Permian Kaibab, viewed from Desert View on the south rim, looking east. Circa 1953. #1:/Bryce Canyon National Park/lrg00016 ID. Luedke, R.G. 16 Bryce Canyon National Park, Utah. Northeast view of erosional forms of the Wasatch Formation from lookout point at Bryce Canyon headquarters. Circa 1953. #1:/Bryce Canyon National Park/lrg00017 ID. Luedke, R.G. 17 Bryce Canyon National Park, Utah. Natural bridge in the Wasatch Formation in the south end of the park. Circa 1953. #1:/Lindvall R.M. Collection/lrm00009 ID. Lindvall, R.M. 9ct Ten feet of Wisconsin till overlying four feet of Fort Union formation sandstone. Twelve miles north of Golden Valley, Mercer County, North Dakota. September 1948. #1:/Thaden R.E. Collection/lrq00005 ID. Lewis, R.Q., Sr. 5 Bridger Jack graben, looking east from north rim above head of Davis Canyon. Cedar Mesa Sandstone member and Organ Rock Tongue of the Cutler Formation. Hoskinnini Member and upper member of the Moenkopi Formation. Mudstone unit, Moss Back Member, and upper part of the Chinle Formation. Wingate Sandstone, Kayenta Formation. Photo by R.E. Thaden. San Juan County, Utah. 1955. Figure 11 in U.S. Geological Survey. Professional paper 474-B. 1965. #1:/Colorado National Monument/lsw00002 ID. Lohman, S.W. 2 Colorado National Monument, Colorado. Crossbedding in the Wingate Sandstone. True dip shown by beds in the left background. View is north along Old Serpents Trail. Circa 1950. Figure 5, U.S. Geological Survey Professional Paper 451. #1:/Canyonlands National Park/lsw00008 ID. Lohman, S.W. 8ct Canyonlands National Park, Utah. Stillwater Canyon and Green River, looking southwest from Green River loop of river. Brown material covering nearby parts of the White Rim is the lower part of Overlook. Orange Cliffs in the background. Henry Mountains on the right skyline. Turks Head in the Moenkupi Formation. Figure 23, U.S. Geological Survey Bulletin 1327. #1:/Colorado National Monument/lsw00013 ID. Lohman, S.W. 13 Colorado National Monument, Colorado. Lower part of the Summerville Formation along Rim Rock Drive at Artists Point. Circa 1950. Figure 18, U.S. Geological Survey Professional Paper 451. #1:/Canyonlands National Park/lsw00017 ID. Lohman, S.W. 17ct Canyonlands National Park, Utah. Angel Arch along a tributary of Salt Canyon. Figure 43, U.S. Geological Survey Bulletin 1327. #1:/Canyonlands National Park/lsw00018 ID. Lohman, S.W. 18ct Canyonlands National Park, Utah. Druid Arch. Figure 54, U.S. Geological Survey Bulletin 1327. #1:/Colorado National Monument/lsw00022 ID. Lohman, S.W. 22 Colorado National Monument, Colorado. Red Canyon, looking northeast from Red Canyon Overlook. The canyon mouth frames Grand Junction. Battlement Mesa and Grand Mesa form the left and right skylines. Note the nearly vertical southeastward-facing cliff on the left and the more subdued northwestward- facing slopes on the right. Circa 1950. Figure 30, U.S. Geological Survey Professional Paper 451. #1:/Colorado National Monument/lsw00024 ID. Lohman, S.W. 24 Colorado National Monument, Colorado. Eastern end of Kodels Canyon Fault on the west side of Fruita Canyon. There is no visible displacement except for considerable thinning of Wingate Sandstone. The high cliff of Wingate Sandstone on the left rests on slopes of Chinle Formation. The pinon and juniper-covered slope near the middle is Kayenta Formation resting on thinned Wingate Sandstone. Entrada Sandstone forms the low cliffs on the right. Circa 1950. Figure 32, U.S. Geological Survey Professional Paper 451. #1:/Colorado National Monument/lsw00025 ID. Lohman, S.W. 25 Colorado National Monument, Colorado. Lizard Canyon Monocline, looking southeastward across Lizard Canyon and the north entrance of Monument Canyon from a point on Rim Rock Drive. Note the sharp upper bend on the right and the gentle lower bend on the left. Strata range from Chinle Formation in the canyon on the right to Burro Canyon Formation capping the low hogback on the left. Circa 1950. Figure 33, U.S. Geological Survey Professional Paper 451. #1:/Colorado National Monument/lsw00026 ID. Lohman, S.W. 26 Colorado National Monument, Colorado. Geologic structural features at the north end of the Monument. Scale is approximately #1:25,000. The three stereoscopic pairs may be viewed in turn without optical aids by those accustomed to this procedure or by use of a simple double-lens stereoscope. Geologic features may be identified by comparison with the appropriate part of Plate 1 in this professional paper, orienting map with north to the left. Kodels Canyon Fault; upper bend of Lizard Canyon Monocline; Redland Fault; and upper bend of Fruita Canyon "monocline". Photo by U.S. Soil Conservation Service. Figure 34, U.S. Geological Survey Professional Paper 451. #1:/Colorado National Monument/lsw00027 ID. Lohman, S.W. 27 Colorado National Monument, Colorado. Southeastern part of the Monument, looking southwestward: Redlands Fault, No Thoroughfare Canyon, Old Serpents Trail, Red Canyon, Piton Mesa, and Glade Park. Geologic features may be identified by comparison with the appropriate part of Plate 1 in this professional paper. Scale variable. Photo by Master Sergeants M.M. Friedman and C.M. Fetterman, Lowry Air Force Base. Circa 1950. Figure 35, U.S. Geological Survey Professional Paper 451. #1:/Colorado National Monument/lsw00038 ID. Lohman, S.W. 38 Colorado National Monument, Colorado. Looking north down Ute Canyon. Circa 1950. #1:/Colorado National Monument/lsw00039 ID. Lohman, S.W. 39 Colorado National Monument, Colorado. Old Serpents Trail, looking north. Circa 1950. #1:/Colorado National Monument/lsw00041 ID. Lohman, S.W. 41 Colorado National Monument, Colorado. No Thoroughfare Canyon. Strata range upward from Triassic Chinle Formation on the lower right to Cretaceous Burro Canyon Formation atop the hill on the upper left. Circa 1950. #1:/Colorado National Monument/lsw00042 ID. Lohman, S.W. 42 Colorado National Monument, Colorado. Redlands Fault along the northeast border. Circa 1950. #1:/Arches National Park/lsw00049 ID. Lohman, S.W. 49ct Arches National Park, Utah. South Window, viewed toward the northeast. The arch is 105 feet wide and 66 feet high. December 2, 1974. Figure 39, U.S. Geological Survey Bulletin 1393. #1:/Colorado National Monument/lsw0004c ID. Lohman, S.W. 4c Colorado National Monument, Colorado. The Coke Ovens, looking north from Rim Rock Drive near Artists Point across the arm of Monument Canyon. Chinle Formation, Wingate Sandstone, Kayenta Formation, Entrada Sandstone, Morrison Formation, and Summerville Formation. The general absence of the protective cap of Kayenta Formation from monoliths of Wingate Sandstone in the foreground has allowed erosion into rounded forms resembling beehive coke ovens. The formation of alcoves and arches in the cliff beyond were aided by removal of the underlying Chinle Formation. Joints between the Coke Ovens and in the cliff beyond are in contrast to the general absence of joints in the Entrada Sandstone. Circa 1950. Figure 7, U.S. Geological Survey Professional Paper 451. #1:/Arches National Park/lsw00055 ID. Lohman, S.W. 55cp Arches National Park, Utah. Balanced Rock guarding the Windows section. Rock is Slick Rock Member of Entrada Sandstone resting upon crinkly bedded Dewey Bridge Member of the Entrada. White rock in the foreground is Navajo Sandstone. La Sal Mountains are on the right skyline. July 10, 1972. Frontispiece, U.S. Geological Survey Bulletin 1393. #1:/Arches National Park/lsw00056 ID. Lohman, S.W. 56cp Arches National Park, Utah. An example of rock art. "Moab panel" on a cliff of Wingate Sandstone above U.S. Highway 163 between Courthouse Wash and the Colorado River is believed to be the work of "Barrier Canyon" style people. September 1973. Figure 2-A, U.S. Geological Survey Bulletin 1393. #1:/Arches National Park/lsw00057 ID. Lohman, S.W. 57cp Arches National Park, Utah. An example of rock art. Petroglyphs on a ledge of sandstone in the Morrison Formation on the east side of Salt Wash just north of Wolfe Ranch are believed to have been cut by Ute tribesmen. September 1973. Figure 2-B, U.S. Geological Survey Bulletin 1393. #1:/Arches National Park/lsw00058 ID. Lohman, S.W. 58cp Arches National Park, Utah. Wolfe's Bar-DX Ranch on the west bank of Salt Wash at the start of the trail to Delicate Arch. Left to right: corral, wagon, "new" cabin, and root cellar. "Old" cabin, which formerly was on the right, was washed away by a flood in 1906. Figure 3, U.S. Geological Survey Bulletin 1393. #1:/Arches National Park/lsw00063 ID. Lohman, S.W. 63cp Arches National Park, Utah. Double Arch in the Windows section. Figure 17, U.S. Geological Survey Bulletin 1393. #1:/Arches National Park/lsw00064 ID. Lohman, S.W. 64cp Arches National Park, Utah. Pothole Arch, viewed from the park road near stop 14. The visible span is 90 feet across and 30 feet high. September 1973. Figure 18-E, U.S. Geological Survey Bulletin 1393. #1:/Arches National Park/lsw00065 ID. Lohman, S.W. 65cp Arches National Park, Utah. Glen Canyon Group, forming the southernmost point of the park, viewed across the Colorado River from State Highway 125, half a mile above Moab Bridge. Massive sandstone forming about the lower third of the cliff is the Wingate Sandstone. Darker thin-bedded sandstones and mudstones forming the middle section of the cliff comprise the Kayenta Formation. Upper cliff is the lower part of the Navajo Sandstone. The salt cedar (tamarisk), which lines both banks of the river, is in full bloom. June 17, 1971. Figure 19, U.S. Geological Survey Bulletin 1393. #1:/Arches National Park/lsw00066 ID. Lohman, S.W. 66cp Arches National Park, Utah. Navajo Sandstone cliffs bordering the west bank of the Colorado River in Courthouse Syncline, viewed from State Highway 128 about 2 miles above the Moab Bridge. Note the rounded domes at the top of the cliff. June 17, 1971. Figure 20, U.S. Geological Survey Bulletin 1393. #1:/Arches National Park/lsw00067 ID. Lohman, S.W. 67cp Arches National Park, Utah. Mouth of Salt Wash, viewed across the Colorado River from a point on State Highway 128, 11 miles above Moab Bridge. Dark cliffs on the upper right and left are of Wingate Sandstone capped by a thin protective cover of resistant sandstone beds of the Kayenta Formation. In the background, Wingate is overlain by entire Kayenta Formation and the lower part of the Navajo Sandstone. Wingate is underlain to river level by weathered slope of the Chinle Formation. Water in Salt Wash is largely backwater from the bank-full river. Actual flow in the wash is generally much less, but at times reaches flood proportions. June 17, 1971. Figure 21, U.S. Geological Survey Bulletin 1393. #1:/Arches National Park/lsw00068 ID. Lohman, S.W. 68cp Arches National Park, Utah. Southeast end of faulted Cache Valley Anticline, viewed northwestward across the Colorado River from a point on State Highway 128, 17 miles above Moab Bridge. The high cliff of Wingate Sandstone on the left is capped by a thin protective layer of the Kayenta Formation. About upper third of slope below the base of the cliff is the Chinle Formation, below which is the Moenkopi Formation extending to high-water level. Note bent and broken beds on the right. Figure 22, U.S. Geological Survey Bulletin 1393. #1:/Arches National Park/lsw00069 ID. Lohman, S.W. 69cp Arches National Park, Utah. Faulted Seven Mile-Moab Valley Anticline. View is toward the southwest from the park road about 1 mile above the entrance station. Figure 23 (upper photo), U.S. Geological Survey Bulletin 1393. #1:/Arches National Park/lsw00070 ID. Lohman, S.W. 70cp Arches National Park, Utah. The Three Penguins, viewed westward from the park road about 1 mile above the entrance station. The Penguins are carved in massive Slick Rock Member seen resting upon thin-bedded Dewey Bridge Member. September 1973. Figure 24, U.S. Geological Survey Bulletin 1393. #1:/Arches National Park/lsw00072 ID. Lohman, S.W. 72cp Arches National Park, Utah. Faulted wall of Entrada Sandstone, north of the park road about 1 mile above the entrance station. The fault is nearly vertical and normal, but the fault trace slopes steeply downward to the right, separating upthrown Slick Rock and Dewey Bridge Members on the left from downthrown Slick Rock Member on the right. Light-colored rock in the foreground is Navajo Sandstone. Displacement probably does not exceed 50 feet. September 1973. Figure 26, U.S. Geological Survey Bulletin 1393. #1:/Arches National Park/lsw00073 ID. Lohman, S.W. 73cp Arches National Park, Utah. Park Avenue, viewed to the north along the trail. Figure 27, U.S. Geological Survey Bulletin 1393. #1:/Arches National Park/lsw00074 ID. Lohman, S.W. 74cp Arches National Park, Utah. Balanced rocks on the south wall of Park Avenue at the south end of the trail. July 9, 1972. Figure 28, U.S. Geological Survey Bulletin 1393. #1:/Arches National Park/lsw00075 ID. Lohman, S.W. 75cp Arches National Park, Utah. Courthouse Towers, viewed to the northwest from a point on the park road about three-fourths of a mile northeast of the south end of Park Avenue Trail. Sandstone towers are Slick Rock Member resting on Dewey Bridge Member, which also forms the foreground. The Three Gossips are at upper left; Sheep Rock is just beyond. The Organ and Tower of Babel are on the right. September 23, 1970. Figure 29, U.S. Geological Survey Bulletin 1393. #1:/Arches National Park/lsw00076 ID. Lohman, S.W. 76cp Arches National Park, Utah. The Three Gossips. September 1973. Figure 30, U.S. Geological Survey Bulletin 1393. #1:/Arches National Park/lsw00077 ID. Lohman, S.W. 77cp Arches National Park, Utah. Sheep Rock. September 1973. Figure 31, U.S. Geological Survey Bulletin 1393. #1:/Arches National Park/lsw00078 ID. Lohman, S.W. 78cp Arches National Park, Utah. Petrified sand dunes, looking northeast from the park road 2.7 miles north of Courthouse Wash. The Navajo Sandstone was once a huge sand pile of dunes laid down by winds during an arid interval, so it is interesting to note that the irregularly weathered sandstone once again resembles a pile of cross-bedded dunes. July 11, 1972. Figure 32, U.S. Geological Survey Bulletin 1393. #1:/Arches National Park/lsw00079 ID. Lohman, S.W. 79cp Arches National Park, Utah. "Hoodoos and Goblins" weathered from Dewey Bridge Member, viewed northwest from the park road about 2.5 miles north of Courthouse Wash. August 1, 1972. Figure 33, U.S. Geological Survey Bulletin 1393. #1:/Colorado National Monument/lsw0007a ID. Lohman, S.W. 7a Colorado National Monument, Colorado. North wall of the arm of Monument Canyon. Gradational contact between the Wingate Sandstone and the Kayenta Formation. Erosional unconformity between Kayenta and overlying Entrada Sandstone is also shown. Normally a bench-former as on the right, the Kayenta on the left forms part of a single cliff. Wingate Sandstone, Kayenta Formation, Entrada Sandstone, Morrison Formation, and Summerville Formations. Circa 1950. Figure 10, U.S. Geological Survey Professional Paper 451. #1:/Arches National Park/lsw00081 ID. Lohman, S.W. 81cp Arches National Park, Utah. Intricate crossbeds in Navajo Sandstone on the north side of the road between the Garden of Eden and Cove of Caves. Red crest is basal part of Dewey Bridge Member. August 2, 1972. Figure 35, U.S. Geological Survey Bulletin 1393. #1:/Arches National Park/lsw00082 ID. Lohman, S.W. 82cp Arches National Park, Utah. Cove Arch and Cove of Caves on the north side of the road just west of Double Arch and Parade of Elephants. The arch on the left and three of the caves on the right are roofed by Slick Rock Member and floored by Dewey Bridge Member. The arch is 48.5 feet wide and 34 feet high. In time, the caves will eat through the 30-foot thick fin and become arches. Note the sharp contrast between Dewey Bridge Member and Navajo Sandstone. Figure 36, U.S. Geological Survey Bulletin 1393. #1:/Arches National Park/lsw00083 ID. Lohman, S.W. 83cp Arches National Park, Utah. North Window, viewed to the northeast. The large rock seemingly partly blocking the left end of the arch is actually the southeast end of a fin some 50 feet or more beyond the arch. The arch is 93 feet wide and 51 feet high. Figure 37, U.S. Geological Survey Bulletin 1393. #1:/Arches National Park/lsw00085 ID. Lohman, S.W. 85ct Arches National Park, Utah. Intricate cross beds in Navajo Sandstone on the north side of the road between the Garden of Eden and Cove of Caves. August 2, 1972. #1:/Arches National Park/lsw00086 ID. Lohman, S.W. 86cp Arches National Park, Utah. Turret Arch, viewed northeast toward South Window, part of which is visible on the left. The largest arch is 39 feet wide and 64 feet high; the smaller one is 12 feet wide and 13 feet high. A still smaller one, not visible in the photograph, is 8 feet wide and only 4.5 feet high. Figure 40, U.S. Geological Survey Bulletin 1393. #1:/Arches National Park/lsw00087 ID. Lohman, S.W. 87cp Arches National Park, Utah. Parade of Elephants, viewed west from the end of the trail to Double Arch. Two elephants are on the right, one on the left. August 1, 1972. Figure 41, U.S. Geological Survey Bulletin 1393. #1:/Arches National Park/lsw00088 ID. Lohman, S.W. 88cp Arches National Park, Utah. Suspension foot bridge across Salt Wash in front of Wolfe's cabin at the beginning of Delicate Arch Trail. October 1, 1973. Figure 42, U.S. Geological Survey Bulletin 1393. #1:/Arches National Park/lsw00091 ID. Lohman, S.W. 91cp Arches National Park, Utah. Trail to Sand Dune Arch, looking northwest away from the arch between the towering fins of Slick Rock Member at the northwest end of Fiery Furnace. The southeast end of Devils Garden is in the distance. Figure 45, U.S. Geological Survey Bulletin 1393. #1:/Arches National Park/lsw00092 ID. Lohman, S.W. 92cp Arches National Park, Utah. A sand dune arch in Slick Rock Member in a recess along the southwest wall of a narrow slot. September 1973. Figure 46, U.S. Geological Survey Bulletin 1393. #1:/Arches National Park/lsw00094 ID. Lohman, S.W. 94cp Arches National Park, Utah. Skyline Arch in Slick Rock Member, viewed north from a point about 100 feet north of stop 24. Although the fins are vertical, the strata seem to dip about 15 degrees to the right. The actual dip is to the northeast. August 2, 1972. Figure 48, U.S. Geological Survey Bulletin 1393. #1:/Arches National Park/lsw00096 ID. Lohman, S.W. 96cp Arches National Park, Utah. North from the campground in late afternoon. Reddish Slick Rock Member capped by light-colored Moab Member are seen dipping northeastward toward Sagers Wash Syncline. Book Cliffs, north of Thompson, are 16 miles north on the left skyline. Figure 50, U.S. Geological Survey Bulletin 1393. #1:/Arches National Park/lsw00097 ID. Lohman, S.W. 97cp Arches National Park, Utah. Southeastern part of Devils Garden Trail, viewed northwestward. The narrow slot between fins of Slick Rock Member indicates local spacing of joints. September 1973. Figure 51, U.S. Geological Survey Bulletin 1393. #1:/Arches National Park/lsw00098 ID. Lohman, S.W. 98cp Arches National Park, Utah. Pine Tree Arch, viewed northeastward. The opening is 46 feet wide and 48 feet high. The fin is 30 feet thick. October 1, 1970. Figure 52, U.S. Geological Survey Bulletin 1393. #1:/Arches National Park/lsw00099 ID. Lohman, S.W. 99cp Arches National Park, Utah. Landscape Arch, viewed southwestward from near the end of the improved part of Devils Garden Trail. The ground beneath the arch is covered by slope wash and near the middle with what appears to be a small landslide. Slick Rock Member here is more nearly buff than salmon- colored, because of a smaller content of iron oxide. Fresh breaks and angular blocks of stone at the right abutment indicate relatively recent rock falls. September 1973. Figure 53, U.S. Geological Survey Bulletin 1393. #1:/Colorado National Monument/lsw0009a ID. Lohman, S.W. 9a Colorado National Monument, Colorado. Erosional unconformity between the Slick Rock Member of the Entrada Sandstone and the Kayenta Formation along Rim Rock Drive in the SE 1/4 sec. 13, T. 11 S.R. 102 W. Circa 1950. Figure 12, U.S. Geological Survey Professional Paper 451. #1:/Colorado National Monument/lsw00103 ID. Lohman, S.W. 103cp Colorado National Monument, Colorado. Balanced Rock near the head of Fruita Canyon. Spire and rock are Wingate Sandstone resting on red Chinle Formation. Thin caprock is a protective layer of resistant Kayenta Formation. December 2, 1976. Frontispiece, U.S. Geological Survey Bulletin 1508. #1:/Colorado National Monument/lsw00107 ID. Lohman, S.W. 107cp Colorado National Monument, Colorado. Independence Monument, separating the two entrances of Monument Canyon, looking north from Grand View. Colorado River, Grand Valley, and Book Cliffs in the distance. Roan Cliffs are white cliffs at extreme distance on the right skyline. Dark rock flooring the canyon is Proterozoic metamorphic rock. Red material in the slope at the base of the cliffs is the Chinle Formation. Vertical cliffs are Wingate Sandstone. Thin protective caprock on the top of the cliffs is lower sandstone of the resistant Kayenta Formation. The top of Independence Monument is nearly 450 feet above the floor of the canyon. Figure 6, U.S. Geological Survey Bulletin 1508. #1:/Colorado National Monument/lsw00108 ID. Lohman, S.W. 108cp Colorado National Monument, Colorado. Petrified Sand Dunes in Wingate Sandstone along Old Serpents Trail. View is north across the Redlands and Grand Valley to the Book Cliffs. Battlement Mesa on the right skyline. 1976. Figure 10, U.S. Geological Survey Bulletin 1508. #1:/Colorado National Monument/lsw00109 ID. Lohman, S.W. 109cp Colorado National Monument, Colorado. The Coke Ovens, looking north from the overlook beneath Artist Point. A set of north-south joints has allowed erosion of the Wingate Sandstone to proceed more rapidly along the zones of weakness and has helped create the four ovens shown. Weathering away of the protective caprock of the overlying Kayenta Formation has produced rounded tops on all but the left hand shaft, which is still protected by the Kayenta. Note alcoves and arches in the cliff of the Wingate beyond, the formation of the one on the right having been aided by removal of the underlying soft Chinle Formation. The bench covered by pinon and juniper above the Wingate is resistant thin- bedded Kayenta Formation. The cliff above the bench is the Slick Rock Member of the Entrada Sandstone. The Coke Ovens were named from their resemblance to the beehive shaped brick ovens formerly used to convert bituminous coal into coke for smelting iron. November 11, 1976. Figure 11, U.S. Geological Survey Bulletin 1508. #1:/Colorado National Monument/lsw0010a ID. Lohman, S.W. 10a Colorado National Monument, Colorado. Slick Rock Member of Entrada Sandstone in the west arm of Ute Canyon. Kayenta Formation, Slick Rock Member. Moab Member and Summerville and Morrison Formations poorly exposed above the cliff. Circa 1950. Figure 13, U.S. Geological Survey Professional Paper 451. #1:/Colorado National Monument/lsw00110 ID. Lohman, S.W. 110 Colorado National Monument, Colorado. Red Canyon, looking northeast toward Grand Junction from Red Canyon Overlook. The dark notch at the bottom of the northeast end of the canyon is known as the Gunsight. The linear feature in the Grand Valley beyond is the Denver and Rio Grande Western Railroad. The prominent point near the middle of Book Cliffs is Mount Garfield. Battlement Mesa and Grand Mesa form the left and right skylines. The dark green bush in the right foreground is Mormon Tea. May 28, 1970. Figure 12, U.S. Geological Survey Bulletin 1508. #1:/Colorado National Monument/lsw00111 ID. Lohman, S.W. 111cp Colorado National Monument, Colorado. Northwest from a point northeast of Monument Canyon view. Thin-bedded Kayenta Formation protecting the underlying cliff of softer Wingate Sandstone. Rim Rock Drive is on the bench of Kayenta close to the thinner cliff of Entrada Sandstone in the background. October 3, 1969. Figure 13, U.S. Geological Survey Bulletin 1508. #1:/Colorado National Monument/lsw00112 ID. Lohman, S.W. 112cp Colorado National Monument, Colorado. Kayenta Formation, showing lenses of hard channel sandstones and wedge of red siltstone and mudstone, along the road cut of Rim Rock Drive near the head of the main stem of Ute Canyon. Vertical grooves remain from drill holes used in blasting the road cut. Figure 14, U.S. Geological Survey Bulletin 1508. #1:/Colorado National Monument/lsw00113 ID. Lohman, S.W. 113cp Colorado National Monument, Colorado. Gap in the rock record, between Kayenta Formation below the 3.5 x 6.0-inch green notebook and Slick Rock Member of the Entrada Sandstone above. This is an erosional unconformity, clearly indicated by the uneven top of the Kayenta, particularly to the left of the notebook. Note solution pits and openings in the Entrada near the top. November 29, 1976. Figure 15, U.S. Geological Survey Bulletin 1508. #1:/Colorado National Monument/lsw00114 ID. Lohman, S.W. 114cp Colorado National Monument, Colorado. Entrada Sandstone, just above a normally dry waterfall in the west arm of Ute Canyon. Note the smooth unjointed cliff of Slick Rock Member protected on the left by an overhanging basal bed of Moab Member, which forms about lower half of the slope in the distance. Upper part of the distant slope is the Summerville Formation overlain by Salt Wash Member of the Morrison Formation. Slick Rock on the left rests upon eroded cross- bedded sandstone in the Kayenta Formation in which the canyon is cut. October 3, 1969. Figure 16, U.S. Geological Survey Bulletin 1508. #1:/Colorado National Monument/lsw00115 ID. Lohman, S.W. 115cp Colorado National Monument, Colorado. Moab Member of Entrada Sandstone, showing typical step-like weathering, in the west arm of Ute Canyon about a quarter of a mile above the view shown in photo lsw00114. Moab Member caps and protects the overhang of Slick Rock Member. Moab is overlain by unexposed slope of Summerville Formation and lower part of Morrison Formation. December 15, 1978. Figure 17, U.S. Geological Survey Bulletin 1508. #1:/Colorado National Monument/lsw00116 ID. Lohman, S.W. 116cp Colorado National Monument, Colorado. Mottled salmon-and-white Slick Rock Member, overlain by white level-bedded Moab Member on the west side of Rim Rock Drive about four-tenths of a mile north of the head of main Ute Canyon. Circa 1950. Figure 18, U.S. Geological Survey Bulletin 1508. #1:/Colorado National Monument/lsw00118 ID. Lohman, S.W. 118cp Colorado National Monument, Colorado. Summerville Formation at Artists Point. The base of the formation rests upon Moab Member of Entrada just beneath the pavement. Top of the Summerville here has been removed by erosion. May 25, 1970. Figure 20, U.S. Geological Survey Bulletin 1508. #1:/Colorado National Monument/lsw0011a ID. Lohman, S.W. 11a Colorado National Monument, Colorado. Mottled salmon and white Slick Rock Member of the Entrada Sandstone overlain by white Moab Member in the southwestern part of Ute Canyon. Circa 1950. Figure 15, U.S. Geological Survey Professional Paper 451. #1:/Colorado National Monument/lsw00122 ID. Lohman, S.W. 122cp Colorado National Monument, Colorado. Ladder Creek Monocline and Redlands Fault. View is northwest from a point near Little Park Road east of the monument. No Thoroughfare Canyon in the foreground, which is bordered on the left by northeastward-dipping beds of Wingate Sandstone at the northwest end of Ladder Creek Monocline. Old Serpents Trail, the lower part of which is barely visible, ascends this dipping block of rock. The dark Proterozoic rocks form the flat-topped bluff on the right and are exposed by the Redlands Fault which lies just above the sharply upturned remnants of the Wingate Sandstone. 1976. Figure 29, U.S. Geological Survey Bulletin 1508. #1:/Colorado National Monument/lsw00123 ID. Lohman, S.W. 123cp Colorado National Monument, Colorado. Lizard Canyon Monocline. View is southeastward across the mouth of Lizard Canyon from the southeastern-most loop of Rim Rock Drive just before it ascends Fruita Canyon. Note gentle lower bend on the lower left and sharper upper one on the upper right. The lower bend changes to Kodels Canyon Fault in Fruita Canyon behind the camera station. Grand Mesa forms the left skyline. Figure 30, U.S. Geological Survey Bulletin 1508. #1:/Colorado National Monument/lsw00124 ID. Lohman, S.W. 124cp Colorado National Monument, Colorado. Kodels Canyon Fault, looking northwest across the mouth of Fruita Canyon from a point on Rim Rock Drive. Here, along a normal fault dipping steeply northeastward, the 350-foot cliff of Wingate Sandstone on the upper left has been sheared and squeezed into only a few feet of broken rock overlain by a steep slope of the Kayenta Formation covered by pinon and juniper. The thinner cliff on the right is the Entrada Sandstone which belongs high atop the cliffs on the left. Book Cliffs form the distant skyline on the right. May 29, 1970. Figure 31, U.S. Geological Survey Bulletin 1508. #1:/Colorado National Monument/lsw00125 ID. Lohman, S.W. 125cp Colorado National Monument, Colorado. Kodels Canyon Fault looking northwestward across the canyon of the same name. The base of Wingate cliff on the left is just about opposite the top of the Wingate on the right. Here, nature was kind to the geologist, for the vertical displacement (rise of the left side with respect to the right) is virtually the thickness of the Wingate Sandstone, about 350 feet. The Wingate on the right is lighter colored than that on the left, seemingly because rock falls removed desert varnish-coated rocks and exposed the true color of the sandstone. Figure 32, U.S. Geological Survey Bulletin 1508. #1:/Colorado National Monument/lsw00126 ID. Lohman, S.W. 126cp Colorado National Monument, Colorado. Fallen Rock, in the west arm of Ute Canyon below the waterfall, viewed from Fallen Rock Overlook. The sun-facing left side of the canyon, containing the fallen block of Wingate Sandstone, is a vertical cliff; whereas the shaded right side can be readily climbed. The right side contains a trail near the middle of the photo, but it is hidden by vegetation. May 28, 1970. Figure 35, U.S. Geological Survey Bulletin 1508. #1:/Colorado National Monument/lsw00129 ID. Lohman, S.W. 129cp Colorado National Monument, Colorado. Updragged Wingate Sandstone along Redlands Fault, looking northwest from a side road 1.5 miles southwest of the intersection of South Camp Road and South Broadway. The white "pimple" atop the cliff near the left skyline is Liberty Cap, an erosional remnant of the Wingate Sandstone, reachable via the Liberty Cap Trail. Here the Chinle Formation was largely squeezed out along the fault. 1976. Figure 38, U.S. Geological Survey Bulletin 1508. #1:/Colorado National Monument/lsw0012a ID. Lohman, S.W. 12a Colorado National Monument, Colorado. Step-like weathering of Moab Member of Entrada Sandstone in the west arm of Ute Canyon. Jes, Slick Rock Member of Entrada; Jem, Moab Member; Js, Summerville Formation. Circa 1950. Figure 16, U.S. Geological Survey Professional Paper 451. #1:/Colorado National Monument/lsw00131 ID. Lohman, S.W. 131cp Colorado National Monument, Colorado. Reverse part of Redlands Fault, looking N. 65 degrees W. from a point on South Broadway along the boundary fence. Most of the Chinle Formation has been squeezed out, but the lower part of Wingate Sandstone may be seen dipping about 45 degrees southwestward beneath dark Proterozoic rocks. The next pink band on the right is Entrada Sandstone. The jumbled mass of white sandstone slabs on the right is part of the Salt Wash Member of the Morrison Formation and known locally as "White Rock". 1976. Figure 40, U.S. Geological Survey Bulletin 1508. #1:/Colorado National Monument/lsw00132 ID. Lohman, S.W. 132cp Colorado National Monument, Colorado. Northwest end of Redlands Fault, passing through the col to the left of updragged remnants of the Chinle Formation and Wingate Sandstone. The fault, which here is normal, ends against unbroken Lizard Canyon Monocline in the next canyon to the northwest. View is west from a point just south of Wingate Drive a few hundred feet west of South Broadway. 1976. Figure 41, U.S. Geological Survey Bulletin 1508. #1:/Colorado National Monument/lsw00133 ID. Lohman, S.W. 133cp Colorado National Monument, Colorado. West into Monument Canyon, from a curve on Broadway just northwest of the end of South Broadway, showing Independence Monument. Redlands Fault ends in this canyon. Lizard Canyon Monocline can be seen on the extreme right. 1976. Figure 42, U.S. Geological Survey Bulletin 1508. #1:/Colorado National Monument/lsw00134 ID. Lohman, S.W. 134cp Colorado National Monument, Colorado. West from the divide on Broadway 2 miles east of the west entrance. Monoclinal hill on the right is Brushy Basin Member of the Morrison Formation capped by basal beds of the Burro Canyon Formation. The rocks at left middle are blocks of sandstone in the Salt Wash Member of the Morrison. 1976. Figure 34, U.S. Geological Survey Bulletin 1508. #1:/Colorado National Monument/lsw00135 ID. Lohman, S.W. 135cp Colorado National Monument, Colorado. New fill on Rim Rock Drive between two tunnels on the west side of Fruita Canyon. Previous fill was washed out by a flash flood. View is west from the east side of the canyon. 1976. Figure 44, U.S. Geological Survey Bulletin 1508. #1:/Colorado National Monument/lsw00136 ID. Lohman, S.W. 136cp Colorado National Monument, Colorado. Fruita Canyon, looking northeast from a point on Rim Rock Drive above the head of the canyon. Dark Proterozoic rocks floor the canyon, above which are the slopes of the red Chinle Formation and the cliffs of Wingate Sandstone capped by the lower resistant beds of the Kayenta Formation. Beyond the Grand Valley are the dark Book Cliffs and the more distant, light-colored Roan Cliffs. May 28, 1970. Figure 45, U.S. Geological Survey Bulletin 1508. #1:/Colorado National Monument/lsw00139 ID. Lohman, S.W. 139cp Colorado National Monument, Colorado. Window Rock, a window eroded along a vertical joint near the top of the Wingate Sandstone, viewed from Canyon Rim Trail. The fenced overlook on the Kayenta Formation to the left of the window keeps people from crossing the joint above the window, for someday the monolith on the right will fall as did Fallen Rock (photo lsw00126). Light-colored Roan Cliffs of the Green River Formation can be seen beyond Book Cliffs. 1976. Figure 48, U.S. Geological Survey Bulletin 1508. #1:/Colorado National Monument/lsw00141 ID. Lohman, S.W. 141cp Colorado National Monument, Colorado. Visitor center and the Saddlehorn, looking northwest across the canyon from Otto's Trail. Note thin-bedded bench of the Kayenta Formation separating cliffs of the Entrada Sandstone above the Wingate Sandstone below. The Saddlehorn is the remnant of the Entrada on the extreme right. Figure 50, U.S. Geological Survey Bulletin 1508. #1:/Colorado National Monument/lsw00142 ID. Lohman, S.W. 142cp Colorado National Monument, Colorado. Independence Monument, looking northeast from Independence View. Note the updragged block of Wingate Sandstone at the northwestern end of Redlands Fault, just to the right of center. Grand Mesa forms the right skyline. 1976. Figure 51, U.S. Geological Survey Bulletin 1508. #1:/Colorado National Monument/lsw00143 ID. Lohman, S.W. 143cp Colorado National Monument, Colorado. Ute Canyon, looking northeast from Lower Ute Canyon View. Grass-covered alluvium in the distant part of the canyon floor. September 18, 1970. Figure 52, U.S. Geological Survey Bulletin 1508. #1:/Colorado National Monument/lsw00144 ID. Lohman, S.W. 144cp Colorado National Monument, Colorado. Cold Shivers Point, looking north from the fenced overlook on the east edge of Columbus Canyon. The named feature is a toadstool-shaped rock on the upper right. Note dark Proterozoic rocks in the canyon bottom. May 1970. Figure 53, U.S. Geological Survey Bulletin 1508. #1:/Colorado National Monument/lsw00145 ID. Lohman, S.W. 145cp Colorado National Monument, Colorado. Top of Old Serpents Trail, looking northeast from the switchbacks above the tunnel. The sign on the lower right marks the top of the trail. Grand Mesa forms the right skyline. September 18, 1970. Figure 54, U.S. Geological Survey Bulletin 1508. #1:/Colorado National Monument/lsw00146 ID. Lohman, S.W. 146cp Colorado National Monument, Colorado. Looking northeast from Old Serpents Trail, before 1950, when the trail was still used by cars and trucks. One of John Otto's old foot trails joins the old road at the lower middle. A lens of sandstone about 50 feet thick in the Salt Wash Member of the Morrison Formation begins just around the corner near the base of the high bluff across No Thoroughfare Canyon and is seen extending as far to the left as the normally dry wash that drains the canyon. When water flows down the wash after thunderstorms or from melting snow, the sandstone lens takes in water (recharge) which moves slowly down the dip of the lens to the northeast and supplies several artesian wells. In turn, the light band of the Entrada Sandstone beneath the cottonwood trees at the right middle and the dark patch of Wingate Sandstone at the extreme lower right are recharged, and they supply water to artesian wells to the northeast. The covered wagons arranged in a circle in the middle ground are for a western movie about to be filmed. Figure 55, U.S. Geological Survey Bulletin 1508. #1:/Colorado National Monument/lsw00147 ID. Lohman, S.W. 147cp Colorado National Monument, Colorado. South portal of the tunnel through Wingate Sandstone on the west side of No Thoroughfare Canyon above the east entrance. Figure 56, U.S. Geological Survey Bulletin 1508. #1:/Colorado National Monument/lsw00148 ID. Lohman, S.W. 148cp Colorado National Monument, Colorado. Devils Kitchen, looking north from a ridge in the middle of No Thoroughfare Canyon. An erosional remnant of the Wingate Sandstone capped by the lowermost sandstone of the Kayenta Formation. Photograph by T.F. Giles, December 15, 1978. Figure 57, U.S. Geological Survey Bulletin 1508. #1:/Colorado National Monument/lsw00149 ID. Lohman, S.W. 149cp Colorado National Monument, Colorado. Glade Park Fault, crossing the head of No Thoroughfare Canyon. View is southeast from Little Park Road just southeast of the new Monument boundary. The fault passes just to the right of the white cliff of Wingate Sandstone near the bottom through a notch in the east wall of the canyon. The surface to the right (south) of the fault has dropped about 50 feet below the left side. Grand Mesa forms the skyline. 1976. Figure 58, U.S. Geological Survey Bulletin 1508. #1:/Colorado National Monument/lsw00150 ID. Lohman, S.W. 150cp Colorado National Monument, Colorado. Ladder Creek Monocline and Redlands Fault, looking northwest from a lookout point near Little Park Road. A telephoto view of the left half of this scene is shown in photo lsw00122. 1976. Figure 60, U.S. Geological Survey Bulletin 1508. #1:/Capulin Volcano National Monument/lsw00538 ID. Lohman, S.W. 538 Capulin Volcano National Monument, New Mexico. Bombs and ash on the side of the mountain. August 14, 1939. #1:/Canyonlands National Park/lsw00633 ID. Lohman, S.W. 633 Canyonlands National Park, Utah. The Neck and Shafer Trail, looking southwest, taken before rebuilding the park road on the mesa top. The cliff-walled canyon to the right of The Neck, in the middle, drains westward to the Green River. The south fork of Shafer Canyon on the left drains eastward to the Colorado River. This is the narrowest part of Island in the Sky. Photo courtesy of U.S. National Park Service. Figure 11, U.S. Geological Survey Bulletin 1327. #1:/Canyonlands National Park/lsw00639 ID. Lohman, S.W. 639 Canyonlands National Park, Utah. Eastward across Salt Canyon. Note the narrow walls and pinnacles between the canyons and alcoves. Six-Shooter Peaks in the left background. Photo courtesy of W. Alcorn, U.S. National Park Service. Figure 40, U.S. Geological Survey Bulletin 1327. #1:/Canyonlands National Park/lsw00641 ID. Lohman, S.W. 641 Canyonlands National Park, Utah. Arch along upper Salt Canyon, looking north. Photo courtesy of U.S. National Park Service. Figure 44, U.S. Geological Survey Bulletin 1327. #1:/Canyonlands National Park/lsw00642 ID. Lohman, S.W. 642 Canyonlands National Park, Utah. Wedding Ring Arch along upper Salt Canyon. Photo by U.S. National Park Service. Figure 45, U.S. Geological Survey Bulletin 1327. #1:/Canyonlands National Park/lsw00643 ID. Lohman, S.W. 643 Canyonlands National Park, Utah. Hand Holt Arch in Lavender Canyon. Note holes in the sandstone formed by solution and wind scour. Photo by U.S. National Park Service. Figure 46, U.S. Geological Survey Bulletin 1327. #1:/Canyonlands National Park/lsw00644 ID. Lohman, S.W. 644 Canyonlands National Park, Utah. The Needles and The Grabens, looking west over Chesler Park in the foreground, The Grabens on the right, and Cataract Canyon behind. Photo by U.S. Army Air Force. Figure 51, U.S. Geological Survey Bulletin 1327. #1:/Canyonlands National Park/lsw00646 ID. Lohman, S.W. 646 Canyonlands National Park, Utah. The confluence of the Green and Colorado Rivers and some of The Grabens. Figure 59, U.S. Geological Survey Bulletin 1327. #1:/Canyonlands National Park/lsw00648 ID. Lohman, S.W. 648 Canyonlands National Park, Utah. Bowknot Bend of the Green River, looking east from the west end of the narrow intervening saddle. Photo was taken from the same camera station on August 19, 1968, by H.G. Stephens, U.S. Geological Survey, on an expedition led by E.M. Shoemaker to recover camera stations of the 1871 voyage and re-photograph the scenes to record changes during the nearly 100 year interval. Almost no changes occurred in the bedrock, or even in the loose rocks, but that considerable change occurred in the vegetation along the river. Although salt cedar (tamarisk) had been introduced into this country from the Mediterranean area long before 1871, it had not yet spread to this area, but the bare islands in the earlier Hillers photo hjk00476 are covered by salt cedar in the 1968 photograph. Figure 62, U.S. Geological Survey Bulletin 1327. #1:/Canyonlands National Park/lsw00651 ID. Lohman, S.W. 651 Canyonlands National Park, Utah. Anderson Bottom Rincon, looking southeast. Jointed White Rim Sandstone forms cliff-like canyon walls and the mesa in the middle of Anderson Bottom. The Green River is now about 60 feet lower than the former channel on the right. Photo courtesy of U.S. National Park Service. Figure 65, U.S. Geological Survey Bulletin 1327. #1:/Canyonlands National Park/lsw00653 ID. Lohman, S.W. 653 Canyonlands National Park, Utah. Stillwater Canyon of the Green River, viewed from a point on the south rim about 1 mile above (west of) confluence with the Colorado River. Sand bars in J.K. Hillers photo hjk00744, are covered with salt cedar (tamarisk) in this photo, as described for photo lsw00648. Photo by H.G. Stephens, August 23, 1968. Figure 67, U.S. Geological Survey Bulletin 1327. #1:/Canyonlands National Park/lsw00655 ID. Lohman, S.W. 655 Canyonlands National Park, Utah. The Loop of the Colorado River about 5 miles northeast of the confluence. The lower canyon walls are unnamed upper member of the Hermosa Formation overlain by slopes of the Rico Formation. Jointed sandy ledges at the top become sandier to the south, where they comprise the Cedar Mesa Sandstone. Figure 74, U.S. Geological Survey Bulletin 1327. #1:/Canyonlands National Park/lsw00658 ID. Lohman, S.W. 658 Canyonlands National Park, Utah. Chesler Park, Virginia Park, Elephant Canyon, and Chesler Canyon. Photo by G. Grant, U.S. National Park Service, 1937(?). #1:/Canyonlands National Park/lsw00659 ID. Lohman, S.W. 659 Canyonlands National Park, Utah. Large Indian ruins (at least thirty rooms) along upper Salt Creek. Photo courtesy of U.S. National Park Service, May 29, 1962. #1:/Canyonlands National Park/lsw00660 ID. Lohman, S.W. 660 Canyonlands National Park, Utah. From the ledge above the base camp in Horse Canyon below its junction with South Fork. Grand View Point and Junction Butte in the distance. Photo by U.S. National Park Service, May 1962. #1:/Canyonlands National Park/lsw00661 ID. Lohman, S.W. 661 Canyonlands National Park, Utah. Through a crack in the south wall of Chesler Park, looking south toward Virginia Park area. Photo courtesy of L.P. Arnberger, U.S. National Park Service, May 15, 1959. #1:/Canyonlands National Park/lsw00662 ID. Lohman, S.W. 662 Canyonlands National Park, Utah. Junction Butte and the plateau country to the north which is cut through by both the Green and Colorado Rivers, viewed from the rim rocks southwest of The Needles. Photo courtesy of U.S. National Park Service, October 18, 1945. #1:/Canyonlands National Park/lsw00663 ID. Lohman, S.W. 663 Canyonlands National Park, Utah. Junction Butte and the plateau country to the north which is cut through by both the Green and Colorado Rivers, viewed from the rim rocks southwest of The Needles. Photo courtesy of U.S. National Park Service, October 18, 1945. #1:/Canyonlands National Park/lsw00664 ID. Lohman, S.W. 664 Canyonlands National Park, Utah. Junction Butte and the plateau country to the north which is cut through by both the Green and Colorado Rivers, viewed from the rim rocks southwest of The Needles. Photo courtesy of U.S. National Park Service, October 18, 1945. #1:/Canyonlands National Park/lsw00665 ID. Lohman, S.W. 665 Canyonlands National Park, Utah. Junction Butte and the plateau country to the north which is cut through by both the Green and Colorado Rivers, viewed from the rim rocks southwest of The Needles. Photo courtesy of U.S. National Park Service, October 18, 1945. #1:/Canyonlands National Park/lsw00666 ID. Lohman, S.W. 666 Canyonlands National Park, Utah. Rim rocks southwest of The Needles. Photo courtesy of U.S. National Park Service, October 18, 1945. #1:/Canyonlands National Park/lsw00667 ID. Lohman, S.W. 667 Canyonlands National Park, Utah. Chesler Park with island. Photo courtesy of U.S. National Park Service. #1:/Canyonlands National Park/lsw00668 ID. Lohman, S.W. 668 Canyonlands National Park, Utah. Chesler Park and Virginia Park, viewed from the south. Photo courtesy of W.B. Alcorn, U.S. National Park Service. October 15, 1959. #1:/Canyonlands National Park/lsw00669 ID. Lohman, S.W. 669 Canyonlands National Park, Utah. Chesler Park, viewed from the east. Photo courtesy of W.B. Alcorn, U.S. National Park Service, October 15, 1959. #1:/Arches National Park/lsw00670 ID. Lohman, S.W. 670 Arches National Park, Utah. Navajo Arch, viewed northeastward from a branch of Devils Garden Trail, is one of few arches having a flat soil-covered floor. The opening is 40.5 feet wide. Photo by U.S. National Park Service, 1960. Figure 54, U.S. Geological Survey Bulletin 1393. #1:/Canyonlands National Park/lsw00671 ID. Lohman, S.W. 671 Canyonlands National Park, Utah. Cleft Arch Lavendar Canyon, viewed from the north. Photo courtesy of U.S. National Park Service, 1957. #1:/Canyonlands National Park/lsw00672 ID. Lohman, S.W. 672 Canyonlands National Park, Utah. Cleft Arch in upper Lavender Canyon. View from south of the arch. Photo courtesy of L.P. Arnberger, U.S. National Park Service, May 20, 1959. #1:/Canyonlands National Park/lsw00673 ID. Lohman, S.W. 673 Canyonlands National Park, Utah. Fisheye Arch in Salt Canyon. Photo courtesy of U.S. National Park Service, May 29, 1962. #1:/Canyonlands National Park/lsw00674 ID. Lohman, S.W. 674 Canyonlands National Park, Utah. Wedding Ring Arch on upper Salt Creek. Photo courtesy of U.S. National Park Service. May 28, 1962. #1:/Canyonlands National Park/lsw00675 ID. Lohman, S.W. 675 Canyonlands National Park, Utah. Upheaval Dome. Photo courtesy of U.S. National Park Service. #1:/Arnberger L.P. Collection-Canyonlands National Park/lsw00677 ID. Lohman, S.W. 677 Castle Arch in west fork of Horse Canyon, looking west. Photo courtesy of L.P. Arnberger, National Park Service. Canyonlands National Park. San Juan County, Utah. May 17, 1959. #1:/Arnberger L.P. Collection-Canyonlands National Park/lsw00679 ID. Lohman, S.W. 679 Canyonlands National Park, Utah. Formation in Monument Basin, with figure at the base. Photo by L.P. Arnberger, U.S. National Park Service, June 1961. #1:/Canyonlands National Park/lsw00681 ID. Lohman, S.W. 681 Canyonlands National Park, Utah. The Loop on the Colorado River. Photo courtesy of U.S. National Park Service, May 1935. #1:/Canyonlands National Park/lsw00684 ID. Lohman, S.W. 684 Canyonlands National Park, Utah. Cataract Canyon of the Colorado River. Major rapids visible from the vicinity of Standing Rocks. Photo courtesy of U.S. National Park Service, 1960. #1:/Canyonlands National Park/lsw00685 ID. Lohman, S.W. 685 Canyonlands National Park, Utah. Frank Masland inspecting petroglyphs in the lower part of the south fork of Horse Canyon in The Maze. Photo by U.S. National Park Service, May 1962. #1:/Canyonlands National Park/lsw00687 ID. Lohman, S.W. 687 Canyonlands National Park, Utah. Southwest of Indian Creek, between Wooden Shoe and Dark Canyon. Photo by U.S. National Park Service, May 1935. #1:/Canyonlands National Park/lsw00688 ID. Lohman, S.W. 688 Canyonlands National Park, Utah. Needles Formation, north of the Blue Mountains. South end of the La Sal Mountains in the upper left. View is east. Photo by U.S. National Park Service, November 17, 1936. #1:/Canyonlands National Park/lsw00690 ID. Lohman, S.W. 690 Canyonlands National Park, Utah. Monument Basin. Photo by L.P. Arnberger, U.S. National Park Service, June 1961. #1:/Arches National Park/lsw00691 ID. Lohman, S.W. 691 Arches National Park, Utah. Jointed northeast flank of Salt Valley Anticline, viewed westward. The light-colored ledge in the middle background is Salt Valley, bordered on the extreme left by Klondike Bluffs. On the left, dark- colored fins and pinnacles of Slick Rock Member of the Entrada Sandstone form Devils Garden. The sharp pinnacle above the valley is Dark Angel. White bands of sandstone extending to the foreground are composed of Moab Member of the Entrada. Note vegetation in the joints. Photo by U.S. National Park Service. Figure 12, U.S. Geological Survey Bulletin 1393. #1:/Arches National Park/lsw00692 ID. Lohman, S.W. 692 Arches National Park, Utah. Dark Angel, a shaft of the Slick Rock Member, is an erosional remnant of a once high, narrow fin about half a mile northwest of Double 0 Arch. Photo by U.S. National Park Service. Figure 57, U.S. Geological Survey Bulletin 1393. #1:/Arches National Park/lsw00696 ID. Lohman, S.W. 696 Arches National Park, Utah. Tunnel Arch is reached by a short trail north of the main trail through Devils Garden. The opening is 26.5 feet wide and 22 feet high; the span is about 14 feet thick. Figure 14, U.S. Geological Survey Bulletin 1393. #1:/Arches National Park/lsw00697 ID. Lohman, S.W. 697 Arches National Park, Utah. North Window, viewed to the northeast. The large rock seemingly partly blocking the left end of the arch is actually the southeast end of a fin some 50 feet or more beyond the arch. The arch is 93 feet wide and 51 feet high. Figure 37, U.S. Geological Survey Bulletin 1393. #1:/Arches National Park/lsw00698 ID. Lohman, S.W. 698 Arches National Park, Utah. Partition Arch, viewed southwestward from near Devils Garden Trail. The arch frames part of the south wall of Salt Valley and, on the skyline, mesas south of Moab Valley. The opening is 27.5 feet wide and 26 feet high. A smaller opening to the right measures 8.5 feet wide and 8 feet high. Photo by D.T. Reed. Figure 55, U.S. Geological Survey Bulletin 1393. #1:/Colorado National Monument/lswb0008 ID. Lohman, S.W. 8 Colorado National Monument, Colorado. Kayenta Formation in a cut along Rim Rock Drive near the elbow of Ute Canyon. Note irregular lens of red siltstone near the base and irregular bedding of sandstone above. Circa 1950. Figure 11, U.S. Geological Survey Professional Paper 451. #1:/Canyonlands National Park/lswc0008 ID. Lohman, S.W. 8cp Canyonlands National Park, Utah. Space image map of Canyonlands National Park and vicinity from unmanned Earth Resources Technology Satellite (ERTS-1) at a height of about 570 miles. The image covers an area about 100 miles square. Park boundaries are not shown because of the difficulty in locating them accurately, but features such as the Colorado and Green Rivers can be identified. Photo by U.S. National Aeronautics and Space Administration, August 23, 1972. Figure 7, U.S. Geological Survey Bulletin 1327. #1:/Canyonlands National Park/lswc0010 ID. Lohman, S.W. 10cp Canyonlands National Park, Utah. Cane Creek anticline, looking northeast toward the La Sal Mountains from Dead Horse Point. The Colorado River cuts across the crest at the middle right, above which is Anticline Overlook. A jeep trail and part of Shafer dome lie below. Figure 13, U.S. Geological Survey Bulletin 1327. #1:/Canyonlands National Park/lswc0022 ID. Lohman, S.W. 22cp Canyonlands National Park, Utah. Syncline in the core of Lockhart Basin, near Needles Overlook. The dish-shaped roof is Wingate Sandstone, partly bleached. Sloping sides are Chinle Formation. The dark sloping ledge in the left middle ground is Moss Back Member of the Chinle resting on Moenkopi Formation. Photo by E.N. Hinrichs. Figure 28, U.S. Geological Survey Bulletin 1327. #1:/Lohman S.W. Collection-Potash Mine/lswc0049 ID. Lohman, S.W. 49cp Potash Mine of Texas Gulf, Inc. at Potash, as viewed from a boat. High cliffs on right are Wingate Sandstone capped by Kayenta Formation and underlain by slopes of Chinle and Moenkopi Formations. Grand County, Utah. September 1971. Figure 70 in U.S. Geological Survey Bulletin 1327. 1974. #1:/Lohman S.W. Collection-Evaporation Ponds/lswc0050 ID. Lohman, S.W. 50cp Evaporation ponds, used to separate potash from common salt, viewed from jeep train. Black borders are parts of plastic membranes covering bottoms of ponds. Crest of Cane Creek anticline and La Sal Mountains in right background. Grand County, Utah.n.d. Figure 71 in U.S. Geological Survey Bulletin 1327. 1974. #1:/Colorado National Monument/lswc0121 ID. Lohman, S.W. 121cp Colorado National Monument, Colorado. Mount Garfield, a prominent point on the Book Cliffs bordering the northeastern side of the Grand Valley. Slopes are Mancos shale. The ledge about halfway upslope is the toe of an ancient landslide deposit of Mesaverde Sandstone blocks marking the level of an ancestral Grand Valley. Capping beds of sandstone at the crest are basal beds of Mesaverde Group. 1976. Figure 25, U.S. Geological Survey Bulletin 1508. #1:/Lovering T.S. Collection/lts00009 ID. Lovering, T.S. 9 Congress mine near contact of Montezuma granite and Idaho Springs formation, south slope of Ruby Mountain. Summit County, Colorado. 1926. #1:/Lovering T.S. Collection/lts00051 ID. Lovering, T.S. 51 Detroit mine near Breckenridge. Breckenridge district, Summit County, Colorado. ca. 1926. #1:/Lovering T.S. Collection-Wellington Mine/lts00057 ID. Lovering, T.S. 57 Wellington mine. French Creek just beyond the mine. Breckenridge district. Summit County, Colorado. 1926. #1:/Lovering T.S. Collection-Wellington Mine/lts00059 ID. Lovering, T.S. 59 Main vein of Wellington mine, Oro third level, cut by flat fault dipping south vein follows intrusive contact of porphyry; shale above porphyry and vein to right; jasper (?) to left. Breckenridge district, Summit County, Colorado. ca. 1926. #1:/Lovering T.S. Collection-Wellington Mine/lts00239 ID. Lovering, T.S. 239 East up French Gulch. Surface buildings of Wellington mine, Oroshaft. Right middleground in timber is the Country Boy mine. Prominent hill in center is Mineral Hill. Creek channel shows dredge tailings. Summit County, Colorado. ca. 1927. #1:/Lovering T.S. Collection-Washington Mine/lts00240 ID. Lovering, T.S. 240 Across Illinois Gulch, Washington mine left and center. Placer workings in Mayo Gulch with tunnel house of Mayo tunnel in gully. Monitor hydraulic in operation, in low center foreground. Summit County, Colorado. ca. 1927. #1:/Lovering T.S. Collection-Tungsten Vein Mine/lts00361 ID. Lovering, T.S. 361 "Tungsten Vein" mine. Nederland, Colorado. Boulder County, Colorado. 1930. #1:/Lovering T.S. Collection-Tungsten Vein Mine/lts00362 ID. Lovering, T.S. 362 West face of Tungsten Vein, 100 feet level, looking west; following track of schist; down-throw on the north. Boulder County, Colorado. 1930. #1:/Lovering T.S. Collection-Cold Spring Mine/lts00364 ID. Lovering, T.S. 364 Looking east at the Cold Spring mine. Boulder County, Colorado. 1930. #1:/Mesa Verde National Park/lts00398 ID. Lovering, T.S. 398 Mesa Verde National Park, Colorado. Person ascending ladder to Balcony House. 1931. #1:/Mesa Verde National Park/lts00399 ID. Lovering, T.S. 399 Mesa Verde National Park, Colorado. Balcony House 1931. #1:/Mesa Verde National Park/lts00400 ID. Lovering, T.S. 400 Mesa Verde National Park, Colorado. Looking north from Balcony House. 1931. #1:/Mesa Verde National Park/lts00401 ID. Lovering, T.S. 401 Mesa Verde National Park, Colorado. Kiva in Balcony House. 1931. #1:/Lang W.B. Collection-Guadalupe Mountains National Park/lwb00288 ID. Lang, W.B. 288 West face of Guadalupe Mountains from Salt Flat with Patterson Rills in foreground. Shows the point, Signal Peak, Shuma1d and Bartlett Peaks and the Blue Ridge. Guadalupe Mountains National Park. Hudspeth County, Texas. 1935 #1:/Lang W.B. Collection-Guadalupe Mountains National Park/lwb00289 ID. Lang, W.B. 289 West face of Guadalupe Mountains from Salt Flat with Patterson Rills in foreground. Shows the point, Signal Peak, Shuma1d and Bartlett Peaks and the Blue Ridge. Guadalupe Mountains National Park. Hudspeth County, Texas. 1935 #1:/Lang W.B. Collection-Guadalupe Mountains National Park/lwb00290 ID. Lang, W.B. 290 Eroded fault scarp of Guadalupe Mountains viewed from a greater distance west. Panorama forms with 291. Guadalupe Mountains National Park. Hudspeth County, Texas. 1935 #1:/Lang W.B. Collection-Guadalupe Mountains National Park/lwb00291 ID. Lang, W.B. 291 View northeast of Cutoff Ridge in Guadalupe Mountains and Brokeoff Mountains extending north. Guadalupe Mountains National Park. Hudspeth County, Texas. 1935. #1:/Lang W.B. Collection-Guadalupe Mountains National Park/lwb00292 ID. Lang, W.B. 292 View eastward to Guadalupe Mountains from Salt Flat, Gypsum sands in foreground. Guadalupe Mountains National Park. Hudspeth County, Texas. 1935. #1:/Lang W.B. Collection-Guadalupe Mountains National Park/lwb00293 ID. Lang, W.B. 293 View taken from same place as 292,possibly panorama with) but in a more northeast direction to Brokeoff Mountains. Guadalupe Mountains National Park Hudspeth County, Texas. 1935 #1:/Capulin Volcano National Monument/lwt00010 ID. Lee, W.T. 10 Capulin Volcano National Monument, New Mexico. Capulin Mountain, viewed from near Folsom. Circa 1909. #1:/Capulin Volcano National Monument/lwt00012 ID. Lee, W.T. 12 Capulin Volcano National Monument, New Mexico. Blister dome at the base of Capulin Mountain. Circa 1909. #1:/Yosemite National Park/lwt00109 ID. Lee, W.T. 109 Yosemite National Park, California. West lobe of Lyell Glacier. August 18, 1904. #1:/Yosemite National Park/lwt00110 ID. Lee, W.T. 110 Yosemite National Park, California. Central view of Lyell Glacier. August 18, 1904. #1:/Lee W.T. Collection/lwt00122 ID. Lee, W.T. 122 Crooked creek, near Long Valley dam-site, California. 1904. #1:/Grand Canyon National Park/lwt00131 ID. Lee, W.T. 131 Grand Canyon National Park, Arizona. Mouth of the Colorado Canyon. 1904. Plate 7-B, U.S. Geological Survey Bulletin 352. #1:/Lee W.T. Collection/lwt00194 ID. Lee, W.T. 194 Mud cracks, great Colorado River valley near Parker. Yuma County, Arizona.n.d. #1:/Lee W.T. Collection/lwt00204 ID. Lee, W.T. 204 Cove Creek Sulphur Mine, 20 miles north of Beaver, Beaver County, Utah. 1906. #1:/Lee W.T. Collection/lwt00205 ID. Lee, W.T. 205 Cove Creek Sulphur - 200 tons ready for shipment. Beaver County, Utah. 1906. #1:/Lee W.T. Collection-Sulphur Creek Mine/lwt00206 ID. Lee, W.T. 206 Cove Creek Sulphur Mine with volcanic cone of recent origin in background. Beaver County, Utah. 1906. #1:/Lee W.T. Collection/lwt00222 ID. Lee, W.T. 222 Red conglomerate rock in canyon west of Parowan Lake. Iron County, Utah. 1906 #1:/Lee W.T. Collection/lwt00271 ID. Lee, W.T. 271 Mine in Dakota (?) Coal in Wells Gulch near Delta, Mesa County, Colorado. 1907. #1:/Lee W.T. Collection-Rollins Coal Mine/lwt00273 ID. Lee, W.T. 273 Rollins Coal Mine north of Delta. Delta County, Colorado. 1907. #1:/Lee W.T. Collection/lwt00433 ID. Lee, W.T. 433 Looking north from the bluff south of the town of Crested Butte. Gunnison County, Colorado. June 20,1909. #1:/Lee W.T. Collection-Crested Butte Coal Mine/lwt00434 ID. Lee, W.T. 434 Crested Butte coal mine. Gunnison County, Colorado. 1909. Plate 14-B in U.S. Geological Survey. Bulletin 510. 1912. #1:/Lee W.T. Collection-Porter Mine/lwt00437 ID. Lee, W.T. 437 Looking south toward the Porter Mine from the wagon road east of Crested Butte. Shows the gravity incline over which the coal is lowered from the mine to the railway. Gunnison County, Colorado. June 23, 1909. #1:/Lee W.T. Collection-Ruby Anthracite Coal Mine/lwt00464 ID. Lee, W.T. 464 The Ruby Anthracite coal mine at Floresta. The forest-covered slopes are characteristic of the Floresta [coal] field. Gunnison County, Colorado. 1909. Plate 11 in U.S. Geological Survey. Bulletin 510. 1912. #1:/Lee W.T. Collection-Ruby Anthracite Coal Mine/lwt00466 ID. Lee, W.T. 466 Coal breaker at the Ruby Anthracite Mine, Floresta. Gunnison County, Colorado. 1909. #1:/Lee W.T. Collection/lwt00574 ID. Lee, W.T. 574 Terminal moraine of a recent glacier on the east side of Mount Blanca. Size is shown by trees in the foreground which are about 50 feet high. Costilla County, Colorado.n.d. #1:/Lee W.T. Collection-Smuggler Mill/lwt00724 ID. Lee, W.T. 724 Looking down toward Smuggler Mill in foreground near Telluride. San Miguel County, Colorado. ca. 1912. #1:/Lee W.T. Collection/lwt0074a ID. Lee, W.T. 74a Desert vegetation, Maricopa County, Arizona. ca. 1902. #1:/Petrified Forest National Park/lwt00753 ID. Lee, W.T. 753 Petrified Forest National Park, Arizona. Geographers on petrified log "The Bridge" near Adamana. Circa 1904. #1:/Petrified Forest National Park/lwt00754 ID. Lee, W.T. 754 Petrified Forest National Park, Arizona. Geographers on petrified log "The Bridge" near Adamana. Circa 1904. #1:/Rocky Mountain National Park/lwt00975 ID. Lee, W.T. 975 Rocky Mountain National Park, Colorado. Glacial cirque, Mount Fairchild on the left. Lawn Lake in the center. Hagues Peak and the slope of the Mummy Mountains on the right. View is northwest from the head of Black Canyon. July 2, 1916. Photos lwt00975, lwt00976, lwt00977 form a mosaic. #1:/Rocky Mountain National Park/lwt00979 ID. Lee, W.T. 979 Rocky Mountain National Park, Colorado. Falls on the Fall River Road. July 4, 1916. #1:/Rocky Mountain National Park/lwt00980 ID. Lee, W.T. 980 Rocky Mountain National Park, Colorado. Snow bank in the cirque at the head of Fall River near the point where the proposed road to Grand Lake crosses the Continental Divide. Note the relatively smooth top of the range in which the cirques are cut. Snow is carried by the prevailing westerly winds from the high surfaces into the cirques. July 4, 1916. #1:/Rocky Mountain National Park/lwt00981 ID. Lee, W.T. 981 Rocky Mountain National Park, Colorado. Continental Divide. Howard Mountain in the center. Mount Cirrus and Lead Mountain on the right. View is west from the trail south of Poudre Lake. July 4, 1916. #1:/Rocky Mountain National Park/lwt00983 ID. Lee, W.T. 983 Rocky Mountain National Park, Colorado. Glacial cirque. View is northwest from Lawn Lake outlet. July 6, 1916. #1:/Rocky Mountain National Park/lwt00985 ID. Lee, W.T. 985 Rocky Mountain National Park, Colorado. Mount Fairchild, viewed from across Lawn Lake. July 6, 1916. #1:/Rocky Mountain National Park/lwt00989 ID. Lee, W.T. 989 Rocky Mountain National Park, Colorado. Glacial valley of Fall River, viewed from Horseshoe Park. Note the broad U-shape character of glacial valleys. Beaver dam in the lower left. July 7, 1916. #1:/Rocky Mountain National Park/lwt00991 ID. Lee, W.T. 991 Rocky Mountain National Park, Colorado. Fall River valley, viewed from Horseshoe Park. July 7, 1916. #1:/Rocky Mountain National Park/lwt01013 ID. Lee, W.T. 1013 Rocky Mountain National Park, Colorado. Moraine south of Moraine Park, viewed from Stead's Hotel. Longs Peak in the background. July 14, 1916. #1:/Rocky Mountain National Park/lwt01016 ID. Lee, W.T. 1016 Rocky Mountain National Park, Colorado. Forest near Mill Creek Ranger Station killed by fire. July 1916. #1:/Rocky Mountain National Park/lwt01017 ID. Lee, W.T. 1017 Rocky Mountain National Park, Colorado. This beaver house on Mill Creek was abandoned because the pond was drained. The entrance was originally underwater. July 15, 1916. #1:/Rocky Mountain National Park/lwt01018 ID. Lee, W.T. 1018 Rocky Mountain National Park, Colorado. Glacial boulder at the eastern extremity of the moraine near Moraine Park. July 15, 1916. #1:/Rocky Mountain National Park/lwt01043 ID. Lee, W.T. 1043 Rocky Mountain National Park, Colorado. Trees at timberline on Longs Peak Trail. They are all inclined toward the east, away from the prevailing westerly wind, and many of the trunks are stripped of bark on their west side. July 23, 1916. #1:/Rocky Mountain National Park/lwt01048 ID. Lee, W.T. 1048 Rocky Mountain National Park, Colorado. Trees at timberline grow where they are protected by rocks and where the snow drifts. July 23, 1916. #1:/Rocky Mountain National Park/lwt01053 ID. Lee, W.T. 1053 Rocky Mountain National Park, Colorado. Trees at timberline along Longs Peak Trail. Not a fallen tree, but one which grew along the ground, held down each winter by the weight of the snow. July 23, 1916. #1:/Rocky Mountain National Park/lwt01056 ID. Lee, W.T. 1056 Rocky Mountain National Park, Colorado. Cabin at timberline on Longs Peak Trail. July 23, 1916. #1:/Rocky Mountain National Park/lwt01057 ID. Lee, W.T. 1057 Rocky Mountain National Park, Colorado. Lateral moraine of Mills glacier at the mouth of The Chasm, viewed from a cabin at timberline. July 23, 1916. #1:/Rocky Mountain National Park/lwt01058 ID. Lee, W.T. 1058 Rocky Mountain National Park, Colorado. "Forest" of black birch trees at timberline. The trees are about 6 inches high. A few dwarfed pine trees are among these stunted birches. July 23, 1916. #1:/Rocky Mountain National Park/lwt01067 ID. Lee, W.T. 1067 Rocky Mountain National Park, Colorado. Estes Park valley, viewed from the top of Twin Sisters. July 1916. #1:/Rocky Mountain National Park/lwt01068 ID. Lee, W.T. 1068 Rocky Mountain National Park, Colorado. The Chasm and Mills moraine of Longs Peak, viewed from the top of Twin Sisters. June 19, 1916. Plate 5-A, U.S. Geological Survey Bulletin 730-A. #1:/Rocky Mountain National Park/lwt01070 ID. Lee, W.T. 1070 Rocky Mountain National Park, Colorado. Estes Cone, viewed from Tahosa Valley. Longs Peak Inn is barely visible in the lower right. July 19, 1916. Photos lwt01070 and lwt01071 form a panorama. #1:/Rocky Mountain National Park/lwt01071 ID. Lee, W.T. 1071 Rocky Mountain National Park, Colorado. Estes Cone, viewed from Tahosa Valley. July 19, 1916. Photos lwt01070 and lwt01071 form a panorama. #/Rocky Mountain National Park/lwt01072 ID. Lee, W.T. 1072 Rocky Mountain National Park, Colorado. Looking from Copeland Moraine above Copeland Lake across the Saint Vrain to the lateral moraine south of the valley. The glacier which built these great moraines originated in Wild Basin south of Longs Peak and moved down the valley 10 miles or more. July 20, 1916. Plate 7-A, U.S. Geological Survey Bulletin 730-A. #/Rocky Mountain National Park/lwt01073 ID. Lee, W.T. 1073 Rocky Mountain National Park, Colorado. Longs Peak and Tahosa Valley, viewed from a point south of Longs Peak Inn. This valley is outside the area of Wisconsin glaciation, but its broad, smooth floor at an altitude of 9,000 feet, a mile or more in width, with mountains east of it rising to an altitude of 11,436 feet within 1 mile and mountains west of it rising to an altitude of 14,225 feet within 4 miles, suggests glacial action. July 20, 1916. Plate 8- B, U.S. Geological Survey Bulletin 730-A. #1:/Rocky Mountain National Park/lwt01076 ID. Lee, W.T. 1076 Rocky Mountain National Park, Colorado. Longs Peak and The Chasm, viewed up the Mills Glacier gorge. The junction of the moraine with the mountain rock of Mount Lady Washington on the right. July 21, 1916. #/Rocky Mountain National Park/lwt01077 ID. Lee, W.T. 1077 Rocky Mountain National Park, Colorado. Timberline (limber pine) tree on Longs Peak. Its shape is a result of the prevailing westerly wind, which sweeps the snow from the highland plains into the cirques of the eastern slopes. July 21, 1916. Plate 7-B, U.S. Geological Survey Bulletin 730-A. #1:/Rocky Mountain National Park/lwt01078 ID. Lee, W.T. 1078 Rocky Mountain National Park, Colorado. Keyhole and upper part of Boulder Field, viewed from the side of Mount Lady Washington. July 1916. #1:/Rocky Mountain National Park/lwt01081 ID. Lee, W.T. 1081 Rocky Mountain National Park, Colorado. Chasm Lake, the glacial gorge, and lateral moraine of Mills Glacier. July 21, 1916. #1:/Rocky Mountain National Park/lwt01082 ID. Lee, W.T. 1082 Rocky Mountain National Park, Colorado. Trail builders at work above timberline on Longs Peak Trail. July 22, 1916. #1:/Rocky Mountain National Park/lwt01083 ID. Lee, W.T. 1083 Rocky Mountain National Park, Colorado. Trail builders at work above timberline on Longs Peak Trail. July 22, 1916. #1:/Rocky Mountain National Park/lwt01084 ID. Lee, W.T. 1084 Rocky Mountain National Park, Colorado. Trail builders' camp at timberline. Compare the snow bank with the pine trees on the right and low mats of stunted willow and black birch. July 22, 1916. #1:/Rocky Mountain National Park/lwt01085 ID. Lee, W.T. 1085 Rocky Mountain National Park, Colorado. Balanced rock on the left on a glaciated surface near The Chasm. July 23, 1916. #1:/Rocky Mountain National Park/lwt01086 ID. Lee, W.T. 1086 Rocky Mountain National Park, Colorado. Lateral moraines, viewed eastward from The Chasm, down the gorge of Mills Glacier. July 1916. #/Rocky Mountain National Park/lwt01087 ID. Lee, W.T. 1087 Rocky Mountain National Park, Colorado. The Chasm in the east face of Longs Peak, viewed from Chasm Lake. Cirques formed during the Wisconsin stage of glaciation. The precipitous face of the cirque rises about 2,400 feet above the lake. July 22, 1916. Plate 6-A, U.S. Geological Survey Bulletin 730-A. #1:/Rocky Mountain National Park/lwt01089 ID. Lee, W.T. 1089 Rocky Mountain National Park, Colorado. Up The Chasm, viewed from the small glacial lake east of Chasm Lake. July 22, 1916. #1:/Rocky Mountain National Park/lwt01090 ID. Lee, W.T. 1090 Rocky Mountain National Park, Colorado. Longs Peak summit and upper part of The Chasm, viewed from the Boulder Field. July 24, 1916. #1:/Rocky Mountain National Park/lwt01091 ID. Lee, W.T. 1091 Rocky Mountain National Park, Colorado. The Keyhole, through which Longs Peak Trail passes. July 24, 1916. #1:/Rocky Mountain National Park/lwt01092 ID. Lee, W.T. 1092 Rocky Mountain National Park, Colorado. Head of Mills Glacier gorge, viewed from the Keyhole on Longs Peak Trail. July 24, 1916. #1:/Rocky Mountain National Park/lwt01095 ID. Lee, W.T. 1095 Rocky Mountain National Park, Colorado. Rock ridge north of the Keyhole, showing fractured rock which was then split by ice, forming the rocks of the Boulder Field on the right. Ypsilon Mountain in the distance. July 24, 1916. #1:/Rocky Mountain National Park/lwt01099 ID. Lee, W.T. 1099 Rocky Mountain National Park, Colorado. Falls below Chasm Lake. Longs Peak in the background. July 24, 1916. #1:/Rocky Mountain National Park/lwt01102 ID. Lee, W.T. 1102 Rocky Mountain National Park, Colorado. South wall of The Chasm, showing alternate layers of granite and schist. July 23, 1916. #/Rocky Mountain National Park/lwt01111 ID. Lee, W.T. 1111 Rocky Mountain National Park, Colorado. Mills moraine, viewed from Twin Sisters. The glacier originated in The Chasm on the east slope of Longs Peak and was about 4 miles long. The rock debris carried out of The Chasm was dropped chiefly at the sides, building up the ridges shown. The moraines range in altitude from 9,500 feet at their base to nearly 12,000 feet. July 27, 1916. Plate 5-B, U.S. Geological Survey Bulletin 730-A. #1:/Rocky Mountain National Park/lwt01113 ID. Lee, W.T. 1113 Rocky Mountain National Park, Colorado.W.T. Lee interviewing E.A. Mills at Longs Peak Inn. July 27, 1916. #1:/Rocky Mountain National Park/lwt01117 ID. Lee, W.T. 1117 Rocky Mountain National Park, Colorado. Longs Peak, viewed from Thunder Lake. July 28, 1916. #1:/Rocky Mountain National Park/lwt01118 ID. Lee, W.T. 1118 Rocky Mountain National Park, Colorado. Thunder Lake and Mount Alice. July 28, 1916. #1:/Rocky Mountain National Park/lwt01119 ID. Lee, W.T. 1119 Rocky Mountain National Park, Colorado. Thunder Lake and Mount Alice. July 28, 1916. #1:/Rocky Mountain National Park/lwt01120 ID. Lee, W.T. 1120 Rocky Mountain National Park, Colorado. Glaciated rocks in the Saint Vrain valley. July 28, 1916. #1:/Rocky Mountain National Park/lwt01126 ID. Lee, W.T. 1126 Rocky Mountain National Park, Colorado. Copeland Mountain, viewed from Copeland Lake. View is up the Saint Vrain valley. July 29, 1916. #1:/Rocky Mountain National Park/lwt01127 ID. Lee, W.T. 1127 Rocky Mountain National Park, Colorado. Copeland Mountain, viewed from the Saint Vrain valley, showing the level floor of the valley built up by the ground moraine of the glacier which once occupied it. July 29, 1916. #1:/Rocky Mountain National Park/lwt01133 ID. Lee, W.T. 1133 Rocky Mountain National Park, Colorado. Lilypad (Nymph) Lake, a depression in the glacial material near Bear Lake on Flattop Trail. Trees killed by forest fire. August 1, 1916. #1:/Rocky Mountain National Park/lwt01134 ID. Lee, W.T. 1134 Rocky Mountain National Park, Colorado. West, up the glacial gorge, from Dream Lake. August 1, 1916. #1:/Rocky Mountain National Park/lwt01135 ID. Lee, W.T. 1135 Rocky Mountain National Park, Colorado. Longs Peak and glacial gorge, viewed from the forested slopes west of Bear Lake. August 1, 1916. #1:/Rocky Mountain National Park/lwt01136 ID. Lee, W.T. 1136 Rocky Mountain National Park, Colorado. Glacial gorge cut in granite and schist by ice during the canyon cycle of erosion. Tyndall Glacier, at the head of the gorge, extends up to the Flattop Peneplain at an altitude of 12,300 feet. The lake in the foreground is at an altitude of 10,200 feet and 1.25 miles from the head of the glacier. The cliffs rise about 2,000 feet above the lake. August 2, 1916. Plate 4-B, U.S. Geological Survey Bulletin 730-A. #1:/Rocky Mountain National Park/lwt01138 ID. Lee, W.T. 1138 Rocky Mountain National Park, Colorado. Tyndall Glacier and its terminal moraine, viewed from the top of Flattop. August 2, 1916. #1:/Rocky Mountain National Park/lwt01144 ID. Lee, W.T. 1144 Rocky Mountain National Park, Colorado. Andrews Glacier, viewed from the lake into which the ice at its foot melts. Because of the great bend in its midpoint, the upper half of the glacier is not seen from the lake. August 2, 1916. Plate 5-A, U.S. Geological Survey Bulletin 730-A. #1:/Rocky Mountain National Park/lwt01148 ID. Lee, W.T. 1148 Rocky Mountain National Park, Colorado. Never Summer Mountains, whose peaks rise to about the level of Flattop. View is northwest, from Flattop Mountain (altitude 12,500 feet), across the peneplain. August 2, 1916. Plate 2-B, U.S. Geological Survey Bulletin 730-A. #1:/Rocky Mountain National Park/lwt01149 ID. Lee, W.T. 1149 Rocky Mountain National Park, Colorado. Rapids at the mouth of Loch Vale and a glacier gorge, viewed from the trail. August 3, 1916. #1:/Rocky Mountain National Park/lwt01150 ID. Lee, W.T. 1150 Rocky Mountain National Park, Colorado. Loch Vale, viewed from Loch Lake. August 3, 1916. #1:/Rocky Mountain National Park/lwt01151 ID. Lee, W.T. 1151 Rocky Mountain National Park, Colorado. Loch Vale, viewed from Loch Lake. Andrews Glacier on the right. August 3, 1916. #1:/Rocky Mountain National Park/lwt01152 ID. Lee, W.T. 1152 Rocky Mountain National Park, Colorado. Falls at the mouth of Glacier Gorge. August 3, 1916. #1:/Rocky Mountain National Park/lwt01161 ID. Lee, W.T. 1161 Rocky Mountain National Park, Colorado. Moraine north of Bartholf Park, viewed from the mouth of Glacier gorge. August 3, 1916. #1:/Rocky Mountain National Park/lwt01163 ID. Lee, W.T. 1163 Rocky Mountain National Park, Colorado. Bear Lake and Hallett Peak. August 3, 1916. #1:/Rocky Mountain National Park/lwt01164 ID. Lee, W.T. 1164 Rocky Mountain National Park, Colorado. Bear Lake and Hallett Peak. August 3, 1916. #1:/Rocky Mountain National Park/lwt01165 ID. Lee, W.T. 1165 Rocky Mountain National Park, Colorado. "Kamp Komfort" at Bear Lake. Hallett Peak in the background. August 3, 1916. #1:/Rocky Mountain National Park/lwt01168 ID. Lee, W.T. 1168 Rocky Mountain National Park, Colorado. Longs Peak, viewed from the rear of the Stanley Hotel in Estes Park. August 3, 1916. #1:/Rocky Mountain National Park/lwt01170 ID. Lee, W.T. 1170 Rocky Mountain National Park, Colorado. Twin Owls near The Needles. August 3, 1916. #1:/Rocky Mountain National Park/lwt01171 ID. Lee, W.T. 1171 Rocky Mountain National Park, Colorado. The Needles, viewed from the floor of Black Canyon. August 3, 1916. #1:/Rocky Mountain National Park/lwt01174 ID. Lee, W.T. 1174 Rocky Mountain National Park, Colorado. Estes Park, Longs Peak to Flattop, viewed from the top of Prospect Mountain. Giant Rock Mountain in the middle ground. Photographs lwt01174, lwt01175, lwt01176, and lwt01177 form a panorama. August 3, 1916. #1:/Rocky Mountain National Park/lwt01175 ID. Lee, W.T. 1175 Rocky Mountain National Park, Colorado. Estes Park, Longs Peak to Flattop, viewed from the top of Prospect Mountain. Giant Rock Mountain in the middle ground. Photographs lwt01174, lwt01175, lwt01176, and lwt01177 form a panorama. August 3, 1916. #1:/Rocky Mountain National Park/lwt01176 ID. Lee, W.T. 1176 Rocky Mountain National Park, Colorado. Estes Park, Longs Peak to Flattop, viewed from the top of Prospect Mountain. Giant Rock Mountain in the middle ground. Photographs lwt01174, lwt01175, lwt01176, and lwt01177 form a panorama. August 3, 1916. #1:/Rocky Mountain National Park/lwt01177 ID. Lee, W.T. 1177 Rocky Mountain National Park, Colorado. View is northwest from the top of Prospect Mountain, across Estes Park to The Needles, showing the Rocky Mountain Peneplain and a remnant of the higher or Flattop Peneplain on the distant skyline. The area was eroded about 2,500 feet below the Rocky Mountain Peneplain and shaped probably by the ice of the older or pre-Wisconsin stage of glaciation. This photo completes the panorama formed by photos lwt01174, lwt01175, and lwt01176. August 3, 1916. Plate 3-C, U.S. Geological Survey Bulletin 730-A. #1:/Rocky Mountain National Park/lwt01178 ID. Lee, W.T. 1178 Rocky Mountain National Park, Colorado. Longs Peak and Flattop, viewed from a ridge just northeast of Estes Park (in the foreground). August 3, 1916. #1:/Rocky Mountain National Park/lwt01179 ID. Lee, W.T. 1179 Rocky Mountain National Park, Colorado. Bear Lake and Hallett Peak. August 3, 1916. #1:/Rocky Mountain National Park/lwt01180 ID. Lee, W.T. 1180 Rocky Mountain National Park, Colorado. Longs Peak and Glacier Gorge, viewed from the trail on Flattop. August 21, 1916. #1:/Rocky Mountain National Park/lwt01181 ID. Lee, W.T. 1181 Rocky Mountain National Park, Colorado. Cairn marking the trail on Flattop. August 21, 1916. #1:/Rocky Mountain National Park/lwt01186 ID. Lee, W.T. 1186 Rocky Mountain National Park, Colorado. Robert "Squeaky Bob" Wheeler's place, otherwise known as Hotel de Hardscrabble, near the head of the North Fork of the Grand (Colorado) River. August 22, 1916. #1:/Rocky Mountain National Park/lwt01187 ID. Lee, W.T. 1187 Rocky Mountain National Park, Colorado. Head of the valley of the north fork of the Grand (Colorado) River. Robert "Squeaky Bob" Wheeler's place on the right among the trees. August 22, 1916. #1:/Rocky Mountain National Park/lwt01192 ID. Lee, W.T. 1192 Rocky Mountain National Park, Colorado. Never Summer Range, viewed from the trail west of Milner Pass. August 22, 1916. #1:/Lee W.T. Collection-Rocky Mountain National Park/lwt01195 ID. Lee, W.T. 1195 This photograph is a composite of Lee's photographs 1194 and 1195. Never Summer Range from trail east of Poudre lakes. Rocky Mountain National Park. Larimer County, Colorado. August 23, 1916. #1:/Rocky Mountain National Park/lwt01198 ID. Lee, W.T. 1198 Rocky Mountain National Park, Colorado. Never Summer Mountains, west of the north fork of the Colorado River, viewed from Specimen Mountain, down The Crater. August 23, 1916. #1:/Rocky Mountain National Park/lwt01199 ID. Lee, W.T. 1199 Rocky Mountain National Park, Colorado. Side of the gorge (The Crater?) in Specimen Mountain, showing an outcrop of bedded breccia and layers of volcanic glass. August 23, 1916. #1:/Rocky Mountain National Park/lwt01201 ID. Lee, W.T. 1201 Rocky Mountain National Park, Colorado. Specimen Mountain. Erosion remnants of one of the layers of breccia conglomerate made up of fragments and blocks of lava, among which are boulders of schist and granite. August 23, 1916. See also photo lwt01204. #1:/Rocky Mountain National Park/lwt01204 ID. Lee, W.T. 1204 Rocky Mountain National Park, Colorado. Specimen Mountain. Rounded boulder of granite about 10 feet in diameter from the breccia conglomerate shown in photo lwt01201. August 23, 1916. #1:/Rocky Mountain National Park/lwt01208 ID. Lee, W.T. 1208 Rocky Mountain National Park, Colorado. Mount Chapin, Mount Chiquita and Ypsilon Mountain, viewed from Horseshoe Park. Horseshoe Inn in the middle ground. August 23, 1916. #1:/Rocky Mountain National Park/lwt01209 ID. Lee, W.T. 1209 Rocky Mountain National Park, Colorado. South lateral moraine in Moraine Park. View is south, possibly from Deer Mountain. August 26, 1916. #1:/Rocky Mountain National Park/lwt01210 ID. Lee, W.T. 1210 Rocky Mountain National Park, Colorado. Continental Divide, viewed from Deer Mountain, showing the Flattop Peneplain and two monadnocks, Hallett Peak and Taylor Peak, on the skyline; a remnant of the Rocky Mountain Peneplain in the middle ground; the glacial gorge of Big Thompson River; and the west end of the lateral moraine lying south of Moraine Park. August 26, 1916. Plate 3-A, U.S. Geological Survey Bulletin 730-A. #1:/Rocky Mountain National Park/lwt01211 ID. Lee, W.T. 1211 Rocky Mountain National Park, Colorado. Mountain range from Mount Chapin to Mount Fairchild. Horseshoe Park in the foreground. Photos lwt01211 and lwt01212 form a panorama. August 26, 1916. #1:/Rocky Mountain National Park/lwt01212 ID. Lee, W.T. 1212 Rocky Mountain National Park, Colorado. Mountain range from Mount Chapin to Mount Fairchild. Horseshoe Park in the foreground. Photos lwt01211 and lwt01212 form a panorama. August 26, 1916. #1:/Rocky Mountain National Park/lwt01213 ID. Lee, W.T. 1213 Rocky Mountain National Park, Colorado. Above Horseshoe Park to Ypsilon Mountain. August 26, 1916. #1:/Rocky Mountain National Park/lwt01214 ID. Lee, W.T. 1214 Rocky Mountain National Park, Colorado. Saddle north of Hagues Peak. View is west into the cirque at the head of the Poudre River drainage. August 25, 1916. #1:/Rocky Mountain National Park/lwt01216 ID. Lee, W.T. 1216 Rocky Mountain National Park, Colorado. Cirque on the northern boundary of the park, 1 mile southwest of Comanche, viewed from the saddle north of Hagues Peak, a distance of 5 miles. The cirque is 1 mile long, half a mile wide and 1,000 feet deep. On both sides of the cirque is the Flattop Peneplain, which has a maximum altitude here of more than 12,500 feet. August 25, 1916. Plate 6-B, U.S. Geological Survey Bulletin 730-A. #1:/Rocky Mountain National Park/lwt01217 ID. Lee, W.T. 1217 Rocky Mountain National Park, Colorado. Hallett Glacier and a part of the Flattop Peneplain at an altitude of 13,400 feet, north of Hagues Peak. In the dark parts of the glacier, old crevassed ice is exposed. Portion of Plate 3-B, U.S. Geological Survey Bulletin 730-A. #1:/Rocky Mountain National Park/lwt01224 ID. Lee, W.T. 1224 Rocky Mountain National Park, Colorado. Old crevassed ice exposed in Hallett Glacier. August 25, 1916. #1:/Rocky Mountain National Park/lwt01225 ID. Lee, W.T. 1225 Rocky Mountain National Park, Colorado. Crevasses in Hallett Glacier. August 25, 1916. #1:/Rocky Mountain National Park/lwt01228 ID. Lee, W.T. 1228 Rocky Mountain National Park, Colorado. Odessa Lake, viewed from the top of Sheep Mountain. July 9, 1916. #1:/Rocky Mountain National Park/lwt01230 ID. Lee, W.T. 1230 Rocky Mountain National Park, Colorado. Odessa Gorge and Flattop, viewed from the top of Sheep Mountain. Note the cirque with glacial moraine spilling out as a landslide. July 9, 1916. #1:/Rocky Mountain National Park/lwt01232 ID. Lee, W.T. 1232 Rocky Mountain National Park, Colorado. Stunted pine at timberline on Sheep Mountain, southeast of Odessa Lake. The trunk of the dead tree is nearly 3 feet in diameter. July 9, 1916. #1:/Rocky Mountain National Park/lwt01233 ID. Lee, W.T. 1233 Rocky Mountain National Park, Colorado. Timberline trees on Sheep Mountain. The stunted branches are so inflexible that one can walk on top of them but cannot push through. July 9, 1916. #1:/Rocky Mountain National Park/lwt01267 ID. Lee, W.T. 1267 Rocky Mountain National Park, Colorado.E.A. Mills feeding one of his pet chipmunks at Longs Peak Inn. 1916. #1:/Rocky Mountain National Park/lwt01268 ID. Lee, W.T. 1268 Rocky Mountain National Park, Colorado. Bighorn sheep in a snow bank. Photo by E.A. Mills. #1:/Rocky Mountain National Park/lwt01269 ID. Lee, W.T. 1269 Rocky Mountain National Park, Colorado. Fire observer's station on Twin Sisters. Photo by E.P. Cole, 1916. #1:/Rocky Mountain National Park/lwt01270 ID. Lee, W.T. 1270 Rocky Mountain National Park, Colorado. Hikers in The Narrows on Longs Peak. Photo by E.A. Mills. #1:/Rocky Mountain National Park/lwt01271 ID. Lee, W.T. 1271 Rocky Mountain National Park, Colorado. The Notch on Longs Peak. Photo by E.A. Mills. #1:/Zion National Park/lwt01367 ID. Lee, W.T. 1367 Zion National Park, Utah. Near Cable. In the distance is the tree-covered plateau of dark-colored rock resting on the white Colob Sandstone with the great red Kanab Sandstone below. Pre-1926. Photos lwt01367 and lwt01368 form a panorama. #1:/Zion National Park/lwt01368 ID. Lee, W.T. 1368 Zion National Park, Utah. Near Cable. In the distance is the tree-covered plateau of dark-colored rock resting on the white Colob Sandstone with the great red Kanab Sandstone below. Pre-1926. Photos lwt01367 and lwt01368 form a panorama. #1:/Zion National Park/lwt01369 ID. Lee, W.T. 1369 Zion National Park, Utah. Beginning of a natural bridge, an arch in the wall of red sandstone. Pre-1926. #1:/Capulin Volcano National Monument/lwt01392 ID. Lee, W.T. 1392 Capulin Volcano National Monument, New Mexico. Capulin Mountain on a broad platform of lava, viewed from the town of Dedman. Circa 1909. #1:/Capulin Volcano National Monument/lwt01394 ID. Lee, W.T. 1394 Capulin Volcano National Monument, New Mexico. Edge of a flow of basalt in the rim of the platform south of Capulin. Circa. 1909. #1:/Capulin Volcano National Monument/lwt01396 ID. Lee, W.T. 1396 Capulin Volcano National Monument, New Mexico. Blister cone west of Capulin. The smooth grassy plain is formed on a sheet of undisturbed lava. The blister was caused by the buckling of harden crust as the cooling mass moved down the slope. Circa 1909. #1:/Capulin Volcano National Monument/lwt01397 ID. Lee, W.T. 1397 Capulin Volcano National Monument, New Mexico. Blister cone north of Capulin. Circa 1909. #1:/Capulin Volcano National Monument/lwt01398 ID. Lee, W.T. 1398 Capulin Volcano National Monument, New Mexico. Capulin Mountain, viewed from the west, showing the mouth of the crater, about a quarter of a mile wide. The dark spots at the foot of the slope are pine trees about 75 feet high. The south slope (right side) is covered with a forest of scrub pine. Circa 1909. #1:/Capulin Volcano National Monument/lwt01403 ID. Lee, W.T. 1403 Capulin Volcano National Monument, New Mexico. Bottom of the crater or cup- shaped depression in the top of Capulin Mountain, the last lava to solidify. Circa 1909. #1:/Capulin Volcano National Monument/lwt01405 ID. Lee, W.T. 1405 Capulin Volcano National Monument, New Mexico. Northeast from the top of Capulin Mountain. Folsom is 6 miles away. The great lava fields are to the south of the town. Two small volcanoes are in the foreground; the small one is Baby Capulin. Circa 1909. #1:/Capulin Volcano National Monument/lwt01406 ID. Lee, W.T. 1406 Capulin Volcano National Monument, New Mexico. Congealed lava flows, viewed from the top of Capulin Mountain. Circa 1909. #1:/Kansas-Professional paper 129/lwt01454 ID. Lee, W.T. 1454 Osage rock, about 1 mile north Belvidere, Kiowa County, Kansas. 1919. Plate 46 in U.S. Geological Survey. Professional paper 129. 1922. #1:/Lee, W.T. Collection/lwt01456 ID. Lee, W.T. 1456 A Landslide from mine dump at Sugarite, Calfax County, New Mexico Circa 1909. #1:/Lee W.T. Collection/lwt01764 ID. Lee, W.T. 1764 Bed of gypsum in the Lyons Red Beds at Plaster Mill, west of Loveland, The material above the gypsum is red rock and surface detritus. Larimer County, Colorado. 1921. #1:/Rocky Mountain National Park/lwt02029 ID. Lee, W.T. 2029 Rocky Mountain National Park, Colorado. Mummy Range, viewed from high drive across Horseshoe Park. 1921. #1:/Rocky Mountain National Park/lwt02036 ID. Lee, W.T. 2036 Rocky Mountain National Park, Colorado. Rocky Mountain range from Longs Peak to Hagues Peak, viewed from Prospect Mountain. 1921. Photos lwt02036, lwt02037, lwt02038, lwt02039, and lwt02040 form a panorama. #1:/Rocky Mountain National Park/lwt02037 ID. Lee, W.T. 2037 Rocky Mountain National Park, Colorado. Rocky Mountain range from Longs Peak to Hagues Peak, viewed from Prospect Mountain. 1921. Photos lwt02036, lwt02037, lwt02038, lwt02039, and lwt02040 form a panorama. #1:/Rocky Mountain National Park/lwt02038 ID. Lee, W.T. 2038 Rocky Mountain National Park, Colorado. Rocky Mountain range from Longs Peak to Hagues Peak, viewed from Prospect Mountain. 1921. Photos lwt02036, lwt02037, lwt02038, lwt02039, and lwt02040 form a panorama. #1:/Rocky Mountain National Park/lwt02039 ID. Lee, W.T. 2039 Rocky Mountain National Park, Colorado. Rocky Mountain range from Longs Peak to Hagues Peak, viewed from Prospect Mountain. 1921. Photos lwt02036, lwt02037, lwt02038, lwt02039, and lwt02040 form a panorama. #1:/Rocky Mountain National Park/lwt02040 ID. Lee, W.T. 2040 Rocky Mountain National Park, Colorado. Rocky Mountain range from Longs Peak to Hagues Peak, viewed from Prospect Mountain. 1921. Photos lwt02036, lwt02037, lwt02038, lwt02039, and lwt02040 form a panorama. #1:/Yellowstone National Park/lwt02055 ID. Lee, W.T. 2055 Yellowstone National Park, Wyoming. Eagle Nest Rock, a sandstone pillar, is the guardian of Yellowstone Park. 1921. #1:/Yellowstone National Park/lwt02058 ID. Lee, W.T. 2058 Yellowstone National Park, Wyoming. Mammoth Hot Springs, showing trees growing on the hot springs deposits. 1921. #1:/Yellowstone National Park/lwt02064 ID. Lee, W.T. 2064 Yellowstone National Park, Wyoming. Terraces in the Mammoth Hot Springs area. 1921. #1:/Yellowstone National Park/lwt02065 ID. Lee, W.T. 2065 Yellowstone National Park, Wyoming. Face of the terrace at Mammoth Hot Springs. 1921. #1:/Yellowstone National Park/lwt02070 ID. Lee, W.T. 2070 Yellowstone National Park, Wyoming. Mount Everts and most of Mammoth Hot Springs Hotel, viewed from top of Mammoth Hot Springs terrace. 1921. #1:/Yellowstone National Park/lwt02072 ID. Lee, W.T. 2072 Yellowstone National Park, Wyoming. Liberty Cap, a travertine cap 40 feet high on top of an extinct hot spring at Mammoth Hot Springs. 1921. #1:/Yellowstone National Park/lwt02073 ID. Lee, W.T. 2073 Yellowstone National Park, Wyoming. Angel Terrace, snow white travertine deposits by water of a recent hot spring in the Mammoth Hot Springs area. Note trees killed by the accumulation of travertine. 1921. #1:/Yellowstone National Park/lwt02078 ID. Lee, W.T. 2078 Yellowstone National Park, Wyoming. Golden Gate between Terrace Mountain and Bunsen Peak, looking down the canyon of Glen Creek. 1921. #1:/Yellowstone National Park/lwt02079 ID. Lee, W.T. 2079 Yellowstone National Park, Wyoming. Rustic Falls, 70 feet high, at the head of Glen Canyon (Golden Gate Canyon). 1921. #1:/Yellowstone National Park/lwt02080 ID. Lee, W.T. 2080 Yellowstone National Park, Wyoming. Typical road at Apollinaris Spring. 1921. #1:/Yellowstone National Park/lwt02083 ID. Lee, W.T. 2083 Yellowstone National Park, Wyoming. Tree growing without soil on an igneous boulder in Gibbon River. 1921. #1:/Yellowstone National Park/lwt02085 ID. Lee, W.T. 2085 Yellowstone National Park, Wyoming. Rim of Excelsior Geyser in Upper Geyser Basin, the largest geyser in Yellowstone. It has not been active since 1888. 1921. #1:/Yellowstone National Park/lwt02087 ID. Lee, W.T. 2087 Yellowstone National Park, Wyoming. Hot spring in Biscuit Basin in Upper Geyser Basin. 1921. #1:/Yellowstone National Park/lwt02090 ID. Lee, W.T. 2090 Yellowstone National Park, Wyoming. Giant Geyser in eruption in Upper Geyser Basin. 1921. #1:/Yellowstone National Park/lwt02098 ID. Lee, W.T. 2098 Yellowstone National Park, Wyoming. Sponge Geyser in Upper Geyser Basin in action. 1921. #1:/Yellowstone National Park/lwt02099 ID. Lee, W.T. 2099 Yellowstone National Park, Wyoming. The Punch Bowl bubbling. 1921. #1:/Yellowstone National Park/lwt02101 ID. Lee, W.T. 2101 Yellowstone National Park, Wyoming. Beehive Geyser and other geysers in Upper Geyser Basin. 1921. #1:/Yellowstone National Park/lwt02105 ID. Lee, W.T. 2105 Yellowstone National Park, Wyoming. Boiling Spring in action. 1921. #1:/Yellowstone National Park/lwt02107 ID. Lee, W.T. 2107 Yellowstone National Park, Wyoming. The "hold up" bear collecting toll. 1921. #1:/Yellowstone National Park/lwt02109 ID. Lee, W.T. 2109 Yellowstone National Park, Wyoming. Fishing Cave on the Thumb of Yellowstone Lake. The hot water has built up a cone in the cold water of the lake. 1921. #1:/Yellowstone National Park/lwt02111 ID. Lee, W.T. 2111 Yellowstone National Park, Wyoming. Bubbling Mud Geyser on the Yellowstone River north of Yellowstone Lake. 1921. #1:/Yellowstone National Park/lwt02113 ID. Lee, W.T. 2113 Yellowstone National Park, Wyoming. Upper Falls of the Yellowstone River. 1921. #1:/Yellowstone National Park/lwt02115 ID. Lee, W.T. 2115 Yellowstone National Park, Wyoming. Lower Yellowstone Falls, 308 feet high, viewed from near Artists Point. 1921. #1:/Yellowstone National Park/lwt02116 ID. Lee, W.T. 2116 Yellowstone National Park, Wyoming. Lower Falls of the Yellowstone River, viewed from the bottom of the canyon. 1921. #1:/Yellowstone National Park/lwt02118 ID. Lee, W.T. 2118 Yellowstone National Park, Wyoming. Lower Falls of the Yellowstone River, viewed from the rail half way down into the canyon. 1921. #1:/Yellowstone National Park/lwt02124 ID. Lee, W.T. 2124 Yellowstone National Park, Wyoming. The Loop in the steep road east of Sylvan Pass. 1921. #1:/Yellowstone National Park/lwt02125 ID. Lee, W.T. 2125 Yellowstone National Park, Wyoming. Volcanic rocks in the canyon east of Sylvan Pass. 1921. #1:/Yellowstone National Park/lwt02397 ID. Lee, W.T. 2397 Yellowstone National Park, Wyoming. Roaring Mountain. August 15, 1923. #1:/Yellowstone National Park/lwt02399 ID. Lee, W.T. 2399 Yellowstone National Park, Wyoming. Norris Geyser Basin. 1923. #1:/Yellowstone National Park/lwt02400 ID. Lee, W.T. 2400 Yellowstone National Park, Wyoming. Chocolate Pot 2 miles south of Norris Geyser Basin. 1923. #1:/Yellowstone National Park/lwt02403 ID. Lee, W.T. 2403 Yellowstone National Park, Wyoming. Upper Geyser Basin, viewed from near Old Faithful. 1923. #1:/Yellowstone National Park/lwt02404 ID. Lee, W.T. 2404 Yellowstone National Park, Wyoming. Rocket Geyser in Upper Geyser Basin in action. 1923. #1:/Yellowstone National Park/lwt02409 ID. Lee, W.T. 2409 Yellowstone National Park, Wyoming. Sow bear and cub, inspecting a car. 1923. #1:/Yellowstone National Park/lwt02415 ID. Lee, W.T. 2415 Yellowstone National Park, Wyoming. Mammoth Hot Springs. 1923. #1:/Yellowstone National Park/lwt02416 ID. Lee, W.T. 2416 Yellowstone National Park, Wyoming. Mammoth Hot Springs. 1923. #1:/Carlsbad Caverns National Park/lwt02478 ID. Lee, W.T. 2478 Carlsbad Caverns National Park, New Mexico. A partition of onyx. A wall in the chambers known as Shinav's Wigwam (from Shinav, a mythical deity of the Navajo Indians). The stalactites have grown together laterally into a solid curtain-like mass. 1923. Plate 23-B, U.S. Geological Survey Bulletin 760. #1:/Carlsbad Caverns National Park/lwt02482 ID. Lee, W.T. 2482 Carlsbad Caverns National Park, New Mexico. Pillars of onyx. Some of the pillars are relatively smooth, such as that shown on the left, but many of them are composed of tiny overflow fountains beneath which streamers trail away like hanging drapery. 1923. Plate 26-A, U.S. Geological Survey Bulletin 760. #1:/Carlsbad Caverns National Park/lwt02488 ID. Lee, W.T. 2488 Carlsbad Caverns National Park, New Mexico. Spring deposits. Many basins, some of which are now dry, are ornately decorated with mineral matter deposited in a variety of forms. 1923. Plate 25-B, U.S. Geological Survey Bulletin 760. #1:/Carlsbad Caverns National Park/lwt02489 ID. Lee, W.T. 2489 Carlsbad Caverns National Park, New Mexico. Stalactites in the great chamber called Shinav's Wigwam. 1923. Plate 24-A, U.S. Geological Survey Bulletin 760. #1:/Carlsbad Caverns National Park/lwt02493 ID. Lee, W.T. 2493 Carlsbad Caverns National Park, New Mexico. Totem poles, Big Room. #1:/Carlsbad Caverns National Park/lwt02496 ID. Lee, W.T. 2496 Carlsbad Caverns National Park, New Mexico. Hattin's Dome and the Temple of the Sun, one of the spectacular scenes combining many of the characteristic features of the cavern, such as stalactites, stalagmites, columns, and monuments. Photo by R.V. Davis, circa 1923. Plate 24-B, U.S. Geological Survey Bulletin 760. #1:/Carlsbad Caverns National Park/lwt02502 ID. Lee, W.T. 2502 Carlsbad Caverns National Park, New Mexico. Twin Domes. One of the large pillars having relatively slight connection with the ceiling, where stalactites and stalagmites have joined to form a column. Photo by R.V. Davis, circa 1923. Plate 26-B, U.S. Geological Survey Bulletin 760. #1:/Carlsbad Caverns National Park/lwt02503 ID. Lee, W.T. 2503 Carlsbad Caverns National Park, New Mexico. A characteristic scene with a variety and wealth of columns, stalactites, and stalagmites. Photo by R.V. Davis, circa 1923. Plate 27-B, U.S. Geological Survey Bulletin 760. #1:/Carlsbad Caverns National Park/lwt02506 ID. Lee, W.T. 2506 Carlsbad Caverns National Park, New Mexico. Stalactites and stalagmites. Photo by R.V. Davis, 1923. #1:/Carlsbad Caverns National Park/lwt02524 ID. Lee, W.T. 2524 Carlsbad Caverns National Park, New Mexico. Totem poles, Big Room. #1:/Carlsbad Caverns National Park/lwt02525 ID. Lee, W.T. 2525 Carlsbad Caverns National Park, New Mexico. Twin Domes. #1:/Carlsbad Caverns National Park/lwt02529 ID. Lee, W.T. 2529 Carlsbad Caverns National Park, New Mexico. Wayima Lode. #1:/Bandelier National Monument/lwt02694 ID. Lee, W.T. 2694 Bandelier National Monument, New Mexico. Holes in tuff(?) are cave dwellings in Rita de las Frijoles. Pre-1925. #1:/Bandelier National Monument/lwt02696 ID. Lee, W.T. 2696 Bandelier National Monument, New Mexico. Looking directly at one of the cave dwellings. Pre-1925. #1:/Bandelier National Monument/lwt02701 ID. Lee, W.T. 2701 Bandelier National Monument, New Mexico. Guide is seated near an entrance to one of the cave dwellings in Rita de las Frijoles. Pre-1925. #1:/Mammoth Cave National Park/lwt02739 ID. Lee, W.T. 2739 Mammoth Cave National Park, Kentucky. Near the entrance of Great Onyx Cave. 1925. #1:/Mammoth Cave National Park/lwt02740 ID. Lee, W.T. 2740 Mammoth Cave National Park, Kentucky. Hanging garden in Great Onyx Cave. 1925. #1:/Mammoth Cave National Park/lwt02741 ID. Lee, W.T. 2741 Mammoth Cave National Park, Kentucky. Hanging garden in Great Onyx Cave. 1925. #1:/Mammoth Cave National Park/lwt02742 ID. Lee, W.T. 2742 Mammoth Cave National Park, Kentucky. Hanging garden in Great Onyx Cave. 1925. #1:/Mammoth Cave National Park/lwt02743 ID. Lee, W.T. 2743, Mammoth Cave National Park, Kentucky. Gypsum crystals in Great Onyx Cave. 1925. #1:/Mammoth Cave National Park/lwt02744 ID. Lee, W.T. 2744 Mammoth Cave National Park, Kentucky. Gypsum crystals in Great Onyx Cave. 1925. #1:/Mammoth Cave National Park/lwt02746 ID. Lee, W.T. 2746 Mammoth Cave National Park, Kentucky. Chandelier in Great Onyx Cave. 1925. #1:/Mammoth Cave National Park/lwt02747 ID. Lee, W.T. 2747 Mammoth Cave National Park, Kentucky. Brown stalactites near the entrance to the river in Great Onyx Cave. 1925. #1:/Mammoth Cave National Park/lwt02748 ID. Lee, W.T. 2748 Mammoth Cave National Park, Kentucky. Needle points formed by the solution of limestone in Great Onyx Cave. 1925. #1:/Mammoth Cave National Park/lwt02749 ID. Lee, W.T. 2749 Mammoth Cave National Park, Kentucky. "Grand Canyon" at the new entrance to Mammoth Cave. 1925. #1:/Mammoth Cave National Park/lwt02750 ID. Lee, W.T. 2750 Mammoth Cave National Park, Kentucky. Gypsum crystals at the new entrance to Mammoth Cave. 1925. #1:/Mammoth Cave National Park/lwt02751 ID. Lee, W.T. 2751 Mammoth Cave National Park, Kentucky. Solution channel in the ceiling at the new entrance to Mammoth Cave. 1925. #1:/Mammoth Cave National Park/lwt02752 ID. Lee, W.T. 2752 Mammoth Cave National Park, Kentucky. Hippodrome at the new entrance to Mammoth Cave. It is 150 feet wide and 75 feet high. 1925. #1:/Mammoth Cave National Park/lwt02753 ID. Lee, W.T. 2753 Mammoth Cave National Park, Kentucky. Elizabeth's Parlor at the new entrance to Mammoth Cave. 1925. #1:/Mammoth Cave National Park/lwt02755 ID. Lee, W.T. 2755 Mammoth Cave National Park, Kentucky. Solution cavities at the entrance to Elizabeth's Parlor. 1925. #1:/Mammoth Cave National Park/lwt02757 ID. Lee, W.T. 2757 Mammoth Cave National Park, Kentucky. Alice's Grotto. 1925. #1:/Mammoth Cave National Park/lwt02758 ID. Lee, W.T. 2758 Mammoth Cave National Park, Kentucky. Hovey's Cathedral is 60 feet in Diameter and 200 feet high. 1925. #1:/Mammoth Cave National Park/lwt02760 ID. Lee, W.T. 2760 Mammoth Cave National Park, Kentucky. Fluted solution channels in Hovey's Cathedral. 1925. #1:/Mammoth Cave National Park/lwt02761 ID. Lee, W.T. 2761 Mammoth Cave National Park, Kentucky. Spray-covered needles in Hovey's Cathedral. 1925. #1:/Mammoth Cave National Park/lwt02762 ID. Lee, W.T. 2762 Mammoth Cave National Park, Kentucky. Grape Arbor. 1925. #1:/Mammoth Cave National Park/lwt02763 ID. Lee, W.T. 2763 Mammoth Cave National Park, Kentucky. Mother's Shawl and Pyramid. 1925. #1:/Mammoth Cave National Park/lwt02766 ID. Lee, W.T. 2766 Mammoth Cave National Park, Kentucky. Frozen Niagara. 1925. #1:/Mammoth Cave National Park/lwt02767 ID. Lee, W.T. 2767 Mammoth Cave National Park, Kentucky. Frozen Niagara, viewed from it's base. 1925. #1:/Mammoth Cave National Park/lwt02768 ID. Lee, W.T. 2768 Mammoth Cave National Park, Kentucky. Fairy Fountain. 1925. #1:/Mammoth Cave National Park/lwt02770 ID. Lee, W.T. 2770 Mammoth Cave National Park, Kentucky. Formation at the top of Frozen Niagara. 1925. #1:/Mammoth Cave National Park/lwt02771 ID. Lee, W.T. 2771 Mammoth Cave National Park, Kentucky. Onyx Avenue. 1925. #1:/Mammoth Cave National Park/lwt02775 ID. Lee, W.T. 2775 Mammoth Cave National Park, Kentucky. Interior of Crystal Cave. 1925. #1:/Mammoth Cave National Park/lwt02776 ID. Lee, W.T. 2776 Mammoth Cave National Park, Kentucky. Gypsum flowers in Crystal Cave. 1925. #1:/Mammoth Cave National Park/lwt02777 ID. Lee, W.T. 2777 Mammoth Cave National Park, Kentucky. Grand Canyon in Crystal Cave. 1925. #1:/Mammoth Cave National Park/lwt02778 ID. Lee, W.T. 2778 Mammoth Cave National Park, Kentucky. Gypsum and onyx in Crystal Cave. 1925. #1:/Mammoth Cave National Park/lwt02779 ID. Lee, W.T. 2779 Mammoth Cave National Park, Kentucky. "Natural writing" - calcite in cracks in Crystal Cave. 1925. #1:/Mammoth Cave National Park/lwt02780 ID. Lee, W.T. 2780 Mammoth Cave National Park, Kentucky. Crystal Cave utilized as a refrigerator. Canned fruit in cold storage. 1925. #1:/Mammoth Cave National Park/lwt02781 ID. Lee, W.T. 2781 Mammoth Cave National Park, Kentucky. Gypsum and onyx crusted walls in Crystal Cave. 1925. #1:/Mammoth Cave National Park/lwt02783 ID. Lee, W.T. 2783 Mammoth Cave National Park, Kentucky. Horseshoe Dome in Colossal Cave 1925. #1:/Mammoth Cave National Park/lwt02784 ID. Lee, W.T. 2784 Mammoth Cave National Park, Kentucky. Lizard Spring in Colossal Cave. 1925. #1:/Mammoth Cave National Park/lwt02785 ID. Lee, W.T. 2785 Mammoth Cave National Park, Kentucky. Vaughan's Dome in Colossal Cave. 1925. #1:/Mammoth Cave National Park/lwt02786 ID. Lee, W.T. 2786 Mammoth Cave National Park, Kentucky. Solution needles at Vaughan's Dome in Colossal Cave. 1925. #1:/Mammoth Cave National Park/lwt02787 ID. Lee, W.T. 2787 Mammoth Cave National Park, Kentucky. Bats spend the day at Bat Hall in Colossal Cave 1925. #1:/Mammoth Cave National Park/lwt02789 ID. Lee, W.T. 2789 Mammoth Cave National Park, Kentucky. Entrance to Bicycle Alley in Colossal Cave. 1925. #1:/Mammoth Cave National Park/lwt02790 ID. Lee, W.T. 2790 Mammoth Cave National Park, Kentucky. Bottom of Colossal Dome in Colossal Cave. 1925. #1:/Mammoth Cave National Park/lwt02791 ID. Lee, W.T. 2791 Mammoth Cave National Park, Kentucky. Entrance to Colossal Dome in Colossal Cave. 1925. #1:/Mammoth Cave National Park/lwt02793 ID. Lee, W.T. 2793 Mammoth Cave National Park, Kentucky. Pearly Pool in Colossal Cave. 1925. #1:/Mammoth Cave National Park/lwt02794 ID. Lee, W.T. 2794 Mammoth Cave National Park, Kentucky. The Cat near Pearly Pool in Colossal Cave. 1925. #1:/Mammoth Cave National Park/lwt02795 ID. Lee, W.T. 2795 Mammoth Cave National Park, Kentucky. Wall in Pearly Pool in Colossal Cave. 1925. #1:/Mammoth Cave National Park/lwt02797 ID. Lee, W.T. 2797 Mammoth Cave National Park, Kentucky. Solution channels in the ceiling of Colossal Cave. 1925. #1:/Mammoth Cave National Park/lwt02799 ID. Lee, W.T. 2799 Mammoth Cave National Park, Kentucky. Chinese Room in Colossal Cave. 1925. #1:/Mammoth Cave National Park/lwt02801 ID. Lee, W.T. 2801 Mammoth Cave National Park, Kentucky. Main avenue of Salts Cave. 1925. #1:/Mammoth Cave National Park/lwt02802 ID. Lee, W.T. 2802 Mammoth Cave National Park, Kentucky. Solution channel in Salts Cave. 1925. #1:/Mammoth Cave National Park/lwt02803 ID. Lee, W.T. 2803 Mammoth Cave National Park, Kentucky. Mummy Valley in Salts Cave where a mummy was found. 1925. #1:/Mammoth Cave National Park/lwt02804 ID. Lee, W.T. 2804 Mammoth Cave National Park, Kentucky. One of the log cabins at the Club House over Salts Cave. 1925. #1:/Mammoth Cave National Park/lwt02805 ID. Lee, W.T. 2805 Mammoth Cave National Park, Kentucky. Group of tourist seated near the entrance to Great Onyx Cave. 1925. #1:/Mammoth Cave National Park/lwt02806 ID. Lee, W.T. 2806 Mammoth Cave National Park, Kentucky. Interior of Mammoth Onyx Cavern, near its entrance. 1925. #1:/Mammoth Cave National Park/lwt02807 ID. Lee, W.T. 2807 Mammoth Cave National Park, Kentucky. Interior of Mammoth Onyx Cavern. 1925. #1:/Mammoth Cave National Park/lwt02808 ID. Lee, W.T. 2808 Mammoth Cave National Park, Kentucky. Interior of Mammoth Onyx Cavern. 1925. #1:/Mammoth Cave National Park/lwt02809 ID. Lee, W.T. 2809 Mammoth Cave National Park, Kentucky. Interior of Mammoth Onyx Cavern. 1925. #1:/Mammoth Cave National Park/lwt02810 ID. Lee, W.T. 2810 Mammoth Cave National Park, Kentucky. Saltpeter vats and Booth's Theater. 1925. #1:/Mammoth Cave National Park/lwt02814 ID. Lee, W.T. 2814 Mammoth Cave National Park, Kentucky. Wall in Violet City. 1925. #1:/Mammoth Cave National Park/lwt02816 ID. Lee, W.T. 2816 Mammoth Cave National Park, Kentucky. Onyx Chamber in Great Onyx Cave. 1925. #1:/Mammoth Cave National Park/lwt02818 ID. Lee, W.T. 2818 Mammoth Cave National Park, Kentucky. Onyx Chamber in Great Onyx Cave. 1925. #1:/Mammoth Cave National Park/lwt02819 ID. Lee, W.T. 2819 Mammoth Cave National Park, Kentucky. Hanging Garden in Great Onyx Cave. 1925. #1:/Mammoth Cave National Park/lwt02820 ID. Lee, W.T. 2820 Mammoth Cave National Park, Kentucky. Hotel guests and part of the front of Edward's Great Onyx Hotel at Great Onyx Cave. 1925. #1:/Mammoth Cave National Park/lwt02821 ID. Lee, W.T. 2821 Mammoth Cave National Park, Kentucky. Probably members of the National Parks Commission at Horseshoe Dome in Colossal Cave. 1925. #1:/Mammoth Cave National Park/lwt02823 ID. Lee, W.T. 2823 Mammoth Cave National Park, Kentucky. Avenue near the new entrance to Mammoth Cave. 1925. #1:/Mammoth Cave National Park/lwt02824 ID. Lee, W.T. 2824 Mammoth Cave National Park, Kentucky. Tut's Tomb near the new entrance to Mammoth Cave. 1925. #1:/Mammoth Cave National Park/lwt02825 ID. Lee, W.T. 2825 Mammoth Cave National Park, Kentucky. Top of Frozen Niagara Falls. 1925. #1:/Mammoth Cave National Park/lwt02827 ID. Lee, W.T. 2827 Mammoth Cave National Park, Kentucky. Proctor's Cave near the new entrance to Mammoth Cave. 1925. #1:/Mammoth Cave National Park/lwt02830 ID. Lee, W.T. 2830 Mammoth Cave National Park, Kentucky. Rotunda in Mammoth Cave. 1925. #1:/Mammoth Cave National Park/lwt02832 ID. Lee, W.T. 2832 Mammoth Cave National Park, Kentucky. Olive Bower. 1925. #1:/Mammoth Cave National Park/lwt02835 ID. Lee, W.T. 2835 Mammoth Cave National Park, Kentucky. Mammoth Dome. 1925. #1:/Mammoth Cave National Park/lwt02840 ID. Lee, W.T. 2840 Mammoth Cave National Park, Kentucky. Main avenue in Higenbethem's Cave. 1925. #1:/Mammoth Cave National Park/lwt02841 ID. Lee, W.T. 2841 Mammoth Cave National Park, Kentucky. Decorations in Higenbethem's Cave. 1925. #1:/Mammoth Cave National Park/lwt02843 ID. Lee, W.T. 2843 Mammoth Cave National Park, Kentucky. Onyx decorations in Higenbethem's Cave. 1925. #1:/Mammoth Cave National Park/lwt02844 ID. Lee, W.T. 2844 Mammoth Cave National Park, Kentucky. Onyx decorations in Higenbethem's Cave. 1925. #1:/Mammoth Cave National Park/lwt02846 ID. Lee, W.T. 2846 Mammoth Cave National Park, Kentucky. Interior of White's Cave. 1925. #1:/Mammoth Cave National Park/lwt02847 ID. Lee, W.T. 2847 Mammoth Cave National Park, Kentucky. Interior of White's Cave. 1925. #1:/Mammoth Cave National Park/lwt02850 ID. Lee, W.T. 2850 Mammoth Cave National Park, Kentucky. Interior of White's Cave. 1925. #1:/Mammoth Cave National Park/lwt02851 ID. Lee, W.T. 2851 Mammoth Cave National Park, Kentucky. Interior of White's Cave. 1925. #1:/Mammoth Cave National Park/lwt02852 ID. Lee, W.T. 2852 Mammoth Cave National Park, Kentucky. Styx River outlet from Mammoth Cave. 1925. #1:/Mammoth Cave National Park/lwt02853 ID. Lee, W.T. 2853 Mammoth Cave National Park, Kentucky. Styx River outlet from Mammoth Cave. 1925. #1:/Mammoth Cave National Park/lwt02854 ID. Lee, W.T. 2854 Mammoth Cave National Park, Kentucky. Mammoth Cave Railroad Company enroute to Mammoth Cave. 1925. #1:/Mammoth Cave National Park/lwt02855 ID. Lee, W.T. 2855 Mammoth Cave National Park, Kentucky. Small boat in the Green River at Mammoth Cave Landing. 1925. #1:/Mammoth Cave National Park/lwt02857 ID. Lee, W.T. 2857 Mammoth Cave National Park, Kentucky.W.T. Lee admiring the entrance to Mammoth Onyx Cave near Horse Cave. 1925. #1:/Mammoth Cave National Park/lwt02860 ID. Lee, W.T. 2860 Mammoth Cave National Park, Kentucky. Interior of Mammoth Onyx Cave near Horse Cave. 1925. #1:/Mammoth Cave National Park/lwt02863 ID. Lee, W.T. 2863 Mammoth Cave National Park, Kentucky. Stairway entrance to Horse Cave. 1925. #1:/Mammoth Cave National Park/lwt02864 ID. Lee, W.T. 2864 Mammoth Cave National Park, Kentucky. Part of the tennis court in the sink of Horse Cave. 1925. #1:/Mammoth Cave National Park/lwt02866 ID. Lee, W.T. 2866 Mammoth Cave National Park, Kentucky. National Park Commission in Vaughan's Dome. 1925. #1:/Mammoth Cave National Park/lwt02869 ID. Lee, W.T. 2869 Mammoth Cave National Park, Kentucky.W.T. Lee inspecting the new entrance to Mammoth Cave. 1925. #1:/Mammoth Cave National Park/lwt02871 ID. Lee, W.T. 2871 Mammoth Cave National Park, Kentucky. Lover's Leap near the new entrance to Mammoth Cave. 1925. #1:/Mammoth Cave National Park/lwt02873 ID. Lee, W.T. 2873 Mammoth Cave National Park, Kentucky. Great solution dome in the Radio Room near the new entrance to Mammoth Cave. 1925. #1:/Mammoth Cave National Park/lwt02874 ID. Lee, W.T. 2874 Mammoth Cave National Park, Kentucky. Onyx formation in the Radio Room. 1925. #1:/Mammoth Cave National Park/lwt02875 ID. Lee, W.T. 2875 Mammoth Cave National Park, Kentucky. Onyx formation in the Radio Room. 1925. #1:/Mammoth Cave National Park/lwt02876 ID. Lee, W.T. 2876 Mammoth Cave National Park, Kentucky. Side of Tut's Tomb. 1925. #1:/Mammoth Cave National Park/lwt02878 ID. Lee, W.T. 2878 Mammoth Cave National Park, Kentucky. Decorations in Tut's Tomb. 1925. #1:/Mammoth Cave National Park/lwt02879 ID. Lee, W.T. 2879 Mammoth Cave National Park, Kentucky. Gypsum flowers. 1925. #1:/Mammoth Cave National Park/lwt02880 ID. Lee, W.T. 2880 Mammoth Cave National Park, Kentucky. Gypsum flowers. 1925. #1:/Mammoth Cave National Park/lwt02885 ID. Lee, W.T. 2885 Mammoth Cave National Park, Kentucky, Looking out the entrance to Mammoth Cave. 1925. #1:/Mammoth Cave National Park/lwt02887 ID. Lee, W.T. 2887 Mammoth Cave National Park, Kentucky. Iron gate at the old(?) entrance to Mammoth Cave. 1925. #1:/Mammoth Cave National Park/lwt02890 ID. Lee, W.T. 2890 Mammoth Cave National Park, Kentucky. Hotel and grounds at Mammoth Cave. 1925. #1:/Mammoth Cave National Park/lwt02892 ID. Lee, W.T. 2892 Mammoth Cave National Park, Kentucky. Rocks fallen from the roof in Mammoth Cave. 1925. #1:/Mammoth Cave National Park/lwt02893 ID. Lee, W.T. 2893 Mammoth Cave National Park, Kentucky. Old stone building inside Mammoth Cave. 1925. #1:/Mammoth Cave National Park/lwt02894 ID. Lee, W.T. 2894 Mammoth Cave National Park, Kentucky. Graffiti on cave walls in Mammoth Cave. 1925. #1:/Mammoth Cave National Park/lwt02895 ID. Lee, W.T. 2895 Mammoth Cave National Park, Kentucky. Temple of Karnak in Mammoth Cave. 1925. #1:/Mammoth Cave National Park/lwt02901 ID. Lee, W.T. 2901 Mammoth Cave National Park, Kentucky. Flow deposit in the Chinese Room in Colossal Cave. 1925. #1:/Mammoth Cave National Park/lwt02902 ID. Lee, W.T. 2902 Mammoth Cave National Park, Kentucky. Buildings and grounds of Colossal Cave. 1925. #1:/Mammoth Cave National Park/lwt02905 ID. Lee, W.T. 2905 Mammoth Cave National Park, Kentucky. The Cat in the Onyx Chamber in Colossal Cave. 1925. #1:/Mammoth Cave National Park/lwt02906 ID. Lee, W.T. 2906 Mammoth Cave National Park, Kentucky. Fossil Waterfall in White's Cave. 1925. #1:/Mesa Verde National Park/lwt03025 ID. Lee, W.T. 3025 Mesa Verde National Park, Colorado. Spruce Tree House. 1925. #1:/Mesa Verde National Park/lwt03026 ID. Lee, W.T. 3026 Mesa Verde National Park, Colorado. Spruce Tree House. 1925. #1:/Mesa Verde National Park/lwt03030 ID. Lee, W.T. 3030 Mesa Verde National Park, Colorado. View across Fewkes Canyon toward Sun Temple. 1925. #1:/Mesa Verde National Park/lwt03061 ID. Lee, W.T. 3061 Mesa Verde National Park, Colorado. Point Lookout 1925. #1:/Natural Bridges National Monument/lwt03120 ID. Lee, W.T. 3120 Natural Bridges National Monument, Utah. One of the abutments beneath Edwin (Owachomo) Bridge. Circa 1925. #1:/Natural Bridges National Monument/lwt03121 ID. Lee, W.T. 3121 Natural Bridges National Monument, Utah. Dan Perkins standing on his horse "Cap" on top of Owachomo Bridge. Circa 1925. #1:/Natural Bridges National Monument/lwt03123 ID. Lee, W.T. 3123 Natural Bridges National Monument, Utah. Dan Perkins on his horse "Cap" on top of Owachomo Bridge. Circa 1925. #1:/Natural Bridges National Monument/lwt03127 ID. Lee, W.T. 3127 Natural Bridges National Monument, Utah. Dan Perkins on his horse "Cap" on top of Owachomo Bridge. Circa 1925. #1:/Natural Bridges National Monument/lwt03135 ID. Lee, W.T. 3135 Natural Bridges National Monument, Utah. Kachina Natural Bridge in Cedar Mesa Sandstone at White Canyon. Circa 1925. Plate 21, U.S. Geological Survey Professional paper 188. #1:/Natural Bridges National Monument/lwt03137 ID. Lee, W.T. 3137 Natural Bridges National Monument, Utah. Kachina Natural Bridge, viewed from the side opposite photo lwt03135. Stream bed in the foreground. Circa 1925. #1:/Natural Bridges National Monument/lwt03140 ID. Lee, W.T. 3140 Natural Bridges National Monument, Utah. Cross-bedded Cedar Mesa(?) Sandstone in a canyon near Caroline (Kachina) Bridge. Circa 1925. #1:/Natural Bridges National Monument/lwt03142 ID. Lee, W.T. 3142 Natural Bridges National Monument, Utah. Cliff dwelling. Circa 1925. #1:/Natural Bridges National Monument/lwt03143 ID. Lee, W.T. 3143 Natural Bridges National Monument, Utah. Sipapu Bridge. Circa 1925. #1:/Natural Bridges National Monument/lwt03144 ID. Lee, W.T. 3144 Natural Bridges National Monument, Utah. Sipapu Bridge. 1925. #1:/Natural Bridges National Monument/lwt03145 ID. Lee, W.T. 3145 Natural Bridges National Monument, Utah. Sipapu Bridge. Circa 1925. #1:/Natural Bridges National Monument/lwt03150 ID. Lee, W.T. 3150 Natural Bridges National Monument, Utah. Pack train on the move beneath Sipapu Bridge. Circa 1925. #1:/Natural Bridges National Monument/lwt03163 ID. Lee, W.T. 3163 Natural Bridges National Monument, Utah. North abutment of Sipapu Bridge. Circa 1925. #1:/Natural Bridges National Monument/lwt03164 ID. Lee, W.T. 3164 Natural Bridges National Monument, Utah. North abutment of Sipapu Bridge. Circa 1925. #1:/Natural Bridges National Monument/lwt03167 ID. Lee, W.T. 3167 Natural Bridges National Monument, Utah. Pictograph near a cliff dwelling close to Owachomo Bridge. Circa 1925. #1:/Yellowstone National Park/lwt2396a ID. Lee, W.T. 2396a Yellowstone National Park, Wyoming. Bunsen Peak west of Golden Gate. 1923. #1:/Ahland R.W. Collection-Mount St. Helens*msh198007/mahl0003 ID. Mount St. Helens Ahland, R.W. 3ct Crater on north face of Mount St. Helens. Skamania County, Washington. July 26, 1980. #1:/Ahland R.W. Collection-Mount St. Helens*msh198007/mahl0016 ID. Mount St. Helens Ahland, R.W. 16ct Entire volcano from northeast showing breach on north face. Skamania County, Washington. July 26, 1980. #1:/Ahland R.W. Collection-Mount St. Helens*msh198007/mahl0020 ID. Mount St. Helens Ahland, R.W. 20ct Volcano from north and slightly east showing pyroclastic flow through breach in north face. Foreground includes bottom of mountain. Skamania County, Washington. July 26, 1980. #1:/Ahland R.W. Collection-Mount St. Helens*msh198007/mahl0022 ID. Mount St. Helens Ahland, R.W. 22ct Newly formed lake northeast of volcano. View is to the south. Skamania County, Washington. July 26, 1980. #1:/Banks N.G. Collection-Mount St. Helens*msh198005/mban0001 ID. Mount St. Helens Banks, N. 1ct Mount St. Helens from Coldwater II observation station. Clouds cover top portion of mountain. Skamania County, Washington. May 6, 1980. #1:/Banks N.G. Collection-Mount St. Helens*msh198005/mban0002 ID. Mount St. Helens Banks, N. 2ct East over crater of Mount St. Helens. Skamania County, Washington. May 8, 1980. #1:/Banks N.G. Collection-Mount St. Helens*msh198005/mban0003 ID. Mount St. Helens Banks, N. 3ct Looking north on edge of blowdown; northeast edge of North Toutle River after May 18 eruption of Mount St. Helens. Cowlitz County, Washington. May 19, 1980. #1:/Banks N.G. Collection-Mount St. Helens*msh198005/mban0004 ID. Mount St. Helens Banks, N. 4ct North Toutle River mudflow after May 18 eruption of Mount St. Helens. Skamania County, Washington. May 19, 1980. #1:/Banks N.G. Collection-Mount St. Helens*msh198005/mban0006 ID. Mount St. Helens Banks, N. 6ct Pipe vesicle in hurricane pyroclastic flow of Mount St. Helens. Skamania County, Washington. May 22, 1980. #1:/Banks N.G. Collection-Mount St. Helens*msh198005/mban0007 ID. Mount St. Helens Banks, N. 7ct Desiccation cracks, rain drop prints on top of pipe vesicle at Boy Scout Bench, Mount St. Helens. Skamania County, Washington. May 22, 1980. #1:/Banks N.G. Collection-Mount St. Helens*msh198005/mban0008 ID. Mount St. Helens Banks, N. 8ct Rick Hoblitt on mudflow at Boy Scout Bench, Mount St. Helens. Skamania County, Washington. May 22, 1980. #1:/Banks N.G. Collection-Mount St. Helens*msh198005/mban0009 ID. Mount St. Helens Banks, N. 9ct Mudflow northeast side of Boy Scout Bench, Mount St. Helens. Skamania County, Washington. May 22, 1980. #1:/Banks N.G. Collection-Mount St. Helens*msh198005/mban0010 ID. Mount St. Helens Banks, N. 10ct Boy Scout Bench, Mount St. Helens. Skamania County, Washington. May 22, 1980. #1:/Banks N.G. Collection-Mount St. Helens*msh198005/mban0011 ID. Mount St. Helens Banks, N. 11ct Southeast view of Mount St. Helens from Coldwater II observation station. Skamania County, Washington. May 23, 1980. #1:/Banks N.G. Collection-Mount St. Helens*msh198005/mban0012 ID. Mount St. Helens Banks, N. 12ct North from pumice flow. Temperature site PT5-18-PF81, Mount St. Helens. Skamania County, Washington. May 23, 1980. #1:/Banks N.G. Collection-Mount St. Helens*msh198005/mban0013 ID. Mount St. Helens Banks, N. 13ct Blast and pumice flow, Coldwater interfluve near Mount St. Helens. Skamania County, Washington. May 24, 1980. #1:/Banks N.G. Collection-Mount St. Helens*msh198005/mban0014 ID. Mount St. Helens Banks, N. 14ct DF3 site, Mount St. Helens, view south. Skamania County, Washington. May 29, 1980. #1:/Banks N.G. Collection-Mount St. Helens*msh198005/mban0015 ID. Mount St. Helens Banks, N. 15ct DF5 site, Mount St. Helens, view east. Skamania County, Washington. May 29, 1980. #1:/Banks N.G. Collection-Mount St. Helens*msh198005/mban0016 ID. Mount St. Helens Banks, N. 16ct West across crater of Mount St. Helens. Skamania County, Washington. May 31, 1980. #1:/Banks N.G. Collection-Mount St. Helens*msh198005/mban0017 ID. Mount St. Helens Banks, N. 17ct Sugar Bowl E site, northeast of Mount St. Helens. May 25 over May 18 pumice. Skamania County, Washington. May 31, 1980. #1:/Banks N.G. Collection-Mount St. Helens*msh198006/mban0018 ID. Mount St. Helens Banks, N. 18ct East at blast, pyroclastic flow overlying the debris flow. Bench below Coldwater II BPF4, north of Mount St. Helens. Skamania County, Washington. June 3, 1980. #1:/Banks N.G. Collection-Mount St. Helens*msh198006/mban0019 ID. Mount St. Helens Banks, N. 19ct View east at stump, east side of Boy Scout Bench BPF1, Mount St. Helens. Skamania County, Washington. June 3, 1980. #1:/Banks N.G. Collection-Mount St. Helens*msh198006/mban0020 ID. Mount St. Helens Banks, N. 20ct Northwest at Boy Scout Bench BPF1, Mount St. Helens. Skamania County, Washington. June 3, 1980. #1:/Banks N.G. Collection-Mount St. Helens*msh198006/mban0021 ID. Mount St. Helens Banks, N. 21ct Mudflow with levees on Studebaker Creek, north of Mount St. Helens. Skamania County, Washington. June 5, 1980. #1:/Banks N.G. Collection-Mount St. Helens*msh198006/mban0022 ID. Mount St. Helens Banks, N. 22ct North side of Spud Mountain at equipment site, northwest of Mount St. Helens. Cowlitz County, Washington. June 5, 1980. #1:/Banks N.G. Collection-Mount St. Helens*msh198006/mban0023 ID. Mount St. Helens Banks, N. 23ct Melted tail light of truck on north side of Spud Mountain at equipment site, northwest of Mount St. Helens. Cowlitz County, Washington. June 5, 1980. #1:/Banks N.G. Collection-Mount St. Helens*msh198006/mban0024 ID. Mount St. Helens Banks, N. 24ct Damaged "steam shovel" on north side of Spud Mountain, northwest of Mount St. Helens. Cowlitz County, Washington. June 5, 1980. #1:/Banks N.G. Collection-Mount St. Helens*msh198006/mban0025 ID. Mount St. Helens Banks, N. 25ct Damaged Caterpillars on south side of Elk Rock, northwest of Mount St. Helens. Cowlitz County, Washington. June 5, 1980. #1:/Banks N.G. Collection-Mount St. Helens*msh198006/mban0026 ID. Mount St. Helens Banks, N. 26ct Stratigraphy near Smith Creek BPF7, east of Mount St. Helens. Skamania County, Washington. June 5, 1980. #1:/Banks N.G. Collection-Mount St. Helens*msh198006/mban0027 ID. Mount St. Helens Banks, N. 27ct Section at Curtis Lake, northeast of Mount St. Helens, from top to bottom: D, C, B, Pisolite Blast A3, Blast A2, Blast A1, T. 80-5-18BPF11. Skamania County, Washington. June 8, 1980. #1:/Banks N.G. Collection-Mount St. Helens*msh198006/mban0030 ID. Mount St. Helens Banks, N. 30ct Recovery of time lapse camera at Coldwater I observation station, Mount St. Helens. Cowlitz County, Washington. June 11, 1980. #1:/Banks N.G. Collection-Mount St. Helens*msh198005/mban0032 ID. Mount St. Helens Banks, N. 32ct Aerial view looking northwest at pumice apron, Mount St. Helens. Skamania County, Washington. May 22, 1980. #1:/Post A.S. Collection-Mount St. Helens*msh1967/mbmm0001 ID. Mount St. Helens - Brugman, M.M. 1 Aerial view of Mount St. Helens from the northeast before the 1980 eruptive activity. Dashed line marks boundary of area removed by the May 18 blast. Photo 67L7-14 by Austin Post. Skamania County, Washington. September 18, 1967. Figure 4 in U.S. Geological Survey. Circular 850-D. 1981. #1:/Hirst D. Collection-Mount St. Helens*msh198005/mbmm0002 ID. Mount St. Helens - Brugman, M.M. 2 Aerial view of Mount St. Helens from the northeast during the period of deformation and minor eruptions preceding the cataclysmic eruption of May 18. The area of mountain bulging to the north is outlined. Note the extensive crevassing of glaciers on this bulge. Much of the snow and ice is darkened by ash fall. Photo 80SZ-140 by David Hirst. Skamania County, Washington. May 1, 1980. Figure 5 in U.S. Geological Survey. Circular 850-D. 1981. #1:/Post A.S. Collection-Mount St. Helens*msh198007/mbmm0003 ID. Mount St. Helens - Brugman, M.M. 3 Aerial view of Mount St. Helens from the northeast following the May 18, 1980 eruption. All remaining snow and glacier ice has been covered by ash and other volcanic materials, but the tongue of Forsyth Glacier is clearly discernible below and to the right of Dogs Head. Timberline road and parking areas, deeply buried under ash and debris, are outlined Photo 8059-227 by Austin Post. Skamania County, Washington. July 24, 1980. Figure 6 in U.S. Geological Survey. Circular 850-D. 1981. #1:/Post A.S. Collection-Mount St. Helens*msh198007/mbmm0004 ID. Mount St. Helens - Brugman, M.M. 4 Aerial view of crater rim following the May 18 eruption. Arrows above the far rim indicate exposed cross sections (left to right) of Forsyth, Nelson, Ape, and Shoestring Glaciers. The horizontal arrow on the near slope indicates typical rills and channels through ash deposits into Talus Glacier (note crevasse further down the glacier). Dark (wet) streaks to the left indicate the ash covered Toutle Glacier. Photo 8059-115 by Austin Post. Skamania County, Washington. July 24, 1980. Figure 7 in U.S. Geological Survey. Circular 850-D. 1981. #1:/Krimmel R.M. Collection-Mount St. Helens*msh198008/mbmm0005 ID. Mount St. Helens - Brugman, M.M. 5 Aerial view. Glaciers on Mount St. Helens following the May 18, 1980 eruption are difficult to detect because of the heavy cover of ash and other volcano nic debris. The arrow points to typical glacier crevasses, penetrating through the ash from Swift Glacier on the south side of the mountain. Photo 8059-303 by Robert Krimmel. Skamania County, Washington. August 7, 1980. Figure 8 in U.S. Geological Survey. Circular 850-D. 1981. #1:/Brugman M. Collection-Mount St. Helens*msh1979/mboe0001 ID. Mount St. Helens - mboe, 1cp Mount St. Helens. Photo by M. Brugman; Caltech. Skamania County, Washington. July 1979. #1:/Brugman M. Collection-Mount St. Helens*msh198005/mboe0002 ID. Mount St. Helens - mboe, 2cp Aerial view of Mount St. Helens and new crater after the eruption of May 18. Photo by M. Brugman, Caltech. Skamania County, Washington. May 29, 1980. #1:/Glicken H.C. Collection-Mount St. Helens*msh198005/mboe0003 ID. Mount St. Helens - mboe, 3cp Geologist Dave Johnston at Coldwater II. Photo by H. Glicken Skamania County, Washington. May 17, 1980 #1:/Tilling R.I. Collection-Mount St. Helens*msh198005/mboe0004 ID. Mount St. Helens - mboe, 4cp Aerial view of bulge on the north slope. Sugar Bowl on left (east) side of bulge; Goat Rocks on right (west) side. Photo by R. Tilling Skamania County, Washington. May 3, 1980. #1:/Endo E.T. Collection-Mount St. Helens*msh198004/mboe0005 ID. Mount St. Helens - mboe, 5cp Aerial view. Dark mudflow contrasts with fresh white snow on the mountain. Photo by Elliot Endo. Skamania County, Washington. April 11, 1980. #1:/Endo E.T. Collection-Mount St. Helens*msh198004/mboe0006 ID. Mount St. Helens - mboe, 6cp Seismologist installing changing reel on magnetic recorder. Photo by Elliot Endo Skamania County, Washington. April 12, 1980. #1:/Endo E.T. Collection-Mount St. Helens*msh198004/mboe0007 ID. Mount St. Helens - mboe, 7cp Five-day automatic magnetic tape recording unit records data detected by seismometers. Photo by Elliot Endo. Skamania County, Washington. April 12, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198005/mboe0008 ID. Mount St. Helens - mboe, 8cp Minor steam eruption from summit crater, from northeast, 10:15 a.m. Photo by T. Casadevall. Skamania County, Washington. May 31, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198005/mboe0009 ID. Mount St. Helens - mboe, 9cp Aerial view of minor steam eruption from summit crater, viewed from northeast, 10:15 a.m Photo by T. Casadevall. Skamania County, Washington. May 31, 1980. #1:/Dzurisin D. Collection-Mount St. Helens*msh198005/mboe0010 ID. Mount St. Helens - mboe, 10cp Aerial view of summit crater. Volcanic septum is visible to the right of the steam eruption cloud. Photo by D. Dzurisin. Skamania County, Washington. May 30, 1980. #1:/Dzurisin D. Collection-Mount St. Helens*msh198005/mboe0011 ID. Mount St. Helens - mboe, 11cp Phreatic vents in debris flow near the former site of Spirit Lake Lodge. Photo by D. Dzurisin. Skamania County, Washington. May 29, 1980 #1:/Dzurisin D. Collection-Mount St. Helens*msh198005/mboe0012 ID. Mount St. Helens - mboe, 12cp Aerial view of mudflow deposits and damage along the north bank, North Fork Toutle River Photo by D. Dzurisin. Cowlitz County, Washington. May 26, 1980. #1:/Dzurisin D. Collection-Mount St. Helens*msh198005/mboe0013 ID. Mount St. Helens - mboe, 13cp Logs and other debris rammed against the I-5 bridge over the North Fork Toutle River. Photo by D. Dzurisin. Cowlitz County, Washington. May 26, 1980 #1:/Dzurisin D. Collection-Mount St. Helens*msh198005/mboe0014 ID. Mount St. Helens - mboe, 14cp Aerial view of areas of damage from flooding and silting aof the Cowlitz River near Longview, Washington. Cowlitz County, Washington. May 29, 1980. Photo by D. Dzurisin) #1:/DeVine J. Collection-Mount St. Helens*msh198006/mboe0015 ID. Mount St. Helens - mboe, 15cp Log and mudflow in the vicinity of Mount St. Helens. View includes geologist and helicopter. Photo by J. DeVine. Skamania County, Washington. June 1980. #1:/DeVine J. Collection-Mount St. Helens*msh198006/mboe0016 ID. Mount St. Helens - mboe, 16cp Aerial view; massive blowdown of trees in the Green River valley resulted from the May 18 eruption. Photo by J. DeVine. Washington. June 2, 1980. #1:/Dzurisin D. Collection-Mount St. Helens*msh198006/mboe0017 ID. Mount St. Helens - mboe, 17cp Blowdown of trees in Green River valley from the May 18 "blast". Photo by D. Dzurisin. Washington. June 2, 1980 #1:/DeVine J. Collection-Mount St. Helens*msh198006/mboe0018 ID. Mount St. Helens - mboe, 18cp Aerial view of scattered remnants of logging operation north of Mount St. Helens. This clear-cut area was buried in several feet of ash from the May 18 eruption. Photo by J. DeVine. Skamania County, Washington. June 1980. #1:/DeVine J. Collection-Mount St. Helens*msh198006/mboe0019 ID. Mount St. Helens - mboe, 19cp Aerial view of barren slope devastated by May 18 eruption. Photo by J. DeVine. Skamania County, Washington. June 1980 #1:/Dzurisin D. Collection-Mount St. Helens*msh198005/mboe0020 ID. Mount St. Helens - mboe, 20cp Near view of tree splintered by force of the "blast" associated with the May 18 eruption. Photo by D. Dzurisin. Skamania County, Washington. May 30, 1980. #1:/Dzurisin D. Collection-Mount St. Helens*msh198005/mboe0021 ID. Mount St. Helens - mboe, 21cp Near view of car buried in four feet of volcanic ash from the May 18 eruption. Location is at Coldwater I camp, 6.5 miles northwest of Mount St. Helens summit. Photo by D. Dzurisin. Cowlitz County, Washington. May 31, 1980. #1:/Dzurisin D. Collection-Mount St. Helens*msh198005/mboe0022 ID. Mount St. Helens - mboe, 22cp Near view of truck and horse trailer plastered with volcanic ash near Ryan Lake. Photo by D. Dzurisin. Skamania County, Washington. May 27, 1980. #1:/Mount St. Helens*msh198006/mboe0023 ID. Mount St. Helens - mboe, 23cp Elaborate air filtration system added to automobile in the Moses Lake, Washington area. May techniques were tried to keep the ash out of mechanical systems - they didn't work for long. Grant County, Washington. June 1980. #1:/Mount St. Helens*msh1980/mboe0024 ID. Mount St. Helens - Branch of Exhibits 24cp Map of Cook Inlet region, Alaska, showing volcanic eruptions during the last 50 years. 1980. #1:/Mount St. Helens*msh1980/mboe0025 ID. Mount St. Helens - mboe, 25cp Diagram. Drastic sedimentation causes potential flood hazard. Cowlitz River. Cowlitz County, Washington. 1980. #1:/Mount St. Helens*msh198003/mboe0026 ID. Mount St. Helens - mboe, 26cp Map.U.S.G.S. Hydrologic data sites existing prior to March, 1980; sites established March-May, 1980; and sites destroyed May 18, 1980. Washington and Oregon. 1980. #1:/Mount St. Helens*msh1980/mboe0027 ID. Mount St. Helens - mboe, 27cp Diagram. Mount St. Helens eruption, May 18, 1980. Deposition in stream channels of the Toutle and Cowlitz Rivers. Cowlitz County, Washington. 1980. #1:/Mount St. Helens*msh1980/mboe0028 ID. Mount St. Helens - Branch of Exhibits 28cp Satellite imagery showing parts of the Alaska Gulf, Copper River and Cook Inlet regions. Mountains are snow capped. Identified are Mounts Wrangell, Sanford, Drum, Spurr and Hayes Volcano. Alaska n.d. #1:/Mount St. Helens*msh1980/mboe0029 ID. Mount St. Helens - Branch of Exhibits 29cp Satellite imagery showing parts of the Copper River, Southwestern Alaska and Aleutian Regions. The following peaks and volcanoes are identified. Iliama, Augustine, Douglas, Fourpeaked, Kaguyak, Devils Desk, Kukak, Stellar, Denison, Snow, Mt. Griggs (Knife Peak) Novarupta, Mageik, Trident, Martin, Peulik (Ugashik Caldera), Kialagvik, Chiginigak, Anikchak, Black (Purple) Veniaminof, Kupreanof, Dana, Pavlov Sister, Pavlof, Double Crater, Hague, Emmons, Amak, Dutton, Frosty, Walrus (Morzhovoi), Roundtop, Isanotski, Shishaldin, Fisher, Westdahl, Pogramni, Mt. Gilbert (Akun)and Akutan. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198004/mcas0001 ID. Mount St. Helens Casadevall, T. 1ct Geologist Dave Johnston standing by COSPEC airplane. Vancouver, Clark County, Washington. April 4, 1980. Mount St. Helens. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198004/mcas0002 ID. Mount St. Helens Casadevall, T. 2ct Aerial view of Mount St. Helens and drifting plume, from northwest. Photo taken from U.S. Forest Service observer plane at 12:32 p.m. Skamania County, Washington. April 4, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198004/mcas0003 ID. Mount St. Helens Casadevall, T. 3ct Aerial view of Mount St. Helens and drifting plume, looking northeast over Spirit Lake with Mount Rainier in the background, at 12:33 p.m. Skamania, Lewis, and Pierce Counties, Washington. April 4, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198004/mcas0004 ID. Mount St. Helens Casadevall, T. 4ct Aerial view of Mount St. Helens summit with plume dissipated, 1317 hours. Skamania County, Washington. April 4, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198004/mcas0008 ID. Mount St. Helens Casadevall, T. 8ct COSPEC at Timberline parking lot, northeast of Mount St. Helens. Dave Johnston and Larry Malinconico (standing) with equipment. Skamania County, Washington. April 10, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198004/mcas0012 ID. Mount St. Helens Casadevall, T. 12ct Aerial view of Mount St. Helens summit during degassing; no plumes visible. Skamania County, Washington. April 10, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198004/mcas0013 ID. Mount St. Helens Casadevall, T. 13ct Aerial view of Mount St. Helens bulge. Skamania County, Washington. April 16, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198005/mcas0014 ID. Mount St. Helens Casadevall, T. 14ct Rick Hoblitt digging in deposits at South Coldwater Creek after May 18 eruption of Mount St. Helens. Cowlitz and Skamania Counties, Washington. May 20, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198005/mcas0015 ID. Mount St. Helens Casadevall, T. 15ct Deposits on South Coldwater Creek after May 18 eruption of Mount St. Helens. Helicopter and geologist in distance. Cowlitz and Skamania Counties, Washington. May 20, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198005/mcas0016 ID. Mount St. Helens Casadevall, T. 16ct Fumaroles on South Coldwater Creek after May 18 eruption of Mount St. Helens. Pick for scale. Cowlitz and Skamania Counties, Washington. May 20, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198005/mcas0017 ID. Mount St. Helens Casadevall, T. 17ct Section of fumaroles after May 18 eruption of Mount St. Helens. Pick for scale. Cowlitz and Skamania Counties, Washington. May 20, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198005/mcas0018 ID. Mount St. Helens Casadevall, T. 18ct Aerial view of Mount St. Helens and amphitheater; degassing. Skamania County, Washington. May 31, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198005/mcas0020 ID. Mount St. Helens Casadevall, T. 20ct Aerial view of Mount St. Helens and amphitheater; degassing. Skamania County, Washington. May 31, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198006/mcas0024 ID. Mount St. Helens Casadevall, T. 24ct Carolyn Dridger holding leaf showing ash of May 25 eruption of Mount St. Helens. June 1, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198006/mcas0026 ID. Mount St. Helens Casadevall, T. 26ct Solfatara on pyroclastic flow of May 18 eruption of Mount St. Helens. Skamania County, Washington. June 5, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198006/mcas0027 ID. Mount St. Helens Casadevall, T. 27ct Geologist examining fumarole on pyroclastic flow of May 18 eruption of Mount St. Helens. Skamania County, Washington. June 5, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198006/mcas0028 ID. Mount St. Helens Casadevall, T. 28ct Pumice from Mount St. Helens on shore of Columbia River. Washington. June 8, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198006/mcas0029 ID. Mount St. Helens Casadevall, T. 29ct Blast effect of Mount St. Helens eruption. Logs washed up on shore near County Line Peak. Washington. June 8, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198006/mcas0031 ID. Mount St. Helens Casadevall, T. 31ct Stan Williams at fumarole, Mount St. Helens. Skamania County, Washington. June 15, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198006/mcas0032 ID. Mount St. Helens Casadevall, T. 32ct Erosion behind Coldwater II observation station, north of Mount St. Helens. Skamania County, Washington. June 20, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198006/mcas0033 ID. Mount St. Helens Casadevall, T. 33ct Coldwater Lake, north of Mount St. Helens. Cowlitz County, Washington. June 20, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198006/mcas0034 ID. Mount St. Helens Casadevall, T. 34ct Geologist at H2O probe site, Mount St. Helens. Skamania County, Washington. June 20, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198006/mcas0035 ID. Mount St. Helens Casadevall, T. 35ct Degassing, Spirit Lake, north of Mount St. Helens. Skamania County, Washington. June 20, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198006/mcas0036 ID. Mount St. Helens Casadevall, T. 36ct Ash erosion on south flank of Mount St. Helens. Skamania County, Washington. June 20, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198006/mcas0037 ID. Mount St. Helens Casadevall, T. 37ct Aerial view of part of Castle Creek Lake, northwest of Mount St. Helens. Cowlitz County, Washington. June 25, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198006/mcas0038 ID. Mount St. Helens Casadevall, T. 38ct Aerial view of Castle Creek Lake, northwest of Mount St. Helens. Cowlitz County, Washington. June 25, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198006/mcas0039 ID. Mount St. Helens Casadevall, T. 39ct Fumarole on pyroclastic flow of May 18 eruption of Mount St. Helens. Pick for scale. Skamania County, Washington. June 25, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198006/mcas0040 ID. Mount St. Helens Casadevall, T. 40ct Aerial view of revegetation on northwest flank of Mount St. Helens. Skamania County, Washington. June, 25, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198007/mcas0041 ID. Mount St. Helens Casadevall, T. 41ct Fumaroles on pyroclastic flow of May 18 eruption of Mount St. Helens. Pick for scale. Skamania County, Washington. July 1, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198007/mcas0042 ID. Mount St. Helens Casadevall, T. 42ct Fumaroles on pyroclastic flow of May 18 eruption of Mount St. Helens; equipment for scale. Skamania County, Washington. July 1, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198007/mcas0043 ID. Mount St. Helens Casadevall, T. 43ct Fumarole on pyroclastic flow of May 18 eruption of Mount St. Helens. Pick handle for scale. Skamania County, Washington. July 1, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198006/mcas0044 ID. Mount St. Helens Casadevall, T. 44ct Fumaroles on pyroclastic flow of May 18 eruption of Mount St. Helens. Skamania County, Washington. June 1, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198007/mcas0045 ID. Mount St. Helens Casadevall, T. 45ct View from northwest of pyroclastic flow of May 18 eruption of Mount St. Helens. Amphitheater in background. Helicopter at edge of flow in foreground. Skamania County, Washington. July 1, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198007/mcas0046 ID. Mount St. Helens Casadevall, T. 46ct Spirit Lake water sample site, north of Mount St. Helens. Logs covering surface of lake. Mount St. Helens, Skamania County, Washington. July 1, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198007/mcas0047 ID. Mount St. Helens Casadevall, T. 47ct Solfatara on pyroclastic flow of June 12 eruption of Mount St. Helens. Pick for scale. Skamania County, Washington. July 1, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198007/mcas0048 ID. Mount St. Helens Casadevall, T. 48ct Mount St. Helens, partially obscured, from island in Spirit Lake. Skamania County, Washington. July 1, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198007/mcas0049 ID. Mount St. Helens Casadevall, T. 49ct Dome of Mount St. Helens. Skamania County, Washington. July 1, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198007/mcas0050 ID. Mount St. Helens Casadevall, T. 50ct Aerial view of wall of amphitheater and dome of Mount St. Helens. Skamania County, Washington. July 1, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198007/mcas0051 ID. Mount St. Helens Casadevall, T. 51ct Fumaroles and geologists on pyroclastic flow of May 18 eruption of Mount St. Helens. Skamania County, Washington. July 1, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198007/mcas0052 ID. Mount St. Helens Casadevall, T. 52ct Geologist and fumaroles on pyroclastic flow of May 18 eruption of Mount St. Helens. Skamania County, Washington. July 1, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198007/mcas0053 ID. Mount St. Helens Casadevall, T. 53ct Dome of Mount St. Helens and nearby fumaroles. Skamania County, Washington. July 1, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198007/mcas0054 ID. Mount St. Helens Casadevall, T. 54ct Lake St. Helens, north of Mount St. Helens. Skamania County, Washington. July 16, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198007/mcas0055 ID. Mount St. Helens Casadevall, T. 55ct Vegetation, blast area, Clearwater Creek, east of Mount St. Helens. Photo shows new growth on scorched evergreen. Skamania County, Washington. July 16, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198007/mcas0056 ID. Mount St. Helens Casadevall, T. 56ct Aerial view of Mount St. Helens dome. Skamania County, Washington. July l6, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198007/mcas0057 ID. Mount St. Helens Casadevall, T. 57ct Edge of Mount St. Helens dome, showing fumaroles. Skamania County, Washington. July 16, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198007/mcas0058 ID. Mount St. Helens Casadevall, T. 58ct View of springs on North Fork Toutle River, north of Mount St. Helens, at about 3080 feet. Skamania County, Washington. July 16, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198007/mcas0059 ID. Mount St. Helens Casadevall, T. 59ct Remains of fumarole at 3080 feet, Mount St. Helens. Pick for scale. Skamania County, Washington. July 16, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198007/mcas0060 ID. Mount St. Helens Casadevall, T. 60ct Gas pipes, North Fork Toutle River, north of Mount St. Helens, at 3080 feet. Skamania County, Washington. July l6, 1980. #1:/Loma Prieta, California, Earthquake October 17, 1989/mce00001 ID. Meyer, C.E. 1ct Loma Prieta, California, Earthquake October 17, 1989. San Francisco. Cars crushed by a collapsed brick facade near 5th and Townsend. Five people were killed at this locality while leaving from work. Slide I-1, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/mce00002 ID. Meyer, C.E. 2ct Loma Prieta, California, Earthquake October 17, 1989. San Francisco. Crushed car near the intersection of 5th and Townsend, South of Market. Slide I-2, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/mce00003 ID. Meyer, C.E. 3ct Loma Prieta, California, Earthquake October 17, 1989. San Francisco. Collapsed and burned buildings at Beach and Divisadero in the Marina District. San Francisco. Slide I-3, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/mce00004 ID. Meyer, C.E. 4ct Loma Prieta, California, Earthquake October 17, 1989. San Francisco. Demolition of collapsed building and watering down of burned buildings at Beach and Divisadero in the Marina District. October 18, 1989. Slide I-4, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/mce00005 ID. Meyer, C.E. 5ct Loma Prieta, California, Earthquake October 17, 1989. San Francisco. Collapsed and burned buildings shown in photo mce00003 at Beach and Divisadero in the Marina District. Slide I-5, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/mce00006 ID. Meyer, C.E. 6ct Loma Prieta, California, Earthquake October 17, 1989. San Francisco. Entrance and garage level of a Beach Street apartment complex in the Marina District in jeopardy of collapsing. Slide I-7, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/mce00007 ID. Meyer, C.E. 7ct Loma Prieta, California, Earthquake October 17, 1989. San Francisco. Collapsed brickwork from a corner apartment building in the Marina District. Slide I-9, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/mce00008 ID. Meyer, C.E. 8ct Loma Prieta, California, Earthquake October 17, 1989. Roadbed collapse near the interface of the cantilever and truss sections of the San Francisco-Oakland Bay Bridge. View is northwest. Slide II-1, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/mce00009 ID. Meyer, C.E. 9ct Loma Prieta, California, Earthquake October 17, 1989. Collapsed section of the San Francisco-Oakland Bay Bridge. View is west. Slide II-2, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/mce00010 ID. Meyer, C.E. 10ct Loma Prieta, California, Earthquake October 17, 1989. Los Gatos. Personal messages posted on a van at an emergency center. Slide VIII-5, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/mce00011 ID. Meyer, C.E. 11ct Loma Prieta, California, Earthquake October 17, 1989. Los Gatos. Vehicle crushed by collapsing unreinforced brick masonry. Slide VIII-6, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/mce00012 ID. Meyer, C.E. 12ct Loma Prieta, California, Earthquake October 17, 1989. Highway 17 in the Santa Cruz Mountains. Landslide debris filling both eastbound lanes near Summit Road. Slide XII-1, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/mce00013 ID. Meyer, C.E. 13ct Loma Prieta, California, Earthquake October 17, 1989. Highway 17 in the Santa Cruz Mountains. Landslide debris filling both eastbound lanes near Summit Road; foreground material is damaged lane separators. Slide XII-2, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/mce00014 ID. Meyer, C.E. 14ct Loma Prieta, California, Earthquake October 17, 1989. Highway 17 in the Santa Cruz Mountains. Damaged lane separators. Slide XII-4, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/mce00015 ID. Meyer, C.E. 15ct Loma Prieta, California, Earthquake October 17, 1989. Santa Cruz Area. Bicycles crushed by the fallen unreinforced brick facade of the Pacific Garden Mall. Slide XIII-2, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/mce00016 ID. Meyer, C.E. 16ct Loma Prieta, California, Earthquake October 17, 1989. Santa Cruz Area. Collapsed unreinforced brick facade of the Pacific Garden Mall. Slide XIII-3, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/mce00017 ID. Meyer, C.E. 17ct Loma Prieta, California, Earthquake October 17, 1989. Santa Cruz Area. Rescue efforts at the Pacific Garden Mall. Slide XIII-4, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/mce00018 ID. Meyer, C.E. 18ct Loma Prieta, California, Earthquake October 17, 1989. Santa Cruz Area. Removal of debris while searching for victims at the Pacific Garden Mall. Slide XIII-5, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/mce00019 ID. Meyer, C.E. 19ct Loma Prieta, California, Earthquake October 17, 1989. Santa Cruz Area. Searching for victims at a collapsed department store in the Pacific Garden Mall. Slide XIII-6, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/mce00020 ID. Meyer, C.E. 20ct Loma Prieta, California, Earthquake October 17, 1989. Santa Cruz Area. Storefront damage at the Pacific Garden Mall. Slide XIII-7, U.S. Geological Survey Open-File Report 90-547. #1:/Coyier G.A. Collection-Mount St. Helens*msh1977/mcga0001 ID. MSH-Coyier, G.A. 1ct Scenic view of snow-covered Mount St. Helens. Skamania County, Washington. May 1977. #1:/Coyier G.A. Collection-Mount St. Helens*msh198004/mcga0002 ID. MSH-Coyier, G.A. 2ct Scenic view of snow-covered Mount St. Helens. Skamania County, Washington. April 10, 1980. #1:/Coyier G.A. Collection-Mount St. Helens*msh198004/mcga0003 ID. MSH-Coyier, G.A. 3ct Time lapse series looking southwest at the ash covered bulge of Mt. St. Helens. Photos show development of eruptive cloud. Skamania County, Washington. April 13, 1980. Photograph Coyier 10ct published on pages 784-785 in U.S. Geological Survey. Professional paper 1250. 1981. #1:/Coyier G.A. Collection-Mount St. Helens*msh198004/mcga0004 ID. MSH-Coyier, G.A. 4ct Time lapse series looking southwest at the ash covered bulge of Mt. St. Helens. Photos show development of eruptive cloud. Skamania County, Washington. April 13, 1980. Photograph Coyier 10ct published on pages 784-785 in U.S. Geological Survey. Professional paper 1250. 1981. #1:/Coyier G.A. Collection-Mount St. Helens*msh198004/mcga0005 ID. MSH-Coyier, G.A. 5ct Time lapse series looking southwest at the ash covered bulge of Mt. St. Helens. Photos show development of eruptive cloud. Skamania County, Washington. April 13, 1980. Photograph Coyier 10ct published on pages 784-785 in U.S. Geological Survey. Professional paper 1250. 1981. #1:/Coyier G.A. Collection-Mount St. Helens*msh198004/mcga0006 ID. MSH-Coyier, G.A. 6ct Time lapse series looking southwest at the ash covered bulge of Mt. St. Helens. Photos show development of eruptive cloud. Skamania County, Washington. April 13, 1980. Photograph Coyier 10ct published on pages 784-785 in U.S. Geological Survey. Professional paper 1250. 1981. #1:/Coyier G.A. Collection-Mount St. Helens*msh198004/mcga0007 ID. MSH-Coyier, G.A. 7ct Time lapse series looking southwest at the ash covered bulge of Mt. St. Helens. Photos show development of eruptive cloud. Skamania County, Washington. April 13, 1980. Photograph Coyier 10ct published on pages 784-785 in U.S. Geological Survey. Professional paper 1250. 1981. #1:/Coyier G.A. Collection-Mount St. Helens*msh198004/mcga0008 ID. MSH-Coyier, G.A. 8ct Time lapse series looking southwest at the ash covered bulge of Mt. St. Helens. Photos show development of eruptive cloud. Skamania County, Washington. April 13, 1980. Photograph Coyier 10ct published on pages 784-785 in U.S. Geological Survey. Professional paper 1250. 1981. #1:/Coyier G.A. Collection-Mount St. Helens*msh198004/mcga0009 ID. MSH-Coyier, G.A. 9ct Time lapse series looking southwest at the ash covered bulge of Mt. St. Helens. Photos show development of eruptive cloud. Skamania County, Washington. April 13, 1980. Photograph Coyier 10ct published on pages 784-785 in U.S. Geological Survey. Professional paper 1250. 1981. #1:/Coyier G.A. Collection-Mount St. Helens*msh198004/mcga0010 ID. MSH-Coyier, G.A. 10ct Time lapse series looking southwest at the ash covered bulge of Mt. St. Helens. Photos show development of eruptive cloud. Skamania County, Washington. April 13, 1980. Photograph Coyier 10ct published on pages 784-785 in U.S. Geological Survey. Professional paper 1250. 1981. #1:/Coyier G.A. Collection-Mount St. Helens*msh198004/mcga0011 ID. MSH-Coyier, G.A. 11ct Time lapse series looking southwest at the ash covered bulge of Mt. St. Helens. Photos show development of eruptive cloud. Skamania County, Washington. April 13, 1980. Photograph Coyier 10ct published on pages 784-785 in U.S. Geological Survey. Professional paper 1250. 1981. #1:/Coyier G.A. Collection-Mount St. Helens*msh198004/mcga0012 ID. MSH-Coyier, G.A. 12ct Time lapse series looking southwest at the ash covered bulge of Mt. St. Helens. Photos show development of eruptive cloud. Skamania County, Washington. April 13, 1980. Photograph Coyier 10ct published on pages 784-785 in U.S. Geological Survey. Professional paper 1250. 1981. #1:/Coyier G.A. Collection-Mount St. Helens*msh198004/mcga0013 ID. MSH-Coyier, G.A. 13ct Time lapse series looking southwest at the ash covered bulge of Mt. St. Helens. Photos show development of eruptive cloud. Skamania County, Washington. April 13, 1980. Photograph Coyier 10ct published on pages 784-785 in U.S. Geological Survey. Professional paper 1250. 1981. #1:/Coyier G.A. Collection-Mount St. Helens*msh198004/mcga0014 ID. MSH-Coyier, G.A. 14ct Time lapse series looking southwest at the ash covered bulge of Mt. St. Helens. Photos show development of eruptive cloud. Skamania County, Washington. April 13, 1980. Photograph Coyier 10ct published on pages 784-785 in U.S. Geological Survey. Professional paper 1250. 1981. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198005/mcpp0001 ID. Mount St. Helens - PP 1250 1cp Aerial view of eruption of Mount St. Helens from south. Photo by J. Rosenbaum. Skamania County, Washington. May 18, 1980. Portion p. xxviii-1, U.S. Geological Survey Professional Paper 1250. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mcpp0002 ID. Mount St. Helens - PP 1250 2cp Aerial view of Mount St. Helens from the southwest. Dark andesite flows of Kalama age include a lava-flow complex on the southeast flank of the volcano and single flows on the southwest flank. Dacite of the summit dome forms the slopes above the lava flows. Photo by R.P. Hoblitt. Skamania County, Washington. 1979. Figure 4, U.S. Geological Survey Professional Paper 1250. #1:/Hoblitt R.P. Collection-Mount St. Helens/mcpp0003 ID. Mount St. Helens - PP 1250 3cp Young tephra sequence 8 km southeast of the former Mount St. Helens summit. Pale dacite tephras (sets Y and P) are overlain by tephras of Castle Creek and younger periods that include dark andesite tephras of layers Bh and Bo, pale dacite pumice of lay Bi that is about 1,000 yr old, dark basalt tephras of layer Bu, and white dacite pumice of set W. Photo by R.P. Hoblitt. Skamania County, Washington.n.d. Figure 5, U.S. Geological Survey Professional Paper 1250. #1:/Moore J.G. Collection-Mount St. Helens*msh198004/mcpp0004 ID. Mount St. Helens - PP 1250 4cp Steam-blast eruption from summit crater of Mount St. Helens, aerial view looking southwest, showing a roiling, gray-brown, ash-laden cloud that envelops and almost completely hides an initial fingerlike ash column and an upper white cloud formed by atmospheric condensation of water vapor in the convectively rising top of the eruptive column. Photo by James G. Moore. Skamania County, Washington. April 6, 1980. Figure 9, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh198008/mcpp0007 ID. Mount St. Helens - PP 1250 7cp Pumiceous ash flow of August 7 eruption of Mount St. Helens, viewed from Coldwater Ridge, 8 km north of volcano. The fully developed ash flow was moving down lower north flank and across pumice plain at about 1629 PDT. Speeds in excess of 100 km/hr were measured from carefully timed 35-mm still photographs and from 16-mm motion pictures. Ash cloud rises above the basal pyroclastic flow Main Plinian column is the higher, more diffuse cloud in background. Skamania County, Washington. August 7, 1980. Figure 15 and Figure 293-C, U.S. Geological Survey Professional Paper 1250. #1:/Christiansen R.L. Collection-Mount St. Helens*msh198008/mcpp0008 ID. Mount St. Helens - PP 1250 8cp Mount St. Helens in repose, looking south from Harrys Ridge, 8 km north of volcano. Amphitheater left by removal of north flank, collapse of summit and eruptive enlargement of crater on May 18. A light fume cloud rises from vent crater within the amphitheater, which is partly plugged by dome emplaced after August 7 eruption. Photo by R.L. Christiansen. Skamania County, Washington. August 29, 1980. Figure 16, U.S. Geological Survey Professional Paper 1250. #1:/Mount Collection-U.S. Forest Service-Mount St. Helens*msh1980/mcpp0009 ID. Mount St. Helens - PP 1250 9cp Area of northeastern part of Mount St. Helens in vicinity of Sugar Bowl and Dogs Head. May 12 ice-avalanche deposits form brown tongue north and northeast from Sugar Bowl. Photo by U.S. Forest Service. Skamania County, Washington. 1980. Figure 39 and Figure 199, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh198005/mcpp0010 ID. Mount St. Helens - PP 1250 10cp Mount St. Helens from geodimeter station at Toutle Canyon. Geologist standing using instrument and another seated taking notes in foreground. Skamania County, Washington. May 2, 1980. Pages 88-89, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh198005/mcpp0011 ID. Mount St. Helens - PP 1250 11cp Theodolite station at Timberline Viewpoint, at 1700 PDT. The afternoon low sun angle enhances visibility of the bulge on the upper Forsyth Glacier area, Mount St. Helens. Named features, indicated by X, are sites of geodetic reflector targets. Dashed line indicates approximate limits of deformed area and of rock subsequently removed during the May 18 debris avalanche and lateral volcano blast. Geologists and instruments in foreground. Skamania County, Washington. May 1, 1980. Figure 83, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh198004/mcpp0012 ID. Mount St. Helens - PP 1250 12cp Establishing an unmanned target (Sugar Bowl East in the vicinity of Mount St. Helens). The steel post was driven into ash (or wedged in rock) and guyed for stability. The wooden cross board was painted fluorescent orange to enhance visibility as a theodolite target, and the attached cluster of plastic highway reflectors served as the geodimeter target. This target was destroyed by a rock and ice avalanche on May 12. Skamania County, Washington. April 23, 1980. Figure 86, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens/mcpp0013 ID. Mount St. Helens - PP 1250 13cp Delta tower moved more than 300 m downslope from rampart and partly buried by pyroclastic flow from Mount St. Helens on October 16 or 17. Neck on tower was sheared off. A prism has been attached to leg of damaged tower, and slope distance from Harrys Ridge is routinely measured to this station, named Wreckage. Geologist at left. Skamania County, Washington.n.d. Figure 95, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh198009/mcpp0014 ID. Mount St. Helens - PP 1250 14cp Radial fracture in the tephra blanket in the Mount St. Helens crater. The rock in and adjacent to the fracture is light-pink oxidized dacite; the yellow encrustations form an outer zone beyond the oxidized dacite. Temperature measured at a depth of 1 m in the fracture was 200 degrees C. South-southwest view of fracture toward center of crater. Ice axe at right is about 1 m long. Skamania County, Washington. September 16, 1980. Figure 133-A, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh198009/mcpp0015 ID. Mount St. Helens - PP 1250 15cp Radial fracture in the tephra blanket in the Mount St. Helens crater. The rock in and adjacent to the fracture is light-pink oxidized dacite; the yellow encrustations form an outer zone beyond the oxidized dacite. Temperature measured at a depth of 1 m in the fracture was 200 degrees C. Same fracture showing yellow encrustations outward from crack. Skamania County, Washington. September 16, 1980. Figure 133-B, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh198006/mcpp0016 ID. Mount St. Helens - PP 1250 16cp Fumarole deposit of sulfur and gypsum on the June 12, 1980, pyroclastic flow From Mount St. Helens (now covered by later pyroclastic flows) Temperature of the fumarole on July 1, 1980, was 97 degrees C. Ice axe at right for scale. Skamania County, Washington. June 12, 1980. Figure 137, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh198005/mcpp0017 ID. Mount St. Helens - PP 1250 17cp Sample MSH 5-29-80-14 of dacite cobble from fumarole with temperature of 1410 when sample was collected on Mount St. Helens debris avalanche. Dark- red iron hydroxide was deposited first at high temperature. Yellow encrustations, consisting mostly of calcium sulfate in various hydration stages, were deposited in the cooler zone away from the orifice. Scale at top is in centimeters. Skamania County, Washington. May 29, 1980. Portion of Figure 138, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh198007/mcpp0018 ID. Mount St. Helens - PP 1250 18cp Orange-yellow encrustations deposited from fumarole 6 in the Mount St. Helens debris flow. Appearance on July 1, 1980 was conspicuously zoned; temperature was 94 degrees C. Yellow area was about 3 m across. Skamania County, Washington. July 1, 1980. Portion of Figure 141-A, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh198009/mcpp0019 ID. Mount St. Helens - PP 1250 19cp Orange-yellow encrustations deposited from fumarole 6 in the Mount St. Helens debris flow. By September 16 the yellow coloration had nearly disappeared, the temperature had cooled to 69 degrees C, and the white encrustations had crystallized to gypsum. Geologist at work at right. Skamania County, Washington. September 16, 1980. Portion of Figure 141-B, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh198004/mcpp0020 ID. Mount St. Helens - PP 1250 20cp Thermal-infrared image of Mount St. Helens summit area, April 11 at 0527. In this false-color image, black is coolest (-19 degrees C), light gray is 1 degree C, blue is 3.5 degrees C, and red is 41 degrees C or greater. The warmest are at bottom of crater; eastern vents were active on this day. A 15-minute eruption from vent 1 (Vl) and perhaps vent 2 (V2) had ended at about 0500 and another eruption began 16 minutes after this image was obtained. Vents inactive during this eruption shown by V Image obtained by U.S. Environmental Protection Agency. Skamania County, Washington. April 11, 1980. Portion of Figure 154, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh198008/mcpp0023 ID. Mount St. Helens - PP 1250 23cp Vertical thermal images of Mount St. Helens. RS-14A scanner; 8-14f region; 4,572 m flight altitude.U.S. Geological Survey calibrated color-coded images processed by computer; 3 mrad (milliradian) spatial resolution. Vertical stripe on side of image indicates color-coded temperature of upper blackbody of RS-14A scanner. Color-coded image showing thermal details of photo 24cp, based on finer color coding of hotter regions. Skamania County, Washington. August 13, 1980, 0530 PDT. Figure 173-A, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh198008/mcpp0024 ID. Mount St. Helens - PP 1250 24cp Vertical thermal images of Mount St. Helens. RS-14A scanner; 8-14 region; 4,572 m flight altitude.U.S. Geological Survey calibrated color-coded images processed by computer; 3 mrad (milliradian) spatial resolution. Vertical stripe on side of image indicates color-coded temperature of upper blackbody of RS-14A scanner. Shows crater, dome, amphitheater, and pyroclastic-flow deposits. Skamania County, Washington. August 13, 1980, 0530 PDT. Figure 173-B, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh198008/mcpp0025 ID. Mount St. Helens - PP 1250 25cp Vertical thermal images of Mount St. Helens. RS-14A scanner; 8-14 region; 4,572 m flight altitude.U.S. Geological Survey calibrated color-coded images processed by computer; 3 mrad (milliradian) spatial resolution. Vertical stripe on side of image indicates color-coded temperature of upperblackbody of RS-14A scanner. Shows crater, amphitheater, and pyroclastic-flow deposits. Skamania County, Washington. August 13, 1980, 1941-1943 PDT. Figure 173-C, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh198008/mcpp0026 ID. Mount St. Helens - PP 1250 26cp Vertical thermal images of Mount St. Helens. RS-14A scanner; 8-14Pj region; 4,572 m flight altitude.U.S. Geological Survey calibrated color-coded images processed by computer; 3 mrad (milliradian) spatial resolution. Vertical stripe on side of image indicates color-coded temperature of upper blackbody of RS-14A scanner. Shows crater, amphitheater, and pyroclastic-flow deposits. Skamania County, Washington. August 13, 1980, 1948-1951 PDT. Figure 173-D, U.S. Geological Survey Professional Paper 1250. #1:/U.S. Forest Service Collection-Mount St. Helens*msh198006/mcpp0027 ID. Mount St. Helens - PP 1250 27cp Stereo photographs showing seared zone along the valley of Green River, 20 km north of Mount St. Helens. Note sharp contrast between areas of healthy foliage (green) and seared zone (brown). To the south, note the pattern of downed timber. Photo by U.S. Forest Service. Skamania County, Washington. June 19, 1980. Figure 186, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh198010/mcpp0028 ID. Mount St. Helens - PP 1250 28cp Video-camera installation on ridge 9 km north of Mount St. Helens. Camera is mounted on top of shelter that contains microwave telemetry equipment. Volcano partially visible in background. Geologists at left. Skamania County, Washington. October 20, 1980. Figure 192, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh1980/mcpp0029 ID. Mount St. Helens - PP 1250 29cp Video-monitor and control console in the Emergency Coordination Center in Vancouver for monitoring Mount St. Helens. Clark County, Washington. 1980. Figure 194, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh1980/mcpp0030 ID. Mount St. Helens - PP 1250 30cp Debris-avalanche deposits in the upper valley of the North Fork Toutle River, north of Mount St. Helens. Cowlitz County, Washington. 1980. Pages 342-343, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh1980/mcpp0034 ID. Mount St. Helens - PP 1250 34cp Mount St. Helens blast-deposit section showing four units: a, basal; b, surge; c, pyroclastic flow; and d, accretionary lapilli. Section located north of Elk Rock about half way to Hoffstadt Creek. Shovel for scale. Cowlitz County, Washington. 1980. Figure 227, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh1980/mcpp0035 ID. Mount St. Helens - PP 1250 35cp Valley-fill deposit in upper Smith Creek canyon, formed by a blast pyroclastic flow from Mount St. Helens. Note abundant delimbed and debarked logs and wood fragments concentrated near the surface of the deposit. Skamania County, Washington. 1980. Figure 238, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh1980/mcpp0036 ID. Mount St. Helens - PP 1250 36cp Stratigraphic section atop distal downed tree, 15-25 km from Mount St. Helens. Layers A2 and A3 overlie bark. Rule for scale. Skamania County, Washington. 1980. Figure 267, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh1980/mcpp0037 ID. Mount St. Helens - PP 1250 37cp Scorched needles beneath layer A3 plastered on tree, about 20 km from Mount St. Helens. Needles beneath layer A3 are just as scorched as those not covered. Skamania County, Washington. 1980. Figure 268, U.S. Geological Survey Professional Paper 1250. #1:/Washington Department of Natural Resources Collection-Mount St. Helens*msh1978/mcpp0038 ID. Mount St. Helens - PP 1250 38cp Pre-eruption photographs in vicinity of Mount St. Helens, scale 124,000, showing valley of North Fork Toutle River near Camp Baker (near center of photograph). Flow from right to left. Photo by Washington Department of Natural Resources. Cowlitz County, Washington. June 5, 1978. Portion of Figure 276-A, U.S. Geological Survey Professional Paper 1250. #1:/Washington Department of Natural Resources Collection-Mount St. Helens*msh198006/mcpp0039 ID. Mount St. Helens - PP 1250 39cp Post eruption photographs in vicinity of Mount St. Helens, scale 124,000, showing valley of North Fork Toutle River near Camp Baker (near center of photograph). Flow from right to left. Width of mudflow inundation in center of photograph is 1.0 km. Note changes in position of Hoffstadt Creek, which joins the North Fork Toutle River at Camp Baker in this photo. Photo by Washington Department of Natural Resources. Cowlitz County, Washington. June 19, 1980. Portion of Figure 276-B, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh1980/mcpp0040 ID. Mount St. Helens - PP 1250 40cp Northern flank of Mount St. Helens, showing the rampart (R), amphitheater (A), stairsteps (S), and southern part of the pumice plain (P). View from Coldwater Ridge. Geologist at left in foreground. Skamania County, Washington. 1980. Figure 287, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh198008/mcpp0041 ID. Mount St. Helens - PP 1250 41cp Aerial view of tongues of pyroclastic-flow deposits of July 22 eruption of Mount St. Helens. View of southeast side of pumice plain looking south-southeast. Pyroclastic flows moved from right to left; distance from upper right to lower left is about 1.5 km. Skamania County, Washington. August 5, 1980. Figure 292, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh198008/mcpp0042 ID. Mount St. Helens - PP 1250 42cp Development of pyroclastic flow during 1623 PDT (Pacific Daylight time) eruption on August 7, viewed from Coldwater Ridge about 8 km north of Mount St. Helens. Initiation of main eruption at about 1626 PDT. Lower level easterly winds have pushed light-gray fume cloud to west side of amphitheater, and dark-gray ash-rich eruptive fountains, only a few meters high, are visible within crater. Two geologists at work in foreground. Skamania County, Washington. August 7, 1980. Figure 293-A, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh198008/mcpp0043 ID. Mount St. Helens - PP 1250 43cp Development of pyroclastic flow during 1623 PDT (Pacific Daylight time) eruption on August 7, viewed from Coldwater Ridge, about 8 km north of Mount St. Helens. Development of pyroclastic flow at about 1627 PDT as dense ash-rich eruptive material spills out to north from amphitheater before vertical Plinian column is well developed. Two geologists at work in foreground. Skamania County, Washington. August 7, 1980. Figure 293-B, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh198008/mcpp0044 ID. Mount St. Helens - PP 1250 44cp Development of pyroclastic flow during 1623 PDT (Pacific Daylight time) eruption on August 7, viewed from Coldwater Ridge, about 8 km north of Mount St. Helens. After motion of pyroclastic flow has ceased, at about 1631 PDT, associated ash cloud billows toward viewpoint, and impending fallout from it and the Plinian column necessitated departure of observers. Two geologists preparing for departure in foreground. Skamania County, Washington. August 7, 1980. Figure 293-D, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh198010/mcpp0045 ID. Mount St. Helens - PP 1250 45cp Aerial view of distal end of pyroclastic flow deposits (light gray) of the night of October 17, 1980, just north of base of stairsteps, Mount St. Helens. Well-developed tongues and lobes beyond (north of) these deposits were emplaced on August 7, as were most of the deposits in the foreground. View looking south-southwest. Skamania County, Washington. October 18, 1980. Figure 294, U.S. Geological Survey Professional Paper 1250. #1:/Friedman J.D. Collection-Mount St. Helens*msh198006/mcpp0046 ID. Mount St. Helens - PP 1250 46cp Aerial view of Mount St. Helens dacite dome from near ground level. Fracture in surface of dome is visible at upper right. Dome height is 65 m and east-west diameter is about 325 m, part of which is obscured by circumferential fumarole emanations. Photo by J.D. Friedman. Skamania County, Washington. June 29, 1980. Figure 309, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh1980/mcpp0047 ID. Mount St. Helens - PP 1250 47cp Taken near Spirit Lake, north of Mount St. Helens, showing layers of unit C and desconformable contact with layer A3. Pisolites, some of which are circled, can be seen in layers A3 and C1. Ruler at left and brush laying on surface for scale. Skamania County, Washington. 1980. Figure 360, U.S. Geological Survey Professional Paper 1250. #1:/Sikonia W.G. Collection-Mount St. Helens*msh1975/mcpp0048 ID. Mount St. Helens - PP 1250 48cp Aerial view of northwest slope of Mount St. Helens. Hydrothermal alteration in the summit and Goat Rocks domes is indicated by a faint pink to purple discoloration near the dome margin. Arrows note the historically active hydrothermal areas at The Boot (A) and the southwest slope (B). These two areas occur near the contact of the summit dome and underlying lavas and pyroclastic material. Photo by W.G. Sikonia. Skamania County, Washington. September 30, 1975. Portion of Figure 380, U.S. Geological Survey Professional Paper 1250. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh198006/mcpp0049 ID. Mount St. Helens - PP 1250 49cp Aerial view looking west, showing massive tree blowdown surrounding Obscurity Lake, northeast of Mount Margaret, after the eruptions of Mount St. Helens. Photo by R.P. Hoblitt. Skamania County, Washington. July 6, 1980. Pages 688-689, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh198004/mcpp0050 ID. Mount St. Helens - PP 1250 50cp Looking southwest at the ash-covered bulge and northeast flank of Mount St. Helens with large eruptive plume partially obscuring mountain. Skamania County, Washington. April 13, 1980, 2:45 PM. Pages 784-785, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh198007/mcpp0051 ID. Mount St. Helens - PP 1250 51cp View to east of Mount St. Helens debris avalanche from distal margin, in valley of North Fork Toutle River. Cowlitz County, Washington. July 15, 1980. Figure 461, U.S. Geological Survey Professional Paper 1250. #1:/May D. Collection-Mount St. Helens*msh198006/mct00001 ID. Mount St. Helens May, D. 1ct Mount St. Helens dome. Aerial photo taken from U.S. Forest Service observer aircraft. Skamania County, Washington. June 28, 1980. #1:/May D. Collection-Mount St. Helens*msh198006/mct00002 ID. Mount St. Helens May, D. 2ct Mount St. Helens dome. Aerial photo taken from U.S. Forest Service observer aircraft. Skamania County, Washington. June 28, 1980. #1:/May D. Collection-Mount St. Helens*msh198006/mct00005 ID. Mount St. Helens May, D. 5ct Looking south at Mount St. Helens. Aerial photo taken from U.S. Forest Service observer aircraft. Skamania County, Washington. June 28, 1980. #1:/May D. Collection-Mount St. Helens*msh/mct00006 ID. Mount St. Helens May, D. 6ct Pumice flow near Mount St. Helens. Aerial photo taken from U.S. Forest Service observer aircraft. Skamania County, Washington. #1:/Cummans J. Collection-Mount St. Helens*msh198005/mcum0001 ID. Mount St. Helens - Cummans, J. 1 Aerial view of east end of Swift Reservoir. The mud and debris originated in the upper reaches of Smith Creek, Muddy River, and Pine Creek. Small streaks reflected off window glass on negative. Skamania County, Washington. May 20, 1980. Portion is figure 2 in U.S. Geological Survey. Circular 850-B. 1981. #1:/Cummans J. Collection-Mount St. Helens*msh198005/mcum0002 ID. Mount St. Helens - Cummans, J. 2 Aerial view of valley mudflow deposits in the upper reaches of the South Fork Toutle River. Mount St. Helens in background with summit obscured by clouds. Cowlitz and Skamania Counties, Washington. May 23, 1980. Figure 3 in U.S. Geological Survey. Circular 850-B. 1981. #1:/Cummans J. Collection-Mount St. Helens*msh198005/mcum0003 ID. Mount St. Helens - Cummans, J. 3 Aerial view looking east across the thickest part of the debris avalanche deposit in the North Fork Toutle River. This location is about 1 mile downstream from Spirit Lake. Skamania County, Washington. May 23, 1980. Figure 4 in U.S. Geological Survey. Circular 850-B. 1981. #1:/Cummans J. Collection-Mount St. Helens*msh198005/mcum0004 ID. Mount St. Helens - Cummans, J. 4 Surface of debris avalanche deposit in the North Fork Toutle River downstream from Elk Rock. The lighter areas are the exposed surface of the debris deposit; the darker areas are brown sediment deposited by the subsequent mudflows. Cowlitz County, Washington. May 19, 1980. Figure 5 in U.S. Geological Survey. Circular 850-B. 1981. #1:/Cummans J. Collection-Mount St. Helens*msh198005/mcum0005 ID. Mount St. Helens - Cummans, J. 5 Debris avalanche deposit along right bank of the North Fork Toutle River downstream from Elk Rock. Note edge of the blast area near center of photo where trees were blown down. Cowlitz County, Washington. May 19, 1980. Figure 6 in U.S. Geological Survey. Circular 850-B. 1981. #1:/Cummans J. Collection-Mount St. Helens*msh198005/mcum0006 ID. Mount St. Helens - Cummans, J. 6 Characteristic mudflow marks along the Toutle River just downstream from Highway 504 bridge. The material when dry, has a coarse abrasive texture. Photo shows mudflow marks on trees. Cowlitz County, Washington. May 19, 1980. Figure 7 in U.S. Geological Survey. Circular 850-B. 1981. #1:/Cummans J. Collection-Mount St. Helens*msh198005/mcum0007 ID. Mount St. Helens - Cummans, J. 7 Scoured channel and mudflow marks on trees downstream from the site of the Toutle River gage. Cowlitz County, Washington. May 19, 1980. Figure 8 in U.S. Geological Survey. Circular 850-B. 1981. #1:/Cummans J. Collection-Mount St. Helens*msh198005/mcum0008 ID. Mount St. Helens - Cummans, J. 8 Aerial view of flooded area at destroyed Highway 504 bridge just below the confluence of the North and South Forks Toutle River. Cowlitz County, Washington. May 19, 1980. Portion is figure 9 in U.S. Geological Survey. Circular 850-B. 1981. #1:/Cummans J. Collection-Mount St. Helens*msh198005/mcum0009 ID. Mount St. Helens - Cummans, J. 9 Aerial view of mudflow near Highway 99 bridge on the Toutle River. The flow had a consistency of wet mortar. Photograph taken at 8:45 p.m. Cowlitz County, Washington. May 18, 1980. Figure 10 in U.S. Geological Survey. Circular 850-B. 1981. #1:/Grand Canyon National Park/mdg00023 ID. Metzger, D.G. 23 Grand Canyon National Park, Arizona. South rim of the Grand Canyon. Indian Garden on the lower left and the village of Grand Canyon on the upper right. Bright Angel Shale, Muav Limestone, Redwall Limestone, Supai Formation, Hermit Shale, Coconino Sandstone, Toroweap Formation, Kaibab Limestone. Photo by T. Nichols. Plate 12, U.S. Geological Survey Water-Supply Paper 1475-C. #1:/Diehl S. Collection-Mount St. Helens*msh198008/mdie0007 ID. Mount St. Helens Diehl, S. 7ct "Vegetable" hummock on North Toutle River debris flow, about 7 miles east of Camp Baker. Man for scale. Cowlitz County, Washington. August 2, 1980. #1:/Diehl S. Collection-Mount St. Helens*msh198008/mdie0011 ID. Mount St. Helens Diehl, S. 11ct Sentinel hummock, Man for scale. Cowlitz County, Washington. August 3, 1980, #1:/Diehl S. Collection-Mount St. Helens*msh198008/mdie0013 ID. Mount St. Helens Diehl, S. 13ct Stream flowing from under debris, North Toutle River about 7 miles east of Camp Baker smectite precipitates. Cowlitz County, Washington. August 3, 1980. #1:/Diehl S. Collection-Mount St. Helens*msh198007/mdie0019 ID. Mount St. Helens Diehl, S. 19ct Aerial view of north face of Mount St. Helens from 6:00 A.M. observer flight. Skamania County, Washington. July 23, 1980. #1:/Diehl S. Collection-Mount St. Helens*msh198007/mdie0024 ID. Mount St. Helens Diehl, S. 24ct Mount St. Helens, July 22, 1980 eruption from Vancouver. Clark County, Washington. #1:/Diehl S. Collection-Mount St. Helens*msh198008/mdie0034 ID. Mount St. Helens Diehl, S. 34ct Debris hummock on North Toutle River debris flow, composed of ancestral Mount St. Helens rock. Strand line of a mudflow. Cowlitz County, Washington. August 3, 1980. #1:/Diehl S. Collection-Mount St. Helens*msh198008/mdie0035 ID. Mount St. Helens Diehl, S. 35ct Geologist digging a trench to find base of vegetable flow, on top of mudflow. Four miles east of Camp Baker, along North Toutle River. Cowlitz County, Washington. August 3, 1980. #1:/Diehl S. Collection-Mount St. Helens*msh198008/mdie0037 ID. Mount St. Helens Diehl, S. 37ct Smectite precipitate, North Toutle River debris flow. Cowlitz County, Washington. August 1980. #1:/Alaska/mdj00031 ID. Miller, D.J. 31ct Alaska. Cape Kekurnai on Puale Bay on the east coast of the Alaska Peninsula. August 30, 1948. #1:/Alaska/mdj00039 ID. Miller, D.J. 39ct Alaska. Yakataga Reef on the east side of the Gulf of Alaska. May 11, 1948. #1:/Alaska Glaciers/mdj00640 ID. Miller, D.J. 640 Alaska Glaciers. Front of Guyot Glacier, which is northwest of Yakutat in the Chugach Mountains. September 25, 1947. Photos mdj00640, mdj00641, and mdj00642 form a panorama. #1:/Alaska Glaciers/mdj00643 ID. Miller, D.J. 643 Alaska Glaciers. Front of Guyot Glacier, which is northwest of Yakutat in the Chugach Mountains, viewed from the west side of Icy Bay. September 25, 1947. Photos mdj00643, mdj00644, mdj00645, and mdj00646 form a panorama. #1:/Alaska Glaciers/mdj00651 ID. Miller, D.J. 651 Alaska Glaciers. Front of Guyot Glacier, which is northwest of Yakutat in the Chugach Mountains, viewed from Icy Bay. September 25, 1947. #1:/Alaska Glaciers/mdj00666 ID. Miller, D.J. 666 Alaska Glaciers. Head of West Big River Glacier in the Alaska Gulf region. October 6, 1947. Photos mdj00666, mdj00667, and mdj00668 form a panorama. #1:/Alaska Glaciers/mdj00673 ID. Miller, D.J. 673 Alaska Glaciers. From the foot of Munday Creek Glacier, which is west- northwest of Yakutat in the St. Elias Mountains. October 7, 1947. #1:/Glacier Bay National Park and Preserve/mdj01007 ID. Miller, D.J. 1007 Glacier Bay National Park and Preserve, Alaska. Lituya Glacier at Gilbert Inlet. June 10, 1952. #1:/Glacier Bay National Park and Preserve/mdj01008 ID. Miller, D.J. 1008 Glacier Bay National Park and Preserve, Alaska. North Crillon Glacier on Crillon Inlet. June 10, 1952. #1:/Miller D.J. Collection-Southeast Alaska Earthquake, July 10, 1958/mdj01029 ID. Miller, D.J. 1029 Crillon Inlet and head of Lituya Bay in 1952; trimline begins above tidal from of North Crillon Glacier; altitude 490 feet at trimline. Front of Cascade Glacier at left margin. Lituya district, Alaska Gulf region, Alaska. Plate 9-A in U.S. Geological Survey. Professional paper 354-C. 1960. #1:/Alaska Glaciers/mdj01111 ID. Miller, D.J. 1111 Alaska Glaciers. Tidal front of Guyot Glacier, viewed from the west shore of Icy Bay. Guyot Glacier is northwest of Yakutat in the Chugach Mountains. June 29, 1953. Photos mdj01111, mdj01112, and mdj01113 form a panorama. #1:/Alaska Glaciers/mdj01112 ID. Miller, D.J. 1112 Alaska Glaciers. Tidal front of Guyot Glacier, viewed from the west shore of Icy Bay. Guyot Glacier is northwest of Yakutat in the Chugach Mountains. June 29, 1953. Photos mdj01111, mdj01112, and mdj01113 form a panorama. #1:/Alaska Glaciers/mdj01113 ID. Miller, D.J. 1113 Alaska Glaciers. Tidal front of Guyot Glacier, viewed from the west shore of Icy Bay. Guyot Glacier is northwest of Yakutat in the Chugach Mountains. June 29, 1953. Photos mdj01111, mdj01112, and mdj01113 form a panorama. #1:/Alaska Glaciers/mdj01115 ID. Miller, D.J. 1115 Alaska Glaciers. Front of Guyot Glacier, which is northwest of Yakutat in the Chugach Mountains, looking toward Mount St. Elias. June 30, 1953. #1:/Alaska Glaciers/mdj01116 ID. Miller, D.J. 1116 Alaska Glaciers. Front of Guyot Glacier, which is northwest of Yakutat in the Chugach Mountains, probably 90 degrees to that shown in photo mdj01115. July 24, 1953. #1:/Miller D.J. Collection-Southeast Alaska Earthquake, July 10, 1958/mdj01118 ID. Miller, D.J. 1118 North shore of Lituya Bay between Cenotaph Island and Gilbert Inlet, showing forests in different ages in zone denuded by 1936 giant waves in upper part of zone denuded by giant wave about 1874, in part of zone denuded by giant wave in 1853 or 1854, in upper part of recently glaciated zone and above lateral moraine. 1953. Lituya district, Alaska Gulf region, Alaska. Plate 8-A in U.S. Geological Survey. Professional paper 354-C. 1960. #1:/Alaska Glaciers/mdj01139 ID. Miller, D.J. 1139 Alaska Glaciers. Tidal front of Guyot Glacier, which is northwest of Yakutat in the Chugach Mountains, probably looking to Mount St. Elias. September 13, 1954. #1:/Alaska Glaciers/mdj01140 ID. Miller, D.J. 1140 Alaska Glaciers. Tidal front of Guyot Glacier, which is northwest of Yakutat in the Chugach Mountains. Mount St. Elias on the skyline. September 13, 1954. #1:/Miller D.J. Collection-Southeast Alaska Earthquake, July 10, 1958/mdj01159 ID. Miller, D.J. 1159 Aerial view of Lituya Bay, 1954, trimlines of the 1936 giant waves and the 1853-54 giant wave. Lateral moraines and the end moraine in the right and left foreground record a recent advance of ice to the mouth of the bay. Mount Crillon altitude 12,726 feet is the highest peak on the skyline. Lituya district, Alaska Gulf region, Alaska. September 16, 1954. Plate 3-A in U.S. Geological Survey. Professional paper 354-C. 1960. #1:/Miller D.J. Collection-Southeast Alaska Earthquake, July 10, 1958/mdj01161 ID. Miller, D.J. 1161 Section cut in 1953 from spruce tree growing just above trimline of 1936 giant waves. There are 17 growth rings outside injury at on right. Lituya district, Alaska Gulf region, Alaska. Plate 8-B in U.S. Geological Survey. Professional paper 354-C. 1960. #1:/Miller D.J. Collection-Southeast Alaska Earthquake, July 10, 1958/mdj01162 ID. Miller, D.J. 1162 Section cut in 1953 from spruce tree growing just above trimline of 1853-54 giant wave. There are 100 growth rings outside injury on right. Lituya district, Alaska Gulf region, Alaska. Plate 10 in U.S. Geological Survey. Professional paper 354-C. 1960. #1:/Miller D.J. Collection-Southeast Alaska Earthquake, July 10, 1958/mdj01163 ID. Miller, D.J. 1163 Destruction of forest by 1936 giant waves, destruction to an altitude of about 90 feet at head of Lituya Bay, half a mile northwest of Cascade Glacier. Photograph by Tom Smith. Lituya district, Alaska Gulf region, Alaska. Plate 9-B in U.S. Geological Survey. Professional paper 354-C. 1960. #1:/Glacier Bay National Park and Preserve/mdj01170 ID. Miller, D.J. 1170 Glacier Bay National Park and Preserve, Alaska. Front of Lituya Glacier at the head of Lituya Bay. August 7, 1958. #1:/Miller D.J. Collection-Southeast Alaska Earthquake, July 10, 1958/mdj01171 ID. Miller, D.J. 1171 Northeast wall of Gilbert Inlet, August 1958, shows scar of rockslide. Head of slide about 3,000 feet altitude, just below snowfield in upper center. Front of Lituya Glacier at lower left corner. Lituya district, Alaska Gulf region, Alaska. July 10, 1958. Plate 4-A in U.S. Geological Survey. Professional paper 354-C. 1960. #1:/Glacier Bay National Park and Preserve/mdj01172 ID. Miller, D.J. 1172 Glacier Bay National Park and Preserve, Alaska. Trimline of 1958 giant wave on the fronts of Cascade Glacier and North Crillon Glacier at the head of Lituya Bay. August 7, 1958. #1:/Miller D.J. Collection-Southeast Alaska Earthquake, July 10, 1958/mdj01186 ID. Miller, D.J. 1186 Stump of living spruce tree broken off by the giant wave at Harbor Point, mouth of Lituya Bay. Brim of hat is 12 inches in diameter. Lituya district, Alaska Gulf region, Alaska. Plate 5-B in U.S. Geological Survey. Professional paper 354-C. 1960. #1:/Miller D.J. Collection-Southeast Alaska Earthquake, July 10, 1958/mdj01190 ID. Miller, D.J. 1190 West from Coal Creek, on south shore of Lituya Bay, August 1958. Trimline at left margin is at an altitude of about 180 and is 1000 feet in from high tide shoreline. Lituya district, Alaska Gulf region, Alaska. Plate 5-A in U.S. Geological Survey. Professional paper 354-C. 1960. #1:/Miller D.J. Collection-Southeast Alaska Earthquake, July 10, 1958/mdj01203 ID. Miller, D.J. 1203 West on Cenotaph Island. Shows channel cut through forest by the 1958 giant wave. Note injured tree standing at portal of channel, on right. Lituya district, Alaska Gulf region, Alaska. Plate 6-A in U.S. Geological Survey. Professional paper 354-C. 1960. #1:/Southeast Alaska Earthquake, July 10, 1958/mdj01232 ID. Miller, D.J. 1232 Southeast Alaska Earthquake, July 10, 1958. Scar at the head of Lituya Bay and wave damage on the north shore, from southwest of Gilbert Inlet to La Chaussee spit. August 9, 1958. Photos mdj01232, mdj01233, and mdj01234 form a panorama. #1:/Miller D.J. Collection-Southeast Alaska Earthquake, July 10, 1958/mdj01233 ID. Miller, D.J. 1233 Spur southwest of Gilbert Inlet, August 1958. West side of spur; note washed appearance of bedrock at lower right, in contrast to slide areas just below trimlines. Lituya district, Alaska Gulf region, Alaska. July 10, 1958. Plate 7-B in U.S. Geological Survey. Professional paper 354-C. 1960. #1:/Southeast Alaska Earthquake, July 10, 1958/mdj01234 ID. Miller, D.J. 1234 Southeast Alaska Earthquake, July 10, 1958. Scar at the head of Lituya Bay and wave damage on the north shore, from southwest of Gilbert Inlet to La Chaussee spit. August 9, 1958. Photos mdj01232, mdj01233, and mdj01234 form a panorama. #1:/Miller D.J. Collection-Southeast Alaska Earthquake, July 10, 1958/mdj01242 ID. Miller, D.J. 1242 North shore of Lituya Bay, August 1958, 2 miles from entrance, August 1958; forest as dense as that in the upper part of view formerly extended nearly to the shoreline. Width of zone of destruction by the 1958 giant wave is about 1,700 feet at right margin of photograph. Note trees with limbs and bark removed in foreground. Lituya district, Alaska Gulf region, Alaska. Plate 6-B in U.S. Geological Survey. Professional paper 354-C. 1960. #1:/Southeast Alaska Earthquake, July 10, 1958/mdj01247 ID. Miller, D.J. 1247 Southeast Alaska Earthquake, July 10, 1958. Wave damage on the south shore of Lituya Bay, from Harbor Point to the spur southwest of Crillon Inlet. August 9, 1958. Photos mdj01247 through mdj01261 form a sequence of fifteen photographs. #1:/Southeast Alaska Earthquake, July 10, 1958/mdj01248 ID. Miller, D.J. 1248 Southeast Alaska Earthquake, July 10, 1958. Wave damage on the south shore of Lituya Bay, from Harbor Point to the spur southwest of Crillon Inlet. August 9, 1958. Photos mdj01247 through mdj01261 form a sequence of fifteen photographs. #1:/Southeast Alaska Earthquake, July 10, 1958/mdj01249 ID. Miller, D.J. 1249 Southeast Alaska Earthquake, July 10, 1958. Wave damage on the south shore of Lituya Bay, from Harbor Point to the spur southwest of Crillon Inlet. August 9, 1958. Photos mdj01247 through mdj01261 form a sequence of fifteen photographs. #1:/Southeast Alaska Earthquake, July 10, 1958/mdj01250 ID. Miller, D.J. 1250 Southeast Alaska Earthquake, July 10, 1958. Wave damage on the south shore of Lituya Bay, from Harbor Point to the spur southwest of Crillon Inlet. August 9, 1958. Photos mdj01247 through mdj01261 form a sequence of fifteen photographs. #1:/Southeast Alaska Earthquake, July 10, 1958/mdj01251 ID. Miller, D.J. 1251 Southeast Alaska Earthquake, July 10, 1958. Wave damage on the south shore of Lituya Bay, from Harbor Point to the spur southwest of Crillon Inlet. August 9, 1958. Photos mdj01247 through mdj01261 form a sequence of fifteen photographs. #1:/Southeast Alaska Earthquake, July 10, 1958/mdj01252 ID. Miller, D.J. 1252 Southeast Alaska Earthquake, July 10, 1958. Wave damage on the south shore of Lituya Bay, from Harbor Point to the spur southwest of Crillon Inlet. August 9, 1958. Photos mdj01247 through mdj01261 form a sequence of fifteen photographs. #1:/Southeast Alaska Earthquake, July 10, 1958/mdj01253 ID. Miller, D.J. 1253 Southeast Alaska Earthquake, July 10, 1958. Wave damage on the south shore of Lituya Bay, from Harbor Point to the spur southwest of Crillon Inlet. August 9, 1958. Photos mdj01247 through mdj01261 form a sequence of fifteen photographs. #1:/Southeast Alaska Earthquake, July 10, 1958/mdj01254 ID. Miller, D.J. 1254 Southeast Alaska Earthquake, July 10, 1958. Wave damage on the south shore of Lituya Bay, from Harbor Point to the spur southwest of Crillon Inlet. August 9, 1958. Photos mdj01247 through mdj01261 form a sequence of fifteen photographs. #1:/Southeast Alaska Earthquake, July 10, 1958/mdj01255 ID. Miller, D.J. 1255 Southeast Alaska Earthquake, July 10, 1958. Wave damage on the south shore of Lituya Bay, from Harbor Point to the spur southwest of Crillon Inlet. August 9, 1958. Photos mdj01247 through mdj01261 form a sequence of fifteen photographs. #1:/Southeast Alaska Earthquake, July 10, 1958/mdj01256 ID. Miller, D.J. 1256 Southeast Alaska Earthquake, July 10, 1958. Wave damage on the south shore of Lituya Bay, from Harbor Point to the spur southwest of Crillon Inlet. August 9, 1958. Photos mdj01247 through mdj01261 form a sequence of fifteen photographs. #1:/Southeast Alaska Earthquake, July 10, 1958/mdj01257 ID. Miller, D.J. 1257 Southeast Alaska Earthquake, July 10, 1958. Wave damage on the south shore of Lituya Bay, from Harbor Point to the spur southwest of Crillon Inlet. August 9, 1958. Photos mdj01247 through mdj01261 form a sequence of fifteen photographs. #1:/Southeast Alaska Earthquake, July 10, 1958/mdj01258 ID. Miller, D.J. 1258 Southeast Alaska Earthquake, July 10, 1958. Wave damage on the south shore of Lituya Bay, from Harbor Point to the spur southwest of Crillon Inlet. August 9, 1958. Photos mdj01247 through mdj01261 form a sequence of fifteen photographs. #1:/Southeast Alaska Earthquake, July 10, 1958/mdj01259 ID. Miller, D.J. 1259 Southeast Alaska Earthquake, July 10, 1958. Wave damage on the south shore of Lituya Bay, from Harbor Point to the spur southwest of Crillon Inlet. August 9, 1958. Photos mdj01247 through mdj01261 form a sequence of fifteen photographs. #1:/Southeast Alaska Earthquake, July 10, 1958/mdj01260 ID. Miller, D.J. 1260 Southeast Alaska Earthquake, July 10, 1958. Wave damage on the south shore of Lituya Bay, from Harbor Point to the spur southwest of Crillon Inlet. August 9, 1958. Photos mdj01247 through mdj01261 form a sequence of fifteen photographs. #1:/Southeast Alaska Earthquake, July 10, 1958/mdj01261 ID. Miller, D.J. 1261 Southeast Alaska Earthquake, July 10, 1958. Wave damage on the south shore of Lituya Bay, from Harbor Point to the spur southwest of Crillon Inlet. August 9, 1958. Photos mdj01247 through mdj01261 form a sequence of fifteen photographs. #1:/Alaska Glaciers/mdj01265 ID. Miller, D.J. 1265 Alaska Glaciers. Taylor Bay and Brady Glacier. August 29, 1958. #1:/Glacier Bay National Park and Preserve/mdj01269 ID. Miller, D.J. 1269 Glacier Bay National Park and Preserve, Alaska. Front of La Perouse Glacier. August 29, 1958. #1:/Southeast Alaska Earthquake, July 10, 1958/mdj01275 ID. Miller, D.J. 1275 Southeast Alaska Earthquake, July 10, 1958. Along the coast from Icy Point to Lituya Bay: marine terraces, La Perouse Glacier, Crillon Lake, Mount Fairweather. August 29, 1958. #1:/Southeast Alaska Earthquake, July 10, 1958/mdj01276 ID. Miller, D.J. 1276 Southeast Alaska Earthquake, July 10, 1958. Lituya Bay, viewed from the south. August 29, 1958. #1:/Miller D.J. Collection-Southeast Alaska Earthquake, July 10, 1958/mdj01278 ID. Miller, D.J. 1278 Lituya Bay in August 1958, a giant wave generated on July 9, 1958, by a rockslide from the cliff at the head of the bay destroyed the forest over the light areas to a maximum altitude of 1,720 feet and a maximum distance of 3,600 feet in the high tide shoreline at Fish Lake. A fishing boat anchored in the cove at lower left was carried over the spit in the foreground; a boat under way near the entrance was sunk and a third boat, anchored near the lower right rode out the wave. Lituya district, Alaska Gulf region, Alaska. July 10, 1958. Plate 3-B in U.S. Geological Survey. Professional paper 354-C. 1960. #1:/Glacier Bay National Park and Preserve/mdj01286 ID. Miller, D.J. 1286 Glacier Bay National Park and Preserve, Alaska. Looking almost directly down on Lituya Glacier at Gilbert Inlet. August 29, 1958. #1:/Southeast Alaska Earthquake, July 10, 1958/mdj01287 ID. Miller, D.J. 1287 Southeast Alaska Earthquake, July 10, 1958. Wave damage on the spur at Gilbert Inlet on Lituya Bay. View is northwest. August 29, 1958. #1:/Miller D.J. Collection-Southeast Alaska Earthquake, July 10, 1958/mdj01289 ID. Miller, D.J. 1289 Northwest at head of Lituya Bay, August 1958, large rockslide plunged into Gilbert Inlet at lower right corner, shearing off part of the front of Lituya Glacier and causing water to surge over the spur opposite. The trimlines slopes down to right, across scars of slides that occurred before the 1958 earthquake. Lituya district, Alaska Gulf region, Alaska. Plate 4-B in U.S. Geological Survey. Professional paper 354-C. 1960. #1:/Southeast Alaska Earthquake, July 10, 1958/mdj01290 ID. Miller, D.J. 1290 Southeast Alaska Earthquake, July 10, 1958. Northwest along Fairweather fault trench at the head of Lituya Bay. August 29, 1958. #1:/Southeast Alaska Earthquake, July 10, 1958/mdj01295 ID. Miller, D.J. 1295 Southeast Alaska Earthquake, July 10, 1958. Wave damage on Lituya Bay, viewed from the south. August 29, 1958. Photos mdj01295, mdj01296, and mdj01297 form a panorama. #1:/Southeast Alaska Earthquake, July 10, 1958/mdj01296 ID. Miller, D.J. 1296 Southeast Alaska Earthquake, July 10, 1958. Wave damage on Lituya Bay, viewed from the south. August 29, 1958. Photos mdj01295, mdj01296, and mdj01297 form a panorama. #1:/Southeast Alaska Earthquake, July 10, 1958/mdj01297 ID. Miller, D.J. 1297 Southeast Alaska Earthquake, July 10, 1958. Wave damage on Lituya Bay, viewed from the south. August 29, 1958. Photos mdj01295, mdj01296, and mdj01297 form a panorama. #1:/Alaska Glaciers/mdj01335 ID. Miller, D.J. 1335 Alaska Glaciers. Northwest of the tidal front of Hubbard Glacier, which is north-northeast of Yakutat in the St. Elias Mountains. Osier Island on left. August 22, 1958. #1:/Alaska Glaciers/mdj01350 ID. Miller, D.J. 1350 Alaska Glaciers. Jumper Island, a nunatak encircled by moraine deposited by Recent high stand of Bagley Ice Field (on the right) and Jefferies Glacier in the eastern Chugach Mountains. August 20, 1958. #1:/Alaska Glaciers/mdj01397 ID. Miller, D.J. 1397 Alaska Glaciers. First Glacier (Popof Glacier) on the north side of Martin River Valley and southeast of Mount Basargin. 1947. #1:/Alaska Glaciers/mdj01463 ID. Miller, D.J. 1463 Alaska Glaciers. Front of Guyot Glacier in Icy Bay northwest of Yakutat in the Chugach Mountains. 1947. #1:/Alaska Glaciers/mdj01472 ID. Miller, D.J. 1472 Alaska Glaciers. Tyndall Glacier and Samovar Hills. 1947. #1:/Dion N.P. Collection-Mount St. Helens*msh198007/mdnp0001 ID. Mount St. Helens - Dion, N.P. 1 Aerial view of Mount St. Helens, Spirit Lake and St. Helens Lake after the eruption of May 18. Skamania County, Washington. July 7, 1980. Frontispiece in U.S. Geological Survey. Circular 850-G. 1981. #1:/Dion N.P. Collection-Mount St. Helens*msh198007/mdnp0002 ID. Mount St. Helens - Dion, N.P. 2 Aerial view of Spirit Lake before the eruption. Top of Mount St. Helens in foreground. View is to the northeast. Skamania County, Washington.n.d. Figure 3 in U.S. Geological Survey. Circular 850-G. 1981. #1:/Dion N.P. Collection-Mount St. Helens*msh198007/mdnp0003 ID. Mount St. Helens - Dion, N.P. 3 Aerial view of Spirit Lake after the eruption of May 18. View is to the northeast. Skamania County, Washington. July 24, 1980. Figure 4 in U.S. Geological Survey. Circular 850-G. 1981. #1:/Dion N.P. Collection-Mount St. Helens*msh198007/mdnp0005 ID. Mount St. Helens - Dion, N.P. 5 Near view of St. Helens Lake after the eruption of May 18. View is to the south. Skamania County, Washington.n.d Published as Figure 6 in U.S. Geological Survey. Circular 850-G. 1981. #1:/Dion N.P. Collection-Mount St. Helens*msh1980/mdnp0006 ID. Mount St. Helens - Dion, N.P. 6 Aerial view of Fawn Lake before the eruption of May 18. View to the southeast includes Mount St. Helens in the background. Cowlitz and Skamania Counties, Washington. May 17, 1980. Portion is figure 7 in U.S. Geological Survey. Circular 850-G. 1981. #1:/Dion N.P. Collection-Mount St. Helens*msh198006/mdnp0007 ID. Mount St. Helens - Dion, N.P. 7 Nearer aerial view of Fawn Lake after the eruption of May 18. View to the southeast includes Mount St. Helens in the background. Cowlitz and Skamania Counties, Washington. June 4, 1980. Portion is figure 8 in U.S. Geological Survey. Circular 850-G. 1981. #1:/Washington Game Department-Dion N.P. Collection-Mount St. Helens*msh1980/mdnp0008 ID. Mount St. Helens - Dion, N.P. 8 Vertical aerial view of Venus Lake before the eruption. Photo courtesy Washington Game Department. Skamania County, Washington.n.d. Portion is figure 9 in U.S. Geological Survey. Circular 850-G. 1981. #1:/Dion N.P. Collection-Mount St. Helens*msh1980/mdnp0009 ID. Mount St. Helens - Dion, N.P. 9 Vertical aerial view of Venus Lake after the eruption of May 18. Skamania County, Washington.n.d. Portion is figure 10 in U.S. Geological Survey. Circular 850-G. 1981. #1:/Mount Rainier National Park/mdr00001 ID. Mullineaux, D.R. 1ct Mount Rainier National Park, Washington. Tephra layers in an alpine meadow (McNeeley site), seven-tenths of a kilometer (four-tenths of a mile) north- northwest of the Ranger Station at Yakima Park. The middle unit layer forms a thin gray bed that is both underlain and overlain by thicker yellowish-brown ash of the lower and upper units. "Mazama ash" is iron-stained to a yellow or brown in most places in the park. Figure 7, U.S. Geological Survey Bulletin 1326. #1:/Mount Rainier National Park/mdr00002 ID. Mullineaux, D.R. 2ct Mount Rainier National Park, Washington. Mount Rainier, viewed from the south. September 1964. #1:/Mount Rainier National Park/mdr00004 ID. Mullineaux, D.R. 4ct Mount Rainier National Park, Washington. Fromm the southeast of Cowlitz Glacier and Mount Rainier. September 1964. #1:/Mount Rainier National Park/mdr00013 ID. Mullineaux, D.R. 13 Mount Rainier National Park, Washington. Upper part of Mount Rainier, viewed from the northeast. 1964. #1:/Mount Rainier National Park/mdr00014 ID. Mullineaux, D.R. 14 Mount Rainier National Park, Washington. Upper part of Mount Rainier, north- northeast over Winthrop Glacier. 1964. #1:/Mount Rainier National Park/mdr00016 ID. Mullineaux, D.R. 16 Mount Rainier National Park, Washington. Mount Rainier, viewed from the south across Nisqually Valley. 1964. #1:/Hawaii Volcanoes National Park/mdr00018 ID. Mullineaux, D.R. 18 Hawaii Volcanoes National Park. Fissure and cones along the northeast rift zone of Mauna Loa Volcano. Puu Ulaula in the upper right corner is a cinder cone about 0.4 mile across. The general slope of the ground surface is toward the left. Photo by U.S. Army Air Corps. Figure 4, U.S. Geological Survey Open-File Report 74-239. #1:/Hawaii Volcanoes National Park/mdr00019 ID. Mullineaux, D.R. 19 Hawaii Volcanoes National Park. Lava flows on the southeast flank of Kilauea Volcano. Flows branch and rejoin, leaving areas surrounded but not covered (kipukas). #1:/Hawaii Volcanoes National Park/mdr00021 ID. Mullineaux, D.R. 21 Hawaii Volcanoes National Park. Steep slopes (palis) formed by slump-block subsidence on the southeast flank of Kilauea Volcano. Figure 11, U.S. Geological Survey Open-File Report 74-239. #1:/Marshall Islands/med00007 ID. McKee, E.D. 7ct Marshall Islands. Northeast section of Jaluit Reef. #1:/Marshall Islands/med00008 ID. McKee, E.D. 8ct Marshall Islands. North section of Jaluit Reef. #1:/Marshall Islands/med00011 ID. McKee, E.D. 11ct Marshall Islands. Part of the east side of Jaluit Reef. #1:/Africa/med00013 ID. McKee, E.D. 13ct Africa. Part of star dunes, showing three curving arms with steep slipfaces oriented in various directions, at Tsondab Vlei in the northeastern part of the Namib Desert, Namibia (South West Africa). Photo by E.T. Nichols. #1:/Grand Canyon National Park/med00014 ID. McKee, E.D. 14 Grand Canyon National Park, Arizona. Cross-bedding (fluviatile) in Supai Sandstone (middle) on Yaki Trail. #1:/Grand Canyon National Park/med00015 ID. McKee, E.D. 15 Grand Canyon National Park, Arizona. Cross-bedding (marine) at the top of Cambrian age Tapeats Sandstone on Toroweap Point. #1:/Grand Canyon National Park/med00020 ID. McKee, E.D. 20 Grand Canyon National Park, Arizona. Section in the north wall of the Grand Canyon illustrating the unconformity between (A) lower Precambrian schists and (B) steeply dipping upper Precambrian beds and the unconformity between (B) upper Precambrian and (C) Paleozoic strata. Figure 3, U.S. Geological Survey Professional Paper 669-B. Similar to photo med00072. #1:/Jordan/med00021 ID. McKee, E.D. 21ct Jordan. Convolute structure in evaporite salt deposits near the Dead Sea. #1:/Grand Canyon National Park/med00023 ID. McKee, E.D. 23 Grand Canyon National Park, Arizona. Primary structures in stratified rocks of the Grand Canyon. Interference ripple marks in fine-grained sandstone of Bright Angel Shale in Pipe Creek Canyon. Figure 22-B, U.S. Geological Survey Professional Paper 669-B. #1:/Grand Canyon National Park/med00026 ID. McKee, E.D. 26 Grand Canyon National Park, Arizona. Major unconformities involving (1) Vishnu Schist (includes granite), (2) Grand Canyon Series, (3) Tonto Group, Cambrian. Unconformity between lower Precambrian rocks and Paleozoic strata west of Quartermaster Canyon. Figure 19-B, U.S. Geological Survey Professional Paper 669-B. #1:/Grand Canyon National Park/med00028 ID. McKee, E.D. 28 Grand Canyon National Park, Arizona. Wedgeplanar cross-strata in the middle part of Callville Limestone on Grand Gulch Mine Trail. Primary structures in stratified rocks of the Grand Canyon. Figure 22-A, U.S. Geological Survey Professional Paper 669-B. #1:/Grand Canyon National Park/med00030 ID. McKee, E.D. 30 Grand Canyon National Park, Arizona. Primary structures in stratified rocks of the Grand Canyon. Large-scale, tabular-planar cross-strata in middle cliff of the Supai Formation in Havasu Canyoh. Figure 22-D, U.S. Geological Survey Professional Paper 669-B. #1:/Grand Canyon National Park/med00031 ID. McKee, E.D. 31 Grand Canyon National Park, Arizona. Grand Canyon, looking east from To-Ro- Weap. Modern photograph of a sketch by Thomas Moran. Frontispiece, U.S. Geological Survey Professional Paper 669-A. #1:/Grand Canyon National Park/med00032 ID. McKee, E.D. 32 Grand Canyon National Park, Arizona. Panorama from Point Sublime. View is about southeast along the axis of the Kaibab upwarp. In the distant skyline, right, is San Francisco Mountain and other volcanoes in the volcanic field south of the Grand Canyon. The plateau surface is Permian limestone (Kaibab Limestone). The canyon walls seen in this view are mostly the Permian, Pennsylvanian, and Mississippian Formation. Altitude of the rim here is about 8,200 feet. Bottom of the canyon (out of sight) is below 3,000 feet. San Francisco Mountain, about 70 miles away, is above 12,600 feet. Modern photograph of a sketch by W.H. Holmes. Plate 28, U.S. Geological Survey Monograph 2; Plate 31, U.S. Geological Survey Annual Report 2 (1880-81); Frontispiece, U.S. Geological Survey Professional Paper 669-C. #1:/Grand Canyon National Park/med00035 ID. McKee, E.D. 35ct Grand Canyon National Park, Arizona. Specimen of Supai Conglomerate - mudballs in siltstone from the Wescogami Formation. #1:/Grand Canyon National Park/med00036 ID. McKee, E.D. 36ct Grand Canyon National Park, Arizona. Quartz grains in limestone, with large- scale tabular planar cross-beds, in the upper part of Middle Cliff Member, Supai Group (Wescogame Formation) on Thunder River Trail. 1967. #1:/Grand Canyon National Park/med00037 ID. McKee, E.D. 37ct Grand Canyon National Park, Arizona. Minor sedimentary structures in the Wescogame Formation: shrinkage cracks in a talus block from the cliff unit on Apache Trail in Havasu Canyon. Figure N2-C, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00038 ID. McKee, E.D. 38ct Grand Canyon National Park, Arizona. Contact between sets of tabular planar cross-beds, calcareous sandstone, Wescogame Formation, in Fishtail Canyon near Thunder River Trail. 1967. Figure K14-D, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00040 ID. McKee, E.D. 40ct Grand Canyon National Park, Arizona. Massive sandstone beds of cliff unit of the Wescogame Formation on Thunder River Trail are mostly various shades of grayish orange-pink. Channels near the base are filled with conglomerate. Manakacha Formation below. 1967. Figure MS2-B, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00041 ID. McKee, E.D. 41ct Grand Canyon National Park, Arizona. Conglomerate, Middle Cliff Unit (Wescogame Formation), Supai Group on Thunder River Trail. 1967. #1:/White Sands National Monument/med00042 ID. McKee, E.D. 42 White Sands National Monument, New Mexico. Compound barchan dune in a downwind area of the White Sands dune field, showing dunes and interdune spaces of approximately equal extent. Photo courtesy of U.S. National Park Service, 1973. Figure 3, page 62, Journal of Research of the U.S. Geological Survey, v.3, no.1. #1:/White Sands National Monument/med00043 ID. McKee, E.D. 43 White Sands National Monument, New Mexico. Transverse dunes in an upwind area of the White Sands dune field, showing dunes that occupy several times more space than do the interdunes of that area. Photo courtesy of Holloman Air Force Base, 1973. Figure 4, page 62, Journal of Research of the U.S. Geological Survey, v.3, no.1. #1:/Grand Canyon National Park/med00044 ID. McKee, E.D. 44ct Grand Canyon National Park, Arizona. Channels on erosion surfaces within the Manakacha Formation. Wavy surface of erosion at the base of Manakacha cliff unit near Twentyseven Mile Rapids in Marble Canyon. Figure H3-B, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00046 ID. McKee, E.D. 46ct Grand Canyon National Park, Arizona. National Canyon, viewed from the east rim, showing Supai through Kaibab Formations. 1966. #1:/White Sands National Monument/med00047 ID. McKee, E.D. 47 White Sands National Monument, New Mexico. Sedimentary structures and morphology of interdune areas. Drilling in interdune area at locality 1; lee side of complex dunes in the shadow on the left. Figure 6-D, page 64, Journal of Research of the U.S. Geological Survey, v.3, no.1. #1:/Grand Canyon National Park/med00048 ID. McKee, E.D. 48ct Grand Canyon National Park, Arizona. From Havasupai hilltop of Havasu Canyon. #1:/White Sands National Monument/med00049 ID. McKee, E.D. 49 White Sands National Monument, New Mexico. Sedimentary structures and morphology of interdune areas. Vegetation and trapped sand on the surface of interdune area near locality 1. Figure 6-F, page 64, Journal of Research of the U.S. Geological Survey, v.3, no.1. #1:/Grand Canyon National Park/med00051 ID. McKee, E.D. 51ct Grand Canyon National Park, Arizona. Channel of Esplanade Conglomerate (Esplanade Sandstone) on Apache Trail in Havasu Canyon. 1973. #1:/Grand Canyon National Park/med00055 ID. McKee, E.D. 55ct Grand Canyon National Park, Arizona. Structures in Esplanade Member (Esplanade Sandstone) of Supai Group - natural casts, along Topocoba Trail. Photo by L.M. Hinchliffe. 1963. #1:/Grand Canyon National Park/med00057 ID. McKee, E.D. 57ct Grand Canyon National Park, Arizona. Tuckup Canyon waterfalls from rain in the Esplanade Sandstone of Cottonwood Canyon. 1971. #1:/Grand Canyon National Park/med00062 ID. McKee, E.D. 62ct Grand Canyon National Park, Arizona. Types of cross-strata in the Esplanade Sandstone in Fishtail Canyon near Thunder River Trail: tabular and wedge- planar cross-strata, medium-scale. Figure L5-C, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00066 ID. McKee, E.D. 66ct Grand Canyon National Park, Arizona. Ripple marks in Middle Cliff Member (Wescogame Formation), Supai Sandstone, along Apache Trail in Havasu Canyon. 1973. #1:/Grand Canyon National Park/med00069 ID. McKee, E.D. 69ct Grand Canyon National Park, Arizona. Unconformable surface between the Manakacha Formation and the Wescogame Formation. Channel 60 feet deep at the base of the cliff unit of the Wescogame, west of Navajo Falls in Havasu Canyon. 1972. Figure H9-B, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00072 ID. McKee, E.D. 72ct Grand Canyon National Park, Arizona. Drawing of a section in the north wall of the Grand Canyon illustrating the unconformity between (A) lower Precambrian schists and (B) steeply dipping upper Precambrian beds and the unconformity between (B) upper Precambrian and (C) Paleozoic strata. Similar to photo med00020. #1:/Grand Canyon National Park/med00073 ID. McKee, E.D. 73ct Grand Canyon National Park, Arizona. Stratigraphic section of the Grand Canyon west of the Little Colorado River by J.S. Newberry, who was with the Ives expedition and was the first geologist to see the Grand Canyon. He described the fossils of the Kaibab at Diamond Creek. #1:/Grand Canyon National Park/med00074 ID. McKee, E.D. 74ct Grand Canyon National Park, Arizona. Memorial to John Wesley Powell. #1:/Grand Canyon National Park/med00075 ID. McKee, E.D. 75ct Grand Canyon National Park, Arizona. Temple west of Marble Canyon at mile 49. #1:/Grand Canyon National Park/med00076 ID. McKee, E.D. 76ct Grand Canyon National Park, Arizona. Redwall Limestone in Parashant Canyon, one of the narrowest canyons in the Grand Canyon. Parashant Canyon cuts down 500 feet through the Redwall Limestone. 1971. #1:/Grand Canyon National Park/med00077 ID. McKee, E.D. 77ct Grand Canyon National Park, Arizona. West at Quartermaster Canyon. #1:/Grand Canyon National Park/med00078 ID. McKee, E.D. 78ct Grand Canyon National Park, Arizona. Algonkian strata under Tapeats Sandstone below Lipan Point. 1970. #1:/Grand Canyon National Park/med00079 ID. McKee, E.D. 79ct Grand Canyon National Park, Arizona. Colorado River floodplain with shrinkage cracks near Columbine Falls. 1963. #1:/Grand Canyon National Park/med00081 ID. McKee, E.D. 81ct Grand Canyon National Park, Arizona. Natural bridge of recent conglomerate in Tuckup Canyon. 1971. #1:/Grand Canyon National Park/med00083 ID. McKee, E.D. 83ct Grand Canyon National Park, Arizona. Thunder Springs. #1:/Great Sand Dunes National Monument And Preserve/med00086 ID. McKee, E.D. 86 Great Sand Dunes National Monument and Preserve, Colorado. Reversing dunes near Alamosa. Higher dunes are as much as 700 feet (210 meters). Photo by J.S. Shelton, circa 1975. Figure 62-A, U.S. Geological Survey Professional Paper 1052. #1:/Great Sand Dunes National Monument And Preserve/med00087 ID. McKee, E.D. 87 Great Sand Dunes National Monument and Preserve, Colorado. Reversing dunes near Alamosa. Higher dunes are as much as 700 feet (210 meters). Photo by J.S. Shelton, circa 1975. Figure 62-B, U.S. Geological Survey Professional Paper 1052. #1:/Grand Canyon National Park/med00089 ID. McKee, E.D. 89ct Grand Canyon National Park, Arizona. Helicopter at Carbon Creek. Nankoweap Formation under Tapeats Sandstone. 1970. #1:/White Sands National Monument/med00091 ID. McKee, E.D. 91 White Sands National Monument, New Mexico. Beveled remnant of barchan dunes in interdune area. Three truncated sets of cross-strata are visible. Circa 1975. Figure 70, U.S. Geological Survey Professional Paper 1052. #1:/White Sands National Monument/med00092 ID. McKee, E.D. 92 White Sands National Monument, New Mexico. Beveled remnant of transverse dune in interdune area. Circa 1975. Figure 71, U.S. Geological Survey Professional Paper 1052. #1:/Grand Canyon National Park/med00096 ID. McKee, E.D. 96ct Grand Canyon National Park, Arizona. Tuckup Canyon waterfalls below Esplanade Sandstone during rain. 1971. #1:/Grand Canyon National Park/med00097 ID. McKee, E.D. 97ct Grand Canyon National Park, Arizona. Waterfalls during rainstorm, viewed from the Colorado River near Tuckup Canyon. 1972. #1:/Scotts Bluff National Monument/med00106 ID. McKee, E.D. 106ct Scotts Bluff National Monument, Nebraska. Covered wagon in the foreground. 1975. #1:/Scotts Bluff National Monument/med00107 ID. McKee, E.D. 107ct Scotts Bluff National Monument, Nebraska. 1975. #1:/Scotts Bluff National Monument/med00108 ID. McKee, E.D. 108ct Scotts Bluff National Monument, Nebraska. 1975. #1:/Scotts Bluff National Monument/med00109 ID. McKee, E.D. 109ct Scotts Bluff National Monument, Nebraska. Oregon Trail wagon trail cut in mud in the 1850's at Mitchell Pass. 1975. #1:/Scotts Bluff National Monument/med00110 ID. McKee, E.D. 110ct Scotts Bluff National Monument, Nebraska. 1975. #1:/White Sands National Monument/med00111 ID. McKee, E.D. 111ct White Sands National Monument, New Mexico. Slippage on a dune. Photo by J.R. Douglass, U.S. National Park Service, 1964. #1:/White Sands National Monument/med00113 ID. McKee, E.D. 113ct White Sands National Monument, New Mexico. Crest of barchan dune. Photo by J.R. Douglass, U.S. National Park Service, 1964. #1:/Grand Canyon National Park/med00114 ID. McKee, E.D. 114 Grand Canyon National Park, Arizona. Permian Coconino Sandstone, forming a cliff on the west side of Hermit Basin. Large-scale tabular-planar cross- strata are prominantly displayed. Circa 1975. Figure 140, U.S. Geological Survey Professional Paper 1052. #1:/Grand Canyon National Park/med00115 ID. McKee, E.D. 115 Grand Canyon National Park, Arizona. Permian Coconino Sandstone on Dripping Springs Trail, showing sets of high-angle cross-strata and tangential bases of foresets. Circa 1975. Figure 141, U.S. Geological Survey Professional Paper 1052. #1:/Grand Canyon National Park/med00116 ID. McKee, E.D. 116 Grand Canyon National Park, Arizona. Wedge-planar cross-strata, a common structure of the Permian Coconino Sandstone, on Kaibab Trail. Circa 1975. Figure 142, U.S. Geological Survey Professional Paper 1052. #1:/White Sands National Monument/med00117 ID. McKee, E.D. 117ct White Sands National Monument, New Mexico. Avalanching traction flow on dune. Photo by J.R. Douglass, 1966. #1:/Grand Canyon National Park/med00118 ID. McKee, E.D. 118 Grand Canyon National Park, Arizona. Slump marks on slipface of cross-strata, Coconino Sandstone on Grandview Trail. Circa 1975. Portion of Figure 144, U.S. Geological Survey Professional Paper 1052. #1:/Canyon de Chelly National Monument/med00119 ID. McKee, E.D. 119ct Canyon de Chelly National Monument, Arizona. Channels in the upper De Chelly Sandstone filled with Shinarump Conglomerate on the south rim of Canyon de Chelly. 1964. #1:/Canyon de Chelly National Monument/med00120 ID. McKee, E.D. 120ct Canyon de Chelly National Monument, Arizona. Large-scale wedges in upper De Chelly Sandstone, seen in Canyon de Chelly along White House Trail. 1964. #1:/Grand Canyon National Park/med00121 ID. McKee, E.D. 121 Grand Canyon National Park, Arizona. Footprints of vertebrate animal, probably reptile, preserved on dip slope (about 30 degrees) of cross-bedded Coconino Sandstone. The tracks, about one-fourth natural size, point uphill. Photo courtesy of U.S. National Park Service. Circa 1975. Figure 147, U.S. Geological Survey Professional Paper 1052. #1:/Canyon de Chelly National Monument/med00122 ID. McKee, E.D. 122ct Canyon de Chelly National Monument, Arizona. White House cliff dwellings, viewed from the south rim of Canyon de Chelly. 1964. #1:/Canyon de Chelly National Monument/med00123 ID. McKee, E.D. 123ct Canyon de Chelly National Monument, Arizona. Cross-stratification and flat beds in the upper De Chelly Sandstone along White House Trail. 1964. #1:/Canyon de Chelly National Monument/med00124 ID. McKee, E.D. 124ct Canyon de Chelly National Monument, Arizona. Cross-stratification, including flat beds, along White House Trail. 1964. #1:/Canyon de Chelly National Monument/med00125 ID. McKee, E.D. 125ct Canyon de Chelly National Monument, Arizona. Spider Rock, viewed from the south rim of Canyon de Chelly. 1964. #1:/Canyon de Chelly National Monument/med00127 ID. McKee, E.D. 127 Canyon de Chelly National Monument, Arizona. Large-scale and medium-scale cross-strata of tabular-planar type in Permian De Chelly Sandstone. 1975. Figure 150, U.S. Geological Survey Professional Paper 1052. #1:/Canyon de Chelly National Monument/med00128 ID. McKee, E.D. 128 Canyon de Chelly National Monument, Arizona. Permian De Chelly Sandstone. Horizontally-bedded silty sandstone, interdune deposit between cross-strata sets of eolian dune type. Circa 1975. Figure 151, U.S. Geological Survey Professional Paper 1052. #1:/Canyon de Chelly National Monument/med00129 ID. McKee, E.D. 129ct Canyon de Chelly National Monument, Arizona. Vertebrate tracks and body groove in Shinarump Conglomerate at the mouth of Canyon de Chelly. 1964. #1:/Zion National Park/med00134 ID. McKee, E.D. 134 Zion National Park, Utah. Navajo Sandstone, showing large-scale wedge-planar cross-strata (middle) between tabular-planar cross-strata (above and below). Photo by E.T. Nichols, circa 1975. Figure 155, U.S. Geological Survey Professional Paper 1052. #1:/White Sands National Monument/med00141 ID. McKee, E.D. 141 White Sands National Monument, New Mexico. Simple crescentic dunes. Barchanoid ridges near lat 32 048' N., long 106 016'. Photo by Holloman Air Force Base, 1973. Portion of figure 173-B, U.S. Geological Survey Professional Paper 1052. #1:/Grand Canyon National Park/med00153 ID. McKee, E.D. 153 Grand Canyon National Park, Arizona. Watahomigi Formation and Manakacha Formation. Slope of Watahomigi, 196 feet thick, exposed in window formed by Holocene basalt flows at the foot of Toroweap Valley. Cliff of Redwall Limestone at the bottom. Strata identified, from top: Manakacha Formation, Watahomigi Formation, Redwall Limestone, Holocene basalt flows. Figure C5-A, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00154 ID. McKee, E.D. 154 Grand Canyon National Park, Arizona. Watahomigi Formation and Manakacha Formation in Havasu Canyon. Watahomigi slope between the cliffs of Manakacha, above, and Redwall, below. Portion of Figure C5-B, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00156 ID. McKee, E.D. 156 Grand Canyon National Park, Arizona. Wescogame Formation on Thunder River Trail. Large-scale tabular-planar cross-strata at top of cliff unit. Slope unit above and main cliff of Esplanade Sandstone beyond. Figure C7-A, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00157 ID. McKee, E.D. 157 Grand Canyon National Park, Arizona. Wescogame Formation on Kaibab Trail, south. Massive unit of large-scale cross-strata with thinner beds below forming the cliff unit of formation. Slope unit above. Esplanade Sandstone cliff in the upper left. Figure C7-B, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00159 ID. McKee, E.D. 159 Grand Canyon National Park, Arizona. Wescogame Formation near Apache Trail to Havasu Canyon. Planar cross-strata, large scale, in the upper part of the cliff unit. Figure C7-D, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00168 ID. McKee, E.D. 168 Grand Canyon National Park, Arizona. Esplanade Sandstone along the west trail to Thunder River. Figure C9-C, U. S Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00169 ID. McKee, E.D. 169 Grand Canyon National Park, Arizona. Esplanade Sandstone in Parashant Canyon. View is north. Figure C9-D, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00170 ID. McKee, E.D. 170 Grand Canyon National Park, Arizona. Esplanade Sandstone on the east side of Whitmore Wash. Basalt flow to the right. Figure C9-E, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00175 ID. McKee, E.D. 175 Grand Canyon National Park, Arizona. Buried valley deposits below the Watahomigi Formation near Quartermaster Canyon in western Grand Canyon. Valley width is 1,250 feet. Valley depth is 401 feet. Location of Manakacha Formation, Redwall Limestone, Temple Butte Limestone. Figure G-1, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00183 ID. McKee, E.D. 183 Grand Canyon National Park, Arizona. Section of Supai Group as exposed in various areas of western Grand Canyon. West side of promontory, east of Guano Cave locality. The Manakacha Formation is 210-260 feet thick in these photos. R - Redwall Limestone, Supai Group Wa - Watahomigi Formation M - Manakacha Formation We - Wescogame Formation P - Pakoon Limestone Figure C3-C, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00186 ID. McKee, E.D. 186 Grand Canyon National Park, Arizona. Cross-stratification in cliff unit of the Manakacha Formation. Wedge-planar cross-strata in calcarenous sandstone in Whitmore Wash. Figure K6-C, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00187 ID. McKee, E.D. 187 Grand Canyon National Park, Arizona. Cross-stratification in cliff unit of the Manakacha Formation. Jasper bands in tabular-planar cross-beds at Toroweap Point. Figure K6-D, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00193 ID. McKee, E.D. 193 Contact between sets in tabularplanar cross-strata, calcareous sandstone; Fishtail Canyon near Thunder River Trail. Scale in inches. Cross-strata in sandstone and in carbonate rocks of the Wescogame Formation, Grand Canyon region. Grand Canyon National Park. Coconino County, Arizona. n.d. Published as figure K14-D in U. S. Geological Survey. Professional paper 1173, 1982. #1:/Grand Canyon National Park/med00196 ID. McKee, E.D. 196 Grand Canyon National Park, Arizona. Size-scale of cross-strata in Esplanade Sandstone. Compound cross-strata consisting of dipping planar sets filling a shallow trough in Fishtail Canyon near Thunder River Trail. Figure K20-A, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00200 ID. McKee, E.D. 200 Grand Canyon National Park, Arizona. Size-scale of cross-strata in Esplanade Sandstone at Toroweap Point. Small-scale, tabular-planar set between sets of thin horizontal strata. Figure K20-E, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00201 ID. McKee, E.D. 201 Grand Canyon National Park, Arizona. Large-, medium-, and small-scale cross- strata in sandstone of the Wescogame Formation. Trough structure in large- scale cross-strata of Wescogame cliff unit in Marble Canyon. Figure L4-A, U.S. Geological Survey Professional Paper 1173. #1:/Brazil/med00203 ID. McKee, E.D. 203ct Brazil. High-angle, cross stratified Permian siltstone at Serra de Esperanca, Parana. 1970. #1:/White Sands National Monument/med00204 ID. McKee, E.D. 204ct White Sands National Monument, New Mexico. Latex peel of vertical cross section of dune, showing intertonguing cross-wind deposits and fade-outs from avalanching. 1959. #1:/Grand Canyon National Park/med00209 ID. McKee, E.D. 209 Grand Canyon National Park, Arizona. Types of cross-strata in the Esplanade Sandstone: tabular-planar cross-strata, medium-scale on Apache Trail in Havasu Canyon. Figure L5-D, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00210 ID. McKee, E.D. 210 Grand Canyon National Park, Arizona. Types of cross-strata in the Esplanade Sandstone: trough cross-strata above basal conglomerate on Topocoba Trail. Figure L5-E, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00211 ID. McKee, E.D. 211 Grand Canyon National Park, Arizona. Types of cross-strata in the Esplanade Sandstone: trough cross-strata, lower part of formation on Topocoba Trail. Figure L5-F, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00212 ID. McKee, E.D. 212 Grand Canyon National Park, Arizona. Minor sedimentary structures in the Watahomigi Formation. Ripple laminae in siltstone near the base of the formation at Navajo Falls in Havasu Canyon. Portion of Figure N1-A, U.S. Geological Survey Professional Paper 1173. #1:/McKee E.D. Collection/med00216 ID. McKee, E.D. 216ct Specimen showing casts of mud pellets in sandstone of Moenkopi Formation, Flagstaff, Coconino County, Arizona.n.d #1:/McKee E.D. Collection-Grand Canyon National Park/med00218 ID. McKee, E.D. 218 Shrinkage cracks in talus block from cliff unit, Apache Trail, Havasu Canyon. Hammer for scale. Minor sedimentary structures in Wescogame Formation. Grand Canyon. Grand Canyon National Park. Coconino County, Arizona.n.d. Published as figure N2-C in U.S. Geological Survey. Professional paper 1173. 1982. #1:/Grand Canyon National Park/med00219 ID. McKee, E.D. 219 Grand Canyon National Park, Arizona. Varieties of ripple marks and shrinkage cracks in the Wescogame Formation on Thunder River Trail. Parallel-straight ripple marks on inclined (20 degrees) bedding plane of foresets. Scale in inches. Figure N3-A, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00220 ID. McKee, E.D. 220 Grand Canyon National Park, Arizona. Varieties of ripple marks and shrinkage cracks in the Wescogame Formation on Apache Trail in Havasu Canyon. Linguoid or crescent-shaped ripple marks. Figure N3-B, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00221 ID. McKee, E.D. 221 Grand Canyon National Park, Arizona. Varieties of ripple marks and shrinkage cracks in the Wescogame Formation in Andrus Canyon. Lunate or crescent shaped ripple marks and drag marks. Figure N3-C, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00222 ID. McKee, E.D. 222 Grand Canyon National Park, Arizona. Varieties of ripple marks and shrinkage cracks in the Wescogame Formation on Apache Trail in Havasu Canyon. Parallel- sinuous ripple marks. Scale in inches. Figure N3-D, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00225 ID. McKee, E.D. 225 Grand Canyon National Park, Arizona. Minor sedimentary structures and contorted bedding in Esplanade Sandstone on Topocoba Trail. Pillow-shaped molds developed on bottom of bed near base of main cliff unit. Figure N4-A, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00226 ID. McKee, E.D. 226ct Grand Canyon National Park, Arizona. Test pit, showing ripple laminae in the Colorado River floodplain near Quartermaster Canyon. 1963. #1:/Grand Canyon National Park/med00227 ID. McKee, E.D. 227 Grand Canyon National Park, Arizona. Minor sedimentary structures and contorted bedding in Esplanade Sandstone at Totoweap Point. Contorted structure in cross-strata of calcareous sandstone, probably resulting from differential loading. Anticline in the center from escaping gas or water. Figure N4-C, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00228 ID. McKee, E.D. 228 Grand Canyon National Park, Arizona. Minor sedimentary structures and contorted bedding in Esplanade Sandstone on Kaibab Trail, north. Small-scale contortions in thin- to medium-bedded sandstone. Middle ledge with contorted bedding is 4 feet thick. Figure N4-D, U.S. Geological Survey Professional Paper 1173. #1:/Monument Valley Navajo Tribal Park/med00229 ID. McKee, E.D. 229ct Monument Valley Navajo Tribal Park, Arizona. One of the Mittens. 1972. #1:/Grand Canyon National Park/med00231 ID. McKee, E.D. 231 Grand Canyon National Park, Arizona. Contorted stratification in sandstones of the Supai Group on Thunder River Trail. Anticlines and synclines in the Wescogame Formation from pene-contemporaneous tight folding of sand body. Traces of structure etched on the surface by weathering. Figures N6-A and N2-B, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00232 ID. McKee, E.D. 232 Grand Canyon National Park, Arizona. Contorted stratification in sandstones of the Supai Group. Asymmetrical anticlines in massive bed of sandstone, Wescogame Formation, near Apache Trail to Supai Village. Scale in inches. Figure N6-B, U.S. Geological Survey Professional Paper 1173. #1:/Glen Canyon National RECREATION AREA/med00241 ID. McKee, E.D. 241ct Glen Canyon National Recreation Area, Utah. Labyrinth Canyon. #1:/Zion National Park/med00242 ID. McKee, E.D. 242ct Zion National Park, Utah. Zion Canyon, viewed from Rockville Road. 1962. #1:/Petrified Forest National Park/med00252 ID. McKee, E.D. 252ct Petrified Forest National Park, Arizona. End of a petrified log of the third forest. #1:/Petrified Forest National Park/med00253 ID. McKee, E.D. 253ct Petrified Forest National Park, Arizona. Petrified logs from the third forest. #1:/Petrified Forest National Park/med00254 ID. McKee, E.D. 254ct Petrified Forest National Park, Arizona. Remains of the second forest. #1:/Bryce Canyon National Park/med00263 ID. McKee, E.D. 263ct Bryce Canyon National Park, Utah. Bryce Temple. #1:/Bryce Canyon National Park/med00264 ID. McKee, E.D. 264ct Bryce Canyon National Park, Utah. Erosion results at Agua Canyon. #1:/Bryce Canyon National Park/med00265 ID. McKee, E.D. 265ct Bryce Canyon National Park, Utah. Queen Victoria. #1:/Grand Canyon National Park/med00266 ID. McKee, E.D. 266 Grand Canyon National Park, Arizona. Deposits of cryptocrystalline silica in carbonate rocks of the Supai Group and Pakoon Limestone near the base of the Watahomigi Formation near Bass Trail. Irregular layers or "bands" of white chert in thick-bedded limestone. Chert follows the planes of dipping cross- strata at right center. Photo by L.M. Hinchliffe. Figure R1-A, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00267 ID. McKee, E.D. 267ct Grand Canyon National Park, Arizona. Nankoweap cliff dwellings. 1970. #1:/Grand Canyon National Park/med00269 ID. McKee, E.D. 269 Grand Canyon National Park, Arizona. Deposits of cryptocrystalline silica in carbonate rocks of the Supai Group and Pakoon Limestone near the base of the Watahomigi Formation on Kaibab Trail. Crust or shells of chert-like, cryptocrystalline silica forming an irregular and inconsistent structure pattern in the limestone. Scale at top in centimeters. Photo by L.M. Hinchliffe. Figure R1-D, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00274 ID. McKee, E.D. 274 Grand Canyon National Park, Arizona. Concentrations of jasper in carbonate rocks of the Supai Group. Jasper lenses and irregular masses in massive aphanitic limestone of the Manakacha Formation in Parashant Canyon. Figure R3-D, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00275 ID. McKee, E.D. 275ct Grand Canyon National Park, Arizona. Colorado River and canyon, viewed from south Kaibab Trail. April 12, 1958. #1:/Grand Canyon National Park/med00276 ID. McKee, E.D. 276 Grand Canyon National Park, Arizona. Concentrations of jasper in carbonate rocks of the Supai Group. Mound of roughly elliptical thin layers of jasper embedded in sandy limestone of the Watahomigi Formation in Parashant Canyon. Figure R3-F, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00280 ID. McKee, E.D. 280ct Grand Canyon National Park, Arizona. Great angular unconformity, looking north from Moran Point. Colorado River at the bottom. #1:/Grand Canyon National Park/med00282 ID. McKee, E.D. 282 Grand Canyon National Park, Arizona. Assemblage of small invertebrates (x 3) in coquinoid limestone from the lower limestone (middle unit) of a valley fill. From the U.S. Geological Survey collection. 27425-PC, Granite Park: Inflatia, Ovatia, Composita, Glabrocingulum, Neilsoni a, Anematina, and Paladin. Photo provided by M. Gordon, Jr. Plate G2, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00284 ID. McKee, E.D. 284 Grand Canyon National Park, Arizona. Basal conglomerate of Watahomigi, which is at or near the base of the lower slope unit, consists mainly of angular to subangular pebbles of flint and chert. Five feet above the base of the formation fossil-bearing conglomerate, dominantly white chert, some large and subangular clasts at National Canyon. Figure J1-D, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00285 ID. McKee, E.D. 285 Grand Canyon National Park, Arizona. Basal conglomerate of Watahomigi, which is at or near the base of the lower slope unit, consists mainly of angular to subangular pebbles of flint and chert. Specimen from the base of Watahomigi in Havasu Canyon contains scattered chert pebbles and worn specimens of Composita. Figure Jl-E, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00287 ID. McKee, E.D. 287 Grand Canyon National Park, Arizona. Basal conglomerate of Watahomigi, which is at or near the base of the lower slope unit, consists mainly of angular to subangular pebbles of flint and chert. Basal conglomerate near Navajo Falls in Havasu Canyon. Figure Jl-G, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00288 ID. McKee, E.D. 288ct Grand Canyon National Park, Arizona. Specimen of glauconite sandstone from Bright Angel Shale in Indian Gardens. #1:/Grand Canyon National Park/med00290 ID. McKee, E.D. 290ct Grand Canyon National Park, Arizona. Horn coral, top of Redwall Limestone in Bridge Canyon. 1958. #1:/Grand Canyon National Park/med00291 ID. McKee, E.D. 291ct Grand Canyon National Park, Arizona. Monument on Kaibab Trail on the north rim. #1:/Grand Canyon National Park/med00294 ID. McKee, E.D. 294ct Grand Canyon National Park, Arizona. Parashant Canyon. 1971. #1:/Grand Canyon National Park/med00296 ID. McKee, E.D. 296ct Grand Canyon National Park, Arizona. Strata of Supai Group. Cliff of Manakacha Formation (M) in the right foreground. Massive beds of limestone and sandstone of Manakacha cliff unit show normal reddish brown in the lower part and black varnished surfaces in the upper part. Thin slope unit at the top is moderate reddish-orange. Wa, Watahomigi Formation; We, Wescogame Formation; E, Esplanade Sandstone. Strata form walls of Havasu Canyon above Supai Village. Figure MS2-C in U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00297 ID. McKee, E.D. 297ct Grand Canyon National Park, Arizona. Supai Formation in Tuckup Canyon, viewed north from a helicopter. 1971. #1:/Grand Canyon National Park/med00299 ID. McKee, E.D. 299 Grand Canyon National Park, Arizona. Wescogame Formation: conglomerate at the base of the cliff unit, bottom of Virgilian strata. Pebbles mostly siltstones and limestones, some cherts. Specimen of rounded clasts or red siltstone and gray limestone in Wescogame basal conglomerate at Separation Canyon. Figure J3-E, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00301 ID. McKee, E.D. 301ct Grand Canyon National Park, Arizona. Colorado River and Marble Canyon. #1:/Grand Canyon National Park/med00305 ID. McKee, E.D. 305 Grand Canyon National Park, Arizona. Basal conglomerate of Esplanade Sandstone and Pakoon Limestone, showing well-rounded surfaces of clasts and wide range in size from granule to cobble; composed almost entirely of red siltstones and gray limestones. Esplanade Sandstone along Bass Trail. Figure J5-F, U.S. Geological Survey Professional Paper 1173. #1:/McKee E.D. Collection/med00308 ID. McKee, E.D. 308ct Animal footprints in Coconino Sandstone of Aubrey Cliffs. Ruler for scale. Coconino County, Arizona.n.d. #1:/Grand Canyon National Park/med00309 ID. McKee, E.D. 309ct Grand Canyon National Park, Arizona. Compound cross-stratification, Middle Esplanade Sandstone, Supai Group on Apache Trail. 1960. #1:/Grand Canyon National Park/med00311 ID. McKee, E.D. 311 Grand Canyon National Park, Arizona. Scanning electron microscope photograph of Supai Group clay minerals: illite, from the Manakacha Formation in S B Canyon; x 680. Figure 05-B, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00312 ID. McKee, E.D. 312 Grand Canyon National Park, Arizona. Scanning electron microscope photograph of Supai Group clay minerals: illite from the Watahomigi Formation in Whitmore Wash; x 8500. Figure 05-C, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00313 ID. McKee, E.D. 313 Grand Canyon National Park, Arizona. Scanning electron microscope photograph of Supai Group clay minerals: authigenic chlorite flake from the Watahomigi Formation in Andrus Canyon; x 20,900. Figure 05-D, U.S. Geological Survey Professional Paper 1173. #1:/Petrified Forest National Park/med00315 ID. McKee, E.D. 315ct Petrified Forest National Park, Arizona. Standing fossilized tree. #1:/Grand Canyon National Park/med00316 ID. McKee, E.D. 316 Grand Canyon National Park, Arizona. Scanning electron microscope photograph of Supai Group clay minerals: possible smectite flakes from the Manakacha Formation in Tuckup Canyon; x 23,5000. Figure 05-G, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00318 ID. McKee, E.D. 318 Grand Canyon National Park, Arizona. Scanning electron microscope photograph of Supai Group clay minerals: corrensite-bearing sample, from the Watahomigi Formation in Andrus Canyon; x 9400. Figure 05-I, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00322 ID. McKee, E.D. 322 Grand Canyon National Park, Arizona. Pelecypods from the Wescogame Formation. All specimens from U.S. Geological Survey collection 24774, Guano Cave measured section. Photo by M. Gordon, Jr. Figure E14, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00323 ID. McKee, E.D. 323 Grand Canyon National Park, Arizona. Trackways of vertebrate animals in sand and fine-grained sandstone: Footprints (each about 4 inches long) with long toe marks on a slab from foreset beds of sandstone of the Wescogame Formation on the south section of Kaibab Trail. Figure E21-A, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00324 ID. McKee, E.D. 324 Grand Canyon National Park, Arizona. Trackways of vertebrate animals in sand and fine-grained sandstone: Set of overlapping footprints (each about 4 inches long) of a short-legged quadruped moving up a 24 degree-foreset bed of sandstone of Wescogame Formation on the south section of Kaibab Trail. Figure E21-B, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00325 ID. McKee, E.D. 325 Grand Canyon National Park, Arizona. Trackways of vertebrate animals in fine- grained sandstone of the Wescogame Formation: set of poorly preserved tracks made by a quadruped on a surface of unoriented sandstone slab in Parashant Canyon. Photo courtesy of U.S. National Park Service. Figure E22-A, U.S. Geological Survey Professional Paper 1173. #1:/McKee E.D. Collection-Grand Canyon National Park/med00330 ID. McKee, E.D. 330 Wavy surface of erosion at base of Manakacha cliff unit, near Twentyseven Mile Rapids in Marble Canyon. Channels on erosion surfaces within the Manakacha Formation, Grand Canyon. Woman at left for scale. Grand Canyon National Park. Coconino County, Arizona.n.d. Published as figure H3-B in U.S. Geological Survey. Professional paper 1173. 1982. #1:/Grand Canyon National Park/med00335 ID. McKee, E.D. 335ct Grand Canyon National Park, Arizona. East from a cave on Kaibab Trail. #1:/Grand Canyon National Park/med00337 ID. McKee, E.D. 337ct Grand Canyon National Park, Arizona. Coconino Sandstone at O'Neill Butte, viewed from Kaibab Trail. 6:30 a.m., July 1957. #1:/Grand Canyon National Park/med00340 ID. McKee, E.D. 340ct Grand Canyon National Park, Arizona. O'Neill Butte and Cremation Canyon, viewed from above. 1976. #1:/Grand Canyon National Park/med00349 ID. McKee, E.D. 349ct Grand Canyon National Park, Arizona. West from Yavapai Point. Light snow cover on the ground. February 19, 1955. #1:/Grand Canyon National Park/med00350 ID. McKee, E.D. 350ct Grand Canyon National Park, Arizona. From Yavapai rim path. Light snow. December 8, 1956. #1:/Grand Canyon National Park/med00351 ID. McKee, E.D. 351ct Grand Canyon National Park, Arizona. "Islands" in clouds filling the canyon at Moran Point in the afternoon, viewed from the south rim. November 28, 1951. #1:/Grand Canyon National Park/med00352 ID. McKee, E.D. 352ct Grand Canyon National Park, Arizona. Storm east of Hopi Point. Some clouds in the canyon. August 1957. #1:/Grand Canyon National Park/med00353 ID. McKee, E.D. 353ct Grand Canyon National Park, Arizona. Grand Canyon, viewed from Grand View Point. June 23, 1957. #1:/Grand Canyon National Park/med00355 ID. McKee, E.D. 355ct Grand Canyon National Park, Arizona. Shooting the rapids near Hermit Creek. 1972. #1:/Grand Canyon National Park/med00356 ID. McKee, E.D. 356ct Grand Canyon National Park, Arizona. Colorado River below Upset Rapids. Red waterfalls from rainstorm. 1975. #1:/Grand Canyon National Park/med00362 ID. McKee, E.D. 362ct Grand Canyon National Park, Arizona. Contorted gneiss in Hance Canyon. Photo by G. Billingsley, April 19, 1969. #1:/Grand Canyon National Park/med00366 ID. McKee, E.D. 366ct Grand Canyon National Park, Arizona. Specimen fossil trilobite, Anona sp., from Bright Angel Shale along Tonto Trail. #1:/Grand Canyon National Park/med00369 ID. McKee, E.D. 369ct Grand Canyon National Park, Arizona. Fossil fern from Hermit Shale along Kaibab Trail. #1:/Grand Canyon National Park/med00372 ID. McKee, E.D. 372ct Grand Canyon National Park, Arizona. Fossil tracks in Coconino Sandstone from Hermit Trail. #1:/Grand Canyon National Park/med00380 ID. McKee, E.D. 380ct Grand Canyon National Park, Arizona. Vulcan's Throne - a volcanic cone. Photo by E.T. Nichols. #1:/Grand Canyon National Park/med00381 ID. McKee, E.D. 381ct Grand Canyon National Park, Arizona. Strata of Supai Group on the west side of Toroweap Valley, south of the Colorado River. Window of Watahomigi Formation (Wa) with basalt flows on each side. Base of Manakacha Formation (M) cliff above and Redwall Limestone (R) cliff below. Total thickness of Watahomigi is 215 feet. Deep reddish brown of mudstone slopes largely concealed by talus. Limestone and sandstone ledges appear as dark brown on weathered surfaces. Marine fossils numerous on lower siltstone slopes and conglomerate ledges. Figure MS2-D, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/med00382 ID. McKee, E.D. 382ct Grand Canyon National Park, Arizona. Sunset on Cedar Ridge on South Kaibab Trail. July 12, 1957. #1:/Iran Earthquake 1965/med00411 ID. McKee, E.D. 411ct Iran Earthquake 1965. Single surviving house at Najav-abad not destroyed by the earthquake. 1965. #1:/Iran Earthquake 1965/med00412 ID. McKee, E.D. 412ct Iran Earthquake 1965. Earthquake-destroyed village of Najav-abad, west of Tehran. 1965. #1:/Australia/med00514 ID. McKee, E.D. 514ct Australia. Linear dune ridge in the Simpson Desert near Marysvale, showing curvature. 1976. #1:/Australia/med00518 ID. McKee, E.D. 518ct Australia. Salt pans, but few dunes, in the Simpson Desert near Oodnadatta. 1976. #1:/Australia/med00590 ID. McKee, E.D. 590ct Australia. Ripple marks on Precambrian quartzite in the Ellory Creek section west of Alice Springs. 1976. #1:/Australia/med00594 ID. McKee, E.D. 594ct Australia. Bitter Spring Dolomite, side view of Stromatolite, at Katapata Gap west of Alice Springs. 1976. #1:/Australia/med00603 ID. McKee, E.D. 603ct Australia. Overturned fold in silty dolomite, above gypsum bed in Precambrian rocks of Gillan Member, Bitter Spring Dolomite, at Ringwood Station, east of Alice Spring. Australia. 1976. #1:/Australia/med00608 ID. McKee, E.D. 608ct Australia. Stromatolites at Ross River Canyon. 1976. #1:/New Zealand/med00628 ID. McKee, E.D. 628ct New Zealand. Tasman Sea and sea stack near Fourteen Mile Bluff on the South Island. 1976. #1:/New Zealand/med00643 ID. McKee, E.D. 643ct New Zealand. Amuri Limestone (Upper Cretaceous-Paleocene) on the South Island: silic sponges in chert. 1976. #1:/New Zealand/med00644 ID. McKee, E.D. 644ct New Zealand. Cuspate ripples in restricted basin on the beach at Cape Foulwind on the South Island. 1976. #1:/India/med00664 ID. McKee, E.D. 664ct India. Giant talus in the Himalaya foothills near Dehra Dun, Sahasradhara. 1964. #1:/McKee E.D. Collection/med00709 ID. McKee, E.D. 709ct Obsidian and arrowheads found in Flagstaff area. Coconino County, Arizona.n.d. #1:/Sunset Crater Volcano National Monument/med00711 ID. McKee, E.D. 711ct Sunset Crater Volcano National Monument, Arizona. Sunset Crater, viewed from the east. #1:/Sunset Crater Volcano National Monument/med00715 ID. McKee, E.D. 715ct Sunset Crater Volcano National Monument, Arizona. Rim of Sunset Crater, viewed from the northeast. #1:/Sunset Crater Volcano National Monument/med00716 ID. McKee, E.D. 716ct Sunset Crater Volcano National Monument, Arizona. Rough margin of Bonito lava flow. #1:/McKee E.D. Collection/med00717 ID. McKee, E.D. 717ct Aerial view from east, of Mount Eden laccolith. Coconino County, Arizona.n.d. #1:/Sunset Crater Volcano National Monument/med00718 ID. McKee, E.D. 718ct Sunset Crater Volcano National Monument, Arizona. Lava squeeze-ups. #1:/Sunset Crater Volcano National Monument/med00726 ID. McKee, E.D. 726ct Sunset Crater Volcano National Monument, Arizona. Fumarole at the base of Sunset Crater. #1:/Grand Canyon National Park/med00746 ID. McKee, E.D. 746 Grand Canyon National Park, Arizona. Fossil seed ferns -Supaia- in fossil fern quarry near Kaibab Trail. #1:/White Sands National Monument/med00915 ID. McKee, E.D. 915ct White Sands National Monument, New Mexico. Sand structures at the top of a dune. Photo by J.R. Douglass, U.S. National Park Service, June 1, 1965. #1:/White Sands National Monument/med00923 ID. McKee, E.D. 923ct White Sands National Monument, New Mexico. Slump marks on a transverse dune. 1962. #1:/White Sands National Monument/med00927 ID. McKee, E.D. 927ct White Sands National Monument, New Mexico. Geologist making a latex rubber peel in a trench in a dune. Circa 1963. #1:/Africa/med00929 ID. McKee, E.D. 929ct Africa. Slump lines on the side of a dune in the Namib Desert, Namibia (South West Africa.) #1:/White Sands National Monument/med00932 ID. McKee, E.D. 932ct White Sands National Monument, New Mexico. Geologists standing in an excavation trench in a transverse dune. #1:/Great Sand Dunes National Monument And Preserve/med00933 ID. McKee, E.D. 933ct Great Sand Dunes National Monument and Preserve, Colorado. Sangre de Cristo Mountains in the background. #1:/White Sands National Monument/med00937 ID. McKee, E.D. 937ct White Sands National Monument, New Mexico. Transverse dune and main excavation trench from the lee side. 1963. #1:/White Sands National Monument/med00939 ID. McKee, E.D. 939ct White Sands National Monument, New Mexico. Geologists on ladders cleaning the face of the main trench in a barchan dune. 1963. #1:/McKee E.D. Collection/med00949 ID. McKee, E.D. 949ct Modern mudcracks at base of Hoskinnini Mesa. Navajo Indian Reservation. Navajo County, Arizona.n.d. #1:/McKee E.D. Collection-Sonora, Mexico/med00990 ID. McKee, E.D. 990ct West shore, Ensenada San Francisco, north of Guaymas. Sonora, Mexico.n.d. #1:/McKee E.D. Collection/med01007 ID. McKee, E.D. 1007ct Dike on south side of Shiprock, a volcanic neck, in the distance. San Juan County, New Mexico.n.d. #1:/White Sands National Monument/medb0044 ID. McKee, E.D. 44 White Sands National Monument, New Mexico. Sedimentary structures and morphology of interdune areas. Beveled surface of dune forests on the upwind side of a dune bordering the interdune area in the foreground. Figure 6-A, page 64, Journal of Research of the U.S. Geological Survey, v.3, no.1. #1:/White Sands National Monument/medb0046 ID. McKee, E.D. 46 White Sands National Monument, New Mexico. Sedimentary structures and morphology of interdune areas. Section in the test trench showing three layers of flat and irregularly bedded interdune deposits between dipping dune forests. Scale in inches. Figure 6-C, page 64, Journal of Research of the U.S. Geological Survey, v.3, no.1. #1:/White Sands National Monument/medb0048 ID. McKee, E.D. 48 White Sands National Monument, New Mexico. Sedimentary structures and morphology of interdune areas. Interdune area near locality 1. Figure 6-E, page 64, Journal of Research of the U.S. Geological Survey, v.3, no.1. #1:/White Sands National Monument/medb0073 ID. McKee, E.D. 73 White Sands National Monument, New Mexico. Avalanching sand by slumping and grain flowage down slipface of dunes. Small blocks of weakly cohesive sand formed from the damp crust in the upper part of the slump masses. The length of the base of the ripple is 6 inches (15 centimeters). Circa 1975. Figure 41-A, U.S. Geological Survey Professional Paper 1052. #1:/White Sands National Monument/medb0074 ID. McKee, E.D. 74 White Sands National Monument, New Mexico. Avalanching sand by slumping and grain flowage down slipface of dunes. Curving crest of barchanoid dune delineated by the top of the avalanching sand. Ripple length in lower left is 4 inches (10 centimeters). Circa 1975. Figure 41-B, U.S. Geological Survey Professional Paper 1052. #1:/White Sands National Monument/medb0076 ID. McKee, E.D. 76 White Sands National Monument, New Mexico. Avalanching sand by slumping and grain flowage down slipface of dunes. Scoop surface where the slump mass broke loose near the top of the slipface on the transverse dune. Circa 1975. Figure 41-D, U.S. Geological Survey Professional Paper 1052. #1:/White Sands National Monument/medb0077 ID. McKee, E.D. 77 White Sands National Monument, New Mexico. Series of steeply dipping cross- strata forming tabularplanar sets in barchanoid ridge dune. Strata tangential with basal bounding planes. Photo by E.T. Nichols, circa 1975. Figure 43, U.S. Geological Survey Professional Paper 1052. #1:/White Sands National Monument/medb0078 ID. McKee, E.D. 78 White Sands National Monument, New Mexico. Beveled remnant of barchan dunes in interdune area. Circa 1975. Figure 45, U.S. Geological Survey Professional Paper 1052. #1:/White Sands National Monument/medb0083 ID. McKee, E.D. 83 White Sands National Monument, New Mexico. Parabolic dunes. Vegetation anchoring the arms of the dunes. Individual dunes, including the dragging arms, average about 700 feet (215 meters) long in this area. Circa 1975. Figure 50-B, U.S. Geological Survey Professional Paper 1052. #1:/Grand Canyon National Park/medb0113 ID. McKee, E.D. 113 Grand Canyon National Park, Arizona. Ripple marks with high ripple indices and rounded crests in a slab of eolian-type sandstone, Coconino Sandstone, on Kaibab Trail. Circa 1975. Figure 138, U.S. Geological Survey Professional Paper 1052. #1:/Grand Canyon National Park/medb0117 ID. McKee, E.D. 117 Grand Canyon National Park, Arizona. Ripple marks on foreset surface of cross- strata, Coconino Sandstone on Kaibab Trail. Circa 1975. Figure 143, U.S. Geological Survey Professional Paper 1052. #1:/Grand Canyon National Park/medb0119 ID. McKee, E.D. 119 Grand Canyon National Park, Arizona. "Miniature terrace-and-cliff structure" or "stair-step fault structure" formed on foreset surface of Coconino Sandstone on Bunker Trail. White scale is 6 inches (15 centimeters) long. Circa 1975. Figure 145, U.S. Geological Survey Professional Paper 1052. #1:/Grand Canyon National Park/medb0125 ID. McKee, E.D. 125 Grand Canyon National Park, Arizona. Trails of millipedes in Coconino Sandstone. Low-angle foresets near base. Scale in inches. Circa 1975. Figure 149-A, U.S. Geological Survey Professional Paper 1052. #1:/Grand Canyon National Park/medb0275 ID. McKee, E.D. 275 Grand Canyon National Park, Arizona. Concentrations of jasper in carbonate rocks of the Supai Group. Horizontal surface of concentric layers of jasper in a massive bed of aphanitic limestone at the base of the Manakacha Formation in S B Canyon. Figure R3-E, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/medb0280 ID. McKee, E.D. 280 Grand Canyon National Park, Arizona. Typical "banded" jasper in limestone, Manakacha Formation in Parashant Canyon. #1:/Grand Canyon National Park/medb0288 ID. McKee, E.D. 288 Grand Canyon National Park, Arizona. Atokan Conglomerate, at the base of the upper slope unit of the Watahomigi Formation. Base of Atokan rocks, mostly of chert and reddish-brown jasper with angular, closely packed clasts. Specimen from S B Canyon, 85 feet above the base of the Watahomigi. Figure J2-A, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/medb0290 ID. McKee, E.D. 290 Grand Canyon National Park, Arizona. Atokan Conglomerate, at the base of an upper slope unit of the Watahomigi Formation. Base of Atokan rocks, mostly of chert and reddish-brown jasper with angular, closely packed clasts. Specimen from Thunder River Trail. Figure J2-C, U.S. Geological Survey Professional Paper 1173. #1:/Grand Canyon National Park/medb0315 ID. McKee, E.D. 315 Grand Canyon National Park, Arizona. Scanning electron microscope photograph of Supai Group clay minerals: random mixed layer clay bordering on illite from Esplanade Sandstone in Andrus Canyon; x 1000. Figure 05-F, U.S. Geological Survey Professional Paper 1173. #1:/Africa/medc0014 ID. McKee, E.D. 14ct Africa. Dune and interdune deposits in the northwestern Namib Desert, Namibia (South West Africa). The star dune in the background is approximately 300 feet high. Photo by E.T. Nichols. #1:/Africa/medc0196 ID. McKee, E.D. 196ct Africa. Slumps on barchan dune, 10 kilometers north of Walvis Bay, Namibia (South West Africa). 1977. #1:/Brazil/medc0200 ID. McKee, E.D. 200ct Brazil. Permian cross-stratified siltstone under Botucatu Sandstone at Serra de Esperanca, Parana. 1970. #1:/Grand Canyon National Park/medc0282 ID. McKee, E.D. 282ct Grand Canyon National Park, Arizona. Chuar granite(?), stromatolites of Middle Unit at Carbon Creek 1970. #1:/McKay E.J. Collection/mej00008 ID. McKay, E.J. 8ct West side of Grand Mesa showing Mancos shale in foreground, Mesaverde Formation in middle distance and Wasatch Formation near skyline. Colorado Plateau. Colorado. 1950. #1:/McKay E.J. Collection/mej00027 ID. McKay, E.J. 27ct Manganese-uranium concretions on outcrop and as they appeared during mining at the Brown deposit locality (Wasatch Fm). Powder River Basin. Wyoming. ca 1953. #1:/McKay E.J. Collection/mej00039 ID. McKay, E.J. 39ct Types of limy sandstone concretions, Wasatch Formation. Powder River Basin. Wyoming. ca. 1953. #1:/McKay E.J. Collection/mej00041 ID. McKay, E.J. 41ct Limy sandstone concretions, Wasatch Formation. Powder River Basin. Wyoming. ca. 1953. #1:/Embree G. Collection-Mount St. Helens*msh198008/memb0001 ID. Mount St. Helens Embree, G. 1ct August 7, eruption cloud seen from Interstate 80 between Pendleton and The Dalles. Washington. 1980. #1:/Embree G. Collection-Mount St. Helens*msh198008/memb0088 ID. Mount St. Helens Embree, G. 88ct Close-up view of Mel A. Kuntz in front of elastic material from May 18 debris flow. Skamania County, Washington. August 11, 1980. #1:/Yosemite National Park/mfe00001 ID. Matthes, F.E. 1 Yosemite National Park, California. Front of Half Dome. The cliff came into existence first by removal of thin rock sheets from a zone of nearly vertical joints, still visible in the shoulders at the northeast (left) end. The great monolith then began to exfoliate at its newly exposed surface, in plane shells curving under the old shells at the top. The old shells now form an overhanging cornice. Circa 1914. Plate 50-B, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/mfe00002 ID. Matthes, F.E. 2 Yosemite National Park, California. Northeast face of Half Dome, viewed from the north end of North Dome. The dark patch in the middle of the cliff face is not a shadow but is covered with black lichens flourishing in rainwater streaks. Circa 1913. #1:/Yosemite National Park/mfe00003 ID. Matthes, F.E. 3 Yosemite National Park, California. Half Dome, viewed from the platform to the northeast. View is in line with the main cliff face and shows it to be convex in profile, especially toward the top. This convexity is due to the tendency of new exfoliation partings, forming parallel to the cliff face, to curve under the old top shells. Overhang at the top was produced by rapid dropping away of new cliff sheets. Circa 1913. #1:/Yosemite National Park/mfe00004 ID. Matthes, F.E. 4 Yosemite National Park, California. Northeast summit of Half Dome, viewed from the saddle between the main body of the dome and subsidiary dome to the northeast, showing details of exfoliation. Circa 1913. #1:/Yosemite National Park/mfe00005 ID. Matthes, F.E. 5 Yosemite National Park, California. Overhanging top shells of Half Dome. Yosemite Valley in the background. Slight curvature would seem to indicate that the massive portion of the dome did not formerly extend far beyond the line of the present cliff face. Note the progressive decrease in the thickness of the shells toward the surface. Circa 1913. #1:/Yosemite National Park/mfe00006 ID. Matthes, F.E. 6 Yosemite National Park, California. Stubs of steeply inclined shells on the shoulder projecting from the northeast end of Half Dome. They are distinctly concave and form part of the hollow curve between the body of the main dome and that of the subsidiary dome. Circa 1913. #1:/Yosemite National Park/mfe00007 ID. Matthes, F.E. 7 Yosemite National Park, California. Fantastically shaped shell remnants near the summit of the subsidiary dome, viewed from the saddle, next to the main body of Half Dome. Clouds Rest is in the background. Circa 1913. #1:/Yosemite National Park/mfe00008 ID. Matthes, F.E. 8 Yosemite National Park, California. Half Dome, viewed from Upper Quarter Dome, on the south side of Tenaya Creek Canyon. Strong shadow across the shoulder discloses the master joint (or shear plane) that may have determined the trend of the northeast face of the dome. Lower Quarter Dome in the foreground, showing exfoliation sheets breaking off along imperfectly developed joints. Circa 1913. #1:/Yosemite National Park/mfe00009 ID. Matthes, F.E. 9 Yosemite National Park, California. Half Dome, viewed from Quarter Dome. In the foreground is a perched erratic situated near the highest level reached by the ice of an earlier epoch. Circa 1913. #1:/Yosemite National Park/mfe00010 ID. Matthes, F.E. 10 Yosemite National Park, California. The curving back of Half Dome is enveloped largely by a single, enormous shell. Its surface is not only striped with lichens, as are most cliffs in the Yosemite region, but it is fluted in places. The rock grains washed down from the summit have worn furrows in it several feet in depth. At the base are several imperfect arches produced by dropping off parts of shells. Circa 1913. Plate 50-A, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/mfe00011 ID. Matthes, F.E. 11 Yosemite National Park, California. Half Dome and Little Yosemite Valley, viewed from the edge of Starr King platform. At the lower edge is a small dome referred to elsewhere as Little Yosemite Dome. Circa 1913. #1:/Yosemite National Park/mfe00012 ID. Matthes, F.E. 12 Yosemite National Park, California. Half Dome, viewed from Panorama Point. It presents the appearance of a complete dome. 1913. #1:/Yosemite National Park/mfe00014 ID. Matthes, F.E. 14 Yosemite National Park, California. Half Dome, viewed from "Washburn's Turn" in the stage road south of Glacier Point, in line with the northeast face. The view shows the cliff to be not vertical but inclined at an angle of 72 degrees. Circa 1913. #1:/Yosemite National Park/mfe00015 ID. Matthes, F.E. 15 Yosemite National Park, California. Tenaya Creek Canyon, viewed from the summit of North Dome. The highest point is Clouds Rest. The Pinnacles are to the right of the summit with Quarter Dome under them. Mount Watkins is at the left edge. The ice line of the last glaciation is traceable across the lower half of the slope of Clouds Rest, beginning at the brow of Mount Watkins. Circa 1913. #1:/Yosemite National Park/mfe00016 ID. Matthes, F.E. 16 Yosemite National Park, California. The Quarter Domes, viewed from Basket Dome. They are evidently carved from a single monolith, bounded below by one of a set of distantly spaced inclined master joints. The timbered back slope is part of the Tertiary erosion surface, but slightly modified by earlier ice. Circa 1913. #1:/Yosemite National Park/mfe00018 ID. Matthes, F.E. 18 Yosemite National Park, California. Exfoliating granite on Lower Quarter Dome. This rock mass originally had angular edges and a sharp point, but these are now largely transformed into smooth curves of exfoliation. Circa 1913. Plate 48-C, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/mfe00019 ID. Matthes, F.E. 19 Yosemite National Park, California. The two Quarter Domes, viewed from the southwest. Circa 1913. #1:/Yosemite National Park/mfe00020 ID. Matthes, F.E. 20 Yosemite National Park, California. Disintegrating remnants of top shells on Upper Quarter Dome. Half Dome granite tends to disintegrate into flakes and splinters parallel to weathering surfaces. Residual boulders, once detached, develop concentric flakes. See rounded masses at the right. Circa 1913. #1:/Yosemite National Park/mfe00021 ID. Matthes, F.E. 21 Yosemite National Park, California. North face of Clouds Rest, viewed from the mouth of the hanging valley of Snow Creek. Circa 1913. #1:/Yosemite National Park/mfe00022 ID. Matthes, F.E. 22 Yosemite National Park, California. North face of Clouds Rest, viewed from Mount Watkins. About 4,000 feet of the entire height of the face (4,800 feet) is in view. The rock mass is traversed by only a few distantly spaced master joints and consists of gigantic monolithic masses each of which exfoliates in concentric shells independently of its neighbors. About 1,200 feet below the summit is a tier of shallow cirques, developed in exfoliating massive rock. The heavy shadows under them bring out a shoulder in the slope which accords with the ice line of the earlier epoch, as is demonstrated by the moraines lying on the adjacent slopes. Circa 1913. #1:/Yosemite National Park/mfe00024 ID. Matthes, F.E. 24 Yosemite National Park, California. Rock fa‡ade of Clouds Rest, viewed from Upper Quarter Dome. The granite is traversed by only a few approximately horizontal master joints and is otherwise wholly massive. Exfoliation is taking place everywhere parallel to the surface. The steep smooth chutes between the spurs are worn largely by snowslides. The spurs were all truncated by the Tenaya Glacier. An alcove with an overhanging roof has been developed in one place where the rock is divided by inward dipping joints. Circa 1913. #1:/Yosemite National Park/mfe00025 ID. Matthes, F.E. 25 Yosemite National Park, California. North face of Clouds Rest, viewed from Upper Quarter Dome. Residual boulders of disintegration are in the foreground. The truncation of spurs at the ice line is brought out by the heavy shadow on the lower part of the cliff face. Circa 1913. #1:/Yosemite National Park/mfe00027 ID. Matthes, F.E. 27 Yosemite National Park, California. Upper part of Tenaya Creek Canyon, viewed from Upper Quarter Dome. Though severely glaciated, this part of Tenaya Canyon is shaped not like a U trough but like a sharp-keeled boat. In the center is one of the steps of massive granite. At the left is a buttress of Mount Watkins. In the distance is part of the great head wall. The Tenaya Cascade is masked by the rock slopes of Clouds Rest on the right. Circa 1913. Plate 46-A, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/mfe00028 ID. Matthes, F.E. 28 Yosemite National Park, California. Great fa‡ade of Clouds Rest, viewed from Mount Watkins. No moraines cling to the steep, smooth rock face, but the highest level reached by the Tenaya Glacier can be determined approximately from the sculpture of the spurs. The highest level of the ice of the last glaciation is indicated by the upper limit of smoothed rock on the spur to the left of center. The highest level of the earlier ice is indicated by the shoulder on the truncated spur at the left. The trees stand on the unglaciated part of the spur. The deep hollows between the spurs are old ravines transformed into cirques by the sculpturing action of small local glaciers. The fa‡ade is composed almost throughout of massive granite, exfoliating at the surface, and has a height of 4,700 feet. Circa 1913. Plate 40-B, U.S. Geological Survey Professional Paper 160. 1930. #1:/Yosemite National Park/mfe00029 ID. Matthes, F.E. 29 Yosemite National Park, California. One of the pinnacles on the crest of Clouds Rest, viewed from the northeast. The entire mass is composed of exfoliation shells rounding over the crest. Both sides have been eaten into by nev‚, the north (right) side more vigorously than the south side; hence the asymmetry of the pinnacle. The entire crest is similarly asymmetric. Half Dome is in the background. Circa 1913. #1:/Yosemite National Park/mfe00031 ID. Matthes, F.E. 31 Yosemite National Park, California. Summit of Clouds Rest, viewed from the southwest. Two sets of exfoliation shells are in evidence; one nearly horizontal set which has formed parallel to the old erosion surface and one set steeply inclined northward (left), which has developed along the glaciated north face. Circa 1913. #1:/Yosemite National Park/mfe00032 ID. Matthes, F.E. 32 Yosemite National Park, California. Clouds Rest massif, looking north from Moraine Dome. View shows the cliff girt character of the mountain, which is a monadnock of massive granite rising above the glaciated Tertiary erosion surface. The little hanging valley and surrounding pinnacles may be remnants of a Cretaceous erosion surface. Circa 1913. #1:/Yosemite National Park/mfe00034 ID. Matthes, F.E. 34 Yosemite National Park, California. Curving shells on the south edge of Clouds Rest monadnock. New shells are developing parallel to the glacially undercut bluff curve under the older shells on top. Circa 1913. Photos mfe00034 and mfe0034a form a panorama. #1:/Yosemite National Park/mfe00036 ID. Matthes, F.E. 36 Yosemite National Park, California. Arched exfoliation shell. That exfoliation is due to expansion of the granite is demonstrated by the up- arching of this shell on the shoulder of Clouds Rest, which was prevented from expanding laterally. Circa 1914. Plate 48-A, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/mfe00037 ID. Matthes, F.E. 37 Yosemite National Park, California. Vertical panorama of Mount Watkins, viewed from Upper Quarter Dome. Mount Watkins is a gigantic monolith of Half Dome Granite, exposed by the excavation of Tenaya Canyon to a height of 3,000 feet. It constitutes another El Capitan. Its back forms one of the smoothly rounded rock waves of the billowy upland. Circa 1913. #1:/Yosemite National Park/mfe00038 ID. Matthes, F.E. 38 Yosemite National Park, California. Stoss side of Basket Dome, viewed from the mouth of the hanging valley of Snow Creek. The dark vertical lines are rainwater streaks accentuated by minute purple lichens. Circa 1913. #1:/Yosemite National Park/mfe00040 ID. Matthes, F.E. 40 Yosemite National Park, California. Summit of Basket Dome, viewed from the north, showing heavy layers of shells on the summit, terminating in overhanging edges on the stoss side. Circa 1913. #1:/Yosemite National Park/mfe00041 ID. Matthes, F.E. 41 Yosemite National Park, California. Summit and lee side of North Dome, viewed from the north. The Starr King group in the background. Circa 1913. #1:/Yosemite National Park/mfe00042 ID. Matthes, F.E. 42 Yosemite National Park, California. Cylinder Ridge, viewed from North Dome. A spur of Indian Ridge consisting of massive granite, rounded by long continued exfoliation. Note the relative rapidity with which disintegration proceeds along a locally developed zone of jointing. Circa 1913. #1:/Yosemite National Park/mfe00043 ID. Matthes, F.E. 43 Yosemite National Park, California. Weather pits in a slab on North Dome. These weather pits have been formed entirely since the earlier ice passed over and smoothed the crown of the dome. The ice of the last glacial stage did not reach this level. Several of the weather pits have expanded until they coalesce. Others are about to coalesce, the rock partitions between them being already partly broken down. Circa 1913. Plate 33-B, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/mfe00044 ID. Matthes, F.E. 44 Yosemite National Park, California. Royal Arches and Washington Column surmounted by North Dome. Royal Arches are sculptured in a slanting cliff face 1,500 feet high. North Dome rises 2,000 feet higher. The dark streak on the cliff on the left indicates the path of Royal Arch Cascade. Circa 1914. Plate 21-B, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/mfe00045 ID. Matthes, F.E. 45 Yosemite National Park, California. Western end of Royal Arches at the extreme right. Lesser arches are developed in exfoliating Half Dome Granite in the center. The inclined jointing, which sets in immediately to the left of the lesser arches, marks a body of granodiorite. Circa 1913. #1:/Yosemite National Park/mfe00046 ID. Matthes, F.E. 46 Yosemite National Park, California. Three-quarters profile view of Royal Arches, showing the inclination of rock sheets and in-curving of partings under the edge of the rock terrace, a feature characteristic of exfoliation. Half Dome in the background. Circa 1913. #1:/Yosemite National Park/mfe00047 ID. Matthes, F.E. 47 Yosemite National Park, California. Head of Yosemite Valley, viewed from Columbia Rock. In the center is the great head wall, surmounted by Half Dome. At the right is the promontory of Glacier Point, which conceals the upper canyon of the Merced River. At the left are North Dome, Royal Arches, Washington Column, and the mouth of Tenaya Canyon. Photo by J.T. Boysen. Circa 1914. Plate 16-B, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/mfe00051 ID. Matthes, F.E. 51 Yosemite National Park, California. Glaciated rock mass under Glacier Point. This rock mass, which was rounded off and smoothed by the Yosemite Glacier and the confluent Merced Glacier, consists of a single huge monolith, undivided by fractures for a height of 1,600 feet. Like the domes, it is exfoliating, that is, casting off shells from its surface. Circa 1914. Plate 43-B, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/mfe00055 ID. Matthes, F.E. 55 Yosemite National Park, California. Up the gorge of Illilouette Creek. Illilouette Fall in the distance. On the left are the exfoliating cliffs of Half Dome Granite, traversed by occasional master joints or shear planes. Circa 1913. #1:/Yosemite National Park/mfe00059 ID. Matthes, F.E. 59 Yosemite National Park, California. Vernal Fall, viewed from "Lady Franklin Rock." Circa 1913. #1:/Yosemite National Park/mfe00060 ID. Matthes, F.E. 60 Yosemite National Park, California. Vernal Fall at low water, showing the massive character of the rock. There is not a single parting in the 300-foot cliff. No notch is cut by the stream. The cliff recedes by the scaling off of huge vertical rock sheets. In the lower right corner is a fragment of the last rock sheet that broke off. Circa 1913. #1:/Yosemite National Park/mfe00061 ID. Matthes, F.E. 61 Yosemite National Park, California. Edge of Vernal Fall precipice. A thick rock sheet is about to detach itself; several fragments of sheets are wedged in the crevice. Circa 1913. #1:/Yosemite National Park/mfe00062 ID. Matthes, F.E. 62 Yosemite National Park, California. Vernal Fall precipice at low water. In the foreground are characteristic current scoops developed in the massive rock. Beyond, a dark line of moss and grass reveals an incipient parting, developing parallel to the cliff face. Circa 1913. #1:/Yosemite National Park/mfe00067 ID. Matthes, F.E. 67 Yosemite National Park, California. Illilouette Ridge and Glacier Point promontory, viewed from the east. The promontory ends abruptly in a 1000-foot cliff laid along a vertical east-west master joint. Circa 1913. #1:/Yosemite National Park/mfe00068 ID. Matthes, F.E. 68 Yosemite National Park, California. Nevada Fall and Liberty Cap. The Merced River here descends from the uppermost step of the giant stairway by falling 594 feet. Only the upper part of the fall leaps clear; the lower part glides in the form of a spreading apron down the steeply inclined base of the cliff. To the right of the Nevada Fall and above it are several typical ribbon cascades. To the left, at the foot of Liberty Cap, is a gulch which the river carved in glacial time. Through it is laid the zigzag trail that leads to Little Yosemite Valley. Circa 1914. Plate 25, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/mfe00071 ID. Matthes, F.E. 71 Yosemite National Park, California. Silhouette view of the gorge that separates Liberty Cap from the Nevada Fall platform. This gorge was, at one time, the channel of the Merced River and still carries off some of the flood waters in spring. The trail to the top of the Nevada Fall is laid through it. Circa 1913. #1:/Yosemite National Park/mfe00074 ID. Matthes, F.E. 74 Yosemite National Park, California. Merced River at the head of Nevada Fall. Shadows in the rock at the edge of the precipice indicate remnants of potholes, now about 6 feet above the level of the stream. Circa 1913. #1:/Yosemite National Park/mfe00076 ID. Matthes, F.E. 76 Yosemite National Park, California. Giant Stairway from Glacier Point. In the center is Nevada Fall, which leaps from the upper step, flanked by Liberty Cap. Below is Vernal Fall, which leaps from the lower step. On the far side of Little Yosemite Valley, which is behind Liberty Cap, are the water-streaked Cascade Cliffs, and beyond are the peaks of the High Sierra mantled with snow. At the left is Mount Florence. At the right is Mount Clark. Photo by A.C. Pillsbury, circa 1914. Plate 10, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/mfe00079 ID. Matthes, F.E. 79 Yosemite National Park, California. Row of gigantic monoliths. Shoulder of Liberty Cap on the right. Mount Broderick in the middle and Half Dome in the background. Circa 1913. #1:/Yosemite National Park/mfe00081 ID. Matthes, F.E. 81 Yosemite National Park, California. Front of Liberty Cap and Mount Broderick. Their sheer, hackly fronts were subjected to the quarrying action of the Merced Glacier. The V-shaped cleft between them was gouged out along a narrow zone of shattered rock. Circa 1914. Plate 44-B, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/mfe00084 ID. Matthes, F.E. 84 Yosemite National Park, California. Rear of Liberty Cap and Mount Broderick. Their curving backs and crowns were ground and polished by the overriding Merced Glacier. Both rock masses are roches moutonn‚es of gigantic size. Circa 1914. Plate 44-A, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/mfe00088 ID. Matthes, F.E. 88 Yosemite National Park, California. Buckled shell on the side of a small dome in Little Yosemite Valley. The upper slabs have been pushed down by the gradual thickening of a root of the stunted tree, which had wedged itself in a crack. Circa 1913. #1:/Yosemite National Park/mfe00090 ID. Matthes, F.E. 90 Yosemite National Park, California. Sloping rock floor of Little Yosemite Valley at the west base of the small dome. Note the complete absence of joints or cracks and the peculiar striped appearance of the floor. Circa 1913. #1:/Yosemite National Park/mfe00092 ID. Matthes, F.E. 92 Yosemite National Park, California. Boulder still in place at the end of a broad trail or stripe. A small pad of sand grains arrested by the boulder kills the lichens as the boulder advances by imperceptible degrees. Length of the trail is 20 feet. The older portion is becoming dimmed by a new growth of lichens. Circa 1913. #1:/Yosemite National Park/mfe00096 ID. Matthes, F.E. 96 Yosemite National Park, California. Glacial debris gravitating from the crown of the small dome in the Little Yosemite Valley and leaving narrow trails. These trails do not extend below a certain level since the inclination there becomes so great as to permit the rock fragments to slide or roll. Circa 1913. #1:/Yosemite National Park/mfe00098 ID. Matthes, F.E. 98 Yosemite National Park, California. Isolated pad of sand, held in place by a moss fringe, on an otherwise bare rock slope. The moisture in the sand promotes the growth of the moss to maintain a balance between them. Circa 1913. #1:/Yosemite National Park/mfe00102 ID. Matthes, F.E. 102 Yosemite National Park, California. One of the lateral moraines on the north side of Little Yosemite Valley. This moraine is composed largely of angular blocks torn by the glacier from the cliffs farther up in the Little Yosemite and in the upper Merced Canyon. The Sunrise and Soda Springs Trail follows the sandy hollow between this moraine and the next higher moraine. Circa 1914. Plate 30-B, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/mfe00105 ID. Matthes, F.E. 105 Yosemite National Park, California. Great morainal embankment, viewed from the top of Moraine Dome. In the foreground is the disintegrating upper slope of Moraine Dome, which was not touched by the ice of the last glacial stage. In the background is the Starr King group on the Yosemite upland. Circa 1914. Plate 31-B, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/mfe00108 ID. Matthes, F.E. 108 Yosemite National Park, California. End view of perched erratic of porphyritic Cathedral Granite, situated on the south side of Moraine Dome. South side of Little Yosemite Valley in the background. A dark line of trees indicates the highest moraine of the younger series. Circa 1913. #1:/Yosemite National Park/mfe00112 ID. Matthes, F.E. 112 Yosemite National Park, California. Residual wall about 8 feet high, situated at the western end of the summit of Moraine Dome. It consists of Half Dome Granite protected by an inclined dike of resistant aplite. Circa 1913. #1:/Yosemite National Park/mfe00113 ID. Matthes, F.E. 113 Yosemite National Park, California. View across Little Yosemite Valley from a point near Helen Lake (Starr King Lake?). In the center is Moraine Dome, with the morainal embankment clinging to its sides. Across the wooded slopes beyond, the course of the moraine is marked by a white line produced by the blocks of granite on its crest. On the left is Clouds Rest. To the right of the moraine dome is Sugar Loaf (Bunnell Point). Circa 1914. Plate 31-A, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/mfe00114 ID. Matthes, F.E. 114 Yosemite National Park, California. Little Yosemite Valley. Through this broad antechamber the Merced River approaches the main valley. On the right are the Cascade Cliffs streaked by innumerable temporary cascades; on the left is Sugar Loaf (Bunnell Point). Circa 1914. Plate 4-A, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/mfe00115 ID. Matthes, F.E. 115 Yosemite National Park, California. Cascade Cliffs and Little Yosemite Valley. In few other places in the Yosemite region is the granite more continuously massive than in the Cascade Cliffs. Only one horizontal master joint divides the rock (in the lower left.) The scales on the cliffs are merely surficial features due to exfoliation. The dark streaks indicate the paths followed by the ribbon cascades which descend from the upland in the spring, when the snow is melting, and from which the cliffs take their name. In the background is Sugar Loaf (Bunnell Point). Circa 1914. Plate 45-A, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/mfe00118 ID. Matthes, F.E. 118 Yosemite National Park, California. End of an exfoliating spur on the west side of the Starr King group. This spur was not overtopped by the earlier ice. It owes its smoothly rounded form wholly to exfoliation. Circa 1913. #1:/Yosemite National Park/mfe00119 ID. Matthes, F.E. 119 Yosemite National Park, California. Sandy flat in the Illilouette Valley and Starr King group. This barren flat is produced by a bed of sand and gravel deposited in a temporary lake that lay between the Illilouette Glacier and a lobe of the Merced Glacier which blocked the valley. Circa 1914. Plate 32-A, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/mfe00120 ID. Matthes, F.E. 120 Yosemite National Park, California. Lateral moraines of the Merced Glacier on the south side of Little Yosemite Valley. The view was taken from the highest moraine of the series and shows the second highest. In the background is Clouds Rest. Circa 1914. Plate 32-B, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/mfe00124 ID. Matthes, F.E. 124 Yosemite National Park, California. Hanging valley of Yosemite Creek and Yosemite Falls, viewed from Glacier Point. It is the most striking example of a hanging valley with a waterfall leaping from its mouth to be found in the Yosemite region. At the left is the overhanging rock of Glacier Point. Photo by A.C. Pillsbury, circa 1914. Plate 9-B, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/mfe00125 ID. Matthes, F.E. 125 Yosemite National Park, California. Silhouette profile of the cliff at Glacier Point. The man at the top stands on Photographers Rock, the smaller of the two overhanging slabs at the edge of the great precipice. Half Dome in the background. Photo by A.C. Pillsbury, circa 1914. Plate 20-B, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/mfe00128 ID. Matthes, F.E. 128 Yosemite National Park, California. Staircase Falls, dropping from successive steps in diagonally jointed granodiorite. Circa 1913. #1:/Yosemite National Park/mfe00129 ID. Matthes, F.E. 129 Yosemite National Park, California. Profile Rock or Taft Point, a promontory on the south side of Yosemite Valley, undercut by a brooklet flowing along a diagonal zone of shearing and entrenching itself diagonally downward with the dip of the shear planes. Circa 1913. #1:/Yosemite National Park/mfe00131 ID. Matthes, F.E. 131 Yosemite National Park, California. Yosemite Valley, viewed from Glacier Point Trail above Union Point. Sentinel Rock on the left; beyond are the Cathedral Rocks and El Capitan on the right. Circa 1913. #1:/Yosemite National Park/mfe00134 ID. Matthes, F.E. 134 Yosemite National Park, California. Yosemite Falls and surrounding cliffs, viewed from the valley floor. Only the head of Lower Yosemite Fall is visible through the trees. Dark zones of vegetation crossing the cliffs on the left reveal narrow terraces developed along zones of sheared rock. Sparseness of vegetation in the intermediate spaces is indicative of the absence of joints in the rock. Circa 1913. #1:/Yosemite National Park/mfe00147 ID. Matthes, F.E. 147 Yosemite National Park, California. Looking down the channel through which the water from Upper Yosemite Fall runs off. The diffused action of the descending water has given rise to smoothly rounded surfaces, but the concentrated flow of the stream has produced an incised channel, primarily by the removal of joint blocks. Circa 1913. #1:/Yosemite National Park/mfe00151 ID. Matthes, F.E. 151 Yosemite National Park, California. Yosemite Point, Lost Arrow, and neighboring cliffs, all traversed by inclined partings, viewed from Yosemite Falls trail. Circa 1913. #1:/Yosemite National Park/mfe00153 ID. Matthes, F.E. 153 Yosemite National Park, California. Brink of the precipice of Upper Yosemite Fall. The edge was originally square cut, but it has become rounded by the casting off of successive shells. A part of an old, sharply curved shell still remains in place. Circa 1914. Plate 48-B, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/mfe00159 ID. Matthes, F.E. 159 Yosemite National Park, California. Yosemite Valley and the High Sierra beyond. Circa 1913. Plate 15, U.S. Geological Survey Professional Paper 160. Synthetic picture drawn from a number of photographs. #1:/Yosemite National Park/mfe00165 ID. Matthes, F.E. 165 Yosemite National Park, California. The High Sierra, viewed from El Capitan. Half Dome and the head of Yosemite Valley in the center. Freshly fallen snow whitens the distant peaks and gives them a wintry aspect representative in some measure of the conditions that prevailed during the ice age when large glaciers extended from the High Sierra down to the Yosemite region. Circa 1914. Plate 11-A, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/mfe00166 ID. Matthes, F.E. 166 Yosemite National Park, California. Massive exfoliating base of El Capitan (right), pinnacled ridge developed in the zone of complex jointing adjoining El Capitan on the west, and the square-cut recess produced by Ribbon Fall in vertically jointed rock. Circa 1913. #1:/Yosemite National Park/mfe00168 ID. Matthes, F.E. 168 Yosemite National Park, California. Hanging valley of Bridalveil Creek, showing its pronounced form which is controlled, in large measure, by sparse diagonal joint structures. The valley has been occupied by ice, probably in the form of a more or less stagnant lobe of the main Yosemite Glacier, and is not believed to have been significantly altered by glacial erosion. Circa 1913. #1:/Yosemite National Park/mfe00172 ID. Matthes, F.E. 172 Yosemite National Park, California. One of the best preserved moraines of the older series. Most of the older moraines have long since lost their ridge forms and can be identified with certainty only by the character of their constituent rock materials. This moraine is situated below the Wawona Road south of Turtleback Dome. Circa 1914. Plate 34-A, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/mfe00180 ID. Matthes, F.E. 180 Yosemite National Park, California. Part of Ostrander Lake, a cirque lake on the north side of Horse Ridge. The exfoliating ice-corroded slope of the cirque bowl is surmounted by a precipitous frost-sapped headwall. Circa 1914. #1:/Yosemite National Park/mfe00184 ID. Matthes, F.E. 184 Yosemite National Park, California. Western extremity of Horse Ridge. The crest of the ridge has been consumed by the recession of the cirque wall. The wall is made up of preglacial shells developed parallel to the unglaciated southern slope; the ice-corroded slope below shows shells developed parallel to its own surface. Circa 1914. #1:/Yosemite National Park/mfe00187 ID. Matthes, F.E. 187 Yosemite National Park, California. Joint blocks loosened by frost. The large block was quarried by the glacier from the headwall of the cirque above Ostrander Lake. Frost has since split it into minor blocks. Many of the blocks quarried by glaciers are first loosened by frost. Circa 1914. Plate 42-B, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/mfe00189 ID. Matthes, F.E. 189 Yosemite National Park, California. Eastward along the frost-sapped precipice of Horse Ridge. In the background is a stretch of Buena Vista Crest, a feature essentially similar to this ridge. Circa 1914. #1:/Yosemite National Park/mfe00194 ID. Matthes, F.E. 194 Yosemite National Park, California. Characteristic aspect of a Wisconsin moraine situated on a smooth ice-scoured rock slope on the east side of Yosemite Creek valley. All the fine material has been washed away and only an irregular string of boulders remains. In the middle distance, from the large yellow pine to the right edge of the view, is a portion of the same moraine lying on a flat where the effect of rainwash has been slight. There, much of the finer debris remains in place and permits the growth of Manzanita bushes. Circa 1914. #1:/Yosemite National Park/mfe00196 ID. Matthes, F.E. 196 Yosemite National Park, California. Part of the course of Yosemite Creek through a region of massive unjointed granite. The rock on the interfluves exfoliates convexly, but under the stream channel it exfoliates concavely. There is no sand in the streambed, and the rock is clearly visible under the water. Circa 1914. #1:/Yosemite National Park/mfe00199 ID. Matthes, F.E. 199 Yosemite National Park, California. Solitary large erratic on the crest of the ridge north of Mount Watkins. It was deposited by overflow ice from the Tuolumne basin in pre-Wisconsin times. Circa 1914. #1:/Yosemite National Park/mfe00217 ID. Matthes, F.E. 217 Yosemite National Park, California. Moraine composed of angular blocks. This moraine lies on the edge of a glacial cirque on the west shoulder of Mount Hoffman. The blocks have suffered hardly any wear in the short distance they have traveled and still have the sharply angular forms with which they were quarried from the cirque. Circa 1914. Plate 42-A, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/mfe00226 ID. Matthes, F.E. 226 Yosemite National Park, California. Up Hetch Hetchy Valley from the trail to Lake Eleanor. Kolana Rock on the right. North Dome on the left. Circa 1914. #1:/Yosemite National Park/mfe00227 ID. Matthes, F.E. 227 Yosemite National Park, California. Outlet of Hetch Hetchy Valley and site of a dam to be constructed for the water supply of San Francisco. Circa 1914. #1:/Yosemite National Park/mfe00228 ID. Matthes, F.E. 228 Yosemite National Park, California. Hetch Hetchy Valley as it appeared before it was transformed into a reservoir. Although only half as long and half as wide, the Hetch Hetchy bears a strong resemblance to the Yosemite in general form as well as in cliff sculpture. Kolana Rock on the right; a cliff resembling El Capitan on the left. Circa 1914. Plate 5-B, U.S. Geological Survey Professional Paper 160. Photos mfe00228 and mfe00229 form a panorama. #1:/Yosemite National Park/mfe00229 ID. Matthes, F.E. 229 Yosemite National Park, California. Hetch Hetchy Valley as it appeared before it was transformed into a reservoir. Although only half as long and half as wide, the Hetch Hetchy bears a strong resemblance to the Yosemite in general form as well as in cliff sculpture. Kolana Rock on the right; a cliff resembling El Capitan on the left. Circa 1914. Plate 5-B, U.S. Geological Survey Professional Paper 160. Photos mfe00228 and mfe00229 form a panorama. #1:/Yosemite National Park/mfe00230 ID. Matthes, F.E. 230 Yosemite National Park, California. Down the Grand Canyon of the Tuolumne River and Hetch Hetchy Valley in the distance. Kolana Rock in the center. Circa 1914. #1:/Yosemite National Park/mfe00232 ID. Matthes, F.E. 232 Yosemite National Park, California. Poopenaut Valley and the Tuolumne Canyon beyond. Circa 1914. #1:/Yosemite National Park/mfe00237 ID. Matthes, F.E. 237 Yosemite National Park, California. Southwest up Ten Lakes Basin, viewed from its western rim. At the extreme right are the overhanging cliffs of the rim, undercut by frost sapping. Circa 1914. #1:/Yosemite National Park/mfe00239 ID. Matthes, F.E. 239 Yosemite National Park, California. Double Rock, viewed from the plateau to the south. Immediately beyond them is the Grand Canyon of the Tuolumne River. Circa 1914. #1:/Yosemite National Park/mfe00242 ID. Matthes, F.E. 242 Yosemite National Park, California. Cirque at the head of the valley of Yosemite Creek. The lake in the bowl has been transformed by alluviation into a wet meadow. The trail to Ten Lakes Basin crosses the saddle in the background. Circa 1914. #1:/Yosemite National Park/mfe00243 ID. Matthes, F.E. 243 Yosemite National Park, California. Erratic boulder with a layer partly flaked off, situated on a spur of the ridge northeast of White Wolf. The boulder was left by a pre-Wisconsin ice flood. Circa 1914. #1:/Yosemite National Park/mfe00256 ID. Matthes, F.E. 256 Yosemite National Park, California. Residual mass of andesite breccia overlying columnar lava on the northwestern part of Rancheria Mountain. Circa 1914. #1:/Yosemite National Park/mfe00257 ID. Matthes, F.E. 257 Yosemite National Park, California. Cliff of andesite breccia, including water-worn boulders of granite, on the summit of Rancheria Mountain. Circa 1914. #1:/Yosemite National Park/mfe00259 ID. Matthes, F.E. 259 Yosemite National Park, California. North across the upper part of Lake Vernon, which lies in a region of prevailing massive granite. Mahan Peak on the right. Circa 1914. #1:/Yosemite National Park/mfe00260 ID. Matthes, F.E. 260 Yosemite National Park, California. Absolutely fissureless massive granite, smoothed by ice, near the outlet of Lake Vernon. The glacier moved toward the background. Circa 1914. #1:/Yosemite National Park/mfe00261 ID. Matthes, F.E. 261 Yosemite National Park, California. Falls Creek valley, viewed from the bridge below Lake Vernon, a valley of essentially massive granite. Only a few sparse trees can find a roothold. Circa 1914. #1:/Yosemite National Park/mfe00262 ID. Matthes, F.E. 262 Yosemite National Park, California. Bridge on Fall Creek, below Lake Vernon. The almost complete absence of fissures in the granite gives rise to bare areas many acres in extent. Circa 1914. #1:/Yosemite National Park/mfe00264 ID. Matthes, F.E. 264 Yosemite National Park, California. Sugar Loaf and Bunnell Point, viewed from Moraine Dome. From this angle, Sugar Loaf is seen to be a dome-crowned spur of the north wall of Little Yosemite Valley. It has been repeatedly overridden by the Merced Glacier but has escaped destruction because it is composed largely of massive rock. Beyond is the exfoliating cliff of the promontory known as Bunnell Point. To the left of it, in the distance, are the ice-smoothed rock benches that flank the upper gorge of the Merced River. Circa 1914. Plate 45-B, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/mfe00267 ID. Matthes, F.E. 267 Yosemite National Park, California. Broad expanse of massive, undivided granite on a rock bench along the upper Merced gorge. The total absence of vegetation is due to the absence of fractures, or crevices. Every tree or bush along the margin is rooted in either a joint or exfoliation crack. Circa 1914. #1:/Yosemite National Park/mfe00269 ID. Matthes, F.E. 269 Yosemite National Park, California. Upper Merced gorge, viewed from the rock bench on the north side. The rock is remarkably massive, being traversed by joints only at considerable intervals. The Merced Glacier quarried away a few blocks on the left. The glacier must have had very little effect on the landscape. Lateral moraines are visible in the timber belt in the background. Circa 1914. #1:/Yosemite National Park/mfe00272 ID. Matthes, F.E. 272 Yosemite National Park, California. Portion of the granite floor of upper Merced Canyon, over which the ice dragged heavy boulders from right to left. Just beyond the hammer is a series of parabolic tension cracks produced by a boulder that was dragged without turning, that is, without causing impact. Far to the left of the hammer and in the right foreground are lunar chatter marks, as Gilbert calls them, produced by pressure from pointed boulders. Circa 1914. #1:/Yosemite National Park/mfe00273 ID. Matthes, F.E. 273 Yosemite National Park, California. Tension cracks produced by ice-dragged boulders in a band of aplite. The ice moved from right to left. The cracks die out in the adjoining granite, as the latter rock has greater tensile strength than aplite and stretched under the stress of the dragging boulders. Circa 1914. #1:/Yosemite National Park/mfe00275 ID. Matthes, F.E. 275 Yosemite National Park, California. Exceptionally fine series of chatter marks on the back of a roche moutonn‚e, near the lower end of Florence Canyon. The conditions appear to be particularly favorable for the production of such marks on ascending rock surfaces. Circa 1914. #1:/Yosemite National Park/mfe00276 ID. Matthes, F.E. 276 Yosemite National Park, California. Silverlace Falls on the Merced River, About 1 mile below Merced Lake. The water glides in a thin sheet composed of rhythmically overlapping waves over a surface laid bare by the removal of exfoliation slabs. The mild roughness of the surface gives rise to considerable friction. Circa 1914. #1:/Yosemite National Park/mfe00277 ID. Matthes, F.E. 277 Yosemite National Park, California. Trail across the glaciated rock floor of Merced Canyon below Merced Lake. The trail has to be marked by a row of boulders, as horses leave scarcely any tracks on the hard granite. Circa 1914. #1:/Yosemite National Park/mfe00278 ID. Matthes, F.E. 278 Yosemite National Park, California. Glaciated floor and side of upper Merced Canyon. All the rock features shown are smoothed and polished by the ice. In few places in the world is glacier polish more abundant than here. The row of stones in the foreground serves to mark the trail across the otherwise featureless rock floor. Circa 1914. Plate 36, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/mfe00282 ID. Matthes, F.E. 282 Yosemite National Park, California. Merced Lake lies in a Yosemite-like stretch of the upper Merced Canyon. Its basin, hollowed from the granite by the ancient Merced Glacier, is in the process of being filled with river-borne sand and gravel and will, in time, be replaced by a level floor analogous to that of Yosemite Valley. At the head of the lake is the forested delta of the river. Circa 1914. Plate 12-B, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/mfe00283 ID. Matthes, F.E. 283 Yosemite National Park, California. Knob of massive granite on the north side of Merced Lake outlet, showing strong glacial striae ascending down-valley at an angle of 16 degrees. Circa 1914. #1:/Yosemite National Park/mfe00289 ID. Matthes, F.E. 289 Yosemite National Park, California. Glacial lake in a shallow cirque northeast of Mount Clark and the serrate crest separating it from the canyon of Gray Peak Fork. Circa 1914. #1:/Yosemite National Park/mfe00291 ID. Matthes, F.E. 291 Yosemite National Park, California. South from the summit of Mount Clark, overlooking the entire Clark Range. The peaks in order of distance: Gray Peak and Red Peak (almost in line with each other), Ottoway Peak, Merced Peak, and Triple Divide Peak on the left. Circa 1914. #1:/Yosemite National Park/mfe00297 ID. Matthes, F.E. 297 Yosemite National Park, California. Head of upper Merced basin, viewed from the shoulder north of Washburn Lake. Below is the upper Merced Canyon, and beyond are some of the flanking rock benches and hanging valleys carved from prevailingly massive granite. On the right are the peaks of the Clark Range, and to the left of them is the sharp crest which connects with Mount Lyell. Circa 1914. Plate 13-B, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/mfe00298 ID. Matthes, F.E. 298 Yosemite National Park, California. Lyell Fork Merced River, viewed from a Point 1 mile south of Mount Florence. The unnamed mountain on the left obscures Electra Peak. In the middle is Foerster Peak. A distinct sap line extends from under this peak westward. Circa 1914. Photos mfe00298 and mfe00299 form a panorama. #1:/Yosemite National Park/mfe00299 ID. Matthes, F.E. 299 Yosemite National Park, California. Lyell Fork Merced River, viewed from a Point 1 mile south of Mount Florence. The unnamed mountain on the left obscures Electra Peak. In the middle is Foerster Peak. A distinct sap line extends from under this peak westward. Circa 1914. Photos mfe00298 and mfe00299 form a panorama. #1:/Yosemite National Park/mfe00303 ID. Matthes, F.E. 303 Yosemite National Park, California. Characteristic storm-bent tree at timber line above Ireland Lake is a white bark pine growing prostrate along the ground in the direction of least resistance with respect to the prevailing winds. Circa 1914. Plate 6-A, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/mfe00305 ID. Matthes, F.E. 305 Yosemite National Park, California. South across the lake above Fletcher Lake, showing a glacial cirque with the impounding moraine dam at its mouth. Circa 1914. #1:/Yosemite National Park/mfe00308 ID. Matthes, F.E. 308 Yosemite National Park, California. Lake at the head of Emeric Creek. Tuolumne Pass in the background. The directive influence of master joints on glacial quarrying is well illustrated. Circa 1914. #1:/Yosemite National Park/mfe00312 ID. Matthes, F.E. 312 Yosemite National Park, California. Emeric Lake and exfoliating spur. Circa 1914. #1:/Yosemite National Park/mfe00315 ID. Matthes, F.E. 315 Yosemite National Park, California. Southeast from the ridge on the east side of Long Meadow, across the spurs of the Cathedral Range. The peaks from left to right: Vogelsang Peak, Mount Florence, and Foerster Peak. Remnants of preglacial, probably Pliocene, slopes descend toward the Merced basin on the right. Circa 1914. #1:/Yosemite National Park/mfe00316 ID. Matthes, F.E. 316 Yosemite National Park, California. Columbia Finger, whose narrow crest was spared by the ice, viewed from Long Meadow. Circa 1914. #1:/Yosemite National Park/mfe00317 ID. Matthes, F.E. 317 Yosemite National Park, California. Down Long Meadow. Circa 1914. #1:/Yosemite National Park/mfe00319 ID. Matthes, F.E. 319 Yosemite National Park, California. Phenocrysts of feldspar left in relief on the surface of Cathedral Granite at Long Meadow. Circa 1914. #1:/Yosemite National Park/mfe00320 ID. Matthes, F.E. 320 Yosemite National Park, California. Exceptionally fine anticline of exfoliation in a roof-like ridge of massive granite on Sunrise Mountain. The ridge has not been overtopped by the ice, but the slope in front of it has been repeatedly over-swept. Thus, the ridge has been truncated and its structure revealed. Circa 1914. #1:/Yosemite National Park/mfe00322 ID. Matthes, F.E. 322 Yosemite National Park, California. Columbia Finger, another unglaciated crest. The ice split on the ridge in the foreground. Circa 1914. #1:/Yosemite National Park/mfe00323 ID. Matthes, F.E. 323 Yosemite National Park, California. End view of a attenuated crest that marks the highest level of the ice floods in the region north of Columbia Finger (in the background). Circa 1914. #1:/Yosemite National Park/mfe00325 ID. Matthes, F.E. 325 Yosemite National Park, California. Matthes Crest, south of Echo Peak. It is equally steep on both sides and forms a narrow blade. The highest ice level is indicated by the dark line of shadows at the extreme left and again, less definitely, by the plucked exfoliation arches on the right. Circa 1914. #1:/Yosemite National Park/mfe00326 ID. Matthes, F.E. 326 Yosemite National Park, California. Echo Peaks and the Cockscomb. These craggy pinnacles are the only features in the landscape shown that have not been overwhelmed by the glacial ice. The massive mountains which they surmount have been repeatedly over-swept from left to right and owe their rounded forms largely to the grinding action of the ice. The upper limit of glaciation is at the immediate base of the pinnacles. Circa 1914. Plate 40-A, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/mfe00327 ID. Matthes, F.E. 327 Yosemite National Park, California. Cathedral Peak, the remarkable natural edifice that stands at the northwest end of the Cathedral Range. Cathedral Lake, in the foreground, occupies a basin excavated in the granite by the ancient glaciers. Circa 1914. Plate 12-A, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/mfe00328 ID. Matthes, F.E. 328 Yosemite National Park, California. Glacial grooves on the border of a lake in Cathedral Pass. The glacier polish has disappeared, for the most part, as a result of intense frost action; but the grooves, being deep, remain in evidence. The ice came from a cirque on the right. Circa 1914. Plate 35-A, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/mfe00329 ID. Matthes, F.E. 329 Yosemite National Park, California. South side of Cathedral Peak, clearly showing the structure of the peak which appears to be composed of a cluster of huge granite slivers parted by slightly concave fractures converging upward. Circa 1914. #1:/Yosemite National Park/mfe00341 ID. Matthes, F.E. 341 Yosemite National Park, California. Fairview Dome, viewed from the north. Circa 1917. #1:/Yosemite National Park/mfe00346 ID. Matthes, F.E. 346 Yosemite National Park, California. Glaciated mountain and valley floor of massive granite about three-quarters of a mile west of Tenaya Lake. Glacier boulders in the foreground. Circa 1917. #1:/Yosemite National Park/mfe00347 ID. Matthes, F.E. 347 Yosemite National Park, California. Tenaya basin, viewed from the rim of May Lake. Cathedral Peak on the left. Tenaya Lake on the right. Circa 1917. #1:/Yosemite National Park/mfe00348 ID. Matthes, F.E. 348 Yosemite National Park, California. Tenaya Lake. Cathedral Peak in the distant right background. Circa 1917. #1:/Yosemite National Park/mfe00354 ID. Matthes, F.E. 354 Yosemite National Park, California. East side of a hill of exfoliating granite southwest of Tenaya Lake. Circa 1917. #1:/Yosemite National Park/mfe00358 ID. Matthes, F.E. 358 Yosemite National Park, California. Ice-plucked ledge of closely jointed metamorphic limestone, near May Lake. Circa 1917. #1:/Yosemite National Park/mfe00361 ID. Matthes, F.E. 361 Yosemite National Park, California. Ice-plucked and rounded granite on the rim of May Lake. The white rock in the middle distance is metamorphic limestone. Circa 1917. #1:/Yosemite National Park/mfe00372 ID. Matthes, F.E. 372 Yosemite National Park, California. Mount Maclure and Maclure Glacier. The V- shaped moraine loop is presumably of post-Pleistocene date. Circa 1917. #1:/Yosemite National Park/mfe00373 ID. Matthes, F.E. 373 Yosemite National Park, California. Mount Lyell and Lyell Glacier. Mount Lyell stands at the head of the Merced River and Tuolumne River and is the culminating peak in the central part of the Sierra Nevada. Lyell Glacier is the largest body of ice in the park. Circa 1914. Plate 14, U.S. Geological Survey Professional Paper 160. Photos mfe00373 and mfe00374 form a panorama. #1:/Yosemite National Park/mfe00374 ID. Matthes, F.E. 374 Yosemite National Park, California. Mount Lyell and Lyell Glacier. Mount Lyell stands at the head of the Merced River and Tuolumne River and is the culminating peak in the central part of the Sierra Nevada. Lyell Glacier is the largest body of ice in the park. Circa 1914. Plate 14, U.S. Geological Survey Professional Paper 160. Photos mfe00373 and mfe00374 form a panorama. #1:/Yosemite National Park/mfe00375 ID. Matthes, F.E. 375 Yosemite National Park, California. Crest of the Sierra Nevada and head of Tuolumne basin. Though deeply scalloped by glacial cirques, this part of the crest still bears remnants of its preglacial topography, thereby showing clearly that the range was never completely domed over by an ice cap. Koip Peak, with unglaciated summit and spur is on the left. Blacktop Peak, also unglaciated, is to the right of center. The unglaciated summit of Parker Peak looms over a saddle in the crest. Lyell Canyon is in the middle distance. Circa 1914. Plate 41-A, U.S. Geological Survey Professional Paper 160. #1:/Matthes F.E. Collection-Yosemite National Park/mfe0037a ID. Matthes, F.E. 37a Vertical panorama of Mount Watkins from upper Quarter Dome. A gigantic monolith of Half Dome granite, exposed by the excavation of Tenaya Canyon to a height of 3,000 feet. It constitutes another El Capitan. Its back forms one of the smoothly rounded rock waves of the billowy upland. Yosemite National Park. Mariposa County, California. ca. 1913. #1:/Devils Postpile National Monument/mfe00423 ID. Matthes, F.E. 423 Devils Postpile National Monument, California. Ice-truncated columns of basalt on Devils Postpile. Some of the facets are rounded and polished by ice. Figure 9, U.S. Geological Survey Professional Paper 329. #1:/Yosemite National Park/mfe00444 ID. Matthes, F.E. 444 Yosemite National Park, California. Compound recurved sand spit near the mouth of the Merced River at the head of Washburn Lake. Circa 1917. #1:/Yosemite National Park/mfe00445 ID. Matthes, F.E. 445 Yosemite National Park, California. Exfoliating mountainside on the south side of Washburn Lake. Circa 1917. #1:/Yosemite National Park/mfe00446 ID. Matthes, F.E. 446 Yosemite National Park, California. Across upper Merced Canyon, showing the hanging valley of Gray Peak Fork. Circa 1917. #1:/Yosemite National Park/mfe00447 ID. Matthes, F.E. 447 Yosemite National Park, California. Terrace and slope of massive granite in upper Merced Canyon, below Merced Lake. Circa 1917. #1:/Yosemite National Park/mfe00448 ID. Matthes, F.E. 448 Yosemite National Park, California. Crescentric gouges and parabolic tension cracks in the ice-scoured floor of massive granite above Merced Lake. Circa 1917. #1:/Matthes F.E. Collection-Yosemite National Park/mfe00460 ID. Matthes, F.E. 460 Oblique view from northeast of the Cockscomb. Yosemite National Park. Mariposa County, California. ca. 1917. #1:/Yosemite National Park/mfe00461 ID. Matthes, F.E. 461 Yosemite National Park, California. Cockscomb profile, showing its relation to the vertically sheeted structure of the granite. Circa 1917. #1:/Yosemite National Park/mfe00463 ID. Matthes, F.E. 463 Yosemite National Park, California. Tuolumne Pass and Fletcher Peak, viewed from the head of Rafferty Creek. Circa 1917. #1:/Yosemite National Park/mfe00465 ID. Matthes, F.E. 465 Yosemite National Park, California. Summit and plucked side of Lembert Dome. Cathedral Peak in the right background. Circa 1917. #1:/Yosemite National Park/mfe00467 ID. Matthes, F.E. 467 Yosemite National Park, California. Pothole Dome, a roche moutonn‚e of massive granite at the lower end of Tuolumne Meadows. The rock is characterized by many discontinuous, horizontal fractures which have somewhat promoted the reduction of the ridge by ice. Circa 1917. #1:/Yosemite National Park/mfe00473 ID. Matthes, F.E. 473 Yosemite National Park, California. East side of Tuolumne Peak, viewed from the east rim of Ten Lakes basin. Circa 1917. #1:/Yosemite National Park/mfe00474 ID. Matthes, F.E. 474 Yosemite National Park, California. Cirque lake at the head of the South Fork Cathedral Creek, viewed from the summit of Tuolumne Peak. In the distance is Mount Hoffman. A mass of metamorphic limestone is visible in the right half of the photograph. Circa 1917. #1:/Yosemite National Park/mfe00477 ID. Matthes, F.E. 477 Yosemite National Park, California. Remnants of glacier polish on a ledge at the side of Wawona Road. Circa 1918. #1:/Yosemite National Park/mfe00491 ID. Matthes, F.E. 491 Yosemite National Park, California. Upper Yosemite Fall. Circa 1918. #1:/Yosemite National Park/mfe00493 ID. Matthes, F.E. 493 Yosemite National Park, California. Lower part of Upper Yosemite Fall, descending into its basin. Circa 1918. See also photo mfe00494. #1:/Yosemite National Park/mfe00494 ID. Matthes, F.E. 494 Yosemite National Park, California. Upper Yosemite Fall basin in autumn when it is dry. Circa 1918. See also photo mfe00493. #1:/Yosemite National Park/mfe00496 ID. Matthes, F.E. 496 Yosemite National Park, California. Upper Yosemite Fall during drought conditions. Circa 1918. #1:/Yosemite National Park/mfe00499 ID. Matthes, F.E. 499 Yosemite National Park, California. Down the gorge below the Upper Yosemite Fall during drought conditions. Circa 1918. #1:/Yosemite National Park/mfe00501 ID. Matthes, F.E. 501 Yosemite National Park, California. Cave near Upper Yosemite Fall during drought conditions. Circa 1918. #1:/Yosemite National Park/mfe00505 ID. Matthes, F.E. 505 Yosemite National Park, California. People climbing the ladder on the northeast side of Half Dome from the saddle on that side. Circa 1918. #1:/Kings Canyon National Park/mfe00555 ID. Matthes, F.E. 555 Kings Canyon National Park, California. Southeast along Glacier Divide, showing marked asymmetry of the crest line resulting from more intense glaciation on the northerly slopes of this ridge. The northerly slopes bear a number of small glaciers, two of which appear in this view. 1921. Figure 22, U.S. Geological Survey Professional Paper 329. #1:/Kings Canyon National Park/mfe00556 ID. Matthes, F.E. 556 Kings Canyon National Park, California. Northwest along Glacier Divide showing moraine-like accumulations of debris at the foot of a small n‚v‚ patch. 1921. #1:/Kings Canyon National Park/mfe00557 ID. Matthes, F.E. 557 Kings Canyon National Park, California. South from the north shoulder of the trough of Evolution Creek: The Hermit on the left, Mount Goddard to the left of center, and the McGee group on the right. 1921. #1:/Kings Canyon National Park/mfe00558 ID. Matthes, F.E. 558 Kings Canyon National Park, California. Section of the High Sierra crest: the Mount McGee group of summits and the cirques at the head of McGee Creek, viewed from a point south of Evolution Valley. 1921. Figure 25, U.S. Geological Survey Professional Paper 329. #1:/Kings Canyon National Park/mfe00559 ID. Matthes, F.E. 559 Kings Canyon National Park, California. The McGee group, viewed from the mouth of a hanging cirque to the northeast. 1921. #1:/Kings Canyon National Park/mfe00560 ID. Matthes, F.E. 560 Kings Canyon National Park, California. Cirque northeast of Mount McGee, showing sap line, splintered cliff, bowl slope covered with debris, and lake in the bottom of the bowl. 1921. #1:/Kings Canyon National Park/mfe00561 ID. Matthes, F.E. 561 Kings Canyon National Park, California. The Hermit, viewed from a point directly west on the shoulder of the trough of McGee Creek. 1921. #1:/Kings Canyon National Park/mfe00562 ID. Matthes, F.E. 562 Kings Canyon National Park, California. The Hermit, viewed from the south shoulder of the trough of Evolution Creek. 1921. #1:/Kings Canyon National Park/mfe00563 ID. Matthes, F.E. 563 Kings Canyon National Park, California. Head of the trough of Evolution Creek and the bench of massive, exfoliating granite above. The trough itself is excavated in well-jointed granodiorite. In the foreground is Evolution Creek rushing over the rounded edge of the bench. 1921. Photos mfe00563 and mfe00564 form a panorama. #1:/Kings Canyon National Park/mfe00564 ID. Matthes, F.E. 564 Kings Canyon National Park, California. Head of the trough of Evolution Creek and the bench of massive, exfoliating granite above. The trough itself is excavated in well-jointed granodiorite. In the foreground is Evolution Creek rushing over the rounded edge of the bench. 1921. Photos mfe00563 and mfe00564 form a panorama. #1:/Kings Canyon National Park/mfe00565 ID. Matthes, F.E. 565 Kings Canyon National Park, California. South from a granite hill near the outlet of Evolution Lake, altitude 10,990 feet. At the left is the flank of the sharp-crested ridge bearing Mount Darwin and Mount Wallace (photos mfe00567 and mfe0568). The conical peak in the center is Mount Spencer. At the right is a glaciated ridge that separates Evolution Basin from the head of Evolution Valley below (photos mfe00565 and mfe00566). 1921. Figure 23, U.S. Geological Survey Professional Paper 329. Photos mfe00565, mfe00566, mfe00567, and mfe00568 form a panorama. #1:/Kings Canyon National Park/mfe00566 ID. Matthes, F.E. 566 Kings Canyon National Park, California. South from a granite hill near the outlet of Evolution Lake, altitude 10,990 feet. At the left is the flank of the sharp-crested ridge bearing Mount Darwin and Mount Wallace (photos mfe00567 and mfe0568). The conical peak in the center is Mount Spencer. At the right is a glaciated ridge that separates Evolution Basin from the head of Evolution Valley below (photos mfe00565 and mfe00566). 1921. Figure 23, U.S. Geological Survey Professional Paper 329. Photos mfe00565, mfe00566, mfe00567, and mfe00568 form a panorama. #1:/Kings Canyon National Park/mfe00567 ID. Matthes, F.E. 567 Kings Canyon National Park, California. South from a granite hill near the outlet of Evolution Lake (altitude 10,990 feet). At the left is the flank of the sharp-crested ridge bearing Mount Darwin and Mount Wallace (photos mfe00567 and mfe0568). The conical peak in the center is Mount Spencer. At the right is a glaciated ridge that separates Evolution Basin from the head of Evolution Valley below (photos mfe00565 and mfe00566). 1921. Figure 23, U.S. Geological Survey Professional Paper 329. Photos mfe00565, mfe00566, mfe00567, and mfe00568 form a panorama. #1:/Kings Canyon National Park/mfe00568 ID. Matthes, F.E. 568 Kings Canyon National Park, California. South from a granite hill near the outlet of Evolution Lake (altitude 10,990 feet). At the left is the flank of the sharp-crested ridge bearing Mount Darwin and Mount Wallace (photos mfe00567 and mfe0568). The conical peak in the center is Mount Spencer. At the right is a glaciated ridge that separates Evolution Basin from the head of Evolution Valley below (photos mfe00565 and mfe00566). 1921. Figure 23, U.S. Geological Survey Professional Paper 329. Photos mfe00565, mfe00566, mfe00567, and mfe00568 form a panorama. #1:/Kings Canyon National Park/mfe00569 ID. Matthes, F.E. 569 Kings Canyon National Park, California. Upper part of Evolution Lake, viewed from a rocky eminence that projects from its eastern shore. Mount Spencer on the left. Mount Huxley on the right. 1921. Photos mfe00569 and mfe00570 form a panorama. #1:/Kings Canyon National Park/mfe00571 ID. Matthes, F.E. 571 Kings Canyon National Park, California. From John Muir Trail in Evolution Basin: Mount Darwin on the left, Mount Wallace on the right. These two mountains have nearly level summits that are remnants of an ancient erosion surface. The level to which the ice rose in Evolution Basin is indicated by the upper limit of corrosion. Above this level the cliffs are deeply riven by frost and gullied by snow avalanches. 1921. Figure 27, U.S. Geological Survey Professional Paper 329. #1:/Kings Canyon National Park/mfe00572 ID. Matthes, F.E. 572 Kings Canyon National Park, California. Long crest that culminates in Mount Wallace and Mount Darwin, viewed from the shoulder on the south side of the trough of Evolution Creek, west of The Hermit. Freshly-fallen snow emphasizes the difference between the lower, ice-corroded part and the upper frost-riven part of the crest. 1921. #1:/Kings Canyon National Park/mfe00573 ID. Matthes, F.E. 573 Kings Canyon National Park, California. Ice-scoured rock floor of Evolution Basin near Sapphire Lake. In the lower right corner are two crescentric gouges. At left center are curved tension cracks in parallel, overlapping series. The ice came from the left. 1921. Figure 30, U.S. Geological Survey Professional Paper 329. #1:/Canyon National Park/mfe00574 ID. Matthes, F.E. 574 Kings Canyon National Park, California. Part of the ice-scoured rock floor of Evolution Basin near Sapphire Lake. A series of crescentric gouges; beyond, two series of curved tension cracks. To the right, some imperfect gouges. 1921. #1:/Kings Canyon National Park/mfe00575 ID. Matthes, F.E. 575 Kings Canyon National Park, California. Boulder pavement in the bed of Evolution Creek. Mount Wallace and Mount Darwin in the background. 1921. #1:/Kings Canyon National Park/mfe00576 ID. Matthes, F.E. 576 Kings Canyon National Park, California. Boulder pavement in the bed of Evolution Creek. The water flows between the boulders. 1921. #1:/Kings Canyon National Park/mfe00577 ID. Matthes, F.E. 577 Kings Canyon National Park, California. Glacial pavement in the bed of Evolution Creek. 1921. #1:/Yosemite National Park/mfe00633 ID. Matthes, F.E. 633 Yosemite National Park, California. Perched erratic on a low pedestal on the south slope of Illilouette Ridge. 1923. #1:/Yosemite National Park/mfe00641 ID. Matthes, F.E. 641 Yosemite National Park, California. New talus produced by a rockslide at the base of the Three Brothers. The trees in the foreground were defoliated by the air blast that accompanied the slide. 1923. #1:/Matthes F.E. Collection-Yosemite National Park/mfe00642 ID. Matthes, F.E. 642 Hetch Hetchy lake from observation pavilion. On the left is Tueeulala Falls, Wapama Falls center. Yosemite National Park. Tuolumne County, California. 1936. #1:/Yosemite National Park/mfe00644 ID. Matthes, F.E. 644 Yosemite National Park, California. Hetch Hetchy Dam, viewed from the railroad track on the mountain side. Circa 1923. #1:/Yosemite National Park/mfe00647 ID. Matthes, F.E. 647 Yosemite National Park, California. Up Yosemite Valley from the vicinity of Artist Point. El Capitan on the left. Cathedral Rocks and Bridalveil Fall on the right. Photo by J.T. Boysen, 1923. Plate 3, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/mfe00648 ID. Matthes, F.E. 648 Yosemite National Park, California. Tenaya Canyon, viewed from Glacier Point, is a typical U-shaped glacial canyon. At the right is Half Dome, and just beyond is the summit of Clouds Rest. At the left is Basket Dome, and above it in the far distance is Mount Hoffmann, white with snow. In the center, darkened by the shadow of a cloud, is Mount Watkins; and below it, at the mouth of the canyon, is Mirror Lake. Photo by A.C. Pillsbury, circa 1914. Plate 8-A, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/mfe00649 ID. Matthes, F.E. 649 Yosemite National Park, California. The prismatic form of Agassiz Column is determined wholly by intersecting planes, vertical and oblique. The column is the last remnant of a rock mass that was divided by many such fractures. The cliffs about Yosemite Falls, in the background, are comparatively massive. The rows of bushes accentuate the few horizontal and oblique master joints which determine the principal sculptural features. Photo by A.C. Pillsbury, circa 1914. Plate 47-B, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/mfe00650 ID. Matthes, F.E. 650 Yosemite National Park, California. Giant sequoias in Mariposa Grove. The sequoias stand in a grove surrounded by pine, firs, and cedars about half-way up on the western flank of the Sierra Nevada. Circa 1914. Plate 6-B, U.S. Geological Survey Professional Paper 160. #1:/Devils Postpile National Monument/mfe00652 ID. Matthes, F.E. 652 Devils Postpile National Monument, California. Devils Postpile, viewed from a basalt crag near the San Joaquin River. Photo by W.L. Huber, 1923. #1:/Devils Postpile National Monument/mfe00653 ID. Matthes, F.E. 653 Devils Postpile National Monument, California. Rhythmic flexures in the columnar structure give a chicken ladder effect to the main cliff. Photo by W.L. Huber, 1923. #1:/Sequoia National Park/mfe00656 ID. Matthes, F.E. 656 Sequoia National Park, California. Mountain meadow near Ranger Headquarters in Giant Forest. It remains uninvaded by sequoia, fir, or pine trees because of wetness. The area has remained unglaciated. Photo by L. Eddy, 1925. #1:/Sequoia National Park/mfe00657 ID. Matthes, F.E. 657 Sequoia National Park, California. Bases of a group of sequoias in Giant Forest. Photo by L. Eddy, 1925. #1:/Sequoia National Park/mfe00658 ID. Matthes, F.E. 658 Sequoia National Park, California. Moro Rock, an exfoliated monolith of granitic rock projecting from the southern rim of the upland-bearing Giant Forest. Photo by L. Eddy, 1925. #1:/Sequoia National Park/mfe00659 ID. Matthes, F.E. 659 Sequoia National Park, California. Moro Rock, viewed from the rim of the upland to the northwest. Photo by L. Eddy, 1925. #1:/Sequoia National Park/mfe00660 ID. Matthes, F.E. 660 Sequoia National Park, California. Southeast from the base of Moro Rock. Castle Rocks on the right. Great Western Divide on the left. Turtle Rock in the foreground. Photo by L. Eddy, 1925. #1:/Sequoia National Park/mfe00661 ID. Matthes, F.E. 661 Sequoia National Park, California. Northwest from a spur of tableland. Mount Silliman in the distance. Glacial troughs with lakes at the head of Kaweah River in the middle distance. Photo by L. Eddy, 1925. #1:/Sequoia National Park/mfe00662 ID. Matthes, F.E. 662 Sequoia National Park, California. Lower lake of the Twin Lakes near Silliman Crest. Twin Peaks composed of exfoliating granite in the background. Photo by L. Eddy, 1925. #1:/Sequoia National Park/mfe00678 ID. Matthes, F.E. 678 Sequoia National Park, California. Massive exfoliation in granite at Sunset Cliff. Man leans into a niche formed by solution. Note the rhythmically spaced solution cavities in the small rainwater channel. 1925. #1:/Sequoia National Park/mfe00679 ID. Matthes, F.E. 679 Sequoia National Park, California. Exfoliating granite near Ranger Headquarters in Giant Forest. 1925. #1:/Sequoia National Park/mfe00680 ID. Matthes, F.E. 680 Sequoia National Park, California. Ancient Indian pit, about 5 feet in diameter, resembling a stream-worn pothole in the surface of an exfoliating granite boss near Ranger Headquarters in Giant Forest. 1925. See also photo mfe00681. #1:/Sequoia National Park/mfe00681 ID. Matthes, F.E. 681 Sequoia National Park, California. A more perfect example of an Indian pit than photo mfe00680. The litter cleaned out of it contained a thin layer of rhyolitic ash and some charcoal near the bottom. 1925. #1:/Sequoia National Park/mfe00682 ID. Matthes, F.E. 682 Sequoia National Park, California. Unusually deep Indian pit near Redwood Meadow (cleaned out). Seated on the edge of the pit is Colonel George W. Stewart of Visalia, who has made a special study of these prehistoric cavities. 1925. #1:/Kings Canyon National Park/mfe00717 ID. Matthes, F.E. 717 Kings Canyon National Park, California. Sculpture of the south wall of Bubbs Creek canyon. The cleft has been eroded by an intermittent stream along a narrow zone of shearing in the granite. In the upper left is the path of a stream whose eroding action has not been favored by fractures. 1925. #1:/Kings Canyon National Park/mfe00720 ID. Matthes, F.E. 720 Kings Canyon National Park, California. Center Basin, viewed from the trail to Bullfrog Lake. East Vidette on the right. 1925. #1:/Kings Canyon National Park/mfe00721 ID. Matthes, F.E. 721 Kings Canyon National Park, California. Left to right: Center Basin, East Vidette, and West Vidette, viewed from the trail to Bullfrog Lake. 1925. Photos mfe00721 and mfe00722 form a panorama. #1:/Kings Canyon National Park/mfe00722 ID. Matthes, F.E. 722 Kings Canyon National Park, California. Left to right: Center Basin, East Vidette, and West Vidette, viewed from the trail to Bullfrog Lake. 1925. Photos mfe00721 and mfe00722 form a panorama. #1:/Kings Canyon National Park/mfe00723 ID. Matthes, F.E. 723 Kings Canyon National Park, California. Bullfrog Lake, looking toward its outlet. The base of Kearsarge Pinnacles on the extreme left, then East Vidette and Deerhorn Mountain. West Vidette in the center. Mount Brewer in the right background (photo mfe00724). 1925. Photos mfe00723 and mfe00724 form a panorama. #1:/Kings Canyon National Park/mfe00724 ID. Matthes, F.E. 724 Kings Canyon National Park, California. Bullfrog Lake, looking toward its outlet. The base of Kearsarge Pinnacles on the extreme left, then East Vidette and Deerhorn Mountain. West Vidette in the center. Mount Brewer in the right background (photo mfe00724). 1925. Photos mfe00723 and mfe00724 form a panorama. #1:/Kings Canyon National Park/mfe00725 ID. Matthes, F.E. 725 Kings Canyon National Park, California. Kearsarge Pinnacles and Kearsarge Lakes, viewed from a slope near Kearsarge Pass. 1925. #1:/Kings Canyon National Park/mfe00726 ID. Matthes, F.E. 726 Kings Canyon National Park, California. Main Kearsarge Lake with University Peak in the left background and Kearsarge Pinnacles on the right. 1925. #1:/Kings Canyon National Park/mfe00731 ID. Matthes, F.E. 731 Kings Canyon National Park, California. From the platform south of Fin Dome: part of Rae Lake with Dragon Peak on the left and Mount Rixford on the right. 1925. #1:/Kings Canyon National Park/mfe00734 ID. Matthes, F.E. 734 Kings Canyon National Park, California. Fin Dome, viewed from the base of Black Mountain. Lower end of Rae Lake in the middle distance. 1908. #1:/Kings Canyon National Park/mfe00735 ID. Matthes, F.E. 735 Kings Canyon National Park, California. Down Rae Lake, showing Fin Dome on the left (mfe00735). 1925. Photos mfe00735 and mfe00736 form a panorama. #1:/Kings Canyon National Park/mfe00736 ID. Matthes, F.E. 736 Kings Canyon National Park, California. Down Rae Lake, showing Fin Dome on the left (mfe00735). 1925. Photos mfe00735 and mfe00736 form a panorama. #1:/Kings Canyon National Park/mfe00737 ID. Matthes, F.E. 737 Kings Canyon National Park, California. Fin Dome, viewed from the west. 1925. #1:/Kings Canyon National Park/mfe00738 ID. Matthes, F.E. 738 Kings Canyon National Park, California. South end of Fin Dome, showing platy structure of granite. 1925. #1:/Kings Canyon National Park/mfe00739 ID. Matthes, F.E. 739 Kings Canyon National Park, California. Mt. Clarence King and Sixty Lake Basin, viewed from the platform south of Fin Dome. 1925. #1:/Kings Canyon National Park/mfe00740 ID. Matthes, F.E. 740 Kings Canyon National Park, California. Mount Bago and Mount Brewer group, viewed from Glen Pass. 1925. #1:/Sequoia National Park/mfe00741 ID. Matthes, F.E. 741 Sequoia National Park, California. East Lake with Mount Brewer, North Guard, and South Guard in the distance. Two glacial cirques with a tabular spur between. 1925. #1:/Kings Canyon National Park/mfe00742 ID. Matthes, F.E. 742 Kings Canyon National Park, California. Jagged blades and pinnacles of granite on the south side of Mount Bago. 1925. #1:/Sequoia National Park/mfe00743 ID. Matthes, F.E. 743 Sequoia National Park, California. Up East Lake with Mount Brewer group spurs on the right and Kings-Kern Divide in the distance. 1925. Photos mfe00743 and mfe00744 form a panorama. #1:/Sequoia National Park/mfe00744 ID. Matthes, F.E. 744 Sequoia National Park, California. Up East Lake with Mount Brewer group spurs on the right and Kings-Kern Divide in the distance. 1925. Photos mfe00743 and mfe00744 form a panorama. #1:/Sequoia National Park/mfe00745 ID. Matthes, F.E. 745 Sequoia National Park, California. Reflection Lake with Mount Jordan on the left and the Great Western Divide on the right. 1925. Photos mfe00745, mfe00746, and mfe00747 form a panorama. #1:/Yosemite National Park/mfe00755 ID. Matthes, F.E. 755 Yosemite National Park, California. Erratic boulder of Cathedral Peak Granite on basalt near Glen Aulin. Photo by J. Cole. #1:/Yosemite National Park/mfe00758 ID. Matthes, F.E. 758 Yosemite National Park, California. Subglacial pothole on Pothole Dome. Photo by J. Cole. #1:/Yosemite National Park/mfe00763 ID. Matthes, F.E. 763 Yosemite National Park, California. Vertical sheets of diorite split apart by intruding El Capitan Granite on the floor of Till Valley. #1:/Yosemite National Park/mfe00764 ID. Matthes, F.E. 764 Yosemite National Park, California. Lower Jack Main Canyon. Recent fissure traversing rocks in the foreground and the mountain in the background. 1936. #1:/Yosemite National Park/mfe00765 ID. Matthes, F.E. 765 Yosemite National Park, California. Tuolumne River at the foot of a slope of massive granite. Cathedral Peak, Cockscomb, and Echo Peaks in the background. August 1936. #1:/Yosemite National Park/mfe00767 ID. Matthes, F.E. 767 Yosemite National Park, California. Cliff of massive granite on the south bank of the Tuolumne River above Glen Aulin. August 1936. #1:/Yosemite National Park/mfe00769 ID. Matthes, F.E. 769 Yosemite National Park, California. Large erratics on the bench of Young Lakes. Spence Taylor by the boulder. August 1936. #1:/Yosemite National Park/mfe00772 ID. Matthes, F.E. 772 Yosemite National Park, California. Hetch Hetchy Lake, viewed from a point west of the trail to Tiltill Valley. September 1936. #1:/Yosemite National Park/mfe00774 ID. Matthes, F.E. 774 Yosemite National Park, California. Lower Young Lake and glaciated slope. 1923. #1:/Yosemite National Park/mfe00775 ID. Matthes, F.E. 775 Yosemite National Park, California. Upper Kerrick Canyon. August 1936. #1:/Yosemite National Park/mfe00776 ID. Matthes, F.E. 776 Yosemite National Park, California. Volunteer Peak, viewed from the pass. 1936. #1:/Yosemite National Park/mfe00777 ID. Matthes, F.E. 777 Yosemite National Park, California. Michie Peak, viewed from Haystack Peak. September 1936. #1:/Yosemite National Park/mfe00778 ID. Matthes, F.E. 778 Yosemite National Park, California. Lembert Dome. August 1936. #1:/Yosemite National Park/mfe00779 ID. Matthes, F.E. 779 Yosemite National Park, California. Cathedral Peak and Fairview Dome, viewed from lower Tuolumne Meadows. 1936. #1:/Yosemite National Park/mfe00780 ID. Matthes, F.E. 780 Yosemite National Park, California. Hetch Hetchy Lake, viewed from a point north of Tiltill Trail. September 14, 1936. #1:/Yosemite National Park/mfe00781 ID. Matthes, F.E. 781 Yosemite National Park, California. Cathedral Peak, Cockscomb, Echo Peaks, and Fairview Dome, viewed from the bank of the Tuolumne River, below Tuolumne. 1936. #1:/Yosemite National Park/mfe00782 ID. Matthes, F.E. 782 Yosemite National Park, California. Fairview Dome, viewed from lower Tuolumne Meadows. August 1936. #1:/Yosemite National Park/mfe00783 ID. Matthes, F.E. 783 Yosemite National Park, California. Hetch Hetchy Lake, viewed from Pinyon Point. September 14, 1936. #1:/Yosemite National Park/mfe00784 ID. Matthes, F.E. 784 Yosemite National Park, California. Ragged Peak. August 1936. #1:/Yosemite National Park/mfe00785 ID. Matthes, F.E. 785 Yosemite National Park, California. Mount Conness, viewed from Young Lakes. 1936. #1:/Yosemite National Park/mfe00787 ID. Matthes, F.E. 787 Yosemite National Park, California. Basalt plug near Glen Aulin. August 1936. #1:/Yosemite National Park/mfe00789 ID. Matthes, F.E. 789 Yosemite National Park, California. Erratic of El Capitan Granite (El Portal stage or older) resting on volcanic mudflow at the northeast end of Rancheria Mountain. September 21, 1936. #1:/Yosemite National Park/mfe00790 ID. Matthes, F.E. 790 Yosemite National Park, California. Saddle northeast of Rancheria Mountain, showing triangular prism of volcanic material filling ancient valley section. View is from the trail south of Pleasant Valley. September 16, 1936. #1:/Yosemite National Park/mfe00792 ID. Matthes, F.E. 792 Yosemite National Park, California. Kolana Rock and Hetch Hetchy Lake. September 14, 1936. #1:/Yosemite National Park/mfe00793 ID. Matthes, F.E. 793 Yosemite National Park, California. Top of a basalt mesa at the northeast end of Rancheria Mountain. Erratics of granite of Glacier Point(?) stage. Volunteer Peak in center background. September 21, 1936. #1:/Yosemite National Park/mfe00803 ID. Matthes, F.E. 803 Yosemite National Park, California. Glacial grooves starting in small hollows and showing unmistakably the ice direction (right to left). On a bench at the south base of Mercur Peak. August 2, 1937. #1:/Sequoia National Park/mfe00829 ID. Matthes, F.E. 829 Sequoia National Park, California. Alta Peak (11,211 feet). The summit is composed of frost-shattered remnants of exfoliation shells. Formerly the shells extended toward the left in a descending curve outlining a dome, but the excavation of a cirque by a small glacier has pared away the north side of the dome, thereby giving the summit the unsymmetrical profile. The upper part of the cirque wall, which is several hundred feet high, is visible in the lower left corner. Photo by J.C. Patten, 1935. Figure 30, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe00830 ID. Matthes, F.E. 830 Sequoia National Park, California. Alta Peak and Heather Lake, an example of a cirque tarn. Photo by J.C. Patten. #1:/Sequoia National Park/mfe00832 ID. Matthes, F.E. 832 Sequoia National Park, California. Junction of Crabtree Canyon (foreground) and Whitney Canyon (background). The sparsely jointed floor of Crabtree Canyon shows the effects of glacial quarrying. The intercanyon ridge in the middle distance has angular hackly forms produced by glacial quarrying in well-jointed granite. The Whitney Glacier spilled over the ridge and quarried its downstream side. The well-jointed canyon slopes in the background also exhibit the effects of glacial quarrying. 1935. Figure 47, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe00836 ID. Matthes, F.E. 836 Sequoia National Park, California. Up "River Valley," the glaciated upper canyon of Middle Fork Kaweah River. Cliffs in the foreground show exfoliation. 1936. Figure 33, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe00952 ID. Matthes, F.E. 952 Sequoia National Park, California. Cirques on Mount Needham. #1:/Devils Postpile National Monument/mfe00978 ID. Matthes, F.E. 978 Devils Postpile National Monument, California. Nearly horizontal columns at the south end of the San Joaquin Basin. 1938. #1:/Devils Postpile National Monument/mfe00980 ID. Matthes, F.E. 980 Devils Postpile National Monument, California. Down a trench cut by the middle fork of the San Joaquin River in columnar basalt. 1938. #1:/Devils Postpile National Monument/mfe00981 ID. Matthes, F.E. 981 Devils Postpile National Monument, California. Curved columns at the north front of the San Joaquin Basin. 1938. #1:/Yosemite National Park/mfe00985 ID. Matthes, F.E. 985 Yosemite National Park, California. Forsyth Peak, viewed from the west shore of Dorothy Lake. Shows effects of glacial erosion and postglacial frost weathering in irregularly structured granodiorite rock. July 31, 1937. #1:/Yosemite National Park/mfe00986 ID. Matthes, F.E. 986 Yosemite National Park, California. Hetch Hetchy Lake, viewed from the road to Miguel Meadow. 1936. #1:/Yosemite National Park/mfe00987 ID. Matthes, F.E. 987 Yosemite National Park, California. Hetch Hetchy region, viewed from the medial moraine on Rancheria Mountain. Miocene(?) upland on the left. Pliocene(?) erosion surface on the right. September 22, 1936. #1:/Yosemite National Park/mfe00988 ID. Matthes, F.E. 988 Yosemite National Park, California. Polished granite in the canyon of the Lyell Fork Merced River. Photo by N.C. Clark, 1931. #1:/Yosemite National Park/mfe00989 ID. Matthes, F.E. 989 Yosemite National Park, California. Mossy water course, polished granite in the canyon of the Lyell Fork Merced River. Photo by N.C. Clark, 1931. #1:/Yosemite National Park/mfe00990 ID. Matthes, F.E. 990 Yosemite National Park, California. Forsyth Peak, viewed from a knob east of Dorothy Lake. 1937. #1:/Yosemite National Park/mfe00991 ID. Matthes, F.E. 991 Yosemite National Park, California. Diving Board and face of Half Dome. Photo by D. Brower, August 12, 1937. #1:/Yosemite National Park/mfe00992 ID. Matthes, F.E. 992 Yosemite National Park, California. Diving Board and Half Dome. Morgan Harris, chairman of the Sierra Club Rock Climbing Committee. Photo by D. Brower, August 12, 1937. #1:/Yosemite National Park/mfe00994 ID. Matthes, F.E. 994 Yosemite National Park, California. Yosemite Valley, viewed from the Diving Board. Morgan Harris, chairman of the Sierra Club Rock Climbing Committee, silhouetted on the brink. Photo by D. Brower, August 12, 1937. #1:/Kings Canyon National Park/mfe01011 ID. Matthes, F.E. 1011 Kings Canyon National Park, California. Monument on the summit of Muir Pass. Part of Mount Goode on the left. #1:/Kings Canyon National Park/mfe01016 ID. Matthes, F.E. 1016 Kings Canyon National Park, California. Burro pack train passing Wanda Lake near Muir Pass. 1927. #1:/Yosemite National Park/mfe01028 ID. Matthes, F.E. 1028 Yosemite National Park, California. From Sentinel Dome, covering from east of Half Dome to southwest of El Capitan. Photo by L. Moe. Photos mfe01028, mfe01029, and mfe01030 form a panorama. #1:/Yosemite National Park/mfe01029 ID. Matthes, F.E. 1029 Yosemite National Park, California. From Sentinel Dome, covering from east of Half Dome to southwest of El Capitan. Photo by L. Moe. Photos mfe01028, mfe01029, and mfe01030 form a panorama. #1:/Yosemite National Park/mfe01030 ID. Matthes, F.E. 1030 Yosemite National Park, California. From Sentinel Dome, covering from east of Half Dome to southwest of El Capitan. Photo by L. Moe. Photos mfe01028, mfe01029, and mfe01030 form a panorama. #1:/Sequoia National Park/mfe01040 ID. Matthes, F.E. 1040 Sequoia National Park, California. East toward the headwaters of Middle Fork Kaweah River. The snow-clad peaks on the skyline are on the Great Western Divide. In the left foreground is Moro Rock, an imperfect dome that owes its rounded form to long-continued exfoliation of the massive granite. At the lower right is the canyon of the Middle Fork. Photo by F. Webb. Figure 4, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe01041 ID. Matthes, F.E. 1041 Sequoia National Park, California. Broad west slope of the Sierra Nevada, viewed from Alta Peak. The Kaweah River canyon (left of center) is one of the many deep trenches cut by the southwest-flowing rivers. The foothills are 27 miles away. Beyond them is the level San Joaquin Valley, deeply filled with silt, sand, and gravel washed down from the bordering ranges. On the horizon, barely discernible because of the haze, are the Coast Ranges, more than 100 miles distant. Photo by L. Moe. Figure 5, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe01042 ID. Matthes, F.E. 1042 Sequoia National Park, California. West from Moro Rock along the cliffs bordering the platform on which the Giant Forest stands. Part of the Giant Forest is seen at the right. The cliffs are of sparsely jointed granite that is exfoliating very slowly and rather irregularly. Similar massive granite outcrops elsewhere on the platform indicate that the whole platform is made up largely of this durable material. It is, no doubt, to this circumstance that the platform, a remnant of an ancient erosion surface, owes its preservation. Circa 1935. Figure 7, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe01043 ID. Matthes, F.E. 1043 Sequoia National Park, California. West across Kern Canyon to the Chagoopa Plateau. Kaweah Peaks ridge in the background. The timbered plateau on both sides of the canyon is a remnant of an erosion surface; that forming the Chagoopa Plateau is particularly striking. In the foreground, at the lower right, is a small hanging valley. Circa 1935. Figure 9, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe01044 ID. Matthes, F.E. 1044 Sequoia National Park, California. Northwest from the main Sierra crest across the upper Kern Basin to the Great Western Divide. An ancient erosion surface is preserved on the summits of Mount Whitney (foreground) and Mount Young, the adjacent peak. Other, younger erosion surfaces form the plateaus bordering the Kern Canyon. Numerous cirques scallop the main Sierra crest and the Great Western Divide. Photo by R. Curtis. Figure 10, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe01045 ID. Matthes, F.E. 1045 Sequoia National Park, California. Southeast toward cirques on the Great Western Divide, which forms part of the boundary between Sequoia National Park and Kings Canyon National Park. Table Mountain, the flat-topped peak to the right of center, is one of the dominating summits of the divide. Photo by F. Webb. Figure 11, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe01046 ID. Matthes, F.E. 1046 Sequoia National Park, California. One of the many lakelets occupying glacially quarried rock basins in the upper Kern Basin, above the junction of Milestone Creek. The granite at the sides, being only sparsely fractured, was not readily quarried away and consequently shows the effects of abrasion. Circa 1935. Figure 13, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe01047 ID. Matthes, F.E. 1047 Sequoia National Park, California. Northwest from Mount Guyot. Kern Canyon extends from the center toward the lower left; three branch canyons unite at its head. Photo by C.F.J. Overhage. Figure 14, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe01048 ID. Matthes, F.E. 1048 Sequoia National Park, California. South down Kern Canyon from a point on the west rim near the mouth of Rattlesnake Creek. The pronounced U-shaped form of the canyon has developed by glacial erosion from a narrow V-shaped trench. The walls, once smooth, are now furrowed by gullies; talus slopes at their base produce the curves of a new U-shaped form superimposed on the glacially eroded one. Photo by L. Moe. Figure 15, U.S. Geological Survey Professional Paper 504-A. #1:/Yosemite National Park/mfe0104a ID. Matthes, F.E. 104a Yosemite National Park, California. Crest of morainal embankment on the side of Moraine Dome. This morainal embankment marks the highest level attained by the Merced Glacier during the last or Wisconsin stage of glaciation. Circa 1914. Plate 30-A, U.S. Geological Survey Professional Paper 160. #1:/Sequoia National Park/mfe01050 ID. Matthes, F.E. 1050 Sequoia National Park, California. One of the timbered moraines of the Wisconsin Stage that surround Moraine Lake. The meadow, which is below Moraine Lake, occupies a strip of level swampy land formed by the gradual filling of a lakelet that lay between the moraine in view and the next one to the right. Granite sand continues to be washed down from the flanking moraines, but the meadow is still too wet for growth of lodgepole pines. A few seedlings are beginning to invade it. Circa 1935. Figure 20, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe01051 ID. Matthes, F.E. 1051 Sequoia National Park, California. Frost-split block of granite on one of the moraines that encircle Moraine Lake. Measurement of the pieces shows that originally the block was 23 feet long. It has fallen apart as a result of the force exerted by water freezing in incipient joints. Circa 1935. Figure 21, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe01052 ID. Matthes, F.E. 1052 Sequoia National Park, California. Glacier polish, striae, and grooves above the head of Kern Canyon. The rock is aplite, which weathers more slowly than the coarser granite and, therefore, holds its glacial markings longer. Since being glaciated, the aplite has been somewhat disrupted into angular blocks by repeated frost action. Circa 1935. Figure 23, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe01053 ID. Matthes, F.E. 1053 Sequoia National Park, California. Fantastic rock forms in the upper Kern Basin, near Lake South America. The forms were produced by glacial quarrying of joint blocks followed by abrasion and rounding of the resultant angular forms. The direction of ice movement was diagonally toward the right and away from the camera. Many blocks that were firmly attached when the glacier passed over them have since been split or loosened by postglacial frost action. Circa 1935. Figure 24, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe01054 ID. Matthes, F.E. 1054 Sequoia National Park, California. Across the glaciated floor of Whitney Canyon, showing combined effects of quarrying and grinding. The glacier moved from left to right, approximately parallel to a set of vertical joints in the granite. Horizontal joints enabled the glacier to quarry out long slabs, but this quarrying proceeded slowly because of the scarcity of vertical cross joints. As a consequence, the glacier could grind and round off many of the slabs before tearing them out. Circa 1935. Figure 25, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe01055 ID. Matthes, F.E. 1055 Sequoia National Park, California. Glacial boulder of El Portal Stage resting on a platform overlooking the Big Arroyo. Weathering has produced a bread crust effect on the sides and weather pits 6 to 15 inches deep on the top surface. Circa 1935. Figure 27, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe01056 ID. Matthes, F.E. 1056 Sequoia National Park, California. Glaciated knob at the head of South Fork Kaweah River. This knob was overridden by the earlier glaciers but not by those of the Wisconsin Stage, as is evident from the relative position of the older and younger moraines nearby. During the long period since it was glaciated, the knob weathered into jagged forms. Infiltration of water doubtless has been facilitated by the high angle of the jointed fractures and, as a consequence, disruption by frost has been particularly vigorous. Circa 1935. Figure 28, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe01057 ID. Matthes, F.E. 1057 Sequoia National Park, California. Saddle east of Tower Rock, on the east rim of Kern Canyon. This saddle was invaded by the Kern glacier of El Portal Stage. The crags and boulders, which are 10 to 20 feet high, give evidence of the post-El Portal weathering that here has destroyed all traces of glaciation. Circa 1935. Figure 29, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe01058 ID. Matthes, F.E. 1058 Sequoia National Park, California. Outwash material of the El Portal Stage, revealed in a road cut on the Generals Highway about half a mile above Ash Mountain Headquarters. Circa 1935. Figure 31, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe01059 ID. Matthes, F.E. 1059 Sequoia National Park, California. Glacial outwash, dating perhaps from the Glacier Point Stage, exposed in a road cut on the Generals Highway above Camp Potwisha. This material was brought down by the Kaweah River from the glacier at its head and now forms an inconspicuous terrace on the side of the canyon, about 200 feet above the riverbed. Photo by J.C. Patten, circa 1935. Figure 32, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe01060 ID. Matthes, F.E. 1060 Sequoia National Park, California. The largest and most perfectly formed avalanche chute in the park, viewed from the High Sierra Trail east of the camp in Bearpaw Meadow. Like its smaller companion, this chute is carved in massive exfoliating granite and terminates at the brink of the glacial U-shaped canyon below. The downward narrowing of the chute is explained by the protection given to the lower part of the chute by a snow cone on the surface of the glacier which lays in the canyon. Circa 1935. Frontispiece, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe01061 ID. Matthes, F.E. 1061 Sequoia National Park, California. Down the canyon across one of the Hamilton Lakes, viewed from near the source of Hamilton Creek. Massive granite forms the impressive cliffs on the right and the rock barrier across which the lake has its outlet. In the center, on the distant mountain, is a well-formed avalanche chute. Photo by W.L. Huber, circa 1935. Figure 35, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe01062 ID. Matthes, F.E. 1062 Sequoia National Park, California. Kern River, cutting in bedrock, near Kern Canyon Ranger Station at the south border of the park. Circa 1935. Figure 37, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe01063 ID. Matthes, F.E. 1063 Sequoia National Park, California. From the vicinity of the Nine Lake Basin southward down Big Arroyo, which in the distance (left) becomes a deep U-shaped canyon flanked by forested plateaus. Pack train moving toward photographer. Photo by W.L. Huber, circa 1935. Figure 38, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe01064 ID. Matthes, F.E. 1064 Sequoia National Park, California. Across Big Arroyo from an unnamed mountain east of Little Claire Lake. Big Arroyo, like Kern Canyon, is a stream-cut canyon modified by glacial action. The broad peak to the right of center is Mount Kaweah. On the far side of Big Arroyo is part of the Chagoopa Plateau. Circa 1935. Figure 39, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe01065 ID. Matthes, F.E. 1065 Sequoia National Park, California. Chagoopa Plateau and Moraine Lake, viewed from the edge of Big Arroyo. The plateau and timbered benches on the far side of Big Arroyo are remnants of an erosion surface left after trenching of the canyon. Circa 1935. Figure 40, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe01066 ID. Matthes, F.E. 1066 Sequoia National Park, California. Moraine Lake, on the Chagoopa Plateau, one of the few wholly moraine-enclosed lakes in the Kern Basin. The water seeps out through a morainal embankment at the lower end of the lake. Photo by W.L. Huber, circa 1935. Figure 41, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe01067 ID. Matthes, F.E. 1067 Sequoia National Park, California. Up the valley of Tyndall Creek from the Bighorn Plateau, which appears in the lower right foreground. The flat-topped peak in the right center is Diamond Mesa. The barren ridges of rock debris extending toward the lower left corner are lateral moraines of the Wisconsin Stage. The uppermost moraine marks the highest level reached by the Tyndall Glacier during that stage. The lower, timber-covered moraines were laid down during the recession of the glacier. The smooth slope of the Bighorn Plateau seems devoid of glacial features, yet in places it bears scattered erratic boulders left from El Portal Stage. Circa 1935. Figure 42, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe01068 ID. Matthes, F.E. 1068 Sequoia National Park, California. Northeast up the valley of Wright Creek toward Mount Tyndall (central peak with gullied slopes). Stretching across the valley floor are two moraines that mark brief halts in the recession of Wright Glacier. In the canyon to the right of Mount Tyndall, the level at which the surface of the glacier lay is clearly defined by the lower limit of the gullies cut in the cliff. These gullies are due to avalanche erosion. Circa 1935. Figure 43, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe01069 ID. Matthes, F.E. 1069 Sequoia National Park, California. Tulainyo Lake, high on the main crest of the Sierra Nevada, viewed from the west. Owens Valley in the distance. Photo by F. Webb. Figure 44, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe01070 ID. Matthes, F.E. 1070 Sequoia National Park, California. Gorge 50 feet deep cut by Wallace Creek, for the most part, in postglacial time. Stream erosion here has been facilitated by the numerous intersecting joints. Circa 1935. Figure 45, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe01071 ID. Matthes, F.E. 1071 Sequoia National Park, California. Mount Whitney, viewed from the west. The precipitous cliffs of the mountain, the scoured bedrock floor of the canyon, and the small lake in the foreground are typical features of the glaciated upper Kern Basin. The cliffs are furrowed by avalanche chutes. Photo by W.L. Huber. Figure 46, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe01073 ID. Matthes, F.E. 1073 Sequoia National Park, California. North side of Mount Hitchcock, viewed across Whitney Canyon. An unusually fine series of parallel avalanche chutes is shown here. These chutes have been formed across a system of vertical joint fractures in the granite; their positions are not determined by master joints extending parallel to their axes. The chutes all terminate at the upper limit of glacial action, below which the canyon wall is straight, although it is hackled in detail by glacial sculpturing. Circa 1935. Figure 49, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe01074 ID. Matthes, F.E. 1074 Sequoia National Park, California. East face of Mount Hitchcock. The entire mountain has a vertically sheeted structure, and infiltration of water and consequent frost action are facilitated along the weaker zones. There the rock is split into thin plates and slivers; the fragments loosened by frost are then swept down by avalanches. These chutes stand in marked contrast to those shown in photo mfe01060, which are not controlled by fractures but are worn in massive granite. Circa 1935. Figure 50, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe01075 ID. Matthes, F.E. 1075 Sequoia National Park, California. East across Kern Canyon in the vicinity of the Kern Canyon Ranger Station. The light-colored spur on the left is granite; the gray tongue-like mass on the right is a lava flow of basalt that cascaded down from the valley of Golden Trout Creek. At the near edge of the lava flow, Golden Trout Creek has incised a deep slot-like gorge in the basalt and in the granite underneath. At the upper left is a rocky promontory; in the saddle behind it, 1,500 to 1,600 feet above the floor of Kern Canyon, occurs a moraine of El Portal Stage. Circa 1935. Figure 51, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe01076 ID. Matthes, F.E. 1076 Sequoia National Park, California. Sand Meadows. These meadows and the neighboring Hockett Meadows are on a glaciated platform at an altitude of 8,500 to 9,000 feet in the Kaweah Basin. On the left, in front of the trees, are the so-called sand dunes, in reality, an outwash deposit. In the foreground, the meadow is strewn with glacial boulders. Circa 1935. Figure 36, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe01077 ID. Matthes, F.E. 1077 Sequoia National Park, California. Mount Hitchcock (center), viewed from the Whitney Trail across upper Whitney Canyon and Hitchcock Lake (foreground). Zones of fracturing in the floor of the canyon have controlled the erosive action of the glacier. Lakes and snowdrifts mark the depressions quarried out in these zones. The intermediate humps, composed of sparsely fractured rock, have been subject chiefly to the slower process of grinding. Except for the accumulation of rock debris at the base of Mount Hitchcock, this part of the canyon has undergone only insignificant changes since the disappearance of the glacier. Photo by K. Flewelling. Figure 48, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe01079 ID. Matthes, F.E. 1079 Sequoia National Park, California. Up the unglaciated lower part of Kaweah River canyon toward the platform on which the Giant Forest stands. Moro Rock (right) owes its prominence in the landscape to the fact that it is composed of massive granite. The platform is also held up mainly by massive granite, but the mountain slopes below have been eroded from normally jointed rocks, partly granitic, partly metamorphic. Circa 1935. Figure 6, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe01080 ID. Matthes, F.E. 1080 Sequoia National Park, California. South down the Kern Canyon from a point below the rim north of Wallace Creek. The canyon is not straight throughout, although its course is probably determined by a fault or by several closely spaced parallel faults. Photo by K. Flewelling. Figure 16, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe01081 ID. Matthes, F.E. 1081 Sequoia National Park, California. Disrupted glacial boulder in Wallace Canyon. When intact, the boulder measured 8 feet wide and 5 feet high and, doubtless, was in one piece when deposited by the glacier toward the end of the Wisconsin Stage. Opening of the originally tight joints in the granite by the freezing of infiltrated water has resolved the boulder into a series of parallel slabs. Circa 1935. Figure 22, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe01082 ID. Matthes, F.E. 1082 Sequoia National Park, California. On the moraine above Wright Creek, a glacial boulder split by frost into 26 pieces. Circa 1935. #1:/Sequoia National Park/mfe01083 ID. Matthes, F.E. 1083 Sequoia National Park, California. Hamilton Lakes and the large cirque-like hollow in which they are situated. This hollow is not a cirque in the strict sense. The basin of these lakes marks the confluence of three glaciers that issued from cirques lying 1,700 to 2,000 feet higher. The three converging glaciers, descending from the 1,700-foot cliffs, excavated the basin of Hamilton Lakes in what is really a canyon step. The streamlet cascading down the cliffs comes from the middle one of the three cirques which contains Upper Hamilton Lake. Circa 1935. #1:/Sequoia National Park/mfe01084 ID. Matthes, F.E. 1084 Sequoia National Park, California. Fantastic glacial sculpture in massive exfoliating granite on the south side of Hamilton Lakes canyon. Circa 1935. #1:/Sequoia National Park/mfe01085 ID. Matthes, F.E. 1085 Sequoia National Park, California. Sheer cliffs 2,000 to 2,400 feet high, north of Hamilton Lake (just out of view). At the lower right is a stretch of the trail leading to Kaweah Gap. The cliffs owe their remarkable columnar forms mainly to a vertically sheeted structure, which has permitted the incision of sharp gullies along narrow zones of intense fracturing. The erosional work has been done by avalanches of snow and by water from rain and snow carrying loosened rock grains. The white cliff on the right is composed of wholly undivided massive granite. #1:/Sequoia National Park/mfe01087 ID. Matthes, F.E. 1087 Sequoia National Park, California. Domes and pinnacles surrounding Hamilton Lake, viewed from the ridge above Redwood Meadow. 1935 #1:/Sequoia National Park/mfe01088 ID. Matthes, F.E. 1088 Sequoia National Park, California. Rock barrier at the lower end of Hamilton Lake. The barrier consists of essentially unfractured, massive granite which the glacier could not quarry away block by block, but could only grind and polish. The outlet stream of the lake glides over the smooth surface. In the foreground, the light-colored granite is mottled by dark patches of altered (metamorphosed) nongranitic rock. These metamorphic rocks were torn from the walls of the subterranean chamber in which the fused granite (magma) welled up. The chunks (inclusions) of metamorphic rock are intimately welded to the granite, and the composite mass is therefore devoid of fractures. Circa 1935. #1:/Sequoia National Park/mfe01089 ID. Matthes, F.E. 1089 Sequoia National Park, California. Glacial cirque in massive, exfoliating granite southwest of Hamilton Lake. 1936. #1:/Sequoia National Park/mfe01090 ID. Matthes, F.E. 1090 Sequoia National Park, California. Glacial sculpture in massive, exfoliating granite southwest of Hamilton Lake. 1936. #1:/Sequoia National Park/mfe01091 ID. Matthes, F.E. 1091 Sequoia National Park, California. Valley of Tyndall Creek, showing upper limit of glaciation and the ice line on the long spur of Mount Tyndall. 1935. #1:/Sequoia National Park/mfe01092 ID. Matthes, F.E. 1092 Sequoia National Park, California. Side of Diamond Mesa, viewed from the west. Though reduced in area by glacial erosion, the mesa itself has remained unglaciated, like the Boreal Plateau, because snow has never accumulated to sufficient depth on its wind-swept surface. The summit of Junction Peak stands high above the mesa and bears a vestige of a still higher erosion surface, presumably the Cirque Peak surface. 1935. #1:/Sequoia National Park/mfe01096 ID. Matthes, F.E. 1096 Sequoia National Park, California. Black Kaweah and Red Kaweah, viewed from one of the Little Five Lakes. Circa 1935. #1:/Sequoia National Park/mfe01098 ID. Matthes, F.E. 1098 Sequoia National Park, California. Summit of Mount Whitney. Circa 1935. #1:/Sequoia National Park/mfe01099 ID. Matthes, F.E. 1099 Sequoia National Park, California. Snow chutes on the side of Crabtree Canyon. Circa 1935. #1:/Sequoia National Park/mfe01100 ID. Matthes, F.E. 1100 Sequoia National Park, California. Basalt columns at the front of a lava cascade near Golden Trout Creek. 1936. #1:/Matthes F.E. Collection/mfe01101 ID. Matthes, F.E. 1101 A "perched erratic" boulder, left by the ice of the El Portal glaciation, near the head of Little Cottonwood Creek, four miles east of Army Pass. The pedestal is composed of coarse porphyritic granite, the local country rock, and stands 10 inches high. It has been protected from the weather by boulder of durable aplite. The surrounding floor of granite, being unprotected, has been stripped granule by granule to a depth of 10 inches. Pedestals of this sort are as a rule not long-lived and the one shown here probably affords but a partial measure of the total stripping of the rock floor since the second glaciation. Evidence found elsewhere in the High Sierra shows that under similar circumstances the total stripping may amount to 10 feet. Valley of Little Cottonwood Creek, southeast of park boundary. Inyo County, California. 1935. #1:/Sequoia National Park/mfe01103 ID. Matthes, F.E. 1103 Sequoia National Park, California. Moraine Lake, on Chagoopa Plateau, at sunrise. This is one of the few wholly moraine-impounded lakes in the Kern Basin. The little valley which the lake occupies was invaded by a side lobe of the Big Arroyo Glacier in the latest glacial stage. The lobe built several concentric moraine loops during the halts or re-advances that interrupted its recession. The last and smallest of these moraine loops encircles the lower end of the lake. The water seeps out through the morainal embankment. Circa 1935. #1:/Sequoia National Park/mfe01105 ID. Matthes, F.E. 1105 Sequoia National Park, California. Glacial polish, striae, and grooves in Upper Kern Canyon above Milestone Creek. The direction of ice movement was diagonally toward the right and away from the camera. The rock is aplite, a fine grained granitic rock filling ancient fissures in the granite, the prevailing country rock. It weathers more slowly than the coarser granite and therefore holds its glacial markings longer. Since being glaciated, the aplite has been disrupted into angular blocks by repeated frost action. Circa 1935. #1:/Sequoia National Park/mfe01106 ID. Matthes, F.E. 1106 Sequoia National Park, California. Boulder of porphyritic granite in upper Kern Basin. 1935. #1:/Sequoia National Park/mfe01108 ID. Matthes, F.E. 1108 Sequoia National Park, California. Landslide on the east side of Kern Canyon. 1935. #1:/Sequoia National Park/mfe01109 ID. Matthes, F.E. 1109 Sequoia National Park, California. Glacial pond and timberline vegetation in upper Kern Basin. 1935. #1:/Sequoia National Park/mfe01111 ID. Matthes, F.E. 1111 Sequoia National Park, California. Mount Ericson and Mount Stanford at the head of Kern Basin. Circa 1935. #1:/Sequoia National Park/mfe01112 ID. Matthes, F.E. 1112 Sequoia National Park, California. Southwest across upper Kern Basin. Milestone Mountain and Table Mountain in the distance. 1935. #1:/Sequoia National Park/mfe01113 ID. Matthes, F.E. 1113 Sequoia National Park, California. South slopes of Alta Peak. The mountain side, composed of massive granite, is exfoliating on a large scale. In the foreground, old exfoliation shells, long detached, are breaking up into angular blocks as a result of frost action in incipient joints. Circa 1935. #1:/Sequoia National Park/mfe01114 ID. Matthes, F.E. 1114 Sequoia National Park, California. Buckeye in bloom near Ash Mountain Civilian Conservation Corps Camp. 1935. #1:/Sequoia National Park/mfe01122 ID. Matthes, F.E. 1122 Sequoia National Park, California. The so-called sand dune in Sand Meadows. A real dune, heaped up by the wind, is composed wholly of fine sand; but this mound contains coarse stream-worn gravel and glaciated cobbles up to 9 inches in diameter. The mound is undoubtedly a stream deposit dating from the closing stages of the Ice Age. The meadow then still lay under a shallow ice sheet, and a stream of meltwater probably deposited the gravel and sand in an embayment in the eastern margin of the ice mass. When the ice melted, the deposit was left without supporting walls, and under the influence of gravity and rainwash it gradually assumed its present oval form. 1935. #1:/Sequoia National Park/mfe01127 ID. Matthes, F.E. 1127 Sequoia National Park, California. Snow chutes on the north side of Mount Hitchcock. 1935. #1:/Sequoia National Park/mfe01128 ID. Matthes, F.E. 1128 Sequoia National Park, California. Whitney Meadow, viewed from the trail to Cottonwood Pass. 1935. #1:/Sequoia National Park/mfe01129 ID. Matthes, F.E. 1129 Sequoia National Park, California. Branching avalanche chutes on the west flank of Mount Whitney. Some of the chutes are more than 100 feet deep. Their cutting has been facilitated by the thoroughly jointed structure of the granite. In some places, they are controlled by vertical master joints, but elsewhere they cross these fractures at various angles. Exposure to the afternoon sun has promoted melting of snow in these chutes, and running water has, therefore, played a more important part in modifying their form than it has on the shady north face of Mount Hitchcock. 1935. #1:/Sequoia National Park/mfe01135 ID. Matthes, F.E. 1135 Sequoia National Park, California. House on Mount Whitney. Frost-loosened and frost-heaved rock slabs, blocks, and fragments on the nivated summit. Across this gently inclined, but exceedingly rough platform, horses and mules can travel only on specially cleared trails. No stream-cut ravines, gullies, or even rills diversify the monotonous expanse, for the snow never yields enough water to create eroding streamlets. The rock is mostly aplite, which fills ancient fissures in the coarse porphyritic granite (strictly a quartz monzonite) constituting the prevailing country rock over large areas. Circa 1935. #1:/Sequoia National Park/mfe01137 ID. Matthes, F.E. 1137 Sequoia National Park, California. Solution cavities in granite at Sunset Rock. Photo by F. Been, circa 1935. #1:/Sequoia National Park/mfe01139 ID. Matthes, F.E. 1139 Sequoia National Park, California. Imperfect avalanche chutes on the south face of Mount Stanford. Irregularities in the structure of the granite have prevented the development of clean-cut parallel chutes. These imperfectly formed chutes predominate in high mountainous regions. Circa 1935. #1:/Sequoia National Park/mfe01142 ID. Matthes, F.E. 1142 Sequoia National Park, California. Disrupted aplite on the nivated summit of Mount Whitney. The detachment of these scales and individual rock grains gives the rock, as it weathers, a scalloped surface characterized by small concave hollows and intermediate sharp ridges. The exact nature of this weathering process is not fully understood, but it is doubtless primarily mechanical and not chemical, for the rock shows no sign of decomposition. 1935. #1:/Sequoia National Park/mfe01148 ID. Matthes, F.E. 1148 Sequoia National Park, California. Valhalla, viewed from Hesitation Point. Mount Stewart on the left. Circa 1935. #1:/Sequoia National Park/mfe01151 ID. Matthes, F.E. 1151 Sequoia National Park, California. Northeast from Boreal Plateau, overlooking the Siberian Outpost. In the distance is Mount LeConte. The nameless peak on the extreme left and Cirque Peak bear remnants of the Old Cirque Peak erosion surface. Mount Langley bears a large remnant of the still more ancient Whitney erosion surface. The vale with the pond (foreground) has been slightly modified by glacial action. Circa 1935. #1:/Sequoia National Park/mfe01153 ID. Matthes, F.E. 1153 Sequoia National Park, California. Northern edge of the Siberian Outpost. The frost-split blocks of granite might readily be mistaken for glacial boulders, but, having the same composition as the underlying bedrock, they have obviously been formed in place. The granite here is sparsely jointed and breaks up into large blocks. These, in turn, are subject to granular disintegration which at this lower altitude is probably effected not only by frost action, but also by the solvent action of carbon dioxide. The latter, derived from decaying lichens and pine needles, is carried by water into the interstices between individual granules. Eventually the blocks lose their sharp angles and become rounded. 1935. #1:/Sequoia National Park/mfe01154 ID. Matthes, F.E. 1154 Sequoia National Park, California. Sawtooth Peak, viewed from a point below Mineral King. 1936. #1:/Sequoia National Park/mfe01158 ID. Matthes, F.E. 1158 Sequoia National Park, California. Snow chutes on the southeast side of River Valley from the trail above Bearpaw Camp. Circa 1935. #1:/Matthes F.E. Collection-Yosemite National Park/mfe0115a ID. Matthes, F.E. 115a Cascade Cliffs and Little Yosemite valley. In few other places in the Yosemite region is the granite more continuously massive than in the Cascade Cliffs. Only one horizontal master joint divides the rock (in the lower left) The scales on the cliffs are merely surficial features due to exfoliation. The dark streaks indicate the paths followed by the ribbon cascades which descend from the upland in the spring, when the snow is melting, and from which the cliffs take their name. In the background is Sugar Loaf (Bunnell Point). Yosemite National Park. Mariposa County, California. ca. 1914. Published as plate 45-A, in U.S. Geological Survey. Professional paper 160. 1930. #1:/Sequoia National Park/mfe01162 ID. Matthes, F.E. 1162 Sequoia National Park, California. Glacial boulder split by frost action, on a lateral moraine of Wisconsin stage, from Rock Creek Glacier on the north edge of Siberian Outpost. Circa 1935. #1:/Sequoia National Park/mfe01164 ID. Matthes, F.E. 1164 Sequoia National Park, California. South across the valleys of Wright Creek and Wallace Creek to Mount Whitney, Mount Hale, and Mount Young (left to right). At the extreme left are cliffs with avalanche chutes that are only fairly well-developed. On Mount Hale and on the cliff nearer by are unusually deep chutes. On the slopes of Mount Young are well-developed chutes which converge in a small glacial cirque. Across the foreground extends a bouldery lateral moraine left by Wright Glacier. Circa 1935. #1:/Sequoia National Park/mfe01168 ID. Matthes, F.E. 1168 Sequoia National Park, California. Small asymmetric dome of exfoliation on the side of Bearpaw Dome. Great Western Divide in the background. 1936. #1:/Sequoia National Park/mfe01179 ID. Matthes, F.E. 1179 Sequoia National Park, California. Removing a rock slide on Generals Highway. 1936. #1:/Sequoia National Park/mfe01180 ID. Matthes, F.E. 1180 Sequoia National Park, California. Rock slide on Generals Highway. 1936. #1:/Sequoia National Park/mfe01182 ID. Matthes, F.E. 1182 Sequoia National Park, California. Rock slide on Generals Highway. 1936. #1:/Sequoia National Park/mfe01184 ID. Matthes, F.E. 1184 Sequoia National Park, California. Removing a rock slide on Generals Highway. 1936. #1:/Sequoia National Park/mfe01186 ID. Matthes, F.E. 1186 Sequoia National Park, California. Removing a rock slide on Generals Highway. 1936. #1:/Sequoia National Park/mfe01197 ID. Matthes, F.E. 1197 Sequoia National Park, California. Upper canyon of Marble Fork, viewed from Watch Tower. 1936. #1:/Sequoia National Park/mfe01204 ID. Matthes, F.E. 1204 Sequoia National Park, California. Levees of rock grains at the sides of a rainwater rill near Wright Creek. Circa 1935. Photos mfe01204 and mfe01205 form a panorama. #1:/Sequoia National Park/mfe01205 ID. Matthes, F.E. 1205 Sequoia National Park, California. Levees of rock grains at the sides of a Rain water rill near Wright Creek. Circa 1935. Photos mfe01204 and mfe01205 form a panorama. #1:/Sequoia National Park/mfe01206 ID. Matthes, F.E. 1206 Sequoia National Park, California. Road cut on Generals Highway, a quarter of a mile above Ash Mountain Headquarters. The cut is through decomposed granite so rotten that it was readily trimmed back to a smooth slope by the road workers. Rain water has already cut deep furrows in the soft material. The little round hollows were made in order to induce plant growth on the raw bank. That this material is granitic rock, decayed in place, and not mere granite sand washed down from the mountain side is evident from the fact that the aplite dike (to which the man is pointing) is undisturbed. The aplite, which is highly siliceous and contains very little hornblende or biotite (the weakest minerals in the granite), decays much more slowly than the surrounding granite. Donald Mains in the foreground. 1935. #1:/Sequoia National Park/mfe01207 ID. Matthes, F.E. 1207 Sequoia National Park, California. Huge granite boulders obstructing the channel of the Middle Fork Kaweah River near Hospital Rock. These boulders, like many others in the vicinity including Hospital Rock itself, are much too large to have been transported by the stream, but are believed to have rolled down from nearby cliffs composed of sparsely fractured granite. Some may have fallen from the sides of Moro Rock, for boulders of this kind choke the ravines immediately west of that promontory. Whether the boulders were shaken down by an earthquake or simply rolled down when their positions became unstable through weathering of the rock masses that supported them is still a matter of conjecture. Circa 1936. #1:/Sequoia National Park/mfe01208 ID. Matthes, F.E. 1208 Sequoia National Park, California. Farewell Gap, viewed from a point above Mineral King. Circa 1935. #1:/Sequoia National Park/mfe01209 ID. Matthes, F.E. 1209 Sequoia National Park, California. West across the canyon of Marble Fork Kaweah River, showing one of the great cliffs of white marble from which the stream takes its name. The cliff is cut from a vertical bed of marble transected by the canyon. To the left of the marble bed are thin beds of various dark-hued metamorphic rocks. All of these strata are the stubs of a huge fold that probably once rose to a height of several thousand feet, but whether the upper portion of the fold (anticline) lay to the right or left is unknown. Circa 1935. #1:/Kings Canyon National Park/mfe01226 ID. Matthes, F.E. 1226 Kings Canyon National Park, California. General Grant Tree in General Grant Grove Section. July 1935. #1:/Sequoia National Park/mfe01227 ID. Matthes, F.E. 1227 Sequoia National Park, California. Milestone Peak and vicinity. Circa 1935. #1:/Sequoia National Park/mfe01241 ID. Matthes, F.E. 1241 Sequoia National Park, California. Hospital Rock. Circa 1935. #1:/Sequoia National Park/mfe01243 ID. Matthes, F.E. 1243 Sequoia National Park, California. Tourists on the summit of Moro Rock. July 1935. #1:/Sequoia National Park/mfe01244 ID. Matthes, F.E. 1244 Sequoia National Park, California. Moro Rock, viewed from Hospital Rock. July 1935. #1:/Sequoia National Park/mfe01245 ID. Matthes, F.E. 1245 Sequoia National Park, California. Tourists on the summit of Moro Rock. July 1935. #1:/Sequoia National Park/mfe01246 ID. Matthes, F.E. 1246 Sequoia National Park, California. Concrete steps have been built along the broken edge of the curving top shell of Moro Rock. This shell is already cracked in a number of places, and some of the fragments have slid a short distance as a result of gravity and pressure exerted by ice forming in the fractures. Circa 1935. #1:/Sequoia National Park/mfe01247 ID. Matthes, F.E. 1247 Sequoia National Park, California. Moro Rock, viewed from the south-southeast. The crown of the dome consists of a single thick curving shell. On the east side, a large section of the shell has fallen away exposing a new curving surface. Further dismantling of the dome is presaged by irregular cracks in the shells and the opening up of discontinuous joints. Photo by D. Mains, circa 1935. #1:/Sequoia National Park/mfe01257 ID. Matthes, F.E. 1257 Sequoia National Park, California. Ledges of marble on Generals Highway. Circa 1935. #1:/Sequoia National Park/mfe01258 ID. Matthes, F.E. 1258 Sequoia National Park, California. Indian basin on Beetle Creek. 1935. #1:/Sequoia National Park/mfe01262 ID. Matthes, F.E. 1262 Sequoia National Park, California. The most perfectly formed avalanche chute in the park, viewed from the High Sierra Trail east of the camp in Bearpaw Meadow. This chute is carved in massive exfoliating granite and terminates at the brink of the glacial U-shaped canyon below. The downward narrowing of the chute is explained by the protection given to the lower part of the chute by a snow cone on the surface of the glacier which lays in the canyon. Meltwater cascading from the snow in the chute has carved a gulch beneath it. The scales on the granite in the chute are produced by exfoliation and are purely superficial features. 1936. #1:/Sequoia National Park/mfe01264 ID. Matthes, F.E. 1264 Sequoia National Park, California. Current polish and potholes in the bed of the Kaweah River below Three Rivers. Photo by J.C. Patten, 1935. #1:/Sequoia National Park/mfe01266 ID. Matthes, F.E. 1266 Sequoia National Park, California. Current polish and potholes in the bed of the Kaweah River below Three Rivers. Photo by J.C. Patten, 1935. #1:/Sequoia National Park/mfe01268 ID. Matthes, F.E. 1268 Sequoia National Park, California. Current polish and potholes in the bed of the Kaweah River below Three Rivers. Photo by J.C. Patten, 1935. #1:/Sequoia National Park/mfe01271 ID. Matthes, F.E. 1271 Sequoia National Park, California. Moro Rock, viewed from Generals Highway. Photograph by J.C. Patten, 1935. #1:/Sequoia National Park/mfe01274 ID. Matthes, F.E. 1274 Sequoia National Park, California. Columnar basalt near the mouth of Golden Trout Creek. Photo by K. Flewelling, circa 1935. #1:/Sequoia National Park/mfe01275 ID. Matthes, F.E. 1275 Sequoia National Park, California. 70-foot block of granite in the bed of the Kaweah River near Hospital Rock. 1935. #1:/Sequoia National Park/mfe01278 ID. Matthes, F.E. 1278 Sequoia National Park, California. Crags on the west slope of the divide south of Mount Whitney. Photo by K. Flewelling, 1936. #1:/Sequoia National Park/mfe01280 ID. Matthes, F.E. 1280 Sequoia National Park, California. From the trail to Mount Whitney, showing the sheeted structure of the granite and the partly frozen tarn in the distance. Photo by K. Flewelling, 1936. #1:/Sequoia National Park/mfe01281 ID. Matthes, F.E. 1281 Sequoia National Park, California. Sun-pitted (sun cups?) snowfield on the west side of the summit of Mount Whitney. Photo by K. Flewelling, 1936. #1:/Sequoia National Park/mfe01283 ID. Matthes, F.E. 1283 Sequoia National Park, California. North from Mount Whitney, showing unglaciated spurs of Mount Barnard. Photo by K. Flewelling, 1935. #1:/Sequoia National Park/mfe01291 ID. Matthes, F.E. 1291 Sequoia National Park, California. Avalanche chutes in Milestone Basin. Photo by W.L. Huber, circa 1935. #1:/Sequoia National Park/mfe01304 ID. Matthes, F.E. 1304 Sequoia National Park, California. Mount Stanford, Mount Ericson, and Harrison Pass. 1935. #1:/Sequoia National Park/mfe01311 ID. Matthes, F.E. 1311 Sequoia National Park, California. West end of Tunnel Rock after completion of the fly road. Circa 1935. #1:/Sequoia National Park/mfe01312 ID. Matthes, F.E. 1312 Sequoia National Park, California. East end of Tunnel Rock fly road construction. Circa 1935. #1:/Sequoia National Park/mfe01313 ID. Matthes, F.E. 1313 Sequoia National Park, California. Tunnel Rock. Circa 1935. #1:/Sequoia National Park/mfe01319 ID. Matthes, F.E. 1319 Sequoia National Park, California. Snow chutes in massive exfoliating granite, viewed from Bearpaw Camp at the head of the canyon of Middle Fork Kaweah River (Valhalla). 1936. #1:/Sequoia National Park/mfe01336 ID. Matthes, F.E. 1336 Sequoia National Park, California. Stalactites in Clough Cave. Photo by K. Flewelling, 1936. #1:/Sequoia National Park/mfe01337 ID. Matthes, F.E. 1337 Sequoia National Park, California. Stalactites and stalagmites in Clough Cave. Photo by K. Flewelling, 1936. #1:/Sequoia National Park/mfe01374 ID. Matthes, F.E. 1374 Sequoia National Park, California. Kern Plateau, viewed from below Forester Pass. Photo by W.L. Huber, July 23, 1932. #1:/Sequoia National Park/mfe01376 ID. Matthes, F.E. 1376 Sequoia National Park, California. Whitney group over small lake below Sandy Plateau. Photo by W.L. Huber, circa 1935. #1:/Sequoia National Park/mfe01377 ID. Matthes, F.E. 1377 Sequoia National Park, California. Milestone Mountain. Photo by W.L. Huber, July 25 1932. #1:/Sequoia National Park/mfe01379 ID. Matthes, F.E. 1379 Sequoia National Park, California. Milestone Mountain. Photograph by W.L. Huber, July 26, 1932. #1:/Sequoia National Park/mfe01380 ID. Matthes, F.E. 1380 Sequoia National Park, California. Milestone Mountain. Photograph by W.L. Huber, July 26, 1932. #1:/Sequoia National Park/mfe01383 ID. Matthes, F.E. 1383 Sequoia National Park, California. The Kaweahs, viewed from Red Spur. Photo by W.L. Huber, circa 1932. #1:/Sequoia National Park/mfe01384 ID. Matthes, F.E. 1384 Sequoia National Park, California. Whitney Range across Kern Canyon, viewed from Milestone Basin. Photo by W.L. Huber, July 26, 1935. #1:/Sequoia National Park/mfe01388 ID. Matthes, F.E. 1388 Sequoia National Park, California. Junction Peak and Foresters Pass, viewed from Center Basin. Photo by W.L. Huber, July 22, 1932. #1:/Sequoia National Park/mfe01389 ID. Matthes, F.E. 1389 Sequoia National Park, California. Junction Peak. Photo by W.L. Huber, July 23, 1932. #1:/Sequoia National Park/mfe01390 ID. Matthes, F.E. 1390 Sequoia National Park, California. Pack train on the south side of Forester Pass. Photo by W.L. Huber, July 23, 1932. #1:/Sequoia National Park/mfe01394 ID. Matthes, F.E. 1394 Sequoia National Park, California. Kern Canyon, viewed from Rattlesnake Point. Photograph by L. Moe, circa 1935. Photos mfe01394 and mfe01395 form a panorama. #1:/Sequoia National Park/mfe01395 ID. Matthes, F.E. 1395 Sequoia National Park, California. Kern Canyon, viewed from Rattlesnake Point. Photograph by L. Moe, circa 1935. Photos mfe01394 and mfe01395 form a panorama. #1:/Sequoia National Park/mfe01396 ID. Matthes, F.E. 1396 Sequoia National Park, California. From near the summit of Mount Guyot, viewed from Chagoopa Plateau, up Kern Basin and to Boreal Plateau. Photo by L. Moe, circa 1935. Photos mfe01396, mfe01397, and mfe01398 form a panorama. #1:/Sequoia National Park/mfe01397 ID. Matthes, F.E. 1397 Sequoia National Park, California. From near the summit of Mount Guyot, viewed from Chagoopa Plateau, up Kern Basin and to Boreal Plateau. Photo by L. Moe, circa 1935. Photos mfe01396, mfe01397, and mfe01398 form a panorama. #1:/Sequoia National Park/mfe01398 ID. Matthes, F.E. 1398 Sequoia National Park, California. From near the summit of Mount Guyot, viewed from Chagoopa Plateau, up Kern Basin and to Boreal Plateau. Photo by L. Moe, circa 1935. Photos mfe01396, mfe01397, and mfe01398 form a panorama. #1:/Sequoia National Park/mfe01417 ID. Matthes, F.E. 1417 Sequoia National Park, California. Chagoopa Falls on the west side of Kern Canyon. Photo by K. Flewelling, 1936. #1:/Sequoia National Park/mfe01640 ID. Matthes, F.E. 1640 Sequoia National Park, California. North from Mount Whitney toward Mount Russell (center). Here, as a result of the headward quarrying of the glaciers that formerly occupied the opposing cirques, only the rock wall that connects the two peaks remains. The abundance of loose rock waste shows that the granite here breaks up readily - more readily than avalanches, running water, and gravity can remove the debris. The destructive action of the alternating frost and thaw is promoted by the numerous vertical joint fractures. Photo by K. Flewelling, circa 1935. Figure 12, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe01641 ID. Matthes, F.E. 1641 Sequoia National Park, California. Chagoopa Falls, which descends the steep west wall of Kern Canyon from a small hanging valley on the Chagoopa Plateau. The side valley was left hanging primarily as the result of rapid trenching by the master stream, but its height was increased by glacial deepening of Kern Canyon. Widening of the canyon by glacial erosion also steepened the descent of the cascades. Photo by K. Flewelling. Figure 17, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe01643 ID. Matthes, F.E. 1643 Sequoia National Park, California. Sixteen-foot erratic left on Bighorn Plateau by the ice of El Portal Stage. No continuous moraine exists here, only scattered ice-borne boulders. Many boulders are in the process of breaking up; others have already disintegrated into granite sand. The fragments at the base of the large boulder are spalls split from it by frost action. Circa 1935. Figure 26, U.S. Geological Survey Professional Paper 504-A. #1:/Sequoia National Park/mfe01644 ID. Matthes, F.E. 1644 Sequoia National Park, California. Spectacular summits south of Hamilton Lakes. They have been produced by glacial sculpturing in massive exfoliating granite. Circa 1935. Figure 34, U.S. Geological Survey Professional Paper 504-A. #1:/Yosemite National Park/mfe0460b ID. Matthes, F.E. 460b Yosemite National Park, California. From northeast of the Cockscomb. Circa 1917. #1:/Yosemite National Park/mfe0489a ID. Matthes, F.E. 489a Yosemite National Park, California. Bridalveil Fall, typical of the free leaping waterfalls of the Yosemite Valley. The Bridalveil makes an unbroken descent of 620 feet over a vertical precipice. Circa 1914. Plate 23-A, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/mfe0490b ID. Matthes, F.E. 490b Yosemite National Park, California. Lower Yosemite Fall, 320 feet in height, leaps over the side of a peculiar recess sharply incised into the cliffs and terminates in an alcove with an overhanging roof. Circa 1914. Plate 23-C, U.S. Geological Survey Professional Paper 160. #1:/Yosemite National Park/mfe0492b ID. Matthes, F.E. 492b Yosemite National Park, California. Upper Yosemite Fall. Circa 1918. #1:/Fuste L.A. Collection-Mount St. Helens*msh1980/mfla0001 ID. Mount St. Helens - Fuste, L.A. 1 Castle Creek, showing the damage caused by the mudflow triggered by the May 18 eruption. Cowlitz County, Washington.n.d. Portion is figure 3 in U.S. Geological Survey. Circular 850-B. 1981. #1:/Alaska Glaciers/mgc00003 ID. Martin, G.C. 3 Cliffs on north shore of Chinitna Bay. Enochin formation overlain by andesite. Cook Inlet, Alaska. cc 1900. #1:/Alaska Glaciers/mgc00004 ID. Martin, G.C. 4 Chinitan Bay from north shore. Chigmit Mountains in right background. Area of Enochin formation in left. #1:/Alaska Glaciers/mgc00103 ID. Martin, G.C. 103 Cold Bay, 3 miles from cabin just beyond mouth of Teresa Creek. Bold Cape, 40 feet high, lower 1/3 conglomerate, upper 2/3 sandstone. Alaska Peninsula, Alaska. Aug. 29, 1904. #1:/Alaska Glaciers/mgc00104 ID. Martin, G.C. 104 North side of Bold Cape, Cold Bay. Inclined as beds north of fault. Alaska Peninsula, Alaska. Aug. 29, 1904. #1:/Alaska Glaciers/mgc00105 ID. Martin, G.C. 105 Beyond Bold Cape, Cold Bay. Looking up the fault. Alaska Peninsula, Alaska. Aug. 29, 1904. #1:/Alaska Glaciers/mgc00106 ID. Martin, G.C. 106 On top of Bold Cape, South Shore of Cold Bay. Alaska Peninsula, Alaska. Aug. 29, 1904. #1:/Alaska Glaciers/mgc00107 ID. Martin, G.C. 107 On top of Bold Cape, Barren Hills along south shore of Bay (Hills B, C, and D) and Dry Creek. Kanatak District, Southwestern Alaska Region, Alaska. 1904. #1:/Alaska Glaciers/mgc00108 ID. Martin, G.C. 108 On top of Bold Cape, Hills west of Dry Creek, Cold Bay. Kanatak District, Southwestern Alaska Region, Alaska. Aug. 29, 1904. #1:/Alaska Glaciers/mgc00116 ID. Martin, G.C. 116 East Glacier northeast side of Mt. Douglas. Moraine dumps and ice front. Alaska Peninsula, Alaska. July 27, 1904. #1:/Alaska Glaciers/mgc00117 ID. Martin, G.C. 117 East Glacier northeast side of Mt. Douglas. Margin of ice along side. Alaska Peninsula, Alaska. July 27, 1904. #1:/Alaska Glaciers/mgc00118 ID. Martin, G.C. 118 East Glacier northeast side of Mt. Douglas. Granite extending under margin of ice and waterfall. Alaska Peninsula, Alaska. July 27, 1904. #1:/Alaska Glaciers/mgc00119 ID. Martin, G.C. 119 East Glacier northeast side of Mt. Douglas. Ice front and emerging stream showing mass that fell where we had just stood. Alaska Peninsula, Alaska. July 27, 1904. #1:/Alaska Glaciers/mgc00122 ID. Martin, G.C. 122 Two miles inside Kukak Bay, two stacks off shore in agglomerate. Alaska Peninsula, Alaska. August 4, 1904. #1:/Alaska Glaciers/mgc00144 ID. Martin, G.C. 144 Apollo Mine, Unga Shumagin Islands. Stamp Mill, from office. Alaska Peninsula, Alaska. September 3, 1904. #1:/Alaska Glaciers/mgc00146 ID. Martin, G.C. 146 Apollo Mine, Unga Shumagin Islands. Mill, Aerial Tram and Mine across valley. Alaska Peninsula, Alaska. September 3, 1904. #1:/Alaska Glaciers/mgc00245 ID. Martin, G.C. 245 Alaska Glaciers. First Berg Lake and Bering Glacier, viewed from Happy Hallow Trail. Elevation 1600 feet. Circa 1906. #1:/Alaska Glaciers/mgc00470 ID. Martin, G.C. 470 Alaska Glaciers. Tustumena Glacier, which is on the Kenai Peninsula, viewed from 1,000 feet from its terminus. Circa 1906. Photos mgc00470 and mgc00471 form a panorama. #1:/Alaska Glaciers/mgc00471 ID. Martin, G.C. 471 Alaska Glaciers. Tustumena Glacier, which is on the Kenai Peninsula, viewed from 1,000 feet from its terminus. Circa 1906. Photos mgc00470 and mgc00471 form a panorama. #1:/Alaska Glaciers/mgc00488 ID. Martin, G.C. 488 Alaska Glaciers. Bartlett Glacier, which is northeast of Seward in the Chugach Mountains, viewed from milepost 48 on the Alaska Central Railway. Circa 1906. #1:/Alaska Glaciers/mgc00498 ID. Martin, G.C. 498 Alaska Glaciers. Front of Grewingk Glacier, which is on the Kenai Peninsula east-southeast of Homer in the Chugach Mountains. Circa 1906. #1:/Alaska Glaciers/mgc00523 ID. Martin, G.C. 523 Alaska Glaciers. Tustumena Glacier, which is on the Kenai Peninsula. Circa 1906. Photos mgc00523, mgc00524, and mgc00525 form a panorama. #1:/Alaska Glaciers/mgc00524 ID. Martin, G.C. 524 Alaska Glaciers. Tustumena Glacier, which is on the Kenai Peninsula. Circa 1906. Photos mgc00523, mgc00524, and mgc00525 form a panorama. #1:/Alaska Glaciers/mgc00525 ID. Martin, G.C. 525 Alaska Glaciers. Tustumena Glacier, which is on the Kenai Peninsula. Circa 1906. Photos mgc00523, mgc00524, and mgc00525 form a panorama. #1:/Katmai National Park and Preserve/mgc00593 ID. Martin, G.C. 593 Katmai National Park and Preserve, Alaska. Barabaras (houses) in Kaguyak (var. Douglass) village covered with ash. Grass is coming through the ash, and slumps of wet ash are seen on the steep slopes. The ash was thoroughly saturated from rains at the time. July 14, 1912. Photo taken after the June 1912 eruption of Novarupta Volcano. #1:/Katmai National Park and Preserve/mgc00596 ID. Martin, G.C. 596 Katmai National Park and Preserve, Alaska. Main interior room of a barabara (house) showing a pile of volcanic ash under the smoke vent and an accumulation of fine dust on the top of the horizontal timbers. July 14, 1912. Photo taken after the June 1912 eruption of Novarupta Volcano. #1:/Katmai National Park and Preserve/mgc00599 ID. Martin, G.C. 599 Katmai National Park and Preserve, Alaska. Ash-covered graveyard and church at Kaguyak (var. Douglass) village. Grass growing through the ash. July 14, 1912. Photo taken after the June 1912 eruption of Novarupta Volcano. #1:/Katmai National Park and Preserve/mgc00625 ID. Martin, G.C. 625 Katmai National Park and Preserve, Alaska. Volcanic detritus deposit is 3 feet thick on the north end of Takli Island in Amalik Bay. The detritus is probably thicker on the mainland shown in the background. The wind bands on the water are floating or beached pumice. The dark water is clear water. August 8, 1912. Photo taken after the June 1912 eruption of Novarupta Volcano. Photos mgc00625, mgc00626, and mgc00627 form a panorama. #1:/Katmai National Park and Preserve/mgc00626 ID. Martin, G.C. 626 Katmai National Park and Preserve, Alaska. Volcanic detritus deposit is 3 feet thick on the north end of Takli Island in Amalik Bay. The detritus is probably thicker on the mainland shown in the background. The wind bands on the water are floating or beached pumice. The dark water is clear water. August 8, 1912. Photo taken after the June 1912 eruption of Novarupta Volcano. Photos mgc00625, mgc00626, and mgc00627 form a panorama. #1:/Katmai National Park and Preserve/mgc00627 ID. Martin, G.C. 627 Katmai National Park and Preserve, Alaska. Volcanic detritus deposit is 3 feet thick on the north end of Takli Island in Amalik Bay. The detritus is probably thicker on the mainland shown in the background. The wind bands on the water are floating or beached pumice. The dark water is clear water. August 8, 1912. Photo taken after the June 1912 eruption of Novarupta Volcano. Photos mgc00625, mgc00626, and mgc00627 form a panorama. #1:/Katmai National Park and Preserve/mgc00700 ID. Martin, G.C. 700 Katmai National Park and Preserve, Alaska. Perry refugee camp. July 9, 1912. #1:/Katmai National Park and Preserve/mgc00736 ID. Martin, G.C. 736 Katmai National Park and Preserve, Alaska. Wind erosion of volcanic ash near the head of the west arm of Amalik Bay after the June 1912 eruption of Novarupta Volcano. August 10, 1912. #1:/Katmai National Park and Preserve/mgc00744 ID. Martin, G.C. 744 Katmai National Park and Preserve, Alaska. Creek cutting a channel in a secondary accumulation of volcanic detritus at the base of a mountain west of Amalik Bay. Successive erosional benches are not due to uplift, but to the varying ratio of volume of water to volume of load. August 10, 1912. Photo taken after the June 1912 eruption of Novarupta Volcano. #1:/Katmai National Park and Preserve/mgc00745 ID. Martin, G.C. 745 Katmai National Park and Preserve, Alaska. Ash drifts around houses at Katmai after the June 1912 eruption of Novarupta Volcano. August 13, 1912. #1:/Katmai National Park and Preserve/mgc00747 ID. Martin, G.C. 747 Katmai National Park and Preserve, Alaska. Volcanic ash drifts around houses at Katmai after the June 1912 eruption of Novarupta Volcano. Church in the distant background. August 13, 1912. #1:/Katmai National Park and Preserve/mgc00748 ID. Martin, G.C. 748 Katmai National Park and Preserve, Alaska. Ash drifts around houses at Katmai after the June 1912 eruption of Novarupta Volcano. Ash slide on the mountain in the background. August 13, 1912. #1:/Katmai National Park and Preserve/mgc00750 ID. Martin, G.C. 750 Katmai National Park and Preserve, Alaska. Part of ash-covered Katmai after the June 1912 eruption of Novarupta Volcano. August 13, 1912. #1:/Katmai National Park and Preserve/mgc00755 ID. Martin, G.C. 755 Katmai National Park and Preserve, Alaska. Ash drifts around a house at Katmai after the June 1912 eruption of Novarupta Volcano. August 13, 1912. #1:/Glacier National Park/mrg00100 ID. McGimsey, R.G. 100ct Glacier National Park, Montana. Lava flows at Hole-in-the-Wall. August 1983. #1:/Glacier National Park/mrg00110 ID. McGimsey, R.G. 110ct Glacier National Park, Montana. Cryptocrystalline fillings of coalesced vesicle zone near the top of lava flows at Boulder Peak. August 1982. #1:/Glacier National Park/mrg00111 ID. McGimsey, R.G. 111ct Glacier National Park, Montana. Xenolith of Snowslip Formation in vent breccia on a knob 6784 feet northeast of Redhorn Peak. August 1982. #1:/Yellowstone National Park/mgr00679 ID. Mansfield, G.R. 679 Yellowstone National Park, Wyoming. Old Faithful Geyser in Upper Geyser Basin in eruption. September 26, 1923. #1:/Yellowstone National Park/mgr00680 ID. Mansfield, G.R. 680 Yellowstone National Park, Wyoming. Old Faithful in Upper Geyser Basin in eruption. September 26, 1923. #1:/Yellowstone National Park/mgr00681 ID. Mansfield, G.R. 681 Yellowstone National Park, Wyoming. Yellowstone Falls, viewed from a point near Canyon Camp. September 27, 1923. #1:/Yellowstone National Park/mgr00682 ID. Mansfield, G.R. 682 Yellowstone National Park, Wyoming. Yellowstone Canyon and Falls, viewed from Artist Point. September 27, 1923. #1:/Yellowstone National Park/mgr00684 ID. Mansfield, G.R. 684 Yellowstone National Park, Wyoming. Virginia Cascades on the Gibbon River. September 27, 1923. #1:/Craters of the Moon National Monument/mgr00728 ID. Mansfield, G.R. 728 Craters of the Moon National Monument, Idaho. Small cone, containing an "ice cave" southeast of Big Craters.W.B. Lang on the slope. July 31, 1925. #1:/Craters of the Moon National Monument/mgr00729 ID. Mansfield, G.R. 729 Craters of the Moon National Monument, Idaho. Recent basalt flow southeast of Big Craters. July 31, 1925. #1:/Craters of the Moon National Monument/mgr00735 ID. Mansfield, G.R. 735 Craters of the Moon National Monument, Idaho. Part of the fracture line marked by craters with late basalt flows. View is west from the road at a point due north of Big Sink Water Holes. July 31, 1925. #1:/Mansfield G.R. Collection-Utah Sulphur Industries/mgr00884 ID. Mansfield, G.R. 884 Old sulphur workings of Utah Sulphur Industries deposit at Sulphurdale, near Cove Fort. Beaver County, Utah. August 28, 1930. #1:/Mansfield G.R. Collection-Utah Sulphur Industries/mgr00885 ID. Mansfield, G.R. 885 Looking toward shipping plant from workings of Utah Sulphur Industries. Sulphurdale, Beaver County, Utah. August 20, 1930. #1:/Mansfield G.R. Collection/mgr00890 ID. Mansfield, G.R. 890 Looking down into principal sulphur pit at Sulphurdale workings. Beaver County, Utah. August 30, 1930. #1:/Bryce Canyon National Park/mgr00896 ID. Mansfield, G.R. 896 Bryce Canyon National Park, Utah. Down Bryce Canyon along the trail in the bottom between Navajo and Comanche Trails. August 30, 1930. #1:/Bryce Canyon National Park/mgr00897 ID. Mansfield, G.R. 897 Bryce Canyon National Park, Utah. Looking westward in Bryce Canyon from a point about half way up Comanche Trail. August 30, 1930. Photos mgr00897, mgr00898, and mgr00899 form a panorama. #1:/Bryce Canyon National Park/mgr00898 ID. Mansfield, G.R. 898 Bryce Canyon National Park, Utah. Looking westward in Bryce Canyon from a point about half way up Comanche Trail. August 30, 1930. Photos mgr00897, mgr00898, and mgr00899 form a panorama. #1:/Bryce Canyon National Park/mgr00899 ID. Mansfield, G.R. 899 Bryce Canyon National Park, Utah. Looking westward in Bryce Canyon from a point about half way up Comanche Trail. August 30, 1930. Photos mgr00897, mgr00898, and mgr00899 form a panorama. #1:/Zion National Park/mgr00908 ID. Mansfield, G.R. 908 Zion National Park, Utah. Sandstone cliffs along Pine Creek near Zion Canyon, viewed from a window in the tunnel. August 31, 1930. #1:/Zion National Park/mgr00911 ID. Mansfield, G.R. 911 Zion National Park, Utah. Up the Narrows of Zion Canyon from the end of tourist trail. August 31, 1930. #1:/Gros Ventre Landslide, Wyoming, June 23, 1925/mgr00935 ID. Mansfield, G.R. 935 Gros Ventre Landslide, Wyoming, June 23, 1925. Gros Ventre slide and outlet channel, viewed from a point on the road just below the slide. 1931. #1:/Grand Teton National Park/mgr01044 ID. Mansfield, G.R. 1044 Grand Teton National Park, Wyoming. The Tetons, viewed from the highway south of the entrance to the park. August 21, 1936. #1:/Hot Springs National Park/mhd00099 ID. Miser, H.D. 99 Hot Springs National Park, Arkansas. Part of Central Avenue, looking south. 1914. #1:/Canada/mhe00014 ID. Malde, H.E. 14 Canada. Saskatchewan Glacier, a tongue of the Columbia Ice Field, viewed from Parker Ridge, southeast of Mount Athabaska. August 2, 1954. #1:/Glacier National Park/mhe00024 ID. Malde, H.E. 24 Glacier National Park, Montana. Up Lake Sherburne valley toward the Grinnell area from the vicinity of Sherburne Ranger Station. June 30, 1954. #1:/Glacier National Park/mhe00043 ID. Malde, H.E. 43 Glacier National Park, Montana. Alluvial fan at the mouth of Canyon Creek, viewed from Appekunny Creek Falls. July 21, 1954. #1:/Glacier National Park/mhe00045 ID. Malde, H.E. 45 Glacier National Park, Montana. Sherburne Lake Valley and Lewis Range, Ptarmigan area to Siyeh Pass area, viewed from the Sherburne Fire Tower. July 26, 1954. #1:/Glacier National Park/mhe00048 ID. Malde, H.E. 48 Glacier National Park, Montana. Talus cone on the west wall of Canyon Creek valley about half-way up the valley length. July 28, 1954. #1:/Glacier National Park/mhe00050 ID. Malde, H.E. 50 Glacier National Park, Montana. Late Recent moraine of Siyeh Glacier at the head of Canyon Creek. July 28, 1951. #1:/Glacier National Park/mhe00051 ID. Malde, H.E. 51 Glacier National Park, Montana. Dissected early Recent talus sheets on the west side of Cracker Lake(?) on Canyon Creek. July 28, 1954. #1:/Glacier National Park/mhe00055 ID. Malde, H.E. 55 Glacier National Park, Montana. Late Recent moraine of Siyeh Glacier on Canyon Creek, viewed from a basin on the northwest. July 29, 1954. #1:/Glacier National Park/mhe00058 ID. Malde, H.E. 58 Glacier National Park, Montana. Hanging cirque west of Siyeh Glacier. Terminal moraines of early and late Recent shown on the right of the cirque. July 29, 1954. #1:/Glacier National Park/mhe00059 ID. Malde, H.E. 59 Glacier National Park, Montana. Cracker Lake and Canyon Creek Valley, viewed from Siyeh Glacier. July 29, 1951. #1:/Glacier National Park/mhe00060 ID. Malde, H.E. 60 Glacier National Park, Montana. Siyeh Glacier, viewed from the late Recent end moraine on Canyon Creek. July 29, 1951. #1:/Malde H.E. Collection-Canada/mhe00062 ID. Malde, H.E. 62 Saskatchewan Glacier, a tongue of the Columbia Ice Field, from Parker Ridge, southeast of Mount Athabaska. Province of Alberta, Canada. August 2, 1954. #1:/Glacier National Park/mhe00064 ID. Malde, H.E. 64 Glacier National Park, Montana. Patterned ground developed on rubble slope of about 20 degrees pitch southeast of Snow Moon Lake at the head of Allen Creek. August 3, 1954. #1:/Glacier National Park/mhe00065 ID. Malde, H.E. 65 Glacier National Park, Montana. Solifluction lobes developed in probable Wisconsin rubble or till southeast of Snow Moon Lake at the head of Allen Creek. August 3, 1954. #1:/Glacier National Park/mhe00067 ID. Malde, H.E. 67 Glacier National Park, Montana. Northwest across solifluction area developed in probable Wisconsin rubble or till southeast of Moon Lake on Allen Creek. August 3, 1954. #1:/Glacier National Park/mhe00069 ID. Malde, H.E. 69 Glacier National Park, Montana. Appekunny Mountain on the left and Yellow Mountain with Sherburne Peak in the right distance, viewed from the northeast spur of Allen Mountains. August 3, 1954. #1:/Glacier National Park/mhe00070 ID. Malde, H.E. 70 Glacier National Park, Montana. Early Recent moraine above (south of) Snow Moon Lake on Allen Creek. August 3, 1954. #1:/Glacier National Park/mhe00073 ID. Malde, H.E. 73 Glacier National Park, Montana. Till eroding from the bergschrund at the west wall behind Grinnell Glacier. Source of the till was from a higher part of the glacier, now disconnected, colloquially known as Salamander Glacier, which now clings to a ledge about 500 feet above Grinnell Glacier. View is from the north part of the terminal moraine of Grinnell Glacier. August 4, 1954. #1:/Glacier National Park/mhe00075 ID. Malde, H.E. 75 Glacier National Park, Montana. "Frost boil" developed in the late Recent till of Grinnell Glacier on the inside of the terminal moraine. August 4, 1954. #1:/Glacier National Park/mhe00076 ID. Malde, H.E. 76 Glacier National Park, Montana. Southeast terminal moraine ridge of Grinnell Glacier, viewed from the north terminal ridge. August 4, 1954. #1:/Glacier National Park/mhe00080 ID. Malde, H.E. 80 Glacier National Park, Montana. Up-valley of Boulder Creek from the east end of Boulder Ridge. East Flattop Mountain on the left, Matahpi Peak in the center, and Siyeh on the right. August 8, 1954. #1:/Glacier National Park/mhe00082 ID. Malde, H.E. 82 Glacier National Park, Montana. Latest late Recent moraine at the head of Wynn Mountain cirque and east tributary of Canyon Creek, viewed from near the east end of the moraine ridge crust. August 10, 1954. #1:/Glacier National Park/mhe00084 ID. Malde, H.E. 84 Glacier National Park, Montana. Latest late Recent moraine at the head of Wynn Mountain cirque, an eastern tributary of Canyon Creek, viewed from the east. August 10, 1954. #1:/Glacier National Park/mhe00086 ID. Malde, H.E. 86 Glacier National Park, Montana. North Swiftcurrent Glacier, viewed from the east spur of Swiftcurrent Mountain. August 11, 1954. #1:/Glacier National Park/mhe00088 ID. Malde, H.E. 88 Glacier National Park, Montana. Mouth of Allen Creek Valley, upper part, which hangs above the valley of Canyon Creek, viewed from the northwest spur of Wynn Mountain. August 12, 1954. #1:/Glacier National Park/mhe00089 ID. Malde, H.E. 89 Glacier National Park, Montana. Pollock Mountain and the headwaters of Cataract Creek, viewed from the southwest flank of Allen Mountain opposite Morning Eagle Falls. Two sills in Siyeh Limestone. August 25, 1954. Figure 131, U.S. Geological Survey Professional Paper 294-K. #1:/Glacier National Park/mhe00090 ID. Malde, H.E. 90 Glacier National Park, Montana. Mount Gould on the left and glacial "bastions" on the right in the vicinity of Feather Plume Falls, viewed from the cirque on the west side of Allen Mountain. August 25, 1954. #1:/Glacier National Park/mhe00091 ID. Malde, H.E. 91 Glacier National Park, Montana. Glacial "bastions" in the vicinity of Feather Plume Falls. Valley of Cataract Creek is at the bottom. Grinnell Glacier is beyond the bastions. Rightmost bastion is known colloquially as "Butterfly" Peak. Seen from the cirque on the west side of Allen Mountain. August 25, 1954. #1:/Glacier National Park/mhe00093 ID. Malde, H.E. 93 Glacier National Park, Montana. Moraine in the northernmost of two cirques on the west side of Allen Mountain, viewed from the top of the south wall of the cirque. August 25, 1954. #1:/Glacier National Park/mhe00096 ID. Malde, H.E. 96 Glacier National Park, Montana. Upper part of Boulder Creek valley, showing Going-to-the-Sun Mountain and Matahpi Peak, viewed from the southeast part of Wynn Mountain. August 26, 1954. #1:/Great Smoky Mountains National Park/mhe00114 ID. Malde, H.E. 114 Great Smoky Mountains National Park, Tennessee and North Carolina. Rock fold, quarter of a mile north of McCookville on Tennessee Highway 71. View is south- southwest. March 12, 1952. #1:/Great Smoky Mountains National Park/mhe00116 ID. Malde, H.E. 116 Great Smoky Mountains National Park, Tennessee and North Carolina. Interbedded sandstone and slate of Bullhead Unit at Chimneys campground overlook. March 12, 1952. #1:/Great Smoky Mountains National Park/mhe00139 ID. Malde, H.E. 139 Great Smoky Mountains National Park, Tennessee and North Carolina. Small block field beside North Carolina highway 107, south 30 degrees east from Newfound Gap. View is south 10 degrees west. March 25, 1952. #1:/Great Smoky Mountains National Park/mhe00141 ID. Malde, H.E. 141 Great Smoky Mountains National Park, Tennessee and North Carolina. North end of Big Cove. View is due north. March 25, 1952. #1:/Great Smoky Mountains National Park/mhe00144 ID. Malde, H.E. 144 Great Smoky Mountains National Park, Tennessee and North Carolina. Big Creek block field, 1.2 miles below the lower bridge. View is north 45 degrees west from the road. March 26, 1952. #1:/Great Smoky Mountains National Park/mhe00152 ID. Malde, H.E. 152 Great Smoky Mountains National Park, Tennessee and North Carolina. Slip cleavage in Metcalf phyllite in a cut on Cades Cove road on Laurel Creek immediately above the junction with West Prong Little River. General view shows low-dipping slaty cleavage crossed by steeply dipping slip cleavage and small chevron folds produced by deformation of slaty cleavage between planes of slip cleavage. March 14, 1952. Figure 16, (upper photo), U.S. Geological Survey Professional Paper 349-C. #1:/Great Smoky Mountains National Park/mhe00154 ID. Malde, H.E. 154 Great Smoky Mountains National Park, Tennessee and North Carolina. Pseudo- ripple marks on bedding surfaces of sandy siltstone of the Wilhite Formation at Cove Creek Cascades. Folded siltstone in the quarry on the north side of the bridge. Bedding and cleavage directions may be seen in the cross section in the rock face on the right. The rest of the surfaces in view are folded bedding. March 14, 1952. Figure 11, U.S. Geological Survey Professional Paper 349-C. #1:/Great Smoky Mountains National Park/mhe00165 ID. Malde, H.E. 165 Great Smoky Mountains National Park, Tennessee and North Carolina. Middle Prong Little Pigeon River, 2.15 miles south of the park boundary. Interbedded meta-sandstone and fine beds in Roaring Fork Unit. March 13, 1952. #1:/Great Smoky Mountains National Park/mhe00166 ID. Malde, H.E. 166 Great Smoky Mountains National Park, Tennessee and North Carolina. North end, east side of Emerts Cove. Colluvial fan at the mouth of a small side valley. View is north 50 degrees east from main valley floor. March 13, 1952 #1:/Chaco Culture National Historic Park/mhe00222 ID. Malde, H.E. 222ct Chaco Culture National Historic Park, New Mexico. Archaeological site 29 SJ 1360 during excavation. Chaco Wash in the middle distance. 1974. #1:/Chaco Culture National Historic Park/mhe00224 ID. Malde, H.E. 224ct Chaco Culture National Historic Park, New Mexico. Trenches in the area of waffle pattern east of Chettro Kettle Ruins. 1974. #1:/Chaco Culture National Historic Park/mhe00226 ID. Malde, H.E. 226ct Chaco Culture National Historic Park, New Mexico. Kin Kletso Ruins. 1974. #1:/Chaco Culture National Historic Park/mhe00228 ID. Malde, H.E. 228ct Chaco Culture National Historic Park, New Mexico. Chaco Canyon burn of May 1974, half a mile west of Wijiji Ruins. 1974. #1:/Chaco Culture National Historic Park/mhe00230 ID. Malde, H.E. 230ct Chaco Culture National Historic Park, New Mexico. Kin Bineola Ruins, viewed from the northeast. 1974. #1:/Chaco Culture National Historic Park/mhe00232 ID. Malde, H.E. 232ct Chaco Culture National Historic Park, New Mexico. Kin Bineola Ruins, viewed from the east. 1974. #1:/Chaco Culture National Historic Park/mhe00233 ID. Malde, H.E. 233ct Chaco Culture National Historic Park, New Mexico. Kin Bineola Ruins, viewed from the west. 1974. #1:/Chaco Culture National Historic Park/mhe00237 ID. Malde, H.E. 237ct Chaco Culture National Historic Park, New Mexico. Chaco Canyon at the confluence with Escavada Wash. 1974. #1:/Chaco Culture National Historic Park/mhe00240 ID. Malde, H.E. 240ct Chaco Culture National Historic Park, New Mexico. Chettro Kettle Ruins. Experimental stereo view of calls. Stereo-base is 37.8 centimeters plus or minus 0.1 centimeters. 1974. #1:/Chaco Culture National Historic Park/mhe00241 ID. Malde, H.E. 241ct Chaco Culture National Historic Park, New Mexico. Erosion caused by piping along the left bank of Chaco Wash. 1974. #1:/Chaco Culture National Historic Park/mhe00252 ID. Malde, H.E. 252ct Chaco Culture National Historic Park, New Mexico. Una Vida Ruins. 1974. #1:/Idaho/mhe00271 ID. Malde, H.E. 271 Idaho. Cross-beds in coarse sand of fluviatile facies of the Glenns Ferry Formation (late Pliocene), exposed near the top of a road cut of US 30 about 1.5 miles east of Hammett. Larger grains consist of pea-sized pumice. September 11, 1960. #1:/Idaho/mhe00272 ID. Malde, H.E. 272 Idaho. Cross-beds crowded with pea-sized pumice in a road cut exposure of fluviatile facies of the Glenns Ferry Formation (late Pliocene) on US 30 about 1.5 miles east of Hammett. The larger grains are pumice. Notice the shells left of center. September 11, 1960. #1:/Idaho/mhe00290 ID. Malde, H.E. 290 Idaho. Horst and graben in inclined alternating beds of sand and silt of the Bruneau Formation (middle Pleistocene) exposed along King Hill Canal at Deer Gulch 8 miles south-southeast of King Hill. September 22, 1960. #1:/Death Valley National Park/mhe00455 ID. Malde, H.E. 455 Death Valley National Park, California. Gravel fans rising from the edge of the salt-pan to the foot of the Panamint Range at the mouth of Hanaupah Canyon. The youngest gravels, the light-colored areas on the fans, are along the present washes and are important areas of recharge by floods issuing onto the fans from the mountains. The older gravels, stained dark with desert varnish, form terraces and are capped by desert pavement; these gravels favor run-off. The snow-capped peak is Telescope Peak, altitude 11,049 feet, and is the highest point on the rim of the hydrologic basin. Foreground altitude is 260 feet below sea level. Circa 1960. #1:/Malde H.E. Collection-Agate Fossil Beds National Monument/mhe00572 ID. Malde, H.E. 572ct Agate Springs Ranch. 2450' south, 1825' west, NE Cornor Sec. 6, T28N, R55W, Agate Quadrangle, Agate Fossil Beds National Monument. Sioux County, Nebraska. August 9, 1981. Repeats photo by unknown photographer ca. 1893-1895 owned by Mrs. Grayson Meade (Dorothy Cook), Agate, Nebraska. #1:/Malde H.E. Collection-Agate Fossil Beds National Monument/mhe00573 ID. Malde, H.E. 573ct Agate Springs Ranch, a different view. 2550' north, 1450' west, NE Cornor Sec. 6, T28N, R55W, Agate Quadrangle, Agate Fossil Beds National Monument. Sioux County, Nebraska. August 9, 1981. Repeats photo by unknown photographer ca. 1893-1895 owned by Mrs. Grayson Meade (Dorothy Cook) Agate, Nebraska. #1:/Agate Fossil Beds National Monument/mhe0572c ID. Malde, H.E. 572cct Agate Fossil Beds National Monument, Nebraska. Agate Springs Ranch. NE cor., sec.6, T. 28 N., R. 55 W. Sioux County, Nebraska. August 9, 1981. #1:/Agate Fossil Beds National Monument/mhe0573c ID. Malde, H.E. 573cct Agate Fossil Beds National Monument, Nebraska. Agate Springs Ranch. NE cor., sec 6, T. 28 N., R. 55 W. Sioux County, Nebraska. August 9, 1981. #1:/Malde H.E. Collection-Agate Fossil Beds National Monument/mhe00583 ID. Malde, H.E. 583ct Agate Fossil Bed National Monument, 450' south, 48' west of museum. SW/4 Sec. 3, T28N, R55W, Agate Fossil Beds National Monument. Sioux County, Nebraska. September 7, 1981. Repeats photo "Camp of scientists collecting at Agate Springs Fossil Quarries about 1907-1908 owned by Mrs. Grayson Meade (Dorothy Cook), Agate, Nebraska. #1:/Malde H.E. Collection-Agate Fossil Beds National Monument/mhe00585 ID. Malde, H.E. 585ct Repeats O.A. Peterson photo "Carnegie Hill" taken in 1906. Center S/2 Sec. 10, T28N, R55W. Agate Fossil Beds National Monument. Sioux County, Nebraska. September 7, 1981. #1:/Agate Fossil Beds National Monument/mhe00576 ID. Malde, H.E. 576ct Agate Fossil Beds National Monument, Nebraska. 450 feet south, 48 feet west of the museum. September 1, 1981. #1:/Agate Fossil Beds National Monument/mhe00577 ID. Malde, H.E. 577ct Agate Fossil Beds National Monument, Nebraska. Southeast down the draw from the Stenomylus quarry. The location is half a mile northwest down the draw, but the view is north. September 1, 1981. #1:/Agate Fossil Beds National Monument/mhe00578 ID. Malde, H.E. 578ct Agate Fossil Beds National Monument, Nebraska. Site of the Stenomylus quarry. September 1, 1981. #1:/Agate Fossil Beds National Monument/mhe0583c ID. Malde, H.E. 583cct Agate Fossil Bed National Monument, Nebraska. Camp of scientists collecting at the fossil quarries, 450 feet south, 48 feet west of the museum. SW 1/4 sec. 3, T. 28N., R. 55 W. Sioux County, Nebraska. September 7, 1981. #1:/Agate Fossil Beds National Monument/mhe0585c ID. Malde, H.E. 585cct Agate Fossil Beds National Monument, Nebraska. Carnegie Hill. Sioux County, Nebraska. S 1/2 sec. 10, T. 28 N., R. 55 W. September 7, 1981. #1:/Malde H.E. Collection-Idealite Plant-Clay Mine/mhe00689 ID. Malde, H.E. 689 Idealite plant and clay mine on Rocky Flats, Coal Creek in foreground, 2,100 feet W., 250 feet N., SE cor.sec. 32, T. 1 S., R. 70 W. Overburden dumped close to Coal Creek. Louisville quadrangle, Boulder County, Colorado. February 19, 1972. #1:/Agate Fossil Beds National Monument/mhe01241 ID. Malde, H.E. 1241 Agate Fossil Beds National Monument, Nebraska. South of the Stenomylus quarry, looking northeast. September 1, 1981. #1:/Agate Fossil Beds National Monument/mhe01248 ID. Malde, H.E. 1248 Agate Fossil Beds National Monument, Nebraska. South of the Stenomylus quarry, looking northeast. September 7, 1981. #1:/Agate Fossil Beds National Monument/mhe01249 ID. Malde, H.E. 1249 Agate Fossil Beds National Monument, Nebraska. Carnegie Hill. September 7, 1981. #1:/Death Valley National Park/mhe02573 ID. Malde, H.E. 2573ct Death Valley National Park, California. Fluted badlands in the area of Zabriskie Point. Panamint Mountains in the background. April 1974. #1:/Death Valley National Park/mhe02574 ID. Malde, H.E. 2574ct Death Valley National Park, California. Fluted badlands in the area of Zabriskie Point. Panamint Mountains in the background. April 1974. #1:/Malde H.E. Collection/mhe03978 ID. Malde, H.E. 3978ct Grassy channel and flood plain of Lance Creek with adjacent cultivated Lightning terrace. Creek runs through center of view. 2500' N., 2100' E., SW cor. sec. 28, T.35 N., R. 65 W. Flat Top quadrangle. Niobrara County, Wyoming. June 12, 1981. #1:/Malde H.E. Collection/mhe03994 ID. Malde, H.E. 3994ct Upstream view of Lance Creek from Kaycee Lightning terrace that is flooded about every 10 years. 2500' S., 650' E., NW cor. sec. 36,T. 37 N., R. 65 W. Funny Rock quadrangle. Niobrara County, Wyoming. June 25, 1981. #1:/Haeni F.P. Collection-Mount St. Helens*msh198005/mhfp0001 ID. Mount St. Helens Haeni, F.P. 1 Oblique aerial view of the confluence of the Columbia and Cowlitz Rivers showing suspended sediment and debris in the Cowlitz River. City of Longview in background. Cowlitz County, Washington. May 23, 1980. Figure 12 in U.S. Geological Survey. Circular 850-K. 1983. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0001 ID. Mount St. Helens Hoblitt, R. 1ct Aerial view of summit region of Mount St. Helens, looking northeast. Part of Spirit Lake visible in background at left. Flank of Mount Adams in background at right. Skamania and Yakima Counties, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0002 ID. Mount St. Helens Hoblitt, R. 2ct Aerial view of the summit region of Mount St. Helens looking northeast. Spirit Lake and Mount Adams in the background. Skamania and Yakima Counties, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0003 ID. Mount St. Helens Hoblitt, R. 3ct Aerial view of summit region of Mount St. Helens looking almost due east. Mount Adams visible in the background. Skamania and Yakima Counties, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0004 ID. Mount St. Helens Hoblitt, R. 4ct Aerial view of summit region of Mount St. Helens looking slightly south of east. Mount Adams visible in the background. Skamania and Yakima Counties, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0005 ID. Mount St. Helens Hoblitt, R. 5ct Aerial view of summit region of Mount St. Helens looking southeast. Mount Hood visible in background. Skamania County, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0007 ID. Mount St. Helens Hoblitt, R. 7ct Aerial view of snow-covered part of Mount St. Helens summit region looking northwest. Skamania County, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0008 ID. Mount St. Helens Hoblitt, R. 8ct Aerial view of snow-covered part of Mount St. Helens summit region looking west-northwest. Skamania County, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0009 ID. Mount St. Helens Hoblitt, R. 9ct Aerial view of Mount St. Helens summit region looking north-northwest, showing head of Shoestring Glacier. Skamania County, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0010 ID. Mount St. Helens Hoblitt, R. 10ct Aerial view of Mount St. Helens summit region looking northwest, showing head of Shoestring Glacier. Skamania County, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0011 ID. Mount St. Helens Hoblitt, R. 11ct Aerial view of Mount St. Helens looking subvertically down on region just south of Shoestring Glacier on right. Skamania County, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0012 ID. Mount St. Helens Hoblitt, R. 12ct Aerial view of summit region of Mount St. Helens, looking northeast. Mount Rainier visible in background. Skamania and Pierce Counties, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0013 ID. Mount St. Helens Hoblitt, R. 13ct Aerial view of summit region of Mount St. Helens looking northeast. Skamania County, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0014 ID. Mount St. Helens Hoblitt, R. 14ct Aerial view of Mount St. Helens looking down on Goat Rocks dome from the northwest. Skamania County, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0015 ID. Mount St. Helens Hoblitt, R. 15ct Aerial view of Mount St. Helens. Dogs Head dome viewed from the northeast. Skamania County, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0016 ID. Mount St. Helens Hoblitt, R. 16ct Aerial view of Mount St. Helens summit region. Shoestring Glacier at right and area south of glacier on left. Skamania County, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0017 ID. Mount St. Helens Hoblitt, R. 17ct Aerial view of Mount St. Helens looking subvertically down on headwaters of Swift Creek. Skamania County, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0018 ID. Mount St. Helens Hoblitt, R. 18ct Aerial view of Mount St. Helens looking north, showing Swift Glacier and apparent head of "Mitten" lava flow. Mt. Rainier visible in background. Skamania and Pierce Counties, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0019 ID. Mount St. Helens Hoblitt, R. 19ct Aerial view of Mount St. Helens looking northeast, showing source region of "Two-Fingers" lava flow. Skamania County, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0020 ID. Mount St. Helens Hoblitt, R. 20ct Aerial view of Mount St. Helens summit region and southwest dome looking northeast. Skamania County, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0021 ID. Mount St. Helens Hoblitt, R. 21ct Aerial view north over west flank of Mount St. Helens. Mount Rainier in distance. Skamania and Pierce Counties, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0023 ID. Mount St. Helens Hoblitt, R. 23ct Aerial view of Mount St. Helens looking east, showing head of "Two-Fingers" lava flow. Mount Adams in the distance. Skamania and Yakima Counties, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0024 ID. Mount St. Helens Hoblitt, R. 24ct Aerial view of Mount St. Helens, looking northeast at dome on southwest side. Mount Adams in the distance. Skamania and Yakima Counties, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0025 ID. Mount St. Helens Hoblitt, R. 25ct Aerial view looking northeast across northwest flank of Mount St. Helens. Spirit Lake and Mount Rainier in the distance. Skamania and Pierce Counties, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0026 ID. Mount St. Helens Hoblitt, R. 26ct Aerial view northeast across northwest flank of Mount St. Helens and canyon of South Fork Toutle River. Skamania County, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0027 ID. Mount St. Helens Hoblitt, R. 27ct Aerial view northeast across "Floating Island" lava flow, toward Spirit Lake, north of Mount St. Helens. Mount Adams in the background. Skamania and Yakima Counties, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0028 ID. Mount St. Helens Hoblitt, R. 28ct Aerial view southeast at northwest flank of Mount St. Helens looking up canyon of South Fork Toutle River. Mount Adams in background. Skamania and Yakima Counties, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0029 ID. Mount St. Helens Hoblitt, R. 29ct Aerial view from north of Mount St. Helens and surrounding countryside. Skamania County, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0030 ID. Mount St. Helens Hoblitt, R. 30ct Aerial view from morth-northeast of Mount St. Helens. Skamania County, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0031 ID. Mount St. Helens Hoblitt, R. 31ct Aerial view of Mount St. Helens southwest flank looking over Butte Camp Dome. McBride Lake in the foreground. Cowlitz and Skamania Counties, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0032 ID. Mount St. Helens Hoblitt, R. 32ct Aerial view from east of upper part of "Floating Island" lava flow, flank of Mount St. Helens, and countryside. Skamania County, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0033 ID. Mount St. Helens Hoblitt, R. 33ct Aerial view from southeast of lower part of "Floating Island" lava flow from Mount St. Helens. Skamania County, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0034 ID. Mount St. Helens Hoblitt, R. 34ct Aerial view from southeast of "Floating Island" lava flow and east Goat Rocks debris fan, Mount St. Helens. Skamania County, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0035 ID. Mount St. Helens Hoblitt, R. 35ct Aerial view from southeast of Mount St. Helens flank near head of South Fork Toutle River. Skamania County, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0036 ID. Mount St. Helens Hoblitt, R. 36ct Aerial view from southeast of Mount St. Helens flank near head of South Fork Toutle River. Studebaker Creek visible. Skamania County, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0037 ID. Mount St. Helens Hoblitt, R. 37ct Aerial view from south of Mount St. Helens flank showing head of South Fork Toutle River. Skamania County, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0038 ID. Mount St. Helens Hoblitt, R. 38ct Aerial view of Mount St. Helens. Upper end of "Floating Island" flow between arms of Wishbone Glacier on north-northwest side of mountain. Skamania County, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0039 ID. Mount St. Helens Hoblitt, R. 39ct Aerial view of Mount St. Helens summit region. Goat Rocks dome near center. Skamania County, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0040 ID. Mount St. Helens Hoblitt, R. 40ct Aerial view from west of Mount St. Helens north flank. Sugar Bowl and Dogs Head visible. Skamania County, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0041 ID. Mount St. Helens Hoblitt, R. 41ct Aerial view of Mount St. Helens from southeast looking up Shoestring Glacier and debris fan. "Worm complex" lava flows to left. Skamania County, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0042 ID. Mount St. Helens Hoblitt, R. 42ct Aerial view of Mount St. Helens from southeast looking up Shoestring Glacier and debris fan. "Worm complex" lava flows to left. Skamania County, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0043 ID. Mount St. Helens Hoblitt, R. 43ct Aerial view of Mount St. Helens from southeast looking at Shoestring Glacier, debris fan, and "worm complex" lava flows. Countryside visible at left. Skamania County, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0044 ID. Mount St. Helens Hoblitt, R. 44ct Aerial view of Mount St. Helens' southeast flank, showing Shoestring Glacier, debris fan, "worm complex" lava flows. Skamania County, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0045 ID. Mount St. Helens Hoblitt, R. 45ct Aerial view of Mount St. Helens' southeast flank showing "worm complex" lava flows. Skamania County, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0046 ID. Mount St. Helens Hoblitt, R. 46ct Aerial view of Mount St. Helens looking directly at "worm complex" lava flows on southeast flank. Skamania County, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0047 ID. Mount St. Helens Hoblitt, R. 47ct Aerial view of Mount St. Helens' southwest flank. "Two-Fingers" lava flow left of center. "Mitten" lava flow right of center. Skamania County, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0048 ID. Mount St. Helens Hoblitt, R. 48ct Aerial view of Mount St. Helens southwest flank showing Butte Camp Dome and "Two Fingers" lava flow. Mount Rainier in background. Skamania and Pierce Counties, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0050 ID. Mount St. Helens Hoblitt, R. 50ct Aerial view of Mount St. Helens southwest flank showing Butte Camp Dome and "Two-Fingers" lava flow. Skamania County, Washington. September 29, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0051 ID. Mount St. Helens Hoblitt, R. 51ct Aerial view of Mount St. Helens' southwest flank looking over Butte Camp Dome area. "Two-Fingers" lava flow right of center. Skamania County, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0052 ID. Mount St. Helens Hoblitt, R. 52ct Aerial view of Mount St. Helens southwest flank, Butte Camp Dome, Butte Canyon area. Skamania County, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0053 ID. Mount St. Helens Hoblitt, R. 53ct Aerial view of Mount St. Helens southwest flank showing Butte Camp Dome and Butte Canyon area. Skamania County, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0056 ID. Mount St. Helens Hoblitt, R. 56ct Aerial view of Mount St. Helens west side, including old St. Helens dome (according to Cliff Hopson) in center of photo. Skamania County, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0059 ID. Mount St. Helens Hoblitt, R. 59ct Aerial view of Mount St. Helens northwest flank. Canyon of South Fork Toutle River in foreground. Mount Adams in background. Skamania and Yakima Counties, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0062 ID. Mount St. Helens Hoblitt, R. 62ct Aerial view of Mount St. Helens east flank showing east side of dome. View does not include summit of mountain. Skamania County, Washington. September 28, 1979. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mhob0064 ID. Mount St. Helens Hoblitt, R. 64ct Aerial view of Mount St. Helens south flank, showing west side of "worm complex" lava flows, plus "Mitten" lava flow. Skamania County, Washington. September 28, 1979. #1:/Vallance J.W. Collection-Mount St. Helens*msh198007/mhrp0014 ID. Mount St. Helens Hoblitt, R. 14 Oblique aerial view of Mount St. Helens as viewed from the northwest, showing the second eruptive pulse at about 1826:30 PDT on July 22, 1980, about 13 seconds after the view shown in figure 5 (photo no. 13). Note that a vertical column is forming rapidly. Highest point on the eruption cloud is about 4,100 m above the highest point on the rim of the amphitheater. Photo by J.W. Vallance Skamania County, Washington. Figure 6 in U.S. Geological Survey. Professional paper 1335. 1986. #1:/Mount St. Helens*msh198007/mhrp0024 ID. Mount St. Helens Hoblitt, R. 24 Oblique aerial view of Mount St. Helens amphitheater as viewed from the North at 1916:48 PDT on July 22, 1980, showing helical nature of vertical-eruption Column that was visible once the ash cloud from the pyroclastic density flow shown in figure 9 dissipated. Skamania County, Washington. Figure 10 in U.S. Geological Survey. Professional paper 1335. 1986. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh198008/mhrp0025 ID. Mount St. Helens Hoblitt, R. 25 Mount St. Helens as viewed from Coldwater Peak (about 11 km north of vent) on August 7, 1980, sequence (12A-L). (photo nos. 25-36) showing the early part of the first eruptive pulse: A, 1626; B, 1626:47; C, 1627:55; D, 1628:44; E, 1629:17; F, 1629:27; G, 1630:02; H, 1630:18; 1, 1630:33; J, 1630:53; K, 163#1:22; L, 1632:15 PDT. Skamania County, Washington. Figure 12-A in U.S. Geological Survey. Professional paper 1335. 1986. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh198008/mhrp0026 ID. Mount St. Helens Hoblitt, R. 26 Mount St. Helens as viewed from Coldwater Peak (about 11 km north of vent) on August 7, 1980, sequence (12A-L). (photo nos. 25-36) showing the early part of the first eruptive pulse: A, 1626; B, 1626:47; C, 1627:55; D, 1628:44; E, 1629:17; F, 1629:27; G, 1630:02; H, 1630:18; 1, 1630:33; J, 1630:53; K, 163#1:22; L, 1632:15 PDT. Skamania County, Washington. Figure 12-B in U.S. Geological Survey. Professional paper 1335. 1986. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh198008/mhrp0027 ID. Mount St. Helens Hoblitt, R. 27 Mount St. Helens as viewed from Coldwater Peak (about 11 km north of vent) on August 7, 1980, sequence (12A-L). (photo nos. 25-36) showing the early part of the first eruptive pulse: A, 1626; B, 1626:47; C, 1627:55; D, 1628:44; E, 1629:17; F, 1629:27; G, 1630:02; H, 1630:18; I, 1630:33; J, 1630:53; K, 163#1:22; L, 1632:15 PDT. Skamania County, Washington. Figure 12-C in U.S. Geological Survey. Professional paper 1335. 1986. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh198008/mhrp0028 ID. Mount St. Helens Hoblitt, R. 28 Mount St. Helens as viewed from Coldwater Peak (about 11 km north of vent) on August 7, 1980, sequence (12A-L). (photo nos. 25-36) showing the early part of the first eruptive pulse: A, 1626; B, 1626:47; C, 1627:55; D, 1628:44; E, 1629:17; F, 1629:27; G, 1630:02; H, 1630:18; I, 1630:33; J, 1630:53; K, 163#1:22; L, 1632:15 PDT. Skamania County, Washington. Figure 12-D in U.S. Geological Survey. Professional paper 1335. 1986. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh198008/mhrp0029 ID. Mount St. Helens Hoblitt, R. 29 Mount St. Helens as viewed from Coldwater Peak (about 11 km north of vent) on August 7, 1980, sequence (12A-L). (photo nos. 25-36) showing the early part of the first eruptive pulse: A, 1626; B, 1626:47; C, 1627:55; D, 1628:44; E, 1629:17; F, 1629:27; G, 1630:02; H, 1630:18; I, 1630:33; J, 1630:53; K, 163#1:22; L, 1632:15 PDT. Skamania County, Washington. Figure 12-E in U.S. Geological Survey. Professional paper 1335. 1986. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh198008/mhrp0030 ID. Mount St. Helens Hoblitt, R. 30 Mount St. Helens as viewed from Coldwater Peak (about 11 km north of vent) on August 7, 1980, sequence (12A-L). (photo nos. 25-36) showing the early part of the first eruptive pulse: A, 1626; B, 1626:47; C, 1627:55; D, 1628:44; E, 1629:17; F, 1629:27; G, 1630:02; H, 1630:18; 1, 1630:33; J, 1630:53; K, 163#1:22; L, 1632:15 PDT. Skamania County, Washington. Figure 12-F in U.S. Geological Survey. Professional paper 1335. 1986. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh198008/mhrp0031 ID. Mount St. Helens Hoblitt, R. 31 Mount St. Helens as viewed from Coldwater Peak (about 11 km north of vent) on August 7, 1980, sequence (12A-L). (photo nos. 25-36) showing*the early part of the first eruptive pulse: A, 1626; B, 1626:47; C, 1627:55; D, 1628:44; E, 1629:17; F, 1629:27; G, 1630:02; H, 1630:18; I, 1630:33; J, 1630:53; K, 163#1:22; L, 1632:15 PDT. Skamania County, Washington. Figure 12-G in U.S. Geological Survey. Professional paper 1335. 1986. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh198008/mhrp0032 ID. Mount St. Helens Hoblitt, R. 32 Mount St. Helens as viewed from Coldwater Peak (about 11 km north of vent) on August 7, 1980, sequence (12A-L). (photo nos. 25-36) showing the early part of the first eruptive pulse: A, 1626; B, 1626:47; C, 1627:55; D, 1628:44; E, 1629:17; F, 1629:27; G, 1630:02; H, 1630:18; I, 1630:33; J, 1630:53; K, 163#1:22; L, 1632:15 PDT. Skamania County, Washington. Figure 12-H in U.S. Geological Survey. Professional paper 1335. 1986. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh198008/mhrp0033 ID. Mount St. Helens Hoblitt, R. 33 Mount St. Helens as viewed from Coldwater Peak (about 11 km north of vent) on August 7, 1980, sequence (12A-L). (photo nos. 25-36) showing the early part of the first eruptive pulse: A, 1626; B, 1626:47; C, 1627:55; D, 1628:44; E, 1629:17; F, 1629:27; G, 1630:02; H, 1630:18; 1, 1630:33; J, 1630:53; K, 163#1:22; L, 1632:15 PDT. Skamania County, Washington. Figure 12-1 in U.S. Geological Survey. Professional paper 1335. 1956. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh198008/mhrp0034 ID. Mount St. Helens Hoblitt, R. 34 Mount St. Helens as viewed from Coldwater Peak _(about 11 km north of vent) on August 7, 1980, sequence (12A-L). (photo nos. 25-36) showing the early part of the first eruptive pulse: A, 1626; B, 1626:47; C, 1627:55; D, 1628:44; E, 1629:17; F, 1629:27; G, 1630:02; H, 1630:18; I, 1630:33; J, 1630:53; K, 163#1:22; L, 1632:15 PDT. Skamania County, Washington. Figure 12-J in U.S. Geological Survey. Professional paper 1335. 1986. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh198008/mhrp0035 ID. Mount St. Helens Hoblitt, R. 35 Mount St. Helens as viewed from Coldwater Peak (about 11 km north of vent) on August 7, 1980, sequence (12A-L). (photo nos. 25-36) showing the early part of the first eruptive pulse: A, 1626; B, 1626:47; C, 1627:55; D, 1628:44; E, 1629:17; F, 1629:27; G, 1630:02; H, 1630:18; I, 1630:33; J, 1630:53; K, 163#1:22; L, 1632:15 PDT. Skamania County, Washington. Figure 12-K in U.S. Geological Survey. Professional paper 1335. 1986. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh198008/mhrp0036 ID. Mount St. Helens Hoblitt, R. 36 Mount St. Helens as viewed from Coldwater Peak (about 11 km north of vent) on August 7, 1980, sequence (12A-L). (photo nos. 25-36) showing the early part of the first eruptive pulse: A, 1626; B, 1626:47; C, 1627:55; D, 1628:44; E, 1629:17; F, 1629:27; G, 1630:02; H, 1630:18; 1, 1630:33; J, 1630:53; K, 163#1:22; L, 1632:15 PDT. Skamania County, Washington. Figure 12-L in U.S. Geological Survey. Professional paper 1335. 1986. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh198008/mhrp0037 ID. Mount St. Helens Hoblitt, R. 37 Mount St. Helens as viewed from the north on August 15, 1980. Dashed line shows path followed by the front of the western pyroclastic density flow of August 7. Braces show segments of flow path from which major ash-cloud protuberances emanated. Skamania County, Washington. (Graphics on published photo only) Figure 14 in U.S. Geological Survey. Professional paper 1335. 1986. #1:/Morris H.T. Collection-Chief Consolidated Mine-Victoria Mine/mht00001 ID. Morris, H.T. 1 Fitchville Ridge and Eureka Peak viewed from the north with southeastern part of Eureka City in foreground. Gardner Canyon at far left of photograph is a strike valley in steeply dipping to vertical beds of Gardison limestone; contact of Gardison limestone and Deseret limestone is on left side of Gardner Canyon. Prominent outcrops at crest of Fitchville Ridge, bold spur right of Gardner Canyon, mark Fitchville limestone. Eagle Canyon in center of photograph is cut into steeply dipping beds of Victoria formation, Bluebell dolomite and Fish Haven dolomite. Eureka Peak, the highest point on the ridge, is underlain by Opohonga limestone; contact of Opohonga limestone and Ajax dolomite is in prominent gully to right of peak. Mine buildings and large dump at right center is Chief Consolidated No. 1 mine; mine with high conical dump is Eagle and Bluebell mine; small mine dump in Eagle Canyon above and to left of Eagle and Bluebell mine marks location of Victoria mine; small dump below and to right of Eagle and Bluebell dump marks location of Snowflake shaft. Juab County, Utah. ca. 1952. Figure 1 in U.S. Geological Survey. Professional paper 361. 1961. #1:/Morris H.T. Collection-Apex Standard No. 2 shaft/mht00105 ID. Morris, H.T. 105 Apex Standard No. 2 shaft head frame and dump, looking north. Prominent ledges in background are Packard quartz latite. Utah County, Utah. ca. 1976. Figure 40 in U.S. Geological Survey. Professional paper 1024. 1979. #1:/Morris H.T. Collection-Burgin No. 2 shift/mht00106 ID. Morris, H.T. 106 Looking toward Burgin No. 2 shaft head frame and surface installations. Large building in center is mill. Pinyon Peak in background. Utah County, Utah. ca. 1976. Figure 42 in U.S. Geological Survey. Professional paper 1024. 1979. #1:/Morris H.T. Collection-Eureka Standard shaft/mht00107 ID. Morris, H.T. 107 Eureka Standard shaft site and dumps in foreground. Prominence in right background is Mineral Hill. Utah County, Utah. ca. 1976. Figure 50 in U.S. Geological Survey. Professional Paper 1024. 1979. #1:/Morris H.T. Collection-North Lily Mine/mht00108 ID. Morris, H.T. 108 The dump and general setting of the North Lily mine. Goshen Valley is in middle background, and the southern Wasatch Mountains are in the far background. Utah County, Utah. ca. 1976. Figure 56 in U.S. Geological Survey. Professional paper 1024. 1979. #1:/Morris H.T. Collection/mht00109 ID. Morris, H.T. 109 Surface installations of Trixie mine. Dumps in left background mark mines of Iron Blossom ore zone of main Tintic district. Utah County, Utah. ca. 1976. Figure 67 in U.S. Geological Survey. Professional paper 1024. 1979. #1:/Bryce Canyon National Park/miw00002 ID. Marine, I.W. 2 Bryce Canyon National Park, Utah. Yellow Creek Spring (circled) and Yellow Creek, viewed from the Paria View observation point. Figure 57, U.S. Geological Survey Water-Supply Paper 1475-M. #1:/Glacier Bay National Park and Preserve/mjb00706 ID. Mertie, J.B. 706 Glacier Bay National Park and Preserve, Alaska. Icebergs off the northeast shore of Glacier Bay, viewed from Tidal Inlet southeast half-way to Muir Inlet. July 28, 1919. #1:/Glacier Bay National Park and Preserve/mjb00707 ID. Mertie, J.B. 707 Glacier Bay National Park and Preserve, Alaska. Icebergs near the north entrance to Hugh Miller Inlet. July 28, 1919. #1:/Glacier Bay National Park and Preserve/mjb00712 ID. Mertie, J.B. 712 Glacier Bay National Park and Preserve, Alaska. Large iceberg off the mouth of Hugh Miller Inlet. July 24, 1919. #1:/Glacier Bay National Park and Preserve/mjb00715 ID. Mertie, J.B. 715 Glacier Bay National Park and Preserve, Alaska. Icebergs near the entrance to Reid Inlet on the left. July 24, 1919. #1:/Klondike Gold Rush National Historic Park/mjbj1565 ID. Mertie, jr., J.B. 1565 Klondike Gold Rush National Historic Park, Alaska. Unloading U.S. Geological Survey horses at Skagway. June 1, 1930. #1:/Klondike Gold Rush National Historic Park/mjbj1567 ID. Mertie, jr., J.B. 1567 Klondike Gold Rush National Historic Park, Alaska.U.S. Geological Survey packer leading a horse across the Skagway pier. June 1, 1930 #1:/Klondike Gold Rush National Historic Park/mjbj1623 ID. Mertie, jr., J.B. 1623 Klondike Gold Rush National Historic Park, Alaska. Single steam engine going down Broadway, viewed from railroad station platform. 1931. #1:/Klondike Gold Rush National Historic Park/mjbj2990 ID. Mertie, jr., J.B. 2990 Klondike Gold Rush National Historic Park, Alaska. Skagway, viewed from the east wall of the Skagway River valley. June 1, 1941. #1:/Death Valley National Park/mjf00001 ID. McAllister, J.F. 1 Death Valley National Park, California. Racetrack playa, a spit of dolomite rock fragments on mud cracked playa from which surficial mud curls were stripped by wind. Note pebble-size playa scrapers that dug furrows (left of center). #1:/McGregor J.K. Collection/mjk00008 ID. McGregor, J.K. 8ct Tilted strata of the Dakota exposed in I-70 road cut through Dakota hogback. From left to right: Ralston Creek and Morrison Formations overlaid by the Dakota Group consisting of the South Platte Formation and Lytle Formation. Jefferson County, Colorado. 1989. #1:/White Sands National Monument/mjk00016 ID. McGregor, J.K. 16ct White Sands National Monument, New Mexico. Disturbed ripple marks in gypsum sand at sunset. March 1989. #1:/White Sands National Monument/mjk00020 ID. McGregor, J.K. 20ct White Sands National Monument, New Mexico. Gypsum pedestal created by wind erosion. Blowout on the right. March 1989. #1:/White Sands National Monument/mjk00021 ID. McGregor, J.K. 21ct White Sands National Monument, New Mexico. Small gypsum pedestal topped by fourwing saltbush. Blowout in the foreground. March 1989. #1:/White Sands National Monument/mjk00022 ID. McGregor, J.K. 22ct White Sands National Monument, New Mexico. Deflation caused by vegetation. Prevailing wind is from left to right. Gypsum sand is deposited behind fourwing saltbush(?). March 1989. #1:/White Sands National Monument/mjk00024 ID. McGregor, J.K. 24ct White Sands National Monument, New Mexico. Circle patterns cut in gypsum sand by wind-blown grass. March 1989. #1:/White Sands National Monument/mjk00025 ID. McGregor, J.K. 25ct White Sands National Monument, New Mexico. Bedding planes of gypsum sand exposed in pedestal. March 1989. #1:/Los Angeles County, California, Landslides/mjt00004 ID. McGill, J.T. 4ct Los Angeles County, California, landslides. Santa Monica Palisades. Tilted palm trees on talus. View is northwest from the vicinity of Alta Avenue, showing people on the beach. May 12, 1978. #1:/Los Angeles County, California, Landslides/mjt00020 ID. McGill, J.T. 20ct Los Angeles County, California, landslides. Pacific Palisades. Winter 1978 debris flow, viewed from the bridge over the flood control channel at the north end of West Rustic Road in Rustic Canyon. May 21, 1978. #1:/Los Angeles County, California, Landslides/mjt00137 ID. McGill, J.T. 137ct Los Angeles County, California, landslides. Pacific Palisades. Landslide scarp next to 15263 Friends Street in Potrero Canyon. Note the broken and offset foundation. View is north. August 25, 1954. Photos mjt00137, mjt00140, and mjt00156 form a multi-year sequence. #1:/Los Angeles County, California, Landslides/mjt00140 ID. McGill, J.T. 140ct Los Angeles County, California, landslides. Pacific Palisades. Landslide scarp next to 15263 Friends Street in Potrero Canyon. Note the broken foundation tilted back toward the scarp. View is north. December 12, 1955. Photos mjt00137, mjt00140, and mjt00156 form a multi-year sequence. #1:/Los Angeles County, California, Landslides/mjt00156 ID. McGill, J.T. 156ct Los Angeles County, California, landslides. Pacific Palisades. Landslide scarp next to 15263 Friends Street in Potrero Canyon. Note the damage to the street and overhanging corner of the house. View is north-northeast. April 11, 1969. Photos mjt00137, mjt00140, and mjt00156 form a multi-year sequence. #1:/Los Angeles County, California, Landslides/mjt00187 ID. McGill, J.T. 187ct Los Angeles County, California, landslides. Pacific Palisades. Landslide at 15205 DePauw Street in middle Potrero Canyon. Overhanging rear of the house. View is south. November 18, 1955. Photos mjt00187, mjt00193, mjt00194, mjt00195, mjt00196, mjt00197, and mjt00198 form a multi-year sequence. #1:/Los Angeles County, California, Landslides/mjt00193 ID. McGill, J.T. 193ct Los Angeles County, California, landslides. Pacific Palisades. Landslide at 15205 DePauw Street in middle Potrero Canyon. Terrace gravels on Pliocene siltstone. The house overhangs the landslide area, and the garage is intact. View is northwest. February 1, 1956. Photos mjt00187, mjt00193, mjt00194, mjt00195, mjt00196, mjt00197, and mjt00198 form a multi-year sequence. #1:/Los Angeles County, California, Landslides/mjt00194 ID. McGill, J.T. 194ct Los Angeles County, California, landslides. Pacific Palisades. Landslide at 15205 DePauw Street in middle Potrero Canyon. Terrace gravels on Pliocene siltstone. The garage has been torn down except for the slab. Note seepage at the base of terrace deposits. View is northwest. November 2, 1956. Photos mjt00187, mjt00193, mjt00194, mjt00195, mjt00196, mjt00197, and mjt00198 form a multi-year sequence. #1:/Los Angeles County, California, Landslides/mjt00195 ID. McGill, J.T. 195ct Los Angeles County, California, landslides. Pacific Palisades. Landslide at 15205 DePauw Street in middle Potrero Canyon. Terrace gravels on Pliocene siltstone. Overhanging wing of the house has been demolished. View is northwest. November 21, 1957. Photos mjt00187, mjt00193, mjt00194, mjt00195, mjt00196, mjt00197, and mjt00198 form a multi-year sequence. #1:/Los Angeles County, California, Landslides/mjt00196 ID. McGill, J.T. 196ct Los Angeles County, California, landslides. Pacific Palisades. Landslide at 15205 DePauw Street in middle Potrero Canyon, viewed from the vicinity of Alma Real and Camarosa. View is northwest. February 28, 1958. Photos mjt00187, mjt00193, mjt00194, mjt00195, mjt00196, mjt00197, and mjt00198 form a multi- year sequence. #1:/Los Angeles County, California, Landslides/mjt00197 ID. McGill, J.T. 197ct Los Angeles County, California, landslides. Pacific Palisades. Landslide at 15205 DePauw Street in middle Potrero Canyon. One wing of the house is partially Destroyed. View is northwest. April 8, 1958. Photos mjt00187, mjt00193, mjt00194, mjt00195, mjt00196, mjt00197, and mjt00198 form a multi- year sequence. #1:/Los Angeles County, California, Landslides/mjt00198 ID. McGill, J.T. 198ct Los Angeles County, California, landslides. Pacific Palisades. Landslide at 15205 DePauw Street in middle Potrero Canyon. Red-brown gravel/white marine sand/Pliocene siltstone. The house is completely gone. Note seepages. View is northwest. June 6, 1958. Photos mjt00187, mjt00193, mjt00194, mjt00195, mjt00196, mjt00197, and mjt00198 form a multi-year sequence. #1:/Los Angeles County, California, Landslides/mjt00299 ID. McGill, J.T. 299ct Los Angeles County, California, landslides. Pacific Palisades. Start of cleanup of February 3, 1956, landslide at the west end of Via de las Olas. View is northwest. February 4, 1956. #1:/Los Angeles County, California, Landslides/mjt00317 ID. McGill, J.T. 317ct Los Angeles County, California, landslides. Pacific Palisades. Landslide at the west end of Via de las Olas which occurred at 6:50 a.m., March 27, 1958. Isetta car on the beach at the toe of the slide. View is west-northwest. 1#1:15 a.m., March 27, 1958. #1:/Los Angeles County, California, Landslides/mjt00319 ID. McGill, J.T. 319ct Los Angeles County, California, landslides. Pacific Palisades. Beginning cleanup of the landslide at the west end of Via de las Olas which occurred at 6:50 a.m., March 27, 1958. Damaged Isetta car on the beach on the left. 12:15 p.m., March 27, 1958. #1:/Los Angeles County, California, Landslides/mjt00495 ID. McGill, J.T. 495ct Los Angeles County, California, landslides. Pacific Palisades. Recent slumps beneath the Ocean Woods Estates apartment house at the mouth of Santa Ynez Canyon. September 9, 1978. #1:/Los Angeles County, California, Landslides/mjt00516 ID. McGill, J.T. 516ct Los Angeles County, California, landslides. Pacific Palisades. Damaged house and pool at 705 Enchanted Way in the Santa Ynez Canyon. View is west. August 18, 1959. #1:/Los Angeles County, California, Landslides/mjt00624 ID. McGill, J.T. 624ct Los Angeles County, California, landslides. Pacific Palisades. Mudflow of March 11, 1960, at 17948 Porto Marina Way in Castle Rock. View is north. April 7, 1960. #1:/Mount St. Helens*msh198006/mkhh0001 ID. Mount St. Helens - Kieffer, H.H. 1 Two Caterpillar tractors, one overturned, on the east side of Elk Rock, northwest of Mount St. Helens. One vehicle is overturned and buried approximately 3 feet. The other appears to have been displaced toward the northwest and its rear boom bent. Blown-down trees also in view. .5 miles east and .1 mile north of SW corner sec. 32; T. 10 N., R. 4 S. Cowlitz County, Washington. June 11, 1980. #1:/Mount St. Helens*msh198006/mkhh0002 ID. Mount St. Helens - Kieffer, H.H. 2 Tree blow-down on east side of Smith Creek, northeast of Mount St. Helens. Aerial view .5 mile east and.4 mile north of SW corner sec. 32, T. 9 N., R. 6 S. Skamania County, Washington. June 4, 1980. #1:/Mount St. Helens*msh198006/mkhh0003 ID. Mount St. Helens - Kieffer, H.H. 3 View northwest across the new Castle Creek Lake, northwest of Mount St. Helens. Skamania County, Washington. June 11, 1980. #1:/Mount St. Helens*msh198006/mkhh0004 ID. Mount St. Helens - Kieffer, H.H. 4 Aerial view of Mount St. Helens debris flow over Spirit Lake Lodge site, looking southwest. Skamania County, Washington. June 4, 1980. #1:/Mount St. Helens*msh198006/mkhh0005 ID. Mount St. Helens - Kieffer, H.H. 5 Aerial view of waterfall on east side of Smith Creek, northeast of Mount St. Helens, .2 mile east and .5 mile north of SW corner sec. 20, T. 9 N., R. 6 S. Skamania County, Washington. June 4, 1980. #1:/Mount St. Helens*msh198006/mkhh0006 ID. Mount St. Helens - Kieffer, H.H. 6 Aerial view of fumarole near the southwest limit of Spirit Lake, north of Mount St. Helens, view to the southwest. Skamania County, Washington. June 4, 1980. #1:/May D. Colleciton-Mount St. Helens*msh198006/mlei0003 ID. Mount St. Helens Leighley, T. 3ct Nearer aerial view of dome; plumes from fumaroles and crater wall in background. Photo by D. May Skamania County, Washington. June 28, 1980. #1:/May D. Colleciton-Mount St. Helens*msh198006/mlei0004 ID. Mount St. Helens Leighley, T. 4ct Aerial view of dome, looking south into crater. View includes rampart, dome, plumes from fumaroles in background. Photo by D. May. Skamania County, Washington. June 29, 1980. #1:/Casadevall T.J. Collection-Mount St. Helens*msh198007/mlei0005 ID. Mount St. Helens Leighley, T. 5ct Aerial view looking south showing dome, scattered fumaroles, crater wall and rim. Photo by T. Casadevall. Skamania County, Washington. July 1, 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198006/mlei0006 ID. Mount St. Helens Leighley, T. 6ct Aerial view looking south, showing dome, partially obscured by plumes from Mount St. Helens fumaroles. Photo by J. Rosenbaum. Skamania County, Washington. June 28, 1980. #1:/Doukas M.P. Collection-Mount St. Helens*msh198007/mlei0007 ID. Mount St. Helens Leighley, T. 7ct More distant aerial view, looking south, of crater and dome partially obscured by plumes from fumaroles. Photo by M. Doukas. Skamania County, Washington. July 13, 1980. #1:/Diehl S. Collection-Mount St. Helens*msh198007/mlei0008 ID. Mount St. Helens Leighley, T. 8ct Distant aerial view of ID. Mount St. Helens and dome, looking south. Photo by M. Doukas. Skamania County, Washington. July 18, 1980. #1:/Doukas M.P. Collection-Mount St. Helens*msh198007/mlei0009 ID. Mount St. Helens Leighley, T. 9ct Aerial view looking south showing dome and inner crater, rampart. Photo by M. Doukas. Skamania County, Washington. July 21, 1980. #1:/Leighley T. Collection-Mount St. Helens*msh198008/mlei0010 ID. Mount St. Helens Leighley, T. 10ct Aerial view of crater floor looking south; dome visible in shadow in middle ground. Skamania County, Washington. August 7, 1980. #1:/Leighley T. Collection-Mount St. Helens*msh198008/mlei0011 ID. Mount St. Helens Leighley, T. 11ct Inner crater and dome. Skamania County, Washington. August 13, 1980. #1:/Peterson S.W. Collection-Mount St. Helens*msh198008/mlei0012 ID. Mount St. Helens Leighley, T. 12ct Near-vertical aerial view of dome and surrounding crater floor. Photo by S.W. Peterson. Skamania County, Washington. August 20, 1980. #1:/Leighley T. Collection-Mount St. Helens*msh198008/mlei0013 ID. Mount St. Helens Leighley, T. 13ct Aerial view of dome and crater floor, looking south. Skamania County, Washington. August 20, 1980. #1:/Leighley T. Collection-Mount St. Helens*msh198009/mlei0014 ID. Mount St. Helens Leighley, T. 14ct Ground-level view of dome, looking north. Skamania County, Washington. September 4, 1980. #1:/Leighley T. Collection-Mount St. Helens*msh198009/mlei0015 ID. Mount St. Helens Leighley, T. 15ct Near view of dome, looking north, with airborne helicopter in far distance. Skamania County, Washington. September 4, 1980. #1:/Leighley T. Collection-Mount St. Helens*msh198009/mlei0018 ID. Mount St. Helens Leighley, T. 18ct Gas sampling instrument at radial crack in dome. Red glow of dome interior visible at crack. Skamania County, Washington. September 25, 1980. #1:/Leighley T. Collection-Mount St. Helens*msh198009/mlei0019 ID. Mount St. Helens Leighley, T. 19ct Scientist taking temperature measurement on dome. Small opening in dome crust shows red interior. Skamania County, Washington. September 25, 1980. #1:/Leighley T. Collection-Mount St. Helens*msh198010/mlei0022 ID. Mount St. Helens Leighley, T. 22ct Aerial view - first look at dome named "Muffie". Some red glow of dome interior visible through cracks. Skamania County, Washington. October 18, 1980. #1:/Leighley T. Collection-Mount St. Helens*msh198010/mlei0023 ID. Mount St. Helens Leighley, T. 23ct Aerial view of dome "Muffle", looking west. Skamania County, Washington. October 22, 1980. #1:/Leighley T. Collection-Mount St. Helens*msh198010/mlei0024 ID. Mount St. Helens Leighley, T. 24ct Aerial view of dome "Muffle" looking north. Skamania County, Washington. October 22, 1980. #1:/Leighley T. Collection-Mount St. Helens*msh198010/mlei0025 ID. Mount St. Helens Leighley, T. 25ct Dome "Muffie" up close, from ground level. Skamania County, Washington. October 22, 1980. #1:/Leighley T. Collection-Mount St. Helens*msh198010/mlei0026 ID. Mount St. Helens Leighley, T. 26ct Geologist collecting samples at edge of dome. Fumaroles and crater wall in distant background. Skamania County, Washington. October 24, 1980. #1:/Leighley T. Collection-Mount St. Helens*msh198010/mlei0027 ID. Mount St. Helens Leighley, T. 27ct Near view of south side of dome. Skamania County, Washington. October 24, 1980. #1:/Leighley T. Collection-Mount St. Helens*msh198011/mlei0028 ID. Mount St. Helens Leighley, T. 28ct Near aerial view of dome, surrounded by small fumaroles. Skamania County, Washington. November 25, 1980. #1:/Leighley T. Collection-Mount St. Helens*msh198012/mlei0031 ID. Mount St. Helens Leighley, T. 31ct Near view of dome from ground level. Skamania County, Washington. December 15, 1980. #1:/Leighley T. Collection-Mount St. Helens*msh1981/mlei0035 ID. Mount St. Helens Leighley, T. 35ct Aerial view of top of dome, showing cracks. Skamania County, Washington. January 2, 1981. #1:/Leighley T. Collection-Mount St. Helens*msh1981/mlei0037 ID. Mount St. Helens Leighley, T. 37ct Aerial view of dome and crater floor from south, with scattered fumaroles. Skamania County, Washington. January 7, 1981. #1:/Leighley T. Collection-Mount St. Helens*msh1981/mlei0038 ID. Mount St. Helens Leighley, T. 38ct Aerial view of dome from west slightly obscured by fumaroles. Skamania County, Washington. January 7, 1981. #1:/Leighley T. Collection-Mount St. Helens*msh1981/mlei0039 ID. Mount St. Helens Leighley, T. 39ct Scientist at cave on dome. Skamania County, Washington. January 15, 1981. #1:/Leighley T. Collection-Mount St. Helens*msh1981/mlei0040 ID. Mount St. Helens Leighley, T. 40ct Aerial view of dome from south, surrounded by fumaroles. Skamania County, Washington. February 3, 1981. #1:/Leighley T. Collection-Mount St. Helens*msh1981/mlei0042 ID. Mount St. Helens Leighley, T. 42ct Scientist in crack on north side of dome. Skamania County, Washington. February 3, 1981. #1:/Leighley T. Collection-Mount St. Helens*msh1981/mlei0054 ID. Mount St. Helens Leighley, T. 54ct Geologist on top of dome. Skamania County, Washington. March 9, 1981. #1:/Leighley T. Collection-Mount St. Helens*msh1981/mlei0055 ID. Mount St. Helens Leighley, T. 55ct Dome and crater looking south. Much of crater and walls snow-covered. Skamania County, Washington. March 9, 1981. #1:/Leighley T. Collection-Mount St. Helens*msh1981/mlei0056 ID. Mount St. Helens Leighley, T. 56ct Aerial view of dome and snow-covered crater, looking south. Skamania County, Washington. April 13, 1981. #1:/Leighley T. Collection-Mount St. Helens*msh1981/mlei0057 ID. Mount St. Helens Leighley, T. 57ct Snow-covered Mount St. Helens, looking south from Harry's river. Small plume rising from crater. Geologist at work in foreground. Skamania County, Washington. April 13, 1981. #1:/Leighley T. Collection-Mount St. Helens*msh1981/mlei0058 ID. Mount St. Helens Leighley, T. 58ct Dome and snow-covered crater floor, looking south. Skamania County, Washington. April 13, 1981. #1:/Leighley T. Collection-Mount St. Helens*msh1981/mlei0059 ID. Mount St. Helens Leighley, T. 59ct Snow covered dome and fumarole activity near dome. Skamania County, Washington. April 13, 1981. #1:/Leighley T. Collection-Mount St. Helens*msh1981/mlei0060 ID. Mount St. Helens Leighley, T. 60ct Dome and snow-covered crater. Fumarole plume rising from top of dome. Skamania County, Washington. April 14, 1981. #1:/Lipman P.W. Collection-Mount St. Helens*msh198004/mlip0001 ID. Mount St. Helens Lipman, P.W. 1ct Mount St. Helens is alive and well. Cougar, Cowlitz County, Washington. April 6, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198004/mlip0003 ID. Mount St. Helens Lipman, P.W. 3ct Aerial view of Mount St. Helens summit crater. Skamania County, Washington. April 7, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198004/mlip0004 ID. Mount St. Helens Lipman, P.W. 4ct Aerial view of Mount St. Helens summit crater with small steam plume. Skamania County, Washington. April 7, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198004/mlip0006 ID. Mount St. Helens Lipman, P.W. 6ct Aerial view into Mount St. Helens summit crater with small steam plume. Skamania County, Washington. April 7, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198004/mlip0007 ID. Mount St. Helens Lipman, P.W. 7ct Aerial view of ash plume from Mount St. Helens summit crater. Skamania County, Washington. April 7, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198004/mlip0008 ID. Mount St. Helens Lipman, P.W. 8ct Aerial view of ash plume from Mount St. Helens summit crater. Skamania County, Washington. April 7, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198004/mlip0010 ID. Mount St. Helens Lipman, P.W. 10ct Aerial view of ash cloud from Mount St. Helens. Skamania County, Washington. April 8, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198004/mlip0012 ID. Mount St. Helens Lipman, P.W. 12ct Mount St. Helens from Timberline. Skamania County, Washington. April 9, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198004/mlip0013 ID. Mount St. Helens Lipman, P.W. 13ct Geologists setting up reflectors on Sugar Bowl, northeast of Mount St. Helens. Skamania County, Washington. April 23, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198004/mlip0014 ID. Mount St. Helens Lipman, P.W. 14ct Geologist using geodimeter to measure deformation of Mount St. Helens from Smith Creek Butte. Skamania County, Washington. April 10, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198004/mlip0015 ID. Mount St. Helens Lipman, P.W. 15ct Geodimeter station on Smith Creek Butte, east of Mount St. Helens. Skamania County, Washington. April 25, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198005/mlip0016 ID. Mount St. Helens Lipman, P.W. 16ct Geologists at monitoring station at Timberline, northeast of Mount St. Helens. Skamania County, Washington. May 2, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198005/mlip0017 ID. Mount St. Helens Lipman, P.W. 17ct Geologists using geodimeter located at Timberline to measure deformation of north flank of Mount St. Helens. Skamania County, Washington. May 2, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198005/mlip0018 ID. Mount St. Helens Lipman, P.W. 18ct Geodimeter station at Toutle Canyon near Mount St. Helens. Skamania County, Washington. May 2, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198004/mlip0020 ID. Mount St. Helens Lipman, P.W. 20ct Check station on road going to Mount St. Helens. Washington. April 11, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198005/mlip0022 ID. Mount St. Helens Lipman, P.W. 22ct Aerial view of downed timber after May 18 eruption of Mount St. Helens. Skamania County, Washington. May 19, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198005/mlip0023 ID. Mount St. Helens Lipman, P.W. 23ct Aerial view of devastated timber area after May 18 eruption of Mount St. Helens. Skamania County, Washington. May 19, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198005/mlip0024 ID. Mount St. Helens Lipman, P.W. 24ct Aerial view of Mount St. Helens. Skamania County, Washington. May 19, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198005/mlip0026 ID. Mount St. Helens Lipman, P.W. 26ct Toe of Mount St. Helens debris flow just east of Camp Baker. Cowlitz County, Washington. May 19, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198005/mlip0027 ID. Mount St. Helens Lipman, P.W. 27ct Mount St. Helens from Spirit Lake. Skamania County, Washington. May 21, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198005/mlip0028 ID. Mount St. Helens Lipman, P.W. 28ct Bear Cove after May 18 eruption of Mount St. Helens. Skamania County, Washington. May 21, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198005/mlip0029 ID. Mount St. Helens Lipman, P.W. 29ct Spirit Lake from Bear Cove after May 18 eruption of Mount St. Helens. Skamania County, Washington. May 21, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198004/mlip0030 ID. Mount St. Helens Lipman, P.W. 30ct Aerial view of Spirit Lake, north of Mount St. Helens. Skamania County, Washington. April 10, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198004/mlip0032 ID. Mount St. Helens Lipman, P.W. 32ct Geologist using theodolite at Timberline, northeast of Mount St. Helens. Skamania County, Washington. April 27, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198004/mlip0034 ID. Mount St. Helens Lipman, P.W. 34ct Mount St. Helens from YMCA camp. Skamania County, Washington. April 27, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198006/mlip0036 ID. Mount St. Helens Lipman, P.W. 36ct Mount St. Helens and Spirit Lake outlet. Skamania County, Washington. June 29, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198006/mlip0037 ID. Mount St. Helens Lipman, P.W. 37ct Timberline "loop" site near Mount St. Helens. Skamania County, Washington. June 22, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198005/mlip0039 ID. Mount St. Helens Lipman, P.W. 39ct Spirit Lake, north of Mount St. Helens. Skamania County, Washington. May 24, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198005/mlip0040 ID. Mount St. Helens Lipman, P.W. 40ct Debris-avalanche deposit from Mount St. Helens. Don Swanson in foreground for scale. Skamania County, Washington. May 22, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198005/mlip0041 ID. Mount St. Helens Lipman, P.W. 41ct Large block of ice in the debris-avalanche deposit from Mount St. Helens. Skamania County, Washington. May 22, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198005/mlip0042 ID. Mount St. Helens Lipman, P.W. 42ct Pumice from Mount St. Helens. Skamania County, Washington. May 21, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198005/mlip0045 ID. Mount St. Helens Lipman, P.W. 45ct Pumice from Mount St. Helens. Helicopter in background. Skamania County, Washington. May 21, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198006/mlip0046 ID. Mount St. Helens Lipman, P.W. 46ct Downed trees at Elk Rock, northwest of Mount St. Helens. Cowlitz County, Washington. June 20, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198005/mlip0047 ID. Mount St. Helens Lipman, P.W. 47ct Debris from Mount St. Helens in South Fork of Toutle River. Geologist in background for scale. Cowlitz County, Washington. May 20, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198005/mlip0048 ID. Mount St. Helens Lipman, P.W. 48ct Downed and splintered trees near mouth of Castle Creek after May 18 eruption of Mount St. Helens. Cowlitz County, Washington. May 22, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198005/mlip0049 ID. Mount St. Helens Lipman, P.W. 49ct Splintered tree on Coldwater Ridge after May 18 eruption of Mount St. Helens. Geologist for scale. Skamania County, Washington. May 19, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198006/mlip0051 ID. Mount St. Helens Lipman, P.W. 51ct Pierre Vincent on ridge north of Spirit Lake, north of Mount St. Helens, looking south. Skamania County, Washington. June 20, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198006/mlip0052 ID. Mount St. Helens Lipman, P.W. 52ct Inverted tree stump above Harmony Falls, north of Mount St. Helens. Geologist for scale. Cowlitz County, Washington. June 21, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198005/mlip0053 ID. Mount St. Helens Lipman, P.W. 53ct Aerial view of seared zone south of Camp Baker after May 18 eruption of Mount St. Helens. Cowlitz County, Washington. May 22, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198005/mlip0055 ID. Mount St. Helens Lipman, P.W. 55ct Aerial view of Camp Baker, northwest of Mount St. Helens. Cowlitz County, Washington. May 19, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198005/mlip0056 ID. Mount St. Helens Lipman, P.W. 56ct Destroyed bridge on Toutle River northwest of Mount St. Helens. Cowlitz County, Washington. May 21, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198006/mlip0057 ID. Mount St. Helens Lipman, P.W. 57ct Car trapped in mudflow near Camp Baker, northwest of Mount St. Helens. Cowlitz County, Washington. June 14, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198006/mlip0058 ID. Mount St. Helens Lipman, P.W. 58ct Damaged truck and horse trailer at Ryan Lake, northeast of Mount St. Helens. Skamania County, Washington. June 22, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198006/mlip0059 ID. Mount St. Helens Lipman, P.W. 59ct Damaged truck and horse trailer with blistered paint and melted windows at Ryan Lake, northeast of Mount St. Helens. Skamania County, Washington. June 22, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198006/mlip0060 ID. Mount St. Helens Lipman, P.W. 60ct Overturned logging truck after Mount St. Helens eruptions. Man in photo for scale. Washington. June 26, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198006/mlip0061 ID. Mount St. Helens Lipman, P.W. 61ct Damaged Caterpillar on Coldwater Ridge, north of Mount St. Helens. Skamania County, Washington. June 26, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198006/mlip0063 ID. Mount St. Helens Lipman, P.W. 63ct Debris collected in iron grill of Caterpillar on Coldwater Ridge, north of Mount St. Helens. Skamania County, Washington. June 26, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198006/mlip0064 ID. Mount St. Helens Lipman, P.W. 64ct Aerial view of overturned logging truck after Mount St. Helens eruptions. Washington. June 21, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198005/mlip0065 ID. Mount St. Helens Lipman, P.W. 65ct Reid Blackburn's car on Coldwater I near Mount St. Helens. Skamania County, Washington. May 22, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198006/mlip0066 ID. Mount St. Helens Lipman, P.W. 66ct Trees protected by snowbank at Toutle station after Mount St. Helens eruptions. Cowlitz County, Washington. June 18, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198006/mlip0067 ID. Mount St. Helens Lipman, P.W. 67ct Avalanche lilies in bloom above St. Helens Lake, north of Mount St. Helens. Skamania County, Washington. June 20, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198005/mlip0069 ID. Mount St. Helens Lipman, P.W. 69ct Plane covered with ash at the Kelso Airport, west of Mount St. Helens. Cowlitz County, Washington. May 26, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198005/mlip0071 ID. Mount St. Helens Lipman, P.W. 71ct Geologists on Mount St. Helens May 25 ash flow. Skamania County, Washington. May 30, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198006/mlip0073 ID. Mount St. Helens Lipman, P.W. 73ct Trees knocked down by weight of ash that fell on May 25 near Camp Baker, northwest of Mount St. Helens. Cowlitz County, Washington. June 11, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198006/mlip0074 ID. Mount St. Helens Lipman, P.W. 74ct Trees knocked down by weight of ash that fell on May 25 near Camp Baker, northwest of Mount St. Helens. Cowlitz County, Washington. June 11, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198006/mlip0075 ID. Mount St. Helens Lipman, P.W. 75ct Geologists at station in Toutle Canyon near Mount St. Helens. Cowlitz County, Washington. June 19, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198005/mlip0076 ID. Mount St. Helens Lipman, P.W. 76ct New Castle target. Helicopter in background. Mount St. Helens, Skamania County, Washington. May 24, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198006/mlip0077 ID. Mount St. Helens Lipman, P.W. 77ct Southeast Ridge station, Mount St. Helens. Skamania County, Washington. June 18, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198008/mlip0078 ID. Mount St. Helens Lipman, P.W. 78ct Kid Valley geodetic target after August 7 eruption of Mount St. Helens. Skamania County, Washington. August 9, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198006/mlip0079 ID. Mount St. Helens Lipman, P.W. 79ct Geologist at Road 100 station, Mount St. Helens. Skamania County, Washington. June 29, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198006/mlip0080 ID. Mount St. Helens Lipman, P.W. 80ct Harry's Ridge station, Mount St. Helens. Helicopter in foreground. Skamania County, Washington. June 29, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198006/mlip0082 ID. Mount St. Helens Lipman, P.W. 82ct Aerial view of Mount St. Helens dome. Skamania County, Washington. June 28, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198006/mlip0083 ID. Mount St. Helens Lipman, P.W. 83ct Close-up view of Mount St. Helens dome. Skamania, County, Washington. June 28, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198006/mlip0084 ID. Mount St. Helens Lipman, P.W. 84ct Installing tiltmeter at "Clearcut". Mount St. Helens, Washington. 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198006/mlip0087 ID. Mount St. Helens Lipman, P.W. 87ct Jim Moore setting up rampart target. Mount St. Helens, Skamania County, Washington. June 29, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198006/mlip0088 ID. Mount St. Helens Lipman, P.W. 88ct Jim Moore setting up rampart target. Mount St. Helens, Skamania County, Washington. June 29, 1980. #1:/Lipman P.W. Collection-Mount St. Helens*msh198008/mlip0100 ID. Mount St. Helens Lipman, P.W. 100ct Time lapse of August 7, 1980, eruption of Mount St. Helens. Geologist in foreground for scale. Skamania County, Washington. #1:/Lipman P.W. Collection-Mount St. Helens*msh198008/mlip0101 ID. Mount St. Helens Lipman, P.W. 101ct Time lapse of August 7, 1980, eruption of Mount St. Helens. Geologist in foreground for scale. Skamania County, Washington. #1:/Lipman P.W. Collection-Mount St. Helens*msh198008/mlip0102 ID. Mount St. Helens Lipman, P.W. 102ct Time lapse of August 7, 1980, eruption of Mount St. Helens. Geologist in foreground for scale. Skamania County, Washington. #1:/Lipman P.W. Collection-Mount St. Helens*msh198008/mlip0103 ID. Mount St. Helens Lipman, P.W. 103ct Time lapse of August 7, 1980, eruption of Mount St. Helens. Geologist in foreground for scale. Skamania County, Washington. #1:/Lipman P.W. Collection-Mount St. Helens*msh198008/mlip0104 ID. Mount St. Helens Lipman, P.W. 104ct Time lapse of August 7, 1980, eruption of Mount St. Helens. Geologist in foreground for scale. Skamania County, Washington. #1:/Lipman P.W. Collection-Mount St. Helens*msh198008/mlip0105 ID. Mount St. Helens Lipman, P.W. 105ct Time lapse of August 7, 1980, eruption of Mount St. Helens. Geologist in foreground for scale. Skamania County, Washington. #1:/Lipman P.W. Collection-Mount St. Helens*msh198008/mlip0106 ID. Mount St. Helens Lipman, P.W. 106ct Time lapse of August 7, 1980, eruption of Mount St. Helens. Geologist in foreground for scale. Skamania County, Washington. #1:/Lipman P.W. Collection-Mount St. Helens*msh198008/mlip0107 ID. Mount St. Helens Lipman, P.W. 107ct Time lapse of August 7, 1980, eruption of Mount St. Helens. Geologist in foreground for scale. Skamania County, Washington. #1:/Lipman P.W. Collection-Mount St. Helens*msh198008/mlip0108 ID. Mount St. Helens Lipman, P.W. 108ct Time lapse of August 7, 1980, eruption of Mount St. Helens. Geologist in foreground for scale. Skamania County, Washington. #1:/Lipman P.W. Collection-Mount St. Helens*msh198008/mlip0109 ID. Mount St. Helens Lipman, P.W. 109ct Time lapse of August 7, 1980, eruption of Mount St. Helens. Geologist in foreground for scale. Skamania County, Washington. #1:/Lipman P.W. Collection-Mount St. Helens*msh198008/mlip0110 ID. Mount St. Helens Lipman, P.W. 110ct Time lapse of August 7, 1980, eruption of Mount St. Helens. Geologist in foreground for scale. Skamania County, Washington. #1:/Lipman P.W. Collection-Mount St. Helens*msh198008/mlip0111 ID. Mount St. Helens Lipman, P.W. 111ct Time lapse of August 7, 1980, eruption of Mount St. Helens. Geologist in foreground for scale. Skamania County, Washington. #1:/Lipman P.W. Collection-Mount St. Helens*msh198008/mlip0112 ID. Mount St. Helens Lipman, P.W. 112ct Time lapse of August 7, 1980, eruption of Mount St. Helens. Geologist in foreground for scale. Skamania County, Washington. #1:/Lipman P.W. Collection-Mount St. Helens*msh198008/mlip0113 ID. Mount St. Helens Lipman, P.W. 113ct Time lapse of Mount St. Helens eruption, pyroclastic flow of August 7, 1980. Skamania County, Washington. #1:/Lipman P.W. Collection-Mount St. Helens*msh198008/mlip0114 ID. Mount St. Helens Lipman, P.W. 114ct Time lapse of Mount St. Helens eruption, pyroclastic flow of August 7, 1980. Skamania County, Washington. #1:/Lipman P.W. Collection-Mount St. Helens*msh198008/mlip0115 ID. Mount St. Helens Lipman, P.W. 115ct Time lapse of Mount St. Helens eruption, pyroclastic flow of August 7, 1980. Skamania County, Washington. #1:/Lipman P.W. Collection-Mount St. Helens*msh198008/mlip0116 ID. Mount St. Helens Lipman, P.W. 116ct Time lapse of Mount St. Helens eruption, pyroclastic flow of August 7, 1980. Skamania County, Washington. #1:/Lipman P.W. Collection-Mount St. Helens*msh198008/mlip0117 ID. Mount St. Helens Lipman, P.W. 117ct Time lapse of Mount St. Helens eruption, pyroclastic flow of August 7, 1980. Skamania County, Washington. #1:/Lipman P.W. Collection-Mount St. Helens*msh198008/mlip0118 ID. Mount St. Helens Lipman, P.W. 118ct Time lapse of August 7, 1980, eruption of Mount St. Helens. Geologists in foreground for scale against ash cloud. Skamania County, Washington. #1:/Lipman P.W. Collection-Mount St. Helens*msh198008/mlip0119 ID. Mount St. Helens Lipman, P.W. 119ct Time lapse of August 7, 1980, eruption of Mount St. Helens. Geologists in foreground for scale against ash cloud. Skamania County, Washington. #1:/Lukk M. Collection-Mount St. Helens*msh198007/mluk0001 ID. Mount St. Helens Lukk, M. 1ct First eruption of July 22, 1980 as seen from Marine Drive, Portland. Columbia River is in foreground. Multnomah County, Oregon. #1:/Lukk M. Collection-Mount St. Helens*msh198008/mluk0009 ID. Mount St. Helens Lukk, M. 9ct Remote TV camera hut on Harry's Ridge, north of Mount St. Helens. Skamania County, Washington. August 6, 1980. #1:/Lukk M. Collection-Mount St. Helens*msh198008/mluk0010 ID. Mount St. Helens Lukk, M. 10ct Laser survey instrument set up; north of Mount St. Helens. Skamania County, Washington. August 6, 1980. #1:/Lukk M. Collection-Mount St. Helens*msh198008/mluk0012 ID. Mount St. Helens Lukk, M. 12ct Slide debris on northeast wall of amphitheater, viewed from rampart. Skamania County, Washington. August 6, 1980. #1:/McKnight D.M. Collection-Mount St. Helens*msh1980/mmdm0001 ID. Mount St. Helens - McKnight, D.M. 1 Photomicrographs showing morphological differences between Anabaena flosaquae grown in cultures exposed to various concentrations of unfractionated leachate from volcano nic ash collected at Richland. Control cultures. (Enlargements of photomicrographs taken of unpreserved cultures with light microscope) Benton County, Washington. 1980. Figure 5-A in U.S. Geological Survey. Circular 850-F. 1981; as figure 433-A in U.S. Geological Survey. Professional paper 1250. 1981. #1:/McKnight D.M. Collection-Mount St. Helens*msh1980/mmdm0002 ID. Mount St. Helens - McKnight, D.M. 2 Photomicrographs showing morphological differences between Anabaena flosaquae grown in cultures exposed to various concentrations of unfractionated leachate from volcano nic ash collected at Richland. Cultures exposed to a #1:35 dilution. (Enlargements of photomicrographs taken of unpreserved cultures with light microscope) Benton County, Washington. 1980. Figure 5-B in U.S. Geological Survey. Circular 850-F. 1981; figure 433-B in U.S. Geological Survey. Professional paper 1250. 1981. #1:/McKnight D.M. Collection-Mount St. Helens*msh1980/mmdm0003 ID. Mount St. Helens - McKnight, D.M. 3 Photomicrographs showing morphological differences between Anabaena flosaquae grown in cultures exposed to various concentrations of unfractionated leachate from volcanic ash collected at Richland. Cultures exposed to a #1:250 dilution. (Enlargements of photomicrographs taken of unpreserved cultures with light microscope) Benton County, Washington. 1980. Figure 5-C in U.S. Geological Survey. Circular 850-F. 1981; figure 433-C in U.S. Geological Survey. Professional paper 1250. 1981. #1:/McKnight D.M. Collection-Mount St. Helens*msh198007/mmdm0004 ID. Mount St. Helens - McKnight, D.M. 4 Vertical aerial views of South Fork Castle Lake: View on July 20, 1980. Cowlitz County, Washington. Figure 2-A in U.S. Geological Survey. Circular 850-L. 1984. #1:/McKnight D.M. Collection-Mount St. Helens*msh198011/mmdm0005 ID. Mount St. Helens - McKnight, D.M. 5 Vertical aerial views of South Fork Castle Lake: View on November 11, 1980. Cowlitz County, Washington. Published as figure 2-B in U.S. Geological Survey. Circular 850-L. 1984. #1:/McKnight D.M. Collection-Mount St. Helens*msh1981b/mmdm0006 ID. Mount St. Helens - McKnight, D.M. 6 Vertical aerial views of South Fork Castle Lake: View on March 1, 1981. Cowlitz County, Washington. Figure 2-C in U.S. Geological Survey. Circular 850-L. 1984. #1:/McKnight D.M. Collection-Mount St. Helens*msh1981/mmdm0007 ID. Mount St. Helens - McKnight, D.M. 7 Vertical aerial views of South Fork Castle Lake: View on July 27, 1981. Cowlitz County, Washington. Figure 2-D in U.S. Geological Survey. Circular 850-L. 1984. #1:/Mount St. Helens*msh1980/mmdr0001 ID. Mount St. Helens - mmdr, 1 Mount St. Helens from the southeast. A large fan in the center foreground consists largely of volcanic mudflows and stream sediments, and probably includes avalanche deposits. Skamania County, Washington.n.d. (pre-eruption). #1:/Mount St. Helens*msh1980/mmdr0002 ID. Mount St. Helens - mmdr, 2 Pre-eruption aerial view northeastward. Mount St. Helens in the foreground, shows Talus, Toutle, Wishbone Glaciers, and Goat Rocks, Mount Rainer is in background. Skamania, Lewis and Pierce Counties, Washington.n.d. #1:/Mount St. Helens*msh1980/mmdr0003 ID. Mount St. Helens - mmdr, 3 Pre-eruption view of Mount St. Helens north flank at timberline. T/W rook and T/W pumice layers. Skamania County, Washington, n.d. #1:/Mount St. Helens*msh1980/mmdr0004 ID. Mount St. Helens - mmdr, 4 Pre-eruption aerial view eastward from over the northwest flank of Mount St. Helens, Spirit Lake in the middle ground. Skamania County, Washington.n.d. #1:/Mount St. Helens*msh1980/mmdr0005 ID. Mount St. Helens - mmdr, 5 Pre-eruption aerial view northeastward of Mount St. Helens in the foreground, Mount Rainer in background. Skamania, Lewis and Pierce Counties, Washington.n.d. #1:/Mount St. Helens*msh1980/mmdr0006 ID. Mount St. Helens - mmdr, 6 Pre-eruption aerial view of northeastern flank of Mount St. Helens. Spirit Lake in foreground. Skamania County, Washington.n.d. #1:/Mullineaux D.R. Collection-Mount St. Helens*msh1964/mmdr0007 ID. Mount St. Helens Mullineaux, D.R. 7ct Mount St. Helens north flank at timberline. T/W rock and T/W pumice layers. Skamania County, Washington. August, 1964. #1:/Mullineaux D.R. Collection-Mount St. Helens*msh1964/mmdr0008 ID. Mount St. Helens Mullineaux, D.R. 8ct Mount St. Helens surface from south side. Skamania County, Washington. August, 1964. #1:/Mullineaux D.R. Collection-Mount St. Helens*msh1964/mmdr0009 ID. Mount St. Helens Mullineaux, D.R. 9ct Dogs Head, north flank of Mount St. Helens. 1,600-year-old basalts. Skamania County, Washington. August, 1964. #1:/Mullineaux D.R. Collection-Mount St. Helens*msh1964/mmdr0010 ID. Mount St. Helens Mullineaux, D.R. 10ct Aerial view looking northeast towards Mount Rainier. Mount St. Helens in foreground. Skamania, Lewis, and Pierce Counties, Washington. September, 1964. #1:/Mullineaux D.R. Collection-Mount St. Helens*msh1964/mmdr0012 ID. Mount St. Helens Mullineaux, D.R. 12ct Aerial view of Mount St. Helens from northeast showing timberline area and peak. Skamania County, Washington. September, 1964. #1:/Mullineaux D.R. Collection-Mount St. Helens*msh1964/mmdr0015 ID. Mount St. Helens Mullineaux, D.R. 15ct Aerial view of Mount St. Helens from northwest. Skamania County, Washington. September, 1964. #1:/Mullineaux D.R. Collection-Mount St. Helens*msh1964/mmdr0016 ID. Mount St. Helens Mullineaux, D.R. 16ct Aerial view from east of Mount St. Helens. Skamania County, Washington. September, 1964. #1:/Mullineaux D.R. Collection-Mount St. Helens*msh1964/mmdr0017 ID. Mount St. Helens Mullineaux, D.R. 17ct Mount St. Helens from southeast side. Skamania County, Washington. May, 1965. #1:/Mullineaux D.R. Collection-Mount St. Helens*msh1970/mmdr0018 ID. Mount St. Helens Mullineaux, D.R. 18ct Shoestring Glacier, southeast side of Mount St. Helens. Skamania County, Washington. September, 1970. #1:/Mullineaux D.R. Collection-Mount St. Helens*msh1972/mmdr0019 ID. Mount St. Helens Mullineaux, D.R. 19ct Mount St. Helens from east. Skamania County, Washington. July 15, 1972. #1:/Mullineaux D.R. Collection-Mount St. Helens*msh1972/mmdr0020 ID. Mount St. Helens Mullineaux, D.R. 20ct Mount St. Helens from northeast. Skamania County, Washington. August, 1972. #1:/Mullineaux D.R. Collection-Mount St. Helens*msh1973/mmdr0023 ID. Mount St. Helens Mullineaux, D.R. 23ct Mount St. Helens from 4km southwest of summit. Skamania County, Washington. September 25, 1973. #1:/Mullineaux D.R. Collection-Mount St. Helens*msh1974/mmdr0025 ID. Mount St. Helens Mullineaux, D.R. 25ct Mount St. Helens from northeast on Road 100. Skamania County, Washington. September, 1974. #1:/Mullineaux D.R. Collection-Mount St. Helens*msh1974/mmdr0026 ID. Mount St. Helens Mullineaux, D.R. 26ct Bomb layer (T) at Sugar Bowl, Mount St. Helens. Spirit Lake in middle ground. Mount Rainier in background. Skamania County, Washington. September 6, 1974. #1:/Mullineaux D.R. Collection-Mount St. Helens*msh1974/mmdr0027 ID. Mount St. Helens Mullineaux, D.R. 27ct Mount St. Helens from Coldwater Peak. Skamania County, Washington. September 16, 1974. #1:/Mullineaux D.R. Collection-Mount St. Helens*msh1974/mmdr0028 ID. Mount St. Helens Mullineaux, D.R. 28ct Scenic view from south of Mount St. Helens. Skamania County, Washington. September 18, 1974. #1:/Mullineaux D.R. Collection-Mount St. Helens*msh1974/mmdr0029 ID. Mount St. Helens Mullineaux, D.R. 29ct Mount St. Helens from south. Skamania County, Washington. September 18, 1974. #1:/Mullineaux D.R. Collection-Mount St. Helens*msh1974/mmdr0030 ID. Mount St. Helens Mullineaux, D.R. 30ct View of Dogs Head and summit of Mount St. Helens from Timberline Loop. Skamania County, Washington. September 20, 1974. #1:/Mullineaux D.R. Collection-Mount St. Helens*msh1975/mmdr0031 ID. Mount St. Helens Mullineaux, D.R. 31ct Mount St. Helens from Spirit Lake. Skamania County, Washington. August, 1975. #1:/Mullineaux D.R. Collection-Mount St. Helens*msh1975/mmdr0033 ID. Mount St. Helens Mullineaux, D.R. 33ct Mount St. Helens from Spirit Lake. Skamania County, Washington. 1975. #1:/Mullineaux D.R. Collection-Mount St. Helens*msh1975/mmdr0035 ID. Mount St. Helens Mullineaux, D.R. 35ct North flank of Mount St. Helens, Forsyth Glacier and moraines. Skamania County, Washington. 1975. #1:/Mullineaux D.R. Collection-Mount St. Helens*msh1977/mmdr0036 ID. Mount St. Helens Mullineaux, D.R. 36ct Mount St. Helens from south. Skamania County, Washington. September 5, 1977. #1:/Mullineaux D.R. Collection-Mount St. Helens*msh/mmdr0037 ID. Mount St. Helens Mullineaux, D.R. 37ct Mount Rainier from Dogs Head, north side of Mount St. Helens. Spirit Lake in middle ground. Skamania, Lewis, and Pierce Counties, Washington.n.d. #1:/Mullineaux D.R. Collection-Mount St. Helens*msh/mmdr0038 ID. Mount St. Helens Mullineaux, D.R. 38 Mount Rainier from northeast flank of Mount St. Helens. Spirit Lake in middle ground. Skamania, Lewis, and Pierce Counties, Washington. n.d. #1:/Mullineaux D.R. Collection-Mount St. Helens*msh1981/mmdr0041 ID. Mount St. Helens Mullineaux, D.R. 41ct Aerial view looking south into crater of ID. Mount St. Helens shows prominent growth of the new dome and post-eruption snow cover. Skamania County, Washington. May 8, 1981. Portion published on p. 98 in U.S. Geological Survey. Professional paper 1240-B. 1981. #1:/Alaska Glaciers/mmf00001 ID. Meier, M.F. 1 Alaska Glaciers. Chenaga Glacier, which is on the Kenai Peninsula, west of Chenaga. This is the largest outlet glacier of the Sargent Icefield. This very active tidewater glacier discharges large quantities of ice into an arm of Prince William Sound. The Glacier retreated rapidly early in the century and opened Nassau Fjord; in recent decades the glacier terminus has been stable. Mountain peaks, all less than 2,500 meters in altitude, rise as nunataks above the ice field. Farther inland, scattered glaciers, including the Wolverine, demonstrate by their higher altitude and smaller size the precipitation-shadow effects of the coastal ice fields. Wolverine Glacier is in the upper left background. Circa 1966. Figure 2, U.S. Geological Survey Professional Paper 715-A. #1:/Alaska Glaciers/mmf00002 ID. Meier, M.F. 2 Alaska Glaciers. Eastern Alaska Range. Gulkana Glacier is on the left. The peaks shown here are as much as 3,000 meters in altitude. The Richardson Highway follows the shore of Summit Lake (altitude 979 meters), well above the regional timberline (altitude 750 meters). A conspicuous trimline above the Gulkana Glacier terminus marks the 1875 ice position. Circa 1966. Figure 3, U.S. Geological Survey Professional Paper 715-A. #1:/Alaska Glaciers/mmf00006 ID. Meier, M.F. 6 Alaska Glaciers. Ice flow from four tributaries unites to form the main part of Gulkana Glacier, which is north of Paxson in the Alaska Range. Irregular and folded medial moraines suggest that this glacier surges. August 31, 1967. #1:/Miller C.D. Collection-Mount St. Helens*msh198003/mmil0001 ID. Mount St. Helens Miller, C.Dan 1ct Index slide. Mount St. Helens. Map by D.R. Crandell and D.R. Mullineaux. #1:/Miller C.D. Collection-Mount St. Helens*msh198003/mmil0002 ID. Mount St. Helens Miller, C.Dan 2ct Index slide. Mount St. Helens. Map by D.R. Crandell and D.R. Mullineaux. #1:/Frank D. Collection-Mount St. Helens*msh198003e/mmil0003 ID. Mount St. Helens Miller, C.Dan 3ct View from north of Mount St. Helens crater on day of first blast, March 27, 1980. Photo by D. Frank. Skamania County, Washington. #1:/Miller C.D. Collection-Mount St. Helens*msh198003e/mmil0004 ID. Mount St. Helens Miller, C.Dan 4ct View from north of phreatic eruption of Mount St. Helens. Skamania County, Washington. March 28, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198004/mmil0005 ID. Mount St. Helens Miller, C.Dan 5ct Phreatic eruption of Mount St. Helens from west. Skamania County, Washington. April 12, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198004/mmil0006 ID. Mount St. Helens Miller, C.Dan 6ct Phreatic eruption of Mount St. Helens from north. Skamania County, Washington. April 12, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198003e/mmil0007 ID. Mount St. Helens Miller, C.Dan 7ct Phreatic eruption of Mount St. Helens from northwest. Skamania County, Washington. March 30, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0008 ID. Mount St. Helens Miller, C.Dan 8ct Mount St. Helens summit crater from west. Skamania County, Washington. May 2, 1980. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh198004/mmil0010 ID. Mount St. Helens Miller, C.Dan 10ct Dave Johnston going into Mount St. Helens crater to sample lake (from west). Photo by R.P. Hoblitt. Skamania County, Washington. April 30, 1980. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh198004/mmil0011 ID. Mount St. Helens Miller, C.Dan 11ct Dave Johnston collecting sample from Mount St. Helens crater lake. 200 mm telephoto from west rim. Photo by R.P. Hoblitt. Skamania County, Washington. April 30, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198003e/mmil0012 ID. Mount St. Helens Miller, C.Dan 12ct Mount St. Helens summit graben and bulge from northeast. Skamania County, Washington. March 30, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0013 ID. Mount St. Helens Miller, C.Dan 13ct Mount St. Helens bulge from west. Skamania County, Washington. May 2, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0014 ID. Mount St. Helens Miller, C.Dan 14ct Mount St. Helens bulge from north. Skamania County, Washington. May 4, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0015 ID. Mount St. Helens Miller, C.Dan 15ct Mount St. Helens summit crater from north. Skamania County, Washington. May 7, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0016 ID. Mount St. Helens Miller, C.Dan 16ct North side of Mount St. Helens bulge. Skamania County, Washington. May 7, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0017 ID. Mount St. Helens Miller, C.Dan 17ct Mount St. Helens bulge from east. Skamania County, Washington. May 7, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0018 ID. Mount St. Helens Miller, C.Dan 18ct Surveying target in saddle on Goat Rocks, Mount St. Helens. Skamania County, Washington. May 2, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0020 ID. Mount St. Helens Miller, C.Dan 20ct "New" fumarole southeast of crater on upper Shoestring Glacier, Mount St. Helens. Skamania County, Washington. May 7, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0021 ID. Mount St. Helens Miller, C.Dan 21ct Beginning of second series of phreatic eruptions of Mount St. Helens. Skamania County, Washington. Evening of May 7, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0022 ID. Mount St. Helens Miller, C.Dan 22ct View from northwest of Floating Island flow and unstable north flank of Mount St. Helens. Skamania County, Washington. May 4, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0023 ID. Mount St. Helens Miller, C.Dan 23ct Locked gate on Highway 504, North Fork Toutle River, north of Mount St. Helens. Cowlitz County, Washington. May 3, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0024 ID. Mount St. Helens Miller, C.Dan 24ct View from northeast of Mount St. Helens crater with new ash fall. Skamania County, Washington. May 13. 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0025 ID. Mount St. Helens Miller, C.Dan 25ct View of Mount St. Helens summit crater from east. Shoestring Glacier fumarole on left. Skamania County, Washington. May 16, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0026 ID. Mount St. Helens Miller, C.Dan 26ct Drawing of Mount St. Helens bulge. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0027 ID. Mount St. Helens Miller, C.Dan 27ct Mount St. Helens summit from north-northeast. Skamania County, Washington. May 17, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0028 ID. Mount St. Helens Miller, C.Dan 28ct North points on top of Mount St. Helens bulge from southeast. Skamania County, Washington. May 16, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0029 ID. Mount St. Helens Miller, C.Dan 29ct Ice avalanche from Leshi Glacier traveled over top of north side of Sugar Bowl, Mount St. Helens. Skamania County, Washington. May 17, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0030 ID. Mount St. Helens Miller, C.Dan 30ct Mount St. Helens from the west. Skamania County, Washington. May 17, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0031 ID. Mount St. Helens Miller, C.Dan 31ct May 18, 1980 eruption of Mount St. Helens from south. Photo by J.G. Rosenbaum. Skamania County, Washington. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198005/mmil0032 ID. Mount St. Helens Miller, C.Dan 32ct May 18, 1980 eruption of Mount St. Helens from southwest. Photo by J.G. Rosenbaum. Skamania County, Washington. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198005/mmil0033 ID. Mount St. Helens Miller, C.Dan 33ct Nuee ardente from west, Mount St. Helens. Photo by J.G. Rosenbaum. Skamania County, Washington. May 18, 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198005/mmil0034 ID. Mount St. Helens Miller, C.Dan 34ct May 18, 1980 eruption of Mount St. Helens from west. Photo by J.G. Rosenbaum. Skamania County, Washington. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198005/mmil0035 ID. Mount St. Helens Miller, C.Dan 35ct May 18, 1980 eruption of Mount St. Helens from south. Photo by J.G. Rosenbaum. Skamania County, Washington. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198005/mmil0036 ID. Mount St. Helens Miller, C.Dan 36ct May 18, 1980 eruption of Mount St. Helens from west. Mount Adams in background. Photo by J.G. Rosenbaum. Yakima and Skamania Counties, Washington. May 19, 1980. #1:/Moore J.G. Collection-Mount St. Helens*msh198005/mmil0037 ID. Mount St. Helens Miller, C.Dan 37ct Map of eruptive products from Mount St. Helens. Map by J. Moore. #1:/Izett G. Collection-Mount St. Helens*msh198005/mmil0038 ID. Mount St. Helens Miller, C.Dan 38ct Map of tephra fall out from Mount St. Helens. Map by Glenn Izett. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0039 ID. Mount St. Helens Miller, C.Dan 39ct Spirit Lake, north of Mount St. Helens, from above Goat Rocks. Skamania County, Washington. May 4, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0040 ID. Mount St. Helens Miller, C.Dan 40ct North-northwest of Spirit Lake, north of Mount St. Helens. Skamania County, Washington. May 23, 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198005/mmil0041 ID. Mount St. Helens Miller, C.Dan 41ct North-northwest of ridge dividing east and west parts of Spirit Lake, north of Mount St. Helens. Photo by J. Rosenbaum. Skamania County, Washington. May 20 , 1980 #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0042 ID. Mount St. Helens Miller, C.Dan 42ct North part of west Spirit Lake (Bear Cove) before May 18 eruption of Mount St. Helens. View to north. Skamania County, Washington. May 17, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0043 ID. Mount St. Helens Miller, C.Dan 43ct View to north of "finger" in middle of Spirit Lake after May 18 eruption of Mount St. Helens. North shore of east lobe of lake in center. Skamania County, Washington. May 22, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0044 ID. Mount St. Helens Miller, C.Dan 44ct St. Helens Lake and Coldwater Peak (left) after May 18 eruption of Mount St. Helens. View toward the north. Skamania County, Washington. May 20, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0045 ID. Mount St. Helens Miller, C.Dan 45ct "Before" picture of north side of Mount St. Helens. Skamania County, Washington. May 4, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0046 ID. Mount St. Helens Miller, C.Dan 46ct Pumice flows from north after May 18 eruption of Mount St. Helens. Skamania County, Washington. May 23, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0047 ID. Mount St. Helens Miller, C.Dan 47ct View to northwest from Mount St. Helens summit. North Fork Toutle Valley and Coldwater II and Floating Island flow. Skamania County, Washington. April 30, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0048 ID. Mount St. Helens Miller, C.Dan 48ct Coldwater II Ridge. View to west. Pumice flows from Mount St. Helens. Skamania County, Washington. May 23, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0049 ID. Mount St. Helens Miller, C.Dan 49ct View toward north of North Fork Toutle, Highway 504, Coldwater Ridge, and Coldwater II observation station at top center before May 18 eruption of Mount St. Helens. Skamania County, Washington. May 4, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0050 ID. Mount St. Helens Miller, C.Dan 50ct View to west of Coldwater II observation station after May 18 eruption of Mount St. Helens. Skamania County, Washington. May 24, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0051 ID. Mount St. Helens Miller, C.Dan 51ct Upper Coldwater Creek more than 15 km north of Mount St. Helens summit. Skamania County, Washington. May 24, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0052 ID. Mount St. Helens Miller, C.Dan 52ct Blast area near margin about 20 km from Mount St. Helens summit to north. Note clear cut. Skamania County, Washington. May 20, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0053 ID. Mount St. Helens Miller, C.Dan 53ct Margin of blast near Camp Baker, North Fork Toutle River after May 18 eruption of Mount St. Helens. Cowlitz County, Washington. May 20, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198004/mmil0054 ID. Mount St. Helens Miller, C.Dan 54ct View from Coldwater I observation post before eruptions of Mount St. Helens. Cowlitz County, Washington. April 11, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0055 ID. Mount St. Helens Miller, C.Dan 56ct View to east of Coldwater II Ridge from Coldwater I after May 18 eruption of Mount St. Helens. Cowlitz and Skamania Counties, Washington. May 23, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0057 ID. Mount St. Helens Miller, C.Dan 57ct View down (west) North Fork Toutle River of Mount St. Helens debris avalanche deposit. Cowlitz County, Washington. May 20, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0058 ID. Mount St. Helens Miller, C.Dan 58ct View to north of mouth of Coldwater Creek from top of Mount St. Helens debris avalanche deposit. Cowlitz County, Washington. May 24, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0059 ID. Mount St. Helens Miller, C.Dan 59ct On surface of Mount St. Helens debris avalanche deposit. Cowlitz County, Washington. May 24, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0060 ID. Mount St. Helens Miller, C.Dan 60ct Ice block in Mount St. Helens debris avalanche deposit. Cowlitz County, Washington. May 24, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0061 ID. Mount St. Helens Miller, C.Dan 61ct North Fork Toutle River after May 18 eruption of Mount St. Helens. View to the east. Cowlitz and Skamania Counties, Washington. May 20, 1980. #1:/Crandell D.R. Collection-Mount St. Helens*msh198005/mmil0062 ID. Mount St. Helens Miller, C.Dan 62ct North Toutle Bridge near A1 Rought Park before May 18 eruption of Mount St. Helens. View to north. Photo by D.R. Crandell. Cowlitz County, Washington. April, 1980. #1:/Crandell D.R. Collection-Mount St. Helens*msh198005/mmil0063 ID. Mount St. Helens Miller, C.Dan 63ct "Al Rought" bridge after May 18 eruption of Mount St. Helens. Photo by D.R. Crandell. Cowlitz County, Washington. May 24, 1980. #1:/Crandell D.R. Collection-Mount St. Helens*msh198005/mmil0064 ID. Mount St. Helens Miller, C.Dan 64ct House along North Fork Toutle River, north of Mount St. Helens. Note "high water" mark. Photo by D.R. Crandell. Cowlitz County, Washington. May 1980. #1:/Crandell D.R. Collection-Mount St. Helens*msh198004/mmil0065 ID. Mount St. Helens Miller, C.Dan 65ct Toutle River Bridge at Gilmore Corners before May 18 eruption of Mount St. Helens. View to west. Photo by D.R. Crandell. Cowlitz County, Washington. April 1980. #1:/Crandell D.R. Collection-Mount St. Helens*msh198005/mmil0066 ID. Mount St. Helens Miller, C.Dan 66ct Toutle River Bridge at Gilmore Corners after May 18 eruption of Mount St. Helens. Photo by D.R. Crandell. Cowlitz County, Washington. May 24, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0067 ID. Mount St. Helens Miller, C.Dan 67ct Toutle River Bridge after May 18 eruption of Mount St. Helens. Cowlitz County, Washington. May 20, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0068 ID. Mount St. Helens Miller, C.Dan 68ct Flooding along Cowlitz River, north of Mount St. Helens. Cowlitz County, Washington. May 20, 1980. #1:/Moore J.G. Collection-Mount St. Helens*msh198005/mmil0069 ID. Mount St. Helens Miller, C.Dan 69ct Map of features and deposits of Mount St. Helens. Map by J. Moore #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0070 ID. Mount St. Helens Miller, C.Dan 70ct Temporary location on Mount St. Helens May 18 pumice flows north of amphitheater. Skamania County, Washington. May 23, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0071 ID. Mount St. Helens Miller, C.Dan 71ct View to west of Mount St. Helens pumice flows and temperature site. Note geologists and fumaroles. Skamania County, Washington. May 23, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0072 ID. Mount St. Helens Miller, C.Dan 72ct View to west of Mount St. Helens pumice flows in upper North Toutle Drainage. Cowlitz and Skamania Counties, Washington. May 23, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0073 ID. Mount St. Helens Miller, C.Dan 73ct Rick Hoblitt looking at pumice block on surface of Mount St. Helens pumice flows. North side. Skamania County, Washington. May 23, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0074 ID. Mount St. Helens Miller, C.Dan 74ct Hot mudflows (brown) and pumice flow (white) from Mount St. Helens on Pine Creek fan, south east side. Skamania County, Washington. May 20, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0076 ID. Mount St. Helens Miller, C.Dan 76ct Installing steel pipe and temperature probe in Mount St. Helens pumice flow on southeast side. Skamania County, Washington. May 22, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0077 ID. Mount St. Helens Miller, C.Dan 77ct Mount St. Helens pumice flow on southeast side. Temperature of pumice flow here was about 150 degrees C. Skamania County, Washington. May 22, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0079 ID. Mount St. Helens Miller, C.Dan 79ct Phreatic explosions in Mount St. Helens pumice flows. View to east Skamania County, Washington. May 23, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0080 ID. Mount St. Helens Miller, C.Dan 80ct View to west of toes of Mount St. Helens May 18 pumice flows banked against Coldwater Ridge. Cowlitz and Skamania Counties, Washington. May 23, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005e/mmil0081 ID. Mount St. Helens Miller, C.Dan 81ct View of Mount St. Helens from the southwest on March 30, 1980. Skamania County, Washington. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0082 ID. Mount St. Helens Miller, C.Dan 82ct Volcanic hazards map. Mount St. Helens. Map by D.R. Crandell and D.R. Mullineaux. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0083 ID. Mount St. Helens Miller, C.Dan 83ct Volcanic hazards map. Mount St. Helens. Map by D.R. Crandell and D.R. Mullineaux. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0084 ID. Mount St. Helens Miller, C.Dan 84ct View from north of "bulge" on north flank of Mount St. Helens. Skamania County, Washington. May 4, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0085 ID. Mount St. Helens Miller, C.Dan 85ct U.S. Geological Survey personnel using geodimeter to measure deformation of north flank of Mount St. Helens. Skamania County, Washington. May 4, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0086 ID. Mount St. Helens Miller, C.Dan 86ct Phreatic explosion of Mount St. Helens, from west; primarily steam. Skamania County, Washington. May 7, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0087 ID. Mount St. Helens Miller, C.Dan 87ct Phreatic explosion of Mount St. Helens; from the southwest. Ash and steam. Skamania County, Washington. May 7, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh1979/mmil0090 ID. Mount St. Helens Miller, C.Dan 90ct Sketch of north side of Mount St. Helens. Skamania County, Washington. Summer 1979. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0091 ID. Mount St. Helens Miller, C.Dan 91ct Sketch of north side of Mount St. Helens. Skamania County, Washington. May 15, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0092 ID. Mount St. Helens Miller, C.Dan 92ct Sketch of north side of Mount St. Helens. Skamania County, Washington. May 26, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0093 ID. Mount St. Helens Miller, C.Dan 93ct Photomicrograph of pumiceous ash from Mount St. Helens collected in Denver, Colorado. May 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0095 ID. Mount St. Helens Miller, C.Dan 95ct View to north of Spirit Lake from within amphitheater after May 18 eruption of Mount St. Helens. Skamania County, Washington. May 23, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0096 ID. Mount St. Helens Miller, C.Dan 96ct View to west of Spirit Lake after May 18 eruption of Mount St. Helens. Skamania County, Washington. May 23, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0100 ID. Mount St. Helens Miller, C.Dan 100ct Margin of blast zone, south side of North Fork Toutle River. Cowlitz County, Washington. May 20, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0102 ID. Mount St. Helens Miller, C.Dan 102ct Taking temperatures in Mount St. Helens blast deposit in South Coldwater Creek. Skamania County, Washington. May 20, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0104 ID. Mount St. Helens Miller, C.Dan 104ct View of Camp Baker and mudflows in North Fork Toutle River after May 18 eruption of Mount St. Helens. Cowlitz County, Washington. May 20, 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh198005/mmil0105 ID. Mount St. Helens Miller, C.Dan 105ct View to east of upper North Fork Toutle drainage with phreatic explosion in pumice flows of May 18 eruption of Mount St. Helens. Skamania County, Washington. May 23, 1980. #1:/Mount St. Helens*msh198005/mmol0001 ID. Mount St. Helens - mmol, 1 Mount St. Helens, before and after the eruption of May 18, 1980. Black and white copy of painting by Molenaar.U.S. Geological Survey. Skamania County, Washington. #1:/Mount St. Helens*msh198005/mmol0002 ID. Mount St. Helens - mmol, 2 Mount St. Helens after the eruption of May 18, 1980. Black and white copy of painting by Molenaar. U.S. Geological Survey. Skamania County, Washington. #1:/Mount St. Helens*msh198005/mmol0003 ID. Mount St. Helens - mmol, 3 View from northwest of Mount St. Helens after the May 18, 1980 eruption. Black and white copy of painting by Molenaar.U.S. Geological Survey. U.S. Geological Survey. Skamania County, Washington. #1:/Mudge M.R. Collection/mmr00010 ID. Mudge, M.R. 10ct Sandstone concretions from the Pony Creek Channel. Pony Creek shale member of Wood Siding formation Pennsylvanian. NE 1/4 NW 1/4 sec. 19, T. 7 S., R. 11 E. Pottawattamie County, Kansas. 1951. #1:/Glacier National Park/mmr00019 ID. Mudge, M.R. 19 Glacier National Park, Montana. Northeast of the Lewis thrust at the south end of the park. The light gray band in the middle is deformed Altyn Formation, which overlies the Lewis thrust. The Greyson Formation overlies the Altyn. Folded and faulted Cretaceous rocks underlie the Lewis thrust. Circa 1970. Figure 4, U.S. Geological Survey Professional Paper 1174. #1:/Mudge M.R. Collection/mmr00052 ID. Mudge, M.R. 52ct Glacial (diabase) boulder on Diversion Ridge south of Sun River. Note scour due to wind erosion. Boulder sits on Rierdon shale. Hammer for scale. Sun River Canyon project. Lewis and Clark County, Montana. July 1957. #1:/Glacier National Park/mmr00168 ID. Mudge, M.R. 168 Glacier National Park, Montana. Lewis thrust fault above folded and faulted Lower Cretaceous rocks south of Little Dog Mountain. Circa 1970. Figure 5, U.S. Geological Survey Professional Paper 1174. #1:/Glacier National Park/mmr00169 ID. Mudge, M.R. 169 Glacier National Park, Montana. Lewis thrust fault at the south end of the park. Note the small imbricate thrust that repeats the Altyn and Greyson Formations (light and dark units, respectively). Circa 1970. Figure 6, U.S. Geological Survey Professional Paper 1174. #1:/Glacier National Park/mmr00170 ID. Mudge, M.R. 170 Glacier National Park, Montana. Lewis thrust at the base of deformed Altyn (light) and Greyson (dark) Formations at the south end of the park. Thrust- faulted and folded Cretaceous rocks are below the Lewis but are covered here by talus. Note the easterly-dipping, low-angle normal faults, one of which extends to the Lewis. Circa 1970. Figure 7, U.S. Geological Survey Professional Paper 1174. #1:/Mudge M.R. Collection/mmr00208 ID. Mudge, M.R. 208ct Rockfall avalanche deposit just east of Goat Mountain. Sun River Canyon project. Lewis and Clark County, Montana. 1962. #1:/Mudge M.R. Collection/mmr00210 ID. Mudge, M.R. 210ct Frost stripes on top of Castle Reef mountain. Sun River Canyon Project. Teton County, Montana. 1962. #1:/Mudge M.R. Collection/mmr00232 ID. Mudge, M.R. 232ct Glacial till above Bull Lake soil on Bull Lake gravel. Sun River north of Augusta. Pick for scale. Sun River Canyon project. Lewis and Clark County, Montana. 1963. #1:/Mudge M.R. Collection/mmr00267 ID. Mudge, M.R. 267ct Anticline in Kootenai Formation in irrigation ditch south of Sun River. Lewis and Clark County, Montana. 1964. #1:/Mudge M.R. Collection/mmr00311 ID. Mudge, M.R. 311ct Stromatolite specimen from Helena Dolomite. Sun River Canyon project. Montana. 1965. #1:/Mudge M.R. Collection/mmr00328 ID. Mudge, M.R. 328ct Fenster in cirque, west side of Sawtooth Ridge. Sun River Canyon Project. Lewis and Clark County, Montana. 1966. #1:/Mudge M.R. Collection/mmr00339 ID. Mudge, M.R. 339ct Aerial view anticline in Mississippian rocks, South Fork Deep Creek. Teton County, Montana. 1966. #1:/Mudge M.R. Collection/mmr00369 ID. Mudge, M.R. 369ct View northwest of south end of Scapegoat Mountain; shows folds in strata. Scapegoat Wilderness. Lewis and Clark County, Montana. 1970. #1:/Mudge M.R. Collection/mmr00406 ID. Mudge, M.R. 406ct Tertiary(?) dike intruding Precambrian (700 m.y.) diorite sill.U.S. Highway roadcut 1 mile east of Rogers Pass. Lewis and Clark County, Montana. August 1975. #1:/Mudge M.R. Collection/mmr00428 ID. Mudge, M.R. 428ct Side of railroad cut, about 3 miles west of East Glacier Park. Drag fold in Kootenai Formation. Pondera County, Montana. August 1976. #1:/Mudge M.R. Collection/mmr00444 ID. Mudge, M.R. 444ct Aerial view looking north, from vicinity of forks of Willow Creek, of Teton Anticline. Teton River near center of view. Teton County, Montana. August 1977. #1:/Mudge M.R. Collection/mmr00481 ID. Mudge, M.R. 481ct Oblique aerial view northwest, Middle Fork Flathead River near Winter Creek. Sequence beginning upper left: Cambrian, Belt Supergroup, Eldorado thrust plate, Mississippian, Lower Cretaceous. Flathead County, Montana. 1979. #1:/Mudge M.R. Collection/mmr00482 ID. Mudge, M.R. 482ct Oblique aerial view, northwest of Straight and Wood Creeks. Sequence beginning at top: Hoadley Formation, Cambrian, Lewis thrust block, Cambrian, Belt Supergroup, Eldorado thrust plate, Mississippian. Lewis and Clark County, Montana. 1979. #1:/Mudge M.R. Collection/mmr00490 ID. Mudge, M.R. 490ct Oblique aerial view to northwest along Allan Mountain. In foreground, from left to right, Mississippian thrust over Cretaceous. Lewis and Clark County, Montana. 1979. #1:/Mudge M.R. Collection/mmr00494 ID. Mudge, M.R. 494ct Oblique aerial view west, on south side of Moose Creek, showing Chinese Wall in distance. In foreground, Mount Shields Formation and Lewis thrust block overlie Devonian rocks; Cambrian rocks at right. Lewis and Clark County, Montana. 1979. #1:/Mudge M.R. Collection/mmr00534 ID. Mudge, M.R. 534ct Aerial view northwest, of fenster in Route Creek, which places Mississippian rocks onto lower Cretaceous Kootenai Formation. Devonian rocks have been thrust on Mississippian rocks. All have been folded. Bob Marshall Wilderness Area. Our Lakes quadrangle. Lewis and Clark County, Montana.n.d. #1:/Mount St. Helens*msh198007/mmtd0001 ID. Mount St. Helens McKnight, D.C. 1ct Ashfall area of May 18 eruption of Mount St. Helens on road to Trout Lake, approximately 30 miles northeast of Mount St. Helens. Heavy ash deposit on roadside and signpost. Lewis County, Washington. July 16, 1980. #1:/Mount St. Helens*msh198007/mmtd0002 ID. Mount St. Helens McKnight, D.C. 2ct Ashfall area of May 18 eruption of Mount St. Helens on road to Trout Lake, approximately 30 miles northeast of Mount St. Helens. Ash cloud behind car. Lewis County, Washington. July 16, 1980. #1:/Mount St. Helens*msh198007/mmtd0003 ID. Mount St. Helens McKnight, D.C. 3ct Ashfall area of May 18 eruption of Mount St. Helens on road to Trout Lake, approximately 30 miles northeast of Mount St. Helens. Ash deposited on Douglas fir trees. Lewis County, Washington. July 16, 1980. #1:/Mount St. Helens*msh198007/mmtd0004 ID. Mount St. Helens McKnight, D.C. 4ct Ashfall area of May 18 eruption of Mount St. Helens on road to Trout Lake, approximately 30 miles northeast of Mount St. Helens. Ash deposited on Douglas fir trees. Lewis County, Washington. July 16, 1980. #1:/Mount St. Helens*msh198007/mmtd0005 ID. Mount St. Helens McKnight, D.C. 5ct Ashfall area of May 18 eruption of Mount St. Helens on road to Trout Lake, approximately 30 miles northeast of Mount St. Helens. Ash deposited on Douglas fir trees. Lewis County, Washington. July 16, 1980. #1:/Mount St. Helens*msh198007/mmtd0006 ID. Mount St. Helens McKnight, D.C. 6ct Ashfall area of May l8 eruption of Mount St. Helens at Walupt Lake picnic area, approximately 35 miles northeast of Mount St. Helens. Ash deposited on picnic table. Yakima County, Washington. July 16, 1980. #1:/Mount St. Helens*msh198007/mmtd0007 ID. Mount St. Helens McKnight, D.C. 7ct Ashfall area of May 18 eruption of Mount St. Helens at Walupt Lake picnic area. Shore of Lake Walupt showing ash washing into lake. Yakima County, Washington. July 16, 1980. #1:/Mount St. Helens*msh198007/mmtd0008 ID. Mount St. Helens McKnight, D.C. 8ct Ashfall area of May 18 eruption of Mount St. Helens on Columbia River at Vantage, Washington, showing bridge where Interstate 90 crosses Columbia River and ash cloud being blown from the west bank to the east bank of the river. Kittitas and Grant Counties, Washington. July 17, 1980. #1:/Mount St. Helens*msh198007/mmtd0009 ID. Mount St. Helens McKnight, D.C. 9ct Ashfall area of May 18 eruption of Mount St. Helens. Ash deposited on east bank of Columbia River. Grant County, Washington. July 17, 1980. #1:/Mount St. Helens*msh198009/mmtd0010 ID. Mount St. Helens McKnight, D.C. 10ct Mount St. Helens blast zone. New growth of fireweed on periphery of blast zone near Elk Creek. Cowlitz County, Washington. September 10, 1980. #1:/Mount St. Helens*msh198009/mmtd0011 ID. Mount St. Helens McKnight, D.C. 11ct Spirit Lake, taken from debris island looking south toward Mount St. Helens. Jerry Franklin, U.S. Forest Service, and Diane McKnight, U.S. Geological Survey, collecting water samples from Spirit Lake. Blown down logs on debris island and floating in Spirit Lake. Skamania County, Washington. September 11, 1980. #1:/Mount St. Helens*msh198009/mmtd0012 ID. Mount St. Helens McKnight, D.C. 12ct Spirit Lake, taken from debris island looking south toward Mount St. Helens. Jerry Franklin, U.S. Forest Service, and Diane McKnight, U.S. Geological Survey, collect water samples from Spirit Lake. Blown down logs on debris island and floating in Spirit Lake. Skamania County, Washington. September 11, 1980. #1:/Mount St. Helens*msh198009/mmtd0013 ID. Mount St. Helens McKnight, D.C. 13ct Spirit Lake, taken from debris island looking south toward Mount St. Helens. Diane McKnight, U.S. Geological Survey, collecting water sample from Spirit Lake. Blown down logs on debris island and floating in Spirit Lake. Skamania County, Washington. September 11, 1980. #1:/Mount St. Helens*msh198009/mmtd0014 ID. Mount St. Helens McKnight, D.C. 14ct Spirit Lake, taken from debris island looking south toward Mount St. Helens. Estella Leopold, University of Washington, preparing equipment to sample algae in Spirit Lake. Blown down logs on debris island and floating in Spirit Lake. Skamania County, Washington. September 11, 1980. #1:/Mount St. Helens*msh198009/mmtd0015 ID. Mount St. Helens McKnight, D.C. 15ct Spirit Lake, north of Mount St. Helens, taken from debris island looking north. Fallen logs in foreground and devastated slopes in background. Skamania County, Washington. September 11, 1980. #1:/Mount St. Helens*msh198009/mmtd0016 ID. Mount St. Helens McKnight, D.C. 16ct Spirit Lake, north of Mount St. Helens, taken from debris island looking northeast. Fallen logs in foreground and devastated slopes in background. Skamania County, Washington. September 11, 1980. #1:/Mount St. Helens*msh198009/mmtd0018 ID. Mount St. Helens McKnight, D.C. 18ct Spirit Lake, north of Mount St. Helens, taken from debris island looking east. Fallen logs in foreground and devastated slopes in background. Skamania County, Washington. September 11, 1980. #1:/Mount St. Helens*msh1981/mmtd0022 ID. Mount St. Helens McKnight, D.C. 22ct Castle Lake, formed by damming of Castle Creek by debris flow from May 18 eruption of Mount St. Helens. Devastated slopes and log jam in far corner of lake. Cowlitz County, Washington. May 1, 1981. #1:/Mount St. Helens*msh1981/mmtd0023 ID. Mount St. Helens McKnight, D.C. 23ct Up the slope from shore of Castle Lake, northwest of Mount St. Helens. Erosion of ash deposit by snowmelt runoff. Cowlitz County, Washington. May 1, 1981. #1:/Mount St. Helens*msh1981/mmtd0024 ID. Mount St. Helens McKnight, D.C. 24ct Robert Wissmar, University of Washington, and Diane McKnight, U.S. Geological Survey, collecting water sample from tree stump along the shore of Castle Lake. northwest of Mount St. Helens. Cowlitz County, Washington. May 1, 1981. #1:/Mount St. Helens*msh1981/mmtd0025 ID. Mount St. Helens McKnight, D.C. 25ct Aerial view of Mount St. Helens debris flow in the Toutle River Basin. Erosion from snowmelt and several small brightly colored (turquoise, yellow, brown) pools of water. Cowlitz County, Washington. May 1, 1981. #1:/Mount St. Helens*msh1981/mmtd0026 ID. Mount St. Helens McKnight, D.C. 26ct Aerial view of Mount St. Helens debris flow in the Toutle River Basin. Erosion from snowmelt and several small brightly colored (turquoise, yellow, brown) pools of water. Cowlitz County, Washington. May 1, 1981. #1:/Mount St. Helens*msh1981/mmtd0027 ID. Mount St. Helens McKnight, D.C. 27ct Aerial view of logging operation near Toutle River, northwest of Mount St. Helens, near retaining structure. Cowlitz County, Washington. May 1, 1981. #1:/Meinzer Collection/moe00171 ID. Meinzer, O.E. 171 Panorama with moe0171a and moe0171b. Guantanamo bay and U.S. Naval Station from monument at Fishermans Point. Orienta Provence, Cuba. ca 1920. #1:/Meinzer Collection/moe0171a ID. Meinzer, O.E. 171a Panorama with moe00171 and moe0171b. Guantanamo bay and U.S. Naval Station from monument at Fishermans Point. Orienta Provence, Cuba. ca 1920. #1:/Meinzer Collection/moe0171b ID. Meinzer, O.E. 171b Panorama with moe00171 and moe0171a. Guantanamo bay and U.S. Naval Station from monument at Fishermans Point. Orienta Provence, Cuba. ca 1920. #1:/Meinzer Collection/moe00172 ID. Meinzer, O.E. 172 Estacion de Los Rurales at San Antonio. La Bandera Este Medio Asta. Orienta Provence, Cuba. ca 1920. #1:/Meinzer Collection/moe00173 ID. Meinzer, O.E. 173 Typical homes in San Antonio. Orienta Provence, Cuba. ca 1920. #1:/Meinzer Collection/moe00174 ID. Meinzer, O.E. 174 Typical house in Yacabo Arriba. Noon on Sunday. 1/25/16. Orienta Provence, Cuba. ca 1920. #1:/Meinzer Collection/moe00175 ID. Meinzer, O.E. 175 Mountains north of Yacabo Abajo. View from 200 foot terrace west of Yacabo River. Orienta Provence, Cuba. ca 1920. #1:/Meinzer Collection/moe00176 ID. Meinzer, O.E. 176 Mountains between Yacabo and Imias Rivers, probably in vicinity of Sabanalamar. Orienta Provence, Cuba. ca 1920. #1:/Meinzer Collection/moe00177 ID. Meinzer, O.E. 177 Mountains north of Baitliquiri. Orienta Provence, Cuba. ca 1920. #1:/Meinzer Collection/moe00178 ID. Meinzer, O.E. 178 Trail leading through woods near Guantanamo Naval Station. Orienta Provence, Cuba. ca 1920. #1:/Meinzer Collection/moe00200 ID. Meinzer, O.E. 200 Rapids on the Yateras River a short distance below Yuraguana. Orienta Provence, Cuba. ca 1920. #1:/Meinzer Collection/moe00201 ID. Meinzer, O.E. 201 Yacabo River several miles above its mouth. Orienta Provence, Cuba. ca 1920. #1:/Meinzer Collection/moe00202 ID. Meinzer, O.E. 202 Metamorphic Rock (Basal Complex) at small beach east of Cuzo Beach, showing cleavage planes. Orienta Provence, Cuba. ca 1920. #1:/Meinzer Collection/moe00203 ID. Meinzer, O.E. 203 Exposure of Metamorphic Rock (Basal Complex) on the U.S. Reservation, Guantanamo. Orienta Provence, Cuba. ca 1920. #1:/Meinzer Collection/moe00204 ID. Meinzer, O.E. 204 Exposure of Conglomerate, along trail west of Ocujal Spring. Orienta Provence, Cuba. ca 1920. #1:/Meinzer Collection/moe00205 ID. Meinzer, O.E. 205 Conglomerate at the target range, containing sandstone dike. Orienta Provence, Cuba. ca 1920. #1:/Meinzer Collection/moe00206 ID. Meinzer, O.E. 206 Mogote Peak from tidal flat on east side, showing limestone ledges. Orienta Provence, Cuba. ca 1920. #1:/Meinzer Collection/moe00207 ID. Meinzer, O.E. 207 Escarpement showing what appears to be a landslide due to shale underlying limestone, in range next north of low Melones Mountains. Orienta Provence, Cuba. ca 1920. #1:/Meinzer Collection/moe00208 ID. Meinzer, O.E. 208 Exposure of limestone in saddle on east side of La Plata Mountain, covered with Yuraguana Trees, which love limestone soils. Orienta Provence, Cuba. ca 1920. #1:/Meinzer Collection/moe00209 ID. Meinzer, O.E. 209 Outcrop of Late Eocene or Early Oligocene Limestone on east side of Yatoras River, above El Jigue. Orienta Provence, Cuba. ca 1920. #1:/Meinzer Collection/moe00210 ID. Meinzer, O.E. 210 Flexure in limestone and shale strata on west side of Yateras River about 2 miles south of Yuraguana. Orienta Provence, Cuba. ca 1920. #1:/Meinzer Collection/moe00211 ID. Meinzer, O.E. 211 Flexure in limestone and shale strata on west side of Yateras River about 2 miles south of Yuraguana. Orienta Provence, Cuba. ca 1920. #1:/Meinzer Collection/moe00212 ID. Meinzer, O.E. 212 Coast, looking westward from the gravel beach bar at mouth of Imias River, showing the 40 foot, 200 foot, 500 foot, and 750 foot terraces. Orienta Provence, Cuba. ca 1920. #1:/Meinzer Collection/moe00213 ID. Meinzer, O.E. 213 Coast, looking eastward from mouth of Macambo River, 40 foot terrace in foreground, 200 foot and 500 foot terraces in background. Orienta Provence, Cuba. ca 1920. #1:/Meinzer Collection/moe00214 ID. Meinzer, O.E. 214 Looking northward from coast near Macambo River, Ramon Castro, with horses and pack mule, is on the 40 foot terrace, 200 and 500 foot terraces in background (500 foot terrace at the horizon.) Orienta Provence, Cuba. ca 1920. #1:/Meinzer Collection/moe00215 ID. Meinzer, O.E. 215 The 200, 500 and 750 foot terraces from the tidal flat adjacent to Baitiquiri Bay. Orienta Provence, Cuba. ca 1920. #1:/Meinzer Collection/moe00216 ID. Meinzer, O.E. 216 Baitiquiri Bay, showing 200 and 500 foot terraces. Orienta Provence, Cuba. ca 1920. #1:/Meinzer Collection/moe00217 ID. Meinzer, O.E. 217 Mountains east of Guantanamo Bay, showing the 40 and 125 foot terraces and an indistinct terrace at a higher level. View taken from lauch between Boqueron and Glorietta. Orienta Provence, Cuba. ca 1920. #1:/Meinzer Collection/moe00218 ID. Meinzer, O.E. 218 125 foot terrace, from Glorietta. The 40 foot terrace and a terrace at about 400 ft. A.T. also show faintly. Orienta Provence, Cuba. ca 1920. #1:/Meinzer Collection/moe00219 ID. Meinzer, O.E. 219 The 500 foot terrace on west side of Yacabo River, showing unconformity between the bevelled tilted strata and the overlying horizonal beds of terrace limestone. Orienta Provence, Cuba. ca 1920. #1:/Meinzer Collection/moe00220 ID. Meinzer, O.E. 220 The 200 foot terrace on wst side of Yacabo River, showing unconformity between the bevelled tilted strata and the overlying horizonal beds of terrace limestone. Orienta Provence, Cuba. ca 1920. #1:/Meinzer Collection/moe00221 ID. Meinzer, O.E. 221 Hospital Cay, showing the 40 foot terrace. Orienta Provence, Cuba. ca 1920. #1:/Meinzer Collection/moe00222 ID. Meinzer, O.E. 222 The 40 foot terrace and sea cliff near east boundary of U.S. Reservation. Orienta Provence, Cuba. ca 1920. #1:/Meinzer Collection/moe00223 ID. Meinzer, O.E. 223 Sea Cliff near east boundary of U.S. Reservation showing unconformity between basal complex and overlying terrace limestone. Orienta Provence, Cuba. ca 1920. #1:/Meinzer Collection/moe00224 ID. Meinzer, O.E. 224 40 foot terrace at east boundary of U.S. Reservation, showing unconformity between basal complex and terrace limestone. Orienta Provence, Cuba. ca 1920. #1:/Meinzer Collection/moe00225 ID. Meinzer, O.E. 225 Forty foot terrace at Windmill Beach, unconformity between basal complex and terrace limestone. Cactus on the terrace. Orienta Provence, Cuba. ca 1920. #1:/Meinzer Collection/moe0231a ID. Meinzer, O.E. 231a Panorama. West Cuzco Valley, showing flat part underlain by water bearing gravel. Orienta Provence, Cuba. ca 1920. #1:/Meinzer Collection/moe00232 ID. Meinzer, O.E. 232 Gang of Cuban Workman employee to dig and test wells on the U.S. Reservation, Guantanamo Bay. Orienta Provence, Cuba. ca 1920. #1:/Meinzer Collection/moe00239 ID. Meinzer, O.E. 239 Mountains west of Little Bitterroot Valley, Horse Plans Quad., showing clump of trees indication of springs at mouth of canyon. There is no Alluvian Fan. Flathead County, Montana. 1920. #1:/Meinzer Collection/moe00240 ID. Meinzer, O.E. 240 Lake beds in Little Bitterroot Valley, Horse Plans Quad., showing stratification. Flathead County, Montana. 1920. #1:/Craters of the Moon National Monument/moe00273 ID. Meinzer, O.E. 273 Craters of the Moon National Monument, Idaho. Picturesque camp made by a lone geologist on the cinders of Inferno.O.E. Meinzer visited the Monument in June 1921 and made preliminary plans for a geological survey of the area. #1:/Mullineaux D.R. Collection-Mount St. Helens*msh1979/mpp00001 ID. Mount St. Helens - PP 1250 1 Mount St. Helens from the northeast, showing relatively smooth, uneroded profile prior to 1980, the fan of debris that dammed preexisting valleys to form Spirit Lake, and the following plug domes that studded its northern flank Dogs Head (D), Sugar Bowl (S), Goat Rocks (G). Photo by D.R. Mullineaux. Skamania County, Washington.n.d. Figure 3, U.S. Geological Survey Professional Paper 1250. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1979/mpp00002 ID. Mount St. Helens - PP 1250 2 Aerial view of Mount St. Helens from the southwest. Dark andesite flows of Lakama age include a lava-flow complex on the southeast flank of the volcano and single flows on the southwest flank. Dacite of the summit dome forms the slopes above the lava flows. Photo by R.P. Hoblitt. Skamania County, Washington. 1979. Figure 4, U.S. Geological Survey Professional Paper 1250. #1:/Frank D. Collection-Mount St. Helens*msh198003e/mpp00003 ID. Mount St. Helens - PP 1250 3 Summit area of Mount St. Helens. Aerial view on the afternoon of March 27 looking east, showing newly formed crater, swath of dark new ash mainly to southeast of new crater, an east-west fault across middle of summit area, and an uplift or bulge on upper north flank of the volcano. Photo by David Frank. Skamania County, Washington. March 27, 1980. Portion of Figure 6, U.S. Geological Survey Professional Paper 1250. #1:/Christiansen R.L. Collection-Mount St. Helens*msh198004/mpp00004 ID. Mount St. Helens - PP 1250 4 Summit area of Mount St. Helens. Aerial view, April 12, looking southwest, showing enlargement and coalescence of crater complex and further increase in relief on east-west fault. Photo by R.L. Christiansen. Skamania County, Washington. April 12, 1980. Portion of Figure 7, U.S. Geological Survey Professional Paper 1250. #1:/Moore J.G. Collection-Mount St. Helens*msh198003e/mpp00005 ID. Mount St. Helens - PP 1250 5 Aerial view of a fingerlike ash column in initial burst of a steam-blast eruption from one of the summit craters of Mount St. Helens. Height of visible part of the column is approximately 50 m. Photo by James G. Moore. Skamania County, Washington. March 28, 1980. Portion of Figure 8, U.S. Geological Survey Professional Paper 1250. #1:/Christiansen R.L. Collection-Mount St. Helens*msh198005/mpp00006 ID. Mount St. Helens - PP 1250 6 Mount St. Helens. Aerial view looking east, showing bulge on north flank having two high points in its upper portion. Mount Adams on the horizon. Photo by R.L. Christiansen. Skamania and Yakima Counties, Washington. May 16, 1980. Portion of Figure 10, U.S. Geological Survey Professional Paper 1250. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198005/mpp00007 ID. Mount St. Helens - PP 1250 7 Plinian eruption column rising from the central crater of Mount St. Helens. Aerial view looking northeast showing cauliflower-like structure of eruptive column and a pall of dust rising from area north of amphitheater-shaped crater. Photo by J.G. Rosenbaum. Skamania County, Washington. May 18, 1980, 1330 PDT. Portion of Figure 12, U.S. Geological Survey Professional Paper 1250. #1:/Vallance J.W. Collection-Mount St. Helens*msh198007/mpp00008 ID. Mount St. Helens - PP 1250 8 Third pulse of Mount St. Helens eruption of July 22. Aerial view taken at 1907 PDT looking south, showing spreading mushroom top on convectively rising column and cloud of ash rising from an ash flow that has swept northward out of volcano's crater amphitheater. North west slope of volcano no visible at lower right. Column height about 15 km. Photo by Jim Vallance. Skamania County, Washington. July 22, 1980. Figure 14, U.S. Geological Survey Professional Paper 1250. #1:/Frank D. Collection-Mount St. Helens*msh198003e/mpp00009 ID. Mount St. Helens - PP 1250 9 Aerial view of upper cone, looking west-southwest. Although seismic activity began under Mount St. Helens on March 20, this overflight showed no unusual features except numerous tracks of earthquake-triggered snow avalanches. No evidence of fracturing of summit area was detected during careful visual observations on the afternoon of March 24, 1980. On March 25, the first cracks were noted by Bud Kimball, Tacoma, Washington. Photo by David Frank. Skamania County, Washington. March 24, 1980. Figure 17, U.S. Geological Survey Professional Paper 1250. #1:/Krimmel R.M. Collection-Mount St. Helens*msh198003e/mpp00010 ID. Mount St. Helens - PP 1250 10 Aerial view of upper cone of Mount St. Helens, looking southwest, three days after the first eruption. Fractured right side of cone came to be known as the bulge. Two craters are visible near summit. Snow is overlain by a layer of dark ash. Photo by R.M. Krimmel. Skamania County, Washington. March 30, 1980. Portion of Figure 18, U.S. Geological Survey Professional Paper 1250. #1:/Krimmel R.M. Collection-Mount St. Helens*msh198003e/mpp00011 ID. Mount St. Helens - PP 1250 11 Aerial view of Mount St. Helens looking north-northeast, Mount Rainier in distance. Distribution of dark ash resulted from wind control of plume drift. Left portion of cone is free of ash, right portion largely covered. Snowstorms later covered these ash layers, which in turn were covered by new ash. The result was many alternating layers of snow and ash. Photo by R.M. Krimmel. Skamania and Pierce Counties, Washington. March 30, 1980. Figure 19, U.S. Geological Survey Professional Paper 1250. #1:/Post A.S. Collection-Mount St. Helens*msh198004/mpp00012 ID. Mount St. Helens - PP 1250 12 Aerial view of Mount St. Helens looking west-southwest. The bulge is a prominent and rapidly changing feature. Fresh snow covered higher portions of Mount St. Helens; lower slopes are ash covered. Photo A. Post. Skamania County, Washington. April 25, 1980. Figure 20, U.S. Geological Survey Professional Paper 1250. #1:/Post A.S. Collection-Mount St. Helens*msh198003e/mpp00013 ID. Mount St. Helens - PP 1250 13 Aerial view looking west of the summit of Mount St. Helens after several small explosive eruptions. The smaller of the two pit craters was formed first on March 27. Subsequent eruptions opened the farther crater; the two craters later merged. Photo by A. Post. Skamania County, Washington. March 30, 1980. Figure 21, U.S. Geological Survey Professional Paper 1250. #1:/Post A.S. Collection-Mount St. Helens*msh198003e/mpp00014 ID. Mount St. Helens - PP 1250 14 Oblique aerial photograph of Mount St. Helens summit area, showing location of infrared anomalies seen that evening on east extension of southern graben-fault. The two pairs of arrows and dashed line indicate warm fractures. Photo by A. Post. Skamania County, Washington. March 30, 1980. Portion of Figure 153, U.S. Geological Survey Professional Paper 1250. #1:/Krimmel R.M. Collection-Mount St. Helens*msh198005/mpp00015 ID. Mount St. Helens - PP 1250 15 Aerial view of Mount St. Helens looking west. The crater has been much enlarged. As the bulge (at extreme right) has expanded, fracturing has become more extreme. Crater area has dropped relative to summit. Photo by R.M. Krimmel. Skamania County, Washington. May 17, 1980. Figure 22, U.S. Geological Survey Professional Paper 1250, 1981. #1:/Krimmel R.M. Collection-Mount St. Helens*msh198005/mpp00016 ID. Mount St. Helens - PP 1250 16 Aerial view of Mount St. Helens looking northeast. Catastrophic eruption began at 0832 PDT. Photo taken at approximately noon. The day had dawned clear, and clouds in this scene may be eruption related. Vapor rises from vent and from lakes, rivers, melted snow and ice, and from hot deposits of debris avalanche and pyroclastic flows. Ash billows from vent and from pulverized material collapsing into crater. Smoke originates from forest fires ignited by initial eruptive blasts and from later pyroclastic flows. Lightning was occurring every few seconds. No air turbulence was felt on windward side of mountain. Photo by R.M. Krimmel. Skamania County, Washington. May 18, 1980. Portion of Figure 23, U.S. Geological Survey Professional Paper 1250. #1:/Krimmel R.M. Collection-Mount St. Helens*msh198005/mpp00017 ID. Mount St. Helens - PP 1250 17 Mount St. Helens Looking southeast, showing detail of sharply defined windward edge of plume. Photo by R.M. Krimmel. Skamania County, Washington. May 18, 1980. Figure 24, U.S. Geological Survey Professional Paper 1250. #1:/Krimmel R.M. Collection-Mount St. Helens*msh198005/mpp00018 ID. Mount St. Helens - PP 1250 18 Aerial view of Mount St. Helens looking east, about 1900 PDT, when eruption plume had diminished considerably. Debris avalanche from north side of Mount St. Helens floods valley of North Fork Toutle River. Below the debris avalanche Toutle River is flooding. Much of the scene is obscured by dust and moisture clouds rising from immediately north of volcano. Countryside visible in foreground. Photo by R.M. Krimmel. Skamania County, Washington. May 18, 1980. Portion of Figure 25, U.S. Geological Survey Professional Paper 1250. #1:/Lowther S. Collection-Mount St. Helens*msh198006/mpp00019 ID. Mount St. Helens - PP 1250 19 Aerial view looking south-southeast. A portion of the devastated area in the vicinity of Mount St. Helens characterized by very little surviving vegetation, with most trees uprooted or broken off; a blanket of ash in many places; valleys partly filled by debris-avalanche material; lakes formed where debris avalanche has dammed tributary valleys. Crater of volcano visible in background. Photo by S. Lowther and A. Post. Skamania County, Washington. June 30, 1980. Figure 26, U.S. Geological Survey Professional Paper 1250. #1:/Lowther S. Collection-Mount St. Helens*msh198007/mpp00020 ID. Mount St. Helens - PP 1250 20 Aerial view of lava dome within the Mount St. Helens crater. Photo by S. Lowther and A. Post. Skamania County, Washington. July 13, 1980. Figure 27, U.S. Geological Survey Professional Paper 1250. #1:/Lowther S. Collection-Mount St. Helens*msh198007/mpp00021 ID. Mount St. Helens - PP 1250 21 Aerial view of pit left after explosive eruption of July 22. Pyroclastic flows overrode low crater rim in foreground and moved downslope toward Spirit Lake, north of Mount St. Helens. Photo by S. Lowther and A. Post. Skamania County, Washington. July 24, 1980. Figure 28, U.S. Geological Survey Professional Paper 1250. #1:/Krimmel R.M. Collection-Mount St. Helens*msh198005/mpp00022 ID. Mount St. Helens - PP 1250 22 Aerial view of Mount St. Helens the day before the catastrophic eruption, looking southwest. Features visible include road to Timberline viewpoint and parking area (A), Dogs Head (B), and the severely fractured, bulging, ash-covered Forsyth Glacier (C). An ice avalanche, darkened with volcanic debris, which originated from the bulging, oversteepened part of Forsyth Glacier, forms dark tracks below the bulge. Photo by R.M. Krimmel. Skamania County, Washington. May 17, 1980. Portion of Figure 29, U.S. Geological Survey Professional Paper 1250. #1:/Krimmel R.M. Collection-Mount St. Helens*msh198009/mpp00023 ID. Mount St. Helens - PP 1250 23 Aerial view of Mount St. Helens looking southwest after the May 18 eruption. Dogs Head (B) and part of the Forsyth Glacier remain. The road and Timberline viewing and parking area (A) were buried by air-fall ash and blast deposits and can only be discerned by careful scrutiny. Photo by R.M. Krimmel. Skamania County, Washington. September 9, 1980. Figure 30, U.S. Geological Survey Professional Paper 1250. #1:/Krimmel R.M. Collection-Mount St. Helens*msh198005/mpp00024 ID. Mount St. Helens - PP 1250 24 Aerial view of Mount St. Helens looking south directly toward the bulge. Loowit Glacier (A) and Goat Rocks (B). Numerous rock avalanches from Goat Rocks were triggered by earthquakes. Photo by R.M. Krimmel. Skamania County, Washington. May 17, 1980. Figure 31, U.S. Geological Survey Professional Paper 1250. #1:/Krimmel R.M. Collection-Mount St. Helens*msh198009/mpp00025 ID. Mount St. Helens - PP 1250 25 Aerial view of Mount St. Helens looking south, after the May 18 eruption. Remaining lower part of Forsyth Glacier in left center. Loowit Glacier is completely gone. Many pyroclastic-flow deposit lobes can be seen in foreground. Windblown dust obscured some surface details. Photo by R.M. Krimmel. Skamania County, Washington. September 9, 1980. Figure 32, U.S. Geological Survey Professional Paper 1250. #1:/Krimmel R.M. Collection-Mount St. Helens*msh198005/mpp00026 ID. Mount St. Helens - PP 1250 26 Aerial view of Mount St. Helens looking southeast with Goat Rocks in left center and Dogs Head on left ridgeline. Mount Hood just visible on far horizon. Photo by R.M. Krimmel. Skamania County, Washington. May 4, 1980. Portion of Figure 33, U.S. Geological Survey Professional Paper 1250. #1:/Krimmel R.M. Collection-Mount St. Helens*msh198008/mpp00027 ID. Mount St. Helens - PP 1250 27 Aerial view of Mount St. Helens looking southeast. Note total devastation of vegetation on near side of cone. Photo by R.M. Krimmel Skamania County, Washington. August 19, 1980. Figure 34, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh198008/mpp00028 ID. Mount St. Helens - PP 1250 28 Computer-generated shaded-relief images of filtered digital terrain models of Mount St. Helens. Data were filtered by averaging pixel values over areas. Increased uncertainty of contour location within snowfields appears as terraces (in southeast) and crevasses (in northwest). Model from photographs of August 5, 1972. Skamania County, Washington. August 5, 1972. Portion of Figure 79-A, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh198005/mpp00029 ID. Mount St. Helens - PP 1250 29 Computer-generated shaded-relief images of filtered digital terrain models of Mount St. Helens. Data were filtered by averaging pixel values over areas. Increased uncertainty of contour location within snowfields appears as terraces (in southeast) and crevasses (in northwest). Model from photographs of May 12 and 16, 1980. Small discontinuity just south of Dogs Head is an artifact of the join between May 12 and day 16 digital terrain models. Skamania County, Washington. May 16, 1980. Figure 79-B, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh/mpp00030 ID. Mount St. Helens - PP 1250 30 Computer-generated elevation-difference images of Mount St. Helens produced by subtraction of digital terrain models. April 11, 1980 minus August 5, 1972. Shows development of north peak 1. Skamania County, Washington.n.d. Figure 81-A, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh/mpp00031 ID. Mount St. Helens - PP 1250 31 Computer-generated elevation-difference images of Mount St. Helens produced by subtraction of digital terrain models. May 12/16 minus April 11, 1980. Development of north peak 2 during this period is shown as a second area of elevation increase north of the graben. Skamania County, Washington.n.d. Figure 81-B, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh1980/mpp00032 ID. Mount St. Helens - PP 1250 32 Steel towers used in geodetic monitoring of Mount St. Helens. Geologist Don Swanson at work on instrument tower at Harrys Ridge. Skamania County, Washington. 1980. Figure 94-A, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh1980/mpp00033 ID. Mount St. Helens - PP 1250 33 Steel towers used in geodetic monitoring of Mount St. Helens. Geologist at work on reflector tower "Delta" on rampart. Skamania County, Washington. Figure 94-B, U.S. Geological Survey Professional Paper 1250. #1:/Keith T. Collection-Mount St. Helens*msh198009/mpp00034 ID. Mount St. Helens - PP 1250 34 Scanning electron microscope (SEM) photograph of yellow non-crystalline encrustation material from the radial crack of the tephra blanket in the Mount St. Helens crater (sample MSH 9-16-80-1). The material consists of Al, Cl, Ca, Fe, S, and water. Dehydration cracks and incipient crystallization develop as cooling begins. Photo by T. Keith. Skamania County, Washington. September 16, 1980. Figure 134, U.S. Geological Survey Professional Paper 1250. #1:/Keith T. Collection-Mount St. Helens*msh198009/mpp00035 ID. Mount St. Helens - PP 1250 35 Scanning electron microscope (SEM) photograph of hemispheres of bladed crystals (S, Ca, Al, Fe hydrate) on poorly crystalline, partly dehydrated crust from encrustations along a radial crack in the tephra blanket in the Mount St. Helens crater (sample MSH 9-16-80-1). Photo by T. Keith. Skamania County, Washington. September 16, 1980. Figure 135, U.S. Geological Survey Professional Paper 1250. #1:/Keith T. Collection-Mount St. Helens*msh198009/mpp00036 ID. Mount St. Helens - PP 1250 36 Scanning electron microscope (SEM) photographs of dark-yellow bladed crystals that make up the "fuzzy" botryoidal crust (Cl, Al, hydrate) along radial fractures in the Mount St. Helens crater. These crystals developed from noncrystalline and poorly crystalline materials. Overall view showing botryoidal nature of blade groups. Photo by T. Keith. Skamania County, Washington. September 16, 1980. Figure 136-A, U.S. Geological Survey Professional Paper 1250. #1:/Keith T. Collection-Mount St. Helens*msh198009/mpp00037 ID. Mount St. Helens - PP 1250 37 Scanning electron microscope (SEM) photographs of dark 7 yellow bladed crystals that make up the "fuzzy" botryoidal crust (Cl, Al, hydrate) along radial fractures in the Mount St. Helens crater. These crystals developed from the noncrystalline and poorly crystalline materials. Detail of one group showing well- developed blade texture. Photo by T. Keith. Skamania County, Washington. September 16, 1980. Figure 136-B, U.S. Geological Survey Professional Paper 1250. #1:/Keith T. Collection-Mount St. Helens*msh198006/mpp00038 ID. Mount St. Helens - PP 1250 38 Scanning electron microscope (SEM) photographs of botryoidal iron hydroxide coating on ash particles (in this photograph a pyroxene grain). The thin, brick- red deposits on the dacitic pumice fragments of the pyroclastic flows from Mount St. Helens consist largely of this material. Sample MSH 6-15-80-15C. Iron hydroxide partly broken away from a pyroxene crystal. Photo by T. Keith. Skamania County, Washington. June 15, 1980. Figure 139-A, U.S. Geological Survey Professional Paper 1250. #1:/Keith T. Collection-Mount St. Helens*msh198006/mpp00039 ID. Mount St. Helens - PP 1250 39 Scanning electron microscope (SEM) photographs of botryoidal iron hydroxide coating on ash particles (in this photograph a pyroxene grain). The thin, brick- red deposits on the dacitic pumice fragments of the pyroclastic flows from Mount St. Helens consist largely of this material. Sample MSH 6-15-80-15C. High magnification to show texture. Photo by T. Keith. Skamania County, Washington. June 15, 1980. Figure 139-B, U.S. Geological Survey Professional Paper 1250. #1:/Keith T. Collection-Mount St. Helens*msh198007/mpp00040 ID. Mount St. Helens - PP 1250 40 Scanning electron microscope (SEM) photographs of anhydrite needles with later deposits of alunite (identified by XRD). This material crystallized as wispy, white crystals on a thin, red hematite-iron hydroxide deposit around fumarole 12 in the pyroclastic flow from Mount St. Helens (sample MSH 7-1-80-12D). Photo by T. Keith. Skamania County, Washington. July 1, 1980. Figure 140-A, U.S. Geological Survey Professional Paper 1250. #1:/Keith T. Collection-Mount St. Helens*msh198007/mpp00041 ID. Mount St. Helens - PP 1250 41 Scanning electron microscope (SEM) photographs of anhydrite needles with later deposits of alunite (identified by XRD). This material crystallized as wispy, white crystals on a thin, red hematite-iron hydroxide deposit around fumarole 12 in the pyroclastic flow from Mount St. Helens (sample MSH 7-1-80-12D). Photo by T. Keith. Skamania County, Washington. July 1, 1980. Figure 140-B, U.S. Geological Survey Professional Paper 1250. #1:/Keith T. Collection-Mount St. Helens*msh198007/mpp00042 ID. Mount St. Helens - PP 1250 42 Scanning electron microscope (SEM) photograph of botryoidal, non-crystalline hydrate of S, Al, Cl and Fe showing concentric dehydration cracks (sample MSH 7-1-80-8B). This material forms abundant yellow encrustations around fumaroles in the Mount St. Helens debris avalanche. Photo by T. Keith. Skamania County, Washington. July 1, 1980. Figure 142, U.S. Geological Survey Professional Paper 1250. #1:/Keith T. Collection-Mount St. Helens*msh198007/mpp00043 ID. Mount St. Helens - PP 1250 43 Scanning electron microscope (SEM) photograph of a bladed crystal of hydrous calcium sulfate containing minor amounts of Fe and Al forming from botryoidal yellow noncrystalline material (sample MSH 7-1-80-6B). Mount St. Helens, Skamania County, Washington. July 1, 1980. Figure 143, U.S. Geological Survey Professional Paper 1250. #1:/Keith T. Collection-Mount St. Helens*msh198007/mpp00044 ID. Mount St. Helens - PP 1250 44 Scanning electron microscope (SEM) photograph of a group of gypsum crystals (sample MSH 7-1-80-8B). Clear to pale-yellow crystal groups of this type form on the darker yellow material. Photo by T. Keith. Mount St. Helens, Skamania County, Washington. July 1, 1980. Figure 144, U.S. Geological Survey Professional Paper 1250. #1:/Keith T. Collection-Mount St. Helens*msh198007/mpp00045 ID. Mount St. Helens - PP 1250 45 Scanning electron microscope (SEM) photographs of clear, fibrous bundles of halotrichite (FeA12(So4)4 22H20) crystals, which crystallize on white colloform hydrous calcium sulfate encrustations (sample MSH 7-1-80-6A). Radiating crystal groups and some bent crystals. Photo by T. Keith. Mount St. Helens, Skamania County, Washington. July 1, 1980. Figure 145-A, U.S. Geological Survey Professional Paper 1250. #1:/Keith T. Collection-Mount St. Helens*msh198007/mpp00046 ID. Mount St. Helens - PP 1250 46 Scanning electron microscope (SEM) photographs of clear, fibrous bundles of halotrichite (FeAl2(So4 4 22H20) crystals, which crystallize on white colloform hydrous calcium sulfate encrustations (sample MSH 7-1-80-6A). More detail of needles showing fresh, unleached appearance. Photo by T. Keith. Mount St. Helens, Skamania County, Washington. July 1, 1980. Figure 145-B, U.S. Geological Survey Professional Paper 1250. #1:/Keith T. Collection-Mount St. Helens*msh198007/mpp00047 ID. Mount St. Helens - PP 1250 47 Scanning electron microscope (SEM) photographs of clear, fibrous bundles of halotrichite (FeA12(So4)4 22H20) crystals, which crystallize on white colloform hydrous calcium sulfate encrustations (sample MSH 7-1-80-6A). Greater magnification shows that needles actually consist of fibrous bundles. Photo by T. Keith. Mount St. Helens, Skamania County, Washington. July 1, 1980. Figure 145-C, U.S. Geological Survey Professional Paper 1250. #1:/U.S. Forest Service Collection-Mount St. Helens*msh198007/mpp00048 ID. Mount St. Helens - PP 1250 48 Thermal infrared images of Mount St. Helens obtained prior to 1980 eruption sequence, showing the two historic thermal areas. Image shows thermal area A, a small area of weak fumarolic activity at The Boot, on north flank at 2,740 m (9,000 ft) elevation. On this late-summer morning, instruments were set to depict two levels of background heat emission - glaciers and few remaining snow patches as cold and snow-free ground as warm. Images produced by the U.S. Forest Service for the U.S. Geological Survey. Skamania County, Washington. August 7, 1971. Figure 147-A, U.S. Geological Survey Professional Paper 1250. #1:/U.S. Forest Service Collection-Mount St. Helens*msh1973/mpp00049 ID. Mount St. Helens - PP 1250 49 Thermal infrared images of Mount St. Helens obtained prior to 1980 eruption sequence, showing the two historic thermal areas. Image shows thermal area B on southwest flank at an elevation of 2,650-2,750 m (8,700-9,000 ft). The thermal features have a distinctive downslope linear trend. More snow was present at this time than in August 1971, with the result that thermal area A was covered by snow and does not appear in this image. Images produced by the U.S. Forest Service for the U.S. Geological Survey. Skamania County, Washington. April 26, 1973. Portion of Figure 147-B, U.S. Geological Survey Professional Paper 1250. #1:/Frank D. Collection-Mount St. Helens*msh198003e/mpp00050 ID. Mount St. Helens - PP 1250 50 Oblique aerial photographs of the Mount St. Helens summit area showing historic thermal areas. Distance from False Summit to summit about 600 m. Viewed from north, thermal area A, near The Boot, is covered by snow, but its location corresponds to shallow dimple in snow surface. Photo by D. Frank. Skamania County, Washington. March 24, 1980. Portion of Figure 149-A, U.S. Geological Survey Professional Paper 1250. #1:/Frank D. Collection-Mount St. Helens*msh198003e/mpp00051 ID. Mount St. Helens - PP 1250 51 Oblique aerial photographs of the Mount St. Helens summit area showing historic thermal areas. Distance from False Summit to summit about 600 m. Viewed from southwest, thermal area B appears as a cluster of snow-free patches of ground. Photo by D. Frank. Skamania County, Washington. March 24, 1980. Portion of Figure 149-B, U.S. Geological Survey Professional Paper 1250. #1:/Frank D. Collection-Mount St. Helens*msh198003e/mpp00052 ID. Mount St. Helens - PP 1250 52 Oblique aerial photograph of summit of Mount St. Helens, looking south. Location of thermal area A indicated. Note that the new fractures cross ice and rock areas with no apparent change of style, indicating the fractures are deep seated. Photo by D. Frank. Skamania County, Washington. March 27, 1980. Portion of Figure 150, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh198003e/mpp00053 ID. Mount St. Helens - PP 1250 53 Thermal infrared images of Mount St. Helens summit area obtained by U.S. Army at approximately 2300 on March 30, 1980. Thermal feature E is a topographic prominence and may result from solar heating. There are large- scale distortions in these images. Scan obtained on a low-altitude pass directly over crater. Some apparent cooling (dark areas) north and south of crater is an artifact of scanner automatic gain control. Anomalous areas are visible 150 m north of northpeak 1 (locations A,D) and in southernmost fracture east of main crater (location C). Outline of two craters is shown by dashed line. Two pairs of unlabeled arrows indicate warm fractures. Skamania County, Washington. March 30, 1980. Portion of Figure 151-A, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh198003e/mpp00054 ID. Mount St. Helens - PP 1250 54 Thermal infrared images of Mount St. Helens summit area obtained by U.S. Army at approximately 2300 on March 30, 1980. Thermal feature E is a topographic prominence and may result from solar heating. There are large- scale distortions in these images. View of upper north flank showing heating within major fractures near The Boot (fracture D and fracture through area A). In this image, observations near The Boot were approximately perpendicular to the local surface. Skamania County, Washington. March 30, 1980. Portion of Figure 151-B, U.S. Geological Survey Professional Paper 1250. #1:/Post A.S. Collection-Mount St. Helens*msh198003e/mpp00055 ID. Mount St. Helens - PP 1250 55 Oblique aerial photograph of Mount St. Helens summit area, looking south. Crater on the left was the first to form. Features which showed enhanced thermal emission at 2300 are indicated by A, D, and E. Photo by A. Post. Skamania County, Washington. March 30, 1980. Portion of Figure 152, U.S. Geological Survey Professional Paper 1250. #1:/Hurst D.R. Collection-Mount St. Helens*msh198005/mpp00056 ID. Mount St. Helens - PP 1250 56 Oblique aerial photograph of Mount St. Helens summit area, looking southwest. Thermal features observed for the first time before dawn the next day are indicated as F, and G. Thermal feature G may be extreme south end of linear thermal feature D, which disappeared as a continuous linear thermal feature by April 11. There was strong thermal emission from the southeast part of the crater May 2. Photo by D.R. Hurst. Skamania County, Washington. May 1, 1980. Portion enlarged as Figure 155, U.S. Geological Survey Professional Paper 1250. #1:/Oregon Army National Guard Collection-Mount St. Helens*msh198006/mpp00063 ID. Mount St. Helens - PP 1250 63 Vertical thermal image of Mount St. Helens crater floor. Area where dome emerged on about June 12 appears warmer than on earlier images. AAS-24A scanner thermal image taken at 2128 PDT; 8-14,grn region. Hottest areas appear white. Photo courtesy of Oregon Army National Guard. Skamania County, Washington. June 8, 1980. Figure 167, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh198006/mpp00067 ID. Mount St. Helens - PP 1250 67 Thermal details of emergent Mount St. Helens dome (d), cool tephra rampart (r), and warm surfaces of pyroclastic deposits (p) on ramp extending northward out of amphitheater toward Spirit Lake. Within crater area, aligned fumaroles demarcate southeast-striking fractures, one of which passes beneath a small lake (1, dark=cool) on crater floor. Dark area (cool) southeast of dome, between dome and inner walls of amphitheater and about equal in area to dome, is outlined by a ring of fumarolic emission. Hottest areas appear white. AAS-24A scanner vertical thermal image taken at 1000 PDT. Skamania County, Washington. June 19, 1980. Figure 171-A, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh198007/mpp00068 ID. Mount St. Helens - PP 1250 68 Thermal emission from Mount St. Helens crater floor and amphitheater. Dome fracture pattern (1) is radial and concentric or annular, giving spider web appearance. En echelon fractures (2) east of dome appear related to location of dome and a smaller hot spot northeast of dome. Individual fractures strike northwest, but en echelon set trends north-northwest. A fracture in dome surface (3) appears aligned with the southernmost northwest-striking fracture. Another smaller hot spot or vent appears to be controlled by this alignment. Inset shows, in more detail, spider web and annular fracture patterns of dome. AAS-24A scanner vertical thermal image taken 2030 PDT. Skamania County, Washington. July 15, 1980. Figure 172, U.S. Geological Survey Professional Paper 1250. #1:/Oregon Army National Guard Collection-Mount St. Helens*msh198007/mpp00069 ID. Mount St. Helens - PP 1250 69 Detailed vertical aerial view of spider web and annular fracture patterns of Mount St. Helens dome. AAS-24A scanner vertical thermal image. Photo by Oregon Army National Guard. Skamania County, Washington. July 15, 1980. Figure 172, U.S. Geological Survey Professional Paper 1250. #1:/Winner W.E. Collection-Mount St. Helens*msh1980/mpp00071 ID. Mount St. Helens - PP 1250 71 Cross-section of stomata on leaves of Grand fir after heat treatment. Heated to 20 degrees Celsius. Photo by W.E. Winner. 1980. Figure 187-A in U.S. Geological Survey. Professional paper 1250. 1981. #1:/Winner W.E. Collection-Mount St. Helens*msh1980/mpp00072 ID. Mount St. Helens - PP 1250 72 Cross sections of stomata on leaves of Grand fir after heat treatments. Heated to 250 degrees C. Wax plug (wp) in antechamber pore (ap) rose into the substomatal cavity (sc) following the 250 degrees C heat treatment. Mount St. Helens. Photo by W.E. Winner. 1980. Figure 187-B, U.S. Geological Survey Professional Paper 1250. #1:/Winner W.E. Collection-Mount St. Helens*msh1980/mpp00073 ID. Mount St. Helens - PP 1250 73 Whole mount of lower leaf surface of Grand fir after heat treatments. Heated to 20 degrees C. Photo by W.E. Winner. 1980. Figure 188-A, U.S. Geological Survey Professional Paper 1250. #1:/Winner W.E. Collection-Mount St. Helens*msh1980/mpp00074 ID. Mount St. Helens - PP 1250 74 Whole mount of lower leaf surface of Grand fir after heat treatments. Heated to 100 degrees C. As temperature increased, the wax plug (wp) in the stomatal antechamber pore (ap) melted. Mount St. Helens. Photo by W.E. Winner. 1980. Figure 188-B, U.S. Geological Survey Professional Paper 1250. #1:/Winner W.E. Collection-Mount St. Helens*msh1980/mpp00075 ID. Mount St. Helens - PP 1250 75 Whole mount of lower leaf surface of Grand fir after heat treatments. Heated to 250 degrees C. As temperature increased, the wax plug in the stomatal antechamber pore melted. Guard cells (gc) are exposed after 250øC treatment. Mount St. Helens. Photo by W.E. Winner. 1980. Figure 188-C, U.S. Geological Survey Professional Paper 1250. #1:/Winner W.E. Collection-Mount St. Helens*msh1980/mpp00076 ID. Mount St. Helens - PP 1250 76 Lower surfaces of dead fir leaves from sites 1 and 2 in the seared zone in the vicinity of Mount St. Helens. Wax plug (wp) in stomatal antechamber pore (ap) seems intact in leaf from site 1(A), but only wax plug remnants (rm) remain on leaf from site 2 (B). Cuticle of rim (r) of antechamber pore and ribbing (rb) appears glazed in leaf from site 1 (A), and outlines of guard cells (gc) are apparent in some stomata on leaf from site 2 (B). Photo by W.E. Winner. Skamania County, Washington. 1980. Figure 189-A, U.S. Geological Survey Professional Paper 1250. #1:/Winner W.E. Collection-Mount St. Helens*msh1980/mpp00077 ID. Mount St. Helens - PP 1250 77 Lower surfaces of dead fir leaves from sites 1 and 2 in the seared zone in the vicinity of Mount St. Helens. Wax plug (wp) in stomatal antechamber pore (ap) seems intact in leaf from site 1(A), but only wax plug remnants (rm) remain on leaf from site 2 (B). Cuticle of rim (r) of antechamber pore and ribbing (rb) appears glazed in leaf from site 1 (A), and outlines of guard cells (gc) are apparent in some stomata on leaf from site 2 (B. (Skamania County, Washington. 1980. Photo by W.E. Winner. Figure 189-B, U.S. Geological Survey Professional Paper 1250. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1980/mpp00078 ID. Mount St. Helens - PP 1250 78 Video-camera installation on ridge 9 km north of Mount St. Helens. Camera is mounted on top of shelter that contains microwave telemetry equipment. View is due south toward crater. Photo by R.P. Hoblitt. Skamania County, Washington. 1980. Figure 192, U.S. Geological Survey Professional Paper 1250. #1:/Miller C.D. Collection-Mount St. Helens*msh1980/mpp00079 ID. Mount St. Helens - PP 1250 79 Video-monitor and control console in the Emergency Coordination Center in Vancouver for monitoring Mount St. Helens. Photo by C.D. Miller. Clark County, Washington. 1980. #1:/Post A.S. Collection-Mount St. Helens*msh198005/mpp00080 ID. Mount St. Helens - PP 1250 80 Mount St. Helens from the northeast showing bulge on north slope east of Dogs Head, south of Sugar Bowl, and north of main summit scarp. Goat Rocks on north slope. Timberline parking area at lower right. Photo by A. Post. Skamania County, Washington. May 1, 1980. Portion of Figure 206, U.S. Geological Survey Professional Paper 1250. #1:/Krimmel R.M. Collection-Mount St. Helens*msh198006/mpp00081 ID. Mount St. Helens - PP 1250 81 Aerial view east along North Fork Toutle River at Elk Rock bend. Hummocky avalanche deposit of May 18 filled the valley to 45 m average depth. Mount St. Helens in background. Photo by R.M. Krimmel. Skamania County, Washington. June 30, 1980. Portion of Figure 214, U.S. Geological Survey Professional Paper 1250 and cover of U.S. Geological Survey Circular 850-A. #1:/Kieffer S.W. Collection-Mount St. Helens*msh1980/mpp00082 ID. Mount St. Helens - PP 1250 82 The area devastated by Mount St. Helens and damaged tree stumps. Margin of the devastated area in the Green River drainage near the intersection with Shultz Creek. View north. Note transition from devastated area in foreground through a narrow singed zone into undamaged forest in background. Photo by S.W. Kieffer. Cowlitz County, Washington. Portion of Figure 220-A, U.S. Geological Survey Professional Paper 1250. #1:/Kieffer S.W. Collection-Mount St. Helens*msh1980/mpp00083 ID. Mount St. Helens - PP 1250 83 The area devastated by Mount St. Helens and damaged tree stumps. Vertical aerial view of Fawn Lake, a small cirque lake about 0.5 km in diameter. Trees in the northwest half of the basin, below line X-X', show reverse blowdown. This is particularly easy to see on small island in southeast part of lake. Note that, in detail, blowdown pattern is complex; some partial trees are still upright on cirque wall, as indicated by two enclosed areas with dots, and some zones intermediate between direct and reverse blowdown occur (near line X-X'). Photo by S.W. Kieffer. Cowlitz County, Washington. 1980. Figure 220-B, U.S. Geological Survey Professional Paper 1250. #1:/Kieffer S.W. Collection-Mount St. Helens*msh1980/mpp00084 ID. Mount St. Helens - PP 1250 84 The area devastated by Mount St. Helens and damaged tree stumps. Splintered stump on ridge between North Fork Toutle River and South Coldwater Creek, abraded on upstream side and deformed by blast after breakage and loss of top part of the tree. Shovel for scale. Photo by S.W. Kieffer. Skamania County, Washington. 1980. Portion of Figure 220-C, U.S. Geological Survey Professional Paper 1250. #1:/Kieffer S.W. Collection-Mount St. Helens*msh1980/mpp00085 ID. Mount St. Helens - PP 1250 85 The area devastated by Mount St. Helens and damaged tree stumps. Lithic fragments and scoriaceous gray dacite driven into upstream side of a splintered stump on ridge east of Studebaker Creek. Hammer for scale. Photo by S.W. Kieffer. Skamania County, Washington. 1980. Figure 220-D, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh1980/mpp00086 ID. Mount St. Helens - PP 1250 86 Blast-deposit section showing well-developed basal unit (bracket) at location 30 on west traverse of Mount St. Helens. Note wood-rich, nonstratified nature of deposit. Centimeter tape shown for scale. Cowlitz County, Washington. 1980. Figure 228, U.S. Geological Survey Professional Paper 1250. #1:/Miller C.D. Collection-Mount St. Helens*msh1980/mpp00087 ID. Mount St. Helens - PP 1250 87 Massive unit (delineated by bracket, on published photo only) exposed on ridgetop at location 11, 9 km north of Mount St. Helens. Massive unit is overlain by surge and accretionary-lapilli units, which form a dune. Tape segments are 10 cm. Shovel also for scale. Photo by C.D. Miller. Skamania County, Washington. 1980. Portion of Figure 235, U.S. Geological Survey Professional Paper 1250. #1:/Miller C.D. Collection-Mount St. Helens*msh1980/mpp00088 ID. Mount St. Helens - PP 1250 88 Pyroclastic-surge unit exposed at location 19 on west traverse of Mount St. Helens. Note dune crest and stratification. Pocket knife for scale. Photo by C.D. Miller. Cowlitz County, Washington. 1980. Figure 236, U.S. Geological Survey Professional Paper 1250. #1:/Miller C.D. Collection-Mount St. Helens*msh1980/mpp00089 ID. Mount St. Helens - PP 1250 89 Flat-topped blast pyroclastic-flow deposit in South Coldwater Creek canyon, north of Mount St. Helens. Photograph taken in direction of flow. Photo by C.D. Miller. Cowlitz County, Washington. 1980. Portion of Figure 237, U.S. Geological Survey Professional Paper 1250. #1:/Miller C.D. Collection-Mount St. Helens*msh1980/mpp00090 ID. Mount St. Helens - PP 1250 90 Valley-fill deposit in upper Smith Creek canyon, east of Mount St. Helens, formed by a blast pyroclastic flow. Note abundant delimbed and debarked logs and wood fragments concentrated near the surface of the deposit. Photo by C.D. Miller. Skamania County, Washington. 1980. Figure 238, U.S. Geological Survey Professional Paper 1250. #1:/Hoblitt R.P. Collection-Mount St. Helens*msh1980/mpp00091 ID. Mount St. Helens - PP 1250 91 Section through the directed-blast deposit at location 1 on the northwest traverse of Mount St. Helens. Accretionary-lapilli unit shown by bracket. Ruler for scale. Photo by R.P. Hoblitt. Cowlitz County, Washington. 1980. Portion of Figure 239, U.S. Geological Survey Professional Paper 1250. #1:/Miller C.D. Collection-Mount St. Helens*msh1980/mpp00092 ID. Mount St. Helens - PP 1250 92 Handful of accretionary-lapilli from directed blast deposit at location 32, north of Mount St. Helens. Photo by C.D. Miller. Cowlitz County, Washington. 1980. Portion of Figure 240, U.S. Geological Survey Professional Paper 1250. #1:/Waitt R.B. Collection-Mount St. Helens*msh1980/mpp00093 ID. Mount St. Helens - PP 1250 93 Dunes or antidunes at surface of layer A2. View is roughly toward Mount St. Helens from 11 km to the northwest. Shovel for scale. Photo by R.B. Waitt, Jr. Cowlitz County, Washington. 1980. Portion of Figure 260, U.S. Geological Survey Professional Paper 1250. #1:/Waitt R.B. Collection-Mount St. Helens*msh1980/mpp00094 ID. Mount St. Helens - PP 1250 94 Stump of fir tree 8 km north of Mount St. Helens showing splinters tilted away from volcano and abrasion on side toward volcano. Photo by R.B. Waitt, Jr. Skamania County, Washington. 1980. Figure 265, U.S. Geological Survey Professional Paper 1250. #1:/Waitt R.B. Collection-Mount St. Helens*msh1980/mpp00095 ID. Mount St. Helens - PP 1250 95 Proximal downed tree, at Obscurity Lake 15 km north of Mount St. Helens, projecting to left beneath coarse layer A1, in turn overlain by layers A2 and A3 at right. Tree is darkened where tree was debarked and scorched where not protected by overlying layer A1. Photo by R.B. Waitt, Jr. Skamania County, Washington. 1980. Figure 266, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh1980/mpp00096 ID. Mount St. Helens - PP 1250 96 Trench enlarged and deepened by water torrents at west fork of upper Pine Creek, east of Mount St. Helens. Trench eroded through older unconsolidated lahar deposits overlain by about 0.5 m of May 18 lahar deposits. Geologist for scale at left. Skamania County, Washington. 1980. Portion of Figure 273, U.S. Geological Survey Professional Paper 1250. #1:/Post A.S. Collection-Mount St. Helens*msh198005/mpp00097 ID. Mount St. Helens - PP 1250 97 Oblique aerial photograph of upper South Fork Toutle River, west of Mount St. Helens, looking east and upstream. Arrow indicates runup of lahar on north valley side slope. Initial May 18 lahar deposits appear as dark-gray areas; later May 18 pumiceous mudflow deposits appear as light-gray areas in valley bottom. Inundated valley in bottom center of photograph is 1.0 km wide. Photo by A. Post. Skamania County, Washington. May 19, 1980. Portion of Figure 274, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh1980/mpp00098 ID. Mount St. Helens - PP 1250 98 "Bayonet" trees on inundated area along North Fork Toutle River, north of Mount St. Helens. Note sharpening of trees to points in downstream direction. Geologists for scale. Cowlitz County, Washington. 1980. Portion of Figure 278, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh1980/mpp00099 ID. Mount St. Helens - PP 1250 99 "Nurse" log lying beneath mudline showing locally passive nature of mudflow near edge of flood plain. Note marks on standing tree caused by abrasion of the log as it floated up with rising stage and then lowered during falling stage. North Fork Toutle River, north of Mount St. Helens. Cowlitz County, Washington. 1980. Figure 279, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh1980/mpp00100 ID. Mount St. Helens - PP 1250 100 Locally passive nature of mudflow is shown by relatively intact condition of house, which apparently floated on mudflow surface to this position. North Fork Toutle River, north of Mount St. Helens. Cowlitz County, Washington. 1980. Portion of Figure 280, U.S. Geological Survey Professional Paper 1250. #1:/Cummans J. Collection-Mount St. Helens*msh198005/mpp00101 ID. Mount St. Helens - PP 1250 101 Near view of characteristic mudflow marks along the Toutle River just downstream from State Highway 504 bridge, north of Mount St. Helens. The material, when dry, has a coarse, abrasive texture. Photo by J. Cummans. Cowlitz County, Washington. May 19, 1980. Figure 284, U.S. Geological Survey Professional Paper 1250. #1:/Cummans J. Collection-Mount St. Helens*msh198005/mpp00102 ID. Mount St. Helens - PP 1250 102 Aerial view of flooded area at State Highway 504 bridge just below the confluence of the North Fork and South Fork Toutle River, northwest of Mount St. Helens. Photo by J Cummans. Cowlitz County, Washington. May 19, 1980. Figure 285, U.S. Geological Survey Professional Paper 1250. #1:/Rowley P. Collection-Mount St. Helens*msh1980/mpp00103 ID. Mount St. Helens - PP 1250 103 Aerial view of pyroclastic-flow deposits of May 18, 1980, eruption of Mount St. Helens, on the western part of the pumice plain. Several phreatic-explosion pits, 5-25 m across, are visible. Base of stairsteps is in background. Photo by P. Rowley. Skamania County, Washington. 1980. Figure 288, U.S. Geological Survey Professional Paper 1250. #1:/Post A.S. Collection-Mount St. Helens*msh198005/mpp00104 ID. Mount St. Helens - PP 1250 104 Aerial view of west side of Mount St. Helens, showing emplacement of a May 18 pyroclastic flow (on the left) in the Toutle and Talus Glacier area by collapse of a margin of the Plinian column. Photo by A. Post. Skamania County, Washington. May 18, 1980. Portion of Figure 289, U.S. Geological Survey Professional Paper 1250. #1:/Rowley P. Collection-Mount St. Helens*msh198006/mpp00105 ID. Mount St. Helens - PP 1250 105 Aerial view of pyroclastic-flow deposits of June 12, 1980, eruption of Mount St. Helens, showing a tongue, nearly 1 km long, and its lobes. The deposits overlie an older thin tongue of June 12 deposits. Pyroclastic-flow deposits (light gray) and debris-avalanche deposits (dark gray) of May 19 can be seen at upper left. View looking northwest from southeast side of pumice plain. Photo by P. Rowley. Skamania County, Washington. July 13, 1980. Portion of Figure 290, U.S. Geological Survey Professional Paper 1250. #1:/Rowley P. Collection-Mount St. Helens*msh198006/mpp00106 ID. Mount St. Helens - PP 1250 106 Aerial view of the big phreatic-explosion pit, from the east, Mount St. Helens. Pyroclastic-flow deposits of June 12, 1980, have pooled in the base of the pit. Tongues of pyroclastic flow deposits of July 22 have entered east (near) side. Hills of debris-avalanche deposits occur around pit. Part of Coldwater Ridge is in upper right corner. Photo by P. Rowley. Skamania County, Washington. October 6, 1980. Figure 291, U.S. Geological Survey Professional Paper 1250. #1:/Rowley P. Collection-Mount St. Helens*msh198010/mpp00107 ID. Mount St. Helens - PP 1250 107 Distal end of a lobe of pyroclastic-flow deposits formed during the night of October 17, 1980, just north of the base of the stairsteps, Mount St. Helens. View to the southwest. Helicopter in background for scale. Photo by P. Rowley. Skamania County, Washington. October 18, 1980. Figure 296, U.S. Geological Survey Professional Paper 1250. #1:/Rowley P. Collection-Mount St. Helens*msh1980/mpp00108 ID. Mount St. Helens - PP 1250 108 Flow units of pyroclastic-flow deposits of May 18 eruption of Mount St. Helens in northern wall of the big phreatic-explosion pit. Shovel for scale. Photo by P. Rowley. Skamania County, Washington. 1980. Portion of Figure 297, U.S. Geological Survey Professional Paper 1250. #1:/Banks N.G. Collection-Mount St. Helens*msh1980/mpp00109 ID. Mount St. Helens - PP 1250 109 Vertical aerial view of recent Mount St. Helens flows showing recent pyroclastic flows, flow lobes examined, and stations A, B, and C where measurements were made. Photo by N. Banks. Skamania County, Washington. July 31, 1980. Portion of Figure 298, U.S. Geological Survey Professional Paper 1250. #1:/Head J.W. Collection-Mount St. Helens*msh1980/mpp00110 ID. Mount St. Helens - PP 1250 110 Oblique aerial view of lobes of pyroclastic-flow deposits of July 22 and August 7 eruptions of Mount St. Helens, showing generally constant width and thickness of deposits. Photo by J.W. Head. Skamania County, Washington. 1980. Figure 299, U.S. Geological Survey Professional Paper 1250. #1:/Wilson L. Collection-Mount St. Helens*msh1980/mpp00111 ID. Mount St. Helens - PP 1250 111 Perspective view of a single lobe of deposits from July 22 eruption of Mount St. Helens showing slightly raised levees and central channel. People are standing at edge of channel just inside levees. Dashed line marks approximate crest of levees. Lobe turns to right just behind people. Photo by Lionel Wilson. Skamania County, Washington. 1980. Figure 300, U.S. Geological Survey Professional Paper 1250. #1:/Wilson L. Collection-Mount St. Helens*msh1980/mpp00112 ID. Mount St. Helens - PP 1250 112 Concentration of large pumice clasts in the uppermost part of a levee, Mount St. Helens. Hammer head is 160 mm long. Photo by Lionel Wilson. Skamania County, Washington. 1980. Portion of Figure 301, U.S. Geological Survey Professional Paper 1250. #1:/Head J.W. Collection-Mount St. Helens*msh1980/mpp00113 ID. Mount St. Helens - PP 1250 113 Pumice clast showing bread crust texture of surface layer, Mount St. Helens. Pen lies within a large vesicle like structure, and additional similar features are just above the hammer head. Hammer head is 160 mm long. Photo by J.W. Head. Skamania County, Washington. 1980. Portion of Figure 302, U.S. Geological Survey Professional Paper 1250. #1:/Leighley T. Collection-Mount St. Helens*msh1981/mpp00114 ID. Mount St. Helens - PP 1250 114 The December composite dome of Mount St. Helens from the south. On the right is the scoriaceous southeast lobe, erupted starting about December 28; it is about 200 m across and 90 m high. The smoother surfaced October dome, on left, has a pit at its crest that formed by subsidence during the December activity. Photo by Terry Leighley. Skamania County, Washington. January 7, 1981. Figure 308, U.S. Geological Survey Professional Paper 1250. #1:/Friedman J.D. Collection-Mount St. Helens*msh198006/mpp00115 ID. Mount St. Helens - PP 1250 115 Photomicrographs of dacite vitrophyre. Plane polarized light; top edge of each published photomicrograph is 1.0 mm.A. Sample JDF-6-29-80-1. Typical flow- banding expressed by pyroxene and plagioclase microlites in glass matrix between plagioclase (P) and hornblende (H) phenocrysts and between vesicles (V). Opaque oxides (black), chiefly titanomagnetite, occur within a hornblende phenocryst and in the adjacent reaction rim. Photo by J.D. Friedman. Mount St. Helens, Skamania County, Washington. June 29, 1980. Portion of Figure 311-A, U.S. Geological Survey Professional Paper 1250. #1:/Friedman J.D. Collection-Mount St. Helens*msh198006/mpp00116 ID. Mount St. Helens - PP 1250 116 Photomicrographs of dacite vitrophyre. Plane polarized light; top edge of each published photomicrograph is 1.0 mm.B. Sample JDF-6-29-80-2. Pyroxene and plagioclase microlites strewn through a glassy matrix. The remainder of the section consists of vesicles (V) and orthopyroxene (0), plagioclase (P), and opaque oxide (black) phenocrysts. Photo by J.D. Friedman. Mount St. Helens, Skamania County, Washington. June 29, 1980. Portion of Figure 311-B, U.S. Geological Survey Professional Paper 1250. #1:/Waitt R.B. Collection-Mount St. Helens*msh198004/mpp00117 ID. Mount St. Helens - PP 1250 117 Near view of stratigraphy of ash and snow at Timberline parking lot, north flank of Mount St. Helens. Rule for scale is 15 cm long. Photo by R.B. Waitt, Jr. Skamania County, Washington. April 11, 1980. Figure 323, U.S. Geological Survey Professional Paper 1250. #1:/Wojcicki A.M.S. Collection-Mount St. Helens*msh198003e/mpp00118 ID. Mount St. Helens - PP 1250 118 Snow having surface layer of ash with curd texture. Sample collected east of Mount St. Helens in Smith Creek. Coin for scale. Photo by A.M. Sarna Wojcicki. Skamania County, Washington. March 29, 1980. Figure 324, U.S. Geological Survey Professional Paper 1250. #1:/Waitt R.B. Collection-Mount St. Helens*msh198004/mpp00119 ID. Mount St. Helens - PP 1250 119 Aerial view of sharp lobate margin of flow-emplaced ash on north flank of Mount St. Helens (right). At extreme right just below the lobe margin is Goat Rocks. View is to west-southwest. Photo by R.B. Waitt, Jr. Skamania County, Washington. April 2, 1980 Figure 325, U.S. Geological Survey Professional Paper 1250. #1:/Oscarson R. Collection-Mount St. Helens*msh1980/mpp00120 ID. Mount St. Helens - PP 1250 120 Scanning electron microscope (SEM) photograph of hypersthene crystal showing effects of abrasion in the vent of Mount St. Helens. Photo by Robert Oscarson. Washington. 1980. Portion of Figure 327, U.S. Geological Survey Professional Paper 1250. #1:/Oscarson R. Collection-Mount St. Helens*msh1980/mpp00121 ID. Mount St. Helens - PP 1250 121 Scanning electron microscope (SEM) photograph of plagioclase feldspar crystal showing effects of abrasion in the vent of Mount St. Helens and chipping along cleavages. Photo by Robert Oscarson. Washington. 1980. Figure 328, U.S. Geological Survey Professional Paper 1250. #1:/Oscarson R. Collection-Mount St. Helens*msh1980/mpp00122 ID. Mount St. Helens - PP 1250 122 Scanning electron microscope (SEM) photograph of coating of a pure silica phase (crystobalite or amorphous silica) on a plagioclase feldspar grain formed by hydrothermal activity in the vent of Mount St. Helens. Photographed using energy-dispersive X-ray fluorescence spectrometer. Photo by Robert Oscarson. Washington. 1980. Figure 329, U.S. Geological Survey Professional Paper 1250. #1:/Waitt R.B. Collection-Mount St. Helens*msh1980/mpp00123 ID. Mount St. Helens - PP 1250 123 Section view of units A, B, C, and D, showing divisions of unit B (layers B1, B2, B3, and B4). Right side of scale is graduated in centimeters; left side is in inches. Photo by R.B. Waitt, Jr. Mount St. Helens, Washington. 1980. Figure 357, U.S. Geological Survey Professional Paper 1250. #1:/Waitt R.B. Collection-Mount St. Helens*msh1980/mpp00124 ID. Mount St. Helens - PP 1250 124 Scattered pumice of unit E, found only in coniferous forest, overlying unit D. Rule for scale is 15 cm long. Photo by R.B. Waitt, Jr. Mount St. Helens, Washington. Portion of Figure 363, U.S. Geological Survey Professional Paper 1250. #1:/Waitt R.B. Collection-Mount St. Helens*msh1980/mpp00125 ID. Mount St. Helens - PP 1250 125 Coarse pumice from June 12 eruption that formed impact pits in the finer but much thicker May 25 air fall at Butte Camp, on southwest flank of Mount St. Helens. Scale is 15 cm long. Photo by R.B. Waitt, Jr. Skamania County, Washington. 1980. Portion of Figure 370, U.S. Geological Survey Professional Paper 1250. #1:/Waitt R.B. Collection-Mount St. Helens*msh1980/mpp00126 ID. Mount St. Helens - PP 1250 126 Coarse pumice of July 22 eruption of Mount St. Helens overlying coherent surface of silt at top of May 18 air-fall deposit. Shovel handle is about 30 cm long. Photo by R.B. Waitt, Jr. Skamania County, Washington. 1980. Portion of Figure 372, U.S. Geological Survey Professional Paper 1250. #1:/Pevear D.R. Collection-Mount St. Helens*msh1980/mpp00127 ID. Mount St. Helens - PP 1250 127 Scanning electron microscope (SEM) image of abraded pumiceous shards and feldspar in tephra from the May 18 eruption of Mount St. Helens. Sample collected in Yakima. Photo by D.R. Pevear. Yakima County, Washington. 1980. Figure 382, U.S. Geological Survey Professional Paper 1250. #1:/Pevear D.R. Collection-Mount St. Helens*msh1980/mpp00128 ID. Mount St. Helens - PP 1250 128 Scanning electron microscope (SEM) image of chabezite and smectite (magnesium-iron saponite) in an altered clast collected from the Mount St. Helens debris-avalanche deposit. Photo by D.R. Pevear. Washington. 1980. Figure 383, U.S. Geological Survey Professional Paper 1250. #1:/Pevear D.R. Collection-Mount St. Helens*msh198010/mpp00129 ID. Mount St. Helens - PP 1250 129 Scanning electron microscope (SEM) image of the interior of a pumice clast collected at a depth of 60 cm in a May pyroclastic flow from Mount St. Helens. Temperature of sample when collected was 260 degrees C. Image shows a deeply etched plagioclase grain with rounded, silica-coated crystals of analcime (?) and smaller, euhedral crystals of an unidentified aluminosilicate. Photo by D.R. Pevear. Skamania County, Washington. October 15, 1980. Figure 384, U.S. Geological Survey. Professional Paper 1250. #1:/Pevear D.R. Collection-Mount St. Helens*msh198005/mpp00130 ID. Mount St. Helens - PP 1250 130 Scanning electron microscope (SEM) images of pumiceous material from the May 18, 1980 eruption of Mount St. Helens. Interior of pumice clast collected in Yakima on May 18. Photo by D.R. Pevear. Yakima County, Washington. May 18, 1980. Figure 385-A, U.S. Geological Survey. Professional Paper 1250. #1:/Pevear D.R. Collection-Mount St. Helens*msh198010/mpp00131 ID. Mount St. Helens - PP 1250 131 Scanning electron microscope images of pumiceous material from the May 18, 1980 eruption of Mount St. Helens. Interior of pumice clast collected at a depth of 60 cm in a May pyroclastic flow. Temperature of sample when collected was 260 degrees C. Unidentified acicular mineral contains sodium and magnesium. Photo by D.R. Pevear. Skamania County, Washington. October 15, 1980. Figure 385-B, U.S. Geological Survey. Professional Paper 1250. #1:/Oscarson R. Collection-Mount St. Helens*msh1980/mpp00132 ID. Mount St. Helens - PP 1250 132 Scanning electron microscope (SEM) photograph of unsized May 18 ash from Mount St. Helens collected at Moscow, Idaho. Photo by Robert Oscarson. Latah County, Idaho. 1980. Figure 389, U.S. Geological Survey Professional Paper 1250. #1:/Oscarson R. Collection-Mount St. Helens*msh1980/mpp00133 ID. Mount St. Helens - PP 1250 133 Scanning electron microscope (SEM) photograph of unsized May 18 ash from Mount St. Helens, showing broken vesicle wall and adhering fine material. Many fragments are less than 1um across. Photo by Robert Oscarson. 1980. Figure 390, U.S. Geological Survey Professional Paper 1250. #1:/Schuster R.L. Collection-Mount St. Helens*msh1980/mpp00134 ID. Mount St. Helens - PP 1250 134 Mudflow deposit. covering State Highway 504 near the town of Toutle, northwest of Mount St. Helens, to a depth of 2 m (6 ft). Geologist for scale. Photo by R.L. Schuster. Cowlitz County, Washington. Figure 405, U.S. Geological Survey Professional Paper 1250. #1:/Crandell D.R. Collection-Mount St. Helens*msh198005/mpp00135 ID. Mount St. Helens - PP 1250 135 The 75-m (247-ft) St. Helens bridge on State Highway 504. View before May 18 eruption of Mount St. Helens. Photo by D.R. Crandell. Cowlitz County, Washington.n.d. Figure 406-A, U.S. Geological Survey Professional Paper 1250. #1:/Schuster R.L. Collection-Mount St. Helens*msh1980/mpp00136 ID. Mount St. Helens - PP 1250 136 The 75-m (247-ft) St. Helens bridge on State Highway 504 after May 18 eruption of Mount St. Helens when it was washed out by the mudflow on the North Fork Toutle River. This steel structure was carried about half km (quarter mile) downstream and was partially buried by the mudflow. Man for scale by bridge girder. Photo by R.L. Schuster. Cowlitz County, Washington. 1980. Figure 406-B, U.S. Geological Survey Professional Paper 1250. #1:/Crandell D.R. Collection-Mount St. Helens*msh1980/mpp00137 ID. Mount St. Helens - PP 1250 137 The 160-m (525-ft) steel-girder Coal Bank bridge on State Highway 504 near the town of Toutle before May 18 eruption of Mount St. Helens. Photo by D.R. Crandell. Cowlitz County, Washington.n.d. Figure 407-A, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh1980/mpp00140 ID. Mount St. Helens - PP 1250 140 Weyerhaeuser Company employee bus heavily damaged by May 18 eruption of Mount St. Helens and partially buried by mudflow on the North Fork Toutle River near Camp Baker. Bus was unoccupied when hit by the mudflow. Cowlitz County, Washington. 1980. Figure 409, U.S. Geological Survey Professional Paper 1250. #1:/Washington State Department of Transportation Collection-Mount St. Helens*msh1980/mpp00142 ID. Mount St. Helens - PP 1250 142 Removal of ash from the May 18 eruption of Mount St. Helens, Interstate 90, eastern Washington. Snowplow at work on roadway. Photo courtesy of Washington State Department of Transportation Washington. 1980. Figure 412, U.S. Geological Survey Professional Paper 1250. #1:/McLucas G.B. Collection-Mount St. Helens*msh1980/mpp00143 ID. Mount St. Helens - PP 1250 143 Spoil site, 8,000 meters square (2 acres), Ritzville (northeast of Mount St. Helens), normally reserved for surplus snow; contains 10,000 cubic meters (13,000 square yards) of ash from the May 18 eruption. Depth of spoil is 1-12 m (3-5 ft). Photo courtesy of G.B. McLucas, State of Washington, Division of Geology and Earth Resources. Adams County, Washington. 1980. Figure 413, U.S. Geological Survey Professional Paper 1250. #1:/McKnight D.M. Collection-Mount St. Helens*msh1980/mpp00144 ID. Mount St. Helens - PP 1250 144 Photomicrographs showing morphological differences between Anabaena flosaquae grown in cultures exposed to various concentrations of unfractionated Richland volcanic-ash leachate. Control culture. Mount St. Helens. Photo by D.M. McKnight. Benton County, Washington. 1980. Portion of Figure 433-A, U.S. Geological Survey Professional Paper 1250. #1:/McKnight D.M. Collection-Mount St. Helens*msh1980/mpp00145 ID. Mount St. Helens - PP 1250 145 Photomicrographs showing morphological differences between Anabaena flos- aquae grown in cultures exposed to various concentrations of unfractionated Richland volcanic ash leachate. Culture exposed to a #1: 35 dilution. Mount St. Helens. Photo by D.M. McKnight. Benton County, Washington. 1980. Portion of Figure 433-B, U.S. Geological Survey Professional Paper 1250. #1:/McKnight D.M. Collection-Mount St. Helens*msh1980/mpp00146 ID. Mount St. Helens - PP 1250 146 Photomicrographs showing morphological differences between Anabaena flos- aquae grown in cultures exposed to various concentrations of unfractionated Richland volcanic-ash leachate. Culture exposed to #1: 250 dilution. Mount St. Helens. Photo by D.M. McKnight. Benton County, Washington. 1980. Portion of Figure 433-C, U.S. Geological Survey Professional Paper 1250. #1:/Post A.S. Collection-Mount St. Helens*msh1979/mpp00147 ID. Mount St. Helens - PP 1250 147 Aerial view, eastern slope of Mount St. Helens showing Shoestring Glacier. Rock-covered surface of Shoestring Glacier is outlined by a thin dashed line. Swift Glacier can be seen just below left skyline on south slope of volcano. Conspicuous debris layers (angular, unsorted rock debris, about 1 m thick, embedded in ice) on Ape and Nelson Glaciers are shown by white arrows. Debris layer on Shoestring Glacier is concealed by surface rock debris. Survey point Marmot is shown with a white X. Approximate crater rim following May 18 eruption is shown by heavy dashed line. Photo by A. Post. Skamania County, Washington. September 29, 1979. Portion of Figure 436, U.S. Geological Survey Professional Paper 1250. #1:/Krimmel R.M. Collection-Mount St. Helens*msh198005/mpp00148 ID. Mount St. Helens - PP 1250 148 Aerial view of lower part of Shoestring Glacier, Mount St. Helens, showing narrow zones of marginal crevasses. Location of survey point Marmot indicated with black X. The approximate crater rim after May 18 is shown by dashed line. Surface of volcano was recently covered with ash. Regions where ash was dry appear light (highly reflective) compared to dark areas where ash was damp due to melting of underlying snow. Photo by R.M. Krimmel. Skamania County, Washington. May 17, 1980. Enlarged Portion of Figure 438, U.S. Geological Survey Professional Paper 1250. #1:/Driedger C.L. Collection-Mount St. Helens*msh198008/mpp00149 ID. Mount St. Helens - PP 1250 149 A 20-mm-thick ash plot 7 days after ash was spread on snow surface, South Cascade Glacier, Mount St. Helens. Distance between poles is about 5 m; each plot is about 1 m wide. Photo by C.L. Driedger. Snohomish County, Washington. August 1980. Figure 444, U.S. Geological Survey Professional Paper 1250. #1:/Gough L.P. Collection-Mount St. Helens*msh198006/mpp00150 ID. Mount St. Helens - PP 1250 150 Scanning electron photomicrograph of the bristles on part of an unwashed wheat-head rachis, location A-1, east of Mount St. Helens. Photo by L.P. Gough. Adams County, Washington. June 1980. Figure 448, U.S. Geological Survey Professional Paper 1250. #1:/Gough L.P. Collection-Mount St. Helens*msh198006/mpp00151 ID. Mount St. Helens - PP 1250 151 Scanning electron micrograph of volcanic ash on the unwashed surface of a wheat-head floret, location A-1, east of Mount St. Helens. Photo by L.P. Gough. Adams County, Washington. June 1980. Figure 449, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh198009/mpp00152 ID. Mount St. Helens - PP 1250 152 View to east of Mount St. Helens debris avalanche from distal margin, along North Fork Toutle River. Cowlitz County, Washington. September/October, 1980. Figure 461 (black and white), U.S. Geological Survey Professional Paper 1250. #1:/Wilson R.C. Collection-Mount St. Helens*msh198009/mpp00153 ID. Mount St. Helens - PP 1250 153 Photomicrograph of typical sand-sized grains from the Mount St. Helens debris avalanche, showing subangular to angular shapes. Photo by R.C. Wilson. Skamania and Cowlitz Counties, Washington. September/October, 1980. Figure 463, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh1980/mpp00164 ID. Mount St. Helens - PP 1250 164 Delta tower moved more than 300 m downslope from rampart and partly buried by pyroclastic flow from Mount St. Helens on October 16 or 17. Neck on tower was sheared off. A prism has been attached to leg of damaged tower, and slope distance from Harrys Ridge is routinely measured to this station, named Wreckage. Geologist at left. Skamania County, Washington.n.d. Figure 95, U.S. Geological Survey Professional Paper 1250. #1:/Friedman J.D. Collection-Mount St. Helens*msh198006/mpp00165 ID. Mount St. Helens - PP 1250 165 Aerial view of Mount St. Helens dacite dome from near ground level. Fracture in surface of dome is visible at upper right. Dome height is 65 m and east-west diameter is about 325 m, part of which is obscured by circumferential fumarole emanations. Photo by J.D. Friedman. Skamania County, Washington. June 29, 1980. Figure 309, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh1980/mpp00166 ID. Mount St. Helens - PP 1250 166 Typical splintered log eroded from blast deposit in South Coldwater Creek canyon, north of Mount St. Helens. Skamania County, Washington. 1980. Figure 234, U.S. Geological Survey Professional Paper 1250. #1:/Mount St. Helens*msh198005/mpp00167 ID. Mount St. Helens - PP 1250 167 Computer-generated elevation-difference image showing total elevation changes in meters, from 1972 to May 12/16, 1980. Elevation change along outer line was assumed to be negligible for purposes of computing volumes from digital terrain models. Inner line indicates approximate boundary of Mount St. Helens summit crater. Skamania County, Washington. May 1980. Figure 80, U.S. Geological Survey Professional Paper 1250. #1:/Alaska/mrd00009 ID. Miller, R.D. 9ct Alaska. Profile of ripple marks in an Alaska Railroad cut, in glacio-fluvial ice contact deposits in NW 1/4 sec. 29, T. 12 N., R. 3 W. 1949. #1:/Alaska/mrd00017 ID. Miller, R.D. 17ct Alaska. Argillite, showing slaty cleavage, on Turnagain Arm along a railroad grade between Potter and Girdwood. 1949. #1:/Miller R.D. Collection/mrd00049 ID. Miller, R.D. 49 Excavation in Peorian and Bignell loesses in bluffs near center sec. 30, T.75N., R. 43 W., Council Bluffs. Note humic layer above first terrace level from bottom. Pottawattamie County, Iowa. May 1960. #1:/Chimney Rock National Historic Site/mrd00151 ID. Miller, R.D. 151 Chimney Rock National Historic Site, Nebraska. Chimney Rock is a landmark along the old Oregon Trail that followed the Platte River. May 1951. #1:/Scotts Bluff National Monument/mrd00152 ID. Miller, R.D. 152 Scotts Bluff National Monument, Nebraska. May 1951. #1:/Scotts Bluff National Monument/mrd00153 ID. Miller, R.D. 153 Scotts Bluff National Monument, Nebraska. May 1951. #1:/Scotts Bluff National Monument/mrd00154 ID. Miller, R.D. 154 Scotts Bluff National Monument, Nebraska. Looking from the top of Scotts Bluff toward the Platte River valley. May 1951. #1:/Glacier National Park/mrg00001 ID. McGimsey, R.G. 1ct Glacier National Park, Montana. Purcell lava at Cathedral Peak. 1982. Frontispiece, U.S. Geological Survey Open-File Report 85-543. #1:/Glacier National Park/mrg00002 ID. McGimsey, R.G. 2ct Glacier National Park, Montana. Outwardly protruding pillows such as this in the Fifty Mountain area produce the hummocky outcrop shown in photo mrg00003. 1982. Figure 6-A, U.S. Geological Survey Open-File Report 85-543. #1:/Glacier National Park/mrg00003 ID. McGimsey, R.G. 3ct Glacier National Park, Montana. Mount Kipp in the Fifty Mountain area. Distinctive hummocky outcrop produced by outwardly protruding, bulbous pillows. 1982. Figure 6-B, U.S. Geological Survey Open-File Report 85-543. #1:/Glacier National Park/mrg00004 ID. McGimsey, R.G. 4ct Glacier National Park, Montana. Matrix (hyaloclastite) supported pillows at Fifty Mountain. 1982. Figure 7, U.S. Geological Survey Open-File Report 85-543. #1:/Glacier National Park/mrg00005 ID. McGimsey, R.G. 5ct Glacier National Park, Montana. Ruptured and partially drained pillow at Granite Park. Dogtoothed quartz crystals line the cavity wall. 1982. Figure 8-A, U.S. Geological Survey Open-File Report 85-543. #1:/Glacier National Park/mrg00006 ID. McGimsey, R.G. 6ct Glacier National Park, Montana. Ruptured and partially drained pillow at Fifty Mountain. The flat-bottom cavity marks the former lava level. 1982. Figure 8-B, U.S. Geological Survey Open-File Report 85-543. #1:/Glacier National Park/mrg00007 ID. McGimsey, R.G. 7ct Glacier National Park, Montana. At the base of the pillowed unit at Fifty Mountain, some pillows were forcibly emplaced into the soft Snowslip sediment. Not only was bedding deformed, but sediment was squeezed up between and around pillows. 1982. Figure 9-A, U.S. Geological Survey Open-File Report 85-543. #1:/Glacier National Park/mrg00008 ID. McGimsey, R.G. 8ct Glacier National Park, Montana. Intense soft-sediment deformation produced during pillow emplacement at Granite Park. The pillow in the lower right corner is entirely buried. The basal contact of the Purcell lava with the Snowslip Formation is, thus, locally very irregular. 1982. Figure 9-B, U.S. Geological Survey Open-File Report 85-543. #1:/Glacier National Park/mrg00011 ID. McGimsey, R.G. 11ct Glacier National Park, Montana. Hyaloclastite tuff beds, about 1 centimeter thick, interlayered with Snowslip sediment at basal contact with pillow lava on Kootenai Peak. The mass in the upper right corner is the edge of the pillow. 1982. Figure 11, U.S. Geological Survey Open-File Report 85-543. #1:/Glacier National Park/mrg00012 ID. McGimsey, R.G. 12ct Glacier National Park, Montana. Large (greater than 2 meters), massive zone in the pillowed unit on Kootenai Peak. The zone has slightly rounded borders and lies amid pillows that are, in general, less than 1 meter in diameter. Massive zones in the pillow lava unit represent either congealed feeder tubes or exceptionally large pillows. Photo mrg00013 is a close-up of the lower center part of this photograph. 1982. Figures 12-A (upper photo), U.S. Geological Survey Open-File Report 85-543. #1:/Glacier National Park/mrg00013 ID. McGimsey, R.G. 13ct Glacier National Park, Montana. Large (greater than 2 meters), massive zone in the pillowed unit on Kootenai Peak. The zone has slightly rounded borders and lies amid pillows that are, in general, less than 1 meter in diameter. Massive zones in the pillow lava unit represent either congealed feeder tubes or exceptionally large pillows. This photograph is a close-up of the lower center part of photo mrg00012. 1982. Figures 12-A (lower photo), U.S. Geological Survey Open-File Report 85-543. #1:/Glacier National Park/mrg00014 ID. McGimsey, R.G. 14ct Glacier National Park, Montana. Massive zone, 2 miles in diameter, with well rounded borders on Kootenai Peak. Note the well-developed pipe vesicles at the base. 1982. Figure 12-B, U.S. Geological Survey Open-File Report 85-543. #1:/Glacier National Park/mrg00015 ID. McGimsey, R.G. 15ct Glacier National Park, Montana. Cross section of a pillow, showing thick concentrically layered, hyaloclastite breccia that probably formed from incomplete spalling during pillow implosion. Collected from the Apgar Mountain section. 1982. Figure 13, U.S. Geological Survey Open-File Report 85-543. #1:/Glacier National Park/mrg00016 ID. McGimsey, R.G. 16ct Glacier National Park, Montana. Subspherical vesicles concentrically arranged about the perimeter of a small pillow at Granite Park. Note the radial cooling cracks. 1982. Figure 14-A, U.S. Geological Survey Open-File Report 85-543. #1:/Glacier National Park/mrg00017 ID. McGimsey, R.G. 17ct Glacier National Park, Montana. Pipe vesicles concentrically arranged about the perimeter of a pillow at Granite Park. Pillow is surrounded by hyaloclastite breccia. 1982. Figure 14-B, U.S. Geological Survey Open-File Report 85-543. #1:/Glacier National Park/mrg00018 ID. McGimsey, R.G. 18ct Glacier National Park, Montana. Cross sectional view of interconnected pillows at Hole-in-the-Wall. 1982. Figure 16, U.S. Geological Survey Open- File Report 85-543. #1:/Glacier National Park/mrg00020 ID. McGimsey, R.G. 20ct Glacier National Park, Montana. Elongate, closely-packed, tubular pillows at Granite Park. 1982. Figure 17-B, U.S. Geological Survey Open-File Report 85-543. #1:/Glacier National Park/mrg00021 ID. McGimsey, R.G. 21ct Glacier National Park, Montana. Bulbous and cylindrical pillows at Hole-in- the-Wall. 1982. Figure 18, U.S. Geological Survey Open-File Report 85-543. #1:/Glacier National Park/mrg00022 ID. McGimsey, R.G. 22ct Glacier National Park, Montana. Elongate, sinuous pillow at Fifty Mountain section. The material between the pillows is hyaloclastite breccia. 1982. Figure 19-A, U.S. Geological Survey Open-File Report 85-543. #1:/Glacier National Park/mrg00024 ID. McGimsey, R.G. 24ct Glacier National Park, Montana. Dip slope less than 1 kilometer south of the campground at Fifty Mountain. Elongate, sinuous pillows that form a tangled, entrail-like mass. Individual pillows are traceable for up to 2 meters before disappearing into the conglomeratic mass. 1982. Figure 19-C, U.S. Geological Survey Open-File Report 85-543. #1:/Glacier National Park/mrg00025 ID. McGimsey, R.G. 25ct Glacier National Park, Montana. Pinching and swelling of pillows during lateral budding produced this "neck and bulb" shape in the Fifty Mountain area. The "neck" is left of the hammer. 1982. Figure 20-A, U.S. Geological Survey Open-File Report 85-543. #1:/Glacier National Park/mrg00026 ID. McGimsey, R.G. 26ct Glacier National Park, Montana. Elongate, sinuous pillow that abruptly changed direction during budding in the Fifty Mountain area. 1982. Figure 20-B, U.S. Geological Survey Open-File Report 85-543. #1:/Glacier National Park/mrg00027 ID. McGimsey, R.G. 27ct Glacier National Park, Montana. Isolated-pillow breccia that occurs in the upper part of the pillowed unit at Granite Park. The subunit is characterized by irregularly-shaped, widely spaced pillows that are surrounded by voluminous hyaloclastite breccia. 1982. Figure 21-A, U.S. Geological Survey Open-File Report 85-543. #1:/Glacier National Park/mrg00029 ID. McGimsey, R.G. 29ct Glacier National Park, Montana. Broken-pillow breccia within the pillowed unit at Granite Park. Pillow fragments rest in a matrix of hyaloclastite breccia. 1982. Figure 22, U.S. Geological Survey Open-File Report 85-543. #1:/Glacier National Park/mrg00030 ID. McGimsey, R.G. 30ct Glacier National Park, Montana. Tongue-like pillow in the coalesced pillow zone near the top of a pillowed unit at Hole-in-the-Wall. The coalesced pillow zone marks the transition from the pillowed unit to the pahoehoe unit. 1982. Figure 23-A, U.S. Geological Survey Open-File Report 85-543. #1:/Glacier National Park/mrg00031 ID. McGimsey, R.G. 31ct Glacier National Park, Montana. Coalesced pillows at the transition from pillowed unit to pahoehoe unit. The hammer rests on a small, isolated patch of hyaloclastite breccia, the presence of which suggests that the mass was emplaced under or into water. How far underwater? Note the fluidal banding and flow structures. The lava that formed these pillow masses was not quickly chilled but instead remained hot and fluid long enough to spread laterally and coalesce with the adjacent masses. This suggests that the lava was emplaced at or near the water surface. 1982. Figure 23-B, U.S. Geological Survey Open- File Report 85-543. #1:/Glacier National Park/mrg00032 ID. McGimsey, R.G. 32ct Glacier National Park, Montana. Ropy texture of pahoehoe toes at the transition from the pillowed unit to the pahoehoe unit at Fifty Mountain. 1982. Figure 24, U.S. Geological Survey Open-File Report 85-543. #1:/Glacier National Park/mrg00033 ID. McGimsey, R.G. 33ct Glacier National Park, Montana. Cross sectional view of the transition from the upper pillow unit to the pahoehoe unit at Fifty Mountain. Zone in the center is the coalesced pillow subunit. 1982. Figure 25-A, U.S. Geological Survey Open-File Report 85-543. #1:/Glacier National Park/mrg00035 ID. McGimsey, R.G. 35ct Glacier National Park, Montana. Interpillow hyaloclastite breccia (samples). Fragments are chloritized subrounded globules and sharp-pointed shards. The sample on the left is 5 centimeters across. 1982. Figure 26, U.S. Geological Survey Open-File Report 85-543. #1:/Glacier National Park/mrg00036 ID. McGimsey, R.G. 36ct Glacier National Park, Montana. Erosionally-truncated flow units form a stair- stepped slope at Hole-in-the-Wall. The Purcell lava was referred to only as "trap" by early workers like Dawson and Bauerman, a term used to describe any dark-colored, fine-grained, nongranitic hypabyssal or extrusive rock. The term originated from the Swedish word "trappa" meaning stair-stepped. 1982. Figure 27, U.S. Geological Survey Open-File Report 85-543. #1:/Glacier National Park/mrg00037 ID. McGimsey, R.G. 37ct Glacier National Park, Montana. Tabular flow unit in the pahoehoe unit of the Purcell lava at Granite Park. 1982. Figure 28-A, U.S. Geological Survey Open-File Report 85-543. #1:/Glacier National Park/mrg00038 ID. McGimsey, R.G. 38ct Glacier National Park, Montana. Lenticular flow units at Granite Park. Regional dip of the strata is 15 to 20 degrees towards the left. 1982. Figure 28-B, U.S. Geological Survey Open-File Report 85-543. #1:/Glacier National Park/mrg00039 ID. McGimsey, R.G. 39ct Glacier National Park, Montana. Fan-shaped lava tongues of the pahoehoe flow Unit at Fifty Mountain. Note that the small fan of ropy pahoehoe in the foreground spilled from the side of the larger fan to the upper right. 1982. Figure 28-C, U.S. Geological Survey Open-File Report 85-543. #1:/Glacier National Park/mrg00040 ID. McGimsey, R.G. 40ct Glacier National Park, Montana. Three flow units at Hole-in-the-Wall. Hammer rests at the contact between the lower two flow units. Pipe vesicles are visible extending up from near the base of the middle flow unit. Note the concentration of subspherical cavities in the upper part of the lower flow unit (below hammer). The upper and lower boundaries of nearly all flow units are easily discernable on the basis of pipes near the base and concentrations of subspherical cavities near the top. 1982. Figure 29, U.S. Geological Survey Open-File Report 85-543. #1:/Glacier National Park/mrg00043 ID. McGimsey, R.G. 43ct Glacier National Park, Montana. Ropy texture of pahoehoe flow unit at Fifty Mountain. 1982. Figure 31-A, U.S. Geological Survey Open-File Report 85-543. #1:/Glacier National Park/mrg00044 ID. McGimsey, R.G. 44ct Glacier National Park, Montana. Ropy flow textures on the upper surfaces of pahoehoe flow units at Hole-in-the-Wall. 1982. Figure 31-B, U.S. Geological Survey Open-File Report 85-543. #1:/Glacier National Park/mrg00045 ID. McGimsey, R.G. 45ct Glacier National Park, Montana. Ropy pahoehoe on the southwest flank of Boulder Peak about half a kilometer south of the Boulder Pass campground. 1982. Figure 31-C, U.S. Geological Survey Open-File Report 85-543.1985. #1:/Glacier National Park/mrg00047 ID. McGimsey, R.G. 47ct Glacier National Park, Montana. Typical flow units of Purcell lava on the southwest flank of Swiftcurrent Peak about 1 kilometer south of Granite Park Chalet. Most are irregular in shape having conformed to the surface topography of underlying flow units. Figure 33, U.S. Geological Survey Open-File Report 85-543. #1:/Glacier National Park/mrg00048 ID. McGimsey, R.G. 48ct Glacier National Park, Montana. Flow units of the Purcell lava typically thin gradually and pinch out. This exposure consists of five overlapping flow units at Hole-in-the-Wall. 1982. Figure 34, U.S. Geological Survey Open-File Report 85-543. #1:/Glacier National Park/mrg00049 ID. McGimsey, R.G. 49ct Glacier National Park, Montana. Southwest flank of Boulder Peak. Thin lobe of scaly pahoehoe that has smooth, billowy surfaces and protruding toe. Pahoehoe toes can look very much like flattened pillows. However, nearly all pillows in the Purcell lava are associated with hyaloclastite breccia. The breccia is not found in conjunction with pahoehoe lobes and toes. 1982. Figure 35-A, U.S. Geological Survey Open-File Report 85-543. #1:/Glacier National Park/mrg00064 ID. McGimsey, R.G. 64ct Glacier National Park, Montana. Hole-in-the-Wall. The vent facies unit is chaotic breccia consisting of cognate blocks, bombs, and lapilli intermixed with accidental sediment blocks in a fine tuffaceous matrix. Ed Larson stands to the left of a large block of Snowslip sedimentary rock. 1982. Figure 46-A, U.S. Geological Survey Open-File Report 85-543. #1:/Glacier National Park/mrg00068 ID. McGimsey, R.G. 68ct Glacier National Park, Montana. Block of Snowslip sedimentary rock in the vent facies unit at Redhorn Peak. In this block, primary bedding is nearly undisturbed. Figure 48-A, U.S. Geological Survey Open-File Report 85-543. #1:/Glacier National Park/mrg00070 ID. McGimsey, R.G. 70ct Glacier National Park, Montana. Some blocks of Snowslip sediments were intensely deformed during the eruption that brought them to the surface. Sedimentary bedding is barely recognizable in this photograph. Figure 49-A, U.S. Geological Survey Open-File Report 85-543. #1:/Glacier National Park/mrg00075 ID. McGimsey, R.G. 75ct Glacier National Park, Montana. East flank of Boulder Peak where the Purcell lava is exposed, viewed from Hole-in-the-Wall. 1982. Figure 52, U.S. Geological Survey Open-File Report 85-543. #1:/Glacier National Park/mrg00078 ID. McGimsey, R.G. 78ct Glacier National Park, Montana. Base of the diabase sill at Hole-in-the-Wall, along the trail to Boulder Pass. The rock is very fine-grained and weathers into massive blocks. 1982. Figure 57, U.S. Geological Survey Open-File Report 85-543. #1:/Glacier National Park/mrg00079 ID. McGimsey, R.G. 79ct Glacier National Park, Montana. Diabasic texture in the center of the hypabyssal sill at Hole-in-the-Wall. The texture is most visible on slightly weathered surfaces. 1982. Photo by E. Larson. Figure 58, U.S. Geological Survey Open-File Report 85-543. #1:/Glacier National Park/mrg00101 ID. McGimsey, R.G. 101ct Glacier National Park, Montana. Fifty Mountain. Upper lava flow, overlain by fine grained Snowslip sedimentary rock with same filling a cooling crack. There is a 2 to 3-centimeter bleached, oxidized zone on the upper surface of the lava flow. August 1982. #1:/Glacier National Park/mrg00102 ID. McGimsey, R.G. 102ct Glacier National Park, Montana. Ropy pahoehoe flow tops the southwest flank of Boulder Peak. Part of upper Kintla Lake visible in the background. August 16, 1983. #1:/Glacier National Park/mrg00103 ID. McGimsey, R.G. 103ct Glacier National Park, Montana. Contact between lava flows at Hole-in-the- Wall. Note vesicles, pipe vesicles at the base of the upper flow, and zones of coalesced vesicles near the top of the lower flow. August 15, 1983. #1:/Glacier National Park/mrg00104 ID. McGimsey, R.G. 104ct Glacier National Park, Montana. Purcell lava section on the west face of Mount Cleveland just below the summit. August 21, 1983. #1:/Glacier National Park/mrg00106 ID. McGimsey, R.G. 106ct Glacier National Park, Montana. Squeeze-up or infilled cooling crack at Hole- in-the-Wall. Photo by E. Larson, 1983. #1:/Glacier National Park/mrg00109 ID. McGimsey, R.G. 109ct Glacier National Park, Montana. Felsic vein in lava flow at Hole-in-the-Wall. Photo by E. Larson, August 1982. #1:/Glacier National Park/mrg00112 ID. McGimsey, R.G. 112ct Glacier National Park, Montana. Cinder block in vent breccia at Hole-in-the- Wall. August 18, 1982. #1:/Glacier National Park/mrg00117 ID. McGimsey, R.G. 117ct Glacier National Park, Montana. Cross section through pillow lava at Fifty Mountain. July 25, 1982. #1:/Glacier National Park/mrg00118 ID. McGimsey, R.G. 118ct Glacier National Park, Montana. Pillow lava and hyaloclastite breccia near Swiftcurrent Pass in Granite Park. July 1982. #1:/Glacier National Park/mrg00119 ID. McGimsey, R.G. 119ct Glacier National Park, Montana. Pillow lava and hyaloclastite breccia at Fifty Mountain. July 24, 1982. #1:/Glacier National Park/mrg00120 ID. McGimsey, R.G. 120ct Glacier National Park, Montana. Lava flows and lobes on the southwest flank of Swiftcurrent Peak in Granite Park. July 19, 1982. #1:/Glacier National Park/mrg00121 ID. McGimsey, R.G. 121ct Glacier National Park, Montana. Bulbous pillows at Fifty Mountain. August 1982. #1:/Glacier National Park/mrg00122 ID. McGimsey, R.G. 122ct Glacier National Park, Montana. Base of Purcell lava section on Kootenai Peak. Note extremely large pillow to the right of center. August 26, 1983. #1:/Glacier National Park/mrg00123 ID. McGimsey, R.G. 123ct Glacier National Park, Montana. Snowslip strata beneath pillow lava. Pen marks a zone containing at least four thin beds of reworked hyaloclastite breccia. August 26, 1983. #1:/Glacier National Park/mrg00126 ID. McGimsey, R.G. 126ct Glacier National Park, Montana. Basal pillowed section of Purcell lava in contact with Snowslip Formation at Kootenai Peak. Note very large pillow to the lower right of pick. August 26, 1983. #1:/Glacier National Park/mrg00128 ID. McGimsey, R.G. 128ct Glacier National Park, Montana. Deb McGimsey at the south ridge of Heavens Peak. August 28, 1981. #1:/Glacier National Park/mrg00130 ID. McGimsey, R.G. 130ct Glacier National Park, Montana. U-shaped glacial valley of McDonald Creek below Heavens Peak, August 1979. #1:/Glacier National Park/mrg00131 ID. McGimsey, R.G. 131ct Glacier National Park, Montana. Jackson Glacier and Mount Jackson. August 6, 1981. #1:/Glacier National Park/mrg00133 ID. McGimsey, R.G. 133ct Glacier National Park, Montana. Bear grass along the trail at Browns Pass. August 4, 1982. #1:/Glacier National Park/mrg00134 ID. McGimsey, R.G. 134ct Glacier National Park, Montana. Friendly marmot along Highline Trail. July 4, 1979. #1:/Glacier National Park/mrg00136 ID. McGimsey, R.G. 136ct Glacier National Park, Montana. Mud chip breccia and mud balls in the Grinnell Formation at Geology Stop No. 5 along Going-to-the-Sun Highway. Photo by E. Larson, August 1982. #1:/Glacier National Park/mrg00137 ID. McGimsey, R.G. 137ct Glacier National Park, Montana. Cross sectional exposure of mud cracks in the Snowslip Formation along Going-to-the-Sun Highway. August 18, 1982. #1:/Glacier National Park/mrg00138 ID. McGimsey, R.G. 138ct Glacier National Park, Montana. Stromatolites in the Helena Formation along Highline Trail. July 4, 1979. #1:/Glacier National Park/mrg00140 ID. McGimsey, R.G. 140ct Glacier National Park, Montana. Grizzly track located on the trail to Firebrand Pass. August 1979. #1:/Glacier National Park/mrg00141 ID. McGimsey, R.G. 141ct Glacier National Park, Montana. West flank of Mount Kipp, viewed from the trail at the northern end of Flattop Mountain. Buff-colored Shepard Formation overlies the dark-colored Purcell lava. Dip slope exposure of Purcell lava in the foreground. July 22, 1982. #1:/Glacier National Park/mrg00142 ID. McGimsey, R.G. 142ct Glacier National Park, Montana. Jackson Glacier. August 1979. #1:/Glacier National Park/mrg00143 ID. McGimsey, R.G. 143ct Glacier National Park, Montana. Sperry Glacier. July 23, 1981. #1:/Glacier National Park/mrg00144 ID. McGimsey, R.G. 144ct Glacier National Park, Montana. False summit of Mount Cleveland with exposure of Purcell lava, viewed from the route along the east flank of Stoney Indian Peaks. Conophyton zone is the prominent cliff-forming bed extending across the center. September 1983. #1:/Glacier National Park/mrg00145 ID. McGimsey, R.G. 145ct Glacier National Park, Montana. Sam Dennis (left) and Game McGimsey at the Bowman Lake Ranger Station, preparing to enter the Hole-In-the-Wall area to study Purcell lava. August 4, 1982. #1:/Glacier National Park/mrg00150 ID. McGimsey, R.G. 150ct Glacier National Park, Montana. Dip slope of Purcell lava at Granite Park, viewed from the dike which cuts Purcell lava and overlying Snowslip strata. Swiftcurrent Mountain on the left. Granite Park Chalet on the left center. August 9, 1983. #1:/Glacier National Park/mrg00152 ID. McGimsey, R.G. 152ct Glacier National Park, Montana. Narrow route of the Highline Trail near Logan Pass. Photo by T. Hatcher, August 1982. #1:/Glacier National Park/mrg00153 ID. McGimsey, R.G. 153ct Glacier National Park, Montana. Southeast flank of Heavens Peak. August 29, 1983. #1:/Glacier National Park/mrg00155 ID. McGimsey, R.G. 155ct Glacier National Park, Montana. Sue Johnson walking along the top of the conophyton zone on the east flank of Stoney Indian Peaks, enroute up Mount Cleveland. August 21, 1983. #1:/Glacier National Park/mrg00156 ID. McGimsey, R.G. 156ct Glacier National Park, Montana. Flank of Mount Cleveland with Chief Mountain in the background, viewed southeast from Stoney Indian Peaks. Middle Belt carbonate sill crops out along the cliff face above the prominent red bed in the Snowslip Formation. August 21, 1983. #1:/Glacier National Park/mrg00159 ID. McGimsey, R.G. 159ct Glacier National Park, Montana. Mount Custer. September 7, 1983. #1:/Glacier National Park/mrg00160 ID. McGimsey, R.G. 160ct Glacier National Park, Montana. Interference ripples in Snowslip strata on Kootenai Peak. August 27, 1983. #1:/Glacier National Park/mrg00161 ID. McGimsey, R.G. 161ct Glacier National Park, Montana. Cross-bedding in the Snowslip Formation overlying Purcell lava at Hole-in-the-Wall. August 1982. #1:/Glacier National Park/mrg00162 ID. McGimsey, R.G. 162ct Glacier National Park, Montana. Game McGimsey on the summit of Mount Cleveland. August 21, 1983. #1:/Glacier National Park/mrg00163 ID. McGimsey, R.G. 163ct Glacier National Park, Montana. Early morning at upper Kintla Lake. July 14, 1979. #1:/Glacier National Park/mrg00168 ID. McGimsey, R.G. 168ct Glacier National Park, Montana. Ripple marks overlain by syneresis cracks in the Snowslip Formation at Hole-in-the-Wall, August 8, 1982. #1:/Glacier National Park/mrg00169 ID. McGimsey, R.G. 169ct Glacier National Park, Montana. Mud chip breccia and mud balls in the Grinnell Formation at Geology Stop No.5. #1:/Glacier National Park/mrg00171 ID. McGimsey, R.G. 171ct Glacier National Park, Montana. Kootenai Peak and Bench Lake. Purcell lava is the dark band in the center. August 27, 1983. #1:/Glacier National Park/mrg00172 ID. McGimsey, R.G. 172ct Glacier National Park, Montana. Dip slope of Purcell lava at Granite Park. Granite Park Chalet in the center. August 9, 1983. #1:/Glacier National Park/mrg00174 ID. McGimsey, R.G. 174ct Glacier National Park, Montana. Agassiz Glacier, viewed from switchback in the trail below Boulder Pass. August 19, 1981. #1:/Glacier National Park/mrg00175 ID. McGimsey, R.G. 175ct Glacier National Park, Montana. Going-to-the-Sun Mountain. August 1983. #1:/Glacier National Park/mrg00176 ID. McGimsey, R.G. 176et Glacier National Park, Montana. Lake Ellen Wilson and Lincoln Lake, viewed from Lincoln Pass. August 29, 1981. #1:/Glacier National Park/mrg00177 ID. McGimsey, R.G. 177ct Glacier National Park, Montana. Five inches of fresh snow at Granite Park. July 16, 1982. #1:/Glacier National Park/mrg00179 ID. McGimsey, R.G. 179ct Glacier National Park, Montana. Mount Cleveland and Stoney Indian Peaks, viewed from the east flank of Kootenai Peak. Purcell lava caps the summit ridge of Cleveland. August 27, 1983. #1:/Glacier National Park/mrg00180 ID. McGimsey, R.G. 180ct Glacier National Park, Montana. Stoney Indian Peaks, viewed from the summit ridge of Mount Cleveland. August 21, 1983. #1:/Glacier National Park/mrg00181 ID. McGimsey, R.G. 181ct Glacier National Park, Montana. Sue Johnson contouring around Stoney Indian Peaks enroute up Mount Cleveland. August 21, 1983. #1:/Glacier National Park/mrg00182 ID. McGimsey, R.G. 182ct Glacier National Park, Montana. Southeast along the leading edge of Lewis thrust, viewed from Mount Cleveland. Chief Mountain in the distance. August 21, 1983. #1:/Glacier National Park/mrg00186 ID. McGimsey, R.G. 186ct Glacier National Park, Montana. Thunderbird Mountain and Browns Pass, viewed from near Boulder Pass. Purcell lava in the foreground. August 16, 1981. #1:/Canada/mrg00188 ID. McGimsey, R.G. 188ct Canada. Pack ice in the Hudson Strait on Baffin Island. July 25, 1984. #1:/Canada/mrg00209 ID. McGimsey, R.G. 209ct Canada. Beached pack ice at low tide in Gold Cove on Baffin Island. August 5, 1984. #1:/Canada/mrg00226 ID. McGimsey, R.G. 226ct Canada. Crescentic gouge, an indicator of the direction of ice movement, at Midnight Harbor on Baffin Island. August 18, 1984. #1:/Canada/mrg00227 ID. McGimsey, R.G. 227ct Canada. Glacial tongue of Grinnell ice cap calving off into Watts Bay on Baffin Island. August 21, 1984. #1:/Loma Prieta, California, Earthquake October 17, 1989/mrj00001 ID. McLaughlin, R.J. 1ct Loma Prieta, California, Earthquake October 17, 1989. Summit Road area in the Santa Cruz Mountains. Northwest-trending extensional crack where dam fill settled about 0.6 meter (2 feet) and pulled away from the concrete spillway and north abutment of Austrian Dam. Slide IX-4, U.S. Geological Survey Open-File Report 90-547. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198005/mros0001 ID. Mount St. Helens Rosenbaum, J.G. 1cp Aerial view looking east across the summit and north flank of the volcano at 2:20 p.m. Skamania County, Washington. May 18, 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198005/mros0076 ID. Mount St. Helens Rosenbaum, J.G. 76ct Sand-blasted and lightly charred piece of a tree limb which fell on Mount Adams from the May 18 eruption cloud of ID. Mount St. Helens. Ruler for scale. Yakima County, Washington. May 18, 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198005/mros0077 ID. Mount St. Helens Rosenbaum, J.G. 77ct Pumice fragment and evergreen cone which fell on Mount Adams from the May 18 eruption cloud of ID. Mount St. Helens. Ruler for scale. Yakima County, Washington. May 18, 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198005/mros0078 ID. Mount St. Helens Rosenbaum, J.G. 78ct Ash-covered vehicles in Vancouver. Clark County, Washington. May 25, 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198005/mros0081 ID. Mount St. Helens Rosenbaum, J.G. 81ct Scientists inserting pipe for thermocouple into pumice flow north of Mount St. Helens. Skamania County, Washington. May/June 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198005/mros0082 ID. Mount St. Helens Rosenbaum, J.G. 82ct Rick Hoblitt and Norman Banks servicing time lapse camera. Mount St. Helens, Cowlitz County, Washington. May 31, 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198005/mros0083 ID. Mount St. Helens Rosenbaum, J.G. 83ct Norman Banks (foreground) making temperature measurement in deposit in valley of Coldwater Creek north of Mount St. Helens. Cowlitz County, Washington. May 31, 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198005/mros0087 ID. Mount St. Helens Rosenbaum, J.G. 87ct Rick Hoblitt (back to camera) and Norman Banks pounding pipe into pumice flow north of Mount St. Helens in order that a thermocouple can be inserted into flow. Skamania County, Washington. May 31, 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198005/mros0088 ID. Mount St. Helens Rosenbaum, J.G. 88ct Rick Hoblitt (left) and Norman Banks inserting pipe for the thermocouple emplacement in pumice flow north of Mount St. Helens. Skamania County, Washington. May 31, 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198006/mros0091 ID. Mount St. Helens Rosenbaum, J.G. 91ct Aerial view of timber destroyed by May 18 eruption of Mount St. Helens, on side of North Toutle River valley. Cowlitz County, Washington. June 1, 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198006/mros0093 ID. Mount St. Helens Rosenbaum, J.G. 93ct Erosion of pumice flow by a small stream, north of Mount St. Helens. Skamania County, Washington. June 1, 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198006/mros0099 ID. Mount St. Helens Rosenbaum, J.G. 99ct Norman Banks (left) and Rick Hoblitt taking a temperature measurement in deposit in valley of Coldwater Creek, north of Mount St. Helens. Cowlitz County, Washington. June 8, 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198006/mros0102 ID. Mount St. Helens Rosenbaum, J.G. 102ct Erosion of deposit from May 18 eruption of Mount St. Helens along Coldwater Creek. Cowlitz County, Washington. June 8, 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198006/mros0104 ID. Mount St. Helens Rosenbaum, J.G. 104ct Erosion of pumice flow by a small stream, north of Mount St. Helens. Skamania County, Washington. June 1, 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198006/mros0105 ID. Mount St. Helens Rosenbaum, J.G. 105ct Aerial view of timber destroyed north of Mount St. Helens by May 18 eruption. Skamania County, Washington. June 8, 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198006/mros0109 ID. Mount St. Helens Rosenbaum, J.G. 109ct Aerial view of timber blowdown - destroyed by May 18 eruption of Mount St. Helens. Skamania County, Washington. June 8, 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198006/mros0110 ID. Mount St. Helens Rosenbaum, J.G. 110ct Aerial view of timber destroyed by May 18 eruption of Mount St. Helens. Skamania County, Washington. June 8, 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198006/mros0113 ID. Mount St. Helens Rosenbaum, J.G. 113ct Norman Banks in timber destroyed by May 18 eruption of Mount St. Helens near headwaters of the Green River. Skamania County, Washington. June 8, 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198006/mros0115 ID. Mount St. Helens Rosenbaum, J.G. 115ct Section in material deposited along headwaters of the Green River during May 18 eruption of Mount St. Helens. Ruler for scale. Cowlitz County, Washington. June 8, 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198006/mros0116 ID. Mount St. Helens Rosenbaum, J.G. 116ct Material deposited near Curtis Lake during May 18 eruption of Mount St. Helens. Shovel for scale. Skamania County, Washington. June 8, 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198006/mros0118 ID. Mount St. Helens Rosenbaum, J.G. 118ct Young fir tree that had been buried by the blast deposit of May 18 eruption of Mount St. Helens. Skamania County, Washington. June 8, 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198006/mros0119 ID. Mount St. Helens Rosenbaum, J.G. 119ct View up Coldwater Creek, north of Mount St. Helens. Cowlitz County, Washington. June 9, 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198006/mros0127 ID. Mount St. Helens Rosenbaum, J.G. 127ct E. Graeber of Sandia Labs recovering time lapse camera buried by blast on May 18 at observation site 12 km northwest of Mount St. Helens. Cowlitz County, Washington. Mid-June 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198006/mros0132 ID. Mount St. Helens Rosenbaum, J.G. 132ct Vehicle heavily damaged by May 18 eruption, near Meta Lake 13 km northeast of Mount St. Helens. Skamania County, Washington. June 18, 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198006/mros0133 ID. Mount St. Helens Rosenbaum, J.G. 133ct Back seat of vehicle heavily damaged by May 18 eruption, near Meta Lake 13 km northeast of Mount St. Helens. Skamania County, Washington. June 18, 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198006/mros0134 ID. Mount St. Helens Rosenbaum, J.G. 134ct Destroyed signal light on heavily damaged vehicle by May 18 eruption, near Meta Lake 13 km northeast of Mount St. Helens. Skamania County, Washington. June 18, 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198006/mros0136 ID. Mount St. Helens-Rosenbaum, J. 136ct View of seat of Caterpillar located near Meta Lake, 13 km northeast of Mount St. Helens. Skamania County, Washington. June 18, 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198006/mros0137 ID. Mount St. Helens Rosenbaum, J.G. 137ct Damaged gauges on Caterpillar tractor located near Meta Lake, 13 km northeast of Mount St. Helens. Skamania County, Washington. June 18, 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198006/mros0139 ID. Mount St. Helens Rosenbaum, J.G. 139ct Aerial view looking south at Hanaford Lake, north of Mount St. Helens. Skamania County, Washington. June 18, 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198006/mros0140 ID. Mount St. Helens Rosenbaum, J.G. 140ct Damaged pickup truck located on ridge top about 14 km north of Mount St. Helens. View to the south. Skamania County, Washington. June 18, 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198006/mros0141 ID. Mount St. Helens Rosenbaum, J.G. 141ct Dashboard of pickup truck located on ridge top about 14 km north of Mount St. Helens. Skamania County, Washington. June 18, 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198006/mros0144 ID. Mount St. Helens Rosenbaum, J.G. 144ct Aerial view of timber blowdown - destroyed by May 18 eruption of Mount St. Helens. Skamania County, Washington. June 8, 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198006/mros0145 ID. Mount St. Helens Rosenbaum, J.G. 145ct Life returns to the vicinity of Mount St. Helens. B, Avalanche lilies (Erythronium montanum) growing through blast deposits from May 18 eruption, about 10 miles northwest of the volcano. Skamania County, Washington. June 8, 1980. Page B109, U.S. Geological Survey Professional Paper 1240-B and Figure 57, U.S. Geological Survey Professional Paper 1249. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198006/mros0170 ID. Mount St. Helens-Rosenbaum, J. 170ct Damaged bed of a pickup truck located on the north side of the South Fork Toutle River, about 6 km west of Mount St. Helens. The large rock (partially in shadow) is a piece of dacite hurled into the pickup's bed during the eruption of May 18, 1980. Cowlitz County, Washington. June 30, 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198006/mros0171 ID. Mount St. Helens-Rosenbaum, J. 171ct View of dacite block which is part of the blast deposit of May 18, 1980. The block is located on the north side of the South Fork Toutle River about 6 km west of Mount St. Helens. Cowlitz County, Washington. June 30, 1980. (Knapsack for scale) #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198006/mros0172 ID. Mount St. Helens-Rosenbaum, J. 172ct Front of pickup truck damaged in the May 18, 1980 eruption, located on the north side of South Fork Toutle River about 6 km west of Mount St. Helens. Cowlitz County, Washington. June 30, 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198006/mros0187 ID. Mount St. Helens Rosenbaum, J.G. 187ct Oblique aerial view of dome at Mount St. Helens. Skamania County, Washington. June 9(?), 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198006/mros0196 ID. Mount St. Helens Rosenbaum, J.G. 196ct Side of damaged pickup truck with camper located on ridge top about 14 km north of Mount St. Helens. Skamania County, Washington. June 28, 1980 #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198006/mros0197 ID. Mount St. Helens-Rosenbaum, J. 197ct Front of pickup truck damaged in the May 18, 1980 eruption, located on north side of South Fork Toutle River about 6 km west of Mount St. Helens. Cowlitz County, Washington. June 30, 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198006/mros0198 ID. Mount St. Helens Rosenbaum, J.G. 198ct Rear of damaged pickup truck with camper located on ridge top about 14 km north of Mount St. Helens. Skamania County, Washington. June 18 (28?), 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198006/mros0199 ID. Mount St. Helens-Rosenbaum, J. 199ct Different view of damaged bed of pickup truck located on north side of South Fork Toutle River, about 6 km west of Mount St. Helens. The large rock (partially in shadow) is a piece of dacite hurled into the pickup's bed during the eruption of May 18, 1980. Cowlitz County, Washington. June 30, 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198006/mros0200 ID. Mount St. Helens-Rosenbaum, J. 200ct Another view of truck caught in and damaged by Mount St. Helens eruption of May 18, 1980. Cowlitz County, Washington. June 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198006/mros0201 ID. Mount St. Helens Rosenbaum, J.G. 201ct Melted lightcover on truck, damaged paint and chrome as a result of May 18 eruption of Mount St. Helens. Skamania County, Washington. June 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198006/mros0202 ID. Mount St. Helens Rosenbaum, J.G. 202ct Melted lightcover on truck, damaged paint and chrome as a result of May 18 eruption of Mount St. Helens. Skamania County, Washington. June 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198006/mros0203 ID. Mount St. Helens Rosenbaum, J.G. 203ct Interior(?) of vehicle damaged by May 18 eruption of Mount St. Helens. Cowlitz or Skamania County, Washington. June 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198006/mros0204 ID. Mount St. Helens Rosenbaum, J.G. 204ct Piece of wood driven into back of seat of truck caught in May 18 eruption of Mount St. Helens. Cowlitz or Skamania County, Washington. June 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198006/mros0205 ID. Mount St. Helens Rosenbaum, J.G. 205ct Geologist Rick Hoblitt, wearing mask, by the headwaters of the Green River, northwest of Mount St. Helens. Skamania County, Washington. June 8, 1980. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198006/mros0206 ID. Mount St. Helens-Rosenbaum, J. 206ct Cross-section in material deposited along headwaters of Green River? during May 18, 1980 eruption. Ruler for scale. Cowlitz County, Washington. June 8, 1980. (See. also MSH-Rosenbaum photo nos. 115ct, 116ct) 1. Pyroclastic flows. #1:/Rosenbaum J.G. Collection-Mount St. Helens*msh198006/mros0207 ID. Mount St. Helens Rosenbaum, J.G. 207ct Material deposited near Curtis Lake during May 18 eruption of Mount St. Helens. Knife handle for scale. Skamania County, Washington. June 8, 1980. #1:/Swanson D.A. Collection-Mount St. Helens*msh198005m/msda0001 ID. Mount St. Helens Swanson, D.A. 1ct Mount St. Helens in eruption. Aerial view of lower part of eruptive column is partially obscured by clouds. 0930 hrs PDT. Skamania County, Washington. May 18, 1980. #1:/Swanson D.A. Collection-Mount St. Helens*msh198005/msda0002 ID. Mount St. Helens Swanson, D.A. 2ct Mount St. Helens in eruption. Aerial view of eruptive column which is very dark. Top of Mount St. Helens is obscured by clouds. 0935 PDT. Skamania County, Washington. May 18, 1980. #1:/Swanson D.A. Collection-Mount St. Helens*msh198005/msda0003 ID. Mount St. Helens Swanson, D.A. 3ct Mount St. Helens in eruption. Aerial view of eruptive column. Mount St. Helens and surrounding area obscured by clouds. 0940 hrs PDT. Skamania County, Washington. May 18, 1980. #1:/Swanson D.A. Collection-Mount St. Helens*msh198005/msda0004 ID. Mount St. Helens Swanson, D.A. 4ct Mount St. Helens in eruption. Aerial views of volcano with eruptive column drifting to north and east and other eruptive or smoke clouds beyond. Clouds obscure rim of crater and background. 0945 PDT. Skamania County, Washington. May 18, 1980. #1:/Swanson D.A. Collection-Mount St. Helens*msh198005/msda0005 ID. Mount St. Helens Swanson, D.A. 5ct Mount St. Helens in eruption. Aerial views of volcano with eruptive column drifting to north and east and other eruptive or smoke clouds beyond. Clouds obscure rim of crater and background. 0945 PDT. Skamania County, Washington. May 18, 1980. #1:/Swanson D.A. Collection-Mount St. Helens*msh198005/msda0006 ID. Mount St. Helens Swanson, D.A. 6ct Mount St. Helens in eruption. Aerial views of volcano with eruptive column drifting to north and east and other eruptive or smoke clouds beyond. Clouds obscure rim of crater and background. 0945 PDT. Skamania County, Washington. May 18, 1980. #1:/Mount St. Helens*msh198005/msda0007 ID. Mount St. Helens Swanson, D.A. 7ct Mount St. Helens in eruption. Aerial view of eruptive column and upper part of volcano. 0950 hrs PDT. Skamania County, Washington. May 18, 1980. #1:/Swanson D.A. Collection-Mount St. Helens*msh198005/msda0008 ID. Mount St. Helens Swanson, D.A. 8ct Mount St. Helens in eruption. Aerial view with upper part of volcano and lower part of eruptive column on right. Cloud-covered countryside on left. 0950 hrs PDT. Skamania County, Washington. May 18, 1980. #1:/Swanson D.A. Collection-Mount St. Helens*msh198005/msda0009 ID. Mount St. Helens Swanson, D.A. 9ct Mount St. Helens in eruption. Aerial view of part of crater rim and lower section of eruptive plume. 1005 hrs PDT. Skamania County, Washington. May 18, 1980. #1:/Swanson D.A. Collection-Mount St. Helens*msh198005/msda0010 ID. Mount St. Helens Swanson, D.A. 10ct Mount St. Helens in eruption. Aerial view of eruptive column showing ejected material falling back toward crater. 1005 hrs PDT. Skamania County, Washington. May 18, 1980. #1:/Swanson D.A. Collection-Mount St. Helens*msh198005/msda0011 ID. Mount St. Helens Swanson, D.A. 11ct Mount St. Helens in eruption. Aerial view of crater rim at right. Eruptive column and ash cloud spreading over pumice plain at left. 1005 hrs PDT. Skamania County, Washington. May 18, 1980. #1:/Swanson D.A. Collection-Mount St. Helens*msh198005/msda0012 ID. Mount St. Helens Swanson, D.A. 12ct Mount St. Helens in eruption. Aerial view of crater rim, eruptive column, and ash cloud. 1010 hrs PDT. Skamania County, Washington. May 18, 1980. #1:/Swanson D.A. Collection-Mount St. Helens*msh198005/msda0013 ID. Mount St. Helens Swanson, D.A. 13ct Mount St. Helens in eruption. Aerial view of crater rim, lower part of eruptive column and ash cloud. Cloud-covered countryside in background. 1010 hrs PDT. Skamania County, Washington. May 18, 1980. #1:/Swanson D.A. Collection-Mount St. Helens*msh198005/msda0014 ID. Mount St. Helens Swanson, D.A. 14ct Mount St. Helens in eruption. Aerial view of crater rim and ash cloud covering pumice plain. Edge of eruptive column at right. 1045 hrs PDT. Skamania County, Washington. May 18, 1980. #1:/Swanson D.A. Collection-Mount St. Helens*msh198005/msda0015 ID. Mount St. Helens Swanson, D.A. 15ct Mount St. Helens in eruption. Aerial view looking generally Eastward. Eruptive column, ash cloud, and upper portion of volcano. Hazy countryside in background. 1045 hrs PDT. Skamania County, Washington. May 18, 1980. #1:/Swanson D.A. Collection-Mount St. Helens*msh198005/msda0016 ID. Mount St. Helens Swanson, D.A. 16ct Mount St. Helens in eruption. Aerial view of upper half of Volcano. Eruptive column cloud-darkened in background. 1045hrs PDT. Skamania County, Washington. May 18, 1980. #1:/Swanson D.A. Collection-Mount St. Helens*msh198005/msda0017 ID. Mount St. Helens Swanson, D.A. 17ct Mount St. Helens in eruption. Aerial view looking generally eastward. Eruptive column and crater rim at right. Spreading ash cloud at left. 1045 hrs PDT. Skamania County, Washington. May 18, 1980. #1:/Swanson D.A. Collection-Mount St. Helens*msh198005/msda0018 ID. Mount St. Helens Swanson, D.A. 18ct Mount St. Helens in eruption. Aerial view looking generally northeastward. Eruptive column with ash cloud at left. 1050 hrs PDT. Skamania County, Washington. May 18, 1980. #1:/Swanson D.A. Collection-Mount St. Helens*msh198005/msda0019 ID. Mount St. Helens Swanson, D.A. 19ct Mount St. Helens in eruption. Aerial view looking generally northeastward. Eruptive column with ash cloud at left. 1100 hrs PDT. Skamania County, Washington. May 18, 1980. #1:/Swanson D.A. Collection-Mount St. Helens*msh198005/msda0020 ID. Mount St. Helens Swanson, D.A. 20ct Mount St. Helens in eruption. Aerial view of lower part of eruptive column which is very dark. Hazy countryside in background. 1150 hrs PDT. Skamania County, Washington. May 18, 1980. #1:/Swanson D.A. Collection-Mount St. Helens*msh198005/msda0021 ID. Mount St. Helens Swanson, D.A. 21ct Mount St. Helens in eruption. Aerial view of upper part of Volcano. Eruptive column, ash cloud spreading to left. 1215 hrs PDT. Skamania County, Washington. May 18, 1980. #1:/Swanson D.A. Collection-Mount St. Helens*msh198005/msda0022 ID. Mount St. Helens Swanson, D.A. 22ct Mount St. Helens in eruption. Aerial view of upper part of volcano, eruptive column. 1217 hrs PDT. Skamania County, Washington. May 18, 1980. #1:/Swanson D.A. Collection-Mount St. Helens*msh198005/msda0023 ID. Mount St. Helens Swanson, D.A. 23ct Mount St. Helens in eruption. Aerial view of upper part of volcano. Eruptive column, ash cloud, ash flows below rim of crater. 1217 hrs PDT. Skamania County, Washington. May 18, 1980. #1:/Swanson D.A. Collection-Mount St. Helens*msh198005/msda0024 ID. Mount St. Helens Swanson, D.A. 24ct Mount St. Helens in eruption. Aerial view of part of eruptive column. 1217 hrs PDT. Skamania County, Washington. May 18, 1980. #1:/Swanson D.A. Collection-Mount St. Helens*msh198005/msda0025 ID. Mount St. Helens Swanson, D.A. 25ct Mount St. Helens in eruption. Aerial view of upper part of volcano, eruptive column. 1218 hrs PDT. Skamania County, Washington. May 18, 1980. #1:/Swanson D.A. Collection-Mount St. Helens*msh198005/msda0026 ID. Mount St. Helens Swanson, D.A. 26ct Mount St. Helens in eruption. Aerial views of eruptive column. 1220 hrs PDT. Skamania County, Washington. May 18, 1980. #1:/Swanson D.A. Collection-Mount St. Helens*msh198005/msda0027 ID. Mount St. Helens Swanson, D.A. 27ct Mount St. Helens in eruption. Aerial views of eruptive column. 1220 hrs PDT. Skamania County, Washington. May 18, 1980. #1:/Swanson D.A. Collection-Mount St. Helens*msh198005/msda0028 ID. Mount St. Helens Swanson, D.A. 28ct Mount St. Helens in eruption. Aerial view of base of eruptive column, crater rim at right. Shows "cauliflower" effect in column. 1235 hrs PDT. Skamania County, Washington. May 18, 1980. #1:/Mount St. Helens*msh198005/msh00001 ID. Mount St. Helens - 1 Mount St. Helens on May 17, 1980 from the northeast. Skamania County, Washington. #1:/Mount St. Helens*msh198005/msh00002 ID. Mount St. Helens - 2 Aerial view of eruption of Mount St. Helens. Skamania County, Washington. May 18, 1980. Published opposite p. 1 in U.S. Geological Survey. Yearbook. 1980. #1:/Mount St. Helens*msh198005/msh00003 ID. Mount St. Helens - 3 Mount St. Helens in eruption on May 18, 1980; with the upper third of the mountain centered in the photo? Mount Adams in background. Skamania County, Washington. #1:/Mount St. Helens*msh198005/msh00004 ID. Mount St. Helens - 4 Closer view of crater of Mount St. Helens on May 18, 1980. Skamania County, Washington. #1:/Mount St. Helens*msh198005/msh00005 ID. Mount St. Helens - 5 Mount St. Helens in eruption on May 18, 1980 showing the violence of the eruption in contrast with the quiet countryside, Mount Adams in background. Skamania County, Washington. #1:/Mount St. Helens*msh198005/msh00006 ID. Mount St. Helens - 6 Mount St. Helens looking toward the southeast on May 18, 1980, shows a very close view of the crater and eruption, with snow-covered Mount Hood in the distant horizon. Skamania County, Washington. #1:/Mount St. Helens*msh198005/msh00007 ID. Mount St. Helens - 7 Mount St. Helens in eruption on May 18, 1980 showing portion of crater and Mount Adams in background. Skamania County Washington. #1:/Mount St. Helens*msh198008/msh00008 ID. Mount St. Helens - 8 Dikes and pyroclastic and glacial stratigraphy on crater wall. Skamania County, Washington. August 11, 1980. #1:/Mount St. Helens*msh198008/msh00009 ID. Mount St. Helens - 9 Dikes in crater wall. Skamania County, Washington. August 11, 1980. #1:/Mount St. Helens*msh198004/msh00010 ID. Mount St. Helens - 10 Geologist Dave Johnston with gas-detection instrument at Mount St. Helens. Skamania County, Washington. April 4, 1980. #1:/Glicken H.C. Collection-Mount St. Helens*msh198005/msh00011 ID. Mount St. Helens - 11 Geologist Dave Johnston at Coldwater II. Photo by H. Glicken. Skamania County, Washington. May 17, 1980. #1:/Mount St. Helens*msh198007/msh00013 ID. Mount St. Helens - 13 North Fork Toutle River along SR 504. Geologist in foreground and Coal Bank bridge in background. Cowlitz County, Washington. July 5, 1980. #1:/Mount St. Helens*msh198008/msh00014 ID. Mount St. Helens - 14 Norm Banks and another geologist, west wall of amphitheater from rampart. Skamania County, Washington. August 11, 1980. #1:/Mount St. Helens*msh198007/msh00015 ID. Mount St. Helens - 15 Mount St. Helens from Spirit Lake. Skamania County, Washington. July 1959. #1:/Post A.S. Collection-Mount St. Helens*msh198005/msh00017 ID. Mount St. Helens - 17 Mount St. Helens in eruption, showing the upper third of the mountain. Photo by Austin Post. Skamania County, Washington. May 18, 1980. #1:/Mount St. Helens*msh198005/msh00018 ID. Mount St. Helens - 18 Mount St. Helens in May 1980. Skamania County, Washington. Published on page 29 in Geological Survey. Circular 857. 1981. #1:/Mount St. Helens*msh198006/msh00019 ID. Mount St. Helens - 19 Devastation at the Spud Mountain site on June 5, 1980, following the eruption of Mount St. Helens, Skamania County, Washington. June 5, 1980. Published on page 30 U.S. Geological Survey. Circular 857. 1981. #1:/Mount St. Helens*msh198005/msh00020 ID. Mount St. Helens - 20 Aerial view of eruption of Mount St. Helens. Skamania County, Washington. May 18, 1980. Published opposite p. 1 in U.S. Geological Survey. Yearbook. 1980. #1:/Mount St. Helens*msh198005/msh00021 ID. Mount St. Helens - 21 Aerial view of devastated area in the valley of the North Toutle River showing deforestation, reordered drainage, and the surface of debris flow and blast deposits of the May 18, 1980 eruption. Cowlitz County, Washington. 1980. Published on p. 6 in U.S. Geological Survey. Yearbook. 1980. #1:/Mount St. Helens*msh198005/msh00022 ID. Mount St. Helens - 22 Mount St. Helens. Septum in summit crater, viewed from northeast. Crater floor hidden by plumes from vent. Skamania County, Washington. May 30, 1980. Published as upper photo, p. 15 in U.S. Geological Survey. Yearbook. 1980. #1:/Miller C.D. Collection-Mount St. Helens*msh1980/msh00023 ID. Mount St. Helens - 23 Devastated area in the valley of the North Toutle River showing deforestation, reordered drainage, and the surface of debris flow and blast deposits resulting from the eruption of Mount St. Helens. View looking south shows volcano no and amphitheater in background. Photo by C. Dan Miller. Skamania County, Washington. 1980. Published as lower photo, p. 15 in U.S. Geological Survey. Yearbook. 1980. #1:/Mount St. Helens*msh198008*msh1979/msh00024 ID. Mount St. Helens - 24 Mount St. Helens, before and after. Viewed from space, the snow-capped peak of Mount St. Helens was a typical small bright volcano nic feature in a September 11, 1979 Landsat image (21693-18095). An August 19, 1980 Landsat image (22036-18201) of the same area shows the extent of devastation caused by the May 18 and subsequent eruptions. Note the elongated crater, the blasted area where forested slopes had stood, and the extent of debris and mudflow along stream channels. The different tone of Swift Reservoir to the southeast, is caused by deposition of 11 million acre-feet of water, mud and debris. Skamania and Cowlitz Counties, Washington. September 11, 1979 and August 19, 1980. Portion published on p. 90 in U.S. Geological Survey. Yearbook. 1980. #1:/Mount St. Helens*msh1980/msh00025 ID. Mount St. Helens - 25 The May 18, 1980 eruption of Mount St. Helens caused flooding and sedimentation along the Cowlitz River, Cowlitz County, Washington. 1980. Published on p. 93 in U.S. Geological Survey. Yearbook. 1980. #1:/Wallace R.E. Collection-Mount St. Helens*msh1981/msh00026 ID. Mount St. Helens - 26 Aerial view from the northwest across devastated area to snow covered Mount St. Helens. Skamania County, Washington. April 17, 1981. Photo by R.E. Wallace). Published on p. 179 in U.S. Geological Survey. Earthquake information bulletin, v. 13, no.5. September-October 1981. #1:/Wallace R.E. Collection-Mount St. Helens*msh198005/msh00027 ID. Mount St. Helens - 27 Aerial view of timber blown down by the horizontal blast of Mount St. Helens on May 18, 1980. Photo by R.E. Wallace. Skamania County, Washington. April 17, 1981. Published on p. 181 in U.S. Geological Survey. Earthquake information bulletin, v. 13, no.5. September-October 1981. #1:/Mount St. Helens*msh1980/msh00028 ID. Mount St. Helens - 28 Aerial view to the south from vicinity of the north shore of Spirit Lake toward caldera like amphitheatre of Mount St. Helens. Tree blowdown and devastation in foreground. Skamania County, Washington. 1980. Published on p. 11 in U.S. Geological Survey. Yearbook. 1980. #1:/Post A.S. Collection-Mount St. Helens*msh198005/msh00029 ID. Mount St. Helens - 29 Aerial view of volcano no in eruption with its violence in contrast with the quiet countryside in the foreground. Photo 80S3 203 by Austin Post. Skamania County, Washington. May 18, 1980. #1:/Post A.S. Collection-Mount St. Helens*msh198004/msh00030 ID. Mount St. Helens - 30 Aerial view of eruption in early April. Most of surrounding country obscured by clouds. Photo 80S2 010 by Austin Post. Skamania County, Washington. April 10, 1980. #1:/Mount St. Helens*msh198005/msh00031 ID. Mount St. Helens - 31 Aerial view of flooding along the Cowlitz River at Castle Rock, following massive mudflows initiated by the eruption of Mount St. Helens volcano no From 3-to 5 feet of sediment were deposited over the Castle Rock fairground. The business section of Castle Rock (in background) was protected by a levee. Cowlitz County, Washington. May 19, 1980. Published on p. B47, lower photo, in U.S. Geological Survey. Professional paper 1240-B. 1981. #1:/Mount St. Helens*msh1980/msh00032 ID. Mount St. Helens - 32 The late Dr. David Johnston, U.S. Geological Survey, using a correlation spectrometer which measures ultra-violet radiation as an indicator of the sulfur dioxide content of gases ejected from Mount St. Helens. Skamania County, Washington. 1980. Published on p. B100 in U.S. Geological Survey. Professional paper 1240-B. 1981. #1:/Leighley T. Collection-Mount St. Helens*msh1981/msh00033 ID. Mount St. Helens - 33 Low aerial view of lava dome that developed in the crater of Mount St. Helens since the October 1980 eruption. The dome is approximately 300 feet high and 800 feet across. The helicopter in foreground shows scale. Photo by Terry Leighley. Skamania County, Washington. January 7, 1981. Published on p. 98, lower photo, in U.S. Geological Survey. Earthquake information bulletin, v. 13,no.3. May-June 1981. #1:/Izett G. Collection-Mount St. Helens*msh198003e/msh00034 ID. Mount St. Helens - 34 Aerial view of eruptive activity of Mount St. Helens showing eruptive steam and ash clouds. Photo by Glen Izett. Skamania County, Washington. March 30, 1980. Published on p. 142-143 in U.S. Geological Survey. Earthquake information bulletin, v. 12,no.4. July-August 1980. #1:/Izett G. Collection-Mount St. Helens*msh198003e/msh00035 ID. Mount St. Helens - 35 Aerial view of eruptive activity of Mount St. Helens showing eruptive steam and ash clouds. Photo by Glen Izett. Skamania County, Washington. March 30, 1980. Published on p. 142-143 in Geological Survey. Earthquake information bulletin, v. 12,no.4. July-August 1980. #1:/Mount St. Helens*msh1980/msh00036 ID. Mount St. Helens - 36 Aerial view looking into the crater amphitheater from the north, showing the active inner vent. The crater is about 1.5 miles wide (east to west) and 2.5 miles long (north to south) the inner vent is about 1,000 feet across. Skamania County, Washington. 1980. Published on p. 220-221 in U.S. Geological Survey. Earthquake information bulletin, v. 12,no.6. November-December 1980. #1:/Mount St. Helens*msh198005/msh00037 ID. Mount St. Helens - 37 Remains of a 2-foot-thick pine snapped off by the May 18 eruption of Mount St. Helens volcano no Skamania County, Washington. May 18, 1980. (Reflection in photo). Published on back cover of U.S. Geological Survey. Earthquake information bulletin, v. 12, no.6. November-December 1980. #1:/Wallace R.E. Collection-Mount St. Helens*msh198004/msh00038 ID. Mount St. Helens - 38 Aerial view of crater of Mount St. Helens on April 17, 1980 showing the lava dome. The central plume is a bluish color suggesting the presence of particulate material, in contrast to the pure white steam on the flanks. Photo by R.E. Wallace. Skamania County, Washington. April 17, 1981. Published on p. 143 in U.S. Geological Survey. Earthquake information bulletin, v. 13,no.4. July-August 1981. #1:/Mount St. Helens*msh1980/msh00039 ID. Mount St. Helens - 39 Chart comparing plume elevation of various eruption of Mount St. Helens in 1980. Skamania County, Washington. 1980. Published on p. 97 in U.S. Geological Survey. Earthquake information bulletin, v. 13,no.3. May-June 1981. #1:/Leighley T. Collection-Mount St. Helens*msh1981/msh00040 ID. Mount St. Helens - 40 Aerial view of lava dome that developed in the crater of Mount St. Helens since the October 1980 eruption. The dome here is approximately 300 feet high and 800 feet across. Photo by Terry Leighley. Skamania County, Washington. January 7, 1981. Published on p. 98, upper photo, in U.S. Geological Survey. Earthquake information bulletin, v. 13,no.3. May-June 1981. #1:/Mount St. Helens*msh1980/msh00041 ID. Mount St. Helens - 41 A gas sampling tube is taped to the outside of the plane which daily flies through the plume to monitor the emission of carbon dioxide and sulphur dioxide. Washington. 1980. Published on p. 222, upper photo, in U.S. Geological Survey. Earthquake information bulletin, v. 12, no.6. November-December 1980. #1:/Mount St. Helens*msh1980/msh00042 ID. Mount St. Helens - 42 Geophysicist inside gas-sampling plane checks readout from chart recorder. Washington. 1980. Published on p. 222, lower photo, in U.S. Geological Survey. Earthquake information bulletin, v. 12, no.6. November-December 1980. #1:/Mount St. Helens*msh1980/msh00043 ID. Mount St. Helens - 43 Chart recorder used on gas sampling plane which daily monitors emission of carbon dioxide and sulphur dioxide from volcano no Washington. 1980. Portion published on p. 223 in U.S. Geological Survey. Earthquake information bulletin, v. 12, no.6. November-December 1980. #1:/Mount St. Helens*msh1980/msh00044 ID. Mount St. Helens - 44 Dawn to dusk activity in the crater is monitored at Vancouver via a television camera located on a ridge 5 miles north of the crater. Clark County, Washington. 1980. Published on p. 224, upper photo, in U.S. Geological Survey. Earthquake information bulletin, v. 12, no.6. November-December 1980. #1:/Spall H. Collection-Mount St. Helens*msh1980/msh00045 ID. Mount St. Helens - 45 Tiltmeters at five sites around the volcano no measure the east-west and north-south components of tilt, which are instantaneously displayed on the chart recorder at Vancouver. Photo by Henry Spall) Clark County, Washington. 1980. Published on p. 224, lower photo, in U.S. Geological Survey. Earthquake information bulletin. 12, no.6. November-December 1980. #1:/Mount St. Helens*msh1980/msh00046 ID. Mount St. Helens - 46 Intermittent harmonic tremor recorded in September on a seismograph on the east flank of the volcano. Skamania County, Washington. September 1980. Portion published on p. 225, upper left photo, in U.S. Geological Survey. Earthquake information bulletin, v. 12, no.6. November-December 1980. #1:/Spall H. Collection-Mount St. Helens*msh1980/msh00047 ID. Mount St. Helens - 47 Continuous harmonic tremor recorded by the University of Washington, Seattle, during the eruption of July 22, 1980. Photo by Henry Spall. King County, Washington. July 22, 1980. Portion published on p. 225, upper right photo, in U.S. Geological Survey. Earthquake information bulletin. 12, no.6. November-December 1980. #1:/Spall H. Collection-Mount St. Helens*msh198009/msh00048 ID. Mount St. Helens - 48 Press conference with Donald W. Peterson, Scientist-in-Charge of the Survey Office at Vancouver. Cameras and news people in foreground. Photo by Henry Spall. Clark County, Washington. September 26, 1980. Published on p. 225, lower photo, in U.S. Geological Survey. Earthquake information bulletin, v. 12, no.6. November-December 1980. #1:/Spall H. Collection-Mount St. Helens*msh1980/msh00049 ID. Mount St. Helens - 49 Office scene at the Vancouver office of the Survey. Clark County, Washington. 1980. Published on p. 226, upper photo, in U.S. Geological Survey. Earthquake information bulletin, v. 12, no.6. November-December 1980. #1:/Spall H. Collection-Mount St. Helens*msh1980/msh00050 ID. Mount St. Helens - 50 Helicopter used to transport ground parties at Mount St. Helens. Photo by H. Spall. Washington. 1980. Published on p. 226, lower left, in U.S. Geological Survey. Earthquake information bulletin, v. 12, no.6. November-December 1980. #1:/Spall H. Collection-Mount St. Helens*msh1980/msh00051 ID. Mount St. Helens - 51 Geologists Don Swanson (left) and another geologist discussing their work. Photo by H. Spall. Clark County, Washington. 1980. Published on p. 227, right photo, in U.S. Geological Survey. Earthquake information bulletin, v. 12, no.6. November-December 1980. #1:/Post A.S. Collection-Mount St. Helens*msh1980/msh00052 ID. Mount St. Helens - 52 Debris avalanche in the valley of the North Fork Toutle River, southwestern Washington. View east from near the distal margin of the avalanche toward the devastated cone of Mount St. Helens, which is partially obscured by clouds in the left background. Photo by A. Post. 1980. Published as figure 3 in U.S. Geological Survey. Yearbook. 1980. #1:/Waitt R.B. Collection-Mount St. Helens*msh1982/msh00053 ID. Mount St. Helens - 53 Mount St. Helens showing the lava dome and deposits that resulted from the eruptive activity of March-April 1982. This activity was the 12th eruption since May 18, 1980. It produced an avalanche of pumice, ice, and rock debris, followed by a mudflow, which flowed north from the crater to Spirit Lake and the North Fork of the Toutle River. Two lobes were added to the composite dome in the crater. Photograph by Richard B. Waitt. Skamania County, Washington. 1982. Published on p. 184 in U.S. Geological Survey. Earthquake information bulletin, v. 14, 5. September-October 1982. #1:/Krimmel R.M. Collection-Mount St. Helens*msh1982/msh00054 ID. Mount St. Helens - 54 Oblique aerial view from north looking across landscape into crater; steaming dome in center. Spirit Lake at left. Photo 82-S1-145 by Robert Krimmel. Skamania County, Washington. May 24, 1982. #1:/Krimmel R.M. Collection-Mount St. Helens*msh1982/msh00055 ID. Mount St. Helens - 55 Oblique aerial view of steaming dome - several different lobes apparent. Photo 82-S1-163 by Robert Krimmel. Skamania County, Washington. May 24, 1982. #1:/Krimmel R.M. Collection-Mount St. Helens*msh1982/msh00056 ID. Mount St. Helens - 56 Nearer oblique aerial view of Mount St. Helens from the northwest, showing crater and dome. Snow-capped Mount Hood in distance. Photo 82-S1-156 by Robert Krimmel. Skamania County, Washington and Hood River County, Oregon. May 24, 1982. #1:/Mount St. Helens*msh1978/msh00057 ID. Mount St. Helens - 57 Oblique aerial view from the south of Mount St. Helens, with Mt. Rainier partially visible in the background. Logged area visible in foreground. Skamania County, Washington. 1978. #1:/Mount St. Helens*msh198004/msh00058 ID. Mount St. Helens - 58 Oblique aerial view of the snow and glacier-covered Mount St. Helens prior to the catastrophic eruption of May 18, 1980. Streams and lava flows also visible. View is looking southerly. Skamania County, Washington. April 10, 1980. Published on page 9 in U.S. Geological Survey. Glaciers: Clues to Future Climates? by Richard S. Williams, Jr. 1984. #1:/Mount St. Helens*msh198005/msh00059 ID. Mount St. Helens - 59 Mount St. Helens in eruption, looking toward the southeast on May 18, 1980, with snow-covered Mount Hood on the distant horizon. Skamania County, Washington. Published on page 114 in U.S. Geological Survey. Earthquake information bulletin.v. 15, no.3. May-June 1983. Mount St. Helens #1:/Topinka L. Collection-Mount St. Helens*msh1983/msh00060 ID. Mount St. Helens - 60 Mount St. Helens from Harry's Ridge on the north showing the 200 foot high Pelean spine on the left side of the dome. Photo by Lyn Topinka. Skamania County, Washington. February 1983. Published on page 230 in U.S. Geological Survey. Earthquake information bulletin.v. 15, no.6. November-December 1983. #1:/Topinka L. Collection-Mount St. Helens*msh1983/msh00061 ID. Mount St. Helens - 61 The dome in the crater of Mount St. Helens showing the Pelean spine. Photo by Lyn Topinka. Skamania County, Washington. February 1983 Published on page 231 in U.S. Geological Survey. Earthquake information bulletin.v. 15, no.6. November-December 1983. #1:/Mount St. Helens*msh198005/mshct003 ID. Mount St. Helens - 3ct Eastern Washington resident sweeping ash from the May 18, 1980 eruption of Mount St. Helens from the roof of his house. Washington. After May 18, 1980. Lower photo, page 17 in U.S. Geological Survey. Eruptions of Mount St. Helens: Past, Present, and Future by Robert I. Tilling. 1984. #1:/U.S. Forrest Service Collection--Mount St. Helens*msh19800722/mshj0001 ID. MSHJ 1ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. General view of Mount St. Helens from the north between the 1st and 2nd eruptive pulses (17:57). Skamania County, Washington. (Photo by R. Hoblitt-U.S. Forrest Service) #1:/Doukas M.P. Collection-Mount St. Helens*msh19800722/mshj0002 ID. MSHJ 2ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. View of crater from the north between the 1st and 2nd eruptive pulses; note that the dome is still largely intact. Skamania County, Washington. (Photo by M. Doukas) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0003 ID. MSHJ 3ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Stereopair with slide no 4. showing the crater from the north at 17:56 between the 1st and 2nd eruptive pulses. Skamania County, Washington. (Photo by H. Glicken-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0004 ID. MSHJ 4ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Stereopair with slide no 3. showing the crater from the north at 17:56 between the 1st and 2nd eruptive pulses. Skamania County, Washington. (Photo by H. Glicken-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0005 ID. MSHJ 5ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slides no. 5 through 25 were taken between 18:25:20 and 18:26:30 This sequence was taken while moving counter-clockwise from the north to the west flank of Mount St. Helens at a distance of about 7 miles and while changing elevation from about 10,000 to 12,000 feet. The 2nd eruptive pulse begins with the appearance of a dark, ash-rich projection. the white cloud above the crater is a lingering remnant of the mild steam emmission that occurred between the 1st and 2nd eruptive pulses. (Wing of aircraft visible). Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service). 18:25:20. #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0006 ID. MSHJ 6ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slides no. 5 through 25 were taken between 18:25:20 and 18:26:30 This sequence was taken while moving counter-clockwise from the north to the west flank of Mount St. Helens at a distance of about 7 miles and while changing elevation from about 10,000 to 12,000 feet. Approximate 3 seconds after slide not 5. The plume grows. (Wing of aircraft visible). Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service). 18:25:23. #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0007 ID. MSHJ 7ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slides no. 5 through 25 were taken between 18:25:20 and 18:26:30 This sequence was taken while moving counter-clockwise from the north to the west flank of Mount St. Helens at a distance of about 7 miles and while changing elevation from about 10,000 to 12,000 feet. Approximate 3 seconds after slide no.6. The fountain of ash gives rise to a pyroclastic flow that sweeps over the ejecta rampart. (Wing of aircraft visible). Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service). 18:25:26. #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0008 ID. MSHJ 8ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slides no. 5 through 25 were taken between 18:25:20 and 18:26:30 This sequence was taken while moving counter-clockwise from the north to the west flank of Mount St. Helens at a distance of about 7 miles and while changing elevation from about 10,000 to 12,000 feet. Approximate 3 seconds after slide no.7. The projections of the eruption cloud evolve; the pyroclastic flow advances. (Wing of aircraft visible). Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service). 18:25:29. #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0009 ID. MSHJ 9ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slides no. 5 through 25 were taken between 18:25:20 and 18:26:30 This sequence was taken while moving counter-clockwise from the north to the west flank of Mount St. Helens at a distance of about 7 miles and while changing elevation from about 10,000 to 12,000 feet. Approximate 3 seconds after slide no.8. The projections of the eruption cloud continue to evolve; the pyroclastic flow advances. (Wing of aircraft visible). Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service). 18:25:32. #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0010 ID. MSHJ 10ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slides no. 5 through 25 were taken between 18:25:20 and 18:26:30 This sequence was taken while moving counter-clockwise from the north to the west flank of Mount St. Helens at a distance of about 7 miles and while changing elevation from about 10,000 to 12,000 feet. Approximate 3 seconds after slide no.9. The projections of the eruption cloud continue to evolve; the pyroclastic flow advances. (Wing of aircraft visible). Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service). 18:25:35. #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0011 ID. MSHJ 11ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slides no. 5 through 25 were taken between 18:25:20 and 18:26:30 This sequence was taken while moving counter-clockwise from the north to the west flank of Mount St. Helens at a distance of about 7 miles and while changing elevation from about 10,000 to 12,000 feet. Approximate 3 seconds after slide no. 10. The front of the pyroclastic flow develops three main lobes. (Wing of aircraft visible). Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service). 18:25:38. #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0012 ID. MSHJ 12ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slides no. 5 through 25 were taken between 18:25:20 and 18:26:30 This sequence was taken while moving counter-clockwise from the north to the west flank of Mount St. Helens at a distance of about 7 miles and while changing elevation from about 10,000 to 12,000 feet. Approximate 3 seconds after slide no. 11. Good illustration of "ash fountain" feeding material intot the advancing pyroclastic flow. (Wing of aircraft visible). Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service). 18:25:41. #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0013 ID. MSHJ 13ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slides no. 5 through 25 were taken between 18:25:20 and 18:26:30 This sequence was taken while moving counter-clockwise from the north to the west flank of Mount St. Helens at a distance of about 7 miles and while changing elevation from about 10,000 to 12,000 feet. Approximate 3 seconds after slide no. 12. The advancing pyroclastic flow front obscured behind cloud layer. (Wing of aircraft visible). Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service). 18:25:44. #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0014 ID. MSHJ 14ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slides no. 5 through 25 were taken between 18:25:20 and 18:26:30 This sequence was taken while moving counter-clockwise from the north to the west flank of Mount St. Helens at a distance of about 7 miles and while changing elevation from about 10,000 to 12,000 feet. Approximate 3 seconds after slide no. 13. (Wing of aircraft visible). Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service). 18:25:47. #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0015 ID. MSHJ 15ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slides no. 5 through 25 were taken between 18:25:20 and 18:26:30 This sequence was taken while moving counter-clockwise from the north to the west flank of Mount St. Helens at a distance of about 7 miles and while changing elevation from about 10,000 to 12,000 feet. Approximate 3 seconds after slide no. 14. (Wing of aircraft visible). Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service). 18:25:50. #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0016 ID. MSHJ 16ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slides no. 5 through 25 were taken between 18:25:20 and 18:26:30 This sequence was taken while moving counter-clockwise from the north to the west flank of Mount St. Helens at a distance of about 7 miles and while changing elevation from about 10,000 to 12,000 feet. Approximate 3 seconds after slide no. 15. View from northwest. Ash cloud rising above the pyroclastic flow now clearly visible. (Wing of aircraft visible). Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service). 18:25:53. #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0017 ID. MSHJ 17ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slides no. 5 through 25 were taken between 18:25:20 and 18:26:30 This sequence was taken while moving counter-clockwise from the north to the west flank of Mount St. Helens at a distance of about 7 miles and while changing elevation from about 10,000 to 12,000 feet. Approximate 3 seconds after slide no. 16. (Wing of aircraft visible). Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service). 18:25:56. #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0018 ID. MSHJ 18ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slides no. 5 through 25 were taken between 18:25:20 and 18:26:30 This sequence was taken while moving counter-clockwise from the north to the west flank of Mount St. Helens at a distance of about 7 miles and while changing elevation from about 10,000 to 12,000 feet. Approximate 3 seconds after slide no. 17. (Wing of aircraft visible). Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service). 18:25:59. #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0019 ID. MSHJ 19ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slides no. 5 through 25 were taken between 18:25:20 and 18:26:30 This sequence was taken while moving counter-clockwise from the north to the west flank of Mount St. Helens at a distance of about 7 miles and while changing elevation from about 10,000 to 12,000 feet. Approximate 3 seconds after slide no. 18. (Wing of aircraft visible). Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service). 18:25:62. #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0020 ID. MSHJ 20ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slides no. 5 through 25 were taken between 18:25:20 and 18:26:30 This sequence was taken while moving counter-clockwise from the north to the west flank of Mount St. Helens at a distance of about 7 miles and while changing elevation from about 10,000 to 12,000 feet. Approximately 3 seconds after slide no. 20. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service). 18:26:08. #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0021 ID. MSHJ 21ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slides no. 5 through 25 were taken between 18:25:20 and 18:26:30 This sequence was taken while moving counter-clockwise from the north to the west flank of Mount St. Helens at a distance of about 7 miles and while changing elevation from about 10,000 to 12,000 feet. Approximately 3 seconds after slide no. 20. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service). 18:26:08. #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0022 ID. MSHJ 22ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slides no. 5 through 25 were taken between 18:25:20 and 18:26:30 This sequence was taken while moving counter-clockwise from the north to the west flank of Mount St. Helens at a distance of about 7 miles and while changing elevation from about 10,000 to 12,000 feet. Approximately 3 seconds after slide no. 20. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service). 18:26:11. #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0023 ID. MSHJ 23ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slides no. 5 through 25 were taken between 18:25:20 and 18:26:30 This sequence was taken while moving counter-clockwise from the north to the west flank of Mount St. Helens at a distance of about 7 miles and while changing elevation from about 10,000 to 12,000 feet. Approximately 3 seconds after slide no. 20. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service). 18:26:14. #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0024 ID. MSHJ 24ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slides no. 5 through 25 were taken between 18:25:20 and 18:26:30 This sequence was taken while moving counter-clockwise from the north to the west flank of Mount St. Helens at a distance of about 7 miles and while changing elevation from about 10,000 to 12,000 feet. Approximately 3 seconds after slide no. 20. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service). 18:26:20. Vertical eruption column has developed. View from west. #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0025 ID. MSHJ 25ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slides no. 5 through 25 were taken between 18:25:20 and 18:26:30 This sequence was taken while moving counter-clockwise from the north to the west flank of Mount St. Helens at a distance of about 7 miles and while changing elevation from about 10,000 to 12,000 feet. Approximately 3 seconds after slide no. 20. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service). 18:26:30. #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0026 ID. MSHJ 26ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slides no. 5 through 25 were taken between 18:25:20 and 18:26:30 This sequence was taken while moving counter-clockwise from the north to the west flank of Mount St. Helens at a distance of about 7 miles and while changing elevation from about 10,000 to 12,000 feet. Approximately 3 seconds after slide no. 20. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service). 18:27. #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0027 ID. MSHJ 27ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slides no. 5 through 25 were taken between 18:25:20 and 18:26:30 This sequence was taken while moving counter-clockwise from the north to the west flank of Mount St. Helens at a distance of about 7 miles and while changing elevation from about 10,000 to 12,000 feet. Approximately 3 seconds after slide no. 20. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service). View of eruption at 18:27. Base of vertical column and elutriate cloud from pyroclastic flow rising through cloud layer. Mount Adams in background. Skamania County, Washington. #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0028 ID. MSHJ 28ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slides 28 through 37 show second eruptive pulse. This sequence was taken while moving counter-clockwise from the southwest to the south side of the mountain at a distance of 7 to 10 miles and while changing elevation from 12,000 to 15,000 feet. Note the bicolored appearance of the plume: the lighter portion is the ask cloud rising from the pyroclastic flows. View of eruption between 18:30 and 18:31. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service). #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0029 ID. MSHJ 29ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slides 28 through 37 show second eruptive pulse. This sequence was taken while moving counter-clockwise from the southwest to the south side of the mountain at a distance of 7 to 10 miles and while changing elevation from 12,000 to 15,000 feet. Note the bicolored appearance of the plume: the lighter portion is the ask cloud rising from the pyroclastic flows. View of eruption between 18:30 and 18:31. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service). #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0030 ID. MSHJ 30ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slides 28 through 37 show second eruptive pulse. This sequence was taken while moving counter-clockwise from the southwest to the south side of the mountain at a distance of 7 to 10 miles and while changing elevation from 12,000 to 15,000 feet. Note the bicolored appearance of the plume: the lighter portion is the ask cloud rising from the pyroclastic flows. View of eruption between 18:30 and 18:31. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service). #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0031 ID. MSHJ 31ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slides 28 through 37 show second eruptive pulse. This sequence was taken while moving counter-clockwise from the southwest to the south side of the mountain at a distance of 7 to 10 miles and while changing elevation from 12,000 to 15,000 feet. Note the bicolored appearance of the plume: the lighter portion is the ask cloud rising from the pyroclastic flows. View of eruption between 18:30 and 18:31. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service). #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0032 ID. MSHJ 32ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slides 28 through 37 show second eruptive pulse. This sequence was taken while moving counter-clockwise from the southwest to the south side of the mountain at a distance of 7 to 10 miles and while changing elevation from 12,000 to 15,000 feet. Note the bicolored appearance of the plume: the lighter portion is the ask cloud rising from the pyroclastic flows. View of eruption between 18:30 and 18:31. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service). #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0033 ID. MSHJ 33ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slides 28 through 37 show second eruptive pulse. This sequence was taken while moving counter-clockwise from the southwest to the south side of the mountain at a distance of 7 to 10 miles and while changing elevation from 12,000 to 15,000 feet. Note the bicolored appearance of the plume: the lighter portion is the ask cloud rising from the pyroclastic flows. View of eruption between 18:30 and 18:31. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service). #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0034 ID. MSHJ 34ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slides 28 through 37 show second eruptive pulse. This sequence was taken while moving counter-clockwise from the southwest to the south side of the mountain at a distance of 7 to 10 miles and while changing elevation from 12,000 to 15,000 feet. Note the bicolored appearance of the plume: the lighter portion is the ask cloud rising from the pyroclastic flows. View of eruption between 18:30 and 18:31. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service). #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0035 ID. MSHJ 35ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slides 28 through 37 show second eruptive pulse. This sequence was taken while moving counter-clockwise from the southwest to the south side of the mountain at a distance of 7 to 10 miles and while changing elevation from 12,000 to 15,000 feet. Note the bicolored appearance of the plume: the lighter portion is the ask cloud rising from the pyroclastic flows. View of eruption between 18:30 and 18:31. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service). #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0036 ID. MSHJ 36ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slides 28 through 37 show second eruptive pulse. This sequence was taken while moving counter-clockwise from the southwest to the south side of the mountain at a distance of 7 to 10 miles and while changing elevation from 12,000 to 15,000 feet. Note the bicolored appearance of the plume: the lighter portion is the ask cloud rising from the pyroclastic flows. View of eruption between 18:30 and 18:31. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service). #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0037 ID. MSHJ 37ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slides 28 through 37 show second eruptive pulse. This sequence was taken while moving counter-clockwise from the southwest to the south side of the mountain at a distance of 7 to 10 miles and while changing elevation from 12,000 to 15,000 feet. Note the bicolored appearance of the plume: the lighter portion is the ask cloud rising from the pyroclastic flows. View of eruption between 18:30 and 18:31. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service). #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0038 ID. MSHJ 38ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slides 28 through 37 show second eruptive pulse. This sequence was taken while moving counter-clockwise from the southwest to the south side of the mountain at a distance of 7 to 10 miles and while changing elevation from 12,000 to 15,000 feet. Note the bicolored appearance of the plume: the lighter portion is the ask cloud rising from the pyroclastic flows. 18:43 second eruptive pulse as seen from south. Skamania County, Washington. (Photo by R. Hoblitt-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0039 ID. MSHJ 39ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slides 28 through 37 show second eruptive pulse. This sequence was taken while moving counter-clockwise from the southwest to the south side of the mountain at a distance of 7 to 10 miles and while changing elevation from 12,000 to 15,000 feet. Note the bicolored appearance of the plume: the lighter portion is the ask cloud rising from the pyroclastic flows. 18:43 second eruptive pulse as seen from south. Skamania County, Washington. (Photo by R. Hoblitt-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0040 ID. MSHJ 40ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slides 28 through 37 show second eruptive pulse. This sequence was taken while moving counter-clockwise from the southwest to the south side of the mountain at a distance of 7 to 10 miles and while changing elevation from 12,000 to 15,000 feet. Note the bicolored appearance of the plume: the lighter portion is the ask cloud rising from the pyroclastic flows. 18:43 second eruptive pulse as seen from south. Skamania County, Washington. (Photo by H. Glicken-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0041 ID. MSHJ 41ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slides 28 through 37 show second eruptive pulse. This sequence was taken while moving counter-clockwise from the southwest to the south side of the mountain at a distance of 7 to 10 miles and while changing elevation from 12,000 to 15,000 feet. Note the bicolored appearance of the plume: the lighter portion is the ask cloud rising from the pyroclastic flows. 18:43 second eruptive pulse as seen from south. Skamania County, Washington. (Photo by M. Doukas-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0042 ID. MSHJ 42ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slides 28 through 37 show second eruptive pulse. This sequence was taken while moving counter-clockwise from the southwest to the south side of the mountain at a distance of 7 to 10 miles and while changing elevation from 12,000 to 15,000 feet. Note the bicolored appearance of the plume: the lighter portion is the ask cloud rising from the pyroclastic flows. 19:00 just prior to the third eruptive pulse. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0043 ID. MSHJ 43ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slide no. 43 through no. 62 show the third eruptive pulse. this sequence was taken while moving clockwise from the west to the north side of the mountain at a distance of 7 to 10 miles and at an elevation of 17,000 feet. 19:01 the pyroclastic flow advances northward. Note lobate flow front. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0044 ID. MSHJ 44ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slide no. 43 through no. 62 show the third eruptive pulse. this sequence was taken while moving clockwise from the west to the north side of the mountain at a distance of 7 to 10 miles and at an elevation of 17,000 feet. View of eruption at 19:01. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0045 ID. MSHJ 45ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slide no. 43 through no. 62 show the third eruptive pulse. this sequence was taken while moving clockwise from the west to the north side of the mountain at a distance of 7 to 10 miles and at an elevation of 17,000 feet. View of eruption at 19:01. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0046 ID. MSHJ 46ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slide no. 43 through no. 62 show the third eruptive pulse. this sequence was taken while moving clockwise from the west to the north side of the mountain at a distance of 7 to 10 miles and at an elevation of 17,000 feet. View of eruption at 19:01. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0047 ID. MSHJ 47ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slide no. 43 through no. 62 show the third eruptive pulse. this sequence was taken while moving clockwise from the west to the north side of the mountain at a distance of 7 to 10 miles and at an elevation of 17,000 feet. View of eruption at 19:01, the pyroclastic flow front extends underneath the cloud layer. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0048 ID. MSHJ 48ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slide no. 43 through no. 62 show the third eruptive pulse. this sequence was taken while moving clockwise from the west to the north side of the mountain at a distance of 7 to 10 miles and at an elevation of 17,000 feet. View of eruption at 19:01. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0049 ID. MSHJ 49ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slide no. 43 through no. 62 show the third eruptive pulse. this sequence was taken while moving clockwise from the west to the north side of the mountain at a distance of 7 to 10 miles and at an elevation of 17,000 feet. View of eruption at 19:01. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0050 ID. MSHJ 50ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slide no. 43 through no. 62 show the third eruptive pulse. this sequence was taken while moving clockwise from the west to the north side of the mountain at a distance of 7 to 10 miles and at an elevation of 17,000 feet. View of eruption at 19:01. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0051 ID. MSHJ 51ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slide no. 43 through no. 62 show the third eruptive pulse. this sequence was taken while moving clockwise from the west to the north side of the mountain at a distance of 7 to 10 miles and at an elevation of 17,000 feet. View of eruption at 19:02. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0052 ID. MSHJ 52ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slide no. 43 through no. 62 show the third eruptive pulse. this sequence was taken while moving clockwise from the west to the north side of the mountain at a distance of 7 to 10 miles and at an elevation of 17,000 feet. View of eruption at 19:03, the plume develops a mushroom-like head while the elutriate cloud from the pyroclastic flow billows up through the cloud layer. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0053 ID. MSHJ 53ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slide no. 43 through no. 62 show the third eruptive pulse. this sequence was taken while moving clockwise from the west to the north side of the mountain at a distance of 7 to 10 miles and at an elevation of 17,000 feet. View of eruption at 19:03. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0054 ID. MSHJ 54ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slide no. 43 through no. 62 show the third eruptive pulse. this sequence was taken while moving clockwise from the west to the north side of the mountain at a distance of 7 to 10 miles and at an elevation of 17,000 feet. View of eruption at 19:03. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0055 ID. MSHJ 55ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slide no. 43 through no. 62 show the third eruptive pulse. this sequence was taken while moving clockwise from the west to the north side of the mountain at a distance of 7 to 10 miles and at an elevation of 17,000 feet. View of eruption at 19:03. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0056 ID. MSHJ 56ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slide no. 43 through no. 62 show the third eruptive pulse. this sequence was taken while moving clockwise from the west to the north side of the mountain at a distance of 7 to 10 miles and at an elevation of 17,000 feet. View of eruption at 19:04. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0057 ID. MSHJ 57ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slide no. 43 through no. 62 show the third eruptive pulse. this sequence was taken while moving clockwise from the west to the north side of the mountain at a distance of 7 to 10 miles and at an elevation of 17,000 feet. View of eruption at 19:04. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0058 ID. MSHJ 58ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slide no. 43 through no. 62 show the third eruptive pulse. this sequence was taken while moving clockwise from the west to the north side of the mountain at a distance of 7 to 10 miles and at an elevation of 17,000 feet. View of eruption between 19:04 and 19:05. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0059 ID. MSHJ 59ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slide no. 43 through no. 62 show the third eruptive pulse. this sequence was taken while moving clockwise from the west to the north side of the mountain at a distance of 7 to 10 miles and at an elevation of 17,000 feet. View of eruption between 19:04 and 19:05. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0060 ID. MSHJ 60ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slide no. 43 through no. 62 show the third eruptive pulse. this sequence was taken while moving clockwise from the west to the north side of the mountain at a distance of 7 to 10 miles and at an elevation of 17,000 feet. View of eruption 19:06. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0061 ID. MSHJ 61ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slide no. 43 through no. 62 show the third eruptive pulse. this sequence was taken while moving clockwise from the west to the north side of the mountain at a distance of 7 to 10 miles and at an elevation of 17,000 feet. View of eruption 19:06. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0062 ID. MSHJ 62ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Slide no. 43 through no. 62 show the third eruptive pulse. this sequence was taken while moving clockwise from the west to the north side of the mountain at a distance of 7 to 10 miles and at an elevation of 17,000 feet. View of eruption 19:06. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0063 ID. MSHJ 63ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 19:10 the elutriate cloud from the pyroclastic flow and the lower part of the eruption pume as seen from the north. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0064 ID. MSHJ 64ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Steropair with slide no. 65 taken at 19:11. The plume encounters an atmospheric boundary and is planed off into an anvil shape at about 60,000 feet. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0065 ID. MSHJ 65ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. Steropair with slide no. 64 taken at 19:11. The plume encounters an atmospheric boundary and is planed off into an anvil shape at about 60,000 feet. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0066 ID. MSHJ 66ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 18:56 amphithearter seen from the north about 5 minutes prior to third eruptive pulse. Skamania County, Washington. (Photo by H. Glicken-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0067 ID. MSHJ 67ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 19:00 amphithearter seen from the north about 1 minute prior to third eruptive pulse. Skamania County, Washington. (Photo by H. Glicken-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0068 ID. MSHJ 68ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 18:59 following second eruptive pulse the dome has either been destroyer or buried by ejecta. Skamania County, Washington. (Photo by H. Glicken-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0069 ID. MSHJ 69ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 19:00:59 start of third eruptive pulse and first indication of pyroclastic flow appears over rampart. Pyroclastic flow develops from ash fountain. Skamania County, Washington. (Photo by R. Hoblitt-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0070 ID. MSHJ 70ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 19:01 pyroclastic flow continues to develop, ash fountain increases. Skamania County, Washington. (Photo by R. Hoblitt-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0071 ID. MSHJ 71ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 19:01 pyroclastic flow continues to develop, ash fountain increases. Skamania County, Washington. (Photo by R. Hoblitt-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0072 ID. MSHJ 72ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 19:01 pyroclastic flow continues its advance as helicopter moves to west. Skamania County, Washington. (Photo by H. Glicken-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0073 ID. MSHJ 73ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 19:01 pyroclastic flow continues its advance as helicopter moves to west. Skamania County, Washington. (Photo by H. Glicken-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0074 ID. MSHJ 74ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 19:01 pyroclastic flow continues its advance as helicopter moves to west. Skamania County, Washington. (Photo by H. Glicken-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0075 ID. MSHJ 75ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 19:01 pyroclastic flow continues its advance as helicopter moves to west. Skamania County, Washington. (Photo by H. Glicken-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0076 ID. MSHJ 76ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 19:01 pyroclastic flow continues its advance as helicopter moves to west. Skamania County, Washington. (Photo by H. Glicken-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0077 ID. MSHJ 77ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 19:01 pyroclastic flow continues its advance as helicopter moves to west. Skamania County, Washington. (Photo by H. Glicken-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0078 ID. MSHJ 78ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 19:01 pyroclastic flow continues its advance as helicopter moves to west. Skamania County, Washington. (Photo by M. Doukas-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0079 ID. MSHJ 79ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 19:01 pyroclastic flow continues its advance as helicopter moves to west. Skamania County, Washington. (Photo by M. Doukas-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0080 ID. MSHJ 80ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 19:01 pyroclastic flow continues its advance as helicopter moves to west. Skamania County, Washington. (Photo by H. Glicken-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0081 ID. MSHJ 81ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 19:01 pyroclastic flow continues its advance as helicopter moves to west. Skamania County, Washington. (Photo by H. Glicken-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0082 ID. MSHJ 82ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 19:01 pyroclastic flow continues its advance as helicopter moves to west. Skamania County, Washington. (Photo by H. Glicken-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0083 ID. MSHJ 83ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 19:01 pyroclastic flow continues its advance as helicopter moves to west. Skamania County, Washington. (Photo by H. Glicken-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0084 ID. MSHJ 84ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 19:01 pyroclastic flow continues its advance as helicopter moves to west. Skamania County, Washington. (Photo by H. Glicken-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0085 ID. MSHJ 85ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 19:05 third eruptive pulse, view from west. Skamania County, Washington. (Photo by H. Glicken-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0086 ID. MSHJ 86ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 19:05 third eruptive pulse, view from west. Skamania County, Washington. (Photo by H. Glicken-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0087 ID. MSHJ 87ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 19:05 third eruptive pulse, view from west. Skamania County, Washington. (Photo by H. Glicken-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0088 ID. MSHJ 88ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 19:08 third eruptive pulse, view from west. Skamania County, Washington. (Photo by H. Glicken-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0089 ID. MSHJ 89ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 19:09 third eruptive pulse, view from west. Skamania County, Washington. (Photo by H. Glicken-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0090 ID. MSHJ 90ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 19:16:48 eruptive pulse, view from west. Skamania County, Washington. (Photo by R. Hoblitt-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0091 ID. MSHJ 91ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 19:16:52 eruption plume of third pulse rises in clockwise helix as ask curtains fall from it. Skamania County, Washington. (Photo by R. Hoblitt-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0092 ID. MSHJ 92ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 19:18:25 new pyroclastic flow deposits from third eruptive pulse cover crater floor. Skamania County, Washington. (Photo by R. Hoblitt-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0093 ID. MSHJ 93ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 19:23:22 eruption plume originates at former site of dome. Skamania County, Washington. (Photo by R. Hoblitt-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0094 ID. MSHJ 94ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 19:23:27 crater and plume. Skamania County, Washington. (Photo by R. Hoblitt-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0095 ID. MSHJ 95ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 19:26:46 crater and plume. Skamania County, Washington. (Photo by R. Hoblitt-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0096 ID. MSHJ 96ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 19:17 approximately; small pyroclastic flow advances short distance beyond ejecta rampart. Skamania County, Washington. (Photo by R. Hoblitt-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0097 ID. MSHJ 97ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 19:17 approximately; small pyroclastic flow advances short distance beyond ejecta rampart. Skamania County, Washington. (Photo by R. Hoblitt-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0098 ID. MSHJ 98ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 19:18 approximately; activity after third eruptive pulse. Skamania County, Washington. (Photo by R. Hoblitt-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0099 ID. MSHJ 99ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 19:33:28 toes of new pyroclastic flow deposits northwest of crater; note ash cloud deposits on Ice side of flow deposits. Skamania County, Washington. (Photo by R. Hoblitt-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0100 ID. MSHJ 100ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 19:34:40 Don Swanson samples a new pyroclastic flow deposit. Skamania County, Washington. (Photo by R. Hoblitt-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0101 ID. MSHJ 101ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 19:35 approximately; Don Swanson examines a new pyroclastic flow deposit. Skamania County, Washington. (Photo by M. Doukas-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0102 ID. MSHJ 102ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 19:48:10 helicopter inspects crater. Skamania County, Washington. (Photo by R. Hoblitt-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0103 ID. MSHJ 103ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 19:37 approximately; Rick Hoblitt measures the temperature of a fresh pyroclastic flow. Skamania County, Washington. (Photo by M. Doukas-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0104 ID. MSHJ 104ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 20:36 Mount St. Helens from the south at sunset; activity has diminished. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0105 ID. MSHJ 105ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 20:53 Mount St. Helens from the west; moderating activity at sunset. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0106 ID. MSHJ 106ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 20:55 Mount St. Helens from the northwest; moderating activity at sunset. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0107 ID. MSHJ 107ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 2#1:01 Mount St. Helens from the northwest; moderating activity at sunset. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0108 ID. MSHJ 108ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 2#1:07 Mount St. Helens from the south, at sunset. Skamania County, Washington. (Photo by J. Vallance-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0109 ID. MSHJ 109ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 20:5#1:12 ash plume drifts to northeast as sun sets. Skamania County, Washington. (Photo by R. Hoblitt-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0110 ID. MSHJ 110ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 20:54:00 looking northeast at ash plume at dusk. Skamania County, Washington. (Photo by R. Hoblitt-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0111 ID. MSHJ 111ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 20:54:11 ash plume detail at dusk. Skamania County, Washington. (Photo by R. Hoblitt-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0112 ID. MSHJ 112ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 20:55:10 Mount St. Helens seen from north at dusk, moon in the background. Skamania County, Washington. (Photo by R. Hoblitt-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0113 ID. MSHJ 113ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 20:59:49 declining eruptive activity at dusk. Skamania County, Washington. (Photo by R. Hoblitt-U.S. Forrest Service) #1:/U.S. Forrest Service Collection-Mount St. Helens*msh19800722/mshj0114 ID. MSHJ 114ct These slides of the July 22, 1980 eruption of Mount St. Hellens were taken by Jim Vallance, who was in a U.S. Forest Service fixed wing aircraft and by Mike Doukas, Harry Glicken, and Rick Hoblitt who were in a U.S. Geological Survey helicopter. There were three major eruptive pulses on July 22, 1980. They begin at 17:14, 18:30 and 19:02 PDT. 2#1:10:17 moon over Mount St. Helens in eruption. Skamania County, Washington. (Photo by R. Hoblitt-U.S. Forrest Service) #1:/Krimmel R.M. Collection-Mount St. Helens*msh198005b/mshpp001 ID. Mount St. Helens - PP 1249 1 Aerial photograph of the northeastern side of Mount St. Helens shows conditions on May 17, the day before the devastating eruption. This quiet scene belies the forthcoming lateral blast. Dark streaks on either side of Sugar Bowl are deposits from avalanches of ice and rock caused by earthquakes and the increased breakup of the northern slope. Photo by R.M. Krimmel. Skamania County, Washington. May 17, 1980. Figure 18, U.S. Geological Survey Professional Paper 1249. #1:/NOAA Collection-Mount St. Helens*msh198005m/mshpp002 ID. Mount St. Helens - PP 1249 2 Satellite pictures showing the eastward spread of the ash plume from the May 18 eruption of Mount St. Helens, which began at 832 a.m., Pacific Daylight Time. A, By 845 a.m. (eruption plus 13 minutes), the eruption cloud (shown by arrow on published photo only) was already large enough to be seen clearly in the image from a satellite more than 22,000 miles above the earth. B, By 915 a.m. (E plus 43 minutes), the eruption clout was spreading rapidly, still expanding in all directions from the volcano. C, By 1015 a.m. (E plus 1 hour, 43 minutes), the ash had expanded eastward across the Cascade Range into eastern Washington, reaching beyond Yakima. D, By 1215 p.m. (E plus 3 hours, 43 minutes), the ash was falling on Spokane and had extended into Idaho. A dense ash cloud from the continuing eruption persisted near the volcano. Photographs from the National Oceanic and Atmospheric Administration. Washington and Idaho. May 18, 1980. Figures 29-A-D, U.S. Geological Survey. Professional Paper 1249. #1:/NOAA Collection-Mount St. Helens*msh198005m/mshpp003 ID. Mount St. Helens - PP 1249 3 Satellite pictures showing the eastward spread of the ash plume from the May 18 eruption of Mount St. Helens, which began at 832 a.m., Pacific Daylight Time. A, By 845 a.m. (eruption plus 13 minutes), the eruption cloud (shown by arrow on published photo only) was already large enough to be seen clearly in the image from a satellite more than 22,000 miles above the earth. B, By 915 a.m. (E plus 43 minutes), the eruption clout was spreading rapidly, still expanding in all directions from the volcano. C, By 1015 a.m. (E plus 1 hour, 43 minutes), the ash had expanded eastward across the Cascade Range into eastern Washington, reaching beyond Yakima. D, By 1215 p.m. (E plus 3 hours, 43 minutes), the ash was falling on Spokane and had extended into Idaho. A dense ash cloud from the continuing eruption persisted near the volcano. Photographs from the National Oceanic and Atmospheric Administration. Washington and Idaho. May 18, 1980. Figures 29-A-D, U.S. Geological Survey Professional Paper 1249. #1:/NOAA Collection-Mount St. Helens*msh198005m/mshpp004 ID. Mount St. Helens - PP 1249 4 Satellite pictures showing the eastward spread of the ash plume from the May 18 eruption of Mount St. Helens, which began at 832 a.m., Pacific Daylight Time. A, By 845 a.m. (eruption plus 13 minutes), the eruption cloud (shown by arrow on published photo only) was already large enough to be seen clearly in the image from a satellite more than 22,000 miles above the earth. B, By 915 a.m. (E plus 43 minutes), the eruption clout was spreading rapidly, still expanding in all directions from the volcano. C, By 1015 a.m. (E plus 1 hour, 43 minutes), the ash had expanded eastward across the Cascade Range into eastern Washington, reaching beyond Yakima. D, By 1215 p.m. (E plus 3 hours, 43 minutes), the ash was falling on Spokane and had extended into Idaho. A dense ash cloud from the continuing eruption persisted near the volcano. Photographs from the National Oceanic and Atmospheric Administration. Washington and Idaho. May 18, 1980. Figures 29-A-D, U.S. Geological Survey Professional Paper 1249. #1:/NOAA Collection-Mount St. Helens*msh198005m/mshpp005 ID. Mount St. Helens - PP 1249 5 Satellite pictures showing the eastward spread of the ash plume from the May 18 eruption of Mount St. Helens, which began at 832 a.m., Pacific Daylight Time. A, By 845 a.m. (eruption plus 13 minutes), the eruption cloud (shown by arrow on published photo only) was already large enough to be seen clearly in the image from a satellite more than 22,000 miles above the earth. B, By 915 a.m. (E plus 43 minutes), the eruption clout was spreading rapidly, still expanding in all directions from the volcano. C, By 1015 a.m. (E plus 1 hour, 43 minutes), the ash had expanded eastward across the Cascade Range into eastern Washington, reaching beyond Yakima. D, By 1215 p.m. (E plus 3 hours, 43 minutes), the ash was falling on Spokane and had extended into Idaho. A dense ash cloud from the continuing eruption persisted near the volcano. Photographs from the National Oceanic and Atmospheric Administration. Washington and Idaho. May 18, 1980. Figures 29-A-D, U.S. Geological Survey Professional Paper 1249. #1:/Post A.S. Collection-Mount St. Helens*msh198006/mshpp006 ID. Mount St. Helens - PP 1249 6 Within a few minutes, hurricane-force winds from the May 18 lateral blast of Mount St. Helens transformed vast stands of evergreen forest into drab tangles of giant matchsticks. The trees were stripped of their branches, toppled, and "combed" into patterns. The logging roads shown here are about 12 feet across. This view is near Elk Rock looking east. Photo by A. Post. Cowlitz County, Washington. June 30, 1980. Figure 34, U.S. Geological Survey Professional Paper 1249. #1:/Molenaar D. Collection-Mount St. Helens*msh198006/mshpp007 ID. Mount St. Helens - PP 1249 7 Relief map of the Mount St. Helens vicinity after the devastating May 18 eruption labeled to show features such as crater, mudflows, pyroclastic flows. Debris flows and avalanches, tree-blowdown area, scorched zone, "new" Spirit Lake, ponds created by debris dams. Painting by Dee Molenaar. Skamania and Cowlitz Counties, Washington. 1980. Figure 45, U.S. Geological Survey Professional Paper 1249. #1:/Mount Collection-Post A.S.C.collection-Mount St. Helens*msh198006/mshpp008 ID. Mount St. Helens - PP 1249 8 Aerial photograph of Mount St. Helens taken from about 7 miles to the north- northwest, looking over the site of the demolished Coldwater II observation post (marked by an X on published photo only) and debris avalanche deposits in the eastern part of the North Fork Toutle River valley. Photo by A. Post. Skamania County, Washington. June 30, 1980. Figure 51, U.S. Geological Survey Professional Paper 1249. #1:/Mount St. Helens*msh198006/mshpp009 ID. Mount St. Helens - PP 1249 9 Scientist aims a laser beam at one of several reflecting targets on steaming Mount St. Helens to measure precisely any change in distance that might indicate swelling of the mountain or provide other clues to the likelihood of an eruption. This instrument site is about 5 miles north of the crater floor on a ridge informally called "Harrys Ridge" because it overlooks the former location of Mount St. Helens Lodge (out of view to the left), where proprietor Harry Truman presumably died during the May 18 eruption. Skamania County, Washington. 1980. Figure 52, U.S. Geological Survey Professional Paper 1249. #1:/Mount St. Helens*msh198006/mshpp010 ID. Mount St. Helens - PP 1249 10 Aerial view of Mount St. Helens across the devastated area from about 13 miles to the north-northwest. The viewpoint is well within the area of blown-down trees. Elk Lake (lower center) and the quarter-mile-long Hannaford Lake (center) are among about 30 small lakes and ponds, formerly jewel like in forested settings, that were turned brown and desolate by blast and ash fall in a few minutes. Coldwater II observation station, where David Johnston was on duty at the time of the May 18 blast, is at right center. Skamania County, Washington. June 30, 1980. Figure 56, U.S. Geological Survey Professional Paper 1249. #1:/Post A.S. Collection-Mount St. Helens*msh198006/mshpp011 ID. Mount St. Helens - PP 1249 11 Effects of the Mount St. Helens eruptions in the upper valley of the South Fork Toutle River. Aerial photograph of mudflow deposits on the valley floor looking east toward steaming Mount St. Helens. Mount Adams in the distance. Photo by A. Post. Skamania and Cowlitz Counties, Washington. June 30, 1980. Figure 58-A, U S. Geological Survey Professional Paper 1249. #1:/Post A.S. Collection-Mount St. Helens*msh198006/mshpp012 ID. Mount St. Helens - PP 1249 12 Debris from the May 18 eruption in tile valley of the North Fork Toutle River. Aerial view eastward up the debris-choked valley toward steaming Mount St. Helens (the edge of the crater mouth is barely visible). This area is near the southern fringe of the blast zone. Photo by A. Post and R.M. Krimmel. Skamania and Cowlitz Counties, Washington. June 30, 1980. Figure 59-A, U.S. Geological Survey Professional Paper 1249. 1982; as figure 214 in Professional Paper 1250. 1981; as cover of Circular 850-A. 1980. #1:/Shulter M.V. Collection-Mount St. Helens*msh198005/msmv0001 ID. Mount St. Helens - Shulter, M.V. 1 Mount St. Helens, ejecting ash on May 18. Ash from this eruption drifted eastward, whereas on March 30 the ash drifted south toward Mount Hood, Oregon (shown in background) and the Bull Run watershed. Skamania County, Washington and Hood River County, Oregon. May 18, 1980. Portion published as figure 1 in U.S. Geological Survey. Circular 850-A. 1980. #1:/Schuster R.L. Collection-Mount St. Helens/msrl0001 ID. Mount St. Helens - Schuster, R.L. 1 Dredge working in Columbia River near Longview, Washington, west of Mount St. Helens. July 2, 1980. #1:/Schuster R.L. Collection-Mount St. Helens/msrl0002 ID. Mount St. Helens - Schuster, R.L. 2 Dredge working in Columbia River near Longview, Washington, west of Mount St. Helens. July 2, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0003 ID. Mount St. Helens - Schuster, R.L. 3 Dredge working in Columbia River near Longview, Washington, west of Mount St. Helens. July 2, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0004 ID. Mount St. Helens - Schuster, R.L. 4 Cowlitz River at Longview-Kelso, west of Mount St. Helens. Note dredge working on "mud" in the river. Cowlitz County, Washington. July 2, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0005 ID. Mount St. Helens - Schuster, R.L. 5 Cowlitz River just upstream from Kelso and Longview, west of Mount St. Helens. Light area is covered with mud. Cowlitz County, Washington. July 2, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0006 ID. Mount St. Helens - Schuster, R.L. 6 Tower Road bridge, North Fork Toutle River, north of Mount St. Helens. Cowlitz County, Washington. July 2, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0007 ID. Mount St. Helens - Schuster, R.L. 7 Tower Road bridge, North Fork Toutle River, north of Mount St. Helens. Cowlitz County, Washington. July 2, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0008 ID. Mount St. Helens - Schuster, R.L. 8 Damaged homes on North Fork Toutle River, north of Mount St. Helens, upstream from Tower Road bridge. Cowlitz County, Washington. July 2, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0009 ID. Mount St. Helens - Schuster, R.L. 9 Railroad logging cars buried in mud at Camp Baker, west of Mount St. Helens. Cowlitz County, Washington. July 2, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0010 ID. Mount St. Helens - Schuster, R.L. 10 Green River hatchery, north of Mount St. Helens. Cowlitz County, Washington. July 2, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0011 ID. Mount St. Helens - Schuster, R.L. 11 St. Helens bridge, north of Mount St. Helens. Cowlitz County, Washington. July 2, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0012 ID. Mount St. Helens - Schuster, R.L. 12 St. Helens bridge, north of Mount St. Helens. Cowlitz County, Washington. July 2, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0013 ID. Mount St. Helens - Schuster, R.L. 13 St. Helens bridge in mudflow, North Fork Toutle River, north of Mount St. Helens. Cowlitz County, Washington. July 5, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0014 ID. Mount St. Helens - Schuster, R.L. 14 St. Helens bridge in mudflow, North Fork Toutle River, north of Mount St. Helens. Cowlitz County, Washington. July 5, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0015 ID. Mount St. Helens - Schuster, R.L. 15 Bridge washed out on SR 504 near Camp Baker, northwest of Mount St. Helens. Cowlitz County, Washington. July 5, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0016 ID. Mount St. Helens - Schuster, R.L. 16 Debris across SR 504 near Camp Baker, northwest of Mount St. Helens. Cowlitz County, Washington. July 5, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0017 ID. Mount St. Helens - Schuster, R.L. 17 St. Helens bridge in mudflow, North Fork Toutle River, north of Mount St. Helens. Cowlitz County, Washington. July 5, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0018 ID. Mount St. Helens - Schuster, R.L. 18 Logging trailer near Camp Baker, northwest of Mount St. Helens. Cowlitz County, Washington. July 5, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0019 ID. Mount St. Helens - Schuster, R.L. 19 Damaged railroad track near Camp Baker, northwest of Mount St. Helens. Cowlitz County, Washington. July 5, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0020 ID. Mount St. Helens - Schuster, R.L. 20 Damaged building at Camp Baker, northwest of Mount St. Helens. Cowlitz County, Washington. July 5, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0021 ID. Mount St. Helens - Schuster, R.L. 21 Road dug out of mudflow at Camp Baker, northwest of Mount St. Helens. Cowlitz County, Washington. July 5, 1980. #1:/Schuster R.L. Collection-Mount St. Helens/msrl0022 ID. Mount St. Helens - Schuster, R.L. 22 Damaged building at Camp Baker, northwest of Mount St. Helens. Cowlitz County, Washington. July 5, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0023 ID. Mount St. Helens - Schuster, R.L. 23 Damaged building at Camp Baker, northwest of Mount St. Helens. Cowlitz County, Washington. July 5, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0024 ID. Mount St. Helens - Schuster, R.L. 24 Logging cars mired in mud at Camp Baker, northwest of Mount St. Helens. Cowlitz County, Washington. July 5, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0025 ID. Mount St. Helens - Schuster, R.L. 25 On mudflow on North Fork Toutle River about 3 miles east of Camp Baker, northwest of Mount St. Helens. Cowlitz County, Washington. July 5, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0026 ID. Mount St. Helens - Schuster, R.L. 26 Devastation along North Fork Toutle River about 3 miles east of Camp Baker, northwest of Mount St. Helens. Cowlitz County, Washington. July 5, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0027 ID. Mount St. Helens - Schuster, R.L. 27 On lower end of debris flow about 3 miles east of Camp Baker, northwest of Mount St. Helens Cowlitz County, Washington. July 5, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0028 ID. Mount St. Helens - Schuster, R.L. 28 On lower end of debris flow about 3 miles east of Camp Baker. Cowlitz County, Washington. July 5, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0029 ID. Mount St. Helens - Schuster, R.L. 29 On lower end of debris flow about 3 miles east of Camp Baker. Cowlitz County, Washington. July 5, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0030 ID. Mount St. Helens - Schuster, R.L. 30 Blast damage along North Fork Toutle River about 3 miles east of Camp Baker. Cowlitz County, Washington. July 5, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0031 ID. Mount St. Helens - Schuster, R.L. 31 Disabled station wagon on SR 504 2 miles east of Camp Baker. Cowlitz County, Washington. July 5, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0032 ID. Mount St. Helens - Schuster, R.L. 32 Intact (but damaged) bridge on SR 504 near Camp Baker, northwest of Mount St. Helens. Cowlitz County, Washington. July 5, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0033 ID. Mount St. Helens - Schuster, R.L. 33 Weyerhaeuser bus in mudflow near Camp Baker, northwest of Mount St. Helens. Cowlitz County, Washington. July 5, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0034 ID. Mount St. Helens - Schuster, R.L. 34 Looking upstream from Kid Valley bridge, SR 504, North Fork Toutle River, north of Mount St. Helens. Note high mudflow line on trees and river bank. Cowlitz County, Washington. July 5, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0035 ID. Mount St. Helens - Schuster, R.L. 35 Kid Valley bridge, SR 504, North Fork Toutle River, north of Mount St. Helens. This high bridge was not damaged by the mudflow. Cowlitz County, Washington. July 5, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0036 ID. Mount St. Helens - Schuster, R.L. 36 Kid Valley bridge, SR 504, North Fork Toutle River, north of Mount St. Helens. This high bridge was not damaged by the mudflow. Cowlitz County, Washington. July 5, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0037 ID. Mount St. Helens - Schuster, R.L. 37 Weyerhaeuser bridge over North Fork Toutle River near Kid Valley, north of Mount St. Helens. Cowlitz County, Washington. July 5, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0038 ID. Mount St. Helens - Schuster, R.L. 38 Weyerhaeuser bridge over North Fork Toutle River near Kid Valley, north of Mount St. Helens. Logging camp in background. Cowlitz County, Washington. July 5, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0039 ID. Mount St. Helens - Schuster, R.L. 39 Looking upstream toward Coalbanks bridge, SR 504, North Fork Toutle River, north of Mount St. Helens. Note mudflow line on tree in foreground. Cowlitz County, Washington. July 7, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0040 ID. Mount St. Helens - Schuster, R.L. 40 House buried by mudflow on South Fork Toutle River, west of Mount St. Helens. Cowlitz County, Washington. July 7, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0041 ID. Mount St. Helens - Schuster, R.L. 41 County bridge over South Fork Toutle River, west of Mount St. Helens. Note marks from muddy logs that hit bottom of girder. Cowlitz County, Washington. July 7, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0042 ID. Mount St. Helens - Schuster, R.L. 42 County bridge over South Fork Toutle River, west of Mount St. Helens. Note marks from muddy logs that hit bottom of girder. Cowlitz County, Washington. July 7, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0043 ID. Mount St. Helens - Schuster, R.L. 43 County road from which several feet of mud have recently been cleared; South Fork Toutle River near Toutle, west of Mount St. Helens. Cowlitz County, Washington. July 7, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0044 ID. Mount St. Helens - Schuster, R.L. 44 Reconstruction of Weyerhaeuser railroad bridge near Camp 12, northwest of Mount St. Helens. Cowlitz County, Washington. July 7, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0045 ID. Mount St. Helens - Schuster, R.L. 45 House damaged by mudflow, Toutle River near Tower Road bridge, northwest of Mount St. Helens. Note mud level on trees and on second floor balcony of house. Cowlitz County, Washington. July 7, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0046 ID. Mount St. Helens - Schuster, R.L. 46 North abutment of Tower Road bridge, Toutle River, northwest of Mount St. Helens. Note mud level on trees. Cowlitz County, Washington. July 7, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0047 ID. Mount St. Helens - Schuster, R.L. 47 1-5 bridge over Toutle River, northwest of Mount St. Helens. Note mud level on abutment in foreground. Cowlitz County, Washington. July 7, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0048 ID. Mount St. Helens - Schuster, R.L. 48 Building covered by mud to depth of about 4 feet, Toutle River Boys' Ranch, North Fork Toutle River, north of Mount St. Helens. Cowlitz County, Washington. July 7, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0049 ID. Mount St. Helens - Schuster, R.L. 49 Cabins destroyed by mudflow, Toutle River Boy's Ranch, North Fork Toutle River, north of Mount St. Helens. Cowlitz County, Washington. July 7, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0050 ID. Mount St. Helens - Schuster, R.L. 50 Badly damaged building, Toutle River Boys' Ranch, North Fork Toutle River, north of Mount St. Helens. Note mud line on front of building. Cowlitz County, Washington. July 7, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0051 ID. Mount St. Helens - Schuster, R.L. 51 Damaged buildings at Toutle River Boys' Ranch, North Fork Toutle River, North of Mount St. Helens. Cowlitz County, Washington. July 7, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0052 ID. Mount St. Helens - Schuster, R.L. 52 South abutment, Tower Road bridge, Toutle River, northwest of Mount St. Helens. Cowlitz County, Washington. July 7, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0053 ID. Mount St. Helens - Schuster, R.L. 53 Tower Road bridge, Toutle River, northwest of Mount St. Helens. Cowlitz County, Washington. July 7, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0054 ID. Mount St. Helens - Schuster, R.L. 54 South abutment, Tower Road bridge, Toutle River, northwest of Mount St. Helens. Cowlitz County, Washington. July 7, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0055 ID. Mount St. Helens - Schuster, R.L. 55 Dredge in Columbia River near Longview, west of Mount St. Helens. Washington. July 10, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0056 ID. Mount St. Helens - Schuster, R.L. 56 Dredge in Columbia River near Longview, west of Mount St. Helens. Washington. July 10, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0057 ID. Mount St. Helens - Schuster, R.L. 57 Dredges in Columbia River near Longview, west of Mount St. Helens. Washington. July 10, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0058 ID. Mount St. Helens - Schuster, R.L. 58 Dredges in Columbia River near Longview, west of Mount St. Helens. Washington. July 10, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0059 ID. Mount St. Helens - Schuster, R.L. 59 Center piers for Coalbanks bridge, SR 504, North Fork Toutle River, northwest of Mount St. Helens. Cowlitz County, Washington. July 10, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0060 ID. Mount St. Helens - Schuster, R.L. 60 Railroad cars derailed by mudflow, North Fork Toutle River, northwest of Mount St. Helens. Cowlitz County, Washington. July 10, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0061 ID. Mount St. Helens - Schuster, R.L. 61 Camp Baker, northwest of Mount St. Helens. Cowlitz County, Washington. July 10, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0062 ID. Mount St. Helens - Schuster, R.L. 62 Looking up the Mount St. Helens debris flow from above Camp Baker. Cowlitz County, Washington. July 10, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0063 ID. Mount St. Helens - Schuster, R.L. 63 Debris avalanche and debris flow below crater of Mount St. Helens. Skamania County, Washington. July 10, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0064 ID. Mount St. Helens - Schuster, R.L. 64 Railroad cars with logs trapped in mudflow at Camp Baker, northwest of Mount St. Helens. Cowlitz County, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0065 ID. Mount St. Helens - Schuster, R.L. 65 Railroad cars with logs trapped in mudflow at Camp Baker, northwest of Mount St. Helens. Cowlitz County, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0066 ID. Mount St. Helens - Schuster, R.L. 66 Railroad cars with logs, trapped in mudflow at Camp Baker, northwest of Mount St. Helens. Cowlitz County, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0067 ID. Mount St. Helens - Schuster, R.L. 67 Railroad cars with logs, trapped in mudflow at Camp Baker, northwest of Mount St. Helens. Cowlitz County, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0068 ID. Mount St. Helens - Schuster, R.L. 68 Railroad cars with logs, trapped in mudflow at Camp Baker, northwest of Mount St. Helens. Cowlitz County, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0069 ID. Mount St. Helens - Schuster, R.L. 69 Railroad cars with logs, trapped in mudflow at Camp Baker, northwest of Mount St. Helens. Cowlitz County, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0070 ID. Mount St. Helens - Schuster, R.L. 70 Railroad cars with logs, trapped in mudflow at Camp Baker, northwest of Mount St. Helens. Cowlitz County, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0071 ID. Mount St. Helens - Schuster, R.L. 71 Railroad cars with logs, trapped in mudflow at Camp Baker, northwest of Mount St. Helens. Cowlitz County, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0072 ID. Mount St. Helens - Schuster, R.L. 72 Vehicle wrapped around tree due to force of mudflow on North Fork Toutle River near Camp Baker, northwest of Mount St. Helens. Cowlitz County, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0073 ID. Mount St. Helens - Schuster, R.L. 73 Vehicle wrapped around tree due to force of mudflow on North Fork Toutle River near Camp Baker, northwest of Mount St. Helens. Cowlitz County, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0074 ID. Mount St. Helens - Schuster, R.L. 74 Debris flow below Spirit Lake, north of Mount St. Helens. Skamania County, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0075 ID. Mount St. Helens - Schuster, R.L. 75 Remnants of logging operation on Coldwater Ridge, north of Mount St. Helens. Skamania and Cowlitz Counties, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0076 ID. Mount St. Helens - Schuster, R.L. 76 Remnants of logging operation on Coldwater Ridge, north of Mount St. Helens. Skamania and Cowlitz Counties, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0077 ID. Mount St. Helens - Schuster, R.L. 77 Log-filled west arm of Spirit Lake, north of Mount St. Helens. Skamania County, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0078 ID. Mount St. Helens - Schuster, R.L. 78 New lake formed by damming of Coldwater Creek by Mount St. Helens debris flow. Skamania County, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0079 ID. Mount St. Helens - Schuster, R.L. 79 Devastated area on side of Coldwater Ridge, north of Mount St. Helens. Cowlitz and Skamania Counties, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0080 ID. Mount St. Helens - Schuster, R.L. 80 Pier and south abutment; 525-foot Coalbanks bridge on SR 504, North Fork Toutle River, northwest of Mount St. Helens. Cowlitz County, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0081 ID. Mount St. Helens - Schuster, R.L. 81 Pier and south abutment; 525-foot Coalbanks bridge on SR 504, North Fork Toutle River, northwest of Mount St. Helens. Cowlitz County, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0082 ID. Mount St. Helens - Schuster, R.L. 82 South abutment, 525-foot Coalbanks bridge on SR 504, North Fork Toutle River, northwest of Mount St. Helens. Cowlitz County, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrl0083 ID. Mount St. Helens - Schuster, R.L. 83 Piers of destroyed 525-foot Coalbanks bridge on SR 504, northwest of Mount St. Helens, looking from south to north. Cowlitz County, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc002 ID. Mount St. Helens Schuster, R.L. 2ct Logging truck on back side of Coldwater Ridge, north of Mount St. Helens. Skamania County, Washington. July 2, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc005 ID. Mount St. Helens Schuster, R.L. 5ct Norman Banks and Rick Hoblitt inspecting damaged D-8 tractor on Coldwater Ridge, north of Mount St. Helens. Skamania County, Washington. July 2, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc006 ID. Mount St. Helens Schuster, R.L. 6ct Norman Banks and Rick Hoblitt inspecting damaged D-8 tractor on Coldwater Ridge,north of Mount St. Helens. Skamania County, Washington. July 2, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc007 ID. Mount St. Helens Schuster, R.L. 7ct Damaged logging equipment on Coldwater Ridge, north of Mount St. Helens. Skamania County, Washington. July 2, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc008 ID. Mount St. Helens Schuster, R.L. 8ct Aerial view of damaged logging equipment on Coldwater Ridge, north of Mount St. Helens. Skamania County, Washington. July 2, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc009 ID. Mount St. Helens Schuster, R.L. 9ct Aerial view of Spirit Lake, north of Mount St. Helens. Skamania County, Washington. July 2, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc010 ID. Mount St. Helens Schuster, R.L. 10ct Aerial view of timber in Spirit Lake, north of Mount St. Helens. Skamania County, Washington. July 2, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc013 ID. Mount St. Helens Schuster, R.L. 13ct Looking up west arm of Spirit Lake. Mount St. Helens debris flow in side canyon. Coldwater Peak in left background. Skamania County, Washington. July 2, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc014 ID. Mount St. Helens Schuster, R.L. 14ct Coal Bank bridge, south abutment, SR 504, North Fork Toutle River, north of Mount St. Helens. Cowlitz County, Washington. July 2, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc015 ID. Mount St. Helens Schuster, R.L. 15ct Aerial view of St. Helens bridge submerged in mud along SR 504, North Fork Toutle River, north of Mount St. Helens. Cowlitz County, Washington. July 2, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc016 ID. Mount St. Helens Schuster, R.L. 16ct Aerial view of St. Helens bridge submerged in mud along SR 504, North Fork Toutle River, north of Mount St. Helens. Cowlitz County, Washington. July 2, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc018 ID. Mount St. Helens Schuster, R.L. 18ct Aerial view of logging cars submerged in mud at Camp Baker, northwest of Mount St. Helens. Cowlitz County, Washington. July 2, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc019 ID. Mount St. Helens Schuster, R.L. 19ct Aerial view of Camp Baker, northwest of Mount St. Helens. Cowlitz County, Washington. July 2, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc020 ID. Mount St. Helens Schuster, R.L. 20ct Aerial view of Weyerhaeuser bus at Camp Baker, northwest of Mount St. Helens. Cowlitz County, Washington. July 2, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc021 ID. Mount St. Helens Schuster, R.L. 21ct South end of Coal Bank bridge on SR 504, North Fork Toutle River, north of Mount St. Helens. Cowlitz County, Washington. July 5, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc022 ID. Mount St. Helens Schuster, R.L. 22ct South abutment, Coal Bank bridge on SR 504, North Fork Toutle River, north of Mount St. Helens. Cowlitz County, Washington. July 5, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc023 ID. Mount St. Helens Schuster, R.L. 23ct Coal Bank bridge on SR 504 on North Fork Toutle River, north of Mount St. Helens. Cowlitz County, Washington. July 5, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc025 ID. Mount St. Helens Schuster, R.L. 25ct North Fork Toutle River, north of Mount St. Helens, along SR 504. Coal Bank bridge in background. Mudflow marking on tree in foreground. Cowlitz County, Washington. July 5, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc026 ID. Mount St. Helens Schuster, R.L. 26ct Toutle water supply plant building, South Fork Toutle River after Mount St. Helens eruptions. Building has been dug out of mud which was originally about 6 feet deep. Cowlitz County, Washington. July 5, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc027 ID. Mount St. Helens Schuster, R.L. 27ct Cowlitz County bridge on South Fork Toutle River. This bridge barely survived the mudflow of May 18 eruption of Mount St. Helens.D.R. Crandell for scale. Cowlitz County, Washington. July 5, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc028 ID. Mount St. Helens Schuster, R.L. 28ct Cowlitz County road along South Fork Toutle River after removal of mudflow material from Mount St. Helens. Cowlitz County, Washington. July 5, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc031 ID. Mount St. Helens Schuster, R.L. 31ct Damaged logging cars at Weyerhaeuser Camp 12 after Mount St. Helens eruptions. Cowlitz County, Washington. July 5, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc033 ID. Mount St. Helens Schuster, R.L. 33ct North pier of Tower Road bridge, northwest of Mount St. Helens, on North Fork Toutle River. Cowlitz County, Washington. July 5, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc035 ID. Mount St. Helens Schuster, R.L. 35ct Tower Road bridge, northwest of Mount St. Helens, on North Fork Toutle River. Note high level of mudflow on trees. Cowlitz County, Washington. July 5, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc036 ID. Mount St. Helens Schuster, R.L. 36ct I-5 bridge over Toutle River, northwest of Mount St. Helens. Note mud line on left abutment and paint removed from main girder by logs. Cowlitz County, Washington. July 5, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc037 ID. Mount St. Helens Schuster, R.L. 37ct Mudflow covering SR 504 about 2 miles upstream from Coal Bank bridge, North Fork Toutle River, north of Mount St. Helens. Gordon Coyier in middle foreground. Cowlitz County, Washington. July 5, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc041 ID. Mount St. Helens Schuster, R.L. 41ct Aerial view of dredges in Columbia River at Longview, southwest of Mount St. Helens. Cowlitz County, Washington. July 10, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc043 ID. Mount St. Helens Schuster, R.L. 43ct Aerial view of railroad cars along North Fork Toutle River, north of Mount St. Helens. They were knocked off track by mudflow which was subsequently cleaned from track. Cowlitz County, Washington. July 10, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc044 ID. Mount St. Helens Schuster, R.L. 44ct Aerial view of railroad cars along North Fork Toutle River, north of Mount St. Helens. They were knocked off track by mudflow which was subsequently cleaned from track. Cowlitz County, Washington. July 10, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc045 ID. Mount St. Helens Schuster, R.L. 45ct Aerial view of Weyerhaeuser bridge, northwest of Mount St. Helens, at Kid Valley on North Fork Toutle River. Cowlitz County, Washington. July 10, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc046 ID. Mount St. Helens Schuster, R.L. 46ct Aerial-view of Camp Baker, northwest of Mount St. Helens. Cowlitz County, Washington. July 10, #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc047 ID. Mount St. Helens Schuster, R.L. 47ct Aerial view of lahar, looking toward Mount St. Helens. Skamania County, Washington. July 10, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc048 ID. Mount St. Helens Schuster, R.L. 48ct Aerial view of lahar below Spirit Lake, north of Mount St. Helens. Skamania County, Washington. July 10, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc049 ID. Mount St. Helens Schuster, R.L. 49ct Aerial view of lahar below Spirit Lake, north of Mount St. Helens. Skamania County, Washington. July 10, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc050 ID. Mount St. Helens Schuster, R.L. 50ct Aerial view of lahar below Spirit Lake, north of Mount St. Helens. Skamania County, Washington. July 10, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc051 ID. Mount St. Helens Schuster, R.L. 51ct Aerial view of Spirit Lake, north of Mount St. Helens. Skamania County, Washington. July 10, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc052 ID. Mount St. Helens Schuster, R.L. 52ct Aerial view of Spirit Lake, north of Mount St. Helens. Skamania County, Washington. July 10, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc053 ID. Mount St. Helens Schuster, R.L. 53ct Aerial view of Spirit Lake. Mount St. Helens in background hidden by clouds. Skamania County, Washington. July 10, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc056 ID. Mount St. Helens Schuster, R.L. 56ct Mount St. Helens mudflow on South Fork Toutle River. Skamania and Cowlitz Counties, Washington. July 10, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc060 ID. Mount St. Helens Schuster, R.L. 60ct Weyerhaeuser bridge, northwest of Mount St. Helens. at Kid Valley on North Fork Toutle River. Cowlitz County, Washington. July 10, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc061 ID. Mount St. Helens Schuster, R.L. 61ct St. Helens bridge in mudflow deposit along SR 504 on North Fork Toutle River, north of Mount St. Helens. Cowlitz County, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc063 ID. Mount St. Helens Schuster, R.L. 63ct St. Helens bridge in mudflow deposit along SR 504 on North Fork Toutle River, north of Mount St. Helens. Cowlitz County, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc064 ID. Mount St. Helens Schuster, R.L. 64ct Kid Valley bridge on SR 504, North Fork Toutle River, north of Mount St. Helens. Cowlitz County, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc065 ID. Mount St. Helens Schuster, R.L. 65ct Damaged-logging truck near Camp Baker, northwest of Mount St. Helens. Cowlitz County, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc066 ID. Mount St. Helens Schuster, R.L. 66ct Damaged railroad tracks at Camp Baker, northwest of Mount St. Helens. Cowlitz County, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc067 ID. Mount St. Helens Schuster, R.L. 67ct Damaged building at Camp Baker, northwest of Mount St. Helens. Cowlitz County, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc068 ID. Mount St. Helens Schuster, R.L. 68ct Road cleared through mud at Camp Baker, northwest of Mount St. Helens. Cowlitz County, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc069 ID. Mount St. Helens Schuster, R.L. 69ct Damaged building at Camp Baker, northwest of Mount St. Helens. Cowlitz County, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc072 ID. Mount St. Helens Schuster, R.L. 72ct Logging cars and logs tipped over and partially buried by Mount St. Helens May 18 mudflow. Cowlitz County, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc073 ID. Mount St. Helens Schuster, R.L. 73ct Mudflow on Toutle River above Camp Baker, northwest of Mount St. Helens. Cowlitz County, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc074 ID. Mount St. Helens Schuster, R.L. 74ct Mudflow on Toutle River above Camp Baker northwest of Mount St. Helens. Cowlitz County, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc075 ID. Mount St. Helens Schuster, R.L. 75ct Trees at distal margin of Mount St. Helens debris flow.D.R. Crandell for scale. Cowlitz County, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc076 ID. Mount St. Helens Schuster, R.L. 76ct Weyerhaeuser bridge at Kid Valley on North Fork Toutle River, north of Mount St. Helens. Cowlitz County, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc077 ID. Mount St. Helens Schuster, R.L. 77ct Bridge on SR 504 near Camp Baker, northwest of Mount St. Helens. Cowlitz County, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc078 ID. Mount St. Helens Schuster, R.L. 78ct Damaged Weyerhaeuser bus at Camp Baker, northwest of Mount St. Helens. Cowlitz County, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc079 ID. Mount St. Helens Schuster, R.L. 79ct Alder Creek bridge on SR 504, north of Mount St. Helens. Cowlitz County, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc081 ID. Mount St. Helens Schuster, R.L. 81ct Close view of Weyerhaeuser bus submerged in mud at Camp Baker, northwest of Mount St. Helens. Cowlitz County, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc082 ID. Mount St. Helens Schuster, R.L. 82ct Weyerhaeuser bridge, northwest of Mount St. Helens, at Kid Valley on North Fork Toutle River. Cowlitz County, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc084 ID. Mount St. Helens Schuster, R.L. 84ct Aerial view of lahar in upper North Fork Toutle River Valley, north of Mount St. Helens. Cowlitz County, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc085 ID. Mount St. Helens Schuster, R.L. 85ct Mount St. Helens debris flow near its distal margin. Cowlitz County, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc087 ID. Mount St. Helens Schuster, R.L. 87ct Mount St. Helens debris flow about 1 mile east of distal margin. Cowlitz County, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc088 ID. Mount St. Helens Schuster, R.L. 88ct Mount St. Helens debris flow about 1 mile east of distal margin. Cowlitz County, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc089 ID. Mount St. Helens Schuster, R.L. 89ct Timber destroyed by May 18 eruption of Mount St. Helens and debris flow. Skamania County, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc090 ID. Mount St. Helens Schuster, R.L. 90ct Outer edge of Mount St. Helens blast zone along North Fork Toutle River. Skamania County, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc094 ID. Mount St. Helens Schuster, R.L. 94ct Station wagon trapped on SR 504 about 2 miles east of Camp Baker, northwest of Mount St. Helens. Cowlitz County, Washington. July 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc095 ID. Mount St. Helens Schuster, R.L. 95ct SR 504 about 2 miles east of Camp Baker, northwest of Mount St. Helens. Trees knocked down by blast were bucked on July 11, 1980. Cowlitz County, Washington. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc097 ID. Mount St. Helens Schuster, R.L. 97ct Front end loader removing mud from SR 504 about 2 miles upstream from Coal Bank bridge, north of Mount St. Helens. Cowlitz County, Washington. July 15, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc100 ID. Mount St. Helens Schuster, R.L. 100ct House on Tower Road destroyed by Mount St. Helens May 18 mudflow, North Fork Toutle River. Cowlitz County, Washington. July 15, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc101 ID. Mount St. Helens Schuster, R.L. 101ct House and car on Tower Road destroyed by Mount St. Helens May 18 mudflow. Cowlitz County, Washington. July 15, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc102 ID. Mount St. Helens Schuster, R.L. 102ct House on Tower Road damaged by Mount St. Helens May 18 mudflow. Cowlitz County, Washington. July 15, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc103 ID. Mount St. Helens Schuster, R.L. 103ct House on Tower Road damaged by Mount St. Helens May 18 mudflow. Cowlitz County, Washington. July 15, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc104 ID. Mount St. Helens Schuster, R.L. 104ct Looking east (up-valley) on Mount St. Helens debris flow near its distal margin. Cowlitz and Skamania Counties, Washington. July 17, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc105 ID. Mount St. Helens Schuster, R.L. 105ct Looking west (down-valley) on Mount St. Helens debris flow near its distal margin. Cowlitz County, Washington. July 17, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc106 ID. Mount St. Helens Schuster, R.L. 106ct D.R. Mullineaux in small "kettle" caused by melting of block ice in lower end of Mount St. Helens debris flow. Cowlitz County, Washington. July 17, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc107 ID. Mount St. Helens Schuster, R.L. 107ct Looking east up Mount St. Helens debris flow from near its distal margin. Cowlitz County, Washington. July 15, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc108 ID. Mount St. Helens Schuster, R.L. 108ct Looking east up Mount St. Helens debris flow from near its distal margin. Cowlitz County, Washington. July 15, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc110 ID. Mount St. Helens Schuster, R.L. 110ct Near distal margin of Mount St. Helens debris flow about 3 miles east of Camp Baker.D.R. Mullineaux for scale. Cowlitz County, Washington. July 15, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc111 ID. Mount St. Helens Schuster, R.L. 111ct Stream eroding through Mount St. Helens debris flow near distal margin. Cowlitz County, Washington. July 15, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc112 ID. Mount St. Helens Schuster, R.L. 112ct "Kettle" in Mount St. Helens debris flow about 2 miles east of distal margin. Formed by melting of buried ice block carried down by debris flow. D.R. Mullineaux for scale. Cowlitz County, Washington. July 15, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198007/msrlc113 ID. Mount St. Helens Schuster, R.L. 113ct Looking east along SR 504 about 2 miles east of Camp Baker, northwest of Mount St. Helens.D.R. Mullineaux for scale. Cowlitz County, Washington. July 15, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198009/msrlc118 ID. Mount St. Helens Schuster, R.L. 118ct Dome in crater of Mount St. Helens Skamania County, Washington. September , 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198009/msrlc121 ID. Mount St. Helens Schuster, R.L. 121ct Upper end of Mount St. Helens debris avalanche. Skamania County, Washington. September 10, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198009/msrlc122 ID. Mount St. Helens Schuster, R.L. 122ct Pyroclastic flow and debris avalanche on slopes of Mount St. Helens. Skamania County, Washington. September 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198009/msrlc123 ID. Mount St. Helens Schuster, R.L. 123ct Remnant of Mount St. Helens debris avalanche at north end of west arm of Spirit Lake. Skamania County, Washington. September 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198009/msrlc126 ID. Mount St. Helens Schuster, R.L. 126ct Looking northwest across Spirit Lake at Coldwater Peak, north of Mount St. Helens. Skamania County, Washington. September 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198009/msrlc127 ID. Mount St. Helens Schuster, R.L. 127ct Mount St. Helens from rock debris island in Spirit Lake. Skamania County, Washington. September 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198009/msrlc128 ID. Mount St. Helens Schuster, R.L. 128ct Mount St. Helens from rock debris island in Spirit Lake. Skamania County, Washington. September 11, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198009/msrlc129 ID. Mount St. Helens Schuster, R.L. 129ct Looking upstream from near terminus of Mount St. Helens debris flow, North Fork Toutle River. Skamania County, Washington. September 20, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198009/msrlc131 ID. Mount St. Helens Schuster, R.L. 131ct Lake formed by damming of Jackson Creek by Mount St. Helens debris flow in valley of North Fork Toutle River. Skamania County, Washington. September 20, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198009/msrlc132 ID. Mount St. Helens Schuster, R.L. 132ct 30 foot hummock on Mount St. Helens debris avalanche near Coldwater Creek. Skamania County, Washington. September 20, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198009/msrlc135 ID. Mount St. Helens Schuster, R.L. 135ct Looking across lower part of Mount St. Helens debris flow in valley of North Fork Toutle River Skamania County, Washington. September 21, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198009/msrlc136 ID. Mount St. Helens Schuster, R.L. 136ct Looking east up the Mount St. Helens debris flow toward Coldwater Peak. Skamania County, Washington. September 21, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198009/msrlc138 ID. Mount St. Helens Schuster, R.L. 138ct Looking west down Mount St. Helens lower debris flow. Skamania County, Washington. September 21, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198009/msrlc139 ID. Mount St. Helens Schuster, R.L. 139ct Dredging the lower Toutle River, northwest of Mount St. Helens. Note I-5 bridge in background. Cowlitz County, Washington. September 21, 1980. #1:/Schuster R.L. Collection-Mount St. Helens*msh198009/msrlc140 ID. Mount St. Helens Schuster, R.L. 140ct Bailey bridge used as temporary span over Toutle River near town of Toutle, northwest of Mount St. Helens. Cowlitz County, Washington. September 21, 1980. #1:/McLaughlin T.G. Collection-McLaughlin Collection/mtg00007 ID. McLaughlin, T.G. 7 Well developed dendritic drainage pattern on the soft rocks of the Ogallala formation near the edge of its outcrop where stream gradients are steep. Baca County, Colorado.n.d. #1:/Klondike Gold Rush National Historic Park/mwc00001 ID. Mendenhall, W.C. 1 Klondike Gold Rush National Historic Park, Alaska. Dyea, viewed from the road leading to the wharf. 1898. #1:/Mendenhall Collection/mwc00002 ID. Mendenhall, W.C. 2 View to the north side of Portage Bay, showing bend along Portage Bay. Wells District, Alaska Gulf Region. Alaska. 1898. #1:/Mendenhall Collection/mwc00003 ID. Mendenhall, W.C. 3 East Glacier at the head of Port Wells. Wells District, Alaska Gulf Region. Alaska. 1898. #1:/Mendenhall Collection/mwc00004 ID. Mendenhall, W.C. 4 U.S. Army Party at Spruce Camp, head of Turnagain Arm. Hope District, Cook Inlet Region. Alaska. 1898. #1:/Mendenhall Collection/mwc00005 ID. Mendenhall, W.C. 5 Prospecting party at Spruce Camp, Head of Turnagain. Hope District, Cook Inlet Region. Alaska. 1898. #1:/Mendenhall Collection/mwc00006 ID. Mendenhall, W.C. 6 View of Portage Bay from the summit of the Glacier. Wells District, Prince William Sound. Alaska. 1898. #1:/Mendenhall Collection/mwc00007 ID. Mendenhall, W.C. 7 Portage Bay Camp. Wells District, Alaska Gulf Region. May Alaska. 1898. #1:/Mendenhall Collection/mwc00008 ID. Mendenhall, W.C. 8 Wash day in camp. Wells District, Alaska Gulf Region. Alaska. 1898. #1:/Mendenhall Collection/mwc00009 ID. Mendenhall, W.C. 9 Yellowstone Keily in Portage Bay Camp. Wells District, Alaska Gulf Region. Alaska. 1898. #1:/Mendenhall Collection/mwc00010 ID. Mendenhall, W.C. 10 Captain Glenn and Capt. Kulp, Portage Bay. Wells District, Alaska Gulf Region. Alaska. 1898. #1:/Mendenhall Collection/mwc00011 ID. Mendenhall, W.C. 11 Aleut women and children on Schooner Olga. Prince Wound Sound, Alaska Gulf Region. Alaska. 1898. #1:/Mendenhall Collection/mwc00012 ID. Mendenhall, W.C. 12 The crew of the Schooner Olga with Aleut women and children. Prince Wound Sound, Alaska Gulf Region. Alaska. 1898. #1:/Mendenhall Collection/mwc00013 ID. Mendenhall, W.C. 13 Portage Bay camp from the Beach. Wells District, Alaska Gulf Region. Alaska. 1898. #1:/Mendenhall Collection/mwc00014 ID. Mendenhall, W.C. 14 Indians and Indian houses at Tynok [Tyonek]. Spurr District, Cook Inlet Region. Alaska. 1898. #1:/Mendenhall Collection/mwc00015 ID. Mendenhall, W.C. 15 General view of Tyunok [Tyonek] from the bluff, tents of prospectors along the beach. Spurr District, Cook Inlet Region. Alaska. 1898. #1:/Mendenhall Collection/mwc00016 ID. Mendenhall, W.C. 16 Mouth of Six Mile Creek and Sunrise City from Turnagain Arm. Hope District, Cook Inlet Region. Alaska. 1898. #1:/Mendenhall Collection/mwc00017 ID. Mendenhall, W.C. 17 Ladds Station. Spurr District, Cook Inlet Region. Alaska. 1898. #1:/Mendenhall Collection/mwc00018 ID. Mendenhall, W.C. 18 Tidal fish trap, Ladds Station. Spurr District, Cook Inlet Region. Alaska. 1898. #1:/Mendenhall Collection/mwc00019 ID. Mendenhall, W.C. 19 Finger Lake lower Matanuska Valley. Looking towards the mouth of Knik River. Matanuska District, Cook Inlet Region. Alaska. 1898. #1:/Mendenhall Collection/mwc00020 ID. Mendenhall, W.C. 20 Fault opposite the mouth of Granite Creek, Matanuska Valley. Matanuska District, Cook Inlet Region. Alaska. 1898. #1:/Mendenhall Collection/mwc00021 ID. Mendenhall, W.C. 21 Castle Mountain, Matanuska Valley. Matanuska District, Cook Inlet Region. Alaska. 1898. #1:/Mendenhall Collection/mwc00022 ID. Mendenhall, W.C. 22 View up the Valley of Hicks Creek. A tributary of Matanuska River. Matanuska District, Cook Inlet Region. Alaska. 1898. #1:/Mendenhall Collection/mwc00023 ID. Mendenhall, W.C. 23 Camp in gorge of a tributary of Hicks Creek. Matanuska Valley. Matanuska District, Cook Inlet Region. Alaska. 1898. #1:/Mendenhall Collection/mwc00024 ID. Mendenhall, W.C. 24 Lake Louise, Copper River. Klutina District, Cook Inlet Region. Alaska. 1898. #1:/Mendenhall Collection/mwc00025 ID. Mendenhall, W.C. 25 Fording Gakona River, Copper River Basin. Klutina District, Cook Inlet Region. Alaska. 1898. #1:/Mendenhall Collection/mwc00026 ID. Mendenhall, W.C. 26 Gap of Delta River in the Alaskan Mountains, looking across Lake Tangle. Gulkins District, Cooper River Region. Alaska. 1898. #1:/Mendenhall Collection/mwc00027 ID. Mendenhall, W.C. 27 Hunting camp of Upper Copper River Indians, head of delta. Gulkins District, Cooper River Region. Alaska. 1898. #1:/Mendenhall Collection/mwc00028 ID. Mendenhall, W.C. 28 View towards Mt. Hayes and adjacent peaks from the Tanana Valley along the lower delta. Donnelly District, Cooper River Region. Alaska. 1898. #1:/Mendenhall Collection/mwc00029 ID. Mendenhall, W.C. 29 Lieut. Castner [center] and party [Pvt. Bletch, left and Pvt. McGregor, right] bound for the Volkmar River, along the lower delta. Donnelly District, Cooper River Region. Alaska. 1898. #1:/Mendenhall Collection/mwc00030 ID. Mendenhall, W.C. 30 View across the upper course of Delta River showing Terr Acres in the Gravels. Donnelly District, Yukon Region. Alaska. 1898. #1:/Mendenhall Collection/mwc00031 ID. Mendenhall, W.C. 31 View into the gap of Delta River from the morainal ridge south of Lake Tangle. Donnelly District, Copper River Region. Alaska. 1898. #1:/Mendenhall Collection/mwc00032 ID. Mendenhall, W.C. 32 Landmark Gap at head of Delta River across Lake Tangel. Gulkana District, Copper Region. Alaska. 1898. #1:/Alaska-Professional paper 45/mwc00033 ID. Mendenhall, W.C. 33 Northern margin of Copper River plateau, with pack train, and men. Plate 14-B in U.S. Geological Survey. Professional paper 45. 1906. Gulkana District, Copper Region. Alaska. 1898. #1:/Mendenhall Collection/mwc00034 ID. Mendenhall, W.C. 34 Glacially rounded foothills north of the Copper River Plateau. Klutina District, Copper Region. Alaska. 1898. #1:/Mendenhall Collection/mwc00035 ID. Mendenhall, W.C. 35 Typical view of the Copper River Plateau. Klutina District, Copper Region. Alaska. 1898. #1:/Mendenhall Collection/mwc00036 ID. Mendenhall, W.C. 36 View towards Lake Pleveznie from near the source of Tazline River. Klutina District, Copper Region. Alaska. 1898. #1:/Mendenhall Collection/mwc00037 ID. Mendenhall, W.C. 37 Looking towards Tazlina Glacier from the bend just north of Tahetna Pass. Matanuska District, Cook Inlet Region, Alaska. 1898. #1:/Alasks-Professional paper 45/mwc00038 ID. Mendenhall, W.C. 38 View up Matanuska valley from Glacier Point, showing recent gorge in older valley. Plate 15-A in U.S. Geological Survey. Professional paper 45. 1906. Matanuska District, Cook Inlet Region, Alaska. 1898. #1:/Mendenhall Collection/mwc00039 ID. Mendenhall, W.C. 39 Looking down the Matanuska River from Glacier Point. Matanuska District, Cook Inlet Region, Alaska. 1898. #1:/Mendenhall Collection/mwc00040 ID. Mendenhall, W.C. 40 Matanuska Glacier from Glacier Point. Matanuska District, Cook Inlet Region, Alaska. 1898. #1:/Mendenhall Collection/mwc00041 ID. Mendenhall, W.C. 41 Trap ridges in Matanuska Valley just above Schoonover Creek. Matanuska District, Cook Inlet Region, Alaska. 1898. #1:/Mendenhall Collection/mwc00042 ID. Mendenhall, W.C. 42 Recent Gorge of Schoonover Creek cut in the floor of the lower Matanuska Valley. Matanuska District, Cook Inlet Region, Alaska. 1898. #1:/Mendenhall Collection/mwc00043 ID. Mendenhall, W.C. 43 Matanuska River from below Tsaduke Creek. A type of over loaded stream. Klutina District, Copper Region. Alaska. 1898. #1:/Mendenhall Collection/mwc00044 ID. Mendenhall, W.C. 44 Matanuska River from below Tsaduke Creek. A type of over loaded stream. Prince William Sound. Alaska. 1898. #1:/Mendenhall Collection/mwc00045 ID. Mendenhall, W.C. 45 Looking back into Landlocked Bay from the stern of the Steamer Dora. Prince William Sound. Alaska, 1898. #1:/Mendenhall Collection/mwc00046 ID. Mendenhall, W.C. 46 Outcrop of Tertiary Lignite on the beach below Tyonok. Matanuska District, Cook Inlet Region, Alaska. 1898. #1:/Alasks-Professional paper 45/mwc00047 ID. Mendenhall, W.C. 47 Hunter Bay, Prince of Wales Island, illustrating deep water conditions close to land, steamer Dora at wharf, Alaska. 1898, plate 4-B in U.S. Geological Survey. Professional paper 45. 1906. #1:/Mendenhall Collection/mwc00048 ID. Mendenhall, W.C. 48 Swauk Prairie. Kittitas County, Washington. ca 1900. #1:/Mendenhall Collection/mwc00049 ID. Mendenhall, W.C. 49 Teanaway basalt, Middle Fork Teanaway River. Kittitas County, Washington. #1:/Mendenhall Collection/mwc00050 ID. Mendenhall, W.C. 50 Looking towards Mt. Stuart from the lower north fork of Teanaway River. Kittitas County, Washington. ca 1900. #1:/Mendenhall Collection/mwc00051 ID. Mendenhall, W.C. 51 Gorge at the mouth of Swauk Creek. Kittitas County, Washington. ca 1900. #1:/Mendenhall Collection/mwc00052 ID. Mendenhall, W.C. 52 Gravel cut above Cle Elum. Kittitas County, Washington. ca 1900. #1:/Mendenhall Collection/mwc00053 ID. Mendenhall, W.C. 53 Cle Elum point from the east. ca 1900. Kittitas County, Washington. #1:/Mendenhall Collection/mwc00054 ID. Mendenhall, W.C. 54 Cle Elum point from the northeast. Kittitas County, Washington. ca 1900. #1:/Mendenhall Collection/mwc00055 ID. Mendenhall, W.C. 55 Rapids in upper Snoqualmie. King County, Washington. ca 1900. #1:/Mendenhall Collection/mwc00056 ID. Mendenhall, W.C. 56 Franklin Falls, Snoqualmie River. King County, Washington. ca 1900. #1:/Mendenhall Collection/mwc00057 ID. Mendenhall, W.C. 57 Guy and Slate Peaks from Snoqualmie Pass. King County, Washington. ca 1900. #1:/Mendenhall Collection/mwc00058 ID. Mendenhall, W.C. 58 Slate Peak across Snoqualmie Pond. King County, Washington. ca 1900. #1:/Mendenhall Collection/mwc00059 ID. Mendenhall, W.C. 59 Along Lake Keechelus. Kittitas County, Washington. ca 1900. #1:/Mendenhall Collection/mwc00060 ID. Mendenhall, W.C. 60 Snoqualmie Pass Road along Lake Keechelus. Kittitas County, Washington. ca 1900. #1:/Mendenhall Collection/mwc00061 ID. Mendenhall, W.C. 61 Silver Peak across the head of Lake Keechelus. Kittitas County, Washington. ca 1900. #1:/Mendenhall Collection/mwc00062 ID. Mendenhall, W.C. 62 Pack train by Lake Keechelus. Kittitas County, Washington. ca 1900. #1:/Mendenhall Collection/mwc00063 ID. Mendenhall, W.C. 63 Across south end of Cle Elum Lake. Kittitas County, Washington. ca 1900. #1:/Mendenhall Collection/mwc00064 ID. Mendenhall, W.C. 64 Beach, Cle Elum Lake. Kittitas County, Washington. ca 1900. #1:/Mendenhall Collection/mwc00065 ID. Mendenhall, W.C. 65 Across the upper end of Klealum Lake. Kittitas County, Washington. ca 1900. #1:/Mendenhall Collection/mwc00066 ID. Mendenhall, W.C. 66 Basalt Dike in Swauk Sandstone at the head of Paris Creek. Kittitas County, Washington. ca 1900. #1:/Mendenhall Collection/mwc00067 ID. Mendenhall, W.C. 67 Hawkins Peak and Goat Mountain. Kittitas County, Washington. ca 1900. #1:/Mendenhall Collection/mwc00068 ID. Mendenhall, W.C. 68 Huckleberry Group from the west slope of Goat Mountain. King and Kittitas Counties, Washington. ca 1900. #1:/Mendenhall Collection/mwc00069 ID. Mendenhall, W.C. 69 Klealum River Valley from the slope of Goat Mountain. King and Kittitas Counties, Washington. ca 1900. #1:/Mendenhall Collection/mwc00070 ID. Mendenhall, W.C. 70 Grahams Prospect showing fault between Serpentine and Tuff. Washington. ca 1900. #1:/Mendenhall Collection/mwc00071 ID. Mendenhall, W.C. 71 Mt. Dewey and Hyas Lake from Goat Mountain. Kittitas County, Washington. ca 1900. #1:/Mendenhall Collection/mwc00072 ID. Mendenhall, W.C. 72 Looking across upper Hyas Lake. Kittitas County, Washington. ca 1900. #1:/Mendenhall Collection/mwc00073 ID. Mendenhall, W.C. 73 Cathedral Point from amphitheatre west of it. Kittitas County, Washington. ca 1900. #1:/Mendenhall Collection/mwc00074 ID. Mendenhall, W.C. 74 View northwest from basin at the foot of Cathedral Point. Kittitas County, Washington. ca 1900. #1:/Mendenhall Collection/mwc00075 ID. Mendenhall, W.C. 75 View west across the head of Little Salmon Lasac River. Kittitas County, Washington. ca 1900. #1:/Mendenhall Collection/mwc00076 ID. Mendenhall, W.C. 76 Wapitas needle across Wapitas Lake. Kittitas County, Washington. ca 1900. #1:/Mendenhall Collection/mwc00077 ID. Mendenhall, W.C. 77 Mt. Dewey from point north of Wapitas Lake. Kittitas County, Washington. ca 1900. #1:/Mendenhall Collection/mwc00078 ID. Mendenhall, W.C. 78 The Dutch Miller Country from the pass to Wapitas Lake. Kittitas County, Washington. ca 1900. #1:/Mendenhall Collection/mwc00079 ID. Mendenhall, W.C. 79 Wapitas Needle from the Dutch Miller Prospect. Kittitas County, Washington. ca 1900. #1:/Mendenhall Collection/mwc00080 ID. Mendenhall, W.C. 80 Huckleberry Group from point north of Wapitas Lake. Kittitas County, Washington. ca 1900. #1:/Mendenhall Collection/mwc00081 ID. Mendenhall, W.C. 81 Unalaska Harbor, from island 1580 A.T. Bering Sea, Aleutian Islands, Alaska. ca. 1900. #1:/Mendenhall Collection/mwc00082 ID. Mendenhall, W.C. 82 Coaling in Dutch Harbor, Revenue Cutters and U.S.A. transport Rosecrans. Bering Sea, Aleutian Islands, Alaska. ca. 1900. #1:/Mendenhall Collection/mwc00083 ID. Mendenhall, W.C. 83 A sea arch, 1 1/2 miles west of Duch Harbor. Aleutian Region, Alaska. 1900. #1:/Mendenhall Collection/mwc00084 ID. Mendenhall, W.C. 84 A sand spit and Lake Unalaska. Aleutian Region, Alaska. 1900. #1:/Mendenhall Collection/mwc00085 ID. Mendenhall, W.C. 85 Main Street. Nome. Nome quadrangle. Seward Penn, Alaska. ca. 1900. #1:/Mendenhall Collection/mwc00086 ID. Mendenhall, W.C. 86 Wharf and fleet off shore, Nome. Nome quadrangle. Seward Penn. Alaska. ca. 1900. #1:/Mendenhall Collection/mwc00087 ID. Mendenhall, W.C. 87 Shipping in Bay, mount of Snake River, Nome. Nome quadrangle. Seward Penn. Alaska. ca. 1900. #1:/Mendenhall Collection/mwc00088 ID. Mendenhall, W.C. 88 Town of Nome. Nome quadrangle. Seward Penn. Alaska. ca. 1900. #1:/Mendenhall Collection/mwc00089 ID. Mendenhall, W.C. 89 Shipping and Mouth of Snake River, Nome. Nome quadrangle. Seward Penn. Alaska. ca. 1900. #1:/Mendenhall Collection/mwc00090 ID. Mendenhall, W.C. 90 Eskimo Village Ignituk, Golofin Bay. Nome quadrangle. Council District, Seward Penn. Alaska. ca. 1900. #1:/Mendenhall Collection/mwc00091 ID. Mendenhall, W.C. 91 Chinik Village [Golovin] from bluff, Golif in Bay. Nome quadrangle. Council District, Seward Penn. Alaska. ca. 1900. #1:/Mendenhall Collection/mwc00092 ID. Mendenhall, W.C. 92 Eskimo Houses, Chinik Village [Golovin], Golif in Bay. Nome quadrangle. Council District, Seward Penn. Alaska. ca. 1900. #1:/Mendenhall Collection/mwc00093 ID. Mendenhall, W.C. 93 Eskimo Sod House, Chinik Village [Golovin], Golif in Bay. Nome quadrangle. Council District, Seward Penn. Alaska. ca. 1900. #1:/Mendenhall Collection/mwc00094 ID. Mendenhall, W.C. 94 Fish River from mouth of Niukluk River. Nome quadrangle. Council District, Seward Penn. Alaska. ca. 1900. #1:/Mendenhall Collection/mwc00095 ID. Mendenhall, W.C. 95 Junction of Fish and Niukluk Rivers. Fish River from mouth of Nukluk River. Nome quadrangle. Council District, Seward Penn. Alaska. ca. 1900. #1:/Mendenhall Collection/mwc00096 ID. Mendenhall, W.C. 96 Geological Survey camp, Fish River. Nome quadrangle. Council District, Seward Penn. Alaska. ca. 1900. #1:/Mendenhall Collection/mwc00097 ID. Mendenhall, W.C. 97 View of Fish River Basin. Nome quadrangle. Council District, Seward Penn. Alaska. ca. 1900. #1:/Mendenhall Collection/mwc00098 ID. Mendenhall, W.C. 98 A view of Fish River Basin. Nome quadrangle. Koyuk District, Seward Penn. Alaska. ca. 1900. #1:/Mendenhall Collection/mwc00099 ID. Mendenhall, W.C. 99 Omilak Silver Mines. Nome quadrangle. Koyuk District, Seward Penn. Alaska. ca. 1900. #1:/Mendenhall Collection/mwc00100 ID. Mendenhall, W.C. 100 Buildings at Silver Mines, Omilak. Nome quadrangle. Koyuk District, Seward Penn. Alaska. ca. 1900. #1:/Mendenhall Collection/mwc00101 ID. Mendenhall, W.C. 101 Upper course of Fish River and Gap. Nome quadrangle. Koyuk District, Seward Penn. Alaska. ca. 1900. #1:/Mendenhall Collection/mwc00102 ID. Mendenhall, W.C. 102 Fish River Basin. Nome quadrangle. Koyuk District, Seward Penn. Alaska. ca. 1900. #1:/Mendenhall Collection/mwc00103 ID. Mendenhall, W.C. 103 Head of Fish River Valley. Nome quadrangle. Koyuk District, Seward Penn. Alaska. ca. 1900. #1:/Mendenhall Collection/mwc00104 ID. Mendenhall, W.C. 104 Eskimo caches, south edge Fish River Basin. Nome quadrangle. Koyuk District, Seward Penn. Alaska. ca. 1900. #1:/Mendenhall Collection/mwc00105 ID. Mendenhall, W.C. 105 Fish River Gorge. Nome quadrangle. Koyuk District, Seward Penn. Alaska. ca. 1900. #1:/Mendenhall Collection/mwc00106 ID. Mendenhall, W.C. 106 Fish River. Nome quadrangle. Koyuk District, Seward Penn. Alaska. ca. 1900. #1:/Mendenhall Collection/mwc00107 ID. Mendenhall, W.C. 107 Fish drying racks, Eskimo Fishing Village. Nome quadrangle. Koyuk District, Seward Penn. Alaska. ca. 1900. #1:/Mendenhall Collection/mwc00108 ID. Mendenhall, W.C. 108 Delta of Fish River, from slope of White Mountian. Nome quadrangle. Council District, Seward Penn. Alaska. ca. 1900. #1:/Mendenhall Collection/mwc00109 ID. Mendenhall, W.C. 109 Fish River and White Mountain City. Nome quadrangle. Council District, Seward Penn. Alaska. ca. 1900. #1:/Mendenhall Collection/mwc00110 ID. Mendenhall, W.C. 110 Cape Darby from lauch. Nome quadrangle. Council District, Seward Penn. Alaska. ca. 1900. #1:/Mendenhall Collection/mwc00111 ID. Mendenhall, W.C. 111 Alexander's cabin and meadows, Chukajak Creek. Nome quadrangle. Council District, Seward Penn. Alaska. ca. 1900. #1:/Mendenhall Collection/mwc00112 ID. Mendenhall, W.C. 112 Vulcan Point and Tubutulik River. Nome quadrangle. Council District, Seward Penn. Alaska. ca. 1900. #1:/Mendenhall Collection/mwc00113 ID. Mendenhall, W.C. 113 Tubutulik Valley Nome quadrangle. Council District, Seward Penn. Alaska. ca. 1900. #1:/Mendenhall Collection/mwc00114 ID. Mendenhall, W.C. 114 View in Tubutulik Drainage Basin. Nome quadrangle. Council District, Seward Penn. Alaska. ca. 1900. #1:/Mendenhall Collection/mwc00115 ID. Mendenhall, W.C. 115 View in Tubutulik Valley. Nome quadrangle. Council District, Seward Penn. Alaska. ca. 1900. #1:/Mendenhall Collection/mwc00116 ID. Mendenhall, W.C. 116 View in Tubutulik Valley. Nome quadrangle. Council District, Seward Penn. Alaska. ca. 1900. #1:/Mendenhall Collection/mwc00117 ID. Mendenhall, W.C. 117 View 55 degrees North and east from point 1600 feet above camp. Nome quadrangle. Council District, Seward Penn. Alaska. August 13, 1900. #1:/Mendenhall Collection/mwc00118 ID. Mendenhall, W.C. 118 View 80 degrees South and east from point 1600 feet above camp. Nome quadrangle. Council District, Seward Penn. Alaska. August 13, 1900. #1:/Mendenhall Collection/mwc00119 ID. Mendenhall, W.C. 119 Granite Pinnacles in Tubutulik Valley. Nome quadrangle. Council District, Seward Penn. Alaska. ca. 1900. #1:/Mendenhall Collection/mwc00120 ID. Mendenhall, W.C. 120 Granite Spires, Tubutulik Valley. Nome quadrangle. Council District, Seward Penn. Alaska. ca. 1900. #1:/Mendenhall Collection/mwc00121 ID. Mendenhall, W.C. 121 Volcan Mountain Group. Tubutulik River. Nome quadrangle. Council District, Seward Penn. Alaska. ca. 1900. #1:/Mendenhall Collection/mwc00122 ID. Mendenhall, W.C. 122 Volcan Point, Tubutulik River. Nome quadrangle. Council District, Seward Penn. Alaska. ca. 1900. #1:/Mendenhall Collection/mwc00123 ID. Mendenhall, W.C. 123 Gravel Bluff, Tubutulik River. Nome quadrangle. Council District, Seward Penn. Alaska. ca. 1900. #1:/Mendenhall Collection/mwc00124 ID. Mendenhall, W.C. 124 Tubutulik River and mountains. Nome quadrangle. Council District, Seward Penn. Alaska. ca. 1900. #1:/Mendenhall Collection/mwc00125 ID. Mendenhall, W.C. 125 Calcareous Schist and Limestone Cliffs, Point, Inglestat. Nome quadrangle. Council District, Seward Penn. Alaska. ca. 1900. #1:/Mendenhall Collection/mwc00126 ID. Mendenhall, W.C. 126 Calcite veins in calcareous Schist. Nome quadrangle. Council District, Seward Penn. Alaska. ca. 1900. #1:/Mendenhall Collection/mwc00127 ID. Mendenhall, W.C. 127 Moutains south of Upper Koyuk River. Nome quadrangle. Council District, Seward Penn. Alaska. ca. 1900. #1:/Mendenhall Collection/mwc00128 ID. Mendenhall, W.C. 128 Ketchican, from streamboat deck. South East Alaska. ca 1900. #1:/Mendenhall Collection/mwc00129 ID. Mendenhall, W.C. 129 Crowd on wharf, Ketchican. South East Alaska. ca 1900. #1:/Mendenhall Collection/mwc00130 ID. Mendenhall, W.C. 130 North end of Ketchikan, entrance to Tongas Narrows. South East Alaska. ca 1900. #1:/Mendenhall Collection/mwc00131 ID. Mendenhall, W.C. 131 Cannery at Santa Ana. South East Alaska. ca 1900. #1:/Mendenhall Collection/mwc00132 ID. Mendenhall, W.C. 132 General view of Juneau, from beach sout of town. South East Alaska. ca 1900. #1:/Mendenhall Collection/mwc00133 ID. Mendenhall, W.C. 133 General view of Juneau, from heights to the north. South East Alaska. ca 1900. #1:/Mendenhall Collection/mwc00134 ID. Mendenhall, W.C. 134 Valley of Skagway River above the bridge 2 and 1/2 miles from Skagway. South East Alaska. ca 1900. #1:/Mendenhall Collection/mwc00135 ID. Mendenhall, W.C. 135 Lynn Canal and valley of Skagway River, from Wyite Pass and Yukon Trail near the summit. South East Alaska. ca 1900. #1:/Mendenhall Collection/mwc00136 ID. Mendenhall, W.C. 136 Water Front along Canadian Development Companies Warehouses, White Horse. Yukon Territaries. Canada. ca 1900. #1:/Mendenhall Collection/mwc00137 ID. Mendenhall, W.C. 137 Steamboats building along water front at White Horse. Yukon Territaries. Canada. ca 1900. #1:/Mendenhall Collection/mwc00138 ID. Mendenhall, W.C. 138 Silt Bluffs 75 feet high, opposite White Hourse. Yukon Territaries. Canada. ca 1900. #1:/Mendenhall Collection/mwc00139 ID. Mendenhall, W.C. 139 Dog Express at White Horse. Yukon Territaries. Canada. ca 1900. #1:/Mendenhall Collection/mwc00140 ID. Mendenhall, W.C. 140 The village of White Horse, looking north east from the top of the bluffs above the river. Yukon Territaries. Canada. ca 1900. #1:/Mendenhall Collection/mwc00141 ID. Mendenhall, W.C. 141 Tracking along Lake LaBarge. Yukon Territaries. Canada. ca 1900. #1:/Mendenhall Collection/mwc00142 ID. Mendenhall, W.C. 142 Loading canoes on sledge, Lake LaBarge. Yukon Territaries. Canada. ca 1900. #1:/Mendenhall Collection/mwc00143 ID. Mendenhall, W.C. 143 Sledging across Lake Labarge. Yukon Territaries. Canada. ca 1900. #1:/Mendenhall Collection/mwc00144 ID. Mendenhall, W.C. 144 Pushing boats off the heavy ice, Lake Labarge. Yukon Territaries. Canada. ca 1900. #1:/Mendenhall Collection/mwc00145 ID. Mendenhall, W.C. 145 Tracking along edge of the ice, Lake Labarge. Yukon Territaries. Canada. ca 1900. #1:/Mendenhall Collection/mwc00146 ID. Mendenhall, W.C. 146 Lining around rocks, Lake Labarge. Yukon Territaries. Canada. ca 1900. #1:/Mendenhall Collection/mwc00147 ID. Mendenhall, W.C. 147 Lining around rocks, Lake Labarge. Yukon Territaries. Canada. ca 1900. #1:/Mendenhall Collection/mwc00148 ID. Mendenhall, W.C. 148 A bad point on Lake Labarge. Yukon Territaries. Canada. ca 1900. #1:/Mendenhall Collection/mwc00149 ID. Mendenhall, W.C. 149 Bad traveling, Lake Labarge. Yukon Territaries. Canada. ca 1900. #1:/Mendenhall Collection/mwc00150 ID. Mendenhall, W.C. 150 Sledding across Lake Labarge. Yukon Territaries. Canada. ca 1900. #1:/Mendenhall Collection/mwc00151 ID. Mendenhall, W.C. 151 Approach to Five Finger Rapids. Yukon Territaries. Canada. ca 1900. #1:/Mendenhall Collection/mwc00152 ID. Mendenhall, W.C. 152 Approaching Five Finger Rapids, nearer view. Yukon Territaries. Canada. ca 1900. #1:/Mendenhall Collection/mwc00153 ID. Mendenhall, W.C. 153 View of Five Finger Rapids, from below. Yukon Territaries. Canada. ca 1900. #1:/Mendenhall Collection/mwc00154 ID. Mendenhall, W.C. 154 Distant view of Five Finger Rapids, from below. Yukon Territaries. Canada. ca 1900. #1:/Mendenhall Collection/mwc00155 ID. Mendenhall, W.C. 155 The steamer Bailey taking on wood along the Lewes. Yukon Territaries. Canada. ca 1900. #1:/Mendenhall Collection/mwc00156 ID. Mendenhall, W.C. 156 View along the Lewes below Five Fingers, showing 200 foot gravel terrace. Yukon Territaries. Canada. ca 1900. #1:/Mendenhall Collection/mwc00157 ID. Mendenhall, W.C. 157 Ragged corner of Dawson, near lower end of town. Yukon Territaries. Canada. ca 1900. #1:/Mendenhall Collection/mwc00158 ID. Mendenhall, W.C. 158 Stages and road house on Bonanza Creek at Claim 60 below. Yukon Territaries. Canada. ca 1900. #1:/Mendenhall Collection/mwc00159 ID. Mendenhall, W.C. 159 Claim Number 16, Eldorado, practically worked out. Yukon Territaries. Canada. ca 1900. #1:/Mendenhall Collection/mwc00160 ID. Mendenhall, W.C. 160 Eldorado from Claim number 5 or 6 above. Yukon Territaries. Canada. ca 1900. #1:/Mendenhall Collection/mwc00161 ID. Mendenhall, W.C. 161 Group of miners cabins on Bonanza Creek, 1 and 1/2 miles above forks. Yukon Territaries. Canada. ca 1900. #1:/Mendenhall Collection/mwc00162 ID. Mendenhall, W.C. 162 Cabin on Gold Hill. Yukon Territaries. Canada. ca 1900. #1:/Mendenhall Collection/mwc00163 ID. Mendenhall, W.C. 163 Cabin, windlasses and sluice boxes on gold Hill. Yukon Territaries. Canada. ca 1900. #1:/Mendenhall Collection/mwc00165 ID. Mendenhall, W.C. 165 Cleaning up on Lynchs Claim. Yukon Territaries. Canada. ca 1900. #1:/Mendenhall Collection/mwc00166 ID. Mendenhall, W.C. 166 Fleet of lower river steamers at Dawson. Yukon Territaries. Canada. 1901. #1:/Mendenhall Collection/mwc00167 ID. Mendenhall, W.C. 167 Front Street, Dawson. Yukon Territaries. Canada. 1901. #1:/Mendenhall Collection/mwc00168 ID. Mendenhall, W.C. 168 Suspension foot bridge across Klondike River at Dawson. Yukon Territaries. Canada. 1901. #1:/Mendenhall Collection/mwc00169 ID. Mendenhall, W.C. 169 Dogs waiting to be fed, at Fort Hamlin. Dall District, Yukon Region, Alaska. 1901. #1:/Mendenhall Collection/mwc00170 ID. Mendenhall, W.C. 170 Five dogs feeding one dish, Fort Hamlin. Dall District, Yukon Region, Alaska. 1901. #1:/Mendenhall Collection/mwc00171 ID. Mendenhall, W.C. 171 Fort Hamlin, Native Indians and birch bark canoes. Dall District, Yukon Region, Alaska. 1901. #1:/Mendenhall Collection/mwc00172 ID. Mendenhall, W.C. 172 Fort Hamlin, Native Indians and birch bark canoes. Dall District, Yukon Region, Alaska. 1901. #1:/Mendenhall Collection/mwc00173 ID. Mendenhall, W.C. 173 Mail Dogs at Fort Hamlin. Dall District, Yukon Region, Alaska. 1901. #1:/Mendenhall Collection/mwc00174 ID. Mendenhall, W.C. 174 Mail Dogs at Fort Hamlin hitched tandem. Dall District, Yukon Region, Alaska. 1901. #1:/Mendenhall Collection/mwc00175 ID. Mendenhall, W.C. 175 Dogs and driver at Fort Hamlin. Dall District, Yukon Region, Alaska. 1901. #1:/Mendenhall Collection/mwc00176 ID. Mendenhall, W.C. 176 Tina Coaly and Tab, Fort Hamlin. Dall District, Yukon Region, Alaska. 1901. #1:/Mendenhall Collection/mwc00177 ID. Mendenhall, W.C. 177 Tab,lead of the team. Dall District, Yukon Region, Alaska. 1901. #1:/Mendenhall Collection/mwc00178 ID. Mendenhall, W.C. 178 Prospectors on Dall River with horses on barge. Dall District, Yukon Region, Alaska. 1901. #1:/Mendenhall Collection/mwc00179 ID. Mendenhall, W.C. 179 Landing pack horses from barge, mouth of Dall River. Dall District, Yukon Region, Alaska. 1901. #1:/Mendenhall Collection/mwc00180 ID. Mendenhall, W.C. 180 Lunch on Dall River, 75 miles up river. Dall District, Yukon Region, Alaska. 1901. #1:/Mendenhall Collection/mwc00181 ID. Mendenhall, W.C. 181 Late Observations on Boulder Mountain, Plane Table Station No. 1. Dall District, Yukon Region, Alaska. 1901. #1:/Mendenhall Collection/mwc00182 ID. Mendenhall, W.C. 182 Mendenhall Party pulling big canoe through riffles on Dall River. Dall District, Yukon Region, Alaska. 1901. #1:/Mendenhall Collection/mwc00183 ID. Mendenhall, W.C. 183 Applegate carse poling small canoe up Dall River. Dall District, Yukon Region, Alaska. 1901. #1:/Mendenhall Collection/mwc00184 ID. Mendenhall, W.C. 184 Pulling small canoe through riffles. Dall District, Yukon Region, Alaska. 1901. #1:/Mendenhall Collection/mwc00185 ID. Mendenhall, W.C. 185 Lining big canoe around a tree. Dall District, Yukon Region, Alaska. 1901. #1:/Mendenhall Collection/mwc00186 ID. Mendenhall, W.C. 186 Lining big canoe through a riffle. Dall District, Yukon Region, Alaska. 1901. #1:/Mendenhall Collection/mwc00187 ID. Mendenhall, W.C. 187 Outcrop of Tertiary sediments on Coal Creek 3/4 mile above mouth Dall District, Yukon Region, Alaska. 1901. #1:/Mendenhall Collection/mwc00188 ID. Mendenhall, W.C. 188 Morning ablutions. Dall District, Yukon Region, Alaska. 1901. #1:/Mendenhall Collection/mwc00189 ID. Mendenhall, W.C. 189 On the Dall River Trail. Dall District, Ajukon Region, Alaska. 1901. #1:/Mendenhall Collection/mwc00190 ID. Mendenhall, W.C. 190 Plane Table workers and packers on Dall River Trail. Dall District, Ajukon Region, Alaska. 1901. #1:/Mendenhall Collection/mwc00191 ID. Mendenhall, W.C. 191 Summit Camp, Dall River Trail. Dall District, Ajukon Region, Alaska. 1901. #1:/Mendenhall Collection/mwc00192 ID. Mendenhall, W.C. 192 Summit Camp, Dall River Trail. Dall District, Ajukon Region, Alaska. 1901. #1:/Mendenhall Collection/mwc00193 ID. Mendenhall, W.C. 193 Summit Camp, Dall River Trail. Dall District, Ajukon Region, Alaska. 1901. #1:/Mendenhall Collection/mwc00194 ID. Mendenhall, W.C. 194 Ptarmigan. Dall District, Ajukon Region, Alaska. 1901. #1:/Mendenhall Collection/mwc00195 ID. Mendenhall, W.C. 195 Gorge in snowdrift at the head of Old Man Creek. Dall District, Ajukon Region, Alaska. 1901. #1:/Mendenhall Collection/mwc00196 ID. Mendenhall, W.C. 196 Camp of July 5 and 6 near lower end of flats. Old Man Creek. Dall District, Ajukon Region, Alaska. 1901. #1:/Mendenhall Collection/mwc00197 ID. Mendenhall, W.C. 197 Old Man Creek near camp in flats. Dall District, Ajukon Region, Alaska. 1901. #1:/Mendenhall Collection/mwc00198 ID. Mendenhall, W.C. 198 Building scows at White Horse. Yukon Territory, Canada, 1901. #1:/Alasks-Professional paper 45/mwc00199 ID. Mendenhall, W.C. 199 Lewes valley at White Horse, Yukon Territory, Canada, showing silt terraces. 1901, plate 25-B in U.S. Geological Survey. Professional paper 45. 1906. #1:/Mendenhall Collection/mwc00200 ID. Mendenhall, W.C. 200 Dawson, from bluffs at the lower edge of the city. Yukon Territory, Canada, 1901. #1:/Mendenhall Collection/mwc00201 ID. Mendenhall, W.C. 201 Looking down the Yukon from the bluffs at the lower end of Dawson. Yukon Territory, Canada, 1901. #1:/Mendenhall Collection/mwc00202 ID. Mendenhall, W.C. 202 Grand Forks, from base of the hills between Bonanza and Eldorado Creeks. Yukon Territory, Canada, 1901. #1:/Mendenhall Collection/mwc00203 ID. Mendenhall, W.C. 203 General view of Grand Forks from hill 200 feet above village showing Gold Hill on the left. Yukon Territory, Canada, 1901. #1:/Mendenhall Collection/mwc00204 ID. Mendenhall, W.C. 204 View Down Bonanza Creek from lower Eldorado, showing wide, washed terrace. Yukon Territory, Canada, 1901. #1:/Mendenhall Collection/mwc00205 ID. Mendenhall, W.C. 205 Claim No. 16, Eldorado, and the mouth of French Gulch. Yukon Territory, Canada, 1901. #1:/Mendenhall Collection/mwc00206 ID. Mendenhall, W.C. 206 Group of Cabins and Windlasses on Gold Hill. Yukon Territory, Canada, 1901. #1:/Mendenhall Collection/mwc00207 ID. Mendenhall, W.C. 207 General view of Cheechaco Hill and discovery on Bonanza, from west slope of Gold Hill. Yukon Territory, Canada, 1901. #1:/Mendenhall Collection/mwc00208 ID. Mendenhall, W.C. 208 East slope of Cheechaco Hill. Yukon Territory, Canada, 1901. #1:/Mendenhall Collection/mwc00209 ID. Mendenhall, W.C. 209 General view of Dawson, from hills south of Klondike River. Yukon Territory, Canada, 1901. #1:/Mendenhall Collection/mwc00210 ID. Mendenhall, W.C. 210 View up the Alestna River from a point 65 miles above its mouth. Koyukuk, Alaska, 1901. #1:/Mendenhall Collection/mwc00211 ID. Mendenhall, W.C. 211 Meanders of the Alestna River above Help Me Jack Creek, looking North 55 degrees and due East magnetic, from point 5 miles above mouth of Help Me Jack Creek. Koyukuk, Alaska, 1901. #1:/Mendenhall Collection/mwc00212 ID. Mendenhall, W.C. 212 West wall of Alatma Valley from knob north of Help Me Jack Creek, showing timber at 2500 feet A.T. Koyukuk, Alaska, 1901. #1:/Mendenhall Collection/mwc00213 ID. Mendenhall, W.C. 213 Rugged topography in Greestone of low Help Me Jack Creek, South 55 degrees and due West Magnetic, from knob north side of creek. Koyukuk, Alaska, 1901. #1:/Mendenhall Collection/mwc00214 ID. Mendenhall, W.C. 214 View up the valley of Help Me Jack Creek, from knob north of 1T, N. 55 degrees Magnetic. Lower Yukon, Alaska, 1901. #1:/Mendenhall Collection/mwc00215 ID. Mendenhall, W.C. 215 Nearing headwaters of Help Me Jack Creek. Lower Yukon, Alaska, 1901. #1:/Mendenhall Collection/mwc00216 ID. Mendenhall, W.C. 216 Looking down Help Me Jack Creek from near its head. Mountains of Chloritic Schist. Upper Yukon, Alaska, 1901. #1:/Mendenhall Collection/mwc00217 ID. Mendenhall, W.C. 217 View north across Help Me Jack Kobuck Divide. Upper Yukon, Alaska, 1901. #1:/Mendenhall Collection/mwc00218 ID. Mendenhall, W.C. 218 Looking up the first little gorge on the Kobuk River, 3/4 miles below Chekayakaka Creek. Seward Peninsula, Alaska, 1901. #1:/Mendenhall Collection/mwc00219 ID. Mendenhall, W.C. 219 Second Kobuk Rapids. Seward Peninsula, Alaska, 1901. #1:/Mendenhall Collection/mwc00220 ID. Mendenhall, W.C. 220 Looking into head of Kobuk Valley from lower end of Walker Lake. Seward Peninsula, Alaska, 1901. #1:/Mendenhall Collection/mwc00221 ID. Mendenhall, W.C. 221 View up Walker Lake from lower end. Seward Peninsula, Alaska, 1901. #1:/Mendenhall Collection/mwc00222 ID. Mendenhall, W.C. 222 View Walker Lake from the lower island. Brooks Range, Seward Peninsula, Alaska, 1901. #1:/Mendenhall Collection/mwc00223 ID. Mendenhall, W.C. 223 View up Walker Lake from lower island. Brooks Range, Seward Peninsula, Alaska, 1901. #1:/Mendenhall Collection/mwc00224 ID. Mendenhall, W.C. 224 Looking into Schistose Mountains at head of Walker Lake. Brooks Range, Seward Peninsula, Alaska, 1901. #1:/Mendenhall Collection/mwc00225 ID. Mendenhall, W.C. 225 Alternating Schist and Limestone strata in peak on north shore of Walker Lake near upper end. Brooks Range, Seward Peninsula, Alaska, 1901. #1:/Mendenhall Collection/mwc00226 ID. Mendenhall, W.C. 226 View down Lake Walker from near the upper end. Brooks Range, Seward Peninsula, Alaska, 1901. #1:/Mendenhall Collection/mwc00227 ID. Mendenhall, W.C. 227 Rapids in outlet of Walker Lake. Brooks Range, Seward Peninsula, Alaska, 1901. #1:/Mendenhall Collection/mwc00228 ID. Mendenhall, W.C. 228 Upper end of Nootoovukti [Nutuvukti] Lake and mountains, beyond, from station 77. Brooks Range, Seward Peninsula, Alaska, 1901. #1:/Mendenhall Collection/mwc00229 ID. Mendenhall, W.C. 229 Lady Mountian, from station 67. Brooks Range, Seward Peninsula, Alaska, 1901. #1:/Alasks-Professional paper 45/mwc00230 ID. Mendenhall, W.C. 230 Lower gorge of Kobuk River, draining a basin lowland, Alaska. 1898, plate 33-B in U.S. Geological Survey. Professional paper 45. 1906. #1:/Mendenhall Collection/mwc00231 ID. Mendenhall, W.C. 231 View along middle section of the lower Kobuk Rapids. Brooks Range, Seward Peninsula, Alaska, 1901. #1:/Mendenhall Collection/mwc00232 ID. Mendenhall, W.C. 232 Looking into the lower end of canyon of Kokuk from west side of the river. Brooks Range, Seward Peninsula, Alaska, 1901. #1:/Mendenhall Collection/mwc00233 ID. Mendenhall, W.C. 233 View into the canyon of Kobuk River from below. Brooks Range, Seward Peninsula, Alaska, 1901. #1:/Mendenhall Collection/mwc00234 ID. Mendenhall, W.C. 234 Bear killed on Kobuk River. Copper River, Alaska, 1901. #1:/Mendenhall Collection/mwc00235 ID. Mendenhall, W.C. 235 Cape of Klutina River. Copper River, Alaska, 1901. #1:/Mendenhall Collection/mwc00236 ID. Mendenhall, W.C. 236 Bluff of stratified silt and gravel on Klutina River. Copper River region, Alaska. 1902, plate 9-A in U.S. Geological Survey. Professional paper 41. 1905. #1:/Alaska-Copper River Region-Professional paper 41/mwc00237 ID. Mendenhall, W.C. 237 Junction of Copper and Tazlina Rivers. Copper River region, Alaska. 1902, plate 5-A in U.S. Geological Survey. Professional paper 41. 1905. Plate 25-A in U.S. Geological Survey. Professional paper 45. 1906. #1:/Alaska-Copper River Region-Professional paper 41/mwc00238 ID. Mendenhall, W.C. 238 Section of stratified Pleistocene on west bank of Copper River below the Tazlina. Copper River region, Alaska. 1902, plate 5-B in U.S. Geological Survey. Professional paper 41. 1905. #1:/Alaska-Copper River Region-Professional paper 41/mwc00239 ID. Mendenhall, W.C. 239 Structure induced in Pleistocene silts by overriding glacier, Tazlina River. Copper River region, Alaska. 1902, plate 9-B in U.S. Geological Survey. Professional paper 41. 1905. #1:/Mendenhall Collection/mwc00240 ID. Mendenhall, W.C. 240 First camp east bank of Copper River. Copper River, Alaska, 1901. #1:/Mendenhall Collection/mwc00241 ID. Mendenhall, W.C. 241 Camp east bank of Copper River, nearer than preceding. Copper River, Alaska, 1902. #1:/Mendenhall Collection/mwc00242 ID. Mendenhall, W.C. 242 Mt. Drum and Copper River Center. Foreground. Copper River, Alaska, 1902. #1:/Mendenhall Collection/mwc00243 ID. Mendenhall, W.C. 243 Mt. Drum and Copper River Center. Copper River, Alaska, 1902. #1:/Mendenhall Collection/mwc00244 ID. Mendenhall, W.C. 244 Number 1 Panorama. Mountains Drum, Wrangell, Sandfor, taken from bluff below Station Number 6. Copper River, Alaska, 1902. #1:/Mendenhall Collection/mwc00245 ID. Mendenhall, W.C. 245 General view of Mount Wrangell from Stock Mountain. Copper River region, Alaska. 1902, plate 8-A in U.S. Geological Survey. Professional paper 41. 1905. #1:/Mendenhall Collection/mwc00246 ID. Mendenhall, W.C. 246 Mt. Drum from bluff below Station Number 6. Copper River, Alaska, 1902. #1:/Mendenhall Collection/mwc00247 ID. Mendenhall, W.C. 247 Mt. Sanford from bluff below Station Number 6. Copper River, Alaska, 1902. #1:/Mendenhall Collection/mwc00248 ID. Mendenhall, W.C. 248 The great Col between Mt. Sanford and Mt. Wrangell. Wrangell District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00249 ID. Mendenhall, W.C. 249 Mt. Wrangell from bluff below Station Number 6. Wrangell District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00250 ID. Mendenhall, W.C. 250 Mt. Drum from Station Number 6. Wrangell District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00251 ID. Mendenhall, W.C. 251 Mt. Wrangell from Tonsina Bridge. Wrangell District, Copper River Region, Alaska, 1902. #1:/Alaska-Professional paper 15/mwc00252 ID. Mendenhall, W.C. 252 Mount Wrangell, view taken from the Government trail above Tonsina Bridge, 45 miles from the summit of the mountain. Wrangell district, Copper River region, Alaska. 1902. Plate 1-A in U.S. Geological Survey Professional paper 15. 1903. #1:/Alaska-Copper River Region-Professional paper 41/mwc00253 ID. Mendenhall, W.C. 253 Mount Drum from the Nadina trail. Copper River region, Alaska. 1902, plate 12-A in U.S. Geological Survey. Professional paper 41. 1905. #1:/Mendenhall Collection/mwc00254 ID. Mendenhall, W.C. 254 General view of upper valley of Little River below campl 6/5/8. Wrangell District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00255 ID. Mendenhall, W.C. 255 Mt. Drum and narrows of Little River, 1 mile below Copper Center Trail. Wrangell District, Copper River Region, Alaska, 1902. #1:/Alaska-Professional paper 15/mwc00256 ID. Mendenhall, W.C. 256 Nadina River bars, Mount Drum in background. Wrangell district, Copper River region, Alaska. Circa 1901. Plate 1-B in U.S. Geological Survey Professional paper 15. 1903. #1:/Mendenhall Collection/mwc00257 ID. Mendenhall, W.C. 257 Mt. Drum viewed from Little River Valley near Camp 6/5/8. Wrangell District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00258 ID. Mendenhall, W.C. 258 Mt. Drum and head of Little River Valley. Platinum Prospect Hole in foreground. Wrangell District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00259 ID. Mendenhall, W.C. 259 Looking from moraine of Nadena Glacier out on flood plain. Wrangell District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00260 ID. Mendenhall, W.C. 260 Summit of Mt. Drum from ride between Nadena and Klawasina River. Wrangell District, Copper River Region, Alaska, 1902. #1:/Alaska-Copper River Region-Professional paper 41/mwc00261 ID. Mendenhall, W.C. 261 Snider Peak from ridge between Nadina and Klawatena Glaciers. Copper River region, Alaska. 1902, plate 12-B in U.S. Geological Survey. Professional paper 41. 1905. #1:/Mendenhall Collection/mwc00262 ID. Mendenhall, W.C. 262 Snyders Peak and lava fields about the head of Dadena. Wrangell District, Copper River Region, Alaska, 1902. #1:/Alaska-Copper River Region-Professional paper 41/mwc00263 ID. Mendenhall, W.C. 263 Summit of Mount Wrangell after an ash shower. Copper River region, Alaska. 1902, plate 8-B in U.S. Geological Survey. Professional paper 41. 1905. #1:/Alaska-Copper River Region-Professional paper 41/mwc00264 ID. Mendenhall, W.C. 264 Form a panoramic view of the Amphitheater of Mount Drum. Copper River region, Alaska. 1902, plate 7 in U.S. Geological Survey. Professional paper 41. 1905. #1:/Alaska-Copper River Region-Professional paper 41/mwc00265 ID. Mendenhall, W.C. 265 Form a panoramic view of the Amphitheater of Mount Drum. Copper River region, Alaska. 1902, plate 7 in U.S. Geological Survey. Professional paper 41. 1905. #1:/Mendenhall Collection/mwc00266 ID. Mendenhall, W.C. 266 Panoramic view of inside of amphitheater of Mt. Drum from lateral moraine, Nadena Glacier. Wrangell District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00267 ID. Mendenhall, W.C. 267 Panoramic view of inside of amphitheater of Mt. Drum from lateral moraine, Nadena Glacier. Wrangell District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00268 ID. Mendenhall, W.C. 268 Panoramic view of inside of amphitheater of Mt. Drum from lateral moraine, Nadena Glacier. Snyders Peak. Wrangell District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00269 ID. Mendenhall, W.C. 269 Panoramic view of Mt. Drum and Klawatina Glacier. Wrangell District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00270 ID. Mendenhall, W.C. 270 Panorama. Ruddy Mountain showing columnar structure of lavas. Wrangell District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00271 ID. Mendenhall, W.C. 271 Ice Cataract at mouth of glacier tributary to Nadena Glacier. Wrangell District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00272 ID. Mendenhall, W.C. 272 Panorama of upper Nadena Valley from middle of valley floor 1 and 1/2 miles above camp 6/13/15. Mt. Drum. Wrangell District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00273 ID. Mendenhall, W.C. 273 Panorama of upper Nadena Valley from middle of valley floor 1 and 1/2 miles above camp 6/13/15. Hills between mountains Drum and Sanford. Wrangell District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00274 ID. Mendenhall, W.C. 274 Panorama of upper Nadena Valley from middle of valley floor 1 and 1/2 miles above camp 6/13/15. Looking toward Mt. Sanford. Wrangell District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00275 ID. Mendenhall, W.C. 275 Panorama of upper Nadena Valley from middle of valley floor 1 and 1/2 miles above camp 6/13/15. Andesite hills east of Nadena. Wrangell District, Copper River Region, Alaska, 1902. #1:/Alaska-Copper River Region-Professional paper 41/mwc00276 ID. Mendenhall, W.C. 276 South face of Mount Sanford from Dadina Valley Copper River region, Alaska. June 13, 1902, plate 3-B in U.S. Geological Survey. Professional paper 41. 1905. #1:/Mendenhall Collection/mwc00278 ID. Mendenhall, W.C. 278 Panorama from ridge east of Nadena River. Wrangell District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00279 ID. Mendenhall, W.C. 279 Looking north 25 degrees and west from ridge east of Nadena River, showing country southeast of Mt. Drum. Wrangell District, Copper River Region, Alaska, 1902. #1:/Alaska-Copper River Region-Professional paper 41/mwc00280 ID. Mendenhall, W.C. 280 Form a panorama of the Wrangell Mountains from Mount Drum (280) to lava hills and ridges at head of Dadina River (281) to Mount Sanford (282). Copper River region, Alaska. 1902. Plates 2-A and 2-B in U.S. Geological Survey. Professional paper 41. 1905. #1:/Alaska-Copper River Region-Professional paper 41/mwc00281 ID. Mendenhall, W.C. 281 Form a panorama of the Wrangell Mountains from Mount Drum (280) to lava hills and ridges at head of Dadina River (281) to Mount Sanford (282). Copper River region, Alaska. 1902. Plates 2-A and 2-B in U.S. Geological Survey. Professional paper 41. 1905. #1:/Alaska-Copper River Region-Professional paper 41/mwc00282 ID. Mendenhall, W.C. 282 Form a panorama of the Wrangell Mountains from Mount Drum (280) to lava hills and ridges at head of Dadina River (281) to Mount Sanford (282). Copper River region, Alaska. 1902. Plates 2-A and 2-B in U.S. Geological Survey. Professional paper 41. 1905. #1:/Alaska-Copper River Region-Professional paper 41/mwc00283 ID. Mendenhall, W.C. 283 Form a panorama of the Wrangell Mountains from Mount Wrangell and foothills (283) to Mount Blackburn and southern slopes of Wrangell (284) to lava ridges about the upper Chitaslena, with Tonsina Mountains in the background. Copper River region, Alaska. 1902, plates 2-C and 2-D in U.S. Geological Survey. Professional paper 41. 1905. #1:/Alaska-Copper River Region-Professional paper 41/mwc00284 ID. Mendenhall, W.C. 284 Form a panorama of the Wrangell Mountains from Mount Wrangell and foothills (283) to Mount Blackburn and southern slopes of Wrangell (284) to lava ridges about the upper Chitaslena, with Tonsina Mountains in the background. Copper River region, Alaska. 1902, plates 2-C and 2-D in U.S. Geological Survey. Professional paper 41. 1905. #1:/Alaska-Copper River Region-Professional paper 41/mwc00285 ID. Mendenhall, W.C. 285 Form a panorama of the Wrangell Mountains from Mount Wrangell and foothills (283) to Mount Blackburn and southern slopes of Wrangell (284) to lava ridges about the upper Chitaslena, with Tonsina Mountains in the background. Copper River region, Alaska. 1902, plates 2-C and 2-D in U.S. Geological Survey. Professional paper 41. 1905. #1:/Mendenhall Collection/mwc00286 ID. Mendenhall, W.C. 286 Panorama. Lava near Chugatch Range, Copper River Gap. Wrangell District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00287 ID. Mendenhall, W.C. 287 Wrangell Smoking. Wrangell District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00288 ID. Mendenhall, W.C. 288 Sheeted Andesite showing pseudo cross bedding on small Tributary of Nadina River. Wrangell District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00289 ID. Mendenhall, W.C. 289 Mt. Wrangell across upper Chitaslina River, looking about north 70 degrees east. Bar. 4350. Wrangell District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00290 ID. Mendenhall, W.C. 290 Scarps of columnar andesite, Chitaslina River, 3 miles below Camp 6/15/17. Wrangell District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00291 ID. Mendenhall, W.C. 291 Andesites overlying diorites, west side of west fork of Chitaslina. Wrangell District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00292 ID. Mendenhall, W.C. 292 Panorama. Mt. Wrangell, Chitaslina Glaciers and east wall of Chitaslina Valley. Wrangell District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00293 ID. Mendenhall, W.C. 293 Panorama. Mt. Wrangell, Chitaslina Glaciers and east wall of Chitaslina Valley. Wrangell District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00294 ID. Mendenhall, W.C. 294 Mt. Wrangell and Chitaslina Glacier from saddle between the east and west forks of river. Wrangell District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00295 ID. Mendenhall, W.C. 295 The mountain that smokes. Wrangell District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00296 ID. Mendenhall, W.C. 296 Panorama from Chitaslina Glaciers looking toward head of Chitaslina Valley. West wall of Chitaslina Valley. Wrangell District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00297 ID. Mendenhall, W.C. 297 Panorama. Ice Falls of Chitaslina Glacier. Wrangell District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00298 ID. Mendenhall, W.C. 298 Panorama. Mt. Wrangell. Wrangell District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00299 ID. Mendenhall, W.C. 299 Panorama. East wall of Chitaslina Valley. Wrangell District, Copper River Region, Alaska, 1902. #1:/Alaska-Copper River Region-Professional paper 41/mwc00300 ID. Mendenhall, W.C. 300 Head of east tributary of Chitaslina. Mt Wrangell in background. Barometer reads 5150. Wrangell District, Copper River Region, Alaska, 1902. Plate 15-B in U.S. Geological Survey. Professional paper 41. 1905. #1:/Alaska-Copper River Region-Professional paper 15/mwc00301 ID. Mendenhall, W.C. 301 Warner copper prospect and tunnel near mouth of Rock Creek. Wrangell district, Copper River region, Alaska. Circa 1901. Similar to plate 5-A in U.S. Geological Survey Professional paper 15. 1903. #1:/Mendenhall Collection/mwc00302 ID. Mendenhall, W.C. 302 Panorama. Looking south 3 degress and east from point 1400 feet above mouth of Rock Creek, on eastern bank. Wrangell District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00303 ID. Mendenhall, W.C. 303 Panorama. Looking south 38 degress and east from point 1400 feet above mouth of Rock Creek, on eastern bank. Wrangell District, Copper River Region, Alaska, 1902. #1:/Alaska-Professional paper 15/mwc00304 ID. Mendenhall, W.C. 304 Valley of Lime Creek, a tributary of Rock Creek. Wrangell district, Copper River region, Alaska. Circa 1901 Plate 5-B in U.S. Geological Survey Professional paper 15. 1903. #1:/Mendenhall Collection/mwc00305 ID. Mendenhall, W.C. 305 Glacier at head of east fork of Kotsina. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00306 ID. Mendenhall, W.C. 306 Glacier at head of north fork of Kotsina. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00307 ID. Mendenhall, W.C. 307 Greenstone Mountains at head of Roaring Gulch. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00308 ID. Mendenhall, W.C. 308 Down Kotsina from ridge between Roaring Gulch and Peacock Creek. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00309 ID. Mendenhall, W.C. 309 Mt. Blackburn and andesite and greenstone foothills, from ridge between Roaring Gulch and Peacock Creek. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00310 ID. Mendenhall, W.C. 310 Mt. Blackburn, looking up Kotsina Valley, from North Copper Creek. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00311 ID. Mendenhall, W.C. 311 Northwest slope Mt. Sanford from near Station 26. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00312 ID. Mendenhall, W.C. 312 Mt. Sanford from Camp 7/25/28. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00313 ID. Mendenhall, W.C. 313 Looking from Station 31 across upper valley of Copper toward Tokio Passes. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00314 ID. Mendenhall, W.C. 314 Looking from Station 31 toward east end of Connells Ridge. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00315 ID. Mendenhall, W.C. 315 Looking from Station 31. Connells Ridge. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00316 ID. Mendenhall, W.C. 316 Middle Valley of Mitchell Creek, from hill on south side, 4 miles above mouth. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00317 ID. Mendenhall, W.C. 317 View up east fork, Mitchell Creek, from hill 4 miles above mouth, showing dip of sediment to east. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00318 ID. Mendenhall, W.C. 318 Flats of lower Slana and Mountains east of them, from hill south of Mitchell Creek 4 miles above mouth. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00319 ID. Mendenhall, W.C. 319 Panorama. Looking up Mitchell Creek from ridge back of Camp 8/6/8. Barometer 3600. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00320 ID. Mendenhall, W.C. 320 Panorama. Ridge between Mitchell Creek and its eastern branch. Barometer 3600. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00321 ID. Mendenhall, W.C. 321 Panorama. Foot hills north of lower Mitchell Creek. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Alaska-Copper River Region-Professional paper 41/mwc00322 ID. Mendenhall, W.C. 322 General view of the upper valley of Ahtel Creek. Copper River region, Alaska. August 6 1902, plate 3-A in U.S. Geological Survey. Professional paper 41. 1905. #1:/Mendenhall Collection/mwc00323 ID. Mendenhall, W.C. 323 View up first western flat tributary of Mitchell Creek, from ridge north of camp. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00324 ID. Mendenhall, W.C. 324 Panorama. General view from moraine at head of west fork of Indian Creek. Gap leading into east fork. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00325 ID. Mendenhall, W.C. 325 Panorama. View from moraine near head of west fork of Indian Creek. Gap at its head. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00326 ID. Mendenhall, W.C. 326 Section of sediments on spur between Slana and Manconen Valley. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00327 ID. Mendenhall, W.C. 327 Panorama. Looking toward the head of the Slana from Station 44. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00328 ID. Mendenhall, W.C. 328 Panorama. Across the head of Eagle Creek from Station 44. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00329 ID. Mendenhall, W.C. 329 Panorama. Looking toward the Chistochina from Station 44. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00330 ID. Mendenhall, W.C. 330 Panorama. Across the upper Slana from Station 44. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00331 ID. Mendenhall, W.C. 331 Panorama. Slana Valley and mountains north of it. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00332 ID. Mendenhall, W.C. 332 Mt. Sanford from near Station 37. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00333 ID. Mendenhall, W.C. 333 North 20 Degrees East from point between Stations 44 and 45. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Alaska-Copper River Region-Professional paper 41/mwc00334 ID. Mendenhall, W.C. 334 General view of the upper portion of Mankomen Permian beds on Eagle creek. Copper River region, Alaska. 1902, plate 6-A in U.S. Geological Survey. Professional paper 41. 1905. #1:/Mendenhall Collection/mwc00335 ID. Mendenhall, W.C. 335 Panorama. From point between Station 44 and Station 45. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00336 ID. Mendenhall, W.C. 336 Panorama. Looking north 44 degrees and west from point between Station 44 and Station 45. Toward Station 45. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00337 ID. Mendenhall, W.C. 337 Panorama. Looking north 54 degrees and east from point between Station 44 and Station 45. Head of Slana River. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00338 ID. Mendenhall, W.C. 338 Panorama. Looking north 56 degress east from point between Stations 44 and 45. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00339 ID. Mendenhall, W.C. 339 Panorama. From point between Stations 44 and 45. Down Slana Valley. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Alaska-Copper River Region-Professional paper 41/mwc00340 ID. Mendenhall, W.C. 340 Profile of white limestone cliff above west fork of Eagle Creek. Kiskulana District, Copper River Region, Alaska, 1902. Plate 6-B in U.S. Geological Survey. Professional Paper 41. 1905. #1:/Mendenhall Collection/mwc00341 ID. Mendenhall, W.C. 341 Panorama. From point C W. of Eagle Creek. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00342 ID. Mendenhall, W.C. 342 Panorama. Looking north 18 degrees west from point C. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00343 ID. Mendenhall, W.C. 343 Panorama. Looking north 32 degrees east from point C. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00344 ID. Mendenhall, W.C. 344 View up ravine toward saddle leading to Slanamiddle Fork Divide. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00345 ID. Mendenhall, W.C. 345 Panorama. North 68 degrees east from point above the Slana Middle Fork Divide. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00346 ID. Mendenhall, W.C. 346 North 37 degrees from point above the Slana Middle Fork Divide. Showing glacier flowing into each stream. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00347 ID. Mendenhall, W.C. 347 North 2 degrees east from point above the Slana Middle Fork Divide. Showing glacier flowing into each stream. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00348 ID. Mendenhall, W.C. 348 North 32 degrees west from point above Slana middle fork divide. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00349 ID. Mendenhall, W.C. 349 North 59 degrees west from point above Slana middle fork divide. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00350 ID. Mendenhall, W.C. 350 1500 foot exposure carboniferous shale and limestone, east of upper middle fork, Chistochina River, near camp August 24, 27. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00351 ID. Mendenhall, W.C. 351 Pass leading from middle fork to Chisna, viewed from middle fork river bars, near camp August 24, 26. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00352 ID. Mendenhall, W.C. 352 Looking down the Chisna from point on ridge 3/4 mile above Camp 6/27. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00353 ID. Mendenhall, W.C. 353 Looking down the Chisna from point on ridge 3/4 mile above Camp 6/27. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00354 ID. Mendenhall, W.C. 354 Panorama. Head of Chisna from hill just below Chisna Middle Fork Divide. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00355 ID. Mendenhall, W.C. 355 Head of Chisna from Hill just below Chisna Middle Fork Divide. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00356 ID. Mendenhall, W.C. 356 Head of Chisna River from Hill just below Chisna Middle Fork Divide. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00357 ID. Mendenhall, W.C. 357 Slucing on lower Ruby Creek. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Alaska-Professional paper 15/mwc00358 ID. Mendenhall, W.C. 358 View of upper Ruby Gulch showing lower end of Jackpot claim. Wrangell district, Copper River region, Alaska. Circa 1901. Plate 10-B in U.S. Geological Survey Professional paper 15. 1903. #1:/Mendenhall Collection/mwc00359 ID. Mendenhall, W.C. 359 Operations on upper end of Jack Pot Claim. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00360 ID. Mendenhall, W.C. 360 Panorama. View up Slate Creek from Slate Creek side of Chisna Pass. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00361 ID. Mendenhall, W.C. 361 Panorama. Looking across Slate Creek from Slate Creek side of Chesna Pass. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00362 ID. Mendenhall, W.C. 362 Panorama. Looking down Slate Creek from Slate Creek Side of Chesna Pass. Kiskulana District, Copper River Region, Alaska, 1902. #1:/Mendenhall Collection/mwc00363 ID. Mendenhall, W.C. 363 Slate Creek and mouth of Miller Gulch, looking down stream. Gulkins District, Cooper River Region. Alaska. 1902. #1:/Alaska-Professional paper 15/mwc00364 ID. Mendenhall, W.C. 364 Miller Gulch, from bench opposite its mouth. Wrangell district, Copper River region, Alaska. Circa 1901. Plate 10-A in U.S. Geological Survey Professional paper 15. 1903. #1:/Mendenhall Collection/mwc00365 ID. Mendenhall, W.C. 365 Panorama. Part of Alaska Range, from Camp 9/4,7. Gulkins District, Cooper River Region. Alaska. 1902. #1:/Mendenhall Collection/mwc00366 ID. Mendenhall, W.C. 366 Panorama. Part of Alaska Range, from Camp 9/4,7. Gulkins District, Cooper River Region. Alaska. 1902. #1:/Mendenhall Collection/mwc00367 ID. Mendenhall, W.C. 367 Panorama. Part of Alaska Range, from Camp 9/4,7. Gulkins District, Cooper River Region. Alaska. 1902. #1:/Mendenhall Collection/mwc00368 ID. Mendenhall, W.C. 368 Panorama. Part of Alaska Range, from Camp 9/4,7. Hill in foreground of miocene strata. Gulkins District, Cooper River Region. Alaska. 1902. #1:/Mendenhall Collection/mwc00369 ID. Mendenhall, W.C. 369 Panorama. Part of Alaska Range, from Camp 9/4,7. Gulkins District, Cooper River Region. Alaska. 1902. #1:/Mendenhall Collection/mwc00370 ID. Mendenhall, W.C. 370 Panorama. Part of Alaska Range, from Camp 9/4,7. Gulkins District, Cooper River Region. Alaska. 1902. #1:/Mendenhall Collection/mwc00371 ID. Mendenhall, W.C. 371 Panorama. Part of Alaska Range, from Camp 9/4,7. Gulkins District, Cooper River Region. Alaska. 1902. #1:/Alaska-Copper River Region-Professional paper 41/mwc00372 ID. Mendenhall, W.C. 372 Form a panoramic view of the Alaska Range from the foot of Gakona Glacier, Copper River region, Alaska. September 1902, form plates 13-A and B in U.S. Geological Survey. Professional paper 41. 1905. #1:/Alaska-Copper River Region-Professional paper 41/mwc00373 ID. Mendenhall, W.C. 373 Form a panoramic view of the Alaska Range from the foot of Gakona Glacier, Copper River region, Alaska. September 1902, form plates 13-A and B in U.S. Geological Survey. Professional paper 41. 1905. #1:/Alaska-Copper River Region-Professional paper 41/mwc00374 ID. Mendenhall, W.C. 374 Form a panoramic view of the Alaska Range from the foot of Gakona Glacier, Copper River region, Alaska. September 1902, form plates 13-A and B in U.S. Geological Survey. Professional paper 41. 1905. #1:/Mendenhall Collection/mwc00375 ID. Mendenhall, W.C. 375 Camp in snow at Ernestine. Gulkins District, Cooper River Region. Alaska. 1902. #1:/Mendenhall Collection/mwc00376 ID. Mendenhall, W.C. 376 General view of silt bluffs along Little River, 1 and 1/2 miles above mouth. Gulkins District, Cooper River Region. Alaska. 1902. #1:/Mendenhall Collection/mwc00377 ID. Mendenhall, W.C. 377 Detail of Boulder Clay in bluff 1 mile above mouth of Little River. Bar. 1570. Gulkins District, Cooper River Region. Alaska. 1902. #1:/Mendenhall Collection/mwc00378 ID. Mendenhall, W.C. 378 Upper part of Pleistocene bluff 1 and 1/2 miles above mouth of Little River. Gulkins District, Cooper River Region. Alaska. 1902. #1:/Alaska-Copper River Region-Professional paper 41/mwc00379 ID. Mendenhall, W.C. 379 Wind blown crest of Pleistocene bluffs on Klawasi River. Copper River region, Alaska. 1902, plate 10-B in U.S. Geological Survey. Professional paper 41. 1905. #1:/Mendenhall Collection/mwc00380 ID. Mendenhall, W.C. 380 Mt. Drum and Copper Center. Slightly best of series for separation of mountain and sky. Gulkins District, Cooper River Region. Alaska. 1902. #1:/Mendenhall Collection/mwc00381 ID. Mendenhall, W.C. 381 Stickmans establishment. Gulkins District, Cooper River Region. Alaska. 1902. #1:/Mendenhall Collection/mwc00382 ID. Mendenhall, W.C. 382 Stickmans establishment. Gulkins District, Cooper River Region. Alaska. 1902. #1:/Mendenhall Collection/mwc00383 ID. Mendenhall, W.C. 383 View up Klutina from inner terrace showing well marked bench 25 feet below. 1/2 mile above Cooper Center. Gulkins District, Cooper River Region. Alaska. 1902. #1:/Alaska-Copper River Region-Professional paper 41/mwc00384 ID. Mendenhall, W.C. 384 Detail in boulder clay on Klutina River 6 miles above Copper Center. Copper River region, Alaska. 1902, plate 10-A in U.S. Geological Survey. Professional paper 41. 1905. #1:/Mendenhall Collection/mwc00385 ID. Mendenhall, W.C. 385 General view of Pleistocene section measured P. 20 N.B. 1, 6 miles above Copper Center, Klutina River. Gulkins District, Cooper River Region. Alaska. 1902. #1:/Mendenhall Collection/mwc00386 ID. Mendenhall, W.C. 386 Glimpse down Little River Valley from 1/4 mile below Copper Center Trail, with abondoned saw mill. Gulkins District, Cooper River Region. Alaska. 1902. #1:/Mendenhall Collection/mwc00387 ID. Mendenhall, W.C. 387 View up channel of Little River, from near site of old saw mill, showing torrential character of stream. Gulkins District, Cooper River Region. Alaska. 1902. #1:/Mendenhall Collection/mwc00388 ID. Mendenhall, W.C. 388 Source of Little River in Nadena Glacier. Gulkins District, Cooper River Region. Alaska. 1902. #1:/Mendenhall Collection/mwc00389 ID. Mendenhall, W.C. 389 Summit of Mt. Drum from slope above Nedena Glacier. Gulkins District, Cooper River Region. Alaska. 1902. #1:/Mendenhall Collection/mwc00390 ID. Mendenhall, W.C. 390 Details in Nadena Glacier about 6 miles above Camp 6/8. Gulkins District, Cooper River Region. Alaska. 1902. #1:/Mendenhall Collection/mwc00391 ID. Mendenhall, W.C. 391 View dwon Elliot Creek from Copper King Mine near head of creek. Gulkins District, Cooper River Region. Alaska. 1902. #1:/Mendenhall Collection/mwc00392 ID. Mendenhall, W.C. 392 Contour of massive limestone overlain by conglomerates of the Kennicott, north side Elliott Creek. Gulkins District, Cooper River Region. Alaska. 1902. #1:/Mendenhall Collection/mwc00393 ID. Mendenhall, W.C. 393 Pass from Elliott Creek to head of west fork Strelna Creek, from north slope of Elliott Creek Valley, 2 or 3 miles below head. Gulkins District, Cooper River Region. Alaska. 1902. #1:/Mendenhall Collection/mwc00394 ID. Mendenhall, W.C. 394 Indians of Gakona Ferry. Gulkins District, Cooper River Region. Alaska. 1902. #1:/Alaska/mwc00395 ID. Mendenhall, W.C. 395 Alaska. Braided stream at the junction of the Gakona River and Copper River, 1 mile below Gakona ford. #1:/Mendenhall Collection/mwc00396 ID. Mendenhall, W.C. 396 Fording the Gulyana River. Gulkins District, Cooper River Region. Alaska. 1902. #1:/Mendenhall Collection/mwc00397 ID. Mendenhall, W.C. 397 Part of pack train on Tonsina Bridge. Gulkins District, Cooper River Region. Alaska. 1902. #1:/Mendenhall Collection/mwc00398 ID. Mendenhall, W.C. 398 Indian Camp at Tonsina. Gulkins District, Cooper River Region. Alaska. 1902. #1:/Mendenhall Collection/mwc00399 ID. Mendenhall, W.C. 399 Indian Family at Tonsina. Gulkins District, Cooper River Region. Alaska. 1902. #1:/Mendenhall Collection/mwc00400 ID. Mendenhall, W.C. 400 Fixing Babes Pack. Gulkins District, Cooper River Region. Alaska. 1902. #1:/Mendenhall Collection/mwc00401 ID. Mendenhall, W.C. 401 The Barns. Gulkins District, Cooper River Region. Alaska. 1902. #1:/Mendenhall Collection/mwc00402 ID. Mendenhall, W.C. 402 Nearly to the summit of Thompson Pass. Gulkins District, Cooper River Region. Alaska. 1902. #1:/Mendenhall Collection/mwc00403 ID. Mendenhall, W.C. 403 On the summit of Thompson Pass. Gulkins District, Cooper River Region. Alaska. 1902. #1:/Mendenhall Collection/mwc00404 ID. Mendenhall, W.C. 404 Camp near summit of Thompson Pass. Gulkins District, Cooper River Region. Alaska. 1902. #1:/Mendenhall Collection/mwc00405 ID. Mendenhall, W.C. 405 View west from Shell Hill, near Yuha Oil Well, Colorado Desert. Imperial County, Calfornia. ca 1905. #1:/Mendenhall Collection/mwc00406 ID. Mendenhall, W.C. 406 Derrick and surroundings of Yuha Oil Well, Colorado Desert. Imperial County, Calfornia. ca 1905. #1:/Mendenhall Collection/mwc00407 ID. Mendenhall, W.C. 407 View across Carrizo Creek at Barretts Oil Well. Shows south end of Black Mountain and dissected Tertiary Clays. Imperial County, Calfornia. ca 1905. #1:/Mendenhall Collection/mwc00408 ID. Mendenhall, W.C. 408 View down Garnet Canyon and Carrizo Creek from Red Butte on Middle Garnet Canyon. Shows sandstone capped Monadnocks rising above peneplain and Superstition Mountain in the distance. Imperial County, Calfornia. ca 1905. #1:/California- Professional-paper 98/mwc00409 ID. Mendenhall, W.C. 409 The Barrett Canyon fossil coral reef: the reef is shown in the right middle ground. At this locality the corals rest directly upon the effusive rocks, which rise higher and form the surrounding hills. Imperial County, California. Circa 1905. Plate 93-A in U.S. Geological Survey. Professional paper 98. 1917. #1:/California- Professional-paper 98/mwc00410 ID. Mendenhall, W.C. 410 Fossil coral locality near head of Barrett Canyon: the basal beds of the Pliocene sandstones overlie the effusive rocks and dip to the right in the foreground of the view. The coral reef lies immediately upon the effusive rocks. Coyote Mountain in the background. Imperial County, California. Circa 1905. Plate 93-B in U.S. Geological Survey. Professional paper 98. 1917. #1:/Mendenhall Collection/mwc00411 ID. Mendenhall, W.C. 411 Boss of metamorphic limestone protruding into Miocene in middle of Garnet Canyon. Imperial County, Calfornia. ca 1905. #1:/Mendenhall Collection/mwc00412 ID. Mendenhall, W.C. 412 A meander in Garnet Canyon inherited from post Miocene Peneplain. Peneplain level in middle foreground, east end Carrizo Mountain and fossil locality in background. Imperial County, Calfornia. ca 1905. #1:/Mendenhall Collection/mwc00413 ID. Mendenhall, W.C. 413 Panorama with photo #mwc00414. Old Miocene beach as seen from sandstone ridge at Garnet Canyon. Shows yellow shales cut into bad lands in upper valley creek. San Diego County, Calfornia. ca 1905. #1:/Mendenhall Collection/mwc00414 ID. Mendenhall, W.C. 414 Panorama with photo #mwc00413. Old Miocene beach on west side of Carrizo Mountain. San Diego County, Calfornia. ca 1905. #1:/Mendenhall Collection/mwc00415 ID. Mendenhall, W.C. 415 View about southwest from Red Butte on middle Garnet Canyon. Shows west end of Carrizo Mountain, fossil locality and dissected Miocene Clays. Imperial County, Calfornia. Agust, 1909. #1:/Mendenhall Collection/mwc00416 ID. Mendenhall, W.C. 416 Panorama with photo mwc00417. Middle portion of Carrizo Mountain from above Barretts. Imperial County, Calfornia. Agust, 1909. #1:/Mendenhall Collection/mwc00417 ID. Mendenhall, W.C. 417 Panorama with photo mwc00416. West end Carrizo Mountain and Table Mountain. From above Barretts. Imperial County, Calfornia. Agust, 1909. #1:/California- Professional-paper 98/mwc00418 ID. Mendenhall, W.C. 418 Looking down Alverson Canyon from a point near its head. Coyote Wells Valley in middle distance. Fossil corals and mollusks are found all along the canyon in sandstones overlying shales. Imperial County, California. August 1909. Plate 92-A in U.S. Geological Survey. Professional paper 98. 1917. #1:/California- Professional-paper 98/mwc00419 ID. Mendenhall, W.C. 419 Looking north 35 degrees west across the mouth of Alverson Canyon, from Coyote Wells Valley. The fossiliferous Pliocene beds through which the shallow canyon is cut are shown in the middle ground. Imperial County, California. August 1909. Plate 92-B in U.S. Geological Survey. Professional paper 98. 1917. #1:/Mendenhall Collection/mwc00420 ID. Mendenhall, W.C. 420 View up San Timoteo Canyon from Smiley Heights near Redlands. San Bernardino County, Calfornia. ca 1904. #1:/Mendenhall Collection/mwc00421 ID. Mendenhall, W.C. 421 View down San Timoteo Canyon from Smiley Heights near Redlands. San Bernardino County, Calfornia. ca 1904. #1:/Mendenhall Collection/mwc00422 ID. Mendenhall, W.C. 422 San Bernardino Peak from Mill Creek Canyon, two miles above its mouth. San Bernardino County, Calfornia. ca 1904. #1:/Mendenhall Collection/mwc00423 ID. Mendenhall, W.C. 423 San Bernardino Peak from Mill Creek Canyon, two miles above its mouth. San Bernardino County, Calfornia. ca 1904. #1:/Mendenhall Collection/mwc00424 ID. Mendenhall, W.C. 424 View down Cajon Creek from Glen Ranch Keenbrook Road. Shows San Bernardino Mountains Front. Cajon Creek Valley and unreduced foothills on valley side of fault. San Bernardino County, Calfornia. 10 am. November 23, 1904. #1:/Mendenhall Collection/mwc00425 ID. Mendenhall, W.C. 425 Type of topography along Middle Lytle Creek above Applewhite Ranch. Garded Lytle Creek Valley in foreground, mountains of schist and intrusives in background. San Bernardino County, Calfornia. 9 am. November 23, 1904. #1:/Mendenhall Collection/mwc00426 ID. Mendenhall, W.C. 426 Intervalley bedrock knob northwest of San Bernardino, showing break in slope at surface of plain. San Bernardino County, Calfornia. 9 am. November 23, 1904. #1:/Mendenhall Collection/mwc00427 ID. Mendenhall, W.C. 427 The Arrowhead and vicinity from hills south of Arrowhead Colony. San Bernardino County, Calfornia. 1904. #1:/Mendenhall Collection/mwc00428 ID. Mendenhall, W.C. 428 Panorama with photos mwc00429 and mwc00430. Front of San Bernardino Mountains from hill near Arrowhead station. San Bernardino County, Calfornia. 1904. #1:/Mendenhall Collection/mwc00429 ID. Mendenhall, W.C. 429 Panorama with photos mwc00428 and mwc00430. Front of San Bernardino Mountains from hill near Arrowhead station. San Bernardino County, Calfornia. 1904. #1:/Mendenhall Collection/mwc00430 ID. Mendenhall, W.C. 430 Panorama with photos mwc00428 and mwc00429. Front of San Bernardino Mountains from hill near Arrowhead station. San Bernardino County, Calfornia. 1904. #1:/Mendenhall Collection/mwc00431 ID. Mendenhall, W.C. 431 West side of Arrowhead Colony and San Bernardino front from hill in valley near Arrowhead Station. San Bernardino County, Calfornia. 1904. #1:/Mendenhall Collection/mwc00432 ID. Mendenhall, W.C. 432 Dellamont and Claremont from Park Hill near San Jacinto. Riverside County, Calfornia. November 13, 1904 at 4pm. #1:/Mendenhall Collection/mwc00433 ID. Mendenhall, W.C. 433 South slope of mountains just north of San Jacinto showing junction of valley and mountain slopes. Riverside County, Calfornia. 1904. #1:/Mendenhall Collection/mwc00434 ID. Mendenhall, W.C. 434 San Jacinto and Tahquitz Peaks from Park Hill near San Jacinto. Riverside County, Calfornia. 1904. #1:/Mendenhall Collection/mwc00435 ID. Mendenhall, W.C. 435 Fault scarp in upper San Jacinto Valley above Richies Springs. Riverside County, Calfornia. 1904. #1:/Mendenhall Collection/mwc00436 ID. Mendenhall, W.C. 436 Upper end of San Jacinto Valley from the east end of Park Hill. Riverside County, Calfornia. 1904. #1:/Mendenhall Collection/mwc00437 ID. Mendenhall, W.C. 437 Mohave Desert vegetation, Yucca, Juniper, and Mescal. View north from desert road, three miles east of Sheep Creek. San Bernardino County, Calfornia. 1905. #1:/Mendenhall Collection/mwc00438 ID. Mendenhall, W.C. 438 Faulted, folder and overturned Alluvial Beds near head of Cajon Canyon. San Bernardino County, Calfornia. 1905. #1:/Mendenhall Collection/mwc00439 ID. Mendenhall, W.C. 439 East front of Old Baldy from Coldwater Trail. Elevation about 8,000 feet. San Bernardino County, Calfornia. Nov. 23, 1903. #1:/Mendenhall Collection/mwc00440 ID. Mendenhall, W.C. 440 Back Valley land gravel in face south edge of Mohave Desert. San Antonio Quadrangle. San Bernardino County, Calfornia. 1903. #1:/Mendenhall Collection/mwc00441 ID. Mendenhall, W.C. 441 Fault Line just north of Rock Creek. Four miles above Shoemakers Crystalline Rocks on left, Red Conglomerate in immediate forwground, Flinty Sandstone, Conglomerate and White Schist in the background. Cretaceous Shale Hills at the right. San Bernardino County, Calfornia. November 26, 1904. #1:/Mendenhall Collection/mwc00442 ID. Mendenhall, W.C. 442 Desert Vegetation in unirrigated part of San Bernardino Valley at the edge of the Lytle Creek Wash, below Marida Station. San Bernardino County, Calfornia. Oct. 30, 1903. #1:/Mendenhall Collection/mwc00443 ID. Mendenhall, W.C. 443 Modern erosion in granite. Cajon Pass Road one mile above Cajon Station. San Bernardino County, Calfornia. November, 1903. #1:/Mendenhall Collection/mwc00444 ID. Mendenhall, W.C. 444 Rose Mine, San Bernardino Mountains. San Bernardino County, Calfornia. November 3, 1903. #1:/Mendenhall Collection/mwc00445 ID. Mendenhall, W.C. 445 East Riverside from base of Box Springs Mountains. Near edge of Mesa. Four year old Orange Trees in left foreground. San Bernardino County, Calfornia. 1904. #1:/Mendenhall Collection/mwc00446 ID. Mendenhall, W.C. 446 Panorama with photos mwc00447,mwc00448, mwc00449, and mwc00450. General view of the west Riverside Colony. Riverside County, Calfornia. November 21, 1904. #1:/Mendenhall Collection/mwc00447 ID. Mendenhall, W.C. 447 Panorama with photos mwc00446,mwc00448, mwc00449, and mwc00450. General view of the west Riverside Colony. Riverside County, Calfornia. March 21, 1904. #1:/Mendenhall Collection/mwc00448 ID. Mendenhall, W.C. 448 Panorama with photos mwc00446,mwc00447, mwc00449, and mwc00450. General view of the west Riverside Colony. Riverside County, Calfornia. March 21, 1904. #1:/Mendenhall Collection/mwc00449 ID. Mendenhall, W.C. 449 Panorama with photos mwc00446,mwc00447, mwc00448, and mwc00450. General view of the west Riverside Colony. Riverside County, Calfornia. March 21, 1904. #1:/Mendenhall Collection/mwc00450 ID. Mendenhall, W.C. 450 Panorama with photos mwc00446,mwc00447, mwc00448, and mwc00449. General view of the west Riverside Colony. Riverside County, Calfornia. March 21, 1904. #1:/Mendenhall Collection/mwc00451 ID. Mendenhall, W.C. 451 View of east Riverside District from Smith Mountain, West Riverside. Riverside County, Calfornia. March 21, 1904. #1:/Mendenhall Collection/mwc00452 ID. Mendenhall, W.C. 452 Panorama with photos mwc00453, mwc00454, mwc00455, and mwc00456. General view of Redlands and San Bernardino Mountains from Smiley Heights. San Bernardino County, Calfornia. ca 1904. #1:/Mendenhall Collection/mwc00453 ID. Mendenhall, W.C. 453 Panorama with photos mwc00452, mwc00454, mwc00455, and mwc00456. General view of Redlands and San Bernardino Mountains from Smiley Heights. San Bernardino County, Calfornia. ca 1904. #1:/Mendenhall Collection/mwc00454 ID. Mendenhall, W.C. 454 Panorama with photos mwc00452, mwc00453, mwc00455, and mwc00456. General view of Redlands and San Bernardino Mountains from Smiley Heights. San Bernardino County, Calfornia. ca 1904. #1:/Mendenhall Collection/mwc00455 ID. Mendenhall, W.C. 455 Panorama with photos mwc00452, mwc00453, mwc00454, and mwc00456. General view of Redlands and San Bernardino Mountains from Smiley Heights. San Bernardino County, Calfornia. ca 1904. #1:/Mendenhall Collection/mwc00456 ID. Mendenhall, W.C. 456 Panorama with photos mwc00452, mwc00453, mwc00454, and mwc00455. General view of Redlands and San Bernardino Mountains from Smiley Heights. San Bernardino County, Calfornia. ca 1904. #1:/Mendenhall Collection/mwc00457 ID. Mendenhall, W.C. 457 Redlands and San Bernardino Peak. San Bernardino County, Calfornia. ca 1904. #1:/Mendenhall Collection/mwc00458 ID. Mendenhall, W.C. 458 Panorama with photos mwc00459, mwc00460, mwc00461 and mwc00462. General view of Riverside form Rubidoux Mountain. Riverside County, Calfornia. ca 1904. #1:/Mendenhall Collection/mwc00459 ID. Mendenhall, W.C. 459 Panorama with photos mwc00458, mwc00460, mwc00461 and mwc00462. General view of Riverside form Rubidoux Mountain. Riverside County, Calfornia. ca 1904. #1:/Mendenhall Collection/mwc00460 ID. Mendenhall, W.C. 460 Panorama with photos mwc00458, mwc00459, mwc00461 and mwc00462. General view of Riverside form Rubidoux Mountain. Riverside County, Calfornia. ca 1904. #1:/Mendenhall Collection/mwc00461 ID. Mendenhall, W.C. 461 Panorama with photos mwc00458, mwc00459, mwc00460 and mwc00462. General view of Riverside form Rubidoux Mountain. Riverside County, Calfornia. ca 1904. #1:/Mendenhall Collection/mwc00462 ID. Mendenhall, W.C. 462 Panorama with photos mwc00458, mwc00459, mwc00460 and mwc00461. General view of Riverside form Rubidoux Mountain. Riverside County, Calfornia. ca 1904. #1:/Mendenhall Collection/mwc00463 ID. Mendenhall, W.C. 463 Panorama with photos mwc00464, mwc00465, mwc00466 and mwc00467. View of the middle Santa Ana Valley and east Riverside from slopes of Slover Mountain. Riverside and San Bernardino Counties, Calfornia. ca 1904. #1:/Mendenhall Collection/mwc00464 ID. Mendenhall, W.C. 464 Panorama with photos mwc00464, mwc00465, mwc00466 and mwc00467. View of the middle Santa Ana Valley and east Riverside from slopes of Slover Mountain. Riverside and San Bernardino Counties, Calfornia. ca 1904. #1:/Mendenhall Collection/mwc00465 ID. Mendenhall, W.C. 465 Panorama with photos mwc00464, mwc00465, mwc00466 and mwc00467. View of the middle Santa Ana Valley and east Riverside from slopes of Slover Mountain. Riverside and San Bernardino Counties, Calfornia. ca 1904. #1:/Mendenhall Collection/mwc00466 ID. Mendenhall, W.C. 466 Panorama with photos mwc00463, mwc00464, mwc00465 and mwc00467. View of the middle Santa Ana Valley and east Riverside from slopes of Slover Mountain. Riverside and San Bernardino Counties, Calfornia. ca 1904. #1:/Mendenhall Collection/mwc00467 ID. Mendenhall, W.C. 467 Panorama with photos mwc00463, mwc00464, mwc00465 and mwc00466. View of the middle Santa Ana Valley and east Riverside from slopes of Slover Mountain. Riverside and San Bernardino Counties, Calfornia. ca 1904. #1:/Mendenhall Collection/mwc00468 ID. Mendenhall, W.C. 468 Unconformities in modern alluvium, north edge of east Riverside Mesa near Santa Fe Track. Riverside County, Calfornia. ca 1904. #1:/Mendenhall Collection/mwc00469 ID. Mendenhall, W.C. 469 Panorama with mcw00470. View of middle Santa Ana Valley from Bunker Hill. San Bernardino County, Calfornia. ca 1904. #1:/Mendenhall Collection/mwc00470 ID. Mendenhall, W.C. 470 Panorama with mcw00469. View of middle Santa Ana Valley from Bunker Hill. San Bernardino County, Calfornia. ca 1904. #1:/Mendenhall Collection/mwc00471 ID. Mendenhall, W.C. 471 Bunker Hill Dike from Bunker Hill. San Bernardino County, Calfornia. June 11, 1905. #1:/Mendenhall Collection/mwc00472 ID. Mendenhall, W.C. 472 Panorama with mwc00473. View of bad lands San Timoteo and Yucaipe Valleys from point of ridge three miles south of Smiley Heights. San Bernardino County, Calfornia. 1905. #1:/Mendenhall Collection/mwc00473 ID. Mendenhall, W.C. 473 Panorama with mwc00472. View of bad lands San Timoteo and Yucaipe Valleys from point of ridge three miles south of Smiley Heights. San Bernardino County, Calfornia. 1905. #1:/Mendenhall Collection/mwc00474 ID. Mendenhall, W.C. 474 Panorama with mwc00475. View of bad lands San Timoteo and Yucaipe Valleys from point of ridge three miles south of Smiley Heights. San Bernardino County, Calfornia. 1905. #1:/Mendenhall Collection/mwc00475 ID. Mendenhall, W.C. 475 Panorama with mwc00474. View of bad lands San Timoteo and Yucaipe Valleys from point of ridge three miles south of Smiley Heights. San Bernardino County, Calfornia. 1905. #1:/Mendenhall Collection/mwc00476 ID. Mendenhall, W.C. 476 Panorama with mwc00477. View of San Timoteo Canyon and Yucaipe Basin from a Point 1 mile south of Redlands Heights. San Bernardino County, Calfornia. ca 1904. #1:/Mendenhall Collection/mwc00477 ID. Mendenhall, W.C. 477 Panorama with mwc00476. View of San Timoteo Canyon and Yucaipe Basin from a Point 1 mile south of Redlands Heights. San Bernardino County, Calfornia. ca 1904. #1:/Mendenhall Collection/mwc00478 ID. Mendenhall, W.C. 478 Panorama with mwc00476. View of San Timoteo Canyon and Yucaipe Basin from a Point 1 mile south of Redlands Heights. San Bernardino County, Calfornia. ca 1904. #1:/Mendenhall Collection/mwc00479 ID. Mendenhall, W.C. 479 Panorama with mwc00476. View of San Timoteo Canyon and Yucaipe Basin from a Point 1 mile south of Redlands Heights. San Bernardino County, Calfornia. ca 1904. #1:/Mendenhall Collection/mwc00480 ID. Mendenhall, W.C. 480 Panorama with mwc00479. Vucaipe Valley from Redlands Heights. San Bernardino County, Calfornia. ca 1904. #1:/Mendenhall Collection/mwc00481 ID. Mendenhall, W.C. 481 Redlands Orange Tree in bearing. San Bernardino County, Calfornia. ca 1904. #1:/Mendenhall Collection/mwc00482 ID. Mendenhall, W.C. 482 Morton Canyon at mouth of Santa Ana Canyon. Folded Alluvium. Bernardino County, Calfornia. ca 1904. #1:/Mendenhall Collection/mwc00483 ID. Mendenhall, W.C. 483 Alluvial Bluffs along the Pacific Coast north of Santa Monica Canyon. Pacific Ocean in background. Los Angeles County, Calfornia. ca 1904. #1:/Mendenhall Collection/mwc00484 ID. Mendenhall, W.C. 484 Alluvial Bluffs at Santa Monica. Pacific Ocean in background. Los Angeles County, Calfornia. ca 1904. #1:/Mendenhall Collection/mwc00485 ID. Mendenhall, W.C. 485 Local channels in Alluvial Bluffs near mouth of at Santa Monica Canyon. Los Angeles County, Calfornia. ca 1904. #1:/Mendenhall Collection/mwc00486 ID. Mendenhall, W.C. 486 High stranded sand dunes just below Del Rey. Pacific Ocean in background. Los Angeles County, Calfornia. ca 1904. #1:/Mendenhall Collection/mwc00487 ID. Mendenhall, W.C. 487 Del Rey, showing coastal lagooons, salt marshes, and elevated sand dunes. Pacific Ocean in background. Los Angeles County, Calfornia. ca 1904. #1:/California/mwc00488 ID. Mendenhall, W.C. 488 Out Sunset Boulevard from old reservoir near north edge of Los Angeles. Los Angeles County, California. 1904. #1:/California/mwc00489 ID. Mendenhall, W.C. 489 Toward Hollywood from point on foothills one mile east of village, shows junction of coastal plain and Santa Monica Mountains. Los Angeles County, California. 1904. #1:/California/mwc00490 ID. Mendenhall, W.C. 490 Panorama from foothills one mile east of Hollywood, toward Los Angeles. Los Angeles County, California. 1904. #1:/California/mwc00491 ID. Mendenhall, W.C. 491 Panorama from foothills one mile east of Hollywood, toward Los Angeles. Los Angeles County, California. 1904. #1:/California/mwc00492 ID. Mendenhall, W.C. 492 View from east Kenwood toward Cajon Pass. Los Angeles County, California. 1904. #1:/California/mwc00493 ID. Mendenhall, W.C. 493 Panorama with mwc00494. Redlands and the San Bernardino Mountains from Smiley Heights. Los Angeles County, California. 1904. #1:/California/mwc00494 ID. Mendenhall, W.C. 494 Panorama with mwc00494. Redlands and the San Bernardino Mountains from Smiley Heights. Los Angeles County, California. 1904. #1:/California/mwc00495 ID. Mendenhall, W.C. 495 Division box at head of Ranchito and Los Nietos Ditches, Paso De Martolo. Los Angeles County, California. 1904. #1:/California/mwc00496 ID. Mendenhall, W.C. 496 Panorama with mwc00497. View west of Whittier Reservoir showing junction of foothills and coastal plain. Los Angeles County, California. 1904. #1:/California/mwc00497 ID. Mendenhall, W.C. 497 Panorama with mwc00497. View west of Whittier Reservoir showing junction of foothills and coastal plain. Los Angeles County, California. 1904. #1:/California/mwc00498 ID. Mendenhall, W.C. 498 Unlined section of Santa Ana Valley Canal above Burruel Point. California. 1910. #1:/California/mwc00499 ID. Mendenhall, W.C. 499 Walnut and Citrus Trees and Peanut Vines near Santa Ana. Orange County, California. 1910. #1:/California/mwc00500 ID. Mendenhall, W.C. 500 Unlined portion of Anaheim Canal. Orange County, California. 1910. #1:/California/mwc00501 ID. Mendenhall, W.C. 501 Lined portion of Anaheim Canal. Orange County, California. 1910. #1:/California/mwc00502 ID. Mendenhall, W.C. 502 Lined section of Santa Ana Canal near Orange. Orange County, California. 1910. #1:/California/mwc00503 ID. Mendenhall, W.C. 503 Crest of submerged dam. Santiago Canyon. Orange County, California. 1910. #1:/California/mwc00504 ID. Mendenhall, W.C. 504 Another view of Santiago Creek submerged dam. Orange County, California. 1910. #1:/California/mwc00505 ID. Mendenhall, W.C. 505 Water line on Butte west of Thermal, Colorado Desert. Riverside County, California. ca 1904. #1:/California/mwc00506 ID. Mendenhall, W.C. 506 Panorama with mwc00507. General view of water line on Colorado Desert near Thermal. Riverside County, California. ca 1904. #1:/California/mwc00507 ID. Mendenhall, W.C. 507 Panorama with mwc00506. General view of water line on Colorado Desert near Thermal. Riverside County, California. ca 1904. #1:/California/mwc00508 ID. Mendenhall, W.C. 508 Old sand beach at base of Santa Rosa Mountains, west of Thermal. Riverside County, California. ca 1904. #1:/California/mwc00509 ID. Mendenhall, W.C. 509 Sand beach and sea cliff along old water line back of Toro. Riverside County, California. ca 1904. #1:/California/mwc00510 ID. Mendenhall, W.C. 510 Beach and sea cliff near Toro. Riverside County, California. ca 1904. #1:/California/mwc00511 ID. Mendenhall, W.C. 511 Beach and sea cliff near Toro. San Diego County, California. ca 1905. #1:/California/mwc00512 ID. Mendenhall, W.C. 512 Panorama with mwc00513. Water line along the west side of Colorado Desert, three miles south ofFigtree Johns. San Diego County, California. ca 1905. #1:/California/mwc00513 ID. Mendenhall, W.C. 513 Panorama with mwc00512. Water line along the west side of Colorado Desert, three miles south of Figtree Johns. San Diego County, California. ca 1905. #1:/California/mwc00514 ID. Mendenhall, W.C. 514 Panorama with mwc00515. General view of the Colorado Desert from Knob back of Figtree Johns. San Diego County, California. ca 1905. #1:/California/mwc00515 ID. Mendenhall, W.C. 515 Panorama with mwc00514. General view of the Colorado Desert from Knob back of Figtree Johns. San Diego County, California. ca 1905. #1:/California/mwc00516 ID. Mendenhall, W.C. 516 Panorama with mwc00515. General view of the Colorado Desert from Knob back of Figtree Johns. San Diego County, California. ca 1905. #1:/Mendenhall Collection/mwc00517 ID. Mendenhall, W.C. 517 Panorama with photos mwc00518, mwc00519, mwc00520 and mwc00521. General view of the Salton Sea from back of Figtree Johns. Riverside or Imperial Counties, Calfornia. October, 1906. #1:/Mendenhall Collection/mwc00518 ID. Mendenhall, W.C. 518 Panorama with photos mwc00517, mwc00519, mwc00520 and mwc00521. General view of the Salton Sea from back of Figtree Johns. Riverside or Imperial Counties, Calfornia. October, 1906. #1:/Mendenhall Collection/mwc00519 ID. Mendenhall, W.C. 519 Panorama with photos mwc00517, mwc00518, mwc00520 and mwc00521. General view of the Salton Sea from back of Figtree Johns. Riverside or Imperial Counties, Calfornia. October, 1906. #1:/Mendenhall Collection/mwc00520 ID. Mendenhall, W.C. 520 Panorama with photos mwc00517, mwc00518, mwc00519 and mwc00521. General view of the Salton Sea from back of Figtree Johns. Riverside or Imperial Counties, Calfornia. October, 1906. #1:/Mendenhall Collection/mwc00521 ID. Mendenhall, W.C. 521 Panorama with photos mwc00517, mwc00518, mwc00519 and mwc00520. General view of the Salton Sea from back of Figtree Johns. Riverside or Imperial Counties, Calfornia. October, 1906. #1:/Mendenhall Collection/mwc00522 ID. Mendenhall, W.C. 522 East edge of sand dune area near Mammoth Station. Imperial County, California. ca 1905. #1:/Mendenhall Collection/mwc00523 ID. Mendenhall, W.C. 523 Looking westward into the sand dune area from near its eastern edge. Mammoth Station. Imperial County, California. ca 1905. #1:/Mendenhall Collection/mwc00524 ID. Mendenhall, W.C. 524 Desert erosion in Red Canyon. Six miles east of Mecca. Showing contact between Tertiaries and Metamorphics. Riverside County, California. ca 1905. #1:/Mendenhall Collection/mwc00525 ID. Mendenhall, W.C. 525 Boss of Metamorphics protruding through Tertiaries east of Mecca. Riverside County, California. ca 1905. #1:/Mendenhall Collection/mwc00526 ID. Mendenhall, W.C. 526 Base of Tertiary rocks in Red Canyon east of Mecca. Riverside County, California. ca 1905. #1:/Mendenhall Collection/mwc00527 ID. Mendenhall, W.C. 527 Metamorphic rocks beneath the Tertiaries in Red Canyon east of Mecca. Riverside County, California. ca 1905. #1:/Mendenhall Collection/mwc00528 ID. Mendenhall, W.C. 528 View into the head of the Red Canyon east of Mecca. Riverside County, California. ca 1905. #1:/Mendenhall Collection/mwc00529 ID. Mendenhall, W.C. 529 Folded Tertiary alluvium, west of Indio. Riverside County, California. ca 1905. #1:/Mendenhall Collection/mwc00530 ID. Mendenhall, W.C. 530 Panorama with photos mwc00531, mwc00532 and mwc00533. Riverside County, California. ca 1905. #1:/Mendenhall Collection/mwc00531 ID. Mendenhall, W.C. 531 Panorama with photos mwc00530, mwc00532 and mwc00533. Riverside County, California. ca 1905. #1:/Mendenhall Collection/mwc00532 ID. Mendenhall, W.C. 532 Panorama with photos mwc00530, mwc00531 and mwc00533. Riverside County, California. ca 1905. #1:/Mendenhall Collection/mwc00533 ID. Mendenhall, W.C. 533 Panorama with photos mwc00530, mwc00531 and mwc00532. Riverside County, California. ca 1905. #1:/Mendenhall Collection/mwc00534 ID. Mendenhall, W.C. 534 Panorama with photos mwc00535, and mwc00536. Ramona Valley. San Diego County, California. ca 1905. #1:/Mendenhall Collection/mwc00535 ID. Mendenhall, W.C. 535 Panorama with photos mwc00534, and mwc00536. Ramona Valley. San Diego County, California. ca 1905. #1:/Mendenhall Collection/mwc00536 ID. Mendenhall, W.C. 536 Panorama with photos mwc00534, and mwc00535. Ramona Valley. San Diego County, California. ca 1905. #1:/Mendenhall Collection/mwc00537 ID. Mendenhall, W.C. 537 Panorama with mwc00538. Intake 12 miles below Yuma. Yuma County, Arizona. Summer of 1905. #1:/Mendenhall Collection/mwc00538 ID. Mendenhall, W.C. 538 Panorama with mwc00538. Intake 12 miles below Yuma. Yuma County, Arizona. Summer of 1905. #1:/Mendenhall Collection/mwc00539 ID. Mendenhall, W.C. 539 Remnant of diversion works, 12 miles below Yuma. Yuma County, Arizona. Summer of 1905. #1:/Mendenhall Collection/mwc00540 ID. Mendenhall, W.C. 540 Panorama with mwc00541, mwc00542, and mwc00543. Glendora County, California. 1904 #1:/Mendenhall Collection/mwc00541 ID. Mendenhall, W.C. 541 Panorama with mwc00540, mwc00542, and mwc00543. Glendora County, California. 1904 #1:/Mendenhall Collection/mwc00542 ID. Mendenhall, W.C. 542 Panorama with mwc00540, mwc00541, and mwc00543. Glendora County, California. 1904 #1:/Mendenhall Collection/mwc00543 ID. Mendenhall, W.C. 543 Panorama with mwc00540, mwc00541, and mwc00542. Glendora County, California. 1904 #1:/Mendenhall Collection/mwc00544 ID. Mendenhall, W.C. 544 Panorama with mwc00545, and mwc00546. Los Angeles County, California. 1904 #1:/Mendenhall Collection/mwc00545 ID. Mendenhall, W.C. 545 Panorama with mwc00544, and mwc00546. Los Angeles County, California. 1904 #1:/Mendenhall Collection/mwc00546 ID. Mendenhall, W.C. 546 Panorama with mwc00544, and mwc00545. Los Angeles County, California. 1904 #1:/Mendenhall Collection/mwc00547 ID. Mendenhall, W.C. 547 Cucamonga Peak from north of Ontario. San Bernardino County, California. 1905 #1:/Mendenhall Collection/mwc00548 ID. Mendenhall, W.C. 548 San Dimas Canyon. Los Angeles County, California. 1904 #1:/Mendenhall Collection/mwc00549 ID. Mendenhall, W.C. 549 View down San Jose Creek from Pomona Park. Los Angeles County, California. 1904 #1:/Mendenhall Collection/mwc00550 ID. Mendenhall, W.C. 550 North Pasadena and the San Gabriel Mountains from Monk Hill. Los Angeles County, California. 1904 #1:/Mendenhall Collection/mwc00551 ID. Mendenhall, W.C. 551 Panorama with photo mwc00552. Wash of Arroyo Seco above the Devils Gate. Los Angeles County, California. 1904 #1:/Mendenhall Collection/mwc00552 ID. Mendenhall, W.C. 552 Panorama with photo mwc00551. Wash of Arroyo Seco above the Devils Gate. Los Angeles County, California. 1904 #1:/Mendenhall Collection/mwc00553 ID. Mendenhall, W.C. 553 Devils Gate. Los Angeles County, California. 1904 #1:/Mendenhall Collection/mwc00554 ID. Mendenhall, W.C. 554 Submerged Dam above the Devils Gate. Los Angeles County, California. 1904 #1:/Mendenhall Collection/mwc00555 ID. Mendenhall, W.C. 555 Another view of submerged dam above the Devils Gate. Los Angeles County, California. 1904 #1:/Mendenhall Collection/mwc00556 ID. Mendenhall, W.C. 556 Submerged dam at Sheep Corrall Springs, Pasadena. Los Angeles County, California. 1904 #1:/Mendenhall Collection/mwc00557 ID. Mendenhall, W.C. 557 Another view of submerged dam at Sheep Corrall Springs, Pasadena. Los Angeles County, California. 1904 #1:/Mendenhall Collection/mwc00558 ID. Mendenhall, W.C. 558 Panorama with photo mwc00559. Mouth of Kern Canyon and vicinity. Kern County, California. 1904 #1:/Mendenhall Collection/mwc00559 ID. Mendenhall, W.C. 559 Panorama with photo mwc00558. Mouth of Kern Canyon and vicinity. Kern County, California. 1904 #1:/California-Professional paper 116/mwc00560 ID. Mendenhall, W.C. 560 Form a panorama; Devils Kitchen, San Emigdio Canyon, looking east across canyon. The sharp peak a the right is Eagle Rest. The massive beds forming Eagle Rest are marine Oligocene; shale of the Tejon formation covers the broad slope to the right of this peak. Kern County, California. Circa 1910. Plate 8 in U.S. Geological Survey. Professional paper 116. 1920. #1:/California-Professional paper 116/mwc00561 ID. Mendenhall, W.C. 561 Form a panorama; Devils Kitchen, San Emigdio Canyon, looking east across canyon. The sharp peak a the right is Eagle Rest. The massive beds forming Eagle Rest are marine Oligocene; shale of the Tejon formation covers the broad slope to the right of this peak. Kern County, California. Circa 1910. Plate 8 in U.S. Geological Survey. Professional paper 116. 1920. #1:/California-Professional paper 116/mwc00562 ID. Mendenhall, W.C. 562 Form a panorama; Devils Kitchen, San Emigdio Canyon, looking east across canyon. The sharp peak a the right is Eagle Rest. The massive beds forming Eagle Rest are marine Oligocene; shale of the Tejon formation covers the broad slope to the right of this peak. Kern County, California. Circa 1910. Plate 8 in U.S. Geological Survey. Professional paper 116. 1920. #1:/Water Supply Paper 220/mwc00563 ID. Mendenhall, W.C. 563 Gray Butte, Gib Juniper Mountain and Alkali Lake. Lake County, Oregon. 1904. Published in U.S. Geological Survey. Water Supply Paper 220. Plate 7-B. 1908. #1:/Mendenhall Collection/mwc00564 ID. Mendenhall, W.C. 564 Table Rock and Silver Lake. Lake County, Oregon. 1904 #1:/Mendenhall Collection/mwc00565 ID. Mendenhall, W.C. 565 South end of fault block between Lake Albert and Chewaucan Marsh. Lake County, Oregon. 1904 #1:/Mendenhall Collection/mwc00566 ID. Mendenhall, W.C. 566 Town of Paisley. Lake County, Oregon. 1904 #1:/Mendenhall Collection/mwc00567 ID. Mendenhall, W.C. 567 Lake view. County Seat of Lake County. Lake County, Oregon. November 1906 #1:/Mendenhall Collection/mwc00568 ID. Mendenhall, W.C. 568 Precious Tourmaline Mines at Pala. San Diego County, California. 1905 #1:/Mendenhall Collection/mwc00569 ID. Mendenhall, W.C. 569 San Jacinto River in Flood. Railroad Canyon Above Elsinore. Riverside County, California. 1905 #1:/Mendenhall Collection/mwc00570 ID. Mendenhall, W.C. 570 San Jacinto River in Flood at western end of Perris Valley. Riverside County, California. 1905 #1:/Mendenhall Collection/mwc00571 ID. Mendenhall, W.C. 571 San Jacinto River in flood at western end of Perris Valley. Riverside County, California. 1905 #1:/Mendenhall Collection/mwc00572 ID. Mendenhall, W.C. 572 Wrecked Pile Dam at lower intake of Imperial Canal System. Baja Calfornia, Mexico. 1905 #1:/Mendenhall Collection/mwc00573 ID. Mendenhall, W.C. 573 Abandoned pile and Sand Bag Diversion Dam at lower intake of Imperial Canal. Baja Calfornia, Mexico. 1905 #1:/Mendenhall Collection-Water Supply Paper 497/mwc00574 ID. Mendenhall, W.C. 574 Flooded portion of Southern Pacific Railroad near Salton. Riverside County, Calfornia. 1905. U.S. Geological Survey, Water Supply Paper 497. Plate 4-A. 1923. #1:/Mendenhall Collection/mwc00575 ID. Mendenhall, W.C. 575 Flooded portion of Southern Pacific Railroad near Salton. Riverside County, Calfornia. 1905 #1:/Mendenhall Collection/mwc00576 ID. Mendenhall, W.C. 576 Thirteen Thousand Feet per second of Colorado River waters flowing through New River. Colorado Desert. Imperial County, Calfornia. Summer, 1905 #1:/Mendenhall Collection/mwc00577 ID. Mendenhall, W.C. 577 Flooded homestead in Imperial Valley near Five Headings. Imperial County, Calfornia. Summer, 1905 #1:/Mendenhall Collection/mwc00578 ID. Mendenhall, W.C. 578 Overflow lands, Imperial Valley near Five Headings. Imperial County, Calfornia. Summer, 1905 #1:/Mendenhall Collection-Water Supply Paper 225/mwc00579 ID. Mendenhall, W.C. 579 An arroyo cut in the Imperial Valley along former canal line as a result of Colorado River Waters. Imperial County, Calfornia. Summer, 1905 U.S. Geological Survey. Water Supply Paper 225. Plate 6-B. 1909. #1:/Mendenhall Collection/mwc00580 ID. Mendenhall, W.C. 580 Partially submerged works of Liverpool Salt Company, Salton Sink at the beginnning of the inflow of Colorado River. Imperial County, Calfornia. Summer, 1905 #1:/Mendenhall Collection/mwc00581 ID. Mendenhall, W.C. 581 Wreck of Flume No. 8 at crossing of New River, Imperial Valley. Imperial County, Calfornia. Summer, 1905 #1:/Mendenhall Collection/mwc00582 ID. Mendenhall, W.C. 582 New River, Imperial Valley, near Five Headings. Imperial County, Calfornia. Summer, 1905 #1:/Mendenhall Collection/mwc00583 ID. Mendenhall, W.C. 583 Cut bank along New River near Imperial. Imperial County, California. 1905 #1:/Mendenhall Collection/mwc00584 ID. Mendenhall, W.C. 584 New River cutting its bank near Imperial. Imperial County, California. Summer, 1905 #1:/Mendenhall Collection/mwc00585 ID. Mendenhall, W.C. 585 Flooded homestead near Five Headings, Imperial Valley. Imperial County, California. Summer, 1905 #1:/Mendenhall Collection/mwc00586 ID. Mendenhall, W.C. 586 Cutting along New River near Imperial. Imperial County, California. Summer, 1905 #1:/Mendenhall Collection/mwc00588 ID. Mendenhall, W.C. 588 Wrecked Adobe building at Mexicala as a result of the back cutting of New River. Baja California, Mexico. Summer 1906. #1:/Mendenhall Collection/mwc00589 ID. Mendenhall, W.C. 589 View of New Cut Gorge of New River and wrecked buildings at Mexicala. Baja California, Mexico. Summer 1906. #1:/Mendenhall Collection/mwc00590 ID. Mendenhall, W.C. 590 General view of New River looking down from Mexicala. Baja California, Mexico. Summer 1906. #1:/Mendenhall Collection/mwc00591 ID. Mendenhall, W.C. 591 General view of New River looking down from Mexicala. Baja California, Mexico. Summer 1906. #1:/Mendenhall Collection/mwc00592 ID. Mendenhall, W.C. 592 Ferry in New Cut Gorge of New River at Calexico. Baja California, Mexico. Summer 1906. #1:/Mendenhall Collection/mwc00593 ID. Mendenhall, W.C. 593 View down Old Imperial Canal channel from Rockwood Gate at Imperial Canal Heading. Baja California, Mexico. Autumn, 1906. #1:/Mendenhall Collection/mwc00594 ID. Mendenhall, W.C. 594 Work train on protective dike near Mexican intake of Imperial Canal. Baja California, Mexico. Autumn, 1906. #1:/Mendenhall Collection/mwc00595 ID. Mendenhall, W.C. 595 Abondoned dredge on Colorado River near Mexican intake. Baja California, Mexico. Autumn, 1906. #1:/Mendenhall Collection/mwc00596 ID. Mendenhall, W.C. 596 Dry bed of Imperial Canal above Mexican intake. Baja California, Mexico. Autumn, 1906. #1:/Mendenhall Collection/mwc00597 ID. Mendenhall, W.C. 597 At work on Colorado River Levee just above the Break of December. Baja California, Mexico. Autumn, 1906. #1:/Mendenhall Collection/mwc00598 ID. Mendenhall, W.C. 598 View up protective levee from Hind Dam. Imperial Canal System. Baja California, Mexico. Autumn, 1906. #1:/Mendenhall Collection/mwc00599 ID. Mendenhall, W.C. 599 Upstream side of concrete headgate, Imperial Canal System. Baja California, Mexico. Autumn, 1906. #1:/Mendenhall Collection/mwc00600 ID. Mendenhall, W.C. 600 Wrecked Rockwood Gate, Imperial Canal System. Baja California, Mexico. Autumn, 1906. #1:/Mendenhall Collection/mwc00601 ID. Mendenhall, W.C. 601 Boundary Monument near Calexico, Baja California, Mexico. Autumn, 1906. #1:/Mendenhall Collection/mwc00602 ID. Mendenhall, W.C. 602 Break through the levee below the Hind Dam. Imperial Canal System. Baja California, Mexico. Autumn, 1906. #1:/Mendenhall Collection/mwc00603 ID. Mendenhall, W.C. 603 View toward Pilot Knob along inner side of protective levee from a point near the Break of December. Baja California, Mexico. Autumn, 1906. #1:/Mendenhall Collection/mwc00604 ID. Mendenhall, W.C. 604 Deep cut at Calexico and Ferry Boat in operation. Baja California, Mexico. Summer, 1906. #1:/Mendenhall Collection/mwc00605 ID. Mendenhall, W.C. 605 End of protective levee where cut through by Colorado River as a result of Break of December. Baja California, Mexico. Summer, 1906. #1:/Mendenhall Collection/mwc00606 ID. Mendenhall, W.C. 606 Rock work on Laguna Dam above Yuma. Yuma County, Arizona. December 1906. #1:/Mendenhall Collection/mwc00607 ID. Mendenhall, W.C. 607 Power scraper at work on Laguna Dam above Yuma. Yuma County, Arizona. December 1906. #1:/Mendenhall Collection/mwc00608 ID. Mendenhall, W.C. 608 View of eastern end of Laguna Dam Site. Yuma County, Arizona. Summer, 1906. #1:/Mendenhall Collection/mwc00609 ID. Mendenhall, W.C. 609 Steel Scraper at work on Laguna Dam. Yuma County, Arizona. Summer, 1906. #1:/Mendenhall Collection/mwc00610 ID. Mendenhall, W.C. 610 Seventeen Palm Springs, Colorado Desert. San Diego County, California. 1905. #1:/Mendenhall Collection/mwc00611 ID. Mendenhall, W.C. 611 Near view of Seventeen Palm Springs, Colorado Desert. San Diego County, California. 1905. #1:/Mendenhall Collection/mwc00612 ID. Mendenhall, W.C. 612 Eroded Tertiary strata east of Seventeen Palm Springs, Colorado Desert. San Diego County, California. 1905. #1:/Mendenhall Collection/mwc00613 ID. Mendenhall, W.C. 613 Cliff cut in Tertiary Shales along shore of the ancient Lake Cahuilla, near Clay Point. Imerial County, California. 1905. #1:/Mendenhall Collection/mwc00614 ID. Mendenhall, W.C. 614 Desert Homestead near Coachella, Colorado Desert. Riverside County, California. 1905. #1:/Mendenhall Collection/mwc00615 ID. Mendenhall, W.C. 615 Flowing well near Coachella, Colorado Desert. Riverside County, California. 1905. #1:/Mendenhall Collection/mwc00616 ID. Mendenhall, W.C. 616 Sand drifting across desert road, north of Indio. Riverside County, California. 1905. #1:/Mendenhall Collection/mwc00617 ID. Mendenhall, W.C. 617 Sand Dunes near Indian Well. Colorado Desert. Riverside County, California. 1905. #1:/Mendenhall Collection/mwc00618 ID. Mendenhall, W.C. 618 Panorama with photo mwc00619. Desert reservoir strength ended by growth of young Cottonwoods. Riverside County, California. 1905. #1:/Mendenhall Collection/mwc00619 ID. Mendenhall, W.C. 619 Panorama with photo mwc00618. Desert reservoir strength ended by growth of young Cottonwoods. Riverside County, California. 1905. #1:/Mendenhall Collection/mwc00620 ID. Mendenhall, W.C. 620 Road near Indio, Colorado Desert. Cottonwoods are 3 to 4 years old. Riverside County, California. 1905. #1:/Mendenhall Collection/mwc00621 ID. Mendenhall, W.C. 621 Growth of Ocatilla on desert east of Mecca. Riverside County, California. 1905. #1:/Mendenhall Collection/mwc00622 ID. Mendenhall, W.C. 622 Lagoon of mineralized waters at base of Cerro Prieto Mountains. Baja California. Mexico. 1905. #1:/Mendenhall Collection/mwc00623 ID. Mendenhall, W.C. 623 Summit of Cerro Prieto Mountains. Baja California. Mexico. 1905. #1:/Mendenhall Collection/mwc00624 ID. Mendenhall, W.C. 624 Panorama with photos mwc00625 and mwc00626. Depression, locally known as the Crater, in summit of Cerro Prieto. Baja California. Mexico. 1905. #1:/Mendenhall Collection/mwc00625 ID. Mendenhall, W.C. 625 Panorama with photos mwc00624 and mwc00626. Depression, locally known as the Crater, in summit of Cerro Prieto. Baja California. Mexico. 1905. #1:/Mendenhall Collection/mwc00626 ID. Mendenhall, W.C. 626 Panorama with photos mwc00624 and mwc00625. Depression, locally known as the Crater, in summit of Cerro Prieto. Baja California. Mexico. 1905. #1:/Mendenhall Collection/mwc00627 ID. Mendenhall, W.C. 627 Shores of Volcano Lake near Cerro Prieto. Baja California. Mexico. 1905. #1:/Mendenhall Collection/mwc00628 ID. Mendenhall, W.C. 628 Distant view of shores of Volcano Lake near Cerro Prieto showing group of Mud Volcanoes. Baja California. Mexico. 1905. #1:/Mendenhall Collection/mwc00629 ID. Mendenhall, W.C. 629 A group of Mud Volcanoes near shores of Volcano Lake. Baja California. Mexico. 1905. #1:/Mendenhall Collection/mwc00630 ID. Mendenhall, W.C. 630 Collapsed Mud Volcano near Volcano Lake. Baja California. Mexico. 1905. #1:/Mendenhall Collection/mwc00631 ID. Mendenhall, W.C. 631 Mud Cone near shores of Volcano Lake. Baja California. Mexico. 1905. #1:/Mendenhall Collection/mwc00632 ID. Mendenhall, W.C. 632 High banks of Volcano Lake, built up by material discharged by Mud Volcanoes. Baja California. Mexico. 1905. #1:/Mendenhall Collection/mwc00633 ID. Mendenhall, W.C. 633 Bursting mud bubble, Mud Volcanoes. Baja California. Mexico. 1905. #1:/Mendenhall Collection/mwc00634 ID. Mendenhall, W.C. 634 Seventeen Palm Springs, Colorado Desert. San Diego County, California. 1905. #1:/Mendenhall Collection/mwc00635 ID. Mendenhall, W.C. 635 Outcrops of Tertiary clay beds near Seventeen Palm Springs, Colorado Desert. San Diego County, California. 1905. #1:/Mendenhall Collection/mwc00636 ID. Mendenhall, W.C. 636 Gorge in consolidated Tertiary Alluvium. Red Canyon, 5 miles east of Mecca. Colorado Desert. San Diego County, California. 1905. #1:/Mendenhall Collection/mwc00637 ID. Mendenhall, W.C. 637 Calcareous incrustations on Granitic Rocks at Old Water Line west of Indio. Riverside County, California. 1905. #1:/Mendenhall Collection/mwc00638 ID. Mendenhall, W.C. 638 Beach of Lake Cahuilla in cove west of El Toro. Imperial County, California. 1905. #1:/Mendenhall Collection/mwc00639 ID. Mendenhall, W.C. 639 Embankment marking shore line of Lake Cahuilla, east of Imperial Junction, Colorado Desert. Imperial County, California. 1905. #1:/Mendenhall Collection/mwc00640 ID. Mendenhall, W.C. 640 Group of Mud Volcanoes, now submerged beneath Salton Sea. 6 miles northwest of Imperial Junction. Imperial County, California. 1905. #1:/Mendenhall Collection/mwc00641 ID. Mendenhall, W.C. 641 Steam vent in Mud Volcanoes, northwest of Imperial Junction. Imperial County, California. 1905. #1:/Mendenhall Collection/mwc00642 ID. Mendenhall, W.C. 642 Detail of Mud Cones, northwest of Imperial Junction. Imperial County, California. 1905. #1:/Mendenhall Collection/mwc00643 ID. Mendenhall, W.C. 643 Boiling Mud Springs, northwest of Imperial Junction. Imperial County, California. 1905. #1:/Mendenhall Collection/mwc00644 ID. Mendenhall, W.C. 644 Mud Volcanoes and acidulated ponds, northwest of Imperial Junction. Imperial County, California. 1905. #1:/Mendenhall Collection/mwc00645 ID. Mendenhall, W.C. 645 Base of telegraph pole partially cut away by windblown sand near Palm Springs Station. Coloado Desert. Riverside County, California. 1905. #1:/Mendenhall Collection/mwc00646 ID. Mendenhall, W.C. 646 Detail of sand blast erosion on telegraph pole near Palm Springs Station. Coloado Desert. Riverside County, California. 1905. #1:/Mendenhall Collection/mwc00647 ID. Mendenhall, W.C. 647 Knots in telegraph pole thrown into relief by sand blast erosion near Palm Springs Station, Coloado Desert. Riverside County, California. 1905. #1:/Mendenhall Collection/mwc00648 ID. Mendenhall, W.C. 648 Erosion of schist boulder by sand blast, near Palm Springs Station, Colorado Desert. Riverside County, California. 1905. #1:/Mendenhall Collection/mwc00649 ID. Mendenhall, W.C. 649 Pitting surface of schist boulder by sand blast near Palm Springs Station, Colorado Desert. Riverside County, California. 1905. #1:/Mendenhall Collection/mwc00650 ID. Mendenhall, W.C. 650 Hog Wallows on Mesa back of San Diego. San Diego County, California. 1905. #1:/Mendenhall Collection/mwc00651 ID. Mendenhall, W.C. 651 Hog Wallows on Mesa back of San Diego. San Diego County, California. 1905. #1:/Mendenhall Collection/mwc00652 ID. Mendenhall, W.C. 652 Fault line at base of Claremont, northeast of San Jacinto. Riverside County, California. 1905. #1:/Mendenhall Collection/mwc00653 ID. Mendenhall, W.C. 653 Contact of mountain and valley slopes along fault line, northeast of San Jacinto. Riverside County, California. 1905. #1:/Mendenhall Collection/mwc00654 ID. Mendenhall, W.C. 654 Fault line at base of San Jacinto Range, southeast of San Jacinto. Riverside County, California. 1905. #1:/Mendenhall Collection/mwc00655 ID. Mendenhall, W.C. 655 Alluvial Terraces Indian Creek Valley, southeast of San Jacinto. Riverside County, California. 1905. #1:/Mendenhall Collection/mwc00656 ID. Mendenhall, W.C. 656 Desert vegetation near Lytle Creek Wash, San Bernardino Valley. Riverside County, California. 1905. #1:/Mendenhall Collection/mwc00657 ID. Mendenhall, W.C. 657 Character of timer cover, southern crest of San Bernardino Mountains. On Bear Valley. San Bernardino County, California. 1905. #1:/Mendenhall Collection/mwc00658 ID. Mendenhall, W.C. 658 Concentric weathering in granite, Box Springs Road. Riverside County, California. 1905. #1:/Mendenhall Collection/mwc00659 ID. Mendenhall, W.C. 659 Open glade Holcomb Valley, San Bernardino Mountains. Riverside County, California. 1905. #1:/Mendenhall Collection/mwc00660 ID. Mendenhall, W.C. 660 Character of forest cover Holcomb Valley, San Bernardino Mountains. Riverside County, California. 1905. #1:/Mendenhall Collection/mwc00661 ID. Mendenhall, W.C. 661 Growth of yellow pine on level floor of Holcomb Valley, San Bernardino Mountains. Riverside County, California. 1905. #1:/Mendenhall Collection/mwc00662 ID. Mendenhall, W.C. 662 Eastern end of Holcomb Valley, San Bernardino Mountains Riverside County, California. 1905. #1:/Mendenhall Collection/mwc00663 ID. Mendenhall, W.C. 663 Rose Mine. San Bernardino Mountains Riverside County, California. 1905. #1:/Mendenhall Collection/mwc00664 ID. Mendenhall, W.C. 664 East slope of San Antonio Peak, San Antonio Mountains. Riverside County, California. 1905. #1:/Mendenhall Collection/mwc00665 ID. Mendenhall, W.C. 665 Young Orange groves planted on terraced hillsides, West Riverside. Riverside County, California. 1905. #1:/Mendenhall Collection/mwc00666 ID. Mendenhall, W.C. 666 Division Box, Santa Ana Canal System. Orange County, California. 1905. #1:/Mendenhall Collection/mwc00667 ID. Mendenhall, W.C. 667 Flowing well on Antill Tract, San Bernardino Valley. San Bernardino County, California. 1905. #1:/Mendenhall Collection/mwc00668 ID. Mendenhall, W.C. 668 Bixby Artesian Well. Downey Quad. Los Angeles, California. 1904. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00669 ID. Mendenhall, W.C. 669 San Francisco, California, Earthquake April 18, 1906. Refugees on Jefferson Square at Earthquake. San Francisoco. San Francisco County, California. April 1906. #1:/Mendenhall Collection/mwc00670 ID. Mendenhall, W.C. 670 Forms of weathered granite in the Alabama Hills, Owens Valley. Inyo County, California. 1905. #1:/Mendenhall Collection/mwc00671 ID. Mendenhall, W.C. 671 Forms of weathered granite in the Alabama Hills, Owens Valley. Inyo County, California. 1905. #1:/Mendenhall Collection/mwc00672 ID. Mendenhall, W.C. 672 Boulders of disintegration, Alabama Hills, Owens Valley. Inyo County, California. 1905. #1:/Mendenhall Collection/mwc00673 ID. Mendenhall, W.C. 673 View from summit of Cirque Peak, eastward over the valley of Cottonwood Creek. Sierra Nevada Mountains. Inyo County, California. 1905. #1:/Mendenhall Collection/mwc00674 ID. Mendenhall, W.C. 674 View towards Owen Lake from Cottonwood Trail. Sierra Nevada Mountains. Inyo County, California. 1905. #1:/Mendenhall Collection/mwc00675 ID. Mendenhall, W.C. 675 View towards Owen Lake from Cottonwood Trail. Sierra Nevada Mountains. Inyo County, California. 1905. #1:/Mendenhall Collection/mwc00676 ID. Mendenhall, W.C. 676 Old Mill at lower end of Cottonwood Meadows, Sierra Navada Mountains. Inyo County, California. 1905. #1:/Mendenhall Collection/mwc00677 ID. Mendenhall, W.C. 677 Summit of Cirque Peak, Sierra Navada Mountains. Inyo County, California. 1905. #1:/Mendenhall Collection/mwc00678 ID. Mendenhall, W.C. 678 Summit of Cirque Peak, Sierra Navada Mountains. Inyo County, California. 1905. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00679 ID. Mendenhall, W.C. 679 San Francisco, California, Earthquake April 18, 1906. The City of San Francisco burning as seen from the Oakland Ferry, morning of April 20, 1906. San Francsico County, California. April 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00680 ID. Mendenhall, W.C. 680 San Francisco, California, Earthquake April 18, 1906. View east from Jones Street and Golden Gate Ave., showing results of fire. April 20, 1906. San Francsico County, California. April 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00681 ID. Mendenhall, W.C. 681 San Francisco, California, Earthquake April 18, 1906. View south from 4th and Market streets, showing results of fire. April 20, 1906. San Francsico County, California. April 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00682 ID. Mendenhall, W.C. 682 San Francisco, California, Earthquake April 18, 1906. Corner of Steward Street and Market Street, showing fire-wrecked buildings. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00683 ID. Mendenhall, W.C. 683 San Francisco, California, Earthquake April 18, 1906. Call Building and other buildings. April 20, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00684 ID. Mendenhall, W.C. 684 San Francisco, California, Earthquake April 18, 1906. View is southwest from corner of Geary Street and Mason Street. April 20, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00685 ID. Mendenhall, W.C. 685 San Francisco, California, Earthquake April 18, 1906. Knob Hill after the earthquake, viewed from the corner of Van Ness Street and Washington Street. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00686 ID. Mendenhall, W.C. 686 San Francisco, California, Earthquake April 18, 1906. Baggage salvaged from the St. Francis Hotel. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00687 ID. Mendenhall, W.C. 687 San Francisco, California, Earthquake April 18, 1906. View Northwest from corner of Fourth and Market streets. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00688 ID. Mendenhall, W.C. 688 San Francisco, California, Earthquake April 18, 1906. Fire-wrecked interior of the Blue and Gold Room of the St. Francis Hotel. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00690 ID. Mendenhall, W.C. 690 San Francisco, California, Earthquake April 18, 1906. Corner of Sacramento and Market Streets. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00691 ID. Mendenhall, W.C. 691 San Francisco, California, Earthquake April 18, 1906. Refugee camp at Jefferson Square. April 20, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00692 ID. Mendenhall, W.C. 692 San Francisco, California, Earthquake April 18, 1906. Phelan Building. April 20, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00693 ID. Mendenhall, W.C. 693 San Francisco, California, Earthquake April 18, 1906. Sunken area on Market Street near Ferry building. April 20, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00694 ID. Mendenhall, W.C. 694 San Francisco, California, Earthquake April 18, 1906. Interior of the earthquake- and fire-wrecked building at the corner of Taylor Street and Geary Street. April 20, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00695 ID. Mendenhall, W.C. 695 San Francisco, California, Earthquake April 18, 1906. Earthquake- and fire- wrecked Fairmont Hotel. April 20, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00696 ID. Mendenhall, W.C. 696 San Francisco, California, Earthquake April 18, 1906. Donahue Monument, corner Bush and Battery Streets. April 20, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00697 ID. Mendenhall, W.C. 697 San Francisco, California, Earthquake April 18, 1906. Earthquake- and fire- wrecked buildings at Market Street and Tenth. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00698 ID. Mendenhall, W.C. 698 San Francisco, California, Earthquake April 18, 1906. Earthquake- and fire- wrecked buildings, looking down Montgomery Street from the corner of Market Street. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00699 ID. Mendenhall, W.C. 699 San Francisco, California, Earthquake April 18, 1906. Hibernia Bank Building. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00700 ID. Mendenhall, W.C. 700 San Francisco, California, Earthquake April 18, 1906. Earthquake-wrecked City Hall. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00701 ID. Mendenhall, W.C. 701 San Francisco, California, Earthquake April 18, 1906. Palace Hotel and Call Building. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00702 ID. Mendenhall, W.C. 702 San Francisco, California, Earthquake April 18, 1906. St. Francis Hotel after the fire. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00703 ID. Mendenhall, W.C. 703 San Francisco, California, Earthquake April 18, 1906. Rescued baggage in front of St. Francis Hotel. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00704 ID. Mendenhall, W.C. 704 San Francisco, California, Earthquake April 18, 1906. Refugees Camp, Jefferson Square. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00705 ID. Mendenhall, W.C. 705 San Francisco, California, Earthquake April 18, 1906. Looting a cash register and destroyed buildings at corner of 4th and Market Streets. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00706 ID. Mendenhall, W.C. 706 San Francisco, California, Earthquake April 18, 1906. N.E. from the corner of 4th and Market Streets. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00707 ID. Mendenhall, W.C. 707 San Francisco, California, Earthquake April 18, 1906. City Hall. April 20, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00708 ID. Mendenhall, W.C. 708 San Francisco, California, Earthquake April 18, 1906. N.W. from corner of Market and Decker Streets. April 20, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00709 ID. Mendenhall, W.C. 709 San Francisco, California, Earthquake April 18, 1906. Wrecked store on University Avenue in Palo Alto. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00710 ID. Mendenhall, W.C. 710 San Francisco, California, Earthquake April 18, 1906. Wrecked house built of concrete floors on University Avenue in Palo Alto. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00711 ID. Mendenhall, W.C. 711 San Francisco, California, Earthquake April 18, 1906. Wrecked building one block north of University Avenue in Palo Alto. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00712 ID. Mendenhall, W.C. 712 San Francisco, California, Earthquake April 18, 1906. Wreckage at the entrance to Stanford University in Palo Alto. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00713 ID. Mendenhall, W.C. 713 San Francisco, California, Earthquake April 18, 1906. Stanford University Library, viewed from the gymnasium side. April 21, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00714 ID. Mendenhall, W.C. 714 San Francisco, California, Earthquake April 18, 1906. Stanford University Library on the right. Gymnasium in the distant background. April 21, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00715 ID. Mendenhall, W.C. 715 San Francisco, California, Earthquake April 18, 1906. Agassiz statue at Stanford University. April 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00716 ID. Mendenhall, W.C. 716 San Francisco, California, Earthquake April 18, 1906. Rear of the Great Arch and overturned urns on the Stanford University campus. April 21, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00717 ID. Mendenhall, W.C. 717 San Francisco, California, Earthquake April 18, 1906. Great Arch at Stanford University. April 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00718 ID. Mendenhall, W.C. 718 San Francisco, California, Earthquake April 18, 1906. Collapsed corridor at Stanford University Chapel, viewed from the rear. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00719 ID. Mendenhall, W.C. 719 San Francisco, California, Earthquake April 18, 1906. Wrecked east wing of the museum at Stanford University. 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00720 ID. Mendenhall, W.C. 720 San Francisco, California, Earthquake April 18, 1906. Gymnasium and library (in the background) at Stanford University. April 21, l906. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00721 ID. Mendenhall, W.C. 721 San Francisco, California, Earthquake April 18, 1906. Gymnasium at Stanford University. April 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mwc00722 ID. Mendenhall, W.C. 722 San Francisco, California, Earthquake April 18, 1906. Stanford University Chapel, viewed from the inner quadrangle. 1906. #1:/Mendenhall Collection/mwc00723 ID. Mendenhall, W.C. 723 San Luis Rey Mission. San Diego County, California. ca 1905. #1:/Mendenhall Collection/mwc00724 ID. Mendenhall, W.C. 724 A view of Cretaceous Rocks and of the underlying upper portion of the Red Bed Series as exposed at Blue Canyon in the Moencopie Wash, 18 miles east of Tuba. Coconino County, Arizona. 1910. #1:/Mendenhall Collection/mwc00725 ID. Mendenhall, W.C. 725 A view of Cretaceous Rocks and of the underlying upper portion of the Red Bed Series as exposed at Blue Canyon in the Moencopie Wash, 18 miles east of Tuba. Coconino County, Arizona. 1910. #1:/Mendenhall Collection/mwc00726 ID. Mendenhall, W.C. 726 Central portion of exposure of top of Red Beds and overlying Cretaceous at Blue Canyon. Coconino County, Arizona. 1910. #1:/Mendenhall Collection/mwc00727 ID. Mendenhall, W.C. 727 Central portion of exposure of top of Red Beds and overlying Cretaceous at Blue Canyon. Coconino County, Arizona. 1910. #1:/Arizona-Professional paper 93/mwc00728 ID. Mendenhall, W.C. 728 Blue Canyon, local peneplain developed at two levels on beveled edges of McElmo Formation. Coconino County, Arizona. Circa 1910. Plate 24 in U.S. Geological Survey. Professional paper 93. 1917. #1:/Canyon de Chelly National Monument/mwc00729 ID. Mendenhall, W.C. 729 Canyon de Chelly National Monument, Arizona. Down Canyon de Chelly, viewed from the mouth of Monument Canyon. Circa 1910. #1:/Canyon de Chelly National Monument/mwc00730 ID. Mendenhall, W.C. 730 Canyon de Chelly National Monument, Arizona. The Captains from the west. Apache County, Arizona. ca 1910. #1:/Canyon de Chelly National Monument/mwc00731 ID. Mendenhall, W.C. 731 Canyon de Chelly National Monument, Arizona. Down Canyon de Chelly, viewed from the mouth of the canyon. The Captains on the right. Circa 1910. #1:/Canyon de Chelly National Monument/mwc00732 ID. Mendenhall, W.C. 732 Canyon de Chelly National Monument, Arizona. Down Canyon de Chelly, viewed from a point 2 or 3 miles below Monument Canyon. Circa 1910. #1:/Canyon de Chelly National Monument/mwc00733 ID. Mendenhall, W.C. 733 Canyon de Chelly National Monument, Arizona. Up Canyon de Chelly, viewed from a point 4 or 5 miles below the mouth of Monument Canyon. Circa 1910. #1:/Canyon de Chelly National Monument/mwc00734 ID. Mendenhall, W.C. 734 Canyon de Chelly National Monument, Arizona. North wall of Canyon de Chelly at a point midway between Canyon del Muerto and Monument Canyon. Circa 1910. Plate 9-A, U.S. Geological Survey Water-Supply Paper 380; Plate 7, U.S. Geological Survey Professional Paper 93. #1:/Canyon de Chelly National Monument/mwc00735 ID. Mendenhall, W.C. 735 Canyon de Chelly National Monument, Arizona. South wall of Canyon de Chelly at a point 1 mile above the White House. Circa 1910. #1:/Canyon de Chelly National Monument/mwc00736 ID. Mendenhall, W.C. 736 Canyon de Chelly National Monument, Arizona. Cliff dwelling and its setting at the junction of Canyon de Chelly and Canyon del Muerto. Circa 1910. Plate 9-B, U.S. Geological Survey Water-Supply Paper 380. #1:/Canyon de Chelly National Monument/mwc00737 ID. Mendenhall, W.C. 737 Canyon de Chelly National Monument, Arizona. View in Canyon Del Muerto 2 miles above its mouth Apache County, Arizona. 1910. #1:/Canyon de Chelly National Monument/mwc00738 ID. Mendenhall, W.C. 738 Canyon de Chelly National Monument, Arizona. View of Grand Falls on the Little Coloado River from below. Coconino County, Arizona. 1910. #1:/Canyon de Chelly National Monument/mwc00739 ID. Mendenhall, W.C. 739 Canyon de Chelly National Monument, Arizona. The Captains, viewed from the west. Coconino County, Arizona. 1910. #1:/Canyon de Chelly National Monument/mwc00740 ID. Mendenhall, W.C. 740 Canyon de Chelly National Monument, Arizona. Looking down the canyon of the Little Colorado River from above Grand Falls. Coconino County, Arizona. 1910. #1:/Mendenhall Collection/mwc00741 ID. Mendenhall, W.C. 741 General view of the Hopi Indian Villages of Shipauiluvi and Mishonginivi on the Second Mesa. Apache County, Arizona. 1910. #1:/Mendenhall Collection/mwc00742 ID. Mendenhall, W.C. 742 View of the Hopi Indian Village of Oraibi looking from the south. Navajo County, Arizona. 1910. #1:/Mendenhall Collection/mwc00743 ID. Mendenhall, W.C. 743 Kealia Mill and Village. Kauai County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00744 ID. Mendenhall, W.C. 744 Kealie Lands. Kauai County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00745 ID. Mendenhall, W.C. 745 Kalihiwai Bay and Valley. Kauai County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00746 ID. Mendenhall, W.C. 746 View east along coast of Kauai from just east of Lunahai River. Kauai County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00747 ID. Mendenhall, W.C. 747 View west from Makehoa Point. Kauai County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00748 ID. Mendenhall, W.C. 748 Stocking the Larder, Haeina, Kauai. Kauai County, Hawaii. August 22, 1909. #1:/Mendenhall Collection/mwc00749 ID. Mendenhall, W.C. 749 Ka Leina Ka Uila. Kauai County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00750 ID. Mendenhall, W.C. 750 View west along the windward coast of Kauai from just west of Haena. Kauai County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00751 ID. Mendenhall, W.C. 751 Overhanging base of Pali, just west of Hanakapiae, Kauai. Kauai County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00752 ID. Mendenhall, W.C. 752 View east along the windward coast of Kauai two miles east of Kalalau. Kauai County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00753 ID. Mendenhall, W.C. 753 View west along the Pali Coast of Kauai from one mile east of Kalalau. Kauai County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00754 ID. Mendenhall, W.C. 754 Discussion possibilities, Kalalau, Kauai. Kauai County, Hawaii. August 24, 1909. #1:/Mendenhall Collection/mwc00755 ID. Mendenhall, W.C. 755 Preparing to venure into water at Kalalau. Kauai County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00756 ID. Mendenhall, W.C. 756 Preparing to venure into water at Kalalau. Awaiting a favorable moment. Kauai County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00757 ID. Mendenhall, W.C. 757 Venuring into water at Kalalau. Kauai County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00758 ID. Mendenhall, W.C. 758 Boat returning for the second load at Kalalau. Kauai County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00759 ID. Mendenhall, W.C. 759 View east across Kalalau Gulch, from point on ridge between Kalalau and Honapu, elevation about 3,000 feet. Kauai County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00760 ID. Mendenhall, W.C. 760 Na Pali Coast of Kauai from above the mouth of Hopapu. Kauai County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00761 ID. Mendenhall, W.C. 761 Topographic detail in head of lower Milolii Gulch. Kauai County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00762 ID. Mendenhall, W.C. 762 Upper part of Milolii Drainage Basin. Kauai County, Hawaii. August 25, 1909. #1:/Mendenhall Collection/mwc00763 ID. Mendenhall, W.C. 763 Bracken and Koa, higher Semi Humid Kauai on trail Milolii to Hale Manu. Kauai County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00764 ID. Mendenhall, W.C. 764 Group on hourseback at Halemanu. Kauai County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00765 ID. Mendenhall, W.C. 765 View of Hanapepe Valley, from near Eleele. Kauai County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00766 ID. Mendenhall, W.C. 766 Lower Hanapepe Valley and Bay. Kauai County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00767 ID. Mendenhall, W.C. 767 Detain in west wall Waimea Canyon, Kauai, just below Malemanu. Kauai County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00768 ID. Mendenhall, W.C. 768 View northward across Huleia Valley from Kipu Kai Pass. Kauai County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00769 ID. Mendenhall, W.C. 769 The breaker Breaketh, Kipu Kai, Kauai, Arthur Rice fishing for Moa. Kauai County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00770 ID. Mendenhall, W.C. 770 The breaker Passeth, Kipu Kai. Arthur Rice fishing for Moa. Kauai County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00771 ID. Mendenhall, W.C. 771 Arthur Rice casting the net. Kipu Kai. Kauai County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00772 ID. Mendenhall, W.C. 772 Arthur Rice following the cast of the net. Kipu Kai. Kauai County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00773 ID. Mendenhall, W.C. 773 Arthur Rice returning after the cast of the net. Kipu Kai. Kauai County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00774 ID. Mendenhall, W.C. 774 Men on horseback following the Kipu Kai trail. Kauai County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00775 ID. Mendenhall, W.C. 775 Crossbedding, erosion and solution in consolidated sand dunes, Kipu Kai. Kauai County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00776 ID. Mendenhall, W.C. 776 Makapuu Light, Oahu. Honolulu County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00777 ID. Mendenhall, W.C. 777 Lavas of Kaimuki Crater, near Diamond Head, Oahu. Honolulu County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00778 ID. Mendenhall, W.C. 778 Diamond Head and surf boating from Waikiki Pier, Oahu. Honolulu County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00779 ID. Mendenhall, W.C. 779 Banana Plantation, Waikiki, Oahu. Honolulu County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00780 ID. Mendenhall, W.C. 780 Feed Ditch, laborers houses, flooded rice checks, Waikiki, Oahu. Honolulu County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00781 ID. Mendenhall, W.C. 781 Preparing ground for rice culture, Waikiki, Oahu. Honolulu County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00782 ID. Mendenhall, W.C. 782 Rice fields and farm buildings, Waikiki, Oahu. Honolulu County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00783 ID. Mendenhall, W.C. 783 Rice Farm at Waikiki, Oahu. Honolulu County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00784 ID. Mendenhall, W.C. 784 Mr. and Mrs. Leighton on hourseback on the Tantalus Road near Nahelehau. Honolulu County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00785 ID. Mendenhall, W.C. 785 Pauoa Valley from the slopes of Punchbowl, Oahu. Honolulu County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00786 ID. Mendenhall, W.C. 786 Hauling wood in Kalihi Valley, Oahu. Honolulu County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00787 ID. Mendenhall, W.C. 787 Hillside gardening without irrigation, Kalihi Valley, Oahu. Honolulu County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00788 ID. Mendenhall, W.C. 788 Taro cultivation near the mouth of Kalihi Valley, Oahu. Honolulu County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00789 ID. Mendenhall, W.C. 789 Ash from salt lake craters, overlying stream gravels near Schofield Baracks, Oahu. Honolulu County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00790 ID. Mendenhall, W.C. 790 Ash from Salt Lake Craters, overlying stream gravels near Schofield Baracks, Oahu. Honolulu County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00791 ID. Mendenhall, W.C. 791 The Makai slope of Salt Lake Crater, Oahu. Honolulu County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00792 ID. Mendenhall, W.C. 792 Salt Lake and the Salt Lake Points, Oahu. Honolulu County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00793 ID. Mendenhall, W.C. 793 Ash from Salt Lake Craters, overlying old soil surface on south edge of Halawa Valley. Oahu. Honolulu County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00794 ID. Mendenhall, W.C. 794 Stratified Ash between Puuloa and Aiea. Oahu. Honolulu County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00795 ID. Mendenhall, W.C. 795 Gravel and soil between two ash beds of the Salt Lake at Aiea Stat., Oahu. Honolulu County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00796 ID. Mendenhall, W.C. 796 Water laid soil and cobble beds, 1/4 mile northwest of Aiea Stat., Oahu. Honolulu County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00797 ID. Mendenhall, W.C. 797 Water laid marl, lime and Oyster beds, east of Waipi, Oahu. Honolulu County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00798 ID. Mendenhall, W.C. 798 Group of pumping plants on Oahu Platation. Oahu. Honolulu County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00799 ID. Mendenhall, W.C. 799 Group of pumping plants on Oahu Platation, showing their situation in bottom of Waipahu Gulch. Oahu. Honolulu County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00800 ID. Mendenhall, W.C. 800 Elevated marine clays and gravels near Honoliuli, Oahu. Honolulu County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00801 ID. Mendenhall, W.C. 801 Flowing salt well at Puuloa, Oahu. Honolulu County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00802 ID. Mendenhall, W.C. 802 Salt Fields at Puuloa, Oahu. Honolulu County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00803 ID. Mendenhall, W.C. 803 Contact of Coral and Basalt near Browns Camp, Oahu. Honolulu County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00804 ID. Mendenhall, W.C. 804 Lagoon and Waialua agricultutal lands at base of Puu Paua, Oahu. Honolulu County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00805 ID. Mendenhall, W.C. 805 Estuary of Anahulu River at Haliewa, Oahu. Honolulu County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00806 ID. Mendenhall, W.C. 806 Lower course of Anahulu River at Haliewa, Oahu. Honolulu County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00807 ID. Mendenhall, W.C. 807 Low Corall Bluffs and Japanese Fishing Craft at Haleiwa, Oahu. Honolulu County, Hawaii. August 13, 1909. #1:/Mendenhall Collection/mwc00808 ID. Mendenhall, W.C. 808 Transplanting Rice, Kaneocho, Oahu. Honolulu County, Hawaii. August 13, 1909. #1:/Mendenhall Collection/mwc00809 ID. Mendenhall, W.C. 809 The landing at Nahiku, Maui. Maui County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00810 ID. Mendenhall, W.C. 810 Falls on the Wailuaiki, Maui. Maui County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00811 ID. Mendenhall, W.C. 811 Dead forest of Oahia Lehua, Ditch Trail, Maui. Maui County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00812 ID. Mendenhall, W.C. 812 Dead Ohia Trees, Ditch Trail, Maui. Maui County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00813 ID. Mendenhall, W.C. 813 Keanae, Maui, from the Coast Trail. Maui County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00814 ID. Mendenhall, W.C. 814 Ditch Trail, east side Keanae Canyon, Maui. Maui County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00815 ID. Mendenhall, W.C. 815 Undeveloped power from Ditch Water, Hono Mauu, Maui. Maui County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00816 ID. Mendenhall, W.C. 816 Lower Fall, Honomanu, Maui. Maui County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00817 ID. Mendenhall, W.C. 817 Upper Fall, Honomanu, Maui. Maui County, Hawaii. 1909. #1:/Mendenhall Collection/mwc00818 ID. Mendenhall, W.C. 818 Hamakua Kitch, one mile east of Pognes, Maui. Maui County, Hawaii. 1909. #1:/Haleakala National Park/mwc00819 ID. Mendenhall, W.C. 819 Haleakala National Park, Hawaii. Preparing breakfast adjacent to the shelter at Haleakala crater. 1909. #1:/Haleakala National Park/mwc00820 ID. Mendenhall, W.C. 820 Haleakala National Park, Hawaii. At breakfast adjacent to the shelter at Haleakala crater. 1909. #1:/Haleakala National Park/mwc00821 ID. Mendenhall, W.C. 821 Haleakala National Park, Hawaii. On the brink, Haleakala crater. 1909. #1:/Haleakala National Park/mwc00822 ID. Mendenhall, W.C. 822 Haleakala National Park, Hawaii. Rolling rocks into Haleakala crater. 1909. #1:/Haleakala National Park/mwc00823 ID. Mendenhall, W.C. 823 Haleakala National Park, Hawaii. Cinder cones in Haleakala crater. 1909. #1:/Haleakala National Park/mwc00824 ID. Mendenhall, W.C. 824 Haleakala National Park, Hawaii. Clouds flowing into Haleakala crater. 1909. #1:/Haleakala National Park/mwc00825 ID. Mendenhall, W.C. 825 Haleakala National Park, Hawaii. Clouds and craters. Haleakala crater. 1909. #1:/Haleakala National Park/mwc00826 ID. Mendenhall, W.C. 826 Haleakala National Park, Hawaii. Clouds below Haleakala crater. 1909. #1:/Haleakala National Park/mwc00827 ID. Mendenhall, W.C. 827 Haleakala National Park, Hawaii. Clouds and the Pacific from Haleakala crater. 1909. #1:/Haleakala National Park/mwc00828 ID. Mendenhall, W.C. 828 Haleakala National Park, Hawaii. Party getting ready to leave Haleakala shelter house. Hawaii. 1909. #1:/Haleakala National Park/mwc00829 ID. Mendenhall, W.C. 829 Haleakala National Park, Hawaii. Party starting down Haleakala crater. Hawaii. 1909. #1:/Haleakala National Park/mwc00830 ID. Mendenhall, W.C. 830 Haleakala National Park, Hawaii. Party descending the Olinda trail. Hawaii. 1909. #1:/Haleakala National Park/mwc00831 ID. Mendenhall, W.C. 831 Haleakala National Park, Hawaii. Mauna Kea and the Waimea Plains from the slopes of the Kohala Mountain. Hawaii Co. Hawaii. 1909. #1:/Haleakala National Park/mwc00832 ID. Mendenhall, W.C. 832 Haleakala National Park, Hawaii. Exploring the Kohala Ditch. Hawaii Co. Hawaii. 1909. #1:/Haleakala National Park/mwc00833 ID. Mendenhall, W.C. 833 Haleakala National Park, Hawaii. View down McCrossen Trail, across Waipio Bay to the Peninsula formed by the slide of 1908. Hawaii Co. Hawaii. 1909. #1:/Haleakala National Park/mwc00834 ID. Mendenhall, W.C. 834 Haleakala National Park, Hawaii. On the construction trail above Waipio Valley. Hawaii Co. Hawaii. 1909. #1:/Haleakala National Park/mwc00835 ID. Mendenhall, W.C. 835 Haleakala National Park, Hawaii. McCrossen and Campbell on the construction trail Waipio Canyon. Hawaii Co. Hawaii. 1909. #1:/Haleakala National Park/mwc00836 ID. Mendenhall, W.C. 836 Construction Trail near mouth of South Fork, Waipio Canyon. Hawaii. Hawaii Co. Hawaii. 1909. #1:/Haleakala National Park/mwc00837 ID. Mendenhall, W.C. 837 Wild Bananas, Ferns and Koa Trees, along Construction Trail, Waipio Canyon. Hawaii. Hawaii Co. Hawaii. 1909. #1:/Haleakala National Park/mwc00838 ID. Mendenhall, W.C. 838 Down Waipio Canyon from near mouth of South Fork, showing stripping. Hawaii Co. Hawaii. 1909. #1:/Haleakala National Park/mwc00839 ID. Mendenhall, W.C. 839 Powder Packtrain, Waipio Canyon. Hawaii Co. Hawaii. 1909. #1:/Haleakala National Park/mwc00840 ID. Mendenhall, W.C. 840 View up southern tributary of Waipio Canyon, Hawaii, from footbridge. Hawaii Co. Hawaii. 1909. #1:/Haleakala National Park/mwc00841 ID. Mendenhall, W.C. 841 View into west fork of Waipio Canyon. Hawaii Co. Hawaii. 1909. #1:/Haleakala National Park/mwc00842 ID. Mendenhall, W.C. 842 View west from head of Mc'Crossen Ditch. Hawaii Co. Hawaii. 1909. #1:/Haleakala National Park/mwc00843 ID. Mendenhall, W.C. 843 Upstream side of Weir at head of Mc'Crossen Ditch, Waipio Canyon Hawaii Co. Hawaii. 1909. #1:/Haleakala National Park/mwc00844 ID. Mendenhall, W.C. 844 Fern growth on the volcanic flow of 1881 above Hilo. Hawaii Co. Hawaii. 1909. #1:/Hawaii Volcanoes National Park/mwc00845 ID. Mendenhall, W.C. 845 Hawaii Volcanoes National Park. A tree fern. Volcano Road. Hawaii County. Hawaii. 1909. #1:/Hawaii Volcanoes National Park/mwc00846 ID. Mendenhall, W.C. 846 Hawaii Volcanoes National Park. Spatter cone near Halemaumau Crater. 1909. Hawaii County. Hawaii. 1909. #1:/Hawaii Volcanoes National Park/mwc00847 ID. Mendenhall, W.C. 847 Hawaii Volcanoes National Park. Spatter cone near Halemaumau Crater. 1909. Hawaii County. Hawaii. 1909. #1:/Hawaii Volcanoes National Park/mwc00848 ID. Mendenhall, W.C. 848 Hawaii Volcanoes National Park. Lava cascades on Kilauea Volcano. 1909. Hawaii County, Hawaii. 1909. #1:/Hawaii Volcanoes National Park/mwc00849 ID. Mendenhall, W.C. 849 Hawaii Volcanoes National Park. Part of west wall, Halemaumau, Hawaii. Hawaii County, Hawaii. Sept. 1909. #1:/Hawaii Volcanoes National Park/mwc00850 ID. Mendenhall, W.C. 850 Hawaii Volcanoes National Park. Part of east wall, Halemaumau, Hawaii. Hawaii County, Hawaii. Sept. 6, 1909. #1:/Hawaii Volcanoes National Park/mwc00851 ID. Mendenhall, W.C. 851 Hawaii Volcanoes National Park. Part of south and west walls, Halemaumau. Hawaii County, Hawaii. Sept. 6, 1909. #1:/Hawaii Volcanoes National Park/mwc00852 ID. Mendenhall, W.C. 852 Hawaii Volcanoes National Park. West wall of Halemaumau Crater with old faithful in action. Hawaii County, Hawaii. Sept. 6, 1909. #1:/Hawaii Volcanoes National Park/mwc00853 ID. Mendenhall, W.C. 853 Hawaii Volcanoes National Park. Halemaumau at night.. Hawaii County, Hawaii. Sept. 5, 1909. #1:/Hawaii Volcanoes National Park/mwc00854 ID. Mendenhall, W.C. 854 Hawaii Volcanoes National Park. Pahoehoe lava, crater of Kilauea, Hawaii. Hawaii Co. Hawaii. 1909. #1:/Hawaii Volcanoes National Park/mwc00855 ID. Mendenhall, W.C. 855 Hawaii Volcanoes National Park. Puka entrance to a lava tunnel in Kilauea near Halemaumau Crater. #1:/Mendenhall Collection/mwc00856 ID. Mendenhall, W.C. 856 An involuntary bath, before the Cattle are loaded onto a Steamer. Kailua. Hawaii County, Hawaii. ca 1910. #1:/Mendenhall Collection/mwc00857 ID. Mendenhall, W.C. 857 Loading Cattle, Kailua. Hawaii County, Hawaii. ca 1910. #1:/Mendenhall Collection/mwc00858 ID. Mendenhall, W.C. 858 A boatload of Cattle, Kailua. Hawaii County, Hawaii. ca 1910. #1:/Mendenhall Collection/mwc00859 ID. Mendenhall, W.C. 859 Hauling cattle to the Mauna Kea by Cable, Kailua. A boatload of Cattle, Kailua. Hawaii County, Hawaii. ca 1910. #1:/Mendenhall Collection/mwc00860 ID. Mendenhall, W.C. 860 Taking an automobile to the Steamer, Kailua. Hawaii County, Hawaii. ca 1910. #1:/Mendenhall Collection/mwc00861 ID. Mendenhall, W.C. 861 Placing supports for the concrete cover of the Los Angeles Aqueduct east to Mohave, Ca. Kern Co., California, January 1910. #1:/Mendenhall Collection/mwc00862 ID. Mendenhall, W.C. 862 Section of the Los Angeles Aqueduct east of Mohave, California. The upper figure is the Los Angeles Aqueduct Engineer Mulholland. Kern County, California, January 1910. #1:/Mendenhall Collection/mwc00863 ID. Mendenhall, W.C. 863 Bucket of hydraulic dredge breaking ice in the Los Angeles Aqueduct, Owens Valley, Jan. 1910. Inyo County, California, January 1910. #1:/Mendenhall Collection/mwc00864 ID. Mendenhall, W.C. 864 Flowing well belonging to the City of Los Angeles near Independence, Owens Valley. Inyo County, California. 1910. #1:/Mendenhall Collection/mwc00865 ID. Mendenhall, W.C. 865 Aquduct Officials, etc., inspecting lands belonging to the City of Los Angeles. Owens Valley Inyo County, California. 1910. #1:/Mendenhall Collection/mwc00866 ID. Mendenhall, W.C. 866 Aquduct Officials, etc., inspecting lands belonging to the City of Los Angeles. Owens Valley Inyo County, California. 1910. #1:/Mendenhall Collection/mwc00867 ID. Mendenhall, W.C. 867 Shifting the electrical connections of the citys hydraulic dredge, Los Angeles Aqueduct. Owens Valley. Inyo County, California. January 1910. #1:/Mendenhall Collection/mwc00868 ID. Mendenhall, W.C. 868 Shifting the electrical connections of the citys hydraulic dredge, Los Angeles Aqueduct. Owens Valley. Inyo County, California. January 1910. #1:/Mendenhall Collection/mwc00869 ID. Mendenhall, W.C. 869 Dredge of the City of Los Angeles frozen into the Aqueduct. Inyo County, California. January 1910. #1:/Mendenhall Collection/mwc00870 ID. Mendenhall, W.C. 870 Bridge across Pecos River near Grandfalls, outcrop of Jurassic Sediments in river. Ward County, Texas. 1910. #1:/Mendenhall Collection/mwc00871 ID. Mendenhall, W.C. 871 General view of Pecos Rivernear Grandfalls. Jurassic sediment or alluvial banks on left. Ward County, Texas. 1910. #1:/Mendenhall Collection/mwc00872 ID. Mendenhall, W.C. 872 Downstream face of Brush Dam across Pecos River above Grandfalls. Ward County, Texas. 1910. #1:/Mendenhall Collection/mwc00873 ID. Mendenhall, W.C. 873 Downstream face of Brush Dam across Pecos River above Grandfalls. Ward County, Texas. 1910. #1:/Mendenhall Collection/mwc00874 ID. Mendenhall, W.C. 874 Mining Engineers inspecting oil sands, Kern Field. Kern County, California. October 1910. #1:/Mendenhall Collection/mwc00875 ID. Mendenhall, W.C. 875 Group of Mining Engineers from American Mining Congress, inspecting oil sands, Kern River Field. Kern County, California. October 2, 1910. #1:/California-Professional paper 116/mwc00876 ID. Mendenhall, W.C. 876 Lakeview No. 1 oil gusher, this photograph was taken after the derrick had been removed and the well surrounded by a dam of sacks filled with earth. Kern County, California. October 2, 1910. Plate 41-C in U.S. Geological Survey. Professional Paper 116. 1920. #1:/California-Mendenhall Collection/mwc00877 ID. Mendenhall, W.C. 877 The American Oil Fields gusher, Midway Field. Kern County, California. Oct. 3, 1910. #1:/California-Mendenhall Collection/mwc00878 ID. Mendenhall, W.C. 878 Berricks, etc., Kern Oil Field. Kern County, California. 1910. #1:/California-Mendenhall Collection/mwc00879 ID. Mendenhall, W.C. 879 Panorama with photos mwc00880 and mwc0881. General view of Kern River Oil Field from bluffs above the river. Kern County, California. 1910. #1:/California-Mendenhall Collection/mwc00880 ID. Mendenhall, W.C. 880 Panorama with photos mwc00879 and mwc0881. General view of Kern River Oil Field from bluffs above the river. Kern County, California. 1910. #1:/California-Mendenhall Collection/mwc00881 ID. Mendenhall, W.C. 881 Panorama with photos mwc00879 and mwc0880. General view of Kern River Oil Field from bluffs above the river. Kern County, California. 1910. #1:/California-Mendenhall Collection/mwc00882 ID. Mendenhall, W.C. 882 George Otis Smith inspecting Lakeview Oil Gusher. Kern County, California. 1910. #1:/California-Mendenhall Collection/mwc00883 ID. Mendenhall, W.C. 883 Lakeview Oil Gusher. Kern County, California. November 18, 1910. #1:/California-Mendenhall Collection/mwc00884 ID. Mendenhall, W.C. 884 Upper Lakeview Oil Reservoir, Midway Field. Kern County, California. 1910. #1:/California-Mendenhall Collection/mwc00885 ID. Mendenhall, W.C. 885 Outcrop Oil Sand in Lakeview Reservoir. Kern County, California. 1910. #1:/Mendenhall Collection/mwc00886 ID. Mendenhall, W.C. 886 Oil Reservoir for Lakeview gushers product. Kern County, California. 1910. #1:/Mendenhall Collection/mwc00887 ID. Mendenhall, W.C. 887 Oil Reservoir, Mc'Kittrick Field. Kern County, California. 1910. #1:/Mendenhall Collection/mwc00888 ID. Mendenhall, W.C. 888 Oil Reservoir, Mc'Kittrick Field. Kern County, California. 1910. #1:/Mendenhall Collection/mwc00889 ID. Mendenhall, W.C. 889 View from 25 Hills, Midway Oil Field. Kern County, California. 1910. #1:/Mendenhall Collection/mwc00890 ID. Mendenhall, W.C. 890 Play Derrick, Mr. Mileys Son, owner, Mc'Kittrick Oil Field. Kern County, California. 1910. #1:/Mendenhall Collection/mwc00891 ID. Mendenhall, W.C. 891 Mc'Kittrick Oil Field engine house and derricks. Kern County, California. 1910. #1:/Mendenhall Collection/mwc00892 ID. Mendenhall, W.C. 892 Wrecked Derrick of New Gusher Midway Oil Field, temporarily sanded up. Kern County, California. 1910. #1:/Mendenhall Collection/mwc00893 ID. Mendenhall, W.C. 893 Discharging Oil into Reservoir, Mc'Kittrick Field. Kern County, California. 1910. #1:/Mendenhall Collection/mwc00894 ID. Mendenhall, W.C. 894 Wreck of Barrier No. 1, Yuba River. Yuba County, California. 1910. #1:/Mendenhall Collection/mwc00895 ID. Mendenhall, W.C. 895 Gold Dredge, Yub River, above Marysville. Yuba County, California. 1910. #1:/Mendenhall Collection/mwc00896 ID. Mendenhall, W.C. 896 Gold Dredge, Yub River, above Marysville. Yuba County, California. 1910. #1:/Mendenhall Collection/mwc00897 ID. Mendenhall, W.C. 897 Gold Dredge, Yub River, above Marysville. Yuba County, California. 1910. #1:/Mendenhall Collection/mwc00898 ID. Mendenhall, W.C. 898 Panorama with photos mwc0899a and mwc0899b. Buhl Land Slip. 9-9-37. Twin Falls County, Idaho. #1:/Mendenhall Collection/mwc0899a ID. Mendenhall, W.C. 899a Panorama with photos mwc00898 and mwc0899b. Buhl Land Slip. 9-9-37. Twin Falls County, Idaho. #1:/Mendenhall Collection/mwc0899b ID. Mendenhall, W.C. 899b Panorama with photos mwc00898 and mwc0899a. Riverward from Buhl Land Slip. 9-9-37. Twin Falls County, Idaho. #1:/Profession Paper 160-Mendenhall Collection/mwc01116 ID. Mendenhall, W.C.1116 Telephoto view from Owens Valley, showing a typical portion of the great escarpment nearly 2 miles in height. Sierra Nevada Mountains. Inyo County, California. n.d. Published as plate 5-C in U.S. Geological Survey. Professional paper 160. 1930. #1:/Alaska Glaciers/ndr00113 ID. Nichols, D.R. 113 Alaska Glaciers. North toward the terminus of Maclaren Glacier from its outwash plain. Maclaren Glacier is southeast of Mount Hayes. September 10, 1953. #1:/Alaska Glaciers/ndr00140 ID. Nichols, D.R. 140 Alaska Glaciers. Tonsina Glacier, which is northeast of Valdez in the Chugach Mountains. June 18, 1954. #1:/Alaska/ndr00205 ID. Nichols, D.R. 205 Alaska. Ash beds included in varved silts and clays in a 125-foot bluff on the east side of Richardson Highway at mile 75. The ash points up the high contortion of beds within the undisturbed horizontal varves. 1954. Figure 162.1, U.S. Geological Survey Professional Paper 400-B. #1:/Loma Prieta, California, Earthquake October 17, 1989/njk00001 ID. Nakata, J.K. 1ct Loma Prieta, California, Earthquake October 17, 1989. San Francisco. Lack of adequate shear walls on the garage level exacerbated damage to this structure at the corner of Beach and Divisadero in the Marina District. Slide I-6, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/njk00002 ID. Nakata, J.K. 2ct Loma Prieta, California, Earthquake October 17, 1989. San Francisco. An automobile lies crushed under the third story of this apartment building in the Marina District. The ground levels are no longer visible because of structural failure and sinking due to liquefaction. Slide I-8, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/njk00003 ID. Nakata, J.K. 3ct Loma Prieta, California, Earthquake October 17, 1989. San Francisco. Smoldering remains of an apartment complex at the corner of Beach and Divisadero in the Marina District. Slide I-10, U.S. Geological Survey Open- File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/njk00004 ID. Nakata, J.K. 4ct Loma Prieta, California, Earthquake October 17, 1989. San Francisco. A search and rescue team in the Marina District waits for a building to be buttressed before entering. Slide I-11, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/njk00005 ID. Nakata, J.K. 5ct Loma Prieta, California, Earthquake October 17, 1989. San Francisco. Tom Brokaw of NBC News prepares a script for a live broadcast from the Marina District. Slide I-12, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/njk00006 ID. Nakata, J.K. 6ct Loma Prieta, California, Earthquake October 17, 1989. San Francisco. City utility workers removing electric wires from unstable towers. Arresting sparks from broken wires was a priority in those areas with broken gas mains. Slide I- 13, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/njk00007 ID. Nakata, J.K. 7ct Loma Prieta, California, Earthquake October 17, 1989. Oakland. Reinforcement bars lie at the base of the Cypress viaduct of Interstate 880 near 14th Street. Slide III-3, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/njk00008 ID. Nakata, J.K. 8ct Loma Prieta, California, Earthquake October 17, 1989. Oakland. Remnant portion of the north- and south-bound viaduct, exposing box girders near 14th Street. 1989. Slide III-4, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/njk00009 ID. Nakata, J.K. 9ct Loma Prieta, California, Earthquake October 17, 1989. Oakland. Demolition of the Cypress viaduct of Interstate 880 near 14th street. Slide III-12, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/njk00010 ID. Nakata, J.K. 10ct Loma Prieta, California, Earthquake October 17, 1989. Oakland. A building at the corner of Alice Street and 13th Street lost part of its unreinforced brick masonry. Slide III-13, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/njk00011 ID. Nakata, J.K. 11ct. Loma Prieta, California, Earthquake October 17, 1989. Menlo Park. Unfastened bookcases fell in an office building during the primary shock. 1989. Slide VI-1, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/njk00012 ID. Nakata, J.K. 12ct Loma Prieta, California, Earthquake October 17, 1989. Menlo Park. Books and an air-conditioning duct were dislodged during the earthquake. Slide VI-2, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/njk00013 ID. Nakata, J.K. 13ct Loma Prieta, California, Earthquake October 17, 1989. Menlo Park. Seismographs at the U.S. Geological Survey record the north-south horizontal, east-west horizontal, and vertical components of the earthquake. Slide VI-3, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/njk00014 ID. Nakata, J.K. 14ct Loma Prieta, California, Earthquake October 17, 1989. Los Altos. Non-tectonic surface rupture crosses Highway 280 at the interface of a road cut and fill area 2.5 kilometers (1.5 miles) north of Foothill Expressway. Note the partial collapse of the sound wall which was under construction at the time of the earthquake. Slide VII-3, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/njk00015 ID. Nakata, J.K. 15ct Loma Prieta, California, Earthquake October 17, 1989. Los Altos. The cement retaining walls along Highway 280 formed an accordion-like pattern as a result of compression. 1989. Slide VII-4, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/njk00016 ID. Nakata, J.K. 16ct Loma Prieta, California, Earthquake October 17, 1989. Los Gatos. Failure of unreinforced brick masonry caused the collapse of the upper floor of a building downtown. Slide VIII-1, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/njk00017 ID. Nakata, J.K. 17ct Loma Prieta, California, Earthquake October 17, 1989. Los Gatos. Inside a ceramic shop during an aftershock. Slide VIII-2, U.S. Geological Survey Open- File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/njk00018 ID. Nakata, J.K. 18ct Loma Prieta, California, Earthquake October 17, 1989. Los Gatos. Books scattered in a downtown bookstore. 1989. Slide VIII-3, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/njk00019 ID. Nakata, J.K. 19ct Loma Prieta, California, Earthquake October 17, 1989. Los Gatos. Many residents camped in their yards following the earthquake. Slide VIII-4, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/njk00020 ID. Nakata, J.K. 20ct Loma Prieta, California, Earthquake October 17, 1989. Los Gatos. Downtown sidewalk buckled due to compression. Slide VIII-9, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/njk00021 ID. Nakata, J.K. 21ct Loma Prieta, California, Earthquake October 17, 1989. Summit Road area in the Santa Cruz Mountains. A crack system destroyed a driveway adjacent to Summit Road half a mile southeast of Highway 17. Slide IX-2, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/njk00022 ID. Nakata, J.K. 22ct Loma Prieta, California, Earthquake October 17, 1989. Summit Road area in the Santa Cruz Mountains. A geologist traces surface cracks in a corral adjacent to Summit Road approximately 1.6 kilometers (1 mile) southeast of Highway 17. Slide IX-3, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/njk00023 ID. Nakata, J.K. 23ct Loma Prieta, California, Earthquake October 17, 1989. Redwood Grove in the Santa Cruz Mountains. Geologist exchanging information with rescue personnel. Slide X-1, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/njk00024 ID. Nakata, J.K. 24ct Loma Prieta, California, Earthquake October 17, 1989. Redwood Grove in the Santa Cruz Mountains. Bedroom showing the effects of the earthquake. Slide X- 2, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/njk00025 ID. Nakata, J.K. 25ct Loma Prieta, California, Earthquake October 17, 1989. Redwood Grove in the Santa Cruz Mountains. Failure of its downslope support piers destroyed a house. Slide X-3, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/njk00026 ID. Nakata, J.K. 26ct Loma Prieta, California, Earthquake October 17, 1989. Redwood Grove in the Santa Cruz Mountains. Failure of its downslope support piers destroyed a house. Slide X-4, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/njk00027 ID. Nakata, J.K. 27ct Loma Prieta, California, Earthquake October 17, 1989. Boulder Creek in the Santa Cruz Mountains. Collapse of a garage built on fill. Slide XI-1, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/njk00028 ID. Nakata, J.K. 28ct Loma Prieta, California, Earthquake October 17, 1989. Boulder Creek in the Santa Cruz Mountains. The lack of adequate shear walls and construction on fill contributed to the failure of this structure. Slide XI-2, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/njk00029 ID. Nakata, J.K. 29ct Loma Prieta, California, Earthquake October 17, 1989. Boulder Creek in the Santa Cruz Mountains. House torn off its foundation by the main shock. Slide XI-3, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/njk00030 ID. Nakata, J.K. 30ct Loma Prieta, California, Earthquake October 17, 1989. Highway 17 in the Santa Cruz Mountains. This road cut near Summit Road failed during the initial earthquake and subsequent aftershocks. To mitigate further sliding, Caltrans decreased the slope angle. Slide XII-3, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/njk00031 ID. Nakata, J.K. 31ct Loma Prieta, California, Earthquake October 17, 1989. Santa Cruz Area. "Unsafe to occupy" signs were posted by the Governor's Office of Emergency Services. Slide XIII-8, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/njk00032 ID. Nakata, J.K. 32ct Loma Prieta, California, Earthquake October 17, 1989. Santa Cruz Area. Collapsed outer wall of the Medico Dental Building near the Pacific Garden Mall. Slide XIII-9, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/njk00033 ID. Nakata, J.K. 33ct Loma Prieta, California, Earthquake October 17, 1989. Watsonville area. Houses not bolted down securely were easily dislodged from their foundations in downtown Watsonville. Slide XIV-6, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/njk00034 ID. Nakata, J.K. 34ct Loma Prieta, California, Earthquake October 17, 1989. Watsonville area. Many homeowners buttressed their foundations to prevent further damage from aftershocks in downtown Watsonville. 1989. Slide XIV-7, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/njk00035 ID. Nakata, J.K. 35ct Loma Prieta, California, Earthquake October 17, 1989. Watsonville area. Collapsed porch in downtown Watsonville. Slide XIV-9, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/njk00036 ID. Nakata, J.K. 36ct Loma Prieta, California, Earthquake October 17, 1989. Watsonville area. This house was dislodged and moved 0.75 meter (2.5 feet) from the cement stairway in downtown Watsonville. Slide XIV-10, U.S. Geological Survey Open- File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/njk00037 ID. Nakata, J.K. 37ct Loma Prieta, California, Earthquake October 17, 1989. Watsonville area. Collapsed bridge section on Highway 1 at Struve Slough. Slide XIV-12, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/njk00038 ID. Nakata, J.K. 38 Loma Prieta, California, Earthquake October 17, 1989. Watsonville area. Failure at the joist/columns interface contributed to the collapse of the roadbed on Highway 1. Slide XIV-13, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/njk00039 ID. Nakata, J.K. 39ct Loma Prieta, California, Earthquake October 17, 1989. Watsonville area. A fracture cuts the roadbed, curbs, and railings on the collapsed portion of Highway 1 at Struve Slough. Slide XIV-16, U.S. Geological Survey Open-File Report 90-547. #1:/Bulletin 724/nlf00009 ID. Noble, L.F. 9 Gravel cliffs along Amargosa River about 2 miles above Acme station. Inyo County, California. n.d. Published as plate 18-C in U.S. Geoligical Survey. Bulletin 724. 1922. #1:/Bulletin 724/nlf00013 ID. Noble, L.F. 13 East side of Bully Hill, showing end of trench T-12. Inyo County, California. n.d. Published as plate 27-B in U.S. Geoligical Survey. Bulletin 724. 1922. #1:/Bulletin 724/nlf00015 ID. Noble, L.F. 15 Rainbow Mountain, Acme. Inyo County, California. n.d. Published as plate 20-B in U.S. Geoligical Survey. Bulletin 724. 1922. #1:/Bulletin 724/nlf00022 ID. Noble, L.F. 22 View eastward along trench T-12, Bully Hill. Inyo County, California. n.d. Published as plate 28-A in U.S. Geoligical Survey. Bulletin 724. 1922. #1:/Bulletin 724/nlf00025 ID. Noble, L.F. 25 Intersecting chains of pits across hill east of Bully Hill. Inyo County, California. n.d. Published as plate 28-B in U.S. Geoligical Survey. Bulletin 724. 1922. #1:/Bulletin 724/nlf00031 ID. Noble, L.F. 31 Funnel hole in nitrate ground, Bully Hill. Inyo County, California. n.d. Published as plate 29-A in U.S. Geoligical Survey. Bulletin 724. 1922. #1:/Bulletin 724/nlf00033 ID. Noble, L.F. 33 Nitrate deposits in the Bully Hillarea, showing characteristic arrangement. Inyo County, California. n.d. Published as plate 29-B in U.S. Geoligical Survey. Bulletin 724. 1922. #1:/Bulletin 724/nlf00038 ID. Noble, L.F. 38 Head of Amphitheater Canyon, showing location of spur and ravine cuts. San Bernardino County, California. n.d. Published as plate 6-A in U.S. Geoligical Survey. Bulletin 724. 1922. #1:/Bulletin 724/nlf00039 ID. Noble, L.F. 39 Trench No. 3 on west slope of hill No. 3, west end of Saratoga Niter Hills. San Bernardino County, California. n.d. Panorama with photos 40 and 41). Published as plate 11 in U.S. Geoligical Survey. Bulletin 724. 1922. #1:/Bulletin 724/nlf00040 ID. Noble, L.F. 40 Trench No. 3 on west slope of hill No. 3, west end of Saratoga Niter Hills. San Bernardino County, California. n.d. Panorama with photos 39 and 41). Published as plate 11 in U.S. Geoligical Survey. Bulletin 724. 1922. #1:/Bulletin 724/nlf00041 ID. Noble, L.F. 41 Trench No. 3 on west slope of hill No. 3, west end of Saratoga Niter Hills. San Bernardino County, California. n.d. Panorama with photos 39 and 40). Published as plate 11 in U.S. Geoligical Survey. Bulletin 724. 1922. #1:/Bulletin 724/nlf00044 ID. Noble, L.F. 44 Hill No. 3 from northwest end of Saratoga Niter Hills. San Bernardino County, California. n.d. Published as plate 10-A in U.S. Geoligical Survey. Bulletin 724. 1922. #1:/Bulletin 724/nlf00046 ID. Noble, L.F. 46 Trench No. 2, at northwest base of hill No. 1, west end of Saratoga Niter Hills. San Bernardino County, California. n.d. Published as plate 10-B in U.S. Geoligical Survey. Bulletin 724. 1922. #1:/Bulletin 724/nlf00048 ID. Noble, L.F. 48 Dividing material after it has been ground. Sampling operations. San Bernardino County, California. n.d. Published as plate 4-B in U.S. Geoligical Survey. Bulletin 724. 1922. #1:/Bulletin 724/nlf00050 ID. Noble, L.F. 50 Mouth of Amphitheater Canyon, showing cut in gypsiferous sandstones. San Bernardino County, California. n.d. Published as plate 4-B in U.S. Geoligical Survey. Bulletin 724. 1922. #1:/Bulletin 724/nlf00055 ID. Noble, L.F. 55 Testing a sample of nitrate with portable field outfit. San Bernardino County, California. n.d. Published as plate 3-B in U.S. Geoligical Survey. Bulletin 724. 1922. #1:/Bulletin 724/nlf00057 ID. Noble, L.F. 57 View from Amphitheater Canyon across South Death Valley, showing characteristic outcrip of salt caliche marking bed of rock salt. San Bernardino County, California. n.d. Published as plate 6-B in U.S. Geoligical Survey. Bulletin 724. 1922. #1:/Bulletin 724/nlf00072 ID. Noble, L.F. 72 The Saratoga Niter Hills. View southwestward from the top of hill No. 3. San Bernardino County, California. n.d. Panorama with photo no 73. Published as plate 2 in U.S. Geoligical Survey. Bulletin 724. 1922. #1:/Bulletin 724/nlf00073 ID. Noble, L.F. 73 The Saratoga Niter Hills. View southwestward from the top of hill No. 3. San Bernardino County, California. n.d. Panorama with photo no. 72. Published as plate 2 in U.S. Geoligical Survey. Bulletin 724. 1922. #1:/Grand Canyon National Park/nlf00094 ID. Noble, L.F. 94 Grand Canyon National Park, Arizona. Traveling on a trail in the Grand Canyon with a pack train. Circa 1908. Plate 2-A, U.S. Geological Survey Bulletin 549. #1:/Grand Canyon National Park/nlf00095 ID. Noble, L.F. 95 Grand Canyon National Park, Arizona. At Bedrock Tank in Bass Canyon. Circa 1908. Plate 2-B, U.S. Geological Survey Bulletin 549. #1:/Grand Canyon National Park/nlf00096 ID. Noble, L.F. 96 Grand Canyon National Park, Arizona. Granite Gorge near the cable crossing. Shows the open gorge due to the presence of weak and easily eroded strata of the Unkar Group. The cable crossing is at the narrowest point on the river. Circa 1908. Plate 3-A, U.S. Geological Survey Bulletin 549. #1:/Grand Canyon National Park/nlf00097 ID. Noble, L.F. 97 Grand Canyon National Park, Arizona. Powell Plateau across Muav Saddle from the Kaibab. The effect of the West Kaibab fault may be seen in Muav Canyon (about center of photo nlf00098) in the flexed beds of sandstone of the Supai Formation and the Muav Saddle, where the beds of Kaibab Limestone that form the surface of Powell Plateau plunge downward into the saddle directly toward the observer. Circa 1908. Plate 4-A, U.S. Geological Survey Bulletin 549. Photos nlf00097, nlf00098, and nlf00099 form a panorama. #1:/Grand Canyon National Park/nlf00098 ID. Noble, L.F. 98 Grand Canyon National Park, Arizona. Powell Plateau across Muav Saddle from the Kaibab. The effect of the West Kaibab fault may be seen in Muav Canyon (about center of photo nlf00098) in the flexed beds of sandstone of the Supai Formation and the Muav Saddle, where the beds of Kaibab Limestone that form the surface of Powell Plateau plunge downward into the saddle directly toward the observer. Circa 1908. Plate 4-A, U.S. Geological Survey Bulletin 549. Photos nlf00097, nlf00098, and nlf00099 form a panorama. #1:/Grand Canyon National Park/nlf00099 ID. Noble, L.F. 99 Grand Canyon National Park, Arizona. Powell Plateau across Muav Saddle from the Kaibab. The effect of the West Kaibab fault may be seen in Muav Canyon (about center of photo nlf00098) in the flexed beds of sandstone of the Supai Formation and the Muav Saddle, where the beds of Kaibab Limestone that form the surface of Powell Plateau plunge downward into the saddle directly toward the observer. Circa 1908. Plate 4-A, U.S. Geological Survey Bulletin 549. Photos nlf00097, nlf00098, and nlf00099 form a panorama. #1:/Grand Canyon National Park/nlf00100 ID. Noble, L.F. 100 Grand Canyon National Park, Arizona. Unkar wedge from Tonto platform on the south side of the Colorado River. Circa 1908. Plate 4-B, U.S. Geological Survey Bulletin 549. Photos nlf00100, nlf00101, and nlf00102 form a panorama. #1:/Grand Canyon National Park/nlf00101 ID. Noble, L.F. 101 Grand Canyon National Park, Arizona. Unkar wedge from Tonto platform on the south side of the Colorado River. Circa 1908. Plate 4-B, U.S. Geological Survey Bulletin 549. Photos nlf00100, nlf00101, and nlf00102 form a panorama. #1:/Grand Canyon National Park/nlf00102 ID. Noble, L.F. 102 Grand Canyon National Park, Arizona. Unkar wedge from Tonto platform on the south side of the Colorado River. Circa 1908. Plate 4-B, U.S. Geological Survey Bulletin 549. Photos nlf00100, nlf00101, and nlf00102 form a panorama. #1:/Grand Canyon National Park/nlf00103 ID. Noble, L.F. 103 Grand Canyon National Park, Arizona. Northward from Bass Camp, showing Mount Huethawali, a butte on the Esplanade (on the left), and Huxley Terrace, a dissected spur on the Esplanade. Mount Huethawali was once part of a great promontory of the Coconino Plateau, but has been isolated by erosion. Its summit is composed of two formations of rock that are very resistant to erosion, the Kaibab Limestone and the Coconino Sandstone. These make a cap that prevents the soft shales of the Supai Formation, which are in the lower part of the butte, from wasting rapidly away. As time goes on, the cap will dwindle to a mere knob, like that which surmounts Holy Grail Temple; finally it will disappear entirely and the soft shales beneath, being no longer protected, will be removed from the floor of the Esplanade. This photograph, which was taken after an exceptionally heavy snow fall, shows about the maximum extension of the snow line downward in the canyon in winter. Circa 1908. Plate 7-A, U.S. Geological Survey Bulletin 549. #1:/Grand Canyon National Park/nlf00104 ID. Noble, L.F. 104 Grand Canyon National Park, Arizona. North from Bass Camp, showing Mount Huethawali, a butte on the Esplanade (on the left) and Huxley Terrace, a dissected spur on the Esplanade. Circa 1908. #1:/Grand Canyon National Park/nlf00105 ID. Noble, L.F. 105 Grand Canyon National Park, Arizona. East wall of the canyon of Shinumo Creek near Shinumo Garden. Circa 1908. Plate 8-A, U.S. Geological Survey Bulletin 549. #1:/Grand Canyon National Park/nlf00106 ID. Noble, L.F. 106 Grand Canyon National Park, Arizona. East up the Colorado River from a point near the mouth of Bass Canyon, showing Granite Gorge. Circa 1908. Plate 8-B, U.S. Geological Survey Bulletin 549. #1:/Grand Canyon National Park/nlf00107 ID. Noble, L.F. 107 Grand Canyon National Park, Arizona. Bass Limestone in Hotauta Canyon. Circa 1908. Plate 10-A, U.S. Geological Survey Bulletin 549. #1:/Grand Canyon National Park/nlf00108 ID. Noble, L.F. 108 Grand Canyon National Park, Arizona. Quartzite in the canyon of Shinumo Creek. Shinumo Garden, irrigated from Shinumo Creek, is shown in the lower right. Circa 1908. Plate 12-B, U.S. Geological Survey Bulletin 549. #1:/Grand Canyon National Park/nlf00109 ID. Noble, L.F. 109 Grand Canyon National Park, Arizona. Cable crossing, looking down the Colorado River. 1908. Plate 13-A, U.S. Geological Survey Bulletin 549. #1:/Grand Canyon National Park/nlf00110 ID. Noble, L.F. 110 Grand Canyon National Park, Arizona. Shinumo Creek, lower contact of diabase sill. Circa 1908. Plate 14-A, U.S. Geological Survey Bulletin 549. #1:/Grand Canyon National Park/nlf00111 ID. Noble, L.F. 111 Grand Canyon National Park, Arizona. Lower contact of diabase sill at Bedrock Tank in Bass Canyon. Plate 14-B, U.S. Geological Survey Bulletin 549. #1:/Grand Canyon National Park/nlf00112 ID. Noble, L.F. 112 Grand Canyon National Park, Arizona. Muav Limestone in Muav Canyon. Pack train near the center. Circa 1908. Plate 15-A, U.S. Geological Survey Bulletin 549. #1:/Grand Canyon National Park/nlf00113 ID. Noble, L.F. 113 Grand Canyon National Park, Arizona. Wheeler fold in Bass Canyon. Down Bass Canyon from the summit of Tapeats Sandstone. The strata in the fold are beds of Bass Limestone. The fold is overlain unconformably by Tapeats Sandstone, which appears in the upper right corner. Circa 1908. Plate 16-B, U.S. Geological Survey.Bulletin 549. #1:/Grand Canyon National Park/nlf00114 ID. Noble, L.F. 114 Grand Canyon National Park, Arizona. Pinnacles of erosion in Kaibab Limestone along the rim of Kaibab Plateau. These pinnacles or "hoodoos" are characteristic features of the scenery along the north rim of the Grand Canyon in the Kaibab division. They are carved in the Kaibab Limestone by rain erosion. Each column is capped by a portion of the resistant cherty layer at the summit of the formation, which protects the softer and more easily eroded beds beneath. Although the cherty layer is also present on the south side of the Grand Canyon, pinnacles are rarely formed there, for the rainfall is less. Circa 1908. Plate 16-A, U.S. Geological Survey Bulletin 549. #1:/Grand Canyon National Park/nlf00116 ID. Noble, L.F. 116 Grand Canyon National Park, Arizona. Geologic history of the Shinumo Quadrangle as shown by the lithologic record in the canyon wall. Circa 1908. #1:/Grand Canyon National Park/nlf00124 ID. Noble, L.F. 124 Grand Canyon National Park, Arizona. Typical exposure of Bright Angel Shale, Maw Limestone, Temple Butte Limestone, Redwall Limestone, and Supai Formation in the north wall of the Grand Canyon opposite Garnet Canyon. Circa 1920. Plate 21-B, U.S. Geological Survey Professional Paper 131. #1:/Grand Canyon National Park/nlf00128 ID. Noble, L.F. 128 Grand Canyon National Park, Arizona. Fossil tracks on a slab of Coconino Sandstone at Hermit Trail. Circa 1920. Plate 25-A, U.S. Geological Survey Professional Paper 131. #1:/Narten P.F. Collection-Weber Mine/npf00001 ID. Narten, P.F. 1 Loose coal waste at the old abandoned Weber mine. In more that 30 years, except on the north slopes, few plants have been able to establish themselves on these coal wastes because of high surface temperatures. The background shows typical pinyon-juniper woodland and sagebrush lands with patches of grassland. The spoils have been left undisturbed; they lack grading, topsoiling, and seeding characteristics of later surface-mining operations. Men at left for scale. Summit County, Utah. October 1978. Frontispiece upper photo, in U.S. Geological Survey. Circular 872. 1983. #1:/Narten P.F. Collection-Reminger Coal Mine/npf00006 ID. Narten, P.F. 6 Waste coal dumped below the entry of the abandoned Reminger coal mine. A single 8- to 10-foot coal bed was mined and transported to bins through wooden chutes. The mine ceased production in the late 1940's. This scene is typical of the entrances of old abandoned underground coal mines. Sparse clumps of rice grass grow on the base of the slack coal. The woody debris consists mainly of juniper trees that were killed by landslides. These steep slopes are not conducive to revegetation. The rockfall has partly covered the old access road in the foreground. Emery County, Utah. October 1978. Figure 6 in U.S. Geological Survey. Circular 872. 1983. #1:/Nelson W.H. Collection/nwh00003 ID. Nelson, W.H. 3 Shorelines of glacial Lake Missoula. Eastward across Rattlesnake Creek valley to Jumbo Mountain. Missoula County, Montana.n.d. #1:/Osterwald F.W. Collection-Rex Mine/ofw00007 ID. Osterwald, F.W. 7 West along length of stoped-out ore roll, showing fault along north (right) side of roll, Ore zone (dark), about 2 feet wide, is adjacent to south side of fault. Rex No. 1 mine, Temple Mountain district, Emery County, Utah. ca. 1957. Figure 49 in U.S. Geological Survey. Professional paper 455-G. 1965. #1:/Osterwald F.W. Collection-Rex Mine/ofw00008 ID. Osterwald, F.W. 8 Fault in back of stoped-out ore roll. Dark areas along fault are ore in irregular zone as much as 2 feet wide. Rex No. 1 mine, Temple Mountain district. Emery County, Utah. ca. 1957. Figure 50 in U.S. Geological Survey. Professional paper 455-G. 1965. #1:/Osterwald F.W. Collection-Rex Mine/ofw00009 ID. Osterwald, F.W. 9 Uranium ore (dark) about 1 1/2 feet wide, in fault at east end of ore roll, Rex No.1 mine, Temple Mountain district, Emery County, Utah. ca. 1957. Figure 51 in U.S. Geological Survey. Professional paper 455-G. 1965. #1:/Klondike Gold Rush National Historic Park/pai00020 ID. Paige, S. 20 Klondike Gold Rush National Historic Park, Alaska. Skagway, viewed from the bench east of town. June 6, 1903. Photos pai00020 and pai00021 form a panorama. #1:/Klondike Gold Rush National Historic Park/pai00021 ID. Paige, S. 21 Klondike Gold Rush National Historic Park, Alaska. Skagway, viewed from the bench east of town. June 6, 1903. Photos pai00020 and pai00021 form a panorama. #1:/Klondike Gold Rush National Historic Park/pai00025 ID. Paige, S. 25 Klondike Gold Rush National Historic Park, Alaska. Down the valley toward the White Pass railroad route. June 11, 1903 #1:/Klondike Gold Rush National Historic Park/pai00028 ID. Paige, S. 28 Klondike Gold Rush National Historic Park, Alaska. Single steam engine, moving near White Pass Hotel Station(?). Passengers on the platform near the snowshed or overpass in the left background. June 11, 1903. #1:/Klondike Gold Rush National Historic Park/pai00212 ID. Paige, S. 212 Klondike Gold Rush National Historic Park, Alaska. Passengers, gathered outside the White Pass & Yukon Railroad Station at White Pass. Sidney Paige in the white hat. Circa 1900 #1:/Alaska Glaciers/pai00665 ID. Paige, S. 665 Alaska Glaciers. Front of Shoup Glacier, which is west of Valdez in the Chugach Mountains. 1905. Photos pai00665, pai00666, and pai00667 form a panorama. #1:/Alaska Glaciers/pai00666 ID. Paige, S. 666 Alaska Glaciers. Front of Shoup Glacier, which is west of Valdez in the Chugach Mountains. 1905. Photos pai00665, pai00666, and pai00667 form a panorama. #1:/Alaska Glaciers/pai00667 ID. Paige, S. 667 Alaska Glaciers. Front of Shoup Glacier, which is west of Valdez in the Chugach Mountains. 1905. Photos pai00665, pai00666, and pai00667 form a panorama. #1:/Alaska Glaciers/pai00683 ID. Paige, S. 683 Alaska Glaciers. Barry Glacier and the entrance to Harriman Fjord. Barry Glacier is east of Anchorage in the Chugach Mountains August 20, 1905. #1:/Alaska Glaciers/pai00685 ID. Paige, S. 685 Alaska Glaciers. Barry Glacier and the entrance to Harriman Fjord. Barry Glacier is east of Anchorage in the Chugach Mountains. August 20, 1905. Plate 20-A, U.S. Geological Survey Bulletin 526. #1:/Alaska Glaciers/pai00692 ID. Paige, S. 692 Alaska Glaciers. Bryn Mawr Glacier, which is northwest of Valdez in the Chugach Mountains. August 21, 1905. Plate 15-B, U.S. Geological Survey Bulletin 526. #1:/Alaska Glaciers/pai00693 ID. Paige, S. 693 Alaska Glaciers. Harvard Glacier and College Fjord. Harvard Glacier is northwest of Valdez in the Chugach Mountains. August 1905. #1:/Alaska Glaciers/pai00731 ID. Paige, S. 731 Alaska Glaciers. Toboggan Glacier and Harriman Fjord. Toboggan Glacier is southeast of Anchorage in the Chugach Mountains. August 20, 1905. Plate 23-A, U.S. Geological Survey Bulletin 526. See Photo No. mbf00009 for matching pair. #1:/Alaska Glaciers/pai00799 ID. Paige, S. 799 Alaska Glaciers. Bartlett Glacier, which is northeast of Seward in the Chugach Mountains, viewed from milepost 49 on the Alaska Central Railway. Circa 1905. Photos pai00799 and pai00800 form a panorama. #1:/Alaska Glaciers/pai00800 ID. Paige, S. 800 Alaska Glaciers. Bartlett Glacier, which is northeast of Seward in the Chugach Mountains, viewed from milepost 49 on the Alaska Central Railway. Circa 1905. Photos pai00799 and pai00800 form a panorama. #1:/Rainbow Bridge National Monument/pai01471 ID. Paige, S. 1471 Rainbow Bridge National Monument, Utah. Rainbow Bridge, looking south 25 degrees east from a point about 60 feet above the creek on the south bank, about 650 feet away. 1921. #1:/Rainbow Bridge National Monument/pai01472 ID. Paige, S. 1472 Rainbow Bridge National Monument, Utah. Looking south 80 degrees west, from about 60 feet above the north abutment and 400 feet from it. 1921. #1:/Rainbow Bridge National Monument/pai01475 ID. Paige, S. 1475 Rainbow Bridge National Monument, Utah. Looking down stream north 45 degrees west at Rainbow Bridge. 1921. #1:/Rainbow Bridge National Monument/pai01478 ID. Paige, S. 1478 Rainbow Bridge National Monument, Utah. Looking down the Narrow Canyon, a tributary of Rainbow Bridge Canyon. Ascending the canyon, one turns left up the Narrow Canyon. 1921. #1:/Palmer A.R. Collection/par00055 ID. Palmer, A.R. 55 Outcrop of mud cracks in rippled upper surface of the Emigrant Pass Member, Desert Range section. Clark County, Nevada.n.d. Figure 4-A in U.S. Geological Survey. Professional paper 1047. 1979. #1:/Hawaii Volcanoes National Park/pdl00016 ID. Peck, D.L. 16 Hawaii Volcanoes National Park. August 21-23, 1963, eruption of Kilauea Volcano. Eruption in Alae Crater at 1#1:10 a.m., August 22, 1963, viewed from the north rim. Incandescent bubbling areas (light-colored) are about 10 meters in diameter. Figure 8, U.S. Geological Survey Professional Paper 935-A. #1:/Hawaii Volcanoes National Park/pdl00017 ID. Peck, D.L. 17 Hawaii Volcanoes National Park. August 21-23, 1963, eruption of Kilauea Volcano. Eruption in Alae Crater at 3:00 p.m., August 22, 1963, viewed from the overlook at the south rim of the crater. Behind and to the left of the vent is a 50-meter cliff at the end of the forested mezzanine. The degassing vents on the far floor are bubbling to an average height of 3 meters. The lake surface looks like a mosaic because of patterned differences in surface texture parallel to glowing cracks. Figure 9, U.S. Geological Survey Professional Paper 935-A. #1:/Hawaii Volcanoes National Park/pdl00018 ID. Peck, D.L. 18 Hawaii Volcanoes National Park. August 21-23, 1963, eruption of Kilauea Volcano. Fountain in Alae Crater at 5:45 p.m., August 22, 1963, viewed from the mezzanine. Height of the fountain is about 5 meters. The ribbon spatter on the top was produced by the bursting of a bubble of lava an instant before the photograph was taken. Photo by S. Aramaki. Figure 10, U.S. Geological Survey Professional Paper 935-A. #1:/Hawaii Volcanoes National Park/pdl00019 ID. Peck, D.L. 19 Hawaii Volcanoes National Park. August 21-23, 1963, eruption of Kilauea Volcano. Eruption in Alae Crater at about 6:00 p.m., August 22, 1963, viewed from the overlook. Two sets of glowing cracks break the dark crust, one near to and concentric with the fountain, which was about 35 meters long, and another radial to the fountain which outlines lobate areas of crust. Crustal foundering (light spots) occurs at the distal ends of the lobes. A marginal levee of slabs and small festooned flows can be dimly seen in the left foreground. Photo by T. Miyasaki, August 22, 1963. Figure 11, U.S. Geological Survey Professional Paper 935-A. #1:/Hawaii Volcanoes National Park/pdl00024 ID. Peck, D.L. 24 Hawaii Volcanoes National Park. August 21-23, 1963, eruption of Kilauea Volcano. Pressure dome in the moat at the south edge of Alae lava lake. 1963. Figure 19, U.S. Geological Survey Professional Paper 935-A. #1:/Hawaii Volcanoes National Park/pdl00025 ID. Peck, D.L. 25 Hawaii Volcanoes National Park. August 21-23, 1963, eruption of Kilauea Volcano. Alae lava lake, viewed from the talus at the south edge of the lake. Features visible include the floor of the moat, a levee, festooned pahoehoe flows partially enclosing slabs of crust, and a spatter cone formed by fountains on the floor of Alae Crater. August 31, 1963. Figure 20, U.S. Geological Survey Professional Paper 935-A. Photos pd100025, pd100026, pd100027, and pd100028 form a panorama. #1:/Hawaii Volcanoes National Park/pdl00026 ID. Peck, D.L. 26 Hawaii Volcanoes National Park. August 21-23, 1963, eruption of Kilauea Volcano. Alae lava lake, viewed from the talus at the south edge of the lake. Features visible include the floor of the moat, a levee, festooned pahoehoe flows partially enclosing slabs of crust, and a spatter cone formed by fountains on the floor of Alae Crater. August 31, 1963. Figure 20, U.S. Geological Survey Professional Paper 935-A. Photos pd100025, pd100026, pd100027, and pd100028 form a panorama. #1:/Hawaii Volcanoes National Park/pdl00027 ID. Peck, D.L. 27 Hawaii Volcanoes National Park. August 21-23, 1963, eruption of Kilauea Volcano. Alae lava lake, viewed from the talus at the south edge of the lake. Features visible include the floor of the moat, a levee, festooned pahoehoe flows partially enclosing slabs of crust, and a spatter cone formed by fountains on the floor of Alae Crater. August 31, 1963. Figure 20, U.S. Geological Survey Professional Paper 935-A. Photos pd100025, pd100026, pd100027, and pd100028 form a panorama. #1:/Hawaii Volcanoes National Park/pdl00028 ID. Peck, D.L. 28 Hawaii Volcanoes National Park. August 21-23, 1963, eruption of Kilauea Volcano. Alae lava lake, viewed from the talus at the south edge of the lake. Features visible include the floor of the moat, a levee, festooned pahoehoe flows partially enclosing slabs of crust, and a spatter cone formed by fountains on the floor of Alae Crater. August 31, 1963. Figure 20, U.S. Geological Survey Professional Paper 935-A. Photos pd100025, pd100026, pd100027, and pd100028 form a panorama. #1:/Hawaii Volcanoes National Park/pdl00029 ID. Peck, D.L. 29 Hawaii Volcanoes National Park. August 21-23, 1963, eruption of Kilauea Volcano. Pressure dome of jumbled slabs near the northwest edge of Alae lava lake. 1963. Figure 22, U.S. Geological Survey Professional Paper 935-A. #1:/Hawaii Volcanoes National Park/pdl00030 ID. Peck, D.L. 30 Hawaii Volcanoes National Park. August 21-23, 1963, eruption of Kilauea Volcano. Twisted ribbon bomb (1 meter long) on the surface of Alae lava lake. 1963. Figure 23, U.S. Geological Survey Professional Paper 935-A. #1:/Hawaii Volcanoes National Park/pdl00031 ID. Peck, D.L. 31 Hawaii Volcanoes National Park. August 21-23, 1963, eruption of Kilauea Volcano. Pressure ridge formed from the crust of a linear oozeup on Alae lava lake. 1963. Figure 25, U.S. Geological Survey Professional Paper 935-A. #1:/Loma Prieta, California, Earthquake October 17, 1989/pdm00001 ID. Peterson, D.M. 1ct Loma Prieta, California, Earthquake October 17, 1989. San Francisco and San Mateo County Coast. Cliff failure just south of San Gregorio Beach. The slide is 18.3 meters (60 feet) high and displaces approximately 6,881 cubic meters of material. The large boulders are 1 meter in size. Slide IV-1, U.S. Geological Survey Open-File Report 90-547. 1990. #1:/Loma Prieta, California, Earthquake October 17, 1989/pdm00002 ID. Peterson, D.M. 2ct Loma Prieta, California, Earthquake October 17, 1989. San Francisco and San Mateo County Coast. Cliff failure north of Tunitas Creek. This face continued to slide for a few days following the earthquake. The event exposed dark cliff material. Slide IV-2, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/pdm00003 ID. Peterson, D.M. 3ct Loma Prieta, California, Earthquake October 17, 1989. San Francisco and San Mateo County Coast. Landslide north of Fort Funston. This slide mass is approximately 2,830 cubic meters of material and is 30 meters high. Slide IV- 3, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/pdm00004 ID. Peterson, D.M. 4ct Loma Prieta, California, Earthquake October 17, 1989. San Francisco and San Mateo County Coast. Head scarp of a small slide at Redondo Beach. The red- handled rock hammer is 30.5 centimeters (12 inches) long. Slide IV-4, U.S. Geological Survey Open-File Report 90-547. #1:/Grand Teton National Park/pef00121 ID. Patterson, E.F. 121 Grand Teton National Park, Wyoming. West from Signal Mountain across Jackson Lake to Mount Moran in the Teton Range. 1957. #1:/Grand Teton National Park/pef00122 ID. Patterson, E.F. 122 Grand Teton National Park, Wyoming. West from Timbered Island on the floor of Jackson Hole to Grand Teton peak. 1957. #1:/Patterson E.F. Collection/pef00700 ID. Patterson, E.F. 700 Dragline excavator is removing overburden at Edna strip operations. Oak Creek, Routt County, Colorado. 1960. #1:/Patterson E.F. Collection-Edna Coal Company/pef00701 ID. Patterson, E.F. 701 J. Paul Storrs, mining engineer, U.S. Geological Survey, examining cut where overburden was removed from public coal lease of Edna Coal Company. Routt County, Colorado. 1960. #1:/Patterson E.F. Collection-Edna Coal Company/pef00703 ID. Patterson, E.F. 703 J. Paul Storrs, mining engineer, U.S. Geological Survey, examining stripping operations and dragline on Edna Coal Company's lease. Oak Creek, Routt County, Colorado. 1960. #1:/Patterson E.F. Collection-Edna Mine/pef00708 ID. Patterson, E.F. 708 U.S. Geological Survey, mining engineer obtaining information concerning coal-loading operations at Edna strip pit on public land near Oak Creek, Routt County, Colorado. 1960. #1:/Patterson E.F. Collection-Edna Mine/pef00709 ID. Patterson, E.F. 709 Overburden, light colored material, and coal in foreground on public land, Edna strip pit. Oak Creek, Routt County, Colorado. 1960. #1:/Patterson E.F. Collection-Edna Mine/pef00713 ID. Patterson, E.F. 713 U.S. Geological Survey, mining engineer, observing dumping coal into storage bin of Edna Coal Company. Oak Creek, Routt County, Colorado. 1960. #1:/Patterson E.F. Collection-Edna Mine/pef00715 ID. Patterson, E.F. 715 Conveyor belt haulage and tipple of Edna strip mining operation. Oak Creek, Routt County, Colorado. 1960. #1:/Patterson E.F. Collection-ColoWyo Coal Company/pef00716 ID. Patterson, E.F. 716 ColoWyo Coal Company's tipple located near Axial. Moffat County, Colorado. 1960. #1:/Patterson E.F. Collection-ColoWyo Coal Company/pef00717 ID. Patterson, E.F. 717 The underground loading of coal in ColoWyo Coal Company's mine near Axial. Moffat County, Colorado. 1960. #1:/Patterson E.F. Collection-ColoWyo Coal Company/pef00723 ID. Patterson, E.F. 723 Beginning construction of wooden wall to direct airflow in ColoWyo Coal Company's mine. Axial, Moffat County, Colorado. 1960. #1:/Patterson E.F. Collection-ColoWyo Coal Company/pef00730 ID. Patterson, E.F. 730 J. Paul Storrs, mining engineer, U.S. Geological Survey, examining the coal in ColoWyo Coal Company's mine near Axial. Moffat County, Colorado. 1960. #1:/Glacier National Park/pem00040 ID. Parks, E.M. 40 Glacier National Park, Montana. Pocket Lake, viewed from the benchmark on the first peak north of Bowman Lake. 1913. #1:/Glacier National Park/pem00041 ID. Parks, E.M. 41 Glacier National Park, Montana. West Flattop Mountain looking northeast to Cathedral Peak. 1913. #1:/Glacier National Park/pem00042 ID. Parks, E.M. 42 Glacier National Park, Montana. Cathedral Peak, viewed from the extreme northern end of West Flattop. 1913. #1:/Glacier National Park/pem00044 ID. Parks, E.M. 44 Glacier National Park, Montana. Ripple-marked sandstone in "red Kintla," viewed from the crest of Chapman Peak immediately northeast of Brown's Pass. Boulder Glacier on the west, steep back wall. 1913. #1:/Glacier National Park/pem00045 ID. Parks, E.M. 45 Glacier National Park, Montana. Lower lava showing flow structure at the foot of Boulder Glacier. 1913. #1:/Glacier National Park/pem00046 ID. Parks, E.M. 46 Glacier National Park, Montana. From half-way up Mount Cleveland: Vulture Peak on the extreme right (photo pem00046), Valentine Creek in the center (photo pem00047), and Porcupine Ridge in the foreground (photo pem00048). 1913. Photos pem00046, pem00047, pem00048 form a panorama. #1:/Glacier National Park/pem00047 ID. Parks, E.M. 47 Glacier National Park, Montana. From half-way up Mount Cleveland: Vulture Peak on the extreme right (photo pem00046), Valentine Creek in the center (photo pem00047), and Porcupine Ridge in the foreground (photo pem00048). 1913. Photos pem00046, pem00047, pem00048 form a panorama. #1:/Glacier National Park/pem00048 ID. Parks, E.M. 48 Glacier National Park, Montana. From half-way up Mount Cleveland: Vulture Peak on the extreme right (photo pem00046), Valentine Creek in the center (photo pem00047), and Porcupine Ridge in the foreground (photo pem00048). 1913. Photos pem00046, pem00047, pem00048 form a panorama. #1:/Glacier National Park/pem00050 ID. Parks, E.M. 50 Glacier National Park, Montana. Bench Lake on Kootenai Ridge. 1913. Photos pem00050 and pem00051 form a panorama. #1:/Glacier National Park/pem00051 ID. Parks, E.M. 51 Glacier National Park, Montana. Bench Lake on Kootenai Ridge. 1913. Photos pem00050 and pem00051 form a panorama. #1:/Glacier National Park/pem00053 ID. Parks, E.M. 53 Glacier National Park, Montana. From the summit of Trapper Peak: Logging Mountain in the center (photo pem00053), Vulture Peak and Glacier (photo pem00054) to The Guardhouse on the right (photo pem00055). 1913. Photos pem00053, pem00054, pem00055 form a panorama. #1:/Glacier National Park/pem00054 ID. Parks, E.M. 54 Glacier National Park, Montana. From the summit of Trapper Peak: Logging Mountain in the center (photo pem00053), Vulture Peak and Glacier (photo pem00054) to The Guardhouse on the right (photo pem00055). 1913. Photos pem00053, pem00054, pem00055 form a panorama. #1:/Glacier National Park/pem00055 ID. Parks, E.M. 55 Glacier National Park, Montana. From the summit of Trapper Peak: Logging Mountain in the center (photo pem00053), Vulture Peak and Glacier (photo pem00054) to The Guardhouse on the right (photo pem00055). 1913. Photos pem00053, pem00054, pem00055 form a panorama. #1:/Glacier National Park/pem00058 ID. Parks, E.M. 58 Glacier National Park, Montana. Porcupine Ridge, viewed from the highland (Kootenai Peak?) between Valentine Creek and its south fork. The Guardhouse in the center and Jefferson Pass on the left. The heavy limestone showing in the dip slope on the left can be followed by the eye throughout most of the length of Porcupine Ridge. The open park-like country in the foreground affords excellent sites for camps and grass for stock. 1913. Plate 12-A , U.S. Geological Survey Bulletin 600. Photos pem00058 and pem00059 form a panorama. #1:/Glacier National Park/pem00059 ID. Parks, E.M. 59 Glacier National Park, Montana. Porcupine Ridge, viewed from the highland (Kootenai Peak?) between Valentine Creek and its south fork. The Guardhouse in the center and Jefferson Pass on the left. The heavy limestone showing in the dip slope on the left can be followed by the eye throughout most of the length of Porcupine Ridge. The open park-like country in the foreground affords excellent sites for camps and grass for stock. 1913. Plate 12-A , U.S. Geological Survey Bulletin 600. Photos pem00058 and pem00059 form a panorama. #1:/Glacier National Park/pem00063 ID. Parks, E.M. 63 Glacier National Park, Montana. Lower falls of Continental Creek, altitude 4,650 feet. 1913. #1:/Glacier National Park/pem00066 ID. Parks, E.M. 66 Glacier National Park, Montana.M.R. Campbell, writing field notes in camp at Ahern Pass. 1913. #1:/Glacier National Park/pem00069 ID. Parks, E.M. 69 Glacier National Park, Montana. Rainbow Peak and Glacier, viewed from the Continental Divide. 1913. #1:/Glacier National Park/pem00072 ID. Parks, E.M. 72 Glacier National Park, Montana. Abe Mitton climbing along crests northeast of Mount Stanton. 1913. #1:/Glacier National Park/pem00075 ID. Parks, E.M. 75 Glacier National Park, Montana.E.M. Parks on the summit of Mount Cleveland. 1913. #1:/Zion National Park/pet00010 ID. Peterson, F. 10 Zion National Park, Utah. Typical exposures of the Navajo Sandstone (JTn) and Temple Cap Sandstone. The narrow slot-like inner gorge of Zion Canyon is in the red lower part of the Navajo, and the wider upper part of the canyon is in the white part of the Navajo. The red Sinawava Member of the Temple Cap (Jtcs) weathers to form a narrow, tree-covered shelf above the white cliffs of the Navajo and below the white cross-bedded sandstone cliff of the White Throne Member of the Temple Cap (Jtcs). The limestone member of the Carmel Formation slope above the Temple Cap. The Temple Cap is about 52 meters thick. View is north-northwest from Observation Point. Circa 1975. Figure 3, U.S. Geological Survey Professional Paper 1035-B. #1:/Devils Tower National Monument/pfs00078 ID. Parker, F.S. 78 Devils Tower National Monument, Wyoming. Devils Tower, viewed from the west. #1:/Yellowstone National Park/pfs00099 ID. Parker, F.S. 99 Yellowstone National Park, Wyoming. Old Faithful in Upper Geyser Basin in eruption. 1931. #1:/Yellowstone National Park/pfs00100 ID. Parker, F.S. 100 Yellowstone National Park, Wyoming. Grand Canyon of the Yellowstone, viewed from a platform near the lodge. 1931. #1:/Yellowstone National Park/pfs00101 ID. Parker, F.S. 101 Yellowstone National Park, Wyoming. Tower Falls. 1931. #1:/Yellowstone National Park/pfs00103 ID. Parker, F.S. 103 Yellowstone National Park, Wyoming. Lower Yellowstone Falls, viewed from Artist Point. 1931. #1:/Yellowstone National Park/pfs00104 ID. Parker, F.S. 104 Yellowstone National Park, Wyoming. From the summit of Mount Washburn. 1931. Photos pfs00104 and pfs00105 form a panorama. #1:/Yellowstone National Park/pfs00105 ID. Parker, F.S. 105 Yellowstone National Park, Wyoming. From the summit of Mount Washburn. 1931. Photos pfs00104 and pfs00105 form a panorama. #1:/Yellowstone National Park/pfs00107 ID. Parker, F.S. 107 Yellowstone National Park, Wyoming. Bear being fed by a tourist from her room doorway. 1931. #1:/Pardee J.T. Collection/pjt00415 ID. Pardee, J.T. 415 High-grade manganese ore waits at Floy on the Denver & Rio Grande Railroad, for shipment to the east. This ore has been laboriously hauled on soft sandy roads across the desert from the deposits situated from 10 to 20 miles to the south, and represents the collection of many small piles like those shown in 419. The ore pile as shown contains about 150 tons the content of which is about 45% of manganese. La Sal and Moab quadrangles, Grand County, Colorado. May 20, 1918. #1:/Pardee J.T. Collection-C.F.I. Mine/pjt00418 ID. Pardee, J.T. 418 Dry Screening manganese ore fragments from the soil at the C.F.I. mine, southeast of Green River. Much of the manganese ore produced in this region is found as loose fragments that commonly range in size from that of a peanut to that of a base ball. In places these fragments rather closely pave the surface, generally they are mixed with a foot, more or less, of loose sandy soil. These ore fragments were originally parts of a thin horizontal bed of manganese oxides. Lowering of the surface by erosion, in which wind deflation has played a large part, exposed the manganiferous layer that became broken into fragments but was not comminuted sufficiently to be removed by the wind. As the more friable sandstone that adjoins the bed was gradually reduced to fine particles and blown away the manganese fragments remained behind and in places are plentiful enough to cover the surface as a wind polished black pavement. The photograph illustrates the mining method for this ore followed by the Green River Mining Company. The workman at the right is scraping the pebble-laden soil into piles rejecting such pieces of waste. The man in the middle of the view is shoveling the scraped up material against an inclined screen that separates the pebbles from the soil. The man at the left is "cobbing" or hand picking any fragments of sandstone or other waste that may have been caught with the manganese pebbles. La Sal and Moab quadrangles, Grand County, Utah. May 25, 1918. #1:/Pardee J.T. Collection-C.F.I. Mine/pjt00419 ID. Pardee, J.T. 419 Dry screening at the C.F.I. mine. Another view similar to No.418. The cleaned ore is measured with pails and piled on a platform as shown at the right. Thence team and wagon haul it to Floy for shipment on the D. & R.G. Railroad for shipment East. La Sal and Moab quadrangles, Grand County, Utah. May, 25, 1918. #1:/Pardee J.T. Collection-C.F.I. Mine/pjt00421 ID. Pardee, J.T. 421 "Shinnville" - Camp of the Green River Mining Co., at the C.F.I. mine, southeast of Green River, a temporary habitation in the bleak and inhospitable region. The 4-mule team shown is employed continuously supplying the camp with water, the necessary supply of which must be hauled up hill from a spring 6 miles distant. La Sal and Moab quadrangles, Grand County, Utah. May 25, 1918. #1:/Glacier National Park/pjt00673 ID. Pardee, J.T. 673 Glacier National Park, Montana. Glacier Park Lodge and entrance station. July 6, 1921. #1:/Montana Earthquake June 27, 1925/pjt00955 ID. Pardee, J.T. 955 Montana Earthquake June 27, 1925. Joints opened in the limestone cliff near Lombard. July 22, 1925. Plate 11-A, U.S. Geological Survey Professional Paper 147. #1:/Montana Earthquake June 27, 1925/pjt00956 ID. Pardee, J.T. 956 Montana Earthquake June 27, 1925. Limestone cliffs and talus slope east of the Missouri River at Lombard. Lighter streaks on the talus slope represent debris shaken-down by the earthquake. July 22, 1925. Plate 10-B, U.S. Geological Survey Professional Paper 147. #1:/Mount Rainier National Park/pjt01141 ID. Pardee, J.T. 1141 Mount Rainier National Park, Washington. Mount Rainier, viewed from the ridge east of Nisqually Glacier. July 30, 1931. #1:/Mount Rainier National Park/pjt01142 ID. Pardee, J.T. 1142 Mount Rainier National Park, Washington. Nisqually Canyon and the end of Nisqually Glacier in the distance, viewed from the highway to Mount Rainier. July 30, 1931. #1:/Montana Earthquake June 27, 1925/pjt01612 ID. Pardee, J.T. 1612 Montana Earthquake June 27, 1925. Damaged jail at White Sulphur Springs. Note shearing of brick veneer from the back wall. 1925. Plate 6-B, U.S. Geological Survey Professional Paper 147. #1:/Montana Earthquake June 27, 1925/pjt01613 ID. Pardee, J.T. 1613 Montana Earthquake June 27, 1925. Damaged schoolhouse at Manhattan. The separation of partition walls from the outside wall is due to a lack of ties. 1925. Plate 6-A, U.S. Geological Survey Professional Paper 147. #1:/Montana Earthquake June 27, 1925/pjt01615 ID. Pardee, J.T. 1615 Montana Earthquake June 27, 1925. Broken railroad track near Lombard. Note rebound of the broken rail. Photo by J.P. Swartz, 1925. Plate 8A, U.S. Geological Survey Professional Paper 147. #1:/Montana Earthquake June 27, 1925/pjt01616 ID. Pardee, J.T. 1616 Montana Earthquake June 27, 1925. Rocks on the railroad track near Lombard. Photo by J.P. Swartz, 1925. Plate 8-B, U.S. Geological Survey Professional Paper 147. #1:/Peru Earthquake May 31, 1970/pla00008 ID. Plafker, G. 8 Peru Earthquake May 31, 1970. Nevados Huascaran and the Huascaran debris avalanche that destroyed Yungay and Ranrahira. Portion of figure 2, U.S. Geological Survey Circular 639. #1:/Peru Earthquake May 31, 1970/pla00009 ID. Plafker, G. 9 Peru Earthquake May 31, 1970. Nevados Hascaran, showing the area overrun by the upper part of the debris avalanche (outlined by dashed line): Moraines, M, below Glacier 511 and between Rio Shacsha and Quebrada Armapampa, and areas splattered by airborn mud and boulders. June-July 1970. #1:/Peru Earthquake May 31, 1970/pla00010 ID. Plafker, G. 10 Peru Earthquake May 31, 1970. Field west of the Rio Shacsha that was pockmarked by boulders hurled cross the Rio Shacsha valley. Most of the rocks are projectiles derived from the Huascaran debris avalanche. June-July 1970. #1:/Peru Earthquake May 31, 1970/pla00011 ID. Plafker, G. 11 Peru Earthquake May 31, 1970. Impact crater 15 meters long, 11 meters wide, and 2.5 meters deep made by the large light-colored block in the crater which has dimensions of about 2 by 2 by 3 meters. Most of the other rocks, including the large dark-colored one in the crater, are glacial deposits that predate the avalanche. June-July 1970. #1:/Peru Earthquake May 31, 1970. Oct 17, 1989/pla00012 ID. Plafker, G. 12 Peru Earthquake May 31, 1970. Lower part of the Huascaran debris avalanche: Yungay, Ranrahirea, Matacoto, Cemetery Hill in Yungay, overtopped ridge between the Rio Shacsha and Yungay. The combined Yungay and Ranrahirea debris lobes cover an area of about 8 kilometers and probably contain close to 50 million meters of material. June 1970. #1:/Peru Earthquake May 31, 1970/pla00013 ID. Plafker, G. 13 Peru Earthquake May 31, 1970. Site of the Yungay plaza showing the remains of the cathedral walls and four palm trees buried to a depth of 5 meters. The ridge that was overtopped by the Yungay debris lobe is visible in the distance. The wreckage in the right middle ground consists of a smashed bus and truck. June-July 1970. #1:/Peru Earthquake May 31, 1970/pla00014 ID. Plafker, G. 14 Peru Earthquake May 31, 1970. Block of granodiorite estimated to weigh about 7,000 metric tons that was transported by the Huascaran debris avalanche and deposited near the Rio Santa west of Ranrahirca. The top of the block is covered with boulders that were deposited from the debris flow after the block came to rest. This block was left exposed after the enclosing mud flowed and/or was washed away after the avalanche. The pole at the base of the block is 4 meters high. June-July 1970. #1:/Peru Earthquake May 31, 1970/pla00015 ID. Plafker, G. 15 Peru Earthquake May 31, 1970. Up the Rio Santa from 4 miles above Caras, showing the area inundated by the flood wave that originated at the Huascaran debris avalanche. The destructive wave overflowed the banks of the Rio Santa almost continuously to the coast, a distance of about 150 kilometers. June- July 1970. #1:/Peru Earthquake May 31, 1970/pla00016 ID. Plafker, G. 16 Peru Earthquake May 31, 1970. Damage from the flood wave at the power company camp near Huallanca, which is visible in background. The wave, 20 meters deep at this point, swept away homes that formerly covered the level area in this view and deposited a layer of mud and rocks. The fence posts in the foreground are bent in the direction of the flow. June-July 1970. #1:/Peru Earthquake May 31, 1970/pla00017 ID. Plafker, G. 17 Peru Earthquake May 31, 1970. Rotational slide in unconsolidated fluvioglacial sediments east of the Rio Santa at Recuay. A small lake formed behind the toe of the slide which extends obliquely across the river. The headwall scarp of the slide is as much as 10 to 15 meters high. June-July 1970. Figure 14, U.S. Geological Survey Circular 639. #1:/Peru Earthquake May 31, 1970/pla00018 ID. Plafker, G. 18 Peru Earthquake May 31, 1970. Rockslides and debris slides triggered by the earthquake tremors in the vicinity of Caras. June-July 1970. #1:/Peru Earthquake May 31, 1970/pla00019 ID. Plafker, G. 19 Peru Earthquake May 31, 1970. Large rockslide from the north side of Mevados Huascaran that dammed the outlet of upper Llanganuco Lake and buried a party of Czechoslovakian mountaineers. Note the abundant smaller slides, shown as light-colored streaks, along the valley walls in the right foreground and on the slopes of the Cordillera Negra in the background. View is west. June-July 1970. #1:/Peru Earthquake May 31, 1970/pla00020 ID. Plafker, G. 20 Peru Earthquake May 31, 1970. Slumping and fissuring in an irrigated field in the Rio Santa valley near Yungay. Minor slumps such as this caused extensive damage to irrigation works. June-July 1970. #1:/Peru Earthquake May 31, 1970/pla00021 ID. Plafker, G. 21 Peru Earthquake May 31, 1970. Fragmentation of thin saline-cemented crust due to earthquake shaking of a soil mound in the desert inland from Casma. 1970 #1:/Peru Earthquake May 31, 1970/pla00022 ID. Plafker, G. 22 Peru Earthquake May 31, 1970. Part of a fishmeal plant at the Port of Casma that was severely cracked as a result of lateral spreading of the underlying unconsolidated sediments and fill. Note the extension effect on the concrete floor slabs. June-July 1970. #1:/Peru Earthquake May 31, 1970/pla00023 ID. Plafker, G. 23 Peru Earthquake May 31, 1970. Steel truss bridge near Casma that was damaged as a result of lateral spreading of the left abutment toward the river channel (right). The pier has been tilted, and the span on the right has fallen off its rockers and been telescoped beneath the span on the left. Note offset of the bridge deck above the pier. 1970. #1:/Peru Earthquake May 31, 1970/pla00027 ID. Plafker, G. 27 Peru Earthquake May 31, 1970. Flooding of a residential area in southeastern Chimbote where the ground settled substantially because of compaction of water- saturated sediments. 1971. #1:/Peru Earthquake May 31, 1970/pla00028 ID. Plafker, G. 28 Peru Earthquake May 31, 1970. Subsidence of a roadway fill adjacent to the iron ore unloading dock in Chimbote. The fill settled into the weak underlying sediments approximately 1.2 meters at this locality. The dock, which rests on piles driven through the unconsolidated surficial deposits, did not subside. June-July 1970. #1:/Loma Prieta, California, Earthquake October 17, 1989/pla00036 ID. Plafker, G. 36 Loma Prieta, California, Earthquake October 17, 1989. Crack system near Summit Road, half a mile southwest of Highway 17. View is northwest. A wide zone of dominantly extensional cracks passes several feet in front of the house. Figure 10-A, U.S. Geological Survey Circular 1045. #1:/Loma Prieta, California, Earthquake October 17, 1989/pla00037 ID. Plafker, G. 37 Loma Prieta, California, Earthquake October 17, 1989. Crack system near Summit Road, half a mile southwest of Highway 17. View is southeast toward a house showing the driveway dropped down relative to the garage. Figure 10-B, U.S. Geological Survey Circular 1045. #1:/Loma Prieta, California, Earthquake October 17, 1989/pla00038 ID. Plafker, G. 38 Loma Prieta, California, Earthquake October 17, 1989. Crack system near Summit Road, half a mile southeast of Highway 17. As it crosses Summit Road, the crack trends nearly north, rather than northwest, and displays a large component of left-lateral displacement. In general, the upthrown block is on the downhill side of this crack. The swale along the crack on the northeast side of Summit Road ridge in this area suggests similar displacement may have occurred in the past. Figure 10-C, U.S. Geological Survey Circular 1045. #1:/Loma Prieta, California, Earthquake October 17, 1989/pla00039 ID. Plafker, G. 39 Loma Prieta, California, Earthquake October 17, 1989. Cracks through a corral near Summit Road, about 1.1 miles southeast of Highway 17, along the southwest edge of an elongate, closed depression. Cracks are also found along the northeast edge of the same depression. Displacements on both sets of cracks deepened the depression. Figure 11, U.S. Geological Survey Circular 1045. #1:/Loma Prieta, California, Earthquake October 17, 1989/pla00040 ID. Plafker, G. 40 Loma Prieta, California, Earthquake October 17, 1989. Larger of the two cracks that broke Morrill Road by left-lateral motion in both the 1906 San Francisco earthquake and 1989 Loma Prieta earthquake. Shows 1.1 feet of extension, 1.2 feet of left lateral displacement, and 0.3 feet of vertical displacement. The yardstick is aligned in the direction of movement of the opposite sides of the crack. October 18, 1989. Figure 13-B, U.S. Geological Survey Circular 1045. #1:/Loma Prieta, California, Earthquake October 17, 1989/pla00041 ID. Plafker, G. 41 Loma Prieta, California, Earthquake October 17, 1989. Larger of the two cracks that broke Morrill Road by left-lateral motion in both the 1906 San Francisco earthquake and 1989 Loma Prieta earthquake. The view of present-day Morrill Road is similar to 1906 view after the asphalt road had been patched, showing left-lateral displacement of the edge of the road. October 1989. Figure 13-C, U.S. Geological Survey Circular 1045. #1:/Loma Prieta, California, Earthquake October 17, 1989/pla00044 ID. Plafker, G. 44 Loma Prieta, California, Earthquake October 17, 1989. Small rockfall deposit at a road cut, typical of those caused throughout the Santa Cruz Mountains. Figure 21, U.S. Geological Survey Circular 1045. #1:/Loma Prieta, California, Earthquake October 17, 1989/pla00045 ID. Plafker, G. 45 Loma Prieta, California, Earthquake October 17, 1989. Scarps and cracks associated with the movement of deep-seated slumps. Scarp at the head of a block slide in a residential area of Brookdale in the Santa Cruz Mountains. The block slide moved approximately 1.5 feet downslope (to the right). Part of the house to the left of the scarp remained on undisturbed ground while the part to the right moved downslope on a slide block. Figure 22, U.S. Geological Survey Circular 1045. #1:/Loma Prieta, California, Earthquake October 17, 1989/pla00048 ID. Plafker, G. 48 Loma Prieta, California, Earthquake October 17, 1989. Structures damaged in the Marina District of San Franciso. Damage due to ground failure of liquefied fill. Figure 24A, U.S. Geological Survey Circular 1045. #1:/Loma Prieta, California, Earthquake October 17, 1989/pla00049 ID. Plafker, G. 49 Loma Prieta, California, Earthquake October 17, 1989. Structures damaged in the Marina District of San Francisco. The first story of this three-story building was damaged because of liquefaction; the second story collapsed. What is seen is the third story. Figure 24B, U.S. Geological Survey Circular 1045. #1:/Loma Prieta, California, Earthquake October 17, 1989/pla00050 ID. Plafker, G. 50 Loma Prieta, California, Earthquake October 17, 1989. Extension cracks in the Marina District of San Francisco formed by the lateral spreading of a liquefied sandy landfill. Figure 25, U.S. Geological Survey Circular 1045. #1:/Loma Prieta, California, Earthquake October 17, 1989/pla00051 ID. Plafker, G. 51 Loma Prieta, California, Earthquake October 17, 1989. Sand boils formed by liquefaction in the Marina District of San Francisco. Figure 26, U.S. Geological Survey Circular 1045. #1:/Loma Prieta, California, Earthquake October 17, 1989/pla00052 ID. Plafker, G. 52 Loma Prieta, California, Earthquake October 17, 1989. Sand boils at Oakland International Airport. Figure 28, U.S. Geological Survey Circular 1045. #1:/Loma Prieta, California, Earthquake October 17, 1989/pla00053 ID. Plafker, G. 53 Loma Prieta, California, Earthquake October 17, 1989. Sand boils in irrigated fields near Hollister. Figure 29, U.S. Geological Survey Circular 1045. #1:/Loma Prieta, California, Earthquake October 17, 1989/pla00054 ID. Plafker, G. 54 Loma Prieta, California, Earthquake October 17, 1989. Collapsed Cypress viaduct of Interstate 880 in Oakland. The second deck collapsed onto the first deck. Figure 30A, U.S. Geological Survey Circular 1045. #1:/Mesa Verde National Park/pma00084 ID. Pishel, M.A. 84 Mesa Verde National Park, Colorado. Cliff Palace. 1911. #1:/Mesa Verde National Park/pma00085 ID. Pishel, M.A. 85 Mesa Verde National Park, Colorado. Cliff Palace. 1913. #1:/Mesa Verde National Park/pma00087 ID. Pishel, M.A. 87 Mesa Verde National Park, Colorado. Cliff Palace. 1911. #1:/Mesa Verde National Park/pma00088 ID. Pishel, M.A. 88 Mesa Verde National Park, Colorado. Balcony House. 1911. #1:/Mesa Verde National Park/pma00089 ID. Pishel, M.A. 89 Mesa Verde National Park, Colorado. Spruce Tree House. 1911. #1:/Peterson N.P. Collection/pnp00001 ID. Peterson, N.P. 1 Aerial photograph illustrating typical drainage pattern developed in area underlain by Gila conglomerate. Gila County, Arizona.n.d. Figure 2 in U.S. Geological Survey. Professional paper 342. 1962. #1:/North Cascades National Park/post0001 ID. Post, A. 1 Coleman (right) and Roosevelt Glaciers. These severely crevassed, very active ice tongues decend from a common accumulation area on the northwest slopes of Mount Baker (3,285 m). These are examples of glaciers that respond rapidly to small changes in climate. Mount Baker National Forest, Whatcom County, Washington. September 7, 1962. Published as plate 3-A in U.S. Geological Survey. Professional paper 705-A. 1971. #1:/North Cascades National Park/post0002 ID. Post, A. 2 North Cascades National Park, Washington. Klawatti (center) and North Klawatti (right) Glaciers, north of Eldorado Peak. These glaciers have exhibited striking and diverse changes in recent years although they are closely adjacent. In 1947, stagnant ice from both glaciers covered the area of Klawatti Lake. At that time Klawatti Glacier ended on the steep cliff which it now descends in a spectacular icefall. Since 1947, the ice in the basin has melted. The lake, now 1 kilometer in length, has formed, and the Klawatti Glacier has advanced down the cliff. Meanwhile the lower part of North Klawatti Glacier has continued to thin. August 2, 1969. Plate 3-B, U.S. Geological Survey Professional Paper 705-A. 1971. #1:/North Cascades National Park/post0003 ID. Post, A. 3 Chocolate Glacier on the eastern side of Glacier Peak (3,213 m). This very active glacier advanced about 400 m between 1950 and 1955. Since 1955 little change has taken place. The less active North Guardian Glacier immediately north (middle right) did not begin advancing till 1956; since then small gains were made most years till 1968, and the length increased 140 m. These are examples of glaciers tnat are now nearly in equilibrium. Glacier Peak Wilderness, Snohomish County, Washington. September 7, 1962. Published as plate 3-C in U.S. Geological Survey. Professional paper 705-A, 1971. #1:/North Cascades National Park/post0004 ID. Post, A. 4 North Cascades National Park, Washington. Glaciers at the head of Luna Creek in Picket Range. This complex of ice patches illustrates the difficulty of counting and classifying individual glaciers. A glacier fed by ice avalanches ends in Luna Lake on the left. Avalanches from the large irregular hanging glacier that clings to the cliffs feed the debris-covered ice upslope from another lake (foreground, right center). A small ice patch fed by snow avalanches lies at the base of the cliffs in right center. September 27, 1960. Plate 3-D, U.S. Geological Survey Professional Paper 705-A. 1971. #1:/North Cascades National Park/post0005 ID. Post, A. 5 North Cascades National Park, Washington. Boston Glacier. This largest single glacier in the North Cascades occupies a broad cirque northwest of Buckner Mountain (2,777 meters). Its terminus advanced rapidly between 1950 and 1955, and its area increased 17 percent during this period. September 27, 1960. Plate 3-E, U.S. Geological Survey Professional paper 705-A. 1971. #1:/North Cascades National Park/post0006 ID. Post, A. 6 Chickamin Glacier, on the eastern slopes of Dome Peak (2,723 m). This composite valley glacier (left) and slope glacier (right) demonstrates the variations that can take place even in a single ice mass. The tongue at the left has retreated since observations began in 1955, but the terminus on steep cliffs on the right advanced rapidly in the early 1950's and has remained little changed since then. Glacier Peak Wilderness, Skagit County, Washington. September 23, 1965. Published as plate 3-F in U.S. Geological Survey. Professional paper 705-A. 1971. #1:/North Cascades National Park/post0007 ID. Post, A. 7 White Chuck Glacier, south of Glacier Peak. After retreating 430 m between 1949 and 1967, it is now an example of a nearly stagnent glacier. Its mean altitude is 2.145 m. Glacier Peak Wilderness, Snohomish County, Washington. October 16, 1966. Published as plate 3-G in U. S. Geological Survey. Professional paper 705-A. 1971. #1:/North Cascades National Park/post0008 ID. Post, A. 8 Unnamed glacier at the head of May Creek on Jack Mountain (2,721 m). This active glacier is east of the rain shadow formed by the Picket Range. Only small glaciers can be seen on the mountains in the background, many of which exceed 2,700 m in altutude. Pasayten Wilderness, Whatcom County, Washington. September 20, 1966. Published as plate 3-H in U. S. Geological Survey. Professional paper 705-A. 1971. #1:/Post A.S. Collection/post0009 ID. Post, A. 9 Mount Stuart, highest summit in the Wenatchee Mountains. Four small cirque glaciers, with a mean altitude of 2,000 m, are in the north shadow of this spectacular mountain. This region, far east of the Cascade Divide, receives relatively little precipitation, which accounts for the small size of these glaciers. Glacier Peak Wilderness, Whatcom County, Washington. September 20, 1966. #1:/Alaska Glaciers/post0017 ID. Post, A. 17 Alaska Glaciers. Disenchantment Bay and Russell Fiord near Yakutat. The massive Hubbard Glacier, draining an area of approximately 4,000 square kilometers (1,550 square miles) discharges innumerable icebergs into the bay from an ice cliff nearly 100 meters (300 feet) high and 10 kilometers (6 miles) long. The glacier has been slowly advancing since it was mapped in 1895. If the advance continues at the same rate, in a few decades the glacier will close off Russell Fiord (foreground) turning this arm of the sea into a lake 230 square kilometers (90 square miles) in area. Published on sheet 3, U.S. Geological Survey Hydrologic Investigations Atlas 455. 1971. #1:/Alaska Glaciers/post0021 ID. Post, A. 21 Photograph illustrating the effects of an outburst flood due to volcanic activity: changes in glacier on Redoubt Volcano resulting from the eruptions. Steam clouds from the active crater still obsured the summit of the mountain. The ice cascades flowing from the summit crater have been completely destroyed and a large stream of yellowish, debris-laden waterwas rusing down the gorge in its place. Aerial observations in 1967 indicated lowing of the glacier surface level in the crater which suggest that ice melt due to volcanic heat was the principal source of the flood water. Kenai quadrangle, Spurr district, Cook Inlet region, Alaska. August 1966. Published on sheet 3 of U.S. Geological Survey. Hydrological investigations. Atlas HA-455. 1971 #1:/Alaska Glaciers/post0028 ID. Post, A. 28 Alaska Glaciers. Triumvirate Glacier, which is northwest of Tyonek in the Alaska Range. Strand line lake at the upper right edge. n.d. #1:/Alaska/pow00030 ID. Powers, H. 30ct Alaska. Eroded coastline of Adak Island. Circa 1950. #1:/Alaska/pow00066 ID. Powers, H. 66ct Alaska. Coastline of Adak Island. Circa 1950. #1:/Alaska/pow00139 ID. Powers, H. 139ct Alaska. Baked argillite-sill at Nevidiskov Bay on Attu Island. August 14, 1949. #1:/Alaska/pow00153 ID. Powers, H. 153ct Alaska. Beach on an Aleutian island. Circa 1950. #1:/Alaska/pow00154 ID. Powers, H. 154ct Alaska. Beach on an Aleutian island. Circa 1950. #1:/Hawaii Volcanoes National Park/pow00206 ID. Powers, H. 206ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Lava fountain in Aloi Crater. June 1969. #1:/Hawaii Volcanoes National Park/pow00213 ID. Powers, H. 213ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Lava fountains. Aloi Crater in the distance; Alae Crater in the foreground. May 1969. #1:/Hawaii Volcanoes National Park/pow00214 ID. Powers, H. 214ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Aloi Crater and Alae Crater vents. May 1969. #1:/Hawaii Volcanoes National Park/pow00215 ID. Powers, H. 215ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Lava flow of Mauna Ulu. May 1969. #1:/Hawaii Volcanoes National Park/pow00224 ID. Powers, H. 224ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Coarse but pumiceous bombs at Aloi Crater from June 25 and 26, 1969, lava fountains. 1969. #1:/Hawaii Volcanoes National Park/pow00231 ID. Powers, H. 231ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Lava lake at the west end of the Alae-Aloi vent area welling up and fountaining in and out. November 10, 1969. #1:/Hawaii Volcanoes National Park/pow00232 ID. Powers, H. 232ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Small cone built up by fountaining in the Alae-Aloi vent area. November 10, 1969. #1:/Hawaii Volcanoes National Park/pow00233 ID. Powers, H. 233ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Start of fountaining at the west end of the fissure in the Alae-Aloi vent area. November 12, 1969. #1:/Hawaii Volcanoes National Park/pow00235 ID. Powers, H. 235ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Lava cone (pedestal) venting gas in the Alae-Aloi vent area. November 1969. #1:/Hawaii Volcanoes National Park/pow00236 ID. Powers, H. 236ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Fountaining in the lava cone in the Alae-Aloi vent area. November 1969. #1:/Hawaii Volcanoes National Park/pow00239 ID. Powers, H. 239ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Lava fountaining in the Alae-Aloi vent. May 1969. #1:/Hawaii Volcanoes National Park/pow00240 ID. Powers, H. 240ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Small, short-lived lava flows in the Alae-Aloi vent area. November 23, 1969. #1:/Hawaii Volcanoes National Park/pow00241 ID. Powers, H. 241ct Hawaii Volcanoes National Park. Mauna Ulu(?) dome fountaining. Circa 1969. #1:/Hawaii Volcanoes National Park/pow00243 ID. Powers, H. 243ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Lava cascades into Aloi Crater in the early morning. December 30, 1969. #1:/Hawaii Volcanoes National Park/pow00244 ID. Powers, H. 244ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Aloi Crater cascade area after the flows of December 30, 1969. Circa 1970. #1:/Hawaii Volcanoes National Park/pow00245 ID. Powers, H. 245ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Puu Huluhulu, viewed across the partly filled Aloi Crater. January 10, 1970. #1:/Hawaii Volcanoes National Park/pow00246 ID. Powers, H. 246ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Lava fountains in the Alae-Aloi vent area. Circa 1969. #1:/Hawaii Volcanoes National Park/pow00248 ID. Powers, H. 248ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Lava draining down a vent at the east end of the east fissure of Mauna Ulu. Circa 1969. #1:/Hawaii Volcanoes National Park/pow00249 ID. Powers, H. 249ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Looking west at a lava fountain in the west cone of Mauna Ulu. Circa 1969. #1:/Hawaii Volcanoes National Park/pow00253 ID. Powers, H. 253ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Lava stream (flow) from Aloi Crater fissure bubbler. April 1970. #1:/Hawaii Volcanoes National Park/pow00255 ID. Powers, H. 255ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Lava from the fissure of April 9 - April 29, 1970, cascading into Aloi Crater. #1:/Hawaii Volcanoes National Park/pow00258 ID. Powers, H. 258ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Fume and convection clouds about 2 hours after the slow start of fountains. December 30, 1969. #1:/Hawaii Volcanoes National Park/pow00259 ID. Powers, H. 259ct Hawaii Volcanoes National Park. Pele's hair from Kilauea Volcano. Circa 1970. #1:/Hawaii Volcanoes National Park/pow00260 ID. Powers, H. 260ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Lava fountains and lava cascading in Aloi Crater. October 20, 1969. #1:/Hawaii Volcanoes National Park/pow00272 ID. Powers, H. 272ct Hawaii Volcanoes National Park. Floor of Makaopuhi Crater on Kilauea Volcano. March 15, 1966 #1:/Hawaii Volcanoes National Park/pow00277 ID. Powers, H. 277ct Hawaii Volcanoes National Park. 1967-1968 eruption of Kilauea Volcano. Halemaumau fire pit in eruption at night. Photo by R.S. Fiske, November 23, 1967. #1:/Hawaii Volcanoes National Park/pow00281 ID. Powers, H. 281ct Hawaii Volcanoes National Park. 1967-1968 eruption of Kilauea Volcano. Halemaumau fire pit eruption. December 14, 1967. #1:/Hawaii Volcanoes National Park/pow00282 ID. Powers, H. 282ct Hawaii Volcanoes National Park. 1967-1968 eruption of Kilauea Volcano. Refilling of Halemaumau fire pit. 12:45 p.m., December 17, 1967. #1:/Hawaii Volcanoes National Park/pow00286 ID. Powers, H. 286ct Hawaii Volcanoes National Park. 1967-1968 eruption of Kilauea Volcano. Halemaumau fire pit eruption. Lava flows and fountains from the 1921 high rim. View is northwest. 10:15 p.m., December 26, 1967. #1:/Hawaii Volcanoes National Park/pow00291 ID. Powers, H. 291ct Hawaii Volcanoes National Park. 1967-1968 eruption of Kilauea Volcano. Fume clouds in the Halemaumau fire pit, viewed from the southeast. March 13, 1968. #1:/Hawaii Volcanoes National Park/pow00335 ID. Powers, H. 335ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Hornito on the floor of Aloi Crater. Photo by J. Judd, May 21, 1970. #1:/Hawaii Volcanoes National Park/pow00336 ID. Powers, H. 336ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Spatter Aloi Crater fissure eruption. May 24, 1969. #1:/Hawaii Volcanoes National Park/pow00344 ID. Powers, H. 344ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Artesian fountain venting near West Vent(?) cone, flows moving south. May 28, 1970. #1:/Hawaii Volcanoes National Park/pow00353 ID. Powers, H. 353ct Hawaii Volcanoes National Park. 1967-68 eruption of Kilauea Volcano. Lava lakes, levees and islands, viewed from number 9 overlook northwest of the 1919 tunnel. December 5, 1967. #1:/Hawaii Volcanoes National Park/pow00354 ID. Powers, H. 354ct Hawaii Volcanoes National Park. Huluhula cone, viewed across a sulfur-coated steam area from Chain of Craters road. Circa 1966. #1:/Hawaii Volcanoes National Park/pow00355 ID. Powers, H. 355ct Hawaii Volcanoes National Park. Small crack with sulfur deposit. February 1966. #1:/Hawaii Volcanoes National Park/pow00356 ID. Powers, H. 356ct Hawaii Volcanoes National Park. Fissure and sulfur deposits on vegetation. February 1966. #1:/Hawaii Volcanoes National Park/pow00360 ID. Powers, H. 360ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Volcanic bombs. May 26, 1969. #1:/Hawaii Volcanoes National Park/pow00361 ID. Powers, H. 361ct Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Spectacular lava fountain. February 1970. #1:/Alaska/ptl00002 ID. Pewe, T.L. 2ct Alaska. Slumping at Ester Drain on Gold Hill near Fairbanks. September 14, 1949. #1:/Alaska/ptl00008 ID. Pewe, T.L. 8ct Alaska. Volcanic ash layer in silt on Cripple Creek. June 23, 1949. #1:/Alaska/ptl00023 ID. Pewe, T.L. 23ct Alaska. Hanging valley on Resurrection Bay, 2 miles south of Seward. September 30, 1949. #1:/Alaska/ptl00038 ID. Pewe, T.L. 38ct Alaska. Tilted poles on the Northway access road. 1949. #1:/Alaska/ptl00039 ID. Pewe, T.L. 39ct Alaska. Sagging of motor pool garage caused by thawing permafrost at Northway. August 10, 1949. #1:/Alaska/ptl00048 ID. Pewe, T.L. 48ct Alaska. Addition placed above the permafrost-slumped foundation near the University of Alaska. July 2, 1949. #1:/Alaska Glaciers/ptl00629 ID. Pewe, T.L. 629 Alaska Glaciers. Maclaren Glacier, an alpine glacier southeast of Mount Hayes in the Alaska Range, is a retreating glacier with concentric moraine loops in front of the terminus indicating extent of the glacier within the last few centuries. Down-wasting of the glacier has exposed multiple medial moraines. #1:/Alaska/ptl00837 ID. Pewe, T.L. 837 Alaska. Frost-heaved piling of the bridge spanning the outlet of Clearwater Lake, 8 miles southeast of Big Delta. Photo by M.F. Meier, August 15, 1951. Figure 34, U.S. Geological Survey Bulletin 1111-I. #1:/Alaska/ptl00838 ID. Pewe, T.L. 838 Alaska. Deformation by front action of the wood bridge at milepost 456.7 on the Alaska Railroad in Goldstream Valley near Fairbanks. The cross brace has been split by upward thrusting of the pile. The cap beam has been chopped to lower the track after upward movement by frost heaving. February 11, 1954. Figure 45, U.S. Geological Survey Bulletin 1111-I. #1:/Alaska Glaciers/ptl00840 ID. Pewe, T.L. 840 Alaska Glaciers. Columbia Glacier, which is southwest of Valdez, viewed from the entrance of Prince William Sound. The Chugach Range is in the background to the north. The highest peak is Mount Witherspoon, 3,644 meters in elevation. Columbia Glacier has an area of 940 square kilometers. Photo by A.S. Post, August 25, 1965. Figure 4, U.S. Geological Survey Professional Paper 835. #1:/Alaska/ptl00845 ID. Pewe, T.L. 845 Alaska. Raised edge ice wedge polygons on the northern Alaskan sea coast near Barrow. Diameters of the polygons are 7 to 15 meters. August 11, 1966. #1:/Alaska/ptl00849 ID. Pewe, T.L. 849 Alaska. Braided drainage pattern near the junction of the Yukon River and Koyukuk River. The Koyukuk River (dark) joins the silt-laden Yukon River (lighter) at the right. August 24, 1941. Figure 35, U.S. Geological Survey Professional Paper 835. #1:/Phalen W.C. Collection/pwc00295 ID. Phalen, W.C. 295 Showing method of loading salt into freight cars for shipment to plant. Salt Air near Salt Lake City. Salt Lake County, Utah. September 16, 1912. #1:/Phalen W.C. Collection/pwc00296 ID. Phalen, W.C. 296 Demonstrating plowing or harvesting salt in the harvesting ponds, show two ordinary plows, men and horses. Salt Air near Salt Lake City. Salt Lake County, Utah. September 16, 1912. #1:/Phalen W.C. Collection/pwc00297 ID. Phalen, W.C. 297 Inland Crystal Salt Company plant and shipping docks at Salt Air, near Salt Lake City. Salt Lake County, Utah. September 16, 1912. #1:/Phalen W.C. Collection/pwc00302 ID. Phalen, W.C. 302 Tunnel run in 200 feet on Chappell property. Alunite deposits near Marysvale. Piute County, Utah. September 19, 1912. #1:/Phalen W.C. Collection/pwc00314 ID. Phalen, W.C. 314 Composite of photographs 314, 315, and 316 forming a panoramic view of salt diggings of Gunnison Valley Salt Company, near Redmond. Looking from N. 25 degrees W. to N. 65 degrees E. Sevier County, Utah. September 23, 1912. #1:/Phalen W.C. Collection/pwc00315 ID. Phalen, W.C. 315 Composite of photographs 314, 315, and 316 forming a panoramic view of salt diggings of Gunnison Valley Salt Company, near Redmond. Looking from N. 25 degrees W. to N. 65 degrees E. Sevier County, Utah. September 23, 1912. #1:/Phalen W.C. Collection-Nephi Plaster Company/pwc00317 ID. Phalen, W.C. 317 Nephi Plaster Company Gypsum Quarry at entrance to Salt Creek Canyon, on the east edge of town of Nephi. Juab County, Utah. September 25, 1912. #1:/Phalen W.C. Collection/pwc00319 ID. Phalen, W.C. 319 Jackson Brothers, typical country salt plant in an arm of Salt Creek Canyon, 8 miles east of Nephi. Juab County, Utah. September 25, 1912. #1:/Phalen W.C. Collection/pwc00320 ID. Phalen, W.C. 320 Jackson Bros. Salt Spring in an arm of Salt Creek Canyon, near Nephi. Looking south 60 degrees west. Nephi quadrangle. Juab County, Utah. September 25, 1912. #1:/Canada/pwg00172 ID. Pierce, W.G. 172 Canada. Drumlins, probably in T. 5 N., R.29 W., Province of Saskatchewan. September 21, 1932. #1:/Glacier National Park/pwg00194 ID. Pierce, W.G. 194 Glacier National Park, Montana. West from Many Glacier Hotel. Mount Wilbur at right center with the Continental Divide on the skyline. Swiftcurrent Lake in the foreground. August 1932. #1:/Glacier National Park/pwg00197 ID. Pierce, W.G. 197 Glacier National Park, Montana. Southwest from Many Glacier Hotel. Mount Gould at left center, with sill on the left side in The Garden Wall. Swiftcurrent Lake in the foreground. August 1932. #1:/Glacier National Park/pwg00200 ID. Pierce, W.G. 200 Glacier National Park, Montana. North across Lake Josephine toward Altyn Peak in the distant center. August 1932 #1:/Devils Tower National Monument/pwg00201 ID. Pierce, W.G. 201 Devils Tower National Monument, Wyoming. Devils Tower, viewed from the southeast. Igneous rock formations seen to the northwest. September 1932. #1:/Devils Tower National Monument/pwg00202 ID. Pierce, W.G. 202 Devils Tower National Monument, Wyoming. Devils Tower, viewed from the east. Note the columnar jointing and flare at the base. September 1932. #1:/Devils Tower National Monument/pwg00204 ID. Pierce, W.G. 204 Devils Tower National Monument, Wyoming. Devils Tower, viewed from the south. Note the flare of the columnar jointing near the base. September 1932. #1:/Devils Tower National Monument/pwg00205 ID. Pierce, W.G. 205 Devils Tower National Monument, Wyoming. Columnar jointing of Devils Tower on the west side. Note the weathering and jointing cracks in the upper one-fifth of the tower and curvature of the jointing at the base. September 1932. #1:/Grand Teton National Park/pwg00371 ID. Pierce, W.G. 371 Grand Teton National Park, Wyoming. Mount Moran and the Tetons, viewed across Jackson Lake from Moran. September 1935. #1:/Grand Teton National Park/pwg00375 ID. Pierce, W.G. 375 Grand Teton National Park, Wyoming. Across Jackson Lake toward the Teton Mountains, viewed from the monument. September 1935. #1:/Pierce W.G. Collection/pwg00381 ID. Pierce, W.G. 381 Cross sectional view of the South Sunshine anticline looking south across Gooseberry Creek from center of SE 1/4 sec. 4, T.46 N.,R. 101 W. The oldest formation exposed is Morrison. The Cloverly formation forms the prominent scarps which outline the anticline. The peaks on the skyline are of volcanic rock. Park County, Wyoming. September 1935. Figure 13 in U.S. Geological Survey. Bulletin 921. 1940. #1:/Russell Collection/raj00001 ID. Russell, A.J. 1 A.J. Russell Collection. Granite Rock, Buford Station, Laramie Mountains, Wyoming Territory. Circa 1868 #1:/Russell Collection/raj00002 ID. Russell, A.J. 2 A.J. Russell Collection. Dial Rock, Red Buttes, Laramie Plains, Wyoming Territory. Circa 1868. #1:/Russell Collection/raj00003 ID. Russell, A.J. 3 A.J. Russell Collection. High bluffs, Black Buttes, Wyoming Territory. Circa 1868. #1:/Russell Collection/raj00004 ID. Russell, A.J. 4 A.J. Russell Collection. Burning Rock Cut, Green River Valley, Wyoming Territory. Circa 1868. #1:/Russell Collection/raj00005 ID. Russell, A.J. 5 A.J. Russell Collection. Citadel Rock, Green River Valley, Wyoming Territory. Circa 1868. #1:/Russell Collection/raj00006 ID. Russell, A.J. 6 A.J. Russell Collection. Castle Rock, Green River Valley, Wyoming Territory. Circa 1868. #1:/Russell Collection/raj00007 ID. Russell, A.J. 7 A.J. Russell Collection. Church Buttes, near Fort Bridger, Wyoming Territory. Circa 1868. #1:/Russell Collection/raj00008 ID. Russell, A.J. 8 A.J. Russell Collection. Lake at the head of Bear River, Uinta Mountains, Utah Territory. Circa 1868. #1:/Russell Collection/raj00009 ID. Russell, A.J. 9 A.J. Russell Collection. Conglomerate Peaks of Echo, Utah Territory. Circa 1868. #1:/Russell Collection/raj00010 ID. Russell, A.J. 10 A.J. Russell Collection. Sentinel Rock, Echo Canon, Utah Territory. Circa 1868. #1:/Russell Collection/raj00011 ID. Russell, A.J. 11 A.J. Russell Collection. Hanging Rock, Echo City, Utah Territory. Circa 1868. #1:/Russell Collection/raj00012 ID. Russell, A.J. 12 A.J. Russell Collection. Coalville, Weber Valley, Utah Territory. Circa 1868. #1:/Russell Collection/raj00013 ID. Russell, A.J. 13 A.J. Russell Collection. Thousand Mile Tree, Wilhelmina's Pass, Utah Territory. Circa 1868. #1:/Russell Collection/raj00014 ID. Russell, A.J. 14 A.J. Russell Collection. Serrated rocks or Devil's Slide, Wilhelmina's Pass, Weber Canon, Utah Territory. Circa 1868. #1:/Russell Collection/raj00015 ID. Russell, A.J. 15 A.J. Russell Collection. Serrated rocks or Devil's Slide, Weber Canon, Utah Territory. Circa 1868. #1:/Russell Collection/raj00016 ID. Russell, A.J. 16 A.J. Russell Collection. Devil's Gate, Weber Canon, Wasatch Mountains, Utah Territory. Circa 1868. #1:/Russell Collection/raj00017 ID. Russell, A.J. 17 A.J. Russell Collection. Bitter Creek Valley, Wyoming Territory. Circa 1868. Photos raj00017 and raj00018 form a panorama. #1:/Russell Collection/raj00018 ID. Russell, A.J. 18 A.J. Russell Collection. Bitter Creek Valley, Wyoming Territory. Circa 1868. Photos raj00017 and raj00018 form a panorama. #1:/Russell Collection/raj00019 ID. Russell, A.J. 19 A.J. Russell Collection. Carmichael's Camp, Bitter Creek Valley, Wyoming Territory. Circa 1868. Photos raj00019 and raj00020 form a panorama. #1:/Russell Collection/raj00020 ID. Russell, A.J. 20 A.J. Russell Collection. Carmichael's Camp, Bitter Creek Valley, Wyoming Territory. Circa 1868. Photos raj00019 and raj00020 form a panorama. #1:/Russell Collection/raj00021 ID. Russell, A.J. 21 A.J. Russell Collection. Granite Canon Embankment, Carmichael's Cut, Wyoming Territory. Circa 1868. #1:/Russell Collection/raj00022 ID. Russell, A.J. 22 A.J. Russell Collection. Miller and Patterson's work, cut no.5, near Red Buttes, Wyoming Territory. Circa 1868. #1:/Russell Collection/raj00023 ID. Russell, A.J. 23 A.J. Russell Collection. Devil's Gate, Dale Creek Canon, near silver mines, Utah Territory. Circa 1868. #1:/Russell Collection/raj00024 ID. Russell, A.J. 24 A.J. Russell Collection. Entering Black Hills, Carmichael's Cut, Granite Canon, Wyoming Territory. Circa 1868. #1:/Russell Collection/raj00025 ID. Russell, A.J. 25 A.J. Russell Collection. Lime Kiln Cut near Granite Canon, Wyoming Territory. Circa 1868. #1:/Russell Collection/raj00026 ID. Russell, A.J. 26 A.J. Russell Collection. Salt Lake Valley, east from Corrinne, Utah Territory. Brigham City in the distance. Circa 1868. #1:/Russell Collection/raj00027 ID. Russell, A.J. 27 A.J. Russell Collection. Zion's Cooperative Mercantile Institution (in which Brigham Young has an interest), Salt Lake City, Utah Territory. Circa 1868. #1:/Russell Collection/raj00028 ID. Russell, A.J. 28 A.J. Russell Collection. Looking down into Ripple Lake from Mount Emma, California. Circa 1868. #1:/Russell Collection/raj00029 ID. Russell, A.J. 29 A.J. Russell Collection. Old sawmill, Parley's Park, Uinta Mountains, Utah Territory. Circa 1868. #1:/Russell Collection/raj00030 ID. Russell, A.J. 30 A.J. Russell Collection. Looking down Echo Canon from Death's Rock, Utah Territory. Circa 1868. #1:/Russell Collection/raj00031 ID. Russell, A.J. 31 A.J. Russell Collection. Tunnel no. 2, head of Echo, Utah Territory. Circa 1868. #1:/Russell Collection/raj00032 ID. Russell, A.J. 32 A.J. Russell Collection. Moore's Lake, head of Bear River, Uinta Mountains, Utah Territory. Circa 1868. #1:/Russell Collection/raj00033 ID. Russell, A.J. 33 A.J. Russell Collection. Skull Rock (granite), Sherman Station, Laramie Mountains, Wyoming Territory. Circa 1868. #1:/Russell Collection/raj00034 ID. Russell, A.J. 34 A.J. Russell Collection. Malloy's Cut, Sherman Station, Laramie Range, Wyoming Territory. Circa 1868. #1:/Russell Collection/raj00035 ID. Russell, A.J. 35 A.J. Russell Collection. Tunnel no. 3, Weber Canon, Utah Territory. Circa 1868. #1:/Russell Collection/raj00036 ID. Russell, A.J. 36 A.J. Russell Collection. City Creek Canon, Wasatch Mountains, Salt Lake Valley, Utah Territory. Circa 1868. #1:/Russell Collection/raj00037 ID. Russell, A.J. 37 A.J. Russell Collection. Summit of Sierra Nevada, California. Snow sheds in the foreground. Donner Lake in the distance. Central Pacific Railroad. Circa 1868. #1:/Russell Collection/raj00038 ID. Russell, A.J. 38 A.J. Russell Collection. Union Pacific Railroad Laramie Machine Shops, viewed from the windmill, Wyoming Territory. Circa 1868. #1:/Russell Collection/raj00039 ID. Russell, A.J. 39 A.J. Russell Collection. Uinta Mountains, east of Bridger, Wyoming Territory. Circa 1868. #1:/Russell Collection/raj00040 ID. Russell, A.J. 40 A.J. Russell Collection. Weber Canon, Utah Territory. Circa 1868. #1:/Russell Collection/raj00041 ID. Russell, A.J. 41 A.J. Russell Collection. Utah Territory. No information provided. Circa 1868. #1:/Russell A.J. Collection/raj00042 ID. Russell, A.J. 42 No caption. Utah Territory. ca. 1868. #1:/Ross C.P. Collection/rcp00003 ID. Ross, C.P. 3ct Close-up of Precambrian slate above Ouray. Ouray County, Colorado.n.d. #1:/Ross C.P. Collection/rcp00384 ID. Ross, C.P. 384ct Sinkhole in Devils River limestone near Waldron camp. Brewster County, Texas.n.d. #1:/Idaho/rcp00851 ID. Ross, C.P. 851ct Idaho. Prichard slate near Wallace. July 23, 1947. #1:/Glacier National Park/rcp02315 ID. Ross, C.P. 2315 Glacier National Park, Montana. "Molar tooth" structures, exposed in road cuts northwest of Logan Pass. August 27, 1950. Figure 129, U.S. Geological Survey Professional Paper 294-K. #1:/Glacier National Park/rcp02316 ID. Ross, C.P. 2316 Glacier National Park, Montana. Inclusion-like patterns in Siyeh Limestone, exposed in road cuts northwest of Logan Pass. August 27, 1950. Figure 128, U.S. Geological Survey Professional Paper 294-K. #1:/Glacier National Park/rcp02317 ID. Ross, C.P. 2317 Glacier National Park, Montana. Conophyton inclinatum in Siyeh Limestone at the road cut above the big switchback on Going-to-the-Sun Highway. August 27, 1950. Figure 10, U.S. Geological Survey Professional Paper 296. #1:/Glacier National Park/rcp02319 ID. Ross, C.P. 2319 Glacier National Park, Montana. Mount Oberlin, viewed from near Going-to-the Sun Highway. August 27, 1950. #1:/Glacier National Park/rcp02325 ID. Ross, C.P. 2325 Glacier National Park, Montana. Stromatolites. Photo by S. Nording, August 28, 1950. #1:/Glacier National Park/rcp02328 ID. Ross, C.P. 2328 Glacier National Park, Montana. Stromatolites. Photo by S. Nording, August 28, 1950. #1:/Glacier National Park/rcp02357 ID. Ross, C.P. 2357 Glacier National Park, Montana. Mount Kipp, viewed from Station 83 on Flattop Mountain. August 2, 1950. #1:/Glacier National Park/rcp02362 ID. Ross, C.P. 2362 Glacier National Park, Montana. Nahsukin Mountain, viewed from near Station 93 on West Flattop Mountain. August 3, 1950. #1:/Glacier National Park/rcp02365 ID. Ross, C.P. 2365 Glacier National Park, Montana. Conglomerate in Grinnell Argillite at Station 106 on Boundary Creek. August 5, 1950. #1:/Devils Tower National Monument/rcs00001 ID. Robinson, C.S. 1 Devils Tower National Monument, Wyoming. Northwest side of Devils Tower. The columns taper or converge and in places unite near the top and are cut by numerous cross fractures. 1954. Figure 53-A, U.S. Geological Survey Bulletin 1021-I. #1:/Devils Tower National Monument/rcs00002 ID. Robinson, C.S. 2 Devils Tower National Monument, Wyoming. South side of Devils Tower. The columns flare out and merge to form the massive base. 1954. Figure 53-B, U.S. Geological Survey Bulletin 1021-I. #1:/Rickert Collection/rda00002 ID. Rickert, D.A. 2 Sediment accumulation, the most common problem of real-estate lakes, can turn lakes into mudflats. Photo courtesy U.S. Soil Conservation Service. United States.n.d. Figure 1 in U.S. Geological Survey. Circular 601-G. 1971. #1:/Rickert D.A. Collection/rda00004 ID. Rickert, D.A. 4 Sediment removal is expensive; at Lake Barcroft, over $300,000 was spent in just 10 years. Drag-line at work. Photo courtesy U.S. Soil Conservation Service. Fairfax County, Virginia.n.d. Figure 3 in U.S. Geological Survey. Circular 601-G. 1971. #1:/Mesa Verde National Park/rdh00014 ID. Radbruch-Hall, D.H. 14 Mesa Verde National Park, Colorado. Stress release joints at Mesa Verde. Joints parallel the canyon wall. Figure 5, U.S. Geological Survey Professional Paper 1183, 1982. #1:/Radburch-Hall Collection/rdh00015 ID. Radburch-Hall, D.H. 15 Earthflows in weathered surface debris. West Virginia.n.d. Figure 6 in U.S. Geological Survey. Professional paper 1183. 1982. #1:/San Juan Mountains/rdh00018 ID. Radburch-Hall, D.H. 18 San Juan Mountains, Colorado. Recent debris flow in Cunningham Gulch on one edge of a fan constructed by many such flows in the past. Photo by D.J. Varnes. #1:/Hawaii Volcanoes National Park/rdh00034 ID. Richter, D.H. 34 Hawaii Volcanoes National Park. 1959 eruption of Kilauea Volcano, first phase of activity in Kilauea Iki Crater. Braided lava cascades down the crater wall to the lava river, the main cascade, and the lava lake, viewed from Byron Ledge overlook. Fume rises from the fountain and from the dead vents. On the north wall of the crater, a number of forest fires sweep up the slope. Photo by U.S. National Park Service, November 15, 1959. Figure 7, U.S. Geological Survey Professional Paper 537-E. Compare with photo rdh00079 taken after activity ceased. #1:/Hawaii Volcanoes National Park/rdh00035 ID. Richter, D.H. 35 Hawaii Volcanoes National Park. 1959 eruption of Kilauea Volcano, first phase of activity in Kilauea Iki Crater. Main fountain, lava river, cascades, and lava lake, viewed from the west end of Kilauea Iki Crater overlook. The main fountain, about 150 feet high, feeds the incised lava cascade that pours down the steep slope to the river. Note the extreme turbulence at the base of the cascade. 3:00 p.m., November 16, 1959. Figure 8 (top photo), U.S. Geological Survey Professional Paper 537-E. #1:/Hawaii Volcanoes National Park/rdh00037 ID. Richter, D.H. 37 Hawaii Volcanoes National Park. 1959 eruption of Kilauea Volcano, first phase of activity in Kilauea Iki Crater. Increased fountaining in the crater and a higher river bed raised by numerous overflows along its banks. Note the lava river disappearing in the crusted-over channel and reappearing farther downstream as an incandescent sheet. Lava fountain on the left. #1:00 p.m., November 17, 1959. Figure 9, U.S. Geological Survey Professional Paper 537-E. #1:/Hawaii Volcanoes National Park/rdh00039 ID. Richter, D.H. 39 Hawaii Volcanoes National Park. 1959 eruption of Kilauea Volcano, first phase of activity in Kilauea Iki Crater. Development of a 850-foot lava fountain with greatly increased lava output and the rise of a 130-foot deep lava lake, viewed from Byron Ledge overlook. 5:30 p.m., November 18, 1959. Figure 10 (middle left), U.S. Geological Survey Professional Paper 537-E. #1:/Hawaii Volcanoes National Park/rdh00045 ID. Richter, D.H. 45 Hawaii Volcanoes National Park. 1959 eruption of Kilauea Volcano, first phase of activity in Kilauea Iki Crater. Fountain and cone in the crater, viewed from the north end of Byron Ledge, showing prominent slump features along the inner face of the cone. Early afternoon, November 20, 1959. Figure 12, U.S. Geological Survey Professional Paper 537-E. #1:/Hawaii Volcanoes National Park/rdh00046 ID. Richter, D.H. 46 Hawaii Volcanoes National Park. 1959 eruption of Kilauea Volcano, first phase of activity in Kilauea Iki Crater. Fountain and lava lake during the last day of the first phase, viewed from Kilauea Iki Crater overlook. Relatively small fountain with ejecta falling directly upon the lake surface. 12:30 p.m., November 21, 1959. Figure 13 (top), U.S. Geological Survey Professional Paper 537-E. See also photo rdh00047. #1:/Hawaii Volcanoes National Park/rdh00047 ID. Richter, D.H. 47 Hawaii Volcanoes National Park. 1959 eruption of Kilauea Volcano, first phase of activity in Kilauea Iki Crater. Fountain and lake during the last day of the first phase, viewed from Kilauea Iki Crater overlook. Exceptionally level surface of the 330-foot deep lava lake. Lighter areas and bands are fluid lava oozing and squeezing up around foundering plates of the crust on the continually reworked surface. #1:00 p.m., November 21, 1959. Figure 13 (bottom), U.S. Geological Survey Professional Paper 537-E. See also photo rdh00046. #1:/Hawaii Volcanoes National Park/rdh00050 ID. Richter, D.H. 50 Hawaii Volcanoes National Park. 1959 eruption of Kilauea Volcano, third phase of activity in Kilauea Iki Crater. High fountain, viewed from Kilauea Iki Crater overlook. Inclined jets shoot to 1400 feet, and pumice is being wafted even higher. Blobs of spatter litter the road near the guardrail. 9:00 a.m., November 29, 1959. Figure 15 (bottom), U.S. Geological Survey Professional Paper 537-E. #1:/Hawaii Volcanoes National Park/rdh00051 ID. Richter, D.H. 51 Hawaii Volcanoes National Park. 1959 eruption of Kilauea Volcano, third phase of activity in Kilauea Iki Crater. Small incandescent tongues of very fluid lava flowing into the west bay of the crater from the base of the fountain. View is from Byron Ledge. 9:00 p.m., November 28, 1959. Figure 16, U.S. Geological Survey Professional Paper 537-E. #1:/Hawaii Volcanoes National Park/rdh00052 ID. Richter, D.H. 52 Hawaii Volcanoes National Park. 1959 eruption of Kilauea Volcano, third phase of activity in Kilauea Iki Crater. Reduced fountain deflected northward by the collapse of the inner part of the cone in the crater. Note the new cone developing on the left shoulder of the old main cone (immediately to the right of the fountain). View is from the trail leading down to Byron Ledge. 8:00 a.m., November 29, 1959. Figure 17, U.S. Geological Survey Professional Paper 537-E. #1:/Hawaii Volcanoes National Park/rdh00053 ID. Richter, D.H. 53 Hawaii Volcanoes National Park. 1959 eruption of Kilauea Volcano, third phase of activity in Kilauea Iki Crater. Pumice blanket, southwest of the cone, on buried Crater Rim Road (cleared area between denuded ohia trees). The main cone (in the center) is about 2,000 feet away; the small east cone is behind the trees on the right. November 30, 1959. Figure 18, U.S. Geological Survey Professional Paper 537-E. #1:/Hawaii Volcanoes National Park/rdh00054 ID. Richter, D.H. 54 Hawaii Volcanoes National Park. 1959 eruption of Kilauea Volcano, third phase of activity in Kilauea Iki Crater. Pumice blanket in the Summer Camp area 3,000 feet southwest of a vent. Forty inches of pumice cover the ground. November 30, 1959. Figure 19 (top photo), U.S. Geological Survey Professional Paper 537-E. Compare with photo rdh00055. #1:/Hawaii Volcanoes National Park/rdh00055 ID. Richter, D.H. 55 Hawaii Volcanoes National Park. 1959 eruption of Kilauea Volcano, eleventh phase of activity in Kilauea Iki Crater. Pumice blanket in the Summer Camp area 3,000 feet southwest of the vent. The total pumice depth is about 55 inches. December 15, 1959. Figure 19 (bottom photo), U.S. Geological Survey Professional Paper 537-E. Compare with photo rdh00054. #1:/Hawaii Volcanoes National Park/rdh00058 ID. Richter, D.H. 58 Hawaii Volcanoes National Park. 1959 eruption of Kilauea Volcano, fourth phase of activity in Kilauea Iki Crater. High, exceptionally level lava lake and relatively small fountain just prior to the period of backflow concurrent with fountaining. The crust of the lake is continually foundering and reforming. View is from Byron Ledge overlook. 6:30 a.m., December 5, 1959. Figure 21, U.S. Geological Survey Professional Paper 537-E. #1:/Hawaii Volcanoes National Park/rdh00059 ID. Richter, D.H. 59 Hawaii Volcanoes National Park. 1959 eruption of Kilauea Volcano, fourth phase of activity in Kilauea Iki Crater. A steady stream of lake lava flows westward into the small circular pond over the vent. The lake level is approximately 15 feet below the high mark of a few hours earlier. View is from the north end of Byron Ledge. Photo by the National Park Service, late morning, December 5, 1959. Figure 22, U.S. Geological Survey. Professional Paper 537-E. #1:/Hawaii Volcanoes National Park/rdh00060 ID. Richter, D.H. 60 Hawaii Volcanoes National Park. 1959 eruption of Kilauea Volcano, sixth phase of activity in Kilauea Iki Crater. Low, broad fountain and spatter-fed flows cascading down the flanks of the cone. Note the waves forming on the lake at the base of the fountain. View is from the north end of Byron Ledge. 1#1:30 p.m., December 7, 1959. Figure 23, U.S. Geological Survey Professional Paper 537-E. #1:/Hawaii Volcanoes National Park/rdh00061 ID. Richter, D.H. 61 Hawaii Volcanoes National Park. 1959 eruption of Kilauea Volcano, seventh phase of activity in Kilauea Iki Crater. Three-foot, spatter-encrusted, cored lava bomb where it fell on the east side of the cone. Photo by R.T. Haugen, National Park Service, 1959. Figure 24, U.S. Geological Survey Professional Paper 537-E. #1:/Hawaii Volcanoes National Park/rdh00065 ID. Richter, D.H. 65 Hawaii Volcanoes National Park. 1959 eruption of Kilauea Volcano, eighth phase of activity in Kilauea Iki Crater. Area on the rim of the crater opposite a vent deluged by spatter. Denuded and burned ohia trees on the rim of the main crater wall almost 1,000 feet from the vent. December 11, 1959. Figure 27 (top photo), U.S. Geological Survey Professional Paper 537-E. See also photo rdh00066. #1:/Hawaii Volcanoes National Park/rdh00066 ID. Richter, D.H. 66 Hawaii Volcanoes National Park. 1959 eruption of Kilauea Volcano, eighth phase of activity in Kilauea Iki Crater. Area on the rim of the crater opposite a vent deluged by spatter. Denuded and burned ohia trees on the rim of the main crater wall almost 1,000 feet from the vent and spatter draped in burned ohia trees. Photo by the National Park Service, December 11, 1959. Figure 27 (bottom photo), U.S. Geological Survey Professional Paper 537-E. See also photo rdh00065. #1:/Hawaii Volcanoes National Park/rdh00069 ID. Richter, D.H. 69 Hawaii Volcanoes National Park. 1959 eruption of Kilauea Volcano, tenth phase of activity in Kilauea Iki Crater. Fountain and lava lake, viewed from the west end of Kilauea Iki Crater overlook, showing development of lava waves at the base of a fountain in a high lava lake. December 14, 1959. Figure 30, U.S. Geological Survey Professional Paper 537-E. #1:/Hawaii Volcanoes National Park/rdh00073 ID. Richter, D.H. 73 Hawaii Volcanoes National Park. 1959 eruption of Kilauea Volcano, fourteenth phase of activity in Kilauea Iki Crater. Fountain, viewed from Byron Ledge overlook, seventeen minutes before activity ceased. The copious outpouring from the vent sweeps across the lake surface as one flow unit. 3:35 a.m., December 17, 1959. Figure 33, U.S. Geological Survey Professional Paper 537-E. #1:/Hawaii Volcanoes National Park/rdh00074 ID. Richter, D.H. 74 Hawaii Volcanoes National Park. 1959 eruption of Kilauea Volcano, fifteenth phase of activity in Kilauea Iki Crater. Development of a 1900-foot-high fountain, viewed from the crater rim opposite the vent. A small lava boil in the vent during early stages of the phase. A stream of lake lava continues to flow back toward the vent. #1:45 p.m., December 17, 1959. Figure 34 (top photo), U.S. Geological Survey Professional Paper 537-E. Photos rdh00074, rdh00075, and rdh00076 form a sequence. #1:/Hawaii Volcanoes National Park/rdh00075 ID. Richter, D.H. 75 Hawaii Volcanoes National Park. 1959 eruption of Kilauea Volcano, fifteenth phase of activity in Kilauea Iki Crater. Development of a 1900-foot-high fountain, viewed from the crater rim opposite the vent. A fountain roars out of the vent and is splashing the entire vent area with liquid spatter. #1:55, p.m., December 17, 1959. Figure 34 (bottom photo), U.S. Geological Survey Professional Paper 537-E. Photos rdh00074, rdh00075, and rdh00076 form a sequence. #1:/Hawaii Volcanoes National Park/rdh00076 ID. Richter, D.H. 76 Hawaii Volcanoes National Park. 1959 eruption of Kilauea Volcano, fifteenth phase of activity in Kilauea Iki Crater. The 1900-foot-high fountain, viewed from the USGS Hawaiian Volcano Observatory. The top of the fountain is inside the pushed-up cloud bank, and tremendous quantities of pumice rain out of the dark cloud on the right of the fountain. 2:05 p.m., December 17, 1959. Figure 35, U.S. Geological Survey Professional Paper 537-E. Photos rdh00074, rdh00075, and rdh00076 form a sequence. #1:/Hawaii Volcanoes National Park/rdh00077 ID. Richter, D.H. 77 Hawaii Volcanoes National Park. 1959 eruption of Kilauea Volcano, fifteenth phase of activity in Kilauea Iki Crater. Cone and the end of the road west of Kilauea Iki Crater overlook immediately after the 1900-foot-high fountain. Note the large masses of spatter lying on road. Afternoon, December 17, 1959. Figure 36, U.S. Geological Survey Professional Paper 537-E. See also photos rdh00074, rdh00075, and rdh00076. #1:/Hawaii Volcanoes National Park/rdh00079 ID. Richter, D.H. 79 Hawaii Volcanoes National Park. 1959 eruption of Kilauea Volcano, third phase of activity in Kilauea Iki Crater. The black ledge, 50 to 200 feet wide and approximately 50 feet high, surrounds the entire lake. The vent and the largest island continue to emit fume. View is from Byron Ledge overlook after activity ceased. Photo by R.T. Haugen, National Park Service, December 2, 1959. Figure 38, U.S. Geological Survey Professional Paper 537-E. Compare with photo rdh00034 taken on the second day of the eruption. #1:/Hawaii Volcanoes National Park/rdh00080 ID. Richter, D.H. 80 Hawaii Volcanoes National Park. 1959 eruption of Kilauea Volcano. Strong emanation of fume from the vent in Kilauea Iki Crater, two days after cessation of all activity. Lava flows in the foreground are from the seventeenth phase of activity. December 22, 1959. Figure 39 (top photo), U.S. Geological Survey Professional Paper 537-E. #1:/Hawaii Volcanoes National Park/rdh00081 ID. Richter, D.H. 81 Hawaii Volcanoes National Park. 1959 eruption of Kilauea Volcano. Only minor fume emission from the vent in Kilauea Iki Crater. Dense lava coating the wall has already begun to spall off. The vent is 100 feet across, its greatest dimension. December 24, 1959. Figure 39 (bottom photo), U.S. Geological Survey Professional Paper 537-E. #1:/Hawaii Volcanoes National Park/rdh00085 ID. Richter, D.H. 85 Hawaii Volcanoes National Park. 1960 eruption of Kilauea Volcano. Steam and ash production from the early vents. A violent steam emission is caused by ground water rushing into the subsurface eruptive conduits. The darker steam cloud is choked with fine ash particles. 7:00 a.m., January 14, 1960. Figure 44 (top photo), U.S. Geological Survey Professional Paper 537-E. See also photo rdh00086. #1:/Hawaii Volcanoes National Park/rdh00086 ID. Richter, D.H. 86 Hawaii Volcanoes National Park. 1960 eruption of Kilauea Volcano. Steam and ash production from the early vents. Violent steam emission and adjacent moderate lava fountaining. Note the volcanic debris carried high into the steam cloud. 10:00 a.m., January 14, 1960. Figure 44 (bottom photo), U.S. Geological Survey Professional Paper 537-E. See also photo rdh00085. #1:/Hawaii Volcanoes National Park/rdh00091 ID. Richter, D.H. 91 Hawaii Volcanoes National Park. 1960 eruption of Kilauea Volcano. Steam clouds rise over the lava front at the ocean. In the background, under the wing of the plane, the lava fountains and fume cloud are visible. January 15, 1960. Figure 48 (top photo), U.S. Geological Survey Professional Paper 537-E. #1:/Hawaii Volcanoes National Park/rdh00092 ID. Richter, D.H. 92 Hawaii Volcanoes National Park. 1960 eruption of Kilauea Volcano. Fountains and cone showing the lava river pouring from a breach in the cone and flowing against the Koae fault scarp north of the cone. January 15, 1960. Figure 48 (bottom photo), U.S. Geological Survey Professional Paper 537-E. #1:/Hawaii Volcanoes National Park/rdh00120 ID. Richter, D.H. 120 Hawaii Volcanoes National Park. 1960 eruption of Kilauea Volcano. Early collapse features in Halemaumau Crater. Scarp encircling the floor of the crater marks the outer limit of saucer-shaped subsidence. Steam rises from the periphery of the central collapse pit, which is partially filled with re- extruded 1952 lava. Note the wormlike pressure ridges crisscrossing the floor. The diameter of the central collapse pit is about 1,000 feet. February 9, 1960. Figure 78 (top photo), U.S. Geological Survey Professional Paper 537-E. #1:/Glacier Bay National Park and Preserve/rdl00010 ID. Rossman, D.L. 10 Glacier Bay National Park and Preserve, Alaska. Hugh Miller Inlet. Inclusions of dark rock are believed to be recrystallized volcanic material in diorite. Relations of inclusions to diorite show that both active intrusion and replacement of dark rock by diorite have taken place. Dark inclusions probably represent later additions to the melt and hence are not so thoroughly "digested." Circa 1950. Figure 11 (upper photo), U.S. Geological Survey Bulletin 1121-K. #1:/Glacier Bay National Park and Preserve/rdl00011 ID. Rossman, D.L. 11 Glacier Bay National Park and Preserve, Alaska. Hugh Miller Inlet. A different view of inclusions of dark rock believed to be recrystallized volcanic material in diorite. Relations of inclusions to diorite show that both active intrusion and replacement of dark rock by diorite have taken place. Dark inclusions probably represent later additions to the melt and hence are not so thoroughly "digested." Circa 1950. Figure 11 (lower photo), U.S. Geological Survey Bulletin 1121-K. #1:/Glacier Bay National Park and Preserve/rdl00012 ID. Rossman, D.L. 12 Glacier Bay National Park and Preserve, Alaska. Hugh Miller Inlet. Inclusions of dark rock believed to be recrystallized volcanic material in diorite. Relations of inclusions to diorite show that both active intrusion and replacement of dark rock by diorite have taken place. The dark inclusions probably represent later additions to the melt and, hence, are not so thoroughly "digested." Circa 1950. Figure 12 (upper photo), U.S. Geological Survey Bulletin 1121-K. #1:/Yellowstone National Park/ret00002 ID. Ruppel, E.T. 2ct Yellowstone National Park, Wyoming. Electric Peak, showing outcrops of Cretaceous sedimentary rocks. Rocks in the foreground are Frontier Sandstone. Those on the crest of Electric Peak are Eagle Sandstone. View is northeast from the vicinity of the head of Fan Creek in the Gallatin Range. 1967. Figure 10, U.S. Geological Survey Professional Paper 729-A. #1:/Yellowstone National Park/ret00003 ID. Ruppel, E.T. 3ct Yellowstone National Park, Wyoming. Roof of the Indian Creek laccolith northeast of Gallatin Lake, looking northeast. Laccolith underlies slide rock- covered slope in lower part of the photograph, beneath prominent cliff of Pilgram Limestone. Snow-capped peak left of center is Bannock Peak, underlain mainly by the Madison Group. Timbered, cliffy slope near the right edge is the south face of Quadrant Mountain. 1967. #1:/Yellowstone National Park/ret00201 ID. Ruppel, E.T. 201 Yellowstone National Park, Wyoming. Cirques and glaciated valleys in the Gallatin Range: Antler Peak, Trilobite Point, Mount Holmes, White Peaks, Three Rivers Peak. Circa 1967. Figure 3, U.S. Geological Survey Professional Paper 729-A. Photos ret00201, ret00202, and ret00203 form a panorama. #1:/Yellowstone National Park/ret00202 ID. Ruppel, E.T. 202 Yellowstone National Park, Wyoming. Cirques and glaciated valleys in the Gallatin Range: Antler Peak, Trilobite Point, Mount Holmes, White Peaks, Three Rivers Peak. Circa 1967. Figure 3, U.S. Geological Survey Professional Paper 729-A. Photos ret00201, ret00202, and ret00203 form a panorama. #1:/Yellowstone National Park/ret00203 ID. Ruppel, E.T. 203 Yellowstone National Park, Wyoming. Cirques and glaciated valleys in the Gallatin Range: Antler Peak, Trilobite Point, Mount Holmes, White Peaks, Three Rivers Peak. Circa 1967. Figure 3, U.S. Geological Survey Professional Paper 729-A. Photos ret00201, ret00202, and ret00203 form a panorama. #1:/Yellowstone National Park/ret00204 ID. Ruppel, E.T. 204 Yellowstone National Park, Wyoming. Three Rivers Peak, viewed from the northeast. Measured section of Pilgrim Limestone and Snowy Range Formation is on the northeast (left) shoulder of the peak. The flat shelf at the base of the main cliff is the top of Pilgrim Limestone. The upper shelf is the top of the Jefferson Formation, and the top of the peak is Lodgepole Limestone. Circa 1967. Figure 6, U.S. Geological Survey Professional Paper 729-A. #1:/Yellowstone National Park/ret00205 ID. Ruppel, E.T. 205 Yellowstone National Park, Wyoming. Cliff outcrops of Cambrian and Ordovician rocks. View is south from Bighorn Pass in the Gallatin Range. On the right, the lower cliff is Pilgrim Limestone. The middle platy beds are the Sage Limestone Member of the Snowy Range Formation. The upper cliff is Bighorn Dolomite. The cliffs in the cirque headwall (center left) are part of the Indian Creek laccolith. Circa 1967. Figure 7, U.S. Geological Survey Professional Paper 729-A. Photos ret00205 and ret00206 form a panorama. #1:/Yellowstone National Park/ret00206 ID. Ruppel, E.T. 206 Yellowstone National Park, Wyoming. Cliff outcrops of Cambrian and Ordovician rocks. View is south from Bighorn Pass in the Gallatin Range. On the right, the lower cliff is Pilgrim Limestone. The middle platy beds are the Sage Limestone Member of the Snowy Range Formation. The upper cliff is Bighorn Dolomite. The cliffs in the cirque headwall (center left) are part of the Indian Creek laccolith. Circa 1967. Figure 7, U.S. Geological Survey Professional Paper 729-A. Photos ret00205 and ret00206 form a panorama. #1:/Yellowstone National Park/ret00207 ID. Ruppel, E.T. 207 Yellowstone National Park, Wyoming. Bannock Peak and the head of Panther Creek. View is north from the vicinity of Antler Peak in the Gallatin Range. The measured section of Mississippian rocks is upspur in the center. Circa 1967. Figure 8, U.S. Geological Survey Professional Paper 729-A. Photos ret00207, ret00208, ret00209, and ret00210 form a panorama. #1:/Yellowstone National Park/ret00208 ID. Ruppel, E.T. 208 Yellowstone National Park, Wyoming. Bannock Peak and the head of Panther Creek. View is north from the vicinity of Antler Peak in the Gallatin Range. The measured section of Mississippian rocks is upspur in the center. Circa 1967. Figure 8, U.S. Geological Survey Professional Paper 729-A. Photos ret00207, ret00208, ret00209, and ret00210 form a panorama. #1:/Yellowstone National Park/ret00209 ID. Ruppel, E.T. 209 Yellowstone National Park, Wyoming. Bannock Peak and the head of Panther Creek. View is north from the vicinity of Antler Peak in the Gallatin Range. The measured section of Mississippian rocks is upspur in the center. Circa 1967. Figure 8, U.S. Geological Survey Professional Paper 729-A. Photos ret00207, ret00208, ret00209, and ret00210 form a panorama. #1:/Yellowstone National Park/ret00210 ID. Ruppel, E.T. 210 Yellowstone National Park, Wyoming. Bannock Peak and the head of Panther Creek. View is north from the vicinity of Antler Peak in the Gallatin Range. The measured section of Mississippian rocks is upspur in the center. Circa 1967. Figure 8, U.S. Geological Survey Professional Paper 729-A. Photos ret00207, ret00208, ret00209, and ret00210 form a panorama. #1:/Yellowstone National Park/ret00220 ID. Ruppel, E.T. 220 Yellowstone National Park, Wyoming. Sedimentary rocks exposed on Crowfoot Ridge in the Gallatin Range. View is from the east. The cliff on the left is Meagher Limestone. The low cliff in the center is Pilgrim Limestone. The high ridge on the right is Madison Group. The Crowfoot fault zone occupies a swale between the Pilgim and the Madison. Circa 1967. Figure 5, U.S. Geological Survey Professional Paper 729-A. #1:/Yellowstone National Park/ret00222 ID. Ruppel, E.T. 222 Yellowstone National Park, Wyoming. Electric Peak, showing outcrops of Cretaceous sedimentary rocks. Rocks in the foreground are Frontier Sandstone; those on the crest of Electric Peak are Eagle Sandstone. View is northeast from the vicinity of the head of Fan Creek in the Gallatin Range. Circa 1967. Figure 10, U.S. Geological Survey Professional Paper 729-A. #1:/Yellowstone National Park/ret00223 ID. Ruppel, E.T. 223 Yellowstone National Park, Wyoming. Roof of the Indian Creek laccolith northeast of Gallatin Lake. View is northeast. The laccolith underlies the slide rock-covered slope in the lower part of the photograph, beneath a prominent cliff of Pilgrim Limestone. The snowcapped peak, left center, is Bannock Peak, underlain mainly by the Madison Group. The timbered, cliffy slope near the right edge is the south face of Quadrant Mountain. Circa 1967. Figure 17, U.S. Geological Survey Professional Paper 729-A. #1:/Glacier National Park/rez00018 ID. Rezak, R. 18 Glacier National Park, Montana. Conophyton zone 1 in Siyeh Limestone, 6.4 miles west of Logan Pass on Going-to-the-Sun Highway. 1951. #1:/Glacier National Park/rez00022 ID. Rezak, R. 22 Glacier National Park, Montana. Fault cutting off-reef and reef structures in Conophyton zone 1 in Siyeh Limestone, just east of Logan Pass on Going-to-the- Sun Highway. 1951. #1:/Glacier National Park/rez00027 ID. Rezak, R. 27 Glacier National Park, Montana. Collenia symmetrica in Siyeh Limestone about 100 yards west of Logan Pass. 1951. #1:/Glacier National Park/rez00028 ID. Rezak, R. 28 Glacier National Park, Montana. Collenia undosa in Collenia undosa zone 2 in the cirque between Clements Mountain and Mount Oberlin. Colony underlain by finely laminated argillite; overlain by coarse calcareous sandstone. Stromatolite made up of alternating layers of pure limestone and argillite. 1951. Plate 21, Figure 8, U.S. Geological Survey Professional Paper 294-D. #1:/Glacier National Park/rez00031 ID. Rezak, R. 31 Glacier National Park, Montana. Upper surface of Collenia undosa biostrorne in a cirque between Mount Clements and Mount Oberlin. 1951. #1:/Glacier National Park/rez00032 ID. Rezak, R. 32 Glacier National Park, Montana. Collenia undosa, in the Missoula Group near Hidden Lake Trail, shows how mammillae form. 1951. #1:/Glacier National Park/rez00049 ID. Rezak, R. 49 Glacier National Park, Montana. Grinnell Glacier, viewed from Little Gem Observation Point on top of The Garden Wall. 1952. #1:/Glacier National Park/rez00050 ID. Rezak, R. 50 Glacier National Park, Montana. Collenia undosa in the Missoula Group on The Garden Wall below the trail to Little Gem Observation Point. 1952. #1:/Glacier National Park/rez00069 ID. Rezak, R. 69 Glacier National Park, Montana. Conophyton inclinatum n. sp. in Conophyton zone 2 in the Missoula Group along the Great Northern Railway tracks opposite the point where Devil Creek flows into Bear Creek. This joint surface shows nearly circular sections of the cones. 1952. Plate 23, Figure 3, U.S. Geological Survey Professional Paper 294-D; Figure 134, U.S. Geological Survey Professional Paper 294-K. #1:/Glacier National Park/rez00071 ID. Rezak, R. 71 Glacier National Park, Montana. Conophyton inclinatum n. sp. in Conophyton zone 2 in the Missoula Group along the Great Northern Railway tracks opposite the point where Devil Creek flows into Bear Creek. Bedding surface shows conical nature of laminae. 1952. Plate 23, Figure 1, U.S. Geological Survey Professional Paper 294-D; Figure 135, U.S. Geological Survey Professional Paper 294-K. #1:/Glacier National Park/rez00078 ID. Rezak, R. 78 Glacier National Park, Montana. Lewis overthrust on Summit Mountain, viewed from Marias Pass. 1952. Figure 139, U.S. Geological Survey Professional Paper 294-K; Figure 21, U.S. Geological Survey Professional Paper 296. #1:/Glacier National Park/rez00121 ID. Rezak, R. 121 Glacier National Park, Montana. Collenia frequens in Conophyton zone 2 in the Missoula Group on top of Running Rabbit Mountain. Figure 136, U.S. Geological Survey Professional Paper 294-K. #1:/Glacier National Park/rez00127 ID. Rezak, R. 127 Glacier National Park, Montana. Lake Ellen Wilson, viewed from Lincoln Peak near Sperry Chalet. 1952. #1:/Glacier National Park/rez00129 ID. Rezak, R. 129 Glacier National Park, Montana. Mount Edward and fold in Grinnell Argillite, viewed from Sperry Chalet. 1952. #1:/Glacier National Park/rez00130 ID. Rezak, R. 130 Glacier National Park, Montana. Sperry Glacier. 1952. Figure 137, U.S. Geological Survey Professional Paper 294-K. #1:/Glacier National Park/rez00179 ID. Rezak, R. 179 Glacier National Park, Montana. Mount Reynolds, viewed from the top of Mount Oberlin. 1953. #1:/Glacier National Park/rez00181 ID. Rezak, R. 181 Glacier National Park, Montana. Heavens Peak, viewed from the top of Mount Oberlin. 1953. #1:/Glacier National Park/rez00186 ID. Rezak, R. 186 Glacier National Park, Montana. Collenia frequens in the Collenia frequens zone in Altyn Limestone near Appekunny Falls. Joint surface shows longitudinal section of cylindroids with strongly convex laminae. 1953. Plate 20, Figure 4, U.S. Geological Survey Professional Paper 294-D; Figure 123, U.S. Geological Survey Professional Paper 294-K. #1:/Glacier National Park/rez00189 ID. Rezak, R. 189 Glacier National Park, Montana. Collenia multiflabella in the Collenia multiflabella zone in Siyeh Limestone on the east side of Logan Pass just above the point where Reynolds Creek plunges into Saint Mary Valley. 1953. Figure 127, U.S. Geological Survey Professional Paper 294-K. #1:/Glacier National Park/rez00190 ID. Rezak, R. 190 Glacier National Park, Montana. Mount Reynolds, viewed from Birdwoman Pass. 1953. #1:/Glacier National Park/rez00195 ID. Rezak, R. 195 Glacier National Park, Montana. Towards Logan Pass, viewed from near Fifty Mountain Camp, showing Mount Gould (left), Mount Oberlin (center), Sperry Glacier and Mount Brown (right). 1953. #1:/Glacier National Park/rez0019a ID. Rezak, R. 19a Glacier National Park, Montana. Conophyton zone 1 in Siyeh Limestone just east of Logan Pass on Going-to-the-Sun Highway. l951. #1:/Glacier National Park/rez00201 ID. Rezak, R. 201 Glacier National Park, Montana. Infra red photograph of North Fork Flathead River and Glacier National Park, viewed from Glacier View Mountain. View is slightly to the south. 1953. #1:/Glacier National Park/rez00202 ID. Rezak, R. 202 Glacier National Park, Montana. Infra red photograph of The Garden Wall, viewed from the top of Mount Oberlin. 1953. #1:/Glacier National Park/rez00203 ID. Rezak, R. 203 Glacier National Park, Montana. Infra red photograph of Mount Reynolds, viewed from the top of Mount Oberlin. 1953. #1:/Glacier National Park/rez00250 ID. Rezak, R. 250 Glacier National Park, Montana. McDonald Valley and The Garden Wall, viewed from the top of Mount Oberlin. The Conophyton zone can be seen crossing Going- to-the-Sun Highway at two points. The 100-foot zone appears as a narrow light-colored band crossing diagonally just below the center. 1954. Plate 18, U.S. Geological Survey Professional Paper 294-D. #1:/Glacier National Park/rez00283 ID. Rezak, R. 283 Glacier National Park, Montana. Conophyton inclinatum n. sp. (X 1/4), from Conophyton zone 1. Specimen found weathered out of zone on The Garden Wall Trail near Haystack Butte. Plate 23, Figure 5, U.S. Geological Survey Professional Paper 294-D. #1:/Glacier National Park/rez0133a ID. Rezak, R. 133a Glacier National Park, Montana. Mass of Conophyton inclinatum in Conophyton zone 1 in Siyeh Limestone, 6.4 miles west of Logan Pass on Going-to-the-Sun Highway. 1952. Plate 23, Figure 9, U.S. Geological Survey Professional Paper 294-D; Figure 125, U.S. Geological Survey Professional Paper 294-K. #1:/Glacier National Park/rez0193a ID. Rezak, R. 193a Glacier National Park, Montana. Collenia frequens in Conophyton zone 1, 1.5 miles north of Fifty Mountain Camp on the trail to Waterton Lake. Joint surface shows longitudinal section of cylindroids with very gently convex laminae. 1953. Plate 20, Figure 2, U.S. Geological Survey Professional Paper 294-D. #1:/Ransome F.L. Collection/rfl00007 ID. Ransome, F.L. 7 Kendall Mountain avalanche chute above Silverton. San Juan County, Colorado. 1900. #1:/Ranome F.L. Collection-Newman Hill Mine-Enterprise Mine/rfl00010 ID. Ransome, F.L. 10 Newman Hill Mines from the northwest. Showing the locations of Enterprise mine, Silver Age tunnel, Wakeman and Golden Age tunnel, Isabella shaft, Enterprise shaft, Jumbo shaft, Vestal shaft, Newman mines, Stephens tunnel, Lexington tunnel, Rico-Aspen mine, Syndicate tunnel and Stephanite tunnel, in a clockwise direction from large dump in left third of photo. Rico District. Dolores County, Colorado. 1900. Plate 27 in U.S. Geological Survey, 22nd Annual Report pt.2. 1901. #1:/Ransome F.L. Collection-Puzzle Mine/rfl00011 ID. Ransome, F.L. 11 Puzzle Mine with landslip mass in foreground, C.H.C. Hill in background. Dolores County, Colorado. 1900. #1:/Ransome F.L. Collection-Black Hawk Mine-Uncle Ned Mine/rfl00016 ID. Ransome, F.L. 16 Black Hawk Mine and fault-fissure from Uncle Ned Mine. Rico district. Dolores County, Colorado. 1900. #1:/Ransome F.L. Collection-Rico-Aspen Mine/rfl00022 ID. Ransome, F.L. 22 Under surface of gypsum bed, showing solution cavities. Rico-Aspen mine. Rico District. Dolores County, Colorado. 1900. Plate 33 (as a sketch) in U.S. Geological Survey 22nd Annual Report, pt.2. 1901. #1:/Ransome F.L. Collection-Red Mountain-Barstow Mine/rfl00025 ID. Ransome, F.L. 25 Red Mountain and Mines from road to Barstow mine. Red Mountain. Ouray County, Colorado. 1900. Portion published on p.4, lower right, in U.S. Geological Survey. Images of the U.S.G.S., 1879-1979. 1979. #1:/Ransome F.L. Collection/rfl00493 ID. Ransome, F.L. 493 Mineral Hill from Globe Hill. Cripple Creek District. Teller County, Colorado. October 10, 1903. #1:/Ransome F.L. Collection/rfl00508 ID. Ransome, F.L. 508 Mining activity on top of Raven Hill from Windy Point. Direction south- southwest. Cripple Creek Mining District, Teller County, Colorado. October 8, 1903. #1:/Ransome F.L. Collection-Joe Dandy Mine/rfl00509 ID. Ransome, F.L. 509 Joe Dandy mine and Raven Hill from southwest slope of Bull Hill. Cripple Creek District. Teller County, Colorado. October 7, 1903. #1:/Ransome F.L. Collection-Moose Mine/rfl00510 ID. Ransome, F.L. 510 Moose mine and Raven Hill from southwest slope of Bull Hill. Cripple Creek District. Teller County, Colorado. October 7, 1903. #1:/Ransome F.L. Collection-Morning Glory Mine/rfl00511 ID. Ransome, F.L. 511 Morning Glory Mine from Gold Hill and dwellings, Cripple Creek District, Teller County, Colorado. October 5, 1903. #1:/Ransome F.L. Collection/rfl00512 ID. Ransome, F.L. 512 Mines and dumps on Raven Hill from Guyot Hill. Cripple Creek District. Teller County, Colorado. October 5, 1903. #1:/Ransome F.L. Collection/rfl00513 ID. Ransome, F.L. 513 Mining activity Raven Hill from Guyot Hill. Cripple Creek District. Teller County, Colorado. October 5, 1903. #1:/Ransome F.L. Collection-Elkton Mine/rfl00514 ID. Ransome, F.L. 514 Elkton Mine from Guyot Hill. Cripple Creek District. Teller County, Colorado. October 5, 1903. #1:/Ransome F.L. Collection-Bull Hill Mine/rfl00515 ID. Ransome, F.L. 515 Bull Hill mines from Raven Hill. Cripple Creek District. Teller County, Colorado. October 7, 1903. #1:/Ransome F.L. Collection-Bull Hill/rfl00516 ID. Ransome, F.L. 516 Southwest slope of Bull Hill, from Squaw Mountain, Pikes Peak in the distance. Cripple Creek District. Teller County, Colorado. October 3, 1903. Plate 25-A in U.S. Geological Survey. Professional paper 54. 1906. #1:/Ransome F.L. Collection-Mary McKinney Mine-Katinka Mine/rfl00517 ID. Ransome, F.L. 517 Mary McKinney and Katinka mines from Anaconda surface stope in Gold Hill. Cripple Creek District. Teller County, Colorado. October 5, 1903. #1:/Ransome F.L. Collection-Battle Mountain Mine/rfl00518 ID. Ransome, F.L. 518 Battle Mountain mines from Squaw Mountain. Goldfield is in the distance with Big Bull and Pikes Peak on the skyline. Cripple Creek District. Teller County, Colorado. October 3, 1903. Plate 6-B in U.S. Geological Survey. Professional paper 54. 1906. #1:/Ransome F.L. Collection-El Paso Mine-Old Gold Mine/rfl00521 ID. Ransome, F.L. 521 El Paso and Old Gold mines from Roseland Hill. Cripple Creek District. Teller County, Colorado. October 5, 1903. #1:/Ransome F.L. Collection-Golden Cycle Mine/rfl00526 ID. Ransome, F.L. 526 Golden Cycle mine from Battle Mountain. Panorama with photos 527 and 528. Cripple Creek District. Teller County, Colorado. October 7, 1903. Plate 26-A in U.S. Geological Survey. Professional paper 54. 1906. #1:/Ransome F.L. Collection-Vindicator Mine-Lille Mine/rfl00527 ID. Ransome, F.L. 527 Vindicator and Lille mines from Battle Mountain. Panorama with photos 526 and 528. Cripple Creek District. Teller County, Colorado. October 7, 1903. #1:/Ransome F.L. Collection-Altman Mine-Last Dollar Mine/rfl00528 ID. Ransome, F.L. 528 Altman and Last Dollar mine from Battle Mountain. Direction north. Panorama with photos 526 and 527. Cripple Creek Mining District. Teller County, Colorado. October 7, 1903. #1:/Ransome F.L. Collection/rfl00531 ID. Ransome, F.L. 531 Bull Cliff and Bull Hill from Ironclad Hill. Cripple Creek District. Teller County, Colorado. October 8, 1903. #1:/Ransome F.L. Collection/rfl00532 ID. Ransome, F.L. 532 Goldfield from east side of Battle Mountain. Cripple Creek District. Teller County, Colorado. October 7, 1903. #1:/Ransome F.L. Collection/rfl00536 ID. Ransome, F.L. 536 Surface stope on Anaconda vein, Gold Hill. Cripple Creek District. Teller County, Colorado. October 5, 1903. Plate 16-A in U.S. Geological Survey. Professional paper 54. 1906. #1:/Ransome F.L. Collection/rfl00538 ID. Ransome, F.L. 538 North face of No. 3, Captain vein, sheeted structure in breccia. Direction north Portland Mine 5th level. Cripple Creek District. Teller County, Colorado. October 3, 1903. Plate 14-A in U.S. Geological Survey Professional paper 54, 1906. #1:/Ransome F.L. Collection-Portland Mine/rfl00539 ID. Ransome, F.L. 539 Portland Mine, sixth level, north face of No.8. Captain vein. Cripple Creek District. Teller County, Colorado. October 3, 1903. Plate 14-b in U.S. Geological Survey Professional paper 54, 1906. #1:/Ransome F.L. Collection-Portland Mine/rfl00542 ID. Ransome, F.L. 542 Portland Mine 5th level. Basalt dykes in breccia. Cripple Creek District. Teller County, Colorado. October 3, 1903. Plate 16-B in U.S. Geological Survey Professional paper 54, 1906. #1:/Colorado-Professional paper 75/rfl00702 ID. Ransome, F.L. 702 The Jessie mine from the south, the following mines or openings are identified from left to right, top to bottom (as numbers 1 thru 7) on published photo: Seminole open stope, May B, open stope, Disbrow open stope, Glenwood tunnel, Jessie tunnel, Hattie tunnel and Quincy tunnel. In the foreground is part of the Gold Run placer. Summit County, Colorado. 1909. Plate 29-A in U.S. Geological Survey. Professional paper 75. 1911. #1:/Ransome F.L. Collection/rfl00703 ID. Ransome, F.L. 703 General view of the Gold Run placers from the southwest, these, probably the most productive and extensively worked hydraulic washings in the district, are in the older hillside wash. Buffalo Peak and Gore Range in the distance. Breckenridge District. Summit County, Colorado. 1909. Plate 16-A in U.S. Geological Survey Professional paper 75, 1911. #1:/Ransome F.L. Collection-Jessie Mine/rfl00705 ID. Ransome, F.L. 705 Gold Run hydraulic workings looking southwest from the Jessie Mine. Breckenridge District. Summit County, Colorado. 1909. #1:/Ransome F.L. Collection/rfl00713 ID. Ransome, F.L. 713 Terrace gravels on the east side of the Blue about a mile north of Breckenridge. The view is from the Banner placer on the west. The wooded hill in the background is the north spur from Gibson Hill and is porphyry capped with quartzite. Breckenridge District. Summit County, Colorado. 1909. Plate 13-B in U.S. Geological Survey Professional paper 75, 1911. #1:/Ransome F.L. Collection/rfl00714 ID. Ransome, F.L. 714 Dredge on the Blue, near mouth of the Swan. In 1909 this boat was working in difficult ground with many huge boulders. It was not put into commission in 1910. It has 9.5 foot open connected buckets. Colorado Gold Dredging Companion the Blue. Breckenridge District. Summit County, Colorado. 1909. Plate 24-A in U.S. Geological Survey Professional paper 75, 1911. #1:/Ransome F.L. Collection/rfl00715 ID. Ransome, F.L. 715 Dredge of the Colorado Gold Dredging Company on the Blue River, just above the mouth of the Swan River. Looking down the Blue River from ridge between the two rivers. Breckenridge District. Summit County, Colorado. 1909. #1:/Ransome F.L. Collection/rfl00716 ID. Ransome, F.L. 716 Bucyrus dredge of the Colorado Gold Dredging Company working up the Swan past the old Risdon dredge, Ten mile Range on the left. Gore Mountains on the right. Breckenridge District. Summit County, Colorado. 1909. Plate 33-B in U.S. Geological Survey Professional paper 75, 1911. #1:/Ransome F.L. Collection/rfl00717 ID. Ransome, F.L. 717 Gold dredge working up the Swan from Valdoro, the view is north down the Swan. The long ridge of gravel is the work of this dredge, which worked down to the Blue. The small, dilapidated machine in front of the larger craft is an old steam dredge that never moved far from the spot where it was launched. Breckenridge District. Summit County, Colorado. 1909. Plate 33-A in U.S. Geological Survey Professional paper 75, 1911. #1:/Ransome F.L. Collection-Wellington Mine/rfl00725 ID. Ransome, F.L. 725 Wellington Mine from the lower County Boy Tunnel. These are properly the Oro workings, with old Wellington tunnel being nearly half a mile up the gulch, to the right. The course of the vein is diagonally up the hill to the right, nearly along the line of dumps. There is no real outcrop. Beginning from the mill near the center, the dumps are identified left to right has; Main Oro adit, Old Oro adit, Oro shaft, and Siam tunnel. Breckenridge District. Summit County, Colorado. 1909. Plate 27-A in U.S. Geological Survey Professional paper 75, 1911. #1:/Ransome F.L. Collection/rfl00726 ID. Ransome, F.L. 726 French Gulch from Nigger Hill, showing mines and dredging operations. Starting in the lower left corner with the Reiling dredge. This has just turned after a successful run upstream. A few visible operations are further identified from near top of hill at left to right: as Old Onion shaft, Old Union mill and tunnel, lower left, and Reliance dredge just right of center. Mineral and Farncomb hills are seen in the distant background. Breckenridge District. Summit County, Colorado. 1909. Plate 24-B in U.S. Geological Survey Professional paper 75, 1911. #1:/Richardson G.B. Collection/rgb00110 ID. Richardson, G.B. 110 Bonneville terrace south of Provo River. Wasatch County, Utah.n.d. #1:/Richardson G.B. Collection/rgb00124 ID. Richardson, G.B. 124 Entrance to coal mine on Wasatch Plateau east of Mount Pleasant. Sanpete County, Utah. ca 1905. #1:/Richardson G.B. Collection-Ballards Mine/rgb00165 ID. Richardson, G.B. 165 Ballards mine, north of Thompsons. Grand County, Utah.n.d. Plate 9-A in U.S. Geological Survey. Bulletin 371. 1909. #1:/Richardson G.B. Collection-Ballards Mine/rgb00166 ID. Richardson, G.B. 166 Outcrop of coal at entrance to Ballards Mine showing jointing of coal, M.R. Campbell provides scale. Grand County, Utah.n.d. Plate 9-B in U.S. Geological Survey. Bulletin 371. 1909. #1:/Richardson G.B. Collection-Kanarra Mine/rgb00180 ID. Richardson, G.B. 180 Exterior of Kanarra mine and old coke oven on the left, Colob Coal Field. Iron County, Utah. ca 1907. #1:/Richardson G.B. Collection-Glendale Mine/rgb00187 ID. Richardson, G.B. 187 Glendale Mine. Colob Coal field, Sec. 24, T. 40 S., R. 7 W. Kane County, Utah. 1905. #1:/Rock Creek Park/rgs00217 ID. Rogers, G.S. 217 Rock Creek Park, Washington, District of Columbia. Ford in the park. 1913. #1:/Yellowstone National Park/rgs00250 ID. Rogers, G.S. 250 Yellowstone National Park, Wyoming. Mammoth Hot Springs on the left and Fort Yellowstone on the right, viewed from the government road. Circa 1913. #1:/Yellowstone National Park/rgs00251 ID. Rogers, G.S. 251 Yellowstone National Park, Wyoming. Minerva Terrace in the Mammoth Hot Springs area. Circa 1913. #1:/Yellowstone National Park/rgs00253 ID. Rogers, G.S. 253 Yellowstone National Park, Wyoming. Rustic Falls. Circa 1913. #1:/Yellowstone National Park/rgs00255 ID. Rogers, G.S. 255 Yellowstone National Park, Wyoming.G.S. Rogers at Jupiter Terrace (Hot Springs). Circa 1913. #1:/Yellowstone National Park/rgs00267 ID. Rogers, G.S. 267 Yellowstone National Park, Wyoming.G.S. Rogers at Liberty Cap. Circa 1913. #1:/Grand Canyon National Park/rgs00281 ID. Rogers, G.S. 281 Grand Canyon National Park, Arizona. Pueblo Indian House near the El Tovar Hotel and Bright Angel Trail. 1914. #1:/Fossils/rjc00045 ID. Ratte, J.C. 45ct Fossils. Fossil fern leaves collected in the wall of Pauahi crater in Hawaii. February 1974. #1:/Denali National Park and Preserve/rjc00203 ID. Reed, J.C. 203 Denali National Park and Preserve, Alaska. Mount McKinley, viewed from Thorofare Pass. 1931. #1:/Glacier Bay National Park and Preserve/rjc00233 ID. Reed, J.C. 233 Glacier Bay National Park and Preserve, Alaska. "Dead ice" east of Nunatak on the east side of Muir Glacier. August 18, 1936. #1:/Glacier Bay National Park and Preserve/rjc00242 ID. Reed, J.C. 242 Glacier Bay National Park and Preserve, Alaska. End of Reid Glacier, viewed from 649-foot elevation west of it. August 8, 1936. #1:/Glacier Bay National Park and Preserve/rjc00246 ID. Reed, J.C. 246 Glacier Bay National Park and Preserve, Alaska. Rendu Glacier, viewed from near Romer Glacier. August 19, 1936. #1:/Glacier Bay National Park and Preserve/rjc00249 ID. Reed, J.C. 249 Glacier Bay National Park and Preserve, Alaska. Grand Pacific Glacier and Margerie Glacier, viewed from the east side of Tarr Inlet. August 19, 1936. #1:/Glacier Bay National Park and Preserve/rjc00251 ID. Reed, J.C. 251 Glacier Bay National Park and Preserve, Alaska. Clair Krough sawing a section from an interglacial log buried in the gravel bank along the shore of a small bay south of Nunatak at the east edge of Muir Glacier. August 18, 1936. #1:/Glacier Bay National Park and Preserve/rjc00252 ID. Reed, J.C. 252 Glacier Bay National Park and Preserve, Alaska. The "Grissly Bear" at anchor in Sandy Cove at Paup prospect. August 18, 1936. #1:/Glacier Bay National Park and Preserve/rjc00253 ID. Reed, J.C. 253 Glacier Bay National Park and Preserve, Alaska.J.P. Ibach, prospector, at prospect near Reid Glacier. August 18, 1936. #1:/Alaska/rjc00596 ID. Reed, J.C. 596 Alaska. Basaltic dike cutting massive limestone on one of the Robber Islands. Note the glacial groves and striae. August 21, 1940. #1:/Glacier Bay National Park and Preserve/rjc00649 ID. Reed, J.C. 649 Glacier Bay National Park and Preserve, Alaska. Muir Glacier, viewed from Muir Inlet. July 16, 1941. #1:/Glacier Bay National Park and Preserve/rjc00656 ID. Reed, J.C. 656 Glacier Bay National Park and Preserve, Alaska. East side of the face of Muir Glacier. July 16, 1941. #1:/Glacier Bay National Park and Preserve/rjc00657 ID. Reed, J.C. 657 Glacier Bay National Park and Preserve, Alaska. West side of the face of Muir Glacier. July 16, 1941. #1:/Glacier Bay National Park and Preserve/rjc00658 ID. Reed, J.C. 658 Glacier Bay National Park and Preserve, Alaska. West side of the face of Muir Glacier. July 16, 1941. #1:/Glacier Bay National Park and Preserve/rjc00663 ID. Reed, J.C. 663 Glacier Bay National Park and Preserve, Alaska. Terminus of Geikie Glacier. July 11, 1941. #1:/Glacier Bay National Park and Preserve/rjc00702 ID. Reed, J.C. 702 Glacier Bay National Park and Preserve, Alaska. Icebergs in Muir Inlet near Molybdenite Cove. 1942. #1:/Glacier Bay National Park and Preserve/rjc00713 ID. Reed, J.C. 713 Glacier Bay National Park and Preserve, Alaska. The "Sylph" in front of Grand Pacific Glacier. July 29, 1942. #1:/Glacier Bay National Park and Preserve/rjc00715 ID. Reed, J.C. 715 Glacier Bay National Park and Preserve, Alaska. De Margerie Glacier and Grand Pacific Glacier, viewed from the east side of Terr Inlet at boundary. 1942. #1:/Glacier Bay National Park and Preserve/rjc00750 ID. Reed, J.C. 750 Glacier Bay National Park and Preserve, Alaska. Front of Margerie Glacier. July 4, 1946. #1:/Glacier Bay National Park and Preserve/rjc0273b ID. Reed, J.C. 273b Glacier Bay National Park and Preserve, Alaska.R.H. Sargent on the bow of the "Grizzly Bear" in Glacier Bay. 1936. #1:/Shenandoah National Park/rjcj0024 ID. Reed, J.C. Jr 24 Shenandoah National Park, Virginia. The summit profile of Stony Man (altitude 4,010 feet) on the crest of the Blue Ridge and the Little Stony Cliffs (left) are outcrops of ancient lava flows of the Catoctin Formation. Frontispiece, U.S. Geological Survey Bulletin 1265. #1:/Shenandoah National Park/rjcj0025 ID. Reed, J.C. Jr 25 Shenandoah National Park, Virginia. Blue Ridge, viewed from the west. The flat fertile valley floor (foreground) is underlain by limestone of the Paleozoic age capped by terrace gravel. The low wooded foothills (middle distance) are underlain by steeply dipping quartzite and shale of the Chilhowee Group. The main mass of the Blue Ridge is composed of granitic basement rocks, but the highest part of the ridge is capped by greenstone of the Catoctin Formation. Photo by U.S. National Park Service. Figure 1, U.S. Geological Survey Bulletin 1265. #1:/Shenandoah National Park/rjcj0026 ID. Reed, J.C. Jr 26 Shenandoah National Park, Virginia. Franklin Cliffs, viewed from Big Meadows Campground, showing the prominent cliffs marking the outcrops of the second and third flows above the base of the Catoctin Formation. Note the change in attitude of flows near the fault. Figure 5, U.S. Geological Survey Bulletin 1265. #1:/Shenandoah National Park/rjcj0027 ID. Reed, J.C. Jr 27 Shenandoah National Park, Virginia. The upper falls in Whiteoak Canyon is one of the many waterfalls formed where streams cross the lava flow of the Catoctin Formation. Generally falls occur where streams cross massive greenstone in the middle of the flow. Steps between falls occur where streams cross sheared breccia zones between flows. Figure 6, U.S. Geological Survey Bulletin 1265. #1:/Shenandoah National Park/rjcj0028 ID. Reed, J.C. Jr 28 Shenandoah National Park, Virginia. Schistose greenstone along the Appalachian Trail at the base of Little Stony Man Cliffs. Here, a zone of breccia and schistose greenstone marks the boundary between the second and third flows above the base of the Catoctin Formation. The outcrop is approximately 3 feet high. Figure 7, U.S. Geological Survey Bulletin 1265. #1:/Shenandoah National Park/rjcj0029 ID. Reed, J.C. Jr 29 Shenandoah National Park, Virginia. Columnar jointing in greenstone. Small wavy columns at the top of the cliff above the Appalachian Trail about 0.15 mile north of Hawksbill Gap. Figure 9 (left), U.S. Geological Survey Bulletin 1265. #1:/Shenandoah National Park/rjcj0030 ID. Reed, J.C. Jr 30 Shenandoah National Park, Virginia. Columnar jointing in greenstone. Large column along the Appalachian Trail about 200 feet south of Little Stony Man parking area. The column is cut by cleavage which dips east, away from the observer. The segment of the coluiai above each cleavage plane is offset westward from the segment beneath as a result of movement during formation of the cleavage. Column is approximately 2 feet in diameter. Figure 9 (right), U.S. Geological Survey Bulletin 1265. #1:/Shenandoah National Park/rjcj0033 ID. Reed, J.C. Jr 33 Shenandoah National Park, Virginia. Sandstone dikes in greenstone. Outcrop is on the north side of Skyline Drive at mile 47.3 on the south side of Hawksbill Mountain. Sandstone (light gray) displays faint subhorizontal bedding. Greenstone (darker gray) displays a dark chloritic border at the edge of the dike. The knife is about 3 inches long. Figure 11, U.S. Geological Survey Bulletin 1265. #1:/Shenandoah National Park/rjcj0034 ID. Reed, J.C. Jr 34 Shenandoah National Park, Virginia. Sawed slab of amygdaloid breccia. Slab is from the outcrop on the south side of the road about 500 feet southeast of Big Meadows Lodge. The angular blocks are probably pieces of frothy lava crust that formed at the top of the flow. The crust was broken by continued movement of the still-molten lava beneath, and jumbled pieces were rafted along and were eventually frozen in place when the flow came to rest and solidified. During later metamorphism the amygdules and some of the interstices between the blocks were filled with white quartz and yellow-green epidote. Locally, part of the rock has been altered to epidosite, a fine- grained light-green aggregate of epidote and quartz. The arcuate lines in the lower left are marks left by the saw when the specimen was cut. Specimen collected by Professor Ernst Cloos, Johns Hopkins University. Photo by J.P. Owens. Figure 12, U.S. Geological Survey Bulletin 1265. #1:/Shenandoah National Park/rjcj0035 ID. Reed, J.C. Jr 35 Shenandoah National Park, Virginia. Mud-lump breccia in the outcrop along the Appalachian Trail at the north end of the base of Little Stony Man Cliffs. Lumps of hard red argillite stand out as knots on the weathered surface. Light-gray streaks are irregular wisps of silvery phyllite. Matrix is fine- grained schistose greenstone. Figure 13, U.S. Geological Survey Bulletin 1265. #1:/Shenandoah National Park/rjcj0036 ID. Reed, J.C. Jr 36 Shenandoah National Park, Virginia. Sawed slab of porphyritic greenstone. Slab is from the outcrop on the south side of Skyline Drive at mile 80.9, about 100 yards east of Big Run Overlook in the southern section of the park. Angular to slightly rounded phenocrysts of plagioclase (now albite) occur in the matrix of finer grained albite, chlorite, and epidote displaying relict basaltic fabric. The phenocrysts in this specimen are somewhat larger than those in the porphyritic flows in the Big Meadows-Stony Man Area, but the texture is typical. Specimen collected by Professor Ernst Cloos, The Johns Hopkins University. Photo by J.P. Owens. Figure 14, U.S. Geological Survey Bulletin 1265. #1:/Shenandoah National Park/rjcj0037 ID. Reed, J.C. Jr 37 Shenandoah National Park, Virginia. Greenstone dike in basement rocks. Dike on Ridge Trail, Old Rag Mountain, about O.4 mile northeast of the summit. Wallrock is Old Rag Granite of Furcron (1934). Figure 15 (left), U.S. Geological Survey Bulletin 1265. #1:/Shenandoah National Park/rjcj0038 ID. Reed, J.C. Jr 38 Shenandoah National Park, Virginia. Greenstone dike in basement rocks. Dike at the west side of the north portal of Marys Rock Tunnel, mile 32.1, Skyline Drive. Wallrock is granodiorite. Figure 15 (right), U.S, Geological Survey Bulletin 1265. #1:/Greece/rmm00002 ID. Reddy, M.M. 2ct Greece. Column capitals of the Parthenon in Athens. Black crusts due to air pollution are present on the inward-facing surfaces of the columns and the column capitals. 1988. #1:/Greece/rmm00003 ID. Reddy, M.M. 3ct Greece. Column capitals of the Parthenon in Athens. Black crusts due to air pollution are present on the inward-facing surfaces of the columns and the column capitals in an area of ongoing restoration and reconstruction. 1988. #1:/Alaska/rrg00059 ID. Ray, R.G. 59ct Alaska. Orbicular diorite near Cook Inlet Region. September 1949. #1:/Death Valley National Park/rrj00044 ID. Ross, R.J. 44ct Death Valley National Park, California. Wild burros. 1960. #1:/Death Valley National Park/rrj00045 ID. Ross, R.J. 45ct Death Valley National Park, California. Crossing the Amargosa River. 1960. #1:/Death Valley National Park/rrj00046 ID. Ross, R.J. 46ct Death Valley National Park, California. Old native American trail worn into desert pavement. 1960. #1:/Death Valley National Park/rrj00047 ID. Ross, R.J. 47ct Death Valley National Park, California. 1960. #1:/Death Valley National Park/rrj00048 ID. Ross, R.J. 48ct Death Valley National Park, California. Natural Bridge on Tucki Mountain. C.B. Hunt. 1960 #1:/Death Valley National Park/rrj00050 ID. Ross, R.J. 50ct Death Valley National Park, California. Old borax works. 1960. #1:/Death Valley National Park/rrj00051 ID. Ross, R.J. 51ct Death Valley National Park, California. Old borax works. 1960. #1:/Death Valley National Park/rtw00024 ID. Robinson, T.W. 24 Death Valley National Park, California. Devil's Corn Field near Stovepipe Wells shows clumps of arrowweed in a sand dune area, the roots having been partially exposed by wind erosion. The capillary fringe is at the land surface here. Figure 18, U.S. Geological Survey Water-Supply Paper 1423. #1:/Death Valley National Park/rtw00029 ID. Robinson, T.W. 29 Death Valley National Park, California. An unusually luxuriant and tall growth of willows lines the banks of Grapevine Creek at Scotty's Castle (background) surrounded by nearly barren hills. Figure 26 (upper photo), U.S. Geological Survey Water-Supply Paper 1423. #1:/Death Valley National Park/rtw00083 ID. Robinson, T.W. 83 Death Valley National Park, California. Desertrush (Juncus cooperi) in association with saltgrass (Distichlis stricta) on the edge of the playa about 5 miles north of Furnace Creek Ranch. Circa 1955. Figure 20, U.S. Geological Survey Water-Supply Paper 1423. #1:/Death Valley National Park/rtw00084 ID. Robinson, T.W. 84 Death Valley National Park, California. Fourwing salt-bush (Atriplex canescens) growing in clumps along the channel of Salt Creek about 3 miles west of Beatty Junction. Circa 1955. Figure 21, U.S. Geological Survey Water-Supply Paper 1423. #1:/Devils Tower National Monument/rww00023 ID. Rubey, W.W. 23 Devils Tower National Monument, Wyoming. Looking up the columns from near their base. Rogers and Ripley ladder used in 1893 ascent is barely visible, sunlit near the top and bottom, just right of center. Circa 1923. #1:/Katmai National Park and Preserve/s0002327 ID. S0002327 Katmai National Park and Preserve, Alaska. Katmai Caldera, a collapse feature that formed during the catastrophic eruption of nearby Novarupta Volcano in June 1912, is a steep-walled, 1.5-kilometer (1 mile) diameter crater which truncates a formerly 2,290-meter (7,513-foot) high stratovolcano. The caldera is partially filled by a blue-green lake about 250 meters (820 feet) deep. The lake level was still rising when last measured in the mid-1970's. Beyond the caldera are the multiple peaks of Trident Volcano. Mount Mageik Volcano is the snow and ice-covered cone on the skyline. View is northeast. Photo courtesy of C. Nye, Alaska Division of Geological and Geophysical Surveys, August 1991. #1:/Katmai National Park and Preserve/s0002328 ID. S0002328 Katmai National Park and Preserve, Alaska. Katmai Caldera, a collapse feature that formed during the catastrophic eruption of nearby Novarupta Volcano in June 1912, is a steep-walled, 1.5-kilometer (1 mile) diameter crater which truncates a formerly 2,290-meter (7,513-foot) high stratovolcano. The caldera is partially filled by a blue-green lake about 250 meters (820 feet) deep. The lake level was still rising when last measured in the mid-1970's. Photo by C. Neal, June 4, 1990. #1:/Katmai National Park and Preserve/s0002329 ID. S0002329 Katmai National Park and Preserve, Alaska. Katmai Caldera, a collapse feature that formed during the catastrophic eruption of nearby Novarupta Volcano in June 1912, is a steep-walled, 1.5-kilometer (1 mile) diameter crater which truncates a formerly 2,290-meter (7,513-foot) high stratovolcano. The caldera is partially filled by a blue-green lake about 250 meters (820 feet) deep. The lake level was still rising when last measured in the mid-1970's. The multiple peaks of Trident Volcano are at top left. The lava dome of Novarupta Volcano, which marks the site of the 1912 eruption, is visible at top center. Photo by C. Neal, June 4, 1990. #1:/Katmai National Park and Preserve/s0002330 ID. S0002330 Katmai National Park and Preserve, Alaska. View from the north rim of Katmai Caldera, a collapse feature that formed during the catastrophic eruption of nearby Novarupta Volcano in June 1912, is a steep-walled, 1.5-kilometer (1 mile) diameter crater which truncates a formerly 2,290-meter (7,513-foot) high stratovolcano. The caldera is partially filled by a blue-green lake about 250 meters (820 feet) deep. The lake level was still rising when last measured in the mid-1970's. The south interior wall of the caldera is visible. Photo by R. McGimsey. #1:/Katmai National Park and Preserve/s0002331 ID. S0002331 Katmai National Park and Preserve, Alaska. View from the west rim of Katmai Caldera, a collapse feature that formed during the catastrophic eruption of nearby Novarupta Volcano in June 1912, is a steep-walled, 1.5-kilometer (1 mile) diameter crater which truncates a formerly 2,290-meter (7,513-foot) high stratovolcano. The caldera is partially filled by a blue-green lake about 250 meters (820 feet) deep. The lake level was still rising when last measured in the mid-1970's. The east interior wall of the caldera is visible. Photo by R. McGimsey, July 16, 1990. #1:/Katmai National Park and Preserve/s0002334 ID. S0002334 Katmai National Park and Preserve, Alaska. 80-meter (260-foot)high Novarupta, a blocky rhyolite lava dome that marks the vent for the June 1912 eruption that created the Valley of Ten Thousand Smokes. This eruption was the most voluminous on earth in the 20th century, ejecting nearly 30 cubic kilometers (7 cubic miles) of material in 60 hours. Falling Mountain, a lava dome truncated by the 1912 eruption, is visible behind the Novarupta dome. Snow-capped Mount Mageik volcano can be seen at the top. Photo by T. Miller, June 1979. #1:/Katmai National Park and Preserve/s0002335 ID. S0002335 Katmai National Park and Preserve, Alaska. 80-meter (260-foot)high Novarupta, a blocky rhyolite lava dome that marks the vent for the June 1912 eruption that created the Valley of Ten Thousand Smokes. This eruption was the most voluminous on earth in the 20th century, ejecting nearly 30 cubic kilometers (7 cubic miles) of material in 60 hours. Surrounding the dome is an oval-shaped ring of coarse tephra that accumulated during the waning explosive phases of the eruption. Photo courtesy of C. Nye, Alaska Division of Geological and Geophysical Surveys, August 1991. #1:/Katmai National Park and Preserve/s0002336 ID. S0002336 Katmai National Park and Preserve, Alaska. Novarupta lava dome (dark, rounded feature in center), viewed from Mount Katmai, which is surrounded by (clockwise from upper left) Falling Mountain, Baked Mountain, and Broken Mountain. The Valley of Ten Thousand Smokes, upper right, was created by the June 1912 eruption of Novarupta Volcano. Photo courtesy of C. Nye, Alaska Division of Geological and Geophysical Surveys, August 1991. #1:/Katmai National Park and Preserve/s0002337 ID. S0002337 Katmai National Park and Preserve, Alaska. Cross section of the June 1912 ash flow exposed by the River Lethe in the Valley of Ten Thousand Smokes. In places, the ash flow is up to 200 meters (660 feet) thick. Photo courtesy of S. McNutt, Geophysical Institute, University of Alaska Fairbanks, July 1993. #1:/Katmai National Park and Preserve/s0002338 ID. S0002338 Katmai National Park and Preserve, Alaska. Southeast up the Valley of Ten Thousand Smokes, viewed from the Overlook Cabin. The valley is filled with up to 200 meters (660 feet) of ash-flow deposits from the June 1912 eruption of Novarupta Volcano. The rim of Katmai Caldera is on the left skyline. Photo by R. McGimsey, June 10, 1991. #1:/Schultz A.R. Collection/sar00721 ID. Schultz, A.R. 721 Coal prospect pit north of miner's cabin on divide east of East Beaver Creek. Summit County, Utah. 1914. #1:/Schultz A.R. Collection/sar00722 ID. Schultz, A.R. 722 Coal prospect west of miner's cabin showing relation to cabin. Summit County, Utah. 1914. #1:/Hawaii Volcanoes National Park/sda00004 ID. Swanson, D.A. 4 Hawaii Volcanoes National Park. February 1969 eruption of Kilauea Volcano. Lava lake in Alae Crater, viewed from its south rim. A program of drilling through the crust into the lake was begun in April 1969. This program was ended on May 24 when new lava flooded the crater, overwhelming the drilling equipment. March 21, 1969. Figure 7, U.S. Geological Survey Professional Paper 891. Photos sda00004, sda00005, sda00006, sda00007, and sda00008 form a panorama. #1:/Hawaii Volcanoes National Park/sda00005 ID. Swanson, D.A. 5 Hawaii Volcanoes National Park. February 1969 eruption of Kilauea Volcano. Lava lake in Alae Crater, viewed from its south rim. A program of drilling through the crust into the lake was begun in April 1969. This program was ended on May 24 when new lava flooded the crater, overwhelming the drilling equipment. March 21, 1969. Figure 7, U.S. Geological Survey Professional Paper 891. Photos sda00004, sda00005, sda00006, sda00007, and sda00008 form a panorama. #1:/Hawaii Volcanoes National Park/sda00006 ID. Swanson, D.A. 6 Hawaii Volcanoes National Park. February 1969 eruption of Kilauea Volcano. Lava lake in Alae Crater, viewed from its south rim. A program of drilling through the crust into the lake was begun in April 1969. This program was ended on May 24 when new lava flooded the crater, overwhelming the drilling equipment. March 21, 1969. Figure 7, U.S. Geological Survey Professional Paper 891. Photos sda00004, sda00005, sda00006, sda00007, and sda00008 form a panorama. #1:/Hawaii Volcanoes National Park/sda00007 ID. Swanson, D.A. 7 Hawaii Volcanoes National Park. February 1969 eruption of Kilauea Volcano. Lava lake in Alae Crater, viewed from its south rim. A program of drilling through the crust into the lake was begun in April 1969. This program was ended on May 24 when new lava flooded the crater, overwhelming the drilling equipment. March 21, 1969. Figure 7, U.S. Geological Survey Professional Paper 891. Photos sda00004, sda00005, sda00006, sda00007, and sda00008 form a panorama. #1:/Hawaii Volcanoes National Park/sda00008 ID. Swanson, D.A. 8 Hawaii Volcanoes National Park. February 1969 eruption of Kilauea Volcano. Lava lake in Alae Crater, viewed from its south rim. A program of drilling through the crust into the lake was begun in April 1969. This program was ended on May 24 when new lava flooded the crater, overwhelming the drilling equipment. March 21, 1969. Figure 7, U.S. Geological Survey Professional Paper 891. Photos sda00004, sda00005, sda00006, sda00007, and sda00008 form a panorama. #1:/Hawaii Volcanoes National Park/sda00009 ID. Swanson, D.A. 9 Hawaii Volcanoes National Park. February 1969 eruption of Kilauea Volcano. Makaopuhi Crater, showing a dark aa flow which erupted on February 22, 1969, covering 90 percent of the floor of the deep pit. The aa was fed by 230-meter high cascades, as part of a light-hued pahoehoe flow (lower right) spilled over the crater rim. The rest of the pahoehoe flow advanced down Chain of Craters Road (background), changing to aa. Note the fallen trees along the broad edge of the flow in the lower right. A prominent dark aa flow, center right, also erupted on February 22. March 1969. Figure 9, U.S. Geological Survey Professional Paper 891. #1:/Hawaii Volcanoes National Park/sda00010 ID. Swanson, D.A. 10 Hawaii Volcanoes National Park. February 1969 eruption of Kilauea Volcano. Lava drapery on the 230-meter high walls of Makaopuhi Crater, viewed from the floor of a deep pit. Note the talus cones at the base of the crater wall, built predominantly from falling fragments, with minor amounts of dislodged wallrock included. Steam rises from cooling aa on the floor of the crater. March 5, 1969. Figure 10, U.S. Geological Survey Professional Paper 891. #1:/Hawaii Volcanoes National Park/sda00011 ID. Swanson, D.A. 11 Hawaii Volcanoes National Park. February 1969 eruption of Kilauea Volcano. Aa flow that followed Chain of Craters Road southward from Makaopuhi Crater (right background). The road gradient is 4.6 meters per kilometer; flow is 23 meters thick. Kalapana Trail (left edge) parallels the road. Figure 11, U.S. Geological Survey Professional Paper 891. #1:/Hawaii Volcanoes National Park/sda00012 ID. Swanson, D.A. 12 Hawaii Volcanoes National Park. February 1969 eruption of Kilauea Volcano. Two-tier lava cascade into Alae Crater, viewed from the south rim. Lava (left) cascading 80 meters into the crater and lava from spurting fountains (visible near the right edge) join and pool on the mezzanine before plunging 50 meters into the inner pit (lower right corner). February 22, 1969. Figure 12, U.S. Geological Survey Professional Paper 891. #1:/Hawaii Volcanoes National Park/sda00013 ID. Swanson, D.A. 13 Hawaii Volcanoes National Park. February 1969 eruption of Kilauea Volcano. Opening of a fissure across Chain of Craters Road west of Alae Crater: #1:28 p.m., February 22, 1969, as a nearly straight fissure opens beneath it, the asphalt pavement responds irregularly. Photo by J.C. Forbes. Figure 13-A, U.S. Geological Survey Professional Paper 891. Photos sda00013, ska00014, sda00015, sda00016, and sda00017 form a sequence. #1:/Hawaii Volcanoes National Park/sda00014 ID. Swanson, D.A. 14 Hawaii Volcanoes National Park. February 1969 eruption of Kilauea Volcano. Opening of a fissure across Chain of Craters Road west of Alae Crater: #1:50 p.m., February 22, 1969, the uppermost layer of asphalt has buckled and slid across the underlying layer. The ground crack beneath the asphalt pavement (not shown) is about 10 centimeters wide. Photo by J.C. Forbes. Figure 13-B, U.S. Geological Survey Professional Paper 891. Photos sda00013, ska00014, sda00015, sda00016, and sda00017 form a sequence. #1:/Hawaii Volcanoes National Park/sda00015 ID. Swanson, D.A. 15 Hawaii Volcanoes National Park. February 1969 eruption of Kilauea Volcano. Opening of a fissure across Chain of Craters Road west of Alae Crater: #1:58 p.m., February 22, 1969, steam and fume issue from the fissure. Spatter falls on the road surface from fountains near the left edge of the pavement. Photo by J.C. Forbes. Figure 13-C, U.S. Geological Survey Professional Paper 891. Photos sda00013, ska00014, sda00015, sda00016, and sda00017 form a sequence. #1:/Hawaii Volcanoes National Park/sda00016 ID. Swanson, D.A. 16 Hawaii Volcanoes National Park. February 1969 eruption of Kilauea Volcano. Opening of a fissure across Chain of Craters Road west of Alae Crater: 2:01 p.m., February 22, 1969, lava surging from the fissure uplifts the pavement and wells out as a sluggish flow. Note the spatter clots flying through the air and steam issuing from the extension of the crack on the right side of the road. Photo by J.C. Forbes. Figure 13-D, U.S. Geological Survey Professional Paper 891. Photos sda00013, ska00014, sda00015, sda00016, and sda00017 form a sequence #1:/Hawaii Volcanoes National Park/sda00017 ID. Swanson, D.A. 17 Hawaii Volcanoes National Park. February 1969 eruption of Kilauea Volcano. Opening of a fissure across Chain of Craters Road west of Alae Crater: 2:08 p.m., February 22, 1969, lava fountains from the fissure extend into the forest on the right side of the road, setting fires and forming tree molds. The lava flow advances along the highway causing the asphalt to melt and, in places, burn. The asphalt pavement is buried by a thin flow and can commonly be located and mapped by observing the black discoloration of the flow due to tarry substances distilled from the asphalt. Photo by J.C. Forbes. Figure 13-E, U.S. Geological Survey Professional Paper 891. Photos sda00013, ska00014, sda00015, sda00016, and sda00017 form a sequence. #1:/Hawaii Volcanoes National Park/sda00018 ID. Swanson, D.A. 18 Hawaii Volcanoes National Park. February 1969 eruption of Kilauea Volcano. Small lobes of newly erupted aa pool at the base of the 40-meter high northwest wall of Napau Crater. Lava was erupted from vent E on the northeast slope of Kane Nui o Hamo, about 2 kilometers from the upper left corner. The floor of the crater is crusted lava which erupted on October 1968. Steam issues from one of the October fissures. Figure 14, U.S. Geological Survey Professional Paper 891. #1:/Hawaii Volcanoes National Park/sda00019 ID. Swanson, D.A. 19 Hawaii Volcanoes National Park. February 1969 eruption of Kilauea Volcano. Row of spatter cones formed during the night of February 22-23, 1969, extending westward from the west rim of Alae Crater. Chain of Craters Road is buried by new lava, almost all of which flowed toward the south (right), the prevailing slope direction. Photo by D. Reeser, National Park Service. Figure 15, U.S. Geological Survey Professional Paper 891. #1:/Hawaii Volcanoes National Park/sda00020 ID. Swanson, D.A. 20 Hawaii Volcanoes National Park. February 1969 eruption of Kilauea Volcano. New opening of a preexisting crack cutting the Chain of Craters Road 400 meters east of Aloi Crater, near the eruptive fissure. The measured amount of an opening at a station just off the road is 11.6 centimeters. Note the roots extending across the crack and the remnant of an asphalt patch used to cover the crack after it opened in December 1965. View is southwest. Figure 23, U.S. Geological Survey Professional Paper 891. #1:/Hawaii Volcanoes National Park/sda00021 ID. Swanson, D.A. 21 Hawaii Volcanoes National Park. February 1969 eruption of Kilauea Volcano. Master crack bounding a slump block that formed along the south edge of Alae Crater. Note subsidence and displacement toward the crater. Figure 24, U.S. Geological Survey Professional Paper 891. #1:/Hawaii Volcanoes National Park/sda00022 ID. Swanson, D.A. 22 Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. North along the trace of Ainahou Road buried by a lava flow which erupted from the fissure that crossed the road near the most distant figure on May 24, 1969. Lava trees (right edge) that line the trace of the road indicate the maximum height of the flow before it spread laterally and downslope. Kilauea. Figure 9, U.S. Geological Survey Professional Paper 1056. #1:/Hawaii Volcanoes National Park/sda00023 ID. Swanson, D.A. 23 Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Fountains play from eastern and western vents in the Mauna Ulu vent area. View is northeast from a point 400 meters east of Aloi Crater. Note the spatter ridge forming between the vents. May 28, 1969. Figure 10, U.S. Geological Survey Professional Paper 1056. #1:/Hawaii Volcanoes National Park/sda00024 ID. Swanson, D.A. 24 Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Craggy, furrowed spatter rampart between the western and eastern vents in the Mauna Ulu vent area, viewed from the south edge of the western vent. The peak of the rampart is about 10 meters above its base. The material in the foreground consists of partly welded spatter. It slumped toward the western vent when lava drained into the fissure after fountaining stopped on June 13, 1969. June 14, 1969. Figure 11, U.S. Geological Survey Professional Paper 1056. #1:/Hawaii Volcanoes National Park/sda00026 ID. Swanson, D.A. 26 Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Twin fountains in the Mauna Ulu vent area more than 200 meters high erupting during the early morning. Defoliated trees are silhouetted above the rapidly growing ridge of tephra downwind from the vent area. View is from the southwest. June 26, 1969. Figure 13, U.S. Geological Survey Professional Paper 1056. #1:/Hawaii Volcanoes National Park/sda00027 ID. Swanson, D.A. 27 Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Holei Pali, viewed from several hundred meters seaward of its base, showing a lava cascade. Note how lava, probably with a fluidity transitional between pahoehoe and aa, surges down the steep slope, much as water moving in a flume. Sticky aa flow (foreground) slowly advances from the base of the pali (step cliff) This flow entered the ocean several hours later. Visible height of the pali was about 220 meters. June 26, 1969. Photo by D.W. Reeser, National Park Service. Figure 14, U.S. Geological Survey Professional Paper 1056. #1:/Hawaii Volcanoes National Park/sda00028 ID. Swanson, D.A. 28 Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Flows which erupted on June 25-26, 1969, cover the Chain of Craters Road near the southwest rim of Alae Crater. The large crack offsetting the center line of the road formed during the February 1969 eruption. New flows cross a buried row of February 1969 spatter cones. Mauna Ulu vent area is hidden behind the trees on the right. 1969. Figure 15, U.S. Geological Survey Professional Paper 1056. #1:/Hawaii Volcanoes National Park/sda00029 ID. Swanson, D.A. 29 Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Spattering from a horseshoe-shaped cone at the west end of the western vent. A rock hammer is used to collect sticky, molten lava from a flow slowly advancing from the cone. 3:00 p.m., August 5, 1969. Figure 16, U.S. Geological Survey Professional Paper 1056. #1:/Hawaii Volcanoes National Park/sda00030 ID. Swanson, D.A. 30 Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Fifteen-meter-high fountain at the west end of a fissure feeding a flow that moves 15 meters toward the observer before plunging into a hole in the roof of the fissure. Lava also issues from a small hole in the right flank of a newly built spatter cone. August 15, 1969. Figure 17, U.S. Geological Survey Professional Paper 1056. #1:/Hawaii Volcanoes National Park/sda00037 ID. Swanson, D.A. 37 Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Devastated area downwind (south-southwest) from the Mauna Ulu vent area. A tephra deposit forms a hill. Covered with a lush hardwood forest before the eruption, the area is now buried beneath tens of centimeters of pumice. August 30, 1969. Figure 20, U.S. Geological Survey Professional Paper 1056. #1:/Hawaii Volcanoes National Park/sda00038 ID. Swanson, D.A. 38 Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Bark on the left side of an ohia tree was stripped away by falling, partly wind-driven pumice. Bits of pumice are embedded in the wood. The devastated area is 1 kilometer south-southwest of the Mauna Ulu vent area. August 30, 1969. Figure 21, U.S. Geological Survey Professional Paper 1056. #1:/Hawaii Volcanoes National Park/sda00045 ID. Swanson, D.A. 45 Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. East along a graben near Alae Crater and across the lava flow that entered the graben from Alae on September 7, 1969. The surface of the flow was higher, indicated by the terrace, before degassing and draining laterally and downward into the rubble-covered floor of the graben. September 8, 1969. Figure 23, U.S. Geological Survey Professional Paper 1056. #1:/Hawaii Volcanoes National Park/sda00048 ID. Swanson, D.A. 48 Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Piece of reticulite 15 centimeters in diameter caught in an ohia tree several kilometers downwind from the Mauna Ulu vent area. Reticulite was erupted on September 6, 1969, during a period of high fountaining. Figure 26, U.S. Geological Survey Professional Paper 1056. #1:/Hawaii Volcanoes National Park/sda00049 ID. Swanson, D.A. 49 Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. West along the eastern compartment of the Mauna Ulu vent area. The glow (white) below the overhang near the upper center comes from a spattering column of lava. Note the overhang on which the men stand, built since September 26 by the accretion of spatter and one overflow of a fissure. September 28, 1969. Figure 27, U.S. Geological Survey Professional Paper 1056. #1:/Hawaii Volcanoes National Park/sda00050 ID. Swanson, D.A. 50 Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Slump scars in welded spatter on the south flank of Puu Huluhulu. Spatter fell during vigorous directed fountaining on October 20, 1969; accumulated while still hot; and welded together to form a coherent fluid mass, which then slumped down the steep slope. November 1969. Figure 29, U.S. Geological Survey Professional Paper 1056. #1:/Hawaii Volcanoes National Park/sda00057 ID. Swanson, D.A. 57 Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. A crusted pool of lava occupies part of the vent basin above the eastern compartment. A slight drainback of lava has just begun, indicated by the lower level of the pool. Spatter in front of the man is generated by lava flowing back down the vent. The low mound to the left of the man is the top of a cone being built by spatter; this cone developed into the pedestal cone in photo sda00065. The low cone with a glowing (white) interior at the far end of the pool is built against a bridge separating the eastern and western (upper right) compartments. There is a jagged remnant of a cone at the west end of the western compartment in the extreme upper right corner. View is west from the east end of the western vent area. November 9, 1969. Figure 31, U.S. Geological Survey Professional Paper 1056. #1:/Hawaii Volcanoes National Park/sda00058 ID. Swanson, D.A. 58 Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Drainback and refilling of the eastern compartment of the Mauna Ulu vent area: drainback begins, exposing the top of the pedestal cone on the right, which has been drowned by the pooled lava. November 13, 1969. Figure 32-A, U.S. Geological Survey Professional Paper 1056. Photos sda00058, sda0059, sda00060, sda00061, sda00062, sda00063, sda00064, and sda00065 form a sequence. Time elapsed between photos sda00058 and sda00062 is two minutes; time between photos sda00062 and sda00064, three minutes. #1:/Hawaii Volcanoes National Park/sda00059 ID. Swanson, D.A. 59 Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Drainback and refilling of the eastern compartment of the Mauna Ulu vent area: vigorous spattering takes place as the level of the lava drops. November 13, 1969. Figure 32-B, U.S. Geological Survey Professional Paper 1056. Photos sda00058, sda0059, sda00060, sda00061, sda00062, sda00063, sda00064, and sda00065 form a sequence. Time elapsed between photos sda00058 and sda00062 is two minutes; time between photos sda00062 and sda00064, three minutes. #1:/Hawaii Volcanoes National Park/sda00060 ID. Swanson, D.A. 60 Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Drainback and refilling of the eastern compartment of the Mauna Ulu vent area: vigorous spattering takes place as the level of the lava drops; since the lava has withdrawn farther into the compartment, the spattering is finer, almost a spray. November 13, 1969. Figure 32-C, U.S. Geological Survey Professional Paper 1056. Photos sda00058, sda0059, sda00060, sda00061, sda00062, sda00063, sda00064, and sda00065 form a sequence. Time elapsed between photos sda00058 and sda00062 is two minutes; time between photos sda00062 and sda00064, three minutes. #1:/Hawaii Volcanoes National Park/sda00061 ID. Swanson, D.A. 61 Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Drainback and refilling of the eastern compartment of the Mauna Ulu vent area: spattering has stopped, and crusted lava pours into the compartment. November 13, 1969. Figure 32-D, U.S. Geological Survey Professional Paper 1056. Photos sda00058, sda0059, sda00060, sda00061, sda00062, sda00063, sda00064, and sda00065 form a sequence. Time elapsed between photos sda00058 and sda00062 is two minutes; time between photos sda00062 and sda00064, three minutes. #1:/Hawaii Volcanoes National Park/sda00062 ID. Swanson, D.A. 62 Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Drainback and refilling of the eastern compartment of the Mauna Ulu vent area: lava continues to drain into the compartment, but the top of a rising column of lava is visible at the base of a cone. November 13, 1969. Figure 32-E, U.S. Geological Survey Professional Paper 1056. Photos sda00058, sda0059, sda00060, sda00061, sda00062, sda00063, sda00064, and sda00065 form a sequence. Time elapsed between photo sda00058 and sda00062 is two minutes; time between photos sda00062 and sda00064, three minutes. #1:/Hawaii Volcanoes National Park/sda00063 ID. Swanson, D.A. 63 Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Drainback and refilling of the eastern compartment of the Mauna Ulu vent area: a rising lava column fills the compartment and projects slightly above its lip. November 13, 1969. Figure 32-F, U.S. Geological Survey Professional Paper 1056. Photos sda00058, sda0059, sda00060, sda00061, sda00062, sda00063, sda00064, and sda00065 form a sequence. Time elapsed between photos sda00058 and sda00062 is two minutes; time between photos sda00062 and sda00064, three minutes. #1:/Hawaii Volcanoes National Park/sda00064 ID. Swanson, D.A. 64 Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Drainback and refilling of the eastern compartment of the Mauna Ulu vent area: a dome fountain projects above the lava spilling outward from the compartment; the lava covers the top of the pedestal cone. November 13, 1969. Figure 32-G, U.S. Geological Survey Professional Paper 1056. Photos sda00058, sda0059, sda00060, sda00061, sda00062, sda00063, sda00064, and sda00065 form a sequence. Time elapsed between photos sda00058 and sda00062 is two minutes; time between photos sda00062 and sda00064, three minutes. #1:/Hawaii Volcanoes National Park/sda00065 ID. Swanson, D.A. 65 Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Eastern compartment of Mauna Ulu vent area after activity had ceased. The eastern compartment and pedestal cone are viewed from the southwest from a slightly different location (chiefly lower) than in the previous photographs in the sequence. November 14, 1969. Figure 32-H, U.S. Geological Survey Professional Paper 1056. Photos sda00058, sda0059, sda00060, sda00061, sda00062, sda00063, sda00064, and sda00065 form a sequence. Time elapsed between photos sda00058 and sda00062 is two minutes; time between photos sda00062 and sda00064, three minutes. #1:/Hawaii Volcanoes National Park/sda00066 ID. Swanson, D.A. 66 Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Tilted slabs of welded spatter blanketed by pumice and spatter erupted on October 20 and, mainly, December 30, 1969. Note the contrast between the chaotic terrain in the foreground and the undisturbed bedding in the tephra in the background. The chaotic area is at head of the rootless aa flow generated on September 6-7, 1969. March 1970. Figure 35, U.S. Geological Survey Professional Paper 1056. #1:/Hawaii Volcanoes National Park/sda00067 ID. Swanson, D.A. 67 Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Lava puddle approaches the display case at a tourist overlook at Aloi Crater. The crater is not yet filled; the puddle was erupted from a fissure outside the crater. Note a new crack cutting the pavement between the two posts. 9:00 a.m., April 9, 1970. Figure 36, U.S. Geological Survey Professional Paper 1056. #1:/Hawaii Volcanoes National Park/sda00070 ID. Swanson, D.A. 70 Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Driblet spires in Aloi Crater formed on May 21, 1970. Whether the spires are hornitos or cones built over true vents is not known. Figure 39, U.S. Geological Survey Professional Paper 1056. #1:/Hawaii Volcanoes National Park/sda00075 ID. Swanson, D.A. 75 Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. North over the subsidence bowl at Alae Crater, showing a fume cloud billowing from the Mauna Ulu trench and the summit crater and a smaller cloud from a skylight in the roof of the inlet tube to the crater. Open cracks parallel the northeast margin of the subsidence bowl, and lobate ridges of thrust-fault origin occur closer to the center of the bowl. The dark area in the lower left is a new collapse area. March 28, 1971. Figure 45, U.S. Geological Survey Professional Paper 1056. #1:/Hawaii Volcanoes National Park/sda00076 ID. Swanson, D.A. 76 Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. West over the trench, with the summit crater of Mauna Ulu in the background. The jagged pile of rubble separating the trench from the crater is barely visible through the fume. Cracks bound incipient slump blocks. The trench is about 530 meters long from the east end to the rubbly partition. May 25, 1971. Figure 46, U.S. Geological Survey Professional Paper 1056. #1:/Hawaii Volcanoes National Park/sda00079 ID. Swanson, D.A. 79 Hawaii Volcanoes National Park. Technique for measuring depth to the surface of Mauna Ulu's lava lake. A person sights with a rangefinder to a distinctive point on the lake surface, and the vertical angle to the point is measured with a clinometer. The depth is the product of sine of the angle and the rangefinder distance. Repeated measurements to various points were averaged to reduce observational errors. Note the septum separating the east end of the crater from the fuming trench. July 1971. Figure 49, U.S. Geological Survey Professional Paper 1056. #1:/Hawaii Volcanoes National Park/sda00080 ID. Swanson, D.A. 80 Hawaii Volcanoes National Park. 1969-1971 Mauna Ulu eruption of Kilauea Volcano. Flat-topped ridge dividing a lava lake into two pools, viewed from the north rim of Mauna Ulu crater. Note that the east pool (left) is higher than the west pool and encroaches on the ridge. The depth to the surface of the east pool is 87 meters; the ridge is 6 to 10 meters wide. The photograph was taken on the day the ridge first appeared. The ledges on the crater wall record past levels of the lake surface. July 17, 1971. Figure 50, U.S. Geological Survey Professional Paper 1056. #1:/Sterrett D.B. Collection-Mica Hill Mica Mine/sdb00104 ID. Sterrett, D.B. 104 Mica Hill mica mine - 4 miles northwest of Canyon City. Mica is in irregularly vertical streak in back of cut and over two figures. Mica in mass of bunches wedge and "A" shaped blocks.J.D. Endicott seated in foreground. Fremont County, Colorado. 1910. #1:/Sterrett D.B. Collection-Colorado Turquoise Mining Company/sdb00127 ID. Sterrett, D.B. 127 Looking north towards Colorado Turquoise Mining Company mines, 13 miles south 60 degrees east of La Jara. Shafts near office and to right on hill. Incline to right of framework, about center of picture. Conejos County, Colorado. 1910. #1:/Petrified Forest National Park/sdb00128 ID. Sterrett, D.B. 128 Petrified Forest National Park, Arizona. Sections of a large tree, 5.5 feet or more in diameter, lying in volcanic ash about 6 miles south of Adamana. #1:/Fossils/sdl00003 ID. Schmidt, D.L. 3ct Fossils. Fossil Glossopteris leaf associated with coal deposits and derived from glossopterid forests of the Permian age. Found at Polarstar Peak in the Ellsworth Mountains in Antarctica. 1965. #1:/Glacier National Park/sec00318 ID. Stebinger, E.C. 318 Glacier National Park, Montana. Looking northeast over the upper end of Harrison Lake to the head of Harrison Creek. July 1914. #1:/Glacier National Park/sec00319 ID. Stebinger, E.C. 319 Glacier National Park, Montana. Looking northwest from the ridge just west of Thompson Mountain towards Harrison Glacier terminus. July 1914. #1:/Glacier National Park/sec00322 ID. Stebinger, E.C. 322 Glacier National Park, Montana. Cirque and wing walls on the north slope of Mount Stimpson, looking south across Nyack Creek. July 1914. See also photo sec00323. #1:/Glacier National Park/sec00323 ID. Stebinger, E.C. 323 Glacier National Park, Montana. Back wall of the cirque shown in photo sec00322. Mount Stimpson. July 1914. #1:/Glacier National Park/sec00325 ID. Stebinger, E.C. 325 Glacier National Park, Montana. Looking southwest along the foot of Pumpelly Glacier to Blackfoot Mountain. July 1914. Photos sec00325, sec0325a, sec0325b, sec0325c, sec0325d, sec0325e, sec00327 form a panorama. #1:/Glacier National Park/sec00327 ID. Stebinger, E.C. 327 Glacier National Park, Montana. From Blackfoot Mountain: Pumpelly Glacier (photo sec00325) to Flinsch Peak (photo sec0325e); Pumpelly Glacier to Red Eagle Pass (photo sec0325a); Red Eagle Pass and Norris Mountain (photo sec0325b); Triple Divide Peak (photo sec0325c); Razoredge Mountain and Tinkham Mountain (photo sec0325d); Mount Morgan and Flinsch Peak (photo sec0325e). July 1914. Photos sec00325, sec0325a, sec0325b, sec0325c, sec0325d, sec0325e, sec00327 form a panorama. #1:/Glacier National Park/sec00328 ID. Stebinger, E.C. 328 Glacier National Park, Montana. Pumpelly Glacier, from side of cirque. Blackfoot Mountain on the left (photo sec00328). Mount Logan on the right (photo sec0328b). July 1914. Photos sec00328, sec0328a, sec0328b form a panorama. #1:/Glacier National Park/sec00331 ID. Stebinger, E.C. 331 Glacier National Park, Montana. Flinsch Peak, viewed from the north at the head of Cut Bank Creek (Dry Fork?). Photo by C.S. Corbett. July 1914. #1:/Glacier National Park/sec00337 ID. Stebinger, E.C. 337 Glacier National Park, Montana. Northwest at the upper end of Red Eagle Valley, 2 miles southeast of Red Eagle Glacier. Trail in the center. Almost-a-Dog Mountain in the rear. July 1914. #1:/Glacier National Park/sec00338 ID. Stebinger, E.C. 338 Glacier National Park, Montana. Vegetation bands on a ledge of nearly horizontal Siyeh Limestone on Red Eagle cirque 1.5 miles southeast of Red Eagle Glacier. White ledge of massive bed on cirque floor at left center. July 1914. #1:/Glacier National Park/sec00341 ID. Stebinger, E.C. 341 Glacier National Park, Montana. North-northwest across upper Red Eagle Valley: Almost-a-Dog Mountain on the left to Red Eagle Mountain on the right. West- dipping ledge of massive bed can be followed through the center. July 1914. Photos sec00341, sec0341a, sec0341b form a panorama. #1:/Glacier National Park/sec00344 ID. Stebinger, E.C. 344 Glacier National Park, Montana. West over Blackfoot Glacier from the Continental Divide: Blackfoot Mountain on the left (photo sec00344). Harrison Glacier and Jackson Mountain in the right distance (photo sec0344c). July 1914. Photos sec00344, sec0344a, sec0344b, sec0344c form a panorama. #1:/Glacier National Park/sec00345 ID. Stebinger, E.C. 345 Glacier National Park, Montana. From a point half a mile west and 1,000 feet higher than photo sec00344: Jackson Mountain in the center (photo sec0345a) and Reynolds Mountain on the extreme right (photo sec0345b). July 1914. Photos sec00345, sec0354a, sec0345b form a panorama. #1:/Glacier National Park/sec00347 ID. Stebinger, E.C. 347 Glacier National Park, Montana. West from the summit of Red Eagle Mountain: Going-to-the-Sun Mountain in the center (photo sec0347a) and Great Northern Railroad chalets on Upper Saint Mary Lake beneath it. Photo by C.S. Corbett. August 1914. Photos sec00347, sec0347a, sec0347b form a panorama. #1:/Glacier National Park/sec00349 ID. Stebinger, E.C. 349 Glacier National Park, Montana. West from the south slope of Piegan Mountain: Reynolds Mountain in the center and Clements Mountain on the right. August 1914. Photos sec00349, sec0349a, sec0349b form a panorama. #1:/Glacier National Park/sec00359 ID. Stebinger, E.C. 359 Glacier National Park, Montana. Barrier beach and lagoon on the south shore of Upper Saint Mary Lake at the Narrows. August 1914. #1:/Glacier National Park/sec00378 ID. Stebinger, E.C. 378 Glacier National Park, Montana. Chief Mountain from the northeast, viewed from East Fork Lee Creek. September 1914. Figure 140, U.S. Geological Survey Professional Paper 294-K. #1:/Glacier National Park/sec00383 ID. Stebinger, E.C. 383 Glacier National Park, Montana. West over Ipashd Glacier, which lies just southeast of Chaney Glacier at the head of the Mokowanis River. September 1914. Photos sec00383 and sec0383a form a panorama. #1:/Glacier National Park/sec00400 ID. Stebinger, E.C. 400 Glacier National Park, Montana. Mud cracks in Grinnell Limestone. August 1914. #1:/Glacier National Park/sec00403 ID. Stebinger, E.C. 403 Glacier National Park, Montana. Contorted Grinnell Argillite on the north wall of the cirque on the south slope of Mount Thompson. 1914. Figure 25, U.S. Geological Survey Professional Paper 296. #1:/Glacier National Park/sec00405 ID. Stebinger, E.C. 405 Glacier National Park, Montana. Folding in Grinnell in the cliff at the south end of Avalanche Basin, 3 or 4 miles north of Sperry Glacier. July 1914. Photos sec00405 and sec0405a form a panorama. #1:/Glacier National Park/sec00406 ID. Stebinger, E.C. 406 Glacier National Park, Montana. Terminal moraine at the foot of a small glacier on the north slope of Jackson Mountain. July 1914. #1:/Glacier National Park/sec0325a ID. Stebinger, E.C. 325a Glacier National Park, Montana. From Blackfoot Mountain: Pumpelly Glacier (photo sec00325) to Flinsch Peak (photo sec0325e); Pumpelly Glacier to Red Eagle Pass (photo sec0325a); Red Eagle Pass and Norris Mountain (photo sec0325b); Triple Divide Peak (photo sec0325c); Razoredge Mountain and Tinkham Mountain (photo sec0325d); Mount Morgan and Flinsch Peak (photo sec0325e). July 1914. Photos sec00325, sec0325a, sec0325b, sec0325c, sec0325d, sec0325e, sec00327 form a panorama. #1:/Glacier National Park/sec0325b ID. Stebinger, E.C. 325b Glacier National Park, Montana. From Blackfoot Mountain: Pumpelly Glacier (photo sec00325) to Flinsch Peak (photo sec0325e); Pumpelly Glacier to Red Eagle Pass (photo sec0325a); Red Eagle Pass and Norris Mountain (photo sec0325b); Triple Divide Peak (photo sec0325c); Razoredge Mountain and Tinkham Mountain (photo sec0325d); Mount Morgan and Flinsch Peak (photo sec0325e). July 1914. Photos sec00325, sec0325a, sec0325b, sec0325c, sec0325d, sec0325e, sec00327 form a panorama. #1:/Glacier National Park/sec0325c ID. Stebinger, E.C. 325c Glacier National Park, Montana. From Blackfoot Mountain: Pumpelly Glacier (photo sec00325) to Flinsch Peak (photo sec0325e); Pumpelly Glacier to Red Eagle Pass (photo sec0325a); Red Eagle Pass and Norris Mountain (photo sec0325b); Triple Divide Peak (photo sec0325c); Razoredge Mountain and Tinkham Mountain (photo sec0325d); Mount Morgan and Flinsch Peak (photo sec0325e). July 1914. Photos sec00325, sec0325a, sec0325b, sec0325c, sec0325d, sec0325e, sec00327 form a panorama. #1:/Glacier National Park/sec0325d ID. Stebinger, E.C. 325d Glacier National Park, Montana. From Blackfoot Mountain: Pumpelly Glacier (photo sec00325) to Flinsch Peak (photo sec0325e); Pumpelly Glacier to Red Eagle Pass (photo sec0325a); Red Eagle Pass and Norris Mountain (photo sec0325b); Triple Divide Peak (photo sec0325c); Razoredge Mountain and Tinkham Mountain (photo sec0325d); Mount Morgan and Flinsch Peak (photo sec0325e). July 1914. Photos sec00325, sec0325a, sec0325b, sec0325c, sec0325d, sec0325e, sec00327 form a panorama. #1:/Glacier National Park/sec0325e ID. Stebinger, E.C. 325e Glacier National Park, Montana. From Blackfoot Mountain: Pumpelly Glacier (photo sec00325) to Flinsch Peak (photo sec0325e); Pumpelly Glacier to Red Eagle Pass (photo sec0325a); Red Eagle Pass and Norris Mountain (photo sec0325b); Triple Divide Peak (photo sec0325c); Razoredge Mountain and Tinkham Mountain (photo sec0325d); Mount Morgan and Flinsch Peak (photo sec0325e). July 1914. Photos sec00325, sec0325a, sec0325b, sec0325c, sec0325d, sec0325e, sec00327 form a panorama. #1:/Glacier National Park/sec0328a ID. Stebinger, E.C. 328a Glacier National Park, Montana. Pumpelly Glacier, from side of cirque. Blackfoot Mountain on the left (photo sec00328). Mount Logan on the right (photo sec0328b). July 1914. Photos sec00328, sec0328a, sec0328b form a panorama. #1:/Glacier National Park/sec0328b ID. Stebinger, E.C. 328b Glacier National Park, Montana. Pumpelly Glacier, from side of cirque. Blackfoot Mountain on the left (photo sec00328). Mount Logan on the right (photo sec0328b). July 1914. Photos sec00328, sec0328a, sec0328b form a panorama. #1:/Glacier National Park/sec0341a ID. Stebinger, E.C. 341a Glacier National Park, Montana. North-northwest across upper Red Eagle Valley: Almost-a-Dog Mountain on the left to Red Eagle Mountain on the right. West- dipping ledge of massive bed can be followed through the center. July 1914. Photos sec00341, sec0341a, sec0341b form a panorama. #1:/Glacier National Park/sec0341b ID. Stebinger, E.C. 341b Glacier National Park, Montana. North-northwest across upper Red Eagle Valley: Almost-a-Dog Mountain on the left to Red Eagle Mountain on the right. West- dipping ledge of massive bed can be followed through the center. July 1914. Photos sec00341, sec0341a, sec0341b form a panorama. #1:/Glacier National Park/sec0344a ID. Stebinger, E.C. 344a Glacier National Park, Montana. West over Blackfoot Glacier from the Continental Divide: Blackfoot Mountain on the left (photo sec00344). Harrison Glacier and Jackson Mountain in the right distance (photo sec0344c). July 1914. Photos sec00344, sec0344a, sec0344b, sec0344c form a panorama. #1:/Glacier National Park/sec0344b ID. Stebinger, E.C. 344b Glacier National Park, Montana. West over Blackfoot Glacier from the Continental Divide: Blackfoot Mountain on the left (photo sec00344). Harrison Glacier and Jackson Mountain in the right distance (photo sec0344c). July 1914. Photos sec00344, sec0344a, sec0344b, sec0344c form a panorama. #1:/Glacier National Park/sec0344c ID. Stebinger, E.C. 344c Glacier National Park, Montana. West over Blackfoot Glacier from the Continental Divide: Blackfoot Mountain on the left (photo sec00344). Harrison Glacier and Jackson Mountain in the right distance (photo sec0344c). July 1914. Photos sec00344, sec0344a, sec0344b, sec0344c form a panorama. #1:/Glacier National Park/sec0345a ID. Stebinger, E.C. 345a Glacier National Park, Montana. From a point half a mile west and 1,000 feet higher than photo sec00344: Jackson Mountain in the center (photo sec0345a) and Reynolds Mountain on the extreme right (photo sec0345b). July 1914. Photos sec00345, sec0354a, sec0345b form a panorama. #1:/Glacier National Park/sec0345b ID. Stebinger, E.C. 345b Glacier National Park, Montana. From a point half a mile west and 1,000 feet higher than photo sec00344: Jackson Mountain in the center (photo sec0345a) and Reynolds Mountain on the extreme right (photo sec0345b). July 1914. Photos sec00345, sec0354a, sec0345b form a panorama. #1:/Glacier National Park/sec0347a ID. Stebinger, E.C. 347a Glacier National Park, Montana. West from the summit of Red Eagle Mountain: Going-to-the-Sun Mountain in the center (photo sec0347a) and Great Northern Railroad chalets on Upper Saint Mary Lake beneath it. Photo by C.S. Corbett. August 1914. Photos sec00347, sec0347a, sec0347b form a panorama. #1:/Glacier National Park/sec0347b ID. Stebinger, E.C. 347b Glacier National Park, Montana. West from the summit of Red Eagle Mountain: Going-to-the-Sun Mountain in the center (photo sec0347a) and Great Northern Railroad chalets on Upper Saint Mary Lake beneath it. Photo by C.S. Corbett. August 1914. Photos sec00347, sec0347a, sec0347b form a panorama. #1:/Glacier National Park/sec0349a ID. Stebinger, E.C. 349A Glacier National Park, Montana. West from the south slope of Piegan Mountain: Reynolds Mountain in the center and Clements Mountain on the right. August 1914. Photos sec00349, sec0349a, sec0349b form a panorama. #1:/Glacier National Park/sec0349b ID. Stebinger, E.C. 349B Glacier National Park, Montana. West from the south slope of Piegan Mountain: Reynolds Mountain in the center and Clements Mountain on the right. August 1914. Photos sec00349, sec0349a, sec0349b form a panorama. #1:/Stebinger T.E. Collection-Glacier National Park and Preserve/sec0349c ID. Stebinger, E.C. 349C Looking west from south slope of Piegan Mountain. Reynolds Mountain in center. Clements Mountain on right. Glacier National Park and Preserve. Glacier County, Montana. August 1914. #1:/Glacier National Park/sec0353a ID. Stebinger, E.C. 353A Glacier National Park, Montana. North from the head of Avalanche Basin. Most of the rock shown belongs to the Siyeh Limestone. The dark peak on the left consists of beds belonging to the Missoula Group. Conophyton zone 1 and a sill of metagabbro are visible in the upper part of the cliffs. Note the pronounced discordance between the nearly flat basin floor on the right and the cliffed gorge on the left. August 1914. Portion of Figure 16, U.S. Geological Survey Professional Paper 296. Photos sec00353, sec0353a, sec0353b form a panorama. #1:/Glacier National Park/sec0353b ID. Stebinger, E.C. 353B Glacier National Park, Montana. North from the head of Avalanche Basin. Most of the rock shown belongs to the Siyeh Limestone. The dark peak on the left consists of beds belonging to the Missoula Group. Conophyton zone 1 and a sill of metagabbro are visible in the upper part of the cliffs. Note the pronounced discordance between the nearly flat basin floor on the right and the cliffed gorge on the left. August 1914. Portion of Figure 16, U.S. Geological Survey Professional Paper 296. Photos sec00353, sec0353a, sec0353b form a panorama. #1:/Glacier National Park/sec0383a ID. Stebinger, E.C. 383a Glacier National Park, Montana. West over Ipashd Glacier, which lies just southeast of Chaney Glacier at the head of Mokowanis River. September 1914. Photos sec00383 and sec0383a form a panorama. #1:/Glacier National Park/sec0405a ID. Stebinger, E.C. 405a Glacier National Park, Montana. Folding in Grinnell in the cliff at the south end of Avalanche Basin, 3 or 4 miles north of Sperry Glacier. July 1914. Photos sec00405 and sec0405a form a panorama. #1:/Spieker E.M. Collection-Wattis Mine/sem00027 ID. Spieker, E.M. 27 Safety gate at mouth of Wattis mine. Carbon County, Utah.n.d. #1:/Spieker E.M. Collection/sem00028 ID. Spieker, E.M. 28 Side view of safety gate, showing "trip" passing through. Carbon County, Utah. Not later than 1926. #1:/Spieker E.M. Collection-Wattis Mine/sem00030 ID. Spieker, E.M. 30 Tramway at Wattis, showing loaded "trip" starting down. Carbon County, Utah. Not later than 1926. #1:/Spieker E.M. Collection-Larsen Mine/sem00032 ID. Spieker, E.M. 32 Massive roof of Castlegate coal bed at mouth of Larsen mine, in Sec. 2, T. 15 S., R. 6 E.,. Carbon County, Utah.n.d. #1:/Spieker E.M. Collection-Utah Fuel Company-Clear Creek Mine/sem00258 ID. Spieker, E.M. 258 Utah Fuel Company's Clear Creek mine. Note piles of mine-timber in foreground. Carbon County, Utah. ca 1923. #1:/Spieker E.M. Collection-Wattis Mine/sem0026a ID. Spieker, E.M. 26a Wattis coal bed, exposed in cut at mine mouth, showing gradual pinching out of coal toward out crop. At the extreme left the coal is 10 feet thick. Carbon County, Utah. Not later than 1926. #1:/Spieker E.M. Collection/sem00279 ID. Spieker, E.M. 279 Original entry of Utah Mine, Pleasant Valley, cut about 1880 by Chinese hand labor. Even arch of roof, now used as air-course. Carbon County, Utah. Not later than 1926. #1:/Spieker E.M. Collection-Utah Mine/sem00283 ID. Spieker, E.M. 283 Dike in Utah Mine, showing coking of adjacent coal. Note dike of coal. Carbon County, Utah. Not later than 1926. #1:/Spieker E.M. Collection-Winterquarters Mine/sem00284 ID. Spieker, E.M. 284 Dike in Winterquarters mine, showing aureole of coke and coke and swelling of dike in coal. Carbon County, Utah. Not later than 1926. #1:/Spieker E.M. Collection-Winterquarters Mine/sem00285 ID. Spieker, E.M. 285 Dike in Winterquarters mine, showing branching finger and included coke. Carbon County, Utah. Not later than 1926. #1:/Spieker E.M. Collection-Winterquarters Mine/sem00286 ID. Spieker, E.M. 286 Dike in Winterquarters mine, showing tremendous swelling of dike in coal. Bottle-neck exit of dike into overlying sandstone. Carbon County. Utah. Not later than 1926. #1:/Spieker E.M. Collection-Winterquarters Mine/sem00287 ID. Spieker, E.M. 287 Dike in Winterquarters mine. Note thin layer of coke, showing slight effect of heat of dike on coal. Carbon County, Utah. Not later than 1926. #1:/Shaw E.W. Collection/sew01281 ID. Shaw, E.W. 1281 Exposure of loess showing how it stands in vertical cliffs, yet erodes where a trickle of water seeps over the cliff top. The upper one-third is stratified and distinct from the lower part. Warren County, Mississippi. 1915. #1:/Dry Tortugas National Park/sew01372 ID. Shaw, E.W. 1372 Dry Tortugas National Park, Florida. Distant view of Fort Jefferson. The view indicates the permanence of some of the keys, especially when reinforced. This structure is very massive, the walls being several feet thick, and it has stood for three-quarters of a century or more. The buildings at the sides are naval coaling stations, which were wrecked in 1910 by a hurricane. The material beneath the fort is, so far as known, unconsolidated lime carbonate sand, but some parts of it are probably cemented. July 18, 1915 #1:/Dry Tortugas National Park/sew01373 ID. Shaw, E.W. 1373 Dry Tortugas National Park, Florida. Wall and ditch at Fort Jefferson of medieval or ancient appearance. July 18, 1915. #1:/Dry Tortugas National Park/sew01374 ID. Shaw, E.W. 1374 Dry Tortugas National Park, Florida. Another side of Fort Jefferson. Some sand, such as that covered with bushes in the distance, has been thrown up outside the wall and is constantly shifting. July 18, 1915. #1:/Dry Tortugas National Park/sew01375 ID. Shaw, E.W. 1375 Dry Tortugas National Park, Florida. Interior of Fort Jefferson. July 19, 1915. #1:/Dry Tortugas National Park/sew01385 ID. Shaw, E.W. 1385 Dry Tortugas National Park, Florida. Layers of cemented beach rock at the Loggerhead lighthouse wharf on the west side of Loggerhead Key. July 22, 1915. #1:/Dry Tortugas National Park/sew01397 ID. Shaw, E.W. 1397 Dry Tortugas National Park, Florida. View into the water off the wharf at Loggerhead Key to show the freedom of the sea water from fine sediment. The photograph was taken about a week after rough seas, but the water is so clear that the fish and garbage from the cook house are very distinct. July 29, 1915 #1:/Dry Tortugas National Park/sew01398 ID. Shaw, E.W. 1398 Dry Tortugas National Park, Florida. Lighthouse on Loggerhead Key, viewed from the windmill at Tortugas Laboratory, looking southwest. July 30, 1915. #1:/Dry Tortugas National Park/sew01399 ID. Shaw, E.W. 1399 Dry Tortugas National Park, Florida. Beach rock on the west side of Loggerhead Key near the lighthouse, looking toward the windmill. The rock extends from a few feet above high tide to perhaps a great many feet below low tide. July 30, 1915 #1:/Dry Tortugas National Park/sew01407 ID. Shaw, E.W. 1407 Dry Tortugas National Park, Florida. Loggerhead Key, viewed from the north opposite the windmill. 1915. #1:/Schrader Collection/sfc00039 ID. Schrader, F.C. 39 Port Valdes. Captured Sperm Whale (ventral view), length 30 feet. North Beach with Valdes in left background, looking east. Valdez District, Alaska Gulf Region, Alaska. 1898. #1:/Schrader Collection/sfc00040 ID. Schrader, F.C. 40 Port Valdes. Giant Rocks, showing dip of strata and light colored dikes. Stream from Valdes Glacier in foreground. From north beach, ebb tide, looking north 88 degrees west along strike. Mineral creek in right, Valdes narrows in distant left. Valdez District, Alaska Gulf Region, Alaska. 1898. #1:/Alaska/sfc00043 ID. Schrader, F.C. 43 Interior of our tent at Valdez; note man sleeping in background. Cook Inlet region, Alaska. 1896. #1:/Alaska/sfc00045 ID. Schrader, F.C. 45 Fourth of July, baseball game between expedition members and prospectors, man trying to return to second; canvas backstop, from center field. Port Valdez, Cook Inlet region, Alaska. 1898. #1:/Schrader Collection/sfc00114 ID. Schrader, F.C. 114 On Copper River, from one mile below camp 31, opposite mouth of Chittyna River. Looking north 60 degrees east up and across Copper River. Showing delta and mouth of Chittyna coping in on right. Mt. Blackburn (Snowy) to right of center, Lowe Mountain Range and nearer foothills crossing field. Copper River comes in on left between slope of near bluff and low point of lake beds on opposite side above Chittyna. Mountains in near right expend southward back of Taral. Klute District, Copper River Region, Alaska. 1898. #1:/Schrader Collection/sfc00115 ID. Schrader, F.C. 115 On Copper River, Stickman Indian Natives. Family and house. At Camp 32, one mile above Taral. Looking southwest. The Tall Young man is named Goodlatah. Klute District, Copper River Region, Alaska. 1898. #1:/Schrader Collection/sfc00116 ID. Schrader, F.C. 116 On Copper River. Stickman Indian Natives. Family, Dogs, House, and Fish Ricks. At Camp 32, one mile above Tral. Looking southwest. The Tall Young man is named Goodlatah. Klute District, Copper River Region, Alaska. 1898. #1:/Schrader Collection/sfc00117 ID. Schrader, F.C. 117 On Copper River. From bluff 3/8 mile above Taral east looking north 19 degrees east up the Copper River. Showing flats and river in foreground. Chittyna Point in right of center, last of lake bed bluffs on opposite side, in left. Foothills, mountains and Mt. Blackburn in right, and Mt. Drum in far background left of center. Klute District, Copper River Region, Alaska. 1898. #1:/Alaska-Bulletin 532/sfc00258 ID. Schrader, F.C. 258 Rapids on Chandalar River, 128 miles above mouth. Chandalar district, Yukon region, Alaska. 1899. Plate 4-B in U.S. Geological Survey. Bulletin 532. 1913. Plate 61-A in U.S. Geological Survey. 21st Annual Report, part 2. 1900. #1:/Schrader Collection/sfc00347 ID. Schrader, F.C. 347 Gens de Large River Indian Natives, at Camp 29, on Robert Creek. Looking south. Klute District, Copper River Region, Alaska. 1898. #1:/Schrader Collection/sfc00348 ID. Schrader, F.C. 348 Gens de Large River Indian Native (named Robert). At Camp 29, on Robert Creek, looking southeast. Klute District, Copper River Region, Alaska. 1898. #1:/Alaska-Bulletin 532/sfc00359 ID. Schrader, F.C. 359 Limestone and schist contact in Endicott Mountains, looking north-northeast from Horace Mountain. Light-colored mountains in background are limestone. Wiseman district, Yukon region, Alaska. 1899. Plate 6-A in U.S. Geological Survey. Bulletin 532. 1913. Plate 63-B in U.S. Geological Survey. 21st Annual Report, part 2. 1900. #1:/Alaska-Bulletin 532/sfc00394 ID. Schrader, F.C. 394 Endicott Mountains, in upper Dietrich River Valley. Wiseman district, Yukon region, Alaska. 1899. Plate 4-A in U.S. Geological Survey. Bulletin 532. 1913. Plate 65-A in U.S. Geological Survey. 21st Annual Report, part 2. 1900. #1:/Alaska-Bulletin 532/sfc00419 ID. Schrader, F.C. 419 Flats on middle fork of Koyukuk River, Hughes district, Yukon region, Alaska. 1899. Plate 3-B in U.S. Geological Survey. Bulletin 532. 1913. Plate 66-A in U.S. Geological Survey. 21st Annual Report, part 2. 1900. #1:/Schrader Collection/sfc00495 ID. Schrader, F.C. 495 West end of Batzikakat Mountains, and Cone Mountain. 250 miles above mouth of Koyukuk River, looking north 15 degrees west. Alaska. 1898. #1:/Schrader Collection/sfc00496 ID. Schrader, F.C. 496 Group of Koyukuk Indian Natives, at native village, 195 miles above mouth of Koyukuk River. Alaska. 1898. #1:/Schrader Collection/sfc00497 ID. Schrader, F.C. 497 Group of Koyukuk Indian Natives, at native village, on left bank of Koyukuk River, 195 miles above its mouth. Alaska. September 6, 1898. #1:/Schrader Collection/sfc00498 ID. Schrader, F.C. 498 View down Koyukuk River, wsith steamer Kyle in distance. From native village, below Camp 56, 195 miles above mouth of Koyukuk. Alaska. September 6, 1898. #1:/Schrader Collection/sfc00547 ID. Schrader, F.C. 547 West part of Nome and beach, with snow covered west Point 15 miles distant. From near middle of beach in front of Nome, looking north 65 degrees west. Nome quad. Nome District, Seward Pennisula Region, Alaska. ca. 1899. #1:/Schrader Collection/sfc00548 ID. Schrader, F.C. 548 Eastern part of Nome and beach, with Cape Nome 15 miles distant. From near middle of beach in front of Nome. Looking south 84 degrees east. Nome quad. Nome District, Seward Pennisula Region, Alaska. ca. 1899. #1:/Schrader Collection/sfc00549 ID. Schrader, F.C. 549 Beach and tundra east of Nome, with Cape Nome 12 miles distant. From east of Nome, looking north 75 degrees east. Nome quad. Nome District, Seward Pennisula Region, Alaska. October 1, 1899. #1:/Schrader Collection/sfc00550 ID. Schrader, F.C. 550 Nome Tundra, Nome, and a part of Bering Sea, with Sledge Island in right. From Tundra Terrace, 2 miles northeast of Nome. Looking south 75 degrees west. Nome quad. Nome District, Seward Pennisula Region, Alaska. October 1, 1899. #1:/Alaska-Bulletin 335/sfc00661 ID. Schrader, F.C. 661 Volcanic plug at the south end of Kayak Island, Katalla district, Alaska Gulf region, Alaska. 1905. Plate 4-A in U.S. Geological Survey. Bulletin 335. 1908. #1:/Schrader Collection/sfc00662 ID. Schrader, F.C. 662 Half Breed [White and Indian] children of Prince William Sound, on Goose Island. Prince William Sound, Alaska. ca. 1899. #1:/Schrader Collection/sfc00663 ID. Schrader, F.C. 663 Half Breed [White and Indian] children of Prince William Sound, on Goose Island. Prince William Sound, Alaska. ca. 1899. #1:/Schrader Collection/sfc00666 ID. Schrader, F.C. 666 Dutch Flats, valley and mountain, looking upstream north 70 degrees east. Alaska. ca. 1899. #1:/Schrader Collection/sfc00667 ID. Schrader, F.C. 667 Dutch Flats, Terraces and Benching, on Lowe River, from trail near Thompson Pass. Looking south 60 degrees. Alaska. ca. 1899. #1:/Schrader Collection/sfc00689 ID. Schrader, F.C. 689 Stick Indian Natives of Copper River, members of Bellums Indian Tribe, Near Kotsina Crossing, looking north. Alaska. 1899. #1:/Alaska-Bulletin 374/sfc00721 ID. Schrader, F.C. 721 Sheared greenstone on south side of Kotsina River, below Surprise creek. Nizina district, Copper River region, Alaska. 1900. Plate 3-B in U.S. Geological Survey. Bulletin 374. 1909. #1:/Alaska-Bulletin 374/sfc00733 ID. Schrader, F.C. 733 Intrusions of fine-grained porphyry in black shale on Young creek. Chitina district, Copper River region, Alaska. 1900. Plate 6-A in U.S. Geological Survey. Bulletin 374. 1909. #1:/Alaska Glaciers/sfc00781 ID. Schrader, F.C. 781 Alaska Glaciers. Front of Miles Glacier, north of Katalla in the Chugach Mountains, viewed from a moraine at the foot of Copper River rapids, looking south 20 degrees east. 1900. #1:/Alaska-Professional paper 20/sfc00864 ID. Schrader, F.C. 864 Skagit limestone on John River in Endicott Mountains, looking southeast. Wiseman district, Yukon region. Alaska. June 1901. Plate 9-B in U.S. Geological Survey. Professional paper 20. 1904. #1:/Alaska-Professional paper 20/sfc00866 ID. Schrader, F.C. 866 Topography of John River valley in Endicott Mountains; from near south edge of Fickett series, looking south 60 degrees east, into Skagit formation Wiseman district, Yukon region. Alaska. April 1901. Plate 6-A in U.S. Geological Survey. Professional paper 20. 1904. #1:/Alaska-Professional paper 20/sfc00879 ID. Schrader, F.C. 879 Timbered terminal moraine resting on Fickett Series on John River, looking southwest. Wiseman district, Yukon region. Alaska. 1901. Plate 15-B in U.S. Geological Survey. Professional paper 20. 1904. #1:/Alasks-Professional paper 45/sfc00883 ID. Schrader, F.C. 883 Ice remnant of John River valley glacier in Endicott Mountains, looking southwest. Alaska. July 4, 1901, plate 24-B in U.S. Geological Survey. Professional paper 45. 1906. Plate 15-A in U.S. Geological Survey. Professional paper 20. 1904. #1:/Alaska-Professional paper 20/sfc00885 ID. Schrader, F.C. 885 Glaciated side slopes of John River valley in Endicott Mountains, looking northeast. Wiseman district, Yukon region. Alaska. June 1901. Plate 6-B in U.S. Geological Survey. Professional paper 20. 1904. #1:/Alaska-Professional paper 20/sfc00889 ID. Schrader, F.C. 889 Quartz gash stringer veining in Fickett Series on John River, in Endicott Mountains, looking southeast. Wiseman district, Yukon region. Alaska. July 9, 1901. Plate 11-A in U.S. Geological Survey. Professional paper 20. 1904. #1:/Alaska-Professional paper 20/sfc00890 ID. Schrader, F.C. 890 Glaciation in upper John River valley in Endicott Mountains, looking southwest. Wiseman district, Yukon region. Alaska. 1901. Plate 14-B in U.S. Geological Survey. Professional paper 20. 1904. #1:/Alaska-Professional paper 20/sfc00894 ID. Schrader, F.C. 894 Bisected view of Endicott plateau and Endicott Mountains carved from it, principally in Fickett Series, looking east. Wiseman district, Yukon region. Alaska. 1901. Plate 7-A, as a panorama, in U.S. Geological Survey. Professional paper 20. 1904. #1:/Alaska-Professional paper 20/sfc00895 ID. Schrader, F.C. 895 Bisected view of Endicott plateau and Endicott Mountains carved from it, principally in Fickett Series, looking east. Wiseman district, Yukon region. Alaska. 1901. Plate 7-A, as a panorama, in U.S. Geological Survey. Professional paper 20. 1904. #1:/Alaska-Professional paper 20/sfc00896 ID. Schrader, F.C. 896 Bisected view of Endicott plateau and Endicott Mountains carved from it, principally in Fickett Series, looking south. Wiseman district, Yukon region. Alaska. 1901. Plate 7-B, as a panorama, in U.S. Geological Survey. Professional paper 20. 1904. #1:/Alaska-Professional paper 20/sfc00898 ID. Schrader, F.C. 898 Bisected view of Endicott plateau and Endicott Mountains carved from it, principally in Fickett Series, looking south. Wiseman district, Yukon region. Alaska. 1901. Plate 7-B, as a panorama, in U.S. Geological Survey. Professional paper 20. 1904. #1:/Alaska-Professional paper 20/sfc00922 ID. Schrader, F.C. 922 Lisburne limestone and Fickett series in Endicott Mountains at head of John River, from an altitude of 6,000 feet; looking west; Fickett series is in left background. Wiseman district, Yukon region. Alaska. 1901. Plate 4-B, as a panorama, in U.S. Geological Survey. Professional paper 20. 1904. #1:/Alaska-Professional paper 20/sfc00923 ID. Schrader, F.C. 923 Lisburne limestone and Fickett series in Endicott Mountains at head of John River, from an altitude of 6,000 feet; looking west; Fickett series is in left background. Wiseman district, Yukon region. Alaska. 1901. Plate 4-B, as a panorama, in U.S. Geological Survey. Professional paper 20. 1904. #1:/Alaska-Professional paper 20/sfc00958 ID. Schrader, F.C. 958 Inland edge of Anaktuvuk plateau and north ridge of Endicott Mountains, from surface of the plateau at 2,200 feet; looking southwest. Anaktuvuk district, Northern Alaska region. Alaska. 1901. Plate 4-A, as a panorama, in U.S. Geological Survey. Professional paper 20. 1904. #1:/Alaska-Professional paper 20/sfc00959 ID. Schrader, F.C. 959 Inland edge of Anaktuvuk plateau and north ridge of Endicott Mountains, from surface of the plateau at 2,200 feet; looking southwest. Anaktuvuk district, Northern Alaska region. Alaska. 1901. Plate 4-A, as a panorama, in U.S. Geological Survey. Professional paper 20. 1904. #1:/Alaska-Professional paper 45/sfc00965 ID. Schrader, F.C. 965 North front of Endicott Mountains, showing relations of Anaktuvuk Plateau and planated surface of plateau, Alaska. 1901, plate 29-B in U.S. Geological Survey. Professional paper 45. 1906. #1:/Alaska-Professional paper 20/sfc00967 ID. Schrader, F.C. 967 Structure in Anaktuvuk Series on Anaktuvuk River, looking north-northwest. Anaktuvuk district, Northern Alaska region. Alaska. August 1901. Plate 11-B in U.S. Geological Survey. Professional paper 20. 1904. #1:/Alaska-Professional paper 20/sfc00981 ID. Schrader, F.C. 981 Structure and rapid alternation in bedding in Nanushuk Series on Anaktuvuk River, looking northeast. Anaktuvuk district, Northern Alaska region. Alaska. August 1901. Plate 12-B in U.S. Geological Survey. Professional paper 20. 1904. #1:/Alaska-Professional paper 20/sfc00996 ID. Schrader, F.C. 996 Bisected view of Colville River bluffs in Tertiary coast plain of Colville Series, looking southwest. Northern Alaska region. Alaska. 1901. Plates 8-A and B, respectively, in U.S. Geological Survey. Professional paper 20. 1904. #1:/Alaska-Professional paper 20/sfc00997 ID. Schrader, F.C. 997 Bisected view of Colville River bluffs in Tertiary coast plain of Colville Series, looking southwest. Northern Alaska region. Alaska. 1901. Plates 8-A and B, respectively, in U.S. Geological Survey. Professional paper 20. 1904. #1:/Alaska-Professional paper 20/sfc00998 ID. Schrader, F.C. 998 Bisected view of Colville River bluffs in Tertiary coast plain of Colville Series, looking southwest. Northern Alaska region. Alaska. 1901. Plates 8-C and D, respectively, in U.S. Geological Survey. Professional paper 20. 1904: photo 998 is plate 34-A in U.S. Geological Survey. Bulletin 815. 1930. #1:/Alaska-Professional paper 20/sfc00999 ID. Schrader, F.C. 999 Bisected view of Colville River bluffs in Tertiary coast plain of Colville Series, looking southwest. Northern Alaska region. Alaska. 1901. Plates 8-C and D, respectively, in U.S. Geological Survey. Professional paper 20. 1904: photo 998 is plate 34-A in U.S. Geological Survey. Bulletin 815. 1930. #1:/Alaska-Professional paper 20/sfc01000 ID. Schrader, F.C. 1000 Structure in Colville Series (Tertiary), looking southwest. Anaktuvuk district, Northern Alaska region. Alaska. August 1901. Portion of this photo is plate 13-A in U.S. Geological Survey. Professional paper 20. 1904. #1:/Alaska-Professional paper 20/sfc01001 ID. Schrader, F.C. 1001 Structure in Colville Series (Tertiary), looking west-southwest. Anaktuvuk district, Northern Alaska region. Alaska. August 1901. Portion of this photo is plate 13-B in U.S. Geological Survey. Professional paper 20. 1904. #1:/Alaska-Professional paper 20/sfc01005 ID. Schrader, F.C. 1005 Pliocene fossil locality in Colville River bluff (Colville Series), Tertiary coastal plain. Latitude 70 degrees, 1 minute; looking northwest. Native Eskimo family in foreground. Anaktuvuk district, Northern Alaska region. Alaska. 1901. Plate 14-A in U.S. Geological Survey. Professional paper 20. 1904. #1:/Alaska-Professional paper 20/sfc01015 ID. Schrader, F.C. 1015 Abandoned Pleistocene flats of Colville River showing mounds and lakelets, from 30 miles inland; looking north northeast. Anaktuvuk district, Northern Alaska region. Alaska. 1901. Plate 16-B in U.S. Geological Survey. Professional paper 20. 1904. #1:/Alaska-Professional paper 20/sfc01027 ID. Schrader, F.C. 1027 Artic Coast and edge of moss-covered Artic Coast plain from west of Colville River, looking southeast. Anaktuvuk district, Northern Alaska region. Alaska. 1901. Plate 9-A in U.S. Geological Survey. Professional paper 20. 1904, plate 14-A in U.S. Geological Survey. Professional paper 60. 1908. #1:/Alaska-Professional paper 20/sfc01035 ID. Schrader, F.C. 1035 Barrier reef and Eskimo grave on Artic coast near Icy Cape, looking southwest. Wainwright district, Northern Alaska region. Alaska. September 15. 1901. Plate 16-A in U.S. Geological Survey. Professional paper 20. 1904. #1:/Alaska-Professional paper 20/sfc01047 ID. Schrader, F.C. 1047 Coal bed and rocks of Corwin Series at Corwin Mines, near Cape Lisburne, looking southwest. Lisburne district, Northern Alaska region. Alaska. 1901. Plate 13-C in U.S. Geological Survey. Professional paper 20. 1904, plate 30 in U.S. Geological Survey. Bulletin 815. 1930. #1:/Alaska-Professional paper 15/sfc01105 ID. Schrader, F.C. 1105 Monte Cristo diorite on Monte Cristo Creek, looking northeast. Wrangell district, Copper River region, Alaska. Circa 1900. Plate 8-A in U.S. Geological Survey Professional paper 15. 1903. #1:/Alaska Glacier/sfc01107 ID. Schrader, F.C. 1107 Up and across Nabesna Glacier from east of Nt, Gordon, at 8000 feet, looking south 70 degrees east. Wrangell district, Copper River region, Alaska. Circa 1900. #1:/Alaska Glacier/sfc01108 ID. Schrader, F.C. 1108 View across foot of Nabesna Glacier from east of Mt. Gordon, at 8000 feet, looking north 70 degrees east. Wrangell district, Copper River region, Alaska. Circa 1900. #1:/Alaska Glacier/sfc01109 ID. Schrader, F.C. 1109 Down and across Nabesna Glacier and gap. From east of Mt. Gordon, at 8000 feet, looking north 70 degrees east. Wrangell district, Copper River region, Alaska. Circa 1900. #1:/Alaska Glacier/sfc01110 ID. Schrader, F.C. 1110 Head of Nabesna Glacier and mountains. From east of Mt. Gordon, at 8000 feet, looking south 30 degrees east. Wrangell district, Copper River region, Alaska. Circa 1900. #1:/Alaska-Professional paper 15/sfc01111 ID. Schrader, F.C. 1111 Monte Cristo diorite intruded by diabase; looking northeast down Monte Cristo Creek. Wrangell district, Copper River region, Alaska. Circa 1900. Plate 7-A in U.S. Geological Survey Professional paper 15. 1903. #1:/Alaska-Professional paper 15/sfc01118 ID. Schrader, F.C. 1118 Venation and disintegration in Monte Cristo diorite; view from California Gulch, looking north down Nabesna Valley. Wrangell district, Copper River region, Alaska. Circa 1900. Plate 8-B in U.S. Geological Survey Professional paper 15. 1903. #1:/Alaska-Bulletin 417/sfc01124 ID. Schrader, F.C. 1124 Mountains between Jack and Jacksina creeks. Chisana district, Yukon region, Alaska. 1902. Plate 4-B in U.S. Geological Survey. Bulletin 417. 1910. #1:/Alaska/sfc01140 ID. Schrader, F.C. 1140 Chusana [Indian] Natives at Quartz Creek Camp. Looking west. Alaska. August 16. cc 1902. #1:/Alaska/sfc01141 ID. Schrader, F.C. 1141 Structure in mountain at head of Chusana Canyon on east side from gulch 63 degrees on west side. Looking south 45 degrees east. Alaska. cc 1902. #1:/Alaska-Professional paper 15/sfc01158 ID. Schrader, F.C. 1158 Nabesna limestone intruded by diabasic series on Nabesna River; looking east. Wrangell district, Copper River region, Alaska. Circa 1900. Plate 7-B in U.S. Geological Survey Professional paper 15. 1903. #1:/New Mexico-Professional paper 68/sfc01243 ID. Schrader, F.C. 1243 South edge of Mesa Blanca, Capulin, elevation 8,000 feet, showing sedimentary rocks extending from the Dakota (?) sandstone down to the copper bearing Triassic, below white band of limestone and gypsum. Looking north from Agua Sarca road, eastern part of Galina Valley. Sandoval County, New Mexico. 1905. Plate 6-B in U.S. Geological Survey. Professional paper 68. 1910. #1:/New Mexico-Professional paper 68/sfc01353 ID. Schrader, F.C. 1353 Portion of Las Tusas Mesa, showing 1,000 feet of Triassic and Carboniferous "Red Beds"; some of which are copper bearing, looking north from Copper Hill district. Valencia County, New Mexico. 1905. Plate 6-C in U.S. Geological Survey. Professional paper 68. 1910. #1:/New Mexico-Professional paper 68/sfc01397 ID. Schrader, F.C. 1397 View from San Miguel mine, of upturned beds of Mesozoic age along western base of Nacimiento portion of the Colorado Plateau of flat lying Cretaceous and Tertiary in left background. The white rocks are beds of gypsum and limestone; elevation 7,700 feet, looking northeast. Sandoval County, New Mexico. 1905. Plate 6-A in U.S. Geological Survey. Professional paper 68. 1910. #1:/New Mexico-Bulletin 716/sfc01410 ID. Schrader, F.C. 1410 Coal bed at location 140, on San Juan River half a mile southwest of Fruitland, San Juan County, New Mexico. 1905. Plate 20-B in U.S. Geological Survey. Bulletin 716. 1920. #1:/Arizona-Bulletin 397/sfc01421 ID. Schrader, F.C. 1421 Banner Group mine and mill, looking north. Mohave County, Arizona. 1906. Plate 7-B in U.S. Geological Survey. Bulletin 397. 1909. #1:/Arizona-Bulletin 397/sfc01459 ID. Schrader, F.C. 1459 Golden Star mine and fault block, looking south. Mohave County, Arizona. 1906. Plate 12-A in U.S. Geological Survey. Bulletin 397. 1909. #1:/Arizona-Bulletin 397/sfc01462 ID. Schrader, F.C. 1462 Gold Road vein at east of Line Road claim, looking northwest. Mohave County, Arizona. 1906. Plate 12-B in U.S. Geological Survey. Bulletin 397. 1909. #1:/Arizona-Bulletin 397/sfc01466 ID. Schrader, F.C. 1466 Ark mine and mill and Turquoise Mountain looking northeast. Mohave County, Arizona. 1906. Plate 7-A in U.S. Geological Survey. Bulletin 397. 1909. #1:/Arizona-Bulletin 397/sfc01473 ID. Schrader, F.C. 1473 Midnight mine, looking northeast. Mohave County, Arizona. 1906. Plate 6-B in U.S. Geological Survey. Bulletin 397. 1909. #1:/Arizona-Bulletin 397/sfc01475 ID. Schrader, F.C. 1475 Part of lava mesa surrounding Kingman, looking northwest from west side of town. Mohave County, Arizona. 1906. Plate 4-A in U.S. Geological Survey. Bulletin 397. 1909. #1:/Arizona-Bulletin 397/sfc01477 ID. Schrader, F.C. 1477 Pinkham mine and slope of Sacramento Valley, looking south-southwest. Mohave County, Arizona. 1906. Plate 6-A in U.S. Geological Survey. Bulletin 397. 1909. #1:/Arizona-Bulletin 397/sfc01478 ID. Schrader, F.C. 1478 Tennessee mine and mill, looking southeast. Mohave County, Arizona. 1906. Plate 5-B in U.S. Geological Survey. Bulletin 397. 1909. #1:/Arizona-Bulletin 397/sfc01479 ID. Schrader, F.C. 1479 Elkhart mine and mill, looking northwest. Mohave County, Arizona. 1906. Plate 5-A in U.S. Geological Survey. Bulletin 397. 1909. #1:/Arizona-Bulletin 397/sfc01480 ID. Schrader, F.C. 1480 Chloride and part of Cerbat Range, looking east from Silver Hill. Mohave County, Arizona. 1906. Plate 4-B in U.S. Geological Survey. Bulletin 397. 1909. #1:/Arizona-Bulletin 397/sfc01485 ID. Schrader, F.C. 1485 Gold Road Gulch, looking southeast from United States mineral monument, vein croppings in shade to right. Mohave County, Arizona. 1906. Plate 11-B in U.S. Geological Survey. Bulletin 397. 1909. #1:/Arizona-Bulletin 397/sfc01488 ID. Schrader, F.C. 1488 Gold Road mine, looking south, silicified lode croppings on both sides. Mohave County, Arizona. 1906. Plate 11-A in U.S. Geological Survey. Bulletin 397. 1909. #1:/Arizona-Bulletin 397/sfc01493 ID. Schrader, F.C. 1493 Tom Reed (formerly Blue Ridge) mine and mill, looking northeast: dark volcanic rocks of range in background, intruded by light-colored rhyolite. Mohave County, Arizona. 1906. Plate 13-A in U.S. Geological Survey. Bulletin 397. 1909. #1:/Arizona-Bulletin 397/sfc01494 ID. Schrader, F.C. 1494 Tom Reed (formerly Blue Ridge) mine and mill, looking northeast: dark volcanic rocks of range in background, intruded by light-colored rhyolite. Mohave County, Arizona. 1906. Plate 13-A in U.S. Geological Survey. Bulletin 397. 1909. #1:/Arizona-Bulletin 397/sfc01496 ID. Schrader, F.C. 1496 Victor-Virgin mine, looking north: Victor shaft to the left; Virgin to the right. Mohave County, Arizona. 1906. Plate 15-A in U.S. Geological Survey. Bulletin 397. 1909. #1:/Arizona-Bulletin 397/sfc01499 ID. Schrader, F.C. 1499 German-American mine, looking south: Treadwell shaft to the right, Thirty-fifth Parallel shaft left of center, Boundary Cone shows through gap. Mohave County, Arizona. 1906. Plate 15-B in U.S. Geological Survey. Bulletin 397. 1909. #1:/Arizona-Bulletin 397/sfc01509 ID. Schrader, F.C. 1509 Foothills of green chloritic andesite looking east from Leland mine, mines of Vivian district in foreground, main range in background. Mohave County, Arizona. 1906. Plate 13-B in U.S. Geological Survey. Bulletin 397. 1909. #1:/Arizona-Bulletin 397/sfc01510 ID. Schrader, F.C. 1510 Foothills of green chloritic andesite looking east from Leland mine, mines of Vivian district in foreground, main range in background. Mohave County, Arizona. 1906. Plate 13-B in U.S. Geological Survey. Bulletin 397. 1909. #1:/Arizona-Bulletin 397/sfc01512 ID. Schrader, F.C. 1512 Leland mine, east side. Looking west. Mohave County, Arizona. 1906. Plate 14-A in U.S. Geological Survey. Bulletin 397. 1909. #1:/Arizona-Bulletin 397/sfc01520 ID. Schrader, F.C. 1520 Topography of andesite flows in southern part of Boundary Cone district, looking southeast from Boundary Cone. Mohave County, Arizona. 1906. Plate 16-B in U.S. Geological Survey. Bulletin 397. 1909. #1:/Arizona-Bulletin 397/sfc01521 ID. Schrader, F.C. 1521 Topography of andesite in northeastern part of Boundary Cone district, looking north from a point near Highland Chief mine; Krauss camp and mine in foreground. Mohave County, Arizona. 1906. Plate 16-A in U.S. Geological Survey. Bulletin 397. 1909. #1:/Arizona-Bulletin 397/sfc01524 ID. Schrader, F.C. 1524 Contact of chloritic andesite with lighter-colored, older underlying andesite, ridge southwest of Vivian mine, Leland mine, and butte to the right, looking northwest. Mohave County, Arizona. 1906. Plate 14-B in U.S. Geological Survey. Bulletin 397. 1909. #1:/Arizona-Bulletin 582/sfc01529 ID. Schrader, F.C. 1529 Total Wreck mine and mill, looking west. Pima County, Arizona. 1909. Plate 14-B in U.S. Geological Survey. Bulletin 582. 1915. #1:/Arizona-Bulletin 582/sfc01530 ID. Schrader, F.C. 1530 Total Wreck mine and mill, looking west. Pima County, Arizona. 1909. Plate 14-B in U.S. Geological Survey. Bulletin 582. 1915. #1:/Arizona-Bulletin 582/sfc01531 ID. Schrader, F.C. 1531 Total Wreck mine and mill, looking west. Pima County, Arizona. 1909. Plate 14-B in U.S. Geological Survey. Bulletin 582. 1915. #1:/Arizona-Bulletin 582/sfc01534 ID. Schrader, F.C. 1534 Mount Fagan and slopes, showing erosion topography in ridges and gulches in Mesozoic rocks mostly shale. Looking north-northeast from head of Sycamore Canyon. Pima County, Arizona. 1909. Plate 5-A in U.S. Geological Survey. Bulletin 582. 1915. #1:/Arizona-Bulletin 582/sfc01539 ID. Schrader, F.C. 1539 Quaternary gravels (indurated conglomerate), at west base of Red Mountain on Gar Canyon, an eastern tributary of Alum Canyon, near Patagonia, looking east-northeast. Santa Cruz County, Arizona. 1909. Plate 5-B in U.S. Geological Survey. Bulletin 582. 1915. #1:/Arizona-Bulletin 582/sfc01542 ID. Schrader, F.C. 1542 Croppings of copper deposits of Three R mine on mineralized shear zone in granite porphyry. Looking south-southwest. Santa Cruz County, Arizona. 1909. Plate 19-B in U.S. Geological Survey. Bulletin 582. 1915. #1:/Arizona-Bulletin 582/sfc01548 ID. Schrader, F.C. 1548 Bonanza mine, looking southwest. Santa Cruz County, Arizona. 1909. Plate 25 in U.S. Geological Survey. Bulletin 582. 1915. #1:/Arizona-Bulletin 582/sfc01550 ID. Schrader, F.C. 1550 Copper World mine, looking north-northwest from Isle Royal ground. Pima County, Arizona. 1909. Plate 12-A in U.S. Geological Survey. Bulletin 582. 1915. #1:/Arizona-Bulletin 582/sfc01551 ID. Schrader, F.C. 1551 Isle Royal mine, Monument Mountain (limestone) at right, Hart Butte (quartzite) in right background, granite porphyry in left middle ground and Lopez Pass in left background. Looking southeast from above Leader mine. Pima County, Arizona. 1909. Plate 12-B in U.S. Geological Survey. Bulletin 582. 1915. #1:/Arizona-Bulletin 582/sfc01552 ID. Schrader, F.C. 1552 Old Dick mine, Mohawk mine, and Quartzite butte (Hard Butte) in crest of Santa Rita range. Looking southeast from aplite ridge at an elevation of 4, 400 feet. Pima County, Arizona. 1909. Plate 4-B in U.S. Geological Survey. Bulletin 582. 1915. #1:/Arizona-Bulletin 582/sfc01553 ID. Schrader, F.C. 1553 Heavy Weight mine, fault scarp at left, looking northeasterly. Pima County, Arizona. 1909. Plate 14-A in U.S. Geological Survey. Bulletin 582. 1915. #1:/Arizona-Bulletin 582/sfc01556 ID. Schrader, F.C. 1556 Northwest base of Santa Rita Mountains in Old Baldy district, showing mostly volcanic rock topography. Looking southeast from southern part of United States Range Reserve, near roads forks and Sawmill Canyon, at an elevation of 3,500 feet. Pima County, Arizona. 1909. Plate 4-A in U.S. Geological Survey. Bulletin 582. 1915. #1:/Arizona-Bulletin 582/sfc01561 ID. Schrader, F.C. 1561 Helvetia Camp, basin and mines. Crest of Santa Rita Mountains in background. Looking east from ridge of Tiptop Mountain, at an elevation of 4,300 feet. From left starting at second peak in upper left, thru the center of the following mine locations are identified: Heavy Weight, Copper World, Mohawk, Leader, Isle Royal, Old Dick, and Omega. Pima County, Arizona. 1909. Plate 10 in U.S. Geological Survey. Bulletin 582. 1915. #1:/Arizona-Bulletin 582/sfc01562 ID. Schrader, F.C. 1562 Helvetia Camp, basin and mines. Crest of Santa Rita Mountains in background. Looking east from ridge of Tiptop Mountain, at an elevation of 4,300 feet. From left starting at second peak in upper left, thru the center of the following mine locations are identified: Heavy Weight, Copper World, Mohawk, Leader, Isle Royal, Old Dick, and Omega. Pima County, Arizona. 1909. Plate 10 in U.S. Geological Survey. Bulletin 582. 1915. #1:/Arizona-Bulletin 582/sfc01563 ID. Schrader, F.C. 1563 Helvetia Camp, basin and mines. Crest of Santa Rita Mountains in background. Looking east from ridge of Tiptop Mountain, at an elevation of 4,300 feet. From left starting at second peak in upper left, thru the center of the following mine locations are identified: Heavy Weight, Copper World, Mohawk, Leader, Isle Royal, Old Dick, and Omega. Pima County, Arizona. 1909. Plate 10 in U.S. Geological Survey. Bulletin 582. 1915. #1:/Arizona-Bulletin 582/sfc01566 ID. Schrader, F.C. 1566 Quaternary deposits on Sonoita Creek, shows mostly eroded topography. Patagonia in foreground, Santa Rita Mountains in background, and Old Baldy at right. Santa Cruz County, Arizona. 1909. Plate 6-A in U.S. Geological Survey. Bulletin 582. 1915. #1:/Arizona-Bulletin 582/sfc01571 ID. Schrader, F.C. 1571 Sweet mine and smelter plant of Mansfield group. Vein outcroppings in right and left foreground, looking southwesterly. Santa Cruz County, Arizona. 1909. Plate 16-A in U.S. Geological Survey. Bulletin 582. 1915. #1:/Arizona-Bulletin 582/sfc01574 ID. Schrader, F.C. 1574 Flow (?) structure bedding in quartz diorite at Salero, gulch northwest of plaza. Croppings of vein and west shaft of Salero mine at right, looking northwest. Santa Cruz County, Arizona. 1909. Plate 7-A in U.S. Geological Survey. Bulletin 582. 1915. #1:/Arizona-Bulletin 582/sfc01575 ID. Schrader, F.C. 1575 Salero or Darwin mine and quartz diorite property, just north of Salero, at an elevation of 4,150 feet. Looking northwest. Santa Cruz County, Arizona. 1909. Plate 7-B in U.S. Geological Survey. Bulletin 582. 1915. #1:/Arizona-Bulletin 582/sfc01578 ID. Schrader, F.C. 1578 Alto mine, camp and mill, mostly in SE ¬ , Sec. 12, looking northeast, tunnel is at outcrop below the summit Santa Cruz County, Arizona. 1909. Plate 15 in U.S. Geological Survey. Bulletin 582. 1915. #1:/Arizona-Bulletin 582/sfc01580 ID. Schrader, F.C. 1580 Castle Butte mine, Sonoita valley, Red Mountain at right. Looking southeasterly. Pima County, Arizona. 1909. Plate 16-B in U.S. Geological Survey. Bulletin 582. 1915. #1:/Arizona-Bulletin 582/sfc01581 ID. Schrader, F.C. 1581 World's Fair mine, mill at lower right. Looking southwesterly. Santa Cruz County, Arizona. 1909. Plate 17-A in U.S. Geological Survey. Bulletin 582. 1915. #1:/Arizona-Bulletin 582/sfc01584 ID. Schrader, F.C. 1584 Croppings of copper deposits of Four Metals mine. In mineralized shear zone in quartz monzonite. Looking northeast. Santa Cruz County, Arizona. 1909. Plate 23 in U.S. Geological Survey. Bulletin 582. 1915. #1:/Arizona-Bulletin 582/sfc01585 ID. Schrader, F.C. 1585 Mowry mine and part of camp, mill at right, smelter at left. Looking north-northeast. Santa Cruz County, Arizona. 1909. Plate 22 in U.S. Geological Survey. Bulletin 582. 1915. #1:/Arizona-Bulletin 582/sfc01586 ID. Schrader, F.C. 1586 Camp Washington and Duquesne reduction plant on Washington Gulch, Pride of the West mine at left and Patagonia Mountains in background. Looking west. Santa Cruz County, Arizona. 1909. Plate 20 in U.S. Geological Survey. Bulletin 582. 1915. #1:/Arizona-Bulletin 582/sfc01587 ID. Schrader, F.C. 1587 Camp Washington and Duquesne reduction plant on Washington Gulch, Pride of the West mine at left and Patagonia Mountains in background. Looking west. Santa Cruz County, Arizona. 1909. Plate 20 in U.S. Geological Survey. Bulletin 582. 1915. #1:/Nevada-Bulletin 497/sfc01591 ID. Schrader, F.C. 1591 Jarbidge Mountains, looking southeast. Panorama extending from the piedmont rim rock plain, looking north-northeast beyond Jack Creek, south through the Crater Range to the Great Basin divide, thence west and northwest through the Copper Mountain along the western edge of the district. Taken from the base line station 1 on Deer Creek Ridge, 1.5 miles northwest of Jarbidge, at an elevation of 7,500 feet. Elko County, Nevada. 1910. Plate 3-A in U.S. Geological Survey. Bulletin 497. 1912. #1:/Nevada-Bulletin 497/sfc01592 ID. Schrader, F.C. 1592 Jarbidge Mountains, looking southeast. Panorama extending from the piedmont rim rock plain, looking north-northeast beyond Jack Creek, south through the Crater Range to the Great Basin divide, thence west and northwest through the Copper Mountain along the western edge of the district. Taken from the base line station 1 on Deer Creek Ridge, 1.5 miles northwest of Jarbidge, at an elevation of 7,500 feet. Elko County, Nevada. 1910. Plate 3-A in U.S. Geological Survey. Bulletin 497. 1912. #1:/Nevada-Bulletin 497/sfc01593 ID. Schrader, F.C. 1593 Jarbidge Mountains, looking southeast. Panorama extending from the piedmont rim rock plain, looking north-northeast beyond Jack Creek, south through the Crater Range to the Great Basin divide, thence west and northwest through the Copper Mountain along the western edge of the district. Taken from the base line station 1 on Deer Creek Ridge, 1.5 miles northwest of Jarbidge, at an elevation of 7,500 feet. Elko County, Nevada. 1910. Plate 3-A in U.S. Geological Survey. Bulletin 497. 1912. #1:/Nevada-Bulletin 497/sfc01594 ID. Schrader, F.C. 1594 Jarbidge Mountains, looking southeast. Panorama extending from the piedmont rim rock plain, looking north-northeast beyond Jack Creek, south through the Crater Range to the Great Basin divide, thence west and northwest through the Copper Mountain along the western edge of the district. Taken from the base line station 1 on Deer Creek Ridge, 1.5 miles northwest of Jarbidge, at an elevation of 7,500 feet. Elko County, Nevada. 1910. Plate 3-A in U.S. Geological Survey. Bulletin 497. 1912. #1:/Nevada-Bulletin 497/sfc01595 ID. Schrader, F.C. 1595 Jarbidge Mountains, looking southeast. Panorama extending from the piedmont rim rock plain, looking north-northeast beyond Jack Creek, south through the Crater Range to the Great Basin divide, thence west and northwest through the Copper Mountain along the western edge of the district. Taken from the base line station 1 on Deer Creek Ridge, 1.5 miles northwest of Jarbidge, at an elevation of 7,500 feet. Elko County, Nevada. 1910. Plate 3-A in U.S. Geological Survey. Bulletin 497. 1912. #1:/Nevada-Bulletin 497/sfc01596 ID. Schrader, F.C. 1596 Jarbidge Mountains, looking southeast. Panorama extending from the piedmont rim rock plain, looking north-northeast beyond Jack Creek, south through the Crater Range to the Great Basin divide, thence west and northwest through the Copper Mountain along the western edge of the district. Taken from the base line station 1 on Deer Creek Ridge, 1.5 miles northwest of Jarbidge, at an elevation of 7,500 feet. Elko County, Nevada. 1910. Plate 3-A in U.S. Geological Survey. Bulletin 497. 1912. #1:/Nevada-Bulletin 497/sfc01597 ID. Schrader, F.C. 1597 Jarbidge Mountains, looking southeast. Panorama extending from the piedmont rim rock plain, looking north-northeast beyond Jack Creek, south through the Crater Range to the Great Basin divide, thence west and northwest through the Copper Mountain along the western edge of the district. Taken from the base line station 1 on Deer Creek Ridge, 1.5 miles northwest of Jarbidge, at an elevation of 7,500 feet. Elko County, Nevada. 1910. Plate 3-A in U.S. Geological Survey. Bulletin 497. 1912. #1:/Nevada-Bulletin 497/sfc01600 ID. Schrader, F.C. 1600 Jarbidge, Jarbidge River valley, and mountains in old rhyolite, looking south 10 degrees west. Elko County, Nevada. 1910. Plate 3-A in U.S. Geological Survey. Bulletin 497. 1912. #1:/Nevada-Bulletin 497/sfc01602 ID. Schrader, F.C. 1602 Pick and Shovel mine and outcrop of Pick and Shovel vein, from the west (normal) slope of the Crater Range, at elevation of 7,400 feet looking N. 8 degrees W. Elko County, Nevada. 1910. Plate 7-B in U.S. Geological Survey. Bulletin 497. 1912. #1:/Nevada-Bulletin 497/sfc01603 ID. Schrader, F.C. 1603 Buster vein outcrop, shown as bold, dark, dike like wall ascending slope of mineralized belt, from Park lease, at elevation of 6,400 feet looking N. 30 degrees E. across Jarbidge Valley. Elko County, Nevada. 1910. Plate 7-A in U.S. Geological Survey. Bulletin 497. 1912. #1:/Nevada-Bulletin 497/sfc01604 ID. Schrader, F.C. 1604 South Branch valley at head of Jarbidge River, Great Basin divide in background, Ozark lode, and Foster camp on East Branch in foreground. View looking south from Ozark claim, at elevation of 7,700 feet. Elko County, Nevada. 1910. Plate 3-B in U.S. Geological Survey. Bulletin 497. 1912. #1:/Nevada-Bulletin 497/sfc01605 ID. Schrader, F.C. 1605 Old rhyolites near head of Jarbidge River, composed of heavy, ill-defined flows or beds dipping gently southwest, from Ozark mine trail, at elevation of 7,700 feet looking west across the river. Elko County, Nevada. 1910. Plate 6-B in U.S. Geological Survey. Bulletin 497. 1912. #1:/Nevada-Bulletin 497/sfc01606 ID. Schrader, F.C. 1606 Pine Creek valley in old rhyolite, from Pick and Shovel trail on opposite slope, at elevation of 7,000 feet, looking southeast. Elko County, Nevada. 1910. Plate 6-A in U.S. Geological Survey. Bulletin 497. 1912. #1:/Nevada-Bulletin 497/sfc01607 ID. Schrader, F.C. 1607 Part of rim of first crater, from Little Jack saddle, at elevation 0f 9,200 feet, looking S. 30 degrees W. Elko County, Nevada. 1910. Plate 5-A in U.S. Geological Survey. Bulletin 497. 1912. #1:/Nevada-Bulletin 497/sfc01608 ID. Schrader, F.C. 1608 Van Alder and Howard McCoy mines, in second crater, floor of coarse glacial, snowslide, and avalanche debris in foreground flanked by belt of steep talus 200 feet high skirting foot of mural cliff, from floor of "crater," at elevation of 9,500 feet, looking S. 16 degrees E. Elko County, Nevada. 1910. Plate 5-B in U.S. Geological Survey. Bulletin 497. 1912. #1:/Nevada-Bulletin 497/sfc01611 ID. Schrader, F.C. 1611 View of Elk Mountains, chiefly Paleozoic sedimentary rocks, left half is looking along crest of range, which extends 7 miles north-northeast to the Idaho State line. Elko County, Nevada. 1910. Plate 26 in U.S. Geological Survey. Bulletin 497. 1912. #1:/Nevada-Bulletin 497/sfc01612 ID. Schrader, F.C. 1612 View of Elk Mountains, chiefly Paleozoic sedimentary rocks, left half is looking along crest of range, which extends 7 miles north-northeast to the Idaho State line. Elko County, Nevada. 1910. Plate 26 in U.S. Geological Survey. Bulletin 497. 1912. #1:/Nevada-Bulletin 497/sfc01613 ID. Schrader, F.C. 1613 East prong of Elk Mountain mineral-bearing horseshoe, looking southeast. Elko County, Nevada. 1910. Plate 25-A in U.S. Geological Survey. Bulletin 497. 1912. #1:/Nevada-Bulletin 497/sfc01614 ID. Schrader, F.C. 1614 View of old Contact, in Town Gulch, with sheeted granodiorite butte on right and Delano openings in hill of Paleozoic sedimentary rocks on left. Looking N. 75 degrees E. Elko County, Nevada. 1910. Plate 18-A in U.S. Geological Survey. Bulletin 497. 1912. #1:/Nevada-Bulletin 497/sfc01615 ID. Schrader, F.C. 1615 Brooklyn mine, looking N. 65 degrees E. Elko County, Nevada. 1910. Plate 23-B in U.S. Geological Survey. Bulletin 497. 1912. #1:/Nevada-Bulletin 497/sfc01617 ID. Schrader, F.C. 1617 Bonanza mine and camp in Bonanza Gulch, looking N. 20 degrees, E. Elko County, Nevada. 1910. Plate 24-B in U.S. Geological Survey. Bulletin 497. 1912. #1:/Nevada-Bulletin 497/sfc01618 ID. Schrader, F.C. 1618 Characteristic sedentary boulders produced by weathering of the granodiorite in the Contact district, looking southeast on Thompson Gulch and Bonanza road above White's camp. Elko County, Nevada. 1910. Plate 18-B in U.S. Geological Survey. Bulletin 497. 1912. #1:/Nevada-Bulletin 497/sfc01620 ID. Schrader, F.C. 1620 View showing topography of granodiorite bouldery surface area (in foreground) and Ellen D. Mountain , 8,500 feet in elevation (in background), from point northwest of Ivy Wilson camp, looking N. 10 degrees W. up Thompson Gulch. The mountain is composed chiefly of Paleozoic sedimentary rocks. Elko County, Nevada. 1910. Plate 15-B in U.S. Geological Survey. Bulletin 497. 1912. #1:/Nevada-Bulletin 497/sfc01621 ID. Schrader, F.C. 1621 Palo Alto mine and Middle Stack Mountain. The mine is in the left foreground with basal quartzite croppings extending to right of center. Middle Stack Mountain, 7,900 feet in elevation is in the far center beyond Salmon River valley, with its whitish limestone contact between intrabasin grandiorite area on the right and Paleozoic sedimentary rocks, forming main and higher mass of mountains on left. View from Delano Hill. Elko County, Nevada. 1910. Plate 15-A in U.S. Geological Survey. Bulletin 497. 1912. #1:/Nevada-Bulletin 497/sfc01622 ID. Schrader, F.C. 1622 Lake beds of tuffaceous sandstone (Humboldt formation, Pliocene), Knoll Creek area, looking north-northeast, nearly up the valley; H.D. Range, chiefly Paleozoic sedimentary rocks, in right background. Elko County, Nevada. 1910. Plate 16-B in U.S. Geological Survey. Bulletin 497. 1912. #1:/Nevada-Bulletin 497/sfc01623 ID. Schrader, F.C. 1623 Topography in eroded Paleozoic sedimentary rock belt, chiefly limestone; in China Mountain area on the War Eagle mine, looking N. 55 degrees W. Elko County, Nevada. 1910. Plate 16-A in U.S. Geological Survey. Bulletin 497. 1912 #1:/Nevada-Bulletin 741/sfc01692 ID. Schrader, F.C. 1692 Legitmate Mine, looking northwest across Bourne Gulch, part of Starlight mine at left. The timber on the slopes is mostly mountain mahogany. Elko County, Nevada. 1920. Plate 18 in U.S. Geological Survey. Bulletin 741. 1923. #1:/Nevada-Bulletin 497/sfc01701 ID. Schrader, F.C. 1701 Photomicrograph of pseudomorphic quartz and adularia after calcite; from Pick and Shovel mine, 100-foot level. Example of cellular, drusy, radial, and bladed structures characteristic of the Jarbidge veins. Magnified 25 diameters. Elko County, Nevada. 1910. Plate 9 in U.S. Geological Survey. Bulletin 497. 1912. #1:/Nevada-Bulletin 741/sfc01702 ID. Schrader, F.C. 1702 Pinnacles and jointing in older rhyolite, showing pinnacles carved and characteristic pseudo columnar vertical jointing exposed by erosion and weathering on Jarbidge River below Jarbidge, near mouth of Moore Gulch. Compare with Schrader 1702a; photo by E.C. Weyle. Elko County, Nevada. 1920. Plate 7 in U.S. Geological Survey. Bulletin 741. 1923. #1:/Nevada-Bulletin 741/sfc1702a ID. Schrader, F.C. 1702a Jointing and weathering in young rhyolite, shows characteristic vertical jointing and castellated badland forms of polygonal cross section produced by weathering. View on Jarbidge River near mouth of Deer Creek and Idaho state line looking north; compare with Schrader 1702. Photo by E.C. Weyle. Elko County, Nevada. 1920. Plate 9-B in U.S. Geological Survey. Bulletin 741. 1923. #1:/Nevada-Bulletin 741/sfc1702b ID. Schrader, F.C. 1702b Crater Range, east slope looking west from a point east of East Fork, 4 miles distant, taken October; The name Third Crater, at left of Sugarloaf, should be Fifth Crater; following features are identified (left to right); Sixth Crater at extreme left, Knight-Blakely (both sides of ) Cougar Mountain, Third (Fifth) Crater Sugarloaf, Pinnacle Peak (back of ridge), Black Peak, Baty prospect (top of ) Fourth Crater, Roundup Peak, Third Crater, Morningstar mine (on ridge), Bald Peak, Second Crater (back of ridge) Jarbridge Peak 11,000 ft. Photographs by Claude C. Gillham. Elko County, Nevada. October 1920. Plate 5-A in U.S. Geological Survey. Bulletin 741. 1923. #1:/Nevada-Bulletin 741/sfc1702c ID. Schrader, F.C. 1702c Crater Range, east slope looking west from a point east of East Fork, 4 miles distant, taken October; The name Third Crater, at left of Sugarloaf, should be Fifth Crater; following features are identified (left to right); Sixth Crater at extreme left, Knight-Blakely (both sides of ) Cougar Mountain, Third (Fifth) Crater Sugarloaf, Pinnacle Peak (back of ridge), Black Peak, Baty prospect (top of ) Fourth Crater, Roundup Peak, Third Crater, Morningstar mine (on ridge), Bald Peak, Second Crater (back of ridge) Jarbridge Peak 11,000 ft. Photographs by Claude C. Gillham. Elko County, Nevada. October 1920. Plate 5-A in U.S. Geological Survey. Bulletin 741. 1923 #1:/Nevada-Bulletin 741/sfc1702d ID. Schrader, F.C. 1702d Crater Range, east slope looking west from a point east of East Fork, 4 miles distant, taken October; The name Third Crater, at left of Sugarloaf, should be Fifth Crater; following features are identified (left to right); Sixth Crater at extreme left, Knight-Blakely (both sides of ) Cougar Mountain, Third (Fifth) Crater Sugarloaf, Pinnacle Peak (back of ridge), Black Peak, Baty prospect (top of ) Fourth Crater, Roundup Peak, Third Crater, Morningstar mine (on ridge), Bald Peak, Second Crater (back of ridge) Jarbridge Peak 11,000 ft. Photographs by Claude C. Gillham. Elko County, Nevada. October 1920. Plate 5-A in U.S. Geological Survey. Bulletin 741. 1923. #1:/Nevada-Bulletin 741/sfc1702g ID. Schrader, F.C. 1702g Crest of Crater Range, middle part, looking south from Jarbidge Peak, rugged topography is old rhyolite at of Jarbidge River in right background; heavy flow bedding in old rhyolite near head of East Fork in left background. Dark lava caps old rhyolite in Black Peak. Features identified left right are; south slope of Jarbidge Peak East Fork near head, Black Peak (center), Mary's River Peak, head of Jarbidge River. Photo by Claude C. Gillham. Elko County, Nevada. August 31, 1920. Plate 6-B in U.S. Geological Survey. Bulletin 741. 1923. #1:/Nevada-Bulletin 741/sfc1702h ID. Schrader, F.C. 1702h Crest of Crater Range, middle part, looking south from Jarbidge Peak, rugged topography is old rhyolite at of Jarbidge River in right background; heavy flow bedding in old rhyolite near head of East Fork in left background. Dark lava caps old rhyolite in Black Peak. Features identified left right are; south slope of Jarbidge Peak East Fork near head, Black Peak (center), Mary's River Peak, head of Jarbidge River. Photo by Claude C. Gillham. Elko County, Nevada. August 31, 1920. Plate 6-B in U.S. Geological Survey. Bulletin 741. 1923. #1:/Nevada-Bulletin 741/sfc1702i ID. Schrader, F.C. 1702i Crest of Crater Range, middle part, looking south from Jarbidge Peak, rugged topography is old rhyolite at of Jarbidge River in right background; heavy flow bedding in old rhyolite near head of East Fork in left background. Dark lava caps old rhyolite in Black Peak. Features identified left right are; south slope of Jarbidge Peak East Fork near head, Black Peak (center), Mary's River Peak, head of Jarbidge River. Photo by Claude C. Gillham. Elko County, Nevada. August 31, 1920. Plate 6-B in U.S. Geological Survey. Bulletin 741. 1923. #1:/Nevada-Bulletin 741/sfc1702q ID. Schrader, F.C. 1702q Photomicrograph of adularia in silver-gold ore in rhyolite, showing normal occurrence, crystallization and habit. The smooth light colored areas are quartz; the black are argentite and pyrite; plain light; magnified 380 diameters. Elko County, Nevada. 1920. Plate 11-A in U.S. Geological Survey. Bulletin 741. 1923. #1:/Stose G.W. Collection/sgw00070 ID. Stose, G.W. 70 Alluvial fan north side of South Fork Mineral Creek. San Juan County, Colorado.n.d. #1:/Chesapeake and Ohio Canal National Historic Park/sgw00231 ID. Stose, G.W. 231 Chesapeake and Ohio Canal National Historic Park, Maryland, Virginia, West Virginia. Fluted rocks near the mouth of Great Cacapon River, looking north. The resistant beds are the Keefer Sandstone Member of the McKenzie Formation. The folds are largely concealed by summer foliage. Plate 10, U.S. Geological Survey Folio 179. #1:/Chesapeake and Ohio Canal National Historic Park/sgw00281 ID. Stose, G.W. 281 Chesapeake and Ohio Canal National Historic Park, Maryland, Virginia, West Virginia. Potomac River above Cacapon Mountain, looking west from the silica sand mine on Cacapon Mountain. Sideling Hill Gap in the distance. Tonoloway Ridge on the right. High terraces shown on both sides of the river. Plate 1, U.S. Geological Survey Folio 179. #1:/Stose G.W. Collection/sgw00329 ID. Stose, G.W. 329 Creep in vertical Romney shale in Western Maryland Railroad cut 1 mile west of Great Cacapon. Washington County, Maryland.n.d. Plate 15 in U.S. Geological Survey. Folio 179. 1912. #1:/Gettysburg National Military Park/sgw00373 ID. Stose, G.W. 373 Gettysburg National Military Park, Pennsylvania. Devils Den, rocky ledges of diabase of the Gettysburg Sill, northwest of Round Top. Here part of the Battle of Gettysburg was fought hand to hand. Plate 7, U.S. Geological Survey Folio 225. #1:/Gettysburg National Military Park/sgw00374 ID. Stose, G.W. 374 Gettysburg National Military Park, Pennsylvania. Devils Den, a massive diabase, showing vertical jointing. See also photo sgw00375. #1:/Gettysburg National Military Park/sgw00375 ID. Stose, G.W. 375 Gettysburg National Military Park, Pennsylvania. Devils Den, a massive diabase, showing vertical jointing. This view is closer and just to the right of photo sgw00374. #1:/Stose G.W. Collection/sgw00391 ID. Stose, G.W. 391 Rectilinear jointing in Chemug sandstone 1.5 miles west of Stotlers crossroads. Morgan County, West Virginia.n.d. Plate 13 in U.S. Geological Survey. Folio 179. 1912. #1:/Gettysburg National Military Park/sgw00431 ID. Stose, G.W. 431 Gettysburg National Military Park, Pennsylvania. General Lee's headquarters at Gettysburg which is made of local Triassic brown sandstone. #1:/Gettysburg National Military Park/sgw00432 ID. Stose, G.W. 432 Gettysburg National Military Park, Pennsylvania. Roundtop and other diabase knobs, viewed to the south from the observation tower in the park. #1:/Chesapeake and Ohio Canal National Historic Park/sgw00624 ID. Stose, G.W. 624 Chesapeake and Ohio Canal National Historic Park, Maryland, Virginia, West Virginia. Detail of the most prominent anticline and adjacent synclines of the fluted rocks on Great Cacapon River. Plate 11, U.S. Geological Survey Folio 179. #1:/Chesapeake and Ohio Canal National Historic Park/sgw00625 ID. Stose, G.W. 625 Chesapeake and Ohio Canal National Historic Park, Maryland, Virginia, West Virginia. Symmetrical anticline of Bloomsburg Red Sandstone Member of the Wills Creek Shale in the bank of the Chesapeake & Ohio Canal east of the old cement works at Roundtop. View is north. Plate 17, U.S. Geological Survey Folio 179. #1:/Natural Bridges National Monument/sgw00681 ID. Stose, G.W. 681 Natural Bridges National Monument, Utah. Owachomo Bridge spans 180 feet and is 106 feet high and 9 feet thick. Photo by C. Goodman, Department of the Interior. #1:/Delaware Water Gap National Recreation Area/sgw00809 ID. Stose, G.W. 809 Delaware Water Gap National Recreation Area, Pennsylvania. View is from railroad level, looking southeast, near Dunfield. #1:/Delaware Water Gap National Recreation Area/sgw00810 ID. Stose, G.W. 810 Delaware Water Gap National Recreation Area, Pennsylvania. View is from part way up the mountain, looking southeast, near Dunfield. #1:/Delaware Water Gap National Recreation Area/sgw00845 ID. Stose, G.W. 845 Delaware Water Gap National Recreation Area, Pennsylvania. Skyline of Kittatinny Range in the distance represents Schooley Peneplain. Upland on either side of the valley represents Harrisburg Peneplain. The Delaware River in the vicinity of Manunka Chunk is in the foreground. View is from the southeast. Plate 81, U.S. Geological Survey Professional Paper 60. #1:/Catoctin Mountain Park/sgw01716 ID. Stose, G.W. 1716 Catoctin Mountain Park, Maryland. Hamburg fire tower on Catoctin Mountain. #1:/Catoctin Mountain Park/sgw01719 ID. Stose, G.W. 1719 Catoctin Mountain Park, Maryland. Catoctin Mountain, viewed from Jefferson Pike. #1:/Catoctin Mountain Park/sgw01720 ID. Stose, G.W. 1720 Catoctin Mountain Park, Maryland. Short Hill-Blue Ridge, viewed from Catoctin Mountain. #1:/Catoctin Mountain Park/sgw01750 ID. Stose, G.W. 1750 Catoctin Mountain Park, Maryland. Chimney Rock on Catoctin Mountain, west of Thurmont. #1:/Catoctin Mountain Park/sgw01751 ID. Stose, G.W. 1751 Catoctin Mountain Park, Maryland. West side of Chimney Rock on Catoctin Mountain. #1:/Catoctin Mountain Park/sgw01752 ID. Stose, G.W. 1752 Catoctin Mountain Park, Maryland. Chimney Rock, viewed from the southeast. #1:/Chesapeake and Ohio Canal National Historic Park/sgw01780 ID. Stose, G.W. 1780 Chesapeake and Ohio Canal National Historic Park, Maryland, Virginia, West Virginia. Potomac River Gap in Blue Ridge at Harpers Ferry, viewed from Keeptryst. White Weverton quartzite cliffs across the river. #1:/Death Valley National Park/sgw02349 ID. Stose, G.W. 2349 Death Valley National Park, California. Salt beds on the floor of Death Valley, viewed from Dantes View. 1940. #1:/Death Valley National Park/sgw02350 ID. Stose, G.W. 2350 Death Valley National Park, California. View is down Furnace Creek Wash toward Zabriskie Point, showing red and white beds of the Furnace Creek Formation. 1940. #1:/Death Valley National Park/sgw02351 ID. Stose, G.W. 2351 Death Valley National Park, California. Red and white beds of the Furnace Creek Formation, viewed from Zabriskie Point. Panamint Range in the distance. 1940. #1:/Death Valley National Park/sgw02352 ID. Stose, G.W. 2352 Death Valley National Park, California. Natural bridge and tortuous gorge in Pliocene fanglomerate on the west slope of Black Mountain near Badwater. 1940. #1:/Death Valley National Park/sgw02353 ID. Stose, G.W. 2353 Death Valley National Park, California. Salt flats at Badwater, viewed from the mouth of Natural Bridge Canyon. Panamint Range beyond. 1940. #1:/Craters of the Moon National Monument/sht00190 ID. Stearns, H.T. 190 Craters of the Moon National Monument, Idaho. Southeast from the south rim of Big Crater along the Great Rift, showing hornitos and Big Cinder Butte. August 25, 1923. #1:/Hawaii Volcanoes National Park/sht00262 ID. Stearns, H.T. 262 Hawaii Volcanoes National Park. May 1924 eruption of Kilauea Volcano. Halemaumau Crater. Rocks showering down on the right. The cloud base is at 3,200 feet. The cloud is 3,300 feet high and rising at about 55 feet per second. 8:11 a.m., May 22, 1924. #1:/Hawaii Volcanoes National Park/sht00263 ID. Stearns, H.T. 263 Hawaii Volcanoes National Park. May 1924 eruption of Kilauea Volcano. Two minutes after the beginning of the 8:10 a.m. explosion in Halemaumau Crater. The cloud is 5,400 feet high and rising at a rate of about 35 feet per second. 8:12 a.m., May 22, 1924. #1:/Hawaii Volcanoes National Park/sht00265 ID. Stearns, H.T. 265 Hawaii Volcanoes National Park. May 1924 eruption of Kilauea Volcano. Halemaumau Crater, viewed from the Hawaiian Volcano Observatory. The cloud is 8,000 feet high and rising at 17 feet per second. 8:14 a.m., May 22, 1924. #1:/Hawaii Volcanoes National Park/sht00266 ID. Stearns, H.T. 266 Hawaii Volcanoes National Park. May 1924 eruption of Kilauea Volcano. Halemaumau Crater. The cloud is 10,000 feet high and rising at about 16 feet per second. 8:16 a.m., May 22, 1924. #1:/Hawaii Volcanoes National Park/sht00267 ID. Stearns, H.T. 267 Hawaii Volcanoes National Park. May 1924 eruption of Kilauea Volcano. Halemaumau Crater, viewed from the Hawaiian Volcano Observatory.H. Palmer and J. Stokes seen in the foreground. The cloud is 11,500 feet high and rising at the rate of 13 feet per second. 8:18 a.m., May 22, 1924. Plate 26-B, U.S. Geological Survey Water-Supply Paper 616. #1:/Hawaii Volcanoes National Park/sht00268 ID. Stearns, H.T. 268 Hawaii Volcanoes National Park. May 1924 eruption of Kilauea Volcano. Halemaumau Crater. The cloud is over 12,000 feet high. 8:19 a.m., May 22, 1924. #1:/Hawaii Volcanoes National Park/sht00271 ID. Stearns, H.T. 271 Hawaii Volcanoes National Park. May 1924 eruption of Kilauea Volcano. Ten-ton block ejected 3,500 feet from the center of Halemaumau Crater at about 1#1:15 a.m., May 18, 1924. Tai Sing Loo, 0. Emerson, and J. Stokes standing around it. Photo by H.T. Stearns, May 22, 1924. Plate 20-C, U.S. Geological Survey Water-Supply Paper 616. #1:/Hawaii Volcanoes National Park/sht00272 ID. Stearns, H.T. 272 Hawaii Volcanoes National Park. May 1924 eruption of Kilauea Volcano. This rock was hurled out of Halemaumau Crater one hour before the photograph was taken. It sits nearly 5,000 feet from the center of the crater on a 1921 lava flow. (?) Kirkpatrick, H. Palmer, (?) Gregory, J. Stokes standing around it. 9:00 a.m., May 22, 1924. #1:/Hawaii Volcanoes National Park/sht00301 ID. Stearns, H.T. 301 Hawaii Volcanoes National Park. Double natural rock bridge on the Kalapana coast. 1924. Photo by W.O. Clark. #1:/Hawaii Volcanoes National Park/sht00309 ID. Stearns, H.T. 309 Hawaii Volcanoes National Park. Wild goats and burros at Puu Kapukapu near the Pacific Coast. Photo by W.O. Clark, 1924. #1:/Hawaii Volcanoes National Park/sht00320 ID. Stearns, H.T. 320 Hawaii Volcanoes National Park. Madame Pele, driblet spire on Kamooalii source fissure 1 mile north of Kamakaia Hills. Photo by W.O. Clark, November 1924. Plate 25-A, U.S. Geological Survey Water-Supply Paper 616. #1:/Hawaii Volcanoes National Park/sht00324 ID. Stearns, H.T. 324 Hawaii Volcanoes National Park. Aborescent aa lava on the Maunaiki lava flow of 1920 on Kilauea Volcano, 100 feet south of Kamakaia Trail. Photo by W.O. Clark, 1921. Plate 11-A, U.S. Geological Survey Water-Supply Paper 616. See also photo sht00325. #1:/Hawaii Volcanoes National Park/sht00325 ID. Stearns, H.T. 325 Hawaii Volcanoes National Park. Aborescent aa lava, on the Maunaiki lava flow of 1920 on Kilauea Volcano, 100 feet south of Kamakaia Trail. Photo by W.O. Clark, 1921. Plate 11-B, U.S. Geological Survey Water-Supply Paper 616. See also photo sht00324. #1:/Hawaii Volcanoes National Park/sht00330 ID. Stearns, H.T. 330 Hawaii Volcanoes National Park. Ancient Hawaiian trail of smooth stone across the 1823 Keaiwa (seaward) flow of Kilauea Volcano. July 10, 1924. #1:/Hawaii Volcanoes National Park/sht00333 ID. Stearns, H.T. 333 Hawaii Volcanoes National Park. Lava tree mold with pieces of partly charred wood, which are remnants of the top of tree, on the 1823 lava flow of Kilauea Volcano. Photo by H.T. Stearns, July 11, 1924. Plate 10-A, U.S. Geological Survey Water-Supply Paper 616. #1:/Hawaii Volcanoes National Park/sht00335 ID. Stearns, H.T. 335 Hawaii Volcanoes National Park. Lava ball from the 1823 lava flow of Kilauea Volcano on the wall of the Great Crack near Puna trail crossing. 1924. Plate 9-A, U.S. Geological Survey Water-Supply Paper 616. See also photo sht0335a. #1:/Hawaii Volcanoes National Park/sht00336 ID. Stearns, H.T. 336 Hawaii Volcanoes National Park. Lava tree mold on the 1823 flow of Kilauea Volcano near upper Puna trail. 1924. Photo by W.O. Clark. #1:/Hawaii Volcanoes National Park/sht00343 ID. Stearns, H.T. 343 Hawaii Volcanoes National Park. Effect of wind on an ohia-lehua tree, 1 mile south of Kamakaia Peak. August 13, 1924. #1:/Hawaii Volcanoes National Park/sht00345 ID. Stearns, H.T. 345 Hawaii Volcanoes National Park. Pressure dome driblet on a prehistoric lava flow near Puu Kou in the Kau Desert. Photo by H.T. Stearns, August 8, 1924. Plate 24-A, U.S. Geological Survey Water-Supply Paper 616. #1:/Hawaii Volcanoes National Park/sht00346 ID. Stearns, H.T. 346 Hawaii Volcanoes National Park. Puu Kou, a prehistoric cone of pahoehoe in the Kau Desert. Photo by H.T. Stearns, August 8, 1924. Plate 24-B, U.S. Geological Survey Water-Supply Paper 616. #1:/Hawaii Volcanoes National Park/sht00347 ID. Stearns, H.T. 347 Hawaii Volcanoes National Park. Pressure dome driblet half a mile south of Kamakaia Peak. August 13, 1924. #1:/Hawaii Volcanoes National Park/sht00378 ID. Stearns, H.T. 378 Hawaii Volcanoes National Park. Mokuaweoweo, the summit caldera of Mauna Loa Volcano. Charles Stone, Jr. with a pack outfit at the 13,440 feet head of Ainapo trail. August 19, 1924. #1:/Hawaii Volcanoes National Park/sht00384 ID. Stearns, H.T. 384 Hawaii Volcanoes National Park. One of the three fissures trending northeast from the northeast rim of Mokuaweoweo, summit caldera of Mauna Loa Volcano, viewed from 200 feet from the rim of Volcano House Trail. It shows the cone of Hanalei in the distance. Note the bomb-shaped balls on the fissure. The crack has ice in it. The lining is red, and the outside is a satiny brown olivine lava and very frothy. The fissure was an upper source of the 1881 lava flow. Photo by H.T. Stearns, August 22, 1924. Plate 20-B, U.S. Geological Survey Water-Supply Paper 616. #1:/Hawaii Volcanoes National Park/sht00388 ID. Stearns, H.T. 388 Hawaii Volcanoes National Park. Active solfatara 50 feet west of the largest 1914 cone in the center near the 1903 lava lake in Mokuaweoweo, summit caldera of Mauna Loa Volcano. Crystalline sulfur formed here. August 20, 1924. #1:/Hawaii Volcanoes National Park/sht00391 ID. Stearns, H.T. 391 Hawaii Volcanoes National Park. Northeast along the fissure zone in Mokuaweoweo, summit caldera of Mauna Loa Volcano, showing the cone chains, the cone of 1914, and the fuming solfatara on the floor of the crater. Photo by H.T. Stearns, August 21, 1924. Plate 12-A, U.S. Geological Survey Water-Supply Paper 616. #1:/Hawaii Volcanoes National Park/sht00392 ID. Stearns, H.T. 392 Hawaii Volcanoes National Park. The Beehive, a driblet cone in the southeast corner of the crater of Pohaku Hanalei over a fissure. August 21, 1924. #1:/Hawaii Volcanoes National Park/sht00395 ID. Stearns, H.T. 395 Hawaii Volcanoes National Park. Southwest to the frozen lava lake of 1914 on the floor of Mokuaweoweo, summit caldera of Mauna Loa, in which rise islands of aa. In the background are sulfur fumes rising from a patch of khaki-colored pumice. The islands in the extinct lava lake between Na Puu Wainapono and the large cone on the southwest end of the floor are bench lava. Note aa in cracks of the crust. Photo by H.T. Stearns, August 20, 1924. Plate 13-A, U.S. Geological Survey Water-Supply Paper 616. #1:/Hawaii Volcanoes National Park/sht00397 ID. Stearns, H.T. 397 Hawaii Volcanoes National Park. Mokuaweoweo, summit caldera of Mauna Loa Volcano, viewed from the head of Ainapo trail, looking toward the south gap. Note the contrast between the old and new lava floors and the cascade on the southwest wall. August 21, 1924. Photos sht00397, sht00398, sht00399, sht00400, and sht00401 form a panorama. #1:/Hawaii Volcanoes National Park/sht00398 ID. Stearns, H.T. 398 Hawaii Volcanoes National Park. Mokuaweoweo, summit caldera of Mauna Loa Volcano, viewed from the head of Ainapo trail, looking west-southwest. Note the highest cone in the crater. August 21, 1924. Photos sht00397, sht00398, sht00399, sht00400, and sht00401 form a panorama. #1:/Hawaii Volcanoes National Park/sht00399 ID. Stearns, H.T. 399 Hawaii Volcanoes National Park. Mokuaweoweo, summit caldera of Mauna Loa Volcano, viewed from the head of Ainapo trail, looking west. Note the solfatara. August 21, 1924. Photos sht00397, sht00398, sht00399, sht00400, and sht00401 form a panorama. #1:/Hawaii Volcanoes National Park/sht00400 ID. Stearns, H.T. 400 Hawaii Volcanoes National Park. Mokuaweoweo, summit caldera of Mauna Loa Volcano, viewed from the head of Ainapo trail, looking north. Note Na Puu Wainapona and the fault on the opposite side. August 21, 1924. Photos sht00397, sht00398, sht00399, sht00400, and sht00401 form a panorama. #1:/Hawaii Volcanoes National Park/sht00401 ID. Stearns, H.T. 401 Hawaii Volcanoes National Park. Mokuaweoweo, summit caldera of Mauna Loa Volcano, viewed from the head of Ainapo trail, looking northeast to Mauna Kea and the northeast gap. August 21, 1924. Photos sht00397, sht00398, sht00399, sht00400, and sht00401 form a panorama. #1:/Haleakala National Park/sht00438 ID. Stearns, H.T. 438 Haleakala National Park, Hawaii. Rest house on the rim of Haleakala Crater. November 22, 1924. #1:/Haleakala National Park/sht00444 ID. Stearns, H.T. 444 Haleakala National Park, Hawaii. Divide between Koolau and Kaupo Gaps, Haleakala Crater. November 23, 1924. #1:/Haleakala National Park/sht00447 ID. Stearns, H.T. 447 Haleakala National Park, Hawaii. Haleakala Crater. Dikes in the wall of the crater between Koolau and Kaupo Gaps. Note the recent lava smear near the dikes. November 23, 1924. #1:/Crater Lake National Park/sht00500 ID. Stearns, H.T. 500 Crater Lake National Park, Oregon. Looking north from Eagle Dove Trail to Wizard Island and Llao Rock, Devils Backbone. August 31, 1925. #1:/Hawaii Volcanoes National Park/sht00526 ID. Stearns, H.T. 526 Hawaii Volcanoes National Park. Entrance to Thurston lava tube in the First Twin Crater on the road from Volcano House to Halemaumau Crater. Photo by T. Kelsey. Plate 26-A, U.S. Geological Survey Water-Supply Paper 616. #1:/Hawaii Volcanoes National Park/sht00527 ID. Stearns, H.T. 527 Hawaii Volcanoes National Park. "Bombe de Roulement" on the Keamoku flow from Mauna Loa Volcano, near Volcano Road about 6 miles southwest of Volcano House. Photo by T. Boles, U.S National Park Service. Plate 20-A, U.S. Geological Survey Water-Supply Paper 616. #1:/Hawaii Volcanoes National Park/sht00534 ID. Stearns, H.T. 534 Hawaii Volcanoes National Park. Halemaumau lava lake. Photo by T.A. Jagger, September 9, 1920. Plate 13-B, U.S. Geological Survey Water-Supply Paper 616. #1:/Craters of the Moon National Monument/sht00559 ID. Stearns, H.T. 559 Craters of the Moon National Monument, Idaho. Northeast from the Idaho Central Highway near Grassy Cone across the dune-like topography to Sunset Cone. September 5, 1926. Plate 14-B, U.S. Geological Survey Water-Supply Paper 774. #1:/Craters of the Moon National Monument/sht00560 ID. Stearns, H.T. 560 Craters of the Moon National Monument, Idaho. North Crater and the last pahoehoe flow which issued from it. Cinder crag in the foreground. September 25, 1926. Plate 16-A, U.S. Geological Survey Water-Supply Paper 774. #1:/Craters of the Moon National Monument/sht00561 ID. Stearns, H.T. 561 Craters of the Moon National Monument, Idaho. Northeast lava flow, viewed from Big Craters Butte. The rough bristling, jagged kind of lava is known as aa. Walking over such rock is extremely slow and hazardous. September 25, 1926. #1:/Craters of the Moon National Monument/sht00562 ID. Stearns, H.T. 562 Craters of the Moon National Monument, Idaho. Southeast to Crystal or Bottomless Pit. October 6, 1926. #1:/Craters of the Moon National Monument/sht00563 ID. Stearns, H.T. 563 Craters of the Moon National Monument, Idaho. East toward old cinder Kipuka, one-eighth of a mile west of Crystal Pit, showing tongues of lava and lava channel in the flow from Great Rift. October 5, 1926. #1:/Craters of the Moon National Monument/sht00564 ID. Stearns, H.T. 564 Craters of the Moon National Monument, Idaho. Last slop-over of lava on the slope of Big Craters Butte at the end of the automobile road. 1926. #1:/Craters of the Moon National Monument/sht00565 ID. Stearns, H.T. 565 Craters of the Moon National Monument, Idaho. "Age tree" growing in the tongue of Big Crater pahoehoe flow at the edge of a crag 1.25 miles due west from the top of Silent Cone in the background.E. Martin beneath the tree branch in lower center. This Limber pine tree was cut down to count the rings showing it is 457 years old and has been dead about two years. October 17, 1926. #1:/Craters of the Moon National Monument/sht00566 ID. Stearns, H.T. 566 Craters of the Moon National Monument, Idaho. This Limber pine tree was cut down to count the rings showing it is 457 years old and has been dead about two years. October 17, 1926. #1:/Craters of the Moon National Monument/sht00567 ID. Stearns, H.T. 567 Craters of the Moon National Monument, Idaho. Obsidian Crag, Devil's Orchard, SE 1/4 SE 1/4 Sec. 36, T. 2 N, R. 24 E. Mr. Paisley points to the obsidian layers in this cone remnant. September 26, 1926. #1:/Craters of the Moon National Monument/sht00568 ID. Stearns, H.T. 568 Craters of the Moon National Monument, Idaho. Round Knoll, an ancient grass- covered cinder cone, stands as a yellow island in a sea of black lava. October 6, 1926. #1:/Craters of the Moon National Monument/sht00569 ID. Stearns, H.T. 569 Craters of the Moon National Monument, Idaho. Aa lava flow at the Hoodoo Water Hole near Round Knoll. October 6, 1926. Plate 17-B, U.S. Geological Survey Water-Supply Paper 774. #1:/Craters of the Moon National Monument/sht00570 ID. Stearns, H.T. 570 Craters of the Moon National Monument, Idaho. "Frozen" cascade of pahoehoe east of Surprise Cave about three-quarters of a mile north of Needles Cave. October 6, 1926. #1:/Craters of the Moon National Monument/sht00571 ID. Stearns, H.T. 571 Craters of the Moon National Monument, Idaho. The impressions of charred logs and the molds of tree trunks are preserved in some places in pahoehoe lava half a mile south of Owl Cavern. September 26, 1926. #1:/Craters of the Moon National Monument/sht00572 ID. Stearns, H.T. 572 Craters of the Moon National Monument, Idaho. Entrance to Great Owl Cavern, the most perfect lava tube or cavern in the Monument. A small spatter cone can be seen in the middle ground. September 26, 1926. #1:/Craters of the Moon National Monument/sht00573 ID. Stearns, H.T. 573 Craters of the Moon National Monument, Idaho. Looking out Indian Tunnel, a lava tube. September 27, 1926. #1:/Craters of the Moon National Monument/sht00574 ID. Stearns, H.T. 574 Craters of the Moon National Monument, Idaho. Entrance to Indian Tunnel, the largest and most accessible lava tube in the Monument.S.A. Paisley on the ladder on the left. September 27, 1926. #1:/Craters of the Moon National Monument/sht00575 ID. Stearns, H.T. 575 Craters of the Moon National Monument, Idaho. The natural bridges are small remnants of the tunnel roof that were left standing after the collapse that followed the draining away of the lava river. This natural bridge is half a mile east of Dewdrop Cave. October 6, 1926. #1:/Craters of the Moon National Monument/sht00576 ID. Stearns, H.T. 576 Craters of the Moon National Monument, Idaho. The Highway aa lava flow, viewed from Sunset Cone. Grassy Cone in the left background. September 28, 1926. #1:/Craters of the Moon National Monument/sht00578 ID. Stearns, H.T. 578 Craters of the Moon National Monument, Idaho. Ropy lava on the surface of the North Crater pahoehoe flow northeast of Surprise Cave. October 6, 1926. Plate 17-A, U.S. Geological Survey Water-Supply Paper 774. #1:/Craters of the Moon National Monument/sht00579 ID. Stearns, H.T. 579 Craters of the Moon National Monument, Idaho. Near Devil's Garden. In places, pahoehoe breaks up like slush ice on a river in spring. September 26, 1926. #1:/Craters of the Moon National Monument/sht00580 ID. Stearns, H.T. 580 Craters of the Moon National Monument, Idaho. Fault escarpment on an unnamed cone half a mile southeast of Big Sink Water Hole. October 6, 1926. #1:/Craters of the Moon National Monument/sht00581 ID. Stearns, H.T. 581 Craters of the Moon National Monument, Idaho. Dark yawning fissures break the barren surface of Broken Top. Note the flattened (volcanic) bombs. October 6, 1926. #1:/Craters of the Moon National Monument/sht00582 ID. Stearns, H.T. 582 Craters of the Moon National Monument, Idaho. Cracked and fissured surface of a billowy pahoehoe lava flow northeast of Big Cinder Butte. October 9, 1926. #1:/Craters of the Moon National Monument/sht00583 ID. Stearns, H.T. 583 Craters of the Moon National Monument, Idaho. The narrow ledges parallel to the floor of Buffalo Caves are the shore lines of a subsiding river of lava. October 6, 1926. #1:/Craters of the Moon National Monument/sht00584 ID. Stearns, H.T. 584 Craters of the Moon National Monument, Idaho.U.S. Geological Survey camp in the shadow of Echo Crater wall. October 14, 1926. #1:/Craters of the Moon National Monument/sht00585 ID. Stearns, H.T. 585 Craters of the Moon National Monument, Idaho. Mr. Paisley watering a horse at Little Prairie Water Hole. October 14, 1926. #1:/Craters of the Moon National Monument/sht00586 ID. Stearns, H.T. 586 Craters of the Moon National Monument, Idaho. In the central part of the Monument, the old cinder cone called The Watchman reopened, and lava flowed quietly from the northwest and southeast sides. October 14, 1926. #1:/Craters of the Moon National Monument/sht00587 ID. Stearns, H.T. 587 Craters of the Moon National Monument, Idaho. Crescentric piles of rocks which weighted down Indian tepees are numerous near Indian Tunnel. September 27, 1926. #1:/Craters of the Moon National Monument/sht00589 ID. Stearns, H.T. 589 Craters of the Moon National Monument, Idaho. Southeast from the summit of Big Cinder Butte, showing the line of cones in the Great Rift Zone. Symmetrical crater bowl in the foreground. October 16, 1926. Plate 14-A, U.S. Geological Survey Water-Supply Paper 774. #1:/Craters of the Moon National Monument/sht00590 ID. Stearns, H.T. 590 Craters of the Moon National Monument, Idaho. Sheep Trail Mountain Cinder cone, viewed from the northeast. October 13, 1926. #1:/Craters of the Moon National Monument/sht00591 ID. Stearns, H.T. 591 Craters of the Moon National Monument, Idaho. Lower Vermillion Chasm, caused by a fissure eruption, looking southeast. October 12, 1926. #1:/Craters of the Moon National Monument/sht00592 ID. Stearns, H.T. 592 Craters of the Moon National Monument, Idaho. Perfect crater bowl in the summit of a very symmetrical cone at the north end of Two Point Butte. Fissure Butte and Sheep Trail Butte in the background. October 13, 1926. Plate 15-A, U.S. Geological Survey Water-Supply Paper 774. #1:/Craters of the Moon National Monument/sht00593 ID. Stearns, H.T. 593 Craters of the Moon National Monument, Idaho. Bridge of the Moon, a lava tube at the southeast end of the Monument. October 15, 1926. #1:/Craters of the Moon National Monument/sht00594 ID. Stearns, H.T. 594 Craters of the Moon National Monument, Idaho. Bridge of the Moon, showing the graceful arch, from the interior, of a lava tunnel. October 15, 1926. #1:/Craters of the Moon National Monument/sht00601 ID. Stearns, H.T. 601 Craters of the Moon National Monument, Idaho. Natural size specimen of lava stalactite from the under surface of the crust of a pahoehoe lava flow (top). In contrast to a lava stalactite from the roof of a lava tunnel (bottom). 1926. #1:/Craters of the Moon National Monument/sht00602 ID. Stearns, H.T. 602 Craters of the Moon National Monument, Idaho. Lava stalactites from lava tubes. 1926. #1:/Craters of the Moon National Monument/sht00603 ID. Stearns, H.T. 603 Craters of the Moon National Monument, Idaho. Small spindle and ribbon bombs found on the cones. 1926. #1:/Craters of the Moon National Monument/sht00604 ID. Stearns, H.T. 604 Craters of the Moon National Monument, Idaho. Natural size lava stalactites from the caves. They were formed by the dripping of hot lava from the roofs of the tunnels. 1926. #1:/Craters of the Moon National Monument/sht00605 ID. Stearns, H.T. 605 Craters of the Moon National Monument, Idaho. Natural size bread crust bomb from North Crater. 1926. #1:/Craters of the Moon National Monument/sht00606 ID. Stearns, H.T. 606 Craters of the Moon National Monument, Idaho. Natural size yellow pumice adhering to a basalt cinder from North Crater. 1926. #1:/Craters of the Moon National Monument/sht00607 ID. Stearns, H.T. 607 Craters of the Moon National Monument, Idaho. Natural size ribbon bomb "frozen" to a cinder. These long strips of lava have broken off the spindle bombs or owe their origin to the pulling apart of two clots of lava traveling at slightly different speeds or in different directions. 1926. #1:/Craters of the Moon National Monument/sht00608 ID. Stearns, H.T. 608 Craters of the Moon National Monument, Idaho. Impression of a charred log in Lava. Circa 1926. #1:/Craters of the Moon National Monument/sht00609 ID. Stearns, H.T. 609 Craters of the Moon National Monument, Idaho. Under surface of a lava clot (natural size) found near Trench Mortar Flat Fissure. Note lapilli adhering to it. #1:/Crater Lake National Park/sht00641 ID. Stearns, H.T. 641 Crater Lake National Park, Oregon. Pumiceous mud flow at the Pinnacles near the east entrance to the park. Note the dark color of the upper bed. August 9, 1925. #1:/St. Francis Dam Flood March 12-13, 1928/sht00664 ID. Stearns, H.T. 664 St. Francis Dam Flood March 12-13, 1928, Los Angeles County, California. St. Francis Dam before the 1928 failure. Photo courtesy of the Los Angeles Bureau of Power and Light. #1:/St. Francis Dam Flood March 12-13, 1928/sht00665 ID. Stearns, H.T. 665 St. Francis Dam Flood March 12-13, 1928, Los Angeles County, California. Taken from the same location as photo sht00664, showing the remains of the dam and reservoir floor. The dam failed at 1#1:58 p.m. Monday March 12, 1928, according to the water storage recorder on the dam. 20 minutes prior to that time, the water was slowly dropping in the reservoir indicating that leakage was increasing. The flood destroyed the power house about 1 mile below the dam at 12:04 a.m. March 13, 1928. The left (west) abutment of the dam was entirely swept away. Contact of schist and conglomerate is clearly shown. March 17, 1928. #1:/St. Francis Dam Flood March 12-13, 1928/sht00667 ID. Stearns, H.T. 667 St. Francis Dam Flood March 12-13, 1928, Los Angeles County, California. West from the east abutment of the dam showing the center block and wing wall. Note the water stage recorder shelter and contact of schist and conglomerate. March 17, 1928. #1:/St. Francis Dam Flood March 12-13, 1928/sht00668 ID. Stearns, H.T. 668 St. Francis Dam Flood March 12-13, 1928, Los Angeles County, California. Landslips in the schist that developed on the east abutment as a result of failure of the dam and draining of the reservoir. Note displacement of the road. March 17, 1928. #1:/St. Francis Dam Flood March 12-13, 1928/sht00670 ID. Stearns, H.T. 670 St. Francis Dam Flood March 12-13, 1928, Los Angeles County, California. Looking downstream to huge blocks of cement at the base of the east abutment of the dam. Note dust clouds in the background from landslides that were still in progress. March 17, 1928. #1:/St. Francis Dam Flood March 12-13, 1928/sht00674 ID. Stearns, H.T. 674 St. Francis Dam Flood March 12-13, 1928, Los Angeles County, California. Downstream toward the former location of the west abutment of the dam. The entire concrete abutment has been removed. Contact of schist and conglomerate is very distinct near the center. March 17, 1928. #1:/St. Francis Dam Flood March 12-13, 1928/sht00679 ID. Stearns, H.T. 679 St. Francis Dam Flood March 12-13, 1928, Los Angeles County, California. Final resting place of several huge concrete blocks from the west abutment of the dam, about one-third of a mile downstream from the dam. The tractor in the foreground marks the flood water line. March 17, 1928. #1:/St. Francis Dam Flood March 12-13, 1928/sht00682 ID. Stearns, H.T. 682 St. Francis Dam Flood March 12-13, 1928, Los Angeles County, California. Huge concrete block from the west abutment of the dam about half a mile below the dam. The block is approximately 63 feet long, 30 feet high, and 54 feet wide. Note the dam wing wall in the distance. March 17, 1928. #1:/St. Francis Dam Flood March 12-13, 1928/sht00683 ID. Stearns, H.T. 683 St. Francis Dam Flood March 12-13, 1928, Los Angeles County, California. All that remains of the homes of fifty people at Power Plant 2 in a tributary valley of San Francisquito Canyon. Eleven bodies were picked up from this debris and others still remain. March 17, 1928. #1:/St. Francis Dam Flood March 12-13, 1928/sht00685 ID. Stearns, H.T. 685 St. Francis Dam Flood March 12-13, 1928, Los Angeles County, California. The turbines and penstocks at Power House no. 2, 1.5 miles below the dam. The tracks below the flood line were just installed. March 17, 1928. #1:/St. Francis Dam Flood March 12-13, 1928/sht00687 ID. Stearns, H.T. 687 St. Francis Dam Flood March 12-13, 1928, Los Angeles County, California. San Francisquito Canyon, viewed from the hilltop about half a mile below Power House no.2. Note the gravel bar formed by the flood in the foreground. March 17, 1928. #1:/St. Francis Dam Flood March 12-13, 1928/sht00690 ID. Stearns, H.T. 690 St. Francis Dam Flood March 12-13, 1928. Concrete highway between Castic and Piru, California, washed out by the flood. March 18, 1928. #1:/St. Francis Dam Flood March 12-13, 1928/sht00691 ID. Stearns, H.T. 691 St. Francis Dam Flood March 12-13, 1928. Railroad track between Castic Junction and Piru, California, dropped on the highway by the flood. Men and horse team working the debris in the background. March 18, 1928. #1:/St. Francis Dam Flood March 12-13, 1928/sht00693 ID. Stearns, H.T. 693 St. Francis Dam Flood March 12-13, 1928. Flood-twisted railroad track between Castic Junction and Piru, California. March 18, 1928. #1:/St. Francis Dam Flood March 12-13, 1928/sht00694 ID. Stearns, H.T. 694 St. Francis Dam Flood March 12-13, 1928. Thirty automobiles are all that remain of the California Edison Construction Camp near Piru, California. Eighty nine perished here. March 18, 1928. #1:/St. Francis Dam Flood March 12-13, 1928/sht00696 ID. Stearns, H.T. 696 St. Francis Dam Flood March 12-13, 1928. Flood wreckage in Santa Paula, California. March 18, 1928. #1:/St. Francis Dam Flood March 12-13, 1928/sht00697 ID. Stearns, H.T. 697 St. Francis Dam Flood March 12-13, 1928. Street scene in Santa Paula, California, after the flood. Side walls of homes are gone. March 18, 1928. #1:/St. Francis Dam Flood March 12-13, 1928/sht00699 ID. Stearns, H.T. 699 St. Francis Dam Flood March 12-13, 1928. Santa Paula, California, houses piled against each other after the flood. Clean up crews at work. March 18, 1928. #1:/St. Francis Dam Flood March 12-13, 1928/sht00700 ID. Stearns, H.T. 700 St. Francis Dam Flood March 12-13, 1928. House lying on its side in a walnut grove near Santa Paula, California, after the flood. March 18, 1928. #1:/Stearns H.T. Collection/sht0241i ID. Stearns, H.T. 241 Pisolitic ash from Tanner's Quarry, Menan Butte. Note bedding plane is depressed by fall of quartzite pebble. Natural size. Jefferson County, Idaho. 1921. #1:/Hawaii Volcanoes National Park/sht0335a ID. Stearns, H.T. 335a Hawaii Volcanoes National Park. Cross section of the lava ball, shown in photo sht00335. 1924. Plate 9-B, U.S. Geological Survey Water-Supply Paper 616. #1:/Hawaii Volcanoes National Park/sht0348a ID. Stearns, H.T. 348a Hawaii Volcanoes National Park. Driblet or spatter from a fissure eruption on Kilauea Volcano. November 18, 1924. Plate 16-B, U.S. Geological Survey Water-Supply Paper 616. #1:/Hawaii Volcanoes National Park/sht0348b ID. Stearns, H.T. 348b Hawaii Volcanoes National Park. Typical pahoehoe basalt (natural size) from lava flow near Pakanaka Hill. 1924. Plate 14-B, U.S. Geological Survey Water-Supply Paper 616. #1:/Hawaii Volcanoes National Park/sht0348d ID. Stearns, H.T. 348d Hawaii Volcanoes National Park. Numbers 1, 2, and 3 are lava stalactites from a tube near the source of the Kamooalii flow on Kilauea Volcano. Numbers 4 through 9 are various types of lava stalactites from a cave in the Maunaiki flow of 1920. Note the covering of gypsum crystals. About two-thirds natural size. November 18, 1924. Plate 17, U.S. Geological Survey Water-Supply Paper 616. #1:/Hawaii Volcanoes National Park/sht0348e ID. Stearns, H.T. 348e Hawaii Volcanoes National Park. Lava stalagmites from a tube near the source of the Kamaooalii flow on Kilauea Volcano. November 18, 1924. Plate 18, U.S. Geological Survey Water-Supply Paper 616. #1:/Hawaii Volcanoes National Park/sht0348f ID. Stearns, H.T. 348f Hawaii Volcanoes National Park. Rotational bomb (natural size) with an "ear" on each end, from a driblet cone near the Kamakaia Hills. 1924. Plate 19-A, U.S. Geological Survey Water-Supply Paper 616. #1:/Hawaii Volcanoes National Park/sht0348g ID. Stearns, H.T. 348g Hawaii Volcanoes National Park. Ribbon bombs from the same cone as the bomb shown in photo sht0348f. 1924. Plate 19-B, U.S. Geological Survey Water-Supply Paper 616. #1:/Yellowstone National Park/shw00043 ID. Smedes, H.W. 43 Yellowstone National Park, Wyoming. Vent facies autoclastic flow breccias of the Wapiti Formation along the northeast ridge of Pollux Peak. 1969. Figure 12, U.S. Geological Survey Professional Paper 729-C. #1:/Yellowstone National Park/shw00044 ID. Smedes, H.W. 44 Yellowstone National Park, Wyoming. Vent facies autoclastic flow breccia of the Wapiti Formation along the ridge south of South Cache Creek near the east boundary of the park. 1969. Figure 13, U.S. Geological Survey Professional Paper 729-C. #1:/Yellowstone National Park/shw00045 ID. Smedes, H.W. 45 Yellowstone National Park, Wyoming. Well-bedded alluvial facies volcanic breccias, conglomerates, sandstones, and air-fall tuff of the Lamar River Formation in Fossil Forest along the northeast side of Specimen Ridge. 1969. Figure 11, U.S. Geological Survey Professional Paper 729-C. #1:/Yellowstone National Park/shw00047 ID. Smedes, H.W. 47 Yellowstone National Park, Wyoming. Thin-bedded fine-grained alluvial facies volcanic sandstone, siltstone, and air-fall tuff of the Sepulcher Formation along Quartz Creek on the west side of Specimen Ridge. 1969. Figure 10, U.S. Geological Survey Professional Paper 729-C. #1:/Schlocker Collection/sj000025 ID. Schlocker, J. 25 Chevron folds in radiolarian chert of the Franciscan Formation 2 miles northwest of Golden Gate Bridge, Marin Peninsula. Marin County, California.n.d. Figure 28 in U.S. Geological Survey. Professional paper 782. 1974. #1:/Spurr J.E. Collection-Aspen Contact Mine/sje00013 ID. Spurr, J.E. 13 Aspen Contact Mine, Lenado. Pitkin County, Colorado. 1908. #1:/Spurr J.E. Collection-Leadville Mine/sje0013a ID. Spurr, J.E. 13a 1/2:Leadville Mine, Lenado. Pitkin County, Colorado. 1908. #1:/Hebgen Lake, Montana, Earthquake August 1959/sjr00001 ID. Stacy, J.R. 1ct Hebgen Lake, Montana, Earthquake August 1959. Red Canyon fault scrap near Red Canyon Creek. A 19-foot displacement was measured. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/sjr00003 ID. Stacy, J.R. 3ct Hebgen Lake, Montana, Earthquake August 1959. Gap formed along the Hebgen fault scarp. In most places the debris that was cut and offset by the fault collapsed and closed this cap; but loca11y, as shown here, the gap remained open wide enough to accommodate a man. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/sjr00007 ID. Stacy, J.R. 7ct Hebgen Lake, Montana, Earthquake August 1959. Madison Canyon slide with Earthquake Lake in the background. Hebgen fault crosses the dark forested spur near the head of the lake. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/sjr00009 ID. Stacy, J.R. 9ct Hebgen Lake, Montana, Earthquake August 1959. Sand volcano at Parade Rest Ranch. At the time of the earthquake, small fractures opened in the ground, and water and sand spewed out. During the earthquake, the tremors compacted the sand and gravel fill, and ground water which occupied the pores and interstices was put under great pressure. As cracks formed in the sand and gravel, normal-to-earthquake wave motion caused repeated compression and expansion. Water and sand were forced out through the cracks. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/sjr00010 ID. Stacy, J.R. 10ct Hebgen Lake, Montana, Earthquake August 1959. Fence compressed by a component of the downhill motion. August 1959 #1:/Hebgen Lake, Montana, Earthquake August 1959/sjr00020 ID. Stacy, J.R. 20ct Hebgen Lake, Montana, Earthquake August 1959. Madison slide. The light gray area in the lower left corner is part of the mountain crest. Rocks from the mountain top dropped about 1,300 feet and reached a speed of about 100 miles an hour when they struck the bottom of the valley. The slide rode across the valley and up the opposite valley wa11. The leading edge of the slide shows here as the white ridge of dolomite boulders. Part of Earthquake Lake on the right. View is northeastward. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/sjr00028 ID. Stacy, J.R. 28ct Hebgen Lake, Montana, Earthquake August 1959. Hebgen Lake fault scarp. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/sjr00029 ID. Stacy, J.R. 29ct Hebgen Lake, Montana, Earthquake August 1959. Landslide-broken road at Hebgen Lake. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/sjr00031 ID. Stacy, J.R. 31ct Hebgen Lake, Montana, Earthquake August 1959. Landslide into Hebgen Lake. August 1959. #1:/Hebgen Lake Earthquake/sjr00056 ID. Stacy, J.R. 56 Front of Culligan house showing toppled chimmey. Gallatin County. Montana, August 1959. Hebgen Lake Earthquake. #1:/Hebgen Lake, Montana, Earthquake August 1959/sjr00057 ID. Stacy, J.R. 57 Hebgen Lake, Montana, Earthquake August 1959. Subsidiary fracture cutting through hanging wall. Gravity graben fault at left of house. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/sjr00060 ID. Stacy, J.R. 60 Hebgen Lake, Montana, Earthquake August 1959. Damage to Blarneystone Ranch. The main group of buildings is on the downdropped block. View is from the top of the fault scarp. 1959. Figure 6-B, U.S. Geological Survey Professional Paper 435-B. #1:/Hebgen Lake, Montana, Earthquake August 1959/sjr00061 ID. Stacy, J.R. 61 Hebgen Lake, Montana, Earthquake August 1959. Collapsed storage shed on the north wall of Culligan Ranch. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/sjr00067 ID. Stacy, J.R. 67 Hebgen Lake, Montana, Earthquake August 1959. Collapsed culvert across Grayling Creek at Blarneystone Ranch. August 19, 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/sjr00068 ID. Stacy, J.R. 68 Hebgen Lake, Montana, Earthquake August 1959. Trace of Red Canyon fault near Blarneystone Ranch. Note the vertical rake of the slickensides on the fault. August 1959, #1:/Hebgen Lake, Montana, Earthquake August 1959/sjr00076 ID. Stacy, J.R. 76 Hebgen Lake, Montana, Earthquake August 1959. Fence compressed by a component of the downhill motion.W.B. Hamilton and R.E. Wallace on the left. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/sjr00077 ID. Stacy, J.R. 77 Hebgen Lake, Montana, Earthquake August 1959. Fence along the south side of State Route 499 near Corey Spring, offset and compressed by hillside slump. The shovel at lower right indicates the location of underthrust fault in the alluvium. August 1959. Figure 78, U.S. Geological Survey Professional Paper 435-K. #1:/Hebgen Lake, Montana, Earthquake August 1959/sjr00096 ID. Stacy, J.R. 96 Hebgen Lake, Montana, Earthquake August 1959. Displaced pavement and fence along State Route 499 near Corey Spring. Man is standing on the crest of a fold in the pavement. August 1959. Figure 77, U.S. Geological Survey Professional Paper 435-K. #1:/Hebgen Lake, Montana, Earthquake August 1959/sjr00097 ID. Stacy, J.R. 97 Hebgen Lake, Montana, Earthquake August 1959. Damage to bridges in the epicentral area. Buckling of the floor and separation of the concrete guardrail on the bridge crossing Grayling Creek. Figure 3-A, U.S. Geological Survey Professional Paper 435-B. #1:/Hebgen Lake, Montana, Earthquake August 1959/sjr00098 ID. Stacy, J.R. 98 Hebgen Lake, Montana, Earthquake August 1959. Separation of the guardrail on the bridge over Grayling Creek. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/sjr00100 ID. Stacy, J.R. 100 Hebgen Lake, Montana, Earthquake August 1959. Red Canyon fault scarp east of Blarneystone Ranch. Jeep stands on the road which is on the footwall. August 19 #1:/Hebgen Lake, Montana, Earthquake August 1959/sjr00104 ID. Stacy, J.R. 104 Hebgen Lake, Montana, Earthquake August 1959. Easternmost landslide cutting Highway 287. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/sjr00135 ID. Stacy, J.R. 135 Hebgen Lake, Montana, Earthquake August 1959. Cabins at Hilgard Lodge lifted by seiche and dropped askewed. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/sjr00136 ID. Stacy, J.R. 136 Hebgen Lake, Montana, Earthquake August 1959. Cabins at Hilgard Lodge lifted by seiche and dropped askewed. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/sjr00147 ID. Stacy, J.R. 147 Hebgen Lake, Montana, Earthquake August 1959. Slower part of the slide mass strewn with the remains of heavy forest cover. Later rock streams in the foreground. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/sjr00177 ID. Stacy, J.R. 177 Hebgen Lake, Montana, Earthquake August 1959. Madison Canyon slide and scar from Earthquake Lake. Madison Valley in the background. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/sjr00181 ID. Stacy, J.R. 181 Hebgen Lake, Montana, Earthquake August 1959. Hebgen Dam spillway. Note curve in the concrete core of the dam. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/sjr00182 ID. Stacy, J.R. 182 Hebgen Lake, Montana, Earthquake August 1959. Hebgen Dam spillway. Note curve in the concrete core of the dam. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/sjr00183 ID. Stacy, J.R. 183 Hebgen Lake, Montana, Earthquake August 1959. Hebgen Dam spillway. Note curve in the concrete core of the dam. A 3-foot separation of the wing wall is due to westward movement of the embankment past the core wall. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/sjr00184 ID. Stacy, J.R. 184 Hebgen Lake, Montana, Earthquake August 1959. Hebgen Dam spillway. Note curve in the concrete core of the dam. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/sjr00196 ID. Stacy, J.R. 196 Hebgen Lake, Montana, Earthquake August 1959. Piled up debris, floating houses, and submerged trees near the head of Earthquake Lake. August 1059. #1:/Hebgen Lake, Montana, Earthquake August 1959/sjr00197 ID. Stacy, J.R. 197 Hebgen Lake, Montana, Earthquake August 1959. Hebgen Dam spillway. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/sjr00198 ID. Stacy, J.R. 198 Hebgen Lake, Montana, Earthquake August 1959. Hebgen Dam spillway. Damage by the massive land slump was increased by flood water during the earthquake. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/sjr00203 ID. Stacy, J.R. 203 Hebgen Lake, Montana, Earthquake August 1959. Hilgard Lodge. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/sjr00216 ID. Stacy, J.R. 216 Hebgen Lake, Montana, Earthquake August 1959. Madison Canyon slide with Earthquake Lake in the background. Hebgen fault crosses the dark forested spur near the head of the lake. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/sjr00295 ID. Stacy, J.R. 295 Hebgen Lake, Montana, Earthquake August 1959. Madison Canyon slide. Early construction work and the lower end of Earthquake Lake. View is north from the lower part of the scar. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/sjr00306 ID. Stacy, J.R. 306 Hebgen Lake, Montana, Earthquake August 1959. Madison Canyon Slide. The top is northwest. Photo courtesy of U.S. Forest Service, August 1959. Figure 58, U.S. Geological Survey Professional Paper 435-K. #1:/Colorado National Monument/sjr00521 ID. Stacy, J.R. 521 Colorado National Monument, Colorado. Cold Shivers Point. September 1963. #1:/Colorado National Monument/sjr00525 ID. Stacy, J.R. 525 Colorado National Monument, Colorado. Independence Monument, looking north down the north entrance of Monument Canyon from Grand View Point. September 1963. #1:/Colorado National Monument/sjr00526 ID. Stacy, J.R. 526 Colorado National Monument, Colorado. Independence Monument. September 1963. #1:/Colorado National Monument/sjr00529 ID. Stacy, J.R. 529 Colorado National Monument, Colorado. Petroglyphs on face of Wingate Sandstone near the mouth of the east entrance. September 1963. #1:/Colorado National Monument/sjr00530 ID. Stacy, J.R. 530 Colorado National Monument, Colorado. Balanced Rock in Fruita Canyon. September 1963. #1:/Colorado National Monument/sjr00531 ID. Stacy, J.R. 531 Colorado National Monument, Colorado. The Coke Ovens. September 1963. #1:/Colorado National Monument/sjr00533 ID. Stacy, J.R. 533 Colorado National Monument, Colorado. Northeast from Grand View Point. September 1963. #1:/Capitol Reef National Monument/sjr00535 ID. Stacy, J.R. 535 Capitol Reef National Monument, Utah. West side of Capitol Reef, viewed from just west of Danish Hill, looking northeast toward a break in the reef made by the Fremont River. Geologic units include: Moenkopi Formation as dark, evenly bedded rocks in the lower part; Chinle Formation as light-colored slopes largely covered with large blocks; Wingate Sandstone as the steep, smooth cliff 320 to 350 feet high; Kayenta Formation as the more irregular and broken cliff forming the skyline on the left; and Navajo Sandstone as the white pinnacled cap in the center background. April 1964. Photos sjr00535, sjr00537, and sjr00538 form a panorama. #1:/Stacy J.R. Collection-Capitol Reef National Monument/sjr00536 ID. Stacy, J.R. 536 Form a panorama of west side of Capitol Reef taken from just west of Danish Hill. Looking northeast toward break in reef made by Fremont River. Geologic units include Moenkopi Formation as dark evenly bedded rocks in lower part, Chinle Formation as light colored slopes largely covered with large blocks, Wingate Sandstone as steep smooth cliff, Kayenta Formation as more irregular and broken cliff forming skyline to left of photo, and Navajo Sandstone as white pinnacled cap in center background Cliff of Wingate is 320 to 350 feet high. Capitol Reef National Monument, Wayne County, Utah. April 1964. #1:/Capitol Reef National Monument/sjr00537 ID. Stacy, J.R. 537 Capitol Reef National Monument, Utah. West side of Capitol Reef, viewed from just west of Danish Hill, looking northeast toward a break in the reef made by the Fremont River. Geologic units include: Moenkopi Formation as dark, evenly bedded rocks in the lower part; Chinle Formation as light-colored slopes largely covered with large blocks; Wingate Sandstone as the steep, smooth cliff 320 to 350 feet high; Kayenta Formation as the more irregular and broken cliff forming the skyline on the left; and Navajo Sandstone as the white pinnacled cap in the center background. April 1964. Photos sjr00535, sjr00537, and sjr00538 form a panorama. #1:/Capitol Reef National Monument/sjr00538 ID. Stacy, J.R. 538 Capitol Reef National Monument, Utah. West side of Capitol Reef, viewed from just west of Danish Hill, looking northeast toward a break in the reef made by the Fremont River. Geologic units include: Moenkopi Formation as dark, evenly bedded rocks in the lower part; Chinle Formation as light-colored slopes largely covered with large blocks; Wingate Sandstone as the steep, smooth cliff 320 to 350 feet high; Kayenta Formation as the more irregular and broken cliff forming the skyline on the left; and Navajo Sandstone as the white pinnacled cap in the center background. April 1964. Photos sjr00535, sjr00537, and sjr00538 form a panorama. #1:/Capitol Reef National Monument/sjr00540 ID. Stacy, J.R. 540 Capitol Reef National Monument, Utah. Egyptian Temple. Dark, evenly bedded mudstone to very fine-grained sandstone of the Meonkopi Formation, capped by lighter sandstone of the Shinarump Member of the Chinle Formation. April 1964. #1:/Capitol Reef National Monument/sjr00541 ID. Stacy, J.R. 541 Capitol Reef National Monument, Utah. Cliff in the background has Chinle Formation at the base, a smooth cliff of Wingate Sandstone, ledgy slopes of Kayenta Formation, and capping white domes and pinnacles of Navajo Sandstone. Relief is about 1,300 feet. Rubble-covered slopes in the right foreground are Chinle Formation. View is northeast from just south of Fruita. April 1964. #1:/Capitol Reef National Monument/sjr00542 ID. Stacy, J.R. 542 Capitol Reef National Monument, Utah. North toward Meek's Mesa in the west part of the monument. Moenkopi Formation in the foreground; Shinarump Member of Chine Formation forms the white ledge through the center; Chinle Formation above; Wingate Sandstone forms the cliff; and a thin cap of Kayenta Formation in places. April 1964. #1:/Capitol Reef National Monument/sjr00543 ID. Stacy, J.R. 543 Capitol Reef National Monument, Utah. Capitol Reef, viewed from the southwest. Sandstone and siltstone of the Moenkopi Formation in the foreground. The main cliff is Wingate Sandstone. April 1964. #1:/Capitol Reef National Monument/sjr00544 ID. Stacy, J.R. 544 Capitol Reef National Monument, Utah. Capitol Reef, viewed from the southwest. Sandstone and siltstone of the Moenkopi Formation in the foreground. The main cliff is Wingate Sandstone. April 1964. #1:/Capitol Reef National Monument/sjr00546 ID. Stacy, J.R. 546 Capitol Reef National Monument, Utah. South side of the Fremont River just below Fruita. Wingate Sandstone and ledgy cap of Kayenta Formation dipping east as part of Waterpocket Fold. April 1964. #1:/Capitol Reef National Monument/sjr00548 ID. Stacy, J.R. 548 Capitol Reef National Monument, Utah. East-dipping beds of Waterpocket Fold on the south side of the Fremont River just east of Fruita. Evenly bedded mudstone and siltstone of the Chinle Formation in the lower right. Cross- bedded sandstone of the Wingate Sandstone forms the cliff. Lenticular sandstone of the Kayenta Formation forms the ledgy cap. The bench about half-way up the cliff is covered with lava boulders. April 1964. #1:/Capitol Reef National Monument/sjr00549 ID. Stacy, J.R. 549 Capitol Reef National Monument, Utah. Cliff on Wingate Sandstone, showing cross-bedding on the north side of the Fremont River just east of Fruita. April 1964. #1:/Capitol Reef National Monument/sjr00550 ID. Stacy, J.R. 550 Capitol Reef National Monument, Utah. Petroglyphs on a wall of Wingate Sandstone on the north side of the Fremont River just east of Fruita. The base of the cliff is shown in photo sjr00549. April 1964. #1:/Capitol Reef National Monument/sjr00551 ID. Stacy, J.R. 551 Capitol Reef National Monument, Utah. Petroglyphs on a wall of Wingate Sandstone on the north side of the Fremont River just east of Fruita. The base of the cliff is shown in photo sjr00549. April 1964. #1:/Capitol Reef National Monument/sjr00552 ID. Stacy, J.R. 552 Capitol Reef National Monument, Utah. Petroglyphs on a wall of Wingate Sandstone on the north side of the Fremont River just east of Fruita. The base of the cliff is shown in photo sjr00549. April 1964. #1:/Capitol Reef National Monument/sjr00553 ID. Stacy, J.R. 553 Capitol Reef National Monument, Utah. Petroglyphs on a wall of Wingate Sandstone on the north side of the Fremont River just east of Fruita. The base of the cliff is shown in photo sjr00549. April 1964. #1:/Capitol Reef National Monument/sjr00554 ID. Stacy, J.R. 554 Capitol Reef National Monument, Utah. Looking north at Mummy Cliff. Evenly bedded Moenkopi Formation forms the lower part of the cliff, overlain by mudstone to sandstone and some lenticular limestone of the Chinle Formation. April 1964. #1:/Capitol Reef National Monument/sjr00555 ID. Stacy, J.R. 555 Capitol Reef National Monument, Utah. Joint in sandstone of the Moenkopi Formation. April 1964. #1:/Capitol Reef National Monument/sjr00556 ID. Stacy, J.R. 556 Capitol Reef National Monument, Utah. Joint-controlled weathering of Navajo Sandstone. View is north from the south side of the Fremont River. April 1964. #1:/Capitol Reef National Monument/sjr00557 ID. Stacy, J.R. 557 Capitol Reef National Monument, Utah. Ledgy slopes on Kayenta Formation overlain by more massive Navajo Sandstone. Weathering of Navajo is largely controlled by joints. View is north above the Fremont River east of Fruita. April 1964. #1:/Capitol Reef National Monument/sjr00558 ID. Stacy, J.R. 558 Capitol Reef National Monument, Utah. Kayenta Formation along Cohab Canyon. Black cobbles and boulders are lava; similar boulders cover benches and slopes locally, particularly near the Fremont River. These boulders have had a long history of movement by streams and by gravity down the slopes toward the east. The nearest present outcrops of similar lava are on Boulder Mountain about 1(?) mile to the southeast and about 5,000 feet higher. April 1964. #1:/Capitol Reef National Monument/sjr00559 ID. Stacy, J.R. 559 Capitol Reef National Monument, Utah. Joints in the Sinbad Member of the Moenkopi Formation along Sulphur Creek west of Fruita. April 1964. #1:/Death Valley National Park/sjr00563 ID. Stacy, J.R. 563 Death Valley National Park, California. Differences in desiccation cracks caused by differences in the salts along Salt Creek opposite Furnace Creek fan. In the middle (white area), a pool of water dried leaving a thin white crust of salt. Desiccation cracks here are 1 to 2 feet apart, and the cracks gape as much as an inch. Along each side of the wash, the ground is still wet and is without cracks. All the belts are silty clay, but the center has the most salts (5 percent by volume) and they form a mesh of crystals (glauberite- thenardite-halite) up to 3 millimeters in diameter. The bordering belt, with more closely spaced cracks, has 4 percent salts, and the crystals are 1 to 2 millimeters in diameter. The wet ground without cracks has less than 3.5 percent salts, and the crystals are half a millimeter or less. Circa 1960. Figure 54, U.S. Geological Survey Professional Paper 494-B. #1:/Death Valley National Park/sjr00565 ID. Stacy, J.R. 565 Death Valley National Park, California. Polygonal pattern in salt crust on the flood plain northeast of Cottonball Flat. The veins of salt that developed in the cracks are high enough to form ramparts that pond water within the polygons. A layer of salt extends across the surface between the ramparts. January 1957. #1:/Death Valley National Park/sjr00570 ID. Stacy, J.R. 570 Death Valley National Park, California. Polygonal patterns in gypsiferous ground at the shoreline of the Holocene lake, just north of the road crossing the valley at the Devils Golf Course. The polygons are due to cracks in a layer of rock salt 6 to 8 inches below the surface; the salt is at least 3 inches thick and perhaps much more. It formed at the capillary fringe above the water table that extended into the hill at the time of the Holocene lake. At the surface, the cracks in the salt are marked by troughs in which stones have been collected. Circa 1960. Figure 64, U.S. Geological Survey Professional Paper 494-B. #1:/Death Valley National Park/sjr00573 ID. Stacy, J.R. 573 Death Valley National Park, California. Hillsides on the Tertiary playa beds in the Mustard Canyon area are crusted with salt 1 foot or more thick and cracked into polygonal slabs up to 10 feet in diameter. The cracks are not vertical; they are perpendicular to the slope. Circa 1960. Figure 68, U.S. Geological Survey Professional Paper 494-B. #1:/Death Valley National Park/sjr00574 ID. Stacy, J.R. 574 Death Valley National Park, California. The silt layer under desert pavement on the fans in Death Valley may contain 0.5 to 4.0 percent (by volume) of water soluble salts. The silt underlying the stones is very porous (vesicular) and cracked polygonally, apparently because there is enough wetting by dew and rain to cause the silt to swell when wet and later shrink again when dry. Circa 1960. Figure 73, U.S. Geological Survey Professional Paper 494-B. #1:/Stacy J.R. Collection/sjr00579 ID. Stacy, J.R. 579 Pegmatite dike in Precambrian gneiss in Bear Creek Canyon. Jefferson County, Colorado. October 16, 1966. On page 11 in U.S. Geological Survey. Mountains and plains: Denver's geologic setting. 1967. #1:/Fossils/sjr00581 ID. Stacy, J.R. 581 Fossils. Fossil footprint on the Dakota Sandstone in Jefferson County, Colorado. October 16, 1966. #1:/Black Canyon Of The Gunnison National Park/sjr00589 ID. Stacy, J.R. 589 Black Canyon Of The Gunnison National Park, Colorado. Black Canyon of the Gunnison River (foreground), in Precambrian rock, is 2,500 feet deep. View is northeast to the West Elk Mountains (on skyline). Uplift of the Precambrian rocks while the canyon was being eroded diverted drainage that formerly came to the Black Canyon from the West Elk Mountains. The abandoned valley has been left hanging. 1965. Figure 44, U.S. Geological Survey Professional Paper 669-C. #1:/Stacy J.R. Collection/sjr00597 ID. Stacy, J.R. 597 Crossing the Canyonlands section of the Colorado Plateau, the Colorado and Green Rivers are in deep colorful canyons in Jurassic, Triassic Permian and Pennsylvanian rocks. Looking up the Colorado River at The Loop about 6 miles above the junction of the Green River. The gorge is about 500 feet deep; the broad bench is underlain by the Permian (Cutler Formation), and no river gravels were found on it. In the distance, about 8 miles away, are the cliffs of the Triassic and Jurassic rocks, about 1,200 feet high. In early Miocene (about 25 million years ago) much or most of the canyonlands still were covered by Cretaceous shale (Mancos Shale) River deposits correlated with glacial deposits in the La Sal Mountains indicate about 500 feet of canyon deepening during quaternary time (last 2-3 million years). San Juan County, Utah. 1965. Figure 55 in U.S. Geological Survey. Professional paper 699. 1969. #1:/Death Valley National Park/sjr00620 ID. Stacy, J.R. 620 Death Valley National Park, California. Desert pavement in the foreground. View is west from the Park Village fault block. Weathering of boulders and cobbles at the surface has produced a new mantle of blocks, slabs, and flakes, forming a smooth desert pavement in which the stones are closely spaced but barely or not at all shingled. Circa 1964. Figure 50, U.S. Geological Survey Professional Paper 494-A. #1:/Yellowstone National Park/sjr00634 ID. Stacy, J.R. 634 Yellowstone National Park, Wyoming. Layered and porous nature of travertine from Opal Springs in the Mammoth Hot Springs area. 1970. Figure 48 (lower photo), U.S. Geological Survey Bulletin 1347. #1:/Yellowstone National Park/sjr00635 ID. Stacy, J.R. 635 Yellowstone National Park, Wyoming. Cut surface of rhyolite, showing the striking banding that results from the flow of viscous molten rock. The dark bands are chiefly concentrations of volcanic glass (also some cavities), and the light bands are concentrations of tiny crystals of feldspar and quartz. 1970. Figure 30 (lower photo), U.S. Geological Survey Bulletin 1347. #1:/Yellowstone National Park/sjr00636 ID. Stacy, J.R. 636 Yellowstone National Park, Wyoming. Intrusive igneous rock (diorite) from Electric Peak stock in the Gallatin Range. The rock is composed chiefly of light-colored quartz and feldspar and dark-colored iron and magnesium silicate minerals. 1970. Figure 20, U.S. Geological Survey Bulletin 1347. #1:/Yellowstone National Park/sjr00638 ID. Stacy, J.R. 638 Yellowstone National Park, Wyoming. Limestone of Mississippian age along Pebble Creek at the Pebble Creek campground, showing some of the fossils and their casts. Most of the fossils are brachiopods that lived on the ocean floors approximately 300 million years ago. 1970. Figure 12-B, U.S. Geological Survey Bulletin 1347. #1:/Yellowstone National Park/sjr00639 ID. Stacy, J.R. 639 Yellowstone National Park, Wyoming. Outcrop of glassy rhyolite lava along the road between Canyon Village and Norris Junction. The conspicuous lines in the face of the rock outline different layers produced by lava flowage. Glassy fracture and light-colored crystals are quartz (blocky) and feldspar (tabular). The feldspar crystals are aligned parallel to the direction of flow. 1970. See also photos sjr00641 and sjr00699. #1:/Yellowstone National Park/sjr00640 ID. Stacy, J.R. 640 Yellowstone National Park, Wyoming. Yellowstone tuff at Golden Gate. The rocks consist of layered ash-flow tuff. Specimen on the left shows typical characteristics of the tuff in most outcrop areas. Of the light-colored materials, the larger masses are compressed pumice fragments and the smaller masses are pumice, feldspar, and quartz. The dark grains are chiefly magnetite and pyroxene. Specimen on the right is of a coarse-grained specimen from Tuff Cliff. The large fragments are mostly crystallized pumice, and the light- colored matrix is composed of very fine particles of volcanic ash and dust. 1970. Figure 25 (lower photo), U.S. Geological Survey Bulletin 1347. #1:/Yellowstone National Park/sjr00641 ID. Stacy, J.R. 641 Yellowstone National Park, Wyoming. Outcrop of glassy rhyolite lava along the road between Canyon Village and Norris Junction. Dark parts of the rock are volcanic glass. 1970. Figure 32-A (lower photo), U.S. Geological Survey Bulletin 1347. See also photos sjr00639 and sjr00699. #1:/Yellowstone National Park/sjr00642 ID. Stacy, J.R. 642 Yellowstone National Park, Wyoming. Mount Everts, viewed from the southwest from south of Mammoth Hot Springs. The mountain, about 1,500 feet above the plain, is formed by gently tilted sedimentary rocks of Cretaceous age, chiefly sandstone and shale of the Frontier Formation, Cody Formation, and Everts Formation. The conspicuous rim rock at the top of the mountain to the right is composed of Yellowstone Tuff. When the tuff was deposited by explosive eruptions from the south, there was no valley along the edge of the mountain. 1970. Photos sjr00642, sjr00643, and sjf00644 form a panorama. #1:/Yellowstone National Park/sjr00643 ID. Stacy, J.R. 643 Yellowstone National Park, Wyoming. Mount Everts, viewed from the southwest from south of Mammoth Hot Springs. The mountain, about 1,500 feet above the plain, is formed by gently tilted sedimentary rocks of Cretaceous age, chiefly sandstone and shale of the Frontier Formation, Cody Formation, and Everts Formation. The conspicuous rim rock at the top of the mountain to the right is composed of Yellowstone Tuff. When the tuff was deposited by explosive eruptions from the south, there was no valley along the edge of the mountain. 1970. Photos sjr00642, sjr00643, and sjf00644 form a panorama. #1:/Yellowstone National Park/sjr00644 ID. Stacy, J.R. 644 Yellowstone National Park, Wyoming. Mount Everts, viewed from the southwest from south of Mammoth Hot Springs. The mountain, about 1,500 feet above the plain, is formed by gently tilted sedimentary rocks of Cretaceous age, chiefly sandstone and shale of the Frontier Formation, Cody Formation, and Everts Formation. The conspicuous rim rock at the top of the mountain to the right is composed of Yellowstone Tuff. When the tuff was deposited by explosive eruptions from the south, there was no valley along the edge of the mountain. 1970. Photos sjr00642, sjr00643, and sjf00644 form a panorama. #1:/Yellowstone National Park/sjr00645 ID. Stacy, J.R. 645 Yellowstone National Park, Wyoming. Brecciated rhyolite lava flows along the Firehole Canyon drive. As a lava flow moves outward from its center of eruption, a chilled crust develops along its upper surface and outer edges because of the cooler temperatures in those parts of the flow. Continued movement of the still molten rock in the interior of the flow causes this crust to break up (brecciate) into angular blocks. The blocks are then tumbled along until the whole mass finally solidifies. 1970. Photos sjr00645 and sjr00646 form a panorama. #1:/Yellowstone National Park/sjr00646 ID. Stacy, J.R. 646 Yellowstone National Park, Wyoming. Brecciated rhyolite lava flows along the Firehole Canyon drive. As a lava flow moves outward from its center of eruption, a chilled crust develops along its upper surface and outer edges because of the cooler temperatures in those parts of the flow. Continued movement of the still molten rock in the interior of the flow causes this crust to break up (brecciate) into angular blocks. The blocks are then tumbled along until the whole mass finally solidifies. 1970. Photos sjr00645 and sjr00646 form a panorama. #1:/Yellowstone National Park/sjr00647 ID. Stacy, J.R. 647 Yellowstone National Park, Wyoming. Brecciated rhyolite lava flows along the Firehole Canyon drive. As a lava flow moves outward from its center of eruption, a chilled crust develops along its upper surface and outer edges because of the cooler temperatures in those parts of the flow. Continued movement of the still molten rock in the interior of the flow causes this crust to break up (brecciate) into angular blocks. The blacks are then tumbled along until the whole mass finally solidifies. 1970. Figure 31, U.S. Geological Survey Bulletin 1347. #1:/Yellowstone National Park/sjr00648 ID. Stacy, J.R. 648 Yellowstone National Park, Wyoming. Seismic Geyser in Upper Geyser Basin, showing rock rubble blown out during an explosive thermal eruption. Note the trees that have been killed by the heat and eruptive activity. According to George D. Marler of the U.S. National Park Service, this geyser developed from a crack caused by the Hebgen Lake, Montana, earthquake of August 17, 1959. 1970. Figure 51, U.S. Geological Survey Bulletin 1347. #1:/Yellowstone National Park/sjr00649 ID. Stacy, J.R. 649 Yellowstone National Park, Wyoming. Seismic Geyser in Upper Geyser Basin, showing rock rubble blown out during an explosive thermal eruption. Note the trees that have been killed by the heat and eruptive activity. According to George D. Marler of the U.S. National Park Service, this geyser developed from a crack caused by the Hebgen Lake, Montana, earthquake of August 17, 1959. 1970. #1:/Yellowstone National Park/sjr00653 ID. Stacy, J.R. 653 Yellowstone National Park, Wyoming. Glaciated terrain along the Northeast Entrance road. The boulders, many of which measure 10 feet across or more, were carried into the area by ice flowing down Slough Creek from the mountains north of the park during the Pinedale Glaciation. As the glaciers melted, the boulders were left stranded in hummocky, morainal deposits. Shallow depressions in the irregular topography are now commonly filled by small ponds. 1970. #1:/Yellowstone National Park/sjr00655 ID. Stacy, J.R. 655 Yellowstone National Park, Wyoming. Yellowstone Tuff at Golden Gate. The rocks consist of layered ash-flow tuff. The height of the cliff is about 200 feet. 1970. #1:/Yellowstone National Park/sjr00656 ID. Stacy, J.R. 656 Yellowstone National Park, Wyoming. Basalt spectacularly exposed in the east wall of the Grand Canyon of the Yellowstone at The Narrows near Tower Falls. Pronounced columnar jointing of the basalt is seen at close range at the edge of the road on the (opposite west) side of the canyon. 1970. #1:/Yellowstone National Park/sjr00657 ID. Stacy, J.R. 657 Yellowstone National Park, Wyoming. Basalt spectacularly exposed in the east wall of the Grand Canyon of the Yellowstone at The Narrows near Tower Falls. Pronounced columnar jointing of the basalt is seen at close range at the edge of the road on the opposite (west) side of the canyon. 1970. Figure 33 (lower photo), U.S. Geological Survey Bulletin 1347. #1:/Yellowstone National Park/sjr00659 ID. Stacy, J.R. 659 Yellowstone National Park, Wyoming. Massive beds of breccia of the Absaroka volcanic rocks along the road north of Dunraven Pass. This breccia formed part of a steep-sided volcanic cone, of which Mount Washburn is a remnant. The most common colors are medium to fairly dark shades of brown, red, purple, and gray. 1970. Figure 17 (upper photo), U.S. Geological Survey Bulletin 1347. #1:/Yellowstone National Park/sjr00660 ID. Stacy, J.R. 660 Yellowstone National Park, Wyoming. Limestone of Mississippian age along Pebble Creek at the Pebble Creek campground. 1970. Figure 12 (upper photo), U.S. Geological Survey Bulletin 1347. #1:/Yellowstone National Park/sjr00661 ID. Stacy, J.R. 661 Yellowstone National Park, Wyoming. Limestone of Mississippian age along Pebble Creek at the Pebble Creek campground. 1970. #1:/Yellowstone National Park/sjr00663 ID. Stacy, J.R. 663 Yellowstone National Park, Wyoming. Thick rhyolite lava flow along the west bank of Firehole River. 1970. Figure 30 (upper photo), U.S. Geological Survey Bulletin 1347. #1:/Yellowstone National Park/sjr00665 ID. Stacy, J.R. 665 Yellowstone National Park, Wyoming. Bunsen Peak, a roughly circular body of intrusive igneous rock, is the eroded remnant of either the "neck" of an Absaroka volcano or a small stock that solidified directly beneath a volcano. The peak rises approximately 1,200 feet above a flat plain (foreground) that is covered by flows of younger basalt. The Yellowstone Tuff, formed by volcanic ash and dust exploded from the central Yellowstone region to the south, underlies the basalt. When erupting, the volcanic debris (as well as the basalt lava) flowed around the high-standing peak. 1970. Figure 21, U.S. Geological Survey Bulletin 1347. #1:/Yellowstone National Park/sjr00666 ID. Stacy, J.R. 666 Yellowstone National Park, Wyoming. Lamar River. Downstream (west) along the Lamar River in Lamar Canyon. The rocks along the riverbanks are coarsely banded Precambrian gneisses more than 2.5 billion years old, some of the oldest rocks in the park. 1970. Figure 7 (upper photo), U.S. Geological Survey Bulletin 1347. #1:/Yellowstone National Park/sjr00667 ID. Stacy, J.R. 667 Yellowstone National Park, Wyoming. Two ledges of basalt spectacularly exposed in the east wall of the Grand Canyon of the Yellowstone at The Narrows near Tower Falls. The light-colored rocks between the basalt flows are ancient stream gravels deposited about 1.5 million years ago, when the channel of the Yellowstone River was farther east and not as deep as it is today. The hill is capped by lake sediments, sand and gravel, deposited when the Yellowstone River was blocked by a glacial dam farther downstream (to the left). The brown rocks at the base of the cliff are Absaroka andesite breccias. 1970. Figure 33 (upper photo), U.S. Geological Survey Bulletin 1347. #1:/Yellowstone National Park/sjr00668 ID. Stacy, J.R. 668 Yellowstone National Park, Wyoming. Flat-lying beds of fine sand, silt, and clay near the mouth of Trout Creek in Hayden Valley. These beds were deposited in a glacially dammed lake that covered part of the Hayden Valley when the Pinedale glaciers were melting. The height of the stream bank is about 40 feet. 1970. Figure 39, U.S. Geological Survey Bulletin 1347. #1:/Yellowstone National Park/sjr00676 ID. Stacy, J.R. 676 Yellowstone National Park, Wyoming. Terraces of travertine at Opal Springs in the Mammoth Hot Springs area. 1970. Figure 48 (upper photo), U.S. Geological Survey Bulletin 1347. #1:/Yellowstone National Park/sjr00678 ID. Stacy, J.R. 678 Yellowstone National Park, Wyoming. Mound of sinter at Castle Geyser in Upper Geyser Basin. Lower part of the mound has well-defined layers probably deposited by normal hot springs. The upper, irregular part resulted from the vigorous eruptions characteristic of geysers and marks a change in the local hot spring activity. 1970. #1:/Yellowstone National Park/sjr00680 ID. Stacy, J.R. 680 Yellowstone National Park, Wyoming. Grotto Geyser in Upper Geyser Basin in eruption. 1970. #1:/Yellowstone National Park/sjr00681 ID. Stacy, J.R. 681 Yellowstone National Park, Wyoming. Seismic Geyser in Upper Geyser Basin during an explosive thermal eruption. Note the trees that have been killed by the heat and eruptive activity. According to G.D. Marler of the U.S. National Park Service, this geyser developed from a crack caused by the Hebgen Lake, Montana, earthquake of August 17, 1959. 1970. #1:/Yellowstone National Park/sjr00682 ID. Stacy, J.R. 682 Yellowstone National Park, Wyoming. Seismic Geyser in Upper Geyser Basin during an explosive thermal eruption. Note the trees that have been killed by the heat and eruptive activity. According to G.D. Marler of the U.S. National Park Service, this geyser developed from a crack caused by the Hebgen Lake, Montana, earthquake of August 17, 1959. 1970. #1:/Yellowstone National Park/sjr00683 ID. Stacy, J.R. 683 Yellowstone National Park, Wyoming. Old Faithful Geyser in Upper Geyser Basin in eruption. 1970. #1:/Yellowstone National Park/sjr00695 ID. Stacy, J.R. 695 Yellowstone National Park, Wyoming. Mississippian age limestone with a highly fossiliferous layer along Pebble Creek at the Pebble Creek campground. 1970. #1:/Yellowstone National Park/sjr00696 ID. Stacy, J.R. 696 Yellowstone National Park, Wyoming. Rocks along the Lamar River banks are coarsely banded Precambrian gneisses more than 2.5 billion years old. These are some of the oldest rocks in the park. Note the coarse banding and texture of the gneiss. Minerals include quartz, feldspar, and biotite (black mica). 1970. #1:/Yellowstone National Park/sjr00698 ID. Stacy, J.R. 698 Yellowstone National Park, Wyoming. Massive beds of breccia of the Absaroka volcanic rocks along the road north of Dunraven Pass. This breccia formed part of a steep-sided volcanic cone, of which Mount Washburn is a remnant. Note the very coarse character of the breccia, with large rock fragments imbedded in fine ash, dust and sand. Nearly all the rocks are of andesitic composition, consisting chiefly of feldspar and pyroxene. The most common colors are medium to fairly dark shades of brown, red, purple, and gray. 1970. Figure 17 (lower photo), U.S. Geological Survey Bulletin 1347. #1:/Yellowstone National Park/sjr00699 ID. Stacy, J.R. 699 Yellowstone National Park, Wyoming. Outcrop of glassy rhyolite lava along the road between Canyon Village and Norris Junction. The conspicuous lines in the face of the rock outline different layers produced by lava flowage. Glassy fracture shown and light-colored crystals are quartz (blocky) and feldspar (tabular). The feldspar crystals are aligned parallel to the direction of the flow. 1970. Figure 32-B, U.S. Geological Survey Bulletin 1347. See also photos sjr00639 and sjr00641. #1:/Yellowstone National Park/sjr00701 ID. Stacy, J.R. 701 Yellowstone National Park, Wyoming. Caldera development - first of four schematic diagrams showing idealized stages in the development of the Yellowstone caldera 600,000 years ago. A large magma chamber formed deep within the earth, and the molten rock began to force its way slowly toward the surface. As it pushed upward, it arched the overlying rocks into a broad dome. The arching produced a series of concentric fractures, or a ring fracture zone, around the crest of the dome. The fractures extended downward toward the top of the magma chamber. 1970. Figure 23-A, U.S. Geological Survey Bulletin 1347. Photos sjr00701, sjr00702, sjr00703, and sjr00704 form a sequence. #1:/Yellowstone National Park/sjr00702 ID. Stacy, J.R. 702 Yellowstone National Park, Wyoming. Caldera development - third of four schematic diagrams showing idealized stages in the development of the Yellowstone caldera 600,000 years ago. The area overlying the blown-out part of the magma chamber collapsed to form a gigantic caldera. The collapse took place mostly along normal faults that developed from the fractures in the ring fracture zone. The depth of the collapse was probably several thousand feet. 1970. Figure 23-C, U.S. Geological Survey Bulletin 1347. Photos sjr00701, sjr00702, sjr00703, and sjr00704 form a sequence. #1:/Yellowstone National Park/sjr00703 ID. Stacy, J.R. 703 Yellowstone National Park, Wyoming. Caldera development - fourth of four schematic diagrams showing idealized stages in the development of the Yellowstone caldera 600,000 years ago. Renewed rise of molten rock domed the caldera floor above the magma chamber. A series of rhyolite lava flows poured out through fractures in the surrounding ring fracture zone and spread across the caldera floor. 1970. Figure 23-D, U.S. Geological Survey Bulletin 1347. Photos sjr00701, sjr00702, sjr00703, and sjr00704 form a sequence. #1:/Yellowstone National Park/sjr00704 ID. Stacy, J.R. 704 Yellowstone National Park, Wyoming. Caldera development - second of four schematic diagrams showing idealized stages in the development of the Yellowstone caldera 600,000 years ago. The ring fractures eventually tapped the magma chamber, the uppermost part of which contained a high proportion of dissolved gases. With the sudden release of pressure, tremendous amounts of hot gases and molten rock were erupted almost instantly. The liquid solidified into pumice, ash, and dust and it was blown out. Some of the dust and ash was blown high into the air and carried along by the wind, but much of the debris moved outward across the landscape as vast ash flows, rapidly covering thousands of square miles. 1970. Figure 23-B, U.S. Geological Survey Bulletin 1347. Photos sjr00701, sjr00702, sjr00703, and sjr00704 form a sequence. #1:/Yellowstone National Park/sjr00705 ID. Stacy, J.R. 705 Yellowstone National Park, Wyoming. Barronette Peak near the Northeast Entrance of the park. 1970. #1:/Yellowstone National Park/sjr00712 ID. Stacy, J.R. 712 Yellowstone National Park, Wyoming. Tower Falls on Tower Creek. The rocks at the brink of the falls and in the vertical cliff beneath are coarse breccias and conglomerates of the Absaroka volcanic rocks. The channel of Tower Creek has not been cut down rapidly enough to keep pace with the downcutting of the main channel of the Yellowstone River, which lies a short distance downstream from the base of the falls. 1970. Figure 40-D, U.S. Geological Survey Bulletin 1347. #1:/Yellowstone National Park/sjr00746 ID. Stacy, J.R. 746 Yellowstone National Park, Wyoming. Giant petrified tree trunks in Fossil Forest. The enclosing rocks, part of the Absaroka volcanic sequence that forms Specimen Ridge, are approximately 50 million years old. Many of the tree trunks are still upright, having been smothered and buried in their original positions by breccia, ash, and dust from nearby volcanoes. It is evident that more than one "forest" is represented in this view. Erling Dorf of Princeton University counted a total of 27 different forest layers in the rocks now exposed at Specimen Ridge. He also determined that the most common kinds of trees were sycamore, walnut, magnolia, chestnut, oak, redwood, maple, and dogwood. The nearest living relatives of many of these trees are now found in the warm temperate to subtropical forests of the southeastern and southern United States. 1970. #1:/Yellowstone National Park/sjr00749 ID. Stacy, J.R. 749 Yellowstone National Park, Wyoming. Giant boulder (glacial erratic) of Precambrian gneiss near Inspiration Point on the north rim of the Grand Canyon of the Yellowstone. The boulder, measuring 24 x 20 x 18 feet and weighing more than 500 tons, was dropped at this locality by glacial ice; it now rests on the much younger Plateau Rhyolite. The distance that the boulder was carried or pushed was at least 15 miles. 1970. Figure 34, U.S. Geological Survey Bulletin 1347. #1:/Hebgen Lake, Montana, Earthquake August 1959/sjr0209a ID. Stacy, J.R. 209a Hebgen Lake, Montana, Earthquake August 1959. Madison Canyon landslide from over Earthquake Lake, somewhat east of the drowned toe of the slide. Photo was taken after preparation of the spillway had begun. 1959. #1:/Segerstrom K. Collection-Atacama, Chile/sk000552 ID. Segerstrom, K. 552 Thrust fault and drag fold of thin-bedded limestone of the Nantoco formation about 50 m below the Gamma Member, Quebrada de Las Penas. Height of the cliff immediately underlying the fault plane is 3 to 8 m. Atacama Province, Chile.n.d. Figure 70.5 in U.S. Geological Survey. Professional paper 450-C. 1962. #1:/Segerstrom K. Collection-Atacama, Chile/sk000553 ID. Segerstrom, K. 553 Outcrop of granite that has been etched and pitted by the abrasive action of windblown sand, Llano de Caldera, Atacama Province, Chile.n.d. Figure 93.2 in U.S. Geological Survey. Professional paper 450-C. 1962. #1:/Segerstrom K. Collection-Atacama, Chile/sk000554 ID. Segerstrom, K. 554 Outcrop of granite that has been undercut by the abrasive action of windblown sand, Llano de Caldera, Atacama Province, Chile.n.d. Figure 93.3 in U.S. Geological Survey. Professional paper 450-C. 1962. #1:/Segerstrom K. Collection-Atacama, Chile/sk000555 ID. Segerstrom, K. 555 Exfoliated block of granite that has been hollowed out by abrasive action of windblown sand, Llanode Caldera. Atacama Province, Chile.n.d. Figure 93.4 in U.S. Geological Survey. Professional paper 450-C. 1962. #1:/Segerstrom K. Collection-Queretaro, Mexico/sk000662 ID. Segerstrom, K. 662 Travertine deposits on wall of canyon of the Rio Extorax, about 5 km west of Las Medias. Queretaro, Mexico. ca. 1956. #1:/Segerstrom K. Collection-Queretaro, Mexico/sk000668 ID. Segerstrom, K. 668 Boudinage and chevron folds in the El Doctor limestone, along the Rio Extorax between Bucareli and Las Medias. Queretaro, Mexico. ca. 1956. Figure 27 in U.S. Geological Survey. Bulletin 1104-B. 1961. #1:/Kaiparowits Coal Basin/ska00003 ID. Sargent, K.A. 3ct Kaiparowits Coal Basin, Utah. Landslide debris just north of Fifty-Mile Point looking west near the south end of Fifty-Mile Mountain. Landslide and debris- flow material has moved toward the viewer from near the base of the highest cliffs onto the intermediate bench of Dakota Sandstone as a sheet slide and locally has flowed down over Morrison-Entrada cliffs as a lobate debris slide. Boulders in debris slide are as large as 40 feet. Debris flow formed at lower end. 1976. Portion of figure 9, U.S. Geological Survey Bulletin 1601. #1:/Kaiparowits Coal Basin/ska00004 ID. Sargent, K.A. 4ct Kaiparowits Coal Basin, Utah. Flash flood on Twenty-five Mile Wash on Hole-in- the-Rock Road. Maximum water depth is approximately 8 feet. The rain which caused this flood fell 68 miles west (left) on Fifty-Mile Mountain. September 1977. #1:/Kaiparowits Coal Basin/ska00005 ID. Sargent, K.A. 5ct Kaiparowits Coal Basin, Utah. Petrified logs weathering from Petrified Forest Member of the Chinle Formation in the northwestern part of Circle Cliffs. Maximum log length is about 36 feet. 1979. #1:/Shiloh National Military Park/slw00581 ID. Stephenson, L.W. 581 Shiloh National Military Park, Tennessee. Pleistocene plain west of Pittsburgh Landing at the site of the Battle of Pittsburgh Landing. #1:/Wright Brothers National Memorial/slw01343 ID. Stephenson, L.W. 1343 Wright Brothers National Memorial, North Carolina. One of the group of sand dunes known as Kill Devil Hills in Dare County. This is the dune on which the Wright brothers experimented with air gliders between 1900 and 1903. Looking south from the granite monument marking the site of the first successful flight by Orville Wright in a motor-driven airplane. Vegetation is being planted on the slopes of the dune to keep it from moving farther south. September 7, 1929. #1:/Wright Brothers National Memorial/slw01344 ID. Stephenson, L.W. 1344 Wright Brothers National Memorial, North Carolina. View is from the north of Kill Devil Hills in Dare County. September 7, 1929. #1:/Wright Brothers National Memorial/slw01345 ID. Stephenson, L.W. 1345 Wright Brothers National Memorial, North Carolina. View is from the south of Kill Devil Hills in Dare County. September 7, 1929. #1:/Wright Brothers National Memorial/slw01346 ID. Stephenson, L.W. 1346 Wright Brothers National Memorial, North Carolina. Granite boulder marking the site of the first successful flight of a motor-driven airplane made by Orville Wright on December 17, 1903, near Kill Devil Hills. September 7, 1929. #1:/Staatz M.H. Collection/smh00075 ID. Staatz, M.H. 75 Pit no. 1 on the Bell Hill property showing the connection with the underground workings. Made in the western part of the Thomas Range on Spor Mountain. Juab County, Utah. April 1953. #1:/Staatz M.H. Collection/smh00076 ID. Staatz, M.H. 76 East side of north end of Spor Mountain showing location of the Blowout, Lost Sheep, Hilltop no. 1, and Oversight mines, in western part of the Thomas Range. Juab County, Utah. April 1953. #1:/Staatz M.H. Collection-Lost Sheep/smh00079 ID. Staatz, M.H. 79 Main pit on the Lost Sheep property back of pit is over 70 feet high. Taken on Spor Mountain in the western part of the Thomas Range. Juab County, Utah. April 1953. #1:/Staatz M.H. Collection-Lost Sheep/smh00080 ID. Staatz, M.H. 80 Open cut on main Lost Sheep ore body. Dump (left background) is from adit to Blowout ore body. Spor Mountain in western part of Thomas Range. Juab County, Utah. April 1953. #1:/North Cascades National Park/smh00180 ID. Staatz, M.H. 180 North Cascades National Park, Washington. Northeast side of Mount Largo rising above thickly forested Ptarmigan Creek. Circa 1966. Figure 2, U.S. Geological Survey Bulletin 1325. #1:/North Cascades National Park/smh00181 ID. Staatz, M.H. 181 North Cascades National Park, Washington. Pinnacles on the ridge to the west of Shull Creek tower above the virgin forests that cloak the valley sides. Circa 1966. Figure 3, U.S. Geological Survey Bulletin 1325. #1:/North Cascades National Park/smh00182 ID. Staatz, M.H. 182 North Cascades National Park, Washington. Shull Creek, one of many beautiful streams in a heavily forested valley. Circa 1966. Figure 4, U.S. Geological Survey Bulletin 1325. #1:/North Cascades National Park/smh00183 ID. Staatz, M.H. 183 North Cascades National Park, Washington. Lake of the Pines, a small tarn high on the south shoulder of Rock Creek. Rocks exposed in the foreground and on the north side of Rock Creek belong to the plagioclase arkose and argillite sequence. Quartz diorite underlies the forest in the center of the picture. Circa 1966. Figure 5, U.S. Geological Survey Bulletin 1325. #1:/North Cascades National Park/smh00187 ID. Staatz, M.H. 187 North Cascades National Park, Washington. Thin-bedded plagioclase arkose on the ridge north of Wildcat Mountain. Circa 1966. Figure 9, U.S. Geological Survey Bulletin 1325. #1:/North Cascades National Park/smh00188 ID. Staatz, M.H. 188 North Cascades National Park, Washington. Plagioclase arkose and argillite sequence exposed where Grizzly Creek has cut along the strike of the beds. View is south. Circa 1966. Figure 10-A, U.S. Geological Survey Bulletin 1325. #1:/North Cascades National Park/smh00194 ID. Staatz, M.H. 194 North Cascades National Park, Washington. Granite of Monument Peak. Lake Mountain and the adjoining ridge are composed of granite. The source of high copper and molybdenum anomalies near the Lake of Woods is concealed by the forest in right center. View is north-northwest. Circa 1966. Figure 14-A, U.S. Geological Survey Bulletin 1325. #1:/North Cascades National Park/smh00196 ID. Staatz, M.H. 196 North Cascades National Park, Washington. Many quartz porphyry dikes, which underlie the small gullies, cut the large granodiorite intrusive on the ridge east of Dot Mountain. Circa 1966. Figure 15, U.S. Geological Survey Bulletin 1325. #1:/North Cascades National Park/smh00197 ID. Staatz, M.H. 197 North Cascades National Park, Washington. Glaciated u-shaped valley of the west fork of the Pasayten River. View is north. Circa 1966. Figure 16, U.S. Geological Survey Bulletin 1325. #1:/North Cascades National Park/smh00199 ID. Staatz, M.H. 199 North Cascades National Park, Washington. Fault on the ridge southwest of Freezeout Lake cuts the plagioclase arkose and argillite sequence. View is southwest. Circa 1966. Figure 18, U.S. Geological Survey Bulletin 1325. #1:/North Cascades National Park/smh00200 ID. Staatz, M.H. 200 North Cascades National Park, Washington. North Big Bosom Butte near Silesia Creek. The butte is made up of volcanic breccia of the Hannegan Pass Volcanics. Circa 1966. #1:/North Cascades National Park/smh00201 ID. Staatz, M.H. 201 North Cascades National Park, Washington. Peak north of Hells Gorge, showing the contact of the Hannegan Pass Volcanics overlapping the granodiorite of the Chilliwack batholith. Circa 1966. #1:/North Cascades National Park/smh00205 ID. Staatz, M.H. 205 North Cascades National Park, Washington. Climbing the steep north face of Mount Shuksan. The valley in the foreground is the North Fork Nooksack River. Circa 1966. #1:/North Cascades National Park/smh00206 ID. Staatz, M.H. 206 North Cascades National Park, Washington. Hannegan Pass Volcanics. Bedded volcanic breccias and tuffs exposed on the south side of Hannegan Peak at the headwaters of Chilliwack Creek. Circa 1966. #1:/North Cascades National Park/smh00210 ID. Staatz, M.H. 210 North Cascades National Park, Washington. South ridge of Davis Peak. Contorted dark-colored biotite and (or) hornblende gneiss and schist with boudinaged mafic-poor quartz diorite. Circa 1966. #1:/North Cascades National Park/smh00221 ID. Staatz, M.H. 221 North Cascades National Park, Washington. Fault west of Freezout Lake. Circa 1966. #1:/North Cascades National Park/smh00222 ID. Staatz, M.H. 222 North Cascades National Park, Washington. Plagioclase arkose and argillite on the ridge west of Trouble Creek in the Three Fools Quadrangle. Strike is north 10 degrees east; dip is 86 degrees west. Mount Hozomeen on the ridge on the right skyline. Note the dike on the left. Circa 1966. #1:/North Cascades National Park/smh00224 ID. Staatz, M.H. 224 North Cascades National Park, Washington. Numerous tributaries of Blum Creek cascading over the granodiorite of the Chilliwack batholith in the Blum Creek cirque. Circa 1966. #1:/North Cascades National Park/smh00225 ID. Staatz, M.H. 225 North Cascades National Park, Washington. East side of Mount Shuksan, viewed from Ruth Mountain. Mount Baker in the distance. Circa 1966. #1:/North Cascades National Park/smh00226 ID. Staatz, M.H. 226 North Cascades National Park, Washington. John Hanley on a pinnacle of breccia of the Hannegan Pass Volcanics on the west side of Ruth Mountain. Circa 1966. #1:/North Cascades National Park/smh00234 ID. Staatz, M.H. 234 North Cascades National Park, Washington. Sulphide cirque showing its altered zone with small Sulphide Glacier in the center. Circa 1966. #1:/North Cascades National Park/smh00265 ID. Staatz, M.H. 265 North Cascades National Park, Washington. Small glaciers that hug the steep north slopes of Easy Ridge. Pioneer Ridge in the background. Circa 1967. Figure 2-A, U.S. Geological Survey Bulletin 1359. #1:/North Cascades National Park/smh00266 ID. Staatz, M.H. 266 North Cascades National Park, Washington. Glacier at the head of Depot Creek cirque on the northeast side of Mount Redoubt. Circa 1967. Figure 2-B, U.S. Geological Survey Bulletin 1359. #1:/North Cascades National Park/smh00267 ID. Staatz, M.H. 267 North Cascades National Park, Washington. Custer Gneiss overlain by Skagit Volcanics on the west side of a spur of Glacier Peak. Circa 1967. Figure 3, U.S. Geological Survey Bulletin 1359. #1:/North Cascades National Park/smh00268 ID. Staatz, M.H. 268 North Cascades National Park, Washington. Uniform biotite gneiss exposed on the north side of McMillan Spire. Circa 1967. Figure 4-A, U.S. Geological Survey Bulletin 1359. #1:/North Cascades National Park/smh00269 ID. Staatz, M.H. 269 North Cascades National Park, Washington. Uniform biotite gneiss, a layer in the banded gneiss unit on the south ridge of Davis Peak. Circa 1967. Figure 4-B, U.S. Geological Survey Bulletin 1359. #1:/North Cascades National Park/smh00270 ID. Staatz, M.H. 270 North Cascades National Park, Washington. Recrystallized mylonite in the banded gneiss unit northwest of Mount Redoubt. Large rounded white masses are light-colored quartz diorite; small white masses are feldspar. Circa 1967. Figure 4-C, U.S. Geological Survey Bulletin 1359. #1:/North Cascades National Park/smh00271 ID. Staatz, M.H. 271 North Cascades National Park, Washington. Swirled banded gneiss made up of layers of dark and light-colored biotite quartz gneiss. The white rock, under the pick handle and in the upper left corner, is light-colored diorite. View is from the south ridge of Davis Peak. Circa 1967. Figure 5-A, U.S. Geological Survey Bulletin 1359. #1:/North Cascades National Park/smh00272 ID. Staatz, M.H. 272 North Cascades National Park, Washington. Fairly uniform biotite gneiss crosscuts banded gneiss on the south ridge of Davis Peak. Dikes and sills are light-colored quartz diorite. Circa 1967. Figure 5-B, U.S. Geological Survey Bulletin 1359. #1:/North Cascades National Park/smh00273 ID. Staatz, M.H. 273 North Cascades National Park, Washington. Banded gneiss made up of layers of dark biotite gneiss in light-colored biotite and hornblende gneiss on the south ridge of Davis Peak. The whitest layers are light-colored quartz diorite. Circa 1967. Figure 5-C, U.S. Geological Survey Bulletin 1359. #1:/North Cascades National Park/smh00274 ID. Staatz, M.H. 274 North Cascades National Park, Washington. Thin-bedded chert in the Hozomeen Group which crops out on the ridge between Noname and Skymo Creeks. Circa 1967. Figure 6, U.S. Geological Survey Bulletin 1359. #1:/North Cascades National Park/smh00275 ID. Staatz, M.H. 275 North Cascades National Park, Washington. Well-foliated greenschist, with numerous thin layers and lenses of quartz, exposed on the north side of Sulphide Basin. Circa 1967. Figure 7, U.S. Geological Survey Bulletin 1359. #1:/North Cascades National Park/smh00276 ID. Staatz, M.H. 276 North Cascades National Park, Washington. Crinkled phyllite, containing numerous irregular white quartz lenses, exposed south of Berdeen Lake. Circa 1967. Figure 8, U.S. Geological Survey Bulletin 1359. #1:/North Cascades National Park/smh00278 ID. Staatz, M.H. 278 North Cascades National Park, Washington. Hannegan Volcanics. Volcanic breccia on Pioneer Ridge. Fragments are principally granodiorite, biotite schist, and dark-gray diorite. Circa 1967. Figure 12-A, U.S. Geological Survey Bulletin 1359. #1:/North Cascades National Park/smh00280 ID. Staatz, M.H. 280 North Cascades National Park, Washington. Sheared quartz diorite of the Chilliwack composite batholith forms the western buttress of Whatcom Peak to the northwest of Perfect Pass. Lighter-colored granodiorite underlies the mountain in the left foreground. Circa 1967. Figure 14, U.S. Geological Survey Bulletin 1359. #1:/North Cascades National Park/smh00281 ID. Staatz, M.H. 281 North Cascades National Park, Washington. Well-jointed quartz monzonite exposed on the north side of the peak northwest of Pocket Lake, on the west side of Ensawkwatch Creek. Circa 1967. Figure 13, U.S. Geological Survey Bulletin 1359. #1:/North Cascades National Park/smh00282 ID. Staatz, M.H. 282 North Cascades National Park, Washington. Rocks of the Chilliwack composite batholith. An alaskite body (white) intrudes granodiorite on the south side of Bear Mountain. Circa 1967. Figure 15 A, U.S. Geological Survey Bulletin 1359. #1:/North Cascades National Park/smh00283 ID. Staatz, M.H. 283 North Cascades National Park, Washington. Rocks of the Chilliwack composite batholith. Inclusions of hornblende diorite (dark pieces) in granodiorite near Copper Lake, 1.5 miles southeast of Copper Mountain. Circa 1967. Figure 15-B, U.S. Geological Survey Bulletin 1359. #1:/North Cascades National Park/smh00284 ID. Staatz, M.H. 284 North Cascades National Park, Washington. A u-shaped valley is formed along the northwest-flowing tributary of Indian Creek. Indian Mountain lies to the right of the valley, and a part of Red Face Mountain is to left. The small crescent-shaped lake in the valley is Lake Reveille. Circa 1967. Figure 16-A, U.S. Geological Survey Bulletin 1359. #1:/North Cascades National Park/smh00285 ID. Staatz, M.H. 285 North Cascades National Park, Washington. Mount Despair forms a jagged horn in the southern part of this area. Circa 1967. Figure 16-B, U.S. Geological Survey Bulletin 1359. #1:/North Cascades National Park/smh00286 ID. Staatz, M.H. 286 North Cascades National Park, Washington. Falls cascade down a narrow chute in phyllite just south of Berdeen Lake. Circa 1967. Figure 16-C, U.S. Geological Survey Bulletin 1359. #1:/North Cascades National Park/smh00287 ID. Staatz, M.H. 287 North Cascades National Park, Washington. Eastern part of the East Nooksack Glacier at the head of the North Fork Nooksack River. The ridge above is Jagged Ridge. Rocks above the glacier are phyllite, those below are granodiorite. Circa 1967. Figure 17-A, U.S. Geological Survey Bulletin 1359. #1:/North Cascades National Park/smh00288 ID. Staatz, M.H. 288 North Cascades National Park, Washington. Numerous crevasses on Challenger Glacier. The top of Mount Challenger is on the right, and Luna Peak is the prominent horn in the left background. Circa 1967. Figure 17-B, U.S. Geological Survey Bulletin 1359. #1:/North Cascades National Park/smh00289 ID. Staatz, M.H. 289 North Cascades National Park, Washington. Sulphide Glacier on the left and Crystal Glacier on the right, separated by a narrow rock septum on the south side of Mount Shuksan. Circa 1967. Figure 17-C, U.S. Geological Survey Bulletin 1359. #1:/North Cascades National Park/smh00291 ID. Staatz, M.H. 291 North Cascades National Park, Washington. Joints in alaskite of the southern phase above Berdeen Lake. Circa 1967. #1:/North Cascades National Park/smh00292 ID. Staatz, M.H. 292 North Cascades National Park, Washington. Mount Challenger and Challenger Glacier. Hornblende-biotite quartz diorite of the Percy Creek phase. Circa 1967. #1:/North Cascades National Park/smh00293 ID. Staatz, M.H. 293 North Cascades National Park, Washington. Curtis Glacier and Shuksan Arm. Circa 1967. #1:/North Cascades National Park/smh0267a ID. Staatz, M.H. 267a North Cascades National Park, Washington. Custer Gneiss overlain by Skagit Volcanics on the west side of a spur of Glacier Peak. Circa 1967. Figure 3, U.S. Geological Survey Bulletin 1359. #1:/North Cascades National Park/smh0277a ID. Staatz, M.H. 277a North Cascades National Park, Washington. Arkoses interbedded with thin beds of black argillite of the Chuckanut Formation make up the north side of Bacon Peak. Glacier in the foreground. Circa 1967. Figure 11, U.S. Geological Survey Bulletin 1359. Photos smh0277a and smh0277b form a panorama. #1:/North Cascades National Park/smh0277b ID. Staatz, M.H. 277b North Cascades National Park, Washington. Arkoses interbedded with thin beds of black argillite of the Chuckanut Formation make up the north side of Bacon Peak. Glacier in the foreground. Circa 1967. Figure 11, U.S. Geological Survey Bulletin 1359. Photos smh0277a and smh0277b form a panorama. #1:/Grand Canyon National Park/smi00073 ID. Smith, W.0. 73 Grand Canyon National Park, Arizona. Lower Granite Gorge upstream from North Separation Canyon. Photo by U.S. Bureau of Reclamation, 1939. Plate 16-A, U.S. Geological Survey Professional Paper 295-H. #1:/Grand Canyon National Park/smi00074 ID. Smith, W.0. 74 Grand Canyon National Park, Arizona. Lower Granite Gorge upstream from North Separation Canyon. Photo by U.S. Bureau of Reclamation, October 1948. Plate 16-B, U.S. Geological Survey Professional Paper 295-H. #1:/Shaler M.K. Collection-Porter Mine/smk00002 ID. Shaler, M.K. 2 Looking north toward Porter Mine and tipple, Porter. La Plata County, Colorado. 1906. #1:/Aztec Ruins National Monument/smk00041 ID. Shaler, M.K. 41 Aztec Ruins National Monument, New Mexico. Aztec ruins 9 miles south of Shawnees trading post on Rio Chaco, above the mouth of Coal Creek, Vacinte Valley, looking southeast. 1906. #1:/El Morro National Monument/smk00081 ID. Shaler, M.K. 81 El Morro National Monument, New Mexico. Spanish inscriptions and petrogylphs on Inscription Rock. 1906. #1:/El Morro National Monument/smk00083 ID. Shaler, M.K. 83 El Morro National Monument, New Mexico. Inscription Rock southeast of Ramah. 1906. #1:/Mesa Verde National Park/smk00125 ID. Shaler, M.K. 125 Mesa Verde National Park, Colorado. Small cliff house in Mesa Verde Sandstone cliff in Cliff Canyon, 2 miles above the canyon mouth. 1906. #1:/Mesa Verde National Park/smk00126 ID. Shaler, M.K. 126 Mesa Verde National Park, Colorado. Cliff house in Mesa Verde Sandstone Cliff in Cliff Canyon, 2 miles above the canyon mouth. 1906. #1:/Shaler M.K. Collection-Perrine Peak Coal Mine/smk00134 ID. Shaler, M.K. 134 Engine house, tipple and incline at the Perrine Peak Coal Mine, near Durango. La Plata County, Colorado. August 8, 1906. #1:/Aztec Ruins National Monument/smk00148 ID. Shaler, M.K. 148 Aztec Ruins National Monument, New Mexico. Aztec ruins 10 miles up Vacinti Valley from Chaco Canyon. 1906. #1:/Alaska/snj00001 ID. Silberling, N.J. 1ct Alaska. Triassic and Jurassic rocks of the Chulitna Terrane exposed on the north side of upper Shotgun Creek. The section is overturned and dips northwest. Black and white banded rocks are Upper Triassic Limestone and pillow basalt conformably overlain by Upper Triassic redbeds. These grade up into Triassic and Jurassic brown sandstone and argillite with abundant marine fossils. Distance of view from northwest to southeast is about 2.5 kilometers; vertical relief over 600 meters. View is northeast. Circa 1977. Frontispiece, U.S. Geological Survey Professional Paper 1121-A. #1:/Alaska/sps00099 ID. Smith, P.S. 99 Alaska. Solifluction lobes at the head of Chicken Creek on the Seward Peninsula. These lobe-like-sheets of soil and rock probably move downslope by creep. Pre-1910. Plate 10-B, U.S. Geological Survey Bulletin 433; Plate 2, figure 5, U.S. Geological Survey Professional Paper 482. Survey Bulletin 815. Photos sps00570 and sps00571 form a panorama. #1:/Mount Rainier National Park/srs00030 ID. Sigafoos, R.S. 30 Mount Rainier National Park, Washington. The age of a tree is estimated from a count of annual rings in a section or a core extracted from a tree with an increment borer. The 3/16 inch-diameter core is then placed in a special clamp, cut across the grain with a razor-sharp knife, and rings counted. Age, species, sample number, core height, and trunk diameter are recorded. This 3.4-inch western hemlock, growing on an old Carbon Glacier moraine, was 4 feet tall in 1542. Figure 1, U.S. Geological Survey Professional Paper 387-B. #1:/Mount Rainier National Park/srs00031 ID. Sigafoos, R.S. 31 Mount Rainier National Park, Washington. Trees are sampled at the lowest possible level to determine their age. The date is obtained by subtracting the number of annual rings in a complete sample from the number of the year after the outer ring was formed. The next year must be used, for although the last year of growth of a tree is not complete by midsummer, for dating purposes the outer ring and growth year are complete. Carbon Glacier started to recede from here about 1845. Figure 2, U.S. Geological Survey Professional Paper 387-B. #1:/Mount Rainier National Park/srs00032 ID. Sigafoos, R.S. 32 Mount Rainier National Park, Washington. Lower part of Nisqually Glacier. About 130 years ago, the glacier extended about 600 feet below the bridge and filled the valley from wall to wall. The terminus could not have been beyond a point above the bridge when Lt.A.V. Kautz saw it in 1857. The glacier has since retreated to its present position. September 22, 1966. Plate 2, Figure 1, U.S. Geological Survey Professional Paper 387-B. #1:/Mount Rainier National Park/srs00035 ID. Sigafoos, R.S. 35 Mount Rainier National Park, Washington. From the west of South Tahoma Glacier which filled the valley in the foreground 130 years ago. It was joined by the left arm of Tahoma Glacier which occupied the barren valley extending left to right and left moraines on the west side of the valley below the prominent hill (Glacier Island) in the foreground and on Emerald Ridge on the left. #1:/Mount Rainier National Park-Professional Paper 387-B/srs00038 ID. Sigafoos, R.S. 38 South Tahoma Glacier and Tahoma Glacier joined in 1910 below Glacier Island and extended out of view to the lower left. Mount Rainier National Park, Pierce County, Washington. July 15, 1960. (Panorama with Photo No. srs00039) Photo nos. srs00038-srs00039 form a panorama published as figure 3 in U. S. Geological Survey. Professional paper 387-B. 1972. #1:/Mount Rainier National Park-Professional Paper 387-B/srs00039 ID. Sigafoos, R.S. 39 South Tahoma Glacier and Tahoma Glacier joined in 1910 below Glacier Island and extended out of view to the lower left. Mount Rainier National Park, Pierce County, Washington. July 15, 1960. (Panorama with Photo No. srs00038) Photo nos. srs00038-srs00039 form a panorama published as figure 3 in U. S. Geological Survey. Professional paper 387-B. 1972. #1:/Mount Rainier National Park-Professional Paper 387-B/srs00040 ID. Sigafoos, R.S. 40 From its junction with Tahoma Creek Trail in the immediate foreground, Wonderland Trail leaves the 1550 moraine and crosses the 1840 moraine where the man is standing. Mount Rainier National Park, Pierce County, Washington. Sept. 9, 1967. Published as figure 4 in U. S. Geological Survey. Professional paper 387-B. 1972. #1:/Mount Rainier National Park/srs00046 ID. Sigafoos, R.S. 46 Mount Rainier National Park, Washington. Puyallup Glacier below Sunset Amphitheater which is the nearly vertical bedrock cliff below the crest of the mountain. In the early 19th century, Puyallup Glacier, which here curves around the prominent bedrock knob to the left of center and pokes through the narrow canyon in the center, plunged over the cliffs and flowed nearly to the spot which is now the parking area at the end of West Side Road. August 29, 1969. Plate 4, Figure 2, U.S. Geological Survey Professional Paper 387-B. #1:/Mount Rainier National Park/srs00048 ID. Sigafoos, R.S. 48 Mount Rainier National Park, Washington. The advancing terminus of Carbon Glacier shows its closeness to the maximum advance in 10,000 years. The terminus started to recede from the area about 1760. Earlier, near the end of the 15th century, the glacier was broader near the terminus and left moraines. Cataract Creek, not clearly, occupies the valley in the foreground, flowing from the right to Carbon River in left center. View is southeast. Aug. 29, 1969. Plate 5, Figure 1, U.S. Geological Survey Professional Paper 387-B. #1:/Mount Rainier National Park/srs00049 ID. Sigafoos, R.S. 49 Mount Rainier National Park, Washington. End of the moraine from which Carbon Glacier started to recede about 1760, viewed from Wonderland Trail. The glacier is to the south about three-quarters of a mile. September 10, 1968. Plate 5, Figure 5, U.S. Geological Survey Professional Paper 387-B. Photos srs00049 and srs00050 form a panorama. #1:/Mount Rainier National Park/srs00050 ID. Sigafoos, R.S. 50 Mount Rainier National Park, Washington. End of the moraine from which Carbon Glacier started to recede about 1760, viewed from Wonderland Trail. The glacier is to the south about three-quarters of a mile. September 10, 1968. Plate 5, Figure 5, U.S. Geological Survey Professional Paper 387-B. Photos srs00049 and srs00050 form a panorama. #1:/Mount Rainier National Park/srs00053 ID. Sigafoos, R.S. 53 Mount Rainier National Park, Washington. The lower part of Winthrop Glacier toward the southwest shows the white crevassed dark gray gravel-covered active terminus and down-valley face of the stagnant ice. The 2,000- to 3,500-year- old advance left lateral moraines of the forested slope to the left high above the stagnant ice but not visible on the photograph. Winthrop Glacier extended down-valley in the early part of the 18th century. Winthrop Creek is on the left, and West Fork White River is on the right. August 29, 1969. Plate 6, Figure 1, U.S. Geological Survey Professional Paper 387-B. #1:/Mount Rainier National Park/srs00054 ID. Sigafoos, R.S. 54 Mount Rainier National Park, Washington. From about 145 to 230 years ago, Winthrop Glacier occupied most of the area shown here. The nearly barren hill of debris in the center is between Winthrop Creek on the right and West Fork White River on the left. The dense forest in the middle distance is growing on an older surface. Wonderland Trail, in the center foreground, extends northeast and east over the moraine to the extreme right center. In the foreground and into the center, the trail follows the 1810 terminal position of the glacier. The sample area is on the moraine to the right of center. Material underlying the flat plain across the middle cut by the narrow bouldery ridge in the center was deposited in a pond behind the 1755 terminal moraine. This pond soon drained into West Fork White River on the left as did melt water from the glacier as it receded southward to the right. The melt-water channel is lined with alder shrubs from right to left across the photograph. Plate 6, Figure 3, U.S. Geological Survey Professional Paper 387-B. #1:/Mount Rainier National Park/srs00056 ID. Sigafoos, R.S. 56 Mount Rainier National Park, Washington. Emmons Glacier strikingly shows the active terminus covered with 1963 avalanche debris. The glacier was extended across the forested valley bottom perhaps as early as 1655. When I.C. Russell and his party saw the glacier in 1896, it occupied the valley now filled with bare gravel and boulders. Inter Fork flows from the closed basin on the viewer's right of the valley, and White River flows from the terminus down the viewer's left of the valley. August 29, 1969. Plate 7, Figure 8, U.S. Geological Survey Professional Paper 387-B. #1:/Mount Rainier National Park/srs00061 ID. Sigafoos, R.S. 61 Mount Rainier National Park, Washington. The bare amphitheater in the center holds immobile ice that was once part of Ohanapecosh Glacier. Today, Ohanapecosh Glacier is restricted to the sloping, partly snow-covered surface above the bedrock cliff. The glacier could not have been beyond the youngest dated moraine after 1878, beyond the middle moraine after 1846, nor beyond the oldest moraine area after 1741. The summit of Mount Rainier is the snow-clad mound forming the apparent horizon on the left. View is northwest. September 27, 1967. Figure 11, U.S. Geological Survey Professional Paper 387-B. #1:/Mount Rainier National Park/srs00062 ID. Sigafoos, R.S. 62 Mount Rainier National Park, Washington. Ohanapecosh River valley near Ohanapecosh Glacier, showing an immobile remnant of the glacier. August 29, 1969. Figure 12, U.S. Geological Survey Professional Paper 387-B. #1:/Mount Rainier National Park Professional Paper 387-A/srs00070 ID. Sigafoos, R.S. 70 Moraines of Emmons Glacier in the valley of White River and Inter Fork, Emmons Glacier is visible upstream to left of area 22. Baker Point is the prominent snow-covered ridge at top left. Numbered points indicate the approximate locations of areas studied (extents from braided stream next to forest in center foreground to left curve of stream in the middle ground). Mount Rainer National Park, Pierce County, Washington. July 18, 1959. Published as figure 9 in U. S. Geological Survey. Professional paper 387-A. 1961. #1:/Schnabel R.W. Collection/srw00006 ID. Schnabel, R.W. 6ct Flatirons, west flank of Rapplee anticline, San Juan County, Utah. n.d. #1:/Devils Tower National Monument/srw00369 ID. Stone, R.W. 369 Devils Tower National Monument, Wyoming. Horse-drawn wa:gon and men fording Belle Fourche River, 2 miles above Devils Tower. The tower is barely visible in the background. 1908. #1:/Devils Tower National Monument/srw00373 ID. Stone, R.W. 373 Devils Tower National Monument, Wyoming. Devils Tower and Missouri Buttes, viewed from the divide of Cabin Creek, 12 miles south. 1908. #1:/Yellowstone National Park/srw00476 ID. Stone, R.W. 476 Yellowstone National Park, Wyoming. Looking across Paint Pots in Lower Geyser Basin. 1911. #1:/Yellowstone National Park/srw00477 ID. Stone, R.W. 477 Yellowstone National Park, Wyoming. Riverside Geyser in Upper Geyser Basin in eruption. 1911. #1:/Yellowstone National Park/srw00479 ID. Stone, R.W. 479 Yellowstone National Park, Wyoming. Needles eroded in basalt on the bank of the Yellowstone River below Tower Falls. 1911. #1:/Stone R.W. Collection-Gypsum Quarry/srw00725 ID. Stone, R.W. 725 Gypsum quarry Nephi Plaster & Manufacturing Company. Quarry face nearly 500 feet high. Mining in 1916 by drift and glory hole above loading shed at upper end of tram. Nephi, Juab County, Utah. August 1916. #1:/Stone R.W. Collection-Gypsum Quarry/srw00727 ID. Stone, R.W. 727 Valley wall opposite gypsum quarry shows absence of gypsum north of creek. Taken from loading shed near top of quarry. Nephi, Juab County, Utah. August 1916. #1:/Stone R.W. Collection-Gypsum Mill/srw00728 ID. Stone, R.W. 728 Nephi Plaster & Manufacturing Company Gypsum mill at Nephi, Juab County, Utah. August 1916. #1:/Stone R.W. Collection-Gypsum Quarry/srw00729 ID. Stone, R.W. 729 Gypsum quarry one and one-half miles east of Levan. Jaub County, Utah. August, 1916. #1:/Stone R.W. Collection-Plaster and Cement Company Mill/srw00730 ID. Stone, R.W. 730 Mill of Jumbo Plaster and Cement Company, gypsum is quarried in hills above tent. Sigurd. Juab County, Utah. August 1916. #1:/Stevens T.A. Collection/sta00007 ID. Stevens, T.A. 7 Town site of Summitville from South Mountain looking down Wightman Fork. Summitville district, San Juan Mountains. Rio Grande County, Colorado. 1953. #1:/Stevens T.A. Collection/sta00011 ID. Stevens, T.A. 11 Tewksbury vein seen from Iowa Boarding House, Summitville district, San Juan Mountains. Rio Grande County, Colorado. 1953. #1:/Stevens T.A. Collection/sta00017 ID. Stevens, T.A. 17 Copper Hill from Iowa Boarding House. Summitville district, San Juan Mountains. Rio Grande County, Colorado. 1953. #1:/Cox D.C. Collection/sta00021 ID. Stevens, T.A. 21 Western Mill and Camp. Photo by D.C. Cox. Northgate district. Jackson County, Colorado. August 30, 1944. #1:/Stevens T.A. Collection/sta00025 ID. Stevens, T.A. 25 Shaft and hoist house, Camp Creek Mine. Northgate district, Jackson County, Colorado. August 30, 1944. #1:/Stevens T.A. Collection-Fluorine Open Pit/sta00028 ID. Stevens, T.A. 28 Looking from north end Fluorine open pit. Northgate district, Jackson County, Colorado. August 30, 1944. #1:/Stevens T.A. Collection-Fluorine Open Pit/sta00029 ID. Stevens, T.A. 29 Looking down into Fluorine open pit. Northgate district. Jackson County, Colorado. September 13, 1944. #1:/Stevens T.A. Collection/sta00046 ID. Stevens, T.A. 46 Mining camp from Dean Peak. Northgate district, Jackson County, Colorado. 1949. #1:/Stevens T.A. Collection-Fluorspar Mill/sta00048 ID. Stevens, T.A. 48 Taken from coarse tailings pile looking east toward Fluorspar mill. Glory hole can be seen near top of hill. Northgate district, Jackson County, Colorado. 1949. #1:/Stevens T.A. Collection/sta00117 ID. Stevens, T.A. 117 Portal of lower adit (New Cascade tunnel) of main prospect workings on Cascade Creek. La Garita Wilderness Area. Mineral County, Colorado. 1971. Figure 5 in U.S. Geological Survey. Bulletin 1420. 1977. #1:/Steele T.D. Collection-Energy Fuels/std00004 ID. Steele, T.D. 4 Dragline at Energy Fuels No. 1 Mine - coal strip mine. Routt County, Colorado.n.d. Figure 1-D in U.S. Geological Survey. Circular 839. 1981. #1:/Steele T.D. Collection-Edna Mine/std00006 ID. Steele, T.D. 6 Runoff from waste spoils, Edna Mine. Routt County, Colorado.n.d. Figure 1-F in U.S. Geological Survey. Circular 839. 1981. #1:/Glacier National Park/ste0366a ID. Stebinger, E.C. 366a Glacier National Park, Montana. Sill in Siyeh Limestone on the east face of Mount Gould, viewed from Cataract Mountain. The dark band across the center is rock that was intruded while in a molten condition. The bleached and baked zones above and below the sill attest to the heat of the sill while it was being emplaced. August 1914. Figure 130, U.S. Geological Survey Professional Paper 294-K. #1:/Glacier Bay National Park and Preserve/stw00216 ID. Stanton, T.W. 216 Glacier Bay National Park and Preserve, Alaska. La Perouse Glacier north of Icy Point. 1904. #1:/Stanton T.W. Collection-Brooks Coal Mine/stw00242 ID. Stanton, T.W. 242 Brooks Coal Mine south of Yampa River near mouth of Trout Creek. Routt County, Colorado. 1905. #1:/Stanton T.W. Collection-Brooks Coal Mine/stw00243 ID. Stanton, T.W. 243 General view of exposures at Brooks Coal Mine. Routt County, Colorado. 1905. #1:/Glacier National Park/stw00618 ID. Stanton, T.W. 618 Glacier National Park, Montana.U.S. Geological Survey camp at the outlet of Lake McDonald. Bales of hay on the left, flags on the right. 1911. #1:/Glacier National Park/stw00622 ID. Stanton, T.W. 622 Glacier National Park, Montana. Stanton Mountain reflected in Lake McDonald. 1911. #1:/Glacier National Park/stw00623 ID. Stanton, T.W. 623 Glacier National Park, Montana. McPartland Mountain, viewed from rapids in McDonald Creek. 1911. #1:/Glacier National Park/stw00625 ID. Stanton, T.W. 625 Glacier National Park, Montana. Canon Mountain and Mount Brown, viewed from the northwest shore of Lake McDonald. 1911. #1:/Glacier National Park/stw00626 ID. Stanton, T.W. 626 Glacier National Park, Montana. Upper end of Lake McDonald, viewed from the Glacier Hotel dock. 1911. #1:/Glacier National Park/stw00632 ID. Stanton, T.W. 632 Glacier National Park, Montana. Down Bear Creek in John Stevens Canyon from the railroad grade near Fielding. 1911. #1:/Glacier National Park/stw00637 ID. Stanton, T.W. 637 Glacier National Park, Montana. Summit Mountain, viewed from the southwest. Fault contact of Cretaceous with Algonkian (Altyn Limestone) on slope. 1911. #1:/Glacier National Park/stw00647 ID. Stanton, T.W. 647 Glacier National Park, Montana. Mount Saint Nicholas, viewed from the top of the divide south of Railroad Creek, near its head. 1911. #1:/Glacier National Park/stw00648 ID. Stanton, T.W. 648 Glacier National Park, Montana. From Calf Robe(?) Mountain: Summit Mountain on the extreme left (photo stw00648), Mount Despair (photo stw00649), Eagle Ribs (photo stw00650), Grizzly Mountain and part of Red Crow Mountain. 1911. Photos stw00648, stw00649, stw00650, stw00651 form a panorama. #1:/Glacier National Park/stw00649 ID. Stanton, T.W. 649 Glacier National Park, Montana. From Calf Robe(?) Mountain: Summit Mountain on the extreme left (photo stw00648), Mount Despair (photo stw00649), Eagle Ribs (photo stw00650), Grizzly Mountain and part of Red Crow Mountain. 1911. Photos stw00648, stw00649, stw00650, stw00651 form a panorama. #1:/Glacier National Park/stw00650 ID. Stanton, T.W. 650 Glacier National Park, Montana. From Calf Robe(?) Mountain: Summit Mountain on the extreme left (photo stw00648), Mount Despair (photo stw00649), Eagle Ribs (photo stw00650), Grizzly Mountain and part of Red Crow Mountain. 1911. Photos stw00648, stw00649, stw00650, stw00651 form a panorama. #1:/Glacier National Park/stw00651 ID. Stanton, T.W. 651 Glacier National Park, Montana. From Calf Robe(?) Mountain: Summit Mountain on the extreme left (photo stw00648), Mount Despair (photo stw00649), Eagle Ribs (photo stw00650), Grizzly Mountain and part of Red Crow Mountain. 1911. Photos stw00648, stw00649, stw00650, stw00651 form a panorama. #1:/Glacier National Park/stw00653 ID. Stanton, T.W. 653 Glacier National Park, Montana. The Old Squaw, a huge block of argillite that has become separated from the main mass of Squaw Mountain, viewed from the hotel at Glacier Park station. 1911. Plate 3-A, U.S. Geological Survey Bulletin 600. #1:/Glacier National Park/stw00655 ID. Stanton, T.W. 655 Glacier National Park, Montana. Anticline in Appekunny Argillite on Midvale Creek. 1911. #1:/Glacier National Park/stw00657 ID. Stanton, T.W. 657 Glacier National Park, Montana. Ridge of Kootenai(?) Sandstone and Conglomerate south of Railroad Creek, 1.5 miles northeast of Lubec. 1911. #1:/Glacier National Park/stw00658 ID. Stanton, T.W. 658 Glacier National Park, Montana. Two Medicine Valley, viewed from Scenic Point, 2,100 feet above the lake. Rising Wolf Mountain on the right (photo stw00660), Appistoki Peak (photo stw00658) and Mount Rockwell (photo stw00659) in the center. Mount Saint Nicholas is the distant peak just to the left of Mount Rockwell, and Mount Phillips is to the left of Rising Wolf. Dawson Pass is visible to the right of Mount Phillips. 1911. Plate 2-A, U.S. Geological Survey Bulletin 600. Photos stw00658, stw00659, stw00660 form a panorama. #1:/Glacier National Park/stw00659 ID. Stanton, T.W. 659 Glacier National Park, Montana. Two Medicine Valley, viewed from Scenic Point, 2,100 feet above the lake. Rising Wolf Mountain on the right (photo stw00660), Appistoki Peak (photo stw00658) and Mount Rockwell (photo stw00659) in the center. Mount Saint Nicholas is the distant peak just to the left of Mount Rockwell, and Mount Phillips is to the left of Rising Wolf. Dawson Pass is visible to the right of Mount Phillips. 1911. Plate 2-A, U.S. Geological Survey Bulletin 600. Photos stw00658, stw00659, stw00660 form a panorama. #1:/Glacier National Park/stw00660 ID. Stanton, T.W. 660 Glacier National Park, Montana. Two Medicine Valley, viewed from Scenic Point, 2,100 feet above the lake. Rising Wolf Mountain on the right (photo stw00660), Appistoki Peak (photo stw00658) and Mount Rockwell (photo stw00659) in the center. Mount Saint Nicholas is the distant peak just to the left of Mount Rockwell, and Mount Phillips is to the left of Rising Wolf. Dawson Pass is visible to the right of Mount Phillips. 1911. Plate 2-A, U.S. Geological Survey Bulletin 600. Photos stw00658, stw00659, stw00660 form a panorama. #1:/Glacier National Park/stw00664 ID. Stanton, T.W. 664 Glacier National Park, Montana. Flinsch Peak, viewed from the divide between Cut Bank and Two Medicine. 1911. #1:/Glacier National Park/stw00665 ID. Stanton, T.W. 665 Glacier National Park, Montana. South and west from Mount Morgan, south of Cut Bank Pass, extending from Flinsch Peak on the left (photo stw00665) to Mount Phillips (photo stw00666), Mount Pinchot and Mount Stimson on the right (photo stw00667). 1911. Photos stw00665, stw00666, stw00667 form a panorama. #1:/Glacier National Park/stw00666 ID. Stanton, T.W. 666 Glacier National Park, Montana. South and west from Mount Morgan, south of Cut Bank Pass, extending from Flinsch Peak on the left (photo stw00665) to Mount Phillips (photo stw00666), Mount Pinchot and Mount Stimson on the right (photo stw00667). 1911. Photos stw00665, stw00666, stw00667 form a panorama. #1:/Glacier National Park/stw00667 ID. Stanton, T.W. 667 Glacier National Park, Montana. South and west from Mount Morgan, south of Cut Bank Pass, extending from Flinsch Peak on the left (photo stw00665) to Mount Phillips (photo stw00666), Mount Pinchot and Mount Stimson on the right (photo stw00667). 1911. Photos stw00665, stw00666, stw00667 form a panorama. #1:/Glacier National Park/stw00673 ID. Stanton, T.W. 673 Glacier National Park, Montana. Triple Divide Peak. From this peak (right of center), the waters drain into the Gulf of Mexico, Hudson Bay and the Pacific Ocean. Split Mountain on the right and Norris Mountain in the center. On the far side, both these mountains have vertical walls more than 1,000 feet high. 1911. Plate 3-B, U.S. Geological Survey Bulletin 600. #1:/Glacier National Park/stw00674 ID. Stanton, T.W. 674 Glacier National Park, Montana. Glacier on the west side of North Fork Cut Bank Creek, 2 miles north of Cut Bank Pass. 1911. #1:/Glacier National Park/stw00680 ID. Stanton, T.W. 680 Glacier National Park, Montana. Up Boulder Creek, viewed from Flattop Mountain. 1911. #1:/Glacier National Park/stw00685 ID. Stanton, T.W. 685 Glacier National Park, Montana. Summit of Chief Mountain, viewed from the northern end of the mountain. Yellow Mountain in the distance. 1911. #1:/Glacier National Park/stw00687 ID. Stanton, T.W. 687 Glacier National Park, Montana. Pinnacle (Ninaki?) of Altyn Limestone resting on Cretaceous coal-bearing shale and sandstone on the divide running southwest from Chief Mountain. 1911. #1:/Glacier National Park/stw00690 ID. Stanton, T.W. 690 Glacier National Park, Montana. Iceberg Glacier and lake. 1911. #1:/Glacier National Park/stw00691 ID. Stanton, T.W. 691 Glacier National Park, Montana. Iceberg Glacier and lake. 1911. #1:/Glacier National Park/stw00698 ID. Stanton, T.W. 698 Glacier National Park, Montana. South and west from the south slope of Appekunny Mountain: Canyon Creek (photo stw00698), Siyeh Mountain, Allen Mountain, Mount Gould (photo ste00699), part of The Garden Wall, Gem Glacier, Grinnell Glacier, Mount Grinnell, Altyn Peak, Lake Josephine, McDermott (Swiftcurrent) Lake. 1911. Photos stw00698 and stw00699 form a panorama. #1:/Glacier National Park/stw00699 ID. Stanton, T.W. 699 Glacier National Park, Montana. South and west from the south slope of Appekunny Mountain: Canyon Creek (photo stw00698), Siyeh Mountain, Allen Mountain, Mount Gould (photo ste00699), part of The Garden Wall, Gem Glacier, Grinnell Glacier, Mount Grinnell, Altyn Peak, Lake Josephine, McDermott (Swiftcurrent) Lake. 1911. Photos stw00698 and stw00699 form a panorama. #1:/Glacier National Park/stw00700 ID. Stanton, T.W. 700 Glacier National Park, Montana. Cascades in Swiftcurrent Creek below Swiftcurrent Lake. Mount Grinnell in the background. 1911. #1:/Glacier National Park/stw00701 ID. Stanton, T.W. 701 Glacier National Park, Montana. Swiftcurrent Valley with McDermott (Swiftcurrent) Lake in the foreground. Mount Grinnell on the right and Mount Gould on the left. The lake is held in place by the great limestone barrier that crosses the valley in the foreground. 1911. Plate 5-A, U.S. Geological Survey Bulletin 600. #1:/Glacier National Park/stw00702 ID. Stanton, T.W. 702 Glacier National Park, Montana. Mount Gould, viewed from the shore of Altyn Lake (Lake Josephine). 1911. #1:/Glacier National Park/stw00703 ID. Stanton, T.W. 703 Glacier National Park, Montana. Gem Glacier,Grinnell Glacier, and The Garden Wall, viewed from the slope north of Grinnell Lake. 1911. #1:/Glacier National Park/stw00708 ID. Stanton, T.W. 708 Glacier National Park, Montana. Lower end of Grinnell Glacier. Mount Gould in the background. Band of dark diorite showing half-way up the slope of the mountain. Lateral moraine piled up by the glacier in the foreground. 1911. Plate 6-A, U.S. Geological Survey Bulletin 600. #1:/Glacier National Park/stw00711 ID. Stanton, T.W. 711 Glacier National Park, Montana. Cascade in Grinnell Glacier. Terminal moraine in the foreground. 1911. #1:/Glacier National Park/stw00713 ID. Stanton, T.W. 713 Glacier National Park, Montana. The Garden Wall and the upper part of Gem Glacier, viewed from the slope of Mount Gould. 1911. #1:/Glacier National Park/stw00714 ID. Stanton, T.W. 714 Glacier National Park, Montana. Part of Gem Glacier and The Garden Wall. 1911. #1:/Glacier National Park/stw00715 ID. Stanton, T.W. 715 Glacier National Park, Montana. Lower part of Gem Glacier. 1911. #1:/Glacier National Park/stw00716 ID. Stanton, T.W. 716 Glacier National Park, Montana. Overhanging ice wall at the foot (terminus?) of Gem Glacier. 1911. #1:/Glacier National Park/stw00717 ID. Stanton, T.W. 717 Glacier National Park, Montana. Part of The Garden Wall with the n‚v‚ field of Grinnell Glacier in the foreground. Mount Canon on the left. Heavens Peak in the right background. 1911. #1:/Glacier National Park/stw00723 ID. Stanton, T.W. 723 Glacier National Park, Montana. Mount Gould (photo stw00723) and The Garden Wall, viewed from the west slope. 1911. Photos stw00723 and stw00724 form a panorama. #1:/Glacier National Park/stw00724 ID. Stanton, T.W. 724 Glacier National Park, Montana. Mount Gould (photo stw00723) and The Garden Wall, viewed from the west slope. 1911. Photos stw00723 and stw00724 form a panorama. #1:/Glacier National Park/stw00725 ID. Stanton, T.W. 725 Glacier National Park, Montana. Kitchen tent, with cook standing by, at M.R. Campbell's camp in Granite Park. 1911. #1:/Glacier National Park/stw00726 ID. Stanton, T.W. 726 Glacier National Park, Montana.M.R. Campbell's party breaking trail on Ahern Pass. 1911. #1:/Glacier National Park/stw00727 ID. Stanton, T.W. 727 Glacier National Park, Montana. Belly River valley from the trail a little east of Ahern Pass. Cirque wall on the left is 2,500 feet high. Lake Helen at the base of the wall, but not visible. Elizabeth Lake in the valley at the right (photo stw00729). Mount Merritt just visible at left center (photo stw00728). Ahern Glacier on the left (photo 727). 1911. Plate 2-B, U.S. Geological Survey Bulletin 600. Photos stw00727, stw00728, stw00729 form a panorama. #1:/Glacier National Park/stw00728 ID. Stanton, T.W. 728 Glacier National Park, Montana. Belly River valley from the trail a little east of Ahern Pass. Cirque wall on the left is 2,500 feet high. Lake Helen at the base of the wall, but not visible. Elizabeth Lake in the valley at the right (photo stw00729). Mount Merritt just visible at left center (photo stw00728). Ahern Glacier on the left (photo 727). 1911. Plate 2-B, U.S. Geological Survey Bulletin 600. Photos stw00727, stw00728, stw00729 form a panorama. #1:/Glacier National Park/stw00729 ID. Stanton, T.W. 729 Glacier National Park, Montana. Belly River valley from the trail a little east of Ahern Pass. Cirque wall on the left is 2,500 feet high. Lake Helen at the base of the wall, but not visible. Elizabeth Lake in the valley at the right (photo stw00729). Mount Merritt just visible at left center (photo stw00728). Ahern Glacier on the left (photo 727). 1911. Plate 2-B, U.S. Geological Survey Bulletin 600. Photos stw00727, stw00728, stw00729 form a panorama. #1:/Glacier National Park/stw00730 ID. Stanton, T.W. 730 Glacier National Park, Montana. Summit of Ahern Pass. Man with horse near the left edge of snow. 1911. #1:/Teichert C. Collection/tc000014 ID. Teichert, C. 14 Underside of siltstone bed showing casts of large invertebrate tracks. The large straight track on the left is about 4 inches wide. Upper unit of Jerome Member. Gila County, Arizona. ca. 1960. #1:/Capulin Volcano National Monument/tde00005 ID. Trimble, D.E. 5cp Capulin Volcano National Monument, New Mexico. Capulin Mountain, a huge cinder cone which erupted between 4,000 and 10,000 years ago, rises more than 1,000 feet above its base. Photo by R.D. Miller. Figure 12, U.S. Geological Survey Bulletin 1493. #1:/Scotts Bluff National Monument/tde00009 ID. Trimble, D.E. 9cp Scotts Bluff National Monument, Nebraska. The buttes on the south side of the North Platte River valley are isolated by erosion from the High Plains in the background. The highest butte stands about 800 feet above the valley floor. Figure 16, U.S. Geological Survey Bulletin 1493. #1:/Devils Tower National Monument/tde00012 ID. Trimble, D.E. 12ct Devils Tower National Monument, Wyoming. Devils Tower. #1:/Badlands National Monument/tde00014 ID. Trimble, D.E. 14ct Badlands National Monument, South Dakota. Photo by W.H. Raymond III. Figure 26, U.S. Geological Survey Bulletin 1493. #1:/Theodore Roosevelt National Park/tde00017 ID. Trimble, D.E. 17cp Theodore Roosevelt National Memorial Park, North Dakota. Badlands of the Little Missouri River, looking northwest from Pained Canyon Overlook along Interstate Highway 94, west of Belfield, south unit of the park. Figure 27, U.S. Geological Survey Bulletin 1493; Figure 15 (black and white), U.S. Geological Survey Circular 798. #1:/Theodore Roosevelt National Memorial Park/tde00036 ID. Trimble, D.E. 36 Theodore Roosevelt National Memorial Park, North Dakota. Landslides on the south side of the Little Missouri River in the north unit of the park, viewed from River Bend Overlook. Killdeer Mountains are on the skyline in the left distance. Lower third of the valley wall on the opposite (south) side of the river is landslide complex. Circa 1979. Figure 12, U.S. Geological Survey Circular 798. #1:/Theodore Roosevelt National Park/tde00037 ID. Trimble, D.E. 37 Theodore Roosevelt National Memorial Park, North Dakota. Recent landslide south of the Little Missouri River, west of U.S. Highway 85. Circa 1979. Figure 13, U.S. Geological Survey Circular 798. #1:/Theodore Roosevelt National Park/tdeb0012 ID. Trimble, D.E. 12cp Theodore Roosevelt National Memorial Park, North Dakota. Rotated slump blocks in a huge landslide in the north unit of the park. The layering of the Fort Union Formation in the cliffs on the skyline, where the landslide originated, is horizontal. Figure 21, U.S. Geological Survey Bulletin 1493; Figure 14 (black and white), U.S. Geological Survey Circular 798. #1:/Thompson D.G. Collection/tdg00001 ID. Thompson, D.G. 1 Foothills and mountains south of Minneola Station, showing evenly-sloping surfaces, which may be due to faulting of alluvial slope, or may be volcanic flows. Looking W. of S. from 1.6 mile. E. of Minneola Station, T. 9 N.R. 2 E, Daggett Quadrangle, San Bernardino County, California. September 2, 1917. #1:/Thompson D.G. Collection/tdg00002 ID. Thompson, D.G. 2 Volcanic crater (Mount Pisgah), 4 miles N. of W. of Laric Station, T. 8 N., R. 6 E. This view was probably taken from old road south of crater looking north. Edge of lava field in middle distance is probably 10 feet high. Stagg Quadrangle, San Bernardino County, California. September 3, 1917. #1:/Thompson D.G. Collection/tdg00003 ID. Thompson, D.G. 3 Lava on northeast side of Mount Pisgah, T. 8 N., R. 6 E. Shows ropy nature of lava. Stagg Quadrangle, San Bernardino County, California. September 3, 1917. #1:/Thompson D.G. Collection/tdg00004 ID. Thompson, D.G. 4 Small caves in lava on northeast side of Mount Pisgah crater, due to lava stream flowing out from under surface crust. Summit of Cady Mountains, 10 miles northwest of Ludlow, in background. T. 8 N., R. 6 E., Stagg Quadrangle, San Bernardino County, California. September 3, 1917. #1:/Thompson D.G. Collection/tdg00005 ID. Thompson, D.G. 5 View of inner crater of Mount Pisgah volcano, from southwest side of crater rim. Material at lower left-hand corner forms a barrier across the western part of the original crater. Cady Mountains, northwest of Ludlow, in the distance.T. 8 N., R. 6 E., Stagg Quadrangle, San Bernardino County, California. September 3, 1917. Plate 32-B, U.S. Geological Survey Water Supply Paper 578. #1:/Thompson D.G. Collection/tdg00006 ID. Thompson, D.G. 6 View looking northeast from west side of main or outer crater of Mount Pisgah volcano. The depression (clay-covered) in foreground is caused by a late eruption forming a new wall of cone inside the original wall. The central crater is seen in middle distance at right. T. 8 N., R. 6 E., San Bernardino County, California. September 3, 1917. #1:/Thompson D.G. Collection/tdg00007 ID. Thompson, D.G. 7 Massive blocks of lava near southeast foot of Mount Pisgah crater. T. 8 N., R. 6 E., Stagg Quadrangle, San Bernardino County, California. September 3, 1917. #1:/Thompson D.G. Collection/tdg00008 ID. Thompson, D.G. 8 Lava tunnels or caves in lava field northeast of Mount Pisgah crater, due to lava flowing out from beneath solid crust. Cady Mountains in distance. Freight train on Santa Fe railroad in middle distance. T. 8 N., R. 6 E., Stagg Quadrangle, San Bernardino County, California. September 3, 1917. #1:/Thompson D.G. Collection/tdg00009 ID. Thompson, D.G. 9 Schoolhouse, sec. 15(?), T. 9 N., R. 3 E., 3 miles north of Newberry Springs (Wagner P.O.), looking east, low hills at west side of Cady Mountains in background. Daggett Quadrangle, San Bernardino County, California. September 4, 1917. #1:/Thompson D.G. Collection/tdg00010 ID. Thompson, D.G. 10 Left to right, respectively, panorama of Mohave River Valley at Camp Cady, looking north from edge of upland at a point about on east line of sec. 25, T. 10 N., R. 3 E. In foreground, old stockade of Camp Cady on terrace flat of river, behind which are mesquite and willow trees along river bottom. Beyond these are cliffs cut by river. Also shows level surface above river, supposed to be beds of Manix Lake. In left background are Calico Mountains, north of Daggett; in right background the Alvord Mountains(?). Daggett Quadrangle, San Bernardino County, California. September 5, 1917. #1:/Thompson D.G. Collection/tdg00013 ID. Thompson, D.G. 13 U.S.G.S. car number w-44, as used in desert watering place work. O.E. Meinzer on auto, David G. Thompson standing. San Bernardino County, California. September 5, 1917. #1:/Thompson D.G. Collection/tdg00014 ID. Thompson, D.G. 14 Car w-44, at same place as No. 13.W.C. Cauthen, assistant, and Thompson. September 5, 1917. #1:/Thompson D.G. Collection/tdg00015 ID. Thompson, D.G. 15 Looking south across Mohave River from bluffs opposite old Camp Cady, southeast of center of T. 10 N., R. 3 E., showing abundant tree growth in river bottom. Size of trees shown by comparison with man to left of center. Beyond at left is upland, old Manix Lake surface(?). In background is Newberry Mountain. Daggett Quadrangle, San Bernardino County, California. September 5, 1917. Plate 10, U.S. Geological Survey Water Supply Paper 577. #1:/Thompson D.G. Collection/tdg00016 ID. Thompson, D.G. 16 Left to right, respectively: Panorama, looking west and northwest from bluffs on north side of Mohave River, opposite old Camp Cady. Same location as No.15. Left view shows Mohave River bottom with dissected Manix Lake beds(?) in foreground. Farther to right is level surface, presumably old Manix Lake surface described by Buwalda. In background are Calico Mountains. Daggett Quadrangle, San Bernardino County, California. September 5, 1917. #1:/Thompson D.G. Collection/tdg00018 ID. Thompson, D.G. 18 Looking east down Mohave River from bluffs on north side of river opposite old Camp Cady. Same location as No. 15-17. Northwest end of Cady Mountains in background. Daggett Quadrangle, San Bernardino County, California. September 5, 1917. #1:/Thompson D.G. Collection/tdg00019 ID. Thompson, D.G. 19 Cliffs on north side of Mohave River opposite old Camp Cady, presumably Manix Lake beds described by Buwalda.T. 8 N., R. 6 E., Daggett Quadrangle, San Bernardino County, California. September 5, 1917. #1:/Thompson D.G. Collection/tdg00020 ID. Thompson, D.G. 20 Same as Nos. 10, 11, and 12, except that a slightly greater area is included. Panorama of Mohave River Valley at Camp Cady, looking north from edge of upland at a point about on east line of sec. 25, T. 10 N., R. 3 E. In foreground, old stockade of Camp Cady on terrace flat of river, behind which are mesquite and willow trees along river bottom. Beyond these are cliffs cut by river. Also shows level surface above river, supposed to be beds of Manix Lake. (see No. 17) In left background are Calico Mountains, north of Daggett; in right background the Alvord Mountains (?). Daggett Quadrangle, San Bernardino County, California. September 5,1917. #1:/Thompson D.G. Collection/tdg00023 ID. Thompson, D.G. 23 U.S.G.S. car w-44 stuck in sand of Mohave River bottom near Camp Cady. 0.E. Meinzer operating Pull-U-Out. Strips of canvas laid in front of wheels to give traction. San Bernardino County, California. September 5, 1917. #1:/Thompson D.G. Collection/tdg00024 ID. Thompson, D.G. 24 Coyote Well water sampling; probably near West cor. sec. 22, T. 11 N., R. 2 E., 14 miles northeast of Daggett, San Bernardino County, California. September 6, 1917. #1:/Thompson D.G. Collection/tdg00025 ID. Thompson, D.G. 25 Langford Well, probably in SW cor. sec. 14, T. 13 N., R. 3 E., 28 miles northeast of Daggett, San Bernardino County, California. September 7, 1917. #1:/Thompson D.G. Collection/tdg00026 ID. Thompson, D.G. 26 View looking into upper cave or tunnel. Located probably near west side sec. 22, T. 17 N., R. 5 E., about 22 miles northwest of Silver Lake, Crucero Quadrangle, San Bernardino County, California. September 7, 1917. #1:/Thompson D.G. Collection/tdg00027 ID. Thompson, D.G. 27 Mountains on east side south end of Death Valley, looking northest from Saratoga Springs, showing easterly dip of rocks. Age probably Cambrian. Sec. 2, T. 18 N., R. 5E., 32 miles northwest of Silver lake, San Bernardino County, California. Crucero quadrangle. Sept. 8, 1917. #1:/Thompson D.G. Collection/tdg00028 ID. Thompson, D.G. 28 San Bernardino Co., Calif. Saratoga liter hills (?), south end of South Death Valley. Looking southwest across Amergosa Valley from Saratoga Springs. Cave Springs Wash comes from Arawatz Mountains (in background) at extreme left (see No. 32).T. 18 N., R. 5 E., S.B.M., 32 miles northwest of Silver Lake, San Bernardino County, Calif. Crucero quadrangle. Sept. 8, 1917. #1:/Thompson D.G. Collection/tdg00029 ID. Thompson, D.G. 29 Saratoga Springs, looking east. Springs located in bunch of tules at left. Road to Silver Lake goes around low hill at right. Sec. 2, T. 18 N., R. 5 E., 32 miles northwest of Silver Lake, Crucero Quadrangle, San Bernardino County, California. September 8, 1917. #1:/Thompson D.G. Collection/tdg00030 ID. Thompson, D.G. 30 Ponds north of Saratoga Springs. San Bernardino County, California. 1917. #1:/Thompson D.G. Collection/tdg00031 ID. Thompson, D.G. 31 Sand dunes against southwest flanks of mountains in southwest part of T. 19 N., R. 6 E., 3 miles east of Saratoga Springs, or 30 miles northwest of Silver Lake, California. Crucero Quadrangle, San Bernardino County, California. September 8, 1917. #1:/Thompson D.G. Collection/tdg00032 ID. Thompson, D.G. 32 Alluvial fan at mouth of Cave Springs Wash; looking south across valley of Amargosa River, from low hill one-half mile southeast of Saratoga Springs.T. 18 N., R. 5 E. Arawatz Mountains in background; hills in right background are up-faulted clays (see No. 28) White areas in middle distance are salt-crusted dry channels of Amargosa River. 31 miles northwest of Silver Lake, Crucero Quadrangle, San Bernardino County, California. September 8, 1917. #1:/Thompson D.G. Collection/tdg00033 ID. Thompson, D.G. 33 Panorama. Part of Silver Lake playa, in T. 14 and 15 N., R. 8 E., from limestone hill 1 mile north of Silver Lake Station (Tonopah & Tidewater Railway), looking south and southwest. At left is long alluvial slope to east of lake, with southwest edge of Shadow Mountains in the distance. Town of Silver Lake in middle distance. White diagonal line across lake to right of town is old grade of T. & T. Ry., abandoned after flood of 1916 (see No. 41). On left the playa lies close to foot of mountains. Wave-cut cliffs seen at left. Playa is black, dry, and mud-cracked (see No. 43, etc.). In foreground is wave-cut terrace shown in No. 39-A. Crucero Quadrangle, San Bernardino County, California. September 8, 1917. #1:/Thompson D.G. Collection/tdg00034 ID. Thompson, D.G. 34 Panorama. Part of Silver Lake playa, in T. 14 and 15 N., R. 8 E., from limestone hill 1 mile north of Silver Lake Station (Tonopah & Tidewater Railway), looking south and southwest. At left is long alluvial slope to east of lake, with southwest edge of Shadow Mountains in the distance. Town of Silver Lake in middle distance. White diagonal line across lake to right of town is old grade of T. & T. Railroad., abandoned after flood of 1916 (see No. 41). On left the playa lies close to foot of mountains. Wave-cut cliffs seen at left. Playa is black, dry, and mud-cracked (see No. 43, etc.). In foreground is wave-cut terrace shown in No. 39-A. Crucero Quadrangle, San Bernardino County, California. September 8, 1917. #1:/Thompson D.G. Collection/tdg00035 ID. Thompson, D.G. 35 Panorama. Part of Silver Lake playa, in T. 14 and 15 N., R. 8 E., from limestone hill 1 mile north of Silver Lake Station (Tonopah & Tidewater Railway), looking south and southwest. At left is long alluvial slope to east of lake, with southwest edge of Shadow Mountains in the distance. Town of Silver Lake in middle distance. White diagonal line across lake to right of town is old grade of T. & T. Railroad., abandoned after flood of 1916 (see No. 41). On left the playa lies close to foot of mountains. Wave-cut cliffs seen at left. Playa is black, dry, and mud-cracked (see No. 43, etc.). In foreground is wave-cut terrace shown in No. 39-A. Crucero Quadrangle, San Bernardino County, California. September 8, 1917. #1:/Thompson D.G. Collection/tdg00036 ID. Thompson, D.G. 36 Panorama, overlapping No. 35 at left. Looking west and northwest across Silver Lake playa from limestone point 1 mile north of town of Silver Lake, T. 15 N., R. 8 E. At right is low rock barrier separating Silver Lake from valley which drains to Death Valley; an old outlet is shown by a small, dark spot in lowest point of divide, just to left of black hill at extreme right. Between this and edge of playa are old strand lines from an inch to several inches high, marked by dead vegetation. Crucero Quadrangle, San Bernardino County, California. September 8, 1917. Plate 31-B, U.S. Geological Survey Water Supply Paper 578. #1:/Thompson D.G. Collection/tdg00040 ID. Thompson, D.G. 40 Town of Silver Lake, from southwest. During flood of 1916 water stood above bottom of barn at extreme left. In right background is west end of Shadow Mountains, which do not reach down to hills at northeast end of Silver Lake playa (beyond barn at right).T. 15 N., R. 8 E., Crucero Quadrangle, San Bernardino County, California. September 9. 1917. #1:/Thompson D.G. Collection/tdg00041 ID. Thompson, D.G. 41 Abandoned track of Tonopah & Tidewater Railway across Silver Lake playa, looking south from near Silver Lake Station. Track was lifted from grade by flood waters in January, 1916.T. 15 N., R. 8 E., San Bernardino County California. September 9, 1917. #1:/Thompson D.G. Collection/tdg00042 ID. Thompson, D.G. 42 Mud-cracked surface of Silver Lake playa. Town of Silver Lake in background. Abandoned railroad grade in middle distance.T. 15 N., R. 8 E., Crucero Quadrangle, San Bernardino County, California. September 9, 1917. #1:/Thompson D.G. Collection/tdg00043 ID. Thompson, D.G. 43 "Close-up" of mud-cracks on Silver Lake playa near town of Silver Lake, T. 15 N., R. 8 E. Round object in center is a watch. San Bernardino County, California. September 1917? #1:/Thompson D.G. Collection/tdg00044 ID. Thompson, D.G. 44 Tertiary beds containing strontianite layers, located probably in sec. 26 or 27, T. 11 N., R. 1 W., 10 miles east of north from Barstow. The two men are standing at outcrop of strontianite bed which rises diagonally to the right. Crucero Quadrangle, San Bernardino County, California. September 15, 1917. #1:/Thompson D.G. Collection/tdg00045 ID. Thompson, D.G. 45 Panoramic view of tilted Tertiary beds exposed in canyons on south side of volcanic knob, probably in sec. 26 or 27, T. 11 N., R. 1 W., 9 miles east of north of Barstow, Crucero Quadrangle, San Bernardino County, California. September 15, 1917. #1:/Thompson D.G. Collection/tdg00047 ID. Thompson, D.G. 47 Crumpled sandstone (Tertiary?) at mouth of Wall Street Canyon, Calico Mountains, probably in sec. 15, T. 10 N., R. 1 E., 6 miles north of Daggett, Daggett Quadrangle, San Bernardino County, California. September 18, 1917. #1:/Thompson D.G. Collection/tdg00048 ID. Thompson, D.G. 48 Looking north up Wall Street Canyon, shoring remains of abandoned town of West Calico, Calico Mountains, T. 10 N., R. 1 E., 6 miles north of Daggett, Daggett Quadrangle, San Bernardino County, California. September 18, 1917. Plate 3-A, U.S. Geological Survey Water Supply Paper 578. #1:/Thompson D.G. Collection/tdg00049 ID. Thompson, D.G. 49 Hieroglyphics on small, isolated rock mass on north side of Mohave River, about 2 miles north of Daggett, probably in sec.10, T. 9 N., R. 1 E., Daggett Quadrangle, San Bernardino County, California. September 18, 1917. #1:/Thompson D.G. Collection/tdg00050 ID. Thompson, D.G. 50 Giant yuccas, or Joshua trees, on north slope of mountain north of Barstow, T.10 N., R. 1 W., Hinkley Quadrangle, San Bernardino County, California. September 19, 1917. Plate 14-B, U.S. Geological Survey Water Supply Paper 490-B. #1:/Thompson D.G. Collection/tdg00051 ID. Thompson, D.G. 51 "Dry washer" for separating placer gold, at the old Coolgardio camp, sec. 32, T. 32 S., R 46 E., 14 miles north of Barstow, Searles Lake Quadrangle, San Bernardino County, California. September 19, 1917. #1:/Thompson D.G. Collection/tdg00052 ID. Thompson, D.G. 52 Steep south face of lava flow, at old Murphy Well, 3 miles northwest of old Coolgardie camp, southwest cor. sec 24, T. 32 S., R.45 E., 16 miles north and west of Barstow. Searles Lake Quadrangle, San Bernardino County, California. September 19, 1917. #1:/Thompson D.G. Collection/tdg00053 ID. Thompson, D.G. 53 Panoramic view of Eagle Crags (Tertiary volcanics and sediments?), looking north from hill north of Indian Spring, south-central part of T. 29 S., R. 46 E., 35 miles north of Barstow, Searles Lake Quadrangle, San Bernardino County, California. September 22, 1917. #1:/Thompson D.G. Collection/tdg00055 ID. Thompson, D.G. 55 Conglomerate (Tertiary?) .2 mile east of Indian Springs, northwest cor. sec. 3, T. 30 S., R. 46 E., 34 miles north of Barstow, Searles Lake Quadrangle, San Bernardino County, California. September 22, 1917 #1:/Thompson D.G. Collection/tdg00056 ID. Thompson, D.G. 56 Near view of Indian Springs, sec. 4, T. 30 S., R. 46 E., 34 miles north of Barstow. Eagle Crags in background. Searles Lake Quadrangle, San Bernardino County, California. September 22, 1917. Plate 4-B, U.S. Geological Survey Water Supply Paper 490-B and plate 15-B, U.S. Geological Survey Water Supply Paper 578. #1:/Thompson D.G. Collection/tdg00057 ID. Thompson, D.G. 57 Looking toward Indian Spring from south of road. Spring is hidden in bushes 50 feet from road which shows in foreground. Spring is marked by a stick (at left of center). Sec. 4, T. 30 S., R. 46 E., 34 miles north of Barstow, Searles Lake Quadrangle, San Bernardino County, California. September 22, 1917. Plate IV-A, U.S. Geological Survey Water Supply Paper 490-B. #1:/Thompson D.G. Collection/tdg00058 ID. Thompson, D.G. 58 Signposts erected by Automobile Club of Southern California, at old Copper City, SE. cor. sec. 6, T. 30 S., R.46 E., 25 miles east of Randsburg, Searles Lake Quadrangle, San Bernardino County, California. September 22, 1917. #1:/Thompson D.G. Collection/tdg00059 ID. Thompson, D.G. 59 Exfoliation of large granite boulders (erosion remnants), west of Salt Wells Valley road to Trona, probably in southwest part Sec. 6, T. 28 S., R. 4l E. 12 miles north and east of Randsburg. Summit Range in background. Searles Lake Quadrangle, San Bernardino County, California. September 24, 1917. #1:/Thompson D.G. Collection/tdg00060 ID. Thompson, D.G. 60 Granite knobs at summit of range northeast of Searles station, 15 miles north and east of Randsburg. San Bernardino County, California. September 1917? #1:/Thompson D.G. Collection/tdg00061 ID. Thompson, D.G. 61 Panoramic view of Salt Wells Valley, from summit 5 miles southwest of Salt Wells. At left are low hills separating Salt Wells Valley from China Lake. To right of center, very faint, is Searles Lake flat, with Slate Range in background at right, and Argus Range in background at left of center.T. 26 S., R. 41 and 42 E., 15-20 miles northeast of Randsburg, Searles Lake quadrangle, San Bernardino County, California. September 24, 1917. #1:/Thompson D.G. Collection/tdg00065 ID. Thompson, D.G. 65 Tufa, deposited by ancient Searles Lake, east of road about 2 miles south of Salt Wells, NE cor.T. 27 S., R. 41 E., 20 miles northeast of Randsburg, Searles Lake Quadrangle, San Bernardino County, California. September 24, 1917. #1:/Thompson D.G. Collection/tdg00066 ID. Thompson, D.G. 66 Grave on Valley Wells road between Trona and Randsburg,, 1.5 miles southwest of Valley Wells. Inscription says: "Died on third (or "of thirst"?), Feb. 1883, unknown". Some reports say this is a "fake" for the edification of travelers. Near southwest cor.T. 26 S., R. 41 E., 20 miles northeast of Randsburg. In left background is tufa hill shown in No. 67. Randsburg Quadrangle, San Bernardino County, California. September 24, 1917. #1:/Thompson D.G. Collection/tdg00067 ID. Thompson, D.G. 67 Tufa hill, 300 yards east of road, about 1.5 miles southwest of Valley Wells, 20 miles northwest of Randsburg. Searles Lake Quadrangle, San Bernardino County, California. September 24, 1917. #1:/Thompson D.G. Collection/tdg00068 ID. Thompson, D.G. 68 Near view of tufa shown in No. 67. San Bernardino County, California. September 1917? #1:/Thompson D.G. Collection/tdg00069 ID. Thompson, D.G. 69 Looking northeast across Searles Lake from near junction of Salt Wells Canyon and Searles Valley roads, 4 miles south of Trona. Slate Range in distance. NW cor. sec. 18(?), T. 26 S., R. 43 E., Searles Lake Quadrangle, San Bernardino County, California. September 25, 1917. #1:/Thompson D.G. Collection/tdg00070 ID. Thompson, D.G. 70 On Searles Lake salt flat at Trona Corporation pumping plant, 4 miles from Trona. Left to right, Cauthens, asst., U.S.G.S., Klamt, supt. of corporation, and two officials of S.P. Railway. At left is pipeline for carrying brine to reduction plant. Searles Lake Quadrangle, San Bernardino County, California. September 25, 1917. #1:/Thompson D.G. Collection/tdg00071 ID. Thompson, D.G. 71 Southeast end of Searles Lake flat; in background at left is Slate Range, and farther to right is low divide over which Searles Lake drained to Panamint basin.T. 27 S., R.4.N., 30 miles northeast of Randsburg, Searles Lake Quadrangle, San Bernardino County, California. September 26, 1917. #1:/Thompson D.G. Collection/tdg00079 ID. Thompson, D.G. 79 Looking east through Wingate Pass from lava hill in center of extreme west end of pass, one-half mile southwest of B.M. 1977. Southwest part of T. 25 S, R. 46 E., 40 miles northeast of Randsburg, Searles Lake Quadrangle, San Bernardino County, California. September 27, 1917. #1:/Thompson D.G. Collection/tdg00080 ID. Thompson, D.G. 80 View of tufa (white) plastered against conglomerate in channel east of lava hill, southwest of B.M.1977, Wingate Pass, 40 miles northeast of Randsburg, Searles Lake Quadrangle, San Bernardino County, California. September 27, 1917. #1:/Thompson D.G. Collection/tdg00081 ID. Thompson, D.G. 81 Exposure in wash in Wingate Pass, a short distance east of lava hill south of B.M. 1977. A very thin layer of lava boulders at top, below which is a coarse conglomerate, and in lower half is a sandy gravel. Southwest part of T. 25 S., R. 46 E., 40 miles northeast of Randsburg, Searles Lake quadrangle, San Bernardino County, California. September 27, 1917. #1:/Thompson D.G. Collection/tdg00082 ID. Thompson, D.G. 82 Hidden Spring under willow tree. Located approximately in sec. 23(?), T. 26 S., R. 47 E., 45 miles northeast of Randsburg, Crucero Quadrangle, San Bernardino County, California. September 28, 1917. #1:/Thompson D.G. Collection/tdg00084 ID. Thompson, D.G. 84 Left to right, respectively. Panoramic view of Crystal Hills, looking approximately west. Hill at extreme left of No. 85 is volcanic. At extreme right of No. 85, behind tractor, is epsom prospect in clay, with crushed-rock fragments first to left.T. 25 S., R. 47 E., 48 miles northeast of Randsburg, Crucero Quadrangle, San Bernardino County, California. September 28, 1918. #1:/Thompson D.G. Collection/tdg00087 ID. Thompson, D.G. 87 View of Crystal Hills Wash, northeast of epsom prospect, showing at right of center clay hills lying on darker igneous rock.T. 25 S., R. 47 E. 48 miles northeast of Randsburg, Crucero Quadrangle, San Bernardino County, California. September 28, 1918. #1:/Thompson D.G. Collection/tdg00088 ID. Thompson, D.G. 88 Interrupted profile of alluvial slope on southeast front of E1 Paso Mountains, probably due to faulting, looking north from one-fourth mile southwest of Garlock, sec. 29, T. 29 S., R. 35 E., Searles Lake Quadrangle, Kern County, California. October 2, 1917. #1:/Thompson D.G. Collection/tdg00089 ID. Thompson, D.G. 89 Ledge of quartzitic-like rock, in canyon cutting through Lane Mountain, southeast point of T. 32 S., R. 47 E., 15 miles north and east of Barstow, San Bernardino County, California. October 12, 1917. #1:/Thompson D.G. Collection/tdg00090 ID. Thompson, D.G. 90 These three views are panoramic, but they do not quite join. Looking northeast from hill north of Goldstone Mine. At extreme right in distance is a dry lake. In right views is a large, recent(?) lava flow covering northeast part of T. 14 N., R. 1 E., 25 miles north and east of Barstow, San Bernardino County, California. October 13, 1917. #1:/Thompson D.G. Collection/tdg00093 ID. Thompson, D.G. 93 Junction of roads .2 mile east of Indian Spring. Road to Leach Point goes behind large rock; to right to Barstow; to left to Copper City. Makeshift sign near man (see No.s 111 and 142F for new sign). Rock is conglomerate, sandstone at bottom (Tertiary?). Northeast 1/4 sec. 3, T. 30 S., R. 46 E., 34 miles north of Barstow, Searles Lake quadrangle, San Bernardino County, California. October 13, 1917. #1:/Thompson D.G. Collection/tdg00094 ID. Thompson, D.G. 94 Leach Spring (under willow). Sec. 23, T. 17 N., R. 1 E., 45 miles north and east of Barstow, Crucero Quadrangle, San Bernardino County, California. October l4, 1917. #1:/Thompson D.G. Collection/tdg00095 ID. Thompson, D.G. 95 Granite back of Leach Spring. San Bernardino County, California. [October 1917? #1:/Thompson D.G. Collection/tdg00096 ID. Thompson, D.G. 96 Gypsum-bearing beds (Quaternary?) in wash one mile south of Owlhead manganese mine, sec. 21 (?), T. 18 N., R. 3 E., 45 miles northwest of Silver Lake, Crucero Quadrangle, San Bernardino County, California. October 15, 1917. #1:/Thompson D.G. Collection/tdg00097 ID. Thompson, D.G. 97 Washed-out road on Owlhead Wash, about 40 miles northwest of Silver Lake, Crucero Quadrangle, San Bernardino County, California. October 15, 1917. #1:/Thompson D.G. Collection/tdg00098 ID. Thompson, D.G. 98 Alluvial slope on north side of Avawatz Mountains (in distance), about 25 miles northwest of Silver Lake, Crucero Quadrangle, San Bernardino County, California. October 16, 1917. #1:/Thompson D.G. Collection/tdg00099 ID. Thompson, D.G. 99 Vertical beds (quartzite, limestone, and shale) in mouth of Sheep Creek Canyon, probably sec. 5, T. 17 N., R. 6 E., 22 miles northwest of Silver Lake, Crucero Quadrangle, San Bernardino County, California. October 16, 1917. #1:/Thompson D.G. Collection/tdg00100 ID. Thompson, D.G. 100 Panoramic view (slight break between Nos. 102 and 103), looking north down Sheep Creek Canyon from top of old fan. Shows especially old conglomerate (Pleistocene?) now deeply dissected. White beds in foreground are gypsiferous, probably Tertiary. Mass on far side of canyon at right is probably mostly granite. In right distance of No. 102, just beyond vertical white mass, are rocks shown in No. 99. Northwest part of T. 17 N., R. 6 E., 22 miles northwest of Silver Lake, Crucero Quadrangle, San Bernardino County, California. October 16, 1917. #1:/Thompson D.G. Collection/tdg00105 ID. Thompson, D.G. 105 View of narrow canyon in granite. This is canyon shown in right foreground of No. 102, a branch of Sheep Creek Canyon. 22 miles northwest of Silver Lake, Crucero Quadrangle, San Bernardino County, California. October 16, 1917. #1:/Thompson D.G. Collection/tdg00106 ID. Thompson, D.G. 106 Alluvial gravels (Pleistocene?) in Seep Creek Canyon, overlying disintegrated granite (the white rock). This is the ridge exposed in right foreground of No. 102. 22 miles northwest of Silver Lake, Crucero Quadrangle, San Bernardino County, California. October 16, 1917. #1:/Thompson D.G. Collection/tdg00107 ID. Thompson, D.G. 107 Branch of Sheep Creek Canyon, cut in alluvial gravels. Same as shown in left-middle distance of No. 103. 22 miles northwest of Silver Lake, Crucero Quadrangle, San Bernardino County, California. October 16, 1917. #1:/Thompson D.G. Collection/tdg00108 ID. Thompson, D.G. 108 Panoramic view looking north toward Death Valley from limestone hill on Cave Springs Wash road, about the south side of sec. 33, T. 17, N., R. 5 E. At left in distance are Owls Head Mountains; at right in distance is the Amargosa Range. Break in mountains in distance in No. 109 is entrance to Death Valley proper. Hills to right in No. 109 are Saratoga niter hills. Saratoga Springs located at left-hand point of dark, low mountain on north side of Amargosa Valley in No. 110. In foreground of Nos. 109, 110, and 111 is Cave Springs Wash. 25 miles northwest of Silver Lake, Crucero Quadrangle, San Bernardino County, California. [October 1917? #1:/Thompson D.G. Collection/tdg00112 ID. Thompson, D.G. 112 Looking south of Cave Springs Wash, toward north side of western part of Avaratz Mountains, from limestone hill, approximately on south side of sec. 33, T. 17 N., R. 5 E. In foreground is Cave Springs Wash, cutting diagonally across alluvial slope which dips to right (this slope has same dip back of mountain in left foreground). Low hills in middle distance of No. 113 probably mark a fault line. Denning Springs road goes diagonally down slope toward right. 25 miles north of Silver Lake, Crucero Quadrangle, San Bernardino County, California. Oct 20, 1917. #1:/Thompson D.G. Collection/tdg00115 ID. Thompson, D.G. 115 Looking east along limestone hill south side of sec. 33, T. 17 N., R. 5 E., from which Nos. 108 to ll4 were taken. Cave Springs Wash seen at base of hill on both sides. Nos. 108 to 115 form an almost complete circle. San Bernardino County, California. [October 1917? #1:/Thompson D.G. Collection/tdg00116 ID. Thompson, D.G. 116 Looking north across north end of Soda Lake playa 1 mile southwest of Baker station. Black irregular line in middle distance of playa marks beginning of channel leading to Silver Lake playa. At left is suggestion of wave-cut cliff at base of mountains. Shadow Mountains in background. Northeast cor. of T. 13 N., R. 8 E., Crucero quadrangle, San Bernardino County, California. October 22, 1917. #1:/Thompson D.G. Collection/tdg00117 ID. Thompson, D.G. 117 Panorama looking southeast from Silver Lake-Good Spring road near east line of T. 16 N., R. 10 E., showing fault-like cliff, which is, however, probably the edge of a lava flow and probable crater. Also shows typical landscape with Joshua trees. 15 miles northeast of Silver Lake, Ivanpah Qaudrangle, San Bernardino County, California. October 24, 1917. #1:/Thompson D.G. Collection/tdg00118 ID. Thompson, D.G. 118 Panorama looking southeast from Silver Lake-Good Spring road near east line of T. 16 N., R. 10 E., showing fault-like cliff, which is, however, probably the edge of a lava flow and probable crater. Also shows typical landscape with Joshua trees. 15 miles northeast of Silver Lake, Ivanpah Qaudrangle, San Bernardino County, California. October 24, 1917. #1:/Thompson D.G. Collection/tdg00119 ID. Thompson, D.G. 119 Survey auto in canyon on northeast side of Clark Mountain, 17 miles northwest of Nipton, California. Road was very steep, and washed out; it was necessary to build a road to get auto through. San Bernardino County, California. October 26, 1917. #1:/Thompson D.G. Collection/tdg00120 ID. Thompson, D.G. 120 Ore-loading platform, burro ore train and ore wagons at Mohawk mine, 19 miles west of Nipton, Ivanpah Quadrangle, San Bernardino County, California. October 27, 1917. #1:/Thompson D.G. Collection/tdg00121 ID. Thompson, D.G. 121 Panoramic view. South face of lava flow (Tertiary?), in sec. 17 and 18, T. 15 N., R. 11 E., and west nearly to Halloran Spring, from knob near east end. In left-hand view, light areas a short distance below top of cliff are granite underlying the lava. 15 miles east of Silver Lake, Ivanpah Quadrangle, San Bernardino County, California. October 28, 1917. #1:/Thompson D.G. Collection/tdg00125 ID. Thompson, D.G. 125 Colorado River, narrows, about 2 miles south of Santa Fe Railroad crossing at Topock. Taken from California side, 200 feet south of U.S.G.S. stream-gaging station, Needles quadrangle, San Bernardino County, California. November 11, 1917. #1:/Thompson D.G. Collection/tdg00126 ID. Thompson, D.G. 126 Colorado River at entrance to narrows, 2 miles south of Topock, Arizona, U.S.G.S. gaging station on canyon wall at right. Needles Quadrangle, Mohave County, Arizona. November 11, 1917. #1:/Thompson D.G. Collection/tdg00127 ID. Thompson, D.G. 127 Panorama of Colorado River, from a point about one-half mile west of Topock, Arizona, in sec. 8, T. 7 N., R. 24 E., 10 miles southeast of Needles, Needles Quadrangle, San Bernardino County, California. November 11, 1917. #1:/Thompson D.G. Collection/tdg00128 ID. Thompson, D.G. 128 Panorama of Colorado River, from a point about one-half mile west of Topock, Arizona, in sec. 8, T. 7 N., R. 24 E., 10 miles southeast of Needles, Needles Quadrangle, San Bernardino County, California. November 11, 1917. #1:/Thompson D.G. Collection/tdg00130 ID. Thompson, D.G. 130 Terrace along northeast slope of mountains, a short distance west of bridge over Colorado River at Topock. Sec. 8, T. 7 N., R. 24 E., 10 miles southeast of Needles. Needles Quadrangle, San Bernardino County, California. November 11, 1917. #1:/Thompson D.G. Collection/tdg00131 ID. Thompson, D.G. 131 "The Mystic Maze." Sec. 8, T. 7 N., R. 24 E. Piles of stone raked into rows by early Indians, which intersect at various angles. Said to have been used in death rites by tribes older than the present ones. 10 miles southeast of Needles. Needles Quadrangle, San Bernardino County, California. November 11, 1917. Plate 30-B, U.S. Geological Survey Water Supply Paper 578. #1:/Thompson D.G. Collection/tdg00132 ID. Thompson, D.G. 132 Castellated peaks of Turtle Mountains near Carsons camp, T. 4 N., R. 20 E., 30 miles southwest of Needles, Vidal Quadrangle, San Bernardino County, California. November 13, 1917. #1:/Thompson D.G. Collection/tdg00133 ID. Thompson, D.G. 133 Desert pavement, northeast slope of Turtle Mountains, T. 15 N., R. 21 E., about 25 miles southwest of Needles, Vidal Quadrangle, San Bernardino, County, California. November 13, 1917. #1:/Thompson D.G. Collection/tdg00134 ID. Thompson, D.G. 134 Lake beds on northwest part of Danby Dry Lake, cut by recent erosion. Puffed surface, probably because of salts precipitated in clay. Probably in sec. 18, T. 18 N., R. 2 E. 20 miles northeast of Blythe Junction, Kilbeck's Quadrangle, San Bernardino County, California. November 18, 1917. Plate 34-B, U.S. Geological Survey Water Supply Paper 578. #1:/Thompson D.G. Collection/tdg00135 ID. Thompson, D.G. 135 San Bernardino Co., California. Panoramic view of north face of San Bernardino Mountains, looking west and northwest, at Cushenberry ranch, sec. 34, T. 3 N., E. 1 S., S.B.M. At left, low terraces are probably due to faulting of alluvial fan. In middle is Cushenberry ranch, with Victorvilie-Bear Lake road in front. In right distance is Lucerne Valley, with the Granite Mountains in distance. About 25 miles east and south of Victorville, Calif., San Gorgonio quadrangle, Dec. 8, 1917. #1:/Thompson D.G. Collection/tdg00136 ID. Thompson, D.G. 136 San Bernardino Co., California. Panoramic view of north face of San Bernardino Mountains, looking west and northwest, at Cushenberry ranch, sec. 34, T. 3 N., E. 1 S., S.B.M. At left, low terraces are probably due to faulting of alluvial fan. In middle is Cushenberry ranch, with Victorvilie-Bear Lake road in front. In right distance is Lucerne Valley, with the Granite Mountains in distance. About 25 miles east and south of Victorville, Calif., San Gorgonio quadrangle, Dec. 8, 1917. #1:/Thompson D.G. Collection/tdg00137 ID. Thompson, D.G. 137 San Bernardino Co., California. Panoramic view of north face of San Bernardino Mountains, looking west and northwest, at Cushenberry ranch, sec. 34, T. 3 N., E. 1 S., S.B.M. At left, low terraces are probably due to faulting of alluvial fan. In middle is Cushenberry ranch, with Victorvilie-Bear Lake road in front. In right distance is Lucerne Valley, with the Granite Mountains in distance. About 25 miles east and south of Victorville, Calif., San Gorgonio quadrangle, Dec. 8, 1917. #1:/Thompson D.G. Collection/tdg00139 ID. Thompson, D.G. 139 Kern County, Calif. Flowing Wells, sec. 27, T. 9 N.,R. 9 W., S.B.H. 6 miles southeast of Muroc, Kern County, Calif. Kramer quadrangle (unsurveyed). Dec. 13 1917. #1:/Thompson D.G. Collection/tdg00140 ID. Thompson, D.G. 140 Rogers Dry Lake, looking west from edge of lake, west of Flowing Wells, sec. 27, T. 19 N., R. 9 W., 6 miles southeast of Muroc, Kramer Quadrangle, Kern County, California. December 13, 1917. #1:/Thompson D.G. Collection/tdg00141 ID. Thompson, D.G. 141 First U.S.G.S. signpost erected in California, .2 miles east of Indian Spring, sec. 4, T. 30 S., R. 46 E., 34 miles north of Barstow, Searles Lake Quadrangle, San Bernardino County, California. December 17, 1917. #1:/Thompson D.G. Collection/tdg00142 ID. Thompson, D.G. 142 Old and new signposts, .2 mile east of Indian Spring, 34 miles north of Barstow, San Bernardino County, California. December 17, 1917. #1:/Thompson D.G. Collection/tdg00143 ID. Thompson, D.G. 143 Monument dedicated in December, 1917 to the early pioneers of California, and marking end of Santa Fe and Salt Lake trails, on National Old Trails road, about one-half mile north of Cajon station, or 19 miles north of San Bernardino. Sec. 24, T. 3 N., R. 6 W. Hesperia Quadrangle, San Bernardino County, California. December 28, 1917. #1:/Thompson D.G. Collection/tdg00144 ID. Thompson, D.G. 144 Boring holes in signpost with aid of vise and chain drill in Salt Wells Canyon. In background to left of auto white mass on granite is remains of deposits laid by stream from Owens Lake. 10 miles south of Trona, Searles Lake Quadrangle, San Bernardino County, California. January 5, 1918. #1:/Thompson D.G. Collection/tdg00145 ID. Thompson, D.G. 145 Sedimentary series, probably volcanics and sandstone, sec. 11, T. 29, S., R. 44 E., 25 miles east of Randsburg, Searles Lake quadrangle, San Bernardino County, California. January 10, 1918. #1:/Thompson D.G. Collection/tdg00146 ID. Thompson, D.G. 146 View south across valley west of Leach Point, from road to Hidden Spring, northwest cor.T. 17 N., R. 1 E., 43 miles northeast of Randsburg, Crucero Quadrangle, San Bernardino County, California. January 12, 1918. #1:/Thompson D.G. Collection/tdg00147 ID. Thompson, D.G. 147 (see No. 179) U.S.G.S. sign plates on county post, at junction of Cave Springs-Barstow and Silver Lake-Leach Spring road, 23 miles northwest of Silver Lake, California, sec. 8, T. 16 N., R. 5 E. Enlargement of No. 147 retouched to bring out lettering on sign plates. Crucero Quadrangle, San Bernardino County, California. January 16, 1918. Plate 3, U.S. Geological Survey Water Supply Paper 490-B. #1:/Thompson D.G. Collection/tdg00148 ID. Thompson, D.G. 148 Boring holes in county post already set. At branch road to Desert King Spring, probably in sec. 19, T. 17 N., R. 3 E., 36 miles west and north of Silver Lake, Crucero Quadrangle, San Bernardino County, California. January 16, 1918. #1:/Thompson D.G. Collection/tdg00149 ID. Thompson, D.G. 149 Junction of Silver Lake, Owl Holes and Death Valley road, showing makeshift signs, 2 miles west of Saratoga Springs, or 35 miles northwest of Silver Lake, Crucero Quadrangle, San Bernardino County, California. 1918? #1:/Thompson D.G. Collection/tdg00150 ID. Thompson, D.G. 150 U.S.G.S. signpost at same road junction as in No.149. Old sign is shown at left. San Bernardino County, California. 1918? #1:/Thompson D.G. Collection/tdg00151 ID. Thompson, D.G. 151 View of Tertiary beds in Saratoga niter hills, south of Owl Holes-Silver Lake-Death Valley road junction, probably in sec. 9, T. 18 N., R. 5 E., 35 miles northwest of Silver Lake. Gravels on terrace in foreground have been washed from above Tertiary beds. Probably same area as shown on p. 23, California Mining Bureau Bull. No. 24, then considered to be a lake beach. Crucero Quadrangle, San Bernardino County, California. January 19, 1917. #1:/Thompson D.G. Collection/tdg00152 ID. Thompson, D.G. 152 Sawtooth Range, from north, 17 miles south of Needles, in east-central part of T. 6 N., R. 22 E. Needles Quadrangle, San Bernardino County, California. February 4, 1918. #1:/Thompson D.G. Collection/tdg00153 ID. Thompson, D.G. 153 Fan-like spring deposit (whitish, in left middle distance), formed from Paradise Springs, with springs at background, left of center at foot of Hills. Probably in sec. 7, T. 12 N., R. 2 E., 20 miles north and east of Barstow, Crucero Quadrangle, San Bernardino County, California. February 12, 1918. #1:/Thompson D.G. Collection/tdg00154 ID. Thompson, D.G. 154 Northwest face of Tiefort Mountain, showing prominent alluvial fan; southwest part of T. 14 N., R. 4 E., 36 miles northeast of Barstow, Crucero Quadrangle, San Bernardino County, California. January 13, 1918. #1:/Thompson D.G. Collection/tdg00158 ID. Thompson, D.G. 158 Flowing well drilled by Guarantee Development County, one-half mile east of Gage, Sec. 2, T. 21 N., R. 24 W., Ellis County, Oklahoma. 1918? Plate 4-A, U.S. Geological Survey Water Supply Paper 500. #1:/Thompson D.G. Collection/tdg00159 ID. Thompson, D.G. 159 Near view of flowing well, one-half mile east of Gage, Oklahoma. C.H. Holmes (left), and C.J. Minton (right) leading members of Guarantee Development Co. Flow from 3-inch pipe estimated to be at least 500 gallons per minute. Ellis County, Okla. September 20, 1918. Plate 4-B, U.S. Geological Survey Water Supply Paper 500. #1:/Thompson D.G. Collection/tdg00160 ID. Thompson, D.G. 160 Near view of flowing well one-half mile east of Gage, Oklahoma. Ellis County, Okla. September 20, 1918. #1:/Thompson D.G. Collection/tdg00161 ID. Thompson, D.G. 161 Rolling topography 9 miles south of Gage, sec. 21, T. 20 N., R. 24 W. Distant hills capped by Tertiary sandstone. Ellis County, Oklahoma. September 17, 1918. #1:/Thompson D.G. Collection/tdg00162 ID. Thompson, D.G. 162 Tertiary sandstone capping divide, sec. 20, T. 20 N., R. 24 W., 9 miles south of Gage, Ellis County, Oklahoma. September 17, 1918. #1:/Thompson D.G. Collection/tdg00163 ID. Thompson, D.G. 163 Varieties of grain grown in the vicinity of Gage, Oklahoma; exhibit in Farmers State Bank of Gage; includes broom corn, (left), pop corn (ears at right), sorghum cane (longest stalk), sudan grass, (long bunch at right), feterita, kafir corn, and milo maize. Ellis County, Oklahoma. September 18, 1918. #1:/Thompson D.G. Collection/tdg00164 ID. Thompson, D.G. 164 Rolling country about 4 miles east of Gage, T. 21 N., R. 23 W., looking toward Gage and Wolf Creek Valley. Ellis County, Oklahoma. 1918? #1:/Thompson D.G. Collection/tdg00165 ID. Thompson, D.G. 165 Bridge washed out by floods in July, 1918, on Little Wolf Creek, sec. 11, T. 21 N., R. 24 W., 1 mile east of Gage, Ellis County, Oklahoma. October 19, 1918. #1:/Thompson D.G. Collection/tdg00166 ID. Thompson, D.G. 166 Flood plain, east side of Little Wolf Creek, sec. 11, T. 21 N., R. 24 W., 1 mile east of Gage, Ellis County, Oklahoma. October 19, 1918. #1:/Thompson D.G. Collection/tdg00167 ID. Thompson, D.G. 167 North Fork of Canadian River, about 31 miles east of Woodward, T. 23 N., R. 20 W., Woodward County, Oklahoma. October 19, 1918. #1:/Thompson D.G. Collection/tdg00168 ID. Thompson, D.G. 168 Wolf Creek, looking upstream from bridge one-half mile north of Gage, sec. 3, T. 21 N., R. 24 W., Ellis County, Oklahoma. October 20, 1918. #1:/Thompson D.G. Collection/tdg00169 ID. Thompson, D.G. 169 Big Wichita River, 1,000 feet northwest of Lone Star Company pumping plant, 2 miles west of Byers, Clay County, Texas. Spring horizon marked by willow bushes. Collecting boxes begin at pile of rock near water. October 19, 1918. Used in special report to Bureau of Mines, December 1918. #1:/Thompson D.G. Collection/tdg00171 ID. Thompson, D.G. 171 Panoramic view of Red River, looking upstream from 98th Meridian bridge, 3.5 miles north of Byers, Clay County, Texas. October 19, 1918. #1:/Thompson D.G. Collection/tdg00173 ID. Thompson, D.G. 173 Badland topography near head of branch valley, about 1 mile south and west of Lone Star Gas Co. Lone Star and U.S. Government plants (in background) (or 4 miles south and east of Petrolia), Clay County, Texas. October 19, 1918. #1:/Thompson D.G. Collection/tdg00175 ID. Thompson, D.G. 175 Panoramic view from hill one-half mile southeast of Lone Star Pumping plant, 1.5 miles west of Byers. At extreme left (in distance) shows edge of upland along river. No. 176 shows oxbow of Big Wichita River in center, middle distance, and in foreground dissected "red beds". Flood of Big Wichita River in distance. At right upland approaches close to river. Clay County, Texas. October 20 1918. #1:/Thompson D.G. Collection/tdg00179 ID. Thompson, D.G. 179 U.S.G.S. sign plates on county post, at junction of Cave­Springs-Barstow and Silver Lake-Leach Spring road, 23 miles northwest of Silver Lake, California, sec. 8, T. 16 N., R. 5 E. Enlargement of No. 147 retouched to bring out lettering on sign plates. Crucero Quadrangle, San Bernardino County, California. January 16, 1918. Plate 3, U.S. Geological Survey Water Supply Paper 490-B. #1:/Thompson D.G. Collection/tdg00180 ID. Thompson, D.G. 180 Mount Helena (southwest of Helena, Montana) from the northeast, showing gentle slope to southeast (left) approximately parallel to bedding and steep slope to northwest (right) across bedding. Montana. 1918? #1:/Thompson D.G. Collection/tdg00181 ID. Thompson, D.G. 181 View of Mount Helena from south, from a point well up the ridge, looking across main gulch. White rock outcropping in middle distance is limestone. Hill at extreme left is probably quartzite. Montana. 1918? #1:/Thompson D.G. Collection/tdg00182 ID. Thompson, D.G. 182 Top of Mount Helena from a point far up the mountain, from southwest, showing steep west face and beds dipping in general to the east (right). Montana. 1918? #1:/Thompson D.G. Collection/tdg00183 ID. Thompson, D.G. 183 Looking southwest from Mount Helena, showing ridge of which the mountain is the northeasternmost point. Slope to left (east) is approximately parallel to dip of beds. Montana. 1918? #1:/Thompson D.G. Collection/tdg00184 ID. Thompson, D.G. 184 The lower Hale or Park Reservoir, on Grizzly Gulch, looking downstream. About 5 miles southwest of Helena, Montana. 1918? #1:/Thompson D.G. Collection/tdg00185 ID. Thompson, D.G. 185 The upper Hale Reservoir, near head of Lump Gulch, 12 miles southwest of Helena, Montana, from mountain slope 1/2 to ¾ mile north of reservoir. Jefferson, Montana. 1918? #1:/Thompson D.G. Collection/tdg00186 ID. Thompson, D.G. 186 Chessman Reservoir 12 miles south of Helena, Montana, main source water supply for the city. Red Mountain in background. Jefferson County, Montana. 1918? #1:/Thompson D.G. Collection/tdg00188 ID. Thompson, D.G. 188 Two of the settling basins of Helena, Montana, water system, 7 miles southwest of the city. Jefferson County, Montana. 1918? #1:/Thompson D.G. Collection/tdg00192 ID. Thompson, D.G. 192 Panoramic view of Hauser Lake, a reservoir formed by dam of Missouri River, backing water up Prickley Pear Creek, about 9 miles northeast of Helena, Montana, from SE 1/4 sec. 19, T. 11 N., R. 2 W. Lewis and Clark County, Montana. 1918? #1:/Thompson D.G. Collection/tdg00194 ID. Thompson, D.G. 194 Looking southwest from SE 1/4 sec. 19, T. 11 N., R. 2 W. across valley bordering Hauser Lake. This not not quite join the left side of No. 192. Lewis and Clark County, Montana. 1918? #1:/Thompson D.G. Collection/tdg00195 ID. Thompson, D.G. 195 "Davis Lake" well, probably in sec. 25 or 36, T. 12 N., R. 40 E., 25 miles north of St. Anthony, Idaho; looking southeast. The hills in background are summit of west end of Bishop Mountain, here a plateau; "Davis Lake", is the dried-up depression in foreground. Fremont County, Idaho. [n.d.] #1:/Thompson D.G. Collection/tdg00197 ID. Thompson, D.G. 197 Looking north across valley of Sheridan Creek from road probably in sec. 30, T. 13 N., R. 1 E., 32 miles north of St. Anthony, Idaho, showing broad character of valley. Fremont County, Idaho. [n.d.] #1:/Thompson D.G. Collection/tdg00198 ID. Thompson, D.G. 198 Looking south from about same locality, showing gentle slope to west end of Bishop Mountain. Low mounds in middle distance are lava. Fremont County, Montana. [n.d.] #1:/Thompson D.G. Collection/tdg00199 ID. Thompson, D.G. 199 Looking south across Sheridan Creek from main road near crossing of Willow Creek, sec. 28, T. 13 N., R. 1 E., 35 miles north of St. Anthony, Idaho, showing meanders of Sheridan Creek, with lava just beyond. Bishop Mountain in background. Two pictures not quite continuous. Panorama. Fremont County, Montana. [n.d.] #1:/Thompson D.G. Collection/tdg00201 ID. Thompson, D.G. 201 Pond at Railroad ranch (old Bishop ranch) probably in sec. 11, T. 12 N., R. 1 E., 30 miles north and east of St. Anthony, Idaho. Probably due to springs beneath lava (see No. 202). Bishop Mt. in background. Fremont County, Idaho. [n.d.] #1:/Thompson D.G. Collection/tdg00202 ID. Thompson, D.G. 202 Spring (at man's feet) at Railroad ranch, about 800 feet north of, pond in No. 201. Usual flow of spring said to be 40 inches - when visited was only 5 to 8 inches. View is northeast across valley of Sheridan Creek, here very flat. Fremont County, Idaho. [n.d.] #1:/Thompson D.G. Collection/tdg00203 ID. Thompson, D.G. 203 North Fork of Snake River at crossing of road from valley of Sheridan Creek, probably in sec. 24, T. 13 N., R. 2 E., about 35 miles NE of St. Anthony, Idaho. Fremont County, Idaho. [n.d.] #1:/Thompson D.G. Collection/tdg00204 ID. Thompson, D.G. 204 Snake River near Ripley's ranch, from near NW corner sec. 20, T. 12 N., R. 43 E., 30 miles northeast of St. Anthony, Idaho, looking west, northwest, and north. Bishop Mt. in the distance. Fremont County, Idaho. [n.d.] #1:/Thompson D.G. Collection/tdg00207 ID. Thompson, D.G. 207 Falls River at road crossing near west line of sec. 36, T. 9 R. R. 43 E., 18 miles NW of St. Anthony, Idaho. Dam is for diversion into ditch on far side of creek. Fremont County, Idaho. [n.d.] #1:/Thompson D.G. Collection/tdg00208 ID. Thompson, D.G. 208 Falls River at road crossing near east line of sec. 36, T. 9 N., R. 44 E., 26 miles northeast of St. Anthony, Idaho. Fremont County, Idaho. [n.d.] #1:/Thompson D.G. Collection/tdg00209 ID. Thompson, D.G. 209 View northwest across north end of Sweetsage Flat or Monteview Valley, about 20 miles northwest of Camas, Idaho. View taken from near SW 4 sec. 30, T. 8 N., R. 34 E. Jefferson County, Idaho. [n.d.] #1:/Thompson D.G. Collection/tdg00210 ID. Thompson, D.G. 210 Section along Cajon Creek, near junction with Lone Pine Canyon near South 1/4 corner sec. 12, T. 2 N., R. 6 W., showing contact between old alluvium and underlying metamorphic rocks. San Bernardino County, California. October 18, 1919. #1:/Thompson D.G. Collection/tdg00212 ID. Thompson, D.G. 212 Camp Cajon, view of tables and fireplace (at left). San Bernardino County, California. 1919? #1:/Thompson D.G. Collection/tdg00213 ID. Thompson, D.G. 213 Camp Cajon, view of tables and pump (at left). San Bernardino County, California. 1919? #1:/Thompson D.G. Collection/tdg00214 ID. Thompson, D.G. 214 Panorama looking southwest and west from near center of sec. 23, T. 3 N., R. 6 W., in Cajon Canyon. National Old Trails road in valley in foreground. The next valley beyond black ridge is Cajon Canyon, and the valley beyond that is Lone Pine Canyon. The San Andreas Rift is along Lone Pine Canyon. Cajon Canyon continues south at extreme left. San Bernardino County, California. October 18, 1919. #1:/Thompson D.G. Collection/tdg00217 ID. Thompson, D.G. 217 Panorama, looking southeast from about same point as nos. 214-216. Cajon Canyon goes through lowest place on background, San Gabriel Mountains on right, San Bernardino Mountains on left. Rugged topography in foreground is cut in Quaternary or Tertiary gravels. San Bernardino County, California. October 18, 1919. #1:/Thompson D.G. Collection/tdg00219 ID. Thompson, D.G. 219 Panorama of Cajon Pass, from National Old Trails road, probably in SW 1/4 Sec. 13, T. 3 N., R. 6 W., looking northeast (at left) -south-west (right) at left is steep escarpment facing toward Pacific drainage of Cajon Creek. Beyond it, the land slopes gently to desert (see Nos. 225 to 229). Farther to the right is same region covered in Nos. 214-216 and Nos. 217-218. White streaks along railroad are fire breaks cleared of brush. Panorama Nos. 214-216, taken from ridge to left of road cut at extreme right of picture. San Bernardino County, California. October 18, 1919. #1:/Thompson D.G. Collection/tdg00223 ID. Thompson, D.G. 223 Panorama of Cajon Pass, from National Old Trails road, probably in SW 1/4 Sec. 13, T. 3 N., R. 6 W., looking northeast (at left) -south-west (right) at left is steep escarpment facing toward Pacific drainage of Cajon Creek. Beyond it, the land slopes gently to desert (see Nos. 225 to 229). Farther to the right is same region covered in Nos. 214-216 and Nos. 217-218. White streaks along railroad are fire breaks cleared of brush. Panorama Nos. 214-216, taken from ridge to left of road cut at extreme right of picture. San Bernardino County, California. October 18, 1919. #1:/Thompson D.G. Collection/tdg00225 ID. Thompson, D.G. 225 Panorama of Cajon Pass, from near summit on National Old Trails road near center of sec. 18, T. 3 N., R. 5 W., looking north (on left) east- southeast. On left is gradual slope to desert; on right is steep escarpment to Cajon Canyon. In the middle distance at left is canyon of Mohave River (not cleanly shown). San Bernardino County, California. October 18, 1919. #1:/Thompson D.G. Collection/tdg00230 ID. Thompson, D.G. 230 Looking north down alluvial slope from same point as photos 225 to 229 showing dissected character of upper slope. San Bernardino County. California. October 18, 1919. #1:/Thompson D.G. Collection/tdg00231 ID. Thompson, D.G. 231 North end of San Bernardino Mountains from National Old Trails road near Hesperia, showing alluvial slope. San Bernardino County, California. October 18, 1919. #1:/Thompson D.G. Collection/tdg00232 ID. Thompson, D.G. 232 North end of San Bernardino Mountains from Santa Fe water tank at Hesperia; showing profile of alluvial slope. Mohave River lies in the middle distance (hidden). San Bernardino County, California. October 18, 1919 #1:/Thompson D.G. Collection/tdg00233 ID. Thompson, D.G. 233 Panorama, looking up Mohave River at Barstow from rhyolite butte in river just north of station. River is all dry except a small stream that reaches only to last brush fence upstream. San Bernardino County, California. October 20, 1919. #1:/Thompson D.G. Collection/tdg00242 ID. Thompson, D.G. 242 Panorama of Barstow, San Bernardino County, California. October 20, 1919 #1:/Thompson D.G. Collection/tdg00243 ID. Thompson, D.G. 243 Panorama of Barstow, San Bernardino County, California. October 20, 1919 #1:/Thompson D.G. Collection/tdg00244 ID. Thompson, D.G. 244 Change in course of arroyo, near road an north side of river probably in NE 1/4 sec. 33, T. 10 N., R. 1 W. Old channel was to left of low mound, new channel apparently cut to right in a single storm. San Bernardino County, California. October 1919. #1:/Thompson D.G. Collection/tdg00245 ID. Thompson, D.G. 245 Dust storm along Mohave river 1/2 mile north of Daggett, San Bernardino County, California. October 24, 1919. #1:/Thompson D.G. Collection/tdg00246 ID. Thompson, D.G. 246 Drill rig of D.M. Harlow's, drilling at headworks of Funk Ditch in Mohave River bottom, west of Daggett. San Bernardino County, California. October 24, 1919. #1:/Thompson D.G. Collection/tdg00247 ID. Thompson, D.G. 247 Near view of Harlow's drill rig. The heavy lever is rigged to drive down the casing like a hydraulic press. San Bernardino County, California. October 24, 1919. #1:/Thompson D.G. Collection/tdg00248 ID. Thompson, D.G. 248 Looking north to Calico Mountains, from about NW 1/4 sec. 16, T.9 N., R. 2 E., northeast of Daggett, San Bernardino County, California. October 27, 1919 #1:/Thompson D.G. Collection/tdg00249 ID. Thompson, D.G. 249 Looking north to Calico Mountains, from about NW 1/4 sec. 16, T.9 N., R. 2 E., northeast of Daggett, San Bernardino County, California. October 27, 1919 #1:/Thompson D.G. Collection/tdg00251 ID. Thompson, D.G. 251 New-made "checks" for alfalfa on Elcholz ranch SE 1/4 sec. 8,T.9 N., R.2 E., northeast of Daggett, San Bernardino County, California. October 27, 1917. #1:/Thompson D.G. Collection/tdg00252 ID. Thompson, D.G. 252 Looking south to Newberry Mountains, from NW 1/4 sec. 16, T.9 N., R.2 E. northeast of Daggett. The dark sloping surface near right center is either a lava flow or uplifted alluvial slope. San Bernardino County, California. October 27, 1919. #1:/Thompson D.G. Collection/tdg00253 ID. Thompson, D.G. 253 Close-up of dunes north of Skobal ranch, probably in sec. 11, T. 9 N., R. 2 E., northeast of Daggett, Darkest patches of vegetation in center and left are mesquite. San Bernardino County, California. October 28, 1919. #1:/Thompson D.G. Collection/tdg00254 ID. Thompson, D.G. 254 General view of dune area in same locality as 253. San Bernardino County, California. October 28, 1919. #1:/Thompson D.G. Collection/tdg00255 ID. Thompson, D.G. 255 Panorama, looking northeast (left) and east from dunes at Edwards ranch in SW 1/4 sec. 19, T.9 N.,R.3 E., 3 miles northwest of Newberry Springs. Shows sudden change from sand dunes (at left) to level plain There ground-water supply is poor. Most of this plain probably a part of Buwalda's, "Manix Lake" continuous with Nos. 259-262.:(see Nos.365-368 for views showing evidence of lake along front of distant hills in right hand section. San Bernardino County, California. October 29, 1919. #1:/Thompson D.G. Collection/tdg00259 ID. Thompson, D.G. 259 Continuation of panorama at Edwards ranch looking southeast (at left) south, and southwest (right), showing narrow bell of sand dunes stretching to southeast. At right, the belt wider, enclosing many clay patches. Edwards flowing well shown by derrick just behind clay patch at right hand section. San Bernardino County, California. #1:/Thompson D.G. Collection/tdg00260 ID. Thompson, D.G. 260 Continuation of panorama at Edwards ranch looking southeast (at left) south, and southwest (right), showing narrow bell of sand dunes stretching to southeast. At right, the belt wider, enclosing many clay patches. Edwards flowing well shown by derrick just behind clay patch at right hand section. San Bernardino County, California. #1:/Thompson D.G. Collection/tdg00261 ID. Thompson, D.G. 261 Continuation of panorama at Edwards ranch looking southeast (at left) south, and southwest (right), showing narrow bell of sand dunes stretching to southeast. At right, the belt wider, enclosing many clay patches. Edwards flowing well shown by derrick just behind clay patch at right hand section. San Bernardino County, California. #1:/Thompson D.G. Collection/tdg00262 ID. Thompson, D.G. 262 Continuation of panorama at Edwards ranch looking southeast (at left) south, and southwest (right), showing narrow bell of sand dunes stretching to southeast. At right, the belt wider, enclosing many clay patches. Edwards flowing well shown by derrick just behind clay patch at right hand section. San Bernardino County, California. #1:/Thompson D.G. Collection/tdg00263 ID. Thompson, D.G. 263 Looking north of west from same point as 255-262 across dune belt to Daggett butte in left distance and west end of Calico Mountains at right. Black area on clay flat at left is due to leakage from Edwards pipe line. San Bernardino County, California. #1:/Thompson D.G. Collection/tdg00264 ID. Thompson, D.G. 264 Exposure of alluvium 2.5 miles east of Daggett, on south side of Santa Fe Railway. Height of exposure about 12 feet. San Bernardino County, California. November 3, 1921. Plate 14-A in U.S. Geological Survey. Water-supply paper 578. 1929. #1:/Thompson D.G. Collection/tdg00265 ID. Thompson, D.G. 265 South slope of Calico Mountains, about 1.5 miles northeast Yermo, showing dissection of alluvial slope San Bernardino County, California. November 6, 1919. #1:/Thompson D.G. Collection/tdg00266 ID. Thompson, D.G. 266 Panorama, looking down dissected cone on south slope Calico Mountains, 1.5 miles NE of Yermo, San Bernardino County, California. 1919. #1:/Thompson D.G. Collection/tdg00268 ID. Thompson, D.G. 268 Looking toward head of alluvial fan from a point at right side of No. 267. The dissection of fan shown in 266 - 267 begins farther down the cone. San Bernardino County, California. 1919. #1:/Thompson D.G. Collection/tdg00269 ID. Thompson, D.G. 269 Panorama of Mohave near Yermo, from slope of Calico Mountains, 1.5 miles northeast of Yermo. In left foreground is dissected alluvial cone shown in photos 265 to 268. Light streak in middle distance is Mohave River. Yermo is in middle of two center sections. Dry lake at right. San Bernardino County, California. November 6, 1919. #1:/Thompson D.G. Collection/tdg00272 ID. Thompson, D.G. 272 Panorama of Mohave near Yermo, from slope of Calico Mountains, 1.5 miles northeast of Yermo. In left foreground is dissected alluvial cone shown in photos 265 to 268. Light streak in middle distance is Mohave River. Yermo is in middle of two center sections. Dry lake at right. San Bernardino County, California. November 6, 1919. #1:/Thompson D.G. Collection/tdg00273 ID. Thompson, D.G. 273 Cactus near head of alluvial fan shown in 268. San Bernardino County, California. #1:/Thompson D.G. Collection/tdg00274 ID. Thompson, D.G. 274 Part of dissected alluvial fan shown in 269-272, showing an old channel (near top end a little to left) cut by a later deeper one. San Bernardino County, California. November 6, 1919. #1:/Thompson D.G. Collection/tdg00275 ID. Thompson, D.G. 275 View toward Calico Mountains to one-half to three-fourths mile east Yermo. View is taken a short distance from foot of alluvial slope, to show mounds of sand and clay on right side of plants - either to wind action or surface run-off from dry lake at left. See panorama 269 to 272. San Bernardino County, California. #1:/Thompson D.G. Collection/tdg00276 ID. Thompson, D.G. 276 Looking west, upstream, up Mohave River channel about due south of Yermo. River channel is mostly dune covered no water. San Bernardino County, California. November 6, 1919. #1:/Thompson D.G. Collection/tdg00277 ID. Thompson, D.G. 277 Looking east across dune covered channel of Mohave River toward Yermo from cliff on south side. San Bernardino County, California. November 6, 1919. #1:/Thompson D.G. Collection/tdg00278 ID. Thompson, D.G. 278 In midst of dune area in Mohave River bottom south of Yermo, San Bernardino County, California. 1919. #1:/Thompson D.G. Collection/tdg00279 ID. Thompson, D.G. 279 Cliff on south side of Mohave River south of Yermo, near 1/4 corner sec. 12 and 13, T. 9 N., R. 1 E., about 7 feet of adobe clay at base up to hat; above it is cross bedded gravel. Soft clay at the extreme top. San Bernardino County, California. November 6, 1919. #1:/Thompson D.G. Collection/tdg00280 ID. Thompson, D.G. 280 Close-up of same cliff as in 279. San Bernardino County, California. Plate 25-B in U.S. Geological Survey. Water-supply paper 578. 1929. #1:/Thompson D.G. Collection/tdg00281 ID. Thompson, D.G. 281 Cliff on south side of Mohave River, about 700 feet east of photo 279. About 5 feet of clay at top (to hole below man) then 10 feet of gravel (marked by hat) underlain by adobe clay. San Bernardino County, California. 1919. Plate 25-A in U.S. Geological Survey. Water-supply paper 578. 1929. #1:/Thompson D.G. Collection/tdg00282 ID. Thompson, D.G. 282 Cliff on south side of Mohave River, about 1,000 feet east No. 281, practically on township line between T. 1 and 2.E, 10 feet of clay at top (to base of overhanging cliff) 7 feet of gravel (to camera case) and 3 feet of clay at base. San Bernardino County, California. 1919. #1:/Thompson D.G. Collection/tdg00283 ID. Thompson, D.G. 283 Panorama from hill 2 miles north of Hinkley, T. 10 N., R. 3 W., - looking northwest (left) north and northeast (right) to Harper Lake Valley. Continuous at left with photo nos. 289 to 292, and at right with nos. 286 to 288. Black Mount is long ridge in background at junction of right and center, sections. Fremont Peak rises behind hill at left of center section (of photo?). San Bernardino County, California. November 8, 1919. #1:/Thompson D.G. Collection/tdg00286 ID. Thompson, D.G. 286 Panorama, looking east (left) southeast(right) from same point as photos. 283-285. Note quite continuous with it. At right in distance, is Mohave River Valley west of Barstow. The part of the valley shown in the 2 left center section drains to Harper Lake (at left) but the divide is imperceptible. Continuous at right with photos 289 to 292. San Bernardino County, California. November 8, 1919. #1:/Thompson D.G. Collection/tdg00289 ID. Thompson, D.G. 289 Panorama, looking south (left) southwest and west (right) from same point as photos. 283-285 and 286-288 (not quite continuous with it.) Hinkley at left and Mohave Valley beyond. At right and in center is shown relatively low relief of region extending south toward San Gabriel Range and west to Sierra Nevada. San Bernardino County, California. November 8, 1919. #1:/Thompson D.G. Collection/tdg00290 ID. Thompson, D.G. 290 Panorama, looking south (left) southwest and west (right) from same point as photos. 283-285 and 286-288 (not quite continuous with it.) Hinkley at left and Mohave Valley beyond. At right and in center is shown relatively low relief of region extending south toward San Gabriel Range and west to Sierra Nevada. San Bernardino County, California. November 8, 1919. #1:/Thompson D.G. Collection/tdg00291 ID. Thompson, D.G. 291 Panorama, looking south (left) southwest and west (right) from same point as photos. 283-285 and 286-288 (not quite continuous with it.) Hinkley at left and Mohave Valley beyond. At right and in center is shown relatively low relief of region extending south toward San Gabriel Range and west to Sierra Nevada. San Bernardino County, California. November 8, 1919. #1:/Thompson D.G. Collection/tdg00292 ID. Thompson, D.G. 292 Panorama, looking south (left) southwest and west (right) from same point as photos. 283-285 and 286-288 (not quite continuous with it.) Hinkley at left and Mohave Valley beyond. At right and in center is shown relatively low relief of region extending south toward San Gabriel Range and west to Sierra Nevada. San Bernardino County, California. November 8, 1919. #1:/Thompson D.G. Collection/tdg00293 ID. Thompson, D.G. 293 Alkali covered mound (white) surrounded by mud-cracked clay flat of Harper Dry Lake, 1 mile west of Blacks ranch, probably in sec. 30, T. 11 N., R.3 W. San Bernardino County, California. November 8, 1919. Plate 18-A in U.S. Geological Survey. Water-supply paper 578. 1929. #1:/Thompson D.G. Collection/tdg00294 ID. Thompson, D.G. 294 Looking southeast from near same point as in No. 293, showing gap from Harper Valley to Mohave Valley (left side of right section). San Bernardino County, California. November 8, 1919. #1:/Thompson D.G. Collection/tdg00296 ID. Thompson, D.G. 296 Looking upstream on Mohave River bottom in SW 1/4 sec. 3 or SE 1/4 sec. 4, T. 9 N., R. 2 E., east of Yermo. Water rises to surface at this point. Dunes on left side due to vegetation supported by ground water. San Bernardino County, California. November 11, 1919. #1:/Thompson D.G. Collection/tdg00298 ID. Thompson, D.G. 298 Looking downstream from about same point as photos. 296-297, showing mesquite thicket due to shallow ground water, as opposed to barren waste further upstream in photos 296-297. San Bernardino County, California. November 11, 1919. #1:/Thompson D.G. Collection/tdg00299 ID. Thompson, D.G. 299 Mesquite on bank of Mohave River, showing how roots reach, downward to find water table which is about level with flat where man is standing. Same locality as 298. San Bernardino County, California November 11, 1919. #1:/Thompson D.G. Collection/tdg00300 ID. Thompson, D.G. 300 Mesquite roots reaching down to water table just below surface of Mohave River, same general are as photo 299. San Bernardino County, California. November 11, 1919. Plate 3-B in U.S. Geological Survey. Water-supply paper 578. 1929. #1:/Thompson D.G. Collection/tdg00301 ID. Thompson, D.G. 301 Slough in Mohave River bottom at Barbers ranch, probably in S. half of sec. 3, T. 9 N., R. 2 E. 4 miles east of Yermo, San Bernardino County, California. November 11, 1919. #1:/Thompson D.G. Collection/tdg00302 ID. Thompson, D.G. 302 Panorama from hills north of Kouns siding, approximately in 26, T. 10 N., R. 3 E.; at left is part of Coyote "dry lake" Valley. At right of hills is Mohave Valley. White streak is river bottom, tree-covered at left near Camp Cady. Smooth line in front of railroad is Yermo Mutual Improvement Co's irrigation ditch (unused). San Bernardino County, California. November 12, 1919. #1:/Thompson D.G. Collection/tdg00306 ID. Thompson, D.G. 306 Panorama from Hanix Station on Salt Lake Route, in sec. 5, T 10 N., R. 4 E., looking northeast (left) east, and south (right). In left section (306) Dunn Mountain (behind telephone pole) and Cave Mountain (in middle) are beyond divide. Mohave River Canyon goes through lowest part. Light streak middle distance of center view indicates Mohave Canyon (mostly, below horizon) Cady Mountains in background. San Bernardino County, California. November 13, 1919. Portion is Plate 14-A in U.S. Geological Survey. Water-supply paper 490-B. 1921. #1:/Thompson D.G. Collection/tdg0030a ID. Thompson, D.G. 30a Ponds north of Saratoga Springs, supplied by these springs; looking north down Amargosa Valley from low hill south of springs. Sec. 2, T. 18 N., R. 5 E., Crucero Quadrangle, San Bernardino County, California. September 8, 1917. #1:/Thompson D.G. Collection/tdg00310 ID. Thompson, D.G. 310 Looking northeast (right) and north (left) from same point as in 306-309 with which it is continuous. Alvord Mountains in left section. Manix Wash in valley. San Bernardino County, California. November 13, 1919. #1:/Thompson D.G. Collection/tdg00312 ID. Thompson, D.G. 312 Looking north (right) northwest, and west (left) from about same point as 310-311 with which it is nearly continuous. Alvord Mountains at right, Coyote "dry lake" Valley in center; Calico Mountains at left. San Bernardino County, California. November 13, 1919. #1:/Thompson D.G. Collection/tdg00315 ID. Thompson, D.G. 315 Angular pebbles lying on top of Manix Lake clays in a branch of Manix Lake Wash, probably in sec. 3 or 4, T. 10 N., R.4 E., The pebbles have either been washed in or have settled downward in place as the clays were eroded away. San Bernardino County, California. 1919. #1:/Thompson D.G. Collection/tdg00316 ID. Thompson, D.G. 316 Pebble pavement near Manix Wash. Pebbles more. concentrated at surface than an inch or two surface - fine material washed away. San Bernardino County, California. 1919. #1:/Thompson D.G. Collection/tdg00317 ID. Thompson, D.G. 317 Contact between Manix Lake clay (above) and gravel bed - clay lies below the gravel. Note terrace, effect. San Bernardino County, California. 1919. #1:/Thompson D.G. Collection/tdg00318 ID. Thompson, D.G. 318 Looking down Manix Wash to Mohave River - terraces on south side of river in distance. San Bernardino County, California. 1919. #1:/Thompson D.G. Collection/tdg00319 ID. Thompson, D.G. 319 Panorama showing terrace in Manix Lake clays on west side of Manix Wash, half mile above its junction with Mohave River, probably in sec. 3, T. 10 N., R. 4 E., Terraces along Mohave River in distance at left. San Bernardino County, California. 1919. #1:/Thompson D.G. Collection/tdg00321 ID. Thompson, D.G. 321 Looking east across Manix Wash, near its junction with Mohave River showing Manix Lake beds (light) underlying later alluvium. Mohave River channel in right middle distance. San Bernardino County, California. 1919. #1:/Thompson D.G. Collection/tdg00322 ID. Thompson, D.G. 322 Looking across Mohave River from near mouth of Manix Wash (on left), probably in sec. 3, T. 10 N., R. 4 E., showing terraces along river mostly cut in Manix Lake clays. Joins photo 321 on the left. San Bernardino County, California. 1919. #1:/Thompson D.G. Collection/tdg00325 ID. Thompson, D.G. 325 Panorama from lava butte 1 mile northwest of Daggett, looking north (left) east and southeast (right). Calico Mountains at right. San Bernardino County, California. November 15, 1919. #1:/Thompson D.G. Collection/tdg00328 ID. Thompson, D.G. 328 Panorama from lava butte 1 mile northwest of Daggett, looking north (left) east and southeast (right). Calico Mountains at right. San Bernardino County, California. November 15, 1919. #1:/Thompson D.G. Collection/tdg00329 ID. Thompson, D.G. 329 Panorama from lava butte northwest of Daggett, looking southwest (left) west, and northwest. Mohave River at left. Tertiary hills in center. Low hills (probably a fault line) extending from Calico Mountains at right San Bernardino County, California. November 15, 1919. #1:/Thompson D.G. Collection/tdg00332 ID. Thompson, D.G. 332 View from same butte as 325-328 and 329-331, showing connection between the two views. San Bernardino County, California. November 15, 1919. #1:/Thompson D.G. Collection/tdg00334 ID. Thompson, D.G. 334 Panorama from same butte as 322-324, looking southeast (left; and south (right), Daggett at left. Ord Mountain in distance behind ridge back of Daggett. At right of center section is large wash from Ord Mountain. Low ridge in middle distance at right is probably faulted Pleistocene. San Bernardino County, California. November 15, 1919. #1:/Thompson D.G. Collection/tdg00337 ID. Thompson, D.G. 337 Panorama from limestone hill south of Camp Cady, probably in sec. 30, T. 10 N., R. 4 E., looking west (left) north and northeast (right). Tree-covered Mohave River bottom. At extreme right, note level sloping terrace in front of hills which are north end of Cady Mountains (see photos 322 and 324). At junction of the 2 right sections, sloping black line just above black clumps on far side, trees is a sloping terrace. San Bernardino County, California. November 21, 1919. #1:/Thompson D.G. Collection/tdg00339 ID. Thompson, D.G. 339 Panorama from limestone hill south of Camp Cady, probably in sec. 30, T. 10 N., R. 4 E., looking west (left) north and northeast (right). Tree-covered Mohave River bottom. At extreme right, note level sloping terrace in front of hills which are north end of Cady Mountains (see photos 322 and 324). At junction of the 2 right sections, sloping black line just above black clumps on far side, trees is a sloping terrace. San Bernardino County, California. November 21, 1919. #1:/Thompson D.G. Collection/tdg00342 ID. Thompson, D.G. 342 View from butte at northwest end of Cady Mountains, probably in sec. 20, T. 10 N., R. 4 E., looking west (left), north and east (right). In foreground of left section (no. 343) is level surface seen at right of nos. 337-341. Water in Mohave River stops at right side of no. 345. In same section, cliffs on far side of river show upper 1/3 yellowish beds, below which are greenish Manix Lake beds. Light streak in middle distance of 345 is Manix Wash. nos. 348-351, taken at nearest cliffs to right of knob in 346 and nos. 354-355 at white cliffs, showing in middle distance just to left of the knob. San Bernardino County, California. November 21. 1919. #1:/Thompson D.G. Collection/tdg00344 ID. Thompson, D.G. 344 View from butte at northwest end of Cady Mountains, probably in sec. 20, T. 10 N., R. 4 E., looking west (left), north and east (right). In foreground of left section (no. 343) is level surface seen at right of nos. 337-341. Water in Mohave River stops at right side of no. 345. In same section, cliffs on far side of river show upper 1/3 yellowish beds, below which are greenish Manix Lake beds. Light streak in middle distance of 345 is Manix Wash. nos. 348-351, taken at nearest cliffs to right of knob in 346 and nos. 354-355 at white cliffs, showing in middle distance just to left of the knob. San Bernardino County, California. November 21. 1919. #1:/Thompson D.G. Collection/tdg00346 ID. Thompson, D.G. 346 View from butte at northwest end of Cady Mountains, probably in sec. 20, T. 10 N., R. 4 E., looking west (left), north and east (right). In foreground of left section (no. 343) is level surface seen at right of nos. 337-341. Water in Mohave River stops at right side of no. 345. In same section, cliffs on far side of river show upper 1/3 yellowish beds, below which are greenish Manix Lake beds. Light streak in middle distance of 345 is Manix Wash. nos. 348-351, taken at nearest cliffs to right of knob in 346 and nos. 354-355 at white cliffs, showing in middle distance just to left of the knob. San Bernardino County, California. November 21. 1919. #1:/Thompson D.G. Collection/tdg00348 ID. Thompson, D.G. 348 Panoramic view from point half to 3/4 mile east or photos 342-347, on south bank of Mohave, probably in sec. 21, T. 10 N., R. 4 E. Looking north (left) northeast, and east (right). Shows large meander in right bed, nearly cut off behind hill in section next to right. Coarse fanglomerate at right. At left, it grades into Manix Lake clays. Note terrace in the two left hand sections. San Bernardino County, California. November 21, 1919. Plate 26-A in U.S. Geological Survey. Water-supply paper 578. 1929. #1:/Thompson D.G. Collection/tdg00352 ID. Thompson, D.G. 352 Nearly same as right-hand section of 348-351, showing more of alluvial slope to south. San Bernardino County, California. 1919. #1:/Thompson D.G. Collection/tdg00353 ID. Thompson, D.G. 353 Fanglomerate face of hill at large meander shown in No. 350, showing coarseness of material. San Bernardino County, California. 1919. #1:/Thompson D.G. Collection/tdg00354 ID. Thompson, D.G. 354 Cliff on northeast side of Mohave River bottom, about 1/3 mile north of point where photos 348-351 were taken, showing gradation from fanglomerate (at right) into Manix Lake be (at left San Bernardino County, California. 1919. Plate 27-A in U.S. Geological Survey. Water-supply paper 578. 1929. #1:/Thompson D.G. Collection/tdg00356 ID. Thompson, D.G. 356 Cliffs in Manix Lake beds west of 354-355. Probably recent alluvium at top, crawling mesquite at foot of cliff. San Bernardino County, California. November 21, 1919. #1:/Thompson D.G. Collection/tdg00357 ID. Thompson, D.G. 357 Lower end of stream in Mohave River channel east Camp Cady, about 2/3 mile east of northwest end of Cady Mountains. San Bernardino County, California. November 21, 1919. Plate 21-B in U.S. Geological Survey. Water-supply paper 578. 1929. #1:/Thompson D.G. Collection/tdg00358 ID. Thompson, D.G. 358 Stream in Mohave River channel about half mile upstream from 357 - flow possibly 2 to 2-1/2 second-feet. San Bernardino County, California. November 21, 1919. Plate 21-A in U.S. Geological Survey. Water-supply paper 578. 1929. #1:/Thompson D.G. Collection/tdg00359 ID. Thompson, D.G. 359 Perforated stovepipe casing, taken from well of I.L. Hannan, NW , sec. 12, T. 8 N., R. 3 E., to show perforations. San Bernardino County, California. November 21, 1919. #1:/Thompson D.G. Collection/tdg00360 ID. Thompson, D.G. 360 Channel cut through sand dune at Loman ranch, NW sec. 18, T. 8 N., R. 4 E., by runoff from rainstorm in September, 1919. San Bernardino County, California. November 21, 1919. #1:/Thompson D.G. Collection/tdg00361 ID. Thompson, D.G. 361 Roots of creosote bush exposed in channel in No. 360. San Bernardino County, California. November 21, 1919. Plate 5-A in U.S. Geological Survey. Water-supply paper 578. 1928. #1:/Thompson D.G. Collection/tdg00362 ID. Thompson, D.G. 362 Looking east on National Old Trails road at Loman Ranch NE sec. 18, T. 8 N., R. 4 E., showing long alluvial slope from mountains to Troy "dry lake" (left). San Bernardino County, California. November 21, 1919. Plate 15-A in U.S. Geological Survey. Water-supply paper 490-B. 1926. #1:/Thompson D.G. Collection/tdg00369 ID. Thompson, D.G. 369 Soft puffy clay on top of angular boulders (contact at camera case) with float "riding" down over the clay. North side of hill from which 365-368 was taken. San Bernardino County, California. November 21, 1919. #1:/Thompson D.G. Collection/tdg00370 ID. Thompson, D.G. 370 Close-up of part of clays a short distance west of 369. The clays are probably lake or playa deposits. May be windborne. San Bernardino County, California. November 21, 1919. #1:/Thompson D.G. Collection/tdg00371 ID. Thompson, D.G. 371 Clay under talus - a short distance west of 370 and 369. San Bernardino County, California. November 21, 1919. #1:/Thompson D.G. Collection/tdg00372 ID. Thompson, D.G. 372 Panorama from about same point as 365-268, looking east (left) and south (right) across Troy "dry lake". San Bernardino County, California. November 21, 1919. #1:/Thompson D.G. Collection/tdg00375 ID. Thompson, D.G. 375 Looking SW from same point as 372-374. Not quite connecting with that panorama and photos 365 to 368. San Bernardino County, California. November 21, 1919. #1:/Thompson D.G. Collection/tdg00376 ID. Thompson, D.G. 376 Faint indications of beach lines northeast of Mesquite Spring, looking toward Crucero Hills. San Bernardino County, California. December 2, 1919. #1:/Thompson D.G. Collection/tdg00377 ID. Thompson, D.G. 377 Looking southeast from hill south of Mesquite Spring in sec. 25, T. 11 N., R. 7 E. 23 miles north of Ludlow, Tonopah & Tidewater Railway leading through gap. San Bernardino County, California. December 2, 1919. #1:/Thompson D.G. Collection/tdg00378 ID. Thompson, D.G. 378 Panorama looking west (left), north, and east (right) from south of Mesquite Spring 23 miles north of Ludlow. Crucero Fills at left of right section with valley of Soda Dale behind them. Afton or Cave Mountain is large mountain in background of section next to left-hand section (383). Cronise Valley lies behind low hill at extreme right of same section. Mohave River channels emerge from canyon between low hills in n middle distance and Cave Mountain and spreads across alluvial slope, extending across entire width of panorama. San Bernardino County, California. December 2, 1919. #1:/Thompson D.G. Collection/tdg00382 ID. Thompson, D.G. 382 Panorama looking west (left), north, and east (right) from south of Mesquite Spring 23 miles north of Ludlow. Crucero Fills at left of right section with valley of Soda Dale behind them. Afton or Cave Mountain is large mountain in background of section next to left-hand section (383). Cronise Valley lies behind low hill at extreme right of same section. Mohave River channels emerge from canyon between low hills in n middle distance and Cave Mountain and spreads across alluvial slope, extending across entire width of panorama. San Bernardino County, California. December 2, 1919. #1:/Thompson D.G. Collection/tdg00383 ID. Thompson, D.G. 383 Looking south from same point as 378-382, showing gap to Broadwell "dry lake" Valley, north of Ludlow. San Bernardino County, California. 1919. #1:/Thompson D.G. Collection/tdg00384 ID. Thompson, D.G. 384 San Bernardino County, California form Panorama, looking west (left) and north (right) from a point probably in S.1/4 sec. 2 T.11 N., R. 7 E., Cave or Afton Mountain at left. Cronise Valley lies behind low hills (probably fault blocks) in mid-distance of right section and ride side of center section. San Bernardino County, California. December 3, 1919. #1:/Thompson D.G. Collection/tdg00385 ID. Thompson, D.G. 385 San Bernardino County, California form Panorama, looking west (left) and north (right) from a point probably in S.1/4 sec. 2 T.11 N., R. 7 E., Cave or Afton Mountain at left. Cronise Valley lies behind low hills (probably fault blocks) in mid-distance of right section and ride side of center section. San Bernardino County, California. December 3, 1919. #1:/Thompson D.G. Collection/tdg00386 ID. Thompson, D.G. 386 San Bernardino County, California form Panorama, looking west (left) and north (right) from a point probably in S.1/4 sec. 2 T.11 N., R. 7 E., Cave or Afton Mountain at left. Cronise Valley lies behind low hills (probably fault blocks) in mid-distance of right section and ride side of center section. San Bernardino County, California. December 3, 1919. #1:/Thompson D.G. Collection/tdg00387 ID. Thompson, D.G. 387 Dry channel of Mohave River in fan below Caves Canyon, probably in section 3 or 4, T. 11 N., R.7 E. no distinct channel. San Bernardino County, California. December 3, 1919. #1:/Thompson D.G. Collection/tdg00388 ID. Thompson, D.G. 388 Another view in dry channel of Mohave River a little farther toward center of channel. Trees are desert willow (Catawba?) San Bernardino County, California. December 3, 1919. #1:/Thompson D.G. Collection/tdg00389 ID. Thompson, D.G. 389 Dam across distributary of Mohave River at entrance to Cronise Valley in background. San Bernardino County, California. December 3, 1919. #1:/Thompson D.G. Collection/tdg00390 ID. Thompson, D.G. 390 Concrete and brush dam across a minor distributary, a short distance east of photo 389 (in SW 1/4 sec.29). San Bernardino County, California. December 3, 1919. #1:/Thompson D.G. Collection/tdg00391 ID. Thompson, D.G. 391 Strand lines and low lake cliff on east side of Cronise Valley, probably in SE 1/4 sec. 20, T. 12 N., R. 7 E, (east of Bradley ranch). San Bernardino County, California. November 4, 1919. #1:/Thompson D.G. Collection/tdg00392 ID. Thompson, D.G. 392 Nearer view of lake cliff. San Bernardino County, California. Plate 30-A in U.S. Geological Survey. Water-supply paper 578. 1929. #1:/Thompson D.G. Collection/tdg00393 ID. Thompson, D.G. 393 Panorama looking southwest up valley that lies northwest of Cave or Afton Mountain (on left) from NW 1/4 sec. 30, T. 12 N.R.7 E., Cronise Mountains on right. Black vegetation is mesquite, present because of shallow ground water. San Bernardino County, California. November 4, 1919. #1:/Thompson D.G. Collection/tdg00395 ID. Thompson, D.G. 395 Looking south to gap between Crucero Valley or Cronise Valley from near Walton ranch, NE 1/4 SW see. 17, T. 12 N.R. 7 E. San Bernardino County, California. November 4, 1919. #1:/Thompson D.G. Collection/tdg00396 ID. Thompson, D.G. 396 Looking northwest from same point as in No. 395, to West Cronise Valley. photos 397-401 taken from hill at left. San Bernardino County, California. November 4, 1919. #1:/Thompson D.G. Collection/tdg00397 ID. Thompson, D.G. 397 Panorama from top of hill forming north tip of Cronise Mountains, looking northeast and north to Soda lake Mountains, northwest and west across west Cronise Valley, and southwest to Alvord Mountains. Low hill at left of No. 399 is lava hill that lies just SW of Bitter Spring. Left side of 401 shows steepness of slope of Cronise Mountains. San Bernardino County, California. 1919. #1:/Thompson D.G. Collection/tdg0039a ID. Thompson, D.G. 39a Looking southeast from black rock near north edge of Silver Lake playa in center of No. 38. Photographs Nos. 33 to 39 inclusive were taken from top of limestone hill at left. Shows wave-cut cliff and terrace at end of limestone hill. Town of Silver Lake in center background. It is believed that flood of 1916 did not reach above the lowest black strand line, i.e., it only covered stippled area which is covered with a multitude of small plants which have grown since flood.T. 15 N., R. 8 E., Crucero Quadrangle, San Bernardino County, California. September 8, 1917. #1:/Thompson D.G. Collection/tdg00401 ID. Thompson, D.G. 401 Panorama from top of hill forming north tip of Cronise Mountains, looking northeast and north to Soda lake Mountains, northwest and west across west Cronise Valley, and southwest to Alvord Mountains. Low hill at left of No. 399 is lava hill that lies just SW of Bitter Spring. Left side of 401 shows steepness of slope of Cronise Mountains. San Bernardino County, California. 1919. #1:/Thompson D.G. Collection/tdg00402 ID. Thompson, D.G. 402 Panorama, left to right from top of hill at north end of Cronise Mountains, (same point as in 397 - 401). Looking east and east across East Cronise dry lake. Gap at left end of photo 404 connects with Crucero Valley. San Bernardino County, California. 1919. #1:/Thompson D.G. Collection/tdg00405 ID. Thompson, D.G. 405 Panorama, east (left), south, and west (right) from hill, near center of sec. 28 T. 12 N., R. 7 E. At extreme left is Red Mountain. In distance, at right of it, is Crucero, right of photo 409 is gap to Broadwell dry lake. Mohave River debouches from Caves Canyon, and spreads over big fan, some of water going to East Cronise Valley at right of 409. San Bernardino County, California. December 6, 1919. #1:/Thompson D.G. Collection/tdg00409 ID. Thompson, D.G. 409 Panorama, east (left), south, and west (right) from hill, near center of sec. 28 T. 12 N., R. 7 E. At extreme left is Red Mountain. In distance, at right of it, is Crucero, right of photo 409 is gap to Broadwell dry lake. Mohave River, debouches from Caves Canyon, and spreads over big fan, some of water going to East Cronise Valley at right of 409. San Bernardino County, California. December 6, 1919. #1:/Thompson D.G. Collection/tdg00410 ID. Thompson, D.G. 410 Looking northwest from same point as 405-409, across north end of East Cronise Valley to West Cronise Valley. Mountain at left is north end of Cronise Mountains. San Bernardino County, California. December 6, 1919. #1:/Thompson D.G. Collection/tdg00411 ID. Thompson, D.G. 411 Rock piles on low ridge south of Crucero Hills in "Mormon Pass", probably in SW 1/4 sec. 20, T. 11 N., R. 8 E. Assumed to have been made by Indians, but their significance not known. San Bernardino County, California. December 6, 1919. #1:/Thompson D.G. Collection/tdg00412 ID. Thompson, D.G. 412 Alkali flat and springs, southeast of Crucero Hills, probably in SW 1/4 sec. 21, T. 11 N., R.8 E., looking east. San Bernardino County, California. December 6, 1919. #1:/Thompson D.G. Collection/tdg00413 ID. Thompson, D.G. 413 "Close-up" of salt crust in same locality taken by holding camera above head. San Bernardino County, California. 1919. #1:/Thompson D.G. Collection/tdg00414 ID. Thompson, D.G. 414 Large boulder at foot of hill on east side Crucero Hills, which according to Mr.B. Proctor, has been broken off since he visited the place 6 years ago, either by Lightning, temperature changes or by a boulder falling from above. Diameter about 8 feet. San Bernardino County, California. 1919. #1:/Thompson D.G. Collection/tdg00415 ID. Thompson, D.G. 415 Dunes on east side of Crucero Hills, sec. 17 T. 11 N., R. 8 E. San Bernardino County, California. December 6, 1919. #1:/Thompson D.G. Collection/tdg00416 ID. Thompson, D.G. 416 Large dune at northeast end of some distance north of photo 415. San Bernardino County, California. December 6, 1919. #1:/Thompson D.G. Collection/tdg00417 ID. Thompson, D.G. 417 "Close up" of dune in 416. San Bernardino County, California. December 6, 1919. #1:/Thompson D.G. Collection/tdg00418 ID. Thompson, D.G. 418 Sand dune across gap between rock hills, north end of Crucero Hills, a short distance northwest of photo 416. San Bernardino County, California. December 6, 1919. #1:/Thompson D.G. Collection/tdg00420 ID. Thompson, D.G. 420 Panorama, looking south (right), east, and northeast (left) from north end of Crucero Hills, showing alkali flats at south end of Soda Lake Valley. Soda Lake is white streak in distance on left hand section (423). San Bernardino County, California. December 6, 1919. #1:/Thompson D.G. Collection/tdg00421 ID. Thompson, D.G. 421 Panorama, looking south (right), east, and northeast (left) from north end of Crucero Hills, showing alkali flats at south end of Soda Lake Valley. Soda Lake is white streak in distance on left hand section (423). San Bernardino County, California. December 6, 1919. #1:/Thompson D.G. Collection/tdg00422 ID. Thompson, D.G. 422 Panorama, looking south (right), east, and northeast (left) from north end of Crucero Hills, showing alkali flats at south end of Soda Lake Valley. Soda Lake is white streak in distance on left hand section (423). San Bernardino County, California. December 6, 1919. #1:/Thompson D.G. Collection/tdg00423 ID. Thompson, D.G. 423 Panorama, looking south (right), east, and northeast (left) from north end of Crucero Hills, showing alkali flats at south end of Soda Lake Valley. Soda Lake is white streak in distance on left hand section (423). San Bernardino County, California. December 6, 1919. #1:/Thompson D.G. Collection/tdg00424 ID. Thompson, D.G. 424 Continuation with left side of 423, looking north (right) Soda Lake Mountains, and northwest (left) to Brown Mountain. Crucero behind hill in center of left section (426) and Cave or Afton Mountain behind it. San Bernardino County, California. December 6, 1919. #1:/Thompson D.G. Collection/tdg00425 ID. Thompson, D.G. 425 Continuation with left side of 423, looking north (right) Soda Lake Mountains, and northwest (left) to Brown Mountain. Crucero behind hill in center of left section (426) and Cave or Afton Mountain behind it. San Bernardino County, California. December 6, 1919. #1:/Thompson D.G. Collection/tdg00427 ID. Thompson, D.G. 427 Showing erosion by branches of plants moving in the wind, near Crucero. San Bernardino County, California. December 6, 1919. #1:/Thompson D.G. Collection/tdg00428 ID. Thompson, D.G. 428 Looking southeast from near center of sec. 8, T. 11, N., R. 8 E., San Bernardino County, California. December 6, 1919. #1:/Thompson D.G. Collection/tdg00429 ID. Thompson, D.G. 429 Panorama, from hill at Soda Station in sec. 11, T. 15 N., R. 8 E., looking south (right) southeast, and east (left) across Soda dry lake. Old salt vats in foreground. White streaks on playa are water. San Bernardino County, California. December 7, 1919. Plate 31-A in U.S. Geological Survey. Water-supply paper 578. 1929. #1:/Thompson D.G. Collection/tdg00432 ID. Thompson, D.G. 432 Continuation from left of 431, looking northeast (right) and north (left). San Bernardino County, California. December 7, 1919. #1:/Thompson D.G. Collection/tdg00435 ID. Thompson, D.G. 435 Perforator for small well, in contracted non-cutting position, Crucero. San Bernardino County, California. December 7, 1919. #1:/Thompson D.G. Collection/tdg00436 ID. Thompson, D.G. 436 Perforator in expanded position, showing cutting knife. San Bernardino County, California. December 7, 1919. #1:/Thompson D.G. Collection/tdg00440 ID. Thompson, D.G. 440 Looking west across Mohave River Valley from Rowley ranch NE 1/4 sec. 19, T. 7 N., R. 4 W., San Bernardino County, California. December 15, 1919. #1:/Thompson D.G. Collection/tdg00443 ID. Thompson, D.G. 443 Looking downstream at highway bridge over Mohave River 3 miles north of Victorville, San Bernardino County, California. December 15, 1919. #1:/Thompson D.G. Collection/tdg00444 ID. Thompson, D.G. 444 Looking upstream from same point as in photo 443, showing the Lower Narrows. San Bernardino County, California. December 15, 1919. #1:/Thompson D.G. Collection/tdg00445 ID. Thompson, D.G. 445 Panorama from granite hill on west side of Upper Narrows, south of Victorville, looking southeast (left) south, and southwest (right) showing east mesa, Mohave River bottom, and west mesa. San Bernardino County, California. December 15, 1919. #1:/Thompson D.G. Collection/tdg00449 ID. Thompson, D.G. 449 Looking north to Victorville from same point as in 445. San Bernardino County, California. December, 1919. #1:/Thompson D.G. Collection/tdg00451 ID. Thompson, D.G. 451 Looking south toward San Bernardino (at left) and San Gabriel Mountains, from a point about 2 miles west of Victorville, showing gap at Cajon Pass. San Bernardino County, California. December 16, 1919. #1:/Thompson D.G. Collection/tdg00452 ID. Thompson, D.G. 452 Hydraulic Jacks used in pushing down well casing. Rig of Walter White, Victorville, San Bernardino County, California. December, 1919. #1:/Thompson D.G. Collection/tdg00453 ID. Thompson, D.G. 453 Orchard of E.H. Richardson's "home ranch", Adelanto, sec. 20, T. 6 N., R. 5 W., Looking northwest, hills north of El Mirage in background. San Bernardino County, California. December 15, 1919. #1:/Thompson D.G. Collection/tdg00454 ID. Thompson, D.G. 454 Yuccas near Adelanto. San Bernardino County, California. 1919. #1:/Thompson D.G. Collection/tdg00455 ID. Thompson, D.G. 455 Panorama. Looking northeast (right), north, and northwest (left) from Quartz Hill, near southeast corner sec. 36, T.N., R. 13 W., showing orchard of E.T. Earl ranch at left. Los Angeles County, California. December 18, 1919. #1:/Thompson D.G. Collection/tdg00456 ID. Thompson, D.G. 456 Panorama. Looking northeast (right), north, and northwest (left) from Quartz Hill, near southeast corner sec. 36, T.N., R. 13 W., showing orchard of E.T. Earl ranch at left. Los Angeles County, California. December 18, 1919. #1:/Thompson D.G. Collection/tdg00458 ID. Thompson, D.G. 458 Panorama. Looking southeast (left) and south (right) from about same point as in 455-457, showing Portal Ridge behind which is San Andreas rift line.E.T. Earl orchards at right. Los Angeles County, California. December 18, 1919. #1:/Thompson D.G. Collection/tdg00459 ID. Thompson, D.G. 459 Panorama. Looking southeast (left) and south (right) from about same point as in 455-457, showing Portal Ridge behind which is San Andreas rift line.E.T. Earl orchards at right. Los Angeles County, California. December 18, 1919. #1:/Thompson D.G. Collection/tdg00462 ID. Thompson, D.G. 462 Looking southwest from about same locality as 458-460, not quite continuous with 460. Shows continuation of Portal Ridge. Los Angeles County, California. December 18, 1919. #1:/Thompson D.G. Collection/tdg00463 ID. Thompson, D.G. 463 Ditch-digging machine used in laying irrigation pile in E.T. Earl ranch. Sec. 36, T. 7 N., R. 13 W., Los Angeles County, California. December 18, 1919. #1:/Thompson D.G. Collection/tdg00464 ID. Thompson, D.G. 464 "Close up" of digging wheel. Los Angeles County, California. December 18, 1919. #1:/Thompson D.G. Collection/tdg00465 ID. Thompson, D.G. 465 Rank growth of sage brush mile southwest of Portland ranch, NW sec. 16, T. 7 N., R. 13 W., Los Angeles County, California. December 18, 1919. #1:/Thompson D.G. Collection/tdg00466 ID. Thompson, D.G. 466 Looking north into desert from foothills of San Gabriel Mountains South of Valyermo P.0., Los Angeles County, California. December 19, 1919. #1:/Thompson D.G. Collection/tdg00468 ID. Thompson, D.G. 468 Looking southeast along San Andreas rift (shown by notch in the mountains in center background) from same locality as photos 466-467. Los Angeles County, California. December 19, 1919. #1:/Thompson D.G. Collection/tdg00469 ID. Thompson, D.G. 469 Looking down Big Rock Creek Wash from a point south of Pallett School. Probably in sec. 6, T. 4 N.,R. 9 7., Los Angeles County, California. December 19, 1919. #1:/Thompson D.G. Collection/tdg00470 ID. Thompson, D.G. 470 Panorama. Looking northwest (left) north, and northeast (right) down fan of Big Rock Creek from a point in sec. 32, T. 5 N., R. 9 W., Cleared lands at right are part of Llano Colony. Los Angeles County, California. December 19, 1919. #1:/Thompson D.G. Collection/tdg00471 ID. Thompson, D.G. 471 Panorama. Looking northwest (left) north, and northeast (right) down fan of Big Rock Creek from a point in sec. 32, T. 5 N., R. 9 W., Cleared lands at right are part of Llano Colony. Los Angeles County, California. December 19, 1919. #1:/Thompson D.G. Collection/tdg00472 ID. Thompson, D.G. 472 Panorama. Looking northwest (left) north, and northeast (right) down fan of Big Rock Creek from a point in sec. 32, T. 5 N., R. 9 W., Cleared lands at right are part of Llano Colony. Los Angeles County, California. December 19, 1919. #1:/Thompson D.G. Collection/tdg00473 ID. Thompson, D.G. 473 Panorama of Harold Reservoir, south of Palmdale, looking west from east end. Cliff above right shore is supposed fault scarp described in Water-Supply Paper 278. Los Angeles County, California. January 7, 1920. #1:/Thompson D.G. Collection/tdg00475 ID. Thompson, D.G. 475 Panorama. Looking south (left) and southwest (right) at east end of Harold Reservoir. Earth dam between reservoir and Southern Pacific tracks at left. Los Angeles County, California. December 20, 1919. #1:/Thompson D.G. Collection/tdg00478 ID. Thompson, D.G. 478 Hill with wave-cut terrace and cliff at east end of Harold Reservoir. Looking west from east end of reservoir. (See photo 504). Los Angeles County, California. December 20, 1919. #1:/Thompson D.G. Collection/tdg00479 ID. Thompson, D.G. 479 Close-up of hill seen in photo 478, from west. Los Angeles County, California. 1919. #1:/Thompson D.G. Collection/tdg00480 ID. Thompson, D.G. 480 6-year old pear orchard of J.W. Scott, Little Rock, Los Angeles County, California. January 8, 1920. #1:/Thompson D.G. Collection/tdg00481 ID. Thompson, D.G. 481 Flowing well in SE 1/4 sec. 15, T. 7 N., R. 13 W., Los Angeles County, California. January 10, 1920. #1:/Thompson D.G. Collection/tdg00482 ID. Thompson, D.G. 482 Pond formed from waste from flowing well in photo 981. Los Angeles County, California. January 10, 1920 #1:/Thompson D.G. Collection/tdg00483 ID. Thompson, D.G. 483 Waste from improperly capped flowing well, probably in NE 1/2 sec. 34, T. 8 N., R. 12, W., Los Angeles County, California. January 12, 1920. #1:/Thompson D.G. Collection/tdg00484 ID. Thompson, D.G. 484 Flowing well near Oban Station, equipped with gate valve. Estimated flow about 30 miners inches. Los Angeles County, California. January 12, 1920. #1:/Thompson D.G. Collection/tdg00485 ID. Thompson, D.G. 485 Looking west toward Rosamond Buttes, from hill about 1.5 or 2 miles east of Rosamond. Kern County, California. January 12, 1920. #1:/Thompson D.G. Collection/tdg00486 ID. Thompson, D.G. 486 Panorama. Looking east (left), southeast, and south, (right) from near Indian Spring, probably located in sec. 14, T.9N., R 12 W. Looking across Rosamond dry lake. Kern County, California. January 12, 1920. #1:/Thompson D.G. Collection/tdg00489 ID. Thompson, D.G. 489 Panorama. Looking east (left), southeast, and south, (right) from near Indian Spring, probably located in sec. 14, T.9N., R 12 W. Looking across Rosamond dry lake. Kern County, California. January 12, 1920. #1:/Thompson D.G. Collection/tdg00490 ID. Thompson, D.G. 490 Large Hill at Indian Spring, probably located in sec. 14, T.9 N., R. 12 W., The steep cliff is a fault scarp. Kern County, California. January 12, 1920. #1:/Thompson D.G. Collection/tdg00491 ID. Thompson, D.G. 491 Panorama. Looking east across Antelope Valley, from near NE corner sec. 17, T. 7 N., R. 11 W, Taken with a ray filter on small camera, time one second stop No.3. Los Angeles County, California. January 13, 1920. #1:/Thompson D.G. Collection/tdg00493 ID. Thompson, D.G. 493 Same view as 491-492. Taken with Kodak without ray filter. Time 1/25 sec., stop 32. Los Angeles County, California. January 13, 1920. #1:/Thompson D.G. Collection/tdg00495 ID. Thompson, D.G. 495 Waste from uncapped well in SE 1/4 sec. 16, T. 7 N., R.12 W., one mile southwest of Lancaster. Los Angeles County, California. January 14, 1920. #1:/Thompson D.G. Collection/tdg00496 ID. Thompson, D.G. 496 Near view of same well as in No. 495. Los Angeles County, California. Plate 18-B in U.S. Geological Survey. Water- supply paper 578. 1929. #1:/Thompson D.G. Collection/tdg00497 ID. Thompson, D.G. 497 Flowing well on Rosinsky ranch, 1 mile west of Lancaster. Los Angeles County, California. January 14, 1920. #1:/Thompson D.G. Collection/tdg00498 ID. Thompson, D.G. 498 Waste from flowing well on "north road" 1.5 miles northwest of Lancaster, probably in SW 1/4 sec, 4, T.7 N.R. 12 W. Los Angeles County, California. January 15. 1920. #1:/Thompson D.G. Collection/tdg00499 ID. Thompson, D.G. 499 Panorama. Looking west (left) north, and northeast (right) from near southwest corner of NW 1/4 sec. 20, T. 9 N., R. 13 W., Tehachapi Mountains in left half of view. Low place in mountains on next to left-hand section (500) is Cottonwood Canyon. Rosamond Buttes at right of road. Willow Springs to left of and behind black buildings at right of center section. Kern County, California. January 15, 1920. #1:/Thompson D.G. Collection/tdg00500 ID. Thompson, D.G. 500 Panorama. Looking west (left) north, and northeast (right) from near southwest corner of NW 1/4 sec. 20, T. 9 N., R. 13 W., Tehachapi Mountains in left half of view. Low place in mountains on next to left-hand section (500) is Cottonwood Canyon. Rosamond Buttes at right of road. Willow Springs to left of and behind black buildings at right of center section. Kern County, California. January 15, 1920. #1:/Thompson D.G. Collection/tdg00501 ID. Thompson, D.G. 501 Panorama. Looking west (left) north, and northeast (right) from near southwest corner of NW 1/4 sec. 20, T. 9 N., R. 13 W., Tehachapi Mountains in left half of view. Low place in mountains on next to left-hand section (500) is Cottonwood Canyon. Rosamond Buttes at right of road. Willow Springs to left of and behind black buildings at right of center section. Kern County, California. January 15, 1920. #1:/Thompson D.G. Collection/tdg00502 ID. Thompson, D.G. 502 Panorama. Looking west (left) north, and northeast (right) from near southwest corner of NW 1/4 sec. 20, T. 9 N., R. 13 W., Tehachapi Mountains in left half of view. Low place in mountains on next to left-hand section (500) is Cottonwood Canyon. Rosamond Buttes at right of road. Willow Springs to left of and behind black buildings at right of center section. Kern County, California. January 15, 1920. #1:/Thompson D.G. Collection/tdg00504 ID. Thompson, D.G. 504 Harold Reservoir, 1 mile south of Palmdale, from the east (see photos 473-479). Los Angeles County, California. January 16, 1920. #1:/Thompson D.G. Collection/tdg00505 ID. Thompson, D.G. 505 Looking down Little Rock Creek Canyon from dam site in sec. 27, T. 5 N., R. 11 W. Present intake of Palmdale Canal at black spot beneath shack. Note old stream valley cut by present stream channel. Los Angeles County, California. January 16, 1920. #1:/Thompson D.G. Collection/tdg00507 ID. Thompson, D.G. 507 Looking upstream in Little Rock Creek Canyon from a point several hundred feet downstream from 505-506. Dam site crosses from about the highest part of the mountain in left foreground. Los Angeles County, California. January 16, 1920. #1:/Thompson D.G. Collection/tdg00508 ID. Thompson, D.G. 508 Part of Palmdale flume on Little Rock Creek severe hundred feet below damsite. Los Angeles County, California. January 16, 1920. #1:/Thompson D.G. Collection/tdg00509 ID. Thompson, D.G. 509 Outlet in Palmdale Canal used to supply water to Little Rock Creek District. The water is emptied back into stream channel. Los Angeles County, California. January 16, 1920. #1:/Thompson D.G. Collection/tdg00510 ID. Thompson, D.G. 510 Little Rock Creek Canyon. Los Angeles County, California. January 16, 1920. #1:/Thompson D.G. Collection/tdg00511 ID. Thompson, D.G. 511 Wood flume of Palmdale Canal, below flume bridge across Little Rock Creek. Los Angeles County, California. January 16, 1920. #1:/Thompson D.G. Collection/tdg00512 ID. Thompson, D.G. 512 Palmdale Canal at end of flume in Little Rock Creek Canyon. Los Angeles County, California. January 16, 1920. #1:/Thompson D.G. Collection/tdg00513 ID. Thompson, D.G. 513 Submerged dam on Little Rock Creek, probably in sec. 22, T. 5 N., R. 11 W. Los Angeles County, California. January 16, 1920. #1:/Thompson D.G. Collection/tdg00514 ID. Thompson, D.G. 514 Hydraulic rotary drill rig of Bob Orr, Lancaster, Also shows perforated casing. Los Angeles County, California. December 18, 1919. #1:/Thompson D.G. Collection/tdg00515 ID. Thompson, D.G. 515 Rotating "table" of Orr's drill rig. Los Angeles County, California. #1:/Thompson D.G. Collection/tdg00516 ID. Thompson, D.G. 516 Los Angeles County, Calif. Drill bit of Orr's drill rig. #1:/Thompson D.G. Collection/tdg00517 ID. Thompson, D.G. 517 Los Angeles County, California Pipe and Mt of Orr's drill rig. #1:/Thompson D.G. Collection/tdg00518 ID. Thompson, D.G. 518 "Close up" of perforated casing used in Antelope Valley. Los Angeles County, California. January 14, 1920. #1:/Thompson D.G. Collection/tdg00519 ID. Thompson, D.G. 519 Leonis Valley, near Leonis School, probably in sec. 17, T. 6 N., R. 13 W., S.B.M. showing dry farmed orchard and grain. fields high up on mountain side. Los Angeles County, California. January 19, 1920. #1:/Thompson D.G. Collection/tdg0051a ID. Thompson, D.G. 51a Giant yucca. San Bernardino County, California. September 1917? #1:/Thompson D.G. Collection/tdg00520 ID. Thompson, D.G. 520 Amargosa Creek, in Leonis Valley, west of Leonis School, showing steep narrow channel. This valley is along the San Andreas rift. Los Angeles County, California. Jan. 19, 1920. #1:/Thompson D.G. Collection/tdg00521 ID. Thompson, D.G. 521 Trench of Amargosa Creek in Leonis Valley. Los Angeles County, California. #1:/Thompson D.G. Collection/tdg00522 ID. Thompson, D.G. 522 Looking southeast across reservoir being constructed in Liebre ranch, probably in sec. 32, T. 9 N., R. 17 W. West end of Antelope Valley. Kern County, California. January 19, 1920. #1:/Thompson D.G. Collection/tdg00523 ID. Thompson, D.G. 523 Looking northwest toward. Tehachapi Mountains, from about same point as photo 522. Kern County, California. #1:/Thompson D.G. Collection/tdg00524 ID. Thompson, D.G. 524 Looking southeast (more to east) from near same point as in 522, showing broad valleys. Kern County, California. #1:/Thompson D.G. Collection/tdg00528 ID. Thompson, D.G. 528 Looking northwest to Tehachapi Mountains from location of photo 522. Kern County, California. January 19, 1920. #1:/Thompson D.G. Collection/tdg00529 ID. Thompson, D.G. 529 Looking down the Alamos Creek about half mile southwest of reservoir shown in photo 522. Kern County, California. 1920. #1:/Thompson D.G. Collection/tdg00530 ID. Thompson, D.G. 530 Probably looking up to Tehachapi Mountains from same locality as 529. Kern County, California. 1920. #1:/Thompson D.G. Collection/tdg00531 ID. Thompson, D.G. 531 Looking up Lecheria Creek, near junction with Fish Creek, pro bably in sec. 29, T. 9 N., R. 17 W. Kern County, California. #1:/Thompson D.G. Collection/tdg00532 ID. Thompson, D.G. 532 Looking downstream from junction of Pescada (Fish) Creek and Lecheria Creek, same locality as 530. "Watch horn" oil well in right middle distance. Kern County, California. January 19, 1920. #1:/Thompson D.G. Collection/tdg00533 ID. Thompson, D.G. 533 Looking upstream from bridge over Mohave River at Barstow, San Bernardino County, California. January 23, 1920. Plate 20-B in U.S. Geological Survey. Water-supply paper 578. 1929. #1:/Thompson D.G. Collection/tdg00534 ID. Thompson, D.G. 534 Roots of fallen yucca 6 miles north of Barstow, San Bernardino County, California. January 24, 1920. Plate 5-C in U.S. Geological Survey. Water-supply paper 578. 1929. #1:/Thompson D.G. Collection/tdg00535 ID. Thompson, D.G. 535 Side view of yucca roots. San Bernardino County, California. January 24, 1920. Plate 5-B in U.S. Geological Survey. Water-supply paper 578. 1929. #1:/Thompson D.G. Collection/tdg00536 ID. Thompson, D.G. 536 Panorama. Looking northwest (left), north, and northeast (right) across valley 7 miles north of Barstow, from a point probably in SW 1/4 sec. 4, T. 11 N.R. 1 W., San Bernardino County, California. January 24, 1920. #1:/Thompson D.G. Collection/tdg00539 ID. Thompson, D.G. 539 Road junction 7.5 miles north of Barstow, showing signs erected by Auto Club of Southern California, (left), and by U.S. Geological Survey. (right). San Bernardino County, California. January 24, 1920. #1:/Thompson D.G. Collection/tdg00540 ID. Thompson, D.G. 540 Looking across middle one of three playas in Superior Valley, from northwest side, in sec. 17, T. 31 S., R. 41.6 E., San Bernardino County, California. Plate 15-B in U.S. Geological Survey. Water-supply paper 490-B. 1921. #1:/Thompson D.G. Collection/tdg00541 ID. Thompson, D.G. 541 U.S. Geological Survey signpost at Copper City, sec. 6, T. 30 S., R. 45 E., showing enamel broken off (black spaces). San Bernardino County, California. January 24, 1920. #1:/Thompson D.G. Collection/tdg00542 ID. Thompson, D.G. 542 Pilot Knob, in sec. 23, T. 29 S., R. 44 E., from southwest (from a point south of road junction in sec. 34. San Bernardino County, California. 1920. Plate 14-B in U.S. Geological Survey. Water-supply paper 578. 1929. #1:/Thompson D.G. Collection/tdg00543 ID. Thompson, D.G. 543 Panorama. Looking northeast (right), north, and northwest (left), showing Pilot Knob and, on left lava buttes. From same locality as 542. San Bernardino County, California. 1920. #1:/Thompson D.G. Collection/tdg00547 ID. Thompson, D.G. 547 Orchard 5 years old) of H.E. Joos, NW.1/4 sec. 26, T. 26 S., R. 39 E., San Bernardino County, California. January 26, 1920. #1:/Thompson D.G. Collection/tdg00548 ID. Thompson, D.G. 548 Looking northeast from SW corner sec. 14 T. 26 S., R. 39 E.,. L.C.B. application No. 05265, Chas.W. Simington. San Bernardino County, California. January 26, 1920. #1:/Thompson D.G. Collection/tdg00549 ID. Thompson, D.G. 549 Five year old fruit trees on ranch of H.N. Androus, NW 1/4 sec. 11, T. 26 S., R. 39 E., San Bernardino County, California. January 26, 1920. #1:/Thompson D.G. Collection/tdg00550 ID. Thompson, D.G. 550 Measuring yield of well of S.A. Arbuthnot, sec. 19, T. 26 S., R. 20 E., east of Inyokern, San Bernardino County, California. January 26, 1920. #1:/Thompson D.G. Collection/tdg00551 ID. Thompson, D.G. 551 Alkali ridges in SE 1/4 sec. 31, T. 25 S., R. 40 E., east of Inyokern, Indian Wells Valley. San Bernardino County, California. January 29, 1920. #1:/Thompson D.G. Collection/tdg00552 ID. Thompson, D.G. 552 Alkali about 500 feet south and 200 feet east of 551. San Bernardino County, California. January 29, 1920. #1:/Thompson D.G. Collection/tdg00553 ID. Thompson, D.G. 553 Looking northeast from a point about one-fourth mile east of S.W. corner of see. 3, T. 26 S., R 40 E., San Bernardino County, California. January 29, 1920.L.C.B. No. 5227. #1:/Thompson D.G. Collection/tdg00554 ID. Thompson, D.G. 554 Looking northeast from a point probably near northwest corner of sec. 13 T. 26 S., R. 40 E., White streak in middle distance is China Dry Lake in Indian Wells Valley. San Bernardino County, California. January 30, 1920. #1:/Thompson D.G. Collection/tdg00555 ID. Thompson, D.G. 555 Alkali on China Dry Lake, Indian Wells Valley, probably in S, of SE sec. 2, T. 26 S., R.40E. San Bernardino County, California. 1920. #1:/Thompson D.G. Collection/tdg00556 ID. Thompson, D.G. 556 Looking east from a point probably near the SW 1/4 sec. 2, T. 26 S., R. 40 E., White streak is China Dry Lake. San Bernardino County, California. January 30, 1920. #1:/Thompson D.G. Collection/tdg00558 ID. Thompson, D.G. 558 Looking east, showing Pleistocene outlet channel from Indian Wells Valley to Searles Lake, San Bernardino County, California. January 30, 1920. #1:/Thompson D.G. Collection/tdg00559 ID. Thompson, D.G. 559 Looking north to lava flow from hill probably near S.W. corner sec. 24, T. 24 S., R. 39 E., north end Indian Wells Valley. Inyo County, California. February 3, 1920. #1:/Thompson D.G. Collection/tdg00560 ID. Thompson, D.G. 560 Looking north up old channel from Owens Valley at northwest end of Indian Wells Valley, from point near northeast corner sec. 5, T. 24 S., R. 38 E., Inyo County, California. February 4, 1920. #1:/Thompson D.G. Collection/tdg00561 ID. Thompson, D.G. 561 Looking west to Sierra Nevada from near Loco siding, sec. 9, T. 20 S., R. 37 E., Inyo County, California. February 4, 1920. #1:/Thompson D.G. Collection/tdg00562 ID. Thompson, D.G. 562 Looking northeast across south end of Haiwee Reservoir showing mountains. Probably Tertiary sediments up to top of white beds with Tertiary volcanics above. Sec. 3, T. 21 S., R. 38 E., Inyo County, California. February 4, 1920. #1:/Thompson D.G. Collection/tdg00563 ID. Thompson, D.G. 563 Looking northwest across dam and Haiwee Reservoir, sec. 3, T. 21 S., R. 38 E. Inyo County, California. February 4, 1920. #1:/Thompson D.G. Collection/tdg00565 ID. Thompson, D.G. 565 Power house and beginning of Los Angeles aqueduct, with dam of Haiwee reservoir in right middle distance, sec. 3, T. 21 S., R. 38 E. Inyo County, California. February 4, 1920. #1:/Thompson D.G. Collection/tdg00566 ID. Thompson, D.G. 566 Channel of Pleistocene stream from Owens Lake, to Indian Wells Valley looking north from SW 1/4 sec. 15, T. 21 S, R. 37 E. Inyo County, California. February 4, 1920. #1:/Thompson D.G. Collection/tdg00567 ID. Thompson, D.G. 567 Los Angeles aqueduct in sec. 15, T. 21 S., R 37 E. Inyo County, California. February 4, 1920. #1:/Thompson D.G. Collection/tdg00568 ID. Thompson, D.G. 568 Coso Hot Springs, sec. 1, T. 22 S., R. 39 E. Inyo County, California. February 4, 1920. #1:/Thompson D.G. Collection/tdg00569 ID. Thompson, D.G. 569 Looking east from Coso Hot Springs to lava mountains. Cone to right of center is probably Louisiana Butte. Inyo County, California. February 4, 1920. #1:/Thompson D.G. Collection/tdg00570 ID. Thompson, D.G. 570 Channel(?) from Rogers Dry Lake to Kane Dry Lake, looking north west from Mojave-Atolia road probably in SW sec. 17, T. 32 S.R. 38 E., Kern County, California. February 6, 1920. #1:/Thompson D.G. Collection/tdg00571 ID. Thompson, D.G. 571 Pond on road 1 mile east and 2 or 3 miles north of Oban, probably supplied from flowing wells. Los Angeles County, California. February 7, 1920. #1:/Thompson D.G. Collection/tdg00572 ID. Thompson, D.G. 572 Flowing well at west end of Rosamond Dry Lake, about 8 miles north of Lancaster, Estimated yield 60 miner's inches. Los Angeles County, California. February 7, 1920. #1:/Thompson D.G. Collection/tdg00573 ID. Thompson, D.G. 573 Flowing stream along road about 1 mile east of Oban Station, looking west. Originates from waste of uncapped wells. Los Angeles County, California. February 7, 1920. #1:/Thompson D.G. Collection/tdg00574 ID. Thompson, D.G. 574 Same stream as in 573, looking east. Los Angeles County, California. February 7, 1920. #1:/Thompson D.G. Collection/tdg00575 ID. Thompson, D.G. 575 The only survivor of several original navel oranges introduced into California. from Florida, Riverside County, California. February 1920. #1:/Thompson D.G. Collection/tdg00576 ID. Thompson, D.G. 576 Drill rig (stream) of S.F. Caty, drilling in yard of San Bernardino, City Water Department. San Bernardino County, California. February 1920. #1:/Thompson D.G. Collection/tdg00577 ID. Thompson, D.G. 577 Looking down Mill Creek Wash, probably in SW 1/4 sec. 16, T. 1 S, R. 2 W, 4 miles east of Redlands, San Bernardino County, California. February 1920. #1:/Thompson D.G. Collection/tdg00578 ID. Thompson, D.G. 578 Looking northeast to mouth of Santa Ana Canon, from a point near junction of Santa Ana River and Mill Creek in N.1/2 of sec. 17, T. 1 S, R. 2 W., San Bernardino County, California. February 1920. #1:/Thompson D.G. Collection/tdg00579 ID. Thompson, D.G. 579 U.S. Geological Survey stream gaging station on San Gabriel River NE 1/4 sec. 23, T. 1 N., R. 10 W., Los Angeles County, California. April 14, 1921. #1:/Thompson D.G. Collection/tdg00580 ID. Thompson, D.G. 580 Men making seepage measurement on San Gabriel River below Foothills Boulevard bridge, sec. 28, T. 1 N., R. 10 W., April 14, 1921. Los Angeles County, California. #1:/Thompson D.G. Collection/tdg00581 ID. Thompson, D.G. 581 San Gabriel River, looking upstream from a point below Foothills Boulevard bridge in sec. 28, T. 1 N., R. 10 W., "Old Baldy" in the distance. Los Angeles County, California. April 14, 1921. #1:/Thompson D.G. Collection/tdg00582 ID. Thompson, D.G. 582 Looking northwest to shore, on Rogers Dry Lake, west end, probably in sec. 25, T. 9 N., R. 10 W., Kern County, California. April 27, 1921. #1:/Thompson D.G. Collection/tdg00583 ID. Thompson, D.G. 583 Looking northeast on Rogers Dry Lake, from same general locality as photo 582. Difference in color of clay in foreground due to clay film washed over surface, (see 584). Reflection along shore at left, as if from water is due to a mirage. Kern County, California. April 27, 1921. #1:/Thompson D.G. Collection/tdg00584 ID. Thompson, D.G. 584 Thin film of clay (dark) washed over surface of dry lake, (see 583) Round holes probably caused by pebbles sinking in when clay is soft. Pocket watch for scale. Kern County, California. April 27, 1921. #1:/Thompson D.G. Collection/tdg00585 ID. Thompson, D.G. 585 Looking east across Rogers Dry Lake from same general locality as No. 583. Kern County, California. April 27, 1921. #1:/Thompson D.G. Collection/tdg00586 ID. Thompson, D.G. 586 Beach ridge at northeast side of Rosamond Dry Lake, looking southeast, probably near center of sec. 34, T. 9 N., R. 11 W., Kern County, California. April 27, 1921. #1:/Thompson D.G. Collection/tdg00587 ID. Thompson, D.G. 587 Part of Rosamond Dry Lake plowed up in attempts to grow rice. Probably sec. 1, T. 8 N., R. 12 W., Kern County, California. April 27, 1921. #1:/Thompson D.G. Collection/tdg00588 ID. Thompson, D.G. 588 Looking southwest from upland east of Knechts ranch, probably in sec. 18, T. 10 N., R. 15 W., showing gentle partially wooded slopes of crest of Tehachapi Range (Liebre Twins) with gently sloping plateaus at base. Kern County, California. April 28, 1921. #1:/Thompson D.G. Collection/tdg00589 ID. Thompson, D.G. 589 Cottonwood Creek, .25 mile north of Knecht ranch, probably in sec. 7, T. 10 N., R. 15 W., Kern County, California. April 28, 1921. #1:/Thompson D.G. Collection/tdg00590 ID. Thompson, D.G. 590 Cottonwood Creek, probably in sec. 7, T. 10 N., R. 15 W., Kern County, California. April 28, 1921. #1:/Thompson D.G. Collection/tdg00591 ID. Thompson, D.G. 591 Looking across canyon of Cottonwood Creek near Knechts ranch, near same locality as 589. Kern County, California. 1921. #1:/Thompson D.G. Collection/tdg00592 ID. Thompson, D.G. 592 Panorama. looking southeast (right) east, and northeast (left) from Knechts ranch in sec. 7, T. 10 N., R. 15 W,. Antelope Valley in center distance. Kern County, California. April 28, 1921. #1:/Thompson D.G. Collection/tdg00596 ID. Thompson, D.G. 596 Panorama. looking southeast (right) east, and northeast (left) from Knechts ranch in sec. 7, T. 10 N., R. 15 W,. Antelope Valley in center distance. Kern County, California. April 28, 1921. #1:/Thompson D.G. Collection/tdg00597 ID. Thompson, D.G. 597 Panoramic with 596 but does not quite join it on the left. Kern County, California. April 28, 1921. #1:/Thompson D.G. Collection/tdg00598 ID. Thompson, D.G. 598 Looking east down lower part of canyon of Cottonwood Creek from about same locality as 588. Kern County, California. April 28, 1921. #1:/Thompson D.G. Collection/tdg00599 ID. Thompson, D.G. 599 Looking southeast toward Rosamond Buttes from road along Los Angeles aqueduct between Cottonwood Creek and road from Willow Springs to Oak Creek. Shows how flood from cloudburst has leveled soil bank from aqueduct (at left) and filled in above it, T. 10 N., R. 14 w., Kern County, California. April 28, 1921. #1:/Thompson D.G. Collection/tdg00600 ID. Thompson, D.G. 600 Looking northwest toward Tehachapi Mountains from about same point as 599, showing coarse debris deposited from cloudburst. Kern County, California. April 28, 1921. #1:/Thompson D.G. Collection/tdg00601 ID. Thompson, D.G. 601 Looking northwest to Tehachapi Mountains on road from Willow Spring to Oak Creek, northwest of Los Angeles aqueduct, probably in sec. 12 or 1, T. 10 N., R. 14 W., Low place is Oak Creek Canyon. Kern County, California. April 28, 1921. #1:/Thompson D.G. Collection/tdg00602 ID. Thompson, D.G. 602 Looking southwest up Oak Creek from near road junction in sec. 15, T. 11 N., R. 14 W., Kern County, California. April 28, 1921. #1:/Thompson D.G. Collection/tdg00603 ID. Thompson, D.G. 603 Looking east down Oak Creek from same point as 602. Kern County, California. April 28, 1921. #1:/Thompson D.G. Collection/tdg00604 ID. Thompson, D.G. 604 Panorama. Head of large valley 3 miles southeast of Fairmont, in sec. 17, T. 7 N., R. 14 W., with Portal Ridge in background. San Andreas fault line probably lies along base of ridge. The valley is probably earlier than the fault. Los Angeles County, California. April 30, 1921. #1:/Thompson D.G. Collection/tdg00606 ID. Thompson, D.G. 606 Panorama. At left with 604-605, but not quite joining it (Looking east). The valley is too large to have been cut by existing streams. Los Angeles County, California. April 30, 1921. #1:/Thompson D.G. Collection/tdg00609 ID. Thompson, D.G. 609 Looking south up mouth of Sheep Creek Canyon, from a point probably in SE 1/4 sec. 21, T. 4 N., R. 7 W., San Bernardino County, California. May 1, 1921, #1:/Thompson D.G. Collection/tdg00610 ID. Thompson, D.G. 610 Gash in mountain left by landslide(?) and stream channel tributary to Sheep Creek looking southwest from road one fourth mile west of B.M. 6006 in sec. 16, T. 3 N., R. 7 W. San Antonio quadrangle. San Bernardino County, California. May 1, 1921. #1:/Thompson D.G. Collection/tdg00611 ID. Thompson, D.G. 611 Tertiary sandstones in Cajon Canyon west of Atchison Topeka & Santa Fe Railway. looking north from a point probably in sec. 27, T. 3 N.,R. 6 W, San Bernardino County, California. May 1, 1921. #1:/Thompson D.G. Collection/tdg00612 ID. Thompson, D.G. 612 Tertiary sandstones in Cajon Canyon, looking northwest from same general locality as in 611. San Bernardino County, California. May 1921. #1:/Thompson D.G. Collection/tdg00614 ID. Thompson, D.G. 614 San Antonio Creek a mile or more above Old Baldy Camp. Los Angeles County, California. May 6, 1921. #1:/Thompson D.G. Collection/tdg00615 ID. Thompson, D.G. 615 San Jacinto River (dry channel) looking southeast, from highway bridge in sec. 15, T. 4 S., R. 1 W., 3 miles northwest of San Jacinto, Riverside County, California. 1921. #1:/Thompson D.G. Collection/tdg00616 ID. Thompson, D.G. 616 Cactus blooms in yard of Mrs. Bates, southern part of Los Angeles, one-eighth mile west of Vermont Avenue on Garfield Street, Redondo quadrangle. Los Angeles County, California. June 1921. #1:/Thompson D.G. Collection/tdg00617 ID. Thompson, D.G. 617 Leach Spring, in northern part of Mohave Desert region, Photographed by H.S. Gale. San Bernardino County, California. 1921. #1:/Thompson D.G. Collection/tdg0143a ID. Thompson, D.G. 143a Sign warning against drinking flowing water at west end of Salt Wells Canyon, sec. 28, T. 26 S., R. 42 E., 10 miles south west of Trona. White salt crust on floor of canyon. Searles Lake Quadrangle, San Bernardino County, California. January 5, 1916. #1:/Thompson D.G. Collection/tdg0146a ID. Thompson, D.G. 146a County signpost with old board signs, at junction of Cave Springs-Barstow and Silver Lake roads, 23 miles northwest of Silver Lake, probably sec. 8, T. 16 N., R. 5 E. Crucero Quadrangle, San Bernardino County, California. Jan 16, 1918. #1:/Thompson D.G. Collection/tdg0266a ID. Thompson, D.G. 266a Nearer view of dissected alluvial slope in photo 265, showing how old slope merges into present slope. 3-4Q. San Bernardino County, California. #1:/Thompson D.G. Collection/tdg0301b ID. Thompson, D.G. 301b Measuring flow yield of well on Edwards ranch, SW sec. 19, T.9 N.,R. 3 E. San Bernardino County, California. October 29, 1919. #1:/Thompson D.G. Collection/tdg0301c ID. Thompson, D.G. 301c Stilling ditch before weir was put in Edwards ranch. San Bernardino County, California. 1919. #1:/Thompson D.G. Collection/tdg0301e ID. Thompson, D.G. 301e Weir set in ditch looking downstream San Bernardino County, California. 1919. #1:/Thompson D.G. Collection/tdg0361a ID. Thompson, D.G. 361a "Onion bulb plant" - Ericogonum inflatum taken near Daggett, San Bernardino County, California. 1919. #1:/Thompson D.G. Collection/tdg0375a ID. Thompson, D.G. 375a Well rig, of H.A. Briggs, Hinkley, San Bernardino County, California. November 28, 1919. #1:/Thompson D.G. Collection/tdg0375b ID. Thompson, D.G. 375b Emptying sticky clay from boiler of Briggs' rig. San Bernardino County, California. November 28, 1919. #1:/Thompson D.G. Collection/tdg0375c ID. Thompson, D.G. 375c Mohave River, looking upstream at a point about, 1,000 feet above wagon bridge at Barstow. The stream had advanced from the point where the man stands between 6 P.M. of the previous day and 9 A.M., when the photograph was taken. San Bernardino County, California. November 30(?), 1919. #1:/Thompson D.G. Collection/tdg0477a ID. Thompson, D.G. 477a Earth dam separating Harold reservoir from Southern Pacific tracks. Los Angeles County, California. 1919. #1:/Thompson D.G. Collection/tdg0480a ID. Thompson, D.G. 480a Looking up Little Rock Creek from bridge one mile west of Little Rock Post Office, Los Angeles County, California. January 8(?), 1920. #1:/Thompson D.G. Collection/tdg0484a ID. Thompson, D.G. 484a Waste from capped well probably in NW1/4, sec. 4, T. 8 N., R. 12 W. Los Angeles County, California. #1:/Thompson D.G. Collection/tdg0494a ID. Thompson, D.G. 494a Discharge of Geo.A. Niller's well SW 1/4 sec. 23, T. 7 N., R. 11, W. Discharge estimated at 100 miner's inches. Los Angeles County, California. #1:/Thompson D.G. Collection/tdg0503a ID. Thompson, D.G. 503a Looking east above the fault scarp at Willow Springs, sec. 7, T. 9 N., R. 13 W., showing pipe line to tanks from one of main springs. Dark patch in foreground is covered with green salt grass. Kern County, California. January 15, 1920. #1:/Thompson D.G. Collection/tdg0518a ID. Thompson, D.G. 518a Discharge of new well on T. Earl's estate, SE 1/4 sec. 26, T.7 N., R. 13 W., Yield estimated at 100 miner's inches. Los Angeles County, California. January 14, 1920. #1:/Thompson D.G. Collection/tdg0521a ID. Thompson, D.G. 521a Thick growth of Juniper and Yuccas between Fairmont and Manzana, T. 8 N., R.15 W. Los Angeles County, California. January 19, 1920. #1:/Thompson D.G. Collection/tdg0574a ID. Thompson, D.G. 574a Same stream as in 573, looking east. Los Angeles County, California. February 7, 1920. #1:/Thompson D.G. Collection/tdg0574b ID. Thompson, D.G. 574b Same stream as in 573, looking east. Los Angeles County, California. February 7, 1920. #1:/Thompson D.G. Collection/tdg0579a ID. Thompson, D.G. 579a Looking northwest from a point several hundred feet southwest of U.S. Geological Survey gaging station to show older alluvium, along San Gabriel River; also shows spreading ditches in foreground. Los Angeles County, California. April 14, 1921. #1:/Yosemite National Park/thw00032 ID. Turner, H.W. 32 Yosemite National Park, California. Peak, 11,005 feet altitude, and lake near Tower Rock. #1:/Yosemite National Park/thw00048 ID. Turner, H.W. 48 Yosemite National Park, California. Boulder of igneous puddingstone on a ridge north of Yosemite Valley. It measures 25 centimeters long. The nodules are diorite, and the matrix is biotite-granite. July 29, 1897. #1:/Yosemite National Park/thw00049 ID. Turner, H.W. 49 Yosemite National Park, California. Weathering of biotite-granite on the ridge south of Morrison Creek. #1:/Yosemite National Park/thw00050 ID. Turner, H.W. 50 Yosemite National Park, California. Rock basin 1 meter in diameter formed in biotite-granite by weathering processes and not by running water. August 1897. #1:/Yosemite National Park/thw00055 ID. Turner, H.W. 55 Yosemite National Park, California. Granite boulders resulting from the decomposition of rock in a place near White Wolf. #1:/Yosemite National Park/thw00056 ID. Turner, H.W. 56 Yosemite National Park, California. Erratic granite boulders resting on granite on a spur on the south side of Tuolumne Canyon, about due north of Hog Ranch. #1:/Yosemite National Park/thw00111 ID. Turner, H.W. 111 Yosemite National Park, California. Blocks of exfoliating granite on the slope northwest of Grouse Lake. The blocks have been fractured and displaced by the action of frost. #1:/Yosemite National Park/thw00112 ID. Turner, H.W. 112 Yosemite National Park, California. Exfoliating granite at Royal Arch Lake. #1:/Taff J.A. Collection/tja00015 ID. Taff, J.A. 15 Fossil Coal Tree.S.E. Corner of Sec 36, 1N., 9E Coalgate Quad. 4 miles S.E. of Coalgate, Indian Territory (Oklahoma). ca 1900. Figure 4 in U.S. Geological Survey. Folio 74. 1901. #1:/Okalhoma-Folio 74/tja00016 ID. Taff, J.A. 16 Cast of trunk of a tree (Sigillaria) found in Savanna sandstone, 4 miles southwest of Coalgate. Coal County, Oklahoma [Indian Territory]. 1901. Figure 5 in U.S. Geological Survey. Folio 74. 1901. #1:/Taff J.A. Collection/tja00020 ID. Taff, J.A. 20 Choctaw Indian Family, Savanna, Indian Territory (Oklahoma). ca 1900. #1:/Louisiana-Arkansas-Professional paper 46/tja00107 ID. Taff, J.A. 107 Bluff at White Cliffs Landing, showing contact between the Annona chalk and the Brownstown formation, outcrops of the Brownstown, Annona and Nacatoch formations. Little River County, Arkansas circa 1901. Plate 12-A in U.S. Geological Survey. Professional paper 46. 1906. #1:/Louisiana-Arkansas-Professional paper 46/tja00132 ID. Taff, J.A. 132 Gypsum bed at Plaster Bluff, on Little Missouri River, 3 miles south of Murfreesboro, an outcrop of the Trinity formation. Pike County, Arkansas. circa 1901. Plate 5-A in U.S. Geological Survey. Professional paper 46. 1906. #1:/Oklahoma-Indian Territory-Professional paper 31/tja00183 ID. Taff, J.A. 183 "Red beds" conglomerate on granite-porphyry at east end if Carlton Mountains. Comanche County, Oklahoma [Indian Territory]. Circa 1900. Plate 8-B in U.S. Geological Survey. Professional paper 31. 1904. #1:/Oklahoma-Indian Territory-Professional paper 31/tja00185 ID. Taff, J.A. 185 Form a panorama of Medicine Bluff, north side of Carlton Mountains. 1.5 miles west of Fort Sill. Comanche County, Oklahoma [Indian Territory]. Circa 1900. Plate 7 in U.S. Geological Survey. Professional paper 31. 1904. #1:/Oklahoma-Indian Territory-Professional paper 31/tja00186 ID. Taff, J.A. 186 Form a panorama of Medicine Bluff, north side of Carlton Mountains. 1.5 miles west of Fort Sill. Comanche County, Oklahoma [Indian Territory]. Circa 1900. Plate 7 in U.S. Geological Survey. Professional paper 31. 1904. #1:/Oklahoma-Indian Territory-Professional paper 31/tja00206 ID. Taff, J.A. 206 Granite boulders in the east slope of Mount Scott. Comanche County, Oklahoma [Indian Territory]. Circa 1900. Plate 5-B in U.S. Geological Survey. Professional paper 31. 1904. #1:/Oklahoma-Indian Territory-Professional paper 31/tja00211 ID. Taff, J.A. 211 Cambrian sandstone on granite-porphyry east of Blue Creek canyon. Comanche County, Oklahoma [Indian Territory]. Circa 1900. Plate 8-A in U.S. Geological Survey. Professional paper 31. 1904. #1:/Oklahoma-Indian Territory-Professional paper 31/tja00216 ID. Taff, J.A. 216 Northwest end of the Wichita Mountains, showing sharp mountain crests and embayment of "Red Beds". Comanche County, Oklahoma [Indian Territory]. circa 1900. Plate 4-B in U.S. Geological Survey. Professional paper 31. 1904. #1:/Oklahoma-Indian Territory-Professional paper 31/tja00220 ID. Taff, J.A. 220 Rainy Mountain, an Ordovician limestone knob in the "red bed" plain. Kiowa County, Oklahoma [Indian Territory]. circa 1900. Plate 5-A in U.S. Geological Survey. Professional paper 31. 1904. #1:/Oklahoma-Indian Territory-Professional paper 31/tja00229 ID. Taff, J.A. 229 Exfoliate weathering of granite boulder south side of Quartz Mountain NE 1/4 sec. 23 T. 5 N., R. 20 W. Greer County, Oklahoma [Indian Territory]. Circa 1900. Plate 6-B in U.S. Geological Survey. Professional paper 31. 1904. #1:/Oklahoma-Indian Territory-Professional paper 31/tja00230 ID. Taff, J.A. 230 Southwestern knob of Quartz Mountain. Showing abrupt ascent from the level plain. Near center sec. 20, T.5 N., R. 20 W. Greer County, Oklahoma [Indian Territory]. circa 1900. Plate 4-A in U.S. Geological Survey. Professional paper 31. 1904. #1:/Oklahoma-Indian Territory-Professional paper 31/tja00235 ID. Taff, J.A. 235 Exfoliate weathering of Granite Mountain 3 miles northwest of Snyder. Kiowa County, Oklahoma [Indian Territory]. Circa 1900. Plate 6-A in U.S. Geological Survey. Professional paper 31. 1904. #1:/Loma Prieta, California, Earthquake October 17, 1989/tjc00001 ID. Tinsley, J.C. 1ct Loma Prieta, California, Earthquake October 17, 1989. Sand volcano or "sand boil" measuring 2 meters (6.6 feet) in length erupted in the median of Interstate 80 west of the San Francisco-Oakland Bay Bridge toll plaza. Ground shaking transformed a loose water-saturated deposit of subsurface sand into a sand-water slurry (liquefaction). The vented sand contains marine shell fragments. Slide II-3, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/tjc00003 ID. Tinsley, J.C. 3ct Loma Prieta, California, Earthquake October 17, 1989. Santa Cruz Area. Landslide-displaced trees reflect earthquake-triggered slope failure along a coastal bluff in the New Brighton Beach area. Slide XIII-12, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/tjc00004 ID. Tinsley, J.C. 4ct Loma Prieta, California, Earthquake October 17, 1989. Watsonville area. Liquefaction in recent deposits of the Pajaro River formed these sand volcanoes along extensional fissures in a field near Pajaro prepared for autumn planting. Furrows are spaced about 1.2 meters (4 feet) apart. Slide XIV-1, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/tjc00005 ID. Tinsley, J.C. 5ct Loma Prieta, California, Earthquake October 17, 1989. Watsonville area. Vent of a sand volcano produced by liquefaction is about 4 feet across. The strip spanning the vent is a conduit for the drip irrigation system. The furrow spacing in the strawberry field is about 4 feet on center. Slide XIV-2, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/tjc00006 ID. Tinsley, J.C. 6ct Loma Prieta, California, Earthquake October 17, 1989. Watsonville area. Liquefaction in recent deposits of the Pajaro River formed sand volcanoes along a fissure 6 to 7 meters (19.7 to 23 feet) in length. The variation in grain size and the partial erosion of the conical deposits of sand show that the venting of the slurry of sand and water was a complex series of depositional and erosional events triggered by the main shock and renewed by principal aftershocks in some instances. Slide XIV-3, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/tjc00007 ID. Tinsley, J.C. 7ct Loma Prieta, California, Earthquake October 17, 1989. Watsonville area. Structural failure of the twin bridges carrying Highway 1 across Struve Slough. 1989. Slide XIV-11, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/tjc00008 ID. Tinsley, J.C. 8ct Loma Prieta, California, Earthquake October 17, 1989. Moss Landing. Liquefaction and subsequent strong tidal action destroyed the causeway carrying the Moss Beach access road across the tidewater basin. Slide XV-1, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/tjc00009 ID. Tinsley, J.C. 9ct Loma Prieta, California, Earthquake October 17, 1989. Moss Landing. Damaged approach and abutment of the bridge linking the Moss Landing spit to the mainland near the Moss Landing Marine Laboratory. Liquefaction of the beach and Salinas River deposits caused ground cracking and differential settlement. Slide XV-2, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/tjc00010 ID. Tinsley, J.C. 10ct Loma Prieta, California, Earthquake October 17, 1989. Salinas. Partially razed earthquake-damaged unreinforced masonry buildings in Old Town historical district. Slide XVI-1, U.S. Geological Survey Open-File Report 90-547. #1:/Lake Nyos, Cameroon, Gas Release August 21, 1986/tml00015 ID. Tuttle, M.L. 15ct Lake Nyos, Cameroon, Gas Release August 21, 1986. Promontory on the southwest side of Lake Nyos with vegetation damage 80 meters above water level. The damage was caused by the water surge which followed the emergence of the toxic gas cloud. August 29, 1986. #1:/Lake Nyos, Cameroon, Gas Release August 21, 1986/tml00016 ID. Tuttle, M.L. 16ct Lake Nyos, Cameroon, Gas Release August 21, 1986. Inflow region on the south side of Lake Nyos scoured by the water surge which followed the emergence of the toxic gas cloud. This is the source of vegetation seen floating on the lake. August 29, 1986. #1:/Lake Nyos, Cameroon, Gas Release August 21, 1986/tml00022 ID. Tuttle, M.L. 22ct Lake Nyos, Cameroon, Gas Release August 21, 1986. Storm moving into the Lake Nyos area. The lake is in the foreground. September 1, 1986. #1:/Lake Nyos, Cameroon, Gas Release August 21, 1986/tml00035 ID. Tuttle, M.L. 35ct Lake Nyos, Cameroon, Gas Release August 21, 1986. Dead cattle and surrounding compounds in Nyos village. September 3, 1986. #1:/Lake Nyos, Cameroon, Gas Release August 21, 1986/tml00038 ID. Tuttle, M.L. 38ct Lake Nyos, Cameroon, Gas Release August 21, 1986. Dead cattle and surrounding compounds in Nyos village. September 3, 1986. #1:/Crater Lake National Park/topa0035 ID. Topography A 35 Crater Lake National Park, Oregon. Palisade, looking toward Llao Rock in the northeast quadrant of the crater. Photo by P. Chapman, 1909. #1:/Crater Lake National Park/topa0036 ID. Topography A 36 Crater Lake National Park, Oregon. Mount Scott, the highest point in the park, viewed from the west. Photo by P. Chapman, 1909. #1:/Crater Lake National Park/topa0037 ID. Topography A 37 Crater Lake National Park, Oregon. Red Cone, viewed from the northwest. Photo by P. Chapman, 1909. #1:/Crater Lake National Park/topa0040 ID. Topography A 40 Crater Lake National Park, Oregon. Hemlock forest on the west side of the park. Photo by P. Chapman, 1909. #1:/Sequoia National Park/topa0055 ID. Topography A 55 Sequoia National Park, California. Tehipite Dome. Photo by R.B. Marshall, 1909. #1:/Topography Collection-Sequoia and Kings Canyon National Park/topa0056 ID. Topography A 56 Man possibly setting a blasting charge, at end of government road in Sequoia and Kings Canyon National Park. Tulare County, California. 1909. #1:/Topography Collection-Sequoia and Kings Canyon National Park/topa0058 ID. Topography A 58 Workers with, small dog, on new road in Sequoia and Kings Canyon National Park. Tulare County, California. 1909. #1:/Topography Collection-Sequoia and Kings Canyon National Park/topa0060 ID. Topography A 60 Men examining new road in Sequoia and Kings Canyon National Park. Tulare County, California. 1909. #1:/Topography Collection-Sequoia and Kings Canyon National Park/topa0061 ID. Topography A 61 View down new road showing curve around a tree in Sequoia and Kings Canyon National Park. Tulare County, California. 1909. #1:/Marshell R.B. Collection-Sequoia and Kings Canyon National Park/topa0064 ID. Topography A 64 General Sherman in giant forest. Tree contains most lumber in the world. Photo by R.B. Marshell. Sequoia and Kings Canyon National Park. Tulare County, California. 1909. #1:/Marshell R.B. Collection-Sequoia and Kings Canyon National Park/topa0065 ID. Topography A 65 Little sequoias on lower trail from General Grant Park to kings river canyon near Tenmile Lake looking east. Photo by R.B. Marshell. Sequoia and Kings Canyon National Park. Tulare County, California. 1909. #1:/Yosemite National Park/topa0068 ID. Topography A 68 Yosemite National Park, California. Ferns and trees in Hetch Hetchy Valley. Circa 1914. #1:/Yosemite National Park/topa0069 ID. Topography A 69 Yosemite National Park, California. North end of Tenaya Lake, showing pack train on rock wall-supported road. 1906. #1:/Yosemite National Park/topa0070 ID. Topography A 70 Yosemite National Park, California. Pack train in Hetch Hetchy Valley. 1906. #1:/Yosemite National Park/topa0071 ID. Topography A 71 Yosemite National Park, California. Half Dome, viewed from Panorama Point. U.S. Geological Survey Director George Otis Smith in the right foreground. 1906. #1:/Yosemite National Park/topa0072 ID. Topography A 72 Yosemite National Park, California. Top part of El Capitan. 1906. #1:/Yosemite National Park/topa0074 ID. Topography A 74 Yosemite National Park, California. Vernal Fall, viewed from bridge below the falls. 1906. #1:/Yosemite National Park/topa0076 ID. Topography A 76 Yosemite National Park, California. Tourists on a bridge across the Merced River between Vernal and Nevada Falls. 1906. #1:/Yosemite National Park/topa0078 ID. Topography A 78 Yosemite National Park, California. Cabin in Aspen Valley. 1909. #1:/Yosemite National Park/topa0080 ID. Topography A 80 Yosemite National Park, California. Entrance to Le Conte Memorial Lodge. 1909. #1:/Yosemite National Park/topa0081 ID. Topography A 81 Yosemite National Park, California. Tie Sing, a 21-year veteran cook of the U.S. Geological Survey, in the field. 1909. #1:/Yosemite National Park/topa0082 ID. Topography A 82 Yosemite National Park, California. West from Monument 80, north boundary, at Dorothy Lake. 1906. #1:/Yosemite National Park/topa0083 ID. Topography A 83 Yosemite National Park, California. West near Monument 80 toward Dorothy Lake. 1906. #1:/Yosemite National Park/topa0084 ID. Topography A 84 Yosemite National Park, California. East to the Divide where Monument 80 is located. Dorothy Lake in the foreground. 1906. #1:/Yosemite National Park/topa0086 ID. Topography A 86 Yosemite National Park, California. South from Monument 80 toward Forsyth Peak. 1906. #1:/Yosemite National Park/topa0098 ID. Topography A 98 Yosemite National Park, California. Northeast on the floor of the Hetch Hetchy Valley, showing Kolana Rock. 1906. #1:/Yosemite National Park/topa0099 ID. Topography A 99 Yosemite National Park, California. Live oaks and ferns on the floor of Hetch Hetchy Valley. 1906. #1:/Yosemite National Park/topa0100 ID. Topography A 100 Yosemite National Park, California. Falls in the Tuolumne River between Hetch Hetchy and Little Hetch Hetchy. 1906. #1:/Yosemite National Park/topa0101 ID. Topography A 101 Yosemite National Park, California. Wapama Falls, looking directly north from the south side of Hetch Hetchy Valley. 1906. #1:/Yosemite National Park/topa0102 ID. Topography A 102 Yosemite National Park, California. Northeast, showing the floor of Hetch Hetchy Valley. 1906. #1:/Yosemite National Park/topa0103 ID. Topography A 103 Yosemite National Park, California. Toward Kolana Rock with the Tuolumne River in the foreground. Kolana Rock is 2100 feet above the valley floor and is as grand a specimen of exposed rock as is to be found in the Sierra with the exception of El Capitan. 1906. #1:/Yosemite National Park/topa0104 ID. Topography A 104 Yosemite National Park, California. Hetch Hetchy Valley. Rancheria Mountain in the distance. View is northeast. 1906. #1:/Yosemite National Park/topa0105 ID. Topography A 105 Yosemite National Park, California. Wapama Falls at the foot of the cliff, viewed from the trail to Lake Eleanor. 1906. #1:/Yosemite National Park/topa0106 ID. Topography A 106 Yosemite National Park, California. Hetch Hetchy Valley. View is east to Kolana Rock(?). 1906. #1:/Yosemite National Park/topa0107 ID. Topography A 107 Yosemite National Park, California. Hetch Hetchy Valley, viewed from the trail to Lake Eleanor near the proposed dam site. View is northeast. 1906. #1:/Yosemite National Park/topa0108 ID. Topography A 108 Yosemite National Park, California. Live oak on the west side of the Tuolumne River near the proposed dam site. 1906. #1:/Yosemite National Park/topa0109 ID. Topography A 109 Yosemite National Park, California. View is northeast in Hetch Hetchy Valley. Photo by J.N. LeConte, 1906. #1:/Yosemite National Park/topa0110 ID. Topography A 110 Yosemite National Park, California. View is east near the center of Hetch Hetchy Valley, showing beautiful camp possibilities. Photo by J.N. LeConte, 1906. #1:/Yosemite National Park/topa0111 ID. Topography A 111 Yosemite National Park, California. Wapama Falls, viewed from the south side of the Tuolumne River. Photo by J.N. LeConte, 1906. #1:/Yosemite National Park/topa0112 ID. Topography A 112 Yosemite National Park, California. Tuolumne River, viewed from the center of Hetch Hetchy Valley. Photo by J.N. LeConte, 1906. #1:/Yosemite National Park/topa0113 ID. Topography A 113 Yosemite National Park, California. Looking south at Kolana Rock in the distance. Magnificent live oaks, ferns, etc. in Hetch Hetchy Valley. 1906. #1:/Yosemite National Park/topa0114 ID. Topography A 114 Yosemite National Park, California. A composite image: the top half is Half Dome; the bottom is the corresponding section of a topographic map. 1906. First displayed as part of the U.S. Geological Survey exhibit at the Panama- Pacific Exposition in San Francisco in 1915. #1:/Yosemite National Park/topa0115 ID. Topography A 115 Yosemite National Park, California. A composite image: the top half is a view toward Half Dome with El Capitan on the left and Bridalveil Fall on the right; the bottom is the corresponding section of a topographic map. 1906. #1:/Yosemite National Park/topa0117 ID. Topography A 117 Yosemite National Park, California. On the summit of Post Peak, a topographer at work with a planetable tied in place to keep it stationary. 1906. #1:/Mesa Verde National Park/topa0168 ID. Topography A 168 Mesa Verde National Park, Colorado. Point Lookout. Photo by R.W. Berry, 1931. #1:/Mesa Verde National Park/topa0169 ID. Topography A 169 Mesa Verde National Park, Colorado. Point Lookout and Lone Cone, viewed from the north face of the mesa. Photo by R.W. Berry, 1931. #1:/Mesa Verde National Park/topa0170 ID. Topography A 170 Mesa Verde National Park, Colorado. Lone Cone and Knife Edge on the north face of the mesa. 1931. #1:/Mesa Verde National Park/topa0172 ID. Topography A 172 Mesa Verde National Park, Colorado. Cliffs near the head of Prater Canyon on the north face of the mesa. Photo by R.W. Berry, 1931. #1:/Mesa Verde National Park/topa0173 ID. Topography A 173 Mesa Verde National Park, Colorado. Government road under construction beneath Knife Edge. Photo by R.W. Berry, 1931. #1:/Mesa Verde National Park/topa0174 ID. Topography A 174 Mesa Verde National Park, Colorado. Park Point and cliffs on the north face of the mesa, viewed from a point on Prater Trail. Photo by R.W. Berry, 1931. #1:/Mesa Verde National Park/topa0175 ID. Topography A 175 Mesa Verde National Park, Colorado. Long Spur and Valley, viewed from the north face of the mesa. Photo by R.W. Berry, 1931. #1:/Mesa Verde National Park/topa0177 ID. Topography A 177 Mesa Verde National Park, Colorado. Long Spur, viewed from Krueger Point. Photo by R.W. Berry, 1931. #1:/Mesa Verde National Park/topa0180 ID. Topography A 180 Mesa Verde National Park, Colorado. Mancos Canyon, viewed from the foot of White's Trail. Photo by R.W. Berry, 1931. #1:/Mesa Verde National Park/topa0183 ID. Topography A 183 Mesa Verde National Park, Colorado. Waters' cabin near the head of Waters' Canyon. Photo by R.W. Berry, 1931. #1:/Mesa Verde National Park/topa0184 ID. Topography A 184 Mesa Verde National Park, Colorado. Morfield Canyon, viewed from Ute Trail. Photo by R.W. Berry, 1931. #1:/Mesa Verde National Park/topa0185 ID. Topography A 185 Mesa Verde National Park, Colorado. Prater Canyon, viewed from Ute Trail. Photo by R.W. Berry, 1931. #1:/Mesa Verde National Park/topa0186 ID. Topography A 186 Mesa Verde National Park, Colorado. Prater Canyon, viewed from a ridge to the west. Photo by R.W. Berry, 1931. #1:/Mesa Verde National Park/topa0188 ID. Topography A 188 Mesa Verde National Park, Colorado. Rock split by a pinon tree near the head of Prater Canyon. Mapping party on horseback. Photo by R.W. Berry, 1931. #1:/Mesa Verde National Park/topa0190 ID. Topography A 190 Mesa Verde National Park, Colorado. Knife Edge at the head of Prater Canyon. Photo by R.W. Berry, 1910 #1:/Mesa Verde National Park/topa0191 ID. Topography A 191 Mesa Verde National Park, Colorado. Soda Canyon, viewed from Battleship Rock. Photo by R.W. Berry, 1931. #1:/Mesa Verde National Park/topa0192 ID. Topography A 192 Mesa Verde National Park, Colorado. Little Soda Canyon, viewed from Battleship Rock. Photo by R.W. Berry, 1931. #1:/Mesa Verde National Park/topa0194 ID. Topography A 194 Mesa Verde National Park, Colorado. Battleship Rock, viewed from the forks of Soda Canyon and Little Soda Canyon. Photo by R.W. Berry, 1931. #1:/Mesa Verde National Park/topa0200 ID. Topography A 200 Mesa Verde National Park, Colorado.U.S. Geological Survey camp at Government Well in Little Soda Canyon. Photo by R.W. Berry, 1931. #1:/Mesa Verde National Park/topa0201 ID. Topography A 201 Mesa Verde National Park, Colorado. Snow flurry at the U.S. Geological Survey camp at Government Well in Little Soda Canyon. Photo by R.W. Berry, 1931. #1:/Mesa Verde National Park/topa0202 ID. Topography A 202 Mesa Verde National Park, Colorado. Government Well in Little Soda Canyon. Photo by R.W. Berry, 1931. #1:/Mesa Verde National Park/topa0206 ID. Topography A 206 Mesa Verde National Park, Colorado. Moving the stove and packing it on "Spot" in Prater Canyon. Photo by R.W. Berry, 1931. #1:/Mesa Verde National Park/topa0210 ID. Topography A 210 Mesa Verde National Park, Colorado. Echo Cliff(?) at the fork of Navajo Canyon. Photo by R.W. Berry, 1931. #1:/Mesa Verde National Park/topa0211 ID. Topography A 211 Mesa Verde National Park, Colorado. Spruce Tree Canyon, viewed from Spruce Tree House. Photo by R.W. Berry, 1931. #1:/Mesa Verde National Park/topa0212 ID. Topography A 212 Mesa Verde National Park, Colorado. Head of Spruce Tree Canyon, showing government reservoir and ranger cabin. Photo by R.W. Berry, 1931. #1:/Mesa Verde National Park/topa0213 ID. Topography A 213 Mesa Verde National Park, Colorado. Spruce Tree House, viewed from the rim of the opposite canyon. Photo by R.W. Berry, 1931. #1:/Mesa Verde National Park/topa0216 ID. Topography A 216 Mesa Verde National Park, Colorado. Spruce Tree House, viewed from the north end. Photo by R.W. Berry, 1931. #1:/Mesa Verde National Park/topa0217 ID. Topography A 217 Mesa Verde National Park, Colorado. Spruce Tree House, viewed from the south end. Photo by R.W. Berry, 1931. #1:/Mesa Verde National Park/topa0219 ID. Topography A 219 Mesa Verde National Park, Colorado. Cliff dwellings just below the mouth of Little Moccasin Canyon. Photo by R.W. Berry, 1931. #1:/Mesa Verde National Park/topa0220 ID. Topography A 220 Mesa Verde National Park, Colorado. Cliff dwellings near the mouth of Little Moccasin Canyon. Photo by R.W. Berry, 1931. #1:/Mesa Verde National Park/topa0223 ID. Topography A 223 Mesa Verde National Park, Colorado. Peabody House (Square Tower House?) in Navajo Canyon. Photo by R.W. Berry, 1931. #1:/Mesa Verde National Park/topa0224 ID. Topography A 224 Mesa Verde National Park, Colorado. Peabody House (Square Tower House?) in Navajo Canyon. Photo by R.W. Berry, 1931. #1:/Mesa Verde National Park/topa0225 ID. Topography A 225 Mesa Verde National Park, Colorado. North End of Balcony House. Photo by R.W. Berry, 1931. #1:/Mesa Verde National Park/topa0226 ID. Topography A 226 Mesa Verde National Park, Colorado. South end of Balcony House. Photo by R.W. Berry, 1931. #1:/Mesa Verde National Park/topa0227 ID. Topography A 227 Mesa Verde National Park, Colorado. Soda Canyon, viewed from Balcony House. Photo by R.W. Berry, 1931. #1:/Mesa Verde National Park/topa0228 ID. Topography A 228 Mesa Verde National Park, Colorado. Ancient entrance to Cliff Palace. Photo by R.W. Berry, 1931. #1:/Mesa Verde National Park/topa0229 ID. Topography A 229 Mesa Verde National Park, Colorado. Cliff Palace, viewed from a promontory at the south end. Photo by R.W. Berry, 1931. #1:/Mesa Verde National Park/topa0230 ID. Topography A 230 Mesa Verde National Park, Colorado. North end of Cliff Palace. Photo by R.W. Berry, 1931. #1:/Mesa Verde National Park/topa0231 ID. Topography A 231 Mesa Verde National Park, Colorado. Cliff Palace, viewed from a promontory at the north end. Photo by R.W. Berry, 1931. #1:/Mesa Verde National Park/topa0232 ID. Topography A 232 Mesa Verde National Park, Colorado. Cliff Canyon, viewed from Cliff Palace. Photo by R.W. Berry, 1931. #1:/Mesa Verde National Park/topa0233 ID. Topography A 233 Mesa Verde National Park, Colorado. Tourists at a camp in Prater Canyon en route to ruins. Photo by R.W. Berry, 1931. #1:/Glacier National Park/topa0234 ID. Topography A 234 Glacier National Park, Montana. Looking up Gunsight Pass. 1910. #1:/Topography Collection-Glacier National Park and Preserve/topa0236 ID. Topography A 236 Map of proposed Glacier National Park and Preserve, Montana and adjoining mountain region in Canada. Watermark "Commercial Linen" shows through. Photograph made from original drawing in R.B. Marshall's office. 1911. #1:/Yosemite National Park/topa0248 ID. Topography A 248 Yosemite National Park, California. Half Dome, Mirror Lake, and Tenaya Canyon. Photo by C.L. Seavey, 1909. #1:/Yosemite National Park/topa0250 ID. Topography A 250 Yosemite National Park, California. Horsetail Falls in Yosemite Valley. #1:/Glacier National Park/topa0262 ID. Topography A 262 Glacier National Park, Montana. Cliffs on the northeast side of Avalanche Lake, east end. Photo by B. Willis. August 1901. #1:/Yosemite National Park/topa0266 ID. Topography A 266 Yosemite National Park, California. Water erosion on the Tuolumne River just above California Falls. Photo by R.B. Marshall. 1898. #1:/Yosemite National Park/topa0267 ID. Topography A 267 Yosemite National Park, California. California Falls on the Tuolumne River. Photo by R.B. Marshall. 1898. #1:/Yosemite National Park/topa0268 ID. Topography A 268 Yosemite National Park, California. White Cascade on the Tuolumne River. Photo by R.B. Marshall, 1898. #1:/Yosemite National Park/topa0271 ID. Topography A 271 Yosemite National Park, California. Columbia Finger. Photo by R.B. Marshall, 1898. #1:/Yosemite National Park/topa0272 ID. Topography A 272 Yosemite National Park, California. Cathedral Peak. Photo by R.B. Marshall, 1898. #1:/Yosemite National Park/topa0276 ID. Topography A 276 Yosemite National Park, California. Hetch Hetchy Valley, viewed from the west at LeConte Point. Photo by R.B. Marshall, 1898. #1:/Yosemite National Park/topa0277 ID. Topography A 277 Yosemite National Park, California. Wapama Falls, viewed from the floor of Hetch Hetchy valley. Photo by R.B. Marshall, 1898. #1:/Yosemite National Park/topa0278 ID. Topography A 278 Yosemite National Park, California. East wall of Mount Conness. Photo by R.B. Marshall, 1898. #1:/Mesa Verde National Park/topa0444 ID. Topography A 444 Mesa Verde National Park, Colorado. Horse Springs. Photo by R.W. Berry, 1911. #1:/Mesa Verde National Park/topa0450 ID. Topography A 450 Mesa Verde National Park, Colorado. North end of Mug House. Photo by R.W. Berry, 1911. #1:/Mesa Verde National Park/topa0452 ID. Topography A 452 Mesa Verde National Park, Colorado. Junction of Navajo Canyon and Wickiup Canyon. Photo by R.W. Berry, 1911 #1:/Mesa Verde National Park/topa0453 ID. Topography A 453 Mesa Verde National Park, Colorado. East end of Willow House. Photo by R.W. Berry, 1911. #1:/Mesa Verde National Park/topa0454 ID. Topography A 454 Mesa Verde National Park, Colorado. Painted House. Photo by R.W. Berry, 1911. #1:/Mesa Verde National Park/topa0455 ID. Topography A 455 Mesa Verde National Park, Colorado. Pictographs in Painted House. Photo by R.W. Berry, 1911. #1:/Mesa Verde National Park/topa0457 ID. Topography A 457 Mesa Verde National Park, Colorado. Cliff dwelling in Pony Canyon. Photo by R.W. Berry, 1911. #1:/Mesa Verde National Park/topa0458 ID. Topography A 458 Mesa Verde National Park, Colorado. Two-story house in Horse Canyon. Photo by R.W. Berry, 1911. #1:/Mesa Verde National Park/topa0459 ID. Topography A 459 Mesa Verde National Park, Colorado. South end of Mug House. Photo by R.W. Berry, 1911. #1:/Mesa Verde National Park/topa0460 ID. Topography A 460 Mesa Verde National Park, Colorado. South end of Balcony House after repairs. Photo by R.W. Berry, 1911. #1:/Mesa Verde National Park/topa0461 ID. Topography A 461 Mesa Verde National Park, Colorado. North end of Balcony House after repairs. Photo by R.W. Berry, 1911. #1:/Mesa Verde National Park/topa0463 ID. Topography A 463 Mesa Verde National Park, Colorado. Watch Tower in Navajo Canyon. Photo by R.W. Berry, 1911. #1:/Mesa Verde National Park/topa0466 ID. Topography A 466 Mesa Verde National Park, Colorado. Ute Springs. Photo by R.W. Berry, 1911. #1:/Mesa Verde National Park/topa0492 ID. Topography A 492 Mesa Verde National Park, Colorado. Central part of Cliff Palace. Photo by R.W. Berry, 1911. #1:/Mesa Verde National Park/topa0493 ID. Topography A 493 Mesa Verde National Park, Colorado. South end of Cliff Palace. Photo by R.W. Berry, 1911. #1:/Mesa Verde National Park/topa0494 ID. Topography A 494 Mesa Verde National Park, Colorado. North end of Cliff Palace. Photo by R.W. Berry, 1911. #1:/Mesa Verde National Park/topa0497 ID. Topography A 497 Mesa Verde National Park, Colorado. Government road on Chapin Mesa. Photo by R.W. Berry, 1911. #1:/Mesa Verde National Park/topa0498 ID. Topography A 498 Mesa Verde National Park, Colorado. Balcony House. Photo by R.W. Berry, 1911. #1:/Mesa Verde National Park/topa0499 ID. Topography A 499 Mesa Verde National Park, Colorado. South end of Cliff Palace. Photo by R.W. Berry, 1911. #1:/Mesa Verde National Park/topa0501 ID. Topography A 501 Mesa Verde National Park, Colorado. Soda Canyon, viewed from Balcony House. Photo by R.W. Berry, 1911. #1:/Mesa Verde National Park/topa0502 ID. Topography A 502 Mesa Verde National Park, Colorado. Government Well at the head of Little Soda Canyon. Photo by R.W. Berry, 1911. #1:/Mesa Verde National Park/topa0504 ID. Topography A 504 Mesa Verde National Park, Colorado. Point Lookout, viewed from the valley. Photo by R.W. Berry, 1911. #1:/Rocky Mountain National Park/topa0521 ID. Topography A 521 Rocky Mountain National Park, Colorado. Elephant Rocks (Lumpy Ridge?) immediately north of Estes Park Valley. Photo by R.B. Marshall, 1912. #1:/Rocky Mountain National Park/topa0523 ID. Topography A 523 Rocky Mountain National Park, Colorado. Club house on the north shore of Grand Lake. Photo by R.B. Marshall, 1912. #1:/Rocky Mountain National Park/topa0524 ID. Topography A 524 Rocky Mountain National Park, Colorado. Main Street in Estes Park. Photo by R.B. Marshall, 1912. #1:/Rocky Mountain National Park/topa0526 ID. Topography A 526 Rocky Mountain National Park, Colorado. Longs Peak, elevation 14,225 feet, 4 miles distant, viewed from near E.A. Mills' workshop at Longs Peak Inn. Photo by R.B. Marshall, 1912. #1:/Rocky Mountain National Park/topa0527 ID. Topography A 527 Rocky Mountain National Park, Colorado. Longs Peak, viewed from the Rustic Hotel. Photo by R.B. Marshall, 1912. #1:/Rocky Mountain National Park/topa0528 ID. Topography A 528 Rocky Mountain National Park, Colorado. Longs Peak, viewed from E.A. Mills' old cabin near Longs Peak Inn. Photo by R.B. Marshall, 1912. #1:/Rocky Mountain National Park/topa0534 ID. Topography A 534 Rocky Mountain National Park, Colorado. Estes Cone. Photo by R.B. Marshall, 1912. #1:/Rocky Mountain National Park/topa0535 ID. Topography A 535 Rocky Mountain National Park, Colorado. The Rustic Hotel in Estes Park. Photo by R.B. Marshall, 1912. #1:/Rocky Mountain National Park/topa0538 ID. Topography A 538 Rocky Mountain National Park, Colorado. Automobile route along Tombstone Ridge. Elevation about 12,000 feet. Photo by R.B. Marshall, 1912. #1:/Rocky Mountain National Park/topa0540 ID. Topography A 540 Rocky Mountain National Park, Colorado. Along the proposed road over Tombstone Ridge. Photo by R.B. Marshall, 1912. #1:/Rocky Mountain National Park/topa0543 ID. Topography A 543 Rocky Mountain National Park, Colorado. Iceberg Lake on Tombstone Ridge. Elevation 11,000 feet. Photo by R.B. Marshall, 1912. #1:/Death Valley National Park/topa0590 ID. Topography A 590 Death Valley National Park, California.U.S. Geological Survey party determining the elevation of the lowest point in the United States, Death Valley, California, 276 feet below sea level, by a spirit level line. L.F. Biggs and party. January 1907. Plate 7-T, U.S. Geological Survey Bulletin 817. #1:/Kings Canyon National Park/topa0621 ID. Topography A 621 Kings Canyon National Park, California. Tehipite Dome, viewed from the floor of Tehipite Valley. Photo by J.N. LeConte. #1:/Glacier National Park/topa0675 ID. Topography A 675 Glacier National Park, Montana. Climbing one of the steep faces of Blackfoot Glacier. Citadel Mountain on the left. Pre-1914. #1:/Glacier National Park/topa0676 ID. Topography A 676 Glacier National Park, Montana. Gunsight Lake and Mount Jackson, viewed from Gunsight Mountain. Gunsight Pass on the extreme right. The trail follows the south side of the lake and then climbs at about the upper limit of the shadow. Pre-1914. #1:/Glacier National Park/topa0678 ID. Topography A 678 Glacier National Park, Montana. Citadel Mountain, viewed from near a Blackfoot Glacier crevasse. Pre-1914. #1:/Rocky Mountain National Park/topa0696 ID. Topography A 696 Rocky Mountain National Park, Colorado. Longs Peak. Photo by G.E. Mitchell, (Director's secretary), 1914. #1:/Grand Canyon National Park/topa0738 ID. Topography A 738 Grand Canyon National Park, Arizona.R.N. Chaddock and water truck. Photo by R.T.Evans, September 4, 1921. #1:/Grand Canyon National Park/topa0739 ID. Topography A 739 Grand Canyon National Park, Arizona. North-eastward across Elliott Bay. Photo by R.T.Evans, July 28, 1921. #1:/Yosemite National Park/topab250 ID. Topography A 250bw Yosemite National Park, California. Horsetail Falls. #1:/Yosemite National Park/topab268 ID. Topography A 268bw Yosemite National Park, California. Lake Eleanor, viewed from the tram near its outlet, looking northeast. Photo by R.B. Marshall, 1896. #1:/California/topc0008 ID. Topography C 8 Flowing oil well and oil reservoir at Maricopa. Photo by G.R. Davis, topographer. Bakerfield Quadrangle. Kern County, California. 1908. #1:/San Francisco, California, Earthquake April 18, 1906/topc0009 ID. Topography C 9 San Francisco Earthquake April 18, 1906. Ellis Street, soon after the fire of April 18, 1906. Photo by G.R. Davis, topographer. San Francisco Quadrangle. San Francisco County, California. April, 1906. #1:/Grand Canyon National Park/topd0009 ID. Topography D 9 Grand Canyon National Park, Arizona. At Lees Ferry, left to right: L. Lint, H.C. Blake, Frank Word, C.H. Birdseye, Moore, Burchard, Lame, Freeman, and Kolb. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/topd0015 ID. Topography D 15 Grand Canyon National Park, Arizona. Placid stretch of the Colorado River near the head of Marble Canyon. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/topd0020 ID. Topography D 20 Grand Canyon National Park, Arizona. The boat "Glen" in Soap Creek rapid. H.E. Blake, in the cockpit, has about his neck an inflated rubber life preserver, worn by order of the leader while negotiating every dangerous rapid. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/topd0022 ID. Topography D 22 Grand Canyon National Park, Arizona. Mystery envelops the fate of the trappers who left this equipment. The cave in which these objects were found is below the high water mark, so that the lighter articles must have been swept away. It is surmised that the owners' boat was lost in the rough water immediately below, now christened "Cave Rapid". Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/topd0027 ID. Topography D 27 Grand Canyon National Park, Arizona.E.C. LaRue photographing Vaseys Paradise, 51.5 kilometers below Lees Ferry. This is one of the better known springs along the Colorado River and was named by Powell for Dr.G.W. Vasey, a botanist. Stanton Cave, where members of the Brown-Stanton expedition cached their equipment when they abandoned their first trip in 1889, lies only a few hundred meters upstream. Stanton Cave and the cave system from which springs flow at Vaseys Paradise are evidence of the susceptibility of Mississippian Redwall Limestone to solution. The moist area in the scene is generally northeast facing and supports a dense growth of redbud and poison ivy. A bare skirt just above the river marks the strip scoured periodically by heavy flow. Altitude is 875 meters. Photo by L.R. Freeman. Colorado River Survey of 1923 (Birdseye). Figure 41-A, U.S. Geological Survey Professional Paper 1132. #1:/Grand Canyon National Park/topd0030 ID. Topography D 30 Grand Canyon National Park, Arizona. Sandbar in Marble Canyon, site of a two day camp. Here the party spent August 10, the day set aside for the observance of the funeral of President Harding, news of whose death had been received by radio a few minutes after the tragic event occurred. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/topd0034 ID. Topography D 34 Grand Canyon National Park, Arizona. In the boat "Marble" in Kwagunt Rapid. The party encountered rougher water here than had any preceding expedition, due, in all probability, to an accession of boulders brought down the Kwagunt on the crest of some recent cloud burst. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/topd0036 ID. Topography D 36 Grand Canyon National Park, Arizona. Packing up for portage at the head of Hance Rapid. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/topd0037 ID. Topography D 37 Grand Canyon National Park, Arizona. Upper Granite Gorge, downstream toward Sockdologer Rapids, viewed from a cliff above Mineral Creek. Photo by L.R. Freeman. Colorado River Survey of 1923 (Birdseye). Page 3, Images of the U.S. Geological Survey, 1879-1979. #1:/Grand Canyon National Park/topd0038 ID. Topography D 38 Grand Canyon National Park, Arizona. At U.S. Geological Survey camp at Bright Angel: E.C. LaRue, Mrs. LaRue, Dudley, Frank Word (seated), Dr. Moore, Shurtleff (Fox News), Burchard. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/topd0045 ID. Topography D 45 Grand Canyon National Park, Arizona. The boat "Boulder" in Walthenburg Rapid. Although this rapid has a fall of 13 feet in a very short distance, making it one of the steepest of the Colorado River, it did not prove especially difficult to the expedition at the stage of water encountered by the party. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/topd0046 ID. Topography D 46 Grand Canyon National Park, Arizona. Handling the surveyor's rod at Walthenburg Rapid. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/topd0047 ID. Topography D 47 Grand Canyon National Park, Arizona. The boat "Marble" in Walthenburg Rapid, 2 miles above Tapeats Creek. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/topd0054 ID. Topography D 54 Grand Canyon National Park, Arizona.E.C. LaRue measures the flow of a side stream with a current meter. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/topd0055 ID. Topography D 55 Grand Canyon National Park, Arizona. Kanab Canyon at the 1,800-foot level. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/topd0074 ID. Topography D 74 Grand Canyon National Park, Arizona. Felix, the cook, and his assistants, H.C. Blake (left) and L. Lint (right) at Diamond Creek. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/topd0079 ID. Topography D 79 Grand Canyon National Park, Arizona. Glade at the head of Diamond Creek. Owing to the flood, the party was four days behind schedule in reaching this point, giving rise to the report that the expedition had met with disaster. Colorado River Survey of 1923 (Birdseye). #1:/Grand Canyon National Park/topd0084 ID. Topography D 84 Grand Canyon National Park, Arizona. The boat "Marble" in a rapid 9 miles below Diamond Creek. Note the two men clinging to the overdeck bow and stern, while the oarsman in the cockpit pilots the craft. Colorado River Survey of 1923 (Birdseye). #1:/Petrified Forest National Park/topo0252 ID. Topography A 252 Petrified Forest National Park, Arizona. Petrified log beneath a mass of rock. Photo by R.B. Marshall, 1910. #1:/Petrified Forest National Park/topo0254 ID. Topography A 254 Petrified Forest National Park, Arizona. Petrified log. Photo by R.B. Marshall, 1910. #1:/Hawaii Volcanoes National Park/tri00002 ID. Tilling, R.I. 2 Hawaii Volcanoes National Park. Kalapana earthquake of November 29, 1975. Lava fountains, about 10 meters high, on the floor of Kilauea Caldera at about 6:00 a.m. View is from near the west end of the eruptive fissure. November 29, 1975. Figure 13, U.S. Geological Survey Circular 740. #1:/Hawaii Volcanoes National Park/tri00010 ID. Tilling, R.I. 10 Hawaii Volcanoes National Park. Kalapana earthquake of November 29, 1975. Ground cracking and landslides in the back part of the overlook area at Puhimau Crater. The overlook area slumped completely into the crater, leaving the guardrail projecting into space. 1975. Figure 20-A, U.S. Geological Survey Circular 740. #1:/Hawaii Volcanoes National Park/tri00011 ID. Tilling, R.I. 11 Hawaii Volcanoes National Park. Kalapana earthquake of November 29, 1975. Large crack in Crater Rim Road. The cracking resulted from the slumping of the rim block toward the caldera, the edge of which is a few meters to the right of the road. 1975. Figure 21, U.S. Geological Survey Circular 740. #1:/Hawaii Volcanoes National Park/tri00012 ID. Tilling, R.I. 12 Hawaii Volcanoes National Park. Kalapana earthquake of November 29, 1975. Small compressional chevron fold across the road on the southeast side of Kilauea Military Camp. 1975. Figure 22, U.S. Geological Survey Circular 740. #1:/Hawaii Volcanoes National Park/tri00013 ID. Tilling, R.I. 13 Hawaii Volcanoes National Park. Kalapana earthquake of November 29, 1975. Collapse offsetting the center line of Chain of Craters Road just south of Pauahi Crater. 1975. Figure 23, U.S. Geological Survey Circular 740. #1:/Grand Canyon National Park/trm00018 ID. Turner, R.M. 18 Grand Canyon National Park, Arizona. Upstream view of the Colorado River taken from the Navajo Bridge on U.S. Highway 89, 6.9 kilometers below Lees Ferry. The bridge was completed in 1928, after which the ferry at Lees Ferry was abandoned. The vertical cliffs expose rocks of the Lower Permian and Toroweap Formation overlying Kaibab Limestone. The interrupted dense thicket is immediately above the infrequently flooded high water level and is composed of netleaf hackberry and Apache plume. Bare beaches of sand appear at this river stage. Altitude is 942 meters. Photo by R.S. Leding, U.S. National Park Service, October 21, 1952. Figure 35-A, U.S. Geological Survey Professional Paper 1132. See also photo trm00019. #1:/Grand Canyon National Park/trm00019 ID. Turner, R.M. 19 Grand Canyon National Park, Arizona. The Colorado River is at higher stage here than in the 1952 view (photo trm00018), and many of the former sandy areas are covered with water. The new dense riparian community is mainly saltcedar, sandbar willow, and Apache plume with infrequent stands of cattails. August 21, 1972. Figure 35-B, U.S. Geological Survey Professional Paper 1132. #1:/Grand Canyon National Park/trm00020 ID. Turner, R.M. 20 Grand Canyon National Park, Arizona. Colorado River overlooking Badger Creek rapids, viewed from a point above the left bank just north of Jackass Creek, 12.6 kilometers below Lees Ferry. Slopewash blankets the Hermit Shale Formation at river level here. The cliffs visible above consist of the Lower Permian Coconino Sandstone and overlying Toroweap Formation. At the time of this photograph, the discharge for the day at Lees Ferry was 2,799 cubic meters per second. Note the large shrub surrounded by water just off the right bank. This shrub persists in the 1972 photograph (photo trm00021). Altitude is 939 meters. June 19, 1952. Photo by R.S. Leding, U.S. National Park Service, June 19, 1952. Figure 36A, U.S. Geological Survey Professional Paper 1132. Several small dark spots on the right edge. #1:/Grand Canyon National Park/trm00021 ID. Turner, R.M. 21 Grand Canyon National Park, Arizona. The 24-hour discharge at Lees Ferry on the day of this photograph was 529.6 cubic meters per second, approximately one-fifth the volume for the date of photo trm00020. Note the raft passing the Badger Creek rapids and several other rafts near the right bank below the rapids. The water through the rapids is obviously more turbulent at this low stage than at the high stage in photo trm00020. The large shrub of the early view is visible and is saltcedar. This plant was present along the river at many places through the Grand Canyon as early as 1938, but it probably grew only at scattered localities at or slightly above the contour of maximum river stage. Saltcedar occurs as an interrupted band along both banks of the river. August 21, 1972. Figure 36-B, U.S. Geological Survey Professional Paper 1132. #1:/Grand Canyon National Park/trm00025 ID. Turner, R.M. 25 Grand Canyon National Park, Arizona. Saltcedar, growing to heights of 6 meters, is the dominant plant on the site. Longleaf brickellia (right foreground), wire lettuce, and spiny aster are also present. August 23, 1972. Figure 38-B, U.S. Geological Survey Professional Paper 1132. #1:/Grand Canyon National Park/trm00029 ID. Turner, R.M. 29 Grand Canyon National Park, Arizona. Colorado River. The tree on the right is saltcedar. The dominant small shrub on the fan is longleaf brickellia. Shrubs occur at scattered localities on the opposite side of the river. Since Powell's trip, there has developed in this short reach of the canyon an open terrestrial biotic community. Portion of a boat with passengers visible near the center. 1972. Figure 40-B, U.S. Geological Survey Professional Paper 1132. #1:/Grand Canyon National Park/trm00031 ID. Turner, R.M. 31 Grand Canyon National Park, Arizona. Many of the redbuds appear dead; however, since this photograph was taken many plants have been periodically observed to have progressively recovered. Many herbaceous plants now grow within the old scour zone, including scouring rush, watercress, and monkey flower. These plants were reported at Vaseys Paradise by Clover and Jotter in 1938. Saltcedar (right foreground ) is now established on the gravel bar near the camera station. March 17, 1974. Figure 41-B, U.S. Geological Survey Professional Paper 1132. #1:/Grand Canyon National Park/trm00033 ID. Turner, R.M. 33 Grand Canyon National Park, Arizona. The impact of wave action is not apparent away from the river, but wind ripples are evident in the sand of the foreground. Using the collapse blocks as references, it is apparent that aggradation, perhaps from the wind, has occurred on the higher parts of the beach, and erosion has reduced the sand deposit toward the base of the sloping beach. The sand bar across the river to the right appears new. The only plants visible are scattered saltcedars. The lack of more vegetation probably results from the low light intensity within the cavern and trampling by the thousands of visitors that stop here each year. 1974. Figure 42-A, U.S. Geological Survey Professional Paper 1132. #1:/Grand Canyon National Park/trm00035 ID. Turner, R.M. 35 Grand Canyon National Park, Arizona. Driftwood is visible. Much of the sand deposit is relatively unstable and devoid of plants. The floodline community, composed mainly of western honey mesquite in this section of Upper Marble Canyon, is leafless. Western honey mesquite is first seen in the canyon only 11.5 kilometers upriver from here. The vegetation at the river's edge is predominantly saltcedar and willow with sparse seep willow, arrowweed, and cattail. Other species found on the beach are peppergrass, desert plume, Russian thistle, red brome, globemallow, brittlebush, dyssodia, longleaf brickellia, and desert trumpet. March 1974. Figure 43-B, U.S. Geological Survey Professional Paper 1132. #1:/Grand Canyon National Park/trm00037 ID. Turner, R.M. 37 Grand Canyon National Park, Arizona. This photo was taken in March before many of the shrubs and trees in the valley were in full leaf. The decrease in density of the plants at A might be the result of differences in seasonal development. The dense thicket on the terrace above the boats (at B) was thinned by a wildfire that burned through the thicket in May 1970. There has been extensive development of the riparian belt near the margins of the river. Saltcedar, arrowweed, sandbar willow, and Emory seep willow are the dominant plants with occasional growths of cattail, smooth horsetail, and great bulrush. Trails have become prominent features of the slope leading to the Indian ruins. Ruins visible on the right. March 1974. Figure 44-B, U.S. Geological Survey Professional Paper 1132. #1:/Grand Canyon National Park/trm00039 ID. Turner, R.M. 39 Grand Canyon National Park, Arizona. Two boats representative of styles commonly in use today. Saltcedar now occupies the habitat nearest the river. The zone of dense vegetation above the old high water line is little changed in 100 years and is mainly catclaw. The river stage is several feet higher than at the time of Powell's visit. A silt deposit now covers formerly bare surfaces on the rocky promontory in the Lower and Middle Cambrian Tapetes Sandstone on the right. 1972. Figure 45-B, U.S. Geological Survey Professional Paper 1132. #1:/Grand Canyon National Park/trm00040 ID. Turner, R.M. 40 Grand Canyon National Park, Arizona. Mouth of the Little Colorado River, viewed from Cape Solitude, 1,167 meters above the river level. This upstream view of the Colorado River was taken after the completion of Glen Canyon Dam and during a period of low flow when Lake Powell was filling. From this vantage point, the interrupted line of dense vegetation marking the flood level is visible, especially on the left bank. A few shrubs (circle) have become established below the upper fringe of plants. The Little Colorado River enters from the right, and its waters appear turbid. A dense stand of riparian vegetation lines its left bank. Altitude is 826 meters. Photo courtesy of J. Blaisdell, U.S. National Park Service, July 13, 1963. Portion of Figure 46-A, U.S. Geological Survey Professional Paper 1132. See also photo trm00041. #1:/Grand Canyon National Park/trm00041 ID. Turner, R.M. 41 Grand Canyon National Park, Arizona. In the 10-year-period between this photo and photo trm00040, the dense stand of saltcedar remains approximately the same along the lowest reach of the Little Colorado River. Vegetation changes along the Colorado River mainstem show three trends, depending upon location: changes are slight or nonexistent within the dense stand of catclaw marking the former high water line; changes are conspicuous near the edge of the water where a dense growth of saltcedar has recently appeared; the few shrubs that had become established below the upper fringe by 1963 have increased in size but not in number. September 2, 1973. Figure 46-B, U.S. Geological Survey Professional Paper 1132. #1:/Grand Canyon National Park/trm00043 ID. Turner, R.M. 43 Grand Canyon National Park, Arizona. Near the mouth of Lava Canyon 105.4 kilometers below Lees Ferry. The foreground rocks show little change in 102 years. On the opposite shore, the bare sandy beach of the previous century is now covered by sandbar willow and saltcedar with minor inclusions of seep willow and arrowweed. The zone with western honey mesquite and catclaw is little changed and, although not discernible in this view, is separated from the riparian vegetation bordering the river by an open zone of mainly ephemeral plants. 1974. Figure 47-B, U.S. Geological Survey Professional Paper 1132. #1:/Grand Canyon National Park/trm00045 ID. Turner, R.M. 45 Grand Canyon National Park, Arizona. At the head of Hance Rapids, the depth of the sand deposit has increased and saltcedar grows densely along the edge of the river. The sand dune is new on the sloping area at left midground. The thicket of desert shrubs on the left, comprised of western honey mesquite, catclaw, and four-wing saltbush, is rearranged but may have changed little in biomass. The Hance Trail is no longer maintained and is not usable by pack animals. The remains of a campfire and the many human tracks attest to the heavy use the area receives as a campground by parties floating down the river. In 1974 this campsite was given a subjective human impact rating of 20.0 on a scale from 10.0 (no impact) to a maximum impact value of 22.6. In spite of the heavy use, saltcedar has become established in abundance. August 23, 1972. Portion of Figure 48-B, U.S. Geological Survey Professional Paper 1132. #1:/Grand Canyon National Park/trm00047 ID. Turner, R.M. 47 Grand Canyon National Park, Arizona. In this recent view of the head of Sockdolager Rapids, except for one clump of leafless saltcedar, little has changed in 102 years. Because of the narrow canyon and the near vertical walls, fluctuations in water level are exaggerated through this reach. The reaches of the river with the least vegetation change are the "Inner Gorges" represented by this view. March 1974. Figure 49-B, U.S. Geological Survey Professional Paper 1132. #1:/Grand Canyon National Park/trm00048 ID. Turner, R.M. 48 Grand Canyon National Park, Arizona. First in a set of three of Bright Angel Creek, viewed from Kaibab Trail just above the Kaibab Suspension Bridge, 140.6 kilometers below Lees Ferry. Photos trm00048, trm00049, and trm00050 span 20 years. The debris fan at the mouth of Bright Angel Canyon is devoid of plants except on higher ground where western honey mesquite is the dominant large plant. The large trees around the base of the hill near midground are Fremont cottonwoods. Phantom Ranch is out of view upstream on Bright Angel Creek. The area near the mouth of Bright Angel Creek is the most heavily visited location in the bottom of the Grand Canyon and is served by two trails from the south rim and one from the north. Altitude is 741 meters. Photo courtesy of R.S. Leding, U.S. National Park Service, 1952. Figure 50-A, U.S. Geological Survey Professional Paper 1132. #1:/Grand Canyon National Park/trm00049 ID. Turner, R.M. 49 Grand Canyon National Park, Arizona. Second in a set of three of Bright Angel Creek, viewed from Kaibab Trail just above the Kaibab Suspension Bridge, 140.6 kilometers below Lees Ferry. Photos trm00048, trm00049, and trm00050 span 20 years. Glen Canyon Dam had been completed, and the water was being impounded in the reservoir area above it. No plants occur at the river's edge. Most of the boulders on the beach are the same in this and the earlier photo. Photo courtesy of J. Blaisdell and A. Wolfe, U.S. National Park Service, 1963. Portion of Figure 50-B, U.S. Geological Survey Professional Paper 1132. #1:/Grand Canyon National Park/trm00050 ID. Turner, R.M. 50 Grand Canyon National Park, Arizona. Third in a set of three of Bright Angel Creek, viewed from Kaibab Trail just above the Kaibab Suspension Bridge, 140.6 kilometers below Lees Ferry. Photos trm00048, trm00049, and trm00050 span 20 years. In the nine years since the previous photo was taken many new features are apparent. In December 1966, record flooding occurred in the Bright Angel watershed. Bright Angel Creek left the old channel, flowing across the debris fan toward the camera point. Boulders in the path of the flood were removed from the fan (or covered?), and finer material was deposited in their place. In the absence of subsequent flooding along the Colorado River, this area has remained free of boulders. The bridge across the Colorado River on the left was built in 1967 and is used as a foot bridge. The bridge also supports a pipeline carrying water from the upper reaches of Bright Angel Creek to the south rim. The cottonwoods at midview have declined, as have the mesquites on the right (between the bare fan and the trail above). Plants now occupying the debris fan near the edge of the water include sandbar willow, saltcedar, and several Fremont cottonwood saplings. The fan was visited in May 1978. Beavers had cut the sapling cottonwoods, but the trees had produced multiple basal sprouts. August 23, 1972. Portion of Figure 50-C, U.S. Geological Survey Professional Paper 1132. #1:/Grand Canyon National Park/trm00054 ID. Turner, R.M. 54 Grand Canyon National Park, Arizona. The Colorado River is at higher stage than in 1901, but several changes are apparent: the sand deposit on the left is gone, and saltcedar now flanks the mouth of Shinumo Creek and also occupies the camera location. The pile of rounded boulders has changed little. 1972. Figure 52-B, U.S. Geological Survey Professional Paper 1132. #1:/Grand Canyon National Park/trm00060 ID. Turner, R.M. 60 Grand Canyon National Park, Arizona. Looking upstream at the head of the Middle Granite Gorge. The configuration of the pile of boulders has changed little, if at all, in 102 years. Dropseed, seep willow, and saltcedar have become established among the large rocks. The light-colored sand deposits appear smaller now than before. 1974. Figure 55-B, U.S. Geological Survey Professional Paper 1132. #1:/Grand Canyon National Park/trm00062 ID. Turner, R.M. 62 Grand Canyon National Park, Arizona. Few raft parties pass here without stopping. Between 1963, when Glen Canyon Dam was completed, and August 1972, an estimated 50,000 people had visited this site. Saltcedar, sandbar willow, and seep willow grow densely at the mouth of Deer Creek in spite of the heavy human impact. The large blocks and boulders have not changed noticeably since 1923, but changes involving some of the smaller rocks along the beach are evident. August 24, 1972. Figure 56-B, U.S. Geological Survey Professional Paper 1132. #1:/Grand Canyon National Park/trm00067 ID. Turner, R.M. 67 Grand Canyon National Park, Arizona. Lava Fall Rapids, viewed from the right bank looking toward the mouth of Prospect Canyon. Most boatman agree that Lava Falls Rapids, which lies 288.5 kilometers below Lees Ferry, represents the greatest hazard to navigation on the Colorado River. Flow in the river was approximately 1,473 cubic meters per second. The great turbulence created when the water encounters erosional debris from Prospect Canyon is clearly seen. The large dark shrubs (catclaw) were still present in 1976 (see photo trm00068). Some of the shrubs on the opposite bank are desert broom. Altitude is 511 meters. Photo by W. Belknap, Jr., U.S. National Park Service, June 19, 1950. Portion of Figure 59-A, U.S. Geological Survey Professional Paper 1132. #1:/Grand Canyon National Park/trm00068 ID. Turner, R.M. 68 Grand Canyon National Park, Arizona. Compared to photo trm00067, this photograph was taken from a slightly different position and at a time when the Colorado River was carrying only 102 cubic meters per second. There has been a notable biomass increase in the riparian community during the 26 years since the original photograph was taken. The erect, coarse grass at the mouth of Prospect Creek is carrizo. Other plants growing near the river include arrowweed, desert broom, cattail, saltcedar, and horseweed. On the dissected fan at the mouth of the canyon are creosote bush, catclaw, ocotillo, and barrel cactus. The last seems to have declined in number since 1950. September 26, 1976. Figure 59-B, U.S. Geological Survey Professional Paper 1132. #1:/Grand Canyon National Park/trm00072 ID. Turner, R.M. 72 Grand Canyon National Park, Arizona. The plants that densely occupy the higher ground of the old bar include saltcedar, seep willow, desert broom, catclaw, arrowweed, and some large western honey mesquites. The exposed bar is probably low enough to be inundated by the regular daily high flows. Because of the slightly darker tones of western honey mesquite and catclaw foliage compared to the color of the riparian plants, the contact between the old high-water community and the new riparian community is apparent. Across the river where the talus slopes have a northerly aspect, the high-water community is mostly western honey mesquite and catclaw. This elongate community appears slightly more open in August 1974 than in September 1923. The high-water community below the camera station has a southerly aspect, and four species share dominance: western honey mesquite, wolfberry, creosote bush, and catclaw. On the slope in the foreground is Mohave Desert scrub vegetation comprised of ocotillo, brittlebush, creosote bush, Morman tea, and barrel cactus. August 1974. Portion of Figure 61-B, U.S. Geological Survey Professional Paper 1132. #1:/Grand Canyon National Park/trm00080 ID. Turner, R.M. 80 Grand Canyon National Park, Arizona. Seasonal flow maxima are greatly reduced under the present flow regime, and formerly inhospitable debris fans now support a varied plant life. Among the species on the foreground alluvium are arrowweed, cattail, carrizon, desert broom, sandbar willow, and saltcedar. The conspicuous shrub below the sloping flat boulder at upper left is catclaw; the plant has changed little in nearly half a century. July 4, 1972. Figure 65-B, U.S. Geological Survey Professional Paper 1132. #1:/Grand Canyon National Park/trm00082 ID. Turner, R.M. 82 Grand Canyon National Park, Arizona. The camera station is now in a dense stand of arrowweed. Many saltcedar plants grow around the edge of the gravel bar where a half century earlier only one plant was visible. In addition, two western honey mesquites, desert broom, Goodding willow, and desert isocoma grow near the shore. The flood-line community, mainly of catclaw with a few western honey mesquites, is still present but seems diminished. Close inspection of this community shows that there are numerous burro trails, and the basal portions of flood-line community shrubs are stripped of foliage where in reach of animals. August 25, 1972. Figure 66-B, U.S. Geological Survey Professional Paper 1132. #1:/Grand Canyon National Park/trm00084 ID. Turner, R.M. 84 Grand Canyon National Park, Arizona. Saltcedars form a discontinuous strip along both shores. The depth of sand around the base of the boulders is less now than in 1923. The sand deposit is now partially stabilized by dropseed (the coarse grass), red brome, and Russian thistle. Signs of burro are abundant. September 29, 1976. Figure 67-B, U.S. Geological Survey Professional Paper 1132. #1:/Grand Canyon National Park/trm00086 ID. Turner, R.M. 86 Grand Canyon National Park, Arizona. Saltcedar, arrowweed, and seep willow grow thickly at the site occupied in 1902 by a single tree. Slightly to the right of that position can be seen a clump of cattails. August 25, 1972. Portion of Figure 68-B, U.S. Geological Survey Professional Paper 1132. #1:/Grand Canyon National Park/trm00088 ID. Turner, R.M. 88 Grand Canyon National Park, Arizona. A dense community of saltcedar, arrowweed, and seep willow has become established along the shore on both sides of the Colorado River. The fan on the right is more heavily overgrown by plants than in 1923, except for the formerly stabilized high terrace which now seems to be covered by a sand deposit. The Colorado River no longer floods the large bare area with boats and people on it. As a result, fine material, deposited by flooding on Diamond Creek, now covers the gravels that were present earlier. Bermuda grass grows in moist soil near the shelters. The lower reach of Diamond Creek (foreground) is lined by a riparian community dominated by saltcedar. September 29, 1976. Figure 69-B, U.S. Geological Survey Professional Paper 1132. #1:/Death Valley National Park/ttp00001 ID. Thayer, T.P. 1 Death Valley National Park, California. Ruins of Harmony Borax Mill. 1938. #1:/Death Valley National Park/ttp00019 ID. Thayer, T.P. 19 Death Valley National Park, California. West from Zabriskie Point across Gower Gulch and Death Valley to Telescope Peak. Furnace Creek beds in the foreground; volcanics of the Artist Drive Formation in the high ridges. 1938. #1:/Death Valley National Park/ttp00020 ID. Thayer, T.P. 20 Death Valley National Park, California. Colemanite beds and basalt flow in playa clays of the Furnace Creek Formation southwest of Zabriskie Point. 1938. #1:/Death Valley National Park/ttp00022 ID. Thayer, T.P. 22 Death Valley National Park, California. Casts of birds' footprints in an overhanging sandstone ledge northeast of Park Village. 1938. #1:/Death Valley National Park/ttp00023 ID. Thayer, T.P. 23 Death Valley National Park, California. Footprints of four-toed birds, pencil points at the end of the fourth toe, in Furnace Creek Sandstone. 1938. #1:/Death Valley National Park/ttp00024 ID. Thayer, T.P. 24 Death Valley National Park, California. Cast of a bird's footprint in an overhanging ledge northeast of Park Village. 1938. #1:/Death Valley National Park/ttp00025 ID. Thayer, T.P. 25 Death Valley National Park, California. Casts of bird tracks in Furnace Creek Sandstone north of Cow Creek Wash. 1938. #1:/Death Valley National Park/ttp00026 ID. Thayer, T.P. 26 Death Valley National Park, California. Bird track in Furnace Creek mudstone in Copper Canyon. 1938. #1:/Death Valley National Park/ttp00027 ID. Thayer, T.P. 27 Death Valley National Park, California. Fore-limb bones of a Pleistocene(?) camel found in an adobe pit at Park Village. 1938. #1:/Death Valley National Park/ttp00030 ID. Thayer, T.P. 30 Death Valley National Park, California. Sandstones of the Furnace Creek Formation near the bird track locality northeast of Park Village. 1938. #1:/Death Valley National Park/ttp00031 ID. Thayer, T.P. 31 Death Valley National Park, California. Wash in indurated fanglomerate of the Furnace Creek Formation northeast of Furnace Creek. 1938. #1:/Death Valley National Park/ttp00032 ID. Thayer, T.P. 32 Death Valley National Park, California. Undercutting of resistant fanglomerate on the outside of stream meander in the Furnace Creek Formation. 1938. #1:/Death Valley National Park/ttp00033 ID. Thayer, T.P. 33 Death Valley National Park, California. Vertical slot cut in sandstones of the Furnace Creek Formation northeast of Furnace Creek. 1938. #1:/Death Valley National Park/ttp00034 ID. Thayer, T.P. 34 Death Valley National Park, California. Overturned beds of the Furnace Creek Formation dipping 70 degrees east at the upper end of the slot shown in photo ttp0033. 1938. #1:/Death Valley National Park/ttp00035 ID. Thayer, T.P. 35 Death Valley National Park, California. Interbedded fanglomerates and sandstone in the Furnace Creek Formation at the south end of Cow Creek Hills. 1938. #1:/Death Valley National Park/ttp00039 ID. Thayer, T.P. 39 Death Valley National Park, California. Clay and fanglomerates of the Furnace Creek Formation in Stovepipe Hills. 1938. Photos ttp00039 and ttp00040 form a panorama. #1:/Death Valley National Park/ttp00040 ID. Thayer, T.P. 40 Death Valley National Park, California. Clay and fanglomerates of the Furnace Creek Formation in Stovepipe Hills. 1938. Photos ttp00039 and ttp00040 form a panorama. #1:/Death Valley National Park/ttp00041 ID. Thayer, T.P. 41 Death Valley National Park, California. Cliffs formed by rainwash on basaltic fanglomerate in the Furnace Creek Formation 1 mile south of Furnace Creek Inn. 1938. #1:/Death Valley National Park/ttp00042 ID. Thayer, T.P. 42 Death Valley National Park, California. Upper portion of Furnace Creek Wash and the southern end of the Funeral Mountains, viewed from the Black Mountains. 1938. Photos ttp00042 and ttp00043 form a panorama. #1:/Death Valley National Park/ttp00043 ID. Thayer, T.P. 43 Death Valley National Park, California. Upper portion of Furnace Creek Wash and the southern end of the Funeral Mountains, viewed from the Black Mountains. 1938. Photos ttp00042 and ttp00043 form a panorama. #1:/Death Valley National Park/ttp00044 ID. Thayer, T.P. 44 Death Valley National Park, California. Disturbances of clays in Manly overthrust zone about 1 mile south of Furnace Creek Inn. Car stands below an 8-foot fault scarp in the alluvium. 1938. #1:/Death Valley National Park/ttp00045 ID. Thayer, T.P. 45 Death Valley National Park, California. Faulting in the Artist Drive Formation in the crest of the Black Mountains. View is southeast. Photos ttp00045 and ttp00046 form a panorama. 1938. #1:/Death Valley National Park/ttp00046 ID. Thayer, T.P. 46 Death Valley National Park, California. Faulting in the Artist Drive Formation in the crest of the Black Mountains. View is southeast. Photos ttp00045 and ttp00046 form a panorama. 1938. #1:/Death Valley National Park/ttp00048 ID. Thayer, T.P. 48 Death Valley National Park, California. Gower Gulch at the north end of the Black Mountains. Borate-bearing fanglomerate partly sheared across steeply tilted borate beds. Basalt flow in playa clays in the distance. Mine portal at left of center. 1938. #1:/Death Valley National Park/ttp00049 ID. Thayer, T.P. 49 Death Valley National Park, California. Veins of borate minerals following small faults in bedded basalt debris. Prospect tunnels in borate-bearing fanglomerate shown in photo ttp00048. View is south along strike from that photograph. 1938. #1:/Death Valley National Park/ttp00050 ID. Thayer, T.P. 50 Death Valley National Park, California. Basalt flows and dikes in Furnace Creek Clays cut off by the fault crossing from lower right to center left and, in turn, cut off by the overthrust fault following the base of the ridge capped by colemanite, north of 20 Mule Team Canyon. 1938. #1:/Death Valley National Park/ttp00051 ID. Thayer, T.P. 51 Death Valley National Park, California. View is southwest along the fault in photo ttp00050. Playa deposits on the right are dropped against underlying volcanic flows to the left. 1938. #1:/Death Valley National Park/ttp00053 ID. Thayer, T.P. 53 Death Valley National Park, California. Platy olivine basalt flows in playa clays of Furnace Creek in the Salt Creek Hills near Stovepipe Wells. 1938. #1:/Death Valley National Park/ttp00054 ID. Thayer, T.P. 54 Death Valley National Park, California. Platy olivine basalt flows in playa clays of Furnace Creek in the Salt Creek Hills near Stovepipe Wells. 1938. #1:/Death Valley National Park/ttp00055 ID. Thayer, T.P. 55 Death Valley National Park, California. Travertine deposited by springs issuing from the contact of fanglomerate and clay in the wash east of the Civilian Conservation Corps (CCC) camp. 1938. #1:/Death Valley National Park/ttp00056 ID. Thayer, T.P. 56 Death Valley National Park, California. Travertine deposited by springs issuing from the contact of fanglomerate and clay in the wash east of the Civilian Conservation Corps (CCC) camp. 1938. #1:/Death Valley National Park/ttp00057 ID. Thayer, T.P. 57 Death Valley National Park, California. Funeral Fanglomerate faulted against clays of the Furnace Creek Formation (left) on Stovepipe Fault west of Nevares Peak. 1938. #1:/Death Valley National Park/ttp00059 ID. Thayer, T.P. 59 Death Valley National Park, California. Funeral Fanglomerate faulted against borate clays of the Furnace Creek Formation 2 miles south of Zabriskie Point. 1938. #1:/Death Valley National Park/ttp00061 ID. Thayer, T.P. 61 Death Valley Nation Park, California. Travertine vein in Funeral Fanglomerate northeast of Furnace Creek Wash. 1938. #1:/Death Valley National Park/ttp00063 ID. Thayer, T.P. 63 Death Valley National Park, California. Rounded pebbles in travertine matrix, a possible beach deposit. Talus block from low klippe in Furnace Creek Wash. 1938. #1:/Death Valley National Park/ttp00065 ID. Thayer, T.P. 65 Death Valley National Park, California. Thin-bedded Pleistocene sediments lying on tilted sediments of Funeral Fanglomerate(?) in the Salt Creek Hills. 1938. #1:/Death Valley National Park/ttp00066 ID. Thayer, T.P. 66 Death Valley National Park, California. Olivine gabbro boulders weathered from fanglomerate in the Salt Creek Hills to the east of the Panamint Mountains. 1938. #1:/Death Valley National Park/ttp00067 ID. Thayer, T.P. 67 Death Valley National Park, California. Brecciated Ordovician(?) quartzite in basaltic fanglomerate at the north end of Artist Drive Hills near Mushroom Rock. 1938. #1:/Death Valley National Park/ttp00068 ID. Thayer, T.P. 68 Death Valley National Park, California. Erosion of clays of Funeral Fanglomerate, 2 or 3 miles north of Park Village. 1938. #1:/Thayer T.P. Collection/ttp00190 ID. Thayer, T.P. 190 Uplifted pediment and segment of valley sediments at west base of Panamint Mountains, near Ballarat. Relief about 8,000 feet. Inyo County, California. 1938. #1:/Tweto O. Collection-Boss Mine/twe00171 ID. Tweto, O. 171 Boss mine dumps; view looking north. Gore Range-Eagles Nest Primitive Area. Summit County, Colorado. 1969. Figure 21 in U.S. Geological Survey. Bulletin 1319-C. 1970. #1:/Thurston W.R. Collection-Spor Mine/twr00001 ID. Thurston, W.R. 1 View eastward across workings, Fluorspar pipe at Floride (original Spor) mine. Juab County, Utah. May 1945. Plate 7-A in U.S. Geological Survey. Bulletin 1005. 1954. #1:/Gaggiani N. Collection-Argo Mine Tunnel/usg00091 ID. U.S. Geological Survey 91ct Contaminated water at the Argo (mine) Tunnel, Idaho Springs. Photo by N. Gaggiani. Clear Creek County, Colorado. 1983. #1:/Lowry Landfill, Colorado/usg00096 ID. U.S. Geological Survey 96ct Lowry Landfill, Colorado. Hazardous waste and garbage mixture. Photo by N. Gaggiani, 1978. #1:/Lowry Landfill, Colorado/usg00106 ID. U.S. Geological Survey 106ct Lowry Landfill, Colorado. Sludge runoff. Photo by N. Gaggiani, circa 1978. #1:/Glacier Bay National Park and Preserve/usg00154 ID. U.S. Geological Survey 154ct Glacier Bay National Park and Preserve. Brady Glacier in the Fairweather Range. Photo by M.E. Dalechek, 1976. #1:/Alaska Glaciers/usg00157 ID. U.S. Geological Survey 157ct Alaska Glaciers. Blue ice at the terminus of Worthington Glacier, which is northeast of Valdez in the Chugach Mountains, showing calving. Photo by M.E. Dalechek,1979. #1:/Coastal Regions/usg00275 ID. U.S. Geological Survey 275ct Coastal Regions. Interface between sediment-laden Mississippi water and Gulf of Mexico water. #1:/Hebgen Lake, Montana, Earthquake August 1959/van00133 ID. Van Horn, R. 133ct Hebgen Lake, Montana, Earthquake August 1959. Large Madison dolomite boulder in the toe area on the east side of the Madison River slide. Earthquake Lake in the background. September 16, 1959. #1:/Mount Rainier National Park/vfm00002 ID. Veatch, F.M. 2 Mount Rainier National Park, Washington. Nisqually Glacier from its confluence with Wilson Glacier to the nunatak, as seen from station 7 in August 1915 by G.L. Parker, U.S. Geological Survey. This view was taken from a slightly different location than the others in series 7; it was higher on the hillside, with the camera pointed farther to k left. Note (as is graphically verified in photo vfm00009) how the conformation of the surface slope of the ice along the west canyon was different in 1915 than in 1963 or 1965 and how, during the intervening half century, many changes in exposure of the rock formations occurred. Note also the two moraines near the far edge of the glacier, marked by debris lines. August 1945. Figure 3 in U.S. Geological Survey Professional Paper 631. #1:/Veatch F.M. Collection-Mount Rainier National Park/vfm00003 ID. Veatch, F.M. 3 Nisqually Glacier, from confluence with Wilson Glacier to the nunatak, as seen from station 7 on August 22, 1945. Upper part of glacier is at about its lowest known ice mass, as evidenced by the exposure of bedrock. There is almost no crevassing in middle reach. Slope at center of photo is very flat and broken below there. Note the lightcolored medial moraine approaching nunatak from upper right. Sources of debris may be deduced. Note also large icecored moraine along wrest edge of glacier. Mount Rainier National Park. Pierce County, Washington. August 22, 1945. Photo nos. 3 and 4 form a panorama assigned no. 5, published as figure 4 in U.S. Geological Survey. Professional paper 631. 1969. #1:/Veatch F.M. Collection-Mount Rainier National Park/vfm00004 ID. Veatch, F.M. 4 Nisqually Glacier, from confluence with Wilson Glacier to the nunatak, as seen from station 7 on August 22, 1945. Upper part of glacier is at about its lowest known ice mass, as evidenced by the exposure of bedrock. There is almost no crevassing in middle reach. Slope at center of photo is very flat and broken below there. Note the lightcolored medial moraine approaching nunatak from upper right. Sources of debris may be deduced. Note also large ice-cored moraine along wrest edge of glacier. Mount Rainier National Park. Pierce County, Washington. August 22, 1945. Photo nos. 3 and 4 form a panorama assigned no. 5, published as figure 4 in U.S. Geological Survey. Professional paper 631. 1969. #1:/Mount Rainier National Park/vfm00005 ID. Veatch, F.M. 5 Mount Rainier National Park, Washington. Nisqually Glacier from its confluence with Wilson Glacier to the nunatak, as seen from station 7. The upper part of glacier is at about its lowest known ice mass, as evidenced by the exposure of bedrock. There is almost no crevassing in the middle reach. The slope in the center is very flat and broken below there. Note the light-colored medial moraine approaching the nunatak from the upper right. Sources of debris may be deduced. Note also the large ice-cored moraine along the west edge of the glacier. August 22, 1945. Figure 4, U.S. Geological Survey Professional Paper 631. #1:/Mount Rainier National Park/vfm00008 ID. Veatch, F.M. 8 Mount Rainier National Park, Washington. Nisqually Glacier from its confluence with Wilson Glacier to the nunatak, as seen from station 7. The transverse crevasses developing in the east part of the glacier above the nunatak indicate the direct down-valley movement of that ice. The ice-cored moraine seen in photo vfm00005 is now subdued because of the rejuvenating movement. Since 1945, the glacier has recovered much of the volume evident in 1894. August 27, 1963. Figure 5, U.S. Geological Survey Professional Paper 631. #1:/Mount Rainier National Park/vfm00009 ID. Veatch, F.M. 9 Mount Rainier National Park, Washington. Nisqually Glacier ice margins for selected years in the period 1890-1963. By 1965, the glacier had recovered much of the ice thickness it had lost since 1890. August 23, 1951. Figure 6, U.S. Geological Survey Professional Paper 631. #1:/Mount Rainier National Park/vfm00010 ID. Veatch, F.M. 10 Mount Rainier National Park, Washington. Nisqaully Glacier ice margins around the nunatak for selected years in the period 1942-65. The down-glacier part of the 1942, 1961, and 1965 lines are indeterminate because the ice is obscured by debris. August 22, 1951. Figure 13, U.S. Geological Survey Professional Paper 631. #1:/Mount Rainier National Park/vfm00011 ID. Veatch, F.M. 11 Mount Rainier National Park, Washington. View across Nisqually Glacier in series 14-W (profile 2) used to determine slope and changes in ice thickness. Not indicated is the bedrock feature from which the changes in ice-surface elevation were measured. The apparent crest of the debris-covered ice, rather than the white ice, was averaged to compute slope and charges in thickness in this and all other views in this series. The hand-held camera has been tilted, due to the deceptiveness of the true slope of the glacier. August 21, 1942. Figure 7, U.S. Geological Survey Professional Paper 631. #1:/Mount Rainier National Park/vfm00012 ID. Veatch, F.M. 12 Mount Rainier National Park, Washington. View across Nisqually Glacier in series 14-W (profile 2) used to determine slope and changes in ice thickness. Note the relief visible in the canyon wall, which is not at all apparent in the views that were taken in 1942, 1960, and 1965 under flatter lighting. August 27, 1952. Figure 8, U.S. Geological Survey Professional Paper 631. See also photo vfrm00013. #1:/Mount Rainier National Park/vfm00013 ID. Veatch, F.M. 13 Mount Rainier National Park, Washington. View across Nisqually Glacier in series 14-W (profile 2) used to determine slope and changes in ice thickness. The glacier surface in this area has become much rougher since 1952 (photo vfm00012), and the streak of white (clear) ice is now hidden behind the thickened zone of crevassed, debris-covered ice. September 8, 1960. Figure 9, U.S. Geological Survey Professional Paper 631. #1:/Mount Rainier National Park/vfm00015 ID. Veatch, F.M. 15 Mount Rainier National Park, Washington. Changes in ice thickness of Nisqually Glacier occurring about 4,000 feet (1,200 meters) up-glacier from profile 3 were measured on the photographs in series 15. The upper end of the measurement is the base of a lava flow, and the lower end is the top of the ice. This 1944 view illustrates the general nature of the upper area after many years of recession, just preceding the ice advance of the late 1940's. The ice discharge from Wilson Glacier is lost, and large areas of bedrock near its mouth are exposed. The falls on the far left are relatively large compared with their condition in later years (1957-65). Note the opposite direction of cleavage in crevassing patterns visible in midglacier on the lower left. It is evident that the debris load comes from sources along both sides of Nisqually Glacier and from Wilson Glacier. Bedrock areas shown in the foreground were inundated by ice as the glacier thickened and expanded. Compare with photo vfm00043 which shows this area in 1965. September 3, 1944. Figure 12, U.S. Geological Survey Professional Paper 631. Photos vfm00015 and vfm00016 form a panorama. #1:/Mount Rainier National Park/vfm00016 ID. Veatch, F.M. 16 Mount Rainier National Park, Washington. Changes in ice thickness of Nisqually Glacier occurring about 4,000 feet (1,200 meters) up-glacier from profile 3 were measured on the photographs in series 15. The upper end of the measurement is the base of a lava flow, and the lower end is the top of the ice. This 1944 view illustrates the general nature of the upper area after many years of recession, just preceding the ice advance of the late 1940's. The ice discharge from Wilson Glacier is lost, and large areas of bedrock near its mouth are exposed. The falls on the far left are relatively large compared with their condition in later years (1957-65). Note the opposite direction of cleavage in crevassing patterns visible in midglacier on the lower left. It is evident that the debris load comes from sources along both sides of Nisqually Glacier and from Wilson Glacier. Bedrock areas shown in the foreground were inundated by ice as the glacier thickened and expanded. Compare with photo vfm00043 which shows this area in 1965. September 3, 1944. Figure 12, U.S. Geological Survey Professional Paper 631. Photos vfm00015 and vfm00016 form a panorama. #1:/Mount Rainier National Park/vfm00017 ID. Veatch, F.M. 17 Mount Rainier National Park, Washington. Several areas of firn on Nisqually Glacier,as seen from station 13. Note patchy, broken configuration of the firn edge. September 3, 1955. Figure 15, U.S. Geological Survey Professional Paper 631. #1:/Mount Rainier National Park/vfm00019 ID. Veatch, F.M. 19 Mount Rainier National Park, Washington. Terminus of Nisqually Glacier selected from series 1-NE, taken from a point at or near the old highway bridge. Note the bulging shape of the terminus, steepness of the downstream face, and the vertical crevassing pattern. These characteristics suggest that the terminus is, or has very recently been, advancing. Photo by E. Ricksecker, U.S. National Park Service, 1903. Figure 16, U.S. Geological Survey Professional Paper 631. #1:/Mount Rainier National Park/vfm00021 ID. Veatch, F.M. 21 Mount Rainier National Park, Washington. Terminus of Nisqually Glacier selected from series 1-NE, taken from a point at or near the old highway bridge. In marked contrast to the 1903 (photo vfm00019) and 1908 appearances, the non-crevassed, "sliced-off"-looking terminal face and the generally concave, debris-covered condition of the surface above indicate that the terminus is now definitely receding and is approaching a stagnant condition. July 5, 1929. Figure 18, U.S. Geological Survey Professional Paper 631. #1:/Mount Rainier National Park/vfm00022 ID. Veatch, F.M. 22 Mount Rainier National Park, Washington. Lower part of Nisqually Glacier as seen from station 5. Approximate locations of the surveyed cross profiles are shown. The entire glacier is receding. The area down-glacier (lower end of the white ice) is stagnant, as indicated by hummocky, debris-covered, non- crevassed ice. Note the long moraine-like ridge of debris-covered ice immediately to left of the white ice. The nunatak is bare. Note the debris load on the right half of the glacier downstream. August 31, 1942. Figure 20, U.S. Geological Survey Professional Paper 631. See also photo vfm00024. #1:/Mount Rainier National Park/vfm00023 ID. Veatch, F.M. 23 Mount Rainier National Park, Washington. Terminus of Nisqually Glacier selected from series 1-NE, taken from a point at or near the old highway bridge. The terminus is now more irregular and segmented than in 1929. This suggests stagnation, as there is little evidence of ice flow to the terminus from above. The rate of melting is probably reduced because of the extensive debris cover. August 19, 1942. Figure 19, U.S. Geological Survey Professional Paper 631. #1:/Mount Rainier National Park/vfm00024 ID. Veatch, F.M. 24 Mount Rainier National Park, Washington. Lower part of Nisqually Glacier as seen from station 5. Since 1942, the glacier has thickened by about 80 feet (24 meters) in the upper center and 40 feet (12 meters) slightly lower, but it is still thinning in the center of the photograph. Note the lateral melting of the ice ridge to left of the nunatak, as compared with the 1942 view (photo vfm00022), and the exposed river bed. August 22, 1951. Figure 21, U.S. Geological Survey Professional Paper 631. #1:/Mount Rainier National Park/vfm00025 ID. Veatch, F.M. 25 Mount Rainier National Park, Washington. Lower part of Nisqually Glacier as seen from station 5. This is the year of minimum ice mass at the lower portion of the glacier, where, according to surveys, the glacier surface has dropped 13 feet (4 meters) since 1951. Toward the top of the photo, it has dropped 21 feet (6 meters), but toward the center of the glacier, the ice mass is now 42 feet (13 meters) thicker than in 1951. Note the steep front of the vigorous advance of fresh ice which is passing to the left of the nunatak. Downstream from there, the ice is dead and melting away slowly owing to its insulation by a thick mantle of debris. Surveys show that 1954 is the first year when a segment of the ice surface near the west end began to rise. September 1, 1954. Figure 22, U.S. Geological Survey Professional Paper 631. #1:/Mount Rainier National Park/vfm00026 ID. Veatch, F.M. 26 Mount Rainier National Park, Washington. Lower part of Nisqually Glacier as seen from station 5. With respect to its 1954 condition (photo vfm00025), the glacier now is 9 feet (3 meters) thinner at its upper portion, 12 feet (4 meters) thicker lower down in the glacier, and 70 feet (21 meters) thicker at the lower portion of glacier. The stagnant ice terminus now is visible at the lower left. Fresh, white ice has nearly obscured the debris-covered ice ridge opposite the nunatak near the left (west) edge of the glacier. September 11, 1959. Figure 23, U.S. Geological Survey Professional Paper 633. #1:/Mount Rainier National Park/vfm00027 ID. Veatch, F.M. 27 Mount Rainier National Park, Washington. Lower part of Nisqually Glacier as seen from station 5 . The upper portion of the glacier is 7 feet (2 meters) higher than in 1959 (photo vfm00026), and since then the glacier has thickened 22 feet (7 meters) lower down and 24 feet (7 meters) toward the bottom of the glacier. The broad bulge of thickening is visible in midglacier in its center portion. The nunatak has been topped by flowing ice. Dead ice downstream has receded considerably since 1959, but now previously stagnant ice in midchannel is thickened and has been incorporated into the advancing terminus. September 8, 1962. Figure 24, U.S. Geological Survey Professional Paper 631. #1:/Mount Rainier National Park/vfm00028 ID. Veatch, F.M. 28 Mount Rainier National Park, Washington. Lower part of Nisqually Glacier as seen from station 5. With respect to its 1962 condition (photo vfm00027), the glacier has gained 3 feet (1 meter) in thickness in the upper area and lost 5 feet (2 meters) lower down. However, toward the bottom, the thickness has increased 34 feet (10 meters). The preliminary result now available for the 1966 survey shows that 1965 was a peak year at the bottom of the glacier. The vigorous terminal reach and snout of the glacier have completely covered or incorporated all vestiges of stagnant ice. The nunatak is almost entirely engulfed. August 30, 1965. Figure 25, U.S. Geological Survey Professional Paper 631. #1:/Mount Rainier National Park/vfm00029 ID. Veatch, F.M. 29 Mount Rainier National Park, Washington. Patterns of small recessional lateral moraines on the east bank of Nisqually Glacier at an altitude of about 6,400 feet (1,950 meters) are evident, looking up-glacier from station 12. The patterns suggest that, at times, the recession progressed in a discontinuous manner, as in successive small steps interrupted by slight advances. Photo by F.F. Lawrence, August 26, 1940. Figure 26, U.S. Geological Survey Professional Paper 631. #1:/Mount Rainier National Park/vfm00031 ID. Veatch, F.M. 31 Mount Rainier National Park, Washington. Nisqually Glacier near the nunatak, as seen from station 6. Practically all the main ice flow from the east half of the glacier is being diverted to the west side of the nunatak. Note the steep front of the fresh ice advance. September 1, 1954. Figure 28, U.S. Geological Survey Professional Paper 631. #1:/Mount Rainier National Park/vfm00032 ID. Veatch, F.M. 32 Mount Rainier National Park, Washington. Nisqually Glacier near the nunatak, as seen from station 6. Note the growth and movement of ice over the peak of the nunatak and along its east side which have occurred since 1954 (photo vfm00031). Crevassing in midglacier in the vicinity of the nunatak has a very coarse pattern, and the ablation of crevassed walls is very evident This was a summer of abnormally high ablation. The ice-cored, moraine-like ridge noted on the left in the 1942 view in series 5 (photo vfm00023) has nearly disappeared. September 5, 1958. Figure 29, U.S. Geological Survey Professional Paper 631. #1:/Mount Rainier National Park/vfm00033 ID. Veatch, F.M. 33 Mount Rainier National Park, Washington. Nisqually Glacier near the nunatak, as seen from station 6. Note the finer pattern of the crevassing in comparison with 1958 and the large patch of debris on the ice at the lower left. The slope at profile 2 appears reduced. This is the fourth consecutive year, beginning with 1958 (photo vfm00032), in which surveys show that the elevation and slope of the glacier surface has remained nearly constant. September 6, 1961. Figure 30, U.S. Geological Survey Professional Paper 631. #1:/Mount Rainier National Park/vfm00034 ID. Veatch, F.M. 34 Mount Rainier National Park, Washington. Nisqually Glacier near the nunatak, as seen from station 6. This year, crevassing patterns are generally coarser than in 1961 (photo vfm00033). This wave of ice advance which is engulfing much of the nunatak reached a peak at profile 2 in 1963 and at profile 1 in 1965. A substantial part of the east-half discharge is now continuing straight down the glacier parallel to the valley margins, in contrast to the 1952-54 conditions of nearly complete diversion to the west. The large patch of debris visible in 1961 has gone, but debris still is surfacing just to the left of the nunatak. The debris mantle is continuous again in reach along the west canyon wall where an ice ridge formerly existed. August 30, 1965. Figure 31, U.S. Geological Survey Professional Paper 631. #1:/Veatch F.M. Collection-Mount Rainier National Park/vfm00035 ID. Veatch, F.M. 35 Upper reaches of Nisqually and Wilson Glaciers as seen from station 13 on August 28, 1949, taken several hundred feet up glacier from station 13. Along the center of the photo, the surface of the ice is 62 feet (19 m) higher than in 1944 (photo no. 18); 19 feet (6 m) of this was added since 1948. Crevassing is becoming more extensive. Bedrock outcrops at the mouth of Wilson Glacier are nearly covered. Many of the bedrock outcrops noted in photo no. 18 are already covered by the expanding glacier. Mount Rainier National Park. Pierce County, Washington. August 28, 1949. Photo nos. 35 and 36 form, a panorama assigned no. 37, published as figure 32 in U.S. Geological Survey. Professional paper 631. 1969. #1:/Veatch F.M. Collection-Mount Rainier National Park/vfm00036 ID. Veatch, F.M. 36 Upper reaches of Nisqually and Wilson Glaciers as seen from station 13 on August 28, 1949, taken several hundred feet up glacier from station 13. Along the center of the photo, the surface of the ice is 62 feet (19 m) higher than in 1944 (photo no. 18); 19 feet (6 m) of this was added since 1948. Crevassing is becoming more extensive. Bedrock outcrops at the mouth of Wilson Glacier are nearly covered. Many of the bedrock outcrops noted in photo no. 18 are already covered by the expanding glacier. Mount Rainier National Park. Pierce County, Washington. August 28, 1949. Photo nos. 35 and 36 form, a panorama assigned no. 37, published as figure 32 in U.S. Geological Survey. Professional paper 631. 1969. #1:/Mount Rainier National Park/vfm00037 ID. Veatch, F.M. 37 Mount Rainier National Park, Washington. Upper reaches of the Nisqually and Wilson Glaciers, as seen from station 13. View is from several hundred feet up-glacier from station 13. Along the center, the surface of the ice is 62 feet (19 meters) higher than in 1944; 19 feet (6 meters) of this was added since 1948. Crevassing is becoming more extensive. Bedrock outcrops at the mouth of Wilson Glacier are nearly covered. Many of the bedrock outcrops are covered by the expanding glacier. August 28, 1949. Figure 32, U.S. Geological Survey Professional Paper 631. #1:/Veatch F.M. Collection-Mount Rainier National Park/vfm00038 ID. Veatch, F.M. 38 Upper reaches of Nisaqually and Wilson Glaciers as seen from station 13 on August 30, 1957. Most of exposed bedrock areas marked in photo no. 18 are now covered by Wilson Glacier. Glacier surface at profile 3 is only 3 feet (1 m) higher than in 1949, but near left edge of picture it probably is about 60 feet (18 m) higher because at profile 2 the ice level rose 97 feet (30 m) from 1949 to 1957. The crevassing appears much coarser (rougher) now and extends to the east edge of the glacier. Exposed face of the ice field above the cliff is thicker. The falls at far left are nearly dry (compare with photo no. 18). Note the different layers (ages) of firn exposed in the small area at lower right, which can be differentiated by various shades of gray. Mount Rainier National Park. Pierce County, Washington. August 30, 1957. Photo nos. 38 and 39 form a panorama assigned no. 40, published as figure 33 in U.S. Geological Survey. Professional paper 631. 1969. #1:/Veatch F.M. Collection-Mount Rainier National Park/vfm00039 ID. Veatch, F.M. 39 Upper reaches of Nisaqually and Wilson Glaciers as seen from station 13 on August 30, 1957. Most of exposed bedrock areas marked in photo no. 18 are now covered by Wilson Glacier. Glacier surface at profile 3 is only 3 feet (1 m) higher than in 1949, but near left edge of picture it probably is about 60 feet (18 m) higher because at profile 2 the ice level rose 97 feet (30 m) from 1949 to 1957. The crevassing appears much coarser (rougher) now and extends to the east edge of the glacier. Exposed face of the ice field above the cliff is thicker. The falls at far left are nearly dry (compare with photo no. 18). Note the different layers (ages) of firn exposed in the small area at lower right, which can be differentiated by various shades of gray. Mount Rainier National Park. Pierce County, Washington. August 30, 1957. Photo nos. 38 and 39 form a panorama assigned no. 40, published as figure 33 in U.S. Geological Survey. Professional paper 631. 1969. #1:/Mount Rainier National Park/vfm00040 ID. Veatch, F.M. 40 Mount Rainier National Park, Washington. Upper reaches of the Nisqually and Wilson Glaciers, as seen from station 13. Most of the exposed bedrock areas are covered by Wilson Glacier. The glacier surface at profile 3 is only 3 feet (1 meter) higher than in 1949 (photo vfm00037), but near the left edge it probably is about 60 feet (18 meters) higher, because at profile 2 the ice level rose 97 feet (34 meters) from 1949 to 1957. The crevassing appears much coarser (rougher) now and extends to the east edge of the glacier. The exposed face of the ice field above the cliff is thicker. The falls at the far left are nearly dry. Note the different layers (ages) of firn exposed in the small area on the lower right, which can be differentiated by various shades of gray. August 30, 1957. Figure 33, U.S. Geological Survey Professional Paper 631. #1:/Mount Rainier National Park/vfm00043 ID. Veatch, F.M. 43 Mount Rainier National Park, Washington. Upper reaches of the Nisqually and Wilson Glaciers, as seen from station 13. The glacier from profile 3 downstream to where it leaves this view has now reached a steady state condition, as determined by the annual surveys. In general, the crevassing appears similar to that of 1957 (photo vfm00040). Firn can be seen in many areas. The ice on the cliff on the left is much thicker than in 1957. August 30, 1965. Figure 34, U.S. Geological Survey Professional Paper 631. #1:/Mount Rainier National Park/vfm00044 ID. Veatch, F.M. 44 Mount Rainier National Park, Washington. The erosion of the old (pre-1840) lateral moraine on the east side of the glacier is shown by the series 11 photographs. The total erosion during the period 1947-65 appears to have averaged between 10 and 15 feet horizontally. August 25, 1947. Figure 35 (upper photo), U.S. Geological Survey Professional Paper 631. See also photo vfm00045. #1:/Mount Rainier National Park/vfm00045 ID. Veatch, F.M. 45 Mount Rainier National Park, Washington. The erosion of the old (pre-1840) lateral moraine on the east side of the glacier is shown by the series 11 photographs. The total erosion during the period 1947-65 appears to have averaged between 10 and 15 feet horizontally. September 4, 1965. Figure 35 (lower photo), U.S. Geological Survey Professional Paper 631. See also photo vfm00044. #1:/Mount Rainier National Park/vfm00046 ID. Veatch, F.M. 46 Mount Rainier National Park, Washington. Nisqually Valley below Nisqually Glacier, as seen from station 3 in 1934 prior to the October flood (date estimated). Note the substantial stand of trees and brush on the west part of the flood plain and the river on the east side of the flood plain. Photo by USGS Conservation Division, 1934. Figure 36, U.S. Geological Survey Professional Paper 631. See also photo vfm00047. #1:/Mount Rainier National Park/vfm00047 ID. Veatch, F.M. 47 Mount Rainier National Park, Washington. Nisqually Valley below Nisqually Glacier, as seen from station 3. West of the island of trees, most of the vegetation present in the 1934 view (photo vfm00046) is gone, due to the glacier outburst flood of October 1934. The river now flows west of this island of trees. The deck of the concrete highway bridge used prior to the October 13, 1932, flood is visible on the flood plain just below the island of trees. August 25, 1947. Figure 37, U.S. Geological Survey Professional Paper 631. #1:/Mount Rainier National Park/vfm00048 ID. Veatch, F.M. 48 Mount Rainier National Park, Washington. The Nisqually valley below Nisqually Glacier, as seen from station 3. Aggradation on the flood plain, caused by the outburst flood of October 25, 1955, is evidenced by altered topography and dead trees. A new bridge was constructed high above the flood-affected channels. August 31, 1965. Figure 38, U.S. Geological Survey Professional Paper 631. #1:/Mount Rainier National Park/vfm00049 ID. Veatch, F.M. 49 Mount Rainier National Park, Washington. River channel just above the highway bridge, viewed downstream from a cliff. Channel conditions illustrated in this view are about the same as those shown in photographs taken in 1943, 1947 and 1948. No major outburst floods occurred in this period. August 28, 1949. Figure 39-A, U.S. Geological Survey Professional Paper 631. See also photos vfm00051 and vfm00052. #1:/Mount Rainier National Park/vfm00051 ID. Veatch, F.M. 51 Mount Rainier National Park, Washington. River channel just above the highway Bridge, viewed downstream from a cliff. The October 25, 1955, glacier outburst flood has caused easily recognizable changes in the channel: 1, a large(13 by 19 by 25 feet, or 4 by 5.8 by 7.6 meters) boulder was deposited at the left; 2, a wider swath cut through vegetation; 3, a terrace formed along the left side of the flood plain; 4, many large boulders (one was 8 by 8 by 15 feet, or 2.6 by 2.6 by 4.9 meters) were deposited high on the left bank above and below the highway. August 28, 1956. Figure 39-C, U.S. Geological Survey Professional Paper 631. See also photos vfm00049 and vfm00052. #1:/Mount Rainier National Park/vfm00052 ID. Veatch, F.M. 52 Mount Rainier National Park, Washington. River channel just above the highway Bridge, viewed downstream from a cliff. In the 9-year interval since 1956, note the following: 1, the exceptionally large boulder at the left has not moved; 2, small terraces are visible at the left, caused by moderate-sized floods; 3, an alluvial fan (first visible in 1960) has been deposited by a right bank tributary on this side of the bridge. August 31, 1965. Figure 39-D, U.S. Geological Survey Professional Paper 631. #1:/Van Horn R. Collection/vhr00072 ID. Van Horn, R. 72ct Structural distress, of brick residence, caused by expansive soil. Golden. Jefferson County, Colorado. January 1971. #1:/Gros Ventre Landslide, Wyoming, June 23, 1925/vhr00129 ID. Van Horn, R. 129ct Gros Ventre Landslide, Wyoming, June 23, 1925.U.S. Forest Service plaque in the foreground. August 1963. #1:/Gros Ventre Landslide, Wyoming, June 23, 1925/vhr00130 ID. Van Horn, R. 130ct Gros Ventre Landslide, Wyoming, June 23, 1925. South side of the landslide northeast of Jackson. August 1963. #1:/Van Horn R. Collection/vhr00132 ID. Van Horn, R. 132ct Madison River slide, Madison dolomite buttress at right. Note construction equipment on and near slide for scale. Madison County, Montana. September 16, 1959. #1:/Van Horn R. Collection/vhr00147 ID. Van Horn, R. 147ct Draper silt in Salt Lake City locality S-42. Salt Lake County, Utah. May 1963. #1:/Van Horn R. Collection/vhr00228 ID. Van Horn, R. 228ct Panorama of Fort Douglas mudflow riding 8 feet up on outside of bend, Quarry Canyon. See also Van Horn 229ct. Sec. 36, T. 1 N., R. 1 E. Salt Lake County, Utah. May 24, 1975. #1:/Van Horn R. Collection/vhr00229 ID. Van Horn, R. 229ct Panorama of Fort Douglas mudflow riding 8 feet up on outside of bend, Quarry Canyon. See also Van Horn 228ct. Sec. 36, T. 1 N., R. 1 E. Salt Lake County, Utah. May 24, 1975. #1:/Van Horn R. Collection/vhr00232 ID. Van Horn, R. 232ct Channel eroded an estimated 7 feet to bedrock by Ft. Douglas mudflow. Quarry Canyon. Sec. 36, T. 1 N., R. 1 E. Salt Lake County, Utah. May 24, 1975. #1:/Van Horn R. Collection/vhr00235 ID. Van Horn, R. 235ct Close up view of waves in brick courses, Newhouse Hotel, caused by subsidence. Salt Lake County, Utah. April 7, 1970. #1:/Van Horn R. Collection/vhr00238 ID. Van Horn, R. 238ct Waves in brick courses of Newhouse Hotel, Main and 4th S. St., Salt Lake City, caused by subsidence. Salt Lake County, Utah. April 7, 1970. #1:/Van Horn R. Collection/vhr00275 ID. Van Horn, R. 275ct Over all view of rock slide on Interstate highway 80 in Echo Canyon, locality S224, SW 1/4, NW1/4 sec 10, T 3 N., R. 5 E. Henefer quadrangle. Trucks on highway for scale. Summit County, Utah. May 12, 1968. #1:/Van Horn R. Collection/vhr00276 ID. Van Horn, R. 276ct Lateral view from top of truck of rock slide on Interstate Highway 80 in Echo Canyon, SW 1/4, NW 1/4, Sec. 10, T. 3 N., R. 5 E. Henefer quadrangle. Summit County, Utah. May 12, 1968. #1:/Van Horn R. Collection/vhr00278 ID. Van Horn, R. 278ct Distant view of east face of toe of rock slide on Interstate highway 80 in Echo Canyon, locality S224, SW 1/4, NW 1/4 sec10, T 3 N., R. 5 E. Henefer quadrangle. Summit County, Utah. May 12, 1968. #1:/Varnes D.J. Collection/vjd00001 ID. Varnes, J.D. 1ct Rockslide on highway west of Minturn. Eagle County, Colorado. 1946. #1:/Vanderwilt J.W. Collection-Yule Company Marble Quarry/vjw00002 ID. Vanderwilt, J.W. 2 Cliff of white marble showing position of Yule Company marble quarry, the white dump at the left is from a prospect. Gunnison County, Colorado. ca. 1930. Plate 24 in U.S. Geological Survey. Bulletin 884. #1:/Vanderwilt J.W. Collection/vjw00026 ID. Vanderwilt, J.W. 26 Glacial grooves in Devonian dolomite in Yule Creek a little east of the Yule Colorado Quarry. Gunnison County, Colorado. 1937. #1:/Vaughan T.W. Collection/vtw00044 ID. Vaughan, T.W. 44 Cheyenne Indian Camp near Arapaho, Oklahoma. ca 1910. #1:/Vaughan T.W. Collection/vtw00046 ID. Vaughan, T.W. 46 Young Cheyenne squaw with two children near Arapaho, Oklahoma. ca 1910. #1:/Vaughan T.W. Collection/vtw00056 ID. Vaughan, T.W. 56 A fine residence, Greer County, Oklahoma. ca 1910. #1:/Van Alstine R.E. Collection-American Fluorspar Mine/vre00073 ID. Van Alstine, R.E. 73 Northwest from Arkansas River, showing the main fault zone between hills of Tertiary rhyolitic welded tuff (left) and Precambrian rocks (right) and the Colorado-American fluorspar mine. Chaffee County, Colorado. ca. 1945. Figure 5 in U.S. Geological Survey. Professional paper 626. 1969. #1:/Dry Tortugas National Park/vtw00251 ID. Vaughan, T.W. 251 Dry Tortugas National Park, Florida. Viaduct arches of the Florida East Coast Railroad on Long Key. April 1908. #1:/Dry Tortugas National Park/vtw00252 ID. Vaughan, T.W. 252 Dry Tortugas National Park, Florida. Down the Florida East Coast Railroad tracks toward Grassy Key, viewed from Long Key. April 1908. #1:/Dry Tortugas National Park/vtw00253 ID. Vaughan, T.W. 253 Dry Tortugas National Park, Florida. Florida East Coast Railway viaduct Arches on Long Key. April 1908. Photos vtw00253 and vtw00254 form a panorama. #1:/Dry Tortugas National Park/vtw00254 ID. Vaughan, T.W. 254 Dry Tortugas National Park, Florida. Florida East Coast Railway viaduct arches on Long Key. April 1908. Photos vtw00253 and vtw00254 form a panorama. #1:/Dry Tortugas National Park/vtw00255 ID. Vaughan, T.W. 255 Dry Tortugas National Park, Florida. East along the Florida East Coast Railroad at Long Key station(?). April 1908. #1:/Dry Tortugas National Park/vtw00256 ID. Vaughan, T.W. 256 Dry Tortugas National Park, Florida. Coconut grove on the west side of Long Key. April 1908. #1:/Dry Tortugas National Park/vtw00269 ID. Vaughan, T.W. 269 Dry Tortugas National Park, Florida. Western beach on Loggerhead Key, looking northeast toward the windmill. Note the indurated calcareous sandstone along the water's edge, the loose calcareous sands higher on the beach slope, and the continuity of the curve formed by the bedding of the lower indurated and higher unconsolidated material. May 1908. #1:/Dry Tortugas National Park/vtw00270 ID. Vaughan, T.W. 270 Dry Tortugas National Park, Florida. Lighthouse on Loggerhead Key, viewed from the west. May 1908. #1:/Dry Tortugas National Park/vtw00271 ID. Vaughan, T.W. 271 Dry Tortugas National Park, Florida. Carnegie Institution Marine Biological Laboratory, viewed from the northwest. May 1908. #1:/Dry Tortugas National Park/vtw00272 ID. Vaughan, T.W. 272 Dry Tortugas National Park, Florida. Kitchen and aquarium of the Carnegie Institution Marine Biological Laboratory, viewed from the back steps of the laboratory building. May 1908. #1:/Dry Tortugas National Park/vtw00273 ID. Vaughan, T.W. 273 Dry Tortugas National Park, Florida. Loggerhead Key lighthouse, viewed from the Carnegie Institution Marine Biological Laboratory. The vegetation in the foreground consists of bay cedar. May 1908. #1:/Dry Tortugas National Park/vtw00274 ID. Vaughan, T.W. 274 Dry Tortugas National Park, Florida. Dr.A.G. Mayer, Laboratory Director, and Professor W. Laurence Tower, University of Chicago, standing on the rear step of the Carnegie Institution Marine Biological Laboratory. May 1908. #1:/Dry Tortugas National Park/vtw00276 ID. Vaughan, T.W. 276 Dry Tortugas National Park, Florida. Windmill, kitchen, and aquarium of the Carnegie Institution Marine Biological Laboratory, viewed from the sea. May 1908. #1:/Dry Tortugas National Park/vtw00292 ID. Vaughan, T.W. 292 Dry Tortugas National Park, Florida. Looking toward Sally Port at Fort Jefferson, into the fort. May 1908 #1:/Dry Tortugas National Park/vtw00293 ID. Vaughan, T.W. 293 Dry Tortugas National Park, Florida. Southwest along the Fort Jefferson moat. Sally Port is on the right. May 1909. #1:/Dry Tortugas National Park/vtw00299 ID. Vaughan, T.W. 299 Dry Tortugas National Park, Florida. Coal shed on the east side, viewed from the south. Fort Jefferson is on the left. May 1909. #1:/Dry Tortugas National Park/vtw00300 ID. Vaughan, T.W. 300 Dry Tortugas National Park, Florida. Northeast side of Fort Jefferson, looking northwest along the moat. May 1909. #1:/Dry Tortugas National Park/vtw00301 ID. Vaughan, T.W. 301 Dry Tortugas National Park, Florida. Looking north from Sally Port at the interior of Fort Jefferson. May 1909 #1:/Dry Tortugas National Park/vtw00302 ID. Vaughan, T.W. 302 Dry Tortugas National Park, Florida. Interior of Fort Jefferson, looking west from Sally Port. May 1909. #1:/Dry Tortugas National Park/vtw00304 ID. Vaughan, T.W. 304 Dry Tortugas National Park, Florida. Southern coal shed, viewed from Sally Port at Fort Jefferson. May 1909. #1:/Dry Tortugas National Park/vtw00305 ID. Vaughan, T.W. 305 Dry Tortugas National Park, Florida. Government dock at Fort Jefferson, viewed from the southeast. May 1909. #1:/Dry Tortugas National Park/vtw00306 ID. Vaughan, T.W. 306 Dry Tortugas National Park, Florida. Government dock at Fort Jefferson, viewed from the east, toward a coal shed. May 1909 #1:/Dry Tortugas National Park/vtw00310 ID. Vaughan, T.W. 310 Dry Tortugas National Park, Florida. Loggerhead reef exposed at low tide. The Carnegie Institution Marine Biological Laboratory is seen in the background. June 6, 1910. #1:/Dry Tortugas National Park/vtw00311 ID. Vaughan, T.W. 311 Dry Tortugas National Park, Florida. Apparatus for planting corals. June 10, 1910. #1:/Dry Tortugas National Park/vtw00315 ID. Vaughan, T.W. 315 Dry Tortugas National Park, Florida. Culture jars containing coral planulae near a window. 1910. #1:/Dry Tortugas National Park/vtw00316 ID. Vaughan, T.W. 316 Dry Tortugas National Park, Florida. Storm-proof live car, showing method of attachment of titles at the Carnegie Institution Marine Biological Laboratory. June 9, 1910. #1:/Dry Tortugas National Park/vtw00317 ID. Vaughan, T.W. 317 Dry Tortugas National Park, Florida. Side view of storm-proof live car at the Carnegie Institution Marine Biological Laboratory. June 9, 1910. #1:/Dry Tortugas National Park/vtw00318 ID. Vaughan, T.W. 318 Dry Tortugas National Park, Florida. Anterior end of storm-proof car for growing corals. June 9, 1910. #1:/Dry Tortugas National Park/vtw00319 ID. Vaughan, T.W. 319 Dry Tortugas National Park, Florida. Fleet of floating live cars on Loggerhead Key. June 10, 1910. #1:/Dry Tortugas National Park/vtw00320 ID. Vaughan, T.W. 320 Dry Tortugas National Park, Florida. Storm-proof live car in the water. Loggerhead Key lighthouse in the background. June 11, 1910. #1:/Dry Tortugas National Park/vtw00321 ID. Vaughan, T.W. 321 Dry Tortugas National Park, Florida. Covered live car in the water. Loggerhead Key lighthouse in the background. June 11, 1910. #1:/Dry Tortugas National Park/vtw00322 ID. Vaughan, T.W. 322 Dry Tortugas National Park, Florida. Floating open car and light-proof live car. June 11, 1910. #1:/Dry Tortugas National Park/vtw00323 ID. Vaughan, T.W. 323 Dry Tortugas National Park, Florida. Northeast along the northwest face of the outer wall of the Fort Jefferson moat. Coral colonies are cemented to the tiles, and coral planulae are attached to the tiles along the outer face of this wall. June 9, 1910. #1:/Dry Tortugas National Park/vtw00324 ID. Vaughan, T.W. 324 Dry Tortugas National Park, Florida. View at water level inside the Fort Jefferson moat, looking northeast from the west entrance. June 9, 1910. #1:/Dry Tortugas National Park/vtw00349 ID. Vaughan, T.W. 349 Dry Tortugas National Park, Florida. Damage to the southern coal shed dock and buildings on Loggerhead Key caused by the hurricane of October 17, 1910. June 1911. #1:/Dry Tortugas National Park/vtw00351 ID. Vaughan, T.W. 351 Dry Tortugas National Park, Florida. Hurricane-wrecked coal shed dock on Garden Key. June 1911. #1:/Dry Tortugas National Park/vtw00352 ID. Vaughan, T.W. 352 Dry Tortugas National Park, Florida. Hurricane damage to the southern coal shed at Fort Jefferson after the storm of October 17, 1910. June 1911. #1:/Dry Tortugas National Park/vtw00353 ID. Vaughan, T.W. 353 Dry Tortugas National Park, Florida. Hurricane damage to the southern coal shed at Fort Jefferson after the storm of October 17, 1910. June 1911. #1:/Dry Tortugas National Park/vtw00354 ID. Vaughan, T.W. 354 Dry Tortugas National Park, Florida. Eastern coal shed at Fort Jefferson, viewed from sea side, after the hurricane of October 17, 1910. June 1911. #1:/Dry Tortugas National Park/vtw00355 ID. Vaughan, T.W. 355 Dry Tortugas National Park, Florida. Eastern coal shed, viewed from the Fort Jefferson moat wall, after the hurricane of October 17, 1910. June 1911. #1:/Dry Tortugas National Park/vtw00356 ID. Vaughan, T.W. 356 Dry Tortugas National Park, Florida. Eastern coal shed at Fort Jefferson, viewed from its dock, after the hurricane of October 17, 1910. June 1911. #1:/Dry Tortugas National Park/vtw00357 ID. Vaughan, T.W. 357 Dry Tortugas National Park, Florida. Eastern coal shed at Fort Jefferson, viewed from the land side, after the hurricane of October 17, 1910. June 1911 #1:/Dry Tortugas National Park/vtw00360 ID. Vaughan, T.W. 360 Dry Tortugas National Park, Florida. Looking seaward, southeast from the back door of the Carnegie Institution Marine Biological Laboratory. The concrete walk was buried by sand during the hurricane of October 17, 1910, and subsequently exhumed. The dark horizontal line above the walk is a plank to show the level of sand; it was 12 to 18 inches thick. June 1911. #1:/Dry Tortugas National Park/vtw00361 ID. Vaughan, T.W. 361 Dry Tortugas National Park, Florida. Carnegie Institution Marine Biological Laboratory, looking toward its backdoor. Storm-deposited sand is on the walkway. June 1911. #1:/Dry Tortugas National Park/vtw00362 ID. Vaughan, T.W. 362 Dry Tortugas National Park, Florida. Inside the southeast beach ridge, south of the Carnegie Institution Marine Biological Laboratory. Bay cedar trees were killed by the hurricane of October 1910. 1911. #1:/Dry Tortugas National Park/vtw00363 ID. Vaughan, T.W. 363 Dry Tortugas National Park, Florida. Northwest face, between the aquarium and men's quarters of the Carnegie Institution Marine Biological Laboratory, showing old live car, irons, etc. buried by 1910 storm-deposited sand. Black line at the top marks the upper surface of the sand. Storm-deposited sand addition was 4 to 5 feet. June 1911. #1:/Dry Tortugas National Park/vtw00364 ID. Vaughan, T.W. 364 Dry Tortugas National Park, Florida. Sand ridge on the northwest face of Loggerhead Key, northeast of the Carnegie Institution Marine Biological Laboratory aquarium. June 1911. #1:/Dry Tortugas National Park/vtw00365 ID. Vaughan, T.W. 365 Dry Tortugas National Park, Florida. Sand ridge northeast of the Carnegie Institution Marine Biological Laboratory aquarium. The plank is just above the soil line. The bay cedars were killed by the hurricane of October 17, 1910. June 1911. #1:/Dry Tortugas National Park/vtw00366 ID. Vaughan, T.W. 366 Dry Tortugas National Park, Florida. Sand deposited on the north side of the men's quarters at the Carnegie Institution Marine Biological Laboratory. June 1911. #1:/Dry Tortugas National Park/vtw00367 ID. Vaughan, T.W. 367 Dry Tortugas National Park, Florida. Inside the northwest beach ridge on Loggerhead Key, looking northwest. June 1911. #1:/Dry Tortugas National Park/vtw00368 ID. Vaughan, T.W. 368 Dry Tortugas National Park, Florida. View toward the Carnegie Institution Marine Biological Laboratory aquarium and wharf, showing the amount of retreat of the beach line during the October 1910 storm. The line formerly extended seaward on the piles that support the aquarium. June 1911. #1:/Dry Tortugas National Park/vtw00369 ID. Vaughan, T.W. 369 Dry Tortugas National Park, Florida. Northwest face of the Loggerhead Key beach, looking southwest from the aquarium.. June 1911. #1:/Dry Tortugas National Park/vtw00370 ID. Vaughan, T.W. 370 Dry Tortugas National Park, Florida. Sand spit built since 1910 on Loggerhead Key. June 1911. #1:/Dry Tortugas National Park/vtw00371 ID. Vaughan, T.W. 371 Dry Tortugas National Park, Florida. Sand spit built since 1910 on Loggerhead Key. June 1911. #1:/Dry Tortugas National Park/vtw00372 ID. Vaughan, T.W. 372 Dry Tortugas National Park, Florida. Method of rearing coral larvae, interior corner of the Carnegie Institution Marine Biological Laboratory aquarium. June 1911. #1:/Dry Tortugas National Park/vtw00373 ID. Vaughan, T.W. 373 Dry Tortugas National Park, Florida. Apparatus for measuring the volume of corals. June 1911. #1:/Dry Tortugas National Park/vtw00824 ID. Vaughan, T.W. 824 Dry Tortugas National Park, Florida. Spit on north end of Loggerhead Key. Horns recurved toward the east by swell from north 60 degrees west. May 25, 1913. #1:/Dry Tortugas National Park/vtw00825 ID. Vaughan, T.W. 825 Dry Tortugas National Park, Florida. Scarp of a wave-built terrace above the base of the north spit, Loggerhead Key. 1913. #1:/Dry Tortugas National Park/vtw00826 ID. Vaughan, T.W. 826 Dry Tortugas National Park, Florida. Terrace and beach, looking toward the Carnegie Institution Marine Biological Laboratory dining room on the northwest face of Loggerhead Key. 1913. #1:/Dry Tortugas National Park/vtw00829 ID. Vaughan, T.W. 829 Dry Tortugas National Park, Florida. Wave-built terrace and dunes near the Carnegie Institution Marine Biological Laboratory dining room. 1913. #1:/Dry Tortugas National Park/vtw00833 ID. Vaughan, T.W. 833 Dry Tortugas National Park, Florida. Seaward slope of a wave-built terrace on Loggerhead Key. 1913. #1:/Dry Tortugas National Park/vtw00834 ID. Vaughan, T.W. 834 Dry Tortugas National Park, Florida. Beach and seaward slope of a wave-built terrace, viewed from the beach. 1913. #1:/Dry Tortugas National Park/vtw00835 ID. Vaughan, T.W. 835 Dry Tortugas National Park, Florida. Beach on the northwest face of Loggerhead Key, looking southwest toward the lighthouse. 1913. #1:/Dry Tortugas National Park/vtw00836 ID. Vaughan, T.W. 836 Dry Tortugas National Park, Florida. Beach under the lighthouse wharf on the northwest face of Loggerhead Key. 1913. #1:/Dry Tortugas National Park/vtw00839 ID. Vaughan, T.W. 839 Dry Tortugas National Park, Florida. Beach opposite the Carnegie Institution Marine Biological Laboratory pump house on the southeast side of Loggerhead Key. 1913. #1:/Dry Tortugas National Park/vtw00842 ID. Vaughan, T.W. 842 Dry Tortugas National Park, Florida. Terrace between the lighthouse wharf and the southwest end of Loggerhead Key. 1913. #1:/Dry Tortugas National Park/vtw00845 ID. Vaughan, T.W. 845 Dry Tortugas National Park, Florida. Lighthouse keeper's dwelling, viewed from the end of their wharf on Loggerhead Key. 1913. #1:/Dry Tortugas National Park/vtw00846 ID. Vaughan, T.W. 846 Dry Tortugas National Park, Florida. Boat house, viewed from the west side of the lightkeeper's house on Loggerhead Key. 1913. #1:/Dry Tortugas National Park/vtw00847 ID. Vaughan, T.W. 847 Dry Tortugas National Park, Florida. Professor Gudger and a tiger shark caught off Loggerhead Key at the Carnegie Institution Marine Biological Laboratory. 1913. #1:/Dry Tortugas National Park/vtw01268 ID. Vaughan, T.W. 1268 Dry Tortugas National Park, Florida. Loggerhead Key beach. 1914. #1:/Dry Tortugas National Park/vtw01269 ID. Vaughan, T.W. 1269 Dry Tortugas National Park, Florida. Hook at the north end of Loggerhead Key. 1914. #1:/Dry Tortugas National Park/vtw01270 ID. Vaughan, T.W. 1270 Dry Tortugas National Park, Florida. Loggerhead Key beach. 1914. #1:/Dry Tortugas National Park/vtw01273 ID. Vaughan, T.W. 1273 Dry Tortugas National Park, Florida. Vegetation on Loggerhead Key. 1914. #1:/Dry Tortugas National Park/vtw01274 ID. Vaughan, T.W. 1274 Dry Tortugas National Park, Florida. North end of Loggerhead Key, viewed from the lighthouse. 1914. #1:/Dry Tortugas National Park/vtw01275 ID. Vaughan, T.W. 1275 Dry Tortugas National Park, Florida. South end of Loggerhead Key, viewed from the lighthouse. 1914. #1:/Dry Tortugas National Park/vtw01295 ID. Vaughan, T.W. 1295 Dry Tortugas National Park, Florida. Half-tide on Loggerhead Key. 1915. #1:/Dry Tortugas National Park/vtw01297 ID. Vaughan, T.W. 1297 Dry Tortugas National Park, Florida. Loggerhead Key beach at half-tide. 1915. #1:/Cape Cod National Seashore/vtw01322 ID. Vaughan, T.W. 1322 Cape Cod National Seashore, Massachusetts. Dune ridges about 1.5 miles north, 20 degrees east of Pilgrim Monument in Provincetown. August 23, 1916. #1:/Cape Cod National Seashore/vtw01323 ID. Vaughan, T.W. 1323 Cape Cod National Seashore, Massachusetts. Dune ridges about 1.5 miles north, 20 degrees east of Pilgrim Monument in Provincetown. August 23, 1916. #1:/Cape Cod National Seashore/vtw01324 ID. Vaughan, T.W. 1324 Cape Cod National Seashore, Massachusetts. Dune scoured out on the windward side, three-eights of a mile east of Peaked Bar life-saving station near Provincetown. August 26, 1916. #1:/Cape Cod National Seashore/vtw01325 ID. Vaughan, T.W. 1325 Cape Cod National Seashore, Massachusetts. East from Pilgrim Monument in Provincetown. August 29, 1916. #1:/Cape Cod National Seashore/vtw01326 ID. Vaughan, T.W. 1326 Cape Cod National Seashore, Massachusetts. East from Pilgrim Monument in Provincetown. August 29, 1916. #1:/Cape Cod National Seashore/vtw01327 ID. Vaughan, T.W. 1327 Cape Cod National Seashore, Massachusetts. North from Pilgrim Monument in Provincetown. August 29, 1916. #1:/Cape Cod National Seashore/vtw01328 ID. Vaughan, T.W. 1328 Cape Cod National Seashore, Massachusetts. North from Pilgrim Monument in Provincetown. August 29, 1916. #1:/Cape Cod National Seashore/vtw01329 ID. Vaughan, T.W. 1329 Cape Cod National Seashore, Massachusetts. Clapps Pond (right) and Shank Painters Pond (left), looking west from Pilgrim Monument in Provincetown. August 29, 1916 #1:/Cape Cod National Seashore/vtw01330 ID. Vaughan, T.W. 1330 Cape Cod National Seashore, Massachusetts. Shank Painters Pond, looking west from Pilgrim Monument in Provincetown. August 29, 1916. #1:/Cape Cod National Seashore/vtw01333 ID. Vaughan, T.W. 1333 Cape Cod National Seashore, Massachusetts. Dunes between Wood End and Long Point, steep side toward the harbor near Provincetown. August 29, 1916 #1:/Cape Cod National Seashore/vtw01334 ID. Vaughan, T.W. 1334 Cape Cod National Seashore, Massachusetts. Wood End beach, near Provincetown, at low tide. August 29, 1916 #1:/Cape Cod National Seashore/vtw01336 ID. Vaughan, T.W. 1336 Cape Cod National Seashore, Massachusetts. Northeast side of the marsh west of the breakwater at the southwest end of Provincetown. August 30, 1916. #1:/Cape Cod National Seashore/vtw01337 ID. Vaughan, T.W. 1337 Cape Cod National Seashore, Massachusetts. Northeast side of the marsh west of the breakwater at the southwest end of Provincetown. August 30, 1916. #1:/Cape Cod National Seashore/vtw01338 ID. Vaughan, T.W. 1338 Cape Cod National Seashore, Massachusetts. Northeast side of the marsh west of the breakwater at the southwest end of Provincetown. August 30, 1916. #1:/Cape Cod National Seashore/vtw01339 ID. Vaughan, T.W. 1339 Cape Cod National Seashore, Massachusetts. Dunes on the northeast side of the shore west of the breakwater in Provincetown. August 30, 1916. #1:/Cape Cod National Seashore/vtw01341 ID. Vaughan, T.W. 1341 Cape Cod National Seashore, Massachusetts. Beach and wave-cut cliff on the northwest side of Wood End lighthouse near Provincetown. August 30, 1916. #1:/Cape Cod National Seashore/vtw01342 ID. Vaughan, T.W. 1342 Cape Cod National Seashore, Massachusetts. North side of Pilgrim Lake at the east end of Provincetown. August 30, 1916 #1:/Cape Cod National Seashore/vtw01343 ID. Vaughan, T.W. 1343 Cape Cod National Seashore, Massachusetts. North side of Pilgrim Lake at the east end of Provincetown. August 30, 1916 #1:/Cape Cod National Seashore/vtw01344 ID. Vaughan, T.W. 1344 Cape Cod National Seashore, Massachusetts. North side of Pilgrim Lake at the east end of Provincetown. August 30, 1916 #1:/Cape Cod National Seashore/vtw01350 ID. Vaughan, T.W. 1350 Cape Cod National Seashore, Massachusetts. Cliff at Highland Light. September 1, 1916. #1:/Cape Cod National Seashore/vtw01351 ID. Vaughan, T.W. 1351 Cape Cod National Seashore, Massachusetts. Cliff at Highland Light. September 1, 1916. #1:/Cape Cod National Seashore/vtw01352 ID. Vaughan, T.W. 1352 Cape Cod National Seashore, Massachusetts. Pilgrim Heights sign on the southwest face of the cliff. September 1, 1916. #1:/Mesa Verde National Park/waa00003 ID. Wanek, A.A. 3 Mesa Verde National Park, Colorado. Square Tower House is in a great alcove in Cliff House Sandstone. Circa 1952. Plate 40-A, U.S. Geological Survey Bulletin 1072-M. #1:/Mesa Verde National Park/waa00006 ID. Wanek, A.A. 6 Mesa Verde National Park, Colorado. Point Lookout. Point Lookout Sandstone(Kpl) forms prominent cliffs underlain by soft Mancos Shale (Km). The government road is cut in Mancos Shale. Circa 1952. Plate 41-B, U.S. Geological Survey Bulletin 1072-M. #1:/Mesa Verde National Park/waa00015 ID. Wanek, A.A. 15 Mesa Verde National Park, Colorado. Spruce Tree House is situated in a large alcove on a bench between Barker Dome tongue and lower tongue of Cliff House Sandstone. Circa 1952. Plate 46-A, U.S. Geological Survey Bulletin 1072-M. #1:/Whitman R.E. Collection/waao0001 ID. Waananen, A.O. 1 Flood isolated gaging station on Battle Creek, downstream from Coleman Fish Hatchery near Cottonwood. Photo by R.E. Whitman. Shasta County, California. December 22, 1964. Figure 13 in U.S. Geological Survey. Water-supply paper 1866-A. 1971. #1:/Alaska/wah00136 ID. Wahrhaftig, C. 136 Alaska. Polygonal ground on a mountaintop east of Rex Dome in the Alaska Range. The clay-rich centers swell and collapse sufficiently from freezing and thawing ice that they destroy the roots of any plants that grow on them. Plants gain footholds only along the relatively clay-free borders, which do not heave as much as the centers. Plate 2, figure 11, U.S. Geological Survey Professional Paper 482. #1:/Alaska/wah00137 ID. Wahrhaftig, C. 137 Alaska. Stone polygons east of Maclaren River in the Clearwater Mountains. Note the complete sorting between the clay-rich centers and the bordering lines of coarse boulders. Plate 2, figure 12, U.S. Geological Survey Professional Paper 482. #1:/Glacier Bay National Park and Preserve/wah00138 ID. Wahrhaftig, C. 138 Glacier Bay National Park and Preserve, Alaska. Fairweather Range, in the background, towers over the Alsek Ranges in the foreground. Mount La Perouse (10,728 feet) is left of center and Mount Crillon (12,726 feet) near right on skyline. Geikie Glacier in the center foreground is surrounded by mountains 4,500 feet high. View is west from over Glacier Bay. Photo by U.5. Navy, 1929. Plate 6, figure 6, U.S. Geological Survey Professional Paper 482. #1:/Walcott Collection/wcd00001 ID. Walcott, C.D. 1 Volcanic rocks west of Pharoc Spring, Nevada. Lincoln Co. Nevada. 1885. #1:/Walcott Collection/wcd00002 ID. Walcott, C.D. 2 Looking towards the cliffs from south of Virgin City, Utah. Washington Co. Utah. 1885. #1:/Walcott Collection/wcd00003 ID. Walcott, C.D. 3 Unconformity of Quaternary and Paleozoic, looking east from Panaca. Lincoln. Co. Nevada. 1885. #1:/Walcott Collection/wcd00004 ID. Walcott, C.D. 4 Permian Butte, from Workman's Spring, Southern Utah. Washington Co., Utah. 1885. #1:/Walcott Collection/wcd00005 ID. Walcott, C.D. 5 Permian Cliff, east of Toquerville. Washington Co., Utah. 1885. #1:/Walcott Collection/wcd00006 ID. Walcott, C.D. 6 Permian Cliff, east of Toquerville. Washington Co., Utah. 1885. #1:/Walcott Collection/wcd00007 ID. Walcott, C.D. 7 Mountains, west from Hiko. Lincoln. Co. Nevada. 1885 #1:/Walcott Collection/wcd0007a ID. Walcott, C.D. 7a Mountains, west from Hiko. Lincoln. Co. Nevada. 1885 #1:/Walcott Collection/wcd00008 ID. Walcott, C.D. 8 Lava resting against Carboniferous, east of Toquerville, Utah. Washington County, Utah. 1885. #1:/Walcott Collection/wcd00009 ID. Walcott, C.D. 9 Unconformity between Carboniferous and Permian. On Hurricane Cliff, 10 miles south of Toquerville, Utah. Washington County, Utah. 1885. #1:/Canada-Bulletin 319/wcd00011 ID. Walcott, C.D. 11 Artesian Reservoirs; crushed zone on fault; between Archean gneiss and Trenton limestone and Utica shale, just south of Montmorency Falls: Dr. A.R.C. Selwyn standing on gneiss. Canada. Plate 6-B in U.S. Geological Survey. Bulletin 319. 1908 #1:/Walcott Collection/wcd00012 ID. Walcott, C.D. 12 Fault between Archean Gneiss and Trenton Limestones and Utica Shale, just south of Montmorency Falls, Canada. Dr. Ells standing on line of contact. 1889. Canada. #1:/Walcott Collection/wcd00013 ID. Walcott, C.D. 13 Unconformable contact of Gneiss and Trenton Limestones; half-mile up from Montmorency Falls, Canada. Dr. A.R.C. Selwyn is leaning against the Trenton Limestone. 1889. Canada. #1:/Walcott Collection/wcd00014 ID. Walcott, C.D. 14 Anticlinal in Levis Terrance; on roadside leading up the bluff, above Levis railway station. Province of Quebec, Canada. 1889. #1:/Walcott Collection/wcd00015 ID. Walcott, C.D. 15 South shore of St. Lawrence River; 9 miles below Quebec, Canada. Plication of Shales and Sandstones of the Sillery Terrance. 1889. #1:/Walcott Collection/wcd00018 ID. Walcott, C.D. 18 Cherty layers interbedded in Sillery Shales; 8 miles below Quebec, Canada, on the south shore of St. Lawrence River. 1889. #1:/Walcott Collection/wcd00020 ID. Walcott, C.D. 20 Upper portion of Montmorency Falls, below Quebec, Canada. 1889. #1:/Walcott Collection/wcd00021 ID. Walcott, C.D. 21 Conglomerate of limestone, quartz, trap, etc. boulders, situated about 1500 feet down in the Sillery red shales; five miles below Quebec, Canada, on south shore of St. Lawrence River. Dr. R.W. Ells, of the Geological Survey of Canada, in view. 1889. #1:/Walcott Collection/wcd00022 ID. Walcott, C.D. 22 City of Quebec, from Point Levis, Canada. 1889. #1:/Walcott Collection/wcd00023 ID. Walcott, C.D. 23 City of Quebec, from Point Levis, Canada. 1889. #1:/Walcott Collection/wcd00025 ID. Walcott, C.D. 25 Elm Tree, Highgate Springs. Franklin County, Vermont. 1889 #1:/Walcott Collection/wcd00028 ID. Walcott, C.D. 28 Upturned Upper Cambrian Shales; below Highgate Falls, Vermont. Franklin County, Vermont. 1889. #1:/Walcott Collection/wcd00029 ID. Walcott, C.D. 29 Highgate Falls, Franklin Creek, Vermont. Franklin County, Vermont. 1889. #1:/Walcott Collection/wcd00030 ID. Walcott, C.D. 30 Plane of Overthrust Fault, north side of river below Highgate Falls, Vermont. Franklin County, Vermont. 1889. #1:/Walcott Collection/wcd00031 ID. Walcott, C.D. 31 Plane of Overthrust Fault, north side of river below Highgate Falls, Vermont. Franklin County, Vermont. 1889. #1:/Walcott Collection/wcd00034 ID. Walcott, C.D. 34 Boulder of Limestone embedded in Upper Cambrian Shales, below upper falls on Hungerford Brook, one mile south of Highgate Falls, Vermont. Franklin County, Vermont. 1889. #1:/Walcott Collection/wcd00037 ID. Walcott, C.D. 37 Contact of rocks of Lower Cambrian and Lower Ordovician age; on the line of the Great Fault, about 2 1/2 miles northeast of Highgate Springs, Vermont. Franklin County, Vermont. 1889. #1:/Walcott Collection/wcd00038 ID. Walcott, C.D. 38 Contact of rocks of Lower Cambrian and Lower Ordovician age; on the line of the Great Fault, about 2 1/2 miles northeast of Highgate Springs, Vermont. Franklin County, Vermont. 1889. #1:/Walcott Collection/wcd00039 ID. Walcott, C.D. 39 Seams of Limestone filled with Calcspar. Calciferous formation; near Limekiln Point, Highgate Springs, Vermont. Franklin County, Vermont. 1889. #1:/Walcott Collection/wcd00040 ID. Walcott, C.D. 40 Seams of Limestone filled with Calcspar. Calciferous formation; near Limekiln Point, Highgate Springs, Vermont. Franklin County, Vermont. 1889. #1:/Walcott Collection/wcd00041 ID. Walcott, C.D. 41 Seams of Limestone filled with Calcspar. Calciferous formation; near Limekiln Point, Highgate Springs, Vermont. Franklin County, Vermont. 1889. #1:/ Pennsylvania-Bulletin 134/wcd00043 ID. Walcott, C.D. 43 Brecciated limestone in Lower Ordovician southeast of Highgate Springs, Franklin County, Vermont. 1889. Plate 10 in US Geological Survey Bulletin 134. 1896 #1:/Walcott Collection/wcd00044 ID. Walcott, C.D. 44 Cliff of Lorraine Rocks. Topman's Gulf, Jefferson County, New York. Utica shale. 1889. #1:/Walcott Collection/wcd00045 ID. Walcott, C.D. 45 Cliff of Topman's Gulf, Jefferson County, New York. Lorraine Rocks. Utica shale fauna occurs where Mr. Rust is standing. Jefferson County, New York. 1889. #1:/Walcott Collection/wcd00046 ID. Walcott, C.D. 46 Cliff of Topman's Gulf, Jefferson County, New York. Lorraine Rocks. Utica shale with interbedded Sandstone of the Lorraine Series coming in above. Jefferson County, New York. 1889. #1:/Walcott Collection/wcd00047 ID. Walcott, C.D. 47 William P. Rust, Collector U.S. Geological Survey. Jefferson County, New York. 1889. #1:/Walcott Collection/wcd00050 ID. Walcott, C.D. 50 Interior of Dixon Plumbago Mine, four miles west of Hague, Warren County, New York. 1890. #1:/Walcott Collection/wcd00052 ID. Walcott, C.D. 52 Black-rock Granite quarry, three miles northeast of Westport, Essex County, New York. 1890. #1:/Walcott Collection/wcd00053 ID. Walcott, C.D. 53 Interior of Dixon Plumbago Mine, four miles west of Hague, Warren County, New York. 1890. #1:/Walcott Collection/wcd00054 ID. Walcott, C.D. 54 Interior of Dixon Plumbago Mine, four miles west of Hague, Warren County, New York. 1890. Probably C. Vanhise for scale. #1:/Walcott Collection/wcd00055 ID. Walcott, C.D. 55 Stratified garnetiferous rock above Dixon plumbago mine four miles west of Hague, Warren County, New York. 1890. #1:/Walcott Collection/wcd00056 ID. Walcott, C.D. 56 Crystalline Algonkian Limestone in bedded layers, on roadside north of Cheever ore-bed, Essex County, New York. 1890. #1:/Walcott Collection/wcd00057 ID. Walcott, C.D. 57 Conception Bay, Newfoundland. Panorama. 1888. #1:/Walcott Collection/wcd00058 ID. Walcott, C.D. 58 Conception Bay, Newfoundland. Panorama. 1888. #1:/Walcott Collection/wcd00061 ID. Walcott, C.D. 61 Falls on Manuel's Brook. Conception Bay, Newfoundland. Panorama. 1888. #1:/Walcott Collection/wcd00062 ID. Walcott, C.D. 62 Looking after Paradoxidea. Manuel's River. Conception Bay, Newfoundland. Mr. and Mrs. C.D. Walcott (Helena Burrows Stevens). 1888. #1:/Walcott Collection/wcd00069 ID. Walcott, C.D. 69 Quarry of the Hydeville Slate Company, near head of Lake Bomaseen, Rutland County, Vermont. 1890. #1:/Walcott Collection/wcd00070 ID. Walcott, C.D. 70 Quarry of the Hydeville Slate Company, near head of Lake Bomaseen, Rutland County, Vermont. 1890. #1:/Vermont-Bulletin 272/wcd00071 ID. Walcott, C.D. 71 Haystack Mountain, Pawlet, looking north; the central part of a very open syncline of schist. Rutland County, Vermont. 1891. Plate 6-B in U.S. Geological Survey. Bulletin 272. 1905. #1:/Walcott Collection/wcd00073 ID. Walcott, C.D. 73 Summit of an Anticlinal Fold, four miles west of Wells, Rutland County, Vermont. 1891. #1:/Walcott Collection/wcd00074 ID. Walcott, C.D. 74 Plicated Slates, one and one-half miles east of Wells post-office, Rutland County, Vermont. 1891. #1:/Walcott Collection/wcd00075 ID. Walcott, C.D. 75 Plicated Slates, one and one-half miles east of Wells post-office, Rutland County, Vermont. 1891. #1:/Walcott Collection/wcd00078 ID. Walcott, C.D. 78 Agnotozoic Rocks in cut on the D. & H.R.R. Putnam Station, Washington County, New York. 1887. #1:/Walcott Collection/wcd00079 ID. Walcott, C.D. 79 Agnotozoic Rocks in cut on the D. & H.R.R. Putnam Station, Washington County, New York. 1887. #1:/Walcott Collection/wcd00082 ID. Walcott, C.D. 82 Cliff of Calciferous Sandrock - Poultney River above Whitehall. Washington County, New York. 1887. #1:/Walcott Collection/wcd00086 ID. Walcott, C.D. 86 Bald Mountain looking from the south. Washington County, New York. 1887. #1:/Walcott Collection/wcd00088 ID. Walcott, C.D. 88 Distant view of Bald Mountain looking from the south. Washington County, New York. 1887. #1:/New York-Images/wcd00093 ID. Walcott, C.D. 93 Boulder embedded in crystalline limestone, one mile north of Fort Ann. Washington County, New York. 1890. Right photograph page 13 , Images of the U.S. Geological Survey, 1879-1979. Charles Van Hise in for scale. #1:/Walcott Collection/wcd00094 ID. Walcott, C.D. 94 Boulders in Algonkian crystalline limestone, two miles north of Port Henry, Essex County, New York. 1890. #1:/Walcott Collection/wcd00095 ID. Walcott, C.D. 95 Interbedded layers of hornblende gneiss in Algonkian crystalline limestone, on roadside two miles north of Port Henry, Essex County, New York. 1890. #1:/Walcott Collection/wcd00096 ID. Walcott, C.D. 96 Large boulder in Algonkian crystalline limestone, one mile north of Fort Ann, on roadside to Comstock's. Washington County, New York. 1890. #1:/Walcott Collection/wcd00097 ID. Walcott, C.D. 97 Middle quarry of the Penrhyn Slate Company, Middle Granville. Illustration of the bedding of the roofing slate. Washington County, New York. 1890. #1:/Walcott Collection/wcd00099 ID. Walcott, C.D. 99 Middle quarry of the Penrhyn Slate Company, Middle Granville. Showing a brecciated limestone conglomerate, in a massive layer, coincident with the cleavage of the roofing slate. North and east sides of the quarry. Washington County, New York. 1890. #1:/Walcott Collection/wcd00100 ID. Walcott, C.D. 100 Middle quarry of the Penrhyn Slate Company, Middle Granville. Showing a brecciated limestone conglomerate on the same line of bedding as the laminae of the roofing slate. North and east sides of the quarry. Washington County, New York. 1890. #1:/Walcott Collection/wcd00101 ID. Walcott, C.D. 101 Halls Quarry, S.W. Whitehall Township. Washington County, New York. 1891. #1:/Walcott Collection/wcd00102 ID. Walcott, C.D. 102 Folding in red and green roofing slates, Hall's Quarry, southeast portion of Whitehall Township. Washington County, New York. 1891. #1:/Walcott Collection/wcd00103 ID. Walcott, C.D. 103 Falls of the Mettowee, east of Granville. Folds occur in the slate beside the falls. Washington County, New York. 1890. #1:/Walcott Collection/wcd00104 ID. Walcott, C.D. 104 Sandstone in Hudson Shales. Town of Argyle. Washington County, New York. 1887. #1:/Walcott Collection/wcd00105 ID. Walcott, C.D. 105 North Granville, New York and terraces from hill south east of the village. Washington County, New York. 1891. #1:/Walcott Collection/wcd00107 ID. Walcott, C.D. 107 Mettomee River and Terraces from east end of North Granville. Washington County, New York. 1891. #1:/Walcott Collection/wcd00112 ID. Walcott, C.D. 112 Distant view of "High Falls" at Trenton Falls. Oneida County. New York. 1891. #1:/Walcott Collection/wcd00113 ID. Walcott, C.D. 113 Illustration of the decay of the upper semi-crystalline beds of the Trenton limestone at Rust's quarry on east bank of the West Canada Creek above Trenton Falls. Oneida County. New York. 1891. #1:/Walcott Collection/wcd00117 ID. Walcott, C.D. 117 "High Falls" at Trenton Falls. Oneida County. New York. 1891. #1:/Walcott Collection/wcd00118 ID. Walcott, C.D. 118 Cut in drift about one mile northwest of Gravesville Herkimer County, New York. 1891. #1:/Walcott Collection/wcd00119 ID. Walcott, C.D. 119 Natural Bridge, looking from southeast side. Rockbridge County, Virginia. 1891. Figure 100 in Introductory Geology by Chamberlin and Salisburg 1914. #1:/Walcott Collection/wcd00120 ID. Walcott, C.D. 120 Natural Bridge, looking from southeast side. Rockbridge County, Virginia. 1891. #1:/Walcott Collection/wcd00121 ID. Walcott, C.D. 121 Natural Bridge, looking from southeast side. Rockbridge County, Virginia. 1891. #1:/Walcott Collection/wcd00122 ID. Walcott, C.D. 122 Southeast side of Natural Bridge. Rockbridge County, Virginia. 1891. Left photograph page 13, Images of the U.S. Geological Survey, 1879-1979. #1:/Walcott Collection/wcd00123 ID. Walcott, C.D. 123 Natural Bridge, looking from southeast side and through the arch. Rockbridge County, Virginia. 1891. #1:/Walcott Collection/wcd00124 ID. Walcott, C.D. 124 Natural Bridge, looking from southeast side and through the arch. Rockbridge County, Virginia. 1891. #1:/Walcott Collection/wcd00125 ID. Walcott, C.D. 125 The man of the Natural Bridge. Rockbridge County, Virginia. 1891. #1:/Walcott Collection/wcd00126 ID. Walcott, C.D. 126 Upper side of the arch of the Natural Bridge taken from the creek bed beneath. Rockbridge County, Virginia. 1891. #1:/Walcott Collection/wcd00127 ID. Walcott, C.D. 127 Natural Bridge. Distant view looking west. Rockbridge County, Virginia. 1891. #1:/Walcott Collection/wcd00128 ID. Walcott, C.D. 128 Span of the arch of the Natural Bridge looking from the northwest side Rockbridge County, Virginia. 1891. #1:/Walcott Collection/wcd00129 ID. Walcott, C.D. 129 Plicated slaty limestone in bed of Cedar Creek about one mile below the Natural Bridge. Rockbridge County, Virginia. 1891. #1:/Walcott Collection/wcd00130 ID. Walcott, C.D. 130 Folds in Cambrian shales on north bank of Cedar Creek one and 1/2 miles below the Natural Bridge. Rockbridge County, Virginia. 1891. #1:/Walcott Collection/wcd00132 ID. Walcott, C.D. 132 Quartzite ridge, north of Balcony Falls, Virginia. East side of North River. Taken from Glasgow. Rockbridge County, Virginia. 1891. #1:/Walcott Collection/wcd00133 ID. Walcott, C.D. 133 Illustration of erosion of slaty, banded limestone in bed of Cedar Creek about one mile below the Natural Bridge, Virginia. Rockbridge County, Virginia. 1891. #1:/Walcott Collection/wcd00134 ID. Walcott, C.D. 134 Lentile of sand in gravel bed. Railroad cut one mile above Glasgow, on Shenandoah Valley Railroad. South side of North River. Rockbridge County, Virginia. 1891. #1:/Walcott Collection/wcd00135 ID. Walcott, C.D. 135 Contourted slaty limestone in bed of Cedar Creek about one mile below the Natural Bridge. Massive limestone in foreground. Rockbridge County, Virginia. 1891. #1:/Walcott Collection/wcd00137 ID. Walcott, C.D. 137 Folds in Cambrian sandstone and shales in railroad cut about one and 1/2 miles above Hampton. Carter County, Tennessee. 1891. #1:/Walcott Collection/wcd00138 ID. Walcott, C.D. 138 Folds in Cambrian sandstone and shales in railroad cut about one and 1/2 miles above Hampton. Carter County, Tennessee. 1891. #1:/Walcott Collection/wcd00139 ID. Walcott, C.D. 139 Compressed anticlinal, and a fault plane in sandstones of the Nashville Series. Near west end of Little River Gap. Chilhowee Mountain. Blount County, East Tennessee. 1891. #1:/Walcott Collection/wcd00144 ID. Walcott, C.D. 144 Cliff of Cambrian sandstone south side of Doe River Gorge, about 2 miles above Hampton. Carter County, Tennessee. 1891. #1:/Walcott Collection/wcd00146 ID. Walcott, C.D. 146 Dakota Jura Hogback, at Canyon City. Freemont County. Colorado. 1890. #1:/Walcott Collection/wcd00148 ID. Walcott, C.D. 148 Alternations of Gneiss and Schist (Algonkian) on south side of the Arkansas River, a little above Hot Springs Hotel, Canyon City. Freemont County. Colorado. 1890. #1:/Walcott Collection/wcd00150 ID. Walcott, C.D. 150 Contact of pre-Paleozoic and Silurian rocks on the north side of the Arkansas River, below the mouth of the canyon. Canyon City. Freemont County. Colorado. 1890. #1:/Colorado-Professional paper 52/wcd00151 ID. Walcott, C.D. 151 Harding sandstone on gneiss and schists 1.5 miles northwest of Canyon [City], looking north from below spring west of Harding's quarry. The man's feet are on the contact. Fremont County, Colorado. 1890. Plate 19-B in U.S. Geological Survey. Professional paper 52. 1906. #1:/Walcott Collection/wcd00152 ID. Walcott, C.D. 152 Contact of Silurian Sandstone on pre-Paleozoic Gneiss and Schists. Looking north from below the spring west of the Harding Sandstone Quarry, one milenorth of the Arkansas River and one and 1/2 mile northwest of Canyon City. Canyon City. Freemont County. Colorado. 1890. #1:/Colorado-Professional paper 52/wcd00153 ID. Walcott, C.D. 153 Quarry in Harding sandstone on east slope of mountains 2.5 miles northwest of Canyon [City], looking north, Granite to left, Harding sandstone in quarry, Fremont limestone and "Red Beds" in slopes to right. Fremont County, Colorado. 1890. Plate 8-A in U.S. Geological Survey. Professional paper 52. 1906. #1:/Walcott Collection/wcd00154 ID. Walcott, C.D. 154 Silurian Section, two and 1/2 miles northwest of Canyon City. Looking north. Fremont County, Colorado. 1890. #1:/Walcott Collection/wcd00155 ID. Walcott, C.D. 155 Silurian Section, two and 1/2 miles northwest of Canyon City. Looking north. Fremont County, Colorado. 1890. #1:/Walcott Collection/wcd00156 ID. Walcott, C.D. 156 Silurian Section, two and 1/2 miles northwest of Canyon City. Looking north. Fremont County, Colorado. 1890. #1:/Colorado-Professional paper 52/wcd00158 ID. Walcott, C.D. 158 Shale member lying between top of Harding sandstone and base of Fremont limestone on mountain slope northwest of Canyon City, Fremont County, Colorado. 1890. Plate 19-A in U.S. Geological Survey. Professional paper 52. 1906. #1:/Walcott Collection/wcd00159 ID. Walcott, C.D. 159 Rough weathering Silurian limestones above sandstones, two and 1/2 miles northwest of Canyon City. Fremont County, Colorado. 1890. #1:/Colorado-Professional paper 52/wcd00160 ID. Walcott, C.D. 160 Fremont limestone northwest of Canyon [City], shows irregular erosion forms. Fremont County, Colorado. 1890. Plate 8-B in U.S. Geological Survey. Professional paper. 52. 1906. #1:/Walcott Collection/wcd00163 ID. Walcott, C.D. 163 Upper Limestone Series, two and 1/2 miles northwest of Canyon City. Fremont County, Colorado. 1890. #1:/Walcott Collection/wcd00164 ID. Walcott, C.D. 164 Upper Limestone Series, two and 1/2 miles northwest of Canyon City. Fremont County, Colorado. 1890. #1:/Walcott Collection/wcd00165 ID. Walcott, C.D. 165 Looking north from Parkdale road, about 5 miles North-northwest of Canyon City. Silurian sandstones with superjacent limestones. The dark base is formed of pre-Paleozoic gneisses and schists. Fremont County, Colorado. 1890. #1:/Walcott Collection/wcd00166 ID. Walcott, C.D. 166 Looking north from Parkdale road, about 5 miles North-northwest of Canyon City. Silurian sandstones with superjacent limestones. The dark base is formed of pre-Paleozoic gneisses and schists. Fremont County, Colorado. 1890. #1:/Walcott Collection/wcd00167 ID. Walcott, C.D. 167 Harding Sandstone Quarry, two and 1/2 miles northwest of Canyon City. Fremont County, Colorado. 1890. #1:/Walcott Collection/wcd00168 ID. Walcott, C.D. 168 Unconformity and line of contact between Trenton Limestone and bedded Gneiss; 1/2 mile above Montmorency Falls, Canada. Dr. A.R.C. Slewyn is standing on the edge of the bedded gneiss and leaning against the Trenton limestone. Quebec Province. Canada. 1890. #1:/Walcott Collection/wcd00169 ID. Walcott, C.D. 169 Brecciated Limestone Conglomerate; Calciferous Zone; one mile south of Highgate Falls. Frankin County. Vermont. 1890. #1:/Walcott Collection/wcd00170 ID. Walcott, C.D. 170 Summit of Carboniferous limestone. Hurricane Cliff about 10 miles south of Toquerville. Washington County. Utah. 1890. #1:/Walcott Collection/wcd00171 ID. Walcott, C.D. 171 Compressed anticlinal and a fault plane in sandstones of the Nashville Series. Near west end of Little River Gap. Chilhowee Mountain. Blount County, East Tennessee. 1890. #1:/Colorado-Professional paper 52/wcd00172 ID. Walcott, C.D. 172 "Dakota" hogback ridge 2 miles southwest of Canyon [City], looking north, valley of Graneros shale in foreground; mountains of gneiss in distance. Fremont County, Colorado. 1892. Plate 5-B in U.S. Geological Survey. Professional paper 52. 1906. #1:/Walcott Collection/wcd00175 ID. Walcott, C.D. 175 Looking up Helena Canyon, at head of Garden Park, northeast of Canyon city. Fremont County, Colorado. 1892. #1:/Walcott Collection/wcd00176 ID. Walcott, C.D. 176 Looking up Helena Canyon, at head of Garden Park, northeast of Canyon city. Fremont County, Colorado. 1892. #1:/Walcott Collection/wcd00178 ID. Walcott, C.D. 178 Looking up Helena Canyon, at head of Garden Park, northeast of Canyon city. Fremont County, Colorado. 1892. #1:/Walcott Collection/wcd0178b ID. Walcott, C.D. 178b Looking up Helena Canyon, at head of Garden Park, northeast of Canyon city. Fremont County, Colorado. 1892. #1:/Walcott Collection/wcd00181 ID. Walcott, C.D. 181 Conglomerate Limestone. Quarry 1/4 of a mile north of Stoner's Station, York and Wrightsville Railroad. York County. Pennsylvania. 1892. #1:/Pennsylvania-Bulletin 134/wcd0181a ID. Walcott, C.D. 181a Limestone conglomerate at quarry one-quarter mile north of Stoners Station, York and Wrightsville Station, York County, Pennsylvania. 1892. Plate 12 in US Geological Survey Bulletin 134. 1896 #1:/Walcott Collection/wcd00182 ID. Walcott, C.D. 182 Portion of massive layer of Conglomerate Limestone. Quarry, one-fourth of a mile north of Stoner's Station, York and Wrightsville Railroad. York County, Pennsylvania. 1892. #1:/Walcott Collection/wcd00183 ID. Walcott, C.D. 183 Banded Lower Cambrian Rocks, just southeast of Emigsville. York County, Pennsylvania. 1892. #1:/Pennsylvania-Bulletin 134/wcd00184 ID. Walcott, C.D. 184 Banded Lower Cambrian rocks one-fourth mile southwest of Emigsville, York County, Pennsylvania. 1892. Plate 3 in US Geological Survey Bulletin 134. 1896. #1:/ Pennsylvania-Bulletin 134/wcd00185 ID. Walcott, C.D. 185 Central Portion of the Chickies Quartzite at Chickies Rock, on the Susquehanna River, Lancaster County, Pennsylvania. 1892. Plate 2 in US Geological Survey Bulletin 134. 1896. #1:/Walcott Collection/wcd00186 ID. Walcott, C.D. 186 "Chiques Rock", looking north. Lancaster County. Pennsylvania. 1892. #1:/Walcott Collection/wcd00187 ID. Walcott, C.D. 187 "Chiques Rock", looking south. Lancaster County. Pennsylvania. 1892. #1:/Walcott Collection/wcd00188 ID. Walcott, C.D. 188 Shales, broken down by superincumbent weight, or creeping. Half a mile north of Columbia. Lancaster County. Pennsylvania. 1892. #1:/Walcott Collection/wcd0188a ID. Walcott, C.D. 188a Shales, broken down by superincumbent weight, or creeping. Half a mile north of Columbia, beside the Pennsylvania Railroad tracks. Lancaster County. Pennsylvania. 1892. #1:/Walcott Collection/wcd00189 ID. Walcott, C.D. 189 Slates, cleaved at nearly right angles to the bedding. Two miles west of Harper's Ferry, Virginia on the Baltimore and Ohio Railroad. 1892. #1:/Walcott Collection/wcd00190 ID. Walcott, C.D. 190 Panoramic view of folded strata of Baltimore and Ohio Railroad, two miles west of Harper's Ferry, Virginia. 1892. #1:/Walcott Collection/wcd0190a ID. Walcott, C.D. 190a Panoramic view of folded strata of Baltimore and Ohio Railroad, two miles west of Harper's Ferry, Virginia. 1892. #1:/Walcott Collection/wcd0190b ID. Walcott, C.D. 190b Panoramic view of folded strata of Baltimore and Ohio Railroad, two miles west of Harper's Ferry, Virginia. 1892. #1:/Walcott Collection/wcd0190c ID. Walcott, C.D. 190c Panoramic view of folded strata of Baltimore and Ohio Railroad, two miles west of Harper's Ferry, Virginia. 1892. #1:/Walcott Collection/wcd0190d ID. Walcott, C.D. 190d Panoramic view of folded strata of Baltimore and Ohio Railroad, two miles west of Harper's Ferry, Virginia. 1892. #1:/Walcott Collection/wcd0190e ID. Walcott, C.D. 190e Panoramic view of folded strata of Baltimore and Ohio Railroad, two miles west of Harper's Ferry, Virginia. 1892. #1:/Pennsylvania-Bulletin 134/wcd00192 ID. Walcott, C.D. 192 Synclinal fold in the thin-bedded Lower Cambrian Limestones, as seen in a quarry in the suburbs of York, York County, Pennsylvania. 1892. Plate 5 in US Geological Survey Bulletin 134. 1896. #1:/Pennsylvania-Bulletin 134/wcd00193 ID. Walcott, C.D. 193 Illustration of erosion by solution beneath the soil of a massive bed of Lower Cambrian Limestone, exposed in a limestone quarry on the east side of York, York County, Pennsylvania, within the city limits. 1892. Plate 4 in US Geological Survey Bulletin 134. 1896. #1:/Pennsylvania-Bulletin 134/wcd00194 ID. Walcott, C.D. 194 Exposure of limestone conglomerate in Lower Cambrian Limestone in quarry on east side of York, York County, Pennsylvania, within the city limits. 1893. Plate 11 in US Geological Survey Bulletin 134. 1896 #1:/Pennsylvania-Bulletin 134/wcd00195 ID. Walcott, C.D. 195 Old limekiln at Bellemonte, on the main line of the Pennsylvania Railroad. Lancaster County, Pennsylvania 1893. Plate 9 in US Geological Survey Bulletin 134. 1896 #1:/Pennsylvania-Bulletin 134/wcd0196a ID. Walcott, C.D. 196a Cliff of massive-bedded Lower Cambrian limestone, bluish-black at the base, white above and capped by thinner layers of a dark arenaceous limestone. Quarries on the line of the Pennsylvania Railroad at Bellemonte, Lancaster County Pennsylvania. 1893. Plate 6 in US Geological Survey Bulletin 134. 1896 #1:/Walcott Collection/wcd0197a ID. Walcott, C.D. 197a Lower Cambrian limestone, exposed in quarries at Bellemont Lancaster County, Pennsylvania, on the Pennsylvania Railroad a little east of photo #196. The massive limestones of photo #196 are here capped by a band of conglomerate limestone that rests on the thinbedded limestone shown in the top of the quarry of photo #196. Lancaster County. Pennsylvania. 1893. #1:/Pennsylvania-Bulletin 134/wcd0198a ID. Walcott, C.D. 198a Lower Cambrian limestone exposed in quarries at Bellemonte, on the line of the Pennsylvania Railroad, of Plate 6. The massive limestones are here capped by a band of limestone conglomerate that rests on the thin-bedded limestone shown in the top of quarry, Plate 6. Lancaster County, Pennsylvania 1893. Plate 7 in US Geological Survey Bulletin 134. 1896 #1:/Walcott Collection/wcd0199a ID. Walcott, C.D. 199a Quarry a little north of photos #197 and #198, near Bellemont Post Office. This quarry shows the brecciation, caused by jointing and cleavage planes, of the massive limestone shown in photo #196. Lancaster County. Pennsylvania. 1893. #1:/Pennsylvania-Bulletin 134/wcd0199b ID. Walcott, C.D. 199b Massive-bedded, light-gray, siliceous limestone, in quarries one-fourth mile north of Pennsylvania Railroad tracks, Bellemonte, The limestone breaks into angular fragments on the lines of the bedding and cleavage planes. Lancaster County, Pennsylvania. 1893. Plate 8 in US Geological Survey Bulletin 134. 1896 #1:/Walcott Collection/wcd0201a ID. Walcott, C.D. 201a Outline of crest of Sierra Nevada, west of Big Pine. From Tollgate Canyon, White Mountain range. Inyo County, California. 1894. #1:/Walcott Collection/wcd0202a ID. Walcott, C.D. 202a Sierra Nevadas from Alvord Station, two miles east of Big Pine. Inyo County, California. 1894. #1:/Walcott Collection/wcd00204 ID. Walcott, C.D. 204 Hill two miles west of Big Pine, showing outcrop of Paleozoic rocks, with eruptive rocks (granite) to the west. Right side. Inyo County, California. 1894. #1:/Walcott Collection/wcd0205a ID. Walcott, C.D. 205a Granite boulders resulting from the disintegration of massive granite, eastern slop of Sierra Nevadas, three miles west of Big Pine. Inyo County, California. 1894. #1:/Walcott Collection/wcd0205b ID. Walcott, C.D. 205b Granite boulders resulting from the disintegration of massive granite, eastern slop of Sierra Nevadas, three miles west of Big Pine. Inyo County, California. 1894. #1:/Walcott Collection/wcd0206a ID. Walcott, C.D. 206a Plicated layers of thin bedded chert in limestone etched by erosion, Lower Cambrian (?). Hill two miles west of Big Pine. Inyo County, California. 1894. #1:/Walcott Collection/wcd0206c ID. Walcott, C.D. 206c Plicated layers of thin bedded chert in limestone etched by erosion, Lower Cambrian (?). Hill two miles west of Big Pine. Inyo County, California. 1894. #1:/Walcott Collection/wcd0206d ID. Walcott, C.D. 206d Plicated layers of thin bedded chert in limestone etched by erosion, Lower Cambrian (?). Hill two miles west of Big Pine. Inyo County, California. 1894. #1:/Walcott Collection/wcd0207a ID. Walcott, C.D. 207a White Mountain range directly east of Alword Station and north of Toogate Canyon. Inyo County, California. 1894. #1:/Walcott Collection/wcd0207b ID. Walcott, C.D. 206b White Mountain range directly east of Alword Station and north of Toogate Canyon. Inyo County, California. 1894. #1:/Walcott Collection/wcd0208a ID. Walcott, C.D. 208a Panoramic view of White Mountain Range. From Foothills of Sierra Nevadas, looking across Owens Valley. Inyo County, California. 1894. #1:/Walcott Collection/wcd0208b ID. Walcott, C.D. 208b Panoramic view of White Mountain Range. From Foothills of Sierra Nevadas, looking across Owens Valley. Inyo County, California. 1894. #1:/Walcott Collection/wcd0208c ID. Walcott, C.D. 208c Panoramic view of White Mountain Range. From Foothills of Sierra Nevadas, looking across Owens Valley. Inyo County, California. 1894. #1:/Walcott Collection/wcd0208d ID. Walcott, C.D. 208d Panoramic view of White Mountain Range. From Foothills of Sierra Nevadas, looking across Owens Valley. Inyo County, California. 1894. #1:/Walcott Collection/wcd00209 ID. Walcott, C.D. 209 White Mountain Range. From Collins Ranch, seven miles north Alvord. Inyo County, California. 1894. #1:/Walcott Collection/wcd0211a ID. Walcott, C.D. 211a West limb of overturned synclinal, Silver Canyon, White Mountain Range. The dark portions are compressed shales in synclinal. Inyo County, California. 1894. #1:/Walcott Collection/wcd00213 ID. Walcott, C.D. 213 Overturned fold in Cambrian quartzites, north side of Silver Canyon, White Mountain Range. Inyo County, California. 1894. #1:/Walcott Collection/wcd00214 ID. Walcott, C.D. 214 Cliffs and debris slopes of Lower Cambrian quartzites, Soldier's Canyon, above Deep Spring Valley. White Mountain Range. Inyo County, California. 1894. #1:/Walcott Collection/wcd0215a ID. Walcott, C.D. 215a Cambrian quartzites showing vertical cleavage of the strata. Soldier's Canyon. Deep Spring Valley. White Mountain Range. Inyo County, California. 1894. #1:/Walcott Collection/wcd00216 ID. Walcott, C.D. 216 Nearer view of quartzite cliff on south side of Soldier's Canyon, above Deep Spring Valley. White Mountain Range. Inyo County, California. 1894. #1:/Walcott Collection/wcd00217 ID. Walcott, C.D. 217 Lower Cambrian quartzites showing vertical cleavage in massive layers, and interbedded thin layers without cleavage. Soldier's Canyon, above Deep Spring Valley. White Mountain Range. Inyo County, California. 1894. #1:/Walcott Collection/wcd0217d ID. Walcott, C.D. 217d Lower Cambrian quartzites showing vertical cleavage in massive layers, and interbedded thin layers without cleavage. Soldier's Canyon, above Deep Spring Valley. White Mountain Range. Inyo County, California. 1894. #1:/Walcott Collection/wcd0217e ID. Walcott, C.D. 217e Lower Cambrian quartzites showing vertical cleavage in massive layers, and interbedded thin layers without cleavage. Soldier's Canyon, above Deep Spring Valley. White Mountain Range. Inyo County, California. 1894. #1:/Walcott Collection/wcd00219 ID. Walcott, C.D. 219 View of Sierra Nevadas from east side of Owens Valley, opposite Bishop. Inyo County, California. 1894. #1:/Walcott Collection/wcd0220a ID. Walcott, C.D. 220a Hill on north side of Deep Spring Valley showing strongly marked cleavage in the granite. Inyo County, California. 1894. #1:/Walcott Collection/wcd00221 ID. Walcott, C.D. 221 West end of ridge of 220, giving a nearer view of the cleavage in the granite. Inyo County, California. 1894. #1:/Walcott Collection/wcd00223 ID. Walcott, C.D. 223 West end of ridge of 220, giving a nearer view of the cleavage in the granite. Inyo County, California. 1894. #1:/Walcott Collection/wcd0224c ID. Walcott, C.D. 224c View of the hills one mile southwest of Antelope Springs, Deep Spring Valley, showing synclinal in Cambrian limestones resting on quartzites. Inyo County, California. 1894. #1:/Walcott Collection/wcd0224e ID. Walcott, C.D. 224e View of the hills one mile southwest of Antelope Springs, Deep Spring Valley, showing synclinal in Cambrian limestones resting on quartzites. Inyo County, California. 1894. #1:/Walcott Collection/wcd0225a ID. Walcott, C.D. 225a View of Deep Spring Valley, showing folded Cambrian strata on northwestern side of valley, as seen from the west. Inyo County, California. 1895. #1:/Walcott Collection/wcd0225b ID. Walcott, C.D. 225b View of Deep Spring Valley, showing folded Cambrian strata on northwestern side of valley, as seen from the west. Inyo County, California. 1895. #1:/Walcott Collection/wcd0226d ID. Walcott, C.D. 226d View of grantitic mountain range on side of Deep Spring Valley. Inyo County, California. 1895. #1:/Walcott Collection/wcd0227a ID. Walcott, C.D. 227a Panoramic view of a section of the White Mountain Range, north of road passing from Big Pine to Deep Spring Valley. Inyo County, California. 1894. #1:/Walcott Collection/wcd0227b ID. Walcott, C.D. 227b Panoramic view of a section of the White Mountain Range, north of road passing from Big Pine to Deep Spring Valley. Inyo County, California. 1894. #1:/Walcott Collection/wcd0227c ID. Walcott, C.D. 227c Panoramic view of a section of the White Mountain Range, north of road passing from Big Pine to Deep Spring Valley. Inyo County, California. 1894. #1:/Walcott Collection/wcd0228b ID. Walcott, C.D. 228b Overlooking granite area on east slope of White Mountain Range, from near divide on road leading from Deep Spring Valley, to Fish Lake Valley. Nevada. Inyo County, California. 1894. #1:/Walcott Collection/wcd0229c ID. Walcott, C.D. 229c Fold is Cambrian quartzites, south side of Tollgate Canyon, two miles above Tollgate, White Mountain Range. Inyo County, California. 1894. #1:/Walcott Collection/wcd0231a ID. Walcott, C.D. 231a Limestone capping Lower Cambrian quartzite Tollgate Canyon, one mile east of Tollgate, White Mountain Range. Inyo County, California. 1894. #1:/Walcott Collection/wcd0232b ID. Walcott, C.D. 232b Mouth of Silver Canyon, White Mountain Range showing delta, Quaternary beds, and mountain of Cambrian limestone and quartzite. Inyo County, California. 1894. #1:/Walcott Collection/wcd00233 ID. Walcott, C.D. 233 General view of derricks and upper opening of roofing slate quarries at West Pawlet. Rutland County, Vermont. 1894. #1:/Walcott Collection/wcd0234a ID. Walcott, C.D. 234a Looking into working of roofing slate quarries at West Pawlet. Rutland County, Vermont. 1894. #1:/Walcott Collection/wcd0234b ID. Walcott, C.D. 234b Looking into working of roofing slate quarries at West Pawlet. Rutland County, Vermont. 1894. #1:/Walcott Collection/wcd00235 ID. Walcott, C.D. 235 View of end of roofing slate quarry West Pawlet. Rutland County, Vermont. 1894. #1:/Walcott Collection/wcd0236a ID. Walcott, C.D. 236a Folds in the roofing slate at Falls of the Nettowes, east of Granville. Washington County, New York. 1894. (same as photo #101, taken in 1890) #1:/Walcott Collection/wcd0236c ID. Walcott, C.D. 236c Folds in the roofing slate at Falls of the Nettowes, east of Granville. Washington County, New York. 1894. (same as photo #101, taken in 1890) #1:/Walcott Collection/wcd00238 ID. Walcott, C.D. 238 Squaw Gulch, in Cripple Creek hills. Teller County, Colorado. 1894. #1:/Walcott Collection/wcd0239b ID. Walcott, C.D. 239b Head of Squaw Gulch, in Cripple Creek hills, looking southwest. Teller County, Colorado. 1894. #1:/Walcott Collection/wcd0241a ID. Walcott, C.D. 241a View in forest near middle of Flathead River, near Essex station and Great Northern Railway. Flathead County, Montana. 1895. #1:/Walcott Collection/wcd0241b ID. Walcott, C.D. 241b View in forest near middle of Flathead River, near Essex station and Great Northern Railway. Flathead County, Montana. 1895. #1:/Walcott Collection/wcd0241c ID. Walcott, C.D. 241c View in forest near middle of Flathead River, near Essex station and Great Northern Railway. Flathead County, Montana. 1895. #1:/Walcott Collection/wcd0241d ID. Walcott, C.D. 241d View in forest near middle of Flathead River, near Essex station and Great Northern Railway. Flathead County, Montana. 1895. #1:/Walcott Collection/wcd00243 ID. Walcott, C.D. 243 Looking south on Nyack Creek, 15 miles northeast of Nyack Station and Great Northern Railway. Flathead County, Montana. 1895. #1:/Glacier National Park/wcd00244 ID. Walcott, C.D. 244 Glacier National Park, Montana. Razoredge Mountain. Looking north towards the Rocky Mountain divide, 15 miles north of Nyack Station, Great Northern Railway. 1895. #1:/Walcott Collection/wcd00245 ID. Walcott, C.D. 245 View about 18 miles north of Nyack Station and Great Northern Railway. Flathead County, Montana. 1895. #1:/Glacier National Park/wcd0246a ID. Walcott, C.D. 246a Glacier National Park, Montana. McClintock Peak. Summit of the divide at the head of Nyack Creek, about 25 miles north of Nyack Station, Great Northern Railway. The Cut Bank Trail passes over the lower portion on the right. 1895. #1:/Walcott Collection/wcd0247a ID. Walcott, C.D. 247a Cliffs on east side of Nyack Station and Great Northern Railway. About 18 miles north of Nyack. Flathead County, Montana. 1895. #1:/Walcott Collection/wcd0247b ID. Walcott, C.D. 247b Cliffs on east side of Nyack Station and Great Northern Railway. About 18 miles north of Nyack. Flathead County, Montana. 1895. #1:/Walcott Collection/wcd0247c ID. Walcott, C.D. 247c Cliffs on east side of Nyack Station and Great Northern Railway. About 18 miles north of Nyack. Flathead County, Montana. 1895. #1:/Walcott Collection/wcd0248a ID. Walcott, C.D. 248c Cliffs on west side of Nyack Station and Great Northern Railway. About 15 miles north of Nyack. Rocks are Castle Mountain group, Cambrian in age. Flathead County, Montana. 1895. #1:/Walcott Collection/wcd0249a ID. Walcott, C.D. 249a Cliffs on east side of Nyack Creek and Great Northern Railway. About 15 miles north of Nyack. Rocks are Castle Mountain group; Cambrian in age. Flathead County, Montana. 1895. #1:/Walcott Collection/wcd0249c ID. Walcott, C.D. 249c Cliffs on east side of Nyack Creek and Great Northern Railway. About 18 miles north of Nyack. Rocks are Castle Mountain group; Cambrian in age. Flathead County, Montana. 1895. #1:/Walcott Collection/wcd0250b ID. Walcott, C.D. 250b View from C.D. Walcott's tent, located at head of Nyack Creek, about 22 miles north of Nyack station and Great Northern Railway. Flathead County, Montana. Sept 20, 1895. #1:/Walcott Collection/wcd0251a ID. Walcott, C.D. 251a View of Missouri River bottom, south of Williston and Great Northern Railway. North Dakota. #1:/Walcott Collection/wcd0251b ID. Walcott, C.D. 251b View of Missouri River bottom, south of Williston and Great Northern Railway. North Dakota. #1:/Walcott Collection/wcd00252 ID. Walcott, C.D. 252 Quartzites on the Belt Mountain terrace, about 5 miles above Neihart. Cascade County, Montana. #1:/Walcott Collection/wcd0252b ID. Walcott, C.D. 252b Quartzites on the Belt Mountain terrace, about 5 miles above Neihart. Cascade County, Montana. #1:/Walcott Collection/wcd0253a ID. Walcott, C.D. 253a View of Wardner, North Idaho, from the Sullivan-Bunker Hill crusher. Shoshone County, Idaho. #1:/Walcott Collection/wcd0254a ID. Walcott, C.D. 254a Looking north from upper Bunker Hill mine opening, Wardner. Shoshone County, Idaho. #1:/Walcott Collection/wcd0254b ID. Walcott, C.D. 254b Looking north from upper Bunker Hill mine opening, Wardner. Shoshone County, Idaho. #1:/Walcott Collection/wcd0254c ID. Walcott, C.D. 254c Looking north from upper Bunker Hill mine opening, Wardner. Shoshone County, Idaho. #1:/Walcott Collection/wcd0255a ID. Walcott, C.D. 255a Upper opening of Bunker Hill Mine, Wardner. Shoshone County, Idaho. #1:/Walcott Collection/wcd0255b ID. Walcott, C.D. 255b Upper opening of Bunker Hill Mine, Wardner. Shoshone County, Idaho. #1:/Walcott Collection/wcd0255c ID. Walcott, C.D. 255c Upper opening of Bunker Hill Mine, Wardner. Shoshone County, Idaho. #1:/Walcott Collection/wcd00256 ID. Walcott, C.D. 256 View of hills south of Wardner. Shoshone County, Idaho. #1:/Walcott Collection/wcd0257b ID. Walcott, C.D. 257b View on the Coeur d'Alene River. North Idaho. #1:/Walcott Collection/wcd0257c ID. Walcott, C.D. 257c View on the Coeur d'Alene River. North Idaho. #1:/Walcott Collection/wcd0257d ID. Walcott, C.D. 257d View on the Coeur d'Alene River. North Idaho. #1:/Walcott Collection/wcd0257e ID. Walcott, C.D. 257e View on the Coeur d'Alene River. North Idaho. #1:/Walcott Collection/wcd0258a ID. Walcott, C.D. 258a Head of navigation on the Coeur d'Alene River. North Idaho. #1:/Walcott Collection/wcd0258b ID. Walcott, C.D. 258b Head of navigation on the Coeur d'Alene River. North Idaho. #1:/Walcott Collection/wcd0259a ID. Walcott, C.D. 259a Principal street in Burke, Coeur d'Alene district. North Idaho. #1:/Walcott Collection/wcd0260a ID. Walcott, C.D. 260a Sandy concretions from Fort Union beds, Fort Buford Indian Reservation. Williams County. Northwestern North Dakota. #1:/Walcott Collection/wcd0260b ID. Walcott, C.D. 260b Sandy concretions from Fort Union beds, Fort Buford Indian Reservation. Williams County. Northwestern North Dakota. #1:/Walcott Collection/wcd0261b ID. Walcott, C.D. 261b Looking west at sand dunes, five miles east of Watch Hill. Washington County. Rhode Island. #1:/Walcott Collection/wcd0262a ID. Walcott, C.D. 262a Seaward face of sand dune, five miles east of Watch Hill. Washington County. Rhode Island. #1:/Rhode Island-Images/wcd0263a ID. Walcott, C.D. 263a Vertical wind ripple marks on face of sand dune, with a slope of from 20 to 25 degrees towards the ocean. Washington County, Rhode Island. C. 1900. Left photograph on page 48, Images of the U.S. Geological Survey, 1879-1979. #1:/Walcott Collection/wcd0263b ID. Walcott, C.D. 263b Vertical wind ripple-marks on face of sand dune, with a slope of 20 to 25 degrees towards the ocean. Washington County. Rhode Island. #1:/Walcott Collection/wcd0263c ID. Walcott, C.D. 263c Vertical wind ripple-marks on face of sand dune, with a slope of 20 to 25 degrees towards the ocean. Washington County. Rhode Island. #1:/Walcott Collection/wcd0264a ID. Walcott, C.D. 264a Cross bedding in face of sand dunes, 4 3/4 miles east of Watch Hill. Washington County. Rhode Island. #1:/Walcott Collection/wcd0265a ID. Walcott, C.D. 265a Trails on fine silt at recession of tide in inlet west of Noyes Point. Washington County. Rhode Island. #1:/Walcott Collection/wcd0265c ID. Walcott, C.D. 265c Trails on fine silt at recession of tide in inlet west of Noyes Point. Washington County. Rhode Island. #1:/Walcott Collection/wcd0266a ID. Walcott, C.D. 266a Markings produced by movements of star fish, and rills on fine sand. Inlet west of Noyes Point. Washington County. Rhode Island. #1:/Walcott Collection/wcd00267 ID. Walcott, C.D. 267 Trail of Rock Crab on firm, wet sand. Beach at Noyes Point. Washington County. Rhode Island. #1:/Walcott Collection/wcd0268a ID. Walcott, C.D. 268a Trails of Rock Crabs on fine silt and sand at recession of tide. Inlet west of Noyes Point. Washington County. Rhode Island. #1:/Walcott Collection/wcd0268b ID. Walcott, C.D. 268b Trails of Rock Crabs on fine silt and sand at recession of tide. Inlet west of Noyes Point. Washington County. Rhode Island. #1:/Walcott Collection/wcd0268d ID. Walcott, C.D. 268d Trails of Rock Crabs on fine silt and sand at recession of tide. Inlet west of Noyes Point. Washington County. Rhode Island. #1:/Walcott Collection/wcd0269a ID. Walcott, C.D. 269a Bird tracks, trails, etc., in fine silt and sand at recession of tide. Inlet west of Noyes Point. Washington County. Rhode Island. #1:/Walcott Collection/wcd0269b ID. Walcott, C.D. 269b Bird tracks, trails, etc., in fine silt and sand at recession of tide. Inlet west of Noyes Point. Washington County. Rhode Island. #1:/Walcott Collection/wcd0270a ID. Walcott, C.D. 270a Markings produced by drifting sea weed (like Eophyton) on fine silt and sand. Inlet west of Noyes Point. Washington County. Rhode Island. #1:/Walcott Collection/wcd0270c ID. Walcott, C.D. 270c Markings produced by drifting sea weed (like Eophyton) on fine silt and sand. Inlet west of Noyes Point. Washington County. Rhode Island. #1:/Walcott Collection/wcd0271a ID. Walcott, C.D. 271a Rill marks on beach west of Noyes Point. Washington County. Rhode Island. #1:/Walcott Collection/wcd0271c ID. Walcott, C.D. 271c Rill marks on beach west of Noyes Point. Washington County. Rhode Island. #1:/Walcott Collection/wcd0271d ID. Walcott, C.D. 271d Rill marks on beach west of Noyes Point. Washington County. Rhode Island. #1:/Walcott Collection/wcd0271e ID. Walcott, C.D. 271e Rill marks on beach west of Noyes Point. Washington County. Rhode Island. #1:/Walcott Collection/wcd0272b ID. Walcott, C.D. 272b Pitting produced by heavy rain on sea beach, partially effeaced by incoming tide. Noyes Point. Washington County. Rhode Island. #1:/Walcott Collection/wcd00273 ID. Walcott, C.D. 273 Annelid boring with trails of annelid radiating from it and pitting produced by bubbles of gas in soft silt. Inlet west of Noyes Beach. Washington County. Rhode Island. #1:/Walcott Collection/wcd0274b ID. Walcott, C.D. 274b Rill marks from small pebbles, on beach at Noyes Point. Washington County. Rhode Island. #1:/Walcott Collection/wcd00275 ID. Walcott, C.D. 275 Irregular surface of sandy bottom, produced by cutflowing tide, at inlet west of Noyes Point. Washington County. Rhode Island. #1:/Rhode Island- Bulletin 134/wcd0276a ID. Walcott, C.D. 276a Brecciated layer of fine sand and silt produced by inflowing tide breaking up the layer hardened by sun and wind on tidal flat in inlet west of Noyes Point, Washington County, Rhode Island. 1892. Plate 15B in US Geological Survey Bulletin 134. 1896 #1:/Rhode Island-Bulletin 134/wcd0276c ID. Walcott, C.D. 276c Brecciated layer of fine sand and silt produced by inflowing tide breaking up the layer hardened by sun and wind on tidal flat in inlet west of Noyes Point, Washington County, Rhode Island. 1892. Plate 15A in US Geological Survey Bulletin 134. 1896 #1:/Walcott Collection/wcd0277d ID. Walcott, C.D. 277d Surface of beach of fine sand at low tide. Inlet west of Noyes Point. Washington County. Rhode Island. #1:/Walcott Collection/wcd00278 ID. Walcott, C.D. 278 View of Oyster bed at low tide, 5 miles below Brunswick. Glynn County. Georgia. 1895. #1:/Walcott Collection/wcd0278a ID. Walcott, C.D. 278a View of Oyster bed at low tide, 5 miles below Brunswick. Glynn County. Georgia. 1895. #1:/Walcott Collection/wcd00279 ID. Walcott, C.D. 279 Trail of young Limulus on sand flats of Tampa Bay, near Tampa Inn. Hillsboro County. Florida. 1895. #1:/Walcott Collection/wcd0279a ID. Walcott, C.D. 279a Trail of young Limulus on sand flats of Tampa Bay, near Tampa Inn. Hillsboro County. Florida. 1895. #1:/Walcott Collection/wcd0279b ID. Walcott, C.D. 279b Trail of young Limulus on sand flats of Tampa Bay, near Tampa Inn. Hillsboro County. Florida. 1895. #1:/Walcott Collection/wcd0280a ID. Walcott, C.D. 280a Interformational conglomerate, Upper Cambrian, below Highgate Falls. Franklin County. Vermont. 1896. #1:/Walcott Collection/wcd0280b ID. Walcott, C.D. 280b Interformational conglomerate, Upper Cambrian, below Highgate Falls. Franklin County. Vermont. 1896. #1:/Walcott Collection/wcd0280c ID. Walcott, C.D. 280c Interformational conglomerate, Upper Cambrian, below Highgate Falls. Franklin County. Vermont. 1896. #1:/Walcott Collection/wcd0281b ID. Walcott, C.D. 281b Quartz veins in calcareous sandstone, Upper Cambrian, three miles east of Swanton. Franklin County. Vermont. 1896. #1:/Walcott Collection/wcd0281c ID. Walcott, C.D. 281c Quartz veins in calcareous sandstone, Upper Cambrian, three miles east of Swanton. Franklin County. Vermont. 1896. #1:/Walcott Collection/wcd0282c ID. Walcott, C.D. 282c Brecciated eruptive rock in crystalline limestone, west of Port Henry. Essix County. New York. 1896. #1:/Walcott Collection/wcd0283b ID. Walcott, C.D. 283b Colborn Furnace, northwest of Port Henry. Erected July 12, 1848. Essix County. New York. 1896. #1:/Walcott Collection/wcd0283c ID. Walcott, C.D. 283c Colborn Furnace, northwest of Port Henry. Erected July 12, 1848. Essix County. New York. 1896. #1:/Walcott Collection/wcd0283d ID. Walcott, C.D. 283d Colborn Furnace, northwest of Port Henry. Erected July 12, 1848. Essix County. New York. 1896. #1:/Walcott Collection/wcd0284b ID. Walcott, C.D. 284b Winooski Marble. Two miles east of Swanton. Barney Marble Company's quarry. Franklin County, Vermont. 1896. #1:/Walcott Collection/wcd0284c ID. Walcott, C.D. 284c Winooski Marble. Two miles east of Swanton. Barney Marble Company's quarry. Franklin County, Vermont. 1896. #1:/Walcott Collection/wcd0284d ID. Walcott, C.D. 284d Winooski Marble. Two miles east of Swanton. Barney Marble Company's quarry. Franklin County, Vermont. 1896. #1:/Walcott Collection/wcd0284e ID. Walcott, C.D. 284e Winooski Marble. Two miles east of Swanton. Barney Marble Company's quarry. Franklin County, Vermont. 1896. #1:/Walcott Collection/wcd0284f ID. Walcott, C.D. 284f Winooski Marble. Two miles east of Swanton. Barney Marble Company's quarry. Franklin County, Vermont. 1896. #1:/Walcott Collection/wcd0284g ID. Walcott, C.D. 284g Winooski Marble. Two miles east of Swanton. Barney Marble Company's quarry. Franklin County, Vermont. 1896. #1:/Walcott Collection/wcd0285a ID. Walcott, C.D. 285a Overthrust of Lower Cambrian limestone (Red sandrock) on Utica-Trenton shales. Hopkins Point, northwest of Burlington. Chittenden County. Vermont. 1896. #1:/Walcott Collection/wcd0285e ID. Walcott, C.D. 285e Overthrust of Lower Cambrian limestone (Red sandrock) on Utica-Trenton shales. Hopkins Point, northwest of Burlington. Chittenden County. Vermont. 1896. #1:/Walcott Collection/wcd0285f ID. Walcott, C.D. 285f Overthrust of Lower Cambrian limestone (Red sandrock) on Utica-Trenton shales. Hopkins Point, northwest of Burlington. Chittenden County. Vermont. 1896. #1:/Walcott Collection/wcd0285h ID. Walcott, C.D. 285h Overthrust of Lower Cambrian limestone (Red sandrock) on Utica-Trenton shales. Hopkins Point, northwest of Burlington. Chittenden County. Vermont. 1896. #1:/Walcott Collection/wcd0286b ID. Walcott, C.D. 286b Cleavage in Utica-Trenton shales located at Appletree Point, northwest of Burlington. Chittenden County. Vermont. 1896. #1:/Walcott Collection/wcd0286d ID. Walcott, C.D. 286d Cleavage in Utica-Trenton shales located at Appletree Point, northwest of Burlington. Chittenden County. Vermont. 1896. #1:/Walcott Collection/wcd00287 ID. Walcott, C.D. 287 Barney Marble Co. Quarry of "Winooski Marble", two miles east of Swanton. Franklin County. Vermont. 1896. #1:/Walcott Collection/wcd00288 ID. Walcott, C.D. 288 Camp at Pipers Ranch, Oasis. Inyo County, California. 1896. #1:/Walcott Collection/wcd0289b ID. Walcott, C.D. 289b Corrugated, banded limestone in canyon of Mineral Ridge. One mile north of mill at Silver Peak. Esmeralda County, Nevada. 1896. #1:/Walcott Collection/wcd0289d ID. Walcott, C.D. 289d Corrugated, banded limestone in canyon of Mineral Ridge. One mile north of mill at Silver Peak. Esmeralda County, Nevada. 1896. #1:/Nevada-Images/wcd00290 ID. Walcott, C.D. 290 Clayton Valley Salt Flat, from Mineral ridge, near Silver Peak, Esmeralda County, Nevada. 1896. Page 6 photograph, , Images of the U.S. Geological Survey, 1879-1979. #1:/Walcott Collection/wcd00291 ID. Walcott, C.D. 291 Alcatros Island, from Silver Peak. Silver Peak Quadrangle. Esmeralda County, Nevada. 1896. #1:/Walcott Collection/wcd0291a ID. Walcott, C.D. 291a Alcatros Island, from Silver Peak. Silver Peak Quadrangle. Esmeralda County, Nevada. 1896. #1:/Walcott Collection/wcd00293 ID. Walcott, C.D. 293 East face of Silver Peak and Red Mountain Range. Panoramic view. Esmeralda County, Nevada. 1896. #1:/Walcott Collection/wcd0293a ID. Walcott, C.D. 293a East face of Silver Peak and Red Mountain Range. Panoramic view. Esmeralda County, Nevada. 1896. #1:/Walcott Collection/wcd0293b ID. Walcott, C.D. 293b East face of Silver Peak and Red Mountain Range. Panoramic view. Esmeralda County, Nevada. 1896. #1:/Walcott Collection/wcd00294 ID. Walcott, C.D. 294 Red Mountain and Silver Peak Range looking from the north. Panoramic view. Esmeralda County, Nevada. 1896. #1:/Walcott Collection/wcd0294a ID. Walcott, C.D. 294a Red Mountain and Silver Peak Range looking from the north. Panoramic view. Esmeralda County, Nevada. 1896. #1:/Walcott Collection/wcd00295 ID. Walcott, C.D. 295 East slope of White Mountain Range from McAfee's Ranch. Panoramic view. Esmeralda County, Nevada. 1896. #1:/Walcott Collection/wcd0295a ID. Walcott, C.D. 295a East slope of White Mountain Range from McAfee's Ranch. Panoramic view. Esmeralda County, Nevada. 1896. #1:/Walcott Collection/wcd0297a ID. Walcott, C.D. 297a Canyons at head of northwestern arm of Death Valley, east side, six miles west of Mt. Magruder. Esmeralda County, Nevada. 1896. #1:/Walcott Collection/wcd0297b ID. Walcott, C.D. 297b Canyons at head of northwestern arm of Death Valley, east side, six miles west of Mt. Magruder. Esmeralda County, Nevada. 1896. #1:/Walcott Collection/wcd00299 ID. Walcott, C.D. 299 View of White Mountain Range from Payson Ranch located at Deep Spring Valley. Inyo County. California. 1896. #1:/Walcott Collection/wcd00300 ID. Walcott, C.D. 300 Lake beds, Waucoba Canyon, Inyo Range, five miles above Owens Valley. Inyo County. California. 1896. #1:/Walcott Collection/wcd00301 ID. Walcott, C.D. 301 Boulders in quaternary of Silver Peak Canyon, west side Silver Peak Range. Esmeralda County, Nevada. 1896. #1:/Walcott Collection/wcd00302 ID. Walcott, C.D. 302 Cliffs of volcanic breccia, Cave Spring, Silver Peak Canyon. Esmeralda County, Nevada. 1896. #1:/Walcott Collection/wcd0304a ID. Walcott, C.D. 304a View of the Inyo Range west of Eclipse Mill, Owens Valley. Inyo County. California. 1896. #1:/Walcott Collection/wcd0304b ID. Walcott, C.D. 304b View of the Inyo Range west of Eclipse Mill, Owens Valley. Inyo County. California. 1896. #1:/Walcott Collection/wcd0304c ID. Walcott, C.D. 304c View of the Inyo Range west of Eclipse Mill, Owens Valley. Inyo County. California. 1896. #1:/Walcott Collection/wcd0304d ID. Walcott, C.D. 304d View of the Inyo Range west of Eclipse Mill, Owens Valley. Inyo County. California. 1896. #1:/Walcott Collection/wcd0304e ID. Walcott, C.D. 304e View of the Inyo Range west of Eclipse Mill, Owens Valley. Inyo County. California. 1896. #1:/Walcott Collection/wcd304aa ID. Walcott, C.D. 304aa North face of Red Mountain, Silver Peak Range. Panoramic view showing red volcanic breccia sloping eastward. Esmeralda County, Nevada. 1896. #1:/Walcott Collection/wcd304bb ID. Walcott, C.D. 304bb North face of Red Mountain, Silver Peak Range. Panoramic view showing red volcanic breccia sloping eastward. Esmeralda County, Nevada. 1896. #1:/Walcott Collection/wcd304cc ID. Walcott, C.D. 304cc North face of Red Mountain, Silver Peak Range. Panoramic view showing red volcanic breccia sloping eastward. Esmeralda County, Nevada. 1896. #1:/Walcott Collection/wcd00305 ID. Walcott, C.D. 305 View of Red Mountain and Silver Peak Range from the northwest. Esmeralda County, Nevada. 1896. #1:/Walcott Collection/wcd00306 ID. Walcott, C.D. 306 Gold mines east slope of Mineral Ridge, seven miles north of Silver Peak mill. Esmeralda County, Nevada. 1896. #1:/Walcott Collection/wcd0307b ID. Walcott, C.D. 307b Looking out towards Clayton Valley from Mineral Ridge, 7 miles north of Silver Peak Mill. Esmeralda County, Nevada. 1896. #1:/Walcott Collection/wcd0308a ID. Walcott, C.D. 308a View of bedded volcanic breccia on west slop of Silver Peak Range. Taken from Silver Peak Canyon, west of summit, looking west. Esmeralda County, Nevada. 1896. #1:/Walcott Collection/wcd0308c ID. Walcott, C.D. 308c View of bedded volcanic breccia on west slop of Silver Peak Range. Taken from Silver Peak Canyon, west of summit, looking west. Esmeralda County, Nevada. 1896. #1:/Walcott Collection/wcd0309a ID. Walcott, C.D. 309a Panoramic view of the eastward-facing cliff overlooking Columbus coal field. 12 miles south of Columbus. The cliff is formed of dark eruptives that rest on the shales and sandstones of the coal bearing rocks. Esmeralda County, Nevada. 1896. #1:/Walcott Collection/wcd0309b ID. Walcott, C.D. 309b Panoramic view of the eastward-facing cliff overlooking Columbus coal field. 12 miles south of Columbus. The cliff is formed of dark eruptives that rest on the shales and sandstones of the coal bearing rocks. Esmeralda County, Nevada. 1896. #1:/Walcott Collection/wcd0309c ID. Walcott, C.D. 309c Panoramic view of the eastward-facing cliff overlooking Columbus coal field. 12 miles south of Columbus. The cliff is formed of dark eruptives that rest on the shales and sandstones of the coal bearing rocks. Esmeralda County, Nevada. 1896. #1:/Walcott Collection/wcd0310a ID. Walcott, C.D. 310a Panoramic view looking northeast of strata above the coal beds, Columbus coal field, 12 miles south of Columbus. Esmeralda County, Nevada. 1896. #1:/Walcott Collection/wcd0310b ID. Walcott, C.D. 310b Panoramic view looking northeast of strata above the coal beds, Columbus coal field, 12 miles south of Columbus. Esmeralda County, Nevada. 1896. #1:/Walcott Collection/wcd0310c ID. Walcott, C.D. 310c Panoramic view looking northeast of strata above the coal beds, Columbus coal field, 12 miles south of Columbus. Esmeralda County, Nevada. 1896. #1:/Walcott Collection/wcd0312a ID. Walcott, C.D. 312a Shales capped by massive sandstone, interior portion Columbus coal field, near lava beds, Columbus. Esmeralda County, Nevada. 1896. #1:/Walcott Collection/wcd0312b ID. Walcott, C.D. 312b Shales capped by massive sandstone, interior portion Columbus coal field, near lava beds, Columbus. Esmeralda County, Nevada. 1896. #1:/Walcott Collection/wcd0313b ID. Walcott, C.D. 313b Opening of bituminous coal bed. William Groszenger, the discoverer of the field. He is standing by the Columbus coal field, Columbus. Esmeralda County, Nevada. 1896. #1:/Walcott Collection/wcd00314 ID. Walcott, C.D. 314 Corrugations in sandstones and shales, western side of Columbus coal field, near lava beds. Columbus. Esmeralda County, Nevada. 1896. #1:/Walcott Collection/wcd0315a ID. Walcott, C.D. 315a Wind rippled sand, Columbia coal field. Esmeralda County, Nevada. 1896. #1:/Walcott Collection/wcd0315b ID. Walcott, C.D. 315b Wind rippled sand, Columbia coal field. Esmeralda County, Nevada. 1896. #1:/Walcott Collection/wcd00317 ID. Walcott, C.D. 317 Fractured Cambrian limestone, Payson Canyon, Deep Spring Valley. Inyo County. California. 1896. #1:/Walcott Collection/wcd00318 ID. Walcott, C.D. 318 Payson's Ranch, Antelope Springs, Deep Spring Valley. Inyo County. California. 1896. #1:/Walcott Collection/wcd00319 ID. Walcott, C.D. 319 Nooning on the west side of desert, foot of Silver Peak range. Esmeralda County, Nevada. 1896. #1:/Walcott Collection/wcd00320 ID. Walcott, C.D. 320 Southeast end of Franklin Range, near El Paso, Texas. El Paso County. Texas. 1896. #1:/Walcott Collection/wcd0320a ID. Walcott, C.D. 320a Southeast end of Franklin Range, near El Paso, Texas. El Paso County. Texas. 1896. #1:/Walcott Collection/wcd00321 ID. Walcott, C.D. 321 South end of Franklin Range, near El Paso, Texas. El Paso County. Texas. 1896. #1:/Walcott Collection/wcd00322 ID. Walcott, C.D. 322 Franklin Peak and Range. Seven miles north of El Paso, Texas. El Paso County. Texas. 1896. #1:/Walcott Collection/wcd00323 ID. Walcott, C.D. 323 Panoramic view of sthe Sierra Nevada from camp near Eclipse Mill, Owens Valley. Inyo County. California. 1896. #1:/Walcott Collection/wcd0323b ID. Walcott, C.D. 323b Panoramic view of the Sierra Nevada from camp near Eclipse Mill, Owens Valley. Inyo County. California. 1896. #1:/Walcott Collection/wcd0323c ID. Walcott, C.D. 323c Panoramic view of the Sierra Nevada from camp near Eclipse Mill, Owens Valley. Inyo County. California. 1896. #1:/Walcott Collection/wcd00324 ID. Walcott, C.D. 324 Burrows with small balls of sand lying about, brought out of the holes by the fiddler crabs. Armstrongs Point, opposite Hampton School. York County. Virginia. March 1897. #1:/Walcott Collection/wcd00325 ID. Walcott, C.D. 325 Small pits on the sand and silt of receding tide. Armstrongs Point, opposite Hampton School. York County. Virginia. March 1897. #1:/Walcott Collection/wcd00326 ID. Walcott, C.D. 326 Trails made by small gastropod. Armstrongs Point, opposite Hampton School. York County. Virginia. March 1897. #1:/Walcott Collection/wcd0326b ID. Walcott, C.D. 326b Trails made by small gastropod. Armstrongs Point, opposite Hampton School. York County. Virginia. March 1897. #1:/Walcott Collection/wcd0326c ID. Walcott, C.D. 326c Trails made by small gastropod. Armstrongs Point, opposite Hampton School. York County. Virginia. March 1897. #1:/Walcott Collection/wcd00327 ID. Walcott, C.D. 327 Trails made by small annelid on the surface of sandy silt shortly after the water is withdrawn by the tide. Armstrongs Point, opposite Hampton School. York County. Virginia. March 1897. #1:/Walcott Collection/wcd0327c ID. Walcott, C.D. 327c Trails made by small annelid on the surface of sandy silt shortly after the water is withdrawn by the tide. Armstrongs Point, opposite Hampton School. York County. Virginia. March 1897. #1:/Walcott Collection/wcd0327e ID. Walcott, C.D. 327e Trails made by small annelid on the surface of sandy silt shortly after the water is withdrawn by the tide. Armstrongs Point, opposite Hampton School. York County. Virginia. March 1897. #1:/Walcott Collection/wcd0327g ID. Walcott, C.D. 327g Trails made by small annelid on the surface of sandy silt shortly after the water is withdrawn by the tide. Armstrongs Point, opposite Hampton School. York County. Virginia. March 1897. #1:/Chesapeake and Ohio Canal National Historic Park/wcd0328a ID. Walcott, C.D. 328a Chesapeake and Ohio Canal National Historic Park, Maryland, Virginia, West Virginia. Anticlinal fold in sandstones and shales near the base of the Upper Silurian, 3 miles west of Hancock. View is from the south side of the canal. May 1897. See also photo wcd0328b. #1:/Chesapeake and Ohio Canal National Historic Park/wcd0328b ID. Walcott, C.D. 328b Chesapeake and Ohio Canal National Historic Park, Maryland, Virginia, West Virginia. Anticlinal fold in sandstones and shales near the base of the Upper Silurian, 3 miles west of Hancock. View is from the south side of the canal. View is more perpendicular than that of photo wcs0328a. May 1897. #1:/Chesapeake and Ohio Canal National Historic Park/wcd0328c ID. Walcott, C.D. 328c Chesapeake and Ohio Canal National Historic Park, Maryland, Virginia, West Virginia. Portion of anticlinal arch of fold in sandstones and shales, near the base of the Upper Silurian, 3 miles west of Hancock. Robert Bridges is standing in the arch. May 1897. #1:/Walcott Collection/wcd0328d ID. Walcott, C.D. 328d Inner portion of anticlinal arch of fold in sandstones and shales, near base of Upper Silurian. C.& O. Canal, 3 miles west of Hancock. Robert Bridges standing in arch. Washington County. Maryland. May 1897. #1:/Chesapeake and Ohio Canal National Historic Park/wcd0328e ID. Walcott, C.D. 328e Chesapeake and Ohio Canal National Historic Park, Maryland, Virginia, West Virginia. Portion of anticlinal arch of fold in sandstones and shales, near the base of the Upper Silurian, 3 miles west of Hancock. Boatman is seated on the crest of the arch. May 1897. #1:/Walcott Collection/wcd00329 ID. Walcott, C.D. 329 Portion of west limb of anticlinal arch in sandstones and shales, near base of Upper Silurian. C.& O. Canal, 3 miles west of Hancock. Washington County. Maryland. May 1897. #1:/Maryland-Bulletin 319/wcd0330a ID. Walcott, C.D. 330a Artesian reservoirs, torsion cracks due to folding. Synclinal fold in sandstone and shales in Upper Silurian; Chesapeake and Ohio Canal, 3 miles west of Hancock; C. Willard Hayes for scale. Washington County, Maryland. May 1897. Plate 3 in U.S. Geological Survey. Bulletin 319. 1908. Plate 22-B in U.S. Geological Survey. Water-supply paper 489. 1923. #1:/Chesapeake and Ohio Canal National Historic Park/wcd0330b ID. Walcott, C.D. 330b Chesapeake and Ohio Canal National Historic Park, Maryland, Virginia, West Virginia. Section of synclinal fold in sandstone and shales near the base of the Upper Silurian. C. Willard Hayes is seated on syncline. May 1897. #1:/Walcott Collection/wcd0331a ID. Walcott, C.D. 331 Broken portion of overthrust anticlinal fold with synclinal fold on right. Folds in Silurian shaly and bedded limestones, west of limekilns, on north bank of C. & O. Canal. Three miles west of Hancock. C.R. Van Hise sitting on crest of syncline. Washington County. Maryland. May 1897. #1:/Walcott Collection/wcd00332 ID. Walcott, C.D. 332 Synclinal fold in shale limestones, opposite cement mill. Bank of C. & O. Canal, three miles west of Hancock. Washington County. Maryland. May 1897. #1:/Walcott Collection/wcd00333 ID. Walcott, C.D. 333 Looking along crest of anticline where "cement" limestone has been removed. North bank of C. & O. Canal, near limekilns. Three miles west of Hancock. Washington County. Maryland. May 1897. #1:/Walcott Collection/wcd00334 ID. Walcott, C.D. 334 Looking up at roof of anticline shown in Photo #333. On left of the striated surface of the roof is shown and on right, the rhomboidal surface. North bank of C. & O. Canal, near limekilns. Three miles west of Hancock. Washington County. Maryland. May 1897. #1:/Walcott Collection/wcd00335 ID. Walcott, C.D. 335 Broken rhomboidal surface on right side of crest of arch shown in Photo #333. North bank of C. & O. Canal, near limekilns. Three miles west of Hancock. Washington County. Maryland. May 1897. #1:/Walcott Collection/wcd00336 ID. Walcott, C.D. 336 Exterior view of anticlinal arch shown in Photo #333 and 333a. North bank of C. & O. Canal, near limekilns. Three miles west of Hancock. C. Willard Hayes in foreground. Washington County. Maryland. May 1897. #1:/Walcott Collection/wcd00337 ID. Walcott, C.D. 337 Seaweed left on the beach after a storm. Eastern Point, at mouth of Thames River, near New London, Connecticut. New London County. Connecticut. July 1897. #1:/Walcott Collection/wcd0337a ID. Walcott, C.D. 337a Seaweed left on the beach after a storm. Eastern Point, at mouth of Thames River, near New London, Connecticut. New London County. Connecticut. July 1897. #1:/Walcott Collection/wcd00338 ID. Walcott, C.D. 338 Contorted gneisses at Stoll Quarry, Groton. New London County. Connecticut. July 1897. #1:/Walcott Collection/wcd0339a ID. Walcott, C.D. 339a Contorted gneisses above massive dike of biotitic granite. Stoll Quarry, Groton. New London County. Connecticut. July 1897. #1:/Walcott Collection/wcd00340 ID. Walcott, C.D. 340 Contorted gneisses above massive dike of biotitic granite. Stoll Quarry, Groton. (Nearer view of Photo #339). New London County. Connecticut. July 1897. #1:/Walcott Collection/wcd0340a ID. Walcott, C.D. 340a Contorted gneisses above massive dike of biotitic granite. Stoll Quarry, Groton. (Nearer view of Photo #339). New London County. Connecticut. July 1897. #1:/Walcott Collection/wcd0340b ID. Walcott, C.D. 340b Contorted gneisses above massive dike of biotitic granite. Stoll Quarry, Groton. (Nearer view of Photo #339). New London County. Connecticut. July 1897. #1:/Walcott Collection/wcd0340c ID. Walcott, C.D. 340c Contorted gneisses above massive dike of biotitic granite. Stoll Quarry, Groton. (Nearer view of Photo #339). New London County. Connecticut. July 1897. #1:/Yellowstone National Park/wcd0342a ID. Walcott, C.D. 342a Yellowstone National Park, Wyoming. Yellowstone Falls. August 1897. #1:/Yellowstone National Park/wcd00343 ID. Walcott, C.D. 343 Yellowstone National Park, Wyoming. Looking across gorge of the Yellowstone, 12 miles below Falls, showing forest and the plain cut through by the Yellowstone. August 1897. #1:/Yellowstone National Park/wcd00344 ID. Walcott, C.D. 344 Yellowstone National Park, Wyoming. Basalt flows, looking across the Yellowstone River about 5 miles above Yanceys. August 1897. #1:/Yosemite National Park/wcd00345 ID. Walcott, C.D. 345a Yosemite National Park, California. Summit of Conness Peak, on Sierra divide. U.S. Coast & Geodetic Survey Station. California. September 1897. #1:/Yosemite National Park/wcd00346 ID. Walcott, C.D. 346 Yosemite National Park, California. Glacial lakes seen from the summit of Conness Peak, looking east. California. September 1897. #1:/Yosemite National Park/wcd00347 ID. Walcott, C.D. 347 Yosemite National Park, California. Snow drifts on northwest slop of Conness Peak, looking down from summit of peak. California. September 1897. #1:/Yosemite National Park/wcd00348 ID. Walcott, C.D. 348 Yosemite National Park, California. View looking west from Conness Peak. California. September 1897. #1:/Yosemite National Park/wcd00349 ID. Walcott, C.D. 349 Yosemite National Park, California. Granite point near trail and glacial lake on Conness Peak Trail. California. September 1897. #1:/Yosemite National Park/wcd00350 ID. Walcott, C.D. 350 Yosemite National Park, California. Granite showing effect of cleavage fractures in producing forms of erosion, Conness Peak Trail. California. September 1897. #1:/Yosemite National Park/wcd00351 ID. Walcott, C.D. 351 Yosemite National Park, California. Unicorn and other points, looking across Tuolumne meadows. California. September 1897. #1:/Yosemite National Park/wcd0351a ID. Walcott, C.D. 351a Yosemite National Park, California. Unicorn and other points, looking across Tuolumne meadows. California. September 1897. #1:/Yosemite National Park/wcd0351b ID. Walcott, C.D. 351b Yosemite National Park, California. Unicorn and other points, looking across Tuolumne meadows. California. September 1897. #1:/Yosemite National Park/wcd0351c ID. Walcott, C.D. 351c Yosemite National Park, California. Unicorn and other points, looking across Tuolumne meadows. California. September 1897. #1:/Yosemite National Park/wcd00352 ID. Walcott, C.D. 352 Yosemite National Park, California. Looking southwest across lake just east of summit of Mono Pass, Sierra Nevada Mountains. Mono County, California. September 1897. #1:/Yosemite National Park/wcd00353 ID. Walcott, C.D. 353 Yosemite National Park, California. Glacial lake east slope of Mono Pass, Sierra Nevada Mountains, looking towards outlet. Mono County, California. September 1897. #1:/Yosemite National Park/wcd00355 ID. Walcott, C.D. 355 Yosemite National Park, California. Mono Pass from near mouth of canyon below Walker Lake. Sierra Nevada Mountains. Mono County, California. September 1897. #1:/Yosemite National Park/wcd00356 ID. Walcott, C.D. 356 Yosemite National Park, California. Quartzites near summit on Mono Pass, Sierra Nevada Mountains. Mono County, California. September 1897. #1:/Yosemite National Park/wcd00357 ID. Walcott, C.D. 357 Yosemite National Park, California. Quartz porphyry, southeast and below Mono Pass. Sierra Nevada Mountains. Mono County, California. September 1897. #1:/Yosemite National Park/wcd00358 ID. Walcott, C.D. 358 Yosemite National Park, California. Effect of fire on the base of a large pine tree near Tioga Road. C.D. Walcott is standing on the stump of a fallen tree. Mono County, California. September 1897. #1:/Yosemite National Park/wcd0358a ID. Walcott, C.D. 358a Yosemite National Park, California. Effect of fire on the base of a large pine tree near Tioga Road.C.D. Walcott is standing on the stump of a fallen tree. September 1897. #1:/Yosemite National Park/wcd0358b ID. Walcott, C.D. 358b Yosemite National Park, California. Effect of fire on the base of large pine trees near Tioga Road. Capt. Alex Rogers, Park Superintendent, stands beside a burned tree. September 1897. #1:/Yosemite National Park/wcd00359 ID. Walcott, C.D. 359 Yosemite National Park, California. Capt. Alex Rogers, Park Superintendent, on horseback in the forest near Tioga road. September 1897. Plate 118-B, U.S. Geological Survey Annual Report 21 (1899-1900), Part 5. #1:/Yosemite National Park/wcd0360b ID. Walcott, C.D. 360b Yosemite National Park, California. Suspended block of granite, Glacial Point. Mono County, California. September 1897. #1:/Yosemite National Park/wcd0360c ID. Walcott, C.D. 360c Yosemite National Park, California. Suspended block of granite, Glacial Point. Mono County, California. September 1897. #1:/Yosemite National Park/wcd00361 ID. Walcott, C.D. 361 Yosemite National Park, California. Stress cracks in granite, in wall below falls. Mono County, California. September 1897. #1:/Yosemite National Park/wcd00362 ID. Walcott, C.D. 362 Yosemite National Park, California. Cleavage plain in granite, wall below falls. Mono County, California. September 1897. #1:/Yosemite National Park/wcd00363 ID. Walcott, C.D. 363 Yosemite National Park, California. The dome above Nevada Falls. Mono County, California. September 1897. #1:/Yosemite National Park/wcd00364 ID. Walcott, C.D. 364 Yosemite National Park, California. Domes above Nevada Falls. Mariposa County, California. September 1897. #1:/Yosemite National Park/wcd0364a ID. Walcott, C.D. 364a Yosemite National Park, California. Domes above Nevada Falls. Mariposa County, California. September 1897. #1:/Yosemite National Park/wcd0364b ID. Walcott, C.D. 364b Yosemite National Park, California. Domes above Nevada Falls. Mariposa County, California. September 1897. #1:/Yosemite National Park/wcd0364d ID. Walcott, C.D. 364d Yosemite National Park, California. Domes above Nevada Falls. Mariposa County, California. September 1897. #1:/Yosemite National Park/wcd0364e ID. Walcott, C.D. 364e Yosemite National Park, California. Domes above Nevada Falls. Mariposa County, California. September 1897. #1:/Yosemite National Park/wcd00365 ID. Walcott, C.D. 365 Yosemite National Park, California. Liberty Cap, above Nevada Falls. Mariposa County, California. September 1897. #1:/Yosemite National Park/wcd0365a ID. Walcott, C.D. 365a Yosemite National Park, California. Liberty Cap, above Nevada Falls. Mariposa County, California. September 1897. #1:/Yosemite National Park/wcd0365b ID. Walcott, C.D. 365b Yosemite National Park, California. Liberty Cap, above Nevada Falls. Mariposa County, California. September 1897. #1:/Yosemite National Park/wcd0365c ID. Walcott, C.D. 365c Yosemite National Park, California. Liberty Cap, above Nevada Falls. Mariposa County, California. September 1897. #1:/Yosemite National Park/wcd0365d ID. Walcott, C.D. 365d Yosemite National Park, California. Liberty Cap, above Nevada Falls. Mariposa County, California. September 1897. #1:/Yosemite National Park/wcd0365e ID. Walcott, C.D. 365e Yosemite National Park, California. Liberty Cap, above Nevada Falls. Mariposa County, California. September 1897. #1:/Yosemite National Park/wcd00366 ID. Walcott, C.D. 366 Yosemite National Park, California. Fractures in granite at base of Liberty Cap. Mariposa County, California. September 1897. #1:/Yosemite National Park/wcd00367 ID. Walcott, C.D. 367 Yosemite National Park, California. Nevada Falls. Mariposa County, California. September 1897. #1:/Yosemite National Park/wcd00368 ID. Walcott, C.D. 368 Yosemite National Park, California. Vernal Fall. September 1897. #1:/Yosemite National Park/wcd00369 ID. Walcott, C.D. 369 Yosemite National Park, California. On the stream below Vernal Falls. Mariposa County, California. September 1897. #1:/Yosemite National Park/wcd0369a ID. Walcott, C.D. 369a Yosemite National Park, California. On the stream below Vernal Falls. Mariposa County, California. September 1897. #1:/Yosemite National Park/wcd00373 ID. Walcott, C.D. 373 Yosemite National Park, California. North Dome, side view. Mariposa County, California. September 1897. #1:/Yosemite National Park/wcd00374 ID. Walcott, C.D. 374 Yosemite National Park, California. Cliffs above Mirror Lake. Mariposa County, California. September 1897. #1:/Yosemite National Park/wcd0374b ID. Walcott, C.D. 374b Yosemite National Park, California. Cliffs above Mirror Lake. Mariposa County, California. September 1897. #1:/Yosemite National Park/wcd0375b ID. Walcott, C.D. 375b Yosemite National Park, California. North dome and cliff. Mariposa County, California. September 1897. #1:/Yosemite National Park/wcd00376 ID. Walcott, C.D. 376 Yosemite National Park, California. The Arches. Mariposa County, California. September 1897. #1:/Yosemite National Park/wcd0376a ID. Walcott, C.D. 376a Yosemite National Park, California. The Arches. Mariposa County, California. September 1897. #1:/Yosemite National Park/wcd00377 ID. Walcott, C.D. 377 Yosemite National Park, California. Yosemite Valley from below El Capitan. Mariposa County, California. September 1897. #1:/Yosemite National Park/wcd00378 ID. Walcott, C.D. 378 Yosemite National Park, California. El Capitan reflected in the Merced River, Yosemite Valley. Mariposa County, California. September 1897. #1:/Yosemite National Park/wcd00379 ID. Walcott, C.D. 379 Yosemite National Park, California. El Capitan. Mariposa County, California. September 1897. #1:/Yosemite National Park/wcd0379e ID. Walcott, C.D. 379e Yosemite National Park, California. El Capitan. Mariposa County, California. September 1897. #1:/Yosemite National Park/wcd00380 ID. Walcott, C.D. 380 Yosemite National Park, California. Bridal Veil Falls, Yosemite Valley. Mariposa County, California. September 1897. #1:/Yosemite National Park/wcd00381 ID. Walcott, C.D. 381 Yosemite National Park, California. Three Brothers. Mariposa County, California. September 1897. #1:/Yosemite National Park/wcd00382 ID. Walcott, C.D. 382 Yosemite National Park, California. Sentinel Peak. Mariposa County, California. September 1897. #1:/Walcott Collection/wcd00386 ID. Walcott, C.D. 386 Mountain parks, 10 miles west of Custer, Black Hills Custer County, South Dakota. September 1897. #1:/Walcott Collection/wcd00388 ID. Walcott, C.D. 388 Panoramic view from the summit of Custer Peak. Black Hills. This view shows the distribution of the parks and woods about Custer. Panoramic view includes Photo #388,389,390,391,392,and 393. Custer County, South Dakota. September 1897. #1:/Walcott Collection/wcd00389 ID. Walcott, C.D. 389 Panoramic view from the summit of Custer Peak. Black Hills. This view shows the distribution of the parks and woods about Custer. Panoramic view includes Photo #388,389,390,391,392,and 393. Custer County, South Dakota. September 1897. #1:/Walcott Collection/wcd00390 ID. Walcott, C.D. 390 Panoramic view from the summit of Custer Peak. Black Hills. This view shows the distribution of the parks and woods about Custer. Panoramic view includes Photo #388,389,390,391,392,and 393. Custer County, South Dakota. September 1897. #1:/Walcott Collection/wcd00391 ID. Walcott, C.D. 391 Panoramic view from the summit of Custer Peak. Black Hills. This view shows the distribution of the parks and woods about Custer. Panoramic view includes Photo #388,389,390,391,392,and 393. Custer County, South Dakota. September 1897. #1:/Walcott Collection/wcd00392 ID. Walcott, C.D. 392 Panoramic view from the summit of Custer Peak. Black Hills. This view shows the distribution of the parks and woods about Custer. Panoramic view includes Photo #388,389,390,391,392,and 393. Custer County, South Dakota. September 1897. #1:/Walcott Collection/wcd00393 ID. Walcott, C.D. 393 Panoramic view from the summit of Custer Peak. Black Hills. This view shows the distribution of the parks and woods about Custer. Panoramic view includes Photo #388,389,390,391,392,and 393. Custer County, South Dakota. September 1897. #1:/Walcott Collection/wcd00395 ID. Walcott, C.D. 395 Farm in park, 5 miles west southwest of Custer, Black Hills. Custer County, South Dakota. September 1897. #1:/Walcott Collection/wcd00396 ID. Walcott, C.D. 396 Farm in park, 5 miles west southwest of Custer, Black Hills. Custer County, South Dakota. September 1897. #1:/Walcott Collection/wcd00397 ID. Walcott, C.D. 397 Farm in park, 5 miles west southwest of Custer, Black Hills. Custer County, South Dakota. September 1897. #1:/Walcott Collection/wcd00398 ID. Walcott, C.D. 398 Forest through which fire has run. 7 Miles east of Custer. Black Hills. Custer County, South Dakota. September 1897. #1:/Walcott Collection/wcd00399 ID. Walcott, C.D. 399 Young growth of pines starting up in an area where a fire has swept through the forest, 7 miles east of Custer, Black Hills. Custer County, South Dakota. September 1897. #1:/Walcott Collection/wcd00401 ID. Walcott, C.D. 401 Young growth of pines starting up in an area where a fire has swept through the forest, 7 miles east of Custer, Black Hills. Custer County, South Dakota. September 1897. #1:/Walcott Collection/wcd00402 ID. Walcott, C.D. 402 Young growth of pines starting up in an area where a fire has swept through the forest, 7 miles east of Custer, Black Hills. Custer County, South Dakota. September 1897. #1:/Walcott Collection/wcd00403 ID. Walcott, C.D. 403 Slashing left by lumber men who have taken out only butt log, 3 miles north of Custer, Black Hills. Custer County, South Dakota. September 1897. #1:/Walcott Collection/wcd00404 ID. Walcott, C.D. 404 Slashing left by lumber men who have taken out only butt log, 3 miles north of Custer, Black Hills. Custer County, South Dakota. September 1897. #1:/Walcott Collection/wcd00405 ID. Walcott, C.D. 405 View of pegmatite rocks on Sylvan Lake, 6 miles north northeast of Custer, Black Hills. Custer County, South Dakota. September 1897. #1:/Walcott Collection/wcd00406 ID. Walcott, C.D. 406 View of pegmatite rocks on Sylvan Lake, 6 miles north northeast of Custer, Black Hills. Custer County, South Dakota. September 1897. #1:/Walcott Collection/wcd00407 ID. Walcott, C.D. 407 View of pegmatite rocks on Sylvan Lake, 6 miles north northeast of Custer, Black Hills. Custer County, South Dakota. September 1897. #1:/Walcott Collection/wcd00408 ID. Walcott, C.D. 408 View of pegmatite rocks on Sylvan Lake, 6 miles north northeast of Custer, Black Hills. Custer County, South Dakota. September 1897. #1:/Walcott Collection/wcd00409 ID. Walcott, C.D. 409 View of pegmatite rocks on Sylvan Lake, 6 miles north northeast of Custer, Black Hills. Custer County, South Dakota. September 1897. #1:/Walcott Collection/wcd00410 ID. Walcott, C.D. 410 View from the summit of Harney Peak, Black Hills. Pennington County, South Dakota. September 1897. #1:/Walcott Collection/wcd00411 ID. Walcott, C.D. 411 View from the summit of Harney Peak, Black Hills. Pennington County, South Dakota. September 1897. #1:/Walcott Collection/wcd00412 ID. Walcott, C.D. 412 View from the summit of Harney Peak, Black Hills. Pennington County, South Dakota. September 1897. #1:/Walcott Collection/wcd00413 ID. Walcott, C.D. 413 View from the summit of Harney Peak, Black Hills. Pennington County, South Dakota. September 1897. #1:/Walcott Collection/wcd00414 ID. Walcott, C.D. 414 View from the summit of Harney Peak, Black Hills. Pennington County, South Dakota. September 1897. #1:/Walcott Collection/wcd00415 ID. Walcott, C.D. 415 View of eroded pegmatite rocks below the "Needles" in the trail from Sylvan Lake to Harney Peak, Black Hills. Pennington County, South Dakota. September 1897. #1:/Walcott Collection/wcd00416 ID. Walcott, C.D. 416 View of eroded pegmatite rocks below the "Needles" in the trail from Sylvan Lake to Harney Peak, Black Hills. Pennington County, South Dakota. September 1897. #1:/Walcott Collection/wcd0417a ID. Walcott, C.D. 417a View of eroded pegmatite rocks below the "Needles" in the trail from Sylvan Lake to Harney Peak, Black Hills. Pennington County, South Dakota. September 1897. #1:/Walcott Collection/wcd00418 ID. Walcott, C.D. 418 View of eroded pegmatite rocks below the "Needles" in the trail from Sylvan Lake to Harney Peak, Black Hills. Pennington County, South Dakota. September 1897. #1:/Walcott Collection/wcd00419 ID. Walcott, C.D. 419 View of eroded pegmatite rocks below the "Needles" in the trail from Sylvan Lake to Harney Peak, Black Hills. Pennington County, South Dakota. September 1897. #1:/Walcott Collection/wcd00421 ID. Walcott, C.D. 421 Eroded pegmatite rocks near roadside, 7 miles east of Custer, Black Hills. Pennington County, South Dakota. September 1897. #1:/Walcott Collection/wcd00424 ID. Walcott, C.D. 424 Summit of Harney Peak, Black Hills. People sitting on the rocks are J.A. Holmes, C.D. Walcott and Henry Gannett. Pennington County, South Dakota. August 12, 1897. #1:/Walcott Collection/wcd00425 ID. Walcott, C.D. 425 Big Horn Mountains, Wyoming, southwest of Sheridan. Sheridan County, Wyoming. August 1897. #1:/Walcott Collection/wcd00426 ID. Walcott, C.D. 426 Big Horn Mountains, Wyoming. Near Little Goose Creek Canyon, showing where forest fire has stopped at drainage line. Sheridan County, Wyoming. August 1897. #1:/Walcott Collection/wcd00427 ID. Walcott, C.D. 427 Big Horn Mountains, Wyoming. Mountain side partly deforested by fire. Near Little Goose Creek Canyon. Sheridan County, Wyoming. August 1897. #1:/Walcott Collection/wcd00428 ID. Walcott, C.D. 428 Big Horn Mountains, Wyoming. Eastward facing slope, near Hyattswille road southwest of Sheridan. Sheridan County, Wyoming. August 1897. #1:/Walcott Collection/wcd00429 ID. Walcott, C.D. 429 Big Horn Mountains, Wyoming. Parks above 7,000 feet elevation on line of the Hyattsville road west of Teepe Creek, southwest of Sheridan. Sheridan County, Wyoming. August 1897. #1:/Walcott Collection/wcd00431 ID. Walcott, C.D. 431 Big Horn Mountains, Wyoming. Parks above 7,000 feet elevation on line of the Hyattsville road west of Teepe Creek, southwest of Sheridan. Sheridan County, Wyoming. August 1897. #1:/Walcott Collection/wcd00432 ID. Walcott, C.D. 432 Big Horn Mountains, Wyoming. Parks above 7,000 feet elevation on line of the Hyattsville road west of Teepe Creek, southwest of Sheridan. Sheridan County, Wyoming. August 1897. #1:/Walcott Collection/wcd00433 ID. Walcott, C.D. 433 Big Horn Mountains, Wyoming. Parks above 7,000 feet elevation on line of the Hyattsville road west of Teepe Creek, southwest of Sheridan. Sheridan County, Wyoming. August 1897. #1:/Walcott Collection/wcd00435 ID. Walcott, C.D. 435 Big Horn Mountains, Wyoming. Parks above 7,000 feet elevation on line of the Hyattsville road west of Teepe Creek, southwest of Sheridan. Sheridan County, Wyoming. August 1897. #1:/Walcott Collection/wcd00436 ID. Walcott, C.D. 436 Big Horn Mountains, Wyoming. View of eastward dipping Paleozoic rocks forming eastern summit and slop of the mountains southwest of Sheridan. Sheridan County, Wyoming. August 1897. #1:/Walcott Collection/wcd00437 ID. Walcott, C.D. 437 Big Horn Mountains, Wyoming. Park of Hyattsville Road, east fork of Big Goose Creek. Sheridan County, Wyoming. August 1897. #1:/Walcott Collection/wcd00438 ID. Walcott, C.D. 438 Big Horn Mountains, Wyoming. Park of Hyattsville Road, east fork of Big Goose Creek. Sheridan County, Wyoming. August 1897. #1:/Walcott Collection/wcd00439 ID. Walcott, C.D. 439 Big Horn Mountains, Wyoming. Fallen timber 10 to 15 years after fire ran through it. New forest growth slowly starting up. Hyattsville Road, east fork of Big Goose Creek. Sheridan County, Wyoming. August 1897. #1:/Walcott Collection/wcd00440 ID. Walcott, C.D. 440 Big Horn Mountains, Wyoming. Fallen timber 10 to 15 years after fire ran through it. New forest growth slowly starting up. Hyattsville Road, east fork of Big Goose Creek. Sheridan County, Wyoming. August 1897. #1:/Walcott Collection/wcd00441 ID. Walcott, C.D. 441 Big Horn Mountains, Wyoming. Fallen timber 10 to 15 years after fire ran through it. New forest growth slowly starting up. Hyattsville Road, east fork of Big Goose Creek. Sheridan County, Wyoming. August 1897. #1:/Walcott Collection/wcd00442 ID. Walcott, C.D. 442 Big Horn Mountains, Wyoming. Remnants of forest left after fire. Near Hyattsville Road, east fork of Big Goose Creek. Sheridan County, Wyoming. August 1897. #1:/Walcott Collection/wcd00443 ID. Walcott, C.D. 443 Big Horn Mountains, Wyoming. Remnants of forest left after fire. Near Hyattsville Road, east fork of Big Goose Creek. Sheridan County, Wyoming. August 1897. #1:/Walcott Collection/wcd00444 ID. Walcott, C.D. 444 Big Horn Mountains, Wyoming. Remnants of forest left after fire. Near Hyattsville Road, east fork of Big Goose Creek. Sheridan County, Wyoming. August 1897. #1:/Walcott Collection/wcd00445 ID. Walcott, C.D. 445 Big Horn Mountains, Wyoming. Upland parks, above 7,000 feet near headwaters of Tongue River. Sheridan County, Wyoming. August 1897. #1:/Walcott Collection/wcd00446 ID. Walcott, C.D. 446 Big Horn Mountains, Wyoming. Upland parks, above 7,000 feet near headwaters of Tongue River. Sheridan County, Wyoming. August 1897. #1:/Walcott Collection/wcd00447 ID. Walcott, C.D. 447 Big Horn Mountains, Wyoming. Upland parks, above 7,000 feet near headwaters of Tongue River. Sheridan County, Wyoming. August 1897. #1:/Walcott Collection/wcd00448 ID. Walcott, C.D. 448 Big Horn Mountains, Wyoming. View of cliffs on Bald Mountain Road, east of Little Baldy. Sheridan County, Wyoming. August 1897. #1:/Walcott Collection/wcd00449 ID. Walcott, C.D. 449 Big Horn Mountains, Wyoming. View of cliffs on Bald Mountain Road, east of Little Baldy. Big Horn County, Wyoming. August 1897. #1:/Walcott Collection/wcd00450 ID. Walcott, C.D. 450 Big Horn Mountains, Wyoming. View of cliffs on Bald Mountain Road, east of Little Baldy. Big Horn County, Wyoming. August 1897. #1:/Walcott Collection/wcd00451 ID. Walcott, C.D. 451 Big Horn Mountains, Wyoming. View of cliffs on Bald Mountain Road, east of Little Baldy. Big Horn County, Wyoming. August 1897. #1:/Wyoming -Professional paper 51/wcd00452 ID. Walcott, C.D. 452 Typical cliffs of Bighorn limestone, southeast of Bald Mountain. Bighorn County, Wyoming. August 1897. Plate 12-A in U.S. Geological Survey. Professional paper 51. 1906. #1:/Walcott Collection/wcd00453 ID. Walcott, C.D. 453 Big Horn Mountains, Wyoming. View of Little Bald Mountain from the eastward. Big Horn County, Wyoming. August 1897. #1:/Walcott Collection/wcd00454 ID. Walcott, C.D. 454 Big Horn Mountains, Wyoming. Forested mountain slope south of Bald Mountain Road, 10 miles from Little Baldy. Sheridan County, Wyoming. August 1897. #1:/Walcott Collection/wcd00455 ID. Walcott, C.D. 455 Big Horn Mountains, Wyoming. Panoramic view from the summit of Little Bald Mountain to the north and northeast, showing irregular distribution of woodlands and forest. Sheridan County, Wyoming. August 1897. #1:/Walcott Collection/wcd00456 ID. Walcott, C.D. 456 Big Horn Mountains, Wyoming. Panoramic view from the summit of Little Bald Mountain to the north and northeast, showing irregular distribution of woodlands and forest. Sheridan County, Wyoming. August 1897. #1:/Walcott Collection/wcd00457 ID. Walcott, C.D. 457 Big Horn Mountains, Wyoming. Panoramic view from the summit of Little Bald Mountain to the north and northeast, showing irregular distribution of woodlands and forest. Sheridan County, Wyoming. August 1897. #1:/Walcott Collection/wcd00458 ID. Walcott, C.D. 458 Big Horn Mountains, Wyoming. Panoramic view from the summit of Little Bald Mountain to the north and northeast, showing irregular distribution of woodlands and forest. Sheridan County, Wyoming. August 1897. #1:/Walcott Collection/wcd00459 ID. Walcott, C.D. 459 Big Horn Mountains, Wyoming. Panoramic view from the summit of Little Bald Mountain to the north and northeast, showing irregular distribution of woodlands and forest. Sheridan County, Wyoming. August 1897. #1:/Wyoming -Professional paper 51/wcd00460 ID. Walcott, C.D. 460 Typical weathered surface of Bighorn limestone, shows projecting reticulations due to silica. The space represented is about 4 x 5 feet. Sheridan County, Wyoming. August 1897. Plate 11-B in U.S. Geological Survey. Professional paper 51. 1906. #1:/Walcott Collection/wcd00461 ID. Walcott, C.D. 461 Big Horn Mountains, Wyoming. Outlier of Cambrian and Silurian rocks, interior plateau, on Bald Mountain Road. Sheridan County, Wyoming. August 1897. #1:/Walcott Collection/wcd00462 ID. Walcott, C.D. 462 Big Horn Mountains, Wyoming. Park and forest near eastern summit of Bald Mountain Road, north of Tongue River. Sheridan County, Wyoming. August 1897. #1:/Walcott Collection/wcd00463 ID. Walcott, C.D. 463 Big Horn Mountains, Wyoming. Eroded granite near Bald Mountain at eastern summit, overlooking valley toward Dayton. Sheridan County, Wyoming. August 1897. #1:/Walcott Collection/wcd00465 ID. Walcott, C.D. 465 Big Horn Mountains, Wyoming. Eroded granite near Bald Mountain at eastern summit, overlooking valley toward Dayton. Sheridan County, Wyoming. August 1897. #1:/Wyoming-Images/wcd00467 ID. Walcott, C.D. 467 Logged off forest on east slope of Big Horn Mountains, northwest of Dayton. Sheridan County, Wyoming. August 1897. Lower left photograph page 20 , Images of the U.S. Geological Survey, 1879-1979. #1:/Walcott Collection/wcd00471 ID. Walcott, C.D. 471 Big Horn Mountains, Wyoming. Panoramic view of eastern slope on Bald Mountain Road northwest of Dayton. Sheridan County, Wyoming. August 1897. #1:/Walcott Collection/wcd00472 ID. Walcott, C.D. 472 Camp at Dayton, beside Tongue River. A.C. Peale, standing by wagon. Sheridan County, Wyoming. August 1897. #1:/Walcott Collection/wcd00473 ID. Walcott, C.D. 473 Big Horn Mountains. Open park on summit of Big Horn Mountains. Sheridan County, Wyoming. August 1897. #1:/Walcott Collection/wcd00474 ID. Walcott, C.D. 474 Yellowstone National Park. Cliffs in the Yellowstone Canyon, above Inspiration Point. Sheridan County, Wyoming. August 1897. #1:/Walcott Collection/wcd0474a ID. Walcott, C.D. 474a Yellowstone National Park. Cliffs in the Yellowstone Canyon, above Inspiration Point. Sheridan County, Wyoming. August 1897. #1:/Walcott Collection/wcd0474b ID. Walcott, C.D. 474b Yellowstone National Park. Cliffs in the Yellowstone Canyon, above Inspiration Point. Sheridan County, Wyoming. August 1897. #1:/Walcott Collection/wcd00475 ID. Walcott, C.D. 475 Yellowstone National Park. Bear's in vicinity of garbage dump near Fountain Hotel, Fountain Geyser Basin. Sheridan County, Wyoming. August 1897. #1:/Walcott Collection/wcd0475a ID. Walcott, C.D. 475a Yellowstone National Park. Bear's in vicinity of garbage dump near Fountain Hotel, Fountain Geyser Basin. Sheridan County, Wyoming. August 1897. #1:/Walcott Collection/wcd0475b ID. Walcott, C.D. 475b Yellowstone National Park. Bear's in vicinity of garbage dump near Fountain Hotel, Fountain Geyser Basin. Sheridan County, Wyoming. August 1897. #1:/Walcott Collection/wcd0475c ID. Walcott, C.D. 475c Yellowstone National Park. Bear's in vicinity of garbage dump near Fountain Hotel, Fountain Geyser Basin. Sheridan County, Wyoming. August 1897. #1:/Walcott Collection/wcd0475d ID. Walcott, C.D. 475d Yellowstone National Park. Bear's in vicinity of garbage dump near Fountain Hotel, Fountain Geyser Basin. Sheridan County, Wyoming. August 1897. #1:/Walcott Collection/wcd0475e ID. Walcott, C.D. 475e Yellowstone National Park. Bear's in vicinity of garbage dump near Fountain Hotel, Fountain Geyser Basin. Sheridan County, Wyoming. August 1897. #1:/Yellowstone National Park/wcd0475f ID. Walcott, C.D. 475f Yellowstone National Park, Wyoming. Bears feeding on a garbage dump near Fountain Hotel. August 1897. See also photo cdd00158. #1:/Walcott Collection/wcd0475g ID. Walcott, C.D. 475g Yellowstone National Park. Bear's in vicinity of garbage dump near Fountain Hotel, Fountain Geyser Basin. Sheridan County, Wyoming. August 1897. #1:/Yellowstone National Park/wcd00476 ID. Walcott, C.D. 476 Yellowstone National Park, Wyoming. Tame antelope on Frank Island in Yellowstone Lake. August 1897. #1:/Yellowstone National Park/wcd00477 ID. Walcott, C.D. 477 Yellowstone National Park, Wyoming. Elk in a fenced enclosure on Frank Island in Yellowstone Lake. August 1897. #1:/Yellowstone National Park/wcd0478a ID. Walcott, C.D. 478a Yellowstone National Park. Buffalo on Frank Island, Yellowstone Lake. Sheridan County, Wyoming. August 1897. #1:/Yellowstone National Park/wcd0478b ID. Walcott, C.D. 478b Yellowstone National Park, Wyoming. Buffalo on Frank Island in Yellowstone Lake. August 1897. #1:/Yellowstone National Park/wcd0478c ID. Walcott, C.D. 478c Yellowstone National Park, Wyoming. Adult buffalo and calf on Frank Island in Yellowstone Lake. August 1897. #1:/Yellowstone National Park/wcd0478d ID. Walcott, C.D. 478d Yellowstone National Park. Buffalo on Frank Island, Yellowstone Lake. Sheridan County, Wyoming. August 1897. #1:/Yellowstone National Park/wcd0478e ID. Walcott, C.D. 478e Yellowstone National Park. Buffalo on Frank Island, Yellowstone Lake. Sheridan County, Wyoming. August 1897. #1:/Yellowstone National Park/wcd0478f ID. Walcott, C.D. 478f Yellowstone National Park. Buffalo on Frank Island, Yellowstone Lake. Sheridan County, Wyoming. August 1897. #1:/Yellowstone National Park/wcd0478g ID. Walcott, C.D. 478g Yellowstone National Park. Buffalo on Frank Island, Yellowstone Lake. Sheridan County, Wyoming. August 1897. #1:/Yellowstone National Park/wcd0478h ID. Walcott, C.D. 478h Yellowstone National Park. Buffalo on Frank Island, Yellowstone Lake. Sheridan County, Wyoming. August 1897. #1:/Yellowstone National Park/wcd0478i ID. Walcott, C.D. 478i Yellowstone National Park. Buffalo on Frank Island, Yellowstone Lake. Sheridan County, Wyoming. August 1897. #1:/Yellowstone National Park/wcd0478k ID. Walcott, C.D. 478k Yellowstone National Park. Buffalo on Frank Island, Yellowstone Lake. Sheridan County, Wyoming. August 1897. #1:/Yellowstone National Park/wcd00479 ID. Walcott, C.D. 479 Distant view of divide at the head of south fork of Big Pine Creek, Sierra Nevada Mountains. Inyo county, California. October 1897. #1:/Yellowstone National Park/wcd0479a ID. Walcott, C.D. 479a Distant view of divide at the head of south fork of Big Pine Creek, Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd00480 ID. Walcott, C.D. 480 View near the headwaters of the north fork of Big Pine Creek, Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd0480b ID. Walcott, C.D. 480b View near the headwaters of the north fork of Big Pine Creek, Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd0480d ID. Walcott, C.D. 480d View near the headwaters of the north fork of Big Pine Creek, Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd0480e ID. Walcott, C.D. 480e View near the headwaters of the north fork of Big Pine Creek, Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd00481 ID. Walcott, C.D. 481 Approaching the divide at the head of the north fork of Big Pine Creek, during a storm. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd00482 ID. Walcott, C.D. 482 Granite boulders near the summit of the divide at the head of Big Pine Creek. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd0482a ID. Walcott, C.D. 482a Granite boulders near the summit of the divide at the head of Big Pine Creek. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd00483 ID. Walcott, C.D. 483 Granite peak rising from the south side of the divide at the north fork of Big Pine Creek. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd00485 ID. Walcott, C.D. 485 Falls below first lake, north fork of Big Pine Creek. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd00486 ID. Walcott, C.D. 486 Granite ledges showing the effect of glaciation. View taken from just above the first lake, north fork of Big Pine Creek. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd0486a ID. Walcott, C.D. 486a Granite ledges showing the effect of glaciation. View taken from just above the first lake, north fork of Big Pine Creek. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd00487 ID. Walcott, C.D. 487 Glacial cut in barrier between first and second lakes, north fork of Big Pine Creek. The depth is shown by the figure of Mr. Weeks, who stands at the bottom of the cut. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd00488 ID. Walcott, C.D. 488 View of second and third lakes, illustrating their glacial origin, north fork of Big Pine Creek. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd0488a ID. Walcott, C.D. 488a View of second and third lakes, illustrating their glacial origin, north fork of Big Pine Creek. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd0488c ID. Walcott, C.D. 488c View of second and third lakes, illustrating their glacial origin, north fork of Big Pine Creek. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd0488d ID. Walcott, C.D. 488d View of second and third lakes, illustrating their glacial origin, north fork of Big Pine Creek. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd0488e ID. Walcott, C.D. 488e View of second and third lakes, illustrating their glacial origin, north fork of Big Pine Creek. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd00489 ID. Walcott, C.D. 489 View of west end of first lake, north fork of Big Pine Creek. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd00490 ID. Walcott, C.D. 490 View of granite barrier at east (lower) end of second lake, north fork of Big Pine Creek. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd00491 ID. Walcott, C.D. 491 Camp at first lake, north fork of Big Pine Creek. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd00492 ID. Walcott, C.D. 492 Mountain park in granite area, about 5 miles west of Wancobi Peak. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd0492a ID. Walcott, C.D. 492a Mountain park in granite area, about 5 miles west of Wancobi Peak. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd00493 ID. Walcott, C.D. 493 Eroded granites in mountain park. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd0493a ID. Walcott, C.D. 493a Eroded granites in mountain park. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd0493b ID. Walcott, C.D. 493b Eroded granites in mountain park. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd0493c ID. Walcott, C.D. 493c Eroded granites in mountain park. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd0493d ID. Walcott, C.D. 493d Eroded granites in mountain park. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd00494 ID. Walcott, C.D. 494 Unconformity between the lake beds and Cambrian quartzitic sandstones, Waucobi Canyon, below Devils Gate. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd00495 ID. Walcott, C.D. 495 Conglomerates near lake beds, near contact with Cambrian quartzitic sandstones, Waucobi Canyon, below Devils Gate. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd00496 ID. Walcott, C.D. 496 View of end of ridge illustrating faulting and thrust beds of Cambrian limestone and quartzitic sandstone. Waucobi Canyon, about 3 miles above mouth of canyon. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd00497 ID. Walcott, C.D. 497 Nearer view of a portion of the strata show in Photo #496. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd00498 ID. Walcott, C.D. 498 Folder limestone and intruded quartzitic sandstones, south side of Devils Gate, Waucobi Canyon. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd0498a ID. Walcott, C.D. 498a Folder limestone and intruded quartzitic sandstones, south side of Devils Gate, Waucobi Canyon. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd00499 ID. Walcott, C.D. 499 Lake beds near Cambrian quartzitic sandstones north side of west entrance to Devils Gate. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd00500 ID. Walcott, C.D. 500 Waucobi Mountain from the southeast. The contact of the light Cambrian or pre-Cambrian limestones with the granite is shown in the low hill at the right. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd00501 ID. Walcott, C.D. 501 View near headwaters of north fork of Big Pine Creek. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd0501a ID. Walcott, C.D. 501a View near headwaters of north fork of Big Pine Creek. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd0501c ID. Walcott, C.D. 501c View near headwaters of north fork of Big Pine Creek. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd0501d ID. Walcott, C.D. 501d View near headwaters of north fork of Big Pine Creek. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd0501e ID. Walcott, C.D. 501e View near headwaters of north fork of Big Pine Creek. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd0501f ID. Walcott, C.D. 501f View near headwaters of north fork of Big Pine Creek. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd00502 ID. Walcott, C.D. 502 View near headwaters of north fork of Big Pine Creek. North side of the canyon. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd0502a ID. Walcott, C.D. 502a View near headwaters of north fork of Big Pine Creek. North side of the canyon. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd0502b ID. Walcott, C.D. 502b View near headwaters of north fork of Big Pine Creek. North side of the canyon. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd00503 ID. Walcott, C.D. 503 Approaching the divide at head of north fork of Big Pine Creek, during a storm. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd0503b ID. Walcott, C.D. 503b Approaching the divide at head of north fork of Big Pine Creek, during a storm. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd00504 ID. Walcott, C.D. 504 Granite peak rising from the south side of the divide, head of north fork of Big Pine Creek. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd0505a ID. Walcott, C.D. 505a Looking west into the heart of the Sierra Nevada Mountains, from the divide at the head of Big Pine Creek. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd00506 ID. Walcott, C.D. 506 Broken granite peak rising from north side of divide on north fork of Big Pine Creek. Sierra Nevada Mountains. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd0509a ID. Walcott, C.D. 509a View of the Sierra Nevada Range, from eastern side of Owens Valley. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd0509b ID. Walcott, C.D. 509b View of the Sierra Nevada Range, from eastern side of Owens Valley. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd0509c ID. Walcott, C.D. 509c View of the Sierra Nevada Range, from eastern side of Owens Valley. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd0509d ID. Walcott, C.D. 509d View of the Sierra Nevada Range, from eastern side of Owens Valley. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd0509e ID. Walcott, C.D. 509e View of the Sierra Nevada Range, from eastern side of Owens Valley. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd00510 ID. Walcott, C.D. 510 View of the upturned Silurian and Cambrian beds on eastern side of Mazorca Canyon. Sierra Nevada Range. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd00511 ID. Walcott, C.D. 511 Folded limestone and intruded quartzitic sandstones, south side of Devils Gate, Waucobi Canyon. Canyon. Sierra Nevada Range. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd0511c ID. Walcott, C.D. 511c Folded limestone and intruded quartzitic sandstones, south side of Devils Gate, Waucobi Canyon. Canyon. Sierra Nevada Range. Inyo County, California. October 1897. #1:/Yellowstone National Park/wcd00512 ID. Walcott, C.D. 512 Yellowstone National Park, Wyoming. Natural (rhyolite(?) bridge 3 miles southwest of the Lake Hotel. 1897. #1:/Yellowstone National Park/wcd0512b ID. Walcott, C.D. 512b Yellowstone National Park, Wyoming. Natural (rhyolite(?) bridge 3 miles southwest of the Lake Hotel. 1897. #1:/Yellowstone National Park/wcd0512d ID. Walcott, C.D. 512d Yellowstone National Park, Wyoming. Top of the natural bridge shown in photo wcd00512. Path marks the top of the bridge. 1897. #1:/Yellowstone National Park/wcd00514 ID. Walcott, C.D. 514 Yellowstone National Park, Wyoming. Toward the summit of terraces south of Mammoth Hot Springs. October 1897. #1:/Yellowstone National Park/wcd00515 ID. Walcott, C.D. 515 Yellowstone National Park, Wyoming. Angel Terrace near Mammoth Hot Springs Hotel. October 1897. #1:/Yellowstone National Park/wcd0515a ID. Walcott, C.D. 515a Yellowstone National Park, Wyoming. Angel Terrace near Mammoth Hot Springs Hotel. October 1897. #1:/Yellowstone National Park/wcd00516 ID. Walcott, C.D. 516 Yellowstone National Park, Wyoming. View showing method of deposition of the siliceous deposits on slop of hot springs, summit of Angel Terrace. October 1897. #1:/Yellowstone National Park/wcd0516a ID. Walcott, C.D. 516a Yellowstone National Park, Wyoming. View showing method of deposition of the siliceous deposits on slop of hot springs, summit of Angel Terrace. October 1897. #1:/Yellowstone National Park/wcd0516b ID. Walcott, C.D. 516b Yellowstone National Park, Wyoming. View showing method of deposition of the siliceous deposits on slop of hot springs, summit of Angel Terrace. October 1897. #1:/Yellowstone National Park/wcd00518 ID. Walcott, C.D. 518 Yellowstone National Park, Wyoming. Calcareous algae floating in water near the outlet of Hot Springs. Summit of Angel Terrace. October 1897. #1:/Walcott Collection/wcd00520 ID. Walcott, C.D. 520 Unconformity between Middle Cambrian quartzites and subjacent Algonkian rocks. Railroad cut on east side of Deadwood. Lawence County, South Dakota. October 1897. #1:/Walcott Collection/wcd00521 ID. Walcott, C.D. 521 Big Horn Mountains. Cliffs along Bald Mountain Road, east of Little Baldy. Sheridan County. Wyoming. 1897. #1:/Walcott Collection/wcd00522 ID. Walcott, C.D. 522 Big Horn Mountains. Fallen timber 10 to 15 year after passage of fire through it. New forest growth starting up. Hyattsville road, east fork of Big Goose Creek. Sheridan County. Wyoming. 1897. #1:/Walcott Collection/wcd00523 ID. Walcott, C.D. 523 Missouri River beds, above railroad bridge, near Townsend. Broadwater County, Montana. 1898. #1:/Walcott Collection/wcd00524 ID. Walcott, C.D. 524 Basal beds of Cambrian sandstone (Flathead) at Indian Creek, 4 miles west of Townsend. Broadwater County, Montana. 1898. #1:/Walcott Collection/wcd00525 ID. Walcott, C.D. 525 Hogback formed by upturned basal Cambrian sandstone (Flathead), at Indian Creek, 4 miles west of Townsend. Broadwater County, Montana. 1898. #1:/Walcott Collection/wcd0525a ID. Walcott, C.D. 525a Hogback formed by upturned basal Cambrian sandstone (Flathead), at Indian Creek, 4 miles west of Townsend. Broadwater County, Montana. 1898. #1:/Walcott Collection/wcd0525b ID. Walcott, C.D. 525b Hogback formed by upturned basal Cambrian sandstone (Flathead), at Indian Creek, 4 miles west of Townsend. Broadwater County, Montana. 1898. #1:/Walcott Collection/wcd00526 ID. Walcott, C.D. 526 Panoramic view of Paleozoic rocks at mouth of Indian Creek, 4 to 6 miles west of Townsend. Broadwater County, Montana. 1898. #1:/Walcott Collection/wcd0526a ID. Walcott, C.D. 526a Panoramic view of Paleozoic rocks at mouth of Indian Creek, 4 to 6 miles west of Townsend. Broadwater County, Montana. 1898. #1:/Walcott Collection/wcd0526b ID. Walcott, C.D. 526b Panoramic view of Paleozoic rocks at mouth of Indian Creek, 4 to 6 miles west of Townsend. Broadwater County, Montana. 1898. #1:/Walcott Collection/wcd0526c ID. Walcott, C.D. 526c Panoramic view of Paleozoic rocks at mouth of Indian Creek, 4 to 6 miles west of Townsend. Broadwater County, Montana. 1898. #1:/Montan- Bulletin 319/wcd0527a ID. Walcott, C.D. 527a Artesian reservoirs, cleavage planes. Slaty shales in which pre-Cambrian fossils were found, mouth of Deep Creek Canyon 16 miles east of Townsend, Broadwater County, Montana. 1898. Plate 7-B in U.S. Geological Survey. Bulletin 319. 1908. Plate 7-A in U.S. Geological Survey. Water-supply paper 489. 1923. #1:/Walcott Collection/wcd0527b ID. Walcott, C.D. 527b Slaty shales in which pre-Cambrian fossils were found, mouth of Deep Creek Canyon, 16 miles east of Townsend. Broadwater County, Montana. 1898. #1:/Walcott Collection/wcd00528 ID. Walcott, C.D. 528 Placer diggings in White's Gulch, 15 miles east-south-east of Canyon Ferry, Big Belt Mountains. Broadwater County, Montana. 1898. #1:/Walcott Collection/wcd00529 ID. Walcott, C.D. 529 Paleozoic rocks near mouth of Avalanche Canyon, west foot of Big Belt Mountains. 12 miles east of Canyon Ferry. Broadwater County, Montana. 1898. #1:/Walcott Collection/wcd0529a ID. Walcott, C.D. 529a Paleozoic rocks near mouth of Avalanche Canyon, west foot of Big Belt Mountains. 12 miles east of Canyon Ferry. Broadwater County, Montana. 1898. #1:/Walcott Collection/wcd00530 ID. Walcott, C.D. 530 Looking toward head of White's Gulch, Big Belt Mountains, about 18 miles east southeast of Canyon Ferry. Broadwater County, Montana. 1898. #1:/Walcott Collection/wcd00531 ID. Walcott, C.D. 531 Red shales of Belt Terrace, White's Gulch, Big Belt Mountains, about 15 miles east southeast of Canyon Ferry. Broadwater County, Montana. 1898. #1:/Walcott Collection/wcd00532 ID. Walcott, C.D. 532 Looking down White's Gulch in cut through Cambrian and pre-Cambrian, about 14 miles east southeast of Canyon Ferry, Big Belt Mountains. Broadwater County, Montana. 1898. #1:/Walcott Collection/wcd00533 ID. Walcott, C.D. 533 Siliceous beds beneath Helena Limestone on ridge from Marysville to Empire. Lewis and Clark County, Montana. 1898. #1:/Walcott Collection/wcd00534 ID. Walcott, C.D. 534 Eroded Carboniferous sandstones, in cliff 8 miles south of Livingston. Park County, Montana. 1898. #1:/Walcott Collection/wcd0534a ID. Walcott, C.D. 534a Eroded Carboniferous sandstones, in cliff 8 miles south of Livingston. Park County, Montana. 1898. #1:/Walcott Collection/wcd0534b ID. Walcott, C.D. 534b Eroded Carboniferous sandstones, in cliff 8 miles south of Livingston. Park County, Montana. 1898. #1:/Walcott Collection/wcd0534c ID. Walcott, C.D. 534c Eroded Carboniferous sandstones, in cliff 8 miles south of Livingston. Park County, Montana. 1898. #1:/Walcott Collection/wcd0534d ID. Walcott, C.D. 534d Eroded Carboniferous sandstones, in cliff 8 miles south of Livingston. Park County, Montana. 1898. #1:/Walcott Collection/wcd00536 ID. Walcott, C.D. 536 Panoramic view of north side of Beaver Creek, Big Belt Mountains, showing succession from Cambrian to Carboniferous. Lewis and Clark County, Montana. 1898. #1:/Walcott Collection/wcd0536b ID. Walcott, C.D. 536b Panoramic view of north side of Beaver Creek, Big Belt Mountains, showing succession from Cambrian to Carboniferous. Lewis and Clark County, Montana. 1898. #1:/Walcott Collection/wcd0536c ID. Walcott, C.D. 536c Panoramic view of north side of Beaver Creek, Big Belt Mountains, showing succession from Cambrian to Carboniferous. Lewis and Clark County, Montana. 1898. #1:/Walcott Collection/wcd0536e ID. Walcott, C.D. 536e Panoramic view of north side of Beaver Creek, Big Belt Mountains, showing succession from Cambrian to Carboniferous. Lewis and Clark County, Montana. 1898. #1:/Walcott Collection/wcd00537 ID. Walcott, C.D. 537 Big Belt Mountains. View of Carboniferous strata on north side of Beaver Creek, above Missouri River. Lewis and Clark County, Montana. 1898. #1:/Walcott Collection/wcd0537a ID. Walcott, C.D. 537a Big Belt Mountains. View of Carboniferous strata on north side of Beaver Creek, above Missouri River. Lewis and Clark County, Montana. 1898. #1:/Walcott Collection/wcd00538 ID. Walcott, C.D. 538 Trout Creek, one and 1/2 miles below York. Broadwater County, Montana. 1898. #1:/Walcott Collection/wcd00539 ID. Walcott, C.D. 539 Looking north down Yankee Jim Canyon, Yellowstone River, one and 1/2 miles north of Yankee Jim. Park County, Montana. 1898. #1:/Walcott Collection/wcd0539a ID. Walcott, C.D. 539a Looking north down Yankee Jim Canyon, Yellowstone River, one and 1/2 miles north of Yankee Jim. Park County, Montana. 1898. #1:/Walcott Collection/wcd0539b ID. Walcott, C.D. 539b Looking north down Yankee Jim Canyon, Yellowstone River, one and 1/2 miles north of Yankee Jim. Park County, Montana. 1898. #1:/Walcott Collection/wcd0539c ID. Walcott, C.D. 539c Looking north down Yankee Jim Canyon, Yellowstone River, one and 1/2 miles north of Yankee Jim. Park County, Montana. 1898. #1:/Walcott Collection/wcd00540 ID. Walcott, C.D. 540 Basal sandstones of Belt Terrane, Sawmill Canyon, Neihart. Cascade County, Montana. 1898. #1:/Walcott Collection/wcd0540a ID. Walcott, C.D. 540a Basal sandstones of Belt Terrane, Sawmill Canyon, Neihart. Cascade County, Montana. 1898. #1:/Walcott Collection/wcd0540c ID. Walcott, C.D. 540c Basal sandstones of Belt Terrane, Sawmill Canyon, Neihart. Cascade County, Montana. 1898. #1:/Walcott Collection/wcd00541 ID. Walcott, C.D. 541 Waterfall over Cambrian limestone, Sheep Creek, toward summit of Teton Range. Southwest of Jackson Lake. Teton County, Wyoming. 1898. #1:/Walcott Collection/wcd00542 ID. Walcott, C.D. 542 Teton Range at head of Sheep Creek, west of north end of Jackson Lake. Teton County, Wyoming. 1898. #1:/Walcott Collection/wcd00543 ID. Walcott, C.D. 543 Yellowstone National Park. Forest on road from Lewis Lake to Snake River Station, Yellowstone timber reserve. Wyoming. 1898. #1:/Yellowstone National Park/wcd0543a ID. Walcott, C.D. 543a Yellowstone National Park, Wyoming. Yellowstone timber reserve on the road from Lewis Lake to Snake River station. 1898. #1:/Yellowstone National Park/wcd0543c ID. Walcott, C.D. 543c Yellowstone National Park, Wyoming. Forest on the road from Lewis Lake to Snake River station. 1898. #1:/Yellowstone National Park/wcd0543d ID. Walcott, C.D. 543d Yellowstone National Park, Wyoming. Yellowstone timber reserve on the road from Lewis Lake to Snake River station. People on horseback in the distant background. 1898. #1:/Walcott Collection/wcd0543b ID. Walcott, C.D. 543b Yellowstone National Park. Forest on road from Lewis Lake to Snake River Station, Yellowstone timber reserve. Wyoming. 1898. #1:/Yellowstone National Park/wcd00544 ID. Walcott, C.D. 544 Yellowstone National Park, Wyoming. Condition of Yellowstone Lake to Lewis Lake road. August 1898. #1:/Walcott Collection/wcd00545 ID. Walcott, C.D. 545 Yellowstone National Park. Big Mud Geyser shortly after eruption. Wyoming. 1898. #1:/Walcott Collection/wcd00546 ID. Walcott, C.D. 546 Panoramic view of the Teton Range. Teton County, Wyoming. 1898. #1:/Walcott Collection/wcd0546a ID. Walcott, C.D. 546a Panoramic view of the Teton Range. Teton County, Wyoming. 1898. #1:/Walcott Collection/wcd0546b ID. Walcott, C.D. 546b Panoramic view of the Teton Range. Teton County, Wyoming. 1898. #1:/Walcott Collection/wcd00548 ID. Walcott, C.D. 548 Mouth of Fountain Geyser shortly before eruption. Yellowstone National Park Wyoming. 1898. #1:/Yellowstone National Park/wcd0548a ID. Walcott, C.D. 548a Yellowstone National Park, Wyoming. Mouth of Fountain Geyser in Lower Geyser Basin. 1898. #1:/Yellowstone National Park/wcd00549 ID. Walcott, C.D. 549 Yellowstone National Park, Wyoming. Siliceous deposits in the basin of Great Fountain Geyser in Lower Geyser Basin. 1898. #1:/Walcott Collection/wcd0549a ID. Walcott, C.D. 549a Yellowstone National Park. Siliceous deposits in the basin of Great Fountain Geyser. Wyoming. 1898. #1:/Yellowstone National Park/wcd00551 ID. Walcott, C.D. 551 Yellowstone National Park, Wyoming. Pool at the summit of Angel Terrace in the Mammoth Hot Springs area. 1898. #1:/Walcott Collection/wcd0552a ID. Walcott, C.D. 552a Yellowstone National Park. Calcareous points covering bottom of pool, Angel Terrance, Mammoth Hot Springs. Wyoming. 1898. #1:/Walcott Collection/wcd00553 ID. Walcott, C.D. 553 Yellowstone National Park. Calcareous deposits in pool, summit of Angel Terrace, Mammoth Hot Springs. Wyoming. 1898. #1:/Walcott Collection/wcd00554 ID. Walcott, C.D. 554 Yellowstone National Park. Calcareous (mushroom-like) Concretionary deposits, Angel Terrace, Mammoth Hot Springs. Wyoming. 1897. #1:/Walcott Collection/wcd00555 ID. Walcott, C.D. 555 Yellowstone National Park. Calcareous algae in outlet of pools, summit of Angel Terrace, Mammoth Hot Springs. Wyoming. 1898. #1:/Walcott Collection/wcd0555b ID. Walcott, C.D. 555b Yellowstone National Park. Calcareous algae in outlet of pools, summit of Angel Terrace, Mammoth Hot Springs. Wyoming. 1898. #1:/Yellowstone National Park/wcd00556 ID. Walcott, C.D. 556 Yellowstone National Park, Wyoming. Oxbow Bend on Trout Creek in Hayden Valley. 1898. #1:/Walcott Collection/wcd00557 ID. Walcott, C.D. 557 North end of Teton Range, Northwest of Jackson Lake. Teton County, Wyoming. 1898. #1:/Walcott Collection/wcd0558a ID. Walcott, C.D. 558a View of the Teton Range from the east shore of Jackson Lake. Teton County, Wyoming. 1898. #1:/Walcott Collection/wcd0558b ID. Walcott, C.D. 558b View of the Teton Range from the east shore of Jackson Lake. Teton County, Wyoming. 1898. #1:/Walcott Collection/wcd0558c ID. Walcott, C.D. 558c View of the Teton Range from the east shore of Jackson Lake. Teton County, Wyoming. 1898. #1:/Walcott Collection/wcd00559 ID. Walcott, C.D. 559 Cambrian limestones dipping eastward into ridge south of Two-mile Canyon, about 3 miles south-south-east of Malad City. Oneida County, Idaho. 1898, #1:/Walcott Collection/wcd00560 ID. Walcott, C.D. 560 West face of ridge east of Cherry Creek Post Office, Malad Valley. Unconformity between Cambrian and Upper Paleozoic is seen in central portion of ridge. Oneida County, Idaho. 1898. #1:/Walcott Collection/wcd00561 ID. Walcott, C.D. 561 Siliceous beds near summit of Cambrian, mouth of Cherry Creek Canyon, about 7 miles south southeast of Malad City. Oneida County, Idaho. 1898. #1:/Walcott Collection/wcd0561a ID. Walcott, C.D. 561a Siliceous beds near summit of Cambrian, mouth of Cherry Creek Canyon, about 7 miles south southeast of Malad City. Oneida County, Idaho. 1898. #1:/Walcott Collection/wcd00562 ID. Walcott, C.D. 562 Basal Cambrian sandstones of section of mouth of Two-mile Canyon, 2 miles south of Malad City. Oneida County, Idaho. 1898. #1:/Walcott Collection/wcd0562a ID. Walcott, C.D. 562a Basal Cambrian sandstones of section of mouth of Two-mile Canyon, 2 miles south of Malad City. Oneida County, Idaho. 1898. #1:/Walcott Collection/wcd00563 ID. Walcott, C.D. 563 Summit of ridge shown in photo #559. View from the north, about 3 miles south of Malad City. Oneida County, Idaho. 1898. #1:/Walcott Collection/wcd00564 ID. Walcott, C.D. 564 Yellowstone National Park. Elk, with horns in the velvet. Camp near Mammoth Hot Springs. Wyoming. 1898. #1:/Walcott Collection/wcd00565 ID. Walcott, C.D. 565 Yellowstone National Park. Boulders in Firehole River. Wyoming. 1898. #1:/Walcott Collection/wcd00567 ID. Walcott, C.D. 567 Quartzites at base of Grayson shales, Belt Terrane Deep Creek Canyon, 14 miles east of Townsend. Broadwater County, Montana. 1898. #1:/Walcott Collection/wcd00568 ID. Walcott, C.D. 568 Surface of quartzite beds showing two systems of joints, Grayson shales, Belt Terrance, Deep Creek Canyon, 14 miles east of Townsend. Broadwater County, Montana. 1898. #1:/Walcott Collection/wcd0569a ID. Walcott, C.D. 569a Contact between the Random sandstone (Algonkian) and the base of the Cambrian. J.P. Howley standing on the Cambrian. Random Sound, east of Hickman Harbor, Trinity Bay. Newfoundland, Canada. 1899. #1:/Walcott Collection/wcd00576 ID. Walcott, C.D. 576 Islands of Algonkian rocks (Avalon) at mouth of Shoal Harbor, near Deer Harbor, Trinity Bay. Newfoundland, Canada. 1899. #1:/Walcott Collection/wcd0576a ID. Walcott, C.D. 576a Islands of Algonkian rocks (Avalon) at mouth of Shoal Harbor, near Deer Harbor, Trinity Bay. Newfoundland, Canada. 1899. #1:/Walcott Collection/wcd0576b ID. Walcott, C.D. 576b Islands of Algonkian rocks (Avalon) at mouth of Shoal Harbor, near Deer Harbor, Trinity Bay. Newfoundland, Canada. 1899. #1:/Walcott Collection/wcd0576d ID. Walcott, C.D. 576d Islands of Algonkian rocks (Avalon) at mouth of Shoal Harbor, near Deer Harbor, Trinity Bay. Newfoundland, Canada. 1899. #1:/Walcott Collection/wcd00578 ID. Walcott, C.D. 578 Cambrian limestone at entrance to harbor of Hearts Desire, Trinity Bay. Newfoundland, Canada. 1899. #1:/Walcott Collection/wcd00579 ID. Walcott, C.D. 579 Icebergs near head of Trinity Bay. Newfoundland, Canada. 1899. #1:/Walcott Collection/wcd0579a ID. Walcott, C.D. 579a Icebergs near head of Trinity Bay. Newfoundland, Canada. 1899. #1:/Walcott Collection/wcd0579b ID. Walcott, C.D. 579b Icebergs near head of Trinity Bay. Newfoundland, Canada. 1899. #1:/Walcott Collection/wcd0579c ID. Walcott, C.D. 579c Icebergs near head of Trinity Bay. Newfoundland, Canada. 1899. #1:/Walcott Collection/wcd0579d ID. Walcott, C.D. 579d Icebergs near head of Trinity Bay. Newfoundland, Canada. 1899. #1:/Walcott Collection/wcd00580 ID. Walcott, C.D. 580 Section of dike showing speroidal structure, east side of Chappel Arm, Trinity Bay. (also see photo #600). Newfoundland, Canada. 1899. #1:/Walcott Collection/wcd00581 ID. Walcott, C.D. 581 Signal Hill Sandstones, north side of entrance to St. Johns Harbor. Newfoundland, Canada. 1899. #1:/Walcott Collection/wcd00582 ID. Walcott, C.D. 582 Signal Hill Sandstone, south side of entrance to St. Johns Harbor. Newfoundland, Canada. 1899. #1:/Walcott Collection/wcd0582a ID. Walcott, C.D. 582a Signal Hill Sandstone, south side of entrance to St. Johns Harbor. Newfoundland, Canada. 1899. #1:/Walcott Collection/wcd0582b ID. Walcott, C.D. 582b Signal Hill Sandstone, south side of entrance to St. Johns Harbor. Newfoundland, Canada. 1899. #1:/Walcott Collection/wcd00583 ID. Walcott, C.D. 583 Snap shot at whale, Random Sound, Trinity Bay. Newfoundland, Canada. 1899. #1:/Walcott Collection/wcd00584 ID. Walcott, C.D. 584 Quartz veins cutting the Signal Hill Sandstones, north shore near mouth of Random Sound, Trinity Bay. Newfoundland, Canada. 1899. #1:/Walcott Collection/wcd00585 ID. Walcott, C.D. 585 Fishermen hauling in cod net, Random Sound, Trinity Bay. Newfoundland, Canada. 1899. #1:/Walcott Collection/wcd00586 ID. Walcott, C.D. 586 Skiff "Young Stag" used by geological party about Trinity Bay. Newfoundland, Canada. June 1899. #1:/Walcott Collection/wcd00587 ID. Walcott, C.D. 587 Random Head in profile, Trinity Bay. Newfoundland, Canada. 1899. #1:/Walcott Collection/wcd00588 ID. Walcott, C.D. 588 Bluff Head, Smith Sound, Trinity Bay. Newfoundland, Canada. 1899. #1:/Walcott Collection/wcd0588a ID. Walcott, C.D. 588a Bluff Head, Smith Sound, Trinity Bay. Newfoundland, Canada. 1899. #1:/Walcott Collection/wcd00589 ID. Walcott, C.D. 589 Snap shot at fishermen's houses, near Rocky Brook, Smith Sound, Trinity Bay. Newfoundland, Canada. 1899. #1:/Walcott Collection/wcd0589a ID. Walcott, C.D. 589a Snap shot at fishermen's houses, near Rocky Brook, Smith Sound, Trinity Bay. Newfoundland, Canada. 1899. #1:/Walcott Collection/wcd00590 ID. Walcott, C.D. 590 Small iceberg (growler), Smith Sound, Trinity Bay. Newfoundland, Canada. 1899. #1:/Walcott Collection/wcd00591 ID. Walcott, C.D. 591 Currie roofing-slate quarries, Smith Sound, Trinity Bay. Newfoundland, Canada. 1899. #1:/Walcott Collection/wcd0591a ID. Walcott, C.D. 591a Currie roofing-slate quarries, Smith Sound, Trinity Bay. Newfoundland, Canada. 1899. #1:/Walcott Collection/wcd00593 ID. Walcott, C.D. 593 Random sandstone and shale, on White Rock Point, Smith Sound, Trinity Bay. Newfoundland, Canada. 1899. #1:/Walcott Collection/wcd0595a ID. Walcott, C.D. 595a Algonkian (Avalon) rocks, south of Shoal Harbor, Trinity Bay. Newfoundland, Canada. 1899. #1:/Walcott Collection/wcd00596 ID. Walcott, C.D. 596 Lower Cambrian limestones at Smith Point. Smith Sound, Trinity Bay. Newfoundland, Canada. 1899. #1:/Walcott Collection/wcd00597 ID. Walcott, C.D. 597 Nodular limestones of the Lower Cambrian, on east side of Smith Sound, Trinity Bay. Newfoundland, Canada. 1899. #1:/Walcott Collection/wcd0597a ID. Walcott, C.D. 597a Nodular limestones of the Lower Cambrian, on east side of Smith Sound, Trinity Bay. Newfoundland, Canada. 1899. #1:/Walcott Collection/wcd00598 ID. Walcott, C.D. 598 Surface of dike in Paradoxides shale, showing shrinkage cracks. East side of Chapple Arm, Trinity Bay. Newfoundland, Canada. 1899. #1:/Walcott Collection/wcd00599 ID. Walcott, C.D. 599 Section of dike and Paradoxides shales. East side of Chapple Arm, Trinity Bay. Newfoundland, Canada. 1899. #1:/Walcott Collection/wcd00600 ID. Walcott, C.D. 600 Large spherulites in dike on east side of Chapple Arm, Trinity Bay. Newfoundland, Canada. 1899. #1:/Walcott Collection/wcd00601 ID. Walcott, C.D. 601 Standing rock, west shore Random Sound, south of Clarenville. Newfoundland, Canada. 1899. #1:/Walcott Collection/wcd00602 ID. Walcott, C.D. 602 Wayside cross, 10 miles below Bic, on the St. Lawrence River. Quebec Province. Canada. 1899. #1:/Walcott Collection/wcd00603 ID. Walcott, C.D. 603 Village of Bic. Built on old terrace of the St. Lawrence River. Quebec Province. Canada. 1899. #1:/Walcott Collection/wcd0603a ID. Walcott, C.D. 603a Village of Bic. Built on old terrace of the St. Lawrence River. Quebec Province. Canada. 1899. #1:/Walcott Collection/wcd00604 ID. Walcott, C.D. 604 View of hill-slopes, 3 miles southwest of Bic. Old river terraces are shown by the slope of he fences. Quebec Province. Canada. 1899. #1:/Walcott Collection/wcd00605 ID. Walcott, C.D. 605 Characteristic French Canadian farmhouse, 3 miles southwest of Bic. Quebec Province. Canada. 1899. #1:/Walcott Collection/wcd00606 ID. Walcott, C.D. 606 French Canadian barn 3 miles southwest of Bic. Quebec Province. Canada. 1899. #1:/Walcott Collection/wcd00607 ID. Walcott, C.D. 607 French Canadian house of the better class, about 10 miles down the St. Lawrence from Bic. Quebec Province. Canada. 1899. #1:/Walcott Collection/wcd00608 ID. Walcott, C.D. 608 Cliff of conglomerate on the shore of the St. Lawrence River, 4 miles above Bic. Quebec Province. Canada. 1899. #1:/Walcott Collection/wcd00609 ID. Walcott, C.D. 609 Cliff of conglomerate just south of Bic Harbor. Quebec Province. Canada. 1899. #1:/Walcott Collection/wcd00610 ID. Walcott, C.D. 610 Bic conglomerate, Lower Ordovician, Bic Harbor Point. Quebec Province. Canada. 1899. #1:/Walcott Collection/wcd00611 ID. Walcott, C.D. 611 Large boulder of Cambrian (Interformational?) conglomerate imbedded in Bic Lower Ordovician conglomerate. Bic Harbor Point. Quebec Province. Canada. 1899. #1:/Walcott Collection/wcd00612 ID. Walcott, C.D. 612 Large boulder of Lower Cambrian formed of limestone and dark shale pebbles imbedded in a light colored limestone matrix. Bic Harbor Point. Quebec Province. Canada. 1899. #1:/Walcott Collection/wcd00613 ID. Walcott, C.D. 613 Bic conglomerate worn by the waves into hummocks and bollows, Bic Harbor Point. Quebec Province. Canada. 1899. #1:/Walcott Collection/wcd00614 ID. Walcott, C.D. 614 Surf breaking on the shore of Little Metis, Gulf of St. Lawrence. Quebec Province. Canada. 1899. #1:/Walcott Collection/wcd00615 ID. Walcott, C.D. 615 Shore of the Kennebecasis River, at the YMCA chalet. New Brunswick Province. Canada. 1899. #1:/Walcott Collection/wcd00616 ID. Walcott, C.D. 616 Large weathered boulder of Bic (Lower Ordovician) conglomerate resting on the beach, 2 miles below Bic Harbor Point. Quebec Province. Canada. 1899. #1:/Walcott Collection/wcd0616a ID. Walcott, C.D. 616a Large weathered boulder of Bic (Lower Ordovician) conglomerate resting on the beach, 2 miles below Bic Harbor Point. Quebec Province. Canada. 1899. #1:/Walcott Collection/wcd0616b ID. Walcott, C.D. 616b Large weathered boulder of Bic (Lower Ordovician) conglomerate resting on the beach, 2 miles below Bic Harbor Point. Quebec Province. Canada. 1899. #1:/Walcott Collection/wcd00617 ID. Walcott, C.D. 617 Rocky Beach, a little below Bic Harbor Point. The small boulders shows the effect of the packing under pressure of ice in the spring. Quebec Province. Canada. 1899. #1:/Walcott Collection/wcd00618 ID. Walcott, C.D. 618 Panoramic view from the village of Bic of the Harbor of Bic. Quebec Province. Canada. 1899. #1:/Walcott Collection/wcd0618a ID. Walcott, C.D. 618a Panoramic view from the village of Bic of the Harbor of Bic. Quebec Province. Canada. 1899. #1:/Walcott Collection/wcd0618b ID. Walcott, C.D. 618b Panoramic view from the village of Bic of the Harbor of Bic. Quebec Province. Canada. 1899. #1:/Walcott Collection/wcd0618c ID. Walcott, C.D. 618c Panoramic view from the village of Bic of the Harbor of Bic. Quebec Province. Canada. 1899. #1:/Walcott Collection/wcd0619a ID. Walcott, C.D. 619a View of the islands at the entrance of Bic Harbor, from Bic Harbor Point. Quebec Province. Canada. 1899. #1:/Walcott Collection/wcd00620 ID. Walcott, C.D. 620 Cliffs of Silurian and Carboniferous limestone, north side of Beaver Creek Canyon, two miles above Missouri River, northern portion Big Belt Mountains. Broadwater County, Montana. 1900. #1:/Walcott Collection/wcd00621 ID. Walcott, C.D. 621 Cliffs of Cambrian limestone. Two views, forming panorama. North side of Beaver Creek Canyon, 2 miles above Missouri River, northern portion Big Belt Mountains. Broadwater County, Montana. 1900. #1:/Walcott Collection/wcd0621a ID. Walcott, C.D. 621a Cliffs of Cambrian limestone. Two views, forming panorama. North side of Beaver Creek Canyon, 2 miles above Missouri River, northern portion Big Belt Mountains. Broadwater County, Montana. 1900. #1:/Walcott Collection/wcd00622 ID. Walcott, C.D. 622 Cambrian Flathead Sandstone near base of Cambrian, North side of Beaver Creek Canyon, 23 miles from Missouri River, northern portion Big Belt Mountains. Broadwater County, Montana. 1900. #1:/Walcott Collection/wcd00623 ID. Walcott, C.D. 623 East front of Rocky Mountains, between north fork of Darborn River, and south fork of Sun River, as seen from the high foothills on the east, 5 photos form a panoramic view. Lewis and Clark County, Montana. 1900. #1:/Walcott Collection/wcd0623a ID. Walcott, C.D. 623a East front of Rocky Mountains, between north fork of Darborn River, and south fork of Sun River, as seen from the high foothills on the east, 5 photos form a panoramic view. Lewis and Clark County, Montana. 1900. #1:/Walcott Collection/wcd0623b ID. Walcott, C.D. 623b East front of Rocky Mountains, between north fork of Darborn River, and south fork of Sun River, as seen from the high foothills on the east, 5 photos form a panoramic view. Lewis and Clark County, Montana. 1900. #1:/Walcott Collection/wcd0623c ID. Walcott, C.D. 623c East front of Rocky Mountains, between north fork of Darborn River, and south fork of Sun River, as seen from the high foothills on the east, 5 photos form a panoramic view. Lewis and Clark County, Montana. 1900. #1:/Walcott Collection/wcd0623d ID. Walcott, C.D. 623d East front of Rocky Mountains, between north fork of Darborn River, and south fork of Sun River, as seen from the high foothills on the east, 5 photos form a panoramic view. Lewis and Clark County, Montana. 1900. #1:/Walcott Collection/wcd00624 ID. Walcott, C.D. 624 Cliffs of Cambrian limestone capped by Carboniferous. North side of Lewis and Clark Pass, 3 photos form a panoramic view. Lewis and Clark County, Montana. 1900. #1:/Walcott Collection/wcd0624a ID. Walcott, C.D. 624a Cliffs of Cambrian limestone capped by Carboniferous. North side of Lewis and Clark Pass, 3 photos form a panoramic view. Lewis and Clark County, Montana. 1900. #1:/Walcott Collection/wcd0624b ID. Walcott, C.D. 624b Cliffs of Cambrian limestone capped by Carboniferous limestone. North side of Lewis and Clark Pass, 3 photos form a panoramic view. Lewis and Clark County, Montana. 1900. #1:/Walcott Collection/wcd00625 ID. Walcott, C.D. 625 Cambrian and Carboniferous limestone cliffs on south side of north fork of Dearborn River. Lewis and Clark County, Montana. 1900. #1:/Walcott Collection/wcd00626 ID. Walcott, C.D. 626 Box Canyon eroded in massive Cambrian limestone, north fork Dearborn River. Lewis and Clark County, Montana. 1900. #1:/Walcott Collection/wcd0626a ID. Walcott, C.D. 626a Box Canyon eroded in massive Cambrian limestone, north fork Dearborn River. Lewis and Clark County, Montana. 1900. #1:/Walcott Collection/wcd00627 ID. Walcott, C.D. 627 Terrances 4 miles west of Stearn's Post Office on branch of south fork of Dearborn River. Lewis and Clark County, Montana. 1900. #1:/Walcott Collection/wcd0627a ID. Walcott, C.D. 627a Terrances 4 miles west of Stearn's Post Office on branch of south fork of Dearborn River. Lewis and Clark County, Montana. 1900. #1:/Walcott Collection/wcd00628 ID. Walcott, C.D. 628 Upper terrace on Deep Creek, north of north fork of Sun River, on upturned Cretaceous rocks. Teton County, Montana. 1900. #1:/Walcott Collection/wcd00629 ID. Walcott, C.D. 629 Eroded, cross-bedded, Cretaceous sandstone, north of north fork of Sun River, 1 mile east of Rocky Mountains front. Teton County, Montana. 1900. #1:/Walcott Collection/wcd0629a ID. Walcott, C.D. 629a Eroded, cross-bedded, Cretaceous sandstone, north of north fork of Sun River, 1 mile east of Rocky Mountains front. Teton County, Montana. 1900. #1:/Walcott Collection/wcd00630 ID. Walcott, C.D. 630 Sawtooth Mountains, from Haystack Butte, east front of Rocky Mountains, south of north fork of Sun River. Teton County, Montana. 1900. #1:/Walcott Collection/wcd00631 ID. Walcott, C.D. 631 Haystack Butte, 2 miles distant, south of north fork of Sun River. Teton County, Montana. 1900. #1:/Walcott Collection/wcd00633 ID. Walcott, C.D. 633 Hills capped with Tertiary (?) conglomerate on east side of Montour Creek, 6 miles northeast of Ovando. Powell County, Montana. 1900. #1:/Walcott Collection/wcd0633a ID. Walcott, C.D. 633a Hills capped with Tertiary (?) conglomerate on east side of Montour Creek, 6 miles northeast of Ovando. Powell County, Montana. 1900. #1:/Walcott Collection/wcd00634 ID. Walcott, C.D. 634 Small glacial lakes and hills of drift, Big Blackfoot Valley, 4 miles west of Ovando. Powell County, Montana. 1900. #1:/Walcott Collection/wcd00635 ID. Walcott, C.D. 635 Hills of drift, Big Blackfoot Valley, 4 miles west of Ovando. Powell County, Montana. 1900. #1:/Walcott Collection/wcd00636 ID. Walcott, C.D. 636 Glacial lakes, east side of Swan River Range, north of Holland Peak. Lewis and Clarke Forest Reserve. Missoula County, Montana. 1900. #1:/Walcott Collection/wcd00637 ID. Walcott, C.D. 637 Elbow Lake, near head of Swan River, east foot of Mission Range. Lewis and Clarke Forest Reserve. Missoula County, Montana. 1900. #1:/Walcott Collection/wcd00638 ID. Walcott, C.D. 638 Swan Range from Holland's ranch, on Swan River. Lewis and Clarke Forest Reserve. Missoula County, Montana. 1900. #1:/Walcott Collection/wcd00639 ID. Walcott, C.D. 639 Swan River Range from Pierre Ranch, 10 miles northwest of Ovando. Powell County, Montana. 1900. #1:/Walcott Collection/wcd00640 ID. Walcott, C.D. 640 Glacial topography of Big Blackfoot Valley, west-south-west of Ovando. Powell County, Montana. 1900. #1:/Walcott Collection/wcd00641 ID. Walcott, C.D. 641 Drumlins and lakes, 3 miles west northwest of Ovando, west of Montour Creek. Powell County, Montana. 1900. #1:/Walcott Collection/wcd0641a ID. Walcott, C.D. 641a Drumlins and lakes, 3 miles west northwest of Ovando, west of Montour Creek. Powell County, Montana. 1900. #1:/Walcott Collection/wcd0641c ID. Walcott, C.D. 641c Drumlins and lakes, 3 miles west northwest of Ovando, west of Montour Creek. Powell County, Montana. 1900. #1:/Walcott Collection/wcd00642 ID. Walcott, C.D. 642 Cliffs of massive Carboniferous limestone, with burned forest at base. South side of Beaver Creek Canyon, 2 miles above Missouri River, northern portion Big Belt Mountains. Broadwater County, Montana. 1900. #1:/Walcott Collection/wcd00643 ID. Walcott, C.D. 643 Massive Carboniferous limestone, showing effects of weathering, Beaver Creek Canyon, 2 miles above Missouri River, northern portion Big Belt Mountains. Broadwater County, Montana. 1900. #1:/Walcott Collection/wcd0643a ID. Walcott, C.D. 643a Massive Carboniferous limestone, showing effects of weathering, Beaver Creek Canyon, 2 miles above Missouri River, northern portion Big Belt Mountains. Broadwater County, Montana. 1900. #1:/Walcott Collection/wcd0643b ID. Walcott, C.D. 643b Massive Carboniferous limestone, showing effects of weathering, Beaver Creek Canyon, 2 miles above Missouri River, northern portion Big Belt Mountains. Broadwater County, Montana. 1900. #1:/Walcott Collection/wcd00644 ID. Walcott, C.D. 644 Bedded Carboniferous limestone on Soup Creek, 1/4 mile above Radford's Ranch, 6 miles from Missouri River, Big Belt Mountains. Lewis and Clark County, Montana. 1900. #1:/Walcott Collection/wcd00645 ID. Walcott, C.D. 645 Panoramic view of the northern part of the Big Belt Mountains, at head of Beaver Creek, about 10 miles from Missouri River. Lewis and Clark County, Montana. 1900. #1:/Walcott Collection/wcd0645a ID. Walcott, C.D. 645a Panoramic view of the northern part of the Big Belt Mountains, at head of Beaver Creek, about 10 miles from Missouri River. Lewis and Clark County, Montana. 1900. #1:/Walcott Collection/wcd00646 ID. Walcott, C.D. 646 Pinnacle of carboniferous sandstone, south side of Beaver Creek Canyon, three miles above Missouri River, northern portion Big Belt Mountains. Broadwater County, Montana. 1900. #1:/Walcott Collection/wcd00647 ID. Walcott, C.D. 647 Thin-bedded Low Carboniferous limestone, Beaver Creek Canyon, 3 miles above Missouri River, northern portion Big Belt Mountains. Broadwater County, Montana. 1900. #1:/Walcott Collection/wcd00648 ID. Walcott, C.D. 648 Cambrian limestone, north side of Beaver Creek Canyon, 4 miles above Missouri River, northern portion Big Belt Mountains. Broadwater County, Montana. 1900. #1:/Walcott Collection/wcd0648a ID. Walcott, C.D. 648a Cambrian limestone, north side of Beaver Creek Canyon, 4 miles above Missouri River, northern portion Big Belt Mountains. Broadwater County, Montana. 1900. #1:/Walcott Collection/wcd00649 ID. Walcott, C.D. 649 Looking down Missouri River from mouth of Beaver Creek, northern portion of Big Belt Mountains. Broadwater County, Montana. 1900. #1:/Walcott Collection/wcd00650 ID. Walcott, C.D. 650 Cliffs of Carboniferous sandstone on west side of Missouri River, opposite mouth of Beaver Creek, northern portion Big Belt Mountains. Broadwater County, Montana. 1900. #1:/Walcott Collection/wcd00651 ID. Walcott, C.D. 651 Cliffs of basal beds of Flathead Cambrian Sandstone above Nelson's Ranch on Beaver Creek, northern portion Big Belt Mountains. Broadwater County, Montana. 1900. #1:/Walcott Collection/wcd00652 ID. Walcott, C.D. 652 Cliff of roughly bedded eruptive (andesitic ?) rock, 1 mile above Wolf Creek Post Office. Broadwater County, Montana. 1900. #1:/Walcott Collection/wcd00653 ID. Walcott, C.D. 653 Bedded andesitic breccias, about 2 miles above Wolf Creek on road to Stearn's Post Office. Lewis and Clark County, Montana. 1900. #1:/Walcott Collection/wcd00654 ID. Walcott, C.D. 654 Cliffs of banded arenaceous shales of Spokane Formation, Belt Terrane, Wolf Creek, 2 miles below Mitchell. Lewis and Clark County, Montana. 1900. #1:/Walcott Collection/wcd00655 ID. Walcott, C.D. 655 Ridges of eruptive rock with park-like areas between them, 10 miles north of wolf Creek. Lewis and Clark County, Montana. 1900. #1:/Walcott Collection/wcd00656 ID. Walcott, C.D. 656 Panoramic view of mountains and forests west and northwest of Lewis and Clark Pass on Rocky Mountain Divide. Lewis and Clark County, Montana. 1900. #1:/Walcott Collection/wcd0656a ID. Walcott, C.D. 656a Panoramic view of mountains and forests west and northwest of Lewis and Clark Pass on Rocky Mountain Divide. Lewis and Clark County, Montana. 1900. #1:/Walcott Collection/wcd0656b ID. Walcott, C.D. 656b Panoramic view of mountains and forests west and northwest of Lewis and Clark Pass on Rocky Mountain Divide. Lewis and Clark County, Montana. 1900. #1:/Walcott Collection/wcd0656c ID. Walcott, C.D. 656c Panoramic view of mountains and forests west and northwest of Lewis and Clark Pass on Rocky Mountain Divide. Lewis and Clark County, Montana. 1900. #1:/Walcott Collection/wcd0656d ID. Walcott, C.D. 656d Panoramic view of mountains and forests west and northwest of Lewis and Clark Pass on Rocky Mountain Divide. Lewis and Clark County, Montana. 1900. #1:/Walcott Collection/wcd0656e ID. Walcott, C.D. 656e Panoramic view of mountains and forests west and northwest of Lewis and Clark Pass on Rocky Mountain Divide. Lewis and Clark County, Montana. 1900. #1:/Walcott Collection/wcd0656f ID. Walcott, C.D. 656f Panoramic view of mountains and forests west and northwest of Lewis and Clark Pass on Rocky Mountain Divide. Lewis and Clark County, Montana. 1900. #1:/Walcott Collection/wcd00657 ID. Walcott, C.D. 657 Lower Paleozoic section in cliff, north side canyon, north fork Dearborn River. Lewis and Clark County, Montana. 1900. #1:/Walcott Collection/wcd0657b ID. Walcott, C.D. 657b Lower Paleozoic section in cliff, north side canyon, north fork Dearborn River. Lewis and Clark County, Montana. 1900. #1:/Walcott Collection/wcd00658 ID. Walcott, C.D. 658 Section showing the four limestone belts of the Cambrian Section, north side of canyon, north fork Dearborn River. Lewis and Clark County, Montana. 1900. #1:/Walcott Collection/wcd00659 ID. Walcott, C.D. 659 Carboniferous limestone cliff of Mt. Dearborn, north fork, Dearborn River. Lewis and Clark County, Montana. 1900. #1:/Walcott Collection/wcd0659a ID. Walcott, C.D. 659a Carboniferous limestone cliff of Mt. Dearborn, north fork, Dearborn River. Lewis and Clark County, Montana. 1900. #1:/Walcott Collection/wcd00660 ID. Walcott, C.D. 660 Looking west from summit of Mt. Dearborn toward Scapegoat Mountain, Lewis and Clark Forest Reserve. Lewis and Clark County, Montana. 1900. #1:/Walcott Collection/wcd00661 ID. Walcott, C.D. 661 Looking up valley of north fork of Dearborn River into Lewis and Clark Forest Reserve. Lewis and Clark County, Montana. 1900. #1:/Walcott Collection/wcd0661c ID. Walcott, C.D. 661c Looking up valley of north fork of Dearborn River into Lewis and Clark Forest Reserve. Lewis and Clark County, Montana. 1900. #1:/Walcott Collection/wcd00662 ID. Walcott, C.D. 662 Terraces on Deep Creek, about 8 miles from base of mountains. First terrace 30 feet; second terrace, 100 feet, and third a strongly marked terrace about 250 feet above creek. Teton County, Montana. 1900. #1:/Walcott Collection/wcd0662a ID. Walcott, C.D. 662a Terraces on Deep Creek, about 8 miles from base of mountains. First terrace 30 feet; second terrace, 100 feet, and third a strongly marked terrace about 250 feet above creek. Teton County, Montana. 1900. #1:/Walcott Collection/wcd00663 ID. Walcott, C.D. 663 Limestone cliff north side mouth of canyon of north fork of Sun River. Teton County, Montana. 1900. #1:/Walcott Collection/wcd0663a ID. Walcott, C.D. 663a Limestone cliff north side mouth of canyon of north fork of Sun River. Teton County, Montana. 1900. #1:/Walcott Collection/wcd00664 ID. Walcott, C.D. 664 Terraces on Deep Creek, just east of the Rocky Mountains front. Teton County, Montana. 1900. #1:/Walcott Collection/wcd00665 ID. Walcott, C.D. 665 Limestone cliffs and hills north of White's sawmill on Smith Creek, east front of Rocky Mountains. Lewis and Clark County, Montana. 1900. #1:/Walcott Collection/wcd00666 ID. Walcott, C.D. 666 Sawtooth Mountains, north of Haystack Butte, east front of Rocky Mountains. Lewis and Clark County, Montana. 1900. #1:/Walcott Collection/wcd00667 ID. Walcott, C.D. 667 Terraces on south side of canyon of north fork of Dearborn River, at Walker's Ranch. Lewis and Clark County, Montana. 1900. #1:/Walcott Collection/wcd00668 ID. Walcott, C.D. 668 An eroded volcanic neck. Haystack Butte from the southwest. Lewis and Clark County, Montana. 1900. #1:/Walcott Collection/wcd00669 ID. Walcott, C.D. 669 An eroded volcanic neck. Haystack Butte from the north. Lewis and Clark County, Montana. 1900. #1:/Walcott Collection/wcd0669a ID. Walcott, C.D. 669a An eroded volcanic neck. Haystack Butte from the north. Lewis and Clark County, Montana. 1900. #1:/Walcott Collection/wcd00670 ID. Walcott, C.D. 670 Haystack Butte from the east, with hay ranch in foreground. Lewis and Clark County, Montana. 1900. #1:/Walcott Collection/wcd0670a ID. Walcott, C.D. 670a Haystack Butte from the east, with hay ranch in foreground. Lewis and Clark County, Montana. 1900. #1:/Walcott Collection/wcd00671 ID. Walcott, C.D. 671 Terraces on south fork of Sun River, looking east from Haystack Butte. Lewis and Clark County, Montana. 1900. #1:/Walcott Collection/wcd00672 ID. Walcott, C.D. 672 East side of Mission Range, north of Mt. McDonald, 6,800 feet. Missoula County, Montana. 1900. #1:/Walcott Collection/wcd0672a ID. Walcott, C.D. 672a East side of Mission Range, north of Mt. McDonald, 6,800 feet. Missoula County, Montana. 1900. #1:/Walcott Collection/wcd00673 ID. Walcott, C.D. 673 Mt. McDonald from the east, Mission Range. Missoula County, Montana. 1900. #1:/Walcott Collection/wcd00674 ID. Walcott, C.D. 674 Glaciers on Mission Range, southeast of Mt. McDonald. Missoula County, Montana. 1900. #1:/Walcott Collection/wcd00675 ID. Walcott, C.D. 675 Mission range, in vicinity of Mt. McDonald. View taken from ridge on north head of Swan River, 6,900 feet. Lake County, Montana. 1900. #1:/Walcott Collection/wcd0675a ID. Walcott, C.D. 675a Mission range, in vicinity of Mt. McDonald. View taken from ridge on north head of Swan River, 6,900 feet. Lake County, Montana. 1900. #1:/Walcott Collection/wcd0675b ID. Walcott, C.D. 675b Mission range, in vicinity of Mt. McDonald. View taken from ridge on north head of Swan River, 6,900 feet. Lake County, Montana. 1900. #1:/Walcott Collection/wcd00676 ID. Walcott, C.D. 676 Glacial drift. Ovando Hills, west of Ovando. Powell County, Montana. 1900. #1:/Walcott Collection/wcd00677 ID. Walcott, C.D. 677 No Caption. #1:/Walcott Collection/wcd0677a ID. Walcott, C.D. 677a No Caption. #1:/Walcott Collection/wcd0677b ID. Walcott, C.D. 677bc No Caption. #1:/Walcott Collection/wcd00678 ID. Walcott, C.D. 678 No Caption. #1:/Walcott Collection/wcd00679 ID. Walcott, C.D. 679 No Caption. #1:/Walcott Collection/wcd0682a ID. Walcott, C.D. 682a Panoramic view of Middle Cambrian shales and limestones southeast and east of Antelope Springs, House Range. Millard County, Utah. 1903. #1:/Walcott Collection/wcd0682b ID. Walcott, C.D. 682b Panoramic view of Middle Cambrian shales and limestones southeast and east of Antelope Springs, House Range. Millard County, Utah. 1903. #1:/Walcott Collection/wcd0682c ID. Walcott, C.D. 682c Panoramic view of Middle Cambrian shales and limestones southeast and east of Antelope Springs, House Range. Millard County, Utah. 1903. #1:/Walcott Collection/wcd00683 ID. Walcott, C.D. 683 Panoramic view of House Range, from 14 miles west. Millard County, Utah. 1903. #1:/Walcott Collection/wcd0683a ID. Walcott, C.D. 683a Panoramic view of House Range, from 14 miles west. Millard County, Utah. 1903. #1:/Walcott Collection/wcd0683b ID. Walcott, C.D. 683b Panoramic view of House Range, from 14 miles west. Millard County, Utah. 1903. #1:/Walcott Collection/wcd0683c ID. Walcott, C.D. 683c Panoramic view of House Range, from 14 miles west. Millard County, Utah. 1903. #1:/Walcott Collection/wcd00684 ID. Walcott, C.D. 684 West face of House Range. "Mollie's Nipple" is the highest point. Lower Cambrian quartzite at base with Middle Cambrian limestone above. Millard County, Utah. 1903. #1:/Walcott Collection/wcd00685 ID. Walcott, C.D. 685 Granite Peak from the west, south of Marjum Pass, House Range. Millard County, Utah. 1903. #1:/Walcott Collection/wcd00686 ID. Walcott, C.D. 686 House range, south of Marjum Pass. Millard County, Utah. 1903. #1:/Walcott Collection/wcd00687 ID. Walcott, C.D. 687 Cambrian quartzites with superjacent limestones, near mouth of Death Canyon, House Range. Millard County, Utah. 1903. #1:/Walcott Collection/wcd00688 ID. Walcott, C.D. 688 Looking across White Valley to House Range. Millard County, Utah. 1903. #1:/Walcott Collection/wcd00689 ID. Walcott, C.D. 689 Cambrian limestone cliff. Death Canyon, House Range. Millard County, Utah. 1903. #1:/Walcott Collection/wcd00690 ID. Walcott, C.D. 690 Banded siliceous limestones of Middle Cambrian terrance, Death Canyon, House Range. Millard County, Utah. 1903. #1:/Walcott Collection/wcd00691 ID. Walcott, C.D. 691 Typical form of erosion of siliceous Middle Cambrian limestones of House Range. Butte is in Death Canyon. Millard County, Utah. 1903. #1:/Utah-Images/wcd00692 ID. Walcott, C.D. 692 U.S. Geological Survey party near the House Range, north of Dome Pass, buggy, dog, and wagon, traveling, Millard County, Utah. 1903. Lower left photo page 16, Images of the U.S. Geological Survey, 1879-1979. #1:/Utah-Images/wcd0692a ID. Walcott, C.D. 692a U.S. Geological Survey party near the House Range, north of Dome Pass, buggy, dog, and wagon, traveling. Millard County, Utah. 1903. #1:/Walcott Collection/wcd00693 ID. Walcott, C.D. 693 Looking into the heart of Uinta Mountains, from head of Weber River. Summit County, Utah. 1903. #1:/Walcott Collection/wcd0693a ID. Walcott, C.D. 693a Looking into the heart of Uinta Mountains, from head of Weber River. Summit County, Utah. 1903. #1:/Walcott Collection/wcd0693b ID. Walcott, C.D. 693b Looking into the heart of Uinta Mountains, from head of Weber River. Summit County, Utah. 1903. #1:/Walcott Collection/wcd0693c ID. Walcott, C.D. 693c Looking into the heart of Uinta Mountains, from head of Weber River. Summit County, Utah. 1903. #1:/Walcott Collection/wcd00694 ID. Walcott, C.D. 694 South end of Great Salt Lake desert from the southwest of Simpson Range. Tootle County, Utah. 1903. #1:/Walcott Collection/wcd0694a ID. Walcott, C.D. 694a South end of Great Salt Lake desert from the southwest of Simpson Range. Tootle County, Utah. 1903. #1:/Walcott Collection/wcd00695 ID. Walcott, C.D. 695 Bald Mountain and Reids Peak, looking from the north. Uinta Mountains. Summit County, Utah. 1903. #1:/Walcott Collection/wcd00696 ID. Walcott, C.D. 696 Mt. Agassiz looking from the northwest. Uinta Mountains. Summit County, Utah. 1903. #1:/Walcott Collection/wcd00697 ID. Walcott, C.D. 697 Wheeler Peak (12,086 feet), Snake Range. White Pine County, Nevada. 1903. #1:/Walcott Collection/wcd00698 ID. Walcott, C.D. 698 Wheeler Peak (12,086 feet), Snake Range. After a storm. White Pine County, Nevada. 1903. #1:/Walcott Collection/wcd0698a ID. Walcott, C.D. 698a Wheeler Peak (12,086 feet), Snake Range. After a storm. White Pine County, Nevada. 1903. #1:/Walcott Collection/wcd00699 ID. Walcott, C.D. 699 Sevier Lake, looking from the west. Millard County, Utah. 1903. #1:/Walcott Collection/wcd00700 ID. Walcott, C.D. 700 Panoramic view of Mt. Moriah, Snake Range, north of Sacramento Pass. White Pine County, Nevada. 1903. #1:/Walcott Collection/wcd0700a ID. Walcott, C.D. 700a Panoramic view of Mt. Moriah, Snake Range, north of Sacramento Pass. White Pine County, Nevada. 1903. #1:/Walcott Collection/wcd0700b ID. Walcott, C.D. 700b Panoramic view of Mt. Moriah, Snake Range, north of Sacramento Pass. White Pine County, Nevada. 1903. #1:/Walcott Collection/wcd00701 ID. Walcott, C.D. 701 Mt. Moriah, Snake Range. White Pine County, Nevada. 1903. #1:/Walcott Collection/wcd00702 ID. Walcott, C.D. 702 Uinta Forest Reserve. Headwaters of east branch of Weber River. Summit County, Utah. 1903. #1:/Walcott Collection/wcd0702b ID. Walcott, C.D. 702b Uinta Forest Reserve. Headwaters of east branch of Weber River. Summit County, Utah. 1903. #1:/Walcott Collection/wcd00703 ID. Walcott, C.D. 703 Balanced quartzite boulder, resting on limestone. About 4 miles east of Sacramento Pass, Snake Range. White Pine County, Nevada. 1903. #1:/Walcott Collection/wcd0703a ID. Walcott, C.D. 703a Balanced quartzite boulder, resting on limestone. About 4 miles east of Sacramento Pass, Snake Range. White Pine County, Nevada. 1903. #1:/Walcott Collection/wcd00704 ID. Walcott, C.D. 704 White Algonkian quartzite, near head of main fork of Weber River, 5 miles south of Holiday Park. North slop of Uinta Mountains. Summit County, Utah. 1903. #1:/Walcott Collection/wcd0704a ID. Walcott, C.D. 704a White Algonkian quartzite, near head of main fork of Weber River, 5 miles south of Holiday Park. North slop of Uinta Mountains. Summit County, Utah. 1903. #1:/Walcott C.D. Collection/wcd00705 ID. Walcott, C.D. 705 Lake Bonneville terrace 5 miles north of Tooele, west side of Uqirr Mountain. Tooele County, Utah. 1903. #1:/Walcott Collection/wcd00706 ID. Walcott, C.D. 706 Siliceous limestone, Middle Cambrian limestone. Marjum Canyon, House Range. Millard County, Utah. 1903. #1:/Walcott Collection/wcd00707 ID. Walcott, C.D. 707 Algonkian quartzites near divide at head of Berry Canyon, in which main fork of Weber River rises. Uinta Mountains. Summit County, Utah. 1903. #1:/Walcott Collection/wcd0707a ID. Walcott, C.D. 707a Algonkian quartzites near divide at head of Berry Canyon, in which main fork of Weber River rises. Uinta Mountains. Summit County, Utah. 1903. #1:/Walcott Collection/wcd0707b ID. Walcott, C.D. 707b Algonkian quartzites near divide at head of Berry Canyon, in which main fork of Weber River rises. Uinta Mountains. Summit County, Utah. 1903. #1:/Walcott Collection/wcd00708 ID. Walcott, C.D. 708 West front of House Range, near mouth of Dome Canyon. Millard County, Utah. 1903. #1:/Walcott Collection/wcd00721 ID. Walcott, C.D. 721 Erosion of arenaceous and argillaceous shales about 10 miles southwest of Billings. Yellowstone County, Montana. 1901. #1:/Walcott Collection/wcd0721a ID. Walcott, C.D. 721a Erosion of arenaceous and argillaceous shales about 10 miles southwest of Billings. Yellowstone County, Montana. 1901. #1:/Walcott Collection/wcd0721b ID. Walcott, C.D. 721b Erosion of arenaceous and argillaceous shales about 10 miles southwest of Billings. Yellowstone County, Montana. 1901. #1:/Walcott Collection/wcd0721c ID. Walcott, C.D. 721c Erosion of arenaceous and argillaceous shales about 10 miles southwest of Billings. Yellowstone County, Montana. 1901. #1:/Walcott Collection/wcd0721d ID. Walcott, C.D. 721d Erosion of arenaceous and argillaceous shales about 10 miles southwest of Billings. Yellowstone County, Montana. 1901. #1:/Walcott Collection/wcd0721f ID. Walcott, C.D. 721f Erosion of arenaceous and argillaceous shales about 10 miles southwest of Billings. Yellowstone County, Montana. 1901. #1:/Walcott Collection/wcd0721g ID. Walcott, C.D. 721g Erosion of arenaceous and argillaceous shales about 10 miles southwest of Billings. Yellowstone County, Montana. 1901. #1:/Walcott Collection/wcd00722 ID. Walcott, C.D. 722 Swan Range. East slope, south of Holland Creek. Quartzitic, Algonkian sandstone. Lake County, Montana. July 1905. #1:/Walcott Collection/wcd00723 ID. Walcott, C.D. 723 Holland Peak, Swan Range, looking from the south. Peak is formed of Algonkian limestone. Missoula County, Montana. July 1905. #1:/Walcott Collection/wcd00724 ID. Walcott, C.D. 724 Holland Peak, Swan Range, west slope; joins photo #723. Missoula County, Montana. July 1905. #1:/Walcott Collection/wcd00725 ID. Walcott, C.D. 725 Survey field party with pack horses at wooden bridge, Buffalo Fork of the Snake River. Teton County, Wyoming. ca 1900. #1:/Walcott Collection/wcd00726 ID. Walcott, C.D. 726 Shoshone Falls on the Snake River. Twin Falls and Jerome Counties, Idaho. ca. 1903. #1:/Walcott Collection/wcd00727 ID. Walcott, C.D. 727 View along Snake River and bank below Twin Falls dam site. Twin Falls and Jerome Counties, Idaho. ca. 1903. #1:/Walcott Collection/wcd00728 ID. Walcott, C.D. 728 Field party of men relaxing and horses grazing, head of Gray Bull river, east side of summit of Shoshone Mountains. Park County, Wyoming. 1903. #1:/Walcott Collection/wcd00729 ID. Walcott, C.D. 729 Snowball fight; horses grazing and some men relaxing in background. Head of Gray Bull river, east side of summit of Shoshone Mountains. Park County, Wyoming. August 5, 1903. #1:/Walcott Collection/wcd00730 ID. Walcott, C.D. 730 Twin Falls on the Snake River. Twin Falls and Jerome Counties, Idaho. ca. 1903. #1:/Walcott Collection/wcd00731 ID. Walcott, C.D. 731 Wiggins Creek, head of the Wind River. Mountains in distance. Fremonth County, Wyoming. ca. 1903. #1:/Walcott Collection/wcd00732 ID. Walcott, C.D. 732 View along Wiggins Creek, head of the Wind River. Fremonth County, Wyoming. ca. 1903. #1:/Walcott Collection/wcd00733 ID. Walcott, C.D. 733 Blue Lakes, Snake River. Lake in foreground. Idaho. ca 1903. #1:/Walcott Collection/wcd00734 ID. Walcott, C.D. 734 Horses grazing, head of Wiggins Creek, head of the Wind River. Fremont County, Wyoming. ca. 1903. #1:/Walcott Collection/wcd00735 ID. Walcott, C.D. 735 View of massive weathered rock exposure, head of Wigins Creek, head of the Wind River. Fremont County, Wyoming. ca. 1903. #1:/Walcott Collection/wcd00736 ID. Walcott, C.D. 736 Field part and pack train crossing wooden bridge over Buffalo Fork of Snake River. (Also see C.D. Walcott photo #725). Teton County, Wyoming. 1903. #1:/Walcott Collection/wcd00737 ID. Walcott, C.D. 737 Profile of Shoshone Mountains from the south side, looking up Wiggins Creek. Creek is visible at left, head of the Wind River. Fremont County, Wyoming. 1903. #1:/Walcott Collection/wcd00738 ID. Walcott, C.D. 738 Profile of Shoshone Mountains from the south side near Wiggins Creek. Fremont County, Wyoming. 1903. #1:/Grand Teton National Park/wcd00739 ID. Walcott, C.D. 739 Grand Teton National Park, Wyoming. Teton Mountains. Grand Teton is to the left of center. Jenny Lake is at the foot of the Grand Teton. The plains are in the foreground. Jackson Lake would be at the right end of this view. View is west. Teton County, Wyoming. 1903. #1:/Walcott Collection/wcd00740 ID. Walcott, C.D. 740 View of Shoshone Mountains, looking up Wind River (river not in view). Fremont County, Wyoming. 1903. #1:/Walcott Collection/wcd00741 ID. Walcott, C.D. 741 A different view of Shoshone Mountains, looking up Wind River (river not in view). Fremont County, Wyoming. 1903. #1:/Walcott Collection/wcd00742 ID. Walcott, C.D. 742 Teton Valley, looking up towards Victor. Teton County, Idaho. 1903. #1:/Walcott Collection/wcd00743 ID. Walcott, C.D. 743 Members of field party lounging around the campfile, on Buffalo Fork, Snake River. Teton County, Idaho. 1903. #1:/Walcott Collection/wcd00744 ID. Walcott, C.D. 744 Mr. Charles D. Walcott on horse, Mr. F. H. Newell standing at right. Other horses and log cabin in background. On Buffalo Fork, Snake River. Teton County, Idaho. 1903. #1:/Grand Teton National Park/wcd00745 ID. Walcott, C.D. 745 Grand Teton National Park, Wyoming. Jackson Lake with the Teton Mountains in the background. Canvas-covered wagon in the foreground. Site is proposed reservoir for Snake River Valley. 1903. #1:/Grand Teton National Park/wcd00746 ID. Walcott, C.D. 746 Grand Teton National Park, Wyoming. Teton Mountains with Jenny Lake in the foreground. Teton County, Idaho. 1903. #1:/Grand Teton National Park/wcd00747 ID. Walcott, C.D. 747 Grand Teton National Park. Men fishing in Jenny Lake, proposed reservoir for Snake River Valley. Teton County, Idaho. 1903. #1:/Grand Teton National Park/wcd00748 ID. Walcott, C.D. 748 Grand Teton National Park. Panoramic view showing Two Ocean lake at left, Emma Matilda lake at right; 2 men in right foreground, forests. These lakes are proposed reservoirs for Snake River Valley. Teton County, Idaho. 1903. #1:/Grand Teton National Park/wcd00749 ID. Walcott, C.D. 749 Grand Teton National Park, Wyoming. Proposed reservoir dam site at the outlet of Emma Matilda Lake. 1903. Teton County, Idaho. 1903. #1:/Grand Teton National Park/wcd00750 ID. Walcott, C.D. 750 Grand Teton National Park, Wyoming. Three men lounging in the foreground. Emma Matilda Lake in the background beyond the trees. 1903. Teton County, Idaho. 1903. #1:/Walcott Collection/wcd00751 ID. Walcott, C.D. 751 Minidoka dam site, looking down the Snake River. Diamond drill at work at left - rig visible is distance. Minidoka and Cassia Counties, Idaho. 1903. #1:/Grand Teton National Park/wcd00752 ID. Walcott, C.D. 752 Grand Teton National Park, Wyoming. Camp scene near the outlet of Jackson Lake. The peak with snow at the right (just visible) is Mount Moran. 1903. #1:/Grand Teton National Park/wcd00753 ID. Walcott, C.D. 753 Grand Teton National Park. View of Jackson Lake with Mt. Moran at left - by moonlight. Teton County, Wyoming. 1903. #1:/Walcott Collection/wcd00754 ID. Walcott, C.D. 754 Construction at south channel, Twin Falls dam site, Snake River. Twin Falls and Jerome Counties, Idaho. 1903. #1:/Grand Teton National Park/wcd00755 ID. Walcott, C.D. 755 Grand Teton National Park. Grand Teton - forest in foregound. Teton County, Wyoming. 1903. #1:/Grand Teton National Park/wcd00756 ID. Walcott, C.D. 756 Grand Teton National Park, Wyoming. Jenny Lake and part of the shore and forest. 1903. #1:/Walcott Collection/wcd00757 ID. Walcott, C.D. 757 Diamond drill outfit at Minidoka dam site, men, boiler, other equipment. Snake River in background. Minidoka and Cassia Counties, Idaho. 1903. #1:/Walcott Collection/wcd00758 ID. Walcott, C.D. 758 Minidoka dam site, Snake River. Minidoka and Cassia Counties, Idaho. 1903. #1:/Walcott Collection/wcd00759 ID. Walcott, C.D. 759 Twin Falls Dam under construction; company quarters building and wooden water tower at upper right. Minidoka and Cassia Counties, Idaho. 1903. #1:/Wegemann C.H. Collection-Union Fuel Company/wch00180 ID. Wegemann, C.H. 180 Union Fuel Company's mine on Grass Creek, Utah, Sec. 18, T. 3 N., R. 6 E., looking east. San Miguel County, Colorado n.d. #1:/Lincoln Memorial/wck00271 ID. Wentworth, C.K. 271 Lincoln Memorial, Washington, District of Columbia. Test of panchromatic plate with red filter, exposed twelve seconds at f-stop 256. Taken from the roof of the middle wing of the Department of Interior Building. June 1921. #1:/Harpers Ferry National Historic Park/wck00377 ID. Wentworth, C.K. 377 Harpers Ferry National Historic Park, West Virginia. Harpers Ferry gap, viewed from the west. July 1921. #1:/Alaska Glaciers/wcw00028 ID. Wright, C.W. 28 Alaska Glaciers. Mendenhall Glacier, which is northwest of Juneau in the Coast Mountains, looking east from bridge. 1903. #1:/Alaska Glaciers/wcw00030 ID. Wright, C.W. 30 Alaska Glaciers. Terminus of Taku Glacier, which is northeast of Juneau in the Coast Mountains. May 1904. #1:/Alaska Glaciers/wcw00031 ID. Wright, C.W. 31 Alaska Glaciers. Terminus of Taku Glacier, which is northeast of Juneau in the Coast Mountains, viewed from Windom Glacier (Norris Glacier) outwash plain. May 1904. #1:/Alaska Glaciers/wcw00035 ID. Wright, C.W. 35 Alaska Glaciers. Popof Glacier, which is northwest of Wrangell in the Coast Mountains, viewed from the Stikine River. Schist belt in upper right. 1903. #1:/Alaska Glaciers/wcw00126 ID. Wright, C.W. 126 Alaska Glaciers. Nelson Glacier, 14 miles east of Wrangell in the Coast Mountains. 1903. #1:/Alaska Glaciers/wcw00127 ID. Wright, C.W. 127 Alaska Glaciers. Nelson Glacier, 14 miles east of Wrangell in the Coast Mountains. Pre-1905. #1:/Glacier Bay National Park and Preserve/wcw00320 ID. Wright, C.W. 320 Glacier Bay National Park and Preserve, Alaska. Southeast Bay off Geikie Inlet. 1906. #1:/Glacier Bay National Park and Preserve/wcw00321 ID. Wright, C.W. 321 Glacier Bay National Park and Preserve, Alaska. Geikie Glacier at Geikie Inlet. 1906. #1:/Glacier Bay National Park and Preserve/wcw00322 ID. Wright, C.W. 322 Glacier Bay National Park and Preserve, Alaska. Distorted sand deposit on the north side of Geikie Inlet near Favorite Glacier. 1906. #1:/Glacier Bay National Park and Preserve/wcw00323 ID. Wright, C.W. 323 Glacier Bay National Park and Preserve, Alaska. Geikie Glacier at Geike Inlet. 1906. #1:/Glacier Bay National Park and Preserve/wcw00324 ID. Wright, C.W. 324 Glacier Bay National Park and Preserve, Alaska. Sand deposits near Favorite Glacier on the north side of Geikie Inlet. 1906. #1:/Glacier Bay National Park and Preserve/wcw00325 ID. Wright, C.W. 325 Glacier Bay National Park and Preserve, Alaska. Second Bay on the south side of Geikie Inlet. 1906. #1:/Glacier Bay National Park and Preserve/wcw00327 ID. Wright, C.W. 327 Glacier Bay National Park and Preserve, Alaska. Terminus of Charpentier Glacier. 1906. #1:/Glacier Bay National Park and Preserve/wcw00329 ID. Wright, C.W. 329 Glacier Bay National Park and Preserve, Alaska. Tributary to Hugh Miller Glacier. 1906. #1:/Glacier Bay National Park and Preserve/wcw00333 ID. Wright, C.W. 333 Glacier Bay National Park and Preserve, Alaska. Terminus of Carroll Glacier, viewed from Triangle Island in Queen Inlet. 1906. See Photo No. mbf00003 for matching pair. #1:/Glacier Bay National Park and Preserve/wcw00334 ID. Wright, C.W. 334 Glacier Bay National Park and Preserve, Alaska. Receding glacier in a gulch on the east side of Queen Inlet. 1906. #1:/Glacier Bay National Park and Preserve/wcw00336 ID. Wright, C.W. 336 Glacier Bay National Park and Preserve, Alaska. Granite-intruding chert beds on Queen Inlet. 1906. #1:/Glacier Bay National Park and Preserve/wcw00337 ID. Wright, C.W. 337 Glacier Bay National Park and Preserve, Alaska. Queen Inlet, viewed from Hugh Miller Glacier. 1906. #1:/Glacier Bay National Park and Preserve/wcw00338 ID. Wright, C.W. 338 Glacier Bay National Park and Preserve, Alaska. Camp Muir at Glacier Bay. 1906. #1:/Glacier Bay National Park and Preserve/wcw00339 ID. Wright, C.W. 339 Glacier Bay National Park and Preserve, Alaska. Faulting in schist on Garforth Island in Muir Inlet. 1906. #1:/Glacier Bay National Park and Preserve/wcw00340 ID. Wright, C.W. 340 Glacier Bay National Park and Preserve, Alaska. Brooks Bay(?)on Muir Inlet. 1906. #1:/Glacier Bay National Park and Preserve/wcw00341 ID. Wright, C.W. 341 Glacier Bay National Park and Preserve, Alaska. La Perouse Glacier, northwest of Icy Cape (Point). 1906. #1:/Glacier Bay National Park and Preserve/wcw00343 ID. Wright, C.W. 343 Glacier Bay National Park and Preserve, Alaska. Finger Glacier(?), southeast of La Perouse Glacier on the Pacific Coast. 1906. #1:/Glacier Bay National Park and Preserve/wcw00344 ID. Wright, C.W. 344 Glacier Bay National Park and Preserve, Alaska. La Perouse Glacier, southeast of Lituya Bay. 1906. #1:/Glacier Bay National Park and Preserve/wcw00351 ID. Wright, C.W. 351 Glacier Bay National Park and Preserve, Alaska. Morse Glacier, viewed from the east side of Muir Inlet. 1906. #1:/Glacier Bay National Park and Preserve/wcw00354 ID. Wright, C.W. 354 Glacier Bay National Park and Preserve, Alaska. Terminus of Morse Glacier. 1906. #1:/Glacier Bay National Park and Preserve/wcw00358 ID. Wright, C.W. 358 Glacier Bay National Park and Preserve, Alaska. Part of Muir Glacier(?). Stagnant ice melting down near station H on Glacier Bay. 1906. #1:/Glacier Bay National Park and Preserve/wcw00361 ID. Wright, C.W. 361 Glacier Bay National Park and Preserve, Alaska. Part of Muir Glacier, viewed from station H. 1906. #1:/Glacier Bay National Park and Preserve/wcw00362 ID. Wright, C.W. 362 Glacier Bay National Park and Preserve, Alaska. Part of Morse Glacier, Cushing Plateau, viewed from station G. at Muir Inlet. August 8, 1906. #1:/Glacier Bay National Park and Preserve/wcw00363 ID. Wright, C.W. 363 Glacier Bay National Park and Preserve, Alaska. Part of Muir Glacier, viewed from Nunatak. 1906. #1:/Glacier Bay National Park and Preserve/wcw00366 ID. Wright, C.W. 366 Glacier Bay National Park and Preserve, Alaska. Uncovered forest near Morse Glacier. 1906. #1:/Glacier Bay National Park and Preserve/wcw00367 ID. Wright, C.W. 367 Glacier Bay National Park and Preserve, Alaska. Part of the terminus of Muir Glacier at Muir Inlet. August 11, 1906. #1:/Glacier Bay National Park and Preserve/wcw00368 ID. Wright, C.W. 368 Glacier Bay National Park and Preserve, Alaska. Part of Muir Glacier. August 14, 1906. #1:/Glacier Bay National Park and Preserve/wcw00372 ID. Wright, C.W. 372 Glacier Bay National Park and Preserve, Alaska. Uncovered tree stumps near Morse Glacier near station 28. August 8, 1906. #1:/Glacier Bay National Park and Preserve/wcw00373 ID. Wright, C.W. 373 Glacier Bay National Park and Preserve, Alaska. Part of Hugh Miller Glacier. July 1906. #1:/Glacier Bay National Park and Preserve/wcw00374 ID. Wright, C.W. 374 Glacier Bay National Park and Preserve, Alaska. Part of Muir Glacier at Muir Inlet. August 11, 1906. #1:/Glacier Bay National Park and Preserve/wcw00375 ID. Wright, C.W. 375 Glacier Bay National Park and Preserve, Alaska. Hugh Miller Glacier. July 1906. #1:/Glacier Bay National Park and Preserve/wcw00376 ID. Wright, C.W. 376 Glacier Bay National Park and Preserve, Alaska. Terminus of Rendu Glacier at Rendu Inlet. July 31, 1906. #1:/Glacier Bay National Park and Preserve/wcw00377 ID. Wright, C.W. 377 Glacier Bay National Park and Preserve, Alaska. Terminus of Rendu Glacier at Rendu Inlet. July 31, 1906. #1:/Glacier Bay National Park and Preserve/wcw00378 ID. Wright, C.W. 378 Glacier Bay National Park and Preserve, Alaska. Terminus of Rendu Glacier at Rendu Inlet. July 31, 1906. #1:/Glacier Bay National Park and Preserve/wcw00381 ID. Wright, C.W. 381 Glacier Bay National Park and Preserve, Alaska. Glacier at east arm of Lituya Bay. 1906. #1:/Glacier Bay National Park and Preserve/wcw00383 ID. Wright, C.W. 383 Glacier Bay National Park and Preserve, Alaska. Terminus of glacier, east arm of Lituya Bay. August 17, 1906. #1:/Glacier Bay National Park and Preserve/wcw00425 ID. Wright, C.W. 425 Glacier Bay National Park and Preserve, Alaska. Branch of Favorite Glacier. 1906. #1:/Glacier Bay National Park and Preserve/wcw00426 ID. Wright, C.W. 426 Glacier Bay National Park and Preserve, Alaska. End of Wood Glacier. July 1906. #1:/Glacier Bay National Park and Preserve/wcw00428 ID. Wright, C.W. 428 Glacier Bay National Park and Preserve, Alaska. Tree trunks exposed along the beach on the west side of Glacier Bay. 1906. #1:/Glacier Bay National Park and Preserve/wcw00434 ID. Wright, C.W. 434 Glacier Bay National Park and Preserve, Alaska. Head of the south arm of Geikie Inlet. 1906. #1:/Alaska Glaciers/wcw00478 ID. Wright, C.W. 478 Alaska Glaciers. Taku Glacier, which is northeast of Juneau in the Coast Mountains. 1933. #1:/Glacier Bay National Park and Preserve/wcw00480 ID. Wright, C.W. 480 Glacier Bay National Park and Preserve, Alaska. Wood Glacier, looking across a large hole in the ice cap. 1931-33. #1:/Glacier Bay National Park and Preserve/wcw00481 ID. Wright, C.W. 481 Glacier Bay National Park and Preserve, Alaska. Looking across a cavern in the ice plateau near Favorite Glacier. 1931-33. #1:/Glacier Bay National Park and Preserve/wcw00484 ID. Wright, C.W. 484 Glacier Bay National Park and Preserve, Alaska. Geologists examining Favorite Inlet. 1931-33. #1:/Glacier Bay National Park and Preserve/wcw00491 ID. Wright, C.W. 491 Glacier Bay National Park and Preserve, Alaska. Icebergs in Muir Inlet. 1931-33. #1:/Glacier Bay National Park and Preserve/wcw00492 ID. Wright, C.W. 492 Glacier Bay National Park and Preserve, Alaska. Terminus of Lamplugh Glacier at John Hopkins Inlet. 1931-33. #1:/Glacier Bay National Park and Preserve/wcw00493 ID. Wright, C.W. 493 Glacier Bay National Park and Preserve, Alaska. Part of the terminus of Muir Glacier at Muir Inlet. 1931-33. #1:/Glacier Bay National Park and Preserve/wcw00496 ID. Wright, C.W. 496 Glacier Bay National Park and Preserve, Alaska. Glaciated low hills, Lamplugh Glacier. 1931-33. #1:/Glacier Bay National Park and Preserve/wcw00497 ID. Wright, C.W. 497 Glacier Bay National Park and Preserve, Alaska. Exhumed buried tree stumps on a new island in the center of Muir Glacier. 1931-33. #1:/Glacier Bay National Park and Preserve/wcw00499 ID. Wright, C.W. 499 Glacier Bay National Park and Preserve, Alaska. Exhumed buried tree stumps on island in the center of Muir Glacier. 1931-33. #1:/Glacier Bay National Park and Preserve/wcw00500 ID. Wright, C.W. 500 Glacier Bay National Park and Preserve, Alaska. Contact Glacier at John Hopkins Inlet. 1931-1933. #1:/Glacier Bay National Park and Preserve/wcw00501 ID. Wright, C.W. 501 Glacier Bay National Park and Preserve, Alaska. Silhouette of Professor H.F. Reiding and party at Favorite Inlet which is 80 fathoms deep and once filled by Favorite Glacier. 1931-33. #1:/Glacier Bay National Park and Preserve/wcw00504 ID. Wright, C.W. 504 Glacier Bay National Park and Preserve, Alaska. Terminus of John Hopkins Glacier, John Hopkins Inlet. 1931. #1:/Glacier Bay National Park and Preserve/wcw00505 ID. Wright, C.W. 505 Glacier Bay National Park and Preserve, Alaska. Geikie Inlet. 1931-33. #1:/Glacier Bay National Park and Preserve/wcw00510 ID. Wright, C.W. 510 Glacier Bay National Park and Preserve, Alaska. Icebergs in Geikie Inlet. 1931-33. #1:/Glacier Bay National Park and Preserve/wcw00512 ID. Wright, C.W. 512 Glacier Bay National Park and Preserve, Alaska. Favorite Valley. View is to the west. 1931-33. #1:/Glacier Bay National Park and Preserve/wcw00513 ID. Wright, C.W. 513 Glacier Bay National Park and Preserve, Alaska. Contact Glacier at John Hopkins Inlet. 1931-33. #1:/Glacier Bay National Park and Preserve/wcw00515 ID. Wright, C.W. 515 Glacier Bay National Park and Preserve, Alaska. Cushing Glacier (Cushing Plateau?). 1931-33. #1:/Glacier Bay National Park and Preserve/wcw00521 ID. Wright, C.W. 521 Glacier Bay National Park and Preserve, Alaska. North side of Geikie Inlet. #1:/Glacier Bay National Park and Preserve/wcw00522 ID. Wright, C.W. 522 Glacier Bay National Park and Preserve, Alaska. Favorite Glacier, Geikie Inlet. #1:/Glacier Bay National Park and Preserve/wcw00523 ID. Wright, C.W. 523 Glacier Bay National Park and Preserve, Alaska. South side of Geikie Inlet. #1:/Glacier Bay National Park and Preserve/wcw00524 ID. Wright, C.W. 524 Glacier Bay National Park and Preserve, Alaska. South side of Geikie Inlet. #1:/Glacier Bay National Park and Preserve/wcw00525 ID. Wright, C.W. 525 Glacier Bay National Park and Preserve, Alaska. From Geikie Glacier (photo wcw00525) to Geikie Inlet to Wood Glacier (photo wcw00527). Photos wcw00525 and wcw00527 form a panorama. #1:/Glacier Bay National Park and Preserve/wcw00527 ID. Wright, C.W. 527 Glacier Bay National Park and Preserve, Alaska. From Geikie Glacier (photo wcw00525) to Geikie Inlet to Wood Glacier (photo wcw00527). Photos wcw00525 and wcw00527 form a panorama. #1:/Glacier Bay National Park and Preserve/wcw00530 ID. Wright, C.W. 530 Glacier Bay National Park and Preserve, Alaska. East side of Geikie Glacier at Geikie Inlet (obscured). Two picture panorama. #1:/Glacier Bay National Park and Preserve/wcw00531 ID. Wright, C.W. 531 Glacier Bay National Park and Preserve, Alaska. Terminus of Geikie Glacier at Geikie Inlet. #1:/Glacier Bay National Park and Preserve/wcw00532 ID. Wright, C.W. 532 Glacier Bay National Park and Preserve, Alaska. East side of Charpentier Glacier. #1:/Glacier Bay National Park and Preserve/wcw00533 ID. Wright, C.W. 533 Glacier Bay National Park and Preserve, Alaska. Point north of Charpentier Glacier. #1:/Glacier Bay National Park and Preserve/wcw00534 ID. Wright, C.W. 534 Glacier Bay National Park and Preserve, Alaska. Point north of Charpentier Glacier. #1:/Glacier Bay National Park and Preserve/wcw00536 ID. Wright, C.W. 536 Glacier Bay National Park and Preserve, Alaska. From an island in Hugh Miller Inlet. Photos wcw00536 and wcw00357 form a panorama. #1:/Glacier Bay National Park and Preserve/wcw00537 ID. Wright, C.W. 537 Glacier Bay National Park and Preserve, Alaska. From an island in Hugh Miller Inlet. Photos wcw00536 and wcw00357 form a panorama. #1:/Glacier Bay National Park and Preserve/wcw00538 ID. Wright, C.W. 538 Glacier Bay National Park and Preserve, Alaska. Terminus of Hugh Miller Glacier. July 29, 1906. Photos wcw00538 and wcw00539 form a panorama. #1:/Glacier Bay National Park and Preserve/wcw00539 ID. Wright, C.W. 539 Glacier Bay National Park and Preserve, Alaska. Terminus of Hugh Miller Glacier. July 29, 1906. Photos wcw00538 and wcw00539 form a panorama. #1:/Glacier Bay National Park and Preserve/wcw00540 ID. Wright, C.W. 540 Glacier Bay National Park and Preserve, Alaska. West side of Hugh Miller Glacier terminus. July 1906. Photos wcw00540 and wcw00541 form a panorama. #1:/Glacier Bay National Park and Preserve/wcw00541 ID. Wright, C.W. 541 Glacier Bay National Park and Preserve, Alaska. West side of Hugh Miller Glacier terminus. July 1906. Photos wcw00540 and wcw00541 form a panorama. #1:/Glacier Bay National Park and Preserve/wcw00542 ID. Wright, C.W. 542 Glacier Bay National Park and Preserve, Alaska. Point south of the entrance of Reid Inlet. Photos wcw00542 and wcw00543 form a panorama. #1:/Glacier Bay National Park and Preserve/wcw00543 ID. Wright, C.W. 543 Glacier Bay National Park and Preserve, Alaska. Point south of the entrance of Reid Inlet. Photos wcw00542 and wcw00543 form a panorama. #1:/Glacier Bay National Park and Preserve/wcw00544 ID. Wright, C.W. 544 Glacier Bay National Park and Preserve, Alaska. East side, north arm of Hugh Miller Glacier. Photos wcw00544 and wcw00545 form a panorama. #1:/Glacier Bay National Park and Preserve/wcw00545 ID. Wright, C.W. 545 Glacier Bay National Park and Preserve, Alaska. East side, north arm of Hugh Miller Glacier. Photos wcw00544 and wcw00545 form a panorama. #1:/Glacier Bay National Park and Preserve/wcw00547 ID. Wright, C.W. 547 Glacier Bay National Park and Preserve, Alaska. West side, north arm of Hugh Miller Glacier. #1:/Glacier Bay National Park and Preserve/wcw00549 ID. Wright, C.W. 549 Glacier Bay National Park and Preserve, Alaska. West side, north arm of Hugh Miller Glacier. #1:/Glacier Bay National Park and Preserve/wcw00550 ID. Wright, C.W. 550 Glacier Bay National Park and Preserve, Alaska. Toward the terminus of Carroll Glacier at Queen Inlet, viewed from Triangle Island. #1:/Glacier Bay National Park and Preserve/wcw00551 ID. Wright, C.W. 551 Glacier Bay National Park and Preserve, Alaska. Terminus of Carroll Glacier at Queen Inlet. #1:/Glacier Bay National Park and Preserve/wcw00552 ID. Wright, C.W. 552 Glacier Bay National Park and Preserve, Alaska. East side of Rendu Inlet. #1:/Glacier Bay National Park and Preserve/wcw00553 ID. Wright, C.W. 553 Glacier Bay National Park and Preserve, Alaska. Toward the terminus of Rendu Glacier, east side of Rendu Inlet. #1:/Glacier Bay National Park and Preserve/wcw00554 ID. Wright, C.W. 554 Glacier Bay National Park and Preserve, Alaska. Terminus of Rendu Glacier and west side of Rendu Inlet. Photos wcw00554 and wcw00555 form a panorama. #1:/Glacier Bay National Park and Preserve/wcw00555 ID. Wright, C.W. 555 Glacier Bay National Park and Preserve, Alaska. Terminus of Rendu Glacier and west side of Rendu Inlet. Photo blurred on left portion. Photos wcw00554 and wcw00555 form a panorama. #1:/Glacier Bay National Park and Preserve/wcw00567 ID. Wright, C.W. 567 Glacier Bay National Park and Preserve, Alaska. South side of Morse Glacier (terminus). Photos wcw00567 and wcw00568 form a panorama. #1:/Glacier Bay National Park and Preserve/wcw00568 ID. Wright, C.W. 568 Glacier Bay National Park and Preserve, Alaska. South side of Morse Glacier (terminus). Photos wcw00567 and wcw00568 form a panorama. #1:/Glacier Bay National Park and Preserve/wcw00569 ID. Wright, C.W. 569 Glacier Bay National Park and Preserve, Alaska. North side of G Mountain, Muir Glacier. Photos wcw00569, wcw00570, and wcw00572 form a panorama. #1:/Glacier Bay National Park and Preserve/wcw00570 ID. Wright, C.W. 570 Glacier Bay National Park and Preserve, Alaska. North side of G Mountain, Muir Glacier. Photos wcw00569, wcw00570, and wcw00572 form a panorama. #1:/Glacier Bay National Park and Preserve/wcw00571 ID. Wright, C.W. 571 Glacier Bay National Park and Preserve, Alaska. Terminus of Muir Glacier. #1:/Glacier Bay National Park and Preserve/wcw00572 ID. Wright, C.W. 572 Glacier Bay National Park and Preserve, Alaska. North side of G Mountain, Muir Glacier. Photos wcw00569, wcw00570, and wcw00572 form a panorama. #1:/Glacier Bay National Park and Preserve/wcw00585 ID. Wright, C.W. 585 Glacier Bay National Park and Preserve, Alaska. South Nunatak, Muir Glacier. #1:/Glacier Bay National Park and Preserve/wcw00586 ID. Wright, C.W. 586 Glacier Bay National Park and Preserve, Alaska. South side of Brooks Inlet. Photos wcw00586 and wcw00587 form a panorama. #1:/Glacier Bay National Park and Preserve/wcw00587 ID. Wright, C.W. 587 Glacier Bay National Park and Preserve, Alaska. South side of Brooks Inlet. Photos wcw00586 and wcw00587 form a panorama. #1:/Glacier Bay National Park and Preserve/wcw00592 ID. Wright, C.W. 592 Glacier Bay National Park and Preserve, Alaska. Up valley, viewed from the south side of Girdled Glacier. #1:/Glacier Bay National Park and Preserve/wcw00596 ID. Wright, C.W. 596 Glacier Bay National Park and Preserve, Alaska. Crillon Glacier at Lituya Bay. #1:/Glacier Bay National Park and Preserve/wcw00597 ID. Wright, C.W. 597 Glacier Bay National Park and Preserve, Alaska. Crillon Glacier at Lituya Bay. August 1906. Photos wcw00597 and wcw00598 form a panorama. #1:/Glacier Bay National Park and Preserve/wcw00598 ID. Wright, C.W. 598 Glacier Bay National Park and Preserve, Alaska. Crillon Glacier at Lituya Bay. August 1906. Photos wcw00597 and wcw00598 form a panorama. #1:/Glacier Bay National Park and Preserve/wcw00610 ID. Wright, C.W. 610 Glacier Bay National Park and Preserve, Alaska. West arm of the glacier at Lituya Bay. August 17, 1906. #1:/Glacier Bay National Park and Preserve/wcw00611 ID. Wright, C.W. 611 Glacier Bay National Park and Preserve, Alaska. Terminus of Lituya Glacier at Lituya Bay. August 1906. #1:/Glacier Bay National Park and Preserve/wcw00622 ID. Wright, C.W. 622 Glacier Bay National Park and Preserve, Alaska. Plateau Glacier on the extreme left. Tongue of Burroughs Glacier at left center. Muir Glacier at right center. What was later named The Nunatak at right center. View is approximately west-northwest across upper Muir Inlet from Wright's Muir Inlet station 5. 1931. #1:/Glacier Bay National Park and Preserve/wcw00624 ID. Wright, C.W. 624 Glacier Bay National Park and Preserve, Alaska. Muir Glacier on the left. Casement Glacier in the center. View is approximately north-northeast across Muir Inlet from Wright's 1931 Muir Inlet station 9. 1931. #1:/Glacier Bay National Park and Preserve/wcw00626 ID. Wright, C.W. 626 Glacier Bay National Park and Preserve, Alaska. Plateau Glacier at left center. Tongue of Burroughs Glacier at right center. View is approximately west-southwest across Muir Inlet from Wright's 1931 Muir Inlet station 3. 1931. #1:/Glacier Bay National Park and Preserve/wcw00627 ID. Wright, C.W. 627 Glacier Bay National Park and Preserve, Alaska. Muir Glacier on the left. Remnant of McBride Glacier on the right. What is now called The Nunatak is between the glaciers at right center. View is approximately north from Wright's 1931 Muir Inlet station 3. 1931. #1:/Glacier Bay National Park and Preserve/wcw00628 ID. Wright, C.W. 628 Glacier Bay National Park and Preserve, Alaska. Tidal terminus of Plateau Glacier and Wachusett Inlet. View is approximately west from Wright's 1931 Muir Inlet station 4. 1931. #1:/Glacier Bay National Park and Preserve/wcw00629 ID. Wright, C.W. 629 Glacier Bay National Park and Preserve, Alaska. Southern tongue of Plateau Glacier. Muir Inlet on the left. View is approximately south-southwest from Wright's 1931 Muir Inlet station 4. 1931. #1:/Glacier Bay National Park and Preserve/wcw00630 ID. Wright, C.W. 630 Glacier Bay National Park and Preserve, Alaska. Plateau Glacier and Wachusett Inlet on the left. Muir Glacier on the right. View is approximately northwest from a boat in Muir Inlet. 1931. #1:/Glacier Bay National Park and Preserve/wcw00631 ID. Wright, C.W. 631 Glacier Bay National Park and Preserve, Alaska. Muir and Adams Inlet. Muir Glacier complex on the left. Casement Glacier at left center. What Wright called "Adams Plateau Glacier" at center. View is approximately north- northeast from Wright's Muir Inlet station 11. Station 11 is on the northwest shoulder of Mount Wright at about 3,000 feet elevation. 1931. #1:/Glacier Bay National Park and Preserve/wcw00632 ID. Wright, C.W. 632 Glacier Bay National Park and Preserve, Alaska. Mount Case on the left. Mount Wright on the right. View is approximately east from Wright's 1931 Muir Inlet station 11. Station 11 is on the northwest shoulder of Mount Wright at about 3,000 feet elevation. 1931. #1:/Glacier Bay National Park and Preserve/wcw00633 ID. Wright, C.W. 633 Glacier Bay National Park and Preserve, Alaska. Muir Inlet. Morse Glacier at right center. Plateau-Burroughs Glacier complex on the right. View is approximately west-northwest from Wright's 1931 Muir Inlet station 11. Station 11 is on the northwest shoulder of Mount Wright at about 3,000 feet elevation. 1931. #1:/Glacier Bay National Park and Preserve/wcw00634 ID. Wright, C.W. 634 Glacier Bay National Park and Preserve, Alaska. Carroll Glacier at Queen Inlet. View is approximately west from Wright's 1931 station on the east side of the terminus. 1931. #1:/Glacier Bay National Park and Preserve/wcw00635 ID. Wright, C.W. 635 Glacier Bay National Park and Preserve, Alaska. Rendu Glacier at Rendu Inlet. View is approximately west-northwest from Wright's 1931 Rendu station 1. 1931. #1:/Glacier Bay National Park and Preserve/wcw00637 ID. Wright, C.W. 637 Glacier Bay National Park and Preserve, Alaska. Up Tarr Inlet to Grand Pacific Glacier at center. Margerie Glacier on the left. View is approximately north- northwest from Wright's 1931 Tarr Inlet station 1. 1931. #1:/Glacier Bay National Park and Preserve/wcw00638 ID. Wright, C.W. 638 Glacier Bay National Park and Preserve, Alaska. Charpentier Glacier on the left and Maynard Glacier on the right at Charpentier Inlet. View is approximately southwest from Wright's 1931 Charpentier station 2. 1931. #1:/Glacier Bay National Park and Preserve/wcw00639 ID. Wright, C.W. 639 Glacier Bay National Park and Preserve, Alaska. Margerie Glacier on left. Grand Pacific Glacier on the right. View is from Wright's Tarr Inlet station 3. 1931. #1:/Glacier Bay National Park and Preserve/wcw00640 ID. Wright, C.W. 640 Glacier Bay National Park and Preserve, Alaska. Tarr Inlet and Margerie Glacier. View is approximately south-southeast from Wright's 1931 Tarr Inlet station 2. 1931. #1:/Glacier Bay National Park and Preserve/wcw00641 ID. Wright, C.W. 641 Glacier Bay National Park and Preserve, Alaska. Grand Pacific Glacier at Tarr Inlet. Mount Barnard on the right. View is approximately north-northeast from Wright's Tarr Inlet station 2. 1931. #1:/Glacier Bay National Park and Preserve/wcw00642 ID. Wright, C.W. 642 Glacier Bay National Park and Preserve, Alaska. Johns Hopkins Inlet. Hoonah Glacier on the left. Gilman Glacier at right center. Johns Hopkins Glacier on the extreme right. View is approximately south from Wright's 1931 Johns Hopkins station 3. 1931. #1:/Glacier Bay National Park and Preserve/wcw00643 ID. Wright, C.W. 643 Glacier Bay National Park and Preserve, Alaska. Johns Hopkins Glacier at Johns Hopkins Inlet. View is approximately west-southwest from Wright's 1931 Johns Hopkins station 2. 1931. #1:/Glacier Bay National Park and Preserve/wcw00644 ID. Wright, C.W. 644 Glacier Bay National Park and Preserve, Alaska. Johns Hopkins Glacier at Johns Hopkins Inlet. View is approximately south-southwest from Wright's 1931 Johns Hopkins station 1. 1931. #1:/Glacier Bay National Park and Preserve/wcw00645 ID. Wright, C.W. 645 Glacier Bay National Park and Preserve, Alaska. Lamplugh Glacier on upper Glacier Bay. View is approximately west-southwest from Wright's 1931 Lamplugh station 1. 1931. #1:/Glacier Bay National Park and Preserve/wcw00646 ID. Wright, C.W. 646 Glacier Bay National Park and Preserve, Alaska. Reid Glacier. View is south from Wright's 1931 Reid station 1. 1931. #1:/Glacier Bay National Park and Preserve/wcw00647 ID. Wright, C.W. 647 Glacier Bay National Park and Preserve, Alaska. Hugh Miller Glacier at Hugh Miller Inlet. View is approximately west-southwest from Wright's 1931 Hugh Miller station 4. 1931. #1:/Glacier Bay National Park and Preserve/wcw00648 ID. Wright, C.W. 648 Glacier Bay National Park and Preserve, Alaska. Hugh Miller Inlet. Hugh Miller Glacier in the center. Scidmore Glacier on the extreme right. View is approximately south-southwest from Wright's 1931 Hugh Miller station 18A. 1931. #1:/Glacier Bay National Park and Preserve/wcw00649 ID. Wright, C.W. 649 Glacier Bay National Park and Preserve, Alaska. Part of Hugh Miller Glacier terminus at Hugh Miller Inlet. View is about northwest from Wright's 1931 station 5. 1931. #1:/Glacier Bay National Park and Preserve/wcw00650 ID. Wright, C.W. 650 Glacier Bay National Park and Preserve, Alaska. Hugh Miller Glacier at Hugh Miller Inlet. View is approximately northwest from Wright's 1931 Hugh Miller station 5. 1931. #1:/Glacier Bay National Park and Preserve/wcw00651 ID. Wright, C.W. 651 Glacier Bay National Park and Preserve, Alaska. Charpentier Inlet and Charpentier Glacier. View is approximately southeast from Wright's 1931 Charpentier station 2. 1931. #1:/Glacier Bay National Park and Preserve/wcw00653 ID. Wright, C.W. 653 Glacier Bay National Park and Preserve, Alaska. Geikie Glacier at Geikie Inlet. View is approximately west-northwest from Wright's 1931 Geikie Inlet station 3. 1931. #1:/Glacier Bay National Park and Preserve/wcw00654 ID. Wright, C.W. 654 Glacier Bay National Park and Preserve, Alaska. Wood Glacier at Geikie Inlet. View is approximately south-southeast from Wright's 1931 Geikie Inlet station 4. 1931. #1:/Glacier Bay National Park and Preserve/wcw00655 ID. Wright, C.W. 655 Glacier Bay National Park and Preserve, Alaska. Wood Glacier at Geikie Inlet. View is approximately south-southwest from Wright's 1931 Geikie Inlet station 5. 1931. #1:/Glacier Bay National Park and Preserve/wcw00713 ID. Wright, C.W. 713 Glacier Bay National Park and Preserve, Alaska. 720,000 ton iceberg in Muir Inlet, viewed from the bow of a ship. 1931. #1:/Glacier Bay National Park and Preserve/wcw00714 ID. Wright, C.W. 714 Glacier Bay National Park and Preserve, Alaska. Charpentier Glacier station 1. 1931. #1:/Glacier Bay National Park and Preserve/wcw00715 ID. Wright, C.W. 715 Glacier Bay National Park and Preserve, Alaska. Geikie Glacier station 3. 1931. #1:/Glacier Bay National Park and Preserve/wcw00717 ID. Wright, C.W. 717 Glacier Bay National Park and Preserve, Alaska. Uncovered buried forest, viewed from Muir Inlet station 5. 1931. #1:/Glacier Bay National Park and Preserve/wcw0328a ID. Wright, C.W. 328a Glacier Bay National Park and Preserve, Alaska. Icebergs in Reid Inlet. 1906. #1:/Glacier Bay National Park and Preserve/wcw0381a ID. Wright, C.W. 381a Glacier Bay National Park and Preserve, Alaska. Romer Glacier(?), west of Rendu Inlet. 1906. #1:/Glacier Bay National Park and Preserve/wcw0383a ID. Wright, C.W. 383a Glacier Bay National Park and Preserve, Alaska. Flume at placer diggings at Lituya Bay. August 1906. #1:/Glacier Bay National Park and Preserve/wcw0385a ID. Wright, C.W. 385a Glacier Bay National Park and Preserve, Alaska. Placer diggings at Lituya Bay. 1906. #1:/Glacier Bay National Park and Preserve/wcw0566a ID. Wright, C.W. 566a Glacier Bay National Park and Preserve, Alaska. West side of Muir Inlet. #1:/Glacier Bay National Park and Preserve/wcw0584a ID. Wright, C.W. 584a Glacier Bay National Park and Preserve, Alaska. South Nunatak, Muir Glacier terminus. #1:/Glacier Bay National Park and Preserve/wcw0609a ID. Wright, C.W. 609a Glacier Bay National Park and Preserve, Alaska. Lituya Bay, Lituya Glacier, west arm, and Crillon Glacier. August 17, 1906. #1:/Yellowstone National Park/wde00002 ID. White, D.E. 2ct Yellowstone National Park, Wyoming. Drill core about 3 inches in diameter from drill hole Y-9 in Norris Geyser Basin. Depth about three meters in basal part of member B, Lava Creek Tuff, showing large collapsed pumice lumps (white and light gray). Hydrothermal bleaching and oxidation of pyrite were controlled by a vertical fracture. September 28, 1967. Figure 3, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00003 ID. White, D.E. 3ct Yellowstone National Park, Wyoming. Eastward over explosion crater in Norris Geyser Basin. Blue-green color of the crater is typical of acid-sulfate waters. Prominent northeast-striking structure (lower right to upper left) trends through The Reservoir (blue water), a possible but less likely explosion crater. Hydrothermally altered areas (white to gray) contrast with nonthermal meadows (straw yellow in the distance). October 18, 1967. Figure 5, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00004 ID. White, D.E. 4ct Yellowstone National Park, Wyoming. Vents and eruption debris at the south base of Porcelain Terrace in Norris Geyser Basin. Steam is from a small-scale hydrothermal eruption. September 9, 1971. Figure 6, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00005 ID. White, D.E. 5ct Yellowstone National Park, Wyoming. Self-sealing multiple vents southeast of Opal Spring at Porcelain Terrace in Norris Geyser Basin. Water in Opal is opalescent blue from light-scattering colloidal SiO2 (silicon dioxide) polymerized in the pool. Diameter of the pool is about 4 meters. September 1947. Figure 7, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00006 ID. White, D.E. 6ct Yellowstone National Park, Wyoming. Cistern Spring three hours after Steamboat Geyser in Norris Geyser Basin had started its major eruption of June 3, 1968, and nearly two years after Cistern's response to Steamboat's eruption had become evident. The degree of superheat and water level have both started to decline. The tree on the right (brown) was killed by heat, but the small trees above the pool have not yet been killed or flooded. June 3, 1968. Figure 8, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00007 ID. White, D.E. 7ct Yellowstone National Park, Wyoming. Coral Spring in Norris Geyser Basin discharging high SiO2 (silicon dioxide) water that ponds and cools enough to polymerize to light-scattering colloidal SiO2 with characteristic opalescent- blue color. Note the thin sinter crusts deposited at water level and flowline trends (center). The piece of wood in the left foreground is about three- tenths of a meter long. September 1959. Figure 9, U.S. Geological Survey Professional Paper 1456. Compare with photo wde00008. #1:/Yellowstone National Park/wde00008 ID. White, D.E. 8ct Yellowstone National Park, Wyoming. Coral Spring in Norris Geyser Basin now non-discharging and self-sealed by May 21, 1966. Its former exquisite sinter- lined borders are partly disintegrated. Note increased prominence of former flowline trends and dark algae responsive to low temperatures. Figure 10, U.S. Geological Survey Professional Paper 1456. Compare with photo wde00007. #1:/Yellowstone National Park/wde00009 ID. White, D.E. 9ct Yellowstone National Park, Wyoming. Porkchop Geyser in Norris Geyser Basin hours after its eruption of September 3, 1972. Normally clear of opalescent blue with slightly surging minor discharge, it is shown here as nearly empty but refilling. Note details and colors of opaline sinters above (white and gray) and below (tan) normal water level. The rock near the center is about 4 centimeters in diameter. September 3, 1972. Figure 11, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00010 ID. White, D.E. 10ct Yellowstone National Park, Wyoming. North end of Porkchop Geyser (spring) in Norris Geyser Basin, showing pine needles, small cones, and grass encased by opaline SiO2 (silicon dioxide). Chlorine and SiO2 contents of this spring are consistently near the maximum of Norris Basin. September 3, 1972. Figure 12, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00011 ID. White, D.E. 11ct Yellowstone National Park, Wyoming. Porkchop Geyser (spring) in Norris Geyser Basin, showing flowline trends in sinter. The hottest water rises from the vent (foreground, slightly blue), flows out over the pool's surface (low density) and cools, then descends down maximum slope (compare with swirling descent of Coral Spring, photo wde00007). Residence time of water in this pool is seldom long enough for SiO2 (silicon dioxide) to polymerize, but the opalescent blue of colloidal SiO2 has been observed. Brown algae grows on cool borders that are continuously wet. White sinter is dry except during eruptions when temperatures are too high and variable to sustain algae. September 2, 1959. Figure 13, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00012 ID. White, D.E. 12ct Yellowstone National Park, Wyoming. Ledge Geyser's multiple vents, looking northwest, showing a northwest-striking fracture in the Lava Creek Tuff controlling vent locations in Norris Geyser Basin. Sinter is white, and the green vegetation in the left foreground indicates minor spray from the geyser. May 27, 1968. Figure 14, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00013 ID. White, D.E. 13ct Yellowstone National Park, Wyoming. Valentine Geyser (strongest steam plume on the left) and dispersed vents of Black Growler (fumaroles, center and upper right) distributed around the margins of Valentine's crater cut into block- jointed Lava Creek Tuff in Norris Geyser Basin. Note bleached (gray) borders and unbleached (red-brown) centers of joint blocks behind Valentine's steam plume (right). September 29, 1967. Figure 15, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00015 ID. White, D.E. 15ct Yellowstone National Park, Wyoming. Hydrophane Springs in Norris Geyser Basin after widespread reactivation in 1982. For many years this area of thick white sinter (gray and brown on weathered surfaces) had no surface discharge but had standing water levels and local boiling approximately 2 meters below general level. Here, opalescent high-SiO2 water has discharged and polymerized from new high-level vents and flowed subsurface, perhaps into lower vents, eastward into Gray Lakes. View is north. Nearest pool is 1.0 to 1.5 meters in diameter. April 1983. Figure 17, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00016 ID. White, D.E. 16ct Yellowstone National Park, Wyoming. North-northwest over Norris Geyser Basin, the Norris-Mammoth Corridor, and Roaring Mountain, the prominent white alteration scar in the distant left. Sinter and acid-bleached ash-flow tuffs are white, and water-logged meadows are tan. Sparse vegetation of two channels in the central foreground is caused by warm dilute acid meteoric springs. October 18, 1967. Figure 18, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00017 ID. White, D.E. 17ct Yellowstone National Park, Wyoming. West-northwest over Nuphar Lake (lower left, blue), Porcelain Basin (white and bluish), and the Annex Area (lower center beyond road) in Norris Geyser Basin. October 18, 1967. Figure 19, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00018 ID. White, D.E. 18ct Yellowstone National Park, Wyoming. Warm dilute acid spring believed to represent acid meteoric recharge from near the crest of Norris Dome in Norris Geyser Basin. Green colors are from acid-loving microorganisms, probably coolest on the left. Sinter fragments in the central yellow-green band are generally dry on top sides, with spinose sinter from alternate wetting and drying. May 21, 1966. Figure 21, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00019 ID. White, D.E. 19ct Yellowstone National Park, Wyoming. Echinus Geyser in Norris Geyser Basin erupting acid So4-Cl water, common in Norris Geyser Basin but rare in most geyser areas of the world. Photo by J. Whipple, August 1979. Figure 22, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00020 ID. White, D.E. 20ct Yellowstone National Park, Wyoming. Echinus Geyser pool and discharge area in Norris Geyser Basin about five minutes after the end of an eruption in July 1965. Brown and yellow-brown spinose sinter is characteristic of sinter from acid water high in iron, manganese, arsenic, and aluminum, which here covers old blocks of opaline sinter, white on fresh surfaces, underlain about 1 meter by logs yielding a carbon-14 age of about 530 years before present. Diameter of pool at the then-existing water level was about 2 meters. Interlayered pyrite and marcasite occur in veins as much as 1 centimeter wide near and below water level. July 1965. Figure 23, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00021 ID. White, D.E. 21ct Yellowstone National Park, Wyoming. Green Dragon Spring in Norris Geyser Basin, discharging acid Cl-So4 water of long-debated origin. Only visible production of sulfur and sulfates (yellow and orange) is on the roof and sides of Dragon's Mouth. Water discharges from three vents (one under the ledge) into Gray Lakes, and both features have nearly the same total discharge. Green Dragon is now viewed as partly recirculated Gray Lakes' water in which thermophylic organisms oxidize H2S (hydrogen sulfide) to sulfate at high temperatures. Surging in the foreground is about four-tenths of a meter in diameter. September 1947. Figure 24, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00022 ID. White, D.E. 22ct Yellowstone National Park, Wyoming. Central Porcelain Basin in Norris Geyser Basin with many acid and few neutral springs, looking northeast to Porcelain Terrace, an area of frequent changes, where youngest sinter is white and old sinter is gray to tan. September 1947. Figure 25, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00023 ID. White, D.E. 23ct Yellowstone National Park, Wyoming. Merging of nearly neutral and acid discharge streams in Porcelain Basin in Norris Geyser Basin. Colors are mostly from inorganic chemical precipitates, but greens are thermophilic organisms. September 1, 1969. Figure 26, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00024 ID. White, D.E. 24ct Yellowstone National Park, Wyoming. Yellow Funnel Spring in Norris Geyser Basin, showing color variations from blue-green (deepest part of vent), yellow (sulfur), orange-brown (ferric sulfates), and purple (ferric sulfate, not studied in detail). In recent years this spring has been generally turbid and unattractive. Diameter about 3 meters. September 1947. Figure 27, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00025 ID. White, D.E. 25ct Yellowstone National Park, Wyoming. Sulfur Dust Spring in Norris Geyser Basin, depositing flocculated sulfur (yellow) but little or no sinter. Acid So4-Cl water and intermittent gas bubbles rise through the holes in the pool's bottom. July 10, 1968. Figure 28, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00026 ID. White, D.E. 26ct Yellowstone National Park, Wyoming. Vermillion Spring in Norris Geyser Basin, an acid So4 (sulfate) water consisting of condensed steam, surface drainage, oxidized sulfate from H2S (hydrogen sulfide), and suspended ferric oxide. Diameter is about 2 meters. Color changes season-to-season and year-to-year as constituent proportions and pH change. September 1947. Figure 29, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00027 ID. White, D.E. 27ct Yellowstone National Park, Wyoming. Black Growler fumarole in Norris Geyser Basin, which has had as many as five vents ranging in temperature from nearly boiling to 138 degrees Celsius. The noisiest fumarole shifts from one to another with time; the hottest or noisiest is commonly called the Black Growler (left vent). June 6, 1950. Figure 30, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00028 ID. White, D.E. 28ct Yellowstone National Park, Wyoming. Opal Spring in Norris Geyser Basin, which had been discharging neutral opalescent high-SiO2 water prior to the Hebgen Lake earthquake of August 17, 1959, then changed to a non-discharging acidic pool. September 2, 1959. Figure 31, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00029 ID. White, D.E. 29ct Yellowstone National Park, Wyoming. Congress Pool in Norris Geyser Basin, normally a large turbid acid Cl-S04 pool, had two new mud pots, each three- tenths of a meter in diameter, on the crater's south rim on September 3, 1972, that resulted from the August 8, 1972 disturbance. Damp recently ejected mud (left foreground) is dark; older mud is light gray and has desiccation cracks. Yellowish colors on the far rim of the pool are Fe and Al sulfates. September 3, 1972. Figure 32, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00030 ID. White, D.E. 30ct Yellowstone National Park, Wyoming. Congress Pool (spring) in Norris Geyser Basin on September 30, 1972, photographed four weeks after photo wde00029. Spring is shown discharging during a rare period of increased water level. Pool diameter is about 13 meters. Opalescent-blue neutral water increased in chloride and SiO2 (silicon dioxide). September 30, 1972. Figure 33, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00031 ID. White, D.E. 31ct Yellowstone National Park, Wyoming. Cinder Pool in Norris Geyser Basin half- covered with floating black "cinders" of native sulfur containing gas cavities and dispersed black iron sulfide. View is northward across Tantalus Creek. September 24, 1975. Figure 34, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00032 ID. White, D.E. 32ct Yellowstone National Park, Wyoming. Steam Valve Spring (geyser and mud pot), the highest altitude discharging vent of Norris Geyser Basin between 1946 and 1985, discharging tan turbid water. Photo by J. Whipple, June 1982. Figure 35-A, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00033 ID. White, D.E. 33ct Yellowstone National Park, Wyoming. Steam Valve Spring (geyser and mud pot), the highest altitude discharging vent of Norris Geyser Basin between 1946 and 1985, between eruptions. Reconstruction of its history suggests at least three different periods of activity. Pinedale till (just above water level) is overlain by cemented till and remnants of a cone of earliest opaline sinter. The cone was capped by blacktop of a former parking lot. A second period of activity (the first to have been observed) broke through the black top in 1947 and was again infilled about 1967, then was finally reactivated in 1982-85. September 20, 1984. Figure 35-B, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00034 ID. White, D.E. 34ct Yellowstone National Park, Wyoming. Concrete monument and rocks to stabilize Carnegie II drill hole in Norris Geyser Basin, the world's second research hole drilled in a geothermal area. Vapor from the cone of Congress Pool is in the upper left. Note the absence of all vegetation in the immediate vicinity. Man is Dr.A. Steiner of New Zealand, one of the earliest petrologists of active hydrothermal alteration. September 10, 1967. Portion of Figure 36, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00035 ID. White, D.E. 35ct Yellowstone National Park, Wyoming. Dark Cavern Geyser in Norris Geyser Basin, looking east to Black Growler fumarole (right) and dead trees south of Congress Pool (distant center). Note dark color (FeS in sinter) in Dark Cavern's channel and acid splash zone. Width of near channel is about four-tenths of a meter. September 3, 1954. Figure 37, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00036 ID. White, D.E. 36ct Yellowstone National Park, Wyoming. Steaming ground 10 to 20 meters southeast of Carnegie II drill hole in Norris Geyser Basin, five days before boiling temperatures and water overpressures were first measured in research drill hole Y-9, 130 meters to the south-southwest, on October 5, 1967. No visible fluids were escaping near the Carnegie II monument. September 30, 1967. Figure 38, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00039 ID. White, D.E. 39ct Yellowstone National Park, Wyoming. "Cinders" (about 1 millimeter in diameter) of Cinder Pool in Norris Geyser Basin. Their origin was unknown until 1969, but by September 1984 about 35 percent were golden in reflected light. For unknown reasons, iron sulfide was dispersed in only about two- thirds of the "cinders." September 1984. Figure 41, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00040 ID. White, D.E. 40ct Yellowstone National Park, Wyoming. Thermistor probe after withdrawal from Cinder Pool in Norris Geyser Basin on August 4, 1969. The 4-inch long probe had penetrated a molten "pot" of elemental sulfur that congealed on the probe and cable during withdrawal. August 4, 1969. Figure 43, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00041 ID. White, D.E. 41ct Yellowstone National Park, Wyoming. Cistern Spring in Norris Geyser Basin drained to 5 to 7 meters below overflow in response to a major eruption of Steamboat Geyser. Sinter "scales" had deposited on logs and pool margins during intervening years, pointing in the direction of convective flow. The tree trunk in the foreground is about three-tenths of a meter in diameter. November 1982. Figure 44, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00042 ID. White, D.E. 42ct Yellowstone National Park, Wyoming. Hydrophane Springs in Norris Geyser Basin, viewed from the north. Water rises in a broad pool (least opalescent blue) behind the steam plume on the left, flows into adjacent pools as water cools and SiO2 (silicon dioxide) polymerizes to opalescent SiO2, then disappears underground in old hydrophane vents in the middle distance. Some shallow spring borders are colored tan and brown by algae that cannot tolerate high spring-water temperatures. Round pool in the foreground is about 1 meter in diameter. September 17, 1984. Figure 45, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00043 ID. White, D.E. 43ct Yellowstone National Park, Wyoming. Minute Geyser in Norris Geyser Basin in major eruption about 20 meters high. The geyser was later vandalized by filling its large western vent (left) with rocks that became firmly cemented by sinter. The small eastern vent, here steaming vigorously, continues to have minor eruptions several meters high. View is northeast. September 1947. Figure 46, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00044 ID. White, D.E. 44ct Yellowstone National Park, Wyoming. Phillips Cauldron, a mud volcano in Norris Geyser Basin that was vigorously active in 1947, intermittently ejecting thick mud clots when surface water was scarce, but a surging gray viscous pool when surface water was more abundant, as shown here, when the pool was about 4 meters in diameter. September 1947. Figure 47, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00045 ID. White, D.E. 45ct Yellowstone National Park, Wyoming. Ornate terraced sinter vent of a short- lived spring at the south end of Porcelain Terrace in Norris Geyser Basin. Note the natural levees of white opaline sinter that confine most discharge to a single channel away from the vent. Colors are darker where the water is deeper. September 25, 1967. Figure 48, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00047 ID. White, D.E. 47ct Yellowstone National Park, Wyoming. Vixen Geyser in Norris Geyser Basin has two types of eruption, one normally with short rapid-fire pulses, height 2 to 5 meters (as shown), and with no external discharge beyond the wet white and green-brown area. A second rare type erupts 6 to 10 meters and has external discharge northeast about 50 meters to Tantalus Creek. A central reddish-brown iron-stained area may mark the former location of a cone reportedly removed and sent to the National Museum. September 1984. Figure 51, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00048 ID. White, D.E. 48ct Yellowstone National Park, Wyoming. Whirligig Geyser vent in Norris Geyser Basin almost drained after an eruption. Intense orange iron-rich sediment, deposited around the vent and in the discharge channel, is characteristic of many acid Cl-SO4 springs. Photo by J. Whipple, August 1983. Figure 52, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00050 ID. White, D.E. 50ct Yellowstone National Park, Wyoming. Annex Area, east of Porcelain Terrace in Norris Geyser Basin, emits mostly H2S (hydrogen sulfide) and other gases and minor Cl-SO4 water. This spring has precipitated much elemental sulfur (pale yellow) similar to Sulfur Dust Spring. Y-12 drill hole was intentionally located between Porcelain Terrace and the Annex Area in a successful effort to obtain maximum temperatures in overpressured, nearly self-sealed Lava Creek Tuff. May 21, 1966. Figure 54, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00051 ID. White, D.E. 51ct Yellowstone National Park, Wyoming. Primrose Springs in Norris Geyser Basin, showing contrasting colors characterized by varied chemistry of waters and inorganic precipitates. Black is FeS (ferrous sulfide)in near pool (about 1 meter in diameter), browns are iron oxides, and white and light gray are from precipitated colloidal SiO2 (silicon dioxide). October 19, 1967. Figure 55, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00052 ID. White, D.E. 52ct Yellowstone National Park, Wyoming. Porcelain Springs at the base of Porcelain Terrace in Norris Geyser Basin, showing the nearest spring rapidly evolving from a neutral cloride-SiO2 (silicon dioxide) type to an acid chloride-SO4 (sulfate) type, with Fe++ oxidizing to Fe+++, seeping away from observer. Iron-stained, orange bordered pool is about one meter wide. August 1976. Figure 56, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00053 ID. White, D.E. 53ct Yellowstone National Park, Wyoming. Inactive, so-called morning-glory vent of north Double Bulger Geyser in Norris Geyser Basin is probably initially a geyser vent that became inactive as it was self-sealed by successive layers of sinter. Inner diameter is about two-tenths of a meter. Surface layers of sinter and organisms were removed by weathering and wind. Colors are now in shades of gray. Many other vents may have similar layering, but are not adequately exposed. May 25, 1966. Figure 57, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00055 ID. White, D.E. 55ct Yellowstone National Park, Wyoming. Area north-northwest of Steamboat Geyser in Norris Geyser Basin where high heat flow has melted snow more rapidly than in adjacent areas. Note the stunted trees and absence of other vegetation where heat flow and soil-zone acidity are too high for normal vegetation. October 2, 1969. Figure 59, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00056 ID. White, D.E. 56ct Yellowstone National Park, Wyoming. Rime, or columnar ice, in Norris Geyser Basin that grows upward from freezing of condensing convected water vapor at the air-soil interface. Ice is supplied by minor upward flowing water vapor and major other geothermal gases from which most heat and water vapor has already been lost, as along the snowline shown in photo wde00055. Residual water vapor condenses and freezes in porous surficial soil. Individual ice columns incorporate sand grains and grow upward until they topple of their own weight. May 16, 1968. Figure 60, U.S. Geological Survey Professional Paper 1456. #1:/Yellowstone National Park/wde00057 ID. White, D.E. 57ct Yellowstone National Park, Wyoming. Accumulated frozen spray about 4 meters thick from Africa Geyser in Norris Geyser Basin, melting mainly from the base upward due to high near-surface heat flow in Porcelain Basin. Note basal discontinuity of snow layering and partial melting of layers adjacent to the warm stream. April 1979. Figure 61, U.S. Geological Survey Professional Paper 1456. #1:/Winchester D.E. Collection/winc0463 ID. Winchester, D.E. 463 Abandoned old shale retort near Juab, used more than 40 years ago. Juab County, Utah. 1916. Plate 11 in U.S. Geological Survey. Bulletin 691. 1919. #1:/Winchester D.E. Collection-Oil Shale Mining Company/winc0464 ID. Winchester, D.E. 464 Oil Shale Mining Company's first retort, on Dry Fork, west of De Beque, men providing scale. Mesa County, Colorado.n.d. Plate 13-b in U.S. Geological Survey Bulletin 729. 1923. #1:/Winchester D.E. Collection-American Shale Refining Company/winc0470 ID. Winchester, D.E. 470 Shale retort of the American Shale Refining Company, on Conn Creek T. 7 S.,R. 97 W., Garfield County, Colorado. August 1917. #1:/Winchester D.E. Collection-Mount Logan Oil Shale Plant/winc0522 ID. Winchester, D.E. 522 Looking up at Mount Logan oil shale plant. De Beque, Garfield County, Colorado. Colorado. June 1918. #1:/Winchester D.E. Collection-Oil Shale Mining Company/winc526a ID. Winchester, D.E. 526a Shale Retort of Oil Shale Mining Company on Dry Fork, T.7 S.,R.100W. Garfield County, Colorado. June 1918. #1:/Woodruff E.G. Collection-Rainbow Gilsonite Mine/weg00185 ID. Woodruff, E.G. 185 Rainbow Gilsonite Mine near top of open cut, Near Watson, Uintah, Utah. 1913. #1:/Woodruff E.G. Collection-Rainbow Gilsonite Mine/weg00186 ID. Woodruff, E.G. 186 Rainbow Gilsonite Mine about 75 feet below surface in open cut, near Watson. Uintah County, Utah. 1913 #1:/Woodruff E.G. Collection-Black Dragon Gilsonite Mine/weg00187 ID. Woodruff, E.G. 187 Looking northwest across trail canyon at Black Dragon gilsonite mine, near Dragon Mine. Uintah County, Utah. 1913. #1:/Woodruff E.G. Collection-Country Boy Gilsonite Claim/weg00188 ID. Woodruff, E.G. 188 Looking northwest on Country Boy gilsonite claim, near Watson. Uintah County, Utah. 1913. #1:/Woodruff E.G. Collection-Rainbow Gilsonite Mine/weg00189 ID. Woodruff, E.G. 189 Prospect on Pigeon Toe gilsonite claim, Rainbow mine, near Watson. Uintah County, Utah. 1913. #1:/Woodruff E.G. Collection-Rainbow Gilsonite Mine/weg00190 ID. Woodruff, E.G. 190 Gilsonite veins, Norwell claim of rainbow lode, looking northwest toward Thimble Rock. Three-fourths mile southeast of Rainbow Mine, near Watson. Uintah County, Utah. 1913. #1:/Woodruff E.G. Collection/weg00192 ID. Woodruff, E.G. 192 Prospect on Rainbow Lode. Gilsonite vein about 8 feet wide, near Watson. Uintah County, Utah. 1913. #1:/Woodruff E.G. Collection/weg00193 ID. Woodruff, E.G. 193 Gilsonite Prospect on Harrison claim, Black Dragon Lode, near Watson. Uintah County, Utah. 1913. #1:/Woodruff E.G. Collection-Black Dragon Gilsonite Mine/weg00194 ID. Woodruff, E.G. 194 Black Dragon gilsonite mine at Dragon. Uintah County, Utah. 1913. #1:/Woodruff E.G. Collection-Black Dragon Gilsonite Mine/weg00195 ID. Woodruff, E.G. 195 Black Dragon gilsonite mine, Dragon. Uintah County, Utah. 1913. #1:/Woodruff E.G. Collection/weg00197 ID. Woodruff, E.G. 197 Prospect tunnel on Utah claim of Bonanza lode, near Bonanza, ore is all in pencillated form. Bonanza quadrangle. Uintah County, Utah. 1913. #1:/Woodruff E.G. Collection-Big Bonanza Mine/weg00198 ID. Woodruff, E.G. 198 Whim and sacked gilsonite ore at Big Bonanza Mine, Bonanza. Bonanza quadrangle. Uintah County, Utah. 1913. #1:/Weis P. Collection/wei00003 ID. Weis, P. 3ct Lookout Mountain Missoula. Showing wave cut shorelines of glacial Lake Missoula on Sentinal Mountain. The lake once had a depth of 950 feet where the University of Montana stadium now stands. Missoula County. Montana.n.d. #1:/Weis P. Collection/wei00019 ID. Weis, P. 19ct Oblique aerial view of giant ripple marks at Newman Lake. Spokane County, Washington ca. 1970. #1:/Idaho Collection/wei00022 ID. Weis, P. 22ct Idaho. Giant ripple marks near Delta in Shoshone County. Circa 1970. #1:/Weis P. Collection/wei00025 ID. Weis, P. 25ct Oblique aerial view of giant ripple marks. Montana. ca. 1970. #1:/Weis P. Collection/wei00032 ID. Weis, P. 32ct Titon Valley, Columnar Basalt Flows. Yakama County, Washington, 1970. #1:/Weis P. Collection/wei00034 ID. Weis, P. 34ct Basalt and Latah Formation (clay deposits) contact, south of Spokane. Spokane County, Washington. ca. 1970. #1:/Weis P. Collection/wei00047 ID. Weis, P. 47ct Erratic near Lake Willamette, deposited by glacial(?) flood. Hat for scale. Washington.n.d. #1:/Weis P. Collection/wei00074 ID. Weis, P. 74ct Weathering basalt, Asotin. Asotin County, Washington. ca. 1970. #1:/Weis P. Collection/wei00083 ID. Weis, P. 83ct Glacial polish on rock along Pines Road. Washington. ca. 1970 #1:/Death Valley National Park/wfb00054 ID. Weeks, F.B. 54 Death Valley National Park, California. Sand Springs at the north end of Death Valley. View is to the south. September 11, 1900. #1:/Death Valley National Park/wfb00055 ID. Weeks, F.B. 55 Death Valley National Park, California. Mountains at the north end of Death Valley, probably the south end of the Silver Peak Range. September 10, 1900. #1:/Death Valley National Park/wfb00057 ID. Weeks, F.B. 57 Death Valley National Park, California. Slightly north of Grapevine Spring. Range on the east side of Death Valley, showing eruptives. 1900. #1:/Death Valley National Park/wfb00058 ID. Weeks, F.B. 58 Death Valley National Park, California. Mouth of a canyon 3 miles south of Grapevine Springs on the east slope of the Panamint Range west of Grapevine Peak. September 14, 1900. #1:/Death Valley National Park/wfb00059 ID. Weeks, F.B. 59 Death Valley National Park, California. Half a mile east of the entrance to Cottonwood Canyon in the Panamint Range south of Cottonwood Canyon. September 15, 1900. #1:/Death Valley National Park/wfb00060 ID. Weeks, F.B. 60 Death Valley National Park, California. Ten miles south of Furnace Creek on the east slope of the Panamint Range. Road crossing Death Valley in the right foreground. October 11, 1900. #1:/Death Valley National Park/wfb00061 ID. Weeks, F.B. 61 Death Valley National Park, California. West slope of Funeral Mountains, viewed from 10 miles south of Furnace Creek, possibly looking directly east from photo wfb00060. October 11, 1900. #1:/Death Valley National Park/wfb00062 ID. Weeks, F.B. 62 Death Valley National Park, California. Survey party en route up Death Valley after a rain, 10 miles south of Furnace Creek. October 12, 1900. #1:/Death Valley National Park/wfb00063 ID. Weeks, F.B. 63 Death Valley National Park, California. Survey party camped at Furnace Creek Ranch. Wash from heavy rains with the Amargosa Range in the background. October 13, 1900. #1:/Death Valley National Park/wfb00064 ID. Weeks, F.B. 64 Death Valley National Park, California. Across rangeland at Furnace Creek after a rainstorm. October 13, 1900. #1:/Death Valley National Park/wfb00065 ID. Weeks, F.B. 65 Death Valley National Park, California. Toward the west slope of the Amargosa Range from Furnace Creek Ranch. Borax lake beds in the foreground. Limestone and quartzite in the high peak. October 13, 1900. #1:/Death Valley National Park/wfb00066 ID. Weeks, F.B. 66 Death Valley National Park, California. High mountain on the west side of Death Valley, viewed from the center of the valley, somewhat south of Grapevine Springs, showing long slope on the north side of the mountain. September 12, 1900. #1:/Weeks F.B. Collection-Sioux Claim/wfb00239 ID. Weeks, F.B. 239 Open face on north end of Sioux lode claim. Mr. Jewetts standing on foot wall, holding hammer on hanging wall four feet. Crawford Mountains, Rich County, Utah. September 9, 1907. #1:/Weeks F.B. Collection-Lorine Claim/wfb00241 ID. Weeks, F.B. 241 Tunnel on Lorine claim. Crawford Mountains, Rich County, Utah. September 10, 1907. #1:/Weeks F.B. Collection-Dunnellon Claim/wfb00242 ID. Weeks, F.B. 242 Tunnel on Dunnellon claim. Crawford Mountains, Rich County, Utah. September, 10, 1907. #1:/Weeks F.B. Collection-Dunnellon Claim/wfb00244 ID. Weeks, F.B. 244 Showing phosphate series at Dunnellon lode. Crawford Mountains, Rich County, Utah. September 10, 1907. #1:/Weeks F.B. Collection/wfb00245 ID. Weeks, F.B. 245 Shows phosphate series at Choctaw tunnel. Crawford Mountains, Rich County, Utah. September 10, 1907. #1:/Weeks F.B. Collection/wfb00248 ID. Weeks, F.B. 248 Brown phosphate in open cut, stripping of gray phosphate above two tunnels and Productus limestone outcrop above. Crawford Mountains north side of Frazer Canyon, Rich County, Utah. September 10, 1907. #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg000045 ID. Wheeler, 45 Mirror Bar at the Black Canyon of the Colorado River in Nevada.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg000046 ID. Wheeler, 46 Mountain peak near Belmont, Nevada.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg000047 ID. Wheeler, 47 Looking down the Colorado River from Pariena Crossing.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg000048 ID. Wheeler, 48 Crater of an extinct volcano near San Francisco Mountain in Arizona.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg000049 ID. Wheeler, 49 Soldiers' quarters at Camp Apache, Arizona.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg000050 ID. Wheeler, 50 Section of the officers' quarters at Camp Whipple, Arizona.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg000051 ID. Wheeler, 51 Spanish inscription on Inscription Rock at El Morro National Monument in New Mexico.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg000052 ID. Wheeler, 52 Officers' quarters at Camp Apache, Arizona.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg000053 ID. Wheeler, 53 Shoshone Falls in Idaho, 210 feet from level to level. The canyon is 100 feet deep.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg000054 ID. Wheeler, 54 Upper Colorado camp. Walls are 600 feet.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg000055 ID. Wheeler, 55 Rocket Peak at the Grand Canyon of the Colorado River in Arizona.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg000056 ID. Wheeler, 56 Quartermaster's storehouse at Camp Whipple, Arizona. Photo by T.H. O'Sullivan. U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg000057 ID. Wheeler, 57 Officers' quarters at Camp Hallech, Nevada.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg000058 ID. Wheeler, 58 Hyko Hot Springs, Nevada.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg000059 ID. Wheeler, 59 Summit Mine at Belmont, Nevada. Photo by T.H. O'Sullivan.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg000060 ID. Wheeler, 60 Fortification Rock at the Grand Canyon of the Colorado River in Arizona.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1871 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg000061 ID. Wheeler, 61 Bad Lands in Wyoming.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg000062 ID. Wheeler, 62 Shivwitz Crossing on the Colorado River in Arizona.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1872 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg000063 ID. Wheeler, 63 Humboldt Mountain in Nevada. Photo by T.H. O'Sullivan.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg000064 ID. Wheeler, 64 Bluff below Shoshone Falls, 800 feet high, on the Snake River in Idaho. Photo by T.H. O'Sullivan.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg000065 ID. Wheeler, 65 Quartz mill in Meadow Valley near Peioch, Nevada.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg000066 ID. Wheeler, 66 Men's quarters at Camp Majove, Arizona.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg000067 ID. Wheeler, 67 Mouth of the Black Canyon of the Colorado River in Nevada.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg000068 ID. Wheeler, 68 Grand Canyon of the Colorado River above Paria, Arizona.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg000069 ID. Wheeler, 69 Summit Mine near Belmont, Nevada.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg000070 ID. Wheeler, 70 Mouth of Paria Canyon on the Colorado River in Arizona.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg000071 ID. Wheeler, 71 Commanding officer's quarters at Camp Majove, Arizona.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg000072 ID. Wheeler, 72 Columnar basalt at the mouth of Grand Wash in Arizona. Photo by T.H. O'Sullivan.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1871 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg000073 ID. Wheeler, 73 Middle of the Black Canyon in Nevada, looking down stream.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg000074 ID. Wheeler, 74 Head of Paria Canyon in Utah.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg000075 ID. Wheeler, 75 Mountain view near Salt Lake City, Utah.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg000076 ID. Wheeler, 76 Part of Owen Valley, California, 150 feet below sea level. Mount Humphrey in the Sierra Nevada Mountains in the background.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg000077 ID. Wheeler, 77 Part of Santa Fe County, New Mexico.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg000078 ID. Wheeler, 78 Grand Canyon, looking below the mouth of the Diamond River in Arizona. Photo by T.H. O'Sullivan.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1871 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg000079 ID. Wheeler, 79 Cathedral Mesa on the Colorado River in Arizona. Photo by T.H. O'Sullivan. U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1871 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg000080 ID. Wheeler, 80 Table Mountain above the Black Canyon of the Colorado River in Nevada. Photo by T.H. O'Sullivan.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1871 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg000081 ID. Wheeler, 81 Light and shadow in the Black Canyon of the Colorado river in Nevada, viewed from Mirror Bar. Photo by T.H. O'Sullivan.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1871 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg000082 ID. Wheeler, 82 Eroded strata near Cottonwood Springs, Nevada. Photo by T.H. O'Sullivan.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1871 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg187101 ID. Wheeler 1871, 1 Snow Peaks in Bull Run mining district in Nevada. Photo by T.H. O'Sullivan. U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1871 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg187102 ID. Wheeler 1871, 2 Group of Pah-Ute (Paiute) Indians in Nevada. Photo by T.H. O'Sullivan. U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1871 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg187103 ID. Wheeler 1871, 3 Bluff opposite Big Horn Camp in Black Canyon on the Colorado River in Nevada. Photo by T.H. O'Sullivan.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1871 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg187104 ID. Wheeler 1871, 4 Black Canyon of the Colorado River, looking below from Big Horn Camp in Nevada. Photo by T.H. O'Sullivan.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1871 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg187105 ID. Wheeler 1871, 5 Black Canyon of the Colorado River, looking above from Camp 7 in Nevada. Photo by T.H. O'Sullivan.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1871 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg187106 ID. Wheeler 1871, 6 Black Canyon of the Colorado River, looking below from Camp 7 in Nevada. Photo by T.H. O'Sullivan.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1871 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg187107 ID. Wheeler 1871, 7 Black Canyon of the Colorado River, looking below Camp 8 in Nevada. Photo by T.H. O'Sullivan.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1871 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg187108 ID. Wheeler 1871, 8 Black Canyon of the Colorado River, looking above from Camp 8 in Nevada. Photo by T.H. O'Sullivan.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1871 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg187109 ID. Wheeler 1871, 9 Black Canyon of the Colorado River, looking down from Mirror Bar in Nevada. Photo by T.H. O'Sullivan.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1871 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg187110 ID. Wheeler 1871, 10 Entrance to the Black Canyon of the Colorado River in Nevada. Photo by T.H. O'Sullivan.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1871 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg187111 ID. Wheeler 1871, 11 Wall in the Grand Canyon. Photo by T.H. O'Sullivan.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1871 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg187112 ID. Wheeler 1871, 12 Saguaro cactus in Arizona. Photo by T.H. O'Sullivan.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1871 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg187113 ID. Wheeler 1871, 13 Water rhyolite near Logan Springs, Nevada. Photo by T.H. O'Sullivan.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1871 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg187114 ID. Wheeler 1871, 14 Rock carved by drifting sand below Fortification Rock in Arizona. Photo by T.H. O'Sullivan.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1871 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg187115 ID. Wheeler 1871, 15 Iceberg Canyon on the Colorado River in Nevada. Photo by T.H. O'Sullivan. U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1871 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg187116 ID. Wheeler 1871, 16 Alpine Lake in the Sierra Nevada Mountains of California. Photo by T.H. O'Sullivan.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1871 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg187201 ID. Wheeler 1872, 1 Canyon of Kanab Wash in Arizona or Utah, looking south. Photo by W. Bell. U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1872 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg187202 ID. Wheeler 1872, 2 Canyon of Kanab Wash in Arizona or Utah, looking north. Photo by W. Bell. U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1872 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg187203 ID. Wheeler 1872, 3 Canyon of Kanab Wash in Arizona or Utah, looking south. Photo by W. Bell. U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1872 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg187204 ID. Wheeler 1872, 4 Canyon of Kanab Wash in Arizona or Utah, looking south. Photo by W. Bell. U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1872 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg187205 ID. Wheeler 1872, 5 Mouth of Kanab Wash in Arizona or Utah, looking west. Photo by W. Bell.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1872 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg187206 ID. Wheeler 1872, 6 Grand Canyon of the Colorado River near Paria Creek in Arizona, looking west. Photo by W. Bell.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1872 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg187207 ID. Wheeler 1872, 7 Grand Canyon of the Colorado River near Paria Creek in Arizona, looking west. Photo by W. Bell.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1872 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg187208 ID. Wheeler 1872, 8 Grand Canyon of the Colorado River near Paria Creek in Arizona, looking west. Photo by W. Bell.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1872 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg187210 ID. Wheeler 1872, 10 Rain sculpture in Salt Creek Canyon in Utah. Photo by W. Bell.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1872 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg187211 ID. Wheeler 1872, 11 Grand Canyon of the Colorado River at the mouth of Kanab Wash in Arizona, looking west. Photo by W. Bell.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1872 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg187212 ID. Wheeler 1872, 12 Grand Canyon of the Colorado River at the mouth of Kanab Wash in Arizona, looking east. Photo by W. Bell.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1872 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg187214 ID. Wheeler 1872, 14 Perched Rock at Rocker Creek in Arizona. Photo by W. Bell.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1872 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg187215 ID. Wheeler 1872, 15 Limestone walls on Kanab Wash in Arizona or Utah. Photo by W. Bell.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1872 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg187301 ID. Wheeler 1873, 1 Apache Lake in the Sierra Blanca Range in Arizona. Photo by T.H. O'Sullivan. U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1873 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg187302 ID. Wheeler 1873, 2 Apache Lake in the Sierra Blanca Range in Arizona. Photo by T.H. O'Sullivan. U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1873 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg187303 ID. Wheeler 1873, 3 Apache Lake in the Sierra Blanca Range in Arizona. Two Apache scouts in the foreground. Photo by T.H. O'Sullivan.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1873 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg187304 ID. Wheeler 1873, 4 North Fork Canyon on Sierra Blanca Creek in Arizona. Photo by T.H. O'Sullivan. U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1873 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg187305 ID. Wheeler 1873, 5 Cooley's Park in the Sierra Blanca Range in Arizona. Photo by T.H. O'Sullivan. U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1873 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg187306 ID. Wheeler 1873, 6 Camp Apache, Arizona. Photo by T.H. O'Sullivan.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1873 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg187308 ID. Wheeler 1873, 8 Historic Spanish record of the Conquest on the south side of Inscription Rock at El Morro National Monument in New Mexico. Photo by T.H. O'Sullivan.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1873 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg187309 ID. Wheeler 1873, 9 Historic Spanish record of the Conquest on the south side of Inscription Rock at El Morro National Monument, New Mexico. Photo by T.H. O'Sullivan.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1873 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg187313 ID. Wheeler 1873, 13 Canyon of the Colorado River near the mouth of the San Juan River in Arizona. Photo by T.H. O'Sullivan.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1873 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg187314 ID. Wheeler 1873, 14 South side of Inscription Rock at El Morro National Monument, New Mexico. Photo by T.H. O'Sullivan.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1873 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg187315 ID. Wheeler 1873, 15 Canyon De Chelly in Arizona. Walls of the Grand Canyon are about 1200 feet high. Photo by T.H. O'Sullivan.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1873 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg187316 ID. Wheeler 1873, 16 Head of Canyon De Chelly in Arizona. The walls are about 1200 feet high. Photo by T.H. O'Sullivan.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1873 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg187318 ID. Wheeler 1873, 18 Old Mission Church in the Zuni Pueblo in New Mexico, viewed from the plaza. Photo by T.H. O'Sullivan.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1873 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg187319 ID. Wheeler 1873, 19 Section of the south side of the Zuni Pueblo in New Mexico. Photo by T.H. O'Sullivan.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1873 Expedition). #1:/U.S. Geographical Surveys West of the 100th Meridian (G. Wheeler Survey)/wg18737a ID. Wheeler 1873, 7a Life among the Navajo Indians near old Fort Defiance, New Mexico. Photo by T.H. O'Sullivan. U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey, 1873 Expedition). #1:/Grand Canyon National Park/wheel055 ID. Photo. no. 55 Grand Canyon National Park, Arizona. Rocket Peak.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey). #1:/Grand Canyon National Park/wheel060 ID. Photo. no. 60 Grand Canyon National Park, Arizona. Fortification Rock. 1871.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey). #1:/Grand Canyon National Park/wheel068 ID. Photo. no. 68 Grand Canyon National Park, Arizona. Grand Canyon above Paria.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey). #1:/Grand Canyon National Park/wheel078 ID. Photo. no. 78 Grand Canyon National Park, Arizona. Grand Canyon, looking below the mouth of Diamond River. Photo by T.H. O'Sullivan, 1871.U.S. Geographical Surveys West of the One Hundredth Meridian (Wheeler Survey). #1:/Loma Prieta, California, Earthquake October 17, 1989/whg00001 ID. Wilshire, H.G. 1ct Loma Prieta, California, Earthquake October 17, 1989. Oakland. Collapsed sections of the Cypress viaduct of Interstate 880. Slide III-1, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/whg00002 ID. Wilshire, H.G. 2ct Loma Prieta, California, Earthquake October 17, 1989. Oakland. Collapsed section of the Cypress viaduct of Interstate 880. 1989. Slide III-2, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/whg00003 ID. Wilshire, H.G. 3ct Loma Prieta, California, Earthquake October 17, 1989. Oakland. Support column failure and collapsed upper deck on the Cypress viaduct of Interstate 880. Slide III-5, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/whg00004 ID. Wilshire, H.G. 4ct Loma Prieta, California, Earthquake October 17, 1989. Oakland. Support column failure and collapsed upper deck on the Cypress viaduct of Interstate 880. Slide III-6, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/whg00005 ID. Wilshire, H.G. 5ct Loma Prieta, California, Earthquake October 17, 1989. Oakland. Bent reinforcement bars in a failed support column on the Cypress viaduct of Interstate 880. Slide III-7, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/whg00006 ID. Wilshire, H.G. 6ct Loma Prieta, California, Earthquake October 17, 1989. Oakland. Pancaked upper deck of the Cypress viaduct of Interstate 880. Guardrail on the right is on the lower deck. Slide III-8, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/whg00007 ID. Wilshire, H.G. 7ct Loma Prieta, California, Earthquake October 17, 1989. Oakland. Damaged reinforcement base from a support column of the Cypress viaduct of Interstate 880. 1989. Slide III-9, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/whg00008 ID. Wilshire, H.G. 8ct Loma Prieta, California, Earthquake October 17, 1989. Oakland. Sheared reinforcement bar of the Cypress viaduct of Interstate 880. Slide III-10, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/whg00009 ID. Wilshire, H.G. 9ct Loma Prieta, California, Earthquake October 17, 1989. Oakland. Temporary support structures placed to prevent further collapse of the Cypress viaduct of Interstate 880. Slide III-11, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/whg00010 ID. Wilshire, H.G. 10ct Loma Prieta, California, Earthquake October 17, 1989. Fremont Baylands. KGO radio transmission towers, built on Bay mud in a salt evaporation pond used by Leslie Salt Company. Note progressively less damage to the towers with increased distance from the viewer. Slide V-1, U.S. Geological Survey Open- File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/whg00011 ID. Wilshire, H.G. 11ct Loma Prieta, California, Earthquake October 17, 1989. Fremont Baylands. KGO radio transmission towers. Slide V-2, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/whg00012 ID. Wilshire, H.G. 12ct Loma Prieta, California, Earthquake October 17, 1989. Los Altos. Collapsed five-story tower at St. Joseph's Seminary. One person working in the tower was killed. 1989. Slide VII-1, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/whg00013 ID. Wilshire, H.G. 13ct Loma Prieta, California, Earthquake October 17, 1989. Los Altos. Collapsed five-story tower at St. Joseph's Seminary. Slide VII-2, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/whg00014 ID. Wilshire, H.G. 14ct Loma Prieta, California, Earthquake October 17, 1989. Los Gatos. Failure of the porch on a frame house. Slide VIII-7, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/whg00015 ID. Wilshire, H.G. 15ct Loma Prieta, California, Earthquake October 17, 1989. Summit Road area in the Santa Cruz Mountains. Crack system with 1.2 meters (4 feet) of vertical displacement across a clay tennis court west of Summit Road, southeast of Highway 17. The fracture passes across a retaining wall and upslope beyond view. Slide IX-1, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/whg00016 ID. Wilshire, H.G. 16ct. Loma Prieta, California, Earthquake October 17, 1989. Santa Cruz Area. Collapsed wall of unreinforced masonry of the Medico Dental Building in the Pacific Garden Mall. 1989. Slide XIII-10, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/whg00017 ID. Wilshire, H.G. 17ct. Loma Prieta, California, Earthquake October 17, 1989. Watsonville area. Broken utility lines in a house that shifted off its foundation in downtown Watsonville. 1989. Slide XIV-8, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/whg00018 ID. Wilshire, H.G. 18ct Loma Prieta, California, Earthquake October 17, 1989. Watsonville area. Support column of the bridge across Struve Slough on Highway 1. Enlargement of the hole where the support enters the ground is an effect of lateral shaking. This caused the concrete to break up where the column joined the bridge and was instrumental in the roadbed collapse. 1989. Slide XIV-14, U.S. Geological Survey Open-File Report 90-547. #1:/Loma Prieta, California, Earthquake October 17, 1989/whg00019 ID. Wilshire, H.G. 19ct Loma Prieta, California, Earthquake October 17, 1989. Watsonville area. Support columns of the Highway 1 bridge across Struve Slough protrude through the roadbed. This resulted from the collapse of the roadbed after the effects of lateral shaking. Slide XIV-15, U.S. Geological Survey Open-File Report 90-547. #1:/Hebgen Lake, Montana, Earthquake August 1959/wij00002 ID. Witkind, I.J. 2ct Hebgen Lake, Montana, Earthquake August 1959. Red Canyon fault scarp along the south flank of Kirkwood Ridge. Downthrown block of ground is in the lower left corner. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/wij00003 ID. Witkind, I.J. 3ct Hebgen Lake, Montana, Earthquake August 1959. Red Canyon fault scarp where it cuts through Blarneystone Ranch. The house sits on down thrown block. The fault scarp here is 10 to 12 feet high. A small collapsed shed (green roof) is on the relatively upthrown block. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/wij00004 ID. Witkind, I.J. 4ct Hebgen Lake, Montana, Earthquake August 1959. Red Canyon fault scarp where it cuts through Blarneystone Ranch. Downthrown block of ground shows on the left. The water which inundates the pasture land is from disrupted Grayling Creek. Relatively upthrown block of ground is on the right. The collapsed shed can be seen near the trees in the upper right corner. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/wij00005 ID. Witkind, I.J. 5ct Hebgen Lake, Montana, Earthquake August 1959. Access road cut by the Red Canyon fault scarp. Downthrown block of ground is in the foreground. Relatively upthrown block of ground is crossed by the road. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/wij00006 ID. Witkind, I.J. 6ct Hebgen Lake, Montana, Earthquake August 1959. Small buckled fence along Montana State Highway 499 (former State Highway 287). A small earth slump from the hill showing on the right compressed the fence and buckled it. Hebgen Lake to the left just beyond the fields. Madison Range in the background. August 1959, #1:/Hebgen Lake, Montana, Earthquake August 1959/wij00007 ID. Witkind, I.J. 7ct Hebgen Lake, Montana, Earthquake August 1959. Hebgen fault scarp where it crosses the crest of Bost Mountain near Hebgen Dam. Man is standing on downthrown block of ground. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/wij00009 ID. Witkind, I.J. 9ct Hebgen Lake, Montana, Earthquake August 1959. Seiche marks on the walls of one of the motel units at Hilgard Lodge. These water marks indicate the height and number of waves which passed this particular site. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/wij00011 ID. Witkind, I.J. 11ct Hebgen Lake, Montana, Earthquake August 1959. Emergent mud flats along the south fork of the Madison River. Hebgen Lake has been displaced northeastward (lower left), and these emergent mud flats are the result. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/wij00017 ID. Witkind, I.J. 17ct Hebgen Lake, Montana, Earthquake August 1959. Part of former Highway 287 where it disappears beneath the north end of Earthquake Lake. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/wij00018 ID. Witkind, I.J. 18ct Hebgen Lake, Montana, Earthquake August 1959. North end of Earthquake Lake. The trees to a level of about 50 feet above the present surface of Earthquake Lake were once inundated for about 30 days while the Corps of Engineers constructed a new spillway across the Madison slide. The water was then let down to its present level. During this time the trees below the water level died, and the water mark is clearly visible as a dark gray line. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/wij00019 ID. Witkind, I.J. 19ct Hebgen Lake, Montana, Earthquake August 1959. This pump formerly sat on its concrete base. At the time of the earthquake, water and sand were forced up the casing and played against the base of the pump gradually raising it some 8 inches above its former position. The sand shows as light tan; the concrete base is light gray. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/wij00020 ID. Witkind, I.J. 20ct Hebgen Lake, Montana, Earthquake August 1959. Red Canyon fault scarp along the south flank of Kirkwood Ridge. Taken near the divide between the west fork of Red Canyon and the head of Kirkwood. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/wij00026 ID. Witkind, I.J. 26ct Hebgen Lake, Montana, Earthquake August 1959. Red Canyon fault scarp as exposed along the south flank of Kirkwood Ridge near the head of Kirkwood Creek. The fault scarp here is wholly in colluvial debris. Part of the slickensides have been chopped away to show the general texture of the material. The slickensides dip downslope, reflecting direction of the movement of the colluvium. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/wij00027 ID. Witkind, I.J. 27ct Hebgen Lake, Montana, Earthquake August 1959. Part of the slickensides, shown in photo wij00026, have been chopped away to show the general texture of the material. The fault scarp here is wholly in colluvial debris. The slickensides dip downslope, reflecting the direction of the movement of the colluvium exposed along the south flank of Kirkwood Ridge near the head of Kirkwood Creek. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/wij00031 ID. Witkind, I.J. 31ct Hebgen Lake, Montana, Earthquake August 1959. Red Canyon fault scarp near the Blarneystone Ranch. Subsidence zone of downthrown block partly submerged by waters of Grayling Creek shows on the right. Note the disrupted fence. View is eastward from the top of upthrown block. August 1959 #1:/Hebgen Lake, Montana, Earthquake August 1959/wij00032 ID. Witkind, I.J. 32ct Hebgen Lake, Montana, Earthquake August 1959. Red Canyon fault scarp at Blarneystone Ranch. Green roof on upthrown block marks the position of the shattered storage shed. Long blue roof is part of the servants' quarters of Blarneystone Ranch. The fault scarp ends in the small grove of aspen which shows just beyond the blue roof. A small access road has been bulldozed across the fault scarp. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/wij00033 ID. Witkind, I.J. 33ct Hebgen Lake, Montana, Earthquake August 1959. Red Canyon fault scarp at the Blarneystone Ranch. These damaged buildings once served as the servants' quarters. The road in the foreground was bulldozed across the fault scarp shortly after the earthquake. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/wij00035 ID. Witkind, I.J. 35ct Hebgen Lake, Montana, Earthquake August 1959. Cracked foundation of the main residence of the Blarneystone Ranch. View is westward and was taken on the downthrown block. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/wij00041 ID. Witkind, I.J. 41ct Hebgen Lake, Montana, Earthquake August 1959. Slickensides on the Red Canyon fault scarp. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/wij00044 ID. Witkind, I.J. 44ct Hebgen Lake, Montana, Earthquake August 1959. Small longitudinal step fault scarps formed along the trace of Hebgen fault. These small step faults are along the south flank of Mount Hebgen, about half a mile northeast of Hebgen Dam. All scarps are in colluvium. View is northward. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/wij00082 ID. Witkind, I.J. 82ct Hebgen Lake, Montana, Earthquake August 1959. Slump of former State Highway 287 into Hebgen Lake. Highway 287 followed the north shore of Hebgen Lake. In several places, large masses of sediment, saturated by crater, slumped into the lake. View is southeastward. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/wij00084 ID. Witkind, I.J. 84ct Hebgen Lake, Montana, Earthquake August 1959. Slump of former State Highway 287 into Hebgen Lake. The main residence of Hilgard Lodge is almost wholly submerged in the lake. View is northwestward. August 1979. #1:/Hebgen Lake, Montana, Earthquake August 1959/wij00085 ID. Witkind, I.J. 85ct Hebgen Lake, Montana, Earthquake August 1959. North shore of Hebgen Lake showing slumps which carried parts of Highway 287 into the lake. One of the large alcoves can been seen in the center. This alcove is shown in more detail in wij00084. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/wij00087 ID. Witkind, I.J. 87ct Hebgen Lake, Montana, Earthquake August 1959. One of the large cracks in the concrete retaining wall of Hebgen Dam. The retaining wall, which is about 16 inches thick at the top and about 27 inches thick at the base, had a great many cracks in it, of which three or four were as large as this one. The retaining wall slumped, tilted forward, and was fractured during the earthquake. Water seeped through these fractures. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/wij00089 ID. Witkind, I.J. 89ct Hebgen Lake, Montana, Earthquake August 1959. One wall of the spillway. This view, taken in 1960 when a new spillway was being constructed across Hebgen Dam, shows many of the fractures and breaks formed in the old spillway during the earthquake. 1960. #1:/Hebgen Lake, Montana, Earthquake August 1959/wij00092 ID. Witkind, I.J. 92ct Hebgen Lake, Montana, Earthquake August 1959. Madison Slide. View is southward and shows both the source area of the slide (in the upper center) and slide debris (in the lower left corner) which moved down the slope, across the river, and up the north valley wall. This light-colored debris, composed of dolomite, formed the leading edge of the slide. Comparable dolomite which was not broken and did not fall shows at right center as a small dolomite buttress. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/wij00103 ID. Witkind, I.J. 103 Hebgen Lake, Montana, Earthquake August 1959. Overall view of the Madison River slide from the Earthquake Lake side. The main mass of the slide covered by trees and soil is in the center. The dolomite debris that acted as the leading edge of the slide is at right center. The source area of the slide is in the upper left corner with the steeply dipping schist beds showing along the ridge line. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/wij00106 ID. Witkind, I.J. 106ct Hebgen Lake, Montana, Earthquake August 1959. Earthquake Lake with both its present level and its former level marked by a zone of dead needles. A partly submerged house still shows in the center. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/wij00108 ID. Witkind, I.J. 108ct Hebgen Lake, Montana, Earthquake August 1959. Southeastward view of the source area of the Madison Slide. This view shows several of the unbroken dolomite remnants. It was dolomite buttresses comparable to these which broke and resulted in the slide. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/wij00119 ID. Witkind, I.J. 119ct Hebgen Lake, Montana, Earthquake August 1959. This is a typical sight throughout much of the earthquake area. As a result of the earthquake, many of the stone chimneys were shaken down, although the log cabins were relatively undamaged. The glass in the log cabins was unbroken. This particular cabin is in Red Canyon Creek near its mouth and was on the downthrown block. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/wij00124 ID. Witkind, I.J. 124ct Hebgen Lake, Montana, Earthquake August 1959. One of the large boulders shaken loose by the earthquake which rolled down the slope to come to rest on the alluvial flats. August 1959. #1:/Hebgen Lake, Montana, Earthquake August 1959/wij00135 ID. Witkind, I.J. 135ct Hebgen Lake, Montana, Earthquake August 1959. Sand volcanoes formed near the Parade Rest Ranch. The wooded patch in the background marks the course of Grayling Creek. August 1959. #1:/Yellowstone National Park/wij00278 ID. Witkind, I.J. 278ct Yellowstone National Park, Wyoming. Lower Falls of the Grand Canyon of the Yellowstone. 1969. #1:/Yellowstone National Park/wij00279 ID. Witkind, I.J. 279ct Yellowstone National Park, Wyoming. Lower Falls of the Grand Canyon of the Yellowstone. 1969. #1:/Yellowstone National Park/wij00280 ID. Witkind, I.J. 280ct Yellowstone National Park, Wyoming. Lower Falls of the Yellowstone River, viewed from Artist Point. 1969. #1:/Witkind I.J. Collection/wij00334 ID. Witkind, I.J. 334ct Pebble conglomerate of the Pilgrim Limestone exposed along the crest of Sheepherders Ridge, Henrys Lake Mountains. Gallatin County, Montana. 1969. #1:/Canyon de Chelly National Monument/wij00673 ID. Witkind, I.J. 673 Canyon de Chelly National Monument, Arizona. White House ruins. Circa 1952. #1:/Hebgen Lake, Montana, Earthquake August 1959/wij00682 ID. Witkind, I.J. 682 Hebgen Lake, Montana, Earthquake August 1959. Seiche marks on the walls of a unit at Hilgard Lodge. These water marks indicate the height and number of waves which passed this particular site. August 1959. #1:/Grand Teton National Park/wij00719 ID. Witkind, I.J. 719 Grand Teton National Park, Wyoming. Grand Tetons. 1960. #1:/Grand Teton National Park/wij01262 ID. Witkind, I.J. 1262 Grand Teton National Park, Wyoming. West to the Teton Range, viewed from near Moran Junction. The mountains are within the park. 1973. #1:/Grand Teton National Park/wij01265 ID. Witkind, I.J. 1265 Grand Teton National Park, Wyoming. Southwest to Grand Teton peak, viewed from the Snake River Overlook. Snake River in the foreground. 1973. #1:/Hebgen Lake, Montana, Earthquake August 1959/wijb0030 ID. Witkind, I.J. 30 Hebgen Lake, Montana, Earthquake August 1959. Red Canyon fault scarp on the east valley wall of the Red Canyon. Geologist is standing on the downthrown block looking at a slab of the Madison Group on which there are excellent striae. Figure 19-A, U.S. Geological Survey Professional Paper 435-G. #1:/Witkind I.J. Collection/wijb0791 ID. Witkind, I.J. 791 Cambrian strata exposed in south flank of Bacon Rind cirque, showing the general mode of outcrop of the Flathead Sandstone, the Wolsey Shale and the Meagher Limestone. Rockfalls at the base of the Meagher have nearly covered the Wolsey Shale. Gallatin County, Montana. ca. 1960. Figure 3 in U.S. Geological Survey. Professional paper 609. 1969. #1:/Witkind I.J. Collection/wijc0047 ID. Witkind, I.J. 47cp Exposure of conglomerate in the Colton Formation at the southern end of the hogback north of ancestral Willow Creek. Beds areal most vertical. Exposure is in the NW 1/4. sec. 3, T. 21 S., R. 1 E. Sevier County, Utah. Spring 1980. #1:/Witkind I.J. Collection/wijc0074 ID. Witkind, I.J. 74cp A small "s" fold in Arapien Shale beds in Gardner Canyon. View is northward and the attitude of the fold suggests that the axial plane dips eastward, implying vertical uplift. Exposure is in sec. 22, T. 12 S., R. 1 E., near Nephi. Hammer for scale. Juab County, Utah. 1982. #1:/Witkind I.J. Collection/wijc0082 ID. Witkind, I.J. 82cp Wasatch fault scarp expressed in the slickensided Oquirrh beds. The tilt of the scarp is 69-70 degrees to the west, strike is northerly. This exposure is near the mouth of Birch Creek, T. 12 S., R. 1 E. Juab County, Utah. 1982. #1:/Witkind I.J. Collection/wijc0129 ID. Witkind, I.J. 129cp Crumpled beds of the Arapien Shale exposed along Utah Highway 132 in Salt Creek about midway between Nephi and the KOA campground. Exposure occupies the W. 1/2 sec. 1, T. 13 S., R. 1 E. Juab County, Utah. 1982. #1:/Witkind I.J. Collection/wijc0166 ID. Witkind, I.J. 166cp Slickensides along the Wasatch fault scarp exposed near Nephi. Hammer for scale. Juan County, Utah. Spring 1983. #1:/Witkind I.J. Collection/wijc0168 ID. Witkind, I.J. 168cp Slickensides along the Wasatch fault scarp exposed near Nephi. Hammer for scale. Juan County, Utah. Spring 1983. #1:/Thistle, Utah, Landslide/wijc0177 ID. Witkind, I.J. 177cp Thistle, Utah, landslide April 1983. Toe of slide gradually being thickened to form earth filled dam. Area to the left of the toe of the slide is a buttress formed by the Nugget Sandstone and the Twin Creek Limestone. Note beginning of the railroad tunnel at lower left center. Just to the right of the railroad tunnel, near the top of the dam, is part of a spillway tunnel designed to prevent the lake from rising above the level of the dam. This spillway tunnel, which appears as a small black spot, is 12 feet in diameter. Spring 1983. #1:/Thistle, Utah, Landslide/wijc0180 ID. Witkind, I.J. 180cp Thistle, Utah, landslide April 1983. Thistle Lake occupying part of Soldier Creek. The small valley extending toward the distant mountains is Lake Fork. Note roofs of homes and tree tops exposed above the lake surface. View is southeast. 1983. #1:/Thistle, Utah, Landslide/wijc0181 ID. Witkind, I.J. 181cp Thistle, Utah, landslide April 1983. Thistle Lake occupying part of Soldier Creek. The small body of water just visible beyond the ridge along the right is in Thistle Creek. View is south. 1983. #1:/Thistle, Utah, Landslide/wijc0342 ID. Witkind, I.J. 342cp Thistle, Utah, landslide April 1983. Slickensides and grooves along the southeast flank of the landslide. #1:/Thistle, Utah, Landslide/wijc0351 ID. Witkind, I.J. 351cp Thistle, Utah, landslide April 1983. New railroad tunnel and water overflow tunnel are completed on the lower left. June 16, 1983. #1:/Thistle, Utah, Landslide/wijc0355 ID. Witkind, I.J. 355cp Thistle, Utah, landslide April 1983. Lake Thistle was created by the landslide. New railroad tracks have been laid on the left. View is southeast looking into Lake Fork. June 16, 1983. #1:/Thistle, Utah, Landslide/wijc0363 ID. Witkind, I.J. 363cp Thistle, Utah, landslide April 1983. Fold in Arapien Shale east of the Navajo Sandstone-Twin Creek Limestone ridge. 1983. #1:/Thistle, Utah, Landslide/wijc0443 ID. Witkind, I.J. 443cp Thistle, Utah, landslide April 1983. Flood sediment covering the railroad tracks near Thistle Creek in Thistle near Jackson farm. 1983. #1:/Thistle, Utah, Landslide/wijc0444 ID. Witkind, I.J. 444cp Thistle, Utah, landslide April 1983. Damaged and sagging railroad bridge at Thistle Creek. 1983. #1:/Witkind I.J. Collection/wijc0450 ID. Witkind, I.J. 450cp Mudslide, from toe toward point of origin, near Bear Canyon Picnic area, Mount Nebo area. Nebo Basin quadrangle. Sec. 8, T.12 S., R.2 E. Juab County, Utah. 1983. #1:/Witkind I.J. Collection/wijc0451 ID. Witkind, I.J. 451cp Mudslide near Bear Canyon Picnic area, Mount Nebo area. Nebo Basin quadrangle. Sec. 8, T.12 S., R.2 E. Juab County, Utah. 1983. #1:/Witkind I.J. Collection/wijc0471 ID. Witkind, I.J. 471cp Oncolitic limestone and conglomerate in the North Horn Formation. Hammer for scale. Sec. 17, T. 11 S., R. 2 E. Nebo Basin quadrangle. Utah County, Utah. 1983. #1:/Mount Rainier National Park/wil00002 ID. Willis, B. 2 Forest of Douglas fir, growing on gravelly drift about 2,000 feet above sea; on headwaters of Voights Creek, near the crossing of the Willis Trail. Mount Rainier National Park. Pierce County, Washington. July 1896. #1:/Mount Rainier National Park/wil00003 ID. Willis, B. 3 Crater Lake, a rock basin lake due to glacial excavation and tributary to the Puyallup River on the northwest spur below Spray Peak; elevation 5,200 feet. Mount Rainier National Park. Pierce County, Washington. July 1896. #1:/Mount Rainier National Park/wil00004 ID. Willis, B. 4 Mount Rainier; the Liberty Cap and Willis Glacier from the trail near Eagle Cliff; looking southeast. Mount Rainier National Park. Pierce County, Washington. July 1896. Published as plate 68 in U.S. Geological Survey. Annual Report, no. 18, part 2, 1896-1897. 1898. #1:/Mount Rainier National Park/wil00007 ID. Willis, B. 7 Mount Rainier, view from Eagle Cliff on the northwest spur, below Spray Park. The Liberty Cap, the northwestern cliffs and Willis Glacier. Mount Rainier National Park. Pierce County, Washington. July 1896. #1:/Mount Rainier National Park/wil00008 ID. Willis, B. 8 Mount Rainier, north Puyallup Glacier from Eagle Cliff. Mount Rainier National Park. Pierce County, Washington. July 1896. #1:/Mount Rainier National Park/wil00009 ID. Willis, B. 9 The Liberty Cap and the head of Willis Glacier. The northwestern spur at the head of Willis Glacier, 10,500 feet. Mount Rainier National Park. Pierce County, Washington. July 1896. #1:/Mount Rainier National Park/wil00010 ID. Willis, B. 10 Carbon River Glacier. A nunatak near the break of the glacier into the canyon. Mount Rainier National Park. Pierce County, Washington. July 1896. #1:/Mount Rainier National Park/wil00011 ID. Willis, B. 11 Recently abandoned moraine on west side of Carbon Glacier, just below andesite cliff. Mount Rainier National Park. Pierce County, Washington. July 1896. #1:/Mount Rainier National Park/wil00013 ID. Willis, B. 13 Carbon River Glacier. General view of the glacier and great northern amphitheater from the lateral moraine. Mount Rainier National Park. Pierce County, Washington. July 1896. #1:/Mount Rainier National Park/wil00015 ID. Willis, B. 15 Carbon River Glacier. Grassy slope and ice cascade below the great northern amphitheater. Mount Rainier National Park. Pierce County, Washington. July 1896. #1:/Mount Rainier National Park/wil00017 ID. Willis, B. 17 Carbon River Glacier. Ice domes and cascades in the great northern amphitheater from the marginal moraine on the northeast. Mount Rainier National Park. Pierce County, Washington. July 1896. #1:/Willis B. Collection/wil00116 ID. Willis, B. 116 Piedras Blancas, a Miocene outcrop. Sea stack. San Simeon. San Luis Obispo County, California. 1898. #1:/Willis B. Collection/wil00233 ID. Willis, B. 233 Delta of Chelan River entering the Columbia River, Chelan Ferry. Chelan County, Washington. September 18, 1900. #1:/Glacier National Park/wil00244 ID. Willis, B. 244 Glacier National Park, Montana. Chief Mountain, viewed from Saint Mary Valley. June 28, 1901. #1:/Glacier National Park/wil00246 ID. Willis, B. 246 Glacier National Park, Montana. Yellow Mountain showing upturned limestones, viewed from the ridge between Sherburne Lakes and the south fork of Kennedy Creek. June 29, 1901. #1:/Glacier National Park/wil00247 ID. Willis, B. 247 Glacier National Park, Montana. Across Swiftcurrent Valley to Flattop. Moraine ridge of Saint Mary Glacier against the sky. June 29, 1901. #1:/Glacier National Park/wil00252 ID. Willis, B. 252 Glacier National Park, Montana. Across Swiftcurrent Valley, viewed from within an amphitheatre. Grinnell Point(?) on the left. July 3, 1901. #1:/Glacier National Park/wil00253 ID. Willis, B. 253 Glacier National Park, Montana. Allen Mountain to Apikuni Mountain. Grinnell Mountain in the center. July 5, 1901. #1:/Glacier National Park/wil00255 ID. Willis, B. 255 Glacier National Park, Montana. Part of Allen Mountain, Grinnell Glacier, Grinnell Mountain, and part of Altyn Peak, viewed from near Altyn (head of Lake Sherburne). July 5, 1901. #1:/Glacier National Park/wil00258 ID. Willis, B. 258 Glacier National Park, Montana. Toward Swiftcurrent Pass. Mount Grinnell, Swiftcurrent Glacier, and Mount Wilbur. July 5, 1901. #1:/Glacier National Park/wil00259 ID. Willis, B. 259 Glacier National Park, Montana. McDermott (Swiftcurrent) Lake and Lake Josephine in the foreground. Mount Gould, Mount Pollock, and Mount Allen. July 5, 1901. #1:/Glacier National Park/wil00260 ID. Willis, B. 260 Glacier National Park, Montana. Altyn Limestone in the lower slopes of Appekunny Mountain, northeast of Many Glacier Hotel. This view is at the type locality of the formation, close to the site of the former settlement of Altyn. The Lewis overthrust is at the base of the cliffs, and the smooth slopes below are underlain by shale of Cretaceous age, which yields few outcrops. July 6,1901. Figure 2, U.S. Geological Survey Professional Paper 296. #1:/Glacier National Park/wil00261 ID. Willis, B. 261 Glacier National Park, Montana. Lake Josephine and cliffs of Mount Gould. July 7, 1901. #1:/Glacier National Park/wil00262 ID. Willis, B. 262 Glacier National Park, Montana. Grinnell Glacier and amphitheatre in Cataract Valley. July 7, 1901. #1:/Glacier National Park/wil00263 ID. Willis, B. 263 Glacier National Park, Montana. Mount Gould at the head of Cataract Creek. July 7, 1901. #1:/Glacier National Park/wil00266 ID. Willis, B. 266 Glacier National Park, Montana. Down Swiftcurrent valley beyond bluffs of Siyeh Argillite on one hand and cliffs of Mount Grinnell on the other. July 9, 1901. #1:/Glacier National Park/wil00274 ID. Willis, B. 274 Glacier National Park, Montana. Valley of Kennedy Creek, glacial stream terrace, landslide slope, and Algonkian peak of Yellow Mountain. July 16, 1901. #1:/Glacier National Park/wil00275 ID. Willis, B. 275 Glacier National Park, Montana. Kennedy Creek, Chief Mountain, and Yellow Mountain. July 17, 1901. #1:/Glacier National Park/wil00278 ID. Willis, B. 278 Glacier National Park, Montana. Chief Mountain, viewed from the north fork of Kennedy Creek. July 17, 1901. #1:/Glacier National Park/wil00279 ID. Willis, B. 279 Glacier National Park, Montana. Chief Mountain, viewed from the north fork of Kennedy Creek (Otatso Creek). July 17, 1901. #1:/Glacier National Park/wil00281 ID. Willis, B. 281 Glacier National Park, Montana. Chief Mountain and satellites, Ninaki and Papoose. Algonkian remnants resting on Cretaceous sandstone. July 17, 1901. #1:/Glacier National Park/wil00291 ID. Willis, B. 291 Glacier National Park, Montana. Belly River valley, viewed from about 4 miles south of the 49th parallel. July 19, 1901. #1:/Glacier National Park/wil00292 ID. Willis, B. 292 Glacier National Park, Montana. Belly River and Cosley Ridge on the left, viewed from 1 mile below its main fork. July 20, 1901. #1:/Glacier National Park/wil00293 ID. Willis, B. 293 Glacier National Park, Montana. Belly River and Cosley Ridge (center) and Shepard Glacier (right background), viewed from 1.5 miles below its main fork. July 20, 1901. #1:/Glacier National Park/wil00294 ID. Willis, B. 294 Glacier National Park, Montana. Up Mokowanis River from the shore of Cosley Lake to Pyramid Peak, Shepard Glacier, and Cathedral Peak. July 22, 1901. #1:/Glacier National Park/wil00295 ID. Willis, B. 295 Glacier National Park, Montana. Pyramid Peak and Shepard Glacier reflected in Glenns Lake. July 22, 1901. #1:/Glacier National Park/wil00297 ID. Willis, B. 297 Glacier National Park, Montana. Mount Cleveland and the great amphitheatre beyond the valley of Belly River, viewed from 1 mile below the main forks. July 23, 1901. #1:/Glacier National Park/wil00305 ID. Willis, B. 305 Glacier National Park, Montana. Mount Cleveland and Waterton Lake about 2 miles south of the boundary, viewed from the west shore. July 29, 1901. #1:/Glacier National Park/wil00310 ID. Willis, B. 310 Glacier National Park, Montana. Great cirque wall on the north side of Goat Haunt Mountain. Part shown is 1,200 feet high. July 30, 1901. Plate 8, U.S. Geological Survey Bulletin 600. #1:/Glacier National Park/wil00311 ID. Willis, B. 311 Glacier National Park, Montana. Kootenai Peak about 7 miles above Waterton Lake. Mountain crags of Siyeh Limestone. August 1, 1901. #1:/Glacier National Park/wil00314 ID. Willis, B. 314 Glacier National Park, Montana. Waterton Valley, viewed from Kootenai Peak. Mount Cleveland on the right. Waterton Lake in the background. August 3, 1901. #1:/Glacier National Park/wil00315 ID. Willis, B. 315 Glacier National Park, Montana. Waterton Valley, viewed from Kootenai Peak. Mount Cleveland on the right. Waterton Lake in the background. August 3, 1901. #1:/Glacier National Park/wil00325 ID. Willis, B. 325 Glacier National Park, Montana. Rock mass at the head of McDonald Creek, showing large concretionary or coralline masses in the Siyeh Formation about 500 feet from the top of the formation. August 7, 1901. #1:/Glacier National Park/wil00332 ID. Willis, B. 332 Glacier National Park, Montana. Glaciated cliffs, Grinnell red beds up to lower shoulder. Siyeh Formation above with sheet (exfoliating?) making highest shoulder on the right. Heavens Peak in the distance. Avalanche Lake in the foreground. August 10, 1901. #1:/Glacier National Park/wil00333 ID. Willis, B. 333 Glacier National Park, Montana. Avalanche Lake. Dense forest coming down to the water's edge. Heavens Peak in the background at the right and Mount Vaught on the left. August 10, 1901. Plate 6-B, U.S. Geological Survey Bulletin 600. #1:/Glacier National Park/wil00335 ID. Willis, B. 335 Glacier National Park, Montana. Northeast toward McDonald Creek valley with Lake McDonald in the foreground, a quarter of a mile north of the hotel. August 13, 1901. #1:/Glacier National Park/wil00336 ID. Willis, B. 336 Glacier National Park, Montana. Northern end of the eastern shore of Lake McDonald, a quarter of a mile above hotel point. August 13, 1901. #1:/Glacier National Park/wil00337 ID. Willis, B. 337 Glacier National Park, Montana. Toward Mount Stanton(?), birch tree and beach on the northwest corner of Lake McDonald. August 13, 1901. #1:/Willis B. Collection-Glacier National Park and Preserve/wil00338 ID. Willis, B. 338 Geological Survey pack train on beach at head of Lake McDonald. Glacier National Park. Flathead County, Montana. 1901. #1:/Glacier National Park/wil00346 ID. Willis, B. 346 Glacier National Park, Montana. Mountains and amphitheatre in which upper Kintla Lake lies, viewed from Lower Kintla Lake on the north bank 1 mile from the east end. August 24, 1901. #1:/Glacier National Park/wil00347 ID. Willis, B. 347 Glacier National Park, Montana. Kintla Peak, viewed from the north bank of Lower Kintla Lake about 1 mile from the east end. August 1901. #1:/Glacier National Park/wil00349 ID. Willis, B. 349 Glacier National Park, Montana. Mountains across which the international boundary was not located. The boundary is in middle. Camera set over the monument and pointed due west. August 29, 1901. #1:/Glacier National Park/wil00350 ID. Willis, B. 350 Glacier National Park, Montana. Monument marking the point where the international boundary crosses the Continental Divide, west of Waterton Lake. Looking southeast across the line into the United States. Monument set in 1861. August 29, 1901. Plate 1-B, U.S. Geological Survey Bulletin 600. #1:/Glacier National Park/wil00351 ID. Willis, B. 351 Glacier National Park, Montana. Upper Kintla Lake toward Gardner Point. August 30, 1901. #1:/Glacier National Park/wil00352 ID. Willis, B. 352 Glacier National Park, Montana. Kintla Peak rising from Upper Kintla Lake. August 30, 1901. #1:/Willis B. Collection/wil00400 ID. Willis, B. 400 General view of Norman and characteristic plains from the attic window of the University of Oklahoma. Norman, Oklahoma Territory. ca 1900. #1:/Willis B. Collection/wil00401 ID. Willis, B. 401 Grassy foreground is a characteristic piece of the prairie which has never been broken up or seeded, but has been in use as an athletic field for several years. Campus of the University of Oklahoma. Norman, Oklahoma Territory. ca 1900. #1:/Glacier National Park/wil0330a ID. Willis, B. 330a Glacier National Park, Montana. Mount Kipp and park head of Kootenai Creek. August 9, 1901. #1:/Paricutin Volcano, Mexico/wire0113 ID. Wilcox, R.E. 113ct Paricutin Volcano, Mexico, eruption, viewed from Tipacua. Note the lava-dammed lake in the foreground. October 30, 1947. #1:/Paricutin Volcano, Mexico/wire0116 ID. Wilcox, R.E. 116ct Paricutin Volcano, Mexico, eruption, viewed from the west. Note the heavy ash cover on year-old lava. November 7, 1947. #1:/Paricutin Volcano, Mexico/wire0373 ID. Wilcox, R.E. 373ct Paricutin Volcano, Mexico, in eruption at night. Lava is bursting far above the crater rim and is also visible on the flanks. #1:/Paricutin Volcano, Mexico/wire0378 ID. Wilcox, R.E. 378ct Paricutin Volcano, Mexico, in eruption at night. 1947. #1:/Cerro Negro Volcano, Nicaragua/wire0414 ID. Wilcox, R.E. 414ct Cerro Negro Volcano, Nicaragua, in eruption. July 24, 1947. #1:/Alaska/wire0552 ID. Wilcox, R.E. 552ct Alaska. Head of Etienne Bay on Attu Island, viewed from the north side. August 27, 1950. #1:/Alaska/wire0557 ID. Wilcox, R.E. 557ct Alaska. Ice wedge structures (till/bedrock) on the north end of the airstrip at Massacre Bay on Attu Island. Photo by J.P. Schafer, August 30, 1950. #1:/Alaska/wire0568 ID. Wilcox, R.E. 568ct Alaska. Eroded cliff, sea stack, and tilted bedding in the Aleutian Islands. July 1950. #1:/Alaska/wire0576 ID. Wilcox, R.E. 576ct Alaska. Sea Cliffs over 100 feet high, with columnar tuff, at Otkriti Bay on Agattu Island. Photo by J.P. Schafer, August 9, 1950. #1:/Woodworth J.B. Col]lection/wjb00138 ID. Woodworth, J.B. 138 Sand Point, Prudence Island lighthouse. View from knoll of slate looking northeast at spit on which lighthouse stands. Newport County, Rhode Island. 1895. #1:/Cape Cod National Seashore/wjb00208 ID. Woodworth, J.B. 208 Cape Cod National Seashore, Massachusetts. East side of Long Wharf, Provincetown waterfront. August 1916. #1:/Cape Cod National Seashore/wjb00209 ID. Woodworth, J.B. 209 Cape Cod National Seashore, Massachusetts. The "clay pounds" at Highland Light in front of the wireless station, looking south 5 degrees east. Jameco Gravels at the base, Gardiners Clay in the middle, and Jacobs Sands at the top of the section. June 3, 1916. #1:/Cape Cod National Seashore/wjb00211 ID. Woodworth, J.B. 211 Cape Cod National Seashore, Massachusetts. Pamet Hollow at Truro, viewed from the hill on the south end of the village, looking north. June 7, 1916. #1:/Cape Cod National Seashore/wjb00212 ID. Woodworth, J.B. 212 Cape Cod National Seashore, Massachusetts. Kame-like hills in the western part of the Truro Plains, looking south-southwest across the marshes from the Truro railroad station. June 8, 1916. #1:/Cape Cod National Seashore/wjb00213 ID. Woodworth, J.B. 213 Cape Cod National Seashore, Massachusetts. Wellfleet High Plains, half a mile southwest of Highland Light, looking south 25 degrees west. June 3, 1916. #1:/Cape Cod National Seashore/wjb00214 ID. Woodworth, J.B. 214 Cape Cod National Seashore, Massachusetts. Old wooded dune or "island" in the beach on the ocean side of Pilgrim Heights, viewed from the marsh above the dike, looking north 80 degrees east. June 5, 1916. #1:/Cape Cod National Seashore/wjb00215 ID. Woodworth, J.B. 215 Cape Cod National Seashore, Massachusetts. Old sea cliff on the west side of Pilgrim Heights, looking north 22 degrees west from the railroad track in the marsh. June 5, 1916. #1:/Cape Cod National Seashore/wjb00216 ID. Woodworth, J.B. 216 Cape Cod National Seashore, Massachusetts. Ocean shore about 2 miles south of Highland Light, looking north 35 degrees west, from coast guard trail. June 5, 1916. #1:/Cape Cod National Seashore/wjb00219 ID. Woodworth, J.B. 219 Cape Cod National Seashore, Massachusetts. North Truro 70 feet plain, looking north 52 degrees west from the signal station at Highland Light. June 3, 1916. #1:/Woodworth J.B. Col]lection/wjb00231 ID. Woodworth, J.B. 231 Vegetation growing in crack on the "Governor", granite boulder on crest of Naushon Island. Elizabeth Islands, Massachusetts. August 1916. #1:/Alaska Glaciers/wjr00517 ID. Williams, J.R. 517 Alaska Glaciers. Nelchina Glacier and valley, viewed from the 4,800-foot level on a mountain 5 miles north of the glacier on the west side of the valley. Nelchina Glacier is northwest of Valdez in the Chugach Mountains. June 21, 1952. Photos wjr00517 and wjr00518 form a panorama. #1:/Alaska Glaciers/wjr00518 ID. Williams, J.R. 518 Alaska Glaciers. Nelchina Glacier and valley, viewed from the 4,800-foot level on a mountain 5 miles north of the glacier on the west side of the valley. Nelchina Glacier is northwest of Valdez in the Chugach Mountains. June 21, 1952. Photos wjr00517 and wjr00518 form a panorama. #1:/Alaska Glaciers/wjr00586 ID. Williams, J.R. 586 Alaska Glaciers. Terminus of Tazlina Glacier, viewed from a point where the outwash stream cuts bedrock about a quarter of a mile north of the eastern end of the terminal moraine on the lower slopes of hill 5200 (feet?). Tazlina Glacier is north of Valdez in the Chugach Mountains. July 15, 1952. Photos wjr00586, wjr00587, and wjr00588 form a panorama. #1:/Alaska Glaciers/wjr00587 ID. Williams, J.R. 587 Alaska Glaciers. Terminus of Tazlina Glacier, viewed from a point where the outwash stream cuts bedrock about a quarter of a mile north of the eastern end of the terminal moraine on the lower slopes of hill 5200 (feet?). Tazlina Glacier is north of Valdez in the Chugach Mountains. July 15, 1952. Photos wjr00586, wjr00587, and wjr00588 form a panorama. #1:/Alaska Glaciers/wjr00588 ID. Williams, J.R. 588 Alaska Glaciers. Terminus of Tazlina Glacier, viewed from a point where the outwash stream cuts bedrock about a quarter of a mile north of the eastern end of the terminal moraine on the lower slopes of hill 5200 (feet?). Tazlina Glacier is north of Valdez in the Chugach Mountains. July 15, 1952. Photos wjr00586, wjr00587, and wjr00588 form a panorama. #1:/Alaska Glaciers/wjr00744 ID. Williams, J.R. 744 Alaska Glaciers. Worthington Glacier near Ptarmigan Drop on the north side of Thompson Pass on Richardson Highway near Valdez in the Chugach Mountains. October 2, 1952. #1:/Alaska Glaciers/wjr00745 ID. Williams, J.R. 745 Alaska Glaciers. Worthington Glacier north of Thompson Pass on Richardson Highway near Valdez in the Chugach Mountains. October 2, 1952. #1:/Alaska Glaciers/wjr01131 ID. Williams, J.R. 1131 Alaska Glaciers. South end of Tazlina Lake and Tazlina Glacier, which is north of Valdez in the Chugach Mountains. June 13, 1954. #1:/Alaska Glaciers/wjr01237 ID. Williams, J.R. 1237 Alaska Glaciers. From south 30 degrees west, westward to slightly north of west of the lower terminal portion of Matanuska Glacier from the southern part of the summit of Glacier Point or Lion Head. Matanuska Glacier is northeast of Palmer in the Chugach Mountains. August 9, 1954. Photos wjr01237, wjr01238, wjr01239, wjr01240, and wjr01241 form a panorama. #1:/Alaska Glaciers/wjr01238 ID. Williams, J.R. 1238 Alaska Glaciers. From south 30 degrees west, westward to slightly north of west of the lower terminal portion of Matanuska Glacier from the southern part of the summit of Glacier Point or Lion Head. Matanuska Glacier is northeast of Palmer in the Chugach Mountains. August 9, 1954. Photos wjr01237, wjr01238, wjr01239, wjr01240, and wjr01241 form a panorama. #1:/Alaska Glaciers/wjr01239 ID. Williams, J.R. 1239 Alaska Glaciers. From south 30 degrees west, westward to slightly north of west of the lower terminal portion of Matanuska Glacier from the southern part of the summit of Glacier Point or Lion Head. Matanuska Glacier is northeast of Palmer in the Chugach Mountains. August 9, 1954. Photos wjr01237, wjr01238, wjr01239, wjr01240, and wjr01241 form a panorama. #1:/Alaska Glaciers/wjr01240 ID. Williams, J.R. 1240 Alaska Glaciers. From south 30 degrees west, westward to slightly north of west of the lower terminal portion of Matanuska Glacier from the southern part of the summit of Glacier Point or Lion Head. Matanuska Glacier is northeast of Palmer in the Chugach Mountains. August 9, 1954. Photos wjr01237, wjr01238, wjr01239, wjr01240, and wjr01241 form a panorama. #1:/Alaska Glaciers/wjr01241 ID. Williams, J.R. 1241 Alaska Glaciers. From south 30 degrees west, westward to slightly north of west of the lower terminal portion of Matanuska Glacier from the southern part of the summit of Glacier Point or Lion Head. Matanuska Glacier is northeast of Palmer in the Chugach Mountains. August 9, 1954. Photos wjr01237, wjr01238, wjr01239, wjr01240, and wjr01241 form a panorama. #1:/Alaska Glaciers/wjr01271 ID. Williams, J.R. 1271 Alaska Glaciers. Terminus of Matanuska Glacier, which is northeast of Palmer in the Chugach Mountains. August 22, 1954. Photos wjr01271, wjr01272, wjr01273, wjr01274, wjr01275, and wjr01276 form a panorama. #1:/Alaska Glaciers/wjr01272 ID. Williams, J.R. 1272 Alaska Glaciers. Terminus of Matanuska Glacier, which is northeast of Palmer in the Chugach Mountains. August 22, 1954. Photos wjr01271, wjr01272, wjr01273, wjr01274, wjr01275, and wjr01276 form a panorama. #1:/Alaska Glaciers/wjr01273 ID. Williams, J.R. 1273 Alaska Glaciers. Terminus of Matanuska Glacier, which is northeast of Palmer in the Chugach Mountains. August 22, 1954. Photos wjr01271, wjr01272, wjr01273, wjr01274, wjr01275, and wjr01276 form a panorama. #1:/Alaska Glaciers/wjr01274 ID. Williams, J.R. 1274 Alaska Glaciers. Terminus of Matanuska Glacier, which is northeast of Palmer in the Chugach Mountains. August 22, 1954. Photos wjr01271, wjr01272, wjr01273, wjr01274, wjr01275, and wjr01276 form a panorama. #1:/Alaska Glaciers/wjr01275 ID. Williams, J.R. 1275 Alaska Glaciers. Terminus of Matanuska Glacier, which is northeast of Palmer in the Chugach Mountains. August 22, 1954. Photos wjr01271, wjr01272, wjr01273, wjr01274, wjr01275, and wjr01276 form a panorama. #1:/Alaska Glaciers/wjr01276 ID. Williams, J.R. 1276 Alaska Glaciers. Terminus of Matanuska Glacier, which is northeast of Palmer in the Chugach Mountains. August 22, 1954. Photos wjr01271, wjr01272, wjr01273, wjr01274, wjr01275, and wjr01276 form a panorama. #1:/Alaska/wjr01311 ID. Williams, J.R. 1311 Alaska. Gravel spit formed by longshore currents induced by wind waves on the north slope of Tazlina Lake between Mendeltna Creek and its outlet. June 1957. #1:/San Andreas Fault/wre00014 ID. Wallace, R.E. 14ct San Andreas Fault, Carrizo Plain, California. Northeast across the San Andreas Fault showing several offset stream channels. The main channel in the middle is offset about 130 meters. The channel on the left or near side of the fault is offset 380 meters from the upstream segment and is beheaded. Figure 14, U.S. Geological Survey Open-File Report 83-98. #1:/Wallace R.M. Collection/wrm00020 ID. Wallace, R.M. 20 Steep reverse fault in dolomitic marble at the Jazida do Urubu. Drag folds near the foot of the face are well defined along the fault plane but less distinct above. Small crenulations conforming to the regional fold pattern appear in a dark layer in the face about 0.3 meter above the man's head. Minas Gerais, Brazil. 1957. Figure 21 in U.S. Geological Survey. Professional paper 341-F. 1965. #1:/San Andreas Fault/wre00022 ID. Wallace, R.E. 22ct San Andreas Fault, Carrizo Plain, California. Lineament and scarplet along the San Andreas Fault showing the uplifted block on the right giving way to the uplifted block on the left in the distance. View is northwest. Figure 22, U.S. Geological Survey Open-File Report 83-98. #1:/San Andreas Fault/wre00032 ID. Wallace, R.E. 32ct San Andreas Fault, Carrizo Plain. Valley deeply eroded along the San Andreas Fault. The downstream segment of the channel on the west side (far side) of the fault has been displaced a kilometer or more from the upstream segment (left out of view). View is southwest. Figure 32, U.S. Geological Survey Open-File Report 83-98. #1:/San Andreas Fault/wre00040 ID. Wallace, R.E. 40ct San Andreas Fault, Carrizo Plain, California. Southeast along the San Andreas Fault. In the foreground, the block on the west side of the fault (right) has been raised relative to the block on the east side damming drainage from the hills to the east. Figure 40, U.S. Geological Survey Open-File Report 83-98. #1:/Coalinga, California, Earthquake May 2, 1983/wre00042 ID. Wallace, R.E. 42ct Coalinga, California, Earthquake May 2, 1983. Severe damage to the Pacific Gas and Electric Company Coalinga substation. May 1983. See also photos hmg00030 and hmg00031. #1:/Coalinga, California, Earthquake May 2, 1983/wre00045 ID. Wallace, R.E. 45ct Coalinga, California, Earthquake May 2, 1983. Failure of the exterior wall of the El Olivo Mexican Resturant. May 1983. #1:/Coalinga, California, Earthquake May 2, 1983/wre00046 ID. Wallace, R.E. 46ct Coalinga, California, Earthquake May 2, 1983. Failed second-story exterior wall of an office building. May 1983. #1:/Coalinga, California, Earthquake May 2, 1983/wre00047 ID. Wallace, R.E. 47ct Coalinga, California, Earthquake May 2, 1983. Failed exterior wall of an office building. May 1983. #1:/Coalinga, California, Earthquake May 2, 1983/wre00048 ID. Wallace, R.E. 48ct Coalinga, California, Earthquake May 2, 1983. Apparent failure of the front wall of an office building after removal of debris. May 1983. #1:/Coalinga, California, Earthquake May 2, 1983/wre00049 ID. Wallace, R.E. 49ct Coalinga, California, Earthquake May 2, 1983. Failed exterior wall of an office building. May 1983. #1:/Coalinga, California, Earthquake May 2, 1983/wre00050 ID. Wallace, R.E. 50ct Coalinga, California, Earthquake May 2, 1983. Complete destruction of a two- story building. May 1983. #1:/Coalinga, California, Earthquake May 2, 1983/wre00051 ID. Wallace, R.E. 51ct Coalinga, California, Earthquake May 2, 1983. Major collapse of house roof and chimney. May 1983. This house is possibly the same as shown in hmg00045. #1:/Coalinga, California, Earthquake May 2, 1983/wre00052 ID. Wallace, R.E. 52ct Coalinga, California, Earthquake May 2, 1983. House displaced from its foundation. The door is below the level of the porch and offset from the steps. The house was in the restricted area of heavily damaged downtown Coalinga. May 1983. See also photos hmg00022 and hmg00023. #1:/Coalinga, California, Earthquake May 2, 1983/wre00053 ID. Wallace, R.E. 53ct Coalinga, California, Earthquake May 2, 1983. Displaced wood-frame house, as shown by bent decorative ironwork on the porch and raised concrete porch steps. May 1983. #1:/Coalinga, California, Earthquake May 2, 1983/wre00055 ID. Wallace, R.E. 55ct Coalinga, California, Earthquake May 2, 1983. Displaced wood-frame house, as shown by shifted porch pillars. May 1983. #1:/Coalinga, California, Earthquake May 2, 1983/wre00057 ID. Wallace, R.E. 57ct Coalinga, California, Earthquake May 2, 1983. Wood-frame house displaced from its Foundation, as shown by tilted porch and roof. May 1983. #1:/Coalinga, California, Earthquake May 2, 1983/wre00059 ID. Wallace, R.E. 59ct Coalinga, California, Earthquake May 2, 1983. Collapsed brick chimney and toppled "swamp cooler" air conditioner within the restricted area of heavily damaged downtown Coalinga. May 1983. #1:/Coalinga, California, Earthquake May 2, 1983/wre00060 ID. Wallace, R.E. 60ct Coalinga, California, Earthquake May 2, 1983. Residents camped in their own front yard for temporary housing. The house was in the restricted area of heavily damaged downtown Coalinga. May 1983. #1:/San Andreas Fault/wre00193 ID. Wallace, R.E. 193 San Andreas Fault, Carrizo Plain, California. Stream offset a quarter of a mile. 1965. #1:/Wallace R.E. Collection/wre00198 ID. Wallace, R.E. 198 Oblique aerial view of eastern Mojave Desert. San Bernardino County, California. 1965. #1:/Hawaii Volcanoes National Park/wre00521 ID. Wilcox, R.E. 521ct Hawaii Volcanoes National Park. Geologist at sulfur banks on Kilauea Volcano. 1950. #1:/Hawaii Volcanoes National Park/wire0527 ID. Wilcox, R.E. 527ct Hawaii Volcanoes National Park. Hawaii Volcanoes Observatory headquarters building. 1951. #1:/Hawaii Volcanoes National Park/wre00529 ID. Wilcox, R.E. 529ct Hawaii Volcanoes National Park. Magnetometer setup. Gordon Macdonald, H.R. Joesting, and Ruy Finch inspecting the arrangement. 1951. #1:/Hawaii Volcanoes National Park/wre00535 ID. Wilcox, R.E. 535ct Hawaii Volcanoes National Park. Testing magnetometer setup. 1951. #1:/Wood R.H. Collection/wrh00044 ID. Wood, R.H. 44 Osage Wigwam in yard of an Indian at Grayhorse. Smoke issuing from open top does not show in picture. January 1914. Osage Indian Reservation, Oklahoma. #1:/Woolley R.R. Collection-Cove Creek Sulphur Mine/wrr00369 ID. Woolley, R.R. 369 Cove Creek sulphur mine, 20 miles north of Beaver, Utah. July 8, 1941. #1:/Coastal Regions/wsj00011 ID. Williams, S.J. 11ct Coastal Regions. Storm overwash and other processes have deposited sand in complex patterns along this South Carolina barrier spit. Page 11 (top photo), U.S. Geological Survey Circular 1075. #1:/Coastal Regions/wsj00014 ID. Williams, S.J. 14ct Coastal Regions. The heavily engineered Chicago shoreline is vulnerable to damage from Lake Michigan. Page 13 (top photo), U.S. Geological Survey Circular 1075. #1:/Coastal Regions/wsj00018 ID. Williams, S.J. 18ct Coastal Regions. A groin has trapped sand on the updrift side, but the downdrift beach is starved of sand at Manasquan, New Jersey. 1990. Page 16 (top photo), U.S. Geological Survey Circular 1075. #1:/Coastal Regions/wsj00019 ID. Williams, S.J. 19ct Coastal Regions. A series of groins interrupts the natural transport of sand by longshore currents at Norfolk, Virginia. Page 16 (bottom photo), U.S. Geological Survey Circular 1075. #1:/Wetlands/wsj00020 ID. Williams, S.J. 20ct Fragile wetlands are easily damaged by salt water that invades canals dredged for navigation and oil exploration. Page 17 (top photo), U.S. Geological Survey Circular 1075. #1:/Fenwick Island, Maryland/wsj00022 ID. Williams, S.J. 22ct Fenwick Island, Maryland. Highly developed barrier beach at Ocean City. The dunes that once protected the island have been removed to improve the view, and the tall apartment buildings are so close to the water's edge that the beach is shadowed by mid-afternoon. Many of these buildings were damaged by flooding immediately after their construction. Beach replenishment along Fenwick Island in 1988 and 1990 by Maryland and the U.S. Army Corps of Engineers was designed to provide some temporary protection to the buildings and to increase the recreational value of the beach. 1990. Page 18, U.S. Geological Survey Circular 1075. #1:/Coastal Regions/wsj00026 ID. Williams, S.J. 26ct Coastal Regions. Damage by Hurricane Hugo to South Carolina's Isle of Palms and Sullivan's Island underscores the need for knowledge of beach and storm processes in order to protect lives and property. Page 21 (bottom photo), U.S. Geological Survey Circular 1075. #1:/Hawaii Volcanoes National Park/wtl00001 ID. Wright, T.L. 1 Hawaii Volcanoes National Park. March 1965 eruption of Kilauea Volcano. Post-eruption surface of Makaopuhi lava lake. The vent is to the left, and the diameter of the lake surface is about 365 meters. A drainback rim surrounds the lake. The east wall of the crater is in shadow. Part of the shallower east pit is shown at the far right. The relatively smooth surface, marked by polygonal cracks and flow lines, formed following the last crustal foundering episode on March 19, 1965. The elongate area in the right center and some smaller areas near the vent are lower in altitude than the overturn crust surface and were the locus of the latest ooze-outs on March 20. Darker areas are islands of crust. Those associated with the low area to the right are remnants of a pressure ridge that was formed during the first eruptive phase on March 5. Those at the left are pieces of the vent rafted out on the lake surface. March 1965. Figure 2, U.S. Geological Survey Professional Paper 1004. #1:/Hawaii Volcanoes National Park/wtl00002 ID. Wright, T.L. 2 Hawaii Volcanoes National Park. Tramway used to transport equipment from the rim to the crater floor of Kilauea Volcano in 1965-67. Scale is given by the wooden box which is about 1 meter long. A three-eighths-inch steel cable is fastened at the upper end to an A-frame set in concrete and at the lower end to a chain wrapped around the island. Equipment is lowered in a wooden box attached to a pulley running on the steel cable. A rope attached to the box is reeled on a winch (to the left of the A-frame) which in turn is connected by rope to a pulley attached to the axle of a jeep, jacked up, and blocked in position (not shown). Circa 1965. Figure 5-A, U.S. Geological Survey Professional Paper 1004. #1:/Hawaii Volcanoes National Park/wtl00005 ID. Wright, T.L. 5 Hawaii Volcanoes National Park. Tramway used to transport equipment from the rim to the floor of Kilauea Volcano in 1968-69. In the foreground are the equipment trailer, the litter used to take equipment from the tram to the drill site, the core box (lower left) and a sheathed thermocouple (center). The trail to get in and out of the crater goes up the left side of the talus in the background, and then up the ridge between the east and west pits, to the top. Figure 6-B, U.S. Geological Survey Professional Paper 1004. #1:/Hawaii Volcanoes National Park/wtl00006 ID. Wright, T.L. 6 Hawaii Volcanoes National Park. Portable drilling rig used at Kilauea Volcano in 1965-66. The drill (left) is powered by a connected chain saw motor (in left hand of operator) and is lowered and raised by a hydraulic feed (in the right hand of the operator). Coolant water is pumped (right center) from two fifty-gallon drums. Steam rises from the March 1965 vent area; the main vent is out of the picture toward the right background. The highest level of the lava lake before drainback is recorded by the "bathtub ring" in the background. Circa 1968. Figure 7, U.S. Geological Survey Professional Paper 1004. #1:/Hawaii Volcanoes National Park/wtl00007 ID. Wright, T.L. 7 Hawaii Volcanoes National Park. Trailer-mounted drill rig used at Kilauea Volcano during 1968-69. Water is brought from the rim by hose and stored in a child's swimming pool (foreground) from which it is pumped to cool the drill string. Circa 1968. Figure 8-A, U.S. Geological Survey Professional Paper 1004. #1:/Hawaii Volcanoes National Park/wtl00008 ID. Wright, T.L. 8 Hawaii Volcanoes National Park. Drilling head of the trailer-mounted drill rig used at Kilauea Volcano during 1968-69. The water pump is shown in the right background. The drilling was done using an NX core barrel and bits attached to an AX drill string. Circa 1968. Figure 8-B, U.S. Geological Survey Professional Paper 1004. #1:/Hawaii Volcanoes National Park/wtl00009 ID. Wright, T.L. 9 Hawaii Volcanoes National Park. Leveling on the surface of Alae lava lake on Kilauea Volcano. A Zeiss level is shown on the left; a 12 foot Invar rod on the right. This equipment was also used throughout the study of Makaopuhi lava lake. Circa 1965. Figure 9-A, U.S. Geological Survey Professional Paper 1004. #1:/Hawaii Volcanoes National Park/wtl00010 ID. Wright, T.L. 10 Hawaii Volcanoes National Park. Measurement of oxygen fugacity at Kilauea Volcano. The oxygen probe sheathed in ceramic is attached to a hollow stainless steel rod through which platinum leads are threaded. The leads are connected to an electrometer (lower right) from which the EMF is read. Temperature measurements are made in an analogous fashion using thermocouple wire threaded through ceramic leads and sheathed in stainless steel. The leads are connected through a cold junction (ice-filled thermos jug at lower right) to a millivolt potentiometer (not shown). Circa 1965. Figure 9-A, U.S. Geological Survey Professional Paper 1004. #1:/Hawaii Volcanoes National Park/wtl00011 ID. Wright, T.L. 11 Hawaii Volcanoes National Park. Drill core from hole 68-1 drilled at Makaopuhi lava lake between November 6, 1968, and January 31, 1969. Depth is 0 to 14.4 feet. 1968. Figure 24-A, U.S. Geological Survey Professional Paper 1004. #1:/Hawaii Volcanoes National Park/wtl00012 ID. Wright, T.L. 12 Hawaii Volcanoes National Park. Drill core from hole 68-1 drilled at Makaopuhi lava lake between November 6, 1968, and January 31, 1969. Depth is 14.4 to 28.8 feet. 1968. Figure 24-B, U.S. Geological Survey Professional Paper 1004. #1:/Hawaii Volcanoes National Park/wtl00013 ID. Wright, T.L. 13 Hawaii Volcanoes National Park. Drill core from hole 68-1 drilled at Makaopuhi lava lake between November 6, 1968, and January 31, 1969. Depth is 28.8 to 54.0 feet. 1968. Figure 24-C, U.S. Geological Survey Professional Paper 1004. #1:/Hawaii Volcanoes National Park/wtl00015 ID. Wright, T.L. 15 Hawaii Volcanoes National Park. Drill core from hole 68-2 drilled at Makaopuhi lava lake between November 6, 1968, and January 31, 1969. Depth is 0 to 17.0 feet. 1968. Figure 25-A, U.S. Geological Survey Professional Paper 1004. #1:/Hawaii Volcanoes National Park/wtl00016 ID. Wright, T.L. 16 Hawaii Volcanoes National Park. Drill core from hole 68-2 drilled at Makaopuhi lava lake between November 6, 1968, and January 31, 1969. Depth is 17.0 to 33.0 feet. 1968. Figure 25-B, U.S. Geological Survey Professional Paper 1004. #1:/Hawaii Volcanoes National Park/wtl00017 ID. Wright, T.L. 17 Hawaii Volcanoes National Park. Drill core from hole 68-2 drilled at Makaopuhi lava lake between November 6, 1968, and January 31, 1969. Depth is 33.0 to 52.0 feet. 1968. Figure 25-C, U.S. Geological Survey Professional Paper 1004. #1:/Katmai National Park and Preserve/wtl00030 ID. Wright, T.L. 30ct Katmai National Park and Preserve, Alaska. Lava dome of Novarupta. Photo by G. Iwatsubo. #1:/Zeller Collection/zhd00004 ID. Zeller, H.D. 4 Basal conglomerate of the Arikaree Formation, resting unconformably on the Bridger Formation a Oregon Buttes. Continental Peak is in the background. Photograph by N.M. Denson. Sweetwater County, Wyoming. ca. 1962. Figure 7 in U.S. Geological Survey. Bulletin 1256. 1969. #1:/California-Professional paper 116/prw0260a ID. Pack, R.W. 260a Form a panorama of foothills formed of Tertiary rocks on west side of Salt Creek, looking westward from divide between Tacuya and Salt creeks, about 1 mile from edge of San Joaquin Valley. Sharp ridge at extreme left formed by Tertiary volcanic rocks lying in the Vaqueros formation. Syncline in center occupied by diatomaceous Maricopa shale. Badlands carved in gravels of Vaqueros formation. Kern County, California. September 28, 1912. Plate 5 in U.S. Geological Survey. Professional paper 116. 1920. #1:/California-Professional paper 116/prw0260b ID. Pack, R.W. 260b Form a panorama of foothills formed of Tertiary rocks on west side of Salt Creek, looking westward from divide between Tacuya and Salt creeks, about 1 mile from edge of San Joaquin Valley. Sharp ridge at extreme left formed by Tertiary volcanic rocks lying in the Vaqueros formation. Syncline in center occupied by diatomaceous Maricopa shale. Badlands carved in gravels of Vaqueros formation. Kern County, California. September 28, 1912. Plate 5 in U.S. Geological Survey. Professional paper 116. 1920. #1:/California-Professional paper 116/prw0260c ID. Pack, R.W. 260c Form a panorama of foothills formed of Tertiary rocks on west side of Salt Creek, looking westward from divide between Tacuya and Salt creeks, about 1 mile from edge of San Joaquin Valley. Sharp ridge at extreme left formed by Tertiary volcanic rocks lying in the Vaqueros formation. Syncline in center occupied by diatomaceous Maricopa shale. Badlands carved in gravels of Vaqueros formation. Kern County, California. September 28, 1912. Plate 5 in U.S. Geological Survey. Professional paper 116. 1920. #1:/California-Professional paper 116/prw00284 ID. Pack, R.W. 284 Basal part of Tejon formation on Los Lobos creek in foothills of San Emigdio Mountains; general view. Kern County, California. October 26, 1912. Plate 7-A in U.S. Geological Survey. Professional paper 116. 1920. #1:/California-Professional paper 116/prw00285 ID. Pack, R.W. 285 Basal part of Tejon formation on Los Lobos creek in foothills of San Emigdio Mountains; interstratified arkosic sandstone and coarse boulder bed. Note small fault at base of exposure, Kern County, California. October 26, 1912. Plate 7-B in U.S. Geological Survey. Professional paper 116. 1920. #1:/California-Professional paper 116/prw0289a ID. Pack, R.W. 289a Form a panorama of outer foothills east of San Emigdio creek, the smoothly rounded hills to the right are carved in the upper part of the Vaqueros formation; badlands at the left in Tertiary gravels. Kern County, California. October 31, 1912. Plate 9-A in U.S. Geological Survey. Professional paper 116. 1920. #1:/California-Professional paper 116/prw0289b ID. Pack, R.W. 289b Form a panorama of outer foothills east of San Emigdio creek, the smoothly rounded hills to the right are carved in the upper part of the Vaqueros formation; badlands at the left in Tertiary gravels. Kern County, California. October 31, 1912. Plate 9-A in U.S. Geological Survey. Professional paper 116. 1920. #1:/California-Professional paper 116/prw0298a ID. Pack, R.W. 298a Form a panorama of the foothills on north slope of San Emigdio Mountains, looking northeast across Pleito Creek from divide between Pleito and San Emigdio creeks about 2 miles north of Antimony Peak. The hills in the foreground are carved in the Tejon formation. The sharp ridge on the right in the distance is formed of Tertiary volcanic rocks lying in the Vaqueros formation. Kern County, California. November 6, 1912. Plate 9-B in U.S. Geological Survey. Professional paper 116. 1920. #1:/California-Professional paper 116/prw0298b ID. Pack, R.W. 298b Form a panorama of the foothills on north slope of San Emigdio Mountains, looking northeast across Pleito Creek from divide between Pleito and San Emigdio creeks about 2 miles north of Antimony Peak. The hills in the foreground are carved in the Tejon formation. The sharp ridge on the right in the distance is formed of Tertiary volcanic rocks lying in the Vaqueros formation. Kern County, California. November 6, 1912. Plate 9-B in U.S. Geological Survey. Professional paper 116. 1920. #1:/California-Professional paper 116/prw00294 ID. Pack, R.W. 294 Unconformity between diatomaceous Maricopa shale and clay shale of Etchegoin formation in San Emigdio region; looking west across Muddy creek, the bedding of the diatomaceous shale is indicated by the hard calcareous layers, The bedding of the clay shale is practically parallel with the contact, which is shown by the sharp change in color. Kern County, California. November 3, 1912. Plate 10-B in U.S. Geological Survey. Professional paper 116. 1920. #1:/California-Professional paper 116/prw00280 ID. Pack, R.W. 280 Brea in arroyo near Muddy Creek, in San Emigdio region; note mass of brea occupying center of gulch above figure of man and small patch at right in foreground. The canyon has cut 10 or 12 feet below the level marked by this brea. Kern County, California. October 23, 1912. Plate 11-A in U.S. Geological Survey. Professional paper 116. 1920. #1:/California-Professional paper 116/prw00287 ID. Pack, R.W. 287 Bed filled with fossils at base of Etchegoin formation near Muddy creek, the fossiliferous bed is the one on which the man is standing in photo 280. Photo by R.G. Davies. Kern County, California. October 1912. Plate 11-B in U.S. Geological Survey. Professional paper 116. 1920. #1:/California-Professional paper 116/prw00305 ID. Pack, R.W. 305 Terrace near mouth of Santiago creek. Kern County, California. November 1912. Plate 12-A in U.S. Geological Survey. Professional paper 116. 1920. #1:/California-Professional paper 116/prw00279 ID. Pack, R.W. 279 Terraces on Los Lobos creek; note terraces on several levels, the downward cutting below the lowest terrace shown at the extreme left has been accomplished mainly in the last 30 years. Kern County, California. October 24, 1912. Plate 12-B in U.S. Geological Survey. Professional paper 116. 1920. #1:/California-Professional paper 116/prw0503a ID. Pack, R.W. 503a Form a panorama of Old Jewett & Blodgett Asphalt refinery south of Pioneer, looking north from hill above refinery in sec. 13, T.11 N., R. 24 W., note wells in Maricopa Flats in distance. Kern County, California. May 1916. Plate 13-A in U.S. Geological Survey. Professional paper 116. 1920. #1:/California-Professional paper 116/prw0503b ID. Pack, R.W. 503b Form a panorama of Old Jewett & Blodgett Asphalt refinery south of Pioneer, looking north from hill above refinery in sec. 13, T.11 N., R. 24 W., note wells in Maricopa Flats in distance. Kern County, California. May 1916. Plate 13-A in U.S. Geological Survey. Professional paper 116. 1920. #1:/California-Professional paper 116/prw0288b ID. Pack, R.W. 288b Form a panorama of terrace gravels along San Emigdio creek about 2 miles from edge of San Joaquin valley. Looking southwest across the canyon. The gravels here are almost 200 feet thick and lie horizontal. San Emigdio Mountain is the flat-topped mountain at the left of the center. Kern County, California. October 31, 1912. Plate 13-B in U.S. Geological Survey. Professional paper 116. 1920. #1:/California-Professional paper 116/prw0288a ID. Pack, R.W. 288a Form a panorama of terrace gravels along San Emigdio creek about 2 miles from edge of San Joaquin valley. Looking southwest across the canyon. The gravels here are almost 200 feet thick and lie horizontal. San Emigdio Mountain is the flat-topped mountain at the left of the center. Kern County, California. October 31, 1912. Plate 13-B in U.S. Geological Survey. Professional paper 116. 1920. #1:/California-Professional paper 116/prw00295 ID. Pack, R.W. 295 Unconformity between late Tertiary gravels and tilted Pleistocene or recent gravels in San Emigdio region, looking east across first arroyo west of San Emigdio creek. Kern County, California. November 3, 1912. Plate 14-A, with sketch, in U.S. Geological Survey. Professional paper 116. 1920. #1:/California-Professional paper 116/prw00506 ID. Pack, R.W. 506 Crude derrick over a well drilled in the (1890) nineties, this well furnished oil for the old refinery shown in plate 33-A. Kern County, California. June 1916. Plate 32-A in U.S. Geological Survey. Professional paper 116. 1920. #1:/California-Professional paper 116/prw00475 ID. Pack, R.W. 475 Derrick and gas trap in Maricopa Flat, the derrick (at the left) is more than 100 feet high; note the difference between hit and shown in photo 506. Kern County, California. September 1914. Plate 32-B in U.S. Geological Survey. Professional paper 116. 1920. #1:/California-Professional Paper 116/prw0470a ID. Pack, R.W. 470a Form a panorama of Maricopa flat, Sunset Oil field, looking northward from sec. 5, T.11 N., R. 23 W. The low hill in the center is the topographic expression of the Thirty-five anticline; wells in sec. 4, T. 11 N., R. 23 W., are shown at the extreme right. Kern County, California. September 1914. Plate 33-B in U.S. Geological Survey. Professional Paper 116. 1920. #1:/California-Professional Paper 116/prw0470b ID. Pack, R.W. 470b Form a panorama of Maricopa flat, Sunset Oil field, looking northward from sec. 5, T.11 N., R. 23 W. The low hill in the center is the topographic expression of the Thirty-five anticline; wells in sec. 4, T. 11 N., R. 23 W., are shown at the extreme right. Kern County, California. September 1914. Plate 33-B in U.S. Geological Survey. Professional Paper 116. 1920. #1:/California-Professional Paper 116/prw0470c ID. Pack, R.W. 470c Form a panorama of Maricopa flat, Sunset Oil field, looking northward from sec. 5, T.11 N., R. 23 W. The low hill in the center is the topographic expression of the Thirty-five anticline; wells in sec. 4, T. 11 N., R. 23 W., are shown at the extreme right. Kern County, California. September 1914. Plate 33-B in U.S. Geological Survey. Professional Paper 116. 1920. #1:/California-Professional paper 116/prw00502 ID. Pack, R.W. 502 Flowing well being brought in, Sunset Oil field; well no. 30 of Ethel D. Oil Co. This well was soon controlled and flowed a few hundred barrels daily. Kern County, California. June 3, 1916. Plate 41-A in U.S. Geological Survey. Professional Paper 116. 1920. #1:/California-Professional paper 116/rgs00096 ID. Rogers, G.S. 96 Lakeview No. 2 gusher, this photograph was taken a few days after the well had come. Kern County, California. May 20, 1914. Plate 41-B in U.S. Geological Survey. Professional Paper 116. 1920. #1:/California-Professional paper 116/rgs00166 ID. Rogers, G.S. 166 Casings corroded by water in Midway Oil field, these were pulled from a well of the Honolulu Consolidated Oil Co. in Buena Vista Hills. They had been in the well only about 4 years, close-up. Kern County, California. 1915. Portion is Plate 45-A in U.S. Geological Survey. Professional Paper 116. 1920. #1:/California-Professional paper 116/rgs00165 ID. Rogers, G.S. 165 Casings corroded by water in Midway Oil field, these were pulled from a well of the Honolulu Consolidated Oil Co. in Buena Vista Hills. They had been in the well only about 4 years, general view. Kern County, California. 1915. Plate 45-B in U.S. Geological Survey. Professional paper 116. 1920. #1:/Washington-Professional paper 7/rtf00012 ID. Rixon, T.F. 12 Mount Olympus. Washington. Circa 1899. Plate 3-A in U.S. Geological Survey, Professional paper 7. 1902. #1:/Washington-Professional paper 7/rtf00018 ID. Rixon, T.F. 18 Divide between Queets and Queniult Rivers. Washington. Circa 1899. Plate 3-B in U.S. Geological Survey, Professional paper 7. 1902. #1:/Washington-Professional paper 7/rtf00019 ID. Rixon, T.F. 19 Lake on divide between Queets and Hoh Rivers. Washington. Circa 1899. Plate 5-A in U.S. Geological Survey, Professional paper 7. 1902. #1:/Washington-Professional paper 7/rtf00004 ID. Rixon, T.F. 4 Evergreen Post Office. Washington. Circa 1899. Plate 6-A in U.S. Geological Survey, Professional paper 7. 1902. #1:/Washington-Professional paper 7/rtf00013 ID. Rixon, T.F. 13 Ranch in sec. 14, T.21 N., R. 10 W. Washington. Circa 1899. Plate 6-B in U.S. Geological Survey, Professional paper 7. 1902. #1:/Washington-Professional paper 7/rtf00009 ID. Rixon, T.F. 9 Different ranches in Queets River valley. Washington. Circa 1899. Plates 7-A and B respectively in U.S. Geological Survey, Professional paper 7. 1902. #1:/Washington-Professional paper 7/rtf00010 ID. Rixon, T.F. 10 Different ranches in Queets River valley. Washington. Circa 1899. Plates 7-A and B respectively in U.S. Geological Survey, Professional paper 7. 1902. #1:/Washington-Professional paper 7/rtf00015 ID. Rixon, T.F. 15 House in sec. 12, T.24 N., R.11 W. Washington. Circa 1899. Plate 8-A in U.S. Geological Survey, Professional paper 7. 1902. #1:/Washington-Professional paper 7/rtf00011 ID. Rixon, T.F. 11 Granville, at mouth of Queniult River. Washington. Circa 1899. Plate 8-B in U.S. Geological Survey, Professional paper 7. 1902. #1:/Washington-Professional paper 7/rtf00003 ID. Rixon, T.F. 3 Fir spruce and hemlock in Queets River bottom. Washington. Circa 1899. Plate 10-B in U.S. Geological Survey, Professional paper 7. 1902. #1:/Washington-Professional paper 7/rtf00005 ID. Rixon, T.F. 5 Lake on divide between Queets and Hoh Rivers. Olympic Forest Reserve, Washington. ca. 1900. Plate 5-A in U.S. Geological Survey, Professional paper 7. 1902. #1:/Washington-Professional paper 7/rtf00006 ID. Rixon, T.F. 6 Fir 43 feet in circumference. Washington. Circa 1899. Plate 11-A in U.S. Geological Survey, Professional paper 7. 1902. #1:/Washington-Professional paper 7/rtf00017 ID. Rixon, T.F. 17 Hemlock and lovely fir. Washington. Circa 1899. Plate 13-B in U.S. Geological Survey, Professional paper 7. 1902. #1:/Washington-Professional paper 7/rtf00016 ID. Rixon, T.F. 16 Lovely fir. Washington. Circa 1899. Plate 14-B in U.S. Geological Survey, Professional paper 7. 1902 #1:/Washington-Professional paper 7/rtf00020 ID. Rixon, T.F. 20 Forest on range above head of West Fork of Satsop River. Washington. Circa 1899. Plate 15-A in U.S. Geological Survey, Professional paper 7. 1902. #1:/Washington-Professional paper 7/rtf00014 ID. Rixon, T.F. 14 Lovely fir 5 feet in diameter. Washington. Circa 1899. Plate 15-B in U.S. Geological Survey, Professional paper 7. 1902. #1:/Washington-Professional paper 7/rtf00008 ID. Rixon, T.F. 8 Cedar. Washington. Circa 1899. Plate 17 in U.S. Geological Survey, Professional paper 7. 1902. #1:/Washington-Professional paper 7/rtf00007 ID. Rixon, T.F. 7 Skid road. Washington. Circa 1899. Plate 18-B in U.S. Geological Survey, Professional paper 7. 1902. #1:/Washington-Professional paper 7/rtf00002 ID. Rixon, T.F. 2 Loading logs on railway. Washington. Circa 1899. Plate 19 in U.S. Geological Survey, Professional paper 7. 1902. #1:/Washington-Professional paper 7/rtf00001 ID. Rixon, T.F. 1 Train of logs on Northern Pacific railway. Washington. Circa 1899. Plate 20 in U.S. Geological Survey, Professional paper 7. 1902. #1:/Nebraska-Professional paper 17/dnh00306 ID. Darton, N.H. 306 Courthouse and Jail Rocks from the south, Courthouse Rock irrigation canal in the foreground. Cheyenne County, Nebraska. 1897. Plate 4 in U.S. Geological Survey. Professional paper 17. 1903. #1:/Nebraska-Professional paper 17/dnh00311 ID. Darton, N.H. 311 Jail Rock from the west. Cheyenne County, Nebraska. 1897. Plate 5 in U.S. Geological Survey. Professional paper 17. 1903; plate 7-A in U.S. Geological Survey. Bulletin 612. 1915: Figure 18 in U.S. Geological Survey. Folio 87. 1903. #1:/Nebraska-Professional paper 17/dnh00339 ID. Darton, N.H. 339 Smokestack Rock from the east. Showing outliers of conglomerate in Arikaree formation. Banner County, Nebraska. 1897. Plate 6 in U.S. Geological Survey. Professional paper 17. 1903. #1:/Nebraska-Professional paper 17/dnh00342 ID. Darton, N.H. 342 "Twin Sisters", Banner County, Nebraska. 1897. Plate 7-A in U.S. Geological Survey. Professional paper 17. 1903; Figure 19 in U.S. Geological Survey. Folio 87.1903. #1:/Nebraska-Professional paper 17/dnh00327 ID. Darton, N.H. 327 Wind erosion in Gering formation. Banner County, Nebraska. 1897. Plate 7-B in U.S. Geological Survey. Professional paper 17. 1903; Figure 22 in U.S. Geological Survey. Folio 87.1903. #1:/Nebraska-Professional paper 17/dnh00365 ID. Darton, N.H. 365 Typical sandhills in western Cheyenne County, 15 miles north of Camp Clarke, leeward side, looking west. Nebraska. 1897. Plate 13-A in U.S. Geological Survey. Professional paper 17. 1903; ' Plate 6 in U.S. Geological Survey. Folio 212.1919. #1:/Nebraska-Professional paper 17/dnh00366 ID. Darton, N.H. 366 Typical sandhills in western Cheyenne County, 15 miles north of Camp Clarke, windward side, looking southeast, showing blowouts. Plate 13-B in U.S. Geological Survey. Professional paper 17. 1903. #1:/Nebraska-Professional paper 17/dnh00323 ID. Darton, N.H. 323 Conglomerate at base of Ogalalla formation 5 miles south-southeast of Redington. The conglomerate lies on Arikaree formation. Cheyenne County, Nebraska. 1897. Plate 14- A, in U.S. Geological Survey. Professional paper 17. 1903. #1:/Nebraska-Professional paper 17/dnh00344 ID. Darton, N.H. 344 Conglomerate in Arikaree formation 3 miles due south of Larissa, Scotts Bluff County, Nebraska, looking northwest. Plate 14-B in U.S. Geological Survey. Professional paper 17. 1903: figure 20 in U.S. Geological Survey. Folio 88. 1903 #1:/Nebraska-Professional paper 17/dnh00341 ID. Darton, N.H. 341 Smokestack Rock, looking east, near view; conglomerate in Arikaree formation. Banner County, Nebraska. 1897. Plate 16 in U.S. Geological Survey. Professional paper 17. 1903; figure 20 in U.S. Geological Survey. Folio 87. 1903. #1:/Nebraska-Professional paper 17/dnh00362 ID. Darton, N.H. 362 Butte of Arikaree formation, Sowbelly Canyon. Sioux County, Nebraska. 1897. Plate 17- A in U.S. Geological Survey. Professional paper 17. 1903: Plate 109 in U.S. Geological Survey. 19th Annual Report, part 5. 1899. #1:/Nebraska-Professional paper 17/dnh00361 ID. Darton, N.H. 361 Arikaree formation on Brule clay, southeast portion of Sioux County, Nebraska. 1897. Plate 17-B in U.S. Geological Survey. Professional paper 17. 1903. #1:/Nebraska-Professional paper 17/dnh00363 ID. Darton, N.H. 363 Blowout with core, Arikaree formation, 3 miles south of Harrison. Sioux County, Nebraska. 1897. Plate 18-A in U.S. Geological Survey. Professional paper 17. 1903. #1:/Nebraska-Professional paper 17/dnh00328 ID. Darton, N.H. 328 Pipy concretions, Arikaree formation, Scotts Bluff County, Nebraska. 1897. Plate 18-B in U.S. Geological Survey. Professional paper 17. 1903. #1:/Nebraska-Professional paper 17/dnh00364 ID. Darton, N.H. 364 Daemonelix beds in Arikaree formation at head of Little Monroe Canyon. Sioux County, Nebraska. 1897. Plate 19 in U.S. Geological Survey. Professional paper 17. 1903. #1:/Nebraska-Professional paper 17/dnh00401 ID. Darton, N.H. 401 Gering formation with fault near Rutland, Dawes County, Nebraska. 1897. Plate 20 in U.S. Geological Survey. Professional paper 17. 1903; Plate 24-A in Water-supply paper 489. 1923. #1:/Nebraska-Professional paper 17/dnh00314 ID. Darton, N.H. 314 Gering formation, lying unconformably on Brule clay, with conglomeratic beds, 4 miles northwest of Redington (man's hand is the contact). Cheyenne County, Nebraska. 1897. Plate 25-A in U.S. Geological Survey. Professional paper 17. 1903. #1:/Nebraska-Professional paper 17/dnh00313 ID. Darton, N.H. 313 Gering formation, lying unconformably on Brule clay, 2 miles southwest of Chimney Rock. Cheyenne County, Nebraska. 1897. Plate 25-B in U.S. Geological Survey. Professional paper 17. 1903. #1:/Nebraska-Professional paper 17/dnh00356 ID. Darton, N.H. 356 General view, Badlands at foot of Scotts Bluff. Scotts Bluff County, Nebraska. 1897. Plate 30 in U.S. Geological Survey. Professional paper 17. 1903: Figure 21 in U. S. Geological Survey. Folio 88. 1903. #1:/Nebraska-Professional paper 17/dnh00355 ID. Darton, N.H. 355 Near view, badlands at foot of Scotts Bluff. Scotts Bluff County, Nebraska. 1897. Plate 31 in U.S. Geological Survey. Professional paper 17. 1903: Figure 23 in U. S. Geological Survey. Folio 88. 1903. #1:/Nebraska-Professional paper 17/dnh00343 ID. Darton, N.H. 343 Lens of coarse material in Brule formation, 4 miles south of Gering, Scotts Bluff County, Nebraska. 1897. Plate 32-A in U.S. Geological Survey. Professional paper 17. 1903: Figure 22 in U. S. Geological Survey. Folio 88. 1903. #1:/Nebraska-Professional paper 17/dnh00368 ID. Darton, N.H. 368 "Toadstool Park" in Badlands (Brule formation) northwest of Adelia, Sioux County, Nebraska. 1897. Plate 34 in U.S. Geological Survey. Professional paper 17. 1903 #1:/Washington-Professional paper 19/wil00069 ID. Willis, B. 69 View of high Cascades from head of Gold Creek, showing uniformity of altitudes. Chelan County, Washington. 1900. Plate 9 in U.S. Geological Survey. Professional paper 19. 1903. #1:/Washington-Professional paper 19/wil00210 ID. Willis, B. 210 View of high Cascades from near Cascade Pass, showing uniformity of altitudes. Skagit County, Washington. 1900. Plate 10 in U.S. Geological Survey. Professional paper 19. 1903. #1:/Washington-Professional paper 19/wil00165 ID. Willis, B. 165 View in Navarre Coulee. Chelan County, Washington. 1900. Plate 11 in U.S. Geological Survey. Professional paper 19. 1903. #1:/Washington-Professional paper 19/wil00182 ID. Willis, B. 182 Narrows of Lake Chelan. Chelan County, Washington. 1900. Plate 13 in U.S. Geological Survey. Professional paper 19. 1903. #1:/Washington-Professional paper 19/wil00190 ID. Willis, B. 190 View from Chelan Butte, looking southwest down the Columbia Valley. Chelan County, Washington. 1900. Plate 14 in U.S. Geological Survey. Professional paper 19. 1903. #1:/Washington-Professional paper 19/wil00191 ID. Willis, B. 191 View from Chelan Butte, looking northwest over lower Lake Chelan to Stormy Mountain and Navarre Peaks. Chelan County, Washington. 1900. Plate 15 in U.S. Geological Survey. Professional paper 19. 1903. #1:/Washington-Professional paper 19/wil00209 ID. Willis, B. 209 Southern slope of Boston Mountain showing inclined joint planes. Skagit County, Washington. 1900. Plate 20-A in U.S. Geological Survey. Professional paper 19. 1903. #1:/Washington-Professional paper 19/wil00204 ID. Willis, B. 204 Pinnacles southwest of Cascade Pass, showing vertical jointing. Skagit County, Washington. 1900. Plate 20-B in U.S. Geological Survey. Professional paper 19. 1903. #1:/Arizona-Professional paper 21/rfl00369 ID. Ransome, F.L. 369 San Pedro valley and Huachuca Range from the Mule Mountains. Cochise County, Arizona. November 25, 1902. Plate 5-A in U.S. Geological Survey. Professional paper 21. 1904. #1:/Arizona-Professional paper 21/rfl00438 ID. Ransome, F.L. 438 Bisbee from Sacramento Hill, Holbrook shaft in foreground, Czar shaft in middle. Cochise County, Arizona. December 19, 1902. Plate 5-B in U.S. Geological Survey. Professional paper 21. 190, figure 2 in U.S. Geological Survey Folio 112. 1904. #1:/Arizona-Professional paper 21/rfl00392 ID. Ransome, F.L. 392 The Mount Martin Paleozoic section on the northeast slope of Escabrosa ridge west of Bisbee. Cochise County, Arizona. November 28, 1902. Plate 6-A, with geologic sketch, in U.S. Geological Survey. Professional paper 21. 1904. #1:/Arizona-Professional paper 21/rfl00399 ID. Ransome, F.L. 399 Cherty banding of Abrigo limestone, on top of Black Ridge. Cochise County, Arizona. November 28, 1902. Plate 6-B in U.S. Geological Survey. Professional paper 21. 1904, figure 5 in U.S. Geological Survey Folio 112. 1904. #1:/Arizona-Professional paper 21/rfl00404 ID. Ransome, F.L. 404 Cliff of Escabrosa limestone northwest of Don Luis, structure is complicated by faulting, some Naco limestone occurs on crest of ridge in background. Martin and Abrigo limestone underlie slopes in foreground. Cochise County, Arizona. November 28, 1902. Plate 8-A in U.S. Geological Survey. Professional paper 21. 1904. #1:/Arizona-Professional paper 21/rfl00432 ID. Ransome, F.L. 432 Naco Hills from crest of Escabrosa ridge. In the foreground are hills near the mouth of Escacado Canyon, composed of faulted masses of Pinal schists and various Paleozoic formations. In the distance, below the Naco Hills, to the west and southwest is San Pedro valley, stretching southward into Mexico. On the left appears an outlying spur of the San Jose Mountains, beyond which on a clear day may be seen the town of Cananea. Cochise County, Arizona. December 19, 1902. Plate 8-B in U.S. Geological Survey. Professional paper 21. 1904, figure 6 in U.S. Geological Survey Folio 112. 1904. #1:/Arizona-Professional paper 21/rfl00405 ID. Ransome, F.L. 405 Escabrosa limestone conformably overlain by Naco limestone, 1 mile north of Don Luis, the hill on the left is formed of Escabrosa limestone. The base of the Naco limestone outcrops about halfway up the slope on the right. Cochise County, Arizona. November 29, 1902. Plate 9-A in U.S. Geological Survey. Professional paper 21. 1904, figure 3 in U.S. Geological Survey Folio 112. 1904, figure 3 in U.S. Geological Survey Folio 112. 1904. #1:/Arizona-Professional paper 21/rfl00424 ID. Ransome, F.L. 424 Hills carved from Cretaceous beds east of Bisbee. View is northward across Mule Gulch. The prominent white band is the upper member of the Mural limestone, forming the top of Mural Hill on the left and showing the dislocation due to the Mexican Canyon fault. Cochise County, Arizona. December 1, 1902. Plate 9-B in U.S. Geological Survey. Professional paper 21. 1904, figure 7 in U.S. Geological Survey Folio 112. 1904. #1:/Arizona-Professional paper 21/rfl00414 ID. Ransome, F.L. 414 Form a panoramic view northeast from ridge east of Bisbee, showing the topography associated with the Bisbee group. On the right is Mexican Canyon (photo 414) on the left is Dixie Canyon (photo 415). In the foreground is the Mural limestone, which appears also in the distant hills to the left, and as the result of faulting low down in Mexican Canyon. Overlying the Mural limestone is the Cintura formation. In the distance is the broad Sulphur Spring Valley, bounded on the east by the Chiricahua Range. Cochise County, Arizona. December 1, 1902. Plate 13, photo 414 is right portion; photo 415 the left, in U.S. Geological Survey. Professional paper 21. 1904, #1:/Arizona-Professional paper 21/rfl00415 ID. Ransome, F.L. 415 Form a panoramic view northeast from ridge east of Bisbee, showing the topography associated with the Bisbee group. On the right is Mexican Canyon (photo 414) on the left is Dixie Canyon (photo 415). In the foreground is the Mural limestone, which appears also in the distant hills to the left, and as the result of faulting low down in Mexican Canyon. Overlying the Mural limestone is the Cintura formation. In the distance is the broad Sulphur Spring Valley, bounded on the east by the Chiricahua Range. Cochise County, Arizona. December 1, 1902. Plate 13, photo 414 is right portion; photo 415 the left, in U.S. Geological Survey. Professional paper 21. 1904, #1:/Arizona-Professional paper 21/rfl00365 ID. Ransome, F.L. 365 Granite mass of Juniper Flat from Escabrosa Ridge, shows outliers of Cretaceous strata resting upon an even surface of erosion. Cochise County, Arizona. November 25, 1902. Plate 14-A, with geologic sketch, in U.S. Geological Survey. Professional paper 21. 1904, figure 10 in U.S. Geological Survey Folio 112. 1904. #1:/Arizona-Professional paper 21/rfl00422 ID. Ransome, F.L. 422 Glance conglomerate resting upon irregular eroded Naco limestone 1 mile northeast of Black Gap. The conglomerate is thickest at the left side of the picture and thinnest in the saddle on the right. The summit of Gold Hill is visible through the saddle. Cochise County, Arizona. December 1, 1902. Plate 14-B in U.S. Geological Survey. Professional paper 21. 1904, figure 9 in U.S. Geological Survey Folio 112. 1904. #1:/Arizona-Professional paper 21/rfl00420 ID. Ransome, F.L. 420 View southward from Mule Gulch through Black Gap, showing basin floored with Glance conglomerate. The hills on either side of the gap are formed from Paleozoic limestones. Beyond them stretches the Espinal Plain to the foot of the San Jose Mountains. whose dominant peak appears on the sky line to the right of the gap. Cochise County, Arizona. December 1, 1902. Plate 15-A in U.S. Geological Survey. Professional paper 21. 1904. #1:/Arizona-Professional paper 21/rfl00391 ID. Ransome, F.L. 391 Glance conglomerate as exposed 1 mile northwest of Gold Hill. The angular pebbles or fragments are mostly of schist, and range from a fraction of an inch to 3 feet in length. Cochise County, Arizona. November 26, 1902. Plate 15-B in U.S. Geological Survey. Professional paper 21. 1904. #1:/Arizona-Professional paper 21/rfl00370 ID. Ransome, F.L. 370 Porphyry dikes, accompanied by reversed faults, cutting Paleozoic limestones, southwest slope of Escabrosa Ridge, north of Moore Gulch, the Escabrosa limestone forms the cliffs in the background, while the Martin limestone underlies the steep slope below the thick basal bed of the Escabrosa. The Abrigo limestone occupies the fore and middle ground. Cochise County, Arizona. 1902. Plate 17-A in U.S. Geological Survey. Professional paper 21. 1904. #1:/Arizona-Professional paper 21/rfl00373 ID. Ransome, F.L. 373 View westward along the Abrigo fault. The ravine in the foreground is eroded along the fault. On the right are Escabrosa and Martin limestones; on the left Naco limestone, The distant saddle is also determined by the fault which has there brought Bolsa quartzite on the right against Naco limestone on the left. Cochise County, Arizona. November 25, 1902. Plate 17-B in U.S. Geological Survey. Professional paper 21. 1904. #1:/Arizona-Professional paper 21/rfl00367 ID. Ransome, F.L. 367 Dikes in schist on southwest slope of Escabrosa ridge. Cochise County, Arizona. November 25, 1902. Plate 18-A in U.S. Geological Survey. Professional paper 21. 1904. #1:/Arizona-Professional paper 21/rfl00374 ID. Ransome, F.L. 374 Probable volcanic neck 2.5 miles northeast of Naco junction. Cochise County, Arizona. November 25, 1902. Plate 18-B in U.S. Geological Survey. Professional paper 21. 1904. #1:/Arizona-Professional paper 21/rfl00401 ID. Ransome, F.L. 401 Detail of faulted structure on the east side of Escacado Canyon; the cliffs are formed of Escabrosa limestone overlain by Naco limestones. The slope below is underlain by Martin and Abrigo limestones, behind which the Escabrosa has been dropped by faults along the base of the cliffs. In the foreground are knolls of Escabrosa limestone, which has been faulted down against the Abrigo. Cochise County, Arizona. November 28, 1902. Plate 19-A in U.S. Geological Survey. Professional paper 21. 1904, figure 8 in U.S. Geological Survey. Folio 112. 1904. #1:/Arizona-Professional paper 21/rfl00396 ID. Ransome, F.L. 396 Folded and faulted Escabrosa and Naco limestones, as seen from the crest of Escabrosa Ridge, looking west across the head of Escacado Canyon. Cochise County, Arizona. November 28, 1902. Plate 19-B in U.S. Geological Survey. Professional paper 21. 1904. #1:/Arizona-Professional paper 21/rfl00394 ID. Ransome, F.L. 394 Fault between Naco limestone, on left, and Escabrosa limestone on right, crest of Ecabrosa Ridge west of Bisbee. The view is north, the canyon on the right being that extending from Bisbee up to Mule Pass. Cochise County, Arizona. November 28, 1902. Plate 20-A in U.S. Geological Survey. Professional paper 21. 1904. #1:/Arizona-Professional paper 21/rfl00397 ID. Ransome, F.L. 397 View from Escabrosa Ridge across Espinal plain to the San Jose Mountains, in Mexico. In the foreground appear the faulted Paleozoic limestones near the mouth of Escacado Canyon. In the middle ground is the Bisbee West mine. On the right are the Naco Hills and beyond them faintly visible the Cananea Range. Cochise County, Arizona. November 28, 1902. Plate 20-B in U.S. Geological Survey. Professional paper 21. 1904. #1:/Arizona-Professional paper 21/rfl00398 ID. Ransome, F.L. 398 General view eastward from the head of Uncle Sam Gulch over Sacramento Hill to the mouth of Mule Gulch: on the left are Queen Hill and flues of the Copper Queen smelter. In the right middle ground is the Spray shaft and just beyond it Sacramento Hill. Still farther to the right is the Irish Mag shaft. In the distance are the hills carved from the beds of the Bisbee group. Cochise County, Arizona. November 28, 1902. Plate 21-B in U.S. Geological Survey. Professional paper 21. 1904. #1:/Arizona-Professional paper 21/rfl00423 ID. Ransome, F.L. 423 Gold Hill from the northwest, showing overthrust fault. Cochise County, Arizona. December 1, 1902. Plate 22-A, with geologic sketch, in U.S. Geological Survey. Professional paper 21. 1904, figure 11 in U.S. Geological Survey. Folio 112. 1904. #1:/Arizona-Professional paper 21/rfl00383 ID. Ransome, F.L. 383 Gold Hill from the south, showing overthrust fault. Cochise County, Arizona. November 26, 1902. Plate 22-B in U.S. Geological Survey. Professional paper 21. 1904. #1:/Arizona-Professional paper 21/rfl00378 ID. Ransome, F.L. 378 The Glance overthrust fault from the south, the line of the fault is accentuated by a growth of bushes. The nearly horizontal beds above the fault plane are Naco limestone. The easterly dipping beds below the fault plane are Mural limestone. Cochise County, Arizona. November 26, 1902. Plate 23-A in U.S. Geological Survey. Professional paper 21. 1904. #1:/Arizona-Professional paper 21/rfl00418 ID. Ransome, F.L. 418 Bisbee from the southeast, looking up Mule Gulch, the town lies in the canyon under the fumes of the smelter. The dark knob in the middle of the picture is Sacramento Hill, to the left of it may be seen the Spray and Irish Mag shafts. Cochise County, Arizona. December 1, 1902. Plate 23-B in U.S. Geological Survey. Professional paper 21. 1904. #1:/Arizona-Professional paper 21/rfl00428 ID. Ransome, F.L. 428 Sacramento Hill from the north showing the various mines in limestone around the intrusive mass of porphyry. In the foreground is the old Copper Queen slag dump, beneath which and low ground just southwest of it occurred some of the largest ore bodies. On the right is the Holbrook shaft, and just above it in the picture, the Spray shaft. To the left of the Spray is the Calumet and Arizona mine, and some distance to the left of that the Lowell mine. The mountains visible in the distance are in Mexico, the conical peak on the right being Mount Magellan, and the group on the left the Morita Hills. Cochise County, Arizona. December 7, 1902. Plate 24-A in U.S. Geological Survey. Professional paper 21. 1904. #1:/Arizona-Professional paper 21/rfl00440 ID. Ransome, F.L. 440 Irish Mag and Spray shafts, from Sacramento Hill, the Spray is on the right. Cochise County, Arizona. December 19, 1902. Plate 24-B in U.S. Geological Survey. Professional paper 21. 1904. #1:/Montana-Professional paper 27/linw0128 ID. Lindgren, W. 128 Detail of gneiss cliff on north side of Mill Creek canyon, near mouth, cliff 1,500 feet high. Ravalla County, Montana. 1899. Plate 6-A in U.S. Geological Survey. Professional paper 27. 1904. #1:/Montana-Professional paper 27/linw0016 ID. Lindgren, W. 16 View south from Hamilton, shows regular slope of gneiss zone of Bitterroot Mountains. Ward Peak is seen in the center background and below it the ridge between Roaring Lion and Sawtooth Creeks. Ravalli County, Montana. 1899. Plate 6-B in U.S. Geological Survey. Professional paper 27. 1904. #1:/Montana-Professional paper 27/linw0019 ID. Lindgren, W. 19 Bitterroot Range, looking northwest from Hamilton; showing gentle eastward dip of gneiss zone and deeply incised canyons of Blodgett and Mill creeks, with precipitous sides. Ravalli County, Montana. 1899. Figure 2 as a sketch in U.S. Geological Survey. Professional paper 27. 1904. #1:/Montana-Professional paper 27/linw0131 ID. Lindgren, W. 131 Upper valley of Mill Creek, Bitterroot Range, looking east from main divide. Note pronounced U-shape of valley, narrowing toward the lower part. The prevailing rock is granite. Ravalli County, Montana. 1899. Plate 7-A in U.S. Geological Survey. Professional paper 27. 1904. #1:/Montana-Professional paper 27/linw0156 ID. Lindgren, W. 156 Iron Crown quartz mill, Newsome Creek. Idaho. 1899. Plate 15-B in U.S. Geological Survey. Professional paper 27. 1904. #1:/Portraits/port0001 ID. Portraits Collection 1 Clarence King, first Director of the USGS. Served from 1879-1881. 1879. #1:/Portraits/port0002 ID. Portraits Collection 2 John Wesley Powell, second Director of the USGS. Served from 1881-1894. Profile early in his term of office as Director. #1:/Portraits/port0004 ID. Portraits Collection 4 George Otis Smith, fourth Director of the USGS. Early in his term of office. Served from 1907-1930. #1:/Portraits/port0005 ID. Portraits Collection 5 George Otis Smith, fourth Director of the USGS. Later in his career. Served from 1907-1930. #1:/Portraits/port0006 ID. Portraits Collection 6 Walter Curran Mendenhall, fifth Director of the USGS. Served from 1930-1943. #1:/Portraits/port0007 ID. Portraits Collection 7 Charles Dolittle Walcott, third Director of the USGS. Served 1894-1907. Secretary of the Smithsonian Institution from Jan 31, 1907 until has death Feburary 9, 1927. circa 1922. #1:/Portraits/port0009 ID. Portraits Collection 9 Ferdinand V. Hayden, about the time of his directorship of the US Geological Survey of the Territories; in Union Army uniform during the Civil War, apparently the only time he actually practiced medicine. 1870. #1:/Portraits/port0011 ID. Portraits Collection 11 Israel Cook Russell, late in life, first geologist, to explore Alaska for the USGS from circa 1900. #1:/Portraits/port0015 ID. Portraits Collection 15 Charles Dolittle Walcott, third Director USGS. Served 1894-1907. Secretary of the Smithsonian Institution from Jan 31, 1907 until has death Feburary 9, 1927. circa 1900. #1:/Portraits/port0020 ID. Portraits Collection 20 Philip S. Smith, second chief of Alaska Geology, USGS. circa 1925. #1:/Portraits/port0032 ID. Portraits Collection 32 Alfred Hulse Brooks, for whom the Brooks Range in Alaska is named, first chief of Alaska Geology, and Alaska Railroad Commission, possibly at the time of appointment to the commission. #1:/Portraits/port0035 ID. Portraits Collection 35 Commemorative drawing with topographic contour lines, in the likeness of Stephen J. Kubel, chief of map engraving, probably at his retirement (with 40 years); Portraits 91, obvious source for this drawing. Washington, DC. #1:/Portraits/port0039 ID. Portraits Collection 39 Walter Curran Mendenhall, 5th Director of USGS. Served from 1930-1943. #1:/Portraits/port0042 ID. Portraits Collection 42 Clarence Edward Dutton, in Union Army uniform, author of Map of Utah Territory, early works on geology of Grand Canyon district. circa 1864. #1:/Portraits/port0043 ID. Portraits Collection 43 Clarence Edward Dutton, author of Map of Utah Territory, early works on geology of Grand Canyon district. circa 1870's. #1:/Portraits/port0045 ID. Portraits Collection 45 Chief Geographer, about 1916, Robert A. Marshall looking forward. #1:/Portraits/port0051 ID. Portraits Collection 51 Unknown #1:/Portraits/port0052 ID. Portraits Collection 52 Oscar Edward Meinzer, first chief, groundwater resources, possibly at that time. He was an early or first scientist to recognize the elasticity of soils, and artesian wells, and its importance, to measuring water resources. circa 1916. #1:/Portraits/port0055 ID. Portraits Collection 55 John Karl Hillers, probably in the 1890's when he was chief photographer at the USGS, during Powell's term of office. #1:/Portraits/port0058 ID. Portraits Collection 58 Charles R. Van Hise, pioneer of microscopic petrology in the United States, probably in 1916. #1:/Portraits/port0061 ID. Portraits Collection 61 Walter Curran Mendenhall, 5th Director of USGS. Served from 1930-1943. #1:/Portraits/port0062 ID. Portraits Collection 62 Henry Gannett, Chief Geographer, dubbed father of American mapmaking, geographer for the 10th Census. 1899. #1:/Portraits/port0077 ID. Portraits Collection 77 Series of different photos of Director, George Otis Smith: probably on his 10th anniversary of his appointment, at work in his office at the Hooe Building, Washington, DC, around 1918; flag in background (Portraits 128), refers to members of the Survey, serving in the military during World War I. #1:/Portraits/port0078 ID. Portraits Collection 78 John Karl Hillers, probably in the 1890's when he was chief photographer at the USGS, during Powell's term of office. circa 1890's. #1:/Portraits/port0088 ID. Portraits Collection 88 Chief Geographer, about 1916, Robert A. Marshall looking to the left. #1:/Portraits/port0089 ID. Portraits Collection 89 William Henry Holmes, artist with Hayden Survey. Born 1846. Died 1933. Photo probably is taken in his 50's. Circa 1900. #1:/Portraits/port0091 ID. Portraits Collection 91 Commemorative drawing with topographic contour lines, in the likeness of Stephen J. Kubel, chief of map engraving, probably at his retirement (with 40 years); Portraits 91, obvious source for this drawing. Washington, DC. #1:/Portraits/port0093 ID. Portraits Collection 93 Nelson Horatio Darton, in formal attire, about 1895. #1:/Portraits/port0110 ID. Portraits Collection 110 Series of different photos of Director, George Otis Smith: probably on his 10th anniversary of his appointment, at work in his office at the Hooe Building, Washington, DC, around 1918; flag in background (Portraits 128), refers to members of the Survey, serving in the military during World War I. #1:/Portraits/port0125 ID. Portraits Collection 125 Claude Hale Birdseye, chief topographic engineer, leader of Colorado River expedition of 1923, taken in 1916. #1:/Portraits/port0128 ID. Portraits Collection 128 Series of different photos of Director, George Otis Smith: probably on his 10th anniversary of his appointment, at work in his office at the Hooe Building, Washington, DC, around 1918; flag in background (Portraits 128), refers to members of the Survey, serving in the military during World War I. #1:/Portraits/port0129 ID. Portraits Collection 129 Grove Karl Gilbert, some referred to him as the father of geomorphology, others as "a great engine of geology", about 1910. #1:/Portraits/port0131 ID. Portraits Collection 131 Secretary of the Interior, John Barton Payne at his desk in 1920. Served from March 15, 1920 to March 4, 1921. #1:/Portraits/port0143 ID. Portraits Collection 143 Secretary of the Interior, John Barton Payne at his desk in 1920. Served from March 15, 1920 to March 4, 1921. #1:/Portraits/port0133 ID. Portraits Collection 133 Secretary of the Interior, Franklin Knight Lane. Served from March 6, 1913 to Febrary 29, 1920. #1:/Portraits/port0141 ID. Portraits Collection 141 Secretary of the Interior, Roy Owen West, probably from a formal oil painting. Served from July 25, 1928 to March 4, 1929. #1:/Portraits/port0148 ID. Portraits Collection 148 Samuel Franklin Emmons, in academic attire. Member of the King Survey, co-author with Arnold Hague of "Descriptive Geology of the 40th Parallel", wrote a paper titled "The Secondary Enrichment of Ore Deposits", stating the principles of sulfide enrichment by descending waters, which have been of value to world mining engineers. #1:/Washington DC-Images/port0178 ID. Portraits Collection 178 Personnel of the U.S. Geological Survey's Accounts Division. Washington, D.C. 1926. Photograph on page 30, Images of the U.S. Geological Survey, 1879-1979. #1:/Portraits/port0212 ID. Portraits Collection 212 Sir Archibald Geikie, Director General, British Geological Survey. #1:/Portraits/port0213 ID. Portraits Collection 213 William Henry Jackson, pioneer photographer, in his youth; considerably later in his life. circa 1880. #1:/Portraits/port0226 ID. Portraits Collection 226 Claude Hale Birdseye, chief topographic engineer, leader of Colorado River expedition of 1923, later in life. #1:/Portraits/port0228 ID. Portraits Collection 228 William E. Wrather, Director, USGS. Served from 1943-1956. #1:/Portraits/port0242 ID. Portraits Collection 242 Oscar Edward Meinzer, first chief, groundwater resources, possibly at that time. He was an early or first scientist to recognize the elasticity of soils, and artesian wells, and its importance, to measuring water resources; later in life, at his desk. 1934. #1:/Portraits Collection/port0245 ID. Portraits Collection 245 Charles B. Hunt about 1950. #1:/Portraits/port0264 ID. Portraits Collection 264 President Franklin D. Roosevelt shaking hands with Wiley Post. circa 1932-1934. #1:/Portraits/port0269 ID. Portraits Collection 269 William Henry Jackson, pioneer photographer, in his youth; considerably later in his life. circa 1939. #1:/Portraits Collection/port0270 ID. Portraits Collection 270 Group portrait of left to right: Joseph A. Holmes, Charles D. Walcott and Henry Gannett, seated on an outcrop. August 12, 1897. #1:/Portraits Collection/port0286 ID. Portraits Collection 286 Arthur Alan Baker, an Associate Director of the U.S. Geological Survey, 1956 to 1969. #1:/Portraits/port0287 ID. Portraits Collection 287 Dr. Thomas B. Nolan, Director of the USGS, circa 1959. Served from 1956-1965. #1:/Portraits Collection/port0295 ID. Portraits Collection 295 J.B. Hadley #1:/Portraits Collection/port0298 ID. Portraits Collection 298 Clyde P Ross. #1:/Portraits Collection/port0300 ID. Portraits Collection 300 George F. Loughlin. #1:/Portraits Collection/port0301 ID. Portraits Collection 301 C.W. Hayes #1:/Portraits Collection/port0302 ID. Portraits Collection 302 Frank C. Schrader. 1896 #1:/Portraits/port0305 ID. Portraits Collection 305 Charles R. Van Hise, pioneer of microscopic petrology in the United States, probably in 1916: cap and gown with diploma (?) in hand: #1:/Portraits/port0309 ID. Portraits Collection 309 William E. Wrather, Director, USGS. Served from 1943-1956. #1:/Portraits/port0326 ID. Portraits Collection 326 John Wesley Powell, second Director of the USGS. Served from 1881-1894. Profile late in his term of office as Director. #1:/Portraits Collection/port0336 ID. Portraits Collection 336 C.E. Dobbin. #1:/Portraits Collection/port0337 ID. Portraits Collection 337 J.B. Eby #1:/Portraits Collection/port0342 ID. Portraits Collection 342 U.S. Grant #1:/Portraits Collection/port0344 ID. Portraits Collection 344 E.T. Hancock. #1:/Portraits Collection/port0350 ID. Portraits Collection 350 A.L. Kimball. #1:/Portraits Collection/port0359 ID. Portraits Collection 359 Sidney Paige. #1:/Portraits Collection/port0362 ID. Portraits Collection 362 Ralph W. Stone. 1901. #1:/Portraits Collection/port0374 ID. Portraits Collection 374 Timothy William Stanton. 1903. #1:/Portraits/port0379 ID. Portraits Collection 379 Frederick Haynes Newell. Chief Hydrographer with the USGS; first head of U.S. Reclamation Service. #1:/Portraits Collection/port0511 ID. Portraits Collection 511 Charles Butts. 1901. #1:/Portraits Collection/port0512 ID. Portraits Collection 512 L.M Prindle. #1:/Portraits Collection/port0513 ID. Portraits Collection 513 T.N. Dale. #1:/Portraits Collection/port0533 ID. Portraits Collection 533 Stanley W. Lohman. #1:/Portraits Collection/port0549 ID. Portraits Collection 549 Alfred Hulse Brooks 1894. #1:/Portraits/port0610 ID. Portraits Collection 610 John Moran. Photographer at Pinogana. Darien Expedition, 1871. Isthmus of Panama. #1:/Portraits/port0684 ID. Portraits Collection 684 Florence Bascom, received the first Ph. D, granted to a woman at Johns Hopkins University, in 1893. Began in 1895 a long career at Bryn Mawr College, including the establishment of the geology department in 1901. The first woman hired as an assistant geologist with USGS in 1896. #1:/Portraits/port0685 ID. Portraits Collection 685 Eleanora Frances Bliss Knopf became a geologist at Bryn Mawr, under F. Bascom, receiving a Ph.D. there in 1912, her dissertation prepared jointly with fellow student Anna Jonas, published by the USGS in 1916, dealt with metamorphic rocks in the Doe Run-Avondale region of Pennsylvania. Appointed as a geologist with the US Geological Survey in 1928. #1:/Portraits/port0724 ID. Portraits Collection 724 Ferdinand V. Hayden, about the time of his directorship of the US Geological Survey of the Territories; in Union Army uniform during the Civil War, apparently the only time he actually practiced medicine. 1865. #1:/Portraits/port0726 ID. Portraits Collection 726 Dr. William Thomas Pecora, Director of the USGS. Served from 1965-1971. Later served as Under Secretary of the Interior. 1965. #1:/Portraits Collection/port0908 ID. Portraits Collection 908 Harold E. Malde #1:/Portraits Collection/port0912 ID. Portraits Collection 912 Robert L Schuster. 1981. #1:/Portraits Collection/port0913 ID. Portraits Collection 913 C. Dan Miller #1:/Portraits Collection/port0915 ID. Portraits Collection 915 Dwight R Crandell. #1:/Portraits/port0916 ID. Portraits Collection 916 Dallas Peck, Director of USGS. Served from 1981-1993. 1981. #1:/Portraits Collection/port0917 ID. Portraits Collection 917 J.C. Reed Jr. Denver, Colorado 1981. #1:/Portraits/port0918 ID. Portraits Collection 918 Major John Wesley Powell at his desk in the Adams Building on F Street, N.W., Washington, DC. ca 1896. Photo courtesy of Smithsonian Institution. #1:/Portraits/port0920 ID. Portraits Collection 920 Joseph A. Holmes, 1st Director, Bureau of Mines, 1910-1915. #1:/Portraits/port0921 ID. Portraits Collection 921 Major John Wesley Powell in his office in the Adams Building, Washington, DC. circa 1896. Photo courtesy of Smithsonian Institution. #1:/Portraits Collection/port0937 ID. Portraits Collection 937 Wallace Walter Atwood. 1901. #1:/Portraits/port0934 ID. Portraits Collection 934 (Charles) David White. Geologist and Paleobotanist. cc. 1930. #1:/Portraits Collection/port0938 ID. Portraits Collection 938 William Clinton Alden. 1901. #1:/Portraits Collection/port0950 ID. Portraits Collection 950 Ernest Francis Burchard. 1904. #1:/Portraits Collection/port0953 ID. Portraits Collection 953 Frank Cathcart Calkins. 1901. #1:/Portraits Collection/port0954 ID. Portraits Collection 954 Marius Robison Campbell 1891. #1:/Portraits Collection/port0955 ID. Portraits Collection 955 Stephen Reid Capps. 1907. #1:/Portraits Collection/port0956 ID. Portraits Collection 956 Frank R. Clark. 1909. #1:/Portraits Collection/port0957 ID. Portraits Collection 957 Theodore Chapin. 1910. #1:/Portraits Collection/port0958 ID. Portraits Collection 958 D. Dale Condit. 1912 #1:/Portraits Collection/port0963 ID. Portraits Collection 963 Rufus Harvey Sargent. Topographic Engineer. 1908. #1:/Portraits Collection/port0965 ID. Portraits Collection 965 Eugene C. Stebinger. 1907. #1:/Portraits/port0972 ID. Portraits Collection 972 Esper S. Larsen. Geologist. #1:/Portraits Collection/port0976 ID. Portraits Collection 976 J.H. Hance. #1:/Portraits Collection/port0978 ID. Portraits Collection 978 John Frederick. Hunter, 1910. #1:/Portraits Collection/port0982 ID. Portraits Collection 982 Charles Joseph Hares. 1910. #1:/Portraits Collection/port0983 ID. Portraits Collection 983 Frank L. Hess. 1904. #1:/Portraits Collection/port0987 ID. Portraits Collection 987 Joseph Paxson. Iddings. circa 1900 #1:/Portraits Collection/port0989 ID. Portraits Collection 989 Bertrand Leroy .Johnson. 1905. #1:/Portraits Collection/port0993 ID. Portraits Collection 993 Arthur Keith. 1888. #1:/Portraits Collection/port0996 ID. Portraits Collection 996 Esper Signius Larsen jr. 1908. #1:/Portraits Collection/port0997 ID. Portraits Collection 997 Willis.Thomas Lee. 1904. #1:/Portraits/port1006 ID. Portraits Collection 1006 Unknown #1:/Portraits Collection/port1007 ID. Portraits Collection 1007 John Beaver Mertie jr. about 1910 #1:/Portraits Collection/port1008 ID. Portraits Collection 1008 Hugh D. Miser. 1911 #1:/Portraits Collection/port1015 ID. Portraits Collection 1015 D.J. Fisher #1:/Portraits Collection/port1016 ID. Portraits Collection 1016 Levi Fatzinger Noble #1:/Portraits Collection/port1020 ID. Portraits Collection 1020 William Clifton Phalen 1904. #1:/Portraits Collection/port1022 ID. Portraits Collection 1022 Max A. Pishel 1907 #1:/Portraits Collection/port1023 ID. Portraits Collection 1023 Joseph Thomas Pardee. 1909 #1:/Portraits Collection/port1027 ID. Portraits Collection 1027 George Burr Richardson. 1900. #1:/Portraits Collection/port1028 ID. Portraits Collection 1028 Gaillard Sherburene Rogers. #1:/Portraits Collection/port1035 ID. Portraits Collection 1035 George Willis Stose. 1894. #1:/Portraits Collection/port1037 ID. Portraits Collection 1037 Lloyd William Stephenson, paleontologist, 1907. #1:/Portraits Collection/port1039 ID. Portraits Collection 1039 Douglas Bovard Sterrett #1:/Portraits/port1045 ID. Portraits Collection 1045 Unknown #1:/Portraits/port1047 ID. Portraits Collection 1047 Unknown #1:/Portraits Collection/port1078 ID. Portraits Collection 1078 George E Becraft. Washington DC, September 1971. #1:/Portraits/port1048 ID. Portraits Collection 1048 Thomas Wayland Vaughan, near the time of his appointment to the U.S. Geological Survey in the 1890's. In 1924, he was appointed director of the University of California's Scripps Biological Research Institution, when he retired in 1936; it was a leading center for oceanography. #1:/Portraits Collection/port1101 ID. Portraits Collection 1101 D.A.Brobst, Washington DC. 1970. #1:/Portraits Collection/port1113 ID. Portraits Collection 1113 J.C Clark. #1:/Portraits Collection/port1143 ID. Portraits Collection 1143 J.P.Eaton #1:/Portraits Collection/port1155 ID. Portraits Collection 1155 R.S. Fiske #1:/Portraits Collection/port1180 ID. Portraits Collection 1180 A. Grantz. #1:/Portraits Collection/port1202 ID. Portraits Collection 1202 Wallace R Hansen at his desk in Denver, Colorado. 1971. #1:/Portraits Collection/port1212 ID. Portraits Collection 1212 T.A. Hendricks #1:/Portraits/port1250 ID. Portraits Collection 1250 Dr. Luna B. Leopold, Senior Research Hydrologist, former Chief Hydrologist (1957 - 1966); member National Academy of Sciences. Circa 1971. #1:/Portraits Collection/port1257 ID. Portraits Collection 1257 John T McGill. #1:/Portraits Collection/port1260 ID. Portraits Collection 1260 Edwin D. McKee #1:/Portraits/port1261 ID. Portraits Collection 1261 Vincent E. McKelvey, Director of the USGS. Served from 1971-1978. 1971. #1:/Portraits Collection/port1275 ID. Portraits Collection 1275 Hugh D. Miser. Washington DC 1966 #1:/Portraits Collection/port1277 ID. Portraits Collection 1277 D. Molenaar #1:/Portraits Collection/port1280 ID. Portraits Collection 1280 James G. Moore. #1:/Portraits Collection/port1285 ID. Portraits Collection 1285 Melvin R. Mudge #1:/Portraits/port1298 ID. Portraits Collection 1298 Dr. William Thornas Pecora, Director of USGS, 1965-1971. Geologist. #1:/Portraits Collection/port1302 ID. Portraits Collection 1302 D.W. Peterson #1:/Portraits Collection/port1331 ID. Portraits Collection 1331 E.T. Ruppel #1:/Portraits/port1382 ID. Portraits Collection 1382 Ogden L. Tweto. Geologist. USGS. #1:/Portraits Collection/port1403 ID. Portraits Collection 1403 Eugene M Shoemaker, in his USGS office in Flagstaff, Arizona. n.d. #1:/Portraits Collection/port1439 ID. Portraits Collection 1439 Edwin D. McKee #1:/Portraits Collection/port1573 ID. Portraits Collection 1573 Calvin S. Bromfield, 1972. #1:/Portraits Collection/port1581 ID. Portraits Collection 1581 Robert D Brown. 1972. #1:/Portraits Collection/port1622 ID. Portraits Collection 1622 D. Carroll. #1:/Portraits Collection/port1627 ID. Portraits Collection 1627 W.B Cashion. #1:/Portraits Collection/port1652 ID. Portraits Collection 1652 Robert L. Christiansen #1:/Portraits/port1666 ID. Portraits Collection 1666 William A. Cobban. Geologist. USGS. #1:/Portraits/port1668 ID. Portraits Collection 1668 George V. Cohee. Geologist. USGS. #1:/Portraits Collection/port1673 ID. Portraits Collection 1673 Roger B Colton. #1:/Portraits Collection/port1694 ID. Portraits Collection 1694 H.W Coulter. #1:/Portraits/port1695 ID. Portraits Collection 1695 Anny B. Coury. Geologist. USGS. cc 1979. #1:/Portraits Collection/port1706 ID. Portraits Collection 1706 E.R Cressman. #1:/Portraits Collection/port1787 ID. Portraits Collection 1787 Harold Drewes. #1:/Portraits Collection/port1792 ID. Portraits Collection 1792 W.A. Duffield. #1:/Portraits Collection/port1807 ID. Portraits Collection 1807 G.D. Eberlein. #1:/Portraits Collection/port1855 ID. Portraits Collection 1855 R.B. Finkelman #1:/Portraits Collection/port1874 ID. Portraits Collection 1874 J.C. Forbes. #1:/Portraits/port1879 ID. Portraits Collection 1879 Unknown #1:/Portraits Collection/port1888 ID. Portraits Collection 1888 J.D. Friedman. #1:/Portraits Collection/port1937 ID. Portraits Collection 1937 G.H. Goudarzi #1:/Portraits Collection/port1945 ID. Portraits Collection 1945 G.W. Green. #1:/Portraits Collection/port1976 ID. Portraits Collection 1976 W.B. Hamilton probably in the 1970's. #1:/Portraits/port1993 ID. Portraits Collection 1993 Leonard D. Harris. Geologist. USGS. #1:/Portraits Collection/port1995 ID. Portraits Collection 1995 E.N. Harshman. #1:/Portraits Collection/port2043 ID. Portraits Collection 2043 D.P. Hill. #1:/Portraits Collection/port2056 ID. Portraits Collection 2056 R.T. Holcomb. #1:/Portraits/port2078 ID. Portraits Collection 2078 Thor H. Kiilsgaard. Geologyist. USGS. #1:/Portraits/port2091 ID. Portraits Collection 2091 Ralph W. Imlay. Paleontologist. USGS. #1:/Portraits Collection/port2135 ID. Portraits Collection 2135 Rueben Kachadoorian #1:/Portraits Collection/port2143 ID. Portraits Collection 2143 C.A. Kaye #1:/Portraits Collection/port2192 ID. Portraits Collection 2192 C. Koteff #1:/Portraits Collection/port2236 ID. Portraits Collection 2236 RichardW Lemke. #1:/Portraits Collection/port2255 ID. Portraits Collection 2255 R.M. Lindvall. #1:/Portraits Collection/port2260 ID. Portraits Collection 2260 J.P. Lockwood #1:/Portraits Collection/port2267 ID. Portraits Collection 2267 J. Dave Love #1:/Portraits/port2292 ID. Portraits Collection 2292 Unknown #1:/Portraits Collection/port2325 ID. Portraits Collection 2325 J.F McAllister. #1:/Portraits/port2343 ID. Portraits Collection 2343 Vincent E. McKelvey. Geologist. Director of USGS. 1971-1978. #1:/Portraits Collection/port2347 ID. Portraits Collection 2347 R.J. McLaughlin #1:/Portraits Collection/port2381 ID. Portraits Collection 2381 R.D. Miller #1:/Portraits Collection/port2420 ID. Portraits Collection 2420 B Morrison. #1:/Portraits Collection/port2434 ID. Portraits Collection 2434 Don R. Mullineaux #1:/Portraits Collection/port2447 ID. Portraits Collection 2447 W.H. Nelson #1:/Portraits Collection/port2461 ID. Portraits Collection 2461 D.R. Nichols #1:/Portraits Collection/port2506 ID. Portraits Collection 2506 Frank W. Osterwald. #1:/Portraits Collection/port2517 ID. Portraits Collection 2517 Rick A. Page #1:/Portraits Collection/port2618 ID. Portraits Collection 2618 W.H. Raymond #1:/Portraits Collection/port2624 ID. Portraits Collection 2624 J.C. Reed Jr. 1972. #1:/Portraits Collection/port2682 ID. Portraits Collection 2682 R.J.Ross #1:/Portraits Collection/port2685 ID. Portraits Collection 2685 D.L. Rossman #1:/Portraits Collection/port2692 ID. Portraits Collection 2692 Peter Rowley. #1:/Portraits/port2705 ID. Portraits Collection 2705 Unknown #1:/Portraits/port2709 ID. Portraits Collection 2709 William H. Sando. Geologist and Paleobotanist. USGS. #1:/Portraits Collection/port2716 ID. Portraits Collection 2716 K.A. Sargent #1:/Portraits Collection/port2725 ID. Portraits Collection 2725 J. Schlocker #1:/Portraits Collection/port2727 ID. Portraits Collection 2727 D.L. Schmidt #1:/Portraits/port2753 ID. Portraits Collection 2753 Glenn R. Scott. Geologist. USGS. #1:/Portraits/port2806 ID. Portraits Collection 2806 John D. Oradovich. Geophysicist. USGS. #1:/Portraits Collection/port2872 ID. Portraits Collection 2872 D.A. Swanson #1:/Portraits Collection/port2895 ID. Portraits Collection 2895 Thomas P. Thayer. 1972. #1:/Portraits Collection/port2911 ID. Portraits Collection 2911 Robert I. Tilling. #1:/Portraits Collection/port2925 ID. Portraits Collection 2925 D.E. Trimble. #1:/Portraits/port2934 ID. Portraits Collection 2934 Robert H. Tschudy. Botanist. USGS. #1:/Portraits Collection/port2940 ID. Portraits Collection 2940 Raymond M Turner. #1:/Portraits/port2984 ID. Portraits Collection 2984 Robert E. Wallace about 1972; in 1982: Received his Ph.D. in 1946 from California Institute of Technology, his thesis concerned a portion of the San Andreas Fault. He has served as Western Regional Geologist, as Chief Scientist, Office of Earthquake Studies, among other assignments. #1:/Portraits Collection/port3140 ID. Portraits Collection 3140 D.H. Richter. #1:/Portraits Collection/port3142 ID. Portraits Collection 3142 David J.Varnes #1:/Portraits/port3168 ID. Portraits Collection 3168 J. Thomas Dutro. Jr. Geologist. USGS. #1:/Portraits Collection/port3225 ID. Portraits Collection 3225 W.G. Pierce #1:/Portraits Collection/port3244 ID. Portraits Collection 3244 Mortimer H Staatz. 1972. #1:/Portraits Collection/port3289 ID. Portraits Collection 3289 P. B. King #1:/Portraits Collection/port3303 ID. Portraits Collection 3303 Earl E Brabb, Menlo Park, San Mateo County, California circa 1984. Page 147, upper photograph in U.S. Geological Survey. Earthquake Information Bulletin, v. 16. no.3, May-June 1984. #1:/Portraits/port3304 ID. Portraits Collection 3304 Robert E. Wallace about 1972; in 1982: Received his Ph.D. in 1946 from California Institute of Technology, his thesis concerned a portion of the San Andreas Fault. He has served as Western Regional Geologist, as Chief Scientist, Office of Earthquake Studies, among other assignments. #1:/Portraits Collection/port3307 ID. Portraits Collection 3307 John C. Tinsley, 1983. Page 158, lower photo in U.S. Geological Survey, Earthquake Information Bulletin. v. 15 no.4, July-August 1983. #1:/Portraits Collection/port3316 ID. Portraits Collection 3316 S.Warren Hobbs. #1:/Portraits Collection/port3321 ID. Portraits Collection 3321 Group portrait from left to right; Frank C. Schrader, J. Edward Spurr and Harold B. Goodrich, in field costume, at studio in San Francisco, California. October 1896. #1:/Portraits/port3327 ID. Portraits Collection 3327 Dr. Henry William Menard, Director of the USGS. Served from 1978 to 1981. #1:/Portraits Collection/port3339 ID. Portraits Collection 3339 Frederick Leslie Ransome. 1895. #1:/Portraits Collection/port3410 ID. Portraits Collection 3410 Wallace R. Hansen, probably 1975. #1:/Portraits Collection/port3426 ID. Portraits Collection 3426 George F. Loughlin. Washington DC. 1934. #1:/Portraits/port3427 ID. Portraits Collection 3427 Unknown #1:/Portraits Collection/port3429 ID. Portraits Collection 3429 Hugh D. Miser, Washington DC. 1934 #1:/Portraits Collection/port3430 ID. Portraits Collection 3430 George R. Mansfield Washington, DC. 1934. #1:/Portraits/port3431 ID. Portraits Collection 3431 Unknown #1:/Portraits Collection/port3432 ID. Portraits Collection 3432 William Clinton Alden. Washington DC. 1934. #1:/Portraits Collection/port3434 ID. Portraits Collection 3434 Joseph Thomas. Pardee. Washington DC. 1934 #1:/Portraits/port3435 ID. Portraits Collection 3435 Unknown #1:/Portraits Collection/port3438 ID. Portraits Collection 3438 Frank Cathcart Calkins. Washington DC 1934. #1:/Portraits/port3444 ID. Portraits Collection 3444 Unknown #1:/Portraits Collection/port3445 ID. Portraits Collection 3445 W.W. Rubey Washington DC. 1934. #1:/Portraits Collection/port3447 ID. Portraits Collection 3447 W.D. Johnston, jr. Washington DC. 1934. #1:/Portraits Collection/port3456 ID. Portraits Collection 3456 George Willis Stose, Washington DC. 1934. #1:/Portraits Collection/port3457 ID. Portraits Collection 3457 Phillip Sidney Smith, chief of Alaska Geology in the 1930s, at his Washington DC, desk in 1934. #1:/Portraits Collection/port3458 ID. Portraits Collection 3458 Stephen Reid Capps. Washington DC. 1934 #1:/Portraits Collection/port3459 ID. Portraits Collection 3459 Fred H. Moffit. Washington DC. 1934. #1:/Portraits Collection/port3460 ID. Portraits Collection 3460 John Beaver Mertie jr. Washington DC. 1934 #1:/Portraits Collection/port3461 ID. Portraits Collection 3461 Rufus Harvey Sargent, topographer, Washington DC 1934. #1:/Portraits Collection/port3462 ID. Portraits Collection 3462 George Curtis Martin. Washington DC. 1934 #1:/Portraits Collection/port3495 ID. Portraits Collection 3495 Guy E Mitchell, chief Librarian, Washington DC. 1934 #1:/Portraits Collection/port3515 ID. Portraits Collection 3515 R.T. Evans. #1:/Portraits Collection/port3523 ID. Portraits Collection 3523 R.W Berry. Washington DC. 1934. #1:/Portraits Collection/port3552 ID. Portraits Collection 3552 Joseph S. Diller. July 1, 1883. #1:/Portraits Collection/port3553 ID. Portraits Collection 3553 Hoyt S.Gale #1:/Portraits Collection/port3554 ID. Portraits Collection 3554 Herbert E. Gregory 1901. #1:/Portraits/port4442 ID. Portraits Collection 4442 T. Nelson Dale. Geologist. USGS. #1:/Portraits/port4524 ID. Portraits Collection 4524 Unknown #1:/Portraits/port4935 ID. Portraits Collection 4935 Unknown #1:/Portraits/port4988 ID. Portraits Collection 4988 Unknown #1:/Portraits/port5000 ID. Portraits Collection 5000 Gordon P. Eaton, Director of the U.S. Geological Survey. [left] Bruce Babbit, Secretary of the Interior [right]. ca 1995. #1:/Portraits/hvob0183 ID. HVO B 183 Thomas A. Jaggar, Director of the Hawaiian Volcano Observatory 1912-1940, in his office. Part of figure 62.1-A in U.S. Geological Survey. Professional paper 1350. 1987. #1:/Oregon-Professional paper 3/djs00784 ID. Diller, J.S. 784 Cones on summit platform of Cascade Range. The sharp peak on the right is Union Peak; in the distance is Mount Pitt; in the foreground are Wizard Island and Crater Lake. Crater Lake National Park. Klamath County, Oregon. circa 1901. Plate 2 in U.S. Geological Survey, Professional paper 3. 1902. #1:/Arizona-Professional paper 12/rfl00056 ID. Ransome, F.L. 56 The town of Globe from the north; in the distance is the Graham or Pinaleno Range. The town lies along Pinal Creek, which is entrenched in the Gila conglomerate. Just to left of the center of the picture is the low pass whence the railroad descends to the Gila River, which flows westward past the northern end of the Pinaleno Range. Gila County, Arizona. June 1901. Plate 3-A in U.S. Geological Survey, Professional paper 12. 1903. #1:/Arizona-Professional paper 12/rfl00277 ID. Ransome, F.L. 277 View to the southeast from the north side of Webster Gulch showing topography characteristic of the Gila conglomerate. Hills in the foreground are composed of Pinal schist and dacite. On the right appear some of the northeastern spurs of the Pinal Range. In the distance, rising above the dissected deposit of the Gila conglomerate, is the Pinaleno Range. Gila County, Arizona. November 11,1901. Plate 3-B in U.S. Geological Survey, Professional paper 12. 1903. #1:/Arizona-Professional paper 12/rfl00220 ID. Ransome, F.L. 220 Monoclinal structure in the Dripping Spring range south of Pioneer; ridges are capped by quartzite of the Apache group. The other rocks represented are beds of Globe limestone and silts of diabase. Gila County, Arizona. November 22, 1901. Plate 4-A in U.S. Geological Survey, Professional paper 12. 1903. #1:/Arizona-Professional paper 12/rfl00050 ID. Ransome, F.L. 50 View down the dry bed of Pinal Creek from a point about 4 miles north of Globe. On the left are disturbed beds of Globe limestone containing Devonian fossils and unconformably overlain by Globe conglomerate. Gila County, Arizona. June 1901. Plate 4-B in U.S. Geological Survey, Professional paper 12. 1903. #1:/Arizona-Professional paper 12/rfl00291 ID. Ransome, F.L. 291 An exposure of Pioneer shale on the east side of Barnes Peak; the Barnes conglomerate is shown overlying the shale. Gila County, Arizona. January 5, 1902. Plate 5-A in U.S. Geological Survey, Professional paper 12. 1903. #1:/Arizona-Professional paper 12/rfl00290 ID. Ransome, F.L. 290 Barnes conglomerate, on the east side of Barnes Peak. Gila County, Arizona. January 5, 1902. Plate 5-B in U.S. Geological Survey, Professional paper 12. 1903. #1:/Arizona-Professional paper 12/rfl00284 ID. Ransome, F.L. 284 Probably form a panorama. Barnes Peak from Scanlan Pass. The lower slopes, in the ravine, are on granite; above this, with no topographic break, come the Scanlan conglomerate and Pioneer shale. The Barnes conglomerate and lower division of the Dripping Spring quartzite appear in the cliffs above, while the summit peak in photo 289 is composed of the upper Dripping Spring quartzite. Gila County, Arizona. January 5, 1902. Plates 6-A and B (in reverse order) in U.S. Geological Survey, Professional paper 12. 1903. #1:/Arizona-Professional paper 12/rfl00289 ID. Ransome, F.L. 289 Probably form a panorama. Barnes Peak from Scanlan Pass. The lower slopes, in the ravine, are on granite; above this, with no topographic break, come the Scanlan conglomerate and Pioneer shale. The Barnes conglomerate and lower division of the Dripping Spring quartzite appear in the cliffs above, while the summit peak in photo 289 is composed of the upper Dripping Spring quartzite. Gila County, Arizona. January 5, 1902. Plates 6-A and B (in reverse order) in U.S. Geological Survey, Professional paper 12. 1903. #1:/Arizona-Professional paper 12/rfl00206 ID. Ransome, F.L. 206 Panoramic view from top of Needle Mountain over the Pinal Creek area of Gila conglomerate; to the right of photo 206 is seen the Schultze ranch, surrounded by granitic hills, behind which rise the higher summits of the Pinal Range. In the middle-ground Bloody Tanks Wash may be traced from ranch down to Miami Flats near the left of photo 207. Surrounding these flats and stretching far to south, into the drainage basin of the Gila River, are the low sculptured spurs of Gila conglomerate, rising highest on the right against the slopes of the Pinal Range. Gila County, Arizona. December 17, 1901. Plates 6-C and D (in reverse order) in U.S. Geological Survey, Professional paper 12. 1903 #1:/Arizona-Professional paper 12/rfl00207 ID. Ransome, F.L. 207 Panoramic view from top of Needle Mountain over the Pinal Creek area of Gila conglomerate; to the right of photo 206 is seen the Schultze ranch, surrounded by granitic hills, behind which rise the higher summits of the Pinal Range. In the middle-ground Bloody Tanks Wash may be traced from ranch down to Miami Flats near the left of photo 207. Surrounding these flats and stretching far to south, into the drainage basin of the Gila River, are the low sculptured spurs of Gila conglomerate, rising highest on the right against the slopes of the Pinal Range. Gila County, Arizona. December 17, 1901. Plates 6-C and D (in reverse order) in U.S. Geological Survey, Professional paper 12. 1903 #1:/Arizona-Professional paper 12/rfl00337 ID. Ransome, F.L. 337 Block of Barnes conglomerate southeast corner of the Globe quadrangle. Gila County, Arizona. November 23, 1901. Plate 8-A in U.S. Geological Survey, Professional paper 12. 1903. #1:/Arizona-Professional paper 12/rfl00119 ID. Ransome, F.L. 119 Sheeted Schultze granite on Pinto Creek west of Schultze ranch. Gila County, Arizona. June 1901. Plate 8-B in U.S. Geological Survey, Professional paper 12. 1903 #1:/Arizona-Professional paper 12/rfl00051 ID. Ransome, F.L. 51 Globe limestone containing Devonian fossils on the road to Tonto basin about 4 miles north of Globe; the lower fossiliferous bed is at the cliff top in the middle. Gila County, Arizona. June 1901. Plate 9-A in U.S. Geological Survey, Professional paper 12. 1903. #1:/Arizona-Professional paper 12/rfl00201 ID. Ransome, F.L. 201 Whitetail formation, as exposed by the roadside near the Continental mine. Gila County, Arizona. December 17, 1901 Plate 9-B in U.S. Geological Survey, Professional paper 12. 1903. #1:/Arizona-Professional paper 12/rfl00330 ID. Ransome, F.L. 330 Whitetail formation, as exposed three-quarters of a mile northwest of Continental spring. Character of deposit 25 feet stratigraphically above photo 331. Gila County, Arizona. December 13, 1901 Plate 10-A in U.S. Geological Survey, Professional paper 12. 1903. #1:/Arizona-Professional paper 12/rfl00331 ID. Ransome, F.L. 331 Whitetail formation, as exposed three-quarters of a mile northwest of Continental spring. lower portion of exposed section. Gila County, Arizona. December 13, 1901 Plate 10-B in U.S. Geological Survey, Professional paper 12. 1903. #1:/Arizona-Professional paper 12/rfl00329 ID. Ransome, F.L. 329 Whitetail formation, as exposed three-quarters of a mile northwest of Continental spring; shows character of deposit in its upper portion. Gila County, Arizona. December 13, 1901. Plate 11-A in U.S. Geological Survey, Professional paper 12. 1903. #1:/Arizona-Professional paper 12/rfl00065 ID. Ransome, F.L. 65 Characteristic bluff of Gila conglomerate at it occurs in Copper Gulch near the town of Globe. Gila County, Arizona. June 1901. Plate 12-A in U.S. Geological Survey, Professional paper 12. 1903. #1:/Arizona-Professional paper 12/rfl00280 ID. Ransome, F.L. 280 Beds of Gila conglomerate on right, abutting against steep erosion slope of dacite on left, 1 mile east of the Sixty-six Ranch. Mineral Creek flows from right to left through a narrow gorge in the dacite. Gila County, Arizona. November 3, 1901. Plate 12-B in U.S. Geological Survey, Professional paper 12. 1903. #1:/Arizona-Professional paper 12/rfl00214 ID. Ransome, F.L. 214 Coarse breccia of dacite and schist, forming part of the Gila conglomerate near head of Webster Gulch. Plate 13-B in U.S. Geological Survey, Professional paper 12. 1903. #1:/Arizona-Professional paper 12/rfl00208 ID. Ransome, F.L. 208 Coarse granitic breccia belonging to the Gila conglomerate and forming summit of Needle Mountain. Gila County, Arizona. December 17, 1901. Plate 14-A in U.S. Geological Survey, Professional paper 12. 1903. #1:/Arizona-Professional paper 12/rfl00219 ID. Ransome, F.L. 219 Typical surface of Schultze granite, showing sheeting or parallel jointing; on trail to Pinal Ranch, near Hutton Peak. Gila County, Arizona. November 1901. Plate 14-B in U.S. Geological Survey, Professional paper 12. 1903. #1:/Arizona-Professional paper 12/rfl00213 ID. Ransome, F.L. 213 Typical weathering of diabase; on roadside near Pioneer. Gila County, Arizona. November 22, 1901. Plate 17-A in U.S. Geological Survey, Professional paper 12. 1903. #1:/Arizona-Professional paper 12/rfl00059 ID. Ransome, F.L. 59 Characteristic surface of dacite north of Old Dominion mine. Gila County, Arizona. June 1901. Plate 17-B in U.S. Geological Survey, Professional paper 12. 1903. #1:/Arizona-Professional paper 12/rfl00058 ID. Ransome, F.L. 58 Outcrop of quartzite fault breccia on Pinal Creek, about 4 miles north of Globe. Gila County, Arizona. June 1901. Plate 18-A in U.S. Geological Survey, Professional paper 12. 1903. #1:/Arizona-Professional paper 12/rfl00042 ID. Ransome, F.L. 42 Outcrop of fault breccia between limestone and diabase, on north side of Big Johnnie Gulch. Gila County, Arizona. June 1901. Plate 18-B in U.S. Geological Survey, Professional paper 12. 1903. #1:/Arizona-Professional paper 12/rfl00292 ID. Ransome, F.L. 292 Fault plane developed into a scarp by erosion. Rock on the left (hanging wall) is quartzite, that on the right (foot wall) is granite. The fault is normal. Gila County, Arizona. January 1902. Plate 19in U.S. Geological Survey, Professional paper 12. 1903. #1:/Arizona-Professional paper 12/rfl00127 ID. Ransome, F.L. 127 Typical fault in Gila conglomerate, Alice Gulch near Old Dominion mine. Gila County, Arizona. June 1901. Plate 20-A in U.S. Geological Survey, Professional paper 12. 1903. #1:/Arizona-Professional paper 12/rfl00297 ID. Ransome, F.L. 297 Typical fault in Gila conglomerate, near Black Warrior. Gila County, Arizona. June 1901. Plate 20-B in U.S. Geological Survey, Professional paper 12. 1903. #1:/Arizona-Professional paper 12/rfl00055 ID. Ransome, F.L. 55 The Old Dominion mine and smelter, from the west. Gila County, Arizona. June 1901. Plate 21in U.S. Geological Survey, Professional paper 12. 1903. #1:/Arizona-Professional paper 12/rfl00040 ID. Ransome, F.L. 40 In the open cut of the Old Dominion Mine. The wall is an oxidized mass of hematite and ore, extending irregularly into limestone on the left. Gila County, Arizona. June 1901. Plate 25-A in U.S. Geological Survey, Professional paper 12. 1903. #1:/Arizona-Professional paper 12/rfl00035 ID. Ransome, F.L. 35 The Grey Mine. View is up Copper Gulch along the course of the Old Dominion fault. The Grey shaft is in the foreground, while just beyond it is the Grey incline. Behind the latter is the Cuprite shaft and Copper Hill. Black Peak lies against the sky to the left. Gila County, Arizona. June 1901. Plate 25-B in U.S. Geological Survey, Professional paper 12. 1903. #1:/Arizona-Professional paper 12/rfl00044 ID. Ransome, F.L. 44 The Buffalo Mine from the ridge south of Alice Gulch. Gila County, Arizona. June 1901. Plate 27-A in U.S. Geological Survey, Professional paper 12. 1903. #1:/Arizona-Professional paper 12/rfl00202 ID. Ransome, F.L. 202 The Continental Mine from the south. The black lines (on published photo only) indicate approximately the outcrops of some of the principal faults. The mine buildings and the entrance to the main tunnel are behind the diabase spur skirted by the road in the middle- ground of the left side of the view. The ore occurs with the granitic mass which outcrops prominently on the sky line. The Ninety-Six shaft is in the little ravine where the two faults bounding the smaller mass of granite meet at an acute angle. Gila County, Arizona. December 17, 1901. Plate 27-B in U.S. Geological Survey, Professional paper 12. 1903. #1:/Kentucky-Professional paper 36/swst0020 ID. Smith, W.S.T. 20 Gravity fluorspar washer at Tabb mine. Crittenden County, Kentucky. 1902. Plate 9-A in U.S. Geological Survey. Professional paper 36. 1905. #1:/Kentucky-Professional paper 36/swst0018 ID. Smith, W.S.T. 18 Hodge mine, general views, showing location of washer, southwest of Craynesville. Crittenden County, Kentucky 1902. Plate 10-A in U.S. Geological Survey. Professional paper 36. 1905. #1:/Kentucky-Professional paper 36/swst0017 ID. Smith, W.S.T. 17 Log washer at Hodge mine. Crittenden County, Kentucky 1902. Plate 10-B in U.S. Geological Survey. Professional paper 36. 1905. #1:/Kentucky-Professional paper 36/swst0016 ID. Smith, W.S.T. 16 Outcrop of sheeted Chester quartzite at Benard mine, south of Salem. Livingston County, Kentucky. 1902. Plate 12-A in U.S. Geological Survey. Professional paper 36. 1905. #1:/Kentucky-Professional paper 36/swst0015 ID. Smith, W.S.T. 15 Outcrop of quartzite at Mayes and Wilson prospect, close to Columbia fault, near Crittenden Springs. Crittenden County, Kentucky. 1902. Plate 12-B in U.S. Geological Survey. Professional paper 36. 1905. #1:/South Dakota-Professional paper 32/dnh00271 ID. Darton, N.H. 271 Typical deep well rig at deep boring, Rosebud Indian Reservation, 25 miles northeast of Agency. Todd County, South Dakota. Circa 1900. Plate 61-B in U.S. Geological Survey. Professional paper 32. 1905. #1:/Nebraska-Professional Paper 32/dnh00295 ID. Darton, N.H. 295 Dakota sandstone on bluffs on west side of Platte River, 1 mile below Ashland. Massive porous sandstone with coarse and fine beds and cross bedding; carboniferous limestone outcropping in weeds at base. Saunders County, Nebraska. Circa 1900. Plate 40-A in U.S. Geological Survey. Professional paper 32. 1905. #1:/Nebraska-Professional Paper 32/dnh00303 ID. Darton, N.H. 303 Ogalalla conglomerate on Brule clay, at mouth of Ash Creek. Deuel County, Nebraska. Circa 1900 Plate 55 in U.S. Geological Survey. Professional paper 32. 1905 #1:/South Dakota-Professional Paper 32/dnh00256 ID. Darton, N.H. 256 Deadwood sandstone lying on Algonkian schists in Deadwood. Lawrence County, South Dakota. Circa 1900. Plate 13-B in U.S. Geological Survey. Professional paper 32. 1905, plate 5 in U.S. Geological Survey. Professional paper 65. 1909. #1:/South Dakota-Professional Paper 32/dnh00257 ID. Darton, N.H. 257 Deadwood formation in northern part of Deadwood, view showing thick mass of regularly bedded sandstone in middle of formation, looking northeast. Lawrence County, South Dakota. Circa 1900. Plate 13-A in U.S. Geological Survey. Professional paper 32. 1905, plate 14 in U.S. Geological Survey. Folio 219. 1925. #1:/Nebraska-Professional Paper 32/dnh00348 ID. Darton, N.H. 348 Scotts Bluff from the north side of North Platte River. View showing terrace at foot of bluffs, into which the badlands are cut, and the broad river bottom, Dome Rock on the left, Arikaree and Gering formations on Brule clay; A typical butte of Tertiary formations. Scotts Bluff County, Nebraska circa 1900, plate 3 in U.S. Geological Survey. Professional paper 17. 1903, plate 9 in U.S. Geological Survey. Professional paper 32. 1905. (this is an updated version -jkm) #1:/Scotts Bluff National Monument/dnh00349 ID. Darton, N.H. 349 Scotts Bluff National Monument, Nebraska. Scotts Bluff to Dome Rock, viewed from the east near Gering. 1897. #1:/Nebraska-Professional Paper 32/dnh00350 ID. Darton, N.H. 350 North face of Scotts Bluff, near Platte River, west of Gering. Upper cliffs of Arikaree formation, lower slopes and badlands of Brule clay; typical erosion forms of Brule clay in Scotts Bluff County, Nebraska. Circa 1900. Plate 29 U.S. Geological Survey. Professional paper 17 1902, plate 47 in U.S. Geological Survey. Professional paper 32. 1905. (this an updated version -jkm) #1:/South Dakota-Professional Paper 32/dnh00429 ID. Darton, N.H. 429 Gateway to Garden of the Gods, west of Colorado Springs. El Paso County, Colorado. Circa 1900. Plate 1, with Ives three color process, in U.S. Geological Survey. Professional paper 32. 1905. #1:/Colorado-Professional Paper 32/dnh00430 ID. Darton, N.H. 430 Cathedral spires, Garden of the Gods, vertical strata of lower Wyoming red grits, looking north. El Paso County, Colorado Circa 1900. Plate 36 in U.S. Geological Survey. Professional paper 32. 1905, plate 11 in U.S. Geological Survey. Folio 203. 1916. #1:/Nebraska-Professional Paper 32/dnh00437 ID. Darton, N.H. 437 Pine Ridge escarpment at the Nebraska-Wyoming state line, high cliffs of Arikaree sandstone; lowlands of Brule clay, looking west. Sioux County, Nebraska. Circa 1900. Plate 4-B in U.S. Geological Survey. Professional paper 32. 1905. #1:/Nebraska-Professional Paper 32/dnh00445 ID. Darton, N.H. 445 North Platte River at the Nebraska-Wyoming state line, view showing shrunken midsummer condition. Looking east. Scotts Bluff County, Nebraska. Circa 1900. Plate 8-B in U.S. Geological Survey. Professional paper 32. 1905. #1:/South Dakota-Professional Paper 32/dnh00476 ID. Darton, N.H. 476 Lakota sandstone lying unconformably on Unkpapa sandstone in north wall of Sheps canyon, south of Hot Springs, view shows channeling at contact. Fall River County, South Dakota. Circa 1900. Plate 19-A in U.S. Geological Survey. Professional paper 32. 1905, figure 7 in U.S. Geological Survey. Folio 85. 1902. #1:/South Dakota-Professional Paper 32/dnh00473 ID. Darton, N.H. 473 Sundance formation lying unconformably on Spearfish red shales, 7 miles south of Hot Springs, Fall River County, South Dakota. Circa 1900. Plate 19-B in U.S. Geological Survey. Professional paper 32. 1905, figure 8 in U.S. Geological Survey. Folio 85. 1902. #1:/South Dakota-Professional Paper 32/dnh00489 ID. Darton, N.H. 489 Dakota sandstone, Fuson formation, Minnewaste limestone and Lakota formation, near Evans quarry, south wall of Fall River canyon, 4 miles below Hot Springs. Capping rock of Dakota sandstone in typical massive beds, lower outcrops are Lakota sandstone, showing nearly entire thickness of that formation. Fall River County, South Dakota. Circa 1900. Plate 20 in U.S. Geological Survey. Professional paper 32. 1905, figure 4 in U.S. Geological Survey. Folio 85. 1902. #1:/Wyoming-Professional Paper 32/dnh00581 ID. Darton, N.H. 581 Cheyenne river at mouth of Lance creek, a typical stream of the arid regions, nearly dry in midsummer, view upstream. Niobrara County, Wyoming. Circa 1900. Plate 8-A in U.S. Geological Survey. Professional paper 32. 1905. #1:/Wyoming-Professional Paper 32/dnh00589 ID. Darton, N.H. 589 Western slope of Black Hills on east side of Stockade Beaver valley, southeast of Newcastle, steep-dipping beds from Minnelusa to Minnekahta limestone, the latter spreading out in a characteristic plateau at the foot of the slope, looking southeast. Weston County, Wyoming. Circa 1900. Plate 15 in U.S. Geological Survey. Professional paper 32. 1905, figure 8 in U.S. Geological Survey. Folio 107, 1904. #1:/Wyoming-Professional Paper 32/dnh00595 ID. Darton, N.H. 595 Concretions in Laramie sandstone southwest of Newcastle, prominence due to erosion. Weston County, Wyoming. Circa 1900. Plate 18-B in U.S. Geological Survey. Professional paper 32. 1905, figure 18 in U.S. Geological Survey. Folio 107. 1904. #1:/South Dakota-Professional Paper 32/dnh00614 ID. Darton, N.H. 614 Limestones of White River group in Red valley, 6 miles northwest of Hermosa, Custer County, South Dakota. Circa 1900. Plate 25-A in U.S. Geological Survey. Professional paper 32. 1905, plate 26 in U.S. Geological Survey. Folio 219. 1925. #1:/South Dakota-Professional Paper 32/dnh00634 ID. Darton, N.H. 634 Deadwood sandstone lying on Algonkian schists, on Squaw Creek below Otis, typical flat bottomed valley of Black Hill parks; sandstone about 30 feet thick, marked by line of cliffs to right, looking north. Custer County, South Dakota. Circa 1900. Plate 14 in U.S. Geological Survey. Professional paper 32. 1905. #1:/South Dakota-Professional paper 32/dnh00642 ID. Darton, N.H. 642 Big Badlands, east of Flour Trail, characteristic rounded forms of Chadron clays, overlain by Brule clay (Oredon beds) in distance, remnants of plateau out of which badlands were carved in foreground and outlying buttes, looking east. Washington County. South Dakota. Circa 1900. Plate 45-A in U.S. Geological Survey. Professional paper 32. 1905. #1:/Wyoming-Professional Paper 32/dnh00731 ID. Darton, N.H. 731 Devils Tower, on west bank of Belle Fourche River, south of Hulett. Crook Wyoming. Circa 1900. Plate 17, as Ives Three Color Process, in U.S. Geological Survey. Professional paper 32. 1905, figure 1 in U.S. Geological Survey. Folio 150. 1907. Yes, this is a newer version of this caption. jkm #1:/Wyoming-Professional Paper 32/dnh00752 ID. Darton, N.H. 752 Typical canyon walls of Minnekahta limestone lying on slope of Opeche red beds, Gillette canyon southeast of Newcastle, view showing massive appearance of thin bedded rock. Weston County, Wyoming. Circa 1900. Plate 16-A in U.S. Geological Survey. Professional paper 32. 1905. plate 18 in U.S. Geological Survey. Folio 219. 1925. #1:/Wyoming-Professional Paper 32/dnh00755 ID. Darton, N.H. 755 Typical cliffs of Dakota sandstone, northeast side of Salt Creek, 2 miles south of Newcastle, view showing massive bedding and large columnar structure, looking southeast. Weston County, Wyoming. Circa 1900. Plate 21 in U.S. Geological Survey. Professional paper 32. 1905, figure 13 in U.S. Geological Survey. Folio 107. 1904. #1:/South Dakota-Professional paper 32/dnh00758 ID. Darton, N.H. 758 Water tank at Bellefourche, filled by direct flow of 500-foot artesian well. Butte County, South Dakota. Circa 1900. Plate 61-A in U.S. Geological Survey. Professional paper 32. 1905. #1:/South Dakota-Professional Paper 32/dnh00767 ID. Darton, N.H. 767 Mesas capped by greenhorn limestone south of Edgemont, slopes of Graneros shale, looking east. Fall River County, South Dakota. Circa 1900. Plate 23-B in U.S. Geological Survey. Professional paper 32. 1905 #1:/South Dakota-Professional Paper 32/dnh00768 ID. Darton, N.H. 768 Greenhorn limestone lying on Graneros shales, Cottonwood Creek, southwest of Edgemont, view showing characteristic thin bedding and shale intercalations in Greenhorn limestone and the abrupt change from Graneros shale. Fall River County, South Dakota. Circa 1900. Plate 22 in U.S. Geological Survey. Professional paper 32. 1905, figure 12 in U.S. Geological Survey. Folio 108. 1904. #1:/Wyoming-Professional Paper 32/dnh00770 ID. Darton, N.H. 770 West slope of Stockade Beaver valley, east of Newcastle. View showing Spearfish red beds below with gypsum top, middle slopes of Sundance shales and massive sandstone, upper slopes of Sundance and Morrison shales, with Lakota outlier on knob. Weston County, Wyoming. Circa 1900. Plate 18-B in U.S. Geological Survey. Professional paper 32. 1905, figure 9 in U.S. Geological Survey. Folio 107. 1904 #1:/Wyoming-Professional Paper 32/dnh00775 ID. Darton, N.H. 775 Monoclinal ridges of greenhorn limestone and sandstone in Carlile formation, at of Clifton Reservoir south of Newcastle. Dakota hogback in distance to right, looking north. Weston County, Wyoming. Circa 1900. Plate 23-A in U.S. Geological Survey. Professional paper 32. 1905. #1:/South Dakota-Professional Paper 32/dnh00780 ID. Darton, N.H. 780 Conglomerate in Chadron formation on east slope of Black Hills, south of Fairburn. Custer County, South Dakota. Circa 1900. Plate 25-B in U.S. Geological Survey. Professional paper 32. 1905, plate 25 in U.S. Geological Survey. Folio 219. 1925. #1:/Colorado-Professional Paper 32/dnh00779 ID. Darton, N.H. 779 Gateway to Perry Park, nearly vertical lower Wyoming red grits, cliffs are of Dakota sandstone surmounting slopes of Morrison formation in distance, looking east. Douglas County, Colorado Circa 1900. Plate 34-B in U.S. Geological Survey. Professional paper 32. 1905, plate 15 in U.S. Geological Survey. Folio 198. 1915. #1:/Wyoming-Professional Paper 32/dnh00787 ID. Darton, N.H. 787 Butte capped by bed of sandstone in Arikaree formation, northeast of Boxelder Springs, near Hartville, Platte County, Wyoming. Circa 1900. Plate 51 in U.S. Geological Survey. Professional paper 32. 1905, figure 1 in U.S. Geological Survey. Folio 91. 1903. #1:/South Dakota-Professional paper 32/dnh00808 ID. Darton, N.H. 808 Head of Cottonwood Draw, in center of Big Badlands. Protoceras sandstone underlying Leptauchenia clays, showing alternations of sandstones and clays, extreme development of badlands and typical nodule bearing clays in upper clay series. Washington County, South Dakota. Circa 1900. Plate 46-A in U.S. Geological Survey. Professional paper 32. 1905. #1:/Wyoming-Professional Paper 32/dnh00825 ID. Darton, N.H. 825 Conglomerate in lower portion of Laramie formation north side of Rock Creek, northwest of Buffalo. Conglomerate, largely Deadwood, Bighorn and Littlehorn materials, limestone and granite in Bighorn Mountains in distance, looking west. Johnson County, Wyoming. 1901. Plate 30 in U.S. Geological Survey. Professional paper 32. 1905, plate 20 in U.S. Geological Survey. Professional paper 51. 1906 #1:/Wyoming-Professional Paper 32/dnh00832 ID. Darton, N.H. 832 Canyon of Tongue River, Bighorn Mountains. Showing Littlehorn limestone with characteristic erosion forms and canyon walls, looking west, upstream. Sheridan County, Wyoming. Circa 1900. Plate 27 in U.S. Geological Survey. Professional paper 32. 1905, plate 14 in U.S. Geological Survey Professional paper 51, 1906. #1:/Wyoming-Professional Paper 32/dnh00840 ID. Darton, N.H. 840 Form a panorama of east slope of Bighorn Mountains, Wolf Creek, west of Sheridan. Showing granite in gap and Deadwood to Sundance formations. Tensleep sandstone on slope; Chugwater red beds in valley; cliffs to right capped by Sundance beds (over tents). Sheridan County, Wyoming. Circa 1900. Plate 28-B (as composite) in U.S. Geological Survey. Professional paper 32. 1905. #1:/Wyoming-Professional Paper 32/dnh00841 ID. Darton, N.H. 841 East slope of Bighorn Mountains on north side of Wolf Creek, northwest of Sheridan, hogback of Cloverly sandstone; slopes of Morrison formation to left. Sheridan County, Wyoming. Circa 1900. Plate 29-A in U.S. Geological Survey. Professional paper 32. 1905, plate 18-A in U.S. Geological Survey. Professional paper 51. 1906. #1:/Wyoming-Professional Paper 32/dnh00842 ID. Darton, N.H. 842 Form a panorama of east slope of Bighorn Mountains, Wolf Creek, west of Sheridan. Showing granite in gap and Deadwood to Sundance formations. Tensleep sandstone on slope; Chugwater red beds in valley; cliffs to right capped by Sundance beds (over tents). Sheridan County, Wyoming. Circa 1900. Plate 28-B (as composite) in U.S. Geological Survey. Professional paper 32. 1905. #1:/Wyoming-Professional Paper 32/dnh00846 ID. Darton, N.H. 846 Typical cross section view of east slope of front range of Bighorn Mountains, west of Sheridan. Granite to left, overlain by Deadwood beds; knob capped by Bighorn limestone, plains of Laramie formation in distance to right. Sheridan County, Wyoming. Circa 1900. Plate 28-A in U.S. Geological Survey. Professional paper 32. 1905, figure 7 in U.S. Geological Survey Folio 141. 1906. #1:/Wyoming-Professional Paper 32/dnh00847 ID. Darton, N.H. 847 East slope of Bighorn Mountains, at Rock Creek, northwest of Buffalo, limestone layer in Red Beds; dips nearly vertical; Tensleep sandstone to left; granite in distance, brought up by cross fault. Johnson County, Wyoming. 1901. Plate 29-B in U.S. Geological Survey. Professional paper 32. 1905, plate 18-B in U.S. Geological Survey. Professional paper 51. 1906. #1:/Wyoming-Professional Paper 32/dnh00922 ID. Darton, N.H. 922 East slope of Bighorn Mountains, from across Wolf Creek canyon. Granite on left, overlain by Deadwood shales and sandstone, Bighorn limestone (the most prominent ledge in distance) and Littlehorn limestone; beds all steeply arched to right of center in distance. Sheridan County, Wyoming. July 1902. Plate 26-B in U.S. Geological Survey. Professional paper 32. 1905, plate 9-A in U.S. Geological Survey. Professional paper 51. 1906, figure 9 in U.S. Geological Survey. Folio 141. 1906. #1:/Wyoming-Professional Paper 32/dnh00925 ID. Darton, N.H. 925 Cloud Peak, the culmination of the Bighorn Mountains, view showing typical glacial erosion in granite, Cloud Peak and top of glacier slightly to right of center distance, looking west. Johnson County, Wyoming. August 1902 Plate 26-A in U.S. Geological Survey. Professional paper 32. 1905, plate 32 in U.S. Geological Survey Professional paper 51. 1906. #1:/Wyoming-Professional Paper 32/dnh0934c ID. Darton, N.H. 934c Natural bridge in Tensleep formation near La Prele Creek, southwest of Douglas, Converse County, Wyoming. Circa 1900. Adequate substitute for Plate 31, in U.S. Geological Survey. Professional paper 32. 1905. #1:/Wyoming-Professional Paper 32/dnh00936 ID. Darton, N.H. 936 East end of Casper Mountain, southeast of Casper, typical slopes of Tensleep sandstone to left, Red Beds come in to left over house, great fault above corral, where Pierre shale abuts against Tensleep sandstone, looking west. Natrona County, Wyoming. Circa 1900. Plate 32-A in U.S. Geological Survey. Professional paper 32. 1905. #1:/Wyoming-Professional Paper 32/dnh00937 ID. Darton, N.H. 937 Valley of Muddy Creek, at east end of Casper Mountain, southeast of Casper, slopes of Tensleep sandstone on right, hogback of Dakota and associated sandstones on left. looking south, up creek. Natrona County, Wyoming. Circa 1900. Plate 32-B in U.S. Geological Survey. Professional paper 32. 1905. #1:/Colorado-Professional Paper 32/dnh00955 ID. Darton, N.H. 955 Two Buttes, southwestern Prowers County, Exeter sandstone, uplifted by laccolith; adjoining plain covered by later Tertiary deposits, looking south. Colorado. Circa 1900. Plate 37-A in U.S. Geological Survey. Professional paper 32. 1905. Plate 21-A in U.S. Geological Survey. Professional paper 52. 1906. (Yes, this is a revised caption. jm 6-26- 02) #1:/South Dakota-Professional paper 32/dnh01255 ID. Darton, N.H. 1255 Artesian well at Woonsocket, well throws a 3-inch stream to height of 97 feet. Sanborn County, South Dakota, Circa 1900. Plate 60-B in U.S. Geological Survey. Professional paper 32. 1905, plate 78, U.S. Geological Survey 17th Annual report, 1896, plate 15, in U.S. Geological Survey. Water-supply paper 227. 1909. #1:/Colorado-Professional Paper 32/dnh01505 ID. Darton, N.H. 1505 Arikaree sandstone on Brule clay, in Pawnee Buttes, strong unconformity due to erosion; typical beds of concretions in Arikaree formation. Weld County, Colorado Circa 1900. Plate 54-A in U.S. Geological Survey. Professional paper 32. 1905. #1:/Nebraska-Professional Paper 32/dnh01257 ID. Darton, N.H. 1257 Artesian well at Lynch, flows more than 3,000 gallons per minute. Boyd County, Nebraska. Circa 1900. Plate 67-A in U.S. Geological Survey. Professional paper 32. 1905. #1:/Arizona-Professional paper 43/lin00307 ID. Lindgren, W. 307 Bluffs of Gila conglomerate on west side of San Francisco river 3 miles below Clifton, the bluffs are 300 to 400 feet high. Greenlee County, Arizona. Circa 1901, plate 3-B in U.S. Geological Survey. Professional paper 43. 1905. #1:/Arizona-Professional paper 43/lin00290 ID. Lindgren, W. 290 Foothills between Clifton and Morenci, wagon road ascends smooth ridge of Gila conglomerate, west of Chase Creek. Cambrian quartzite (Coronado formation) capped by Ordovician limestone (Longfellow formation) to right. Greenlee County, Arizona. Circa 1901, plate 4-A in U.S. Geological Survey. Professional paper 43. 1905. #1:/Arizona-Professional paper 43/lin00287 ID. Lindgren, W. 287 Mouth of Morenci Canyon, looking up toward Morenci, Cambrian quartzite to the left, Ordovician limestone to the right, Copper Mountain fault, separating the two, follows bottom of canyon. Greenlee County, Arizona. Circa 1901, plate 5-A in U.S. Geological Survey. Professional paper 43. 1905. #1:/Arizona-Professional paper 43/lin00291 ID. Lindgren, W. 291 Chase Creek Canyon, looking north at point where Clifton-Morenci road turns up over the Gravel Hills. Granite and Cambrian quartzite separated by fault. Near top of ridge quartzite rests normally on granite, high granite mountains (Markeen, Copper King) in background. Greenlee County, Arizona. Circa 1901, plate 5-B in U.S. Geological Survey. Professional paper 43. 1905. #1:/Arizona-Professional paper 43/lin00288 ID. Lindgren, W. 288 View up Chase Creek from point on road between Clifton and Morenci, cliff of Coronado quartzite on left, capped by Longfellow limestone. Greenlee County, Arizona. Circa 1901, plate 6-A in U.S. Geological Survey. Professional paper 43. 1905. #1:/Arizona-Professional paper 43/lin00283 ID. Lindgren, W. 283 Cliffs on west side of Morenci Canyon, showing Coronado quartzite. Greenlee County, Arizona. Circa 1901, plate 6-B in U.S. Geological Survey. Professional paper 43. 1905. #1:/Arizona-Professional paper 43/lin00274 ID. Lindgren, W. 274 View up toward the Metcalf mines from Metcalf. Shannon Mountain to the left, granite porphyry. Greenlee County, Arizona. Circa 1901, plate 20-A in U.S. Geological Survey. Professional paper 43. 1905. #1:/Arizona-Professional paper 43/lin00271 ID. Lindgren, W. 271 View up toward Shannon Mountain from Metcalf. Metcalf inclines and open cuts to the right, Shannon tunnel in center background, foreground occupied by granite porphyry. Darker background contact metamorphosed limestones and shales. Greenlee County, Arizona. Circa 1901, plate 20-B in U.S. Geological Survey. Professional paper 43. 1905. #1:/Arizona-Professional paper 43/lin00260 ID. Lindgren, W. 260 King Gulch, near Metcalf, looking down toward Chase Creek. Porphyry occupies the foreground and most of the ridges in the background. Greenlee County, Arizona. Circa 1901, plate 21-A in U.S. Geological Survey. Professional paper 43. 1905. #1:/Arizona-Professional paper 43/lin00265 ID. Lindgren, W. 265 Open cut on the first level of Metcalf mines, country rock granite porphyry. Greenlee County, Arizona. Circa 1901, plate 21-B in U.S. Geological Survey. Professional paper 43. 1905. #1:/Utah-Professional paper 38/kei00161 ID. Keith, A. 161 Head of Bingham Canyon, 1 mile southwest of Old Jordan, looking northeast. Salt Lake County, Utah. 1900, plate 3 in U.S. Geological Survey. Professional paper 38. 1905. #1:/Utah-Professional paper 38/kei00163 ID. Keith, A. 163 Head of Carr Fork, Bingham Canyon, from West Mountain gap, 1 mile southwest of Old Jordan, looking northeast. Salt Lake County, Utah. 1900, plate 4 in U.S. Geological Survey. Professional paper 38. 1905. #1:/Utah-Professional paper 38/kei00165 ID. Keith, A. 165 Ledges of Jordan limestone at head of Butterfield Canyon, looking southwest from West Mountain gap. Salt Lake County, Utah. 1900, plate 6 in U.S. Geological Survey. Professional paper 38. 1905. #1:/Utah-Professional paper 38/kei00166 ID. Keith, A. 166 Auriferous Gravels in upper Bear Gulch. View is west. Tunnels in foreground are driver on west rim for pay dirt at base of gravels. Salt Lake County, Utah. 1900, plate 48 in U.S. Geological Survey. Professional paper 38. 1905. #1:/Utah-Professional paper 38/kei00168 ID. Keith, A. 168 Chert ledges in Commercial limestone, one-third mile N. 55 degrees E of Telegraph mine, looking northeast. Salt Lake County, Utah. 1900, plate 8 in U.S. Geological Survey. Professional paper 38. 1905. #1:/Utah-Professional paper 38/kei00169 ID. Keith, A. 169 Ferruginous brecciated quartzite outcrop, one-fourth mile west of St. James mine, looking north. Salt Lake County, Utah. 1900, plate 13 in U.S. Geological Survey. Professional paper 38. 1905. #1:/Utah-Professional paper 38/bjm00001 ID. Boutwell, J.M. 1 Metamorphosed Jordan limestone northeast wall of Galena fissure, the alternate lighter and darker bands are marble and blue limestone beds, view in northwest along strike. Salt Lake County, Utah. 1900, plate 28-B in U.S. Geological Survey. Professional paper 38. 1905. #1:/Utah-Professional paper 38/bjm00002 ID. Boutwell, J.M. 2 Outcrop of galena fissure in metamorphosed Jordan limestone, view to northeast. Salt Lake County, Utah. 1900, plate 28-A in U.S. Geological Survey. Professional paper 38. 1905. #1:/Utah-Professional paper 38/bjm00003 ID. Boutwell, J.M. 3 Bedded ferruginous conglomerate along Bingham Creek one-half mile below upper Bingham. Salt Lake County, Utah. 1900, plate 12 in U.S. Geological Survey. Professional paper 38. 1905. #1:/Utah-Professional paper 38/bjm00004 ID. Boutwell, J.M. 4 Cliffs of nearly vertical Bingham quartzite with talus slope, south side of Bingham Canyon, opposite mouth of Dry Fork. Salt Lake County, Utah. 1900, plate 5 in U.S. Geological Survey. Professional paper 38. 1905. #1:/Utah-Professional paper 38/bjm00005 ID. Boutwell, J.M. 5 Bedded andesite breccia, one-fourth mile east of Lead Mine, looking south. Salt Lake County, Utah. 1900, plate 11 in U.S. Geological Survey. Professional paper 38. 1905. #1:/Utah-Professional paper 38/bjm00011 ID. Boutwell, J.M. 11 "Roll" fault, no. 1 level, Old Jordan mine, looking northeast, the footwall quartzite (right) is faulted up into contact with black copper sulphide ore (left) Salt Lake County, Utah. 1900, with graphics, plate 21-B in U.S. Geological Survey. Professional paper 38. 1905. #1:/Utah-Professional paper 38/bjm00012 ID. Boutwell, J.M. 12 Basal contact of monzonite sill with Bingham quartzite, Utah level, Old Jordan mine. Salt Lake County, Utah. 1900, plate 22-A in U.S. Geological Survey. Professional paper 38. 1905. #1:/Utah-Professional paper 38/bjm00013 ID. Boutwell, J.M. 13 Horse of Bingham quartzite in monzonite dike sill, Utah level, Old Jordan mine. Salt Lake County, Utah. 1900, plate 22-B in U.S. Geological Survey. Professional paper 38. 1905. #1:/Utah-Professional paper 38/bjm00014 ID. Boutwell, J.M. 14 Early stage in replacement of limestone by copper ore, banded partially marmorized limestone cut by strike fissures, Highland Boy mine no. 6 level, looking west. In the walls of these fissures characteristic contact metamorphic minerals appear, and chalcopyrite and specularite replace metamorphic limestone. Salt Lake County, Utah. 1900, plate 31-A in U.S. Geological Survey. Professional paper 38. 1905. #1:/Utah-Professional paper 38/bjm00017 ID. Boutwell, J.M. 17 Later stage in replacement of limestone by copper ore, sulphide copper ore composed of chalcocite, chalcopyrite, and pyrite replacing marble along strike fissures, Highland Boy mine, no. 5-1/2 level, looking west. Salt Lake County, Utah. 1900, plate 31-B in U.S. Geological Survey. Professional paper 38. 1905. #1:/Utah-Professional paper 38/bjm00019 ID. Boutwell, J.M. 19 Normal barren contact between Highland Boy limestone and footwall quartzite, no. 7 level Highland Boy mine, looking west. Salt Lake County, Utah. 1900, plate 21-A in U.S. Geological Survey. Professional paper 38. 1905. #1:/Utah-Professional paper 38/bjm00020 ID. Boutwell, J.M. 20 Complete replacement of limestone by copper ore. Massively bedded cupriferous pyrite, with quartz indicating original bedding, Highland Boy mine, new stope. Salt Lake County, Utah. 1900, plate 32-B in U.S. Geological Survey. Professional paper 38. 1905. #1:/Utah-Professional paper 38/bjm00022 ID. Boutwell, J.M. 22 Advanced replacement of limestone by copper ore, the dark bands are chalcocite, chalcopyrite and pyrite, the light ones are granular quartz and cherty siliceous limestone. Retention of bedding structure indicates replacement; Telegraph mine, Grecian Bend level. Salt Lake County, Utah. 1900, plate 32-A in U.S. Geological Survey. Professional paper 38. 1905. #1:/Utah-Professional paper 38/bjm00035 ID. Boutwell, J.M. 35 Stalactite of pisanite, Old Jordan Mine. Salt Lake County, Utah. 1900, black and white published in color as plate 20 in U.S. Geological Survey. Professional paper 38. 1905. #1:/Utah-Professional paper 38/bjm00036 ID. Boutwell, J.M. 36 Pay streak of rich argentiferous lead ore in silver shield lode, showing structure and mineralogical association. Salt Lake County, Utah. 1900, in black and white as color with graph as plate 24 in U.S. Geological Survey. Professional paper 38. 1905. #1:/Utah-Professional paper 38/bjm00039 ID. Boutwell, J.M. 39 Sulphide enrichment. A central band of cupriferous pyrite (P) containg a trace of tellurium and low values in copper, gold, and silver, is inclosed by bands of chalcocite (C) and tenorite, forming the outer portion of the vein containing considerable tellurium, and high values in copper, gold, and silver. Speciment is from Commerical mine. Natural size. Speciment 220. Salt Lake county, Utah, 1900, in false color as plate 38c in U.S. Geological Survey. Professional paper 38. 1905. #1:/Utah-Professional paper 38/bjm00101 ID. Boutwell, J.M. 101 Dissection of bottom gravels by Bingham Creek in lower Bingham Canyon. View is northest. Salt Lake County, Utah, 1900. Published in black and white as plate 47a in U.S. Geological Survey. Professional paper 38. 1905. #1:/Utah-Professional paper 38/bjm00113 ID. Boutwell, J.M. 113 Recent Dissection of Bonneville Bench by Tooele Creek on west slop of Oquirrh range. View is northward along west slopes of Oquirrhs. In the middle background Stansbury Island appears above Great Salt Lake. Salt Lake County, Utah, 1900. Published in black and white as plate 47b in U.S. Geological Survey. Professional paper 38. 1905. #1:/Utah-Professional paper 38/bjm00119 ID. Boutwell, J.M. 119 Photomicrograph of fresh and decomposed mineralized monzonite, typical monzonite of Bingham, from Tribune tunnel, Telegraph mine. Fine grained granular to subporphyritic structure. Augite (lower right), biotite (top center), and orthoclase form chief constituents. The enclosing areas are almost entirely feldspathic, including both orthoclase and plagioclase, a little garnet. Augite is uralitized. The small black areas are nearly all magnetite, but a few are grains of pyrite. Salt Lake County, Utah. 1900, with graphics added, plate 26-A, in U.S. Geological Survey. Professional paper 38. 1905. #1:/Utah-Professional paper 38/bjm00120 ID. Boutwell, J.M. 120 Photomicrograph of fresh and decomposed mineralized monzonite, development of pyrite in altered monzonite, from Eldorado shaft, Boston Consolidated group. Magnetite and original biotite are absent, pyrite appears embedded in secondary quartz associated with flocculent aggregates of biotite, probably secondary. Feldspathic constituents have gone over to sercicite. Salt Lake County, Utah. 1900, plate 26-B in U.S. Geological Survey. Professional paper 38. 1905. #1:/Utah-Professional paper 38/bjm00121 ID. Boutwell, J.M. 121 Photomicrographs of chalcopyrite developing in altered monzonite, chalcopyrite developing in secondary quartz, from dump of Eldorado shaft, Boston Consolidated group. Magnetite and original biotite individuals have disappeared. Chalcopyrite has developed in secondary quartz. Feldspathic groundmass has altered to sercicite. Salt Lake County, Utah. 1900, plate 27-A in U.S. Geological Survey. Professional paper 38. 1905. #1:/Utah-Professional paper 38/bjm00122 ID. Boutwell, J.M. 122 Photomicrographs of chalcopyrite developing in altered monzonite, chalcopyrite developing in biotite, from dump of Eldorado shaft, Boston Consolidated group. Original constituents and structure not visible, irregular masses and chains of chalcopyrite are embedded in flaky aggregates of dark brown mica probably secondary biotite, and intergrown with secondary granular quartz. Salt Lake County, Utah. 1900, plate 27-B in U.S. Geological Survey. Professional paper 38. 1905. #1:/Utah-Professional paper 38/bjm00123 ID. Boutwell, J.M. 123 Photomicrograph of fresh and metamorphosed limestone, fresh blue limestone, south slope of West Mountain, 700 feet west of intrusive. A normal impure calcareous matrix includes fossils and veinlets of calcite. Salt Lake County, Utah. 1900, plate 29-A in U.S. Geological Survey. Professional paper 38. 1905. #1:/Utah-Professional paper 38/bjm00124 ID. Boutwell, J.M. 124 Photomicrograph of fresh and metamorphosed limestone, fresh blue limestone, metamorphosed limestone, white marble, no. 7 tunnel Highland Boy mine, adjacent to intrusive, showing rock altered almost entirely to coarse granular calcite. Salt Lake County, Utah. 1900, plate 29-B in U.S. Geological Survey. Professional paper 38. 1905. #1:/Utah-Professional paper 38/bjm00125 ID. Boutwell, J.M. 125 Photomicrographs showing replacement of metamorphosed limestone by chalcopyrite and pyrite. Chalcopyrite developing in marmorized silicified limestone. From no. 1 ore body, no. 6 level, Highland Boy mine. Chalcopyrite invading limestone metamorphosed to siliceous marble made up of granular calcite and quartz. Chalcopyrite replaces calcite and quartz. Salt Lake County, Utah. 1900, plate 34-A U.S. Geological Survey. Professional paper 38. 1905. #1:/Utah-Professional paper 38/bjm00126 ID. Boutwell, J.M. 126 Photomicrographs showing replacement of metamorphosed limestone by chalcopyrite and pyrite. Chalcopyrite and pyrite replacing siliceous limestone. From no. 1 ore body, no. 6 level, Highland Boy mine. Irregular intergrowth of chalcopyrite and pyrite. Salt Lake County, Utah. 1900, plate 34-B in U.S. Geological Survey. Professional paper 38. 1905. #1:/Utah-Professional paper 38/bjm00127 ID. Boutwell, J.M. 127 Photomicrographs showing replacement of metamorphosed and a normal calcareous shale. Intergrowth of chalcopyrite and pyrite replacing quartz, from no. 4 level Highland Boy mine. The chalcopyrite and pyrite encircle and replace the quartz of an entirely silicified limestone. This section from a specimen from an upper level shows evidences of superficial alteration not apparent in the reproduction. The margins of the sulphides are tarnished, simulating peacock ore. Salt Lake County, Utah. 1900, plate 35-A in U.S. Geological Survey. Professional paper 38. 1905. #1:/Utah-Professional paper 38/bjm00128 ID. Boutwell, J.M. 128 Photomicrographs showing replacement of metamorphosed and a normal calcareous shale. Calcareous carbonaceous shale, from hanging wall, upper Red Wing Extension tunnel. Subangular quartz grains roughly bedded in calcareous, carbonaceous matrix. Some of calcareous material has partially segregated in irregular area of calcite grains and shows early stage of formation of calcite vein. This section is typical of those of the black shale in the geologically upper portion of the Bingham section. Salt Lake County, Utah. 1900, plate 35-B in U.S. Geological Survey. Professional paper 38. 1905. #1:/Utah-Professional paper 38/bjm00129 ID. Boutwell, J.M. 129 Photomicrographs of chalcopyrite and pyrite associated with contact metamorphic minerals. Green garnet in calcite, from Highland Boy limestone, no. 7 level, Highland Boy mine, 60 feet from monzonite intrusive. Individual crystals and aggregates of crystals of green garnet marmorized to limestone. Salt Lake County, Utah. 1900, plate 36-A in U.S. Geological Survey. Professional paper 38. 1905. #1:/Utah-Professional paper 38/bjm00130 ID. Boutwell, J.M. 130 Photomicrographs of chalcopyrite and pyrite associated with contact metamorphic minerals. Chalcopyrite and pyrite associated with green garnet in calcite. The darkest areas are chalcopyrite and pyrite grains intergrown with garnet. Near these crystals, just outside of this field, semi crystalline masses of pyrite and irregular masses of chalcopyrite are developed in and around garnets and zinc blende. Salt Lake County, Utah. 1900, plate 36-B in U.S. Geological Survey. Professional paper 38. 1905. #1:/Utah-Professional paper 38/bjm00131 ID. Boutwell, J.M. 131 Photomicrographs of chalcopyrite associated with contact metamorphic minerals. Chalcopyrite with zinc blende and garnet in calcite, from metamorphosed limestone 60 feet from monzonitic intrusive, no. 7 level, Highland Boy mine. The darkest areas are intergrowths of chalcopyrite and pyrite. They fringe the zinc blende and are intergrown with it and green garnet. The groundmass is calcite. Salt Lake County, Utah. 1900, plate 37-A in U.S. Geological Survey. Professional paper 38. 1905. #1:/Utah-Professional paper 38/bjm00132 ID. Boutwell, J.M. 132 Photomicrographs of chalcopyrite associated with contact metamorphic minerals. Specularite replacing calcite, from wall of east-west fissure, west end no. 6 level, Highland Boy mine. The black areas are foils of specularite, which replace calcite. The hand specimen from which this thin section was made shows chalcopyrite intergrown with specularite and replacing marble. Salt Lake County, Utah. 1900, plate 37-B in U.S. Geological Survey. Professional paper 38. 1905. #1:/Nevada-Professional paper 42/sje00139 ID. Spurr, J.E. 139 Recent basaltic cone near Silver Peak. Esmeralda County, Nevada. Circa 1900, plate 15- A in U.S. Geological Survey. Professional paper 42. 1905. Plate 2-A in U.S. Geological Survey. Professional paper 55. 1906. #1:/Nevada-Professional paper 42/sje00096 ID. Spurr, J.E. 96 East front of Quinn Canyon range, showing wash apron typical of region. Nye County, Nevada. Circa 1900, plate 15-B in U.S. Geological Survey. Professional paper 42. 1905. #1:/Alaska Glacier/pcw00046 ID. Purington, C.W. 46 Northern Glacier at Cape Douglas. Kodiak Island, Alaska. 1896. #1:/Alaska Glacier/pcw00047 ID. Purington, C.W. 47 Dionte Cliffs at Karluk. Kodiak Island, Alaska. 1896. #1:/Alaska Glacier/pcw00048 ID. Purington, C.W. 48 Northern Glacier at Cape Douglas. Kodiak Island, Alaska. 1896. #1:/Alaska Glacier/pcw00049 ID. Purington, C.W. 49 Northern Glacier at Cape Douglas. Kodiak Island, Alaska. 1896. #1:/Alasks-Professional paper 45/pcw00050 ID. Purington, C.W. 50 Mount St. Augustine, Cook Inlet, a typical ash cone. Alaska. 1896, plate 10 in U.S. Geological Survey. Professional paper 45. 1906. #1:/Alasks-Professional paper 45/pai00035 ID. Paige, S. 35 White Horse rapids of the Lewes River caused by recent lava flow. Yukon Territory, Canada. June 12, 1903, plate 26-A in U.S. Geological Survey. Professional paper 45. 1906. #1:/Wyoming-Professional paper 53/dnh01012 ID. Darton, N.H. 1012 Chugwater Red Beds, characteristic long cliff in eastern part of Bighorn basin, Big Horn County, Wyoming. 1904. Plate 9-A in U.S. Geological Survey. Professional paper 53. 1906. #1:/Colorado-Professional paper 52/dnh01040 ID. Darton, N.H. 1040 Different views of artesian well 10 miles south of Portland, depth about 1000 feet; flow about 700 gallons a minute from Dakota sandstone. Fremont County, Colorado. 1904. Plate 20-A and B (in reverse order) in U.S. Geological Survey. Professional paper 52. 1906. #1:/Colorado-Professional paper 52/dnh01041 ID. Darton, N.H. 1041 Different views of artesian well 10 miles south of Portland, depth about 1000 feet; flow about 700 gallons a minute from Dakota sandstone. Fremont County, Colorado. 1904. Plate 20-A and B (in reverse order) in U.S. Geological Survey. Professional paper 52. 1906. #1:/Colorado-Professional paper 52/dnh01045 ID. Darton, N.H. 1045 Conglomerate at base of "Red Beds" lying unconformably on Millsap limestone, 4 miles north northwest of Canyon [City], looking northeast. Fremont County, Colorado. 1904. Plate 20-A in U.S. Geological Survey. Professional paper 52. 1906. #1:/Colorado-Professional paper 52/dnh01065 ID. Darton, N.H. 1065 Timpas limestone in quarry southeast of La Junta shows thickness of beds and intercalations of shale. Otero County, Colorado. 1904. Plate 12-B in U.S. Geological Survey. Professional paper 52. 1906. #1:/Colorado-Professional paper 52/dnh01066 ID. Darton, N.H. 1066 Artesian well on ridge south of La Junta, depth 750 feet to Dakota sandstone, not flowing at present. Otero County, Colorado. 1904. Plate 24-A (obvious retouching) in U.S. Geological Survey. Professional paper 52. 1906. #1:/Colorado-Professional paper 52/dnh01074 ID. Darton, N.H. 1074 The Stonewall on Purgatory River west of Trinidad; a monoclinal ridge of "Dakota" sandstone, looking west to Culebra Range. Las Animas County, Colorado. 1904. Plate 11-A in U.S. Geological Survey. Professional paper 52. 1906. #1:/Wyoming-Professional paper 53/dnh01099 ID. Darton, N.H. 1099 Tensleep sandstone, No Wood Canyon, Big Horn basin, Washakie County, Wyoming. 1904. Plate 8-B in U.S. Geological Survey. Professional paper 53. 1906 #1:/Colorado-Professional paper 52/lwt00533 ID. Lee, W.T. 533 The Stonewall on Purgatory River west of Trinidad; a monoclinal ridge of "Dakota" sandstone, looking south, showing red valley to right and valley of Graneros and overlying shales to left. Las Animas County, Colorado. 1904. Plate 11-A in U.S. Geological Survey. Professional paper 52. 1906. Plate 20 in U.S. Geological Survey. Professional paper 101. 1917. #1:/Wyoming-Professional paper 53/fca00003 ID. Fisher, C.A. 3 Chugwater Red Beds, perpendicular wall near Shell, Bighorn County, Wyoming. 1904. Plate 9-B in U.S. Geological Survey. Professional paper 53. 1906. #1:/Wyoming-Professional paper 53/fca00007 ID. Fisher, C.A. 7 Basal Wasatch conglomerate lying unconformably on Laramie sandstone at head of Dry Cottonwood Creek. Park County, Wyoming. 1904. Plate 10-B in U.S. Geological Survey. Professional paper 53. 1906. #1:/Wyoming-Professional paper 53/fca00006 ID. Fisher, C.A. 6 Oil well and derrick near Bonanza, Big Horn County, Wyoming. 1904. Plate 15-A in U.S. Geological Survey. Professional paper 53. 1906 #1:/Fisher Collection/fca00009 ID. Fisher, C.A. 9 Hot Springs near Cody, looking north east. Park County, Wyoming. 1904. #1:/Fisher Collection/fca00010 ID. Fisher, C.A. 10 Hot Springs near Cody, showing pipe line leading to Sanitarium. Park County, Wyoming. 1904. #1:/Fisher Collection/fca00011 ID. Fisher, C.A. 11 Hot Springs amd Sanitarium, near Cody, looking north east. Park County, Wyoming. 1904. #1:/Fisher Collection/fca00012 ID. Fisher, C.A. 12 Placer Mining on Shoshone River, near Ralston. Park County, Wyoming. 1904. #1:/Fisher Collection/fca00015 ID. Fisher, C.A. 15 Artesian Well and Reservoir, near Hagerman. Chaves County, New Mexico. 1904. #1:/Fisher Collection/fca00016 ID. Fisher, C.A. 16 Artesian Well and Reservoir, near Hagerman. Chaves County, New Mexico. 1904. #1:/Fisher Collection/fca00018 ID. Fisher, C.A. 18 Slaughter's Artesian Well near Roswell. Chaves County, New Mexico. 1904. #1:/Fisher Collection/fca00019 ID. Fisher, C.A. 19 Hale's Artesian Well near Artesia. Eddy County, New Mexico. 1904. #1:/Fisher Collection/fca00023 ID. Fisher, C.A. 23 Shaw's pumping plant, near Roswell. Chaves County, New Mexico. 1904. #1:/Fisher Collection/fca00024 ID. Fisher, C.A. 24 Hondu overflow at Roswell. Chaves County, New Mexico. November 1, 1901. #1:/Fisher Collection/fca00025 ID. Fisher, C.A. 25 Bridge across Pecos River, 9 miles south east of Roswell. Chaves County, New Mexico. 1904. #1:/Fisher Collection/fca00026 ID. Fisher, C.A. 26 Head of South Sring River, near Roswell. Chaves County, New Mexico. 1904. #1:/Fisher Collection/fca00027 ID. Fisher, C.A. 27 Near view of marginal Spring Head of South Spring River near Roswell. Chaves County, New Mexico. 1904. #1:/Fisher Collection/fca00028 ID. Fisher, C.A. 28 Near view of marginal Spring Head of South Spring River near Roswell. Chaves County, New Mexico. 1904. #1:/Fisher Collection/fca00038 ID. Fisher, C.A. 38 Near view of Rainbow Falls in Missouri River, near Great Falls. Cascade County, Montana. 1904. #1:/Fisher Collection/fca00039 ID. Fisher, C.A. 39 Rainbow Falls in Missouri River east of Great Falls. Cascade County, Montana. 1904. #1:/Fisher Collection/fca00040 ID. Fisher, C.A. 40 Rainbow Falls in Missouri River east of Great Falls. Cascade County, Montana. 1904. #1:/Fisher Collection/fca00041 ID. Fisher, C.A. 41 Giant Springs on south bank of Missouri River, near Great Falls. Cascade County, Montana. 1904. #1:/Colorado-Professional paper 54/rfl00491 ID. Ransome, F.L. 491 Cripple Creek, looking west from Gold Hill. The Midget and Conundrum mines are in the foreground and Mount Pisgah is in the background. Teller County, Colorado. October 3, 1903, plate 4-A in U.S. Geological Survey. Professional paper 54. 1906. #1:/Colorado-Professional paper 54/rfl00497 ID. Ransome, F.L. 497 Cripple Creek, looking northeast. The partly wooded knob on the left is Rhyolite Mountain. Just beyond the town are Mineral and Carbonate hills and in the background is Pikes Peak. Teller County, Colorado. September 181903, plate 4-B in U.S. Geological Survey. Professional paper 54. 1906. #1:/Colorado-Professional paper 54/rfl00519 ID. Ransome, F.L. 519 Victor, from Squaw Mountain, the shaft house of the Gold Coin mine is in the left foreground and the St. Patrick mine in the middle ground. Teller County, Colorado. October 3, 1903, plate 6-A in U.S. Geological Survey. Professional paper 54. 1906. #1:/Colorado-Professional paper 54/rfl00506 ID. Ransome, F.L. 506 Rhyolite Mountain from summit of Bull Hill. Teller County, Colorado. October 8, 1903, plate 21-A in U.S. Geological Survey. Professional paper 54. 1906. #1:/Colorado-Professional paper 54/rfl00507 ID. Ransome, F.L. 507 Pikes Peak from summit of Bull Hill, town of Gillett in left middle ground. Teller County, Colorado. October 8, 1903, plate 21-B in U.S. Geological Survey. Professional paper 54. 1906. #1:/Colorado-Professional paper 54/rfl00520 ID. Ransome, F.L. 520 Beacon and Grouse Hills from Raven Hill. Teller County, Colorado. October 8, 1903, plate 24-B in U.S. Geological Survey. Professional paper 54. 1906. #1:/Colorado-Professional paper 54/rfl00525 ID. Ransome, F.L. 525 Bull cliff and town of Independence, Vindicator mine to right. Teller County, Colorado. October 7, 1903, plate 25-B in U.S. Geological Survey. Professional paper 54. 1906. #1:/United States-Professional paper 60/djs00041 ID. Diller, J.S. 41 Mount Shasta from the north near Sheep Rock. Siskiyou County, California, circa 1900, plate 9-B in U.S. Geological Survey. Professional paper 60. 1908. #1:/United States-Professional paper 60/sgw00947 ID. Stose, G.W. 947 Moraine topography at north end of Lake Grinnell, looking east across the north end. Sussex County, New Jersey. Before 1908. Plate 15-B in U.S. Geological Survey. Professional paper 60. 1908. Figure 4 in U.S. Geological Survey. Folio 161. 1908. #1:/United States-Professional paper 60/ccw00354 ID. Cross, C.W. 354 Alluvial fan at mouth of Aztec Gulch from east side of Dolores River, Rico quadrangle, Dolores County, Colorado, November 1898, plate 47 in U.S. Geological Survey. Professional paper 60. 1908. Figure 4 in U.S. Geological Survey. Folio 130. 1905. Plate 21 in U.S. Geological Survey. 21st Annual report, part 2. 1899-1900. #1:/United States-Professional paper 60/dnh00593 ID. Darton, N.H. 593 Sink hole in Minnehakta limestone southeast of Boyd, Weston County, Wyoming, circa 1900, Plate 92 in U.S. Geological Survey. Professional paper 60. 1908. Plate 8-B in U.S. Geological Survey. Professional paper 65. 1909. #1:/United States-Professional paper 60/sgw00768 ID. Stose, G.W. 768 Morro Rock from the east. San Luis Obispo County, California, circa 1900, plate 132-B in U.S. Geological Survey. Professional paper 60. 1908. Figure 5 in U.S. Geological Survey. Folio 101. 1904. #1:/United States-Professional paper 60/sgw00769 ID. Stose, G.W. 769 Morro Bay from the south, Morro rock in the left distance. San Luis Obispo County, California, circa 1900, plate 132-A in U.S. Geological Survey. Professional paper 60. 1908, figure 2 in U.S. Geological Survey. Folio 101. 1904. #1:/United States-Professional paper 60/sgw00772 ID. Stose, G.W. 772 An elevated wave-cut terrace north of Port Harford, San Luis Obispo County, California, circa 1900, plate 152-A in U.S. Geological Survey. Professional paper 60. 1908. Figure 6 in U.S. Geological Survey. Folio 101. 1904. #1:/United States-Professional paper 60/sgw00774 ID. Stose, G.W. 774 Elevated wave-cut terraces at Mallagh Landing, San Luis Obispo County, California, circa 1900, plate 143-B in U.S. Geological Survey. Professional paper 60. 1908. Figure 11 in U.S. Geological Survey. Folio 101. 1904. #1:/United States-Professional paper 60/sgw00776 ID. Stose, G.W. 776 Tidal lagoon formed by sand spit at mouth of San Luis Obispo Creek. San Luis Obispo County, California, circa 1900, plate 152-B in U.S. Geological Survey. Professional paper 60. 1908. Figure 7 in U.S. Geological Survey. Folio 101. 1904. #1:/United States-Professional paper 60/sgw00777 ID. Stose, G.W. 777 Overhanging cliffs of tilted Monterey shale on coast near Pismo, San Luis Obispo County, California, circa 1900, plate 143-A in U.S. Geological Survey. Professional paper 60. 1908. Figure 10 in U.S. Geological Survey. Folio 101. 1904. #1:/Nevada-Professional paper 55/sje00153 ID. Spurr, J.E. 153 Edge of Silver Peak flat, 1.5 miles southwest of Paymaster camp, looking north, shows streams of wash flowing down from the mountains of Cambrian rock and uniting to form a frontal wash apron. Esmeralda County, Nevada. Circa 1902, plate 3-A in U.S. Geological Survey. Professional paper 55. 1906. #1:/Nevada-Professional paper 55/sje00157 ID. Spurr, J.E. 157 Detrital apron fringing mountains of probably Cambrian rock, looking west on road from Silver Peak to Tonopah, 3 miles north of Paymaster camp, flat intermontane valley in foreground. Esmeralda County, Nevada. Circa 1902, plate 3-B in U.S. Geological Survey. Professional paper 55. 1906. #1:/Nevada-Professional paper 55/sje00159 ID. Spurr, J.E. 159 View southward from near the Lone Mountain syndicate prospect, shows mountains to the south with their fringing wash apron. The foreground is a lower part of the general Lone Mountain wash apron. Esmeralda County, Nevada. Circa 1902, plate 4-A in U.S. Geological Survey. Professional paper 55. 1906. #1:/Nevada-Professional paper 55/sje00162 ID. Spurr, J.E. 162 Form a panoramic view of layering of sub aerial wash, section of western edge of Lone Mountain wash apron in northwest part of Silver Peak quadrangle. Esmeralda County, Nevada. Circa 1902, plate 4-B in U.S. Geological Survey. Professional paper 55. 1906. #1:/Nevada-Professional paper 55/sje00163 ID. Spurr, J.E. 163 Form a panoramic view of layering of sub aerial wash, section of western edge of Lone Mountain wash apron in northwest part of Silver Peak quadrangle. Esmeralda County, Nevada. Circa 1902, plate 4-B in U.S. Geological Survey. Professional paper 55. 1906. #1:/Nevada-Professional paper 55/sje00146 ID. Spurr, J.E. 146 Crowning glory lens zone, open-cut working and mouths of tunnels Drinkwater mine. Esmeralda County, Nevada. Circa 1902, plate 7-A in U.S. Geological Survey. Professional paper 55. 1906. #1:/Nevada-Professional paper 55/sje00148 ID. Spurr, J.E. 148 Entrance to upper workings, Drinkwater mine. Esmeralda County, Nevada. Circa 1902, plate 7-B in U.S. Geological Survey. Professional paper 55. 1906. #1:/Nevada-Professional paper 55/sje00156 ID. Spurr, J.E. 156 Paymaster mine, Lone Mountain district, Esmeralda County, Nevada. Circa 1902, plate 21-A, with some retouching, in U.S. Geological Survey. Professional paper 55. 1906. #1:/Nevada-Professional paper 55/sje00170 ID. Spurr, J.E. 170 Form a panorama, of coal fields at north end of Silver Peak range. Esmeralda County, Nevada. Circa 1902, plate 24 in U.S. Geological Survey. Professional paper 55. 1906. #1:/Nevada-Professional paper 55/sje00171 ID. Spurr, J.E. 171 Form a panorama, of coal fields at north end of Silver Peak range. Esmeralda County, Nevada. Circa 1902, plate 24 in U.S. Geological Survey. Professional paper 55. 1906. #1:/Nevada-Professional paper 55/sje00205 ID. Spurr, J.E. 205 Mill at Silver Peak. Esmeralda County, Nevada. Circa 1902, plate 2-B in U.S. Geological Survey. Professional paper 55. 1906. #1:/Montana-Professional paper 57/crh00096 ID. Chapman, R.H. 96 The Continental Divide, looking northwest from Mount Belmont, the divide, lying at a distance of 10 miles, attains an elevation on the left of 8,400 feet on the right of 7,100 feet. The front face is composed of rocks belonging to the Belt group and is deeply dissected by the tributaries of Little Prickly Pear Creek. The creek rises in the foreground and describes a complete semicircle in the middle distance. The mining camp of Empire is seen in the gulch bottom. The forested northeastern slopes contrast sharply with the grassy southwestern slopes. the topographic forms are similar to photograph 97. Lewis and Clark County, Montana. 1901. Plate 3-b in U.S. Geological Survey. Professional paper 57. 1907. (Album photo has been cropped.) #1:/Montana-Professional paper 57/crh00097 ID. Chapman, R.H. 97 Drumlummon Hill and amphitheater of Marysville, looking southeast from slopes of Mount Belmont, mountains flanking Missouri River in the distance. Prickly Pear trough in the middle distance, Helena limestone in the near distance, Drumlummon Hill on the right; granite contact runs along the hill near the lines of roads and mine dumps. Marysville in basin on the left side of photo. Lewis and Clark County, Montana. 1901. Plate 3-A in U.S. Geological Survey. Professional paper 57. 1907. #1:/Arkansas-Professional paper 24/agi00053 ID. Adams, G.I. 53 Open cut in barren ground near Iola Mine, showing jointed dolomite. Marion County, Arkansas. 1902. Plate 17-A in U.S. Geological Survey. Professional paper 24. 1904. #1:/Arkansas-Professional paper 24/agi00054 ID. Adams, G.I. 54 Bear Hill Mine. Sec. 11,T.19 N., R. 17 W. Marion County, Arkansas. 1902. Plate 20-A in U.S. Geological Survey. Professional paper 24. 1904. #1:/Arkansas-Professional paper 24/agi00055 ID. Adams, G.I. 55 Open cut in Big Elephant Mine, Key sandstone in upper part of exposure. NE 1/4 sec. 30, T.20 N., R.16. W. Marion County, Arkansas. 1902. Plate 18-A in U.S. Geological Survey. Professional paper 24. 1904 #1:/Arkansas-Professional paper 24/agi00060 ID. Adams, G.I. 60 East end of main cut at Morning Star mine, showing fissure opposite end of track. Marion County, Arkansas. 1902. Plate 23-A in U.S. Geological Survey. Professional paper 24. 1904. #1:/Arkansas-Professional paper 24/agi00062 ID. Adams, G.I. 62 White Eagle mine NW 1/4 sec. 11, T. 17 N., R. 15 W. Marion County, Arkansas. 1902. Plate 25-A in U.S. Geological Survey. Professional paper 24. 1904. #1:/Arkansas-Professional paper 24/agi00064 ID. Adams, G.I. 64 Open cut, Hulsenbeck property NE 1/4 sec. 1 T.21 N., R.13 W. Baxter County, Arkansas. 1902. Plate 26-A in U.S. Geological Survey. Professional paper 24. 1904. #1:/Louisiana-Arkansas-Professional paper 46/vac00007 ID. Veatch, A.C. 7 Typical landslip bench, side of Rocky Mountain, 5 miles east of Hope, sec. 29, T. 12 S., R 23 W. Hempstead County, Arkansas. December 17, 1903, plate 5-B in U.S. Geological Survey. Professional paper 46. 1906. #1:/Louisiana-Arkansas-Professional paper 46/vac00010 ID. Veatch, A.C. 10 Natural mounds at Prescott, substructure; Arkadelphia Cretaceous. Nevada County, Arkansas. January 18, 1903, plate 26-C in U.S. Geological Survey. Professional paper 46. 1906. #1:/Louisiana-Arkansas-Professional paper 46/vac00014 ID. Veatch, A.C. 14 Typical outcrop of Lafayette gravel, 3 miles east of Prescott, Nevada County, Arkansas. January 22, 1903, plate 25-A in U.S. Geological Survey. Professional paper 46. 1906. #1:/Louisiana-Arkansas-Professional paper 46/vac00019 ID. Veatch, A.C. 19 Outcrop of Nacatoch sand in Nacatoch Bluff, the hard ledges, when encountered in wells, are called "water rocks," because water is commonly found beneath them. Clark County, Arkansas. circa 1903, plate 12-C in U.S. Geological Survey. Professional paper 46. 1906. #1:/Louisiana-Arkansas-Professional paper 46/vac00027 ID. Veatch, A.C. 27 Escarpment on the southern edge of the Marksville Hills, a Port Hudson terrace in Avoyelles Parish, Louisiana. February 21,1903, plate 25-C in U.S. Geological Survey. Professional paper 46. 1906. #1:/New York-Professional paper 46/vac00068 ID. Veatch, A.C. 68 Mud cones near Douglastown, Long Island, formed by pressure of artesian water. Queens County, New York. August 6, 1903, plate 27-C in U.S. Geological Survey. Professional paper 46. 1906. #1:/Louisiana-Arkansas-Professional paper 46/vac00100 ID. Veatch, A.C. 100 Open water at foot of one of the several rafts, which made up the great Red River Raft. Timber jams and open water alternated throughout the length of the Great Raft, the open water being about one-half to two-thirds of the whole. Photograph by R.B. Talfor, 1873. Location: one-half mile above head of Red Bayou, opposite Millers Bluff; sec. 16, T. 22 N., R. 14 W. Caddo Parish, Louisiana, plate 30-A in U.S. Geological Survey. Professional paper 46. 1906. #1:/Louisiana-Arkansas-Professional paper 46/vac00102 ID. Veatch, A.C. 102 One of several timber jams composing the great Red River Raft. In the region of slack water produced by these jams silt accumulated very rapidly and effectually filled the channel of the river. Photograph by R.B. Talfor, 1873. Location: Channel of the Red River, 5 miles below the Arkansas-Louisiana state line; sec. 29, T. 23 N., R. 14 W. Caddo Parish, Louisiana, plate 29-B in U.S. Geological Survey. Professional paper 46. 1906. #1:/Louisiana-Arkansas-Professional paper 46/vac00105 ID. Veatch, A.C. 105 Different views of main channel of Red River immediately after removal of Great Raft in 1873, showing silt accumulated during raft period. Photograph by R.B. Talfor, location: between Wild Lucia and Dooley's Bayou; T. 21 N., R. 14 W. Caddo Parish, Louisiana, plate 31-A and B respectively in U.S. Geological Survey. Professional paper 46. 1906. #1:/Louisiana-Arkansas-Professional paper 46/vac00106 ID. Veatch, A.C. 106 Different views of main channel of Red River immediately after removal of Great Raft in 1873, showing silt accumulated during raft period. Photograph by R.B. Talfor, location: between Wild Lucia and Dooley's Bayou; T. 21 N., R. 14 W. Caddo Parish, Louisiana, plate 31-A and B respectively in U.S. Geological Survey. Professional paper 46. 1906. #1:/Louisiana-Arkansas-Professional paper 46/vac00107 ID. Veatch, A.C. 107 Timber deadened in shallow lake produce by the raft. Photograph by R.B. Talfor, 1873. Location: Sec. 33, T. 23 N., R 14 W. Caddo Parish, Louisiana, plate 30-B in U.S. Geological Survey. Professional paper 46. 1906. #1:/Louisiana-Arkansas-Professional paper 46/vac00108 ID. Veatch, A.C. 108 Timber deadened in temporary raft lake which was drained by the removal of the raft. Photograph by R.B. Talfor, 1873. Location: Head of McWillie Lake, sec. 16, T. 22 N., R. 14 W., Bossier Parish, and Louisiana, plate 30-C in U.S. Geological Survey. Professional paper 46. 1906. #1:/Louisiana-Arkansas-Professional paper 46/vac00113 ID. Veatch, A.C. 113 Steamer "Aid" removing a portion of the great Red River Raft, in 1873, note powerful lifting cranes and inclined platform bow, on which logs were hauled up for cutting with steam and hand saws. Photograph by R.B. Talfor, location: 1 mile above Cedar Bluffs, sec. 22, T. 21 N., R. 14 W., Caddo Parish, Louisiana, plate 29-A in U.S. Geological Survey. Professional paper 46. 1906. #1:/Wyoming-Professional paper 56/vac00116 ID. Veatch, A.C. 116 Outcrops of Almy and Knight formations, typical lower Knight badlands, SW 1/4 sec. 25, T.20 N., R. 120 W. Lincoln County, Wyoming. 1905, plate 17-B in U.S. Geological Survey. Professional paper 56. 1907. #1:/Wyoming-Professional paper 56/vac00118 ID. Veatch, A.C. 118 Almy conglomerate in SW 1/4 sec. 25, T. 20 N. R. 120 W. Lincoln County, Wyoming. 1905, plate 16-B in U.S. Geological Survey. Professional paper 56. 1907. #1:/Wyoming-Professional paper 56/vac00119 ID. Veatch, A.C. 119 East side of Rock Creek at Porter ranch, 1 mile north of Nugget station, thin bedded fossiliferous limestone. These beds here occur on the eastern flank of a slightly overturned anticline. This view also shows the vegetation of this region, the barren uplands covered sparingly with sagebrush, the willow fringe along Rock Creek, and in the foreground the irrigated meadow of wild grass partially mowed. Lincoln County, Wyoming. 1905, plate 5-A in U.S. Geological Survey. Professional paper 56. 1907. #1:/Wyoming-Professional paper 56/vac00120 ID. Veatch, A.C. 120 East side of Rock Creek, north side of Sheep Canyon, 3 miles north of Nugget station, thin bedded fossiliferous limestone, the vertical limestone in the center yielded the fossils listed from Sheep Canyon. The Woodside reds beds occur just below this layer to the left. Note the hillside covered with sage and haw bushes. Lincoln County, Wyoming. 1905, plate 5-B in U.S. Geological Survey. Professional paper 56. 1907. #1:/Wyoming-Professional paper 56/vac00127 ID. Veatch, A.C. 127 Lazeart syncline at Lazeart coal mine, SE 1/4 , SW 1/4, sec. 8, T. 15 N., R. 118 W. The white sandstone underlies the Adaville coal seam, here 35 feet thick. The beds form the upper part of the hill on horizontal Knight. Uinta County, Wyoming. 1905, plate 22-A in U.S. Geological Survey. Professional paper 56. 1907. #1:/Wyoming-Professional paper 56/vac00128 ID. Veatch, A.C. 128 Lazeart sandstone at Lazeart, view north, showing typical exposures, note fringe of willows along creek and rock cedar on face of sandstone exposure. Uinta County, Wyoming. 1905, plate 7-B in U.S. Geological Survey. Professional paper 56. 1907. #1:/Wyoming-Professional paper 56/vac00129 ID. Veatch, A.C. 129 Relation of Evanston and Almy formations at the type locality, at Evanston, the line of parting between Evanston and Almy formations lies between the points A and B in plate 13-B; upper beds are conglomeratic Almy; lower Evanston. Slack pile at foot of hill in foreground marks sited of old mine no. 2. The hills across the irrigated bottom of Bear River ate composed of nearly horizontal strata belonging to Knight formation. Cook County, Wyoming. 1905, plate 13-A in U.S. Geological Survey. Professional paper 56. 1907. #1:/Wyoming-Professional paper 56/vac00130 ID. Veatch, A.C. 130 Relation of Evanston and Almy formations at the type locality, at Evanston, the line of parting between Evanston and Almy formations lies between the points A and B in plate 13-B; upper beds are conglomeratic Almy; lower Evanston. Slack pile at foot of hill in foreground marks sited of old mine no. 2. The hills across the irrigated bottom of Bear River ate composed of nearly horizontal strata belonging to Knight formation. Cook County, Wyoming. 1905, plate 13-A in U.S. Geological Survey. Professional paper 56. 1907. #1:/Wyoming-Professional paper 56/vac00131 ID. Veatch, A.C. 131 Relation of Evanston and Almy formations at the type locality, at Evanston, the line of parting between Evanston and Almy formations lies between the points A and B in plate 13-B; upper beds are conglomeratic Almy; lower Evanston. Slack pile at foot of hill in foreground marks sited of old mine no. 2. The hills across the irrigated bottom of Bear River ate composed of nearly horizontal strata belonging to Knight formation. Cook County, Wyoming. 1905, plate 13-A in U.S. Geological Survey. Professional paper 56. 1907. #1:/Wyoming-Professional paper 56/vac00134 ID. Veatch, A.C. 134 Syncline 1 mile southwest of Carter Oil spring, prominent white sandstone is Oyster Ridge sandstone. Vegetation is largely sage, with occasional haw bushes, and with exceptional clump of aspen in the head of the hollow in the right foreground. Uinta County, Wyoming. 1905, plate 22-B in U.S. Geological Survey. Professional paper 56. 1907. #1:/Wyoming-Professional paper 56/vac00156 ID. Veatch, A.C. 156 Form a panorama, relations of Evanston and Almy formations at the type locality; detail of prominent hill at left of plate 13-A; parting line between Evanston and Almy formations is shown slightly to left of center in photo 157. Cook County, Wyoming. 1905, plate 13-A in U.S. Geological Survey. Professional paper 56. 1907. #1:/Wyoming-Professional paper 56/vac00157 ID. Veatch, A.C. 157 Form a panorama, relations of Evanston and Almy formations at the type locality; detail of prominent hill at left of plate 13-A; parting line between Evanston and Almy formations is shown slightly to left of center in photo 157. Cook County, Wyoming. 1905, plate 13-A in U.S. Geological Survey. Professional paper 56. 1907. #1:/Wyoming-Professional paper 56/vac00158 ID. Veatch, A.C. 158 Form a panorama, relations of Evanston and Almy formations at the type locality; detail of prominent hill at left of plate 13-A; parting line between Evanston and Almy formations is shown slightly to left of center in photo 157. Cook County, Wyoming. 1905, plate 13-A in U.S. Geological Survey. Professional paper 56. 1907. #1:/Wyoming-Professional paper 56/vac00161 ID. Veatch, A.C. 161 Outcrops of Almy and Knight formations, view showing relation of beds near and east of Medicine Butte fault, just north of Whitney Canyon. Note Almy beds with Knight beds unconformably in the distance. This angular unconformity is also well marked just east of the anticline in the Almy beds. Uinta County, Wyoming. 1905, plate 17-A, with graphics, in U.S. Geological Survey. Professional paper 56. 1907. #1:/Wyoming-Professional paper 56/vac00169 ID. Veatch, A.C. 169 Two different views of Sulphur Creek section, showing relations of beds in eastern portion of Meeks section at Old Bear River City. Uinta County, Wyoming. 1905, plates 21-A and B, respectively, in U.S. Geological Survey. Professional paper 56. 1907. #1:/Wyoming-Professional paper 56/vac00170 ID. Veatch, A.C. 170 Two different views of Sulphur Creek section, showing relations of beds in eastern portion of Meeks section at Old Bear River City. Uinta County, Wyoming. 1905, plates 21-A and B, respectively, in U.S. Geological Survey. Professional paper 56. 1907. #1:/Wyoming -Professional paper 51/dnh00827 ID. Darton, N.H. 827 Moncrief Ridge; high boulder terrace abutting against east slope of Bighorn Mountains, six miles southeast of Bighorn; looking across valley of Little Goose Creek. Granite to right, Bighorn and Madison limestone ridge to right middle, boulder terrace to left. Sheridan County, Wyoming. circa 1903, plate 24-A in U.S. Geological Survey. Professional paper 51. 1906. #1:/Wyoming -Professional paper 51/dnh00831 ID. Darton, N.H. 831 Near view of high level boulder deposit at northwest end of Moncrief Ridge, six miles southeast of Bighorn, looking east. Boulder are mainly granite, mostly rotted and in matrix of sand. Sheridan County, Wyoming. circa 1903, plate 25 in U.S. Geological Survey. Professional paper 51. 1906. #1:/Wyoming -Professional paper 51/dnh00838 ID. Darton, N.H. 838 East slope of limestone front ridge of Bighorn Mountains, summits to right are Bighorn limestone surmounting slopes of Deadwood formation and overlain to left and in distance by Madison limestone, looking south from north side of canyon of Little Tongue River. Sheridan County, Wyoming. circa 1903, plate 10-A in U.S. Geological Survey. Professional paper 51. 1906. Figure 6 in U.S. Geological Survey. Folio 141. 1906. #1:/Wyoming -Professional paper 51/dnh00843 ID. Darton, N.H. 843 Fault on the south side of Wolf Creek Canyon, displacement amounts to about 400 feet and is in middle of view. Bighorn limestone in cliff to right and again prominently several hundred feet higher to the left; above are Madison limestones, looking south. Sheridan County, Wyoming.h circa 1903, plate 40-A, with diagram, in U.S. Geological Survey. Professional paper 51. 1906. Figure 8 in U.S. Geological Survey. Folio 141. 1906. #1:/Wyoming -Professional paper 51/dnh00845 ID. Darton, N.H. 845 Upper canyon of Wolf Creek, looking southward, granite to right, Deadwood slopes to left surmounted by cliffs of Bighorn and Madison limestones; Walker Mountain in distance to right. Sheridan County, Wyoming. circa 1903, plate 9-B in U.S. Geological Survey. Professional paper 51. 1906. Figure 1 in U.S. Geological Survey. Folio 141. 1906. #1:/Wyoming -Professional paper 51/dnh00851 ID. Darton, N.H. 851 Tensleep canyon, walls of Bighorn and Madison limestones, the former conspicuous in the lower cliff to right, looking northeast. Bighorn County, Wyoming. circa 1903, plate 13-A in U.S. Geological Survey. Professional paper 51. 1906. #1:/Wyoming -Professional paper 51/dnh00852 ID. Darton, N.H. 852 Fault on Trapper Creek, six miles north of Black Butte, Bighorn Mountains, upturned Deadwood beds to left; Bighorn limestones to right. Bighorn County, Wyoming. circa 1903, plate 40-B in U.S. Geological Survey. Professional paper 51. 1906. #1:/Wyoming -Professional paper 51/dnh00853 ID. Darton, N.H. 853 Granite slope rising above the valley of Deadwood shale, Rapid Creek, east side of Bighorn Mountains; looking southwest, shows steep rise of the granite, causing rapids in the stream. Sheridan County, Wyoming. circa 1903, plate 3-B in U.S. Geological Survey. Professional paper 51. 1906. #1:/Wyoming -Professional paper 51/dnh00912 ID. Darton, N.H. 912 Kingsbury conglomerate abutting against Madison limestone, North Branch of North Piney Creek, east side of Bighorn Mountains, northwest of Buffalo; shows irregular bodies of soft sandstone in the formation. Johnson County, Wyoming. circa 1903, plate 19-B in U.S. Geological Survey. Professional paper 51. 1906. #1:/Wyoming -Professional paper 51/dnh00917 ID. Darton, N.H. 917 High boulder terraces on either side of Clear Creek, east slope of Bighorn Mountains, west of Buffalo, view from Johnson Creek; looking south to terraces in distant middle ground. Front ridge of Bighorn and Madison limestone to right, against which are faulted the De Smet formation in the middle ground. Johnson County, Wyoming. circa 1903, plate 24-B in U.S. Geological Survey. Professional paper 51. 1906. #1:/Wyoming -Professional paper 51/dnh00918 ID. Darton, N.H. 918 Limestone breccia of Kingsbury conglomerate on Madison limestone, a great fault and overlap south of Bighorn, looking north over lowlands of De Smet and underlying formations. Sheridan County, Wyoming. circa 1903, plate 19-A in U.S. Geological Survey. Professional paper 51. 1906. #1:/Wyoming -Professional paper 51/dnh00920 ID. Darton, N.H. 920 East slope of the limestone front ridge of the Bighorn Mountains, twenty miles west- northwest of Sheridan, looking west-southwest, shows eastern dip, with a local syncline to the right of center in distance; higher ridges due to Madison limestone; Tensleep sandstones on the slopes ending in valley of Chugwater Red Beds in middle ground. Sheridan County, Wyoming. July 1902, plate 39-A in U.S. Geological Survey. Professional paper 51. 1906. #1:/Wyoming -Professional paper 51/dnh00928 ID. Darton, N.H. 928 Head of south prong of South Fork of South Piney Creek, above Meade Lake, remnant pf cirque to left, beyond, which is head of Middle Fork of Paintrock Creek. Gap is due to the encroachment of two cirques. Cloud Peak lies beyond high point slightly to right of middle of picture, lake in characteristic rock basin in foreground. Johnson County, Wyoming. circa 1903, plate 33-B in U.S. Geological Survey. Professional paper 51. 1906. #1:/Wyoming -Professional paper 51/dnh00929 ID. Darton, N.H. 929 Glacier in head of cirque on east side of Cloud Peak shows moraine and lake. Cloud Peak is high point to left, looking southwest. Johnson County, Wyoming. circa 1903, plate 36- A in U.S. Geological Survey. Professional paper 51. 1906. Figure 9 in U.S. Geological Survey. Folio 142. 1906. #1:/Wyoming -Professional paper 51/dnh00932 ID. Darton, N.H. 932 Granite ridge on summit of Bighorn Mountains, one mile south of Cloud Peak, looking south, shows powerful erosion by frost on steep cirque wall. Johnson County, Wyoming. circa 1903, plate 30 in U.S. Geological Survey. Professional paper 51. 1906. #1:/Wyoming -Professional paper 51/dnh00933 ID. Darton, N.H. 933 Granite, Deadwood formation, Bighorn limestone on Johnson Creek, east slope of Bighorn Mountains, northwest of Buffalo, looking west, granite on left side of creek, overlain by thick basal Deadwood sandstone on right side. Deadwood shales and limestone above capped by Bighorn limestone in characteristic cliffs, Piney beds brought down by a great fault, at extreme right. Johnson County, Wyoming. circa 1903, plate 10- B, with diagram, in U.S. Geological Survey. Professional paper 51. 1906. Figure 17 in U.S. Geological Survey. Folio 142. 1906. #1:/Wyoming -Professional paper 51/dnh00941 ID. Darton, N.H. 941 Meade Lake near head of South Fork of South Piney River, Big Horn Mountions. A Glacial Lake basin in granite; altitude about 9,950 feet. Looking southwest Photograph by J. Stimson. Johnson County, Wyoming. circa 1903, plate 5-B in U.S. Geological Survey. Professional paper 51. 1906. #1:/Wyoming -Professional paper 51/dnh00946 ID. Darton, N.H. 946 Kearney Lake on North Fork of South Piney Creek, altitude 9,156 feet; valley in granite, dammed by moraine, looking east. Photo by J. Stimson. Johnson County, Wyoming. circa 1903, plate 44-B in U.S. Geological Survey. Professional paper 51. 1906. #1:/Wyoming -Professional paper 51/dnh00948 ID. Darton, N.H. 948 Glacier on east slope of peak north of Cloud Peak, crest of Bighorn Mountains, at head of south prong of North Fork of South Piney Creek, looking southwest, granite with glacial topography. Photo by J. Stimson. Johnson County, Wyoming. circa 1903, plate 36-B in U.S. Geological Survey. Professional paper 51. 1906. #1:/Wyoming -Professional paper 51/dnh00950 ID. Darton, N.H. 950 Anticline on east slope of Bighorn uplift, north side of canyon of Little Bighorn River. Granite to right overlain by Deadwood formations, Bighorn and Madison limestones: knob to right and park to left are Amsden formation. Sheridan County, Wyoming. circa 1903, plate 41-B in U.S. Geological Survey. Professional paper 51. 1906. #1:/Wyoming -Professional paper 51/dnh00952 ID. Darton, N.H. 952 Flexures on west slope of Bighorn uplift on North Beaver Creek. Four miles north of Cloverly, looking northwest; to right are Bighorn and Madison limestone and overlying beds dipping steeply west; to the left of middle is shallow syncline in Red Beds; to extreme left are steep westerly dips again. Bighorn County, Wyoming. circa 1903, plate 41-A in U.S. Geological Survey. Professional paper 51. 1906. Figure 12 in U.S. Geological Survey. Folio 141. 1906. #1:/Wyoming -Professional paper 51/dnh00971 ID. Darton, N.H. 971 Morainal lakes on upper slopes of west side of Bighorn Mountains, region is granite, covered by glacial drift. Paintrock Lake in distance to right, looking west to Black Butte in distance. Big Horn County, Wyoming. circa 1903, plate 34-B in U.S. Geological Survey. Professional paper 51. 1906. Figure 15 in U.S. Geological Survey. Folio 142. 1906. #1:/Wyoming -Professional paper 51/dnh00979 ID. Darton, N.H. 979 Bighorn summit at Cloud Peak and northward, typical glacial erosion with small glaciers still present; Cloud Peak to right; great dike of diabase to upper left. Looking eastward from near head of north prong of Middle Fork of Paintrock Creek. Big Horn County, Wyoming. circa 1903, plate 29 in U.S. Geological Survey. Professional paper 51. 1906. Figure 11 in U.S. Geological Survey. Folio 142. 1906. #1:/Wyoming -Professional paper 51/dnh00981 ID. Darton, N.H. 981 Cloud Peak from the southwest, summit is to the right of middle; near right hand margin is low gap at head of South Fork of South Piney Creek, glaciated granite topography. Big Horn County, Wyoming. circa 1903, plate 8-A in U.S. Geological Survey. Professional paper 51. 1906. #1:/Wyoming -Professional paper 51/dnh00983 ID. Darton, N.H. 983 Lake due to moraine on east prong of west Tensleep Creek, altitude, 9,000 feet, looking northeast toward peak, 12,410 feet above sea level. Big Horn County, Wyoming. circa 1903, plate 34-A in U.S. Geological Survey. Professional paper 51. 1906. Figure 10 in U.S. Geological Survey. Folio 142. 1906. #1:/Wyoming -Professional paper 51/dnh00986 ID. Darton, N.H. 986 Great north facing cirque at head of east prong of west Tensleep Creek, glacial erosion in granite; characteristic frost-heaved rock in foreground, looking southeast toward summit, 12, 292 feet above sea level. Big Horn County, Wyoming. circa 1903, plate 31-A in U.S. Geological Survey. Professional paper 51. 1906. Figure 14 in U.S. Geological Survey. Folio 142. 1906. #1:/Wyoming -Professional paper 51/dnh00991 ID. Darton, N.H. 991 Tensleep sandstone constituting east slope of limestone front ridge of Bighorn Mountains, near mouth of canyon of North Fork of Powder River, valley of Red Beds to left. Johnson County, Wyoming. circa 1903, plate 17-B in U.S. Geological Survey. Professional paper 51. 1906. #1:/Wyoming -Professional paper 51/dnh00993 ID. Darton, N.H. 993 Canyon of North Fork of Powder River, view from Tensleep sandstone of east wall of canyon, looking west, cliffs to left are Madison limestone, dipping east. Johnson County, Wyoming. circa 1903, plate 8-B in U.S. Geological Survey. Professional paper 51. 1906. #1:/Wyoming -Professional paper 51/dnh00995 ID. Darton, N.H. 995 Amsden and associated formations in sharp upturn on east side of limestone front ridge of Bighorn Mountains. North side of North Fork of Crazy Woman Creek, west of Klondike, looking north, crest and higher slopes to left are Bighorns and Madison limestones, the latter also descends canyon at base of view; thin-bedded strata are Amsden formation. Johnson County, Wyoming. circa 1903, plate 39-B, with diagram, in U.S. Geological Survey. Professional paper 51. 1906. #1:/Wyoming -Professional paper 51/dnh00999 ID. Darton, N.H. 999 Form a panorama of high plain of supposed Tertiary deposits on summit of divide on Bighorn Mountains, between head of North Fork of Powder River and Canyon Creek, 10 miles west of Hazelton, looking north-northeast toward the central range. Johnson County, Wyoming. circa 1903, plate 23, as a panorama, in U.S. Geological Survey. Professional paper 51. 1906, figure 21 in U.S. Geological Survey. Folio 142. 1906. #1:/Wyoming -Professional paper 51/dnh01000 ID. Darton, N.H. 1000 Form a panorama of high plain of supposed Tertiary deposits on summit of divide on Bighorn Mountains, between head of North Fork of Powder River and Canyon Creek, 10 miles west of Hazelton, looking north-northeast toward the central range. Johnson County, Wyoming. circa 1903, plate 23, as a panorama, in U.S. Geological Survey. Professional paper 51. 1906, figure 21 in U.S. Geological Survey. Folio 142. 1906. #1:/Wyoming -Professional paper 51/dnh01001 ID. Darton, N.H. 1001 Tertiary deposits capping main divide of Bighorn Mountains, between heads of North Powder River and Canyon Creek, looking south along east side of Canyon Creek. Fine grained beds of sand and volcanic ash below, capped by boulders and sand possibly of Quaternary age. Big Horn County, Wyoming. circa 1903, plate 22-A in U.S. Geological Survey. Professional paper 51. 1906. #1:/Wyoming -Professional paper 51/dnh01002 ID. Darton, N.H. 1002 Near view of terrace deposit on Tertiary sands on Bighorn divide, east side of Canyon Creek, looking north, shows boulders and sand. Big Horn County, Wyoming. circa 1903, plate 22-B in U.S. Geological Survey. Professional paper 51. 1906. #1:/Wyoming -Professional paper 51/dnh01003 ID. Darton, N.H. 1003 North wall of Tensleep Canyon 2 miles above its mouth, west slope of Bighorn Mountains. Cliff at top of Tensleep sandstone, underlain by Amsden beds, with thick local beds of cross-bedded sandstone. Bighorn County, Wyoming. Circa 1903, plate 16-B in U.S. Geological Survey. Professional paper 51. 1906. #1:/Wyoming -Professional paper 51/dnh01005 ID. Darton, N.H. 1005 Tensleep sandstone in Tensleep Canyon, shows typical cross-bedding of upper member. Big Horn County, Wyoming. Circa 1903, plate 16-A in U.S. Geological Survey. Professional paper 51. 1906. #1:/Wyoming -Professional paper 51/dnh01011 ID. Darton, N.H. 1011 Cliff of Chugwater red beds on No Wood Creek at the mouth of Tensleep Creek, either 3 or 6 seconds, at f32 shortly after sunset. Big Horn County, Wyoming. Circa 1903, plate 1 (color) in U.S. Geological Survey. Professional paper 51. 1906. #1:/Wyoming -Professional paper 51/dnh01020 ID. Darton, N.H. 1020 Buffalo Creek canyon at Hole-in-the-Wall, shows cliffs of massive cross-bedded Tensleep sandstone, surmounted by slopes of Embar formation. Johnson County, Wyoming. circa 1903, plate 15-B in U.S. Geological Survey. Professional paper 51. 1906. #1:/Wyoming -Professional paper 51/dnh01087 ID. Darton, N.H. 1087 Madison limestone on Deadwood beds, Deep Creek, 7 miles southeast of No Wood, the man's hand is on the contact. Washakie County, Wyoming. Circa 1903, plate 13-B in U.S. Geological Survey. Professional paper 51. 1906. #1:/Wyoming -Professional paper 51/dnh01570 ID. Darton, N.H. 1570 Wall at head of cirque no. 7 at upper end of one of the tributaries of west Tensleep Creek, view from above rim showing old rounded surface. Photo by E. Blackwelder. Johnson County, Wyoming. circa 1903, plate 27-A in U.S. Geological Survey. Professional paper 51. 1906. Figure 12 in U.S. Geological Survey. Folio 142. 1906. #1:/Wyoming -Professional paper 51/dnh01571 ID. Darton, N.H. 1571 Wall at head of cirque no. 7 at upper end of one of the tributaries of west Tensleep Creek, view from below the rim, showing granite walls nearly 1,000 feet high. Photo by E. Blackwelder. Johnson County, Wyoming. circa 1903, plate 27-B in U.S. Geological Survey. Professional paper 51. 1906. Figure 13 in U.S. Geological Survey. Folio 142. 1906. #1:/Idaho-Professional paper 62/cfc00006 ID. Calkins, F.C. 6 Prichard slate near mouth of Elk Creek shows the regular bedding and banding with characteristic joint plane nearly at right angles with the bedding; cleavage is here parallel to the planes of stratification. Shoshone County, Idaho. 1904, plate 5-A in U.S. Geological Survey. Professional paper 62. 1908. #1:/Idaho-Professional paper 62/rfl00546 ID. Ransome, F.L. 546 Upper tunnels of Sullivan mine from west side of Milo Creek. The open-cut is seen above the tunnels, east of this cut the Bunker Hill fissure becomes obscure at the surface. Shoshone County, Idaho. July 31, 1904, plate 20-A in U.S. Geological Survey. Professional paper 62. 1908. #1:/Idaho-Professional paper 62/rfl00543 ID. Ransome, F.L. 543 Upper workings of Bunker Hill mine, from east side of Milo Creek. Numbers 1 to 8, on published photo beginning at extreme lower left and ending right of center on the ridge identify; Richmond tunnel, No. 3 tunnel, No. 2 tunnel, No. 1 tunnel, open cuts on Bunker Hill fissure, Stemwinder tunnel, Tyler tunnel, and point where fissure crosses the ridge. Shoshone County, Idaho. July 31, 1904, plate 20-B in U.S. Geological Survey. Professional paper 62. 1908. #1:/Idaho-Professional paper 62/rfl00548 ID. Ransome, F.L. 548 Open cut on Bunker Hill fissure, letters f, g, and h on published photo, near upper right corner, identify; f- footwall; g-crushed quartzite and gouge in the fissure; h- fissured quartzite of hanging wall. Shoshone County, Idaho. July 31, 1904, plate 21-A in U.S. Geological Survey. Professional paper 62. 1908. #1:/Idaho-Professional paper 62/rfl00552 ID. Ransome, F.L. 552 Bunker Hill fissure as exposed in second level of Last Chance mine, letters h, g, w, and f, on published photo, starting about two-thirds of the way to the right with h, and extending diagonally down to the left identify; h-hanging wall quartzite here much shattered; g-persistent dark gouge; w-(further to the right of g), white seam of crushed quartzite that usually underlies the clay gouge; and f-footwall quartzite. Shoshone County, Idaho. August 6, 1904, plate 21-B in U.S. Geological Survey. Professional paper 62. 1908. #1:/Idaho-Professional paper 62/rfl00549 ID. Ransome, F.L. 549 View looking north over the Coeur D'Alene Mountains from the Stemwinder tunnel above Wardner, shows mature dissection of plateau like uplift; town of Warder in foreground; Kellogg in the middle ground, partly concealed by the conical hill known as Haystack Peak. Shoshone County, Idaho. July 31, 1904, plate 4-A in U.S. Geological Survey. Professional paper 62. 1908. #1:/Idaho-Professional paper 62/rfl00550 ID. Ransome, F.L. 550 View looking east from Haystack Peak up the South Fork of Coeur d'Alene River toward the crest of the range, show the gradual slope and evenness of ridge lines characteristic of the western versant of the Coeur d'Alene Mountains, and terraces south of the river in the middle distance. Shoshone County, Idaho. July 31, 1904, plate 4-B in U.S. Geological Survey. Professional paper 62. 1908. #1:/Idaho-Professional paper 62/rfl00554 ID. Ransome, F.L. 554 Local folding in Wallace formation, half mile east of Wallace, shows typical thin-banded beds. Shoshone County, Idaho. August 31, 1904, plate 7-A in U.S. Geological Survey. Professional paper 62. 1908. #1:/Idaho-Professional paper 62/rfl00556 ID. Ransome, F.L. 556 Sharply folded and faulted beds of the Wallace formation, 1.5 miles east of Wallace. Shoshone County, Idaho. August 31, 1904, plate 7-B in U.S. Geological Survey. Professional paper 62. 1908. #1:/Idaho-Professional paper 62/rfl00557 ID. Ransome, F.L. 557 Typical lower beds of the Wallace formation, 1.5 miles east of Wallace, shows irregular banding with rather indistinct cleavage crossing planes of stratification, beds at this locality are sharply folded. Shoshone County, Idaho. August 31, 1904, plate 5-B in U.S. Geological Survey. Professional paper 62. 1908. #1:/Idaho-Professional paper 62/rfl00562 ID. Ransome, F.L. 562 Town of Mullan, from the west, the narrow gage railway of the Morning mine appears in the foreground. In the distance, besides the old Mullan road is the mill of the Gold Hunter mine; to the right of the river are gravel terraces. Shoshone County, Idaho. September 9, 1904, plate 3-B in U.S. Geological Survey. Professional paper 62. 1908. #1:/Idaho-Professional paper 62/rfl00568 ID. Ransome, F.L. 568 Fancy Gulch, 3 miles northwest of Murray; a typical gulch in which the recent gravels have been washed. Shoshone County, Idaho. September 1904, plate 17-B in U.S. Geological Survey. Professional paper 62. 1908. #1:/Idaho-Professional paper 62/rfl00570 ID. Ransome, F.L. 570 Parallel bed veins in Prichard slate, Golden Chest mine, showing banded structure of veins and conformity with bedding of the country rock. The lower vein is faulted, being overthrust about 3 feet, a cross stringer connects the two veins. Shoshone County, Idaho. September 24, 1904, plate 16-A in U.S. Geological Survey. Professional paper 62. 1908. #1:/Idaho-Professional paper 62/rfl00571 ID. Ransome, F.L. 571 A bed vein in Golden Chest mine, showing conformity with bedding of the slates, banding is well displayed, and in one place a layer of slate an inch or two thick occurs in the quartz. A cross stringer is visible below the vein. The apparent faulting on the right is due to foreshortening in the view, the vein dipping away from the observer. Shoshone County, Idaho. September 24, 1904, plate 16-B in U.S. Geological Survey. Professional paper 62. 1908. #1:/Idaho-Professional paper 62/rfl00574 ID. Ransome, F.L. 574 Form a panorama of the eastern part of Ophir Mountain as seen from the north, looking across Prichard Creek; the two nearly parallel blanket veins outcrop along the face of the hill, rising toward the left. The lower one is first exposed near the creek, just east of the mill shown in the lower right hand corner of the picture, and extends up through the notch in the crest of the spur. The upper one outcrops at the head pf the long chute above the mill and can be traced diagonally across the slope by the line of small dumps and cuts. Shoshone County, Idaho. September 24, 1904, plate 15, a panorama, in U.S. Geological Survey. Professional paper 62. 1908. #1:/Idaho-Professional paper 62/rfl00575 ID. Ransome, F.L. 575 Form a panorama of the eastern part of Ophir Mountain as seen from the north, looking across Prichard Creek; the two nearly parallel blanket veins outcrop along the face of the hill, rising toward the left. The lower one is first exposed near the creek, just east of the mill shown in the lower right hand corner of the picture, and extends up through the notch in the crest of the spur. The upper one outcrops at the head pf the long chute above the mill and can be traced diagonally across the slope by the line of small dumps and cuts. Shoshone County, Idaho. September 24, 1904, plate 15, a panorama, in U.S. Geological Survey. Professional paper 62. 1908. #1:/Idaho-Professional paper 62/rfl00577 ID. Ransome, F.L. 577 Ripple marks in Burke formation on Tiger Peak. Shoshone County, Idaho. September 18 1904, plate 6-A in U.S. Geological Survey. Professional paper 62. 1908. #1:/Idaho-Professional paper 62/rfl00578 ID. Ransome, F.L. 578 Bench gravels near Murray, looking west from Alder Gulch, shows old hydraulic workings and relation of the gravels to Prichard Creek, just visible at the left of the illustration. Shoshone County, Idaho. September 24, 1904, plate 6-B in U.S. Geological Survey. Professional paper 62. 1908. #1:/Idaho-Professional paper 62/rfl00580 ID. Ransome, F.L. 580 Hydraulic workings in bench gravels, Dream Gulch. The trench in the foreground is in decomposed Prichard slate. Shoshone County, Idaho. September 24, 1904, plate 17-A in U.S. Geological Survey. Professional paper 62. 1908. #1:/Idaho-Professional paper 62/rfl00583 ID. Ransome, F.L. 583 Town of Wallace, from the west, the mouth of Ninemile Creek appears on the left; beyond may be seen the valleys of Canyon Creek on the left and of the South Fork of Coeur d'Alene River on the right. Shoshone County, Idaho. 1903, plate 3-A in U.S. Geological Survey. Professional paper 62. 1908. #1:/South Dakota-Wyoming-Professional paper 65/jta00002 ID. Jaggar, T.A. 2 Typical cliff of Pahasapa limestone, mouth of Hellgate Gulch, Spearfish Canyon, 6 miles west of Englewood. Lawrence County, South Dakota, circa 1904, plate 7-B in U.S. Geological Survey. Professional paper 65. 1909. Plate 17 in U.S. Geological Survey. Folio 219, 1925. #1:/South Dakota-Wyoming-Professional paper 65/jta00003 ID. Jaggar, T.A. 3 Basal Deadwood formation on Elk Creek, boulders of quartzite and schist in yellow sandy matrix; pick for scale. Lawrence County, South Dakota, circa 1904, plate 6-A in U.S. Geological Survey. Professional paper 65. 1909. Plate 13 in U.S. Geological Survey. Folio 219, 1925. #1:/South Dakota-Wyoming-Professional paper 65/jta00018 ID. Jaggar, T.A. 18 Minnelusa sandstone on Bear Butte Creek, four miles west southwest of Sturgis, Lawrence County, South Dakota, circa 1904, plate 7-A in U.S. Geological Survey. Professional paper 65. 1909. Plate 22 in U.S. Geological Survey. Folio 219, 1925. #1:/South Dakota-Wyoming-Professional paper 65/jta00034 ID. Jaggar, T.A. 34 Typical gorge in Minnekahta limestone, invading valley of Spearfish Red shale west of Hermosa, Lawrence County, South Dakota, circa 1904, plate 8-A in U.S. Geological Survey. Professional paper 65. 1909. Plate 21 in U.S. Geological Survey. Folio 219, 1925. #1:/South Dakota-Wyoming-Professional paper 65/jta00036 ID. Jaggar, T.A. 36 Lookout Peak, near Spearfish, from the south, slope of Minnekahta limestone in foreground; Spearfish to left; peak capped by Lakota sandstone, gypsum ledges. Lawrence County, South Dakota, circa 1904, plate 9-A in U.S. Geological Survey. Professional paper 65. 1909. #1:/South Dakota-Wyoming-Professional paper 65/jta00049 ID. Jaggar, T.A. 49 Whitewood limestone below Deadwood, mouth of Smelter Gulch from upper left to middle left; Overlying shale, Englewood limestone and Pahasapa limestone. Lawrence County, South Dakota, circa 1904, plate 6-A in U.S. Geological Survey. Professional paper 65. 1909. #1:/Nevada-Professional paper 66/rfl00584 ID. Ransome, F.L. 584 Columbia Mountain; from the south, the top of the mountain is Vindicator rhyolite; the two sharp knobs at the right are silicified dacite. Dark areas near the base of the mountain are Cambrian slate. Esmeralda County, Nevada. 1905. Plate 5-A in U.S. Geological Survey. Professional paper 66. 1909. #1:/South Dakota-Wyoming-Professional paper 65/dnh00585 ID. Darton, N.H. 585 Green Mountain, from the north, a dome of Minnelusa and associated formations; probably due to buried laccolith. Crook County, Wyoming, circa 1900, plate 18 in U.S. Geological Survey. Professional paper 65. 1909. Figure 4 in U.S. Geological Survey. Folio 127. 1905. #1:/Nevada-Professional paper 66/rfl00586 ID. Ransome, F.L. 586 Cambrian shale (dark rock) cut by alaskite (light rock), south slope of Columbia Mountain. Esmeralda County, Nevada. 1905. Plate 5-B in U.S. Geological Survey. Professional paper 66. 1909. #1:/South Dakota-Wyoming-Professional paper 65/dnh00587 ID. Darton, N.H. 587 Typical tepee butte, due to limestone concretion in Pierre shale, Weston County, Wyoming, circa 1900, plate 13-A in U.S. Geological Survey. Professional paper 65. 1909. Plates 2, and 10 respectively in U.S. Geological Survey. Folio 209, printed in 1902 and Folio 85, printed in 1909. #1:/Nevada-Professional paper 66/rfl00589 ID. Ransome, F.L. 589 Pencil marks small dip in intrusive contact between Morena rhyolite and Cambrian shale, west slope of Columbia Mountain. Esmeralda County, Nevada. 1905. Plate 6-A, with sketch outlining contact, in U.S. Geological Survey. Professional paper 66. 1909. #1:/South Dakota-Wyoming-Professional paper 65/dnh00590 ID. Darton, N.H. 590 Red Butte, southwest of Boyd, Spearfish red shale, capped by 30-foot bed of gypsum. Weston County, Wyoming, circa 1900, plate 9B in U.S. Geological Survey. Professional paper 65. 1909. Figure 9 in U.S. Geological Survey. Folio 127. 1905. #1:/South Dakota-Wyoming-Professional paper 65/dnh00600 ID. Darton, N.H. 600 Chadron conglomerate south of Rapid [City], constitutes high plain crossing hogback range. Looking northwest. Pennington County, South Dakota, circa 1900, plate 14-B in U.S. Geological Survey. Professional paper 65. 1909. Plate 24 in U.S. Geological Survey. Folio 219. 1925. #1:/South Dakota-Wyoming-Professional paper 65/dnh00732 ID. Darton, N.H. 732 Devils Tower and Missouri Buttes from the northeast, slopes of Sundance formation; plateau of Lakota sandstone to right in distance. Crook County, Wyoming, circa 1900 plate 16-A in U.S. Geological Survey. Professional paper 65. 1909. #1:/South Dakota-Wyoming-Professional paper 65/dnh00773 ID. Darton, N.H. 773 Reservoir north of Belle Fourche held by small dirt dam. Custer County, South Dakota, circa 1900. Plate 20-A in U.S. Geological Survey. Professional paper 65. 1909. #1:/South Dakota-Wyoming-Professional paper 65/dnh01032 ID. Darton, N.H. 1032 Bear Butte, from the north, ridge of Pahasapa limestone to left; slope of Sundance and Spearfish formations to right. Meade County, South Dakota, circa 1900, plate 16-A in U.S. Geological Survey. Professional paper 65. 1909. Plate 27 in U.S. Geological Survey. Folio 219. 1925. #1:/South Dakota-Wyoming-Professional paper 65/dnh01036 ID. Darton, N.H. 1036 Castle Rock from the southeast. Tertiary sandstone capping Cretaceous shale, 30 miles northeast of Belle Fourche, Butte County, South Dakota, circa 1900, plate 13-B in U.S. Geological Survey. Professional paper 65. 1909. Plate 4 in U.S. Geological Survey. Folio 209. 1919. #1:/South Dakota-Wyoming-Professional paper 65/dnh01037 ID. Darton, N.H. 1037 Caving bank on Belle Fourche River, east of Snoma, wide alluvial flats in distance. Butte County, South Dakota, circa 1900 plate 20-B in U.S. Geological Survey. Professional paper 65. 1909. Plate 8 in U.S. Geological Survey. Folio 209. 1919. #1:/Nevada-Professional paper 66/rfl00592 ID. Ransome, F.L. 592 Sandstorm and Kendall mines, from Morena Ridge, north of Columbia Mountain. Esmeralda County, Nevada. 1905. Plate 13-A in U.S. Geological Survey. Professional paper 66. 1909. #1:/Nevada-Professional paper 66/rfl00590 ID. Ransome, F.L. 590 Looking eastward from Morena Ridge to Diamondfield and Black Butte. The principal mines near Diamondfield are on the ridge extending from Black Butte to the trenched summit of McMahon ridge on the left. Esmeralda County, Nevada. 1905. Plate 13-A in U.S. Geological Survey. Professional paper 66. 1909. #1:/Nevada-Professional paper 66/rfl00597 ID. Ransome, F.L. 597 Ledge outcrops in latite on Banner Mountain. Esmeralda County, Nevada. 1905. Plate 15-B in U.S. Geological Survey. Professional paper 66. 1909. #1:/Nevada-Professional paper 66/rfl00605 ID. Ransome, F.L. 605 Part of the Sweeney stope, in the Florence mine, note shattered ledge matter and absence of any regular boundary between ore and waste. Esmeralda County, Nevada. 1905. Plate 21-A in U.S. Geological Survey. Professional paper 66. 1909. #1:/Nevada-Professional paper 66/rfl00606 ID. Ransome, F.L. 606 Ledge matter on the 150-foot level of the Florence mine. Esmeralda County, Nevada. 1905. Plate 22-B in U.S. Geological Survey. Professional paper 66. 1909. #1:/Nevada-Professional paper 66/rfl00610 ID. Ransome, F.L. 610 Black Butte; from point near McLaughlin's well, a typical knob of ledge matter rising above the general rolling surface. The white dump at the base of the butte marks the portal of the main tunnel. To the right of it, extending obliquely up the slope, are the cuts on the flat vein. Nye County, Nevada. 1905. Plate 3-B in U.S. Geological Survey. Professional paper 66. 1909. #1:/Nevada-Professional paper 66/rfl00617 ID. Ransome, F.L. 617 Ledge outcrops in Milltown andesite about 2 miles east of Goldfield. Esmeralda County, Nevada. 1905. Plate 14-A in U.S. Geological Survey. Professional paper 66. 1909. #1:/Nevada-Professional paper 66/rfl00618 ID. Ransome, F.L. 618 Goldfield: from point near the Old Blue Bull shaft, characteristic ledge outcrops in foreground; Malpais Mesa behind the town; Montezuma Peak beyond, looking west. Esmeralda County, Nevada. 1905. Plate 3-A in U.S. Geological Survey. Professional paper 66. 1909. #1:/Nevada-Professional paper 66/rfl00620 ID. Ransome, F.L. 620 Ledge outcrop of dacite between the Blue Bull and Commonwealth mines, the conspicuous white dump is alunitic material from a lease on the Lone Star ground. The rough knob on the skyline near the right side of the view is Banner Mountain. Esmeralda County, Nevada. 1905. Plate 14-B in U.S. Geological Survey. Professional paper 66. 1909. #1:/Nevada-Professional paper 66/rfl00625 ID. Ransome, F.L. 625 Near view of dacitic ledge near the Blue Bull mine; showing structure. Esmeralda County, Nevada. 1905. Plate 19-B in U.S. Geological Survey. Professional paper 66. 1909. #1:/Nevada-Professional paper 66/rfl00626 ID. Ransome, F.L. 626 Dacitic ledges meeting on ridge near the Commonwealth mine. Esmeralda County, Nevada. 1905. Plate 19-A in U.S. Geological Survey. Professional paper 66. 1909. #1:/Nevada-Professional paper 66/rfl00628 ID. Ransome, F.L. 628 Ledge outcrops east of Black Cap Mountain, in the distance is Stonewall Flat with its white central playa; beyond the Cactus Range. Esmeralda County, Nevada. 1905. Plate 15-A in U.S. Geological Survey. Professional paper 66. 1909. #1:/Nevada-Professional paper 66/rfl00694 ID. Ransome, F.L. 694 The "glory hole" of the Combination mine. Esmeralda County, Nevada. 1905. Plate 22- A in U.S. Geological Survey. Professional paper 66. 1909. #1:/Nevada-Professional paper 66/rfl00688 ID. Ransome, F.L. 688 Goldfield; from Mira Mountain, the sharp peak is Columbia Mountain. The principal mines lie beyond the basalt capped hill in the right foreground. Esmeralda County, Nevada. 1905. Plate 6-B in U.S. Geological Survey. Professional paper 66. 1909. #1:/Nevada-Professional paper 66/rfl00690 ID. Ransome, F.L. 690 Malpais Mesa; from Mira Mountain, beyond the mesa is Montezuma Peak, composed largely of beds belonging to the Siebert formation. The same formation shows also in the steep slope below the basalt cap of the mesa. Esmeralda County, Nevada. 1905. Plate 11- A in U.S. Geological Survey. Professional paper 66. 1909. #1:/Nevada-Professional paper 66/rfl00691 ID. Ransome, F.L. 691 Florence Hill from the south. Esmeralda County, Nevada. 1905. Plate 11-B in U.S. Geological Survey. Professional paper 66. 1909. #1:/Nevada-Professional paper 66/rfl00692 ID. Ransome, F.L. 692 From Florence Hill looking east. Esmeralda County, Nevada. 1905. Plate 12-B in U.S. Geological Survey. Professional paper 66. 1909. #1:/Nevada-Professional paper 66/rfl00693 ID. Ransome, F.L. 693 From Florence Hill looking northwest. Esmeralda County, Nevada. 1905. Plate 12-A in U.S. Geological Survey. Professional paper 66. 1909. #1:/Colorado-Professional paper 67/ccw00225 ID. Cross, C.W. 225 South Lookout Peak, Telluride quadrangle, the characteristic topography of an area composed of rocks of the Silverton volcanic series. San Miguel County, Colorado. 1895. Plate 2 in U.S. Geological Survey. Professional paper 67. 1909. #1:/Colorado-Professional paper 67/ccw00246 ID. Cross, C.W. 246 Southern part of Silver Mountain landslide area, Telluride quadrangle. San Miguel County, Colorado. 1895. Plate 5 in U.S. Geological Survey. Professional paper 67. 1909. Figure 10 in U.S. Geological Survey. Folio 57. 1899. #1:/Colorado-Professional paper 67/ccw00333 ID. Cross, C.W. 333 Looking down landslide ridge southeast of Expectation Mountain, Rico quadrangle, shows the landslide topography at the stage when it has become almost obliterated by disintegration of the shattered blocks. Dolores County, Colorado. 1897. Plate 6-A in U.S. Geological Survey. Professional paper 67. 1909. Plate 19 in U.S. Geological Survey. 21st Annual report, part 2. 1900. #1:/Colorado-Professional paper 67/ccw00358 ID. Cross, C.W. 358 South face of Landslip Mountain, Rico quadrangle, shows several landslide blocks, mainly of porphyry, in process if disintegration by atmospheric agencies. Dolores County, Colorado. November 1898. Plate 6-B in U.S. Geological Survey. Professional paper 67. 1909. Plate 27 in U.S. Geological Survey. Professional paper 166. 1932. Plate 20 in U.S. Geological Survey. 21st Annual report, part 2. 1900. #1:/Colorado-Professional paper 67/ccw00392 ID. Cross, C.W. 392 Rock stream at head of Silver basin, Silverton quadrangle, from the northwest, the concentric wavelike ridges characteristic of many rock streams are well shown in this view. Ouray County, Colorado. 1899. Plate 12-A in U.S. Geological Survey. Professional paper 67. 1909. #1:/Colorado-Professional paper 67/ccw00393 ID. Cross, C.W. 393 Rock stream at head of Silver basin, shows the thickness of the stream at its outer edge and its sharply defined boundaries as contrasted with ordinary talus from the cliffs at the right. Ouray County, Colorado. 1899. Plate 12-B in U.S. Geological Survey. Professional paper 67. 1909. #1:/Colorado-Professional paper 67/ccw00394 ID. Cross, C.W. 394 Upper portion of rock stream in Pierson basin, Silverton quadrangle, the length of this stream from the head of the cirque to distal extremity shown in Cross photo 395 is about .75 of mile and its mean width one quarter of a mile. Ouray County, Colorado. 1899. Plate 10-A in U.S. Geological Survey. Professional paper 67. 1909. #1:/Colorado-Professional paper 67/ccw00395 ID. Cross, C.W. 395 Lower portion of rock stream in Pierson basin, Silverton quadrangle. Ouray County, Colorado. 1899. Plate 10-A in U.S. Geological Survey. Professional paper 67. 1909. #1:/Colorado-Professional paper 67/ccw00396 ID. Cross, C.W. 396 Rock stream in Pierson basin, Silverton quadrangle, looking toward the head of the stream, along its eastern edge, from a point near its foot, shows the mixture of coarse and fine material composing the rock stream, and the sharp boundary between the rock stream and the ordinary talus to the left. Ouray County, Colorado. 1899. Plate 11 in U.S. Geological Survey. Professional paper 67. 1909. #1:/Colorado-Professional paper 67/ccw00397 ID. Cross, C.W. 397 Rock stream of Imogene basin, Silverton quadrangle, near camp Bird mine. The sharp boundaries of this stream are noteworthy, as is its position at the end of the ridge shown at left of the illustration. Ouray County, Colorado. 1899. Plate 13-B in U.S. Geological Survey. Professional paper 67. 1909. #1:/Colorado-Professional paper 67/ccw00475 ID. Cross, C.W. 475 Landslide surface below Red Mountain No.2, Silverton quadrangle, shows multitude of small slide blocks with intervening trenches or depressions. The slide area extends across ridge from Red Mountain No. 2 into Corkscrew Gulch. On the left in the knoll above Paymaster mine shown Howe, E. photo 41; White Cloud and American Girl mines in foreground. Ouray County, Colorado. September 15, 1900. Plate 7-B in U.S. Geological Survey. Professional paper 67. 1909. Plate 28 in U.S. Geological Survey. Professional paper 166. 1932. Figure 6 in U.S. Geological Survey. Folio 120. 1905. #1:/Colorado-Professional paper 67/ccw00484 ID. Cross, C.W. 484 Cliffs of San Juan tuff agglomerate, east side of Hayden Mountain near Full Moo Gulch, overlooking Ironton Park, Silverton quadrangle. Ouray County, Colorado. September 11, 1900. Plate 1 in U.S. Geological Survey. Professional paper 67. 1909. #1:/Colorado-Professional paper 67/ccw00485 ID. Cross, C.W. 485 Rock stream at head of Silver basin, Silverton quadrangle, from the northeast, shows sharp definition of stream and indicates its great volume as compared with talus piles below right hand cliff. Ouray County, Colorado. September 17, 1900. Plate 13-B in U.S. Geological Survey. Professional paper 67. 1909. Plate 30 in U.S. Geological Survey. Professional paper 166. 1932. Figure 4 in U.S. Geological Survey. Folio 120. 1905. #1:/Colorado-Professional paper 67/ccw00550 ID. Cross, C.W. 550 Form a panorama of landslide and rock stream near head of Cleveland Gulch, Silverton quadrangle. A typical landslide trench separates the debris covered mass in the center of the illustration from the ridge forming the sky line back of it. Hinsdale County, Colorado. August 26, 1901. Plate 17, as a panorama, in U.S. Geological Survey. Professional paper 67. 1909. #1:/Colorado-Professional paper 67/ccw00551 ID. Cross, C.W. 551 Form a panorama of landslide and rock stream near head of Cleveland Gulch, Silverton quadrangle. A typical landslide trench separates the debris covered mass in the center of the illustration from the ridge forming the sky line back of it. Hinsdale County, Colorado. August 26, 1901. Plate 17, as a panorama, in U.S. Geological Survey. Professional paper 67. 1909. #1:/Colorado-Professional paper 67/ccw00705 ID. Cross, C.W. 705 Rock stream from east side of Sliderock Ridge, near head of Cascade Creek, Engineer Mountain quadrangle. San Juan County, Colorado. September 30, 1904. Plate 19-B in U.S. Geological Survey. Professional paper 67. 1909. Figure 3 in U.S. Geological Survey. Folio 171. 1910. #1:/Colorado-Professional paper 67/ccw00765 ID. Cross, C.W. 765 Slumgullion mud flow, San Cristobal quadrangle, seen from the west above Lake San Cristobal. Shows the flow from its source to the lake. The stream flowing along the southern border of the mud flow is now forming a small delta in the lake on the right of the illustration; the smooth slopes at either side of the mud flow are largely covered by glacial gravels. Hinsdale County, Colorado. September 22,1905. Plate 20-B in U.S. Geological Survey. Professional paper 67. 1909. Plate 32-A in U.S. Geological Survey. Professional paper 166. 193. #1:/Colorado-Professional paper 67/ccw00836 ID. Cross, C.W. 836 Engineer Mountain from the west shows rock streams on western slope of mountain. The basal contact of the intrusive trachyte may be seen on the right hand slope on the skyline; the whole of the rock stream is below this level. San Juan County, Colorado. 1906. Plate 19-A in U.S. Geological Survey. Professional paper 67. 1909. Figure 9 in U.S. Geological Survey. Folio 171. 1910. #1:/Colorado-Professional paper 67/ccw00846 ID. Cross, C.W. 846 Engineer Mountain from the east, shows lower contact of intrusive trachyte and columnar structure; the small amount of talus and absence of rock streams is noteworthy. San Juan County, Colorado. 1906. Plate 18-B in U.S. Geological Survey. Professional paper 67. 1909. Figure 8 in U.S. Geological Survey. Folio 171. 1910. #1:/Colorado-Professional paper 67/ccw00847 ID. Cross, C.W. 847 Engineer Mountain from the north, shows lower contact of trachyte inclined to the northwest, the columnar jointing, and rock stream at foot of cliff. San Juan County, Colorado. 1906. Plate 18-A in U.S. Geological Survey. Professional paper 67. 1909. Figure 7 in U.S. Geological Survey. Folio 171. 1910. #1:/Colorado-Professional paper 67/howe0036 ID. Howe, E. 36 Small pond occupying depressions on trench between landslide blocks near head of Mineral Creek, Red Mountain landslide district, Silverton quadrangle. San Juan County, Colorado. 9 a.m. September 5, 1900. Plate 7-A in U.S. Geological Survey. Professional paper 67. 1909. #1:/Colorado-Professional paper 67/howe0038 ID. Howe, E. 38 Red Mountain landslide district, Silverton quadrangle, typical landslide blocks and ridges with intervening trenches, at divide between Red Mountain and Mineral Creeks. San Juan County, Colorado. 9:45 a.m. September 5, 1900. Plate 8-A in U.S. Geological Survey. Professional paper 67. 1909. #1:/Colorado-Professional paper 67/howe0041 ID. Howe, E. 41 Details of landslide topography southeast of Corkscrew Gulch, Red Mountain district, Silverton quadrangle, the ridge sparsely covered by trees consists of rocks in place; the material in the foreground is landslide debris alone. Ouray County, Colorado. 10:50 a.m. September 14, 1900. Plate 8-B in U.S. Geological Survey. Professional paper 67. 1909. #1:/Colorado-Professional paper 67/howe0050 ID. Howe, E. 50 Rock stream in lower portion of Silver basin, Silverton quadrangle, the outer rim of lighter color than the rest of the stream consists of debris of rhyolite of the Potosi volcanic series; the rest of the detritus of dark tone was derived from andesitic rocks of the Silverton volcanic series. Ouray County, Colorado. 11 a.m. September 18, 1900. Plate 13-A in U.S. Geological Survey. Professional paper 67. 1909. #1:/Colorado-Professional paper 67/howe0051 ID. Howe, E. 51 Rock stream in lower portion of Silver basin, Silverton quadrangle, detail of surface; the outer rim of the rhyolite debris indicated in Howe photo 50, is shown on the left. Ouray County, Colorado. 1#1:30 a.m. September 18, 1900. Plate 14-A in U.S. Geological Survey. Professional paper 67. 1909. #1:/Colorado-Professional paper 67/howe0053 ID. Howe, E. 53 Rock Stream from side of ridge near head of Bear Creek, Silverton quadrangle, Ouray County, Colorado. September 22, 1900. Plate 20-A in U.S. Geological Survey. Professional paper 67. 1909. #1:/Colorado-Professional paper 67/howe0110 ID. Howe, E. 110 Rock stream at head of American basin, Silverton quadrangle. Hinsdale County, Colorado. 10 a.m. August 22, 1901. Plate 15-B in U.S. Geological Survey. Professional paper 67. 1909. #1:/Colorado-Professional paper 67/howe0123 ID. Howe, E. 123 Talus accumulations and rock stream at head of American basin, Silverton quadrangle. Hinsdale County, Colorado. 3 p.m. August 22, 1901. Plate 15-A in U.S. Geological Survey. Professional paper 67. 1909. #1:/Colorado-Professional paper 67/howe0146 ID. Howe, E. 146 Portion of rock stream in Hurricane basin, Silverton quadrangle, shows the billowy surface near its foot. Hinsdale County, Colorado. September 5, 1901. Plate 16-B in U.S. Geological Survey. Professional paper 67. 1909. #1:/Colorado-Professional paper 67/howe0233 ID. Howe, E. 233 Landslide debris on the south side of Dexter Creek near Bachelor mine, Ouray quadrangle, Ouray County, Colorado. 9 a.m., August 16, 1900. Plate 9-A in U.S. Geological Survey. Professional paper 67. 1909. #1:/California-Professional paper 73/djs0159a ID. Diller, J.S. 159a Hydraulic mine at Cherokee, Butte County, California. circa 1905. Plate 4-B in U.S. Geological Survey. Professional paper 73. 1911. #1:/California-Professional paper 73/thw00004 ID. Turner, H.W. 4 Sierra Buttes, in the Downieville quadrangle, a part of the Cretaceous divide of the Sierra Nevada, viewed from the south. Sierra County, California. 1893. Plate 18-A in U.S. Geological Survey. Professional paper 73. 1911. #1:/California-Professional paper 73/thw00010 ID. Turner, H.W. 10 Cascade Drift Mine, showing lowest gravels of the Jura River, Plumas County, California. 1893. Plate 17-B in U.S. Geological Survey. Professional paper 73. 1911. Plate 25 in 17th Annual report, U.S. Geological Survey. 1896. Figure 6 in Folio 37. 1897. #1:/California-Professional paper 73/thw00016 ID. Turner, H.W. 16 Unconformity of Neocene shore gravel on sandstone of Ione formation, Calaveras County, California. 1893. Plate 11-B in U.S. Geological Survey. Professional paper 73. 1911. Plate 51 in 14th Annual report, U.S. Geological Survey. 1894. #1:/California-Professional paper 73/thw00025 ID. Turner, H.W. 25 West spur of Mount Raymond from Indian Valley, showing rough character of ridges of andesite. Alpine County, California. Circa 1895. Plate 7-A in U.S. Geological Survey. Professional paper 73. 1911. #1:/California-Professional paper 73/thw00026 ID. Turner, H.W. 26 Vertical shearing in granite north of Charity valley. County, California. Circa 1895. Plate 7-B in U.S. Geological Survey. Professional paper 73. 1911. #1:/California-Professional paper 73/thw00028 ID. Turner, H.W. 28 Hills of andesitic tuff breccia 1.5 miles north of Bloods, Calaveras County, California. Circa 1895. Plate 6-A in U.S. Geological Survey. Professional paper 73. 1911. #1:/California-Professional paper 73/linw0310 ID. Lindgren, W. 310 Upper bench gravel at Moody mine, Gold Run, showing cross bedding. Placer County, California. Circa 1902. Plate 24-B in U.S. Geological Survey. Professional paper 73. 1911. #1:/California-Professional paper 73/linw0311 ID. Lindgren, W. 311 Looking north from road just south of Dutch Flat, the white streak in the middle is washed gravel of the main channel, the bottom of which lies 100 feet below the point of observation. Slate ridges of Camel Hump in the distance. Photograph by J.C. Hawyer. Placer County, California. Circa 1902. Plate 21-A in U.S. Geological Survey. Professional paper 73. 1911. #1:/California-Professional paper 73/linw0312 ID. Lindgren, W. 312 Hydraulic pit of Polar Star Mine, showing deep channel with coarse gravel; fine quartzose bench gravel is seen in the distance several hundred feet higher. Photograph by J.C. Hawyer. Placer County, California. Circa 1902. Plate 21-B in U.S. Geological Survey. Professional paper 73. 1911. #1:/California-Professional paper 73/linw0333 ID. Lindgren, W. 333 Hydraulic mine on east side of Butte Creek near Centerville; showing 100 feet of Tertiary gravels resting on sandstones of the Chico formation and overlain by several hundred feet of andesitic tuff. Butte County, California. Circa 1902. Plate 16-B in U.S. Geological Survey. Professional paper 73. 1911. #1:/California-Professional paper 73/linw0349 ID. Lindgren, W. 349 Hydraulic pit in Dardanelles mine, Forest Hill, bedrock of entire channel laid bare to mining. In distance is seen a rhyolitic channel crossing the early Tertiary channel. Placer County, California. Circa 1902. Photograph by J.M. Boutwell. Plate 5-B in U.S. Geological Survey. Professional paper 73. 1911. #1:/California-Professional paper 73/linw0352 ID. Lindgren, W. 352 Bench gravel on north rim of Dardanelles Channel, Placer County, California. Circa 1902. Photograph by J.M. Boutwell. Plate 5-A in U.S. Geological Survey. Professional paper 73. 1911. #1:/California-Professional paper 73/linw0354 ID. Lindgren, W. 354 Rhyolitic tuff resting on bedrock of Dardanelles Channel, Forest Hill; in the background is seen a later channel filled with andesitic tuff in a trough eroded in rhyolite. The same channel is shown in the background of Lindgren photograph 352, Photograph by J.M. Boutwell. Placer County, California. Circa 1902. Plate 24-A in U.S. Geological Survey. Professional paper 73. 1911. #1:/Colorado-Professional paper 67/tgw00007 ID. Tower, G.W. 7 Tree split by recent landslide movement, upper limit of C.H.C. Hill, illustrating the slow downward creep of soil. Dolores County, Colorado. Circa 1896. Plate 18, 21st Annual report, part 2, U.S. Geological Survey. 1901. Plate 4 in U.S. Geological Survey. Professional paper 67. 1909. #1:/New Mexico-Professional paper 68/gch00014 ID. Gordon, C.H. 14 Cliffs of rhyolite tuff in Chloride Canyon, Black Range. Sierra County, New Mexico. 1905. Plate 20-A in U.S. Geological Survey. Professional paper 68. 1910. #1:/New Mexico-Professional paper 68/gch00029 ID. Gordon, C.H. 29 Kelly mining camp, Kelly mine and dump in foreground. Elephant Butte beyond with Cat Mountain showing over the north end of the ridge; San Mateo Mountains, in the background, looking southwest from point above Kelly mine. Socorro County, New Mexico. 1905. Plate 19-A in U.S. Geological Survey. Professional paper 68. 1910. #1:/New Mexico-Professional paper 68/gch00031 ID. Gordon, C.H. 31 North entrance to Graphic mine, Kelly limestone overlain by Sandia formation; rocks inclined S. 65 degrees W. Socorro County, New Mexico. 1905. Plate 16-B in U.S. Geological Survey. Professional paper 68. 1910. #1:/New Mexico-Professional paper 68/gch00036 ID. Gordon, C.H. 36 View on Arroyo de la Parida, seven miles northeast of Socorro; characteristic forms in Palomas gravel (Pleistocene). Socorro County, New Mexico. 1905. Plate 16-B in U.S. Geological Survey. Professional paper 68. 1910. #1:/New Mexico-Professional paper 68/gch00038 ID. Gordon, C.H. 38 South side of Blue Canyon, Socorro Mountains showing flow structure in rhyolite, looking south. Socorro County, New Mexico. 1905. Plate 15-A in U.S. Geological Survey. Professional paper 68. 1910. #1:/New Mexico-Professional paper 68/gch00039 ID. Gordon, C.H. 39 Socorro Peak, main mass andesite, sedimentary (Madera limestone) at center extreme right: Torrance mine in foreground, looking northeast. Socorro County, New Mexico. 1905. Plate 14-B in U.S. Geological Survey. Professional paper 68. 1910. #1:/New Mexico-Professional paper 68/gch00046 ID. Gordon, C.H. 46 Coyote Buttes, eight miles northeast of Socorro, beds of Manzano group dipping to the northwest. Socorro County, New Mexico. 1905. Plate 14-A in U.S. Geological Survey. Professional paper 68. 1910. #1:/New Mexico-Professional paper 68/glc00047 ID. Graton, L.C. 47 Form a panorama of Taos Range, looking north from Taos. Taos County, New Mexico. 1905. Plate 5-A in U.S. Geological Survey. Professional paper 68. 1910. #1:/New Mexico-Professional paper 68/glc00048 ID. Graton, L.C. 48 Form a panorama of Taos Range, looking north from Taos. Taos County, New Mexico. 1905. Plate 5-A in U.S. Geological Survey. Professional paper 68. 1910. #1:/New Mexico-Professional paper 68/gch00051 ID. Gordon, C.H. 51 Blue Canyon, Socorro Mountains, Socorro and Rio Grande 4 miles in distance, looking east. Socorro County, New Mexico. 1905. Plate 15-B in U.S. Geological Survey. Professional paper 68. 1910. #1:/New Mexico-Professional paper 68/glc00052 ID. Graton, L.C. 52 Form a panorama of valley of Rio Grande at Glenwoody, looking north. Taos, County, New Mexico. 1905. Plate 5-B in U.S. Geological Survey. Professional paper 68. 1910. #1:/New Mexico-Professional paper 68/glc00053 ID. Graton, L.C. 53 Form a panorama of valley of Rio Grande at Glenwoody, looking north. Taos, County, New Mexico. 1905. Plate 5-B in U.S. Geological Survey. Professional paper 68. 1910. #1:/New Mexico-Professional paper 68/gch00055 ID. Gordon, C.H. 55 Magdalena Mountains, Kelly mining camp at extreme right margin (????), looking from Magdalena. Socorro County, New Mexico. 1905. Plate 16-A in U.S. Geological Survey. Professional paper 68. 1910. (Original photo/ negative badly damaged. 7-26-02 jm) #1:/New Mexico-Professional paper 68/gch00056 ID. Gordon, C.H. 56 North end of San Mateo Mountains, showing characteristic tree covered slopes, mountains composed of rhyolite flows and tuffs, view taken after slight snowfall. Socorro County, New Mexico. 1905. Plate 20-B in U.S. Geological Survey. Professional paper 68. 1910. #1:/New Mexico-Professional paper 68/glc00061 ID. Graton, L.C. 61 Santa Rita mine, showing extent of dumps, Grant County, New Mexico. 1905. Plate 22- A in U.S. Geological Survey. Professional paper 68. 1910. #1:/New Mexico-Professional paper 68/glc00066 ID. Graton, L.C. 66 Open cut, Republic mine Hanover district, Grant County, New Mexico. 1905. Plate 8-B in U.S. Geological Survey. Professional paper 68. 1910. #1:/New Mexico-Professional paper 68/glc00099 ID. Graton, L.C. 99 White Oaks, Lincoln County, New Mexico. 1905. Plate 7-A in U.S. Geological Survey. Professional paper 68. 1910. #1:/New Mexico-Professional paper 68/glc00103 ID. Graton, L.C. 103 Stope in South Homestake mine Nogal district, Lincoln County, New Mexico. 1905. Plate 7-B in U.S. Geological Survey. Professional paper 68. 1910 #1:/New Mexico-Professional paper 68/glc00108 ID. Graton, L.C. 108 Nannie Baird and I mines, Jarilla district, Otero County, New Mexico. 1905. Plate 8-A in U.S. Geological Survey. Professional paper 68. 1910. #1:/New Mexico-Professional paper 68/linw0363 ID. Lindgren, W. 363 Modoc mine and mill, Organ Mountains, dump of mine in background. Dona Ana County, New Mexico. 1905. Plate 11-A in U.S. Geological Survey. Professional paper 68. 1910. #1:/New Mexico-Professional paper 68/hjm00014 ID. Hill, J.M. 14 Sylvanite camp, looking northeast across low gap in Hachita Mountains Grant County, New Mexico. Circa 1905. Plate 22-B in U.S. Geological Survey. Professional paper 68. 1910. #1:/Montana-Professional paper 74/wwh00023 ID. Weed, W.H. 23 Sheeted granite of boulder batholith near Homestake tunnel. Jefferson County, Montana. Circa 1900. Plate 2-B in U.S. Geological Survey. Professional paper 74. 1912. #1:/Montana-Professional paper 74/wwh00024 ID. Weed, W.H. 24 General view of western part of Butte district, including the Butte. Jefferson County, Montana. Circa 1900. Plate 2-A in U.S. Geological Survey. Professional paper 74. 1912. #1:/Montana-Professional paper 74/wwh00025 ID. Weed, W.H. 25 Sheeted granite north of Meaderville, along Great Northern railway, showing weathering along joint planes, some of which are mineralized and form veins. Jefferson County, Montana. Circa 1900. Plate 5-A in U.S. Geological Survey. Professional paper 74. 1912. #1:/Montana-Professional paper 74/wwh00026 ID. Weed, W.H. 26 Disintegration boulders, in place, surrounded by soft sandy disintegrated granite, shows manner of formation of the boulders and their relation to sheeting planes of the granite. Railway cut at west portal of Homestake tunnel, east of Butte, on Northern Pacific railway. Jefferson County, Montana. Circa 1900. Plate 5-B in U.S. Geological Survey. Professional paper 74. 1912. #1:/Montana-Professional paper 74/wwh00027 ID. Weed, W.H. 27 Decomposition boulders formed by vein making agencies in granite; north crosscut, 800 foot level, Gagnon mine. Jefferson County, Montana. Circa 1900. Plate 6-A in U.S. Geological Survey. Professional paper 74. 1912. #1:/Montana-Professional paper 74/wwh00028 ID. Weed, W.H. 28 Faulted veinlets of chalcocite and quartz pyrite ore; Mountain View mine, 600 foot level, south crosscut, north vein, east vein. Jefferson County, Montana. Circa 1900. Plate 16-B in U.S. Geological Survey. Professional paper 74. 1912. #1:/Montana-Professional paper 74/wwh00029 ID. Weed, W.H. 29 Fault breccia, Mountain View mine, shows cross slips and ore boulders in north crosscut eleventh level; breccia 45 inches wide. Jefferson County, Montana. Circa 1900. Plate 17-A in U.S. Geological Survey. Professional paper 74. 1912. #1:/Montana-Professional paper 74/wwh00030 ID. Weed, W.H. 30 Mineralized joints in granite in an excavation for the foundation of a church a Butte. Jefferson County, Montana. Circa 1900. Plate 4-A in U.S. Geological Survey. Professional paper 74. 1912. #1:/Montana-Professional paper 74/wwh00031 ID. Weed, W.H. 31 Mineralization along joints in granite, Rarus mine, south crosscut, seventh level. Incipient vein formation, veinlets of quarts and pyrite. Jefferson County, Montana. Circa 1900. Plate in U.S. Geological Survey. Professional paper 74. 1912. #1:/Colorado-Professional paper 75/rfl00696 ID. Ransome, F.L. 696 Terrace gravels (Mekka Placer) on south side of French Gulch as seen from Gibson Hill. In the distance is Hoosier Pass, on the right of which is seen the even east slope of the Tenmile Range. To the left of the pass is Red Peak, composed of the ruddy beds of the Maroon and "Wyoming" formations with some sheets of porphyry, all dipping to the east. The wooded slopes of Nigger Hill occupy the middle ground. The natural channel of French Creek is hidden by the aspens in the foreground, the deep trench visible being an artificial sluice from placers to the left. Summit County, Colorado. 1909. Plate 23-A in U.S. Geological Survey. Professional paper 75. 1911. #1:/Colorado-Professional paper 75/rfl00697 ID. Ransome, F.L. 697 Breckenridge and the Tenmile Range from Gibson Hill; the distant gentle slopes on the left represent nearly surface upon which the Paleozoic sediments were deposited. Below them, near the town, is the terminal moraine on the Blue. The white dumps near it are composed of boulders from the Gold Pan elevator pit. The wooded spur is the foreground, between French Creek and Breckenridge, is composed mainly of terrace gravel. Summit County, Colorado. 1909. Plate 4-B in U.S. Geological Survey. Professional paper 75. 1911. #1:/Colorado-Professional paper 75/rfl00699 ID. Ransome, F.L. 699 Terrace gravels with Banner hydraulic workings on the west side of the Blue. The view is from Gibson Hill near the abandoned Kellogg mine. In the distance is the Tenmile Range. To the left of the placer is Cucumber Gulch. The tunnels just to the left of the mouth of Cucumber Gulch belong to the Iron Mask mine. Summit County, Colorado. 1909. Plate 14-B in U.S. Geological Survey. Professional paper 75. 1911. #1:/Colorado-Professional paper 75/rfl00704 ID. Ransome, F.L. 704 Part of the Seminole open stope from the south, the illustration show the irregular fissuring of the porphyry and the absence of any distinct vein of individually workable size. Summit County, Colorado. 1909. Plate 29-B in U.S. Geological Survey. Professional paper 75. 1911. #1:/Colorado-Professional paper 75/rfl00706 ID. Ransome, F.L. 706 View north down the valley of the Blue from a point near the mouth of French Gulch. The camera was set on the surface of the valley train. The willows in the foreground are growing on recent alluvium in the trench of the present stream. Beyond them is the valley train terrace, approximately on a level with the camera, and behind that is the older bench formed by the terrace gravels. Summit County, Colorado. 1909. Plate 13-A in U.S. Geological Survey. Professional paper 75. 1911. #1:/Colorado-Professional paper 75/rfl00707 ID. Ransome, F.L. 707 View south up the valley of the Blue from the roadside three-quarters of a mile north of Breckenridge, in the foreground is the nearly level boulder strewn surface of the valley train. On the right is Shock Hill. The distant peak is Red Mountain, east of Hoosier Pass. Summit County, Colorado. 1909. Plate 14-A in U.S. Geological Survey. Professional paper 75. 1911. #1:/Colorado-Professional paper 75/rfl00710 ID. Ransome, F.L. 710 Nearer view of the basal division of terrace gravels illustrated in photo 711, showing the roundness and decomposition of the boulders. The notebook (about center) is 8 inches long. A characteristic crumbling granitic boulder is about a foot to the right of the book. Summit County, Colorado. 1909. Plate 15-B in U.S. Geological Survey. Professional paper 75. 1911. #1:/Colorado-Professional paper 75/rfl00711 ID. Ransome, F.L. 711 Terrace gravels of the Banner placer, 1 mile north of Breckenridge. Rounded gravels in the lower layers (partly covered by loose detritus), above these are some sandy layers and then coarse subangular material. Summit County, Colorado. 1909. Plate 15-A in U.S. Geological Survey. Professional paper 75. 1911. #1:/Colorado-Professional paper 75/rfl00721 ID. Ransome, F.L. 721 Near view of a bank in the Gold Run placers, note the angular form of the fragments. The bank is about 40 feet high. Summit County, Colorado. 1909. Plate 16-B in U.S. Geological Survey. Professional paper 75. 1911. #1:/Colorado-Professional paper 75/rfl00724 ID. Ransome, F.L. 724 Mount Guyot from Lincoln Park, the flat alluvial surface of the "park" is shown in the foreground. Beyond it is French Gulch, the main branch of which turns to right of Mount Guyot. The lower slopes of the peak are shale, but the upper part, extending down nearly to timberline is porphyry. Summit County, Colorado. 1909. Plate 5-A in U.S. Geological Survey. Professional paper 75. 1911. #1:/Colorado-Professional paper 75/rfl00727 ID. Ransome, F.L. 727 Bank of the Gold Pan pit, showing character of deep gravels along the Blue; the pit is nearly 90 feet deep and probably not more than 20 to 30 feet of the gravel is here exposed. Note large size of boulders and lack of stratification. Summit County, Colorado. 1909. Plate 18-A in U.S. Geological Survey. Professional paper 75. 1911. #1:/Colorado-Professional paper 75/rfl00728 ID. Ransome, F.L. 728 Boulders from the Gold Pan pit, some of these are 6 feet long. Summit County, Colorado. 1909. Plate 18-B in U.S. Geological Survey. Professional paper 75. 1911. #1:/Colorado-Professional paper 75/rfl00729 ID. Ransome, F.L. 729 French Gulch from Farncomb Hill, in the distance is Tenmile Range. The bold eminence to right is Mineral Hill. Just under it is the nearly deserted settlement of Lincoln, and across the gulch on the left is the old Jeff Davis placer. On the dark wooded slope behind it, which leads up to Bald Mountain, at a point where the trees along the crest appear thinner than elsewhere, are the Sallie Barber and Little Sallie Barber mines. Summit County, Colorado. 1909. Plate 5-B in U.S. Geological Survey. Professional paper 75. 1911. #1:/Colorado-Professional paper 75/rfl00731 ID. Ransome, F.L. 731 View from Farncomb Hill eastward up the Middle Swan toward Swandyke and the continental divide. In the foreground are the old placer workings of American Gulch. The bedrock is Upper Cretaceous shale, which dips toward the pre-Cambrian rocks of the distant snow covered mountains. Summit County, Colorado. 1909. Plate 17-B in U.S. Geological Survey. Professional paper 75. 1911. #1:/Colorado-Professional paper 75/rfl00735 ID. Ransome, F.L. 735 Breckenridge and the Tenmile Range from Little Mountain, the view is northwest. Directly behind the town is Shock Hill, and along the west side of the Blue may be seen the light scars of hydraulic workings in the terrace gravels. The low, rounded hill in the distance, just to the left of the tree is of Dakota quartzite lapping up on the pre-Cambrian west of Braddocks. Summit County, Colorado. 1909. Plate 23-B in U.S. Geological Survey. Professional paper 75. 1911. #1:/Colorado-Professional paper 75/rfl00736 ID. Ransome, F.L. 736 Upper valley of the Blue, with terminal moraine in the fore and middle grounds, the view is south, from Little Mountain. In the foreground is the present channel of the river through the moraine. Back of the moraine is the little area of level silt known as the Goose Pasture. Hoosier Pass is visible in the distance. Summit County, Colorado. 1909. Plate 17-A in U.S. Geological Survey. Professional paper 75. 1911. #1:/Colorado-Professional paper 75/rfl00739 ID. Ransome, F.L. 739 Tenmile Range from road about a mile north of Boreas. View is across the valley of the Blue and shows the peaks and cirques just north of the head of the stream. Quandary Peak appears at the left. Summit County, Colorado. 1909. Plate 4-A in U.S. Geological Survey. Professional paper 75. 1911. #1:/Colorado-Professional paper 75/rfl00742 ID. Ransome, F.L. 742 Farncomb Hill from the north. The steep ridge in distance is Bald Mountain, separated from Farncomb Hill by French Gulch. The productive part of the hill as regards the rich gold veins extends from the Ontario shaft house, just visible on the crest to the right, diagonally down the hill to Dry Gulch, which is the small ravine on the extreme left. The first group of dumps east of the Ontario marks the workings of the Key West and Boss mines. In the larger area to the east of these, denuded of trees and covered with dumps, are the workings of the Wapiti group. Below the Ontario and Key West may be seen the old placer workings at the head of Georgia Gulch. Summit County, Colorado. 1909. Plate 27-B in U.S. Geological Survey. Professional paper 75. 1911. #1:/Utah-Professional paper 77/bjm00044 ID. Boutwell, J.M. 44 Stope on bed of carbonate ore between definite walls of siliceous limestone, just below 700-foot level, Silver King mine, looking west. Summit County, Utah. Circa 1904. Plate 34-B in U.S. Geological Survey. Professional paper 77. 1912. #1:/Utah-Professional paper 77/bjm00045 ID. Boutwell, J.M. 45 (This photograph is on the website created before FY-04!!) Bed of rich banded carbonates ore between clean siliceous walls; on 750-foot level north, Silver King mine, looking east. Summit County, Utah. Circa 1904. Plate 34-A in U.S. Geological Survey. Professional paper 77. 1912. #1:/Utah-Professional paper 77/bjm00046 ID. Boutwell, J.M. 46 (This photograph is on the website created before FY-04!!) General zone of fracturing without distinct walls, "gold ledge" 10 feet above 900 foot level west Silver King mine, looking southwest. Summit County, Utah. Circa 1904. Plate 30-A in U.S. Geological Survey. Professional paper 77. 1912. #1:/Utah-Professional paper 77/bjm00049 ID. Boutwell, J.M. 49 (This photograph is on the website created before FY-04!!) Face of rich galena ore in "gash" vein over distinct footwall fissure, on Malloy level, looking southwest. Summit County, Utah. Circa 1904. Plate 44-B in U.S. Geological Survey. Professional paper 77. 1912. #1:/Utah-Professional paper 77/bjm00050 ID. Boutwell, J.M. 50 (This photograph is on the website created before FY-04!!) Tongues of diorite porphyry extending upward into calcareous beds, metamorphosing, shattering and mineralizing them, on 1,100 foot level, McCormick crosscut Silver King mine, looking southeast. Summit County, Utah. Circa 1904. Plate 23-B in U.S. Geological Survey. Professional paper 77. 1912. #1:/Utah-Professional paper 77/bjm00052 ID. Boutwell, J.M. 52 (This photograph is on the website created before FY-04!!) Ores in Silver King mine. beds of rich ore, carrying lead and copper, in Weber quartzite adjacent to fissure, on 1,200-foot level, looking east. Summit County, Utah. Circa 1904. Plate 44-A in U.S. Geological Survey. Professional paper 77. 1912. #1:/Utah-Professional paper 77/bjm00054 ID. Boutwell, J.M. 54 (This photograph is on the website created before FY-04!!) Contact between Weber quartzite and overlying limestone of Park City formation. Contact, which is apparently conformable, is marked by head of pick, on 900 foot level, Daly-West mine, looking east. Summit County, Utah. Circa 1904. Plate 23-A in U.S. Geological Survey. Professional paper 77. 1912. #1:/Utah-Professional paper 77/bjm00133 ID. Boutwell, J.M. 133 Form a panorama. Park City monocline shows monoclinal structure of sedimentary formations. Weber quartzite in foreground, Park City formation capping first spur. Thaynes formation on the second and third cuestas, and heavy Triassic sandstone forming the prominent cuesta in the right background, all dipping northwest. Park City in middle ground; Ontario mill in left foreground, and Silver King mine and Crescent Ridge in left background, looking southwest. Summit County, Utah. Circa 1904. Plate 4-A in U.S. Geological Survey. Professional paper 77. 1912. #1:/Utah-Professional paper 77/bjm0133a ID. Boutwell, J.M. 133a Form a panorama. Park City monocline shows monoclinal structure of sedimentary formations. Weber quartzite in foreground, Park City formation capping first spur. Thaynes formation on the second and third cuestas, and heavy Triassic sandstone forming the prominent cuesta in the right background, all dipping northwest. Park City in middle ground; Ontario mill in left foreground, and Silver King mine and Crescent Ridge in left background, looking southwest. Summit County, Utah. Circa 1904. Plate 4-A in U.S. Geological Survey. Professional paper 77. 1912. #1:/Utah-Professional paper 77/bjm0133b ID. Boutwell, J.M. 133b Form a panorama. Park City monocline shows monoclinal structure of sedimentary formations. Weber quartzite in foreground, Park City formation capping first spur. Thaynes formation on the second and third cuestas, and heavy Triassic sandstone forming the prominent cuesta in the right background, all dipping northwest. Park City in middle ground; Ontario mill in left foreground, and Silver King mine and Crescent Ridge in left background, looking southwest. Summit County, Utah. Circa 1904. Plate 4-A in U.S. Geological Survey. Professional paper 77. 1912. #1:/Utah-Professional paper 77/bjm00135 ID. Boutwell, J.M. 135 Slope traversed by fault, marked by ledges of quartzite in footwall under limestone of Thaynes formation on north. Looking east northeast, down McHenry Canyon, Hawkeye dump in left background; Liberty tunnel at right. Wasatch County, Utah. Circa 1904. Plate 19-A in U.S. Geological Survey. Professional paper 77. 1912. #1:/Utah-Professional paper 77/bjm00137 ID. Boutwell, J.M. 137 Basal contact of andesite with sandstone of the Thaynes formation, exposure along wall of tunnel northeast of Park City district, water worn pebbles enclosed at base of tuffaceous material. Summit County, Utah. Circa 1904. Plate 10-B in U.S. Geological Survey. Professional paper 77. 1912. #1:/Utah-Professional paper 77/bjm00139 ID. Boutwell, J.M. 139 Cropping of zone at "Discovery," between quartzite walls, looking northeast. Summit County, Utah. Circa 1904. Plate 32-A in U.S. Geological Survey. Professional paper 77. 1912. #1:/Utah-Professional paper 77/bjm00140 ID. Boutwell, J.M. 140 (This photograph is on the website created before FY-04!!) Barren zone of strong fracturing in quartzite in main Ontario zone, 1,500-foot level Ontario mine, looking northeast. Summit County, Utah. Circa 1904. Plate 30-B in U.S. Geological Survey. Professional paper 77. 1912. #1:/Utah-Professional paper 77/bjm00142 ID. Boutwell, J.M. 142 (This photograph is on the website created before FY-04!!) Daly West mine: office, shaft and mill in middle ground; Daly-Judge shaft in background at center, Diamond-Nimrod shaft at right, looking southwest. Summit County, Utah. Circa 1904. Plate 41-B in U.S. Geological Survey. Professional paper 77. 1912. #1:/Utah-Professional paper 77/bjm00143 ID. Boutwell, J.M. 143 (This photograph is on the website created before FY-04!!) Silver King mine: shaft and office at left, sampler in middle, mill at right, looking southwest. Summit County, Utah. Circa 1904. Plate 41-A in U.S. Geological Survey. Professional paper 77. 1912. #1:/Utah-Professional paper 77/bjm00144 ID. Boutwell, J.M. 144 (This photograph is on the website created before FY-04!!) Stope on 4-foot bed of rich ore conformable with sedimentary beds as walls; C stope above C drift, Daly West mine, looking southwest. Summit County, Utah. Circa 1904. Plate 33-A in U.S. Geological Survey. Professional paper 77. 1912. #1:/Utah-Professional paper 77/bjm00145 ID. Boutwell, J.M. 145 (This photograph is on the website created before FY-04!!) Stopes on bedded ore, barren bed "parting quartzite" between upper 15-foot stope and lower 6-foot stope on bedded ore; C stope, Daly West mine, looking south. Summit County, Utah. Circa 1904. Plate 33-B in U.S. Geological Survey. Professional paper 77. 1912. #1:/Utah-Professional paper 77/bjm00146 ID. Boutwell, J.M. 146 (This photograph is on the website created prior to FY-04!!) Lateral moraine ponding Lady Morgan lakes, looking northwest. Daly-Judge office and bunkhouse at left. Summit County, Utah. Circa 1904. Plate 9-B in U.S. Geological Survey. Professional paper 77. 1912. #1:/Utah-Professional paper 77/bjm00147 ID. Boutwell, J.M. 147 Fault on surface, immediately east of Hawkeye shaft, between fractured massive limestone in hanging wall and brecciated Weber quartzite and limestone underneath, looking west. Wasatch County, Utah. Circa 1904. Plate 19-B in U.S. Geological Survey. Professional paper 77. 1912. #1:/Utah-Professional paper 77/bjm00149 ID. Boutwell, J.M. 149 (This photo is on the website created prior to FY 04!) Massachusetts fault, crossing from Massachusetts shaft, at the left, to the right; ledges along the lower right hand side of the gulch are Weber quartzite north of fault. Alliance tunnel in right foreground, Daly-Judge tunnel at left; Crescent Ridge in left background, looking southwest along Walker and Webster Gulch. Summit County, Utah. Circa 1904. Plate 17-B in U.S. Geological Survey. Professional paper 77. 1912. #1:/Utah-Professional paper 77/bjm00150 ID. Boutwell, J.M. 150 Crescent fault, limestone of Thaynes formation at left, truncated on the north and offset to the west, continuing northward in Crescent Ridge at right background. Looking southwest across Empire Canyon and Walker and Webster Gulch. Summit County, Utah. Circa 1904. Plate 17-A in U.S. Geological Survey. Professional paper 77. 1912. #1:/Utah-Professional paper 77/bjm00151 ID. Boutwell, J.M. 151 Glacial striae on roche moutonees of diorite, eastern slope of Clayton Peak, in upper Bonanza Flat. Wasatch County, Utah. Circa 1904. Plate 8-B in U.S. Geological Survey. Professional paper 77. 1912. #1:/Utah-Professional paper 77/bjm00160 ID. Boutwell, J.M. 160 Form a panorama. Clayton Peak diorite stock, diorite encircled by metamorphosed sediments lying to the right of Brighton Gap in right foreground and to left of the gap at left. Glacial topography (cirques, roche moutonees and moraines) developed on diorite. Summit County, Utah. Circa 1904. Plate 4-B in U.S. Geological Survey. Professional paper 77. 1912. #1:/Utah-Professional paper 77/bjm00161 ID. Boutwell, J.M. 161 Form a panorama. Clayton Peak diorite stock, diorite encircled by metamorphosed sediments lying to the right of Brighton Gap in right foreground and to left of the gap at left. Glacial topography (cirques, roche moutonees and moraines) developed on diorite. Summit County, Utah. Circa 1904. Plate 4-B in U.S. Geological Survey. Professional paper 77. 1912. #1:/Utah-Professional paper 77/bjm00162 ID. Boutwell, J.M. 162 Form a panorama. Clayton Peak diorite stock, diorite encircled by metamorphosed sediments lying to the right of Brighton Gap in right foreground and to left of the gap at left. Glacial topography (cirques, roche moutonees and moraines) developed on diorite. Summit County, Utah. Circa 1904. Plate 4-B in U.S. Geological Survey. Professional paper 77. 1912. #1:/Utah-Professional paper 77/bjm00173 ID. Boutwell, J.M. 173 Ground cut by southward continuation of overthrust fault, north slope of McHenry Canyon, limestone of Thaynes formation at right; diorite porphyry at left looking north. Wasatch County, Utah. Circa 1904. Plate 18-B in U.S. Geological Survey. Professional paper 77. 1912. #1:/Utah-Professional paper 77/bjm00179 ID. Boutwell, J.M. 179 Bedded structure in andesitic flows and breccias, north of mouth of Ontario drain tunnel, looking north. Summit County, Utah. Circa 1904. Plate 10-A in U.S. Geological Survey. Professional paper 77. 1912. #1:/Utah-Professional paper 77/bjm00186 ID. Boutwell, J.M. 186 Mines in upper Ontario Canyon, Ontario mine in middle ground, shaft No. 2 at left, shaft No. 3 at right, Wabash shaft in center. In background Naildriver shaft at right, New York shaft at left, looking southeast. Summit County, Utah. Circa 1904. Plate 38-B in U.S. Geological Survey. Professional paper 77. 1912. #1:/Utah-Professional paper 77/bjm00195 ID. Boutwell, J.M. 195 Ontario fracture zone on 1,700-foot level, between well defined walls of limestone and porphyry, looking southwest. Summit County, Utah. Circa 1904. Plate 32-B in U.S. Geological Survey. Professional paper 77. 1912. #1:/Utah-Professional paper 77/bjm00214 ID. Boutwell, J.M. 214 Main fault marked by gully at left and subsidiary fault by gully at right. Central spur culminating in peak is on limestone of Park City formation overlooking Woodside shale and limestone of Thaynes formation at left, looking southeast. Summit County, Utah. Circa 1904. Plate 18-A in U.S. Geological Survey. Professional paper 77. 1912. #1:/Utah-Professional paper 77/bjm00220 ID. Boutwell, J.M. 220 Ponding by ground and frontal moraines at east end of Bonanza Flat, looking southwest toward main divide of Wasatch Range. In background Timpanogos Peak and at left Provo Peaks. Wasatch County, Utah. Circa 1904. Plate 9-A in U.S. Geological Survey. Professional paper 77. 1912. #1:/Utah-Professional paper 77/bjm00231 ID. Boutwell, J.M. 231 Glaciated canyon U-shaped profile and amphitheaters at head of Thaynes Canyon, looking south. Summit County, Utah. Circa 1904. Plate 8-A in U.S. Geological Survey. Professional paper 77. 1912. #1:/Utah-Professional paper 80/bbs00004 ID. Butler, B.S. 4 Form a panorama of Quartzite Mountain from the east. Beaver County, Utah. 1908. Plate 4-A in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00005 ID. Butler, B.S. 5 Form a panorama of Quartzite Mountain from the east. Beaver County, Utah. 1908. Plate 4-A in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00007 ID. Butler, B.S. 7 Form a panorama of San Francisco Range from the east. Beaver County, Utah. 1908. Plate 2-B in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00008 ID. Butler, B.S. 8 Form a panorama of San Francisco Range from the east. Beaver County, Utah. 1908. Plate 2-B in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00009 ID. Butler, B.S. 9 Form a panorama of San Francisco Range from the east. Beaver County, Utah. 1908. Plate 2-B in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00010 ID. Butler, B.S. 10 Form a panorama of San Francisco Range from the east. Beaver County, Utah. 1908. Plate 2-B in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00012 ID. Butler, B.S. 12 Form a panorama of San Francisco Range from the west. Beaver County, Utah. 1908. Plate 2-A in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00013 ID. Butler, B.S. 13 Form a panorama of San Francisco Range from the west. Beaver County, Utah. 1908. Plate 2-A in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00014 ID. Butler, B.S. 14 Form a panorama of San Francisco Range from the west. Beaver County, Utah. 1908. Plate 2-A in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00015 ID. Butler, B.S. 15 Form a panorama of San Francisco Range from the west. Beaver County, Utah. 1908. Plate 2-A in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00016 ID. Butler, B.S. 16 Form a panorama of San Francisco Range from the west. Beaver County, Utah. 1908. Plate 2-A in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00017 ID. Butler, B.S. 17 Form a panorama of San Francisco Range from the west. Beaver County, Utah. 1908. Plate 2-A in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00027 ID. Butler, B.S. 27 O.K. Mine, Beaver Lake district. Beaver County, Utah. 1908. Plate 8-A in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00030 ID. Butler, B.S. 30 The Big Wash, typical of recent stream cutting, Rocky Range in background. Beaver County, Utah. 1908. Plate 3-A in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs0036a ID. Butler, B.S. 36a Horn Silver Mine and village of Frisco; contact of quartz monzonite and limestone in the low saddle, Squaw Springs Pass at left Beaver County, Utah. 1908. Plate 28-A in U.S. Geological Survey. Professional paper 80. 1913. Plate 41-A in U.S. Geological Survey. Professional paper 111. 1920. #1:/Utah-Professional paper 80/bbs00038 ID. Butler, B.S. 38 Silicified "reef" south of Carbonate Mine. Beaver County, Utah. 1908. Plate 7-B in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00042 ID. Butler, B.S. 42 Quartzite Mountain from the west. Beaver County, Utah. 1908. Plate 4-B in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00043 ID. Butler, B.S. 43 Outcrop of Cactus Ore body: view looking east from New Year's shaft. Beaver County, Utah. 1908. Plate 5-A in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00044 ID. Butler, B.S. 44 Outcrop of Cactus Ore body: view looking west from a point near Comet Mine. Beaver County, Utah. 1908. Plate 5-B in U.S. Geological Survey. Professional paper 80. 1913. Plate 41-B in U.S. Geological Survey. Professional paper 111. 1920. #1:/Utah-Professional paper 80/bbs00045 ID. Butler, B.S. 45 Glory hole, Cactus Mine, Beaver County, Utah. 1908. Plate 17-B in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00049 ID. Butler, B.S. 49 Breccia ore, Cactus Gulch, Beaver County, Utah. 1908. Plate 17-A in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00052 ID. Butler, B.S. 52 Contact altered limestone, Loeber Gulch; garnetized limestone showing original banding. Utah. 1908. Plate 8-B in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00053 ID. Butler, B.S. 53 Indian Grave Peak, silicified "reef" near view. Beaver County, Utah. 1908. Plate 7-A in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00061 ID. Butler, B.S. 61 Beaver Lake Mountains from the base of the San Francisco Range. Beaver County, Utah. 1908. Plate 3-B in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00078 ID. Butler, B.S. 78 Photomicrograph: quartz monzonite of Cactus area, cross nicols. Utah. 1908. Plate 6-A, enlarged 30 diameters, in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00079 ID. Butler, B.S. 79 Photomicrograph: altered quartz monzonite of Cactus area, felted areas sercicite, clear area quartz. Utah. 1908. Plate in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00080 ID. Butler, B.S. 80 Sample of breccia ore, Copper Gulch, dark areas tourmaline, light gray areas altered quartz monzonite. Beaver County, Utah. 1908. Plate 18, natural size, in U.S. Geological Survey. Professional paper 80. 1913. Plate 17-C in U.S. Geological Survey. Professional paper 111. 1920. #1:/Utah-Professional paper 80/bbs00081 ID. Butler, B.S. 81 Crystalline mineral: specimen of tetrahedral crystals of chalcopyrite, Cactus Mine, dark areas tourmaline, light areas quartz monzonite. Utah. 1908. Plate 11-C, natural size, in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00082 ID. Butler, B.S. 82 Photomicrograph: hematite inclosed in quartz, siderite, and pyrite, Cactus Mine; light areas quartz, gray areas siderite, irregular black areas, pyrite, lath-shaped bodies hematite. Utah. 1908. Plate 14-B, enlarged 30 diameters, in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00083 ID. Butler, B.S. 83 Crystalline mineral: quartz crystal, Cactus Mine. Utah. 1908. Plate 11-A, natural size, in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00084 ID. Butler, B.S. 84 Crystalline mineral: photomicrograph of tourmaline in quartz, Cactus Mine. Utah. 1908. Plate 11-B, enlarged 30 diameters, in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00085 ID. Butler, B.S. 85 Example of anhydrite and gypsum, from Cactus Mine: hand specimen, white crystalline material anhydrite, dark areas sulphides, gray mottled areas, altered quartz monzonite. Utah. 1908. Plate 13-A in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00086 ID. Butler, B.S. 86 Example of anhydrite and gypsum, from Cactus Mine: anhydrite altering to gypsum, dark-gray areas along cleavage, gypsum. Utah. 1908. Plate 13-B in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00088 ID. Butler, B.S. 88 Example of anhydrite and gypsum, from Cactus Mine: groundmass gypsum, bright areas sulphides, and duller areas anhydrite. Utah. 1908. Plate 13-C in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00089 ID. Butler, B.S. 89 Photomicrograph: anhydrite altering to gypsum Cactus Mine, Utah. 1908. Plate 14-A, with graphics identifying minerals, in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00090 ID. Butler, B.S. 90 Example of anhydrite and gypsum, from Cactus Mine: Gypsum altered from anhydrite; light area gypsum, dark areas chalcopyrite. Utah. 1908. Plate 13-D in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00091 ID. Butler, B.S. 91 Example of contact quartz monzonite and altered limestone, Imperial Mine: hand specimen, dark area, garnetized limestone, light areas to left, quartz monzonite; band between, transition zone. Utah. 1908. Plate 10-A in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00092 ID. Butler, B.S. 92 Example of contact quartz monzonite and altered limestone, Imperial Mine: photomicrograph; quartz monzonite on left, garnetized limestone on right, veinlet crossing slide is composed of quartz, feldspar and magnetite. Ordinary light. Utah. 1908. Plate 10-B, enlarged 30 diameters, in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00093 ID. Butler, B.S. 93 Contact minerals, from Washington Mine: specimen galena, garnet, and tremolite replacing limestone; light gray areas tremolite, dark gray areas garnet, black spots grains of galena. Utah. 1908. Plate 34-B in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00094 ID. Butler, B.S. 94 Specimen of iron oxide with pyrite and chalcopyrite: chalcopyrite and pyrite inclosed in iron oxide, which has general structure of hematite but is strongly magnetic. Utah. 1908. Center portion is plate 33-C, enlarged 3 diameters, in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00095 ID. Butler, B.S. 95 Specimen of iron oxide with pyrite and chalcopyrite: veins of iron oxides and sulphides in crushed garnetized limestone, Imperial Mine; light areas metallic minerals. Utah. 1908. Plate 33-B, three-fourths natural size, in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00096 ID. Butler, B.S. 96 Specimen of iron oxide with pyrite and chalcopyrite: vein of magnetite in pyrite, from Peacock copper mine; dark areas magnetite. Utah. 1908. Plate 33-A, three-fourths natural size, in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00097 ID. Butler, B.S. 97 Specimen of metamorphic products: banded limestone, Loeber Gulch. Utah. 1908. Plate 9-C in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00098 ID. Butler, B.S. 98 Specimen of metamorphic products: garnetized limestone, Loeber Gulch showing original banding. Utah. 1908. Plate 9-B, natural size, in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00099 ID. Butler, B.S. 99 Photomicrograph: showing intergrowth of fluorite and muscovite, Moscow Mine. Light areas muscovite, dark areas fluorite, crossed nicols. Utah. 1908. Plate 12-B, enlarged 30 diameters, in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00102 ID. Butler, B.S. 102 Contact minerals, from Washington Mine: photomicrograph showing intergrowth of tremolite and galena; light areas tremolite, dark areas galena. Utah. 1908. Plate 34-C, enlarged 20 diameters, in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00103 ID. Butler, B.S. 103 Contact minerals, from Washington Mine: photomicrograph of galena, garnet and muscovite replacing limestone; dark areas galena, dark-gray areas garnet, light areas to muscovite; mineral showing cleavage calcite. Utah. 1908. Plate 34-A, enlarged 20 diameters, in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00104 ID. Butler, B.S. 104 Ore from Carbonate Mine: hand specimen, showing ore and gangue minerals surrounding breccia fragments. Utah. 1908. Plate 20-A, natural size, in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00105 ID. Butler, B.S. 105 Ore from Carbonate Mine: photomicrograph specimen showing, unaltered biotite, grains of galena in biotite associated with quartz; altered hornblende crystal; vein of galena with gangue of quartz. Beaver County, Utah. 1908. Plate 20-B, with graphic, and enlarged 30 diameters, in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00106 ID. Butler, B.S. 106 Photomicrograph: serpentine in limestone, from near contact east of Michigan Mine. Probably alteration of diopside, the expansion in alteration has fractured the carbonate grains and the serpentine has filled the fissure. White areas serpentine, gray areas carbonate. Utah. 1908. Plate 12-A, enlarged 30 diameters, in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00107 ID. Butler, B.S. 107 Photomicrograph: plumbojarosite, Moscow Mine. Utah. 1908. Plate 15-A, enlarged 45 diameters, in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00109 ID. Butler, B.S. 109 Photomicrograph: oxidation of chalcopyrite, O.K. Mine. Dark areas hydrous iron oxide, light margins undetermined sulphate (?), light-gray areas unaltered chalcopyrite. Beaver County, Utah. 1908. Plate 21-B, enlarged 180 diameters, in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00110 ID. Butler, B.S. 110 Covellite replacing chalcopyrite, specimen enlarged 3.5 diameters from O.K. mine. Utah. 1908. Plate 21-A, in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00111 ID. Butler, B.S. 111 Photomicrograph: alteration minerals, from O.K. and Horn Silver Mines, same specimen as Butler photo 112, enlarged 210 diameters. Utah. 1908. Portion is plate 22-B in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00112 ID. Butler, B.S. 112 Photomicrograph: alteration minerals, from O.K. and Horn Silver Mines, covellite - replacing chalcopyrite, O.K. Mine. Utah. 1908. Plate 22-A, enlarged 40 diameters, in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00113 ID. Butler, B.S. 113 Specimen of breccia ore: Horn Silver Mine; low-grade ore, light areas country rock, dark areas largely sulphides. Beaver County, Utah. 1908. Plate 19-A, at three-quarters natural size, in U.S. Geological Survey. Professional paper 80. 1913. Plate 17-B in U.S. Geological Survey. Professional paper 111. 1920. #1:/Utah-Professional paper 80/bbs00114 ID. Butler, B.S. 114 Specimen of breccia ore: Horn Silver Mine; high-grade ore, light areas country rock, dark areas largely sulphides. Beaver County, Utah. 1908. Plate 19-B, at three-quarters natural size, in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00115 ID. Butler, B.S. 115 Photomicrograph: antimonial lead ore, Horn Silver Mine, showing intergrowth of two minerals, possibly galena and antimony mineral. Utah. 1908. Plate 15-B, enlarged 275 diameters, in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00116 ID. Butler, B.S. 116 Photomicrograph: pyrite in gangue of quartz and barite, Horn Silver Mine; pyrite incloses abundant quartz. Utah. 1908. Plate 23-A, enlarged 40 diameters, in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00117 ID. Butler, B.S. 117 Specimen of covellite replacing zinc sulphides, from Horn Silver Mine; zinc sulphides in center, surrounded by zone covellite, containing considerable unreplaced zinc sulphide, collected by D.P. Rolfing. Utah. 1908. Plate 24-B in U.S. Geological Survey. Professional paper 80. 1913. Plate 23-C in U.S. Geological Survey. Professional paper 111. 1920. #1:/Utah-Professional paper 80/bbs00120 ID. Butler, B.S. 120 Photomicrograph: alteration minerals, from O.K. and Horn Silver Mines, galena partly replaced by covellite and sulphates, Horn Silver Mine; dark-gray areas partly covellite and partly undetermined sulphate; the two alteration miners photograph the same, though perfectly distinct to the eye. Utah. 1908. Plate 22-D in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00121 ID. Butler, B.S. 121 Specimen of smithsonite pseudomorphs after calcite crystals, from seventh level, Horn Silver Mine. Utah. 1908. Plate 24-A, natural size, in U.S. Geological Survey. Professional paper 80. 1913. Plate 23-B in U.S. Geological Survey. Professional paper 111. 1920. #1:/Utah-Professional paper 80/bbs00122 ID. Butler, B.S. 122 Photomicrograph: covellite replacing pyrite, Horn Silver Mine; pyrite (light grains) surrounded by covellite (dark material). Beaver County, Utah. 1908. Plate 23-B, enlarged 275 diameters, in U.S. Geological Survey. Professional paper 80. 1913. #1:/Utah-Professional paper 80/bbs00123 ID. Butler, B.S. 123 Photomicrograph of zinc sulphide, Horn Silver Mine: dark gray sulphides, sphalerite, wurtzite; ordinary light. Utah. 1908. Plate 25-A, enlarged 43 diameters, in U.S. Geological Survey. Professional paper 80. 1913. Plate 24-A in U.S. Geological Survey. Professional paper 111. 1920. #1:/Utah-Professional paper 80/bbs00124 ID. Butler, B.S. 124 Photomicrograph of zinc sulphide, Horn Silver Mine: same specimen shown in Butler 123, with crossed nicols; dark areas sphalerite, light-gray areas wurtzite. Plate 25-B, enlarged 43 diameters, in U.S. Geological Survey. Professional paper 80. 1913. Plate 24- B in U.S. Geological Survey. Professional paper 111. 1920. #1:/Utah-Professional paper 80/bbs00125 ID. Butler, B.S. 125 Photomicrograph of zinc sulphide, Horn Silver Mine: crystals of zinc sulphides; ordinary light. Utah. 1908. Plate 25-C, enlarged 43 diameters, in U.S. Geological Survey. Professional paper 80. 1913. Plate 24-C in U.S. Geological Survey. Professional paper 111. 1920. #1:/Utah-Professional paper 80/bbs00126 ID. Butler, B.S. 126 Photomicrograph of zinc sulphide, Horn Silver Mine: same specimen shown in Butler 125, with crossed nicols; light areas wurtzite, surrounding a center of sphalerite. Utah. 1908. Plate 25-D, enlarged 43 diameters, in U.S. Geological Survey. Professional paper 80. 1913. Plate 24-D in U.S. Geological Survey. Professional paper 111. 1920. #1:/Utah-Professional paper 80/bbs00127 ID. Butler, B.S. 127 Photomicrograph of zinc sulphides, from Horn Silver Mine: same specimen shown in Butler 128, with crossed nicols; light areas wurtzite, gray areas sphalerite. Plate 26-B, enlarged 43 diameters, in U.S. Geological Survey. Professional paper 80. 1913. Plate 43- B in U.S. Geological Survey. Professional paper 111. 1920. #1:/Utah-Professional paper 80/bbs00128 ID. Butler, B.S. 128 Photomicrograph of zinc sulphides, from Horn Silver Mine: light areas holes in section, dark areas galena, gray zinc sulphides, ordinary light. Utah. 1908. Plate 26-A, enlarged 43 diameters, in U.S. Geological Survey. Professional paper 80. 1913. Plate 43-A in U.S. Geological Survey. Professional paper 111. 1920. #1:/Alabama-Professional paper 81/slw00085 ID. Stephenson, L.W. 85 Basal marine beds of the Eutaw formation, Broken Arrow Bend, Chattahoochee River, 10.5 miles (by river) below Columbus, Georgia in Russell County, Alabama. Circa 1907. Plate 4-A in U.S. Geological Survey. Professional paper 81. 1914. #1:/Georgia-Professional paper 81/slw00092 ID. Stephenson, L.W. 92 Beds of the Tombigbee sand member of the Eutaw formation as developed in the Chattahoochee region; Banks Landing, Chattahoochee River, 26.5 miles (by river) below Columbus. Stewart County, Georgia. Circa 1907. Plate 4-B in U.S. Geological Survey. Professional paper 81. 1914. #1:/Georgia-Professional paper 81/slw00173 ID. Stephenson, L.W. 173 Beds of Providence sand member of the Ripley formation; gully near Eufaula-Lumpkin road, 10.5 miles northeast of Georgetown, Quitman County, Georgia. Circa 1907. Plate 8-B in U.S. Geological Survey. Professional paper 81. 1914. #1:/Alabama-Professional paper 81/slw00319 ID. Stephenson, L.W. 319 Marine beds of Ripley formation: Chattahoochee River, Eufaula, Barbour County, Alabama. Circa 1907. Plate 7-A in U.S. Geological Survey. Professional paper 81. 1914. #1:/Alabama-Professional paper 81/slw00355 ID. Stephenson, L.W. 355 Tuscaloosa formation, consisting of sands and clays, with interbedded ferruginous layers, Huntsville road, 1.5 miles east of Cottondale, Tuscaloosa County, Alabama. Circa 1907. Plate 2-A in U.S. Geological Survey. Professional paper 81. 1914. #1:/Alabama-Professional paper 81/slw00375 ID. Stephenson, L.W. 375 Laminated sands and clays of the Eutaw formation, bluff at Z. Logan's Landing, Warrior River, 8.5 miles (by the river) above Great Southern railroad bridge, Hale County, Alabama. Circa 1907. Plate 2-B in U.S. Geological Survey. Professional paper 81. 1914. #1:/Mississippi-Professional paper 81/slw00382 ID. Stephenson, L.W. 382 Typical beds of the Tombigbee sand member of the Eutaw formation, Plymouth bluff Tombigbee River, Lowndes County, Mississippi. 1907. Plate 3-A in U.S. Geological Survey. Professional paper 81. 1914. #1:/Mississippi-Professional paper 81/slw00388 ID. Stephenson, L.W. 388 Specimens of Exogyra, costata, Exogyra costata var.cancellata (numerous), Gryphaea vesicularis, Anomia Argentaria and other fossils, weathered from Selma chalk at "Bald Knob" Joseph Reynolds place, 3 miles west of Corinth, Alcorn County, Mississippi. Circa 1907. Plate 11-A in U.S. Geological Survey. Professional paper 81. 1914. #1:/Georgia-Professional paper 81/slw00414 ID. Stephenson, L.W. 414 Cusseta sand member of the Ripley formation, overlain by typical marine beds of the formation cut of Seaboard Airline railway at Hichitee (Manta station), Chattahoochee County, Georgia. Circa 1907. Plate 8-A in U.S. Geological Survey. Professional paper 81. 1914. #1:/Alabama-Professional paper 81/slw00419 ID. Stephenson, L.W. 419 Unconformable contact between lower Cretaceous clay and basal sands, of the Eutaw formation, cut in Seale road, 4 miles southwest of Columbus, Georgia, in Russell County, Alabama. Circa 1907. Plate 1-B in U.S. Geological Survey. Professional paper 81. 1914. #1:/Alabama-Professional paper 81/slw00435 ID. Stephenson, L.W. 435 Lower Cretaceous sands and clays overlain unconformably by Pleistocene terrace gravels, sands, and sandy loams, Coosada Bluff, Alabama River, 11 miles north of Montgomery, Elmore County, Alabama. Circa 1907. Plate 1-A in U.S. Geological Survey. Professional paper 81. 1914. #1:/Alabama-Professional paper 81/slw00442 ID. Stephenson, L.W. 442 Selma chalk at its type locality: Alabama River, Selma, Dallas County, Alabama. Circa 1907. Plate 5-B in U.S. Geological Survey. Professional paper 81. 1914. #1:/Alabama-Professional paper 81/slw00471 ID. Stephenson, L.W. 471 Marine beds of the Ripley formation cut of Louisville and Nashville Railroad, 1-3/8 miles north of Fort Deposit, Lowndes County, Alabama. Circa 1907. Plate 7-B in U.S. Geological Survey. Professional paper 81. 1914. #1:/Alabama-Professional paper 81/slw00502 ID. Stephenson, L.W. 502 Typical exposure of the Selma chalk, Jones Bluff: Tombigbee River, near Epes, Sumter County, Alabama. Circa 1907. Plate 5-A in U.S. Geological Survey. Professional paper 81. 1914. #1:/Mississippi-Professional paper 81/slw00524 ID. Stephenson, L.W. 524 Specimens of Exogyra Ponderosa, Exogyra Ponderosa var. errataicostata (numerous), Gryaphaea aucella, and other fossils weathered from basal beds of Selma chalk near public road, 1 mile west of Cotton Gin Port, Monroe County, Mississippi. Circa 1907. Plate 11-B in U.S. Geological Survey. Professional paper 81. 1914. #1:/Mississippi-Professional paper 81/slw00540 ID. Stephenson, L.W. 540 Classic fossil locality of the Ripley formation: bluff on Owl Creek, 3 miles northeast of Ripley. Tippah County, Mississippi. Circa 1907. Plate 6-A in U.S. Geological Survey. Professional paper 81. 1914. #1:/Tennessee-Professional paper 81/slw00558 ID. Stephenson, L.W. 558 Beds of McNairy Sand member of the Ripley formation cut of Southern Railway 1.25 miles west of Cypress, McNairy County, Tennessee. Circa 1907. Plate 6-B in U.S. Geological Survey. Professional paper 81. 1914. #1:/Tennessee-Professional paper 81/slw00582 ID. Stephenson, L.W. 582 Liminated sands and clays of Coffee sand member of the Eutaw formation, bluff just above Pittsburg landing, Hardin County, Tennessee. Circa 1907. Plate 3-B in U.S. Geological Survey. Professional paper 81. 1914. #1:/New York-Professional paper 82/fml00048 ID. Fuller, M.L. 48 Folded beds of Manhasset formation near Tom Point, Port Washington. Nassau County, New York. Circa 1903. Plate 19-A in U.S. Geological Survey. Professional paper 82. 1914. #1:/New York-Professional paper 82/fml00052 ID. Fuller, M.L. 52 Banded Wisconsin till on old gravels (Mannetto?), at Dix Hills, Suffolk County, New York. Circa 1903. Plate 24-B in U.S. Geological Survey. Professional paper 82. 1914. #1:/New York-Professional paper 82/fml00053 ID. Fuller, M.L. 53 Semi-dune surface in interior of island, near Selden: Suffolk County, New York. Circa 1903. Plate 26-B in U.S. Geological Survey. Professional paper 82. 1914. #1:/New York-Professional paper 82/fml00056 ID. Fuller, M.L. 56 Overturned fold of Jacob sand lying on Herod Gravel member of Manhasset formation: east coast of Gardiners Island. Suffolk County New York. 1904. Plate 18-B in U.S. Geological Survey. Professional paper 82. 1914. #1:/New York-Professional paper 82/fml00058 ID. Fuller, M.L. 58 Manhasset gravel folded by overriding ice: Montauk Point, Suffolk County, New York. Circa 1903. Portion is plate 23-B in U.S. Geological Survey. Professional paper 82. 1914. #1:/New York-Professional paper 82/fml00059 ID. Fuller, M.L. 59 Upturned Gardiners clay and Jacob sand on east coast of Gardiners Island. Suffolk County, New York. 1904. Plate 18-A in U.S. Geological Survey. Professional paper 82. 1914. #1:/New York-Professional paper 82/fml00187 ID. Fuller, M.L. 187 Large decomposed erratic boulder in Mannetto gravel. Suffolk County, New York. Circa 1903. Plate 17-B in U.S. Geological Survey. Professional paper 82. 1914. #1:/New York-Professional paper 82/fml00188 ID. Fuller, M.L. 188 Banded Montauk till member of Manhasset formation, near Friars Head. Suffolk County, New York. Circa 1903. Plate 19-B in U.S. Geological Survey. Professional paper 82. 1914. #1:/New York-Professional paper 82/fml00191 ID. Fuller, M.L. 191 Pseudomoraine dunes near Friars Head: Suffolk County, New York. Circa 1903. Plate 8-A in U.S. Geological Survey. Professional paper 82. 1914. #1:/New York-Professional paper 82/fml00193 ID. Fuller, M.L. 193 Structure of Cretaceous clays: on Little Neck near Northport, Suffolk County, New York. Circa 1903. Plate 17-A in U.S. Geological Survey. Professional paper 82. 1914. #1:/New York-Professional paper 82/fml00195 ID. Fuller, M.L. 195 Unconformable contact between Hempstead(?) gravel member of Manhasset formation and Cretaceous deposits on Little Neck, Huntington. Suffolk County, New York. Circa 1903. Plate 23-A in U.S. Geological Survey. Professional paper 82. 1914. #1:/New York-Professional paper 82/fml00196 ID. Fuller, M.L. 196 Contact of Wisconsin till with Montauk till member: at Lloyd Neck. Suffolk County, New York. Circa 1903. Plate 22-A in U.S. Geological Survey. Professional paper 82. 1914. #1:/New York-Professional paper 82/fml00201 ID. Fuller, M.L. 201 Undermined peat on coast near Prospect Point, Manhasset Neck: Nassau County, New York. Circa 1903. Plate 26-A in U.S. Geological Survey. Professional paper 82. 1914. #1:/New York-Professional paper 82/fml00214 ID. Fuller, M.L. 214 Typical boulder beach on North Fluke: Suffolk County, New York. Circa 1903. Plate 24-A in U.S. Geological Survey. Professional paper 82. 1914. #1:/New York-Professional paper 82/fml00218 ID. Fuller, M.L. 218 Gravels Montauk member of Manhasset formation, on Lloyd Neck, showing composition and erosion. Photo by G.N. Knapp. Suffolk County, New York. Circa 1903. Plate 22-A in U.S. Geological Survey. Professional paper 82. 1914. #1:/New York-Professional paper 82/fml00220 ID. Fuller, M.L. 220 Cretaceous deposits on Lloyd Neck; showing composition and structure. Photo by G.N. Knapp. Suffolk County, New York. Circa 1903. Plate 14-B in U.S. Geological Survey. Professional paper 82. 1914. #1:/New York-Professional paper 82/fml00222 ID. Fuller, M.L. 222 Broken ground landslip area, northeast of Northport, upturned Cretaceous clays at base of landslip mass. Photo by G.N. Knapp. Suffolk County, New York. Circa 1903. Plate 13-B in U.S. Geological Survey. Professional paper 82. 1914. #1:/New York-Professional paper 82/fml00223 ID. Fuller, M.L. 223 Broken ground landslip area, northeast of Northport, inner scarp and tilted block. Photo by G.N. Knapp. Suffolk County, New York. Circa 1903. Plate 13-A in U.S. Geological Survey. Professional paper 82. 1914. #1:/New York-Professional paper 82/fml00225 ID. Fuller, M.L. 225 Main scarp at broken ground landslip area: northeast of Northport. Photo by G.N. Knapp. Suffolk County, New York. Circa 1903. Plate 14-A in U.S. Geological Survey. Professional paper 82. 1914. #1:/Georgia-Professional paper 84/slw00089 ID. Stephenson, L.W. 89 Plant locality at Chimney Bluff, Chattahoochee River, Chattahoochee County, Georgia. Plate 15-A in U.S. Geological Survey. Professional paper 84. 1914. #1:/South Carolina-Professional paper 84/slw00130 ID. Stephenson, L.W. 130 Plant bearing clay in Middendorf arkosic member, Black Creek formation: near Langley, Aiken County, South Carolina. 1907. Plate 1-B in U.S. Geological Survey. Professional paper 84. 1914. #1:/South Carolina-Professional paper 84/slw00131 ID. Stephenson, L.W. 131 Plant bearing clay in Middendorf arkosic member, Black Creek formation: near Middendorf, Chesterfield County, South Carolina. 1907. Plate 1-A in U.S. Geological Survey. Professional paper 84. 1914. #1:/Georgia-Professional paper 84/slw00165 ID. Stephenson, L.W. 165 Plant locality in the Cusseta sand member of the Ripley formation, near Buena Vista, Marion County, Georgia. 1907. Plate 15-B in U.S. Geological Survey. Professional paper 84. 1914. #1:/Florida-Professional paper 84/vtw00231 ID. Vaughan, T.W. 231 Mangrove swamp along Miami River, near Miami, Dade County, Florida. April 1908. Plate 16-A in U.S. Geological Survey. Professional paper 84. 1914 #1:/Louisiana-Professional paper 85/sew00380 ID. Shaw, E.W. 380 Wave-cut cliff on Gibraltar mud lump, Red Fish Bay. The mound on which the man stands was built by mud spring now extinct, and its crest is nearly 15 feet above mean tide, a height considerably greater than most mud lumps attain. On the left is shown a luxuriant growth of grass such as commonly flourishes on mud lumps. Plaquemines Parish, Louisiana. November 24, 1912. Plate 3-A in U.S. Geological Survey. Professional paper 85. 1914. #1:/Louisiana-Professional paper 85/sew00381 ID. Shaw, E.W. 381 Mud lump 3.5 miles southeast of Pass A Loutre lighthouse. The men stand besides mud springs each of which is associated with a fissure. In the distance are other mud-lump islands. Plaquemines Parish, Louisiana. November 25, 1912. Plate 3-B in U.S. Geological Survey. Professional paper 85. 1914. #1:/Louisiana-Professional paper 85/sew00382 ID. Shaw, E.W. 382 Mud spring at top of wave-cut cliff on mud lump 3 miles southeast of Pass A Loutre lighthouse. This and other photographs were taken in low water season, when the springs and mud lumps are least active. To judge by the fact that the rim of the "crater" has been built up only a few inches the discharge from this spring; even when most active, is probably very slight; these spluttering, volcano-like gas-mud springs seem a fitting accompaniment to the weird silent and unforeboded rise and subsidence of the islands. Plaquemines Parish, Louisiana. November 25, 1912. Plate 1-C in U.S. Geological Survey. Professional paper 85. 1914. #1:/Louisiana-Professional paper 85/sew00384 ID. Shaw, E.W. 384 Mud-lump Islands 2 to 3 miles southeast of Pass A Loutre lighthouse. All of these islands have been formed in the last few years by the swelling up of portions of the seafloor, so recently that none of them are shown on latest chart. Like other mud lumps they are comparatively flat-topped and concordant in height. Plaquemines Parish, Louisiana. November 25, 1912. Plate 1-A in U.S. Geological Survey. Professional paper 85. 1914. #1:/Louisiana-Professional paper 85/sew00449 ID. Shaw, E.W. 449 View about 3 miles seaward from end of Southwest Pass, showing light-colored, muddy river water in foreground and dark, clear seawater in distance. The boundary between the two is very sharp, and there seems to be also a difference in wave form between the clear and muddy water. Plaquemines Parish, Louisiana. November 1912. Plate 1-B in U.S. Geological Survey. Professional paper 85. 1914. #1:/Colorado-Professional paper 90/bes00241 ID. Bastin, E.S. 241 Photomicrograph of polished section of pitchblende ore from the Wood Mine, Quartz Hill, Gilpin County, Colorado; showing botryoidal forms characteristic of much of the pitchblende, Py marks pyrite. Plate 2-B, with graphics, in U.S. Geological Survey. Professional paper 90. 1915. #1:/Colorado-Professional paper 90/ccw01036 ID. Cross, C.W. 1036 La Plata sandstone on schist of Uncompahgre formation on north bank of Piedra River. Hinsdale County, Colorado 1909. Plate 8 in U.S. Geological Survey. Professional paper 90. 1915. #1:/Utah-Professional paper 90/lgf00084 ID. Loughlin, G.F. 84 Form a panorama: Lake Bonneville beds at the mouth of Sevier Canyon, near Leamington, Milliard County, Utah. 1913. Plate 9 in U.S. Geological Survey. Professional paper 90. 1915 #1:/Utah-Professional paper 90/lgf00085 ID. Loughlin, G.F. 85 Form a panorama: Lake Bonneville beds at the mouth of Sevier Canyon, near Leamington, Milliard County, Utah. 1913. Plate 9 in U.S. Geological Survey. Professional paper 90. 1915 #1:/Alabama-Professional paper 90/slw00445 ID. Stephenson, L.W. 445 Contact between the Selma chalk (Upper Cretaceous) and midway group (Eocene) at Old Canton Landing, Alabama River; the projecting conspicuous vegetation, marks the base of the Eocene. Wilcox County, Alabama. 1910. Plate 12-B in U.S. Geological Survey. Professional paper 90. 1915. #1:/Alabama-Professional paper 90/slw00446 ID. Stephenson, L.W. 446 Fault involving the Cretaceous-Eocene contact at Old Canton Landing, Alabama River, Wilcox County, Alabama. 1910. Plate 13-A in U.S. Geological Survey. Professional paper 90. 1915. #1:/Alabama-Professional paper 90/slw00448 ID. Stephenson, L.W. 448 Contact between the Selma chalk (Upper Cretaceous) and midway group (Eocene) at Old Canton Landing, Alabama River; the thin layer of quartzite at the base of the vegetation, marks the base of the Eocene. Wilcox County, Alabama. 1910. Plate 12-A in U.S. Geological Survey. Professional paper 90. 1915. #1:/Alabama-Professional paper 90/slw00512 ID. Stephenson, L.W. 512 Exposure exhibiting the Cretaceous-Eocene contact: on Macon-DeKalb road 7.5 miles south of Macon, Alabama, half a mile north of crossing of Running Water Creek. On account of the similarity of the materials composing the uppermost Cretaceous (Selma) and lowermost Eocene (Midway), the contact was determined only by the aid of the contained fossils. The basal Midway is here composed of reworked Selma chalk. The camera case rests on the contact. Noxubee County, Mississippi. 1910. Plate 13-B in U.S. Geological Survey. Professional paper 90. 1915 #1:/Mississippi-Professional paper 90/slw00534 ID. Stephenson, L.W. 534 Cretaceous-Eocene contact in cut of St. Louis & San Francisco Railroad 1 mile east of New Albany; the contact is beneath the indurated layer. Union County, Mississippi. 1909. Plate 14-A in U.S. Geological Survey. Professional paper 90. 1915. #1:/Texas-Professional paper 90/slw00718 ID. Stephenson, L.W. 718 Basal limestone of Midway formation on left bank of Hondo Creek, about a quarter of mile above the crossing of the road leading east from Elstone, Medina County, Texas. 1912. Plate 19-B in U.S. Geological Survey. Professional paper 90. 1915. #1:/Texas-Professional paper 90/slw00721 ID. Stephenson, L.W. 721 Escondido formation in bed of Hondo Creek at Rock Crossing, about 1.25 miles below the crossing of the road leading east from Elstone. Sphenodiscus (several varieties) occurs abundantly in these strata. Medina County, Texas. 1912. Plate 19-A in U.S. Geological Survey. Professional paper 90. 1915. #1:/Texas-Professional paper 90/slw00742 ID. Stephenson, L.W. 742 Basal limestone of Midway formation on southeast side of Elm Creek, 11 miles south of Sabinal, near Schuddemagen ranch house. Uvalde County, Texas. 1912. Plate 18-A in U.S. Geological Survey. Professional paper 90. 1915. #1:/Texas-Professional paper 90/slw00745 ID. Stephenson, L.W. 745 Eocene sandstone in bed of Hondo Creek, 3.5 miles south of Elstone, Medina County, Texas. 1912. Plate 18-B in U.S. Geological Survey. Professional paper 90. 1915. #1:/Texas-Professional paper 90/slw00798 ID. Stephenson, L.W. 798 Cretaceous-Eocene contact on the Rio Grande at White Bluff, about 5 miles above the Webb County line; the contact lies at the base of the projecting ledge of rock, close-up view. Maverick County, Texas. 1912. Plate 16-B in U.S. Geological Survey. Professional paper 90. 1915. #1:/Texas-Professional paper 90/slw00800 ID. Stephenson, L.W. 800 Cretaceous-Eocene contact on the Rio Grande at White Bluff, about 5 miles above the Webb County line; the contact lies at the base of the projecting ledge of rock, distant view. Maverick County, Texas. 1912. Plate 16-A in U.S. Geological Survey. Professional paper 90. 1915, #1:/Texas-Professional paper 90/slw00803 ID. Stephenson, L.W. 803 Potholes in basal limestone of the Midway formation on the Rio Grande 1 mile below White Bluff, Maverick County about 4 miles above the Webb County line. Texas. 1912. Plate 14-B in U.S. Geological Survey. Professional paper 90. 1915. #1:/Texas-Professional paper 90/slw00806 ID. Stephenson, L.W. 806 Contact between the Midway formation and overlying sandstone of Midway or Wilcox age on the Rio Grande, about 2.5 miles above the Webb County line, Maverick County, Texas. 1912. Plate 17-A in U.S. Geological Survey. Professional paper 90. 1915. #1:/Texas-Professional paper 90/slw00808 ID. Stephenson, L.W. 808 Sandstone of Midway or Wilcox age in prominent westward facing bluff on the Rio Grande, about 2 miles above the Webb County line, in Maverick County, Texas. 1912. Plate 17-B in U.S. Geological Survey. Professional paper 90. 1915. #1:/Colorado-Professional paper 90/het00012 ID. Hancock, E.T. 12 Jointing in sandstone of Mesaverde formation, at the"transfer", in T.2 N., R. 92 W. Meeker quadrangle, Rio Blanco County, Colorado. Circa 1910. Plate 21-A in U.S. Geological Survey. Professional paper 90. 1915. #1:/Colorado-Professional paper 90/het00124 ID. Hancock, E.T. 124 Jointing in sandstone of Mesaverde formation, at the"transfer", in T.4 N., R 91 W., Monument Butte quadrangle, Moffat County, Colorado. Circa 1910. Plate 21-B in U.S. Geological Survey. Professional paper 90. 1915. #1:/Mississippi-Professional paper 91/slw00544 ID. Stephenson, L.W. 544 Exposure of fossiliferous clay: in the Holly Springs sand at Oxford. Lafayette County, Mississippi. 1907. Plate 1-B in U.S. Geological Survey. Professional paper 91. 1916. #1:/Tennessee-Professional paper 92/slw00561 ID. Stephenson, L.W. 561 Strata of lower Jackson age along Wolf River near Memphis. Shelby County, Tennessee. 1907. Plate 25-A in U.S. Geological Survey. Professional paper 92. 1924. #1:/Tennessee-Professional paper 92/slw00562 ID. Stephenson, L.W. 562 Near view of strata shown in Stephenson 561, to show alternating beds of sand and lignitic clay. Shelby County, Tennessee. 1907. Plate 25-B in U.S. Geological Survey. Professional paper 92. 1924. #1:/Arkansas-Professional paper 92/slw00564 ID. Stephenson, L.W. 564 Succession of oyster beds in the lower part of the Jackson formation on Little Crow Creek. Plate 24-B, with graphics, in U.S. Geological Survey. Professional paper 92. 1924. #1:/Arkansas-Professional paper 92/slw00567 ID. Stephenson, L.W. 567 Lignite and plant bearing nodules of iron carbonate in the Claiborne group (Yegua formation, at Cherry Valley, Cross County, Arkansas. 1907. Plate 1-B in U.S. Geological Survey. Professional paper 92. 1924. #1:/Tennessee-Professional paper 91/slw00571 ID. Stephenson, L.W. 571 Exposure of fossiliferous clay: of Wilcox age in the Lagrange formation at Puryear, Henry County, Tennessee. 1907. Plate 1-A in U.S. Geological Survey. Professional paper 91. 1916. #1:/Mississippi-Professional paper 92/caf00018 ID. Crider, A.F. 18 The Tallahatta formation at Hoffman, Holmes County, Mississippi. January 1905. Plate 1-A in U.S. Geological Survey. Professional paper 92. 1924 #1:/Utah-Professional paper 93/weg00168 ID. Woodruff, E.G. 168 Wall of canyon of San Juan River near Honaker trail strata of Goodridge (Pennsylvanian) formation. San Juan County, Utah. 1910. Plate 4-A in U.S. Geological Survey. Professional paper 93. 1917. #1:/Colorado-Professional paper 94/rgb00292 ID. Richardson, G.B. 292 Dissected Tertiary peneplain of the Front Range, looking southwest from a point near Palmer Lake, in the distance the mountain parks rise above the peneplain. El Paso County, Colorado. Circa 1910. Plate 9-A in U.S. Geological Survey. Professional paper 94. 1917. #1:/Colorado-Professional paper 94/rgb00339 ID. Richardson, G.B. 339 Another view of the peneplain showing Pikes Peak rising above it, taken near the same locality as Richardson photo 292, but in a more southwesterly direction. El Paso County, Colorado. Circa 1910. Plate 9-B in U.S. Geological Survey. Professional paper 94. 1917. #1:/Colorado-Professional paper 94/bes00208 ID. Bastin, E.S. 208 Exposure of crumpled schist of the Idaho Springs formation in Virginia Canyon, near Seaton Gulch; the lighter bands are injections of pegmatite. Clear Creek County, Colorado. Circa 1911. Plate 10-A in U.S. Geological Survey. Professional paper 94. 1917. #1:/Colorado-Professional paper 94/bes00222 ID. Bastin, E.S. 222 Hornblende schist of Idaho Springs formation: intruded by pegmatite near Eldora. Boulder County, Colorado. Circa 1911. Plate 12-B in U.S. Geological Survey. Professional paper 94. 1917. #1:/Colorado-Professional paper 94/bes00223 ID. Bastin, E.S. 223 Outwash plain of later glacial epoch: in valley of Middle Boulder Creek, between Eldora and Nederland, looking eastward. Boulder County, Colorado. Circa 1911. Plate 12-A in U.S. Geological Survey. Professional paper 94. 1917. #1:/Colorado-Professional paper 94/bes00224 ID. Bastin, E.S. 224 Caribou: looking west from Boulder County Hill. Boulder County, Colorado. Circa 1911. Plate 17-B in U.S. Geological Survey. Professional paper 94. 1917. #1:/Colorado-Professional paper 94/bes00237 ID. Bastin, E.S. 237 Mammoth Hill from east, showing open pits marking outcrop of Mammoth vein. Gilpin County, Colorado. Circa 1911. Plate 18-A in U.S. Geological Survey. Professional paper 94. 1917. #1:/Colorado-Professional paper 94/bes00243 ID. Bastin, E.S. 243 Photomicrograph: lean iron ore from Caribou, showing magnetite and ilmenite and augite, black areas are magnetite and ilmenite; gray areas are augite. Colorado. Circa 1911. Plate 11-B, enlarged 16 diameters, in U.S. Geological Survey. Professional paper 94. 1917. #1:/Colorado-Professional paper 94/bes00244 ID. Bastin, E.S. 244 Photomicrograph: lean iron ore from Caribou, showing magnetite and ilmenite, augite and serpentine, black areas are magnetite and ilmenite, white areas are serpentine formed by alteration of olivine; some unaltered olivine remains and is gray. Colorado. Circa 1911. Plate 11-C, enlarged 29 diameters, in U.S. Geological Survey. Professional paper 94. 1917. #1:/Colorado-Professional paper 94/bes00245 ID. Bastin, E.S. 245 Specimen of etched crystal of galena from vug in Hayseed vein, near Central City, crystals were coated with film of ammonium chloride to avoid reflections in photographing it. Colorado. Circa 1911. Plate 17-A in U.S. Geological Survey. Professional paper 94. 1917. #1:/Colorado-Professional paper 94/bes00246 ID. Bastin, E.S. 246 Specimens showing injection gneiss formed by intimate intrusion of quartz biotite schist of the Idaho Springs formation by granite pegmatite; taken from dump of Golden Rod tunnel, Silver Creek. Gilpin County, Colorado. Circa 1911. Plate 10-B, natural size, in U.S. Geological Survey. Professional paper 94. 1917. #1:/Colorado-Professional paper 94/bes00247 ID. Bastin, E.S. 247 Specimen: ore of composite type from Fourth of July mine, near Central City; pyretic ore has been brecciated and the fractures filled by ore of the galena-sphalterite type. Colorado. Circa 1911. Plate 11-C, natural size, in U.S.Geological Survey. Professional paper 94. 1917. #1:/Colorado-Professional paper 94/bes00297 ID. Bastin, E.S. 297 Photomicrograph: Uraninite or pitchblende traversed by sulphide veinlets, showing chalcopyrite, sphalerite and pyrite, ore taken from German-Belcher mine. Colorado. Circa 1911. Plate 16-B, with graphics enlarged 110 diameters, in U.S. Geological Survey. Professional paper 94. 1917. #1:/Colorado-Professional paper 94/bes00298 ID. Bastin, E.S. 298 Photomicrograph: uraninite or pitchblende fractured and brecciated and interspaces filled with ore composed principally of chalcopyrite with galena, pyrite and sphalerite, ore taken from German-Belcher mine. Colorado. Circa 1911. Plate 16-A, with graphics enlarged 100 diameters, in U.S. Geological Survey. Professional paper 94. 1917. #1:/Alaska-Professional paper 95/sps00826 ID. Smith, P.S. 826 Triassic conglomerate: 3 miles north of Dall Head, Gravina Island, Ketchikan district, Southeastern Alaska region, Alaska. 1913. Plate 7-A in U.S. Geological Survey. Professional paper 95. 1916. #1:/Alaska-Professional paper 95/sps00892 ID. Smith, P.S. 892 Andesitic agglomerate: on west coast of Gravina Island. Ketchikan district, Southeastern Alaska region, Alaska. 1913. Plate 7-C in U.S. Geological Survey. Professional paper 95. 1916. #1:/Alaska-Professional paper 95/sps00894 ID. Smith, P.S. 894 Triassic sandstones and shales: on west coast of Gravina Island. Ketchikan district, Southeastern Alaska region, Alaska. 1913. Plate 7-B in U.S. Geological Survey. Professional paper 95. 1916. #1:/Idaho-Professional paper 97/ujb00066 ID. Umpleby, J.B. 66 Characteristic surface of latest flows of Snake River basalt, Lava Creek district, Butte County, Idaho. 1912. Plate 5-A in U.S. Geological Survey. Professional paper 97. 1917. #1:/Idaho-Professional paper 97/ujb00067 ID. Umpleby, J.B. 67 Typical topography of Miocene eruptive rocks: Era district, Idaho. 1912. Plate 5-B in U.S. Geological Survey. Professional paper 97. 1917. #1:/Idaho-Professional paper 97/ujb00069 ID. Umpleby, J.B. 69 Big Clear Creek spring, near Mackay; issues about 20 feet above the base of high limestone cliff. Custer County, Idaho. 1912. Plate 6-A in U.S. Geological Survey. Professional paper 97. 1917. #1:/Idaho-Professional paper 97/ujb00073 ID. Umpleby, J.B. 73 Lost River Range above Mackay, near Leatherman Pass. Custer County, Idaho. 1912. Plate 2-A in U.S. Geological Survey. Professional paper 97. 1917. #1:/Idaho-Professional paper 97/ujb00074 ID. Umpleby, J.B. 74 Lost River valley from a point 12 miles west of Chilly, looking east toward the Lost River Range. Custer County, Idaho. 1912. Plate 2-B in U.S. Geological Survey. Professional paper 97. 1917. #1:/Idaho-Professional paper 97/ujb00090 ID. Umpleby, J.B. 90 White Knob, Alder Creek district, view from northeast, Custer County, Idaho. 1912. Plate 12-B in U.S. Geological Survey. Professional paper 97. 1917. #1:/Idaho-Professional paper 97/ujb00094 ID. Umpleby, J.B. 94 Topography in the vicinity of the upper ore bodies: Empire mine, Alder Creek district, Custer County, Idaho. 1912. Plate 6-B in U.S. Geological Survey. Professional paper 97. 1917. #1:/Idaho-Professional paper 97/ujb00095 ID. Umpleby, J.B. 95 Wilbert Mine and mill: Dome district, Custer County, Idaho. 1912. Plate 3-B in U.S. Geological Survey. Professional paper 97. 1917. #1:/Idaho-Professional paper 97/ujb00099 ID. Umpleby, J.B. 99 Pyramid Peak, Lemhi Range, as seen from Kaufman, Clark County, Idaho. 1912. Plate 3-A in U.S. Geological Survey. Professional paper 97. 1917. #1:/Idaho-Professional paper 97/ujb00101 ID. Umpleby, J.B. 101 Principal workings of the Empire mine, Alder Creek district; showing (from upper left to bottom right) North tunnel level, 300-foot level and Alberta or 700 foot level. Custer County, Idaho. 1912. Plate 9-A, levels marked by graphics, in U.S. Geological Survey. Professional paper 97. 1917. #1:/Idaho-Professional paper 97/ujb00103 ID. Umpleby, J.B. 103 Continuation to the north of photo 101, two areas marked on published photo by 'ls' are blocks of limestone engulfed in the granite porphyry: photo overlaps at the smoke stack seen in lower left, with that shown in Umpleby 101. Custer County, Idaho. 1912. Plate 9-B in U.S. Geological Survey. Professional paper 97. 1917. #1:/Idaho-Professional paper 97/ujb00106 ID. Umpleby, J.B. 106 Pass Creek canyon, Lost River Range, Butte County, Idaho. 1912. Plate 4-A in U.S. Geological Survey. Professional paper 97. 1917. #1:/Idaho-Professional paper 97/ujb00107 ID. Umpleby, J.B. 107 Upper Mississippian beds exposed in Pass Creek canyon. Butte County, Idaho. 1912. Plate 4-B in U.S. Geological Survey. Professional paper 97. 1917. #1:/Alaska-Professional-paper 98/jbl00516 ID. Johnson, B.L. 516 Barry and Coxe Glaciers, August 18, 1913, from outwash plain formed by Barry glacier in 1899; note outcrop of rock in front of glacier and separation of Barry and Coxe Glaciers. Port Wells district, Alaska Gulf region, Alaska. Plate 5-A in U.S. Geological Survey. Professional paper 98. 1917. #1:/Idaho-Professional-paper 98/mgr00072 ID. Mansfield, G.R. 72 View north near the summit of Red Mountain, in the northeastern part of the Montpelier quadrangle, Bear Lake County, Idaho. August 16, 1911. Plate 13-B in U.S. Geological Survey. Professional paper 98. 1917. Plate 32-C in U.S. Geological Survey Professional paper 132. 1927. #1:/Idaho-Professional-paper 98/mgr00253 ID. Mansfield, G.R. 253 Shaly and limy strata of the lower division of the Wayan formation exposed in Tincup Canyon, in the north-central part of the Freedom quadrangle. Caribou County, Idaho. October 29, 1914. Plate 14-A in U.S. Geological Survey. Professional paper 98. 1917. Plate 40-B in U.S. Geological Survey Professional paper 132. 1927. #1:/Arizona-Professional-paper 98/rfl00761 ID. Ransome, F.L. 761 Quartzites of the Ray quadrangle: banded Dripping Spring quartzite, Mescal Range 1 mile south of Pioneer, Gila County, Arizona. Circa 1912. Plate 27-B in U.S. Geological Survey. Professional paper 98. 1917. Plate 9-A in U.S. Geological Survey. Professional paper 115. 1919. #1:/Arizona-Professional-paper 98/rfl00763 ID. Ransome, F.L. 763 Sections of Paleozoic rocks in Ray quadrangle: section on El Capitan Creek, Mescal Range, Gila County, Arizona. Circa 1912. Plate 29-A in U.S. Geological Survey. Professional paper 98. 1917. Plate 12-B in U.S. Geological Survey. Professional paper 115. 1919. Plate 6 in U.S. Geological Survey. Folio 217. 1923. #1:/Arizona-Professional-paper 98/rfl00782 ID. Ransome, F.L. 782 Sections of Paleozoic rocks in Ray quadrangle: El Capitan from the northwest. Gila County, Arizona. Circa 1912. Plate 29-A in U.S. Geological Survey. Professional paper 98. 1917. #1:/Arizona-Professional-paper 98/rfl00785 ID. Ransome, F.L. 785 Barnes conglomerate, El Capitan Creek, Gila County, Arizona. Circa 1912. Plate 26-C in U.S. Geological Survey. Professional paper 98. 1917. Plate 2 in U.S. Geological Survey. Folio 217. 1923. #1:/Arizona-Professional-paper 98/rfl00790 ID. Ransome, F.L. 790 Mescal limestone in the Ray quadrangle: typical exposure of the cherty Mescal limestone in the Dripping Spring Range, 2 miles south of Dripping Spring ranch. Gila County, Arizona. Circa 1912. Plate 28-A in U.S. Geological Survey. Professional paper 98. 1917. #1:/Arizona-Professional-paper 98/rfl00791 ID. Ransome, F.L. 791 Quartzites of the Ray quadrangle: cross-bedded pebbly Troy quartzite, Dripping Spring Range, Arizona. Circa 1912. Plate 27-A in U.S. Geological Survey. Professional paper 98. 1917. Plate 12-A in U.S. Geological Survey. Professional paper 115. 1919. Plate 5 in U.S. Geological Survey. Folio 217. 1923. #1:/Arizona-Professional-paper 98/rfl00799 ID. Ransome, F.L. 799 Mescal limestone in the Ray quadrangle: Steeply upturned Mescal limestone with intrusive diabase in the Tortilla Range, about 6 miles south of Kelvin, Pinal County, Arizona. Circa 1912. Plate 28-B in U.S. Geological Survey. Professional paper 98. 1917. Plate 10-B in U.S. Geological Survey. Professional paper 115. 1919. #1:/Arizona-Professional-paper 98/rfl00851 ID. Ransome, F.L. 851 Abrigo limestone in the Mule Mountains: Typical exposure three-fourths of a mile northwest of Military Hill, Tombstone district, Cochise County, Arizona. Circa 1912. Plate 30-A in U.S. Geological Survey. Professional paper 98. 1917. #1:/Mississippi-Professional-paper 98/sew00491 ID. Shaw, E.W. 491 Lithologic character of Catahoula sandstone: fine-grained sandstone 3 miles northeast of Florence, Rankin County, Mississippi. October 16, 1913. October 18, 1913. Plate 49-A in U.S. Geological Survey. Professional paper 98. 1917. #1:/Mississippi-Professional-paper 98/sew00492 ID. Shaw, E.W. 493 Lithologic character of Catahoula sandstone: weathered sandstone grading to red sand, 2 miles, northeast if Florence, Rankin County, Mississippi. October 16, 1913. October 18, 1913. Plate 49-B in U.S. Geological Survey. Professional paper 98. 1917. #1:/Mississippi-Professional-paper 98/sew00494 ID. Shaw, E.W. 494 Detail in gravel pit 1 mile south of Weathersby, Simpson County, Mississippi. October, 17, 1913. Plate 38-A in U.S. Geological Survey. Professional paper 98. 1917. #1:/Mississippi-Professional-paper 98/sew00495 ID. Shaw, E.W. 495 Gravel pit 1 mile south of Weathersby, Simpson County, Mississippi. October, 17, 1913. Plate 38-B in U.S. Geological Survey. Professional paper 98. 1917. #1:/Mississippi-Professional-paper 98/sew00498 ID. Shaw, E.W. 498 Lithologic character of Catahoula sandstone: sandstone containing irregular masses of clay, 7 miles south of Brandon. Braxton County, Mississippi. October 18, 1913. Plate 48-B in U.S. Geological Survey. Professional paper 98. 1917. #1:/Mississippi-Professional-paper 98/sew00499 ID. Shaw, E.W. 499 Lithologic character of Catahoula sandstone: interlaminated and interbedded sandstones and clays, 7 miles south of Brandon. Braxton County, Mississippi. October 18, 1913. Plate 48-A in U.S. Geological Survey. Professional paper 98. 1917. #1:/Texas-Professional-paper 98/vtw00861 ID. Vaughan, T.W. 861 Close view of clay fragments derived from undercutting by a small stream, Sulphur Creek, Live Oak County, Texas. circa 1910. Plate 42-B in U.S. Geological Survey. Professional paper 98. 1917. #1:/Texas- Professional-paper 98/vtw00862 ID. Vaughan, T.W. 862 Clay fragments derived from undercutting by a small stream, Sulphur Creek, Live Oak County, Texas. circa 1910. Plate 42-A in U.S. Geological Survey. Professional paper 98. 1917. #1:/Mississippi-Professional-paper 98/magc0115 ID. Matson, G.C. 115 Lithologic character of Catahoula sandstone: cross bedded sands and clays, 3 miles southwest of Waynesboro. Wayne County, Mississippi. 1911. Plate 53-A in U.S. Geological Survey. Professional paper 98. 1917. #1:/Louisiana-Professional-paper 98/magc0217 ID. Matson, G.C. 217 Lithologic character of Fayette Sandstone: light-colored sandstone and dark colored quartzite. Vernon Parish, Louisiana. 1911. Plate 54-A in U.S. Geological Survey. Professional paper 98. 1917. #1:/Louisiana-Professional-paper 98/magc0218 ID. Matson, G.C. 218 Lithologic character of Fayette Sandstone: massive beds of quartzite. Vernon Parish, Louisiana. 1911. Plate 54-B in U.S. Geological Survey. Professional paper 98. 1917. #1:/Wyoming-Professional-paper 98/cdd00062 ID. Condit, D.D. 62 Embar and associated formation on south flank of Owl Creek Mountains near Shot Gun Creek, in T. 7 N., R. 1 E. Upturned shales of Chugwater formation at left; resistant upturned limestone of Park City formation at right, underlain by Tensleep sandstone, which forms the highest hill in the foreground at right. Hot Springs County, Wyoming. 1913. Plate 62-A in U.S. Geological Survey. Professional paper 98. 1917. #1:/Wyoming-Professional-paper 98/cdd00097 ID. Condit, D.D. 97 Red beds in middle of Embar formation on east slope of Bighorn Mountains near Barnum in T. 42 N., R. 84 W., at top of hill is calcareous conglomerate. The beds below consist of structure less friable sandy red shale with irregular laminae of limestone, much distorted and faulted. These beds rest on even undisturbed layers of limestone that form the basal part of the Embar formation. Thickness to top of hill is about 90 feet. Johnson County, Wyoming. 1915. Plate 62-B in U.S. Geological Survey. Professional paper 98. 1917. #1:/Wyoming-Professional-paper 98/cdd00092 ID. Condit, D.D. 92 Nodular cherty shales overlain by limestone in upper part of Embar formation near head of No Wood Creek, in T. 41 N., R. 89 W., at the base is phosphatic limestone in the geologic position of the principal phosphate bed found elsewhere. Washakie County, Wyoming. 1915. Plate 63-B in U.S. Geological Survey. Professional paper 98. 1917. #1:/Wyoming-Professional-paper 98/cdd00101 ID. Condit, D.D. 101 Bed and veinlets of gypsum in lower part of Embar formation near south end of Sheep Mountain anticline. About 17 feet above the 4 foot layer of gypsum is limestone filled with marine fossils. The veinlets of gypsum are in structure less red shale. Big Horn County, Wyoming. 1915. Plate 63-A in U.S. Geological Survey. Professional paper 98. 1917. #1:/New Mexico-Professional-paper 98/bcm00193 ID. Bauer, C.M. 193 The desert plain viewed northwestward across the valley of Chaco River, south of Hunter Wash. Chaco River and other arroyos are in trenched from 75 to 200 feet in this plain, which slopes westward 25 feet to the mile. The Great Hogback is seen in the distance; Elevation above sea level at plane table 5,680 feet. San Juan County, New Mexico. Circa 1915. Plate 66-C in U.S. Geological Survey. Professional paper 98. 1917. #1:/New Mexico-Professional-paper 98/bcm00214 ID. Bauer, C.M. 214 Pictured cliffs sandstone overlying shale on north side of Coal Creek, 3 miles from its mouth; looking westward. San Juan County, New Mexico. Circa 1915. Plate 67-A in U.S. Geological Survey. Professional paper 98. 1917. #1:/New Mexico-Professional-paper 98/bcm00247 ID. Bauer, C.M. 247 Ojo Alamo sandstone at Ojo Alamo Store, Puerco formation overlying Ojo Alamo sandstone is shown in the distance; looking northward. San Juan County, New Mexico. Circa 1915. Plate 68-B in U.S. Geological Survey. Professional paper 98. 1917. #1:/New Mexico-Professional-paper 98/bcm00251 ID. Bauer, C.M. 251 View eastward from divide between Ojo Alamo and Barrel Spring arroyos, Kirtland shale in foreground. Conical butte capped with lower part of Ojo Alamo sandstone. Butte at left consists of Kirtland shale at base, overlain by conglomeratic sandstone of Ojo Alamo, and that in turn by the middle or shale member of the same formation, with pebbles from the disintegrated upper conglomeratic member scattered over the top. San Juan County, New Mexico. Circa 1915. Plate 71-A in U.S. Geological Survey. Professional paper 98. 1917. #1:/New Mexico- Professional-paper 98/bcm00262 ID. Bauer, C.M. 262 Kirtland shale has overlain by Wasatch formation on south side of San Juan River, opposite Farmington, San Juan County, New Mexico. Circa 1915. Plate 66-A in U.S. Geological Survey. Professional paper 98. 1917. #1:/Mississippi-Professional-paper 98/hob00011 ID. Hopkins, O.B. 11 Lithologic character of Catahoula sandstone: sandstones and clays, Mississippi Springs, east of Raymond, Hinds County, and Mississippi. Circa 1911. Plate 53-B in U.S. Geological Survey. Professional paper 98. 1917. #1:/Professional paper 101-Colorado/stw00550 ID. Stanton, T.W. 550 Form a panorama: Rockvale sandstone member of the Vermejo formation near Brookside, showing lower part of upper coal group, Rockvale sandstone member, fossil locality were invertebrates were collected. Fremont County, Colorado. Circa 1907. Plate 24, as a panorama with graphics, in U.S. Geological Survey. Professional paper 101. 1917. #1:/Professional paper 101-Colorado/stw00551 ID. Stanton, T.W. 551 Form a panorama: Rockvale sandstone member of the Vermejo formation near Brookside, showing lower part of upper coal group, Rockvale sandstone member, fossil locality were invertebrates were collected. Fremont County, Colorado. Circa 1907. Plate 24, as a panorama with graphics, in U.S. Geological Survey. Professional paper 101. 1917. #1:/Professional paper 101-Colorado/stw00552 ID. Stanton, T.W. 552 Form a panorama: Escarpment at eastern margin of Canon City coalfield, north of Rockvale; from top to bottom, cliff-making sandstone, capped with Arapahoe (?) conglomerate, upper coal group of the Vermejo formation and Rockvale sandstone member of the Vermejo formation. Fremont County, Colorado. Circa 1907. Plate 23, as a panorama with graphics, in U.S. Geological Survey. Professional paper 101. 1917. #1:/Professional paper 101-Colorado/stw00553 ID. Stanton, T.W. 553 Form a panorama: Escarpment at eastern margin of Canon City coalfield, north of Rockvale; from top to bottom, cliff-making sandstone, capped with Arapahoe (?) conglomerate, upper coal group of the Vermejo formation and Rockvale sandstone member of the Vermejo formation. Fremont County, Colorado. Circa 1907. Plate 23, as a panorama with graphics, in U.S. Geological Survey. Professional paper 101. 1917. #1:/Professional paper 101-New Mexico/lwt00045 ID. Lee, W.T. 45 Punta de la Mesa, near San Ygnacio, Guadalupe County, New Mexico. 1910. Plate 27-A in U.S. Geological Survey. Professional paper 101. 1917. #1:/Professional paper 101-New Mexico/lwt0404a ID. Lee, W.T. 404a Hogback in Vermejo Gap, showing the basal conglomerate of the Raton formation: overlying the Vermejo coal measures. Here composed as one image, but in reality two photos forming a panorama. Colfax County, New Mexico. 1910. Plate 19-B, with sketch, in U.S. Geological Survey. Professional paper 101. 1917. #1:/Professional paper 101-New Mexico/lwt0407a ID. Lee, W.T. 407a Cliffs in the north wall of Cimarron Canyon: showing the sandstones of the lower part of Raton formation. Colfax County, New Mexico. 1910. Plate 6, composed of 407a and 407b, in U.S. Geological Survey. Professional paper 101. 1917. #1:/Professional paper 101-New Mexico/lwt0407b ID. Lee, W.T. 407b Cliffs in the north wall of Cimarron Canyon: showing the sandstones of the lower part of Raton formation. Colfax County, New Mexico. 1910. Plate 6, composed of 407a and 407b, in U.S. Geological Survey. Professional paper 101. 1917. #1:/Professional paper 101-Colorado/lwt00421 ID. Lee, W.T. 421 A characteristic outcrop of the Trinidad sandstone, about 4 miles north of Trinidad; top to bottom Vermejo formation, Trinidad sandstone and Pierre Shale. Las Animas County, Colorado. 1909. Plate 14-A, with graphics, in U.S. Geological Survey. Professional paper 101. 1917. #1:/Professional paper 101-Colorado/lwt00593 ID. Lee, W.T. 593 Eastern margin of Trinidad coalfield near Shumway. Huerfano County, Colorado. 1909. Plate 16-B in U.S. Geological Survey. Professional paper 101. 1917. #1:/Professional paper 101-Colorado/lwt00597 ID. Lee, W.T. 597 Structural relations shown in north wall of Santa Clara Canyon: at eastern margin of the Trinidad coalfield. Huerfano County, Colorado. 1909. Plate 16-A, with sketch, in U.S. Geological Survey. Professional paper 101. 1917. #1:/Professional paper 101-New Mexico/lwt00605 ID. Lee, W.T. 605 Form a panorama, showing the Vermejo formation in relation to neighboring formations in north wall of Purgatoire canyon near Sopris. Las Animas County, Colorado. 1909. Plate 14-B, as one photo with graphics, in U.S. Geological Survey. Professional paper 101. 1917. #1:/Professional paper 101-New Mexico/lwt00606 ID. Lee, W.T. 606 Form a panorama, showing the Vermejo formation in relation to neighboring formations in north wall of Purgatoire canyon near Sopris. Las Animas County, Colorado. 1909. Plate 14-B, as one photo with graphics, in U.S. Geological Survey. Professional paper 101. 1917. #1:/Professional paper 101-Colorado/lwt00609 ID. Lee, W.T. 609 South wall of Purgatoire Canyon near Sopris: a general view showing the Raton basal conglomerate, the unconformity between a coal bed and Vermejo formation. Las Animas County, Colorado. 1909. Plate 13-A, with graphics, in U.S. Geological Survey. Professional paper 101. 1917. #1:/Professional paper 101-Colorado/lwt00610 ID. Lee, W.T. 610 South wall of Purgatoire Canyon near Sopris: a closer view showing the Raton basal conglomerate, the unconformity between a coal bed Vermejo formation, and fault. Las Animas County, Colorado. 1909. Plate 13-B, with graphics, in U.S. Geological Survey. Professional paper 101. 1917. #1:/Professional paper 101-Colorado/lwt00617 ID. Lee, W.T. 617 North wall of Tercio Park, showing structural relations: Cornell, Las Animas County, Colorado. 1909. Plate 19-A, with sketch, in U.S. Geological Survey. Professional paper 101. 1917. #1:/Professional paper 101-New Mexico/lwt00619 ID. Lee, W.T. 619 Coal in the basal conglomerate of the Raton formation, Vermejo Canyon: irregular shaped masses of coal. Colfax County, New Mexico. 1910. Portion is plate 18-A, with scale on bottom margin, in U.S. Geological Survey. Professional paper 101. 1917. #1:/Professional paper 101-New Mexico/lwt00620 ID. Lee, W.T. 620 Coal in the basal conglomerate of the Raton formation, Vermejo Canyon: pebbles of coal embedded in conglomeratic sandstone. Colfax County, New Mexico. 1910. Portion is plate 18-C, with scale on bottom margin and graphics, in U.S. Geological Survey. Professional paper 101. 1917. #1:/Professional paper 101-New Mexico/lwt00623 ID. Lee, W.T. 623 Coal in the basal conglomerate of the Raton formation, Vermejo Canyon: rounded pebble of coal surrounded by pebbles of siliceous rock. Colfax County, New Mexico. 1910. Portion is plate 18-B, with scale on bottom margin and graphics, in U.S. Geological Survey. Professional paper 101. 1917. #1:/Professional paper 101-New Mexico/lwt00633 ID. Lee, W.T. 633 Unconformity between the Vermejo and Raton formations, Ponil Canyon; from top to bottom, basal conglomerate of the Raton formation, unconformity, and W.T. Lee has his hand on Vermejo formation. Colfax County, New Mexico. 1910. Plate 7-A, with graphics, in U.S. Geological Survey. Professional paper 101. 1917. #1:/Professional paper 101-New Mexico/lwt00641 ID. Lee, W.T. 641 Breaks of the mesa east of Dawson. A characteristic view of the edge of the Raton coalfield; in the foreground is the western limit of the Great Plains, overlain from bottom to top by Pierre Shale, Trinidad sandstone, Vermejo formation, and topped by Raton formation. Here composed as one image, but in reality two photos forming a panorama. Colfax County, New Mexico. 1910. Plate 3, with graphics, in U.S. Geological Survey. Professional paper 101. 1917. #1:/Professional paper 101-New Mexico/lwt00645 ID. Lee, W.T. 645 North wall of canyon at Koehler: showing the relation of the Vermejo formation to the Trinidad sandstone and Raton formation. Colfax County, New Mexico. 1910. Plate 7-B, with sketch, in U.S. Geological Survey. Professional paper 101. 1917. #1:/Professional paper 101-New Mexico/lwt00648 ID. Lee, W.T. 648 Rocks about 3 miles southeast of Van Houten: The Vermejo formation is absent and the Raton formation rests unconformably upon the Trinidad sandstone, from top to bottom, Raton formation, an unconformity, Trinidad sandstone, Pierre Shale and the plains. Colfax County, New Mexico. 1910. Plate 8-C, with graphics, in U.S. Geological Survey. Professional paper 101. 1917. #1:/Professional paper 101-New Mexico/lwt00649 ID. Lee, W.T. 649 Rocks about 3 miles southeast of Van Houten: The Vermejo formation is absent and the Raton formation rests unconformably upon the Trinidad sandstone, from top to bottom, Raton formation, an unconformity, Trinidad sandstone and Pierre Shale. Colfax County, New Mexico. 1910. Plate 8-B, with graphics, in U.S. Geological Survey. Professional paper 101. 1917. #1:/Professional paper 101-New Mexico/lwt00650 ID. Lee, W.T. 650 Rocks about 3 miles southeast of Van Houten: The Vermejo formation is absent and the Raton formation rests unconformably upon the Trinidad sandstone, from top to bottom, Raton formation, an unconformity, and Trinidad sandstone. Colfax County, New Mexico. 1910. Plate 8-A, with graphics, in U.S. Geological Survey. Professional paper 101. 1917. #1:/Professional paper 101-New Mexico/lwt00654 ID. Lee, W.T. 654 Structural relations of formations at Willow mine, Van Houten; north wall of canyon at the mine, showing from top to bottom Raton formation, basal conglomerate of the Raton, unconformity between Vermejo and Raton formations, coal bed within Vermejo and Trinidad sandstone. Colfax County, New Mexico. 1910. Plate 9-A, with sketch, in U.S. Geological Survey. Professional paper 101. 1917. #1:/Professional paper 101-New Mexico/lwt00655 ID. Lee, W.T. 655 Structural relations of formations at Willow mine, Van Houten: one of the openings of the mine showing the conglomerate resting on coal. Colfax County, New Mexico. 1910. Plate 9-B in U.S. Geological Survey. Professional paper 101. 1917. #1:/Professional paper 101-New Mexico/lwt00667 ID. Lee, W.T. 667 Eastward dipping formations north of Galisteo Creek: showing left to right, Gypsiferous red beds, Morrison formation, Dakota sandstone, gastropod zone at base of Mancos shale, Tres Hermanos sandstone member of Mancos shale, main body of Mancos shale, Santa Fe marl. Santa Fe County, New Mexico. 1910. Plate 29-B, with graphics, in U.S. Geological Survey. Professional paper 101. 1917. #1:/Professional paper 101-New Mexico/lwt00669 ID. Lee, W.T. 669 Top of Mancos shale and basal sandstone of Mesaverde formation west of Madrid: showing fossil localities 7164 and 7165. Santa Fe County, New Mexico. 1910. Plate 29- A, with graphics, in U.S. Geological Survey. Professional paper 101. 1917. #1:/Professional paper 101-New Mexico/lwt00671 ID. Lee, W.T. 671 Sandstone concretions in the Galisteo sandstone: near Madrid, Santa Fe County, New Mexico. 1910. Plate 29-A, with graphics, in U.S. Geological Survey. Professional paper 101. 1917 #1:/Professional paper 101-New Mexico/lwt00678 ID. Lee, W.T. 678 Coal bearing portion of Mesaverde formation at Hagan, showing top to bottom, fossil plant locality 6022, fossil locality 6023 and principal coal bed. Sandoval County, New Mexico. 1910. Plate 28-A, with graphics, in U.S. Geological Survey. Professional paper 101. 1917. #1:/Professional paper 101-New Mexico/lwt00679 ID. Lee, W.T. 679 Fossil wood in Tertiary deposits, near Pina Vititos, Hagan field, Sandoval County, New Mexico. 1910. Plate 28-B in U.S. Geological Survey. Professional paper 101. 1917. #1:/Professional paper 101-New Mexico/lwt00692 ID. Lee, W.T. 692 Valley of Rio Puerco north of San Francisco, showing sandstone supposed to belong in the Morrison formation, and the lower part of Mancos shale, including gastropod zone and Tres Hermanos sandstone member. San Juan County, New Mexico. 1910. Plate 27- C in U.S. Geological Survey. Professional paper 101. 1917. #1:/Professional paper 101-New Mexico/lwt00696 ID. Lee, W.T. 696 Cabezon Butte, a large volcanic plug, from Cabezon, showing the upper sandy part of the Mancos shale and the basal sandstone of the Mesaverde formation. Sandoval County, New Mexico. 1910. Plate 26-A, with graphics, in U.S. Geological Survey. Professional paper 101. 1917. #1:/Professional paper 101-New Mexico/lwt00719 ID. Lee, W.T. 719 Lewis shale and "Laramie" formation near Dulce: top to bottom, coal bed, fossil plant locality, marine invertebrates fossil locality. Rio Arriba County, New Mexico. 1910. Plate 25-A,with graphics, in U.S. Geological Survey. Professional paper 101. 1917. #1:/Professional paper 101-New Mexico/lwt00771 ID. Lee, W.T. 771 West slope of Prieta Mesa about 5 south of Casa Salazar, showing light colored sandstone supposed to be of Morrison age, the Mancos shale, including at its base the gastropod zone and the Tres Hermanos sandstone member and the basal sandstone of the Mesaverde formation in the distance, under capping of igneous rock near top of mesa. San Juan County, New Mexico. 1910. Plate 27-B in U.S. Geological Survey. Professional paper 101. 1917. #1:/Professional paper 101-New Mexico/lwt00772 ID. Lee, W.T. 772 Volcanic plug about a mile west of Casa Salazar, showing the Punta de la Mesa sandstone member of the Mancos shale, the dark shale below and the light colored sandy portion of the Mancos shale. Sandoval County, New Mexico. 1910. Plate 26-B, with graphics, in U.S. Geological Survey. Professional paper 101. 1917. #1:/Professional paper 101-New Mexico/lwt00775 ID. Lee, W.T. 775 Volcanic plug north of Casa Salazar, showing the dark shale of the lower part of the Mancos, the Punta de la Mesa sandstone member, the sandy portion of the Mancos shale, and the top of the plug. Sandoval County, New Mexico. 1910. Plate 26-C, with graphics, in U.S. Geological Survey. Professional paper 101. 1917. #1:/Professional paper 101-New Mexico/lwt00777 ID. Lee, W.T. 777 Top of Mancos shale and basal sandstone of the Mesaverde formation, exposed at Cabezon;. Shows fossil locality for lot 7195 with relation to Mesaverde formation. Sandoval County, New Mexico. 1910. Plate 25-C, with graphics, in U.S. Geological Survey. Professional paper 101. 1917. #1:/Professional paper 101-New Mexico/lwt00778 ID. Lee, W.T. 778 Mancos shale and the basal sandstone of the Mesaverde formation exposed near El Vado, Rio Arriba County, New Mexico. 1910. Plate 25-B, with graphics, in U.S. Geological Survey. Professional paper 101. 1917. #1:/Professional paper 101-New Mexico/lwt00798 ID. Lee, W.T. 798 Cliff in north slope of Johnson Mesa south of Yankee; showing basal sandstone of Raton formation resting unconformably on Trinidad sandstone. Colfax County, New Mexico. 1910. Plate 11-B in U.S. Geological Survey. Professional paper 101. 1917. #1:/Professional paper 101-New Mexico/lwt00808 ID. Lee, W.T. 808 Goat Hill, at Raton: showing cliff of Trinidad sandstone, beneath coal-bearing Vermejo formation and above Pierre shale. Colfax County, New Mexico. 1910. Colfax County, New Mexico. 1910. Plate 11-A in U.S. Geological Survey. Professional paper 101. 1917. #1:/Professional paper 104-Nevada/bes00256 ID. Bastin, E.S. 256 Banded hypo gene ore: The light gray areas are mainly a fine intergrowth of ferruginous rhodochrosite and quartz; the dark gray to black areas are mainly quartz carry hypo gene sulphides in numerous very minute grains. The radial structure of some of the rhodochrosite-quartz intergrowths at right angles to the banding is dimly shown. Enlarged 1.5 diameters: Belmont vein, 1,000-foot level. Nye County, Nevada. 1915. Portion is plate 1-A in U.S. Geological Survey. Professional paper 104. 1918. #1:/Professional paper 104-Nevada/bes00257 ID. Bastin, E.S. 257 Banded hypo gene ore: Murray vein, Tonopah Extension mine, just below 950-foot level, one-half natural size. Nye County, Nevada. 1915. Portion is plate 1-B in U.S. Geological Survey. Professional paper 104. 1918. #1:/Professional paper 104-Nevada/bes00258 ID. Bastin, E.S. 258 Hypo gene intergrowth of quartz and pyrargyrite; photomicrograph of polished surface of ore from vein between 400 and 500-foot levels, Last Chance mine. These minerals are believed to be contemporary results of rock replacement. Nye County, Nevada. 1915. Plate 3-A in U.S. Geological Survey. Professional paper 104. 1918. #1:/Professional paper 104-Nevada/bes00261 ID. Bastin, E.S. 261 Supposed hypo gene veinlets of pyrargyrite: the veinlets pass from areas partly altered wall rock to quartz areas and become less well defined in the quartz; natural size, Tonopah Extension mine, exact location uncertain. Nye County, Nevada. 1915. Plates 2-A and B, with graphics, in U.S. Geological Survey. Professional paper 104. 1918. #1:/Professional paper 104-Nevada/bes00262 ID. Bastin, E.S. 262 Supposed hypo gene veinlets of pyrargyrite: the veinlets pass from areas partly altered wall rock to quartz areas and become less well defined in the quartz; natural size, Tonopah Extension mine, exact location uncertain. Nye County, Nevada. 1915. Plates 2-A and B, with graphics, in U.S. Geological Survey. Professional paper 104. 1918. #1:/Professional paper 104-Nevada/bes00263 ID. Bastin, E.S. 263 Irregular veinlet of sphalerite (smooth light gray) and argentite (rough light gray), bordered by quartz (dark gray), with scattered irregular areas of sphalerite; the sphalerite- argentite veinlet is believed to mark a line of easy replacement in the original rock. All the minerals are interpreted as alpha hypo gene. Photomicrograph of polished surface of ore from stope 600 C, West End vein, West End mine. Nye County, Nevada. 1915. Plate 3-B in U.S. Geological Survey. Professional paper 104. 1918. #1:/Professional paper 104-Nevada/bes00264 ID. Bastin, E.S. 264 Irregular intergrowth of polybasite, probably alpha hypo gene, with quartz and pyrite; photomicrograph of polished surface of ore just above 500-foot level, West End vein, West End mine. Nye County, Nevada. 1915. Plate 4-A, with graphics, in U.S. Geological Survey. Professional paper 104. 1918. #1:/Professional paper 104-Nevada/bes00265 ID. Bastin, E.S. 265 Polybasite (light gray) with bladelike outlines, inclosed by pyrargyrite (white); the dark gray is quartz. The polybasite has been made visible by brief treatment with mercuric chloride solution. Photomicrograph of polished surface of ore, Tonopah Extension mine, exact location uncertain. Nye County, Nevada. 1915. Plate 4-B in U.S. Geological Survey. Professional paper 104. 1918. #1:/Professional paper 104-Nevada/bes00266 ID. Bastin, E.S. 266 Electrum (stippled) irregularly intergrown with sphalerite and quartz; the argentite shown in this photograph was probably formed by the replacement of (beta hypo gene) of galena all the other minerals, including the electrum, are believed to be alpha hypo gene; Photomicrograph of polished surface of ore from 1,050-foot level, Macdonald vein, North Star Mine. Nye County, Nevada. 1915. Plate 5-A, with graphics, in U.S. Geological Survey. Professional paper 104. 1918. #1:/Professional paper 104-Nevada/bes00267 ID. Bastin, E.S. 267 Electrum showing crystal outlines associated with quartz and sulphides. The argentite was very probably formed by the replacement of galena, but all the other minerals are believed to be alpha hypo gene. Photomicrograph of polished surface of ore from 1,260- foot level, Murray vein, Tonopah Extension mine. Nye County, Nevada. 1915. Plate 5- B, with graphics, in U.S. Geological Survey. Professional paper 104. 1918. #1:/Professional paper 104-Nevada/bes00268 ID. Bastin, E.S. 268 Radiating intergrowths of quartz (white) and ferruginous rhodochrosite (gray) with small patches of finely divided sulphides (black); photomicrograph (ordinary light) of this thin section of ore from 1000-foot level, Belmont vein. Nye County, Nevada. 1915. Plate 6- A in U.S. Geological Survey. Professional paper 104. 1918. #1:/Professional paper 104-Nevada/bes00269 ID. Bastin, E.S. 269 Irregular fine aggregates of carbonate, argentite, and chalcopyrite intergrown with ore minerals in larger grains; photomicrograph of polished surface of ore from Favorite vein, Tonopah-Belmont mine. Nye County, Nevada. 1915. Plate 6-B, with graphics, in U.S. Geological Survey. Professional paper 104. 1918. #1:/Professional paper 104-Nevada/bes00270 ID. Bastin, E.S. 270 Transition from areas wholly galena into areas that are mainly galena with some carbonate (rough dark gray) and argentite and finally into areas that are mainly carbonate with some argentite, galena, chalcopyrite, and electrum, named in order of abundance; photomicrograph of polished surface of ore from 1,000-foot level, Favorite vein, Tonopah-Belmont mine. Nye County, Nevada. 1915. Plate 7-A, with graphics, in U.S. Geological Survey. Professional paper 104. 1918. #1:/Professional paper 104-Nevada/bes00272 ID. Bastin, E.S. 272 Breccia of quartz and sericitized wall rock partly replace by pyrargyrite; photomicrograph of polished surface of ore. Enlarged 25 diameters. Tonopah Extension mine, exact location uncertain. Nye County, Nevada. 1915. Plate 2-C in U.S. Geological Survey. Professional paper 104. 1918. #1:/Professional paper 104-Nevada/bes00274 ID. Bastin, E.S. 274 Replacement of galena by polybasite; between these two minerals occur narrow bands of an unidentified transition mineral (not visible in the picture), and the very narrow light colored bands that mark the initiation of the replacement process along the contacts between galena crystals consist of this mineral. Photomicrograph of polished surface of ore from Favorite vein, Tonopah-Belmont mine, depth uncertain. Nye County, Nevada. 1915. Plate 7-B, with graphics, in U.S. Geological Survey. Professional paper 104. 1918. #1:/Professional paper 104-Nevada/bes00275 ID. Bastin, E.S. 275 Sphalerite traversed by minute veinlets of chalcopyrite and polybasite; some of the veinlets in sphalerite are continuous with areas of the same minerals replacing galena this feature does not show in the picture. The veinlets are in the main formed by replacement, though possibly in small part fracture fillings. Photomicrograph of polished surface of ore from hanging-wall branch of Belmont vein, 1,200-foot level, Tonopah-Belmont mine. Nye County, Nevada. 1915. Plate 8-A, with graphics, in U.S. Geological Survey. Professional paper 104. 1918. #1:/Professional paper 104-Nevada/bes00276 ID. Bastin, E.S. 276 Partial replacement of galena by fine aggregate of a light-colored carbonate, argentite and some chalcopyrite; there has been a slight replacement of the quartz. Photomicrograph of polished surface of ore from Favorite vein, Tonopah-Belmont mine, depth uncertain. Nye County, Nevada. 1915. Plate 9-A in U.S. Geological Survey. Professional paper 104. 1918. #1:/Professional paper 104-Nevada/bes00278 ID. Bastin, E.S. 278 Peripheral replacement of galena by an association of argentite and electrum (stippled); note the smoothness of the galena border in passing from contact with argentite to contact with electrum. Photomicrograph of polished surface of ore from 1,250-foot level Murray vein, Tonopah Extension mine. Nye County, Nevada. 1915. Plate 9-B in U.S. Geological Survey. Professional paper 104. 1918. #1:/Professional paper 104-Nevada/bes00277 ID. Bastin, E.S. 277 Photomicrograph showing tuffaceous character of fraction dacite breccia, near station 1447 on 300-foot level of West End mine, Nye County, Nevada. 1915. Plate 10-A in U.S. Geological Survey. Professional paper 104. 1918. #1:/Professional paper 104-Nevada/bes00280 ID. Bastin, E.S. 280 Ferruginous calcite coating highly oxidized ore just below fraction dacite breccia, two- thirds natural size, from stope 484 not far above 400-foot level, West End vein, West End mine, Nye County, Nevada. 1915. Plate 10-B in U.S. Geological Survey. Professional paper 104. 1918. #1:/Professional paper 104-Nevada/bes00283 ID. Bastin, E.S. 283 Branching deposit of argentite, probably super gene, on wall of fracture in quartzose hypo gene ore; small amount of finely crystalline chalcopyrite are associated with the argentite. Specimen from 1,130-foot level, Macdonald vein, North Star mine; natural size. Nye County, Nevada. 1915. Plate 11-A in U.S. Geological Survey. Professional paper 104. 1918. #1:/Professional paper 104-Nevada/bes00284 ID. Bastin, E.S. 284 Polybasite probably super gene partly filling fractures in white, opaque quartz; in a few places finely crystalline chalcopyrite and in one place a little native silver are deposited on the polybasite, Macdonald vein, Montana-Tonopah mine. Nye County, Nevada. 1915. Plate 12-A in U.S. Geological Survey. Professional paper 104. 1918. #1:/Professional paper 104-Nevada/bes00285 ID. Bastin, E.S. 285 Branching deposits of pyrargyrite and polybasite probably super gene, on walls of fracture in white quartz, Montana-Tonopah mine, exact location uncertain, about natural size. Nye County, Nevada. 1915. Plate 12-B in U.S. Geological Survey. Professional paper 104. 1918. #1:/Professional paper 104-Nevada/bes00287 ID. Bastin, E.S. 287 Oxidation banding in Mizpah trachyte, from walls of Valley View mine: natural size. Nye County, Nevada. 1915. Plate 13-B in U.S. Geological Survey. Professional paper 104. 1918. #1:/Professional paper 104-Nevada/bes00289 ID. Bastin, E.S. 289 Oxidation banding in Mizpah trachyte adjacent to Valley View vein; about two-thirds natural size, small crystals of pyrite are abundant in the unoxidized portion, but are absent from the banded portion of the vein. Nye County, Nevada. 1915. Plate 14-A in U.S. Geological Survey. Professional paper 104. 1918. #1:/Professional paper 104-Nevada/bes00290 ID. Bastin, E.S. 290 Photomicrograph of contact between oxidized and unoxidized portions of specimen shown as Bastin 289: In the unoxidized half as shown at the left, small pyrite crystals abound; in the oxidized half the iron occurs as finely divided oxide, though the spaces originally occupied by pyrite are still recognizable. Nye County, Nevada. 1915. Plate 15-A in U.S. Geological Survey. Professional paper 104. 1918. #1:/Professional paper 104-Nevada/bes00291 ID. Bastin, E.S. 291 Photomicrograph of contact between oxidized and unoxidized portions of specimen shown as Bastin 289: In the polarized light, shows that the oxidation banding is in a general way independent of the original rock texture. It will be noted, however, that very little iron oxide has developed in the phenocrysts. Nye County, Nevada. 1915. Plate 15-B in U.S. Geological Survey. Professional paper 104. 1918. #1:/Professional paper 104-Nevada/bes00293 ID. Bastin, E.S. 293 Oxidation banding in fine, even-grained felsite, natural size, near North Star shaft, Nye County, Nevada. 1915. Plate 14-B in U.S. Geological Survey. Professional paper 104. 1918. #1:/Professional paper 104-Nevada/bes00295 ID. Bastin, E.S. 295 Liesegang rings of ferrous and ferric hydroxides developed in agar agar by diffusion from opposite ends of tubes of iron sulphates and sodium hydroxide; After 17 days 'A' is the first and 'B' second ring formed. Plate 16-A, with graphics, in U.S. Geological Survey. Professional paper 104. 1918. #1:/Professional paper 104-Nevada/bes00296 ID. Bastin, E.S. 296 Liesegang rings of ferrous and ferric hydroxides developed in agar agar by diffusion from opposite ends of tubes of iron sulphates and sodium hydroxide; After one month, most of the rings were ferrous hydroxide, but in the late stages, when the iron solution had oxidized, rings of ferric hydroxide were developed in Bastin 295. Plate 16-B, with graphics, in U.S. Geological Survey. Professional paper 104. 1918. #1:/Arizona-Professional paper 115/rfl00748 ID. Ransome, F.L. 748 Closer view in vicinity of photo 750; showing jointing in overthrust quartzite; Gila County, Arizona. 1911. Plate 29-A in U.S. Geological Survey. Professional paper 115. 1919. #1:/Arizona-Professional paper 115/rfl00750 ID. Ransome, F.L. 750 Edge of block of Troy quartzite overthrust on diabase and Dripping Spring quartzite, 2 miles north of Tam O'Shanter Peak, Ray quadrangle; looking northwest. Gila County, Arizona. 1911. Plate 29-A in U.S. Geological Survey. Professional paper 115. 1919. #1:/Arizona-Professional paper 115/rfl00755 ID. Ransome, F.L. 755 Cambrian beds, northwest from stage road 2 miles south of Pioneer Mountain, Ray quadrangle, the bold hill on the left is composed, in ascending order, of diabase, Troy quartzite, Martin limestone and Tornado limestone. The broad saddle to the right of this hill is occupied by a great diabase sill, which passes beneath the Troy quartzite to the left and laps up onto a dip slope of the Dripping Spring quartzite just to the right. The diabase has disrupted the Mescal limestone, which belongs between the two quartzites and remnants of the limestone strata included in the diabase can be recognized as rather extensive white patches that in the field contrast sharply with the dark olive tint of the diabase surface. Gila County, Arizona. 1911. Plate 9-B in U.S. Geological Survey. Professional paper 115. 1919. #1:/Arizona-Professional paper 115/rfl00757 ID. Ransome, F.L. 757 El Capitan, the culminating peak of the Mescal Range, seen from the northwest, the peak is Troy quartzite with Devonian and carboniferous limestone lapping part way up its gentle back slope (see Ransome 766). Hills in the middle of the view are capped by masses of Dripping Spring quartzite resting on and surrounded by diabase but retaining the general homoclinial attitude. Gila County, Arizona. 1911. Plate 3-A in U.S. Geological Survey. Professional paper 115. 1919. #1:/Arizona-Professional paper 115/rfl00760 ID. Ransome, F.L. 760 Weathering phenomena: characteristic weathering of diabase on stage road just south Pioneer. Gila County, Arizona. 1911. Plate 14-B in U.S. Geological Survey. Professional paper 115. 1919. #1:/Arizona-Professional paper 115/rfl00764 ID. Ransome, F.L. 764 Dripping Spring Range, as seen from a point 2 miles east-southeast of Dripping Spring ranch; view is nearly west, note absence of regular forms compare with Ransome 757. Gila County, Arizona. 1911. Plate 4-B in U.S. Geological Survey. Professional paper 115. 1919. #1:/Arizona-Professional paper 115/rfl00766 ID. Ransome, F.L. 766 Southwest slope of the Mescal Range from point 2 miles east-southeast of Dripping Spring ranch; direction of view is east-northeast. The gentle back slope, almost a dip slope, is cut by deep canyons and is overlapped by the spurs of Gila conglomerate seen in the middle of the view. A large boulder weathered from the Gila conglomerate lies in the foreground. Gila County, Arizona. 1911. Plate 3-B in U.S. Geological Survey. Professional paper 115. 1919. #1:/Arizona-Professional paper 115/rfl00769 ID. Ransome, F.L. 769 Nearer view in same general location as Ransome 770, showing constitution of a partly sandy variety: Yardstick for scale. Gila County, Arizona. 1911. Plate 22-B in U.S. Geological Survey. Professional paper 115. 1919. #1:/Arizona-Professional paper 115/rfl00770 ID. Ransome, F.L. 770 Typical natural exposure of the Gila conglomerate showing characteristic erosion 2.5 miles east-southeast of Dripping Spring ranch: Gila County, Arizona. 1911. Plate 22-A in U.S. Geological Survey. Professional paper 115. 1919. Plate 7 in U.S. Geological Survey. Folio 217. 1923. #1:/Arizona-Professional paper 115/rfl00776 ID. Ransome, F.L. 776 Weathering phenomena; diffusion rings as a result of weathering in Troy quartzite, top of hill, 2 miles south-southwest of Old Baldy, on the west side of El Capitan creek. Gila County, Arizona. 1911. Plate 14-A in U.S. Geological Survey. Professional paper 115. 1919. #1:/Arizona-Professional paper 115/rfl00779 ID. Ransome, F.L. 779 Cambrian beds, a typical hillside section in the Mescal Range. Looking west near the junction of Pioneer and Silver creeks. The smooth lower slope, beyond the maguey or "mescal" plant in the foreground, is diabase and in the actual landscape is dark olive- green. The bluff just above the thick diabase sill is the upper part of the Troy quartzite. The slope above it, the thin outcropping beds, is on the Martin (Devonian) Limestone, and the crest and back slope are Tornado (carboniferous) limestone. In the distance, across the Dripping Spring Valley is the Dripping Spring Range. Gila County, Arizona. 1911. Plate 8-A in U.S. Geological Survey. Professional paper 115. 1919. #1:/Arizona-Professional paper 115/rfl00787 ID. Ransome, F.L. 787 Dripping Spring Valley from the southwest, looking across the Mescal Range; shows intricately dissected filling of Gila conglomerate. Gila County, Arizona. 1911. Plate 4-A in U.S. Geological Survey. Professional paper 115. 1919. Plate 1 in U.S. Geological Survey. Folio 217. 1923. #1:/Arizona-Professional paper 115/rfl00788 ID. Ransome, F.L. 788 Fault in Dripping Spring Range, 2 miles southeast of Dripping Spring ranch. The fault plane dips west away from the observer. The rock on the hanging-wall side is Troy quartzite; on the footwall side, diabase. The diabase has crumbled away, leaving the quartzite as an overhanging scarp on which may be seen the striations produced by movement along the fault. Gila County, Arizona. 1911. Plate 28-A in U.S. Geological Survey. Professional paper 115. 1919. #1:/Arizona-Professional paper 115/rfl00792 ID. Ransome, F.L. 792 Northwest over dacite flow north of Ray, showing rough, desolate character of its surface. The spurs in the foreground are chiefly diabase with masses of disrupted Cambrian strata. The distant mountains are those extending northwest from Superior past Roosevelt, including south end of the Mescal Range. Pinal County, Arizona. 1910. Plate 21-A in U.S. Geological Survey. Professional paper 115. 1919. #1:/Arizona-Professional paper 115/rfl00795 ID. Ransome, F.L. 795 Stream channel scoured in sandy facies of Gila conglomerate and filled with coarser material; between Erman and Branaman stations on the Arizona Eastern Railroad, Ray quadrangle. Pinal County, Arizona. 1910. Plate 23-A in U.S. Geological Survey. Professional paper 115. 1919. #1:/Arizona-Professional paper 115/rfl00797 ID. Ransome, F.L. 797 Unusually well stratified and steeply tilted material provisionally included with the Gila conglomerate. Exposure is near Hackberry Spring in the southwestern part of the Ray quadrangle; the direction of view is nearly north. The derrick records an attempt to find oil under these beds. Pinal County, Arizona. 1910. Plate 26-A in U.S. Geological Survey. Professional paper 115. 1919. #1:/Arizona-Professional paper 115/rfl00798 ID. Ransome, F.L. 798 Mouth of gorge below Hackberry Spring, looking southwest; the camera was place on the bluff shown in photo 797. The gorge is cut in steeply upturned Paleozoic beds and diabase; the entrance is in Tornado limestone. At the right, just across the gravelly streambed and probably faulted down against the limestone, is some of the silty material described. It is this silt that appears to have been regarded as possibly oil bearing. Pinal County, Arizona. 1910. Plate 26-B in U.S. Geological Survey. Professional paper 115. 1919. #1:/Arizona-Professional paper 115/rfl00802 ID. Ransome, F.L. 802 Down Gila River from the mouth of Mineral Creek; the river, slightly swollen by recent rains when the photograph was take, is here cutting through the Pre-Cambrian granite of the Tortilla Range: Photo by J.B. Umpleby. Pinal County, Arizona. 1910. Plate 5-B in U.S. Geological Survey. Professional paper 115. 1919. #1:/Arizona-Professional paper 115/rfl00803 ID. Ransome, F.L. 803 Mineral creek as viewed upstream near Kelvin. This portion of the streambed, usually dry, is here shown carrying abundant water during a rainstorm: Photo by J.B. Umpleby. Pinal County, Arizona. 1910. Plate 5-A in U.S. Geological Survey. Professional paper 115. 1919. #1:/Arizona-Professional paper 115/rfl00804 ID. Ransome, F.L. 804 Fault on west side of Mineral Creek, half a mile south of Ray. The observer is looking south, nearly along the fault. The rock of the footwall, just above the old wagon wheels, is Dripping Spring quartzite. The rock of the hanging wall, on which bushes are growing, is Pinal schist. The schist rests on the younger quartzite, and the fault is of the reverse type. Pinal County, Arizona. 1910. Plate 28-B in U.S. Geological Survey. Professional paper 115. 1919. #1:/Arizona-Professional paper 115/rfl00811 ID. Ransome, F.L. 811 Remnants of an alluvial terrace on the south side of Copper Canyon, near Ray; the town in the distance is Sonora, the Mexican settlement of the district, Barcelona, the Spanish settlement and Vitoria, a temporary Apache camp, are shown on the terrace. Pinal County, Arizona. 1910. Plate 27-A in U.S. Geological Survey. Professional paper 115. 1919. #1:/Arizona-Professional paper 115/rfl00814 ID. Ransome, F.L. 814 View of big dome seen in Ransome 818, a pinnacle of hard Gila conglomerate; whose top is 447 feet above the stream at its base. Pinal County, Arizona. 1910. Plate 24-B in U.S. Geological Survey. Professional paper 115. 1919. #1:/Arizona-Professional paper 115/rfl00817 ID. Ransome, F.L. 817 Cavernous weathering in hard Gila conglomerate on Mineral Creek, 3 miles south of Ray; Pinal County, Arizona. 1910. Plate 23-B in U.S. Geological Survey. Professional paper 115. 1919. #1:/Arizona-Professional paper 115/rfl00818 ID. Ransome, F.L. 818 North up Mineral Creek about 3 miles below Ray, showing bluffs and domes of Gila conglomerate. Pinal County, Arizona. 1910. Plate 24-A in U.S. Geological Survey. Professional paper 115. 1919. #1:/Arizona-Professional paper 115/rfl00819 ID. Ransome, F.L. 819 South, down Mineral Creek, from a point about 3 miles south of Ray; shows dissected cut terrace in Gila conglomerate west of the creek. The sharp peak on the right skyline is in the Tortilla Range. Nearly under it on a terrace between Mineral Creek and the Gila is the village of Kelvin, once the headquarters of the Ray Copper Mines, Ltd., but now a place of small importance. The railroad built by the present company appears on the east bank of the creek. Pinal County, Arizona. 1910. Plate 27-B in U.S. Geological Survey. Professional paper 115. 1919. #1:/Arizona-Professional paper 115/rfl00820 ID. Ransome, F.L. 820 Natural exposure of Gila conglomerate forming Big Dome: Pinal County, Arizona. 1910 Plate 25-A in U.S. Geological Survey. Professional paper 115. 1919. #1:/Arizona-Professional paper 115/rfl00821 ID. Ransome, F.L. 821 Mass thrown out by a railway blast near Big Dome, boulders or fragments of quartzite, granite, quartz diorite, limestone, dacite and diabase; pocket watch hanging from fob (upper center) provides scale. Pinal County, Arizona. 1910. Plate 25-B in U.S. Geological Survey. Professional paper 115. 1919. #1:/Arizona-Professional paper 115/rfl00866 ID. Ransome, F.L. 866 Topography of the Ray area from ridge north of Copper Canyon, a characteristic outcrop of leached hardened schist. The distant hills are part of the Dripping Spring Range and the rounded summit behind the cactus is Troy Mountain. Pinal County, Arizona. 1910. Plate 44-B in U.S. Geological Survey. Professional paper 115. 1919. #1:/Arizona-Professional paper 115/rfl00896 ID. Ransome, F.L. 896 Surfaces effects of mining by caving systems in the Miami district; west over the pit caused by mining the Inspiration ore body near the former Joe Bush shaft. The overhanging cliffs on the left result from the breaking away of the footwall of the Joe Bush fault. Gila County, Arizona. 1911. Plate 35-A in U.S. Geological Survey. Professional paper 115. 1919. #1:/Arizona-Professional paper 115/rfl00898 ID. Ransome, F.L. 898 Surfaces effects of mining by caving systems in the Miami district; west over the surface above the main ore body of the Miami mine, the No. 2 shaft was just to the left of the curved road in the right middle distance. Gila County, Arizona. 1911. Plate 35-B in U.S. Geological Survey. Professional paper 115. 1919. #1:/Arizona-Professional paper 115/rfl00881 ID. Ransome, F.L. 881 General view of the Miami concentrator and No. 4 shaft from the northeast, part of the town of Miami may be seen in the valley beyond the shaft, and a portion of the tailings pond on the left. Shows well the spurs of Gila conglomerate lapping up on the granitic slopes of this part of the Pinal Range. Gila County, Arizona. 1911. Plate 36-A in U.S. Geological Survey. Professional paper 115. 1919. #1:/Arizona-Professional paper 115/rfl00882 ID. Ransome, F.L. 882 Looking southeast across Miami Flat showing characteristic topography of Gila conglomerate, Gila County, Arizona. 1911. Plate36-B in U.S. Geological Survey. Professional paper 115. 1919. #1:/Arizona-Professional paper 115/rfl00888 ID. Ransome, F.L. 888 Form a panorama of the Miami district from the south; 881 Liveoak gulch and Miami Flat, 889 west portion of Miami, 890 Miami High School, Miami mill and concentrate bins, and 891 Miami power plant and International smelter. Vertical lines mark the points to overlap the photos to form the panorama. Gila County, Arizona. 1911. Plate 40, with corresponding sketch identifying more details, in U.S. Geological Survey. Professional paper 115. 1919. #1:/Arizona-Professional paper 115/rfl00889 ID. Ransome, F.L. 889 Form a panorama of the Miami district from the south; 881 Liveoak gulch and Miami Flat, 889 west portion of Miami, 890 Miami High School, Miami mill and concentrate bins, and 891 Miami power plant and International smelter. Vertical lines mark the points to overlap the photos to form the panorama. Gila County, Arizona. 1911. Plate 40, with corresponding sketch identifying more details, in U.S. Geological Survey. Professional paper 115. 1919. #1:/Arizona-Professional paper 115/rfl00890 ID. Ransome, F.L. 890 Form a panorama of the Miami district from the south; 881 Liveoak gulch and Miami Flat, 889 west portion of Miami, 890 Miami High School, Miami mill and concentrate bins, and 891 Miami power plant and International smelter. Vertical lines mark the points to overlap the photos to form the panorama. Gila County, Arizona. 1911. Plate 40, with corresponding sketch identifying more details, in U.S. Geological Survey. Professional paper 115. 1919. #1:/Arizona-Professional paper 115/rfl00891 ID. Ransome, F.L. 891 Form a panorama of the Miami district from the south; 881 Liveoak gulch and Miami Flat, 889 west portion of Miami, 890 Miami High School, Miami mill and concentrate bins, and 891 Miami power plant and International smelter. Vertical lines mark the points to overlap the photos to form the panorama. Gila County, Arizona. 1911. Plate 40, with corresponding sketch identifying more details, in U.S. Geological Survey. Professional paper 115. 1919. #1:/Arizona-Professional paper 115/rfl00907 ID. Ransome, F.L. 907 Northwest view of the Ray district from the east side of Mineral Creek; on the left, across the creek is the No. 1 mine of the Ray Consolidated Copper Co. Farther to the right are the head frame, crusher house, and ore bin of the No.2 mine, and still farther to the right. Nearly in line with the tall cactus are the corresponding structures of the No. 3 mine. The prominent peak near the middle of the skyline is Teapot Mountain. The lighter colored indistinctly stratified rocks under the dark dacite capping are the Whitetail conglomerate. Pinal County, Arizona. 1910. Plate 43-B in U.S. Geological Survey. Professional paper 115. 1919. #1:/Arizona-Professional paper 115/rfl00909 ID. Ransome, F.L. 909 Topography of the Ray area; Humboldt Hill from the south shows the effect of stoping in the thick mass of ore beneath the hill. Teapot Mountain is the distance. Pinal County, Arizona. 1910. Plate 44-A in U.S. Geological Survey. Professional paper 115. 1919. #1:/Arizona-Professional paper 115/rfl00911 ID. Ransome, F.L. 911 North up Mineral Creek from point near Ray, the cylindrical ore bin of the No. 2 mine, and the railway station are on the left. Pinal County, Arizona. 1910. Plate 43-A in U.S. Geological Survey. Professional paper 115. 1919. #1:/Arizona-Professional paper 115/rfl0915a ID. Ransome, F.L. 915a Surface equipment of the Inspiration Consolidated Copper Co: hoist and compressor house and coarse-crushing plant at the main shafts, looking northeast; photo courtesy of the company. Gila County, Arizona. Circa 1911. Plate 34-A in U.S. Geological Survey. Professional paper 115. 1919. #1:/Arizona-Professional paper 115/rfl00915 ID. Ransome, F.L. 915 Surface equipment of the Inspiration Consolidated Copper Co: on the left is the International smelter. The even slope of the Gila conglomerate is well shown in the background, and in the distance appears the Pinaleno Range, west of Solomsville. A small part of the Pinal Range is seen on the right. The view is nearly south; photo courtesy of the company. Gila County, Arizona. Circa 1911. Plate 34-B in U.S. Geological Survey. Professional paper 115. 1919. #1:/Professional paper 107-Utah/lgf0003a ID. Loughlin, G.F. 3a Eureka Peak from west slope of Godiva Mountain, Juab County, Utah. 1911. Plate 9-A in U.S. Geological Survey. Professional paper 107. 1919. #1:/Professional paper 107-Utah/lgf00003 ID. Loughlin, G.F. 3 Rhyolite hills east of Godiva Mountain from Sioux Peak; the highest cone-shaped hill, has an elevation of 7,007 feet. Juab County, Utah. 1911. Plate 9-B in U.S. Geological Survey. Professional paper 107. 1919. #1:/Professional paper 107-Utah/lgf00004 ID. Loughlin, G.F. 4 Form a panorama of East Tintic Mountains, looking north from Treasure Hill across Ruby Hollow. Juab County, Utah. 1911. Plate 6-B in U.S. Geological Survey. Professional paper 107. 1919. #1:/Professional paper 107-Utah/lgf00005 ID. Loughlin, G.F. 5 Form a panorama of East Tintic Mountains, looking north from Treasure Hill across Ruby Hollow. Juab County, Utah. 1911. Plate 6-B in U.S. Geological Survey. Professional paper 107. 1919. #1:/Professional paper 107-Utah/lgf00006 ID. Loughlin, G.F. 6 Form a panorama of East Tintic Mountains, looking north from Treasure Hill across Ruby Hollow. Juab County, Utah. 1911. Plate 6-B in U.S. Geological Survey. Professional paper 107. 1919. #1:/Professional paper 107-Utah/lgf00009 ID. Loughlin, G.F. 9 Form a panorama of Sunset and Volcano Ridge, looking south from Treasure Hill. Juab County, Utah. 1911. Plate 6-A in U.S. Geological Survey. Professional paper 107. 1919. #1:/Professional paper 107-Utah/lgf00010 ID. Loughlin, G.F. 10 Form a panorama of Sunset and Volcano Ridge, looking south from Treasure Hill. Juab County, Utah. 1911. Plate 6-A in U.S. Geological Survey. Professional paper 107. 1919. #1:/Professional paper 107-Utah/lgf00017 ID. Loughlin, G.F. 17 Packard Peak from limestone ridge west of Dagmer shaft. Juab County, Utah. 1911. Plate 8-A in U.S. Geological Survey. Professional paper 107. 1919. #1:/Professional paper 107-Utah/lgf00018 ID. Loughlin, G.F. 18 Foothills northwest of Eureka and head of Tintic valley: Juab County, Utah. 1911. Plate 8-B in U.S. Geological Survey. Professional paper 107. 1919. #1:/Professional paper 107-Utah/lgf00019 ID. Loughlin, G.F. 19 East-west fault south of saddle east of Quartzite Ridge: top bed of Tintic quartzite (outcrops, left and on ridge at right), with Ophir formation (below) and Teutonic limestone not faulted (on extreme right). Juab County, Utah. 1911. Plate 16-B, with graphics) in U.S. Geological Survey. Professional paper 107. 1919. #1:/Professional paper 107-Utah/lgf00020 ID. Loughlin, G.F. 20 Outcrop of Bluebird dolomite east of Herkimer shaft. Juab County, Utah. 1911. Plate 11-B in U.S. Geological Survey. Professional paper 107. 1919. #1:/Professional paper 107-Utah/lgf00025 ID. Loughlin, G.F. 25 Contact of quartz porphyry and monzonite (about center of photo) southeast of Robinson: Juab County, Utah. 1911. Plate 10-B in U.S. Geological Survey. Professional paper 107. 1919. #1:/Professional paper 107-Utah/lgf00073 ID. Loughlin, G.F. 73 Specimen of Dagmar limestone: Juab County, Utah. 1911. Plate 11 in U.S. Geological Survey. Professional paper 107. 1919. #1:/Professional paper 107-Utah/lgf0074a ID. Loughlin, G.F. 74a Specimen of Bluebird dolomite showing characteristic white markings: Juab County, Utah. 1911. Plate 12-A in U.S. Geological Survey. Professional paper 107. 1919. #1:/Professional paper 107-Utah/lgf0074b ID. Loughlin, G.F. 74b Specimen of Ajax dolomite showing relation between fossil remnants and clouding of surface: Utah. 1911. Plate 12-B in U.S. Geological Survey. Professional paper 107. 1919. #1:/Professional paper 107-Utah/lgf0097a ID. Loughlin, G.F. 97a Photomicrograph of monzonite porphyry from west slope of Sunrise Peak; plagioclase, biotite and augite, magnified 40 diameters, Juab County, Utah. 1911. Portion is plate 14- A, with graphics, in U.S. Geological Survey. Professional paper 107. 1919. #1:/Professional paper 107-Utah/lgf0097b ID. Loughlin, G.F. 97b Photomicrograph of latite porphyry from summit of Sunrise Peak; plagioclase, biotite and augite, magnified 40 diameters, Juab County, Utah. 1911. Portion is plate 14-b, with graphics, in U.S. Geological Survey. Professional paper 107. 1919. #1:/Professional paper 107-Utah/lgf0098a ID. Loughlin, G.F. 98a Photomicrograph of latite porphyry from ridge east of Treasure Hill; plagioclase (top left), biotite (bottom and right) with some augite, magnified 40 diameters, Juab County, Utah. 1911. Plate 15-A, with graphics, in U.S. Geological Survey. Professional paper 107. 1919. #1:/Professional paper 107-Utah/lgf0098b ID. Loughlin, G.F. 98b Photomicrograph of monzonite; plagioclase, orthoclase and augite, magnified 40 diameters, Juab County, Utah. 1911. Plate 15-B, with graphics, in U.S. Geological Survey. Professional paper 107. 1919. #1:/Professional paper 107-Utah/lgf00337 ID. Loughlin, G.F. 337 Varieties of oxidized zinc ores; A and B finely granular or replacement smithsonite, (see photos 338 and 339 for detail description), C finely banded smithsonite-calamine ore, May Day mine. The lighter broad bands originally represented smithsonite and the darker narrow bands calamine; but this specimen much of the smithsonite has been replaced by calamine. The dark patch represents leached portions stained with films of iron and manganese oxide, natural size, D (see photo 340 for details) and E, fibrous smithsonite with hydrozincite and fibrous calcite, May Day mine. Juab County, Utah. 1911. Plate 28 in U.S. Geological Survey. Professional paper 107. 1919. #1:/Professional paper 107-Utah/lgf00338 ID. Loughlin, G.F. 338 Finely granular or replacement smithsonite, photo 338, ore from May Day mine; shows numerous small cavities attributed to shrinkage, accompanying replacement. The cavities are partly filled with fine drusy smithsonite and a few by calamine. Photo 339, monheimite from Yankee mine; illustrates partial replacement along closely spaced bedding planes and cross fractures, and subsequent removal of unreplaced limestone, natural size. Juab County, Utah. 1911. Parts of plate 28 in U.S. Geological Survey. Professional paper 107. 1919. #1:/Professional paper 107-Utah/lgf00339 ID. Loughlin, G.F. 339 Finely granular or replacement smithsonite, photo 338, ore from May Day mine; shows numerous small cavities attributed to shrinkage, accompanying replacement. The cavities are partly filled with fine drusy smithsonite and a few by calamine. Photo 339, monheimite from Yankee mine; illustrates partial replacement along closely spaced bedding planes and cross fractures, and subsequent removal of unreplaced limestone, natural size. Juab County, Utah. 1911. Parts of plate 28 in U.S. Geological Survey. Professional paper 107. 1919. #1:/Professional paper 107-Utah/lgf00340 ID. Loughlin, G.F. 340 Fibrous smithsonite with hydrozincite and fibrous calcite, May Day mine; the calcite rests upon a finely botryoidal surface of smithsonite. The hydrozincite in this specimen is finely fibrous and forms a distinct layer between layers of smithsonite, natural size. Juab County, Utah. 1911. Part of plate 28 in U.S. Geological Survey. Professional paper 107. 1919. #1:/Utah-Professional paper 111/bbs00029 ID. Butler, B.S. 29 Rocky Range, physiographically old mountains, from O.K. mine. Beaver County, Utah. 1911. Plate 3-A in U.S. Geological Survey. Professional paper 111. 1920. #1:/Utah-Professional paper 111/bbs00066 ID. Butler, B.S. 66 Looking north along White and Buckeye Reefs, Silver Beef district. Washington County, Utah. 1911. Plate 47-B in U.S. Geological Survey. Professional paper 111. 1920. #1:/Utah-Professional paper 111/bbs00069 ID. Butler, B.S. 69 Looking south along back slope of White Reef, Silver Beef district. Washington County, Utah. 1911. Plate 47-B in U.S. Geological Survey. Professional paper 111. 1920. #1:/Utah-Professional paper 111/bbs00072 ID. Butler, B.S. 72 Looking north along White and Buckeye Reefs in the Silver Beef district; White Reef to the left, Buckeye on the right, Washington County, Utah. 1911. Plate 47-A in U.S. Geological Survey. Professional paper 111. 1920. #1:/Utah-Professional paper 111/bbs00075 ID. Butler, B.S. 75 Specimen of Silver ore from White Reef, Silver Beef district, showing fossil plant remains; pencil provides scale. Washington County, Utah. 1911. Plate 48-C in U.S. Geological Survey. Professional paper 111. 1920. #1:/Utah-Professional paper 111/bbs00132 ID. Butler, B.S. 132 In Mill D (south) Fork, Big Cottonwood Canyon, showing Cardiff and other mines; Cardiff mine (lower left), lower tunnel and Rexall mine (left center). Salt Lake County, Utah. 1911. Plate 28-A, with graphics, in U.S. Geological Survey. Professional paper 111. 1920. #1:/Utah-Professional paper 111/bbs00144 ID. Butler, B.S. 144 On north side of Little Cottonwood Canyon near Alta, Tom Moore tunnel (lower left center), Big City tunnel (center) and Michigan-Utah mine (upper right). Salt Lake County, Utah. 1911. Plate 28-B, with graphics, in U.S. Geological Survey. Professional paper 111. 1920. #1:/Utah-Professional paper 111/lgf00037 ID. Loughlin, G.F. 37 Form a panorama of Wasatch front, at Provo, showing shoreline of Lake Bonneville, and Slate canyon on the right. Utah County, Utah. 1912. Plate 31, shoreline noted and horse removed from published photo, in U.S. Geological Survey. Professional paper 111. 1920. #1:/Utah-Professional paper 111/lgf00038 ID. Loughlin, G.F. 38 Form a panorama of Wasatch front, at Provo, showing shoreline of Lake Bonneville, and Slate canyon on the right. Utah County, Utah. 1912. Plate 31, shoreline noted and horse removed from published photo, in U.S. Geological Survey. Professional paper 111. 1920. #1:/Utah-Professional paper 111/lgf00039 ID. Loughlin, G.F. 39 Form a panorama of Wasatch front, at Provo, showing shoreline of Lake Bonneville, and Slate canyon on the right. Utah County, Utah. 1912. Plate 31, shoreline noted and horse removed from published photo, in U.S. Geological Survey. Professional paper 111. 1920. #1:/Utah-Professional paper 111/lgf00043 ID. Loughlin, G.F. 43 Undulatory vertical fissures (tight) and horizontal fissures with quartz and chlorite in Pre- Cambrian granite, Sierra Madre district: looking south from Santa Maria tunnel, north- northeast of Ogden. Weber County, Utah. 1912. Plate 26-A in U.S. Geological Survey. Professional paper 111. 1920. #1:/Utah-Professional paper 111/lgf00045 ID. Loughlin, G.F. 45 Santa Maria mineralized fissure in Pre-Cambrian granite, fissure extends upward from (near center of photo). Sierra Madre district, northeast of Ogden. Weber County, Utah. 1912. Portion is plate 26-B in U.S. Geological Survey. Professional paper 111. 1920. #1:/Utah-Professional paper 111/lgf00047 ID. Loughlin, G.F. 47 Unconformity showing Pre-Cambrian granite and pegmatite dikes cut by basal Cambrian conglomerate, Sierra Madre district: head of north fork of Eldorado Canyon, on north slope of small branch ravine, 12 miles north-northeast of Ogden. Weber County, Utah. 1912. Portion is plate 25-B in U.S. Geological Survey. Professional paper 111. 1920. #1:/Utah-Professional paper 111/lgf00049 ID. Loughlin, G.F. 49 West front of Wasatch Range in Sierra Madre district, showing geologic formations; from top to bottom, Algonkian quartzite and schist, Middle Cambrian limestone, Cambrian quartzite and Pre-Cambrian granite: 12 miles north of Ogden, Sierra Madre mountains, Box Elder County, Utah. 1912. Plate 25-A in U.S. Geological Survey. Professional paper 111. 1920. #1:/Utah-Professional paper 111/lgf00066 ID. Loughlin, G.F. 66 Hanging valley, where Albert Ekker's canyon turns from east-to-west to a south-to- southwest course in Sheep Rock range, probably formed by recent faulting. Tooele County, Utah. 1912. Plate 12-B in U.S. Geological Survey. Professional paper 111. 1920. #1:/Utah-Professional paper 111/lgf00079 ID. Loughlin, G.F. 79 Form a panorama of west Tintic district in the vicinity of Scotia mine, showing characteristic exposure of geologic formations; limestone and quartzite, and granite stock (marked on unpublished photos 79 and 80 only). Juab County, Utah. 1911. Plate 38 in U.S. Geological Survey. Professional paper 111. 1920. #1:/Utah-Professional paper 111/lgf00080 ID. Loughlin, G.F. 80 Form a panorama of west Tintic district in the vicinity of Scotia mine, showing characteristic exposure of geologic formations; limestone and quartzite, and granite stock (marked on unpublished photos 79 and 80 only). Juab County, Utah. 1911. Plate 38 in U.S. Geological Survey. Professional paper 111. 1920. #1:/Utah-Professional paper 111/lgf00081 ID. Loughlin, G.F. 81 Form a panorama of west Tintic district in the vicinity of Scotia mine, showing characteristic exposure of geologic formations; limestone and quartzite, and granite stock (marked on unpublished photos 79 and 80 only). Juab County, Utah. 1911. Plate 38 in U.S. Geological Survey. Professional paper 111. 1920. #1:/Utah-Professional paper 111/lgf00086 ID. Loughlin, G.F. 86 Longitudinal or strike valley separating main Wasatch ridge at Provo Peaks from front hills; looking southeast from north branch at head of Rock Creek Canyon. Utah County, Utah. June 1913. Plate 32 in U.S. Geological Survey. Professional paper 111. 1920. #1:/Utah-Professional paper 111/lgf00089 ID. Loughlin, G.F. 89 Looking up Rock Creek canyon, showing recent fault along Wasatch Mountain front, Provo Peaks in the distance, near Provo. Utah County, Utah. Circa 1911. Plate 12-A in U.S. Geological Survey. Professional paper 111. 1920. #1:/Utah-Professional paper 111/lgf00255 ID. Loughlin, G.F. 255 Photomicrograph of a specimen of rock from Sheeprock, on the west on the west side of Tushar Range, showing banding of alunite and quartz; enlarged 30 diameters. Beaver County, Utah. 1911. Plate 21-A in U.S. Geological Survey. Professional paper 111. 1920. #1:/Idaho-Professional-paper 98/rpv00058 ID. Roundy, P.V. 58 View north along the west flank of the Caribou Range in the east-central part of the Freedom quadrangle, Bonneville County, Idaho. June 1915. Plate 14-A in U.S. Geological Survey. Professional paper 98. 1917. #1:/Idaho-Professional-paper 98/rpv00059 ID. Roundy, P.V. 59 Looking northeast along the ridge south of the head of Lanes Creek in the northwest part of Freedom quadrangle, Bonneville County, Idaho. June 1915. Plate 13-A in U.S. Geological Survey. Professional paper 98. 1917. #1:/Montana-Professional paper 120/caj00565 ID. Collier, A.J. 565 Pinnacle of soft sandstone of Lance Formation: T. 36 N., R. 51 E., Daniels County, Montana. 1915. Plate 5-A in U.S. Geological Survey. Professional paper 120. 1919. #1:/Montana-Professional paper 120/caj00566 ID. Collier, A.J. 566 Arenaceous sandstone, showing eolian cross bedding: T. 57 N., R. 51 E., Sheridan County, Montana. 1915. Plate 4-B in U.S. Geological Survey. Professional paper 120. 1919. #1:/Montana-Professional paper 120/caj00567 ID. Collier, A.J. 567 Erosion form of Lance formation: T. 37 N., R. 51 E., Sheridan County, Montana. 1915. Plate 5-B in U.S. Geological Survey. Professional paper 120. 1919. #1:/Montana-Professional paper 120/caj00574 ID. Collier, A.J. 574 Grain field in T. 36 N, 46 E., near Scobey, Daniels County, Montana. 1915. Plate 2-B in U.S. Geological Survey. Professional paper 120. 1919. #1:/Montana-Professional paper 120/caj00625 ID. Collier, A.J. 625 View up the valley of Cottonwood Creek, sec. 15, T. 35 N., R. 34 E, Phillips County, Montana. 1915. Plate 3-A in U.S. Geological Survey. Professional paper 120. 1919. #1:/Montana-Professional paper 120/caj00628 ID. Collier, A.J. 628 Camp in the foothills of the Little Rocky Mountains, sec. 14, T. 25 N., R. 25 E., Phillips County, Montana. 1915. Plate 2-C in U.S. Geological Survey. Professional paper 120. 1919. #1:/Montana-Professional paper 120/caj00631 ID. Collier, A.J. 631 South across the Missouri valley; Valley and Dasson Countries, Montana, 1915. Plate 6-A U.S. Geological Survey. Professional paper 120. 1919. #1:/Montana-Professional paper 120/caj00638 ID. Collier, A.J. 638 Badlands of Bearpaw shale, near Lismas: T. 36 N., R. 40 E., Valley County, Montana. 1915. #1:/Montana-Professional paper 120/caj00643 ID. Collier, A.J. 643 Gorge of Rock Creek; T.34 N., R.36 E. Valley County, Montana. 1915. Plate 2-A in U.S. Geological Survey. Professional paper 120. 1919. #1:/Montana-Professional paper 120/caj00696 ID. Collier, A.J. 696 Gravel pit at Wolf Point, Roosevelt County, Montana. 1915. Plate 6-B in U.S. Geological Survey. Professional paper 120. 1919. #1:/Montana-Professional paper 120/bal00092 ID. Beekly, A.L. 92 Log like concretion in Fort Union formation, 3 miles south of Culbertson, Roosevelt County, Montana. 1910. Plate 6-C in U.S. Geological Survey. Professional paper 120. 1919. #1:/Montana-Professional paper 120/cdd00185 ID. Condit, D.D. 185 Canyon of Indian Creek, Madison Range: showing cliffs of quartzite of the Phosphoria formation overlain by shaly Mesozoic beds. Madison County, Montana. 1916. Plate 11- A in U.S. Geological Survey. Professional paper 120. 1919. #1:/Montana-Professional paper 120/cdd00199 ID. Condit, D.D. 199 Principal peak in Snowcrest Range: consisting of Madison limestone (lowest exposures in view), overlain by shaly limestone of the Quadrant quartzite capped by quartzitic beds which form the talus slopes in the foreground. Madison County, Montana. 1916. Plate 11-B in U.S. Geological Survey. Professional paper 120. 1919. #1:/Montana-Professional paper 120/cdd00175 ID. Condit, D.D. 175 View westward along crest of Centennial Range from point near Montana principal meridian: Red Rock Lakes in distance. The rock are Phosphoria formation, Quadrant quartzite and Madison limestone. Beaverhead County, Montana. 1916. Plate 12-A in U.S. Geological Survey. Professional paper 120. 1919. #1:/Montana-Professional paper 120/cdd00177 ID. Condit, D.D. 177 Shaly calcareous beds along crest of Centennial Range: equivalent to Dinwoody formation in Wyoming. Montana. 1916. Plate 12-B in U.S. Geological Survey. Professional paper 120. 1919. #1:/Wyoming-Professional paper 120/cdd00157 ID. Condit, D.D. 157 North Face of Bannock Peak; showing Madison limestone and Quadrant quartzite at head of cirque valley, Yellowstone National Park, Wyoming. 1916. Plate 13-A in U.S. Geological Survey. Professional paper 120. 1919. #1:/Texas-Professional paper 120/slw00620 ID. Stephenson, L.W. 620 Woodbine sand in a cut of the Missouri, Kansas & Texas railway, 1.5 miles west by south of the station at Denison. The Woodbine here is partly indurated ferruginous sand, containing irregularly distributed thin limestone plates. Grayson County, Texas. Circa 1914. Plate 24-A in U.S. Geological Survey. Professional paper 120. 1919. #1:/Texas-Professional paper 120/slw00914 ID. Stephenson, L.W. 914 "Quarry" limestone, underlain by the Weno clay in a cut of the Frisco railroad .75 miles north of Denison, Grayson County, Texas. Circa 1914. Plate 23-B in U.S. Geological Survey. Professional paper 120. 1919. #1:/Texas-Professional paper 120/slw00915 ID. Stephenson, L.W. 915 Upper part of the Weno clay in a cut of the Frisco railroad a mile north of the station at Denison; a ledge of the "Quarry" limestone, which overlies the Weno, appears at the extreme top of the section. Grayson County, Texas. Circa 1914. Plate 22-B in U.S. Geological Survey. Professional paper 120. 1919. #1:/Texas-Professional paper 120/slw00920 ID. Stephenson, L.W. 920 Main street limestone in a cut of the Missouri, Kansas & Texas railway, 3 miles west of the station at Denison, Grayson County, Texas. Circa 1914. Plate 23-A in U.S. Geological Survey. Professional paper 120. 1919. #1:/Oklahoma-Professional paper 120/slw00926 ID. Stephenson, L.W. 926 Earthy facies of the lower part of the Fort Worth limestone on the Oklahoma side of Red River at the Missouri, Kansas and Texas railway bridge 5 miles north Denison, Marshall County, Oklahoma. Circa 1914. Plate 21-A in U.S. Geological Survey. Professional paper 120. 1919. #1:/Oklahoma-Professional paper 120/slw00928 ID. Stephenson, L.W. 928 Fossil fucoids (?) on the under side of a slab of Fort Worth limestone, at Red River, crossing of the Missouri, Kansas and Texas railway 5 miles north Denison, Marshall County, Oklahoma. Circa 1914. Plate 21-B in U.S. Geological Survey. Professional paper 120. 1919. #1:/Texas-Professional paper 120/slw00930 ID. Stephenson, L.W. 930 Top of Kiamichi clay, overlain by limestone member of Duck Creek formation, in bluff above Thomson ferry, Red River 11 miles, northwest of Denison, Grayson County, Texas. Circa 1914. Plate 20-A in U.S. Geological Survey. Professional paper 120. 1919. #1:/Texas-Professional paper 120/slw00932 ID. Stephenson, L.W. 932 Slabs of Gryphaea-bearing impure limestone from the upper part of the Kiamichi clay at the locality of slw00932; the shells belong chiefly to the species Gryphaea navia Hall. Grayson County, Texas. Circa 1914. Plate 20-B in U.S. Geological Survey. Professional paper 120. 1919. #1:/Texas-Professional paper 120/slw00936 ID. Stephenson, L.W. 936 Goodland limestone on Little Mineral Creek in northern Grayson County; the massive Goodland limestone is underlain by the Walnut shaly member (the undermined portion). Texas. Circa 1914. Plate 19-B in U.S. Geological Survey. Professional paper 120. 1919. #1:/Oklahoma-Professional paper 120/slw00988 ID. Stephenson, L.W. 988 Upper part of the Weno clay in the east bank of Washita River at the Frisco railroad bridge 2.25 miles west of Platter. The material exposed in the bank comprises shaly clay and subordinate interbedded layers of sandstone. Bryan County, Texas. December 8, 1917. Plate 22-A in U.S. Geological Survey. Professional paper 120. 1919. #1:/Texas-Professional paper 120/slw00917 ID. Stephenson, L.W. 917 Main street limestone underlain by the Pawpaw sandy member of the Denison formation near the subway south of the Missouri, Kansas & Texas railway, station at Denison. The Pawpaw member, as exposed at this locality in a headwater branch of Pawpaw Creek, comprises laminated crossbedded sand and clay. Grayson County, Texas. Circa 1914. Plate 24-B in U.S. Geological Survey. Professional paper 120. 1919. #1:/Texas-Professional paper 120/slw00924 ID. Stephenson, L.W. 924 Trinity sand and loose slabs of Goodland limestone at rock bluff (Old Marshall bluff) on Red River 8.5 miles northwest of Denison. The upper 150 feet of the Trinity is exposed in the bluff. The Goodland limestone, which immediately overlies the Trinity, forms a ledge along the crest of the bluff, and large masses of rocks broken from it have fallen down the slope, giving rise to the name Rock Bluff. Grayson County, Texas. Circa 1914. Plate 19-A in U.S. Geological Survey. Professional paper 120. 1919. #1:/Texas-Professional paper 120/slw00992 ID. Stephenson, L.W. 992 Sand and clay of the Woodbine formation at the Hyatts bluff, on Red River, 5 miles northwest of Ravenna, Fannin County, Texas. Circa 1914. Plate 25-A in U.S. Geological Survey. Professional paper 120. 1919. #1:/Texas-Professional paper 120/slw00980 ID. Stephenson, L.W. 980 Ferruginous sand of the Woodbine formation: in the Sherman road, 2 miles southwest of Denison, Grayson County, Texas. Circa 1914. Plate 25-B in U.S. Geological Survey. Professional paper 120. 1919. #1:/Texas-Professional paper 120/slw00979 ID. Stephenson, L.W. 979 Topography in the hilly area underlain by the Woodbine sand 1.75 miles southwest of Denison; looking northeast to the old waterworks plant. Grayson County, Texas. Circa 1914. Plate 26-A in U.S. Geological Survey. Professional paper 120. 1919. #1:/Texas-Professional paper 120/slw00978 ID. Stephenson, L.W. 978 Detail of topography in a small branch valley underlain by the Woodbine sand 1.5 miles southeast of Denison, Grayson County, Texas. Circa 1914. Plate 26-B in U.S. Geological Survey. Professional paper 120. 1919. #1:/Texas-Professional paper 120/slw00631 ID. Stephenson, L.W. 631 Contact between the Eagle Ford clay and the Austin chalk in a quarry of the Texas Portland Cement Co., 3 miles west of Dallas. The contact between the Eagle Ford and the Austin chalk is approximately marked by the crest of the prominent bench in the foreground. Dallas County, Texas. Circa 1914. Plate 27-A in U.S. Geological Survey. Professional paper 120. 1919. #1:/Texas-Professional paper 120/slw00989 ID. Stephenson, L.W. 989 "Fish-bed conglomerate" (?) in the bed of a branch 3 miles south of Ravenna; the indurated conglomeratic layer is immediately underlain by somewhat argillaceous fine marine sand, which here forms the topmost stratum of the Eagle Ford clay. Fannin County, Texas. Circa 1914. Plate 27-B in U.S. Geological Survey. Professional paper 120. 1919. #1:/Texas-Professional paper 120/slw00991 ID. Stephenson, L.W. 991 Annona tongue of Austin chalk in the bank of a creek, 5.5 miles west of Leonard; the beds, which dip perceptibly downstream, comprise massive layers of chalk interbedded with shaly layers 6 inches to 2 feet thick. Fannin County, Texas. Circa 1914. Plate 28-A in U.S. Geological Survey. Professional paper 120. 1919. #1:/Texas-Professional paper 120/slw00622 ID. Stephenson, L.W. 622 Building stone facies at top of Annona tongue of Austin chalk in an abandoned quarry 3 miles south of Honey Grove, Fannin County, Texas. Circa 1914. Plate 28-B in U.S. Geological Survey. Professional paper 120. 1919. #1:/Texas-Professional paper 120/slw00948 ID. Stephenson, L.W. 948 Basal beds of the Pecan Gap chalk in a cut of the Gulf, Colorado & Santa Fe railway, half a mile east of the station at Pecan Gap, Delta County, Texas. Circa 1914. Plate 29-A in U.S. Geological Survey. Professional paper 120. 1919. #1:/Texas-Professional paper 120/slw00945 ID. Stephenson, L.W. 945 Fossiliferous concretionary layers of calcareous sandstone in the Wolfe city sand in a cut of the Gulf, Colorado & Santa Fe railway, 1.5 miles east by north of Wolfe City, Hunt County, Texas. Circa 1914. Plate 29-A. in U.S. Geological Survey. Professional paper 120. 1919. #1:/New Mexico-Professional paper 122/pai01044 ID. Paige, S. 1044 Quaternary gravel faulted against rhyolite along the east side of Mangas valley, Grant County, New Mexico. 1915. Plate 3-B in U.S. Geological Survey. Professional paper 122. 1922. #1:/New Mexico-Professional paper 122/pai01318 ID. Paige, S. 1318 Fault contact between granite and gravel in St. Louis canyon: Grant County, New Mexico. 1915. Plate 3-A in U.S. Geological Survey. Professional paper 122. 1922. #1:/New Mexico-Professional paper 122/pai01312 ID. Paige, S. 1312 Hillside of siliceous iron-stained gossan: above the Sampson ore body. Grant County, New Mexico. 1915. Plate 5-B in U.S. Geological Survey. Professional paper 122. 1922. #1:/New Mexico-Professional paper 122/pai01326 ID. Paige, S. 1326 Copper Mountain, look northeast, Grant County, New Mexico. 1915. Plate 5-A in U.S. Geological Survey. Professional paper 122. 1922. #1:/Utah-Professional paper 129/rjb00039 ID. Reeside, J.B. Jr. 39 Upper part of Kaibab limestone and basal member (Rock Canyon) of Moenkopi formation: in Virgin Canyon 1.5 miles west of Virgin City, Washington County, Utah. 1919. Plate 9-C in U.S. Geological Survey. Professional paper 129. 1922. #1:/Utah-Professional paper 129/rjb00041 ID. Reeside, J.B. Jr. 41 Coconino sandstone and Kaibab limestone in Hurricane fault scarp, 6 miles south of Hurricane. The Supai formation may be represented at the base. Washington County, Utah. 1919. Plate 9-A in U.S. Geological Survey. Professional paper 129. 1922. #1:/Utah-Professional paper 129/rjb00042 ID. Reeside, J.B. Jr. 42 Middle part of scarp shown in rjbj004#1: Washington County, Utah. 1919. Plate 9-B in U.S. Geological Survey. Professional paper 129. 1922. #1:/Utah-Professional paper 129/rjb00059 ID. Reeside, J.B. Jr. 59 Shinarump conglomerate resting on upper Moenkopi shale and sandstone; Smith's mesa, 3 miles north of Virgin City, Washington County, Utah. 1919. Plate 13-A in U.S. Geological Survey. Professional paper 129. 1922. #1:/Utah-Professional paper 129/rjb00073 ID. Reeside, J.B. Jr. 73 Cross bedding in white upper part of massive Jurassic sandstone 12 miles north of St. George, on St. George-Modena Road. Washington County, Utah. 1919. Plate 11-A in U.S. Geological Survey. Professional paper 129. 1922. #1:/Utah-Professional paper 129/rjb00077 ID. Reeside, J.B. Jr. 77 Late basalt flow resting on a conglomerate of basalt and other boulders: on road from Toquerville to La Verkin, Washington County, Utah. 1919. Plate 13-B in U.S. Geological Survey. Professional paper 129. 1922. #1:/Utah-Professional paper 129/rjb00079 ID. Reeside, J.B. Jr. 79 Group of cinder cones of late date and associated lava, Diamond Valley 12 miles north of St. George, Washington County, Utah. 1919. Plate 12-A in U.S. Geological Survey. Professional paper 129. 1922. #1:/Utah-Professional paper 129/rjb00081 ID. Reeside, J.B. Jr. 81 Close view of larger cone shown in photo rjbj0079, Diamond Valley 12 miles north of St. George, Washington County, Utah. 1919. Plate 12-B in U.S. Geological Survey. Professional paper 129. 1922. #1:/Utah-Professional paper 129/rjb00088 ID. Reeside, J.B. Jr. 88 Northward toward Smith's mesa from a point just south of Virgin City; benches in foreground are the Virgin limestone member of the Moenkopi formation. Cliffs in background are the Moenkopi formation capped by the Shinarump conglomerate and supporting an outlier of the Chinle formation. The Shnabkaib shale member of the Moenkopi forms a conspicuous band. Washington County, Utah. 1919. Plate 10-A in U.S. Geological Survey. Professional paper 129. 1922. #1:/Utah-Professional paper 129/rjb00089 ID. Reeside, J.B. Jr. 89 Form a panorama along east side of Coalpits wash, near Grafton. The Shnabkaib member of the Moenkopi formation forms the foreground, with the upper dark red member of the Moenkopi and the Shinarump conglomerate above it: This is followed by the Chinle formation and the massive red and white burassic sandstone, which forms the West Temple of the Virgin (Steamboat Mountain) in the background. Washington County, Utah. 1919. Plate 10-B in U.S. Geological Survey. Professional paper 129. 1922. #1:/Utah-Professional paper 129/rjb00090 ID. Reeside, J.B. Jr. 90 Form a panorama along east side of Coalpits wash, near Grafton. The Shnabkaib member of the Moenkopi formation forms the foreground, with the upper dark red member of the Moenkopi and the Shinarump conglomerate above it: This is followed by the Chinle formation and the massive red and white burassic sandstone, which forms the West Temple of the Virgin (Steamboat Mountain) in the background. Washington County, Utah. 1919. Plate 10-B in U.S. Geological Survey. Professional paper 129. 1922. #1:/Utah-Professional paper 129/rjb00091 ID. Reeside, J.B. Jr. 91 Form a panorama along east side of Coalpits wash, near Grafton. The Shnabkaib member of the Moenkopi formation forms the foreground, with the upper dark red member of the Moenkopi and the Shinarump conglomerate above it: This is followed by the Chinle formation and the massive red and white burassic sandstone, which forms the West Temple of the Virgin (Steamboat Mountain) in the background. Washington County, Utah. 1919. Plate 10-B in U.S. Geological Survey. Professional paper 129. 1922. #1:/Utah-Professional paper 129/rjb00092 ID. Reeside, J.B. Jr. 92 Chinle formation and overlying massive Jurassic sandstone in Zion Canyon: above Springdale, Washington County, Utah. 1919. Plate 11-A in U.S. Geological Survey. Professional paper 129. 1922. #1:/Arizona-Professional paper 131/nlf00123 ID. Noble, L.F. 123 Typical exposure of Tapeats sandstone on Colorado River opposite mouth of Elves chasm, Shinumo quadrangle: Graphics identify from top to bottom; Muav limestone, Bright Angel, twin cliffs of snuff-colored dolomite of Bright Angel, Tapeats sandstone and Vishnu schists. This print is a halftone. Coconino County, Arizona. Circa 1920. Plate 21-A in U.S. Geological Survey. Professional paper 131. 1923. #1:/Arizona-Professional paper 131/nlf00125 ID. Noble, L.F. 125 Unconformity between Hermit shale and Supai formation at Red Top, on Hermit trail, Bright Angel quadrangle: Graphics from top to bottom identify, Kaibab limestone, Coconino sandstone, Hermit shale, Supai formation; artificial fill below trail. This print is a halftone. Coconino County, Arizona. Circa 1920. Plate 23-B in U.S. Geological Survey. Professional paper 131. 1923. #1:/Arizona-Professional paper 131/nlf00126 ID. Noble, L.F. 126 Unconformity between Hermit shale and Supai formation on trail, between Red Top and Dripping Spring, Bright Angel quadrangle: Graphics from top to bottom identify, Kaibab limestone, Coconino sandstone, Hermit shale and Supai formation. This print is a halftone. Coconino County, Arizona. Circa 1920. Plate 24-A in U.S. Geological Survey. Professional paper 131. 1923. #1:/Arizona-Professional paper 131/nlf00127 ID. Noble, L.F. 127 Typical exposure of Hermit shale in Tapeats amphitheater, Northeast of Powell Plateau, Kaibab quadrangle: Graphics from top to bottom identify, Kaibab limestone, Coconino sandstone, Hermit shale; d, e, f, subdivisions A, B, C, of Supai formation. This print is a halftone. Coconino County, Arizona. Circa 1920. Plate 24-B in U.S. Geological Survey. Professional paper 131. 1923. #1:/Arizona-Professional paper 131/nlf00129 ID. Noble, L.F. 129 Cedar Mountain, Vishnu quadrangle, from Desert View camp. Graphics from top to bottom identify, surface of Coconino Plateau, Shinarump conglomerate, capping Cedar Mountain, Moenkopi formation; Kaibab limestone. This print is a halftone. Coconino County, Arizona. Circa 1920. Plate 25-B in U.S. Geological Survey. Professional paper 131. 1923. #1:/Arizona-Professional paper 131/nlf00130 ID. Noble, L.F. 130 Unconformity between Temple Butte limestone and Muav limestone in west wall of canyon of Slate Creek, Shinumo quadrangle: Graphics from top to bottom identify; Redwall limestone, Temple Butte limestone, Muav limestone; y, z, subdivisions A, B of Muav limestone. Figure at sharp of unconformity provides scale. This print is a halftone. Coconino County, Arizona. Circa 1920. Plate 22-A in U.S. Geological Survey. Professional paper 131. 1923. #1:/Arizona-Professional paper 131/nlf00131 ID. Noble, L.F. 131 Unconformity between Temple Butte limestone and Muav limestone in west wall of canyon of Slate Creek, Shinumo quadrangle: Graphics from top to bottom identify; Redwall limestone, Temple Butte limestone, Muav limestone; y, z, subdivisions A, B of Muav limestone. This print is a halftone. Coconino County, Arizona. Circa 1920. Plate 22-B in U.S. Geological Survey. Professional paper 131. 1923. #1:/Arizona-Professional paper 131/nlf00132 ID. Noble, L.F. 132 Unconformity between Temple Butte limestone and Muav limestone in west wall of Turquoise canyon, Shinumo quadrangle: Graphics from top to bottom identify; Redwall limestone, Temple Butte limestone, conglomerate, Muav limestone; y, z, subdivisions A, B of Muav limestone. This print is a halftone. Coconino County, Arizona. Circa 1920. Plate 23-A in U.S. Geological Survey. Professional paper 131. 1923. #1:/Tennessee-Professional paper 139/kei00595 ID. Keith, A. 595 Metamorphic rocks of the Ducktown quadrangle: curved bodies of pseudodiorite in graywacke near the Polk County mine. Polk County, Tennessee. 1912. Plate 7-C in U.S. Geological Survey. Professional paper 139. 1926. #1:/Tennessee-Professional paper 139/kei00596 ID. Keith, A. 596 Recent erosion in the Ducktown district, general view near site of former roasting sheds. Photo by F.B. Laney. Polk County, Tennessee. 1912. Plate 2-A in U.S. Geological Survey. Professional paper 139. 1926. #1:/Tennessee-Professional paper 139/kei00598 ID. Keith, A. 598 Recent erosion in the Ducktown district, nearer view showing more detail, man in gully for scale. Photo by F.B. Laney. Polk County, Tennessee. 1912. Plate 2-B in U.S. Geological Survey. Professional paper 139. 1926. #1:/Tennessee-Professional paper 139/kei00599 ID. Keith, A. 599 Metamorphic rocks of the Ducktown quadrangle: folded quartz vein in fine-grained greywacke, on the north side of Ocoee River 1 mile below Tennessee Copper Co's smelter. Shows clearly the intense dynamic metamorphism to which the rocks, including the limestone lens or bed have been subjected. Photo by F.B. Laney. Polk County, Tennessee. 1912. Plate 6-A in U.S. Geological Survey. Professional paper 139. 1926. #1:/Tennessee-Professional paper 139/kei00600 ID. Keith, A. 600 Recent erosion in the Ducktown district, a short distance west of the Polk County mine. Photo by F.B. Laney. Polk County, Tennessee. 1912. Plate 3-A in U.S. Geological Survey. Professional paper 139. 1926. #1:/Tennessee-Professional paper 139/kei00601 ID. Keith, A. 601 Metamorphic rocks of the Ducktown quadrangle: false cleavage in schist near the Burra Burra mine. Photo by F.B. Laney. Polk County, Tennessee. 1912. Plate 6-B in U.S. Geological Survey. Professional paper 139. 1926. #1:/Tennessee-Professional paper 139/kei00617 ID. Keith, A. 617 Recent erosion in the Ducktown district, slope southwest of Ducktown showing protective cover of slate fragments. Photo by F.B. Laney. Polk County, Tennessee. 1912. Plate 4-B in U.S. Geological Survey. Professional paper 139. 1926. #1:/Tennessee-Professional paper 139/kei00618 ID. Keith, A. 618 Recent erosion in the Ducktown district: sand delta in Ocoee River at the mouth of Potato Creek. Photo by F.B. Laney. Polk County, Tennessee. 1912. Plate 5-A in U.S. Geological Survey. Professional paper 139. 1926. #1:/Tennessee-Professional paper 139/kei00619 ID. Keith, A. 619 Recent erosion in the Ducktown district, Potato Creek near Old Tennessee mine, showing debris clogged channel. Photo by F.B. Laney. Polk County, Tennessee. 1912. Plate 4-A in U.S. Geological Survey. Professional paper 139. 1926. #1:/Tennessee-Professional paper 139/kei00620 ID. Keith, A. 620 Recent erosion in the Ducktown district; land on Ocoee River a short distance below the denuded Ducktown area, covered with wind blown sand from the river. Photo by F.B. Laney. Polk County, Tennessee. 1912. Plate 5-B in U.S. Geological Survey. Professional paper 139. 1926. #1:/Tennessee-Professional paper 139/kei00621 ID. Keith, A. 621 Recent erosion in the Ducktown district, view from road between Ducktown and Isabella. Photo by F.B. Laney. Polk County, Tennessee. 1912. Plate 3-B in U.S. Geological Survey. Professional paper 139. 1926. #1:/Washington-Professional paper 140/bry00591 ID. Bryan, K. 591 Latah formation and fossil locality of Deep Creek Canyon; F.H. Knowlton (?) is man seating on boulder. Spokane County, Washington. 1923. Plate 3-A in U.S. Geological Survey. Professional paper 140. 1926. #1:/Washington-Professional paper 140/bry00613 ID. Bryan, K. 613 "Rim Rock" flows, Sunset Highway west of Spokane, Spokane County, Washington. 1923. Plate 4-A in U.S. Geological Survey. Professional paper 140. 1926. #1:/Washington-Professional paper 140/bry00629 ID. Bryan, K. 629 Pleasant Prairie. Spokane County, Washington. 1923. Photo 629 was retouched and is the left portion (Bryan 630 is right half) of plate 2-A in U.S. Geological Survey. Professional paper 140. 1926. #1:/Washington-Professional paper 140/bry00630 ID. Bryan, K. 630 Pleasant Prairie. Spokane County, Washington. 1923. Photo 629 was retouched and is the left portion (Bryan 630 is right half) of plate 2-A in U.S. Geological Survey. Professional paper 140. 1926. #1:/Utah-Professional paper 132/bry00500 ID. Bryan, K. 500 Looking northwest up Colorado River toward propose dam site near Lees Ferry. Canyon walls are formed by Wingate and Navajo sandstones; Todilto (?) formation is apparently absent. Coconino County, Arizona. 1921. Plate 8-A in U.S. Geological Survey. Professional paper 132. 1925. #1:/Washington-Professional paper 140/bry00597 ID. Bryan, K. 597 Valley flows on left bank of Spokane River, near Sevenmile, Washington. 1923. Plate 6- B in U.S. Geological Survey. Professional paper 140. 1926. #1:/Washington-Professional paper 140/bry00594 ID. Bryan, K. 594 Basalt cliffs at mouth of Deep Creek: Spokane County, Washington. 1923. Plate 7-A in U.S. Geological Survey. Professional paper 140. 1926. #1:/Washington-Professional paper 140/bry00593 ID. Bryan, K. 593 "Pillow" structures in the valley flows of Deep Creek canyon: Spokane County, Washington. 1923. Plate 7-B in U.S. Geological Survey. Professional paper 140. 1926. #1:/Washington-Professional paper 140/bry00599 ID. Bryan, K. 599 "The Cliff," near Milan, Spokane County, Washington. 1923. Plate 6-A in U.S. Geological Survey. Professional paper 140. 1926. #1:/Washington-Professional paper 140/bry00601 ID. Bryan, K. 601 End of basalt sill: Spokane County, Washington. 1923. Plate 5-C in U.S. Geological Survey. Professional paper 140. 1926. #1:/Washington-Professional paper 140/bry00603 ID. Bryan, K. 603 Lower contact of basalt sill with shale, Milwaukee cut no. 1, Spokane County, Washington. 1923. Plate 5-B in U.S. Geological Survey. Professional paper 140. 1926. #1:/Washington-Professional paper 140/bry00608 ID. Bryan, K. 608 Basalt dikes intruded into shale, S.P. & S. cut no. 4, Spokane County, Washington. 1923. Plate 5-A in U.S. Geological Survey. Professional paper 140. 1926. #1:/Washington-Professional paper 140/bry00610 ID. Bryan, K. 610 Contact of "Rim Rock" flows on Latah formation on Pleasant Prairie. Spokane County, Washington. 1923. Plate 6-C in U.S. Geological Survey. Professional paper 140. 1926. #1:/Washington-Professional paper 140/bry00721 ID. Bryan, K. 721 East side of Latah (Hangman) Creek valley south of Duncan: Spokane County, Washington. 1923. Plate 3-B in U.S. Geological Survey. Professional paper 140. 1926. #1:/Washington-Professional paper 140/bry00723 ID. Bryan, K. 723 Latah (now Hangman) Creek valley and the Columbia Plateau, form a panorama with Bryan 724: Spokane County, Washington. 1923. Plate 2-B in U.S. Geological Survey. Professional paper 140. 1926. #1:/Washington-Professional paper 140/bry00724 ID. Bryan, K. 724 Latah (now Hangman) Creek valley and the Columbia Plateau, form a panorama with Bryan 724: Spokane County, Washington. 1923. Plate 2-B in U.S. Geological Survey. Professional paper 140. 1926. #1:/Utah-Professional paper 132/mhd00444 ID. Miser, H.D. 444 Looking down San Juan Canyon, at a point between Clay Hill crossing and the mouth of Moonlight Creek; Coconino sandstone forms canyon walls. San Juan County, Utah. 1921. Plate 4-A in U.S. Geological Survey. Professional paper 132. 1925. Plate 8-C in U.S. Geological Survey. Bulletin 865. 1936. #1:/Utah-Professional paper 132/mhd00577 ID. Miser, H.D. 577 Looking down San Juan Canyon, at a point 9 miles by stream above Honaker Trail, canyon has been cut in Goodridge formation. San Juan County, Utah. 1921. Plate 3-A in U.S. Geological Survey. Professional paper 132. 1925. Plate 3-B in U.S. Geological Survey. Professional paper 188. 1938. Plate 2-B in U.S. Geological Survey. Water-supply paper 538. 1924. #1:/Utah-Professional paper 132/mhd00590 ID. Miser, H.D. 590 Looking down San Juan Canyon at the mouth of Slickhorn gulch; Coconino sandstone; Supai (?) formation and Goodridge formation (top to bottom) exposed, the rapid is produced by a boulder bar at mouth of Slickhorn gulch. Photo by Robert N. Allen. San Juan County, Utah. 1921. Plate 4-C in U.S. Geological Survey. Professional paper 132. 1925. Plate 18-B in U.S. Geological Survey. Bulletin 751. 1915. Plate 6-A in U.S. Geological Survey. Water-supply paper 538. 1924. #1:/Utah-Professional paper 132/mhd00599 ID. Miser, H.D. 599 Looking up San Juan canyon from a point near mouth of Clay Gulch. Platform is underlain by Shinarump conglomerate, but in foreground terrace gravels and landslide material rest on Shinarump. Moenkopi formation is exposed in lower part of canyon walls. Photo by Robert N. Allen. San Juan County, Utah. August 27, 1921. Plate 6-A in U.S. Geological Survey. Professional paper 132. 1925. Plate 8-A in U.S. Geological Survey. Water-supply paper 538. 1924. #1:/Utah-Professional paper 132/mhd00608 ID. Miser, H.D. 608 From a point half a mile south of Spencer camp, looking south down San Juan canyon toward Navajo Mountain. Canyon has been cut in Navajo, Todilto (?), Wingate and Chinle formations. Photo by Robert N. Allen. San Juan County, Utah. September 14, 1921. Plate 8-B in U.S. Geological Survey. Professional paper 132. 1925. Plate 12-A in U.S. Geological Survey. Water-supply paper 538. 1924. #1:/Utah-Professional paper 132/mhd00616 ID. Miser, H.D. 616 Looking northeast toward Wilson mesa from point on Wilson Creek, near San Juan Canyon; showing bare domes and "mosques" of Navajo sandstone. Todilto (?) formation underlies platform in foreground. Photo by Robert N. Allen. San Juan County, Utah. September 29, 1921. Plate 9-A in U.S. Geological Survey. Professional paper 132. 1925. #1:/Utah-Professional paper 132/mhd00624 ID. Miser, H.D. 624 Looking north across Colorado River at Lees Ferry. Small rounded knob to left stands on Shinarump conglomerate, which dips east. At the higher beds to the right form entire thickness of Chinle formation; Vermillion Cliffs in left background. Photo by Robert N. Allen. Coconino County, Arizona. October 16, 1921. Plate 7-B in U.S. Geological Survey. Professional paper 132. 1925. #1:/Utah-Professional paper 132/pai01378 ID. Paige, S. 1378 Looking down Green River toward its junction with Colorado River, San Juan and Wayne Counties, Utah. 1921. Plate 3-B in U.S. Geological Survey. Professional paper 132. 1925. #1:/Utah-Professional paper 132/pai01422 ID. Paige, S. 1422 Cataract Canyon of the Colorado River, Goodridge formation forms lower part of canyon walls and Coconino sandstone the upper part. These two formations are probably separated by beds that equivalent to the Supai (?) formation of the San Juan Canyon. San Juan County, Utah. 1921. Plate 3-C in U.S. Geological Survey. Professional paper 132. 1925. #1:/Utah-Professional paper 132/pai01456 ID. Paige, S. 1456 Sheer cliff of Navajo sandstone: at Warm Springs Creek on Colorado River. Utah. 1921. Plate 9-C in U.S. Geological Survey. Professional paper 132. 1925. #1:/Utah-Professional paper 132/pai01458 ID. Paige, S. 1458 Looking across Colorado River opposite Smiths Fork; show colossal domes of Navajo sandstone. Utah. 1921. Plate 9-B in U.S. Geological Survey. Professional paper 132. 1925. #1:/Washington-Professional paper 140/pjt00762 ID. Pardee, J.T. 762 Detail of columnar jointing in cut on Sunset Highway: Spokane County, Washington. 1923. Plate 4-B in U.S. Geological Survey. Professional paper 140. 1926. #1:/Colorado- Professional paper 132/sjd00123 ID. Sears, J.D. 123 Conglomerate in the lower part of the Wasatch formation at Sugarloaf Butte: sec. 15, T. 11 N., R. 101 W., Moffat County, Colorado. 1921. Plate 25-A in U.S. Geological Survey. Professional paper 132. 1925. #1:/Utah-Professional paper 132/winc0383 ID. Winchester, D.E. 383 Oil shale in the Green River formations: showing characteristic thin, regular bedding. Dragon quadrangle, Uintah County, Utah. 1916. Left photograph page 28, Images of the U.S. Geological Survey, 1879-1979. Plate 25-B in U.S. Geological Survey. Professional paper 132. 1925. Plate 11-A in U.S. Geological Survey. Bulletin 641. 1917. #1:/Alaska-Professional paper 132/swr00027 ID. Smith, W.R. 27 Mount Chiginagak: Lake and Peninsula County, Alaska. 1922. Plate 44-B in U.S. Geological Survey. Professional paper 132. 1925. #1:/Alaska-Professional paper 132/swr00035 ID. Smith, W.R. 35 Exposure of volcanic ash on Ray Creek: Lake and Peninsula County, Alaska. 1922. Plate 43-A in U.S. Geological Survey. Professional paper 132. 1925. #1:/Alaska-Professional paper 132/swr00034 ID. Smith, W.R. 34 Exposure of volcanic ash with Ray Creek (?) cutting through: Lake and Peninsula County, Alaska. 1922. Plate 43-B in U.S. Geological Survey. Professional paper 132. 1925. #1:/Alaska-Professional paper 132/swr00050 ID. Smith, W.R. 50 "The Gates" of Aniakchak Crater, : Lake and Peninsula County, Alaska. 1922. Plate 43- C in U.S. Geological Survey. Professional paper 132. 1925. #1:/Alaska-Professional paper 132/swr00048 ID. Smith, W.R. 48 Black Nose, a summit in Aniakchak Crater, Lake and Peninsula County, Alaska. 1922. Plate 44-A in U.S. Geological Survey. Professional paper 132. 1925. #1:/Wyoming-Professional paper 140/lwt00931 ID. Lee, W.T. 931 Remnants of Tower sandstone lentil of Green River formation capping "the Towers" about a mile northwest of Green River: Sweetwater County, Wyoming. Circa 1920. Plate 60-B in U.S. Geological Survey. Professional paper 140. 1926. #1:/Wyoming-Professional paper 145/hdf00015 ID. Hewett, D.F. 15 Local anticline lying in the trough of a major syncline, the rocks expose belong to the upper part of the Lance formation: sec. 26, T. 50 N., R. 101W. Park County, Wyoming. 1912. Plate 12-A in U.S. Geological Survey. Professional paper 145. 1926. #1:/Wyoming-Professional paper 145/hdf00026 ID. Hewett, D.F. 26 Unconformity between Meeteetse formation and Fort Union formation in the NE 1/4 sec, 14, T, 50 N., R. 100W. The basal sandstone of the Fort Union formWs the crest of the ridge, and the underlying beds are the upper part of the Meeteetse. At this point 1,300 feet of the Lance formation and several hundred feet of the Meeteetse formation have been eroded: forms a panorama with photo 27. Park County, Wyoming. 1912. Plate 13 in U.S. Geological Survey. Professional paper 145. 1926. #1:/Wyoming-Professional paper 145/hdf00027 ID. Hewett, D.F. 27 Unconformity between Meeteetse formation and Fort Union formation in the NE 1/4 sec, 14, T, 50 N., R. 100W. The basal sandstone of the Fort Union forms the crest of the ridge, and the underlying beds are the upper part of the Meeteetse. At this point 1,300 feet of the Lance formation and several hundred feet of the Meeteetse formation have been eroded: forms a panorama with photo 27. Park County, Wyoming. 1912. Plate 13 in U.S. Geological Survey. Professional paper 145. 1926. #1:/Wyoming-Professional paper 145/hdf00070 ID. Hewett, D.F. 70 Seasonal playa caused by damming a small watercourse by sand dunes, NW 1/4 sec. 16, T.52 N., R.101 W. Park County, Wyoming. 1912. Plate 4-C in U.S. Geological Survey. Professional paper 145. 1926. #1:/Wyoming-Professional paper 145/hdf00080 ID. Hewett, D.F. 80 Sandstone, clay and brown shale in the middle of the Meeteetse formation in sec. 4, T. 48 N., R. 100 W., 1 mile southeast of Meeteetse; stratigraphic section 104 measured in this locality. Park County, Wyoming. 1912. Plate 10-B in U.S. Geological Survey. Professional paper 145. 1926. #1:/Wyoming-Professional paper 145/hdf00084 ID. Hewett, D.F. 84 Massive sandstone of the Lance formation unconformably overlain by gravel of the Wasatch formation at the head of Iron Creek: sec. 8, T. 47 N., R. 100 W. Hot Springs County, Wyoming. 1912. Plate 10-D in U.S. Geological Survey. Professional paper 145. 1926. #1:/Wyoming-Professional paper 145/hdf00109 ID. Hewett, D.F. 109 Basal sandstone and coal-bearing portion of the Mesaverde formation at north end of Grass Creek basin: sec. 5, T. 46 N., R. 98 W. Hot Springs County, Wyoming. September 11, 1912. Plate 7-D in U.S. Geological Survey. Professional paper 145. 1926. #1:/Wyoming-Professional paper 145/hdf00112 ID. Hewett, D.F. 112 Detail view of the massive conglomerate at the base of the Fort Union: in sec. 22, T. 46N., R. 99 W. Park County, Wyoming. September 25, 1912. Plate 12-D in U.S. Geological Survey. Professional paper 145. 1926. #1:/Wyoming-Professional paper 145/hdf00113 ID. Hewett, D.F. 113 Massive conglomerate at the base of the Fort Union formation: in sec. 9. T.45 N., R. 99 W. Park County, Wyoming. September 25, 1912. Plate 12-C in U.S. Geological Survey. Professional paper 145. 1926. #1:/Wyoming-Professional paper 145/hdf00147 ID. Hewett, D.F. 147 Upper part of the Meeteetse formation and lower part of the Lance formation along escarpment of north side of Prospect Creek: T.45 N., R. 99W. Hot Springs County, Wyoming. September 11, 1913. Plate 10-C in U.S. Geological Survey. Professional paper 145. 1926. #1:/Wyoming-Professional paper 145/hdf00150 ID. Hewett, D.F. 150 Soft sand and clay of the upper part of the Lance formation overlain by the basal sandstone of the Fort Union formation half a mile northwest of Gwynn's Ranch: T. 46 N., R. 97 W. Hot Springs County, Wyoming. September 27, 1913. Plate 12-B in U.S. Geological Survey. Professional paper 145. 1926. #1:/Wyoming-Professional paper 145/hdf00151 ID. Hewett, D.F. 151 Beds of the upper part of the Fort Union formation and lower part of the Wasatch formation exposed in the ravine that cuts through Blue Ridge in sec. 5, T. 46 N., R. 97 W. The conspicuous bed near the middle of the section is the massive conglomerate that forms the base of the Wasatch in this region. Hot Springs County, Wyoming. September 29, 1913. Plate 16 in U.S. Geological Survey. Professional paper 145. 1926. #1:/Wyoming-Professional paper 145/hdf00244 ID. Hewett, D.F. 244 Southwest up the Greybull River valley 1 mile above Meeteetse in sec. 8, T.48 N., R.100W. Terraces of the Sunshine Stage are well shown on the left side of the valley. Park County, Wyoming. 1912. Plate 4-A in U.S. Geological Survey. Professional paper 145. 1926. #1:/New York-Professional paper 44/vac00033 ID. Veatch, A.C. 33 Horizontally stratified Tisbury (Manhasset) sand and gravel beds with included layer of boulder clay (dark colored band) Manhasset boulder bed, at King's sand pit, Hempstead Harbor, Nassau County, New York. March 15, 1903, plate 8-A in U.S. Geological Survey. Professional paper 44. 1906. #1:/New York-Professional paper 44/vac00036 ID. Veatch, A.C. 36 View showing head developed in the north shore artesian Jones well, Cold Spring Harbor, water flows freely over elbow in pipe. Nassau County, New York. 1903, plate 13-B in U.S. Geological Survey. Professional paper 44. 1906. #1:/New York-Professional paper 44/vac00050 ID. Veatch, A.C. 50 Bouldery portion of the Harbor Hill moraine near Creedmore, Long Island, New York. 1903, plate 9-B in U.S. Geological Survey. Professional paper 44. 1906. #1:/New York-Professional paper 44/vac00054 ID. Veatch, A.C. 54 Portion of the Harbor Hill outwash plain over the Tisbury terrace south of Huntington, the West and Half Hollow hills in the distance mark the southern limit of the ice and represent a portion of the Perrineville Wold with a slight morainal covering. Suffolk County, New York. May 13, 1903, plate 9-A in U.S. Geological Survey. Professional paper 44. 1906. #1:/New York-Professional paper 44/vac00057 ID. Veatch, A.C. 57 Cretaceous sandstone near base of Melville section. Long Island, New York. May 17, 1903, plate 4-b (inverted) in U.S. Geological Survey. Professional paper 44. 1906. #1:/New York-Professional paper 44/vac00058 ID. Veatch, A.C. 58 Mannetto gravel near top of Melville section, Long Island, New York. May 17, 1903, plate 4-A in U.S. Geological Survey. Professional paper 44. 1906. #1:/New York-Professional paper 44/vac00061 ID. Veatch, A.C. 61 View showing head developed in the north shore artesian Burgess Well, Oyster Bay, water rises within 1 foot of top of pipe, rod projecting above is aluminum gage used in observations on tidal fluctuations. Nassau County, New York. May 30,1903, plate 13-A in U.S. Geological Survey. Professional paper 44. 1906. #1:/New York-Professional paper 44/vac00072 ID. Veatch, A.C. 72 Head developed in a 40-foot artesian well belonging to the Citizen's Water-supply Company near Douglastown; water rises to within 1.5 feet of top of pipe. Box contains automatic gage used in study of tidal fluctuations in this well. Queens County, New York. August 6, 1903, plate 15 in U.S. Geological Survey. Professional paper 44. 1906. #1:/New York-Professional paper 44/vac00073 ID. Veatch, A.C. 73 Reading ammeter commutator clock, and battery box in use in the field, measuring underflow in Wautagh pond, Long Island, New York. August 14. 1903, plate 22-B in U.S. Geological Survey. Professional paper 44. 1906. #1:/Wyoming-Professional paper 145/weg00010 ID. Woodruff, E.G. 10 Basal sandstone of the Mesaverde formation in sec. 1, T.51 N., R.101 W.; showing character of uppermost beds of Cody shale and massive bedding of the lower sandstone of the Mesaverde. Park County, Wyoming. August 5, 1907. Plate 4-D in U.S. Geological Survey. Professional paper 145. 1926. #1:/Wyoming-Professional paper 145/weg00013 ID. Woodruff, E.G. 13 Fault between shale and sandy shale of middle part of Meeteetse formation (left) and massive sandstone of middle part of Mesaverde formation (right), sec. 2, T. 50 N., R.100 W., the stratigraphic displacement is 1,250. Park County, Wyoming. October 10, 1907. Plate 7-A in U.S. Geological Survey. Professional paper 145. 1926. #1:/Wyoming-Professional paper 145/weg00016 ID. Woodruff, E.G. 16 Sandstone and shale near the middle of the Meeteetse formation in sec. 33, T. 49 N., R. 100 W., 2 miles northwest of Meeteetse, Park County, Wyoming. 1907. Plate 10-A in U.S. Geological Survey. Professional paper 145. 1926. #1:/Michigan-Professional paper 144/bbs00182 ID. Butler, B.S. 182 Ridges produced by resistant flow, Greenstone Bluff, south of Phoenix, Keweenaw County, Michigan. Circa 1922. Plate 53-A in U.S. Geological Survey. Professional paper 144. 1929. #1:/Michigan-Professional paper 144/bbs00180 ID. Butler, B.S. 180 Ridges produced by resistant flow, Evergreen Bluffs, from Lake mine shaft. Forms a panorama with Butler 181. Michigan. Circa 1922. Plate 53-B in U.S. Geological Survey. Professional paper 144. 1929. #1:/Michigan-Professional paper 144/bbs00181 ID. Butler, B.S. 181 Ridges produced by resistant flow, Evergreen Bluffs, from Lake mine shaft. Forms a panorama with Butler 180. Michigan. Circa 1922. Plate 53-B in U.S. Geological Survey. Professional paper 144. 1929. #1:/Michigan-Professional paper 144/bbs0183c ID. Butler, B.S. 183c Texture of flow tops as seen in lodes: coalescing lode. Quincy Mine. Michigan. Circa 1922. Plate 58-C in U.S. Geological Survey. Professional paper 144. 1929. #1:/Michigan-Professional paper 144/bbs0183d ID. Butler, B.S. 183d Texture of flow tops as seen in lodes: banded coalescing lode. Quincy Mine. Michigan. Circa 1922. Plate 58-D in U.S. Geological Survey. Professional paper 144. 1929. #1:/Michigan-Professional paper 144/bbs0183f ID. Butler, B.S. 183f Texture of flow tops as seen in lodes: fragmented lode. Quincy Mine. Michigan. Circa 1922. Plate 58-F in U.S. Geological Survey. Professional paper 144. 1929. #1:/Michigan-Professional paper 144/bbs0189g ID. Butler, B.S. 189g Texture of flow tops as seen in lodes: fragmented lode. Quincy Mine. Michigan. Circa 1922. Plate 58-G in U.S. Geological Survey. Professional paper 144. 1929. #1:/Michigan-Professional paper 144/bbs0185d ID. Butler, B.S. 185d Texture and alteration of Calumet Hecla conglomerate lode: underground view of lode. Michigan. Circa 1922. Plate 72-D in U.S. Geological Survey. Professional paper 144. 1929. #1:/Michigan-Professional paper 144/bbs0185f ID. Butler, B.S. 185f Texture and alteration of Calumet Hecla conglomerate lode: underground view of lode showing bleaching of rock associated with copper, light bands copper bearing. Michigan. Circa 1922. Plate 72-F in U.S. Geological Survey. Professional paper 144. 1929. #1:/Michigan-Professional paper 144/bbs00186 ID. Butler, B.S. 186 No. 2 shaft house, Quincy mine. Houghton County, Michigan. Circa 1922. Plate 74-A in U.S. Geological Survey. Professional paper 144. 1929. #1:/Michigan-Professional paper 144/bbs00189 ID. Butler, B.S. 189 Shaft houses, Baltic mine. Michigan. Circa 1922. Plate 74-B in U.S. Geological Survey. Professional paper 144. 1929. #1:/Michigan-Professional paper 144/bbs00187 ID. Butler, B.S. 187 Looking north from Isle Royal mine to Quincy Hill over Portage Lake; photos form a panorama. Houghton County, Michigan. Circa 1922. Plate 74-C in U.S. Geological Survey. Professional paper 144. 1929. #1:/Michigan-Professional paper 144/bbs00188 ID. Butler, B.S. 188 Looking north from Isle Royal mine to Quincy Hill over Portage Lake; photos form a panorama. Houghton County, Michigan. Circa 1922. Plate 74-C in U.S. Geological Survey. Professional paper 144. 1929. #1:/Michigan-Professional paper 144/bbs00191 ID. Butler, B.S. 191 Shafts on Kearsarge lode, looking north from Centennial; photos form a panorama. Houghton County, Michigan. Circa 1922. Plate 75-A in U.S. Geological Survey. Professional paper 144. 1929. #1:/Michigan-Professional paper 144/bbs00192 ID. Butler, B.S. 192 Shafts on Kearsarge lode, looking north from Centennial; photos form a panorama. Houghton County, Michigan. Circa 1922. Plate 75-A in U.S. Geological Survey. Professional paper 144. 1929. #1:/Michigan-Professional paper 144/bbs00193 ID. Butler, B.S. 193 Form a panorama of North Bluff and shafts and dumps of Calico and Minesota lode. Ontonagon County, Michigan. Circa 1922. Plate 75-C in U.S. Geological Survey. Professional paper 144. 1929. #1:/Michigan-Professional paper 144/bbs00194 ID. Butler, B.S. 194 Form a panorama of North Bluff and shafts and dumps of Calico and Minesota lode. Ontonagon County, Michigan. Circa 1922. Plate 75-C in U.S. Geological Survey. Professional paper 144. 1929. #1:/Michigan-Professional paper 144/bbs00195 ID. Butler, B.S. 195 Form a panorama of North Bluff and shafts and dumps of Calico and Minesota lode. Ontonagon County, Michigan. Circa 1922. Plate 75-C in U.S. Geological Survey. Professional paper 144. 1929. #1:/Michigan-Professional paper 144/bbs0190a ID. Butler, B.S. 190a These 6 photos form a panorama of Calumet, showing shafts on Calumet Hecla conglomerate and Osceola amygdaloidal. Photo 190a, extreme left of panorama shows Tamarack shaft no. 5; North Tamarack and Red Jacket shaft. Houghton County, Michigan. Circa 1922. Plate 75-D in U.S. Geological Survey. Professional paper 144. 1929. #1:/Michigan-Professional paper 144/bbs0190b ID. Butler, B.S. 190b These 6 photos form a panorama of Calumet, showing shafts on Calumet Hecla conglomerate and Osceola amygdaloidal. Photo 190b, shows barely distinct buildings and land between Red Jacket Shaft and Calumet Shafts nos. 5 and 6. Houghton County, Michigan. Circa 1922. Plate 75-D in U.S. Geological Survey. Professional paper 144. 1929. #1:/Michigan-Professional paper 144/bbs0190c ID. Butler, B.S. 190c These 6 photos form a panorama of Calumet, showing shafts on Calumet Hecla conglomerate and Osceola amygdaloidal. Photo 190c: shows as chimneys on the horizon; Calumet Shafts nos. 5 and 6, Calumet shaft no.2 and Osceola shaft no.15. Houghton County, Michigan. Circa 1922. Plate 75-D in U.S. Geological Survey. Professional paper 144. 1929. #1:/Michigan-Professional paper 144/bbs0190d ID. Butler, B.S. 190d These 6 photos form a panorama of Calumet, showing shafts on Calumet Hecla conglomerate and Osceola amygdaloidal. Photo 190d: shows as chimneys on the horizon; Hecla shaft no. 6 and Osceola shaft no. 14. Houghton County, Michigan. Circa 1922. Plate 75-D in U.S. Geological Survey. Professional paper 144. 1929. #1:/Michigan-Professional paper 144/bbs0190e ID. Butler, B.S. 190e These 6 photos form a panorama of Calumet, showing shafts on Calumet Hecla conglomerate and Osceola amygdaloidal. Photo 190e: shows location on the horizon of; Hecla shaft no. 7 (left and of chimney) and (right) Hecla shaft no. 8 and Hecla shafts nos. 9 and 10 the distinct building at right. Houghton County, Michigan. Circa 1922. Plate 75- D in U.S. Geological Survey. Professional paper 144. 1929. #1:/Michigan-Professional paper 144/bbs0190f ID. Butler, B.S. 190f These 6 photos form a panorama of Calumet, showing shafts on Calumet Hecla conglomerate and Osceola amygdaloidal. Photo 190f: extreme right of panorama, shows location on the horizon of; Osceola shaft no. 6. Houghton County, Michigan. Circa 1922. Plate 75-D in U.S. Geological Survey. Professional paper 144. 1929. #1:Colorado-Professional paper 149/lwt01065 ID. Lee, W.T. 1065 Red bed in the north wall of (Big) Thompson Canyon west of Loveland; showing red Fountain arkose at extreme left, unconformably below a cliff of dark red sandstone formed by the basal member of the Ingleside formation, relatively soft shaly sandstone corresponding in position to the limestone member of the Ingleside, and a capping of Lyons sandstone at the extreme right. Larimer County, Colorado. 1922. Plate 9-B in U.S. Geological Survey. Professional paper 149. 1927. #1:/Colorado-Professional paper 149/lwt01347 ID. Lee, W.T. 1347 Dakota hogback 3 miles south of Golden, showing fire clay 8 feet thick, plant bearing sandstone, 8 feet, fire clay 15 feet, plant bearing sandstone and shale. On the slope to the right are variegated beds correlated with the lower shale of the Dakota group at Bellvue and conglomeratic sandstone, which probably represents the lower sandstone of that section. The beds in the foreground are offset a few feet to the left by faulting, and at the crest of the ridge faulting duplicates them. Jefferson County, Colorado. 1922. Plate 32- A, with graphics, in U.S. Geological Survey. Professional paper 149. 1927. Plate 6-A in U.S. Geological Survey. Bulletin 751. 1925. #1:/Colorado-Professional paper 149/lwt01345 ID. Lee, W.T. 1345 North wall of gap at Morrison, showing sandstone of the Dakota group at Bellvue, separated by a lens of shale; the base of the upper sandstone and the shaly, friable plant beating sandstone of the middle shale. Jefferson County, Colorado. 1922. Plate 32-B, with graphics, in U.S. Geological Survey. Professional paper 149. 1927. Plate 5-B in U.S. Geological Survey. Bulletin 751. 1925. #1:/Colorado-Professional paper 149/lwt01349 ID. Lee, W.T. 1349 Near view of the 8-foot sandstone shown in photo 1347, showing ripple marked face exposed by the removal of shale. Jefferson County, Colorado. 1922. Plate 32-C in U.S. Geological Survey. Professional paper 149. 1927. Plate 6-B in U.S. Geological Survey. Bulletin 751. 1925. #1:Colorado-Professional paper 149/lwt01733 ID. Lee, W.T. 1733 Cottonwood Canyon west of Loveland; showing the pink to orange colored cross-bedded sandstones of the lower Sundance; possibly including some of the Jelm, overlain by 210 feet of cherty limestone with thin beds of shale, partly or wholly of the Sundance. The Morrison formation appears at the right above the light colored limestone. Larimer County, Colorado. 1922. Plate 25-B, with graphics, in U.S. Geological Survey. Professional paper 149. 1927. #1:/Colorado-Professional paper 149/lwt01739 ID. Lee, W.T. 1739 Details of sandstone east of Lyons, that is correlated with the upper sandstone of the Dakota group at Bellvue; showing a hard quartzose layer resting on carbonaceous shaly sandstone. The lower dark colored material is full of small fragments of charcoal and impressions of twigs and variety of plant debris. Boulder County, Colorado. 1922. Plate 31-B in U.S. Geological Survey. Professional paper 149. 1927. Plate 3-A in U.S. Geological Survey. Bulletin 751. 1925. #1:Colorado-Professional paper 149/lwt01740 ID. Lee, W.T. 1740 Ridges in Thompson Canyon west of Loveland; showing rocks correlated by the writer with the Dakota group at Bellvue- the lower sandstone at the left, above a boulder covered slope of Morrison shale; the middle shale, between the two ridges; and the upper sandstone, at the right. The lower shale and middle sandstone are not exposed here. Larimer County, Colorado. 1922. Plate 29-B in U.S. Geological Survey. Professional paper 149. 1927. Plate 1-A in U.S. Geological Survey. Bulletin 751. 1925. #1:Colorado-Professional paper 149/lwt01745 ID. Lee, W.T. 1745 Mouth of (Big) Thompson Canyon west of Loveland; showing metamorphosed strata of Pre-Cambrian age standing nearly vertical, the hogback of Fountain formation appears in the middle distance. The angular contact of two represents all geologic time from Pre- Cambrian to Pennsylvanian. Larimer County, Colorado. 1922. Plate 3-A in U.S. Geological Survey. Professional paper 149. 1927. #1:Colorado-Professional paper 149/lwt01749 ID. Lee, W.T. 1749 Fountain arkose near Loveland: in west face of ridge north of (Big) Thompson River; overlain unconformably by the basal red sandstone member of the Ingleside formation. Larimer County, Colorado. 1922. Plate 10-A, with graphics, in U.S. Geological Survey. Professional paper 149. 1927. #1:Colorado-Professional paper 149/lwt01750 ID. Lee, W.T. 1750 Fountain arkose west of Loveland: showing west face of hogback ridge exposing arkose below and dark-red sandstone cliff of the lower member of the Ingleside formation at the crest, separated by an unconformity (?). Larimer County, Colorado. 1922. Plate 8-B in U.S. Geological Survey. Professional paper 149. 1927. #1:Colorado-Professional paper 149/lwt01767 ID. Lee, W.T. 1767 Steamboat Rock, Livermore quadrangle; showing the lower sandstone member of the Ingleside formation resting unconformably on Fountain arkose which occupies the debris covered slope at left. Larimer County, Colorado. 1922. Plate 10-B, with graphics, in U.S. Geological Survey. Professional paper 149. 1927. #1:Colorado-Professional paper 149/lwt01770 ID. Lee, W.T. 1770 Lyons sandstone at Lyons; the cross-bedding extends from the top nearly to the bottom of the formation, and the trees stand on the slightly eroded upper surface, or bedding plane. Boulder County, Colorado. 1922. Plate 17-A in U.S. Geological Survey. Professional paper 149. 1927. #1:Colorado-Professional paper 149/lwt01771 ID. Lee, W.T. 1771 Lyons sandstone at Lyons; the eastward sloping upper surface appears at the sky line and the westward sloping faces of the laminae exposed in the quarry appear in the foreground. Boulder County, Colorado. 1922. Plate 17-B in U.S. Geological Survey. Professional paper 149. 1927. #1:Colorado-Professional paper 149/lwt01772 ID. Lee, W.T. 1772 Lyons sandstone at Lyons; the face shows sharp boundaries between groups of cross- bedded layers and the truncation of the older layers before the younger ones were laid down, thus forming an angular unconformity in miniature. Boulder County, Colorado. 1922. Plate 17-C in U.S. Geological Survey. Professional paper 149. 1927. #1:Colorado-Professional paper 149/lwt01792 ID. Lee, W.T. 1792 Eldorado Springs, looking westward up the canyon, showing hills of hard massive red sandstone of the Fountain and Ingleside formations standing nearly vertical where cut by Eldorado Creek. Boulder County, Colorado. 1922. Plate 4-A in U.S. Geological Survey. Professional paper 149. 1927. #1:Colorado-Professional paper 149/lwt01798 ID. Lee, W.T. 1798 "Creamy" sandstone at Morrison, compare views of Lyons sandstone (lwt01770, lwt01771, or lwt01772) with which the creamy sandstone has been erroneously correlated. Jefferson County, Colorado. 1922. Plate 7-B in U.S. Geological Survey. Professional paper 149. 1927. #1:Colorado-Professional paper 149/lwt01828 ID. Lee, W.T. 1828 North wall of gap at Ingleside; showing limestone and red cross-bedded sandstone in the Ingleside formation, the covered slope at the left, is occupied by red sandstone of the lower member of the Ingleside formation, here shaly and soft, and the Fountain arkose. Larimer County, Colorado. 1922. Plate 9-A in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt01871 ID. Lee, W.T. 1871 Limestone quarry near Altus, showing the limestone member of the Ingleside formation upturned nearly vertical, the light colored bands indicate limestone; dark colored bands, brush covered sandstone and shale. The Fountain formation lies to the right and the "Red Beds" to the left. Laramie County, Wyoming. 1922. Plate 11-A in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt01892 ID. Lee, W.T. 1892 A scalloped hogback near Iron Mountain; showing outcrops of light colored limestone and dark red sandstone and shale of the Casper formation, the scalloped appearance is due to erosion on the inclined layers of limestone and shale. Laramie County, Wyoming. 1922. Plate 11-B in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt01874 ID. Lee, W.T. 1874 Limestone near the base of the "Red beds" upturned to a nearly vertical position near Horse Creek; correlated with the Forelle limestone of Laramie Basin. Laramie County, Wyoming. 1922. Plate 15-A in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt01954 ID. Lee, W.T. 1954 Limestone near the base of the "Red Beds" overlying red shale at the west end of Casper Mountain: fossils of Permian age were found here. These beds have been provisionally correlated with the Forelle limestone and Satanka shale. Natrona County, Wyoming. 1922. Plate16-A in U.S. Geological Survey. Professional paper 149. 1927. #1:Colorado-Professional paper 149/lwt01819 ID. Lee, W.T. 1819 Fountain arkose in Roxbury Park, southwest of Denver; because of irregularity in constitution and hardness the upturned beds are here eroded into a variety of picturesque monuments. Douglas County, Colorado. 1922. Plate 7-A in U.S. Geological Survey. Professional paper 149. 1927. #1:Colorado-Professional paper 149/lwt01821 ID. Lee, W.T. 1821 North wall of Soldier Canyon, near Loveland; showing at the left the sandstone, 36 feet thick, correlated by the writer with lower sandstone of the Dakota group at Bellvue; overlain by the lower variegated shale 32 feet (for scale note horses on slope); the middle sandstone 12 feet; the upper shale 234 feet; and the upper sandstone, 41 feet, at the crest of the ridge. Larimer County, Colorado. 1922. Plate 29-A in U.S. Geological Survey. Professional paper 149. 1927. #1:Colorado-Professional paper 149/lwt01825 ID. Lee, W.T. 1825 Conglomerate of the lower sandstone of the Dakota group about 2 miles north of Bellvue; resting unconformably on Morrison shale. Larimer County, Colorado. 1922. Plate 28-B, with graphics, in U.S. Geological Survey. Professional paper 149. 1927. #1:Colorado-Professional paper 149/lwt01827 ID. Lee, W.T. 1827 Two miles north of Owl Creek; showing orange-colored sandstone which probably corresponds to the Jelm formation; light-pink cross-bedded sandstone of the basal Sundance; thin bedded cherty limestone, ripple marked sandstone, and shale of the lower marine member of the Sundance; the Morrison formation; and at the top of the ridge the beds correlated with the Dakota group at Bellvue, Larimer County, Colorado. 1922. Plate 25-A, with graphics, in U.S. Geological Survey. Professional paper 149. 1927. #1:Colorado-Professional paper 149/lwt01861 ID. Lee, W.T. 1861 Lower part of Sundance formation south of Boxelder Creek, showing the basal cross- bedded sandstone and the overlying limestones and ripple-marked sandstones. Larimer County, Colorado. 1922. Plate 24-A in U.S. Geological Survey. Professional paper 149. 1927. #1:Colorado-Professional paper 149/lwt01866 ID. Lee, W.T. 1866 North wall of Boxelder Canyon at Greenacre ranch; showing Sundance sandstone resting on orange colored sandstone probably of the Jelm formation, and this on evenly stratified beds of the Lykins formation. Larimer County, Colorado. 1922. Plate 26-B in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt01882 ID. Lee, W.T. 1882 Ridges north of Chugwater Creek, near Iron Mountain, formed by sandstones correlated with the Dakota group at Bellvue. The main ridge shows the platy middle sandstone, with the conglomeratic lower sandstone in the slope to the left. The upper sandstone forms the smaller ridge to the right and middle shale crops out between the ridges. Laramie County, Wyoming. 1922. Plate 30-B in U.S. Geological Survey. Professional paper 149. 1927. Plate 4-A in U.S. Geological Survey. Bulletin 751. 1925. #1:/Wyoming-Professional paper 149/lwt01901 ID. Lee, W.T. 1901 North wall of North Platte canyon south of Douglas; showing evenly stratified Chugwater red beds; the light colored basal sandstone of the Sundance formation is about 100 feet thick; the three younger members of the Sundance in a series of step like ledges; a smooth slope occupied by the Morrison formation; and at the top the sandstone that is correlated with the Dakota group of the section at Bellvue, Colorado. Converse County, Wyoming. 1922. Plate 23-A in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt01906 ID. Lee, W.T. 1906 Near view of the lower sandstone member of the Sundance formation, in same locality as photo 1901, the sandstone is massive, vertically jointed, and nearly 100 feet thick. The softer shaly beds of the marine Sundance appear at left. Converse County, Wyoming. 1922. Plate 23-B in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt01916 ID. Lee, W.T. 1916 Ridge near Poison Lake, south of Douglas, at the right, massive conglomerate correlated with the lower sandstone of the Dakota group at Bellvue, Colorado; overlain by the variegated lower shale in the smooth slope to the left of the massive layer; the middle sandstone inconspicuously exposed, forming the highest point; the middle shale still farther to the left; and the upper sandstone forming the slope to the left of that. Converse County, Wyoming. 1922. Plate 30-A in U.S. Geological Surrvey. Professional paper 149. 1927. Plate 4-B in U.S. Geological Survey. Bulletin 751. 1925. #1:/Wyoming-Professional paper 149/lwt01948 ID. Lee, W.T. 1948 Canyon of the North Platte River near Pathfinder: the Cambrian quartzite (Deadwood formation) crops out at the river level. The Madison limestone rests unconformably on it, and unconformably beneath red beds of the Amsden formation. The well-stratified beds in the upper part of the walls are the upper part of the Amsden and the Tensleep sandstone. Carbon County, Wyoming. 1922. Plate 12-B in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt01959 ID. Lee, W.T. 1959 North face of Goose Egg Mountain, near Casper; showing the light colored rocks in the lower part of the "Red Beds" the Embar of the oil men; evenly bedded overlying the red bed of the Chugwater formation in the steep slope; the ledge of Alcova limestone, which contains fossil invertebrates of probable Triassic age; and the younger formations up to early Cretaceous, which forms the crest. Natrona County, Wyoming. 1922. Plate 19-B, with graphics, in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt01961 ID. Lee, W.T. 1961 Alcova limestone about 3 miles southeast of Alcova; shows its characteristic appearance in ledges above slopes of soft red sandstone and shale. Natrona County, Wyoming. 1922. Plate 21-A in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt01962 ID. Lee, W.T. 1962 Alcova limestone southeast of Alcova; a near view of the limestone on North Platte River, showing details of bedding, where invertebrates of probable Triassic age were found in it. Natrona County, Wyoming. 1922. Plate 21-B in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt01963 ID. Lee, W.T. 1963 Base if Morrison formation near Alcova, a soft friable gray sandstone, 60 feet thick, resting unconformably on marine Sundance beds and overlain by typical variegated shale of the Morrison formation. Natrona County, Wyoming. 1922. Plate 28-A, with graphics, in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt01970 ID. Lee, W.T. 1970 Light colored Sundance sandstone resting unconformably on Chugwater red beds about 1 mile northeast of Alcova. Natrona County, Wyoming. 1922. Plate 27-A, with graphics, in U.S. Geological Survey. Professional paper 149. 1927. #1:Colorado-Professional paper 149/lwt02155 ID. Lee, W.T. 2155 About 4 miles south of Greenacre Ranch on Boxelder Creek, showing Lyons sandstone, a strike valley eroded on red shale and a ridge formed by thin layers of limestone, one of which consists of limestone breccia. Larimer County, Colorado. 1922. Plate 15-B, with graphics, in U.S. Geological Survey. Professional paper 149. 1927. #1:Colorado-Professional paper 149/lwt02156 ID. Lee, W.T. 2156 Limestone breccia in the lower part of the Lykins formation: about 4 miles south of Greenacre ranch in Boxelder valley. Larimer County, Colorado. 1922. Plate 19-A in U.S. Geological Survey. Professional paper 149. 1927. #1:Colorado-Professional paper 149/lwt02157 ID. Lee, W.T. 2157 The side of a mesa on Boxelder Creek, valley in the foreground eroded in Lykins red beds; a light colored cliff of basal sandstone, of the Sundance; a series of thinly laminated Sundance beds above the cliff; and a steep slope of Morrison shale capped on the distant height by the sandstone that is correlated with the lower sandstone of the Dakota group at Bellvue. Larimer County, Colorado. 1922. Plate 26-A in U.S. Geological Survey. Professional paper 149. 1927. #1:Colorado-Professional paper 149/lwt02159 ID. Lee, W.T. 2159 "Red Beds" in Boxelder Canyon north of Table Mountain; showing several ledges of Lykins red sandstone (?) overlain unconformably by an orange colored sandstone which probably represents the Jelm formation. Larimer County, Colorado. 1922. Plate 22-A in U.S. Geological Survey. Professional paper 149. 1927. #1:Colorado-Professional paper 149/lwt02166 ID. Lee, W.T. 2166 Steamboat Rock, Livermore quadrangle, showing the resistant cross-bedded sandstone and limestone of the Ingleside formation rising as a ledge above the slope formed on the relatively soft Fountain arkose. Larimer County, Colorado. 1922. Plate 13-A in U.S. Geological Survey. Professional paper 149. 1927. #1:Colorado-Professional paper 149/lwt02175 ID. Lee, W.T. 2175 Fountain beds in the Casper formation near Steamboat Rock, Livermore quadrangle; showing beds of sandstone, arkose and conglomerate lying nearly horizontal. Larimer County, Colorado. 1922. Plate 8-A in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt02179 ID. Lee, W.T. 2179 Cross-bedded sandstone in the lower part of the Sundance formation at "Steamboat Lake" (now drained): Laramie Basin, Albany County, Wyoming. 1922. Plate 24-B in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt02190 ID. Lee, W.T. 2190 A wind formed well in the top of one of the Red Buttes near Laramie; the rock is cross- bedded red sandstone near the base of the Ingleside equivalent in the Casper formation. Albany County, Wyoming. 1922. Plate 13-B in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt02204 ID. Lee, W.T. 2204 A mile west of Difficulty; showing a hard sandstone at the top of the Casper formation, a valley formed on red Satanka (?) shale, a sharp ridge of Forelle limestone, called Minnekahta by Darton, a valley eroded in gypsiferous red shale, and a ridge formed by a limestone breccia. Carbon County, Wyoming. 1922. Plate 18-A, with graphics, in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt02206 ID. Lee, W.T. 2206 Near view of the "crinkled" limestone about 2 miles west of Difficulty; Forelle (?), called Minnekahta by Darton. Carbon County, Wyoming. 1922. Plate 18-B in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt02209 ID. Lee, W.T. 2209 Upper part of the "Red Beds" at north end of Rawlins Hills, the Alcova limestone and the Sundance sandstone do not appear in the view. Carbon County, Wyoming. 1922. Plate 22-A in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt02214 ID. Lee, W.T. 2214 Whiskey Gap, looking north, the ridge is formed by Tensleep sandstone, Amsden sandstone and limestone, Madison limestone and Deadwood formation. Carbon County, Wyoming. 1922. Plate 6-A in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt02217 ID. Lee, W.T. 2217 Independence Rock on Sweetwater River, showing exfoliation in massive granite. Natrona County, Wyoming. 1922. Plate 3-A in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt02226 ID. Lee, W.T. 2226 Canyon wall at east end of Casper Mountain; showing Madison limestone, basal part of Casper formation, equivalent to red beds of Amsden formation and overlying sandstone and limestone of the Casper formation. Natrona County, Wyoming. 1922. Plate 6-B, with graphics, in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt02230 ID. Lee, W.T. 2230 Bluff at the west end of Casper Mountain; showing massive light colored sandstone at the base of the Sundance formation resting unconformably on laminated orange and salmon- colored sandstone of the Chugwater red beds. The Alcova limestone marine, probably Triassic, occurs here a few feet below the rocks shown in the view. Natrona County, Wyoming. 1922. Plate 27-B, with graphics, in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt02233 ID. Lee, W.T. 2233 Deadwood formation on Casper Mountain, south of Casper: in first canyon east of old asbestos mill. Natrona County, Wyoming. 1922. Plate 4-B in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt02236 ID. Lee, W.T. 2236 Sandstone and sandy limestone at the top of Casper Mountain, east of the old asbestos mill; correspond in position to the Tensleep sandstone. Natrona County, Wyoming. 1922. Plate 12-A in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt02240 ID. Lee, W.T. 2240 Near view of the limestone provisionally correlated with the Forelle at the mouth of Boxelder Canyon, west of Douglas. Converse County, Wyoming. 1922. Plate 16-B in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt02253 ID. Lee, W.T. 2253 Canyon of Little Popo Agie River south of Lander; showing walls of Tensleep sandstone and gentle slopes above the cliff formed on the Phosphoria beds. Fremont County, Wyoming. 1922. Plate 14-B, with graphics, in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt02260 ID. Lee, W.T. 2260 Exposure at the mouth of the canyon of the Big Horn River near Thermopolis, showing a ledge formed by the top limestone of the Phosphoria formation overlain by pink to yellow shale containing gypsum and thin layers of limestone. The yellow beds are litho logically distinct from the underlying massive limestone and probably younger than Dinwoody, although Blackwelder and others have correlated them with the Dinwoody formation of the Wind River Mountains. Hot Springs County, Wyoming. 1922. Plate 14-A, with graphics, in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt02278 ID. Lee, W.T. 2278 Red rocks of the middle part of the Cloverly formation near Sheldon Ranch, northeast of Greybull; showing the "badland" forms of erosion characteristic of this formation. Big Horn County, Wyoming. 1922. Plate 35-A in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt2288a ID. Lee, W.T. 2288a Down the canyon of Middle Fork of Popo Agie River, near Lander; showing walls composed of hard layers of limestone and sandstone ranging in age from Cambrian to Permian. The prominent ledge at the skyline is composed of sandstone and limestone of Pennsylvania age. Photos lwt228a, lwt2288b and lwt2288c form this panorama. Fremont County, Wyoming. 1922. Plate 5-A in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt2288b ID. Lee, W.T. 2288b Down the canyon of Middle Fork of Popo Agie River, near Lander; showing walls composed of hard layers of limestone and sandstone ranging in age from Cambrian to Permian. The prominent ledge at the skyline is composed of sandstone and limestone of Pennsylvania age. Photos lwt228a, lwt2288b and lwt2288c form this panorama. Fremont County, Wyoming. 1922. Plate 5-A in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt2288c ID. Lee, W.T. 2288c Down the canyon of Middle Fork of Popo Agie River, near Lander; showing walls composed of hard layers of limestone and sandstone ranging in age from Cambrian to Permian. The prominent ledge at the skyline is composed of sandstone and limestone of Pennsylvania age. Photos lwt2288a, lwt2288b and lwt2288c form this panorama. Fremont County, Wyoming. 1922. Plate 5-A in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt2289a ID. Lee, W.T. 2289a Panoramic view up the canyon of Middle Fork of Popo Agie River at its junction with Mill Creek; showing conspicuous walls and dip slopes of Pennsylvanian sandstone (Tensleep of this region) and relatively smooth slopes formed on the overlying Phosphoria beds. Photos lwt2289a, lwt2289b and lwt2289c form this panorama. Fremont County, Wyoming. 1922. Plate 5-B in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt2289b ID. Lee, W.T. 2289b Panoramic view up the canyon of Middle Fork of Popo Agie River at its junction with Mill Creek; showing conspicuous walls and dip slopes of Pennsylvanian sandstone (Tensleep of this region) and relatively smooth slopes formed on the overlying Phosphoria beds. Photos lwt2289a, lwt2289b and lwt2289c form this panorama. Fremont County, Wyoming. 1922. Plate 5-B in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt2289c ID. Lee, W.T. 2289c Panoramic view up the canyon of Middle Fork of Popo Agie River at its junction with Mill Creek; showing conspicuous walls and dip slopes of Pennsylvanian sandstone (Tensleep of this region) and relatively smooth slopes formed on the overlying Phosphoria beds. Photos lwt2289a, lwt2289b and lwt2289c form this panorama. Fremont County, Wyoming. 1922. Plate 5-B in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt2291a ID. Lee, W.T. 2291a Form a panorama of Big Horn Hot Spring, Thermopolis; looking east across Big Horn River and the terraces of travertine to the "Red Beds' which are inclined southward on the flank of a sharp anticline whose apex lies to the left. From this anticline 18,600,000 gallons of sulphur water issues every 24 hours, having a temperature of 135 degrees F, and carrying calcium carbonate and other mineral matter in solution. In the distance in order from left to right, are the older Chugwater red beds, the Alcova marine limestone, gypsum and shale of the upper part of the Chugwater, the marine Sundance formation, (the basal sandstone is absent here), the Morrison formation and the sandstone correlated with the lower sandstone of the Dakota group. Photos, Hot Springs County, Wyoming. 1922. Plate 20-A, with graphic, in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt2291b ID. Lee, W.T. 2291b Form a panorama of Big Horn Hot Spring, Thermopolis; looking east across Big Horn River and the terraces of travertine to the "Red Beds' which are inclined southward on the flank of a sharp anticline whose apex lies to the left. From this anticline 18,600,000 gallons of sulphur water issues every 24 hours, having a temperature of 135 degrees F, and carrying calcium carbonate and other mineral matter in solution. In the distance in order from left to right, are the older Chugwater red beds, the Alcova marine limestone, gypsum and shale of the upper part of the Chugwater, the marine Sundance formation, (the basal sandstone is absent here), the Morrison formation and the sandstone correlated with the lower sandstone of the Dakota group. Hot Springs County, Wyoming. 1922. Plate 20-A, with graphic, in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt2291c ID. Lee, W.T. 2291c Form a panorama of Big Horn Hot Spring, Thermopolis; looking east across Big Horn River and the terraces of travertine to the "Red Beds' which are inclined southward on the flank of a sharp anticline whose apex lies to the left. From this anticline 18,600,000 gallons of sulphur water issues every 24 hours, having a temperature of 135 degrees F, and carrying calcium carbonate and other mineral matter in solution. In the distance in order from left to right, are the older Chugwater red beds, the Alcova marine limestone, gypsum and shale of the upper part of the Chugwater, the marine Sundance formation, (the basal sandstone is absent here), the Morrison formation and the sandstone correlated with the lower sandstone of the Dakota group. Hot Springs County, Wyoming. 1922. Plate 20-A, with graphic, in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt2291d ID. Lee, W.T. 2291d Form a panorama of Big Horn Hot Spring, Thermopolis; looking east across Big Horn River and the terraces of travertine to the "Red Beds' which are inclined southward on the flank of a sharp anticline whose apex lies to the left. From this anticline 18,600,000 gallons of sulphur water issues every 24 hours, having a temperature of 135 degrees F, and carrying calcium carbonate and other mineral matter in solution. In the distance in order from left to right, are the older Chugwater red beds, the Alcova marine limestone, gypsum and shale of the upper part of the Chugwater, the marine Sundance formation, (the basal sandstone is absent here), the Morrison formation and the sandstone correlated with the lower sandstone of the Dakota group. Hot Springs County, Wyoming. 1922. Plate 20-A, with graphic, in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt2291e ID. Lee, W.T. 2291e Form a panorama of Big Horn Hot Spring, Thermopolis; looking east across Big Horn River and the terraces of travertine to the "Red Beds' which are inclined southward on the flank of a sharp anticline whose apex lies to the left. From this anticline 18,600,000 gallons of sulphur water issues every 24 hours, having a temperature of 135 degrees F, and carrying calcium carbonate and other mineral matter in solution. In the distance in order from left to right, are the older Chugwater red beds, the Alcova marine limestone, gypsum and shale of the upper part of the Chugwater, the marine Sundance formation, (the basal sandstone is absent here), the Morrison formation and the sandstone correlated with the lower sandstone of the Dakota group. Hot Springs County, Wyoming. 1922. Plate 20-A, with graphic, in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt2292a ID. Lee, W.T. 2292a "Red Beds" about 10 miles southeast of Thermopolis, the sagebrush slope in the foreground is formed in the soft gypsiferous shale beneath the Chugwater red beds; halfway up the bluff at the left is a massive red sandstone with shaly beds above and below; still higher is the Alcova limestone, to thin to appear prominent at this distance, and the upper gypsiferous beds. Near the center (photo lwt2292b) in the distance are the Sundance and Morrison formations, capped by Cloverly sandstone, which appears at the skyline. Hot Springs County, Wyoming. 1922. Plate 20-B in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt2292b ID. Lee, W.T. 2292b "Red Beds" about 10 miles southeast of Thermopolis, the sagebrush slope in the foreground is formed in the soft gypsiferous shale beneath the Chugwater red beds; halfway up the bluff at the left is a massive red sandstone with shaly beds above and below; still higher is the Alcova limestone, to thin to appear prominent at this distance, and the upper gypsiferous beds. Near the center (photo lwt2292b) in the distance are the Sundance and Morrison formations, capped by Cloverly sandstone, which appears at the skyline. Hot Springs County, Wyoming. 1922. Plate 20-B in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt2292c ID. Lee, W.T. 2292c "Red Beds" about 10 miles southeast of Thermopolis, the sagebrush slope in the foreground is formed in the soft gypsiferous shale beneath the Chugwater red beds; halfway up the bluff at the left is a massive red sandstone with shaly beds above and below; still higher is the Alcova limestone, to thin to appear prominent at this distance, and the upper gypsiferous beds. Near the center (photo lwt2292b) in the distance are the Sundance and Morrison formations, capped by Cloverly sandstone, which appears at the skyline. Hot Springs County, Wyoming. 1922. Plate 20-B in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt02322 ID. Lee, W.T. 2322 Bluff near No Wood, showing conglomeratic sandstone of lower part of Cloverly formation resting on Morrison shale. County, Wyoming. 1922. Plate 34-A in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt02323 ID. Lee, W.T. 2323 Near view of bluff near No Wood: showing irregular plane of contact between Morrison and Cloverly formations. County, Wyoming. 1922. Plate 34-B in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt02329 ID. Lee, W.T. 2329 Conglomeratic sandstone regarded by the writer as the base of the Cloverly formation south of Hyattville, resting on the carbonaceous shale, which separates it from the Morrison. Big Horn County, Wyoming. 1922. Plate 34-C in U.S. Geological Survey. Professional paper 149. 1927. #1:/Wyoming-Professional paper 149/lwt02363 ID. Lee, W.T. 2363 Bluff southeast of Cody; showing dark shale between Morrison formation and the Cloverly formation; Sundance formation. Park County, Wyoming. 1922. Plate 35-B, with graphics, in U.S. Geological Survey. Professional paper 149. 1927. #1:/Idaho-Professional paper 152/mgr00003 ID. Mansfield, G.R. 3 Drag folds on Waterloo Hill, secs. 5 and 6, T. 13 S. R. 45 E., Montpelier quadrangle; looking southwest. Wells formation; Phosphoria phosphatic shale; Rex chert member of Phosphoria formation; Woodside shale. Plate 50-B, with graphics, in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00010 ID. Mansfield, G.R. 10 Overturned and faulted fold at the mouth of Swan Lake Gulch (north side) T. 9 S., R. 43 E., Slug Creek quadrangle; Brazer limestone: Wells formation; Phosphoria phosphatic shales; Rex chert member of Phosphoria formation; Woodside shale. Ink marks on the photograph closely resemble the graphics on the published version. Caribou County, Idaho. 1910. Plate 46-A, with graphics, in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00017 ID. Mansfield, G.R. 17 View in Aspen Range northward across south Sulphur Canyon, T. 9 S., R.43 E. Slug Creek quadrangle, the Gannett and younger erosion surfaces are cut by canyons of the Blackfoot cycle; ledges at top of Wells formation. Caribou County, Idaho. 1910. Plate 21-A, with graphics, in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00032 ID. Mansfield, G.R. 32 Southeastward in the Aspen Range from the head of Middle Sulphur Canyon, T. 9 S, R. 43 E., Slug Creek quadrangle; showing Gannett erosion surface (?), Elk Valley cycle, Dry Fork cycle and Blackfoot cycle. Caribou County, Idaho. 1910. Plate 29-B, with graphics, in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00033 ID. Mansfield, G.R. 33 Southeastward in the Aspen Range from the head of Middle Sulphur Canyon, T. 9 S, R. 43 E., Slug Creek quadrangle; showing Gannett erosion surface (?), Elk Valley cycle, Dry Fork cycle and Blackfoot cycle. Caribou County, Idaho. 1910. Plate 29-B, with graphics, in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00051 ID. Mansfield, G.R. 51 Drag fold in Wells formation and phosphatic shale: in NW 1/4 SW 1/4 sec. 25, T. 10 S., R. 44 E., Slug Creek quadrangle, Bear Lake County, Idaho. June 11, 1911. Plate 48-B in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00054 ID. Mansfield, G.R. 54 Form panorama from southward pointing spur on hill north of Georgetown Canyon, looking northeast to south; Mississippian limestone; Wells formation; Nugget sandstone; Twin Creek limestone. Bear Lake County, Idaho. July 3, 1911. Plate 38-A, with graphics, in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr0054a ID. Mansfield, G.R. 54a Form panorama from southward pointing spur on hill north of Georgetown Canyon, looking northeast to south; Mississippian limestone; Wells formation; Nugget sandstone; Twin Creek limestone. Bear Lake County, Idaho. July 3, 1911. Plate 38-A, with graphics, in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00055 ID. Mansfield, G.R. 55 Form panorama from southward pointing spur on hill north of Georgetown Canyon, looking northeast to south; Mississippian limestone; Wells formation; Nugget sandstone; Twin Creek limestone. Bear Lake County, Idaho. July 3, 1911. Plate 38-A, with graphics, in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00056 ID. Mansfield, G.R. 56 Form panorama from southward pointing spur on hill north of Georgetown Canyon, looking northeast to south; Mississippian limestone; Wells formation; Nugget sandstone; Twin Creek limestone. Bear Lake County, Idaho. July 3, 1911. Plate 38-A, with graphics, in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00060 ID. Mansfield, G.R. 60 Well formation, sec. 5, T. 10 S., R. 44 E., Slug Creek quadrangle; showing characteristic interbedding of sandstone and cherty limestone (largely silicified) Bear Lake County, Idaho. July 8, 1911. Plate 26 in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00061 ID. Mansfield, G.R. 61 Cliffs at top of Wells formation, west side of Slug Valley, sec. 18, T. 9 S., R. 44 E. Down faulted Triassic rocks on left; Carboniferous rocks in distance. The phosphatic shale has been largely eroded from the top of the Wells formation. Caribou County, Idaho. July 11, 1911. Plate 48-A in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00068 ID. Mansfield, G.R. 68 Panorama of ridge extending from sec. 14 through sec. 3, T. 8 S., R. 44 E., Slug Creek quadrangle; showing dip slope of Rex chert member (68 and 69), phosphate shales of Phosphoria formation (70), and Wells formation; Wood shale in foreground. Caribou County, Idaho. August 7, 1911. Plate 29-A, with graphics, in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00069 ID. Mansfield, G.R. 69 Panorama of ridge extending from sec. 14 through sec. 3, T. 8 S., R. 44 E., Slug Creek quadrangle; showing dip slope of Rex chert member (68 and 69), phosphate shales of Phosphoria formation (70), and Wells formation; Wood shale in foreground. Caribou County, Idaho. August 7, 1911. Plate 29-A, with graphics, in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00070 ID. Mansfield, G.R. 70 Panorama of ridge extending from sec. 14 through sec. 3, T. 8 S., R. 44 E., Slug Creek quadrangle; showing dip slope of Rex chert member (68 and 69), phosphate shales of Phosphoria formation (70), and Wells formation; Wood shale in foreground. Caribou County, Idaho. August 7, 1911. Plate 29-A, with graphics, in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00079 ID. Mansfield, G.R. 79 Dip slope of Rex chert near the head of Crow Creek, T. 11 S., R. 45 E., Montpelier quadrangle, Bear Lake County, Idaho. August 24,1911. Plate 50-A in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00080 ID. Mansfield, G.R. 80 Panorama formed from photos 80 and 81, from near Montpelier Creek, looking northwest; shows southern tip of uneroded part of overthrust block and position of subordinate branch fault; Carboniferous formations; Thaynes group; Nugget sandstone; Twin Creek limestone. Syncline and anticlines of lower fault block in foreground. Bear Lake County, Idaho. August 25, 1911. Plate 36-C, with graphics, in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00081 ID. Mansfield, G.R. 81 Panorama formed from photos 80 and 81, from near Montpelier Creek, looking northwest; shows southern tip of uneroded part of overthrust block and position of subordinate branch fault; Carboniferous formations; Thaynes group; Nugget sandstone; Twin Creek limestone. Syncline and anticlines of lower fault block in foreground. Bear Lake County, Idaho. August 25, 1911. Plate 36-C, with graphics, in U.S. Geological Survey. Professional paper 152. 1927. #1:/Utah-Professional paper 152/mgr00099 ID. Mansfield, G.R. 99 Large spring in lower Swan Creek about three-quarters of a mile west of Bear Lake and 1 mile south of the Montpelier quadrangle, Rich County, Utah. July 3, 1912. Plate 58-B in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00100 ID. Mansfield, G.R. 100 Form a panoramic view of south side of St. Charles canyon and of the Bear River range from a point in sec. 18, T. 15 S., R. 43 E., Montpelier quadrangle; Snowdrift peneplain (?) in extreme back ground. Starting with the right portion of photo 100, the following formations, or members of are exposed; Bloomington formation, Nounan limestone, and Worm Creek quartzite member (to 101) then, St. Charles limestone, continuing in to 102, which also shows, the Garden City limestone that is overlain by the Swan Peak quartz (in 103). Bear Lake County, Idaho. July 8, 1912. Plate 21-C, with graphics, in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Proflessional paper 152/mgr00101 ID. Mansfield, G.R. 101 Form a panoramic view of south side of St. Charles canyon and of the Bear River range from a point in sec. 18, T. 15 S., R. 43 E., Montpelier quadrangle; Snowdrift peneplain (?) in extreme back ground. Starting with the right portion of photo 100, the following formations, or members of are exposed; Bloomington formation, Nounan limestone, and Worm Creek quartzite member (to 101) then, St. Charles limestone, continuing in to 102, which also shows, the Garden City limestone that is overlain by the Swan Peak quartz (in 103). Bear Lake County, Idaho. July 8, 1912. Plate 21-C, with graphics, in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00102 ID. Mansfield, G.R. 102 Form a panoramic view of south side of St. Charles canyon and of the Bear River range from a point in sec. 18, T. 15 S., R. 43 E., Montpelier quadrangle; Snowdrift peneplain (?) in extreme back ground. Starting with the right portion of photo 100, the following formations, or members of are exposed; Bloomington formation, Nounan limestone, and Worm Creek quartzite member (to 101) then, St. Charles limestone, continuing in to 102, which also shows, the Garden City limestone that is overlain by the Swan Peak quartz (in 103). Bear Lake County, Idaho. July 8, 1912. Plate 21-C, with graphics, in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00103 ID. Mansfield, G.R. 103 Form a panoramic view of south side of St. Charles canyon and of the Bear River range from a point in sec. 18, T. 15 S., R. 43 E., Montpelier quadrangle; Snowdrift peneplain (?) in extreme back ground. Starting with the right portion of photo 100, the following formations, or members of are exposed; Bloomington formation, Nounan limestone, and Worm Creek quartzite member (to 101) then, St. Charles limestone, continuing in to 102, which also shows, the Garden City limestone that is overlain by the Swan Peak quartz (in 103). Bear Lake County, Idaho. July 8, 1912. Plate 21-C, with graphics, in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00104 ID. Mansfield, G.R. 104 Form a panoramic view of south side of St. Charles canyon and of the Bear River range from a point in sec. 18, T. 15 S., R. 43 E., Montpelier quadrangle; Snowdrift peneplain (?) in extreme back ground. Starting with the right portion of photo 100, the following formations, or members of are exposed; Bloomington formation, Nounan limestone, and Worm Creek quartzite member (to 101) then, St. Charles limestone, continuing in to 102, which also shows, the Garden City limestone that is overlain by the Swan Peak quartz (in 103). Bear Lake County, Idaho. July 8, 1912. Plate 21-C, with graphics, in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00111 ID. Mansfield, G.R. 111 Georgetown Canyon where crossed by the Bannock overthrust, Slug Creek and Montpelier quadrangles; view northwest across South and Georgetown Canyons; Carboniferous limestone; Twin Creek limestone and Preuss sandstone. Bear Lake County, Idaho. August 7, 1912. Plate 38-B, with graphics, in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00112 ID. Mansfield, G.R. 112 Georgetown Canyon where crossed by the Bannock overthrust, Slug Creek and Montpelier quadrangles; view northwest across South and Georgetown Canyons; Carboniferous limestone; Twin Creek limestone and Preuss sandstone. Bear Lake County, Idaho. August 7, 1912. Plate 38-B, with graphics, in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00113 ID. Mansfield, G.R. 113 Georgetown Canyon where crossed by the Bannock overthrust, Slug Creek and Montpelier quadrangles; view northwest across South and Georgetown Canyons; Carboniferous limestone; Twin Creek limestone and Preuss sandstone. Bear Lake County, Idaho. August 7, 1912. Plate 38-B, with graphics, in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00121 ID. Mansfield, G.R. 121 Ledge of rhyolite on north slope of Middle Cone, NW 1/4 SE 1/4 sec. 7, T. 7 S., R. 42 E. Henry quadrangle; showing inclusions of basalt. Caribou County, Idaho. September 20, 1912. Plate 33-B in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00124 ID. Mansfield, G.R. 124 North Eden delta from a hill near the road about a mile north of the state line, Montpelier and Randolph quadrangles, former shore of Bear Lake, are visible in the distance. Bear Lake County, Idaho. July 28, 1912. Plate 17-B, with graphics, in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00128 ID. Mansfield, G.R. 128 Ledges of Madison limestone of Bannock overthrust block exposed at Joes Gap, near Montpelier, Montpelier quadrangle; Madison limestone, Wells formation, Phosphoria formation, Triassic formations and Salt Lake formation. Bear Lake County, Idaho. August 5, 1912. Plate 21-B, with graphics, in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00135 ID. Mansfield, G.R. 135 Folded structure at the north end of Waterloo Hill, T. 13 S., R. 45 E., Montpelier quadrangle: Wells formation; Phosphoria phosphatic shale; Rex chert member of Phosphoria; Woodside shale. Bear Lake County, Idaho. June 24, 1912. Plate 52-A, with graphics, in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00146 ID. Mansfield, G.R. 146 Cliff of basalt, Henry quadrangle, exposing two flows with columnar jointing, north side of Blackfoot Gorge, sec. 14, T. 7 N., R. 42, E. Caribou County, Idaho. September 17, 1912. Plate 18-B in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00199 ID. Mansfield, G.R. 199 Canyon of Blackfoot River along north side of Fort Hall Indian Reservation: in T. 3 S., R. 38 E., Bingham County, Idaho. August 30, 1913. Plate 61-B in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00289 ID. Mansfield, G.R. 289 East side of Crag Lake, Henry quadrangle; showing wall of basaltic debris and succession of basaltic flows together with former higher water levels and mud filling Crag Lake. These photographs cover about the center and left of the published plate, the other is apparently lost. Caribou County, Idaho. July 3,1916. Part of plate 57-A in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00290 ID. Mansfield, G.R. 290 East side of Crag Lake, Henry quadrangle; showing wall of basaltic debris and succession of basaltic flows together with former higher water levels and mud filling Crag Lake. These photographs cover about the center and left of the published plate, the other is apparently lost. Caribou County, Idaho. July 3,1916. Part of plate 57-A in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00298 ID. Mansfield, G.R. 298 Spring cone in the NE 1/4 sec. 13, T.6 S., R. 40 E., Henry quadrangle. Caribou County, Idaho. July 6, 1916. Plate 60-B in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00315 ID. Mansfield, G.R. 315 Limerock Mountain, Crane's Flat quadrangle: an anticlinal fold in Brazer limestone (part of the Snowdrift anticline) from the NE 1/4 sec. 12, T. 5 S., R. 41 E. Caribou County, Idaho. July 25, 1916. Plate 35-A in U.S. Geological Survey. Professional paper 152. 1927. #1:/California-Professional paper 152/mgr00389 ID. Mansfield, G.R. 389 Form a panorama of dissected gravel fan near Acme, on Amargosa River; showing light colored Tertiary clay exposed by erosion of the gravel. San Bernardino and Inyo Counties, California. January 22, 1918. Plate 41-B in U.S. Geological Survey. Professional paper 152. 1927. #1:/California-Professional paper 152/mgr00390 ID. Mansfield, G.R. 390 Form a panorama of dissected gravel fan near Acme, on Amargosa River; showing light colored Tertiary clay exposed by erosion of the gravel. San Bernardino and Inyo Counties, California. January 22, 1918. Plate 41-B in U.S. Geological Survey. Professional paper 152. 1927. #1:/California-Professional paper 152/mgr00391 ID. Mansfield, G.R. 391 Form a panorama of dissected gravel fan near Acme, on Amargosa River; showing light colored Tertiary clay exposed by erosion of the gravel. San Bernardino and Inyo Counties, California. January 22, 1918. Plate 41-B in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00476 ID. Mansfield, G.R. 476 Bear Lake Phosphate Co.'s mine in Slight Canyon: T. 14 S., R.43 E. Montpelier quadrangle, photos form a panorama. Bear Lake County, Idaho. August 31, 1920. Plate 47-B in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00477 ID. Mansfield, G.R. 477 Bear Lake Phosphate Co.'s mine in Slight Canyon: T. 14 S., R.43 E. Montpelier quadrangle, photos form a panorama. Bear Lake County, Idaho. August 31, 1920. Plate 47-B in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00478 ID. Mansfield, G.R. 478 Western Phosphate Co.'s mine in Paris Canyon: T. 14 S., R. 43 N., Montpelier quadrangle. Photos form a panorama. Bear Lake County, Idaho. August 31, 1920. Plate 47-A in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00479 ID. Mansfield, G.R. 479 Western Phosphate Co.'s mine in Paris Canyon: T. 14 S., R. 43 N., Montpelier quadrangle. Photos form a panorama. Bear Lake County, Idaho. August 31, 1920. Plate 47-A in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00480 ID. Mansfield, G.R. 480 Rock terraces in Georgetown Canyon, Slug Creek quadrangle; panoramic view southwest from the head of Phosphoria Gulch, Gannett erosion surface (?), Elk Valley erosion cycle, Dry Fork cycle, and Blackfoot cycle, from left to right. Bear Lake County, Idaho. September 2,1920. Plate 16-B, with graphics, in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00481 ID. Mansfield, G.R. 481 Rock terraces in Georgetown Canyon, Slug Creek quadrangle; panoramic view southwest from the head of Phosphoria Gulch, Gannett erosion surface (?), Elk Valley erosion cycle, Dry Fork cycle, and Blackfoot cycle, from left to right. Bear Lake County, Idaho. September 2,1920. Plate 16-B, with graphics, in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00482 ID. Mansfield, G.R. 482 Rock terraces in Georgetown Canyon, Slug Creek and Crow Creek quadrangles; view northeast from the head of Phosphoria Gulch, Snowdrift peneplain, Elk Valley surface, young valley Blackfoot cycle. Photos 482, 483 and 484 form a panorama. Bear Lake County, Idaho. September 2,1920. Plate 16-A, with graphics, in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00483 ID. Mansfield, G.R. 483 Rock terraces in Georgetown Canyon, Slug Creek and Crow Creek quadrangles; view northeast from the head of Phosphoria Gulch, Snowdrift peneplain, Elk Valley surface, young valley Blackfoot cycle. Photos 482, 483 and 484 form a panorama. Bear Lake County, Idaho. September 2,1920. Plate 16-A, with graphics, in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00484 ID. Mansfield, G.R. 484 Rock terraces in Georgetown Canyon, Slug Creek and Crow Creek quadrangles; view northeast from the head of Phosphoria Gulch, Snowdrift peneplain, Elk Valley surface, young valley Blackfoot cycle. Photos 482, 483 and 484 form a panorama. Bear Lake County, Idaho. September 2,1920. Plate 16-A, with graphics, in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00501 ID. Mansfield, G.R. 501 Outlet region of Dry Fork valley, Slug Creek quadrangle, former outlet, elbow of capture; present outlet, Blackfoot cycle. Caribou County, Idaho. September 7, 1920. Plate 14-B, with graphics, in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00503 ID. Mansfield, G.R. 503 Form a panoramic view in the Gannett Hills eastward from a point near the road on the divide between Ephraim and Elk valleys, Crow Creek quadrangle, showing (essentially from left to right) Gannett erosion surface, older erosion remnants, Elk Valley erosion and young valley of the Dry Fork cycle. Caribou County, Idaho. September 9, 1920. Plate 13-A, with graphics, in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00504 ID. Mansfield, G.R. 504 Form a panoramic view in the Gannett Hills eastward from a point near the road on the divide between Ephraim and Elk valleys, Crow Creek quadrangle, showing (essentially from left to right) Gannett erosion surface, older erosion remnants, Elk Valley erosion and young valley of the Dry Fork cycle. Caribou County, Idaho. September 9, 1920. Plate 13-A, with graphics, in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00505 ID. Mansfield, G.R. 505 Form a panoramic view in the Gannett Hills eastward from a point near the road on the divide between Ephraim and Elk valleys, Crow Creek quadrangle, showing (essentially from left to right) Gannett erosion surface, older erosion remnants, Elk Valley erosion and young valley of the Dry Fork cycle. Caribou County, Idaho. September 9, 1920. Plate 13-A, with graphics, in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00519 ID. Mansfield, G.R. 519 Hanging valley of Dry Fork valley age on the south side of Montpelier Canyon, in secs. 32 and 33, T. 12 S., R. 45 E., Montpelier quadrangle, Bear Lake County, Idaho. September 10, 1920. Plate 14-A in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00535 ID. Mansfield, G.R. 535 Form a panorama of the scarp of the Bear Lake fault, east side of Bear Lake valley, Montpelier quadrangle; note faceted slopes. The top pf the escarpment marks the western edge of the Bear Lake Plateau. Bear Lake County, Idaho. September 14, 1920. Plate 36- B in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00717 ID. Mansfield, G.R. 717 Polished surface of phospate rock from McDougls Pass, Salt River Range; showing both nodular and oolitic structure. Note tooth in one of the nodules; inlarged 3 and 1/3 times. Lincoln County, Wyoming. 1923. Plate 63 in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00736 ID. Mansfield, G.R. 736 Dam of Blackfoot River reservoir: in sec. 12, T. 5 S., R. 40 E., Cranes Flat quadrangle, Caribou County, Idaho. August 3, 1925. Plate 61-A in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/mgr00737 ID. Mansfield, G.R. 737 Dam of Blackfoot River reservoir: in sec. 12, T. 5 S., R. 40 E., Cranes Flat quadrangle, Caribou County, Idaho. August 3, 1925. Plate 61-A in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/rrw00177 ID. Richards, R.W. 177 Ledges of horizontal beds of the Rex chert member of the Phosphoria formation, sec. 28, T.9 S., R. 44 E., Slug Creek quadrangle, Caribou County, Idaho. Circa 1911. Plate 61-C in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/rrw00179 ID. Richards, R.W. 179 Form a panorama of Dry Fork valley from a little knoll on the southwest margin of the valley, Slug Creek quadrangle; former outlet; young valley of Blackfoot cycle, which now drains it. Caribou County, Idaho. Circa 1911. Plate 13-B in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/rrw00180 ID. Richards, R.W. 180 Form a panorama of Dry Fork valley from a little knoll on the southwest margin of the valley, Slug Creek quadrangle; former outlet; young valley of Blackfoot cycle, which now drains it. Caribou County, Idaho. Circa 1911. Plate 13-B in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/rrw00181 ID. Richards, R.W. 181 Form a panorama of Dry Fork valley from a little knoll on the southwest margin of the valley, Slug Creek quadrangle; former outlet; young valley of Blackfoot cycle, which now drains it. Caribou County, Idaho. Circa 1911. Plate 13-B in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/rrw0262a ID. Richards, R.W. 262a Prospect in phosphatic shale at the south end of the Waterloo claim, in sec. 6, T.13 S., R.45 E., Montpelier quadrangle; showing "cap lime" and "main bed" slightly faulted. Bear Lake County, Idaho. Circa 1911. Plate 52-B in U.S. Geological Survey. Professional paper 152. 1927. #1:/Idaho-Professional paper 152/rrw00278 ID. Richards, R.W. 278 Gateway in Rex chert member of Phosphoria and related formations in Raymond Canyon T. 26 N., R. 119 W., Montpelier quadrangle: Rex chert member, (left and right); Woodside shale (ridge in middle ground and upper left); Thaynes group (top right). This picture is a composite of Richards photos 278, 279 and 280. Bear Lake County, Idaho. Circa 1911. Plate 54, with graphics, in U.S. Geological Survey. Professional paper 152. 1927. #1:/Wyoming-Professional paper 158/bwh00084 ID. Bradley, W.H. 84 Polished specimen of moderately rich oil shale; shows regularly space layers of calcite filled glauberite (?) cavities; natural size, from Green River, Sweetwater County, Wyoming. 1924. Plate 14-B in U.S. Geological Survey. Professional paper 158. 1930. #1:/Utah-Professional paper 158/bwh00303 ID. Bradley, W.H. 303 Photomicrograph of a thin section of specimen from an analcite crystal bed, showing the idiomorphism of crystals and the abundance of dust like inclusions; the jet-black pyrite and the clear gray areas between the crystals are holes in the section. From a bed about 750 feet above the base of the Green River formation in the canyon of the White River, sec. 27, T. 9S. R.25 E., enlarged 36 diameters. Uintah County, Utah. September 14, 1925. Plate 1-A in U.S. Geological Survey. Professional paper 158. 1930. #1:/Colorado-Professional paper 158/bwh00298 ID. Bradley, W.H. 298 Photomicrograph of a thin section cut parallel to the bedding of a rich stratum of oil shale studded with analcite crystals. The finest white specks are grains of dolomite and calcite; the jet-black is pyrite, which in places encircles analcite crystals; and the gray groundmass (almost obscured by the abundance of minute carbonate grains) is structure less organic matter; enlarged 36 diameters. Garfield County, Colorado. July 25, 1924. Plate 2-B in U.S. Geological Survey. Professional paper 158. 1930. #1:/Colorado-Professional paper 158/bwh00316 ID. Bradley, W.H. 316 Photomicrograph of a specimen from an analcite crystal bed with a distinctly tuffaceous matrix; showing sub parallel orientation of the large biotite flakes, some of which are deeply embedded in the analcite crystals. The medium toned gray matrix is chalcedony. From a bed in the north wall of White River canyon, T. 1 N., R. 103 W., enlarged 80 diameters. Rio Blanco County, Colorado. 1927. Plate 2-A in U.S. Geological Survey. Professional paper 158. 1930. #1:/Utah-Professional paper 158/bwh00318 ID. Bradley, W.H. 318 Photomicrograph of a part of the thin section shown in Bradley photo 303; showing inclusions of minute lozenge shaped apophylite crystals in analcite, enlarged 500 diameters. Uintah County, Utah. September 14, 1925. Plate 1-B, with graphics, in U.S. Geological Survey. Professional paper 158. 1930. #1:/Colorado-Professional paper 158/bwh00319 ID. Bradley, W.H. 319 Photomicrograph of a group of euhedral sanidine and orthoclase crystals isolated from oil shale. The grains are immersed in oil, which has a refractive index of 1.58; enlarged 80 diameters, from a bed in the western part of T. 6S, R. 95 W. Garfield County, Colorado. 1927. Plate 3-B in U.S. Geological Survey. Professional paper 158. 1930. #1:/Colorado-Professional paper 158/bwh00320 ID. Bradley, W.H. 320 Photomicrograph of a group of minute apophylite crystals isolated from oil shale, showing nearly perfect prismatic crystals and also irregular forms. From a thin rich layer of oil shale in the "Mahogany ledge" at the U.S. Bureau of Mines experimental min in sec. 23, T. 6 S., R. 96 W. The grains are immersed in an oil which has a refractive index of 1.58; enlarged 500 diameters. Garfield County, Colorado. 1927. Plate 3-A in U.S. Geological Survey. Professional paper 158. 1930. #1:/Colorado-Professional paper 158/bwh00321 ID. Bradley, W.H. 321 Photomicrograph showing varves in a very rich oil shale, the black parts are organic matter and the light gray areas are mineral grains; enlarged 54 diameters. From the Mahogany Ledge near the head of Clear Creek in sec. 9, T. 5 S.,R. 98W. Garfield County, Colorado. 1927. Plate13-A in U.S. Geological Survey. Professional paper 158. 1930. Plate14-B in U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 158/bwh00322 ID. Bradley, W.H. 322 Photomicrograph of a rich oil shale showing groups of varves distorted by small concretionary lenses of carbonate grains; enlarged 54 diameters. Garfield County, Colorado. 1927. Plate13-B in U.S. Geological Survey. Professional paper 158. 1930. #1:/Colorado-Professional paper 158/bwh00323 ID. Bradley, W.H. 323 Photomicrograph showing detail of the varves in the rich oil shale specimen in Bradley photo 321; the organic laminae indicated by marks are themselves finely laminated. The mineral laminae contain considerable organic matter, but they are readily distinguished by their coarser grain and greater thickness. Enlarged 320 diameters. Garfield County, Colorado. 1927. Plate14-A in U.S. Geological Survey. Professional paper 158. 1930. #1:/Colorado-Professional paper 158/bwh00324 ID. Bradley, W.H. 324 Photomicrograph of a fine grained limy sandstone showing thick varves; the light bands are sandy and unusually thick, the dark bands consist largely of organic matter. Enlarged 37 diameters. Specimen from a bed in the upper part of the Green River formation at the junction of Parachute Creek and East Middle Fork of Parachute Creek in sec. 18, T. 5 S., R. 95 W., Garfield County, Colorado. 1927 Plate 12-A in U.S. Geological Survey. Professional paper 158. 1930. #1:/Colorado-Professional paper 158/bwh00326 ID. Bradley, W.H. 326 Photomicrograph of a part of the organic marlstone shown in Bradley photo 325, illustrating the regular spacing of the dark laminae; the thin section was cut abnormally thick so as to bring out the fore feebly colored organic layers. Enlarged 18 diameters. Garfield County, Colorado. 1927. Plate 12-B in U.S. Geological Survey. Professional paper 158. 1930. #1:/North Dakota- Professional paper 158/dce00125 ID. Dobbin, C.E. 125 Grayish white sandstone at the top of the Fox Hills sandstone in the south bank of the Cannonball River, 3.5 miles west of Solen, Sioux County, North Dakota. Circa 1923. Plate 4-A in U.S. Geological Survey. Professional paper 158. 1930. #1:/South Dakota- Professional paper 158/dce00130 ID. Dobbin, C.E. 130 Cross-bedding in the Fox Hills sandstone (?) in the SE 1/4 sec. 15, T. 15 N., R. 8 E. near Govert post office (?), Harding County, South Dakota. Circa 1923. Plate 4-B in U.S. Geological Survey. Professional paper 158. 1930. #1:/North Dakota- Professional paper 158/dce00132 ID. Dobbin, C.E. 132 Flutings in the weathered surface of the Colgate sandstone member of the Fox Hills sandstone in the railroad cut 3.5 miles west of Marmarth, Slope County, North Dakota. Circa 1923. Plate 4-C in U.S. Geological Survey. Professional paper 158. 1930. Plate 2- B in U.S. Geological Survey. Bulletin 775. 1928. #1:/North Dakota- Professional paper 158/dce00135 ID. Dobbin, C.E. 135 Local channeling in the Fox Hills sandstone on Little Beaver Creek: in the SE 1/4 sec. 7, T. 102 N., R. 106 W., Bowman County, North Dakota. Circa 1923. Plate 5-A in U.S. Geological Survey. Professional paper 158. 1930. #1:/Montana-Professional paper 158/dce00147 ID. Dobbin, C.E. 147 Colgate sandstone: person for scale, 4 miles southwest of Glendive. Dawson County, Montana. Circa 1923. Plate 5-C in U.S. Geological Survey. Professional paper 158. 1930. #1:/Idaho-Professional paper 158/rcp00895 ID. Ross, C.P. 895 The "Chinese Wall" at the head of Livingston Creek, Custer County, Idaho. August 18, 1928. Plate 17-B in U.S. Geological Survey. Professional paper 158. 1930. #1:/Idaho-Professional paper 158/rcp00897 ID. Ross, C.P. 897 Railroad Ridge, looking east from a point near the highest part of the ridge. Custer County, Idaho. August 18, 1928. Plate 17-A in U.S. Geological Survey. Professional paper 158. 1930. #1:/Idaho-Professional paper 158/rcp00898 ID. Ross, C.P. 898 Close view of the detritus composing Railroad Ridge, exposure is near the top of the ridge east of the Hermit mine. Custer County, Idaho. August 18, 1928. Plate 18-B in U.S. Geological Survey. Professional paper 158. 1930. #1:/Idaho-Professional paper 158/rcp00899 ID. Ross, C.P. 899 The head of Jim Creek, looking west from a point near the northeast end of the detritus non Railroad Ridge. Custer County, Idaho. August 18, 1928. Plate 19-B in U.S. Geological Survey. Professional paper 158. 1930. #1:/Idaho-Professional paper 158/rcp00900 ID. Ross, C.P. 900 The dissected plateau carved on Tertiary volcanic rocks and the basin at the head of Silver Rule Creek, view northeast from a point just below Hermit mine. Custer County, Idaho. August 18, 1928. Plate 18-A in U.S. Geological Survey. Professional paper 158. 1930. #1:/Idaho-Professional paper 158/rcp00902 ID. Ross, C.P. 902 Cirque carved in detritus and Paleozoic strata at the head of Silver Rule Creek. Custer County, Idaho. August 18, 1928. Plate 19-A, in U.S. Geological Survey. Professional paper 158. 1930. #1:/Utah-Professional paper 164/mrc00024 ID. Moore, R.C. 24 Erosion remnants: balanced rock, Entrada sandstone, Harris Wash southeast of southeast of Escalante. Garfield County, Utah. 1921. Plate 28-C in U.S. Geological Survey. Professional paper 164. 1931. #1:/Utah-Professional paper 164/mrc00027 ID. Moore, R.C. 27 Moenkopi strata unconformably overlain by Shinarump conglomerate in northern part of Circle Cliffs. Garfield County, Utah. 1921. Plate 7-B in U.S. Geological Survey. Professional paper 164. 1931. #1:/Utah-Professional paper 164/mrc00029 ID. Moore, R.C. 29 Erosion remnants: rock monuments weathered from Entrada sandstone, Collett Creek, southeast of Escalante. Garfield County, Utah. 1921. Plate 28-B in U.S. Geological Survey. Professional paper 164. 1931. #1:/Utah-Professional paper 164/mrc00030 ID. Moore, R.C. 30 Erosion remnants: demoiselles on Chinle slope, north fork of Silver Falls canyon, Circle Cliffs: stadia rod for scale. Garfield County, Utah. 1921. Plate 28-D in U.S. Geological Survey. Professional paper 164. 1931. #1:/Utah-Professional paper 164/mrc00036 ID. Moore, R.C. 36 Butte of Chinle shale capped by jointed Wingate sandstone in southwestern part of Circle Cliffs; note effect of joints on weathering of the sandstone; the slope is formed by Chinle strata, and the flat in foreground by the Shinarump conglomerate. Garfield County, Utah. 1921. Plate 8-B in U.S. Geological Survey. Professional paper 164. 1931. #1:/Utah-Professional paper 164/mrc00038 ID. Moore, R.C. 38 Petroliferous Moenkopi strata in eastern part of Circe Cliffs: Garfield County, Utah. 1921. Plate 31-A in U.S. Geological Survey. Professional paper 164. 1931. #1:/Utah-Professional paper 164/mrc00041 ID. Moore, R.C. 41 Canyon of Death Hollow Creek, here is than 20 feet across. The canyon is cut in Wingate sandstone. Garfield County, Utah. 1921. Plate 23-A in U.S. Geological Survey. Professional paper 164. 1931. #1:/Utah-Professional paper 164/mrc00051 ID. Moore, R.C. 51 Straight Cliffs sandstone on Escalante River west Escalante. King County, 1921. Plate 14-A in U.S. Geological Survey. Professional paper 164. 1931. #1:/Utah-Professional paper 164/mrc00082 ID. Moore, R.C. 82 Strongly undercut meander on Muley Twist Creek; the massive sandstone is Wingate, inclined toward the observer. The slabby sandstone is Todilto (?) formation. Garfield County, Utah. 1921. Plate 22-C, in U.S. Geological Survey. Professional paper 164. 1931. #1:/Utah-Professional paper 164/mrc00086 ID. Moore, R.C. 86 Along face of Straight Cliffs, take about 14 miles south of Escalante. The sandstone Pin the upper part of the cliffs is the Cretaceous Straight Cliffs formation. Tropic shale forms a slope. The Dakota (?) sandstone makes the prominent lower bench. Moore 86 and 87 form this panorama. Garfield County, Utah. 1921. Plate 21-A, in U.S. Geological Survey. Professional paper 164. 1931. #1:/Utah-Professional paper 164/mrc00087 ID. Moore, R.C. 87 Along face of Straight Cliffs, take about 14 miles south of Escalante. The sandstone in the upper part of the cliffs is the Cretaceous Straight Cliffs formation. Tropic shale forms a slope. The Dakota (?) sandstone makes the prominent lower bench. Moore 86 and 87 form this panorama. Garfield County, Utah. 1921. Plate 21-A, in U.S. Geological Survey. Professional paper 164. 1931. #1:/Utah-Professional paper 164/mrc00098 ID. Moore, R.C. 98 Honeycomb weathering in block of Wingate sandstone Silver Falls canyon. Garfield County, Utah. 1921. Plate 9-B in U.S. Geological Survey. Professional paper 164. 1931. #1:/Utah-Professional paper 164/mrc00201 ID. Moore, R.C. 201 Glen Canyon west of Kane Creek, Gunsight Butte, shown in the view, is composed of the Morrison, Summerville (?) and Entrada formation on a wide bench of the Carmel formation, which extends to the foreground. Kane County, Utah. 1921. Plate 10-A in U.S. Geological Survey. Professional paper 164. 1931. #1:/Utah-Professional paper 164/mrc00099 ID. Moore, R.C. 99 Form the panoramic view from crest of Waterpocket fold, Mt. Ellen, and Henry Mountains in background in photo 101. Garfield County, Utah. 1921. Plate 18, with accompanying sketch, in U.S. Geological Survey. Professional paper 164. 1931. #1:/Utah-Professional paper 164/mrc00100 ID. Moore, R.C. 100 Form the panoramic view from crest of Waterpocket fold, Mt. Ellen, and Henry Mountains in background in photo 101. Garfield County, Utah. 1921. Plate 18, with accompanying sketch, in U.S. Geological Survey. Professional paper 164. 1931. #1:/Utah-Professional paper 164/mrc00101 ID. Moore, R.C. 101 Form the panoramic view from crest of Waterpocket fold, Mt. Ellen, and Henry Mountains in background in photo 101. Garfield County, Utah. 1921. Plate 18, with accompanying sketch, in U.S. Geological Survey. Professional paper 164. 1931. #1:/Utah-Professional paper 164/mrc00105 ID. Moore, R.C. 105 Erosion remnants: cave in Navajo sandstone, Harris Wash, southeast of Escalante; horseback rider provides scale. Garfield County, Utah. 1921. Plate 27-C in U.S. Geological Survey. Professional paper 164. 1931. #1:/Utah-Professional paper 164/mrc00113 ID. Moore, R.C. 113 Colorado River at Halls crossing; shows undercut cliffs on outer and downstream sides of meander bends and slip-off slopes on spurs projecting into bends. The country rock is Navajo sandstone, covered locally by Carmel strata. Kane County, Utah. 1921. Plate 25-A in U.S. Geological Survey. Professional paper 164. 1931. #1:/Utah-Professional paper 164/mrc00114 ID. Moore, R.C. 114 Colorado River at Halls crossing; shows undercut cliffs on outer and downstream sides of meander bends and slip-off slopes on spurs projecting into bends. The country rock is Navajo sandstone, covered locally by Carmel strata. Kane County, Utah. 1921. Plate 25- A in U.S. Geological Survey. Professional paper 164. 1931. #1:/Utah-Professional paper 164/mrc00115 ID. Moore, R.C. 115 Colorado River at Halls crossing; shows undercut cliffs on outer and downstream sides of meander bends and slip-off slopes on spurs projecting into bends. The country rock is Navajo sandstone, covered locally by Carmel strata. Kane County, Utah. 1921. Plate 25- A in U.S. Geological Survey. Professional paper 164. 1931. #1:/Utah-Professional paper 164/mrc00138 ID. Moore, R.C. 138 Kaibab limestone near junction of Silver Falls and Muley Twist roads, Circle Cliffs district. Garfield County, Utah. 1921. Plate 6-B in U.S. Geological Survey. Professional paper 164. 1931. #1:/Utah-Professional paper 164/mrc00152 ID. Moore, R.C. 152 Butte 1 mile southwest of Paria; Chinle formation capped by remnant of Wingate sandstone, the foreground shows dip slope formed by sandstone at the top of the Moenkopi: the Shinarump conglomerate is represented by a thin white sand at the base of the slope, but it disappears locally in this area, the Chinle resting directly on Moenkopi. The entire thickness f the Chinle, about 500 feet is shown in this view. Kane County, Utah. 1921. Plate 7-C in U.S. Geological Survey. Professional paper 164. 1931. #1:/Utah-Professional paper 164/mrc00195 ID. Moore, R.C. 195 Glen Canyon west of Kane Creek; monuments and buttes of hard sandstone (Entrada, Summerville, and Morrison formations) on a broad bench formed by erosion of weak strata (Carmel formation) overlying hard sandstone (Navajo). Kane County, Utah. 1921. Plate 22-A, in U.S. Geological Survey. Professional paper 164. 1931. #1:/Utah-Professional paper 164/mrc00301 ID. Moore, R.C. 301 East Kaibab monocline, looking north from a point above Paria River; Navajo sandstone at left, Dakota (?) sandstone, Tropic shale and Straight Cliffs sandstone, in order named at right. Kane County, Utah. 1921. Plate 19-B in U.S. Geological Survey. Professional paper 164. 1931. #1:/Utah-Professional paper 164/mrc00303 ID. Moore, R.C. 303 From a point near the "Gut", looking northward along the east Kaibab monocline, Butler valley, at the left, is carved in weak San Rafael beds; Morrison (?) and Dakota (?) sandstone rim it. The valley in the central part of the view is carved in Tropic shale. Straight Cliffs sandstone and Wahweap sandstone make the prominent ridges at the right. Beyond these ridges may be seen peneplained Kaiparowits beds, partly dissected. Moore 303 and 304 form this panorama. Garfield County, Utah. 1921. Plate 20-A, in U.S. Geological Survey. Professional paper 164. 1931. #1:/Utah-Professional paper 164/mrc00304 ID. Moore, R.C. 304 From a point near the "Gut", looking northward along the east Kaibab monocline, Butler valley, at the left, is carved in weak San Rafael beds; Morrison (?) and Dakota (?) sandstone rim it. The valley in the central part of the view is carved in Tropic shale. Straight Cliffs sandstone and Wahweap sandstone make the prominent ridges at the right. Beyond these ridges may be seen peneplained Kaiparowits beds, partly dissected. Moore 303 and 304 form this panorama. Garfield County, Utah. 1921. Plate 20-A, in U.S. Geological Survey. Professional paper 164. 1931. #1:/Utah-Professional paper 164/mrc00305 ID. Moore, R.C. 305 From a point near the "Gut", looking southward along the East Kaibab monocline, the canyon of Wahweap Creek is seen at the left and the upturned Cretaceous sandstones at the right. This portion of the Kaiparowits Plateau, upheld by the Wahweap sandstone, slopes northward reflecting the dip of the rocks; the streams flow southward in the ever- deepening canyons. Moore 305 and 306 form this panorama. Garfield County, Utah. 1921. Plate 20-B, in U.S. Geological Survey. Professional paper 164. 1931. #1:/Utah-Professional paper 164/mrc00306 ID. Moore, R.C. 306 From a point near the "Gut", looking southward along the East Kaibab monocline, the canyon of Wahweap Creek is seen at the left and the upturned Cretaceous sandstones at the right. This portion of the Kaiparowits Plateau, upheld by the Wahweap sandstone, slopes northward reflecting the dip of the rocks; the streams flow southward in the ever- deepening canyons. Moore 305 and 306 form this panorama. Garfield County, Utah. 1921. Plate 20-B, in U.S. Geological Survey. Professional paper 164. 1931. #1:/Utah-Professional paper 164/mrc00313 ID. Moore, R.C. 313 Monoclinal valley in Tropic shale along East Kaibab monocline east of Butler Valley; the hogback ridges at right are formed by overlying sandstones tilted by the East Kaibab fold, looking north from a point near the "Gut" on the Kaiparowits Plateau trail southeast of Cannonville. Moore 313 and 314 form this panorama. Garfield County, Utah. 1921. Plate 21-B, in U.S. Geological Survey. Professional paper 164. 1931. #1:/Utah-Professional paper 164/mrc00314 ID. Moore, R.C. 314 Monoclinal valley in Tropic shale along East Kaibab monocline east of Butler Valley; the hogback ridges at right are formed by overlying sandstones tilted by the East Kaibab fold, looking north from a point near the "Gut" on the Kaiparowits Plateau trail southeast of Cannonville. Moore 313 and 314 form this panorama. Garfield County, Utah. 1921. Plate 21-B, in U.S. Geological Survey. Professional paper 164. 1931. #1:/Nevada-Professional paper 171/knop0186 ID. Knopf, A. 186 Pioche, from Combined Metals mine. Lincoln County, Nevada. Circa 1925. Plate 4, U.S. Geological Survey, Professional paper 171. 1932. #1:/Colorado-Professional paper 176/lts00232 ID. Lovering, T.S. 232 Upper member of Dakota quartzite in railroad cut at Rocky Point, Colorado and Southern Railroad, Denver-Leadville. Colorado. 1928. Plate 4-A, U.S. Geological Survey, Professional paper 176. 1934. #1:/Wyoming-Professional paper 163/thom0165 ID. Thom, W.T., Jr. 165 Panorama of Teapot Dome from point on Parkman Rim on south end of dome; Natrona County, Wyoming. 1927. Plate 1-A, U.S. Geological Survey, Professional paper 163. 1931. #1:/Colorado-Professional paper 178/lts0058a ID. Lovering, T.S. 58a Oblique aerial view looking southeastward up Leavenworth Creek; showing South Park on the extreme left background to Grays Peak on the extreme right. Clear Creek County, Colorado. circa 1933. Plate 1-A, with sketch, in U.S. Geological Survey. Professional paper 178. 1935. #1:/Colorado-Professional paper 178/lts0061a ID. Lovering, T.S. 61a Oblique aerial view looking southward toward Loveland Pass; showing Revenue Mountain on the extreme left to Keystone Mountain on the extreme right. Clear Creek and Summit Counties, Colorado. circa 1933. Plate 2-A, with sketch, in U.S. Geological Survey. Professional paper 178. 1935. #1:/Colorado-Professional paper 178/lts00342 ID. Lovering, T.S. 342 Idaho Springs formation on east side of Grays Peak; shows sill like seams of aplite and pegmatite parallel to the nearly horizontal schistosity and cross-breaking branch seams. Clear Creek County, Colorado 1930. Plate 6-A, U.S. Geological Survey, Professional paper 178. 1935. Figure 7-B, U.S. Geological Survey, Professional paper 223, 1950. #1:/Colorado-Professional paper 178/lts00114 ID. Lovering, T.S. 114 Typical exposure of Swandye hornblende gneiss near head of St. Johns Gulch, the gneissic structure of the dark gray hornblende gneiss is accentuated by the parallel and crosscutting light gray seams of pegmatite and aplite. The dip of the formation is nearly horizontal at this outcrop, which is near the crest of an anticline. Summit County, Colorado. circa 1927. Plate 7-A, U.S. Geological Survey, Professional paper 178. 1935. #1:/Colorado-Professional paper 178/lts00675 ID. Lovering, T.S. 675 Anticlinal dome of Dakota quartzite cut through by the Snake River: Pierre shale; Niobrara limestone; Morrison formation; Idaho Springs formation. Summit County, Colorado. circa 1927. Plate 7-B, with graphics, U.S. Geological Survey, Professional paper 178. 1935. #1:/Colorado-Professional paper 178/lts00019 ID. Lovering, T.S. 19 Looking east at Ruby Gulch from Lenawee Mountain. The steepness of the right hand side of the gulch was caused by glacial scour where the course of the former glacier swung from southwest to west. Summit County, Colorado. 1926. Plate 7-C, U.S. Geological Survey, Professional paper 178. 1935. #1:/Colorado-Professional paper 178/lts00318 ID. Lovering, T.S. 318 Panorama looking east up: the Snake River from the conical shale hill 1 mile west of the Montezuma quadrangle. Calcareous layers in the Pierre shale form the bluffs on the north side of the river; the low hill in the right middle distance is part of the terminal moraine west of Keystone. The outwash gravel makes the plain in the foreground and the middle distance from the Wisconsin glacier. Summit County, Colorado. circa 1928, Plate 8-A, U.S. Geological Survey, Professional paper 178. 1935. #1:/Colorado-Professional paper 178/lts00321 ID. Lovering, T.S. 321 Panorama looking east up: the Snake River from the conical shale hill 1 mile west of the Montezuma quadrangle. Calcareous layers in the Pierre shale form the bluffs on the north side of the river; the low hill in the right middle distance is part of the terminal moraine west of Keystone. The outwash gravel makes the plain in the foreground and the middle distance from the Wisconsin glacier. Summit County, Colorado. circa 1928, Plate 8-A, U.S. Geological Survey, Professional paper 178. 1935 #1:/Colorado-Professional paper 178/lts00160 ID. Lovering, T.S. 160 Panoramas looking south from the south end of Teller Mountain near the Cashier Mine; glacial trenching of the Flattop peneplain is well shown. Summit County, Colorado. Circa 1927. Plate 8-B, U.S. Geological Survey, Professional paper 178. 1935. #1:/Colorado-Professional paper 178/lts00161 ID. Lovering, T.S. 161 Panoramas looking south from the south end of Teller Mountain near the Cashier Mine; glacial trenching of the Flattop peneplain is well shown. Summit County, Colorado. Circa 1927. Plate 8-B, U.S. Geological Survey, Professional paper 178. 1935. #1:/Colorado-Professional paper 178/lts00130 ID. Lovering, T.S. 130 Glacial lake at head of Smelter Gulch, viewed from Mount Lewis (Square Top Mountain), Clear Creek County, Colorado. circa 1927. Plate 10-A, U.S. Geological Survey, Professional paper 178. 1935. #1:/Colorado-Professional paper 178/lts00347 ID. Lovering, T.S. 347 Rock glacier at head of Stevens Gulch: Clear Creek County, Colorado. 1930. Plate 10-B, U.S. Geological Survey, Professional paper 178. 1935. #1:/Montana-Professional paper 165/cwr00115 ID. Calvert, W.R. 115 Looking northward up Swimming Woman canyon to Half Moon Pass. Fergus County, Montana. 1911. Plate, 35-A, in U.S. Geological Survey, Professional paper 165, 1931. #1:/Montana-Professional paper 165/reev0065 ID. Reeves, F. 65 North flank of the Big Snowy Mountains: showing the dip slope of the Madison limestone and the bluffs formed by the Quadrant formation. Fergus County, Montana. June 1927. Plate 35-B, in U.S. Geological Survey, Professional paper 165, 1931. #1:/Montana-Professional paper 165/reev0061 ID. Reeves, F. 61 The Big Snowy Mountains from the gravel terraces south of the mountains. Wheatland County, Montana. May 1927. Plate 35-C, in U.S. Geological Survey, Professional paper 165, 1931. #1:/Montana-Professional paper 165/reev0062 ID. Reeves, F. 62 The Big Snowy Mountains from the gravel terraces south of the mountains. Wheatland County, Montana. May 1927. Plate 35-C, in U.S. Geological Survey, Professional paper 165, 1931. #1:/Montana-Professional paper 165/cwr0117b ID. Calvert, W.R. 117b Form a panorama of the east wall of Swimming Woman Canyon. Golden Valley County, Montana. 1911. Plate 35-D, in U.S. Geological Survey, Professional paper 165, 1931. #1:/Montana-Professional paper 165/cwr0117c ID. Calvert, W.R. 117c Form a panorama of the east wall of Swimming Woman Canyon. Golden Valley County, Montana. 1911. Plate 35-D, in U.S. Geological Survey, Professional paper 165, 1931. #1:/Montana-Professional paper 165/cwr0117d ID. Calvert, W.R. 117d Form a panorama of the east wall of Swimming Woman Canyon. Golden Valley County, Montana. 1911. Plate 35-D, in U.S. Geological Survey, Professional paper 165, 1931. #1:/Montana-Professional paper 165/cwr0117e ID. Calvert, W.R. 117e Form a panorama of the east wall of Swimming Woman Canyon. Golden Valley County, Montana. 1911. Plate 35-D, in U.S. Geological Survey, Professional paper 165, 1931. #1:/Montana-Professional paper 165/reev0063 ID. Reeves, F. 63 Specimens showing edgewise or intraformational conglomerates in the Meagher limestone. Golden Valley County, Montana. May 1927. Plate 36-A, in U.S. Geological Survey, Professional paper 165, 1931. #1:/Montana-Professional paper 165/reev0064 ID. Reeves, F. 64 Specimens showing edgewise or intraformational conglomerates in the Meagher limestone. Golden Valley County, Montana. May 1927. Plate 36-A, in U.S. Geological Survey, Professional paper 165, 1931. #1:/Montana-Professional paper 147/pjt00945 ID. Pardee, J.T. 945 Damaged schoolhouse at Three Forks. Gallatin County, Montana. July 27, 1925. Plate 5- A in U.S. Geological Survey. Professional paper 147. 1927. #1:/Montana-Professional paper 147/pjt00944 ID. Pardee, J.T. 944 Wreck of church at Three Forks; note separation of the fallen bricks from one another due to failure of mortar. Gallatin County, Montana. July 27, 1925. Plate 5-B in U.S. Geological Survey. Professional paper 147. 1927. #1:/Montana-Professional paper 147/pjt00961 ID. Pardee, J.T. 961 Rockslide near Deer Park, prior to the earthquake, the material shown formed a cliff; temporary track in left foreground. Gallatin County, Montana. July 27, 1925. Plate 7-A in U.S. Geological Survey. Professional paper 147. 1927. #1:/Montana-Professional paper 147/pjt00954 ID. Pardee, J.T. 954 Bottom land along Missouri River, boulder dislodged from a cliff by the earthquake and partly buried by the force of its fall. Broadwater County, Montana. July 1925. Plate 11- B in U.S. Geological Survey. Professional paper 147. 1927. #1:/Montana-Professional paper 147/pjt00976 ID. Pardee, J.T. 976 Shattered ground and overturned clods, Roy Gulch; the upturned clods show white because of a deposit of lime caliche just beneath the soil. Gallatin County, Montana. September 3, 1925. Plate 12-A in U.S. Geological Survey. Professional paper 147. 1927. #1:/Montana-Professional paper 147/pjt01614 ID. Pardee, J.T. 1614 Crack in road embankment north of Three Forks, Gallatin County, Montana. July 1925. Plate 12-B in U.S. Geological Survey. Professional paper 147. 1927. #1:/Montana-Professional paper 147/pjt00952 ID. Pardee, J.T. 952 Ground crack near Canyon Ferry, Clark County, Montana. July 19, 1925. Plate 13-A in U.S. Geological Survey. Professional paper 147. 1927. #1:/Montana-Professional paper 147/pjt00965 ID. Pardee, J.T. 965 Twisted Chimneys at Logan: Gallatin County, Montana. July 28, 1925. Plate 13-B in U.S. Geological Survey. Professional paper 147. 1927. #1:/Colorado-Professional paper 148/ijd00012 ID. Irving, J.D. 12 Talus at head of Evans amphitheater: Lake County, Colorado. 1913. Plate 10-B in U.S. Geological Survey. Professional paper 148. 1927. #1:/Colorado-Professional paper 148/ijd00021 ID. Irving, J.D. 21 Sheridan Mountain from head of Empire Gulch, showing uniformity of contact between granite and overlying quartzite. Lake County, Colorado. 1913. Plate 30-A in U.S. Geological Survey. Professional paper 148. 1927. #1:/Colorado-Professional paper 148/ijd00022 ID. Irving, J.D. 22 Looking east up Empire Gulch, showing typical U-shaped valley due to glacial erosion. Lake County, Colorado. 1913. Plate 5-A in U.S. Geological Survey. Professional paper 148. 1927. #1:/Colorado-Professional paper 148/ijd00037 ID. Irving, J.D. 37 View up Evans Gulch, showing ditch in ground moraine, Lake County, Colorado. 1913. Plate 9-B in U.S. Geological Survey. Professional paper 148. 1927. #1:/New Mexico-Professional paper 151/rjb00093 ID. Reeside, J.B., Jr. 93 Cephalopods of the Eagle sandstone and related formations, Santa Fe County, New Mexico. No date. Plate 9 in U.S. Geological Survey. Professional paper 151. 1927. #1:/New Mexico-Professional paper 151/rjb00094 ID. Reeside, J.B., Jr. 94 Cephalopods of the Eagle sandstone and related formations, Santa Fe County, New Mexico. No date. Plate 42 in U.S. Geological Survey. Professional paper 151. 1927. #1:/California-Professional paper 157/knop0175 ID. Knopf, A. 175 Mother Lode Belt, as seen from the Central Eureka mine, the town of Sutter Creek lies amid the trees. Amador County, California. 9 a.m. July 27, 1924. Plate 1-A in U.S. Geological Survey. Professional paper 157. 1929. #1:/California-Professional paper 157/knop0180 ID. Knopf, A. 180 Mother Lode belt, as seen from summit of Carson Hill. Huge white quartz vein of Mother Lode system traverses flank and summit of dark hill in the middle ground. Calaveras County, California. 1924. Plate 1-B in U.S. Geological Survey. Professional paper 157. 1929. #1:/California-Professional paper 160/cfc00537 ID. Calkins, F.C. 537 Yosemite National Park, California. Down lower Merced Canyon from El Capitan, the landscape has three distinct sets of elements, indicative of three stages in the development of the Merced Canyon. The level topped ridges at the skyline end in gentle slope opposing slopes that outline dimly a very broad, shallow valley of great antiquity. The steeper slopes below and the broad flats to which they descend outline clearly the sides and floor of a deeper valley cut at a less remote epoch. Abruptly incised in the floor of the valley is a narrow, steep-walled gorge of relatively recent origin. The Merced flows at the bottom of this gorge and is still actively engaged in further deepening it. 1913. Plate 26-A, U.S. Geological Survey Professional paper 160. #1:/California-Professional paper 160/cfc00648 ID. Calkins, F.C. 648 Yosemite National Park, California. Upturned beds of slate and schist in lower Merced Canyon, these upturned strata are the remnants of the huge wrinkles in the earths crust of which the earlier mountain on the site of the present Sierra Nevada were composed. 1913. Plate 26-B, U.S. Geological Survey Professional paper 160. #1:/Wyoming-Professional paper 154/rww00033 ID. Rubey, W.W. 33 Outcrop of Mowry shale on Thornton dome in sec. 7, T. 48 N., R. 65 W., shows a small reverse fault; typical thin bedding of shale and alternation with thin beds of bentonite; and characteristic bare chip covered ground. This outcrop differs from most others in not being heavily overgrown with pines. Weston County, Wyoming. 1923. Plate 14-A in U.S. Geological Survey. Professional paper 154. 1929. #1:/Wyoming-Professional paper 154/bwh00039 ID. Bradley, W.H. 39 Compound algal head consisting of many minor heads, each of which represents a single colony of algae. Specimen is from Tipton tongue of Green River formation in NE 1/4 NE 1/4 sec. 16, T.24 N., R. 102 W. Sweetwater County, Wyoming. 1923. Plate 44-B in U.S. Geological Survey. Professional paper 154. 1929. #1:/Wyoming-Professional paper 154/bwh00043 ID. Bradley, W.H. 43 Tuberculate of papillate exterior of the type Chlorellopsis colonata reef, each tubercle represents a single colony of algae. From the base of the Laney shale member of the Green River formation, NE 1/4 sec. 27, T 25 N., R. 103 W. Sweetwater County, Wyoming. 1923. Plate 36-B in U.S. Geological Survey. Professional paper 154. 1929. #1:/Wyoming-Professional paper 154/bwh00044 ID. Bradley, W.H. 44 Upper surface of a compound reef, which consists of alternating zones of algal and inorganic limestone; near base of Tipton tongue of Green River formation in NW 1/4 sec. 21, T.24 N., R. 101 W.: 75 % of natural size. Sweetwater County, Wyoming. 1923. Plate 43-A in U.S. Geological Survey. Professional paper 154. 1929. #1:/Colorado-Professional paper 154/bwh00135 ID. Bradley, W.H. 135 Group of superimposed algae reefs in the upper part of the basal member of the Green River formation near the divide between west Douglas and East Salt Creeks. The man's feet are at the base of the lowest reef, which truncates the shaly sandstone beds below; his shoulders are level with a thin reef that has unusual pencillated structure. The thin dark colored bed at the top of the unit consists of algal pebbles some of which are shown Bradley photo 182. The group is bout 5.5 meters (18 feet) thick. Garfield County, Colorado. August 18, 1925. Plate 29-A in U.S. Geological Survey. Professional paper 154. 1929. #1:/Colorado-Professional paper 154/bwh00163 ID. Bradley, W.H. 163 Cup shaped, ringed pits in the upper surface of a Chlorellopsis reef, showing their general uniformity of size and arrangement. At the left they are arranged in fairly definite row. The vermiculate surface between the pits shows best in a small area a little to the right of the center. Moffat County, Colorado. August 1, 1925. Plate 38-B in U.S. Geological Survey. Professional paper 154. 1929. #1:/Colorado-Professional paper 154/bwh00164 ID. Bradley, W.H. 164 Large pitted reef consisting of separate closely spaced, turbinate heads which rest upon a bed of smaller algal nodules. The nodule bed rest upon medium grained massive sandstone that is locally cross-bedded. The second and third heads to the left of man show fluting. The minimum time required for the formation of this reef is estimated at 355 years. Moffat County, Colorado. August 2, 1925. Plate 40-A in U.S. Geological Survey. Professional paper 154. 1929. #1:/Colorado-Professional paper 154/bwh00165 ID. Bradley, W.H. 165 Hemispherical heads of pitted algae reef; showing that the pit tubes are very nearly vertical, even where they emerge from the side of a head. The pits in the very steep sides of the head near the hammer make concave niches with nearly horizontal bottoms. The upper surface of the reef at this place is weathered nearly smooth. Moffat County, Colorado. August 2, 1925. Plate 39-A in U.S. Geological Survey. Professional paper 154. 1929. #1:/Colorado-Professional paper 154/bwh00166 ID. Bradley, W.H. 166 Overturned and broken head of the pitted reef shown in Bradley photo 165, this shows near the hammer head a hole that contained the nucleus. It also shows the eccentric growth layers, which may be annual, and near the top of head (lower edge of photograph near the center) several open pit tubes. These are indistinct, partly because they are weathered and partly also because they are somewhat overgrown with algal deposits as the reef formed. Moffat County, Colorado. August 2, 1925. Plate 39-A in U.S. Geological Survey. Professional paper 154. 1929. #1:/Colorado-Professional paper 154/bwh00182 ID. Bradley, W.H. 182 Algal pebbles formed chiefly of Chlorellopsis coloniata Reis in a matrix of ostracode limestone, natural size. Garfield County, Colorado. August 18, 1925. Plate 46-B in U.S. Geological Survey. Professional paper 154. 1929. #1:/Colorado-Professional paper 154/bwh00205 ID. Bradley, W.H. 205 Upper surface of Chlorellopsis reef; with conoidal pits showing their relative size and the difference in texture between the interior of the pits and general surface of the roof, natural size. Moffat County, Colorado. August 1, 1925. Plate 37-B in U.S. Geological Survey. Professional paper 154. 1929. #1:/Colorado-Professional paper 154/bwh00206 ID. Bradley, W.H. 206 Transverse section of Chlorellopsis reef; showing the conoidal pits in section and the thinning of algal layers toward the pits, natural size. Moffat County, Colorado. August 1, 1925. Plate 37-A in U.S. Geological Survey. Professional paper 154. 1929. #1:/Utah- Professional paper 154/bwh00207 ID. Bradley, W.H. 207 Confervites Mantiensis and associated coprolites; photomicrograph of cellular parts of Confervites Mantiensis Bradley: polished specimen showing sparse colony of confervities Mantiensis in a partly silicified area of an algae reef from the "Mantis beds" The white areas are calcite; the darker ones chalcedonic silica; enlarged 10 diameters. Specimen is originally from sec. 6, T. 18 S., R. 3 E. San Pete County, Utah. July 20, 1925. Plate 33-C in U.S. Geological Survey. Professional paper 154. 1929. #1:/Wyoming-Professional paper 154/bwh00208 ID. Bradley, W.H. 208 Polished vertical section of a compound algal head consisting of many small heads, each of which represents a single colony of Chlorellopsis coloniata Reis., these minor bands rest upon a zone of spongy algal deposit, which is separated from another similar zone below by a finely banded inorganic agate like zone; natural size. Specimen is from Tipton tongue of Green River formation in NE 1/4 NE 1/4 sec. 16, T.24 N., R. 102 W. Sweetwater County, Wyoming. 1923. Plate 44-A in U.S. Geological Survey. Professional paper 154. 1929. #1:/Colorado-Professional paper 154/bwh00209 ID. Bradley, W.H. 209 Upper surface of a tabellate reef with spongy surface; each molariform head is more or less columnar in section, though many of them are very irregular and complexly intergrown; 75% of natural size. Specimen is from about 530 feet above the base of the Green River formation on the divide between Douglas and East Salt Creeks. Garfield County, Colorado. August 18, 1925. Plate 43-A in U.S. Geological Survey. Professional paper 154. 1929. #1:/Utah-Professional paper 154/bwh00212 ID. Bradley, W.H. 212 Algae reef from the "Manti Beds" at Manti, the dark areas are partly silicified and contain the filamentous algae shown in plate 33 (see bwh00233, 234, or 235), natural size. Specimen is from a rock quarry east of the Mormon Temple, T. 18 N., R.e 3 E. San Pete County, Utah. July 20, 1925. Plate 45-B in U.S. Geological Survey. Professional paper 154. 1929. #1:/Utah-Professional paper 154/bwh00213 ID. Bradley, W.H. 213 Isolated algal head with digitate spongy structure; resembles in form and sculpturing the marine Lithothamnion, natural size. See also Bradley 247 and 248. Specimen is from Hells Canyon, sec. 22 T. 10 S., R. 25 E. Uintah County, Utah. September 15, 1925. Plate 41-B in U.S. Geological Survey. Professional paper 154. 1929. #1:/Colorado-Professional paper 154/bwh00221 ID. Bradley, W.H. 221 Small area of the polished specimen in Bradley 245; this shows a part of the oolitic sandstone which contains fragments of micro crystalline calcite with ferruginous oolite grains suspended in the positions in which they formed; fragments of algal limestone consisting almost wholly of Chlorellopsis and an unusually large oolite grains that show the wide banding characteristic of all the oolites in this bed. Enlarged 5 diameters. Specimen is from the basal part of an algae reef on the north side of White River, in the SW 1/4 sec. 30, T. 1 N., R. 95 W. Rio Blanco County, Colorado. Plate 48-B in U.S. Geological Survey. Professional paper 154. 1929. #1:/Wyoming-Professional paper 154/bwh00223 ID. Bradley, W.H. 223 Deposit formed around wood by chlorellopsis Reis, natural size. Specimen is from the base of the Laney shale member of the Green River formation, SE 1/4 sec.23, T. 25 N., R. 103 W. Sweetwater County, Wyoming. 1923. Plate 36-A in U.S. Geological Survey. Professional paper 154. 1929. #1:/Colorado-Professional paper 154/bwh00224 ID. Bradley, W.H. 224 Transverse section of the pitted Chlorellopsis reef shown in Bradley 205; showing the cores of sand filled ringed pits and the conoidal excrescences at their lower ends. This also shows the marked thickening of the algal layers between pit cores, natural size. Specimen is from about 138 feet below the top of the Green River formation in NE 1/4 SE 1/4 sec. 30, T. 4 N., R. 96 W. Moffat County, Colorado. August 1, 1925. Plate 38-A in U.S. Geological Survey. Professional paper 154. 1929. #1:/New York-Professional paper 154/bwh00226 ID. Bradley, W.H. 226 Recent algal deposit from Green Lake, the upper rough part is grayish green, owing to the dense felt algae, whose tips were only incrusted with lime. The lower, smoother part, which was buried in a soft limy mud is yellowish gray, dense and without living algae. Onondaga County, New York. July 1926. Plate 29-B in U.S. Geological Survey. Professional paper 154. 1929. #1:/Wyoming-Professional paper 154/bwh00227 ID. Bradley, W.H. 227 Polished transverse section of reef shown in Bradley photo 209; showing alternate algal and inorganic layers, the irregular light colored layers consists of the molds of Chlorellopsis coloniata and typical spongy algal deposit. The black and gray finely banded layers are of inorganic origin and owe their dark color to disseminated pyrite. Enlarged 3 diameters. Compare with the photomicrograph of thin section of part of the same reef shown in Bradley photo 242. Specimen is from near the base of the Tipton tongue of Green River formation in NW 1/4 16, T.24 N., R. 101 W. Sweetwater County, Wyoming. 1923. Plate 45-A in U.S. Geological Survey. Professional paper 154. 1929. #1:/Wyoming-Professional paper 154/bwh00228 ID. Bradley, W.H. 228 Polished specimen of algal pebbles showing details of internal structure, see published photo for details. Sweetwater County, Wyoming. 1923. Plate 47 in U.S. Geological Survey. Professional paper 154. 1929. #1:/Colorado-Professional paper 154/bwh00229 ID. Bradley, W.H. 229 Polished vertical section of Chlorellopsis reef, showing a large flat algal colony in part broken and in part deeply indented by a fragment of limestone that fell on it while the deposit was forming. Enlarged 5 diameters. Specimen is from SE 1/4 NE 1/4 sec. 18, T. 3 N., R. 95 W. Moffat County, Colorado. 1924. Plate 40-B in U.S. Geological Survey. Professional paper 154. 1929. #1:/Utah- Professional paper 154/bwh00230 ID. Bradley, W.H. 230 Polished vertical section of a reef formed of recumbent discoid colonies of Chlorellopsis coloniata Reis. The colonies near the center and upper parts of the specimen show faintly the concentric growth layers, which are convex outward along the radii of the colonies, natural size. Specimen is from 3700 feet above the base of the Green River formation on the west side of the Duchesne-Price mail road; T.6 S, R.7 W. Duchesne County, Utah. August 31, 1925. Plate 41-A in U.S. Geological Survey. Professional paper 154. 1929. #1:/Utah- Professional paper 154/bwh00233 ID. Bradley, W.H. 233 Confervites Mantiensis and associated coprolites; photomicrograph of cellular parts of Confervites Mantiensis Bradley: Tip of filament with large spherical cells and a wide sheath; enlarged 70 diameters. Specimen is originally from sec. 6, T. 18 S., R. 3 E. San Pete County, Utah. July 20, 1925. Portion is plate 33-A (2) in U.S. Geological Survey. Professional paper 154. 1929. #1:/Utah- Professional paper 154/bwh00234 ID. Bradley, W.H. 234 Confervites Mantiensis and associated coprolites; photomicrograph of cellular parts of Confervites Mantiensis Bradley: Tip of filament with quadrate cells and a bluntly tapered apical cell; resembling some species of Lyngbya; enlarged 70 diameters. Specimen is originally from sec. 6, T. 18 S., R. 3 E. San Pete County, Utah. July 20, 1925. Portion is plate 33-A (1) in U.S. Geological Survey. Professional paper 154. 1929. #1:/Utah- Professional paper 154/bwh00235 ID. Bradley, W.H. 235 Confervites Mantiensis and associated coprolites; photomicrograph of cellular parts of Confervites Mantiensis Bradley: filament with intercalary heterocyst resembling Nostoc; enlarged 70 diameters. Specimen is originally from sec. 6, T. 18 S., R. 3 E. San Pete County, Utah. July 20, 1925. Portion is plate 33-A (3) in U.S. Geological Survey. Professional paper 154. 1929. #1:/Wyoming-Professional paper 154/bwh00237 ID. Bradley, W.H. 237 Photomicrograph of typical lobate colony of chlorellopsis coloniata reis: showing the vague layering of the unicells. Enlarged 10 diameters. From the Tipton tongue of the Green River formation, NE cor. sec. 1, T. 24 N., R. 100 W: Sweetwater County, Wyoming. 1923. Plate 32-B in U.S. Geological Survey. Professional paper 154. 1929. #1:/Wyoming-Professional paper 154/bwh00238 ID. Bradley, W.H. 238 Photomicrograph of a thin section showing in detail the individual cells of chlorellopis reis; the walls of each hollow sphere consist of a mosaic of moderately coarse grained calcite crystals. The dark matrix is microcrystalline calcite. Enlarged 100 diameters; Specimen originally from NE cor. sec. 1, T. 24 N., R. 100 W: Sweetwater County, Wyoming. 1923. Portion is Plate 32-A in U.S. Geological Survey. Professional paper 154. 1929. #1:/Wyoming-Professional paper 154/bwh00239 ID. Bradley, W.H. 239 Photomicrograph of typical physico-chemical incrustation of calcite: showing the radial structure interrupted by thin concentric zones of limonite granules. The irregular black layer at the base and the small rounded cushion shaped area near the center are spongy algal deposits, which appear almost opaque because they consist of calcite that is almost cryptocrystalline. Enlarged 10 diameters. From the Tipton tongue of the Green River formation, sec. 21, T. 4 N., R. 101 W: Sweetwater County, Wyoming. 1923. Marks on this photo correspond to plate 34-C in U.S. Geological Survey. Professional paper 154. 1929. #1:/Wyoming-Professional paper 154/bwh00242 ID. Bradley, W.H. 242 Photomicrograph showing the association of the three principal types of structure found in the algae reefs of the Green River formation; small area of the reef shown in Bradley photo 209. In the lower right hand quarter is colony of the large spherical cells of Chlorellopsis colonata Reis, above that is a thick zone of typical spongy deposit, and at the top and also down the left side is an inorganic incrustation. Enlarged 10 diameters. From the Tipton tongue of the Green River formation, sec. 21, T. 4 N., R. 101 W: Sweetwater County, Wyoming. 1923. Top half is plate 34-A in U.S. Geological Survey. Professional paper 154. 1929. #1:/Wyoming-Professional paper 154/bwh00243 ID. Bradley, W.H. 243 Photomicrograph of part of an algae reef: showing thin radial limes of medium grained calcite, which may be casts of filamentous algae. The matrix is a spongy algal deposit of microcrystalline calcite, enlarged 21 diameters. Compare with Bradley photo 251. Center portion is plate 34-B in U.S. Geological Survey. Professional paper 154. 1929. #1:/Utah-Professional paper 154/bwh00244 ID. Bradley, W.H. 244 Confervites Mantiensis and associated coprolites; photomicrograph of cellular parts of Confervites Mantiensis Bradley: of small coprolites in a partly silicified groundmass of microcline calcite, associated with filamentous algae in an algae reef from the "Manti beds"; enlarged 30 diameters. Specimen is originally from sec. 6, T. 18 S., R. 3 E. San Pete County, Utah. July 20, 1925. Portion is plate 33-B in U.S. Geological Survey. Professional paper 154. 1929. #1:/Colorado-Professional paper 154/bwh00245 ID. Bradley, W.H. 245 Polished vertical section of a chlorellopsis reef; showing the irregular and vaguely radial arrangement of the lobate algal colonies; also a part of the oolitic sandstone upon which it rested, the lightest-gray areas are fine grained sandstone, the black grains are oolite grains and the medium toned gray areas are fragments of silty limestone, alga reefs and mud lumps. Natural size. From near the base of the Green River formation, SW 1/4 sec.30, T. 1 N., R. 95 W. Rio Blanco County, Colorado. August 11, 1924. Plate 35 in U.S. Geological Survey. Professional paper 154. 1929. #1:/Wyoming-Professional paper 154/bwh00246 ID. Bradley, W.H. 246 Polished section of a algal cobble, showing a large subangular limestone nucleus and three distinct stage of growth, natural size. Specimen is from transitional beds between the Tipton tongue of the Green River formation and the Cathedral Bluffs tongue of the Wasatch formation in NE 1/4 SE 1/4 sec. 15, T. 25 N., R. 102 W. Sweetwater County, Wyoming. 1923. Plate 46-A in U.S. Geological Survey. Professional paper 154. 1929. #1:/Utah-Professional paper 154/bwh00247 ID. Bradley, W.H. 247 Polished transverse section of the digitate reef shown in Bradley photo 248: natural size. Specimen is from Hells Canyon, sec. 22 T. 10 S., R. 25 E. Uintah County, Utah. September 15, 1925. Plate 42-A in U.S. Geological Survey. Professional paper 154. 1929. #1:/Utah- Professional paper 154/bwh00248 ID. Bradley, W.H. 248 Polished vertical section of a digitate algae reef; showing nuclei of dense cream colored limestone and two distinct stages of growth. The light gray finely speckled material between the columns of algal deposit is fine-grained limy sandstone: natural size. Specimen is from Hells Canyon, sec. 22 T. 10 S., R. 25 E. Uintah County, Utah. September 15, 1925. Plate 42-B in U.S. Geological Survey. Professional paper 154. 1929. #1:/New York-Professional paper 154/bwh00250 ID. Bradley, W.H. 250 Thin section of a recent algae reef from Green Lake, showing the tubular molds of the thalli of a filamentous alga. microcoeleus paludosa (Kutzing) Gommont in a matrix of microcrystalline calcite. The darkest molds contain bakelite with which the specimen was impregnated for sectioning. Enlarged 75 diameters. Onondaga County, New York. July 1926. Plate 30-A in U.S. Geological Survey. Professional paper 154. 1929. #1:/New York-Professional paper 154/bwh00251 ID. Bradley, W.H. 251 Thin section of a recent algae reef from Green Lake: showing the typical spongy structure of the microcrystalline calcite produced by a felt of fresh water algae. This also shows a portion of the recrystallized and denser surface layer in the upper left quadrant. Enlarged 30 diameters. Onondaga County, New York. July 1926. Plate 30-B in U.S. Geological Survey. Professional paper 154. 1929. #1:/Wyoming-Professional paper 154/bwh00253 ID. Bradley, W.H. 253 Thin section of an oolite from the Laney shale member of the Green River formation on Shell Creek, sec. 9, T. 12 N., R. 98 W., showing large oolite grains with eccentric growth zones. The dark granulose parts of these grains con of mechanically enmeshed silt and the clearer parts consist of fine-grained calcite partly replaced by chalcedonic silica. The groundmass consists of chalcedonic silica, with scattered micro crystals of calcite. Enlarged 11-1/2 diameters. Sweetwater County, Wyoming. 1923. Center portion is plate 48-A in U.S. Geological Survey. Professional paper 154. 1929. #1:/Arkansas-Professional paper 154/mhd00538 ID. Miser, H.D. 538 Weathered peridotite breccia in neck of Cretaceous volcano near Murfreesboro, contain diamonds: the hill in the distance is partly capped by a mass of Paleozoic sandstone that was lifted and carried upward during the volcanic activity. Pike County, Arkansas. Circa 1925. Plate 19-B in U.S. Geological Survey. Professional paper 154. 1929. #1:/Arkansas-Professional paper 154/mhd00540 ID. Miser, H.D. 540 Weathered peridotite breccia in neck of Cretaceous volcano near Murfreesboro, contain diamonds: shows diamonds being mined by hydraulicking. Pike County, Arkansas. Circa 1925. Plate 19-A in U.S. Geological Survey. Professional paper 154. 1929. #1:/Texas-Professional paper 154/slw00612 ID. Stephenson, L.W. 612 Irregularly bedded sand and clay of the Woodbine sand in road cut leading down to the lower ferry at Arthurs Bluff, Red River; most of the fossil leaves from this locality described by E.W. Berry were obtained in the lower part of the section shown in the picture. Lamar County, Texas. 1924. Plate 25-B in U.S. Geological Survey. Professional paper 154. 1929. #1:/Texas-Professional paper 154/slw01147 ID. Stephenson, L.W. 1147 Tuffaceous sandstone of the Woodbine formation; at Silver City ferry, Red River, Red River County, Texas. October 31, 1924. Plate 25-A in U.S. Geological Survey. Professional paper 154. 1929. #1:/Texas-Professional paper 154/slw01175 ID. Stephenson, L.W. 1175 Tuffaceous sandstone of the Woodbine formation: below the lower ferry at Arthurs Bluff, Red River. Lamar County, Texas. April 1, 1925. Plate 26-A in U.S. Geological Survey. Professional paper 154. 1929 #1:/Texas-Professional paper 154/slw01178 ID. Stephenson, L.W. 1178 Tuffaceous sand of the Woodbine formation, partly indurated to concretionary masses, the upper end of Hyatts Bluff, Red River, Fannin County, Texas. April 3, 1925. Plate 27-B in U.S. Geological Survey. Professional paper 154. 1929. #1:/Texas-Professional paper 154/slw01176 ID. Stephenson, L.W. 1176 Lens of tuffaceous sand in laminated sandy clay of the Woodbine formation, above the lower ferry at Arthurs Bluff, Red River. Lamar County, Texas. April 1, 1925. Plate 26-A in U.S. Geological Survey. Professional paper 154. 1929. #1:/Nevada-Professional paper 162/hdf00288 ID. Hewett, D.F. 288 Spring Mountains at the mouth of Porter Wash, the Anchor mill and waste dumps are shown in the left center; the mine is in the shadow on the left. The Bullion mill is in the right center; the mine lies higher on the right. The Valentine mine is at the extreme left. Southwest from sec. 24 T. 25 S., R. 58 E. Clark County, Nevada. Circa 1921. Plate 4-B (frontispiece) in U.S. Geological Survey. Professional paper 162. 1931. #1:/Nevada-Professional paper 162/hdf00297 ID. Hewett, D.F. 297 Trace of a normal fault in the east half of sec. 27, T. 25 S., R.58 E. Bullion dolomite (light) on the right; Yellowpine limestone (dark) on the left. The Yellowpine limestone is not altered to dolomite. Clark County, Nevada. Circa 1921. Plate 15-A, with a graphic, in U.S. Geological Survey. Professional paper 162. 1931. #1:/Nevada-Professional paper 162/hdf00303 ID. Hewett, D.F. 303 Limestones of the lower part of the Bird Spring formation in sec. 16, T. 25S, R. 58 E.; these closely folded limestones are adjacent to the Puelz thrust fault, which crosses the low saddle on the left. The Bullion dolomite forms the hill on the extreme left. Clark County, Nevada. November 22, 1921. Plate 7-B, with graphics, in U.S. Geological Survey. Professional paper 162. 1931. #1:/Nevada-Professional paper 162/hdf00309 ID. Hewett, D.F. 309 Dolomitized zone (light) in bed of limestone of the Bird Spring formation in sec. 33, T. 25 S., R. 58 E., view taken diagonally downward toward a bedding plane. Dolomitization has progressed outward from a median fracture 4 feet to the right and to the left (limit is shown by head of hammer). Clark County, Nevada. Circa 1921. Plate 18-B in U.S. Geological Survey. Professional paper 162. 1931. #1:/Nevada-Professional paper 162/hdf00310 ID. Hewett, D.F. 310 Limestone beds near the base of the Bird Spring formation locally altered to dolomite (white) near the Silver Gem mine in Devil Canyon, in sec. 33, T. 25 S., R. 58 E. Dolomitization has progressed outward (to the left) from a series of minor fractures (largely to the right of the field). Clark County, Nevada. Circa 1921. Plate 18-A in U.S. Geological Survey. Professional paper 162. 1931. #1:/Nevada-Professional paper 162/hdf00323 ID. Hewett, D.F. 323 Trace of the Keystone thrust west of Goodsprings in the SW 1/4 sec. 29, T. 24 S., R. 58 E; on the right crumpled limestones (now dolomitized) of the Bird Spring from (Pennsylvanian): on the left thin bedded dolomite of the Goodsprings formation (Upper Cambrian). The trace is marked by a reddish zone formed by the oxidation of pyrite the curve is due to relief and perspective. Clark County, Nevada. Circa 1921. Plate 14-B, with a graphic, in U.S. Geological Survey. Professional paper 162. 1931. #1:/Nevada-Professional paper 162/hdf00327 ID. Hewett, D.F. 327 Thin bedded dolomites of the upper part of the Goodsprings formation in secs. 28, 26 and 30, T. 24 S., R.58E: due east from the hill (altitude 5,124 feet west of Kirby Wash toward Columbia Pass and Goodsprings. The town is hidden by the hill in the middle distance. Clark County, Nevada. Circa 1921. Plate 5-A in U.S. Geological Survey. Professional paper 162. 1931. #1:/Nevada-Professional paper 162/hdf00329 ID. Hewett, D.F. 329 Thin bedded dolomite of the Goodsprings formation broken by two small thrust faults; the ridge lies due west of the Little Devil Peak, on the west side of the range, in sec. 30, T. 25 S., R. 58 E. Mesquite Valley appears in the distance, view northwest. Clark County, Nevada. Circa 1921. Plate 16-B, with graphics, in U.S. Geological Survey. Professional paper 162. 1931. #1:/Nevada-Professional paper 162/hdf00330 ID. Hewett, D.F. 330 Trace of the Milford thrust at the head of Milford Wash in sec. 33, T. 25 S., R.58 E: on the left, thin bedded limestones near the base of the Sultan formation, upturned under the fault; on the right thin bedded dolomite near the top of the Goodsprings formation (Upper Cambrian) turned down toward the fault. The Ironside dolomite is marked on the published photo. Clark County, Nevada. Circa 1921. Plate 16-A, with graphics, in U.S. Geological Survey. Professional paper 162. 1931. #1:/Nevada-Professional paper 162/hdf00334 ID. Hewett, D.F. 334 Supai formation has overlain by the Kaibab limestone east of Cottonwood Pass, in sec. 13 T. 23 S., R. 58 E. The conspicuous sandstone 460 feet thick forms the middle part of the Supai formation. It is overlain successively by gypsum bearing sandy shale at the top of that formation and the two massive beds of limestone of the Kaibab limestone. Potosi Mountain in the distance. Clark County, Nevada. Circa 1921. Plate 8-A in U.S. Geological Survey. Professional paper 162. 1931. #1:/Nevada-Professional paper 162/hdf00338 ID. Hewett, D.F. 338 Northwest toward ridge in S. 1/2 sec. 4, T. 23 S., R. 58 E.; the spur is capped by the sandstone at the base of the Bird Spring formation. The prominent cliff is the Yellowpine limestone, the top member of the Monte Cristo limestone, underlain successively by the Arrowhead limestone, Bullion dolomite and the Anchor limestone members. Clark County, Nevada. Circa 1921. Plate 7-A in U.S. Geological Survey. Professional paper 162. 1931. #1:/Nevada-Professional paper 162/hdf00341 ID. Hewett, D.F. 341 Diablo Grande Peak from the northwest, in sec. 10, T. 26 S., R. 58 E., the mountain is a plug of rhyolite about a mile in diameter intrusive into Paleozoic limestones and dolomite that are but slightly deformed. The foothills in the foreground are made up of dolomite of the Goodsprings formation. Clark County, Nevada. Circa 1921. Plate 9-B in U.S. Geological Survey. Professional paper 162. 1931. #1:/Nevada-Professional paper 162/hdf00343 ID. Hewett, D.F. 343 Contact of intrusive rock of Diablo Grande Peak and limestone of the Spring Mountains; the rhyolite is on the right and the limestones of the Monte Cristo formation on the left. The limestones are bleached and altered to dolomite in a zone 100 to 200 feet wide along the contact. Clark County, Nevada. Circa 1921. Plate 10-A in U.S. Geological Survey. Professional paper 162. 1931. #1:/Nevada-Professional paper 162/hdf00352 ID. Hewett, D.F. 352 Boss mine, NE 1/4 sec. 34, T. 24 S., R. 57 E. The workings explore a crushed zone which, lies between dolomitized limestone of the Monte Cristo formation on the right (east) and similar rocks of the Sultan formation on the left (west). Clark County, Nevada. Circa 1921. Plate 33-A in U.S. Geological Survey. Professional paper 162. 1931. #1:/Nevada-Professional paper 162/hdf00355 ID. Hewett, D.F. 355 Sultan mine, south center of sec. 20, T. 25 S., R. 58 E., the mine workings are in a breccia of dolomite fragments representing dolomitized limestones of the Bird Spring formation. The thin bedded limestones above the mine workings are in the lower part of the Sultan formation. The lowest tunnel shown is No. 1 or the main working level. Clark County, Nevada. Circa 1921. Plate 35-B in U.S. Geological Survey. Professional paper 162. 1931. #1:/Nevada-Professional paper 162/hdf00358 ID. Hewett, D.F. 358 Form a panorama of Goodsprings, town and valley, Spring Mountain and Potosi Mountain on the left; Bird Spring Range on the right; taken from small hill in E 1/2 sec. 26, T.24 E., R. 58 E. Clark County, Nevada. Circa 1921. Plate 4-A (frontispiece) in U.S. Geological Survey. Professional paper 162. 1931. #1:/Nevada-Professional paper 162/hdf00359 ID. Hewett, D.F. 359 Form a panorama of Goodsprings, town and valley, Spring Mountain and Potosi Mountain on the left; Bird Spring Range on the right; taken from small hill in E 1/2 sec. 26, T.24 E., R. 58 E. Clark County, Nevada. Circa 1921. Plate 4-A (frontispiece) in U.S. Geological Survey. Professional paper 162. 1931. #1:/Nevada-Professional paper 162/hdf00362 ID. Hewett, D.F. 362 Neck of latite intrusive into Devonian limestone in the northeast corner of sec. 19, T. 25 S. R. 58 E., the limestone resists erosion and forms a persistent ridge, whereas the igneous rock is readily disintegrated and worn away. Clark County, Nevada. Circa 1921. Plate 10-B, with graphics, in U.S. Geological Survey. Professional paper 162. 1931. #1:/Nevada-Professional paper 162/hdf00365 ID. Hewett, D.F. 365 Thin bedded dolomite of the Goodsprings formation (upper Cambrian) thrust upon the Aztec sandstone (Jurassic) in northeast corner of sec. 21, T. 22 S., R. 58 E. The contact marks the trace of the Keystone thrust. The curve in the trace is due to local irregularities in the surface and to perspective. Clark County, Nevada. Circa 1921. Plate 14-A, with a graphic, in U.S. Geological Survey. Professional paper 162. 1931. #1:/Nevada-Professional paper 162/hdf00366 ID. Hewett, D.F. 366 Aztec sandstone overlying Chinle formation in sec. 22, T. 22 S., R. 58 E., the Aztec sandstone is overlain by thin bedded dolomite of the Goodsprings formation from which it separated by the Keystone thrust fault. Compare with Hewett, photo 365. Clark County, Nevada. Circa 1921. Plate 8-B in U.S. Geological Survey. Professional paper 162. 1931. #1:/Nevada-Professional paper 162/hdf00368 ID. Hewett, D.F. 368 Potosi Mountain from the northwest, showing faults, in sec. 5. T. 23 S. R. 58 E; showing relation between Sultan limestone and Goodsprings dolomite. Plate 13-B is a detail sketch of this photograph. Clark County, Nevada. Circa 1921. Plate 13-A, with graphics, in U.S. Geological Survey. Professional paper 162. 1931. #1:/Nevada-Professional paper 162/hdf00371 ID. Hewett, D.F. 371 Potosi mine, south center of sec. 12, T. 23 S., R. 57 E., the mine workings explore a zone at the base of the Yellowpine limestone. Clark County, Nevada. Circa 1921. Plate 33-B in U.S. Geological Survey. Professional paper 162. 1931. #1:/Nevada-Professional paper 162/hdf00372 ID. Hewett, D.F. 372 Bullion mine (above) and mill (below), center of sec. 23, T. 25 S., R. 58 E. The ore deposit occurs at the base of the Bullion dolomite; the ravine on the right marks the position of a late normal fault. Bullion dolomite member of the Monte Cristo limestone; Anchor limestone member of the Monte Cristo limestone; Dawn limestone member of the Monte Cristo limestone. Clark County, Nevada. Circa 1921. Plate 38-A, with graphics, in U.S. Geological Survey. Professional paper 162. 1931. #1:/Nevada-Professional paper 162/hdf00373 ID. Hewett, D.F. 373 Anchor mine in S 1/2 sec. 23, T. 25 S., R. 58 E. The ore deposit occurs in the Anchor limestone. The ravine marks the position of a late normal fault. Bird Spring formation; Bullion dolomite member of Monte Cristo limestone; Anchor limestone member of Monte Cristo limestone. Clark County, Nevada. Circa 1921. Plate 38-B, with graphics, in U.S. Geological Survey. Professional paper 162. 1931. #1:/Nevada-Professional paper 162/hdf00375 ID. Hewett, D.F. 375 Wedge of Bullion dolomite separated by faults from blocks of Yellowpine limestone, view northwest toward ridge west of the Bullion mine in sec. 23, T. 25 S., R. 58 E. Clark County, Nevada. Circa 1921. Plate 15-B, with graphics, in U.S. Geological Survey. Professional paper 162. 1931. #1:/Nevada-Professional paper 162/hdf00376 ID. Hewett, D.F. 376 Block of Valentine limestone member of Sultan formation preserved unaltered in a large body of dolomite east of Crystal Pass in sec. 1, T. 25 S, R.58 E. Clark County, Nevada. Circa 1921. Plate 17-B, with labels, in U.S. Geological Survey. Professional paper 162. 1931. #1:/Nevada-Professional paper 162/hdf00377 ID. Hewett, D.F. 377 Stratum of limestone preserved unaltered in midst of dolomitized limestone 200 feet above the base of the Bird Spring formation in sec. 4, T. 25 S., R. 58 E., the workings of the Hoosier mine lie in the foreground. Clark County, Nevada. Circa 1921. Plate 19-A, labels and a graphic, in U.S. Geological Survey. Professional paper 162. 1931. #1:/Nevada-Professional paper 162/hdf00380 ID. Hewett, D.F. 380 Ninety-nine Mine, W 1/2 sec. 15, T. 23 S., R. 58 E., the ridge on the left is made up of limestones near the base of the Bird Spring formation which dip eastward (left). The Ninety-nine fault passes through the ravine in the center. Clark County, Nevada. Circa 1921. Plate 31-B in U.S. Geological Survey. Professional paper 162. 1931. #1:/Nevada-Professional paper 162/hdf00385 ID. Hewett, D.F. 385 Pleistocene cemented gravel, which caps the group of low hills west of Goodsprings in sec. 22, T. 24 S., R. 58 E. The coarse fragments are limestone and dolomite, and the cement is crystalline calcite. Clark County, Nevada. Circa 1921. Plate 10-B, with graphics, in U.S. Geological Survey. Professional paper 162. 1931. #1:/Nevada-Professional paper 162/hdf00386 ID. Hewett, D.F. 386 Keystone mine NW 1/4 sec. 30, T. 24 S. R. 58 E. The slopes back of the mine are made up of thin bedded dolomite of the Goodsprings formation. Clark County, Nevada. Circa 1921. Plate 31-A in U.S. Geological Survey. Professional paper 162. 1931. #1:/Nevada-Professional paper 162/hdf00387 ID. Hewett, D.F. 387 Yellow pin mine and camp, NW 1/4 sec. 20, T. 24 S., R.54 E., the slopes of Shenandoah Peak (crest of ridge) are made up of thin bedded limestones of the Bird Spring formation. The porphyry sill underlies the smooth slope behind the hoist. Clark County, Nevada. Circa 1921. Plate 35-A in U.S. Geological Survey. Professional paper 162. 1931. #1:/Nevada-Professional paper 162/hdf00416 ID. Hewett, D.F. 416 Along old valley northwest of Charleston Peak; Charleston Peak is 30 miles distant in center. The dark hill in center foreground is covered with quartzite boulders. The depressions between the hill and the peak are remnants of an old valley which crossed the Spring Mountains and along which the boulders were brought to their present position. The drainage of the old valley is now diverted to Pahrump, Las Vegas, and Ivanpah Valleys, which form three separate baT Plate 12-A in U.S. Geological Survey. Professional paper 162. 1931. #1:/Nevada-Professional paper 162/hdf00438 ID. Hewett, D.F. 438 Details of Anchor limestone showing chert nodules in outcrop; 1,000 feet west of Milford Mine in sec. 6 T. 26 S., R. 58 E. Clark County, Nevada. December 12, 1924. Plate 6-A in U.S. Geological Survey. Professional paper 162. 1931. #1:/Nevada-Professional paper 162/hdf00441 ID. Hewett, D.F. 441 Crystal Pass limestone exposed in a cliff 15 feet high in sec. 30, T.26, S. R. 59 E., south end of Spring Mountains. Clark County, Nevada. December 12, 1924. Plate 5-B in U.S. Geological Survey. Professional paper 162. 1931. #1:/Nevada-Professional paper 162/hdf00443 ID. Hewett, D.F. 443 Arrowhead limestone southeast of the Yellow Pine mine in center of sec. 20 T. 54 S., R. 58 E. Clark County, Nevada. December 13, 1924. Plate 6-B in U.S. Geological Survey. Professional paper 162. 1931. #1:/Colorado-Professional paper 166/ccw00173 ID. Cross, C.W. 173 Lizard Head, this is the most conspicuous isolated spire in the San Juan region. It rises nearly 500 feet, with almost vertical walls, from the summit of the mountain on which it stands. The tip of the spire is 13,156 feet above sea level. San Miguel County, Colorado. 1894. Plate 13, U.S. Geological Survey Professional paper 166. 1932. #1:/Colorado-Professional paper 166/ccw00209 ID. Cross, C.W. 209 Potosi Peak, this view was taken from the south side of Stony Mountain. Canyon Creek is in the foreground. Potosi Peak is 13,763 feet above sea level and is one of the conspicuous features in the Silverton quadrangle. It is carved out of nearly horizontal beds of volcanic formations. It has loaned its name to the Potosi volcanic series. Ouray County, Colorado. 1895. Plate 14, U.S. Geological Survey Professional paper 166. 1932. Figure 7, U.S. Geological Survey, Folio 57, 1899. #1:/Colorado-Professional paper 166/ccw00210 ID. Cross, C.W. 210 Sneffels Peak, this peak is a mass of diorite and gabbro cutting up through the bedded volcanic series. This view was taken from the saddle west of Stony Mountain. Sneffels Peak (14,143 feet) is the highest peak in the bold mountain front at the northwest margin of the range. It is a conspicuous monadnock Ouray County, Colorado. 1895. Plate 5- B, U.S. Geological Survey Professional paper 166. 1932. Figure 8, U.S. Geological Survey. Folio 57. 1899. #1:/Colorado-Professional paper 166/ccw00241 ID. Cross, C.W. 241 Mount Wilson, 14,250 feet above sea level is in a group of rugged peaks near the western margin of the San Juan region. Although separated from the San Juan Mountains by wide valleys, the Wilson group has been throughout its geologic history intimately related to the San Juan Mountains. Dolores County, Colorado 1895. Plate 4-B, U.S. Geological Survey Professional paper 166. 1932. Figure 17, U.S. Geological Survey, Folio 57, 1899. #1:/Colorado-Professional paper 166/ccw00293 ID. Cross, C.W. 293 Western peaks of the La Plata Mountains, these mountain forms are due to the dissection of a secondary dome on the southwest flank of the broad San Juan uplift. La Plata County, Colorado. 1897. Plate 19-B, U.S. Geological Survey Professional paper 166. 1932. #1:/Colorado-Professional paper 166/ccw00297 ID. Cross, C.W. 297 Mesa Verde from the northeast, from a high position south of Mancos, showing the bold escarpment of Mesa Verde and the dark forest on top in left background. At the north end (right) the mesa rises about 1,000 feet above the lowland of the Mancos River valley. Photo by W.T. Lee. Montezuma County, Colorado. 1897. Plate 5-A, U.S. Geological Survey Professional paper 166. 1932. Figure 3, U.S. Geological Survey. Folio 60. 1901. #1:/Colorado-Professional paper 166/ccw00312 ID. Cross, C.W. 312 Valley of Animas River near Animas City, view southeast over Animas city; Durango at right. Low ridges of left middle ground are terminal moraine of Wisconsin stage of Animas glacier; outwash terrace extends thence downstream to right. Above the bluff back of this are partly eroded terminal moraine and outwash terrace of Durango stage of glaciation. The valley between the high terrace and the low terrace was eroded to a depth of about 250 feet between the Durango and Wisconsin stages of glaciation. Photo by A.C. Spencer. La Plata County, Colorado. 1897. Plate 25-A, U.S. Geological Survey Professional paper 166. 1932. #1:/Colorado-Professional paper 166/ccw00313 ID. Cross, C.W. 313 Moraines in the Animas Valley near Animas City; the low ridges crossing the bottom land are the terminal moraine of the Wisconsin stage of the Animas glacier. Downstream, to the right, is the outwash terrace. On the brushy ridge between this and the mountain in the right background is the terminal moraine of the Durango stage. Photo by A.C. Spencer. La Plata County, Colorado. November 1897. Plate 25-B, U.S. Geological Survey Professional paper 166. 1932. #1:/Colorado-Professional paper 166/ccw00405 ID. Cross, C.W. 405 Summit region in the midst of the San Juan Mountains, view north from saddle east of Dolly Varden Mountain. In the distance at right, is Uncompahgre Peak (14, 306) feet; in the middle is Wetterhorn (13,589 feet). Much of the rolling surface is at or near the San Juan peneplain horizon. High peaks are monadnocks; deep canyons represent the work of streams and valley glaciers during two later cycles of erosion. Photo by E. Howe. Hinsdale County, Colorado. 1899. Plate 4-A, U.S. Geological Survey Professional paper 166. 1932. #1:/Colorado-Professional paper 166/ccw00412 ID. Cross, C.W. 412 Talus slopes near the head of North Fork of Henson Creek, Silverton quadrangle, great quantities of rock waste have accumulated upon the flanks of this mountain. As indicated by the flow lines in the middle distance, the angular debris has in places, crept downward. Hinsdale County, Colorado. September 1899. Plate 31, U.S. Geological Survey Professional paper 166. 1932. #1:/Colorado-Professional paper 166/ccw00417 ID. Cross, C.W. 417 Grenadier Range and Needle Mountains, the jagged peaks of the Grenadiers intervene in front of the cloud-draped pinnacles called the Needle Mountains, as viewed from the divide at the head of Whitehead Gulch. San Juan County, Colorado. 1899. Plate 12-B, U.S. Geological Survey Professional paper 166. 1932. #1:/Colorado-Professional paper 166/ccw00427 ID. Cross, C.W. 427 San Juan Mountains near head of Elk Creek; the gently rounded upland in the central portion of this area is the Continental Divide and represents the horizon of the San Juan peneplain. The peaks and ridges in the distance are monadnocks above the peneplain. San Juan County, Colorado. 1899. Plate 21-A, U.S. Geological Survey Professional paper 166. 1932. #1:/Colorado-Professional paper 166/ccw00428 ID. Cross, C.W. 428 San Juan Mountains near head of Elk Creek; the gently rounded upland in the central portion of this area is the Continental Divide and represents the horizon of the San Juan peneplain. The peaks and ridges in the distance are monadnocks above the peneplain. San Juan County, Colorado. 1899. Plate 21-A, U.S. Geological Survey Professional paper 166. 1932. #1:/Colorado-Professional paper 166/ccw00465 ID. Cross, C.W. 465 Valley of Animas River at Silverton; Silverton is in the center of one of the more active mining districts of the San Juan Mountains. San Juan County, Colorado. August 23, 1900. Plate 34-A, U.S. Geological Survey Professional paper 166. 1932. #1:/Colorado-Professional paper 166/ccw00513 ID. Cross, C.W. 513 Glacial erosion in Needle Mountains; the smoothly rounded surfaces, near the head of Florida Canyon, are the result of abrasion by ice of the Wisconsin stage of glaciation. The ponds occupy hollows gouged out of the rock by the glacier. The jagged crests and weathered cliffs were above the limits of vigorous glaciation. La Plata County, Colorado. July 20, 1901. Plate 20-B, U.S. Geological Survey Professional paper 166. 1932. Figure 3, U.S. Geological Survey, Folio 131. 1905. #1:/Colorado-Professional paper 166/ccw00537 ID. Cross, C.W. 537 Glacial basins at head of Arrastre Gulch; Little Giant Basin at the left; Silver Lake Basin in the center; in the foreground there are glacial gravel deposits, which form the bench at the left of the stream courses. The gulch had a distinct U-shaped form when the ice melted away. Recent talus accumulations have sharpened somewhat the valley contour and made it more V-shaped. San Juan County, Colorado. October 14, 1901. Plate 20-A, U.S. Geological Survey Professional paper 166. 1932. #1:/Colorado-Professional paper 166/ccw00541 ID. Cross, C.W. 541 Torrential fans in Animas Valley, Silverton quadrangle; the two cone shaped piles of debris that mantle the lower slopes of this valley wall have accumulated since the disappearance of the last glaciers from this valley. The apex of each of the two coalesced fans is at the lower end of V-shaped gulch from which most of the fan debris has been removed by mountain torrents. San Juan County, Colorado. September 28, 1901. Plate 32-B, U.S. Geological Survey Professional paper 166. 1932. #1:/Colorado-Professional paper 166/ccw00556 ID. Cross, C.W. 556 Rock stream in Horseshoe Basin, Silverton quadrangle, is high above the tree line, where changes in temperature and frost action produce vast quantities of angular debris. Talus cones accumulate at the base of steep slopes, and in places, as shown here, the angular detritus moves slowly down the canyon as a great rock stream. Hinsdale County, Colorado. September 1, 1901. Plate 29-B, U.S. Geological Survey Professional paper 166. 1932. #1:/Colorado-Professional paper 166/ccw00594 ID. Cross, C.W. 594 Animas Valley above Animas City, there is topographic unconformity between the maturely eroded upland and the youthful gulches cutting the lower slope. The steepness of that slope and the truncation of interstream spurs are largely due to glacial abrasion. The apparent old age of the stream is due to its meandering on an alluvial flat. This flat is underlain by silt deposited above the dam formed by the Wisconsin terminal moraine. As the outlet through the dam was deepened, many oxbows were cut off. Similar conditions are found in several other valleys. La Plata County, Colorado. October 20, 1903. Plate 15, U.S. Geological Survey Professional paper 166. 1932. #1:/Colorado-Professional paper 166/ccw00601 ID. Cross, C.W. 601 Needle Mountains; into the midst of the range, with a conspicuous cirque or amphitheater basin in the middle ground; the bare rock surfaces on the slopes of most of the mountain peaks were smoothed and polished by the late Wisconsin ice. San Juan County, Colorado. August 14, 1903. Plate 12-A, U.S. Geological Survey Professional paper 166. 1932. #1:/Colorado-Professional paper 166/ccw00624 ID. Cross, C.W. 624 Weathered granite; this view was taken at the east edge of Endlich Mesa, in the Needle Mountain quadrangle. It illustrates well the features that have resulted from the weathering of ancient granite rocks in the core of the range. La Plata County, Colorado. September 25, 1903. Plate 19-A, U.S. Geological Survey Professional paper 166. 1932. #1:/Colorado-Professional paper 166/ccw00687 ID. Cross, C.W. 687 Uncompahgre Valley, in the foreground are ranch lands such as extend far into the mountains, in the background is Ouray at entrance to canyons through which roads and trails lead to the mining camps. Ouray County, Colorado. August 30, 1904. Similar to Plate 34-B, U.S. Geological Survey Professional paper 166. 1932. #1:/Colorado-Professional paper 166/ccw00822 ID. Cross, C.W. 822 La Plata sandstone, the light colored band at the top of the cliffs, represents the Jurassic La Plata sandstone. Beneath it occur the Dolores (Triassic and Jurassic (?) and Cutler (Permian) formations. The view was taken in the valley of the Dolores River. Mesa County, Colorado. July 6, 1905. Plate 6-A, U.S. Geological Survey Professional paper 166. 1932. #1:/Colorado-Professional paper 166/ccw0884a ID. Cross, C.W. 884a Hermosa formations, the bold cliffs at the left are composed of the Hermosa formation. The view was taken from the top of the cliffs west of the Ignacio Reservoir, looking northwestward toward Engineer Mountain and Potato Hill. La Plata County, Colorado. 1908. Plate 6-B, U.S. Geological Survey Professional paper 166. 1932. #1:/Colorado-Professional paper 166/ccw00890 ID. Cross, C.W. 890 Rico Mountains. This secondary dome of mountains is west of the main San Juan Mountain area. Its superior elevation has led to a greater degree of dissection than has developed in the foreground of this view. La Plata County, Colorado. 1908. Plate 18-B, U.S. Geological Survey Professional paper 166. 1932. #1:/Colorado-Professional paper 166/ccw00894 ID. Cross, C.W. 894 High mountain lake in the San Cristobal quadrangle; this lake without a name about 1 mile north of the pass where the trail crosses from the Los Pinos River into the valley of Weminuche Creek. The granite area on the far side of the lake has been severely glaciated, all loose material has been removed and the rock surfaces are polished and striated. At the right the slope is composed of San Juan tuff, much disintegrated. In the distance there are bedded volcanic formations resting upon the granite. Hinsdale County, Colorado. 1908. Plate 21-B, U.S. Geological Survey Professional paper 166. 1932. #1:/Colorado-Professional paper 166/ccw00895 ID. Cross, C.W. 895 High mountain lake in the San Cristobal quadrangle; this lake without a name about 1 mile north of the pass where the trail crosses from the Los Pinos River into the valley of Weminuche Creek. The granite area on the far side of the lake has been severely glaciated, all loose material has been removed and the rock surfaces are polished and striated. At the right the slope is composed of San Juan tuff, much disintegrated. In the distance there are bedded volcanic formations resting upon the granite. Hinsdale County, Colorado. 1908. Plate 21-B, U.S. Geological Survey Professional paper 166. 1932. #1:/Colorado-Professional paper 166/ccw01011 ID. Cross, C.W. 1011 Recent landslide in valley of West Lost Trail Creek, in the foreground is a fresh landslide, such as are numerous in the high basin region of the mountains. The fragments are angular and the ridges roughly parallel the slope from which the debris slid; such characteristics aid in distinguishing landslide debris from morainic deposits. Hinsdale County, Colorado. September 21, 1909. Plate 29-A, U.S. Geological Survey Professional paper 166. 1932. #1:/Colorado-Professional paper 166/ccw01063 ID. Cross, C.W. 1063 Santa Maria Lake; this lake is held between morainic deposits, in the foreground, and a huge mass of landslide material at the farther end, which came down from Bristol Head. The lake serves as a reservoir for water used in irrigating parts of San Luis Valley. Mineral County, Colorado. September 24. 1911. Plate 18-A, U.S. Geological Survey Professional paper 166. 1932. #1:/Colorado-Professional paper 166/howe0246 ID. Howe, E. 246 Northward dipping strata in the Uncompahgre valley at Ouray; the clearly defined layers are of Paleozoic and Mesozoic age. They were uplifted and arched at the end of the Mesozoic era. Overlying the sedimentary rocks are thick accumulations of volcanic rocks. The village of Ouray is located on a torrential fan. Ouray County, Colorado. August 29, 1904. Plate 7-A, U.S. Geological Survey Professional paper 166. 1932. #1:/Colorado-Professional paper 166/hjf00158 ID. Hunter, J.F. 158 Black Canyon of the Gunnison River, view downstream from automobile road on the rim. Denver & Rio Grande Western Railroad on right bank, 1000 feet below. Curecanti Needle in middle. This canyon has been cut in resistant crystalline rock since the Cerro stage of glaciation, hence its youthful character. Gunnison County, Colorado. July 10, 1913. Plate 17-C, U.S. Geological Survey Professional paper 166. 1932. #1:/Montana-Professional paper 174/wil00277 ID. Willis, B. 277 Pre-Wisconsin drift of Rocky Mountain glaciers, Glacier National Park, on remnants of the Flaxville plain (highest or No. 1 bench): Kennedy Ridge, 5 miles east of Chief Mountain. July 1901. Plate 14-B, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/sec00277 ID. Stebinger, E.C. 277 Laminated clays of glacial lake, Cut Bank, on the east bank of Little Rocky Coulee, in sec. 1, T. 34 N., R. 7W. Glacier County, Montana. 1913. Plate 25-B, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/sec00157 ID. Stebinger, E.C. 157 Moraines of the Keewatin ice sheet, early Wisconsin Stage: Terminal moraine about 25 miles north of Cut Bank, in sec. 14, T. 37 N., R. 7W. Looking east along the crest of the moraine where it lies on a gravelly bench 4,300 to 4,400 feet above sea level at the crest of the bluff south of the Milk River. Glacier National Park. Montana. circa 1915. Plate 38-A, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/caj00767 ID. Collier, A.J. 767 Glaciolacustrine deposits overlying glacial till: on Peoples Creek in Fort Belknap Indian Reservation, sec. 20, T. 29 N., R. 25 E., 15 miles southwest of Dodson, Blaine County, Montana. 1925. Plate 40-A, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/caj00769 ID. Collier, A.J. 769 Till of Keewatin ice sheet on overlying Judith River formation: on Peoples Creek in Fort Belknap Indian Reservation, sec. 20, T. 29 N., R. 25 E., 15 miles southwest of Dodson Blaine County, Montana. 1925. Plate 40-B, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/fca00066 ID. Fisher, C.A. 66 Missouri River: Rainbow Falls prior to the construction of the dam; fall 37 feet. Cascade County, Montana. Before 1906. Plate 32-B, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/sec0275a ID. Stebinger, E.C. 275a Moraines of Two Medicine Glacier, Blackfeet Indian Reservation: 8 miles northeast of Browning, along the crest, showing the front of the moraine curving off to the left in the background. Glacier County, Montana. circa 1915. Plate 42-C, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/caj0564a ID. Collier, A.J. 564 Flaxville Plateau 15 to 20 miles west of Scobey, Daniels County, Montana. 1915. Plate 10-A, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/caj00589 ID. Collier, A.J. 589 Cross bedding of Flaxville gravel 18 miles southwest of Scobey, Daniels County, Montana. 1915. Plate 10-C, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/caj00620 ID. Collier, A.J. 620 Outcrop of cemented Flaxville gravel in escarpment of plateau, 6 miles northwest of Opheim, sec. 36, T. 37 N., R. 39 E. Valley County, Montana. 1915. Plate 10-B, U.S. Geological Survey Professional paper 174. 1932. #1:/California-Professional paper 110/knop0082 ID. Knopf, A. 82 Black schist mass apparently capping the granite along the crest of the Sierra Nevada; seen from Montezuma Canyon, east side of Owens Valley Inyo County, California. 1912. Plate 18-A, U.S. Geological Survey Professional paper 110. 1918. #1:/California-Professional paper 110/knop0085 ID. Knopf, A. 85 Basalt plateau southeast of Keeler: Inyo County, California. 1912. Plate 11-A, U.S. Geological Survey, Professional paper 110. 1918. #1:/California-Professional paper 110/knop0086 ID. Knopf, A. 86 Lakebeds overlain by alluvial deposits northeast of Laws, at Southern Belle mine. Inyo County, California. 1912. Plate 10-A, U.S. Geological Survey, Professional paper 110. 1918. #1:/California-Professional paper 110/knop0087 ID. Knopf, A. 87 Section of alluvial cone in Redding Canyon: Inyo County, California. 1912. Plate 10-B, U.S. Geological Survey, Professional paper 110. 1918. #1:/California-Professional paper 110/knop0090 ID. Knopf, A. 90 Panorama shows details of faulting in basalt plateau southeast of Keeler. Inyo County, California. 1912. Plate 11-B, U.S. Geological Survey, Professional paper 110. 1918. #1:/California-Professional paper 110/knop0091 ID. Knopf, A. 91 Panorama shows details of faulting in basalt plateau southeast of Keeler. Inyo County, California. 1912. Plate 11-B, U.S. Geological Survey, Professional paper 110. 1918. #1:/California-Professional paper 110/knop0094 ID. Knopf, A. 94 Mount Whitney from the mouth of Lone Pine canyon. Tulare County, California. 1912. Plate 16-A, U.S. Geological Survey Professional paper 110. 1918. #1:/California-Professional paper 110/knop0101 ID. Knopf, A. 101 Head of North Fork of Bishop Creek, showing pass to San Joaquin drainage. Inyo County, California. 1912. Plate 22-B, U.S. Geological Survey, Professional paper 110. 1918. #1:/California-Professional paper 110/knop0103 ID. Knopf, A. 103 Cirques at head of South Fork of Bishop Creek: Inyo County, California. 1912. Plate 22-A, U.S. Geological Survey, Professional paper 110. 1918. #1:/California-Professional paper 110/knop0104 ID. Knopf, A. 104 Remnant of sub summit plateau on south fork of Bishop Creek: Inyo County, California. 1912. Plate 20-A, U.S. Geological Survey Professional paper 110. 1918. #1:/California-Professional paper 110/knop0111 ID. Knopf, A. 111 Volcanic field in Owens Valley at the base of the Sierra Nevada, near Goodale Creek: Inyo County, California. July 2, 1913. Plate 12-A U.S. Geological Survey, Professional paper 110. 1918. #1:/California-Professional paper 110/knop0112 ID. Knopf, A. 112 Basaltic ejecta along the base of the Sierra Nevada escarpment, spur between Taboose and Goodale Creeks, Inyo County, California. July 2, 1913. Plate 12-B, U.S. Geological Survey Professional paper 110. 1918. #1:/California-Professional paper 110/knop0113 ID. Knopf, A. 113 Red Mountain. Inyo County, California. 1912. Plate 13-A, U.S. Geological Survey Professional paper 110. 1918. #1:/California-Professional paper 110/knop0119 ID. Knopf, A. 119 Bubbs Canyon, from above Bullfrog trail. Fresno County, California. July 10, 1913. Plate 23-B, U.S. Geological Survey Professional paper 110. 1918. #1:/California-Professional paper 110/knop0123 ID. Knopf, A. 123 Mount Langley (14,042 feet as of 1918), showing a remnant of the summit upland. Inyo County, California. July 1913. Plate 17-A, U.S. Geological Survey Professional paper 110. 1918. #1:/California-Professional paper 110/knop0125 ID. Knopf, A. 125 Remnant of sub summit plateau on spur extending west from Mount Whitney, Sequoia National Park, California. July 24, 1913. Plate 17-B, U.S. Geological Survey Professional paper 110. 1918. #1:/California-Professional paper 110/knop0129 ID. Knopf, A. 129 Plutonic breccias of the Sierra Nevada escarpment: west of Olancha. Inyo County, California. August 3, 1913. Plate 11-C, U.S. Geological Survey, Professional paper 110. 1918. #1:/California-Professional paper 110/knop0131 ID. Knopf, A. 131 Divide at the head of Carthage Creek, from west side. Inyo County, California. August 3, 1913. Plate 20-B, U.S. Geological Survey Professional paper 110. 1918. #1:/California-Professional paper 110/knop0132 ID. Knopf, A. 132 Monachee Meadows, a remnant of the high valley zone, from Deer Mountain. Inyo County, California. August 4, 1913. Plate 19-A, U.S. Geological Survey Professional paper 110. 1918. #1:/California-Professional paper 110/knop0134 ID. Knopf, A. 134 Olancha Peak from the southwest. Inyo County, California. August 4, 1913. Plate 14-B, U.S. Geological Survey Professional paper 110. 1918. #1:/California-Professional paper 110/knop0135 ID. Knopf, A. 135 Even crest of the Sierra Nevada south of Haiwee Pass: Inyo County, California. August 4, 1913. Plate 18-B, U.S. Geological Survey Professional paper 110. 1918. #1:/California-Professional paper 110/knop0137 ID. Knopf, A. 137 Sierra escarpment south of Owens Lake, from Loco siding: Inyo County, California. 1912. Plate 14-A, U.S. Geological Survey Professional paper 110. 1918. #1:/California-Professional paper 110/knop0139 ID. Knopf, A. 139 Fault produced at the time of the Owens valley earthquake of 1872, north end of Alabama Hills: Inyo County, California. August 8, 1913. Plate 15-B, U.S. Geological Survey Professional paper 110. 1918. #1:/California-Professional paper 110/knop0141 ID. Knopf, A. 141 Basalt flow in bottom of Sawmill Canyon: Inyo County, California. August 9, 1913. Plate 23-A, U.S. Geological Survey Professional paper 110. 1918. #1:/California-Professional paper 110/knop0144 ID. Knopf, A. 144 Form a panorama of faulted cinder cone near Fish Springs School, Owens Valley, Inyo County, California. 1912. Plate 13-B, U.S. Geological Survey Professional paper 110. 1918. #1:/California-Professional paper 110/knop0145 ID. Knopf, A. 145 Form a panorama of faulted cinder cone near Fish Springs School, Owens Valley, Inyo County, California. 1912. Plate 13-B, U.S. Geological Survey Professional paper 110. 1918. #1:/California-Professional paper 110/knop0146 ID. Knopf, A. 146 Sierra fault scarp west of Round Valley: Inyo County, California. August 12, 1913. Plate 15-A, U.S. Geological Survey Professional paper 110. 1918. #1:/California-Professional paper 110/knop0148 ID. Knopf, A. 148 Coyote Ridge, from McGee Creek trail. Inyo County, California. August 12, 1913. Plate 19-B, U.S. Geological Survey Professional paper 110. 1918. #1:/California-Professional paper 110/knop0153 ID. Knopf, A. 153 Mount Whitney and the sub summit plateau from Diamond Mesa, Sequoia National Park. California. 1912. Plate 16-C, U.S. Geological Survey Professional paper 110. 1918. #1:/California-Professional paper 110/knop0155 ID. Knopf, A. 155 Mount Whitney from the northwest, Sequoia National Park. California. 1912. Plate 16- B, U.S. Geological Survey Professional paper 110. 1918. #1:/Colorado-Professional paper 168/bwh00057 ID. Bradley, W.H. 57 Microfossil of the oil shale of the Green River formation: Conidia and sporophores resembling Cladosporium. sp. Colorado or Utah. 1925. Plate 20, figure 6, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00061 ID. Bradley, W.H. 61 Microfossil of the oil shale of the Green River formation: Microspora sp. cf. M. pachyderma (Wille) Lagerheim. Colorado or Utah. 1925. Plate 21, figure 7, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00064 ID. Bradley, W.H. 64 Microfossil of the oil shale of the Green River formation: Quadrula minuta Bradley, n.sp. Colorado or Utah. 1925. Plate 25, figure 7, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00065 ID. Bradley, W.H. 65 Microfossil of the oil shale of the Green River formation: Trilobate spinose pollen grain. Colorado or Utah. 1925. Plate 25, figure 3, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00067 ID. Bradley, W.H. 67 Microfossil of the oil shale of the Green River formation: spiral thickening of a tracheid. Colorado or Utah. 1925. Plate 24, figure 5, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00069 ID. Bradley, W.H. 69 Microfossil of the oil shale of the Green River formation: Spores. Colorado or Utah. 1925. Plate 23, figure 1, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00071 ID. Bradley, W.H. 71 Microfossil of the oil shale of the Green River formation: Stellate plant hair? Colorado or Utah. 1925. Plate 24, figure 7, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00073 ID. Bradley, W.H. 73 Microfossil of the oil shale of the Green River formation: Chroococcus? sp. cf. disperus (V. Kessler) Lemmerman. Colorado or Utah. 1925. Plate 19, figure 9, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00075 ID. Bradley, W.H. 75 Microfossil of the oil shale of the Green River formation: spore of Pestalozzia. sp? enlarged 1130 times. Colorado or Utah. 1925. Plate 19, figure 3, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00076 ID. Bradley, W.H. 76 Microfossil of the oil shale of the Green River formation: spores resembling those of Macrosporuim. sp. Colorado or Utah. 1925. Plate 20, figure 9, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00077 ID. Bradley, W.H. 77 Microfossil of the oil shale of the Green River formation: ascospore of Letoshareia sp.? enlarged 1130 times. Colorado or Utah. 1925. Plate 19, figure 2, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00078 ID. Bradley, W.H. 78 Microfossil of the oil shale of the Green River formation: insect eyes and wings. Colorado or Utah. 1927. Plate 27, figure 3, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00079 ID. Bradley, W.H. 79 Microfossil of the oil shale of the Green River formation: group of spores suggesting sorus of Uromyces. sp. Colorado or Utah. 1925. Plate 20, figure 8, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00087 ID. Bradley, W.H. 87 Coarse shale breccia in fairly rich oil shale from Piceance Creek: Rio Blanco County, Colorado. 1925. Plate 16-B, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00089 ID. Bradley, W.H. 89 Salt crystal cavities in a bed of marlstone suggesting interlock plates of anhydrite. Rio Blanco County, Colorado. circa 1925. Plate 6-B, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00090 ID. Bradley, W.H. 90 Calcite mold of radial aggregate of salt crystals found in some of the ellipsoidal cavities shown in bwh00158. Rio Blanco County, Colorado. circa 1925. Plate 6-A, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00100 ID. Bradley, W.H. 100 Microfossil of the oil shale of the Green River formation: Euglypha robusticornis Bradley. n. sp. individual with 5 spines. Colorado or Utah. 1925. Plate 25, figure 10, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00102 ID. Bradley, W.H. 102 Microfossil of the oil shale of the Green River formation: Zygospore, perhaps desmid. Colorado or Utah. 1925. Plate 23, figure 4, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00104 ID. Bradley, W.H. 104 Thin section of a rich oil shale bed from asphalt tunnel, sec. 1, T. 7 S., R. 98 W., showing figured organic material embedded in a structure less groundmass. This photomicrograph shows the spines of insect larvae, probably a species of Oestridae still arranged in tiers. It also shows part of larval skins (the large black areas) and fragments of the eyes and wings of minute adult insects. C.A. Davis thin section was made prior to 1916: enlarged 110 times. Garfield County, Colorado. Plate 18, U.S. Geological Survey. Professional paper 168. 1931. #1:/Utah-Professional paper 168/bwh00141 ID. Bradley, W.H. 141 Lower sandy part of the Bridger formation resting in evident conformity on the Green River formation, approximately in sec. 21, T. 11 S., R. 17: boundary of formation is about one third of the way up from bottom on the left side extending across to a slightly lower position on the right. Duchesne County, Utah. September 6, 1925. Plate 12-B, with graphics, U.S. Geological Survey. Professional paper 168. 1931. #1:/Utah-Professional paper 168/bwh00143 ID. Bradley, W.H. 143 Upper part of Evacuation Creek member in east wall of Evacuation Creek Canyon in sec. 8 T. 10 S., R. 25 E. Salt Lake meridian; shows numerous ellipsoidal cavities formed by the growth of bladed aggregates of an unknown salt while the beds were still plastic. Uintah County, Utah. September 6, 1925. Plate 5-A, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00158 ID. Bradley, W.H. 158 Close view of cavities formed in a rich oil-shale bed by the growth of large radial aggregates of an unknown salt. Note the distortion of the laminae above and below the cavities. Photograph taken on the west side of Piceance Creek, near its mouth. Rio Blanco County, Colorado. July 1925. Plate 5-B, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00159 ID. Bradley, W.H. 159 North down Piceance Creek in T. 1 N., R. 97 W., upper three units of the Parachute Creek member of the Green River formation; lower part of the upper oil-shale group; the transitional beds; the lower oil-shale group; below, the Garden Gulch member. Rio Blanco County. Colorado. July 28, 1925. Plate 4-A, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00160 ID. Bradley, W.H. 160 Contorted bedding due to differential compaction in a bed of oil shale near the mouth of Piceance Creek; Rio Blanco County, Colorado. July 30, 1925. Plate 14-A, U.S. Geological Survey. Professional paper 168. 1931. #1:/Utah-Professional paper 168/bwh00173 ID. Bradley, W.H. 173 Southwest across the valley of Minnie Maud Creek; the remarkably flat bench is the top of the Horse Bench sandstone lentil. The inner canyon of Minnie Maud Creek is cut into the sandy deltaic facies of the Green River formation, and the principal oil-shale group is just below the rim of the inner canyon. The road in the foreground furnishes a scale: Near the boundary between Duchesne and Uintah Counties, Utah. September 9, 1925. Plate 9-B, U.S. Geological Survey. Professional paper 168. 1931. #1:/Utah-Professional paper 168/bwh00177 ID. Bradley, W.H. 177 Steep false bedding in a fine grained muddy sandstone of the delta facies in a small canyon tributary to Minnie Maud Creek; the steepness of the bedding is local and apparently due to differential compaction; near the Duchesne-Uintah County line. Utah. September 11, 1925. Plate 9-A, U.S. Geological Survey. Professional paper 168. 1931. #1:/Utah-Professional paper 168/bwh00178 ID. Bradley, W.H. 178 Large lens of oil shale and organic marlstone in the muddy sandstone of the delta facies of the Green River formation; by differential compaction the top of this lens (upper right) has been depressed several feet below its original position: Near the boundary between Duchesne and Uintah Counties, Utah. September 9, 1925. Plate 10-A, with graphics, U.S. Geological Survey. Professional paper 168. 1931. #1:/Utah-Professional paper 168/bwh00180 ID. Bradley, W.H. 180 Contact between the Bridger and Green River formations in the valley of Evacuation Creek, sec. 12, T. 10 S., R. 24 E., Salt Lake Meridian; this view shows plainly the differential compaction between the shaly marlstone of the Green River formation and the channel sandstone lenses at the base of the Bridger formation. Uintah County, Utah. September 26, 1925. Plate 12-A, with graphics, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00189 ID. Bradley, W.H. 189 Specimen of oil shale breccia, shows a large fragment in the middle, oriented at a small angle with the normal bedding so that it shows its own lamination, which is quite different from that of the rock. Upon the upturned fragment is a patch of Lepidosleus scales. Rio Blanco County, Colorado. August 16, 1925. Plate 16-A, U.S. Geological Survey. Professional paper 168. 1931. #1:/Utah-Professional paper 168/bwh00191 ID. Bradley, W.H. 191 Specimen of mosaic breccia in oil shale showing the contrast on a weathered surface between the flakes of very rich oil shale and the slightly less rich matrix; Uintah County, Utah. September 10, 1925. Plate 15-A, U.S. Geological Survey. Professional paper 168. 1931. #1:/Utah-Professional paper 168/bwh00194 ID. Bradley, W.H. 194 Mud cracked organic marlstone bed from Indian Canyon; small calcite pseudomorphs of a salt, probably glauberite, fill the cracks. Note the marked convexity of the polygon surfaces. Duchesne County, Utah. September 2, 1925. Plate 10-B, U.S. Geological Survey. Professional paper 168. 1931. #1:/Utah-Professional paper 168/bwh00198 ID. Bradley, W.H. 198 Thin bed of fairly rich oil shale, which failed locally under stresses due to differential compaction by distributive thrust faults, other parts of the same bed yielded by folding. Uintah County, Utah. September 14, 1925. Plate 15-B, U.S. Geological Survey. Professional paper 168. 1931. #1:/Utah-Professional paper 168/bwh00203 ID. Bradley, W.H. 203 Bedding plane of brown organic marlstone covered with large Spinose fly larvae, lithohypoderma sp. natural size, from Uintah County, Utah. September 14, 1925. . Plate 2-B, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00264 ID. Bradley, W.H. 264 Microfossil of the oil shale of the Green River formation: Tetraedron sp. cf. T. regulare. var. torsum (Turner) Brunnthaler. Colorado or Utah. 1925. Plate 21, figure 6, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00266 ID. Bradley, W.H. 266 Microfossil of the oil shale of the Green River formation: Phacus sp. cf P. caudate Hubner. Colorado or Utah. 1925. Plate 19, figure 7, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00257 ID. Bradley, W.H. 257 Microfossil of the oil shale of the Green River formation: Spores. Colorado or Utah. 1925. Plate 23, figure 2, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00254 ID. Bradley, W.H. 254 Microfossil of the oil shale of the Green River formation: Spores. Colorado or Utah. 1925. Plate 23, figure 5, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00255 ID. Bradley, W.H. 255 Microfossil of the oil shale of the Green River formation: Spores. Colorado or Utah. 1925. Plate 23, figure 7, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00260 ID. Bradley, W.H. 260 Microfossil of the oil shale of the Green River formation: Spores. Colorado or Utah. 1925. Plate 23, figure 8, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00256 ID. Bradley, W.H. 256 Microfossil of the oil shale of the Green River formation: Group of spores. Colorado or Utah. 1925. Plate 23, figure 9, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00258 ID. Bradley, W.H. 258 Microfossil of the oil shale of the Green River formation: Fern sporangium with annulus. Colorado or Utah. 1925. Plate 23, figure 12, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00259 ID. Bradley, W.H. 259 Microfossil of the oil shale of the Green River formation: Optical section of a fern sporangium. Colorado or Utah. 1925. Plate 23, figure 10, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00261 ID. Bradley, W.H. 261 Microfossil of the oil shale of the Green River formation: Spores. Colorado or Utah. 1925. Plate 23, figure 11, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00267 ID. Bradley, W.H. 267 Microfossil of the oil shale of the Green River formation: Difflugia calcifera Bradley. n. sp. Colorado or Utah. 1925. Plate 25, figure 9, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00269 ID. Bradley, W.H. 269 Microfossil of the oil shale of the Green River formation: Pollen similar to that of Quercus pinus. Colorado or Utah. 1925. Plate 24, figure 4, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00271 ID. Bradley, W.H. 271 Microfossil of the oil shale of the Green River formation: Malvaceae type of pollen. Colorado or Utah. 1925. Plate 25, figure 5, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00272 ID. Bradley, W.H. 272 Microfossil of the oil shale of the Green River formation: Triangular pollen with very large apertures. Colorado or Utah. 1925. Plate 25, figure 2, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00273 ID. Bradley, W.H. 273 Microfossil of the oil shale of the Green River formation: tupelo type of pollen. Colorado or Utah. 1925. Plate 25, figure 7, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00274 ID. Bradley, W.H. 274 Microfossil of the oil shale of the Green River formation: Citrus type of pollen. Colorado or Utah. 1925. Plate 25, figure 6, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00276 ID. Bradley, W.H. 276 Microfossil of the oil shale of the Green River formation: spore similar to the conidia of Brachysporium sp. Colorado or Utah. 1925. Plate 20, figure 7, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00278 ID. Bradley, W.H. 278 Microfossil of the oil shale of the Green River formation: Chain of conidia resembling those of several genera of Hyphomycetes. Colorado or Utah. 1925. Plate 20, figure 2, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00281 ID. Bradley, W.H. 281 Microfossil of the oil shale of the Green River formation: Pollen similar to that of the Umbelliferae. Colorado or Utah. 1925. Plate 25, figure 1, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00286 ID. Bradley, W.H. 286 Microfossil of the oil shale of the Green River formation: Magnolia type of pollen. Colorado or Utah. 1925. Plate 25, figure 4, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00299 ID. Bradley, W.H. 299 Thin section of a rich oil shale showing several relatively large concretions and an abundance of minute concretions, all of micro granular carbonates; enlarged 10 times. Rio Blanco County, Colorado. July 27, 1925. Plate 17-A, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00305 ID. Bradley, W.H. 305 Microfossil of the oil shale of the Green River formation: Pollen similar to that of Thuja. Colorado or Utah. 1925. Plate 24, figure 3, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00328 ID. Bradley, W.H. 328 Microfossil of the oil shale of the Green River formation: larva of lithohypoderma sp. Colorado or Utah. 1927. Plate 28, figure 5, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00532 ID. Bradley, W.H. 532 Microfossil of the oil shale of the Green River formation: larva of Chironomidae. Colorado or Utah. 1927. Plate 28, figure 1 and 3, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00533 ID. Bradley, W.H. 533 Microfossil of the oil shale of the Green River formation: larva of syrphidae. Colorado or Utah. 1927. Plate 28, figure 4, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/bwh00534 ID. Bradley, W.H. 534 Microfossil of the oil shale of the Green River formation: larva of Tabanidae. Colorado or Utah. 1927. Plate 28, figure 1, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/dca00001 ID. Davis, C.A. 1 Microfossil of the oil shale of the Green River formation: spores resembling those of Trichothecium, Mycosphaerella, and didymella. Colorado or Utah. 1914. Plate 20, figure 1, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/dca00003 ID. Davis, C.A. 3 Microfossil of the oil shale of the Green River formation: Eoglobella longipes Bradley. n. gen. and sp. Colorado or Utah. 1914. Plate 22, figure 3, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/dca00014 ID. Davis, C.A. 14 Microfossil of the oil shale of the Green River formation: Euglypha robusticornis Bradley, n. sp. individual with 4 spines. Colorado or Utah. 1914. Plate 25, figure 11, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/dca00016 ID. Davis, C.A. 16 Microfossil of the oil shale of the Green River formation: hapalosiphon sp. cf. H. confervaceous Borzi. Colorado or Utah. 1914. Plate 21, figure 3, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/dca00020 ID. Davis, C.A. 20 Microfossil of the oil shale of the Green River formation: Crinalium? sp. cf. C. endophyticum Crow. Colorado or Utah. 1914. Plate 21, figure 1, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/dca00022 ID. Davis, C.A. 22 Microfossil of the oil shale of the Green River formation: hapalosiphon sp. cf. H. confervaceous Borzi. Colorado or Utah. 1914. Plate 21, figure 2, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/dca00028 ID. Davis, C.A. 28 Microfossil of the oil shale of the Green River formation: spores resembling those of Helminthosporium Colorado or Utah. 1914. Plate 20, figure 3, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/dca00031 ID. Davis, C.A. 31 Microfossil of the oil shale of the Green River formation: chains of conidia suggesting those of Torula Colorado or Utah. 1914. Plate 20, figure 5, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/dca00032 ID. Davis, C.A. 32 Microfossil of the oil shale of the Green River formation: Chroococcus? sp. cf. C. westi (W. West) P. Boye. Colorado or Utah. 1915. Plate 19, figure 8, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/dca00038 ID. Davis, C.A. 38 Microfossil of the oil shale of the Green River formation: Crinalium? sp. Colorado or Utah. 1915. Plate 19, figure 10, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/dca00043 ID. Davis, C.A. 43 Microfossil of the oil shale of the Green River formation: a member of the Protocococcaceae, cf. Eremosphaera De Bary. Colorado or Utah. 1915. Plate 21, figure 4, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/dca00047 ID. Davis, C.A. 47 Microfossil of the oil shale of the Green River formation: pollen of pinus. Colorado or Utah. 1915. Plate 24, figure 6, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/dca00049 ID. Davis, C.A. 49 Microfossil of the oil shale of the Green River formation: germinating spore suggestive of Hendersonia sp. Colorado or Utah. 1915. Plate 20, figure 4, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/dca00061 ID. Davis, C.A. 61 Microfossil of the oil shale of the Green River formation: Coelastrum? sp. cf; C. verrucosum Reinsh. Colorado or Utah. 1915. Plate 21, figure 5, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/dca00068 ID. Davis, C.A. 68 Microfossil of the oil shale of the Green River formation: large bacillus? Colorado or Utah. 1915. Plate 19, figure 1, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/dca00070 ID. Davis, C.A. 70 Microfossil of the oil shale of the Green River formation: Trichobacteria? Colorado or Utah. 1915. Plate 19, figure 4, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/dca00075 ID. Davis, C.A. 75 Microfossil of the oil shale of the Green River formation: Peristome tooth? of one of the Bryales. Colorado or Utah. 1915. Plate 24, figure 1, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/dca00082 ID. Davis, C.A. 82 Microfossil of the oil shale of the Green River formation: stiff, bristle like hairs of an insect. Colorado or Utah. 1915. Plate 28, figure 6, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/dca00084 ID. Davis, C.A. 84 Microfossil of the oil shale of the Green River formation: alga, possibly related to Vaucheria De. Candolle. Colorado or Utah. 1915. Plate 23, figure 3, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/dca00090 ID. Davis, C.A. 90 Microfossil of the oil shale of the Green River formation: plumose appendages of insects. Colorado or Utah. 1915. Plate 28, figure 7, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/dca00109 ID. Davis, C.A. 109 Microfossil of the oil shale of the Green River formation: a predaceous mite belonging to the chelytidae. Colorado or Utah. 1915. Plate 26, figure 1 and 2 (which is an enlargement of part of this photo, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/dca00119 ID. Davis, C.A. 119 Microfossil of the oil shale of the Green River formation: transverse section of bark. Colorado or Utah. 1914. Plate 24, figure 2, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/dca00129 ID. Davis, C.A. 129 Microfossil of the oil shale of the Green River formation: alga with some of the vegetative characters of the Siphonales. Colorado or Utah. 1915. Plate 22, figure 4, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/dca00138 ID. Davis, C.A. 138 Microfossil of the oil shale of the Green River formation: eyes of a minute adult insect. Colorado or Utah. 1915. Plate 27, figure 1, U.S. Geological Survey. Professional paper 168. 1931. Part of plate 7-B, U.S. Geological Survey. Bulletin 729. #1:/Colorado-Professional paper 168/dca00140 ID. Davis, C.A. 140 Microfossil of the oil shale of the Green River formation: large tetrahedral spore. Colorado or Utah. 1915. Plate 23, figure 6, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/dca00151 ID. Davis, C.A. 151 Microfossil of the oil shale of the Green River formation: Stigeoclonium? sp. cf. S. lubricum (Dillwyn) Kutzing. Colorado or Utah. 1915. Plate 22, figure 1, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/dca00164 ID. Davis, C.A. 164 Microfossil of the oil shale of the Green River formation: chain of conidia? similar to those Bispora. Colorado or Utah. 1915. Plate 19, figure 6, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/dca00168 ID. Davis, C.A. 168 Microfossil of the oil shale of the Green River formation: alga, probably one of the Chroococcaaceae. Colorado or Utah. 1915. Plate 22, figure 2, U.S. Geological Survey. Professional paper 168. 1931. #1:/Colorado-Professional paper 168/winc0398 ID. Winchester, D.E. 398 Papery oil shale, showing flexibility: Uintah County, Utah. 1916. Plate 25-C in U.S. Geological Survey. Professional paper 132. 1925. Plate 4-B in U.S. Geological Survey. Professional paper 168. 1931. Plate 10-B in U.S. Geological Survey. Bulletin 691. 1919. Plate 5-B in U.S. Geological Survey. Bulletin 729. 1923. #1:/Colorado-Professional paper 168/winc0557 ID. Winchester, D.E. 557 Up a small tributary of Clear Creek; shows the typical cliffs made by the principal oil- shale group of the Parachute Creek member of the Green River formation. The photograph was taken approximately from the horizon of the "mahogany ledge". Garfield County, Colorado. 1917. Plate 2-A, U.S. Geological Survey. Professional paper 168. 1931. #1:/Utah-Professional paper 177/ntb00001 ID. Nolan, T.B. 1 Bonneville Beach and spit, East of Dutch Mountain. Toole County, Utah. circa 1926. Plate 4-A. U.S.Geological Survey Professional Paper 177. 1935. #1:/Utah-Professional paper 177/ntb00004 ID. Nolan, T.B. 4 Dutch Mountain from the southeast. Toole County, Utah. circa 1926. Plate 4-B, U.S.Geological Survey Professional Paper 177. 1935. #1:/Utah-Professional paper 177/ntb00007 ID. Nolan, T.B. 7 Clifton Flat from the southwest. Plate 4-C, U.S.Geological Survey Professional Paper 177. 1935. #1:/Utah-Professional paper 177/ntb00008 ID. Nolan, T.B. 8 Rocks of Gold Hill quadrangle: Chert-pebble conglomerate with oolitic matrix from Oquirrh formation. Toole County, Utah. circa 1926. Plate 5-F, U.S.Geological Survey Professional Paper 177. 1935. #1:/Utah-Professional paper 177/ntb00009 ID. Nolan, T.B. 9 East Slope of Ochre Mountain. Photo by F.A. Melton. Toole County, Utah. circa 1926. Plate 6-A, U.S.Geological Survey Professional Paper 177. 1935. #1:/Utah-Professional paper 177/ntb00010 ID. Nolan, T.B. 10 Dissected post mature erosion surface: looking southeast from a point near U.S. locating monument 11. Photo by F.A. Melton. Toole County, Utah. circa 1926. Plate 6-C, U.S.Geological Survey Professional Paper 177. 1935. #1:/Utah-Professional paper 177/ntb00011 ID. Nolan, T.B. 11 Dissected post mature erosion surface: looking east from a point near the Yellow Hammer mine. Photo by F.A. Melton. Toole County, Utah. circa 1926. Plate 6-D, U.S.Geological Survey Professional Paper 177. 1935. #1:/Utah-Professional paper 177/ntb00012 ID. Nolan, T.B. 12 Crumpling beneath nearly flat fault on west side of Ochre Mountain. Toole County, Utah. circa 1926. Plate 7-A, U.S.Geological Survey Professional Paper 177. 1935. #1:/Utah-Professional paper 177/ntb00013 ID. Nolan, T.B. 13 Plunging minor anticline in the Manning Canyon formation. Toole County, Utah. circa 1926. Plate 7-B, U.S.Geological Survey Professional Paper 177. 1935. #1:/Utah-Professional paper 177/ntb00014 ID. Nolan, T.B. 14 Variable dip of fault between the Madison limestone and the Woodman formation in Accident Canyon. Toole County, Utah. circa 1926. Plate 7-C, U.S.Geological Survey Professional Paper 177. 1935. #1:/Utah-Professional paper 177/ntb00015 ID. Nolan, T.B. 15 Minor thrust in the Woodman formation north of the Garrison Monster New Camp. Toole County, Utah. circa 1926. Plate 7-D, U.S.Geological Survey Professional Paper 177. 1935. #1:/Utah-Professional paper 177/ntb00018 ID. Nolan, T.B. 18 Photomicrograph: Preservation of calcite cleavage lines in jasperoid: enlarged 87 times Toole County, Utah. circa 1926. Plate 8-D, U.S.Geological Survey Professional Paper 177. 1935. #1:/Utah-Professional paper 177/ntb00019 ID. Nolan, T.B. 19 Elongated quartz grains in silicified quartz monzonite, showing tendency toward parallel orientation. Crossed nicols. Toole County, Utah. circa 1926. Plate 9-A, U.S.Geological Survey Professional Paper 177. 1935. #1:/Utah-Professional paper 177/ntb00020 ID. Nolan, T.B. 20 Successive replacements in a specimen from the tungsten-bearing pipe on the Reaper Claim. (e) Epidote; (d) diopside; (a) amphibole; (ap) apatite; (c) calcite. Toole County, Utah. circa 1926. Plate 9-B, U.S.Geological Survey Professional Paper 177. 1935. #1:/Utah-Professional paper 177/ntb00021 ID. Nolan, T.B. 21 Apatite (ap) and molybdenite (m) in amphibole, from Reaper Claim. Toole County, Utah. circa 1926. Plate 9-C, U.S.Geological Survey Professional Paper 177. 1935. #1:/Utah-Professional paper 177/ntb00022 ID. Nolan, T.B. 22 Rocks of Gold Hill quadrangle: Pisolitic dolomite from the Hicks formation. Toole County, Utah. circa 1926. Plate 5-C, U.S.Geological Survey Professional Paper 177. 1935. #1:/Utah-Professional paper 177/ntb0022a ID. Nolan, T.B. 22a Photomicrograph: Quartz (q) and orthoclase (o) replacing calcite (c), Wilson Consolidated Mine. (Plain light). enlarged 87 times. Toole County, Utah. circa 1926. Plate 10-D, U.S.Geological Survey Professional Paper 177. 1935. #1:/Utah-Professional paper 177/ntb00023 ID. Nolan, T.B. 23 Photomicrograph: Polished section showing arsenopyrite fragments cemented by quartz and other sulphides, enlarged 100 times. Cyclone Mine. Toole County, Utah. circa 1926. Plate 10-E, U.S.Geological Survey Professional Paper 177. 1935. #1:/Utah-Professional paper 177/ntb00024 ID. Nolan, T.B. 24 Polished section showing brecciated arsenopyrite (FeAsS), veined by pyrite (py), quartz (q), sphaletite (s) and galena (g), U.S. Mine. enlarged 100 times. Toole County, Utah. circa 1926. Plate 11-B, U.S.Geological Survey Professional Paper 177. 1935. #1:/Utah-Professional paper 177/ntb00025 ID. Nolan, T.B. 25 Polished section showing replacement of arsenopyrite fragments by quartz and sercicite enlarged 100 times Western Utah Mine. Toole County, Utah. circa 1926. Plate 11-C, U.S.Geological Survey Professional Paper 177. 1935. #1:/Utah-Professional paper 177/ntb00026 ID. Nolan, T.B. 26 Thin section showing replacement of arsenopyrite fragments by quartz and sercicite, Western Utah Mine. Toole County, Utah. circa 1926. Plate 11-D, U.S.Geological Survey Professional Paper 177. 1935. #1:/Utah-Professional paper 177/ntb00027 ID. Nolan, T.B. 27 Photomicrograph: Crystalline scorodite forming from metacolloid. (Plain light). enlarged 28 times. Toole County, Utah. circa 1926. Plate 12-C, U.S.Geological Survey Professional Paper 177. 1935. #1:/Colorado-Professional paper 183/lwt02936 ID. Lee, W.T. 2936 Cross-bedded Wingate sandstone at the east end of Unaweep Canyon, about 10 miles west of Whitewater; Wingate rests conformably on shale of the Chinle formation exposed at base of cliff. Mesa County, Colorado. 1925. Plate 6-A, in U.S. Geological Survey. Professional paper 183. 1936. #1:/Arizona-Professional paper 183/lwt03216 ID. Lee, W.T. 3216 Typical exposure of the Wingate sandstone in a cliff near Kayenta, note the indefinite contact between the Wingate sandstone and the underlying Chinle formation, the sheer wall of sandstone characterized by vertical jointing and alcoves, and the Kayenta formation in the upper part of the cliff. Navajo County, Arizona. Pre-1926. Plate 5-C, in U.S. Geological Survey. Professional paper 183. 1936. #1:/Utah-Professional paper 183/ece00326 ID. Erdmann, C.E. 326 Wingate sandstone and underlying softer Chinle shale exposed at Big Hole on the Colorado River 8 miles east of Cisco, note the extensive horizontal softer beds in the Wingate sandstone and the cross-bedding within the thicker sandstone beds. sec. 8 T. 21 S., R. 23 E. Grand County, Utah. October 1927. Plate 6-B, in U.S. Geological Survey. Professional paper 183. 1936. Plate 9-A, in U.S. Geological Survey. Bulletin 863, 1935. #1:/Utah-Professional paper 183/ece00338 ID. Erdmann, C.E. 338 Sandstone ledges and slopes of the lower part of the Kayenta formation at Big Hole, on the Colorado River 8 miles east of Cisco. The top of the cliff formed by the Wingate sandstone is shown toward the left at the bottom of the picture. Grand County, Utah. November 1927. Plate 8-A, in U.S. Geological Survey. Professional paper 183. Plate 10-B, in U.S. Geological Survey. Bulletin 863, 1935. #1:/Utah-Professional paper 183/baa00285 ID. Baker, A.A. 285 Intraformational unconformity about 50 feet below the top of the Kayenta formation on the east side of Cottonwood Canyon; sec. 2 T. 32 S., R. 21 E., photo by L.W. Clark, San Juan County, Utah. 1927. Plate 8-B, in U.S. Geological Survey. Professional paper 183. 1936. #1:/Utah-Professional paper 183/baa00151 ID. Baker, A.A. 151 Indefinite contact between the Kayenta formation and the overlying Navajo sandstone, on the west bank of the Colorado River at the mouth of Nigger Bill (now Negro Bill) Creek, in sec. 19, T. 25 S., R. 22 E. Grand County, Utah. 1926. Plate 8-C, in U.S. Geological Survey. Professional paper 183. 1936. #1:/Utah-Professional paper 183/baa00518 ID. Baker, A.A. 518 A thin lens of limestone near the top of the Navajo sandstone in the Green River desert; locality 3 miles northeast of the junction of the Spur and Trail Spring Forks of the Horseshoe Canyon. The Carmel formation crops out on the broad bench and the Entrada sandstone forms of the cliffs in the background. Wayne County, Utah. 1931. Plate 11-A, in U.S. Geological Survey. Professional paper 183. 1936. #1:/Utah-Professional paper 183/lwt01381 ID. Lee, W.T. 1381 Navajo sandstone in Zion Canyon, the lighter colored sandstone forming the upper one- third of the cliff as formerly designated the "Colob sandstone", and the darker sandstone forming the lower two-thirds of the cliff was formerly designated the "Kanab sandstone." The Carmel formation caps the cliff and the Chinle formation crops out near stream level. Zion National Park. Utah. Pre-1926. Plate 11-B, U.S. Geological Survey. Professional paper 183. 1936. #1:/Utah-Professional paper 183/baa00175 ID. Baker, A.A. 175 Water laid bed of nodular weathering silty red sandstone near the top of the Navajo sandstone; locality is 15 miles southeast of Moab, at the southeast corner of sec. 11, T. 28 S., R. 22 E. San Juan County, Utah. 1926. Plate 15-A, U.S. Geological Survey. Professional paper 183. 1936. #1:/Utah-Professional paper 183/baa00499 ID. Baker, A.A. 499 Outcrop of the Carmel formation in a fork of Moonshine Canyon in sec. 20, T. 24 S., R. 16 E., Green River desert; the tanks in foreground rest on the Navajo sandstone, which is overlain by the limy sandstone beds at the base of the Carmel formation. Gypsiferous shale and sandstone beds of the Carmel formation form the upper part of the canyon wall. Emery County, Utah. 1930. Plate 15-B, U.S. Geological Survey. Professional paper 183. 1936. #1:/Utah-Professional paper 183/lwt02966 ID. Lee, W.T. 2966 Tangential cross-bedding in the upper part of the Navajo sandstone in Dry Valley, sec. 9, T. 30 S., R.23 E., 26 miles north of Monticello. San Juan County, Utah. 1925. Plate 15- C, in U.S. Geological Survey. Professional paper 183. 1936. #1:/Utah-Professional paper 183/baa00471 ID. Baker, A.A. 471 Ledge of massive sandstone in the Carmel formation bout 150 feet above the base: on the Paria River 6 miles below Cannonville. Kane County, Utah. 1930. Plate 16-A, in U.S. Geological Survey. Professional paper 183. 1936. #1:/Utah-Professional paper 183/baa00502 ID. Baker, A.A. 502 Irregular contact between the Carmel formation and overlying Entrada sandstone, on the San Rafael River in sec. 14, T. 24 S., R. 15 E. Emery County, Utah. 1930. Plate 16-B, in U.S. Geological Survey. Professional paper 183. 1936. #1:/Utah-Professional paper 183/baa00509 ID. Baker, A.A. 509 Irregular bedding in the massive Entrada sandstone, about 8 miles east of Flattop Buttes in the Green River desert. Emery County, Utah. 1931. Plate 17-A, in U.S. Geological Survey. Professional paper 183. 1936. #1:/Utah-Professional paper 183/baa00490 ID. Baker, A.A. 490 Solution pits in the Entrada sandstone about 1 mile southeast of Cane Springs, the Moab sandstone member at the top of the Entrada sandstone is overlain by the Summerville formation and Morrison formation. San Juan County, Utah. 1930. Plate 17-C, with graphics, in U.S. Geological Survey. Professional paper 183. 1936. #1:/Colorado- Professional paper 183/lwt03011 ID. Lee, W.T. 3011 Canyon of the Dolores River west of Bedrock; Wingate sandstone; Kayenta formation; Navajo sandstone; Entrada sandstone; Morrison formation. Montrose County, Colorado 1925. Plate 18-B, in U.S. Geological Survey. Professional paper 183. 1936. #1:/Colorado- Professional paper 183/dch00390 ID. Dane, C.H. 390 West wall of the canyon of Dolores River at Gateway; Chinle formation; Wingate sandstone; Kayenta formation; Entrada sandstone; Morrison formation. Rocks of Carboniferous age underlie the Chinle formation and crop out in the lower part of the canyon wall. Mesa County, Colorado August 1929. Plate 18-C, with graphics, in U.S. Geological Survey. Professional paper 183. 1936. #1:/Utah-Professional paper 183/ece00341 ID. Erdmann, C.E. 341 Intricate cross bedding in the Entrada sandstone, in the northern part of sec. 5, T. 21 S., R. 23 E., about 8 miles northeast of Cisco; the white sandstone at the top is the lower part of the Moab sandstone member. Grand County, Utah. November 1927. Plate 18-D, in U.S. Geological Survey. Professional paper 183. Plate 14-A, in U.S. Geological Survey. Bulletin 863, 1935. #1:/Utah-Professional paper 183/lwt03171 ID. Lee, W.T. 3171 Entrada sandstone and lower part of the Morrison formation near the mouth of Cottonwood Wash, Bluff; the low ledge in the foreground represents the complete thickness of the Entrada sandstone near the southern limit of the formation. The slope forming beds and the massive ledge of sandstone ("Bluff sandstone") make up the lower part of the Morrison formation. San Juan County, Utah. 1925. Plate 19-A, in U.S. Geological Survey. Professional paper 183. 1936. #1:/Utah-Professional paper 183/baa00275 ID. Baker, A.A. 275 Masses of chert weathered from the Summerville formation on Hatch Rock, sec. 1, T. 30 S. R. 22 E., photo by L.W. Clark. San Juan County, Utah. 1927. Plate 22-D, U.S.Geological Survey Professional Paper 183. 1936. #1:/New Mexico-Professional paper 183/baa00329 ID. Baker, A.A. 329 Morrison formation at Navajo Church, shows the banded sandstone in the lower part of the Morrison formation resting upon the Todilto limestone member, which overlies the Wingate sandstone. McKinley County, New Mexico. 1928. Plate 25-A, U.S.Geological Survey Professional Paper 183. 1936. #1:/New Mexico-Professional paper 183/baa00330 ID. Baker, A.A. 330 Navajo Church, shows the cross-bedded sandstone in the upper part of the Morrison formation. McKinley County, New Mexico. 1928. Plate 25-B, U.S.Geological Survey Professional Paper 183. 1936. #1:/New Mexico-Professional paper 183/baa00333 ID. Baker, A.A. 333 Outcrop of the Todilto limestone member of the Morrison formation; about 4 miles north of the Atchison, Topeka & Santa Fe Railway, at Bluewater (a flag station), McKinley County, New Mexico. 1928. Plate 23-B, U.S.Geological Survey Professional Paper 183. 1936. #1:/Utah-Professional paper 183/baa00493 ID. Baker, A.A. 493 Banded shale in the upper part of the Morrison formation, 13 miles southwest of Green River, along the road from Green River to Hanksville. The ledge at the top of the slope is formed by a bed of siliceous sandstone near the top of the formation. Emery County, Utah. 1930. Plate 23-C, U.S.Geological Survey Professional Paper 183. 1936. #1:/New Mexico-Professional paper 183/dnh01309 ID. Darton, N.H. 1309 Wingate sandstone overlain by gypsum at the base of the Morrison formation on the bank of the Gallina River, 30 miles northwest of Abiquiu; the wood slope is Morrison shale. Rio Arriba County, New Mexico. circa 1917. Plate 24-A, in U.S. Geological Survey. Professional paper 183. 1936. Plate 39-B, in U.S. Geological Survey. Bulletin 794. 1928. #1:/New Mexico-Professional paper 183/dnh01313 ID. Darton, N.H. 1313 Todilto limestone member of the Morrison and the associated gypsum along the Atchison, Topeka and Santa Fe Railway at El Rito, above the gypsum are sandy shales and sandstone of the Morrison formation; Todilto limestone member of the Morrison formation; gypsum overlying the Todilto limestone. Valencia County, New Mexico. circa 1917. Plate 24-B, with graphics, in U.S. Geological Survey. Professional paper 183. 1936. Plate 27, in U.S. Geological Survey. Bulletin 794. 1928. #1:/Arizona- Professional paper 183/lwt03245 ID. Lee, W.T. 3245 Bedded sandstones of the Morrison formation resting upon the massive Wingate sandstone near Lupton, Apache County, Arizona. 1925. Plate 25-D, in U.S. Geological Survey. Professional paper 183. 1936. #1:/Utah-Professional paper 183/lwt03078 ID. Lee, W.T. 3078 East wall of the north end of the Salt Valley about 7 miles south-southwest of Thompson; the valley flat in the foreground is largely underlain by the Upper Cretaceous Mancos shale, dropped against the Jurassic formations of the valley walls by a large fault. Morrison formation; Salt Wash sandstone member of the Morrison; Summerville formation; Entrada sandstone; Moab sandstone tongue of the Entrada; Carmel formation; Navajo sandstone; Kayenta sandstone; Wingate sandstone. Grand County, Utah. 1925. Plate 26-A, in U.S. Geological Survey. Professional paper 183. 1936. Plate 5 in U.S. Geological Survey. Bulletin 863. 1935. #1:/New Mexico-Professional paper 183/sjd00210 ID. Sears, J.D. 210 Cross-bedding in the Wingate sandstone near Navajo Church. McKinley County, New Mexico. 1929. Plate 7-C, in U.S. Geological Survey. Professional paper 183. 1936. #1:/California-Professional paper 172/fhg00753 ID. Ferguson, H.G. 753 Typical exposure of serpentine, nearly bare of vegetation, valley of Kanaka Creek: Sierra County, California. 1924. Plate 5-B, U.S.Geological Survey Professional Paper 172. 1932. #1:/California-Professional paper 172/fhg00755 ID. Ferguson, H.G. 755 Footwall of vein marked by curving post-mineral fault, Plumbago mine, raise above No. 4 level. The post-mineral movement probably followed an earlier break, for the banding in the quartz (right) is nearly parallel to the fault. Sierra County, California. 1924. Plate 16-A, in U.S.Geological Survey Professional Paper 172. 1932. #1:/California-Professional paper 172/fhg00756 ID. Ferguson, H.G. 756 Vein with well-marked walls, Plumbago mine, No. 4 level; country rock outside of walls is massive and unsheared. Material between the walls consists of sheared and altered rock with lenses of quartz. Left-hand mass of quartz is crushed and broken by later faulting, on right is roughly banded following an older fault. Sierra County, California. 1924. Plate 15-A, in U.S.Geological Survey Professional Paper 172. 1932. #1:/California-Professional paper 172/fhg00760 ID. Ferguson, H.G. 760 Fault plane in quartz passing from footwall to hanging wall, Sixteen to One mine, 800- foot level. Vein is here in the unusual condition that neither wall is formed by a fault and stringers extend out into both foot and hanging walls. The straight boundary along a small part of the footwall (to the right of the center) may be due to a fault prior to the introduction of the quartz, since it does not cut the quartz. Sierra County, California. 1924. Plate 16-B, in U.S.Geological Survey Professional Paper 172. 1932. #1:/California-Professional paper 172/fhg00761 ID. Ferguson, H.G. 761 Wedge of quartz in country rock, bounded by faults, Oriental mine, shaft below level 10; major hanging wall fault (on the right) cuts of the minor steep fault. Sierra County, California. 1924. Plate 17-B, in U.S.Geological Survey Professional Paper 172. 1932. #1:/California-Professional paper 172/fhg00767 ID. Ferguson, H.G. 767 Eocene gravel at old hydraulic workings south of Allegany: Sierra County, California. 1924. Plate 5-C, U.S.Geological Survey Professional Paper 172. 1932. #1:/California-Professional paper 172/fhg00765 ID. Ferguson, H.G. 765 From Alleghany, looking down valley of Kanaka Creek. Sierra County, California. 1924. Plate 2-D, in U.S.Geological Survey Professional Paper 172. 1932. #1:/California-Professional paper 172/fhg00769 ID. Ferguson, H.G. 769 Hornblende schist with streaks of quartz, Tightner formation, near lower Osceola Tunnel: Sierra County, California. 1924. Plate 4-A, in U.S.Geological Survey Professional Paper 172. 1932. #1:/California-Professional paper 172/fhg00770 ID. Ferguson, H.G. 770 Crumpled hornblende schist of Tightner formation between Morning Glory and Osceola mines. Sierra County, California. 1924. Plate 2-A, in U.S.Geological Survey Professional Paper 172. 1932. #1:/California-Professional paper 172/fhg00771 ID. Ferguson, H.G. 771 Basal conglomerate (tillite) of Kanaka formation near transformer house, Alleghany; Sierra County, California. 1924. Plate 4-B, in U.S.Geological Survey Professional Paper 172. 1932. #1:/California-Professional paper 172/fhg00773 ID. Ferguson, H.G. 773 Relief quartz, fold in quartzitic slate, Kanaka Creek, Rapps Ravine. Sierra County, California. 1924. Plate 5-A, U.S.Geological Survey Professional Paper 172. 1932. #1:/California-Professional paper 172/fhg00774 ID. Ferguson, H.G. 774 Slate of the Blue Canyon formation near Mammoth Springs mine. Sierra County, California. 1924. Plate 2-B in U.S.Geological Survey Professional Paper 172. 1932. #1:/California-Professional paper 172/fhg00777 ID. Ferguson, H.G. 777 Outcrop of vein in footwall side of Sixteen to One vein, in road cut near mine office. Drag of slates on hanging wall side indicates reverse movement. Sierra County, California. 1924. Plate 7-B, in U.S.Geological Survey Professional Paper 172. 1932. #1:/California-Professional paper 172/fhg00779 ID. Ferguson, H.G. 779 Lenses of quartz in crushed slate along wall of Clinton vein, Rainbow mine. Sierra County, California. 1924. Plate 13-B, in U.S.Geological Survey Professional Paper 172. 1932. #1:/California-Professional paper 172/fhg00780 ID. Ferguson, H.G. 780 Transverse quartz stringers in carbonatized slate close to main vein, Rainbow mine, adit level; light colored streaks and patches in the wall rock are chiefly carbonate. Sierra County, California. 1924. Plate 13-A, in U.S.Geological Survey Professional Paper 172. 1932. #1:/California-Professional paper 172/fhg00783 ID. Ferguson, H.G. 783 Banding in vein due to shearing, which has taken place chiefly along septa of country rock, Sixteen to One mine. Sierra County, California. 1924. Plate 11-D, in U.S.Geological Survey Professional Paper 172. 1932. #1:/California-Professional paper 172/fhg00784 ID. Ferguson, H.G. 784 Flows of Pleistocene basalt capping Miocene andesitic breccia Bald Mountain: part of town of Forest in foreground. Sierra County, California. 1924. Plate 5-D, U.S.Geological Survey Professional Paper 172. 1932. #1:/California-Professional paper 172/fhg00754 ID. Ferguson, H.G. 754 North side of valley of Kanaka Creek, looking toward Sixteen to One mill showing shoulder below lava. Sierra County, California. 1924. Plate 7-A, in U.S.Geological Survey Professional Paper 172. 1932. #1:/California-Professional paper 172/fhg00787 ID. Ferguson, H.G. 787 Quartz stringers cutting Cape Horn slate, Brush Creek mine, winze in hanging wall. Sierra County, California. 1924. Plate 13-D, in U.S.Geological Survey Professional Paper 172. 1932. #1:/California-Professional paper 172/fhg00790 ID. Ferguson, H.G. 790 Ribbon quartz cut by transverse sheeting, Kate Hardy mine, adit level. Sierra County, California. 1924. Plate 18-C, in U.S.Geological Survey Professional Paper 172. 1932. #1:/California-Professional paper 172/fhg00793 ID. Ferguson, H.G. 793 Vein with lower strand showing crinkly banding and strand above containing fragments of altered wall rock, Eldorado mine, adit level. Along hanging wall in right hand upper corner is breccia containing quartz fragments in a matrix of carbonate and mariposite. Sierra County, California. 1924. Plate 19-B, in U.S.Geological Survey Professional Paper 172. 1932 #1:/California-Professional paper 172/fhg00794 ID. Ferguson, H.G. 794 Quartz displace by minor fault that does not cut the footwall, Eldorado mine, upper tunnel on bullion vine. Sierra County, California. 1924. Plate 17-A, in U.S.Geological Survey Professional Paper 172. 1932. #1:/California-Professional paper 172/fhg00795 ID. Ferguson, H.G. 795 Breccia containing quartz, cemented by fine-grained quartz, Eldorado mine, adit level; breccia lies along hanging wall of vein but extends down into the vein along small fissures. Sierra County, California. 1924. Plate 14-A, in U.S.Geological Survey Professional Paper 172. 1932. #1:/California-Professional paper 172/fhg00788 ID. Ferguson, H.G. 788 Lenses of quartz and carbonate in crushed slate, Kate Hardy mine, adit level, crosscut into hanging wall near shaft. Later movement is shown by fault planes at point of the pick and along the hanging wall. Sierra County, California. 1924. Plate 13-C, in U.S.Geological Survey Professional Paper 172. 1932. #1:/California-Professional paper 172/fhg00789 ID. Ferguson, H.G. 789 "Crossover" stringers between hanging wall and footwall Kate Hardy mine, lowest level; walls are nearly vertical. Sierra County, California. 1924. Plate 12-B, in U.S.Geological Survey Professional Paper 172. 1932. #1:/California-Professional paper 172/fhg00792 ID. Ferguson, H.G. 792 Quartz stringers in footwall of vein, Eldorado mine, near bottom of shaft; stringers are parallel and at angles to the vein but cross the vertical cleavage of the country rock. Hanging wall marked by later shear. Sierra County, California. 1924. Plate 12-A, in U.S.Geological Survey Professional Paper 172. 1932. #1:/California-Professional paper 172/fhg00798 ID. Ferguson, H.G. 798 Altered but unsheared country rock separating quartz strands, Rainbow mine, main vein, adit level. Sierra County, California. 1924. Plate 11-C, in U.S.Geological Survey Professional Paper 172. 1932. #1:/California-Professional paper 172/fhg00799 ID. Ferguson, H.G. 799 Vein in sharp footwall due to faulting and frozen hanging wall with quartz stringers: Plumbago mine, no. 4 level. Sierra County, California. 1924. Plate 12-C, in U.S.Geological Survey Professional Paper 172. 1932. #1:/California-Professional paper 172/fhg00800 ID. Ferguson, H.G. 800 Walls of vein due to post-mineral movement, Plumbago mine, No. 4 level, the quartz is cut by the hanging wall but on the footwall side grades into stringers, which are cut off by the footwall fault. Sierra County, California. 1924. Plate 15-B, in U.S.Geological Survey Professional Paper 172. 1932. #1:/California-Professional paper 172/fhg00826 ID. Ferguson, H.G. 826 Crumpled hornblende schist, siliceous facies of Tightner formation, valley of Kanaka Creek. Sierra County, California. 1924. Plate 2-C, in U.S.Geological Survey Professional Paper 172. 1932. #1:/California-Professional paper 172/fhg00828 ID. Ferguson, H.G. 828 Detail showing contorted banding of chert, Kanaka formation: south fork of Yuba River near Washington. Nevada County, California. 1924. Plate 4-D, in U.S.Geological Survey Professional Paper 172. 1932. #1:/California-Professional paper 172/fhg00829 ID. Ferguson, H.G. 829 Chert of Kanaka formation: south fork of Yuba River near Washington. Nevada County, California. 1924. Plate 4-C, in U.S.Geological Survey Professional Paper 172. 1932. #1:/Texas-Professional paper 175/gmi00188 ID. Goldman, M.I. 188 Core from a depth of about 950 feet in the Texas Exploration Co.'s Warren No. 1 well on the Hockley salt dome, showing a breccia of calcareous rock fragments in sandy clay; outside surface. This breccia might be made up of sedimentary beds that overlay, in depth, the bedded salt from which the salt of the salt stock is derived and that were brecciated when the salt broke through them to form the stock. U.S.N.M. 97794. About natural size; specimen probably received from Mr. Statti, of Texas Exploration Co. Harris County, Texas. Circa 1930. Plate 45, U.S.Geological Survey Professional Paper 175. 1933. #1:/Texas-Professional paper 175/gmi00187 ID. Goldman, M.I. 187 Core from a depth of about 950 feet in the Texas Exploration Co.'s Warren No. 1 well on the Hockley salt dome, showing a breccia of calcareous rock fragments in sandy clay; polished face. This breccia might be made up of sedimentary beds that overlay, in depth, the bedded salt from which the salt of the salt stock is derived and that were brecciated when the salt broke through them to form the stock. U.S.N.M. 97794. About natural size; specimen probably received from Mr. Statti, of Texas Exploration Co. Harris County, Texas. Circa 1930. Plate 46, U.S. Geological Survey Professional Paper 175. 1933. #1:/Colorado-Professional paper 185/lre00028 ID. Landon, R.E. 28 Massive Sawatch quartzite near Montgomery: Park County, Colorado. 1930. Plate 1-A, U.S.Geological Survey Professional Paper 185. 1936. #1:/Colorado-Professional paper 185/lre00032 ID. Landon, R.E. 32 Outcrop of Sawatch quartzite below Montgomery: Park County, Colorado. 1930. Plate 1-B, U.S.Geological Survey Professional Paper 185. 1936. #1:/Colorado-Professional paper 185/lre00029 ID. Landon, R.E. 29 Shaly "Red-cast beds" at top of Sawatch quartzite near Montgomery: Park County, Colorado. 1930. Plate 2-A, U.S.Geological Survey Professional Paper 185. 1936. #1:/Colorado-Professional paper 185/lre00030 ID. Landon, R.E. 30 Thin bedded Manitou limestone near Montgomery: Park County, Colorado. 1930. Plate 2-B, U.S.Geological Survey Professional Paper 185. 1936. #1:/Colorado-Professional paper 185/lre00031 ID. Landon, R.E. 31 Medium bedded Manitou limestone below Montgomery: Park County, Colorado. 1930. Plate 2-C, U.S.Geological Survey Professional Paper 185. 1936. #1:/Colorado-Professional paper 185/lre00067 ID. Landon, R.E. 67 Weber grits on South Mosquito Creek. Park County, Colorado. 1930. Plate 3-A, U.S.Geological Survey Professional Paper 185. 1936. #1:/Colorado-Professional paper 185/lre00068 ID. Landon, R.E. 68 Weber shales on London Mountain: Park County, Colorado. 1930. Plate 3-B, U.S.Geological Survey Professional Paper 185. 1936. #1:/Colorado-Professional paper 185/lre00072 ID. Landon, R.E. 72 Manitou limestone with chert: Park County, Colorado. 1930. Plate 3-C, U.S.Geological Survey Professional Paper 185. 1936. #1:/Wyoming-Professional paper 185/bwh00606 ID. Bradley, W.H. 606 West and northwest across the valley of Red Creek, showing the Gilbert peak surface sloping northward from the south end of Little Mountain and passing through Miller Mountain. These photographs were taken from Pine Mountain, whose flat top is a remnant of the Gilbert Peak surface comparable to the south end of Little Mountain. Sweetwater County, Wyoming. 1930. These 3 photos were composed to form plate 36- B, in U.S.Geological Survey Professional Paper 185. 1936. #1:/Wyoming-Professional paper 185/bwh00598 ID. Bradley, W.H. 598 North across Henrys Fork, showing the south end of Cedar Mountain with its thick capping of the Bishop conglomerate, which contains a huge lens of coarser grained material that weathers into columnar forms. Below the conglomerate are tuffaceous beds of the Bridger formation. Sweetwater County, Wyoming. 1930. Plate 37-A, U.S.Geological Survey Professional Paper 185. 1936. #1:/Wyoming-Professional paper 185/bwh00603 ID. Bradley, W.H. 603 Irregular contact due to local scour and fill where the Bishop conglomerate rests on the beds of the Green River formation, which here make up the east spur of Little Mountain. Sweetwater County, Wyoming. 1930. Plate 39-A, with line to mark contact, U.S.Geological Survey Professional Paper 185. 1936. #1:/Wyoming-Professional paper 185/bwh00602 ID. Bradley, W.H. 602 Detail of the Bishop conglomerate on the south side of Little Mountain; the larger boulders are a little more than 1 foot across. Sweetwater County, Wyoming. 1930. Plate 39-B, U.S.Geological Survey Professional Paper 185. 1936. #1:/Colorado- Professional paper 185/sjd00136 ID. Sears, J.D. 136 Formed to make left half of a panorama eastward and southeastward across Vermilion Creek in sec. 36, T.10 N., R. 101 W., showing the Bear Mountain surface tilted about 13 degrees SW and truncating the Mesozoic and Paleozoic rocks, which dip steeply northeastward. At the canyon of Vermilion Creek the Bear Mountain surface has no conglomerate or other covering, but a little way to the east and to the south, it passes beneath the Browns Park formation and its basal conglomerate. The dip of the beds in the Browns Park formation coincides closely with the inclination of the erosion surface. Moffat County, Colorado. Circa 1921. Plate 40, with graphics, in U.S.Geological Survey Professional Paper 185. 1936. #1:/Colorado-Professional paper 185/sjd00139 ID. Sears, J.D. 139 Formed to make right half of a panorama eastward and southeastward across Vermilion Creek in sec. 36, T.10 N., R. 101 W., showing the Bear Mountain surface tilted about 13 degrees SW and truncating the Mesozoic and Paleozoic rocks, which dip steeply northeastward. At the canyon of Vermilion Creek the Bear Mountain surface has no conglomerate or other covering, but a little way to the east and to the south, it passes beneath the Browns Park formation and its basal conglomerate. The dip of the beds in the Browns Park formation coincides closely with the inclination of the erosion surface. Moffat County, Colorado. Circa 1921. Plate 40, with graphics, in U.S.Geological Survey Professional Paper 185. 1936. #1:/Colorado-Professional paper 185/bwh00553 ID. Bradley, W.H. 553 View northward down Blacks Fork from the crest of a frontal moraine of the Blacks Fork Stage, showing in the middle distance a long low terminal moraine of the same stage. Uinta County, Utah, 1930. Plate 44-B, in U.S.Geological Survey Professional Paper 185. 1936. #1:/Colorado-Professional paper 185/bwh00680 ID. Bradley, W.H. 680 Northwestward across the north end of Irish Canyon, showing a small undisturbed remnant of the Bear Mountain surface truncating the upturned Mesozoic and Paleozoic rocks and abutting the north side of Cold Spring Mountain, in sec. 33, T. 11 N. R. 101 W. The skyline in the left half of the view marks the top of Cold Spring Mountain, a remnant of the Gilbert Peak surface. The Weber quartzite makes small monadnocks or island mounts (see skyline on the right) that rise above the Bear Mountain surface; further right the surface passes beneath beds of the Browns Park formation. Moffat County, 1933. Plate 41-A, in U.S.Geological Survey Professional Paper 185. 1936. #1:/Colorado-Professional paper 185/bwh00681 ID. Bradley, W.H. 681 Northwestward across the north end of Irish Canyon, showing a small undisturbed remnant of the Bear Mountain surface truncating the upturned Mesozoic and Paleozoic rocks and abutting the north side of Cold Spring Mountain, in sec. 33, T. 11 N. R. 101 W. The skyline in the left half of the view marks the top of Cold Spring Mountain, a remnant of the Gilbert Peak surface. The Weber quartzite makes small monadnocks or island mounts (see skyline on the right) that rise above the Bear Mountain surface; further right the surface passes beneath beds of the Browns Park formation. Moffat County, 1933. Plate 41-A, in U.S.Geological Survey Professional Paper 185. 1936. #1:/Colorado-Professional paper 183/ghs00330 ID. Gale, H.S. 330 Form this panorama of undifferentiated Navajo, Carmel and Entrada formations in gap of Skull Creek, sec. 36, T. 4 N., R. 101 W. Moffatt County, Colorado. 1906. Plate 21-C, in U.S. Geological Survey. Professional paper 183. 1936. #1:/Colorado-Professional paper 183/ghs00331 ID. Gale, H.S. 331 Form this panorama of undifferentiated Navajo, Carmel and Entrada formations in gap of Skull Creek, sec. 36, T. 4 N., R. 101 W. Moffatt County, Colorado. 1906. Plate 21-C, in U.S. Geological Survey. Professional paper 183. 1936 #1:/Utah-Professional paper 183/ghs00408 ID. Gale, H.S. 408 Exposures in Flaming Gorge of Green River; Triassic shales; Navajo sandstone, Carmel formation and Entrada sandstone; soft marine Jurassic shales and thin limestones of the Curtis formation and also the Morrison formation; Dakota (?) sandstone, this is the same view taken and published in the King Survey. Daggett County, Utah. 1907. Plate 21-A, in U.S. Geological Survey. Professional paper 183. 1936. #1:/Texas-Professional paper 146/gmi00193 ID. Goldman. M.I. 193 Specimen G. 105: Ellenburger limestone and limestone of Boone Age in contact, graphics mark approximate base of Mississippian material; indicate approximate position of thin sections. San Saba County, Texas. n.d. Plate 7, U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00194 ID. Goldman. M.I. 194 Thin section of the upper part of the Ellenburger limestone corresponding to position on plate 7; shows a pellet layer and a solid layer. San Saba County, Texas. n.d. Plate 8-B, with graphics, U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00195 ID. Goldman. M.I. 195 Detail from plate 7, showing pellets partly embedded in the underlying solid layer: San Saba County, Texas. n.d. Plate 9-A, in U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00196 ID. Goldman. M.I. 196 Detail of thin section, showing partial disintegration of Ellenburger pellets: San Saba County, Texas. n.d. Plate 9-B, with graphics, in U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00197 ID. Goldman. M.I. 197 Thin sections of Ellenburger limestone: showing especially the distribution of yellow granular calcite and partly silicified fragments of Ellenburger. San Saba County, Texas. n.d. Plate 11-A, with graphics, in U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00198 ID. Goldman. M.I. 198 Detail from plate 7 showing internal cast of fossil in direct contact with surrounding pellets of Ellenburger limestone. San Saba County, Texas. n.d. Plate 8-A, with graphics, U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00199 ID. Goldman. M.I. 199 Detail showing rounded pebble composed of Ellenburger pellets inclosed in a later layer of the Ellenburger and fissure containing granular yellow carbonate. San Saba County, Texas. n.d. Plate 10-B, with graphics, in U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00200 ID. Goldman. M.I. 200 Detail showing an angular fragment of Ellenburger limestone inclosed in a later layer of the Ellenburger. San Saba County, Texas. n.d. Plate 10-A, with graphics, in U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00201 ID. Goldman. M.I. 201 Detail from Goldman photo 197: showing appreciable movement along stylolite. San Saba County, Texas. n.d. Plate 13-A, in U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00203 ID. Goldman. M.I. 203 Detail from Goldman photo 197: showing little movement along the stylolite. San Saba County, Texas. n.d. Plate 13-B, in U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00206 ID. Goldman. M.I. 206 General view of thin section G 105-D: showing contact of Ellenburger material and basal conglomerate of Boone Age. San Saba County, Texas. n.d. Plate 14, in U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00207 ID. Goldman. M.I. 207 Detail of irregular calcite fragments of Goldman photo 206. San Saba County, Texas. n.d. Plate 15, in U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00208 ID. Goldman. M.I. 208 Thin section of typical limestone of Boone Age, full of large fossil fragments; specimen taken about 1 foot above the base. San Saba County, Texas. n.d. Plate 11-B, in U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00209 ID. Goldman. M.I. 209 Enlargement of Echinoderm fragment from Goldman photo 208. San Saba County, Texas. n.d. Plate 16, in U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00212 ID. Goldman. M.I. 212 Detail of Goldman photo 195: showing secondary growth of calcite around fossil fragments in the limestone of Boone Age. San Saba County, Texas. n.d. Plate 17-B, in U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00213 ID. Goldman. M.I. 213 Polished face of specimen G 114-II, showing a polished surface about 2.5 centimeters below that in Goldman photo 214. San Saba County, Texas. n.d. Plate 20, in U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00214 ID. Goldman. M.I. 214 Polished face of specimen G 114-I, showing folded and silicified Ellenburger limestone and limestone of Boone Age. San Saba County, Texas. n.d. Plate 19, with diagram, in U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00215 ID. Goldman. M.I. 215 An early edition of the diagrammatic illustration of flow line and the distribution of the five different kinds of rock in photo 213: San Saba County, Texas. n.d. Plate 21, apparently with some minor changes, in U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00216 ID. Goldman. M.I. 216 General view of thin section G 1141 I; showing silicified Ellenburger limestone. San Saba County, Texas. n.d. Plate 22, in U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00218 ID. Goldman. M.I. 218 General view of thin section G 114-2, showing the limestone of Boone Age partly silicified and perhaps affected by flowage. San Saba County, Texas. n.d. Plate 25, in U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00219 ID. Goldman. M.I. 219 General view of thin section G 114-3, showing a mixture of Ellenburger limestone and limestone of Boone Age partly silicified. San Saba County, Texas. n.d. Plate 26, in U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00220 ID. Goldman. M.I. 220 General view of thin section G 114-4, showing unsilicified Ellenburger limestone somewhat subjected to flowage and to fracture. San Saba County, Texas. n.d. Plate 24, in U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00221 ID. Goldman. M.I. 221 General view of thin section G 114-5; showing limestone of Boone Age not much disturbed, resting on silicified and probably fault fractured Ellenburger limestone. San Saba County, Texas. n.d. Plate 23, in U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00222 ID. Goldman. M.I. 222 General view of thin section G 114-6, showing Ellenburger limestone and limestone of Boone Age mixed and shattered by flowage and partly silicified. San Saba County, Texas. n.d. Plate 27, in U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00223 ID. Goldman. M.I. 223 General view of thin section G 114-8, showing Ellenburger limestone and limestone of Boone Age mixed and shattered by flowage against fault line in photo 214. San Saba County, Texas. n.d. Plate 28, in U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00224 ID. Goldman. M.I. 224 Detail of Goldman photo 194, and 195: showing growth of calcite around a fossil fragment in the Ellenburger. San Saba County, Texas. n.d. Plate 17-A, in U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00225 ID. Goldman. M.I. 225 Detail of photo 22#1: showing calcite crystal with cloudy granular rim and irregular clear center; plain light. San Saba County, Texas. n.d. Plate 30-A, in U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00226 ID. Goldman. M.I. 226 Detail of photo 22#1: showing calcite crystal with cloudy granular rim and irregular clear center; between crossed nicols, showing inclusion of the calcite matrix in the envelope of granular cloudy calcite. San Saba County, Texas. n.d. Plate 30-B, in U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00227 ID. Goldman. M.I. 227 Detail of photo 22#1: detail similar to photo 225 but with a more regular clear nucleus; plain light,. San Saba County, Texas. n.d. Plate 30-C, in U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00228 ID. Goldman. M.I. 228 Detail of photo 22#1: detail similar to photo 225 but with a more regular clear nucleus; between crossed nicols. San Saba County, Texas. n.d. Plate 30-D, in U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00229 ID. Goldman. M.I. 229 Detail of photo 22#1: similar to plate 30, but showing three grains in contact; plain light. San Saba County, Texas. n.d. Plate 31-A, in U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00230 ID. Goldman. M.I. 230 Detail of photo 22#1: similar to plate 30, but showing three grains in contact; between crossed nicols. San Saba County, Texas. n.d. Plate 31-B, in U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00231 ID. Goldman. M.I. 231 General view of the glauconitic and phosphatic sand of thin section G 114-10, with some of the wall rock of silicified Ellenburger limestone; plain light. San Saba County, Texas. n.d. Plate 29-A, in U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00232 ID. Goldman. M.I. 232 General view of the glauconitic and phosphatic sand of thin section G 114-10, with some of the wall rock of silicified Ellenburger limestone: between crossed nicols. San Saba County, Texas. n.d. Plate 29-B, in U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00233 ID. Goldman. M.I. 233 Detail of photo 216; showing pellets in silicified Ellenburger limestone of fine grain and the margins of a calcite crystal of organic origin replaced by coarse grained silica; between crossed nicols. San Saba County, Texas. n.d. Plate 32-A, in U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00234 ID. Goldman. M.I. 234 Detail of photo 216; showing coarse calcite crystals of organic origin in the midst of silicified Ellenburger limestone of fine grain, the large calcite crystals partly replaced by fine and coarse grained silica; between crossed nicols. San Saba County, Texas. n.d. Plate 32-B, in U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00235 ID. Goldman. M.I. 235 Detail of photo 216; showing a large calcite crystal in the midst of silicified Ellenburger limestone of fine grain replaced around the border by coarse and fine grained silica; plain light. San Saba County, Texas. n.d. Plate 33-A, in U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00236 ID. Goldman. M.I. 236 Detail of photo 216; showing a large calcite crystal in the midst of silicified Ellenburger limestone of fine grain replaced around the border by coarse and fine grained silica; between crossed nicols. San Saba County, Texas. n.d. Plate 33-B, in U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00237 ID. Goldman. M.I. 237 Detail of Goldman photo 197, showing a partly silicified fragment in the Ellenburger limestone: plain light. San Saba County, Texas. n.d. Plate 12-A, in U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00238 ID. Goldman. M.I. 238 Detail of Goldman photo 197, showing a partly silicified fragment in the Ellenburger limestone: between crossed nicols. San Saba County, Texas. n.d. Plate 12-B, in U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00239 ID. Goldman. M.I. 239 Detail of Goldman photo 206: showing a silicified fossil fragment from the limestone of Boone Age: plain light. San Saba County, Texas. n.d. Plate 18-A, in U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00240 ID. Goldman. M.I. 240 Detail of Goldman photo 206: showing a silicified fossil fragment from the limestone of Boone Age: between cross nicols. San Saba County, Texas. n.d. Plate 18-B, in U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00241 ID. Goldman. M.I. 241 Enlargement of photo 222: showing organic fragment partly silicified; plain light. San Saba County, Texas. n.d. Plate 31-C, in U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00242 ID. Goldman. M.I. 242 Enlargement of photo 222: showing organic fragment partly silicified; between crossed nicols, showing the coarse grain of the silica. San Saba County, Texas. n.d. Plate 31-D, in U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00244 ID. Goldman. M.I. 244 Detail of photo 216; showing meshwork of veins in silicified Ellenburger limestone. San Saba County, Texas. n.d. Plate 33-C, in U.S.Geological Survey Professional Paper 146. 1926. #1:/Texas-Professional paper 146/gmi00245 ID. Goldman. M.I. 245 Detail of photo 216; showing intersecting group of straight veins in silicified Ellenburger limestone. San Saba County, Texas. n.d. Plate 33-D, in U.S.Geological Survey Professional Paper 146. 1926. #1:/Colorado-Professional paper 186/dch00535 ID. Dane, C.H. 535 Typical outcrop of the lower part of the Smoky Hill marl member of the Niobrara formation, looking northwest from the SW1/4 sec. 16, T. 21 S., R. 49W. Bent County, Colorado. 1931. Plate 65-C, in U.S. Geological Survey. Professional paper 186. 1940. #1:/Colorado-Professional paper 186/pwg00118 ID. Pierce, W.G. 118 Detailed view of weathered top or core of a "tepee butte" in NE ¼ sec. 35, T. 12 S., R. 49 W. The rock is an impure limestone in which Lucina occidentalis is exceedingly abundant. Cheyenne County, Colorado. October 1931. Plate 65-B, in U.S. Geological Survey. Professional paper 186. 1940. #1:/Colorado-Professional paper 186/pwg00121 ID. Pierce, W.G. 121 Contact between the Hays limestone member of the Niobrara formation and the Codell sandstone member of the Carlile shale in the SE ¼ sec. 21, T. 21 S., R. 49 W., the hammer rests on a hard bed of calcareous sandstone with the Codell, about 2 feet below the base of the Hays limestone. Bent County, Colorado. October 1931. Plate 65-D, in U.S. Geological Survey. Professional paper 186. 1940. #1:/Texas-Professional paper 187/kpb00036 ID. King, P.B. 36 Monument Springs dolomite member of Marathon limestone, north of old Fort Pena Colorado, shows characteristic weathering of member. Brewster County, Texas. July 1930. Plate 3-B, U.S.Geological Survey Professional Paper 187. 1937. #1:/Texas-Professional paper 187/kpb00039 ID. King, P.B. 39 Upper member of Marathon limestone, exposed in bed of Alsate Creek, 3 miles west- southwest of old Fort Pena Colorado; shows alternation of flaggy limestones and shales. Brewster County, Texas. July 1930. Plate 3-A, U.S.Geological Survey Professional Paper 187. 1937. #1:/Texas-Professional paper 187/kpb00042 ID. King, P.B. 42 Upper cherts, limestones, and shales of Fort Pena formation: in bed of Alsate Creek 3 miles west-southwest of old Fort Pena Colorado. Brewster County, Texas. July 1930. Plate 3-C, U.S.Geological Survey Professional Paper 187. 1937. #1:/Texas-Professional paper 187/kpb00043 ID. King, P.B. 43 Woods Hollow shale, near old Louis Granger place, 6 miles southeast of Marathon, shows alternation of shales and thin flaggy sandstones and limestones. Brewster County, Texas. June 1929. Plate 3-C, U.S.Geological Survey Professional Paper 187. 1937. #1:/Texas-Professional paper 187/kpb00046 ID. King, P.B. 46 Basal conglomerate of Maravillas chert at Rock House Gap; hammer rests on a 5-foot boulder of calcareous sandstone. Brewster County, Texas. November 1930. Plate 4-B, U.S.Geological Survey Professional Paper 187. 1937. #1:/Texas-Professional paper 187/kpb00059 ID. King, P.B. 59 Maravillas chert at Rock House Gap, shows alternation of limestone and black bedded chert. Brewster County, Texas. June 1929. Plate 4-B, U.S.Geological Survey Professional Paper 187. 1937. #1:/Texas-Professional paper 187/kpb00062 ID. King, P.B. 62 Detail of lower novaculite member; of Caballos novaculite, at gap south of old Fort Pena Colorado. Brewster County, Texas. October 1930. Plate 4-D, U.S.Geological Survey Professional Paper 187. 1937. #1:/Texas-Professional paper 187/kpb00071 ID. King, P.B. 71 Massive sandstone of upper part of Tesnus formation, on San Francisco Creek: north of Devils Backbone. Brewster County, Texas. November 1930. Plate 9-A, U.S.Geological Survey Professional Paper 187. 1937. #1:/Texas-Professional paper 187/kpb00074 ID. King, P.B. 74 Shales and sandy shales of upper part of Haymond formation, in cut on Dugout Creek, 2.5 miles south of Dugout Mountain. Brewster County, Texas. November 1930. Plate 9- C, U.S.Geological Survey Professional Paper 187. 1937. #1:/Texas-Professional paper 187/kpb00091 ID. King, P.B. 91 West Bourland Mountain, looking northeast; Woods Hollow shale; Maravillas chert; Caballos novaculite (lower chert member and lower novaculite member; upper chert member) Tesnus formation; Dimple limestone; Haymond formation. Brewster County, Texas. October 1930. Plate 6-C, with graphics, U.S.Geological Survey Professional Paper 187. 1937. #1:/Texas-Professional paper 187/kpb00092 ID. King, P.B. 92 West Bourland Mountain, looking northeast; Woods Hollow shale; Maravillas chert; Caballos novaculite (lower chert member and lower novaculite member; upper chert member) Tesnus formation; Dimple limestone; Haymond formation. Brewster County, Texas. October 1930. Plate 6-C, with graphics, U.S.Geological Survey Professional Paper 187. 1937. #1:/Texas-Professional paper 187/kpb00100 ID. King, P.B. 100 Form a panorama of East Bourland Mountain from southeast, from northeast end of Simpson Springs Mountain; showing flanking hogback of Caballos novaculite, Maravillas chert forms a high ridge along the axis. Brewster County, Texas. October 1930. Plate 6-A, U.S.Geological Survey Professional Paper 187. 1937. #1:/Texas-Professional paper 187/kpb00101 ID. King, P.B. 101 Form a panorama of East Bourland Mountain from southeast, from northeast end of Simpson Springs Mountain; showing flanking hogback of Caballos novaculite, Maravillas chert forms a high ridge along the axis. Brewster County, Texas. October 1930. Plate 6-A, U.S.Geological Survey Professional Paper 187. 1937. #1:/Texas-Professional paper 187/kpb00113 ID. King, P.B. 113 Black Peak from south, shows exposure of Black Peak thrust, up thrown block consists of limestones of Gaptank formation, dipping to the east. On the downthrown block, limestones of Edwards formation are dragged to a vertical position near the fault. Brewster County, Texas. June 1930. Plate 13-C, with graphics, U.S.Geological Survey Professional Paper 187. 1937. #1:/Texas-Professional paper 187/kpb00114 ID. King, P.B. 114 Black Peak, in Del Norte Mountains from northeast, the peak is a mass of limestone of the Gaptank formation thrust against the limestones of the Comanche series, which crop out in the background. Brewster County, Texas. June 1930. Plate 13-A, with graphics, U.S.Geological Survey Professional Paper 187. 1937. #1:/Texas-Professional paper 187/kpb00119 ID. King, P.B. 119 Del Norte gap from summit of Del Norte Mountains, to the north, in the distance vertical strata of Glen Rose formation are thrust over flaggy limestones of Eagle Ford formation. Brewster County, Texas. August 1930. Plate 13-B, with graphics, U.S.Geological Survey Professional Paper 187. 1937. #1:/Texas-Professional paper 187/kpb00135 ID. King, P.B. 135 Form a panorama of folding in novaculite on east side of Maravillas Creek at Maravillas Gap. Brewster County, Texas. August 1930. Plate 7-C, with graphics, U.S.Geological Survey Professional Paper 187. 1937. #1:/Texas-Professional paper 187/kpb00136 ID. King, P.B. 136 Form a panorama of folding in novaculite on east side of Maravillas Creek at Maravillas Gap. Brewster County, Texas. August 1930. Plate 7-C, with graphics, U.S.Geological Survey Professional Paper 187. 1937. #1:/Texas-Professional paper 187/kpb00144 ID. King, P.B. 144 Novaculite ridges in Lightning Hills, looking southwest from elevation point 4,462 (ft), lowlands in distance carved from Ordovician strata on crest of Dagger Flat anticlinorium; Woods Hollow shale; Maravillas chert; Caballos novaculite, Tesnus formation. Brewster County, Texas. November 1930. Plate 7-B, with graphics, U.S.Geological Survey Professional Paper 187. 1937. #1:/Texas-Professional paper 187/kpb00145 ID. King, P.B. 145 Novaculite ridges in Lightning Hills, looking southwest from elevation point 4,462 (ft), lowlands in distance carved from Ordovician strata on crest of Dagger Flat anticlinorium; Woods Hollow shale; Maravillas chert; Caballos novaculite, Tesnus formation. Brewster County, Texas. November 1930. Plate 7-B, with graphics, U.S.Geological Survey Professional Paper 187. 1937. #1:/Texas-Professional paper 187/kpb00147 ID. King, P.B. 147 Novaculite ridges in Lightning Hills, looking northwest from elevation point 4,450 (ft); Lightning overthrust crops out in valley in foreground. Convoluted ridges of folded and faulted novaculite in middle distance. Brewster County, Texas. November 1930. Plate 7-A, with graphics, U.S.Geological Survey Professional Paper 187. 1937. #1:/Texas-Professional paper 187/kpb00148 ID. King, P.B. 148 Novaculite ridges in Lightning Hills, looking northwest from elevation point 4,450 (ft); Lightning overthrust crops out in valley in foreground. Convoluted ridges of folded and faulted novaculite in middle distance. Brewster County, Texas. November 1930. Plate 7-A, with graphics, U.S.Geological Survey Professional Paper 187. 1937. #1:/Texas-Professional paper 187/kpb00149 ID. King, P.B. 149 Novaculite ridges in Lightning Hills, looking northwest from elevation point 4,450 (ft); Lightning overthrust crops out in valley in foreground. Convoluted ridges of folded and faulted novaculite in middle distance. Brewster County, Texas. November 1930. Plate 7-A, with graphics, U.S.Geological Survey Professional Paper 187. 1937. #1:/Texas-Professional paper 187/kpb00150 ID. King, P.B. 150 Novaculite ridges in Lightning Hills, looking northwest from elevation point 4,450 (ft); Lightning overthrust crops out in valley in foreground. Convoluted ridges of folded and faulted novaculite in middle distance. Brewster County, Texas. November 1930. Plate 7-A, with graphics, U.S.Geological Survey Professional Paper 187. 1937. #1:/Texas-Professional paper 187/kpb00182 ID. King, P.B. 182 Limestones of Glen Rose formation intruded by igneous rock, on south margin of Marathon basin. The sharp peak, which is composed of igneous rock is elevation point 4,748 (feet), looking southwest: Tesnus formation. Brewster County, Texas. June 1929. Plate 14-A, with graphics, U.S.Geological Survey Professional Paper 187. 1937. #1:/Texas-Professional paper 187/kpb00183 ID. King, P.B. 183 Limestones of Glen Rose formation of the Maravillas scarp, dipping south off Marathon uplift. Sandstones of Tesnus formation crop out on lower part of canyon walls, view looking southward from point at which view in photo 182 was taken. Brewster County, Texas. June 1929. Plate 14-B, with graphics, U.S.Geological Survey Professional Paper 187. 1937 #1:/Texas-Professional paper 187/kpb00186 ID. King, P.B. 186 Rounded boulder of brecciated chert from Caballos formation in boulder bed member; a mile and half north of summit of Housetop Mountain. Brewster County, Texas. June 1931. Plate 11-D, U.S.Geological Survey Professional Paper 187. 1937. #1:/Texas-Professional paper 187/kpb00187 ID. King, P.B. 187 Boulder of Pennsylvanian limestone, projecting from the mudstone matrix of the boulder bed 1 mile west of summit of Housetop Mountain. Brewster County, Texas. June 1931. Plate 11-F, U.S.Geological Survey Professional Paper 187. 1937. #1:/Texas-Professional paper 187/kpb00189 ID. King, P.B. 189 Boulder of novaculite in boulder bed member, about 2.5 miles north of summit of Housetop Mountain, the boulder has been shattered by later deformation and weathering. Brewster County, Texas. June 1931. Plate 11-E, U.S.Geological Survey Professional Paper 187. 1937. #1:/Texas-Professional paper 187/kpb00191 ID. King, P.B. 191 Exposures of boulder bed member, a mile west of Housetop Mountain; knobs on hillside in middle distance are boulder of novaculite and of Pennsylvanian limestone; Caballos novaculite, Tesnus formation, Pennsylvanian limestone: diameter of each boulder given in feet (see published photo); sandstone and shales of Haymond formation underlying boulder bed member. Brewster County, Texas. June 1931. Plate 11-C, U.S.Geological Survey Professional Paper 187. 1937. #1:/Texas-Professional paper 187/kpb00192 ID. King, P.B. 192 Water worn cobbles of Dimple and Gaptank limestones in first conglomerate member of Gaptank formation: a mile and half south of Gap Tank. Pecos County, Texas. June 1931. Plate 11-B, U.S.Geological Survey Professional Paper 187. 1937. #1:/Texas-Professional paper 187/kpb00194 ID. King, P.B. 194 Folding and thrusting of thin-bedded shales and sandy shales of upper part of Haymond formation, in cut on Dugout Creek, 1.5 miles southeast of Dugout Mountain, photo by C.R. Longwell. Brewster County, Texas. November 1930. Plate 9-D, U.S.Geological Survey Professional Paper 187. 1937. #1:/Texas-Professional paper 187/kpb00195 ID. King, P.B. 195 North end of Housetop Mountain, limestones, marls and sandstones of Comanche series are exposed in peak; strata of Haymond formation exposed in foreground. Brewster County, Texas. June 1931. Plate 13-D, with graphics, U.S.Geological Survey Professional Paper 187. 1937. #1:/Utah-Professional paper 189/baa00199 ID. Baker, A.A. 199 Form a panorama of Bears Ears on south side of Elk Plateau, flat in foreground shows general surface of the plateau developed in Shinarump conglomerate; buttes composed of Chinle shale capped Wingate sandstone. San Juan County, Utah. 1927. Plate 4-A in U.S. Geological Survey. Professional paper 188. 1938 #1:/Utah-Professional paper 189/baa00200 ID. Baker, A.A. 200 Form a panorama of Bears Ears on south side of Elk Plateau, flat in foreground shows general surface of the plateau developed in Shinarump conglomerate; buttes composed of Chinle shale capped Wingate sandstone. San Juan County, Utah. 1927. Plate 4-A in U.S. Geological Survey. Professional paper 188. 1938 #1:/Utah-Professional paper 189/mhd00407 ID. Miser, H.D. 407 Ruins of cliff dweller's house: Butler Wash, Navajo Sandstone. San Juan County, Utah. 1921. Plate 8-B in U.S. Geological Survey. Professional paper 188. 1938. #1:/Utah-Professional paper 189/mhd00572 ID. Miser, H.D. 572 Mexican Hat, an erosion remnant of Halgaito strata preserved in the Mexican Hat syncline in Lime Creek Valley; Raplee anticline in background. Photo by R.N. Allen. San Juan County, Utah. July 22, 1921. Plate 4-B in U.S. Geological Survey. Professional paper 188. 1938. #1:/Utah-Professional paper 189/weg00163 ID. Woodruff, E.G. 163 Lime Creek valley showing erosion surface and vegetation, butte of Halgaito sandstone in middle distance; south face of Cedar Mesa in distance. San Juan County, Utah. August 1910. Plate 4-C in U.S. Geological Survey. Professional paper 188. 1938. #1:/Utah-Professional paper 189/lwt03119 ID. Lee, W.T. 3119 View looking northwest from head of Armstrong Canyon, across flat into which upper White Canyon and its tributaries are cut. San Juan County, Utah. 1925. Plate 5-B in U.S. Geological Survey. Professional paper 188. 1938. #1:/Utah-Professional paper 189/lec00230 ID. LaRue, E.C. 230 Looking upstream at junction of Colorado and San Juan Rivers; Kayenta and Navajo strata. San Juan County, Utah. August 29, 1915. Plate 7-A in U.S. Geological Survey. Professional paper 188. 1938 #1:/Utah-Professional paper 189/lwt03117 ID. Lee, W.T. 3117 Wall of Arch Canyon near its head; composed of Cedar Mesa sandstone overlain by Organ Rock, De Chelly and Moenkopi beds. San Juan County, Utah. 1925. Plate 11-C in U.S. Geological Survey. Professional paper 188. 1938. #1:/Utah-Professional paper 189/weg0159b ID. Woodruff, E.G. 159b West flank of Raplee anticline at Mexican Hat, view looking north across Lime Creek Valley toward Cedar Mesa. Rico strata in foreground; Halgaito in middle distance. San Juan County, Utah. July 2, 1910. Plate 16-D in U.S. Geological Survey. Professional paper 188. 1938. #1:/Utah-Professional paper 189/lwt03124 ID. Lee, W.T. 3124 Owachomo natural bridge in wall of Armstrong Canyon: Cedar Mesa sandstone. Natural Bridges National Monument, Utah. Circa 1925. Plate 19-B in U.S. Geological Survey. Professional paper 188. 1938. #1:/Fossils-Professional paper 189/miscel01 ID. Miscellaneous 1 Species and genera of Tertiary Noetinae. Plate 3 in U.S. Geological Survey. Professional paper 189. 1939. #1:/Alabama-Professional paper 189/miscel02 ID. Miscellaneous 2 Amohisteginidae, Cassidulinidae, Anomalinidae and Planorbulinide from Choctaw Bluff, Clarke County, Alabama. n.d. Plate 28 in U.S. Geological Survey. Professional paper 189. 1939. #1:/New Mexico-Professional paper 189/hcb00045 ID. Hunt, C.B. 45 Dike of basalt and basaltic breccia intruding Cretaceous shale; in sec. 3, T. 14 N., R. 3 W. Sandoval County, New Mexico. 1930. Plate 17-A, U.S.Geological Survey Professional Paper 189. 1938. #1:/New Mexico-Professional paper 189/hcb00062 ID. Hunt, C.B. 62 Cross section of basaltic next exposed by erosion in Grant Ridges, 6 miles northeast of Grant, view looking southwest in sec. 3, T. 11 S., R. 9 W. Basalt in core is jointed in vertical columns and surrounded by a thin zone of platy jointing developed along the contact with white tuff. Bedded breccia overlies the tuff, and basaltic lava overlies the breccia on the far side of the cone. The tuff, chiefly rhyolitic, was erupted from Mount Taylor. Valencia County, New Mexico. 1932. Plate 11-A, U.S.Geological Survey Professional Paper 189. 1938. #1:/New Mexico-Professional paper 189/hcb00064 ID. Hunt, C.B. 64 Cliff face exposing basaltic breccia on rhyolitic tuff near the volcanic neck: in sec. 3, T. 11 N., R. 9 W. Valencia County, New Mexico. 1932. Plate 11-B, U.S.Geological Survey Professional Paper 189. 1938. #1:/New Mexico-Professional paper 189/hcb00103 ID. Hunt, C.B. 103 Evans Peak: detail of columnar jointing and outer shell of irregular platy jointing. Photo by R.C. Becker. Sandoval County, New Mexico. 1931. Plate 15-B, with graphics, U.S. Geological Survey Professional Paper 189. 1938. #1:/New Mexico-Professional paper 189/hcb00117 ID. Hunt, C.B. 117 Flat lying unbroken Santa Fe formation crossing a normal fault in Cretaceous shale, looking north in Sedillo Grant 2 miles northeast of Suwanee; Santa Fe formation; Cretaceous shale. Valencia County, New Mexico. 1931. Plate 19-A, with graphics, U.S.Geological Survey Professional Paper 189. 1938. #1:/New Mexico-Professional paper 189/hcb00195 ID. Hunt, C.B. 195 Porphyritic andesite flows near base of north flank of Mount Taylor, view looking southward near center of south line of sec. 9, T.12 N., R. 7 W. Valencia County, New Mexico. 1932. Plate 10-A, U.S.Geological Survey Professional Paper 189. 1938. #1:/New Mexico-Professional paper 189/hcb00208 ID. Hunt, C.B. 208 V-shaped valley cut in porphyritic andesite, view near the south line of sec. 31, T. 12 N., R. 7 W. The sky line at the head of the valley marks the rim of the amphitheater of Mount Taylor volcano. Valencia County, New Mexico. 1932. Plate 10-B, U.S.Geological Survey Professional Paper 189. 1938. #1:/New Mexico-Professional paper 189/hcb00205 ID. Hunt, C.B. 205 Basaltic lava and cinder cone on the sheet basalt capping Horace Mesa, view in center of sec. 3, T. 11 N., R. 8W. Cibola County, New Mexico. 1932. Plate 12-A, U.S. Geological Survey Professional Paper 189. 1938. #1:/New Mexico-Professional paper 189/hcb00213 ID. Hunt, C.B. 213 Looking southwest toward Seboyeta Peak (Celosa, Cerro de la) the peak is composed of andesitic breccia intruded by andesite dikes, some of which can be seen at the left protruding above the lower park of the neck. Cibola County, New Mexico. 1930. Plate 16-A, U.S.Geological Survey Professional Paper 189. 1938. #1:/New Mexico-Professional paper 189/hcb00215 ID. Hunt, C.B. 215 Xenoliths of sedimentary rock in breccia along east side of Seboyeta Peak (Celosa, Cerro de la), andesite dikes, protruding as dark masses, can be seen at the upper left. Cibola County, New Mexico. 1930. Plate 16-B, U.S.Geological Survey Professional Paper 189. 1938. #1:/New Mexico-Professional paper 189/hcb00232 ID. Hunt, C.B. 232 Xenolith of fossiliferous Cretaceous sandstone in basaltic breccia: in neck of Gonzales Canyon. Sandoval County, New Mexico. 1930. Plate 14-B, with graphics, U.S. Geological Survey Professional Paper 189. 1938. #1:/New Mexico-Professional paper 189/hcb00236 ID. Hunt, C.B. 236 Volcanic neck east of La Abra de Los Cerros, view looking east. The country rock is Cretaceous shale. There is a vertical contact between the shale and the banded basaltic breccia that dips into the neck. Irregular masses of andesite or basalt with columnar jointing intrude the breccia. Sandoval County, New Mexico. 1930. Plate 14-A, with graphics, U.S. Geological Survey Professional Paper 189. 1938. #1:/New Mexico-Professional paper 189/hcb00239 ID. Hunt, C.B. 239 Looking northeast from top of volcanic neck east of La Bra de Los Cerros, Cabezon Peak (right) is composed almost wholly of basalt. Cerro Chato (left) is mostly basaltic breccia. Road in foreground serves as scale for nearly buttes of Cretaceous shale. Sandoval County, New Mexico. 1930. Plate 12-B, U.S. Geological Survey Professional Paper 189. 1938. #1:/New Mexico-Professional paper 189/hcb00244 ID. Hunt, C.B. 244 Closer view of south side of Cabezon Peak, showing fairly uniform vertical columns capped with a layer of scoriaceous basalt at the top of the neck. Sandoval County, New Mexico. 1930. Plate 13-B, U.S. Geological Survey Professional Paper 189. 1938. #1:/New Mexico-Professional paper 189/hcb00251 ID. Hunt, C.B. 251 Looking south from Cerro de Los Cuates, the mesa across the Rio Puerco is capped with Cretaceous sandstone. Sandoval County, New Mexico. 1930. Plate 12-C, U.S. Geological Survey Professional Paper 189. 1938. #1:/New Mexico-Professional paper 189/hcb00260 ID. Hunt, C.B. 260 Basaltic lava in Santa Fe formation tilted and broken by a small fault, view along New Mexico Highway 6 in sec. 2, T. 9 N., R. 1 W. Tsf, Santa Fe formation; Tb, basaltic lava. Bernalillo County, New Mexico. 1931. Plate 19-B, with graphic, U.S.Geological Survey Professional Paper 189. 1938. #1:/New Mexico-Professional paper 189/hcb00265 ID. Hunt, C.B. 265 Angular unconformity between Santa Fe formation and underlying Cretaceous rocks, the Santa Fe dips 10 degrees S, 20 degrees W; the Cretaceous rocks dip 18 degrees S, 50 degrees E: view look south in center of sec. 3, T. 14 N., R. 1 E. Sandoval County, New Mexico. 1930. Plate 17-C, with graphics, U.S.Geological Survey Professional Paper 189. 1938. #1:/New Mexico-Professional paper 189/hcb00266 ID. Hunt, C.B. 266 Angular unconformity between Santa Fe formation and underlying Cretaceous rocks, the Santa Fe dips 7 degrees S, 20 degrees W; the Cretaceous rocks dip 30 degrees S: view looking east in center of sec. 4, T. 14 N. R. 1 E. Sandoval County, New Mexico. 1930. Plate 17-D, with graphics, U.S.Geological Survey Professional Paper 189. 1938. #1:/New Mexico-Professional paper 189/hcb00271 ID. Hunt, C.B. 271 Banded basaltic breccia lying at outer contact of a large breccia mass, the banded breccia dips into the mass; in sec. 19, T. 19 N., R. 4 W. Sandoval County, New Mexico. 1930. Plate 17-B, U.S.Geological Survey Professional Paper 189. 1938. #1:/North Dakota- Professional paper 189/brw00010 ID. Brown, R.W. 10 The Colgate member of the Fox Hills sandstone and Hell Creek formation in southwestern North Dakota: Hell Creek formation north of the station of the Chicago, Milwaukee, St. Paul & Pacific Railroad at Marmarth, Slope County, North Dakota. 1936. Plate 47-C, U.S.Geological Survey Professional Paper 189. 1938. #1:/New Mexico-Professional paper 193/dnh00878 ID. Darton, N.H. 878 Lower members of Mesaverde formation in eastern part of Gallup coal district, as named in U.S. Bulletin 767; view of the hogback 2.5 miles northeast of Gallup. McKinley County, New Mexico. 1901. Plate 27-B, U.S.Geological Survey Professional Paper 193. 1941. Plate 7, U.S.Geological Survey Bulletin 860. 1934. #1:/New Mexico-Professional paper 193/sjd00154 ID. Sears, J.D. 154 Intertonguing of Mancos shale and Gallup sandstone member of Mesaverde formation. Foreground and lower slope, main body of Mancos; bench a sandstone wedge from the Gallup, thinning eastward (toward the right); upper slope, a tongue of Mancos thinning westwards; cliff, main body of Gallup sandstone member. McKinley County, New Mexico. 1930. A small portion of photo 154 (left) and all of photo 155 is plate 28-B, U.S.Geological Survey Professional Paper 193. 1941. #1:/New Mexico-Professional paper 193/sjd00157 ID. Sears, J.D. 157 Upper part of Mancos shale and basal sandstones of Mesaverde formation, near north end of the hogback north of Gallup, the top of the Gryphaea newberryi zone is at the right. This is photo 157 and 158 composed as one. McKinley County, New Mexico. 1930. Plate 27-A, U.S.Geological Survey Professional Paper 193. 1941. #1:/New Mexico-Professional paper 193/sjd00176 ID. Sears, J.D. 176 Gibson coal member of Mesaverde formation west of (landward from) area in which it is split by the Hosta sandstone member; view in T.17 N., R. 17 W. McKinley County, New Mexico. 1929. Plate 29-C, U.S.Geological Survey Professional Paper 193. 1941. #1:/New Mexico-Professional paper 193/sjd00184 ID. Sears, J.D. 184 Hosta sandstone member of Mesaverde formation, showing mode of weathering of upper part: view in sec. 4, T. 17 N., R. 16 W. McKinley County, New Mexico. 1930. Plate 31-C. U.S.Geological Survey Professional Paper 193. 1941. #1:/New Mexico-Professional paper 193/sjd00203 ID. Sears, J.D. 203 Hosta sandstone member of Mesaverde formation split by Satan tongue of Mancos shale; upper two ledges of sandstone are the Hosta; intervening shale is the Satan tongue; intermediate slope, lower part of Gibson coal member; sandstones in foreground, the Dalton sandstone member, view looking west at north end of Satan Pass, southeast of Crown Point. McKinley County, New Mexico. 1930. Plate 28-C, U.S.Geological Survey Professional Paper 193. 1941. #1:/New Mexico-Professional paper 193/sjd00226 ID. Sears, J.D. 226 Mulatto tongue of Mancos shale overlain by Dalton sandstone member of Mesaverde formation, in foreground, the top of the "Stray sandstone". View in sec. 30, T. 15 N., R. 10 W. At this locality the Mulatto is about 250 feet thick. Through the combined effects of topographic slope, dip of beds, and foreshortening, the photograph greatly exaggerates the apparent thickness of the lower, rather sandy portion of the Mulatto, which extends as far up the tree covered bench at the left, as contrasted with the partly hidden upper, less sandy portion of the Mulatto. McKinley County, New Mexico. 1930. Plate 28-A, U.S.Geological Survey Professional Paper 193. 1941. #1:/New Mexico-Professional paper 193/sjd00240 ID. Sears, J.D. 240 Transition zone marking contact between Mulatto tongue of Mancos shale and overlying Dalton sandstone member of Mesaverde formation: view on east side of Satan Pass in sec. 20, T. 16 N., R. 12 W. McKinley County, New Mexico. 1930. Plate 31-B. U.S.Geological Survey Professional Paper 193. 1941 #1:/New Mexico-Professional paper 193/hcb00010 ID. Hunt, C.B. 10 Intertonguing of Ostrea soleniscus marl with layers of the "Stray sandstone". The marl is composed largely of Ostrea soleniscus: The bed sandstone contains only scattered remains of the elongated oyster. View in sec. 9, T.14 N., R.9 W. Photo by, J.D. Sears. McKinley County, New Mexico. 1930. Plate 30-C U.S.Geological Survey Professional Paper 193. 1941. #1:/New Mexico-Professional paper 193/hcb00011 ID. Hunt, C.B. 11 Closer view of the outcrop shown in photo 10: Photo by, J.D. Sears. McKinley County, New Mexico. 1930. Plate 30-B, U.S.Geological Survey Professional Paper 193. 1941. #1:/New Mexico-Professional paper 193/hcb00012 ID. Hunt, C.B. 12 Sandy marl composed largely of Ostrea solenis, the indicated specimen is 18 inches long. Photo by, J.D. Sears. McKinley County, New Mexico. 1930. Plate 30-A, U.S.Geological Survey Professional Paper 193. 1941. #1:/New Mexico-Professional paper 193/hcb00013 ID. Hunt, C.B. 13 Polygonal jointing in upper part of Gallup sandstone member: closer view at the locality in photo 14. Photo by, J.D. Sears. McKinley County, New Mexico. 1930. Plate 29-B, U.S.Geological Survey Professional Paper 193. 1941. #1:/New Mexico-Professional paper 193/hcb00014 ID. Hunt, C.B. 14 Gallup sandstone member of Mesaverde formation, showing mode of weathering: sec. 16, T. 14 N., R. 9 W. Photo by, J.D. Sears. McKinley County, New Mexico. 1930. Plate 29-A, U.S.Geological Survey Professional Paper 193. 1941. #1:/California-Professional paper 195/wwp00139 ID. Woodring, W.P. 139 Neverita and Pecten zones of San Joaquin formation: Neverita zone at type locality on east side of Arroyo Bifido, sec. 35, T. 21 S., R 17 E. Basal sandstone and lower part of overlying sand form low cliff under derrick on skyline. Kings County, California. 1930. Plate 18-A, U.S.Geological Survey Professional Paper 195. 1940. #1:/California-Professional paper 195/wwp00140 ID. Woodring, W.P. 140 Neverita and Pecten zones of San Joaquin formation: Neverita zone on east side of branch of Arroyo Largo in western part of sec. 3, T. 22 S., R. 17 E. Basal sandstone forms low cliff; overlying sand extends to top of ridge. Kings County, California. 1930. Plate 18-B, U.S.Geological Survey Professional Paper 195. 1940. #1:/California-Professional paper 195/wwp00142 ID. Woodring, W.P. 142 Sandstone and sand in San Joaquin and Etchegoin formations of North Dome: Sandstone and cross-bedded sand of San Joaquin formation on branch of Arroyo Largo at north line of sec. 34, T. 21 S., R. 17 E: Photo by K.E. Lohman. Fresno County, California. 1930. Plate 17-A, U.S.Geological Survey Professional Paper 195. 1940. #1:/California-Professional paper 195/wwp00143 ID. Woodring, W.P. 143 Sandstone and sand in San Joaquin and Etchegoin formations of North Dome: Sandstone of San Joaquin formation riddled with borings; excavation at Standard Well 21-33J, sec. 33, T. 21 S., R. 17 E: Photo by K.E. Lohman. Fresno County, California. 1930. Plate 17- B, U.S.Geological Survey Professional Paper 195. 1940. #1:/California-Professional paper 195/wwp00144 ID. Woodring, W.P. 144 Sandstone and sand in San Joaquin and Etchegoin formations of North Dome: Second MYA layer above Littorina zone of Etchegoin formation on road northwest of Double Hill in sec. 2, T. 22 S., R. 17 E: Photo by K.E. Lohman. Kings County, California. 1930. Plate 17-C, U.S.Geological Survey Professional Paper 195. 1940. #1:/California-Professional paper 195/wwp00145 ID. Woodring, W.P. 145 Strata in Etchegoin formation of North Dome: Barnacle reef underlying Patinopecten zone on south slope of El Tolete, sec. 7, T. 22 S., R. 18 E. Photo by K.E. Lohman. Kings County, California. 1930. Plate 27-A, U.S.Geological Survey Professional Paper 195. 1940. #1:/California-Professional paper 195/stew0001 ID. Stewart, R. 1 Neverita and Pecten zones of San Joaquin formation: View on west flank of South Dome looking northward from south line of sec. 20, T. 24 S., R. 19 E. The narrow white band marks the outcrop of thin bed of limestone immediately underlying the Pecten zone. Kings County, California. 1930. Plate 18-C, U.S.Geological Survey Professional Paper 195. 1940. #1:/California-Professional paper 195/stew0002 ID. Stewart, R. 2 Strata in lower part of San Joaquin formation and upper part of Etchegoin formation of North Dome: Blue sandstone of Cascajo conglomerate member of San Joaquin formation cutting across first blue sandstone of underlying Etchegoin formation at head of Arroyo Delgado on west side of Cerro Alto, sec. 28, T. 22 S., R. 18 E; Cascajo conglomerate to the left and First blue sandstone to right. Kings County, California. 1931. Plate 25-B, U.S.Geological Survey Professional Paper 195. 1940. #1:/California-Professional paper 195/stew0003 ID. Stewart, R. 3 Strata in lower part of San Joaquin formation and upper part of Etchegoin formation of North Dome: Type locality of Littorina zone of Etchegoin formation at El Paso, on west side of La Cima, sec. 19, T. 22 S., R. 18 E. In descending order from left to right; First blue sandstone, First MYA layer, Littorina zone; with fault trace between the last two. The first Mya layer and first blue sandstone are normally about 100 feet above the Littorina zone. Kings County, California. 1931. Plate 25-C, U.S.Geological Survey Professional Paper 195. 1940. #1:/California-Professional paper 195/stew0004 ID. Stewart, R. 4 Strata in Etchegoin formation of North Dome: looking northeastward toward El Rascador, in sec. 17, T. 22 S., R. 18 E. In descending order from center high point; Cascajo conglomerate member of San Joaquin, Littorina zone, mytilus layer in siphonalia zone, tuffaceous sand of Macoma zone. Kings County, California. 1931. Plate 26-A, U.S.Geological Survey Professional Paper 195. 1940. #1:/California-Professional paper 195/stew0007 ID. Stewart, R. 7 Strata in Etchegoin formation of North Dome: Irregular bedding in siphonalla zone on Arroyo Estrecho, SW ¼ sec. 35, T. 22 S., R. 18 E., from top to bottom; massive sandstone, mytilus layer, sandy silt. Kings County, California. 1931. Plate 27-B, U.S.Geological Survey Professional Paper 195. 1940. #1:/California-Professional paper 195/stew0008 ID. Stewart, R. 8 Strata in Etchegoin formation of North Dome: Pseudocardium in irregularly bedded silt in upper part of siphonalia zone on north side of Arroyo Pino, SE ¼ sec. 26, T. 22 S., R. 18 E. Kings County, California. 1931. Plate 27-C, U.S.Geological Survey Professional Paper 195. 1940. #1:/California-Professional paper 195/stew0009 ID. Stewart, R. 9 Physiographic and structural features in North Dome: Erosion surface viewed from the northwest at El Prado, sec. 32, T. 21 S., R. 17 E. the surface truncates tilted strata in the upper part of the San Joaquin formation. Fresno County, California. 1932. Plate 53-A, U.S.Geological Survey Professional Paper 195. 1940. #1:/California-Professional paper 195/stew0010 ID. Stewart, R. 10 Physiographic and structural features in North Dome: Erosion surface viewed from the southeast at La Palomera, sec. 16, T. 22 S., R. 18 E., the surface truncates tilted strata in the lower part of the San Joaquin formation. Kings County, California. 1932. Plate 53- B, U.S.Geological Survey Professional Paper 195. 1940. #1:/California-Professional paper 195/stew0011 ID. Stewart, R. 11 Physiographic and structural features in North Dome: Joints practically parallel to fault plane (to left of hammer) in cross-bedded blue sandstone on northwest ridge of El Tolete, sec. 7, T. 22 S., R. 18 E. Kings County, California. 1932. Plate 53-C, U.S.Geological Survey Professional Paper 195. 1940. #1:/New Mexico-Professional paper 200/lgf00157 ID. Loughlin, G.F. 157 Form a panorama of Kelly, Magdalena Mountains and Elephant Butte, look west from dump of Juanita Tunnel. Magdalena Mountain in right middle ground is also called Picture Mountain because the round patch of talus surrounded by brush on the northeast slope resembles a human head. The mountain is capped with pink rhyolite, which merges into the dike that forms the high cliff on the east slope. The dike strikes north parallel to the plane of the picture. The horizontal layers to the left of the dike represent the glassy top of the upper andesite. The same formations constitute Elephant Butte, on the extreme left and the hill in the southwest corner of the district (photos 182 and 183). The low mounds in the valley between Magdalena Mountain and Elephant Butte are remnants of pediments equivalent to lower pediments with the district. Socorro County, New Mexico. July 1915. Plate 2-A, in U.S.Geological Survey Professional Paper 200. 1942. #1:/New Mexico-Professional paper 200/lgf00158 ID. Loughlin, G.F. 158 Form a panorama of Kelly, Magdalena Mountains and Elephant Butte, look west from dump of Juanita Tunnel. Magdalena Mountain in right middle ground is also called Picture Mountain because the round patch of talus surrounded by brush on the northeast slope resembles a human head. The mountain is capped with pink rhyolite, which merges into the dike that forms the high cliff on the east slope. The dike strikes north parallel to the plane of the picture. The horizontal layers to the left of the dike represent the glassy top of the upper andesite. The same formations constitute Elephant Butte, on the extreme left and the hill in the southwest corner of the district (photos 182 and 183). The low mounds in the valley between Magdalena Mountain and Elephant Butte are remnants of pediments equivalent to lower pediments with the district. Socorro County, New Mexico. July 1915. Plate 2-A, in U.S.Geological Survey Professional Paper 200. 1942. #1:/New Mexico-Professional paper 200/lgf00159 ID. Loughlin, G.F. 159 Form a panorama of surface plant of Kelly mine in 1916, looking north. Traylor shaft in left foreground; ore bin and dump of Kelly tunnel in right foreground. High slope on left is capped with cliff forming beds of Madera limestone. Lower quartzite member of Sandia formation crops out above ore bin on extreme right. Level-topped central area represents pediment F. Socorro County, New Mexico. Plate 35, in U.S.Geological Survey Professional Paper 200. 1942. #1:/New Mexico-Professional paper 200/lgf00160 ID. Loughlin, G.F. 160 Form a panorama of surface plant of Kelly mine in 1916, looking north. Traylor shaft in left foreground; ore bin and dump of Kelly tunnel in right foreground. High slope on left is capped with cliff forming beds of Madera limestone. Lower quartzite member of Sandia formation crops out above ore bin on extreme right. Level-topped central area represents pediment F. Socorro County, New Mexico. Plate 35, in U.S.Geological Survey Professional Paper 200. 1942. #1:/New Mexico-Professional paper 200/lgf00182 ID. Loughlin, G.F. 182 Form a panorama of northern part of Magdalena Range, looking east from Magdalena Mountain, shows west sloping spurs and foothills with a broad alluvium covered rock plain or pediment in the foreground. Town of Kelly in center. The apparent tear on the extreme left is on the original photo. Socorro County, New Mexico. November 1916. Plate 2-B, in U.S.Geological Survey Professional Paper 200. 1942. #1:/New Mexico-Professional paper 200/lgf00183 ID. Loughlin, G.F. 183 Form a panorama of northern part of Magdalena Range, looking east from Magdalena Mountain, shows west sloping spurs and foothills with a broad alluvium covered rock plain or pediment in the foreground. Town of Kelly in center. The apparent tear on the extreme left is on the original photo. Socorro County, New Mexico. November 1916. Plate 2-B, in U.S.Geological Survey Professional Paper 200. 1942. #1:/New Mexico-Professional paper 200/lgf00184 ID. Loughlin, G.F. 184 Form a panorama of northern part of Magdalena Range, looking east from Magdalena Mountain, shows west sloping spurs and foothills with a broad alluvium covered rock plain or pediment in the foreground. Town of Kelly in center. The apparent tear on the extreme left is on the original photo. Socorro County, New Mexico. November 1916. Plate 2-B, in U.S.Geological Survey Professional Paper 200. 1942. #1:/New Mexico-Professional paper 200/lgf00186 ID. Loughlin, G.F. 186 Upper Patterson Canyon, looking west; the light colored bench between the upper and lower shaded slopes in the foreground is covered with alluvium and represents pediment D. Socorro County, New Mexico. November 1916. Plate 22-B, in U.S.Geological Survey Professional Paper 200. 1942. #1:/Utah-Professional paper 201/cfc00716 ID. Calkins, F.C. 716 North side of Little Cottonwood Canyon near Superior Gulch, Superior fault zone near middle; tillite and Pre-Cambrian quartzite at left; light-banded cliff at right chiefly Mississippian limestone, overlain by Tintic quartzite above Alta overthrust. Columbus overthrust just below small dark knob on crest. Salt Lake County, Utah. Circa 1936. Plate 7-A, U.S.Geological Survey Professional Paper 201. 1943. #1:/Utah-Professional paper 201/cfc00717 ID. Calkins, F.C. 717 View down Little Cottonwood Canyon from spur above Wasatch Drain tunnel, shows U- shaped section and abrupt steepening of grade. Salt Lake County, Utah. Circa 1936. Plate 2-A, U.S.Geological Survey Professional Paper 201. 1943. #1:/Utah-Professional paper 201/cfc00725 ID. Calkins, F.C. 725 Albion Basin from the north, Devils Castle in middle of skyline, above cliff of Deseret and Madison limestone and Jefferson (?) dolomite. Sugarloaf Mountain, at right, is Tintic quartzite. Silver Fork fault passes to the left of dumps near right-hand edge. Salt Lake County, Utah. Circa 1936. Plate 2-B, U.S.Geological Survey Professional Paper 201. 1943. #1:/Utah-Professional paper 201/cfc00727 ID. Calkins, F.C. 727 Form a panorama of western part of ridge north of Little Cottonwood Creek, from Collins Gulch. Shows Cambrian (?) tillite (dark) at right, Pre-Cambrian strata along most of crest, and quartz monzonite of Little Cottonwood stock on lower part of slope. Dark horizontal lines are fissures. Salt Lake County, Utah. Circa 1936. Plate 6-A, U.S.Geological Survey Professional Paper 201. 1943. #1:/Utah-Professional paper 201/cfc00728 ID. Calkins, F.C. 728 Form a panorama of western part of ridge north of Little Cottonwood Creek, from Collins Gulch. Shows Cambrian (?) tillite (dark) at right, Pre-Cambrian strata along most of crest, and quartz monzonite of Little Cottonwood stock on lower part of slope. Dark horizontal lines are fissures. Salt Lake County, Utah. Circa 1936. Plate 6-A, U.S.Geological Survey Professional Paper 201. 1943. #1:/Utah-Professional paper 201/cfc00744 ID. Calkins, F.C. 744 Across Big Cottonwood Canyon from head of Solitude Fork. In foreground, granodiorite (right) and bleached limestones. In background: Pennsylvanian to Triassic strata with simple structure. Salt Lake County, Utah. Circa 1936. Plate 18-B, U.S.Geological Survey Professional Paper 201. 1943. #1:/Utah-Professional paper 201/cfc00771 ID. Calkins, F.C. 771 Silver Fork fault on Davenport Hill. Breccia of Silver Fork fault slopes down toward the right from the summit of hill and is joined by breccia of Snow fault near lowest dump. Salt Lake County, Utah. Circa 1936. Plate 20-B, U.S.Geological Survey Professional Paper 201. 1943. #1:/Utah-Professional paper 201/cfc00788 ID. Calkins, F.C. 788 Alta overthrust northwest of Montreal Hill, from the saddle, the main fault slopes down toward the right. Smooth fissure a little higher marks a minor parallel fault. Rock above the overthrust is Tintic quartzite; beds below are Ophir shale, with drag folds leaning eastward. Salt Lake County, Utah. Circa 1936. Plate 20-A, U.S.Geological Survey Professional Paper 201. 1943. #1:/Utah-Professional paper 201/cfc00784 ID. Calkins, F.C. 784 Form a panorama of southern part of Reed & Benson ridge, from bench near Monte Cristo mine. Light-colored bands are limestone in Ophir shale, dolomite at top of Maxfield limestone and dolomite at top of Jefferson (?). Block between Superior faults forms ridge in middle distance. Dashed (pencil here) line marks Howland fault. Hill at right is Tintic quartzite, underlain by dark tillite; quartzite in foreground. Salt Lake County, Utah. Circa 1936. Plate 6-B, U.S.Geological Survey Professional Paper 201. 1943. #1:/Utah-Professional paper 201/cfc00785 ID. Calkins, F.C. 785 Form a panorama of southern part of Reed & Benson ridge, from bench near Monte Cristo mine. Light-colored bands are limestone in Ophir shale, dolomite at top of Maxfield limestone and dolomite at top of Jefferson (?). Block between Superior faults forms ridge in middle distance. Dashed (pencil here) line marks Howland fault. Hill at right is Tintic quartzite, underlain by dark tillite; quartzite in foreground. Salt Lake County, Utah. Circa 1936. Plate 6-B, U.S.Geological Survey Professional Paper 201. 1943. #1:/Utah-Professional paper 201/cfc00796 ID. Calkins, F.C. 796 Jefferson (?) dolomite east of Twin Peaks, Maxfield limestone in foreground, base of Madison limestone just below top of knob. Utah County, Utah. Circa 1936. Plate 14-B, U.S.Geological Survey Professional Paper 201. 1943. #1:/Utah-Professional paper 201/cfc00805 ID. Calkins, F.C. 805 Tintic quartzite in cliff west of Pittsburg lake, Twin Peaks in distance. Utah County, Utah. Circa 1936. Plate 8-A, U.S.Geological Survey Professional Paper 201. 1943. #1:/Utah-Professional paper 201/cfc00828 ID. Calkins, F.C. 828 Limestone member of Ophir shale, east of Superior Gulch: siliceous laminae conspicuous in ledge at top of member, and faintly visible below. Salt Lake County, Utah. Circa 1936. Plate 8-B, U.S.Geological Survey Professional Paper 201. 1943. #1:/Utah-Professional paper 201/cfc00833 ID. Calkins, F.C. 833 "Guinea Hen" dolomite in Maxfield limestone, overlain by white dolomite at top of middle member, outcrop west of Flagstaff mine. Salt Lake County, Utah. Circa 1936. Plate 12-B, U.S.Geological Survey Professional Paper 201. 1943. #1:/Utah-Professional paper 201/cfc00838 ID. Calkins, F.C. 838 Shale and limestone in middle member of Maxfield limestone outcrop on west slope of Reed and Benson Ridge. Salt Lake County, Utah. Circa 1936. Plate 12-A, U.S.Geological Survey Professional Paper 201. 1943. #1:/Utah-Professional paper 201/cfc00847 ID. Calkins, F.C. 847 Contact of quartz diorite (Clayton Peak stock) and granodiorite (Alta stock), near Big Cottonwood mine, south of Brighton. Shows wedge shaped mass of diorite in middle, enclosed in lighter colored granodiorite, which is pegmatitic at left. Salt Lake County, Utah. Circa 1936. Plate 16-A, U.S.Geological Survey Professional Paper 201. 1943. #1:/Utah-Professional paper 201/cfc00865 ID. Calkins, F.C. 865 Worm-like bodies in Ophir shale; specimen from lower shale member, Reed and Benson ridge: Natural size. Salt Lake County, Utah. Circa 1936. Plate 9, U.S.Geological Survey Professional Paper 201. 1943. #1:/Utah-Professional paper 201/cfc00867 ID. Calkins, F.C. 867 Oolitic texture in Maxfield limestone, specimen from near base; enlarged 1.5 x. Utah. Circa 1936. Plate 10-A, U.S.Geological Survey Professional Paper 201. 1943. #1:/Utah-Professional paper 201/cfc00871 ID. Calkins, F.C. 871 "Guinea-Hen" dolomite in Maxfield limestone, specimen from upper part of lower member; enlarged 1.5 x. Utah. Circa 1936. Plate 11-A, U.S.Geological Survey Professional Paper 201. 1943. #1:/Utah-Professional paper 201/cfc00874 ID. Calkins, F.C. 874 White dolomite in Maxfield limestone forms top of middle member, slightly enlarged. Utah. Circa 1936. Plate 13-A, U.S.Geological Survey Professional Paper 201. 1943. #1:/Utah-Professional paper 201/cfc00876 ID. Calkins, F.C. 876 Twig like bodies in Maxfield limestone, specimen from lower part of middle member; slightly reduced. From below Kennebeg, Reed and Benson Ridge. Salt Lake County, Utah. Circa 1936. Plate 10-B, U.S.Geological Survey Professional Paper 201. 1943. #1:/Utah-Professional paper 201/cfc00879 ID. Calkins, F.C. 879 Intraformational limestone conglomerate in Maxfield limestone, specimen from middle member: natural size. Reed and Benson Ridge. Salt Lake County, Utah. Circa 1936. Plate 13-B, U.S.Geological Survey Professional Paper 201. 1943. #1:/Utah-Professional paper 201/cfc00880 ID. Calkins, F.C. 880 Shale with limestone nodules, middle member of Maxfield limestone, from Tom tunnel; enlarged 1.5 times. Utah. Circa 1936. Plate 11-B, U.S.Geological Survey Professional Paper 201. 1943. #1:/Utah-Professional paper 201/cfc00882 ID. Calkins, F.C. 882 Fine grained whitish dolomite forming top of dolomite; specimen shows characteristic minute jointing; enlarged 1.25 x. Utah. Circa 1936. Plate 14-A, U.S.Geological Survey Professional Paper 201. 1943. #1:/Utah-Professional paper 201/cfc00887 ID. Calkins, F.C. 887 Metamorphosed nodule of chert from Deseret limestone; contains much tremolite, natural size. Utah. Circa 1936. Plate 15-A, U.S.Geological Survey Professional Paper 201. 1943. #1:/Utah-Professional paper 201/cfc00889 ID. Calkins, F.C. 889 Metamorphosed dolomite with forsterite, specimen collected near Grizzly tunnel; slightly reduced. Salt Lake County, Utah. Circa 1936. Plate 21-C, U.S.Geological Survey Professional Paper 201. 1943. #1:/Utah-Professional paper 201/cfc00891 ID. Calkins, F.C. 891 Weathered brucite bearing Mississippian limestone: specimen from slope north of Lake Solitude; slightly reduced. Salt Lake County, Utah. Circa 1936. Plate 21-B, U.S.Geological Survey Professional Paper 201. 1943. #1:/Utah-Professional paper 201/cfc00892 ID. Calkins, F.C. 892 Metamorphosed Maxfield limestone with garnet, specimen from middle member, cropping out on slope at head of Grizzly Gulch; slightly reduced. Salt Lake County, Utah. Circa 1936. Plate 21-A, U.S.Geological Survey Professional Paper 201. 1943. #1:/Utah-Professional paper 201/cfc00893 ID. Calkins, F.C. 893 Quartz diorite from Clayton Peak stock at head of Big Cottonwood Creek, pitted appearance is deceptive. Dark specks are mainly hornblende and biotite. Slightly enlarged. Salt Lake County, Utah. Circa 1936. Plate 15-B, U.S.Geological Survey Professional Paper 201. 1943. #1:/Utah-Professional paper 201/cfc00894 ID. Calkins, F.C. 894 Partly altered diorite porphyry from offshoot of Clayton Peak stock, specimen collected near Lake Solitude. Dark parts are almost unaltered, natural size. Salt Lake County, Utah. Circa 1936. Plate 17-C, U.S.Geological Survey Professional Paper 201. 1943. #1:/Utah-Professional paper 201/cfc00895 ID. Calkins, F.C. 895 Highly metamorphosed diorite porphyry, from slope near Michigan-Utah mine. Large dark areas mainly garnet; remainder mainly anorthite; with grains of diopside in relief. Natural size. Utah. Circa 1936. Plate 16-B, U.S.Geological Survey Professional Paper 201. 1943. #1:/Utah-Professional paper 201/cfc00896 ID. Calkins, F.C. 896 Granodiorite of Alta stock: analyzed specimen from dump of Steamboat tunnel, note conspicuous prisms of hornblende; natural size. Utah. Circa 1936. Plate 17-B, U.S.Geological Survey Professional Paper 201. 1943. #1:/Utah-Professional paper 201/cfc00898 ID. Calkins, F.C. 898 Quartz monzonite of Little Cottonwood stock, from Gad Valley; shows ill-defined phenocrysts of orthoclase, slightly reduced. Salt Lake County, Utah. Circa 1936. Plate 17-A, U.S.Geological Survey Professional Paper 201. 1943. #1:/Utah-Professional paper 201/cfc00900 ID. Calkins, F.C. 900 Alaskite porphyry of Grizzly dike, specimen collected near Grizzly tunnel, shows phenocrysts of quartz (dark) and feldspar (light): natural size. Utah. Circa 1936. Plate 18-A, U.S.Geological Survey Professional Paper 201. 1943. #1:/Utah-Professional paper 201/bbs00141 ID. Butler, B.S. 141 Tillite blocks in talus at head of Mill D South Fork. Slab of varved shale at left, boulders mainly quartzite; some are granite and a few, partly dissolved out, are limestone. Salt Lake County, Utah. Circa 1920. Plate 7-B, U.S.Geological Survey Professional Paper 201. 1943. #1:/Utah-Professional paper 201/bbs00149 ID. Butler, B.S. 149 Mineralized limestone breccia, no. 1 shoot, South Hecla mine, about half natural size. Utah. Circa 1920. Plate 43-B, U.S.Geological Survey Professional Paper 201. 1943. #1:/Washington-Professional paper 202/pcf00127 ID. Park, C.F. 127 Contorted phyllite in Priest River group; road cut east of Pass Creek Pass. Pend Oreille County, Washington. 1937. Plate 2-A, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00138 ID. Park, C.F. 138 Shedroof conglomerate on ridge between Hall Mountain and Grassy Top Mountain, note the large patch of limestone in lower right; hammer handle is 18 inches long. Pend Oreille County, Washington. 1936. Plate 2-B, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00111 ID. Park, C.F. 111 Photomicrograph of greenstone of Leola volcanics, Prouty Lookout; remnants of feldspar suggest an earlier diabasic texture. Pend Oreille County, Washington. 1936. Plate 5-A, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00133 ID. Park, C.F. 133 Sheared conglomerate in Gypsy quartzite, slope west of Oriole mine. Pend Oreille County, Washington. 1936. Plate 5-B, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00086 ID. Park, C.F. 86 Polished slab of Maitlen phyllite, shearing banding is horizontal; banding from top left to bottom right is bedding; from saddle in northwest corner of sec. 35, T. 39 N., R. 42 E., altitude 5,800 feet. Pend Oreille County, Washington. 1937. Plate 6-A, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00108 ID. Park, C.F. 108 Maitlen phyllite, photomicrograph of thin section of rock nearly parallel to face shown in photo 86; schistosity (bedding?) is cut by fracture cleavage (shear banding): enlarged 35 x. Pend Oreille County, Washington. 1937. Plate 6-B, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00087 ID. Park, C.F. 87 Polished surface cut normal to dominate foliation and bedding, of Maitlen phyllite; north center of sec. 23, T. 39 N., R. 42 E., altitude 5,950 feet. Pend Oreille County, Washington. 1937. Plate 6-C, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00079 ID. Park, C.F. 79 Metaline limestone, polished fragment of split drill core, 140 feet below Ledbetter slate, Pend Oreille mine. Pend Oreille County, Washington. 1937. Plate 8-A, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00129 ID. Park, C.F. 129 Black and light colored dolomite, north sIDe of Crescent Lake; note the resIDual black remnant in the light dolomite above the hat. Pend Oreille County, Washington. 1937. Plate 9-A, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00085 ID. Park, C.F. 85 Algae in lower part of Metaline limestone, road cut east of upper Lehigh quarry. Pend Oreille County, Washington. 1937. Plate 9-B, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00084 ID. Park, C.F. 84 Devonian limestone breccia: from northwest corner of sec. 15, T. 40 N., R. 43 E. Pend Oreille County, Washington. 1937. Plate 10-A, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00069 ID. Park, C.F. 69 Intraformational dolomite breccia: from road cut in SW ¼ sec. 11, T. 40 N., R. 42 E. Pend Oreille County, Washington. 1937. Plate 10-B, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00068 ID. Park, C.F. 68 Intraformational dolomite breccia: eighty feet east of outcrop in photo 69. Pend Oreille County, Washington. 1937. Plate 10-C, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00072 ID. Park, C.F. 72 Polished slab of porphyritic facies of the Kaniksu batholith: south center of sec. 21, T. 35 N., R. 45 E. Pend Oreille County, Washington. 1936. Plate 12-A, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00115 ID. Park, C.F. 115 Photomicrograph of a thin section from Granite Peak Lookout, interpreted as showing biotite altered to muscovite; enlarged 125 x. Pend Oreille County, Washington. 1936. Plate 13-A, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00107 ID. Park, C.F. 107 Photomicrograph of dikelet in phyllite, note lack of micaceous minerals parallel to bedding, enlarged 35 x: on Hall Mountain trail from Harvey Creek, altitude 4,000 feet. Pend Oreille County, Washington. 1937. Plate 13-B, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00105 ID. Park, C.F. 105 Photomicrograph of thin section: showing shearing nearly normal to bedding; feldspar on borders and quartz, tourmaline, and muscovite in the center, natural size. Pend Oreille County, Washington. 1936. Plate 13-C, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00131 ID. Park, C.F. 131 Gypsy quartzite west of Flume Creek fault, southwestward from a dolomite knob, at Josephine workings of the Pend Oreille mine; Flume Creek fault passes through the lowlands in the foreground. Pend Oreille County, Washington. 1936. Plate 13-D, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00075 ID. Park, C.F. 75 Specimen of tightly folded Metaline limestone from next to Russian Creek fault, note thickening of the layers at the crests of the folds. Pend Oreille County, Washington. 1937. Plate 14-A, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00132 ID. Park, C.F. 132 Metaline limestone thrust over Ledbetter slate, line of thrust is synonymous with left sIDe of landslide and bottom of cliff. West across the Pend Oreille River from the RiversIDe mine. Pend Oreille County, Washington. 1936. Plate 14-B, with graphic, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00116 ID. Park, C.F. 116 Metaline limestone thrust over Ledbetter slate; river gorge north of Metaline Falls at low water, terrace deposit at upper right. Pend Oreille County, Washington. 1936. Plate 14- C, with graphic, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00134 ID. Park, C.F. 134 Terraces along Pend Oreille River view north from a point about 1mile south of Ione. The road is on the 2,100-foot level, and the 2,500 to 2,600 foot level is the central background. Pend Oreille County, Washington. 1936. Plate 15-A, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00128 ID. Park, C.F. 128 Amphitheaters on east side of Gypsy Ridge, viewed from Salmo Mountain. Pend Oreille County, Washington. 1936. Plate 16-A, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00139 ID. Park, C.F. 139 Paligorskite in cave, 500-foot level, Pend Oreille mine; height of cave about 4 feet, note slickenside wall on right. Pend Oreille County, Washington. 1936. Plate 17-A, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00088 ID. Park, C.F. 88 Specimen of paligorskite from 500-foot level, Pend Oreille mine. Pend Oreille County, Washington. 1936. Plate 17-B, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00089 ID. Park, C.F. 89 Fragments of calcite, jasperoid, ore, and crystalline quartz taken from inside a piece of paligorskite from 300-foot level, Pend Oreille mine. Pieces are numbered left to right, top to bottom, they are; calcite, 6, 9, 10, and 23; jasperoid, 12, 12, 24-26; ore, 4, 8, 22; crystalline quartz. 1-3, 5, 7, 11, 14-2#1: natural size. Pend Oreille County, Washington. 1936. Plate 18, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00073 ID. Park, C.F. 73 Specimen: Hornfels developed in previously folded phyllite, from half a mile west of Stagger Inn camp; altitude 4,400 feet. Pend Oreille County, Washington. 1937. Plate 19- A, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00113 ID. Park, C.F. 113 Photomicrographs of altered carbonate rock, cores of tremolite laths are white diopside; plain light, enlarged 35 x. Pend Oreille County, Washington. 1936. Plate 19-B, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00114 ID. Park, C.F. 114 Photomicrographs of altered carbonate rock, cores of tremolite laths are white diopside; crossed nicols, enlarged 35 x. Pend Oreille County, Washington. 1936. Plate 19-C, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00074 ID. Park, C.F. 74 Specimen of chloritoid schist facies of Maitlen phyllite from about 150 feet above Gypsy quartzite: on hill between Sweet Creek and the South Fork of Flume Creek. Pend Oreille County, Washington. 1937. Plate 20-A, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00106 ID. Park, C.F. 106 Photomicrograph of sillimanite schist, diamond-shaped crystals and fibers are sillimanite: Little Muddy Creek, road west of Ione. Pend Oreille County, Washington. 1936. Plate 20-B, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00110 ID. Park, C.F. 110 Photomicrograph of andalusite grains in mica schist: Hall Mountain ridge, northeast corner of sec. 15, T. 38 N, R. 44 E. Pend Oreille County, Washington. 1937. Plate 20-C, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00112 ID. Park, C.F. 112 Photomicrograph of metamorphosed phyllite; black biotite porphyroblast developed after foliation. The large grain in the upper right hand corner is cordierite. Pend Oreille County, Washington. 1936. Plate 20-D, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00097 ID. Park, C.F. 97 Buttons of anthracite composition in recrystallized dolomitic limestone, Wolf Creek prospect. Pend Oreille County, Washington. 1936. Plate 23-A, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00091 ID. Park, C.F. 91 Silicified and mineralized breccia, light gray is mostly dolomite with a little translucent quartz. Dark gray is jasperoid and ore minerals. Veinlet along lower edge of specimen contains sphalerite in carbonates, Pend Oreille mine. Pend Oreille County, Washington. 1936. Plate 23-B, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00099 ID. Park, C.F. 99 Polished fragment of ore in which galena (black) replaces calcite along cleavage planes, Pend Oreille mine. Pend Oreille County, Washington. 1936. Plate 23-C, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00082 ID. Park, C.F. 82 Crustified banding in dolomite, Lakeview prospect. Pend Oreille County, Washington. 1937. Plate 23-D, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00080 ID. Park, C.F. 80 "Zebra" rock, cobble from stream in east center of sec. 14, T. 40 N., R. 42 E. Pend Oreille County, Washington. 1937. Plate 23-E, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00098 ID. Park, C.F. 98 Partly silicified dolomites, natural size, note the seams of dark gray quartz through the dolomite. Pend Oreille mine. Pend Oreille County, Washington. 1936. Plate 24-B, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00081 ID. Park, C.F. 81 Crudely banded mineralized rock; black is sphalerite, light gray is dolomite, and dark gray is silicified. Lakeview prospect. Pend Oreille County, Washington. 1937. Plate 24- C, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00092 ID. Park, C.F. 92 Polished slab, from Grandview adit; crustified dolomite (light) in jasperoid (dark), the centers of many of the dolomite areas are calcite, natural size. Pend Oreille County, Washington. 1936. Plate 25-A, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00094 ID. Park, C.F. 94 Zinc ore from 500-foot level, Pend Oreille mine; dark gray and black are sphalerite and jasperoid. This specimen contains more milky quartz (white) than most ore, natural size. Pend Oreille County, Washington. 1936. Plate 25-B, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00101 ID. Park, C.F. 101 Slickensided galena, from 700-foot level, Pend Oreille mine: natural size. Pend Oreille County, Washington. 1936. Plate 25-C, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00135 ID. Park, C.F. 135 Post-mineral fault, calcite faulted against ore, in stope, height of face approximately 6 feet; 500-foot level, Pend Oreille mine. Pend Oreille County, Washington. 1936. Plate 25-D, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00077 ID. Park, C.F. 77 Polished surface of specimen of mineralized rock from the Coffin property; serpentine, sphalerite diopside: other minerals not labeled, most serpentine contains cores of sphalerite. Pend Oreille County, Washington. 1937. Plate 27-A, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00100 ID. Park, C.F. 100 Cave breccia, 700-foot level, and natural size. Pend Oreille mine. Pend Oreille County, Washington. 1936. Plate 27-B, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/pcf00136 ID. Park, C.F. 136 Washer and gravel bar: Scherding Placer, looking north. Pend Oreille County, Washington. 1937. Plate 27-B, U.S.Geological Survey Professional Paper 202. 1943. #1:/California-Professional paper 207/kwsw0056 ID. Kew, W.S.W. 56 Altamira member of Monterey Shale: Type locality of Miraleste tuff bed on west side of upper Agua Negra Canyon. Arrows on published photo (near top of ridge) point to base of tuff. Photograph has ink annotations on it that may not apply to this caption. Los Angeles County, California. February 17, 1923. Plate 7-A, U.S.Geological Survey Professional Paper 207. 1946. #1:/California-Professional paper 207/kwsw0058 ID. Kew, W.S.W. 58 Lomita marl in type region at Lomita quarry; note minor faults shown by displacement of dark colored layer of glauconitic sand. The dark colored strata at top of quarry face consist of sand and gravel assigned to San Pedro (?) sand. Los Angeles County, California. 1922. Plate 17-A, U.S.Geological Survey Professional Paper 207. 1946. #1:/California-Professional paper 207/kwsw0060 ID. Kew, W.S.W. 60 Blue-schist sandstone in upper part of Altamira member of Monterey Shale at Point Fermin: west side of Point Fermin. Los Angeles County, California. February 17, 1923. Plate 9-A, U.S.Geological Survey Professional Paper 207. 1946. #1:/California-Professional paper 207/kwsw0066 ID. Kew, W.S.W. 66 Rolling upland along crest of Palos Verdes Hills, head of Altamira Canyon tapping hanging valley shown in photo 74. Photographs 65 and 66 here are composed as one photograph. Los Angeles County, California. 1922. Plate 27-C is a small portion of photo 65, and all of 66, U.S.Geological Survey Professional Paper 207. 1946. #1:/California-Professional paper 207/kwsw0074 ID. Kew, W.S.W. 74 Rolling upland along crest of Palos Verdes Hills, hanging valley at head of Altamira Canyon, lip of valley is in right middle foreground. Contrary to appearance it drains to right. Los Angeles County, California. 1922. Plate 27-B, U.S.Geological Survey Professional Paper 207. 1946. #1:/California-Professional paper 207/kwsw0075 ID. Kew, W.S.W. 75 Rolling upland along crest of Palos Verdes Hills, undrained depression along crest of western part of hills. Los Angeles County, California. 1922. Plate 27-A, U.S.Geological Survey Professional Paper 207. 1946. #1:/California-Professional paper 207/kwsw0088 ID. Kew, W.S.W. 88 Altamira member of Monterey Shale: Local discontinuity or bedding plane fault, foot of sea cliff east of Point Fermin. Los Angeles County, California. 1921. Plate 7-B, U.S.Geological Survey Professional Paper 207. 1946. #1:/California-Professional paper 207/wwp00108 ID. Woodring, W.P. 108 Cabrillo fault at Cabrillo beach, light colored cherty and phosphatic shale of upper part of Altamira member on hanging wall, buff siltstone of middle part of Altamira on footwall. Los Angeles County, California. 1935. Plate 6-D, U.S.Geological Survey Professional Paper 207. 1946. #1:/California-Professional paper 207/wwp00109 ID. Woodring, W.P. 109 Blue-schist sandstone in upper part of Altamira member of Monterey Shale at Point Fermin: East side of Point Fermin. Los Angeles County, California. 1930. Plate 9-B, U.S.Geological Survey Professional Paper 207. 1946. #1:/California-Professional paper 207/wwp00110 ID. Woodring, W.P. 110 Miocene and Pliocene formations: Blue-schist sandstone and brecciated shale in upper part of Altamira member of Monterey Shale, highway cut on west side of Point Fermin. Los Angeles County, California. 1930. Plate 10-B, U.S.Geological Survey Professional Paper 207. 1946. #1:/California-Professional paper 207/wwp00113 ID. Woodring, W.P. 113 Form a panorama of Miocene and Pliocene formations: sea cliff at Malaga Cove, (a) nonmarine terrace cover and dune sand (Pleistocene to Recent), (b) Repetto siltstone (lower Pliocene); (c) Malaga mudstone member of Monterey shale (upper Miocene); (d) Valmonte diatomite member of Monterey shale (upper Miocene). Los Angeles County, California. 1930. Plate 10-A, U.S.Geological Survey Professional Paper 207. 1946. #1:/California-Professional paper 207/wwp00114 ID. Woodring, W.P. 114 Form a panorama of Miocene and Pliocene formations: sea cliff at Malaga Cove, (a) nonmarine terrace cover and dune sand (Pleistocene to Recent), (b) Repetto siltstone (lower Pliocene); (c) Malaga mudstone member of Monterey shale (upper Miocene); (d) Valmonte diatomite member of Monterey shale (upper Miocene). Los Angeles County, California. 1930. Plate 10-A, U.S.Geological Survey Professional Paper 207. 1946. #1:/California-Professional paper 207/wwp00115 ID. Woodring, W.P. 115 Miocene and Pliocene formations: Broken and stretched phosphatic layers (light colored) in laminated diatomite and diatomaceous shale (dark-colored), Valmonte diatomite member of Monterey shale on north limb of southern syncline at Malaga Cove. Los Angeles County, California. 1930. Plate 10-B, U.S.Geological Survey Professional Paper 207. 1946. #1:/California-Professional paper 207/wwp00116 ID. Woodring, W.P. 116 Valmonte diatomite and Malaga mudstone members of Monterey Shale at Malaga Cove: Valmonte diatomite member of Monterey Shale (at right), faulted against Malaga mudstone member (at left). Los Angeles County, California. 1930. Plate 11-B, U.S.Geological Survey Professional Paper 207. 1946. #1:/California-Professional paper 207/wwp00117 ID. Woodring, W.P. 117 Valmonte diatomite and Malaga mudstone members of Monterey Shale at Malaga Cove: Valmonte diatomite member of Monterey Shale overlain by Malaga mudstone member. Los Angeles County, California. 1930. Plate 11-A, U.S.Geological Survey Professional Paper 207. 1946. #1:/California-Professional paper 207/wwp00118 ID. Woodring, W.P. 118 Miocene, Pliocene and Pleistocene formations at Malaga Cove: Near north end of Malaga Cove, (a) dune sand (Recent); (b) nonmarine cover of lowest terrace (upper Pleistocene to Recent); (c) San Pedro (?) sand (lower (?) Pleistocene); (d) massive radiolarian mudstone, Malaga mudstone member of Monterey shale (upper Miocene); (e) laminated diatomite, Malaga mudstone member of Monterey shale (upper Miocene). Los Angeles County, California. 1930. Plate 12-A, U.S.Geological Survey Professional Paper 207. 1946. #1:/California-Professional paper 207/wwp00119 ID. Woodring, W.P. 119 Miocene, Pliocene and Pleistocene formations at Malaga Cove: Near north end of Malaga Cove, (a) dune sand (Recent); (b) nonmarine cover of lowest terrace (upper Pleistocene to Recent); (c) San Pedro (?) sand (lower (?) Pleistocene); (d) massive radiolarian mudstone, Malaga mudstone member of Monterey shale (upper Miocene); (e) laminated diatomite, Malaga mudstone member of Monterey shale (upper Miocene). Los Angeles County, California. 1930. Plate 12-B, U.S.Geological Survey Professional Paper 207. 1946. #1:/California-Professional paper 207/wwp00120 ID. Woodring, W.P. 120 Miocene, Pliocene and Pleistocene formations at Malaga Cove: Repetto siltstone (lower Pliocene) on south limb of northern syncline. Arrow points (on published photo) upper right side of this photo; to lower bed of volcanic ash. Note seated men at foot of cliff, which is 150 feet high. Los Angeles County, California. 1930. Plate 12-C, U.S.Geological Survey Professional Paper 207. 1946. #1:/California-Professional paper 207/wwp00121 ID. Woodring, W.P. 121 Pleistocene formations in San Pedro: Timms Point silt in type region at Timms Point. Los Angeles County, California. 1930. Plate 15-B, U.S.Geological Survey Professional Paper 207. 1946. #1:/California-Professional paper 207/wwp00122 ID. Woodring, W.P. 122 Pleistocene formations in San Pedro: North side of Second Street in block between Pacific Avenue and Mesa Street. Lomita marl conformably overlain by Timms Point silt (on right): both formations unconformably overlain by Palos Verdes sand and nonmarine terrace cover (top). Los Angeles County, California. 1930. Plate 15-A, U.S.Geological Survey Professional Paper 207. 1946. #1:/California-Professional paper 207/wwp00123 ID. Woodring, W.P. 123 Pleistocene formations in San Pedro: San Pedro sand unconformably overlain by Palos Verdes sand and nonmarine terrace cover at southwest corner of Second and Beacon Streets. Los Angeles County, California. 1930. Plate 15-C, U.S.Geological Survey Professional Paper 207. 1946. #1:/California-Professional paper 207/wwp00132 ID. Woodring, W.P. 132 San Pedro sand in Sidebotham No. 1 sand pit. The pit is about 100 feet deep. The little hill has a cap of nonmarine terrace cover. Los Angeles County, California. 1930. Plate 19, U.S.Geological Survey Professional Paper 207. 1946. #1:/California-Professional paper 207/wwp00151 ID. Woodring, W.P. 151 Intrusive basalt a quarter of a mile east of Point Vicente, the basalt shows as dark rock high on cliff. Photo by M.N. Bramlette. Los Angeles County, California. 1933. Plate 6- C, U.S.Geological Survey Professional Paper 207. 1946. #1:/California-Professional paper 207/wwp00153 ID. Woodring, W.P. 153 Lomita marl resting unconformably on Malaga mudstone member of Monterey shale, as exposed in highway cut on south limb of Gaffe anticline; note minor thrust fault along contact, shown by displacement of base of terrace cover. Nonmarine cover of lowest terrace; San Pedro sand; Lomita marl; Malaga mudstone member of Monterey shale. Los Angeles County, California. 1936. Plate 17-B, U.S.Geological Survey Professional Paper 207. 1946. #1:/California-Professional paper 207/kwsw0102 ID. Kew, W.S.W. 102 Pleistocene formation on north border of Palos Verdes Hills: San Pedro sand in Richard Ball sand pit. Los Angeles County, California. October 24, 1923. Plate 20-A, U.S.Geological Survey Professional Paper 207. 1946. #1:/California-Professional paper 207/kwsw0100 ID. Kew, W.S.W. 100 Pleistocene formation on north border of Palos Verdes Hills: Sand pit on west side of Fourth Ravine west of Hawthorne Avenue. Lomita marl, San Pedro sand and unconformably overlying Palo Verdes (?) sand and nonmarine terrace cover. Los Angeles County, California. October 24, 1923. Plate 20-B, U.S.Geological Survey Professional Paper 207. 1946. #1:/California-Professional paper 207/wwp00135 ID. Woodring, W.P. 135 Terrace deposits and structural and Physiographic features of the Palos Verde Hills: Palos Verdes (?) sand and overlying nonmarine terrace cover resting unconformably on Miocene shale in cut on Palos Verdes Drive east, near George F Canyon. Los Angeles County, California. 1930. Plate 24-A, U.S.Geological Survey Professional Paper 207. 1946. #1:/California-Professional paper 207/wwp00107 ID. Woodring, W.P. 107 Terrace deposits and structural and Physiographic features of the Palos Verde Hills: South limb of fan shaped anticline at White Point. Los Angeles County, California. 1930. Plate 24-B, U.S.Geological Survey Professional Paper 207. 1946. #1:/California-Professional paper 207/wwp00137 ID. Woodring, W.P. 137 Terrace deposits and structural and Physiographic features of the Palos Verde Hills: Northward view on west coast showing marine terraces. Fourth terrace in foreground, Fifth and seventh on skyline. Los Angeles County, California. 1930. Plate 24-C, U.S.Geological Survey Professional Paper 207. 1946. #1:/California-Professional paper 207/wwp00152 ID. Woodring, W.P. 152 Terrace deposits and structural and Physiographic features of the Palos Verde Hills: Hanging valley at head Valmonte Canyon. Los Angeles County, California. 1930. Plate 24-D, U.S.Geological Survey Professional Paper 207. 1946. #1:/Arizona-Professional paper 209/gil00004 ID. Gilluly, J. 4 Form a panorama of New Cornelia mine from the south; hills at extreme right hide dumps and valley of the Ajo. Features identified in the background from left to right are: Arkansas Mountain, Cardigan Peak, Camelback Mountain, Greenway residence, Hospital, Ajo, and approach to pit, Concentrator Hill. Pima County, Arizona. February 1934. Plate 2-B, in U.S.Geological Survey Professional Paper 209. 1946. #1:/Arizona-Professional paper 209/gil00005 ID. Gilluly, J. 5 Form a panorama of New Cornelia mine from the south; hills at extreme right hide dumps and valley of the Ajo. Features identified in the background from left to right are: Arkansas Mountain, Cardigan Peak, Camelback Mountain, Greenway residence, Hospital, Ajo, and approach to pit, Concentrator Hill. Pima County, Arizona. February 1934. Plate 2-B, in U.S.Geological Survey Professional Paper 209. 1946. #1:/Arizona-Professional paper 209/gil00006 ID. Gilluly, J. 6 Form a panorama of New Cornelia mine from the south; hills at extreme right hide dumps and valley of the Ajo. Features identified in the background from left to right are: Arkansas Mountain, Cardigan Peak, Camelback Mountain, Greenway residence, Hospital, Ajo, and approach to pit, Concentrator Hill. Pima County, Arizona. February 1934. Plate 2-B, in U.S.Geological Survey Professional Paper 209. 1946. #1:/Arizona-Professional paper 209/gil00007 ID. Gilluly, J. 7 Form a panorama of New Cornelia mine from the south; hills at extreme right hide dumps and valley of the Ajo. Features identified in the background from left to right are: Arkansas Mountain, Cardigan Peak, Camelback Mountain, Greenway residence, Hospital, Ajo, and approach to pit, Concentrator Hill. Pima County, Arizona. February 1934. Plate 2-B, in U.S.Geological Survey Professional Paper 209. 1946. #1:/Arizona-Professional paper 209/gil00008 ID. Gilluly, J. 8 Form a panorama of New Cornelia mine from the south; hills at extreme right hide dumps and valley of the Ajo. Features identified in the background from left to right are: Arkansas Mountain, Cardigan Peak, Camelback Mountain, Greenway residence, Hospital, Ajo, and approach to pit, Concentrator Hill. Pima County, Arizona. February 1934. Plate 2-B, in U.S.Geological Survey Professional Paper 209. 1946. #1:/Arizona-Professional paper 209/gil00009 ID. Gilluly, J. 9 Form a panorama of New Cornelia mine from the south; hills at extreme right hide dumps and valley of the Ajo. Features identified in the background from left to right are: Arkansas Mountain, Cardigan Peak, Camelback Mountain, Greenway residence, Hospital, Ajo, and approach to pit, Concentrator Hill. Pima County, Arizona. February 1934. Plate 2-B, in U.S.Geological Survey Professional Paper 209. 1946. #1:/Arizona-Professional paper 209/gil00010 ID. Gilluly, J. 10 Form a panorama of New Cornelia mine from the south; hills at extreme right hide dumps and valley of the Ajo. Features identified in the background from left to right are: Arkansas Mountain, Cardigan Peak, Camelback Mountain, Greenway residence, Hospital, Ajo, and approach to pit, Concentrator Hill. Pima County, Arizona. February 1934. Plate 2-B, in U.S.Geological Survey Professional Paper 209. 1946. #1:/Arizona-Professional paper 209/gil00011 ID. Gilluly, J. 11 Representative outcrop of Locomotive fanglomerate about 1,000 feet southeast of the open cut of New Cornelia mine. Boulders are composed of monzonite and volcanics (Concentrator volcanics) in reddish matrix of similar material. Hammer is about 18 inches long. Dip is about 60 degrees S. Pima County, Arizona. 1932. Plate 6-A, in U.S.Geological Survey Professional Paper 209. 1946. #1:/Arizona-Professional paper 209/gil00020 ID. Gilluly, J. 20 West from Ajo Peak, hogback ridges in the foreground, light colored western hills of the Little Ajos in the middle ground, and Growler Mountains on the sky line. The hogbacks are Locomotive fanglomerate capped by Ajo volcanics. The lighter hills are Chico Shunie quartz monzonite, with Cardigan gneiss on the lower right hand slopes; pediment along Chico Shunie Arroyo at extreme left middle ground. Pima County, Arizona. 1932. Plate 1-A, in U.S.Geological Survey Professional Paper 209. 1946. #1:/Arizona-Professional paper 209/gil00021 ID. Gilluly, J. 21 Local syncline in Cardigan gneiss; pegmatite dikes just to left of hammer are probably related to Cornelia quartz monzonite. The light bands to the right are quartz diorite injections into a darker diorite base. Hammer is 18 inches long. NW1/2 sec 29, T. 12, S., R. 6 W. Pima County, Arizona. 1932. Plate 4-A, in U.S.Geological Survey Professional Paper 209. 1946. #1:/Arizona-Professional paper 209/gil00027 ID. Gilluly, J. 27 Inclusions of Cardigan gneiss in equigranular facies of Cornelia quartz monzonite at a point about 6 feet from the contact against Cardigan gneiss; contact is to left of outcrop and essentially parallel to the left side of the photograph. Note pocket watch near center; about 1.5 miles west of Gibson Arroyo on south contact (originally roof) of the Cornelia quartz monzonite. Pima County, Arizona. 1932. Plate 5-F, in U.S.Geological Survey Professional Paper 209. 1946. #1:/Arizona-Professional paper 209/gil00033 ID. Gilluly, J. 33 Irregularly foliated gneiss: Gray quartz dioritic nearly massive facies on right transects finer banding at narrow angle. Quartz and quartz-feldspar seams in middle and lower left of specimen are probably partly of replacement origin. Some other seams appear to be true injections. Specimen is about 10 inches wide; northwest of Cardigan. Pima County, Arizona. 1932. Plate 5-B, in U.S.Geological Survey Professional Paper 209. 1946. #1:/Arizona-Professional paper 209/gil00034 ID. Gilluly, J. 34 Contorted injection gneiss of Cardigan gneiss, shows intimate contortions; coin is 2 centimeters in diameter, one mile northwest of Cardigan. Pima County, Arizona. 1932. Plate 4-C, in U.S.Geological Survey Professional Paper 209. 1946. #1:/Arizona-Professional paper 209/gil00035 ID. Gilluly, J. 35 Quartz diorite injections transecting banding of contorted gneiss. The bands are also of quartz diorite and closely resemble the wider dike petrographically. Dark facies of the Cardigan forms the matrix. Coin is 2 centimeters in diameter; one mile north of Cardigan. Pima County, Arizona. 1932. Plate 5-A, in U.S.Geological Survey Professional Paper 209. 1946. #1:/Arizona-Professional paper 209/gil00038 ID. Gilluly, J. 38 Contact between dark facies of Cardigan gneiss and lighter quartz diorite bands. Note the round feldspar in the light band at the bottom, the coarser angular feldspar in the intermediate layer, and the dark facies with discontinuous wider quartz-feldspar bands in the upper part. Some of the feldspar, especially in the middle band is probably due to replacement rather than injection. Block is about 1 foot high. Pima County, Arizona. 1932. Plate 5-C, in U.S.Geological Survey Professional Paper 209. 1946. #1:/Arizona-Professional paper 209/gil00044 ID. Gilluly, J. 44 Thin quartz feldspar seams with notable ptygmatic folding in light facies of Cardigan gneiss. The seams were outlined in pencil before photographing to bring out their structure. In nature they do not possess dark selvages. Coin is 2 centimeters in diameter; north of Cardigan. Pima County, Arizona. 1932. Plate 4-F, in U.S.Geological Survey Professional Paper 209. 1946. #1:/Arizona-Professional paper 209/gil00046 ID. Gilluly, J. 46 Refoliated gneiss: Older foliation brought out by broader light bands (in obscure dark material above hammer) that trend upward and to the left. This is cut and displaced by the horizontal gneissic banding to the left of the hammer, which shows suggestions of displacement of upper layers to the left with respect to the lower layers and cuts them into lenses. This is crystalloblastic cataclastic metamorphism superposed on older crystalloblastic structures. Hammer head is about 8 inches long; one mile north of Chico Shunie village. Pima County, Arizona. 1932. Plate 5-E, in U.S.Geological Survey Professional Paper 209. 1946. #1:/Arizona-Professional paper 209/gil00050 ID. Gilluly, J. 50 Contorted injection gneiss of the Cardigan gneiss. Irregular veins of light quartz diorite gneiss in darker quartz diorite gneiss; pocket knife is 3.5 inches long; near Cardigan. Pima County, Arizona. 1932. Plate 4-B, in U.S.Geological Survey Professional Paper 209. 1946. #1:/Arizona-Professional paper 209/gil00055 ID. Gilluly, J. 55 Contact of well bedded greenish sandstone with overlying fanglomerate of the Locomotive fanglomerate. Note 6-inch monzonite boulder just to left of hammer point. Larger boulder of volcanic breccia is just above. Hammer is 18 inches long. The locality is near the top of the formation, on the east slope of Ajo Peak. Pima County, Arizona. 1932. Plate 6-B, in U.S.Geological Survey Professional Paper 209. 1946. #1:/Arizona-Professional paper 209/gil00057 ID. Gilluly, J. 57 Daniels conglomerate on north side of Daniels Arroyo about 1.5 miles from edge of Ajo quadrangle. The irregular cementation of the conglomerate is evident from its cavernous weathering. Beds dip about 2 degrees to the left. Hammer is 18 inches long. Pima County, Arizona. 1932. Plate 6-C, in U.S.Geological Survey Professional Paper 209. 1946. #1:/Arizona-Professional paper 209/gil00063 ID. Gilluly, J. 63 North base of Little Ajo Mountains and the pediment fronting it, looking northeastward from northwest spur of Little Ajos: Batamote Mountain on sky line at left Pogo Redondo Mountains in the middle sky line. These are lava hills. The light colored hillocks standing above the pediment in the left middle ground are residua of Cornelia quartz monzonite, above the pediment. The valley of the Ajo lies between them and Batamote Mountain. Pima County, Arizona. 1932. Plate 1-B, in U.S.Geological Survey Professional Paper 209. 1946. #1:/Arizona-Professional paper 209/gil00080 ID. Gilluly, J. 80 Black Mountain from the west. Locomotive Rock in the left center, the foreground is pediment carved from Locomotive fanglomerate that dips at 60 to 40 degrees to the right. Black Mountain is fronted by a fault, which cuts it off from these steeply tilted rocks. Pima County, Arizona. 1932. Plate 6-E, in U.S.Geological Survey Professional Paper 209. 1946. #1:/Arizona-Professional paper 209/gil00081 ID. Gilluly, J. 81 View of northeast spur and crest of Black Mountain from the southwest ridge; note massive beds of lava with marked flow boundaries, Valley of the Ajo at right. Pima County, Arizona. 1932. Plate 6-D, in U.S.Geological Survey Professional Paper 209. 1946. #1:/Arizona-Professional paper 209/gil00082 ID. Gilluly, J. 82 Charco at west side of sec. 31, T. 13 S., R. 6 W., near south edge of Ajo quadrangle, the cattle tramped water hole had received no rain for several weeks prior to the time of photographing. Alluvial banks about 2 feet above water, Mesquite trees on both sides. Pima County, Arizona. 1932. Plate 1-F, in U.S.Geological Survey Professional Paper 209. 1946. #1:/Arizona-Professional paper 209/gil00085 ID. Gilluly, J. 85 Black Mountain, behind the unnamed mesa in the middle ground, from a point near the northwest corner of sec. 31, T. 13 S. R. 6 W. Desert pavement in the foreground, with creosote bushed scattered over it. Pima County, Arizona. 1932. Plate 6-F, in U.S.Geological Survey Professional Paper 209. 1946. #1:/Arizona-Professional paper 209/gil00086 ID. Gilluly, J. 86 Form a panorama; aplite dikes on one of the higher spurs in the northwestern part of the Little Ajo Mountains, viewed from the west. The smooth hill slopes ate equigranular Cornelia quartz monzonite. The craggy outcrops are aplite, commonly with blending contacts against the coarser grained rock. The dikes dip steeply to the left (north). Pima County, Arizona. 1932. Plate 1-D, in U.S.Geological Survey Professional Paper 209. 1946. #1:/Arizona-Professional paper 209/gil00087 ID. Gilluly, J. 87 Form a panorama; aplite dikes on one of the higher spurs in the northwestern part of the Little Ajo Mountains, viewed from the west. The smooth hill slopes ate equigranular Cornelia quartz monzonite. The craggy outcrops are aplite, commonly with blending contacts against the coarser grained rock. The dikes dip steeply to the left (north). Pima County, Arizona. 1932. Plate 1-D, in U.S.Geological Survey Professional Paper 209. 1946. #1:/Arizona-Professional paper 209/gil00088 ID. Gilluly, J. 88 Massive monolith of Locomotive fanglomerate forming a bold crag on the northeast face of north Ajo Peak; the formation dips into the peak at about 50 degrees, as shown by the gash near top. Pima County, Arizona. 1932. Plate 1-E, in U.S.Geological Survey Professional Paper 209. 1946. #1:/Arizona-Professional paper 209/gil00094 ID. Gilluly, J. 94 Form a panorama from 2,172 foot hill southwest of Black Mountain. Extreme left is west; shows pediment and alluvial slope in foreground, hill of Cardigan gneiss and Daniels conglomerate overlain by Batamote andesite in middle ground, Growler Mountains on sky line at left. Butte in left center is of Batamote andesite. Pinnacles in left center are Ajo Peaks, with the main mass of the Little Ajos on the sky line to their right. Black Mountain on right center. The ragged hills in the foreground leading toward Black Mountain are of Childs latite. Valley of the Ajo on right: Pozo Redondo Mountains at extreme right. Pima County, Arizona. 1932. Plate 2-A, in U.S.Geological Survey Professional Paper 209. 1946. #1:/Arizona-Professional paper 209/gil00095 ID. Gilluly, J. 95 Form a panorama from 2,172 foot hill southwest of Black Mountain. Extreme left is west; shows pediment and alluvial slope in foreground, hill of Cardigan gneiss and Daniels conglomerate overlain by Batamote andesite in middle ground, Growler Mountains on sky line at left. Butte in left center is of Batamote andesite. Pinnacles in left center are Ajo Peaks, with the main mass of the Little Ajos on the sky line to their right. Black Mountain on right center. The ragged hills in the foreground leading toward Black Mountain are of Childs latite. Valley of the Ajo on right: Pozo Redondo Mountains at extreme right. Pima County, Arizona. 1932. Plate 2-A, in U.S.Geological Survey Professional Paper 209. 1946. #1:/Arizona-Professional paper 209/gil00096 ID. Gilluly, J. 96 Form a panorama from 2,172 foot hill southwest of Black Mountain. Extreme left is west; shows pediment and alluvial slope in foreground, hill of Cardigan gneiss and Daniels conglomerate overlain by Batamote andesite in middle ground, Growler Mountains on sky line at left. Butte in left center is of Batamote andesite. Pinnacles in left center are Ajo Peaks, with the main mass of the Little Ajos on the sky line to their right. Black Mountain on right center. The ragged hills in the foreground leading toward Black Mountain are of Childs latite. Valley of the Ajo on right: Pozo Redondo Mountains at extreme right. Pima County, Arizona. 1932. Plate 2-A, in U.S.Geological Survey Professional Paper 209. 1946. #1:/Arizona-Professional paper 209/gil00097 ID. Gilluly, J. 97 Form a panorama from 2,172 foot hill southwest of Black Mountain. Extreme left is west; shows pediment and alluvial slope in foreground, hill of Cardigan gneiss and Daniels conglomerate overlain by Batamote andesite in middle ground, Growler Mountains on sky line at left. Butte in left center is of Batamote andesite. Pinnacles in left center are Ajo Peaks, with the main mass of the Little Ajos on the sky line to their right. Black Mountain on right center. The ragged hills in the foreground leading toward Black Mountain are of Childs latite. Valley of the Ajo on right: Pozo Redondo Mountains at extreme right. Pima County, Arizona. 1932. Plate 2-A, in U.S.Geological Survey Professional Paper 209. 1946. #1:/Arizona-Professional paper 209/gil00098 ID. Gilluly, J. 98 Form a panorama from 2,172 foot hill southwest of Black Mountain. Extreme left is west; shows pediment and alluvial slope in foreground, hill of Cardigan gneiss and Daniels conglomerate overlain by Batamote andesite in middle ground, Growler Mountains on sky line at left. Butte in left center is of Batamote andesite. Pinnacles in left center are Ajo Peaks, with the main mass of the Little Ajos on the sky line to their right. Black Mountain on right center. The ragged hills in the foreground leading toward Black Mountain are of Childs latite. Valley of the Ajo on right: Pozo Redondo Mountains at extreme right. Pima County, Arizona. 1932. Plate 2-A, in U.S.Geological Survey Professional Paper 209. 1946. #1:/Arizona-Professional paper 209/gil00099 ID. Gilluly, J. 99 Form a panorama from 2,172 foot hill southwest of Black Mountain. Extreme left is west; shows pediment and alluvial slope in foreground, hill of Cardigan gneiss and Daniels conglomerate overlain by Batamote andesite in middle ground, Growler Mountains on sky line at left. Butte in left center is of Batamote andesite. Pinnacles in left center are Ajo Peaks, with the main mass of the Little Ajos on the sky line to their right. Black Mountain on right center. The ragged hills in the foreground leading toward Black Mountain are of Childs latite. Valley of the Ajo on right: Pozo Redondo Mountains at extreme right. Pima County, Arizona. 1932. Plate 2-A, in U.S.Geological Survey Professional Paper 209. 1946. #1:/Arizona-Professional paper 209/gil00100 ID. Gilluly, J. 100 Form a panorama from 2,172 foot hill southwest of Black Mountain. Extreme left is west; shows pediment and alluvial slope in foreground, hill of Cardigan gneiss and Daniels conglomerate overlain by Batamote andesite in middle ground, Growler Mountains on sky line at left. Butte in left center is of Batamote andesite. Pinnacles in left center are Ajo Peaks, with the main mass of the Little Ajos on the sky line to their right. Black Mountain on right center. The ragged hills in the foreground leading toward Black Mountain are of Childs latite. Valley of the Ajo on right: Pozo Redondo Mountains at extreme right. Pima County, Arizona. 1932. Plate 2-A, in U.S.Geological Survey Professional Paper 209. 1946. #1:/Arizona-Professional paper 209/gil00101 ID. Gilluly, J. 101 Form a panorama from 2,172 foot hill southwest of Black Mountain. Extreme left is west; shows pediment and alluvial slope in foreground, hill of Cardigan gneiss and Daniels conglomerate overlain by Batamote andesite in middle ground, Growler Mountains on sky line at left. Butte in left center is of Batamote andesite. Pinnacles in left center are Ajo Peaks, with the main mass of the Little Ajos on the sky line to their right. Black Mountain on right center. The ragged hills in the foreground leading toward Black Mountain are of Childs latite. Valley of the Ajo on right: Pozo Redondo Mountains at extreme right. Pima County, Arizona. 1932. Plate 2-A, in U.S.Geological Survey Professional Paper 209. 1946. #1:/Arizona-Professional paper 209/gil00102 ID. Gilluly, J. 102 Form a panorama from 2,172 foot hill southwest of Black Mountain. Extreme left is west; shows pediment and alluvial slope in foreground, hill of Cardigan gneiss and Daniels conglomerate overlain by Batamote andesite in middle ground, Growler Mountains on sky line at left. Butte in left center is of Batamote andesite. Pinnacles in left center are Ajo Peaks, with the main mass of the Little Ajos on the sky line to their right. Black Mountain on right center. The ragged hills in the foreground leading toward Black Mountain are of Childs latite. Valley of the Ajo on right: Pozo Redondo Mountains at extreme right. Pima County, Arizona. 1932. Plate 2-A, in U.S.Geological Survey Professional Paper 209. 1946. #1:/Arizona-Professional paper 209/gil00103 ID. Gilluly, J. 103 Form a panorama from 2,172 foot hill southwest of Black Mountain. Extreme left is west; shows pediment and alluvial slope in foreground, hill of Cardigan gneiss and Daniels conglomerate overlain by Batamote andesite in middle ground, Growler Mountains on sky line at left. Butte in left center is of Batamote andesite. Pinnacles in left center are Ajo Peaks, with the main mass of the Little Ajos on the sky line to their right. Black Mountain on right center. The ragged hills in the foreground leading toward Black Mountain are of Childs latite. Valley of the Ajo on right: Pozo Redondo Mountains at extreme right. Pima County, Arizona. 1932. Plate 2-A, in U.S.Geological Survey Professional Paper 209. 1946. #1:/Arizona-Professional paper 209/gil00104 ID. Gilluly, J. 104 Form a panorama from 2,172 foot hill southwest of Black Mountain. Extreme left is west; shows pediment and alluvial slope in foreground, hill of Cardigan gneiss and Daniels conglomerate overlain by Batamote andesite in middle ground, Growler Mountains on sky line at left. Butte in left center is of Batamote andesite. Pinnacles in left center are Ajo Peaks, with the main mass of the Little Ajos on the sky line to their right. Black Mountain on right center. The ragged hills in the foreground leading toward Black Mountain are of Childs latite. Valley of the Ajo on right: Pozo Redondo Mountains at extreme right. Pima County, Arizona. 1932. Plate 2-A, in U.S.Geological Survey Professional Paper 209. 1946. #1:/Arizona-Professional paper 209/gil00105 ID. Gilluly, J. 105 Form a panorama from 2,172 foot hill southwest of Black Mountain. Extreme left is west; shows pediment and alluvial slope in foreground, hill of Cardigan gneiss and Daniels conglomerate overlain by Batamote andesite in middle ground, Growler Mountains on sky line at left. Butte in left center is of Batamote andesite. Pinnacles in left center are Ajo Peaks, with the main mass of the Little Ajos on the sky line to their right. Black Mountain on right center. The ragged hills in the foreground leading toward Black Mountain are of Childs latite. Valley of the Ajo on right: Pozo Redondo Mountains at extreme right. Pima County, Arizona. 1932. Plate 2-A, in U.S.Geological Survey Professional Paper 209. 1946. #1:/Arizona-Professional paper 209/gil00108 ID. Gilluly, J. 108 Black Mountain from the northeast; composed of Batamote andesite. Note steep debris slopes below the cliffs and the uneven topography at the base in contrast with the smooth pediment carved on quartz monzonite, shown in photo 63. Pima County, Arizona. 1932. Plate 1-C, in U.S.Geological Survey Professional Paper 209. 1946. #1:/Arizona-Professional paper 209/gil00122 ID. Gilluly, J. 122 Ptygmatic folding in dark faces of Cardigan gneiss, shear surfaces with cataclastic structures (later than the folding) stand horizontally. The coin is 2 centimeters in diameter. Copper Canyon. Pima County, Arizona. 1932. Plate 4-D, in U.S.Geological Survey Professional Paper 209. 1946. #1:/Arizona-Professional paper 209/gil00123 ID. Gilluly, J. 123 Ptygmatic folding of light dioritic seams in dark finer grained facies of Cardigan gneiss. Note that the ptygmatic veins transect the older foliation, marked by thin layers of dark and light minerals. Pima County, Arizona. 1932. Plate 4-E, in U.S.Geological Survey Professional Paper 209. 1946. #1:/Arizona-Professional paper 209/gil00127 ID. Gilluly, J. 127 Refoliated (polymetamorphic) gneiss: Note the older gneissic banding (with some swells probably due to replacement) cut by and dragged along the new shear surfaces trending from lower left to upper right. "Umfaltungsclivage." one mile north of Chico Shunie village. Pima County, Arizona. 1932. Plate 5-D, in U.S.Geological Survey Professional Paper 209. 1946. #1:/California-Professional paper 212/bmn00001 ID. Bramlette, M.N. 1 Close folding of the thin-bedded siliceous rocks of the Monterey formation in sea cliffs about 3 miles northwest of Pismo, San Luis Obispo County, California. 1931. Plate 4-A, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00002 ID. Bramlette, M.N. 2 Crest of small fold in the thin-bedded Monterey formation in road cut on Soto Street, north of Alhambra Avenue, Los Angeles. Los Angeles County, California. 1931. Plate 4-B, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00003 ID. Bramlette, M.N. 3 Quarry of particular strata in the diatomite quarry of the Johns-Manville Corporation, near Lompoc, Santa Barbara County, California. 1931. Plate 4-C, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00004 ID. Bramlette, M.N. 4 Alternating zones of diatomaceous and cherty rocks, averaging 5 to 10 feet in thickness, entrance road to the diatomite quarry near Lompoc. Santa Barbara County, California. 1931. Plate 4-D, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00005 ID. Bramlette, M.N. 5 Small step faults confined within certain beds in laminated diatomite. Santa Barbara County, California. 1931. Plate 5-A, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00006 ID. Bramlette, M.N. 6 Low angle faults in laminated diatomite: in Lompoc quarry. Santa Barbara County, California. 1931. Plate 5-B, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00007 ID. Bramlette, M.N. 7 Volcanic ash beds showing small drag fold in laminated diatomite. Santa Barbara County, California. 1931. Plate 5-C, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00008 ID. Bramlette, M.N. 8 Fine lamination in chert; Chipped edge at right shows dense black opal that is not etched. San Luis Obispo County, California. 1931. Plate 5-D, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00009 ID. Bramlette, M.N. 9 Lateral uniformity of bedding in rhythmically bedded chert. San Luis Obispo County, California. 1931. Plate 6-A, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00010 ID. Bramlette, M.N. 10 Chert beds if irregular thickness, some of which pinch out abruptly, in Claremont Canyon of the Berkeley Hills. Alameda County, California. 1931. Plate 6-C, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00011 ID. Bramlette, M.N. 11 Lenticularity of chert beds, particularly of those in middle part of photograph; scale is 5 inches long. San Luis Obispo County, California. 1931. Plate 6-B, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00012 ID. Bramlette, M.N. 12 Lenticular opaline chert in diatomite. Santa Barbara County, California. 1931. Plate 6-D, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00013 ID. Bramlette, M.N. 13 Lentils of dark opaline chert with laminae continuous from diatomite into chert. Santa Barbara County, California. 1931. Plate 7-A, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00014 ID. Bramlette, M.N. 14 Concentric banding in an opal concretion. San Luis Obispo County, California. 1931. Plate 7-B, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00015 ID. Bramlette, M.N. 15 Concentric banding and faint bedding shown in polished and etched faces of an opal concretion from the same locality as photo 14. San Luis Obispo County, California. 1931. Plate 7-C, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00016 ID. Bramlette, M.N. 16 Brecciated and recemented chert specimen; entrance road to Johns-Manville quarry near Lompoc. Santa Barbara County, California. 1931. Plate 7-D, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00017 ID. Bramlette, M.N. 17 Thin section showing chalcedony and quartz filling fractures in opaline chert; enlarged 30 x. Santa Barbara County, California. 1931. Plate 8-A, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00018 ID. Bramlette, M.N. 18 Thin section showing chalcedony and quartz filling fractures in opaline chert; enlarged 30 x; crossed nicols. Santa Barbara County, California. 1931. Plate 8-B, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00019 ID. Bramlette, M.N. 19 Chalcedony and quartz (clear areas) filling and partly replacing calcareous foraminiferal shells in porcelanite; enlarged 66 x. San Luis Obispo County, California. 1931. Plate 8- C, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00020 ID. Bramlette, M.N. 20 Chalcedony and quartz (clear areas) filling and partly replacing calcareous foraminiferal shells in porcelanite; enlarged 66 x; crossed nicols. San Luis Obispo County, California. 1931. Plate 8-D, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00021 ID. Bramlette, M.N. 21 Thin section of Spherulitic opal from a veinlet in the opal concretion shown in photo 15. San Luis Obispo County, California. 1931. Plate 9-A, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00022 ID. Bramlette, M.N. 22 Chalcedony (clear areas) filling the interior of large diatoms in opaline chert; irregular dark splotches are brown organic matter; enlarged 28x. Santa Barbara County, California. 1931. Plate 9-B, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00023 ID. Bramlette, M.N. 23 Chalcedony (clear areas) filling the interior of large diatoms in opaline chert; irregular dark splotches are brown organic matter; enlarged 28x, crossed nicols. Santa Barbara County, California. 1931. Plate 9-C, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00024 ID. Bramlette, M.N. 24 Large calcareous concretions in cherty shale in road cut near Hollywood Country Club, on north side of Santa Monica Hills, Los Angeles County, California. 1931. Plate 10-A, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00025 ID. Bramlette, M.N. 25 Calcareous concretion in cherty shale in sea cliff about 2.5 miles northeast of Pismo. San Luis Obispo County, California. 1931. Plate 10-B, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00026 ID. Bramlette, M.N. 26 Diatoms in thin section: from the calcareous concretion shown in photo 25, with clear and more coarsely crystalline calcite filling the interior of diatoms. San Luis Obispo County, California. 1931. Plate 11-A, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00027 ID. Bramlette, M.N. 27 Opaline diatoms obtained from the digestion with acid; of part of the specimen shown in photo 26. San Luis Obispo County, California. 1931. Plate 11-B, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00028 ID. Bramlette, M.N. 28 Thin section of tuff from the Obispo tuff member of the Monterey formation from the valley of San Luis Obispo Creek; San Luis Obispo County, California. 1931. Plate 11-C, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00029 ID. Bramlette, M.N. 29 Thin section of silicified bed in the Obispo tuff member of the Monterey formation at South Point, about 2 miles northwest of Pismo. San Luis Obispo County, California. 1931. Plate 11-D, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00030 ID. Bramlette, M.N. 30 Bentonite bed showing abrupt contacts with porcelaneous rocks, Carmel Valley, Monterey County, California. 1931. Plate 12-A, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00031 ID. Bramlette, M.N. 31 Bentonite bed in porcelaneous shale, showing squeezing and local thickening of the dark bentonite bed, southeast of Del Monte, Monterey County, California. 1931. Plate 12-B, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00032 ID. Bramlette, M.N. 32 Rhythmic bedding in road cut near entrance to Valley Park Country Club, on north side of Santa Monica Mountains, Los Angeles County, California. 1931. Plate 13-A, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00033 ID. Bramlette, M.N. 33 Specimen showing details of two of the rhythmic beds from the same locality, north side of Santa Monica Mountains, Los Angeles County, California. 1931. Plate 13-B, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00034 ID. Bramlette, M.N. 34 Details of rhythmic bedding on a scraped surface in road cut along Van Nuys-Beverly Glen Road: on north side of Santa Monica Mountains, Los Angeles County, California. 1931. Plate 13-C, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00036 ID. Bramlette, M.N. 36 Larger alternation superimposed on the thinner rhythmic bedding about 1,100 feet south of entrance to Valley Park Country Club, on north side of Santa Monica, Los Angeles County, California. 1931. Plate 12-D, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00037 ID. Bramlette, M.N. 37 Larger alternation superimposed on the thinner rhythmic bedding on the Topanga Canyon Road south of Girard; note sandstone dike that is offset along bedding plane slips. Los Angeles County, California. 1931. Plate 14-A, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00038 ID. Bramlette, M.N. 38 Details of bedding at same locality as photo 37; note change from rhythmites that are dominantly siliceous rock to those of a zone in which they are dominantly clastic sediments. Scale is 6.5 inches long. Los Angeles County, California. 1931. Plate 14-B, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00039 ID. Bramlette, M.N. 39 Polished face of one of the rhythmic beds from locality of photo 38; upper part is cherty shale. Los Angeles County, California. 1931. Plate 15-A, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00040 ID. Bramlette, M.N. 40 Specimen: Fine lamination in cherty shale, with darker layers richer in brown organic matter, Los Angeles County, California. 1931. Plate 15-B, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00041 ID. Bramlette, M.N. 41 Specimen: slight scour at top of diatomaceous upper layer of a rhythmite. Los Angeles County, California. 1931. Plate 15-C, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00042 ID. Bramlette, M.N. 42 Chert beds of silicified tuff within the Obispo tuff member of the Monterey formation; scale is 5 inches long. San Luis Obispo County, California. 1931. Plate 16-A, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00043 ID. Bramlette, M.N. 43 Lentils of chert in the diatomaceous rocks: along entrance road to Johns-Manville quarry near Lompoc, Santa Barbara County, California. 1931. Plate 16-B, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00044 ID. Bramlette, M.N. 44 Polished faces of two specimens showing continuity of bedding laminae from diatomaceous to dense cherty rock; dark crack in lower specimen is due to accidental break. Santa Barbara County, California. 1931. Plate 16-C, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00045 ID. Bramlette, M.N. 45 Intraformational conglomerate in sandstone and diatomaceous shale beds: south of Girard, on north side of Santa Monica Mountains. Los Angles County, California. 1931. Plate 17-A, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00046 ID. Bramlette, M.N. 46 Intraformational conglomerate: with boulders of soft mudstone at mouth of Dos Pueblos Creek. Santa Barbara County, California. 1931. Plate 17-B in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00047 ID. Bramlette, M.N. 47 Fine concentric banding and step-faulting shown on a polished and etched piece of opal concretion; lighter colored edge at left show surface weathering. Los Angeles County, California. 1931. Plate 17-C, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00048 ID. Bramlette, M.N. 48 Chert pebble with molluscan borings; showing compaction into the adjacent laminated rock (now chert). Santa Barbara County, California. 1931. Plate 17-D, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00049 ID. Bramlette, M.N. 49 Chert pebble conglomerate at contact of Monterey formation and tar sands of basal Pismo formation. San Luis Obispo County, California. 1931. Plate 18-A, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00050 ID. Bramlette, M.N. 50 Chert-pebble conglomerate and tar sand within the Monterey formation, west of the mouth of Gaviota Creek, Santa Barbara County, California. 1931. Plate 18-B, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00051 ID. Bramlette, M.N. 51 Small step faults in porcelaneous shale from the middle part of the Monterey formation on Chico-Martinez Creek, Kern County, California. 1931. Plate 18-C, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00052 ID. Bramlette, M.N. 52 Small step faults in black opaline chert occurring in diatomaceous rock at Malaga Cove, Palos Verdes Hills, Los Angeles County, California. 1931. Plate 18-D, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00053 ID. Bramlette, M.N. 53 Photomicrograph: Mashed foraminiferal shells in dense cherty shale; enlarged 66 x. Santa Barbara County, California. 1931. Plate 19-A, in U.S.Geological Survey Professional Paper 212. 1943. #1:/California-Professional paper 212/bmn00054 ID. Bramlette, M.N. 54 Intraformational deformation due to slumping of beds during deposition. Los Angeles County, California. 1931. Plate 19-B, in U.S.Geological Survey Professional Paper 212. 1943. #1:/Hawaii-Professional paper 214/mga00035 ID. Macdonald, G.A. 35 Mauna Loa from the southeast, showing Mokuaweoweo Caldera and the row of pit craters along the upper part of the southwest rift zone. Note the broad gentle slopes of the shield of Mauna Loa, built of thin, highly fluid lava flows of the Kau volcanic series. The slope of Mauna Kea is visible in the right background. Photo courtesy of 18th Air Base Photo Laboratory, Wheeler Field, Territory of Hawaii. Hawaii County, Hawaii. Circa 1942. Plate 11, U.S.Geological Survey Professional Paper 214. 1953. #1:/Hawaii-Professional paper 214/mga00036 ID. Macdonald, G.A. 36 Surficial ash deposits at the south edge of Kilauea Caldera. Well-bedded prehistoric vitric tuffs are overlain unconformably by tuff-breccia of the explosions of 1790. Hawaii County, Hawaii. Circa 1942. Plate 13, U.S.Geological Survey Professional Paper 214. 1953. #1:/Hawaii-Professional paper 214/mga00037 ID. Macdonald, G.A. 37 A small lenticular sill, 26 feet thick, and its dike feeder, cutting lava of the Kau volcanic series in the west wall of Mokuaweoweo caldera: Hawaii County, Hawaii. Circa 1942. Plate 14-A, U.S.Geological Survey Professional Paper 214. 1953. #1:/Hawaii-Professional paper 214/mga00038 ID. Macdonald, G.A. 38 Cross section of a thick AA flow of andesite belonging to the Laupahoehoe volcanic series exposed in a quarry near Paauilo on the northeast slope of Mauna Kea. The dense central portion is overlain by thick upper clinker phase and underlain by a thinner lower clinker phase. The base of the lower clinker phase rests on thin bed of tuffaceous soil just below the hammer handle. Hawaii County, Hawaii. Circa 1942. Plate 14-B, U.S.Geological Survey Professional Paper 214. 1953. #1:/North Carolina-Professional paper 213/pjt01231 ID. Pardee, J.T. 1231 Large vein of barren (Bull) quartz enclosed by Saprolite, Pine Hill quarry; excavated for road metal. Mecklenburg County, North Carolina. September 14, 1934. Plate 8-B, U.S.Geological Survey Professional Paper 213. 1948. #1:/North Carolina-Professional paper 213/pjt01248 ID. Pardee, J.T. 1248 "Mushroom" of granite near Mount Olive Church, 8 miles west of Charlotte. Gaston County, North Carolina. July 1934. Plate 3-B, U.S.Geological Survey Professional Paper 213. 1948. #1:/North Carolina-Professional paper 213/pjt01268 ID. Pardee, J.T. 1268 Form a panorama of folds in bedded tuff (volcanic series), east of Monroe, Union County, North Carolina. March 1934. Plate 4-B, U.S.Geological Survey Professional Paper 213. 1948. #1:/North Carolina-Professional paper 213/pjt01269 ID. Pardee, J.T. 1269 Form a panorama of folds in bedded tuff (volcanic series), east of Monroe, Union County, North Carolina. March 1934. Plate 4-B, U.S.Geological Survey Professional Paper 213. 1948. #1:/North Carolina-Professional paper 213/pjt01282 ID. Pardee, J.T. 1282 Slaty tuffs (volcanic series) along Uharie River. Montgomery County, North Carolina. June 1934. Plate 3-A, U.S.Geological Survey Professional Paper 213. 1948. #1:/South Carolina-Professional paper 213/pjt01289 ID. Pardee, J.T. 1289 Haile pit, Haile Gold mine: Standing remnant of diabase dike in foreground. Lancaster County, South Carolina. July 193 4. Plate 34-C, U.S.Geological Survey Professional Paper 213. 1948. #1:/South Carolina-Professional paper 213/pjt01290 ID. Pardee, J.T. 1290 Corrugations on fault plane; Brewer pit, Brewer gold mine. Chesterfield County, South Carolina. July 1934. Plate 34-B, U.S.Geological Survey Professional Paper 213. 1948. #1:/South Carolina-Professional paper 213/pjt01291 ID. Pardee, J.T. 1291 Northwest joint face; Brewer pit, Brewer gold mine. Chesterfield County, South Carolina. July 1934. Plate 34-A , U.S.Geological Survey Professional Paper 213. 1948. #1:/South Carolina-Professional paper 213/pjt01315 ID. Pardee, J.T. 1315 Bumalo Pit: northeast side; mineralized zone in schist. Haile Gold mine. Lancaster County, South Carolina. May 1935. Plate 34-D, U.S.Geological Survey Professional Paper 213. 1948. #1:/North Carolina-Professional paper 213/pjt01320 ID. Pardee, J.T. 1320 Fine grained banded tuff (volcanic series), bands represent bedding, cleavage is horizontal, crossing bedding at angle of 45 degrees. Stanly County, North Carolina. 1935. Plate 2-C, U.S.Geological Survey Professional Paper 213. 1948. #1:/North Carolina-Professional paper 213/pjt01321 ID. Pardee, J.T. 1321 Saprolite near Waxhaw: showing sheared folds; cleavage parallel to axial plane. Union County, North Carolina. 1935. Plate 4-C, U.S.Geological Survey Professional Paper 213. 1948. #1:/North Carolina-Professional paper 213/pjt01322 ID. Pardee, J.T. 1322 Gold ore, vein quartz (light) introduced along cleavage planes in "slate" (volcanic series); Howie mine, Union County, North Carolina. 1935. Plate 29-A, U.S.Geological Survey Professional Paper 213. 1948. #1:/North Carolina-Professional paper 213/pjt01323 ID. Pardee, J.T. 1323 Gold ore from 250-foot level, quartz (light) introduced along deformed bedding plane. Union County, North Carolina. 1935. Plate 9-A, U.S.Geological Survey Professional Paper 213. 1948. #1:/North Carolina-Professional paper 213/pjt01324 ID. Pardee, J.T. 1324 Gold ore, Crayton mine, quartz (light) introduced along fractures in "slate" (dark) of volcanic series. Cabarrus County, North Carolina. 1935. Plate 8-A, U.S.Geological Survey Professional Paper 213. 1948. #1:/South Carolina-Professional paper 213/pjt01328 ID. Pardee, J.T. 1328 Oxidized gold ore from weathered zone of Hartman pit, a breccia of silicified tuff cemented with iron oxides (volcanic series). Brewer gold mine. Chesterfield County, South Carolina. 1935. Plate 29-C, U.S.Geological Survey Professional Paper 213. 1948. #1:/South Carolina-Professional paper 213/pjt01331 ID. Pardee, J.T. 1331 Topaz rock from outcrop northwest of Brewer pit; replacement of silicificied brecciated tuff (volcanic series). The rock is practically all topaz; dark areas are caused by traces of iron oxides. Brewer gold mine. Chesterfield County, South Carolina. 1935. Plate 29-D, U.S.Geological Survey Professional Paper 213. 1948. #1:/South Carolina-Professional paper 213/pjt01355 ID. Pardee, J.T. 1355 Rock of Brewer quartz lode: Brewer pit at 100-foot depth, angular bodies of glassy quartz in a matrix of fine granular quartz. Brewer gold mine. Chesterfield County, South Carolina. 1936 . Plate 29-B, U.S.Geological Survey Professional Paper 213. 1948. #1:/Alabama-Professional paper 213/pcf00001 ID. Park, C.F. 1 Photomicrograph of schist of the Wedowee formation: near quartz diorite contact; pseudomorphs of quartz and muscovite after andalusite (?). Photo by K.E. Lohman. Hog Mountain, Tallapoosa County, Alabama. 193 . Plate 6-A, U.S.Geological Survey Professional Paper 213. 1948. #1:/Virginia-Professional paper 213/pcf00002 ID. Park, C.F. 2 Photomicrograph of partly sheared intrusive rock near lode, Franklin mine; enlarged 8 x. Photo by K.E. Lohman. Fauquier County, Virginia. 1934. Plate 5-B, U.S.Geological Survey Professional Paper 213. 1948. #1:/Virginia-Professional paper 213/pcf00003 ID. Park, C.F. 3 Photomicrograph of intensely sheared intrusive rock adjoining lode, Franklin mine; enlarged 8 x. Photo by K.E. Lohman. Fauquier County, Virginia. 1934. Plate 5-C, U.S.Geological Survey Professional Paper 213. 1948. #1:/Georgia-Professional paper 213/pcf00005 ID. Park, C.F. 5 Photomicrograph of wormy (myrmekitic) pattern of gold in quartz, many of the dusty particles and inclusion are gold and galena. Photo by K.E. Lohman. Battle Branch mine. Lumpkin County, Georgia. 1935. Plate 11-A, U.S.Geological Survey Professional Paper 213. 1948. #1:/Georgia-Professional paper 213/pcf00006 ID. Park, C.F. 6 Enlargement from just left of center of photo 5, graphic pattern of gold in quartz; photomicrograph by K.E. Lohman. Battle Branch mine. Lumpkin County, Georgia. 1935. Plate 11-B, U.S.Geological Survey Professional Paper 213. 1948. #1:/North Carolina-Professional paper 213/pcf00013 ID. Park, C.F. 13 Photomicrograph of garnet metacrysts in muscovite schist; black grains are pyrite. Photo by K.E. Lohman. Capps mine, Mecklenburg County, North Carolina. 1935. Plate 2-A, U.S.Geological Survey Professional Paper 213. 1948 #1:/Georgia-Professional paper 213/pcf00017 ID. Park, C.F. 17 Photomicrograph of concentric arrangement of magnetite inclusions in garnet nodule, quartz and sulfides fill cracks and center of nodule. K.E. Lohman. Battle Branch mine. Lumpkin County, Georgia. 1935. Plate 12-A, U.S.Geological Survey Professional Paper 213. 1948. #1:/Virginia-Professional paper 213/pcf00023 ID. Park, C.F. 23 Polished slab. Ore from 290-foot level, pyrite, sercicite, and calcite in quartz; Franklin mine, Fauquier County, Virginia. 1934. Plate 15-B, U.S.Geological Survey Professional Paper 213. 1948. #1:/Virginia-Professional paper 213/pcf00024 ID. Park, C.F. 24 Vaucluse mine, open cur, looking southwest, note prominent fluting in walls. Orange County, Virginia. 1934. Plate 19-B, U.S.Geological Survey Professional Paper 213. 1948. #1:/Virginia-Professional paper 213/pcf00025 ID. Park, C.F. 25 Dragline and gold-saving machine Collins placer. Goochland County, Virginia. 1934. Plate 19-A, U.S.Geological Survey Professional Paper 213. 1948. #1:/Georgia-Professional paper 213/pcf00037 ID. Park, C.F. 37 View showing relations of sheared granite to amphibole gneiss. Barlow mine. Lumpkin County, Georgia. 1935. Plate 3-C, U.S.Geological Survey Professional Paper 213. 1948. #1:/Georgia-Professional paper 213/pcf00050 ID. Park, C.F. 50 Polished slab; banded ore, white, quartz, gray, amphibole, black, garnet and chlorite, from Lockhart mine, Georgia. 1934. Plate 9-B, U.S.Geological Survey Professional Paper 213. 1948. #1:/Georgia-Professional paper 213/pcf00052 ID. Park, C.F. 52 Polished slab of sheared granitic dike, Barlow mine. Lumpkin County, Georgia. 1935 . Plate 4-A, U.S.Geological Survey Professional Paper 213. 1948. #1:/Georgia-Professional paper 213/pcf00053 ID. Park, C.F. 53 Polished slab, marble band in Carolina gneiss, nodules in the gneiss consist of garnets and quartz, Battle Branch mine. Lumpkin County, Georgia. 1934. Plate 2-B, U.S.Geological Survey Professional Paper 213. 1948. #1:/Georgia-Professional paper 213/pcf00054 ID. Park, C.F. 54 Polished slab: Gold veinlets (white) in Carolina gneiss; Battle Branch mine. Lumpkin County, Georgia. 1935. Plate 12-C, U.S.Geological Survey Professional Paper 213. 1948. #1:/Georgia-Professional paper 213/pcf00061 ID. Park, C.F. 61 Polished slab: quartz lenses in Carolina gneiss, Ivy cut. Georgia. 1935.Plate 10, U.S.Geological Survey Professional Paper 213. 1948. #1:/Georgia-Professional paper 213/pcf00148 ID. Park, C.F. 148 Lode in pillar, Black shaft at 167-foot depth, a typical stringer lead. Cherokee mine. Photo by R.A. Newton. Cherokee County, Georgia. 1935. Plate 9-C, U.S.Geological Survey Professional Paper 213. 1948. #1:/Texas-Professional paper 215/dnh01747 ID. Darton, N.H. 1747 Structural features in Black limestone of Bone Spring: Truncated beds and local unconformities in narrows of Bone Canyon, ¼ mile west of Bone Spring; at center a small pocket filled by black limestone lies on one of the surfaces of unconformity. Culberson County, Texas. Circa 1918. Plate 51-B, in U.S.Geological Survey Bulletin 794. 1928. Plate 11-A, in Ue .S.Geological Survey Professional Paper 215. 1948. #1:/Texas-Professional paper 215/kpb00366 ID. King, P.B. 366 El Capitan from south, the cliff of El Capitan lies near the center, with Guadalupe Peak concealed behind it. Numbers (on published photo; progressing down the mountain) refer to original section by Shunard; White limestone (Capitan); upper dark limestone (Pinery); yellow sandstone (Delaware Mountain); basal black limestone (Bone Spring). Letters (on published photo progressing downward) refer to Quaternary deposits; older slope deposits; younger slope deposits: Oblique aerial photo by U.S. Army Air Corps. Culberson County, Texas. Circa 1945. Plate 1, in U.S.Geological Survey Professional Paper 215. 1948. #1:/Texas-Professional paper 215/kpb00367 ID. King, P.B. 367 Structural features in Black limestone of Bone Spring: Contorted beds in ravine 3.5 miles south-southeast of El Capitan, note recumbent folds and vertical joints. Photo by J.B. Knight. Culberson County, Texas. Circa 1934. Plate 11-B, in U.S.Geological Survey Professional Paper 215. 1948. #1:/Texas-Professional paper 215/kpb00368 ID. King, P.B. 368 Laminated sediments of Permian age, the laminations may be varves or annual deposits; thin sections, in transmitted light: anhydrite of Castle formations, on road to 9 K ranch 4 miles south of U.S. Highway no. 62. Texas. Circa 1934. Plate 10-B, in U.S.Geological Survey Professional Paper 215. 1948. #1:/Texas-Professional paper 215/kpb00369 ID. King, P.B. 369 Laminated sediments of Permian age, the laminations may be varves or annual deposits; thin sections, in transmitted light: Black limestone of Bone Spring, several hundred feet above base, from Sierra Diablo scarp north of Victorio Canyon. Culberson County, Texas. Circa 1934. Plate 10-A, in U.S.Geological Survey Professional Paper 215. 1948. #1:/Texas-Professional paper 215/kpb00370 ID. King, P.B. 370 Some fossils from Guadalupe Mountains: natural size; Pisolites, probably in part of algal origin, from Carlsbad limestone. Culberson County, Texas. Circa 1934. Plate 19-A, in U.S.Geological Survey Professional Paper 215. 1948. #1:/Washington DC-Professional paper 217/dnh00079 ID. Darton, N.H. 79 Fault in rear of Calvert Street near Zoological Park, terrace gravel and loam on gneiss, looking north; east side had dropped about 2 feet. Washington, District of Columbia. 1901. Plate 6-B, in U.S.Geological Survey Professional Paper 217. 1950. #1:/Washington DC-Professional paper 217/dnh00099 ID. Darton, N.H. 99 Plateau gravel (Pliocene?) on Calvert formation (Miocene): Arkose of Potomac group just below. Tunlaw Road north of Calvert Street, on line of 38th Street. Washington, District of Columbia. 1894. Plate 3-A, in U.S.Geological Survey Professional Paper 217. 1950. #1:/Washington DC-Professional paper 217/dnh00278 ID. Darton, N.H. 278 Terrace gravel and loam on gneiss. N. Street near 24th Street, NW. Much of the older part of city is built on the river terrace deposits. To the east these deposits lie on sand and clay of the Potomac group. Washington, District of Columbia. 1895. Plate 5-A, in U.S.Geological Survey Professional Paper 217. 1950. #1:/Washington DC-Professional paper 217/dnh01796 ID. Darton, N.H. 1796 Gravel of Potomac group on gneiss: north side of Harvard Street, 200 yards east of entrance to Zoological Park, looking north. Washington, District of Columbia. 1928 Plate 3-A, in U.S.Geological Survey Professional Paper 217. 1950. #1:/Washington DC-Professional paper 217/dnh01800 ID. Darton, N.H. 1800 Terrace deposit capping Arkose near base of Potomac Group. Cut on east side of 16th Street at Meridian Hill Park; later concealed by wall. Top of terrace is 205 feet above sea level. Washington, District of Columbia. 1900. Plate 5-B, in U.S.Geological Survey Professional Paper 217. 1950. #1:/Washington DC-Professional paper 217/dnh01816 ID. Darton, N.H. 1816 Fault on eastern edge of Zoological Park, Adams Mill Road near Clydesdale Place, looking northwest; fault is between gneiss and terrace gravel. Washington, District of Columbia. 1925. Plate 6-A, in U.S.Geological Survey Professional Paper 217. 1950. #1:/Washington DC-Professional paper 217/dnh02149 ID. Darton, N.H. 2149 Terrace deposit of Capitol Hill, about 250 yards south of the Capitol, top of terrace is 80 feet above sea level. Geologist stands on underlying Potomac group. Washington, District of Columbia. Circa 1910. Plate 4, in U.S.Geological Survey Professional Paper 217. 1950. #1:/California-Professional paper 194/jwdj0033 ID. Johnston, W.D., Jr. 33 Brecciated vein filling, North Star mine, A vein 4,000-foot level: Underground photograph of quartz veins. Nevada County, California. 1931. Plate 9-C, U.S.Geological Survey Professional Paper 194. 1940. #1:/California-Professional paper 194/jwdj0052 ID. Johnston, W.D., Jr. 52 Vein showing two generations of quartz. The older quartz contains many wall rock inclusions; the younger quartz is ribboned. The scale in the upper left corner is 6 inches long. North Star min, No. 2 vein, 7,200-foot level. Nevada County, California. 1931. Plate 8-C, U.S.Geological Survey Professional Paper 194. 1940. #1:/California-Professional paper 194/jwdj0056 ID. Johnston, W.D., Jr. 56 Vein containing a single generation of homogeneous quartz, the inclusions rest on the footwall; scale is 6 inches long. North Star mine, North Star vein, 2,700 foot level: Underground photograph of quartz veins. Nevada County, California. 1931. Plate 8-A, U.S.Geological Survey Professional Paper 194. 1940. #1:/California-Professional paper 194/jwdj0059 ID. Johnston, W.D., Jr. 59 Beginning of a vein split, cross fractures connect the principal quartz strands, North Star mine, No. 2 vein, stope between 6,000 and 6,300-foot levels: Underground photograph of quartz veins. Nevada County, California. 1931. Plate 8-E, U.S.Geological Survey Professional Paper 194. 1940. #1:/California-Professional paper 194/jwdj0060 ID. Johnston, W.D., Jr. 60 Composed as one image: underground photograph of the intersection of basic and aplite dikes in granodiorite that have been faulted by vein fracture. North Star mine, 7,200-foot level. Nevada County, California. 1931. Plate 24, and used as basis for figure 39 in U.S.Geological Survey Professional Paper 194. 1940. #1:/California-Professional paper 194/jwdj0063 ID. Johnston, W.D., Jr. 63 Sheeted zone at intersection of two veins, North Star mine, No. 2 drift, 8,200-foot level: Underground photograph of sheeted veins. Nevada County, California. 1931. Plate 10- D, U.S.Geological Survey Professional Paper 194. 1940. #1:/California-Professional paper 194/jwdj0064 ID. Johnston, W.D., Jr. 64 Sheeted vein, North Star mine, No. 3 vein, 8,600-foot level: Underground photograph of sheeted veins. Nevada County, California. 1931. Plate 10-B, U.S.Geological Survey Professional Paper 194. 1940. #1:/California-Professional paper 194/jwdj0073 ID. Johnston, W.D., Jr. 73 Pinch in quartz vein from 24 to 6 inches, North Star mine, No. 2 vein, 7,200-foot level: Underground photograph of quartz veins. Nevada County, California. 1931. Plate 9-F, U.S.Geological Survey Professional Paper 194. 1940. #1:/California-Professional paper 194/jwdj0077 ID. Johnston, W.D., Jr. 77 Comb and sheared quartz: thin section of upper part of comb and sheared quartz; it shows clear euhedral quartz surrounded by a dark rim of fine grained ankerite and all interstices filled with coarser-grained ankerite. The lower part of the section shows older sheared quartz with a little ankerite. Black polygons in clear quartz near top of section are pyrite. Nevada County, California. 1931. Plate 17-B, U.S.Geological Survey Professional Paper 194. 1940. #1:/California-Professional paper 194/jwdj0079 ID. Johnston, W.D., Jr. 79 Vugs and comb quartz: thin section from vug, showing euhedral quartz, chlorite and carbonates. Nevada County, California. 1931. Plate 15-C, U.S.Geological Survey Professional Paper 194. 1940. #1:/California-Professional paper 194/jwdj0081 ID. Johnston, W.D., Jr. 81 Comb quartz and carbonates: same section with carbonates dissolved by hydrochloric acID. The quartz shows comb structure and cavities, which existed prior to the introduction of the carbonates. North Star mine No. 2 vein, 8,600-foot level: Opposite saw-cut face of photo 82. Nevada County, California. 1931. Plate 18-A, U.S.Geological Survey Professional Paper 194. 1940. #1:/California-Professional paper 194/jwdj0082 ID. Johnston, W.D., Jr. 82 Comb quartz and carbonates: polished section of vein composed of quartz and carbonates, North Star mine No. 2 vein, 8,600-foot level: Opposite saw-cut face of photo 81. Nevada County, California. 1931. Plate 18-A, U.S.Geological Survey Professional Paper 194. 1940. #1:/California-Professional paper 194/jwdj0088 ID. Johnston, W.D., Jr. 88 Photographs of ore: Polished slab showing sheared quartz with later calcite, the black areas are indurated gouge; North Star mine, New York Hill vein, 3,400-foot level. Nevada County, California. 1931. Plate 11-B, U.S.Geological Survey Professional Paper 194. 1940. #1:/California-Professional paper 194/jwdj0089 ID. Johnston, W.D., Jr. 89 Photographs of ore: Polished slab showing broken pyrite in vein quartz, North Star mine, No. 1 vein, 8,200-foot level. Nevada County, California. 1931. Plate 11-A, U.S.Geological Survey Professional Paper 194. 1940. #1:/California-Professional paper 194/jwdj0090 ID. Johnston, W.D., Jr. 90 Photographs of ore: polished slab showing sheared quartz with carbonate, cement; North Star mine, No. 3 vein, 9,000-foot level. Nevada County, California. 1931. Plate 11-C, U.S.Geological Survey Professional Paper 194. 1940. #1:/California-Professional paper 194/jwdj0092 ID. Johnston, W.D., Jr. 92 Polished slab of granodiorite showing sheeted zone of carbonate veinlets, North Star mine, No. 1 vein, 7,200-foot level: Underground photograph of sheeted veins. Nevada County, California. 1931. Plate 10-A, U.S.Geological Survey Professional Paper 194. 1940. #1:/California-Professional paper 194/jwdj0095 ID. Johnston, W.D., Jr. 95 Vugs and comb quartz: Polished slab from vug, euhedral quartz crystals are coated with white ankerite. The vug is filled with a dark-green mixture of chlorite and mechanically ground quartz in a matrix of carbonates. Nevada County, California. 1931. Plate 15-B, U.S.Geological Survey Professional Paper 194. 1940. #1:/California-Professional paper 194/jwdj0097 ID. Johnston, W.D., Jr. 97 Strong Walls in granodiorite with interstitial breccia zone: Empire mine, 5,000-foot level. Nevada County, California. 1931. Plate 7-A, U.S.Geological Survey Professional Paper 194. 1940. #1:/California-Professional paper 194/jwdj0113 ID. Johnston, W.D., Jr. 113 Split in quartz vein with badly shattered septum and many cross veinlets. The granodiorite inclusions are probably replaced by carbonates and sercicite. The scale is 6 inches long: North Star mine, No. 2 vein, 6,600-foot level: Underground photograph of sheeted veins. Nevada County, California. 1931. Plate 10-E, U.S.Geological Survey Professional Paper 194. 1940. #1:/California-Professional paper 194/jwdj0221 ID. Johnston, W.D., Jr. 221 Mineralogy of the veins: Polished slab showing scheelite and quartz vein filling: Union Hill mine. Nevada County, California. 1931. Plate 12-A, U.S.Geological Survey Professional Paper 194. 1940. #1:/California-Professional paper 194/jwdj0298 ID. Johnston, W.D., Jr. 298 Details of vug lining: thin section of vug filling; euhedral quartz is surrounded by a vein of ankerite (dark) and a vein of smaller quartz combs (light). At that stage the vug lining was disturbed, and some of the euhedral quartz crystals were broken. Finally a mixture of chlorite and mechanically ground quartz cemented by ankerite filled the entire vug and formed a matrix around the earlier combs, North Star mine, No. 2 vein, 6,300-foot level. Plain light. Nevada County, California. 1931. Plate 16-A, U.S.Geological Survey Professional Paper 194. 1940. #1:/California-Professional paper 194/jwdj0299 ID. Johnston, W.D., Jr. 299 Details of vug lining: thin section of vug filling; euhedral quartz is surrounded by a vein of ankerite (dark) and a vein of smaller quartz combs (light). At that stage the vug lining was disturbed, and some of the euhedral quartz crystals were broken. Finally a mixture of chlorite and mechanically ground quartz cemented by ankerite filled the entire vug and formed a matrix around the earlier combs, North Star mine, No. 2 vein, 6,300-foot level. Crossed nicols. Nevada County, California. 1931. Plate 16-B, U.S.Geological Survey Professional Paper 194. 1940. #1:/California-Professional paper 194/jwdj0302 ID. Johnston, W.D., Jr. 302 Photomicrograph showing zoned enclosures and vacuoles: euhedral quartz surrounded by fine-grained ankerite and chlorite. Empire mine, 7,000-foot level. Plain light. Nevada County, California. 1931. Plate 21-D, U.S.Geological Survey Professional Paper 194. 1940. #1:/California-Professional paper 194/jwdj0303 ID. Johnston, W.D., Jr. 303 Photomicrograph of brecciated quartz: cemented by chalcedony, in the large quartz area at the top center are two small vugs lined with clear opal. Golden Center mine, Sleep vein, 500-foot level. One nicol. Nevada County, California. 1931. Plate 20-B, U.S.Geological Survey Professional Paper 194. 1940. #1:/California-Professional paper 194/jwdj0304 ID. Johnston, W.D., Jr. 304 Photomicrograph showing zoned enclosures and vacuoles: quartz with marginal zones of vacuoles parallel to prism faces. In the interior of the crystals the lines of vacuoles are independent of crystallographic direction. In the upper part of the section sercicite is replacing quartz. North Star mine, No. 1 shaft, below 7,850-foot station. Plain light. Nevada County, California. 1931. Plate 21-B, U.S.Geological Survey Professional Paper 194. 1940. #1:/California-Professional paper 194/jwdj0306 ID. Johnston, W.D., Jr. 306 Photomicrograph of brecciated quartz: cemented by ankerite, the black dots in the clear quartz are vacuoles. Empire mine, Newmont vein, 3,800-foot level: One nicol. Nevada County, California. 1931. Plate 20-A, U.S.Geological Survey Professional Paper 194. 1940. #1:/California-Professional paper 194/jwdj0307 ID. Johnston, W.D., Jr. 307 Vacuoles and phantom veinlets: vacuoles in vein quartz with occluded liquid containing gas bubbles. North Star mine, No. 2 vein, 6,900-foot level. Nevada County, California. 1931. Plate 22-A, U.S.Geological Survey Professional Paper 194. 1940. #1:/California-Professional paper 194/jwdj0308 ID. Johnston, W.D., Jr. 308 Vacuoles and phantom veinlets: another thin section from the same specimen as photo 307; a negative crystal appears in the center. Nevada County, California. 1931. Plate 22- B, U.S.Geological Survey Professional Paper 194. 1940. #1:/California-Professional paper 194/jwdj0309 ID. Johnston, W.D., Jr. 309 Photomicrographs of sheared quartz: comb quartz granulated along the vein wall. Fine- grained material at top of section is ankerite. Thin section shows the development of sheared textures from comb quartz. North Star mine, No. 3 vein, 9,000 foot-level. Crossed nicols. Nevada County, California. 1931. Plate 19-D, U.S.Geological Survey Professional Paper 194. 1940. #1:/California-Professional paper 194/jwdj0310 ID. Johnston, W.D., Jr. 310 Photomicrograph showing zoned enclosures and vacuoles: ankerite veinlets cutting small quartz vein and extending into the wall rock. Empire mine, 2,700-foot level. Plain light. Nevada County, California. 1931. Plate 21-A, U.S.Geological Survey Professional Paper 194. 1940. #1:/California-Professional paper 194/jwdj0311 ID. Johnston, W.D., Jr. 311 Photomicrographs of sheared quartz: irregular granulation zones, note strain lines in the larger quartz grains. Empire mine 4,000-foot level. Crossed nicols. Nevada County, California. 1931. Plate 19-B, U.S.Geological Survey Professional Paper 194. 1940. #1:/California-Professional paper 194/jwdj0312 ID. Johnston, W.D., Jr. 312 Photomicrographs of sheared quartz: granulation zones parallel to vein walls, gold occurs in the zones of granulation. Pennsylvania mine, 1,100-foot level. Crossed nicols. Nevada County, California. 1931. Plate 19-A, U.S.Geological Survey Professional Paper 194. 1940. #1:/California-Professional paper 194/jwdj0313 ID. Johnston, W.D., Jr. 313 Photomicrographs of sheared quartz: irregular granulation with development of mortar structure. North Star mine No. 2 vein, 8,200-foot level. Crossed nicols. Nevada County, California. 1931. Plate 19-C, U.S.Geological Survey Professional Paper 194. 1940. #1:/California-Professional paper 194/jwdj0315 ID. Johnston, W.D., Jr. 315 Photomicrograph of brecciated quartz: cemented by limonitic chalcedony (black), an earlier zone of shearing is marked by the fine-grained quartz. Empire mine, 1,300-foot level. Crossed nicols. Nevada County, California. 1931. Plate 20-C, U.S.Geological Survey Professional Paper 194. 1940. #1:/California-Professional paper 194/jwdj0316 ID. Johnston, W.D., Jr. 316 Feather quartz in crossing: Empire mine, 4,000-foot level, short drift on crosscut to X vein. Crossed nicols. Nevada County, California. 1931. Plate 23-B, U.S.Geological Survey Professional Paper 194. 1940. #1:/California-Professional paper 194/jwdj0317 ID. Johnston, W.D., Jr. 317 Feather quartz in crossing: Empire mine, 3,000 foot-level, south drift. Crossed nicols. Nevada County, California. 1931. Plate 23-A, U.S.Geological Survey Professional Paper 194. 1940. #1:/Utah-Professional paper 205/sem00278 ID. Spieker, E.M. 278 Conglomerate of the Price River formation in Red Narrows, east of Thistle, a representative display of the textures and outcrops of the lower part of the Price River in the western districts. The photograph was taken in 1924, and the ledge shown has since been complete removed in highway construction. Utah County, Utah. Plate 21-A, U.S.Geological Survey Professional Paper 205. 1946. #1:/Pennsylvania-Professional paper 204/miscel11 ID. Miscellaneous 11 Photomicrograph of Antietam quartzite from Strickler anticline; constituents are quartz and albite (white), muscovite (gray) and biotite (black); enlarged 15 X. Pennsylvania. Circa 1930. Plate 4-A, U.S.Geological Survey Professional Paper 204. 1944 #1:/Pennsylvania-Professional paper 204/sgw01288 ID. Stose, G.W. 1288 Weathered surface of mottled limestone (calico rock) in middle member of Kinzers formation, exposed in quarry of Universal Gypsum & Lime Co: West York, York County, Pennsylvania. Circa 1930. Plate 5-B, U.S.Geological Survey Professional Paper 204. 1944. #1:/Pennsylvania-Professional paper 204/sgw01291 ID. Stose, G.W. 1291 Erosion remnant of quartzite beds in Chickies slate forming rock pinnacle in floodplain of Codorus Creek, near Brillhart; preserves crest of an anticline. York County, Pennsylvania. 1937. Plate 2-D, U.S.Geological Survey Professional Paper 204. 1944. #1:/Pennsylvania-Professional paper 204/sgw01293 ID. Stose, G.W. 1293 Thrust fault in Roy Bittinger Quarry, dark argillaceous limestone thrust westward (to left) over thick-bedded granular limestone. York County, Pennsylvania. Circa 1930. Plate 6- B, U.S.Geological Survey Professional Paper 204. 1944. #1:/Pennsylvania-Professional paper 204/sgw01295 ID. Stose, G.W. 1295 Vertical normal fault in Roy Bittinger Quarry; dark thin-bedded argillaceous limestone at left is faulted down relative to thick bedded granular limestone, both limestones are part of the Kinzers formation. Spring Grove. York County, Pennsylvania. Circa 1930. Plate 6-A, U.S.Geological Survey Professional Paper 204. 1944. #1:/Pennsylvania-Professional paper 204/sgw01296 ID. Stose, G.W. 1296 Ferruginous limestone conglomerate of the Conestoga limestone filling crevices in lower Cambrian dolomite, near Conestoga Creek, 2 miles northeast of Lancaster. Lancaster County, Pennsylvania. Circa 1930. Plate 8-D, U.S.Geological Survey Professional Paper 204. 1944. #1:/Pennsylvania-Professional paper 204/sgw01316 ID. Stose, G.W. 1316 Fault in Kinzers formation exposed in quarry of York Valley Lime & Stone Co., white marble thrust over dark argillaceous limestone and shale at left; fault plane dips 60 degrees S. (to the right): six miles northeast of York. York County, Pennsylvania. circa 1930. Plate 5-D, U.S.Geological Survey Professional Paper 204. 1944. #1:/Pennsylvania-Professional paper 204/sgw01319 ID. Stose, G.W. 1319 Harpers phyllite thrust northwestward over Ledger dolomite at left, in small roadside quarry on Pottery Hill, southwest of York. York County, Pennsylvania. Circa 1930. Plate 18-B, U.S.Geological Survey Professional Paper 204. 1944. #1:/Pennsylvania-Professional paper 204/sgw01320 ID. Stose, G.W. 1320 Structure in limestones of Kinzers formation in abandoned quarry of Palmer Lime & Cement Co., thin black dolomitic bed, which bends downward, is apparently overlapped unconformably by horizontal beds. West York York County, Pennsylvania. Circa 1930. Plate 5-C, U.S.Geological Survey Professional Paper 204. 1944.#1:/Pennsylvania- #1:/Pennsylvania-Professional paper 204/sgw01326 ID. Stose, G.W. 1326 Reticulately weathered argillaceous-banded limestone of upper member of Kinzers formation in railroad cut south of quarry of Thomasville Stone and Lime Co., beds generally fossiliferous. York County, Pennsylvania. Circa 1930. Plate 5-A, U.S.Geological Survey Professional Paper 204. 1944. #1:/Pennsylvania-Professional paper 204/sgw01334 ID. Stose, G.W. 1334 Unconformable contact of Conestoga limestone on lower Cambrian dolomite, large angular blocks of white marble in basal beds of the Conestoga; old quarry 2 miles northeast of Lancaster. Lancaster County, Pennsylvania. Circa 1930. Plate 8-C, U.S.Geological Survey Professional Paper 204. 1944. #1:/Pennsylvania-Professional paper 204/sgw01502 ID. Stose, G.W. 1502 Conestoga limestone showing characteristic thin beds in argillaceous and carbonaceous partings, thicker lenticular bed is dolomite. Quarry in eastern part of Columbia. Lancaster County, Pennsylvania. Circa 1930. Plate 7-A, U.S.Geological Survey Professional Paper 204. 1944. #1:/Pennsylvania-Professional paper 204/sgw02103 ID. Stose, G.W. 2103 Flat-lying coarse pebble beds in Hellam conglomerate member of Chickies quartzite, top of Mount Zion ridge just north of the York quadrangle. Somerset County, Pennsylvania. 1937. Plate 2-B, U.S.Geological Survey Professional Paper 204. 1944. #1:/Pennsylvania-Professional paper 204/sgw02104 ID. Stose, G.W. 2104 Cobble bed in Hellam conglomerate member of Chickies quartzite at Highmount. Rounded pebbles are milky and white quartz as much as 3 inches in size in fine-grained quartzose matrix. York County, Pennsylvania. 1937. Plate 2-A, U.S.Geological Survey Professional Paper 204. 1944. #1:/Pennsylvania-Professional paper 204/sgw02110 ID. Stose, G.W. 2110 Sandy limestone and overlying bed of sheared limestone conglomerate of the Conestoga, Hershey Sand Co., pit Hanover. Cleavage is steeper that bedding and dips 60 degrees SE. York County, Pennsylvania. 1937. Plate 8-A, U.S.Geological Survey Professional Paper 204. 1944. #1:/Pennsylvania-Professional paper 204/sgw02112 ID. Stose, G.W. 2112 Bedding surface of conglomerate in same quarry (as photo 2110), shows irregular angular blocks of limestone in sandy limestone matrix. York County, Pennsylvania. 1937. Plate 8-B, U.S.Geological Survey Professional Paper 204. 1944. #1:/Pennsylvania-Professional paper 204/sgw02117 ID. Stose, G.W. 2117 Closely folded thin-bedded argillaceous-banded Conestoga limestone. In clay pit of William Grothe Brick Co., southeast of York. Folds overturned to the northwest; layers offset b cleavage dipping 50 degrees SE. York County, Pennsylvania. 1937. Plate 7-B, U.S.Geological Survey Professional Paper 204. 1944. #1:/Illinois-Professional paper 218/rww00177 ID. Rubey. W.W. 177 Exposure of St. Peter sandstone along Mississippi River in Cap Au Gres, view northward from near Dogtown Landing in SW ¼ sec. 29, T. 12 S., R. 2 W. Calhoun County, Illinois. Circa 1928. Plate 3-A, in U.S.Geological Survey Professional Paper 218. 1952. #1:/Illinois-Professional paper 218/rww00179 ID. Rubey. W.W. 179 Regularly bedded layers of St. Peter sandstone at southern end Cap Au Gres, of SW ¼ sec. 29, T. 12 S., R. 2 W. Calhoun County, Illinois. Circa 1928. Plate 3-B, in U.S.Geological Survey Professional Paper 218. 1952. #1:/Illinois-Professional paper 218/rww00180 ID. Rubey. W.W. 180 Regularly bedded layers of St. Peter sandstone at northern end of Cap Au Gres, NE ¼ sec. 30, T. 12 S., R. 2 W. Calhoun County, Illinois. Circa 1928. Plate 3-C, in U.S.Geological Survey Professional Paper 218. 1952. #1:/Illinois-Professional paper 218/rww00182 ID. Rubey. W.W. 182 Decorah limestone, thin ripple-marked beds of limestone alternating with thin layers of calcareous shale, NE ¼ sec. 6, T.12 S. R. 2 W. Calhoun County, Illinois. Circa 1928. Plate 5-A, in U.S.Geological Survey Professional Paper 218. 1952. #1:/Illinois-Professional paper 218/rww00184 ID. Rubey. W.W. 184 Decorah limestone, overlain by massive (overhanging) Kimmswick limestone; NE ¼ sec. 6, T.12 S. R. 2 W. Calhoun County, Illinois. Circa 1928. Plate 5-B, in U.S.Geological Survey Professional Paper 218. 1952. #1:/Illinois-Professional paper 218/rww00185 ID. Rubey. W.W. 185 Bluff of massive Kimmswick limestone overlying Decorah limestone NE ¼ sec. 6, T.12 S. R. 2 W. Calhoun County, Illinois. Circa 1928. Plate 5-C, in U.S.Geological Survey Professional Paper 218. 1952. #1:/Illinois-Professional paper 218/rww00186 ID. Rubey. W.W. 186 Brassfield limestone, lying unconformably upon Edgewood limestone, SW ¼ SW ¼ sec. 18, T. 10 S. R.2 W. Calhoun County, Illinois. Circa 1928. Plate 6-B, in U.S.Geological Survey Professional Paper 218. 1952. #1:/Illinois-Professional paper 218/rww00188 ID. Rubey. W.W. 188 Specimen: "Hamburg" oolite in Glen Park formation. SW ¼ sec. 26, T. 9 S., R. 3 W., enlarged 1.5 times. Calhoun County, Illinois. Circa 1928. Plate 7-A, in U.S.Geological Survey Professional Paper 218. 1952. #1:/Illinois-Professional paper 218/rww00189 ID. Rubey. W.W. 189 Specimen: Thinly laminated siltstone in Hannibal shale: NE ¼ NE ¼ sec. 1, T. 10 S, R. 3 W. Enlarged twice. Calhoun County, Illinois. Circa 1928. Plate 7-B, in U.S.Geological Survey Professional Paper 218. 1952. #1:/Illinois-Professional paper 218/rww00190 ID. Rubey. W.W. 190 Overturned beds along Cap Au Gres flexure, Cedar Valley limestone and Hannibal shale at right, Chouteau limestone in center and at left, SW ¼ SE ¼ sec. 11, T. 6 N., R. 13 W. Jersey County, Illinois. Circa 1928. Plate 7-C, in U.S.Geological Survey Professional Paper 218. 1952. #1:/Illinois-Professional paper 218/rww00192 ID. Rubey. W.W. 192 Gradational contact between Hannibal shale and Chouteau limestone: SW ¼ SW ¼ sec. 31, T. 9 S., R. 2 W. Calhoun County, Illinois. Circa 1928. Similar to plate 7-D, in U.S.Geological Survey Professional Paper 218. 1952. #1:/Illinois-Professional paper 218/rww00193 ID. Rubey. W.W. 193 Quarry along Mississippi River in St. Louis limestone; NW ¼ NW ¼ sec. 27, T. 13 S., R. 2 W. Calhoun County, Illinois. Circa 1928. Plate 8-A, in U.S.Geological Survey Professional Paper 218. 1952. #1:/Illinois-Professional paper 218/rww00194 ID. Rubey. W.W. 194 Specimen: Sandy limestone at top of St. Louis limestone, obscurely cross-bedded; natural size. NW ¼ SE ¼ sec. 9, T. 6 N., R. 13 W. Jersey County, Illinois. Circa 1928. Plate 8- C, in U.S.Geological Survey Professional Paper 218. 1952. #1:/Illinois-Professional paper 218/rww00195 ID. Rubey. W.W. 195 St. Louis limestone dipping 26 degrees southward, NW ¼ SE ¼ sec. 9, T.6 N., R. 13 W. Jersey County, Illinois. Circa 1928. Plate 9-A, in U.S.Geological Survey Professional Paper 218. 1952. #1:/Illinois-Professional paper 218/rww00196 ID. Rubey. W.W. 196 Conglomeratic beds in St. Louis limestone: NW ¼ SE ¼ sec. 9, T. 6 N., R. 13 W. Jersey County, Illinois. Circa 1928. Plate 9-B, in U.S.Geological Survey Professional Paper 218. 1952. #1:/Illinois-Professional paper 218/rww00197 ID. Rubey. W.W. 197 Stratified drift in Illinoian till inclined steeply eastward against direction of ice movement, NW ¼ SW ¼ sec. 28, T. 8 N., R. 13 W. Jersey County, Illinois. Circa 1928. Plate 11-A, in U.S.Geological Survey Professional Paper 218. 1952. #1:/Illinois-Professional paper 218/rww00198 ID. Rubey. W.W. 198 Stratified drift associated with Illinoian till, SW ¼ NW ¼ sec. 11, T. 8 N., R. 13 W. Jersey County, Illinois. Circa 1928. Plate 11-B, in U.S.Geological Survey Professional Paper 218. 1952. #1:/Illinois-Professional paper 218/rww00199 ID. Rubey. W.W. 199 Exposure of varved clay and silt: N. center sec. 14, T. 7 N, R. 13 W. Jersey County, Illinois. Circa 1928. Plate 11-C, in U.S.Geological Survey Professional Paper 218. 1952. #1:/Illinois-Professional paper 218/rww00201 ID. Rubey. W.W. 201 Exposure of Brussels formation showing thick beds of loess like silt interbedded with laminated clay. SE ¼ NE ¼ sec. 28, T. 13 S., R. 1 W. Calhoun County, Illinois. Circa 1928. Plate 13-A, in U.S.Geological Survey Professional Paper 218. 1952. #1:/Illinois-Professional paper 218/rww00206 ID. Rubey. W.W. 206 "Dug Hill" old road bordered by vertical banks of loess, SE ¼ sec.16, T. 7 N., R. 13 W. Jersey County, Illinois. Circa 1928. Plate 13-B, in U.S.Geological Survey Professional Paper 218. 1952. #1:/Illinois-Professional paper 218/rww00208 ID. Rubey. W.W. 208 Form a panorama of reddish-brown (late Sangmon?) loess overlain by light buff (early Peorian?) loess with a humus-stained (old soil) zone at contact, SE ¼ NE ¼ sec. 11, T. 7 N., R. 13 W. Jersey County, Illinois. Circa 1928. Plate 13-C, in U.S.Geological Survey Professional Paper 218. 1952. #1:/Illinois-Professional paper 218/rww00209 ID. Rubey. W.W. 209 Form a panorama of reddish-brown (late Sangmon?) loess overlain by light buff (early Peorian?) loess with a humus-stained (old soil) zone at contact, SE ¼ NE ¼ sec. 11, T. 7 N., R. 13 W. Jersey County, Illinois. Circa 1928. Plate 13-C, in U.S.Geological Survey Professional Paper 218. 1952. #1:/Illinois-Professional paper 218/rww00212 ID. Rubey. W.W. 212 Local stream gravels overlain by loess, SW ¼ NE ¼ sec. 35, T. 9 S. R.3 W. Calhoun County, Illinois. Circa 1928. Plate 14-A, in U.S.Geological Survey Professional Paper 218. 1952. #1:/Illinois-Professional paper 218/rww00213 ID. Rubey. W.W. 213 Recent alluvium deposited by the Mississippi River, SE ¼ sec. 25, T. 11 S., R. 3 W. Plate 14-B, in U.S.Geological Survey Professional Paper 218. 1952. #1:/Illinois-Professional paper 218/rww00214 ID. Rubey. W.W. 214 Form a panoramic view northward from Spankey Hill showing flood plain of Illinois River and uplands of sec. 21, T. 9 N., R. 13 W. Green County, Illinois. Circa 1928. Plate 16-A, in U.S.Geological Survey Professional Paper 218. 1952. #1:/Illinois-Professional paper 218/rww00215 ID. Rubey. W.W. 215 Form a panoramic view northward from Spankey Hill showing flood plain of Illinois River and uplands of sec. 21, T. 9 N., R. 13 W. Greene County, Illinois. Circa 1928. Plate 16-A, in U.S.Geological Survey Professional Paper 218. 1952. #1:/Illinois-Professional paper 216/rww00216 ID. Rubey. W.W. 216 Form a panoramic view southeast and south from Spankey Hill showing lower part of valley of Macoupin Creek and Illinoian till plain upland as the distant sky line. Greene County, Illinois. Circa 1928. Plate 16-B, in U.S.Geological Survey Professional Paper 218. 1952. #1:/Illinois-Professional paper 216/rww00217 ID. Rubey. W.W. 217 Form a panoramic view southeast and south from Spankey Hill showing lower part of valley of Macoupin Creek and Illinoian till plain upland as the distant sky line. Greene County, Illinois. Circa 1928. Plate 16-B, in U.S.Geological Survey Professional Paper 218. 1952. #1:/Illinois-Professional paper 219/rww00219 ID. Rubey. W.W. 219 Form a panoramic view southward from NW ¼ SE ¼ sec. 21, T. 9 N., R. 13 W., showing part of Brussels terrace in foreground and Spankey Hill and flood plain of Illinois River in background. Greene County, Illinois. Circa 1928. Plate 17-A, in U.S.Geological Survey Professional Paper 218. 1952. #1:/Illinois-Professional paper 219/rww00220 ID. Rubey. W.W. 220 Form a panoramic view southward from NW ¼ SE ¼ sec. 21, T. 9 N., R. 13 W., showing part of Brussels terrace in foreground and Spankey Hill and flood plain of Illinois River in background. Greene County, Illinois. Circa 1928. Plate 17-A, in U.S.Geological Survey Professional Paper 218. 1952. #1:/Illinois-Professional paper 219/rww00221 ID. Rubey. W.W. 221 Form a panoramic view southeast, south and southwest from NE ¼ SW ¼ sec. 22 T. 9 N., R. 13 W., showing Brussels terrace and abandoned stream channel in foreground and valley of Macoupin Creek and Spankey Hill in distance. Greene County, Illinois. Circa 1928. Plate 17-B, in U.S.Geological Survey Professional Paper 218. 1952. #1:/Illinois-Professional paper 219/rww00222 ID. Rubey. W.W. 222 Form a panoramic view southeast, south and southwest from NE ¼ SW ¼ sec. 22 T. 9 N., R. 13 W., showing Brussels terrace and abandoned stream channel in foreground and valley of Macoupin Creek and Spankey Hill in distance. Greene County, Illinois. Circa 1928. Plate 17-B, in U.S.Geological Survey Professional Paper 218. 1952. #1:/Illinois-Professional paper 219/rww00223 ID. Rubey. W.W. 223 A part of Brussels terrace view southwestward from town of Brussels, Calhoun County, Illinois. Circa 1928. Plate 18-A, in U.S.Geological Survey Professional Paper 218. 1952. #1:/Illinois-Professional paper 219/rww00224 ID. Rubey. W.W. 224 Margin of Brussels terrace viewed westward from Deer Plain in east center SE ¼ sec. 17, T. 13 S., R. 1 W. Calhoun County, Illinois. Circa 1928. Plate 18-B, in U.S.Geological Survey Professional Paper 218. 1952. #1:/Illinois-Professional paper 219/rww00225 ID. Rubey. W.W. 225 East margin of Deer Plain terrace in NE ¼ sec. 21, T. 13 S., R. 1 W. Calhoun County, Illinois. Circa 1928. Plate 19-A, in U.S.Geological Survey Professional Paper 218. 1952. #1:/Illinois-Professional paper 219/rww00226 ID. Rubey. W.W. 226 East margin of Deer Plain terrace, viewed northward of recent flood plain in SW ¼ sec. 22, T. 13 S, R. 1 W. Calhoun County, Illinois. Circa 1928. Plate 19-B, in U.S.Geological Survey Professional Paper 218. 1952. #1:/Illinois-Professional paper 219/rww00227 ID. Rubey. W.W. 227 Gently sloping alluvial fans at foot of bluffs on eastern side of flood plain in Illinois River, view northward from center NE ¼ sec. 20 T. 8 N., R. 13 W. Jersey County, Illinois. Circa 1928. Plate 19-C, in U.S.Geological Survey Professional Paper 218. 1952. #1:/Illinois-Professional paper 218/rww00228 ID. Rubey. W.W. 228 A hill that slopes landward from bluff along Illinois River, evidence of lateral erosion by river, three miles north of Hardin, Calhoun County, Illinois. Circa 1928. This photo is the basis for figure 9, in U.S.Geological Survey Professional Paper 218. 1952. #1:/Colorado-Professional paper 219/eeb00024 ID. Eckel, E.B. 24 At head of Boren Creek showing monzonite stock, lines on published photo show boundary of stock; Spiller and Burwell Peaks are in upper left and right corners. The jagged pinnacles along the gulch in the foreground are due to erosion of strongly altered and pyritized rocks of various kinds, view looking north from ridge east of Burwell Peak. La Plata County, Colorado. Circa 1936. Plate 4, in U.S.Geological Survey Professional Paper 219. 1949. #1:/Colorado-Professional paper 219/eeb00025 ID. Eckel, E.B. 25 Sketch of the view in Eckel 36, identifying important geologic features. Montezuma County, Colorado. Circa 1936. Plate 7-B, in U.S.Geological Survey Professional Paper 219. 1949. #1:/Colorado-Professional paper 219/eeb00026 ID. Eckel, E.B. 26 Typical exposure of Entrada sandstone on west side of Junction Creek, the thin Pony Express limestone member of the Wanakah formation caps the sandstone. This view also shows the character of the vegetation in much of the La Plata district; 2.5 miles below mouth of Castle Creek. La Plata County, Colorado. Circa 1936. Plate 3-A, in U.S.Geological Survey Professional Paper 219. 1949. #1:/Colorado-Professional paper 219/eeb00027 ID. Eckel, E.B. 27 Dolores formation on west side of Junction Creek, the white cliff at the top is Entrada sandstone. This is the best-exposed section of the Dolores in the district; view 1.3 miles below mouth of Castle Creek. La Plata County, Colorado. Circa 1936. Plate 3-B, in U.S.Geological Survey Professional Paper 219. 1949. #1:/Colorado-Professional paper 219/eeb00028 ID. Eckel, E.B. 28 Textures of intrusive breccias, composed of various rock fragments in a matrix of fine- grained rock: From Miller tunnel of Incas Mine, black fragments are Pony express limestone of Wanakah formation; light fragments are porphyry. Colorado. Circa 1936. Plate 5-A, in U.S.Geological Survey Professional Paper 219. 1949. #1:/Colorado-Professional paper 219/eeb00029 ID. Eckel, E.B. 29 Textures of intrusive breccias, composed of various rock fragments in a matrix of fine- grained rock: From Daisy Mine, fragments consist of mudstone, sandstone and altered porphyry. Colorado. Circa 1936. Plate 5-B, in U.S.Geological Survey Professional Paper 219. 1949. #1:/Colorado-Professional paper 219/eeb00030 ID. Eckel, E.B. 30 View of western Cumberland basin, looking down Columbus basin, in the foreground a typical U-shaped glaciated valley, somewhat modified by talus accumulations. The Entrada sandstone forms Indian Trail Ridge in the background, Cumberland Basin is carved from unmetamorphosed red beds of the Cutler and Dolores formations, view from Columbus mine. La Plata County, Colorado. Circa 1936. Plate 5-C, in U.S.Geological Survey Professional Paper 219. 1949. #1:/Colorado-Professional paper 219/eeb00031 ID. Eckel, E.B. 31 Form a panoramic view of Cumberland and Columbus basins, the sharp hinge fold that characterizes the La Plata dome passes down the left side of Columbus Basin but is obscured by the large porphyry mass on Snowstorm Peak (Cumberland Mountain and Snowstorm Peak are left and right respectively in photo 32). These basins and the one at the head of the South Fork Hermosa Creek shown in the left foreground have been glaciated; view looking southeast from Indian Trail Ridge. La Plata County, Colorado. Circa 1936. Plate 6-A, in U.S.Geological Survey Professional Paper 219. 1949. #1:/Colorado-Professional paper 219/eeb00032 ID. Eckel, E.B. 32 Form a panoramic view of Cumberland and Columbus basins, the sharp hinge fold that characterizes the La Plata dome passes down the left side of Columbus Basin but is obscured by the large porphyry mass on Snowstorm Peak (Cumberland Mountain and Snowstorm Peak are left and right respectively in photo 32). These basins and the one at the head of the South Fork Hermosa Creek shown in the left foreground have been glaciated; view looking southeast from Indian Trail Ridge. La Plata County, Colorado. Circa 1936. Plate 6-A, in U.S.Geological Survey Professional Paper 219. 1949. #1:/Colorado-Professional paper 219/eeb00033 ID. Eckel, E.B. 33 Form a panoramic view of Cumberland and Columbus basins, the sharp hinge fold that characterizes the La Plata dome passes down the left side of Columbus Basin but is obscured by the large porphyry mass on Snowstorm Peak (Cumberland Mountain and Snowstorm Peak are left and right respectively in photo 32). These basins and the one at the head of the South Fork Hermosa Creek shown in the left foreground have been glaciated; view looking southeast from Indian Trail Ridge. La Plata County, Colorado. Circa 1936. Plate 6-A, in U.S.Geological Survey Professional Paper 219. 1949. #1:/Colorado-Professional paper 219/eeb00034 ID. Eckel, E.B. 34 Form a panoramic view of upper parts of Tomahawk and Bear Creek Basins. The rugged forms of Babcock Peak and Mount Moss are due to erosion of monzonite. Several porphyry sills show clearly on Banded Mountain (right side of photo 35). Sedimentary rocks, all of them metamorphosed, belong to Upper Jurassic and Upper Cretaceous formations. The glaciated rock floors of the basin are exposed in a few places through the characteristically heavy accumulations of talus. View looking west from Diorite Peak with Tomahawk Basin on left. La Plata County, Colorado. Circa 1936. Plate 6-B, in U.S.Geological Survey Professional Paper 219. 1949. #1:/Colorado-Professional paper 219/eeb00035 ID. Eckel, E.B. 35 Form a panoramic view of upper parts of Tomahawk and Bear Creek Basins. The rugged forms of Babcock Peak and Mount Moss are due to erosion of monzonite. Several porphyry sills show clearly on Banded Mountain (right side of photo 35). Sedimentary rocks, all of them metamorphosed, belong to Upper Jurassic and Upper Cretaceous formations. The glaciated rock floors of the basin are exposed in a few places through the characteristically heavy accumulations of talus. View looking west from Diorite Peak with Tomahawk Basin on left. La Plata County, Colorado. Circa 1936. Plate 6-B, in U.S.Geological Survey Professional Paper 219. 1949. #1:/Colorado-Professional paper 219/eeb00036 ID. Eckel, E.B. 36 View showing a part of the steep fold that characterizes the La Plata Dome, at the extreme right, the beds dip steeply toward the west but on Jackson Ridge they are nearly horizontal. Looking northeast from Helmet Peak to Spiller and Hesperus Peaks. Montezuma County, Colorado. Circa 1936. Plate 7-A, in U.S.Geological Survey Professional Paper 219. 1949. #1:/Colorado-Professional paper 219/eeb00037 ID. Eckel, E.B. 37 Polished slab from breccia body near Little Kate mine on Basin Creek; fragments of diorite; porphyry, and sedimentary rock: in a matrix of fine-grained rock. The dark grains are largely chlorite, magnetite and specular hematite. La Plata County, Colorado. Circa 1936. Plate 8-C, in U.S.Geological Survey Professional Paper 219. 1949. #1:/Colorado-Professional paper 219/eeb00038 ID. Eckel, E.B. 38 Polished slab of low-grade copper bearing and platinum bearing metamorphic rock: from Copper Hill glory hole. The light colored layers consist of feldspar, the dark ones of fine crystalline augite. The veinlets and the disseminated grains are largely chalcopyrite; two- thirds natural size. La Plata County, Colorado. Circa 1936. Plate 8-A, in U.S.Geological Survey Professional Paper 219. 1949. #1:/Colorado-Professional paper 219/eeb00039 ID. Eckel, E.B. 39 Photograph of specimen of diorite-monzonite porphyry; partly replaced by syenite; diorite-monzonite porphyry; syenite. Ghosts of original feldspar phenocrysts can be seen in several places, especially in the indistinct "vein" of syenite that appears in large porphyry remnant at right; specimen from near La Plata River, opposite La Plata. La Plata County, Colorado. Circa 1936. Plate 8-B, in U.S.Geological Survey Professional Paper 219. 1949. #1:/Colorado-Professional paper 219/eeb00040 ID. Eckel, E.B. 40 Close-up photographs of igneous rocks and partly replaced sedimentary rock, Boren Creek area. Syenite in bed of Boren Creek cut by seams of aplite. La Plata County, Colorado. Circa 1936. Plate 9-A, in U.S.Geological Survey Professional Paper 219. 1949. #1:/Colorado-Professional paper 219/eeb00041 ID. Eckel, E.B. 41 Close-up photographs of igneous rocks and partly replaced sedimentary rock, Boren Creek area. Sedimentary rock partly replaced by monzonite; the sedimentary rock (dark gray), probably a shale originally, contains numerous veinlets of monzonite (light gray); from exposure near head of Boren Creek. La Plata County, Colorado. Circa 1936. Plate 9-B, in U.S.Geological Survey Professional Paper 219. 1949. #1:/Colorado-Professional paper 219/eeb00042 ID. Eckel, E.B. 42 Gold King mill, shows tailings pile in left foreground and glacial cirques of Silver Mountain in the distance. La Plata County, Colorado. Circa 1936. Plate 21, in U.S.Geological Survey Professional Paper 219. 1949. #1:/Colorado-Professional paper 219/eeb00088 ID. Eckel, E.B. 88 Photomicrograph of polished sections of ore: irregular masses and veinlets of native gold in hessite. Native gold; hessite, reflected light enlarged 150 x. Lucky Discovery mine. Photo by F.W. Galbraith. La Plata County, Colorado. Circa 1936. Plate 10-A, in U.S.Geological Survey Professional Paper 219. 1949. #1:/Colorado-Professional paper 219/eeb00089 ID. Eckel, E.B. 89 Photomicrograph of polished sections of ore: Tetrahedrite replaced by hessite. Tetraedrite hessite; gangue is quartz; reflected light enlarged 60 x. Durango Girl mine. Photo by F.W. Galbraith. La Plata County, Colorado. Circa 1936. Plate 10-B, in U.S.Geological Survey Professional Paper 219. 1949. #1:/Colorado-Professional paper 219/eeb00090 ID. Eckel, E.B. 90 Photomicrograph of polished sections of ore: subgraphic pattern of calaverite and sylvanite in hessite, Calaverite, sylvanite and hessite. These textures may indicate replacement of hessite by gold tellurides, but owing to its rarity, such replacement is not believed to be important in La Plata ores. Reflected light 250 x. Gold King mine. Photo by F.W. Galbraith. La Plata County, Colorado. Circa 1936. Plate 10-C, in U.S.Geological Survey Professional Paper 219. 1949. #1:/Colorado-Professional paper 219/eeb00091 ID. Eckel, E.B. 91 Photomicrograph of polished sections of ore: subgraphic pattern of calaverite and sylvanite in hessite, Calaverite, sylvanite and hessite. These textures may indicate replacement of hessite by gold tellurides, but owing to its rarity, such replacement is not believed to be important in La Plata ores. Reflected light 250 x. Gold King mine. Photo by F.W. Galbraith. La Plata County, Colorado. Circa 1936. Plate 10-D, in U.S.Geological Survey Professional Paper 219. 1949. #1:/Colorado-Professional paper 219/eeb00092 ID. Eckel, E.B. 92 Photomicrograph of polished sections of ore: Intergrowth of krennerite and native tellurium; specimen etched with concentrated HNO3; cleavage pattern produced by etching is characteristic of krennerite. Gangue is quartz; reflected light 180 x. Gold King mine. Photo by F.W. Galbraith. La Plata County, Colorado. Circa 1936. Plate 11-A, in U.S.Geological Survey Professional Paper 219. 1949. #1:/Colorado-Professional paper 219/eeb00093 ID. Eckel, E.B. 93 Photomicrograph of polished sections of ore: boxwork structure of magnetite; chalcopyrite has filed in boxwork and veinlet of pyrite cuts magnetite. Reflected light 80 x. Bay City mine. Photo by F.W. Galbraith. La Plata County, Colorado. Circa 1936. Plate 11-B, in U.S.Geological Survey Professional Paper 219. 1949. #1:/Colorado-Professional paper 219/eeb00094 ID. Eckel, E.B. 94 Photomicrograph of polished sections of ore: Galena replaced b sphalerite along cleavage traces, galena; sphalerite; reflected light 75 x. Gold King mine., Photo by F.W. Galbraith. La Plata County, Colorado. Circa 1936. Plate 12-A, in U.S.Geological Survey Professional Paper 219. 1949. #1:/Colorado-Professional paper 219/eeb00095 ID. Eckel, E.B. 95 Photomicrograph of polished sections of ore: galena replaced by super gene cerussite. Replacement by super gene cerussite, along boundaries between grains of galena and quartz and along traces of galena, reflected light 60x; Gold King mine. Photo by F.W. Galbraith. La Plata County, Colorado. Circa 1936. Plate 12-B, in U.S.Geological Survey Professional Paper 219. 1949. #1:/Colorado-Professional paper 219/eeb00096 ID. Eckel, E.B. 96 Photomicrograph of polished sections of ore: hypogene chalcopyrite replaced by supergene bornite; Chalcopyrite, bornite; reflected light 175 x. Neglected mine. Photo by F.W. Galbraith. La Plata County, Colorado. Circa 1936. Plate 12-C, in U.S.Geological Survey Professional Paper 219. 1949. #1:/Colorado-Professional paper 219/eeb00097 ID. Eckel, E.B. 97 Photomicrograph of polished sections of ore: supergene gold veinlets deposited in fractures in hessite. Surface etched with #1:1 HNO3; large area of white mineral unaffected by acid is coloradoite. Gangue is quartz; reflected light 157 x. Eagle Pass mine. Photo by F.W. Galbraith. La Plata County, Colorado. Circa 1936. Plate 12-D, in U.S.Geological Survey Professional Paper 219. 1949. #1:/Arizona-Professional paper 220/ajc00004 ID. Anderson, J.C. 4 The Steamboat on highway between Fredonia and Pipe Spring an outlier f the Shinarump Cliffs. Upper part of the Moenkopi formation capped by Shinarump conglomerate. Coconino County, Arizona. 1934. Figure 31, in U.S.Geological Survey Professional Paper 220. 1950. #1:/Utah-Professional paper 220/ajc00011 ID. Anderson, J.C. 11 Sevier fault, along face of Elkheart Cliffs (at top) near Heaton Point; Tropic formation – slope in foreground – rests against a nearly vertical wall of Navajo sandstone (in right center). Kane County, Utah. 1936. Figure 87, with graphics, in U.S.Geological Survey Professional Paper 220. 1950. #1:/Utah-Professional paper 220/ajc00028 ID. Anderson, J.C. 28 The upper redbeds in the Moenkopi formation at Isom Wash: Washington County, Utah. 1937. Figure 32, in U.S.Geological Survey Professional Paper 220. 1950. #1:/Utah-Professional paper 220/ajc00033 ID. Anderson, J.C. 33 Basalt, north side of valley of Virgin River west of Grafton: possible center of eruption. Kane County, Utah. 1937. Figure 76, in U.S.Geological Survey Professional Paper 220. 1950. #1:/Utah-Professional paper 220/ajc00042 ID. Anderson, J.C. 42 Top of Markagunt Plateau back of Pink Cliffs, park like areas of well-watered meadowlands, chiefly grasses and annuals bordered by forests of aspen, spruce and fir. Iron County, Utah. 1936. Figure 10, in U.S.Geological Survey Professional Paper 220. 1950. #1:/Utah-Professional paper 220/ajc00057 ID. Anderson, J.C. 57 Carmel formation, basal limestone underlain by shales that in contact with Navajo sandstone: Mount Carmel Junction, Kane County, Utah. 1938. Figure 55, in U.S.Geological Survey Professional Paper 220. 1950. #1:/Utah-Professional paper 220/ajc00058 ID. Anderson, J.C. 58 Basalt flow (center) passing over a cliff of Navajo sandstone: southwest of Pine Spring on Kolob Terrace. Washington County, Utah. 1938. Figure 77, in U.S.Geological Survey Professional Paper 220. 1950. #1:/Utah-Professional paper 220/ajc00060 ID. Anderson, J.C. 60 Glen Canyon group in Kanab Canyon: Wingate, Kayenta (middle slope) and basal Navajo, near Robinson Ranch. Kane County, Utah. 1938. Figure 40, in U.S.Geological Survey Professional Paper 220. 1950. #1:/Utah-Professional paper 220/ajc00072 ID. Anderson, J.C. 72 Straight Cliffs sandstone, part of massive bed about 80 feet thick. Tropic formation below, at right, Clear Creek Mountain. Kane County, Utah. 1938. Figure 66, in U.S.Geological Survey Professional Paper 220. 1950. #1:/Utah-Professional paper 220/ajc00079 ID. Anderson, J.C. 79 General view of Pink Cliffs (Wasatch formation): near head of Virgin River, Kane County, Utah. 1938. Figure 69, in U.S.Geological Survey Professional Paper 220. 1950. #1:/Utah-Professional paper 220/dut00027 ID. Dutton, C.E. 27 Terraces bounding Virgin River near Grafton, the lowest terrace is stratified alluvium, the next highest of consolidated gravel, the upper two of rock thickly coated with gravel. Moenkopi strata (middle distance), Navajo strata partly covered by landslides in Smithsonian Butte (top). Photograph from a painting by W.H. Holmes 1872, reproduced from Dutton, Geology of the Grand Canyon District, frontispiece. 1882. Figure 103, in U.S.Geological Survey Professional Paper 220. 1950. #1:/Utah-Professional paper 220/rgb0185a ID. Richardson, G.B. 185a Tropic formation, branch of La Verkin Creek, south of Duck Lake. Kane County, Utah. Prior to 1939. Figure 63, in U.S.Geological Survey Professional Paper 220. 1950. #1:/Utah-Professional paper 220/rgb00191 ID. Richardson, G.B. 191 Sevier fault at Orderville, in gap just north of village the fault separates the Straight Cliffs sandstone and Tropic formation at left, from upper part of Navajo sandstone and Carmel in Elkheart Cliffs at right. Kane County, Utah. prior to 1939. Figure 86, in U.S.Geological Survey Professional Paper 220. 1950. #1:/Palau Islands-Professional paper 221/cws00083 ID. Cole, W.S. 83 Larger foraminifer of the Palau Islands. Plate 5 in U.S. Geological Survey. Professional paper 221. 1950. #1:/Palau Islands-Professional paper 221/cws00084 ID. Cole, W.S. 84 Larger foraminifer of the Palau Islands. Plate 6 in U.S. Geological Survey. Professional paper 221. 1950. #1:/Texas-Professional paper 221/sig00038 ID. Sohn, I.G. 38 Permian Ostracodes from, Glass Mountains, Texas: Form plate 7 in U.S. Geological Survey. Professional paper 221. 1950. #1:/Texas-Professional paper 221/sig00039 ID. Sohn, I.G. 39 Permian Ostracodes from, Glass Mountains, Texas: Form plate 7 in U.S. Geological Survey. Professional paper 221. 1950. #1:/Texas-Professional paper 221/sig00040 ID. Sohn, I.G. 40 Permian Ostracodes from, Glass Mountains, Texas: Form plate 8 in U.S. Geological Survey. Professional paper 221. 1950. #1:/Texas-Professional paper 221/sig00041 ID. Sohn, I.G. 41 Permian Ostracodes from, Glass Mountains, Texas: Form plate 8 in U.S. Geological Survey. Professional paper 221. 1950. #1:/Arkansas-Professional paper 221/hta00001 ID. Hendricks, T.A. 1 Aerial photograph of the west end of the Washburn anticline; note the strong asymmetry of the fold and that the prominent ridge in the center disappears in to the belt of steep dips in the northeast corner. Photograph courtesy of Agricultural Adjustment Administration. Sebastian County, Arkansas. 1936. Plate 15, in U.S.Geological Survey Professional Paper 221. 1950. #1:/Arkansas-Professional paper 221/hta00002 ID. Hendricks, T.A. 2 Aerial photograph showing hairpin ridge in the Chismville syncline, outward facing scarp is formed by the closure of a sandstone bed in the McAlester shale across the axis of the westward-plunging Chismville syncline about 10 miles southwest of Paris. Photograph courtesy of Agricultural Adjustment Administration. Logan, Arkansas. 1936. Plate 16, in U.S.Geological Survey Professional Paper 221. 1950. #1:/Saber tooth Carnivore- Professional paper 221/hou00001 ID. Hough, J. 1 Hoplophoneus Mentalis Sinclair, side view of skull and lower jaw; mounted by John Clark, Courtesy of Colorado University. Plate 26, in U.S.Geological Survey Professional Paper 221. 1950. #1:/Saber tooth Carnivore- Professional paper 221/hou00002 ID. Hough, J. 2 Hoplophoneus Mentalis Sinclair, side of skeleton; mounted by John Clark, Courtesy of Colorado University. Plate 27, in U.S.Geological Survey Professional Paper 221. 1950. #1:/Saber tooth Carnivore- Professional paper 221/hou00003 ID. Hough, J. 3 Hoplophoneus Mentalis Sinclair, antero-lateral view of mounted skeleton; mounted by John Clark, Courtesy of Colorado University. Plate 28, in U.S.Geological Survey Professional Paper 221. 1950. #1:/Saber tooth Carnivore- Professional paper 221/hou00004 ID. Hough, J. 4 Fore limb bones of Hoplophoneus primaevus latidens Thorpe. U.S. National Museum. Washington, DC. Plate 29, in U.S.Geological Survey Professional Paper 221. 1950 #1:/California-Professional paper 222/wwp00154 ID. Woodring, W.P. 154 Sisquoc formation and Careaga sandstone: burrows extending from base of Cebada fine- grained member of Careaga sandstone into Sisquoc formation, near Union Oil Co., Squires No. 18 well, Orcutt field. Santa Barbara County, California. Circa 1939. Figure 6-C, in U.S.Geological Survey Professional Paper 222. 1950. #1:/California-Professional paper 222/wwp00155 ID. Woodring, W.P. 155 Sisquoc formation and Careaga sandstone: burrows extending from tar sand at base of Graciosa coarse-grained member of Careaga sandstone into Sisquoc formation, near Union Oil Co. Folsom No. 3 well, Orcutt field. Santa Barbara County, California. Circa 1939. Figure 6-D, in U.S.Geological Survey Professional Paper 222. 1950. #1:/California-Professional paper 222/wwp00156 ID. Woodring, W.P. 156 Careaga sandstone, Paso Robles formation and Orcutt sand: tar sand and gravel of Graciosa coarse-grained member of the Careaga sandstone and underlying diatomaceous mudstone of Sisquoc formation, Graciosa Ridge, near Union Oil Co. Newlove No. 13 well, Orcutt field. Santa Barbara County, California. Circa 1939. Figure 7-A, in U.S.Geological Survey Professional Paper 222. 1950. #1:/California-Professional paper 222/wwp00157 ID. Woodring, W.P. 157 Careaga sandstone, Paso Robles formation and Orcutt sand: Orcutt sand and Paso Robles formation, railroad cut near Shuman. Gravel and sand of Orcutt dip a few degrees away from observer, Paso Robles formation dips 45 degrees to left (full dip 65 degrees). Santa Barbara County, California. Circa 1939. Figure 7-B, in U.S.Geological Survey Professional Paper 222. 1950. #1:/California-Professional paper 222/wwp00160 ID. Woodring, W.P. 160 Structural and physiographic features of Casmalia Hills and Graciosa Ridge: Orcutt sand (to left of gap) faulted against Sisquoc formation, north slope of Graciosa Ridge. Santa Barbara County, California. Circa 1939. Figure 8-C, in U.S.Geological Survey Professional Paper 222. 1950. #1:/California-Professional paper 222/wwp00161 ID. Woodring, W.P. 161 Lospe formation and Monterey shale in Casmalia Hills: Tuff in Lospe formation on south slope of Mount Lospe. Tuff forming cliff in middle view is 50 feet thick. Santa Barbara County, California. Circa 1939. Figure 3-B, in U.S.Geological Survey Professional Paper 222. 1950. #1:/California-Professional paper 222/wwp00163 ID. Woodring, W.P. 163 Monterey shale in Casmalia Hills: slightly overturned shale, sandstone (light colored), and conglomerate and breccia (at hammer) in lower member of Monterey shale on coast near Lions Head. Santa Barbara County, California. Circa 1939. Figure 4-A, in U.S.Geological Survey Professional Paper 222. 1950. #1:/California-Professional paper 222/wwp00166 ID. Woodring, W.P. 166 Structural and physiographic features of Casmalia Hills and Graciosa Ridge: Lions Head fault, Casmalia Hills. Ledge forming igneous rocks of the Franciscan formation on foot wall, lower member of Monterey shale on hanging wall. Santa Barbara County, California. Circa 1939. Figure 8-B, in U.S.Geological Survey Professional Paper 222. 1950. #1:/California-Professional paper 222/wwp00167 ID. Woodring, W.P. 167 Physiographic features of Casmalia Hills: Intermediate marine terrace. Santa Barbara County, California. Circa 1939. Figure 9-B, in U.S.Geological Survey Professional Paper 222. 1950. #1:/California-Professional paper 222/wwp00168 ID. Woodring, W.P. 168 Physiographic features of Casmalia Hills: landslide on north slope of western Casmalia Hills. Santa Barbara County, California. Circa 1939. Figure 9-D, in U.S.Geological Survey Professional Paper 222. 1950. #1:/California-Professional paper 222/wwp00188 ID. Woodring, W.P. 188 Sand dollars and mollusks from Tinaquaic sandstone member of Sisquoc formation. California. Plate 7, in U.S.Geological Survey Professional Paper 222. 1950. #1:/California-Professional paper 222/wwp00189 ID. Woodring, W.P. 189 Mollusks from basin facies of Sisquoc formation. California. Plate 8, in U.S.Geological Survey Professional Paper 222. 1950. #1:/California-Professional paper 222/wwp00190 ID. Woodring, W.P. 190 Mollusks from basin facies of Sisquoc formation. California. Plate 9, in U.S.Geological Survey Professional Paper 222. 1950. #1:/California-Professional paper 222/wwp00191 ID. Woodring, W.P. 191 Sand dollars and mollusks from Foxen mudstone. California. Plate 10, in U.S.Geological Survey Professional Paper 222. 1950. #1:/California-Professional paper 222/wwp00192 ID. Woodring, W.P. 192 Mollusks from Foxen mudstone. California. Plate 11, in U.S.Geological Survey Professional Paper 222. 1950. #1:/California-Professional paper 222/wwp00193 ID. Woodring, W.P. 193 Mollusks from Cebada fine-grained member of Careaga sandstone. California. Plate 12, in U.S.Geological Survey Professional Paper 222. 1950. #1:/California-Professional paper 222/wwp00194 ID. Woodring, W.P. 194 Brachiopods and mollusks from Cebada fine-grained member of Careaga sandstone. California. Plate 13, in U.S.Geological Survey Professional Paper 222. 1950. #1:/California-Professional paper 222/wwp00195 ID. Woodring, W.P. 195 Mollusks and barnacles from Cebada fine-grained member of Careaga sandstone and fine-grained facies of undifferentiated Careaga sandstone. California. Plate 14, in U.S.Geological Survey Professional Paper 222. 1950. #1:/California-Professional paper 222/wwp00196 ID. Woodring, W.P. 196 Mollusks from Cebada fine-grained member of Careaga sandstone. California. Plate 15, in U.S.Geological Survey Professional Paper 222. 1950. #1:/California-Professional paper 222/wwp00197 ID. Woodring, W.P. 197 Mollusks and barnacles from Cebada fine-grained member of Careaga sandstone and fine-grained facies of undifferentiated Careaga sandstone. California. Plate 16, in U.S.Geological Survey Professional Paper 222. 1950. #1:/California-Professional paper 222/wwp00198 ID. Woodring, W.P. 198 Sand dollars and mollusks from Graciosa coarse-grained member of Careaga sandstone. California. Plate 17, in U.S.Geological Survey Professional Paper 222. 1950. #1:/California-Professional paper 222/wwp00199 ID. Woodring, W.P. 199 Sand dollars and mollusks from Graciosa coarse-grained member of Careaga sandstone and mollusks from Paso Robles formation. California. Plate 18, in U.S.Geological Survey Professional Paper 222. 1950. #1:/California-Professional paper 222/wwp00200 ID. Woodring, W.P. 200 Sand dollars and mollusks from Graciosa coarse-grained member of Careaga sandstone. California. Plate 19, in U.S.Geological Survey Professional Paper 222. 1950. #1:/California-Professional paper 222/wwp00201 ID. Woodring, W.P. 201 Sand dollars and mollusks from Graciosa coarse-grained member of Careaga sandstone and from coarse-grained facies of undifferentiated Careaga sandstone. California. Plate 20, in U.S.Geological Survey Professional Paper 222. 1950. #1:/California-Professional paper 222/wwp00202 ID. Woodring, W.P. 202 Mollusks from Careaga sandstone. California. Plate 20, in U.S.Geological Survey Professional Paper 222. 1950. #1:/California-Professional paper 222/wwp00227 ID. Woodring, W.P. 227 Monterey shale and Sisquoc formation: Upper member of Monterey shale in Casmalia Hills. Upper member forms strike ridge in middle of view and the Sisquoc formation forms the hills at right. Santa Barbara County, California. Circa 1939. Figure 5-A, in U.S.Geological Survey Professional Paper 222. 1950. #1:/California-Professional paper 222/wwp00228 ID. Woodring, W.P. 228 Monterey shale and Sisquoc formation: Upper member of Monterey shale and Sisquoc formation in Casmalia Hills. Transition zone between the formations is on spur in middle of the view above the lower group of trees. Santa Barbara County, California. Circa 1939. Figure 5-B, in U.S.Geological Survey Professional Paper 222. 1950. #1:/California-Professional paper 222/wwp00229 ID. Woodring, W.P. 229 Monterey shale and Sisquoc formation: Siltstone and sandstone in transition zone between Sisquoc formation and Careaga sandstone on north slope of Gato Ridge. The siltstone (under hammer) is lighter colored than the sandstone. Santa Barbara County, California. Circa 1939. Figure 5-D, in U.S.Geological Survey Professional Paper 222. 1950. #1:/California-Professional paper 222/wwp00230 ID. Woodring, W.P. 230 Sisquoc formation and Careaga sandstone: Intrusive tar in Cebada fine-grained member of Careaga sandstone at fossil locality, near Union Oil Co. Newlove No. 42 well Orcutt field. Santa Barbara County, California. Circa 1939. Figure 6-B, in U.S.Geological Survey Professional Paper 222. 1950. #1:/California-Professional paper 222/wwp00231 ID. Woodring, W.P. 231 Careaga sandstone, Paso Robles formation and Orcutt sand: Orcutt sand on U.S. Highway 101, 7.5 miles southeast of Santa Maria. Santa Barbara County, California. Circa 1939. Figure 7-C, in U.S.Geological Survey Professional Paper 222. 1950. #1:/California-Professional paper 222/wwp00232 ID. Woodring, W.P. 232 Structural and physiographic features of Casmalia Hills and Graciosa Ridge: Minor anticline in middle member of Monterey shale, Casmalia Hills, Casmalia in middle background. Santa Barbara County, California. Circa 1939. Figure 8-A, in U.S.Geological Survey Professional Paper 222. 1950. #1:/California-Professional paper 222/wwp00233 ID. Woodring, W.P. 233 Structural and physiographic features of Casmalia Hills and Graciosa Ridge: lowest marine terrace, Casmalia Hills. Lions Head in middle background. Santa Barbara County, California. Circa 1939. Figure 8-D, in U.S.Geological Survey Professional Paper 222. 1950. #1:/California-Professional paper 222/wwp00234 ID. Woodring, W.P. 234 Physiographic features of Casmalia Hills: Intermediate marine terrace. Santa Barbara County, California. Circa 1939. Figure 9-A, in U.S.Geological Survey Professional Paper 222. 1950. #1:/California-Professional paper 222/wwp00235 ID. Woodring, W.P. 235 Physiographic features of Casmalia Hills, high-level marine terrace and fluted sand of nonmarine terrace cover. Santa Barbara County, California. Circa 1939. Figure 9-C, in U.S.Geological Survey Professional Paper 222. 1950. #1:/California-Professional paper 222/wwp00236 ID. Woodring, W.P. 236 Monterey shale on south slope of Casmalia Hills; lower member in foreground, ledge forming middle member in mid-background, upper member in far background. Santa Barbara County, California. Circa 1939. Figure 4-B, in U.S.Geological Survey Professional Paper 222. 1950. #1:/California-Professional paper 222/wwp00237 ID. Woodring, W.P. 237 Monterey shale in Casmalia Hills: Cherty shale and chert in middle member of Monterey shale on coast near Lions Head. Santa Barbara County, California. Circa 1939. Figure 4- C, in U.S.Geological Survey Professional Paper 222. 1950. #1:/California-Professional paper 222/wwp00238 ID. Woodring, W.P. 238 Monterey shale in Casmalia Hills: Contorted chert in middle member of Monterey shale on coast near Lions Head. Santa Barbara County, California. Circa 1939. Figure 4-D, in U.S.Geological Survey Professional Paper 222. 1952 #1:/California-Professional paper 222/wwp00239 ID. Woodring, W.P. 239 Lospe formation and Monterey shale in Casmalia Hills: Photomicrograph; tuff from Lospe formation. The shards are light colored somewhat cloudy. The clear rectangular grain is plagioclase; ordinary light 30 x. Santa Barbara County, California. Circa 1939. Figure 3-A, in U.S.Geological Survey Professional Paper 222. 1950. #1:/California-Professional paper 222/wwp00241 ID. Woodring, W.P. 241 Foraminifera from Sisquoc formation and Foxen mudstone. California. Plate 23, in U.S.Geological Survey Professional Paper 222. 1950. #1:/Washington-Professional paper 202/pcf00066 ID. Park, C.F. 66 Muscovite garnet facies of the Kaniksu batholith; light gray is feldspar and quartz. Dark gray booklets are muscovite, and tiny dark spots are garnets, from center of sec. 1, T. 36 N., R. 42 E. Pend Oreille County, Washington. 1936. Plate 12-B, U.S.Geological Survey Professional Paper 202. 1943. #1:/California-Professional paper 222/wwp00242 ID. Woodring, W.P. 242 Foraminifera from upper member of Monterey shale and Sisquoc formation. California. Plate 22, in U.S.Geological Survey Professional Paper 222. 1950. #1:/Colorado-Professional paper 223/lts0005a ID. Lovering, T.S. 5a Aerial view looking north along the foothills from an altitude of 7,100 feet half a mile south of Morrison, shows the common topographic expression of the post Mississippian sedimentary formations and some of the younger erosion surfaces. Colorado. Circa 1932. Figure 6 with sketch, in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts0015a ID. Lovering, T.S. 15a Aerial view looking northwest towards Devils Head from over Colorado Springs at an altitude of 12,300 feet; show topographic contrast between crystalline rocks of the Colorado Front Range and the sedimentary rocks of the bordering plains. Note the broad bench like compound erosion surface in front of higher central part of the range. Colorado. Circa 1932. Figure 1, in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts0020a ID. Lovering, T.S. 20a Aerial view looking north at Cheyenne Mountain from an altitude of 10,000 feet above Lytle, Cheyenne Mountain, type locality of the Cheyenne Mountain erosion surface, is a mass of Pre-Cambrian rock that has been thrust eastward onto Cretaceous strata at the south end of the Ute Pass fault. The fault line is marked by the abrupt termination of the foothills. El Paso County, Colorado. Circa 1932. Figure 16, with sketch, in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00042 ID. Lovering, T.S. 42 Klippe of Pre-Cambrian granite resting on Cretaceous shale, 5 miles north of Kremmling, the crystalline rocks are marked by wooded slopes and stand in contrast to the sage cover shale beneath. This is a part of the Williams Range underthrust. Grand County, Colorado. Circa 1926. Figure 11-C in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00060 ID. Lovering, T.S. 60 Main vein of Wellington mine on 3d level of Oro shaft, Breckenridge district, massive sphalerite cut by seams of late white ankerite partly replaces the shale wall on the left side of picture. Summit County, Colorado. Circa 1926. Figure 23-D, in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts0060a ID. Lovering, T.S. 60a Aerial view looking northeast across Berthoud Pass, from an altitude of 16, 200 feet, the position of the Berthoud Pass fault, which is responsible for the heavy ground in the Moffat tunnel 6 miles to the north is shown. Two cirques of Wisconsin age, which are cut into the Flattop peneplain at an altitude of slightly more than 12,000 feet, appear in the foreground and middle distance. Grand County, Colorado. Circa 1932. Figure 15, with sketch, in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts0091a ID. Lovering, T.S. 91a Aerial view looking south-southwest across Allens Park from an altitude of 14,800 feet about 5 miles east of Longs Peak. The rugged topography characteristic of the Continental Divide is shown in the background and the transition from the high glaciated country near the middle of the range to the bench like erosion surfaces that border it is shown in the foreground. This transition zone almost coincides with the lower limit of glaciation. Colorado. Circa 1932. Figure 3 with sketch, in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts0094a ID. Lovering, T.S. 94a Aerial view looking southwest across Overland Mountain toward James Peak from an altitude of 9,300 feet near Jamestown; shows type locality of the Overland Mountain erosion surface and the transition belt were it merges with the higher erosion surfaces near the crest of the range. The dumps in the left middle ground are those of the John Jay mine. Colorado. Circa 1932. Figure 2 with sketch, in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts0099a ID. Lovering, T.S. 99a Aerial view looking north-northwest from an altitude of 8,700 feet over a point 2 miles southeast of Boulder, most of the erosion surfaces recognized in the Front Range are well represented. The Flattop surface shows on the crest of Bald Mountain four miles east of the crest of the range; the Green Ridge surface bevels Boulder County Hill in the extreme left background; the Overland Mountain surface is widely developed in the middle distance on a level with the top of Sugarloaf; the Bergen Park surface is represented by a somewhat dissected bench just in front of Sugarloaf; the type locality of the Flagstaff Hill berm is conspicuous at the mountain front; the dissected Mount Morrision berm shows in the low hills directly behind Boulder; and the Pleistocene high terraces are prominent in the left foreground. Parts of several of the mining districts in the northeastern part of the mineral belt are visible, including Magnolia, Sugarloaf, Ward, Gold Hill, Poorman Hill, and Sunshine. Colorado. Circa 1932. Figure 4 with sketch, in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223-Professional paper 245/lts00395 ID. Lovering, T.S. 395 Characteristic appearance of productive part of an average size tungsten vein, looking directly up at Cold Spring vein in roof of stope on 1930 ore shoot 100 feet level 4, west of Old shaft. sg, Sericitized granite; qg, silicified and sericitized fragments of granite; f, intergrown ferberite and horn quartz. Boulder County, Colorado. Pre-1950. Figure 23-C, in U.S.Geological Survey Professional Paper 223. 1950. Figure 52, in U.S.Geological Survey Professional Paper 245. 1953. #1:/Colorado-Professional paper 223/lts00450 ID. Lovering, T.S. 450 Typical coarse grained Pikes Peak granite on the summit of Bison Peak [Bison Mountain]. The rapid weathering of the granite along joints is shown in this view. This weathering gives rise to residual and balanced boulders characteristic of the areas where the Pikes Peak granite has been long exposed to mechanical and chemical weathering. Mans figure near base of upper cliff at right gives the scale. Park County, Colorado. Pre- 1950. Figure 9-D in U.S.Geological Survey Professional Paper 223. 1950 #1:/Colorado-Professional paper 223/lts00459 ID. Lovering, T.S. 459 Pikes Peak granite on the northeastern slope of Bison Peak [Bison Mountain] about 12 miles southeast of Kenosha Pass. The primary gneissic structure developed in the coarse grained Pikes Peak granite near the edge of the batholith shows well in this photograph. Park County, Colorado. Pre-1950. Figure 9-C in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00682 ID. Lovering, T.S. 682 Ditch like trough caused by a strong fault zone crossing the crest of Keystone Mountain at the east side of sec. 31, T. 5 S., R. 76 W. This is the common topographic expression of strong unsilicified fault zones formed during the Laramide revolution in the Pre- Cambrian terrain. Summit County, Colorado. Pre-1950. Figure 18, in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00685 ID. Lovering, T.S. 685 Typical exposure of relatively unfolded Idaho Springs formation 3.5 miles south of Idaho Springs on road to Echo Lake. Clear Creek County, Colorado. Pre- 1950. Figure 7-A in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00686 ID. Lovering, T.S. 686 Photomicrograph of quartz-biotite schist from Idaho Springs formation at Nederland, original bedding (nearly vertical in photograph) is intersected by shear planes sloping down to right at about 45 degrees and shears are cut by later shears sloping to left at 60 degrees. b, biotite; g garnet; m magnetite; q quartz; fgb, crushed feldspar, quartz and biotite. Plain light. Boulder County, Colorado. Pre- 1950. Figure 7-C in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00687 ID. Lovering, T.S. 687 Photomicrograph of quartz-biotite schist from Idaho Springs formation at Nederland, original bedding (nearly vertical in photograph) is intersected by shear planes sloping down to right at about 45 degrees and shears are cut by later shears sloping to left at 60 degrees. b, biotite; g garnet; m magnetite; q quartz; fgb, crushed feldspar, quartz and biotite. Polarized light. Boulder County, Colorado. Pre- 1950. Figure 7-D in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00688 ID. Lovering, T.S. 688 Typical Swandyke hornblende gneiss shows strike and dip of the foliation and pitch of the linear structure in the plane of foliation. The handle of the hammer indicates the linear structure pitching to the right about 60 degrees: Headwaters of the North Fork of Swan River 2 miles southwest of Montezuma. Summit County, Colorado. Pre- 1950. Figure 8-A in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00689 ID. Lovering, T.S. 689 Swandyke hornblende gneiss cut by a dike of pegmatite, Floyd Hill 3.5 miles east of Idaho Springs. Clear Creek County, Colorado. Pre- 1950. Figure 8-B in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00690 ID. Lovering, T.S. 690 Quartz monzonite gneiss; the wavy light and dark bands of pegmatite and biotite-rich gneiss are characteristic of this rock. On Beaver Brook, 5.5 miles southeast of Idaho Springs. Clear Creek County, Colorado. Pre- 1950. Figure 8-C in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00691 ID. Lovering, T.S. 691 Boulder Creek granite half a mile north of North Boulder Creek on the Ward-Nederland road, the coarse grain and slightly gneissic texture characteristic of this dark gray granite are easily discernible. A "ghost" of schist lies about a foot below the 6-inch scale, and a dike of pegmatite cuts the granite about 2 feet above the scale. Boulder County, Colorado. Pre- 1950. Figure 8-D in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00692 ID. Lovering, T.S. 692 Granite gneiss (gneissic aplite) in the Idaho Springs formation, seven-tenths of mile north of Nederland, the seam of gneissic aplite which represents the granite gneiss formation underlies the scale and is bordered by a thin seam of pegmatite. The dark colored strongly foliated schist with which the gneiss is interlayered is its common constituent. Boulder County, Colorado. Pre- 1950. Figure 9-A in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00693 ID. Lovering, T.S. 693 Gneissic hornblende diorite half a mile north of Nederland, near the center of a mass about 100 feet wide. The coarse grained and slightly foliated structure of this outcrop is characteristic of the formation. Boulder County, Colorado. Pre- 1950. Figure 9-B in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00694 ID. Lovering, T.S. 694 Photomicrograph of granite gneiss (gneissic aplite) from a dike in Boulder Creek granite near Cold Spring mine, Nederland. Primary gneiss structure as shown by elongation of biotite is nearly horizontal in picture. Slight secondary granulation is indicated by incipient mortar structure developed at edge of microcline crystals (ms) b, biotite; m microcline-perthite; q quartz. Polarized light. Boulder County, Colorado. Pre-1950. Figure 10-A in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00695 ID. Lovering, T.S. 695 Photomicrograph of gneissic hornblende diorite half a mile northwest of Nederland, Primary gneissic structure near horizontal in photograph; p Plagioclase (andesine); a augite; h hornblende. Plain light. Boulder County, Colorado. Pre-1950. Figure 10-B in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00696 ID. Lovering, T.S. 696 Photomicrograph of Boulder Creek granite from ridge half a mile east of junction of Middle Boulder and North Boulder Creek, primary gneissic structure indicated by quartz- oligoclase contact and by biotite is nearly horizontal in photograph; slight secondary shearing shown by undulatory extinction of quartz in upper right; b biotite; o oligoclase; q quartz. Polarized light. Boulder County, Colorado. Pre-1950. Figure 10-C in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00697 ID. Lovering, T.S. 697 Photomicrograph of "white porphyry" of group 1 (figure 12) from Leadville corroded phenocrysts of quartz in fine-grained sericitized groundmass of orthoclase, quartz and plagioclase (oligoclase) Lake County, Colorado. Pre-1950. Figure 10-D in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00698 ID. Lovering, T.S. 698 Photomicrograph of diabase from dike on Hager Mountain northwest of Loveland Pass, representative of the diabase dike rocks of group 2 (figure 12); a Augite; i iron ore ilmenite; p plagioclase (labradorite). Polarized light. Grand County, Colorado. Pre-1950. Figure 10-E in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00699 ID. Lovering, T.S. 699 Photomicrograph of porphyritic hornblende diorite of group 4 (figure 12) from Swan River 2 miles south Tiger, showing reaction series. Core of augite (a) bordered by hornblende (h) which in turn is completely rimmed by biotite (b). Cross nicols. Summit County, Colorado. Pre-1950. Figure 10-F in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00700 ID. Lovering, T.S. 700 Silver Plume granite in a dike cutting the Boulder Creek granite in Gordon Gulch, 3 miles northeast of Nederland. The parallel arrangement of the feldspar crystals characteristic of this formation is well shown. Boulder County, Colorado. Pre-1950. Figure 11-A in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00701 ID. Lovering, T.S. 701 Basal Fountain formation in Red Rock Park, north of Morrison, the weathering of the soft shale layers interbedded with the arkosic grit of the formation and its freedom from joints illustrate well in this exposure the slope to the left is Pre-Cambrian rock from which the Pennsylvanian has been stripped by erosion. Jefferson County, Colorado. Pre-1950. Figure 11-B in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00702 ID. Lovering, T.S. 702 Boulder Mountain, looking northwest, showing usual topographic expression of the steep northwesterly echelon faults in the foothills region. Cf, Fountain formation; pC, pre- Cambrian granite. Boulder Colorado. Pre-1950. Figure 11-D, with graphics, in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00703 ID. Lovering, T.S. 703 Photomicrograph of porphyritic granodiorite typical of rocks of group 4 from stock half a mile south of Jamestown, the primary alinement of feldspar responsible for the platy structure of the intrusive is clearly shown; i Ilmenite; h, hornblende; p, plagioclase (andesine); q quartz; t, titanite. Crossed nicols. Boulder County, Colorado. Pre-1950. Figure 13-A, in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00704 ID. Lovering, T.S. 704 Photomicrograph of porphyritic quartz monzonite from center of large stock 2 miles northeast of Montezuma, typical of Lincoln porphyry group 6, note fresh appearance of plagioclase and deuteric alteration of orthoclase. b biotite; o, sericitized orthoclase; p, plagioclase (andesine); q, quartz. Crossed nicols. Summit County, Colorado. Pre-1950. Figure 13-B, in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00705 ID. Lovering, T.S. 705 Photomicrograph of rhyolite porphyry of group 7 from dike 1 mile north of Argentine Pass, the phenocrysts have borders of fine grained oriented quartz in the groundmass. o, sericitized orthoclase; q, quartz. Crossed nicols. Clear Creek County, Colorado. Pre- 1950. Figure 13-C, in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00706 ID. Lovering, T.S. 706 Photomicrograph of sodic granite porphyry of group 8 from dike three-eighths of mile south of Jamestown; Fresh plagioclase and deuterically altered zone orthoclase in micro granular groundmass of quartz and orthoclase. p, plagioclase (albite-oligoclase); o, orthoclase. Crossed nicols. Boulder County, Colorado. Pre-1950. Figure 13-D, in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00707 ID. Lovering, T.S. 707 Photomicrograph of bostonite of group 9 from dike, 750 feet north of reservoir, Central City; Phenocryst of orthoclase in groundmass of anorthoclase blades, which show marked flow structure. a, anorthoclase, o, orthoclase; h, hole in slide. Plain light. Gilpin County, Colorado. Pre-1950. Figure 13-E, in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00708 ID. Lovering, T.S. 708 Photomicrograph of biotite latite porphyry of group 10 from dike in the Stanley mine west of Idaho Springs. Note fragmentation of plagioclase and abundance of biotite. Groundmass of partly glass. p, Plagioclase (andesine-oligoclase); o, orthoclase; b biotite. Plain light. Clear Creek County, Colorado. Pre-1950. Figure 13-F, in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00709 ID. Lovering, T.S. 709 Photomicrograph of intrusion breccia of group 11 (figure 12) from Logan mine 5 miles west of Boulder. Highly fragmented granite and some porphyry and early vein material lie in a biotite-flecked glassy groundmass that is partly silicified and sericitized. b, Fragmented biotite latite; g, glassy groundmass. Crossed nicols. Boulder County, Colorado. Pre-1950. Figure 17-A, in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00710 ID. Lovering, T.S. 710 Photomicrograph of limburgite of group 12 (figure 12) from dike near Sugarloaf post office, corroded serpentinized olivine phenocrysts in mosaic of small augite crystals lying in a glassy groundmass. a, Augite; o, olivine; s, serpentine. Crossed nicols. Boulder County, Colorado. Pre-1950. Figure 17-B, in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00711 ID. Lovering, T.S. 711 Photomicrograph of Pre-Cambrian replacement ore from Malachite mine. Pyrrhotite (p) and sphalerite (s) replaced amphibole (a). Jefferson County, Colorado. Pre-1950. Figure 17-C, in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00712 ID. Lovering, T.S. 712 Photomicrograph of Pre-Cambrian ore from nickel mine a mile west of Gold Hill. Amphibole (a) and early pyrite (py) replaced by Pyrrhotite (pr) chalcopyrite(c) and nicolite(n); area in included in figure 17-E shown in rectangle. Boulder County, Colorado. Pre-1950. Figure 17-D, in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00713 ID. Lovering, T.S. 713 Photomicrograph of ore from nickel mine, a mile west of Gold Hill, showing part of area included in figure 17-D. Pyrite (py) and Pyrrhotite (pr) replaced by chalcopyrite (c). Niccolite (n) replaces Pyrrhotite, which replaces amphibole (a). Boulder County, Colorado. Pre-1950. Figure 17-E, in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00714 ID. Lovering, T.S. 714 Photomicrograph of Pre-Cambrian replacement ore from nickel mine, a mile west of Gold Hill. Schistose amphibole is replaced by Pyrrhotite (pr), which imperfectly preserves the metamorphic structure. Later replacement veinlets of niccolite (n), pentlandite (p) and chalcopyrite (c) are well shown; minute borders of niccolite cause the fuzzy outline of the pentlandite veinlets in the Pyrrhotite. Boulder County, Colorado. Pre-1950. Figure 17-F, in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00715 ID. Lovering, T.S. 715 Differential erosion of the Hoosier breccia reef near the head of Black Tiger Gulch, 6 miles west of Boulder, the country rock of this silicified northwest fault zone is Boulder Creek granite. Wall-like outcrops of this kind have give rise to the local use of the term "dikes" in naming these faults. Boulder County, Colorado. Pre-1950. Figure 19, in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00716 ID. Lovering, T.S. 716 Looking east at the Maxwell breccia reef near the junction of Fourmile Creek and North Boulder Creek. At this exposure the reef consists of brecciated Boulder Creek granite, moderately silicified and stained with hematite. The breccia reef has been mapped previously as pegmatite dike cutting the granite. Boulder County, Colorado. Pre-1950. Figure 20-A, in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00717 ID. Lovering, T.S. 717 Part of the reef shown in photo 716; showing the polished and grooved face of the Maxwell breccia reef, the direction of the grooves (g) is indicated by the arrow. The large scale chatter mark (c) or "pressed in" structure shows the west wall (toward the viewer) has moved down with respect to the one pictured. Boulder County, Colorado. Pre-1950. Figure 20-B, in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00718 ID. Lovering, T.S. 718 Unmineralized part of tungsten vein 200 feet west of large ore shoot, 100-foot level of Tungsten Vein mine. Note interior faulting and drag in barren sheeted zone (sz), showing the hanging wall (hw) has dropped. Boulder County, Colorado. Pre-1950. Figure 22, in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00719 ID. Lovering, T.S. 719 Coarse vuggy quartz (white) cut by intergrowth hematite and fine-grained quartz (black), from Rogers breccia reef west of Peewink Mountain. Boulder County, Colorado. Pre- 1950. Figure 23-A, in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00720 ID. Lovering, T.S. 720 Characteristic appearance of the horn quartz in a barren part of tungsten vein. Looking directly up Cold Spring vein in the roof of the 5th level, 600 feet east of New shaft. fg, fresh granite; ag, argillized granite, sg, sericitized granite; vn, vein; q, horn quartz; and a, ankerite. Boulder County, Colorado. Pre-1950. Figure 23-B, in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00721 ID. Lovering, T.S. 721 Photomicrograph of oxidized lead-silver ore from 1st level of Detroit-Hicks mine, Breckenridge district. Galena (g) is replaced by argentite (a) which in turn is replaced by native silver (s). The galena alters to anglesite (an), most of which has been converted to cerussite (c). Summit County, Colorado. Pre-1950. Figure 60-A in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00722 ID. Lovering, T.S. 722 Photomicrograph of copper-lead-zinc ore from Stevens mine Argentine district. Chalcopyrite (cp) replaces sphalerite (s) and both are replaced by galena (g). q, Quartz. Clear Creek County, Colorado. Pre-1950. Figure 60-B, in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00723 ID. Lovering, T.S. 723 Specimen typical of better grade ore from Alice mine. Original monzonite porphyry completely converted to coarse grained sercicite (s) and cut by open interlacing fractures partly filled with clear quartz on which rests clumps of pyrite (p) chalcopyrite. Supergene sooty chalcocite (c) incrusts the chalcopyrite and assays high in gold. q, Quartz. Clear Creek County, Colorado. Pre-1950. Figure 60-C, in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00724 ID. Lovering, T.S. 724 Photomicrograph showing part of area in figure 60-E: Ore and fragments of sericitized schist in fine-grained vuggy quartz; opal (ov); b, barite; cq, chalcedonic quartz, g, gold; p, petzite; s, sylvanite. Crossed nicols and oblique illumination combined. Clear Creek County, Colorado. Pre- 1950. Figure 60-D in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00725 ID. Lovering, T.S. 725 Photomicrograph of high grade gold-telluride ore from Jewelry Shop mine, Idaho Springs. Note vugs lined with opal (ov). b, Barite; cq, chalcedonic quartz, g, gold; p, petzite; s, sylvanite. Transmitted light. Clear Creek County, Colorado. Pre- 1950. Figure 60-E in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00726 ID. Lovering, T.S. 726 Ore from Shaffer vein, Freeland mine, McClelland tunnel level, 35 feet east of Shaffer raise, 1,325 feet below surface; Ankerite (a) and pyrite (p) broken and cemented by dark fine-grained quartz (q); sphalerite (s) seamed by tetrahedrite (t) which is closely associated with dark quartz (q). Clear Creek County, Colorado. Pre- 1950. Figure 60-F in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00727 ID. Lovering, T.S. 727 Photomicrograph of high grade silver ore from Caribou vein 100 feet below surface. Native silver (s) replaces argentite (a) in zone of secondary sulfides. Boulder County, Colorado. Pre- 1950. Figure 68-A in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00728 ID. Lovering, T.S. 728 Typical coarse-grained quartz-pyrite-sphalerite ore of the Ward district from 200-foot level of Queen mine. Bands of pyrite (p) and quartz (q) are earlier that the sphalerite(s). Area included in figure 68-C shown by small rectangle. Boulder County, Colorado. Pre- 1950. Figure 68-B in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00729 ID. Lovering, T.S. 729 Photomicrograph of part of field shown photo 728, enlarged to show centrifugal replacement of pyrite (p) by sphalerite (s); chalcopyrite (c) replaces sphalerite in small irregular veinlets. q, Quartz. Boulder County, Colorado. Pre- 1950. Figure 68-C in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00730 ID. Lovering, T.S. 730 Ore from Queen mine, Ward district, showing wolframite (light gray) and quartz (dark gray) cutting coarse pyrite (white). Boulder County, Colorado. Pre- 1950. Figure 68-D in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00731 ID. Lovering, T.S. 731 Photomicrograph of low-grade ferberite ore from Quaker City mine. Horn quartz and fine-grained ferberite (f) were deposited in bottoms of open spaces in a breccia and coated successively by limonite-stained horn quartz (q) and clay mineral beidellite (b). Colorado. Pre- 1950. Figure 68-E in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00732 ID. Lovering, T.S. 732 Looking east at barren part of the main Clyde vein at the east end of the stope on the tunnel level. Boulder County, Colorado. Pre- 1950. Figure 68-F in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00733 ID. Lovering, T.S. 733 Photomicrograph of gold-tungsten ore from west end of 280-foot level of Keklonga mine, Magnolia district. Sylvanite (s) in crustified quartz associated with early coarse-grained ferberite. Fine-grained ferberite with a little quartz lies on the earlier quartz and is in turn incrusted and veined by late quartz containing some ferberite of three generations. py, Pyrite. Boulder County, Colorado. Pre- 1950. Figure 74-A in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00734 ID. Lovering, T.S. 734 Photomicrograph of gold-tungsten ore from Keklonga mine, Magnolia district. Sylvanite (s) in vuggy quartz, which contains a little pyrite (py); quartz and ferberite, cut in early quartz. Boulder County, Colorado. Pre- 1950. Figure 74-B in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00735 ID. Lovering, T.S. 735 Photomicrograph of high-grade gold ore from shaft ore shoot, 1,100-foot level, Slide mine; showing native gold (g) associated with roscoelite (r) and quartz (q). Boulder County, Colorado. Pre- 1950. Figure 74-C in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00736 ID. Lovering, T.S. 736 Photomicrograph of telluride ore from shaft ore shoot, 900-foot level, Slide mine. Altaite (a) is later than petzite (p), which is contemporaneous with hessite (h). Veinlets of sylvanite(s) cut both petzite and hessite. Black area is horn quartz. Boulder County, Colorado. Pre- 1950. Figure 74-D in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00737 ID. Lovering, T.S. 737 Seam of high-grade telluride ore bordering main vein in fine-grained pyrite and horn quartz, 800-foot level near shaft, Ingram mine. The blades of telluride (t) although chiefly sylvanite are in part intergrown with petzite and lie in a milky-colored horn quartz (q). pq, Fine-graded pyrite and horn quartz. Boulder County, Colorado. Pre- 1950. Figure 74-E in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00738 ID. Lovering, T.S. 738 High-grade gold-telluride ore from Smuggler mine. Light colored blades and blebs are chiefly mixtures of petzite and altaite, with minor amounts of native gold and sylvanite. Pyrite is sparingly disseminated in the quartz. Boulder County, Colorado. Pre- 1950. Figure 74-F in U.S.Geological Survey Professional Paper 223. 1950. #1:/Colorado-Professional paper 223/lts00739 ID. Lovering, T.S. 739 Hypothermal ore from Snowy Range mine, Lake Albion district. The vein (vn) comprises diopsidic aegirite (d) galena (g) asbestos (a) and quartz (q) with minor amounts of sphalerite (s). The wall roc is little-altered syenite porphyry (sy) containing disseminated chalcopyrite (c) and pyrite (p) near the vein. Boulder County, Colorado. Pre-1950. Figure 86 in U.S.Geological Survey Professional Paper 223. 1950. #1:/Utah-Professional paper 226/ajc00034 ID. Anderson, J.C. 34 Sevier fault at the mouth of Red Canyon, Wasatch formation overlain by Sevier River (?) formation and basalt on upthrown block (right), basalt overlies Sevier River (?) and Pleistocene beds on downthrown block (left). Garfield County, Utah. 1936. Figure 32 in U.S. Geological Survey. Professional paper 226. 1951. #1:/Utah-Professional paper 226/rgb00242 ID. Richardson, G.B. 242 Bald Knoll, source of lava flow in Johnson Valley. Kane County, Utah. 1909. Figure 34 in U.S. Geological Survey. Professional paper 226. 1951. #1:/Georgia-Professional paper 224/ktl00001 ID. Kesler, T.L. 1 Photomicrograph of fine-grained quartzite of the Weisner formation: with plain light, showing a little Detrital zircon (z) and orthoclase (o). Bartow County, Georgia. Circa 1944. Plate 2-A, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00002 ID. Kesler, T.L. 2 Photomicrograph of fine-grained quartzite of the Weisner formation: with crossed nicols, showing interlocking texture of the quartz. Bartow County, Georgia. Circa 1944. Plate 2-B, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00003 ID. Kesler, T.L. 3 Photomicrograph of metaconglomerate of the Weisner formation: with plain light, showing sharp outlines of pebbles. Bartow County, Georgia. Circa 1944. Plate 2-C, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00004 ID. Kesler, T.L. 4 Photomicrograph of metaconglomerate of the Weisner formation: with crossed nicols, showing typical interlocking texture of quartzite (above) and composite mineral character of some of the pebbles. Bartow County, Georgia. Circa 1944. Plate 2-D, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00005 ID. Kesler, T.L. 5 Thirty-six inch calyx-drill core of metasiltstone and metashale from the Weisner formation at Allatoona dam site. Note white bodies of orthoclase and quartz where bedding is distorted. Bartow County, Georgia. Circa 1944. Plate 3-A, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00006 ID. Kesler, T.L. 6 Quartzite of the Weisner formation containing quartz rods: longitudinal view. Bartow County, Georgia. Circa 1944. Plate 3-B, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00007 ID. Kesler, T.L. 7 Quartzite of the Weisner formation containing quartz rods: polished face of transverse section; part of the quartzite is bleached from weathering. Bartow County, Georgia. Circa 1944. Plate 3-C, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00008 ID. Kesler, T.L. 8 Diagrams illustrating possible origin by alternate movements along s planes. Georgia. Circa 1944. Plate 3-D, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00009 ID. Kesler, T.L. 9 Dolomite of the Rome formation containing thin beds of metashale that are resistant to weathering; exposure in the Paga No. 1 mine. Bartow County, Georgia. Circa 1944. Plate 4-A, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00010 ID. Kesler, T.L. 10 Exposure of metasiltstone, of the Conasauga formation, at Aubrey Dam. Bartow County, Georgia. Circa 1944. Plate 4-B, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00011 ID. Kesler, T.L. 11 Photomicrograph of metasiltstone from vicinity of Aubrey Dam: with plain light, showing abundance of dolomite-the mineral with various degrees of high relief-and scarcity of muscovite-the lamellar material. Bartow County, Georgia. Circa 1944. Plate 4-C, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00012 ID. Kesler, T.L. 12 Photomicrograph of metasiltstone from vicinity of Aubrey Dam: with crossed nicols, showing interlocking relation of quartz and feldspar; note twinning in some feldspar grains. Bartow County, Georgia. Circa 1944. Plate 4-D, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00013 ID. Kesler, T.L. 13 Photomicrograph of unweathered oligoclase-mica gneiss from dump at Allatoona gold mine: with plain light showing oligoclase grains clouded with inclusions. Oligoclase, quartz, and orthoclase fill the lighter parts of the field. Other minerals ate intercrystallized micas m; calcite c; apatite a. Bartow County, Georgia. Circa 1944. Plate 6-A, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00014 ID. Kesler, T.L. 14 Photomicrograph of unweathered oligoclase-mica gneiss from dump at Allatoona gold mine: with crossed nicols, showing lack of strain and fracture, and sporadic twinning in oligoclase. Bartow County, Georgia. Circa 1944. Plate 6-B, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00015 ID. Kesler, T.L. 15 Photomicrograph of oligoclase-mica gneiss with strongest foliation and maximum proportion of orthoclase: Mottled granular minerals are orthoclase and a little oligoclase; clear granular mineral with strain shadows is quartz; dense light-gray layers are muscovite laminae. Crossed nicols. Bartow County, Georgia. Circa 1944. Plate 6-C, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00016 ID. Kesler, T.L. 16 Photomicrograph of andesine-augite gneiss, showing texture of the rock and association of minerals; the andesine shows strong twinning. Other minerals are augite, a, marginally altered to uralite; biotite, b; orthoclase, o; black areas are ilmenite. Crossed nicols. Bartow County, Georgia. Circa 1944. Plate 6-D, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00017 ID. Kesler, T.L. 17 Polished face of andesine-augite gneiss. Bartow County, Georgia. Circa 1944. Plate 7-A, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00018 ID. Kesler, T.L. 18 Layered structure in andesine-augite gneiss. Bartow County, Georgia. Circa 1944. Plate 7-B, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00019 ID. Kesler, T.L. 19 Strongly foliated porphyroblastic gneiss of common occurrence. Outcrop 1 mile east of mouth of Stamp Creek. Bartow County, Georgia. Circa 1944. Plate 7-C, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00020 ID. Kesler, T.L. 20 Local, weakly foliated variety of porphyroblastic gneiss, on Etowah River 0.2 miles above the south of Stamp Creek; foliation parallel to pocketknife. Bartow County, Georgia. Circa 1944. Plate 7-D, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00021 ID. Kesler, T.L. 21 Local, fluted variety of porphyroblastic gneiss from mouth of Stamp Creek polished face parallel to axis of fluting. Bartow County, Georgia. Circa 1944. Plate 8-A, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00022 ID. Kesler, T.L. 22 Local, fluted variety of porphyroblastic gneiss from mouth of Stamp Creek polished face transverse to axis of fluting. Bartow County, Georgia. Circa 1944. Plate 8-B, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00023 ID. Kesler, T.L. 23 Inclusion of garnetiferous metasediment in garnetiferous porphyroblastic gneiss. Note gradational rather than sharp contacts near the hammer. Bartow County, Georgia. Circa 1944. Plate 8-C, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00024 ID. Kesler, T.L. 24 Photomicrograph showing andesine myrmekite marginal to orthoclase in porphyroblastic gneiss: Orthoclase, o; non-myrmekitic andesine, a; most the finer-grained material is quartz. Crossed nicols. Bartow County, Georgia. Circa 1944. Plate 8-D, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00025 ID. Kesler, T.L. 25 Open-cut made in mining manganese from weathered fault zone at Dobbins mine. Quartzite and metashale of the Weisner formation in left wall strike obliquely against manganiferous clay in bottom and right wall, that is residual from dolomite of the Rome formation. Bartow County, Georgia. Circa 1944. Plate 9-A, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00026 ID. Kesler, T.L. 26 Fault relation of white quartzite of the Weisner formation and dark baritic residuum of dolomite of the Rome formation in Section House mine. Bartow County, Georgia. Circa 1944. Plate 9-B, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00027 ID. Kesler, T.L. 27 Zone of placations ruptured to form fracture cleavage in unusually thin-layered amphibolite. The layers of the amphibolite dip away from the observer, the pitch of the placations is parallel to the dip, and the fracture cleavage is approximately vertical. Bartow County, Georgia. Circa 1944. Plate 9-C, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00028 ID. Kesler, T.L. 28 Layered porphyroblastic gneiss containing orthoclase crystals oriented diversely. Nonporphyroblastic layer, with gradational contact, is at bottom. Vein of bluish quartz, similar to that in groundmass, cuts porphyroblastic and nonporphyroblastic layers. Bartow County, Georgia. Circa 1944. Plate 9-D, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00029 ID. Kesler, T.L. 29 Photomicrograph of fine-grained metasiltstone from 1 mile southwest of Aubrey Lake: with plain light, showing wedge-shaped and irregular veinlets of orthoclase (white) and laminae of metashale (dark). Bartow County, Georgia. Circa 1944. Plate 10-A, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00030 ID. Kesler, T.L. 30 Photomicrograph of fine-grained metasiltstone from 1 mile southwest of Aubrey Lake: with crossed nicols, showing veinlet outlined in photo 29 enlarged. Note comblike structure of the orthoclase; quartz, in minor amount, has the same structure. Bartow County, Georgia. Circa 1944. Plate 10-B, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00031 ID. Kesler, T.L. 31 Photomicrograph of fluted porphyroblastic gneiss shown photographs 21 and 22: with plain light, showing alternation of mica laminae and aggregates of the granular minerals. Note intricate veining of orthoclase (light gray) by quartz (white). Bartow County, Georgia. Circa 1944. Plate 10-C, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00032 ID. Kesler, T.L. 32 Photomicrograph of fluted porphyroblastic gneiss shown photographs 21 and 22: with crossed nicols, showing most strongly fractured orthoclase (large crystals) and severely strained quartz (at top), fine-grained material with orthoclase in largely quartz. Bartow County, Georgia. Circa 1944. Plate 10-D, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00033 ID. Kesler, T.L. 33 Crystals of orthoclase deposited in metashale of the Rome formation, 1.2 miles west of the Kelly mine. Bartow County, Georgia. Circa 1944. Plate 11-A, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00034 ID. Kesler, T.L. 34 Metashale of the Weisner formation: containing porphyroblastic crystals of orthoclase, from crest of Hanging Mountain. Bartow County, Georgia. Circa 1944. Plate 11-B, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00035 ID. Kesler, T.L. 35 Metashale of the Weisner formation: containing orthoclase in pod like crystals and aggregates, from outcrop 1.6 miles west of Stamp Creek Church. Bartow County, Georgia. Circa 1944. Plate 11-C, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00036 ID. Kesler, T.L. 36 Vein (below) and pods (above) of orthoclase deposited in shear zone in metashale of the Weisner formation. Bartow County, Georgia. Circa 1944. Plate 12-A, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00037 ID. Kesler, T.L. 37 Veins (near hammer and below to right) of orthoclase, quartz and calcite cutting dolomite of the Rome formation, exposed in Paga No. 1 mine. Bartow County, Georgia. Circa 1944. Plate 12-B, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00038 ID. Kesler, T.L. 38 Photomicrograph of vein rock shown in photo 37, with plain light, showing orthoclase, or, fractured and veined by quartz q. Bartow County, Georgia. Circa 1944. Plate 12-C, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00039 ID. Kesler, T.L. 39 Photomicrograph of vein rock shown in photo 37, with crossed nicols, showing strain twinning in orthoclase and strain shadows in quartz. Bartow County, Georgia. Circa 1944. Plate 12-D, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00040 ID. Kesler, T.L. 40 Metasiltstone of the Conasauga formation containing orthoclase porphyroblasts. Bartow County, Georgia. Circa 1944. Plate 13-A, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00041 ID. Kesler, T.L. 41 Brecciated barite, enclosed in massive jasperoid in fault zone at Paga No.1 mine. Bartow County, Georgia. Circa 1944. Plate 13-B, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00042 ID. Kesler, T.L. 42 Photomicrograph showing dolomite of the Rome formation (dark granular areas) partly replaced by fine-grained quartz (white) containing a little coarse carbonate (gray), black cube is unweathered pyrite; with plain light. Bartow County, Georgia. Circa 1944. Plate 13-C, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00043 ID. Kesler, T.L. 43 Photomicrograph of jasperoid from the Dobbins mine, showing well preserved carbonate cleavage and texture; with plain light. Bartow County, Georgia. Circa 1944. Plate 13-D, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00044 ID. Kesler, T.L. 44 Pyritic breccia from residuum of dolomite of the Rome formation at Sugar Hill brown- ore mine; Matrix is pyrite partly altered to limonite; fragments consist of jasperoid (left side) and vein quartz (right side). Bartow County, Georgia. Circa 1944. Plate 14-A, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00045 ID. Kesler, T.L. 45 Knob of massive, fine-grained pyrite in place in the Black Bank brown-ore mine. Bartow County, Georgia. Circa 1944. Plate 14-B, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00046 ID. Kesler, T.L. 46 Lenticular body of barite in dolomite of the Rome formation, exposed by barite mining 900 feet northwest of Paga No. 2 mine. Bartow County, Georgia. Circa 1944. Plate 14- C, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00047 ID. Kesler, T.L. 47 Residual mass of barite, 4 feet across, recovered from residuum of dolomite of the Rome formation at the Tucker Hollow mine. Bartow County, Georgia. Circa 1944. Plate 14-D, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00048 ID. Kesler, T.L. 48 Tabular barite crystals coated with fine-grained supergene quartz. Bartow County, Georgia. Circa 1944. Plate 14-E, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00049 ID. Kesler, T.L. 49 Quartz coatings left after the removal of barite by weathering. Bartow County, Georgia. Circa 1944. Plate 14-F, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00050 ID. Kesler, T.L. 50 Photomicrograph of barite, br, enclosing galena, g; sphalerite, s; pyrite, p; and chalcopyrite, cp; specimen from the Tucker Hollow mine. Bartow County, Georgia. Circa 1944. Plate 15-A, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00051 ID. Kesler, T.L. 51 Photomicrograph of chalcopyrite, cp, partly weathered to limonite, li, enclosing unaltered enargite, e. Bartow County, Georgia. Circa 1944. Plate 15-B, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00052 ID. Kesler, T.L. 52 Photomicrograph of ore minerals in jasperoid from the Aubrey mine; tennantite, t and luzonite, lz, enclosed in supergene chalcocite c, which is etched. Bartow County, Georgia. Circa 1944. Plate 15-C, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Georgia-Professional paper 224/ktl00053 ID. Kesler, T.L. 53 Photomicrograph of ore minerals in jasperoid from the Aubrey mine; Chalcocite, etched, c, replacing tennantite, t. Bartow County, Georgia. Circa 1944. Plate 15-D, in U.S.Geological Survey Professional Paper 224. 1950. #1:/Colorado-Professional paper 227/hljb0001 ID. Hanley, J.B. 1 Devils hole beryl pegmatite; fracture zone in muscovite-albite-quartz pegmatite, northeast side of main open-cut, at an altitude of 8,043 feet. Fremont County, Colorado. 1943. Plate 8 in U.S. Geological Survey. Professional paper 227. 1950. #1:/Colorado-Professional paper 227/hljb0002 ID. Hanley, J.B. 2 Hyatt pegmatite, prior to mining. Larimer County, Colorado. 1950. Plate 14-A in U.S. Geological Survey. Professional paper 227. 1950. #1:/Colorado-Professional paper 227/hljb0003 ID. Hanley, J.B. 3 Hyatt pegmatite, after mining from the same location as photo 2. Larimer County, Colorado. 1950. Plate 14-B in U.S. Geological Survey. Professional paper 227. 1950. #1:/Idaho-Professional paper 229/stoll007 ID. Stoll, W.C. 7 Mining in the main open pit of the Muscovite mine. Latah County, Idaho. Circa 1943. Plate 8-A in U.S. Geological Survey. Professional paper 229. 1950. #1:/Idaho-Professional paper 229/stoll008 ID. Stoll, W.C. 8 Specimens of sheet mica. Latah County, Idaho. Circa 1943. Plate 8-B in U.S. Geological Survey. Professional paper 229. 1950 #1:/Montana-Professional paper 231/pjt00746 ID. Pardee, J.T. 746 Glaciolacustrine silt near the National Bison Range east of Moiese, Lake County, Montana. September 10,1921. Figure 33, in U.S.Geological Survey Professional Paper 231. 1953. #1:/Arizona-Professional paper 233/hjw00001 ID. Huddle, J.W. 1 A composite of these photographs: View of the Devonian and Mississippian rocks exposed in the north wall of the Salt River canyon at the Prochow mines; the gray cliffs on the sky line are Redwall limestone, of Mississippian age, and the slopes below these cliffs are formed by the Martin formation, of Devonian age, which rests unconformably on the pre-Devonian diabase exposed in the canyon and in the foreground. Gila County, Arizona. February 8, 1944. Figure 12, in U.S. Geological Survey. Professional paper 233. 1952. #1:/Arizona-Professional paper 233/hjw00004 ID. Huddle, J.W. 4 Lower member of the Martin formation as exposed in a road cut on US. Highway 60 north of the Salt River; the brown beds are in the lower third of the cut. The upper two- thirds of the cut shows the thin-bedded gray dolomitic limestones and shale partings of the light buff weathering beds. Gila County, Arizona. February 15, 1944. Figure 13, in U.S. Geological Survey. Professional paper 233. 1952. #1:/Arizona-Professional paper 233/hjw00005 ID. Huddle, J.W. 5 Contact between the Martin formation and the Redwall limestone in the Flying "V" Canyon; the Redwall limestone forms the overhanging ledge at the top of the exposure, and the upper member of the Martin formation is shown in the middle and foreground. There is no obvious unconformity between the Redwall limestone and the green shaly beds of the Martin formation. Gila County, Arizona. March 1, 1944. Figure 19, with graphics, in U.S. Geological Survey. Professional paper 233. 1952. #1:/Arizona-Professional paper 233/hjw00006 ID. Huddle, J.W. 6 Contact between the Redwall limestone of Mississippian age, and the basal member of the Naco formation, of Pennsylvania age in road cut on US Highway 60, north of the Salt River. The contact shows no sign of faulting and is interpreted as one side of a filled sinkhole. Gila County, Arizona. March 4, 1944. Figure 20, with graphics, in U.S. Geological Survey. Professional paper 233. 1952. #1:/Arizona-Professional paper 233/hjw00007 ID. Huddle, J.W. 7 Rubble breccia in the massive member of the Redwall limestone exposed in a road cut on US Highway 60. The limestone blocks are separated by red sandy mudstone. Gila County, Arizona. February 2, 1944. Figure 23, in U.S. Geological Survey. Professional paper 233. 1952. #1:/Arizona-Professional paper 233/hjw00008 ID. Huddle, J.W. 8 Chert breccia in the base of the Naco formation exposed north of the Salt River; the stadia rod is 15 feet long. Gila County, Arizona. March 11, 1944. Figure 24, in U.S. Geological Survey. Professional paper 233. 1952. #1:/Alaska-Professional paper 233/kir00001 ID. Kirk, E. 1 Atrypella, lissatrypa, nucleospira, alaskospira, howellella and delthyris. Alaska. Plate 7 in U.S. Geological Survey. Professional paper 233. 1952. #1:/Alaska-Professional paper 233/kir00002 ID. Kirk, E. 2 Camarotoechia, atrypa, atrypella and carchidium-conchidium Alaska. Plate 8 in U.S. Geological Survey. Professional paper 233. 1952. #1:/Alaska-Professional paper 233/kir00003 ID. Kirk, E. 3 Conchidium alaskene. Alaska. Plate 9 in U.S. Geological Survey. Professional paper 233. 1952. #1:/Alaska-Professional paper 233/kir00004 ID. Kirk, E. 4 Conchidium, cramarotoechia, eospirifer, howellaella and cymostrophia. Alaska. Plate 10 in U.S. Geological Survey. Professional paper 233. 1952. #1:/North Carolina-Professional paper 234/sfm00014 ID. Swain, F.M. 14 Cytherellidae, cyridae, bairddiidae, cytheridae. North Carolina. Plate 1, in U.S.Geological Survey Professional Paper 234. 1952. #1:/North Carolina-Professional paper 234/sfm00015 ID. Swain, F.M. 15 Cytheridae. North Carolina. Plate 2, in U.S.Geological Survey Professional Paper 234. 1952. #1:/North Carolina-Professional paper 234/sfm00016 ID. Swain, F.M. 16 Cytheridae. North Carolina. Plate 3, in U.S.Geological Survey Professional Paper 234. 1952. #1:/North Carolina-Professional paper 234/sfm00017 ID. Swain, F.M. 17 Cytheridae. North Carolina. Plate 4, in U.S.Geological Survey Professional Paper 234. 1952. #1:/North Carolina-Professional paper 234/sfm00018 ID. Swain, F.M. 18 Cytheridae. North Carolina. Plate 5, in U.S.Geological Survey Professional Paper 234. 1952. #1:/North Carolina-Professional paper 234/sfm00019 ID. Swain, F.M. 19 Cytheridae. North Carolina. Plate 6, in U.S.Geological Survey Professional Paper 234. 1952. #1:/North Carolina-Professional paper 234/sfm00020 ID. Swain, F.M. 20 Cytheridae. North Carolina. Plate 7, in U.S.Geological Survey Professional Paper 234. 1952. #1:/North Carolina-Professional paper 234/sfm00021 ID. Swain, F.M. 21 Cytherellidae, cypridae, bairdhidae and cytheridae. Plate 8, in U.S.Geological Survey Professional Paper 234. 1952. #1:/North Carolina-Professional paper 234/sfm00022 ID. Swain, F.M. 22 Cytheridae. North Carolina. Plate 7, in U.S.Geological Survey Professional Paper 234. 1952 #1:/Utah-Professional paper 228/cdon0014 ID. Carroll, Don 14 View of hogback ridge: The Mancos shale northeast along the Caineville Reef. Emery sandstone member; Blue Gate shale member; Ferron sandstone member; Tununk shale, members of the Mancos shale. Photo by George Grant, Department of the Interior. Wayne County, Utah. Circa 1937. Very similar to figure 20-A, in U.S.Geological Survey Professional Paper 228. 1953. #1:/:Utah-Professional paper 228/hcb0341a ID. Hunt, C.B. 341a Boulder Canyon, an example of the narrow gorges several hundred feet deep in the Reef of the San Rafael Swell, the Capitol Reef, and Waterpocket Fold. Emery County, Utah. 1935. Figure 96, a sketch, in U.S.Geological Survey Professional Paper 228. 1953 #1:/:Utah-Professional paper 228/hcb0341b ID. Hunt, C.B. 341b Boulder Canyon, an example of the narrow gorges several hundred feet deep in the Reef of the San Rafael Swell, the Capitol Reef, and Waterpocket Fold. Emery County, Utah. 1935. Figure 96, a sketch, in U.S.Geological Survey Professional Paper 228. 1953 #1:/Utah-Professional paper 228/hcb00343 ID. Hunt, C.B. 343 Looking west along the Reef of the San Rafael Swell, from the north end of Little Wild Horse Mesa. Emery County, Utah. 1935. Figure 95-B, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00354 ID. Hunt, C.B. 354 Views along the southeast flank of the San Rafael Swell: Thin beds of Carmel formation resting on massive Navajo sandstone along the canyon of the Muddy River where it emerges from the San Rafael Swell. Emery County, Utah. 1935. Figure 12-D, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb0358a ID. Hunt, C.B. 358a Form panoramic view of hogback ridge: Entrada sandstone at the Reef of the San Rafael Swell, view east about 1 mile east of the Muddy River. Emery County, Utah. 1935. Figure 20-B, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00360 ID. Hunt, C.B. 360 Views along the southeast flank of the San Rafael Swell: West along the unconformity between the Morrison formation and the underlying Summerville formation. Gypsiferous conglomerate at the base of the Morrison formation fills channel eroded 50 ft. into the evenly bedded Summerville formation. Emery County, Utah. 1935. Figure 12-C, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00370 ID. Hunt, C.B. 370 Views along the southeast flank of the San Rafael Swell: Clay beds in the upper part of the Morrison formation form badlands. View east across the Muddy River a mile below the Reef of the San Rafael Swell; Geological Survey pack train in the valley. Emery County, Utah. 1935. Figure 12-B, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00376 ID. Hunt, C.B. 376 Views along the southeast flank of the San Rafael Swell: a typical exposure of Shinarump conglomerate (thick capping ledge) on Moenkopi formation a mile east of Boulder Canyon. Emery County, Utah. 1935. Figure 12-A, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00392 ID. Hunt, C.B. 392 Views in the badlands and mesa areas: Badlands formed by clay beds in the upper part of the Morrison formation, near the Muddy River. Wayne County, Utah. 1935. Figure 98- B, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00410 ID. Hunt, C.B. 410 Views in the badlands and mesa areas: Badlands in the upper part of the Ferron sandstone member of the Mancos shale, along state route 24, the highest badland hills are formed by the Blue Gate shale member of the Mancos shale. In the distance is Factory Butte. Wayne County, Utah. 1935. Figure 98-C, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00429 ID. Hunt, C.B. 429 Dike on the East Spur, Mount Holmes. The part shown is about 12 feet high; a rock fragment in the medial joint plane settles a little lower with each freeze and thaw. Garfield County, Utah. April 1936. Figure 102, a sketch, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00465 ID. Hunt, C.B. 465 Gravel covered pediments at the foot of Mount Ellen [Peak]: Form a panoramic view northeast across the dissected north edge of the Birch Creek Benches. The gravel is 6 to 10 feet thick and lies on a pediment eroded in Tununk shale member of the Mancos shale. Garfield County, Utah. July 1936. Figure 103-A, in U.S.Geological Survey Professional Paper 228. 1953. #L2:Utah-Professional paper 228/hcb00466 ID. Hunt, C.B. 466 Gravel covered pediments at the foot of Mount Ellen [Peak]: Form a panoramic view northeast across the dissected north edge of the Birch Creek Benches. The gravel is 6 to 10 feet thick and lies on a pediment eroded in Tununk shale member of the Mancos shale. Garfield County, Utah. July 1936. Figure 103-A, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00490 ID. Hunt, C.B. 490 Views in the badlands and mesa areas: Form a panorama north of Stephens Mesa, the badlands are developed in the Blue Gate shale member of the Mancos shale. Wayne County, Utah. September 1936. Figure 98-A, in U.S.Geological Survey Professional Paper 228. 1953. #1:/:Utah-Professional paper 228/hcb00491 ID. Hunt, C.B. 491 Views in the badlands and mesa areas: Form a panorama north of Stephens Mesa, the badlands are developed in the Blue Gate shale member of the Mancos shale. Wayne County, Utah. September 1936. Figure 98-A, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00493 ID. Hunt, C.B. 493 Gravel covered pediments at the foot of Mount Ellen [Peak]: form a panorama looking south across the Dugout Creek benches; sandstone hills protrude through the gravel, which is about 25 feet thick. Wayne County, Utah. 1936. Figure 103-B, in U.S.Geological Survey Professional Paper 228. 1953. #L2:Utah-Professional paper 228/hcb00494 ID. Hunt, C.B. 494 Gravel covered pediments at the foot of Mount Ellen [Peak]: form a panorama looking south across the Dugout Creek benches; sandstone hills protrude through the gravel, which is about 25 feet thick. Wayne County, Utah. 1936. Figure 103-B, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00529 ID. Hunt, C.B. 529 Small alcove arch in Wingate sandstone, south wall of North Wash; 1 mile below Hog Canyon. Garfield County, Utah. September 1936. Figure 88, as a sketch, in U.S.Geological Survey Professional Paper 228. 1953. #L:Utah-Professional paper 228/hcb00554 ID. Hunt, C.B. 554 Views on Mount Ellen [Peak]: Lawler-Ekker placer mine on the gravel below Eagle City. Garfield County, Utah. May 1937. Figure 42-C, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00562 ID. Hunt, C.B. 562 Views on Mount Ellen [Peak]: along the south side of the Ragged Mountain bysmalith showing sandstone beds of the Morrison formation dragged up steeply against the side of the intrusion but flat a short distance away from it (right). Garfield County, Utah. May 1937. Figure 42-B, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00566 ID. Hunt, C.B. 566 Views on Mount Ellen Peak: The floor of the South Creek laccolith at the west end of South Creek Ridge. The porphyry rests on carbonaceous shale and sandstone in the upper part of the Ferron sandstone member of the Mancos shale. Garfield County, Utah. May 1937. Figure 25-C, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00604 ID. Hunt, C.B. 604 Steele Butte. The Mesaverde formation caps the butte; the Masuk member of the Mancos shale forms the slope. Garfield County, Utah. July 1937. Figure 18-C, in U.S.Geological Survey Professional Paper 228. 1953. Utah-Professional paper 228/hcb00625 #1:/Utah-Professional paper 228/hcb00625 ID. Hunt, C.B. 625 Views on Mount Ellen [Peak]: Ragged Mountain, looking across the Canyon of Slate Creek. Nearly horizontal beds of sandstone appear to pass under the mountain but they are turned vertically at the contact with porphyry forming the upper half and core of the mountain, the intrusion is a bysmalith. Garfield County, Utah. July 1937. Figure 42-A, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00645 ID. Hunt, C.B. 645 One of the thick sills in the Cretaceous formation on the southwest flank of Mount Pennell, view is northwest in Wild Cow Canyon. Garfield County, Utah. August 1937. Figure 44, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00705 ID. Hunt, C.B. 705 Views in the desert east of Mount Ellen [Peak]: East down the gravel pediment along Seep Wash. The pediments and the gravel on them extend eastward into the heads of the canyons, and the canyon producing formations rise eastward a thousand feet higher than the lower edge of the pediments. Garfield County, Utah. September 1937. Figure 91-A, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00707 ID. Hunt, C.B. 707 Views in the desert east of Mount Ellen [Peak]: Typical view of the Morrison- Summerville escarpment, 2 miles south of North Wash. Je Entrada sandstone; Js Summerville formation; Jm Morrison formation. A gravel-free pediment in the Entrada slopes from the foot of the escarpment. Garfield County, Utah. September 1937. Figure 91-B, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00717 ID. Hunt, C.B. 717 Views in the desert east of Mount Ellen [Peak]: Small gravel-free pediments in Entrada sandstone at the foot of sandstone monoliths 1.5 miles north of North Wash. Garfield County, Utah. September 1936. Figure 91-C, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00722 ID. Hunt, C.B. 722 Views on Mount Ellen Peak: the floor of the laccolith at the west end of Horseshoe Ridge. The porphyry rests on carbonaceous shale and sandstone belonging to the Ferron. H.D. Miser apparently marking the contact. Garfield County, Utah. September 1936. Figure 25-C, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00733 ID. Hunt, C.B. 733 Views on Mount Ellen Peak: along the east side of North Summit Ridge to peak of Mount Ellen. The seemingly smooth surface of the peak is mantled with frost-heaved boulders like those in the foreground. Photo by H.D. Miser. Garfield County, Utah. September 1936. Figure 25-B, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00742 ID. Hunt, C.B. 742 Steep discordant contact at the south side of Cedar Creek laccolith, porphyry at the right, Entrada sandstone (left) is dragged up steeply and crushed against the contact. Photo by H. D. Miser. Wayne County, Utah. 1936. Figure 41-B, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00783 ID. Hunt, C.B. 783 Steep discordant contact on north side of Bull Mountain bysmalith, porphyry at the right, the geologist is standing on and pointing to the contact. Uppermost beds of the Morrison formation are dragged up nearly vertically at the side of the bysmalith. Photo by H. D. Miser. Garfield County, Utah. 1938. Figure 41-A, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00785 ID. Hunt, C.B. 785 Steep discordant contact on the east side of Bull Mountain bysmalith, porphyry at right, the ledge is nearly horizontal rock at lower left is sandstone of the Morrison formation. This bed is turned up vertically along the contact with the porphyry. Photo by H. D. Miser. Garfield County, Utah. September 1938. Figure 41-C, in U.S.Geological Survey Professional Paper 228. 1953 #1:/Utah-Professional paper 228/hcb00801 ID. Hunt, C.B. 801 Views on Mount Ellen Peak: southeast across the head of Bromide basin. The rim of the basin approximately marks the boundary between the shatter zone and the Mount Ellen stock, which is in the basin. Photo by H.D. Miser. Garfield County, Utah. September 1938. Figure 25-A, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00822 ID. Hunt, C.B. 822 Northward across Penellen Pass, The Horn is one of the laccoliths injected northward from Mount Pennell. Photo by H.D. Miser. Garfield County, Utah. September 1938. Figure 44, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00840 ID. Hunt, C.B. 840 Views of stream channels and alluvium north of Mount Ellen [Peak]: up the Fremont River where it is joined by the Muddy River, the channel of the Fremont River is a quarter of a mile wide and 6 ft. lower than the 1896 channel. Wayne County, Utah. 1939. Figure 114-B, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00841 ID. Hunt, C.B. 841 Views of stream channels and alluvium north of Mount Ellen [Peak]: This was the channel of the Fremont River prior to 1896. The channel, 65 feet wide and 5 ft. deep here, is part of a cut-off meander preserved in the alluvial plain where the Fremont joins the Muddy River (S ½ sec.3, T. 28 S., R. 11 E.) Wayne County, Utah. 1939. Figure 114- A, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00842 ID. Hunt, C.B. 842 Views of stream channels and alluvium north of Mount Ellen [Peak]: McClellan Wash has its channel 55 ft. lower than Nazer Creek. At this locality the divide between the two creeks is only 5.5 feet higher than Nazer Creek and when the divide is breached, that creek, which is transporting gravel from Mount Ellen, will aggrade McClellan Wash. Wayne County, Utah. 1939. Figure 114-C, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00843 ID. Hunt, C.B. 843 Canyon views: Northwest across the Colorado River just below Dandy Crossing; Indian ruins in right foreground. San Juan County, Utah. 1939. Figure 9-B, with graphics, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00844 ID. Hunt, C.B. 844 Canyon views: down Glen Canyon from mouth of Smith Fork. The gravel terrace is California Bar. Navajo sandstone; Kayenta formation; Wingate sandstone; Triassic formations; Cutler formation (White Rim sandstone member and top of Organ Rock tongue). Garfield County, Utah. 1939. Figure 9-C, with graphics, , in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00845 ID. Hunt, C.B. 845 Canyon views: West across the Colorado River at the mouth of Sevenmile Canyon. Scale indicated by boat in midstream near center of picture. Garfield County, Utah. 1939. Figure 8-A, with graphics, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00846 ID. Hunt, C.B. 846 Canyon views: Angel Cove, an alcove arch near the mouth of Beaver Wash. Scale indicated by pack horse at the foot of the alcove; Kayenta formations; Wingate formation; Chinle formation; Moenkopi formation; White Rim sandstone member and Por, Organ Rock tongue of the Cutler formation. Photo by R.L. Miller. Wayne County, Utah. 1939. Figure 8-D, with graphic, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00847 ID. Hunt, C.B. 847 Canyon views: Permian formations on the west side of the Dirty Devil River, a quarter mile below Hatch Canyon. The boulder-capped pinnacles are on an old landslide. Photo by R.L. Miller. Garfield County, Utah. 1939. Figure 8-C, with graphics, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00848 ID. Hunt, C.B. 848 Canyon views: Up Dirty Devil River from the mouth of Hatch Canyon. Two small alcove arches can be seen in the Wingate sandstone. Photo by R.L Miller. Garfield County, Utah. 1939. Figure 8-B, with graphics, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00849 ID. Hunt, C.B. 849 Cliffs along Bullfrog Creek near the mouth of Clay Canyon. Morrison formation; Summerville formation: Entrada sandstone. Photo by R.L. Miller. Garfield County, Utah. 1939. Figure 18-B, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00850 ID. Hunt, C.B. 850 Views of stream channels and alluvium north of Mount Ellen [Peak]: Contact between two alluvial deposits in Sweetwater Creek below the mouth of Cedar Creek. The younger alluvium forms the low bench (right) and long the marked contact overlaps the base of the older alluvium (left). Wayne County, Utah. 1939. Figure 114-D, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00851 ID. Hunt, C.B. 851 Thin section of monzonite porphyry from sill by Deer Creek south of Pine Spring, Mount Pennell; the large dark phenocrysts are hornblende. The remains of a basal section of aegirine-augite can be seen in the left center. The upper part of the section is fine-grained hornblendic inclusion. X 6. Garfield County, Utah. 1939. Figure 82-A, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00852 ID. Hunt, C.B. 852 Thin section of diorite porphyry from Bulldog Ridge: Feldspar phenocrysts have been replaced by fine grain feldspar along transverse fissures, embayed quartz crystal in lower right. X 35. Garfield County, Utah. 1939. Figure 82-A, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00853 ID. Hunt, C.B. 853 Polished specimen showing contact where monzonite porphyry (right) has been intruded into diorite porphyry: specimen is from the contact of two minor intrusions three-quarters of mile south of Pine Spring. Garfield County, Utah. 1939. Figure 82-C, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00854 ID. Hunt, C.B. 854 Polished specimen of diorite porphyry from roof contact on the Pistol Ridge laccolith, the edge of scale (i.e. about 1/8 inch above middle bottom) marks the contact. The phenocrysts are crushed, rotated, and dragged linearly in a zone about 1 inch wide at the contact. Two inches from the contact the porphyry has the same texture and structure as i the center of the laccolith. Garfield County, Utah. 1939. Figure 82-D, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00855 ID. Hunt, C.B. 855 Thin section of monzonite porphyry from Bulldog Ridge: flow lines commonly are more distinct in the monzonite porphyry than in the diorite porphyry. Aegirine-augite in the upper left corner; in the lower right is an inclusion of hornblende and feldspar that also contains aegirine-augite. The feldspar alteration is similar to that in the diorite porphyry. X 6. Garfield County, Utah. 1939. Figure 80-D, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00856 ID. Hunt, C.B. 856 Thin section of diorite porphyry, from sill beneath the Copper Ridge laccolith; the lower part of the section is a hornblendic inclusion containing the same plagioclase and hornblende as the diorite porphyry. X 6. Garfield County, Utah. 1939. Figure 80-C, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00857 ID. Hunt, C.B. 857 Thin section of diorite porphyry from north edge of Black Mesa, Mount Hillers: fine- grained feldspar and sercicite has replaced parts of the feldspar phenocrysts, in part along composition zones, in part along transverse fissures, and in part in the irregular areas. X 12.5. Garfield County, Utah. 1939. Figure 80-A, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00858 ID. Hunt, C.B. 858 Thin section of diorite porphyry from the Mount Pennell stock on the ridge next north of Corral Ridge. Fine-grained feldspar has replace parts of the feldspar phenocrysts. The vein is albite. The dark minerals are mostly hornblende; some small ones are magnetite. X 12.5. Garfield County, Utah. 1939. Figure 80-B, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00859 ID. Hunt, C.B. 859 Polished specimen of a hornblendic inclusion in diorite porphyry; specimen from peak of Mount Ellen [Peak], both the gneissic texture and veins in the inclusions are truncated by the enclosing porphyry. Garfield County, Utah. 1939. Figure 79-A, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00860 ID. Hunt, C.B. 860 Polished specimen of mixed sedimentary and igneous material from the shatter zone by the Mount Ellen stock on the west of Barton Peak. Garfield County, Utah. 1939. Figure 79-B, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00881 ID. Hunt, C.B. 881 Brigham Butte, a monolith of Entrada sandstone in the dunal area along Well Wash, 6 miles north of Hanksville. Small pediments around the base of such monoliths are common. The original (photo) was compared with a photograph taken 40 years ago but no additional pitting, fluting or other erosion of the monolith could be discerned. Wayne County, Utah. 1939. Figure 92, as a sketch, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Utah-Professional paper 228/hcb00886 ID. Hunt, C.B. 886 Pleasant Creek at Notom: The former small channel of the creek is still preserved locally on the old flood plain and substantiates the reports that it could be bridged with poles. The arroyo now is about 20 ft. deep. Wayne County, Utah. 1939. Figure 113, a sketch, in U.S.Geological Survey Professional Paper 228. 1953. #1:/Colorado-Professional paper 235/bch00005 ID. Behre, C.H. 5 Typical moraine and high terraces, Empire Gulch; view westward from vicinity of Hatch Ranch; note flat-topped terraces in middle distance. Lake County, Colorado. 1929. Figure 6, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00013 ID. Behre, C.H. 13 Typical exposure of Manitou dolomite; note absences of color banding, but presence of crosscutting "sheeted" structure and of faint ribbed markings showing bedding. Lake County, Colorado. 1929. Figure 14, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00014 ID. Behre, C.H. 14 Characteristic appearance of Dyer dolomite member (lower "Blue" limestone) of Chaffee formation: note blocky fracture and contrast in color shading between successive beds. Lake County, Colorado. 1929. Figure 19, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00015 ID. Behre, C.H. 15 Coarsely porphyry Pike Peak (?) granite cut by aplite facies of Silver Plume granite and enclosing schist fragments. Lake County, Colorado. 1929. Figure 7, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00016 ID. Behre, C.H. 16 Finely granular Silver Plume (?) granite with inclusions; note fracturing of inclusions but lack of corrosion. Lake County, Colorado. 1929. Figure 9, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00017 ID. Behre, C.H. 17 Silver Plume (?) granite; note finely crystalline texture and faintly trachitoid arrangement of crystals with banding parallel to long dimension of specimen; length of specimen 3 inches. Lake County, Colorado. 1929. Figure 10, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00018 ID. Behre, C.H. 18 Pikes Peak (?) granite; note coarsely crystalline texture and conspicuous dark mineral; length of specimen, 3 inches long. Lake County, Colorado. 1929. Figure 8, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00019 ID. Behre, C.H. 19 Parting quartzite member of Chaffee formation, showing typical honeycombing on weathering; note suggestions of irregular bedding; length of specimen, 4 inches. Lake County, Colorado. 1929. Figure 17, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00020 ID. Behre, C.H. 20 Diffusion banding of limonite, commonly seen in grits of the Weber (?) formation: note also ellipsoidal parting. Lake County, Colorado. 1929. Figure 24, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00021 ID. Behre, C.H. 21 Section showing Pre-Cambrian and Paleozoic rocks; length of the face shown is 1,800 feet; exposure on western wall, Dyer Amphitheater. Lake County, Colorado. 1929. Figure 12, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00022 ID. Behre, C.H. 22 Limestone breccia at base of the Leadville dolomite; fragments are from beds in the Leadville and Dyer strata. Lake County, Colorado. 1929. Figure 20, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00023 ID. Behre, C.H. 23 Typically banded white quartzite of Cambrian age. Lake County, Colorado. 1929. Figure 13, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00024 ID. Behre, C.H. 24 Early stage: blue-gray limestone or dolomite is somewhat fractured, cracks being filled with white dolomite; specimen is 3 inches long. Lake County, Colorado. 1929. Figure 21, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00025 ID. Behre, C.H. 25 Intermediate stage: limestone is about 50 percent replaced by dolomite. Lake County, Colorado. 1929. Figure 22, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00026 ID. Behre, C.H. 26 Advanced stage: limestone almost wholly replaced and dark blotches also no longer conspicuous; specimen is 3 inches in length. Lake County, Colorado. 1929. Figure 23, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00028 ID. Behre, C.H. 28 South Dyer Mountain from West Sheridan Mountain; note complex structural relations of intrusive bodies (white in photograph) cutting Pre-Cambrian granite. Lake County, Colorado. 1929. Figure 31, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00029 ID. Behre, C.H. 29 Agglomerate facies on Iowa Gulch porphyry, exposed along road on north slope, Long and Derry Hill; note platy parting. Lake County, Colorado. 1929. Figure 46, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00030 ID. Behre, C.H. 30 Typical early White porphyry; note characteristic platy parting: Mount Sheridan. Lake County, Colorado. 1929. Figure 25, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00031 ID. Behre, C.H. 31 Typical later white porphyry; phenocrysts are more common in this specimen than usual, length 3 inches. Lake County, Colorado. 1935. Figure 32, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00032 ID. Behre, C.H. 32 Early White porphyry, slightly altered; dark spots are bluish quartz areas, length 3.5 inches. Lake County, Colorado. 1929. Figure 26, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00033 ID. Behre, C.H. 33 White porphyry, altered with mottling; quartz areas enlarged; darker, vaguely outlined areas are light buff to brown; length 3.5 inches. Lake County, Colorado. 1935. Figure 29, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00034 ID. Behre, C.H. 34 White porphyry, with vug formation; vugs bear small crystals of quartz and sercicite; length of specimen 3 inches. Lake County, Colorado. 1935. Figure 30, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00035 ID. Behre, C.H. 35 Evans Gulch porphyry showing relatively finely crystalline, equigranular texture: length of specimen 4 inches. Lake County, Colorado. 1935. Figure 34, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00036 ID. Behre, C.H. 36 Lincoln porphyry showing orthoclase and quartz phenocrysts: length of specimen 3.5 inches. Lake County, Colorado. 1935. Figure 34, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00037 ID. Behre, C.H. 37 Sacramento porphyry; note more coarsely crystalline texture and darker color: length of specimen 4 inches. Lake County, Colorado. 1935. Figure 36, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00038 ID. Behre, C.H. 38 Iowa Gulch porphyry, finely crystalline facies; dark spots are chiefly dendrites of manganese dioxide: length of specimen 3 inches. Lake County, Colorado. 1935. Figure 37, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00039 ID. Behre, C.H. 39 Little Union quartz latite, showing inclusions: length of specimen 4.5 inches. Lake County, Colorado. 1935. Figure 38, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00040 ID. Behre, C.H. 40 Iowa Gulch porphyry, showing flow banding in dense stony phase: length of specimen 4.5 inches. Lake County, Colorado. 1935. Figure 39, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00041 ID. Behre, C.H. 41 Johnson Gulch porphyry; note euhedral phenocrysts resembling those of Lincoln porphyry: length of specimen 3.5 inches. Lake County, Colorado. 1935. Figure 40, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00042 ID. Behre, C.H. 42 Sills on Mount Evans, from Evans Amphitheater; sediments included are shales and sandstones of the Weber (?) formation; Explanation (of graphics); Cw, Weber (?), Pz Paleozoic sediments, Tew, early White porphyry; Ts, Sacramento porphyry. Lake County, Colorado. 1929. Figure 42, with graphics, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00043 ID. Behre, C.H. 43 Floor and walls of southern head, Evans Amphitheater; rock glacier in left middle distance; laccolithic sill of Dyer Mountain in background; note later white porphyry dike in saddle and Sacramento porphyry in Dyer Mountain; early White porphyry; Cambrian; Manitou dolomite; Peerless shale; Dyer dolomite; Leadville dolomite; Weber (?) sandstone. Lake County, Colorado. 1929. Figure 75, with graphics, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00044 ID. Behre, C.H. 44 Down upon West Dyer Mountain from Dyer Mountain: Leadville dolomite; Dyer dolomite member of Chaffee formation; Parting quartzite member of Chaffee formation; Manitou dolomite; shale of Peerless formation and Cambrian quartzite; early White porphyry. Lake County, Colorado. 1929. Figure 16, with graphics, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00047 ID. Behre, C.H. 47 Trace of mineralized Mosquito fault near the south head of Evans Amphitheater, looking southwest. Barren Weber (?) formation and Tertiary porphyry exposed on Little Ellen Hill over the potentially productive Leadville dolomite, which passes beneath the valley to the right. Rocks exposed on slopes of West Dyer Mountain include the Leadville dolomite, early Paleozoic formations and pre-Cambrian rocks. Lake County, Colorado. 1929. Figure 79, with graphics, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00051 ID. Behre, C.H. 51 Trace of mineralized Liddia fault system near head of Iowa Amphitheater, showing offset of the potentially productive Leadville dolomite. A thick sill of White porphyry can be seen near the head of the amphitheater. The Liddia mine (slightly below middle at left) and the Continental Chief mine (near dead center) are both located in the Leadville dolomite. Lake County, Colorado. 1929. Figure 54, with graphics, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00053 ID. Behre, C.H. 53 Southwestern slope of Mount Sherman adjacent to branches of South Dyer fault to left (north) of northern branch of fault; Cambrian, Irregularly intruded by sills of White porphyry; thick White porphyry sill; Manitou dolomite; and Devonian and Mississippian rocks. Lake County, Colorado. 1929. Figure 52, with graphics, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00061 ID. Behre, C.H. 61 Typical Johnson Gulch porphyry showing characteristic corrosion of large quartz phenocryst by feldspathic groundmass. Lake County, Colorado. 1929. Figure 43, with graphics, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00062 ID. Behre, C.H. 62 Sacramento porphyry. Main phenocrysts are altered andesine-oligoclase; also present are hornblende and biotite. X 40; plain transmitted light. Board of Trade Amphitheater. Lake County, Colorado. 1935. Figure 44, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00063 ID. Behre, C.H. 63 Rhyolite agglomerate. Shows flow lines in light-brown glass and finely crystallized quartz, surrounding fragments of coarse quartz and altered feldspar crystals. X 33; plain transmitted light; from "dike" in prospect south of Helena mine, Iowa Gulch. Lake County, Colorado. 1935. Figure 49, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00064 ID. Behre, C.H. 64 Oxidized ore consisting of galena (polished white) and limestone black crossed by veinlets of gray smithsonite. X-1/2. Continental Chief mine. Lake County, Colorado. 1935. Figure 65, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00065 ID. Behre, C.H. 65 Breccia of White porphyry cemented and partly replaced by pyrite. X-1/2; dump of Julia- Fisk shaft. Lake County, Colorado. 1935. Figure 69, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00066 ID. Behre, C.H. 66 Oxidized manganosiderite (dark) in bladed crystals encrusting earlier carbonate (white). X-1/2. Dump, First National shaft. Lake County, Colorado. 1935. Figure 72, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00067 ID. Behre, C.H. 67 Early White porphyry almost unaltered. Shows part of one oligoclase phenocryst and the finely granular quartz groundmass, partly invaded by carbonates: X 33; Crossed nicols; from sill on Dyer Mountain, west of Liddia fault. Lake County, Colorado. 1935. Figure 27, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00068 ID. Behre, C.H. 68 Alteration (silicification) typical of early White porphyry; note extensive development of coarse secondary grainlets of quartz, with inclusions and absence of true phenocrysts. X 33; crossed nicols; from Great Eastern shaft, near Lake Isabelle. Lake County, Colorado. 1935. Figure 28, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00069 ID. Behre, C.H. 69 Later white porphyry. The fine-grained groundmass bears one phenocryst of kaolinized feldspar. X 33; crossed nicols. Dike on East Ball Mountain. Lake County, Colorado. 1935. Figure 33, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00070 ID. Behre, C.H. 70 Lincoln porphyry. The edge of one of the typical large orthoclase phenocrysts is visible in this section. Note section of altered oligoclase-albite, and shreds of bleached biotite. X 40; crossed nicols. East slope of Little Ellen Hill. Lake County, Colorado. 1935. Figure 41, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00071 ID. Behre, C.H. 71 Evans Gulch porphyry, kaolinized and chloritized; the relatively equigranular texture, the numerous cloudy feldspar phenocrysts and the numerous hornblende laths (not shown) and mica plates are typical. X 40: transmitted light. sill on northeast slope, Little Ellen Hill. Lake County, Colorado. 1935. Figure 45, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00072 ID. Behre, C.H. 72 Iowa Gulch porphyry, granular phase: phenocrysts are oligoclase, highly altered. Note small feldspar laths and cloudy groundmass. X 40; crossed nicols. Iowa Gulch near Lillian mine. Lake County, Colorado. 1935. Figure 47, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00073 ID. Behre, C.H. 73 Little Union quartz latite; note flow structure and fragment of minerals (chiefly quartz, feldspar and biotite). X 33; plain transmitted light. Head of Little Union gulch. Lake County, Colorado. 1935. Figure 48, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00074 ID. Behre, C.H. 74 Partly oxidized galena in silicified limestone; X-1/2: Prospect X-71 Horseshoe Mountain. Surface is polished, White, galena; light-gray margins of galena, anglesite Lake County, Colorado. 1935. Figure 64, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00075 ID. Behre, C.H. 75 Sphalerite (black) crossed by stringers of smithsonite (white) X-1/2. Deepest workings of Continental Chief mine. Lake County, Colorado. 1935. Figure 66, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00076 ID. Behre, C.H. 76 A typical baritic ore, Canterbury tunnel, X-1/2. Lake County, Colorado. 1935. Figure 67, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00077 ID. Behre, C.H. 77 Veinlet of rhodochrosite crossing from shattered granite to margin of sulfide ore. X-1/2. Hellena vein, east face, 5th level, Hellena mine. Lake County, Colorado. 1935. Figure 68, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00078 ID. Behre, C.H. 78 Baritic ore, showing a meshwork of barite blades (white) encrusted with galena (black) and smithsonite (light gray). X-1/2. Continental Chief mine. Lake County, Colorado. 1935. Figure 70, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00079 ID. Behre, C.H. 79 Barite blades disseminated in limestone. X-1/2. Stope under head of incline Continental Chief mine. Lake County, Colorado. 1935. Figure 71, in U.S.Geological Survey Professional Paper 235. 1953. #1:/Colorado-Professional paper 235/bch00080 ID. Behre, C.H. 80 Breccia ore from Hellena vein X-1/2. From 4th level, Hellena mine. Fragments are altered porphyry embedded in mixed sulfides. Lake County, Colorado. 1935. Figure 73, in U.S.Geological Survey Professional Paper 235. 1953. #1:/New York-Professional paper 237/paw00052 ID. Postel, A.W. 52 Foliation in granitized amphibolite with crosscutting diabase dike, horizontal surface, NY State Highway 3, 1.1 miles west of Clayburg. Clinton County, New York. Circa 1945. Figure 10, in U.S.Geological Survey Professional Paper 237. 1952. #1:/New York-Professional paper 237/paw00057 ID. Postel, A.W. 57 Migmatite showing reverse-fault drag against pegmatite-filled overthrust-fault plane; Road cut on NY 374 near top of southeast side of Dannemora Mountain. Clinton County, New York. Circa 1945. Figure 14, in U.S.Geological Survey Professional Paper 237. 1952. #1:/New York-Professional paper 237/paw00106 ID. Postel, A.W. 106 Photomicrograph showing primary magnetite (black, euhedral) and secondary magnetite (black, containing unreplaced inclusions of microperthite), in Bowen-Signor mine; crossed nicols. Clinton County, New York. Circa 1945. Figure 15, in U.S.Geological Survey Professional Paper 237. 1952. #1:/New York-Professional paper 237/paw00107 ID. Postel, A.W. 107 Photomicrograph showing secondary magnetite (black, center area) replacing and crosscutting cataclastic texture, Bowen-Signor mine; crossed nicols. Clinton County, New York. Circa 1945. Figure 16, in U.S.Geological Survey Professional Paper 237. 1952. #1:/New York-Professional paper 237/paw00108 ID. Postel, A.W. 108 Photomicrograph showing secondary magnetite (black) replacing shattered quartz. Tremblay mine. Crossed nicols. Clinton County, New York. Circa 1945. Figure 17, in U.S.Geological Survey Professional Paper 237. 1952. #1:/New York-Professional paper 237/paw00109 ID. Postel, A.W. 109 Photomicrograph showing secondary quartz (white) separating magnetite (black) from pyroxene (gray), Lynch prospect. Crossed nicols. Clinton County, New York. Circa 1945. Figure 18, in U.S.Geological Survey Professional Paper 237. 1952. #1:/New York-Professional paper 237/paw00110 ID. Postel, A.W. 110 Diabase dike in back of crosscut, 2,113 foot level, Chateaugay mine, Lyon Mountain. Clinton County, New York. Circa 1945. Figure 7, in U.S.Geological Survey Professional Paper 237. 1952. #1:/New York-Professional paper 237/paw00111 ID. Postel, A.W. 111 Small-scale folding in Lyon Mountain granite gneiss: vertical section, Williams Street, Lyon Mountain. Clinton County, New York. Circa 1945. Figure 8, in U.S.Geological Survey Professional Paper 237. 1952. #1:/New York-Professional paper 237/paw00112 ID. Postel, A.W. 112 Foliation in Lyon Mountain granite gneiss: crosscutting pegmatite at upper right; exposure on creek at Black Brook mine. Clinton County, New York. Circa 1945. Figure 11, in U.S.Geological Survey Professional Paper 237. 1952. #1:/New York-Professional paper 237/paw00113 ID. Postel, A.W. 113 Pegmatite parallel to mineral lineation of Lyon Mountain granite gneiss, viewed from underside of foliation plane: South end of Duncan Mountain. Clinton County, New York. Circa 1945. Figure 13, in U.S.Geological Survey Professional Paper 237. 1952. #1:/New York-Professional paper 237/paw00114 ID. Postel, A.W. 114 Skarn boudinage replaced in part by magnetite; outcrop of the footwall vein, Chateaugay mine, Lyon Mountain. Clinton County, New York. Circa 1945. Figure 36, in U.S.Geological Survey Professional Paper 237. 1952. #1:/New York-Professional paper 237/paw00115 ID. Postel, A.W. 115 Photomicrograph showing mortar texture in microcline granite gneiss: Probable starting point in the formation of microantiperthite granite. Crossed nicols. Clinton County, New York. Circa 1945. Figure 3, in U.S.Geological Survey Professional Paper 237. 1952. #1:/New York-Professional paper 237/paw00116 ID. Postel, A.W. 116 Photomicrograph: showing possible initial phase of replacement of potash feldspar by oligoclase in the formation of microantiperthite granite gneiss. Crossed nicols. Clinton County, New York. Circa 1945. Figure 4, in U.S.Geological Survey Professional Paper 237. 1952. #1:/New York-Professional paper 237/paw00117 ID. Postel, A.W. 117 Photomicrograph of microantiperthite granite gneiss, possible end phase of replacement of potash feldspar by oligoclase; Crossed nicols. Clinton County, New York. Circa 1945. Figure 5, in U.S.Geological Survey Professional Paper 237. 1952. #1:/Idaho-Professional paper 238/lwb00257 ID. Lang, W.B. 257 Down the Blackfoot River valley similar to that in Lang photo 279a, but taken from the next higher point, in the NW1/4NE1/4 sec. 4 T. 4 S., R. 39 E. This view shows the later canyon in the earlier valley floor. Bingham County, Idaho. August 1925. Figure 7, in U.S.Geological Survey Professional Paper 238. 1952. #1:/Idaho-Professional paper 238/lwb00273 ID. Lang, W.B. 273 Down a small side canyon into the Blackfoot River canyon in sec. 10, T. 3S., R. 38 E. Paradise Valley quadrangle. The valley flow of basalt wedges out against the Salt Lake formation; note the bedding and "badland" erosion. Bingham County, Idaho. August 1925. Figure 8, in U.S.Geological Survey Professional Paper 238. 1952. #1:/Idaho-Professional paper 238/lwb0277a ID. Lang, W.B. 277a Form a panorama of Miner Creek area, looking south about SE ¼ SE1/4 sec. 28, T. 2 S., R. 39 E., Paradise Valley quadrangle. Supposed erosion cycles; Gannett; Elk Valley; Dry Fork; Blackfoot. Bingham County, Idaho. August 1925. Figure 3, in U.S.Geological Survey Professional Paper 238. 1952. #1:/Idaho-Professional paper 238/lwb0277b ID. Lang, W.B. 277b Form a panorama of Miner Creek area, looking south about SE ¼ SE1/4 sec. 28, T. 2 S., R. 39 E., Paradise Valley quadrangle. Supposed erosion cycles; Gannett; Elk Valley; Dry Fork; Blackfoot. Bingham County, Idaho. August 1925. Figure 3, in U.S.Geological Survey Professional Paper 238. 1952. #1:/Idaho-Professional paper 238/lwb00279 ID. Lang, W.B. 279 Composed as one photograph: View northwest down the Blackfoot River valley from a point in the SW ¼ SE ¼ sec. 33, T. 3 S., R. 39 E., Paradise Valley quadrangle, showing remnant wedges of basalt flows that have affected the development of the valley. Bingham County, Idaho. August 1925. Figure 6, in U.S.Geological Survey Professional Paper 238. 1952. #1:/Idaho-Professional paper 238/lwb00282 ID. Lang, W.B. 282 Down the Blackfoot River canyon from a point in sec. 10, T. 3 S., R. 38 E., Paradise Valley quadrangle; basalt overlies the Salt Lake formation, which shows (light color) in the middle distance. Bingham County, Idaho. August 1925. Figure 9, in U.S.Geological Survey Professional Paper 238. 1952. #1:/Idaho-Professional paper 238/mgr00200 ID. Mansfield, G.R. 200 Wall of Higham grit, viewed across strike: in sec. 3, T. 4 S., R. 38 E. Paradise Valley quadrangle. Bingham County, Idaho. August 30, 1913. Figure 15, in U.S.Geological Survey Professional Paper 238. 1952. #1:/Idaho-Professional paper 238/mgr00344 ID. Mansfield, G.R. 344 Form a panorama of Willow Creek canyon southward from its rim in about north central sec. 5, T. 1 N., R. 40 E., Ammon quadrangle; two stages of canyon cutting are shown. Bonneville County, Idaho. August 1, 1917. Figure 4, in U.S.Geological Survey Professional Paper 238. 1952. #1:/Idaho-Professional paper 238/mgr00346 ID. Mansfield, G.R. 346 Basalt-topped hill partly enclosed by an entrenched meander of Grays Lake outlet, east of Pine Mountain in NW ¼ sec. 4, T. 2 S., R. 41 E. Hell Creek quadrangle. Bonneville County, Idaho. August 4, 1917. Figure 4, in U.S.Geological Survey Professional Paper 238. 1952. #1:/Idaho-Professional paper 238/mgr00669 ID. Mansfield, G.R. 669 Salt Lake formation in the NW ¼ SE ¼ sec. 2 T. 5 S., R. 38 E., Paradise Valley quadrangle. Bannock County, Idaho. August 27, 1923. Figure 16, in U.S.Geological Survey Professional Paper 238. 1952. #1:/Idaho-Professional paper 238/mgr00762 ID. Mansfield, G.R. 762 Gateway of Wolverine Creek canyon in Brazer limestone: from a point on the south side near B.M. 6790, sec. 12, T. 2 S., R.38 E., Ammon quadrangle. Bonneville County, Idaho. September 12, 1925. Figure 10, in U.S.Geological Survey Professional Paper 238. 1952. #1:/Idaho-Professional paper 238/mgr00767 ID. Mansfield, G.R. 767 The same ledges of the Rex chert member of the Phosphoria formation shown in Mansfield photo 768, viewed across the strike. Bonneville County, Idaho. September 25, 1925. Figure 14, in U.S.Geological Survey Professional Paper 238. 1952. #1:/Idaho-Professional paper 238/mgr00768 ID. Mansfield, G.R. 768 Wall-like ledges of the Rex chert member of the Phosphoria formation, viewed along the strike, in the NE ¼ sec. 6, T.2 N, R. 39 E., and the adjacent section to the north. Ammon quadrangle. Bonneville County, Idaho. September 25, 1925. Figure 13, in U.S.Geological Survey Professional Paper 238. 1952. #1:/Idaho-Professional paper 238/mgr00853 ID. Mansfield, G.R. 853 Secondary (sand) dunes in sec. 9 T. 1 N., R.38 E., Ammon quadrangle; note the wind ripples and curved front. Bonneville County, Idaho. July 20, 1928. Figure 10, in U.S.Geological Survey Professional Paper 238. 1952. #1:/Idaho-Professional paper 238/mgr00864 ID. Mansfield, G.R. 864 Beds of volcanic ash in a road cut in NW ¼ NW ¼ sec. 33, T. 2 N., R. 39 E., Ammon quadrangle. Bonneville County, Idaho. 1930. Figure 21, in U.S.Geological Survey Professional Paper 238. 1952. #1:/Idaho-Professional paper 238/mgr00865 ID. Mansfield, G.R. 865 Eroded volcanic tuff near the road into Willow Creek valley in about the SW ¼ SE ¼ sec. 17, T. 2 N., R. 40 E., just north of the boundary of the Ammon quadrangle. Bonneville County, Idaho. July 30, 1930. Figure 22, in U.S.Geological Survey Professional Paper 238. 1952. #1:/Idaho-Professional paper 238/mgr00866 ID. Mansfield, G.R. 866 Beds of welded rhyolitic tuff overlying volcanic ash in the NE ¼ SE ¼ sec. 19, T.2 N., R. 39 E., Ammon quadrangle; detailed side view, showing a small fault. Bonneville County, Idaho. July 31, 1930. Figure 20, in U.S.Geological Survey Professional Paper 238. 1952. #1:/Idaho-Professional paper 238/mgr00872 ID. Mansfield, G.R. 872 Volcanic plug near the junction of Willow Creek and Grays Creek outlet in the NW ¼ SE ¼ sec. 32, T. 1 N, R. 40 E., Ammon quadrangle. Bonneville County, Idaho. August 30, 1930. Figure 22, in U.S.Geological Survey Professional Paper 238. 1952. #1:/United States-Professional paper 239/snw01049 ID. Shupe, N.W. 1049 Scaphites of the Colorado group Western interior, United States. Plate 15, in U.S.Geological Survey Professional Paper 239. 1951. #1:/United States-Professional paper 239/snw01052 ID. Shupe, N.W. 1052 Scaphites of the Colorado group Western interior, United States. Plate 1, in U.S.Geological Survey Professional Paper 239. 1951. #1:/United States-Professional paper 239/snw01053 ID. Shupe, N.W. 1053 Scaphites of the Colorado group Western interior, United States. Plate 2, in U.S.Geological Survey Professional Paper 239. 1951. #1:/United States-Professional paper 239/snw01054 ID. Shupe, N.W. 1054 Scaphites of the Colorado group Western interior, United States. Plate 3, in U.S.Geological Survey Professional Paper 239. 1951. #1:/United States-Professional paper 239/snw01055 ID. Shupe, N.W. 1055 Scaphites of the Colorado group Western interior, United States. Plate 4, in U.S.Geological Survey Professional Paper 239. 1951. #1:/United States-Professional paper 239/snw01056 ID. Shupe, N.W. 1056 Scaphites of the Colorado group Western interior, United States. Plate 5, in U.S.Geological Survey Professional Paper 239. 1951. #1:/United States-Professional paper 239/snw01057 ID. Shupe, N.W. 1057 Scaphites of the Colorado group Western interior, United States. Plate 6, in U.S.Geological Survey Professional Paper 239. 1951. #1:/United States-Professional paper 239/snw01058 ID. Shupe, N.W. 1058 Scaphites of the Colorado group Western interior, United States. Plate 7, in U.S.Geological Survey Professional Paper 239. 1951. #1:/United States-Professional paper 239/snw01059 ID. Shupe, N.W. 1059 Scaphites of the Colorado group Western interior, United States. Plate 8, in U.S.Geological Survey Professional Paper 239. 1951. #1:/United States-Professional paper 239/snw01060 ID. Shupe, N.W. 1060 Scaphites of the Colorado group Western interior, United States. Plate 9, in U.S.Geological Survey Professional Paper 239. 1951. #1:/United States-Professional paper 239/snw01061 ID. Shupe, N.W. 1061 Scaphites of the Colorado group Western interior, United States. Plate 10, in U.S.Geological Survey Professional Paper 239. 1951. #1:/United States-Professional paper 239/snw01062 ID. Shupe, N.W. 1062 Scaphites of the Colorado group Western interior, United States. Plate 11, in U.S.Geological Survey Professional Paper 239. 1951. #1:/United States-Professional paper 239/snw01063 ID. Shupe, N.W. 1063 Scaphites of the Colorado group Western interior, United States. Plate 12, in U.S.Geological Survey Professional Paper 239. 1951. #1:/United States-Professional paper 239/snw01064 ID. Shupe, N.W. 1064 Scaphites of the Colorado group Western interior, United States. Plate 13, in U.S.Geological Survey Professional Paper 239. 1951. #1:/United States-Professional paper 239/snw01065 ID. Shupe, N.W. 1065 Scaphites of the Colorado group Western interior, United States. Plate 14, in U.S.Geological Survey Professional Paper 239. 1951. #1:/United States-Professional paper 239/snw01066 ID. Shupe, N.W. 1066 Scaphites of the Colorado group Western interior, United States. Plate 21, in U.S.Geological Survey Professional Paper 239. 1951. #1:/United States-Professional paper 239/snw01067 ID. Shupe, N.W. 1067 Scaphites of the Colorado group Western interior, United States. Plate 16, in U.S.Geological Survey Professional Paper 239. 1951. #1:/United States-Professional paper 239/snw01068 ID. Shupe, N.W. 1068 Scaphites of the Colorado group Western interior, United States. Plate 17, in U.S.Geological Survey Professional Paper 239. 1951. #1:/United States-Professional paper 239/snw01069 ID. Shupe, N.W. 1069 Scaphites of the Colorado group Western interior, United States. Plate 18, in U.S.Geological Survey Professional Paper 239. 1951. #1:/United States-Professional paper 239/snw01070 ID. Shupe, N.W. 1070 Scaphites of the Colorado group Western interior, United States. Plate 19, in U.S.Geological Survey Professional Paper 239. 1951. #1:/United States-Professional paper 239/snw01071 ID. Shupe, N.W. 1071 Scaphites of the Colorado group Western interior, United States. Plate 20, in U.S.Geological Survey Professional Paper 239. 1951. #1:/Alaska-Professional paper 236/taph0001 ID. Tappan, H. 1 Bathysiphon, jaculella, reophax. Northern Alaska. Plate 7, in U.S.Geological Survey Professional Paper 236. 1955. #1:/Alaska-Professional paper 236/taph0002 ID. Tappan, H. 2 Reophax, involutina, glomospira, gaudryina. Northern Alaska. Plate 8, in U.S.Geological Survey Professional Paper 236. 1955. #1:/Alaska-Professional paper 236/taph0003 ID. Tappan, H. 3 Involutina, glomospira, litotuba, haplophragmoides. Northern Alaska. Plate 9, in U.S.Geological Survey Professional Paper 236. 1955. #1:/Alaska-Professional paper 236/taph0004 ID. Tappan, H. 4 Haplophragmoides. Northern Alaska. Plate 10, in U.S.Geological Survey Professional Paper 236. 1955. #1:/Alaska-Professional paper 236/taph0005 ID. Tappan, H. 5 Haplophragmoides Ammobaculites. Northern Alaska. Plate 11, in U.S.Geological Survey Professional Paper 236. 1955. #1:/Alaska-Professional paper 236/taph0006 ID. Tappan, H. 6 Ammobaculites. Northern Alaska. Plate 12, in U.S.Geological Survey Professional Paper 236. 1955. #1:/Alaska-Professional paper 236/taph0007 ID. Tappan, H. 7 Ammobaculites, triplasia, spiroplectammina, textularia gaudryina. Northern Alaska. Plate 13, in U.S.Geological Survey Professional Paper 236. 1955. #1:/Alaska-Professional paper 236/taph0008 ID. Tappan, H. 8 Gaudryina, dorothia, trochammina. Northern Alaska. Plate 14, in U.S.Geological Survey Professional Paper 236. 1955. #1:/Alaska-Professional paper 236/taph0009 ID. Tappan, H. 9 Lenticulina, darbyella. Northern Alaska. Plate 15, in U.S.Geological Survey Professional Paper 236. 1955. #1:/Alaska-Professional paper 236/taph0010 ID. Tappan, H. 10 Lenticulina. Northern Alaska. Plate 16, in U.S.Geological Survey Professional Paper 236. 1955. #1:/Alaska-Professional paper 236/taph0011 ID. Tappan, H. 11 Astacolus, marginulinopsis. Northern Alaska. Plate 17, in U.S.Geological Survey Professional Paper 236. 1955. #1:/Alaska-Professional paper 236/taph0012 ID. Tappan, H. 12 Lenticulina, astacolus, marginulina. Northern Alaska. Plate 18, in U.S.Geological Survey Professional Paper 236. 1955. #1:/Alaska-Professional paper 236/taph0013 ID. Tappan, H. 13 Astacolus, marginulina. Northern Alaska. Plate 19, in U.S.Geological Survey Professional Paper 236. 1955. #1:/Alaska-Professional paper 236/taph0014 ID. Tappan, H. 14 Marginulina. Northern Alaska. Plate 20, in U.S.Geological Survey Professional Paper 236. 1955. #1:/Alaska-Professional paper 236/taph0015 ID. Tappan, H. 15 Marginulina, dentalina. Northern Alaska. Plate 21, in U.S.Geological Survey Professional Paper 236. 1955. #1:/Alaska-Professional paper 236/taph0016 ID. Tappan, H. 16 Marginulina, vaginulina. Northern Alaska. Plate 22, in U.S.Geological Survey Professional Paper 236. 1955. #1:/Alaska-Professional paper 236/taph0017 ID. Tappan, H. 17 Dentalina, vaginulina. Northern Alaska. Plate 23, in U.S.Geological Survey Professional Paper 236. 1955. #1:/Alaska-Professional paper 236/taph0018 ID. Tappan, H. 18 Nodosaria. Northern Alaska. Plate 24, in U.S.Geological Survey Professional Paper 236. 1955. #1:/Alaska-Professional paper 236/taph0019 ID. Tappan, H. 19 Nodosaria. Northern Alaska. Plate 25, in U.S.Geological Survey Professional Paper 236. 1955. #1:/Alaska-Professional paper 236/taph0020 ID. Tappan, H. 20 Vaginulina, vaginulinopsis, nodosaria, rectoglandulina, planularia, saracenaria. Northern Alaska. Plate 26, in U.S.Geological Survey Professional Paper 236. 1955. #1:/Alaska-Professional paper 236/taph0021 ID. Tappan, H. 21 Lingulina, frondicularia. Northern Alaska. Plate 27, in U.S.Geological Survey Professional Paper 236. 1955. #1:/Alaska-Professional paper 236/taph0022 ID. Tappan, H. 22 Citharina, lagena, eoguttulina, paleopolymorphina, globulina. Northern Alaska. Plate 28, in U.S.Geological Survey Professional Paper 236. 1955. #1:/Alaska-Professional paper 236/taph0023 ID. Tappan, H. 23 Outcrop of Kingak formation on the Canning River, oblique aerial photograph, looking westward across the Canning River toward the exposure of Kingak shale in the cut banks, the promontory in the center of the picture separates the two cut banks from which microfossil samples were collected by George Gryc. Northern Alaska. 1947. Plate 6, in U.S.Geological Survey Professional Paper 236. 1955. #1:/Alaska-Professional paper 236/taph0024 ID. Tappan, H. 24 Bathysiphon, saccammina, hyperamminoides, glomospira, and glomospirella. Northern Alaska. Plate 29, in U.S.Geological Survey Professional Paper 236. 1962. #1:/Alaska-Professional paper 236/taph0025 ID. Tappan, H. 25 Ammodiscus, reophax and haplophragmoides. Northern Alaska. Plate 30, in U.S.Geological Survey Professional Paper 236. 1962. #1:/Alaska-Professional paper 236/taph0026 ID. Tappan, H. 26 Haplophragmoides. Northern Alaska. Plate 31, in U.S.Geological Survey Professional Paper 236. 1962. #1:/Alaska-Professional paper 236/taph0027 ID. Tappan, H. 27 Ammobaculites and verneuilinoides. Northern Alaska. Plate 32, in U.S.Geological Survey Professional Paper 236. 1962. #1:/Alaska-Professional paper 236/taph0028 ID. Tappan, H. 28 Spiroplectammina, textularia, flabellammina, and uvigerinammina. Northern Alaska. Plate 33, in U.S.Geological Survey Professional Paper 236. 1962. #1:/Alaska-Professional paper 236/taph0029 ID. Tappan, H. 29 Verneuilinoides, siphotextularia and gaudryina. Northern Alaska. Plate 34, in U.S.Geological Survey Professional Paper 236. 1962. #1:/Alaska-Professional paper 236/taph0030 ID. Tappan, H. 30 Gaudryina and gaudryinella. Northern Alaska. Plate 35, in U.S.Geological Survey Professional Paper 236. 1962. #1:/Alaska-Professional paper 236/taph0031 ID. Tappan, H. 31 Gaudryina, arenobulimina, pseudoclavulina, and miliammina. Northern Alaska. Plate 36, in U.S.Geological Survey Professional Paper 236. 1962. #1:/Alaska-Professional paper 236/taph0032 ID. Tappan, H. 32 Miliammina, quinqueloculina and psamminopelta. Northern Alaska. Plate 37, in U.S.Geological Survey Professional Paper 236. 1962. #1:/Alaska-Professional paper 236/taph0033 ID. Tappan, H. 33 Trochammina. Northern Alaska. Plate 38, in U.S.Geological Survey Professional Paper 236. 1962. #1:/Alaska-Professional paper 236/taph0034 ID. Tappan, H. 34 Trochammina. Northern Alaska. Plate 39, in U.S.Geological Survey Professional Paper 236. 1962. #1:/Alaska-Professional paper 236/taph0035 ID. Tappan, H. 35 Lenticulina. Northern Alaska. Plate 40, in U.S.Geological Survey Professional Paper 236. 1962. #1:/Alaska-Professional paper 236/taph0036 ID. Tappan, H. 36 Lenticulina and saracenarai. Northern Alaska. Plate 41, in U.S.Geological Survey Professional Paper 236. 1962. #1:/Alaska-Professional paper 236/taph0037 ID. Tappan, H. 37 Saracenaria and marginulinopsis. Northern Alaska. Plate 42, in U.S.Geological Survey Professional Paper 236. 1962. #1:/Alaska-Professional paper 236/taph0038 ID. Tappan, H. 38 Marginulinopsis and marginulina. Northern Alaska. Plate 43, in U.S.Geological Survey Professional Paper 236. 1962. #1:/Alaska-Professional paper 236/taph0039 ID. Tappan, H. 39 Marginulinopsis, marginulina, rectoglandulina and lingulina. Northern Alaska. Plate 44, in U.S.Geological Survey Professional Paper 236. 1962. #1:/Alaska-Professional paper 236/taph0040 ID. Tappan, H. 40 Nodosaria and dentalina. Northern Alaska. Plate 45, in U.S.Geological Survey Professional Paper 236. 1962. #1:/Alaska-Professional paper 236/taph0041 ID. Tappan, H. 41 Vaginulina, astacolus, and vaginulinopsis. Northern Alaska. Plate 46, in U.S.Geological Survey Professional Paper 236. 1962. #1:/Alaska-Professional paper 236/taph0042 ID. Tappan, H. 42 Vaginulinopsis, citharina, citharinella, frondicularia, oolina, paleopolymorphina, pyrulinoides, and globulina. Northern Alaska. Plate 47, in U.S.Geological Survey Professional Paper 236. 1962. #1:/Alaska-Professional paper 236/taph0043 ID. Tappan, H. 43 Neobulimina and praebulimina. Northern Alaska. Plate 48, in U.S.Geological Survey Professional Paper 236. 1962. #1:/Alaska-Professional paper 236/taph0044 ID. Tappan, H. 44 Praebulimina, caucasina, and lacosteina. Northern Alaska. Plate 49, in U.S.Geological Survey Professional Paper 236. 1962. #1:/Alaska-Professional paper 236/taph0045 ID. Tappan, H. 45 Pallaimorphina and nonionella. Northern Alaska. Plate 50, in U.S.Geological Survey Professional Paper 236. 1962. #1:/Alaska-Professional paper 236/taph0046 ID. Tappan, H. 46 Eponides. Northern Alaska. Plate 51, in U.S.Geological Survey Professional Paper 236. 1962. #1:/Alaska-Professional paper 236/taph0047 ID. Tappan, H. 47 Conorboides. Northern Alaska. Plate 52, in U.S.Geological Survey Professional Paper 236. 1962. #1:/Alaska-Professional paper 236/taph0048 ID. Tappan, H. 48 Conorbina and eurycheilostoma. Northern Alaska. Plate 53, in U.S.Geological Survey Professional Paper 236. 1962. #1:/Alaska-Professional paper 236/taph0049 ID. Tappan, H. 49 Valvulineria and Eoeponidella. Northern Alaska. Plate 54, in U.S.Geological Survey Professional Paper 236. 1962. #1:/Alaska-Professional paper 236/taph0050 ID. Tappan, H. 50 Heterohelix, hedbergella and globorotalites. Northern Alaska. Plate 55, in U.S.Geological Survey Professional Paper 236. 1962. #1:/Alaska-Professional paper 236/taph0051 ID. Tappan, H. 51 Gavelinella. Northern Alaska. Plate 56, in U.S.Geological Survey Professional Paper 236. 1962. #1:/Alaska-Professional paper 236/taph0052 ID. Tappan, H. 52 Gavelinella. Northern Alaska. Plate 57, in U.S.Geological Survey Professional Paper 236. 1962. #1:/Alaska-Professional paper 236/taph0053 ID. Tappan, H. 53 Gavelinella and anomalinoides. Northern Alaska. Plate 58, in U.S.Geological Survey Professional Paper 236. 1962. #1:/Texas-Professional paper 242/slw00637 ID. Stephenson, L.W. 637 Views of sandstones of the Lewisville member of the Woodbine formation: Fossiliferous sandstone of the Lewisville member (locality 79) in a small south flowing branch of Timber Creek, 2.5 miles southwest of Lewisville, Denton County, Texas. Plate 5-A, in U.S.Geological Survey Professional Paper 242. 1952 #1:/Texas-Professional paper 242/slw01613 ID. Stephenson, L.W. 1613 Views of the Lewisville, Dexter and Euless members of the Woodbine formation: Buda limestone overlain by Lewisville member of Woodbine formation (locality 1) in bed and bank of Keyes Branch near old Bosqueville. J. B. Reeside standing on contact. McLennan County, Texas. Plate 4-A, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01614 ID. Stephenson, L.W. 1614 Views of the Lewisville, Dexter and Euless members of the Woodbine formation: Shale and interbedded calcareous sandstone of the upper part of the Lewisville member (locality 55) in a small branch of Big Bear Creek near Euless. Tarrant County, Texas. Plate 4-B, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01615 ID. Stephenson, L.W. 1615 Views of the Lewisville, Dexter and Euless members of the Woodbine formation: Typical thick-bedded sandstone of the Lewisville member overlain by shale and interbedded sandstone (= Tarrant unit of Moreman) of the same member (locality 39) in cut of Chicago, Rock Island and Pacific Railroad at Dorothy Siding, Tarrant County, Texas. Plate 4-C, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01616 ID. Stephenson, L.W. 1616 Views of the Lewisville, Dexter and Euless members of the Woodbine formation: Light gray massive sandstone of the Dexter member overlain by shale of the Euless member (locality 25) in highway cut west of Euless. Standing at contact, left to right, are W.B. Blanpied, I.B. Hamilton, A.M. Lloyd, W.C. Spooner, R.T. Hazzard, and H.H. Gray. Tarrant County, Texas. Plate 4-D, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01617 ID. Stephenson, L.W. 1617 Views of sandstones of the Lewisville member of the Woodbine formation: Sandstone of the Lewisville member in par fossiliferous, in bed of Timber Creek (locality 75) 3 miles west by south of Lewisville. Denton County, Texas. Plate 5-B, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01618 ID. Stephenson, L.W. 1618 Views of sandstones of the Lewisville member of the Woodbine formation: Thick- bedded sandstone of the Lewisville member overlain by fossiliferous shale (locality 42) and interbedded sandstone beds in road cut northeast of Tarrant Station, Tarrant County, Texas. Plate5-C, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01619 ID. Stephenson, L.W. 1619 Views of sandstones of the Lewisville member of the Woodbine formation: Friable brown ferruginous sandstone of the Lewisville member in branch of Sandy Creek, north of Sadler; contains abundant prints of fossils (locality 132). Grayson County, Texas. Plate 5-D, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01620 ID. Stephenson, L.W. 1620 Views of oyster reefs and sandstone of the Lewisville member of the Woodbine formation: Sandstone and in foreground reefs of ostrea soleniscus Meek of the Lewisville member (locality 85) below spillway at Lake Dallas Dam (Garza Dam), 5 miles north of Lewisville. Denton County, Texas. Plate 6-A, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01621 ID. Stephenson, L.W. 1621 Views of oyster reefs and sandstone of the Lewisville member of the Woodbine formation: Detail of one of the oyster reefs shown in photo 1620: elongation of the oyster shells in a crowded habitat is a conspicuous feature in the reefs in this locality. Denton County, Texas. Plate 6-B, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01622 ID. Stephenson, L.W. 1622 Views of oyster reefs and sandstone of the Lewisville member of the Woodbine formation: Tuffaceous sand, partly indurated to concretionary sandstone masses of the Lewisville member, near upstream end of Hyatts Bluff, Red River 4.5 miles northwest of Ravenna. Fannin County, Texas. Plate 6-C, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01623 ID. Stephenson, L.W. 1623 Views of oyster reefs and sandstone of the Lewisville member of the Woodbine formation: Prominent mass of tuffaceous sandstone underlain by dark gray shaly clay and gray calcareous sand (locality 179) of the Lewisville member, at the downstream end of Hyatts Bluff, Red River 4.5 miles northwest of Ravenna. Fannin County, Texas. Plate 6-D, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01624 ID. Stephenson, L.W. 1624 Views of the Templeton and Lewisville members of the Woodbine formation: Massive argillaceous glauconitic sand of the Lewisville member, in right bank of Sheep Creek, northeast of Savoy. Fannin County, Texas. Plate 7-A, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01625 ID. Stephenson, L.W. 1625 Views of the Templeton and Lewisville members of the Woodbine formation: Fossiliferous fine gray sandstone and interbedded shale (locality 201) of the Templeton member in the bed of Red River, right side, near old Slate Shoals. This important fossil locality, well exposed from 1924-29 was later abandoned by the shifting river and was covered by alluvial sand; in 1941 the locality was a flat plain supporting a thick growth of willows. Lamar County, Texas. Plate 7-B, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01626 ID. Stephenson, L.W. 1626 Views of the Templeton and Lewisville members of the Woodbine formation: A stringer of white alunite nodules in fine sand of the Templeton member, a few inches below a bed of hard irregularly bedded, platy calcareous sandstone forming the base of the Eagle Ford shale in a cut of U.S. Highway 82, 4 miles east by south of Whitesboro. Grayson County, Texas. Plate 7-C, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01627 ID. Stephenson, L.W. 1627 Views of the Templeton and Lewisville members of the Woodbine formation: Band of white alunite nodules in dark shale of the Templeton member overlain by typical calcareous shale of the Eagle Ford shale, in a small branch of Little Elm Creek, about 0.02 miles east of north-south road, 3.65 miles north by east of Navo. Denton County, Texas. Plate 7-D, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01648 ID. Stephenson, L.W. 1648 Sponges and chaetopods from the Woodbine formation: Texas. Plate 8, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01649 ID. Stephenson, L.W. 1649 Bryozoa from the Woodbine formations: Texas. Plate 9, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01650 ID. Stephenson, L.W. 1650 Bryozoa, brachiopods, and pelecypods from the Woodbine formations: Texas. Plate 10, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01651 ID. Stephenson, L.W. 1651 Pelecypods from the Woodbine formations: Texas. Plate 11, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01652 ID. Stephenson, L.W. 1652 Pelecypods from the Woodbine formations: Texas. Plate 12, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01653 ID. Stephenson, L.W. 1653 Pelecypods from the Woodbine formations: Texas. Plate 13, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01654 ID. Stephenson, L.W. 1654 Pelecypods from the Woodbine formations: Texas. Plate 14, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01655 ID. Stephenson, L.W. 1655 Pelecypods from the Woodbine formations: Texas. Plate 15, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01656 ID. Stephenson, L.W. 1656 Pelecypods from the Woodbine formations: Texas. Plate 16, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01657 ID. Stephenson, L.W. 1657 Pelecypods from the Woodbine formations: Texas. Plate 17, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01658 ID. Stephenson, L.W. 1658 Pelecypods from the Woodbine formations: Texas. Plate 18, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01659 ID. Stephenson, L.W. 1659 Pelecypods from the Woodbine formations: Texas. Plate 19, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01660 ID. Stephenson, L.W. 1660 Pelecypods from the Woodbine formations: Texas. Plate 20, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01628 ID. Stephenson, L.W. 1628 Pelecypods from the Woodbine formations: Texas. Plate 30, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01629 ID. Stephenson, L.W. 1629 Pelecypods from the Woodbine formations: Texas. Plate 31, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01630 ID. Stephenson, L.W. 1630 Pelecypods from the Woodbine formations: Texas. Plate 32, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01631 ID. Stephenson, L.W. 1631 Pelecypods from the Woodbine formations: Texas. Plate 33, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01632 ID. Stephenson, L.W. 1632 Pelecypods and scaphopods from the Woodbine formations: Texas. Plate 34, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01633 ID. Stephenson, L.W. 1633 Gastropods from the Woodbine formations: Texas. Plate 35, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01634 ID. Stephenson, L.W. 1634 Gastropods from the Woodbine formations: Texas. Plate 36, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01635 ID. Stephenson, L.W. 1635 Gastropods from the Woodbine formations: Texas. Plate 37, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01636 ID. Stephenson, L.W. 1636 Gastropods from the Woodbine formations: Texas. Plate 38, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01637 ID. Stephenson, L.W. 1637 Gastropods from the Woodbine formations: Texas. Plate 39, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01638 ID. Stephenson, L.W. 1638 Gastropods from the Woodbine formations: Texas. Plate 40, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01639 ID. Stephenson, L.W. 1639 Gastropods from the Woodbine formations: Texas. Plate 41, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01640 ID. Stephenson, L.W. 1640 Gastropods from the Woodbine formations: Texas. Plate 42, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01641 ID. Stephenson, L.W. 1641 Gastropods from the Woodbine formations: Texas. Plate 43, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01642 ID. Stephenson, L.W. 1642 Pelecypods and cephalopods from the Woodbine formations: Texas. Plate 44, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01643 ID. Stephenson, L.W. 1643 Cephalopods from the Woodbine formations: Texas. Plate 45, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01644 ID. Stephenson, L.W. 1644 Pelecypods and cephalopods from the Woodbine formations: Texas. Plate 46, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01645 ID. Stephenson, L.W. 1645 Cephalopods from the Woodbine formations: Texas. Plate 47, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01646 ID. Stephenson, L.W. 1646 Pelecypods and cephalopods from the Woodbine formations: Texas. Plate 48, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01647 ID. Stephenson, L.W. 1647 Cephalopods from the Woodbine formations: Texas. Plate 49, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01661 ID. Stephenson, L.W. 1661 Pelecypods from the Woodbine formations: Texas. Plate 21, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01662 ID. Stephenson, L.W. 1662 Pelecypods from the Woodbine formations: Texas. Plate 22, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01663 ID. Stephenson, L.W. 1663 Pelecypods from the Woodbine formations: Texas. Plate 23, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01664 ID. Stephenson, L.W. 1664 Pelecypods from the Woodbine formations: Texas. Plate 24, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01665 ID. Stephenson, L.W. 1665 Pelecypods from the Woodbine formations: Texas. Plate 25, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01666 ID. Stephenson, L.W. 1666 Pelecypods from the Woodbine formations: Texas. Plate 26, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01667 ID. Stephenson, L.W. 1667 Pelecypods from the Woodbine formations: Texas. Plate 27, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01668 ID. Stephenson, L.W. 1668 Pelecypods from the Woodbine formations: Texas. Plate 28, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01669 ID. Stephenson, L.W. 1669 Pelecypods from the Woodbine formations: Texas. Plate 29, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01670 ID. Stephenson, L.W. 1670 Cephalopods from the Woodbine formations: Texas. Plate 50, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01671 ID. Stephenson, L.W. 1671 Pelecypods and cephalopods from the Woodbine formations: Texas. Plate 51, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01672 ID. Stephenson, L.W. 1672 Cephalopods from the Woodbine formations: Texas. Plate 52, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01673 ID. Stephenson, L.W. 1673 Cephalopods from the Woodbine formations: Texas. Plate 53, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01674 ID. Stephenson, L.W. 1674 Pelecypods, gastropods, and cephalopods from the Woodbine formations: Texas. Plate 54, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01675 ID. Stephenson, L.W. 1675 Cephalopods from the Woodbine formations: Texas. Plate 55, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01676 ID. Stephenson, L.W. 1676 Cephalopod and crustaceans from the Woodbine formations: Texas. Plate 56, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01677 ID. Stephenson, L.W. 1677 Anthozoa and cephalopods from the Woodbine formations: Texas. Plate 57, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01678 ID. Stephenson, L.W. 1678 Fossils from the Woodbine formations: Texas. Plate 58, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Texas-Professional paper 242/slw01679 ID. Stephenson, L.W. 1679 Stenzel: decapods from the Woodbine formations: Texas. Plate 59, in U.S.Geological Survey Professional Paper 242. 1952. #1:/Montana-Professional paper 243/cwa00094 ID. Cobban, W.A. 94 Metoicoceras: Cenomania Ammonite Fauna from the Mosby Sandstone of central Montana. Plate 6, in U.S.Geological Survey Professional Paper 243. 1952. #1:/Montana-Professional paper 243/cwa00095 ID. Cobban, W.A. 95 Metoicoceras: Cenomania Ammonite Fauna from the Mosby Sandstone of central Montana. Plate 7, in U.S.Geological Survey Professional Paper 243. 1952. #1:/Montana-Professional paper 243/cwa00096 ID. Cobban, W.A. 96 Metoicoceras: Cenomania Ammonite Fauna from the Mosby Sandstone of central Montana. Plate 8, in U.S.Geological Survey Professional Paper 243. 1952. #1:/Montana-Professional paper 243/cwa00097 ID. Cobban, W.A. 97 Metoicoceras: Cenomania Ammonite Fauna from the Mosby Sandstone of central Montana. Plate 9, in U.S.Geological Survey Professional Paper 243. 1952. #1:/Montana-Professional paper 243/cwa00098 ID. Cobban, W.A. 98 Dunveganoceras: Cenomania Ammonite Fauna from the Mosby Sandstone of central Montana. Plate 10, in U.S.Geological Survey Professional Paper 243. 1952. #1:/Montana-Professional paper 243/cwa00099 ID. Cobban, W.A. 99 Dunveganoceras: Cenomania Ammonite Fauna from the Mosby Sandstone of central Montana. Plate 11, in U.S.Geological Survey Professional Paper 243. 1952. #1:/Montana-Professional paper 243/cwa00100 ID. Cobban, W.A. 100 Dunveganoceras: Cenomania Ammonite Fauna from the Mosby Sandstone of central Montana. Plate 12, in U.S.Geological Survey Professional Paper 243. 1952. #1:/Texas-Professional paper 243/hwh00010 ID. Hass, W. H. 10 Conodonts, Barnett Formation (Mississippian): Texas. Plate 14, in U.S.Geological Survey Professional Paper 243. 1952. #1:/Texas-Professional paper 243/hwh00011 ID. Hass, W. H. 11 Conodonts, Barnett Formation (Mississippian): Texas. Plate 15, in U.S.Geological Survey Professional Paper 243. 1952. #1:/Texas-Professional paper 243/hwh00012 ID. Hass, W. H. 12 Conodonts, Barnett Formation (Mississippian): Texas. Plate 16, in U.S.Geological Survey Professional Paper 243. 1952. #1:/Texas-Professional paper 243/slw01708 ID. Stephenson, L.W. 1708 Molluscan fossils mainly from the Pepper shale, Woodbine formation, McLennan County, Texas. Plate 13, in U.S.Geological Survey Professional Paper 243. 1952. #1:/Texas-Professional paper 243/slw01709 ID. Stephenson, L.W. 1709 Specimens and outcrops of ferruginous conglomerate, sand and sandstone: Basal ferruginous conglomerate from a ridge capped with the conglomerate, 2 miles northwest of Tanglewood; includes a well rounded pebble of quartzite sandstone derived from the Wilcox group. Lee County, Texas. Circa 1942. Plate 4-A, in U.S.Geological Survey Professional Paper 243. 1952. #1:/Texas-Professional paper 243/slw01710 ID. Stephenson, L.W. 1710 Specimens and outcrops of ferruginous conglomerate, sand and sandstone: Basal ferruginous conglomerate from a roadside exposure 0.35 miles north of site of Pilot Knob School, Freestone County, Texas. Circa 1942. Plate 4-B, in U.S.Geological Survey Professional Paper 243. 1952. #1:/Texas-Professional paper 243/slw01711 ID. Stephenson, L.W. 1711 Specimens and outcrops of ferruginous conglomerate, sand and sandstone: Irregularly bedded ferruginous sand and conglomerate (basal part of Reklaw?) in cut on US. Highway 84 at southwest edge of Reklaw, Cherokee County, Texas. Circa 1942. Plate 4-C, in U.S.Geological Survey Professional Paper 243. 1952. #1:/Texas-Professional paper 243/slw01712 ID. Stephenson, L.W. 1712 Specimens and outcrops of ferruginous conglomerate, sand and sandstone: Masses of ferruginous sandstone and conglomerate (basal part of Reklaw?) in road-metal pit on ridge about 2 miles northwest of Tanglewood, Lee County, Texas. Circa 1942. Plate 4- D, with graphic, in U.S.Geological Survey Professional Paper 243. 1952. #1:/Arkansas-Professional paper 243/slw01713 ID. Stephenson, L.W. 1713 Outcrops of quartzitic sandstone and fossiliferous ferruginous sandstone: Mass of fine white quartzite sandstone with root impressions, in a clay pit in the Wilcox formation, 4.4 miles northeast of Texarkana, Miller County, Arkansas. Circa 1942. Plate 5-A, in U.S.Geological Survey Professional Paper 243. 1952. #1:/Texas-Professional paper 243/slw01714 ID. Stephenson, L.W. 1714 Outcrops of quartzitic sandstone and fossiliferous ferruginous sandstone: Fossiliferous ferruginous sandstone (Eocene) overlain by ferruginous conglomerate (basal part of Reklaw?), south for of Scruggs Creek, 4 miles north by east of Harwood, in Caldwell County, Texas. Circa 1942. Plate 5-B, in U.S.Geological Survey Professional Paper 243. 1952. #1:/Texas-Professional paper 243/slw01715 ID. Stephenson, L.W. 1715 Outcrops of quartzitic sandstone and fossiliferous ferruginous sandstone: Upper surface if quartzitic sandstone in lower part of Wilcox group in a field near the highway, 3 miles southwest of Sulphur Springs, Hopkins County, Texas. Circa 1942. Plate 5-C, in U.S.Geological Survey Professional Paper 243. 1952. #1:/Texas-Professional paper 243/slw01716 ID. Stephenson, L.W. 1716 Outcrops of quartzitic sandstone and fossiliferous ferruginous sandstone: A mass of quartzitic sandstone near the highway, 3.5 miles southwest of Sulphur Springs, showing root impressions at the broken end and pits marking the upper end of root impressions. Hopkins County, Texas. Circa 1942. Plate 5-D, in U.S.Geological Survey Professional Paper 243. 1952. #1:/South Dakota-Professional paper 243/sfm00023 ID. Swain, F.M. 23 Cytherellidae, cypridae and cytheridae: ostracodes from the upper part of the Sundance formation of South Dakota, Wyoming, and Southern Montana. Plate 1, in U.S.Geological Survey Professional Paper 243. 1952. #1:/South Dakota-Professional paper 243/sfm00024 ID. Swain, F.M. 24 Cytheridae: ostracodes from the upper part of the Sundance formation of South Dakota, Wyoming, and Southern Montana. Plate 2, in U.S.Geological Survey Professional Paper 243. 1952. #1:/Panama-Professional paper 244/cws00044 ID. Cole, W.S. 44 Eocene Lepidocyclina: Foraminifera from the Panama Canal Zone and Vicinity, Panama. Plate 9, in U.S.Geological Survey Professional Paper 244. 1952. #1:/Panama-Professional paper 244/cws00045 ID. Cole, W.S. 45 Eocene operculinoides and Oligocene heterostegina: Foraminifera from the Panama Canal Zone and Vicinity, Panama. Plate 1, in U.S.Geological Survey Professional Paper 244. 1952. #1:/Panama-Professional paper 244/cws00046 ID. Cole, W.S. 46 Eocene and Oligocene operculinoides: Foraminifera from the Panama Canal Zone and Vicinity, Panama. Plate 2, in U.S.Geological Survey Professional Paper 244. 1952. #1:/Panama-Professional paper 244/cws00047 ID. Cole, W.S. 47 Eocene and Oligocene operculinoides and camerina: Foraminifera from the Panama Canal Zone and Vicinity, Panama. Plate 3, in U.S.Geological Survey Professional Paper 244. 1952. #1:/Panama-Professional paper 244/cws00048 ID. Cole, W.S. 48 Eocene and Oligocene heterostegina: Foraminifera from the Panama Canal Zone and Vicinity, Panama. Plate 4, in U.S.Geological Survey Professional Paper 244. 1952. #1:/Panama-Professional paper 244/cws00049 ID. Cole, W.S. 49 Oligocene heterostegina: Foraminifera from the Panama Canal Zone and Vicinity, Panama. Plate 5, in U.S.Geological Survey Professional Paper 244. 1952. #1:/Panama-Professional paper 244/cws00050 ID. Cole, W.S. 50 Eocene Yaberinelia, helocostegina, and Oligocene heterostegina: Foraminifera from the Panama Canal Zone and Vicinity, Panama. Plate 6, in U.S.Geological Survey Professional Paper 244. 1952. #1:/Panama-Professional paper 244/cws00051 ID. Cole, W.S. 51 Eocene Lepidocyclina: Foraminifera from the Panama Canal Zone and Vicinity, Panama. Plate 7, in U.S.Geological Survey Professional Paper 244. 1952. #1:/Panama-Professional paper 244/cws00052 ID. Cole, W.S. 52 Eocene Lepidocyclina: Foraminifera from the Panama Canal Zone and Vicinity, Panama. Plate 8, in U.S.Geological Survey Professional Paper 244. 1952. #1:/Panama-Professional paper 244/cws00053 ID. Cole, W.S. 53 Eocene Lepidocyclina: Foraminifera from the Panama Canal Zone and Vicinity, Panama. Plate 10, in U.S.Geological Survey Professional Paper 244. 1952. #1:/Panama-Professional paper 244/cws00054 ID. Cole, W.S. 54 Eocene Lepidocyclina: Foraminifera from the Panama Canal Zone and Vicinity, Panama. Plate 11, in U.S.Geological Survey Professional Paper 244. 1952. #1:/Panama-Professional paper 244/cws00055 ID. Cole, W.S. 55 Eocene Lepidocyclina: Foraminifera from the Panama Canal Zone and Vicinity, Panama. Plate 12, in U.S.Geological Survey Professional Paper 244. 1952. #1:/Panama-Professional paper 244/cws00056 ID. Cole, W.S. 56 Eocene Lepidocyclina: Foraminifera from the Panama Canal Zone and Vicinity, Panama. Plate 13, in U.S.Geological Survey Professional Paper 244. 1952. #1:/Panama-Professional paper 244/cws00057 ID. Cole, W.S. 57 Eocene Lepidocyclina: Foraminifera from the Panama Canal Zone and Vicinity, Panama. Plate 14, in U.S.Geological Survey Professional Paper 244. 1952. #1:/Panama-Professional paper 244/cws00058 ID. Cole, W.S. 58 Eocene and Oligocene Lepidocyclina: Foraminifera from the Panama Canal Zone and Vicinity, Panama. Plate 15, in U.S.Geological Survey Professional Paper 244. 1952. #1:/Panama-Professional paper 244/cws00059 ID. Cole, W.S. 59 Oligocene Lepidocyclina: Foraminifera from the Panama Canal Zone and Vicinity, Panama. Plate 16, in U.S.Geological Survey Professional Paper 244. 1952. #1:/Panama-Professional paper 244/cws00060 ID. Cole, W.S. 60 Oligocene Lepidocyclina: Foraminifera from the Panama Canal Zone and Vicinity, Panama. Plate 17, in U.S.Geological Survey Professional Paper 244. 1952. #1:/Panama-Professional paper 244/cws00061 ID. Cole, W.S. 61 Oligocene Lepidocyclina: Foraminifera from the Panama Canal Zone and Vicinity, Panama. Plate 18, in U.S.Geological Survey Professional Paper 244. 1952. #1:/Panama-Professional paper 244/cws00062 ID. Cole, W.S. 62 Oligocene Lepidocyclina: Foraminifera from the Panama Canal Zone and Vicinity, Panama. Plate 19, in U.S.Geological Survey Professional Paper 244. 1952. #1:/Panama-Professional paper 244/cws00063 ID. Cole, W.S. 63 Eocene and Oligocene Lepidocyclina and Eocene Heliolepidina:: Foraminifera from the Panama Canal Zone and Vicinity, Panama. Plate 20, in U.S.Geological Survey Professional Paper 244. 1952. #1:/Panama-Professional paper 244/cws00064 ID. Cole, W.S. 64 Oligocene Lepidocyclina: Foraminifera from the Panama Canal Zone and Vicinity, Panama. Plate 21, in U.S.Geological Survey Professional Paper 244. 1952. #1:/Panama-Professional paper 244/cws00065 ID. Cole, W.S. 65 Oligocene Lepidocyclina: Foraminifera from the Panama Canal Zone and Vicinity, Panama. Plate 22, in U.S.Geological Survey Professional Paper 244. 1952. #1:/Panama-Professional paper 244/cws00066 ID. Cole, W.S. 66 Eocene and Oligocene Lepidocyclina: Foraminifera from the Panama Canal Zone and Vicinity, Panama. Plate 23, in U.S.Geological Survey Professional Paper 244. 1952. #1:/Panama-Professional paper 244/cws00067 ID. Cole, W.S. 67 Eocene helicolepidina and Oligocene migoypsina: Foraminifera from the Panama Canal Zone and Vicinity, Panama. Plate 24, in U.S.Geological Survey Professional Paper 244. 1952. #1:/Panama-Professional paper 244/cws00068 ID. Cole, W.S. 68 Oligocene migoypsina: Foraminifera from the Panama Canal Zone and Vicinity, Panama. Plate 25, in U.S.Geological Survey Professional Paper 244. 1952. #1:/Panama-Professional paper 244/cws00069 ID. Cole, W.S. 69 Eocene asterocyclina: Foraminifera from the Panama Canal Zone and Vicinity, Panama. Plate 26, in U.S.Geological Survey Professional Paper 244. 1952. #1:/Panama-Professional paper 244/cws00070 ID. Cole, W.S. 70 Eocene asterocyclina: Foraminifera from the Panama Canal Zone and Vicinity, Panama. Plate 27, in U.S.Geological Survey Professional Paper 244. 1952. #1:/Panama-Professional paper 244/cws00071 ID. Cole, W.S. 71 Eocene asterocyclina and pseudophragmina: Foraminifera from the Panama Canal Zone and Vicinity, Panama. Plate 28, in U.S.Geological Survey Professional Paper 244. 1952. #1:/Colorado-Professional paper 246/lts00354 ID. Lovering, T.S. 354 Northwestward across Nederland, showing erosion surfaces; the Flattop, Cheyenne Mountain and Overland Mountain surfaces can be seen. Boulder County, Colorado. 1930. Figure 21, in U.S. Geological Survey. Professional paper 245. 1953. #1:/Colorado-Professional paper 246/lts00363 ID. Lovering, T.S. 363 A barren portion of the Tungsten vein, tungsten district, photograph taken a short distance north of the main ore shoot in the Tungsten (Chance) mine. Boulder County, Colorado. Circa 1930. Figure 54, in U.S.Geological Survey Professional Paper 245. 1953. #1:/Colorado-Professional paper 246/lts00370 ID. Lovering, T.S. 370 Vein of high-grade tungsten ore, fourth level of the Cold Spring mine, the ore is wider than the average of the vein. The black material assays 40 to 60 percent WO3. Boulder County, Colorado. Circa 1930. Figure 53, in U.S.Geological Survey Professional Paper 245. 1953. #1:/Colorado-Professional paper 246/lts00376 ID. Lovering, T.S. 376 Altered wall rock adjacent to the Cold Spring vein, fifth level of the Cold Spring mine. The inner edge of the sericitized casing is at the edge of the vein, at the point of the hammer and the outer edge is about 2 inches to the right of the end of the hammer handle. The clay-bearing rock farther to right contrasts decidedly with the fresher-appearing sericitized casing. Boulder County, Colorado. Circa 1930. Figure 55, in U.S.Geological Survey Professional Paper 245. 1953. #1:/Colorado-Professional paper 246/lts00377 ID. Lovering, T.S. 377 A barren silicified portion of the Clyde vein, on the tunnel level. The white seams outlining the fragments in the vuggy opening to the left and above the hammer consist chiefly of beidellite and barite with some dickite. The cavity to the right and above the hammer is a natural vug and contains no ore, though the vein was rich in ferberite less than 20 ft. away. Boulder County, Colorado. Circa 1930. Figure 51, in U.S. Geological Survey. Professional paper 245. 1953. #1:/North Carolina-Professional paper 246/rja00005 ID. Reinemund, J.A. 5 Form a panorama of Gulf fault zone on U.S. Highway 421 at Gulf, exposure on northeast side of road about 1,325 feet south of Norfolk Southern Railroad overpass. Gray and black shale of Cumnock formation cut by four faults with probable displacements of several tens of feet; main Gulf fault is 150 feet to the right of the photograph. Cumnock coal beds crops out 100 feet to the left of the area shown by the photograph and lies beneath the shale in this exposure. Chatham County, North Carolina. 1948. Figure 31, in U.S.Geological Survey Professional Paper 246. 1955. #1:/North Carolina-Professional paper 246/rja00006 ID. Reinemund, J.A. 6 Form a panorama of Gulf fault zone on U.S. Highway 421 at Gulf, exposure on northeast side of road about 1,325 feet south of Norfolk Southern Railroad overpass. Gray and black shale of Cumnock formation cut by four faults with probable displacements of several tens of feet; main Gulf fault is 150 feet to the right of the photograph. Cumnock coal beds crops out 100 feet to the left of the area shown by the photograph and lies beneath the shale in this exposure. Chatham County, North Carolina. 1948. Figure 31, in U.S.Geological Survey Professional Paper 246. 1955. #1:/North Carolina-Professional paper 246/rja00007 ID. Reinemund, J.A. 7 Form a panorama of Gulf fault zone on U.S. Highway 421 at Gulf, exposure on northeast side of road about 1,325 feet south of Norfolk Southern Railroad overpass. Gray and black shale of Cumnock formation cut by four faults with probable displacements of several tens of feet; main Gulf fault is 150 feet to the right of the photograph. Cumnock coal beds crops out 100 feet to the left of the area shown by the photograph and lies beneath the shale in this exposure. Chatham County, North Carolina. 1948. Figure 31, in U.S.Geological Survey Professional Paper 246. 1955. #1:/North Carolina-Professional paper 246/rja00008 ID. Reinemund, J.A. 8 Fanglomerate in Sanford formation 3 miles east of Carthage; exposure on east side of road between Carthage and Cameron, 200 feet from Jonesboro fault; most blocks are fragments of metamorphosed acid volcanic rock. Moore County, North Carolina. Circa 1948. Figure 8, in U.S.Geological Survey Professional Paper 246. 1955. #1:/North Carolina-Professional paper 246/rja00009 ID. Reinemund, J.A. 9 Fanglomerate in Sanford formation, 1 mile west of Corinth; exposure on north side of Norfolk Southern Railroad, 5,000 feet from Jonesboro fault. Large quartzite boulder has 21 inch maximum diameter; matrix is reddish-brown sandstone. Chatham County, North Carolina. Circa 1948. Figure 9, in U.S.Geological Survey Professional Paper 246. 1955. #1:/North Carolina-Professional paper 246/rja00010 ID. Reinemund, J.A. 10 Fanglomerate in Sanford formation, 1 mile west of Corinth; exposure on north side of Norfolk Southern Railroad, 5,000 feet from Jonesboro fault. Rock debris derived from quartzites, granites, non-micaceous acid volcanic rock, micaceous schists and gneisses. Chatham County, North Carolina. Circa 1948. Figure 10, in U.S.Geological Survey Professional Paper 246. 1955. #1:/North Carolina-Professional paper 246/rja00011 ID. Reinemund, J.A. 11 Conglomerate near base of Pekin formation, 1 mile north of Moncure, exposure on east side of county road along Seaboard Railroad, 275 feet above base of Triassic. Pebbles and cobbles are pink and gray tuff fragments; matrix is gray and purple tuff debris. Brunton compass provide scale. Chatham County, North Carolina. Circa 1948. Figure 14, in U.S.Geological Survey Professional Paper 246. 1955. #1:/North Carolina-Professional paper 246/rja00012 ID. Reinemund, J.A. 12 Conglomerate near base of Pekin formation, half mile north of Glendon, exposure at south end of Glendon Bridge. Pre-Triassic slate (lower left) overlain by basal Triassic deposits (upper right) consisting mainly of slate chips; irregular basal Triassic contact is indicated by hammer. Moore County, North Carolina. Circa 1948. Figure 15, in U.S.Geological Survey Professional Paper 246. 1955. #1:/North Carolina-Professional paper 246/rja00013 ID. Reinemund, J.A. 13 Conglomerate near base of Pekin formation, 1 mile southeast of Parkwood [Hallison], exposure on east side of State Highway 22; 100 feet above base of Triassic. Lens of gray quartz-cemented conglomerate ("millstone grit") surrounded by brown, or purple, uncemented arkosic sandstone and conglomerate. Moore County, North Carolina. Circa 1948. Figure 16, in U.S.Geological Survey Professional Paper 246. 1955. #1:/North Carolina-Professional paper 246/rja00014 ID. Reinemund, J.A. 14 Photomicrograph of schist-arenite from Sanford formation one half mile east of Gulf: Thin section of specimen, enlarged 60 times. Non-polarized light. Q, quartz; M muscovite; B biotite; O olivine; I ilmenite; T titanite. Chatham County, North Carolina. 1949. Figure 17, in U.S.Geological Survey Professional Paper 246. 1955. #1:/North Carolina-Professional paper 246/rja00015 ID. Reinemund, J.A. 15 Photomicrograph of schist-arenite from Sanford formation one mile north of Chatham: Thin section of specimen; enlarged 60 times; non-polarized light. F feldspar; Qsm quartz-magnetite-sercicite schist; Qz quartzite; M muscovite; Ma magnetite; O olivine; I ilmenite. Lee County, North Carolina. 1949. Figure 18, in U.S.Geological Survey Professional Paper 246. 1955. #1:/North Carolina-Professional paper 246/rja00016 ID. Reinemund, J.A. 16 Specimen of arkosic sandstone from Sanford formation, conglomeratic schist-arenite resting on reddish-brown claystone, with typical irregular contact; core from drill hole BMDH DR-1, diameter 4 inches. Chatham County, North Carolina. 1949. Figure 19- A, in U.S.Geological Survey Professional Paper 246. 1955. #1:/North Carolina-Professional paper 246/rja00017 ID. Reinemund, J.A. 17 Specimen of blackband from Cumnock formation, blackband resting on coal in lower bench of Cumnock coal bed; note shiny coal blebs in blackband and white calcite fracture coatings from Carolina mine. Chatham County, North Carolina. 1949. Figure 19- B, in U.S.Geological Survey Professional Paper 246. 1955. #1:/North Carolina-Professional paper 246/rja00018 ID. Reinemund, J.A. 18 Specimen of shale from Sanford formation, graded bedding with alternation of reddish- brown clay (dark) and brownish-gray silt (light); core from drill hole BMDH DR-2, diameter 4 inches. Chatham County, North Carolina. 1949. Figure 19-C, in U.S.Geological Survey Professional Paper 246. 1955. #1:/North Carolina-Professional paper 246/rja00019 ID. Reinemund, J.A. 19 Specimen of shale from Sanford formation, impressions on clay bedding surface from specimen shown in photo 18; marks probably are partly of organic and partly of inorganic origin. Chatham County, North Carolina. 1949. Figure 19-D, in U.S.Geological Survey Professional Paper 246. 1955. #1:/North Carolina-Professional paper 246/rja00020 ID. Reinemund, J.A. 20 Diabase dike in Sanford formation 1 mile north of Sanford; contact of diabase (light) with siltstone (dark) is indicated by hammer. Dike is about 30 feet wide, trends perpendicular to plane of photograph; Exposure on county road 1,200 feet west of Buffalo Church. Lee County, North Carolina. Circa 1948. Figure 21, in U.S.Geological Survey Professional Paper 246. 1955. #1:/North Carolina-Professional paper 246/rja00021 ID. Reinemund, J.A. 21 Diabase dike in Pekin formation 7 miles northeast of Sanford, contact of diabase (light) with claystone (dark) is unusually irregular. Note sinuous dike 3 inches wide to the left of the hammer; exposure on county road one-fourth of mile north of Rosser. Lee County, North Carolina. Circa 1948. Figure 22, in U.S.Geological Survey Professional Paper 246. 1955. #1:/North Carolina-Professional paper 246/rja00022 ID. Reinemund, J.A. 22 Diabase dike in Sanford formation 6 miles northeast of Sanford; beds of conglomerate and sandstone are tilted upward on sides of dike (center). Camera faces eastward. Dike trends southeastward, oblique to photograph and is 4 to 6 feet wide. Beds are downthrown 4 feet on northeast side of dike, exposure along Seaboard Railroad, and 1 mile north of Osgood. Lee County, North Carolina. Circa 1948. Figure 23, in U.S.Geological Survey Professional Paper 246. 1955. #1:/North Carolina-Professional paper 246/rja00023 ID. Reinemund, J.A. 23 Post-Triassic deposits overlying pre-Triassic rocks 2 miles south of Sanford. Post- Triassic deposits (light) are unconsolidated arkosic sands; pre-Triassic rocks (dark) are weathered schist. Irregular contact is offset several inches by a fault in center of cut, exposure on Seaboard Railroad near State Highway 78. Lee County, North Carolina. Circa 1948. Figure 25, in U.S.Geological Survey Professional Paper 246. 1955. #1:/North Carolina-Professional paper 246/rja00024 ID. Reinemund, J.A. 24 Post-Triassic deposits 2 miles east of Carthage, part of gravel deposit that extends west of Carthage. Pebbles are mostly white or gray quartz; matrix is coarse-grained, reddish brown arkosic sand, exposure along U.S. Highway 15. Moore County, North Carolina. Circa 1948. Figure 27, in U.S.Geological Survey Professional Paper 246. 1955. #1:/North Carolina-Professional paper 246/rja00025 ID. Reinemund, J.A. 25 Jonesboro fault on highway from Carthage to Cameron, 3 miles east of Carthage, view looking southeast; dark colored Triassic rocks in foreground faulted against light colored pre-Triassic rocks in background; fault is near center of photograph. Post-Triassic deposits cap hill in background. Moore County, North Carolina. Circa 1948. Figure 29, in U.S.Geological Survey Professional Paper 246. 1955. #1:/North Carolina-Professional paper 246/rja00026 ID. Reinemund, J.A. 26 Close-up Jonesboro fault exposure 3 miles east of Carthage, same exposure as photo 25; Triassic fanglomerate in Sanford formation (dark-colored) faulted against pre-Triassic talcose or pyrophylliltic schist (light colored). Fault trends oblique to plane of photograph, dips about 65 degrees to the left (southwest). Moore County, North Carolina. Circa 1948. Figure 30, in U.S.Geological Survey Professional Paper 246. 1955. #1:/North Carolina-Professional paper 246/rja00027 ID. Reinemund, J.A. 27 Cleats in the main bench of the Cumnock coal bed. Exposure in main slope of Caroline mine, 900 feet from portal. Coal is 38 inches thick. Bottom 3 inches of bench are bony and have fewer cleats. Coal is overlain by silty shale and underlain by blackband. Chatham County, North Carolina. 1948. Figure 33, in U.S.Geological Survey Professional Paper 246. 1955. #1:/North Carolina-Professional paper 248/jrh00001 ID. Jahns, R.H. 1 Contorted sills and discordant stringers of medium-grained granite and fine-grained pegmatite (white) in fine- to medium-grained granite (dark gray) main open-cut of the Short Tom Smith mine, the host granite also contains an earlier set of contorted granite sills (light gray) Rockingham County, North Carolina. Circa 1943. Figure 2, in U.S.Geological Survey Professional Paper 248. 1953. #1:/North Carolina-Professional paper 248/jrh00002 ID. Jahns, R.H. 2 Irregular contacts between pegmatite and granite, main open-cut of the E.R. Self mine. Gaston County, North Carolina. Circa 1943. Figure 5, in U.S.Geological Survey Professional Paper 248. 1953. #1:/North Carolina-Professional paper 248/jrh00003 ID. Jahns, R.H. 3 Sinuous discordant apophyis above a bulge in the hanging wall (portal of main incline) Knight mine. Rockingham County, North Carolina. November 1944. Figure 6, in U.S.Geological Survey Professional Paper 248. 1953. #1:/North Carolina-Professional paper 248/jrh00004 ID. Jahns, R.H. 4 Sharp hanging-wall contact in the main east crosscut of the Knight mine. Note the fine- grained border zone and coarse mica books (dark gray to black) in the wall zone. Rockingham County, North Carolina. circa 1943. Figure 7, in U.S.Geological Survey Professional Paper 248. 1953. #1:/North Carolina-Professional paper 248/jrh00005 ID. Jahns, R.H. 5 Foliated and layered sill of granite (upper light layer) underlain by schist (dark layer), Hawkins mine, the schist is underlain first by layered granite, then by mica bearing pegmatite. Stokes County, North Carolina. circa 1943. Figure 8, in U.S.Geological Survey Professional Paper 248. 1953. #1:/North Carolina-Professional paper 248/jrh00006 ID. Jahns, R.H. 6 The same granite sill shown in photo 5: cut by mica-bearing pegmatite (below an to the left). Stokes County, North Carolina. circa 1943. Figure 9, in U.S.Geological Survey Professional Paper 248. 1953. #1:/Georgia-Professional paper 248/jrh00007 ID. Jahns, R.H. 7 Small hexagonal and rhombic muscovite books from the Mitchell Creek pegmatite, note the inclusions of quartz and apatite. Upson County, Georgia. circa 1943. Figure 26, in U.S.Geological Survey Professional Paper 248. 1953. #1:/United States-Professional paper 248/jrh00008 ID. Jahns, R.H. 8 "A" structure in large cleavage sheets of muscovite. Typical flat A sheet below; color zoning shows a left edge of sheet above. Southeastern United States. Figure 28, in U.S.Geological Survey Professional Paper 248. 1953. #1:/United States-Professional paper 248/jrh00009 ID. Jahns, R.H. 9 Typical "A" books of muscovite. Southeastern United States. Figure 29, in U.S.Geological Survey Professional Paper 248. 1953. #1:/United States-Professional paper 248/jrh00010 ID. Jahns, R.H. 10 Side view of same muscovite books as in photograph 9, showing wedge structure. Southeastern United States. Figure 30, in U.S.Geological Survey Professional Paper 248. 1953. #1:North Carolina-Professional paper 248/jrh00012 ID. Jahns, R.H. 12 Ruled mica book in kaolinized pegmatite, Big Bess mine. Gaston County, North Carolina. Figure 32, in U.S.Geological Survey Professional Paper 248. 1953. #1:/United States-Professional paper 248/jrh00013 ID. Jahns, R.H. 13 Ruling in a thick mica book showing the angular relations of cleavage and ruling planes. Southeastern United States. Figure 33, in U.S.Geological Survey Professional Paper 248. 1953. #1:/United States-Professional paper 248/jrh00015 ID. Jahns, R.H. 15 Muscovite heavily stained with magnetite and hematite specks. Note the clear areas along the edges of the sheet and along the narrow warps and ripples. Southeastern United States. Figure 35, in U.S.Geological Survey Professional Paper 248. 1953. #1:/United States-Professional paper 248/jrh00016 ID. Jahns, R.H. 16 Mica slightly specked with hematite. The areas of air creep along the trimmed edges of the sheet and along the cracks and hair lines are slightly darker than the areas of clear mica. Southeastern United States. Figure 36, in U.S.Geological Survey Professional Paper 248. 1953. #1:/United States-Professional paper 248/jrh00017 ID. Jahns, R.H. 17 Mica with moderately heavy hematite stain. Southeastern United States. Figure 37, in U.S.Geological Survey Professional Paper 248. 1953. #1:/United States-Professional paper 248/jrh00018 ID. Jahns, R.H. 18 Triangular lattice of irregular hematite spots in a very thin sheet of mica. Southeastern United States. Figure 38, in U.S.Geological Survey Professional Paper 248. 1953. #1:/United States-Professional paper 248/jrh00019 ID. Jahns, R.H. 19 Mica with heavy blotches and tiny specks of hematite, note the relatively clear margins. Southeastern United States. Figure 39, in U.S.Geological Survey Professional Paper 248. 1953. #1:North Carolina-Professional paper 248/jrh00020 ID. Jahns, R.H. 20 Radiating group of black tourmaline crystals in a mica book from the Big Bess mine. Gaston County, North Carolina. circa 1943. Figure 40, in U.S.Geological Survey Professional Paper 248. 1953. #1:/United States-Professional paper 248/jrh00021 ID. Jahns, R.H. 21 Small flattened inclusion of garnet in a sheet of mineral-specked mica with abundant pale green inorganic vegetable stain. Note the clear area around the inclusions. Southeastern United States. Figure 41, in U.S.Geological Survey Professional Paper 248. 1953. #1:/Georgia-Professional paper 248/jrh00024 ID. Jahns, R.H. 24 Shaft at the Battery mine, Monroe County, Georgia. Circa 1943. Figure 45, in U.S.Geological Survey Professional Paper 248. 1953. #1:/Virginia-Professional paper 248/jrh00025 ID. Jahns, R.H. 25 Open-cut work in decomposed pegmatite, White Peak, No. 1 mine, view of the main cut, looking west, the left wall is country rock schist, the right wall massive quartz. Powhatan County, Virginia. Circa 1943. Figure 46, in U.S.Geological Survey Professional Paper 248. 1953. #1:/Virginia-Professional paper 248/jrh00026 ID. Jahns, R.H. 26 Large mica books in kaolinized wall zone pegmatite at the White Peak No. 1 mine, Powhatan County, Virginia. Circa 1943. Figure 47, in U.S.Geological Survey Professional Paper 248. 1953. #1:/Georgia-Professional paper 248/jrh00028 ID. Jahns, R.H. 28 Abandoned open-cut in hard unweathered rock, Mitchell Creek mine. Upson County, Georgia. Circa 1943. Figure 49, in U.S.Geological Survey Professional Paper 248. 1953. #1:/Georgia-Professional paper 248/jrh00029 ID. Jahns, R.H. 29 Dragline equipment at work, Culbert mine, Upson County, Georgia. Circa 1943. Figure 50, in U.S.Geological Survey Professional Paper 248. 1953. #1:/North Carolina-Professional paper 248/jrh00030 ID. Jahns, R.H. 30 Large scale power shovel operations, Big Bess mine, the pegmatite lies nearly flat at the level of the shovel and all the material at higher levels is partly decomposed schist with thin pegmatite stringers. Gaston County, North Carolina. Circa 1943. Figure 51, in U.S.Geological Survey Professional Paper 248. 1953. #1:/Virginia-Professional paper 248/lrw00017 ID. Lemke, R.W. 17 Zonal relations in pegmatite, main pit in the Maria mine Amelia County, Virginia; view looking west. Graphics on photo: A, coarse, blocky perthite; B, massive quartz; C, Plagioclase-quartz pegmatite; D, biotite gneiss; E. slumped material. Circa 1945. Figure 54, in U.S.Geological Survey Professional Paper 248. 1953. #1:/Virginia-Professional paper 248/lrw00018 ID. Lemke, R.W. 18 Specimen of muscovite crystals in vugs, Champion pegmatite. Amelia County, Virginia. Circa 1945. Figure 55, in U.S.Geological Survey Professional Paper 248. 1953. #1:/Virginia-Professional paper 248/lrw00019 ID. Lemke, R.W. 19 Specimen of corroded albite crystals, Champion pegmatite. Amelia County, Virginia. Circa 1945. Figure 56, in U.S.Geological Survey Professional Paper 248. 1953. #1:/North Carolina-Professional paper 248/gwr00001 ID. Griffitts, W.R. 1 Pegmatite-wall rock relations, Shelby-Hickory district: Inclusion of quartz-muscovite schist (in front of man) in plagioclase-quartz pegmatite near middle of open-cut Drum mine. Waste choked portal of drift is in mica-rich pegmatite adjacent to contact with schist near right margin of picture. Catawba County, North Carolina. 1944. Figure 86-A, in U.S.Geological Survey Professional Paper 248. 1953. #1:/North Carolina-Professional paper 248/gwr00002 ID. Griffitts, W.R. 2 Pegmatite-wall rock relations, Shelby-Hickory district: northwest end of E.R. Self open- cut, showing irregularity of the pegmatite hanging wall and feldspar metacrysts in the granite country rock. Gaston County, North Carolina. 1944. Figure 86-B, in U.S.Geological Survey Professional Paper 248. 1953. #1:/North Carolina-Professional paper 248/gwr00003 ID. Griffitts, W.R. 3 Distortion and rupture of country rock, Shelby-Hickory district: Drag of schists near granite dike, road cut east of Bowen mine, mica schist (left and right) granite, showing foliation (center). Cleveland County, North Carolina. 1944. Figure 80-A, with sketch and graphics, in U.S.Geological Survey Professional Paper 248. 1953. #1:/North Carolina-Professional paper 248/gwr00004 ID. Griffitts, W.R. 4 Distortion and rupture of country rock, Shelby-Hickory district: Western-type granite above pegmatite dike, showing fracturing and folding of foliation, west end of Archie open cut. p, mica-bearing pegmatite (lower left) g, western type granite showing foliation (center and right). Cleveland County, North Carolina. 1944. Figure 80-B, with sketch and graphics, in U.S.Geological Survey Professional Paper 248. 1953. #1:/North Carolina-Professional paper 248/gwr00005 ID. Griffitts, W.R. 5 Muscovite crystals from a vug from the Foster No. 7 mine, Lincoln County, North Carolina. 1944. Figure 84, in U.S.Geological Survey Professional Paper 248. 1953. #1:/United States-Professional paper 249/irw00080 ID. Imlay, R.W. 80 Cosmoceras and Cadoceras, Callovian (Jurassic) Ammonite from the Western interior of the United States. Plate 8, in U.S.Geological Survey Professional Paper 249. 1953. #1:/United States-Professional paper 249/irw00081 ID. Imlay, R.W. 81 Cadoceras, Callovian (Jurassic) Ammonite from the Western interior of the United States. Plate 10, in U.S.Geological Survey Professional Paper 249. 1953. #1:/United States-Professional paper 249/irw00082 ID. Imlay, R.W. 82 Cosmoceras, Cadoceras, and Kepplerites, Callovian (Jurassic) Ammonite from the Western interior of the United States. Plate 14, in U.S.Geological Survey Professional Paper 249. 1953. #1:/United States-Professional paper 249/irw00083 ID. Imlay, R.W. 83 Kepplerites, Callovian (Jurassic) Ammonite from the Western interior of the United States. Plate 17, in U.S.Geological Survey Professional Paper 249. 1953. #1:/Alaska-Professional paper 249/irw00084 ID. Imlay, R.W. 84 Phylloceras, Callovian (Jurassic) Ammonite from Cook Inlet and Alaska Peninsula. Plate 25, in U.S.Geological Survey Professional Paper 249. 1953. #1:/Alaska-Professional paper 249/irw00085 ID. Imlay, R.W. 85 Phylloceras, and Oppelia, Callovian (Jurassic) Ammonite from Cook Inlet and Alaska Peninsula. Plate 26, in U.S.Geological Survey Professional Paper 249. 1953. #1:/Alaska-Professional paper 249/irw00086 ID. Imlay, R.W. 86 Lilloettia, Callovian (Jurassic) Ammonite from Cook Inlet and Alaska Peninsula. Plate 27, in U.S.Geological Survey Professional Paper 249. 1953. #1:/Alaska-Professional paper 249/irw00087 ID. Imlay, R.W. 87 Lilloettia, and Xenocephalites, Callovian (Jurassic) Ammonite from Cook Inlet and Alaska Peninsula. Plate 28, in U.S.Geological Survey Professional Paper 249. 1953. #1:/Alaska-Professional paper 249/irw00088 ID. Imlay, R.W. 88 Lilloettia, and Xenocephalites, Callovian (Jurassic) Ammonite from Cook Inlet and Alaska Peninsula. Plate 29, in U.S.Geological Survey Professional Paper 249. 1953. #1:/Alaska-Professional paper 249/irw00089 ID. Imlay, R.W. 89 Lilloettia, Callovian (Jurassic) Ammonite from Cook Inlet and Alaska Peninsula. Plate 30, in U.S.Geological Survey Professional Paper 249. 1953. #1:/Alaska-Professional paper 249/irw00090 ID. Imlay, R.W. 90 Kheraiceras, Callovian (Jurassic) Ammonite from Cook Inlet and Alaska Peninsula. Plate 31, in U.S.Geological Survey Professional Paper 249. 1953. #1:/Alaska-Professional paper 249/irw00091 ID. Imlay, R.W. 91 Kheraiceras, Callovian (Jurassic) Ammonite from Cook Inlet and Alaska Peninsula. Plate 32, in U.S.Geological Survey Professional Paper 249. 1953. #1:/Alaska-Professional paper 249/irw00092 ID. Imlay, R.W. 92 Kheraiceras, Callovian (Jurassic) Ammonite from Cook Inlet and Alaska Peninsula. Plate 33, in U.S.Geological Survey Professional Paper 249. 1953. #1:/Alaska-Professional paper 249/irw00093 ID. Imlay, R.W. 93 Cadoceras, Callovian (Jurassic) Ammonite from Cook Inlet and Alaska Peninsula. Plate 34, in U.S.Geological Survey Professional Paper 249. 1953. #1:/Alaska-Professional paper 249/irw00094 ID. Imlay, R.W. 94 Cadoceras, Callovian (Jurassic) Ammonite from Cook Inlet and Alaska Peninsula. Plate 35, in U.S.Geological Survey Professional Paper 249. 1953. #1:/Alaska-Professional paper 249/irw00095 ID. Imlay, R.W. 95 Cadoceras, Callovian (Jurassic) Ammonite from Cook Inlet and Alaska Peninsula. Plate 36, in U.S.Geological Survey Professional Paper 249. 1953. #1:/Alaska-Professional paper 249/irw00096 ID. Imlay, R.W. 96 Cadoceras, Callovian (Jurassic) Ammonite from Cook Inlet and Alaska Peninsula. Plate 37, in U.S.Geological Survey Professional Paper 249. 1953. #1:/Alaska-Professional paper 249/irw00097 ID. Imlay, R.W. 97 Cadoceras, Callovian (Jurassic) Ammonite from Cook Inlet and Alaska Peninsula. Plate 38, in U.S.Geological Survey Professional Paper 249. 1953. #1:/Alaska-Professional paper 249/irw00098 ID. Imlay, R.W. 98 Cadoceras, Callovian (Jurassic) Ammonite from Cook Inlet and Alaska Peninsula. Plate 39, in U.S.Geological Survey Professional Paper 249. 1953. #1:/Alaska-Professional paper 249/irw00099 ID. Imlay, R.W. 99 Cadoceras, Callovian (Jurassic) Ammonite from Cook Inlet and Alaska Peninsula. Plate 40, in U.S.Geological Survey Professional Paper 249. 1953. #1:/Alaska-Professional paper 249/irw00100 ID. Imlay, R.W. 100 Cadoceras, Callovian (Jurassic) Ammonite from Cook Inlet and Alaska Peninsula. Plate 40, in U.S.Geological Survey Professional Paper 249. 1953. #1:/Alaska-Professional paper 249/irw00101 ID. Imlay, R.W. 101 Cadoceras, Callovian (Jurassic) Ammonite from Cook Inlet and Alaska Peninsula. Plate 42, in U.S.Geological Survey Professional Paper 249. 1953. #1:/Alaska-Professional paper 249/irw00102 ID. Imlay, R.W. 102 Cadoceras, Callovian (Jurassic) Ammonite from Cook Inlet and Alaska Peninsula. Plate 43, in U.S.Geological Survey Professional Paper 249. 1953. #1:/Alaska-Professional paper 249/irw00103 ID. Imlay, R.W. 103 Cadoceras, Callovian (Jurassic) Ammonite from Cook Inlet and Alaska Peninsula. Plate 44, in U.S.Geological Survey Professional Paper 249. 1953. #1:/Alaska-Professional paper 249/irw00104 ID. Imlay, R.W. 104 Cadoceras, Callovian (Jurassic) Ammonite from Cook Inlet and Alaska Peninsula. Plate 45, in U.S.Geological Survey Professional Paper 249. 1953. #1:/Alaska-Professional paper 249/irw00105 ID. Imlay, R.W. 105 Cadoceras, Callovian (Jurassic) Ammonite from Cook Inlet and Alaska Peninsula. Plate 46, in U.S.Geological Survey Professional Paper 249. 1953. #1:/Alaska-Professional paper 249/irw00106 ID. Imlay, R.W. 106 Cadoceras, Callovian (Jurassic) Ammonite from Cook Inlet and Alaska Peninsula. Plate 47, in U.S.Geological Survey Professional Paper 249. 1953. #1:/Alaska-Professional paper 249/irw00107 ID. Imlay, R.W. 107 Pseudocadoceras and Kepplerites, Callovian (Jurassic) Ammonite from Cook Inlet and Alaska Peninsula. Plate 48, in U.S.Geological Survey Professional Paper 249. 1953. #1:/Alaska-Professional paper 249/irw00108 ID. Imlay, R.W. 108 Pseudocadoceras, Kepplerites and Cosmoceras, Callovian (Jurassic) Ammonite from Cook Inlet and Alaska Peninsula. Plate 49, in U.S.Geological Survey Professional Paper 249. 1953. #1:/Alaska-Professional paper 249/irw00109 ID. Imlay, R.W. 109 Kepplerites, Callovian (Jurassic) Ammonite from Cook Inlet and Alaska Peninsula. Plate 50, in U.S.Geological Survey Professional Paper 249. 1953. #1:/Alaska-Professional paper 249/irw00110 ID. Imlay, R.W. 110 Kepplerites, Callovian (Jurassic) Ammonite from Cook Inlet and Alaska Peninsula. Plate 51, in U.S.Geological Survey Professional Paper 249. 1953. #1:/Alaska-Professional paper 249/irw00111 ID. Imlay, R.W. 111 Kepplerites, Callovian (Jurassic) Ammonite from Cook Inlet and Alaska Peninsula. Plate 52, in U.S.Geological Survey Professional Paper 249. 1953. #1:/Alaska-Professional paper 249/irw00112 ID. Imlay, R.W. 112 Procerites, Cosmoceras and Gowericeras, Callovian (Jurassic) Ammonite from Cook Inlet and Alaska Peninsula. Plate 53, in U.S.Geological Survey Professional Paper 249. 1953. #1:/Alaska-Professional paper 249/irw00113 ID. Imlay, R.W. 113 Procerites? Callovian (Jurassic) Ammonite from Cook Inlet and Alaska Peninsula. Plate 54, in U.S.Geological Survey Professional Paper 249. 1953. #1:/Alaska-Professional paper 249/irw00114 ID. Imlay, R.W. 114 Reineckeia and Grossouvria, Callovian (Jurassic) Ammonite from Cook Inlet and Alaska Peninsula. Plate 54, in U.S.Geological Survey Professional Paper 249. 1953. #1:/Alaska-Professional paper 251/kgc00004 ID. Kennedy, G.C. 4 Photomicrograph: Apatite and late pyroxene in quartz diorite, graphic mean; Plagioclase, pl; pyroxene, py; quartz, q; apatite, ap. Crossed nicols, Magnetite Cliff Jumbo Basin, Prince of Wales Island, Alaska. 1944. Figure 7, in U.S.Geological Survey Professional Paper 251. 1953. #1:/Alaska-Professional paper 251/kgc00005 ID. Kennedy, G.C. 5 Photomicrograph: Fold in fine-grained quartzite; Graphite flakes are oriented parallel to the axial plane of the fold. Plane light. Jumbo Basin, Prince of Wales Island, Alaska. 1944. Figure 3, in U.S.Geological Survey Professional Paper 251. 1953. #1:/Alaska-Professional paper 251/kgc00006 ID. Kennedy, G.C. 6 Photomicrograph: Coarse Detrital feldspar grains present in typical fine-grained sedimentary beds associated with greenstone schist. Crossed nicols. Jumbo Basin, Prince of Wales Island, Alaska. 1944. Figure 4, in U.S.Geological Survey Professional Paper 251. 1953. #1:/Alaska-Professional paper 251/kgc00007 ID. Kennedy, G.C. 7 Photomicrograph: Residual crystals of plagioclase surrounded by orthoclase, crossed nicols, Magnetite Cliff Jumbo Basin, Prince of Wales Island, Alaska. 1944. Figure 5, in U.S.Geological Survey Professional Paper 251. 1953. #1:/Alaska-Professional paper 251/kgc00008 ID. Kennedy, G.C. 8 Photomicrograph: Plagioclase replaced by late orthoclase, with Carlsbad twin boundary retained in orthoclase. Crossed nicols. Magnetite Cliff Jumbo Basin, Prince of Wales Island, Alaska. 1944. Figure 6, in U.S.Geological Survey Professional Paper 251. 1953. #1:/Alaska-Professional paper 251/kgc00009 ID. Kennedy, G.C. 9 Photomicrograph: Magnetite preferentially replacing diopside in gabbro. Plane light. Jumbo Basin, Prince of Wales Island, Alaska. 1944. Figure 8, in U.S.Geological Survey Professional Paper 251. 1953. #1:/Alaska-Professional paper 251/kgc00010 ID. Kennedy, G.C. 10 Photomicrograph: Knife-edge contact between marble and magnetite; graphics mean: Marble, mr; Magnetite, mg. Crossed nicols. Magnetite Cliff Jumbo Basin, Prince of Wales Island, Alaska. 1944. Figure 9, in U.S.Geological Survey Professional Paper 251. 1953. #1:/Alaska-Professional paper 251/kgc00011 ID. Kennedy, G.C. 11 Photomicrograph: Diopside replaced by garnet; crossed nicols. Magnetite Cliff Jumbo Basin, Prince of Wales Island, Alaska. 1944. Figure 10, in U.S.Geological Survey Professional Paper 251. 1953. #1:/Alaska-Professional paper 251/kgc00012 ID. Kennedy, G.C. 12 Photomicrograph: Typical magnetite ore with fine-grained magnetite (black); replacing diopside, crossed nicols. Magnetite Cliff Jumbo Basin, Prince of Wales Island, Alaska. 1944. Figure 11, in U.S.Geological Survey Professional Paper 251. 1953. #1:/Alaska-Professional paper 251/kgc00013 ID. Kennedy, G.C. 13 Photomicrograph: Coarse-grained magnetite replacing diopside, crossed nicols. Magnetite Cliff Jumbo Basin, Prince of Wales Island, Alaska. 1944. Figure 12, in U.S.Geological Survey Professional Paper 251. 1953. #1:/Alaska-Professional paper 251/kgc00014 ID. Kennedy, G.C. 14 Photomicrograph: Zoned isotropic garnet with included diopside grains. Chalcopyrite (black) is preferentially replacing certain garnet zone. Magnetite Cliff Jumbo Basin, Prince of Wales Island, Alaska. 1944. Figure 13, in U.S.Geological Survey Professional Paper 251. 1953. #1:/Alaska-Professional paper 251/kgc00015 ID. Kennedy, G.C. 15 Photomicrograph: Plagioclase lath broken down to aggregate of many small plagioclase crystals of higher anorthite content, garnet surrounding and replacing feldspar; crossed nicols. Magnetite Cliff Jumbo Basin, Prince of Wales Island, Alaska. 1944. Figure 14, in U.S.Geological Survey Professional Paper 251. 1953. #1:/Alaska-Professional paper 251/kgc00016 ID. Kennedy, G.C. 16 Photomicrograph: Fine-grained garnet (black) replacing orthoclase feldspar; crossed nicols. Magnetite Cliff Jumbo Basin, Prince of Wales Island, Alaska. 1944. Figure 15, in U.S.Geological Survey Professional Paper 251. 1953. #1:/Alaska-Professional paper 251/kgc00017 ID. Kennedy, G.C. 17 Photomicrograph: Altered granodiorite, showing garnet (black) replacing diopside and clinozoisite; crossed nicols. Magnetite Cliff Jumbo Basin, Prince of Wales Island, Alaska. 1944. Figure 16, in U.S.Geological Survey Professional Paper 251. 1953. #1:/Alaska-Professional paper 251/kgc00018 ID. Kennedy, G.C. 18 Photomicrograph: Sericitized feldspar of intrusive rock followed by clinozoisite (lath- shaped twinned crystals), diopside (light crystals), and garnet (black irregular areas); crossed nicols. Magnetite Cliff Jumbo Basin, Prince of Wales Island, Alaska. 1944. Figure 17, in U.S.Geological Survey Professional Paper 251. 1953. #1:/Alaska-Professional paper 251/kgc00019 ID. Kennedy, G.C. 19 Photomicrograph: Residual apatite grains in Skarn formed by replacement of intrusive rock; Apatite, ap. plane light. Magnetite Cliff Jumbo Basin, Prince of Wales Island, Alaska. 1944. Figure 19, in U.S.Geological Survey Professional Paper 251. 1953. #1:/Alaska-Professional paper 251/kgc00020 ID. Kennedy, G.C. 20 Photomicrograph: Diopside rock, showing dual grain size characteristic of diopside formed by replacement of intrusive rock; crossed nicols. Magnetite Cliff Jumbo Basin, Prince of Wales Island, Alaska. 1944. Figure 20, in U.S.Geological Survey Professional Paper 251. 1953. #1:/Alaska-Professional paper 251/kgc00021 ID. Kennedy, G.C. 21 Photomicrograph: Altered dike rock. Scapolite poikilitically includes pyroxene and amphibole (small grains with high relief). Crossed nicols. Magnetite Cliff Jumbo Basin, Prince of Wales Island, Alaska. 1944. Figure 21, in U.S.Geological Survey Professional Paper 251. 1953. #1:/Alaska-Professional paper 251/kgc00022 ID. Kennedy, G.C. 22 Specimen: Bedding planes in marble, preserved by garnet. Jumbo Basin, Prince of Wales Island, Alaska. 1944. Figure 22, in U.S.Geological Survey Professional Paper 251. 1953. #1:/Alaska-Professional paper 251/kgc00023 ID. Kennedy, G.C. 23 Specimen: Magnetite-diopside intergrowths replacing marble, upper magnetite bodies, Jumbo Basin, Prince of Wales Island, Alaska. 1944. Figure 23, in U.S.Geological Survey Professional Paper 251. 1953. #1:/Alaska-Professional paper 251/kgc00025 ID. Kennedy, G.C. 25 Specimen: Uralitized diopside crystal, partially replaced and surrounded by garnet. Jumbo mine, Prince of Wales Island, Alaska. 1944. Figure 25, in U.S.Geological Survey Professional Paper 251. 1953. #1:/Alaska-Professional paper 251/kgc00026 ID. Kennedy, G.C. 26 Specimen: Uralitized diopside crystals, partially replaced and surrounded by garnet. Jumbo mine, Prince of Wales Island, Alaska. 1944. Figure 26, in U.S.Geological Survey Professional Paper 251. 1953. #1:/Alaska-Professional paper 251/kgc00027 ID. Kennedy, G.C. 27 Specimen: Rythmically zoned garnet, Jumbo mine, Prince of Wales Island, Alaska. 1944. Figure 27, in U.S.Geological Survey Professional Paper 251. 1953. #1:/Alaska-Professional paper 251/kgc00028 ID. Kennedy, G.C. 28 Specimen: Zoned garnet with grossularite-rich cores and andradite margins. Jumbo mine, Prince of Wales Island, Alaska. 1944. Figure 28, in U.S.Geological Survey Professional Paper 251. 1953. #1:/Alaska-Professional paper 251/kgc00029 ID. Kennedy, G.C. 29 Photomicrograph: Zoned garnet, showing coarse penetration twinning and line lamellar twinning. . Jumbo mine, Prince of Wales Island, Alaska. 1944. Figure 29, in U.S.Geological Survey Professional Paper 251. 1953. #1:/Alaska-Professional paper 251/kgc00030 ID. Kennedy, G.C. 30 Photomicrograph: Zoned garnets characteristic of Jumbo mine, crossed nicols. Prince of Wales Island, Alaska. 1944. Figure 30, in U.S.Geological Survey Professional Paper 251. 1953. #1:/Alaska-Professional paper 251/kgc00031 ID. Kennedy, G.C. 31 Photomicrograph: Zoned anis tropic garnet replace by epidote, quartz, and calcite. Replacement is preferential along certain zones; graphics mean: Quartz, q; garnet, ga; epidote, ep; calcite, ca. Crossed nicols. Jumbo mine, Prince of Wales Island, Alaska. 1944. Figure 31, in U.S.Geological Survey Professional Paper 251. 1953. #1:/Alaska-Professional paper 251/kgc00032 ID. Kennedy, G.C. 32 Photomicrograph: Replaced gabbro, showing coarsely crystalline scapolite, pseudopoikilitically including diopside; Jumbo mine, Prince of Wales Island, Alaska. 1944. Figure 32, in U.S.Geological Survey Professional Paper 251. 1953. #1:/Alaska-Professional paper 251/kgc00033 ID. Kennedy, G.C. 33 Specimen: Gradation in altered augite monzonite from (right) fresh rock to (center) sericitized and chloritized rock to (left) rock composed of coarsely crystalline epidote and albite, Jumbo mine, Prince of Wales Island, Alaska. 1944. Figure 33, in U.S.Geological Survey Professional Paper 251. 1953. #1:/Alaska-Professional paper 251/kgc00034 ID. Kennedy, G.C. 34 Photomicrograph: Feldspar of augite monzonite replaced by sercicite and epidote; graphics mean: Epidote, ep; sercicite, se. Crossed nicols. Jumbo mine, Prince of Wales Island, Alaska. 1944. Figure 34, in U.S.Geological Survey Professional Paper 251. 1953. #1:/Alaska-Professional paper 251/kgc00035 ID. Kennedy, G.C. 35 Specimen: Porous garnet aggregate characteristic of schist replacement. Jumbo mine, Prince of Wales Island, Alaska. 1944. Figure 35, in U.S.Geological Survey Professional Paper 251. 1953. #1:/Alaska-Professional paper 251/kgc00036 ID. Kennedy, G.C. 36 Specimen: Fluted garnet growth characteristic of walls of vugs in replaced schist. Jumbo Basin, Prince of Wales Island, Alaska. 1944. Figure 36, in U.S.Geological Survey Professional Paper 251. 1953. #1:/Alaska-Professional paper 251/kgc00037 ID. Kennedy, G.C. 37 Specimen: Stalactite-like garnet growths from vugs in replaced schist, showing adularia and pencil-shaped growth. Jumbo Basin, Prince of Wales Island, Alaska. 1944. Figure 37, in U.S.Geological Survey Professional Paper 251. 1953. #1:/Nevada-Professional paper 216/fhg00831 ID. Ferguson, H.G. 831 Hill between Mac and Spearmint Canyons, west front of Pilot Mountains; shows overturned part of Mac thrust and conglomerate along the thrust plane. Crumpled upper limestone of Luning formation forms the upper plate, which is overturned near the Mac thrust. Graphic on photo mean: Dunlap formation: tc thrust conglomerate; dc, conglomerate; ds, sandstone. Sunrise formation, s. Luning formation : lu, upper limestone; ls slate; ll lower limestone. Excelsior formation: eg , greenstone. Photograph by Eliot Blackwelder. Mineral County, Nevada. 1937. Plate 6-D, in U.S.Geological Survey Professional Paper 216. 1949. #1:/Nevada-Professional paper 216/fhg00871 ID. Ferguson, H.G. 871 Corrugations in Mac thrust at bend, upper part of Mac Canyon. Graphics mean: Luning formation lu, upper limestone. Sunrise formation s. Mineral County, Nevada. 1937. Plate 9-A, in U.S.Geological Survey Professional Paper 216. 1949. #1:/Nevada-Professional paper 216/fhg01003 ID. Ferguson, H.G. 1003 Upper part of Mac Canyon showing bend in Mac thrust, the Dunlap Canyon thrust (left) here overlaps the Spearmint thrust. Mineral County, Nevada. 1937. Plate 6-C, in U.S.Geological Survey Professional Paper 216. 1949. #1:/Nevada-Professional paper 216/fhg01005 ID. Ferguson, H.G. 1005 "Thrust conglomerate" in fissures in dolomite of overturned upper plate of Mac thrust; ridge south of Mac Canyon, Pilot Mountains. Mineral County, Nevada. 1937. Plate 9- B, in U.S.Geological Survey Professional Paper 216. 1949. #1:/Nevada-Professional paper 216/fhg01029 ID. Ferguson, H.G. 1029 Brecciated dolomite in upper unit of Luning formations between Mac and Spearmint thrusts; north wall of Mac Canyon, Pilot Mountains, the dolomite crops out in a prominent band (center of photograph) and is bounded by the Mac thrust below and the Spearmint thrust above. Limestone (extreme left) and slate of Sunrise formation below the Mac thrust; greenstone of Excelsior formation above the Spearmint thrust. Mineral County, Nevada. 1937. Plate 9-C, in U.S.Geological Survey Professional Paper 216. 1949. #1:/Nevada-Professional paper 216/fhg01033 ID. Ferguson, H.G. 1033 Intricately contorted sandstone of Dunlap formation below Spearmint thrust, Mac Canyon, Pilot Mountains. Mineral County, Nevada. 1937. Plate 10-A, in U.S.Geological Survey Professional Paper 216. 1949. #1:/Nevada-Professional paper 216/fhg01053 ID. Ferguson, H.G. 1053 Interbedded chert with tuffaceous slate and sandstone in Excelsior formation: south flank of Pilot Mountains. Mineral County, Nevada. 1937. Plate 6-B, in U.S.Geological Survey Professional Paper 216. 1949. #1:/Nevada-Professional paper 216/fhg01073 ID. Ferguson, H.G. 1073 "Thrust conglomerate" on ridge south of Sunrise Flat, Gabbs Valley Range, show close packing of pebbles and lack of stretching and shearing. Mineral County, Nevada. 1937. Plate 6-A, in U.S.Geological Survey Professional Paper 216. 1949. #1:/Nevada-Professional paper 216/fhg01040 ID. Ferguson, H.G. 1040 Limestone conglomerate of Dunlap formation (right) unconformable on limestone of Luning formation; Garfield Hills, ridge 4 miles east of Garfield Peak. Mineral County, Nevada. 1937. Plate 4-A, in U.S.Geological Survey Professional Paper 258. 1956. #1:/Nevada-Professional paper 216/fhg01041 ID. Ferguson, H.G. 1041 Coarse fanglomerate of limestone boulders in Dunlap formation, overlying limestone member of Luning formation: northeast side of klippe of Marble Quarry, southwestern Garfield Hills. Mineral County, Nevada. 1937. Plate 4-B, in U.S.Geological Survey Professional Paper 258. 1956. #1:/Nevada-Professional paper 216/fhg01042 ID. Ferguson, H.G. 1042 Basal conglomerate of Dunlap formation, resting on slate member of Luning formation: southwest side of klippe of Marble Quarry thrust, southeastern Garfield Hills. Mineral County, Nevada. 1937. Plate 4-C, in U.S.Geological Survey Professional Paper 258. 1956. #1:/Nevada-Professional paper 216/fhg01043 ID. Ferguson, H.G. 1043 West front of Gabbs Valley range shows Volcano Peak and mouth of New York Canyon. Photograph by Eliot Blackwelder. Mineral County, Nevada. 1937. Plate 4-D, in U.S.Geological Survey Professional Paper 216. 1949. #1:/Nevada-Professional paper 216/fhg01044 ID. Ferguson, H.G. 1044 North of Mac Canyon, Pilot Mountains, showing involute fold, overturned slate members of Luning formation above upper limestone, at left. Mineral County, Nevada. 1937. Plate 10-B, in U.S.Geological Survey Professional Paper 216. 1949. #1:/Nevada-Professional paper 216/fhg01045 ID. Ferguson, H.G. 1045 Shoshone thrust: Massive dolomite of Luning formation (left, prominent outcrops) thrust over thin-bedded limestone of Sunrise formation (right). Shows "spike: of dolomite along thrust plane; south wall of Milton Canyon, Shoshone Mountains. Nye County, Nevada. 1937. Plate 10-C, in U.S.Geological Survey Professional Paper 216. 1949. #1:/Nevada-Professional paper 216/fhg01046 ID. Ferguson, H.G. 1046 Shoshone thrust; nearer view of "spike" of dolomite of Luning formation on thrust plane. Truck in canyon (lower right) gives scale, south wall of Milton Canyon, Shoshone Mountains. Nye County, Nevada. 1937. Plate 10-D, in U.S.Geological Survey Professional Paper 216. 1949. #1:/Saipan Island-Professional paper 253/cws00107 ID. Cole, W.S. 107 Heterostegina and camerina. Saipan Island, Micronesia. 1946. Plate 2, in U.S.Geological Survey Professional Paper 253. 1953. #1:/Saipan Island-Professional paper 253/cws00108 ID. Cole, W.S. 108 Spiroclypeus. Saipan Island, Micronesia. 1946. Plate 3, in U.S.Geological Survey Professional Paper 253. 1953. #1:/Saipan Island-Professional paper 253/cws00109 ID. Cole, W.S. 109 Spiroclypeus operculina and heterostegina Saipan Island, Micronesia. 1946. Plate 4, in U.S.Geological Survey Professional Paper 253. 1953. #1:/Saipan Island-Professional paper 253/cws00110 ID. Cole, W.S. 110 Operculina, streblus, spiroclypeus and cycloclypeus. Saipan Island, Micronesia. 1946. Plate 5, in U.S.Geological Survey Professional Paper 253. 1953. #1:/Saipan Island-Professional paper 253/cws00111 ID. Cole, W.S. 111 Pellatispira and biplanispira. Saipan Island, Micronesia. 1946. Plate 6, in U.S.Geological Survey Professional Paper 253. 1953. #1:/Saipan Island-Professional paper 253/cws00112 ID. Cole, W.S. 112 Lepidocyclina and spiroclypeus. Saipan Island, Micronesia. 1946. Plate 7, in U.S.Geological Survey Professional Paper 253. 1953. #1:/Saipan Island-Professional paper 253/cws00113 ID. Cole, W.S. 113 Lepidocyclina, spiroclypeus and miogypsinoides. Saipan Island, Micronesia. 1946. Plate 8, in U.S.Geological Survey Professional Paper 253. 1953. #1:/Saipan Island-Professional paper 253/cws00114 ID. Cole, W.S. 114 Lepidocyclina. Saipan Island, Micronesia. 1946. Plate 9, in U.S.Geological Survey Professional Paper 253. 1953. #1:/Saipan Island-Professional paper 253/cws00115 ID. Cole, W.S. 115 Lepidocyclina. Saipan Island, Micronesia. 1946. Plate 10, in U.S.Geological Survey Professional Paper 253. 1953. #1:/Saipan Island-Professional paper 253/cws00116 ID. Cole, W.S. 116 Lepidocyclina. Saipan Island, Micronesia. 1946. Plate 11, in U.S.Geological Survey Professional Paper 253. 1953. #1:/Saipan Island-Professional paper 253/cws00117 ID. Cole, W.S. 117 Asterictclina, discocylcina, lepidocyclina sorities and borelis. Saipan Island, Micronesia. 1946. Plate 12, in U.S.Geological Survey Professional Paper 253. 1953. #1:/Saipan Island-Professional paper 253/cws00118 ID. Cole, W.S. 118 Miogypsinoides, miogygpsina and borelis. Saipan Island, Micronesia. 1946. Plate 13, in U.S.Geological Survey Professional Paper 253. 1953. #1:/Saipan Island-Professional paper 253/cws00119 ID. Cole, W.S. 119 Sorites, lepidocyclina, victoriella, cycloclypeus, spiroclypeus, miogypsinoides, miogypsina, and austrotrillina. Saipan Island, Micronesia. 1946. Plate 14, in U.S.Geological Survey Professional Paper 253. 1953. #1:/Saipan Island-Professional paper 253/cws00120 ID. Cole, W.S. 120 Fabiana, pellatispira, and asterocyclina. Saipan Island, Micronesia. 1946. Plate 15, in U.S.Geological Survey Professional Paper 253. 1953. #1:/Texas-Professional paper 254/bol00001 ID. Bandy, O.L. 1 Recent foraminifera, Gulf of Mexico, coast of Louisiana and Texas. Plate 28, in U.S.Geological Survey Professional Paper 254. 1954. #1:/Texas-Professional paper 254/bol00002 ID. Bandy, O.L. 2 Recent foraminifera, Gulf of Mexico, coast of Louisiana and Texas. Plate 29, in U.S.Geological Survey Professional Paper 254. 1954. #1:/Texas-Professional paper 254/bol00003 ID. Bandy, O.L. 3 Recent foraminifera, Gulf of Mexico, coast of Louisiana and Texas. Plate 30, in U.S.Geological Survey Professional Paper 254. 1954. #1:/Texas-Professional paper 254/bol00004 ID. Bandy, O.L. 4 Recent foraminifera, Gulf of Mexico, coast of Louisiana and Texas. Plate 31, in U.S.Geological Survey Professional Paper 254. 1954. #1:/United States-Professional paper 254/fsk00001 ID. Fox, S.K. 1 Reophacide, lituolidae, textulariidae, verneuilindae, and trochamminidae, from the Western Interior of the United States. Plate 24, in U.S.Geological Survey Professional Paper 254. 1954. #1:/United States-Professional paper 254/fsk00002 ID. Fox, S.K. 2 Placopsilinidae and lagenide, from the Western Interior of the United States. Plate 25, in U.S.Geological Survey Professional Paper 254. 1954. #1:/United States-Professional paper 254/fsk00003 ID. Fox, S.K. 3 Lagenide, bulimindae, rotaliidae and anomalinidae, from the Western Interior of the United States. Plate 26, in U.S.Geological Survey Professional Paper 254. 1954. #1:/Kansas-Professional paper 254/mash0005 ID. Mamay, S.H. 5 Sclerocelyphus oviformus Mamay, N. Gen. N.sp. Kansas. Plate 21, in U.S.Geological Survey Professional Paper 254. 1954. #1:/Kansas-Professional paper 254/mash0006 ID. Mamay, S.H. 6 Tyliosperma Orbiculatum Mamay, N. Gen. N.sp. Kansas. Plate 22, in U.S.Geological Survey Professional Paper 254. 1954. #1:/Kansas-Professional paper 254/mash0007 ID. Mamay, S.H. 7 Tyliosperma Orbiculatum Mamay, N. Gen. N.sp. Kansas. Plate 23, in U.S.Geological Survey Professional Paper 254. 1954. #1:/New York-Professional paper 254/weil0001 ID. Weiss, L. 1 Nonionidae Foraminifera, Long Island, New York. Plate 32, in U.S.Geological Survey Professional Paper 254. 1954. #1:/New York-Professional paper 254/weil0002 ID. Weiss, L. 2 Rotaliidae, globigerinidae, buliminidae, moilidae and polymorphinidae. Long Island, New York. Plate 33, in U.S.Geological Survey Professional Paper 254. 1954. #1:/Utah-Professional paper 257/bhj00001 ID. Bissell, H.J. 1 Aerial view south of Salem showing pre-Lake Bonneville alluvial fan at the foot of the Wasatch Mountains cut by shoreline terraces of Lake Bonneville. Utah County, Utah. Circa 1940. Figure 24, in U.S.Geological Survey Professional Paper 257. 1963. #1:/Utah-Professional paper 257/bhj00002 ID. Bissell, H.J. 2 Details of bedding in the silt members of the Alpine formation, showing layers of fine sand, silt and clay, north side of the mouth of Slate Canyon. Ruler is 6 inches long. Utah County, Utah. Circa 1940. Figure 25, in U.S.Geological Survey Professional Paper 257. 1963. #1:/Utah-Professional paper 257/bhj00003 ID. Bissell, H.J. 3 Finely laminated varve-like silt and clay in the Alpine formation. North of Maple Canyon in central part of sec. 12, T. 8 S., R. 3 E. Sanpete County, Utah. Circa 1940. Figure 26, in U.S.Geological Survey Professional Paper 257. 1963. #1:/Utah-Professional paper 257/bhj00004 ID. Bissell, H.J. 4 Gravel of the Bonneville formation resting disconformably upon silt of the Alpine formation: Excavation in a bay bar south of Salem. Utah County, Utah. Circa 1940. Figure 27, in U.S.Geological Survey Professional Paper 257. 1963. #1:/Utah-Professional paper 257/bhj00005 ID. Bissell, H.J. 5 Disconformity (just below pick head) between the Alpine and Bonneville formations; east of Springville. Utah County, Utah. Circa 1940. Figure 29, in U.S.Geological Survey Professional Paper 257. 1963. #1:/Utah-Professional paper 257/bhj00006 ID. Bissell, H.J. 6 Details of sorting in gravel of the Provo formation east of Springville. Utah County, Utah. Circa 1940. Figure 31, in U.S.Geological Survey Professional Paper 257. 1963. #1:/Utah-Professional paper 257/bhj00007 ID. Bissell, H.J. 7 Sub mature post-Provo, pre-Utah lake soil, developed on deltaic gravel of the Provo formation. B indicates the B-horizon of the soil; Cca, the Cca horizon; and Co, younger colluvium overlying the soil. Thorn gravel pits west of the mouth of Slate Canyon. Utah County, Utah. Circa 1940. Figure 32, in U.S.Geological Survey Professional Paper 257. 1963. #1:/Utah-Professional paper 257/bhj00008 ID. Bissell, H.J. 8 Delta deposit of the Provo formation showing top set beds of gravel truncating fore set beds of gravel and sand. Road cut exposures; pick is 18 inches long. Brigham Young University campus, Provo. Utah County, Utah. Circa 1940. Figure 33, in U.S.Geological Survey Professional Paper 257. 1963. #1:/Utah-Professional paper 257/bhj00009 ID. Bissell, H.J. 9 Deltaic silt and fine sand in the silt member of the Provo formation in a gully about 1 miles west of Mapleton. Utah County, Utah. Circa 1940. Figure 35, in U.S.Geological Survey Professional Paper 257. 1963. #1:/Utah-Professional paper 257/bhj00010 ID. Bissell, H.J. 10 Fore set beds of an embankment deposit of gravel of the Provo formation, southeast of Payson, overlain by the diatomaceous unit of the silt member; arrows indicate base of silt member. Utah County, Utah. Circa 1940. Figure 36, in U.S.Geological Survey Professional Paper 257. 1963. #1:/Utah-Professional paper 257/bhj00011 ID. Bissell, H.J. 11 Tufa in Utah Lake deposits enclosing mollusk shells: Shore of Utah Lake at Lincoln Beach. Utah County, Utah. Circa 1940. Figure 37, in U.S.Geological Survey Professional Paper 257. 1963. #1:/Utah-Professional paper 257/wjs00041 ID. Williams, J.S. 41 Embankments of gravel of the Alpine and Bonneville formations, oblique aerial view to northwest from Wellsville; Wellsville Mountain at left; graphics on photo mean: Qab, Alpine and Bonneville formations, undifferentiated; Qbb, Bonneville formation; Qpb, Provo formations; Qlm, landslide; Qlw post-Lake Bonneville slope wash. Photograph by Bert Allen. Cache County, Utah. Circa 1947. Figure 40, in U.S.Geological Survey Professional Paper 257. 1963. #1:/Utah-Professional paper 257/wjs00042 ID. Williams, J.S. 42 Eroded embankment of silt and fine sand of the Alpine and Bonneville formations; oblique aerial view southeast from 1 mile southwest of Hyrum showing Provo delta of Blacksmith Fork and Little Bear River in foreground. Photograph by Bert Allen. Cache County, Utah. Circa 1947. Figure 41, in U.S.Geological Survey Professional Paper 257. 1963. #1:/Utah-Professional paper 257/wjs00043 ID. Williams, J.S. 43 Sterling bar of gravel and sand of the Provo formation, in upper left are eroded embankments of silt and fine sand of the Alpine and Bonneville formations; oblique aerial view is to southwest from Hyrum Reservoir. Photograph by Bert Allen. Cache County, Utah. Circa 1947. Figure 42, in U.S.Geological Survey Professional Paper 257. 1963. #1:/Colorado-Professional paper 258/ccw00205 ID. Cross, C.W. 205 San Juan tuff and Telluride conglomerate in the mountains north of the San Miguel River, as seen from east of Mill Creek. Campbell Peak is near the center, Iron Mountain on the left and the high ridge that leads to Dallas Peak on the right. The light colored cliffs are outcrops of the Telluride conglomerate; above them the closely bedded San Juan tuffs and the tops of the mountains are underlain by well-bedded Treasure Mountain rhyolite. San Miguel County, Colorado. 1895. Figure 10, in U.S.Geological Survey Professional Paper 258. 1956. Figure 1 in U.S.Geological Survey Folio 57, 1899. #1:/Colorado-Professional paper 258/ccw00236 ID. Cross, C.W. 236 Vermillion Peak, looking south from knob at the head of Groundhog Gulch, in the southeastern part of the Telluride quadrangle. Characteristic cliffs of San Juan tuff are capped by a flow of Treasure Mountain rhyolite. San Miguel County, Colorado. 1895. Figure 7, in U.S.Geological Survey Professional Paper 258. 1956. Figure 15, #1:/Colorado-Professional paper 258/ccw00386 ID. Cross, C.W. 386 Northwest from Molar Lake in the Silverton quadrangle showing the mountains south west of Grand Turk. The upper cliffs are San Juan tuff underlain by a thin layer of Telluride conglomerate; the lower steep slopes are of the Cutler formation and below that are Hermosa formation. Photograph by E. Howe. San Juan County, Colorado. August 1898. Figure 8, in U.S.Geological Survey Professional Paper 258. 1956. #1:/Colorado-Professional paper 258/ccw00442 ID. Cross, C.W. 442 Well-layered lavas of the Potosi volcanic series as seen down the valley of the Rio Grande from north of Weminuche meadows, San Cristobal quadrangle. The upper cliff- forming flow is Piedra rhyolite; the lower talus-covered slopes are underlain by Huerto quartz latite and Alboro rhyolite. Hinsdale County, Colorado. October 1899. Frontispiece in U.S.Geological Survey Professional Paper 258. 1956. #1:/Colorado-Professional paper 258/ccw00463 ID. Cross, C.W. 463 A view in the Silverton quadrangle of the mountains southwest of Grand Turk, taken from the shore of a lake on the divide between Lime Creek and the Animas River. The upper cliff is San Juan tuff, under it is Telluride conglomerate, and the lower slopes are of the Cutler and Hermosa formation. San Juan County, Colorado. August 18, 1900. Figure 6, in U.S.Geological Survey Professional Paper 258. 1956. #1:/Colorado-Professional paper 258/ccw00746 ID. Cross, C.W. 746 Sugar Loaf, as seen from the second ridge to the east, is a rhyolite plug cutting the Eureka rhyolite. Lake City quadrangle. Hinsdale County, Colorado. September 26, 1905. Figure 29, in U.S.Geological Survey Professional Paper 258. 1956. #1:/Colorado-Professional paper 258/ccw00756 ID. Cross, C.W. 756 Details of San Juan tuff near the head o the Little Cimmarron Creek the point left of the center is capped by a massive intrusive body. Lake City quadrangle. Hinsdale County, Colorado. October 1906. Figure 9, in U.S.Geological Survey Professional Paper 258. 1956. #1:/Colorado-Professional paper 258/ccw00833 ID. Cross, C.W. 833 Characteristic scarp of the Hermosa formation, looking north from scarp south of Elbert Creek, in the left background is the rhyolite summit of Engineer Mountain; to the right the granite summit of Potato Hill, with roches moutonees surfaces near that hill. San Juan County, Colorado. 1906. Figure 5, in U.S.Geological Survey Professional Paper 258. 1956. #1:/Colorado-Professional paper 258/ccw00859 ID. Cross, C.W. 859 Characteristic weathering of tuff of the Alboroto rhyolite, cliffs are on the east side of Blue Creek near the border of the Lake City quadrangle, Gunnison County, Colorado. 1906. Figure 20, in U.S.Geological Survey Professional Paper 258. 1956. #1:/Colorado-Professional paper 258/ccw00945 ID. Cross, C.W. 945 A regular flow of Piedra rhyolite overlying thick beds of rhyolite tuff at the head of Bennett Creek; northeastern part of the San Cristobal quadrangle, Mineral County, Colorado. August 12, 1908. Figure 25, in U.S.Geological Survey Professional Paper 258. 1956. #1:/Colorado-Professional paper 258/ccw00974 ID. Cross, C.W. 974 Cliffs of Vallecito conglomerate west of Mount Rumlett, as seen looking west from Porter ranch in Pine River Valley, near the west border of Piedra quadrangle, La Plata County, Colorado. August 11, 1909. Figure 3, in U.S.Geological Survey Professional Paper 258. 1956. #1:/Colorado-Professional paper 258/ccw00976 ID. Cross, C.W. 976 Paleozoic rocks exposed on a nearly level bench at the top of cliffs of Vallecito conglomerate, as seen looking west from Porter ranch, in Pine River Valley, Piedra quadrangle, La Plata County, Colorado. September 30, 1909. Figure 4, in U.S.Geological Survey Professional Paper 258. 1956. #1:/Colorado-Professional paper 258/ccw01000 ID. Cross, C.W. 1000 Cliffs facing the Rio Grande west of Lost Trail Creek, as viewed from their southern base. San Juan tuff is at the base, overlain by massive flow(?) of Treasure Mountain rhyolite, and capped by agglomerate from the Carson volcano of Sheep Mountain quartz latite. Hinsdale County, Colorado. September 24, 1909. Figure 15, in U.S.Geological Survey Professional Paper 258. 1956. #1:/Colorado-Professional paper 258/ccw01002 ID. Cross, C.W. 1002 Agglomerate of Sheep Mountain quartz latite of the Carson volcano. The view is to the east from the west side of Lost Trail Creek about half a mile south of the mouth of West Lost Trail Creek in the San Cristobal quadrangle, Hinsdale County, Colorado. September 24, 1909. Figure 16, in U.S.Geological Survey Professional Paper 258. 1956. #1:/Colorado-Professional paper 258/ccw01046 ID. Cross, C.W. 1046 Castellated tuff breccia and arch of the Fisher quartz latite, east of South River near the eastern border of the San Cristobal quadrangle; Mineral County, Colorado. August 10 1911. Figure 28, in U.S.Geological Survey Professional Paper 258. 1956. #1:/Colorado-Professional paper 258/hjf00259 ID. Hunter, J.F. 259 Weathering of tuff of the Alboroto rhyolite along road near Fourmile Creek, Cochetopa quadrangle, Saguache County, Colorado. September 12, 1914. Figure 21, in U.S.Geological Survey Professional Paper 258. 1956. #1:/Colorado-Professional paper 258/hjf00285 ID. Hunter, J.F. 285 Typical outcrops of Piedra rhyolite in West Bellows Creek, as seen from north of benchmark 11,570; the main tuff layer of the Piedra forms the bench above cliff. Creed quadrangle. Mineral County, Colorado. September 1, 1914. Figure 24, in U.S.Geological Survey Professional Paper 258. 1956. #1:/Colorado-Professional paper 258/hjf00307 ID. Hunter, J.F. 307 Outcrops showing layering of Piedra rhyolite in cliffs in West Bellows Creek, as seen from south rim of East Bellows Creek; Creede quadrangle. Mineral County, Colorado. September 8, 1914. Figure 26, in U.S.Geological Survey Professional Paper 258. 1956. #1:/Colorado-Professional paper 258/les00033 ID. Larsen, E.S. 33 Weathering of Sheep Mountain quartz latite tuff breccia of the Carson volcano in the western part of the San Cristobal quadrangle. This view, at an altitude of 12,000 feet on the forks of West Lost Trail Creek, shows a dike, a sill, and a flow in the breccia. Hinsdale County, Colorado. September 8, 1910. Figure 14, in U.S.Geological Survey Professional Paper 258. 1956. #1:/Colorado-Professional paper 258/les00090 ID. Larsen, E.S. 90 The Crookton fault in the northern part of the Cochetopa quadrangle, as seen looking south from a point south of Tomichi Dome, the Morrison formation, forming the ridge, is faulted and upturned against Pre-Cambrian rocks to the left. Gunnison County, Colorado. October 11, 1912. Figure 32, in U.S.Geological Survey Professional Paper 258. 1956. Plate 16, in U.S.Geological Survey Bulletin 843. 1935. #1:/Colorado-Professional paper 258/les00100 ID. Larsen, E.S. 100 Beehive type weathering of Alboroto rhyolite in the basin of Antelope Creek in the western part of Cochetopa quadrangle: Saguache County, Colorado. August 6, 1914. Figure 22, in U.S.Geological Survey Professional Paper 258. 1956. #1:/Colorado-Professional paper 258/les00130 ID. Larsen, E.S. 130 Form a panorama of gently dipping lava flows and tuff beds, as seen looking down San Francisco Creek. Dog Mountain, center is capped by a remnant of latite and basalt of the Hinsdale formation; the upper steep slopes are Piedra rhyolite, the lower ones are Alboroto rhyolite. Conejos quartz latite underlies the flat foreground. The flows dip regularly toward the San Luis Valley. Rio Grande County, Colorado. July 1, 1916. Figure 17, in U.S.Geological Survey Professional Paper 258. 1956. #1:/Colorado-Professional paper 258/les00131 ID. Larsen, E.S. 131 Form a panorama of gently dipping lava flows and tuff beds, as seen looking down San Francisco Creek. Dog Mountain, center is capped by a remnant of latite and basalt of the Hinsdale formation; the upper steep slopes are Piedra rhyolite, the lower ones are Alboroto rhyolite. Conejos quartz latite underlies the flat foreground. The flows dip regularly toward the San Luis Valley. Rio Grande County, Colorado. July 1, 1916. Figure 17, in U.S.Geological Survey Professional Paper 258. 1956. #1:/Colorado-Professional paper 258/les00426 ID. Larsen, E.S. 426 Irregular base of Sheep Mountain quartz latite, looking down Carnero Creek at a gap a few miles above La Garita, Del Norte quadrangle. Saguache County, Colorado. Figure 13, in U.S.Geological Survey Professional Paper 258. 1956. #1:/Colorado-Professional paper 258/les00427 ID. Larsen, E.S. 427 The graben of Clear Creek, San Cristobal quadrangle, as viewed southward from Clear Creek Falls. Bristol Head is in the left background. The gap in which Lake Santa Maria lies is to the right of Bristol Head. Flows of rhyolite dipping west are west of Lake Santa Maria. The lower area is the downthrown block, and the steep slopes on both sides are the bordering masses. Photograph by J.W. Greig. Mineral County, Colorado. Figure 33, in U.S.Geological Survey Professional Paper 258. 1956. #1:/Colorado-Professional paper 254/ytc00001 ID. Yen, Teng-Chien 1 Upper Cretaceous nonmarine mollusks from Wyoming. Plate 17, in U.S.Geological Survey Professional Paper 254. 1954. #1:/Colorado-Professional paper 254/ytc00002 ID. Yen, Teng-Chien 2 Upper Cretaceous nonmarine mollusks from Utah and Colorado. Plate 18, in U.S.Geological Survey Professional Paper 254. 1954. #1:/Colorado-Professional paper 254/ytc00003 ID. Yen, Teng-Chien 3 Upper Cretaceous nonmarine mollusks from Utah and Colorado. Plate 19, in U.S.Geological Survey Professional Paper 254. 1954. #1:/Colorado-Professional paper 233/ytc00004 ID. Yen, Teng-Chien 4 Unio and Vetulonaia. Morrison Formation, Colorado, Utah and Wyoming. Plate 3 in U.S. Geological Survey. Professional paper 233. 1952. #1:/Colorado-Professional paper 233/ytc00005 ID. Yen, Teng-Chien 5 Unio and Hadrodon. Morrison Formation, Colorado, Utah and Wyoming. Plate 4 in U.S. Geological Survey. Professional paper 233. 1952. #1:/Colorado-Professional paper 233/ytc00006 ID. Yen, Teng-Chien 6 Unio and Hadrodon. Morrison Formation, Colorado, Utah and Wyoming. Plate 5 in U.S. Geological Survey. Professional paper 233. 1952. #1:/Colorado-Professional paper 233/ytc00007 ID. Yen, Teng-Chien 7 Gastropoda. Morrison Formation, Colorado, Utah and Wyoming. Plate 6 in U.S. Geological Survey. Professional paper 233. 1952. #1:/New Jersey-Folio 83/dnh00012 ID. Darton, N.H. 12 Upper contact of Palisade diabase in railroad cut east of New Durham, looking north. Shows dike like attitude of the trap at its western exposure, cutting up through the Newark formation. Hudson County, New Jersey. 1902. Figure 13 in U.S. Geological Survey. Folio 83. 1902. #1:/New York-Folio 83/dnh00014 ID. Darton, N.H. 14 The Palisades, from the east of the Hudson, near Yonkers, Westchester County, New York. 1902. Figure 6, a sketch, in U.S. Geological Survey. Folio 83. 1902. #1:/South Dakota-Folio 85/dnh00492 ID. Darton, N.H. 492 Gypsum beds in Spearfish shale, cliff on Cold Brook, near Hot Springs, Fall River County, South Dakota. 1901. Figure 9 in U.S. Geological Survey. Folio 85. 1902. #1:/South Dakota-Folio 85/dnh00622 ID. Darton, N.H. 622 "Hogback" of Dakota sandstone, Buffalo Gap, looking southwest. The surfaces sloping steeply to the left are the bedding surfaces of the upturned Dakota sandstone. Fall River County, South Dakota. 1901. Figure 3 in U.S. Geological Survey. Folio 85. 1902. #1:/Wyoming-Folio 91/dnh00785 ID. Darton, N.H. 785 Old gravel capped river terrace of North Platte River, northeast of Cassa. Terrace is on the Arikaree formation. Hartville formation in the background. Platte County, Wyoming. 1901. Figure 2 in U.S. Geological Survey. Folio 91. 1903. #1:/Pennsylvania-Folio 93/fml00005 ID. Fuller, M.L. 5 Torrent gravel in bed of stream and section of glacial clay showing contortions due to creep. Tioga County, Pennsylvania. 1902. Figure 8 in U.S. Geological Survey. Folio 93. 1903. #1:/Pennsylvania-Folio 93/fml00020 ID. Fuller, M.L. 20 Concretionary masses in the Chemung formation a few miles northeast of the Tioga quadrangle. Tioga County, Pennsylvania. 1902. Figure 9 in U.S. Geological Survey. Folio 93. 1903 #1:/Indiana-Folio 105/fml00031 ID. Fuller, M.L. 31 Characteristic recent erosion topography in till, the illustration also shows a horizontal contact of the light colored loess with the underlying darker till. Indiana. 1903. Figure 8 in U.S. Geological Survey. Folio 105. 1904. #1:/Indiana-Folio 105/fml00033 ID. Fuller, M.L. 33 Characteristic exposure of the Inglefield sandstone near Inglefield station. Vanderburgh County, Indiana. 1903. Figure 6 in U.S. Geological Survey. Folio 105. 1904. #1:/Indiana-Folio 105/fml00035 ID. Fuller, M.L. 35 Shale "dike" in limestone near Evansville; formed by the creeping of the decomposed shale into a solution crevice. The pre-Iowan soil is the dark band beneath the loess at the surface. Vanderburgh County, Indiana. 1903. Figure 7 in U.S. Geological Survey. Folio 105. 1904. #1:/Indiana-Folio 105/fml00036 ID. Fuller, M.L. 36 Stratification in fossiliferous marl-loess near New Harmony. Posey County, Indiana. 1903. Figure 9 in U.S. Geological Survey. Folio 105. 1904. #1:/Indiana-Folio 105/fml00039 ID. Fuller, M.L. 39 Marl-loess terrace of Mumford Hills, from the south. Posey County, Indiana. 1903. Figure 10 in U.S. Geological Survey. Folio 105. 1904. #1:/Indiana-Folio 105/fml00040 ID. Fuller, M.L. 40 Surface of a marl-loess plain south of New Harmony, Posey County, Indiana. 1903. Figure 11 in U.S. Geological Survey. Folio 105. 1904. #1:/Indiana-Folio 105/fml00043 ID. Fuller, M.L. 43 The Wabash river bed at the New Harmony, cut-off, sandstone bed of the Wabash formation in foreground. Posey County, Indiana. 1903. Figure 13 in U.S. Geological Survey. Folio 105. 1904. #1:/New Jersey-Folio 83/ijp00122 ID. Iddings, J.P. 122 Near view of columnar basalt at base of first Watchung flow, O'Rourke's Quarry west of Orange. Essex County, New Jersey. Figure 18 in U.S. Geological Survey. Folio 83. 1902. #1:/California-Folio 101/sgw00759 ID. Stose, G.W. 759 Contorted Monterey shale near Point Buchon; this isolated rock shows the characteristic crumpling to which the shale has been subjected in many places. The thin layers of hard shale are separated by partings of softer material, which has favored crumpling rather than crushing under pressure. San Luis Obispo County, California. 1903. Figure 3 in U.S. Geological Survey. Folio 101. 1904. #1:/California-Folio 101/sgw00770 ID. Stose, G.W. 770 Prominent buttes northwest of San Luis Obispo, these are the southernmost of the chain of lofty buttes extending from San Luis Obispo to Morro Bay. San Luis Obispo County, California. 1903. Figure 4 in U.S. Geological Survey. Folio 101. 1904. #1:/California-Folio 101/sgw00771 ID. Stose, G.W. 771 Quaternary terrace deposits resting unconformably on eroded edges of Monterey shale on the coast between Pismo and Port Harford. The contact is a wave-cut plain. Rain sculpture is well shown in the soft terrace gravels. San Luis Obispo County, California. 1903. Figure 1 in U.S. Geological Survey. Folio 101. 1904. #1:/California-Folio 101/sgw00773 ID. Stose, G.W. 773 Near view of one of the lenticular masses of Jasper shown in Stose photo 772, looking approximately along the strike. San Luis Obispo County, California. 1903. Figure 8 in U.S. Geological Survey. Folio 101. 1904. #1:/California-Folio 101/sgw00775 ID. Stose, G.W. 775 Sea caves north of Mallagh landing, the upper cave was cut out by waves when the land stood 10 feet lower, with reference to sea level. The volcanic ash, in which it has been cut is only slightly affected by atmospheric agencies, so that the waves undermine it. The lower cave is being formed by present wave action. San Luis Obispo County, California. 1903. Figure 12 in U.S. Geological Survey. Folio 101. 1904. #1:/California-Folio 101/sgw00778 ID. Stose, G.W. 778 Near view of a portion of a teschenite dike in Monterey shale south of Point Buchon; this dike is vertical and shows columnar structure. The columns lie horizontal and are perpendicular to the walls of the dike. The altered analcite is arranged in bands parallel to the dike wall and weathers easily causing the surface to appear ribbed at right angles to the columns. San Luis Obispo County, California. 1903. Figure 9 in U.S. Geological Survey. Folio 101. 1904. #1:/Wyoming-Folio 91/sgw00873 ID. Stose, G.W. 873 Canyon of North Platte River west of Fairbank, looking eastward; showing the massive quartzite at the base of the Hartville formation resting unconformably on the bedded rocks of the Guernsey formation. Platte County, Wyoming. 1901. Figure 4 in U.S. Geological Survey. Folio 91. 1903. #1:/Wyoming-Folio 91/sgw00874 ID. Stose, G.W. 874 Canyon of North Platte River, one and one-half miles above Wendover, looking northwesterly, a characteristic view of the canyon, which has been cut in the rocks of the Hartville formation. Platte County, Wyoming. 1901. Figure 5 in U.S. Geological Survey. Folio 91. 1903. #1:/New York-Folio 83/sgw00941 ID. Stose, G.W. 941 The Palisades of the Hudson from the New Jersey side, looking south. The vertical cliff of diabase and the steep talus covered slope are well shown. Essex County, New York. 1902. Figure 14 in U.S. Geological Survey. Folio 83. 1902. #1:/New York-Folio 83/sgw00942 ID. Stose, G.W. 942 The Palisades of the Hudson seen from Yonkers shows the even crest line of the plateau surface and the tree covered talus below the cliff. Westchester County, New York. 1902. Figure 15 in U.S. Geological Survey. Folio 83. 1902. #1:/New York-Folio 83/wil00360 ID. Willis, B. 360 Glaciated surface of Hudson schist, Bronx Park, looking northeast along the lamination of the schist, which is typically developed and brought out by weathering, glacial striae extend across the rock in the foreground. The rounded profile is characteristic of glaciated rock masses. New York City, New York. 1902. Figure 24 in U.S. Geological Survey. Folio 83. 1902. #1:/New York-Folio 83/wil00361 ID. Willis, B. 361 Glaciated surface of Hudson schist, Bronx Park, looking southeast, glacial striae appear as grooves crossing the lamination of the schist. The rounded profile is characteristic of glaciated rock masses. New York City, New York. 1902. Figure 23 in U.S. Geological Survey. Folio 83. 1902. #1:/New York-Folio 83/wil00363 ID. Willis, B. 363 Terminal moraine near Grassmere, Staten Island, looking northeast toward the heights of the island, shows the irregular hillocks, ponds and large boulders characteristic of the moraine. Richmond County, New York. 1902. Figure 22 in U.S. Geological Survey. Folio 83. 1902. #1:/New Jersey-Folio 83/wil00368 ID. Willis, B. 368 Little Falls of Passaic River at the town of Little Falls, looking up the river at a low stage. Shows the gorge cut by the river in the Watchung basalt, and the structure of the basalt. County, New Jersey. 1902. Figure 21 in U.S. Geological Survey. Folio 83. 1902 #1:/New Jersey-Folio 83/wil00370 ID. Willis, B. 370 Great Falls of Passaic, Paterson, show the escarpment of the Watchung basalt, the wide gorge cut by the stream, and the narrow cleft, into which the fall as retreated in following a major joint system. Passaic County, New Jersey. 1902. Figure 19 in U.S. Geological Survey. Folio 83. 1902, figure 28 in U.S. Geological Survey. Folio 157. 1908. #1:/New Jersey-Folio 83/wil00374 ID. Willis, B. 374 Near view of Great Falls of Passaic, Paterson, looking along the narrow cleft in which the water falls. Passaic County, New Jersey. 1902. Figure 20 in U.S. Geological Survey. Folio 83. 1902 #1:/Virginia-Folio 59/cmr00014 ID. Campbell, M.R. 14 Flat overthrust fault west of St. Paul, Virginia. This fault shows a stratigraphic displacement of 15,000 feet with the Maryville limestone (middle Cambrian) resting upon the Lee formation (upper Carboniferous). Wise County, Virginia. 1899. Figure 1 in U.S. Geological Survey Folio 59. 1899. #1:/Colorado-Folio 60/ccw00153 ID. Cross, C.W. 153 Down the La Plata valley from the divide at its head, this view shows how wide and deep this valley is at the very heart of the mountains. The steep slopes on the right are characteristic of both sides of the valley. The summits near the center are Parrott and Madden peaks, the former capped by porphyry, the latter by the light La Plata sandstone. La Plata County, Colorado 1896. Figure 7 in U.S. Geological Survey Folio 60. 1899. #1:/Colorado-Folio 60/ccw00154 ID. Cross, C.W. 154 The western summits of the La Plata Mountains from the divide at the head of the river, this view is panoramic with Cross 153. It shows the rugged character of the summits with the monzonite stocks. Near the center is Mount Moss. The sharp point on the left is Diorite Peak. Banded Mountain and Hesperus Peak are on the right. La Plata County, Colorado 1896. Figure 8 in U.S. Geological Survey Folio 60. 1899. #1:/Colorado-Folio 60/ccw00167 ID. Cross, C.W. 167 The head of the west Mancos River from Jackson Ridge showing Hesperus Peak, Mount Moss and Spiller Peak. In Hesperus Peak on the left, are many intrusive sheets or porphyry intercalated in the Mancos shales. The monzonite stock of Mount Moss, in the center of the view, sends off a wedge like arm, which upturns the shale and sheets of Hesperus Peak. On the right is Spiller Peak, the summit of which is also formed of monzonite, which has greatly indurated the strata of the McElmo formation forming the cliffs seen in the view. The loose rock of the foreground belongs to the syenite-porphyry sheet of Jackson ridge. The cliffs in the gorge of the West Mancos belong to the indurated La Plata sandstone. La Plata County, Colorado 1896. Figure 11 in U.S. Geological Survey Folio 60. 1899. #1:/Colorado-Folio 60/ccw00168 ID. Cross, C.W. 168 The head of the west Mancos River from Jackson Ridge showing Hesperus Peak, Mount Moss and Spiller Peak. In Hesperus Peak on the left, are many intrusive sheets or porphyry intercalated in the Mancos shales. The monzonite stock of Mount Moss, in the center of the view, sends off a wedge like arm, which upturns the shale and sheets of Hesperus Peak. On the right is Spiller Peak, the summit of which is also formed of monzonite, which has greatly indurated the strata of the McElmo formation forming the cliffs seen in the view. The loose rock of the foreground belongs to the syenite-porphyry sheet of Jackson ridge. The cliffs in the gorge of the West Mancos belong to the indurated La Plata sandstone. La Plata County, Colorado 1896. Figure 11 in U.S. Geological Survey Folio 60. 1899. #1:/Colorado-Folio 57/ccw00198 ID. Cross, C.W. 198 The Mount Wilson group, from the Dakota ledge, looking west of Mill Creek, looking southwest. In the foreground is the Pleistocene Lake bed, below Telluride; beyond it the Dolores Plateau, cut by Bilk Creek and Lake Fork; in the distance rise the peaks of the Mount Wilson group and on the right is Dolores Peak. San Miguel County, Colorado 1895. Figure 18 in U.S. Geological Survey Folio 57. 1899. #1:/Colorado-Folio 57/ccw00200 ID. Cross, C.W. 200 Gabbro-diorite stock at the south base of Ruffner Mountain from across East Deep Creek: the common form of outcrop of the smaller stocks. The indurated and metamorphosed Cretaceous shales appear on either side. San Miguel County, Colorado 1895. Figure 4 in U.S. Geological Survey Folio 57. 1899. #1:/Colorado-Folio 57/ccw00204 ID. Cross, C.W. 204 Cliffs of the San Juan tuff-agglomerate and the Potosi rhyolite series, east of Eder Creek; from the ridge leading up to Campbell Peak, looking east across Eder Creek to the cliffs of Dallas Peak. It shows the turret-like erosional forms often cut out of the San Juan tuffs and the more massive cliffs of the rhyolite series. San Miguel County, Colorado 1895. Figure 3 in U.S. Geological Survey Folio 57. 1899. #1:/Colorado-Folio 57/ccw00214 ID. Cross, C.W. 214 The mountains about Marshall Basin, as seen from Bridal Veil basin, the buttressed cliffs of the center ground lie between Marshall and Ingram Creeks and are carved from the San Juan formation. On the left is Marshall Creek, with its zigzag trail leading up to the basin, which is partly concealed by the ridge from Mendota Peak. The columnar cliffs of the background are in the Potosi rhyolite series. San Miguel County, Colorado 1895. Figure 5 in U.S. Geological Survey Folio 57. 1899. #1:/Colorado-Folio 57/ccw00220 ID. Cross, C.W. 220 Down Howard Fork, from south of Ophir Pass, in the valley is the town of Ophir and beyond it are the crags of Ophir Needles. In the background are the summits of the Mount Wilson group, scarcely distinguished in the photograph from the line of Yellow Mountain, owing to the clearness of the mountain air. San Miguel County, Colorado 1895. Figure 9 in U.S. Geological Survey Folio 57. 1899. #1:/Colorado-Folio 57/ccw00235 ID. Cross, C.W. 235 Landslide block south of Yellow Mountain, the view is from the divide between Leslie and Ground Hog gulches, looking toward Yellow Mountain, and shows the upper extremity of the large slide east of Trout Lake, consisting of Potosi rhyolite, interrupting the dark cliff of San Juan tuff, which is a continuation of that seen in Cross, C.W. 236. San Miguel County, Colorado 1895. Figure 16 in U.S. Geological Survey Folio 57. 1899. #1:/Colorado-Folio 57/ccw00248 ID. Cross, C.W. 248 Contact of the Ophir Needles stock with sedimentary rocks, from the railroad station at Ophir Loop, looking northeast across Howard Fork. Above is the light colored San Miguel conglomerate, split by a short wedge of diorite monzonite. Below the darker, greatly indurated beds of the McElmo, whose stratification is almost obliterated near the stock. San Miguel County, Colorado 1895. Figure 11 in U.S. Geological Survey Folio 57. 1899. #1:/Colorado-Folio 57/ccw00250 ID. Cross, C.W. 250 Cliff of diorite monzonite west of Lake Fork, from Ophir Loop, the cliff is entirely in igneous rock. At its top runs the Dakota sandstone, belonging normally at the base of the cliff. This is a part of the connecting arm between the stocks of Mount Wilson and Ophir Needles. San Miguel County, Colorado 1895. Figure 12 in U.S. Geological Survey Folio 57. 1899. #1:/Colorado-Folio 57/ccw00252 ID. Cross, C.W. 252 Diorite monzonite at Ophir Loop, with included fragments of various rocks, this cut is on the lower railroad grade, and the rock is equally rich in inclusions for several hundred yards. San Miguel County, Colorado 1895. Figure 13 in U.S. Geological Survey Folio 57. 1899. #1:/Colorado-Folio 57/ccw00254 ID. Cross, C.W. 254 A block blasted from the railroad cut seen in photo 252, this view shows the fine texture of the inclosing rock, the varying textures and shades of the inclusions, and, in one fragment, a change in composition from amphibolite to coarse diorite. It also represents the abundance of the inclusions. San Miguel County, Colorado 1895. Figure 14 in U.S. Geological Survey Folio 57. 1899. #1:/Colorado-Folio 57/ccw00258 ID. Cross, C.W. 258 From the south side of the San Miguel River looking toward Dallas Peak, which lies to the right of the center; this shows the characteristic sculpturing of the volcanic series above the San Miguel conglomerate, which is hidden by talus, except on Eder Creek. The smooth aspen-covered shale slopes lead down to the ledge of Dakota sandstone, across the San Miguel Valley from the point of view. San Miguel County, Colorado 1896. Figure 2 in U.S. Geological Survey Folio 57. 1899. #1:/Colorado-Folio 60/ccw00259 ID. Cross, C.W. 259 Down the La Plata valley from the entrance to the mountains, the level ground in the center of the view belongs to the terrace called Gold Bar. The present streambed of the La Plata is on the left. The skyline represents the principal sandstone horizon of the Mesaverde formation. In the gap on the left is situated the Hesperus station. Beyond that may be seen another strong terrace line. La Plata County, Colorado 1896. Figure 7 in U.S. Geological Survey Folio 60. 1899. #1:/Colorado-Folio 60/ccw00260 ID. Cross, C.W. 260 Up the La Plata valley from the entrance to the mountains, this view show the u-shaped valley of the La Plata. To the left of the center are Babcock and Spiller Peaks, where a stock of monzonite causes the more rugged forms. La Plata County, Colorado 1896. Figure 8 in U.S. Geological Survey Folio 60. 1899. #1:/Colorado-Folio 60/ccw00270 ID. Cross, C.W. 270 A ravine upon the northeast slope of Gibbs Peak, the rock within which this ravine is excavated is brecciated and iron stained porphyry. Erosion is progressing very rapidly at the present time. The site of the ravine was once forest covered. La Plata County, Colorado 1896. Figure 6 in U.S. Geological Survey Folio 60. 1899. #1:/Colorado-Folio 60/ccw00273 ID. Cross, C.W. 273 Bald Knob looking north along the east face of the La Plata Mountains, the steep slope on the left belongs to Lewis Mountain. The metamorphosed Dolores beds are steeply upturned and seamed by many dikes. Beyond these slopes appears the summit of Snowstorm Peak. The projecting shoulder of the middle ground exhibits nearly horizontal Dolores strata, with several intrusive sheets of porphyry. The distant peaks belong to the western part of the San Juan Mountains. La Plata County, Colorado 1896. Figure 1in U.S. Geological Survey Folio 60. 1899. #1:/Colorado-Folio 60/ccw00278 ID. Cross, C.W. 278 The Sharkstooth from the east looking across Bear Creek, the summit of this most northern point of the La Plata Mountain is due to an intrusive sheet in the Mancos shales. The debris from the disintegration on that sheet spreads out over the soft shales as a wide field of slide rock. A notable talus slope from the upper cliffs partially conceals the outcrops of the Mancos shales, the Dakota sandstone, and the lower McElmo formation, within which is a thick sheet of porphyry. La Plata County, Colorado 1896. Figure 5 in U.S. Geological Survey Folio 60. 1899. #1:/Oregon-Folio 49/djs00350 ID. Diller, J.S. 350 Mass of Umpqua shale inclosed in diabase along the railroad a short distance north of Roseburg, Douglas County, Oregon. 1898. Figure 2 in U.S. Geological Survey Folio 49. 1898. #1:/Oregon-Folio 49/djs00355 ID. Diller, J.S. 355 Ledge of amphibole-schist one-half mile northeast of Winston bridge near the road to Roseburg; the hills beyond are of chert, schist and metagabbro. Douglas County, Oregon. 1898. Figure 1 in U.S. Geological Survey Folio 49. 1898. #1:/Colorado-Folio 71/sgw00674 ID. Stose, G.W. 674 General view of the Spanish Peaks, from the northwest, West Spanish Peak on the right of the picture; East Spanish Peak on the left; flat-topped bluff of Cuchara sandstone on the extreme left. View is taken from the north end of the great dike ridge, seen in the middle of the picture. Las Animas County, Colorado. 1896. Figure 5 in U.S. Geological Survey Folio 71. 1901. #1:/Colorado-Folio 71/sgw00675 ID. Stose, G.W. 675 West Spanish Peak, from the northwest. Flat-lying Eocene rocks outcrop on the middle slopes of the mountain. One large dike and several smaller ones are seen in the foreground. Las Animas County, Colorado. 1896. Figure 4 in U.S. Geological Survey Folio 71. 1901. #1:/Colorado-Folio 71/sgw00676 ID. Stose, G.W. 676 East Spanish Peak, from the northwest, the great dike, which runs north from the West Peak, is shown in the middle ground. The ridge on the left is granite porphyry. Las Animas County, Colorado. 1896. Figure 3 in U.S. Geological Survey Folio 71. 1901. #1:/Colorado-Folio 71/sgw00677 ID. Stose, G.W. 677 The great dike north of West Spanish Peak, from the northwest; horizontal lines on the dike are casts of the bedding planes of the inclosing Cuchara sandstone. Base of the West Peak is on the right. Las Animas County, Colorado. 1896. Figure 6 in U.S. Geological Survey Folio 71. 1901. #1:/Colorado-Folio 71/sgw00678 ID. Stose, G.W. 678 Near view of the great dike north of West Spanish Peak, from the northeast, at this point it forms a continuous wall; 100 feet in height. Las Animas County, Colorado. 1896. Figure 7 in U.S. Geological Survey Folio 71. 1901. #1:/Italy-Folio 15/sgw00779 ID. Stose, G.W. 779 The cinder cone forming the summit of Mount Vesuvius. The steep slopes of the cone closely resemble those of the cinder cone near Lassen Peak, in the foreground are masses of lava, congealed as they flowed out. A little spiracle of stiff lava has been built up over a vent in the side of the cone. Italy. Circa 1895. Figure 5 in U.S. Geological Survey Folio 15. 1885. #1:/Colorado-Folio 58/sgw00780 ID. Stose, G.W. 780 Fishers Peak and Raton Mesa, this view is taken from near the Eagle mine. It shows the flat-topped character of the mesa, which rises 3,000 feet above and the vertical cliffs of basalt forming the summit. The slopes of the mountain are composed of the coal bearing Laramie, a hard stratum of which has produced the terrace in the middle ground. The rock exposed in the foreground is the Trinidad formation. Las Animas County, Colorado. 1898. Figure 2 in U.S. Geological Survey Folio 58. 1899. #1:/Colorado-Folio 58/sgw00781 ID. Stose, G.W. 781 Conical buttes of igneous rocks, this represents on of the most typical of the volcanic plugs of the district. It consists of a cylindrical mass of basalt occupying the vent of an extinct volcano and is surrounded by a accumulation of basalt talus. The butte is situated one mile north of Adair station, on the Colorado and Southern Railroad. Las Animas County, Colorado. 1898. Figure 3 in U.S. Geological Survey Folio 58. 1899. #1:/Colorado-Folio 58/sgw00782 ID. Stose, G.W. 782 Igneous buttes of irregular form, this is one of row of plug like bodies of lamprophyre which are connected with one another by dike like bodies of the same material. They occur in the northern part of the quadrangle. Las Animas County, Colorado. 1898. Figure 4 in U.S. Geological Survey Folio 58. 1899. #1:/Texas-Folio 42/sgw00940 ID. Stose, G.W. 940 Hillcoat Cavern, giant pillar and arch of roof, Edwards County, Texas. 1898. Figure 4 in U.S. Geological Survey Folio 42. 1898. #1:/California-Folio 37/thw00003 ID. Turner, H.W. 3 Quartz-porphyry-breccia intersected by a system of vertical joint planes, one-half mile southwest of Salmon Lake. Sierra County, California. 1896. Figure 5 in U.S. Geological Survey Folio 37. 1897. #1:/California-Folio 37/thw00006 ID. Turner, H.W. 6 Sierra Buttes and lower Sardine Lake, the distant slopes are bare and smoothed by glaciers. The high ridge on the left is beginning a moraine. Sierra County, California. 1896. Figure 3 in U.S. Geological Survey Folio 37. 1897. #1:/California-Folio 37/thw00007 ID. Turner, H.W. 7 Moraines south of Sardine Creek, showing a younger east-west moraine cutting across and older north-south moraine. Sierra County, California. 1896. Figure 4 in U.S. Geological Survey Folio 37. 1897. #1:/California-Folio 43/thw00012 ID. Turner, H.W. 12 Hypersthene-andesite on Franklin Hill; shows the slaty structure of the lava. Plumas County, California. 1896. Figure 5 in U.S. Geological Survey Folio 43. 1898. #1:/California-Folio 43/thw00013 ID. Turner, H.W. 13 Fault scarp at head of Dogwood Creek; the wooded flat to the right of the scarp is capped with Tertiary lavas and represents a downthrown block. Plumas County, California. 1896. Figure 6 in U.S. Geological Survey Folio 43. 1898. #1:/California-Folio 43/thw00014 ID. Turner, H.W. 14 Falls of Fall River and the canyon into which it descends; the gorge was eroded along a vertical sheeted zone in the granodiorite. The falls are about 450 feet in height. Butte County, California. 1896. Figure 3 in U.S. Geological Survey Folio 43. 1898. #1:/California-Folio 43/thw00029 ID. Turner, H.W. 29 Perched boulder on a glaciated rock surface north of Bloods. Alpine County, California. 1898. Figure 1 in U.S. Geological Survey Folio 51. 1898. #1:/California-Folio 43/thw00031 ID. Turner, H.W. 31 Potholes in the canyon of the North Fork of Mokelumne River about 5 miles northwest of Bloods. Calaveras County, California. 1898. Figure 2 in U.S. Geological Survey Folio 51. 1898. #1:/Colorado-Folio 130/ccw00336 ID. Cross, C.W. 336 The southeastern peaks of the Rico Mountains, from the west side of Dolores River. In the center, on the skyline is the porphyry cap of Dolores Peak, behind which rises Blackhawk Peak. Farther to the left is the north shoulder of Blackhawk Peak, with its light-colored porphyry cliffs. On the right is Whitecap Mountain, with its porphyry sheets, and in front of it Deadwood Gulch. Across the face of Dolores Mountain may be traced the limestone ledges in the middle of the Hermosa formation. Dolores County, Colorado. October 1898. Plate 3, part 2, U.S. Geological Survey. 21st Annual Report. 1900: figure 1 in U.S. Geological Survey. Folio 130. 1905. #1:/Colorado-Folio 130/ccw00339 ID. Cross, C.W. 339 Telescope Mountain and the upper part of C.H.C. Hill from Sandstone Mountain. The highest point is the summit of Telescope Mountain. On the left is a scarp of Hermosa and Rico strata. On the right is the ridge leading down to Nigger Baby Hill. The foreground and central part of the view show the landslide topography of C.H.C. Hill. The Pigeon vein or "big fissure" runs beneath the snow-covered bench. The Pigeon mine building in foreground. Dolores County, Colorado. October 1898. Plate 15, part 2, U.S. Geological Survey. 21st Annual Report. 1900: figure 5 in U.S. Geological Survey. Folio 130. 1905. #1:/Colorado-Folio 130/ccw00341 ID. Cross, C.W. 341 Darling Ridge and Horse Gulch, from Sandstone Mountain, at the head of Horse Gulch, on the right, is Calico Peak, and on the left Anchor Mountain. The snow covered slope of Darling ridge on the left from the creek to the forested crest is wholly occupied by landslide debris. The Puzzle mine is situated t the foot of the snowy slope, in a landslide block. Dolores County, Colorado. October 1898. Plate 10, part 2, U.S. Geological Survey. 21st Annual Report. 1900: figure 3 in U.S. Geological Survey. Folio 130. 1905. #1:/Colorado-Folio 130/ccw00351 ID. Cross, C.W. 351 Details of landslide topography in the area on the north side of Horse Gulch, the view shows characteristic landslide trenches, ridges and mounds, where disintegration has smoothed out the originally more angular forms of slide blocks. In the background are strongly contrasting ledge outcrops. Dolores County, Colorado. October 1898. Plate 12, part 2, U.S. Geological Survey. 21st Annual Report. 1900: figure 6 in U.S. Geological Survey. Folio 130. 1905. #1:/Colorado-Folio 130/ccw00353 ID. Cross, C.W. 353 Sandstone Mountain, looking across the Dolores from the foot of C.H.C. Hill; the view illustrates the character of cliff exposures formed by the alternating limestone, sandstone and shale beds of the Hermosa formation, and the similar ones of the lower portion of the Dolores red beds in the knolls to the right. The crevice crossing the summit of Sandstone Mountain marks the line of small fault. Dolores County, Colorado. November 1898. Plate 6, part 2, U.S. Geological Survey. 21st Annual Report. 1900: figure 2 in U.S. Geological Survey. Folio 130. 1905. #1:/Colorado-Folio 120/ccw00461 ID. Cross, C.W. 461 From Snowdon Peak north toward Silverton, in the center lies Molas Lake underlain by Ouray limestone. On the deforested slope to the left are ledges of Carboniferous limestone. Above these rise Grand Turk and other mountains of San Juan tuff. To the right of the lake is the line of Animas Canyon, with Kendall Mountain beyond. San Juan County, Colorado. August 22, 1900. Figure 1 in U.S. Geological Survey. Folio 120. 1905. #1:/Colorado-Folio 120/ccw00481 ID. Cross, C.W. 481 Down Ironton Park from mouth of Gray Copper gulch, the nearly level park extends for 1.5 miles from the viewpoint. On the right is Saratoga mill and mine buildings, where Algonkian quartzites and overlying Paleozoic beds appear. On the left is fan of Full Moon gulch, with Carboniferous sandstone at the road level on either side. Above, on Hayden Mountain, appear characteristic cliffs of San Juan tuff. Ouray County, Colorado. September 12, 1900. Figure 2 in U.S. Geological Survey. Folio 120. 1905. #1:/Colorado-Folio 131/ccw00497 ID. Cross, C.W. 497 Stag Mesa, from near Overlook Point; debris of Ignacio quartzite on the right; rough surface beyond the foreground is formed by Eolus granite, on which, in the middle distance, rest the older Paleozoic rocks of Stag Mesa. In the distance is the escarpment of the Hermosa formation on the west side of the Animas Valley, while in the distance rise the La Plata Mountains, composed in part of Cretaceous rocks. La Plata County, Colorado. July 15, 1901. Figure 2 in U.S. Geological Survey. Folio 131. 1905 #1:/Colorado-Folio 131/ccw00498 ID. Cross, C.W. 498 Lime Mesa, from near Overlook Point; Ignacio quartzite rests on the granite at foot of talus from Lime Mesa, the prominent escarpment is formed by Ouray limestone. To the left is a small glacial lake in the Ignacio; to the right of Lime Mesa is the upper portion of Canyon Creek; a branch of Florida River is to the extreme left. Valleys of the Animas and the Florida appear in the distance. La Plata County, Colorado. July 15, 1901. Figure 1 in U.S. Geological Survey. Folio 131. 1905. #1:/Colorado-Folio 131/ccw00514 ID. Cross, C.W. 514 Pigeon and Turret Peaks, from Mountain View Crest, nearly 4 miles distant: New York Basin is to the right. These are two of the highest and conspicuous summits of the Needle Mountain, and are composed entirely of Eolus granite. La Plata County, Colorado. July 15, 1901. Figure 4 in U.S. Geological Survey. Folio 131. 1905. #1:/Colorado-Folio 131/ccw00530 ID. Cross, C.W. 530 The Guardian and the eastern end of the Grenadier Range: from a point just north of Mount Nebo. San Juan County, Colorado. August 8, 1903. Figure 9 in U.S. Geological Survey. Folio 131. 1905. #1:/Colorado-Folio 131/ccw00531 ID. Cross, C.W. 531 Closed and overturned folds of Uncompahgre quartzites and slates in region about head of Vallecito Creek; White Dome is in the middle (Cross, photo 532); Grenadier Range and the west fork of the Vallecito are on the left (Cross, 533): Hunchback Mountain is slightly to the right of White Dome, from a point just north of Mount Nebo. San Juan County, Colorado. August 8, 1901. Figure 5, a panorama, in U.S. Geological Survey. Folio 131. 1905. #1:/Colorado-Folio 131/ccw00532 ID. Cross, C.W. 532 Closed and overturned folds of Uncompahgre quartzites and slates in region about head of Vallecito Creek; White Dome is in the middle (Cross, photo 532); Grenadier Range and the west fork of the Vallecito are on the left (Cross, 533): Hunchback Mountain is slightly to the right of White Dome, from a point just north of Mount Nebo. San Juan County, Colorado. August 8, 1901. Figure 5, a panorama, in U.S. Geological Survey. Folio 131. 1905. #1:/Colorado-Folio 131/ccw00533 ID. Cross, C.W. 533 Closed and overturned folds of Uncompahgre quartzites and slates in region about head of Vallecito Creek; White Dome is in the middle (Cross, photo 532); Grenadier Range and the west fork of the Vallecito are on the left (Cross, 533): Hunchback Mountain is slightly to the right of White Dome, from a point just north of Mount Nebo. San Juan County, Colorado. August 8, 1901. Figure 5, a panorama, in U.S. Geological Survey. Folio 131. 1905. #1:/Colorado-Folio 120/ccw00558 ID. Cross, C.W. 558 Talus piles in eastern branch of Horseshoe Basin; shows relation of talus and cliffs where a snow bank against foot of cliff is supposed to have aided in accumulation of debris at some distance from cliff. This mass grades into a rock stream at its upper end. Hinsdale County, Colorado. September 2, 1901. Figure 3 in U.S. Geological Survey. Folio 120. 1905. #1:/South Dakota-Folio 108/dnh00670 ID. Darton, N.H. 670 Grindstone quarry in upper beds of Dakota formation, north of Edgemont, Fall River County, South Dakota. 1903. Figure 10 in U.S. Geological Survey. Folio 108. 1904. #1:/South Dakota-Folio 108/dnh00673 ID. Darton, N.H. 673 Fossil tree trunk from Lakota sandstone, three miles southwest of Minnekahta; looking east toward Parker Knob. Fall River County, South Dakota. 1903. Figure 7 in U.S. Geological Survey. Folio 108. 1904. #1:/Wyoming-Folio 127/dnh00741 ID. Darton, N.H. 741 Sundance Mountain. The remnant of a laccolith lying on a platform of Sundance formations; shows columnar to massive porphyry and characteristic talus, Spearfish red beds in foreground. Looking southwest from a point 1 mile east of Sundance. Crook County, Wyoming. 1904. Figure 7 in U.S. Geological Survey. Folio 127. 1905. #1:/Wyoming-Folio 127/dnh00745 ID. Darton, N.H. 745 Columnar porphyry on Inyankara Mountain, view of the central knob, looking northwest. Crook County, Wyoming. 1904. Figure 6 in U.S. Geological Survey. Folio 127. 1905. #1:/Wyoming-Folio 127/dnh00747 ID. Darton, N.H. 747 Sheep Mountain from the south. An uplifted block of Deadwood formation overlain by Whitewood and Pahasapa limestones; fault is at foot of cliff, beyond houses, and to the right curves around mountain; Spearfish red beds in foreground, Deadwood sandstone cliffs in middle ground, and Pahasapa limestone to right in distance. #1:/South Dakota-Folio 108/dnh00754 ID. Darton, N.H. 754 Sandstone dike in Graneros shale, two and one-half miles northeast of Maitland, Lawrence County, South Dakota. 1903. Figure 6 in U.S. Geological Survey. Folio 108. 1904. #1:/Wyoming-Folio 107/dnh00776 ID. Darton, N.H. 776 Small hogback ridges at reservoir southwest of Clifton siding, the ridges at the left in the Carlile formation; the Greenhorn limestone forms the ridge opposite the dam. Weston County, Wyoming. 1903. Figure 11 in U.S. Geological Survey. Folio 107. 1904. #1:/Wyoming-Folio 142/dnh00926 ID. Darton, N.H. 926 U-shaped glaciated valley of upper part of South Piney Creek, looking west. Cloud Peak on right with low col to left. Smooth, bare granite walls and floor typical of glaciated valleys. Johnson Wyoming. August 1902. Figure 8 in U.S. Geological Survey. Folio 142. 1906. #1:/Wyoming-Folio 142/dnh00997 ID. Darton, N.H. 997 Steep upturn in the rocks of the front range of the Bighorn Mountain, north side of North Fork of Crazy Woman Creek, looking north, the thin beds in middle and at right of view are the Amsden and Tensleep sandstone formations. The massive limestone to the left and in the high peak is Madison limestone. Johnson Wyoming. 1905. Figure 16 in U.S. Geological Survey. Folio 142. 1906. #1:/South Dakota-Folio 108/dnh01810 ID. Darton, N.H. 1810 Characteristic fossil of Niobrara formation and Greenhorn limestone, important guide in well boring: Ostrea congesta. South Dakota. 1903. Figure 11-A in U.S. Geological Survey. Folio 108. 1904; figure 9-A in U.S. Geological Survey. Folio 127. 1905 #1:/South Dakota-Folio 108/dnh01811 ID. Darton, N.H. 1811 Characteristic fossil of Niobrara formation and Greenhorn limestone, important guide in well boring: Inoceramus labiatus. South Dakota. 1903. Figure 11-B in U.S. Geological Survey. Folio 108. 1904; figure 9-B in U.S. Geological Survey. Folio 127. 1905 #1:/Colorado-Folio 120/howe0010 ID. Howe, E. 10 Glaciated surface in Animas Canyon; shows light gray Twilight gneissose granite cutting dark amphibolites. San Juan County, Colorado. August 11, 1901. Figure 10 in U.S. Geological Survey. Folio 131. 1905. #1:/Colorado-Folio 120/howe0011 ID. Howe, E. 11 Inclusions of amphibole-schist in Twilight gneissose granite, illustrates manner in which the gneissose banding follows the irregular outlines of included schist fragments. San Juan County, Colorado. August 11, 1901. Figure 11 in U.S. Geological Survey. Folio 131. 1905. #1:/Colorado-Folio 120/howe0081 ID. Howe, E. 81 The Vallecito and the Guardian, from a point not far above mouth of Johnson Creek. Stream gravels and terraces in the foreground, the cliffs to the left are Eolus granite, all else being within the area of Uncompahgre quartzites and slates. San Juan Colorado. July 26, 1901. Figure 7 in U.S. Geological Survey. Folio 131. 1905. #1:/Colorado-Folio 120/howe0103 ID. Howe, E. 103 Torrential fans on south slope of Rio Grande below Deep Creek, from slope of Sheep Mountain; ravines cutting into forested hillside of San Juan tuff are depositing most of the detritus in torrential fans below. Rio Grande County, Colorado. August 12, 1901. Figure 5 in U.S. Geological Survey. Folio 120. 1905. #1:/Colorado-Folio 131/howe0176 ID. Howe, E. 176 Mount Garfield, from the northern end of Elk Park, Animas Canyon; near center of picture the vertical strata of Uncompahgre quartzites are shown. The well defined ravine below and to the left of Mount Garfield marks the fault which bounds the quartzites at the river. The peak of Mount Garfield itself consists of northward-dipping quartzites, which have thrust over the Archean schists. San Juan County, Colorado. August 11, 1901. Figure 6 in U.S. Geological Survey. Folio 131. 1905. #1:/Colorado-Folio 131/howe0178 ID. Howe, E. 178 Arrow and Vestal Peaks, seen across Elk Creek from divide near head of Whitehead Creek. In Vestal Peak, to the left, are shown upturned strata of Uncompahgre quartzite, characteristic of the whole Grenadier Range. San Juan County, Colorado. August 14, 1901. Figure 8 in U.S. Geological Survey. Folio 131. 1905. #1:/Colorado-Folio 153/howe0205 ID. Howe, E. 205 Up Bear Creek from point near its mouth, above road, on the left are steeply dipping quartzites and slates of the Uncompahgre formation, overlain with irregular unconformity by horizontal San Juan tuff. The same structure is present on right though less clearly exposed. Ouray County, Colorado. July 3, 1904. Figure 6 in U.S. Geological Survey. Folio 153. 1907. #1:/Colorado-Folio 153/howe0226 ID. Howe, E. 226 Dike Ridge from Porphyry Basin, shows characteristic cliffs of San Juan tuff- agglomerate and overlying Potosi volcanic series, with four notable dikes of monzonite porphyry, which in some places stand out as walls. Hinsdale County, Colorado. August 4, 1904. Figure 8 in U.S. Geological Survey. Folio 153. 1907. #1:/Colorado-Folio 153/howe0235 ID. Howe, E. 235 Porphyry dike cutting San Juan tuff on divide at head of Dexter Creek, illustrates the common texture, rude bedding and general appearance of the San Juan tuff-agglomerate where little altered. The dike is one of several crossing Cow Creek with similar wall-lake outcrops. Ouray County, Colorado. August 8, 1904. Figure 5 in U.S. Geological Survey. Folio 153. 1907. #1:/Colorado-Folio 153/howe0239 ID. Howe, E. 239 Fold in carboniferous strata on west side of Uncompahgre River south of Corbett Gulch; from point on east side of river near trail to Bright Diamond mine. The Triassic and later beds unconformably overlie these folded strata, but the unconformity is hidden. Ouray County, Colorado. August 19, 1904. Figure 9 in U.S. Geological Survey. Folio 153. 1907. #1:/Colorado-Folio 153/howe0240 ID. Howe, E. 240 Fold in carboniferous strata on west side of Uncompahgre River south of Corbett Gulch; from point on east side of river near trail to Bright Diamond mine. The Triassic and later beds unconformably overlie these folded strata, but the unconformity is hidden. Ouray County, Colorado. August 19, 1904. Figure 9 in U.S. Geological Survey. Folio 153. 1907. #1:/Colorado-Folio 153/howe0242 ID. Howe, E. 242 The Amphitheater and cliffs to the north from a point west of Uncompahgre River, illustrates the unconformity below the Dolores formation. This nearly horizontal strata at the level of the point of view are above the unconformity; the inclined strata below belong to the Hermosa and Cutler formations. The back wall of The Amphitheater is San Juan tuff-agglomerate; its floor is landslide debris. Ouray County, Colorado. August 22, 1904. Figure 7 in U.S. Geological Survey. Folio 153. 1907. #1:/Colorado-Folio 153/howe0250 ID. Howe, E. 250 Looking westward across Cow Creek and Uncompahgre valley from a hill south of Lou Creek, illustrating the gravel deposits of the Uncompahgre valley. In the central foreground is a bench of the later terrace gravels trenched by Lou Creek. At the extreme right is the dip slope of the earlier terrace gravels, which also cap the hill from which the view is taken. The two gravel covered mesas to the right of the center lie just beyond Cow Creek. Beyond these mesas is the valley of Uncompahgre and beyond that is the slope covered by earlier gravels, rising to Horse Fly Peak, a small prominence on the skyline near the center of the view. At that point lie older glacial gravels. The left half of the view embraces the hills of Mancos shale between Cow Creek and the Uncompahgre and in the distance, the mountains west of Mount Sneffels. Ouray County, Colorado. September 9, 1904. Figure 10 in U.S. Geological Survey. Folio 153. 1907. #1:/Colorado-Folio 153/howe0251 ID. Howe, E. 251 Looking westward across Cow Creek and Uncompahgre valley from a hill south of Lou Creek, illustrating the gravel deposits of the Uncompahgre valley. In the central foreground is a bench of the later terrace gravels trenched by Lou Creek. At the extreme right is the dip slope of the earlier terrace gravels, which also cap the hill from which the view is taken. The two gravel covered mesas to the right of the center lie just beyond Cow Creek. Beyond these mesas is the valley of Uncompahgre and beyond that is the slope covered by earlier gravels, rising to Horse Fly Peak, a small prominence on the skyline near the center of the view. At that point lie older glacial gravels. The left half of the view embraces the hills of Mancos shale between Cow Creek and the Uncompahgre and in the distance, the mountains west of Mount Sneffels. Ouray County, Colorado. September 9, 1904. Figure 10 in U.S. Geological Survey. Folio 153. 1907. #1:/Colorado-Folio 153/howe0252 ID. Howe, E. 252 Looking westward across Cow Creek and Uncompahgre valley from a hill south of Lou Creek, illustrating the gravel deposits of the Uncompahgre valley. In the central foreground is a bench of the later terrace gravels trenched by Lou Creek. At the extreme right is the dip slope of the earlier terrace gravels, which also cap the hill from which the view is taken. The two gravel covered mesas to the right of the center lie just beyond Cow Creek. Beyond these mesas is the valley of Uncompahgre and beyond that is the slope covered by earlier gravels, rising to Horse Fly Peak, a small prominence on the skyline near the center of the view. At that point lie older glacial gravels. The left half of the view embraces the hills of Mancos shale between Cow Creek and the Uncompahgre and in the distance, the mountains west of Mount Sneffels. Ouray County, Colorado. September 9, 1904. Figure 10 in U.S. Geological Survey. Folio 153. 1907. #1:/North Carolina-Folio 143/kei00117 ID. Keith, A. 117 Characteristic outcrop of gabbro, one-half mile north of Toecane, looking northeast. Spheroidal weathering is characteristic of the gabbro in this region, and rounded boulders strew its surface. The rock is not metaphosed and presents a strong contrast to the Roan gneiss, which is similar composition. Mitchell County, North Carolina. 1897. Figure 15 in U.S. Geological Survey. Folio 151. 1907. #1:/Tennessee-Folio 151/kei00119 ID. Keith, A. 119 Close folding in massive Blue dolomite along the Nolichucky River northeast of Embreeville, the great compression during folding is shown by the thinning of the darker lower layers on the steeply upturned side of the fold. Incipient flat sheer faults, similar to larger faults in this vicinity are seen near base of the fold. Washington County, Tennessee. 1897. Figure 9 in U.S. Geological Survey. Folio 151. 1907. #1:/North Carolina-Folio 143/kei00151 ID. Keith, A. 151 Valley river bottom and flanking ridges; looking west from 2 miles southwest of Andrews, the floor of the valley is underlain by Murphy Marble and the terrace hill on the left by Andrews schist, while the farther wall of the valley is formed by Valleytown schist and gneisses. Snowbird Mountains in the distance are composed chiefly of Great Smoky conglomerate. Cherokee County, North Carolina. 1902. Figure 3 in U.S. Geological Survey. Folio 143. 1907. #1:/North Carolina-Folio 151/kei00158 ID. Keith, A. 158 Granitoid gneiss with folded quartzose layers 5 miles east of Big Yellow Mountain. The quartz layers were added to the granitoid rock before its metamorphism and show the greatest crumpling to which the gneisses have been subjected in places. They present marked contrast with the veins in Roan gneiss shown in Keith 351. Avery County, North Carolina 1902. Figure 7 in U.S. Geological Survey. Folio 151. 1907. #1:/North Carolina-Folio 147/kei00242 ID. Keith, A. 242 Pisgah Mountain from Eagles Nest, 3 miles northwest of Waynesville, looking S. 70 degrees E. The valley of Richland Creek and part of Waynesville are in the foreground, 2,000 feet below the point of view. Beatty Knob, beyond the valley shows the details of ridges and spurs characteristic of these mountains. Cold Mountain, 6,000 feet in altitude and Big Pisgah Mountain, 5, 749 feet form the skyline. Haywood County North Carolina. 1902. Figure 5 in U.S. Geological Survey. Folio 147. 1907. #1:/South Carolina-Folio 147/kei00275 ID. Keith, A. 275 Plateau and escarpment of the Blue Ridge from Caesars Head, looking S 30 degrees W. to N. 80 degrees W. The plateau extends westward to the foot of Great Hogback, in the distance on right 20 miles away. Table Rock and the Piedmont are seen on the left, the latter 2,000 feet below the viewpoint. Greenville County, South Carolina. 1902. Plate 18 in U.S. Geological Survey. Professional paper 72. 1911; figure 1 in U.S. Geological Survey. Folio 147. 1907 #1:/South Carolina-Folio 147/kei00276 ID. Keith, A. 276 Plateau and escarpment of the Blue Ridge from Caesars Head, looking S 30 degrees W. to N. 80 degrees W. The plateau extends westward to the foot of Great Hogback, in the distance on right 20 miles away. Table Rock and the Piedmont are seen on the left, the latter 2,000 feet below the viewpoint. Greenville County, South Carolina. 1902. Plate 18 in U.S. Geological Survey. Professional paper 72. 1911; figure 1 in U.S. Geological Survey. Folio 147. 1907 #1:/South Carolina-Folio 147/kei00277 ID. Keith, A. 277 Plateau and escarpment of the Blue Ridge from Caesars Head, looking S 30 degrees W. to N. 80 degrees W. The plateau extends westward to the foot of Great Hogback, in the distance on right 20 miles away. Table Rock and the Piedmont are seen on the left, the latter 2,000 feet below the viewpoint. Greenville County, South Carolina. 1902. Plate 18 in U.S. Geological Survey. Professional paper 72. 1911; figure 1 in U.S. Geological Survey. Folio 147. 1907 #1:/North Carolina-Folio 147/kei00282 ID. Keith, A. 282 Plateau of Pigeon River, 2 miles southeast of Waynesville, looking nearly north, Chambers Mountain is seen in the distance. The point of view is on a pebble covered terrace, other remnants of which can be seen curving upward in their usual relation to the plateau summits. This view is typical of the details of all the plateaus, where they are not deeply dissected. Haywood County North Carolina. 1902. Figure 4 in U.S. Geological Survey. Folio 147. 1907. #1:/North Carolina-Folio 143/kei00301 ID. Keith, A. 301 Gorge of Nantahala River at Cliff Ridge; looking northeast from 2 miles southwest of Nantahala station. The gorge is excavated along a narrow band of Murphy marble, and the rugged slopes on the left are upheld by Valleytown formation. Cliff Ridge, on the right, the edge of the plateau of Nantahala River, is formed by the hard topmost bed of Great Smoky conglomerate, Nantahala slate forming the steep slope. Macon County, North Carolina. 1902. Figure 1 in U.S. Geological Survey. Folio 143. 1907. #1:/North Carolina-Folio 143/kei00303 ID. Keith, A. 303 Surface of Murphy marble stripped for quarrying; 2 miles southwest of Tomotla, looking northeast along the strike; beyond the quarry is seen a thin layer of auriferous gravel, which has elsewhere been successfully washed for gold. On the right is a ridge of Nottely quartzite; on the left a ridge of Valleytown formation. Cherokee County, North Carolina. 1902. Figure 2 in U.S. Geological Survey. Folio 143. 1907. #1:/Tennessee-Folio 151/kei00320 ID. Keith, A. 320 Ledges of flat-lying shady limestone at east end of Bumpass Cove, looking S. 60 degrees W. The rock surface has been stripped of its residual clay in mining iron ore. The irregular and deeply channeled surfaces, due to solution of the rock, is characteristic of the decay of limestone formations. Washington County, Tennessee. 1902. Figure 6 in U.S. Geological Survey. Folio 151. 1907. #1:/North Carolina-Folio 151/kei00351 ID. Keith, A. 351 Roan gneiss with secondary lenses of quartz along the planes of schistosity 2.25 miles south of Toecane, on Toe River. The gneiss is highly metamorphosed and schistose, while the quartz lenses, which are later are unmetamorphosed. This parallel foliation is characteristic of Roan gneiss. Mitchell County, North Carolina. 1904. Figure 8 in U.S. Geological Survey. Folio 151. 1907. #1:/Tennessee-Folio 151/kei00380 ID. Keith, A. 380 Upper part of Erwin quartzite, three-fourths of a mile west of Unaka Springs, looking southwest. The quartzite are interbedded with thin layers of slate. The prominent bed is composed of about 20 feet extreme hard vitreous white quartzite, which forms the crests of most of the ridges and their slopes with talus. On the extreme is the dark residual clay of the overlying Shady limestone. Unicoi County, Tennessee. 1906. Figure 14 in U.S. Geological Survey. Folio: 151. 1907. #1:/North Carolina-Folio 147/kei00382 ID. Keith, A. 382 Shining Rock on Pisgah Mountain: looking N. 20 degrees W. The rock is a mass of white sugary quartz, 30 to 60 feet thick. It is more than one-eighth of a mile long and terminates beyond the summit of the mountain. Offsets in the course can be seen, which are probably due to displacement along the vertical joint planes that cut the quartz in great number. Haywood County, North Carolina. 1906. Figure 3 in U.S. Geological Survey. Folio 147. 1907. #1:/North Carolina-Folio 147/kei00389 ID. Keith, A. 389 Lookinglass Mountain from Bennett Gap, 1.5 miles distant, looking S 30 degrees W. Dome structure is strongly developed in the granite at the northern end of the Mountain, Cedar Rock, another dome is seen at left and part of Pisgah Ridge on the right. The mass of granite is anticlinal and pitches northwestward, disappearing near Bennett Gap. Transylvania County, North Carolina. 1906. Figure 2 in U.S. Geological Survey. Folio 147. 1907 #1:/North Carolina-Folio 151/kei00420 ID. Keith, A. 420 Gorge of Nolichucky River, 1 mile west of Poplar, looking N.80 degrees E. The ruggedness of the channel is caused by hard ledges of Unicoi quartzite. The narrow channel is shown in the lower left corner is in strong contrast with broader stretch shown in figure 11. Yancey County, North Carolina. 1906. Figure 4 in U.S. Geological Survey. Folio 151. 1907. #1:/North Carolina-Folio 151/kei00422 ID. Keith, A. 422 Horizontal beds of Unicoi quartzite, strongly jointed about 1 mile west of Poplar, looking S. 63 degrees W. This quartzite is feldspathic, strongly jointed and shows incipient schistosity along the joint planes. The joints are nearly parallel to the great overthrust fault plane farther south and shows how the quartzite beds are sheared across by the faults. Yancey County, North Carolina. 1907. Figure 4 in U.S. Geological Survey. Folio 151. 1907. #1:/Tennessee-Folio 151/kei00428 ID. Keith, A. 428 Eastern border of East Tennessee valley , one-half mile west of Unaka Springs, looking N. 30 degrees E. The flat valley is underlain by the Shady limestone, Watauga shale and Honaker limestone. The foothills of the Unaka Mountains ,on the right, are composed of the uppermost Cambrian quartzites. In the distance, Rich Mountain, on the left, and Buffalo and Cherokee mountains, on the right are composed lower Cambrian quartzites, which were thrust forward from their original location, far to the right. They now rest upon younger Cambrian strata, with which they have since been folded and faulted in general syncline. Unicoi County, Tennessee. 1907. Figure 10 in U.S. Geological Survey. Folio 151. 1907. #1:/Tennessee-Folio 151/kei00429 ID. Keith, A. 429 Eastern border of East Tennessee valley, one-half mile west of Unaka Springs, looking N. 30 degrees E. The flat valley is underlain by the Shady limestone, Watauga shale and Honaker limestone. The foothills of the Unaka Mountains ,on the right, are composed of the uppermost Cambrian quartzites. In the distance, Rich Mountain, on the left, and Buffalo and Cherokee mountains, on the right are composed lower Cambrian quartzites, which were thrust forward from their original location, far to the right. They now rest upon younger Cambrian strata, with which they have since been folded and faulted in general syncline. Unicoi County, Tennessee. 1907. Figure 10 in U.S. Geological Survey. Folio 151. 1907. #1:/Tennessee-Folio 151/kei00435 ID. Keith, A. 435 Doe River Gap, in Iron Mountain, Hampton, looking N 10 degrees W. The floor of the valley is covered by gravel and clay overlying Shady limestone. Iron Mountain is formed by the entire Cambrian quartzite series faulted up on top of the Shady limestone. The portion the of the gap shows a double crest form by the Snowbird formation and the Cochran conglomerate, a depression of Hiwassee slate lying between. The knob seen through the gap is formed by Erwin quartzite. Carter Tennessee. 1907. Figure 12 in U.S. Geological Survey. Folio 151. 1907. #1:/Tennessee-Folio 151/kei00436 ID. Keith, A. 436 Doe River Gap, in Iron Mountain, Hampton, looking N 10 degrees W. The floor of the valley is covered by gravel and clay overlying Shady limestone. Iron Mountain is formed by the entire Cambrian quartzite series faulted up on top of the Shady limestone. The portion the of the gap shows a double crest form by the Snowbird formation and the Cochran conglomerate, a depression of Hiwassee slate lying between. The knob seen through the gap is formed by Erwin quartzite. Carter County, Tennessee. 1907. Figure 12 in U.S. Geological Survey. Folio 151. 1907. #1:/Tennessee-Folio 151/kei00437 ID. Keith, A. 437 Valley of East Tennessee bear Jonesboro, looking southeast. This valley is composed of many rounded hills, characteristic of Knox dolomite, with red clay soil and some chert. The summits rise in general to elevations of 1,700 to 1,800 feet and are remnants of an ancient plain that extends to the foot Cherokee Mountain, in the background. This mountain rises abruptly about 1,000 feet above the limestone hills. Beyond, a peak of Buffalo Mountain and the high dome of Unaka Mountain are visible. Washington County, Tennessee. 1907. Figure 16 in U.S. Geological Survey. Folio 151. 1907. #1:/Tennessee-Folio 151/kei00439 ID. Keith, A. 439 Roan Mountain, from point one-fourth mile east of Roan Mountain Station, looking S. 20 degrees W. The hills in the foreground and the distant spurs of Roan Mountain are composed of Cranberry granite. The broad, rounded summits of the mountains are characteristic of the Roan gneiss. The highest summit is 4.000 feet above Doe River, in the foreground. Carter County, Tennessee. 1907. Figure 5 in U.S. Geological Survey. Folio 151. 1907. #1:/North Carolina-Folio 151/kei00443 ID. Keith, A. 443 Toe River and its dissected plateau, 1 mile north of Toecane, looking S. 70 degrees W. The point of view is nearly 1,000 feet above plateau summits, which lie in a plain about 2,600 feet above sea level. The large streams have cut canyons into the plateau 400 to 600 feet deep. Both the plateau and bordering mountains were worn from a complex mass of granites and gneisses irrespective of their composition and structure. Mitchell County, North Carolina. 1897. Figure 17 in U.S. Geological Survey. Folio 151. 1907. #1:/Arizona-Folio 112/rfl00393 ID. Ransome, F.L. 393 The Mount Martin Paleozoic section on the northeast slope of Escabrosa Ridge, west of Bisbee. Cochise County, Arizona. 1902. Figure 4, with sketch at bottom, showing more details in U.S. Geological Survey. Folio 112. 1914. #1:/South Dakota-Folio 108/sgw00875 ID. Stose, G.W. 875 Serrated ridge due to steep dipping Greenhorn limestone, southeast of Maitland, looking east. Lawrence County, South Dakota. 1903. Figure 9 in U.S. Geological Survey. Folio 108. 1904. #1:/Alabama-Folio 175/butc0306 ID. Butts, C. 306 Conasauga limestone near the Louisville and Nashville railroad 1 mile south of Boyles Gap, looking northeast. Jefferson County, Alabama. 1910. Plate 4 in U.S. Geological Survey. Folio 175. 1910. #1:/Alabama-Folio 175/butc0332 ID. Butts, C. 332 Evenly bedded Fort Payne chert in Louisville and Nashville railroad cut at Dale Gap, near Village Springs, looking north. Jefferson County, Alabama. 1910. Plate 9 in U.S. Geological Survey. Folio 175. 1910. #1:/Alabama-Folio 175/butc0423 ID. Butts, C. 423 Ruffner No. 1 mine 1mile north of Irondale; Big seam of iron ore above and Irondale seam 20 feet below. Looking north. Jefferson County, Alabama. 1910. Plate 6 in U.S. Geological Survey. Folio 175. 1910. #1:/Alabama-Folio 175/butc0441 ID. Butts, C. 441 Shale with thin layers of chert in the Conasauga limestone, exposed on Twenty-Fourth St., Bessemer, looking south. Jefferson County, Alabama. 1910. Plate 1 in U.S. Geological Survey. Folio 175. 1910. #1:/Alabama-Folio 175/butc0481 ID. Butts, C. 481 Ferruginous sandstone and shale of the Clinton formation overlying the big seam of iron ore at Spaulding, looking east. Jefferson County, Alabama. 1910. Plate 5 in U.S. Geological Survey. Folio 175. 1910. #1:/Alabama-Folio 175/butc0484 ID. Butts, C. 484 Ketona dolomite member of the Knox dolomite in quarry at north Birmingham, looking south. Jefferson County, Alabama. 1910. Plate 2 in U.S. Geological Survey. Folio 175. 1910. #1:/Alabama-Folio 175/butc0492 ID. Butts, C. 492 Dolomite quarry for flux, Thomas, looking north. Jefferson County, Alabama. 1910. Plate 12 in U.S. Geological Survey. Folio 175. 1910. #1:/Alabama-Folio 175/butc0494 ID. Butts, C. 494 In Louisville and Nashville railroad cut in Lone Pine Gap, Red Mountain at Birmingham, looking east. Fort Payne chert (at right) Chattanooga shale (dark streak near middle) and probably Frog Mountain sandstone below, resting unconformably upon Clinton shale (at the extreme left). Jefferson County, Alabama. 1910. Plate 7 in U.S. Geological Survey. Folio 175. 1910. #1:/Alabama-Folio 175/butc0549 ID. Butts, C. 549 Characteristic hilly topography of the Knox dolomite areas, crest of Red Mountain, composed of the Clinton formation in the distance, looking east from highway about 1 mile south Pinson. Jefferson County, Alabama. 1910. Plate 3 in U.S. Geological Survey. Folio 175. 1910. #1:/Alabama-Folio 175/butc549a ID. Butts, C. 549a Characteristic hilly topography of the Knox dolomite areas, crest of Red Mountain, composed of the Clinton formation in the distance, looking east from highway about 1 mile south Pinson. Jefferson County, Alabama. 1910. Plate 3 in U.S. Geological Survey. Folio 175. 1910. #1:/Alabama-Folio 175/butc0540 ID. Butts, C. 540 Dike like outcrop of vertical Hartselle sandstone member 1.5 miles east of Newcastle, looking north. This feature extends north to Pinson and is called Rocky Row. Jefferson County, Alabama. 1910. Plate 10 in U.S. Geological Survey. Folio 175. 1910. #1:/Pennsylvania-Folio 172/butc0564 ID. Butts, C. 564 Looking south from Cobham Hill over surface of the dissected Harrisburg peneplain. Shows the even skylines due to peneplanation. Warren County, Pennsylvania. 1909. Figure 4 in U.S. Geological Survey. Folio 172. 1910. #1:/Pennsylvania-Folio 172/butc564a ID. Butts, C. 564a Looking south from Cobham Hill over surface of the dissected Harrisburg peneplain. Shows the even skylines due to peneplanation. Warren County, Pennsylvania. 1909. Figure 4 in U.S. Geological Survey. Folio 172. 1910. #1:/Pennsylvania-Folio 172/butc564b ID. Butts, C. 564b Looking south from Cobham Hill over surface of the dissected Harrisburg peneplain. Shows the even skylines due to peneplanation. Warren County, Pennsylvania. 1909. Figure 4 in U.S. Geological Survey. Folio 172. 1910. #1:/Pennsylvania-Folio 172/butc0615 ID. Butts, C. 615 Terrace deposits of Kansan or pre-Kansan age at quarry in the eastern part of Warren, finely laminated and cross-bedded sand, clay and small gravel, overlain by coarse gravel and boulder deposits. Depth of cut 100 feet. Warren County, Pennsylvania. 1909. Figure 13 in U.S. Geological Survey. Folio 172. 1910. #1:/Pennsylvania-Folio 172/butc615a ID. Butts, C. 615a Terrace deposits of Kansan or pre-Kansan age at quarry in the eastern part of Warren, finely laminated and cross-bedded sand, clay and small gravel, overlain by coarse gravel and boulder deposits. Depth of cut 100 feet. Warren County, Pennsylvania. 1909. Figure 13 in U.S. Geological Survey. Folio 172. 1910. #1:/Pennsylvania-Folio 172/butc0617 ID. Butts, C. 617 Up Indian Hollow from a point near Warren, showing rounded shale slopes and terrace on Snyder Hill made by the lower ferruginous conglomerate member of the Knapp formation. Mercer County, Pennsylvania. 1909. Figure 3 in U.S. Geological Survey. Folio 172. 1910. #1:/Colorado-Folio 171/ccw00323 ID. Cross, C.W. 323 Looking up Animas Valley from east side near Carson Creek, Durango quadrangle, show the long line of Hermosa Cliffs in the Engineer Mountains quadrangle in relation to the broad Animas Valley. The ledge and bench of Ouray limestone are visible at the base of the cliffs. On the right is the Pre-Cambrian area; the gorge of the Animas near its mouth appears on the left. La Plata County, Colorado. 1909. Figure 14 in U.S. Geological Survey. Folio 171. 1909. #1:/Colorado-Folio 171/ccw00361 ID. Cross, C.W. 361 Western San Juan Mountains from Blackhawk Peak shows the character of the country between the San Juan Mountains, in the distance, and the Rico Mountains. On the right is Hermosa Peak; in the Section Point the white La Plata sandstone and red Dolores beds dip away from the point of view under the influence of the Rico Mountain uplift. Dolores County, Colorado. 1909. Figure 5 in U.S. Geological Survey. Folio 171. 1909. #1:/Colorado-Folio 171/ccw00362 ID. Cross, C.W. 362 Looking eastward across Barlow Creek toward Flattop, the western peaks of the San Juan Mountains and Hermosa Peak. Barlow Creek valley in the foreground; beyond it, on the left, the porphyry laccolith of Flattop, capped by Cretaceous beds; the highest summit, in the distance, is Grizzly Peak, carved in a monzonite stock; to the right of it is Sliderock Ridge, with a great rock stream of quartz trachyte debris. On the right is Hermosa Peak the upper part of which is intrusive monzonite porphyry; the lower slopes are of quartz trachyte belonging to a sill that extends from the ridge on the extreme right to the cliffs in the middle ground. On the left of Hermosa Peak is the bare peak of Engineer Mountain, and the quartzite peaks of the Needle Mountains. Dolores County, Colorado. 1909. Figure 6 in U.S. Geological Survey. Folio 171. 1909. #1:/Colorado-Folio 171/ccw00363 ID. Cross, C.W. 363 Looking eastward across Barlow Creek toward Flattop, the western peaks of the San Juan Mountains and Hermosa Peak. Barlow Creek valley in the foreground; beyond it, on the left, the porphyry laccolith of Flattop, capped by Cretaceous beds; the highest summit, in the distance, is Grizzly Peak, carved in a monzonite stock; to the right of it is Sliderock Ridge, with a great rock stream of quartz trachyte debris. On the right is Hermosa Peak the upper part of which is intrusive monzonite porphyry; the lower slopes are of quartz trachyte belonging to a sill that extends from the ridge on the extreme right to the cliffs in the middle ground. On the left of Hermosa Peak is the bare peak of Engineer Mountain, and the quartzite peaks of the Needle Mountains. Dolores County, Colorado. 1909. Figure 6 in U.S. Geological Survey. Folio 171. 1909. #1:/Colorado-Folio 171/ccw00367 ID. Cross, C.W. 367 Hermosa cliffs seen from lily pond in area now covered by Ignacio reservoir, shows relation of the broad bench occupied by Ignacio Reservoir to the scarp of Hermosa Cliffs, which rise 1800 feet above the bench. La Plata County, Colorado. 1909. Figure 4 in U.S. Geological Survey. Folio 171. 1909. #1:/Colorado-Folio 171/ccw00368 ID. Cross, C.W. 368 Engineer Mountain and Potato Hill from ridge north of Little Cascade Creek. Looking diagonally across the canyon of Cascade Creek toward Potato Hill on the right and Engineer Mountain on the left. On the extreme right the slope rises to the West Needle Mountains. The west lobe of the Animas Glacier produced the roche moutonees forms in the middle and foregrounds. La Plata County, Colorado. 1909. Figure 13 in U.S. Geological Survey. Folio 171. 1909. #1:/Colorado-Folio 171/ccw00873 ID. Cross, C.W. 873 Hornblende schist irregularly intruded by Twilight granite, Little Cascade Creek. La Plata County, Colorado. 1909. Figure 10 in U.S. Geological Survey. Folio 171. 1909. #1:/Colorado-Folio 171/ccw00876 ID. Cross, C.W. 876 Hornblende schist split into slabs by Twilight granite, Little Cascade Creek. La Plata County, Colorado. 1909. Figure 11 in U.S. Geological Survey. Folio 171. 1909. #1:/Wyoming-Folio 173/dnh01135 ID. Darton, N.H. 1135 Laramie Plains looking southwest from ridge 2 miles north of Mandel, Little Laramie river in the foreground, Sheep Mountain to left of center. Albany County, Wyoming. 1905. Figure 4 in U.S. Geological Survey. Folio 173. 1910. #1:/Wyoming-Folio 173/dnh01140 ID. Darton, N.H. 1140 Limestone front ridge on east side of Laramie Mountains west of Horse Creek Station, looking north, high ridges Casper formation; Red valley and low ridge of Cloverly sandstone to right. Laramie County, Wyoming. 1909. Figure 10 in U.S. Geological Survey. Folio 173. 1910. #1:/Wyoming-Folio 173/dnh01302 ID. Darton, N.H. 1302 Cross-bedded sandstone in the Casper formation, Sand Creek, Albany County, Wyoming. 1909. Figure 9 in U.S. Geological Survey. Folio 173. 1910. #1:/Wyoming-Folio 173/dnh01303 ID. Darton, N.H. 1303 Monument of cross-bedded red sandstone of the Casper formation at Red Butte, the monument is about 20 feet high. Albany County, Wyoming. 1909. Figure 8 in U.S. Geological Survey. Folio 173. 1910. #1:/Wyoming-Folio 173/dnh01304 ID. Darton, N.H. 1304 Chimney Rocks on south bank of Horse Creek, east of Davis Ranch, composed of Fox Hills sandstone. Laramie County, Wyoming. 1909. Figure 10 in U.S. Geological Survey. Folio 173. 1910. #1:/Wyoming-Folio 173/dnh01305 ID. Darton, N.H. 1305 Steamboat Rock composed of massive sandstone in the Chugwater formation. Twenty- six miles southwest of Laramie, looking north. Laramie County, Wyoming. 1905. Figure 6 in U.S. Geological Survey. Folio 173. 1910. #1:/Colorado-Folio 171/howe0009 ID. Howe, E. 9 Hornblende schist irregularly intruded by Twilight granite, Little Cascade Creek. La Plata County, Colorado. 1909. Figure 12 in U.S. Geological Survey. Folio 171. 1909. #1:/Colorado-Folio 171/howe0016 ID. Howe, E. 16 Scarp of Hermosa formation east of Engineer Mountain, illustrates the manner in which massive limestone and sandstone alternate with soft shale, looking south. Pass of Coalbank hill on the right. Mountains near Silverton in the distance. San Juan County, Colorado. 1909. Figure 2 in U.S. Geological Survey. Folio 171. 1909. #1:/New Jersey-Folio 157/ijp00117 ID. Iddings, J.P. 117 Basalt columns of first Watchung sheet, O'Rourke's quarry, west of Orange, the lower portion of the basalt, which rests on sandstone, presents large vertical columns; the upper portion consists of small radial columns. Essex County, New Jersey. April 24, 1902. Figure 17 in U.S. Geological Survey. Folio 83. 1902 Figure 30 in U.S. Geological Survey. Folio 157. 1908. #1:/New York-Folio 169/kem00002 ID. Kindle, E.M. 2 Genesee shale, east shore of Lake Cayuga, Schuyler County New York 1909. Figure 14 in U.S. Geological Survey. Folio 169. 1909. #1:/New York-Folio 169/kem00005 ID. Kindle, E.M. 5 Natural exposure of Sherburne flagstone member, east shore of Lake Cayuga, Schuyler County New York 1909. Figure 14 in U.S. Geological Survey. Folio 169. 1909. #1:/New York-Folio 169/kem00014 ID. Kindle, E.M. 14 Watkins Glen, showing a swell in the narrow gorge. Schuyler County New York 1909. Figure 24 in U.S. Geological Survey. Folio 169. 1909. #1:/New York-Folio 169/kem00016 ID. Kindle, E.M. 16 Watkins Glen, a narrow, tortuous gorge in the Portage formation. Schuyler County New York 1909. Figure 23 in U.S. Geological Survey. Folio 169. 1909. #1:/New York-Folio 169/kem00018 ID. Kindle, E.M. 18 Upper portion of Watkins Glen. Schuyler County New York 1909. Figure 25 in U.S. Geological Survey. Folio 169. 1909. #1:/New York-Folio 169/kem00021 ID. Kindle, E.M. 21 Submarine unconformity in Sherburne flagstone member, Cathedral Hall, Watkins. Schuyler County New York 1909. Figure 19 in U.S. Geological Survey. Folio 169. 1909. #1:/New York-Folio 169/kem00025 ID. Kindle, E.M. 25 Small fault offsetting sandstone bed in Enfield shale member, Glen Creek. Schuyler County New York 1909. Figure 22 in U.S. Geological Survey. Folio 169. 1909. #1:/New York-Folio 169/kem00032 ID. Kindle, E.M. 32 Flagstones in the Portage formation; quarry south of Watkins. The quarried blocks are delimited by joint planes. Schuyler County New York 1909. Figure 15 in U.S. Geological Survey. Folio 169. 1909. #1:/New York-Folio 169/kem00036 ID. Kindle, E.M. 36 Mouth of Excelsior Glen, showing v-shaped channel in Ithaca shale member. Schuyler County New York 1909. Figure 26 in U.S. Geological Survey. Folio 169. 1909 #1:/Pennsylvania-Folio 174/pwc00093 ID. Phalen, W.C. 93 Incised meander of Little Conemaugh River at the viaduct 1 mile southeast of Mineral Point, looking southwest, the river flows from the left bank of the high hill in the middle ground to the right of the view. Cambria County, Pennsylvania. 1909. Figure 3 in U.S. Geological Survey. Folio 174. 1910. #1:/Pennsylvania-Folio 174/pwc00094 ID. Phalen, W.C. 94 Incised meander of Little Conemaugh River at the viaduct 1 mile southeast of Mineral Point, looking southwest, the river flows from the left bank of the high hill in the middle ground to the right of the view. Cambria County, Pennsylvania. 1909. Figure 3 in U.S. Geological Survey. Folio 174. 1910. #1:/Pennsylvania-Folio 174/pwc00103 ID. Phalen, W.C. 103 Loyalhanna limestone member of the Pocono formation at Mineral Point, in the Little Conemaugh River gorge, showing the cross-bedded character of the rock brought out by weathering. Cambria County, Pennsylvania. 1909. Figure 4 in U.S. Geological Survey. Folio 174. 1910. #1:/Texas-Folio166/rgb00046 ID. Richardson, G.B. 46 Hill of syenite porphyry Hueco Tanks rising abruptly from Quaternary deposits of Hueco Bolson. El Paso County, Texas. 1908. Figure 15 in U.S. Geological Survey. Folio 166. 1909. #1:/Texas-Folio166/rgb00103 ID. Richardson, G.B. 103 Faulted sand and clay of the Bolson deposits at the north end of Virginia Street, El Paso, El Paso County, Texas. 1908. Figure 13 in U.S. Geological Survey. Folio 166. 1909. #1:/Texas-Folio166/rgb00168 ID. Richardson, G.B. 168 South end of Franklin Mountains from El Paso, showing the abrupt termination of the range, its westward dip slope and terraced bolson deposits on each side. El Paso County, Texas. 1908. Figure 10 in U.S. Geological Survey. Folio 166. 1909 #1:/Pennsylvania-Folio 170/sgw00150 ID. Stose, G.W. 150 Jordan Knob synclinal mountain from Fort Loudon, this western limb of the syncline is shown terminating in Jordan Knob in the center of the picture. The crest of the mountain is composed of Tuscarora sandstone; the clear fields on the slopes are of Martinsburg shale. Franklin County, Pennsylvania. 1909. Figure 7 in U.S. Geological Survey. Folio 170. 1909. #1:/Pennsylvania-Folio 170/sgw00154 ID. Stose, G.W. 154 Cove Mountain and the Mercersburg limestone valley seen from Dunns Gap road, on the slope of Cross Mountain. The comb-like ridge on the left is Cove Mountain. Parnell and Jordan synclinal ridges are in the distance. Franklin County, Pennsylvania. 1909. Figure 8 in U.S. Geological Survey. Folio 170. 1909. #1:/Pennsylvania-Folio 170/sgw00158 ID. Stose, G.W. 158 Schooley peneplain preserved on Cross Mountain. The level-topped ridge in the middle distance is Cross Mountain. At the right is the lower ridge of Cove Mountain at the left is Two Top Mountain. The foreground represents the Somerville peneplain preserved on Martinsburg shale. Franklin County, Pennsylvania. 1909. Figure 12 in U.S. Geological Survey. Folio 170. 1909. #1:/Pennsylvania-Folio 170/sgw00162 ID. Stose, G.W. 162 Schooley peneplain preserved on the North Mountain Ridges; Parnell Knob at left. Foreground and middle ground are part of the dissected shale plateau of the Harrisburg peneplain, from a point 3.5 miles southwest of Chambersburg. Franklin County, Pennsylvania. 1909. Figure 6 in U.S. Geological Survey. Folio 170. 1909. #1:/Pennsylvania-Folio 170/sgw00163 ID. Stose, G.W. 163 Schooley peneplain preserved on the North Mountain Ridges; Parnell Knob at left. Foreground and middle ground are part of the dissected shale plateau of the Harrisburg peneplain, from a point 3.5 miles southwest of Chambersburg. Franklin County, Pennsylvania. 1909. Figure 6 in U.S. Geological Survey. Folio 170. 1909. #1:/Pennsylvania-Folio 170/sgw00164 ID. Stose, G.W. 164 Schooley peneplain preserved on the North Mountain Ridges; Parnell Knob at left. Foreground and middle ground are part of the dissected shale plateau of the Harrisburg peneplain, from a point 3.5 miles southwest of Chambersburg. Franklin County, Pennsylvania. 1909. Figure 6 in U.S. Geological Survey. Folio 170. 1909. #1:/Pennsylvania-Folio 170/sgw00304 ID. Stose, G.W. 304 Chambersburg limestone at Chambersburg. The planes dipping steeply to the left are the bedding ; those dipping gently to the right are the argillaceous partings that give rise to "cobbly" fragments on weathering. Franklin County, Pennsylvania. 1909. Figure 9 in U.S. Geological Survey. Folio 170. 1909. #1:/Pennsylvania-Folio 170/sgw00306 ID. Stose, G.W. 306 Characteristic thin bedded limestone of the Chambersburg formation, in railroad cut 2 miles southwest of Marion. Indiana County, Pennsylvania. 1909. Figure 10 in U.S. Geological Survey. Folio 170. 1909. #1:/Pennsylvania-Folio 170/sgw00307 ID. Stose, G.W. 307 Syncline in Martinsburg shale 3 miles northeast of Upton, shows the cleavage planes radiating from the center of the fold. Franklin County, Pennsylvania. 1909. Figure 11 in U.S. Geological Survey. Folio 170. 1909. #1:/Pennsylvania-Folio 170/sgw00315 ID. Stose, G.W. 315 Irregular argillaceous and siliceous banding in the lower beds of the Beekmantown limestone 1 mile southwest of Aqua. Franklin County, Pennsylvania. 1909. Figure 16 in U.S. Geological Survey. Folio 170. 1909. #1:/Pennsylvania-Folio 170/sgw00348 ID. Stose, G.W. 348 Crinkled siliceous banding in the Conocochegue limestone, left in strong relief by weathering. Pennsylvania. 1909. Figure 15 in U.S. Geological Survey. Folio 170. 1909. #1:/Pennsylvania-Folio 170/sgw00399 ID. Stose, G.W. 399 "Edgewise" conglomerate in the Stonehenge member of the Beekmantown limestone 4 miles southeast of Greencastle. Franklin County, Pennsylvania. 1909. Figure 17 in U.S. Geological Survey. Folio 170. 1909. #1:/Pennsylvania-Folio 170/sgw00455 ID. Stose, G.W. 455 "Cauiflower" chert from the upper part of Beekmantown limestone in the Mercersburg quadrangle Franklin County, Pennsylvania. 1909. Figure 14 in U.S. Geological Survey. Folio 170. 1909. #1:/Pennsylvania-Folio 170/sgw00456 ID. Stose, G.W. 456 Rosette chert from the top layers of the Beekmantown limestone occurs in both the Chambersburg and the Mercersburg quadrangle. Franklin County, Pennsylvania. 1909. Figure 18 in U.S. Geological Survey. Folio 170. 1909. #1:/New York-Folio 169/sgw00784 ID. Stose, G.W. 784 Sandstone lens in Ithaca shale member, near Messengerville, Cortland County, New York. 1909. Figure 18 in U.S. Geological Survey. Folio 169. 1909. #1:/New York-Folio 169/sgw00785 ID. Stose, G.W. 785 Large concretions with fossil band on periphery, in Chemung formation, Rosstown. Chemung County, New York. 1909. Figure 21 in U.S. Geological Survey. Folio 169. 1909. #1:/New York-Folio 169/sgw00786 ID. Stose, G.W. 786 Postglacial gorge of Sixmile Creek above Ithaca, the stream flows through the gap from one section of old buried valley to another. Site for dam and reservoir under construction. Tompkins County, New York. 1909. Figure 36 in U.S. Geological Survey. Folio 169. 1909. #1:/New Jersey-Folio 157/sgw00943 ID. Stose, G.W. 943 Fault in sandstone of Newark group in railroad cut west of Arlington, looking north; shows broad zone of breccia along the fault plane. Hudson County, New Jersey. 1902. Figure 31 in U.S. Geological Survey. Folio 157. 1908. #1:/New Jersey-Folio 162/sgw00944 ID. Stose, G.W. 944 The Pensauken formation resting on the Cretaceous at Hylton's pits, on Pensauken Creek near Palmyra, the structure of the Pensauken is characteristic of the formation in general. Burlington County, New Jersey. 1902. Figure 15 in U.S. Geological Survey. Folio 162. 1909. #1:/New Jersey-Folio 162/sgw00945 ID. Stose, G.W. 945 Sand in the Pensauken formation, cemented by iron oxide, 2 miles southeast of Swedesboro, Gloucester County, New Jersey. 1902. Figure 17 in U.S. Geological Survey. Folio 162. 1909. #1:/New Jersey-Folio 162/sgw00946 ID. Stose, G.W. 946 Section of Bridgetown formation at Irish Hill, 1.5 miles southeast of Bellmawr, Camden County, New Jersey. 1902. Figure 14 in U.S. Geological Survey. Folio 157. 1908. #1:/New York-Folio 169/sgw00948 ID. Stose, G.W. 948 Moraine on east side of Cayuga inlet valley just south of the mouth of Butternut Creek, shows characteristic hummocky surface of morainal deposits. Tompkins County, New York. 1909. Figure 27 in U.S. Geological Survey. Folio 169. 1909. #1:/New Jersey-Folio 157/wil00366 ID. Willis, B. 366 Quarry near upper Montclair, looking northwest, Watchung basalt lying unconformably on Newark sandstone. The sandstone is both bedded and jointed; the basalt is irregularly jointed and columnar. Essex County, New Jersey. April 24, 1902. Figure 27 in U.S. Geological Survey. Folio 157. 1908. #1:/Maine-Folio 192/bes00112 ID. Bastin, E.S. 112 Surface of lower diabase flow of Perry formation; on shore 1 mile north of Perry; shows abundance of calcite amygdules. Washington County, Maine. 1913. Plate 9 in U.S. Geological Survey. Folio 192. 1914. #1:/Maine-Folio 192/bes00122 ID. Bastin, E.S. 122 Coarse volcanic tuff of gray rhyolite of Eastport formation: shore of Moose Island, due south of Carlow Island. Washington County, Maine. 1913. Plate 7 in U.S. Geological Survey. Folio 192. 1914. #1:/Maine-Folio 192/bes00129 ID. Bastin, E.S. 129 Typical shales of the upper part of the Eastport formation cut at the right by a dike of red rhyolite, northwest end of Carlow Island. Washington County, Maine. 1913. Plate 3 in U.S. Geological Survey. Folio 192. 1914. #1:/Maine-Folio 192/bes00134 ID. Bastin, E.S. 134 Boulder strewn terrace of sand and clay bordering the tidal flat show in Bastin 135, probably formed on a tidal flat when the land stood at lower level. Washington County, Maine. 1913. Plate 14 in U.S. Geological Survey. Folio 192. 1914. #1:/Maine-Folio 192/bes00135 ID. Bastin, E.S. 135 Boulder strewn tidal flat, east shore of Lubec Neck. Washington County, Maine. 1913. Plate 15 in U.S. Geological Survey. Folio 192. 1914. #1:/Maine-Folio 192/bes00136 ID. Bastin, E.S. 136 Rock outcrops flanked by flats of glacio-marine gravels, northern part city of Eastport. The form of the outcrops is suggestive of wave erosion. Washington County, Maine. 1913. Plate 13 in U.S. Geological Survey. Folio 192. 1914. #1:/Maine-Folio 192/bes00159 ID. Bastin, E.S. 159 Hill northwest of Johnson cove, view looking east, showing the cliff-like profile of the south end of the hill, due possibly to marine erosion. The cliff is fronted on the south by gravels with "foreset" beds. Washington County, Maine. 1913. Plate 12 in U.S. Geological Survey. Folio 192. 1914. #1:/Maine-Folio 192/bes00161 ID. Bastin, E.S. 161 Gravel pit at McCoy farm, near Carryingplace Cove, Moose Island, looking east. The gravels are about 30 feet thick and overlie marine clays. They show inclined structure typical of deposition in standing water. The incline beds dip 30 – 35 degrees north. Washington County, Maine. 1913. Plate 11 in U.S. Geological Survey. Folio 192. 1914. #1:/Maine-Folio 192/bes00165 ID. Bastin, E.S. 165 Granite boulders from Perry conglomerate sliced during the folding and minor faulting of the formation and the fragments recemented: shore northwest of Pigeon Hill, Perry. Washington County, Maine. 1913. Plate 8 in U.S. Geological Survey. Folio 192. 1914. #1:/Maine-Folio 192/bes00166 ID. Bastin, E.S. 166 Flow breccia structure in andesite of the Edmund formation, near point where Pembroke- Dennysville road crosses Wilson Stream. Fragments of highly porphyritic andesite are inclosed in a dark-red aphanitic matrix. Washington County, Maine. 1913. Plate 6 in U.S. Geological Survey. Folio 192. 1914. #1:/Texas-Folio 183/pai00904 ID. Paige, S. 904 Enchanted Rock in southwestern part of Llano quadrangle, looking 45 degrees W. from most easterly peak in-group, shows exfoliation of the granite parallel to the surface. Llano County, Texas. 1912. Plate 10 in U.S. Geological Survey. Folio 183. 1912. #1:/Texas-Folio 183/pai00910 ID. Paige, S. 910 Folded and faulted Pre-Cambrian banded gneiss, illustrates small faults accompanied by flow movement, the layering above and below being undisturbed. Llano County, Texas. 1912. Plate 2 in U.S. Geological Survey. Folio 183. 1912. #1:/Texas-Folio 183/pai00913 ID. Paige, S. 913 Schist fragment in Pre-Cambrian granite, shows absorption of the schist along its edge. . Llano County, Texas. 1912. Plate 5 in U.S. Geological Survey. Folio 183. 1912. #1:/Texas-Folio 183/pai00920 ID. Paige, S. 920 Chert bearing, Magnesian limestone of the Ellenburger formation in cliff: on Honey Creek in Riley Mountain; southeast of Llano. Llano County, Texas. May 1912. Plate 9 in U.S. Geological Survey. Folio 183. 1912. #1:/Texas-Folio 183/pai00932 ID. Paige, S. 932 Cretaceous conglomerate at the base of the Trinity formation resting on horizontally bedded carboniferous (Smithwick) shale; east bank of Colorado River, about 3 miles north of south edge of Burnet quadrangle. Burnet County, Texas. 1912. Plate 6 in U.S. Geological Survey. Folio 183. 1912. #1:/Texas-Folio 183/pai00935 ID. Paige, S. 935 Characteristic bench (in foreground) produced by erosion of Walnut clay at base of Comanche Peak limestone, minor bench in background in Comanche Peak limestone. Texas. 1912. Plate 4 in U.S. Geological Survey. Folio 183. 1912. #1:/Texas-Folio 183/pai00936 ID. Paige, S. 936 Characteristic benches and grass covered plains on the Trinity formation in the northeastern part of the Burnet quadrangle, Burnet County, Texas. 1912. Plate 11 in U.S. Geological Survey. Folio 183. 1912 #1:/Texas-Folio 183/pai00938 ID. Paige, S. 938 Falls at mouth of Fall Creek in northwestern part of Burnet quadrangle, the falls go over Ellenburger limestone which is covered with travertine deposited by the stream. San Saba County, Texas. 1912. Plate 7 in U.S. Geological Survey. Folio 183. 1912. #1:/Texas-Folio 183/pai00940 ID. Paige, S. 940 Glauconitic sandstone of Cap Mountain formation resting by overlap on Pre-Cambrian granite, on Beaver Creek, in the northwestern part of Burnet quadrangle. Burnet County, Texas. 1912. Plate 1 in U.S. Geological Survey. Folio 183. 1912. #1:/Texas-Folio 183/pai00942 ID. Paige, S. 942 "Edgewise" conglomerate of shale pebbles (in the rock at the left) and boulder like masses of calcareous mud, characteristic of the upper part of the Wilberns formation. Burnet County, Texas. 1912. Plate 8 in U.S. Geological Survey. Folio 183. 1912. #1:/Texas-Folio 183/pai00948 ID. Paige, S. 948 Ellenburger limestone in the cliffs, faulted against carboniferous (Smithwick) shale (beneath pond in foreground) at Morman Mill, 8 miles south of Burnet. Edge of water along the bluff marks line of fault plane. Burnet County, Texas. 1912. Plate 3 in U.S. Geological Survey. Folio 183. 1912. #1:/Geogia-Folio 187/pwc00113 ID. Phalen, W.C. 113 Murphy marble in a quarry at Whitestone in Talona Valley, just west of Ellijay quadrangle, the marble contains magnesium carbonate, which is extracted for use in the manufacture of magnesium sulphates and carbonic acid. Gilmer County, Georgia 1912. Figure 7 in U.S. Geological Survey. Folio 187. 1913. #1:/Geogia-Folio 187/pwc00114 ID. Phalen, W.C. 114 Murphy marble in a quarry at Whitestone in Talona Valley, just west of Ellijay quadrangle, the marble contains magnesium carbonate, which is extracted for use in the manufacture of magnesium sulphates and carbonic acid. Gilmer County, Georgia 1912. Figure 7 in U.S. Geological Survey. Folio 187. 1913. #1:/Geogia-Folio 187/pwc00115 ID. Phalen, W.C. 115 Whitestone fault in a quarry at Whitestone in Talona Valley west of the Ellijay quadrangle, in the upper part of the picture the overthrust Nantahala slate is shown resting on the Murphy marble. Gilmer County, Georgia 1912. Figure 6 in U.S. Geological Survey. Folio 187. 1913. #1:/West Virginia-Folio 179/sgw00224 ID. Stose, G.W. 224 Wall like outcrop of Keefer sandstone member of the McKenzie formation: top of knoll at Fluted Rocks, east Great Cacapon. Morgan County, West Virginia. 1911. Plate 5 in U.S. Geological Survey. Folio 179. 1912. #1:/West Virginia-Folio 179/sgw00228 ID. Stose, G.W. 228 Purlane sandstone cliffs, exposed on the Devils Nose by Meadow Branch near north end of Sleepy Creek Mountain, the beds are nearly horizontal in the bottom of the syncline. Morgan County, West Virginia. 1911. Plate 6 in U.S. Geological Survey. Folio 179. 1912. #1:/West Virginia-Folio 179/sgw00229 ID. Stose, G.W. 229 Potomac River Gap in Sideling Hill, from Prospect Rock on Cacapon Mountain, a remnant of the Harrisburg peneplain forms the terrace to the left of the gap. Tonoloway Ridge on the left and long oxbow of Great Cacapon River in the middle foreground. Hampshire County, West Virginia. 1911. Plate 2 in U.S. Geological Survey. Folio 179. 1912. #1:/West Virginia-Folio 179/sgw00230 ID. Stose, G.W. 230 Eades Fort, on Great Cacapon River, the river has cut into these hard sandstone rocks and separated this mass from the main body of Tuscarora sandstone forming Cacapon Mountain at the right. Morgan County, West Virginia. 1911. Plate 8 in U.S. Geological Survey. Folio 179. 1912. #1:/West Virginia-Folio 179/sgw00244 ID. Stose, G.W. 244 The 800-foot terrace west of Woodmont, looking west, Sideling Hill gap in distance. The terrace is the remnant of the Harrisburg peneplain shown in Stose, 229. Morgan County, West Virginia. 1911. Plate 3 in U.S. Geological Survey. Folio 179. 1912. #1:/West Virginia-Folio 179/sgw00246 ID. Stose, G.W. 246 Potomac River and level topped ridges near Magnolia, from Sideling Hill; the ridges preserve remnants of the Harrisburg peneplain. Town Hill in the distance. Morgan County, West Virginia. 1911. Plate 4 in U.S. Geological Survey. Folio 179. 1912. #1:/West Virginia-Folio 179/sgw00257 ID. Stose, G.W. 257 Cross-bedding in the sandstones of the Rockwell formation exposed in Meadow Branch at north end of Sleepy Creek Mountain. Morgan County, West Virginia. 1911. Plate 19 in U.S. Geological Survey. Folio 179. 1912. #1:/West Virginia-Folio 179/sgw00283 ID. Stose, G.W. 283 Details of the structure in the Tuscarora sandstone cliff at Edes Fort west of Cacapon Mountain; horizontal beds at the right connect the minor overturned anticline at the left with the major anticline of Cacapon Mountain to the right of the view, as shown in Stose, 230. Morgan County, West Virginia. 1911. Plate 7 in U.S. Geological Survey. Folio 179. 1912. #1:/West Virginia-Folio 179/sgw00286 ID. Stose, G.W. 286 Recently formed cut-off on Sleepy Creek at Johnsons Mill, looking downstream through the rock cut over which the stream is now falling into the ponded waters of the old channel. Morgan County, West Virginia. 1911. Plate 20 in U.S. Geological Survey. Folio 179. 1912. #1:/Maryland-Folio 179/sgw00330 ID. Stose, G.W. 330 Closely folded thin-bedded crystalline limestone and shale of the McKenzie formation. In the Western Maryland Railway cut opposite Great Cacapon, looking north. Washington County, Maryland. 1911. Plate 12 in U.S. Geological Survey. Folio 179. 1912. #1:/Maryland-Folio 179/sgw00332 ID. Stose, G.W. 332 Peculiar markings resembling burrow in the fine mud rock of the Wills Creek shale, exposed in the Western Maryland Railway cut 1 mile east of Great Cacapon. Narrow light colored bands or filled channels lead diagonally downward across the mud-rock layer. Washington County, Maryland. 1911. Plate 18 in U.S. Geological Survey. Folio 179. 1912. #1:/Maryland-Folio 179/sgw00471 ID. Stose, G.W. 471 Sun-cracked calcareous beds of the Wills Creek shale, at mouth of cemented-rock tunnel, Potomac, 20 miles west of this area. Allegany County, Maryland. 1911. Plate 16 in U.S. Geological Survey. Folio 179. 1912. #1:/Colorado-Folio 186/sgw00478 ID. Stose, G.W. 478 Hard and soft sandstone layers of the Dakota sandstone: Hog Ranch Canyon. Pueblo County, Colorado. 1912. Plate 7 in U.S. Geological Survey. Folio 186. 1912. #1:/Colorado-Folio 186/sgw00479 ID. Stose, G.W. 479 Looking toward mesa in the northwestern part of the (Apishapa) quadrangle, showing wooded mesa in the distance, capped by Timpas limestone, wooded medial bench capped by Greenstone limestone, and lowland underlain by Dakota sandstone. Pueblo County, Colorado. 1912. Plate 4 in U.S. Geological Survey. Folio 186. 1912. #1:/Colorado-Folio 186/sgw00482 ID. Stose, G.W. 482 Upper cross-bedded sandstone of the Dakota weathered into turreted forms, east of Reynolds ranch. Huerfano County, Colorado. 1912. Plate 10 in U.S. Geological Survey. Folio 186. 1912. #1:/Colorado-Folio 186/sgw00492 ID. Stose, G.W. 492 Old fire clay workings in dark shale at the top of the Purgatoire formation and overlying massive Dakota sandstone, 2 miles northeast of Thatcher. Las Animas County, Colorado. 1912. Plate 8 in U.S. Geological Survey. Folio 186. 1912. #1:/Colorado-Folio 186/sgw00494 ID. Stose, G.W. 494 Apishapa canyon: looking north toward mouth of Jones Lake Fork, showing massive Dakota sandstone cliffs at brink of canyon and light colored sandstone of Purgatoire formation on middle slopes. Las Animas County, Colorado. 1912. Plate 8 in U.S. Geological Survey. Folio 186. 1912. #1:/Colorado-Folio 186/sgw00495 ID. Stose, G.W. 495 Upper bed of Dakota sandstone weathered into dome like forms, north of Juan Baca Ranch. Las Animas County, Colorado. 1912. Plate 9 in U.S. Geological Survey. Folio 186. 1912. #1:/Maryland-Folio 179/sgw00622 ID. Stose, G.W. 622 High terrace at the gap of Fifteenmile Creek in Town Hill from the top of Keenan Ridge, level top of Keenan Ridge in the foreground and other level terraces and ridges in the middle ground are remnants of the Harrisburg peneplain; Sideling Hill in the distance. Allegany County, Maryland. 1911. Plate 9 in U.S. Geological Survey. Folio 179. 1912. #1:/Maryland-Folio 179/sgw00623 ID. Stose, G.W. 623 Details of structure of the Fluted Rocks, on Great Cacapon River as seen in late Fall unobscured by foliage. Morgan County, West Virginia. 1911. Plate 14 in U.S. Geological Survey. Folio 179. 1912. #1:/Colorado-Folio 186/sgw00673 ID. Stose, G.W. 673 Indian pictograph on Dakota sandstone cliff in Apishapa Canyon below mouth of south canyon, made by chipping the "desert varnish" from the weathered surface of the rock. Las Animas County, Colorado. 1912. Plate 2 in U.S. Geological Survey. Folio 186. 1912. #1:/New York-Folio 190/sgw00682 ID. Stose, G.W. 682 Panoramic Summer view of Niagara Falls from Canadian side of gorge, American Falls at left; Horseshoe Falls at right. Niagara County, New York. 1913. Plate 1 in U.S. Geological Survey. Folio 186. 1913. #1:/New York-Folio 190/sgw0682p ID. Stose, G.W. 682p Panoramic summer view of Niagara Falls: From Canadian side of gorge. American Falls at left; Horseshoe Falls at right. Niagara County, New York. 1913. Plate 1 in U.S. Geological Survey. Folio 190. 1913. #1:/New York-Folio 190/sgw00683 ID. Stose, G.W. 683 Panoramic winter view of Niagara Falls: from same point as Stose 682. Niagara County, New York. 1913. Plate 2 in U.S. Geological Survey. Folio 190. 1913. #1:/New York-Folio 190/sgw0683p ID. Stose, G.W. 683p Panoramic winter view of Niagara Falls: from same point as Stose 682. Niagara County, New York. 1913. Plate 2 in U.S. Geological Survey. Folio 190. 1913. #1:/New York-Folio 190/sgw00685 ID. Stose, G.W. 685 General view of the falls from cliff north of Prospect Point, American Falls in left foreground; Horseshoe Fall in distance. Note alignment of cliffs of Goat Island, American Falls and cliff of Prospect Point. The brink of the nearer part of the falls is a ledge that projects the general cliff line, and the water is deepest at this point. Niagara County, New York. 1913. Plate 3 in U.S. Geological Survey. Folio 190. 1913. #1:/New York-Folio 190/sgw00686 ID. Stose, G.W. 686 Horseshoe Falls from its east end, Goat Island shelf and Terrapin Rock in left foreground: deep water on crest beyond; High drift bluff of old channel of Niagara River in distance. Niagara County, New York. 1913. Plate 4 in U.S. Geological Survey. Folio 190. 1913. #1:/New York-Folio 190/sgw00687 ID. Stose, G.W. 687 American Falls from brink of gorge on Canadian side, talus of fallen blocks of Lockport dolomite along entire base; Luna Falls at right with "Rock of Ages" at its base: Sheet of water thin over entire crest. Niagara County, New York. 1913. Plate 5 in U.S. Geological Survey. Folio 190. 1913. #1:/California-Folio 193/sgw00760 ID. Stose, G.W. 760 Minutely folded thin-bedded radiolarian chert of San Francisco Group exposed in quarry in Golden Gate Park. San Francisco County, California. 1913. Plate 8 in U.S. Geological Survey. Folio 193. 1914. #1:/California-Folio 193/sgw00761 ID. Stose, G.W. 761 Steeply tilted rocks of San Pedro Point: San Mateo quadrangle, shales and sandstones of Martinez formation. San Mateo County, California. 1913. Plate 1 in U.S. Geological Survey. Folio 193. 1914. #1:/California-Folio 193/sgw00762 ID. Stose, G.W. 762 San Andrea rift valley, view southeastward toward Crystal Springs Lake, San Mateo quadrangle, the straight valley follows the zone of weakened rocks along the San Andreas fault. Crystal Springs Lake in the distance. San Mateo County, California. 1913. Plate 9 in U.S. Geological Survey. Folio 193. 1914. #1:/California-Folio 193/sgw00763 ID. Stose, G.W. 763 San Francisco Bay from the Berkeley Hills, Berkeley in the foreground. Mount Tamalpais at the right across the bay and the Golden Gate at left of center. Alameda California. 1913. Plate 4 in U.S. Geological Survey. Folio 193. 1914. #1:/California-Folio 193/sgw00764 ID. Stose, G.W. 764 Ellipsoidal basalt intrusive into thin-bedded radiolarian chert of San Francisco Group, Hunter Point, the layers of chert are much contorted by the intrusion. San Francisco County, California. 1913. Plate 6 in U.S. Geological Survey. Folio 193. 1914. #1:/California-Folio 193/sgw00765 ID. Stose, G.W. 765 Calera limestone member of Cahil sandstone, Franciscan Group, Calera Point, San Mateo quadrangle; the limestone contains layers of dark chert. San Mateo County, California. 1913. Plate 3 in U.S. Geological Survey. Folio 193. 1914. #1:/California-Folio 193/sgw00766 ID. Stose, G.W. 766 Western front of the Berkeley Hills, viewed from the north across Strawberry Creek, characteristic Coast Range topography. Alameda California. 1913. Plate 2 in U.S. Geological Survey. Folio 193. 1914. #1:/New York-Folio 190/tfb00001 ID. Taylor, F.B. 1 Lower end of upper great gorge in foreground and head of narrow Whirlpool Rapids gorge in middle distance, looking north under railroad bridges; note contrast in width of gorge and behavior of water in the two sections. Niagara County, New York. 1913. Plate 7 in U.S. Geological Survey. Folio 190. 1913. #1:/New York-Folio 190/tfb00002 ID. Taylor, F.B. 2 Upper great gorge of Niagara River: looking south from west end of cantilever railroad bridge, falls and International bridge in distance nearly 2 miles. Note quiet deep water of long pool and ripple around rock in foreground, which shows acceleration of current entering Whirlpool Rapids, Lockport dolomite cliff at top of bank at right. Niagara County, New York. 1913. Plate 6 in U.S. Geological Survey. Folio 190. 1913. #1:/New York-Folio 190/tfb00003 ID. Taylor, F.B. 3 Whirlpool Rapids gorge, looking north (downstream) from near east end of Grand Trunk Railway bridge. East side of Eddy Basin in distance, water in left foreground has not attained full velocity; greatest velocity just beyond the bend of gorge to the left; nearly vertical cliff above track in foreground to right of center. Niagara County, New York. 1913. Plate 8 in U.S. Geological Survey. Folio 190. 1913. #1:/New York-Folio 190/tfb00005 ID. Taylor, F.B. 5 Eddy Basin in foreground and lower end of Whirlpool Rapids gorge in center, looking southeast, upstream, swiftest water about center of view. Main current crosses east side of Eddy Basin, in left foreground: Lockport dolomite caps cliff; ledges of hard limestone of Clinton formation in middle of bluff. Niagara County, New York. 1913. Plate 9 in U.S. Geological Survey. Folio 190. 1913. #1:/New York-Folio 190/tfb00006 ID. Taylor, F.B. 6 Eddy Basin (in foreground) and the Whirlpool (beyond), looking north, sharp rapids over upper Whirlpool reef in center. Eddy Basin is part of deep portion of lower Great gorge. Niagara County, New York. 1913. Plate 10 in U.S. Geological Survey. Folio 190. 1913. #1:/New York-Folio 190/tfb00008 ID. Taylor, F.B. 8 The Whirlpool and deep pool section of lower Great gorge, looking northeast. Strong current crossing Whirlpool from right to left in foreground; rapids on lower Whirlpool reef in center, with deep pool of Lower Great gorge beyond. Foster Flats and head of Foster Rapids in distance. Niagara County, New York. 1913. Plate 11 in U.S. Geological Survey. Folio 190. 1913. #1:/New York-Folio 190/tfb00011 ID. Taylor, F.B. 11 Deep pool section of lower Great gorge, looking northeast, deep pool in foreground; Foster Flats and head of Foster Rapids to right of center. Niagara County, New York. 1913. Plate 12 in U.S. Geological Survey. Folio 190. 1913. #1:/New York-Folio 190/tfb00013 ID. Taylor, F.B. 13 Shallow section of lower Great gorge, looking southwest (upstream) from Niagara University. Foster Flats and lower part of Foster Rapids in distance. Niagara County, New York. 1913. Plate 13 in U.S. Geological Survey. Folio 190. 1913. #1:/New York-Folio 190/tfb00014 ID. Taylor, F.B. 14 Old Narrow gorge. Looking north from point near Niagara University. Lower end of lower Great gorge in left foreground, Old Narrow gorge begins where tracks in foreground near water bend to right. Lewiston and lower river in distance. Talus on west side for 20 to 25 feet above the water swept bare of trees by the jam of February 1909. Niagara County, New York. 1913. Plate 14 in U.S. Geological Survey. Folio 190. 1913. #1:/New York-Folio 190/tfb00015 ID. Taylor, F.B. 15 Old Narrow gorge and Lewiston branch gorge to the mouth of the gorge, looking north from point about 300 yards south of Smeaton Ravine. Lewiston and lower part of river in distance, the Rockport dolomite at the top of the cliff noticeably thins toward the mouth of the gorge. The limestone of the Clinton formation forms ledge in upper part of bluff and the Whirlpool sandstone member at base of the Albion makes ledge high up on slope beneath. Niagara County, New York. 1913. Plate 15 in U.S. Geological Survey. Folio 190. 1913. #1:/Canada-Folio 190/tfb00016 ID. Taylor, F.B. 16 Terrace capped by Whirlpool sandstone member of Albion sandstone, with Niagara escarpment at right; looking east from road above Queenston. Low till bluff of Cataract basin in distance over outer part of terrace. Ontario, Canada. 1913. Plate 17 in U.S. Geological Survey. Folio 190. 1913. #1:/Montana-Folio 196/cfc00079 ID. Calkins, F.C. 79 Contact of granite with dark schist of Prichard formation at head of Tenmile creek. Deer Lodge County, Montana. 1914. Plate 2 in U.S. Geological Survey. Folio 196. 1915. #1:/New Mexico-Folio 199/pai00956 ID. Paige, S. 956 Recent stream trenching in a tributary of Mangas valley, typical of Pleistocene gravel filled valleys of the region. Grant County, New Mexico. September 1914. Plate 13 in U.S. Geological Survey. Folio 199. 1916. #1:/New Mexico-Folio 199/pai00958 ID. Paige, S. 958 Open valley characteristic of lower part of valleys in Pleistocene gravel plains: view looking south toward Lone Mountain in distance. Grant County, New Mexico. September 1914. Plate 12 in U.S. Geological Survey. Folio 199. 1916. #1:/New Mexico-Folio 199/pai00968 ID. Paige, S. 968 Across the lowland east of Silver City toward the Pleistocene gravel mesas. The lowland was once covered to the level of the mesa by gravel and the mesas are the remnants. Grant County, New Mexico. September 1914. Plate 11 in U.S. Geological Survey. Folio 199. #1:/New Mexico-Folio 199/pai00974 ID. Paige, S. 974 Flow structure at edge of intrusive rhyolite porphyry stock west of Fort Bayard. Grant County, New Mexico. September 1914. Plate 2 in U.S. Geological Survey. Folio 199. 1916. #1:/New Mexico-Folio 199/pai00983 ID. Paige, S. 983 Precipitous scarp along front of range southeast of the Kneeling Nun formed by cap of flat lying rhyolite lava, view looking southeast; roughly columnar structure of the lava is shown in the near cliff. Grant County, New Mexico. September 1914. Plate 5 in U.S. Geological Survey. Folio 199. 1916. #1:/New Mexico-Folio 199/pai00986 ID. Paige, S. 986 Peculiar pinnacled weathering of a horizontal sheet of rhyolite south of Santa Rita; the pinnacles are about 20 feet high. Grant County, New Mexico. September 1914. Plate 6 in U.S. Geological Survey. Folio 199. 1916. #1:/New Mexico-Folio 199/pai00987 ID. Paige, S. 987 Pinnacle of rhyolite lava formed by weathering south of Santa Rita, near view of one of pinnacle shown in Paige 986. Grant County, New Mexico. September 1914. Plate 2 in U.S. Geological Survey. Folio 199. 1916. #1:/New Mexico-Folio 199/pai00988 ID. Paige, S. 988 Low mesa northeast of Lone Mountain formed by a capping of the andesite lava in Tertiary gravel and tuff; another intercalated lava head produces the bench on the slope of the mesa. Grant County, New Mexico. September 1914. Plate 7 in U.S. Geological Survey. Folio 199. 1916. #1:/New Mexico-Folio 199/pai01008 ID. Paige, S. 1008 Basalt dike that cuts Pleistocene gravel. The soft gravel has weathered away, leaving the hard dike standing like a wall. Grant County, New Mexico. September 1914. Plate 1 in U.S. Geological Survey. Folio 199. 1916. #1:/New Mexico-Folio 199/pai01012 ID. Paige, S. 1012 Tilted Pleistocene gravel forming cliffs at Hells Half Acre: view looking southeast. Grant County, New Mexico. September 1914. Plate 9 in U.S. Geological Survey. Folio 199. 1916. #1:/New Mexico-Folio 199/pai01021 ID. Paige, S. 1021 Basalt flow interbedded in Pleistocene gravel in valley of Bear Creek, the basalt flows form the upper rough cliffs, Pleistocene gravel the smooth lower cliff and the upper slope. Grant County, New Mexico. September 1914. Plate 8 in U.S. Geological Survey. Folio 199. 1916. #1:/New Mexico-Folio 199/pai01043 ID. Paige, S. 1043 Pleistocene gravel faulted down against rhyolite south of Wind canyon in Little Burro Mountain. Fault passes up ravine between white rhyolite cliff on left and gravel hill at right. Socorro County, New Mexico. September 1914. Plate 4 in U.S. Geological Survey. Folio 199. 1916. #1:/New Mexico-Folio 199/pai01090 ID. Paige, S. 1090 Light colored limestone altered to irregular dark mass of hedenbergite (pyroxene) by contact metamorphism near Hanover. Grant County, New Mexico. September 1914. Plate 10 in U.S. Geological Survey. Folio 199. 1916. #1:/Texas-Folio 194/rgb00007 ID. Richardson, G.B. 7 Southeast end of Sierra Diablo showing Hueco limestone overlying red sandstone of Millican formation, looking southwest at end of mesa. The cliff making rocks are in Hueco limestone; the slopes are softer red sandstone of the Millican formation. Culberson County, Texas. 1913. Plate 6 in U.S. Geological Survey. Folio 194. 1914. #1:/Texas-Folio 194/rgb00060 ID. Richardson, G.B. 60 Southeast end of Sierra Diablo showing Hueco limestone overlying red sandstone of Millican formation, looking southwest at end of mesa. The cliff making rocks are in Hueco limestone; the slopes are softer red sandstone of the Millican formation. Culberson County, Texas. 1913. Plate 6 in U.S. Geological Survey. Folio 194. 1914. #1:/Texas-Folio 194/rgb00210 ID. Richardson, G.B. 210 Fault northwest of Beach Mountain, looking northeast. Red sandstone of Millican formation in Morris Peak faulted up against Van Horn sandstone in foreground and El Paso limestone in background. Culberson County, Texas. 1913. Plate 3 in U.S. Geological Survey. Folio 194. 1914. #1:/Texas-Folio 194/rgb00215 ID. Richardson, G.B. 215 Escarpment of Sierra Diablo south of Victoria Peak, shows characteristic capping of mesa by Hueco limestone, trenched slopes on the softer Millican formation, and generally sparse vegetation. El Paso County, Texas. 1913. Plate 2 in U.S. Geological Survey. Folio 194. 1914. #1:/Texas-Folio 194/rgb00216 ID. Richardson, G.B. 216 Escarpment of Sierra Diablo south of Victoria Peak, shows characteristic capping of mesa by Hueco limestone, trenched slopes on the softer Millican formation, and generally sparse vegetation. El Paso County, Texas. 1913. Plate 2 in U.S. Geological Survey. Folio 194. 1914. #1:/Texas-Folio 194/rgb00217 ID. Richardson, G.B. 217 Escarpment of Sierra Diablo south of Victoria Peak, shows characteristic capping of mesa by Hueco limestone, trenched slopes on the softer Millican formation, and generally sparse vegetation. El Paso County, Texas. 1913. Plate 2 in U.S. Geological Survey. Folio 194. 1914. #1:/Texas-Folio 194/rgb00219 ID. Richardson, G.B. 219 Unconformity between Hueco limestone and Van Horn sandstone in butte 7 miles northwest of Van Horn, the almost horizontal Hueco limestone capping the butte overlies gently inclined Van Horn sandstone. Culberson County, Texas. 1913. Plate 1 in U.S. Geological Survey. Folio 194. 1914. #1:/Texas-Folio 194/rgb00220 ID. Richardson, G.B. 220 South end of salt flat, in vicinity of Van Horn, Wylie Mountain in the distance. Culberson County, Texas. 1913. Plate 5 in U.S. Geological Survey. Folio 194. 1914. #1:/Texas-Folio 194/rgb00221 ID. Richardson, G.B. 221 West face of Beach Mountain, showing El Paso limestone overlying Van Horn sandstone; Millican formation in Morris Peak at extreme left is faulted up against the Van Horn and El Paso formations. Beach's ranch house in valley in foreground. Culberson County, Texas. 1913. Plate 4 in U.S. Geological Survey. Folio 194. 1914. #1:/Texas-Folio 194/rgb00222 ID. Richardson, G.B. 222 West face of Beach Mountain, showing El Paso limestone overlying Van Horn sandstone; Millican formation in Morris Peak at extreme left is faulted up against the Van Horn and El Paso formations. Beach's ranch house in valley in foreground. Culberson County, Texas. 1913. Plate 4 in U.S. Geological Survey. Folio 194. 1914. #1:/Texas-Folio 194/rgb00223 ID. Richardson, G.B. 223 Threemile Mountain (on the left) showing Van Horn sandstone overlain by Hueco limestone, looking northeast, in the at the right Van Horn sandstone is overlain by El Paso limestone. Culberson County, Texas. 1913. Plate 8 in U.S. Geological Survey. Folio 194. 1914. #1:/Texas-Folio 194/rgb00224 ID. Richardson, G.B. 224 Small normal fault in southwest face of Beach Mountain 6 miles northwest of Van Horn. El Paso limestone and Van Horn sandstone offset by a fault in ravine in the middle of view. Culberson County, Texas. 1913. Plate 9 in U.S. Geological Survey. Folio 194. 1914. #1:/Colorado-Folio 198/rgb00265 ID. Richardson, G.B. 265 Unconformity at base of Castle Rock conglomerate at contact with Dawson arkose in cliffs of Castle Rock, shows uneven surface of contact and boulders of rhyolite in basal conglomerate. Douglas County, Colorado 1913. Plate 5 in U.S. Geological Survey. Folio 198. 1915. #1:/Colorado-Folio 198/rgb00267 ID. Richardson, G.B. 267 Castle Rock and mesa in distance, both capped by Castle Rock conglomerate, looking north. Douglas County, Colorado 1913. Plate 4 in U.S. Geological Survey. Folio 198. 1915. #1:/Colorado-Folio 198/rgb00268 ID. Richardson, G.B. 268 Closer view of hogback ridges of Perry Park, looking northwest across Bear Creek, dip of Dakota sandstone, which is nearly vertical on the high knob, becomes less steep toward the right. Sandstone of the Purgatoire, which forms a shoulder on the Dakota hogback, makes the white hill across the lake. Morrison and Lykins formations occupy depression between hogback ridges. Vertical Lyons sandstone makes an almost continuous wall on left. Douglas County, Colorado 1913. Plate 13 in U.S. Geological Survey. Folio 198. 1915. #1:/Colorado-Folio 198/rgb00270 ID. Richardson, G.B. 270 Gently dipping Paleozoic rocks resting on Pikes Peak granite west side of Bear Canyon, Perry Park. White Sawatch sandstone in lower part of cliff, thin-bedded Millsap limestone in upper part, and white sandstone of Fountain formation on top of hill. Douglas County, Colorado 1913. Plate 16 in U.S. Geological Survey. Folio 198. 1915. #1:/Colorado-Folio 198/rgb00273 ID. Richardson, G.B. 273 Hogback ridges of Perry Park, looking northwest across Bear Creek, curved double row of hogbacks of vertical Lyons sandstone on left and Dakota sandstone on right, separated by valley of softer rock. Sandstone of Purgatoire formation makes shoulder on left slope of Dakota hogback in distance. Gypsum of Lykins formation composes low white ridge in middle ground. Douglas County, Colorado 1913. Plate 12 in U.S. Geological Survey. Folio 198. 1915. #1:/Colorado-Folio 198/rgb00277 ID. Richardson, G.B. 277 Dakota hogback in Perry Park west of Gove Creek, looking northwest; Band of white gypsum of Lykins formation in middle ground. Lyons sandstone in foreground: Front Range in distance. Douglas County, Colorado 1913. Plate 14 in U.S. Geological Survey. Folio 198. 1915. #1:/Colorado-Folio 198/rgb00278 ID. Richardson, G.B. 278 Dakota hogback in Perry Park west of Gove Creek, looking northwest; Band of white gypsum of Lykins formation in middle ground. Lyons sandstone in foreground: Front Range in distance. Douglas County, Colorado 1913. Plate 14 in U.S. Geological Survey. Folio 198. 1915. #1:/Colorado-Folio 198/rgb00286 ID. Richardson, G.B. 286 "Monument" of Dawson arkose: 2 miles west of the town of Monument. El Paso County, Colorado 1913. Plate 8 in U.S. Geological Survey. Folio 198. 1915. #1:/Colorado-Folio 198/rgb00291 ID. Richardson, G.B. 291 Pikes Peak granite on top of Front Range southwest of Palmer Lake, showing jointing and rounded weathering of granite. El Paso County, Colorado 1913. Plate 18 in U.S. Geological Survey. Folio 198. 1915. #1:/Colorado-Folio 198/rgb00293 ID. Richardson, G.B. 293 Sloping terrace of Quaternary wash at base of Front Range, looking south across Beaver Creek. El Paso County, Colorado 1913. Plate 19 in U.S. Geological Survey. Folio 198. 1915. #1:/Colorado-Folio 198/rgb00295 ID. Richardson, G.B. 295 White Sawatch sandstone resting on Pikes Peak granite, offset apparently by a thrust fault, looking southeast across Gove Canyon: Sawatch sandstone cliff capped by thin- bedded Millsap limestone. Douglas County, Colorado 1913. Plate 17 in U.S. Geological Survey. Folio 198. 1915. #1:/Colorado-Folio 198/rgb00331 ID. Richardson, G.B. 331 Quaternary terraces in valley of East Plum Creek at Castle Rock, lower terrace in foreground and stream at right: higher terrace at left. Castle Rock in background. Douglas County, Colorado 1913. Plate 20 in U.S. Geological Survey. Folio 198. 1915. #1:/Colorado-Folio 198/rgb00332 ID. Richardson, G.B. 332 Peneplain on top of the Front Range at an elevation of about 9,000 feet, view northward along the range west of Mount Herman. Peneplain is cut on Pikes Peak granite. El Paso County, Colorado 1913. Plate 2 in U.S. Geological Survey. Folio 198. 1915. #1:/Colorado-Folio 198/rgb00335 ID. Richardson, G.B. 335 Castle like erosion remnant of Dawson arkose, just north of Deadmans Creek, looking northward along the Quaternary wash-covered slope at foot of Front Range. El Paso County, Colorado 1913. Plate 7 in U.S. Geological Survey. Folio 198. 1915. #1:/Colorado-Folio 198/rgb00340 ID. Richardson, G.B. 340 Castle Rock, a butte capped by Castle Rock conglomerate, look east. Douglas County, Colorado 1913. Plate 3 in U.S. Geological Survey. Folio 198. 1915. #1:/Colorado-Folio 198/rgb00341 ID. Richardson, G.B. 341 Grotesque erosion remnant of Dawson arkose called "Elephant's Head" east of Palmer Lake. El Paso County, Colorado 1913. Plate 9 in U.S. Geological Survey. Folio 198. 1915. #1:/Colorado-Folio 198/rgb00342 ID. Richardson, G.B. 342 Castlewood Reservoir and mesa to the east capped by Castle Rock conglomerate. Unconformable contact of Dawson arkose and overlying Castle Rock conglomerate occurs in cliffs at left. Douglas County, Colorado 1913. Plate 6 in U.S. Geological Survey. Folio 198. 1915. #1:/Iowa-Folio 200/sew00197 ID. Shaw, E.W. 197 Gravel covered terrace and slope to flood plain near mouth of Tete de Mort River on west border of Galena quadrangle, Jackson County, Iowa. August 17, 1910. Plate 7 in U.S. Geological Survey. Folio 200. 1916. #1:/Ilinois-Folio 200/sew00213 ID. Shaw, E.W. 213 Ridge just south of Elizabeth: showing typical form of hills capped by Niagara dolomite. Jo Daviess County, Illinois. October 16, 1910. Plate 5 in U.S. Geological Survey. Folio 200. 1916. #1:/Ilinois-Folio 200/sew01223 ID. Shaw, E.W. 1223 Lowermost thin-bedded part of Galena dolomite at bridge over Sinsinawa River, west of Galena. Jo Daviess County, Illinois. 1914. Plate 1in U.S. Geological Survey. Folio 200. 1916. #1:/Ilinois-Folio 200/sew01224 ID. Shaw, E.W. 1224 Typical exposure of Galena dolomite in bluff of Apple River near Millville, the lower Receptaculities zone occurs in the lower rocks exposed. Jo Daviess County, Illinois. 1914. Plate 3in U.S. Geological Survey. Folio 200. 1916. #1:/Ilinois-Folio 200/sew01225 ID. Shaw, E.W. 1225 Mound near Galena, capped by Niagara dolomite, shows disintegration of the dolomite outcrops and the concave slope developed in the underlying Maquoketa shale. Jo Daviess County, Illinois. 1914. Plate 3 in U.S. Geological Survey. Folio 200. 1916. #1:/Ilinois-Folio 200/sew01226 ID. Shaw, E.W. 1226 Typical exposure of thin-bedded cherty Niagara dolomite on crest of ridge just south of Elizabeth: near view of outcrop seen Shaw 213. Jo Daviess County, Illinois. October 1910. Plate 6 in U.S. Geological Survey. Folio 200. 1916. #1:/Ilinois-Folio 200/sew01227 ID. Shaw, E.W. 1227 Sand dune topography 1 mile north of Blanding, the sand dunes are old and covered with vegetation. Jo Daviess County, Illinois. October 1910. Plate 8 in U.S. Geological Survey. Folio 200. 1916. #1:/Ilinois-Folio 200/sew01228 ID. Shaw, E.W. 1228 Lake Peschang, an old oxbow lake in the Mississippi bottom 2 miles northwest of Blanding, precipitous Mississippi bluffs in distance composed of Galena dolomite. Jo Daviess County, Illinois. October 1910. Plate 9 in U.S. Geological Survey. Folio 200. 1916. #1:/Ilinois-Folio 200/sew01229 ID. Shaw, E.W. 1229 Terrace deposit near mouth of Sinsinawa River west of Galena, shows irregularity of bedding and character of material. Jo Daviess County, Illinois. October 1910. Plate 10 in U.S. Geological Survey. Folio 200. 1916. #1:/Ilinois-Folio 200/sew01230 ID. Shaw, E.W. 1230 Post glacial gorge of Apple River from a point near Millville, looking southwestward. Jo Daviess County, Illinois. 1914. Plate 11 in U.S. Geological Survey. Folio 200. 1916. #1:/Ohio-Folio 197/sgw00868 ID. Stose, G.W. 868 Kames of Spangler Hill, 5 miles south of Columbus, irregular hills of drift. Franklin County, Ohio. 1914. Plate 1 in U.S. Geological Survey. Folio 197. 1915. #1:/Ohio-Folio 197/sgw00869 ID. Stose, G.W. 869 Quarry face of Columbus limestone, near Marble Cliff, showing thicker-bedded quarry rock at the base. Franklin County, Ohio. 1914. Plate 4 in U.S. Geological Survey. Folio 197. 1915. #1:/Ohio-Folio 197/sgw00870 ID. Stose, G.W. 870 Berea sandstone resting unconformably on Bedford shale, near Lithopolis, the hard ledge above the man's head shows the full thickness of Berea sandstone present at this place. The nature of the unconformity and the variable thickness of the sandstone are clearly shown. Photo by H.A. Gleason. Fairfield County, Ohio. 1914. Plate 5 in U.S. Geological Survey. Folio 197. 1915. #1:/Ohio-Folio 197/sgw00871 ID. Stose, G.W. 871 Large spheroidal "ironstone" concretions, characteristic of the lower part of the Ohio shale: at "the narrows," north of Worthington. Franklin County, Ohio. 1914. Plate 6 in U.S. Geological Survey. Folio 197. 1915. #1:/Ohio-Folio 197/sgw00872 ID. Stose, G.W. 872 Quarry face of lower part of Cuyahoga formation at Lithopolis, showing thick beds of homogeneous fine-grained sandstone suitable for building. Fairfield County, Ohio. 1914. Plate 7 in U.S. Geological Survey. Folio 197. 1915. #1:/Maryland-Folio 204/dnh00206 ID. Darton, N.H. 206 Vertically jointed clay of Raritan formation in wave-cut cliff, Worton Point, Kent County, Maryland. 1912. Plate 1 in U.S. Geological Survey. Folio 204. 1916. #1:/Maryland-Folio 204/dnh00215 ID. Darton, N.H. 215 Matawan formation containing large seal-shaped concretions on south shore of Gibbon Island, concretions derived from the rock in the bluff by weathering lie along the beach. There is a specimen of Exogyra costata just below the concretion in the bluff. George O. Smith at right. Ann Arundel County, Maryland. 1912. Plate 5 in U.S. Geological Survey. Folio 204. 1916. #1:/Maryland-Folio 204/dnh00219 ID. Darton, N.H. 219 Bluff of clay marl of Matawa formation underlain by Magothy formation near Grove Point, the ledge is undercut by the removal of loose laminated sand of the Magothy formation by marine erosion. Cecil County, Maryland. 1912. Plate 4 in U.S. Geological Survey. Folio 204. 1916. #1:/Colorado-Folio 203/dnh00427 ID. Darton, N.H. 427 Rock pinnacles formed by erosion in Garden of the Gods, view looking east: pinnacles of vertical thin-bedded red sandstone of Fountain formation; more massive forms of thicker sandstone of Lyons formation on left. El Paso County, Colorado. 1914. Plate 8 in U.S. Geological Survey. Folio 203. 1916. #1:/Colorado-Folio 203/dnh00434 ID. Darton, N.H. 434 "Hoodoos" in southern part of Garden of the Gods view looking west, these curious shaped masses are formed by erosion of red conglomeratic sandstone of Fountain formation. El Paso County, Colorado. 1914. Plate 10 in U.S. Geological Survey. Folio 203. 1916. #1:/Colorado-Folio 203/dnh01055 ID. Darton, N.H. 1055 Natural monuments formed by erosion in Monument Park. The monuments are formed of Dawson arkose, layers of which have been hardened by a cement of iron oxides and have resisted weathering, thus forming a cap that has protected the softer rocks beneath. Two of these hard layers are shown in monument at left. El Paso County, Colorado. 1914. Plate 12 in U.S. Geological Survey. Folio 203. 1916. #1:/Colorado-Folio 203/dnh01056 ID. Darton, N.H. 1056 Natural monuments formed by erosion of Dawson arkose in Monument Park, shows wide extent of capping of hard layer of brown sandstone. El Paso County, Colorado. 1914. Plate 14 in U.S. Geological Survey. Folio 203. 1916 #1:/Colorado-Folio 203/dnh01062 ID. Darton, N.H. 1062 Hogback ridge of Dakota sandstone in Glen Eyrie, view looking northwest, Dakota sandstone in foreground dips steeply to the east. High ledge of vertical red and white sandstones of Lyons formation in middle distance; Manitou limestone on lower slopes of Front Range in left distance. El Paso County, Colorado. 1914. Plate 3 in U.S. Geological Survey. Folio 203. 1916. #1:/Colorado-Folio 203/dnh01078 ID. Darton, N.H. 1078 Gateway of Garden of the Gods, view looking west to Pikes Peak in the distance, the gateway is formed by vertical beds of sandstone of Lyons formation. High white ledge in front of the red sandstone is the top sandstone of the Lyons and lower white ledge in the foreground is gypsum at top of Lykins formation. El Paso County, Colorado. 1914. Plate 7 in U.S. Geological Survey. Folio 203. 1916. #1:/Colorado-Folio 203/dnh01506 ID. Darton, N.H. 1506 Manitou limestone and Sawatch sandstone in Williams Canyon near The Narrows, Manitou; Manitou limestone forms upper white cliffs on left, lower cliffs are composed of Sawatch sandstone. Photo by G.I Finlay. El Paso County, Colorado. 1914. Plate 5 in U.S. Geological Survey. Folio 203. 1916. #1:/Colorado-Folio 203/dnh01508 ID. Darton, N.H. 1508 Sawatch sandstone resting on even surface of Pikes Peak granite: Ute Pass, near Manitou. El Paso County, Colorado. 1914. Plate 6 in U.S. Geological Survey. Folio 203. 1916 #1:/Kansas-Folio 206/hinds092 ID. Hinds, H. 92 Basal sandstone of Lawrence shale member, which here rests unconformably on Weston shale member of Douglas formation: pit of Leavenworth Vitrified Brick Co., Leavenworth. Leavenworth County, Kansas. 1915. Plate 5 in U.S. Geological Survey. Folio 206. 1917. #1:/Kansas-Folio 206/hinds097 ID. Hinds, H. 97 Lower part of Dread limestone member of Douglas formation, in road cut on Government Hill, northwest of Leavenworth. Leavenworth County, Kansas. 1915. Plate 6 in U.S. Geological Survey. Folio 206. 1917. #1:/Missouri-Folio 206/hinds105 ID. Hinds, H. 105 Interglacial boulder bed of probable Aftonian stage, near Weston. Platte County, Missouri. 1915. Plate 7 in U.S. Geological Survey. Folio 206. 1917. #1:/Kansas-Folio 206/hinds108 ID. Hinds, H. 108 Lansing formation, including Plattsburg limestone member, which appears in two ledges in middle of cliff, near mouth of Ninemile Creek, Lansing, Leavenworth County, Kansas. 1915. Plate 1 in U.S. Geological Survey. Folio 206. 1917 #1:/Minnesota-Folio 201/sfw00001 ID. Sardeson, F.W. 1 Mississippi River and gorge at Minnehaha, view looking upstream from mouth of Minnehaha Creek; St. Peter sandstone capped by Platteville limestone in bluff at left. Hennepin County, Minnesota. 1914. Plate 1 in U.S. Geological Survey. Folio 201. 1916. #1:/Minnesota-Folio 201/sfw00002 ID. Sardeson, F.W. 2 Mississippi River and gorge at Minneapolis, viewed from campus of the State University looking upstream toward St. Anthony Falls, concealed by the bridges. The lower dam and powerhouse are seen under the bridges. The river above the falls is seen over the powerhouse. Ramsey County, Minnesota. 1914. Plate 2 in U.S. Geological Survey. Folio 201. 1916. #1:/Minnesota-Folio 201/sfw00003 ID. Sardeson, F.W. 3 Mississippi River looking northwest from R.I. Ry Bridge near Newport. Minneapolis-St. Paul quadrangles. Dakota County, Minnesota. 1914. Folio 201. 1916. #1:/Minnesota-Folio 201/sfw00004 ID. Sardeson, F.W. 4 East wall of the Mississippi gorge above Washington Avenue bridge; East Minneapolis, St. Peter sandstone overlain by Platteville limestone, which is capped by glacial drift. Hennepin County, Minnesota. 1914. Plate 3 in U.S. Geological Survey. Folio 201. 1916. #1:/Minnesota-Folio 201/sfw00005 ID. Sardeson, F.W. 5 East wall of the Mississippi gorge below Washington Avenue bridge, East Minneapolis; St. Peter sandstone overlain by Platteville limestone which is capped by glacial drift. The escarpment and bench at the right are remnants of an old scarp of St. Anthony Falls. Hennepin County, Minnesota. 1914. Plate 4 in U.S. Geological Survey. Folio 201. 1916. #1:/Minnesota-Folio 201/sfw00006 ID. Sardeson, F.W. 6 St. Peter sandstone cliff opposite Minnehaha Falls. General view. Minneapolis-St. Paul quadrangles. Ramsey County, Minnesota. 1914. Folio 201. 1916. #1:/Minnesota-Folio 201/sfw00007 ID. Sardeson, F.W. 7 St. Peter sandstone in cliff opposite Minnehaha, the friability of the sandstone is shown by the loose sand at base of the cliff and its purity by its whiteness. Hennepin County, Minnesota. 1914. Plate 5 in U.S. Geological Survey. Folio 201. 1916. #1:/Minnesota-Folio 201/sfw00008 ID. Sardeson, F.W. 8 St. Peter sandstone cliff opposite Minnehaha Falls. Near view. Minneapolis-St. Paul quadrangles. Ramsey County, Minnesota. 1914. Folio 201. 1916. #1:/Minnesota-Folio 201/sfw00009 ID. Sardeson, F.W. 9 Shakopee dolomite in cliff on east side of Mississippi River below Newport, shows the irregular bedding and cavernous weathered outcrop of the formation. Washington County, Minnesota. 1914. Plate 6 in U.S. Geological Survey. Folio 201. 1916. #1:/Minnesota-Folio 201/sfw00010 ID. Sardeson, F.W. 10 Shakopee dolomite cliff on east side of Mississippi River, 1 mile south of Newport. Minneapolis-St. Paul quadrangles. Washington County, Minnesota. 1914. Folio 201. 1916. #1:/Minnesota-Folio 201/sfw00011 ID. Sardeson, F.W. 11 Shakopee dolomite cliff on east side of Mississippi River, 1 mile south of Newport. Minneapolis-St. Paul quadrangles. Washington County, Minnesota. cc 1910. Folio 201. 1916. #1:/Minnesota-Folio 201/sfw00012 ID. Sardeson, F.W. 12 Cryptozoon Minnesotense a calcareous mass secreted by algae in Shakopee dolomite, south of Inver Grove; diameter of mass about 6 feet. Dakota County, Minnesota. 1914. Plate 7 in U.S. Geological Survey. Folio 201. 1916. #1:/Minnesota-Folio 201/sfw00014 ID. Sardeson, F.W. 14 Minnehaha Falls, the stream falls 63 feet over Platteville limestone capping St. Peter sandstone Hennepin County, Minnesota. 1914. Plate 8 in U.S. Geological Survey. Folio 201. 1916. #1:/Minnesota-Folio 201/sfw00015 ID. Sardeson, F.W. 15 Platteville limestone overlying St. Peter sandstone, in cliff of Mississippi gorge at the State University; the character of the lower limestones of the Platteville and shale bands at the contact with the St. Peter sandstone are well shown. Ramsey County, Minnesota. 1914. Plate 9 in U.S. Geological Survey. Folio 201. 1916. #1:/Minnesota-Folio 201/sfw00016 ID. Sardeson, F.W. 16 Upper part of St. Peter sandstone and basal beds of Platteville limestone in railroad cut in Anoka County, near Northtown, northeast Minneapolis; the dark shale makes the contact very sharp. Minnesota. 1914. Plate 10 in U.S. Geological Survey. Folio 201. 1916. #1:/Minnesota-Folio 201/sfw00017 ID. Sardeson, F.W. 17 Platteville limestone and St. Peter sandstone contact near Northtown. Anoka quadrangle. Anoka County, Minnesota. cc 1910. Folio 201. 1916. #1:/Minnesota-Folio 201/sfw00018 ID. Sardeson, F.W. 18 Decorah shale and overlying shaly limestone of the Galena in quarry of the Twin City Brick Co., near Pickerel Lake, St. Paul. The shaly Galena limestone in the upper part of the cliff is overlain by Kansan drift. Ramsey County, Minnesota. 1914. Plate 11 in U.S. Geological Survey. Folio 201. 1916. #1:/Minnesota-Folio 201/sfw00019 ID. Sardeson, F.W. 19 Decorah shale and shaly Galena limestone in quarry of Twin City Brick Co. near Pickerel lake, St. Paul. St. Paul quadrangle. Dakota County, Minnesota. 1914. Folio 201. 1916. #1:/Minnesota-Folio 201/sfw00020 ID. Sardeson, F.W. 20 Fucoid beds near top of Decorah shale, characteristic of the formation in the area, the fucoid stems are weathered in relief on the bedding surface. Hennepin County, Minnesota. 1914. Plate 12 in U.S. Geological Survey. Folio 201. 1916. #1:/Minnesota-Folio 201/sfw00021 ID. Sardeson, F.W. 21 Beds of Decorah shale dislocated by the advance of the ice sheet from the left, in cut on boulevard at foot of State St., Minneapolis. Layers of Decorah shale have been dislocated so that at the left they are rest on undisturbed Platteville limestone, but at the right, they lie on undisturbed Decorah shale. They are overlain by glacial till. Hennepin County, Minnesota. 1914. Plate 13 in U.S. Geological Survey. Folio 201. 1916. #1:/Minnesota-Folio 201/sfw00022 ID. Sardeson, F.W. 22 Surface of Platteville limestone smoothed and grooved by the Kansan ice sheet. Quarry south of the State University, Minneapolis, The limestone is overlain by hard Kansan till. Hennepin County, Minnesota. 1914. Plate 14 in U.S. Geological Survey. Folio 201. 1916. #1:/Minnesota-Folio 201/sfw00023 ID. Sardeson, F.W. 23 Red outwash sand and gravel overlain by Wisconsin gray till, State University campus, Minneapolis. Hennepin County, Minnesota. 1914. Plate 15 in U.S. Geological Survey. Folio 201. 1916. #1:/Minnesota-Folio 201/sfw00024 ID. Sardeson, F.W. 24 Near view showing details of red outwash sand and gravel shown in Sardeson 23, Hennepin County, Minnesota. 1914. Plate 16 in U.S. Geological Survey. Folio 201. 1916. #1:/Minnesota-Folio 201/sfw00025 ID. Sardeson, F.W. 25 Laminated glacial clay, clay pit at Northtown. Anoka quadrangle. Hennepin County, Minnesota. 1914. #1:/Minnesota-Folio 201/sfw00026 ID. Sardeson, F.W. 26 Interglacial laminated clay tilted by the thrust pf the advancing Wisconsin ice sheet. Overlain by river gravel, clay pit at Northtown, Hennepin County, Minnesota. 1914. Plate 17 in U.S. Geological Survey. Folio 201. 1916. #1:/Minnesota-Folio 201/sfw00027 ID. Sardeson, F.W. 27 Thin sheet of Wisconsin gray till overlying a thin sheet of Wisconsin red till which rests on red glacial sand in sand pit on Snelling Avenue, southwest of St. Paul, in the gray till there are white limestone pebbles and below it lies the red till, which is free from limestone pebbles and is streaked with lime leached from the gray till above. Ramsey County, Minnesota. 1914. Plate 18 in U.S. Geological Survey. Folio 201. 1916. #1:/Minnesota-Folio 201/sfw00028 ID. Sardeson, F.W. 28 Soil bands in Pleistocene dune sands on Ste. Mary's Avenue, Prospect Park, Minneapolis, Hennepin County, Minnesota. 1914. Plate 19 in U.S. Geological Survey. Folio 201. 1916. #1:/Minnesota-Folio 201/sfw00029 ID. Sardeson, F.W. 29 Blocks of Platteville limestone on eroded surface of St. Peter sandstone left in this position at foot of receding falls of river Warren. Exposed in railroad cut west of High Bridge, St. Paul. Ramsey County, Minnesota. 1914. Plate 20 in U.S. Geological Survey. Folio 201. 1916 #1:/Minnesota/sfw00030 ID. Sardeson, F.W. 30 Gray loam on red till. Snelling Ave. sand pit, St. Paul. St. Paul quadrangle. Ramsey County, Minnesota. 1914. #1:/Minnesota/sfw00031 ID. Sardeson, F.W. 31 Red till showing grained false stratification from drag of gray drift-ice sheet. Snelling Ave. sand pit, St. Paul. St. Paul quadrangle. Ramsey County, Minnesota. 1914. #1:/Minnesota/sfw00032 ID. Sardeson, F.W. 32 Outwash of red Wisconsin drift in gravel pit in South St. Paul. St. Paul quadrangle. Dakota County, Minnesota. 1914. #1:/Minnesota/sfw00033 ID. Sardeson, F.W. 33 Mississippi River at the clay pit at Northtown. Anoka quadrangle. Hennepin County, Minnesota. cc 1910. #1:/Minnesota-Folio 201/sfw00034 ID. Sardeson, F.W. 34 St. Anthony Falls in 1857, from the west bank. Minneapolis quadrangle. Photo by Richardt. Copied from Geololgy and Natural History Survey of Minnesota, Vol. 2, 1888. Hennepin County, Minnesota. 1851. Folio 201. 1916. #1:/Minnesota-Folio 201/sfw00035 ID. Sardeson, F.W. 35 St. Anthony Falls in 1851, from Hennepin Island. Minnespolis quadrangle. Photo by Alex Hesler. Copied from Geology and Natural History Survey of Minnesota, Vol 2, 1888. Hennepin County, Minnesota. 1851. Folio 201. 1916. #1:/Colorado- Folio 203/sgw00876 ID. Stose, G.W. 876 Front Range from the plains east of Colorado Springs, highest peak near center of mountain group is Pikes Peak; small round knob to left is Cameron Cone; large mass to left is Mount Garfield; sharp peak at extreme left is Mount Rosa. Mountain tops at right of Ute Pass and valley of Fountain Creek are part of a high plateau. Back of Colorado Spring is a gravel-capped terrace, which merges in The Mesa at right. Beyond The Mesa are the sedimentary rock ridges of the Garden of the Gods. The Ute Pass fault, which comes out of mountains along Fountain Creek, follows foot of range to left. El Paso County, Colorado. 1914. Plate 1 in U.S. Geological Survey. Folio 203. 1916. #1:/Colorado- Folio 203/sgw0876a ID. Stose, G.W. 876a Front Range from the plains east of Colorado Springs, highest peak near center of mountain group is Pikes Peak; small round knob to left is Cameron Cone; large mass to left is Mount Garfield; sharp peak at extreme left is Mount Rosa. Mountain tops at right of Ute Pass and valley of Fountain Creek are part of a high plateau. Back of Colorado Spring is a gravel-capped terrace, which merges in The Mesa at right. Beyond The Mesa are the sedimentary rock ridges of the Garden of the Gods. The Ute Pass fault, which comes out of mountains along Fountain Creek, follows foot of range to left. El Paso County, Colorado. 1914. Plate 1 in U.S. Geological Survey. Folio 203. 1916. #1:/Colorado- Folio 203/sgw00877 ID. Stose, G.W. 877 Pikes Peak summit from the northeast spur; large granite masses like those shown in foreground cover much of the top of the mountain; mountain tops at left part of elevated plateau, sharp peak at extreme left is Mount Rosa. El Paso County, Colorado. 1914. Plate 2in U.S. Geological Survey. Folio 203. 1916. #1:/Colorado- Folio 203/sgw0877a ID. Stose, G.W. 877a Pikes Peak summit from the northeast spur; large granite masses like those shown in foreground cover much of the top of the mountain; mountain tops at left part of elevated plateau, sharp peak at extreme left is Mount Rosa. El Paso County, Colorado. 1914. Plate 2 in U.S. Geological Survey. Folio 203. 1916. #1:/Maryland-Folio 204/sgw00949 ID. Stose, G.W. 949 Irregularity in bedding of mottled clay and gravelly sand of Patuxent formation in cut on Baltimore & Ohio railroad near Joppa, Harford County, Maryland. 1912. Plate 1 in U.S. Geological Survey. Folio 204. 1916. #1:/Maryland-Folio 204/sgw00950 ID. Stose, G.W. 950 Erosion remnants of white quartzose sandstone of Raritan formation in Patapsco River off Rock Point, known as White Rocks, Anne Arundel County, Maryland. 1912. Plate 3 in U.S. Geological Survey. Folio 204. 1916. #1:/Maryland-Folio 204/sgw00951 ID. Stose, G.W. 951 Indurated fossiliferous Aquia formation on Chester River 2.5 miles below Chestertown contains casts of large mollusks of Eocene age. Kent County, Maryland. 1912. Plate 6 in U.S. Geological Survey. Folio 204. 1916. #1:/Maryland-Folio 204/sgw00952 ID. Stose, G.W. 952 Conglomerate in Wicomico formation, near Betterton, the Wicomico formation extends below sea level at this point. Kent County, Maryland. 1912. Plate 7 in U.S. Geological Survey. Folio 204. 1916. #1:/Maryland-Folio 204/sgw00953 ID. Stose, G.W. 953 Recent minor fault of interbedded clay and sand of Talbot formation: on Morgan Creek, Kent County, Maryland. 1912. Plate 8 in U.S. Geological Survey. Folio 204. 1916. #1:/Maryland-Folio 204/sgw00954 ID. Stose, G.W. 954 Buried forest in Talbot formation represented by stumps of trees which are exposed by recent erosion on shore south of Bodkin Point, large cypress stumps standing upright on the beach were embedded in peat of Talbot formation. The 20-foot cliff has been cut back and stumps uncovered during the last 30 years by marine erosion. Anne Arundel County, Maryland. 1912. Plate 9 in U.S. Geological Survey. Folio 204. 1916. #1:/Maryland-Folio 204/sgw00955 ID. Stose, G.W. 955 Sand spit that forms bar across mouth of Lloyd creek, view looking west from top of cliff opposite mouth of creek. Kent County, Maryland. 1912. Plate 10 in U.S. Geological Survey. Folio 204. 1916. #1:/Michigan-Folio 205/sgw00956 ID. Stose, G.W. 956 Detroit River dolomite temporarily exposed in bed of Detroit River near Stony Island, during excavation of Livingstone channel, the rock layers are nearly horizontal and their surfaces have been pitted and roughened by solution in the river water. River bed here is free from boulders. Wayne County, Michigan. 1916. Plate 1 in U.S. Geological Survey. Folio 205. 1917. #1:/Michigan-Folio 205/sgw00957 ID. Stose, G.W. 957 Dundee limestone at Sibley quarry, stripped of its covering of drift. The rock surface is smoothed, grooved and striated by an ice sheet, probably Illinoian. The grooves and furrows, in which the boy sits, strike southward. The striae in the foreground strike northwestward; view northwestward. Wayne County, Michigan. 1916. Plate 2 in U.S. Geological Survey. Folio 205. 1917. #1:/Michigan-Folio 205/sgw00958 ID. Stose, G.W. 958 Detroit River dolomite temporarily exposed in bed of Detroit River near Stony Island during excavation of Livingstone Channel, show rock surface smoothed and grooved by the Illinoian ice sheet. Grooves in the rock surface are shown by dark streaks of soil and gravel in the foreground. Illinoian till covers rock surface in the cut, beneath the dump. Wayne County, Michigan. 1916. Plate 3 in U.S. Geological Survey. Folio 205. 1917. #1:/Michigan-Folio 205/sgw00959 ID. Stose, G.W. 959 Valley of glacial stream between outer and inner ridges of Defiance moraine, view eastward from crest of outer ridge toward inner ridge in distance. Iron County, Michigan. 1916. Plate 4 in U.S. Geological Survey. Folio 205. 1917. #1:/Michigan-Folio 205/sgw00960 ID. Stose, G.W. 960 Section of Illinoian till temporarily exposed in bed of Detroit River near Stony Island during excavation of Livingstone Channel, this till is very stony compared with the Wisconsin till shown in Stose 961, Wayne County, Michigan. 1916. Plate 5 in U.S. Geological Survey. Folio 205. 1917. #1:/Michigan-Folio 205/sgw00961 ID. Stose, G.W. 961 Wisconsin till, horizontally laminated and nearly free from pebbles exposed in a stripping at Sibley quarry. Wayne County, Michigan. 1916. Plate 6 in U.S. Geological Survey. Folio 205. 1917. #1:/Michigan-Folio 205/sgw00962 ID. Stose, G.W. 962 Milk River, Lake St. Clair formed by boulders, which have protected it from erosion. Boulders along the shore have been washed out of the Emmet Moraine. Macomb County, Michigan. 1916. Plate 7 in U.S. Geological Survey. Folio 205. 1917. #1:/Michigan-Folio 205/sgw00963 ID. Stose, G.W. 963 Boulders of Grosse Isle moraine covering bed of Detroit River near Stony Island, temporarily bared during excavation of Livingstone Channel. Wayne County, Michigan. 1916. Plate 8 in U.S. Geological Survey. Folio 205. 1917. #1:/Michigan-Folio 205/sgw00964 ID. Stose, G.W. 964 Kame gravel covered by later till deposited during re-advance of the ice 1 mile northwest of Farmington. The till is the harder material at the top, overlying the kame gravel in the pit. Oakland County, Michigan. 1916. Plate 9 in U.S. Geological Survey. Folio 205. 1917. #1:/Michigan-Folio 205/sgw00965 ID. Stose, G.W. 965 Section of kame deposit just east of Northville, gravel from the kame is used as road material. Rejected cobble and larger boulders from the gravel are piled at base of cut. Wayne County, Michigan. 1916. Plate 10 in U.S. Geological Survey. Folio 205. 1917. #1:/Michigan-Folio 205/sgw00966 ID. Stose, G.W. 966 The Thoroughfare, on Grosse Isle: A distributary channel of glacial Detroit River between ridges of the Grosse Isle moraine. Wayne County, Michigan. 1916. Plate 11 in U.S. Geological Survey. Folio 205. 1917. #1:/Michigan-Folio 205/sgw00967 ID. Stose, G.W. 967 Section of the beach deposit of glacial lake Whittlesey 1 mile northeast of Plymouth, shows strongly marked cross bedding in the sand and gravel of the deposit. Wayne County, Michigan. 1916. Plate 12 in U.S. Geological Survey. Folio 205. 1917. #1:/New Mexico-Folio 207/bef00743 ID. Burchard, E.F. 743 Contact of the granite porphyry and conglomerate of Lobo formation on south slope of Fluorite ridge l mile west of Fluor camp, view looking north. The conglomerate lies on an irregular surface of the porphyry. The contact is indicated by the hammer head. Luna County, New Mexico. 1914. Plate 8 in U.S. Geological Survey. Folio 207. 1917. #1:/New Mexico-Folio 207/dnh01271 ID. Darton, N.H. 1271 Capital Dome at northwest end of Florida Mountains, view looking northeast. The dome and the crest of the ridge in the background are capped by Tertiary agglomerate with Lobo formation just beneath. The low knob at the left is composed of Pre-Cambrian granite, which is overlain by Bliss sandstone, El Paso limestone and Montoya limestone. To the right of the small valley in the center of the view the rock is granite. Luna County, New Mexico. 1914. Plate 3 in U.S. Geological Survey. Folio 207. 1917. #1:/New Mexico-Folio 207/dnh01277 ID. Darton, N.H. 1277 Spring at Fort Cummings, view looking northeast. The water is flowing through the bolson deposits is brought to the surface here by the rhyolite ledge in the foreground, which crosses the valley. Near the ranch houses in the distance at the right are the remains of the old fort. The hills beyond consist of basalt. Luna County, New Mexico. 1914. Plate 5 in U.S. Geological Survey. Folio 207. 1917. #1:/New Mexico-Folio 207/dnh01278 ID. Darton, N.H. 1278 Dry bed of Mimbres River east of Spalding, view looking northeast. The shallow depression in the bolson surface in the foreground is the river bed. Cooks Range in the distance; Cook Peak at the right. Luna County, New Mexico. 1914. Plate 6 in U.S. Geological Survey. Folio 207. 1917. #1:/New Mexico-Folio 207/dnh01280 ID. Darton, N.H. 1280 Black Mountain, view looking northwest. Top of mountain is formed by basalt flow, which overlies volcanic ash and tuff on slope. A small mass of rhyolite, felsite, and obsidian is exposed in the knoll at the left, at the base of the mountain. Luna County, New Mexico. 1914. Plate 9 in U.S. Geological Survey. Folio 207. 1917. #1:/New Mexico-Folio 207/dnh01282 ID. Darton, N.H. 1282 Massacre Peak on Cooks range, view looking southwest. The is capped with andesite The Butterfield trail crosses the mountain through the pass in the background, which is composed of agglomerate. Luna County, New Mexico. 1914. Plate 8 in U.S. Geological Survey. Folio 207. 1917. #1:/New Mexico-Folio 207/dnh01283 ID. Darton, N.H. 1283 West side of central part of Florida Mountains, view looking from a point near the grade road. The south part of the mountains is composed chiefly of Pre-Cambrian granite, the north part of Tertiary agglomerate. The peak at the left of the middle is Arco del Diablo. Luna County, New Mexico. 1914. Plate 2 in U.S. Geological Survey. Folio 207. 1917. #1:/New Mexico-Folio 207/dnh01287 ID. Darton, N.H. 1287 South end of Florida Mountains, showing their abrupt rise out of the wide, flat bolson. High point in the center of the view is South Peak. All the visible part of the mountains is composed of Pre-Cambrian granite. The small dark ridge at the foot of the mountains at the right consists of basalt. The bolson deposits in the foreground contain water at moderate depth, the water rising in most wells to the surface. Luna County, New Mexico. 1914. Plate 1 in U.S. Geological Survey. Folio 207. 1917. #1:/South Dakota-Folio 209/dnh01291 ID. Darton, N.H. 1291 Deer Ears, a high butte of the Lance formation capped by sandstone and conglomerate of the Chadron formation, at the north edge of the Newell quadrangle, view from the south. Butte County, South Dakota. 1912. Plate 3 in U.S. Geological Survey. Folio 209. 1919. #1:/South Dakota-Folio 209/dnh01292 ID. Darton, N.H. 1292 Mass of limestone at the "tepee butte" horizon of the Pierre shale exposed on a hilltop by weathering, east of Willow Creek, southeast of Newell. Butte County, South Dakota. 1912. Plate 6 in U.S. Geological Survey. Folio 209. 1919. #1:/New Mexico-Folio 207/dnh01341 ID. Darton, N.H. 1341 Tertiary agglomerate on outlying knob at north end of Florida Mountains, view looking northwest. The stratification of the agglomerate is nearly horizontal. Luna County, New Mexico. 1914. Plate 4 in U.S. Geological Survey. Folio 207. 1917. #1:/Illinois-Folio 208/hinds110 ID. Hinds, H. 110 Murphysboro (Colchester or No. 2) coal and underlying beds in pit of Colchester Brick & Tile Co.: Colchester. McDonough County, Illinois. 1915. Figure 12 in U.S. Geological Survey. Folio 208. 1919. #1:/Illinois-Folio 208/hinds112 ID. Hinds, H. 112 Exposure of Yarmouth (?) orange colored sands (in slope) separated from Illinoian till (at top) by a thin soil zone in road cut near Spring Creek. Emmet County, Illinois. 1915. Figure 9 in U.S. Geological Survey. Folio 208. 1919. #1:/Illinois-Folio 208/hinds115 ID. Hinds, H. 115 Cross bedding or false bedding of limestone in the Spergen and Warsaw formations exposed on Flour creek, 1 mile south Plymouth. Hancock County, Illinois. 1915. Figure 6 in U.S. Geological Survey. Folio 208. 1919. #1:/Illinois-Folio 208/hinds117 ID. Hinds, H. 117 Keokuk limestone in small quarry: 2 miles northwest of Plymouth. Hancock County, Illinois. 1915. Figure 5 in U.S. Geological Survey. Folio 208. 1919. #1:/Illinois-Folio 208/hinds123 ID. Hinds, H. 123 Massive phase of the top bed of the Spergen and Warsaw formations, exposed on Camp creek near Eagle School, Bethel Township. McDonough County, Illinois. 1915. Figure 7 in U.S. Geological Survey. Folio 208. 1919. #1:/Illinois-Folio 208/hinds124 ID. Hinds, H. 124 Outcrop of St. Louis limestone: east of Birmingham, showing brecciation. Schuyler County, Illinois. 1915. Figure 8 in U.S. Geological Survey. Folio 208. 1919. #1:/Kansas-Folio 212/jwd00142 ID. Johnson, W.D. 142 Typical surface of the country underlain by the Ogahalla formation of the high plains of western Kansas, buffalo wallow; shallow circular depression in the level surface, in foreground. Haskell County, Kansas. 1897. Plate 2 in U.S. Geological Survey. Folio 212. 1920. #1:/New Mexico-Folio 214/lwt00346 ID. Lee, W.T. 346 Horseshoe and Barilla (Barela) Mesa as seen from Johnson Mesa. Smooth surface of Horseshoe Mesa; edge of the sheet of basalt which caps the mesa, narrow neck connecting Horseshoe Mesa with the higher Barilla Mesa from which the lava capping Horseshoe Mesa was probably extruded; recent landslide on steep slope of the mesa. Colfax County, New Mexico. 1922. Plate 6 in U.S. Geological Survey. Folio 214. 1922. #1:/New Mexico-Folio 214/lwt00355 ID. Lee, W.T. 355 Part of the south rim of Johnson Mesa, shows the columnar structure of the basalt exposed in the cross section of a lava stream that flow down an old valley, one side of which appears at the left. The trees in the foreground are 20 to 30 feet high. Colfax County, New Mexico. 1922. Plate 8 in U.S. Geological Survey. Folio 214. 1922. #1:/New Mexico-Folio 214/lwt00653 ID. Lee, W.T. 653 Cliff south of Van Houten showing relation of Raton formation to Trinidad sandstone where Vermejo formation is absent. The basal conglomerate of the Raton formation rests on Trinidad sandstone. #1:/New Mexico-Folio 214/lwt00786 ID. Lee, W.T. 786 East rim of Bartlett Mesa, looking northward toward older higher mesa. Shows the basalt cap of Bartlett Mesa, which lies at and beyond the northern border of the Raton quadrangle; and the outlier of the distant mesa. In the foreground is the slope of Sugarite Canyon, covered with scrub oak and scatter pines and spruces. Colfax County, New Mexico. 1922. Plate 5 in U.S. Geological Survey. Folio 214. 1922. #1:/New Mexico-Folio 214/lwt00794 ID. Lee, W.T. 794 Part of south rim of Barilla (Barela ) Mesa north of Yankee, shows the uneven surface characteristic of the highest mesa; two sheets of lava, the lower one regularly columnar, the upper one less so, and the dense growth of scrub oak and aspen that covers the slopes of the mesa. Colfax County, New Mexico. 1922. Plate 4 in U.S. Geological Survey. Folio 214. 1922. #1:/New Mexico-Folio 214/lwt00797 ID. Lee, W.T. 797 Towndrow Peak on Johnson Mesa, from the south. The peak consists of younger andesitic lava which overlies the basalt sheet that forms the flat surface of the mesa in the foreground. Colfax County, New Mexico. 1922. Plate 7 in U.S. Geological Survey. Folio 214. 1922. #1:/New Mexico-Folio 214/lwt00805 ID. Lee, W.T. 805 Johnson Mesa as seen from Raton, shows lowlands of the plain, high flat-topped tablelands of the mesa region and smooth brush-covered slopes of the mesas. The plain and the lower part of the mesa slopes are formed on Pierre shale and the precipitous mesa rim is the edge of the basalt sheet that caps the mesa. Under the rim the sandstones of the Raton formation crop out conspicuously at only one place, the formation being covered with brush and slide rock in most places. Colfax County, New Mexico. 1922. Plate 2 in U.S. Geological Survey. Folio 214. 1922. #1:/New Mexico-Folio 214/lwt00833 ID. Lee, W.T. 833 Relation of the Willow coal bed to other beds where the Vermejo formation is thin. The coal bed here is about 5 feet thick is separated by a few feet of shale from the underlying Trinidad sandstone. The basal conglomerate of the Raton formation rests with uneven base directly on the coal. Colfax County, New Mexico. 1922. Plate 10 in U.S. Geological Survey. Folio 214. 1922. #1:/New Mexico-Folio 214/lwt00836 ID. Lee, W.T. 836 North wall of Schomburg canyon; Trinidad sandstone overlain by shale and Willow coal bed, 8 feet thick of the Vermejo formation, on which rests unconformably the basal conglomerate of the Raton formation. Colfax County, New Mexico. 1922. Plate 9 in U.S. Geological Survey. Folio 214. 1922. #1:/New Mexico-Folio 214/lwt00866 ID. Lee, W.T. 866 North wall of Canadian Canyon, south of Gardener, a characteristic canyon wall ending in a promontory that overlooks the plain; the cottonwoods in the middle ground grow only near the stream. Pinon and juniper grow on the dry hillsides. Pierre shale on the lower slopes to right; Trinidad sandstone immediately above; Vermejo formation just left of center; lower part of Raton formation on the high ridge. Colfax County, New Mexico. 1922. Plate 3 in U.S. Geological Survey. Folio 214. 1922. #1:/Arkansas-Folio 215/mhd00004 ID. Miser, H.D. 4 "Ribboned" shale in the Womble shale near Cedar Glades, west of the Hot Springs district. The bedding is nearly vertical, and the ribboned effect is produced by cleavage nearly at right angles to the bedding. Similar shales occur in the Mazarn, Blakely, and Womble formations in the Hot Springs district. Garland County, Arkansas. 1914. Plate 4 in U.S. Geological Survey. Folio 215. 1922. #1:/Arkansas-Folio 215/mhd00006 ID. Miser, H.D. 6 Bedding surface of massive Arkansas novaculite cut by numerous joints, Hot Springs. Garland County, Arkansas. 1914. Plate 7 in U.S. Geological Survey. Folio 215. 1922. #1:/Arkansas-Folio 215/mhd00008 ID. Miser, H.D. 8 Crumpling in the Bigfork chert in road material quarry in north part of Hot Springs. Garland County, Arkansas. 1914. Plate 2 in U.S. Geological Survey. Folio 215. 1922. #1:/Arkansas-Folio 215/mhd00091 ID. Miser, H.D. 91 View looking east from Hot Springs Mountain, Indian Mountain in the near distance, the level crested ridges in the far distance terminate westward in the Mazarn basin at right. Garland County, Arkansas. 1914. Plate 1 in U.S. Geological Survey. Folio 215. 1922. #1:/Arkansas-Folio 215/mhd00100 ID. Miser, H.D. 100 View looking east from Hot Springs Mountain, Indian Mountain in the near distance, the level crested ridges in the far distance terminate westward in the Mazarn basin at right. Garland County, Arkansas. 1914. Plate 1 in U.S. Geological Survey. Folio 215. 1922. #1:/Arkansas-Folio 215/mhd00120 ID. Miser, H.D. 120 Crumpling in the middle division of the Arkansas novaculite on east side of Central Avenue, Hot Springs, Garland County, Arkansas. 1914. Plate 6 in U.S. Geological Survey. Folio 215. 1922. #1:/Arkansas-Folio 215/mhd00122 ID. Miser, H.D. 122 Massive beds of Hot Springs sandstone at city water pumping station 1 mile north of Hot Springs. Garland County, Arkansas. 1914. Plate 8 Cedar Glades in U.S. Geological Survey. Folio 215. 1922. #1:/Arkansas-Folio 215/mhd00123 ID. Miser, H.D. 123 Folded beds in the middle division of the Arkansas novaculite at the city water pumping station 1 mile north of Hot Springs. The hammer is lying on a bed of conglomerate. Garland County, Arkansas. 1914. Plate 5 in U.S. Geological Survey. Folio 215. 1922. #1:/Arkansas-Folio 215/mhd00344 ID. Miser, H.D. 344 Specimen of massive Arkansas novaculite: illustrating its perfect conchoidal fracture and fine-grained even texture. Natural size. Arkansas. 1914. Plate 3 in U.S. Geological Survey. Folio 215. 1922. #1:/Arizona-Folio 217/rfl00784 ID. Ransome, F.L. 784 Looking northwestward toward Pioneer Creek, Mescal range, showing dip slope on Dripping spring quartzite to right. Gila County, Arizona. 1911. Plate 3 in U.S. Geological Survey. Folio 217. 1923. #1:/Arizona-Folio 217/rfl00789 ID. Ransome, F.L. 789 Typical hillside exposure of the cherty Mescal limestone; in the Dripping Spring range, 2 miles south of Dripping Spring ranch. Gila County, Arizona. 1911. Plate 4 in U.S. Geological Survey. Folio 217. 1923. #1:/Washington, DC-Images/adams001 ID. Adams Building 1 Adams Building, U.S. Geological Survey, 1333-1335 F. Street, N.W. , Washington, D.C. 1917. Right photograph page 11 , Images of the U.S. Geological Survey, 1879-1979. #1:/Washington, DC-Images/adams023 ID. Adams Building 23 Pressroom personnel and presses, Adams Building, Washington, D.C. c. 1917. Lower right photograph page 12 , Images of the U.S. Geological Survey, 1879-1979. #1:/Alaska-Images/ake00358 ID. Alaska Earthquake no. 358 Landslide damage in the Turnagain Heights area of Anchorage, earthquake of March 27, 1964. Lower right photograph on page 43, Images of the U.S. Geological Survey, 1879- 1979. #1:/Arizona-Images/bry00467 ID. Bryan, K. 467 U.S. Geological Survey field vehicle used in the reconnaissance of the Papago country, Yuma County, Arizona. 1920. Lower left photograph page 29 , Images of the U.S. Geological Survey, 1879-1979. #1:/Missouri-Images/cmr01918 ID. Campbell, M.R. 1918 U.S. Geological Survey coal testing plant in "Mining Gulch" at the St. Louis Purchase Exposition. St. Louis, Missouri. 1904. Photograph on page 26 , Images of the U.S. Geological Survey, 1879-1979. #1:/Moon-Images/cea00002 ID. Cernan, E.A. 2 E.E. "Buzz" Aldrin, Jr. and a footpad of Lunar Module Eagle, Sea of Tranquility, Apollo XI Lunar Mission. Photo by N.E. Armstrong. Moon. 1969. Right cover photograph on cover of , Images of the U.S. Geological Survey, 1879-1979. #1:/Washington, DC-Images/chem0031 ID. Chemistry and Physics no 31 R.K. Bailey performing a chemical determination of potash, Hooe Building, Washington, D.C. c. 1917. Upper left photograph on page 12 , Images of the U.S. Geological Survey, 1879-1979. #1:/Wyoming-Images/hcj00578 ID. Hares, C.J. 578 Triangulation station on the summit of Garfield Peak, Rattlesnake Mountains, view includes geologist at work and two pack horses. Natrona County, Wyoming. c. 1913. Page 8 photograph, , Images of the U.S. Geological Survey, 1879-1979. #1:/Washington, DC-Images/hooe0001 ID. Hooe Building 1 Hooe Building, U.S. Geological Survey headquarters, 1330 F Street, N.W., Washington, D.C. 1917. Left photograph on page 11, , Images of the U.S. Geological Survey, 1879- 1979. #1:/Washington, DC-Images/hooe0012 ID. Hooe Building 12 Personnel in publication and map distribution: Hooe Building, Washington, D.C. c. 1917. Lower right photograph page 12, , Images of the U.S. Geological Survey, 1879- 1979. #1:/Washington, DC-Images/hooe0048 ID. Hooe Building 48 M. Grace Wilmarth compiling data for a lexicon of stratigraphic names, Hooe Building, Washington, D.C. c. 1917. Upper right photograph on page 12 , Images of the U.S. Geological Survey, 1879-1979. #1:/Hawaii-Images/kilv0062 ID. Kilauea Volcano 62 Sampling gases of freshly extruded lava from Kilauea Volcano by geologist standing at right, view also shows development of lava tube by accretion to lava levees. Lava accretes to the margin of a perched lava stream, confined by steep-sided levees about 1 m high, and brief surges add new material to the levee top. As the levees grow upward, they also tend to grow inward, narrowing the surface width of the stream. Photo by R.T. Holcomb, Hawaii County, Hawaii. March 5, 1974. Photograph page 35, Images of the U.S. Geological Survey, 1879-1979. #1:/Georgia-Images/lwb00151 ID. Lang, W.B. 151 Northwest corner of the Klondike mine, near McIntyre, operated by the Edgar Brothers. Power shovels in the background. Wilkinson County, Georgia. C. 1942. Lower left photograph on page 32, Images of the U.S. Geological Survey, 1879-1979. #1:/Georgia-Images/lwb00165 ID. Lang, W.B. 165 Drilling for bauxite, Big Sandy Creek, Wilkinson and Baldwin Counties, Georgia. June 1942. Upper left photograph on page 32, Images of the U.S. Geological Survey, 1879- 1979. #1:/Colorado-Images/lwt00446 ID. Lee, W.T. 446 U. S. Geological Survey camp, with personnel and horses, near the mouth of Oh-Be- Joyful Gulch, Slate River Valley. Gunnison County, Colorado. 1909. Lower right photograph on page 16 , Images of the U.S. Geological Survey, 1879-1979. #1:/United States-Images/magnet08 ID. Magnetic Detectors 8 J.R. Balsley operating magnetometer in flight. United States. Upper right photograph page 35, Images of the U.S. Geological Survey, 1879-1979. #1:/Utah-Images/mgr00686 ID. Mansfield, G.R. 686 U.S. Geological Survey camp in the snow at Horse Creek, sec. 19, T. 3 S., R. 40 E. Paradise Valley quadrangle. Bingham County, Utah. October 12, 1923. Upper left photograph page 29 , Images of the U.S. Geological Survey, 1879-1979. #1:/Louisana-Images/pef00010 ID. Patterson, E.F. 10 C.G. Glasscock Drilling Company's mobile platform, "Mr. Gus II" drilling on lease OCS 0134, block 48, Grand Isle area, off Louisiana. The barge and drilling equipment cost more than $7 million, contains 16 million pounds of steel and in transit has a displacement of 13,000 tons and a draft of about 25 feet. The barge is capable of drilling to a depth exceeding limitation of casing and drill pipe presently in use in water depth of 150 feet. The upper platform measures 104 feet by 173 feet and lower platform, or mat, 180 feet by 235 feet. The four steel columns are 235 feet long and 10 feet in diameter. Steel pipes 130 feet long and 7 feet in diameter are driven inside the four columns to give the barge greater stability when drilling on location. The barge is designed to withstand wind velocity of 125 miles per hour and a wave height of 55 feet when soil conditions are favorable. Drilling barge capable of completing six wells without changing position. August 6, 1957. Photograph on page 47, Images of the U.S. Geological Survey, 1879- 1979. #1:/California-Images/pef00223 ID. Patterson, E.F. 223 Dean Edson using a Twinplex stereoscopic plotting instrument to build up map information from pairs of aerial photographs. Topographic Division, U.S. Geological Survey. Sacramento County, California. 1957. Photograph on page 34, Images of the U.S. Geological Survey, 1879-1979. #1:/Washington DC-Images/pef00484 ID. Patterson, E.F. 484 Irving Friedman and W.D. Long experimenting with welded volcanic tuffs; Nuecleonics Laboratory, Geologic Division, U.S. Geological Survey, Washington, D.C. 1958. Upper left photograph page 36, Images of the U.S. Geological Survey, 1879-1979. #1:/Washington DC-Images/pef00489 ID. Patterson, E.F. 489 Henry Faul, geophysicist, adjusting a sample of biotite at the focal point of a mass spectrometer. Nuecleonics Laboratory, Geologic Division, U.S. Geological Survey, Washington, D.C. 1958. Upper right photograph page 36, Images of the U.S. Geological Survey, 1879-1979. #1:/Washington DC-Images/pef00501 ID. Patterson, E.F. 501 Alfred F. Hoyte, physicist, operating a single channel analyzer to count the alpha-particle disintegrations in a specimen for radiometric-age determination. Nuecleonics Laboratory, Geologic Division, U.S. Geological Survey, Washington, D.C. 1958. Lower left photograph page 36, Images of the U.S. Geological Survey, 1879-1979. #1:/Washington DC-Images/pef00526 ID. Patterson, E.F. 526 Isidore Adler, chemist, operates a gonimeter used for x-ray fluorescence analysis of individual grains of mineral specimens, Geologic Division, U.S. Geological Survey, Washington, D.C. 1958. Lower right photograph page 36, Images of the U.S. Geological Survey, 1879-1979. #1:/New Mexico-Images/pef00654 ID. Patterson, E.F. 654 G.D. Robinson examining an outcrop of the Chinle Formation (Triassic), Cimarroncito Creek, Philmont Scout Ranch, Colfax County, New Mexico. 1958. Figure 71-A in U.S. Geological Survey. Professional paper 505. 1964; Upper photograph page 37, Images of the U.S. Geological Survey, 1879-1979. #1:/Washington DC-Images/pef00756 ID. Patterson, E.F. 756 R.William Bromery, geophysicist, inspecting magnetometer detecting unit, U.S. Geological Survey's "flying laboratory", Washington, D.C. 1960. Lower left photograph page 35, Images of the U.S. Geological Survey, 1879-1979. #1:/Arizona-Images/shoe0018 ID. Shoemaker, E.M. 18 Rubber raft used in a resurvey of the Colorado River, in Marble Canyon, near the mouth of Little Nankoweap Creek. Photo by H.G. Stephens. Coconino County, Arizona. September 6, 1968. Powell Centennial Exhibit. Photograph on page 45, Images of the U.S. Geological Survey, 1879-1979. #1:/United States-Images/topa0750 ID. Topography A 750 Old time topographer at work with an alidade and plane table: center photograph on cover of Images of the U.S. Geological Survey, 1879-1979. #1:/U.S. Collection-U.S. Geological Survey/gesu0014 ID. U.S. Geological Survey 14cp House on Oak Park Drive in San Francisco damaged by landsliding. House is on the toe of the slide, and the major part of the landslide is out of view to the right. City and County of San Francisco. California. June 1, 1979. Upper photograph on page 58 in U.S. Geological Survey. Professional paper 1240-B. 1981. #1:/Taylor F.A. Collection/gesu0015 ID. U.S. Geological Survey 15cp Oblique aerial view of failure of road fill on Interstate Highway 80, east of San Francisco. View includes machinery at work. Photo by F.A. Taylor. City and County of San Francisco, California. ca. 1971. Published page 58, lower, in U.S. Geological Survey. Professional paper 1240-B. 1981. #1:/Colorado Geological Survey Collection/gesu0016 ID. U.S. Geological Survey 16cp Crack in wall of public building caused by expansive soils. Person's hand for scale. Courtesy of Colorado Geological Survey. Colorado.n.d. Left photograph on page 67 in U.S. Geological Survey. 1240-B. 1981. #1:/Colorado Geological Survey Collection/gesu0018 ID. U.S. Geological Survey 18cp Vertical displacement of 1 inch along crack in concrete floor slab caused by expansive soils. Pen for scale. Courtesy of Colorado Geological Survey. Colorado. Right photograph on page 67 in U.S. Geological Survey. 1240-B. 1981. #1:/U.S. Collection-U.S. Geological Survey/gesu0019 ID. U.S. Geological Survey 19cp Characteristic soft puffy expansive soil showing desiccation cracks. Pen for scale. Colorado. Photograph on page B71 in U.S. Geological Survey. Professional paper 1240-B. 1981. #1:/Blanchard P. Collection/gesu0028 ID. U.S. Geological Survey 28cp Thirteenth South Street between West Temple and Second West, looking east, Salt Lake City. The conduit beneath Thirteenth South is unable to handle the runoff and spouts water into the street, sandbagged as a canal. Photo by P. Blanchard. Salt Lake County, Utah. May 28, 1983. #1:/Delaney S.C. Collection/gesu0035 ID. U.S. Geological Survey 35cp Earth science investigations of hazardous waste disposal sites provide site-specific geohydrologic data as well as generic information on the effectiveness of investigation techniques, monitoring systems and etc. Photo by S.C. Delaney, EPA. United States. ca. 1983. #1:/Fossils/gesu0036 ID. U.S. Geological Survey 36 Fossils. Platelet from a planktic calcaerous alga subspecies, Pemma basquense basquense. #1:/USGS Collection/gesub036 ID. U.S. Geological Survey 36bw A SEM of an important microfossil: A platelet from a planktic calcaerous alga subspecies, Pemma basquense basquense.n.d. Figure 44-A, page 97 in U.S. Geological Survey. Annual Report 1976. #1:/Fossils/gesu0037 ID. U.S. Geological Survey 37 Fossils. Ostracode (a microscopic crustacean) female of Acetoleberis plummeri. #1:/Fossils/gesu0038 ID. U.S. Geological Survey 38 Fossils. Foraminifer (shelled protozoan), Guembelitria cretacea. #1:/USGS Collection-Gilman Zinc Mine/gesu0087 ID. U.S. Geological Survey 87ct Eagle River running through mining area at Gilman zinc mine on Battle Mountain, between Redcliff and Minturn. Eagle County, Colorado. ca. 1980. #1:/USGS Collection-Gilman Zinc Mine/gesu0088 ID. U.S. Geological Survey 88ct Different view of Eagle River running through mining area at Gilman zinc mine on Battle Mountain, between Redcliff and Minturn. Eagle County, Colorado. ca. 1980. #1:/USGS Collection/gesu0139 ID. U.S. Geological Survey 139 Home lost in land collapse. Sinkhole that formed was 520 feet long, 125 feet wide, and 60 feet deep. Bartow, Polk County, Florida. May 22, 1967. #1:/USGS Collection/gesu0140 ID. U.S. Geological Survey 140 Possibly the nation's largest recent sinkhole - the "December Giant" measuring 425 feet long, 350 feet wide and 150 feet deep - formed in central Alabama. USGS scientists have joined State officials in mapping and monitoring the growing sinkhole problems of central and northern Alabama. Shelby County, Alabama. December 2, 1972. #1:/Canyon de Chelly National Monument/gesu0171 ID. GESU 171 Canyon de Chelly National Monument, Arizona. Spider Rock, a monolith composed of De Chelly Sandstone of Permian age. Photo by D. Reed. #1:/Alaska Glaciers/gesu0183 ID. U.S. Geological Survey 183 Alaska Glaciers. The crevassed surface of Columbia Glacier is severely shattered due to its relatively high rate of flow.U.S. Geological Survey photogrammetrists were able to identify distinct crevasse patterns, even in winter photography, to measure the motion. Columbia Glacier is southwest of Valdez in the Chugach Mountains. 1975. #1:/Kentucky-Images/gesu0206 ID. U.S. Geological Survey 206 Landsat –1 image showing the Mississippi and Ohio Rivers and their junction. Kentucky and Barkley lakes visible at right: (Landsat image 1124-16061, band 7) Illinois, Kentucky and Missouri. November 24, 1972. Photograph on page 50, Images of the U.S. Geological Survey, 1879-1979. #1:/Crater Lake National Park/gesu0334 ID. U.S. Geological Survey 334 Crater Lake National Park, Oregon. Crater Lake. Photograph courtesy of the Washington National Guard. #1:/Alaska Glaciers/gesu0425 ID. U.S. Geological Survey 425 Alaska Glaciers. Folds in Malaspina Glacier, which is northwest of Yakutat in the St. Elias Mountains. Mount St. Elias in the background. The scale of folding in the glacier is in miles. August 25, 1969. #1:/Wupatki National Monument/gesu0457 ID. U.S. Geological Survey 457 Wupatki National Monument, Arizona. Main ruin of Wupatki. Wupatki means long house in the Hopi language. Wupatki is the most important ruin in the San Francisco Mountain region. It was occupied longer than other ruins of the region, and the peculiar conditions of extreme dryness of the climate and excellent drainage have preserved wood, textiles and perishable material to an unusual extent. Various rooms in this structure are dated between 1087 and 1197. Abandonment took place around 1250. Photo by G.A. Grant, U.S. National Park Service, September 1935. #1:/US Geological Survey Collection-Kennecott Copper Mine/gesu0497 ID. U.S. Geological Survey 497 One of several different views of the vast open-pit Kennecott copper mine at Bingham Canyon, where gold is recovered as a by-product. Salt Lake County, Utah 1971. #1:/US Geological Survey Collection-Kennecott Copper Mine/gesu0498 ID. U.S. Geological Survey 498 One of several different views of the vast open-pit Kennecott copper mine at Bingham Canyon, where gold is recovered as a by-product. Salt Lake County, Utah 1971. #1:/US Geological Survey Collection-Kennecott Copper Mine/gesu0499 ID. U.S. Geological Survey 499 One of several different views of the vast open-pit Kennecott copper mine at Bingham Canyon, where gold is recovered as a by-product. Salt Lake County, Utah 1971. #1:/US Geological Survey Collection-Kennecott Copper Mine/gesu0500 ID. U.S. Geological Survey 500 One of several different views of the vast open-pit Kennecott copper mine at Bingham Canyon, where gold is recovered as a by-product. Salt Lake County,Utah 1971. #1:/Fossils/gesu0543 ID. U.S. Geological Survey 543 Fossils. Fragment of a scale-bearing primitive jawless fish given the name Anatolepis. The specimen is about 0.5 millimeter long (about 0.02 inch). Collected from Wahwah Limestone in Utah. Circa 1978. #1:/Alaska Glaciers/gesu0544 ID. U.S. Geological Survey 544 Alaska Glaciers. Hubbard Glacier, which is north-northeast of Yakutat in the St. Elias Mountains, including terminus and medial moraines. Circa 1978. #1:/USGS Collection/gesu0583 ID. U.S. Geological Survey 583 Oblique aerial view of crevasses at an ice-fall on Le Conte Glacier. Chelan County, Washington.n.d. #1:/Greenland/gesu0584 ID. U.S. Geological Survey 584 Greenland. Interior view of a crevasse in Blue Ice Valley on the Greenland Ice Sheet. A glaciologist can be seen descending a rope ladder, 65 feet below the ice sheet surface. August 1955. #1:/USGS Collection-Charleston, South Carolina, 1886 Earthquake/gesu0589 ID. U.S. Geological Survey 589 People standing in front of damaged Goose Creek Church, Charleston earthquake of August 31, 1886. Charleston County, South Carolina. 1886. Published on page 53 in US Geological Survey. Yearbook, Fiscal Year 1983. 1984. #1:/USGS Collection-Charleston, South Carolina, 1886 Earthquake/gesu0590 ID. U.S. Geological Survey 590 Men and damaged warehouse, Charleston earthquake of August 31, 1886. Charleston County, South Carolina. 1886. Published on page 54 in US Geological Survey. Yearbook, Fiscal Year 1983. 1984. #1:/Yemen Earthquake 1982/gesu0733 ID. U.S. Geological Survey 733 Yemen Earthquake 1982. Much of the unreinforced stone masonry in Risabah collapsed during the magnitude 6.0 shock of December 13, 1982. The city was approximately 6 miles from the epicenter. 1982. #1:/Alaska Glacier/gesu0923 ID. U.S. Geological Survey 923 Oblique aerial view showing Yentna Glacier, which is a fine example of a large valley glacier having many tributaries. The even, undistorted medial moraines mark the juncture of ice streams from adjacent tributaries. In the background is Mount Foraker (5,300 m or 17,400 ft). Yentna district, Cook Inlet region, Alaska. n.d. Published on page 5 in U. S. Geological Survey. Glaciers: A Water Resource, by Mark Meier and Austin Post. 1988. #1:/Alaska Glacier/gesu0924 ID. U.S. Geological Survey 924 Oblique aerial view of Gulkana Glacier, Alaska Range, which was studied intensively by the Geological Survey as part of the contribution of the International Hydrological Decade. Donnelly district, Yukon region, Alaska. n.d. Published on pages 18-19 in U. S. Geological Survey. Glaciers: A Water Resource, by Mark Meier and Austin Post. 1988. #1:/Alaska Glacier/gesu0925 ID. U.S. Geological Survey 925 The largest glacier in the United States is the Bering Glacier, near Cordova, Alaska. With its associated icefield feeders it is 203 km (126 miles) long and covers an area of more than 5,000 square kilometers (1,900 square miles). Only a fraction of the lower part of this immense glacier is shown in this view, looking northeast to where the glacier passes between Waxell Ridge (left) and Barkley Ridge (right). Alaska Gulf region, Alaska, n.d. Published on pages 22-23 in U. S. Geological Survey. Glaciers: A Water Resource, by Mark Meier and Austin Post. 1988. #1:/Alaska Glacier/gesu0929 ID. U.S. Geological Survey 929 Small glaciers in the North Cascades are important sources of summer streamflow. Oblique aerial view. Washington. 1988. Published on page 20 in U. S. Geological Survey. Glaciers: A Water Resource, by Mark Meier and Austin Post. 1988. #1:/Alaska Glacier/gesu0930 ID. U.S. Geological Survey 930 Oblique aerial view of Tikke Glacier in the Alsek Ranges of British Columbia. Canada. n.d. Published on page 13 in U. S. Geological Survey. Glaciers: Water Resource, by Mark Meier and Austin Post. 1988. #1:/Alaska Glacier/gesu0931 ID. U.S. Geological Survey 931 Oblique aerial view. Malaspina Glacier, St. Elias Mountains, is a piedmont glacier. The scale of folding in the glacier is in miles. Yakutat district, Alaska Gulf region, Alaska. September 17, 1966. (See USGS no. 426 for better print; photo by A. Post, no. 6611-156) Portion published on pages 11-12 in U. S. Geological Survey. Glaciers: A Water Resource, by Mark Meier and Austin Post. 1988. #1:/Alaska Glacier/gesu0932 ID. U.S. Geological Survey 932 The vigorous Margerie Glacier in Glacier Bay National Monument is a good example of a steep, active valley glacier. Glacier Bay district, Southeastern Alaska region, Alaska, n.d. Published on page 21 in U. S. Geological Survey. Glaciers: A Water Resource, by Mark Meier and Austin Post. 1988. #1:/California-Images/usrs0112 ID. U.S. Reclamation Service 112 Artesian well of the Riverside Water Company: near San Bernardino. San Bernardino County, California. c. 1900. Photograph on page 23 , Images of the U.S. Geological Survey, 1879-1979. #1:/Colorado-Images/usrs0413 ID. U.S. Reclamation Service 413 Uncompahgre Irrigation Project, serving the Albin Ranch, 1 mile south of Table Mountain, southwest Colorado. Photograph on page 24 , Images of the U.S. Geological Survey, 1879-1979. #1:/Washington-Images/h2op0072 ID. Water Supply Paper, 72 Water-data station on Columbia River, near Trinidad. Grant County, Washington. Left photograph on page 31. #1:/Tennessee-Images/h2op0103 ID. Water Supply Paper, 103 Truck mounted current meter and sounding weight, on bridge over Mississippi River at Memphis, Shelby County, Tennessee. 1938. Upper right photograph on page 31, Images of the U.S. Geological Survey, 1879-1979. #1:/Utah-Images/winc0357 ID. Winchester, D.E. 357 U.S. Geological Survey geologists trench sampling part of the outcrop in Winchester 383, near Watson. Dragon quadrangle, Uintah County, Utah. 1915. Right photograph page 28 , Images of the U.S. Geological Survey, 1879-1979. #1:/United States-Images/cbr00012 ID. Colby, B.R. 12 Depth-integrating sediment sampler attached to a wading rod, scientist at work. United States. Figure 11-B in U.S. Geological Survey. Water-supply paper 1373. 1956. Photograph on page 44, Images of the U.S. Geological Survey, 1879-1979. #1:/Alaska-Images/cpr00001 ID. Carlson, P.R. 1 Piston coring from R/V Sea Sounder in the Gulf of Alaska by members of the U.S. Geological Survey. Alaska. 1977. Photograph on page 49, Images of the U.S. Geological Survey, 1879-1979. #1:/Moon-Images/cea00001 ID. Cernan, E.A. 1 H.H. "Jack" Schmitt at Station 6, Taurus-Littrow valley, Apollo XVII Lunar Mission. Moon. 1972. Photograph on page 51, Images of the U.S. Geological Survey, 1879-1979. #1:/Pakistan-Images/cfe00001 ID. Clarke, F.E. 1 Persian water wheel in shallow well, Indus Plains, Pakistan. c. 1967. Figure 2 in U.S.Geological Survey. Water-supply paper 1608-L. 1969. Upper left photograph page 41, Images of the U.S. Geological Survey, 1879-1979. #1:/Colorado-Images/ghs00285 ID. Gale, H.S. 285 Sandstone block containing a large fossil palm leaf, found at the Coryell Coal mines. Block is on ground in front of a group of miners. Newcastle. Garfield County, Colorado. 1907. Photograph on page 19, , Images of the U.S. Geological Survey, 1879-1979. #1:/Libya-Images/ggh00041 ID. Goudarzi, G.H. 41 Aerial view of sand dunes in the Ubari Sand Sea, between Brach and Ubari, this sand sea covers an about 80,000 square kilometers; small plane for scale. Fezzan district, Libya. c. 1958. Figure 33 in U.S. Geological Survey. Professional paper 660. 1970. Photograph on page 40, Images of the U.S. Geological Survey, 1879-1979. #1:/South Yemen-Images/gje00009 ID. Greenwood, J.E.G.W. 9 Workers excavating salt at Lai'adin Salt Dome. Aden Protectorate (South Yemen). Arabian Peninsula. C. 1961. Figure 26 in U.S. Geological Survey. Professional paper 560-C. 1967. Lower left photograph page 41, Images of the U.S. Geological Survey, 1879-1979. #1:/Antarctica-Images/hwb00387 ID. Hamilton, W.B. 387 Pyramid Mountain and west wall of Beacon Dry Valley; a diabase dike turns into a sill that encloses a large wedge of sandstone to right. The lower diabase sill of the east (right) face of Pyramid Mountain maintains its stratigraphic position along the wall of Beacon Dry Valley. The upper two sills of Pyramid Mountain rise in the section to the south (left) and are present in the crest beyond the inner valley wall. The base of the cliffs marks the contact between the sandstone of Pyramid Mountain and the sandstone of New Mountain. Units in the Beacon Sandstone; sandstone of Finger Mountain; sandstone of Pyramid Mountain (forming cliffs) and sandstone of New Mountain; diabase: geologist and equipment in foreground. Photo by P.T. Hayes. Taylor Glacier region, Victoria Land, Antarctica. November 1958. Figure 7 in U.S. Geological Survey. Professional paper 456-A. 1963. Part of figure 6 in U.S. Geological Survey. Professional paper 456-B. 1965. Photograph page 39, Images of the U.S. Geological Survey, 1879-1979. #1:/Pakistan-Images/hjw00002 ID. Hood, J.W. 2 Persian water well, a widely used type of open well in Pakistan. Well generally are shallow but at some places are as deep as 200 feet. Naturally bare sand in foreground and background contrast strongly with irrigated crops. Photo by S.A.T. Kazmi. Pakistan. c. 1963. Figure 7 in U.S. Geological Survey. Water-supply paper 1608-K. 1970. Upper right photograph page 41, Images of the U.S. Geological Survey, 1879-1979. #1:/Brazil-Images/jwdj0689 ID. Johnston, W.D., Jr. 689 Hauling chrome ore to Campo Formosa, Bahia, Brazil. 1941. Lower right photograph page 41, Images of the U.S. Geological Survey, 1879-1979. #1:/Washington-Images/jfo00129 ID. Jones, F.O. 129 Aerial view of the scars of huge landslides that cut into a stream terrace eroded on varved silt and clay. View is towards the southwest. Franklin D. Roosevelt Lake is on the left. The lake is drawn down about 60 feet from full reservoir level of 1290 feet exposing the underwater portions of the landslide. The flat surfaces extending outward from the landslide scarps are underlain predominately by landslide and mudflow debris that was deposited below the lake level when the surface of the lake was higher. View just south of the mouth of Sherman Creek. Columbia River Landslide Project. Ferry County, Washington. April 21, 1953. Photograph on page 42, Images of the U.S. Geological Survey, 1879-1979. #1:/Washington DC-Images/pef00755 ID. Patterson, E.F. 755 DC-3 "flying laboratory" used in aeromagnetic surveys. National Airport. Washington, D.C. 1960. Upper left photograph on page 35, Images of the U.S. Geological Survey, 1879-1979. #1:/Maryland-Images/pef00760 ID. Patterson, E.F. 760 Airborne magnetic survey of the Patuxent River area by Aircraft 94 at 2000 feet altitude: Maryland. 1960. Lower right photograph page 35, Images of the U.S. Geological Survey, 1879-1979. #1:/Colorado-Images/rfl00504 ID. Ransome, F.L. 504 Gold Hill from southwest slope of Tenderfoot Hill, Cripple Creek district, Teller County, Colorado. October 10, 1903. Upper right photograph on page 4, , Images of the U.S. Geological Survey, 1879-1979. #1:/United States-Images/san00228 ID. Sayre, A.N. 228 G.M. Schwartz operating resistivity apparatus. United States. Upper right photograph on page 32, Images of the U.S. Geological Survey, 1879-1979. #1:/Wyoming-Images/sar00509 ID. Schultz, A.R. 509 U.S. Geological Survey field party in white sand ridges, a hard pull from the white sands to the crest of the low sand ridges. Note the depth to which the wheels sink and the sank kicked up by the horses. T. 24 N., R. 103 W. Francis quadrangle, Sweetwater County, Wyoming. c. 1910. Upper left photograph page 16, Images of the U.S. Geological Survey, 1879-1979. #1:/Alaska-Images/sps00753 ID. Smith, P.S. 753 U.S. Geological Survey party lining boat and supplies up the Alatna River, 8 miles below Alatna-Noatak portage. Alatna district, Yukon region, Alaska. July 21, 1911. Lower photograph page 25, Images of the U.S. Geological Survey, 1879-1979. #1:/New Mexico-Images/sjr00344 ID. Stacy, J.R. 344 Geologist measuring dip of outcrop of Dakota Sandstone, of Cretaceous age, above Crater Lake Base camp, Philmont Scout Ranch area; Tooth of Time quadrangle. Colfax County, New Mexico. August 1958. Left photograph on page 37, Images of the U.S. Geological Survey, 1879-1979. #1:/New Mexico-Images/sjr00345 ID. Stacy, J.R. 345 Close-up of geologist measuring dip of Dakota Sandstone above Crater Lake Base camp; dip of formation here is 55 degrees, Philmont Scout Ranch area; Tooth of Time quadrangle. Colfax County, New Mexico. August 1958. Lower photograph on page 37, Images of the U.S. Geological Survey, 1879-1979. #1:/Colorado-Images/sjr00577 ID. Stacy, J.R. 577 Ripple marks on Dakota Sandstone (Cretaceous), one and one-half miles north of Morrison. Jefferson County, Colorado. October 16, 1966. Photograph on page 8 in U.S. Geological Survey. Mountains and plains: Denver's geologic setting. 1967. Right photograph on page 48, Images of the U.S. Geological Survey, 1879-1979. #1:/California-Images/topa0240 ID. Topography A 240 U.S. Geological Survey topographic leveling party, headed by R.A. Farmer on the slopes of Mount Whitney, elevation 14, 500 feet: Photo by Department of Agriculture, Experiment Stations, Berkeley. Inyo or Tulare County, California. August 1905. Page 10 photograph. Images of the U.S. Geological Survey, 1879-1979. #1:/Arizona-Images/topd0003 ID. Topography D 3 Trucking the "Grand" along the old Mormon "Dugway" opposite the mouth of the Paria River, during the exploration of the Colorado River by a U.S. Geological Survey party led by Claude Birdseye. Coconino County, Arizona. 1923. Upper right photograph page 29 , Images of the U.S. Geological Survey, 1879-1979. #1:/California-Images/usrs0169 ID. U.S. Reclamation Service 169 Oilfield in southern California, photograph by J.P. Lippincott. Photograph on page 27 , Images of the U.S. Geological Survey, 1879-1979. #1:/Washington-Images/h2or0059 ID. Water Resources Division 59 Scott Wesley backpacking a mountain precipitation gage on South Cascade Glacier. Chelan and Skagit Counties, Washington. July 17, 1961. Photograph on page 46, Images of the U.S. Geological Survey, 1879-1979. #1:/Colorado-Images/h2op0027 ID. Water Supply Paper, 27 Cable-suspended, stream-gaging car used in measuring velocity of streams with a current meter, Arkansas River near Canyon City. Fremont County, Colorado. 1890. Plate 1-B in U.S. Geological Survey. Water-supply paper 56. 1901; on page 22 , Images of the U.S. Geological Survey, 1879-1979. #1:/Minnesota-Images/h2op0077 ID. Water Supply Paper, 77 O.H. Jeffers using reel and sled-mounted equipment to measure discharge through the ice of the Mississippi River at St. Paul. Ramsey County, Minnesota. C. 1940. Lower right photograph on page 31, Images of the U.S. Geological Survey, 1879-1979. #1:/Washington-Images/wil0037b ID. Willis, B. 37b Forest scene in the Skagit Valley, north of Hamilton. Skagit County, Washington. Upper right photograph page 20 , Images of the U.S. Geological Survey, 1879-1979. #1:/Washington-Images/wil00088 ID. Willis, B. 88 Panorama of Cascade Range from north to southwest, from summit of Mount Hawkins, geologist sitting at right. Snoqualmie quadrangle, Kittitas County, Washington. Photograph on page 21 , Images of the U.S. Geological Survey, 1879-1979. #1:/Idaho-Images/wil00135 ID. Willis, B. 135 Placer mining at Gibbonsville, Lemhi County, Idaho. c. 1899. Photograph on page 17, , Images of the U.S. Geological Survey, 1879-1979. #1:/Arizona-Images/wij00143 ID. Witkind, I.J. 143 Monument Valley, with Oljeto Wash in the foreground and one of the Mittens and Mitchell Butte at right center. Navajo County, Arizona. C. 1952. Photograph on page 33, Images of the U.S. Geological Survey, 1879-1979. #1:/Alabama-Folio 221/butc0407 ID. Butts, C. 407 Shale in Gasper formation with overlying Hartselle sandstone, Red Gap, just east of Gate City, northeast environs of Birmingham, the Red Gap fault, on which the movement causing the earthquake in 1914 took place, is near and along the highway. Jefferson County, Alabama. 1925. Plate 19 in U.S.Geological Survey. Folio 221. 1927 #1:/Alabama-Folio 221/butc0490 ID. Butts, C. 490 Brecciated Ketona dolomite in quarry of Republic Iron & Steel Co., Thomas, 4 miles northeast of Wylam. Jefferson County, Alabama. 1925. Plate 2 in U.S.Geological Survey. Folio 221. 1927 #1:/Alabama-Folio 221/butc829a ID. Butts, C. 829a Cavernous fossiliferous chert characteristic of Chepultepec dolomite, from east base of Newhope ridge in gorge of Buck Creek between Helena and Pelham. Shelby County, Alabama. 1925. Plate 6 in U.S.Geological Survey. Folio 221. 1927. #1:/Alabama-Folio 221/butc830a ID. Butts, C. 830a Boulder of dense tough chert characteristic of Copper ridge dolomite, from Newhope ridge, gorge of Buck Creek between Helena and Pelham. Shelby County, Alabama. 1925. Plate 3 in U.S.Geological Survey. Folio 221. 1927. #1:/Alabama-Folio 221/butc0835 ID. Butts, C. 835 Quartz, chert, and limestone pebbles in basal part of Lenoir limestone: between wagon road and railroad near south edge of Bessemer quadrangle, in Cahaba valley. Shelby County, Alabama. 1925. Plate 7 in U.S.Geological Survey. Folio 221. 1927. #1:/Alabama-Folio 221/butc1454 ID. Butts, C. 1454 Shale, sandstone, and conglomerate parting between Big seam and Irondale seam of iron ore, Helen Bess mine, in northeast environs of Birmingham, looking northeast, slab with pebbles shown in Butts photo 1455. Jefferson County, Alabama. 1925. Plate 15 in U.S.Geological Survey. Folio 221. 1927. #1:/Alabama-Folio 221/butc1455 ID. Butts, C. 1455 Slab of pebbles from parting between Big seam and Irondale seam shown in photo 1454. The pebbles are of the same kind of limestone and are full of the same fossils as the limestone capping the Irondale seam at Ruffner No. 1 mine, northwest Jefferson County, Alabama. 1925. Plate 18 in U.S.Geological Survey. Folio 221. 1927. #1:/Alabama-Folio 221/butc1842 ID. Butts, C. 1842 Bed of volcanic ash (bentonite) in Chickamauga limestone at Twentieth Street, Birmingham, near summit of Red Mountain on west side, looking east; the bentonite is a yellowish clay between the two prominent layers of limestone. Jefferson County, Alabama. 1925. Plate 17 in U.S.Geological Survey. Folio 221. 1927. #1:/Alabama-Folio 221/butc1843 ID. Butts, C. 1843 Red Mountain formation at base of cut 20 feet above bottom of the formation, Twentieth Street cut at summit of Red Mountain, Birmingham, looking east. Includes 20-foot bed of sandstone in the middle part below the Big seam shown in lower left corner of photo 1854, with bouldery sandstone in bottom. Jefferson County, Alabama. 1925. Plate 12 in U.S.Geological Survey. Folio 221. 1927. #1:/Alabama-Folio 221/butc1847 ID. Butts, C. 1847 Quarry at Vanns, 2 miles north of Trussville and 16 miles northeast of Birmingham. Fort Payne chert at bottom, Warsaw limestone about 90 feet thick next above, at top of quarry is about 7 feet of oolitic and slight asphaltic limestone with Talarocrinus, of Gasper age. Between the Warsaw and Gasper is an unconformity due to the absence of the St. Louis and Ste. Genevieve limestones. Above the oolitic bed is about 100 feet of dark to black shale constituting the main body of the Gasper in Birmingham Valley. The spur is capped by Hartselle sandstone. Jefferson County, Alabama. 1925. Plate 20 in U.S.Geological Survey. Folio 221. 1927. #1:/Alabama-Folio 221/butc1853 ID. Butts, C. 1853 Part of Red Mountain formation immediately below big seam of iron ore, Twentieth Street cut, Birmingham, at summit of Red Mountain, looking northeast; this part is of Brassfield (Medina) age. Jefferson County, Alabama. 1925. Plate 11 in U.S.Geological Survey. Folio 221. 1927. #1:/Alabama-Folio 221/butc1857 ID. Butts, C. 1857 Big ore seam (at right) overlain by Red sandstone and shale with conglomeratic medium bedded Red sandstone at top, summit of Red Mountain and Twentieth Street, Birmingham, looking southwest. Jefferson County, Alabama. 1925. Plate 13 in U.S.Geological Survey. Folio 221. 1927 #1:/Alabama-Folio 221/butc1860 ID. Butts, C. 1860 Big seam of iron ore, Twentieth Street, Red Mountain, Birmingham, looking southeast. Jefferson County, Alabama. 1925. Plate 14 in U.S.Geological Survey. Folio 221. 1927. #1:/Alabama-Folio 221/butc1863 ID. Butts, C. 1863 Cut on mountain terrace road in northeastern environs of Birmingham, looking southeast, showing position of bed of volcanic ash (bentonite) and the overlying limestone of Trenton age. The bentonite bed is about 40 feet above the bottom of the thin-bedded limestone shown in the upper part of photos 1869 and 1870. Jefferson County, Alabama. 1925. Plate 10 in U.S.Geological Survey. Folio 221. 1927. #1:/Alabama-Folio 221/butc1866 ID. Butts, C. 1866 Old quarry in Chickamauga limestone half a mile north of Gate City, and 5.5 miles northeast of center of Birmingham, west face of Red Mountain, looking northeast; limestone of Lowville (lower Black River) age above, and of Stones River (Chazyan) age below. Contact marked by rubbly argillaceous bed cropping out at left margin of quarry at roots of two small trees. Rubbly bed swells out to right into small coral reef in lower right hand corner believed to be of Black River age. Reef composed of a jumbled mass of large stromatocerium and Columnaria heads with which are mixed abundant smaller heads of Solenopora. Bryozora and brachipods are fairly abundant. Cryptopharmus antiquates Raymond or Beatricia Ulrich (common) and Tetradium cellullosum (abundant) two guide fossils of the Lowville, in the 20 feet of thin beds beginning about 10 feet above rubbly bed. Great stratigraphic hiatus between Lowville and Stones River beds shown here due to absence of Holston marble, Athens shale. Tellico sandstone and Sevier shale (Ottosee shale of Ulrich) of east Tennessee, aggregating as a maximum 7,000 or 8,000 feet in thickness. Jefferson County, Alabama. 1925. Plate 8 in U.S.Geological Survey. Folio 221. 1927. #1:/Alabama-Folio 221/butc1869 ID. Butts, C. 1869 Old quarry at mountain terrace, in northeastern environs of Birmingham, looking east, showing same succession as in photos 1866 and 1867; thinner layers at top possibly of upper Black River age, rubbly bed and Stones River-Lowville contact at level of man's head. Jefferson County, Alabama. 1925. Plate 9 in U.S.Geological Survey. Folio 221. 1927. #1:/Alabama-Folio 221/butc2702 ID. Butts, C. 2702 Cryptozoon of c. proliferum from Copper ridge dolomite mosteller columbiana quadrangle, about 5 miles east of Shelby Shelby County, Alabama. 1925. Plate 5 in U.S.Geological Survey. Folio 221. 1927. #1:/Alabama-Folio 221/butc2703 ID. Butts, C. 2703 Cryptozoon resembling c. undulatun; from Copper ridge dolomite near Huffman, 7 miles northeast of Birmingham. Jefferson County, Alabama. 1925. Plate 4 in U.S.Geological Survey. Folio 221. 1927. #1:/South Dakota-Folio 219/dnh00452 ID. Darton, N.H. 452 Characteristic erosion forms in massive granite at Sylvan Lake view northeastward: Harney Peak in distance. Custer County, South Dakota.1898. Plate 1 in U.S.Geological Survey. Folio 219. 1925. #1:/South Dakota-Folio 219/dnh00481 ID. Darton, N.H. 481 Natural Bridge in banded Unkpapa sandstone 2 miles west of Buffalo Gap, shows massive structure and cross bedding of formation. Custer County, South Dakota.1898. Plate 16 in U.S.Geological Survey. Folio 219. 1925. #1:/South Dakota-Folio 219/dnh00576 ID. Darton, N.H. 576 Great arch of upper purplish sandstone member of Deadwood formation in lower cliff and white Pahasapa limestone in upper cliffs in canyon of Little Elk Creek, 2 miles west of Piedmont, view northeastward. Meade County, South Dakota.1898. Plate 28 in U.S. Geological Survey. Folio 219. 1925. #1:/South Dakota-Folio 219/dnh00620 ID. Darton, N.H. 620 The Needles: erosion forms of massive granite at south end of Harney Peak ridge, east of Sylvan Lake, view southeastward. Custer County, South Dakota.1898. Plate 2 in U.S. Geological Survey. Folio 219. 1925. #1:/South Dakota-Folio 219/dnh00746 ID. Darton, N.H. 746 Beecher Rocks: Pinnacled erosion form of granite dike 6 miles south of Custer. Custer County, South Dakota.1898. Plate 3 in U.S. Geological Survey. Folio 219. 1925. #1:/South Dakota-Folio 219/dnh00793 ID. Darton, N.H. 793 Chadron formation of White River group on divide between French River and Cheyenne River 7 miles southeast of Fairburn, view eastward; underlying dark Pierre shale is exposed in ravines. Custer County, South Dakota.1901. Plate 23 in U.S. Geological Survey. Folio 219. 1925. #1:/South Dakota-Folio 219/dnh00795 ID. Darton, N.H. 795 Pahasapa limestone capping mesa and Deadwood formation on steep slopes of canyon of Box Elder Creek opposite mouth of Jim Creek, view northward. Upper dark ledge is massive purplish sandstone near top of Deadwood formation. Butte County, South Dakota.1901. Plate 19 in U.S. Geological Survey. Folio 219. 1925. #1:/South Dakota-Folio 219/dnh01225 ID. Darton, N.H. 1225 Contact of nearly horizontal Deadwood formation with underlying jointed Algonkian schist in Cold Brook canyon 4 miles southwest of Wind Cave, the man stands at the contact, view northward. Custer County, South Dakota.1898. Plate 15 in U.S. Geological Survey. Folio 219. 1925 #1:/South Dakota-Folio 219/dnh01231 ID. Darton, N.H. 1231 Drop fault in Lakota sandstone in north wall of canyon of Dry Creek 5 miles northwest of Fairburn. Custer County, South Dakota.1901. Plate 30 in U.S. Geological Survey. Folio 219. 1925. #1:/Wyoming-Folio 52/jta00067 ID. Jaggar, T.A. 67 Sunlight Glacier, this glacier occupies the amphitheater of Sulphur Creek, a lateral moraine and a deep crevasse across the glacier is shown in the view. Yellowstone National Park. Wyoming. August 1893. Figure 5 in U.S.Geological Survey. Folio 52. 1898. #1:/Wyoming-Folio 52/jta00079 ID. Jaggar, T.A. 79 A complex of dikes, this view represents several varieties of dikes cutting basic breccia, at head of Sunlight Creek, Absaroka Range. Yellowstone National Park. Wyoming. August 9, 1893. Figure 5 in U.S.Geological Survey. Folio 52. 1898. #1:/Wyoming-Folio 52/jta00080 ID. Jaggar, T.A. 80 Clark Fork and Index Peak, this view represents the valley of the Clark Fork above the canyon. The foreground shows a rough, glaciated surface of Archean granites and schists. On the further side of the valley cliffs of Paleozoic limestone ate well brought out, and overlying them are the breccias and basalt flows that form the Absaroka Range. Yellowstone National Park. Wyoming. August 12, 1893. Figure 5 in U.S.Geological Survey. Folio 52. 1898. #1:/Wyoming-Folio 52/jta00095 ID. Jaggar, T.A. 95 Canyon of Clark Fork, a deep, narrow gorge with abrupt walls, cut in Archean rocks, which drains the greater part of the northern end of the Absaroka Range. Yellowstone National Park. Wyoming. August 20, 1893. Figure 4 in U.S.Geological Survey. Folio 52. 1898. #1:/Wyoming-Folio 52/jta00116 ID. Jaggar, T.A. 116 Basic breccia a typical mass of medium breccia near the source of Shoshone River, it is without any flow structure, and shows characteristic forms of erosion. On the left a narrow vertical dike may be seen, which near the top lies inclined at low angle. Yellowstone National Park. Wyoming. August 20, 1893. Figure 6 in U.S.Geological Survey. Folio 52. 1898. #1:/Illinois-Folio 220/leew0010 ID. Lee, Wallace 10 Sandstone beds in McLeansboro formation resting unconformably on Shoal Creek limestone member of the formation: NW ¼ sec. 25, T. 9 N. R. 5 W. Montgomery County, Illinois. 1914. Figure 4 in U.S.Geological Survey. Folio 220. 1926. #1:/Illinois-Folio 220/leew0022 ID. Lee, Wallace 22 Illinoian till (lower lighter beds) overlain by carbonaceous swamp clay (dark band) with lighter-colored clay at top, in excavation at Gillespie Farmers' cooperative store. Macoupin County, Illinois. 1914. Figure 9 in U.S.Geological Survey. Folio 220. 1926 #1:/Illinois-Folio 220/leew0030 ID. Lee, Wallace 30 Hard, jointed Kansan(?) till overlain by Yarmouth(?) soil and subsoil in ravine 1 mile north of Staunton, the ferruginous subsoil material extends down into joint cracks in the underlying till. Macoupin County, Illinois. 1914. Figure 7 in U.S.Geological Survey. Folio 220. 1926. #1:/Illinois-Folio 220/leew0031 ID. Lee, Wallace 31 Tree stump rooted as it grew in Yarmouth(?) interglacial soil, overlain in near-by exposure by Yarmouth(?) sand and clay and Illinoian till. Macoupin County, Illinois. 1914. Figure 6 in U.S.Geological Survey. Folio 220. 1926. #1:/South Dakota-Folio 219/pai01149 ID. Paige, S. 1149 Quartzite-slate banding in Algonkian quartzite in outcrop on Elk Creek, 1.5 miles west of former Elk Creek post office. Meade County, South Dakota. 1908. Plate 6 in U.S.Geological Survey. Folio 219. 1925. #1:/South Dakota-Folio 219/pai01162 ID. Paige, S. 1162 Banding of quartzite and slate in oxidized wall-like outcrop of quartz-pyrite replacement vein that extends southward from Hay Creek. Lawrence County, South Dakota. 1908. Plate 5 in U.S.Geological Survey. Folio 219. 1925. #1:/South Dakota-Folio 219/pai01176 ID. Paige, S. 1176 Algonkian siliceous schist and arkosic grit weathered into pinnacles west of Nemo. Lawrence County, South Dakota. 1908. Plate 5 in U.S.Geological Survey. Folio 219. 1925. #1:/South Dakota-Folio 219/pai01178 ID. Paige, S. 1178 Typical brecciation in oxidized outcrop of prominent quartz-pyrite replacement vein: that extends southward from Hay Creek. Lawrence County, South Dakota. 1908. Plate 4 in U.S.Geological Survey. Folio 219. 1925. #1:/South Dakota-Folio 219/pai01192 ID. Paige, S. 1192 Very coarse conglomerate in Algonkian rocks on north side of Estes Creek, Meade County, South Dakota. 1908. Plate 8 in U.S.Geological Survey. Folio 219. 1925. #1:/South Dakota-Folio 219/pai01195 ID. Paige, S. 1195 Intricate injection of granite into Alkongian schist at southern border of Harney peak intrusive mass. Custer County, South Dakota. 1908. Plate 9 in U.S.Geological Survey. Folio 219. 1925. #1:/South Dakota-Folio 219/pai01210 ID. Paige, S. 1210 Remnant of mass of Algonkian schist, recognizable by banding, nearly assimilated by invading granite in contact zone north of Custer. Custer County, South Dakota. 1908. Plate 10 in U.S.Geological Survey. Folio 219. 1925. #1:/South Dakota-Folio 219/pai01215 ID. Paige, S. 1215 Granite invading Alkongian schist in numerous parallel sills in border zone of granite intrusion northeast of Custer. Custer County, South Dakota. 1908. Plate 11 in U.S.Geological Survey. Folio 219. 1925. #1:/South Dakota-Folio 219/pai01220 ID. Paige, S. 1220 Large crystals of spodumene in granite dike at Etta mine, near Keystone. Pennington County, South Dakota. 1908. Plate 7 in U.S.Geological Survey. Folio 219. 1925. #1:/Arkansas-Folio 202/agi00078 ID. Adams, G.I. 78 Ledge of St. Joe limestone, member of Boone limestone in Markle Hollow. Marion County, Arkansas. 1902. Plate 7-A in U.S. Geological Survey. Professional paper 24. 1904. Plate 7 in U.S. Geological Survey. Folio 202. 1916. #1:/Alabama-Folio 226/butc0724 ID. Butts, C. 724 Typical coal mine in the Cahaba coalfield, Coleanor mine about 2 miles west of the Montevallo quadrangle, looking west. Bibb County, Alabama. 1924. Plate 13 in U.S. Geological Survey. Folio 226. 1940. #1:/Alabama-Folio 226/butc0726 ID. Butts, C. 726 Conasauga limestone overthrust on a coal bed in the Pottsville formation, Shaol Creek, 1.5 miles southwest of Aldrich, in the Cahaba coal field. Shelby County, Alabama. 1924. Plate 12 in U.S. Geological Survey. Folio 226. 1940. #1:/Alabama-Folio 226/butc0732 ID. Butts, C. 732 Cavernous silica from Bibb dolomite: characteristic-weathering product from the Brierfield and Bibb dolomite. Alabama. 1924. Plate 7 in U.S. Geological Survey. Folio 226. 1940. #1:/Alabama-Folio 226/butc0738 ID. Butts, C. 738 Prospect for roofing slate in Waxahatchee slate: three fourths of a mile south of Ocampo, looking north. Chilton County, Alabama. 1924. Plate 4 in U.S. Geological Survey. Folio 226. 1940. #1:/Alabama-Folio 226/butc0741 ID. Butts, C. 741 Carbonaceous and Ordovician rocks cut on Southern railway half a mile east of Calera. The Athens shale (Ordovician) is overlain by the Frog Mountain sandstone (Devonian), 4 inches thick; clay that may be of Devonian age in the middle; and Fort Payne chert (Mississippian) at the right. There is a great stratigraphic break between the Frog Mountain sandstone and Athens shale. Looking northeast. Shelby County, Alabama. 1924. Plate 10 in U.S. Geological Survey. Folio 226. 1940. #1:/Alabama-Folio 226/butc0742 ID. Butts, C. 742 Looking northwest across Shelby Valley, eroded mainly on Newala limestone Columbiana Mountain in the distance. Shelby County, Alabama. 1924. Plate 2 in U.S. Geological Survey. Folio 226. 1940. #1:/Alabama-Folio 226/butc0748 ID. Butts, C. 748 Crumpled Wash creek slate 5 miles south of Shelby. Shelby County, Alabama. 1924. Plate 5 in U.S. Geological Survey. Folio 226. 1940. #1:/Alabama-Folio 226/butc0750 ID. Butts, C. 750 Goosa River in the southeast corner of Columbiana quadrangle, looking south from the Narrows, shows upland surface of old peneplain with entrenched river valley. Shelby County, Alabama. 1924. Plate 1 in U.S. Geological Survey. Folio 226. 1940. #1:/Alabama-Folio 226/butc0756 ID. Butts, C. 756 Frog Mountain sandstone (Devonian) lying on fossiliferous clay which is decomposed Little Oak limestone (Ordovician). Cut in railroad northwest of Mosteller, in the eastern part of Columbiana quadrangle, between the clay and sandstone is a stratigraphic gap representing the upper part of the Ordovician system, the entire Silurian system and the lower part of the Devonian system. Shelby County, Alabama. 1924. Plate 9 in U.S. Geological Survey. Folio 226. 1940. #1:/Alabama-Folio 226/butc0760 ID. Butts, C. 760 Iron ore diggings at Shelby. Ore is in pockets in decayed rock, which is reported to extend nearly 100 feet below the bottom of the pit. The clay seems to be fill and ancient sink hole. Shelby County, Alabama. 1924. Plate 15 in U.S. Geological Survey. Folio 226. 1940. #1:/Alabama-Folio 226/butc0762 ID. Butts, C. 762 Shelby iron ore diggings at top there is 15 feet of red loam carry best quality of lump ore, underlain by light colored sand and quartz gravel possibly Cretaceous age. Shelby County, Alabama. 1924. Plate 11 in U.S. Geological Survey. Folio 226. 1940. #1:/Alabama-Folio 226/butc0767 ID. Butts, C. 767 Rounded hills characteristic of areas underlain by Waxahatchee slate, about 2 miles south of Shelby, looking east. Shelby County, Alabama. 1924. Plate 3 in U.S. Geological Survey. Folio 226. 1940. #1:/Alabama-Folio 226/butc0799 ID. Butts, C. 799 Brierfield dolomite incrusted with characteristic fretwork of residual silica. Sixmile Creek about 1 mile northwest of the southwest corner of the Montevallo quadrangle. Bibb County, Alabama. 1924. Plate 6 in U.S. Geological Survey. Folio 226. 1940. #1:/Alabama-Folio 226/butc0836 ID. Butts, C. 836 Newala limestone in Bowden's quarry, about a half a mile south of Newala: in the northeastern part of the Montevallo quadrangle, looking east. Shelby County, Alabama. 1924. Plate 8 in U.S. Geological Survey. Folio 226. 1940 #1:/Alabama-Folio 226/butc0837 ID. Butts, C. 837 Residual pinnacle of contorted Newala limestone exposed in ore bank at Shelby. Shelby County, Alabama. 1924. Plate 14 in U.S. Geological Survey. Folio 226. 1940 #1:/North Carolina-Folio 222/kei00470 ID. Keith, A. 470 Kings Mountain from plateau 2 miles to the northwest. Gaston County, North Carolina. 1929. Plate 10 in U.S. Geological Survey. Folio 222. 1931. #1:/South Carolina-Folio 222/kei00471 ID. Keith, A. 471 Yorkville granite weathering into mushroom, spheroidal and cave forms 2 miles N. 20 degrees W. of York. York County, South Carolina. 1929. Plate 10 in U.S. Geological Survey. Folio 222. 1931. #1:/Arkansas-Folio 202/mhd00196 ID. Miser, H.D. 196 Cotter dolomite in cut of Missouri & North Arkansas railroad at the Narrows, just east of Beaver. Carroll County, Arkansas. 1915. Plate 4 in U.S. Geological Survey. Folio 202. 1916. #1:/Arkansas-Folio 202/mhd00197 ID. Miser, H.D. 197 Unconformity within Boone limestone in bluff one-half mile west of War Eagle Post Office, unconformity possibly represents submarine erosion of earlier deposits of the Boone overlapped by later deposits of the Boone. A few feet of thin-bedded limestone of the St. Joe member at base is overlain by about 90 feet of limestone and chert which contains a Fern Glen fauna; cherty limestone above the unconformity. Photo by E.O, Ulrich. Benton County, Arkansas. 1915. Plate 8 in U.S. Geological Survey. Folio 202. 1916. #1:/North Carolina-Folio 222/sdb00062 ID. Sterrett, D.B. 62 Characteristic outcrop of tin bearing pegmatite: about two-thirds of a mile south of Kings Mountain. Gaston County, North Carolina. 1929. Plate 1 in U.S. Geological Survey. Folio 222. 1931. #1:/South Carolina-Folio 222/sdb00074 ID. Sterrett, D.B. 74 Washing gravel for monazite, 4 miles northwest of Gaffney. Cherokee County, South Carolina. 1929. Plate 8 in U.S. Geological Survey. Folio 222. 1931. #1:/North Carolina-Folio 222/sdb00137 ID. Sterrett, D.B. 137 Pinnacle of Kings Mountain, from 1 mile distant, looking southwest along the strike: surface of Piedmont Plateau in foreground. Gaston County, North Carolina. 1929. Plate 2 in U.S. Geological Survey. Folio 222. 1931. #1:/North Carolina-Folio 222/sdb00139 ID. Sterrett, D.B. 139 Crowders Mountain looking N 63 degrees E. from the Pinnacle. Piedmont Plateau to the right and in the background. Gaston County, North Carolina. 1929. Plate 5 in U.S. Geological Survey. Folio 222. 1931. #1:/North Carolina-Folio 222/sdb00143 ID. Sterrett, D.B. 143 Piedmont Plateau, looking northwest from the Pinnacle: Quartzite ledges in foreground. Gaston County, North Carolina. 1929. Plate 3 in U.S. Geological Survey. Folio 222. 1931. #1:/North Carolina-Folio 222/sdb00144 ID. Sterrett, D.B. 144 Piedmont Plateau viewed from water tower 1 mile north of Kings Mountain. Gaston County, North Carolina. 1929. Plate 4 in U.S. Geological Survey. Folio 222. 1931. #1:/North Carolina-Folio 222/sdb00150 ID. Sterrett, D.B. 150 Coarse Kyanite quartzite on southeast side of Crowders Mountain. Gaston County, North Carolina. 1929. Plate 7 in U.S. Geological Survey. Folio 222. 1931 #1:/North Carolina-Folio 222/sdb00247 ID. Sterrett, D.B. 247 Piedmont Plateau with Kings Mountain range in the distance, viewed from water tower 1 mile north of Kings Mountain Gaston County, North Carolina. 1929. Plate 6in U.S. Geological Survey. Folio 222. 1931. #1:/South Carolina-Folio 222/sdb00253 ID. Sterrett, D.B. 253 Pedestal rock of Yorkville granite, due to weathering; two-thirds of a mile northwest of Filbert, about 12 feet high. York County, South Carolina. 1929. Plate 9 in U.S. Geological Survey. Folio 222. 1931. #1:/Pennsylvania-Folio 225/sgw00103 ID. Stose, G.W. 103 Typical talus of Antietam sandstone at top of front knobs of South Mountain, overlooking Cumberland valley at Stony Knob, just west of Fairfield quadrangle. Franklin County, Pennsylvania. 1927. Plate 6 in U.S. Geological Survey. Folio 225. 1929. #1:/Pennsylvania-Folio 225/sgw00343 ID. Stose, G.W. 343 Typical rock ledges of schistose Weverton sandstone on top of South Mountain at Hammond Rocks, north of Gettysburg quadrangle. Cumberland County, Pennsylvania. 1927. Plate 3 in U.S. Geological Survey. Folio 225. 1929. #1:/Pennsylvania-Folio 225/sgw00377 ID. Stose, G.W. 377 Vesicular diabase, the thin porous layer is at the upper contact of a 30 foot diabase sill in Triassic shale, just east of Heidlersburg. Adams County, Pennsylvania. 1927. Plate 10 in U.S. Geological Survey. Folio 225. 1929. #1:/Pennsylvania-Folio 225/sgw00378 ID. Stose, G.W. 378 Residual boulders from a diabase dike near Bowlder, these boulders are similar to the ironstones that were made into fences and used as barricades by both armies in the battle of Gettysburg. Adams County, Pennsylvania. 1927. Plate 8 in U.S. Geological Survey. Folio 225. 1929. #1:/Pennsylvania-Folio 225/sgw00379 ID. Stose, G.W. 379 Spherical exfoliation of weathered diabase, 1 mile south of Baker School, the ball like mass rests on sand and soil derived from the complete disintegration of diabase. Adams County, Pennsylvania. 1927. Plate 9 in U.S. Geological Survey. Folio 225. 1929. #1:/Pennsylvania-Folio 225/sgw00380 ID. Stose, G.W. 380 Lava flow near Bendersville, fragments of vesicular lava inclosed in red sandy matrix overlying red sandstone. Adams County, Pennsylvania. 1927. Plate 11 in U.S. Geological Survey. Folio 225. 1929. #1:/Pennsylvania-Folio 225/sgw00382 ID. Stose, G.W. 382 Old Quaker Meetinghouse near Bermudian Church, built in eighteenth century of Triassic red sandstone. Adams County, Pennsylvania. 1927. Plate 20 in U.S. Geological Survey. Folio 225. 1929. #1:/Pennsylvania-Folio 225/sgw00387 ID. Stose, G.W. 387 Porous sandstone residual from sandy Conestoga limestone at Mcsherrystown; crumbles to round sand grains and is quarried for building sand. Adams County, Pennsylvania. 1927. Plate 5 in U.S. Geological Survey. Folio 225. 1929. #1:/Pennsylvania-Folio 225/sgw00407 ID. Stose, G.W. 407 Down Marsh Creek valley from the divide at Newman school, the valley lies along a shear zone in greenstone. Adams County, Pennsylvania. 1927. Plate 5 in U.S. Geological Survey. Folio 225. 1929. #1:/Pennsylvania-Folio 225/sgw00410 ID. Stose, G.W. 410 Schistose aporphyolite exposed in small quarry west of Bridgeport; schistosity dips south east. Adams County, Pennsylvania. 1927. Plate 1 in U.S. Geological Survey. Folio 225. 1929. #1:/Pennsylvania-Folio 225/sgw00422 ID. Stose, G.W. 422 Folded thin-bedded Weverton quartzite at east portal of Western Maryland railway tunnel in Tunnel Hill. Adams County, Pennsylvania. 1927. Plate 15 in U.S. Geological Survey. Folio 225. 1929. #1:/Pennsylvania-Folio 225/sgw00423 ID. Stose, G.W. 423 Massive beds of Weverton sandstone on bare rock: north of Charmian. Franklin County, Pennsylvania. 1927. Plate 2 in U.S. Geological Survey. Folio 225. 1929. #1:/Pennsylvania-Folio 225/sgw00426 ID. Stose, G.W. 426 Fault contact between Weverton sandstone and Pre-Cambrian aporphyolite in old Tapeworm railroad cut 1 mile west of Iron Springs, the sandstone has been thrust over the aporphyolite, and the fault plane dips 40 degrees SE. Adams County, Pennsylvania. 1927. Plate 16 in U.S. Geological Survey. Folio 225. 1929. #1:/Pennsylvania-Folio 225/sgw00433 ID. Stose, G.W. 433 Devils Racecourse in South Mountain, west of Gladhill. Composed of Cambrian quartzite boulders stripped of soil on an old peneplain surface now forming a valley floor. Franklin County, Pennsylvania. 1927. Plate 24 in U.S. Geological Survey. Folio 225. 1929. #1:/Pennsylvania-Folio 225/sgw00436 ID. Stose, G.W. 436 Stream culvert built of Weverton sandstone on abandoned Tapeworm railroad on flank of Jacks Mountain; overgrown with large white pines. Adams County, Pennsylvania. 1927. Plate 18 in U.S. Geological Survey. Folio 225. 1929. #1:/Pennsylvania-Folio 225/sgw00445 ID. Stose, G.W. 445 East face of Big Hill north of Arendtsville, the hill, composed of resistant Pre-Cambrian aporphyolite, rises abruptly above the Gettysburg plain in the foreground. Adams County, Pennsylvania. 1927. Plate 13 in U.S. Geological Survey. Folio 225. 1929. #1:/Pennsylvania-Folio 225/sgw00447 ID. Stose, G.W. 447 Slate base of Loudoun formation in old quarry on east slope of Piney Mountain; west of Wenksville. Adams County, Pennsylvania. 1927. Plate 4 in U.S. Geological Survey. Folio 225. 1929. #1:/Pennsylvania-Folio 225/sgw00448 ID. Stose, G.W. 448 The Narrows, a sharp rocky gap cut by Conewago Creek through the Big Hillbear Mountain aporphyolite ridge; the even crest of the mountains represents an old peneplain surface. Adams County, Pennsylvania. 1927. Plate 14 in U.S. Geological Survey. Folio 225. 1929. #1:/Pennsylvania-Folio 225/sgw01220 ID. Stose, G.W. 1220 Round Top, a conical knob of diabase, Gettysburg Battlefield in foreground. Gettysburg National Military Park, Pennsylvania. 1927. Plate 12 in U.S. Geological Survey. Folio 225. 1929. #1:/Pennsylvania-Folio 225/sgw01221 ID. Stose, G.W. 1221 Tunnel Hill and valley of Miney Branch viewed from Bare Rock north of Charmian. The mountain is capped by Cambrian quartzite overlying greenstone, which is quarried at the foot of the mountain. Franklin County, Pennsylvania. 1927. Plate 17 in U.S. Geological Survey. Folio 225. 1929. #1:/Pennsylvania-Folio 225/sgw01338 ID. Stose, G.W. 1338 Limestone conglomerate interbedded with thin-bedded dark limestone near base of Conestoga limestone, in small quarry 2 miles west of Downingtown; the conglomerate of angular fragments of white marble in a limestone matrix. Chester County, Pennsylvania. 1923. Plate 8 in U.S. Geological Survey. Folio 223. 1932. #1:/Pennsylvania-Folio 225/sgw01478 ID. Stose, G.W. 1478 Thick even bedded Chickies quartzite in lower part of the formation, Pennsylvania Railroad cut 1 mile west of Atglen. Chester County, Pennsylvania. 1923. Plate 5 in U.S. Geological Survey. Folio 223. 1932. #1:/Pennsylvania-Folio 225/sgw01480 ID. Stose, G.W. 1480 Thin-bedded Chickies quartzite above the thick beds, Pennsylvania railroad cut 1 mile west of Atglen. Chester County, Pennsylvania. 1923. Plate 6 in U.S. Geological Survey. Folio 223. 1932. #1:/Pennsylvania-Folio 225/sgw01488 ID. Stose, G.W. 1488 Schistose Chickies quartzite, schistose plane dipping southeast, exposed in small gorge in North Valley Hills, 2 miles west of Coatesville. Chester County, Pennsylvania. 1923. Plate 1 in U.S. Geological Survey. Folio 223. 1932. #1:/Pennsylvania-Folio 225/sgw01494 ID. Stose, G.W. 1494 Baltimore gneiss injected by pegmatite and gabbro in thin layers, road cut on east side of West Branch of Brandywine Creek half a mile north of Coatesville, Coatsville quadrangle. Chester County, Pennsylvania. 1923. Plate 4 in U.S. Geological Survey. Folio 223. 1932. #1:/Pennsylvania-Folio 225/sgw01569 ID. Stose, G.W. 1569 Large spherulites in aporhyolite, from a point near mouth of Copper Run. Adams County, Pennsylvania. 1927. Plate 30 in U.S. Geological Survey. Folio 225. 1929. #1:/Pennsylvania-Folio 225/sgw01571 ID. Stose, G.W. 1571 Bands of coarse spherulites in dark devitrified Aporhyolite glass, from Raccoon Creek. Franklin County, Pennsylvania. 1927. Plate 26 in U.S. Geological Survey. Folio 225. 1929. #1:/Pennsylvania-Folio 225/sgw01572 ID. Stose, G.W. 1572 Aporhyolite banded by chain spherulites, from Corls ridge north of South Mountain Sanatorium; spherulitic fabric replaced by granular fabric. Franklin County, Pennsylvania. 1927. Plate 27 in U.S. Geological Survey. Folio 225. 1929. #1:/Pennsylvania-Folio 225/sgw01573 ID. Stose, G.W. 1573 Aporhyolite banded by chain spherulites, from Raccoon Creek northwest of South Mountain Sanatorium. Bright red rock with darker red streaks bordering white spherulitic fabric replaced by granular fabric. Franklin County, Pennsylvania. 1927. Plate 25 in U.S. Geological Survey. Folio 225. 1929. #1:/Pennsylvania-Folio 225/sgw01574 ID. Stose, G.W. 1574 Dense felsitic aporhyolite, from foot of Rocky Mountain, 2 miles south of Caledonia furnace; shows dark purple and gray flow banding. Franklin County, Pennsylvania. 1927. Plate 34 in U.S. Geological Survey. Folio 225. 1929. #1:/Pennsylvania-Folio 225/sgw01575 ID. Stose, G.W. 1575 Finely laminated gray aporhyolite from south slope of Big Hill, 1 mile northwest of Cashtown, the fine even flow banding bands around the white to pink feldspar phenocrysts. Polished specimen. Adams County, Pennsylvania. 1927. Plate 29 in U.S. Geological Survey. Folio 225. 1929. #1:/Pennsylvania-Folio 225/sgw01576 ID. Stose, G.W. 1576 Dark gray porphyry spotted with rectangular white feldspar phenocrysts from head of Marsh Creek hollow. Polished specimen. Adams County, Pennsylvania. 1927. Plate 32 in U.S. Geological Survey. Folio 225. 1929. #1:/Pennsylvania-Folio 225/sgw01577 ID. Stose, G.W. 1577 Flow banding in aporhyolite from Raccoon Creek; exhibits drag folds in devitrified layer. Franklin County, Pennsylvania. 1927. Plate 28 in U.S. Geological Survey. Folio 225. 1929. #1:/Pennsylvania-Folio 225/sgw01579 ID. Stose, G.W. 1579 Mottled green and pink amygdaloidal aporhyolite from Bingham copper mine north of Pine Mountain; a handsome ornamental rock with large amygdules of pink quartz the centers which are stained green by copper carbonate. Polished specimen. Adams County, Pennsylvania. 1927. Plate 33 in U.S. Geological Survey. Folio 225. 1929. #1:/Pennsylvania-Folio 225/sgw01580 ID. Stose, G.W. 1580 Rhyolite flow breccia, from a point 2 miles southeast of South Mountain Sanatorium; angular fragments of red rhyolite cemented into a breccia by quartz. Polished specimen. Franklin County, Pennsylvania. 1927. Plate 31 in U.S. Geological Survey. Folio 225. 1929. #1:/Pennsylvania-Folio 225/sgw01581 ID. Stose, G.W. 1581 Rhyolite breccia, from a locality 1 mile north Brady school Buchanan valley; rhyolite tuff fragments inclosed in finer red tuff matrix. Adams County, Pennsylvania. 1927. Plate 35 in U.S. Geological Survey. Folio 225. 1929. #1:/Pennsylvania-Folio 225/sgw01582 ID. Stose, G.W. 1582 Amygdaloidal metabasalt, from a point near South Mountain Sanatorium; vesicles filled with dark green epidote with a lining of milk white quartz. Polished specimen. Franklin County, Pennsylvania. 1927. Plate 36 in U.S. Geological Survey. Folio 225. 1929. #1:/Pennsylvania-Folio 225/sgw01583 ID. Stose, G.W. 1583 Weathered amygdaloidal metabasalt from foot of Wildcat Rocks, the round quartz amygdules stand in relief on the weathered surface. Franklin County, Pennsylvania. 1927. Plate 38 in U.S. Geological Survey. Folio 225. 1929. #1:/Pennsylvania-Folio 225/sgw01584 ID. Stose, G.W. 1584 Weathered amygdaloidal greenstone from Pigeon Hills 1.5 miles northeast of Bittinger: the brown weathered rock is pitted with round holes from which the filing, probably calcite has been dissolved. Adams County, Pennsylvania. 1927. Plate 37 in U.S. Geological Survey. Folio 225. 1929. #1:/Pennsylvania-Folio 225/sgw01585 ID. Stose, G.W. 1585 Spotted volcanic slate, from a point just south of Charmian; fragments of basaltic tuff flattened to shinny flakes. Franklin County, Pennsylvania. 1927. Plate 39 in U.S. Geological Survey. Folio 225. 1929. #1:/Pennsylvania-Folio 225/sgw01586 ID. Stose, G.W. 1586 Epidotic concretions in altered Triassic shale metamorphosed by diabase intrusion 5 miles south of Gettysburg. Gettysburg National Military Park, Pennsylvania. 1927. Plate 23 in U.S. Geological Survey. Folio 225. 1929. #1:/Pennsylvania-Folio 225/sgw01591 ID. Stose, G.W. 1591 Molds of lozenge shaped crystals of glauberite in hard baked Triassic shale, from a point near Goldenville; the mud in which these crystals grew was deposited in ponded water under arid climatic conditions. Adams County, Pennsylvania. 1927. Plate 21 in U.S. Geological Survey. Folio 225. 1929. #1:/Pennsylvania-Folio 227/butc0636 ID. Butts, C. 636 Thick bedded but laminated limestone in upper part of Keyser member of Helderberg limestone; cut a south end of Bald Hill 1 miles east of Holidaysburg, looking northeast, Shriver limestone at far end of cut. Blair County, Pennsylvania. 1924. Plate 17 in U.S. Geological Survey. Folio 227. 1945. #1:/Pennsylvania-Folio 227/butc0640 ID. Butts, C. 640 Shriver limestone; railroad cut south end of Bald Hill 1 mile east of Holidaysburg, looking northeast. Blair County, Pennsylvania. 1924. Plate 16 in U.S. Geological Survey. Folio 227. 1945. #1:/Pennsylvania-Folio 227/butc0646 ID. Butts, C. 646 Morrison Cove, view east across the limestone valley to Tussey Mountain from the crest of Dunning, west of Royer, and 6 miles east of Holidaysburg. The low wood in middle distance is on the outcrop of the Gatesburg formation. The gentle slope occupied by cultivated land is on the Nittany and Bellefonte dolomites and the valley at the foot of the ridge is on the outcrop of the Carlim, Lowville and Trenton limestone all of which dip west toward the observer. Blair County, Pennsylvania. 1924. Plate 3 in U.S. Geological Survey. Folio 227. 1945. #1:/Pennsylvania-Folio 227/butc0651 ID. Butts, C. 651 Tuscarora quartzite north end of Lock Mountain at Point View, looking south. Blair County, Pennsylvania. 1924. Plate 15 in U.S. Geological Survey. Folio 227. 1945. #1:/Pennsylvania-Folio 227/butc0652 ID. Butts, C. 652 Point view Knob in the northwest corner of the Huntingdon quadrangle; view northeast across the valley of Frankstown Branch of Juniata River. Crest of Canoe mountain in left distance. The white areas are talus of quartzite slide rocks from the Tuscarosa quartzite which crops out on the crest of the knob. The horizontal lines are the sites of old tram tracks use in collecting ganister. Huntingdon County, Pennsylvania. 1924. Plate 2 in U.S. Geological Survey. Folio 227. 1945. #1:/Pennsylvania-Folio 227/butc0660 ID. Butts, C. 660 Lowville limestone in quarry of St. Clair Limestone Co. at Ganister, looking northeast; layer of limestone near bottom crowded with fucoids (fossil seaweed). Blair County, Pennsylvania. 1924. Plate 11 in U.S. Geological Survey. Folio 227. 1945. #1:/Pennsylvania-Folio 227/butc0663 ID. Butts, C. 663 Fucoids in beds at or near bottom of Lowville limestone, top of a layer 5 feet thick crowded throughout with these forms. Stems one-eighth inch in diameter. On weathering the dark material dissolves out, leaving a honeycombed rock; quarry at Ganister. Blair County, Pennsylvania. 1924. Plate 13 in U.S. Geological Survey. Folio 227. 1945. #1:/Pennsylvania-Folio 227/butc0691 ID. Butts, C. 691 West across Logan Valley, from a point near the crest of Dunning Mountain, 1 mile south of Claysburg in the southwestern part of the Holidaysburg quadrangle. Outlying part of Allegheny Front in the distance, the highest point of which is 3,136 feet above sea level, and more than 1,900 feet above the bottom of the valley. Blair County, Pennsylvania. 1924. Plate 1 in U.S. Geological Survey. Folio 227. 1945. #1:/Pennsylvania-Folio 227/butc691a ID. Butts, C. 691a West across Logan Valley, from a point near the crest of Dunning Mountain, 1 mile south of Claysburg in the southwestern part of the Holidaysburg quadrangle. Outlying part of Allegheny Front in the distance, the highest point of which is 3,136 feet above sea level, and more than 1,900 feet above the bottom of the valley. Blair County, Pennsylvania. 1924. Plate 1 in U.S. Geological Survey. Folio 227. 1945. #1:/Pennsylvania-Folio 227/butc0908 ID. Butts, C. 908 Clay pit 1 mile south of Oreminia (mines) residual clay accumulated on the outcrop of the Mines dolomite, looking north. Blair County, Pennsylvania. 1924. Plate 27 in U.S. Geological Survey. Folio 227. 1945. #1:/Pennsylvania-Folio 227/butc0910 ID. Butts, C. 910 Quarry just south of Ganister, looking northwest; Trenton limestone on slope above. Lock Mountain in distance. Rodman limestone at top margin of quarry. Blair County, Pennsylvania. 1924. Plate 26 in U.S. Geological Survey. Folio 227. 1945. #1:/Pennsylvania-Folio 227/butc910a ID. Butts, C. 910a Quarry just south of Ganister, looking northwest; Trenton limestone on slope above. Lock Mountain in distance. Rodman limestone at top margin of quarry. Blair County, Pennsylvania. 1924. Plate 26 in U.S. Geological Survey. Folio 227. 1945. #1:/Pennsylvania-Folio 227/butc0913 ID. Butts, C. 913 In quarry at Ganister showing beds just below Lowville limestone: Lowville (at extreme left) than Lemont argillaceous limestone member of Carlin limestone, followed by lower part of Carlin limestone. Between the Lemont member and the Lowville is a great stratigraphic hiatus due to the absence of formations that in east Tennessee are several feet thick. Blair County, Pennsylvania. 1924. Plate 12 in U.S. Geological Survey. Folio 227. 1945. #1:/Pennsylvania-Folio 227/butc0918 ID. Butts, C. 918 Clover Creek quarry at Sparr, mainly in Carlim limestone; Beekmantown dolomite at bottom. Looking southwest. Blair County, Pennsylvania. 1924. Plate 25 in U.S. Geological Survey. Folio 227. 1945. #1:/Pennsylvania-Folio 227/butc918a ID. Butts, C. 918a Clover Creek quarry at Sparr, mainly in Carlim limestone; Beekmantown dolomite at bottom. Looking southwest. Blair County, Pennsylvania. 1924. Plate 25 in U.S. Geological Survey. Folio 227. 1945. #1:/Pennsylvania-Folio 227/butc0925 ID. Butts, C. 925 View of plowed field covered with small stones from the underlying Shriver limestone, north of Cove, in southwest corner of Huntingdon quadrangle, looking east; characteristic feature of the Shriver throughout the region. Huntingdon County, Pennsylvania. 1924. Plate 18 in U.S. Geological Survey. Folio 227. 1945. #1:/Pennsylvania-Folio 227/butc0933 ID. Butts, C. 933 Chemug formation, showing alternating thin shale and sandstone layers; along road a short distance north of Hawn Bridge, in the northwestern part of the Huntingdon quadrangle, looking northeast. Huntingdon County, Pennsylvania. 1924. Plate 21 in U.S. Geological Survey. Folio 227. 1945. #1:/Pennsylvania-Folio 227/butc0943 ID. Butts, C. 943 Characteristic hackly fossiliferous shale in the top of the Hamilton formation south of Huntingdon looking northeast. Huntingdon County, Pennsylvania. 1924. Plate 19 in U.S. Geological Survey. Folio 227. 194 #1:/Pennsylvania-Folio 227/butc0945 ID. Butts, C. 945 Southeast down Juniata River valley across Huntingdon, high point in distance on right formed by the convergence of Terrace Mountain and Sideling Hill on the axis of the Trough Creek syncline; Crest of Jacks Mountain on left. Huntingdon County, Pennsylvania. 1924. Plate 5 in U.S. Geological Survey. Folio 227. 1945. #1:/Pennsylvania-Folio 227/butc0951 ID. Butts, C. 951 Dolomite along Pennsylvania railroad about 1 mile east of Union Furnace, looking north; this is a part of the Beekmantown group and is believed to be Nittany dolomite. Huntingdon County, Pennsylvania. 1924. Plate 10 in U.S. Geological Survey. Folio 227. 1945. #1:/Pennsylvania-Folio 227/butc1162 ID. Butts, C. 1162 Layers of Warrior limestone composed of cryptozoon undulatum Bassler, five layers of cryptozoons in about 3 feet of thickness; quarry at Bakers Summit in the southwestern part of the Holidaysburg quadrangle, looking southeast. Bedford County, Pennsylvania. 1924. Plate 7 in U.S. Geological Survey. Folio 227. 1945. #1:/Pennsylvania-Folio 227/butc1163 ID. Butts, C. 1163 Brallier shale, these thick beds are thinly laminated and break down into thin chips on weathering. Cut on Pennsylvania railroad about half a mile east of Huntingdon, looking north. Huntingdon County, Pennsylvania. 1924. Plate 20 in U.S. Geological Survey. Folio 227. 1945. #1:/Utah-Arches National Park/crb00582 ID. Colton, R.B. 582ct Arches National Park, Utah. The Organ,1972. #1:/Utah-Arches National Park/crb00584 ID. Colton, R.B. 584ct Arches National Park, Utah. Three Gossips, 1972. #1:/Utah-Arches National Park/crb00585 ID. Colton, R.B. 585ct Arches National Park, Utah. Sheeprock, 1972. #1:/Utah-Arches National Park/crb00586 ID. Colton, R.B. 586ct Arches National Park, Utah. Telescopic view of the Three Gossips, 1972. #1:/Utah-Arches National Park/crb00588 ID. Colton, R.B. 588ct Arches National Park, Utah. Pinnacle in the background, 1972. #1:/Utah-Arches National Park/crb00590 ID. Colton, R.B. 590ct Arches National Park, Utah. La Sal mountains seen from the park 1972. #1:/Utah-Arches National Park/crb00592 ID. Colton, R.B. 592ct Arches National Park, Utah. Transverse view of Balanced Rock, 1972. #1:/Utah-Arches National Park/crb00593 ID. Colton, R.B. 593ct Arches National Park, Utah. Balance Rock perpendicular to photo crb00592. 1972. #1:/Utah-Arches National Park/crb00594 ID. Colton, R.B. 594ct Arches National Park, Utah. Garden of Eden, La Sal Mountains in the background. 1972. #1:/Utah-Arches National Park/crb00596 ID. Colton, R.B. 596ct Arches National Park, Utah. Windows section, 1972. #1:/Utah-Arches National Park/crb00597 ID. Colton, R.B. 597ct Arches National Park, Utah. North Window arch, 1972. #1:/Utah-Arches National Park/crb00599 ID. Colton, R.B. 599ct Arches National Park, Utah. Turret Arch, the largest arch is 39 feet wide and 64 feet high; the smaller one is 12 feet wide and 13 feet high, viewed toward the southwest. 1972. #1:/Utah-Arches National Park/crb00600 ID. Colton, R.B. 600ct Arches National Park, Utah. North and South Windows Arches, 1972. #1:/Utah-Arches National Park/crb00601 ID. Colton, R.B. 601ct Arches National Park, Utah. North Window Arches, 1972. #1:/Utah-Arches National Park/crb00603 ID. Colton, R.B. 603ct Arches National Park, Utah. Distant view of Turret Arch, 1972. #1:/Utah-Arches National Park/crb00604 ID. Colton, R.B. 604ct Arches National Park, Utah. Double Arch and its southwestward pedestal. 1972. #1:/Utah-Arches National Park/crb00606 ID. Colton, R.B. 606ct Arches National Park, Utah. Parades of Elephants notice the fanciful head, trunk, and profile of an elephant looking at the observer as if it's walking. 1972. #1:/Utah-Arches National Park/crb00607 ID. Colton, R.B. 607ct Arches National Park, Utah. Delicate Arch with La Sal Mountains in the distance. 1972. #1:/Utah-Arches National Park/crb00610 ID. Colton, R.B. 610ct Arches National Park, Utah. Delicate Arch with tourist providing a perspective, and the cautionary National Parks sign, 1972. #1:/Utah-Arches National Park/crb00611 ID. Colton, R.B. 611ct Arches National Park, Utah. Telescopically through of the Delicate Arch and the La Sal Mountains in the distance. 1972. #1:/Utah-Arches National Park/crb00613 ID. Colton, R.B. 613ct Arches National Park, Utah. Fiery Furnace, 1972. #1:/Utah-Arches National Park/crb00614 ID. Colton, R.B. 614ct Arches National Park, Utah. Devil's Garden, 1972. #1:/Utah-Arches National Park/crb00615 ID. Colton, R.B. 615ct Arches National Park, Utah. Spires north of Devil's Garden. 1972. #1:/Utah-Arches National Park/crb00616 ID. Colton, R.B. 616ct Arches National Park, Utah. Landscape Arch, 1972. #1:/Utah-Arches National Park/crb00621 ID. Colton, R.B. 621ct Arches National Park, Utah. Fins viewed on the trail to Double O arch, notice the resemblance to a school of fish breaking the surface and seeming to swim in one direction. 1972. #1:/Utah-Arches National Park/crb00623 ID. Colton, R.B. 623ct Arches National Park, Utah. Fins viewed on the trail to Double O arch, notice the resemblance to a school of fish breaking the surface and seeming to swim in one direction, probably perpendicular to photo crb00621. 1972. #1:/Canyonlands National Park/crb00628 ID. Colton, R.B. 628ct Canyonlands National Park, Utah. The Needles. 1972. #1:/Canyonlands National Park/crb00629 ID. Colton, R.B. 629ct Canyonlands National Park, Utah. Wooden Shoe. 1972. #1:/Canyonlands National Park/crb00630 ID. Colton, R.B. 630ct Canyonlands National Park, Utah. North Six Shooter Peak. 1972. #1:/Canyonlands National Park/crb00632 ID. Colton, R.B. 632ct Canyonlands National Park, Utah. Newspaper Rock, a collection of petroglyths, 1972. #1:/Canyonlands National Park/crb00633 ID. Colton, R.B. 633ct Canyonlands National Park, Utah. A detail of Newspaper Rock, a collection of petroglyths 1972. #1:/Canyonlands National Park/crb00638 ID. Colton, R.B. 638ct Canyonlands National Park, Utah. Wilson Arch, 1972. #1:/Canyonlands National Park/crb00641 ID. Colton, R.B. 641ct Canyonlands National Park, Utah. Green River, Mineral Hill area, 1972. #1:/Canyonlands National Park/crb00643 ID. Colton, R.B. 643ct Canyonlands National Park, Utah. Dead horse point, 1972. #1:/Canyonlands National Park/crb00644 ID. Colton, R.B. 644ct Canyonlands National Park, Utah. Dead horse Point. 1972. #1:/Canyonlands National Park/crb00646 ID. Colton, R.B. 646ct Canyonlands National Park, Utah. Dead horse Point. 1972. #1:/Canyonlands National Park/crb00647 ID. Colton, R.B. 647ct Canyonlands National Park, Utah. Dead horse Point. 1972. #1:/Canyonlands National Park/crb00648 ID. Colton, R.B. 648ct Canyonlands National Park, Utah. Dead horse Point. 1972. #1:/Canyonlands National Park/crb00650 ID. Colton, R.B. 650ct Canyonlands National Park, Utah. Dead horse Point. 1972. #1:/Wyoming-Devils Tower/crb00651 ID. Colton, R.B. 651ct Devils Tower National Monument, Wyoming, columnar structure from very close to the base. 1953. #1:/Wyoming-Devils Tower/crb00652 ID. Colton, R.B. 652ct Devils Tower National Monument, Wyoming, from state route 24 southwest of it. 1953. #1:/Wyoming-Devils Tower/crb00653 ID. Colton, R.B. 653ct Devils Tower National Monument, Wyoming. Devils Tower, viewed from the west, showing distinctive jointing. 1953. #1:/Wyoming-Yellowstone/crb00654 ID. Colton, R.B. 654ct Yellowstone National Park, Wyoming. Old Faithful in eruption: Crowd of viewing tourists. 1971. #1:/Wyoming-Yellowstone/crb00655 ID. Colton, R.B. 655ct Yellowstone National Park, Wyoming. Paint Pots, 1971. #1:/Montana- Hebgen Lake, Earthquake/crb00656 ID. Colton, R.B. 656ct Hebgen Lake, Montana, Earthquake August 1959. Close-up of fractured Highway 287: man inspecting damage. #1:/Montana- Hebgen Lake, Earthquake/crb00657 ID. Colton, R.B. 657ct Hebgen Lake, Montana, Earthquake August 1959. Fractured Highway 287, near large alcove created, looking east, men provide scale. #1:/Montana- Hebgen Lake, Earthquake/crb00658 ID. Colton, R.B. 658ct Hebgen Lake, Montana, Earthquake August 1959. Fractured Highway 287, near Hebgen Lake, people and cars for scale. #1:/Montana- Hebgen Lake, Earthquake/crb00659 ID. Colton, R.B. 659ct Hebgen Lake, Montana, Earthquake August 1959. Fractured Highway 287, near Hebgen Lake. #1:/ Arizona-Grand Canyon/crb00660 ID. Colton, R.B. 660ct Grand Canyon National Park, Arizona. Looking toward Bralina Temple from top of Bright Angel trail. May 16, 1953 #1:/ Arizona-Grand Canyon/crb00661 ID. Colton, R.B. 661ct Grand Canyon National Park, Arizona. Colorado gorge from Hopi House, May 16, 1953 #1:/ Arizona-Grand Canyon/crb00662 ID. Colton, R.B. 662ct Grand Canyon National Park, Arizona. Down on to Bright Angel trail. May 16, 1953. #1:/ Arizona-Grand Canyon/crb00663 ID. Colton, R.B. 663ct Grand Canyon National Park, Arizona. Down into canyon from Powell's Point. May 16, 1953. #1:/ Arizona-Grand Canyon/crb00664 ID. Colton, R.B. 664ct Grand Canyon National Park, Arizona. Moran Point, May 17, 1953. #1:/ Arizona-Grand Canyon/crb00666 ID. Colton, R.B. 666ct Grand Canyon National Park, Arizona. Viewed from Desert View. May17, 1953 #1:/Utah-Zion/crb00667 ID. Colton, R.B. 667ct Zion National Park, Utah. Navajo Sandstone, viewed from a tunnel window across Pine Creek, May 9, 1953. #1:/Utah-Zion/crb00668 ID. Colton, R.B. 668ct Zion National Park, Utah. Navajo Sandstone, viewed from a tunnel window across Pine Creek: The Sentinel and Mount Spry in the distance. May 9, 1953. #1:/Utah-Zion/crb00669 ID. Colton, R.B. 669ct Zion National Park, Utah. Checkerboard Mesa, showing pronounced cross bedding, May 9, 1953. #1:/Utah-Zion/crb00670 ID. Colton, R.B. 670ct Zion National Park, Utah. Cathedral Mountain, looking north-northeast, May 9, 1953. #1:/New York and Canada-Niagara Falls/crb00671 ID. Colton, R.B. 671ct Niagara Falls, New York and Canada: American Falls, from observation platform. May 31, 1953. #1:/New York and Canada-Niagara Falls/crb00672 ID. Colton, R.B. 672ct Niagara Falls, New York and Canada: Horseshoe Falls, from Canada. May 31, 1953. #1:/New York and Canada-Niagara Falls/crb00673 ID. Colton, R.B. 673ct Niagara Falls, New York and Canada: American Falls, from Three Sisters. May 31, 1953. #1:/New York and Canada-Niagara Falls/crb00674 ID. Colton, R.B. 674ct Niagara Falls, New York and Canada: Horseshoe falls from Cave of the winds. May 31, 1953. #1:/ Arizona-Sunset Crater/crb00675 ID. Colton, R.B. 675ct Sunset Crater Volcano National Monument, Arizona. From crater looking down on cinder cone and lava flow of 11th century. May 17, 1953 #1:/ Arizona-Sunset Crater/crb00676 ID. Colton, R.B. 676ct Sunset Crater Volcano National Monument, Arizona. Bonito lava flow, fissure, person for scale. May 17, 1953. #1:/ Arizona-Sunset Crater/crb00677 ID. Colton, R.B. 677ct Sunset Crater Volcano National Monument, Arizona. Lava flow margin, person for scale. May 17, 1953. #1:/Utah-Zion/crb00678 ID. Colton, R.B. 678ct Zion National Park, Utah. Cathedral Mountain, May 9, 1953. #1:/Colorado- Mesa Verde/crb00682 ID. Colton, R.B. 682ct Mesa Verde National Park, Colorado. Cliff Palace is the largest cliff dwelling. The ledge is Cliff House Sandstone Member of Mesa Verde Formation. May 18, 1953. #1:/Colorado- Mesa Verde/crb00683 ID. Colton, R.B. 683ct Mesa Verde National Park, Colorado. Fire Temple ruins. May 18, 1953. #1:/Colorado- Mesa Verde/crb00685 ID. Colton, R.B. 685ct Mesa Verde National Park, Colorado. Square Tower House, a cliff dwelling under an overhanging edge of Cliff House Sandstone Member of Mesa Verde Formation. May 18, 1953. #1:/Arizona- Wupatki/crb00686 ID. Colton, R.B. 686ct Wupatki National Monument, Arizona. Pueblo ruins of Wupatki looking southeast. Wupatki means long house in the Hopi language. Wupatki is the most important ruin in the San Francisco Mountain region. May 17, 1953. #1:/Arizona- Wupatki/crb00687 ID. Colton, R.B. 687ct Wupatki National Monument, Arizona. Ruins of Wupatki, looking northwest.. Wupatki means long house in the Hopi language. Wupatki is the most important ruin in the San Francisco Mountain region. Abandonment took place around 1250.May 17, 1953. #1:/Japan-Fuji/crb00690 ID. Colton, R.B. 690ct Mount Fuji, seen from Atami, Japan. 1974. #1:/Tennessee Professional paper 108/sew00466 ID. Shaw, E.W. 466 Illustrating reddening and probable concentration of iron compounds near surface; red sand with much iron oxide over impervious white clay, Grand Junction, Hardeman County, Tennessee. 1913. Plate 57-C in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew00474 ID. Shaw, E.W. 474 Illustrating reddening and probable concentration of iron compounds near surface; One mile south-southeast of Oxford; upper part of white is impervious clay and basal part of overlying red sand is more than half iron oxide. Lafayette County, Mississippi. October 12, 1913. Plate 57-E in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew00478 ID. Shaw, E.W. 478 Stratification and general appearance of material formerly regarded as "Lafayette Formation," at and near Oxford, the type locality, now regarded as belonging to the Wilcox group. Uneven interfingering beds of clay and sand three-fourths of mile north of Oxford. Lafayette County, Mississippi. October 12, 1913. Plate 47-A in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew00481 ID. Shaw, E.W. 481 Illustrating occurrence and mode of development and the excellent exposures afforded by old-field gullies; such gullies may have played an important part in the Pliocene erosion of the region, though they were no doubt much less numerous than today. The part played by the sod in resisting erosion is well shown. Many of the gullies have rounded instead of V-shaped head and evidently grow neither through erosion by water flowing into their heads nor through softening of materials by underground water issuing as a seepage, but only because of the fact that the rain which falls in them finds erosion easier than that which falls on sodded areas; at Oxford; shows filling after deep erosion. Lafayette County, Mississippi. October 12, 1913. Plate 59-H in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew00483 ID. Shaw, E.W. 483 Stratification and general appearance of massive, cross-bedded, and laminated material formerly included in the "Lafayette Formation," Now interpreted as belonging with various formations underlying Mississippi. Doubly cross-bedded sand of Wilcox group half mile north of Oxford. Lafayette County, Mississippi. October 12, 1913. Plate 46-H in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew00485 ID. Shaw, E.W. 485 Residuum or material in place but modified somewhat by weathering, though little if any part has been removed. The residuum seems to contain material brought to it in solution and in form of minute particles by the way of pores, from the strata removed in the Pliocene and other epochs. Wilcox group at Oxford. Lafayette County, Mississippi. October 13, 1913. Plate 56-C in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew00500 ID. Shaw, E.W. 500 Stratigraphic relations of Pliocene terrace deposits; terrace deposit overlain by loess 1.5 miles south of Edwards; apparently gradation from one to the other probably due to creep. Hinds County, Mississippi. October 19, 1913. Plate 49-F in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew00517 ID. Shaw, E.W. 517 Illustrating reddening and probable concentration of iron compounds near surface; gravel composed of hollow pebbles of iron oxide 1 mile north of wharf at Natchez, Mississippi. 1913. Plate 57-B in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01028 ID. Shaw, E.W. 1028 Typical exposures of colluvium, the colluvium shows little or stratification and contains quartz pebbles and other elements commonly lacking in underlying formations, also angular fragments of iron cemented sandstone; distribution of pebbles in subsoil 1.5 miles east of Iuka, Tishomingo County, Mississippi. September 16, 1914. Plate 52-E in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01032 ID. Shaw, E.W. 1032 Stratification and general appearance of massive, cross-bedded, and laminated material formerly included in the "Lafayette Formation," Now interpreted as belonging with various formations underlying Mississippi. Indistinctly cross-bedded gravel 5 miles southeast of Iuka. Lafayette County, Mississippi. September 16, 1914. Plate 46-B in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01043 ID. Shaw, E.W. 1043 Stratification and general appearance of massive, cross-bedded, and laminated material formerly included in the "Lafayette Formation," Now interpreted as belonging with various formations underlying Mississippi. Indistinctly cross-bedded sand of Eutaw formation(?), with clay pebbles and streaks, 1 mile east of Iuka; altitude 600 feet Lafayette County, Mississippi. September 19, 1914. Plate 46-D in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01060 ID. Shaw, E.W. 1060 Exposures suggestive of origin of colluvium, showing particularly that it commonly fills hollows and is in some places though rarely double, colluvium with uneven base half mile west of Iuka. Tishomingo County, Mississippi. September 21, 1914. Plate 53-F in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01061 ID. Shaw, E.W. 1061 Exposures suggestive of origin of colluvium, showing particularly that it commonly fills hollows and is in some places though rarely double; colluvium with very uneven base, 1 mile west of Iuka. Tishomingo County, Mississippi. September 21, 1914. Plate 53-D in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew1063a ID. Shaw, E.W. 1063a Exposures suggestive of origin of colluvium, showing particularly that it commonly fills hollows and is in some places though rarely double; double (?) colluvium half mile west of Iuka, upper 8 or 10 feet is from railway cut; below are two layers, each several feet thick, with quartz pebbles at base. Tishomingo County, Mississippi. September 22, 1914. Plate 53-H in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01064 ID. Shaw, E.W. 1064 Stratification and general appearance of material formerly regarded as "Lafayette Formation," at and near Oxford, the type locality, now regarded as belonging to the Wilcox group. Intraformational unconformity between stratified reddish sand and white clay half mile east of Oxford. Lafayette County, Mississippi. September 23, 1914. Plate 47-C in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01067 ID. Shaw, E.W. 1067 Stratification and general appearance of massive, cross-bedded, and laminated material formerly included in the "Lafayette Formation," Now interpreted as belonging with various formations underlying Mississippi. Cross-bedded silty sand of Wilcox group at Bailey's Spring, 1 mile southeast of square at Oxford. Lafayette County, Mississippi. September 24, 1914. Plate 46-E in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01069 ID. Shaw, E.W. 1069 Exposures suggestive of origin of colluvium, showing particularly that it commonly fills hollows and is in some places though rarely double; colluvium with angular fragments of iron-cemented sandstone at base. Fourmile Creek, 2 miles east of Oxford. Lafayette County, Mississippi. September 24, 1914. Plate 53-E in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01070 ID. Shaw, E.W. 1070 Illustrating reddening and probable concentration of iron compounds near surface, west side of Fourmile Creek, 2 miles east of Oxford. Lafayette County, Mississippi. September 24, 1914. Plate 57-D in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01071 ID. Shaw, E.W. 1071 Stratification and general appearance of material formerly regarded as "Lafayette Formation," at and near Oxford, the type locality, now regarded as belonging to the Wilcox group. Peculiar stratification of silty sand on east side of Fourmile Creek, 2 miles east of Oxford. Lafayette County, Mississippi. September 24, 1914. Plate 47-G in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01072 ID. Shaw, E.W. 1072 Typical exposures of colluvium, the colluvium shows little or stratification and contains quartz pebbles and other elements commonly lacking in underlying formations, also angular fragments of iron cemented sandstone. Colluvium with fragments of iron cemented sandstone at base, south edge of Oxford. Lafayette County, Mississippi. September 24, 1914. Plate 52-B in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01073 ID. Shaw, E.W. 1073 Stratification and general appearance of massive, cross-bedded, and laminated material formerly included in the "Lafayette Formation," Now interpreted as belonging with various formations underlying Mississippi. Thin, hard evenly bedded white clay 6.5miles southeast of Oxford. Lafayette County, Mississippi. September 26, 1914. Plate 46-G in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01074 ID. Shaw, E.W. 1074 Stratification and general appearance of Pliocene and early Pleistocene terrace deposits, most of which have been classified as "Lafayette Formation." The strata seems to range generally from 5 to 10 feet in thickness and to be comparatively persistent and yet lenticular and theses seem to be diagnostic features; 6.5 miles southeast of Oxford. Lafayette County, Mississippi. September 26, 1914. Plate 48-C in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01077 ID. Shaw, E.W. 1077 Illustrating occurrence and mode of development and the excellent exposures afforded by old-field gullies; such gullies may have played an important part in the Pliocene erosion of the region, though they were no doubt much less numerous than today. The part played by the sod in resisting erosion is well shown. Many of the gullies have rounded instead of V-shaped head and evidently grow neither through erosion by water flowing into their heads nor through softening of materials by underground water issuing as a seepage, but only because of the fact that the rain which falls in them finds erosion easier than that which falls on sodded areas; recent colluvium on border of flood plain 1.25 miles south of Delay. Lafayette County, Mississippi. September 26, 1914. Plate 59-A in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01080 ID. Shaw, E.W. 1080 Stratification and general appearance of material formerly regarded as "Lafayette Formation," at and near Oxford, the type locality, now regarded as belonging to the Wilcox group: somewhat indistinct, uneven interfingering beds of clay and sand three- fourths of a mile north of Oxford. Lafayette County, Mississippi. September 27, 1914. Plate 47-D in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew1080a ID. Shaw, E.W. 1080a Illustrating reddening and probable concentration of iron compounds near surface, three- fourths mile north of Oxford. Lafayette County, Mississippi. September 27, 1914. Plate 57-F in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01081 ID. Shaw, E.W. 1081 Illustrating reddening and probable concentration of iron compounds near surface, 1 mile north of station at Oxford. Lafayette County, Mississippi. September 27, 1914. Plate 57- A in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01082 ID. Shaw, E.W. 1082 Illustrating reddening and probable concentration of iron compounds near surface, three- fourths mile south Oxford. Lafayette County, Mississippi. September 27, 1914. Plate 57-G in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01086 ID. Shaw, E.W. 1086 Stratification and general appearance of massive, cross-bedded, and laminated material formerly included in the "Lafayette Formation," Now interpreted as belonging with various formations underlying Mississippi. Massive purple clay of Wilcox group in bottom of Isom Ravine, Oxford Lafayette County, Mississippi. September 26, 1914. Plate 46-F in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01089 ID. Shaw, E.W. 1089 Typical exposures of colluvium; the colluvium shows little or stratification and contains quartz pebbles and other elements commonly lacking in underlying formations, also angular fragments of iron cemented sandstone. Colluvium about 2 feet thick, overlain by 2 feet of loess and underlain by Wilcox group, with an old soil at top, half mile north of station at Oxford. Lafayette County, Mississippi. September 26, 1914. Plate 52-A in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01092 ID. Shaw, E.W. 1092 Stratification and general appearance of material formerly regarded as "Lafayette Formation," at and near Oxford, the type locality, now regarded as belonging to the Wilcox group. Sharply defined interfingering beds of white clay and red sands 1 mile north of Oxford. Lafayette County, Mississippi. September 27, 1914. Plate 47-F in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01093 ID. Shaw, E.W. 1093 Remarkable pocket-like features, suggesting filled burrows or potholes, and pebbles and boulders of quartz and quartzite from colluvium. Quartzite in place in colluvium three- fourths of a mile north of Oxford. Lafayette County, Mississippi. September 27, 1914. Plate 55-G in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01096 ID. Shaw, E.W. 1096 Stratification and general appearance of material formerly regarded as "Lafayette Formation," at and near Oxford, the type locality, now regarded as belonging to the Wilcox group. Heavy beds of sand and clay 3 miles west of Oxford. Lafayette County, Mississippi. September 27, 1914. Plate 47-E in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01097 ID. Shaw, E.W. 1097 Stratification and general appearance of material formerly regarded as "Lafayette Formation," at and near Oxford, the type locality, now regarded as belonging to the Wilcox group. "Jumbled" clay balls and lenses 4 miles west of Oxford. Lafayette County, Mississippi. September 28, 1914. Plate 47-B in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01099 ID. Shaw, E.W. 1099 Illustrating occurrence and mode of development and the excellent exposures afforded by old-field gullies; such gullies may have played an important part in the Pliocene erosion of the region, though they were no doubt much less numerous than today. The part played by the sod in resisting erosion is well shown. Many of the gullies have rounded instead of V-shaped head and evidently grow neither through erosion by water flowing into their heads nor through softening of materials by underground water issuing as a seepage, but only because of the fact that the rain which falls in them finds erosion easier than that which falls on sodded areas; 7 miles west of Oxford. Lafayette County, Mississippi. September 28, 1914. Plate 59-E in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01100 ID. Shaw, E.W. 1100 Illustrating occurrence and mode of development and the excellent exposures afforded by old-field gullies; such gullies may have played an important part in the Pliocene erosion of the region, though they were no doubt much less numerous than today. The part played by the sod in resisting erosion is well shown. Many of the gullies have rounded instead of V-shaped head and evidently grow neither through erosion by water flowing into their heads nor through softening of materials by underground water issuing as a seepage, but only because of the fact that the rain which falls in them finds erosion easier than that which falls on sodded areas; 12 east of Batesville. Panola County, Mississippi. September 28, 1914. Plate 59-D in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01101 ID. Shaw, E.W. 1101 Illustrating occurrence and mode of development and the excellent exposures afforded by old-field gullies; such gullies may have played an important part in the Pliocene erosion of the region, though they were no doubt much less numerous than today. The part played by the sod in resisting erosion is well shown. Many of the gullies have rounded instead of V-shaped head and evidently grow neither through erosion by water flowing into their heads nor through softening of materials by underground water issuing as a seepage, but only because of the fact that the rain which falls in them finds erosion easier than that which falls on sodded areas; 12 miles west of Oxford. Lafayette County, Mississippi. October 1, 1914. Plate 59-F in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01105 ID. Shaw, E.W. 1105 Illustrating occurrence and mode of development and the excellent exposures afforded by old-field gullies; such gullies may have played an important part in the Pliocene erosion of the region, though they were no doubt much less numerous than today. The part played by the sod in resisting erosion is well shown. Many of the gullies have rounded instead of V-shaped head and evidently grow neither through erosion by water flowing into their heads nor through softening of materials by underground water issuing as a seepage, but only because of the fact that the rain which falls in them finds erosion easier than that which falls on sodded areas; 15 miles east of Batesville. Panola County, Mississippi. September 28, 1914. Plate 59-G in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01107 ID. Shaw, E.W. 1107 Stratification and general appearance of massive, cross-bedded, and laminated material formerly included in the "Lafayette Formation," Now interpreted as belonging with various formations underlying Mississippi. Thin wavy-bedded silty sand with embedded fragments of iron cemented sandstone 5 miles east of Batesville. Panola County, Mississippi. September 28, 1914. Plate 46-A in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew1113a ID. Shaw, E.W. 1113a Stratigraphic relations of Pliocene terrace deposits; terrace deposits resting on strata of Wilcox group and overlain by 2 feet of loess 4.5 miles east of Batesville. Panola County, Mississippi. September 29, 1914. Plate 49-A in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01116 ID. Shaw, E.W. 1116 Stratification and general appearance of Pliocene and early Pleistocene terrace deposits, most of which have been classified as "Lafayette Formation." The strata seems to range generally from 5 to 10 feet in thickness and to be comparatively persistent and yet lenticular and theses seem to be diagnostic features; 3.5 miles east of Batesville. Panola County, Mississippi. September 29, 1914. Plate 48-A in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01117 ID. Shaw, E.W. 1117 Stratification and general appearance of Pliocene and early Pleistocene terrace deposits, most of which have been classified as "Lafayette Formation." The strata seems to range generally from 5 to 10 feet in thickness and to be comparatively persistent and yet lenticular and theses seem to be diagnostic features; 3.5 miles east of Batesville. Panola County, Mississippi. September 29, 1914. Plate 48-A in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01118 ID. Shaw, E.W. 1118 Stratification and general appearance of Pliocene and early Pleistocene terrace deposits, most of which have been classified as "Lafayette Formation." The strata seems to range generally from 5 to 10 feet in thickness and to be comparatively persistent and yet lenticular and theses seem to be diagnostic features; 3 miles east of Batesville. Panola County, Mississippi. September 29, 1914. Plate 48-B in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01120 ID. Shaw, E.W. 1120 Uneven bedding and gravelly portions of Pliocene terrace deposits, undulating bedding plane with old soil 3 miles east of Batesville. Panola County, Mississippi. September 29, 1914. Plate 51-D in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01124 ID. Shaw, E.W. 1124 Uneven bedding and gravelly portions of Pliocene terrace deposits; evenly stratified red gravel 2 miles north of Batesville. Panola County, Mississippi. September 29, 1914. Plate 51-A in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01125 ID. Shaw, E.W. 1125 Stratigraphic relations of Pliocene terrace deposits; eastern edge of terrace deposit resting on Wilcox group and overlain by loess 2.5 miles north of Batesville. Panola County, Mississippi. September 29, 1914. Plate 49-D in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01129 ID. Shaw, E.W. 1129 Stratigraphic relations of Pliocene terrace deposits; terrace deposit resting on strata of Wilcox group and overlain by 2 feet of loess 5 miles northeast of Sardis. Panola County, Mississippi. September 29, 1914. Plate 49-B in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01133 ID. Shaw, E.W. 1133 Recently formed deposits of known origin and history, somewhat resembling the older colluvium but still differing rather markedly. Product of creep half mile south of Oxford. Lafayette County, Mississippi. October 1, 1914. Plate 54-B in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01137 ID. Shaw, E.W. 1137 Stratification and general appearance of material formerly regarded as "Lafayette Formation," at and near Oxford, the type locality, now regarded as belonging to the Wilcox group. Irregular stratification of sand 1 mile south of Oxford. Lafayette County, Mississippi. October 1, 1914. Plate 47-H in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01139 ID. Shaw, E.W. 1139 Illustrating peneplain and monadnocks: Thackers Mountain, a monadock, from point 5.5 miles south of Oxford. Lafayette County, Mississippi. October 1, 1914. Plate 60-C in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01140 ID. Shaw, E.W. 1140 Illustrating reddening and probable concentration of iron compounds near the surface, 4.5 miles south of Oxford; sand is white under clay lens showing in upper part of view but reddened to each side. Lafayette County, Mississippi. October 2, 1914. Plate 57-H in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01141 ID. Shaw, E.W. 1141 Residuum or material in place but modified somewhat by weathering, though little if any part as been removed. Wilcox group 6.5 miles east of Sardis. Panola County, Mississippi. October 3, 1914. Plate 56-E in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01147 ID. Shaw, E.W. 1147 Remarkable pocket-like features, suggesting filled burrows or potholes, and pebbles and boulders of quartz and quartzite from colluvium. Botryoidal quartzite from colluvium 5.5 miles south of Oxford. Lafayette County, Mississippi. October 4, 1914. Plate 55-F in U.S. Geological Survey. Professional paper 108. 1918 #1:/Mississippi-Professional paper 108/sew01148 ID. Shaw, E.W. 1148 Remarkable pocket-like features, suggesting filled burrows or potholes, and pebbles and boulders of quartz and quartzite from colluvium. Botryoidal quartzite from colluvium 5.5 miles south of Oxford. Lafayette County, Mississippi. October 4, 1914. Plate 55-B in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01154 ID. Shaw, E.W. 1154 Remarkable pocket-like features, suggesting filled burrows or potholes, and pebbles and boulders of quartz and quartzite from colluvium; pebbles and blocks of quartz and quartzite from colluvium 1 mile northeast of Buford Mills. Lafayette County, Mississippi. October 3, 1914. Plate 55-D in U.S. Geological Survey. Professional paper 108. 1918 #1:/Mississippi-Professional paper 108/sew01157 ID. Shaw, E.W. 1157 Illustrating occurrence and mode of development and the excellent exposures afforded by old-field gullies; such gullies may have played an important part in the Pliocene erosion of the region, though they were no doubt much less numerous than today. The part played by the sod in resisting erosion is well shown. Many of the gullies have rounded instead of V-shaped head and evidently grow neither through erosion by water flowing into their heads nor through softening of materials by underground water issuing as a seepage, but only because of the fact that the rain which falls in them finds erosion easier than that which falls on sodded areas; 5 miles west of Grenada. Grenada County Mississippi. October 5, 1914. Plate 59-C in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01163 ID. Shaw, E.W. 1163 Stratification and general appearance of Pliocene and early Pleistocene terrace deposits, most of which have been classified as "Lafayette Formation." The strata seems to range generally from 5 to 10 feet in thickness and to be comparatively persistent and yet lenticular and theses seem to be diagnostic features; 8.5 miles west of Grenada, Grenada County, Mississippi. October 5, 1914. Plate 48-H in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01170 ID. Shaw, E.W. 1170 Recently formed deposits of known origin and history, somewhat resembling the older colluvium but still differing rather markedly. Small filled gully 5.5 miles east of Grenada. Grenada County, Mississippi. October 7, 1914. Plate 54-E in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01182 ID. Shaw, E.W. 1182 Stratification and general appearance of Pliocene and early Pleistocene terrace deposits, most of which have been classified as "Lafayette Formation." The strata seems to range generally from 5 to 10 feet in thickness and to be comparatively persistent and yet lenticular and theses seem to be diagnostic features; west end of main part of petrified forest 3 miles southwest of Flora. Madison County, Mississippi. October 9, 1914. Plate 48-F in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01187 ID. Shaw, E.W. 1187 Recently formed deposits of known origin and history, somewhat resembling the older colluvium but still differing rather markedly. Exposure 7 miles northeast of Canton showing coarse material left behind in a wash; perhaps the old colluvium was formed in part by the burial of residual accumulation of this kind. Madison County, Mississippi. October 13, 1914. Plate 54-A in U.S. Geological Survey. Professional paper 108. 1918. #1:/Alabama-Professional paper 108/sew01207 ID. Shaw, E.W. 1207 Stratigraphic relations of Pliocene terrace deposits; terrace deposits, perhaps somewhat shifted and reworked, resting on Tuscaloosa formation. Tuscaloosa, Tuscaloosa County, Alabama. May 23, 1915. Plate 49-G in U.S. Geological Survey. Professional paper 108. 1918. #1:/Alabama-Professional paper 108/sew01215 ID. Shaw, E.W. 1215 Residuum or material in place but modified somewhat by weathering, though little if any part as been removed. Dr. E.A. Smith believes that much of the iron cementation shown in railway cuts has occurred since the cuts were made, but some is apparently much older, perhaps Pliocene. The residuum seems to contain material brought to it in solution and in form of minute particles by the way of pores, from the strata removed in the Pliocene and other epochs. Tuscaloosa formation 5 miles east of Tuscaloosa. Tuscaloosa County, Alabama. May 27, 1915. Plate 56-A in U.S. Geological Survey. Professional paper 108. 1918. #1:/Alabama-Professional paper 108/sew01218 ID. Shaw, E.W. 1218 Stratigraphic relations of Pliocene terrace deposits; reworked terrace gravel on deformed and eroded edges of Tuscaloosa formation, Cottondale, Tuscaloosa County, Alabama. May 27, 1915. Plate 49-C in U.S. Geological Survey. Professional paper 108. 1918. #1:/Alabama-Professional paper 108/sew01220 ID. Shaw, E.W. 1220 Uneven bedding and gravelly portions of Pliocene terrace deposits; gravel in pit on campus at University, Tuscaloosa County, Alabama. May 27, 1915. Plate 51-C in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01237 ID. Shaw, E.W. 1237 Residuum or material in place but modified somewhat by weathering, though little if any part has been removed, Eutaw formation about 1.75 miles northwest of Leedy, Tishomingo County, Mississippi. May 29, 1915. Plate 56-D in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01239 ID. Shaw, E.W. 1239 Typical exposures of colluvium, the colluvium shows little or stratification and contains quartz pebbles and other elements commonly lacking in underlying formations, also angular fragments of iron cemented sandstone; colluvium, from 5 to 15 feet thick, resting on Eutaw formation about 2 miles northwest of Leedy. Tishomingo County, Mississippi. May 29, 1915. Plate 52-C in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01240 ID. Shaw, E.W. 1240 Exposures suggestive of origin of colluvium, showing particularly that it commonly fills hollows and is in some places though rarely double. Panorama of colluvium 10 miles southeast of Corinth; the concretionary mass beneath the collecting bag throws light on the origin of the surficial deposit, for it contains many Eutaw fossils, is very fragile and has evidently been let down from the concretionary layer seen in the distance at a stratigraphic position about 10 feet higher. The concretion is of a kind characteristic of this layer. The associated pebbles, however, are not common, if indeed such pebbles occur at all in the underlying Eutaw formation, and hence the conclusion seems unavoidable that the coarser parts of overlying strata have been concentrated downward in the development of the surficial formation and the none of the material has been transported very far. Alcorn County, Mississippi. May 29, 1915. Plate 53-B in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01241 ID. Shaw, E.W. 1241 Exposures suggestive of origin of colluvium, showing particularly that it commonly fills hollows and is in some places though rarely double. Panorama of colluvium 10 miles southeast of Corinth; the concretionary mass beneath the collecting bag throws light on the origin of the surficial deposit, for it contains many Eutaw fossils, is very fragile and has evidently been let down from the concretionary layer seen in the distance at a stratigraphic position about 10 feet higher. The concretion is of a kind characteristic of this layer. The associated pebbles, however, are not common, if indeed such pebbles occur at all in the underlying Eutaw formation, and hence the conclusion seems unavoidable that the coarser parts of overlying strata have been concentrated downward in the development of the surficial formation and the none of the material has been transported very far. Alcorn County, Mississippi. May 29, 1915. . Plate 53-A in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01244 ID. Shaw, E.W. 1244 Exposures suggestive of origin of colluvium, showing particularly that it commonly fills hollows and is in some places though rarely double. Small valley filled with colluvium 8 miles southeast of Corinth. Alcorn County, Mississippi. May 29, 1915. Plate 53-C in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01251 ID. Shaw, E.W. 1251 Typical exposures of colluvium, the colluvium shows little or stratification and contains quartz pebbles and other elements commonly lacking in underlying formations, also angular fragments of iron cemented sandstone; colluvium, largely red sand with layer of iron-cemented sandstone fragments at base, 4 miles northeast of Holly Springs. Marshall County, Mississippi. May 31, 1915. Plate 52-H in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01255 ID. Shaw, E.W. 1255 Typical exposures of colluvium, the colluvium shows little or stratification and contains quartz pebbles and other elements commonly lacking in underlying formations, also angular fragments of iron cemented sandstone; layer of iron-cemented sandstone fragments and concretions at of colluvium 10 miles northwest of Holly Springs. Marshall County, Mississippi. June 1, 1915. 1914. Plate 52-D in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01257 ID. Shaw, E.W. 1257 Uneven bedding and gravelly portions of Pliocene terrace deposits; uneven bedding planes 9 miles west of Holly Springs; red (dark) material Wilcox group. Marshall County, Mississippi. June 1, 1915. Plate 51-B in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01262 ID. Shaw, E.W. 1262 Recently formed deposits of known origin and history, somewhat resembling the older colluvium but still differing rather markedly; colluvium in bank of small stream 7.25 southeast of Byhalia. Marshall County, Mississippi. June 1, 1915. Plate 54-C in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01264 ID. Shaw, E.W. 1264 Recently formed deposits of known origin and history, somewhat resembling the older colluvium but still differing rather markedly; colluvium in bank of small stream 7.25 miles southeast of Byhalia. Marshall County, Mississippi. June 1, 1915. Plate 54-F in U.S. Geological Survey. Professional paper 108. 1918 #1:/Mississippi-Professional paper 108/sew01265 ID. Shaw, E.W. 1265 Recently formed deposits of known origin and history, somewhat resembling the older colluvium but still differing rather markedly; colluvium in bank of small stream 7.25 miles southeast of Byhalia, somewhat similar to the old colluvium. Marshall County, Mississippi. June 1, 1915. Plate 54-D in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01266 ID. Shaw, E.W. 1266 Uneven bedding and gravelly portions of Pliocene terrace deposits: gravel resting upon Wilcox group 7.5 miles southeast of Byhalia. Marshall County, Mississippi. June 1, 1915. Plate 51-F in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01270 ID. Shaw, E.W. 1270 Residuum or material in place but modified somewhat by weathering, though little if any part as been removed, Wilcox group 2 miles east of Holly Springs. Marshall County, Mississippi. June 2, 1915. Plate 56-B in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01271 ID. Shaw, E.W. 1271 Illustrating peneplain and monadnocks; both of these, peneplain with monadnock in distance 6 miles east of Holly Springs; the road (see sew01273) on the right follows an even-crested divide, whose top was once a part of the peneplain. Marshall County, Mississippi. June 2, 1915. Plate 60-A and B, respectively in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01273 ID. Shaw, E.W. 1273 Illustrating peneplain and monadnocks; both of these, peneplain with monadnock in distance 6 miles east of Holly Springs; the road (see sew01273) on the right follows an even-crested divide, whose top was once a part of the peneplain. Marshall County, Mississippi. June 2, 1915. Plate 60-A and B, respectively in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01275 ID. Shaw, E.W. 1275 Illustrating peneplain and monadnocks; flat plain at altitude of 600 feet (barometric) on Ripley Road 11 miles east of Holly Springs. Marshall County, Mississippi. June 2, 1915. Plate 60-D in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01276 ID. Shaw, E.W. 1276 Residuum or material in place but modified somewhat by weathering, though little if any part as been removed, Wilcox group 13 miles east of Holly Springs. Marshall County, Mississippi. June 2, 1915. Plate 56-F in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01292 ID. Shaw, E.W. 1292 Uneven bedding and gravelly portions of Pliocene terrace deposits: gravel and clay at Rocky Springs. Claiborne County, Mississippi. June 2, 1915. Plate 51-E in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01320 ID. Shaw, E.W. 1320 Stratification and general appearance of Pliocene and early Pleistocene terrace deposits, most of which have been classified as "Lafayette Formation." The strata seems to range generally from 5 to 10 feet in thickness and to be comparatively persistent and yet lenticular and theses seem to be diagnostic features; detail from sew01324; type exposure of Port Hudson formation at Port Hickey, probably early Pleistocene but shows same general form of stratification as Pliocene terrace deposits. Louisiana. June 9, 1915. Plate 48-G in U.S. Geological Survey. Professional paper 108. 1918. #1:/Louisana-Professional paper 108/sew01324 ID. Shaw, E.W. 1324 Stratification and general appearance of Pliocene and early Pleistocene terrace deposits, most of which have been classified as "Lafayette Formation." The strata seems to range generally from 5 to 10 feet in thickness and to be comparatively persistent and yet lenticular and theses seem to be diagnostic features; part of type exposure of Port Hudson formation at Port Hickey, probably early Pleistocene but shows same general form of stratification as Pliocene terrace deposits. Louisiana. June 9, 1915. Plate 48-E in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01353 ID. Shaw, E.W. 1353 Stratigraphic relations of Pliocene terrace deposits; terrace deposit overlain by loess, with well-preserved old soil between, 15 miles east of Yazoo City, Yazoo County, Mississippi. June 17, 1915. Plate 49-E in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/sew01355 ID. Shaw, E.W. 1355 Illustrating occurrence and mode of development and the excellent exposures afforded by old-field gullies; such gullies may have played an important part in the Pliocene erosion of the region, though they were no doubt much less numerous than today. The part played by the sod in resisting erosion is well shown. Many of the gullies have rounded instead of V-shaped head and evidently grow neither through erosion by water flowing into their heads nor through softening of materials by underground water issuing as a seepage, but only because of the fact that the rain which falls in them finds erosion easier than that which falls on sodded areas; 8 miles south-southwest of Yazoo City, Yazoo County, Mississippi. June 17, 1915. Plate 59-B in U.S. Geological Survey. Professional paper 108. 1918. #1:/Alabama-Professional paper 108/sew01498 ID. Shaw, E.W. 1498 Typical exposures of colluvium, the colluvium shows little or stratification and contains quartz pebbles and other elements commonly lacking in underlying formations, also angular fragments of iron cemented sandstone; colluvium resting on Citronelle formation 1 mile south of Lamberts. Mobile County, Alabama. September 15, 1915. Plate 52-G in U.S. Geological Survey. Professional paper 108. 1918 #1:/New York-Bulletin 67/dnh00001 ID. Darton, N.H. 1 Trap sheet in arkose under Palisade Trap, on the shore of Hudson River, four miles south of Haverstraw, Rockland County, New York, looking west. Figure 25 in US Geological Survey Bulletin 67 1890. #1:/New York-Bulletin 67/dnh00006 ID. Darton, N.H. 6 Contact of second Watchung trap with underlying sandstones in quarry on north side of Passaic River below Little Falls. Passaic County, New Jersey. Figure 9 in US Geological Survey Bulletin 67 1890. #1:/New Jersey-Bulletin 67/dnh00013 ID. Darton, N.H. 13 Contact of trap and indurated shales in entrance to West Shore Railroad Tunnel, Weehawken, Looking south Hudson County, New Jersey.. Figure 22 in US Geological Survey Bulletin 67 1890. #1:/New Jersey-Bulletin 67/dnh00015 ID. Darton, N.H. 15 Lateral ascent of base of Palisade Trap across edges of strata in King's Point, looking west. Weehawken, Hudson County, New Jersey. 1888. Plate 5 in US Geological Survey Bulletin 67 1890. Basis for figure 7, a sketch, in U.S. Geological Survey. Folio 83. 1902. #1:/New Jersey-Bulletin 67/dnh00016 ID. Darton, N.H. 16 Lateral ascent of base of Palisade Trap across edges of strata in King's Point, looking west Weehawken, Hudson County, New Jersey. 1888. Plate 5 in US Geological Survey Bulletin 67 1890. Basis for figure 7, a sketch, in U.S. Geological Survey. Folio 83. 1902 #1:/New Jersey-Bulletin 67/dnh00017 ID. Darton, N.H. 17 Lateral ascent of base of Palisade Trap across edges of strata in King's Point, looking west Weehawken, Hudson County, New Jersey. 1888. Plate 5 in US Geological Survey Bulletin 67 1890. Basis for figure 7, a sketch, in U.S. Geological Survey. Folio 83. 1902 #1:/New Jersey-Folio 83/dnh00022 ID. Darton, N.H. 22 Conformable contact of basalt of the first Watchung flow on Newark sandstones below Falls of Passaic, Patterson; the sandstone forms the base of the section immediately above the retaining wall and is overlain by massive bedded lava with fine columnar basalt on top. Passaic County, New Jersey. 1890. Figure 16 in U.S. Geological Survey. Folio 83. 1902; figure 29 in U.S. Geological Survey. Folio 157. 1903; figure 8 in U.S. Geological Survey. Bulletin 67. 1890. #1:/California-Bulletin 79/djs00241 ID. Diller, J.S. 241 Model of the cinder cone and lava field near Snag Lake, ten miles northeast of Lassen Peak. Lassen Volcanic National Park, Shasta, County, California. Figure 1 in US Geological Survey Bulletin 79. 1891. #1:/California-Bulletin 79/djs00915 ID. Diller, J.S. 915 Sketch of cinder cone and lava field from summit of Prospect Peak. Shasta County, California. May 30, 1915. Sketch by H. M. Howells. Plate 1 in US Geological Survey Bulletin 79. 1891. #1:/California-Bulletin 79/djs00280 ID. Diller, J.S. 280 Cinder cone and new lava that came form it. Lassen Volcanic National Park, Shasta County, California. Plate 2 in US Geological Survey Bulletin 79. 1891. #1:/Oregon-Bulletin 89/thw00038 ID. Turner, H.W. 38 Bluff, which terminates the ridge about 2 miles east of clover meadow, showing the stratification of the andsesitic beds. The pinnacles on the left are composed of a coarse andesitic breccia resting unconformably upon the stratified tuffs and conglomerates and underlying the Table Mountain latite, which is not shown. Photo by F. L. Ransome. Tuolumne County, California.1895. Plate 6 in US Geological Survey Bulletin 89. 1898 #1:/Oregon-Bulletin 89/thw00040 ID. Turner, H.W. 40 The Dardanelles from the West, showing the hummocky granitic surface in the foreground and the crest of the Sierra Nevada in the distance. Photo by F. L. Ransome. Alpine County, California 1895. Plate 3 in US Geological Survey Bulletin 89. 1898 #1:/Oregon-Bulletin 89/thw00042 ID. Turner, H.W. 42 Speroidal facies of augite-latite from the Table Mountain Flow. At the western end of a little meadow on the crest of the ridge, about 1 ¼ miles east of Clover Meadow. Photo by F. L. Ransome. Tuolumne County, California. 1895. Plate 8 in US Geological Survey Bulletin 89. 1898 #1:/CaliforniaBulletin 89/thw00043 ID. Turner, H.W. 43 Andesitic conglomerate underlying Table Mountain Flow, 1 ½ miles East of Clover Meadow. This photo shows the imperfect rounding of the volcanic fragments and the rude stratification of the whole. These outlying pinnacles left by differential erosion upon the steep hill slope. Photo by F. L. Ransome. Tuolumne County, California. 1895. Plate 6 in US Geological Survey Bulletin 89. 1898 #1:/Montana-Professional paper 108/caj00582 ID. Collier, A.J. 582 Escarpment of the Flaxville plateau, showing outcrops of cemented sand and the thickness of the Flaxville gravel. T.37 N., R. 42 E. Valley County, Montana. 1915. Plate 63-C in U.S. Geological Survey. Professional paper 108. 1918. #1:/Montana-Professional paper 108/caj00586 ID. Collier, A.J. 586 Cemented gravel interstratified with cemented sand 9 miles northeast of Scobey, T. 36 N., R.49 E. Daniels County, Montana. 1915. Plate 64-A in U.S. Geological Survey. Professional paper 108. 1918. #1:/Montana-Professional paper 108/caj00591 ID. Collier, A.J. 591 Railway cut west of Flaxville, T. 34 N., R. 44 E., Daniels County, Montana. 1915. Plate 65-A in U.S. Geological Survey. Professional paper 108. 1918. #1:/Montana-Professional paper 108/caj00623 ID. Collier, A.J. 623 Escarpment surrounding the late Pliocene or early Pleistocene bench in Milk River valley: sec. 35, T. 33 N., R. 30 E., Phillips County, Montana. 1915. Plate 65-B in U.S. Geological Survey. Professional paper 108. 1918. #1:/Montana-Professional paper 108/caj00629 ID. Collier, A.J. 629 Vandalia dam, Milk River, showing the escarpment surrounding the late Pliocene or early Pleistocene bench sec. 7 T. 30 N., R. 37 E. Valley County, Montana. 1915. Plate 65-C in U.S. Geological Survey. Professional paper 108. 1918. #1:/New Mexico-Professional paper 108/dnh01272 ID. Darton, N.H. 1272 Paleozoic rocks on granite at Capitol Dome, Florida Mountains, looking northeast; agglomerate, Montoya limestone, El Paso limestone; granite. Luna County, New Mexico. Plate 16-B in U.S. Geological Survey. Professional paper 108. 1918. #1:/New Mexico-Professional paper 108/dnh01428 ID. Darton, N.H. 1428 Limestones from Ordovician to Pennsylvanian on granite, Sheep Mountain, San Andres Mountains, looking south; Lake Valley limestone; Percha shale; Montoya limestone; El Paso limestone; granite. Socorro County, New Mexico. Plate 18-A in U.S. Geological Survey. Professional paper 108. 1918. #1:/New Mexico-Professional paper 108/dnh01430 ID. Darton, N.H. 1430 Bliss sandstone in Bennett Canyon, 18 miles northeast of Las Cruces; contact of Bliss sandstone and El Paso limestone. Dona Ana County, New Mexico. Plate 14-A in U.S. Geological Survey. Professional paper 108. 1918. #1:/New Mexico-Professional paper 108/dnh01440 ID. Darton, N.H. 1440 Along west front of Sacramento Mountains at Agua Chiquita Canyon, looking southeast. Montoya limestone; El Paso limestone; granite. Otero County, New Mexico. Plate 21 in U.S. Geological Survey. Professional paper 108. 1918. #1:/New Mexico-Professional paper 108/dnh01537 ID. Darton, N.H. 1537 Looking east out of mouth of Hembrillo Canyon. Fusselman limestone; Montoya limestone; El Paso limestone; Bliss sandstone; granite. East side of San Andres Mountains, west of Alamogordo. Dona Ana County, New Mexico. September 1916. Plate 14-A in U.S. Geological Survey. Professional paper 108. 1918: Plate 3-B in U.S. Geological Survey. Bulletin 794. 1928. #1:/New Mexico-Professional paper 108/dnh01555 ID. Darton, N.H. 1555 North side of entrance to Alamo Canyon, 3 miles southeast of Alamogordo; limestone of Magdalena group; cherty member of Montoya; Fusselman limestone; dark massive member of Montoya; El Paso limestone. Otero County New Mexico. September 1916. Plate 19-A in U.S. Geological Survey. Professional paper 108. 1918: Plate 45-C in U.S. Geological Survey. Bulletin 794. 1928. #1:/New Hampshire-Professional paper 108/kfj00105 ID. Katz, F.J. 105 Gravel pit on Middle Road, Portsmouth; shows stratified gravel, sand, and clay in the inner side of the moraine, containing here and there larger but little-rounded pebbles. Rockingham County, New Hampshire. Plate 12-A in U.S. Geological Survey. Professional paper 108. 1918. #1:/New Hampshire-Professional paper 108/kfj00106 ID. Katz, F.J. 106 Wiggins Gravel pit Portsmouth; shows undulating beds of clean, evenly stratified sand abutting against coarse, unsorted and unstratified gravel. Rockingham County, New Hampshire. Plate 11 in U.S. Geological Survey. Professional paper 108. 1918. #1:/New Hampshire-Professional paper 108/kfj00107 ID. Katz, F.J. 107 Wiggins Gravel pit Portsmouth; shows undulating beds of clean, evenly stratified sand abutting against coarse, unsorted and unstratified gravel. Rockingham County, New Hampshire. Plate 11 in U.S. Geological Survey. Professional paper 108. 1918. #1:/New Hampshire-Professional paper 108/kfj00123 ID. Katz, F.J. 123 West side of inner slope of Newington moraine on bay side road in Newington; the flat surface in the foreground is sandy marine clay. Rockingham County, New Hampshire. Plate 8-A in U.S. Geological Survey. Professional paper 108. 1918. #1:/New Hampshire-Professional paper 108/kfj00132 ID. Katz, F.J. 132 Sand pit in Pine Hill cemetery, Dover; shows irregularly bounded beds and pockets of sorted sands and fine gravel. Strafford County, New Hampshire. Plate 8-B in U.S. Geological Survey. Professional paper 108. 1918. #1:/Maine-Professional paper 108/kfj00135 ID. Katz, F.J. 135 Upper part of pit shows 15 feet of rudely stratified moraine gravel. Gravel pit in Biddeford, York County, Maine. Plate 5-A in U.S. Geological Survey. Professional paper 108. 1918. #1:/Maine-Professional paper 108/kfj00136 ID. Katz, F.J. 136 Lower part of pit; well stratified sand and gravel on inner slope of moraine, these sands are overlain by the gravel show in kfj00135. Gravel pit in Biddeford, York County, Maine. Plate 5-B in U.S. Geological Survey. Professional paper 108. 1918. #1:/New Hampshire-Professional paper 108/kfj00137 ID. Katz, F.J. 137 Moraine gravel on New Road, Portsmouth; coarse, partly rounded material with rude stratification. Rockingham County, New Hampshire. Plate 10-A in U.S. Geological Survey. Professional paper 108. 1918. #1:/New Hampshire-Professional paper 108/kfj00139 ID. Katz, F.J. 139 Moraine gravel on New Road, Portsmouth; coarse material, fairly well rounded, with no sorting or stratification. Rockingham County, New Hampshire. Plate 10-B in U.S. Geological Survey. Professional paper 108. 1918. #1:/Maine-Professional paper 108/kfj00140 ID. Katz, F.J. 140 Moraine front and outwash, Merriland Ridge, Wells; the moraine front is fairly smooth and not sharply separated from the outwash. York County, Maine. Plate 6-A in U.S. Geological Survey. Professional paper 108. 1918. #1:/Maine-Professional paper 108/kfj00143 ID. Katz, F.J. 143 Moraine front and outwash, Merriland Ridge, Wells; the moraine is scalloped and more sharply separated from the outwash. York County, Maine. Plate 6-B in U.S. Geological Survey. Professional paper 108. 1918. #1:/Maine-Professional paper 108/kfj00144 ID. Katz, F.J. 144 South side of railroad cut across Merriland Ridge, Wells; stratified gravels, sand, and clay constitute the moraine and outwash. York County, Maine. Plate 7 in U.S. Geological Survey. Professional paper 108. 1918. #1:/Maine-Professional paper 108/kfj00145 ID. Katz, F.J. 145 South side of railroad cut across Merriland Ridge, Wells; stratified gravels, sand, and clay constitute the moraine and outwash. York County, Maine. Plate 7 in U.S. Geological Survey. Professional paper 108. 1918. #1:/Maine-Professional paper 108/kfj00146 ID. Katz, F.J. 146 South side of railroad cut across Merriland Ridge, Wells; stratified gravels, sand, and clay constitute the moraine and outwash. York County, Maine. Plate 7 in U.S. Geological Survey. Professional paper 108. 1918. #1:/Maine-Professional paper 108/kfj00147 ID. Katz, F.J. 147 Gravels and sand, perhaps of kame origin, in Sunset Hill, Eliot; poorly sorted, unevenly stratified gravel. York County, Maine. Plate 12-B in U.S. Geological Survey. Professional paper 108. 1918. #1:/New Mexico-Professional paper 108/lwt00021 ID. Lee, W.T. 21 West face of Cabollos Mountains near Apache Canyon, looking northeast; Granite; Bliss sandstone. Sierra County, New Mexico. Plate 16-A in U.S. Geological Survey. Professional paper 108. 1918. #1:/New Mexico-Professional paper 108/lwt00024 ID. Lee, W.T. 24 Fault in limestone at Palomas Gap, Cabollos Mountains, looking north. Sierra County, New Mexico. 1904. Plate 17-B in U.S. Geological Survey. Professional paper 108. 1918: Plate 61-B in U.S. Geological Survey, Bulletin 794. 1928. #1:/New Mexico-Professional paper 108/lwt00048 ID. Lee, W.T. 48 West face of Sandia Mountains at Bernalillo; Sandia formation on granite, etc., Bernalillo County, New Mexico. Plate 14-B in U.S. Geological Survey. Professional paper 108. 1918. #1:/Montana-Professional paper 108/rgs00004 ID. Rogers, G.S. 4 Effects of the burning of coal beds in eastern Montana. Coal bed 11 feet thick on Custer Creek near Yellowstone River between Miles City and Terry; to the left the bed is slowly burning but has not yet perceptively affected the overlying strata; to the right it is entirely consumed, leaving only contorted white bands of ash and darker bands formed by the baking of clay partings. Prairie County, Montana. Plate 1-B in U.S. Geological Survey. Professional paper 108. 1918. #1:/Montana-Professional paper 108/rgs00171 ID. Rogers, G.S. 171 Photomicrograph of vesicular slag formed by the burning of coal beds; glassy slag with spherulitic structure. Montana. Plate 2-A in U.S. Geological Survey. Professional paper 108. 1918. #1:/Montana-Professional paper 108/rgs00172 ID. Rogers, G.S. 172 Photomicrograph of vesicular slag formed by the burning of coal beds; holocrystaline slag composed chiefly of diopside and plagioclase. Montana. Plate 2-B in U.S. Geological Survey. Professional paper 108. 1918. #1:/Montana-Professional paper 108/rgs00173 ID. Rogers, G.S. 173 Photomicrograph of holocrystaline slag. Montana. Plate 3 in U.S. Geological Survey. Professional paper 108. 1918. #1:/Montana-Professional paper 108/scd00015 ID. Smith, C.D. 15 Effects of the burning of coal beds in eastern Montana. A chimney or core of hard fused rock projecting through partly baked strata near Miles City, Custer County, Montana. Plate 1-A in U.S. Geological Survey. Professional paper 108. 1918. #1:/Wyoming-Professional paper 108/stw00435 ID. Stanton, T.W. 435 Plant bearing shale in Frontier formation, 1 mile east of Cumberland. Lincoln County, Wyoming. 1910. Plate 27-A in U.S. Geological Survey. Professional paper 108. 1918. #1:/Wyoming-Professional paper 108/stw00601 ID. Stanton, T.W. 601 Badlands in Wasatch formation at fossil locality near the Davis Ranch, Sussex. Johnson County, Wyoming. 1910. Plate 23-A in U.S. Geological Survey. Professional paper 108. 1918. #1:/Wyoming-Professional paper 108/stw00878 ID. Stanton, T.W. 878 White plant bearing shale in Frontier formation south of Little Muddy Creek near Cumberland, probably very near the original Fremont locality. Lincoln County, Wyoming. 1910. Plate 27-B in U.S. Geological Survey. Professional paper 108. 1918 #1:/Mississippi-Professional paper 108/slw00843 ID. Stephenson, L.W. 843 Remarkable pocket-like features, suggesting filled burrows or potholes, and pebbles and boulders of quartz and quartzite from colluvium, filled burrows (?) extending below colluvium 3.75 miles southeast of Corinth. Alcorn County, Mississippi. 1914. Plate 55-A in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/slw00848 ID. Stephenson, L.W. 848 Remarkable pocket-like features, suggesting filled burrows or potholes, and pebbles and boulders of quartz and quartzite from colluvium, filled burrows (?) extending below colluvium 4.5 miles southeast of Corinth. Alcorn County, Mississippi. 1914. Plate 55-C in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/slw00851 ID. Stephenson, L.W. 851 Remarkable pocket-like features, suggesting filled burrows or potholes, and pebbles and boulders of quartz and quartzite from colluvium: near view of one of the filled burrows (?) just northwest of Strickland. Alcorn County, Mississippi. 1914. Plate 55-H in U.S. Geological Survey. Professional paper 108. 1918. #1:/Mississippi-Professional paper 108/slw00853 ID. Stephenson, L.W. 853 Gully filled with colluvium 7.5 miles southeast of Corinth. Alcorn County, Mississippi. 1914. Plate 53-G in U.S. Geological Survey. Professional paper 108. 1918. #1:/Wyoming-Professional paper 108/wch00047 ID. Wegemann, C.H. 47 Great Pine Ridge, formed by outcrop of Fort Union formation, looking south from sec. 7, T. 38 N., R. 76 W. Converse County, Wyoming. 1910. Plate 22-B in U.S. Geological Survey. Professional paper 108. 1918. #1:/Wyoming-Professional paper 108/wch00053 ID. Wegemann, C.H. 53 Sandstone bed in Lance formation, showing large, "concretions" NE ¼ sec. 32. T. 43 N. R. 79 W. Johnson County, Wyoming. 1910. Plate 22-A in U.S. Geological Survey. Professional paper 108. 1918. #1:/Wyoming-Professional paper 108/wch00164 ID. Wegemann, C.H. 164 Kingsbury conglomerate on Kingsbury Ridge, 8 miles southwest of Buffalo. Johnson County, Wyoming. 1910. Plate 23-B in U.S. Geological Survey. Professional paper 108. 1918. #1:/Oklahoma-Bulletin 223/agi00116 ID. Adams, G.I. 116 Glass Mountain, capped with massive gypsum. Woods County, Oklahoma. Circa 1900. Plate 15-A in US. Geological Survey. Bulletin 223. 1904. #1:/Utah-Bulletin 223/bjm00024 ID. Boutwell, J.M. 24 Rock-gypsum deposit 1 mile east of Nephi, Juab County, Utah. December 1902. Plate 19-A in US. Geological Survey. Bulletin 223. 1904. #1:/Alaska-Bulletin 218/caj00073 ID. Collier, A.J. 73 Wood-burning steamer on Yukon, below Eagle. Eagle district, Yukon region, Alaska. 1902. Plate 4-B in US. Geological Survey. Bulletin 218. 1903. #1:/Alaska-Bulletin 218/caj00134 ID. Collier, A.J. 134 Eagle, on Yukon River, seat of U.S. District Court, U.S. Custom House and Fort Egbert, U.S. Military Post. Eagle district, Yukon region, Alaska. 1902. Plate 3-B in US. Geological Survey. Bulletin 218. 1903. #1:/Alaska-Bulletin 218/caj00147 ID. Collier, A.J. 147 Characteristic view of the banks of the Yukon, showing fuel resources. Yukon region, Alaska. 1902. Plate 3-A in US. Geological Survey. Bulletin 218. 1903. #1:/Alaska-Bulletin 218/caj00163 ID. Collier, A.J. 163 Nulato, Indian village, showing wood piles on river beach. Nulato district, Yukon region, Alaska. 1902. Plate 6-B in US. Geological Survey. Bulletin 218. 1903. #1:/Alaska-Bulletin 218/caj00167 ID. Collier, A.J. 167 Williams coal mine 90 miles below Nulato, on Yukon River. Anvik district, Yukon region, Alaska. 1902. Plate 5-B in US. Geological Survey. Bulletin 218. 1903. #1:/Alaska-Bulletin 218/caj00169 ID. Collier, A.J. 169 Barge loading coal at Williams mine. Anvik district, Yukon region, Alaska. 1902. Plate 6-A in US. Geological Survey. Bulletin 218. 1903. #1:/Alaska-Bulletin 229/caj00379 ID. Collier, A.J. 379 Valley of Lost River, from coast. York district, Seward Peninsula region, Alaska. 1901. Plate 3 in US. Geological Survey. Bulletin 229. 1904. #1:/Colorado-Bulletin 182/ccw00400 ID. Cross, C.W. 400 Sheeted structure of the San Juan Breccia above the Silver Link Mine, canyon of the Uncompahgre River. The breccia rests upon the eroded surface of Algonkian schists and quartzites. Ouray County, Colorado. September 1899. Plate 7 in US Geological Survey Bulletin 182. 1901. #1:/Vermont-Bulletin 195/dtn00058 ID. Dale, T.N. 58 Contact of Pre-Cambrian gneiss and Cambrian quartzite, southwest side of the Dome, 2,200-foot contour, Green Mountain Range, Pownal, Bennington County, Vermont. Looking east northeast. A bed of muscovite schist, one foot thick, partly eroded separates the two rocks. Head of sledge rests on gneiss. Circa 1895. Plate 4 in US Geological Survey Bulletin 195. 1901. #1:/Vermont-Bulletin 195/dtn00121 ID. Dale, T.N. 121 Pinched fold in white marble. Hammer, 21 inches long. the lower part of the block consists of impure dolomite. Quarry dumps seven-eights of a mile west of the Owl's Head, Bennington County, Vermont. Circa 1895. Plate 1B in US Geological Survey Bulletin 195. 1901 #1:/Vermont-Bulletin 195/dtn00131 ID. Dale, T.N. 131 Overturned snycline of Cambrian schist, 50 feet east of overthrust; top of Boardman Hill, Claredon, Rutland County, Vermont. Circa 1895. Plate 3 in US Geological Survey Bulletin 195. 1901. #1:/Vermont-Bulletin 195/dtn00133 ID. Dale, T.N. 133 Overturned syncline of Cambrian quartzite adjacent to an overthrust; top of Boardman Hill, Claredon, Rutland County, Vermont. Circa 1895. Plate 2 in US Geological Survey Bulletin 195. 1901. #1:/Massachusetts Bulletin 195/dtn00147 ID. Dale, T.N. 147 Elongated quartzite Fold from Hillock at west end of Main Street, Williamstown, Berkkshire County, Massachusetts. Circa 1895. Plate 1A in US Geological Survey Bulletin 195. 1901. #1:/Oregon-Bulletin 196/djs00437 ID. Diller, J.S. 437 Plateau Front and Coastal Plain south of Chetco, Curry County, Oregon. 1900. Plate 11 in US Geological Survey Bulletin 196. 1902 #1:/California-Bulletin 196/djs00446 ID. Diller, J.S. 446 Earlier valley of Redwood Creek above Redwood house. Elevation 3050 feet. Del Norte County, California. 1900. Plate 13 in US Geological Survey Bulletin 196. 1902. #1:/California-Bulletin 196/djs00447 ID. Diller, J.S. 447 Wildgrass Ridge, capped by gravel bed of the ancient Kalamath River. Looking N. 75° W, from near north line of Hoppa Reservation. 1900. Plate 12 in US Geological Survey Bulletin 196. 1902. #1:/New Mexico-Bulletin 223/hrt00146 ID. Hill, R.T. 146 The White Sands, Otero County, New Mexico. Circa 1900. Plate 18 in US Geological Survey Bulletin 223. 1904. #1:/Colorado-Bulletin 182/rfl00026 ID. Ransome, F.L. 26 Lodes exposed on the south side of Lake Como. Poughkeepsie Gulch, San Juan County, Colorado. 1897. Plate 8 in US Geological Survey Bulletin 182. 1901. #1:/Nevada-Bulletin 208/sje00083 ID. Spurr, J.E. 83 East face of low mountain range west of Egan Range at Ely, White Pine County, Nevada. 1899. Plate 5-A in US Geological Survey Bulletin 208. 1903. #1:/Nevada-Bulletin 208/sje00087 ID. Spurr, J.E. 87 Snake Mountains north of Robinson's Ranch. Elko County, Nevada. 1899. Plate 4-A in US Geological Survey Bulletin 208. 1903. #1:/Nevada-Bulletin 208/sje00089 ID. Spurr, J.E. 89 Antelope Range, east side. White Pine County, Nevada. 1899. Plate 4-B in US Geological Survey Bulletin 208. 1903. #1:/Nevada-Bulletin 208/sje00090 ID. Spurr, J.E. 90 Antelope Range, east side. White Pine County, Nevada. 1899. Plate 4-B in US Geological Survey Bulletin 208. 1903. Panorama with sje00089. #1:/Nevada-Bulletin 208/sje00091 ID. Spurr, J.E. 91 North end of Schell Creek Range, from Antelope Range. Showing the Tertiary and Pleistocene valleys between the two ranges. White Pine County, Nevada. 1899. Plate 3 in US Geological Survey Bulletin 208. 1903. #1:/Nevada-Bulletin 208/sje00097 ID. Spurr, J.E. 97 Rhyolite walls of Meadow Valley Canyon at Carson's Ranch. Lincoln County, Nevada. 1899. Plate 6-A in US Geological Survey Bulletin 208. 1903. #1:/Nevada-Bulletin 208/sje00098 ID. Spurr, J.E. 98 Plicocene conglomerate in Meadow Valley Canyon at Cane Spring, Lincoln County, Nevada. 1899. Plate 6-B in US Geological Survey Bulletin 208. 1903. 208 #1:/Idaho-Bulletin 199/sht00242 ID. Stearns, H.T. 242 Volcanic bombs, Cinder Buttes, About 1/3 natural size Blaine County, Idaho. 1901 Plate 12 in US Geological Survey Bulletin 199. 1902. #1:/Idaho-Bulletin 170/topa0116 ID. Topography A 116 USGS Transit Station on random line on Idaho-Montana Boundary line showing difficult work Montana-Idaho. 1900. Plate 6 in US Geological Survey Bulletin 170. 1900. #1:/Texas-Bulletin 164/vtw00102 ID. Vaughan, T.W. 102 Artesian well, Dinman's. near Carrizo Springs, Dimmit County, Texas. Circa 1896. Plate 4B in US Geological Survey Bulletin 164. 1900. #1:/Texas-Bulletin 164/vtw00104 ID. Vaughan, T.W. 104 Lower Eocene sandstone, Myrick"s Apiary, Frio River, southern Uvalde County, Texas. Circa 1896. Plate 4A in US Geological Survey Bulletin 164. 1900. #1:/Texas-Bulletin 164/vtw00105 ID. Vaughan, T.W. 105 Cretaceous-Eocene contact on the Frio River, 2 miles below Engelmann's Ranch, southern. The sandstone at the floor at the base of the bluff is Cretaceous; the middle and upper portions of the bluff are Eocene. Uvalde County, Texas Circa 1896. Plate 3A in US Geological Survey Bulletin 164. 1900. #1:/Texas-Bulletin 164/vtw00107 ID. Vaughan, T.W. 107 Basal Eocene; Portion of same bluff, but farther downstream. Uvalde County, Texas. Circa 1896. Plate 3B in US Geological Survey Bulletin 164. 1900. #1:/California-Bulletin 227/h2op0028 ID. Water Supply Paper, 28 Typical weir, Los Angeles River, Los Angeles County, California. 1904. Plate 8-B in US Geological Survey Bulletin 227. 1904. Plate 2-A in U.S. Geological Survey. Water- supply paper 56. 1901. #1:/Alaska-Bulletin 236/wcw00001 ID. Wright, C.W. 1 Claim No. 1, above Discovery. Skagway district, Southeastern Alaska region, Alaska. 1903. Plate 8-A in US Geological Survey Bulletin 236. 1904. #1:/Alaska-Bulletin 236/wcw00002 ID. Wright, C.W. 2 Porcupine Creek at No, 1 claim above Discovery claim. Skagway district, Southeastern Alaska region, Alaska. 1903. Plate 4-A in US Geological Survey Bulletin 236. 1904. #1:/Alaska-Bulletin 236/wcw00003 ID. Wright, C.W. 3 High bench deposit on Finley Claim. Skagway district, Southeastern Alaska region, Alaska. 1903. Plate 8-B in US Geological Survey Bulletin 236. 1904. #1:/Alaska-Bulletin 236/wcw00004 ID. Wright, C.W. 4 Hydraulicking bench deposit on Woodin claim. Skagway district, Southeastern Alaska region, Alaska. 1903. Plate 8-B in US Geological Survey Bulletin 236. 1904. #1:/Alaska-Bulletin 236/wcw00006 ID. Wright, C.W. 6 Head of Porcupine Creek, looking south. Seated man was deliberately obscured in the published photograph. Skagway district, Southeastern Alaska region, Alaska. 1903. Plate 4-B in US Geological Survey Bulletin 236. 1904. #1:/Pennsylvania-Bulletin 249/butc0039 ID. Butts, C. 39 Loyalhanna limestone resting on sandstone of the Pocono formation Allegripus, Blair County, Pennsylvania. 1904. Plate 7-A in US. Geological Survey. Bulletin 249. 1905. #1:/Pennsylvania-Bulletin 249/butc0046 ID. Butts, C. 46 Weathered surface of the Loyalhanna limestone at the "viaduct" 1 mile east of Mineral Point. Cambria County, Pennsylvania. 1904. Plate 7-B in US. Geological Survey. Bulletin 249. 1905. #1:/Pennsylvania-Bulletin 249/cmr00132 ID. Campbell, M.R. 132 Vanport limestone limestone in quarry of Kittanning Clay Manufacturing Company, Kittanning, Armstrong County, Pennsylvania. 1904. Plate 4-A in US. Geological Survey. Bulletin 249. 1905. #1:/Pennsylvania-Bulletin 249/cmr00142 ID. Campbell, M.R. 142 Vanport limestone in quarry of Kittanning Clay Manufacturing Company, Kittanning, Armstrong County, Pennsylvania. 1904. Plate 3 in US. Geological Survey. Bulletin 249. 1905. #1:/Pennsylvania-Bulletin 249/cmr00171 ID. Campbell, M.R. 171 Vanport limestone quarries at Newcastle, Lawrence County, Pennsylvania. 1904. Plate 6 in US. Geological Survey. Bulletin 249. 1905. #1:/Alaska-Bulletin 247/caj00267 ID. Collier, A.J. 267 Roppy surface of recent lava flow between the forks of Kuzitrin River. Fairhaven District, Seward Peninsula Region, Alaska. 1903. Plate 6-B in US Geological Survey Bulletin 247. 1905. #1:/Alaska-Bulletin 247/caj00269 ID. Collier, A.J. 269 Fissure in recent lavas between the forks of Kuzitrin River, caused by the sinking of the hardened surface after the molten lava below had flowed out from either side. Fairhaven District, Seward Peninsula Region, Alaska. 1903. Plate 7-A in US Geological Survey Bulletin 247. 1905. #1:/Alaska-Bulletin 247/caj00270 ID. Collier, A.J. 270 Recent lava flow between the forks of the Kuzitrin River. Fairhaven District, Seward Peninsula Region, Alaska. 1903. Plate 7-B in US Geological Survey Bulletin 247. 1905. #1:/Alaska-Bulletin 250/mgc00002 ID. Martin, G.C. 2 Landward face of Tilted Hills, Chinitna bay; Enochkin formation overlain by Naknek formation. Kenai Peninsula County, Alaska. 1903. Plate 5 in US. Geological Survey. Bulletin 250. 1905. #1:/Montana-Bulletin 237/miscel05 ID. Miscellaneous 5 East end of Shonkin laccolith, Highwood Mountains. Photo by L.V. Pirsson. Chouteau County, Montana. 1894. Plate 5-B in US. Geological Survey. Bulletin 249. 1905. #1:/Pennsylvania-Bulletin 256/srw00020 ID. Stone, R.W. 20 Crooked Creek at Girty, Armstrong County, Pennsylvania. 1904. Plate 3-A in US. Geological Survey. Bulletin 256. 1905. #1:/Pennsylvania-Bulletin 256/srw00021 ID. Stone, R.W. 21 Stoneware made form Kittanning clay at Girty, Armstrong County, Pennsylvania. 1904. Plate 12-B in US. Geological Survey. Bulletin 256. 1905. #1:/Pennsylvania-Bulletin 256/srw00028 ID. Stone, R.W. 28 Typical coal bank on Fagley Run. Armstrong County, Pennsylvania. 1904. Plate 6-A in US. Geological Survey. Bulletin 256. 1905. #1:/Pennsylvania-Bulletin 256/srw00030 ID. Stone, R.W. 30 Conemaugh formation topography, Rockville Armstrong County, Pennsylvania. 1904. Plate 2-B in US. Geological Survey. Bulletin 256. 1905. #1:/Pennsylvania-Bulletin 256/srw00031 ID. Stone, R.W. 31 Yard (natural) gas torch. Armstrong County, Pennsylvania. 1904. Plate 12-A in US. Geological Survey. Bulletin 256. 1905. #1:/Pennsylvania-Bulletin 256/srw00033 ID. Stone, R.W. 33 Entrance to Bowman Coal Company's mine, near Edri. Indiana County, Pennsylvania. 1904. Plate 7-B in US. Geological Survey. Bulletin 256. 1905. #1:/Pennsylvania-Bulletin 256/srw00034 ID. Stone, R.W. 34 Avonmore mine. Hicksville, Armstrong County, Pennsylvania. 1904. Plate 7-A in US. Geological Survey. Bulletin 256. 1905. #1:/Pennsylvania-Bulletin 256/srw00040 ID. Stone, R.W. 40 Pittsburg Gas Coal Company's heading No. Harper's Run. Indiana County, Pennsylvania. 1904. Plate 4-B in US. Geological Survey. Bulletin 256. 1905. #1:/Pennsylvania-Bulletin 256/srw00041 ID. Stone, R.W. 41 Mahoning sandstone near schoolhouse, Jacksonville. Indiana County, Pennsylvania. 1904. Plate 3-B in US. Geological Survey. Bulletin 256. 1905. #1:/Montana-Bulletin 237/wwh00011 ID. Weed, W.H. 11 Sketch of pulaskose (syenite) resting on Shoninose southwest side of Square Butte. Chouteau County, Montana. 1894. Plate 5-A in US. Geological Survey. Bulletin 249. 1905. #1:/Pennsylvania-Bulletin 279/cmr00143 ID. Campbell, M.R. 143 Kittanning Clay Manufacturing Company's works at Kittanning. Armstrong County, Pennsylvania. 1903. Plate 10-A in U.S. Geological Survey. Bulletin 279. 1906. #1:/Alaska-Bulletin 278/caj00453 ID. Collier, A.J. 453 Whaling station at Jabbertown, on point Hope Peninsula. Northern Alaska region, Alaska 1904. Plate 3-B in U.S. Geological Survey. Bulletin 278. 1906. #1:/Alaska-Bulletin 278/caj00458 ID. Collier, A.J. 458 Outcrops of brecciated cherty limestone on north slope of mountain at Cape Lisburne. Northern Alaska region, Alaska 1904. Plate 3-B in U.S. Geological Survey. Bulletin 278. 1906. #1:/Alaska-Bulletin 278/caj00471 ID. Collier, A.J. 471 Folded beds and thrust fault in the upper member of the Mesozoic series 5 miles east of Cape Lisburne. Northern Alaska region, Alaska 1904. Plate 4-B in U.S. Geological Survey. Bulletin 278. 1906. #1:/Alaska-Bulletin 278/caj00473 ID. Collier, A.J. 473 Cliffs west of Corwin Bluff, Corwin mines are in the foreground. Northern Alaska region, Alaska 1904. Plate 2-B in U.S. Geological Survey. Bulletin 278. 1906. #1:/Vermont-Bulletin 275/dtn00072 ID. Dale, T.N. 72 Slate syncline at West Pawlet, Rising and Nelson's sea-green slate quarry No. 2, seen looking north, showing an eroded inclined syncline. The discoloration of the dip-joint face below is due to ferruginous water exuding at the bed plane; depth about 100 feet. Rutland County, Vermont. 1900. Plate 25 in U.S. Geological Survey. Bulletin 275. 1906. #1:/Vermont-Bulletin 275/dtn00081 ID. Dale, T.N. 81 Syncline of black and gray banded slate at West Castleton, showing the effect of erosion upon the more calcareous beds. Cleavage dips 30 degrees to right or east. Rutland County, Vermont. 1900. Plate 3 in U.S. Geological Survey. Bulletin 275. 1906. #1:/Vermont-Bulletin 275/dtn00082 ID. Dale, T.N. 82 Syncline of black and gray banded slate at West Castleton, showing the effect of erosion upon the more calcareous beds. Cleavage dips 30 degrees to right or east. Rutland County, Vermont. 1900. Plate 3 in U.S. Geological Survey. Bulletin 275. 1906. #1:/Vermont-Bulletin 275/dtn00086 ID. Dale, T.N. 86 Quartzite beds in overturned folds of slate, area (is 3.5 by 4.5 feet) of joint face of slate syncline in photos 81 and 82 showing 4 small beds of quartzite in overturned folds with axes dipping in the direction of the cleavage. At left is a quartz vein in the cleavage; scale 4 inches Rutland County, Vermont. 1900. Plate 5-A in U.S. Geological Survey. Bulletin 275. 1906. #1:/Vermont-Bulletin 275/dtn00096 ID. Dale, T.N. 96 Cleavage banding; shales partly altered to schist in Rupert, Vermont near Hebron, New York, line showing bands of fine cleft rock alternating with bands of uncleft rock, dipping 80 degrees across the bedding foliation which is visible at several points and dips at a low angle. The cleavage is slip cleavage. Lower block in foreground has three uncleft and two cleft bands. Sledge handle is 30 inches long. Bennington County, Vermont. 1900. Plate 11-B in U.S. Geological Survey. Bulletin 275. 1906. #1:/New York-Bulletin 275/dtn00101 ID. Dale, T.N. 101 Quartz veins in slate; quartz vein of segregation crossing the cleavage of greenish slate at Jamesville. Sledge handle is 30 inches long. Onondaga County, New York. 1900. Plate 5-B in U.S. Geological Survey. Bulletin 275. 1906. Plate 5-A in U.S. Geological Survey. Bulletin 586. 1914. Plate 6 in U.S. Geological Survey. Bulletin 1109. 1960. #1:/Vermont-Bulletin 275/dtn00106 ID. Dale, T.N. 106 Bed of sandstone resting on slate; horizontal bed of sandstone with calcareous concretions having their longer axes parallel to the bedding overlying greenish slate with cleavage dipping 20 degrees and joints 45 degrees. An irregular cleavage continues in the sandstone. One foot of sledge is in the sight. Eddy Hill, Fair Haven, Rutland County, Vermont. 1900. Plate 2-B in U.S. Geological Survey. Bulletin 275. 1906. #1:/New York-Bulletin 275/dtn00112 ID. Dale, T.N. 112 Red slate with bed of limestone and green slate; block of reddish slate from 1.5 miles south of Hatch Hill, Whitehall, with bed of limestone bordered by green and purple slate, making a "ribbon," an inch in vertical thickness, crossing the cleavage diagonally scale on rule is 4 inches long. Washington County, New York. 1900. Plate 2-A in U.S. Geological Survey. Bulletin 275. 1906. #1:/Pennsylvania-Bulletin 275/dtn00160 ID. Dale, T.N. 160 Eureka slate quarry near Slatington, north part seen looking east, showing an eroded northward-inclined close syncline crossed by cleavage and curved joints, and overlain by glacial deposits. The cleavage with the syncline appears to be curved also. Lehigh County, Pennsylvania. 1900. Plate 18 in U.S. Geological Survey. Bulletin 275. 1906. #1:/Pennsylvania-Bulletin 275/dtn00161 ID. Dale, T.N. 161 Blue Mountain slate quarry near Slatington, seen looking east, showing the character of the syncline and the bending over southward of the cleavage at the surface, probably due to the friction and weight of the glacier. Lehigh County, Pennsylvania. 1900. Plate 17 in U.S. Geological Survey. Bulletin 275. 1906. #1:/Pennsylvania-Bulletin 275/dtn00163 ID. Dale, T.N. 163 Slate quarry near Slatington, seen looking west, showing workmen engaged in clearing a "ribboned" slate from the surface of thick workable bed. Lehigh County, Pennsylvania. 1900. Plate 19 in U.S. Geological Survey. Bulletin 275. 1906. #1:/Maine-Bulletin 275/dtn00175 ID. Dale, T.N. 175 The Merrill Slate quarry at Brownville, seen looking S 60 degrees W. The end wall, working face, has 42 beds of slate alternating with as many of quartzite, some of which are visible in the photograph. The left wall consists of a quartzite bed with diagonal jointing. Piscataquis County, Maine. 1900. Plate 12 in U.S. Geological Survey. Bulletin 275. 1906. #1:/Montana-Bulletin 257/stw00034 ID. Stanton, T.W. 34 Upper part of Judith River beds and overlying Bearpaw shales on south side of Milk River 3 miles west of Havre, Hill County, Montana. 1903. Plate 8-B in U.S. Geological Survey. Bulletin 257. 1905. #1:/Montana-Bulletin 257/stw00035 ID. Stanton, T.W. 35 Claggett shales and base of Judith River beds on Milk River half mile below Pendant D'oreille. Assiniboia Hill County, Montana. 1903. Plate 9-B in U.S. Geological Survey. Bulletin 257. 1905. #1:/Montana-Bulletin 257/stw00051 ID. Stanton, T.W. 51 Eagle Formation. "StoneWalls" on Missouri River below mouth of Eagle Creek. Chouteau County, Montana. 1903. Plate 1-A in U.S. Geological Survey. Bulletin 257. 1905. #1:/Montana-Bulletin 257/stw00052 ID. Stanton, T.W. 52 Eagle Formation. Sandstone and overlying lignite-bearing beds at mouth of Eagle Creek. Chouteau County, Montana. 1903. Plate 1-B in U.S. Geological Survey. Bulletin 257. 1905. #1:/Montana-Bulletin 257/stw00053 ID. Stanton, T.W. 53 Broken anticline of Eagle Sandstone on north side of Missouri River one mile below mouth of Birch Creek near Judith. Judith River beds from the more distant cliffs on right. Chouteau County, Montana. 1903. Plate 3-B in U.S. Geological Survey. Bulletin 257. 1905. #1:/Montana-Bulletin 257/stw00056 ID. Stanton, T.W. 56 Birch Creek Canyon from top of bluffs near mouth. Looking toward Bearpaw Mountains. Shows full thickness of Judith River beds and top of Claggett Formation. Blaine County, Montana. 1903. Plate 3-A in U.S. Geological Survey. Bulletin 257. 1905 #1:/Montana-Bulletin 257/stw00063 ID. Stanton, T.W. 63 Judith River beds on Fish Creek, near Musselshell River. Musselshell County, Montana. 1903. Plate 11-B in U.S. Geological Survey. Bulletin 257. 1905 #1:/Montana-Bulletin 257/stw00112 ID. Stanton, T.W. 112 Badlands exposures of Judith River beds on north side of Milk River near Havre, Hill County, Montana. 1903. Plate 8-A in U.S. Geological Survey. Bulletin 257. 1905. #1:/Montana-Bulletin 257/stw00116 ID. Stanton, T.W. 116 Upturned Judith River beds and base of Bearpaw shales on Meili Coulee near Havre. Hill County, Montana. 1903. Plate 9-A in U.S. Geological Survey. Bulletin 257. 1905. #1:/Montana-Bulletin 257/stw00118 ID. Stanton, T.W. 118 Contact between Judith River beds and overlying Bearpaw shales on Sage Creek Assiniboia, Hill County, Montana. 1903. Plate 10-B in U.S. Geological Survey. Bulletin 257. 1905. #1:/Montana-Bulletin 257/stw00121 ID. Stanton, T.W. 121 Exposure of Judith River beds on Sage Creek Assiniboia, showing means of Trachodon skeleton. Hill County, Montana. 1903. Plate 10-A in U.S. Geological Survey. Bulletin 257. 1905. #1:/Montana-Bulletin 257/stw00124 ID. Stanton, T.W. 124 Undisturbed Judith River beds with overlying Bearpaw Shales on Cow Creek. Blaine County, Montana. 1903. Plate 6-A in U.S. Geological Survey. Bulletin 257. 1905. #1:/Montana-Bulletin 257/stw00125 ID. Stanton, T.W. 125 Upper part of Judith River beds with heavy bed of lignite on Cow Creek. Blaine County, Montana. 1903. Plate 7-B in U.S. Geological Survey. Bulletin 257. 1905. #1:/Montana-Bulletin 257/stw00126 ID. Stanton, T.W. 126 Fault contact of Judith River beds with Bearpaw Shales on Cow Creek ten miles above mouth. Blaine County, Montana. 1903. Plate 6-B in U.S. Geological Survey. Bulletin 257. 1905. #1:/Montana-Bulletin 257/stw00130 ID. Stanton, T.W. 130 Indurated or concretionary mass in upper part of Judith River beds on Cow Creek 13 miles above mouth. Blaine County, Montana. 1903. Plate 7-A in U.S. Geological Survey. Bulletin 257. 1905. #1:/Montana-Bulletin 257/stw00134 ID. Stanton, T.W. 134 Cliff of Upper Eagle Sandstone near the mouth of Dog Creek. Very fossiliferous Fergus County, Montana. 1903. Plate 2 in U.S. Geological Survey. Bulletin 257. 1905. #1:/Montana-Bulletin 257/stw001388 ID. Stanton, T.W. 138 Claggett Formation and overlying Judith River beds on Birch Creek. near mouth. Chouteau County, Montana. 1903. Plate 4-B in U.S. Geological Survey. Bulletin 257. 1905. #1:/Montana-Bulletin 257/stw00145 ID. Stanton, T.W. 145 Missouri River below mouth of Birch Creek. Looking downstream. Fergus and Chouteau Counties, Montana. 1903. Plate 4-A in U.S. Geological Survey. Bulletin 257. 1905. #1:/Mississippi-Bulletin 283/caf00004 ID. Crider, A.F. 4 Selma chalk bluff, Macon, Noxubee County, Mississippi. 1903. Plate 3-A in U.S. Geological Survey. Bulletin 283. 1906. #1:/Mississippi-Bulletin 283/caf00006 ID. Crider, A.F. 6 Bed of glass sand on Pearl River near Byram, Hinds County, Mississippi. 1903. Plate 4- A in U.S. Geological Survey. Bulletin 283. 1906. #1:/Mississippi-Bulletin 283/caf00007 ID. Crider, A.F. 7 Outcrop of Vicksburg limestone at rock cut 1 mile west of Clinton, Hinds County, Mississippi. 1903. Plate 2-A in U.S. Geological Survey. Bulletin 283. 1906. #1:/Massachusetts-Bulletin 272/dtn00005 ID. Dale, T.N. 5 The "Hopper" in the Greylock mass, from Deer Hill, looking across the strike, on the left, Mount Prospect, on the right, in distance, Mount Greylock, in front of it Bald Mountain or "Stony ledge", a ravine of erosion. Berkshire County, Massachusetts. 1900. Plate 11 in U.S. Geological Survey. Bulletin 272. 1905. #1:/Vermont-Bulletin 272/dtn00037 ID. Dale, T.N. 37 Falls of the Poesten Kill, near Barberville, on the western edge of the plateau, the stream is cutting the limb of an anticline of grit and shale. Rensselaer County, New York. 1900. Plate 9-A in U.S. Geological Survey. Bulletin 272. 1905. #1:/Vermont-Bulletin 272/dtn00050 ID. Dale, T.N. 50 The Vermont valley, illustrating the erosion of both the schist range and quartzite range, looking N. 30 degrees E. down Lye Brook Hollow from "the Burning" on the Green Mountain range, 3.12 miles south-southeast of Manchester, with the Green Mountain Range on the right and the Taconic Range on the left. The nearer mass is Green Peak, the distant one is Dorset Mountain, in foreground, shattered ledge of Cambrian quartzite, the large block at left being about 4 by 15 feet in size. Bennington County, Vermont. 1900. Plate 4 in U.S. Geological Survey. Bulletin 272. 1905. #1:/Vermont-Bulletin 272/dtn00051 ID. Dale, T.N. 51 The Vermont valley, illustrating the erosion of both the schist range and quartzite range, looking N. 30 degrees E. down Lye Brook Hollow from "the Burning" on the Green Mountain range, 3.12 miles south-southeast of Manchester, with the Green Mountain Range on the right and the Taconic Range on the left. The nearer mass is Green Peak, the distant one is Dorset Mountain, in foreground, shattered ledge of Cambrian quartzite, the large block at left being about 4 by 15 feet in size. Bennington County, Vermont. 1900. Plate 4 in U.S. Geological Survey. Bulletin 272. 1905. #1:/Vermont-Bulletin 272/dtn00129 ID. Dale, T.N. 129 Glacial boulder of quartzite resting on marble, west foot of Taconic Range, 1.75 miles southwest of Pittsford village, looking south. Rutland County, Vermont. 1900. Plate 8-A in U.S. Geological Survey. Bulletin 272. 1905. #1:/Vermont-Bulletin 272/dtn00137 ID. Dale, T.N. 137 Glacial furrow in white marble, 2 miles west-northwest of Pittsford; the marble is in close, erect folds N. 20 degrees W. The course of the furrow is S. 20 degrees E. On the marble are 20 feet of clays probably deposited by a glacial lake. Rutland County, Vermont. 1900. Plate 8-B in U.S. Geological Survey. Bulletin 272. 1905. #1:/Vermont-Bulletin 272/dtn00139 ID. Dale, T.N. 139 "The Gorge" in Pittsford, near the Chittenden line, taking looking N. 20 degrees E., the cut is in quartzite and is attributed to a fault. Rutland County, Vermont. 1900. Plate 9-B in U.S. Geological Survey. Bulletin 272. 1905. #1:/Massachusetts-Bulletin 272/dtn00148 ID. Dale, T.N. 148 The offset in the Green Mountain range, from Williamstown, looking east, in the upper half of the mass the lines dipping gently to the south are the sides of pitching folds of quartzite, which pass under the limestone valley. The horizontal bench is a glacial lake terrace resting on a moraine. Berkshire County, Massachusetts.1900. Plate 6-A in U.S. Geological Survey. Bulletin 272. 1905. #1:/Vermont-Bulletin 272/dtn0157a ID. Dale, T.N. 157a White rocks on the Green Mountain range in Wallingford; looking south along the strike, the rock is quartzite. Rutland County, Vermont. 1900. Plate 12-A in U.S. Geological Survey. Bulletin 272. 1905. #1:/Alaska-Bulletin 280/hfl00136 ID. Hess, F.L. 136 Automatic dump gate discharging claim no. 1 below Little Minook creek. Rampart district, Yukon region, Alaska. August 29, 1904. Plate 5-A in U.S. Geological Survey. Bulletin 280. 1906. #1:/Alaska-Bulletin 280/hfl00139 ID. Hess, F.L. 139 Westward from Idaho Bar down Little Minook creek, showing portion of high bench and intermediate bench. Rampart district, Yukon region, Alaska. August 29, 1904. Plate 4-A in U.S. Geological Survey. Bulletin 280. 1906. #1:/Alaska-Bulletin 280/hfl00140 ID. Hess, F.L. 140 Gravel of high bench of Minook creek exposed in tunnel on Idaho Bar. Rampart district, Yukon region, Alaska. August 30, 1904. Plate 4-B in U.S. Geological Survey. Bulletin 280. 1906. #1:/Alaska-Bulletin 280/hfl00141 ID. Hess, F.L. 141 Hydraulicking on Hunter creek about 4 miles above the month; the ground ice is shown by the darker places in the bank on the left. The boulders have come from the high bench of Minook creek, through which Hunter creek cuts. Rampart district, Yukon region, Alaska. August 30, 1904. Plate 5-B in U.S. Geological Survey. Bulletin 280. 1906. #1:/Alaska-Bulletin 277/stw00161 ID. Stanton, T.W. 161 Outcrop of Cooper seam, the left foot of the man is at the floor of the seam; his right hand indicates the main parting; the head of the pick touches the roof. Kachemak bay. Seldovia district, Cook Inlet region, Alaska. 1904. Plate 16-B in U.S. Geological Survey. Bulletin 277. 1906. #1:/Alaska-Bulletin 277/stw00162 ID. Stanton, T.W. 162 Site of Cook Inlet Coal Fields Company's tunnels near the mine camp: Kachemak bay. Seldovia district, Cook Inlet region, Alaska. 1904. Plate 15-A in U.S. Geological Survey. Bulletin 277. 1906. #1:/Alaska-Bulletin 277/srw00050 ID. Stone, R.W. 50 Carloads of lignite at Homer after three year' exposure to the weather. Seldovia district, Cook Inlet region, Alaska. 1904. Plate 16-A in U.S. Geological Survey. Bulletin 277. 1906. #1:/Alaska-Bulletin 277/srw00053 ID. Stone, R.W. 53 Kenai formation near Bluff Point, the dark band in the bluff is a bed of coal. Seldovia district, Cook Inlet region, Alaska. 1904. Plate 15-B in U.S. Geological Survey. Bulletin 277. 1906. #1:/Alaska-Bulletin 277/srw00054 ID. Stone, R.W. 54 Outcrop of lignite seam in McNeil creek Kachemak bay. Seldovia district, Cook Inlet region, Alaska. 1904. Plate 18-B in U.S. Geological Survey. Bulletin 277. 1906. #1:/Alaska-Bulletin 277/srw00056 ID. Stone, R.W. 56 Outcrop of Curtis seam, ruins of wharf and bunker. Kachemak bay. Seldovia district, Cook Inlet region, Alaska. 1904. Plate 17-A in U.S. Geological Survey. Bulletin 277. 1906. #1:/Alaska-Bulletin 277/srw00059 ID. Stone, R.W. 59 Cascades over lignite seams in sea bluff. Kachemak bay. Seldovia district, Cook Inlet region, Alaska. 1904. Plate 17-B in U.S. Geological Survey. Bulletin 277. 1906. #1:/Alaska-Bulletin 277/srw00063 ID. Stone, R.W. 63 Kenai formation at the mouth of Falls creek. Kachemak bay. Seldovia district, Cook Inlet region, Alaska. 1904. Plate 18-A in U.S. Geological Survey. Bulletin 277. 1906. #1:/Alaska-Bulletin 263/pai00189 ID. Paige, S. 189 Last Claim mine, typical south coast topography, Gold Creek. Juneau district, Southeastern Alaska region, Alaska. June 1904. Plate 18-B in U.S. Geological Survey. Bulletin 263. 1905 #1:/ Canada-Bulletin 263/pai00230 ID. Paige, S. 230 Road in Atlin district, British Columbia, Canada. June 1904. Plate 38-B in U.S. Geological Survey. Bulletin 263. 1905. #1:/ Canada-Bulletin 263/pai00241 ID. Paige, S. 241 Cocoa matting and expanded metal riffle. Yukon Territory, Canada. June 1904. Plate 12- B in U.S. Geological Survey. Bulletin 263. 1905. #1:/Canada-Bulletin 263/pai00242 ID. Paige, S. 242 Trommel and gold saving tables, New Zealand type, Bonanza Creek. Klondike. Yukon Territory, Canada. June 1904. Plate 29-A in U.S. Geological Survey. Bulletin 263. 1905. #1:/Canada-Bulletin 263/pai00243 ID. Paige, S. 243 Adit to drifting operations, Coffey hydraulic property, Klondike. Yukon Territory, Canada. June 1904. Plate 13-A in U.S. Geological Survey. Bulletin 263. 1905. #1:/Canada-Bulletin 263/pai00245 ID. Paige, S. 245 Adit to drifting operations, Coffey hydraulic property, Klondike. Yukon Territory, Canada. June 1904. Plate 13-A in U.S. Geological Survey. Bulletin 263. 1905. #1:/Canada-Bulletin 263/pai00247 ID. Paige, S. 247 Hydraulic pit, Klondike benches. Yukon Territory, Canada. June 1904. Plate 23-B in U.S. Geological Survey. Bulletin 263. 1905. #1:/Alaska-Bulletin 263/pai00266 ID. Paige, S. 266 Method of staying-pressure box, Silver Bow basin. Juneau district, Southeastern Alaska region, Alaska. June 1904. Plate 17-B in U.S. Geological Survey. Bulletin 263. 1905. #1:/Alaska-Bulletin 263/pai00271 ID. Paige, S. 271 Pressure box in Treadwell ditch. Douglas Island, Juneau district, Southeastern Alaska region, Alaska. 1904. Plate 17-A in U.S. Geological Survey. Bulletin 263. 1905. #1:/Alaska-Bulletin 263/pai00278 ID. Paige, S. 278 Treadwell ditch line at Lawson Creek, Douglas Island, Juneau district, Southeastern Alaska region, Alaska. 1904. Plate 16-B in U.S. Geological Survey. Bulletin 263. 1905. #1:/Canada-Bulletin 263/pai00286 ID. Paige, S. 286 Single lift dredge, 40-foot ground at Atlin, coarse gold. British Columbia, Canada. June 1904. Plate 28-A in U.S. Geological Survey. Bulletin 263. 1905. #1:/Canada-Bulletin 263/pai00287 ID. Paige, S. 287 Buckets, Atlin dredge. British Columbia, Canada. June 1904. Plate 28-B in U.S. Geological Survey. Bulletin 263. 1905. #1:/Canada-Bulletin 263/pai00288 ID. Paige, S. 288 Oroville riffles used at Atlin, British Columbia, Canada. June 1904. Plate 37-B in U.S. Geological Survey. Bulletin 263. 1905. #1:/Canada-Bulletin 263/pai00305 ID. Paige, S. 305 Thawing ahead of shovel, Eldorado Creek. Klondike. Yukon Territory, Canada. June 1904. Plate 13-B in U.S. Geological Survey. Bulletin 263. 1905. #1:/Canada-Bulletin 263/pai00308 ID. Paige, S. 308 Small storage dam, Bonanza Creek, Klondike. Yukon Territory, Canada. June 1904. Plate 21-B in U.S. Geological Survey. Bulletin 263. 1905. #1:/Canada-Bulletin 263/pai00312 ID. Paige, S. 312 Mud box on Gold Run, Klondike. Yukon Territory, Canada. June 1904. Plate 37-A in U.S. Geological Survey. Bulletin 263. 1905. #1:/Canada-Bulletin 263/pai00315 ID. Paige, S. 315 Dumping to sluices, Klondike. Yukon Territory, Canada. June 1904. Plate 6- B in U.S. Geological Survey. Bulletin 263. 1905. #1:/Canada-Bulletin 263/pai00330 ID. Paige, S. 330 New Zealand dredge, Bonanza Creek, Yukon Territory, Canada. June 1904. Plate 29-B in U.S. Geological Survey. Bulletin 263. 1905. #1:/Canada-Bulletin 263/pai00332 ID. Paige, S. 332 Blocks of frozen gravel in hydraulic pit, Klondike. Yukon Territory, Canada. June 1904. Plate 24-B in U.S. Geological Survey. Bulletin 263. 1905. #1:/Canada-Bulletin 263/pai00334 ID. Paige, S. 334 Old drift timbers (middle ground) in hydraulic pit, Klondike. Yukon Territory, Canada. June 1904. Plate 14-A in U.S. Geological Survey. Bulletin 263. 1905. #1:/Canada-Bulletin 263/pai00339 ID. Paige, S. 339 Application of steam point in open-cut works, N.C. Company, Hunker, Yukon Territory, Canada. June 1904. Plate 14-B in U.S. Geological Survey. Bulletin 263. 1905. #1:/Canada-Bulletin 263/pai00341 ID. Paige, S. 341 China pump, Hunker, Yukon Territory, Canada. June 1904. Plate 4- B in U.S. Geological Survey. Bulletin 263. 1905. #1:/Canada-Bulletin 263/pai00354 ID. Paige, S. 354 Steam shovel, Bear Creek, Klondike, Yukon Territory, Canada. June 1904. Plate 11- B in U.S. Geological Survey. Bulletin 263. 1905. #1:/Canada-Bulletin 263/pai00355 ID. Paige, S. 355 Stationary washing plant, Klondike Yukon Territory, Canada. June 1904. Plate 12- A in U.S. Geological Survey. Bulletin 263. 1905. #1:/Alaska-Bulletin 263/pai00357 ID. Paige, S. 357 Trestled flume in Eagle district, Yukon region, Alaska. July 1904. Plate 41-B in U.S. Geological Survey. Bulletin 263. 1905. #1:/Alaska-Bulletin 263/pai00363 ID. Paige, S. 363 Dam for booming, American Creek. Eagle district, Yukon region, Alaska. July 1904. Plate 5-B in U.S. Geological Survey. Bulletin 263. 1905. #1:/Alaska-Bulletin 263/pai00364 ID. Paige, S. 364 Set-up boxes for shoveling-in, American Creek, Eagle district, Yukon region, Alaska. July 1904. Plate 4-A in U.S. Geological Survey. Bulletin 263. 1905. #1:/Canada-Bulletin 263/pai00365 ID. Paige, S. 365 John Rentfro, Yukon placer miner and cook. Eagle district, Yukon region, Alaska. July 1904. Plate 5-A in U.S. Geological Survey. Bulletin 263. 1905. #1:/Alaska-Bulletin 263/pai00370 ID. Paige, S. 370 Pack train, Birch creek, Circle district, Yukon region, Alaska. July 1904. Plate 41-A in U.S. Geological Survey. Bulletin 263. 1905. #1:/Alaska-Bulletin 263/pai00376 ID. Paige, S. 376 Harrington's work on Mastodon Creek, Circle district, Yukon region, Alaska. July 1904. Plate 19-A in U.S. Geological Survey. Bulletin 263. 1905. #1:/Alaska-Bulletin 263/pai00390 ID. Paige, S. 390 Mud box, used in string of boxes. Fairbanks district, Yukon region, Alaska. August 1904. Plate 36-B in U.S. Geological Survey. Bulletin 263. 1905. #1:/Alaska-Bulletin 263/pai00391 ID. Paige, S. 391 Drift mining on Fairbanks Creek. Fairbanks district, Yukon region, Alaska. August 1904. Plate 15-A in U.S. Geological Survey. Bulletin 263. 1905. #1:/Alaska-Bulletin 263/pai00397 ID. Paige, S. 397 Derricking at Fairbanks: dumping. Fairbanks district, Yukon region, Alaska. August 1904. Plate 7-A in U.S. Geological Survey. Bulletin 263. 1905. #1:/Alaska-Bulletin 263/pai00399 ID. Paige, S. 399 Derricking at Fairbanks: loading. Fairbanks district, Yukon region, Alaska. August 1904. Plate 7-B in U.S. Geological Survey. Bulletin 263. 1905. #1:/Alaska-Bulletin 263/pai00414 ID. Paige, S. 414 Road in Fairbanks district, Yukon region, Alaska. August 1904. Plate 38-A in U.S. Geological Survey. Bulletin 263. 1905. #1:/Alaska-Bulletin 263/pai00426 ID. Paige, S. 426 Miocene Ditch, Glacier Creek. Seward Peninsula region, Alaska. August 1904. Plate 20-A in U.S. Geological Survey. Bulletin 263. 1905. #1:/Alaska-Bulletin 263/pai00429 ID. Paige, S. 429 Hydraulic elevator. Seward Peninsula region, Alaska. August 1904. Plate 27-A in U.S. Geological Survey. Bulletin 263. 1905. #1:/Alaska-Bulletin 263/pai00434 ID. Paige, S. 434 Gravel in pit, Glacier Creek. Seward Peninsula region, Alaska. August 1904. Plate 26-B in U.S. Geological Survey. Bulletin 263. 1905. #1:/Alaska-Bulletin 263/pai00436 ID. Paige, S. 436 Hydraulic elevator in pit, Glacier Creek. Seward Peninsula region, Alaska. August 1904. Plate 26-A in U.S. Geological Survey. Bulletin 263. 1905. #1:/Alaska-Bulletin 263/pai00440 ID. Paige, S. 440 Steam shovel, Anvil Creek, Seward Peninsula region, Alaska. August 1904. Plate 11-A in U.S. Geological Survey. Bulletin 263. 1905. #1:/Alaska-Bulletin 263/pai00444 ID. Paige, S. 444 Settling pond, Anvil Creek. Seward Peninsula region, Alaska. August 1904. Plate 22-A in U.S. Geological Survey. Bulletin 263. 1905. #1:/Alaska-Bulletin 263/pai00458 ID. Paige, S. 458 Churn drill mounted on scow, Snake River, Seward Peninsula region, Alaska. August 1904. Plate 3-A in U.S. Geological Survey. Bulletin 263. 1905. #1:/Alaska-Bulletin 263/pai00460 ID. Paige, S. 460 Buckets, dredge at Council. Seward Peninsula region, Alaska. August 1904. Plate 30-B in U.S. Geological Survey. Bulletin 263. 1905. #1:/Alaska-Bulletin 263/pai00467 ID. Paige, S. 467 Flume of Hot Air Company, Ophir Creek, Ophir district, Yukon region, Alaska. September 1904. Plate 20-B in U.S. Geological Survey. Bulletin 263. 1905. #1:/Alaska-Bulletin 263/pai00472 ID. Paige, S. 472 Open-cut worked by tramming to bedrock sluices. Ophir district, Yukon region, Alaska. September 1904. Plate 27-B in U.S. Geological Survey. Bulletin 263. 1905. #1:/Alaska-Bulletin 263/pai00532 ID. Paige, S. 532 Pier for trestle Hot Air ditch on Ophir Creek. Ophir district, Yukon region, Alaska. September 1904. Plate 21-A in U.S. Geological Survey. Bulletin 263. 1905. #1:/Alaska-Bulletin 263/pai00542 ID. Paige, S. 542 Skids for derricking Ophir district, Yukon region, Alaska. September 1904. Plate 8-A in U.S. Geological Survey. Bulletin 263. 1905. #1:/Alaska-Bulletin 263/pai00549 ID. Paige, S. 549 Rough bed rocks and boulder piled in pit. Ophir district, Yukon region, Alaska. September 1904. Plate 9-B in U.S. Geological Survey. Bulletin 263. 1905. #1:/Alaska-Bulletin 263/pai00553 ID. Paige, S. 553 Derrick bucket, Seward Peninsula region, Alaska. August 1904. Plate 8-B in U.S. Geological Survey. 1905. #1:/Alaska-Bulletin 263/pai00566 ID. Paige, S. 566 Sluice below elevator, Ophir Creek. Ophir district, Yukon region, Alaska. September 1904. Plate 25-A in U.S. Geological Survey. Bulletin 263. 1905. #1:/California-Bulletin 263/pai00579 ID. Paige, S. 579 Digging ladder at low angle, Oroville, Butte County, California. October 1904. Plate 33- B in U.S. Geological Survey. Bulletin 263. 1905. #1:/California-Bulletin 263/pai00580 ID. Paige, S. 580 Digging on Spud. California. October 1904. Plate 31-A in U.S. Geological Survey. Bulletin 263. 1905. #1:/California-Bulletin 263/pai00581 ID. Paige, S. 581 Pilot house, upper deck, starboard side. California. October 1904. Plate 35-B in U.S. Geological Survey. Bulletin 263. 1905. #1:/California-Bulletin 263/pai00583 ID. Paige, S. 583 California No. 3 buckets, types of buckets for dredging. California. October 1904. Plate 32-A in U.S. Geological Survey. Bulletin 263. 1905. #1:/California-Bulletin 263/pai00587 ID. Paige, S. 587 Indiana [bucket], California. October 1904. Plate 32-C in U.S. Geological Survey. Bulletin 263. 1905. #1:/California-Bulletin 263/pai00589 ID. Paige, S. 589 Troughed belt stacker, Oroville, Butte County, California. October 1904. Plate 34-B in U.S. Geological Survey. Bulletin 263. 1905. #1:/California-Bulletin 263/pai00591 ID. Paige, S. 591 Practice in pond dredging, Oroville, Butte County, California. October 1904. Plate 35- A in U.S. Geological Survey. Bulletin 263. 1905. #1:/California-Bulletin 263/pai00593 ID. Paige, S. 593 Lava Beds No.2, California. October 1904. Plate 32-D in U.S. Geological Survey. Bulletin 263. 1905. #1:/California-Bulletin 263/pai00595 ID. Paige, S. 595 Uncompleted belt stacker, Oroville, Butte County, California. October 1904. Plate 34-A in U.S. Geological Survey. Bulletin 263. 1905. #1:/California-Bulletin 263/pai00596 ID. Paige, S. 596 Lower tumbler, California No. 3, Oroville. Butte County, California. October 1904. Plate 33-A in U.S. Geological Survey. Bulletin 263. 1905. #1:/California-Bulletin 263/pai00600 ID. Paige, S. 600 Stacker, New Zealand type of dredge, California No. 1. California. October 1904. Plate 31-B in U.S. Geological Survey. Bulletin 263. 1905. #1:/California-Bulletin 263/pai00602 ID. Paige, S. 602 Dredge of New Zealand type, Leggett No. 3, at Oroville. Butte County, California. October 1904. Plate 30-A in U.S. Geological Survey. Bulletin 263. 1905. #1:/California-Bulletin 263/pai00610 ID. Paige, S. 610 El Oro, types of buckets for dredging. California. October 1904. Plate 32-B in U.S. Geological Survey. Bulletin 263. 1905. #1:/California-Bulletin 308/bsh00046 ID. Ball, S.H. 46 Death Valley, showing sand dunes protected by desert shrubbery (mesquite and creosote bush). Inyo County, California. 1905. Plate 2-B in U.S. Geological Survey. Bulletin 308. 1907. #1:/California-Bulletin 308/bsh00050 ID. Ball, S.H. 50 Marble Canyon, Panamint Range, showing metamorphosed Pogonip limestone near quartz-monzonite batholith. Inyo County, California. 1905. Plate 3 in U.S. Geological Survey. Bulletin 308. 1907. #1:/Nevada-Bulletin 308/bsh00054 ID. Ball, S.H. 54 Pahute Mesa showing benches determined by resistant flows of basalt. Nye County, Nevada. 1905. Plate 2-A in U.S. Geological Survey. Bulletin 308. 1907. #1:/Pennsylvania-Bulletin 300/cfg00006 ID. Clapp, F.G. 6 Outcrop of lower Washington limestone on Smith run, Amwell township. Washington County, Pennsylvania. 1904. Plate 7-B in U.S. Geological Survey. Bulletin 300. 1907.. #1:/Pennsylvania-Bulletin 300/cfg00010 ID. Clapp, F.G. 10 Bluff of Waynesburg sandstone at Lone Pine on Little Tenmile creek. Washington County, Pennsylvania. 1904. Plate 8-B in U.S. Geological Survey. Bulletin 300. 1907.. #1:/Pennsylvania-Bulletin 300/cfg00013 ID. Clapp, F.G. 13 Present appearance of oil operations on Willetts farm, Washington field. Washington County, Pennsylvania. 1904. Plate 4-B in U.S. Geological Survey. Bulletin 300. 1907.. #1:/Pennsylvania-Bulletin 300/cfg00018 ID. Clapp, F.G. 18 Waterfall over Benwood Limestone, Union township. Adams County, Pennsylvania. 1904. Plate 7-A in U.S. Geological Survey. Bulletin 300. 1907.. #1:/Pennsylvania-Bulletin 300/cfg00027 ID. Clapp, F.G. 27 Outcrop of Pittsburg coal at base of Pittsburg sandstone in valley of Fishpot Run, East Bethlehem township. Washington County, Pennsylvania. 1904. Plate 8-A in U.S. Geological Survey. Bulletin 300. 1907. #1:/Pennsylvania-Bulletin 300/cfg00037 ID. Clapp, F.G. 37 Gantz well, at Washington, first well to produce oil from the Gantz sand. Washington County, Pennsylvania. 1904. Plate 4-A in U.S. Geological Survey. Bulletin 300. 1907.. #1:/Maine-Bulletin 313/dtn00178 ID. Dale, T.N. 178 Hurricane isle quarry, eastern end, showing the lower 60-foot sheet overlain by 20-foot sheet, and crossed by vertical east west and by diagonal joint. Knox County, Maine. Plate 4-A in U.S. Geological Survey. Bulletin 313. 1907. Plate 12-A in U.S. Geological Survey. Bulletin 738. 1923. #1:/Maine-Bulletin 313/dtn00179 ID. Dale, T.N. 179 East-west joint structure in granite on Heron Neck at south end of Green Island; looking south-southeast from Hurricane Island. Knox County, Maine. Plate 2-A in U.S. Geological Survey. Bulletin 313. 1907. #1:/Maine-Bulletin 313/dtn00180 ID. Dale, T.N. 180 Sands quarry in Vinalhaven, looking S. 80 degrees E., showing the curvature of the sheets, the intersecting joint face, and the N. 10 degrees E. channeling along the "cut- off". Knox County, Maine. Plate 6-A in U.S. Geological Survey. Bulletin 313. 1907. #1:/Maine-Bulletin 313/dtn00181 ID. Dale, T.N. 181 High Isle, Muscle Ridge plantation, looking east, showing sheets crossed by a N. 75 degrees W. heading. Knox County, Maine. Plate 8-A in U.S. Geological Survey. Bulletin 313. 1907. Plate 16-A in U.S. Geological Survey. Bulletin 738. 1923. #1:/Maine-Bulletin 313/dtn00182 ID. Dale, T.N. 182 Ryan-Parker quarry on Crotch Island, looking southwest, showing sheet structure; the thickest sheet measure 25 feet and is split along the rift. Hancock County, Maine. Plate 3-A in U.S. Geological Survey. Bulletin 313. 1907. Plate 11-A in U.S. Geological Survey. Bulletin 738. 1923. #1:/Maine-Bulletin 313/dtn00183 ID. Dale, T.N. 183 Southern half of Crotch Island; Goss quarry at left, Ryan-Parker quarry at right, showing concentric sheet structure crossed by vertical east-west joints, looking west from Rock Island. Hancock County, Maine. Plate 2-B in U.S. Geological Survey. Bulletin 313. 1907. Plate 10-B in U.S. Geological Survey. Bulletin 738. 1923. #1:/Maine-Bulletin 313/dtn00185 ID. Dale, T.N. 185 White quarry in Bluehill, looking N. 10 degrees W., showing the lenticular sheets crossed by a vertical joint curving from a N. 50 degrees E. course. The black vertical streaks are "underground water" issuing between the sheets. Hancock County, Maine. Plate 6-B in U.S. Geological Survey. Bulletin 313. 1907. Plate 14-B in U.S. Geological Survey. Bulletin 738. 1923. #1:/Maine-Bulletin 313/dtn00186 ID. Dale, T.N. 186 Eastern side of Mosquito Mountain, town of Frankfort, looking northwest; showing sheet and dome structure and erosion of the sheets. Waldo County, Maine. Plate 3-B in U.S. Geological Survey. Bulletin 313. 1907. Plate 11-B in U.S. Geological Survey. Bulletin 738. 1923. #1:/Maine-Bulletin 313/dtn00187 ID. Dale, T.N. 187 Allen quarry, west side of Somes Sound, Mount Desert, looking N. 15 degrees W., showing thin lenticular sheets crossed by a vertical diabase dike, faulted on the fourth sheet from bottom of quarry; displacement, 16 inches along the sheet. Hancock County, Maine. Plate 8-B in U.S. Geological Survey. Bulletin 313. 1907. Plate 16-B in U.S. Geological Survey. Bulletin 738. 1923. #1:/Maine-Bulletin 313/dtn00188 ID. Dale, T.N. 188 Crabtree & Havey quarry in Sullivan, south side showing irregularity in thickness of sheets owing to their lenticular form; also 9 black knots. The cuts are along grain and hard way. Hancock County, Maine. Plate 5-A in U.S. Geological Survey. Bulletin 313. 1907. Plate 13-B in U.S. Geological Survey. Bulletin 738. 1923. #1:/Maine-Bulletin 313/dtn00190 ID. Dale, T.N. 190 Crabtree & Havey quarry in Sullivan, east wall, showing lenticular form of sheets in cross section on a joint face. Hancock County, Maine. Plate 5-B in U.S. Geological Survey. Bulletin 313. 1907. Plate 13-A in U.S. Geological Survey. Bulletin 738. 1923. #1:/Maine-Bulletin 313/dtn00191 ID. Dale, T.N. 191 Pleasant River black granite quarry in Addison, looking north-northwest, showing the sheets crossed by frequent joints striking N. 80 degrees E., the banding of the olivine gabbro, and the several dikes of whitish quartz monzonite. Washington County, Maine. Plate 10-A in U.S. Geological Survey. Bulletin 313. 1907. #1:/Maine-Bulletin 313/dtn00192 ID. Dale, T.N. 192 East corner of Waldoboro quarry, showing contact between the granite in horizontal sheets and east-northeast dipping of strata. Lincoln County, Maine. Plate 9-A in U.S. Geological Survey. Bulletin 313. 1907. Plate 17-A in U.S. Geological Survey. Bulletin 738. 1923. #1:/Maine-Bulletin 313/dtn00196 ID. Dale, T.N. 196 Stinchfield quarry near Hallowell, looking west-northwest; showing the sheets gradually increasing in thickness downward, crossed by joint and overlain by glacial drift. Kennebec County, Maine. Plate 4-B in U.S. Geological Survey. Bulletin 313. 1907. Plate 12-B in U.S. Geological Survey. Bulletin 738. 1923. #1:/Maine-Bulletin 313/dtn00197 ID. Dale, T.N. 197 Northwest wall of Longfellow quarry near Hallowell, showing intersection of two headings, one with a NW., the other with a N. 65 degrees E strike; also the progressive concentric ferruginous discoloration ("sap") from the sheet and joint surfaces. Kennebec County, Maine. Plate 9-B in U.S. Geological Survey. Bulletin 313. 1907. Plate 17-B in U.S. Geological Survey. Bulletin 738. 1923. #1:/Maine-Bulletin 313/dtn00201 ID. Dale, T.N. 201 Round Pond black granite (lower) quarry, showing the quartz, diorite traversed by a small dike of pegmatite, and both crossed by a 2 foot 6 inch diabase dike, looking west-southwest, the diorite show joints parallel to the dike. Lincoln County, Maine. Plate 11-A in U.S. Geological Survey. Bulletin 313. 1907. Plate 8-B in U.S. Geological Survey. Bulletin 738. 1923. #1:/Maine-Bulletin 313/dtn00203 ID. Dale, T.N. 203 Round Pond black granite (lower) quarry, southwest wall, showing a tongue of schist within the diorite, crossed by sheet structure; joint at the right. Lincoln County, Maine. Plate 11-B in U.S. Geological Survey. Bulletin 313. 1907. #1:/Maine-Bulletin 313/dtn00204 ID. Dale, T.N. 204 Lower edge of schist inclusion in granite on working face of Freeport quarry, showing contact of schist and granite; also schist fragments more or less completely detached from the inclusion. The black streak on the granite is ferruginous stain from the biotite schist. Cumberland County, Maine. Plate 7-B in U.S. Geological Survey. Bulletin 313. 1907. Plate 15-B in U.S. Geological Survey. Bulletin 738. 1923. #1:/Colorado-Bulletin 297/ghs00020 ID. Gale, H.S. 20 Yampa valley and volcanic stocks north of Yampa. Routt County, Colorado. 1905. Plate 4-A in U.S. Geological Survey. Bulletin 297. 1906. #1:/Colorado-Bulletin 297/ghs00045 ID. Gale, H.S. 45 Columnar coal seam on upper Wolf creek. Routt County, Colorado. 1905. Plate 9-B in U.S. Geological Survey. Bulletin 297. 1906. #1:/Colorado-Bulletin 297/ghs00047 ID. Gale, H.S. 47 Williams Park and the lower barren hogbacks of the Mesaverde formation, from Dunkley Post Office. Routt County, Colorado. 1905. Plate 5 in U.S. Geological Survey. Bulletin 297. 1906. #1:/Colorado-Bulletin 297/ghs00049 ID. Gale, H.S. 49 Trout creek sandstone in Yampa Canyon. Routt County, Colorado. 1905. Plate 6 in U.S. Geological Survey. Bulletin 297. 1906. #1:/Colorado-Bulletin 297/ghs00050 ID. Gale, H.S. 50 Trout creek sandstone in Yampa Canyon. Routt County, Colorado. 1905. Plate 6 in U.S. Geological Survey. Bulletin 297. 1906. #1:/Colorado-Bulletin 297/ghs0057a ID. Gale, H.S. 57a Twentymile sandstone at Wadge Ranch, Yampa Canyon. Routt County, Colorado. 1905. Plate 7 in U.S. Geological Survey. Bulletin 297. 1906. #1:/Colorado-Bulletin 297/ghs00058 ID. Gale, H.S. 58 Twentymile sandstone at Wadge Ranch, Yampa Canyon. Routt County, Colorado. 1905. Plate 7 in U.S. Geological Survey. Bulletin 297. 1906. #1:/Colorado-Bulletin 297/ghs00059 ID. Gale, H.S. 59 Structure and topography of Mesaverde formation at Dunkley Canyon. Routt County, Colorado. 1905. Plate 8 in U.S. Geological Survey. Bulletin 297. 1906. #1:/Colorado-Bulletin 297/ghs00060 ID. Gale, H.S. 60 Structure and topography of Mesaverde formation at Dunkley Canyon. Routt County, Colorado. 1905. Plate 8 in U.S. Geological Survey. Bulletin 297. 1906. #1:/Colorado-Bulletin 297/ghs00085 ID. Gale, H.S. 85 Anthracite coal seam and overlying igneous sheet at "the Potholes" on Elkhead creek. Moffat County, Colorado. 1905. Plate 9-A in U.S. Geological Survey. Bulletin 297. 1906. #1:/United States-Bulletin 307/gan00247 ID. Gannett, H. 247 Sketch of framed signal for us where observing tower is not necessary, camp scene. United States. Plate 3 in U.S. Geological Survey. Bulletin 307. 1906. #1:/Georgia-Bulletin 293/glc00009 ID. Graton, L.C. 9 Contact of granite and mica schists at Benning mine, main contact 2 feet to right of hammer, injected zone about hammer, granite dikes to left. Lumpkin County, Georgia. 1904. Plate 8 in U.S. Geological Survey. Bulletin 293. 1906. #1:/South Carolina-Bulletin 293/glc00012 ID. Graton, L.C. 12 Limestone quarry at Gaffney, showing stratification and soil derived by decomposition of rock in place, dolomitic beds above to right. Cherokee County, South Carolina. 1904. Plate 2 in U.S. Geological Survey. Bulletin 293. 1906. #1:/South Carolina-Bulletin 293/glc00013 ID. Graton, L.C. 13 Beguelin ore body, Haile mine, showing old levels and stopes exposed by open cut, looking southwest. Lancaster County, South Carolina. 1904. Plate 7 in U.S. Geological Survey. Bulletin 293. 1906. #1:/South Carolina-Bulletin 293/glc00015 ID. Graton, L.C. 15 Beguelin ore body, Haile mine; showing dip and interfoliated diabase dike now decomposed, looking west. Lancaster County, South Carolina. 1904. Plate 6 in U.S. Geological Survey. Bulletin 293. 1906. #1:/South Carolina-Bulletin 293/glc00017 ID. Graton, L.C. 17 Side of diabase dike exposed in the Haile Pit; major corrugations represent dip of ore- bearing rock, which have been mined away, vertical streaks due to water stains. Lancaster County, South Carolina. 1904. Plate 4 in U.S. Geological Survey. Bulletin 293. 1906. #1:/South Carolina-Bulletin 293/glc00019 ID. Graton, L.C. 19 Haile ore body near bottom of Haile pit: showing foliation and dip, looking northeast. Lancaster County, South Carolina. 1904. Plate 5 in U.S. Geological Survey. Bulletin 293. 1906. #1:/Alaska-Bulletin 289/mgc00189 ID. Martin, G.C. 189 Matanuska River at low water, looking down from near the mouth of Kings creek; showing general character of the lower valley. Matanuska district, Cook Inlet region, Alaska. 1904. Plate 2-A, in U.S. Geological Survey. Bulletin 289. 1906. #1:/Alaska-Bulletin 289/mgc00190 ID. Martin, G.C. 190 Matanuska River at low water, looking down from near the mouth of Kings creek; showing general character of the lower valley. Matanuska district, Cook Inlet region, Alaska. 1904. Plate 2-A, in U.S. Geological Survey. Bulletin 289. 1906. #1:/Alaska-Bulletin 289/mgc00201 ID. Martin, G.C. 201 Cliffs on west bank of Chickaloon creek, showing coal bed, sill and fold. Anchorage district, Cook Inlet region, Alaska. 1904. Plate 4-B, in U.S. Geological Survey. Bulletin 289. 1906. #1:/Alaska-Bulletin 289/mgc00202 ID. Martin, G.C. 202 Cliffs on west bank of Chickaloon creek, showing coal bed, sill and fold. Anchorage district, Cook Inlet region, Alaska. 1904. Plate 4-B, in U.S. Geological Survey. Bulletin 289. 1906. #1:/Alaska-Bulletin 289/mgc00203 ID. Martin, G.C. 203 Cliffs on west bank of Chickaloon creek, showing coal bed, sill and fold. Anchorage district, Cook Inlet region, Alaska. 1904. Plate 4-B, in U.S. Geological Survey. Bulletin 289. 1906. #1:/Alaska-Bulletin 289/mgc00208 ID. Martin, G.C. 208 Castle Mountain from Chickaloon creek. Anchorage district, Cook Inlet region, Alaska. 1904. Plate 4-A, in U.S. Geological Survey. Bulletin 289. 1906. #1:/Alaska-Bulletin 289/mgc00209 ID. Martin, G.C. 209 Castle Mountain from Chickaloon creek. Anchorage district, Cook Inlet region, Alaska. 1904. Plate 4-A, in U.S. Geological Survey. Bulletin 289. 1906. #1:/Alaska-Bulletin 289/mgc00210 ID. Martin, G.C. 210 Castle Mountain from Chickaloon creek. Anchorage district, Cook Inlet region, Alaska. 1904. Plate 4-A, in U.S. Geological Survey. Bulletin 289. 1906. #1:/Alaska-Bulletin 289/mgc00213 ID. Martin, G.C. 213 Boulder creek with Anthracite Ridge in the middle background, from the west; showing the flood plain of Boulder creek above the gorge, or where it is flowing on the old upland surface. Anchorage district, Cook Inlet region, Alaska. 1904. Plate 2-B, in U.S. Geological Survey. Bulletin 289. 1906. #1:/Alaska-Bulletin 289/mgc00214 ID. Martin, G.C. 214 Boulder creek with Anthracite Ridge in the middle background, from the west; showing the flood plain of Boulder creek above the gorge, or where it is flowing on the old upland surface. Anchorage district, Cook Inlet region, Alaska. 1904. Plate 2-B, in U.S. Geological Survey. Bulletin 289. 1906. #1:/Alaska-Bulletin 287/wcw00014 ID. Wright, C.W. 14 Lower end of rock slide of 1901, Last Chance basin, Gold Creek. Juneau district, Southeastern Alaska region, Alaska. Plate 14-A in U.S. Geological Survey. Bulletin 287. 1906. #1:/Alaska-Bulletin 287/wcw00017 ID. Wright, C.W. 17 Stringer lead in brown diorite, Ebner mine, Gold creek, the slate wall of the diorite is seen in the upper right. Juneau district, Southeastern Alaska region, Alaska. 1903. Plate 11-A in U.S. Geological Survey. Bulletin 287. 1906. #1:/Alaska-Bulletin 287/wcw00018 ID. Wright, C.W. 18 Stringer lead in brown diorite, Ebner mine, Gold creek, the slate wall of the diorite is seen in the upper right in wcw00017. Juneau district, Southeastern Alaska region, Alaska. 1903. Plate 11-B in U.S. Geological Survey. Bulletin 287. 1906. #1:/Alaska-Bulletin 287/wcw00019 ID. Wright, C.W. 19 Stringer lead in black slate, Alaska-Juneau mine, Gold creek. Juneau district, Southeastern Alaska region, Alaska. 1903. Plate 13-B in U.S. Geological Survey. Bulletin 287. 1906. #1:/Alaska-Bulletin 287/wcw00020 ID. Wright, C.W. 20 Stringer lead in black slate, Alaska-Juneau mine, Gold creek. Juneau district, Southeastern Alaska region, Alaska. 1903. Plate 13-A in U.S. Geological Survey. Bulletin 287. 1906. #1:/Alaska-Bulletin 287/wcw00209 ID. Wright, C.W. 209 Coal prospect on east side of Diamond Island, Mitchell bay. Admiralty district, Southeastern Alaska region, Alaska. 1904. Plate 35-A in U.S. Geological Survey. Bulletin 287. 1906. #1:/Alaska-Bulletin 287/wcw00217 ID. Wright, C.W. 217 Coal prospect on south side of Mitchell Bay. Admiralty district, Southeastern Alaska region, Alaska. 1904. Plate 35-B in U.S. Geological Survey. Bulletin 287. 1906. #1:/California-Bulletin 309/egh00033 ID. Eldridge, G.H. 33 Panorama across Hopper Canyon to Valley of Piru River, from Hopper Peak, Ventura County, California. 1902. Plate 2-A in U.S. Geological Survey. Bulletin 309. 1907. #1:/California-Bulletin 309/egh00034 ID. Eldridge, G.H. 34 Panorama across Hopper Canyon to Valley of Piru River, from Hopper Peak, Ventura County, California. 1902. Plate 2-A in U.S. Geological Survey. Bulletin 309. 1907. #1:/California-Bulletin 309/egh00035 ID. Eldridge, G.H. 35 Panorama across Hopper Canyon to Valley of Piru River, from Hopper Peak, Ventura County, California. 1902. Plate 2-A in U.S. Geological Survey. Bulletin 309. 1907. #1:/California-Bulletin 309/egh00036 ID. Eldridge, G.H. 36 Panorama across Hopper Canyon to Valley of Piru River, from Hopper Peak, Ventura County, California. 1902. Plate 2-A in U.S. Geological Survey. Bulletin 309. 1907. #1:/California-Bulletin 309/egh00044 ID. Eldridge, G.H. 44 Modelo Wells, Modelo Canyon, Ventura County, California. 1902. Plate 8-A in U.S. Geological Survey. Bulletin 309. 1907. #1:/California-Bulletin 321/egh00048 ID. Eldridge, G.H. 48 Summerland field, from Ortega Hill, looking south, showing general configuration of coast, terrace on which Summerland and some of the wells are situated and location and relative lengths of the various wharves. Santa Barbara County, California. March 1902. Plate 2-A in U.S. Geological Survey. Bulletin 321. 1907. #1:/California/egh00049 ID. Eldridge, G.H. 49 Wharves and oil wells in front of Sumerland, looking west. Santa Barbara County, California. March 1902. #1:/California/egh00051 ID. Eldridge, G.H. 51 Westward from head of Duquesne wharf, at oil derricks and wharves, Sumerland, Santa Barbara County, California. March 1902. #1:/California-Bulletin 324/hrl00001 ID. Humphrey, R.L. 1 Collapsed Pilarcitos 30 inch wrought iron pipe line near trestle crossing the fault. The slip produced compression on the pipe line, which buckled it, thereby throwing down the trestle support. The consequent parting of the pipe line suddenly released the water from the pipe, causing a vacuum which brought about the collapse. San Francisco County, California 1906. Plate 10-A in U.S. Geological Survey. Bulletin 324. 1907. #1:/California-Bulletin 324/hrl00002 ID. Humphrey, R.L. 2 House on line of fault, torn asunder by earthquake, near Wrights Station on Southern Pacific Railroad. Santa Cruz County, California 1906. Plate 10-B in U.S. Geological Survey. Bulletin 324. 1907. #1:/California-Bulletin 324/hrl00003 ID. Humphrey, R.L. 3 Complete wreck by earthquake, courthouse and Hall of Records, Santa Rosa, wreck due to light wooden framing, insufficient bracing and poor mortar. Sonoma County, California 1906. Plate 14-B in U.S. Geological Survey. Bulletin 324. 1907. #1:/Alaska-Bulletin 327/kno00012 ID. Knopf, A. 12 Limestone at headwaters of Billy Creek (note fault). Matanuska district, Cook Inlet region, Alaska. 1906. Plate 4-B in U.S. Geological Survey. Bulletin 327. 1912. #1:/Alaska-Bulletin 327/pai00752 ID. Paige, S. 752 Rugged topography due to alpine glaciation. Matanuska district, Cook Inlet region, Alaska. 1906. Plate 4-C in U.S. Geological Survey. Bulletin 327. 1912 #1:/Alaska-Bulletin 327/pai00754 ID. Paige, S. 754 Conglomerate mountain, between Moose and Eska creeks. Matanuska district, Cook Inlet region, Alaska. 1906. Plate 3-A in U.S. Geological Survey. Bulletin 327. 1912. #1:/Alaska-Bulletin 327/pai00755 ID. Paige, S. 755 Lake in fault block conglomerate mountain. Matanuska district, Cook Inlet region, Alaska. 1906. Plate 4-A in U.S. Geological Survey. Bulletin 327. 1912. #1:/Alaska-Bulletin 327/pai00760 ID. Paige, S. 760 Intercalated breccias and flows east of Chickaloon creek, Anchorage district, Cook Inlet region, Alaska. 1906. Plate 3-D in U.S. Geological Survey. Bulletin 327. #1:/Alaska-Bulletin 327/pai00762 ID. Paige, S. 762 Stratified breccias and tufts east of Chickaloon Creek. Anchorage district, Cook Inlet region, Alaska. 1906. Plate 3-B in U.S. Geological Survey. Bulletin 327. 1912. #1:/Alaska-Bulletin 327/pai00766 ID. Paige, S. 766 Vertical walled canyons in conglomerate, Chickaloon creek, Anchorage district, Cook Inlet region, Alaska. 1906. Plate 3-C in U.S. Geological Survey. Bulletin 327. 1912. #1:/Alaska-Bulletin 327/pai00772 ID. Paige, S. 772 Tributary (glacier) receding from Chickaloon (trunk) glacier. Anchorage district, Cook Inlet region, Alaska. 1906. Plate 3-D in U.S. Geological Survey. Bulletin 327. #1:/Rhode Island-Bulletin 354/dtn0209a ID. Dale, T.N. 209a Contact of granite with overlying gneiss on west side of Klondike quarry, near Niantic, showing pegmatite dikes in the gneiss apparently starting from the granite surface; also sheet structure passing from granite into gneiss. Washington County, Rhode Island. 1906. Plate 9-A in U.S. Geological Survey. Bulletin 354. 1908. #1:/Rhode Island-Bulletin 354/dtn00211 ID. Dale, T.N. 211 Ovoidal block of fine statuary granite (quartz monzonite) produced by weathering with a heading at Redstone quarry, Westerly; hammer is 20.5 inches long. Washington County, Rhode Island. 1906. Plate 8-A in U.S. Geological Survey. Bulletin 354. 1908. #1:/Massachusetts-Bulletin 354/dtn00212 ID. Dale, T.N. 212 Upper quarry of Pigeon Hill Granite Company, Rockport, looking southwest, showing thick granite sheets intersected by basic dikes. The black streaks in the front dike are underground water from sheet surfaces. Essex County, Massachusetts. 1906. Plate 5-A in U.S. Geological Survey. Bulletin 354. 1908. #1:/Massachusetts-Bulletin 354/dtn00213 ID. Dale, T.N. 213 Deep pit quarry of Rockport Granite Company, near Bay View on Cape Ann, looking north; showing in upper part thick faulted dike of hornblende diabase, intersected by thin dike of lamprophyre without biotite, reaching to bottom at left; also in center, below an irregular injection of hornblende diabase, joint planes, some of which are parallel to big dike. Essex County, Massachusetts. 1906. Plate 5-B in U.S. Geological Survey. Bulletin 354. 1908. #1:/New Hampshire-Bulletin 354/dtn00217 ID. Dale, T.N. 217 Redstone Ledge, Conway, looking north 30 degrees E. Showing on the left, quarry in green granite and on the right, one in pink granite; also the sheets dipping away from axis of hill. Boundary between the two granites runs diagonally up the hill. In foreground is stone crusher for waste. Carroll County, New Hampshire. 1906. Plate 7-A in U.S. Geological Survey. Bulletin 354. 1908. #1:/New Hampshire-Bulletin 354/dtn00219 ID. Dale, T.N. 219 Contact of granite and overlying gneiss at Milford Granite Company's quarry, looking west-northwest. Pegmatite dikes in gneiss. Sheet structure in both rocks, but disconnected. Hillsborough County, New Hampshire. 1906. Plate 6-A in U.S. Geological Survey. Bulletin 354. 1908. #1:/New Hampshire-Bulletin 354/dtn00221 ID. Dale, T.N. 221 Pegmatite dikes in groups at the Young Granite quarry, Milford, looking north-northwest, a typical heading at the left; freshly cleared hummocky surface at top. Hillsborough County, New Hampshire. 1906. Plate 6-B (retouched) in U.S. Geological Survey. Bulletin 354. 1908. #1:/Massachusetts-Bulletin 354/dtn00224 ID. Dale, T.N. 224 Dell Hitchcock granite quarry, North Commons, Quincy, from the west side, showing lenticular sheets and their increase in thickness downward, depth 100 feet. Norfolk County, Massachusetts. 1906. Plate 3-A in U.S. Geological Survey. Bulletin 354. 1908. #1:/Massachusetts-Bulletin 354/dtn00226 ID. Dale, T.N. 226 South side of Galvin granite quarry, North Commons, Quincy, showing westward dipping quartz veins crossed by short vertical subjoints. Norfolk County, Massachusetts. 1906. Plate 3-B in U.S. Geological Survey. Bulletin 354. 1908. #1:/Vermont-Bulletin 354/dtn00236 ID. Dale, T.N. 236 Granite quarry at west foot of Black Mountain, West Dummerston, showing thin sheets formed after opening of quarry and parted by a compressive strain operating about north and south. Hammer about 30 inches long; head 6 inches long. Windham County, Vermont. 1906. Plate 8-B in U.S. Geological Survey. Bulletin 354. 1908. #1:/Massachusetts-Bulletin 354/dtn0326a ID. Dale, T.N. 326a Ball of polished Quincy granite from the Wigwam quarry, diameter, 76 inches, weight 22,000 pounds. West Quincy Norfolk County, Massachusetts. 1906. Plate 4 in U.S. Geological Survey. Bulletin 354. 1908. #1:/Montana-Bulletin 356/fca00036 ID. Fisher, C.A. 36 Madison limestone overlain by Quadrant shale near Riceville, Cascade County, Montana. 1906. Plate 5 in U.S. Geological Survey. Bulletin 356. 1909. #1:/Montana-Bulletin 356/fca00055 ID. Fisher, C.A. 55 Basal Jurassic sandstone lying conformably on Madison limestone near Stockett, about a mile south of fca00056. Cascade County, Montana. 1906. Plate 6-A in U.S. Geological Survey. Bulletin 356. 1909. #1:/Montana-Bulletin 356/fca00056 ID. Fisher, C.A. 56 Basal Jurassic sandstone lying conformably on Madison limestone near Stockett, Cascade County, Montana. 1906. Plate 6-B in U.S. Geological Survey. Bulletin 356. 1909. #1:/Montana-Bulletin 356/fca0056a ID. Fisher, C.A. 56a Basal Jurassic sandstone lying conformably on Madison limestone near Stockett, Cascade County, Montana. 1906. Plate 6-B in U.S. Geological Survey. Bulletin 356. 1909. #1:/Montana-Bulletin 356/fca00057 ID. Fisher, C.A. 57 Dry bed of Belt Creek, near Belt, Cascade County, Montana. 1906. Plate 3 in U.S. Geological Survey. Bulletin 356. 1909. #1:/Colorado-Bulletin 350/ghs00341 ID. Gale, H.S. 341 The "Rim Rock" in Raven Park. Rio Blanco County, Colorado. August 1907. Plate 4-A in U.S. Geological Survey. Bulletin 356. 1909. #1:/Colorado-Bulletin 350/ghs00342 ID. Gale, H.S. 342 The "Rim Rock" in Raven Park. Rio Blanco County, Colorado. August 1907. Plate 4-A in U.S. Geological Survey. Bulletin 356. 1909. #1:/Colorado-Bulletin 350/ghs00372 ID. Gale, H.S. 372 Southern margin of Blue Mountain. Rio Blanco County, Colorado. August 1907. Plate 4- B in U.S. Geological Survey. Bulletin 356. 1909. #1:/Colorado-Bulletin 350/ghs00373 ID. Gale, H.S. 373 Southern margin of Blue Mountain. Rio Blanco County, Colorado. August 1907. Plate 4- B in U.S. Geological Survey. Bulletin 356. 1909. #1:/California-Bulletin 355/hfl00216 ID. Hess, F.L. 216 Northern Hill at Willamette Pulp and Paper company's magnesite near Porterville, looking nearly north, nearly vertical vein (near or at the smaller mine adit). The lower line ascending toward the right is a tramway; the upper one is a wagon road. Tulare County, California. 1905. Plate 10-A and B printed as a panorama in U.S. Geological Survey. Bulletin 355. 1908. #1:/California-Bulletin 355/hfl00217 ID. Hess, F.L. 217 Northern Hill at Willamette Pulp and Paper company's magnesite near Porterville, looking nearly north, lower "blanket" vein (apparently the summit), The lower line ascending toward the right is a tramway; the upper one is a wagon road. Tulare County, California. 1905. Plate 10-A and B printed as a panorama in U.S. Geological Survey. Bulletin 355. 1908. #1:/California-Bulletin 355/hfl00218 ID. Hess, F.L. 218 Amphibolite dike cutting through flat vein of magnesite, 4 miles northeast of Porterville, small magnesite vein have formed in the amphibolite. Tulare County, California. 1905. Plate 9-A in U.S. Geological Survey. Bulletin 355. 1908. #1:/California-Bulletin 355/hfl00219 ID. Hess, F.L. 219 Outcrop of Stockwork of veins at north end of Willamette Pulp and Paper Company's deposits near Porterville; broken magnesite ready for calcining in foreground. Tulare County, California. 1905. Plate 11-A in U.S. Geological Survey. Bulletin 355. 1908. #1:/California-Bulletin 355/hfl00222 ID. Hess, F.L. 222 Furnace for calcining magnesite at Willamette Pulp and Paper Company's deposits near Porterville. Tulare County, California. 1905. Plate 11-B in U.S. Geological Survey. Bulletin 355. 1908. #1:/California-Bulletin 355/hfl00223 ID. Hess, F.L. 223 Crushed magnesite vein, 2 feet wide, near furnace 4 miles northeast of Porterville Tulare County, California. 1905. Plate 9-B in U.S. Geological Survey. Bulletin 355. 1908. #1:/California-Bulletin 355/hfl00226 ID. Hess, F.L. 226 Outcrop of magnesite vein on Walter's claim, Pope valley, the face exposed is about 6 feet high. Napa County, California. 1905. Plate 5-C in U.S. Geological Survey. Bulletin 355. 1908. #1:/California-Bulletin 355/hfl00242 ID. Hess, F.L. 242 Outcrop of magnesite on Hixon ranch, Mendocino County, California. 1905. Plate 5-A in U.S. Geological Survey. Bulletin 355. 1908. #1:/California-Bulletin 355/hfl00247 ID. Hess, F.L. 247 Entrance to lower tunnel on Sonoma Magnesite company's claim near Cazadero. Sonoma County, California. 1905. Plate 5-B in U.S. Geological Survey. Bulletin 355. 1908. #1:/California-Bulletin 355/hfl00253 ID. Hess, F.L. 253 Sheeted serpentine containing thin veins of magnesite, near Deer creek, Tulare County, California. 1905. Plate 8-B in U.S. Geological Survey. Bulletin 355. 1908. #1:/California-Bulletin 355/hfl00254 ID. Hess, F.L. 254 Magnesite vein on Snow Cap claim, north side of Kings River, 9 miles east of Sanger. Fresno County, California. 1905. Plate 12-B in U.S. Geological Survey. Bulletin 355. 1908. #1:/California-Bulletin 355/hfl00256 ID. Hess, F.L. 256 Magnesite vein on south side of Kings River, 9 miles east of Sanger. Fresno County, California. 1905. Plate 12-A in U.S. Geological Survey. Bulletin 355. 1908. #1:/California-Bulletin 355/hfl00284 ID. Hess, F.L. 284 Stockwork of magnesite veins 3.5 miles south of Winchester. Riverside County, California. 1905. Plate 8-A in U.S. Geological Survey. Bulletin 355. 1908. #1:/California-Bulletin 355/hfl01280 ID. Hess, F.L. 1280 Magnesite weathered from under several inches of clay, the surface is soft, from Red Mountain, Santa Clare County, California. 1905. Plate 4-B in U.S. Geological Survey. Bulletin 355. 1908. #1:/California-Bulletin 355/hfl01281 ID. Hess, F.L. 1281 Small irregular vein of magnesite in serpinetine from Red Mountain, Santa Clare County, California. 1905. Plate 4-A in U.S. Geological Survey. Bulletin 355. 1908. #1:/California-Bulletin 355/hfl01283 ID. Hess, F.L. 1283 Cracks in magnesite apparently due to shrinkage, less compact magnesite coated with a thin layer of quartz, also cracked, from locality 4 miles northeast of Porterville. Tulare County, California. 1905. Plate 6-B in U.S. Geological Survey. Bulletin 355. 1908. #1:/California-Bulletin 355/hfl01295 ID. Hess, F.L. 1295 Specimen of magnesite showing conchoidal fracture, from vicinity of Success school house, 8 miles west of Porterville. Tulare County, California. 1905. Plate 2-A in U.S. Geological Survey. Bulletin 355. 1908. #1:/California-Bulletin 355/hfl01296 ID. Hess, F.L. 1296 Specimen of magnesite showing conchoidal fracture, from vicinity of Red Mountain, Santa Clare County, California. 1905. Plate 2-B in U.S. Geological Survey. Bulletin 355. 1908. #1:/California-Bulletin 355/hfl01297 ID. Hess, F.L. 1297 Weathered surfaces of magnesite from Red Mountain, Santa Clare County, California. 1905. Plate 3-A in U.S. Geological Survey. Bulletin 355. 1908. #1:/California-Bulletin 355/hfl01298 ID. Hess, F.L. 1298 Weathered surfaces of magnesite from locality northeast of Porterville. Tulare County, California. 1905. Plate 3-B in U.S. Geological Survey. Bulletin 355. 1908. #1:/California-Bulletin 355/hfl01299 ID. Hess, F.L. 1299 Weathered surfaces of magnesite from locality northeast of Porterville. Tulare County, California. 1905. Plate 3-C in U.S. Geological Survey. Bulletin 355. 1908. #1:/California-Bulletin 355/hfl01300 ID. Hess, F.L. 1300 Cracks in magnesite apparently due to shrinkage, compact magnesite from Hixon ranch, Mendocino County, California. 1905. Plate 6-A in U.S. Geological Survey. Bulletin 355. 1908. #1:/California-Bulletin 355/hfl01301 ID. Hess, F.L. 1301 Structure of magnesite on Bay Cities Water Company's land on Coyote creek, specimen from the upper deposit, showing a natural size. Santa Clara County, California. 1905. Plate 7-A in U.S. Geological Survey. Bulletin 355. 1908. #1:/Arizona-Bulletin 352/lwt00088 ID. Lee, W.T. 88 Chemhuevis gravel near Bull's Head, overlying granite at left, showing upper and lower divisions of gravel. Mohave County, Arizona. 1903. Plate 3-B in U.S. Geological Survey. Bulletin 352. 1908. #1:/Arizona-Bulletin 352/lwt00089 ID. Lee, W.T. 89 Colorado River and gravel filled valley at Bulls Head Rock Mohave County, Arizona. 1903. Plate 10-A in U.S. Geological Survey. Bulletin 352. 1908. #1:/Arizona-Bulletin 352/lwt00136 ID. Lee, W.T. 136 North wall of canyon in Grand Wash trough. Mohave County, Arizona. 1903. Plate 7-A in U.S. Geological Survey. Bulletin 352. 1908. #1:/Arizona-Bulletin 352/lwt00139 ID. Lee, W.T. 139 Temple Bar conglomerate resting upon older breccia, Temple Bar. Mohave County, Arizona. 1903. Plate 8-A in U.S. Geological Survey. Bulletin 352. 1908. #1:/Arizona-Bulletin 352/lwt00140 ID. Lee, W.T. 140 Entrance to Black Canyon, Mohave County, Arizona. 1903. Plate 8-B in U.S. Geological Survey. Bulletin 352. 1908 #1:/Arizona-Bulletin 352/lwt00145 ID. Lee, W.T. 145 Castle like erosional forms in Black Mesa at Union Pass. Mohave County, Arizona. 1903. Plate 6-A in U.S. Geological Survey. Bulletin 352. 1908. #1:/Arizona-Bulletin 352/lwt00146 ID. Lee, W.T. 146 Tilted gravel in Sacramento Wash Mohave County, Arizona. 1903. Plate 10-B in U.S. Geological Survey. Bulletin 352. 1908. #1:/Arizona-Bulletin 352/lwt00150 ID. Lee, W.T. 150 Signal Canyon, Aquarius Mountains, showing lava capped gravel and sand filling. Mohave County, Arizona. 1903. Plate 3-A in U.S. Geological Survey. Bulletin 352. 1908. #1:/Arizona-Bulletin 352/lwt00153 ID. Lee, W.T. 153 Sacramento Valley at south end of Hualpai Mountains Mohave County, Arizona. 1903. Plate 11 in U.S. Geological Survey. Bulletin 352. 1908. #1:/Arizona-Bulletin 352/lwt00158 ID. Lee, W.T. 158 Basalt capped gravels in Williams Canyon, Apache County, Arizona. 1903. Plate 6-B in U.S. Geological Survey. Bulletin 352. 1908. #1:/Arizona-Bulletin 352/lwt00179 ID. Lee, W.T. 179 Detritus at mouth of Deluge Wash Mohave County, Arizona. 1903. Plate 4-B in U.S. Geological Survey. Bulletin 352. 1908. #1:/Arizona-Bulletin 352/lwt00184 ID. Lee, W.T. 184 Rhyolitic ash near Kingman, Mohave County, Arizona. 1903. Plate 4-A in U.S. Geological Survey. Bulletin 352. 1908. #1:/Alaska-Bulletin 335/mgc00246 ID. Martin, G.C. 246 First Berg Lake with Bering Glacier in background, looking south. Katalla district, Alaska Gulf region, Alaska. 1905. Plate 6-A in U.S. Geological Survey. Bulletin 335. 1908. #1:/Kentucky-Bulletin 349/pwc00033 ID. Phalen, W.C. 33 Abandoned Bellefont furnace, showing ruined head works, west of Ashland. Boyd County, Kentucky. 1905. Plate 5-B in U.S. Geological Survey. Bulletin 349. 1908. #1:/Kentucky-Bulletin 349/pwc00035 ID. Phalen, W.C. 35 Abandoned princess furnace, 1879 west of Princess, Boyd County, Kentucky. 1905. Plate 5-A in U.S. Geological Survey. Bulletin 349. 1908. #1:/Ohio-Bulletin 349/pwc00038 ID. Phalen, W.C. 38 Mahoning sandstone, Little Ice creek, Lawrence County, Ohio. 1905. Plate 3-B in U.S. Geological Survey. Bulletin 349. 1908. #1:/Kentucky-Bulletin 349/pwc00040 ID. Phalen, W.C. 40 Ohio topography, showing level, skyline. Boyd County, Kentucky. 1905. Plate 3-A in U.S. Geological Survey. Bulletin 349. 1908. #1:/West Virginia-Bulletin 348/srw00220 ID. Stone, R.W. 220 Mullins opening on upper Elkhorn coal, head of Elkhorn creek. McDowell County, West Virginia. 1906. Plate 4-A in U.S. Geological Survey. Bulletin 348. 1908. #1:/Virginia-Bulletin 348/srw00233 ID. Stone, R.W. 233 Fault line shown by rocks in bed of stream mouth of Pound River. Dickenson County, Virginia. 1906. Plate 6-A in U.S. Geological Survey. Bulletin 348. 1908. #1:/Virginia-Bulletin 348/srw00235 ID. Stone, R.W. 235 Fault at mouth of Pound River, the mill conceals brecciated zone. Lee conglomerate on right, shale on left. Dickenson County, Virginia. 1906. Plate 6-B in U.S. Geological Survey. Bulletin 348. 1908. #1:/Virginia-Bulletin 348/srw00237 ID. Stone, R.W. 237 Isaac Hurt coal bank, Russell Fork. Buchanan County, Virginia. 1906. Plate 7-A in U.S. Geological Survey. Bulletin 348. 1908. #1:/Montana/srw00310 ID. Stone, R.W. 310 Mess (chuck wagon back) box of a Survey camp wagon, apparently about breakfast time, note the time on the clock, batter in metal bowls, and utensils. Wheatland County, Montana. 1907. #1:/Alaska-Bulletin 347/wcw00308 ID. Wright, C.W. 308 From Boundary Peak down Portland Canal, showing abrupt topographic relief. Yakutat district, Alaska Gulf region, Alaska. 1905. Plate 5-A in U.S. Geological Survey. Bulletin 347. 1908. #1:/Alaska-Glaciers/post0014 ID. Post, A. 14 Alaska Glaciers. Skilak glacier, showing lateral and subglacial lakes. This ice-dammed lake is located in an embayment between Skilak glacier and an unnamed glacier in the Kenai Mountains. An exposed lake can be seen on the left; the radial pattern of crevasses in the center of the glacier suggests that this ice is raised and lowered by alternate filling and draining of a subglacial lake. Water from this lake created a devastating flood in the Kenai River valley in January 1969. Cook Inlet region, Alaska. On sheet 3 of U.S. Geological Survey. Hydrologic investigations. Atlas HA-455. 1971. #1:/Alaska-Glaciers/post0016 ID. Post, A. 16 Alaska Glaciers. Berg Lake- a recently developed hazardous situation, near Katalla. Retreat of an arm of Bering glacier, which in 1905 filled most of this large embayment, has joined five separate lakes that occupied individual bays of the present lake. Lowering of the ice dam if continued will almost certainly lead to the release of immense floods in the near future. The Bering River flood plain and are surrounding Bering Lake are endangered by this increasingly critical situation. Copper River region, Alaska. On sheet 3 of U.S. Geological Survey. Hydrologic investigations. Atlas HA-455. 1971. #1:/Alaska-Glacier Bay/wcw00328 ID. Wright, C.W. 328 Glacier Bay National Park and Preserve, Alaska. Part of Hugh Miller Glacier, 1906. #1:/Alaska-Glacier Bay/wcw0329a ID. Wright, C.W. 329a Glacier Bay National Park and Preserve, Alaska. Observation for sea level, Tidal Inlet. 1906. #1:/Alaska-Glacier Bay/wcw00330 ID. Wright, C.W. 330 Glacier Bay National Park and Preserve, Alaska. Rendu Glacier. 1906. #1:/Alaska-Glacier Bay/wcw00335 ID. Wright, C.W. 335 Glacier Bay National Park and Preserve, Alaska. Carroll Glacier, Queen Inlet. 1906. See Photo No. mbf00013 for matching pair. #1:/Alaska-Glaciers/wcw00346 ID. Wright, C.W. 346 Alaska Glaciers. Davidson glacier, Lynn Canal. Southeastern Alaska. 1906. #1:/Alaska-Glacier Bay/wcw00359 ID. Wright, C.W. 359 Glacier Bay National Park and Preserve, Alaska. Uncovered forest, Morse Glacier. August 1906. #1:/Alaska-Glacier Bay/wcw00364 ID. Wright, C.W. 364 Glacier Bay National Park and Preserve, Alaska. Brooks Glacier from Nunatak. 1906. #1:/Alaska-Glacier Bay/wcw00365 ID. Wright, C.W. 365 Glacier Bay National Park and Preserve, Alaska. Muir Glacier from Nunatak. 1906. #1:/Alaska-Glacier Bay/wcw00369 ID. Wright, C.W. 369 Glacier Bay National Park and Preserve, Alaska. Union Glacier from near station number 31. August 8, 1906. #1:/Alaska-Glacier Bay/wcw00370 ID. Wright, C.W. 370 Glacier Bay National Park and Preserve, Alaska. Muir Glacier terminus, 1906. #1:/Alaska-Glacier Bay/wcw00371 ID. Wright, C.W. 371 Glacier Bay National Park and Preserve, Alaska. Muir Glacier terminus, possibly a panorama with wcw00371. 1906. #1:/Alaska-Glacier Bay/wcw00382 ID. Wright, C.W. 382 Glacier Bay National Park and Preserve, Alaska. Lituya glacier on east arm of Lituya Bay. 1906. #1:/Alaska-Glacier Bay/wcw00384 ID. Wright, C.W. 384 Glacier Bay National Park and Preserve, Alaska. River parallel with shore line 4 miles west of Lituya Bay. #1:/Alaska-Glacier Bay/wcw00427 ID. Wright, C.W. 427 Glacier Bay National Park and Preserve, Alaska. Buried tree trunks exposed on west shore of Glacier Bay north of Berg Inlet. 1906. #1:/Alaska-Glacier Bay/wcw00429 ID. Wright, C.W. 429 Glacier Bay National Park and Preserve, Alaska. Buried forest (trunks) opposite Drake Island. 1906. #1:/Alaska-Glacier Bay/wcw00430 ID. Wright, C.W. 430 Glacier Bay National Park and Preserve, Alaska. Sand deposits near Geikie Glacier. 1906. #1:/Alaska-Glacier Bay/wcw00431 ID. Wright, C.W. 431 Glacier Bay National Park and Preserve, Alaska. Sand deposits east side of Geikie Glacier. 1906. #1:/Alaska-Glacier Bay/wcw00432 ID. Wright, C.W. 432 Glacier Bay National Park and Preserve, Alaska. Buried forest (trunks) near Drake Island. 1906. #1:/Alaska-Glacier Bay/wcw00433 ID. Wright, C.W. 433 Glacier Bay National Park and Preserve, Alaska. Sand deposits near Geikie glacier. 1906. #1:/Alaska-Glaciers/wcw00468 ID. Wright, C.W. 468 Alaska Glaciers. Davidson glacier, Lynn Canal, Southeastern Alaska. 1932. #1:/Alaska-Glaciers/wcw00470 ID. Wright, C.W. 470 Alaska Glaciers. Front of Davidson glacier, Lynn Canal man for scale, Southeastern Alaska. 1932. #1:/Alaska-Glaciers/wcw00473 ID. Wright, C.W. 473 Alaska Glaciers. Pond in front of Davidson glacier, probably H.F. Reid seated at right Southeastern Alaska. 1932. #1:/Alaska-Glaciers/wcw00476 ID. Wright, C.W. 476 Alaska Glaciers. Norris Glacier, Taku Inlet, Southeastern Alaska. 1932. #1:/Alaska-Glaciers/wcw00477 ID. Wright, C.W. 477 Alaska Glaciers. Norris Glacier, Taku Inlet, Southeastern Alaska. 1932. #1:/Alaska-Glaciers/wcw00479 ID. Wright, C.W. 479 Alaska Glaciers. Taku glacier, Southeastern Alaska. 1933. #1:/Alaska-Glacier Bay/wcw00482 ID. Wright, C.W. 482 Glacier Bay National Park and Preserve, Alaska. Wood glacier from station one. 1933. #1:/Alaska-Glacier Bay/wcw00483 ID. Wright, C.W. 483 Glacier Bay National Park and Preserve, Alaska. Favorite Inlet, looking north from near Geikie Inlet. 1933. #1:/Alaska-Glacier Bay/wcw00485 ID. Wright, C.W. 485 Glacier Bay National Park and Preserve, Alaska. Dr. Harry F. Reid, probably near a camera station. 1933. #1:/Alaska-Glaciers/wcw00487 ID. Wright, C.W. 487 Alaska Glaciers. Davidson glacier, Lynn Canal, Southeastern Alaska. 1933. #1:/Alaska-Glaciers/wcw00488 ID. Wright, C.W. 488 Alaska Glaciers. Ice tongue piling up on moraine, front of Davidson glacier, Lynn Canal, Southeastern Alaska. 1933. #1:/Alaska-Glaciers/wcw00489 ID. Wright, C.W. 489 Alaska Glaciers. Retreating ice tongue (in summer), Davidson glacier, Lynn Canal, Southeastern Alaska. 1933. #1:/Alaska-Glacier Bay/wcw00490 ID. Wright, C.W. 490 Glacier Bay National Park and Preserve, Alaska. Part of Grand Pacific glacier, terminus. 1933. #1:/Alaska-Reid/wcw00494 ID. Wright, C.W. 494 Dr. H.F. Reid and party; Tom Dunston upper right; Fred Wright bottom left, and Reid. Southeastern Alaska. 1933. #1:/Alaska-Glacier Bay/wcw00495 ID. Wright, C.W. 495 Glacier Bay National Park and Preserve, Alaska. Granite Island, center of Muir Glacier, (terminus?) with forest. 1933. #1:/Alaska-Glacier Bay/wcw00514 ID. Wright, C.W. 514 Glacier Bay National Park and Preserve, Alaska. Reid Inlet, 1933. #1:/Alaska-Glaciers/wcw00516 ID. Wright, C.W. 516 Alaska Glaciers. Rainbow glacier, Lynn Canal. Southeastern Alaska. 1933. #1:/Alaska-Glacier Bay/wcw00528 ID. Wright, C.W. 528 Glacier Bay National Park and Preserve, Alaska. West side of Geikie Glacier, from station number 6. #1:/Alaska-GlaciEr Bay/wcw0576a ID. Wright, C.W. 576a Glacier Bay National Park and Preserve, Alaska. Muir Inlet south from station E. 1906. #1:/Alaska-Glacier Bay/wcw00578 ID. Wright, C.W. 578 Glacier Bay National Park and Preserve, Alaska. North Nunatak, Muir Glacier, from station number 34. #1:/Alaska-Glacier Bay/wcw00579 ID. Wright, C.W. 579 Glacier Bay National Park and Preserve, Alaska. North Nunatak, Muir Glacier, from station number 34. #1:/Alaska-Glacier Bay/wcw00583 ID. Wright, C.W. 583 Glacier Bay National Park and Preserve, Alaska. South Nunatak, Muir Glacier from station 36. #1:/Alaska-Glacier Bay/wcw0583b ID. Wright, C.W. 583b Glacier Bay National Park and Preserve, Alaska. South Nunatak, Muir Glacier from station 36. #1:/Alaska-Glacier Bay/wcw0583c ID. Wright, C.W. 583c Glacier Bay National Park and Preserve, Alaska. South Nunatak, Muir Glacier from station 36. #1:/Alaska-Glacier Bay/wcw00584 ID. Wright, C.W. 584 Glacier Bay National Park and Preserve, Alaska. South Nunatak, Muir Glacier from station 37a. #1:/Alaska-Glaciers/wcw00608 ID. Wright, C.W. 608 Alaska Glaciers. Davidson glacier, across Lynn Canal, Southeastern Alaska. September 1906. #1:/Alaska-Glacier Bay/wcw00612 ID. Wright, C.W. 612 Glacier Bay National Park and Preserve, Alaska. Lituya Glacier, west arm of Lituya Bay. Southeastern Alaska. August 1906. #1:/Alaska-Glaciers/wcw00613 ID. Wright, C.W. 613 Alaska Glaciers. Taku glacier from outwash plain in of Norris glacier, about north, Southeastern Alaska. 1931. #1:/Alaska-Glaciers/wcw00614 ID. Wright, C.W. 614 Alaska Glaciers. Taku glacier from outwash plain in of Norris glacier, about north, Southeastern Alaska. 1931. #1:/Alaska-Glaciers/wcw00615 ID. Wright, C.W. 615 Alaska Glaciers. Taku glacier, from outer part of outwash plain on the west side of upper Taku Inlet, view about north-northwest. Site of station NORRIS (VABM) on summit at left. Southeastern Alaska. 1931. #1:/Alaska-Glaciers/wcw00616 ID. Wright, C.W. 616 Alaska Glaciers. Norris glacier, Taku Inlet from outer part of outwash plain on the west side of Taku Inlet, view about west-southwest. Southeastern Alaska. 1931. #1:/Alaska-Glaciers/wcw00617 ID. Wright, C.W. 617 Alaska Glaciers. Davidson glacier on the west side of Chilkat Inlet, at head of Lynn Canal. View up glacier about southwest. Southeastern Alaska. 1931. #1:/Alaska-Glaciers/wcw00619 ID. Wright, C.W. 619 Alaska Glaciers. Davidson glacier on the west side of Chilkat Inlet, at head of Lynn Canal. View up glacier about west. Southeastern Alaska. 1931. #1:/Alaska-Glacier Bay/wcw00620 ID. Wright, C.W. 620 Glacier Bay National Park and Preserve, Alaska. South-southwest down Muir Inlet, from Wrights 1931, station 5, Casement glacier at left and Plateau Glacier at extreme right, mountains Case and Wright at left. Southeastern Alaska. 1931. #1:/Alaska-Glacier Bay/wcw00623 ID. Wright, C.W. 623 Glacier Bay National Park and Preserve, Alaska. Southwest to Plateau and Burroughs Glacier from Wrights 1931 Muir Inlet station 9, Muir Glacier at extreme right, panorama with wcw00624. 1931. #1:/Alaska-Glacier Bay/wcw00625 ID. Wright, C.W. 625 Glacier Bay National Park and Preserve, Alaska. Casement Glacier at right center and remnant of McBride glacier at right from Wright's 1931 Muir Inlet station 3, Red Mountain on left, and Mt. Case at extreme right, view about southwest. 1931. #1:/Alaska-Glacier Bay/wcw00636 ID. Wright, C.W. 636 Glacier Bay National Park and Preserve, Alaska. Up Tarr Inlet to Grand Pacific glacier (center) and Margerie glacier (left) from Wright's 1931 Tarr Inlet station 1, view about north-northwest. 1931. #1:/Alaska-Glacier Bay/wcw00652 ID. Wright, C.W. 652 Glacier Bay National Park and Preserve, Alaska. Charpentier Inlet and Charpentier glacier, from Wright's 1931 Hugh Miller Inlet station 13, view about south-southwest. #1:/Alaska-Glacier Bay/wcw00669 ID. Wright, C.W. 669 Glacier Bay National Park and Preserve, Alaska. Muir glacier from station 7. 1931. #1:/Alaska-Glacier Bay/wcw00670 ID. Wright, C.W. 670 Glacier Bay National Park and Preserve, Alaska. Mt. Wright and Muir Inlet, from station 10. 1931. #1:/Alaska-Glacier Bay/wcw00708 ID. Wright, C.W. 708 Glacier Bay National Park and Preserve, Alaska. Casement Glacier from station 5, Dr. Reid(?) seated at right in photo 708, two other members of the party in photo 709. #1:/Alaska-Glacier Bay/wcw00709 ID. Wright, C.W. 709 Glacier Bay National Park and Preserve, Alaska. Casement Glacier from station 5, Dr. Reid(?) seated at right in photo 708, two other members of the party in photo 709. #1:/Alaska-Glacier Bay/wcw00711 ID. Wright, C.W. 711 Glacier Bay National Park and Preserve, Alaska. West valley and northward to Favorite Inlet. 1931. #1:/Alaska-Glacier Bay/wcw00712 ID. Wright, C.W. 712 Glacier Bay National Park and Preserve, Alaska. Distant view of gravel benches in front of Morse Glacier, west side of Muir Inlet(?). 1931. #1:/Maine-Bulletin 376/bes00102 ID. Bastin, E.S. 102 Part of the Great Sidney bog, near Augusta, a typical moss heath, with scattered larches and spruces, showing also the auger used in making test borings. Kennebec County, Maine. 1906. Plate 3-B in U.S. Geological Survey. Bulletin 376. 1909. #1:/Maine-Bulletin 376/bes00104 ID. Bastin, E.S. 104 Fellows's experimental peat factory, Farwell bog near Lewiston, shows stock piles of crude peat and bricks of machine peat drying on rocks in the open air. The peat machine and gasoline engine are in the shed. Androscoggin County, Maine. 1906. Plate 3-A in U.S. Geological Survey. Bulletin 376. 1909. #1:/Idaho-Bulletin 384/cfc00007 ID. Calkins, F.C. 7 Part of shoreline of Lake Pend Oreille, Bonner County, Idaho. 1903. Plate 2-A in U.S. Geological Survey. Bulletin 384. 1909. #1:/Idaho-Bulletin 384/cfc00008 ID. Calkins, F.C. 8 Part of shoreline of Lake Pend Oreille, Bonner County, Idaho. 1903. Plate 2-B in U.S. Geological Survey. Bulletin 384. 1909. #1:/Wyoming-Bulletin 364/dnh01137 ID. Darton, N.H. 1137 Springs at fish hatchery, 8 miles south of Laramie, Albany County, Wyoming. 1905. Plate 7-B in U.S. Geological Survey. Bulletin 364. 1909. #1:/Wyoming-Bulletin 364/dnh01141 ID. Darton, N.H. 1141 Laramie Peak from the south. Two miles south of Garrett, Wyoming. 1905. Plate 2-A in U.S. Geological Survey. Bulletin 364. 1909. #1:/Wyoming-Bulletin 364/dnh01143 ID. Darton, N.H. 1143 Valley filled with Tertiary deposits at head of North Laramie River, summit of Laramie Mountains. Albany County, Wyoming. 1905. Plate 7-A in U.S. Geological Survey. Bulletin 364. 1909. #1:/Wyoming-Bulletin 364/dnh01146 ID. Darton, N.H. 1146 Sandstone in upper portion of Benton formation, northwest of Medicine Bow. Carbon County, Wyoming. 1905. Plate 6-B in U.S. Geological Survey. Bulletin 364. 1909. #1:/Oregon-Bulletin 387/dnh01162 ID. Darton, N.H. 1162 Lower quarry, near St. Helens, in andesite used for paving blocks and crushed rock. Columbia County, Oregon. 1907. Plate 4-A in U.S. Geological Survey. Bulletin 387. 1909. #1:/Oregon-Bulletin 387/dnh01164 ID. Darton, N.H. 1164 Upper quarry, crusher, and loading incline, south bank of Columbia River near St. Helens. Columbia County, Oregon. 1907. Plate 7-A in U.S. Geological Survey. Bulletin 387. 1909. #1:/Washington-Bulletin 387/dnh01165 ID. Darton, N.H. 1165 Quarry near Fishers Landing, Columbia River, shows loading incline. Clark County, Washington. 1907. Plate 7-B in U.S. Geological Survey. Bulletin 387. 1909. #1:/Washington-Bulletin 387/dnh01167 ID. Darton, N.H. 1167 Clay pit at Russell Landing, 4 miles above Vancouver; brick loam above terra-cotta clay. Clark County, Washington. 1907. Plate 8-A in U.S. Geological Survey. Bulletin 387. 1909. #1:/Oregon-Bulletin 387/dnh01168 ID. Darton, N.H. 1168 Gravel on Cornell Road, in northwest part of Portland, Multnomah County, Oregon. 1907. Plate 3-B in U.S. Geological Survey. Bulletin 387. 1909. #1:/Oregon-Bulletin 387/dnh01171 ID. Darton, N.H. 1171 River gravel and sand, east bank Willamette River, Portland. Multnomah County, Oregon. 1907. Plate 3-A in U.S. Geological Survey. Bulletin 387. 1909. #1:/Oregon-Bulletin 387/dnh01172 ID. Darton, N.H. 1172 Gravel and sand on east bank of Willamette River, Portland. Multnomah County, Oregon. 1907. Plate 4-B in U.S. Geological Survey. Bulletin 387. 1909. #1:/Washington-Bulletin 387/dnh01173 ID. Darton, N.H. 1173 Gravel pit in southern part of Tacoma, Pierce County, Washington. 1907. Plate 5-A in U.S. Geological Survey. Bulletin 387. 1909. #1:/Washington-Bulletin 387/dnh01174 ID. Darton, N.H. 1174 Gravel pit on Bellevue Avenue near Pike Street, Seattle, King County, Washington. 1907. Plate 5-B in U.S. Geological Survey. Bulletin 387. 1909. #1:/Washington-Bulletin 387/dnh01175 ID. Darton, N.H. 1175 Temporary gravel and sand pit, with screen, washer and bin, Boren Avenue near Pike Street, Seattle, King County, Washington. 1907. Plate 6 in U.S. Geological Survey. Bulletin 387. 1909. #1:/California-Bulletin 398/egh00004 ID. Eldridge, G.H. 4 Oil City field and ridge of the Coalinga anticline; looking east across Oil Canyon at hills of Cretaceous and Tertiary oil-bearing formations. Note gently dipping beds on left, overturned anticline in center, and steeply dipping beds along edge of Pleasant Valley on right. Fresno County, California. August 29, 1901. Plate 3 in U.S. Geological Survey. Bulletin 398. 1910. #1:/California-Bulletin 398/egh00005 ID. Eldridge, G.H. 5 Oil City field and ridge of the Coalinga anticline; looking east across Oil Canyon at hills of Cretaceous and Tertiary oil-bearing formations. Note gently dipping beds on left, overturned anticline in center, and steeply dipping beds along edge of Pleasant Valley on right. Fresno County, California. August 29, 1901. Plate 3 in U.S. Geological Survey. Bulletin 398. 1910. #1:/Alaska-Bulletin 358/knop0032 ID. Knopf, A. 32 Orbules in marble matrix, showing mode of orgin. Tin Creek. Nome district, Seward Peninsula region, Alaska 1908. Plate 6-B in U.S. Geological Survey. Bulletin 358. 1908. #1:/Alaska-Bulletin 358/knop0034 ID. Knopf, A. 34 Orbule produced by contact metamorphism. Tin Creek, granite contact. Nome district, Seward Peninsula region, Alaska 1908. Plate 4-A in U.S. Geological Survey. Bulletin 358. 1908. #1:/Alaska-Bulletin 358/knop0035 ID. Knopf, A. 35 Reverse side of orbule shown in kno00034. Tin Creek. Nome district, Seward Peninsula region, Alaska 1908. Plate 4-B in U.S. Geological Survey. Bulletin 358. 1908. #1:/Alaska-Bulletin 358/knop0036 ID. Knopf, A. 36 Irregular orbules. Tin Creek. Nome district, Seward Peninsula region, Alaska 1908. Plate 4-D in U.S. Geological Survey. Bulletin 358. 1908. #1:/Alaska-Bulletin 358/knop0037 ID. Knopf, A. 37 Maximum orbule; diameter 8 inches. Tin Creek. Nome district, Seward Peninsula region, Alaska 1908. Plate 4-C in U.S. Geological Survey. Bulletin 358. 1908. #1:/Alaska-Bulletin 358/knop0042 ID. Knopf, A. 42 Port Clarence Limestone near head of Cassiterite Creek, showing crumpled character of the argillaceous banded variety. Tin Creek. Nome district, Seward Peninsula region, Alaska 1908. Plate 2-B in U.S. Geological Survey. Bulletin 358. 1908. #1:/New Mexico-Bulletin 389/lwt00032 ID. Lee, W.T. 32 Saddle Peak in Fra Cristobal Mountains, showing the Yeso formation, overlain by the San Andreas limestone. Sierra County, New Mexico. 1905. Plate 4-B in U.S. Geological Survey. Bulletin 389. 1909. #1:/New Mexico-Bulletin 389/lwt00033 ID. Lee, W.T. 33 Western face of the Fra Cristobal Mountains, showing two faults, one near the base of the mountain on the left, the other at the upper elevation toward the right. Plate 5-A, with diagram, in U.S. Geological Survey. Bulletin 389. 1909. #1:/New Mexico-Bulletin 389/lwt00035 ID. Lee, W.T. 35 Fault plane at the western base of Fra Cristobal Mountains. Plate 5-B in U.S. Geological Survey. Bulletin 389. 1909. #1:/New Mexico-Bulletin 389/lwt00041 ID. Lee, W.T. 41 Mesa del Yeso, showing the character of the Yeso formation, DeBaca County, New Mexico. 1905. Plate 4-A in U.S. Geological Survey. Bulletin 389. 1909. #1:/New Mexico-Bulletin 389/lwt00052 ID. Lee, W.T. 52 Gypsum beds in Galiesto Canyon, showing the gypsum at the base of the Yeso formation, underlain by the Abo sandstone. Santa Fe County, New Mexico. 1905. Plate 3-B in U.S. Geological Survey. Bulletin 389. 1909. #1:/Utah-Bulletin 371/rgb00145 ID. Richardson, G.B. 145 Typical exposure of Mesaverde formation, 25 miles north of Thompsons (Thompson Spring). Grand County, Utah. 1906. Plate 5-A in U.S. Geological Survey. Bulletin 371. 1909. #1:/Utah-Bulletin 371/rgb00147 ID. Richardson, G.B. 147 Outcrop of coal in valley of Saleratus Creek. Utah. 1906. Plate 5-B in U.S. Geological Survey. Bulletin 371. 1909. #1:/Utah-Bulletin 371/rgb00155 ID. Richardson, G.B. 155 Bench at base of Book Cliffs east of Thompsons (Thompson Spring). Grand County, Utah. 1906. Plate 2-A in U.S. Geological Survey. Bulletin 371. 1909. #1:/Colorado-Bulletin 371/rgb00156 ID. Richardson, G.B. 156 Fault in Mesaverde formation, 2 miles south of Carbonera. Garfield County, Colorado. 1906. Plate 2-B in U.S. Geological Survey. Bulletin 371. 1909. #1:/Colorado-Bulletin 371/rgb0165a ID. Richardson, G.B. 165a Mount Garfield, 9 miles east of Grand Junction, shows weathering of Mancos shale at base of Book Cliffs, the "lower coal" occurs beneath the massive sandstone. Mesa County, Colorado. 1906. Plate 4 in U.S. Geological Survey. Bulletin 371. 1909. #1:/Colorado-Bulletin 371/rgb0167a ID. Richardson, G.B. 167a Little Book Cliffs and Grand (Colorado) River northeast of Palisades; the Cameo coal outcrops on the lowest wooded bench and the Palisades coal appears 450 feet lower, immediately below the lowest heavy sandstone. Mesa County, Colorado. 1906. Plate 7 in U.S. Geological Survey. Bulletin 371. 1909. #1:/Colorado-Bulletin 371/rgb0167b ID. Richardson, G.B. 167b Little Book Cliffs and Grand (Colorado) River northeast of Palisades; the Cameo coal outcrops on the lowest wooded bench and the Palisades coal appears 450 feet lower, immediately below the lowest heavy sandstone. Mesa County, Colorado. 1906. Plate 7 in U.S. Geological Survey. Bulletin 371. 1909. #1:/Alaska-Bulletin 374/sac00066 ID. Spencer, A.C. 66 Crumpling in thin-bedded Triassic limestone on ridge east of Gilahina creek. Chitina district, Copper River region, Alaska. 1900. Plate 4-B in U.S. Geological Survey. Bulletin 374. 1909. #1:/Alaska-Bulletin 374/sac00070 ID. Spencer, A.C. 70 Castle Mountain, looking N. 60 degrees W. from ridge between Gilahina and Lakina. Chitina district, Copper River district, Alaska. 1900. Plate 6-B in U.S. Geological Survey. Bulletin 374. 1909. #1:/Alaska-Bulletin 374/sac00100 ID. Spencer, A.C. 100 Nikolai vein and shaft. Nizina district, Copper River region, Alaska. 1900. Plate 9-A in U.S. Geological Survey. Bulletin 374. 1909. #1:/Alaska-Bulletin 374/sac00102 ID. Spencer, A.C. 102 Head of Nikolai Creek. Base of Kennicott formation in forground; Chugach Mountains in background. Nizina district, Copper River region, Alaska. 1900. Plate 5 in U.S. Geological Survey. Bulletin 374. 1909. #1:/Alaska-Bulletin 374/sac00115 ID. Spencer, A.C. 115 Contact of Chitistone limestone and Nikolai greenstone, east side of Nizina River about a mile below mouth of Chitistone River. Chitina district, Copper River district, Alaska. 1900. Plate 10-A in U.S. Geological Survey. Bulletin 374. 1909. #1:/Alaska-Bulletin 374/sac00116 ID. Spencer, A.C. 116 Contact if Nikolai greenstone and Chitistone limestone, west of Nizina River, near Nikolai mine. Nizina district, Copper River region, Alaska. 1900. Plate 3-A in U.S. Geological Survey. Bulletin 374. 1909. #1:/Alaska-Bulletin 374/sac00120 ID. Spencer, A.C. 120 Looking across Nizina River into valley of Dan creek, Chitistone limestone capping Nikolai greenstone on left; Triassic limestone-shale on right. Chitina district, Copper River district, Alaska. 1900. Plate 10-B in U.S. Geological Survey. Bulletin 374. 1909. #1:/Alaska-Bulletin 374/sac00126 ID. Spencer, A.C. 126 Pleistocene gravel bluffs, north bank of Chitina River, above mouth of Nizina River, looking northwest. Nizina district, Copper River region, Alaska. 1900. Plate 7-A in U.S. Geological Survey. Bulletin 374. 1909. #1:/Alabama-Bulletin 400/bef00333 ID. Burchard, E.F. 333 Face of cut at Houston Brown-ore mine, showing reef of folded Conasauga limestone; residual clay to left, ore to right, Reno, Tuscaloosa County, Alabama. 1906. Plate 13-B in U.S. Geological Survey. Bulletin 400. 1910. #1:/Alabama-Bulletin 400/bef00337 ID. Burchard, E.F. 337 Solid mass of ore at Houston Brown-ore mine. Tuscaloosa County, Alabama. 1906. Plate 13-C in U.S. Geological Survey. Bulletin 400. 1910. #1:/Alabama-Bulletin 400/bef00338 ID. Burchard, E.F. 338 Abandoned open cuts at Tannehill Brown-ore mine, showing pinnacles of Conasauga limestone and residual clay, from which ore has been stripped. Tuscaloosa County, Alabama. 1906. Plate 13-A in U.S. Geological Survey. Bulletin 400. 1910. #1:/Alabama-Bulletin 400/bef00344 ID. Burchard, E.F. 344 Upper workable part of Big Seam, in open-cut at Helen-Bess mine, shows jointing of ore bed. Jefferson County, Alabama. 1906. Plate 9-A in U.S. Geological Survey. Bulletin 400. 1910. #1:/Alabama-Bulletin 400/bef00345 ID. Burchard, E.F. 345 Upper workable part of Big Seam, in open-cut at Helen-Bess mine, shows jointing of ore bed. Jefferson County, Alabama. 1906. Plate 9-A in U.S. Geological Survey. Bulletin 400. 1910. #1:/Alabama-Bulletin 400/bef00349 ID. Burchard, E.F. 349 Upper two-thirds of Big Seam, Ruffner mine No. 1, showing drift in workable part. Jefferson County, Alabama. 1906. Plate 8-A in U.S. Geological Survey. Bulletin 400. 1910. #1:/Alabama-Bulletin 400/bef00359 ID. Burchard, E.F. 359 North incline at Valley View mine, showing drift headings, Jefferson County, Alabama. 1906. Plate 9-B in U.S. Geological Survey. Bulletin 400. 1910. #1:/Alabama-Bulletin 400/bef00360 ID. Burchard, E.F. 360 North incline at Valley View mine, showing drift headings, Jefferson County, Alabama. 1906. Plate 9-B in U.S. Geological Survey. Bulletin 400. 1910. #1:/Alabama-Bulletin 400/butc0134 ID. Butts, C. 134 Stewart washer of Central Iron and Coal Company at Kellerman, Tuscaloosa County, Alabama. 1906. Plate 16-A in U.S. Geological Survey. Bulletin 400. 1910. #1:/Alabama-Bulletin 400/butc0437 ID. Butts, C. 437 Red Mountain; seen from Chert ridge east of Grasselli, showing four slope mines of Fossil group, continuous open-cut workings or strippings, and location of ore-carrying railroad near Chickamauga-Clinton contact. Jefferson County, Alabama. 1906. Plate 10- A in U.S. Geological Survey. Bulletin 400. 1910. #1:/Alabama-Bulletin 400/butc0438 ID. Butts, C. 438 Red Mountain; seen from Chert ridge east of Grasselli, showing four slope mines of Fossil group, continuous open-cut workings or strippings, and location of ore-carrying railroad near Chickamauga-Clinton contact. Jefferson County, Alabama. 1906. Plate 10- A in U.S. Geological Survey. Bulletin 400. 1910. #1:/Alabama-Bulletin 400/butc0439 ID. Butts, C. 439 Red Mountain; seen from Chert ridge east of Grasselli, showing four slope mines of Fossil group, continuous open-cut workings or strippings, and location of ore-carrying railroad near Chickamauga-Clinton contact. Jefferson County, Alabama. 1906. Plate 10- A in U.S. Geological Survey. Bulletin 400. 1910. #1:/Alabama-Bulletin 400/butc0450 ID. Butts, C. 450 Tipple and mouth of slope of Alice mine (slope No. 7, Tennessee Coal, Iron and Railroad Company); plateau of the Warrior coalfield in distance, beyond Jones Valley. Jefferson County, Alabama. 1906. Plate 10-B in U.S. Geological Survey. Bulletin 400. 1910. #1:/Alabama-Bulletin 400/butc0451 ID. Butts, C. 451 Tipple and mouth of slope of Alice mine (slope No. 7, Tennessee Coal, Iron and Railroad Company); plateau of the Warrior coalfield in distance, beyond Jones Valley. Jefferson County, Alabama. 1906. Plate 10-B in U.S. Geological Survey. Bulletin 400. 1910. #1:/Alabama-Bulletin 400/butc0482 ID. Butts, C. 482 Blast furnace of Sloss-Sheffield Steel and Iron Company at North Birmingham. Jefferson County, Alabama. 1906. Plate 16-B in U.S. Geological Survey. Bulletin 400. 1910. #1:/Alabama-Bulletin 400/butc0515 ID. Butts, C. 515 Red Gap at Gate City, looking eastward to Birmingham. Jefferson County, Alabama. 1906. Plate 4-A in U.S. Geological Survey. Bulletin 400. 1910. #1:/Alabama-Bulletin 400/butc0519 ID. Butts, C. 519 Anticline overturned to northwest, Louisville and Nashville Railroad, one-half mile south of Graces Gap. Jefferson County, Alabama. 1906. Plate 4-B in U.S. Geological Survey. Bulletin 400. 1910. #1:/Vermont-Bulletin 404/dtn00228 ID. Dale, T.N. 228 Statue of Robert Burns at Barre, showing adaptability of "Barre Granite" to sculpture. Washington County, Vermont. 1907. Plate 3-A in U.S. Geological Survey. Bulletin 404. 1909. Plate 5-A in U.S. Geological Survey. Bulletin 738. 1923. #1:/Vermont-Bulletin 404/dtn00230 ID. Dale, T.N. 230 Sheet structure at Fletcher quarry on Robeson Mountain, Woodbury, looking southwest. One set of sheets curves southeasterly, dipping as high as 30 degrees; another set of sheets or close joints intersect the first, dipping 5-10 degrees, S. 70 degrees W. Washington County, Vermont. 1907. Plate 4-B in U.S. Geological Survey. Bulletin 404. 1909. Plate 6-B in U.S. Geological Survey. Bulletin 738. 1923. #1:/Vermont-Bulletin 404/dtn00235 ID. Dale, T.N. 235 Sheet structure at southwest foot of Black Mountain in Dummerston ("Black Mountain quarry"), the sheets in the working face are thin and nearly horizontal; those higher up the dome are thicker and dip 30-40 degrees west. Windham County, Vermont. 1907. Plate 3-B in U.S. Geological Survey. Bulletin 404. 1909. #1:/Vermont-Bulletin 404/dtn00242 ID. Dale, T.N. 242 Mica schist with granite injections, specimen at left (6 by 5 inches) from under side of large inclusions at Boutwell quarry, Barre, shows light granite bands alternating with dark bands of schist parallel to its foliation. Specimen at right (8.5 by 3 inches) from the edge of inclusions at Morrison quarry South Ryegate, the light granite forms lenses in the schist foliation. Caledonia County, or Washington County, Vermont. 1907. Plate 2-B in U.S. Geological Survey. Bulletin 404. 1909. Plate 3-B in U.S. Geological Survey. Bulletin 738. 1923. #1:/Vermont-Bulletin 404/dtn00243 ID. Dale, T.N. 243 Nodular granite, Ellis quarry, Bethel, the nodules are mainly muscovite, generally corrugated, and lie with their major axes in the plane of flow structure. Windsor County, Vermont. 1907. Plate 2-A in U.S. Geological Survey. Bulletin 404. 1909. Plate 3-A in U.S. Geological Survey. Bulletin 738. 1923. #1:/New York-Bulletin 404/dtn0322a ID. Dale, T.N. 322a Carved eagle of coarse white quartz monzonite from Bethel over entrance to American Banknote Company's building, New York; Spread of wings 32 inches; height from base of medallion to top of head 7 feet 8 inches; depth of carving 18 inches. The whiteness of the cut rock has counteracted the effect of the coarseness. New York.1907. Plate 5-A in U.S. Geological Survey. Bulletin 404. 1909. Plate 7-A in U.S. Geological Survey. Bulletin 738. 1923. #1:/Vermont-Bulletin 404/dtn0324a ID. Dale, T.N. 324a Monument of Mount Ascutney dark-green hornblende –augite granite (syenite), showing contrast between polished (black) and hammered (white) surfaces. Size about 5 feet 8 inches by 2 feet 6 inches. Vermont. 1907. Plate 2-A in U.S. Geological Survey. Bulletin 404. 1909. Plate 7-B in U.S. Geological Survey. Bulletin 738. 1923. #1:/Nevada-Bulletin 407/rfl00631 ID. Ransome, F.L. 631 Ladd Mountain and the town of Rhyolite from the northwest, beyond Ladd Mountain, to the left is Bare Mountain. To the right is the Amargosa Desert. Nye County, Nevada. 1906. Plate 11-A in U.S. Geological Survey. Bulletin 407. 1910. #1:/Nevada-Bulletin 407/rfl00633 ID. Ransome, F.L. 633 Saddle between Sutherland Mountain and Busch Peak, from the southeast, showing the Saddle fault with downthrow on the right, the dark flow of basalt No. 2 is cut obliquely by the Denver fault at the right of the illustration. Nye County, Nevada. 1906. Plate 8-A in U.S. Geological Survey. Bulletin 407. 1910. #1:/Nevada-Bulletin 407/rfl00634 ID. Ransome, F.L. 634 Rainbow Mountain from the Hobo shaft on Bonanza Mountain. The highest point is Black Peak, capped with quartz latite. The Montgomery-Shoshone mine is in the saddle at the right. Nye County, Nevada. 1906. Plate 3-A in U.S. Geological Survey. Bulletin 407. 1910. #1:/Nevada-Bulletin 407/rfl00645 ID. Ransome, F.L. 645 To the east from the Montgomery-Shoshone mine, on the left is Burton Mountain, in which rhyolites Nos. 11, 12, and 13 are repeated by a strike fault. The high hills to the right are part of Bare Mountain. Nye County, Nevada. 1906. Plate 3-B in U.S. Geological Survey. Bulletin 407. 1910. #1:/Nevada-Bulletin 407/rfl00651 ID. Ransome, F.L. 651 Montgomery-Shoshone fault, the observer is looking northeast alone the line of the fault, which passes through the saddle. The light rock on the left is rhyolite No. 16, above which is basalt No. 5 and quartz latite. On the right is rhyolite No. 10. Nye County, Nevada. 1906. Plate 9-B in U.S. Geological Survey. Bulletin 407. 1910. #1:/Nevada-Bulletin 407/rfl00652 ID. Ransome, F.L. 652 Panoramic view of the Bullfrog Hills from a point 2 miles south of Beatty, the distant mountain to the left are the Grapevine Mountains, nearly due west of the observer; behind them is Death Valley. The hills geologically mapped occupied the upper half (photo) of the panorama. Due north of the observer is Beatty, on Amargosa River, which appears also the extreme right of the lower half (photos Ransome 655 and 656) of the panorama. East of the stream are the northern foothills of Bare Mountain. The relatively smooth, rounded hills in the foreground are composed of pre-Tertiary rocks. Nye County, Nevada. 1906. Plate 3, upper photo, in U.S. Geological Survey. Bulletin 407. 1910. #1:/Nevada-Bulletin 407/rfl00653 ID. Ransome, F.L. 653 Panoramic view of the Bullfrog Hills from a point 2 miles south of Beatty, the distant mountain to the left are the Grapevine Mountains, nearly due west of the observer; behind them is Death Valley. The hills geologically mapped occupied the upper half (photo) of the panorama. Due north of the observer is Beatty, on Amargosa River, which appears also the extreme right of the lower half (photos Ransome 655 and 656) of the panorama. East of the stream are the northern foothills of Bare Mountain. The relatively smooth, rounded hills in the foreground are composed of pre-Tertiary rocks. Nye County, Nevada. 1906. Plate 3, upper photo, in U.S. Geological Survey. Bulletin 407. 1910. #1:/Nevada-Bulletin 407/rfl00654 ID. Ransome, F.L. 654 Panoramic view of the Bullfrog Hills from a point 2 miles south of Beatty, the distant mountain to the left are the Grapevine Mountains, nearly due west of the observer; behind them is Death Valley. The hills geologically mapped occupied the upper half (photo) of the panorama. Due north of the observer is Beatty, on Amargosa River, which appears also the extreme right of the lower half (photos Ransome 655 and 656) of the panorama. East of the stream are the northern foothills of Bare Mountain. The relatively smooth, rounded hills in the foreground are composed of pre-Tertiary rocks. Nye County, Nevada. 1906. Plate 3, upper photo, in U.S. Geological Survey. Bulletin 407. 1910. #1:/Nevada-Bulletin 407/rfl00655 ID. Ransome, F.L. 655 Panoramic view of the Bullfrog Hills from a point 2 miles south of Beatty, the distant mountain to the left are the Grapevine Mountains, nearly due west of the observer; behind them is Death Valley. The hills geologically mapped occupied the upper half (Ransome photos 652 thru 654) of the panorama. Due north of the observer is Beatty, on Amargosa River, which appears also the extreme right of the lower half (photos Ransome 655 and 656) of the panorama. East of the stream are the northern foothills of Bare Mountain. The relatively smooth, rounded hills in the foreground are composed of pre- Tertiary rocks. Nye County, Nevada. 1906. Plate 3, lower photo, in U.S. Geological Survey. Bulletin 407. 1910. #1:/Nevada-Bulletin 407/rfl00656 ID. Ransome, F.L. 656 Panoramic view of the Bullfrog Hills from a point 2 miles south of Beatty, the distant mountain to the left are the Grapevine Mountains, nearly due west of the observer; behind them is Death Valley. The hills geologically mapped occupied the upper half (Ransome photos 652 thru 654) of the panorama. Due north of the observer is Beatty, on Amargosa River, which appears also the extreme right of the lower half (photos Ransome 655 and 656) of the panorama. East of the stream are the northern foothills of Bare Mountain. The relatively smooth, rounded hills in the foreground are composed of pre- Tertiary rocks. Nye County, Nevada. 1906. Plate 3, lower photo, in U.S. Geological Survey. Bulletin 407. 1910. #1:/Nevada-Bulletin 407/rfl00657 ID. Ransome, F.L. 657 Bullfrog Mountain from the south. The low hills in the foreground are composed of limestone and shale, against which the volcanic flows forming the mass of the mountain are faulted. The Original Bullfrog vein outcrops along the face of the rounded hill in the left middle distance. Nye County, Nevada. 1906. Plate 9-A in U.S. Geological Survey. Bulletin 407. 1910. #1:/Nevada-Bulletin 407/rfl00662 ID. Ransome, F.L. 662 Fault on south slope of hill south of Sawtooth Mountain. Nye County, Nevada. 1906. Plate 8-B in U.S. Geological Survey. Bulletin 407. 1910. #1:/Nevada-Bulletin 407/rfl00671 ID. Ransome, F.L. 671 Shaly variety of rhyolite No. 1 west slope of Sutherland Mountain. Nye County, Nevada. 1906. Plate 5-B in U.S. Geological Survey. Bulletin 407. 1910. #1:/Nevada-Bulletin 407/rfl00672 ID. Ransome, F.L. 672 Apparent bedding in rhyolite No.1 northwest of Buck Spring. Nye County, Nevada. 1906. Plate 6-A in U.S. Geological Survey. Bulletin 407. 1910. #1:/Nevada-Bulletin 407/rfl00673 ID. Ransome, F.L. 673 Nearer view of part of Ransome, photo 685, showing arkose-like texture, due to close crowding of feldspars. Nye County, Nevada. 1906. Plate 6-B in U.S. Geological Survey. Bulletin 407. 1910. #1:/Nevada-Bulletin 407/rfl00674 ID. Ransome, F.L. 674 An inclusion of basalt in rhyolite No. 6 in the saddle between Sutherland Mountain and Busch Peak. Nye County, Nevada. 1906. Plate 7-B in U.S. Geological Survey. Bulletin 407. 1910. #1:/Nevada-Bulletin 407/rfl00677 ID. Ransome, F.L. 677 Pit on Hobo vein and fault fissure, show superficial overturning of the soft, crushed material by downhill creep. Nye County, Nevada. 1906. Plate 11-B in U.S. Geological Survey. Bulletin 407. 1910. #1:/Nevada-Bulletin 407/rfl00678 ID. Ransome, F.L. 678 Interbedded quartzite and mica schist south of Beatty, showing divergence of schistosity and bedding. Nye County, Nevada. 1906. Plate 4-B in U.S. Geological Survey. Bulletin 407. 1910. #1:/Nevada-Bulletin 407/rfl00679 ID. Ransome, F.L. 679 Interbedded schist and quartzite south of Beatty, showing parallelism of schistosity and bedding. Nye County, Nevada. 1906. Plate 5-A in U.S. Geological Survey. Bulletin 407. 1910. #1:/Nevada-Bulletin 407/rfl00681 ID. Ransome, F.L. 681 Banded quartz of the original Bullfrog vein. Nye County, Nevada. 1906. Plate 12-A in U.S. Geological Survey. Bulletin 407. 1910. #1:/Nevada-Bulletin 407/rfl00682 ID. Ransome, F.L. 682 Shattered and veined rhyolite, original Bullfrog mine. Nye County, Nevada. 1906. Plate 12-B in U.S. Geological Survey. Bulletin 407. 1910. #1:/Nevada-Bulletin 407/rfl00683 ID. Ransome, F.L. 683 Spherulites in rhyolite No. 5 on Sawtooth Mountain. Nye County, Nevada. 1906. Plate 7-A in U.S. Geological Survey. Bulletin 407. 1910. #1:/Nevada-Bulletin 407/rfl00685 ID. Ransome, F.L. 685 Metamorphosed limestone in schists 2 miles south of Beatty, Nye County, Nevada. 1906. Plate 4-A in U.S. Geological Survey. Bulletin 407. 1910. #1:/Maine-Bulletin 420/bes00095 ID. Bastin, E.S. 95 Flat-lying or sill-like dike in pegmatite intruding gently inclined sedimentary schists, bed of Androscogin River, between railway and highway bridges, Auburn-Lewiston; showing lens-like form characteristic of many of these pegmatite masses. Androscoggin County, Maine. 1906. Plate 2-B in U.S. Geological Survey. Bulletin 420. 1910. #1:/Connecticut-Bulletin 420/bes00141 ID. Bastin, E.S. 141 Crystal of microcline feldspar in Roaring Creek, feldspar quarry; crystal faces painted for photographing. Front face is the b-pinacoid. Hammer rests on c-pinacoid. The crystal was originally entirely inclosed by pegmatite. Connecticut. 1906. Plate 5-A in U.S. Geological Survey. Bulletin 420. 1910. #1:/Connecticut-Bulletin 420/bes00142 ID. Bastin, E.S. 142 Quartz dike cutting pegmatite at Howe quarry, South Glastonbury, showing light colored feldspar crystals with well-developed crystal faces projecting into the quartz of the dike. The quartz appears dark colored in the photograph. Hartford County, Connecticut. 1906. Plate 7-B in U.S. Geological Survey. Bulletin 420. 1910. #1:/Connecticut-Bulletin 420/bes00143 ID. Bastin, E.S. 143 Vertical pegmatite dike intruded along fracture plane in granite gneiss at feldspar quarry near East Glastonbury. Hartford County, Connecticut. 1906. Plate 7-A in U.S. Geological Survey. Bulletin 420. 1910. #1:/Maine-Bulletin 420/bes00146 ID. Bastin, E.S. 146 Intergrowths of feldspar and quartz showing characteristic graphic granite structure, natural size; coarse graphic granite from Topsham, Sagadahoc County, Maine. 1906. Plate 3-C in U.S. Geological Survey. Bulletin 420. 1910. #1:/Maine-Bulletin 420/bes00168 ID. Bastin, E.S. 168 Highly inclined dike of pegmatite in schists at Pemaquid Point, showing characteristic swelling and pinching of such dikes. Lincoln County, Maine. 1906. Plate 2-A in U.S. Geological Survey. Bulletin 420. 1910. #1:/Maine-Bulletin 420/bes00191 ID. Bastin, E.S. 191 Intergrowths of feldspar and quartz showing characteristic graphic granite structure, natural size; fine graphic granite from Topsham, Sagadahoc County, Maine. 1906. Plate 3-B in U.S. Geological Survey. Bulletin 420. 1910. #1:/New York-Bulletin 420/bes00193 ID. Bastin, E.S. 193 Intergrowths of feldspar and quartz showing characteristic graphic granite structure: natural size; graphic granite from Bedford, Westchester County, New York. 1908. Plate 3-A in U.S. Geological Survey. Bulletin 420. 1910. #1:/Colorado-Bulletin 415/ghs00162 ID. Gale, H.S. 162 Coal bearing strata in White River Canyon, 4 miles west of Meeker. Rio Blanco County, Colorado. 1906. Plate 14-B in U.S. Geological Survey. Bulletin 415. 1910. #1:/Colorado-Bulletin 415/ghs00163 ID. Gale, H.S. 163 Coal bearing strata in White River Canyon, 4 miles west of Meeker. Rio Blanco County, Colorado. 1906. Plate 14-B in U.S. Geological Survey. Bulletin 415. 1910. #1:/Colorado-Bulletin 415/ghs00197 ID. Gale, H.S. 197 Detail of Wasatch exposures at base of Escarpment Peak. Moffat County, Colorado. 1906. Plate 8-B in U.S. Geological Survey. Bulletin 415. 1910. #1:/Colorado-Bulletin 415/ghs00198 ID. Gale, H.S. 198 Detail of Wasatch exposures at base of Escarpment Peak. Moffat County, Colorado. 1906. Plate 8-B in U.S. Geological Survey. Bulletin 415. 1910. #1:/Colorado-Bulletin 415/ghs00200 ID. Gale, H.S. 200 Escarpment Peak as seen from Keystone Reservoir Basin. Moffat County, Colorado. 1906. Plate 8-A in U.S. Geological Survey. Bulletin 415. 1910. #1:/Colorado-Bulletin 415/ghs00201 ID. Gale, H.S. 201 Escarpment Peak as seen from Keystone Reservoir Basin. Moffat County, Colorado. 1906. Plate 8-A in U.S. Geological Survey. Bulletin 415. 1910. #1:/Colorado-Bulletin 415/ghs00209 ID. Gale, H.S. 209 Milk Creek valley in Axial Basin, showing escarpments of Iles and Duffy Mountains. Moffat County, Colorado. 1906. Plate 2-A in U.S. Geological Survey. Bulletin 415. 1910. #1:/Colorado-Bulletin 415/ghs00210 ID. Gale, H.S. 210 Milk Creek valley in Axial Basin, showing escarpments of Iles and Duffy Mountains. Moffat County, Colorado. 1906. Plate 2-A in U.S. Geological Survey. Bulletin 415. 1910. #1:/Colorado-Bulletin 415/ghs00221 ID. Gale, H.S. 221 Thornburgh Mountain from a point overlooking the "Battleground", showing escarpment of basal Mesaverde rocks. Moffat County, Colorado. 1906. Plate 5-A in U.S. Geological Survey. Bulletin 415. 1910. #1:/Colorado-Bulletin 415/ghs00222 ID. Gale, H.S. 222 Thornburgh Mountain from a point overlooking the "Battleground", showing escarpment of basal Mesaverde rocks. Moffat County, Colorado. 1906. Plate 5-A in U.S. Geological Survey. Bulletin 415. 1910. #1:/Colorado-Bulletin 415/ghs00223 ID. Gale, H.S. 223 Thornburgh Mountain from a point overlooking the "Battleground", showing escarpment of basal Mesaverde rocks. Moffat County, Colorado. 1906. Plate 5-A in U.S. Geological Survey. Bulletin 415. 1910. #1:/Colorado-Bulletin 415/ghs00244 ID. Gale, H.S. 244 Unconformity in the pre-Cretaceous rocks on White River above Agency Park. Rio County, Colorado. 1907. Plate 3-B in U.S. Geological Survey. Bulletin 415. 1910. #1:/Colorado-Bulletin 415/ghs00260 ID. Gale, H.S. 260 Summit of Grand Hogback overlooking gap of Piceance Creek. Garfield County, Colorado. 1906. Plate 5-B in U.S. Geological Survey. Bulletin 415. 1910. #1:/Colorado-Bulletin 415/ghs00261 ID. Gale, H.S. 261 Summit of Grand Hogback overlooking gap of Piceance Creek. Garfield County, Colorado. 1906. Plate 5-B in U.S. Geological Survey. Bulletin 415. 1910. #1:/Colorado-Bulletin 415/ghs00262 ID. Gale, H.S. 262 Summit of Grand Hogback overlooking gap of Piceance Creek. Garfield County, Colorado. 1906. Plate 5-B in U.S. Geological Survey. Bulletin 415. 1910. #1:/Colorado-Bulletin 415/ghs00269 ID. Gale, H.S. 269 Coal entry at Harvey Gap, exposure of the coals in the Grand Hogback, field. Garfield County, Colorado. 1906. Plate 12-A in U.S. Geological Survey. Bulletin 415. 1910. #1:/Colorado-Bulletin 415/ghs00272 ID. Gale, H.S. 272 Hayden Monument Peak from Piceance Creek Valley at "Dinner Station", Sec. 4, T. 4 S., R. 94 W. Rio Blanco County, Colorado. 1906. Plate 14-A in U.S. Geological Survey. Bulletin 415. 1910. #1:/Colorado-Bulletin 415/ghs00273 ID. Gale, H.S. 273 Hayden Monument Peak from Piceance Creek Valley at "Dinner Station", Sec. 4, T. 4 S., R. 94 W. Rio Blanco County, Colorado. 1906. Plate 14-A in U.S. Geological Survey. Bulletin 415. 1910. #1:/Colorado-Bulletin 415/ghs00280 ID. Gale, H.S. 280 Mesaverde section at Newcastle, Garfield County, Colorado. 1906. Plate 11-A in U.S. Geological Survey. Bulletin 415. 1910. #1:/Colorado-Bulletin 415/ghs00281 ID. Gale, H.S. 281 Mesaverde section at Newcastle, Garfield County, Colorado. 1906. Plate 11-A in U.S. Geological Survey. Bulletin 415. 1910. #1:/Colorado-Bulletin 415/ghs00301 ID. Gale, H.S. 301 Blevins mine on Lay Creek, Yampa field, Moffat County, Colorado. 1906. Plate 12-B in U.S. Geological Survey. Bulletin 415. 1910. #1:/Colorado-Bulletin 415/ghs00320 ID. Gale, H.S. 320 Rim-Rock Ledge at mouth of Wolf Creek, lower White River. Rio Blanco County, Colorado. 1907. Plate 2-B in U.S. Geological Survey. Bulletin 415. 1910. #1:/Colorado-Bulletin 415/ghs00321 ID. Gale, H.S. 321 Rim-Rock Ledge at mouth of Wolf Creek, lower White River. Rio Blanco County, Colorado. 1907. Plate 2-B in U.S. Geological Survey. Bulletin 415. 1910. #1:/Colorado-Bulletin 415/ghs00329 ID. Gale, H.S. 329 Cross-bedding in white cliff sandstone on Skull Creek, south of Blue Mountain. Moffat County, Colorado. 1906. Plate 3-A in U.S. Geological Survey. Bulletin 415. 1910. #1:/Colorado-Bulletin 415/ghs00350 ID. Gale, H.S. 350 Natural monument typical of weathering of the Mesaverde and lower sandstones of the Wasatch formation in the region south of Raven Park. Rio Blanco County, Colorado. 1907. Plate 7-A in U.S. Geological Survey. Bulletin 415. 1910. #1:/Utah-Bulletin 415/ghs00396 ID. Gale, H.S. 396 Concretion typical of a sandstone stratum overlying the Mancos coal of the Vernal field. Uintah County, Utah. 1907. Plate 22-B in U.S. Geological Survey. Bulletin 415. 1910. #1:/Utah-Bulletin 415/ghs00397 ID. Gale, H.S. 397 Coal bearing strata in lower part of Mancos shale at the Bowen mine on Brush Creek, Vernal field. Uintah County, Utah. 1907. Plate 22-A in U.S. Geological Survey. Bulletin 415. 1910. #1:/Utah-Bulletin 415/ghs00409 ID. Gale, H.S. 409 Escarpment of Shinarump group in the Green River canyon near Flaming Gorge. Daggett County, Utah. 1907. Plate 7-B in U.S. Geological Survey. Bulletin 415. 1910 #1:/Wyoming-Bulletin 415/ghs00412 ID. Gale, H.S. 412 Badland topography of the Bridger formation, north side of Henrys Fork, Sweetwater County, Wyoming. 1907. Plate 9 in U.S. Geological Survey. Bulletin 415. 1910 #1:/California-Bulletin 413/hfl00258 ID. Hess, F.L. 258 Gypsum deposit 4 miles northeast of Coalinga. Fresno County, California. 1906. Plate 2- B in U.S. Geological Survey. Bulletin 413. 1910. #1:/California-Bulletin 413/hfl00265 ID. Hess, F.L. 265 "The Oil Bubble" in the Lost Hills south of Tulare Lake, a mound of gypsum, made by the evaporation of water seeping from the rocks below. Kern County, California. 1906. Plate 2-A in U.S. Geological Survey. Bulletin 413. 1910. #1:/California-Bulletin 413/hfl00273 ID. Hess, F.L. 273 Gypsum deposits in bed of periodic lake at Amboy. The gypsum is dragged onto the platform by the horse scraper and dumped on to the tramcars beneath. San Bernardino County, California. 1906. Plate 3-A in U.S. Geological Survey. Bulletin 413. 1910. #1:/California-Bulletin 413/hfl00289 ID. Hess, F.L. 289 Gypsite deposit 9 feet thick on brow of hill, 1.25 miles southwest of Palmdale. Los Angeles County, California. 1906. Plate 3-B in U.S. Geological Survey. Bulletin 413. 1910. #1:/California-Bulletin 413/hfl00291 ID. Hess, F.L. 291 Gypsum interbedded with clay shales 1.25 miles southwest of Palmdale. Los Angeles County, California. 1906. Plate 4-B in U.S. Geological Survey. Bulletin 413. #1:/Texas-Bulletin 405/swt00225 ID. Schaller, W.T. 225 Montroydite specimen. Brewster County, Texas. 1905. Plate 2 in U.S. Geological Survey. Bulletin 405. 1909. #1:/Texas-Bulletin 405/swt00226 ID. Schaller, W.T. 226 Basal section of kleinite showing optical unhomogenity; nicols not crossed. Brewster County, Texas. 1905. Plate 1-A in U.S. Geological Survey. Bulletin 405. 1909. #1:/Texas-Bulletin 405/swt00227 ID. Schaller, W.T. 227 Basal section of kleinite showing optical unhomogenity; nicols crossed. Brewster County, Texas. 1905. Plate 1-B in U.S. Geological Survey. Bulletin 405. 1909. #1:/Texas-Bulletin 405/swt00228 ID. Schaller, W.T. 228 Basal section of kleinite showing optical unhomogenity; nicols crossed, after the section had been heated to 150 degrees and allowed to cool. Brewster County, Texas. 1905. Plate 1-C in U.S. Geological Survey. Bulletin 405. 1909. #1:/Alaska-Bulletin 433/sps00093 ID. Smith, P.S. 93 Ice underlying vegetation, Spruce Creek Council district, Seward Peninsula region, Alaska. 1907. Plate 12-A in U.S. Geological Survey. Bulletin 433. 1910. #1:/Alaska-Bulletin 433/sps00109 ID. Smith, P.S. 109 Greenstone and schist contact, Victoria Creek Council district, Seward Peninsula region, Alaska. 1907. Plate 8-A in U.S. Geological Survey. Bulletin 433. 1910. #1:/Alaska-Bulletin 433/sps00111 ID. Smith, P.S. 111 Cleavage in schists, Victoria Creek. Council district, Seward Peninsula region, Alaska. 1907. Plate 11-B in U.S. Geological Survey. Bulletin 433. 1910. #1:/Alaska-Bulletin 433/sps00129 ID. Smith, P.S. 129 Lower Casadepaga valley, Mount Dixon in background Council district, Seward Peninsula region, Alaska. 1907. Plate 15-A in U.S. Geological Survey. Bulletin 433. 1910. #1:/Alaska-Bulletin 433/sps00131 ID. Smith, P.S. 131 Bench of Casadepaga River between Thorp and Big Four Creeks, Council district, Seward Peninsula region, Alaska. 1907. Plate 11-A in U.S. Geological Survey. Bulletin 433. 1910. #1:/Alaska-Bulletin 433/sps00189 ID. Smith, P.S. 189 Fold on Shovel Creek. Council district, Seward Peninsula region, Alaska. 1907. Plate 13- A in U.S. Geological Survey. Bulletin 433. 1910. #1:/Alaska-Bulletin 433/sps00190 ID. Smith, P.S. 190 Broad valley of Shovel Creek, near West Creek. Council district, Seward Peninsula region, Alaska. 1907. Plate 1-B in U.S. Geological Survey. Bulletin 433. 1910. #1:/Alaska-Bulletin 433/sps00213 ID. Smith, P.S. 213 Big Hurrah mine, from Huff Creek. Council district, Seward Peninsula region, Alaska. 1907. Plate 15-B in U.S. Geological Survey. Bulletin 433. 1910. #1:/Alaska-Bulletin 433/sps00223 ID. Smith, P.S. 223 Fold on Goodenough Creek Council district, Seward Peninsula region, Alaska. 1907. Plate 14 in U.S. Geological Survey. Bulletin 433. 1910. #1:/Alaska-Bulletin 433/sps00226 ID. Smith, P.S. 226 Limestone horses in greenstone. Council district, Seward Peninsula region, Alaska. 1907. Plate 8-B in U.S. Geological Survey. Bulletin 433. 1910. #1:/Alaska-Bulletin 433/sps00231 ID. Smith, P.S. 231 Hurrah slate near head of Big Four Creek. Council district, Seward Peninsula region, Alaska. 1907. Plate 5 in U.S. Geological Survey. Bulletin 433. 1910. #1:/Alaska-Bulletin 433/sps00242 ID. Smith, P.S. 242 Schist pinnacle and talus, east of Monument Creek. Council district, Seward Peninsula region, Alaska. 1907. Plate 10-A in U.S. Geological Survey. Bulletin 433. 1910. #1:/Alaska-Bulletin 433/sps00247 ID. Smith, P.S. 247 Sowik limestone on Shovel Creek, north of Kasson Creek, Council district, Seward Peninsula region, Alaska. 1907. Plate 1-A in U.S. Geological Survey. Bulletin 433. 1910. #1:/Alaska-Bulletin 433/sps00256 ID. Smith, P.S. 256 Specimen: Folded and sheared quartz vein. Alaska. 1907. Plate 9-A in U.S. Geological Survey. Bulletin 433. 1910. #1:/Alaska-Bulletin 433/sps00273 ID. Smith, P.S. 273 Ice under creek gravels, Lost Creek. Council district, Seward Peninsula region, Alaska. 1907. Plate 12-B in U.S. Geological Survey. Bulletin 433. 1910. #1:/Alaska-Bulletin 433/sps00279 ID. Smith, P.S. 279 Unconformity on west slopes of 1,770-foot hill near Bonanza Creek. Council district, Seward Peninsula region, Alaska. 1907. Plate 13-B in U.S. Geological Survey. Bulletin 433. 1910. #1:/Maine-Bulletin 445/bes00068 ID. Bastin, E.S. 68 Muscovite-rich zones in pegmatite, G.D. Willes Feldspar quarry, Topsham Sagadahoc County, Maine. 1906. Plate 9-A in U.S. Geological Survey. Bulletin 445. 1911. #1:/Maine-Bulletin 445/bes00080 ID. Bastin, E.S. 80 Deflection of schist folia along the immediate contact with a pegmatite dike, 2.5 miles northeast of Paris village, Oxford County, Maine. 1906. Plate 10-A in U.S. Geological Survey. Bulletin 445. 1911. #1:/Maine-Bulletin 445/bes00085 ID. Bastin, E.S. 85 Development of feldspar crystals in schist near pegmatite, Rumford Falls. Oxford County, Maine. 1906. Plate 10-B in U.S. Geological Survey. Bulletin 445. 1911. #1:/Maine-Bulletin 445/bes00092 ID. Bastin, E.S. 92 Network of diabase dikes cutting pegmatite and associated gneiss at Keewaydin Lake in Stoneham. Oxford County, Maine. 1906. Plate 16-A in U.S. Geological Survey. Bulletin 445. 1911 #1:/Maine-Bulletin 445/bes00124 ID. Bastin, E.S. 124 General view of the tourmaline quarry at Mount Mica in November 1908, looking west, the upper layers of rock in the middle ground are the schist capping. In the foreground is the gigantic pocket shown Bastin 125. The rock at the right is waste, piled in the worked out portion of the pit. Oxford County, Maine. Plate 11 in U.S. Geological Survey. Bulletin 445. 1911. #1:/Maine-Bulletin 445/bes00125 ID. Bastin, E.S. 125 Largest pocket ever found at Mount Mica. This pocket measures 20 by 12 by 7 feet and contains three connecting chambers. Mr. Merrill at the right. Oxford County, Maine. Plate 13 in U.S. Geological Survey. Bulletin 445. 1911. #1:/Maine-Bulletin 445/bes00144 ID. Bastin, E.S. 144 Muscovite from Topsham, showing wedge structure; front view. Sagadahoc County, Maine. 1906. Plate 19-A in U.S. Geological Survey. Bulletin 445. 1911. #1:/Maine-Bulletin 445/bes00194 ID. Bastin, E.S. 194 Photomicrograph of graphic granite from Topsham; magnified about 34 times. Note the abrupt termination of areas of graphic intergrowth against areas of pure feldspar, even where the feldspar is crystallographically continuous from one to the other. Sagadahoc County, Maine. 1906. Plate 8 in U.S. Geological Survey. Bulletin 445. 1911. #1:/Maine-Bulletin 445/bes00225 ID. Bastin, E.S. 225 Largest crystal of tourmaline ever found at Mount Mica, length 15.5 inches; maximum width, 7 inches; weight 31.5 pounds. Oxford County, Maine. Plate 14 in U.S. Geological Survey. Bulletin 445. 1911. #1:/Maine-Bulletin 445/bes00226 ID. Bastin, E.S. 226 Large single crystal of tourmaline from Mount Mica, natural size, from the same pocket a the giant tourmaline shown in Bastin 225; bar scale equals 1 inch. Oxford County, Maine. Plate 15 in U.S. Geological Survey. Bulletin 445. 1911. #1:/Maine-Bulletin 445/bes00228 ID. Bastin, E.S. 228 Reproduction of an old photograph of the Mount Mica tourmaline mine at the time when the pocket-bearing zone was close to the surface. A stick marks the position of each pocket with white card attached. Photo by T.F. Lamp. Oxford County, Maine. Plate 12 in U.S. Geological Survey. Bulletin 445. 1911. #1:/New Mexico-Bulletin 435/dnh00872 ID. Darton, N.H. 872 Cretaceous and underlying sandstone on southwest side of Zuni uplift near Nutria northeast of Zuni, looking northwest. Zuni Mountain to the right. McKinley County, New Mexico 1905. Plate 17-A in U.S. Geological Survey. Bulletin 435. 1910. #1:/New Mexico-Bulletin 435/dnh00877 ID. Darton, N.H. 877 Hogback of Cretaceous sandstone on northwest slope of Zuni uplift northeast of Gallup, horizontal Cretaceous coal measures to left; Zuni sandstone in distance to right. McKinley County, New Mexico 1905. Plate 12-B in U.S. Geological Survey. Bulletin 435. 1910. Plate 7 in U.S. Geological Survey. Bulletin 860. 1934. #1:/Arizona-Bulletin 435/dnh00887 ID. Darton, N.H. 887 Badlands in "Leroux" sandy clays 12 miles north of Holbrook, buttes of red sandstone and basalt in distance. Navajo County, Arizona. 1905. Plate 8-B in U.S. Geological Survey. Bulletin 435. 1910. #1:/Arizona-Bulletin 435/dnh00892 ID. Darton, N.H. 892 Sink in Kaibab limestone near Flagstaff. Coconino County, Arizona. 1905. Plate 7-B in U.S. Geological Survey. Bulletin 435. 1910. #1:/Arizona-Bulletin 435/dnh00896 ID. Darton, N.H. 896 Canyon Diablo, looking north from railroad, in Kaibab limestone; 300 feet deep. Coconino County, Arizona. 1905. Plate 6-A in U.S. Geological Survey. Bulletin 435. 1910. #1:/New Mexico-Bulletin 435/dnh00899 ID. Darton, N.H. 899 Fort Defiance anticline in Bonita valley, northwest of Manuelito, looking north. McKinley County, New Mexico 1905. Plate 17-B in U.S. Geological Survey. Bulletin 435. 1910. #1:/Arizona-Bulletin 435/dnh00900 ID. Darton, N.H. 900 Pre-Cambrian granite with nearly vertical jointing at Granite siding north of Prescott. Yavapai County, Arizona. 1905. Plate 3-A in U.S. Geological Survey. Bulletin 435. 1910. #1:/Arizona-Bulletin 435/dnh00902 ID. Darton, N.H. 902 Bill Williams Mountain, from the east, reservoir for Santa Fe Railway in foreground. Coconino County, Arizona. 1905. Plate 14-B in U.S. Geological Survey. Bulletin 435. 1910. #1:/Arizona-Bulletin 435/dnh00905 ID. Darton, N.H. 905 Upper falls of Cataract creek, below Supai. Top of Redwall limestone overlain by Supai red beds; Coconino sandstone and Kaibab limestone in the distance. Coconino County, Arizona. 1905. Plate 4-B in U.S. Geological Survey. Bulletin 435. 1910. #1:/Arizona-Bulletin 435/dnh00909 ID. Darton, N.H. 909 Sandstone of Tonto group north of Peach Springs, looking north, granite to right, on east side of fault. Mohave County, Arizona. 1905. Plate 4-A in U.S. Geological Survey. Bulletin 435. 1910. #1:/New Mexico-Bulletin 435/dnh01337 ID. Darton, N.H. 1337 Cretaceous sandstone on Zuni red sandstone at Tarque, south of Zuni. McKinley County, New Mexico 1905. Plate 12-A in U.S. Geological Survey. Bulletin 435. 1910. #1:/Arizona-Bulletin 435/lwt00130 ID. Lee, W.T. 130 Petrified Forest National Park, Arizona; Clays capped by conglomeratic sandstone, the logs occur in the sandstone. 1905. Plate 8-A in U.S. Geological Survey. Bulletin 435. 1910. #1:/Arizona-Bulletin 435/lwt00143 ID. Lee, W.T. 143 Tertiary limestone in part of conglomeratic, Hualpai wash. Coconino County, Arizona. 1905. Plate 13-B in U.S. Geological Survey. Bulletin 435. 1910. #1:/Alaska-Bulletin 443/pai00656 ID. Paige, S. 656 Slate of the Orca group overlain by greenstone near Rocky Point, fragments of slate found here contained worm tubes (Terebellina palachei Ulrich). Prince William Sound, Alaska. 1905. Plate 7-B in U.S. Geological Survey. Bulletin 443. 1910. #1:/Alaska-Bulletin 443/pai00657 ID. Paige, S. 657 Ellipsoidal greenstone, near Rocky Point. Prince William Sound, Alaska. 1905. Plate 8- A in U.S. Geological Survey. Bulletin 443. 1910. #1:/Alaska-Bulletin 443/pai00699 ID. Paige, S. 699 Sections across ellipsoidal greenstone near Rocky Point. Prince William Sound, Alaska. 1905. Plate 8-B in U.S. Geological Survey. Bulletin 443. 1910. #1:/Alaska-Bulletin 443/pai00713 ID. Paige, S. 713 Slate and greywacke of the Orca group, Gull Island; the lighter colored, more resistant layers are greywacke. Prince William Sound, Alaska. 1905. Plate 7-A in U.S. Geological Survey. Bulletin 443. 1910. Figure 54 in U.S. Geological Survey Bulletin 989-E. 1954. #1:/Pennsylvania-Bulletin 447/pwc00079 ID. Phalen, W.C. 79 Sandstone near base of Conemaugh formation near Johnstown. Cambria County, Pennsylvania. 1906. Plate 3-B in U.S. Geological Survey. Bulletin 447. 1911. #1:/Pennsylvania-Bulletin 447/pwc00088 ID. Phalen, W.C. 88 Exposure of upper Kittanning coal and Johnstown limestone member ("cement bed" in the illustration) on Stony Creek, near mine of Valley Coal and Stone Company. Cambria County, Pennsylvania. 1906. Plate 7-A in U.S. Geological Survey. Bulletin 447. 1911. #1:/Pennsylvania-Bulletin 447/pwc00089 ID. Phalen, W.C. 89 Upper Freeport coal with overlying shales and base of Mahoning sandstone at south portal of Baltimore and Ohio railroad tunnel, Stony Creek. Cambria County, Pennsylvania. 1906. Plate 7-B in U.S. Geological Survey. Bulletin 447. 1911. #1:/Pennsylvania-Bulletin 447/pwc00091 ID. Phalen, W.C. 91 Typical exposure of Mauch Chunk shale at the viaduct between South Fork and Mineral Point; note the alternating thin layers of sandstone and shale and the vertical jointing. Cambria County, Pennsylvania. 1906. Plate 5-A in U.S. Geological Survey. Bulletin 447. 1911. #1:/Pennsylvania-Bulletin 447/pwc00095 ID. Phalen, W.C. 95 Exposure of Lower Freeport coal on Stony Creek, near trolley bridge, the underlying sandstone is the Butler. The Lower Freeport limestone member shows below the coal. Cambria County, Pennsylvania. 1906. Plate 4-A in U.S. Geological Survey. Bulletin 447. 1911. #1:/Pennsylvania-Bulletin 447/pwc00098 ID. Phalen, W.C. 98 South Fork and washed away dam (abutment), the breaking of this dam caused the Johnstown flood of May 31, 1889. Cambria County, Pennsylvania. 1906. Plate 3-A in U.S. Geological Survey. Bulletin 447. 1911. #1:/Pennsylvania-Bulletin 447/pwc00101 ID. Phalen, W.C. 101 Shale quarry of B.H. Campbell at the Mercer horizon north of Sheridan (Oakhurst) the rounded boulders in the foreground are probably of Pleistocene age. Cambria County, Pennsylvania. 1906. Plate 5-B in U.S. Geological Survey. Bulletin 447. 1911. #1:/Pennsylvania-Bulletin 447/pwc00104 ID. Phalen, W.C. 104 Loyalhanna limestone, top member of Pocono formation, at summit of Ebensburg (viaduct) anticline, Mineral Point. Cambria County, Pennsylvania. 1906. Plate 6-B in U.S. Geological Survey. Bulletin 447. 1911. #1:/Pennsylvania-Bulletin 447/pwc00105 ID. Phalen, W.C. 105 Country bank of the better class on the Upper Kittanning coal near Mineral Point. Cambria County, Pennsylvania. 1906. Plate 4-B in U.S. Geological Survey. Bulletin 447. 1911. #1:/Wyoming/sar00378 ID. Schultz, A.R. 378 Field sanitation, cook cleaning pots and pans in Lone Springs camp, T. 14 N., R. 104 W., Wyoming. 1906. #1:/Wyoming/sar00383 ID. Schultz, A.R. 383 Sheepherders wagon near crest of divide northeast of Red Creek, T. 13 N., R. 104 W. Sweetwater County, Wyoming. 1906. #1:/Idaho/ujb00148 ID. Umpleby, J.B. 148 Wagon and equipment including mess box used in Idaho reconnaissance work, from the right rear showing oil lantern and some the items stored on the shelves of the cabinet. Idaho. 1913. #1:/Idaho/ujb00149 ID. Umpleby, J.B. 149 Wagon and equipment with mess table extended in Idaho reconnaissance work, from the right front, with a horse in the background, tents to the left. Idaho. 1913. #1:/Idaho/ujb00152 ID. Umpleby, J.B. 152 Wagon packed, driver, and horses ready to go. Idaho. 1913. #1:/Arizona-Bulletin 451/banh0037 ID. Bancroft, H. 37 Camp of Corona Copper Company, hills in the background show schistose structure. Yuma County, Arizona. 1909. Plate 8-B in U.S. Geological Survey. Bulletin 451. 1911. #1:/Arizona-Bulletin 451/banh0041 ID. Bancroft, H. 41 Near Cunningham pass mine, showing intrusive diabase in gneiss. La Paz County, Arizona. 1909. Plate 7-B in U.S. Geological Survey. Bulletin 451. 1911. #1:/Arizona-Bulletin 451/banh0042 ID. Bancroft, H. 42 Head frame, dump and other features at Critic shaft, Cunningham Pass mine. A bush in the foreground, was masked in the published version of this photo. La Paz County, Arizona. 1909. Plate 8-A in U.S. Geological Survey. Bulletin 451. 1911. #1:/Arizona-Bulletin 451/banh0044 ID. Bancroft, H. 44 Ridges in vicinity of Arizona Northern Property. Yuma County, Arizona. 1909. Plate 4- A in U.S. Geological Survey. Bulletin 451. 1911. #1:/Arizona-Bulletin 451/banh0045 ID. Bancroft, H. 45 Peak just east of Arizona Northern Property. Yuma County, Arizona. 1909. Plate 4-B in U.S. Geological Survey. Bulletin 451. 1911. #1:/Arizona-Bulletin 451/banh0048 ID. Bancroft, H. 48 Caved stope in Bonanza mine, Harquahala, La Paz County, Arizona. 1909. Plate 5-A in U.S. Geological Survey. Bulletin 451. 1911. #1:/Arizona-Bulletin 451/banh0049 ID. Bancroft, H. 49 Part of Harquahala, including buildings of the Bonanza mine. La Paz County, Arizona. 1909. Plate 5-B in U.S. Geological Survey. Bulletin 451. 1911. #1:/Arizona-Bulletin 451/banh0054 ID. Bancroft, H. 54 Near Hercules mine, showing contact of metamorphosed rocks with underlying quartz diorite gneiss. Yuma County, Arizona. 1909. Plate 7-A in U.S. Geological Survey. Bulletin 451. 1911. #1:/Arizona-Bulletin 451/banh0064 ID. Bancroft, H. 64 Smelter at Planet, La Paz County, Arizona. 1909. Plate 2-A in U.S. Geological Survey. Bulletin 451. 1911. #1:/Arizona-Bulletin 451/banh0065 ID. Bancroft, H. 65 Mountain of gneiss and schist on Willams River, 1 mile west of Planet. La Paz County, Arizona. 1909. Plate 2-B in U.S. Geological Survey. Bulletin 451. 1911. #1:/Arizona-Bulletin 451/banh0067 ID. Bancroft, H. 67 Basalt boulders on divide between Billy Mack's and Osbourne properties; Monument Peak in the distance. Yuma County, Arizona. 1909. Plate 3-A in U.S. Geological Survey. Bulletin 451. 1911. #1:/Arizona-Bulletin 451/banh0068 ID. Bancroft, H. 68 Smelter at Cinnabar, La Paz County, Arizona. 1909. Plate 3-B in U.S. Geological Survey. Bulletin 451. 1911. #1:/Texas-Bulletin 450/pai00912 ID. Paige, S. 912 Pegmatite with granite intruding schist, Llano County, Texas. 1908. Plate 5-B in U.S. Geological Survey. Bulletin 450. 1911. #1:/Texas-Bulletin 450/pai00915 ID. Paige, S. 915 Banding of magnetite ore. Llano County, Texas. 1908. Plate 4-B in U.S. Geological Survey. Bulletin 450. 1911. #1:/Texas-Bulletin 450/pai00939 ID. Paige, S. 939 Folding of upper Cambrian sandstone on Beaver Creek, near lead prospect. Mason County, Texas. 1908. Plate 5-A in U.S. Geological Survey. Bulletin 450. 1911. #1:/Alaska-Bulletin 449/sps00081 ID. Smith, P.S. 81 Folded and shattered limestone on Ophir Creek. Nome district, Seward Peninsula region, Alaska. 1909. Plate 13-B in U.S. Geological Survey. Bulletin 449. 1911. #1:/Alaska/sps00295 ID. Smith, P.S. 295 Geologist with a packhorse, loaded with about 2 weeks of supplies and equipment. Seward Peninsula, Alaska. August 12, 1908. #1:/Alaska-Bulletin 449/sps00352 ID. Smith, P.S. 352 Concretions in sandstones of Shaktolik group. Koyuk district, Seward Peninsula region, Alaska. 1909. Plate 10-B in U.S. Geological Survey. Bulletin 449. 1911 #1:/Alaska-Bulletin 449/sps00356 ID. Smith, P.S. 356 Asymmetric valley, Shaktolik Basin, Koyuk district, Seward Peninsula region, Alaska. 1909. Plate 2-A in U.S. Geological Survey. Bulletin 449. 1911. #1:/Alaska-Bulletin 449/sps00359 ID. Smith, P.S. 359 Sandstones and shales of Shaktolik group, Shaktolik River. Koyuk district, Seward Peninsula region, Alaska. 1909. Plate 10-A in U.S. Geological Survey. Bulletin 449. 1911. #1:/Alaska-Bulletin 449/sps00399 ID. Smith, P.S. 399 Folded limestone near Omiak mine. Seward Peninsula region, Alaska. 1909. Plate 13-A in U.S. Geological Survey. Bulletin 449. 1911. #1:/Alaska-Bulletin 449/sps00411 ID. Smith, P.S. 411 Characteristic mountain topography, Darby Range. Council district, Seward Peninsula region, Alaska. 1909. Plate 3-A in U.S. Geological Survey. Bulletin 449. 1911. #1:/Alaska-Bulletin 449/sps00414 ID. Smith, P.S. 414 Venation in limestone, east coast of Darby Peninsula. Council district, Seward Peninsula region, Alaska. 1909. Plate 12-B in U.S. Geological Survey. Bulletin 449. 1911. #1:/Alaska-Bulletin 449/sps00415 ID. Smith, P.S. 415 East coast of Darby Peninsula, Council district, Seward Peninsula region, Alaska. 1909. Plate 3-B in U.S. Geological Survey. Bulletin 449. 1911. #1:/Alaska-Bulletin 449/sps00422 ID. Smith, P.S. 422 Paleozoic limestone, Darby Peninsula; intruded by greenstone. , Council district, Seward Peninsula region, Alaska. 1909. Plate 8-A in U.S. Geological Survey. Bulletin 449. 1911. #1:/Alaska-Bulletin 449/sps00427 ID. Smith, P.S. 427 Paleozoic limestone, Darby Peninsula, intruded by granite. Council district, Seward Peninsula region, Alaska. 1909. Plate 8-B in U.S. Geological Survey. Bulletin 449. 1911. #1:/Alaska-Bulletin 449/sps00428 ID. Smith, P.S. 428 Inclusions, east coast Darby Peninsula. Council district, Seward Peninsula region, Alaska. 1909. Plate 12-A in U.S. Geological Survey. Bulletin 449. 1911. #1:/Alaska-Bulletin 467/srw00102 ID. Stone, R.W. 102 Anchorage Bay from the southwest. Beyond the larger body of water, which is portion of Chignik Bay, are the Aleutian Mountains. The correspondence of summit levels is somewhat remarkable. Chignik district, Southwestern Alaska region, Alaska. 1908. Plate 11-B in U.S. Geological Survey. Bulletin 467. 1911. #1:/Alaska-Bulletin 467/srw00103 ID. Stone, R.W. 103 Anchorage Bay from the southwest. Beyond the larger body of water, which is portion of Chignik Bay, are the Aleutian Mountains. The correspondence of summit levels is somewhat remarkable. Chignik district, Southwestern Alaska region, Alaska. 1908. Plate 11-B in U.S. Geological Survey. Bulletin 467. 1911. #1:/Alaska-Bulletin 467/srw00121 ID. Stone, R.W. 121 Tunnel opening in Whalers Creek coal seam. Chignik district, Southwestern Alaska region, Alaska. 1908. Plate 14-B in U.S. Geological Survey. Bulletin 467. 1911. #1:/Idaho-Bulletin 466/topa0280 ID. Topography A 280 Monument at intersection of Idaho-Washington boundary line with international boundary. Crew holding instruments of the trade. Idaho and Washington Boundary Retracement. Photo by C.L. Nelson. Idaho. 1908. Plate 6-B in U.S. Geological Survey. Bulletin 466. 1911. #1:/Idaho-Bulletin 466/topa0281 ID. Topography A 281 Junction of Clearwater and Snake Rivers. Idaho and Washington Boundary Retracement. Photo by C.L. Nelson. Idaho. 1908. Plate 1-A in U.S. Geological Survey. Bulletin 466. 1911. #1:/Idaho-Bulletin 466/topa0282 ID. Topography A 282 Stone monument no. 60. Washington. Idaho and Washington Boundary Retracement. Photo by C.L. Nelson. Idaho. 1908. Plate 5-A in U.S. Geological Survey. Bulletin 466. 1911. #1:/Idaho-Bulletin 466/topa0283 ID. Topography A 283 Blocking (marking) a witness tree, on Rat Island. Idaho and Washington Boundary Retracement. Photo by C.L. Nelson. Idaho. 1908. Plate 2-B in U.S. Geological Survey. Bulletin 466. 1911. #1:/Idaho-Bulletin 466/topa0284 ID. Topography A 284 Crewman finishing monument at milepost 13. Idaho and Washington Boundary Retracement. Photo by C.L. Nelson. Idaho. 1908. Plate 3-A in U.S. Geological Survey. Bulletin 466. 1911. #1:/Idaho-Bulletin 466/topa0285 ID. Topography A 285 Crewman at monument at milepost 51. Idaho and Washington Boundary Retracement. Photo by C.L. Nelson. Idaho. 1908. Plate 3-B in U.S. Geological Survey. Bulletin 466. 1911. #1:/Idaho-Bulletin 466/topa0286 ID. Topography A 286 Vista cut along boundary line and crew. Idaho and Washington Boundary Retracement. Photo by C.L. Nelson. Idaho. 1908. Plate 2-A in U.S. Geological Survey. Bulletin 466. 1911. #1:/Idaho-Bulletin 466/topa0287 ID. Topography A 287 Section of fir witness tree, showing annular growth. Idaho and Washington Boundary Retracement. Idaho. 1908. Plate 4 in U.S. Geological Survey. Bulletin 466. 1911. Plate 6-A in U.S. Geological Survey. Bulletin 689. 1923. Plate 10 in U.S. Geological Survey. Bulletin 817. 1930. #1:/Idaho-Bulletin 466/topa0288 ID. Topography A 288 Setting stone monument no. 115. Washington. Idaho and Washington Boundary Retracement. Idaho. 1908. Plate 5-B in U.S. Geological Survey. Bulletin 466. 1911. #1:/Canada-Bulletin 466/topa0289 ID. Topography A 289 International Boundary monument no. 195. and crew. Canada. Idaho and Washington Boundary Retracement. Idaho. 1908. Plate 6-A in U.S. Geological Survey. Bulletin 466. 1911. #1:/Idaho-Bulletin 466/topa0290 ID. Topography A 290 Spirit Lake, Idaho. Idaho and Washington Boundary Retracement. Photo by C.L. Nelson. Idaho. 1908. Plate 1-B in U.S. Geological Survey. Bulletin 466. 1911. #1:/Wyoming-Bulletin 452/wch00035 ID. Wegemann, C.H. 35 Shale of the Pierre formation in the Salt Creek anticline, sec. 35, T. 40 N., R. 79 W., showing thin ferruginous layers on which dip readings were taken. Natrona County, Wyoming. 1909. Plate 10-A in U.S. Geological Survey. Bulletin 452. 1911. Plate 7 in U.S. Geological Survey. Bulletin 670. 1918. #1:/Wyoming-Bulletin 452/wch00036 ID. Wegemann, C.H. 36 The Shannon sandstone lentil, 1.5 miles south of Shannon, east side of Salt Creek, both ledges appear, the upper at the crest of the hill, the lower, which carries the oil, half way down the slope. The cut bank above the creek is alluvium. Natrona County, Wyoming. 1909. Plate 11-A in U.S. Geological Survey. Bulletin 452. 1911. #1:/Wyoming-Bulletin 452/wch00037 ID. Wegemann, C.H. 37 Castle Rock. Shannon sandstone lentil, SW ¼ Sec. 8, T. 39 N., R. 78 W. The two ledges here stand in a single cliff. Natrona County, Wyoming. 1909. Plate 11-B in U.S. Geological Survey. Bulletin 452. 1911. #1:/Wyoming-Bulletin 452/wch00040 ID. Wegemann, C.H. 40 Massive sandstone at base of Parkman sandstone member of Pierre formation, sec. 4, T. 38 N., R. 78 W. Natrona County, Wyoming. 1909. Plate 9-A in U.S. Geological Survey. Bulletin 452. 1911. #1:/Wyoming-Bulletin 452/wch00041 ID. Wegemann, C.H. 41 Little Pine Ridge, sec. 7, T. 38 N, R. 78 W. Natrona County, Wyoming. 1909. Plate 9-B in U.S. Geological Survey. Bulletin 452. 1911. #1:/Wyoming-Bulletin 452/wch00042 ID. Wegemann, C.H. 42 Escarpment east of Wall Creek, Wall Creek sandstone lentil on right; sandstone bearing pines is 220 feet below. Natrona County, Wyoming. 1909. Plate 8-A in U.S. Geological Survey. Bulletin 452. 1911. #1:/Wyoming-Bulletin 452/wch00043 ID. Wegemann, C.H. 43 Dakota (?) sandstone and open oil well in Oil Canyon Powder River Oil field 18 miles west Salt Creek, iron pipe on left leads from the well. Natrona County, Wyoming. 1909. Plate 8-B in U.S. Geological Survey. Bulletin 452. 1911. #1:/Wyoming-Bulletin 452/weg00136 ID. Woodruff, E.G. 136 Anticline in Little Popo Agie district, Lander Oil field, looking northwest across Twin Creek. Fremont County, Wyoming. 1909. Plate 3 in U.S. Geological Survey. Bulletin 452. 1911. #1:/Wyoming-Bulletin 452/weg0136a ID. Woodruff, E.G. 136a Anticline in Little Popo Agie district, Lander Oil field, looking northwest across Twin Creek. Fremont County, Wyoming. 1909. Plate 3 in U.S. Geological Survey. Bulletin 452. 1911. #1:/Wyoming-Bulletin 452/weg0136b ID. Woodruff, E.G. 136b Anticline in Little Popo Agie district, Lander Oil field, looking northwest across Twin Creek. Fremont County, Wyoming. 1909. Plate 3 in U.S. Geological Survey. Bulletin 452. 1911. #1:/Wyoming-Bulletin 452/weg0136c ID. Woodruff, E.G. 136c Anticline in Little Popo Agie district, Lander Oil field, looking northwest across Twin Creek. Fremont County, Wyoming. 1909. Plate 3 in U.S. Geological Survey. Bulletin 452. 1911. #1:/Wyoming-Bulletin 452/weg00146 ID. Woodruff, E.G. 146 Along Little Popo Agie River near the mouth of Twin Creek, showing oil wells and storage tank. Fremont County, Wyoming. 1909. Plate 4 in U.S. Geological Survey. Bulletin 452. 1911. #1:/Wyoming-Bulletin 452/weg0146a ID. Woodruff, E.G. 146a Along Little Popo Agie River near the mouth of Twin Creek, showing oil wells and storage tank. Fremont County, Wyoming. 1909. Plate 4 in U.S. Geological Survey. Bulletin 452. 1911. #1:/Wyoming-Bulletin 452/weg00156 ID. Woodruff, E.G. 156 General view of beds forming the crest of the anticline in T. 1 N., R. 1 W., Wind River Meridian, the top of the are shown near the middle of the picture is in the Sundance formation and the ridges just to the right and left are composed of Lower Cretaceous sandstone. Along the skyline in the background is the Mowry shale member. Fremont County, Wyoming. 1909. Plate 2-A in U.S. Geological Survey. Bulletin 452. 1911. #1:/Wyoming-Bulletin 452/weg00157 ID. Woodruff, E.G. 157 Beds forming the crest of the anticline in sec. 4, T. 1 N., R. 1 W., Wind River Meridian, the arch in the center is composed of Jurassic beds. The ridge to the right is formed of Lower Cretaceous sandstone. Fremont County, Wyoming. 1909. Plate 2-B in U.S. Geological Survey. Bulletin 452. 1911. #1:/Colorado-Bulletin 478/ccw00743 ID. Cross, C.W. 743 Roundtop Mountain, Lake City, mining region. Looking westward across Lake Fork of the Gunnison, from westward ledge of the glacial bench below Horse Park. Hinsdale County, Colorado. September 22 1905. Plate 4-A in. U. S. Geological Survey. Bulletin 478. 1911. #1:/Colorado-Bulletin 478/ccw00744 ID. Cross, C.W. 744 Post-glacial canyon of Henson Creek, showing gorge in Eureka rhyolite, Missouri Favorite mine is in the center. Hinsdale County, Colorado. September 23 1905. Plate 4- B in. U. S. Geological Survey. Bulletin 478. 1911. #1:/Colorado-Bulletin 478/ccw00745 ID. Cross, C.W. 745 North of Hensen Creekat 10,000 foot elevation. Hinsdale County, Colorado. September 23, 1905. Plate 2-B in U.S. Geological Survey. Bulletin 478. 1911. #1:/Colorado-Bulletin 478/ccw00763 ID. Cross, C.W. 763 Looking south up Lake Fork, Lake San Cristobal shows in the distance. Contention mill is on the right. Hinsdale County, Colorado. September 22, 1905. Plate 6 in U.S. Geological Survey. Bulletin 478. 1911. #1:/Colorado-Bulletin 478/ccw00912 ID. Cross, C.W. 912 Lake City, from trail to Crystal Lake. Hinsdale County, Colorado. 1908. Plate 2-A in U.S. Geological Survey. Bulletin 478. 1911. #1:/Connecticut-Bulletin 484/dtn00237 ID. Dale, T.N. 237 Polished slab of pegmatitic, biotite granite gneiss ("Branford Red Granite") from the Norcross quarry at Stony Creek, showing irregularity in size of particles owing to pegmatization and their arrangement to flow structure and probably also to gneissic foliation. Ruler shown is 12 inches long. New Haven County, Connecticut. 1907. Plate 3-A in U.S. Geological Survey. Bulletin 484. 1911. Plate 30-A in U.S. Geological Survey. Bulletin 738. 1923. #1:/Connecticut-Bulletin 484/dtn00241 ID. Dale, T.N. 241 Sachem Head breakwater granite quarry, Guilford, looking northeast, showing the working face of biotite granite with horizontal sheets the long drill holes made in blasting of large masses, and tracks to the dock. New Haven County, Connecticut. 1907. Plate 5 in U.S. Geological Survey. Bulletin 484. 1911. #1:/Connecticut-Bulletin 484/dtn0247a ID. Dale, T.N. 247a Coarse porphyritic biotite granite gneiss from Hoadly Point, "west" quarry Branford, showing the lenticular shapes of the feldspars and the distribution of the mica and quartz in bands. The large lenses are mostly microcline feldspar. New Haven County, Connecticut. 1907. Plate 4-A in U.S. Geological Survey. Bulletin 484. 1911. Plate 31-A in U.S. Geological Survey. Bulletin 738. 1923. #1:/Virginia-Bulletin 483/dnh00209 ID. Darton, N.H. 209 The Lafayette plain near Richmond. Henrico County Virginia. 1906. Plate 2-A in U.S. Geological Survey. Bulletin 483. 1911. #1:/Virginia-Bulletin 483/dnh00211 ID. Darton, N.H. 211 West slope of Shockoe Creek valley, near intersection of Twelve and Leigh Street, looking southwest. Calvert formation capped by Lafayette. Richmond (city) County Virginia. 1906. Plate 3-A in U.S. Geological Survey. Bulletin 483. 1911. #1:/Virginia-Bulletin 483/dnh00212 ID. Darton, N.H. 212 Contact of Calvert and Aquia formations in gully at Twelfth and Leigh Streets, looking south. Richmond (city) County Virginia. 1906. Plate 4-B in U.S. Geological Survey. Bulletin 483. 1911. #1:/Virginia-Bulletin 483/dnh00213 ID. Darton, N.H. 213 Calvert formation in cut near Eleventh and Turpin Street, diatom-bearing clays, Richmond (city) County Virginia. 1906. Plate 4-A in U.S. Geological Survey. Bulletin 483. 1911. #1:/Virginia-Bulletin 483/dnh01234 ID. Darton, N.H. 1234 Granite quarry of J.A. McCloy, on Grove Avenue, in western part of Richmond (city) County Virginia. 1906. Plate 8-A in U.S. Geological Survey. Bulletin 483. 1911. #1:/Virginia-Bulletin 483/dnh01235 ID. Darton, N.H. 1235 Smith granite quarry on south bank of James River, 2 miles above Richmond. Henrico County Virginia. 1906. Plate 6-B in U.S. Geological Survey. Bulletin 483. 1911. #1:/Virginia-Bulletin 483/dnh01237 ID. Darton, N.H. 1237 McGowan granite quarry, on Broad Rock branch, near Petersburg Pike, 3 miles south of Manchester, Richmond County Virginia. 1906. Plate 7-A in U.S. Geological Survey. Bulletin 483. 1911. #1:/Virginia-Bulletin 483/dnh01239 ID. Darton, N.H. 1239 James River falling over granite ledges above Richmond. Henrico County Virginia. 1906. Plate 2-B in U.S. Geological Survey. Bulletin 483. 1911. #1:/Virginia-Bulletin 483/dnh01240 ID. Darton, N.H. 1240 Belle Island granite quarry, face and crusher, from north bank of James River in upper Richmond (city) County Virginia. 1906. Plate 6-A in U.S. Geological Survey. Bulletin 483. 1911. #1:/Virginia-Bulletin 483/dnh01241 ID. Darton, N.H. 1241 One of the quarries of the Richmond Granite Co., just east of the Richmond, Fredericksburg & Potomac railroad, 4 miles northwest of Richmond, shows diagonal jointing. Henrico County Virginia. 1906. Plate 7-B in U.S. Geological Survey. Bulletin 483. 1911. #1:/Virginia-Bulletin 483/dnh01243 ID. Darton, N.H. 1243 Lafayette formation in brickyard of Fuller Co., near Fort Lee, 5 miles southeast Richmond. Henrico County Virginia. 1906. Plate 10-A in U.S. Geological Survey. Bulletin 483. 1911. #1:/Virginia-Bulletin 483/dnh01244 ID. Darton, N.H. 1244 Working face of Lafayette formation in west end brickyards, near Carey Street Road, Richmond (city) County Virginia. 1906. Plate 10-B in U.S. Geological Survey. Bulletin 483. 1911. #1:/Virginia-Bulletin 483/dnh01246 ID. Darton, N.H. 1246 Typical face of brick clay at Rocketts, showing Columbia formation. Richmond (city) County Virginia. 1906. Plate 9-B in U.S. Geological Survey. Bulletin 483. 1911. #1:/Virginia-Bulletin 483/dnh01248 ID. Darton, N.H. 1248 Upper clay of Davis Brickyards on Maury Street, Manchester Richmond County Virginia. 1906. Plate 8-B in U.S. Geological Survey. Bulletin 483. 1911. #1:/Virginia-Bulletin 483/dnh01249 ID. Darton, N.H. 1249 Main working face of Davis Brickyards on Maury Street, showing Columbia formation. Richmond County Virginia. 1906. Plate 9-A in U.S. Geological Survey. Bulletin 483. 1911. #1:/Virginia-Bulletin 483/dnh01250 ID. Darton, N.H. 1250 Paxtuxent formation in cut of Chesapeake & Ohio Railway at bridge of Main Street at Lester Street, Richmond (city) County Virginia. 1906. Plate 3-B in U.S. Geological Survey. Bulletin 483. 1911. #1:/Virginia-Bulletin 483/dnh01251 ID. Darton, N.H. 1251 Columbia group on Patuxent formation on south bank of Gillis Creek, near its mouth, Richmond (city) County Virginia. 1906. Plate 5-B in U.S. Geological Survey. Bulletin 483. 1911. #1:/Virginia-Bulletin 483/dnh01252 ID. Darton, N.H. 1252 Calvert formation on granite on north bank of James River near foot of Pine Street, Richmond (city) County Virginia. 1906. Plate 5-A in U.S. Geological Survey. Bulletin 483. 1911. #1:/Missouri-Bulletin 494/fml00064 ID. Fuller, M.L. 64 New Madrid Earthquakes 1811-12. River-swamp type of sunk lands formed by earthquake. Varney River, Missouri. 1904. Plate 5-B in U.S. Geological Survey. Bulletin 494. 1912. #1:/Missouri-Bulletin 494/fml00065 ID. Fuller, M.L. 65 New Madrid Earthquakes 1811-12. Water weeds of shallower lakes of the sunk lands, Varney River. Missouri. 1904. Plate 5-A in U.S. Geological Survey. Bulletin 494. 1912. #1:/Missouri-Bulletin 494/fml00068 ID. Fuller, M.L. 68 New Madrid Earthquakes 1811-12. Young growth along edges of sunk lands, Varney River. Missouri. 1904. Plate 6-A in U.S. Geological Survey. Bulletin 494. 1912. #1:/Missour-Bulletin 494/fml00069 ID. Fuller, M.L. 69 New Madrid Earthquakes 1811-12. Channel of Varney River. Missouri. 1904. Plate 6-B in U.S. Geological Survey. Bulletin 494. 1912. #1:/Arkansas-Bulletin 494/fml00131 ID. Fuller, M.L. 131 New Madrid Earthquakes 1811-12. Cypress trunks killed by submergence resulting from the earthquake. Lake St. Francis, Arkansas. 1904. Plate 4-B in U.S. Geological Survey. Bulletin 494. 1912. #1:/Tennessee-Bulletin 494/fml00154 ID. Fuller, M.L. 154 New Madrid Earthquakes 1811-12. Elevated cypress near south end of Reelfoot Lake. Lake County, Tennessee. 1904. Plate 7-B in U.S. Geological Survey. Bulletin 494. 1912. #1:/Arkansas-Bulletin 494/fml00361 ID. Fuller, M.L. 361 New Madrid Earthquakes 1811-12. Stumps of trees killed by deposits of sand. Lake County, Tennessee. Plate 10-A in U.S. Geological Survey. Bulletin 494. 1912. #1:/Arkansas-Bulletin 494/fml00375 ID. Fuller, M.L. 375 New Madrid Earthquakes 1811-12. One side of fault trench or "fissure" near banks of St. Francis River, Clay County, Arkansas. 1904. Plate 2-A in U.S. Geological Survey. Bulletin 494. 1912. #1:/Alaska-Bulletin 485/kfj00010 ID. Katz, F.J. 10 Accordant mountain summits, showing Mount Iliamna rising above them and smooth glaciated slopes below, looking northeast from point near head of Pile Bay. Chintna district, Cook Inlet region, Alaska. 1904. Plate 8-A in U.S. Geological Survey. Bulletin 485. 1912. #1:/Alaska-Bulletin 485/kfj00015 ID. Katz, F.J. 15 Tanalian Falls, showing water power and character of timber on Clark Lake. Clark district, Southwestern Alaska. 1904. Plate 3-B in U.S. Geological Survey. Bulletin 485. 1912. #1:/Alaska-Bulletin 485/kfj00029 ID. Katz, F.J. 29 Iliamna village and river, showing character of lowlands in valleys tributary to Iliamna Lake. Southwestern Alaska. 1904. Plate 3-A in U.S. Geological Survey. Bulletin 485. 1912. #1:/Connecticut-Bulletin 492/lgf00271 ID. Loughlin, G.F. 271 Photomicrograph of olivine gabbro, the poikilitic character of ilmenite is especially well shown. Its contact with adjacent and inclosed feldspar is marked by rims of brown hornblende. The olivine also has rims of brown hornblende along its contact with feldspar. Within this rim is a second (white)rim of talc, followed by a third rim of magnetite. No diallage appears in the field. Magnified 50 diameters. Nicols crossed. New London County, Connecticut. 1904. Plate 12-B in U.S. Geological Survey. Bulletin 492. 1912. #1:/Connecticut-Bulletin 492/lgf00272 ID. Loughlin, G.F. 272 Photomicrograph of hornblende crystals in quartz-hornblende gabbro. The rims are compact, but the interiors are sprinkled with quartz. Magnified about 100 diameters. Without cross nicols. New London County, Connecticut. 1904. Plate 13-B in U.S. Geological Survey. Bulletin 492. 1912. #1:/Connecticut-Bulletin 492/lgf00314 ID. Loughlin, G.F. 314 Photomicrograph of pseudoporohyritic kinzigite. The large white areas are albite- oligoclase, the dark areas garnets. Both are of metamorphic origin. The edges of the albite-oligoclase grains indicate growth by assimilation of small granules from the groundmass. The groundmass is a fine-grained aggregate of biotite, albite-oligoclase, quartz, and ilmenite. Magnified 40 diameters. Nicols crossed. New London County, Connecticut. 1904. Plate 8-A in U.S. Geological Survey. Bulletin 492. 1912. #1:/Connecticut-Bulletin 492/lgf00315 ID. Loughlin, G.F. 315 Photomicrograph of diallage crystal in gabbro, showing rims of brown hornblende along the contacts with feldspar. The black veinlet is limonite. Magnified 30 diameters. Without crossed nicols. New London County, Connecticut. 1904. Plate 9-A in U.S. Geological Survey. Bulletin 492. 1912. #1:/Connecticut-Bulletin 492/lgf00316 ID. Loughlin, G.F. 316 Photomicrograph of moderately mashed gabbro, showing the edge of a poikilitiec diallage (black) in the upper left-hand portion. The rest of the area consists of unaltered feldspars in a mat of fine, unoriented uralite needles. The edges of the feldspars are penetrated by short uralite needles, and to a less extent by epidote. Magnified 30 diameters. Nicols crossed. New London County, Connecticut. 1904. Plate 10-A in U.S. Geological Survey. Bulletin 492. 1912. #1:/Connecticut-Bulletin 492/lgf00317 ID. Loughlin, G.F. 317 Photomicrograph of highly mashed gabbro, the feldspars have suffered some microscopic faulting and rotating, The uralite needles have assumed a schistose arrangement and also fill fault cracks in the feldspar. The ilmenite also has recrystallized into a distinctly schistose arrangement. Magnified 30 diameters. Nicols crossed. New London County, Connecticut. 1904. Plate 11-A in U.S. Geological Survey. Bulletin 492. 1912. #1:/Connecticut-Bulletin 492/lgf00318 ID. Loughlin, G.F. 318 Photomicrograph of extremely mashed gabbro, showing typical schistose structure. The feldspars are finely granulated and in places have undergone saussuritic alteration. The uralite has developed into aggregates of compact hornblende crystals, uniformly oriented and inclosing many feldspar aggregates. The ilmenite has been rearranged into streaks parallel to the schistosity. Magnified 30 diameters. New London County, Connecticut. 1904. Plate 11-B in U.S. Geological Survey. Bulletin 492. 1912. #1:/Connecticut-Bulletin 492/lgf00319 ID. Loughlin, G.F. 319 Photomicrograph of pyroxenite, showing the relation between diallage and ilmenite. The latter is interstital and incloses an occasional diallage grain. The white clouded areas are slightly altered feldspar. Magnified 30 diameters, without crossed nicols. New London County, Connecticut. 1904. Plate 12-A in U.S. Geological Survey. Bulletin 492. 1912. #1:/Connecticut-Bulletin 492/lgf00321 ID. Loughlin, G.F. 321 Photomicrograph of partly replaced alaskite. The speckled central portion is sercicite, with scattered grains of secondary quartz, after microcline and albite. Magnified 30 diameters. Nicols crossed. New London County, Connecticut. 1904. Plate 14-A in U.S. Geological Survey. Bulletin 492. 1912. #1:/Connecticut-Bulletin 492/lgf00322 ID. Loughlin, G.F. 322 Photomicrograph of alaskite completely replaced by quartz. The large black central are is a basal section of quartz. The edges of large grains indicate growth by assimilation of small grains. The black specks in the large grains are chiefly gas cavities. The few minute sercicite granules are not distinguishable. Magnified 30 diameters. Nicols crossed. New London County, Connecticut. 1904. Plate 14-B in U.S. Geological Survey. Bulletin 492. 1912. #1:/Connecticut-Bulletin 492/lgf00324 ID. Loughlin, G.F. 324 Photomicrograph of basic pyroxene hornfels, showing texture and mineral composition, the three conspicuous minerals are labradorite, bronzite and ilmenite. Magnified 40 diameters, with crossed nicols. New London County, Connecticut. 1904. Plate 7-A in U.S. Geological Survey. Bulletin 492. 1912. #1:/Alaska-Bulletin 485/mgc00084 ID. Martin, G.C. 84 Chisik conglomerate, large blocks fallen from cliffs on east shore of Iniskin Bay. Chintna district, Cook Inlet region, Alaska. 1904. Plate 6-B in U.S. Geological Survey. Bulletin 485. 1912. #1:/Washington-Bulletin 474/see00232 ID. Smith, E.E. 232 Bunker of the Clallam Coal Co., at Fuca, at low tide. Clallam County, Washington. 1909. Plate 4-A in U.S. Geological Survey. Bulletin 474. 1911. #1:/Washington-Bulletin 474/see0236a ID. Smith, E.E. 236a Abandoned bunker of the Issaquah Coal Co., at Issaquah, King County, Washington. 1909. Plate 7-A in U.S. Geological Survey. Bulletin 474. 1911. #1:/Washington-Bulletin 474/see00260 ID. Smith, E.E. 260 Glacial boulders on the south bank of Green River near Franklin. King County, Washington. 1909. Plate 6-A in U.S. Geological Survey. Bulletin 474. 1911. #1:/Washington-Bulletin 474/see00263 ID. Smith, E.E. 263 Exposures of the Puget formation, in which the coal occurs, along Green River near Franklin. King County, Washington. 1909. Plate 6-B in U.S. Geological Survey. Bulletin 474. 1911. #1:/Washington-Bulletin 474/see00274 ID. Smith, E.E. 274 Typical forested area of the Puget Sound country, looking east from Lizard Mountain near Bayne, King County, Washington. 1909. Plate 5-B in U.S. Geological Survey. Bulletin 474. 1911. #1:/Washington-Bulletin 474/see00284 ID. Smith, E.E. 284 Forest undergrowth in the coal district near Bayne, a factor which makes study of the coal-bearing formations very difficult. King County, Washington. 1909. Plate 5-A in U.S. Geological Survey. Bulletin 474. 1911. #1:/Washington-Bulletin 474/see00286 ID. Smith, E.E. 286 Washer and bunker of the Pacific Coast Coal Co., at Burnett, Pierce County, Washington. 1909. Plate 7-B in U.S. Geological Survey. Bulletin 474. 1911. #1:/Washington-Bulletin 474/see00290 ID. Smith, E.E. 290 The town of Carbonado, Pierce County, Washington. 1909. Plate 8-A in U.S. Geological Survey. Bulletin 474. 1911. #1:/Washington-Bulletin 474/see00298 ID. Smith, E.E. 298 New beehive coke ovens of the Carbon Hill Coal Co., at Carbonado. Pierce County, Washington. 1909. Plate 8-B in U.S. Geological Survey. Bulletin 474. 1911. #1:/Washington-Bulletin 474/see00316 ID. Smith, E.E. 316 Exposures of beds of anthracite on Summit Creek, Lewis County, Washington. 1909. Plate 4-B in U.S. Geological Survey. Bulletin 474. 1911. #1:/Nevada/agi00144 ID. Adams, G.I. 144 Baseball game in progress; with white backstop, and spectators seen at a considerable distance behind center field, on the outskirts of Tonopah, Nye County, Nevada. Circa 1900. #1:/Alaska/kfj00031 ID. Katz, F.J. 31 Camp barbershop, at Hicks cabin, Cottonwood Bay, Cook Inlet region, Alaska. 1904 #1:/Alaska-Bulletin 498/jbl00192 ID. Johnson, B.L. 192 Wing dam in canyon on creek claim adjoining the "Tammany Bench," Valdez Creek. Copper River region, Alaska. 1910. Plate 8-B in U.S. Geological Survey. Bulletin 498. 1912. #1:/Alaska-Bulletin 498/mgc00217 ID. Martin, G.C. 217 North wall of Matanuska valley about 12 miles above Chickaloon River. Matanuska district, Cook Inlet region, Alaska. 1910. Plate 2-B in U.S. Geological Survey. Bulletin 500. 1912. #1:/Alaska-Bulletin 498/mgc00226 ID. Martin, G.C. 226 Coal bed in east bank of Coal Creek seven-eighths of a mile above its mouth. Matanuska district, Cook Inlet region, Alaska. 1910. Plate 19-B in U.S. Geological Survey. Bulletin 500. 1912. #1:/Alaska-Bulletin 498/mgc00358 ID. Martin, G.C. 358 Gently dipping arkose in west end of ridge north of Moose Creek. The crest of the ridge shows remnants of old smooth topography into which glacial erosion has cut cirques. Matanuska district, Cook Inlet region, Alaska. 1910. Plate 8-B in U.S. Geological Survey. Bulletin 500. 1912 #1:/Alaska-Bulletin 498/mgc00362 ID. Martin, G.C. 362 Exposure of arkose in cliffs on north slope of ridge north of Moose Creek. Matanuska district, Cook Inlet region, Alaska. 1910. Plate 8-A in U.S. Geological Survey. Bulletin 500. 1912. #1:/Alaska-Bulletin 498/mgc00366 ID. Martin, G.C. 366 Gravel cliffs on north bank of Matanuska River, 1 mile above Moose Creek. Matanuska district, Cook Inlet region, Alaska. 1910. Plate 13-B in U.S. Geological Survey. Bulletin 500. 1912. #1:/Alaska-Bulletin 498/mgc00371 ID. Martin, G.C. 371 Coal bed in west bank of Eska Creek 2.4 miles north of Matanuska River. Matanuska district, Cook Inlet region, Alaska. 1910. Plate 17-B in U.S. Geological Survey. Bulletin 500. 1912 #1:/Alaska-Bulletin 498/mgc00373 ID. Martin, G.C. 373 Coal beds in west bank of Eska Creek 2.7 miles north of Matanuska River. Matanuska district, Cook Inlet region, Alaska. 1910. Plate 17-A in U.S. Geological Survey. Bulletin 500. 1912 #1:/Alaska-Bulletin 498/mgc00378 ID. Martin, G.C. 378 Porphyry sill (?) in valley of Young Creek, overlying Chickaloon formation. Matanuska district, Cook Inlet region, Alaska. 1910. Plate 11-A in U.S. Geological Survey. Bulletin 500. 1912 #1:/Alaska-Bulletin 498/mgc00384 ID. Martin, G.C. 384 Granite overlain by arkose at the head of Sheep valley. Matanuska district, Cook Inlet region, Alaska. 1910. Plate 7-A in U.S. Geological Survey. Bulletin 500. 1912. #1:/Alaska-Bulletin 498/mgc00385 ID. Martin, G.C. 385 Granite and Tertiary arkose in gulch on the west side of Sheep valley. Matanuska district, Cook Inlet region, Alaska. 1910. Plate 6-A in U.S. Geological Survey. Bulletin 500. 1912. #1:/Alaska-Bulletin 498/mgc00386 ID. Martin, G.C. 386 Granite and Tertiary arkose in west wall of Sheep valley. Matanuska district, Cook Inlet region, Alaska. 1910. Plate 6-B in U.S. Geological Survey. Bulletin 500. 1912. #1:/Alaska-Bulletin 498/mgc00391 ID. Martin, G.C. 391 Sheep valley from a point near its lower end. Showing the gently dipping arkose represented in Martin 384, overthrust on closely folded arkose beds. Matanuska district, Cook Inlet region, Alaska. 1910. Plate 7-B in U.S. Geological Survey. Bulletin 500. 1912. #1:/Alaska-Bulletin 498/mgc00399 ID. Martin, G.C. 399 Fault between granite (at right) and upper Cretaceous rock (at left) on creek that enters Kings River from the west 1.25 miles above coal camp. Talkeetna district, Cook Inlet region, Alaska. 1910. Plate 14-B in U.S. Geological Survey. Bulletin 500. 1912. #1:/Alaska-Bulletin 498/mgc00401 ID. Martin, G.C. 401 Talkeetna Mountains from the west side of Kings River, Talkeetna district, Cook Inlet region, Alaska. 1910. Plate 2-A in U.S. Geological Survey. Bulletin 500. 1912. #1:/Alaska-Bulletin 498/mgc00414 ID. Martin, G.C. 414 Eska conglomerate in west end of Castle Mountain. Talkeetna district, Cook Inlet region, Alaska. 1910. Plate 9-B in U.S. Geological Survey. Bulletin 500. 1912. #1:/Alaska-Bulletin 498/mgc00421 ID. Martin, G.C. 421 Diabase dike on fault in Chickaloon formation at base of Castle Mountain. Talkeetna district, Cook Inlet region, Alaska. 1910. Plate 12-A in U.S. Geological Survey. Bulletin 500. 1912. #1:/Alaska-Bulletin 498/mgc00433 ID. Martin, G.C. 433 Porphyry sills and dikes in upper Cretaceous rocks on south bank of Matanuska River 2.7 miles below Chickaloon River. Matanuska district, Cook Inlet region, Alaska. 1910. Plate 11-B in U.S. Geological Survey. Bulletin 500. 1912. #1:/Alaska-Bulletin 498/mgc00443 ID. Martin, G.C. 443 Diabase dikes and sills in Chickaloon formation on north bank of Boulder Creek. Matanuska district, Cook Inlet region, Alaska. 1910. Plate 12-B in U.S. Geological Survey. Bulletin 500. 1912. #1:/Wyoming-Bulletin 496/srw00386 ID. Stone, R.W. 386 Cambria, Weston County, Wyoming. 1908. Plate 5-B in U.S. Geological Survey. Bulletin 499. 1912. #1:/Wyoming-Bulletin 496/srw00391 ID. Stone, R.W. 391 Cambria Fuel Co.s tipple at Cambria. Weston County, Wyoming. 1908. Plate 5-A in U.S. Geological Survey. Bulletin 499. 1912. #1:/Wyoming-Bulletin 496/srw00396 ID. Stone, R.W. 396 Lakota sandstone in Camp Canyon, near Cambria. Weston County, Wyoming. 1908. Plate 3-B in U.S. Geological Survey. Bulletin 499. 1912. #1:/Wyoming-Bulletin 496/srw00401 ID. Stone, R.W. 401 Lakota and Dakota sandstones on Little Oil Creek near Cambria, Weston County, Wyoming. 1908. Plate 1-A, with graphics, in U.S. Geological Survey. Bulletin 499. 1912. #1:/Wyoming-Bulletin 496/srw00404 ID. Stone, R.W. 404 Dakota sandstone dipping below surface, 1 mile north of Newcastle, Weston County, Wyoming. 1908. Plate 1-B in U.S. Geological Survey. Bulletin 499. 1912. #1:/Wyoming-Bulletin 496/srw00405 ID. Stone, R.W. 405 Stilwell Coal Co's mine and Lakota sandstone at Aladdin. Crook County, Wyoming. 1909. Plate 3-A in U.S. Geological Survey. Bulletin 499. 1912. #1:/Colorado-Bulletin 510/lwt00247 ID. Lee, W.T. 247 Upper part of Mesaverde formation, 1,500 feet thick in Canyon of the Grand (Colorado) River east of Palisades, a typical view of the sandstones that overlie the coal-bearing beds. Mesa County, Colorado. 1907. Plate 2-B in U.S. Geological Survey. Bulletin 510. 1912. #1:/Colorado-Bulletin 510/lwt00249 ID. Lee, W.T. 249 Promontory south of Palisades, altitude 1,000 feet: showing the upper part of the Mancos shale and the lower part of the Mesaverde formation, including the Rollins sandstone member and the Bowie shale member, with coal near the base and sandstone cliff above. Mesa County, Colorado. 1907. Plate 2-A in U.S. Geological Survey. Bulletin 510. 1912. #1:/Colorado-Bulletin 510/lwt00266 ID. Lee, W.T. 266 West slope of Grand Mesa, 2 miles north of Kahnah Creek, a characteristic exposure showing the slope of the mesa covered with brush except where a washout has exposed the rocks; Mancos shale; sandstone at the base of the coal measures; locality where fossil plants were collected. Mesa County, Colorado. 1907. Plate 3-A in U.S. Geological Survey. Bulletin 510. 1912. #1:/Colorado-Bulletin 510/lwt00268 ID. Lee, W.T. 268 North wall of Gunnison Canyon at mouth of Wells gulch, showing the lower or flaggy member of the Gunnison formation, overlain by variegated shale and the unconformity, and conglomerate at the base of the Dakota sandstone. Delta County, Colorado. 1907. Plate 4-B in U.S. Geological Survey. Bulletin 510. 1912. #1:/Colorado-Bulletin 510/lwt00272 ID. Lee, W.T. 272 Hill consisting of Mancos shale near Delta, illustrating the barrenness of the shale slopes, and showing the occurrence of a zone of black shale about 300 feet above the base of the formation. Delta County, Colorado. 1907. Plate 4-A in U.S. Geological Survey. Bulletin 510. 1912. #1:/Colorado-Bulletin 510/lwt00274 ID. Lee, W.T. 274 The Rollins sandstone at its type locality near Rollins mine. The sandstone cliff, 100 feet high, is underlain by Mancos shale and overlain by the fresh-water division of the Mesaverde formation, the rocks of marine and brackish-water origin being absent. The tops of the columns at the left show the hardened upper surface of the sandstone upon which the coal-bearing shale rests with apparent unconformity. Delta County, Colorado. 1907. Plate 3-B in U.S. Geological Survey. Bulletin 510. 1912. #1:/Colorado-Bulletin 510/lwt00306 ID. Lee, W.T. 306 West slope of Paine mesa, showing an old graded surface dissected by erosion which has revealed the underlying rocks of unequal hardness. Delta County, Colorado. 1907. Plate 5-A in U.S. Geological Survey. Bulletin 510. 1912. #1:/Colorado-Bulletin 510/lwt00309 ID. Lee, W.T. 309 Canyon of North Fork of Gunnison River, near Somerset, looking eastward; showing canyon walls, 2000 feet high, consisting principally of sandstones in upper part of Mesaverde formation. The northward-facing brush covered slopes appear at the right and the rock exposures in the southward-facing slopes at the left. Gunnison County, Colorado. 1907. Plate 7-A in U.S. Geological Survey. Bulletin 510. 1912. #1:/Colorado-Bulletin 510/lwt00310 ID. Lee, W.T. 310 North wall of Gunnison Canyon at Bowie, the base of the slope consists of Mancos shale, above which is the Rollins sandstone member of the Mesaverde formation; the Bowie shale member of the same formation; (the type locality) in which the King mine is located, the Paonia shale member of the Mesaverde formation, and the upper or undifferentiated part of the Mesaverde. (Scale: The mine is 600 feet above the base of the slope) Delta County, Colorado. 1907. Plate 6-B in U.S. Geological Survey. Bulletin 510. 1912. #1:/Colorado-Bulletin 510/lwt00319 ID. Lee, W.T. 319 Typical exposure of coal bearing rocks east of Paonia, showing the lower three members of the Mesaverde formation, the Rollins sandstone, the Bowie shale, which here contains seven beds of coal, the Paonia shale, containing three beds of coal. The basal sandstone is about 200 feet thick. Delta County, Colorado. 1907. Plate 7-B in U.S. Geological Survey. Bulletin 510. 1912. #1:/Colorado-Bulletin 510/lwt00323 ID. Lee, W.T. 323 Exposure of rocks north of Mount Gunnison, showing the basal conglomerate of the Wasatch ("Ruby") formation, the unconformity at the base Wasatch, the Ohio Creek conglomerate, the unconformity at its base and the upper or undifferentiated part of the Mesaverde formation. (Scale: the trees are 50 to 75 feet high.) Gunnison County, Colorado. 1907. Plate 6-A in U.S. Geological Survey. Bulletin 510. 1912. #1:/Colorado-Bulletin 510/lwt00431 ID. Lee, W.T. 431 Crested Butte, Gibson Ridge and Mount Wheatstone. The Crested Butte mine is located; the Porter at; the Bulkley mine at. Mount Wheatstone. (altitude 12, 543 feet), is a mass of porphyry intruded near base of the coal measures. The coal beds are upturned upon its flank. Gunnison County, Colorado. June, 30, 1909. Plate 13-A in U.S. Geological Survey. Bulletin 510. 1912. #1:/Colorado-Bulletin 510/lwt00440 ID. Lee, W.T. 440 Baxter basin near head of Slate River. The coal crop outs in the snow covered slope in the foreground. The "barren measures" overlying the coal beds appear in the cliffs. Gunnison County, Colorado. June, 20, 1909. Plate 13-A in U.S. Geological Survey. Bulletin 510. 1912. #1:/Colorado-Bulletin 510/lwt00445 ID. Lee, W.T. 445 Schuylkill Mountain, near head of Slate River. The outcrops of the coal beds are covered by the talus slopes shown in the foreground. The mountain consists of the unproductive measures overlying the coal. Fault has occurred at the points marked. Gunnison County, Colorado. 1907. Plate 13-B in U.S. Geological Survey. Bulletin 510. 1912. #1:/Colorado-Bulletin 510/lwt00455 ID. Lee, W.T. 455 Mount Carbon, a laccolith of porphyry intruded into the coal measures. Porphyry was intruded at about the horizon of coal and displaced some or all of the coal beds. The north slope at the right is probably the original upper surface of the intruded mass. At the extreme right the sedimentary rocks are upturned on the flanks of the laccolith. Gunnison County, Colorado. 1907. Plate 12-A in U.S. Geological Survey. Bulletin 510. 1912. #1:/Colorado-Bulletin 510/lwt00460 ID. Lee, W.T. 460 The Castle, a conspicuous promontory west of Mount Carbon, showing the bedded character of the West Elk breccia, which overlies the coal beds between Mount Carbon field and Coal Creek district. Gunnison County, Colorado. 1907. Plate 12-B in U.S. Geological Survey. Bulletin 510. 1912. #1:/Colorado-Bulletin 510/lwt00486 ID. Lee, W.T. 486 Robinson Canyon and Mount Gunnison. Mount Gunnison at left, showing the character of the slopes in which the coal beds outcrop. The smooth brush slope in foreground is formed on shale, which here contains seven beds of coal. The cliff above this slope makes the base of the unproductive measures overlying the coal. Gunnison County, Colorado. 1907. Plate 8-B in U.S. Geological Survey. Bulletin 510. 1912. #1:/Colorado-Bulletin 510/lwt00487 ID. Lee, W.T. 487 An intrusive sheet of igneous rock in Coal Creek canyon that has metamorphosed the under lying bed of coal. Gunnison County, Colorado. 1907. Plate 9-A in U.S. Geological Survey. Bulletin 510. 1912. #1:/Colorado-Bulletin 510/lwt00488 ID. Lee, W.T. 488 Cliff Creek canyon and Mount Lombard. The coal outcrops near the bottom of the canyon and extends under the igneous rocks about 6,000 feet below the top of the mountain. The stream of fragmental rocks is 1.5 miles long and makes a vertical descent of 4,800 feet. Gunnison County, Colorado. 1907. Plate 8-A, with diagram, in U.S. Geological Survey. Bulletin 510. 1912. #1:/Colorado-Bulletin 510/lwt00490 ID. Lee, W.T. 490 The Cliff, a sheet of igneous rock, about 1,000 feet thick intruded into the coal bearing formation in Coal Creek canyon. Coal Creek canyon and Mount Gunnison appear at the left. The outcrops of the coal are covered by the slide shown in the foreground. (Scale: The trees in the face of the cliff are about 50 feet high) Gunnison County, Colorado. 1907. Plate 9-B in U.S. Geological Survey. Bulletin 510. 1912. #1:/Colorado-Bulletin 510/lwt00499 ID. Lee, W.T. 499 Landslide in Coal Creek canyon. Showing the wooded condition of the surface in the coal-bearing zone. The coal beds, which elsewhere are obscured by the dense thickets of trees and brush, are exposed at this slide. (Scale: See the man on horseback at base of slide.) Gunnison County, Colorado. 1907. Plate 10 in U.S. Geological Survey. Bulletin 510. 1912. #1:/Colorado-Bulletin 510/lwt02717 ID. Lee, W.T. 2717 A fossil plant (Ficus speciosissima Ward) associated with the low grade bituminous and subbituminous coals of the Grand Mesa field. A fossil leaf common in the Paonia shale member of the Mesaverde formation. Fossil plant locality record of the U.S. Geological Survey No. 4352 (slightly reduced) Gunnison County, Colorado. 1907. Plate 19 in U.S. Geological Survey. Bulletin 510. 1912. #1:/Colorado-Bulletin 510/lwt02718 ID. Lee, W.T. 2718 Fossil plants associate with the low grade, bituminous and subbituminous coals of the Grand Mesa field (from the Paonia shale member of Mesaverde formation). Figure 1. (upper left); fragments of Myica torrey Lesq. (natural size) and Ficus specioissima Ward. Fossil plant locality record of the United States Geological Survey No. 4383. Figure 2. (lower right); Myrica torrey Lesq. Natural size. Figure 3 (center) Geonomites ungeri Lesq. Palm leaf. Natural size. Fossil plant locality record of the U.S. Geological Survey No. 4336. Gunnison County, Colorado. 1907. Plate 18 in U.S. Geological Survey. Bulletin 510. 1912. #1:/Alaska-Bulletin 526/pai00673 ID. Paige, S. 673 Edge of Columbia Glacier, shows, fluted moraine and overturned forest. Valdez district, Alaska Gulf region, Alaska. July 10, 1905. Plate 8-B in U.S. Geological Survey. Bulletin 526. 1913. #1:/Alaska-Bulletin 526/pai00686 ID. Paige, S. 686 East part of front of Barry Glacier from point A. Wells district, Alaska Gulf region, Alaska. August 20, 1905. Plate 19-A in U.S. Geological Survey. Bulletin 526. 1913. #1:/Alaska-Bulletin 526/pai00711 ID. Paige, S. 711 Center of Valdez Glacier looking southeast. Valdez district, Cook Inlet region, Alaska. July 1905. Plate 4-A in U.S. Geological Survey. Bulletin 526. 1913. #1:/Alaska-Bulletin 526/pai0711a ID. Paige, S. 711a West edge of front of Valdez Glacier. Valdez district, Cook Inlet region, Alaska. July 1905. Plate 4-A in U.S. Geological Survey. Bulletin 526. 1913. #1:/Colorado-Bulletin 510/stw00323 ID. Stanton, T.W. 323 Escarpment of coal bearing rocks, 3 miles south of Palisades, showing the Paonia shale member of the Mesaverde formation lying unconformably upon the Bowie shale member of the same formation. The rocks above contain coal associated with fossil plants and fresh water mollusks. The sandstone below contains marine shells. Mesa County, Colorado. 1907. Plate 5-B in U.S. Geological Survey. Bulletin 510. 1912. #1:/Philippines/gan00061 ID. Gannett, H. 61 Henry Gannett and party with military officers, on USS Ingalls. Philippines. 1900. #1:/Philippines/gan00152 ID. Gannett, H. 152 Governor Howard Taft, and party with military escort at Bagio. Philippines. 1900. #1:/Arizona/lwt00142 ID. Lee, W.T. 142 River view of Boulder (Hoover) dam site. Mohave County, Arizona. 1904. #1:/Alaska-Glaciers/pai00662 ID. Paige, S. 662 Alaska Glaciers. Panorama of Shoup Glacier front the right hand point is N. 40 degrees; the left hand is N. 66 degrees. Valdez district, Alaska Gulf region, Alaska. 1905. #1:/Alaska-Glaciers/pai00663 ID. Paige, S. 663 Alaska Glaciers. Panorama of Shoup Glacier front the right hand point is N. 40 degrees; the left hand is N. 66 degrees. Valdez district, Alaska Gulf region, Alaska. 1905. #1:/Alaska-Glaciers/pai00664 ID. Paige, S. 664 Alaska Glaciers. Panorama of Shoup Glacier front the right hand point is N. 40 degrees; the left hand is N. 66 degrees. Valdez district, Alaska Gulf region, Alaska. 1905. #1:/Alaska-Glaciers/pai00671 ID. Paige, S. 671 Alaska Glaciers. Front of Columbia Glacier, taken from small island on which the glacier rests, north of Heather Island, looking northeast. Valdez district, Alaska Gulf region, Alaska. 1905. #1:/Alaska-Glaciers/pai00674 ID. Paige, S. 674 Alaska Glaciers. Front of ice on small island that Columbia Glacier rests north of Heather Island. Valdez district, Alaska Gulf region, Alaska. 1905. #1:/Alaska-Glaciers/pai00684 ID. Paige, S. 684 Alaska Glaciers. Barry Glacier, Harriman Fiord. Wells district, Alaska Gulf region, Alaska. 1905. #1:/Alaska-Glaciers/pai00687 ID. Paige, S. 687 Alaska Glaciers. Harriman Fiord, showing Serpentine Glacier on the right, and Surprise Glacier on the left. Wells district, Alaska Gulf region, Alaska. 1905. #1:/Alaska-Glaciers/pai00688 ID. Paige, S. 688 Alaska Glaciers. Harriman Glacier, and Harriman Fiord. Wells district, Alaska Gulf region, Alaska. 1905. #1:/Alaska-Glaciers/pai00689 ID. Paige, S. 689 Alaska Glaciers. Southeast side of front of Harriman Glacier, Harriman Fiord. Wells district, Alaska Gulf region, Alaska. 1905. #1:/Alaska-Glaciers/pai00690 ID. Paige, S. 690 Alaska Glaciers. Harriman Glacier, terminus. Harriman Fiord. Wells district, Alaska Gulf region, Alaska. 1905. #1:/Alaska-Glaciers/pai00691 ID. Paige, S. 691 Alaska Glaciers. Harriman Glacier, terminus slightly to the left of Paige 690. Harriman Fiord. Wells district, Alaska Gulf region, Alaska. 1905. #1:/Alaska-Glaciers/pai00705 ID. Paige, S. 705 Alaska Glaciers. Part of the terminus of Shoup Glacier. Valdez district, Alaska Gulf region, Alaska. 1905. #1:/Alaska-Glaciers/pai00709 ID. Paige, S. 709 Alaska Glaciers. Crevasse in Valdez Glacier. Valdez district, Alaska Gulf region, Alaska. 1905. #1:/Alaska-Glaciers/pai00710 ID. Paige, S. 710 Alaska Glaciers. Looking up Valdez Glacier. Valdez district, Alaska Gulf region, Alaska. 1905. #1:/Alaska/pai00712 ID. Paige, S. 712 Part of Valdez destroyed by glacial waters. Valdez district, Alaska Gulf region, Alaska. 1905. #1:/Alaska-Glaciers/pai00732 ID. Paige, S. 732 Alaska Glaciers. Hanging glacier just northeast of Harriman Glacier. Wells district, Alaska Gulf region, Alaska. 1905. #1:/Alaska-Glaciers/pai00733 ID. Paige, S. 733 Alaska Glaciers. Hanging glacier just northeast of Harriman Glacier. Wells district, Alaska Gulf region, Alaska. 1905. #1:/Alaska-Glaciers/pai00771 ID. Paige, S. 771 Alaska Glaciers. Small glacier on side of Chickaloon Glacier, looking southeast. Matanuska district, Cook Inlet region, Alaska. 1905. #1:/Texas/rgb00106 ID. Richardson, G.B. 106 Fort Bliss, with officer quarters(?) in middle ground, Franklin Mountains in background. El Paso County, Texas. C. 1905. #1:/Colorado/rgb00263 ID. Richardson, G.B. 263 Panorama of Castlewood reservoir filled, looking northwesterly toward the dam. Douglas County, Colorado. 1910. #1:/Colorado/rgb00264 ID. Richardson, G.B. 264 Panorama of Castlewood reservoir filled, looking northwesterly toward the dam. Douglas County, Colorado. 1910. #1:/Alaska-Glacier Bay National Park/mdj01014 ID. Miller, D.J. 1014 Glacier Bay National Park and Preserve, Alaska. North Crillon Glacier, terminus and trimline,of Lituya Bay 1936 wave on Crillon Inlet. June 11, 1952. #1:/Alaska-Glacier Bay National Park/mdj01019 ID. Miller, D.J. 1019 Glacier Bay National Park and Preserve, Alaska. La Perouse Glacier front from north. June 21, 1952. #1:/Alaska-Glacier Bay National Park/mdj01020 ID. Miller, D.J. 1020 Glacier Bay National Park and Preserve, Alaska. North margins of La Perous Glacier at ocean beach. June 21, 1952. #1:/Alaska-Glacier Bay National Park/mdj01030 ID. Miller, D.J. 1030 Glacier Bay National Park and Preserve, Alaska. North shore of Lituya Bay showing wave trimlines of 1853-54 and 1936. #1:/Alaska-Glacier Bay National Park/mdj1030a ID. Miller, D.J. 1030a Glacier Bay National Park and Preserve, Alaska. North shore of Lituya Bay showing wave trimlines of 1853-54 and 1936. #1:/Alaska-Glacier Bay National Park/mdj1030c ID. Miller, D.J. 1030c Glacier Bay National Park and Preserve, Alaska. North shore of Lituya Bay showing wave trimlines of 1853-54 and 1936. #1:/Alaska-Glaciers/mdj01114 ID. Miller, D.J. 1114 Alaska-Glaciers. Guyot Glacier tidal front from ridge west of Icy Bay. Yakataga district, Alaska Gulf region, Alaska. June 29, 1953. #1:/Alaska/mdj01145 ID. Miller, D.J. 1145 Icebergs in lake at southern margin of Bering Glacier. Katalla district, Alaska Gulf region, Alaska. September 14, 1954. #1:/Alaska-Glaciers/mdj01156 ID. Miller, D.J. 1156 Alaska Glaciers. Folded moranic bands, Bering Glacier Katalla district, Alaska Gulf region, Alaska. September 16, 1954. #1:/Alaska-Glaciers/mdj01157 ID. Miller, D.J. 1157 Alaska Glaciers. Across Bering Glacier toward Mt. Tom White on the skyline. Katalla district, Alaska Gulf region, Alaska. September 16, 1954. #1:/Alaska-Glaciers/mdj01158 ID. Miller, D.J. 1158 Alaska Glaciers. Folded moranic bands, Malaspina Glacier, Mount St. Ellis on skyline. Yakutat district, Alaska Gulf region, Alaska. September 16, 1954. #1:/Alaska-Glacier Bay National Park/mdj01165 ID. Miller, D.J. 1165 Glacier Bay National Park and Preserve, Alaska. Panorama of outer part, north shore and head of Lituya Bay showing damage from 1958 giant wave. August 7, 1958. #1:/Alaska-Glacier Bay National Park/mdj01166 ID. Miller, D.J. 1166 Glacier Bay National Park and Preserve, Alaska. Panorama of outer part, north shore and head of Lituya Bay showing damage from 1958 giant wave. August 7, 1958. #1:/Alaska-Glacier Bay National Park/mdj01167 ID. Miller, D.J. 1167 Glacier Bay National Park and Preserve, Alaska. Panorama of outer part, north shore and head of Lituya Bay showing damage from 1958 giant wave. August 7, 1958. #1:/Alaska-Glacier Bay National Park/mdj01168 ID. Miller, D.J. 1168 Glacier Bay National Park and Preserve, Alaska. Panorama of outer part, north shore and head of Lituya Bay showing damage from 1958 giant wave. August 7, 1958. #1:/Alaska-Glacier Bay National Park/mdj01169 ID. Miller, D.J. 1169 Glacier Bay National Park and Preserve, Alaska. Panorama of outer part, north shore and head of Lituya Bay showing damage from 1958 giant wave. August 7, 1958. #1:/Alaska-Glacier Bay National Park/mdj01173 ID. Miller, D.J. 1173 Glacier Bay National Park and Preserve, Alaska. Panorama of south shore and outer part of Lituya Bay, showing damage from 1958 giant wave. August 7, 1958. #1:/Alaska-Glacier Bay National Park/mdj01174 ID. Miller, D.J. 1174 Glacier Bay National Park and Preserve, Alaska. Panorama of south shore and outer part of Lituya Bay, showing damage from 1958 giant wave. August 7, 1958. #1:/Alaska-Glacier Bay National Park/mdj01175 ID. Miller, D.J. 1175 Glacier Bay National Park and Preserve, Alaska. Panorama of south shore and outer part of Lituya Bay, showing damage from 1958 giant wave. August 7, 1958. #1:/Alaska-Glacier Bay National Park/mdj01178 ID. Miller, D.J. 1178 Glacier Bay National Park and Preserve, Alaska. 1958 Wave trimline on spur southwest of Gilbert Inlet. August 7, 1958. #1:/Miller D.J. Collection-Southeast Alaska Earthquake, July 10, 1958/mdj1178a ID. Miller, D.J. 1178a Trees washed out and turned upslope by water at altitude of 1,720 feet. Small slides occurred on steep slope at right during the 1958 earthquake, but destruction of forest in middle and lower left part of view is due mainly to water. Lituya district, Alaska Gulf region, Alaska. Glacier Bay National Park and Preserve. Plate 7-A in U.S. Geological Survey. Professional paper 354-C. 1960. #1:/Alaska-Glacier Bay National Park/mdj01266 ID. Miller, D.J. 1266 Glacier Bay National Park and Preserve, Alaska. Sequence of aerial views along coast from Icy Point to Lituya Bay; marine terraces, La Perouse Glacier, Crillon Lake, Mount Fairweather. August 29, 1958. #1:/Alaska-Glacier Bay National Park/mdj01267 ID. Miller, D.J. 1267 Glacier Bay National Park and Preserve, Alaska. Sequence of aerial views along coast from Icy Point to Lituya Bay; marine terraces, La Perouse Glacier, Crillon Lake, Mount Fairweather. August 29, 1958. #1:/Alaska-Glacier Bay National Park/mdj01268 ID. Miller, D.J. 1268 Glacier Bay National Park and Preserve, Alaska. Sequence of aerial views along coast from Icy Point to Lituya Bay; marine terraces, La Perouse Glacier, Crillon Lake, Mount Fairweather. August 29, 1958. #1:/Alaska-Glacier Bay National Park/mdj01270 ID. Miller, D.J. 1270 Glacier Bay National Park and Preserve, Alaska. Sequence of aerial views along coast from Icy Point to Lituya Bay; marine terraces, La Perouse Glacier, Crillon Lake, Mount Fairweather. August 29, 1958. #1:/Alaska-Glacier Bay National Park/mdj01271 ID. Miller, D.J. 1271 Glacier Bay National Park and Preserve, Alaska. Sequence of aerial views along coast from Icy Point to Lituya Bay; marine terraces, La Perouse Glacier, Crillon Lake, Mount Fairweather. August 29, 1958. #1:/Alaska-Glacier Bay National Park/mdj01272 ID. Miller, D.J. 1272 Glacier Bay National Park and Preserve, Alaska. Sequence of aerial views along coast from Icy Point to Lituya Bay; marine terraces, La Perouse Glacier, Crillon Lake, Mount Fairweather. August 29, 1958. #1:/Alaska-Glacier Bay National Park/mdj01273 ID. Miller, D.J. 1273 Glacier Bay National Park and Preserve, Alaska. Sequence of aerial views along coast from Icy Point to Lituya Bay; marine terraces, La Perouse Glacier, Crillon Lake, Mount Fairweather. August 29, 1958. #1:/Alaska-Glacier Bay National Park/mdj01274 ID. Miller, D.J. 1274 Glacier Bay National Park and Preserve, Alaska. Sequence of aerial views along coast from Icy Point to Lituya Bay; marine terraces, La Perouse Glacier, Crillon Lake, Mount Fairweather. August 29, 1958. #1:/Alaska-Glacier Bay National Park/mdj01291 ID. Miller, D.J. 1291 Glacier Bay National Park and Preserve, Alaska. Panorama of head and north shore Lituya Bay, showing rockslide scar and 1958-wave damage. August 29, 1958. #1:/Alaska-Glacier Bay National Park/mdj01292 ID. Miller, D.J. 1292 Glacier Bay National Park and Preserve, Alaska. Panorama of head and north shore Lituya Bay, showing rockslide scar and 1958-wave damage. August 29, 1958. #1:/Alaska-Glacier Bay National Park/mdj01293 ID. Miller, D.J. 1293 Glacier Bay National Park and Preserve, Alaska. Panorama of head and north shore Lituya Bay, showing rockslide scar and 1958-wave damage. August 29, 1958. #1:/Alaska-Glacier Bay National Park/mdj01313 ID. Miller, D.J. 1313 Glacier Bay National Park and Preserve, Alaska. Front of Lituya Glacier, from spur southwest of Gilbert Inlet, Lituya Bay. August 31, 1958. #1:/Alaska-Glacier Bay National Park/mdj01325 ID. Miller, D.J. 1325 Glacier Bay National Park and Preserve, Alaska. Northwest of Gilbert Inlet and front of Lituya Glacier 2 days before the 1958 earthquake and wave. July 7, 1958. #1:/Alaska-Glacier Bay National Park/mdj01326 ID. Miller, D.J. 1326 Glacier Bay National Park and Preserve, Alaska. Northwest of Gilbert Inlet and front of Lituya Glacier 2 days before the 1958 earthquake and wave. July 7, 1958. #1:/Alaska-Glaciers/mdj01351 ID. Miller, D.J. 1351 Alaska Glaciers. East of Thompson Ridge showing lateral moraines formed by late Wisconsin(?) and Recent advances of the Tana Glacier. Chitina district, Alaska Gulf region, Alaska. August 20, 1958. #1:/Alaska/mdj01352 ID. Miller, D.J. 1352 Aerial view east showing valley of Granite Creek and Ross Green Lake, on left, and Thompson Ridge on right. Chitina district, Alaska Gulf region, Alaska. August 20, 1958. #1:/Alaska-Glacier Bay National Park/rjc00231 ID. Reed, J.C. 231 Glacier Bay National Park and Preserve, Alaska. Muir Glacier from rock monument on moraine south of nunatak at east side of glacier. August 18, 1936. #1:/Alaska-Glacier Bay National Park/rjc00232 ID. Reed, J.C. 232 Glacier Bay National Park and Preserve, Alaska. "Dead ice" east of nunatak at east side of Muir Glacier, from a top nunatak. August 18, 1936. #1:/Alaska-Glacier Bay National Park/rjc00234 ID. Reed, J.C. 234 Glacier Bay National Park and Preserve, Alaska. Muir Glacier from top of nunatak. August 18, 1936. #1:/Alaska-Glacier Bay National Park/rjc00235 ID. Reed, J.C. 235 Glacier Bay National Park and Preserve, Alaska. Muir Glacier from top of nunatak. August 18, 1936. #1:/Alaska-Glacier Bay National Park/rjc00236 ID. Reed, J.C. 236 Glacier Bay National Park and Preserve, Alaska. "Dead ice" east of nunatak, east side of Muir Glacier. August 18, 1936. #1:/Alaska-Glacier Bay National Park/rjc00239 ID. Reed, J.C. 239 Glacier Bay National Park and Preserve, Alaska. End of Reid Glacier from about ½ mile below it on west side. Note icebergs stranded (at) low tide. August 8, 1936. #1:/Alaska-Glacier Bay National Park/rjc00240 ID. Reed, J.C. 240 Glacier Bay National Park and Preserve, Alaska. Reid Inlet from mountain side west of Reid Glacier, note stranded bergs, from Reid Glacier. August 8, 1936. #1:/Alaska-Glacier Bay National Park/rjc00241 ID. Reed, J.C. 241 Glacier Bay National Park and Preserve, Alaska. Front of Reid Glacier from mountainside west of it. August 8, 1936. #1:/Alaska-Glacier Bay National Park/rjc00243 ID. Reed, J.C. 243 Glacier Bay National Park and Preserve, Alaska. Across front of Reid Glacier from west side. August 8, 1936. #1:/Alaska-Glacier Bay National Park/rjc00244 ID. Reed, J.C. 244 Glacier Bay National Park and Preserve, Alaska. Across front of Reid Glacier from west mountainside. August 8, 1936. #1:/Alaska-Glacier Bay National Park/rjc00247 ID. Reed, J.C. 247 Glacier Bay National Park and Preserve, Alaska. Part of Margerie Glacier from Tarr Inlet. August 19, 1936. #1:/Alaska-Glacier Bay National Park/rjc00268 ID. Reed, J.C. 268 Glacier Bay National Park and Preserve, Alaska. Up inlet from north to Garford island, probably toward Casement Glacier. August 18, 1936. #1:/Alaska/rjc00354 ID. Reed, J.C. 354 Oblique aerial of mountains between Warm Springs and Sitka, Baranof Island. Baranof district, Southeastern Alaska region, Alaska. 1938. #1:/Alaska/rjc00355 ID. Reed, J.C. 355 Mountains between Warm Springs and Sitka, Baranof Island. Baranof district, Southeastern Alaska region, Alaska. 1938. #1:/Alaska-Glacier Bay National Park/rjc00650 ID. Reed, J.C. 650 Glacier Bay National Park and Preserve, Alaska. Six different views about head of Muir Inlet. July 16, 1941. #1:/Alaska-Glacier Bay National Park/rjc00651 ID. Reed, J.C. 651 Glacier Bay National Park and Preserve, Alaska. Six different views about head of Muir Inlet. July 16, 1941. #1:/Alaska-Glacier Bay National Park/rjc00652 ID. Reed, J.C. 652 Glacier Bay National Park and Preserve, Alaska. Six different views about head of Muir Inlet. July 16, 1941. #1:/Alaska-Glacier Bay National Park/rjc00653 ID. Reed, J.C. 653 Glacier Bay National Park and Preserve, Alaska. Six different views about head of Muir Inlet. July 16, 1941. #1:/Alaska-Glacier Bay National Park/rjc00654 ID. Reed, J.C. 654 Glacier Bay National Park and Preserve, Alaska. Six different views about head of Muir Inlet. July 16, 1941. #1:/Alaska-Glacier Bay National Park/rjc00655 ID. Reed, J.C. 655 Glacier Bay National Park and Preserve, Alaska. Six different views about head of Muir Inlet. July 16, 1941. #1:/Alaska-Glacier Bay National Park/rjc00660 ID. Reed, J.C. 660 Glacier Bay National Park and Preserve, Alaska. East side face of Muir Glacier. July 16, 1941. #1:/Alaska-Glacier Bay National Park/rjc00661 ID. Reed, J.C. 661 Glacier Bay National Park and Preserve, Alaska. Nunatak from Muir Inlet, view eastward. July 16, 1941. #1:/Alaska-Glacier Bay National Park/rjc00662 ID. Reed, J.C. 662 Glacier Bay National Park and Preserve, Alaska. Southward across Geikie River just above head of Geikie Inlet. July 11, 1941. #1:/Alaska-Glacier Bay National Park/rjc00666 ID. Reed, J.C. 666 Glacier Bay National Park and Preserve, Alaska. Southeast over head of Geikie Inlet, boat "Sylph" at anchor in middle ground. July 11, 1941. #1:/Alaska-Glaciers/rjc00674 ID. Reed, J.C. 674 Alaska Glaciers. Down Chichamin Glacier from Thornton Cabin. Hyder distict, Southeastern Alaska region, Alaska. August 23, 1941. #1:/Alaska-Glaciers/rjc00675 ID. Reed, J.C. 675 Alaska Glaciers. Head of Chickamin Glacier from Thornton prospect. Hyder distict, Southeastern Alaska region, Alaska. August 23, 1941. #1:/Alaska-Glaciers/rjc00678 ID. Reed, J.C. 678 Alaska Glaciers. Head of Chickamin Glacier from Thornton prospect. Hyder distict, Southeastern Alaska region, Alaska. August 23, 1941. #1:/Alaska-Glacier Bay National Park/rjc00697 ID. Reed, J.C. 697 Glacier Bay National Park and Preserve, Alaska. Head of Muir Inlet from near Adams Inlet. 1942. #1:/Alaska-Glacier Bay National Park/rjc00714 ID. Reed, J.C. 714 Glacier Bay National Park and Preserve, Alaska. Part of terminus of Grand Pacific Glacier, along international boundary. 1942. #1:/Alaska-Glacier Bay National Park/rjc00716 ID. Reed, J.C. 716 Glacier Bay National Park and Preserve, Alaska. Part of terminus of Grand Pacific, from the west side. July 29, 1942. #1:/Alaska-Glacier Bay National Park/rjc00717 ID. Reed, J.C. 717 Glacier Bay National Park and Preserve, Alaska. Head of Reid inlet. July 29, 1942. #1:/Alaska-Glacier Bay National Park/rjc00718 ID. Reed, J.C. 718 Glacier Bay National Park and Preserve, Alaska. De Margerie Glacier from Tarr Inlet. 1942. #1:/Alaska-Glacier Bay National Park/rjc00720 ID. Reed, J.C. 720 Glacier Bay National Park and Preserve, Alaska. John Hopkins Glacier from west side. 1942. #1:/Alaska-Glacier Bay National Park/rjc00721 ID. Reed, J.C. 721 Glacier Bay National Park and Preserve, Alaska. John Hopkins Glacier from east side. 1942. #1:/Alaska-Glacier Bay National Park/rjc00722 ID. Reed, J.C. 722 Glacier Bay National Park and Preserve, Alaska. John Hopkins Glacier from west side. 1942. #1:/Alaska-Glaciers/rjc00782 ID. Reed, J.C. 782 Alaska Glaciers. Moraines on Bering Glacier. Katalla district, Alaska Gulf region, Alaska. 1948. #1:/Alaska-Glacier Bay National Park/rjc00784 ID. Reed, J.C. 784 Glacier Bay National Park and Preserve, Alaska. Muir Glacier, terminus. 1948. #1:/Glacier Bay National Park and Preserve/mjb00620 ID. Mertie, J.B. 620 Glacier Bay National Park and Preserve, Alaska. Lituya Glacier, viewed from an elevation of 1,650 feet on a mud slide. July 23, 1917. #1:/Alaska-Glacier Bay National Park/mjb00622 ID. Mertie, J.B. 622 Glacier Bay National Park and Preserve, Alaska. Glacier viewed from mountain at head of Mud Slide. July 23, 1917 #1:/Alaska-Glacier Bay National Park/mjb00623 ID. Mertie, J.B. 623 Glacier Bay National Park and Preserve, Alaska. Across terminus of Lituya Glacier from mountain at head of Mud Slide. July 23, 1917. #1:/Alaska-Glacier Bay National Park/mjb00624 ID. Mertie, J.B. 624 Glacier Bay National Park and Preserve, Alaska. End of glacier at head of east arm of Lituya Bay, from mountain at head of Mud Slide. July 23, 1917. #1:/Alaska-Glacier Bay National Park/mjb00722 ID. Mertie, J.B. 722 Glacier Bay National Park and Preserve, Alaska. Panorama of front of Hugh Miller Glacier, July 28, 1919. #1:/Alaska-Glacier Bay National Park/mjb00727 ID. Mertie, J.B. 727 Glacier Bay National Park and Preserve, Alaska. Front of south fork of Charpentier Glacier, July 28, 1919. #1:/Alaska-Glacier Bay National Park/mjb00728 ID. Mertie, J.B. 728 Glacier Bay National Park and Preserve, Alaska. Front of Favorite Glacier, July 28, 1919. #1:/Alaska-Glacier Bay National Park/mjb00729 ID. Mertie, J.B. 729 Glacier Bay National Park and Preserve, Alaska. Closer view of front of Favorite Glacier, July 28, 1919. #1:/Alaska-Glacier Bay National Park/mjb00734 ID. Mertie, J.B. 734 Glacier Bay National Park and Preserve, Alaska. Geikie Glacier, showing gravel on each side and delta in front. August 2, 1919. #1:/Alaska-Glacier Bay National Park/mjb00736 ID. Mertie, J.B. 736 Glacier Bay National Park and Preserve, Alaska. Near view of Geikie Glacier, showing gravel banks and non-tidal conditions of the glacier. August 2, 1919. #1:/Alaska-Glacier Bay National Park/mjb00738 ID. Mertie, J.B. 738 Glacier Bay National Park and Preserve, Alaska. Geikie Inlet, showing gravel terrace at head of inlet and beveled mountain tops at lower end of inlet. August 2, 1919. #1:/Alaska-Glacier Bay National Park/mjb00741 ID. Mertie, J.B. 741 Glacier Bay National Park and Preserve, Alaska. Hanging glacier formerly tributary to Geikie Glacier view looking west. August 2, 1919. #1:/Alaska-Glacier Bay National Park/mjb00742 ID. Mertie, J.B. 742 Glacier Bay National Park and Preserve, Alaska. Panorama showing gravel banks at southwest end of Geikie Glacier, from southwest of glacier. August 2, 1919. #1:/Alaska-Glacier Bay National Park/mjb00743 ID. Mertie, J.B. 743 Glacier Bay National Park and Preserve, Alaska. Panorama showing gravel banks at southwest end of Geikie Glacier, from southwest of glacier. August 2, 1919. #1:/Alaska-Glacier Bay National Park/mjb00749 ID. Mertie, J.B. 749 Glacier Bay National Park and Preserve, Alaska. Rendu Inlet and Glacier. August 3, 1919. #1:/Alaska-Glacier Bay National Park/mjb00751 ID. Mertie, J.B. 751 Glacier Bay National Park and Preserve, Alaska. Rendu Glacier. August 3, 1919. #1:/Alaska-Glacier Bay National Park/mjb00752 ID. Mertie, J.B. 752 Glacier Bay National Park and Preserve, Alaska. Glacial valley opposite Composite Island. August 3, 1919. #1:/Alaska-Glacier Bay National Park/mjb00753 ID. Mertie, J.B. 753 Glacier Bay National Park and Preserve, Alaska. Carroll Glacier from lower end of Queen Inlet. August 3, 1919. #1:/Alaska-Glacier Bay National Park/mjb00754 ID. Mertie, J.B. 754 Glacier Bay National Park and Preserve, Alaska. Carroll Glacier, Queen Inlet. August 3, 1919. #1:/Alaska-Glacier Bay National Park/mjb00773 ID. Mertie, J.B. 773 Glacier Bay National Park and Preserve, Alaska. Upper part of Reid Inlet, looking toward Grand Pacific Glacier in the distance. August 6, 1919. #1:/Alaska-Glacier Bay National Park/mjb00774 ID. Mertie, J.B. 774 Glacier Bay National Park and Preserve, Alaska. Reid Glacier. August 6, 1919. #1:/Alaska-Glacier Bay National Park/mjb00776 ID. Mertie, J.B. 776 Glacier Bay National Park and Preserve, Alaska. Panorama of Reid Glacier front. August 6, 1919. #1:/Alaska-Glacier Bay National Park/mjb00777 ID. Mertie, J.B. 777 Glacier Bay National Park and Preserve, Alaska. Panorama of Reid Glacier front. August 6, 1919. #1:/Alaska-Glacier Bay National Park/mjb00782 ID. Mertie, J.B. 782 Glacier Bay National Park and Preserve, Alaska. Morse Glacier, from Muir Inlet. August 11, 1919. #1:/Alaska-Glacier Bay National Park/mjb00784 ID. Mertie, J.B. 784 Glacier Bay National Park and Preserve, Alaska. Morse Glacier from Reid "G" station. August 11, 1919. #1:/Alaska-Glacier Bay National Park/mjb00786 ID. Mertie, J.B. 786 Glacier Bay National Park and Preserve, Alaska. Panorama of Adams Glacier. August 11, 1919. #1:/Alaska-Glacier Bay National Park/mjb00787 ID. Mertie, J.B. 787 Glacier Bay National Park and Preserve, Alaska. Panorama of Adams Glacier. August 11, 1919. #1:/Alaska-Glacier Bay National Park/mjb00788 ID. Mertie, J.B. 788 Glacier Bay National Park and Preserve, Alaska. Panorama of Adams Glacier. August 11, 1919. #1:/Alaska-Glacier Bay National Park/mjb00789 ID. Mertie, J.B. 789 Glacier Bay National Park and Preserve, Alaska. Panorama of Adams Glacier. August 11, 1919. #1:/Alaska-Glacier Bay National Park/mjb00790 ID. Mertie, J.B. 790 Glacier Bay National Park and Preserve, Alaska. Panorama of Muir and Casement Glaciers from Muir Inlet. August 11, 1919. #1:/Alaska-Glacier Bay National Park/mjb00791 ID. Mertie, J.B. 791 Glacier Bay National Park and Preserve, Alaska. Panorama of Muir and Casement Glaciers from Muir Inlet. August 11, 1919. #1:/Alaska-Glacier Bay National Park/mjb00792 ID. Mertie, J.B. 792 Glacier Bay National Park and Preserve, Alaska. Panorama of Cushing Plateau, Muir and Casement Glacier from Muir Inlet. August 11, 1919. #1:/Alaska-Glacier Bay National Park/mjb00793 ID. Mertie, J.B. 793 Glacier Bay National Park and Preserve, Alaska. Panorama of Cushing Plateau, Muir and Casement Glacier from Muir Inlet. August 11, 1919. #1:/Alaska-Glacier Bay National Park/mjb00794 ID. Mertie, J.B. 794 Glacier Bay National Park and Preserve, Alaska. Panorama of Cushing Plateau, Muir and Casement Glacier from Muir Inlet. August 11, 1919. #1:/Alaska-Glacier Bay National Park/mjb00795 ID. Mertie, J.B. 795 Glacier Bay National Park and Preserve, Alaska. Panorama of Cushing Plateau, Muir and Casement Glacier from Muir Inlet. August 11, 1919. #1:/Alaska-Glacier Bay National Park/mjb00796 ID. Mertie, J.B. 796 Glacier Bay National Park and Preserve, Alaska. Panorama of Cushing Plateau, Muir and Casement Glacier from Muir Inlet. August 11, 1919. #1:/Alaska-Glacier Bay National Park/mjb00797 ID. Mertie, J.B. 797 Glacier Bay National Park and Preserve, Alaska. Panorama of Cushing Plateau, Muir and Casement Glacier from Muir Inlet. August 11, 1919.d Casement Glacier from Muir Inlet. August 11, 1919. #1:/Alaska-Glacier Bay National Park/mjb00798 ID. Mertie, J.B. 798 Glacier Bay National Park and Preserve, Alaska. Panorama of Muir Glacier from Muir Inlet. August 11, 1919. #1:/Alaska-Glacier Bay National Park/mjb00799 ID. Mertie, J.B. 799 Glacier Bay National Park and Preserve, Alaska. Panorama of Muir Glacier from Muir Inlet. August 11, 1919. #1:/Alaska-Glacier Bay National Park/mjb00800 ID. Mertie, J.B. 800 Glacier Bay National Park and Preserve, Alaska. Panorama of Muir Glacier from Muir Inlet. August 11, 1919. #1:/Alaska-Glacier Bay National Park/mjb00801 ID. Mertie, J.B. 801 Glacier Bay National Park and Preserve, Alaska. Panorama of Muir Glacier from Muir Inlet. August 11, 1919. #1:/Alaska-Glacier Bay National Park/mjb00802 ID. Mertie, J.B. 802 Glacier Bay National Park and Preserve, Alaska. Panorama of Muir Glacier from Muir Inlet. August 11, 1919. #1:/Alaska-Glacier Bay National Park/mjb00806 ID. Mertie, J.B. 806 Glacier Bay National Park and Preserve. Alaska. July 29, 1919. #1:/Alaska-Glacier Bay National Park/mjb00807 ID. Mertie, J.B. 807 Glacier Bay National Park and Preserve. Alaska. Rendu Glacier from prominent limestone knoll on east side of Rendu Inlet. Reid's old photographic station. August 3, 1919. #1:/Alaska-Glacier Bay National Park/mjb00808 ID. Mertie, J.B. 808 Glacier Bay National Park and Preserve, Alaska. Rendu Glacier from prominent limestone knoll on east side of Rendu Inlet; Reid's old photographic station. August 3, 1919. #1:/Alaska-Glacier Bay National Park/mjb00809 ID. Mertie, J.B. 809 Glacier Bay National Park and Preserve, Alaska. Rendu Glacier from mouth of stream on west side Rendu Inlet opposite limestone knoll; Reid's old photographic station. August 3, 1919. #1:/Alaska-Glacier Bay National Park/mjb00810 ID. Mertie, J.B. 810 Glacier Bay National Park and Preserve, Alaska. Carroll Glacier from Triangle Island in Queen Inlet. August 3, 1919. #1:/Alaska-Glacier Bay National Park/mjb00811 ID. Mertie, J.B. 811 Glacier Bay National Park and Preserve, Alaska. Carroll Glacier from gravel bar at mouth of stream shown on right side of photo 810, Queen Inlet. August 3, 1919. #1:/Alaska-Glaciers/mjb02287 ID. Mertie, J.B. 2287 Alaska Glaciers. Mendenhall Glacier. Juneau district, Southeastern Alaska region, June 8, 1937. #1:/Vermont-Bulletin 521/dtn00249 ID. Dale, T.N. 249 Rough block of hematitic dolomite marble from Swanton. Cut across the bed. The ground is bright reddish. Hammer is 18 inches long. Franklin County, Vermont. C. 1900. Plate 5- B in U.S. Geological Survey. Bulletin 521. 1912 #1:/Vermont-Bulletin 521/dtn00251 ID. Dale, T.N. 251 Polished pilasters of actinolitic calcite marble from "Green bed" Valley quarry. South Dorset. Showing some brecciation along the strike. Length 11 feet 3 inches, width 20 inches. Bennington County, Vermont. C. 1900. Plate 7-B in U.S. Geological Survey. Bulletin 521. 1912 #1:/Vermont-Bulletin 521/dtn00252 ID. Dale, T.N. 252 Tunnel of New York quarry, Dorset Mountain, Danby, from the northeast; showing two sets of joints at the left of the tunnel due to a trap dike at the south (not in photo). The marble at the tunnel and north of it is free from joints. Rutland County, Vermont. C. 1900. Plate 10-B in U.S. Geological Survey. Bulletin 521. 1912. #1:/Vermont-Bulletin 521/dtn00254 ID. Dale, T.N. 254 Recently uncovered glaciated beds of graphitic calcite marble at Florentine, Pittsford, looking southeast, nearly along the strike of the beds. Rutland County, Vermont. C. 1900. Plate 15-B in U.S. Geological Survey. Bulletin 521. 1912. #1:/Vermont-Bulletin 521/dtn00255 ID. Dale, T.N. 255 Effect of underground solution, south wall of Florence No.1 quarry, Pittsford, the lower cave is 15 feet long. The smaller ones are along a bedding plane. Rutland County, Vermont. C. 1900. Plate 17 in U.S. Geological Survey. Bulletin 521. 1912. #1:/Vermont-Bulletin 521/dtn00256 ID. Dale, T.N. 256 South wall of True Blue quarry, west Rutland: Westward-dipping beds of graphitic calcite and dolomite marble. The upper part of the 15-foot bed, consisting of very dark dolomite veined with calcite and quartz, passes into a series of nodules. The lower part of the bed seems to have been cut of by a fault parallel to the eastward-dipping cleavage. The large nodule is 3 by 2 feet. Rutland County, Vermont. C. 1900. Plate 15-A in U.S. Geological Survey. Bulletin 521. 1912. #1:/Vermont-Bulletin 521/dtn00257 ID. Dale, T.N. 257 Sawn slab of graphitic calcite marble from the True Blue Quarry west of Rutland. Showing planes of bedding and slip cleavage laden with graphite. The beds are inclined to the left and the cleavage to the right. Hammer is 18 inches long. Rutland County, Vermont. C. 1900. Plate 5-A in U.S. Geological Survey. Bulletin 521. 1912. #1:/Vermont-Bulletin 521/dtn00259 ID. Dale, T.N. 259 Polished slab of plicated muscovitic calcite marble from west Rutland. Rutland County, Vermont. C. 1900. Plate 6-A in U.S. Geological Survey. Bulletin 521. 1912. #1:/Vermont-Bulletin 521/dtn00262 ID. Dale, T.N. 262 Polished slab of plicated clouded calcite marble from the New Hollister quarry, Pittsford. The darker parts are graphitic and slightly dolomitic. Hammer is 18 inches long. Rutland County, Vermont. C. 1900. Plate 6-B in U.S. Geological Survey. Bulletin 521. 1912. #1:/Vermont-Bulletin 521/dtn00263 ID. Dale, T.N. 263 The south wall of the Gilson quarry, west Rutland, at a point 70 feet below the surface, showing part of the east limb of the West Rutland anticline and three of the quarry opening; Vertical black streaks at the left due to smoke. Rutland County, Vermont. C. 1900. Plate 12 in U.S. Geological Survey. Bulletin 521. 1912. #1:/Vermont-Bulletin 521/dtn00265 ID. Dale, T.N. 265 From point near Pittsford, across the marble belt, looking northwest across Otter Creek valley, showing the Taconic Range (schist) and the marble mill at Fowler. The marble belt occupies the space between the mill and range. Rutland County, Vermont. C. 1900. Plate 9 in U.S. Geological Survey. Bulletin 521. 1912. #1:/Vermont-Bulletin 521/dtn00266 ID. Dale, T.N. 266 Left to right: Polished specimen of brecciated calcite and dolomite marble from Dyer quarry, Manchester. The cement is bright reddish and the fragments are bluish gray or cream-colored. The dark one with light vein is dull reddish brown. Sawn specimen of graphitic calcite marble from Albertson quarry, west Rutland, showing plicated bedding planes running lengthwise, crossed by planes of slip cleavage inclined to the right, both laden with graphite. Vermont. C. 1900. Plate 8-B in U.S. Geological Survey. Bulletin 521. 1912. #1:/Vermont-Bulletin 521/dtn00267 ID. Dale, T.N. 267 Left to right: Serpentine from Roxbury, showing veining. "Kiel's green marble, from Eastman quarry, west Rutland; alternating beds of cream-colored calcite marble and dark green muscovitic and chloritic marble, both plicated and crossed by slip cleavage. "Jasper" marble from Swanton; the ground is bright-reddish quartoze hematitic untwined dolomite. The white objects are distorted and brecciated corals of twinned and untwined dolomite and quartz. Vermont. C. 1900. Plate 8-A in U.S. Geological Survey. Bulletin 521. 1912. #1:/Alaska-Bulletin 502/knop0056 ID. Knopf, A. 56 Goat Creek and Glacier Lake. Juneau district. Southeastern Alaska region, Alaska. 1909. Plate 3-A in U.S. Geological Survey. Bulletin 502. 1912. #1:/Alaska-Bulletin 502/knop0063 ID. Knopf, A. 63 Head of Eagle River. Juneau district. Southeastern Alaska region, Alaska. 1909. Plate 3- B in U.S. Geological Survey. Bulletin 502. 1912. #1:/Montana-Bulletin 502/knop0070 ID. Knopf, A. 70 Jointing in granite south of Boulder. Jefferson County, Montana. C. 1910. Plate 2-B in U.S. Geological Survey. Bulletin 527. 1913. #1:/Montana-Bulletin 502/knop0075 ID. Knopf, A. 75 Stratified andesite breccias forming scarp on Cliff Mountain. Flathead County, Montana. C. 1910. Plate 2-A in U.S. Geological Survey. Bulletin 527. 1913. #1:/Alaska-Bulletin 532/mag00002 ID. Maddren, A.G. 2 Weathering and wind erosion of granite at head of Dall River. Dall district, Yukon region, Alaska. 1911. Plate 3-A in U.S. Geological Survey. Bulletin 532. 1913. #1:/Alaska-Bulletin 532/mag00003 ID. Maddren, A.G. 3 Hodzana highland, incised by upper valley of Fish Creek. Yukon Flats district, Yukon region, Alaska. 1911. Plate 2-A in U.S. Geological Survey. Bulletin 532. 1913. #1:/Alaska-Bulletin 532/mag00007 ID. Maddren, A.G. 7 Mountainous portion of Hodzana highland, looking south between upper forks of Bonanza Creek. Dall district, Yukon region, Alaska. 1911. Plate 2-B in U.S. Geological Survey. Bulletin 532. 1913. #1:/Alaska-Bulletin 532/mag00019 ID. Maddren, A.G. 19 Horses towing freight scow between Bettles and Nolan, on Middle Fork of Koyukuk River. Wiseman district, Yukon region, Alaska. 1911. Plate 8-A in U.S. Geological Survey. Bulletin 532. 1913. #1:/Alaska-Bulletin 532/mag00022 ID. Maddren, A.G. 22 Gold Creek valley near mouth, looking upstream from top of canyon; shoulders indicate old valley floor level, now dissected by recent V-shaped valley. Chandalar district, Yukon region, Alaska. 1911. Plate 7-B in U.S. Geological Survey. Bulletin 532. 1913. #1:/Alaska-Bulletin 532/mag00029 ID. Maddren, A.G. 29 Limestone cliffs south of Bettles River, a possible fault scarp. Wiseman district, Yukon region, Alaska. 1911. Plate 6-B in U.S. Geological Survey. Bulletin 532. 1913. #1:/Alaska-Bulletin 532/mag00037 ID. Maddren, A.G. 37 Nolan Creek valley, showing boiler house and dumps, looking downstream from upper end of claim "No. 3 below"; mountains forming south slope of Wiseman Valley in background. Wiseman district, Yukon region, Alaska. 1911. Plate 9-B in U.S. Geological Survey. Bulletin 532. 1913. #1:/Alaska-Bulletin 532/mag00039 ID. Maddren, A.G. 39 Nolan Creek valley, showing principal mining plants, looking upstream from east side of the valley opposite claim "no. 6 below. Wiseman district, Yukon region, Alaska. 1911. Plate 9-A in U.S. Geological Survey. Bulletin 532. 1913. #1:/Alaska-Bulletin 532/mag00045 ID. Maddren, A.G. 45 Myrtle Creek valley, looking upstream from bench of claim No. 6., hydraulic ditch along left slope. Wiseman district, Yukon region, Alaska. 1911. Plate 8-B in U.S. Geological Survey. Bulletin 532. 1913. #1:/Virginia-Bulletin 509/swt00213 ID. Schaller, W.T. 213 Crystalized turquoise, natural size, Virgina. 1910. Plate 1-A in U.S. Geological Survey. Bulletin 509. 1912. #1:/Utah-Bulletin 509/swt00214 ID. Schaller, W.T. 214 Variscite nodule, on the left, an aggregate of crystals; on the right, ordinary compact phase. Natural size. Utah. 1910. Plate 1-B in U.S. Geological Survey. Bulletin 509. 1912. #1:/Utah-Bulletin 509/swt00216 ID. Schaller, W.T. 216 Variscite crystals in a cavity of aggregate crystals; enlarge 6 diameters. Utah. Plate 1-C in U.S. Geological Survey. Bulletin 509. 1912. #1:/Idaho-Bulletin 528/ujb00001 ID. Umpleby, J.B. 1 Salmon City, Beaverhead Mountains in the distance. Lemhi County, Idaho. 1910. Plate 2- B in U.S. Geological Survey. Bulletin 528. 1913. #1:/Idaho-Bulletin 528/ujb00005 ID. Umpleby, J.B. 5 Salmon Canyon below Shoup. Lemhi County, Idaho. 1910. Plate 2-A in U.S. Geological Survey. Bulletin 528. 1913. #1:/Idaho-Bulletin 528/ujb00007 ID. Umpleby, J.B. 7 Eocene erosion surface southward from Copper King Mountain. Cut across granite, quartzite, slates and schists. Lemhi County, Idaho. 1910. Figure 4, a sketch, in U.S. Geological Survey. Bulletin 528. 1913. #1:/Idaho-Bulletin 528/ujb00008 ID. Umpleby, J.B. 8 Contact between Archean gneiss and Algonkian schist one-half mile northwest of Shoup. Separated by an erosion unconformity, which however, is not definitely shown. Lemhi County, Idaho. 1910. Plate 8-B in U.S. Geological Survey. Bulletin 528. 1913. #1:/Idaho-Bulletin 528/ujb00009 ID. Umpleby, J.B. 9 Eocene erosion surface northeastward from Gibbonsville, some the valleys are 4,000 feet deep. Lemhi County, Idaho. 1910. Figure 3, a sketch, in U.S. Geological Survey. Bulletin 528. 1913. #1:/Idaho-Bulletin 528/ujb00013 ID. Umpleby, J.B. 13 Eocene erosion surface southwestward from a point 3 miles west Gibbonsville. The rocks are closely folded schist and slates of Algonkian age. Lemhi County, Idaho. 1910. Figure 2, a sketch, in U.S. Geological Survey. Bulletin 528. 1913. #1:/Idaho-Bulletin 528/ujb00018 ID. Umpleby, J.B. 18 Cobalt-nickel lode, east end of Beliel group, Blackbird district; outcrop of lode. Lemhi County, Idaho. 1910. Plate 11-A in U.S. Geological Survey. Bulletin 528. 1913. #1:/Idaho-Bulletin 528/ujb00019 ID. Umpleby, J.B. 19 Cobalt-nickel lode, east end of Beliel group, Blackbird district; efflorescence of erythrite on surface of lode. Lemhi County, Idaho. 1910. Plate 11-B in U.S. Geological Survey. Bulletin 528. 1913. #1:/Idaho-Bulletin 528/ujb00028 ID. Umpleby, J.B. 28 Devonian beds along divide between Silver Moon Gulch and Long Canyon, Texas district. Lemhi County, Idaho. 1910. Plate 5-A in U.S. Geological Survey. Bulletin 528. 1913. #1:/Idaho-Bulletin 528/ujb00029 ID. Umpleby, J.B. 29 Terminal moraine at mouth of Meadow Lake canyon. Miocene lake beds in background and Beaverhead Mountains in the distance. Lemhi County, Idaho. 1910. Plate 5-B in U.S. Geological Survey. Bulletin 528. 1913. #1:/Idaho-Bulletin 528/ujb00030 ID. Umpleby, J.B. 30 Mining camp of Gilmore, from northeast. Lemhi County, Idaho. 1910. Plate 14 in U.S. Geological Survey. Bulletin 528. 1913. #1:/Colorado/cmr00436 ID. Campbell, M.R. 436 Looking down from foot of Berthoud Pass, probably near Empire, glaciated rocks in left; N.M. Tenneman and H.S. Gale on horses. Clear Creek County, Colorado. 1905. #1:/Colorado/cmr00437 ID. Campbell, M.R. 437 Berthoud Pass, looking west from foot of pass. Clear Creek County, Colorado. 1905. #1:/Colorado/cmr00438 ID. Campbell, M.R. 438 Cirque from Berthoud Pass road. Clear Creek County, Colorado. 1905. #1:/Colorado/cmr00442 ID. Campbell, M.R. 442 Mule drawn covered supply wagon, possibly at the summit of Berthoud Pass. Clear Creek County, Colorado. 1905. #1:/Colorado/cmr00443 ID. Campbell, M.R. 443 Field party in the saddle, summit of Berthoud Pass. Clear Creek County, Colorado. 1905. #1:/Alaska-Bulletin 535/caj00118 ID. Collier, A.J. 118 Massive deposit of silt at the Palisades of the Yukon, 25 miles below Tanana. Koyukuk district, Yukon region, Alaska. 1902. Plate 5-B in U.S. Geological Survey. Bulletin 535. 1913. #1:/Alaska-Bulletin 535/hfl00112 ID. Hess, F.L. 112 Typical exposures of Paleozoic limestones in the White Mountains. Preacher district, Yukon region, Alaska. 1904. Plate 10-A in U.S. Geological Survey. Bulletin 525. 1913 #1:/Alaska-Bulletin 535/hfl00159 ID. Hess, F.L. 159 Eocene beds on left bank of the Yukon 1.5 miles above Rampart. The beds in this locality are composed chiefly of fine sands and clayey shales. Koyukuk district, Yukon region, Alaska. 1904. Plate 6-A in U.S. Geological Survey. Bulletin 535. 1913. #1:/Alaska-Bulletin 538/mjb00005 ID. Mertie, J.B. 5 Bench in schist 4,000 feet above sea level. Yukon region, Alaska. 1911. Plate 5-A in U.S. Geological Survey. Bulletin 538. 1913. #1:/Alaska-Bulletin 538/mjb00016 ID. Mertie, J.B. 16 Gravel flat beneath ice, tributary of Charley River. Circle district, Yukon region, Alaska. 1911. Plate 7-B in U.S. Geological Survey. Bulletin 538. 1913. #1:/Alaska-Bulletin 538/mjb00026 ID. Mertie, J.B. 26 U-shaped valley, tributary of Charley River. Circle district, Yukon region, Alaska. 1911. Plate 10-B in U.S. Geological Survey. Bulletin 538. 1913. #1:/Alaska-Bulletin 538/mjb00029 ID. Mertie, J.B. 29 Moraine partly damming valley. Yukon region, Alaska. 1911. Plate 11-A in U.S. Geological Survey. Bulletin 538. 1913. #1:/Alaska-Bulletin 538/mjb00038 ID. Mertie, J.B. 38 Terminal slope of moraine from small valley. Yukon region, Alaska. 1911. Plate 11-B in U.S. Geological Survey. Bulletin 538. 1913. #1:/Alaska-Bulletin 538/mjb00050 ID. Mertie, J.B. 50 Cirque, head of Salcha River. Goodpaster district, Yukon region, Alaska. 1911. Plate 10- A in U.S. Geological Survey. Bulletin 538. 1913. #1:/Alaska-Bulletin 538/mjb00051 ID. Mertie, J.B. 51 Narrow valley, head of Chena River. Circle district, Yukon region, Alaska. 1911. Plate 4-B in U.S. Geological Survey. Bulletin 538. 1913. #1:/Alaska-Bulletin 538/mjb00061 ID. Mertie, J.B. 61 Contorted feldspathic quartzite, Salcha River. Goodpaster district, Yukon region, Alaska. 1911. Plate 9-A in U.S. Geological Survey. Bulletin 538. 1913. #1:/Alaska-Bulletin 538/mjb00067 ID. Mertie, J.B. 67 Contorted calcareous shales, Independence Creek, Tolovana district, Yukon region, Alaska. 1911. Plate 9-B in U.S. Geological Survey. Bulletin 538. 1913. #1:/Wyoming/sar00261 ID. Schultz, A.R. 261 C.L. Nelson and topographic party with equipment, Long Canyon, 15 miles north of Rock Springs, T. 21 N., R. 104. Sweetwater County, Wyoming. C. 1907. #1:/Alaska-Bulletin 536/sps00500 ID. Smith, P.S. 500 Moraine near outlet of Lake Selby, Kobuk River. Kobuk district, Northern Alaska region, Alaska. 1910. Plate 13-A in U.S. Geological Survey. Bulletin 536. 1913. #1:/Alaska-Bulletin 536/sps00502 ID. Smith, P.S. 502 The Kobuk valley in the vicinity of Lake Selby. Kobuk district, Northern Alaska region, Alaska. 1910. Plate 3 in U.S. Geological Survey. Bulletin 536. 1913. #1:/Alaska-Bulletin 536/sps00503 ID. Smith, P.S. 503 The Kobuk valley in the vicinity of Lake Selby. Kobuk district, Northern Alaska region, Alaska. 1910. Plate 3 in U.S. Geological Survey. Bulletin 536. 1913. #1:/Alaska-Bulletin 536/sps00530 ID. Smith, P.S. 530 Specimens of schistose conglomerate from Dahl Creek, Kobuk River. Kobuk district, Northern Alaska region, Alaska. 1910. Plate 8-B in U.S. Geological Survey. Bulletin 536. 1913. #1:/Alaska-Bulletin 536/sps00552 ID. Smith, P.S. 552 Typical outcrop of schist, Alatna River. Noatak district, Northern Alaska region, Alaska. 1910. Plate 8-A in U.S. Geological Survey. Bulletin 536. 1913. Plate 14-A in U.S. Geological Survey. Bulletin 815. 1930. #1:/Alaska-Bulletin 536/sps00555 ID. Smith, P.S. 555 Topography of limestone area in central part of Alatna River valley. Noatak district, Northern Alaska region, Alaska. 1910. Plate 9-A in U.S. Geological Survey. Bulletin 536. 1913. #1:/Alaska-Bulletin 536/sps00567 ID. Smith, P.S. 567 Glacier and glacial deposits, Alatna River. Noatak district, Northern Alaska region, Alaska. 1910. Plate 12-A in U.S. Geological Survey. Bulletin 536. 1913. #1:/Alaska-Bulletin 536/sps00570 ID. Smith, P.S. 570 Peaks and glaciers in central part of Alatna River basin. Noatak district, Northern Alaska region, Alaska. 1910. Photos sps00570 and sps00571 form a panorama. Plate 7-B in U.S. Geological Survey. Bulletin 536. 1913. Plate 4-B in U.S. Geological Survey. Bulletin 815. 1930. #1:/Alaska-Bulletin 536/sps00571 ID. Smith, P.S. 571 Peaks and glaciers in central part of Alatna River basin Noatak district, Northern Alaska region, Alaska. 1910. Photos sps00570 and sps00571 form a panorama. Plate 7-B in U.S. Geological Survey. Bulletin 536. 1913. Plate 4-B in U.S. Geological Survey. Bulletin 815. 1930. #1:/Alaska-Bulletin 536/sps00583 ID. Smith, P.S. 583 Upper part of Alatna River valley. Noatak district, Northern Alaska region, Alaska. 1910. Plate 7-A in U.S. Geological Survey. Bulletin 536. 1913. #1:/Alaska-Bulletin 536/sps00584 ID. Smith, P.S. 584 Upper part of Alatna River valley. Noatak district, Northern Alaska region, Alaska. 1910. Plate 7-A in U.S. Geological Survey. Bulletin 536. 1913. #1:/Alaska-Bulletin 536/sps00599 ID. Smith, P.S. 599 Deformed Paleozoic rocks, Noatak River. Noatak district, Northern Alaska region, Alaska. 1910. Plate 10-B in U.S. Geological Survey. Bulletin 536. 1913. #1:/Alaska-Bulletin 536/sps00606 ID. Smith, P.S. 606 Noatak and Ipmiluik valleys. Noatak district, Northern Alaska region, Alaska. 1910. Plate 6-B in U.S. Geological Survey. Bulletin 536. 1913. #1:/Alaska-Bulletin 536/sps00607 ID. Smith, P.S. 607 Noatak and Ipmiluik valleys. Noatak district, Northern Alaska region, Alaska. 1910. Plate 6-B in U.S. Geological Survey. Bulletin 536. 1913. #1:/Alaska-Bulletin 536/sps00610 ID. Smith, P.S. 610 Lakes on outwash plain, upper Noatak River. Noatak district, Northern Alaska region, Alaska. 1910. Plate 13-B in U.S. Geological Survey. Bulletin 536. 1913. #1:/Alaska-Bulletin 536/sps00611 ID. Smith, P.S. 611 Double structure in limestones, Noatak River. Noatak district, Northern Alaska region, Alaska. 1910. Plate 14-A in U.S. Geological Survey. Bulletin 536. 1913. Plate 17-B in U.S. Geological Survey. Bulletin 815. 1930. #1:/Alaska-Bulletin 536/sps00629 ID. Smith, P.S. 629 Exposure of limestone on upper Noatak River. Noatak district, Northern Alaska region, Alaska. 1910. Plate 9-B in U.S. Geological Survey. Bulletin 536. 1913. #1:/Alaska-Bulletin 536/sps00644 ID. Smith, P.S. 644 Aniuk lowland from camp of August 7, 1910. Noatak district, Northern Alaska region, Alaska. 1910. Plate 6-A in U.S. Geological Survey. Bulletin 536. 1913. #1:/Alaska-Bulletin 536/sps00645 ID. Smith, P.S. 645 Aniuk lowland from camp of August 7, 1910. Noatak district, Northern Alaska region, Alaska. 1910. Plate 6-A in U.S. Geological Survey. Bulletin 536. 1913. #1:/Alaska-Bulletin 536/sps00659 ID. Smith, P.S. 659 Double structure in sandstone, Noatak River. Noatak district, Northern Alaska region, Alaska. 1910. Plate 14-B in U.S. Geological Survey. Bulletin 536. 1913. Plate 19-B in U.S. Geological Survey. 815. 1930. #1:/Alaska-Bulletin 536/sps00660 ID. Smith, P.S. 660 Folded sandstone cut by gash vines, Noatak River. Noatak district, Northern Alaska region, Alaska. 1910. Plate 10-A in U.S. Geological Survey. Bulletin 536. 1913. #1:/Alaska-Bulletin 536/sps00673 ID. Smith, P.S. 673 Topography in the vicinity of the canyon of the Noatak. Noatak district, Northern Alaska region, Alaska. 1910. Plate 5-B in U.S. Geological Survey. Bulletin 536. 1913. Plate 5- A in U.S. Geological Survey. 815. 1930. #1:/Alaska-Bulletin 536/sps00674 ID. Smith, P.S. 674 Topography in the vicinity of the canyon of the Noatak. Noatak district, Northern Alaska region, Alaska. 1910. Plate 5-B in U.S. Geological Survey. Bulletin 536. 1913. Plate 5- A in U.S. Geological Survey. 815. 1930. #1:/Alaska-Bulletin 536/sps00682 ID. Smith, P.S. 682 Paleozoic rocks intruded by gabbro, canyon of the Noatak. Noatak district, Northern Alaska region, Alaska. 1910. Plate 11-B in U.S. Geological Survey. Bulletin 536. 1913. Plate 28-A in U.S. Geological Survey. 815. 1930. #1:/Alaska-Bulletin 536/sps00684 ID. Smith, P.S. 684 Folded Paleozoic rocks in canyon of the Noatak. Noatak district, Northern Alaska region, Alaska. 1910. Plate 11-A in U.S. Geological Survey. Bulletin 536. 1913. Plate 19-A in U.S. Geological Survey. 815. 1930. #1:/Alaska-Bulletin 536/sps00699 ID. Smith, P.S. 699 Ice cliffs in banks of the Noatak. Noatak district, Northern Alaska region, Alaska. 1910. Plate 12-B in U.S. Geological Survey. Bulletin 536. 1913. Plate 26-A in U.S. Geological Survey. 815. 1930. #1:/Alaska-Bulletin 536/sps00774 ID. Smith, P.S. 774 Hills west of Nimiuktuk River. Noatak district, Northern Alaska region, Alaska. 1910. Plate 5-A in U.S. Geological Survey. Bulletin 536. 1913. #1:/Alaska-Bulletin 536/sps00776 ID. Smith, P.S. 776 Hills west of Nimiuktuk River. Noatak district, Northern Alaska region, Alaska. 1910. Plate 5-A in U.S. Geological Survey. Bulletin 536. 1913. #1:/Alaska-Bulletin 536/sps00784 ID. Smith, P.S. 784 Northern part of Mission lowland. Northern Alaska region, Alaska. 1910. Plate 4-B in U.S. Geological Survey. Bulletin 536. 1913. #1:/Alaska-Bulletin 536/sps00785 ID. Smith, P.S. 785 Northern part of Mission lowland. Northern Alaska region, Alaska. 1910. Plate 4-B in U.S. Geological Survey. Bulletin 536. 1913. #1:/Alaska-Bulletin 536/sps00796 ID. Smith, P.S. 796 The Igichuk Hills, Noatak Valley. Noatak district, Northern Alaska region, Alaska. 1910. Plate 4-A in U.S. Geological Survey. Bulletin 536. 1913. #1:/Alaska-Bulletin 536/sps00797 ID. Smith, P.S. 797 The Igichuk Hills, Noatak Valley. Noatak district, Northern Alaska region, Alaska. 1910. Plate 4-A in U.S. Geological Survey. Bulletin 536. 1913. #1:/South Dakota-Bulletin 575/bal00009 ID. Beekly, A.L. 9 Butte capped by Fox Hills sandstone in E. « Sec. 27, T. 21 N., R. 23 E. Corson County, South Dakota. 1909. Plate 4-B in U.S. Geological Survey. Bulletin 575. 1914. #1:/South Dakota-Bulletin 575/bal00012 ID. Beekly, A.L. 12 Triceratops bones found near base of Lance formation in SE ¬ Sec. 20, T. 21 N., R. 23 E.; Leg bone and vertebra, length of large bone 18 inches. Corson County, South Dakota. 1909. Plate 7-A in U.S. Geological Survey. Bulletin 575. 1914. #1:/South Dakota-Bulletin 575/bal00013 ID. Beekly, A.L. 13 Triceratops bones found near base of Lance formation in SE ¬ Sec. 20, T. 21 N., R. 23 E.; leg bones, length of long bone 26 inches. Corson County, South Dakota. 1909. Plate 7-B in U.S. Geological Survey. Bulletin 575. 1914. #1:/Washington-Bulletin 550/banh0074 ID. Bancroft, H. 74 Part of United Copper camp, ore bin of Copper King in the background. Stevens County, Washington. C. 1909. Plate 5-B in U.S. Geological Survey. Bulletin 550. 1914. #1:/Washington-Bulletin 550/banh0077 ID. Bancroft, H. 77 Miner at work in United Copper Mine. Shows quartz vein included between walls of shale, the shale on each side showing some mineralization by tetrahedrite, in which the vein itself is rich. Stevens County, Washington. C. 1909. Plate 7-A in U.S. Geological Survey. Bulletin 550. 1914. #1:/Washington-Bulletin 550/banh0084 ID. Bancroft, H. 84 Section of vein from Anaconda No. 1 property, shows parallel banding in the replaced limestone by galena, sphalerite, and tetrahedrite. Stevens County, Washington. C. 1909. Plate 1-B in U.S. Geological Survey. Bulletin 550. 1914. #1:/Washington-Bulletin 550/banh0085 ID. Bancroft, H. 85 Minor folding in limestone country rock at Copper King property, Northport district. Stevens County, Washington. C. 1909. Plate 2-A in U.S. Geological Survey. Bulletin 550. 1914. #1:/Washington-Bulletin 550/banh0086 ID. Bancroft, H. 86 Section of vein from Standard mine, shows mineralized black shales, the dark streaks in general representing galena and tetrahedrite and light spots quartz. Stevens County, Washington. C. 1909. Plate 2-B in U.S. Geological Survey. Bulletin 550. 1914. #1:/Washington-Bulletin 550/banh0088 ID. Bancroft, H. 88 Glaciated surface of shale containing many quartz lenses, northeast Washington. C. 1909. Plate 1-A in U.S. Geological Survey. Bulletin 550. 1914. #1:/Washington-Bulletin 550/banh0094 ID. Bancroft, H. 94 Lens of limestone included in shale, Globe property. Ferry County, Washington. C. 1909. Plate 3-A in U.S. Geological Survey. Bulletin 550. 1914. #1:/Washington-Bulletin 550/banh0098 ID. Bancroft, H. 98 Mass of quartzite surrounded by intrusive porphyry, Second Thought group. Ferry County, Washington. C. 1909. Plate 3-B in U.S. Geological Survey. Bulletin 550. 1914. #1:/Washington-Bulletin 550/banh0099 ID. Bancroft, H. 99 First Thought mine, showing 65 stope and steep bluff in which upper workings are situated. Ferry County, Washington. C. 1909. Plate 5-A in U.S. Geological Survey. Bulletin 550. 1914. #1:/Washington-Bulletin 550/banh0107 ID. Bancroft, H. 107 Republic mill. Ferry County, Washington. C. 1909. Plate 16 in U.S. Geological Survey. Bulletin 550. 1914. #1:/Washington-Bulletin 550/banh0111 ID. Bancroft, H. 111 Southern Republic vein, shows banding in the quartz vein and included stringers of country rock. Ferry County, Washington. C. 1909. Plate 14-B in U.S. Geological Survey. Bulletin 550. 1914. #1:/Washington-Bulletin 550/banh0112 ID. Bancroft, H. 112 Glory hole of New Republic mine, view taken in stope on top of Republic knoll. Ferry County, Washington. C. 1909. Plate 14-A in U.S. Geological Survey. Bulletin 550. 1914. #1:/Washington-Bulletin 550/banh0125 ID. Bancroft, H. 125 Stope in upper level, Surprise mine. Ferry County, Washington. C. 1909. Plate 19-B in U.S. Geological Survey. Bulletin 550. 1914. #1:/Washington-Bulletin 550/banh0129 ID. Bancroft, H. 129 Panorama of Republic, Ferry County, Washington. C. 1909. Plate 11 in U.S. Geological Survey. Bulletin 550. 1914. #1:/Washington-Bulletin 550/banh0130 ID. Bancroft, H. 130 Panorama of Republic, Ferry County, Washington. C. 1909. Plate 11 in U.S. Geological Survey. Bulletin 550. 1914. #1:/Washington-Bulletin 550/banh0134 ID. Bancroft, H. 134 Faulted vein no. 2, Germania mine; a true fissure vein in granite, shows some mineralization by wolframite. Stevens County, Washington. C. 1909. Plate 7-B in U.S. Geological Survey. Bulletin 550. 1914. #1:/South Dakota-Bulletin 575/cwr00100 ID. Calvert, C.W. 100 Conical flat-topped buttes capped by Fox Hills sandstone, on divide between Grand and Moreau Rivers. Ziebach County, South Dakota. 1909. Plate 4-A in U.S. Geological Survey. Bulletin 575. 1914. #1:/South Dakota-Bulletin 575/cwr00102 ID. Calvert, C.W. 102 Badlands in Lance formation 2 miles northwest of Black Horse butte, T. 20 N, R. 18 E. Corson County, South Dakota. 1909. Plate 3-B in U.S. Geological Survey. Bulletin 575. 1914. #1:/South Dakota-Bulletin 575/cwr00104 ID. Calvert, C.W. 104 Characteristic barren hillside of Pierre Shale, on north side of Moreau River, below Whitehorse. Dewey County, South Dakota. 1909. Plate 5-A in U.S. Geological Survey. Bulletin 575. 1914. #1:/South Dakota-Bulletin 575/cwr0110a ID. Calvert, C.W. 110a Grand River valley, looking upstream from bluff of Fox Hills sandstone in NW ¬ Sec. 11, T. 20 N., R. 22 E. Corson County, South Dakota. 1909. Plate 6 in U.S. Geological Survey. Bulletin 575. 1914. #1:/South Dakota-Bulletin 575/cwr0110b ID. Calvert, C.W. 110b Grand River valley, looking upstream from bluff of Fox Hills sandstone in NW ¬ Sec. 11, T. 20 N., R. 22 E. Corson County, South Dakota. 1909. Plate 6 in U.S. Geological Survey. Bulletin 575. 1914. #1:/Oregon-Bulletin 546/djs00410 ID. Diller, J.S. 410 Even crest of Iron Mountain, Curry County, Oregon. C. 1905. Plate 2 in U.S. Geological Survey. Bulletin 546. 1914. #1:/Arizona-Bulletin 549/nlf00137 ID. Noble, L.F. 137 Grand Canyon National Park, Arizona. Eastward from the summit of Mount Huethawalii, showing Fossil Mountain and Havasupi Point. The cirque in the foreground is the head of Bass Canyon, down which Bass trail descends to Colorado River. The peak-like promontory in the center of the view is Fossil Mountain, which gradually being isolated from the Coconino Plateau by erosion and will in time become a butte or outlier like Mount Huethawalii. The same fate, though it is more remote, awaits Havasupai Point, the high promontory at left of Fossil Mountain. Coconino County, Arizona. 1908. Plate 7-B in U.S. Geological Survey. Bulletin 549. 1914. #1:/Arizona-Bulletin 549/nlf00138 ID. Noble, L.F. 138 Grand Canyon National Park, Arizona. Faults in Unkar wedge in canyon of Shinumo Creek. The wedge outlined includes 1,000 vertical feet of strata; diabase, Hakatai shale and Shinumo quartzite are shown. Coconino County, Arizona. 1908. Plate 15-B in U.S. Geological Survey. Bulletin 549. 1914. #1:/Wyoming-Bulletin 543/sar00012 ID. Schultz, A.R. 12 Thick growth of pine, fir and balsam in T. 28 N., R. 116 W.; sheep grazing among timber and in open parks. Lincoln County, Wyoming. 1906. Plate 2-A in U.S. Geological Survey. Bulletin 543. 1914. #1:/Wyoming-Bulletin 543/sar00026 ID. Schultz, A.R. 26 Red conglomerate beds between Labarge Ridge and Meridian Ridge, T. 27 N., R. 114 W.; showing peculiar weathering. Lincoln County, Wyoming. 1906. Plate 5-B in U.S. Geological Survey. Bulletin 543. 1914. #1:/Wyoming-Bulletin 543/sar00031 ID. Schultz, A.R. 31 Mount Darby, mountain is composed of Carboniferous rocks and level stretch of Cretaceous rocks. Landers Basin, on south Pine Creek in foreground. Lincoln County, Wyoming. 1906. Plate 9-B in U.S. Geological Survey. Bulletin 543. 1914. #1:/Wyoming-Bulletin 543/sar00038 ID. Schultz, A.R. 38 Conglomerate resting on Jurassic rocks west of Lookout Peak, T. 35 N., R. 115 W., showing size of boulders and pebbles. Many of the pebbles are very angular; others are well rounded. Lincoln County, Wyoming. 1906. Plate 5-A in U.S. Geological Survey. Bulletin 543. 1914. #1:/Wyoming-Bulletin 543/sar00040 ID. Schultz, A.R. 40 Fault contact near south end of Mount McDougal, headwater of Sheep Creek, carboniferous rocks on left. Heavy ledges of sandstone on right. Overthrust nature of fault has been exposed by stream erosion. Lincoln County, Wyoming. 1906. Plate 7-A in U.S. Geological Survey. Bulletin 543. 1914. #1:/Wyoming-Bulletin 543/sar00046 ID. Schultz, A.R. 46 Fault contact east of Lander Mountain. Lincoln County, Wyoming. 1906. Plate 7-B, with diagram, in U.S. Geological Survey. Bulletin 543. 1914. #1:/Wyoming-Bulletin 543/sar00052 ID. Schultz, A.R. 52 North and west slopes of hills on Fall River, T. 38 N., R. 115 W., showing heavy growth of timber extending to very crest of hills. Lincoln County, Wyoming. 1906. Plate 2-B in U.S. Geological Survey. Bulletin 543. 1914. #1:/Wyoming-Bulletin 543/sar00058 ID. Schultz, A.R. 58 South slope of Gros Ventre Mountains, terrace bank of Granite Creek in the foreground, showing south limb of anticline and steeply southward-dipping beds. Lincoln County, Wyoming. 1906. Plate 6 in U.S. Geological Survey. Bulletin 543. 1914. #1:/Wyoming-Bulletin 543/sar00059 ID. Schultz, A.R. 59 Sharp fold in Jurassic rocks on Fall River near head of canyon, T. 38 N, R. 114 W., showing proximity of anticlinal and synclinal axes. Lincoln County, Wyoming. 1906. Plate 4-B in U.S. Geological Survey. Bulletin 543. 1914. #1:/Wyoming-Bulletin 543/sar00067 ID. Schultz, A.R. 67 Light colored conglomerate of the Almy formation in Jackson Hole north of Fall River and east of Snake River. Beds dipping 15-25 degrees NE and form ridge several miles long. Lincoln County, Wyoming. 1906. Plate 4-A in U.S. Geological Survey. Bulletin 543. 1914. #1:/Wyoming-Bulletin 543/sar00075 ID. Schultz, A.R. 75 Virginia Peak, on Greys River, showing heavy growth of timber in valleys and on slopes in Cretaceous rocks and lack of it on peaks and slopes in Carboniferous rocks. Lincoln County, Wyoming. 1906. Plate 9-A in U.S. Geological Survey. Bulletin 543. 1914. #1:/Idaho-Bulletin 539/ujb00033 ID. Umpleby, J.B. 33 Salmon canyon with Clayton in the foreground, looking north. Custer County, Idaho. 1911. Plate 2-A in U.S. Geological Survey. Bulletin 539. 1913. #1:/Idaho-Bulletin 539/ujb00035 ID. Umpleby, J.B. 35 Bay Horse canyon as from a point near its head. Bay Horse is beyond the second bend. Custer County, Idaho. 1911. Plate 2-B in U.S. Geological Survey. Bulletin 539. 1913. #1:/Idaho-Bulletin 539/ujb00042 ID. Umpleby, J.B. 42 South wall of Kinnikinnick canyon as seen from Poverty Flat. Custer County, Idaho. 1911. Plate 4-A in U.S. Geological Survey. Bulletin 539. 1913. #1:/Idaho-Bulletin 539/ujb00043 ID. Umpleby, J.B. 43 Spur on the north side of Poverty Flat. Showing the highly inclined beds across which the flat has been developed. The flat is 9,600 feet above sea level. Custer County, Idaho. 1911. Plate 3-A in U.S. Geological Survey. Bulletin 539. 1913. #1:/Idaho-Bulletin 539/ujb00050 ID. Umpleby, J.B. 50 Slaty cleavage in Paleozoic(?) shales at roadside 2 miles below Bay Horse canyon. Custer County, Idaho. 1911. Plate 5-B in U.S. Geological Survey. Bulletin 539. 1913. #1:/Idaho-Bulletin 539/ujb00051 ID. Umpleby, J.B. 51 Detail of structure near the Ramshorn and Skylark mines, showing slaty cleavage followed by the Ramshorn vein and bedding planes followed by the Skylark vein. Custer County, Idaho. 1911. Plate 6-B in U.S. Geological Survey. Bulletin 539. 1913. #1:/Idaho-Bulletin 539/ujb00053 ID. Umpleby, J.B. 53 Lost Packer smelter and ore piles as seen from the south. Custer County, Idaho. 1911. Plate 9 in U.S. Geological Survey. Bulletin 539. 1913. #1:/Idaho-Bulletin 539/ujb00056 ID. Umpleby, J.B. 56 Ramshorn and Skylark mines, Bay Horse district. The strike of the Ramshorn vein is shown by a series of dumps on the right. The Skylark dumps are shown at the left, in the upper part of the view. Custer County, Idaho. 1911. Plate 6-A in U.S. Geological Survey. Bulletin 539. 1913. #1:/Idaho-Bulletin 539/ujb00057 ID. Umpleby, J.B. 57 Miocene lake beds northeast of Poverty Flat, note scarcity of vegetation in areas of lake beds. Custer County, Idaho. 1911. Plate 4-B in U.S. Geological Survey. Bulletin 539. 1913. #1:/Virgina/bjs00049 ID. Burrows, J.S. 49 Office work in the field, pair of geologists reading or reviewing their notes, or books; notice the oil lamp and relaxed posture. Crab Orchard, Lee County, Virginia. 1903. #1:/Montana/bal00112 ID. Beekly, A.L. 112 Office scene: interior of office tent somewhere in Montana. 1910. #1:/Pennsylvania-Bulletin 586/dtn00269 ID. Dale, T.N. 269 Bangor Union quarry, looking northwestward, showing inner part of flat syncline, distances between the strike of the two about 500 feet. Northampton County, Pennsylvania. 1912. Plate 14 in U.S. Geological Survey. Bulletin 586. 1914. #1:/Pennsylvania-Bulletin 586/dtn00270 ID. Dale, T.N. 270 Black-banded grey slate from Phoenix quarry Windgap; smoothly ground slabs showing variation in width of ribbons. Camera case 12 inches squared. Northampton County, Pennsylvania. C. 1910. Plate 6-A in U.S. Geological Survey. Bulletin 586. 1914. #1:/Pennsylvania-Bulletin 586/dtn00273 ID. Dale, T.N. 273 Bedding and cleavage in Phoenix, quarry, Windgap. The more calcareous, "ribbon" beds, a little weathered at the top, curve steeply northward. Northampton County, Pennsylvania. C. 1910. Plate 5-B in U.S. Geological Survey. Bulletin 586. 1914. #1:/Vermont-Bulletin 586/dtn00275 ID. Dale, T.N. 275 Cedar Point quarry, on Lake Bomoseen, Castleton; north face showing mill-stock slate in cross fractures. The flat syncline has a slight southerly pitch and dips 15-20 degrees E., the board on the wall is 3.5 feet long. Rutland County, Vermont. C. 1910. Plate 19-A in U.S. Geological Survey. Bulletin 586. 1914. #1:/Arizona-Bulletin 582/hjm00010 ID. Hill, J.M. 10 Inclined bedding structure in rhyolite tuff, one mile northeast of Nogales, looking southwest. Santa Cruz County, Arizona. 1909. Plate 6-B in U.S. Geological Survey. Bulletin 582. 1915. #1:/Utah-Bulletin 581/wch0179a ID. Wegemann, C.H. 179a Valley of Weber River, from the east: Town of Coalville on right, left to right the following mines, Carleton, Sargeant, Buell & Bateman. Top to bottom the following geologic features; sandstone, Wasatch formation unconformable on Cretaceous beds, Cretaceous conglomerate. Summit County, Utah. 1911. Plate 6-A in U.S. Geological Survey. Bulletin 581. 1915. #1:/Utah-Bulletin 581/wch0179b ID. Wegemann, C.H. 179b Valley of Weber River, from the east: Town of Coalville on right, left to right the following mines, Carleton, Sargeant, Buell & Bateman. Top to bottom the following geologic features; sandstone, Wasatch formation unconformable on Cretaceous beds, Cretaceous conglomerate. Summit County, Utah. 1911. Plate 6-A in U.S. Geological Survey. Bulletin 581. 1915. #1:/Utah-Bulletin 581/wch0179c ID. Wegemann, C.H. 179c Valley of Chalk Creek, looking north from same viewpoint as Plate 6-A; Town of Coalville on left, (left to right starting above ridge at left); Location of Echo City, fault, a minor fault, outcrop of sandstone, Wasatch mine, outcrop of sandstone. Summit County, Utah. 1911. Plate 6-B in U.S. Geological Survey. Bulletin 581. 1915. #1:/Utah-Bulletin 581/wch0179d ID. Wegemann, C.H. 179d Valley of Chalk Creek, looking north from same viewpoint as Plate 6-A; Town of Coalville on left, (left to right starting above ridge at left); Location of Echo City, fault, a minor fault, outcrop of sandstone, Wasatch mine, outcrop of sandstone. Summit County, Utah. 1911. Plate 6-B in U.S. Geological Survey. Bulletin 581. 1915. #1:/Utah-Bulletin 581/wch00183 ID. Wegemann, C.H. 183 Looking west across Echo Canyon, cliffs of conglomerate of Wasatch formation, the strata of the which dip northwest in a syncline, which adjoins the Coalville formation. Summit County, Utah. 1911. Plate 7-B in U.S. Geological Survey. Bulletin 581. 1915. #1:/Utah-Bulletin 581/wch00188 ID. Wegemann, C.H. 188 Looking northeast in Sec. 28, T. 3 N., R. 6 E. Sandstone in vertical position, abrupt turn of "Wasatch" coal bed at northeast end of anticline. Summit County, Utah. 1911. Plate 7-A in U.S. Geological Survey. Bulletin 581. 1915. #1:/Utah-Bulletin 581/wch00193 ID. Wegemann, C.H. 193 Hoffman mine, Sec. 5, T. 2 N., R. 6 E., "Wasatch" coal bed, 10 feet thick dips 78 degrees W. on limb of overturned anticline. Sandstone floor on left, shale roof on right. Summit County, Utah. 1911. Plate 10-B in U.S. Geological Survey. Bulletin 581. 1915. #1:/Utah-Bulletin 581/wch00194 ID. Wegemann, C.H. 194 Looking north across creek from hill in Sec. 18, T. 2 N., R. 6 E., See published photo, outlining crest of anticline and other features. Valley of Chalk Creek. Summit County, Utah. 1911. Plate 8-A in U.S. Geological Survey. Bulletin 581. 1915. #1:/Utah-Bulletin 581/wch0194a ID. Wegemann, C.H. 194a Looking north across creek from hill in Sec. 18, T. 2 N., R. 6 E., See published photo, outlining crest of anticline and other features. Valley of Chalk Creek. Summit County, Utah. 1911. Plate 8-A in U.S. Geological Survey. Bulletin 581. 1915. #1:/Utah-Bulletin 581/wch00196 ID. Wegemann, C.H. 196 Composed as one photograph. Looking northwest from the Narrows, Coalville at left, Wasatch formation identified on horizon at right, and center of panorama, filling a pre- Wasatch stream valley and bounded on either side by lighter colored strata of Colorado age. Valley of Chalk Creek. Summit County, Utah. 1911. Plate 8-B in U.S. Geological Survey. Bulletin 581. 1915. #1:/Utah-Bulletin 581/wch00200 ID. Wegemann, C.H. 200 Near Boyer mine, Sec. 36, T. 3 N., R. 6 E., looking northeast, sandstone overlying coal bed. Summit County, Utah. 1911. Plate 10-A in U.S. Geological Survey. Bulletin 581. 1915. #1:/Utah-Bulletin 581/wch00201 ID. Wegemann, C.H. 201 Composed as one photograph. Looking north up Huff Creek in sec. 13, T. 3 N., R. 6 E; sandstone on right. Summit County, Utah. 1911. Plate 9-B in U.S. Geological Survey. Bulletin 581. 1915. #1:/Utah-Bulletin 581/wch00204 ID. Wegemann, C.H. 204 Composed as one photograph. Looking west down Springs Canyon, prospects on coal bed in foreground on right, Weber Valley and escarpment of sandstone in middle distance. Summit County, Utah. 1911. Plate 9-A in U.S. Geological Survey. Bulletin 581. 1915. #1:/Colorado-Bulletin 596/bal00149 ID. Beekly, A.L. 149 Weathered granite. Jackson County, Colorado. 1911. Plate 5-A in U.S. Geological Survey. Bulletin 596. 1915. #1:/Colorado-Bulletin 596/bal00150 ID. Beekly, A.L. 150 Erosion forms in granite. Jackson County, Colorado. 1911. Plate 5-B in U.S. Geological Survey. Bulletin 596. 1915. #1:/Colorado-Bulletin 596/bal00163 ID. Beekly, A.L. 163 Banded gneiss near to of Zirkel Mountain. Jackson County, Colorado. 1911. Plate 3-B in U.S. Geological Survey. Bulletin 596. 1915. #1:/Colorado-Bulletin 596/bal00168 ID. Beekly, A.L. 168 Crest of Zirkel Mountain. Jackson County, Colorado. 1911. Plate 1-B in U.S. Geological Survey. Bulletin 596. 1915. #1:/Colorado-Bulletin 596/bal00177 ID. Beekly, A.L. 177 Delanos Butte. Jackson County, Colorado. 1911. Plate 8 in U.S. Geological Survey. Bulletin 596. 1915. #1:/Colorado-Bulletin 596/bal00181 ID. Beekly, A.L. 181 Mouth of Red Canyon. Jackson County, Colorado. 1911. Plate 4 in U.S. Geological Survey. Bulletin 596. 1915. #1:/Colorado-Bulletin 596/bal00191 ID. Beekly, A.L. 191 Upper 30 feet of Riach coal bed. Coalmont. Jackson County, Colorado. 1911. Plate 11-B in U.S. Geological Survey. Bulletin 596. 1915. #1:/Colorado-Bulletin 596/bal00218 ID. Beekly, A.L. 218 Volcanic breccia. Jackson County, Colorado. 1911. Plate 6-B in U.S. Geological Survey. Bulletin 596. 1915. #1:/Colorado-Bulletin 596/bal00221 ID. Beekly, A.L. 221 Columnar basalt capping Spicer Peak. Jackson County, Colorado. 1911. Plate 6-A in U.S. Geological Survey. Bulletin 596. 1915. #1:/Colorado-Bulletin 596/bal00223 ID. Beekly, A.L. 223 Eroded sandstone of Coalmont formation. Jackson County, Colorado. 1911. Plate 1-A in U.S. Geological Survey. Bulletin 596. 1915. #1:/Colorado-Bulletin 596/bal00232 ID. Beekly, A.L. 232 Porphyry dike. Jackson County, Colorado. 1911. Plate 7 in U.S. Geological Survey. Bulletin 596. 1915. #1:/Colorado-Bulletin 596/bal00252 ID. Beekly, A.L. 252 Floor and rim in southeast part of North Park. Jackson County, Colorado. 1911. Plate 2 in U.S. Geological Survey. Bulletin 596. 1915. #1:/Colorado-Bulletin 596/bal00253 ID. Beekly, A.L. 253 Floor and rim in southeast part of North Park. Jackson County, Colorado. 1911. Plate 2 in U.S. Geological Survey. Bulletin 596. 1915. #1:/Colorado-Bulletin 596/bal00260 ID. Beekly, A.L. 260 Marr coal bank. Jackson County, Colorado. 1911. Plate 9-B in U.S. Geological Survey. Bulletin 596. 1915. #1:/Colorado-Bulletin 596/bal00261 ID. Beekly, A.L. 261 Dune sand. North Park. Jackson County, Colorado. 1911. Plate 3-A in U.S. Geological Survey. Bulletin 596. 1915. #1:/Colorado-Bulletin 596/bal00265 ID. Beekly, A.L. 265 V-shaped fold in Dakota sandstone. Jackson County, Colorado. 1911. Plate 9-A in U.S. Geological Survey. Bulletin 596. 1915. #1:/Virgina-Bulletin 583/hfl00854 ID. Hess, F.L. 854 Section of wolframite from Irish Creek, showing interstitial scheelite. X 30. Virginia. C. 1910. Plate 14 in U.S. Geological Survey. Bulletin 583. 1914. #1:/Colorado-Bulletin 583/hfl01291 ID. Hess, F.L. 1291 Crystallized ferberite with elongated rhombic crystal faces, from the Nugget mine; coated with ammonium chloride. Natural size. Gilpin County, Colorado. 1910. Plate 10-B in U.S. Geological Survey. Bulletin 583. 1914. #1:/Colorado-Bulletin 583/hfl01292 ID. Hess, F.L. 1292 Crystallized ferberite from the "Crow Patent." Nederland. The crystals are attached by the c axis and show penetration twins and reentrant angles. Coated with ammonium chloride. Natural size. Boulder County, Colorado. 1910. Plate 8-A in U.S. Geological Survey. Bulletin 583. 1914. #1:/Colorado-Bulletin 583/hfl01293 ID. Hess, F.L. 1293 Crystallized ferberite from the Georgia A. Mine, Nederland; coated with ammonium chloride. X 10. Boulder County, Colorado. 1910. Plate 8-B in U.S. Geological Survey. Bulletin 583. 1914. #1:/Colorado-Bulletin 583/hfl01294 ID. Hess, F.L. 1294 Wedge shaped ferberite crystals from the Hoosier Mine, Nederland. Fan-shaped intergrowth and twins in lower right center; coated with ammonium chloride. X 2. Boulder County, Colorado. 1910. Plate 7-B in U.S. Geological Survey. Bulletin 583. 1914. #1:/California-Bulletin 594/hjm00028 ID. Hill, J.M. 28 Town of Hayden, looking northwesterly, from Golden Eagle dump, sky line shows even surface of the basalt-covered plains. Lassen County, California 1912. Plate 2 in U.S. Geological Survey. Bulletin 594. 1915. #1:/Nevada-Bulletin 594/hjm00045 ID. Hill, J.M. 45 Lander Hill, Reese River mining district, Austin, looking north-northeast from Marshall basin road at summit of divide south Austin. Lander County, Nevada. 1912. Plate 12 in U.S. Geological Survey. Bulletin 594. 1915. #1:/Nevada-Bulletin 594/hjm00046 ID. Hill, J.M. 46 Lander Hill, Reese River mining district, Austin, looking north-northeast from Marshall basin road at summit of divide south Austin. Lander County, Nevada. 1912. Plate 12 in U.S. Geological Survey. Bulletin 594. 1915. #1:/Nevada-Bulletin 594/hjm00052 ID. Hill, J.M. 52 Last Chance hill, Aurora, shows gentle slopes of andesitic flows; Johnson and Chihuahua stopes (caved) on ridge at left, Real Del Monte shaft, top of hill in center, Granite Mountain on right. Mineral County, Nevada. 1912. Plate 15 in U.S. Geological Survey. Bulletin 594. 1915. #1:/Nevada-Bulletin 594/hjm00053 ID. Hill, J.M. 53 Last Chance hill, Aurora, shows gentle slopes of andesitic flows; Johnson and Chihuahua stopes (caved) on ridge at left, Real Del Monte shaft, top of hill in center, Granite Mountain on right. Mineral County, Nevada. 1912. Plate 15 in U.S. Geological Survey. Bulletin 594. 1915. #1:/Nevada-Bulletin 594/hjm00055 ID. Hill, J.M. 55 South end of Silver Hill, Aurora, shows croppings of Old Esmeralda vein and cliffs where andesitic flows are silicified at the junction of several veins. Mineral County, Nevada. 1912. Plate 16-A in U.S. Geological Survey. Bulletin 594. 1915. #1:/Nevada-Bulletin 594/hjm00057 ID. Hill, J.M. 57 Chihuahua stope on Last Chance hill, branching veins in footwall of main vein at left and stratified volcanic material in right center. Mineral County, Nevada. 1912. Plate 16-B in U.S. Geological Survey. Bulletin 594. 1915. #1:/California-Bulletin 594/hjm00064 ID. Hill, J.M. 64 Panorama of Warner Mountains, near High Grade, looking south-southeast, shows level summit line and principal peaks. Modoc County, California. 1912. Plate 4 in U.S. Geological Survey. Bulletin 594. 1915. #1:/California-Bulletin 594/hjm00065 ID. Hill, J.M. 65 Panorama of Warner Mountains, near High Grade, looking south-southeast, shows level summit line and principal peaks. Modoc County, California. 1912. Plate 4 in U.S. Geological Survey. Bulletin 594. 1915. #1:/California-Bulletin 594/hjm00066 ID. Hill, J.M. 66 Panorama of Warner Mountains, near High Grade, looking south-southeast, shows level summit line and principal peaks. Modoc County, California. 1912. Plate 4 in U.S. Geological Survey. Bulletin 594. 1915. #1:/California-Bulletin 594/hjm00067 ID. Hill, J.M. 67 Croppings of the Oregon (Kafader) vein ,looking northwesterly. Modoc County, California. 1912. Plate 6-B in U.S. Geological Survey. Bulletin 594. 1915. #1:/California-Bulletin 594/hjm00068 ID. Hill, J.M. 68 Sunshine tunnel looking southwest, shows typical "rock piles" of High Grade Hill. Modoc County, California. 1912. Plate 6-A in U.S. Geological Survey. Bulletin 594. 1915. #1:/Alaska-Bulletin 587/jbl00269 ID. Johnson, B.L. 269 Fissure vein in No. 1 tunnel, Barnes property, Crow Creek. Hope district, Cook Inlet region, Alaska. July 1911. Plate 31-B in U.S. Geological Survey. Bulletin 587. 1915. #1:/Alaska-Bulletin 587/jbl00272 ID. Johnson, B.L. 272 Quartz diorite intrusives in slaty rocks near headwaters of Crow Creek shows form of quartz diorite bosses and the dikes branching off from the main mass. Hope district, Cook Inlet region, Alaska. August 1911. Plate 25 in U.S. Geological Survey. Bulletin 587. 1915. #1:/Alaska-Bulletin 587/jbl00295 ID. Johnson, B.L. 295 Gravel flat at lower end of Lynx Creek. Hope district, Cook Inlet region, Alaska. August 11, 1911. Plate 38-A in U.S. Geological Survey. Bulletin 587. 1915. #1:/Alaska-Bulletin 587/jbl00314 ID. Johnson, B.L. 314 Mineralized diorite porphyry dike, Fresno Creek. Open cut on the Moose Pass dike; note sheared walls, slight variation in width, and fracturing. Tustumena district, Cook Inlet region, Alaska. 1911. Plate 30-A in U.S. Geological Survey. Bulletin 587. 1915. #1:/Alaska-Bulletin 587/jbl00350 ID. Johnson, B.L. 350 Wheel run by hydraulic giant for hoisting boulders with a derrick, Lynx Creek. Hope district, Cook Inlet region, Alaska. September 17, 1911. Plate 36-B in U.S. Geological Survey. Bulletin 587. 1915. #1:/Alaska-Bulletin 587/jbl00351 ID. Johnson, B.L. 351 Forked tailrace for spreading tailings over the Bench Creek flats at Lynx Creek, shows method of disposing of the gravel after it is brought through the tunnel from the locality shown in photograph 295, and also the character of the valley bottom and timber. Hope district, Cook Inlet region, Alaska. September 17, 1911. Plate 38-B in U.S. Geological Survey. Bulletin 587. 1915. #1:/Alaska-Bulletin 587/jbl00359 ID. Johnson, B.L. 359 Old gravel filled channel of Gulch Creek. Hope district, Cook Inlet region, Alaska. September 17, 1911. Plate 26-B in U.S. Geological Survey. Bulletin 587. 1915. #1:/Alaska-Bulletin 587/jbl00360 ID. Johnson, B.L. 360 Gold bearing quartz vein on property of Seward Bonanza Gold Mines Co., near mile 20, Alaska Northern Railway. Tustumena district, Cook Inlet region, Alaska. September 11, 1911. Plate 32-A in U.S. Geological Survey. Bulletin 587. 1915. #1:/Alaska-Bulletin 587/jbl00361 ID. Johnson, B.L. 361 Nearer view of Gold bearing quartz vein on property of Seward Bonanza Gold Mines Co., near mile 20, Alaska Northern Railway. Tustumena district, Cook Inlet region, Alaska. September 11, 1911. Plate 32-B in U.S. Geological Survey. Bulletin 587. 1915. #1:/Alaska-Bulletin 587/jbl00376 ID. Johnson, B.L. 376 Gold bearing quartz lode on Kennedy-Pullen-Davis property, Lost Creek, shows reticulating quartz veins cementing shattered graywacke bed along fault planes. Hope district, Cook Inlet region, Alaska. October 17, 1911. Plate 31-A in U.S. Geological Survey. Bulletin 587. 1915. #1:/Alaska-Bulletin 587/jbl00394 ID. Johnson, B.L. 394 Quartz vein parallel to joint planes in graywacke, shows parallel master joints, between two of which (at the left side of the opening) is a thin quartz vein. Northern Light group near Seward. Seward district, Alaska Gulf region, Alaska. October 19, 1911. Plate 30-B in U.S. Geological Survey. Bulletin 587. 1915. #1:/Alaska-Bulletin 578/mag00078 ID. Maddren, A.G. 78 Horse scow on Innoko River. Kaiyuh district, Yukon region, Alaska. 1913. Plate 5-B in U.S. Geological Survey. Bulletin 578. 1914 #1:/Alaska-Bulletin 578/mag00086 ID. Maddren, A.G. 86 Typical open-cut mine, Flat Creek. Iditarod district, Yukon region, Alaska. 1913. Plate 6-B in U.S. Geological Survey. Bulletin 578. 1914 #1:/Alaska-Bulletin 578/mag00090 ID. Maddren, A.G. 90 Timber line at of Carter Gulch, Innoko district. Kaiyuh district, Yukon region, Alaska. 1913. Plate 5-A in U.S. Geological Survey. Bulletin 578. 1914. #1:/Alaska-Bulletin 578/mag00116 ID. Maddren, A.G. 116 Otter Creek valley at the placer mines. Iditarod district, Yukon region, Alaska. 1913. Plate 6-A in U.S. Geological Survey. Bulletin 578. 1914. #1:/Alaska-Bulletin 587/mgc00447 ID. Martin, G.C. 447 Cherty slate cut by dike of hornblende andesite porphyry on shore of Port Graham. Seldovia district, Cook Inlet region, Alaska. 1913. Plate 15-A in U.S. Geological Survey. Bulletin 587. 1915. #1:/Alaska-Bulletin 587/mgc00458 ID. Martin, G.C. 458 Overturned anticline on east shore of Seldovia Bay, the strata involved in the fold are of quartzitic schist. Seldovia district, Cook Inlet region, Alaska. 1913. Plate 23-A in U.S. Geological Survey. Bulletin 587. 1915. #1:/Alaska-Bulletin 587/mgc00481 ID. Martin, G.C. 481 Closely folded slate on west shore of Kenai Lake. Tustumena district, Cook Inlet region, Alaska. 1911. Plate 15-B in U.S. Geological Survey. Bulletin 587. 1915. #1:/Alaska-Bulletin 587/mgc00489 ID. Martin, G.C. 489 Trail Glacier, from bridge no. 66, Alaska Northern Railway. Wells district, Cook Inlet region, Alaska. September 21, 1911. Plate 9-A in U.S. Geological Survey. Bulletin 587. 1915. #1:/Alaska-Bulletin 587/mgc00490 ID. Martin, G.C. 490 Folds in massive graywacke in railroad cut at Kern Creek. Hope district, Cook Inlet region, Alaska. 1911. Plate 23-B in U.S. Geological Survey. Bulletin 587. 1915. #1:/Alaska-Bulletin 587/mgc00501 ID. Martin, G.C. 501 Kenai formation and Quaternary deposits with shell bed at mouth of Cottonwood Creek. La Touche district, Cook Inlet region, Alaska. 1911. Plate 21-A in U.S. Geological Survey. Bulletin 587. 1915. #1:/Alaska-Bulletin 587/mgc00507 ID. Martin, G.C. 507 Kenai formation, with lignite beds, overlain by Quaternary gravels 9.5 miles south of Anchor Point. Nuka district, Cook Inlet region, Alaska. 1911. Plate 21-B in U.S. Geological Survey. Bulletin 587. 1915. #1:/Alaska-Bulletin 587/stw00156 ID. Stanton, T.W. 156 Site of Russian Coal mine at Port Graham, shows low terrace characteristic of Cook Inlet forelands, capped by gravels and underlain by a local block of coal bearing rocks, which outcrop at the base of the bluff. The shaft and drift opened by the Russians in 1855 may be seen on the beach. Seldovia district, Cook Inlet region, Alaska. 1913. Plate 5-B in U.S. Geological Survey. Bulletin 587. 1915. #1:/California-Bulletin 603/anr00146 ID. Anderson, R. 146 Joaquin Rocks, formed by massive sandstone of the Panoche formation, looking north from point near summit of Joaquin Ridge. Fresno County, California. 1910. Plate 4-A in U.S. Geological Survey. Bulletin 603. 1915. #1:/California-Bulletin 603/anr00147 ID. Anderson, R. 147 Joaquin Rocks, formed by massive sandstone of the Panoche formation, looking north from point near summit of Joaquin Ridge. Fresno County, California. 1910. Plate 4-A in U.S. Geological Survey. Bulletin 603. 1915. #1:/California-Bulletin 603/anr00160 ID. Anderson, R. 160 Hills formed by northeastward-dipping Cretaceous and Tertiary strata north of Coalinga district, looking south along the central part of Ragged Valley from the north bank of Salt Creek. Note the subdued topography characteristic of the two shale zones and the large landslip in the foreground to the right. Joaquin Rocks are shown on the skyline to the right. Fresno County, California. 1910. Plate 2 in U.S. Geological Survey. Bulletin 603. 1915. #1:/California-Bulletin 603/anr00161 ID. Anderson, R. 161 Hills formed by northeastward-dipping Cretaceous and Tertiary strata north of Coalinga district, looking south along the central part of Ragged Valley from the north bank of Salt Creek. Note the subdued topography characteristic of the two shale zones and the large landslip in the foreground to the right. Joaquin Rocks are shown on the sky line to the right. Fresno County, California. 1910. Plate 2 in U.S. Geological Survey. Bulletin 603. 1915. #1:/California-Bulletin 603/anr00166 ID. Anderson, R. 166 Typical cliffs of white quartzose sandstone of the Tejon formation, in the Cantua region, looking south from the divide between the Cantua and Salt Creeks; the Tejon here is formed almost wholly of sandstone and contains but little of the carbonaceous shale which becomes so abundant about The Vallecitos. Fresno County, California. 1910. Plate 7 in U.S. Geological Survey. Bulletin 603. 1915. #1:/California-Bulletin 603/anr00167 ID. Anderson, R. 167 Typical cliffs of white quartzose sandstone of the Tejon formation, in the Cantua region, looking south from the divide between the Cantua and Salt Creeks; the Tejon here is formed almost wholly of sandstone and contains but little of the carbonaceous shale which becomes so abundant about The Vallecitos. Fresno County, California. C. 1910. Plate 7 in U.S. Geological Survey. Bulletin 603. 1915. #1:/California-Bulletin 603/anr00172 ID. Anderson, R. 172 Typical exposure of the siliceous Kreyenhagen shale on Domengine Creek: showing characteristic surface crumpling. Fresno County, California. C. 1910. Plate 8-A in U.S. Geological Survey. Bulletin 603. 1915. #1:/California-Bulletin 603/anr00175 ID. Anderson, R. 175 Unconformity of sandstone of the Vaqueros formation on Kreyhagen shale along the east face of the Ciervo Hills, looking north one mile south of Arroyo Hondo. Fresno County, California. C. 1910. Plate 9-B in U.S. Geological Survey. Bulletin 603. 1915. #1:/California-Bulletin 603/anr00185 ID. Anderson, R. 185 Characteristic outcrop of the Big Blue serpentinous member of the Vaqueros formation near Cantu Creek, looking east at outcrop about half a mile south of Arroyo Hondo. The central outcrop is formed of indurated green and brown shale compose of comminuted fragments of serpentine derived from the serpentine area near New Idria. The freedom from fragments of quartzose rock is remarkable. Fresno County, California. C. 1910. Plate 11-A in U.S. Geological Survey. Bulletin 603. 1915. #1:/California-Bulletin 603/anr00189 ID. Anderson, R. 189 Huge serpentine boulders in the Big Blue member on Martinez Creek. Fresno County, California. C. 1910. Plate 11-B in U.S. Geological Survey. Bulletin 603. 1915. #1:/California-Bulletin 603/anr00210 ID. Anderson, R. 210 Terrace deposits of the Tulare (?) formation at he crest of the Panoche Hills, looking north from a point near the south end of the hills. The flat topped hill in the foreground and at the left are formed by steeply tilted beds of the Panoche formation capped by flat lying clay and gravel of the Tulare (?). Fresno County, California. C. 1910. Plate 12-A in U.S. Geological Survey. Bulletin 603. 1915. #1:/California-Bulletin 603/anr00211 ID. Anderson, R. 211 Terrace deposits of the Tulare (?) formation at he crest of the Panoche Hills, looking north from a point near the south end of the hills. The flat topped hill in the foreground and at the left are formed by steeply tilted beds of the Panoche formation capped by flat lying clay and gravel of the Tulare (?). Fresno County, California. C. 1910. Plate 12-A in U.S. Geological Survey. Bulletin 603. 1915. #1:/California-Bulletin 603/anr00212 ID. Anderson, R. 212 Terrace deposits of the Tulare (?) formation at he crest of the Panoche Hills, looking north from a point near the south end of the hills. The flat topped hill in the foreground and at the left are formed by steeply tilted beds of the Panoche formation capped by flat lying clay and gravel of the Tulare (?). Fresno County, California. C. 1910. Plate 12-A in U.S. Geological Survey. Bulletin 603. 1915. #1:/California-Bulletin 603/anr00268 ID. Anderson, R. 268 Characteristic out crops of conglomerate in the Panoche formation north of Panoche Pass, looking north across the Ortigalito Creek near schoolhouse. Merced County, California. C. 1910. Plate 4-B in U.S. Geological Survey. Bulletin 603. 1915. #1:/California-Bulletin 603/anr00269 ID. Anderson, R. 269 Characteristic out crops of conglomerate in the Panoche formation north of Panoche Pass, looking north across the Ortigalito Creek near schoolhouse. Merced County, California. C. 1910. Plate 4-B in U.S. Geological Survey. Bulletin 603. 1915. #1:/California-Bulletin 603/anr00284 ID. Anderson, R. 284 Unconformity of the oil sands of the Vaqueros formation on oily Kreyenhagen shale along Silver Creek, looking north at bank of creek below New Bedford well. Fresno County, California. C. 1910. Plate 9-A in U.S. Geological Survey. Bulletin 603. 1915. #1:/California-Bulletin 603/anr00292 ID. Anderson, R. 292 Sandstone dikes in the Moreno formation in the Panoche Hills, looking north across Moreno Gulch. The lateral ridges are approximately determined by siliceous shale. The clastic dikes are almost exactly normal to the bedding of the shale. Fresno County, California. C. 1910. Plate 5 in U.S. Geological Survey. Bulletin 603. 1915. #1:/California-Bulletin 603/anr00293 ID. Anderson, R. 293 Sandstone dikes in the Moreno formation in the Panoche Hills, looking north across Moreno Gulch. The lateral ridges are approximately determined by siliceous shale. The clastic dikes are almost exactly normal to the bedding of the shale. Fresno County, California. C. 1910. Plate 5 in U.S. Geological Survey. Bulletin 603. 1915. #1:/Alaska-Bulletin 607/jbl00435 ID. Johnson, B.L. 435 Irregular shaped forms of ellipsoidal greenstones in plan east end of Bligh Island. Alaska Gulf region, Alaska. 1911. Plate 7-A in U.S. Geological Survey. Bulletin 605. 1915 #1:/Florida-Bulletin 604/magc0058 ID. Matson, C.G. 58 General view of Cummer Lumber Co.'s mine at Newberry. Alachua County, Florida. C. 1913. Plate 13-B in U.S. Geological Survey. Bulletin 604. 1915. #1:/Florida-Bulletin 604/magc0060 ID. Matson, C.G. 60 Relations of rock phosphate to underlying limestone in Cummer Lumber Co.'s mine at Newberry. Alachua County, Florida. 1913. Plate 13-A in U.S. Geological Survey. Bulletin 604. 1915. #1:/Florida-Bulletin 604/magc0073 ID. Matson, C.G. 73 Phosphate deposit containing boulders of flint and pillars of limestone, the whole covered by Pleistocene sands. Florida. 1913. Plate 7-A in U.S. Geological Survey. Bulletin 604. 1915. #1:/Florida-Bulletin 604/magc0074 ID. Matson, C.G. 74 Boulders of rock phosphate embedded in a matrix of clay and soft phosphate Newberry region. Alachua County, Florida. 1913. Plate 4-A in U.S. Geological Survey. Bulletin 604. 1915. #1:/Alaska-Bulletin 605/pai00654 ID. Paige, S. 654 Coarse massive phase of conglomerate of Orca group near Rocky Point. Alaska Gulf region, Alaska. 1905. Plate 9-B in U.S. Geological Survey. Bulletin 605. 1915. Figure 56 in U.S. Geological Survey. Bulletin 989-F. 1954. #1:/Alaska-Bulletin 605/pai00658 ID. Paige, S. 658 Shale interbedded with ellipsoidal greenstone, showing irregular lower surface and smooth upper surface of shale bed. Alaska Gulf region, Alaska. 1905. Plate 7-B in U.S. Geological Survey. Bulletin 605. 1915. #1:/California-Bulletin 603/prw00003 ID. Pack, R.W. 3 Composed as one photo. Terrace deposits in Little Panoche valley, looking south up the valley from a point about 1.25 miles south of the Mercy School. The Franciscan rocks form the high ridge on the right; Glaucophane Ridge, separating Little Panoche and Panoche valleys, is shown in the distance at the center; the foothills on the west slope of the Panoche Hills appear at the left. Fresno County, California. C. 1910. Plate 12-B in U.S. Geological Survey. Bulletin 603. 1915. #1:/California-Bulletin 603/prw00013 ID. Pack, R.W. 13 Terrace gravels and sands resting on shale of the Moreno formation on Ortigalito Creek. The Moreno dips directly away from the observer at an angle of 45 degrees. Note the thin dark colored terrace gravels capping the thick light-colored terrace sands. Merced County, California. C. 1910. Plate 13-B in U.S. Geological Survey. Bulletin 603. 1915. #1:/California-Bulletin 603/prw00040 ID. Pack, R.W. 40 Sandstone dikes in the Kreyenhagen shale. Small pit about half a mile north of George Crow's ranch house near Orestimba Creek. The shale dips at a low angle to the right. Its attitude is shown near the top of the cut. A sandstone dike standing vertical trends diagonally across from the lower right hand corner; at the left it joins a second dike at right angles. Stanislaus County, California. C. 1910. Plate 8-B in U.S. Geological Survey. Bulletin 603. 1915. #1:/California-Bulletin 603/prw00055 ID. Pack, R.W. 55 Cavernous-weathering concretionary sandstone of the Panoche formation on El Puerto Creek. Fresno County, California. C. 1910. Plate 13-A in U.S. Geological Survey. Bulletin 603. 1915. #1:/Utah-Bulletin 612/blac0118 ID. Blackwelder, E. 118 Z-shaped folds near east end of Ogden Canyon, diagram lines follow the outcrops of the folded beds. Weber County, Utah. 1909. Plate 26-A in U.S. Geological Survey. Bulletin 612. 1915. #1:/Utah-Bulletin 612/blac0127 ID. Blackwelder, E. 127 Cambrian quartzite resting on Archean gneiss near Willard, Box Elder County, Utah. 1909. Plate 29-B in U.S. Geological Survey. Bulletin 612. 1915. #1:/Utah-Bulletin 612/blac0130 ID. Blackwelder, E. 130 Lake Bonneville shore at Brigham, Box Elder County, Utah. 1909. Plate 29-B in U.S. Geological Survey. Bulletin 612. 1915. #1:/Utah-Bulletin 612/blac0145 ID. Blackwelder, E. 145 Recent fault scarp at the mouth of Ogden canyon, scarp is dark wavy line crossing the meadow. Weber County, Utah. 1909. Plate 26-B in U.S. Geological Survey. Bulletin 612. 1915. #1:/ Arizona-Grand Canyon National Park/cnw000ae ID. Carkhuff, N.W. ae Grand Canyon National Park, Arizona South wall of Grand Canyon east of Grandview Point. View eastward, (from top to bottom) Kaibab limestone, base of gray sandstone (Coconino) on 1,000 feet of red shale and red sandstone (Supai) extending to top of Redwall limestone; top limestone of Tonto group. 1900. Plate 32 in U.S. Geological Survey. Bulletin 613. 1916. #1:/California-Bulletin 613/dnh01160 ID. Darton, N.H. 1160 Desert at Fenner, view southeastward to Pluto Mountains. Knob of rhyolite in left middle distance. San Bernardino County, California. 1906. Plate 39 in U.S. Geological Survey. Bulletin 613. 1916. #1:/New Mexico-Bulletin 613/dnh01373 ID. Darton, N.H. 1373 Mesa Encantada, seen from the north, the mesa is about 350 feet high, and its width is about one-third its length. The rock is buff massive sandstone of the lower part of the Zuni formation. Cibola County, New Mexico. 1914. Plate 14-A in U.S. Geological Survey. Bulletin 613. 1916. #1:/California-Bulletin 613/dnh01402 ID. Darton, N.H. 1402 Mount Pisgah, between Ludlow and Barstow, a recent cinder cone and its great lava sheet. Southward from a point near Santa Fe railway, note broken blisters and caverns in lava and ropy surface of lava in the foreground. San Bernardino County, California. October 1914. Plate 40 in U.S. Geological Survey. Bulletin 613. 1916. Plate 32-A in U.S. Geological Survey. Water-supply paper 578. 1929. #1:/ Arizona-Petrified Forest National Park/dnh01414 ID. Darton, N.H. 1414 Petrified Forest National Park, Arizona. Petrified logs south of Adamana, the logs were buried in the clays shown in the view. C. 1914. Plate 21-A in U.S. Geological Survey. Bulletin 613. 1916. #1:/Arizona--Bulletin 613/dnh01566 ID. Darton, N.H. 1566 An evening with Navajo Indians about the camp fire, north-central, Arizona. C. 1905. Plate 23-B in U.S. Geological Survey. Bulletin 613. 1916. #1:/Kansas-Bulletin 613/dnh01567 ID. Darton, N.H. 1567 Pulpit rock, near Alum Creek south of Carneiro, a hard mass of Dakota sandstone which has resisted erosion than the underlying softer bed that forms its pedestal. Ellsworth County, Kansas. Plate 3-A in U.S. Geological Survey. Bulletin 613. 1916. #1:/California-Bulletin 612/ghs00761 ID. Gale, H.S. 761 Tertiary gold-gravel deposits between Gold Run and Dutch Flat, looking back over the gold gravels from Gold Run; note the flume in which water is conducted, formerly used in the washings but now employed for irrigation. Placer County, California. 1914. Plate 48-A in U.S. Geological Survey. Bulletin 612. 1915. #1:/New Mexico-Bulletin 613/lwt00050 ID. Lee, W.T. 50 Santo Domingo, an Indian pueblo on the Rio Grande at the mouth of Galisteo Creek; Rio Grande in the distance. Sandoval County, New Mexico. C. 1914. Plate 12-B in U.S. Geological Survey. Bulletin 613. 1916. #1:/Arizona-Bulletin 613/lwt00154 ID. Lee, W.T. 154 Edge of desert plain on west side of Hualpai mountains, the sandy plain gives place abruptly to a slope of granite which is weathered into huge fragments. Mohave County, Arizona. 1914. Plate 37-B in U.S. Geological Survey. Bulletin 613. 1916. #1:/New Mexico-Bulletin 613/lwt00164 ID. Lee, W.T. 164 West front of Sandia Mountains near Bernalillo, granite and schist capped by sandstone and thick beds of limestone (Magdalena group). Plain of Santa Fe marl in foreground. Sandoval County, New Mexico. 1914. +Plate 13-A in U.S. Geological Survey. Bulletin 613. 1916. #1:/Wyoming-Bulletin 612/lwt00876 ID. Lee, W.T. 876 Small "soda lake" on the plain near Laramie, the bed of the "lake," which contains water only in wet weather, is when dry covered with a white incrustation of salts, mostly alkali, left by the evaporation of the water. Albany County, Wyoming. C. 1914. Plate 8-B in U.S. Geological Survey. Bulletin 612. 1915. #1:/Wyoming-Bulletin 612/lwt00881 ID. Lee, W.T. 881 Natural monuments on the plain near Red Buttes, eroded from red sandstone of the Casper formation; these monuments are 20 to 50 feet high. Albany County, Wyoming. C. 1914. Plate 9-C in U.S. Geological Survey. Bulletin 612. 1915. #1:/Wyoming-Bulletin 612/lwt00901 ID. Lee, W.T. 901 Platte River at Fort Steele, a characteristic view of the Cretaceous rocks in central Wyoming. Carbon County, Wyoming. C. 1914. Plate 12-A in U.S. Geological Survey. Bulletin 612. 1915. #1:/Wyoming-Bulletin 612/lwt00906 ID. Lee, W.T. 906 Gap in the Cambrian quartzite through which the westbound tourist passes after leaving Rawlins: sagebrush in the foreground. Carbon County, Wyoming. C. 1914. Plate 13-A in U.S. Geological Survey. Bulletin 612. 1915. #1:/Wyoming-Bulletin 612/lwt00918 ID. Lee, W.T. 918 Characteristic view of the north wall of the canyon through which the tourist passes near Point of Rocks, the bluffs are composed of the coarse sandstone which separates the two groups of coal beds of the Mesaverde formation. The Rock Springs coal group lies below this sandstone and Almond coal group above it. Carbon County, Wyoming. C. 1914. Plate 14-B in U.S. Geological Survey. Bulletin 612. 1915. #1:/Wyoming-Bulletin 612/lwt00921 ID. Lee, W.T. 921 Coal bearing sandstone of Mesaverde formation in the western part of Rock Springs dome east of Rock Springs, Sweetwater County, Wyoming. C. 1914. Plate 15-A in U.S. Geological Survey. Bulletin 612. 1915. #1:/Wyoming-Bulletin 612/lwt00925 ID. Lee, W.T. 925 Willis T. Lee on gasoline railroad speeder, doing research for Union Pacific guidebook. Sweetwater County, Wyoming. C. 1914. #1:/Wyoming-Bulletin 612/lwt00926 ID. Lee, W.T. 926 Transportation, old and new, a 14-horse team hauling freight wagons crossing the railroad: note 'speeder" at right. Sweetwater County, Wyoming. C. 1914. #1:/Wyoming-Bulletin 612/lwt00927 ID. Lee, W.T. 927 Transportation, old and new, a 14-horse team hauling freight from the railroad (in foreground, note 'speeder" at right). The bluff in the distance is White Mountain and is composed of Tertiary beds. Sweetwater County, Wyoming. C. 1914. Plate 15-B in U.S. Geological Survey. Bulletin 612. 1915. #1:/Wyoming-Bulletin 612/lwt00928 ID. Lee, W.T. 928 Near view of White Mountain, consists of pink sandstone and shale of the Wasatch group below and the light-green beds of the Green River formation above. Sweetwater County, Wyoming. C. 1914. Plate 15-C in U.S. Geological Survey. Bulletin 612. 1915. #1:/Wyoming-Bulletin 612/lwt00933 ID. Lee, W.T. 933 Natural monuments west of Castle Rock, some of these monuments have assumed curious shapes, like the "teapot and cup" shown above. They are composed of the regularly laminated Green River shale capped by hard brown sandstone. Natrona County, Wyoming. C. 1914. Plate 17-B in U.S. Geological Survey. Bulletin 612. 1915. #1:/Utah-Bulletin 612/lwt00947 ID. Lee, W.T. 947 "Steamboat Rock" in Echo Canyon, named is applied to rock mass in foreground because seen at some angles it resembles the bow of a steamship. It consists of red conglomerate of Tertiary age. Summit County, Utah. C. 1914. Plate 22-A in U.S. Geological Survey. Bulletin 612. 1915. #1:/Utah-Bulletin 612/lwt00951 ID. Lee, W.T. 951 The Narrows in Echo Canyon, fortifications were constructed by the Mormons in these narrows during the so-called Mormon war of 1857. The walls are composed of coarse red conglomerate of the Wasatch group. Note gasoline "speeder" near railroad signal. Summit County, Utah. C. 1914. Plate 22-B in U.S. Geological Survey. Bulletin 612. 1915. #1:/Utah-Bulletin 612/lwt00953 ID. Lee, W.T. 953 North wall of Echo canyon, at its junction with Weber Canyon near the town of Echo, the rocks consist of coarse red conglomerate of the Wasatch group. Summit County, Utah. C. 1914. Plate 23-A in U.S. Geological Survey. Bulletin 612. 1915. #1:/Utah-Bulletin 612/lwt00954 ID. Lee, W.T. 954 Pulpit Rock at Echo composed of red conglomerate. Summit County, Utah. C. 1914. Plate 23-B in U.S. Geological Survey. Bulletin 612. 1915. #1:/Utah-Bulletin 612/lwt00956 ID. Lee, W.T. 956 Side view showing, on the butte to the right, the :Witch's Cap," which suggested the name of the group. Summit County, Utah. C. 1914. Plate 24-B in U.S. Geological Survey. Bulletin 612. 1915. #1:/Utah-Bulletin 612/lwt00957 ID. Lee, W.T. 957 The Witches, near Echo, as seen from the train; a group of natural monuments carved by wind and rain from conglomerate probably of Tertiary age. Summit County, Utah. C. 1914. Similar to plate 24-A in U.S. Geological Survey. Bulletin 612. 1915. #1:/Wyoming-Bulletin 612/lwt01306 ID. Lee, W.T. 1306 Natural monuments on the plain near Red Buttes, eroded from red sandstone of the Casper formation; these monuments are 20 to 50 feet high. Albany County, Wyoming. C. 1914. Plate 9-A in U.S. Geological Survey. Bulletin 612. 1915. #1:/Wyoming-Bulletin 612/lwt01307 ID. Lee, W.T. 1307 Natural monuments on the plain near Red Buttes, eroded from red sandstone of the Casper formation; these monuments are 20 to 50 feet high. Albany County, Wyoming. 1914. Plate 9-B in U.S. Geological Survey. Bulletin 612. 1915. #1:/Wyoming-Bulletin 612/lwt01308 ID. Lee, W.T. 1308 Fossil fish (Diplomystus dentatus) showing the bones, fin ray, etc., embedded in slab of rock taken the quarry at Fish Cut, Fossils found in the Green River (Teritary) formation. Sweetwater County, Wyoming. 1914. Plate 19-A in U.S. Geological Survey. Bulletin 612. 1915. #1:/Wyoming-Bulletin 612/lwt01309 ID. Lee, W.T. 1309 Fossil leaf of the sweet gum tree (Liquidambar) as it appears on slab of rock from the quarry at Fish Cut. Fossils found in the Green River (Teritary) formation. Sweetwater County, Wyoming. 1914. Plate 19-B in U.S. Geological Survey. Bulletin 612. 1915. #1:/United States-Bulletin 612/lwt01310 ID. Lee, W.T. 1310 Model of an armored dinosaur (Stegosurus), the bones this animal which was about 10 feet high was found in the Morrison formation. United States. Plate 10-A in U.S. Geological Survey. Bulletin 612. 1915. #1:/United States-Bulletin 612/lwt01444 ID. Lee, W.T. 1444 Sketch of a horned toad (Phrynosoma cornutum), a modern lizard about 3 inches long, that is armed like some of the ancient dinosaurs. Horned toads are distributed generally over western North America and especially abundant on the dry sandy plains. United States. Plate 11-A in U.S. Geological Survey. Bulletin 612. 1915. #1:/United States-Bulletin 612/lwt01445 ID. Lee, W.T. 1445 Sketch of skeleton of head of Hesperornis, a large diving bird having teeth, which were probably used in catching and holding fish on which it fed. United States. Plate 5-A in U.S. Geological Survey. Bulletin 612. 1915. #1:/Alaska-Bulletin 608/pje00007 ID. Pogue, J.E. 7 Typical exposure of the limestone and argillite formation (Mesozoic) southwest of Nenana Glacier. Nenana district, Yukon region, Alaska. 1913. Plate 8-A in U.S. Geological Survey. Bulletin 608. 1915. #1:/Alaska-Bulletin 608/pje00010 ID. Pogue, J.E. 10 Northward across Nenana Glacier shows lateral overflow of the glacier and vertical jointing of the granite mountains in the background. Nenana district, Yukon region, Alaska. 1913. Plate 8-B in U.S. Geological Survey. Bulletin 608. 1915. #1:/Montana-Bulletin 611/rgs00035 ID. Rogers, G.S. 35 Bluffs of Lance formation on Yellowstone River west of Hysham. Treasure County, Montana. 1911. Plate 11-A U.S. Geological Survey. Bulletin 611. 1915. #1:/Montana-Bulletin 611/rgs00087 ID. Rogers, G.S. 87 Fossil palm leaf of Eocene age found near Hysham. The climate of Montana must have been warmer and more moist than it is today to have permitted the grow of palms and other subtropical plants. Treasure County, Montana. 1911. Plate 11-B U.S. Geological Survey. Bulletin 611. 1915. #1:/Utah-Bulletin 612/srw00671 ID. Stone, R.W. 671 "The Gates" of Bear River, from the east near Cache Junction, the three terraces mark different levels ancient Lake Bonneville. Cache County, Utah. 1914. Plate 30-A U.S. Geological Survey. Bulletin 612. 1915. #1:/South Dakota-Bulletin 610/swt00066 ID. Schaller, W.T. 66 Gigantic crystals of spodumene, Etta Mines; molds of two immense crystals. Black Hills, Pennington County, South Dakota. 1904. Plate 8-B in U.S. Geological Survey. Bulletin 610. 1916. #1:/New Mexico-Bulletin 618/dnh01273 ID. Darton, N.H. 1273 North end of Florida Mountains 12 miles south east of Deming, looking southeast. Most of the rocks are agglomerate and flows, at extreme right edge Paleozoic limestone rests on granite. Luna County, New Mexico. 1911. Plate 3-A U.S. Geological Survey. Bulletin 618. 1916. #1:/New Mexico-Bulletin 618/dnh01274 ID. Darton, N.H. 1274 Goodsight Peak, 8 miles east of Florida Station, looking northeast. Ridge of massive bedded agglomerate on left, overlying sandstone and tuffs. Three sheets of basalt occur in high ridge in distance. Luna County, New Mexico. 1911. Plate 5-B U.S. Geological Survey. Bulletin 618. 1916. #1:/New Mexico-Bulletin 618/dnh01275 ID. Darton, N.H. 1275 Cooks Peak from the west, Paleozoic limestones in foreground. The peak is porphyry. Mora County, New Mexico. 1911. Plate 2-B in U.S. Geological Survey. Bulletin 618. 1916. #1:/New Mexico-Bulletin 618/dnh01279 ID. Darton, N.H. 1279 San Vicente arroyo near Whitewater, looking downstream, shows wide alluvial flat trenched by arroyo working upstream. Grant County, New Mexico. 1911. Plate 6-B in U.S. Geological Survey. Bulletin 618. 1916. #1:/New Mexico-Bulletin 618/dnh01284 ID. Darton, N.H. 1284 Tres Hermanas Mountains. Peaks of porphyry 25 miles south of Deming, looking northeast. Luna County, New Mexico. 1911. Plate 4-B U.S. Geological Survey. Bulletin 618. 1916. #1:/New Mexico-Bulletin 618/dnh01285 ID. Darton, N.H. 1285 A watering place in the desert, well with pump worked by burro supplies water for sheep, typical view of bolson north of Tres Hermanas Mountains; Florida Mountains in distance. Luna County, New Mexico. 1911. Plate 12-A U.S. Geological Survey. Bulletin 618. 1916. #1:/New Mexico-Bulletin 618/dnh01288 ID. Darton, N.H. 1288 Discharge from well pumped by gasoline engine at Pierce ranch near Columbus, shows the wide bolson of the Mimbres near the International boundary, looking north. Luna County, New Mexico. 1911. Plate 12-B U.S. Geological Survey. Bulletin 618. 1916. #1:/New Mexico-Bulletin 618/dnh01290 ID. Darton, N.H. 1290 Limestone knobs at north end of Sierra Rica, looking northwest. The rocks are Comanche age. Luna County, New Mexico. 1911. Plate 7-A U.S. Geological Survey. Bulletin 618. 1916. #1:/New Mexico-Bulletin 613/dnh01315 ID. Darton, N.H. 1315 Crater of extinct geyser three miles west of Suwanee, view northward; railway in distance. The material is silica deposited by hot water, which has built up a low cone around the crater. Valencia County, New Mexico. 1911. Plate 13-A U.S. Geological Survey. Bulletin 613. 1916. #1:/Montana-Bulletin 647/lct00012 ID. Lupton, C.T. 12 Sandstone "rim rock" 1 mile east of Musselshell on north side of river. Musselshell County, Montana. 1909. Plate 3-A in U.S. Geological Survey. Bulletin 647. 1917. #1:/Montana-Bulletin 647/lct00013 ID. Lupton, C.T. 13 Contrasting topography of Bearpaw (left) and Lance (right) formations in sec. 5, T 9 N., R. 29 E. Musselshell County, Montana. 1909. Plate 4-A in U.S. Geological Survey. Bulletin 647. 1917. #1:/Montana-Bulletin 647/lct00019 ID. Lupton, C.T. 19 Opening of Grant's prospect on Carpenter (Oc) coal bed in sec. 26, T. 9 N., R. 30 E. Musselshell County, Montana. 1909. Plate 7-A in U.S. Geological Survey. Bulletin 647. 1917. #1:/Montana-Bulletin 647/lct00026 ID. Lupton, C.T. 26 Converging beds of sandy shale in Fort Union formation is sec. 3, T. 8 N., R. 31 E. Musselshell County, Montana. 1909. Plate 5-B in U.S. Geological Survey. Bulletin 647. 1917. #1:/Montana-Bulletin 647/lct00039 ID. Lupton, C.T. 39 Power house and tipple at mine no. 2 of Republic Coal Co., at Klein, in Sec. 36, T. 8 N., R. 25 E. Musselshell County, Montana. 1909. Plate 11-A in U.S. Geological Survey. Bulletin 647. 1917. #1:/Montana-Bulletin 647/lct00042 ID. Lupton, C.T. 42 Tipple at Commercial (no. 8) mine of Roundup Coal Mining Co., about a mile west of Roundup, in Sec. 23, T. 8 N., R. 25 E. Musselshell County, Montana. 1909. Plate 11-B in U.S. Geological Survey. Bulletin 647. 1917. #1:/Montana-Bulletin 647/lct00063 ID. Lupton, C.T. 63 Sandstone "rim rock" in sec. 5, T. 5 N., R. 31 E., showing abrupt change in bedding. Yellowstone County, Montana. 1909. Plate 3-B in U.S. Geological Survey. Bulletin 647. 1917. #1:/Montana-Bulletin 647/lct00065 ID. Lupton, C.T. 65 Contrasting topography of upper part of Fort Union formation (upper left) and Lebo shale member of the Fort Union (foreground) in sec. 34, T. 5 N., R. 30 E. Castle Butte in central background. Yellowstone County, Montana. 1909. Plate 4-B in U.S. Geological Survey. Bulletin 647. 1917. #1:/South Dakota/pem00014 ID. Parks, E.M. 14 West face of South Cave Hills, Harding County, South Dakota. 1911. Plate 3-A in U.S. Geological Survey. Bulletin 627. 1916. #1:/South Dakota/pem00015 ID. Parks, E.M. 15 West face of South Cave Hills, Harding County, South Dakota. 1911. Plate 3-A in U.S. Geological Survey. Bulletin 627. 1916. #1:/South Dakota/pem00016 ID. Parks, E.M. 16 West face of South Cave Hills, Harding County, South Dakota. 1911. Plate 3-A in U.S. Geological Survey. Bulletin 627. 1916. #1:/Montana-Bulletin 647/rrw00008 ID. Richards, R.W. 8 Northern slope of Eldridge Mesa and adjacent plateau. Musselshell County, Montana. C. 1908. Plate 2-A in U.S. Geological Survey. Bulletin 647. 1917. #1:/Montana-Bulletin 647/rrw00011 ID. Richards, R.W. 11 Southeast front of Eldridge Mesa and adjacent plateau. Musselshell County, Montana. C. 1908. Plate 2-B in U.S. Geological Survey. Bulletin 647. 1917. #1:/Montana-Bulletin 647/rrw00014 ID. Richards, R.W. 14 Outcrop of Buckey (N) coal bed on fork of Lamott Coulee, in the NW ¬ Sec. 36, T. 6 N., R. 25 E. Musselshell County, Montana. 1908. Plate 8-A in U.S. Geological Survey. Bulletin 647. 1917. #1:/Montana-Bulletin 647/rrw00018 ID. Richards, R.W. 18 Minor fault and fold in Wildhorse (O) coal bed on fork of East Razor Creek in the NE ¬ , Sec. 18, T. 5 N., R. 27 E. Yellowstone County, Montana. 1908. Plate 7-B in U.S. Geological Survey. Bulletin 647. 1917. #1:/Montana-Bulletin 647/rrw00071 ID. Richards, R.W. 71 Rehder (J) coal bed on north side of gulch at Douglas camp in the NW ¬ Sec. 10, T. 6 N., R. 28 E. Musselshell County, Montana. 1908. Plate 10-B in U.S. Geological Survey. Bulletin 647. 1917. #1:/Montana-Bulletin 647/rrw00073 ID. Richards, R.W. 73 Mammoth (K) and Rehder (J) coal beds on south side of gulch at Douglas camp in the NW ¬ Sec. 10, T. 6 N., R. 28 E. Musselshell County, Montana. 1908. Plate 10-A in U.S. Geological Survey. Bulletin 647. 1917. #1:/Montana-Bulletin 647/rrw00092 ID. Richards, R.W. 92 Exposure of Mammoth (K) coal bed at Schlaberg camp, near the SE ¬ Sec. 34, T. 7 N., R. 27 E., showing beginning of a parting that thickens toward the east. Musselshell County, Montana. 1908. Plate 8-B in U.S. Geological Survey. Bulletin 647. 1917. #1:/Montana-Bulletin 647/rrw00093 ID. Richards, R.W. 93 Honeycomb-weathered sandstone of Fort Union formation in T. 7 N., R. 27 E. Musselshell County, Montana. 1908. Plate 5-A in U.S. Geological Survey. Bulletin 647. 1917. #1:/South Dakota-Bulletin 627/winc0065 ID. Winchester, D.E. 65 South face of Slim Buttes, showing cliff formed by Arikaree (?) sandstone. Harding County, South Dakota. 1911. Plate 4-B in U.S. Geological Survey. Bulletin 627. 1916. #1:/South Dakota-Bulletin 627/winc084a ID. Winchester, D.E. 84a Landslide beds of White River formation north of Slim Buttes, thickness of beds included in the slide about 125 feet. Harding County, South Dakota. 1911. Plate 3-B in U.S. Geological Survey. Bulletin 627. 1916. #1:/South Dakota-Bulletin 627/winc084b ID. Winchester, D.E. 84b Landslide beds of White River formation north of Slim Buttes, thickness of beds included in the slide about 125 feet. Harding County, South Dakota. 1911. Plate 3-B in U.S. Geological Survey. Bulletin 627. 1916. #1:/South Dakota-Bulletin 627/winc084c ID. Winchester, D.E. 84c Landslide beds of White River formation north of Slim Buttes, thickness of beds included in the slide about 125 feet. Harding County, South Dakota. 1911. Plate 3-B in U.S. Geological Survey. Bulletin 627. 1916. #1:/South Dakota-Bulletin 627/winc0085 ID. Winchester, D.E. 85 One of the small buttes northeast of Bison, showing White River formation resting on Lance formation. Perkins County, South Dakota. 1911. Plate 4-A in U.S. Geological Survey. Bulletin 627. 1916. #1:/South Dakota-Bulletin 627/winc0099 ID. Winchester, D.E. 99 Jones lignite mine, north of Strool, Perkins County, South Dakota. 1911. Plate 5-B in U.S. Geological Survey. Bulletin 627. 1916. #1:/South Dakota-Bulletin 627/winc0100 ID. Winchester, D.E. 100 Knudsen mine, showing general character of the strip pit mines of the region. Sec. 2 T. 17 N, R. 10 E. Harding (?) County, South Dakota. 1911. Plate 5-A in U.S. Geological Survey. Bulletin 627. 1916. #1:/Colorado-Bulletin 641/winc0278 ID. Winchester, D.E. 278 Green River formation north of White River, nine miles west of Rangely, dark projecting beds are oil shale, cliff about 1,000 feet high. Rio Blanco County, Colorado. 1914. Plate 12-B in U.S. Geological Survey. Bulletin 641. 1917. #1:/Colorado-Bulletin 641/winc0279 ID. Winchester, D.E. 279 Oil shale on east side of Piceance Creek near White River, most of the projecting ledges are rich shale. Rio Blanco County, Colorado. 1914. Plate 11-B in U.S. Geological Survey. Bulletin 641. 1917. #1:/Colorado-Bulletin 641/winc0295 ID. Winchester, D.E. 295 Characteristic weathering of rich, massive oil shale, near Welch ranch, T.1 N., R. 100 W. Rio Blanco County, Colorado. 1914. Plate 16-A in U.S. Geological Survey. Bulletin 641. 1917. Plate 4-A in U.S. Geological Survey. Bulletin 729. 1923. #1:/Colorado-Bulletin 641/winc0299 ID. Winchester, D.E. 299 Characteristic weathering of oil-yielding paper shale, west side of Piceance Creek near White River, Rio Blanco County, Colorado. 1914. Plate 16-B in U.S. Geological Survey. Bulletin 641. 1917. #1:/Colorado-Bulletin 641/winc325a ID. Winchester, D.E. 325a Book Cliffs west of Rifle, oil shale forms upper cliff, about 3, 000 feet of rock exposed. Garfield County, Colorado. 1914. Plate 12-A in U.S. Geological Survey. Bulletin 641. 1917. #1:/Wyoming-Bulletin 641/winc0360 ID. Winchester, D.E. 360 Sampling bed of oil shale south of Green River city, shows characteristic weathering of bed containing alternating rich and poor seams. The richer seams are more resistant. Sweetwater County, Wyoming. 1914. Plate 14-A in U.S. Geological Survey. Bulletin 641. 1917. Plate 4-B in U.S. Geological Survey. Bulletin 729. 1923. #1:/California-Bulletin 614/djs00869 ID. Diller, J.S. 869 Sculptured cliffs along coast line near Santa Barbara, the cliffs consist of gravel, sand, and clay that cap the prominent marine terrace traversed by the railroad. Santa Barbara County, California. 1914. Plate 27 in U.S. Geological Survey. Bulletin 614. 1916. #1:/Oregon-Bulletin 614/djs00871 ID. Diller, J.S. 871 Seining salmon on Columbia River. Oregon. 1914. Plate 6-B in U.S. Geological Survey. Bulletin 614. 1916. #1:/Oregon-Bulletin 614/djs00909 ID. Diller, J.S. 909 Pear and apple orchards in Rogue Valley, Jackson County, Oregon. 1914. Plate 16 in U.S. Geological Survey. Bulletin 614. 1916. #1:/California-Bulletin 614/ghs00770 ID. Gale, H.S. 770 Along the shore of San Pablo bay near Oleum, terrace in middle represents raised beach that can be seen at in several points around San Francisco Bay. Contra Costa County, California. 1914. Plate 24-B in U.S. Geological Survey. Bulletin 614. 1916. #1:/California/hfl00486 ID. Hess, F.L. 486 10 to 12 horse team, and 3(?) oil wagons used for hauling crude oil to various plants of the Yellow Aster Mining and Milling Company, Goler, Kern County, California. December 15, 1909. #1:/United States-Bulletin 652/hfl00849 ID. Hess, F.L. 849 Comparative sizes of a tungsten wire 0.0004 inch (0.01 millimeter) thick; a human hair, 0.003 (0.0075 millimeter) thick; and a strand of spider's silk, 0.0002 inch (0.0005 millimeter) thick. United States. Figure 1 in U.S. Geological Survey. Bulletin 652. 1917. #1:/New Mexico-Bulletin 652/hfl00850 ID. Hess, F.L. 850 Black hubnerite from White Oaks. Lincoln County, New Mexico. Plate 5-B (color added) in U.S. Geological Survey. Bulletin 652. 1917. #1:/England-Bulletin 652/hfl00851 ID. Hess, F.L. 851 Large imperfect crystals of wolframite embedded in quartz and chalcopyrite. Natural size. Cornwall, England. Plate 9 (color added) in U.S. Geological Survey. Bulletin 652. 1917. #1:/California-Bulletin 652/hfl00852 ID. Hess, F.L. 852 Residual scheelite pebble coated with caliche (calcium carbonate), Atolia. San Bernardino County, California. Plate 20-C in U.S. Geological Survey. Bulletin 652. 1917. #1:/Wyoming-Bulletin 656/hdf00010 ID. Hewett, D.F. 10 Outcrop of the uppermost sandstone (Torchlight (?) sandstone member) of the Frontier formation, east of Elk Butte in sec. 32, T. 51 N., R. 100 W. Well no. 2 was later drilled under the escarpment on the left. Wyoming. 1912. Plate 31-B in U.S. Geological Survey. Bulletin 656. 1917. #1:/Wyoming-Bulletin 656/hdf00019 ID. Hewett, D.F. 19 Fault in Sec. 2, T. 50 N, R. 100 W. Middle part of the Mesaverde formation (right) abuts against upper part of the Meeteetse formation, horizontal offset 3, 000 feet; stratigraphic displacement 1, 250 feet. Wyoming. 1912. Plate 30-B in U.S. Geological Survey. Bulletin 656. 1917. Plate 7-C in U.S. Geological Survey. Professional paper 145. 1926. #1:/Wyoming-Professional paper 145/hdf00069 ID. Hewett, D.F. 69 Lower portion of Mesaverde formation at north end of Oregon basin, sec. 13, T. 52 N., R. 101 W: looking northeast. Park County, Wyoming. 1912. Plate 7-C in U.S. Geological Survey. Professional paper 145. 1926. #1:/Wyoming-Professional paper 145/hdf00085 ID. Hewett, D.F. 85 Escarpment of the basal sandstone of the Mesaverde formation dissected near crest of Gooseberry Dome, secs. 15, 16, 21 and 22, T. 47 N., R. 100 W. Park County, Wyoming. 1912. Plate 7-C in U.S. Geological Survey. Professional paper 145. 1926. Plate 30-A in U.S. Geological Survey. Bulletin 656. 1917. #1:/Nevada-Bulletin 648/hjm00075 ID. Hill, J.M. 75 North side of Gold Butte, westward along the depression between the granite and sedimentary rocks. Clark County, Nevada. C. 1912. Plate 2-A in U.S. Geological Survey. Bulletin 648. 1916. #1:/Nevada-Bulletin 648/hjm00076 ID. Hill, J.M. 76 Eastward up Bitter Spring wash, about 2 miles west of the spring. Clark County, Nevada. C. 1912. Plate 2-B in U.S. Geological Survey. Bulletin 648. 1916. #1:/Nevada-Bulletin 648/hjm00077 ID. Hill, J.M. 77 Southwest side of Gold Butte, looking northeasterly, showing the sheeting and weathering of the coarse grained granite. Clark County, Nevada. C. 1912. Plate 2-C in U.S. Geological Survey. Bulletin 648. 1916. #1:/Utah-Bulletin 628/lct00122 ID. Lupton, C.T. 122 Camp set up near Labrums ranch, Deep Creek, about 15 miles northeast of White Rocks Indian agency; note U.S. flag and U.S.G.S. flag, flying. Photographer's shadow in left foreground. Uintah County, Utah. 1910. #1:/Utah-Bulletin 628/lct00177 ID. Lupton, C.T. 177 Coal bearing rocks (Ferron sandstone member of the Mancos shale) near Mounds at the northeast end of Castle Valley: Book Cliffs on the distant horizon, near Sunnyside, Colorado. Emery County, Utah. 1911. Plate 1-A in U.S. Geological Survey. Bulletin 628. 1916. #1:/Utah-Bulletin 628/lct00181 ID. Lupton, C.T. 181 Concretions in the Ferron sandstone member of the Mancos Shale, about 6 miles southeast of Castledale. Emery County, Utah. 1911. Plate 5 in U.S. Geological Survey. Bulletin 628. 1916. #1:/Utah-Bulletin 628/lct00183 ID. Lupton, C.T. 183 Local unconformity in the Dakota sandstone northeast of Ferron. Emery County, Utah. 1911. Plate 2-B in U.S. Geological Survey. Bulletin 628. 1916. #1:/Utah-Bulletin 628/lct00189 ID. Lupton, C.T. 189 Contact of McElmo formation an La Plata sandstone on the west flank of the San Rafael Swell. Formations top to bottom: McElmo, contact between McElmo and La Plata, La Plata sandstone bottom. Emery County, Utah. 1911. Plate 2-A in U.S. Geological Survey. Bulletin 628. 1916. #1:/Utah-Bulletin 628/lct00224 ID. Lupton, C.T. 224 Ferron sandstone member of the Mancos Shale southeast of Emery. Emery County, Utah. 1911. Plate 3-A in U.S. Geological Survey. Bulletin 628. 1916. #1:/Utah-Bulletin 628/lct00273 ID. Lupton, C.T. 273 Paradise fault, near the southwest end of the Emery coal field. Left to right: Youngs Point a few miles north of Emery, fault, Paradise Lake (center), Ferron sandstone member of the Mancos Shale at extreme right. Sevier County, Utah. 1911. Plate 6-B in U.S. Geological Survey. Bulletin 628. 1916. #1:/Utah-Bulletin 628/lct00313 ID. Lupton, C.T. 313 Local unconformity in the Ferron sandstone member of the Mancos Shale, about 10 miles south of Emery. Emery County, Utah. 1911. Plate 3-B in U.S. Geological Survey. Bulletin 628. 1916. #1:/Utah-Bulletin 628/lct00324 ID. Lupton, C.T. 324 Coal bearing rocks (in foreground) near Last Chance creek in southwestern part of Emery coal field. Thousand Lake Mountain is high peak in background. Sevier County, Utah. 1911. Plate 1-B in U.S. Geological Survey. Bulletin 628. 1916. #1:/Utah-Bulletin 628/lct00336 ID. Lupton, C.T. 336 Emery fault, north of Ivie Creek, fault is on the contact between Mesaverde rocks and Mancos shale. Emery County, Utah. 1911. Plate 6-A in U.S. Geological Survey. Bulletin 628. 1916. #1:/Utah/lct00349 ID. Lupton, C.T. 349 Group portrait in camp at Levi's rig no. 2 Moab oil field, left to right, M. Ball, Mills, Millard and Arthur Massey. Grand County, Utah. 1912. #1:/Wyoming-Bulletin 656/lct00482 ID. Lupton, C.T. 482 Fault trace at east end of Red Spring anticline, near Thermopolis. Hot Springs County, Wyoming. 1914. Plate 16-B in U.S. Geological Survey. Bulletin 656. 1917. #1:/Wyoming-Bulletin 656/lct00498 ID. Lupton, C.T. 498 Black Mountain anticline, looking northwest. Big Horn County, Wyoming. 1914. Plate 16-A in U.S. Geological Survey. Bulletin 656. 1917. #1:/Wyoming-Bulletin 656/lct00499 ID. Lupton, C.T. 499 Frontier formation in Lysite Mountain anticline. Hot Springs County, Wyoming. 1914. Plate 5-B in U.S. Geological Survey. Bulletin 656. 1917. #1:/Wyoming-Bulletin 656/lct00512 ID. Lupton, C.T. 512 Standard drilling rig in Grass Creek oil field, westward toward the gap through which Grass Creek enters the basin, the character of the topography and vegetation is well represented. Hot Springs County, Wyoming. 1914. Plate 23-A in U.S. Geological Survey. Bulletin 656. 1917. #1:/Wyoming-Bulletin 656/lct00536 ID. Lupton, C.T. 536 Portable drilling rig on Torchlight dome. Big Horn County, Wyoming. 1914. Plate 8-B in U.S. Geological Survey. Bulletin 656. 1917. #1:/Wyoming-Bulletin 656/lct00588 ID. Lupton, C.T. 588 Peay sandstone member of the Frontier formation on east side of Big Horn River near Greybull. Big Horn County, Wyoming. 1914. Plate 5-A in U.S. Geological Survey. Bulletin 656. 1917. #1:/Wyoming-Bulletin 656/lct00609 ID. Lupton, C.T. 609 Cross section of northwest end of Spring Creek anticline. Big Horn County, Wyoming. 1914. Plate 23-B in U.S. Geological Survey. Bulletin 656. 1917. #1:/Wyoming-Bulletin 656/lct00626 ID. Lupton, C.T. 626 Thermopolis and Mowry shales near Bonanza, Standard drilling rig in foreground. Big Horn County, Wyoming. 1914. Plate 4-B in U.S. Geological Survey. Bulletin 656. 1917. #1:/Wyoming-Bulletin 656/lct00629 ID. Lupton, C.T. 629 Tensleep sandstone on west side of Brokenback anticline. Washakie County, Wyoming. 1914. Plate 2-A in U.S. Geological Survey. Bulletin 656. 1917. #1:/Wyoming-Bulletin 656/lct00644 ID. Lupton, C.T. 644 Mahogany Butte, east of No Wood Creek, in southeastern part of Big Horn basin. Washakie County, Wyoming. 1914. Plate 10-B in U.S. Geological Survey. Bulletin 656. 1917. #1:/Wyoming-Bulletin 656/lct00662 ID. Lupton, C.T. 662 Madison limestone in anticline in Sheep Mountain canyon. Big Horn County, Wyoming. 1914. Plate 2-B in U.S. Geological Survey. Bulletin 656. 1917. #1:/Wyoming-Bulletin 656/lct00674 ID. Lupton, C.T. 674 Angular unconformity between Fort Union and Lance formations on Dry Creek near Greybull. Big Horn County, Wyoming. 1914. Plate 6-B in U.S. Geological Survey. Bulletin 656. 1917. #1:/Wyoming-Bulletin 656/lct00678 ID. Lupton, C.T. 678 Oil thrown into air when well was "shot" on Torchlight dome. Big Horn County, Wyoming. 1914. Plate 8-A in U.S. Geological Survey. Bulletin 656. 1917. #1:/Wyoming-Bulletin 656/lct00693 ID. Lupton, C.T. 693 Surface appearance of No Wood anticline west of No Wood Creek, between Bonanza and Tensleep, beds dip in opposite directions from crest line. Big Horn County, Wyoming. 1914. Plate 10-A in U.S. Geological Survey. Bulletin 656. 1917. #1:/Wyoming-Bulletin 656/lct00696 ID. Lupton, C.T. 696 Unconformable contact between White sandstone of the Cloverly formation and variegated shale of the Morrison formation near Tensleep. Washakie County, Wyoming. 1914. Plate 4-A in U.S. Geological Survey. Bulletin 656. 1917. #1:/Wyoming-Bulletin 656/lct00697 ID. Lupton, C.T. 697 Red sandstone in middle part of Chugwater formation on No Wood Creek near Tensleep. Washakie County, Wyoming. 1914. Plate 3-B in U.S. Geological Survey. Bulletin 656. 1917. #1:/Wyoming/lct00709 ID. Lupton, C.T. 709 Camp at Herold's place on No Wood Creek, near mouth of Otter Creek, left to right C.J. Hares, W.B. Emery, and E.M. Parks, possibly trying to photograph the photographer, note camera on rear of wagon. Washakie County, Wyoming. 1914. #1:/Alaska/sps00879 ID. Smith, P.S. 879 Tree Point Lighthouse, Ketchikan district, Southeastern Alaska region, Alaska. 1913. #1:/Alaska-Bulletin 655/sps00923 ID. Smith, P.S. 923 Exposures of recent lavas on hill west of Sixmile Lake. Iliamna district, Southwestern Alaska region, Alaska. 1914. Plate 11-A in U.S. Geological Survey. Bulletin 655. 1917. #1:/Alaska-Bulletin 655/sps00926 ID. Smith, P.S. 926 Recent lavas and earth flows on hill west Sixmile Lake. Iliamna district, Southwestern Alaska region, Alaska. 1914. Plate 11-B in U.S. Geological Survey. Bulletin 655. 1917. #1:/Alaska-Bulletin 655/sps00942 ID. Smith, P.S. 942 Transverse gap through hills at head of Portage Lake drainage basin. Lake Clark district, Southwestern Alaska region, Alaska. 1914. Plate 2-B in U.S. Geological Survey. Bulletin 655. 1917. #1:/Alaska-Bulletin 655/sps00943 ID. Smith, P.S. 943 Detail view of mud springs in flat north of camp of June 29, 1914. Southwestern Alaska region, Alaska. Plate 10-B in U.S. Geological Survey. Bulletin 655. 1917. Plate 10-B in U.S. Geological Survey. Bulletin 631. 1916. #1:/Alaska-Bulletin 655/sps00944 ID. Smith, P.S. 944 Mud springs in flat north of camp of June 29, 1914. Southwestern Alaska region, Alaska. Plate 10-A in U.S. Geological Survey. Bulletin 655. 1917. #1:/Alaska-Bulletin 655/sps00965 ID. Smith, P.S. 965 Surface of terrace west of camp on Dummy Creek, Mulchatna basin. Mulchatna district, Southwestern Alaska region, Alaska. 1914. Plate 9-A in U.S. Geological Survey. Bulletin 655. 1917. #1:/Alaska-Bulletin 655/sps00971 ID. Smith, P.S. 971 Southward across the Mulchatna valley, showing terraces and distant hills. Mulchatna district, Southwestern Alaska region, Alaska. 1914. Plate 2-A in U.S. Geological Survey. Bulletin 655. 1917. #1:/Alaska-Bulletin 655/sps01007 ID. Smith, P.S. 1007 Flat topped hill south of Whitefish lake Hoholitna River basin. Lake Clark district, Southwestern Alaska region, Alaska. 1914. Plate 8-A in U.S. Geological Survey. Bulletin 655. 1917. #1:/Alaska-Bulletin 655/sps01008 ID. Smith, P.S. 1008 The Hoholitna near camp of July 23, 1914. Lake Clark district, Southwestern Alaska region, Alaska. Plate 3-A in U.S. Geological Survey. Bulletin 655. 1917. #1:/Alaska-Bulletin 655/sps01029 ID. Smith, P.S. 1029 Peat ridges southeast of camp of July 29, 1914, Hoholitna River basin. Lake Clark district, Southwestern Alaska region, Alaska. Plate 8-B in U.S. Geological Survey. Bulletin 655. 1917. #1:/Alaska-Bulletin 655/sps01049 ID. Smith, P.S. 1049 Rufus H. Sargent, topographer at work near cairn on station XLVIII, Southwestern Alaska region, Alaska. July 31, 1914. #1:/Alaska-Bulletin 655/sps01052 ID. Smith, P.S. 1052 Conglomerate pinnacles on ridge north of camp of July 29, 1914. Southwestern Alaska region, Alaska. 1914. Plate 7-A in U.S. Geological Survey. Bulletin 655. 1917. #1:/Alaska-Bulletin 655/sps01053 ID. Smith, P.S. 1053 Near view of conglomerate on ridge north of camp of July 29, 1914. Southwestern Alaska region, Alaska. 1914. Plate 7-B in U.S. Geological Survey. Bulletin 655. 1917. #1:/Alaska-Bulletin 655/sps01064 ID. Smith, P.S. 1064 Near view of Lime Hills Stony River basin. Lake Clark district, Southwestern Alaska region, Alaska. 1914. Plate 6-A in U.S. Geological Survey. Bulletin 655. 1917. #1:/Alaska-Bulletin 655/sps01069 ID. Smith, P.S. 1069 Structure in limestones, Stony River. Lake Clark district, Southwestern Alaska region, Alaska. 1914. Plate 6-B in U.S. Geological Survey. Bulletin 655. 1917. #1:/Alaska-Bulletin 655/sps01078 ID. Smith, P.S. 1078 Flanks of Lime Hills and lowland with lakes near camp of August 3, 1914. Lake Clark district, Southwestern Alaska region, Alaska. Plate 4-A in U.S. Geological Survey. Bulletin 655. 1917. #1:/Alaska-Bulletin 655/sps01087 ID. Smith, P.S. 1087 Morainic hills in Stony River basin near camp of August 5, 1914. looking northward from point near Lime Hills. Lake Clark district, Southwestern Alaska region, Alaska. Plate 9-B in U.S. Geological Survey. Bulletin 655. 1917. #1:/Alaska-Bulletin 655/sps01089 ID. Smith, P.S. 1089 Stony River and distant limestone hills, taken near camp of August 7, 1914. Georgetown district, Kuskokwim region, Alaska. Plate 3-B in U.S. Geological Survey. Bulletin 655. 1917. #1:/Alaska-Bulletin 655/sps01107 ID. Smith, P.S. 1107 Westward down the Kuckokwim from the vicinity of camp of August 17, 1914. Kuskkowim region, Alaska. Plate 2-C in U.S. Geological Survey. Bulletin 655. 1917. #1:/Alaska-Bulletin 655/sps01121 ID. Smith, P.S. 1121 Developments at the Parks Quicksilver prospect, Kuskokwim River. Kuskkowim region, Alaska. 1914. Plate 12-A in U.S. Geological Survey. Bulletin 655. 1917. #1:/Alaska-Bulletin 655/sps01133 ID. Smith, P.S. 1133 Northward on the divide of George and Iditarod Rivers. Georgetown district, Kuskkowim region, Alaska. 1914. Plate 4-B in U.S. Geological Survey. Bulletin 655. 1917. #1:/Alaska-Bulletin 655/sps01216 ID. Smith, P.S. 1216 Stibnite and cinnabar ore from Parks Quicksilver prospect, Kuskokwim River. Kuskkowim region, Alaska. 1914. Plate 12-B in U.S. Geological Survey. Bulletin 655. 1917. #1:/Alaska-Bulletin 657/alask12b ID. Alaska 12b Panoramic cameras set up on Gimbal-ring stand aboard launch. Alaska. C. 1910. Plate 5- A in U.S. Geological Survey. Bulletin 657. 1917. #1:/Alaska-Bulletin 682/bef00806 ID. Burchard, E.F. 806 Indian graveyard on small marble island at entrance to Dry Pass, near Shakan, photographed at half tide, shows characteristic shore outcrop of marble in this locality. Wales district, Southeastern Alaska region, Alaska. 1912. Plate 9-B in U.S. Geological Survey. Bulletin 682. 1920. #1:/Alaska-Bulletin 682/bef00807 ID. Burchard, E.F. 807 Marble quarry of Mission-Alaska Quarry Company just being opened on Orr Island. Craig district, Southeastern Alaska region, Alaska. 1912. Plate 14 in U.S. Geological Survey. Bulletin 682. 1920. #1:/Alaska-Bulletin 682/bef00808 ID. Burchard, E.F. 808 Fossiliferous blue-black limestone beds in tramway cut 250 feet from wharf, Tokeen. Wales district, Southeastern Alaska region, Alaska. 1912. Plate 10-A in U.S. Geological Survey. Bulletin 682. 1920. #1:/Alaska-Bulletin 682/bef00809 ID. Burchard, E.F. 809 Stripping operations of Vermont Marble Co., showing surface of weathered marble. Tokeen. Wales district, Southeastern Alaska region, Alaska. 1912. Plate 10-B in U.S. Geological Survey. Bulletin 682. 1920. #1:/Alaska-Bulletin 682/bef00811 ID. Burchard, E.F. 811 Andesite porphyry dike about 1 foot thick cutting marble beds on west side of Vermont Marble Co.'s quarry, Tokeen. Wales district, Southeastern Alaska region, Alaska. 1912. Plate 11-A in U.S. Geological Survey. Bulletin 682. 1920. #1:/Alaska-Bulletin 682/bef00812 ID. Burchard, E.F. 812 Vermont Marble Co.'s quarry: southwest corner showing stairway. Wales district, Southeastern Alaska region, Alaska. 1912. Plate 13-A in U.S. Geological Survey. Bulletin 682. 1920. #1:/Alaska-Bulletin 682/bef00814 ID. Burchard, E.F. 814 Vermont Marble Co.'s quarry: lowest floor. Wales district, Southeastern Alaska region, Alaska. 1912. Plate 13-B in U.S. Geological Survey. Bulletin 682. 1920. #1:/Alaska-Bulletin 682/bef00815 ID. Burchard, E.F. 815 Face of marble at depth of about 50 feet in Vermont Marble Co.'s quarry, Tokeen. Wales district, Southeastern Alaska region, Alaska. 1912. Plate 11-B in U.S. Geological Survey. Bulletin 682. 1920. #1:/Alaska-Bulletin 682/bef00819 ID. Burchard, E.F. 819 Wharf and water front of Vermont Marble Co.'s property, Tokeen, shows derrick moving blocks of marble. The pile of rock in the water at the right of the wharf is waste marble. Wales district, Southeastern Alaska region, Alaska. 1912. Plate 12-B in U.S. Geological Survey. Bulletin 682. 1920. #1:/Alaska-Bulletin 682/bef00859 ID. Burchard, E.F. 859 Schistose marble on wave-scoured beach of Chatham strait, Admiralty Island, north of Marble Cove. Juneau district, Southeastern Alaska region, Alaska. 1913. Plate 7-A in U.S. Geological Survey. Bulletin 682. 1920. #1:/Alaska-Bulletin 682/bef00862 ID. Burchard, E.F. 862 Near view of wave-scoured marble beach of Chatham strait, Chichagof Island, south of Basket Bay. Juneau district, Southeastern Alaska region, Alaska. 1913. Plate 7-B in U.S. Geological Survey. Bulletin 682. 1920. #1:/Neveda-Bulletin 669/dnh01326 ID. Darton, N.H. 1326 Salt in arroyo near Virgin River bottom 5 miles south of St. Thomas. Clark County, Nevada. C. 1911. Plate 13-B in U.S. Geological Survey. Bulletin 669. 1919. #1:/Neveda-Bulletin 669/dnh01327 ID. Darton, N.H. 1327 Salt exposed on west side of Virgin River 5 miles south of St. Thomas. Clark County, Nevada. C. 1911. Plate 13-A in U.S. Geological Survey. Bulletin 669. 1919. #1:/Oklahoma-Bulletin 661/fae00034 ID. Fath, A.E. 34 Fault scarp showing slickensided surface of sandstone produced by fault movement. Creek County, Oklahoma. C. 1915. Plate 6-B in U.S. Geological Survey. Bulletin 661. 1918. #1:/Oklahoma-Bulletin 661/fae00036 ID. Fath, A.E. 36 Fault scarp showing slickensided surface of sandstone produced by fault movement. Creek County, Oklahoma. C. 1915. Plate 6-B in U.S. Geological Survey. Bulletin 661. 1918. #1:/Alaska-Bulletin 683/hgl00062 ID. Harrington, G.L. 62 Logs in peat in the west bank of the Yukon 5 miles below Anvik. Koyukuk district, Yukon region, Alaska. 1916. Plate 6-B in U.S. Geological Survey. Bulletin 683. 1918. #1:/Alaska-Bulletin 683/hgl00073 ID. Harrington, G.L. 73 Erosional embayment in the bank of the Yukon, below Holy Cross. Koyukuk district, Yukon region, Alaska. 1916. Plate 5-A in U.S. Geological Survey. Bulletin 683. 1918. #1:/Alaska-Bulletin 683/hgl00096 ID. Harrington, G.L. 96 Basalt dike cutting horizontal basalt flows 2.5 miles above Ingrumhart Koyukuk district, Yukon region, Alaska. 1916. Plate 6-A in U.S. Geological Survey. Bulletin 683. 1918 #1:/Alaska-Bulletin 683/hgl00100 ID. Harrington, G.L. 100 A portion of the mining camp on Willow Creek, above Marshall. Marshall district, Yukon region, Alaska. 1916. Plate 7-B in U.S. Geological Survey. Bulletin 683. 1918 #1:/Alaska-Bulletin 683/hgl00103 ID. Harrington, G.L. 103 Altiplanation terraces and solifluction slopes east of Faith Creek. Fairbanks district, Yukon region, Alaska. 1916. Plate 5-B in U.S. Geological Survey. Bulletin 683. 1918. #1:/Alaska-Bulletin 683/hgl00106 ID. Harrington, G.L. 106 Sinter cone of one of the soda springs near Marshall. Marshall district, Yukon region, Alaska. 1916. Plate 7-A in U.S. Geological Survey. Bulletin 683. 1918. #1:/Colorado-Bulletin 681/lgf00137 ID. Loughlin, G.F. 137 Gray zinc carbonate ore. Lake County, Colorado. 1913. Plate 1-A in U.S. Geological Survey. Bulletin 681. 1918. #1:/Colorado-Bulletin 681/lgf00138 ID. Loughlin, G.F. 138 Brown zinc carbonate ore with fine druses of smithsonite. Lake County, Colorado. 1913. Plate 3-A in U.S. Geological Survey. Bulletin 681. 1918. #1:/Colorado-Bulletin 681/lgf00139 ID. Loughlin, G.F. 139 Brown zinc carbonate ore with druses of calamine. Lake County, Colorado. 1913. Plate 4-A in U.S. Geological Survey. Bulletin 681. 1918. #1:/Colorado-Bulletin 681/lgf00140 ID. Loughlin, G.F. 140 Calamine druse coating brown zinc carbonate ore. Lake County, Colorado. 1913. Plate 4- B in U.S. Geological Survey. Bulletin 681. 1918. #1:/Colorado-Bulletin 681/lgf00141 ID. Loughlin, G.F. 141 Chalcophanite and calamine coating brown zinc carbonate ore. Lake County, Colorado. 1913. Plate 1-B in U.S. Geological Survey. Bulletin 681. 1918. #1:/Colorado-Bulletin 681/lgf00142 ID. Loughlin, G.F. 142 White zinciferous clay. Lake County, Colorado. 1913. Plate 6-A in U.S. Geological Survey. Bulletin 681. 1918. #1:/Colorado-Bulletin 681/lgf00143 ID. Loughlin, G.F. 143 Brown dense zinciferous clay. Lake County, Colorado. 1913. Plate 6-B in U.S. Geological Survey. Bulletin 681. 1918. #1:/Colorado-Bulletin 681/lgf00144 ID. Loughlin, G.F. 144 Brown banded zinciferous clay. Lake County, Colorado. 1913. Plate 6-C in U.S. Geological Survey. Bulletin 681. 1918. #1:/Colorado-Bulletin 681/lgf00145 ID. Loughlin, G.F. 145 Brown zinc carbonate ore with druses of aurichalcite. Lake County, Colorado. 1913. Plate 5-A in U.S. Geological Survey. Bulletin 681. 1918. #1:/Colorado-Bulletin 681/lgf0146a ID. Loughlin, G.F. 146a Aragonite filling cavities in brown iron oxide. Lake County, Colorado. 1913. Plate 6-D in U.S. Geological Survey. Bulletin 681. 1918. #1:/Colorado-Bulletin 681/lgf0146b ID. Loughlin, G.F. 146b Aragonite filling cavities in brown iron oxide. Lake County, Colorado. 1913. Plate 6-D in U.S. Geological Survey. Bulletin 681. 1918. #1:/Colorado-Bulletin 681/lgf00149 ID. Loughlin, G.F. 149 Photomicrograph of vein of calamine, aurichalcite and opaline silica in low grade brown zinc ore. Lake County, Colorado. 1913. Plate 6-D in U.S. Geological Survey. Bulletin 681. 1918. #1:/Colorado-Bulletin 681/lgf00150 ID. Loughlin, G.F. 150 Photomicrograph showing aurichalcite and calamine filling cavity in brown zinc carbonate ore. Lake County, Colorado. 1913. Plate 6-D in U.S. Geological Survey. Bulletin 681. 1918. #1:/California-Bulletin 669/pwc00343 ID. Phalen, W.C. 343 Panoramic view showing gypsum and salt beds. Avawatz Salt & Gypsum Co., Avawatz Mountains. San Bernardino County, California. 1911. Plate 14-B in U.S. Geological Survey. Bulletin 669. 1919. #1:/California-Bulletin 669/pwc00345 ID. Phalen, W.C. 345 Panoramic view showing gypsum and salt beds. Avawatz Salt & Gypsum Co., Avawatz Mountains. San Bernardino County, California. 1911. Plate 14-B in U.S. Geological Survey. Bulletin 669. 1919. #1:/California-Bulletin 669/pwc00347 ID. Phalen, W.C. 347 Bedded structure in celestite, Avawatz Salt & Gypsum Co. San Bernardino County, California. 1911. Plate 16-B in U.S. Geological Survey. Bulletin 669. 1919. #1:/California-Bulletin 669/pwc00348 ID. Phalen, W.C. 348 Hogback of celestite with gypsum in background, Avawatz Salt & Gypsum Co. San Bernardino County, California. 1911. Plate 16-A in U.S. Geological Survey. Bulletin 669. 1919. #1:/Kansas-Bulletin 669/pwc00575 ID. Phalen, W.C. 575 Stratified shale and salt, Bevis Rock Salt Co.'s mine Lyons. Photo by Sam Ainsworth. Rice County, Kansas. C. 1911. Plate 17-B in U.S. Geological Survey. Bulletin 669. 1919. #1:/United States-Bulletin 669/pwc00576 ID. Phalen, W.C. 576 Forms of salt crystals. United States. 1911. Plate 2 in U.S. Geological Survey. Bulletin 669. 1919. #1:/Idaho-Bulletin 680/sar00602 ID. Schultz, A.R. 602 Burlap tables arranged for saving fine gold near the mouth of McCoy Creek on Snake River. Bonneville County, Idaho. 1912. Plate 2-A in U.S. Geological Survey. Bulletin 680. 1918. #1:/Idaho-Bulletin 680/sar00603 ID. Schultz, A.R. 603 Auriferous gravels and alluvium carrying fine flakes of gold; note large pebbles along sluicing ditch from which finer material has been washed. Bonneville County, Idaho. 1912. Plate 2-C in U.S. Geological Survey. Bulletin 680. 1918. #1:/Idaho-Bulletin 680/sar00616 ID. Schultz, A.R. 616 Public school building at Irwin, constructed of rhyolite blocks quarried in vicinity, Baldy Mountain, a part of the Snake River Range, in the background. Bonneville County, Idaho. 1912. Plate 2-B in U.S. Geological Survey. Bulletin 680. 1918. #1:/Louisiana-Bulletin 669/vac00281 ID. Veatch, A.C. 281 Myles salt mine, Weeks Island. Almost perpendicular strata or bands of salt lying in closely compressed folds. Iberia Parish, Louisiana. C. 1911. Plate 11-B in U.S. Geological Survey. Bulletin 669. 1919. #1:/Louisiana-Bulletin 669/vac00283 ID. Veatch, A.C. 283 Myles salt mine, Weeks Island: Interior of mine, showing process of working. Iberia Parish, Louisiana. C. 1911. Plate 11-A in U.S. Geological Survey. Bulletin 669. 1919. #1:/Alaska-Professional Paper 109/lek00001 ID. Leffingwell, E.K. 1 (Panorama) Double fold at northern front of Franklin Mountains, Canning River. Anglo- American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. Published as Plate 23 in U.S. Geological Survey. Professional Paper 109. 1919. #1:/Inupiat Heritage Center/lek0001a ID. Leffingwell, E.K. 1a Inupiat Heritage Center, Alaska. Double fold at the northern front of Franklin Mountains on the Canning River. Circa 1910. Plate 23, U.S. Geological Survey Professional Paper 109. #1:/Alaska/lek00002 ID. Leffingwell, E.K. 2 Lake Peters and Lake Schrader in the Sadlerochit River. Mount Chamberlain on the right. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska-Professional Paper 109/lek0002a ID. Leffingwell, E.K. 2a Lake Peters and Lake Schrader in the Sadlerochit River. Mount Chamberlin on the right. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. Plate 11-B, U.S. Geological Survey Professional Paper 109. 1919. #1:/Alaska-Professional Paper 109/lek00003 ID. Leffingwell, E.K. 3 Mount Chamberlin, viewed from Lake Schrader. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. Plate 11-A, U.S. Geological Survey Professional Paper 109. 1919. #1:/Alaska-Professional Paper 109/lek00004 ID. Leffingwell, E.K. 4 Inupiat Heritage Center, Alaska. Ice in Beaufort Sea. Anglo-American Polar Expedition. Barrow district, Northern Alaska region, Alaska. C. 1910. Plate 22-B, U.S. Geological Survey Professional Paper 109. 1919. #1:/Alaska/lek00005 ID. Leffingwell, E.K. 5 Pressure ridge, Beaufort Sea. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00006 ID. Leffingwell, E.K. 6 Ice scene, Beaufort Sea. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska-Professional Paper 109/lek00007 ID. Leffingwell, E.K. 7 Brecciated ice in Beaufort Sea. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. Plate 21-B, U.S. Geological Survey Professional Paper 109. 1919. #1:/Alaska/lek00008 ID. Leffingwell, E.K. 8 Peat blocks broken from high bank, Arctic Coast. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska-Professional Paper 109/lek00009 ID. Leffingwell, E.K. 9 Tundra block broken off along a frost crack on the north shore of Flaxman Island. Ice wedge on the left. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. Plate 31-A, U.S. Geological Survey Professional Paper 109. 1919. #1:/Alaska/lek00010 ID. Leffingwell, E.K. 10 Old ice Arctic Ocean (Beaufort Sea). Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska-Professional Paper 109/lek00011 ID. Leffingwell, E.K. 11 Frost crack on the surface of a recently drained area on Flaxman Island. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. Plate 29-A, U.S. Geological Survey Professional Paper 109. 1919. #1:/Alaska/lek00012 ID. Leffingwell, E.K. 12 Sea ice mounting landward under expansion during warm day. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00013 ID. Leffingwell, E.K. 13 Mound of sand shoved up by ice, Arctic Coast. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00014 ID. Leffingwell, E.K. 14 Ends of prisms of fresh water ice, etched by sunlight. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska-Professional Paper 109/lek00015 ID. Leffingwell, E.K. 15 Two ground ice wedges on Flaxman Island. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. Plate 28-B, U.S. Geological Survey Professional Paper 109. 1919. #1:/Alaska-Professional Paper 109/lek00016 ID. Leffingwell, E.K. 16 Tundra block broken off along a frost crack on the north side of Flaxman Island. Anglo- American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. Plate 31-B, U.S. Geological Survey Professional Paper 109. 1919. #1:/Alaska/lek00017 ID. Leffingwell, E.K. 17 Ground ice wedge, exposed by blocks of tundra breaking off. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00018 ID. Leffingwell, E.K. 18 Frost crack, north shore. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska-Professional Paper 109/lek00019 ID. Leffingwell, E.K. 19 Frost crack lying between parallel ridges which enclose depressed polygonal blocks on Flaxman Island. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. Plate 29-B, U.S. Geological Survey Professional Paper 109. 1919. #1:/Alaska-Professional Paper 109/lek00020 ID. Leffingwell, E.K. 20 Frost crack, parallel ridges, and block ponds on Flaxman Island. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. Plate 30-A, U.S. Geological Survey Professional Paper 109. 1919. #1:/Alaska/lek00021 ID. Leffingwell, E.K. 21 Dog team in difficult sledding near the Beaufort Sea. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00022 ID. Leffingwell, E.K. 22 Old ice and lanes of water, Beaufort Sea. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00023 ID. Leffingwell, E.K. 23 Pressure ridge, Beaufort Sea. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00024 ID. Leffingwell, E.K. 24 Rough ice and soft snow, Beaufort Sea. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00025 ID. Leffingwell, E.K. 25 Pressure ridges, Arctic Ocean. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00026 ID. Leffingwell, E.K. 26 Pressure ridge, Arctic Ocean. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00027 ID. Leffingwell, E.K. 27 Crossing newly opened lane on ice cake, Arctic Ocean. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00028 ID. Leffingwell, E.K. 28 Standing water. Ice prisms viewed on end. Arctic Coast. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska-Professional Paper 109/lek00029 ID. Leffingwell, E.K. 29 Old ice in Beaufort Sea. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. Plate 22-A, U.S. Geological Survey Professional Paper 109. 1919. #1:/Alaska/lek00030 ID. Leffingwell, E.K. 30 Crack in old ice floe Arctic Ocean. Staff is 6 feet long. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska-Professional Paper 109/lek00031 ID. Leffingwell, E.K. 31 Preservation of sea ice under a slumping bank on Flaxman Island. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. Plate 26-B, U.S. Geological Survey Professional Paper 109. 1919. #1:/Alaska-Professional Paper 109/lek00032 ID. Leffingwell, E.K. 32 Sea ice mounting the beach on Flaxman Island. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. Plate 25-B, U.S. Geological Survey Professional Paper 109. 1919. #1:/Alaska/lek00033 ID. Leffingwell, E.K. 33 Sounding through a hole in ice, Arctic Ocean. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00034 ID. Leffingwell, E.K. 34 Trail in soft snow and rough ice. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska-Professional Paper 109/lek00035 ID. Leffingwell, E.K. 35 Sea ice mounting beach, Flaxman Island: Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1908. Plate 25-B in U.S. Geological Survey. Professional Paper 109. 1919. #1:/Alaska/lek00036 ID. Leffingwell, E.K. 36 Epiglacial streams, Okpilak River. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00037 ID. Leffingwell, E.K. 37 Breaking out of Arctic stream. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00038 ID. Leffingwell, E.K. 38 Breaking out of Arctic stream in July. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00039 ID. Leffingwell, E.K. 39 Side stream breaking out in spring, Canning River. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00040 ID. Leffingwell, E.K. 40 Ice mound on Canning River. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00041 ID. Leffingwell, E.K. 41 Forks of Canning River. Aufeis is covering flood plain in July. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska-Professional Paper 109/lek00042 ID. Leffingwell, E.K. 42 Aufeis on the Canning River. June 1908. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. Plate 20-C, U.S. Geological Survey Professional Paper 109. 1919. #1:/Alaska/lek00043 ID. Leffingwell, E.K. 43 Aufeis in July. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00044 ID. Leffingwell, E.K. 44 Forks of Canning River. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00045 ID. Leffingwell, E.K. 45 Forks of Canning River. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska-Professional Paper 109/lek00046 ID. Leffingwell, E.K. 46 Forks of the Canning River. Aufeis covering the flood plain. July 1910. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. Plate 15-A, U.S. Geological Survey Professional Paper 109. 1919. #1:/Alaska-Professional Paper 109/lek00047 ID. Leffingwell, E.K. 47 A typical occurrence of the Sadlerochit sandstone, Ignek Valley. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1908. Figure 7, as a sketch, in U.S. Geological Survey. Professional Paper 109. 1919. #1:/Alaska/lek00048 ID. Leffingwell, E.K. 48 Sadleroechit Sandstone capping Lisburne Limestone, Canning River. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska-Professional Paper 109/lek00049 ID. Leffingwell, E.K. 49 Level-crested ridge several hundred feet below the summit level of the Arctic Mountains (Franklin Mountains) along the Canning River. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. Plate 25-A, U.S. Geological Survey Professional Paper 109. 1919. #1:/Alaska/lek00050 ID. Leffingwell, E.K. 50 Ikiakpuk and Ikiakpaurak Valleys, Canning River. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00051 ID. Leffingwell, E.K. 51 Looking west across the Canning River. Anaktuvak Plateau in distance. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00052 ID. Leffingwell, E.K. 52 Looking across the Canning River from Franklin Mountains. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska-Professional Paper 109/lek00053 ID. Leffingwell, E.K. 53 Relation of the Anatuvuk Plateau to the Arctic Mountains (Franklin Mountains). Anglo- American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. Plate 13-A, U.S. Geological Survey Professional Paper 109. 1919. #1:/Alaska/lek00054 ID. Leffingwell, E.K. 54 Northern front of Franklin Mountains, west of Canning River. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska-Professional Paper 109/lek00055 ID. Leffingwell, E.K. 55 Even sky line in the Franklin Mountains along the Canning River. Glaciated slopes in the foreground. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. Plate 24-A, U.S. Geological Survey Professional Paper 109. 1919. #1:/Alaska/lek00056 ID. Leffingwell, E.K. 56 Sledding up Canning River in April. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska-Professional Paper 109/lek00057 ID. Leffingwell, E.K. 57 Notch cut by lateral glacial drainage, Canning River, Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1908. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. Plate 15-B in U.S. Geological Survey. Professional Paper 109. 1919. #1:/Alaska-Professional Paper 109/lek00058 ID. Leffingwell, E.K. 58 Boulder on surface of Flaxman Island: Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1908. Figure 9, as a sketch, in U.S. Geological Survey. Professional Paper 109. 1919. #1:/Alaska-Professional Paper 109/lek00059 ID. Leffingwell, E.K. 59 Striated greenstone, Flaxman formation, pick for scale. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1908. Plate 16-B in U.S. Geological Survey. Professional Paper 109. 1919. #1:/Alaska/lek00060 ID. Leffingwell, E.K. 60 Striated bounders, Flaxman Formation, Arctic Coast, Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska-Professional Paper 109/lek00061 ID. Leffingwell, E.K. 61 Hanging glacier on Okpilak River. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1908. Plate 20-B in U.S. Geological Survey. Professional Paper 109. 1919. #1:/Alaska-Professional Paper 109/lek00062 ID. Leffingwell, E.K. 62 Small glacier near the head of the Okpilak River. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. Plate 20-A, U.S. Geological Survey Professional Paper 109. 1919. #1:/Alaska 109/lek00063 ID. Leffingwell, E.K. 63 Lower portion of Okpilak Glacier. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska-Professional Paper 109/lek0064e ID. Leffingwell, E.K. 64e Upper end of Okpilak Glacier. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. Plate 18-A, U.S. Geological Survey Professional Paper 109. 1919. #1:/Alaska-Professional Paper 109/lek0064f ID. Leffingwell, E.K. 64f Central part of Okpilak Glacier. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska.C. 1910. Plate 18-B, U.S. Geological Survey Professional Paper 109. 1919. #1:/Alaska-Professional Paper 109/lek00065 ID. Leffingwell, E.K. 65 Relation of the Anaktuvuk Plateau to the Arctic Mountains (Franklin Mountains) along the Hulahula River. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. Plate 13-B, U.S. Geological Survey Professional Paper 109. 1919. #1:/Alaska/lek00066 ID. Leffingwell, E.K. 66 Even crested Ridge overlying Hulahula River. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00067 ID. Leffingwell, E.K. 67 Northeast fork of Hulahula River. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00068 ID. Leffingwell, E.K. 68 North front of Franklin Mountains and Anaktuvuk Plateau, Hulahula River. Anglo- American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska-Professional Paper 109/lek00069 ID. Leffingwell, E.K. 69 Flat-topped area in the Franklin Mountains along the Hulahula River. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. Plate 24-B, U.S. Geological Survey Professional Paper 109. 1919. #1:/Alaska/lek00070 ID. Leffingwell, E.K. 70 Looking up Ignek Valley. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00071 ID. Leffingwell, E.K. 71 Looking up Ignek Valley. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska-Professional Paper 109/lek00072 ID. Leffingwell, E.K. 72 West shore of Flaxman Island, showing glacial boulders (Flaxman Formation) on the beach. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. Plate 16-A, U.S. Geological Survey Professional Paper 109. 1919. #1:/Alaska/lek00073 ID. Leffingwell, E.K. 73 Flaxman boulders along beach, Flaxman Island. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00074 ID. Leffingwell, E.K. 74 Boulder in situ, Flaxman Formation, Arctic Coast. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00075 ID. Leffingwell, E.K. 75 Base mud spots in tundra, solifluction, Arctic Coast. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska-Professional Paper 109/lek00076 ID. Leffingwell, E.K. 76 Inupiat Heritage Center, Alaska. Pond on Flaxman Island. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. Plate 27-A, U.S. Geological Survey Professional Paper 109. 1919. #1:/Alaska/lek00077 ID. Leffingwell, E.K. 77 Vegetation filling pond in tundra, Arctic Coast. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska-Professional Paper 109/lek00078 ID. Leffingwell, E.K. 78 Shallow pond on Flaxman Island being filled with vegetation. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska C. 1910. Plate 27-B, U.S. Geological Survey Professional Paper 109. 1919. #1:/Alaska/lek00079 ID. Leffingwell, E.K. 79 Vegetation filling shallow pond, Arctic Coast. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00080 ID. Leffingwell, E.K. 80 Cache and Eagle Creeks, Shublik Mountains. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00081 ID. Leffingwell, E.K. 81 North front of Shublik Mountains. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00082 ID. Leffingwell, E.K. 82 North front of Shublik Mountains, Alaska. Driving snow obscures the base of the mountains. Note level tuffed spurs below summit level of Endicott Plateau. Anglo- American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska-Professional Paper 109/lek0083a ID. Leffingwell, E.K. 83a Northern front of the Romanzof Mountains along the Okpilak River. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. Plate 12, U.S. Geological Survey Professional Paper 109. 1919. Photos lek0083a, lek0083b, lek0083c, lek0083d, and lek0083e form a panorama. #1:/Alaska-Professional Paper 109/lek0083b ID. Leffingwell, E.K. 83b Northern front of the Romanzof Mountains along the Okpilak River. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. Plate 12, U.S. Geological Survey Professional Paper 109. 1919. Photos lek0083a, lek0083b, lek0083c, lek0083d, and lek0083e form a panorama. #1:/Alaska-Professional Paper 109/lek0083c ID. Leffingwell, E.K. 83c Northern front of the Romanzof Mountains along the Okpilak River. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. Plate 12, U.S. Geological Survey Professional Paper 109. 1919. Photos lek0083a, lek0083b, lek0083c, lek0083d, and lek0083e form a panorama. #1:/Alaska-Professional Paper 109/lek0083d ID. Leffingwell, E.K. 83d Northern front of the Romanzof Mountains along the Okpilak River. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. Plate 12, U.S. Geological Survey Professional Paper 109. 1919. Photos lek0083a, lek0083b, lek0083c, lek0083d, and lek0083e form a panorama. #1:/Alaska-Professional Paper 109/lek0083e ID. Leffingwell, E.K. 83e Northern front of the Romanzof Mountains along the Okpilak River. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. Plate 12, U.S. Geological Survey Professional Paper 109. 1919. Photos lek0083a, lek0083b, lek0083c, lek0083d, and lek0083e form a panorama. #1:/Alaska-Professional Paper 109/lek00084 ID. Leffingwell, E.K. 84 Lower end of Okpilak Glacier. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. Plate 19-B, U.S. Geological Survey Professional Paper 109. 1919. #1:/Alaska/lek00085 ID. Leffingwell, E.K. 85 North front of Romanzof Mountains and Anaktuvuk Plateau, Okpliak River. Anglo- American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00086 ID. Leffingwell, E.K. 86 West fork of Okpliak River. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska-Professional Paper 109/lek00087 ID. Leffingwell, E.K. 87 West fork of the Okpilak River. Lower end of Okpilak Glacier in the distance. Anglo- American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. Plate 19-A, U.S. Geological Survey Professional Paper 109. 1919. #1:/Alaska/lek00088 ID. Leffingwell, E.K. 88 Headwaters of Okpliak River. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00089 ID. Leffingwell, E.K. 89 Looking up Okpliak River. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00090 ID. Leffingwell, E.K. 90 Relation of Anaktuvuk Plateau and Arctic Mountains, Okpliak River. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00091 ID. Leffingwell, E.K. 91 Camp along the Hulahula River. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00092 ID. Leffingwell, E.K. 92 Camp and northern front of the Anaktuvuk Plateau along the Canning River. Anglo- American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00093 ID. Leffingwell, E.K. 93 Eskimo trading camp on Flaxman Island. C. 1908. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. #1:/Alaska/lek00094 ID. Leffingwell, E.K. 94 Eskimo summer camp on Arey Island. Anglo-American Polar Expedition. Anglo- American Polar Expedition. Canning district, Northern Alaska region, Alaska. C.1908. #1:/Alaska/lek00095 ID. Leffingwell, E.K. 95 Eskimo summer camp on Arey Island. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1908. #1:/Alaska/lek00096 ID. Leffingwell, E.K. 96 Aigukuk (left), Okalishuk (right) on Arey Island. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C.1908. #1:/Alaska/lek00097 ID. Leffingwell, E.K. 97 Inupiat Heritage Center. Umiak near Barrow. Anglo-American Polar Expedition. Barrow district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00098 ID. Leffingwell, E.K. 98 Inupiat Heritage Center. Umiak near Barrow. Anglo-American Polar Expedition. Barrow district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00099 ID. Leffingwell, E.K. 99 Native children fishing, Canning River. Anglo-American Polar Expedition. Anglo- American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00100 ID. Leffingwell, E.K. 100 Native and dogs, Flaxman Island. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00101 ID. Leffingwell, E.K. 101 Shugavaichaik.. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1908 #1:/Alaska/lek00102 ID. Leffingwell, E.K. 102 Shugavaichaik and boys. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C.1908. #1:/Alaska-Professional Paper 109/lek00103 ID. Leffingwell, E.K. 103 Sheep hunters' camp among willows on the Canning River. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. Plate 14-B, U.S. Geological Survey Professional Paper 109. 1919. #1:/Alaska/lek00104 ID. Leffingwell, E.K. 104 Sheep hunters'camp on the Canning River. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00105 ID. Leffingwell, E.K. 105 Native camp along the Hulahula River. Glaciated slopes in the background. Anglo- American Polar Expedition. Canning district, Northern Alaska region, Alaska. C.1908 #1:/Alaska/lek00106 ID. Leffingwell, E.K. 106 Native camp on Arey Island. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1908. #1:/Alaska/lek00107 ID. Leffingwell, E.K. 107 Glaciated slopes, Hulahula River. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00108 ID. Leffingwell, E.K. 108 Inupiat Heritage Center, Alaska. Cutting up a whale near Barrow. Anglo-American Polar Expedition. Barrow district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00109 ID. Leffingwell, E.K. 109 Inupiat Heritage Center, Alaska. Cutting up a whale near Barrow. Anglo-American Polar Expedition. Barrow district, Northern Alaska region, Alaska. C. 1908. #1:/Alaska/lek00110 ID. Leffingwell, E.K. 110 Inupiat Heritage Center, Alaska. Cutting up a whale near Barrow. Anglo-American Polar Expedition. Barrow district, Northern Alaska region, Alaska. C. 1908. #1:/Alaska/lek00111 ID. Leffingwell, E.K. 111 Inupiat Heritage Center, Alaska. Cutting up a whale near Barrow. Anglo-American Polar Expedition. Barrow district, Northern Alaska region, Alaska. C. 1908. #1:/Alaska/lek00112 ID. Leffingwell, E.K. 112 Inupiat Heritage Center, Alaska. Cutting in a whale near Barrow. Anglo-American Polar Expedition. Barrow district, Northern Alaska region, Alaska. C. 1908. #1:/Alaska/lek00113 ID. Leffingwell, E.K. 113 Inupiat Heritage Center, Alaska. Dead whale near Barrow. Anglo-American Polar Expedition. Barrow district, Northern Alaska region, Alaska. C. 1908. #1:/Alaska/lek00114 ID. Leffingwell, E.K. 114 Coming home from whaling near Barrow. Anglo-American Polar Expedition. Anglo- American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1908. #1:/Alaska-Professional Paper 109/lek00115 ID. Leffingwell, E.K. 115 First arches of the framework of an Eskimo tent. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. Plate 7-A, U.S. Geological Survey Professional Paper 109. 1919. Photos lek00115, lek00116, lek00117, and lek00223 form a set. #1:/Alaska-Professional Paper 109/lek00116 ID. Leffingwell, E.K. 116 Second stage of the framework of an Eskimo tent. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. Plate 7-B, U.S. Geological Survey Professional Paper 109. 1919. Photos lek00115, lek00116, lek00117, and lek00223 form a set. #1:/Alaska-Professional Paper 109/lek00117 ID. Leffingwell, E.K. 117 Completed framework of an Eskimo tent. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. Plate 7-D, U.S. Geological Survey Professional Paper 109. 1919. Photos lek00115, lek00116, lek00117, and lek00223 form a set. #1:/Alaska-Professional Paper 109/lek00118 ID. Leffingwell, E.K. 118 Eskimo tent completed. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. Plate 8-B, U.S. Geological Survey Professional Paper 109. 1919 #1:/Alaska/lek00119 ID. Leffingwell, E.K. 119 Eskimo breaking camp, Arctic. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00120 ID. Leffingwell, E.K. 120 Breaking camp, Marsh Creek. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00121 ID. Leffingwell, E.K. 121 Breaking camp, Marsh Creek. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00122 ID. Leffingwell, E.K. 122 Drying gear, Duchess of Bedford, Port Clarence. Anglo-American Polar Expedition. Seward Peninsula region, Alaska. 1906. #1:/Canada/lek00123 ID. Leffingwell, E.K. 123 Duchess of Bedford, Victoria,.British Columbia, Canada. Anglo-American Polar Expedition. C.1906. #1:/Alaska/lek00124 ID. Leffingwell, E.K. 124 Inupiat Heritage Center, Alaska. Duchess of Bedford, in winter quarters Flaxman Island. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1906. #1:/Alaska/lek00125 ID. Leffingwell, E.K. 125 Duchess of Bedford, in winter quarters, Flaxman Island. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1906. #1:/Alaska/lek00126 ID. Leffingwell, E.K. 126 Duchess of Bedford, Arctic Ocean, Anglo-American Polar Expedition. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1906. #1:/Alaska/lek00127 ID. Leffingwell, E.K. 127 Duchess of Bedford in winter quarters, Flaxman Island, Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1906. #1:/Alaska/lek00128 ID. Leffingwell, E.K. 128 Yacht Argo in winter, Flaxman Island. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00129 ID. Leffingwell, E.K. 129 Yacht Argo near Barrow. Anglo-American Polar Expedition. Barrow district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00130 ID. Leffingwell, E.K. 130 Yacht Argo Arctic Ocean. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00131 ID. Leffingwell, E.K. 131 Yacht Argo Arctic Ocean. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Washington/lek00132 ID. Leffingwell, E.K. 132 Yacht Argo. Anglo-American Polar Expedition. Seattle, Washington. C. 1910. #1:/Alaska/lek00133 ID. Leffingwell, E.K. 133 "Shooting the Sun", observing for latitude. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00134 ID. Leffingwell, E.K. 134 Improvised raft going to beach after boats lost in gale, Flaxman Island, Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00135 ID. Leffingwell, E.K. 135 Making tea, Hulahula River. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00136 ID. Leffingwell, E.K. 136 A stop for lunch, Hulahula River. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00137 ID. Leffingwell, E.K. 137 Eating lunch, coastal plain Okpilak River. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00138 ID. Leffingwell, E.K. 138 Okpilak River and coastal plain. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00139 ID. Leffingwell, E.K. 139 Okpilak River and coastal plain. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00140 ID. Leffingwell, E.K. 140 Packing up Okpilak River. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00141 ID. Leffingwell, E.K. 141 A warm day in May, Beaufort Sea. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00142 ID. Leffingwell, E.K. 142 Sledding across an old pressure ridge in northern Arctic Ocean. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00143 ID. Leffingwell, E.K. 143 Rough ice covered with soft snow, Arctic Ocean. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00144 ID. Leffingwell, E.K. 144 No caption, similar to photographs nos. lek00163, lek00229, lek00238. Yacht Argo in winter quarters at Leffingwell's first house, Flaxman Island. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska-Professional Paper 109/lek00145 ID. Leffingwell, E.K. 145 Provision rack on Flaxman Island. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. Plate 6-B, U.S. Geological Survey Professional Paper 109. 1919. #1:/Alaska/lek00146 ID. Leffingwell, E.K. 146 Provision rack on Flaxman Island buried in snow. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00147 ID. Leffingwell, E.K. 147 Camp windbreak made of snow blocks and sled cover along the Canning River. Anglo- American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska-Professional Paper 109/lek00148 ID. Leffingwell, E.K. 148 Icing the runner of a sled. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. Plate 8-A, U.S. Geological Survey Professional Paper 109. 1919. #1:/Alaska-Professional Paper 109/lek00149 ID. Leffingwell, E.K. 149 Moving camp. Dogs with pack saddles. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. Plate 9-B, U.S. Geological, Survey Professional Paper 109. 1919. #1:/Alaska/lek00150 ID. Leffingwell, E.K. 150 Drying camp gear in sun Arctic Ocean. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00151 ID. Leffingwell, E.K. 151 Tent after heavy gale, Arctic Ocean. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00152 ID. Leffingwell, E.K. 152 Camp after heavy gale, Arctic Ocean. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00153 ID. Leffingwell, E.K. 153 Camp at foot of high ridge of old ice, Arctic Ocean. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00154 ID. Leffingwell, E.K. 154 Inupiat Heritage Center, Alaska. Drying camp gear in the sun near the Arctic Ocean. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00155 ID. Leffingwell, E.K. 155 Drying camp gear, Arctic Ocean. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00156 ID. Leffingwell, E.K. 156 Captain Ejnar Mikkelsen, Flaxman Island. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. 1907. #1:/Alaska/lek00157 ID. Leffingwell, E.K. 157 Ernest deKoven Leffingwell near an abandoned igloo along the Canning River. Anglo- American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00158 ID. Leffingwell, E.K. 158 Ernest deKoven Leffingwell, in cabin, Flaxman Island. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00159 ID. Leffingwell, E.K. 159 Ernest deKoven Leffingwell and dogs on Flaxman Island. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00160 ID. Leffingwell, E.K. 160 Leffingwell's, first house, Flaxman Island. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00161 ID. Leffingwell, E.K. 161 Winter quarters of Ernest deKoven Leffingwell, Flaxman Island. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00162 ID. Leffingwell, E.K. 162 Leffingwell's, house, Flaxman Island. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00163 ID. Leffingwell, E.K. 163 Leffingwell's, first house, Flaxman Island. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00164 ID. Leffingwell, E.K. 164 Camp June, Canning River. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00165 ID. Leffingwell, E.K. 165 Camp June, Canning River. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00166 ID. Leffingwell, E.K. 166 On board Duchess of Bedford near Teller. Left to right, Ernest deKoven Leffingwell, Mikktelsen, Dr. G. P. Howe, Ditlesen. Anglo-American Polar Expedition. Seward Peninsula region, Alaska. 1906. #1:/Alaska/lek00167 ID. Leffingwell, E.K. 167 Spring travel along coast of Arctic, Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00168 ID. Leffingwell, E.K. 168 Dogs on ice near Barrow. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00169 ID. Leffingwell, E.K. 169 Coastal Plain southwest of Point Barrow. Anglo-American Polar Expedition. Barrow district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00170 ID. Leffingwell, E.K. 170 Dogs fallen into crack, Arctic Ocean. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00171 ID. Leffingwell, E.K. 171 Eskimo dog, Arctic Ocean. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00172 ID. Leffingwell, E.K. 172 Inupiat Heritage Center, Alaska. Dogs on ice near Point Barrow, Alaska. Coastal Plain in distance. Anglo-American Polar Expedition. Barrow district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00173 ID. Leffingwell, E.K. 173 White fox in trap. Arctic. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00174 ID. Leffingwell, E.K. 174 Mountain streams soaking down through snow in spring. Anglo-American Polar Expedition Canning River. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00175 ID. Leffingwell, E.K. 175 West side of Lake Peters with Mount Chamberlin showing. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00176 ID. Leffingwell, E.K. 176 West end of Outside Range of Arctic Mountains between Sadlerochit and Canning rivers. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00177 ID. Leffingwell, E.K. 177 Inupiat Heritage Center, Alaska. Eskimo umiak in ice near Barrow. Anglo-American Polar Expedition Barrow district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00178 ID. Leffingwell, E.K. 178 Inupiat Heritage Center, Alaska. Gathering Guillemots with canvas boat. Bering Sea. Anglo-American Polar Expedition Barrow district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00179 ID. Leffingwell, E.K. 179 Inupiat Heritage Center, Alaska. Summer travel through water on ice with skin canoe on sled. Anglo-American Polar Expedition. Barrow district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00180 ID. Leffingwell, E.K. 180 Duchess of Bedford. Bearing Sea. Storke Storkersen. Anglo-American Polar Expedition Barrow district, Northern Alaska region, Alaska. C. 1906. #1:/Canada/lek00181 ID. Leffingwell, E.K. 181 Duchess of Bedford. At Victoria, British Columbia, Canada. Anglo-American Polar Expedition. C. 1906. #1:/Alaska/lek00182 ID. Leffingwell, E.K. 182 Duchess of Bedford. Weaving fishing net. Anglo-American Polar Expedition. Barrow district, Northern Alaska region, Alaska. C. 1906. #1:/Alaska/lek00183 ID. Leffingwell, E.K. 183 Inupiat Heritage Center, Alaska. Revenue Cutter Thetis. Anglo-American Polar Expedition. Barrow district, Northern Alaska region, Alaska. 1906. #1:/Alaska/lek00184 ID. Leffingwell, E.K. 184 Inupiat Heritage Center, Alaska. Gjoa, Amundsen's boat at Barrow. Anglo-American Polar Expedition. Barrow district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00185 ID. Leffingwell, E.K. 185 Inupiat Heritage Center, Alaska. Whaleship in Arctic Ocean. Anglo-American Polar Expedition. Barrow district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00186 ID. Leffingwell, E.K. 186 Inupiat Heritage Center, Alaska. Whale ship in Arctic Ocean. Anglo-American Polar Expedition. Barrow district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00187 ID. Leffingwell, E.K. 187 Inupiat Heritage Center, Alaska. Mary Sachs at Peard Bay. Anglo-American Polar Expedition. Barrow district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00188 ID. Leffingwell, E.K. 188 Inupiat Heritage Center, Alaska. Mary Sachs at Peard Bay. Anglo-American Polar Expedition. Barrow district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00189 ID. Leffingwell, E.K. 189 Inupiat Heritage Center, Alaska. Mary Sachs near Barrow, Peard Bay. Anglo-American Polar Expedition. Barrow district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00190 ID. Leffingwell, E.K. 190 Inupiat Heritage Center, Alaska. Mary Sachs in Peard Bay. Anglo-American Polar Expedition. Barrow district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00191 ID. Leffingwell, E.K. 191 Duchess of Bedford at Flaxman Island. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1906. #1:/Alaska/lek00192 ID. Leffingwell, E.K. 192 Duchess of Bedford after dismantling. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. 1907. #1:/Alaska/lek00193 ID. Leffingwell, E.K. 193 Storker Teodor Storkersen left, Enjar Mikkelsen and sailor on Duchess of Bedford. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1906. #1:/Canada/lek00194 ID. Leffingwell, E.K. 194 Duchess of Bedford at Victoria, British Columbia, Canada. Anglo-American Polar Expedition C. 1906. #1:/Canada/lek00195 ID. Leffingwell, E.K. 195 Duchess of Bedford at Victoria, British Columbia, Canada. Anglo-American Polar Expedition. C 1906. #1:/Canada/lek00196 ID. Leffingwell, E.K. 196 Duchess of Bedford at Victoria, British Columbia, Canada. Anglo-American Polar Expedition. C 1906. #1:/Canada/lek00197 ID. Leffingwell, E.K. 197 Duchess of Bedford at Port Clarence. Anglo-American Polar Expedition. Seward Peninsula region, Alaska. C. 1906. #1:/Alaska/lek00198 ID. Leffingwell, E.K. 198 Eskimo dance at Flaxman Island. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00199 ID. Leffingwell, E.K. 199 Shagavaichiak and his boys. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00200 ID. Leffingwell, E.K. 200 Natives cutting in a Bowhead whale at Barrow. Anglo-American Polar Expedition. Barrow district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00201 ID. Leffingwell, E.K. 201 Natives at Flaxman Island. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00202 ID. Leffingwell, E.K. 202 Natives at Flaxman Island. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00203 ID. Leffingwell, E.K. 203 Natives at Flaxman Island. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00205 ID. Leffingwell, E.K. 205 Natives at Flaxman Island. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00206 ID. Leffingwell, E.K. 206 Natives at Flaxman Island. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00207 ID. Leffingwell, E.K. 207 Days catch of fish through ice on Canning River. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00208 ID. Leffingwell, E.K. 208 Native with sled. Wind carved snow. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00209 ID. Leffingwell, E.K. 209 Okalisuk and puyuk (dog). Anglo-American Polar Expedition.district, Canning Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00210 ID. Leffingwell, E.K. 210 Traveling through floodwater, Canning River. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska-Professional Paper 109/lek00211 ID. Leffingwell, E.K. 211 Dogs with pack saddles. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. Plate 9-A, U.S. Geological Survey Professional Paper 109. 1919. #1:/Alaska/lek00212 ID. Leffingwell, E.K. 212 Dogs at Flaxman Island. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00213 ID. Leffingwell, E.K. 213 Umiak (dog). Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00214 ID. Leffingwell, E.K. 214 Old Dad (dog). Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1906. #1:/Alaska/lek00215 ID. Leffingwell, E.K. 215 Capitan Ejnar Mikkelsen and Umiak (dog). Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1906. #1:/Alaska/lek00216 ID. Leffingwell, E.K. 216 White fox in trap. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska-Professional Paper 109/lek00217 ID. Leffingwell, E.K. 217 Coastal plain southwest of Point Barrow, showing a high bank in Peard Bay. Anglo- American Polar Expedition. Barrow district, Northern Alaska region, Alaska. C. 1910. Plate 14-A, U.S. Geological Survey Professional Paper 109. 1919. #1:/Alaska/lek00218 ID. Leffingwell, E.K. 218 Native camp at Shublik, Canning River. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00219 ID. Leffingwell, E.K. 219 Dismantling camp at Marsh Creek. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00220 ID. Leffingwell, E.K. 220 Dismantling camp at Marsh Creek. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00221 ID. Leffingwell, E.K. 221 Dismantling camp at Marsh Creek. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00222 ID. Leffingwell, E.K. 222 Dismantling camp at Marsh Creek. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska-Professional Paper 109/lek00223 ID. Leffingwell, E.K. 223 Third stage of the framework of an Eskimo tent. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. Plate 7-C, U.S. Geological Survey Professional Paper 109. 1919. Photos lek00115, lek00116, lek00117, and lek00223 form a set. #1:/Alaska/lek00224 ID. Leffingwell, E.K. 224 Summer camp at Marsh Creek back of Collinson Point. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00225 ID. Leffingwell, E.K. 225 Camp of snow blocks and sled cover, used in emergency. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00226 ID. Leffingwell, E.K. 226 Ready to move camp. Sadlerochit River. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00227 ID. Leffingwell, E.K. 227 Camping in boat in summer. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00228 ID. Leffingwell, E.K. 228 Summer camp on sand spit near Flaxman Island. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00229 ID. Leffingwell, E.K. 229 First camp at Flaxman Island. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00230 ID. Leffingwell, E.K. 230 Provision rack at Flaxman Island. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska-Professional Paper 109/lek00231 ID. Leffingwell, E.K. 231 Dwelling house and sheds on Flaxman Island. Anglo-American Polar Expedition. . Canning district, Northern Alaska region, Alaska. C. 1910. Plate 6-A, U.S. Geological Survey Professional Paper 109. 1919. #1:/Alaska/lek00232 ID. Leffingwell, E.K. 232 House at Flaxman Island in summer. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00233 ID. Leffingwell, E.K. 233 Sleds near Flaxman Island. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00234 ID. Leffingwell, E.K. 234 Provision rack at Flaxman Island. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00235 ID. Leffingwell, E.K. 235 House at Flaxman Island. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00236 ID. Leffingwell, E.K. 236 Feeding pups at Flaxman Island. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00237 ID. Leffingwell, E.K. 237 Pete Bernard feeding his dogs at Collinson Point. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00238 ID. Leffingwell, E.K. 238 First hut at Flaxman Island snowed under. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00239 ID. Leffingwell, E.K. 239 Tent after gale (corner of film froze while damp). Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00240 ID. Leffingwell, E.K. 240 Ernest deKoven Leffingwell (left), Captain Ejnar Mikkelsen (center) Dr. G. P. Howe (right). Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1906. #1:/Alaska/lek00241 ID. Leffingwell, E.K. 241 Ernest deKoven Leffingwell and pack dog at abandoned hut on Canning River. Anglo- American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00242 ID. Leffingwell, E.K. 242 Captain Ejnar Mikkelsen at the expedition's astronomical observatory on Flaxman Island. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1906. #1:/Alaska/lek00243 ID. Leffingwell, E.K. 243 Ernest deKoven Leffingwell in a cabin on Flaxman Island. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00244 ID. Leffingwell, E.K. 244 Leffingwell, E.K. 244 Ernest deKoven Leffingwell (left) Captain Ejnar Mikkelsen Dr. G. P. Howe, Ditlevsen. Staff of Duchess of Bedford. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1906. #1:/Alaska/lek00245 ID. Leffingwell, E.K. 245 Near Icy Cape crew of Duchess of Bedford with polar bear. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1906. #1:/Alaska/lek00246 ID. Leffingwell, E.K. 246 Dan Sweeney and Shagavaichiak. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00247 ID. Leffingwell, E.K. 247 Dan Sweeney. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00248 ID. Leffingwell, E.K. 248 Pete Bernard of Steffansson's boat, Mary Sachs. He froze in the "The Friendly" Arctic. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00249 ID. Leffingwell, E.K. 249 Johannesen of Gjoa, Roald Ammundsen's boat at Barrow. Anglo-American Polar Expedition. Barrow district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00250 ID. Leffingwell, E.K. 250 Ditlevsen, Kodiak Island. Anglo-American Polar Expedition. Barrow district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00251 ID. Leffingwell, E.K. 251 Storker Teodor Storkersen. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00252 ID. Leffingwell, E.K. 252 Dr. G. P. Howe at Flaxman Island. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00253 ID. Leffingwell, E.K. 253 Ernest deKoven Leffingwell at Astronomical Observatory Flaxman Island. Anglo- American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00254 ID. Leffingwell, E.K. 254 Triangulation signal erected over Astronomical Observatory Pier at Flaxman Island. Used from KUG Station 20 miles inland. It looks eccentric but was lined up O.K. for KUG. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00255 ID. Leffingwell, E.K. 255 Feasting on Snow Goose eggs near Point Tangent. Anglo-American Polar Expedition Barrow district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00256 ID. Leffingwell, E.K. 256 Inupiat Heritage Center, Alaska. Skinning Dalls Sheep heads for National Museum. Anglo-American Polar Expedition Barrow district, Northern Alaska region, Alaska. C. 1907. #1:/Alaska-Professional Paper 109/lek00257 ID. Leffingwell, E.K. 257 Erosion of a polygon field near the 141st meridian. C. 1910. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. Plate 30-B, U.S. Geological Survey Professional Paper 109. 1919. #1:/Canada/lek00258 ID. Leffingwell, E.K. 258 Duchess of Bedford at Victoria, British Columbia, Canada. Anglo-American Polar Expedition 1906. #1:/Canada/lek00259 ID. Leffingwell, E.K. 259 Duchess of Bedford at Victoria, British Columbia, Canada. Anglo-American Polar Expedition 1906. #1:/Alaska/lek00260 ID. Leffingwell, E.K. 260 Mary Sachs at Peard Bay. Anglo-American Polar Expedition Barrow district, Northern Alaska region, Alaska. C. 1910. #1:/Alaska/lek00261 ID. Leffingwell, E.K. 261 House at Flaxman Island in summer. Anglo-American Polar Expedition. Canning district, Northern Alaska region, Alaska. C. 1910. #1:/Colorado-Bulletin 707/cmr01096 ID. Campbell, M.R. 1096 Massive walls of the Royal Gorge, up the canyon from the train near the old station of Gorge. The water pipe to Canon City tunnels through the projecting point on the left. Fremont County, Colorado. C. 1915. Plate 36-A in U.S. Geological Survey. Bulletin 707. 1922. #1:/Colorado-Bulletin 707/cmr01109 ID. Campbell, M.R. 1109 Grand canyon of the Arkansas River below Texas Creek, the canyon in many places is very rough and rugged, the massive granite projecting from the walls on either side seems almost to bar the pathway of the river and these spurs are crowned with crags and pinnacles. Fremont County, Colorado. C. 1915. Plate 40-A in U.S. Geological Survey. Bulletin 707. 1922. #1:/Colorado-Bulletin 707/cmr01110 ID. Campbell, M.R. 1110 Tunnel on Rainbow Highway, the construction of the highway involved engineering difficulties as great as those which beset the railroad engineers in 1881. Much rock cutting was done and even tunnels were driven through projecting points of massive granite. Fremont County, Colorado. C. 1915. Plate 40-B in U.S. Geological Survey. Bulletin 707. 1922. #1:/Colorado-Bulletin 707/cmr01113 ID. Campbell, M.R. 1113 Grand canyon of the Arkansas River, projecting point on the south wall above Cotopaxi and the new Rainbow Highway at the base of the cliff. Fremont County, Colorado. C. 1915. Plate 36-C in U.S. Geological Survey. Bulletin 707. 1922. #1:/Colorado-Bulletin 707/cmr01117 ID. Campbell, M.R. 1117 Potholes in granite boulders in Brown Canyon there are many large granite boulders around which in ordinary stages the water swirls and boils but which in floods are completely submerged. The rushing current rolls round and round small boulders caught in hollows of the larger blocks, cutting great circular pits called "potholes". Chaffee County, Colorado. C. 1915. Plate 47-B in U.S. Geological Survey. Bulletin 707. 1922. #1:/Colorado-Bulletin 707/cmr01122 ID. Campbell, M.R. 1122 Natural granite monument, this striking remnant of massive granite at the upper end of Wildhorse Canyon stands to the right of the tracks and is at least 60 feet high. The granite is cut by dikes of other material, which show in the picture. Rio Blanco County, Colorado. C. 1915. Plate 47-A in U.S. Geological Survey. Bulletin 707. 1922. #1:/Colorado-Bulletin 707/cmr01131 ID. Campbell, M.R. 1131 Recent volcano in Eagle Valley, from the dark hill in the middle background came the last volcanic outburst in this part of the country. Fragments of dark lava still cling to the slopes, showing that the lava flowed down to the bottom of the valley. Eagle County, Colorado. C. 1915. Plate 56-B in U.S. Geological Survey. Bulletin 707. 1922. #1:/Colorado-Bulletin 707/cmr01153 ID. Campbell, M.R. 1153 Black Canyon of The Gunnison National Park, Colorado. Rough water: When seen from the rim of the canyon Gunnison River appears like a placid brook, but a nearer view dispels the idea. C. 1915. Plate 71-C in U.S. Geological Survey. Bulletin 707. 1922. #1:/Colorado-Bulletin 707/cmr01157 ID. Campbell, M.R. 1157 Overhanging walls of Ruby Canyon, the massive red sandstone makes very imposing walls in the canyon. It nearly overhangs the track. Mesa County, Colorado. C. 1915. Plate 80-A in U.S. Geological Survey. Bulletin 707. 1922. #1:/Utah-Bulletin 707/cmr01161 ID. Campbell, M.R. 1161 The boundary line between Colorado and Utah is well marked in Ruby Canyon. Juab County, Utah. C. 1915. Plate 80-C in U.S. Geological Survey. Bulletin 707. 1922. #1:/Colorado-Bulletin 707/cmr01169 ID. Campbell, M.R. 1169 Nature's lacelike sculpture, fine sculpturing by the rain on a butte of red and white clay on the right of the track 2 miles south of DeBeque, every part of the surface is thoroughly drained and each rivulet has carved for itself a distinct channel. Mesa County, Colorado. C. 1915. Plate 65-A in U.S. Geological Survey. Bulletin 707. 1922. #1:/Colorado-Bulletin 707/cmr01174 ID. Campbell, M.R. 1174 Palisade Canyon at Cameo, the walls of the canyon back of Cameo are about 1,500 feet high and are composed of sandstone and shale of the Mesaverde formation. These weather into castle-like cliff and slopes, as shown in the view. Mesa County, Colorado. C. 1915. Plate 65-B in U.S. Geological Survey. Bulletin 707. 1922. #1:/Utah-Bulletin 707/cfr00026 ID. Clark, F.R. 26 Band of sheep, one of the important industries in this part of Utah is sheep rising. The bands of sheep each band under the guidance of a herder or two, range from low grounds of the desert in the winter and early spring to the highest ridges and plateaus in midsummer. Utah. 1914. Plate 86-A in U.S. Geological Survey. Bulletin 707. 1922. #1:/Utah-Bulletin 707/cfr00046 ID. Clark, F.R. 46 Coke ovens at Sunnyside, the Sunnyside mine of the Utah Fuel Co. is not on the main line of the railroad, but it is served by branch which connects at Mounds. The coal mined at Sunnyside is the only coal in the State that will make commercial coke. Carbon County, Utah. 1914. Plate 86-B in U.S. Geological Survey. Bulletin 707. 1922. #1:/Utah-Bulletin 707/cfr00112 ID. Clark, F.R. 112 Thick coal bed, old prospect entry on 15 foot coal bed near Helper, these thick beds of good coal will doubtless be greatly developed. Carbon County, Utah. 1914. Plate 80-B in U.S. Geological Survey. Bulletin 707. 1922. #1:/Utah-Bulletin 707/cfr00115 ID. Clark, F.R. 115 Cliffs above Helper, the cliffs of sandstone underlain by shale are striking features as the traveler looks up at them from Helper, but when seen from the top they are equally interesting, for one can follow with the eye, the various beds and note the form of sculpture of each particular layer. Carbon County, Utah. 1914. Plate 86-C in U.S. Geological Survey. Bulletin 707. 1922. #1:/Utah-Bulletin 707/ccw00809 ID. Cross, C.W. 809 Plateau near Moab, some of the wonderful towers and wall may be seen on the left from the railroad. There are no curves in the landscape only straight lines and angles. Some of the valleys hidden in these rugged plateaus are very beautiful but difficult of access. Grand County, Utah. June 5, 1905. Plate 82-A in U.S. Geological Survey. Bulletin 707. 1922. #1:/Colorado-Bulletin 707/ccw01097 ID. Cross, C.W. 1097 Marshall Pass, viewed from the hills on the south. This pass was discovered in 1873, by Lt. William L. Marshall. Its striking feature is the lack of ruggedness that characterizes many of the other passes through the Rocky Mountains. Saguache County, Colorado. July 23, 1905. Plate 69-A in U.S. Geological Survey. Bulletin 707. #1:/South Dakota-Bulletin 691/dnh00393 ID. Darton, N.H. 393 Outcrop of chalk of Niobrara formation in southwestern part of Shannon County, South Dakota. C.1897. Plate 2 in U.S. Geological Survey. Bulletin 691. 1919. #1:/Utah-Bulletin 691/dca00007 ID. Davis, C.A. 7 Fossil vegetable matter of oil shale of Green River formation: right, fern annulus, magnified 685 diameters. Utah. 1914. Plate 9-C (right) in U.S. Geological Survey. Bulletin 691. #1:/Utah-Bulletin 691/dca00019 ID. Davis, C.A. 19 Fossil vegetable matter of oil shale of Green River formation. Utah. 1914. Plate 8-A in U.S. Geological Survey. Bulletin 691. 1919. #1:/Utah-Bulletin 691/dca00060 ID. Davis, C.A. 60 Fossil vegetable matter of oil shale of Green River formation: left, yellow-green algae magnified 740 diameters. Utah. 1914. Plate 9-B (left) in U.S. Geological Survey. Bulletin 691. 1919. #1:/Utah-Bulletin 691/dca00110 ID. Davis, C.A. 110 Fossil vegetable matter of oil shale of Green River formation: left, spores magnified 200 diameters. Utah. 1914. Plate 9-C (left) in U.S. Geological Survey. Bulletin 691. 1919. #1:/Montana-Bulletin 691/het00275 ID. Hancock, E.T. 275 Looking southeast from point of Eagle sandstone near the northeast corner of sec. 9, T. 3 N., R. 20 E. Stillwater County, Montana. 1916. Plate 21-A in U.S. Geological Survey. Bulletin 691. 1919. #1:/Montana-Bulletin 691/het00276 ID. Hancock, E.T. 276 Northward sloping hillside where fault cuts through the Eagle, Clagett, and Judith River sandstones into Hailstone basin, Stillwater County, Montana. 1916. Plate 21-B in U.S. Geological Survey. Bulletin 691. 1919. #1:/Montana-Bulletin 691/het00282 ID. Hancock, E.T. 282 Sandstone at top of ridge in Bearpaw shale near section line between Secs. 33 and 34, T. 2 N. R. 21 E. Stillwater County, Montana. 1916. Plate 20-A in U.S. Geological Survey. Bulletin 691. 1919. #1:/Montana-Bulletin 691/het00283 ID. Hancock, E.T. 283 Basal portion of ridge forming sandstone in Bearpaw shale middle of sec. 35, T. 2 N., R.21 E. Stillwater County, Montana. 1916. Plate 20-B in U.S. Geological Survey. Bulletin 691. 1919. #1:/Montana-Bulletin 691/het00293 ID. Hancock, E.T. 293 False-bedded Eagle sandstone cut off by a fault in the SE ¬ Sec. 23, T. 3 N., R. 22 E. Yellowstone County, Montana. 1916. Plate 19-A in U.S. Geological Survey. Bulletin 691. 1919. #1:/Montana-Bulletin 691/het00296 ID. Hancock, E.T. 296 Small thrust fault in Eagle sandstone in the SE ¬ Sec. 18, T.3 N., R. 23 E. Yellowstone County, Montana. 1916. Plate 22-A in U.S. Geological Survey. Bulletin 691. 1919. #1:/Montana-Bulletin 691/het00306 ID. Hancock, E.T. 306 Fault in southwest corner of sec. 7, T. 2 N., R. 24 E. Yellowstone County, Montana. 1916. Plate 22-B in U.S. Geological Survey. Bulletin 691. 1919. #1:/Montana-Bulletin 691/het00312 ID. Hancock, E.T. 312 The Judith River formation as it is exposed in the very much dissected area 1.5 miles south of Acton. Yellowstone County, Montana. 1916. Plate 19-B in U.S. Geological Survey. Bulletin 691. 1919. #1:/Montana-Bulletin 691/het00319 ID. Hancock, E.T. 319 Faulted anticline of Eagle sandstone, looking southeast from a point on the sandstone in the Bearpaw shale in the northwest corner of sec. 16, T. 2 N., R. 25 E. Yellowstone County, Montana. 1916. Plate 23 in U.S. Geological Survey. Bulletin 691. 1919. #1:/Colorado-Bulletin 691/hob00035 ID. Hopkins, O.B. 35 North end of Weber Mountain, the lower slope of Menefee Mountain. Montezuma County, Colorado. 1914. Plate 35-C in U.S. Geological Survey. Bulletin 691. 1919. #1:/Colorado-Bulletin 691/hob00051 ID. Hopkins, O.B. 51 Mesa Verde National Park, Colorado. Cliff House sandstone and Spruce Tree House. 1914. Plate 36-B in U.S. Geological Survey. Bulletin 691. 1919. #1:/Colorado-Bulletin 691/hob00057 ID. Hopkins, O.B. 57 Up Weber Canyon from its junction with Mancos Canyon. Montezuma County, Colorado. 1914. Plate 35-A in U.S. Geological Survey. Bulletin 691. 1919. #1:/Colorado-Bulletin 691/hob00059 ID. Hopkins, O.B. 59 Down Mancos Canyon, from Waters ranch, at the junction of Weber and Mancos Canyons. Montezuma County, Colorado. 1914. Plate 35-B in U.S. Geological Survey. Bulletin 691. 1919. #1:/Colorado-Bulletin 707/hjf00394 ID. Hunter, J.F. 394 Sheep in the Gunnison country, many sheep are pastured in the country. In midsummer they reach the higher slopes of the mountains as shown in this view. Rio Grande County, Colorado. August 1915. Plate 70-C in U.S. Geological Survey. Bulletin 707. 1922. #1:/Utah-Bulletin 707/lwt00253 ID. Lee, W.T. 253 An Earth erosion column in a semi-arid country ordinary earth becomes almost as enduring as solid rock. These columns are 30 feet high and are protected by caps from the rain. Grand County, Utah. 1907. Plate 50-C in U.S. Geological Survey. Bulletin 707. 1922. #1:/Colorado-Bulletin 707/lwt00261 ID. Lee, W.T. 261 Canyon between Delta and Grand Junction, general view looking upstream, the rocks dip to the left, away from the Uncompahgre Plateau or arch. The shaly rocks in the top of the canyon walls are of maroon color and the massive sandstone at the base is brick red. Delta County, Colorado 1907. Plate 76-A in U.S. Geological Survey. Bulletin 707. 1922. #1:/Colorado-Bulletin 707/lwt00293 ID. Lee, W.T. 293 Intricate erosion of volcanic rock, this mass of volcanic tuff is dissected by rain erosion that consists of numberless spires and pinnacles. It makes picturesque cliffs that are hard to climb. Similar sheets of tuff cover the hills on both sides of Gunnison Valley. Mesa County, Colorado. 1907. Plate 70-B in U.S. Geological Survey. Bulletin 707. 1922. #1:/Colorado-Bulletin 707/lwt00297 ID. Lee, W.T. 297 Spires of volcanic rock near Sapinero, much of this country was once covered with volcanic tuff consisting of fragments of lava of all sizes, which is bedded like shale or clay. It is soft and is readily cut by rain and streams into beautiful and fantastic forms. Gunnison County, Colorado. 1907. Plate 70-A in U.S. Geological Survey. Bulletin 707. 1922. #1:/Colorado-Bulletin 707/lwt00300 ID. Lee, W.T. 300 Black Canyon of The Gunnison National Park, Colorado. Seen from above from the automobile road that follows the brink of the canyon for several miles. This canyon is a close rival of the Royal Gorge and like it may easily be seen from both top and bottom. These pictures show the even surface of the plateau in which the canyon is cut. 1907. Plate 71-B in U.S. Geological Survey. Bulletin 707. 1922. #1:/Colorado-Bulletin 707/lwt00302 ID. Lee, W.T. 302 Black Canyon of The Gunnison National Park, Colorado. 1906? Seen from above from the automobile road that follows the brink of the canyon for several miles. This canyon is a close rival of the Royal Gorge and like it may easily be seen from both top and bottom. These pictures show the even surface of the plateau in which the canyon is cut. 1907. Plate 71-A in U.S. Geological Survey. Bulletin 707. 1922. #1:/Colorado-Bulletin 707/lmo00350 ID. Leighton, M.O. 350 Eagle valley near Edwards, although most of valley of Eagle Valley between Minturn and Walcott is more than 7,000 feet above sea level, good crops of alfalfa, more hardy grains and potatoes are raised. The ranch buildings are usually substantial and the ranches well kept. In the soft light of the evening the fields of waving grain make a very pretty picture. Eagle County, Colorado. C. 1910. Plate 56-A in U.S. Geological Survey. Bulletin 707. 1922. #1:/Colorado-Bulletin 707/lmo00369 ID. Leighton, M.O. 369 Edge of lava flow, flowed out from the volcano in Campbell 1131, until it reached the river, there it stopped. This view of the edge of the flow where it is washed by Eagle River. Eagle County, Colorado. C. 1910. Plate 56-C in U.S. Geological Survey. Bulletin 707. 1922. #1:/Arkansas-Bulletin 690/mhd00149 ID. Miser, H.D. 149 Pike gravel member at Bluff ford on Muddy Fork, 1 mile west Nathan. The feet of the man in the picture are level with the contact of the gravel with steeply dipping Carboniferous sandstone which is exposed in the bed Muddy Fork in the foreground. Note the cross-bedding. Pike County, Arkansas. 1916. Plate 2 in U.S. Geological Survey. Bulletin 690. 1919. #1:/Arkansas-Bulletin 690/mhd00204 ID. Miser, H.D. 204 Pebbles from gravel bed at base of Tokio and member of Bingen formation. The pebbles, which are 1.5 to 5.25 inches in diameter, show the usual shape of selected novaculite pebbles to be expected at most localities in the Caddo Gap and De Queen quadrangles. Pike County, Arkansas. 1916. Plate 3 in U.S. Geological Survey. Bulletin 690. 1919. #1:/Colorado-Bulletin 707/winc0304 ID. Winchester, D.E. 304 Inclined normal fault displaced 8 or 10 feet. As the surface is not offset by the fault the movement must have taken place long before the present valley was cut. Rio Blanco County, Colorado. 1914. Plate 87-A in U.S. Geological Survey. Bulletin 707. 1922. #1:/Utah-Bulletin 691/winc0395 ID. Winchester, D.E. 395 Asphaltic sandstone near Watson. Uintah County, Utah. 1916. Plate 5-A in U.S. Geological Survey. Bulletin 691. 1919. #1:/Utah-Bulletin 691/winc0396 ID. Winchester, D.E. 396 Gilsonite vein below oil shale near Watson. Uintah County, Utah. 1916. Plate 6-B in U.S. Geological Survey. Bulletin 691. 1919. #1:/Utah-Bulletin 691/winc0409 ID. Winchester, D.E. 409 Concretionary sandstone, Uintah County, Utah. 1916. Plate 5-B in U.S. Geological Survey. Bulletin 691. 1919. #1:/Utah-Bulletin 691/winc0415 ID. Winchester, D.E. 415 Desolation Canyon of Green River, Uintah County, Utah. 1916. Plate 6-A in U.S. Geological Survey. Bulletin 691. 1919. #1:/Utah-Bulletin 691/winc0434 ID. Winchester, D.E. 434 Green River formation on north side of Argyle Canyon, oil shale bed is dark band near middle. Carbon County, Utah. 1916. Plate 7-A in U.S. Geological Survey. Bulletin 691. 1919. #1:/Utah-Bulletin 691/winc0435 ID. Winchester, D.E. 435 Green River formation on north side of Argyle Canyon, oil shale bed is dark band near middle. Carbon County, Utah. 1916. Plate 7-A in U.S. Geological Survey. Bulletin 691. 1919. #1:/Utah-Bulletin 691/winc0436 ID. Winchester, D.E. 436 Green River formation on north side of Argyle Canyon, oil shale bed is dark band near middle. Carbon County, Utah. 1916. Plate 7-A in U.S. Geological Survey. Bulletin 691. 1919. #1:/Colorado-Bulletin 691/winc0437 ID. Winchester, D.E. 437 Green River formation on west side of Parachute Creek, cliff is largely rich oil shale. Garfield County, Colorado. 1916. Plate 7-B in U.S. Geological Survey. Bulletin 691. 1919. #1:/Colorado-Bulletin 691/winc0438 ID. Winchester, D.E. 438 Green River formation on west side of Parachute Creek, cliff is largely rich oil shale. Garfield County, Colorado. 1916. Plate 7-B in U.S. Geological Survey. Bulletin 691. 1919. #1:/Colorado-Bulletin 691/winc0439 ID. Winchester, D.E. 439 Green River formation on west side of Parachute Creek, cliff is largely rich oil shale. Garfield County, Colorado. 1916. Plate 7-B in U.S. Geological Survey. Bulletin 691. 1919. #1:/Minnesota-Bulletin 689/miscel06 ID. Miscellaneous 6 International Boundary Marks; the mark farthest north (no. 925) on the Lake of the Woods meridian boundary. Lake of the Woods County, Minnesota. 1912. Plate 1-A in U.S. Geological Survey. Bulletin 689. 1923. #1:/Maryland-Bulletin 689/miscel07 ID. Miscellaneous 7 Typical boundary marks, old and new; monument No. 20 on Mason and Dixon Line. Washington County, Maryland. 1912. Plate 5-A in U.S. Geological Survey. Bulletin 689. 1923. #1:/Utah-Bulletin 689/miscel08 ID. Miscellaneous 8 State Line Butte on Utah-Arizona line. 1912. Plate 6-B in U.S. Geological Survey. Bulletin 689. 1923. #1:/Kentucky-Bulletin 688/sew01915 ID. Shaw, E.W. 1915 Sink holes of three kinds: Broad, shallow undrained sink hole characteristic of surface underlain by Ste. Genevieve limestone, Scottsville-Bowling Green Pike. Allen County, Kentucky. 1917. Plate 6-A in U.S. Geological Survey. Bulletin 688. 1919. #1:/Kentucky-Bulletin 688/sew01916 ID. Shaw, E.W. 1916 Sink holes of three kinds: Open throated sink hole in St. Louis limestone, Scottsville- Bowling Green Pike, 8 miles west of Scottsville. Allen County, Kentucky. 1917. Plate 6- C in U.S. Geological Survey. Bulletin 688. 1919. #1:/Kentucky-Bulletin 688/sew01918 ID. Shaw, E.W. 1918 Structural features developed through erosion and slumping and of no value in finding oil: St. Louis limestone exposure with two pseudo-anticlines near wells showing a little gas, on Scottsville-Bowling Green Pike at crossing of Drake Creek. Allen County, Kentucky. 1917. Plate 9-A in U.S. Geological Survey. Bulletin 688. 1919. #1:/Kentucky-Bulletin 688/sew01919 ID. Shaw, E.W. 1919 Geodes weathering out of Warsaw limestone near halfway on Scottsville-Bowling Green Pike. Allen County, Kentucky. 1917. Plate 5-A in U.S. Geological Survey. Bulletin 688. 1919. #1:/Kentucky-Bulletin 688/sew01920 ID. Shaw, E.W. 1920 Sink holes of three kinds: Deep steep-sided undrained sink hole characteristic of surface underlain by St. Louis limestone, Scottsville-Bowling Green Pike, 11 miles west of Scottsville. Allen County, Kentucky. 1917. Plate 6-B in U.S. Geological Survey. Bulletin 688. 1919. #1:/Kentucky-Bulletin 688/sew01921 ID. Shaw, E.W. 1921 Local unconformity in St. Louis limestone (?) on Scottsville-Bowling Green Pike, about 15 miles west of Scottsville; above the unconformity is very pure oolitic cross-bedded limestones, below cherty limestone. Allen County, Kentucky. 1917. Plate 5-B in U.S. Geological Survey. Bulletin 688. 1919. #1:/Kentucky-Bulletin 688/sew01922 ID. Shaw, E.W. 1922 Structural features developed through erosion and slumping and of no value in finding oil: near view of one of the pseudo-anticlines in Shaw 1923. Allen County, Kentucky. 1917. Plate 9-C in U.S. Geological Survey. Bulletin 688. 1919. #1:/Kentucky-Bulletin 688/sew01923 ID. Shaw, E.W. 1923 Structural features developed through erosion and slumping and of no value in finding oil: Pseudo-anticlines, synclines, and faults in uppermost part of Black Chattanooga shale and overlying beds outcropping on east valley side of Long Creek near Holland. Allen County, Kentucky. 1917. Plate 9-B in U.S. Geological Survey. Bulletin 688. 1919. #1:/Kentucky-Bulletin 688/sew01934 ID. Shaw, E.W. 1934 Original structural features of little or no value in oil and gas findings, exposed in railway cut 1 mile south of Petroleum. Shows cross bedding on large scale and strong unconformities resulting almost certainly from submarine erosion. The attitude of other strata in the vicinity shows that the lower beds have not been tilted but are approximately in the attitude in which they were deposited. Photo by K.F. Mather. Allen County, Kentucky. 1917. Plate 4-B in U.S. Geological Survey. Bulletin 688. 1919. #1:/Kentucky-Bulletin 688/sew01939 ID. Shaw, E.W. 1939 Exposures of "corniferous" limestone, the oil "sand" of many Kentucky oil fields. Detail from Long Creek exposure showing pits. Photo by K.F. Mather. Allen County, Kentucky. 1917. Plate 3-C in U.S. Geological Survey. Bulletin 688. 1919. #1:/Kentucky-Bulletin 688/sew01940 ID. Shaw, E.W. 1940 Exposures of "corniferous" limestone, the oil "sand" of many Kentucky oil fields. Exposure on Long Creek 1.5 miles north of Holland, showing common tendency of limestone to weather to a deeply pitted surface. Photo by K.F. Mather. Allen County, Kentucky. 1917. Plate 3-B in U.S. Geological Survey. Bulletin 688. 1919. #1:/Kentucky-Bulletin 688/sew01941 ID. Shaw, E.W. 1941 Original structural features of little or no value in oil and gas findings, exposed in railway cut 1 mile south of Petroleum. Shows cross bedding on large scale and strong unconformities resulting almost certainly from submarine erosion. The attitude of other strata in the vicinity shows that the lower beds have not been tilted but are approximately in the attitude in which they were deposited. Photo by K.F. Mather. Allen County, Kentucky. 1917. Plate 4-A in U.S. Geological Survey. Bulletin 688. 1919. #1:/Kentucky-Bulletin 688/sew01942 ID. Shaw, E.W. 1942 Original structural features of little or no value in oil and gas findings, exposed in railway cut 1 mile south of Petroleum. Shows cross bedding on large scale and strong unconformities resulting almost certainly from submarine erosion. The attitude of other strata in the vicinity shows that the lower beds have not. been tilted but are approximately in the attitude in which they were deposited. Note thickening of upper beds away from unconformity Photo by K.F. Mather. Allen County, Kentucky. 1917. Plate 4-C in U.S. Geological Survey. Bulletin 688. 1919. #1:/Kentucky-Bulletin 688/sew01947 ID. Shaw, E.W. 1947 Exposures of "corniferous" limestone, the oil "sand" of many Kentucky oil fields Exposure on Big Trammel Creek, 6.5 miles south of Scottsville. Photo by K.F. Mather. Allen County, Kentucky. 1917. Plate 3-A in U.S. Geological Survey. Bulletin 688. 1919. #1:/New Mexico/dut00001 ID. Dutton, C.E. 1 Probably a volcanic neck five miles northeast of Juantafoya. Mount Taylor Quadrangle, Sandoval County, New Mexico. Circa 1877. #1:/New Mexico-Sixth Annual Report/dut00002 ID. Dutton, C.E. 2 Neck near Juantafoya. Sandoval County, New Mexico. Circa1877. Figure 17, in U.S. Geological Survey Sixth Annual Report, 1885. #1:/New Mexico/dut00003 ID. Dutton, C.E. 3 Neck near Juantafoya. Sandoval County, New Mexico. Circa1877. #1:/New Mexico-Sixth Annual Report/dut00004 ID. Dutton, C.E. 4 Neck six miles northeast of Juantafoya. Mount Taylor Quadrangle, Sandoval County, New Mexico. Circa 1877. Figure 19, in U.S. Geological Survey Sixth Annual Report, 1885. #1:/New Mexico-Sixth Annual Report/dut00005 ID. Dutton, C.E. 5 Panorama from the edge of the Mount Taylor Mesa. Mount Taylor Quadrangle, McKinkley Co., New Mexico. Circa 1877. Plate 20, in U.S. Geological Survey Sixth Annual Report, 1885. #1:/New Mexico-Sixth Annual Report/dut00006 ID. Dutton, C.E. 6 Columnar structure in volcanic neck five miles northeast of Juantafoya. Mount Taylor Quadrangle, Sandoval County, New Mexico. Circa 1877. Figure 18 and enlarged portion of Plate 22, in U.S. Geological Survey Sixth Annual Report, 1885. #1:/New Mexico-Sixth Annual Report/dut00007 ID. Dutton, C.E. 7 A group of necks among the Cretaceous beds north of Mount Taylor Mesa and southwest of Cabazon. Mount Taylor Quadrangle, Sandoval County, New Mexico. Circa 1877. Figure 22, in U.S. Geological Survey Sixth Annual Report, 1885. #1:/New Mexico-Sixth Annual Report/dut00008 ID. Dutton, C.E. 8 Panorama in valley of the Puerco. Mount Taylor Quadrangle, Sandoval County, New Mexico. Circa 1877. Plate 21 in U.S. Geological Survey Sixth Annual Report, 1885. #1:/New Mexico/dut00009 ID. Dutton, C.E. 9 Great neck, eight miles south of Salazar. This is the finest one in the district with the exception of Cabazon. Mount Taylor Quadrangle, Sandoval County, New Mexico. Circa 1877. #1:/New Mexico-Sixth Annual Report/dut00010 ID. Dutton, C.E. 10 Great neck, eight miles south of Salazar. This is the finest one in the district with the exception of Cabazon. Mount Taylor Quadrangle, Sandoval County, New Mexico. Circa 1877. Figure 20, in U.S. Geological Survey Sixth Annual Report 1885. #1:/New Mexico-Sixth Annual Report/dut00011 ID. Dutton, C.E. 11 Two large necks, the more distant being that of the Cabazon. Cretaceous mesas in the foreground. Mount Taylor Quadrangle, Sandoval County, New Mexico. Circa 1877. Figure 21, in U.S. Geological Survey Sixth Annual Report, 1885. #1:/New Mexico-Sixth Annual Report/dut00012 ID. Dutton, C.E. 12 Buttes and mesas of the Middle Cretaceous. Mount Taylor Quadrangle, Valencia County, New Mexico. Circa 1877. Figure 4, in U.S. Geological Survey Sixth Annual Report, 1885. #1:/New Mexico-Sixth Annual Report/dut00013 ID. Dutton, C.E. 13 Alesna (The Bodkin) in the northwest side and near base of the Mount Taylor Mesa. It is beautifully columnar. Mount Taylor Quadrangle, McKinley County, New Mexico. Circa 1877. Figure 23, in U.S. Geological Survey Sixth Annual Report, 1885. #1:/New Mexico/dut00014 ID. Dutton, C.E. 14 Upper Jurassic Zuni Sandstone capped by Cretaceous northeast of Gallup. Wingate Quadrangle, McKinley County, New Mexico. Circa 1877. #1:/New Mexico-Sixth Annual Report/dut00015 ID. Dutton, C.E. 15 Zuni Sandstones consisting of the upper members of the Jura-Trias System. New Mexico Circa 1877. Figure 3, in U.S. Geological Survey Sixth Annual Report, 1885. #1:/New Mexico-Sixth Annual Report/dut00016 ID. Dutton, C.E. 16 Toyalani, a butte composed of the upper members of the Jura-Trias System, as seen from the housetops of Zuni. Wingate Quadrangle, Valencia County, New Mexico. Circa 1877. Figure 10, in U.S. Geological Survey Sixth Annual Report, 1885. #1:/New Mexico-Sixth Annual Report/dut00017 ID. Dutton, C.E. 17 The monocline at Nutria. The summit of the hills is nearly vertical outcrop of Dakota Sandstone, The right slope is the edge of the Zuni Sandstone and the left slope is the edge of the shaly beds overlying the Dakota Sandstone. Wingate Quadrangle, Valencia County, New Mexico. Circa 1877. Figure 6, in U.S. Geological Survey Sixth Annual Report, 1885. #1:/New Mexico-Sixth Annual Report/dut00018 ID. Dutton, C.E. 18 Pyrmaid Butte near Fort Wingate with promontories of Wingate Sandstone in front. The butte is composed of the Zuni sandstones. Wingate Quadrangle, McKinley County, New Mexico. Circa 1877. Figure 11, in U.S. Geological Survey Sixth Annual Report, 1885. #1:/New Mexico/dut00019 ID. Dutton, C.E. 19 Navajo church, northwest of Fort Wingate. Wingate Quadrangle, McKinley County, New Mexico. Circa 1877. #1:/New Mexico/dut00020 ID. Dutton, C.E. 20 Nutria Monocline at Mineral Spring, west side. On the left end of the picture the horizontal beds of the Cretaceous are shown, and on the right end beds inclined at an angle of 55ø. The horizontal members are seen upon the ground to abut against the inclined members. Wingate Quadrangle, McKinley County, New Mexico. Circa 1877. #1:/New Mexico/dut00021 ID. Dutton, C.E. 21 Pyramid Peak of Zuni and Wingate sandstone. Wingate Quadrangle, McKinley County, New Mexico. Circa 1877. #1:/New Mexico/dut00022 ID. Dutton, C.E. 22 Pyramid Peak of Zuni and Wingate sandstone. Wingate Quadrangle, McKinley County, New Mexico. Circa 1877. #1:/New Mexico-Sixth Annual Report/dut00023 ID. Dutton, C.E. 23 Eroded towers capped with large blocks of sandstone, which had fallen from the Dakota Sandstone nearly 1000 feet above. The protection which these blocks afforded to the softer calcareous sandstone on which they lay caused gradual formation of columns by slow dissolution of the surrounding rock. New Mexico. Circa 1877. Figure 13, in U.S. Geological Survey Sixth Annual Report, 1885. #1:/New Mexico/dut00024 ID. Dutton, C.E. 24 Wingate Sandstone bluffs north of Fort Wingate. Wingate Quadrangle, McKinley County, New Mexico. Circa 1877. #1:/New Mexico-Sixth Annual Report/dut00025 ID. Dutton, C.E. 25 Wingate Sandstone with many beds and partings. New Mexico. Circa 877. Figure 2, in U.S. Geological Survey Sixth Annual Report, 1885. #1:/New Mexico-Sixth Annual Report/dut00026 ID. Dutton, C.E. 26 The Nutria Monocline at Mineral Springs, east side. Showing the inclined beds curving back to horizontality. Wingate Quadrangle, McKinley County, New Mexico. Circa 1877. Figure 9, in U.S. Geological Survey Sixth Annual Report, 1885. #1:/Utah-Monograph 2/dut0027a ID. Dutton, C.E. 27a Looking up the valley of the Virgen. This illustration is from a sketch by W. H. Holmes The strata across the river showing pale belted colors are the lower Permian. Beyond them on the right and in the background is the Smithsonian Butte, composed of Triassic strata. The great Temples and Towers are not visible. Chrome lithograph by Sinclair, Grand Canyon District. Circa 1877. Plate 1, in U.S. Geological Survey Monograph 2, 1882 and as Figure 103 in U.S. Geological Survey Professional Paper 220, 1950. #1:/Utah-Monograph 2/dut0027b ID. Dutton, C.E. 27b Looking up the valley of the Virgen. This illustration is from a sketch by W. H. Holmes The strata across the river showing pale belted colors are the lower Permian. Beyond them on the right and in the background is the Smithsonian Butte, composed of Triassic strata. The great Temples and Towers are not visible. Chrome lithograph by Sinclair, Grand Canyon District. Circa 1877. Frontispiece, in U.S. Geological Survey Monograph 2, 1882 and as Figure 103 in U.S. Geological Survey Professional Paper 220, 1950. #1:/Utah-Monograph 2/dut00028 ID. Dutton, C.E. 28 The Jurassic terrace on the Colob. The curious forms are due in great part to the cross- bedding of the Jurassic white sandstone. In the distance are the summits of the Temples of Virgen. Drawn from a photograph by Thomas Moran. Wood Cut. Grand Canyon District, Utah. Circa 1877. Plate 9, in U.S. Geological Survey Monograph 2, 1882. #1:/Utah-Second Annual Report/dut00029 ID. Dutton, C.E. 29 Land of the Standing Rocks. Showing the characters of the Permian buttes in the heart of the Plateau country. The scene here represented is near the junction of the Grand and Green Rivers. Drawn from a photograph by W.H. Holmes. Wood-cut. Grand Canyon District, Coconino County, Arizona. Circa 1877. Plate 22, in U.S. Geological Survey Annual Report No. 2, 1880-1881. 1882, and Plate 11 U.S. Geological Survey Monograph 2, 1882. #1:/Utah-Second Annual Report/dut00030 ID. Dutton, C.E. 30 Towers at Short Creek. Showing the buttressed and columnar aspect of the Vermillion Cliffs as we approach the Valley of the Virgen from the southeast. The cliffs rise about 1800 feet above the plain. The columnar portion is the great sandstone bed of the upper Trias. Drawn by W. H. Holmes. Photo-engraving. Grand Canyon District. Washington County, Utah. Circa 1877. Plate 19, in U.S. Geological Survey Annual Report No. 2, 1880-1881. 1882, and Plate 13 U.S. Geological Survey Monograph 2, 1882. #1:/Arizona-Monograph 2/dut00031 ID. Dutton, C.E. 31 A pinnacled gable of the Toroweap. Drawn by W. H. Holmes. Wood-cut. Grand Canyon District, Arizona . Circa 1877. Plate 16, in U.S. Geological Survey Monograph 2, 1882. #1:/Arizona-Monograph 2/dut00032 ID. Dutton, C.E. 32 The Inner Gorge. Lava falls in the Grand Canon. From a photograph. Drawn by Thomas Moran. Wood-cut. Grand Canyon District, Coconino County, Arizona . Circa 1877. Plate 19, in U.S. Geological Survey Monograph 2, 1882. #1:/Arizona-Monograph 2/dut00033 ID. Dutton, C.E. 33 Mount Trumbull from Mount Logan. Mount Trumbull consists of Permian Strata, heavily capped by basalt of considerable antiquity, probably early Pliocene. Upon the right flank of the mountain is a knob, which is a much more recent basaltic cinder cone, sending heavy streams of lava to the plain below. Drawn by W. H. Holmes. Wood-cut. Grand Canyon District, Mohave /County, Arizona . Circa 1877. Plate 20, in U.S. Geological Survey Monograph 2, 1882. #1:/Arizona-Monograph 2/dut00034 ID. Dutton, C.E. 34 Recent lava flow on the Uinkaret. This basalt field appears to be extremely recent, and the lava looks as fresh as the eruptions which have come from Vesuvius within the last twenty or thirty years. Drawn by W. H. Holmes. Wood-cut. Grand Canyon District, Mohave County, Arizona . Circa 1877. Plate 21, in U.S. Geological Survey Monograph 2, 1882. #1:/Utah-Monograph 2/dut0035a ID. Dutton, C.E. 35a Sunset on the Kanab Desert. From the brink of the Permian Cliff - a Permian butte in the foreground, the Vermillion Cliffs in the distance, and the Jurassic white sandstone in the extreme background. Drawn by W. H. Holmes. Chromo-lithographed by Sinclair. Grand Canyon District, Mohave County, Arizona . Circa 1877. Plate 23, in U.S. Geological Survey Monograph 2, 1882. #1:/Utah-Monograph 2/dut0035b ID. Dutton, C.E. 35b Sunset on the Kanab Desert. From the brink of the Permian Cliff - a Permian butte in the foreground, the Vermillion Cliffs in the distance, and the Jurassic white sandstone in the extreme background. Drawn by W. H. Holmes. Chromo-lithographed by Sinclair. Grand Canyon District, Mohave County, Arizona . Circa 1877. Plate 23, in U.S. Geological Survey Monograph 2, 1882. #1:/Arizona-Monograph 2/dut00036 ID. Dutton, C.E. 36 Kanab Canon. The pinnacle or tower is in the Red Wall Limestone, and is about 780 feet high. Drawn by Thomas Moran. Wood-cut. Grand Canyon District, Arizona . Circa 1877. Plate 24, in U.S. Geological Survey Monograph 2, 1882. #1:/Arizona-Second Annual Report/dut00037 ID. Dutton, C.E. 37 Kanab Canon, near the junction of Kanab Creek with the Colorado River. About 2800 feet of wall is shown here, the upper portion being the Red Wall. The Upper walls (Aubrey) are not disclosed. The depth of Kaneb Canon here is about 4700 feet. Drawn by Thomas Moran. Wood-cut. Grand Canyon District, Arizona . Circa 1877. Plate 29, in U.S. Geological Survey Second Annual Report, 1880-1881. 1882. Plate 25 in U.S. Geological Survey Monograph 2, 1882. #1:/Oklahoma-Oil Field/fae00001 ID. Fath, A.E. 1 Glenn Pool Oil Field, looking east and southeast from th SE1/4 SEC 8, T17N., R12E. Panorama in tree parts. Photo 1, 2, and 3. Creek County, Oklahoma. August 22, 1914. #1:/Oklahoma-Oil Field/fae00002 ID. Fath, A.E. 2 Glenn Pool Oil Field, looking east and southeast from th SE1/4 SEC 8, T17N., R12E. Panorama in tree parts. Photo 1, 2, and 3. Creek County, Oklahoma. August 22, 1914. #1:/Fossil/fae00023 ID. Fath, A.E. 23 Fossil Tree Stump. Found on March 14, 1914 at a depth of 40 feet while sinking shaft #9 of the Rock Island Coal Co. at Alderson, Oklahoma. Exhibited at Rock Island Depot, El Reno, Oklahoma. Canadian County, Oklahoma. July 15, 1915. #1:/Oklahoma-Oil Field/fae00027 ID. Fath, A.E. 27 Oil tank fire in Scott Pool, south of Kellville, Okla. aken from top of rise in road at west side of NW1/4 SEC 35 T 17E., R 10 E. 1 1/2 milles from fire. Circa 1915. #1:/Oklahoma-Oil Field/fae00028 ID. Fath, A.E. 28 Oil tank fire in Scott Pool, south of Kellville, Okla. aken from top of rise in road at west side of NW1/4 SEC 35 T 17E., R 10 E. 3/4 milles from fire. Circa 1915. #1:/Oklahoma-Oil Field/fae00039 ID. Fath, A.E. 39 Wild gas well spraying salt water water in Shamrock Pool of the Cushing Oil Field, Okla. Creek Couny, Okla. Sept 26, 1915. #1:/Oklahoma-Oil Field/fae00040 ID. Fath, A.E. 40 Cushing Oil Field, south of Oilton, Oklahoma. Creek Couny, Oklahoma. Oct 3, 1915. #1:/Oklahoma-Oil Field/fae00049 ID. Fath, A.E. 49 Cimmarron River bed operations in Cushing Oil Field., Oklahoma., Looking Southwest. Creek Couny, Oklahoma. December 2, 1915. Panorama in two parts. Photos 49 and 50. #1:/Oklahoma-Oil Field/fae00050 ID. Fath, A.E. 50 Cimmarron River bed operations in Cushing Oil Field., Oklahoma., Looking Southwest. Creek Couny, Oklahoma. December 2, 1915. Panorama in two parts. Photos 49 and 50. #1:/Oklahoma-Faulting/fae00061 ID. Fath, A.E. 61 Veined character of sheared sandstone caused by faulting. NW 1/4 SEC 29, T 15 W., R 8 E., Bristow Quadrangle., Creek County, Oklahoma. Circa 1915. #1:/Oklahoma-Faulting/fae00062 ID. Fath, A.E. 62 Veined character of sheared sandstone caused by faulting. North Central part of SEC 5, T 16 N., R 8 E., Bristow Quadrangle., Creek County, Oklahoma. Circa 1915. #1:/Kansas-Oil Field/fae00074 ID. Fath, A.E. 74 Panorma looking north across SEC 10 and 11-26-4. Toward a distance of the El Dorado Oil Field. SEC 10 is to the left of the road at the left wide. SEC 11 is the right of the road at the left side. The nearby well at the right edge is in the NW corner of SEC 14. Bulter County, Kansas. Circa 1915. #1:/New Mexico-Bulletin 716/bcm00202 ID. Bauer, C.M. 202 Part of the Mesaverde group in the gap cut through the great hogback by Chaco River. San Juan County, New Mexico. 1916. Plate 19-A in U.S. Geological Survey. Bulletin 716. 1920. #1:/New Mexico-Bulletin 716/bcm00228 ID. Bauer, C.M. 228 Part of the Fruitland formation near Hunter's Store, in T. 24 N., R. 13 W. San Juan County, New Mexico. 1916. Plate 21 in U.S. Geological Survey. Bulletin 716. 1920. #1:/New Mexico-Bulletin 716/bcm00230 ID. Bauer, C.M. 230 Characteristic weathering of variable sandstone of the Fruitland formation, Meyers Creek. San Juan County, New Mexico. 1916. Plate 20-B in U.S. Geological Survey. Bulletin 716. 1920. #1:/Kansas-Bulletin 697/bef00511 ID. Burchard, E.F. 511 Rock gypsum quarry of American Cement Plaster Co. at Watonga. Blaine County, Oklahoma. Circa 1916. Plate 26-B in U.S. Geological Survey. Bulletin 697. 1920. #1:/Kansas-Bulletin 697/bef00615 ID. Burchard, E.F. 615 Gypsum bed in Best Bros. quarry, Kling. Barber County, Kansas. Circa 1916. Plate 18-A in U.S. Geological Survey. Bulletin 697. 1920. #1:/Kansas-Bulletin 697/bef00710 ID. Burchard, E.F. 710 Gypsum quarry and loading platform of Aerial Tramway. Gypsum. Baker County, Oregon. Circa 1916. Plate 29-A in U.S. Geological Survey. Bulletin 697. 1920. #1:/Wyoming-Bulletin 697/bef00748 ID. Burchard, E.F. 748 Method of mining gypsite, Laramie. Albany County, Wyoming. Circa 1916. Plate 37-B in U.S. Geological Survey. Bulletin 697. 1920. #1:/Utah-Bulletin 711/cfr0057b ID. Clark, F.R. 57b Structure and character of McElmo formation in Farnham anticline. Carbon County, Utah. 1914. Plate 2-A in U.S. Geological Survey. Bulletin 711. 1920. #1:/Utah-Bulletin 711/cfr00061 ID. Clark, F.R. 61 Farnham fault cutting Ferron sandstone member of Mancos shale and Dakota sandstone. Carbon County, Utah. 1914. Plate 2-B in U.S. Geological Survey. Bulletin 711. 1920. #1:/Wyoming-Bulletin 711/caj00742 ID. Collier, A.J. 742 The Embar group and Chugwater and Sundance formations from a point 6 miles south of the Warm Springs Domes, near Thermopolis. Hot Springs County, Wyoming. 1918. Plate 7-A in U.S. Geological Survey. Bulletin 711. 1920. #1:/Wyoming-Bulletin 711/caj00745 ID. Collier, A.J. 745 Showing the structure of the Warm Springs Domes near Thermopolis; location of the Carter wells. Hot Springs County, Wyoming. 1918. Plate 7-B in U.S. Geological Survey. Bulletin 711. 1920. #1:/New Mexico-Bulletin697/dnh01232 ID. Darton, N.H. 1232 Three gypsum beds in Hell Canyon, 20 miles southwest of Custer. Custer County, South Dakota. 1901. Plate 20-A in U.S. Geological Survey. Bulletin 697. 1920. #1:/New Mexico-Bulletin697/dnh01310 ID. Darton, N.H. 1310 Gypsum capping Cerro Blanco, 1 mile northwest of Plaza of Gallina, looking north. Lincoln County, New Mexico. 1916. Plate 20-A in U.S. Geological Survey. Bulletin 697. 1920. Plate 38-A in U.S. Geological Survey. Bulletin 794. 1928. #1:/New Mexico-Bulletin697/dnh01484 ID. Darton, N.H. 1484 Gypsum in north wall of Rincon Colorado, east of Pedernal Peak, looking northeast. Torrance County, New Mexico. 1916. Plate 20-A in U.S. Geological Survey. Bulletin 697. 1920. Plate 55-C in U.S. Geological Survey. Bulletin 794. 1928. #1:/Montana-Bulletin 711/het00354 ID. Hancock, E.T. 354 Pompeys Pillar, a low butte formed by the sandstone at the base of the Lance formation. It is near the south bank of the Yellowstone, about 2.5 miles west of the station by the same name on the Northern Pacific Railway. Yellowstone County, Montana. 1917. Plate 18 in U.S. Geological Survey. Bulletin 711. 1920. #1:/Montana-Bulletin 711/het00361 ID. Hancock, E.T. 361 Eagle sandstone as seen looking northwest from top of the steep cliff in the NE ¬ sec. 19, T. 1 S., R. 27 E. Yellowstone County, Montana. 1917. Plate 16 in U.S. Geological Survey. Bulletin 711. 1920. Plate 9-A in U.S. Geological Survey. Bulletin 856. 1935. #1:/Montana-Bulletin 711/het00362 ID. Hancock, E.T. 362 Vertical cliff about 100 feet high formed by the massive sandstone at the base of the Eagle formation near the north line of Sec. 19, T. 1 S., R. 27 E. Yellowstone County, Montana. 1917. Plate 17-A in U.S. Geological Survey. Bulletin 711. 1920. #1:/Montana-Bulletin 711/het00363 ID. Hancock, E.T. 363 Massive sandstone at the base of the Eagle formation showing a natural bridge of sandstone where the two men are sitting, an opening has been eroded through the sandstone back of the natural bridge, and a very large pine tree has grown up through the small opening since it was formed. Yellowstone County, Montana. 1917. Plate 17-B in U.S. Geological Survey. Bulletin 711. 1920. #1:/Wyoming-Bulletin 716/het00380 ID. Hancock, E.T. 380 Sandstone including large reddish-brown concretions near the top of the Fox Hills sandstone east side of Buck Creek valley sec. 33, T. 37 N., R. 63 W. looking northward. The tree covered ridge at the top is developed in part, on the same sandstone dipping westward on the opposite of the valley. Niobrara County, Wyoming. 1918. Plate 12-B in U.S. Geological Survey. Bulletin 716. 1920. #1:/Wyoming-Bulletin 716/het00381 ID. Hancock, E.T. 381 Sandstone including large reddish-brown concretions near the top of the Fox Hills sandstone east side of Buck Creek valley sec. 33, T. 37 N., R. 63 W. showing results of weathering. Niobrara County, Wyoming. 1918. Plate 12-A in U.S. Geological Survey. Bulletin 716. 1920. #1:/Wyoming-Bulletin 716/het00396 ID. Hancock, E.T. 396 Discharge of oil into a dammed up gulch at the Ohio Oil Co.'s discovery well in the NW ¬ sec. 36, T.36 N., R. 65 W. Lance Creek field. Niobrara County, Wyoming. 1918. Plate 13-B in U.S. Geological Survey. Bulletin 716. 1920. #1:/Wyoming-Bulletin 716/het00397 ID. Hancock, E.T. 397 Discharge of oil into a dammed up gulch at the Ohio Oil Co.'s discovery well in the NW ¬ sec. 36, T.36 N., R. 65 W. Lance Creek field. Niobrara County, Wyoming. 1918. Plate 13-A in U.S. Geological Survey. Bulletin 716. 1920. #1:/Colorado-Bulletin 697/lwt01060 ID. Lee, W.T. 1060 Gypsum quarry in Lyons formation. Loveland, Larimer County, Colorado. 1916. Plate 14-A in U.S. Geological Survey. Bulletin 697. 1920. #1:/Utah-Bulletin 697/lct00192 ID. Lupton, C.T. 192 Gypsum bed in Horn Silver Gulch, south east of Ferron: C.T. Lupton examining a specimen. Emery County, Utah. 1911. Plate 34-B in U.S. Geological Survey. Bulletin 697. 1920. #1:/Idaho-Bulletin 713/mgr00165 ID. Mansfield, M.R. 165 Cedar tree in vigorous condition growing prostrate because of exposure to high winds. The tree is one of group of similar trees on a high ridge in the NE ¬ sec. 25, T. 9 S., R. 32 E. Bingham County, Idaho. 1913. Plate 2-B in U.S. Geological Survey. Bulletin 713. 1920. #1:/Idaho-Bulletin 713/mgr00167 ID. Mansfield, M.R. 167 Exposure and wind sculpture of volcanic on Starlight Creek, T. 8 S. R. 33 E. Power County, Idaho. 1913. Plate 11-B in U.S. Geological Survey. Bulletin 713. 1920. #1:/Idaho-Bulletin 713/mgr00180 ID. Mansfield, M.R. 180 Panoramic view west through the Narrows of Ross Fork Canyon, part of the course of the Putnam overthrust is shown, together with some of the Cambrian and Ordovician formations. The upper slopes show the topography of the Putnam cycle. The canyon around little knoll (left center) represents the Gibson cycle. Caribou County, Idaho. 1913. Plate 1-C in U.S. Geological Survey. Bulletin 713. 1920. #1:/Idaho-Bulletin 713/mgr00181 ID. Mansfield, M.R. 181 Panoramic view west through the Narrows of Ross Fork Canyon, part of the course of the Putnam overthrust is shown, together with some of the Cambrian and Ordovician formations. The upper slopes show the topography of the Putnam cycle. The canyon around little knoll (left center) represents the Gibson cycle. Caribou County, Idaho. 1913. Plate 1-C in U.S. Geological Survey. Bulletin 713. 1920. #1:/Idaho-Bulletin 713/mgr00182 ID. Mansfield, M.R. 182 Panoramic view west through the Narrows of Ross Fork Canyon, part of the course of the Putnam overthrust is shown, together with some of the Cambrian and Ordovician formations. The upper slopes show the topography of the Putnam cycle. The canyon around little knoll (left center) represents the Gibson cycle. Caribou County, Idaho. 1913. Plate 1-C in U.S. Geological Survey. Bulletin 713. 1920. #1:/Idaho-Bulletin 713/mgr00183 ID. Mansfield, M.R. 183 Panoramic view west through the Narrows of Ross Fork Canyon, part of the course of the Putnam overthrust is shown, together with some of the Cambrian and Ordovician formations. The upper slopes show the topography of the Putnam cycle. The canyon around little knoll (left center) represents the Gibson cycle. Caribou County, Idaho. 1913. Plate 1-C in U.S. Geological Survey. Bulletin 713. 1920. #1:/Idaho-Bulletin 713/mgr00184 ID. Mansfield, M.R. 184 Panoramic view west through the Narrows of Ross Fork Canyon, part of the course of the Putnam overthrust is shown, together with some of the Cambrian and Ordovician formations. The upper slopes show the topography of the Putnam cycle. The canyon around little knoll (left center) represents the Gibson cycle. Caribou County, Idaho. 1913. Plate 1-C in U.S. Geological Survey. Bulletin 713. 1920. #1:/Idaho-Bulletin 713/mgr00195 ID. Mansfield, M.R. 195 Characteristic strike ridge of Higham grit in sec. 18, T. 3 S., R. 38 E. note the comblike continuation of the ridge along the horizon. Formations exposed from slight left of center to right are: Nugget sandstone, Wood shale. Deadman limestone, Higham grit, Timothy sandstone, Portneuf limestone. Blaine County, Idaho. 1913. Plate 2-A in U.S. Geological Survey. Bulletin 713. 1920. #1:/Idaho-Bulletin 713/mgr00206 ID. Mansfield, M.R. 206 Panorama of North and South Putnam Mountains, view northeast from hill about 1 mile south of the canyon of the south fork of Ross Fork Creek, showing the topography of the Putnam cycle and some of the structural features of the ridge. Caribou County, Idaho. 1913. Plate 1-A in U.S. Geological Survey. Bulletin 713. 1920. #1:/Idaho-Bulletin 713/mgr00207 ID. Mansfield, M.R. 207 Panorama of North and South Putnam Mountains, view northeast from hill about 1 mile south of the canyon of the south fork of Ross Fork Creek, showing the topography of the Putnam cycle and some of the structural features of the ridge. Caribou County, Idaho. 1913. Plate 1-A in U.S. Geological Survey. Bulletin 713. 1920. #1:/Idaho-Bulletin 713/mgr00208 ID. Mansfield, M.R. 208 Panorama of North and South Putnam Mountains, view northeast from hill about 1 mile south of the canyon of the south fork of Ross Fork Creek, showing the topography of the Putnam cycle and some of the structural features of the ridge. Caribou County, Idaho. 1913. Plate 1-A in U.S. Geological Survey. Bulletin 713. 1920. #1:/Idaho-Bulletin 713/mgr00213 ID. Mansfield, M.R. 213 Characteristic exposure of volcanic ash in sec. 11, T.4 S., R. 36. E. Bingham County, Idaho. 1913. Plate 11-A in U.S. Geological Survey. Bulletin 713. 1920. #1:/Arizona-Bulletin 710/rfl01099 ID. Ransome, F.L. 1099 Prompter Mine, Tombstone district, from the east, the open cuts are on the Prompter fault fissure, which is crossed by the road just to the left of the view. The Oregon shaft is on the other side of the hill, west of these cuts. The rock in the foreground and on the slope to the right of the fault fissure is Naco limestone; that on the left of the fissure is chieflDy Abrigo limestone, with a little Bolsa quartzite on the top of the hill. The distant hills are rhyolite porphyry. Cochise County, Arizona. 1918. Plate 8-B in U.S. Geological Survey. Bulletin 710. 1920. #1:/Arizona-Bulletin 710/rfl01102 ID. Ransome, F.L. 1102 Open-cut workings on the Twilight claims of the Higgins Mining Co. from the northwest Bisbee. All the rock in the view is Escabrosa limestone, and the prominent outcrop on the left shows some of the minor fissuring found in the vicinity of fault zones. Only a small part of the manganese pit can be seen in this view. Cochise County, Arizona. 1918. Plate 6-B in U.S. Geological Survey. Bulletin 710. 1920. #1:/Arizona-Bulletin 710/rfl01106 ID. Ransome, F.L. 1106 Shallow working for manganese ore on the Danville and Hanchette fraction claim of the Phelps Dodge Corporation, southeast of Bisbee, Cochise County, Arizona. 1918. Plate 8- A in U.S. Geological Survey. Bulletin 710. 1920. #1:/Arizona-Bulletin 710/rfl01111 ID. Ransome, F.L. 1111 General view of the central part of the Bisbee district, from the southeast, showing the character of the limestone hills in which the manganese deposits occur, the town in the foreground is Warren. Sacramento Hill is the sharp-topped eminence outlined rather faintly against the hills in the middle distance. Bisbee lies in a canyon behind it. Cochise County, Arizona. 1918. Plate 6-A in U.S. Geological Survey. Bulletin 710. 1920. #1:/Arizona-Bulletin 710/rfl01112 ID. Ransome, F.L. 1112 Open-cut in manganese ore on the west side of the Bisbee-Warren Electric Line, opened by the Calumet & Arizona Mining Co., looking southwest, Bisbee. This view shows how ore makes out in certain beds of the Naco limestone. Cochise County, Arizona. 1918. Plate 7-B in U.S. Geological Survey. Bulletin 710. 1920. #1:/Arizona-Bulletin 710/rfl01113 ID. Ransome, F.L. 1113 Open-cuts in manganese ore on the east side of the Bisbee-Warren Electric Line, opened by the Calumet & Arizona Mining Co., looking east, Bisbee. This view shows a characteristic exposure of Naco limestone beyond the cuts. Cochise County, Arizona. 1918. Plate 7-A in U.S. Geological Survey. Bulletin 710. 1920. #1:/Iowa-Bulletin 697/srw00717 ID. Stone, R.W. 717 Gypsum outcrop on Fort Dodge, Des Moines & Southern railroad half a mile south of Des Moines River near Fort Dodge. This outcrop shows bedding, solution channels and durability under long exposure. Webster County, Iowa. 1916. Plate 13-B in U.S. Geological Survey. Bulletin 697. 1920. #1:/Ohio-Bulletin 697/srw00718 ID. Stone, R.W. 718 Mine of United States Gypsum Co, at Gypsum, view show abandoned workings on upper bed and incline to lower bed. Ottawa County, Ohio. 1916. Plate 26-A in U.S. Geological Survey. Bulletin 697. 1920. #1:/Ohio-Bulletin 697/srw00724 ID. Stone, R.W. 724 Gypsum quarry 2 miles east of Nephi, white rock rising 500 feet above valley is gypsum, and quarry extends to top. Mill is just beyond waste dump. Juab County, Utah. 1916. Plate 32-B in U.S. Geological Survey. Bulletin 697. 1920. #1:/Arizona-Bulletin 697/srw00743 ID. Stone, R.W. 743 Gypsum quarry 2 miles west of Winslow, at this quarry very little stripping is required. Ledge from which gypsum is blasted is shown on the left. Navajo County, Arizona. 1916. Plate 8-A in U.S. Geological Survey. Bulletin 697. 1920. #1:/Arizona-Bulletin 697/srw00747 ID. Stone, R.W. 747 Gypsite deposit, Douglas, loading is done by horse scrapers that dump through platform to wagon below. Cochise County, Arizona. 1916. Plate 7-A in U.S. Geological Survey. Bulletin 697. 1920. #1:/Arizona-Bulletin 697/srw00748 ID. Stone, R.W. 748 Mill of Arizona Gypsum Plaster Co., at Douglas, gypsum block and tile in yard in foreground. Cochise County, Arizona. 1916. Plate 7-B in U.S. Geological Survey. Bulletin 697. 1920. #1:/New Mexico-Bulletin 716/winc0203 ID. Winchester, D.E. 203 Cross-bedded sandstone of the "red beds" at Ojo de Los Chupaderos, in sec. 12, T. 2 N., R. 6 W. Socorro County, New Mexico. 1914. Plate 2 in U.S. Geological Survey. Bulletin 716. 1920. #1:/New Mexico-Bulletin 716/winc0244 ID. Winchester, D.E. 244 Pueblo Viejo, a typical development of the Gallego sandstone member of the Miguel formation. Socorro County, New Mexico. 1914. Plate 3-B in U.S. Geological Survey. Bulletin 716. 1920. #1:/New Mexico-Bulletin 716/winc0253 ID. Winchester, D.E. 253 Bell Mountain sandstone member of Miguel formation at foot of Bell Mountain. Socorro County, New Mexico. 1914. Plate 3-B in U.S. Geological Survey. Bulletin 716. 1920. #1:/New Mexico-Bulletin 716/winc0271 ID. Winchester, D.E. 271 La Cruz Peak, a basalt plug, Socorro County, New Mexico. 1914. Plate 1-B in U.S. Geological Survey. Bulletin 716. 1920. #1:/Ohio-Bulletin 720/cdd00104 ID. Condit, D.D. 104 Typical exposure of Benwood limestone along Bend Fork near Captina Creek. Belmont County, Ohio. 1914. Plate 10-B in U.S. Geological Survey. Bulletin 720. 1923. #1:/Ohio-Bulletin 720/cdd00105 ID. Condit, D.D. 105 Sandstone overlying Meigs Creek coal at mouth of Brushy Fork on Captina Creek. Belmont County, Ohio. 1914. Plate 11-A in U.S. Geological Survey. Bulletin 720. 1923. #1:/Ohio-Bulletin 720/cdd00106 ID. Condit, D.D. 106 Quarry in sandstone near Woodsfield. Monroe County, Ohio. 1914. Plate 11-B in U.S. Geological Survey. Bulletin 720. 1923 #1:/Ohio-Bulletin 720/cdd00108 ID. Condit, D.D. 108 Prospect in Uniontown coal bed near Hunter. Noble County, Ohio. 1914. Plate 4-A in U.S. Geological Survey. Bulletin 720. 1923. #1:/Ohio-Bulletin 720/cdd00116 ID. Condit, D.D. 116 Sandy shales over Uniontown coal at Whigville. Noble County, Ohio. 1914. Plate 4-B in U.S. Geological Survey. Bulletin 720. 1923. #1:/Ohio-Bulletin 720/cdd00117 ID. Condit, D.D. 117 Upland landscape near Summerfield. Noble County, Ohio. 1914. Plate 1 in U.S. Geological Survey. Bulletin 720. 1923. #1:/Ohio-Bulletin 720/cdd00118 ID. Condit, D.D. 118 Lower Pittsburg limestone near Sarahsville; general view. Noble County, Ohio. 1914. Plate 2-B in U.S. Geological Survey. Bulletin 720. 1923. #1:/Ohio-Bulletin 720/cdd00120 ID. Condit, D.D. 120 Lower Pittsburg limestone near Sarahsville; close view showing pebbly texture. Noble County, Ohio. 1914. Plate 2-A in U.S. Geological Survey. Bulletin 720. 1923. #1:/Ohio-Bulletin 720/cdd00121 ID. Condit, D.D. 121 Structure of calcareous clay near base of Benwood limestone. Noble County, Ohio. 1914. Plate 3-B in U.S. Geological Survey. Bulletin 720. 1923. #1:/Ohio-Bulletin 720/cdd00124 ID. Condit, D.D. 124 Open cut working of Meigs Creek coal near Bethesda. Belmont County, Ohio. 1914. Plate 3-A in U.S. Geological Survey. Bulletin 720. 1923. #1:/Ohio-Bulletin 720/cdd00128 ID. Condit, D.D. 128 Sandstone overlying Uniontown coal horizon 2 miles west of Miltonsburg. Monroe County, Ohio. 1914. Plate 10-A in U.S. Geological Survey. Bulletin 720. 1923. #1:/Nevada-Bulletin 723/fhg00031 ID. Ferguson, H.G. 31 Round Rock a typical erosion form of the Round Rock breccia. Nye County, Nevada. 1915. Plate 3-A in U.S. Geological Survey. Bulletin 723. 1924. #1:/Nevada-Bulletin 723/fhg00045 ID. Ferguson, H.G. 45 Manhattan gulch between Mount Moriah and Wolf Tone Point, showing placer workings. Nye County, Nevada. 1915. Plate 17-A in U.S. Geological Survey. Bulletin 723. 1924. #1:/Nevada-Bulletin 723/fhg00047 ID. Ferguson, H.G. 47 "Pipe workings" on upper part of Mustang claim (Train & Chase lease). Nye County, Nevada. 1915. Plate 14-B in U.S. Geological Survey. Bulletin 723. 1924. #1:/Nevada-Bulletin 723/fhg00061 ID. Ferguson, H.G. 61 Central part pf Toquima Range near head of Meadow Creek, showing older mature topography. Nye County, Nevada. 1915. Plate 6-A in U.S. Geological Survey. Bulletin 723. 1924. #1:/Nevada-Bulletin 723/fhg00066 ID. Ferguson, H.G. 66 Front of Toyable range from Toquima Range, showing fault scarp topography. Nye County, Nevada. 1915. Plate 6-B in U.S. Geological Survey. Bulletin 723. 1924. #1:/Nevada-Bulletin 723/fhg00067 ID. Ferguson, H.G. 67 Hedwig breccia resting on contorted slates of the Toquima formation north of Mustang Hill. Nye County, Nevada. 1915. Plate 3-B in U.S. Geological Survey. Bulletin 723. 1924. #1:/Nevada-Bulletin 723/fhg00069 ID. Ferguson, H.G. 69 Front of Toquima Range, looking north from western part of Manhattan district. Nye County, Nevada. 1915. Plate 6-C in U.S. Geological Survey. Bulletin 723. 1924. #1:/Nevada-Bulletin 723/fhg00089 ID. Ferguson, H.G. 89 Placer mine in western part of Manhattan gulch, showing sluice boxes and pond. Nye County, Nevada. 1915. Plate 17-B in U.S. Geological Survey. Bulletin 723. 1924. #1:/Nevada-Bulletin 723/fhg00197 ID. Ferguson, H.G. 197 Hills of volcanic rocks north of Belmont road. Nye County, Nevada. 1915. Plate 4 in U.S. Geological Survey. Bulletin 723. 1924. #1:/Nevada-Bulletin 723/fhg00198 ID. Ferguson, H.G. 198 Hills of volcanic rocks north of Belmont road. Nye County, Nevada. 1915. Plate 4 in U.S. Geological Survey. Bulletin 723. 1924. #1:/Nevada-Bulletin 723/fhg00201 ID. Ferguson, H.G. 201 Big Pine glory hole. Nye County, Nevada. 1915. Plate 9-A in U.S. Geological Survey. Bulletin 723. 1924. #1:/Nevada-Bulletin 723/fhg00203 ID. Ferguson, H.G. 203 Old stope of Little Grey mine, showing the older Pleistocene gravel resting on the Cambrian(?) schists. Nye County, Nevada. 1915. Plate 5-B in U.S. Geological Survey. Bulletin 723. 1924. #1:/Nevada-Bulletin 723/fhg00212 ID. Ferguson, H.G. 212 Limestone partly replaced by coarsely crystalline white calcite, 310-foot level White Caps mine. Nye County, Nevada. 1915. Plate 11-A in U.S. Geological Survey. Bulletin 723. 1924. #1:/Nevada-Bulletin 723/fhg00213 ID. Ferguson, H.G. 213 South end of April Fool Hill, showing workings in the White Caps limestone, the outcrop of folded limestone is outlined by the position of the shallow shafts. Nye County, Nevada. 1915. Plate 13-A in U.S. Geological Survey. Bulletin 723. 1924. #1:/Nevada-Bulletin 723/fhg00231 ID. Ferguson, H.G. 231 Folds in Zanzibar limestone near Tonopah road. Nye County, Nevada. 1915. Plate 5-A in U.S. Geological Survey. Bulletin 723. 1924. #1:/Colorado-Bulletin 718/les00001 ID. Larsen, E.S. 1 Willow Creek canyon above Creede. Mineral County, Colorado. 1911. Plate 8-B in U.S. Geological Survey. Bulletin 718. 1923. #1:/Colorado-Bulletin 718/les00002 ID. Larsen, E.S. 2 Cliffs of Willow Creek rhyolite near forks of Willow Creek. Mineral County, Colorado. 1911. Plate 10-A in U.S. Geological Survey. Bulletin 718. 1923. #1:/Colorado-Bulletin 718/les00005 ID. Larsen, E.S. 5 Sheeting of Willow Creek rhyolite. Mineral County, Colorado. 1911. Plate 10-B in U.S. Geological Survey. Bulletin 718. 1923. #1:/Colorado-Bulletin 718/les00014 ID. Larsen, E.S. 14 Cliffs of Willow Creek rhyolite near forks of Willow Creek. Mineral County, Colorado. 1911. Plate 9 in U.S. Geological Survey. Bulletin 718. 1923. #1:/Colorado-Bulletin 718/les00057 ID. Larsen, E.S. 57 Creede, Mineral County, Colorado. 1911. Plate 3 in U.S. Geological Survey. Bulletin 718. 1923. #1:/Colorado-Bulletin 718/les00058 ID. Larsen, E.S. 58 Creede, Mineral County, Colorado. 1911. Plate 3 in U.S. Geological Survey. Bulletin 718. 1923. #1:/Colorado-Bulletin 718/les00066 ID. Larsen, E.S. 66 Basin of East Willow Creek. Mineral County, Colorado. 1911. Plate 4-B in U.S. Geological Survey. Bulletin 718. 1923. #1:/Colorado-Bulletin 718/les00067 ID. Larsen, E.S. 67 Basin of East Willow Creek. Mineral County, Colorado. 1911. Plate 4-B in U.S. Geological Survey. Bulletin 718. 1923. #1:/Colorado-Bulletin 718/les00068 ID. Larsen, E.S. 68 Basin of East Willow Creek. Mineral County, Colorado. 1911. Plate 4-B in U.S. Geological Survey. Bulletin 718. 1923. #1:/Colorado-Bulletin 718/les00069 ID. Larsen, E.S. 69 Basin of East Willow Creek. Mineral County, Colorado. 1911. Plate 4-B in U.S. Geological Survey. Bulletin 718. 1923. #1:/Colorado-Bulletin 718/les00071 ID. Larsen, E.S. 71 Fault east of Sunnyside. Mineral County, Colorado. 1911. Plate 11-A in U.S. Geological Survey. Bulletin 718. 1923. #1:/Colorado-Bulletin 718/les00072 ID. Larsen, E.S. 72 Sunnyside. Mineral County, Colorado. 1911. Plate 11-B in U.S. Geological Survey. Bulletin 718. 1923. #1:/California-Bulletin 725/les00169 ID. Larsen, E.S. 169 Canyon of Pine Creek near Bishop, showing rugged topography in the granite. The Pine Creek tungsten deposit is just beyond the ridge in the center background. Inyo County, California. 1918. Plate 12 in U.S. Geological Survey. Bulletin 725. 1922. #1:/California-Bulletin 725/les00266 ID. Larsen, E.S. 266 Mill and houses of Tungsten Mines Co., near Bishop. Inyo County, California. 1918. Plate 11-B in U.S. Geological Survey. Bulletin 725. 1922. #1:/California-Bulletin 725/les00267 ID. Larsen, E.S. 267 Glory hole of Tungsten Mines Co., near Bishop. Inyo County, California. 1918. Plate 11- A in U.S. Geological Survey. Bulletin 725. 1922. #1:/Nevada-Bulletin 725/les00274 ID. Larsen, E.S. 274 Tungsten district near Mill City, view of the mill in course of construction, and the workings of the Nevada-Humboldt Tungsten Mines Co. Pershing County, Nevada. 1918. Plate 13 in U.S. Geological Survey. Bulletin 725. 1922. #1:/New Jersey-Bulletin 727/mgr00432 ID. Mansfield, G.R. 432 Shell bed at the base of the Navesink marl at Mullica Hill, just east of station. Gloucester County, New Jersey. 1919. Plate 6-B in U.S. Geological Survey. Bulletin 727. 1922. #1:/New Jersey-Bulletin 727/mgr00434 ID. Mansfield, G.R. 434 Recent digging at northwest corner of West Jersey Marl & Transportation Co.'s marl pit near Sewell. Gloucester County, New Jersey. 1919. Plate 8-B in U.S. Geological Survey. Bulletin 727. 1922. #1:/New Jersey-Bulletin 727/mgr00447 ID. Mansfield, G.R. 447 Drilling outfit and operations at Woodstown; note flag at half-mast for Theodore Roosevelt. Salem County, New Jersey. January 7, 1919. Plate 7-A in U.S. Geological Survey. Bulletin 727. 1922. #1:/New Jersey-Bulletin 727/mgr00450 ID. Mansfield, G.R. 450 General view of William Hoffman's marl pit at Birmingham, about three-fourths of a mile northwest of station, shows recent digging at the north end and, in the distance, the old west bank of the pit. Burlington County, New Jersey. 1919. Plate 6-A in U.S. Geological Survey. Bulletin 727. 1922. #1:/New Jersey-Bulletin 727/mgr00451 ID. Mansfield, G.R. 451 Northwest corner of recent opening of William Hoffman's pit at Birmingham, showing efflorescence and stratification of greensand and creep along the face of the old bank, indicated by the contortion of sand-filled crevices. Burlington County, New Jersey. 1919. Plate 9-B in U.S. Geological Survey. Bulletin 727. 1922. #1:/New Jersey-Bulletin 727/mgr00452 ID. Mansfield, G.R. 452 Dredge pit, and stock pile of Atlantic Potash Corporation about 1.1 miles east of Marlton. Note abundance of water in pit. Burlington County, New Jersey. 1919. Plate 8-A in U.S. Geological Survey. Bulletin 727. 1922. #1:/New Jersey-Bulletin 727/mgr00455 ID. Mansfield, G.R. 455 North end of pit at R.S. Ryan Co.'s plant at Reeves Station, showing ironstone overlying locally efflorescent greensand. Burlington County, New Jersey. 1919. Plate 9-A in U.S. Geological Survey. Bulletin 727. 1922. #1:/New Jersey-Bulletin 727/mgr00456 ID. Mansfield, G.R. 456 Potash plant of R.S. Ryan Co. at Reeves station. Burlington County, New Jersey. 1919. Plate 9-D in U.S. Geological Survey. Bulletin 727. 1922. #1:/New Jersey-Bulletin 727/mgr00457 ID. Mansfield, G.R. 457 Potash plant of R.S. Ryan Co. at Reeves station. Burlington County, New Jersey. 1919. Plate 9-D in U.S. Geological Survey. Bulletin 727. 1922. #1:/New Jersey-Bulletin 727/mgr00458 ID. Mansfield, G.R. 458 Potash plant of R.S. Ryan Co. at Reeves station. Burlington County, New Jersey. 1919. Plate 9-D in U.S. Geological Survey. Bulletin 727. 1922. #1:/New Jersey-Bulletin 727/mgr00462 ID. Mansfield, G.R. 462 Sampling trough in use at Elmwood Road, Burlington County, New Jersey. 1919. Plate 7-B in U.S. Geological Survey. Bulletin 727. 1922. #1:/New Jersey-Bulletin 727/mgr00468 ID. Mansfield, G.R. 468 Pit at Farmingdale, formerly owned and operated by Squankum Marl Co.; now owned by D.Mahoney, northwest showing present overgrown and flooded condition. Monmouth County, New Jersey. 1919. Plate 9-C in U.S. Geological Survey. Bulletin 727. 1922. #1:/New Jersey-Bulletin 727/mgr00472 ID. Mansfield, G.R. 472 Microphotographs of glauconite: Grains between 1/10 and 1/20 inch in diameter, the maximum size X 10, showing characteristic shapes. New Jersey. 1919. Plate 4-A in U.S. Geological Survey. Bulletin 727. 1922. #1:/New Jersey-Bulletin 727/mgr00473 ID. Mansfield, G.R. 473 Microphotographs of glauconite: Grains between 1/20 and 1/40 inch X 10, shapes similar to those in Mansfield 472, but more worn. New Jersey. 1919. Plate 4-B in U.S. Geological Survey. Bulletin 727. 1922. #1:/New Jersey-Bulletin 727/mgr00474 ID. Mansfield, G.R. 474 Microphotographs of glauconite: Grains between 1/40 and 1/60 inch, X 10 shapes similar to those in Mansfield 472 and 473 but considerably more worn. New Jersey. 1919. Plate 4-C in U.S. Geological Survey. Bulletin 727. 1922. #1:/New Jersey-Bulletin 727/mgr00475 ID. Mansfield, G.R. 475 Microphotographs of glauconite: thin section of glauconite grains between 1/40 and 1/60 inch. X 50, showing the flaky to granular structure of the glauconite and in the center a suppose crystal with rude cleavage. New Jersey. 1919. Plate 4-D in U.S. Geological Survey. Bulletin 727. 1922. #1:/Montana-Bulletin 725/pjt00472 ID. Pardee, J.T. 472 Section of manganese nodule from Bryant mine: Philipsburg district. Granite County, Montana. 1916. Plate 8-A in U.S. Geological Survey. Bulletin 725. 1922. #1:/Montana-Bulletin 725/pjt00473 ID. Pardee, J.T. 473 Rhodochrosite from Emma mine, Butte district, Silver Bow County, Montana. 1916. Plate 9-B in U.S. Geological Survey. Bulletin 725. 1922. #1:/Montana-Bulletin 725/pjt00474 ID. Pardee, J.T. 474 Manganese nodule from Bryant mine: Philipsburg district. Granite County, Montana. 1916. Plate 8-B in U.S. Geological Survey. Bulletin 725. 1922. #1:/Montana-Bulletin 725/pjt00475 ID. Pardee, J.T. 475 Cavernous manganese oxide ore from Algonquin mine, Philipsburg district. Granite County, Montana. 1916. Plate 9-A in U.S. Geological Survey. Bulletin 725. 1922. #1:/Utah-Bulletin 725/pjt00476 ID. Pardee, J.T. 476 Manganese oxide ore from Needles mine, Little Grande district, Salt Lake County, Utah. 1916. Plate 10-A in U.S. Geological Survey. Bulletin 725. 1922. #1:/Oregon-Bulletin 725/pjt00477 ID. Pardee, J.T. 477 Manganiferous tuff from Tyrrell mine Lake Creek district. Jackson County, Oregon. 1916. Plate 10-B in U.S. Geological Survey. Bulletin 725. 1922. #1:/Arizona-Bulletin 725/rfl01134 ID. Ransome, F.L. 1134 Workings on the Sunshine claim, Papago district, from the southeast, looking down the Dry bed of Ash Creek. Pima County, Arizona. 1920. Plate 17-B in U.S. Geological Survey. Bulletin 725. 1922. #1:/Arizona-Bulletin 725/rfl01137 ID. Ransome, F.L. 1137 Workings on the Sunshine claim, Papago district, from the east. To the right is the main shaft. To the left of it is an open cut across the ore-bearing limestone. In the end of the ridge to the left is another open cut. In the distance are the Baboquivari Range and Baboquivari Peak. Pima County, Arizona. 1920. Plate 17-A in U.S. Geological Survey. Bulletin 725. 1922. #1:/Arizona-Bulletin 725/rfl01150 ID. Ransome, F.L. 1150 Mineral Hill mine, Pima district, from the south, the flat topped hill in the distance is a part of the Black Mountains. Pima County, Arizona. 1920. Plate 19-A in U.S. Geological Survey. Bulletin 725. 1922. #1:/Arizona-Bulletin 725/rfl01151 ID. Ransome, F.L. 1151 Southwest toward the Sierrita Mountains, from a point near the San Xavier mine, the hills in the foreground are mainly Paleozoic limestone. Beyond them and to the left is the rock-floored plain. The old Olive camp mines are in the vicinity of the two low hills that interrupt the general even surface of the plain in the left-hand part of the view. Pima County, Arizona. 1920. Plate 16-A in U.S. Geological Survey. Bulletin 725. 1922. #1:/Arizona-Bulletin 725/rfl01152 ID. Ransome, F.L. 1152 West over the piedmont plain to the Sierrita Mountains from the Wellington mine, about 2 miles south of Helmet Peak. Pima County, Arizona. 1920. Plate 16-B in U.S. Geological Survey. Bulletin 725. 1922. #1:/Arizona-Bulletin 725/rfl01154 ID. Ransome, F.L. 1154 Northwest toward the Copper Queen mine and the settlement of Twin Buttes, Pima district, from a point near the Copper Glance mine, the Sierrita Mountains appear in the distance, to the left. Pima County, Arizona. 1920. Plate 19-B in U.S. Geological Survey. Bulletin 725. 1922. #1:/Arizona-Bulletin 725/rfl01157 ID. Ransome, F.L. 1157 Senator Morgan mine, Sierrita Mountains from the south. The ore zone crops out along the low ridge to which a trestle bridge extends from the shaft. On the extreme left is part of the dump of the old shaft. Beyond the mine is the dissected surface of the piedmont plain, surmounted in the distance by Helmet Peak and the neighboring limestone hills near the San Xavier and Mineral Hill mines. Pima County, Arizona. 1920. Plate 16-C in U.S. Geological Survey. Bulletin 725. 1922. #1:/North Dakota-Bulletin 726/bcm00028 ID. Bauer, C.M. 28 Bare Buttes in Squaw Creek valley in Sec. 10, T. 148 N., R. 93 W. Fort Berthold Indian Reservation, North Dakota. 1913. Plate 25-B in U.S. Geological Survey Bulletin 726. 1922. #1:/North Dakota-Bulletin 726/bcm00029 ID. Bauer, C.M. 29 Buttes in T.148 N., R.93 W. Fort Berthold Indian Reservation, North Dakota. 1913. Plate 24-B in U.S. Geological Survey Bulletin 726. 1922. #1:/North Dakota-Bulletin 726/bcm00030 ID. Bauer, C.M. 30 Up Squaw Creek, Dunn County, North Dakota. 1913. Plate 25-A in U.S. Geological Survey Bulletin 726. 1922. #1:/North Dakota-Bulletin 726/bcm00031 ID. Bauer, C.M. 31 Buttes in Sec. 9 T.148 N., R.93 W. Fort Berthold Indian Reservation, North Dakota. 1913. Plate 24-A in U.S. Geological Survey Bulletin 726. 1922. #1:/North Dakota-Bulletin 726/bcm00035 ID. Bauer, C.M. 35 Glacial boulders on the upland in T. 147 N., R. 93 W. Fort Berthold Indian Reservation North Dakota. 1913. Plate 19-A in U.S. Geological Survey Bulletin 726. 1922. #1:/North Dakota-Bulletin 726/bcm00039 ID. Bauer, C.M. 39 Valley of Moccasin Creek, near its mouth in Sec. 6, T. 147 N., R. 92 W. looking north. Fort Berthold Indian Reservation, North Dakota. 1913. Plate 15-B in U.S. Geological Survey Bulletin 726. 1922. #1:/North Dakota-Bulletin 726/bcm00040 ID. Bauer, C.M. 40 "Breaks" of the Little Missouri, looking southeast toward the mouth of Hans Creek, Fort Berthold Indian Reservation, North Dakota. 1913. Plate 13-A in U.S. Geological Survey Bulletin 726. 1922. #1:/North Dakota-Bulletin 726/bcm00041 ID. Bauer, C.M. 41 Badlands in Sec. 26, T. 147 N., R. 93 W. Fort Berthold Indian Reservation, North Dakota. 1913. Plate 14-A in U.S. Geological Survey Bulletin 726. 1922. #1:/North Dakota-Bulletin 726/bcm00042 ID. Bauer, C.M. 42 Badlands in Sec. 25, T. 147 N., R. 93 W. Fort Berthold Indian Reservation, North Dakota. 1913. Plate 19-B in U.S. Geological Survey Bulletin 726. 1922 #1:/North Dakota-Bulletin 726/bcm00043 ID. Bauer, C.M. 43 Bed of lignite 8 feet thick in natural exposure in Sec. 14, T. 147 N. R. 93 W. Fort Berthold Indian Reservation, North Dakota. 1913. Plate 14-B in U.S. Geological Survey Bulletin 726. 1922 #1:/North Dakota-Bulletin 726/bcm00046 ID. Bauer, C.M. 46 Log concretions in Fort Union formation. Berthold Indian Reservation, North Dakota. 1913. Plate 18-B in U.S. Geological Survey Bulletin 726. 1922. #1:/North Dakota-Bulletin 726/bcm00061 ID. Bauer, C.M. 61 Rolling upland in the Fort Berthold Indian Reservation, North Dakota. 1913. Plate 22-B in U.S. Geological Survey Bulletin 726. 1922. #1:/North Dakota-Bulletin 726/bcm00066 ID. Bauer, C.M. 66 Sage brush flat on Hans Creek, and bluffs of the Fort Union formation. Dunn County, North Dakota. 1913. Plate 22-A in U.S. Geological Survey Bulletin 726. 1922. #1:/North Dakota-Bulletin 726/bcm00069 ID. Bauer, C.M. 69 Bare Buttes, of the Fort Union formation on the south side of Hans Creek. Dunn County, North Dakota. 1913. Plate 18-A in U.S. Geological Survey Bulletin 726. 1922. #1:/North Dakota-Bulletin 726/bcm00070 ID. Bauer, C.M. 70 Fossil log standing nearly upright in clay shale of the Fort Union formation. Dunn County, North Dakota. 1913. Plate 21-A in U.S. Geological Survey Bulletin 726. 1922 #1:/Colorado-Bulletin 729/winc0566 ID. Winchester, D.E. 566 Oil in Parachute cliffs at head of Cottonwood Gulch. Rio Blanco County, Colorado. 1916. Plate 11 in U.S. Geological Survey Bulletin 729. 1923. #1:/Colorado-Bulletin 729/winc0567 ID. Winchester, D.E. 567 Oil in Parachute cliffs at head of Cottonwood Gulch. Rio Blanco County, Colorado. 1916. Plate 11 in U.S. Geological Survey Bulletin 729. 1923. #1:/Colorado-Bulletin 729/winc0568 ID. Winchester, D.E. 568 Oil in Parachute cliffs at head of Cottonwood Gulch. Rio Blanco County, Colorado. 1916. Plate 11 in U.S. Geological Survey Bulletin 729. 1923. #1:/United States/btj00025 ID. Buchanan, T.J. 25 Price type AA meter; and Price pygmy meter. United States. Figure 4 in U.S. Geological Survey. Techniques of water-resources investigations of the United States Geological Survey. Book 3, chapter A8. 1969. #1:/United States/btj00034 ID. Buchanan, T.J. 34 Round wading rod with meter attached. United States. Figure 15 in U.S. Geological Survey. Techniques of water-resources investigations of the United States Geological Survey. Book 3, chapter A8. 1969. #1:/United States/btj00036 ID. Buchanan, T.J. 36 Lower section of ice rod for use with Price meter. United States. Figure 17 in U.S. Geological Survey. Techniques of water-resources investigations of the United States Geological Survey. Book 3, chapter A8. 1969. #1:/California/hjc00056 ID. Hoyt, J.C. 56 Water meter testing equipment station Los Angeles County, California. Circa 1900. #1:/California/h2op0002 ID. Water Supply Paper, 2 Artificial control on Cottonwood Creek, Southern California. Note double exposure of man in photograph. April 15. 1913. #1:/Minnesota-Water Supply Paper 337/h2op0003 ID. Water Supply Paper, 3 Winter water measurement Vermillion River below Vermillion Lake. St. Louis County, Minnesota. Plate 2-A in U.S. Geological Survey. Water Supply Paper 337. 1913. #1:/Minnesota-Water Supply Paper 337/h2op0006 ID. Water Supply Paper, 6 Water measurement on Rum River near Cambridge, Isanti County, Minnesota. Plate 1-B in U.S. Geological Survey. Water Supply Paper 337. 1913. #1:/New Hampshire-Water Supply Paper 337/h2op0009 ID. Water Supply Paper, 9 Water measurement on Shoal Pond Brook, Grafton County, New Hampshire. Plate 7-B in U.S. Geological Survey. Water Supply Paper 337. 1913. #1:/New Mexico/h2op0012 ID. Water Supply Paper, 12 Rio Grande gauging station, Rio Grande River, Embudo, Rio Arriba County, New Mexico. Circa 1899. #1:/New Mexico/h2op0015 ID. Water Supply Paper, 15 Interior of Rio Grande gauging station, Rio Grande River, Embudo, Rio Arriba County, New Mexico. Circa 1899. #1:/Massachausetts/h2op0016 ID. Water Supply Paper, 16 Gaging station, Deerfield River at Charlemont, Franklin County, Massachusetts. #1:/Washington D.C /h2op0021 ID. Water Supply Paper, 21 Group photo U. S. Geological Survey, Water Resources Division. Back row, F.F. Henshaw, G.C. Baldwin, W.G. Hoyt, A.H. Horton, G.L. Parker, G.A. Gray. Middle row G.K. Larrison, J.C. Hoyt, E.A. Porter, N.C. Grover, W.A. Lamb, W.E. Hall. Front row G.C. Stevens, C.C. Covert, Robert Follansbee, C.C. Jacob, H.D. McGlashan. Washington D.C. #1:/Arizona-Water Supply Paper 320/h2op0024 ID. Water Supply Paper, 24 Portable weir box in use. Cochise County, Arizona. Plate 15-B in U.S. Geological Survey Water Supply Paper 320. 1913. #1:/Arizona-Water Supply Paper 320/h2op0025 ID. Water Supply Paper, 25 Portable weir box ready for transportation. Cochise County, Arizona. Plate 15-A in U.S. Geological Survey Water Supply Paper 320. 1913. #1:/Maine-Water Supply Paper 351 /h2op0026 ID. Water Supply Paper, 26 Gurley automatic water gage. Plate 2-B in U.S. Geological Survey Water Supply Paper 320. 1915. #1:/Equipment/h2op0033 ID. Water Supply Paper, 33 Automatic water stage register installation. Friez Register. #1:/California/h2op0037 ID. Water Supply Paper, 37 Tuolumne River below Hetch Hetchy dam site near Sequoia, across channel to left bank showing masonry well, house car, cable and stay wire. C.J. Emerson in car. Tuolumne County, California. #1:/California/h2op0040 ID. Water Supply Paper, 40 Tuolumne River below Hetch Hetchy dam site near Sequoia, View of masonry well, house and C.J. Emerson. Cable car and cable in background. Tuolumne County, California. #1:/California/h2op0042 ID. Water Supply Paper, 42 H.D. McGlashan making a wading measurement on Merced River below Stoneman Bridge, Yosemite Valley (near Camp Curry). This was the site of the movie film. Mariposa County, California. Circa 1920. #1:/California/h2op0043 ID. Water Supply Paper, 43 H.D. McGlashan making a wading measurement on Merced River below Stoneman Bridge, Yosemite Valley (near Camp Curry). This was the site of the movie film. Mariposa County, California. Circa 1920. #1:/California/h2op0050 ID. Water Supply Paper, 50 Meeks and Daley ditch near Colton, view of water-stage recorder and concrete shelter, San Bernardino County, California. #1:/Maryland/h2op0083 ID. Water Supply Paper, 83 Chevy Chase Lake meter testing equipment and personnel, J.C. Hoyt at right. Montgomery County, Maryland. Circa 1909. #1:/Maryland/h2op0085 ID. Water Supply Paper, 85 Chevy Chase Lake meter testing equipment and personnel. Montgomery County, Maryland. Circa 1909. #1:/Maryland/h2op0086 ID. Water Supply Paper, 86 Close-up of Chevy Chase Lake meter testing equipment and personnel, Montgomery County, Maryland. Circa 1909. #1:/Tennessee/h2op0090 ID. Water Supply Paper, 90 Power boom, Memphis, Shelby County, Tennessee. Circa 1935. #1:/Oregon/h2op0091 ID. Water Supply Paper, 91 Recorder house, Columbia River at Celilo, Wasco County, Oregon. #1:/United States/h2op0123 ID. Water Supply Paper, 123 Hydrologic engineer with loaded with field equipment. United States. Circa 1920. #1:/Oregon/h2op0137 ID. Water Supply Paper, 137 Measuring cable, Columbia River above Dalles, Length 1727 feet, height above ground, 110 feet. Wasco County, Oregon. #1:/West Virginia/h2op0158 ID. Water Supply Paper, 158 Potomac River at Shepherdstown, G. Ht - 1.55. Q. - 585. Wooden gage house erected at roof line of concrete house, new bridge and pier of former bridge destroyed March 1938 flood. Jefferson County, West Virgina. September 5, 1938. #1:/United States/h2op0163 ID. Water Supply Paper, 163 Geological Survey Water Resources reference marker tablets. United States. 1939 #1:/Tennessee/h2op0165 ID. Water Supply Paper, 165 Electrically operated portable reel and boom, first model constructed 1939. Photograph by Nashville office, U.S. Army Engineers. Tennessee. 1939. #1:/New Mexico/h2op0171 ID. Water Supply Paper, 171 Embudo Camp, Rio Arriba County, New Mexico. 1888. #1:/United States/h2op0181 ID. Water Supply Paper, 181 River measurement station show 1940 design of house and well. United States. 1940. #1:/United States, Water Supply Paper 888/h2op0182 ID. Water Supply Paper, 182 Type-A Wire-Weight Gage. Plate 2-A in U.S. Geological Survey Water Supply Paper 888. 1943. #1:/United States-Water Supply Paper 888/h2op0184 ID. Water Supply Paper, 184 Equipment used in boat measurements. Plate 5-B in U.S. Geological Survey. Water Supply Paper 888. 1943. #1:/Maryland-Water Supply Paper 888/h2op0185 ID. Water Supply Paper, 185 Wading measurement on Patuxent River near Burtonville, Montgomery County, Maryland. Plate 3-A in U.S. Geological Survey. Water Supply Paper 888. 1943. #1:/Vermont-Water Supply Paper/h2op0197 ID. Water Supply Paper, 197 Mendan road near Rutland, after flood of November 1927. Rutland County, Vermont. Plate 6-B in U.S. Geological Survey. Water Supply Paper 636. 1930. #1:/Colorado-Water Supply Paper 487/h2op0198 ID. Water Supply Paper, 198 Silt 18 inches deep deposited in front on Union Depot, Pueblo, Pueblo County, Colorado from the Arkansas River Flood of June3-5, 1921. Pueblo County, Colorado. Plate 5-A in U.S. Geological Survey. Water Supply Paper 487 1922. #1:/Texas-Water Supply Paper 796-A/h2op0200 ID. Water Supply Paper, 200 Hand-operated apparatus used to explore well in Kleberg County, Texas. Plate 7-B in U.S. Geological Survey Water Supply Paper 796-A. 1937. #1:/Flordia-Water Supply Paper 796-A/h2op0201 ID. Water Supply Paper, 201 Apparatus used to explore wells in Sarasota County, Flordia. Plate 5-B in U.S. Geological Survey Water Supply Paper 796-A. 1937. #1:/United States-Water Supply Paper 796-A/h2op0204 ID. Water Supply Paper, 204 Deep-well current meter (a) turbine wheel, (b) meter case with lower bearing (c) upper bearing with commutator head. Plate 2-A in U.S. Geological Survey Water Supply Paper 796-A. 1937. #1:/United States/h2op0205 ID. Water Supply Paper, 205 Deep-well current meter side view. Circa 1937. #1:/Colorado/h2op0212 ID. Water Supply Paper, 212 Crystal River near Redstone, Pitkin County, Colorado. October 1947. #1:/Colorado/h2op0217 ID. Water Supply Paper, 217 North Poudre Canal 300 feet below dam showing canal crossing the streams from which the water is taken. #1:/Wyoming /h2op0218 ID. Water Supply Paper, 218 Shoshone Dam: view of completed structure from right bank of river 1500 feet up stream. Shoshone Project. Park County, Wyoming. #1:/Colorado/h2op0226 ID. Water Supply Paper, 226 Stove Prairie Dam site in "Little Narrows" on Cache la Poudre River, 22 miles west of Fort Collins, Colorado. Looking down stream - winter. Photo by G.B. McFadden. Larimer County, Colorado. #1:/Colorado/h2op0227 ID. Water Supply Paper, 227 Stove Prairie Dam site, horizontal view, looking up stream. Cache la Poudre River, 22 miles west of Fort Collins. Photo by G.B. McFadden. Larimer County, Colorado. #1:/Colorado /h2op0228 ID. Water Supply Paper, 228 Stove Prairie Dam site on left, and looking down stream, shows bend in river at right hand end, and looking upstream. Height of dam 200 feet, capacity of reservoir 26,484 acre feet. Cache la Poudre River, 22 miles west of Fort Collins. Photo by G.B. McFadden. Larimer County, Colorado. #1:/Colorado-Bulletin 729/dca00131 ID. Davis, C.A. 131 Fossil vegetable matter of oil shale of Green River formation, from thin Sections, magnified 215 diameters. Rio Blanco County, Colorado. 1916. Plate 6-B in U.S. Geological Survey Bulletin 729. 1923. #1:/Colorado-Bulletin 730/lwt01262 ID. Lee, W.T. 1262 Rocky Mountain National Park, Colorado. Flattop Mountain, the type area of the Flattop peneplain. The gently inclined surface is at an altitude of about 12, 500 feet. In the distance to the left is the flat summit of Longs Peak; in the middle ground is the rounded summit of Hallett Peak, a monadnock, from the old peneplain; and in the distance to the right are tilted remnants of the same plain. Photo by F.W. Byerly. Plate 2-A in U.S. Geological Survey Bulletin 730. 1923. #1:/Colorado-Bulletin 730/lwt01275 ID. Lee, W.T. 1275 Thompson Canyon, a V-shaped valley of the canyon cycle of erosion in the lower end, cut in the upturned quartzite; looking downstream toward the Great Plains, in the distance is the "Red Beds" hogback of the foothills east of the mountains. Larimer County, Colorado. 1916. Plate 4-A in U.S. Geological Survey Bulletin 730. 1923. #1:/Tennessee-Bulletin 737/sgw01045 ID. Stose, G.W. 1045 East Fork mine workings, East Fork. Open cut on south side of spur, exposing carbonate ore. Sevier County, Tennessee. 1918. Plate 23-B in U.S. Geological Survey Bulletin 737. 1923. #1:/Tennessee-Bulletin 737/sgw01047 ID. Stose, G.W. 1047 East Fork mine workings, East Fork. Main open cut on north side of spur, where oxide ore was mined, and entrance to tunnel. Sevier County, Tennessee. 1918. Plate 23-A in U.S. Geological Survey Bulletin 737. 1923. #1:/Tennessee-Bulletin 737/sgw01051 ID. Stose, G.W. 1051 Large limestone pinnacles, residual from subsurface erosion, exposed in deep surface workings of Embree mine, Bumpass Cove. The ore bearing clays in solution depressions have been removed to a depth of 40 or 30 feet. Washington County, Tennessee. 1918. Plate 21-B in U.S. Geological Survey Bulletin 737. 1923. #1:/Tennessee-Bulletin 737/sgw01061 ID. Stose, G.W. 1061 Pit of McGuire mine, near Sweetwater; preparatory to driving tunnel in deeply disintegrated material to left of rock mass. Lewis County, Tennessee. 1918. Plate 25-A in U.S. Geological Survey Bulletin 737. 1923. #1:/Tennessee-Bulletin 737/sgw01062 ID. Stose, G.W. 1062 Unconformity at base of Tellico sandstone near opening of McGuire mine, dark sandy ribbed limestone unconformably overlying lighter colored roof bearing red calcareous mud rock at the top of the Holston marble. The sandy beds fill a channel between prominent white reefs of Bryozoa. Lewis County, Tennessee. 1918. Plate 25-B in U.S. Geological Survey Bulletin 737. 1923. #1:/Tennessee-Bulletin 737/sgw01063 ID. Stose, G.W. 1063 Unconformity at base of Tellico sandstone near opening of McGuire mine, general view of ledge, showing cross-bedded sandy-ribbed Tellico sandstone overlying reef bearing Holston marble. Lewis County, Tennessee. 1918. Plate 26-A in U.S. Geological Survey Bulletin 737. 1923. #1:/Tennessee-Bulletin 737/sgw01064 ID. Stose, G.W. 1064 Unconformity at base of Tellico sandstone near opening of McGuire mine, nearer view of overlapping beds, showing white Bryozoa reef in underlying calcareous mud rock of Holtson marble. Lewis County, Tennessee. 1918. Plate 26-B in U.S. Geological Survey Bulletin 737. 1923. #1:/Tennessee-Bulletin 737/sgw01066 ID. Stose, G.W. 1066 Hambright mine workings near Cleveland, north end of trench, where the ore bed curves to the right and deepest workings are located, showing vertical bed of solid ore in bottom of pit. Bradley County, Tennessee. 1918. Plate 29-B in U.S. Geological Survey Bulletin 737. 1923. #1:/Tennessee-Bulletin 737/sgw01067 ID. Stose, G.W. 1067 Hambright mine workings near Cleveland, general view of longitudinal trench, looking north showing piles of mined high grade lump ore. Bradley County, Tennessee. 1918. Plate 29-A in U.S. Geological Survey Bulletin 737. 1923. #1:/Tennessee-Bulletin 737/sgw01068 ID. Stose, G.W. 1068 North wall of main pit of Lord Mine, near Cleveland, lower part of wall, showing 6 inch ore bed at base of disintegrated Tellico sandstone. Bradley County, Tennessee. 1918. Plate 30-B in U.S. Geological Survey Bulletin 737. 1923. #1:/Tennessee-Bulletin 737/sgw01069 ID. Stose, G.W. 1069 North wall of main pit of Lord Mine, near Cleveland, upper part of wall showing sandy ribbed limestone of Tellico in pinnacle (at left), grading into disintegrated rock composed of red sandy clay, and manganese ore bed at bottom of exposure. Bradley County, Tennessee. 1918. Plate 30-A in U.S. Geological Survey Bulletin 737. 1923. #1:/Tennessee-Bulletin 737/sgw01071 ID. Stose, G.W. 1071 Unconformity between cross-bedded crystalline sandy limestone of the "Tellico" and underlying Holston marble in the pits of D.A.M. mine, sandy layers in the "Tellico" brought out in relief by weathering, and thin bed of psilomelane in marble just below the unconformity. Bradley County, Tennessee. 1918. Plate 13-A in U.S. Geological Survey Bulletin 737. 1923. #1:/Tennessee-Bulletin 737/sgw01073 ID. Stose, G.W. 1073 Unconformity between cross-bedded crystalline sandy limestone of the "Tellico" and underlying Holston marble in the pits of D.A.M. mine, solution cavities in the marble from which ore has been mined. Bradley County, Tennessee. 1918. Plate 13-B in U.S. Geological Survey Bulletin 737. 1923. #1:/Tennessee-Bulletin 737/sgw01079 ID. Stose, G.W. 1079 Pit of Silver Lake mine, in terraced gravel, large cobble and boulders taken from gravel are heaped in piles on the floor of the pit. Johnson County, Tennessee. 1918. Plate 17-A in U.S. Geological Survey Bulletin 737. 1923. #1:/Tennessee-Bulletin 737/sgw01083 ID. Stose, G.W. 1083 Hills composed of Watauga shale, the hills rise to uniform height and their flat tops form parts of an elevated old valley floor in the Doe Valley, Iron Mountain in the distance, view northwestward from a point on the road 1 mile north of Doe Valley mine. Johnson County, Tennessee 1918. Plate 17-B in U.S. Geological Survey Bulletin 737. 1923. #1:/Tennessee-Bulletin 737/sgw01084 ID. Stose, G.W. 1084 Open workings of Dry Run mine, near Butler, main pit at time of visit near top of the hill at left; older shallow workings at right; old tunnel at foot of hill to right of tipple. Johnson County, Tennessee 1918. Plate 21-A in U.S. Geological Survey Bulletin 737. 1923. #1:/Tennessee-Bulletin 737/sgw01085 ID. Stose, G.W. 1085 Irregular pit following mineralized sandy beds in decomposed Watauga shale, Elk mine, near Butler. Johnson County, Tennessee 1918. Plate 22-A in U.S. Geological Survey Bulletin 737. 1923. #1:/Tennessee-Bulletin 737/sgw01086 ID. Stose, G.W. 1086 Entrance to irregular pit showing hard unweathered folded Watauga shale in hanging wall. Elk mine, near Butler. Johnson County, Tennessee 1918. Plate 22-B in U.S. Geological Survey Bulletin 737. 1923. #1:/Tennessee-Bulletin 737/sgw01142 ID. Stose, G.W. 1142 Hambright mine near Cleveland, from hill to the east, showing large waste pile from recent excavation. Bradley County, Tennessee 1918. Plate 28-A in U.S. Geological Survey Bulletin 737. 1923. #1:/Tennessee-Bulletin 737/sgw01143 ID. Stose, G.W. 1143 Hambright mine near Cleveland, from the west showing wide trench recently excavated through the hill to the deeper workings on the east side. The hills in the valley all have about the same elevation and are parts of the old valley floor. Bradley County, Tennessee 1918. Plate 28-B in U.S. Geological Survey Bulletin 737. 1923. #1:/Virginia-Bulletin 737/sgw01411 ID. Stose, G.W. 1411 Pyrolusite and wad: Pyrolusite crystallized in plumrose form in narrow crevice in sandstone, natural size, from Mineral Ridge near Zepp Shenandoah County, Virginia. 1918. Plate 9-A in U.S. Geological Survey Bulletin 737. 1923. #1:/Virginia-Bulletin 737/sgw01412 ID. Stose, G.W. 1412 Crystalline manganite and pyrolusite: bladed tabular orthorhombic crystals of pyrolusite, from Powells Fort mine near Woodstock, Northampton County, Virginia. 1918. Plate 6- B in U.S. Geological Survey Bulletin 737. 1923. #1:/Virginia-Bulletin 737/sgw01415 ID. Stose, G.W. 1415 Psilomelane and manganite: Concentric layers of dense psilomelane (dark bands) and finely laminated lustrous manganite (lighter bands) shown on polished surfaces of four specimens from Compton mine near Compton: S : Sandstone. M manganite P psilomelane. The banding is in general parallel to the sandstone walls of the original crevices; crenulations are convex away from the walls and increase in size in this direction, indicating and mode of accretion. Two channels through which the solutions flowed connect the flow the inner layers with open crevice. Natural size. Page County, Virginia. 1918. Plate 8-A in U.S. Geological Survey Bulletin 737. 1923. #1:/Virginia-Bulletin 737/sgw01416 ID. Stose, G.W. 1416 Psilomelane and manganite: Concentric layers of dense psilomelane (dark bands) and finely laminated lustrous manganite (lighter bands) shown on polished surfaces of four specimens from Compton mine near Compton: S : Sandstone. M manganite P psilomelane. In B the fact that the dense psilomelane between the portion banded by manganite and sandstone walls is a replacement of the sandstone is shown by enclosed quartz grains at its border as in g. In C replacements of both sandstone walls of crevice by psilomelane is shown by quartz grains only. Natural size. Page County, Virginia. 1918. Plates 8-B and C in U.S. Geological Survey Bulletin 737. 1923. #1:/Virginia-Bulletin 737/sgw01417 ID. Stose, G.W. 1417 Psilomelane and manganite: Concentric layers of dense psilomelane (dark bands) and finely laminated lustrous manganite (lighter bands) shown on polished surfaces of four specimens from Compton mine near Compton: S : Sandstone. M manganite P psilomelane. D, shows densely concentrically banded psilomelane developing in psilomelane made granular by enclosure of numerous quartz grains (g) and some angular fragments of un altered sandstone 2 X Page County, Virginia. 1918. Plates 8-D in U.S. Geological Survey Bulletin 737. 1923. #1:/Alabama- Bulletin 737/sgw01418 ID. Stose, G.W. 1418 Manganite and psilomelane: Polished surface of concentrically banded dense psilomelane and associated crystalline manganite; soft structureless cores of pyrolusite or wad are surrounded by banded psilomelane, the inner layers of which are highly crinkled and in cavities and crevises of which there is crystalline manganite, from Cook mine, X 3, near Walnut Grove, Etowah County, Alabama. 1918. Plate 7-B in U.S. Geological Survey Bulletin 737. 1923. #1:/Tennessee Bulletin 737/sgw01419 ID. Stose, G.W. 1419 Manganite and psilomelane: Radiate illustrious fibrous manganite, commonly called "needle ore" surrounding a core of dense psilomelane, from Embree mine, natural size. Washington County, Tennessee. 1918. Plate 7-A in U.S. Geological Survey Bulletin 737. 1923. #1:/Virginia-Bulletin 737/sgw01422 ID. Stose, G.W. 1422 Crystalline manganite and pyrolusite: Crystalline manganite lining cavities in pitted psilomelane, from Bishop mine, Sugar Grove. Smyth County, Virginia. 1918. Plate 6- A in U.S. Geological Survey Bulletin 737. 1923. #1:/Virginia-Bulletin 737/sgw01423 ID. Stose, G.W. 1423 Crystalline manganite and pyrolusite: globular psilomelane nodules enclosed by crystalline manganite in which open cavities are lined with manganite crystals, from Powells Fort mine near Woodstock, Northampton County, Virginia. 1918. Plate 6- C in U.S. Geological Survey Bulletin 737. 1923. #1:/Tennessee-Bulletin 737/sgw01425 ID. Stose, G.W. 1425 Pyrolusite and wad: B, earthy compact wad traversed by a sigmoid band that is of similar composition but has a rod like comb structure and radiate arrangement (the wad apparently is the process of changing to a compact and rod like psilomelane), from Doe Valley mine. Johnson County, Tennessee 1918. Plate 9-B in U.S. Geological Survey Bulletin 737. 1923. #1:/Virginia-Bulletin 737/sgw01426 ID. Stose, G.W. 1426 Manganese ores: Polished section of a nodule of psilomelane showing irregular radial and concentric shrinkage cracks that have been filled by the deposition of harder finer-grained psilomelane having a highly polished surface (white in photo). The lamination of the original rock is preserved by impure bands in the psilomelane which replaced it. Bell mine near New Castle, Craig County, Virginia. 1918. Plate 5-B in U.S. Geological Survey Bulletin 737. 1923. #1:/Virginia-Bulletin 737/sgw01429 ID. Stose, G.W. 1429 Manganese ores: Section of nodule of psilomelane the interior of which has been broken into polygonal pyramids by radial shrinkage cracks from Mount Torry mine, near Basic. Waynesboro County, Virginia. 1918. Plate 5-A in U.S. Geological Survey Bulletin 737. 1923. #1:/Virginia-Bulletin 737/sgw01430 ID. Stose, G.W. 1430 Nodular psilomelane attached at base to a thin plate of ore; nipple shaped forms from Bell mine near Newcastle, Craig County, Virginia. 1918. Plate 4-A in U.S. Geological Survey Bulletin 737. 1923. #1:/Virginia-Bulletin 737/sgw01431 ID. Stose, G.W. 1431 Nodular psilomelane attached at base to a thin plate of ore; cauliflower like forms, which grew by replacement of the wall rock from the crevice in which the plate was formed, from Mount Torry mine, near Basic. Waynesboro County, Virginia. 1918. Plate 4-B in U.S. Geological Survey Bulletin 737. 1923. #1:/Tennessee-Bulletin 737/sgw01432 ID. Stose, G.W. 1432 Nodular psilomelane attached at base to a thin plate of ore; psilomelane nodules coated with brilliant red iron oxide enclosed in chert of Knox dolomite, which it has in part replaced, from Rutledge mine. Grainger County, Tennessee 1918. Plate 4-C in U.S. Geological Survey Bulletin 737. 1923. #1:/Tennessee-Bulletin 737/sgw01434 ID. Stose, G.W. 1434 Nodular psilomelane in botryoidal clusters, large elongate cluster called "grape ore" from Shouns prospect near Mountain City Johnson County, Tennessee 1918. Plate 2 (left) in U.S. Geological Survey Bulletin 737. 1923. #1:/Virginia-Bulletin 737/sgw1434a ID. Stose, G.W. 1434a Nodular psilomelane in botryoidal clusters, small rounded cluster from Mineral Ridge mine near Zepp. Shenandoah County, Virginia. 1918. Plate 2 (right) in U.S. Geological Survey Bulletin 737. 1923. #1:/Tennessee-Bulletin 737/sgw01436 ID. Stose, G.W. 1436 Rodlike forms of psilomelane; radiate cluster of smooth rods, some of which are hollow, from Dry Run mine, natural size. Johnson County, Tennessee 1918. Plate 3-A in U.S. Geological Survey Bulletin 737. 1923. #1:/Virginia-Bulletin 737/sgw01438 ID. Stose, G.W. 1438 Rodlike forms of psilomelane; radiate cluster of solid rods from Seller mine, X 2. Smyth County, Virginia. 1918. Plate 3-B in U.S. Geological Survey Bulletin 737. 1923. #1:/Virginia-Bulletin 737/sgw01439 ID. Stose, G.W. 1439 Rodlike forms of psilomelane; irregular branching cluster from Mount Torry mine. Waynesboro County, Virginia. 1918. Plate 3-C in U.S. Geological Survey Bulletin 737. 1923. #1:/Virginia-Bulletin 737/sgw01440 ID. Stose, G.W. 1440 Rodlike forms of psilomelane; single tapering rod resembling a stalactite, Mount Torry Mine. Waynesboro County, Virginia. 1918. Plate 3-D in U.S. Geological Survey Bulletin 737. 1923. #1:/Tennessee-Bulletin 737/sgw01444 ID. Stose, G.W. 1444 Cellular psilomelane made up of nodded walls that may former have been crevice fillings in rock that has since be dissolved. Natural size. From Elk mine. Johnson County, Tennessee 1918. Plate 20-A in U.S. Geological Survey Bulletin 737. 1923. #1:/Tennessee-Bulletin 737/sgw01445 ID. Stose, G.W. 1445 Psilomelane replacement of sandstone: The rounded knobby rods in part replace the sandstone wall. Rods arranged in comb structure perpendicular to the walls of the crevice X2, from Doe Valley mine in Watauga shale, Johnson County, Tennessee 1918. Plate 12-A in U.S. Geological Survey Bulletin 737. 1923. #1:/Tennessee-Bulletin 737/sgw01446 ID. Stose, G.W. 1446 Psilomelane replacement of sandstone: The rounded knobby rods in part replace the sandstone wall. Rods arranged in miter form at the junction of the bedding plane of the sandstone and a perpendicular joint, natural size, from Doe Valley mine in Watauga shale, Johnson County, Tennessee 1918. Plate 12-B in U.S. Geological Survey Bulletin 737. 1923. #1:/Tennessee-Bulletin 737/sgw01447 ID. Stose, G.W. 1447 Psilomelane replacement of sandstone: The rounded knobby rods in part replace the sandstone wall, partial replacement of sandstone resembling cemented breccia, X 1.5. Doe Valley mine in Watauga shale, Johnson County, Tennessee 1918. Plate 12-C in U.S. Geological Survey Bulletin 737. 1923. #1:/Tennessee-Bulletin 737/sgw01448 ID. Stose, G.W. 1448 Scattered detached plumose nodules of shiny manganite with a core of soft pyrolusite, embedded in crystalline quartz, shown on polished surfaces X 2; rounded cross section of nodules, from shaft of Wilson Hill mine, near Neva Johnson County, Tennessee 1918. Plate 18-A in U.S. Geological Survey Bulletin 737. 1923. #1:/Tennessee-Bulletin 737/sgw01449 ID. Stose, G.W. 1449 Scattered detached plumose nodules of shiny manganite with a core of soft pyrolusite, embedded in crystalline quartz, shown on polished surfaces X 2; longitudinal sections showing dendritic or plumose structure, from shaft of Wilson Hill mine, near Neva Johnson County, Tennessee 1918. Plate 18-B in U.S. Geological Survey Bulletin 737. 1923. #1:/Virginia-Bulletin 737/sgw01451 ID. Stose, G.W. 1451 Feathery phantoms of manganese oxide in chalcedony: shown on polished surfaces; longitudinal sections of phantoms in translucent chalcedony, from Thompson Hollow, 10 miles southwest of Front Royal, X 2. Warren County, Virginia. 1918. Plate 19-A in U.S. Geological Survey Bulletin 737. 1923. #1:/Virginia-Bulletin 737/sgw01452 ID. Stose, G.W. 1452 Feathery phantoms of manganese oxide in chalcedony: shown on polished surfaces; Cross sections of plate 19-A, from Thompson Hollow, 10 miles southwest of Front Royal, X 2. Warren County, Virginia. 1918. Plate 19-B in U.S. Geological Survey Bulletin 737. 1923. #1:/Virginia-Bulletin 737/sgw01453 ID. Stose, G.W. 1453 Feathery phantoms of manganese oxide in chalcedony: shown on polished surfaces; Cross sections of the opaque chalcedony cells that enclose the phantoms shown in plate 19-B, from Thompson Hollow, 10 miles southwest of Front Royal, X 2. Warren County, Virginia. 1918. Plate 19-C in U.S. Geological Survey Bulletin 737. 1923. #1:/Virginia-Bulletin 737/sgw01454 ID. Stose, G.W. 1454 Photomicrograph of longitudinal section of feathery manganese oxide phantoms in translucent chalcedony, surrounded by opaque banded chalcedony, from Thompson Hollow, 10 miles southwest of Front Royal, X 2. Warren County, Virginia. 1918. Plate 20-B in U.S. Geological Survey Bulletin 737. 1923. #1:/Tennessee-Bulletin 737/sgw01456 ID. Stose, G.W. 1456 "Birdshot" pebble ore, consisting of shiny black pellets of manganese oxide in clay, from Louisville mine, natural size. Blount County, Tennessee 1918. Plate 15-A in U.S. Geological Survey Bulletin 737. 1923. #1:/Tennessee-Bulletin 737/sgw01457 ID. Stose, G.W. 1457 Ferruginous pebble bed in fossiliferous crystalline limestone near the top of the Holston marble, showing pebbles composed largely of fragments of fossils partly replaced by iron and having a highly polished surface, from Heiskell mine. Monroe County, Tennessee 1918. Plate 15-B in U.S. Geological Survey Bulletin 737. 1923. #1:/Tennessee-Bulletin 737/sgw01460 ID. Stose, G.W. 1460 Casts and molds of fossils in iron ore associated with the manganese ore that has replaced fossiliferous siliceous limestone beds in the "Tellico sandstone", weathered bedding surface, showing numerous fragments of Bryozoa and a few brachiopod shells, from Hambright mine southwest of Cleveland, Bradley County, Tennessee 1918. Plate 14-B in U.S. Geological Survey Bulletin 737. 1923. #1:/Tennessee-Bulletin 737/sgw01462 ID. Stose, G.W. 1462 Casts and molds of fossils in iron ore associated with the manganese ore that has replaced fossiliferous siliceous limestone beds in the "Tellico sandstone", fracture surface showing longitudinal and cross sections of crinoid stems and Bryozoa, from Hambright mine southwest of Cleveland, Bradley County, Tennessee 1918. Plate 14-A in U.S. Geological Survey Bulletin 737. 1923. #1:/Tennessee-Bulletin 737/sgw01464 ID. Stose, G.W. 1464 Manganese ores: Two varieties of psilomelane in ore replacing chert shown on polished surface; Brown iron stained chert, band of highly polished hard dense psilomelane (black in photo), slightly softer less homogeneous gray psilomelane. From Groundhog prospect, Monroe County, Tennessee 1918. Plate 5-C in U.S. Geological Survey Bulletin 737. 1923. #1:/Virginia-Bulletin 737/sgw01465 ID. Stose, G.W. 1465 Manganese ores: Ferruginous manganese ore, a mixture of nodular psilomelane (darker parts) and rust-coated manganiferous iron. From Mount Torry Mine. Waynesboro County, Virginia. 1918. Plate 5-D in U.S. Geological Survey Bulletin 737. 1923. #1:/Tennessee-Bulletin 737/sgw01467 ID. Stose, G.W. 1467 Manganese carbonate ore: Polished surface showing white crystalline mass with some separate rhombic carbonate crystals and dark concentrically banded carbonate ore, also a thin layer of black oxide having a somewhat brassy metallic luster at or near the contact of two rocks, from East Fork mine, east Sevierville. Sevier County, Tennessee. 1918. Plate 10-A in U.S. Geological Survey Bulletin 737. 1923. #1:/Tennessee-Bulletin 737/sgw01469 ID. Stose, G.W. 1469 Manganese carbonate ore: photomicrograph showing concentric zonal structure in rhombic crystals in which marginal portions seem to contain less manganese than the dark centers and to be chiefly dolomite, X 10. from East Fork mine, east Sevierville. Sevier County, Tennessee. 1918. Plate 10-B in U.S. Geological Survey Bulletin 737. 1923. #1:/Tennessee-Bulletin 737/sgw01471 ID. Stose, G.W. 1471 Residual clay containing manganese oxide: Residual clay of Shady dolomite banded by incipient impregnation of manganese oxide along thin crenulated porous layers, also showing dendritic incipient replacement of clay border these layers, natural size, from Winter mine, Carter County, Tennessee. 1918. Plate 11-A in U.S. Geological Survey Bulletin 737. 1923. #1:/Tennessee-Bulletin 737/sgw01472 ID. Stose, G.W. 1472 Residual clay containing manganese oxide: Manganese oxide segregated into dark specks and incipient nodules of psilomelane replacing residual clay of Knox dolomite, from Rutledge mine, near Rutledge. Grainger County, Tennessee. 1918. Plate 11-B in U.S. Geological Survey Bulletin 737. 1923. #1:/Grand Teton National Park/gdl00356 ID. Gaskill, D.L. 356ct Grand Teton National Park. View to southeast from Lake Solitude. Teton County. Wyoming. July 1951. #1:/Grand Teton National Park/gdl00357 ID. Gaskill, D.L. 357ct Grand Teton National Park. Peak 10,851 feet, Peterson Glacier, Grand Teton. View to south about Mica Lake. Teton County. Wyoming. July 1951. #1:/Grand Teton National Park/gdl00358 ID. Gaskill, D.L. 358ct Grand Teton National Park. Teewinot (?), Mt Owen, Grand Teton. View to southeast from peak. 10,636 feet above Mica Lake. Teton County. Wyoming. July 1951. #1:/Grand Teton National Park/gdl00359 ID. Gaskill, D.L. 359ct Grand Teton National Park. Mt Owen, Grand Teton. View to southeast over Lake Solitude. Teton County. Wyoming. July 1951. #1:/Grand Teton National Park/gdl00360 ID. Gaskill, D.L. 360ct Grand Teton National Park. View southeast over Lake Solitude. Teton County. Wyoming. July 1951. #1:/Grand Teton National Park/gdl00361 ID. Gaskill, D.L. 361ct Grand Teton National Park. Grand Teton. View to southwest. Teton County. Wyoming. July 1974. #1:/Grand Teton National Park/gdl00362 ID. Gaskill, D.L. 362ct Grand Teton National Park. View to northwest towards Teton Range. Teton County. Wyoming. 1958. #1:/Grand Teton National Park/gdl00363 ID. Gaskill, D.L. 363ct Grand Teton National Park. Teton Range. View to northwest from hills overlooking the National Elk Refuge near Jackson. Teton County. Wyoming. 1966. #1:/Grand Teton National Park/gdl00364 ID. Gaskill, D.L. 364ct Grand Teton National Park. View east-southeast down Garnet Canyon towards Bradley Lake. Teton County. Wyoming. August 1966. #1:/Grand Teton National Park/gdl00365 ID. Gaskill, D.L. 365ct Grand Teton National Park. Bradley Lake. View to southeast. Teton County. Wyoming. August 1966. #1:/Grand Teton National Park/gdl00366 ID. Gaskill, D.L. 366ct Grand Teton National Park. View to northeast over Jackson Lake, near summit of Grand Teton. Teton County. Wyoming. August 1966. #1:/Grand Teton National Park/gdl00367 ID. Gaskill, D.L. 367ct Grand Teton National Park. Battleship Mountain. View to southwest from Grand Teton over glacier on northwest side of the Middle Teton. Teton County. Wyoming. August 1966. #1:/Grand Teton National Park/gdl00368 ID. Gaskill, D.L. 368ct Grand Teton National Park. View to south-southwest from the Grand Teton. Teton County. Wyoming. August 1966. #1:/Grand Teton National Park/gdl00369 ID. Gaskill, D.L. 369ct Grand Teton National Park. Grand Teton. Teton Glacier. Teton County. Wyoming. September 1966. #1:/Grand Teton National Park/gdl00370 ID. Gaskill, D.L. 370ct Grand Teton National Park. Grand Teton 13,770 feet. Delta Lake 9,000 feet. Grand Teton, Teton Glacier moraines from Delta Lake. Teton County. Wyoming. ca. September 1966. #1:/Grand Teton National Park/gdl00371 ID. Gaskill, D.L. 371ct Grand Teton National Park. Middle Teton. View to south over Middle Teton Glacier. Teton County. Wyoming. September 1966. #1:/Grand Teton National Park/gdl00372 ID. Gaskill, D.L. 372ct Grand Teton National Park. Mt. Meek, Battleship Mountain (Butte). View to southwest from near summit of Grand Teton. Teton County. Wyoming. August 1966. #1:/Grand Teton National Park/gdl00373 ID. Gaskill, D.L. 373ct Grand Teton National Park. Mt. Moran. View north-northeast from the Grand Teton. Teton County. Wyoming. August 1966. #1:/Grand Teton National Park/gdl00374 ID. Gaskill, D.L. 374ct Grand Teton National Park. View to south. Middle Teton glacier from Grand Teton. Teton County. Wyoming. August 1966. #1:/Grand Teton National Park/gdl00375 ID. Gaskill, D.L. 375ct Grand Teton National Park. Nez Perce Peak, Middle Teton. View west up Garnet Canyon. Teton County. Wyoming. 1966. #1:/Gaskill Collection/gdl00376 ID. Gaskill, D.L. 376ct View west northwest. Atlantic Peak, West Atlantic Peak. Atlantic Lake, Wind River Range. Popa Agie Wilderness. Fremont County, Wyoming, 1970. #1:/Gaskill Collection/gdl00377 ID. Gaskill, D.L. 377ct Atlantic Creek. Wind River Mountains, Atlantic Peak ( 12,700 feet). Christina Lake quadrangle. Fremont County, Wyoming, September 1970. #1:/Gaskill Collection/gdl00378 ID. Gaskill, D.L. 378ct View West. Atlantic Peak. Atlantic Peak-Atlantic Lake, Wind Rivers. Wind River Mountains. Fremont County, Wyoming, September 1970. #1:/Gaskill Collection/gdl00379 ID. Gaskill, D.L. 379ct Atlantic Creek. Atlantic Peak ascent. Fremont County, Wyoming, September 1970. #1:/Gaskill Collection/gdl00380 ID. Gaskill, D.L. 380ct Mt. Bonneville. View to northeast from Raid Peak. Wind River Mountains. Sublette County, Wyoming, 1980. #1:/Gaskill Collection/gdl00381 ID. Gaskill, D.L. 381ct View north from Raid Peak, Wind River Mountains, Mt Bonneville 15 min. quadrangle. Bridger Wilderness Sublette County, Wyoming, 1980. #1:/Gaskill Collection/gdl00382 ID. Gaskill, D.L. 382ct View north from Raid Peak over Lake 10,828. Bridger Wilderness, Mt Bonneville 15 min. quadrangle. Wind River Range. Sublette County, Wyoming, 1980. #1:/Gaskill Collection/gdl00383 ID. Gaskill, D.L. 383ct Mt Bonneville, Raid Peak. View east northeast from South Fork Boulder Creek at about 9,900 feet elevation. Bridger Wilderness, Wind River Mountains. Sublette County, Wyoming, 1980. #1:/Gaskill Collection/gdl00384 ID. Gaskill, D.L. 384ct View south southeast from Raid Peak in Mt. Bonneville 15 min quadrangle, Wind River Mountains. Bridger Wilderness. Sublette County, Wyoming, 1980. #1:/Gaskill Collection/gdl00385 ID. Gaskill, D.L. 385ct Mt. Bonneville. View east in the Mt. Bonneville 15 min quadrangle. Bridger Wilderness, Wind River Mountains. Unnamed lake below Lake, 10521 on Boulder Creek. Sublette County, Wyoming, 1980. #1:/Gaskill Collection/gdl00386 ID. Gaskill, D.L. 386ct View south southeast from Raid Peak Lakes at head of East Fork River, Wind River Mountains. Sublette County, Wyoming, 1980. #1:/Gaskill Collection/gdl00387 ID. Gaskill, D.L. 387ct View north over Rainbow Lake, Bridger Wilderness, Wind River Mountains, Mt Bonneville 15 min. quadrangle. Sublette County, Wyoming, 1980. #1:/Gaskill Collection/gdl00388 ID. Gaskill, D.L. 388ct View southeast over Dinwoody Glacier toward Sunbeam and Turret Peaks. Gannet Peak and Fremont Peak north quadrangle, Wind River Range. Fremont County, Wyoming, August 1984. #1:/Gaskill Collection/gdl00389 ID. Gaskill, D.L. 389ct Bridger Wilderness. Mt Bonneville. This lake just below Lake 10,521. View east up the Boulder Creek gorge in the Mt. Bonneville 15 min quadrangle. Wind River Mountains. Sublette County, Wyoming, 1980. #1:/Gaskill Collection/gdl00390 ID. Gaskill, D.L. 390ct View south southeast from Raid Peak, over lakes at head of East Fork River, Bridger Wilderness, Wind River Range. Sublette County, Wyoming, September 1980. #1:/Gaskill Collection/gdl00391 ID. Gaskill, D.L. 391ct Mt Lander, Mt Bonneville. View northeast over Raid Lake towards Mt. Bonneville in the Bonneville 15 min quadrangle. Wind River Mountains, Bridger wilderness. Sublette County, Wyoming, September 1980. #1:/Gaskill Collection/gdl00392 ID. Gaskill, D.L. 392ct Mt. W. Wilson. View north over Island Lake. Bridger Lakes quadrangle. Sublette County, Wyoming, n.d. #1:/Gaskill Collection/gdl00393 ID. Gaskill, D.L. 393ct Fremont Peak. View north northeast over Seneca Lake, Wind River Mountains. Sublette County, Wyoming, n.d. #1:/Gaskill Collection/gdl00394 ID. Gaskill, D.L. 394ct Wind River Range Glacier Wilderness, Wyoming. Doublet Peak, Skyline Peak. View south southeast from Gooseneck Pinnacle ridge, Grannet Peak quadrangle. Fremont County, Wyoming, August 1984. #1:/Gaskill Collection/gdl00395 ID. Gaskill, D.L. 395ct Turret Peak, Mt. Warren, doublet Peak. View south southeast over Dinwoody Glacier. Gannet Peak quadrangle. Fremont County, Wyoming, August 1984. #1:/Gaskill Collection/gdl00396 ID. Gaskill, D.L. 396ct Big Sandy River, Warbonnet Peak. Wind River Mountains, Bridger Wilderness. Sublette County, Wyoming, August 1974. #1:/Gaskill Collection/gdl00397 ID. Gaskill, D.L. 397ct Big Sandy River Valley. Lake below Big Sandy Lake. Wind River. Bridger Wilderness, Temple Peak 7 1/2 min. quadrangle. Sublette County, Wyoming, n.d. #1:/Gaskill Collection/gdl00398 ID. Gaskill, D.L. 398ct Peak 12,088 feet Wind River Range, Bridger Wilderness. View north on beach east of little Sandy Creek at 10,400 feet in Temple Peak quadrangle. Sublette County, Wyoming, 1971. #1:/Grand Teton National Park/gdl00399 ID. Gaskill, D.L. 399ct Grand Teton National Park. Grand Teton. View to northwest from Cottonwood Creek. Teton County, Wyoming, August 1966. #1:/Gaskill Collection/gdl00400 ID. Gaskill, D.L. 400ct Temple Peak. Big Sandy Lake, Wind River Mountains. Bridger Wilderness. Temple Peak quadrangle. View to southeast. Sublette County, Wyoming, n.d. #1:/Gaskill Collection/gdl00401 ID. Gaskill, D.L. 401ct Temple Peak. Mossason Lake 15 min quadrangle. View to southeast south of Jackass Pass. Jackass Pass Trail. Bridger Wilderness. Sublette County, Wyoming, July 3, 1974. #1:/Gaskill Collection/gdl00402 ID. Gaskill, D.L. 402ct Pingora, Wind River Range. Cirque of the Towers from Jackass Pass. Popa Agie Wilderness. Fremont County, Wyoming, July 3, 1974. #1:/Gaskill Collection/gdl00403 ID. Gaskill, D.L. 403ct Big Sandy, Wind River Range, Warbonnet Peak/Bridger Wilderness. Fremont County, Wyoming, July 3, 1974. #1:/Gaskill Collection/gdl00404 ID. Gaskill, D.L. 404ct Cirque of the Towers from Jackass Pass, Wind River Mountains. View north from Jackass Pass. Moccasin Lake 15min. quadrangle. Popo Agie Wilderness. Fremont County, Wyoming, July 3, 1974. #1:/Gaskill Collection/gdl00405 ID. Gaskill, D.L. 405ct First Lake below Big Sandy Lake. Temple Peak quadrangle. Big Sandy below Big Sandy Lake. Wind River Range, Bridger Wilderness. Sublette County, Wyoming, July 1974. #1:/Gaskill Collection/gdl00406 ID. Gaskill, D.L. 406ct East Temple, Temple. View to southeast from Jackass Pass trail, Wind River Mountains. Bridger Wilderness. Temple Peak quadrangle. Sublette County, Wyoming, July 3,1974. #1:/Gaskill Collection/gdl00407 ID. Gaskill, D.L. 407ct Big Sandy River. Wind River Mountains. Temple Peak quadrangle. Bridger Wilderness. Sublette County, Wyoming, n.d. #1:/Gaskill Collection/gdl00408 ID. Gaskill, D.L. 408ct Warbonnet Peak, View up Big Sandy River to northeast. Wind River Range. Temple Peak 7 1/2 min. quadrangle. Bridger Wilderness. Sublette County, Wyoming, July 3, 1974. #1:/Gaskill Collection/gdl00409 ID. Gaskill, D.L. 409ct Big Sandy River, Wind River Mountains. Bridger Wilderness. Sublette County, Wyoming, 1974. #1:/Gaskill Collection/gdl00410 ID. Gaskill, D.L. 410ct View north northeast, Bridger Lakes quadrangle. Fremont Peak, Jackson Peak, Island Lake. Sublette County, Wyoming, September 1966. #1:/Gaskill Collection/gdl00411 ID. Gaskill, D.L. 411ct Mt. W. Wilson (?) Saceqewa Peak. View north northeast in Bridger Lakes quadrangle along Island Lake trail. Wind River Range. Sublette County, Wyoming, n.d. #1:/Gaskill Collection/gdl00412 ID. Gaskill, D.L. 412ct American Legion Peak View northwest from Fremont Peak. Titcomb Lakes-Summer Ice Lake from Fremonth Peak, South quadrangle into Gannet Peak quadrangle. Sublette County, Wyoming, September 1966. #1:/Gaskill Collection/gdl00413 ID. Gaskill, D.L. 413ct View north in Bridger Lakes quadrangle. Mt. W. Wilson (?), Fremont Peak. Island Lake. Wind River Range. Fremonth County, Wyoming, 1966. #1:/Gaskill Collection/gdl00414 ID. Gaskill, D.L. 414ct View over Island Lake, up the Titcomb Lakes valley. Mt. Helen. Bridger Lakes quadrangle. Island Lake, Wind River. View north, Wind River Range. Sublette County, Wyoming, 1966. #1:/Gaskill Collection/gdl00415 ID. Gaskill, D.L. 415ct View north northeast from Seneca Lake. Bridgers Lakes quadrangle. In the Bridger Wilderness. Fremont Peak, Jackson Peak. Seneca Lake. Wind River Range. Sublette County, Wyoming, September 1966. #1:/Gaskill Collection/gdl00416 ID. Gaskill, D.L. 416ct Spire. Cow Creek. Soap Creek Ridge. Gunnison County, Colorado. n.d. #1:/Gaskill Collection/gdl00417 ID. Gaskill, D.L. 417ct View south from Pearson Peak. Little Soap Park quadrangle. Gunnison County, Colorado. n.d. #1:/Gaskill Collection/gdl00418 ID. Gaskill, D.L. 418ct View north along ridge west of Little Soap Park. Gunnison County, Colorado. n.d. #1:/Gaskill Collection/gdl00419 ID. Gaskill, D.L. 419ct View north along west side of Little Soap Park. Gunnison County, Colorado. n.d. #1:/Gaskill Collection/gdl00420 ID. Gaskill, D.L. 420ct View northeast across Little Soap Park. Gunnison County, Colorado. n.d. #1:/Gaskill Collection/gdl00421 ID. Gaskill, D.L. 421ct View north northeast across Little Soap Park. Gunnison County, Colorado. n.d. #1:/Gaskill Collection/gdl01000 ID. Gaskill, D.L. 1000 South Park. View northeast from Highway 285 about 10 miles south of Fairplay. Park County. Colorado, August 1999. #1:/Gaskill Collection/gdl01001 ID. Gaskill, D.L. 1001 South Park. View to southeast from Highway 285 about 8 miles south of Fairplay. Park County. Colorado. August 1999. #1:/Gaskill Collection/gdl01002 ID. Gaskill, D.L. 1002 South Park. View from Boreas Pass Road. Park County. Colorado, August 1999. #1:/Gaskill Collection/gdl01003 ID. Gaskill, D.L. 1003 South Park. View east southeast from Boreas Pass Road. Park County. Colorado, October 1999. #1:/Gaskill Collection/gdl01004 ID. Gaskill, D.L. 1004 South Park. View west from west side of Boreas Pass Road. Summit County. Colorado, October 1999. #1:/Gaskill Collection/gdl01005 ID. Gaskill, D.L. 1005 From above Crystal Lake. Hoosier Pass view toward Baldy Mountain. South Park. View west from west side of Boreas Pass Road. Summit County. Colorado, August 1954. #1:/Gaskill Collection/gdl01006 ID. Gaskill, D.L. 1006 View to west of Mt. Yale from the Colorado Trail. Silver Creek Valley. Chaffee County. Colorado, August 1999. #1:/Gaskill Collection/gdl01007 ID. Gaskill, D.L. 1007 Intertwining Mancos shale and Mesa Verde Formation. White River. Rangely. Rio Blanco County. Colorado, August 1959. #1:/Gaskill Collection/gdl01008 ID. Gaskill, D.L. 1008 Wheeler Geologic Area. Mineral County. Colorado, August 1990. #1:/Gaskill Collection/gdl01009 ID. Gaskill, D.L. 1009 Wheeler Geologic Area. Creede 15 minute quad. Mineral County. Colorado, August 1990. #1:/Gaskill Collection/gdl01010 ID. Gaskill, D.L. 1010 Guanella Pass view east. Peak on the left Mt. Spalding. Peak on the right is Mt. Bierstadt. Clear Creek County. Colorado, August 1999. #1:/Gaskill Collection/gdl01011 ID. Gaskill, D.L. 1011 Grand Mesa. Delta County. Colorado, October 1962. #1:/Gaskill Collection/gdl01012 ID. Gaskill, D.L. 1012 Wheeler Geologic Area. Mineral County. Colorado, 1990. #1:/Gaskill Collection/gdl01013 ID. Gaskill, D.L. 1013 Wheeler Geologic Area. Mineral County. Colorado, August 1990. #1:/Gaskill Collection/gdl01014 ID. Gaskill, D.L. 1014 View to north northeast from juntion of Taryall Creek and Hay creek ? Tarryall Mountains. Park County. Colorado, September 1981. #1:/Gaskill Collection/gdl01015 ID. Gaskill, D.L. 1015 View to northeast from Tarryall Creek Valley. Bison and McCurdy Mountains (?). Park County. Colorado, September 1981. #1:/Gaskill Collection/gdl01016 ID. Gaskill, D.L. 1016 Lake Fork of Gunnison River about 12+ miles north of Lake City. Gunnison County. Colorado, August 1999. #1:/Gaskill Collection/gdl01017 ID. Gaskill, D.L. 1017 Mt Siverheads from Boreas Pass Road. Park County. Colorado, October 1999. #1:/Mount Pinatubo, Philippines, June 1991/ctj00001 ID. Casadevall, T.J. 1 Mount Pinatubo, Philippines. Aerial view looking south of north flank of Pinatubo showing area devastated by April 2 explosions. Road in foreground provided access to geothermal drill stations. USGS photo by C.G. Newhall. Late-April, 1991. #1:/Mount Pinatubo, Philippines, June 1991/ctj00002 ID. Casadevall, T.J. 2 Mount Pinatubo, Philippines. Aerial view of April 2 explosion craters. USGS photo by C.G. Newhall. Late-April, 1991. #1:/Mount Pinatubo, Philippines, June 1991/ctj00003 ID. Casadevall, T.J. 3 Mount Pinatubo, Philippines. View of April 2 explosion craters. USAF photo by R. Batalon. USGS photo. Late-April, 1991. #1:/Mount Pinatubo, Philippines, June 1991/ctj00004 ID. Casadevall, T.J. 4 Mount Pinatubo, Philippines. View of geologists examining deposits on rim of April 2 explosion crater (PHIVOLCS geologist Bella Tubianosa and USGS geologist Chris Newhall). USGS photo. Late-April, 1991. #1:/Mount Pinatubo, Philippines, June 1991/ctj00007 ID. Casadevall, T.J. 7 Mount Pinatubo, Philippines. View to west from Clark Air Base of major eruption of Pinatubo. USAF photo by Robert Lapointe. June 15, 1991. #1:/Mount Pinatubo, Philippines, June 1991/ctj00008 ID. Casadevall, T.J. 8 Mount Pinatubo, Philippines, June 16, 1991. View of ash from June 15 eruption on automobiles at Clark Air Base. USGS photo by R. P. Hoblitt. #1:/Mount Pinatubo, Philippines, June 1991/ctj00009 ID. Casadevall, T.J. 9 Mount Pinatubo, Philippines. Aerial view of north side of Pinatubo crater with small explosion in progress. Crater diameter is approximately 2 km. USAF photo by R. Batalon. June 22, 1991. #1:/Mount Pinatubo, Philippines, June 1991/ctj00010 ID. Casadevall, T.J. 10 Mount Pinatubo, Philippines. Aerial view of northeast side of Pinatubo showing valley filling pyroclastic deposits from June 15 eruption. USGS photo by R. P. Hoblitt. June 22, 1991. #1:/Mount Pinatubo, Philippines, June 1991/ctj00011 ID. Casadevall, T.J. 11 Mount Pinatubo, Philippines. View to west of Pinatubo volcano from control tower, Clark Air Base. USGS photo by T. J. Casadevall. August 1, 1991. #1:/Mount Pinatubo, Philippines, June 1991/ctj00012 ID. Casadevall, T.J. 12 Mount Pinatubo, Philippines. Aerial view to south of Pinatubo crater. Crater diameter is approximately 2 km. White plumes are fumaroles on crater floor. USGS photo by T. J. Casadevall. August 1, 1991. #1:/Mount Pinatubo, Philippines, June 1991/ctj00013 ID. Casadevall, T.J. 13 Mount Pinatubo, Philippines. Aerial view to south of Pinatubo crater showing start of small explosion. USGS photo by T. J. Casadevall. August 1, 1991. #1:/Mount Pinatubo, Philippines, June 1991/ctj00014 ID. Casadevall, T.J. 14 Mount Pinatubo, Philippines. Aerial view to south of Pinatubo crater showing crater lake. USGS photo by T. C. Pierson. September 10, 1991. #1:/Mount Pinatubo, Philippines, June 1991/ctj00015 ID. Casadevall, T.J. 15 Mount Pinatubo, Philippines. View of World Airways DC-10 airplane setting on its tail because of weight of June 15, 1991 ash. Cubi Point Naval Air Station. USN photo by R. L. Rieger. June 17, 1991. #1:/Mount Pinatubo, Philippines, June 1991/ctj00016 ID. Casadevall, T.J. 16 Mount Pinatubo, Philippines. Aerial view of collapsed warehouse, Clark Air Base. USAF photo by R. Batalon. June 22, 1991. #1:/Mount Pinatubo, Philippines, June 1991/ctj00017 ID. Casadevall, T.J. 17 Mount Pinatubo, Philippines. View of collapsed roof in public market, Olangapo city. USGS photo by T. J. Casadevall. August 3, 1991. #1:/Mount Pinatubo, Philippines, June 1991/ctj00018 ID. Casadevall, T.J. 18 Mount Pinatubo, Philippines. View of patio area, Officer's Club, Clark Air Base. USGS photo by T. J. Casadevall. July 31, 1991. #1:/Mount Pinatubo, Philippines, June 1991/ctj00019 ID. Casadevall, T.J. 19 Mount Pinatubo, Philippines. View of native house on flanks of Pinatubo. USGS photo by R. P. Hoblitt. June 28, 1991. #1:/Mount Pinatubo, Philippines, June 1991/ctj00020 ID. Casadevall, T.J. 20 Mount Pinatubo, Philippines. Aerial view of resettlement camp for victims of Pinatubo eruption. USGS photo by T. J. Casadevall. August 12, 1991. #1:/Mount Pinatubo, Philippines, June 1991/ctj00021 ID. Casadevall, T.J. 21 Mount Pinatubo, Philippines. Aerial view of Sacobia river drainage. Valley was filled by June 15 deposits and is now being partially reworked by mudflows. Steam rises from the still-hot interiors of June 15 deposits. USGS photo by T. J. Casadevall. August 15, 1991. #1:/Mount Pinatubo, Philippines, June 1991/ctj00023 ID. Casadevall, T.J. 23 Mount Pinatubo, Philippines. View of hot mudflow (lahar) in Sacobia valley below Mactan gate of Clark Air Base. USGS scientists A. Miklius, R. White, and K. Scott observe mudflow. USGS photo by T. J. Casadevall. August 4, 1991. #1:/Mount Pinatubo, Philippines, June 1991/ctj00024 ID. Casadevall, T.J. 24 Mount Pinatubo, Philippines. Aerial view of Abacan river channel as it passes through Angeles city near Clark Air Base. Mudflow associated with June 15 eruption casued collapse of main bridges across the Abacan river. Note makeshift bridges for pedestrians. USGS photo by T. J. Casadevall. August 12, 1991. #1:/Unzen Volcano, Japan, 1991/ctj00026 ID. Casadevall, T.J. 26 Unzen Volcano, Japan, 1991. View looking southsouthwest of north flank of Unzen volcano complex. Active dome growth forms highest point on skyline, slightly left of center of photograph, USGS photo by T. J. Casadevall. Japan, Nov 20, 1991. #1:/Unzen Volcano, Japan, 1991/ctj00027 ID. Casadevall, T.J. 27 Unzen Volcano, Japan, 1991. Aerial view of east face, Unzen volcano showing lava dome and paths of pyroclastic flows of June 3 & 8 (left side) and September 15 (right side). Mayoyama dome, site of 1792 collapse event, is located in lower right side of photograph. Photo by T. Kobayashi, Univ. Kagoshima. Japan, Nov 5, 1991. #1:/Unzen Volcano, Japan, 1991/ctj00028 ID. Casadevall, T.J. 28 Unzen Volcano, Japan, 1991. Aerial view of Mayuyama dome and Shimabara city. In foreground is path of pyroclastic flows and mudflow of June 30,1991 in Mizunashi drainage. Photo by: T. Kobayashi, Univ. Kagoshima. Japan, Nov. 5, 1991. #1:/Unzen Volcano, Japan, 1991/ctj00029 ID. Casadevall, T.J. 29 Unzen Volcano, Japan, 1991. Aerial view of first lava extrusion, summit of Unzen. Photo by Shimabara Earthquake and Volcano Observatory (SEVO). Japan, May 20, 1991. #1:/Unzen Volcano, Japan, 1991/ctj00030 ID. Casadevall, T.J. 30 Unzen Volcano, Japan, 1991. Aerial view of first lava extrusion, summit of Unzen. Photo by Shimabara Earthquake and Volcano Observatory (SEVO). Japan, May 20, 1991. #1:/Unzen Volcano, Japan, 1991/ctj00031 ID. Casadevall, T.J. 31 Unzen Volcano, Japan, 1991. Aerial view of northeast side of Unzen lava dome. Photo by T. Kobayashi, Univ. Kagoshima. Japan, November 2, 1991. #1:/Unzen Volcano, Japan, 1991/ctj00032 ID. Casadevall, T.J. 32 Unzen Volcano, Japan, 1991. Aerial view of northeast side of Unzen lava dome. USGS photo by T. J. Casadevall. Japan, November 20, 1991. #1:/Unzen Volcano, Japan, 1991/ctj00033 ID. Casadevall, T.J. 33 Unzen Volcano, Japan, 1991. Aerial view of Mizunashi river as it empties into Shimabara Bay. Houses are in Fukae district of Shimabara. USGS photo by T.J. Casadevall. Japan, November 19, 1991. #1:/Unzen Volcano, Japan, 1991/ctj00034 ID. Casadevall, T.J. 34 Unzen Volcano, Japan, 1991. N Aerial view to east of Oshiga gorge with deposits from Sept. 15,1991 pyroclastic flow. Photo by T. Kobayashi, Univ. Kagoshima. Japan, November 5, 1991. #1:/Unzen Volcano, Japan, 1991/ctj00035 ID. Casadevall, T.J. 35 Unzen Volcano, Japan, 1991. View of damaged houses, along Mizunashi river, Fukae district of Shimabara. USGS photo by T.J. Casadeval. Japan, November 19, 1991. #1:/Normark Collection--Pacific Ocean/nwr00001 ID. Normark, W.R. 1 East Pacific Rise, 21 degrees north. Base of "black smoker" chimney. Pacific Ocean. 1981. (Photo provided by W.R. Normak, USGS and taken on the East Pacific Rise expedition sponsored by the Scripps Institution of Oceanography). #1:/Gould Collect/gcn00001 ID. Gould, C.N. 1 High water Washita River at Anadarko, showing Choctaw bridge west of city. Caddo County, Oklahoma. ca 1900. #1:/Gould Collect/gcn00002 ID. Gould, C.N. 2 High water Washita River at Anadarko, showing embankment thrown across railroad track to keep the water out of the city. Caddo County, Oklahoma. ca 1900. #1:/Gould Collect/gcn00013 ID. Gould, C.N. 13 Bluff of Dakota sandstone slope of Black Mesa. Cimarron County, Oklahoma. ca 1900. #1:/Gould Collect/gcn00014 ID. Gould, C.N. 14 Sand cap and fragments on slop of Black Mesa 2 and 1/2 miles northwest of Kenton. Cimarron County, Oklahoma. ca 1900. #1:/Gould Collect/gcn00017 ID. Gould, C.N. 17 Dakota butte in valley of Cimarron, north of Kenton. Cimarron County, Oklahoma. ca 1900. #1:/Gould Collect/gcn00018 ID. Gould, C.N. 18 Southwest end of Black mesa, 2 1/2 miles northwest of Kenton. Cimarron County, Oklahoma. ca 1900. #1:/Gould Collect/gcn00025 ID. Gould, C.N. 25 Erosion forms a chimney in the Dakota sandstone, 5 miles east of Kenton. Cimarron County, Oklahoma. ca 1900. #1:/Gould Collect/gcn00026 ID. Gould, C.N. 26 Dakoa erosion forms, 6 miles east of Kenton. Cimarron County, Oklahoma. ca 1900. #1:/Gould Collect/gcn00033 ID. Gould, C.N. 33 Near view of Red beds, Dakota unconformity, 6 miles east of Exter. New Mexico. ca 1900. #1:/Gould Collect/gcn00034 ID. Gould, C.N. 34 Dakota hill with Red beds at base, 6 miles east of Exter. New Mexico. ca 1900. #1:/Gould Collect/gcn00045 ID. Gould, C.N. 45 Basalt dyke, Trinchera pass, view from east. 3 miles south of Trinchera. New Mexico. ca 1900. #1:/Gould Collect/gcn00046 ID. Gould, C.N. 46 East end of Raton Mesa, from slope of Johnson Mesaa, 15 miles east of Raton. Colfax County, New Mexico. ca 1900. #1:/Gould Collect/gcn00067 ID. Gould, C.N. 67 Granite cliffs, Cimarron Creek Canyon. Colfax County, New Mexico. ca 1900. #1:/Gould Collect/gcn00068 ID. Gould, C.N. 68 Granite cliffs, Cimarron Creek Canyon. Colfax County, New Mexico. ca 1900. #1:/Gould Collect/gcn00077 ID. Gould, C.N. 77 Sandstone bluff on Ute Creek, 3 miles north of Baca. Union County, New Mexico. ca 1900. #1:/Gould Collect/gcn00078 ID. Gould, C.N. 78 Red beds erosion, 2 miles above Albert. Union County, New Mexico. ca 1900. #1:/Gould Collect/gcn00085 ID. Gould, C.N. 85 Erosion formsin Red beds, 20 miles northwest of Tucumcari. San Miguel County, New Mexico. ca 1900. #1:/Gould Collect/gcn00086 ID. Gould, C.N. 86 Erosion forms in Red beds, 20 miles northwest of Tucumcari. San Miguel County, New Mexico. ca 1900. #1:/Gould Collect/gcn00089 ID. Gould, C.N. 89 Toad stool erosion in the Red beds, 2 miles west of Rivuelto. Quay County, New Mexico. ca 1900. #1:/Gould Collect/gcn00090 ID. Gould, C.N. 90 Erosion in the Red beds, 2 miles west of Rivuelto. Quay County, New Mexico. ca 1900. #1:/Gould Collect/gcn00101 ID. Gould, C.N. 101 Gysum boulder, 13 miles south of Texola. Beckham County, Oklahoma. ca 1900. #1:/Gould Collect/gcn00102 ID. Gould, C.N. 102 Gysum bluff and Red River, 18 miles southeast of Sayre. Beckham County, Oklahoma. ca 1900. #1:/Gould Collect/gcn00113 ID. Gould, C.N. 113 Ripple works formed by water in bed of river, near Noble. Cleveland County, Oklahoma. ca 1900. #1:/Gould Collect/gcn00114 ID. Gould, C.N. 114 Bed of South Canadian River showing bridge at 150 yards near Noble. Cleveland County, Oklahoma. ca 1900. #1:/Gould Collect/gcn00115 ID. Gould, C.N. 115 East pier of Noble Bridge across South Canadian River from down stream, Noble. Cleveland County, Oklahoma. ca 1900. #1:/Gould Collect/gcn00116 ID. Gould, C.N. 116 Noble Bridge from west end. Cleveland County, Oklahoma. ca 1900. #1:/Gould Collect/gcn00131 ID. Gould, C.N. 131 End of anticline. Arbuckle Mountains. Same of Photo #129. Murray County, Oklahoma. ca. 1900. #1:/Gould Collect/gcn00132 ID. Gould, C.N. 132 End of anticline. Arbuckle Mountains. Same of Photo #129. Murray County, Oklahoma. ca. 1900. #1:/Gould Collect/gcn00141 ID. Gould, C.N. 141 Washita Gourge. Fault in Arbuckle Limestone. Arbuckle Mountains. Murray C.county, Oklahoma. ca. 1900. #1:/Gould Collect/gcn00142 ID. Gould, C.N. 142 Washita Gourge. Titled Arbuckle Limestone. Arbuckle Mountains. Murray County, Oklahoma. ca. 1900. #1:/Gould Collect/gcn00169 ID. Gould, C.N. 169 Twin Mountains. Three parallel dikes, 6 inch, 2 inch, and ? inch wide and 3 and 4 feet apart. Kiowa County, Oklahoma. ca. 1900. #1:/Gould Collect/gcn00170 ID. Gould, C.N. 170 Twin Mountains. Near view of east peak from southeast. Kiowa County, Oklahoma. ca. 1900. #1:/Gould Collect/gcn00195 ID. Gould, C.N. 195 Julia Creek north of Silverton. Erosion forms among red beds. Briscoe County, Texas. ca. 1901. #1:/Gould Collect/gcn00196 ID. Gould, C.N. 196 Julia Creek north of Silverton. Erosion forms among red beds. Briscoe County, Texas. ca. 1901. #1:/Gould Collect/gcn00201 ID. Gould, C.N. 201 Tule Canyon. Hogback cap erosed on either side. This is a narrow ridge cut away by erosion. [Tule Canyon is the southern extension of the Great Planes of North America]. Swisher County, Texas. ca. 1901. #1:/Gould Collect/gcn00202 ID. Gould, C.N. 202 Tule Canyon. Columns of red beds supporting cap of sandstone. Swisher County, Texas. ca. 1901. #1:/Gould Collect/gcn00205 ID. Gould, C.N. 205 Tule Canyon. Erosion cap showing red bed columns. Swisher County, Texas. ca. 1901. #1:/Gould Collect/gcn00206 ID. Gould, C.N. 206 Tule Canyon. Erosion cap. Swisher County, Texas. ca. 1901. #1:/Gould Collect/gcn00207 ID. Gould, C.N. 207 Tule Canyon. Crossbedded sandstone. Swisher County, Texas. ca. 1901. #1:/Gould Collect/gcn00208 ID. Gould, C.N. 208 Tule Canyon. Erosion columns. Swisher County, Texas. ca. 1901. #1:/Gould Collect/gcn00247 ID. Gould, C.N. 247 Playa Lake, 5 miles south of Panhadle. Carson County, Texas. ca. 1901. #1:/Gould Collect/gcn00248 ID. Gould, C.N. 248 Cattle watering at the tank. 17 miles northeast of Panhadle. Carson County, Texas. ca. 1901. #1:/Gould Collect/gcn00375 ID. Gould, C.N. 375 Erosion forms and boulders. Quartz Mountain, east of Magnum. Greer County, Oklahoma. ca. 1901. #1:/Gould Collect/gcn00376 ID. Gould, C.N. 376 Erosion rills in granite, Quartz Mountain, east of Magnum. Greer County, Oklahoma. ca. 1901. #1:/Gould Collect/gcn00383 ID. Gould, C.N. 383 General view of Saddle Mountain. Comanche County, Oklahoma. 1901. #1:/Gould Collect/gcn00384 ID. Gould, C.N. 384 Concentric weathering, in granite, Saddle Mountain. Comanche County, Oklahoma. 1901. #1:/Gould Collect/gcn00387 ID. Gould, C.N. 387 Concentric weathering, in granite, Saddle Mountain. Comanche County, Oklahoma. 1901. #1:/Gould Collect/gcn00388 ID. Gould, C.N. 388 A balanced rock, Saddle Mountain, east of Luert. Comanche County, Oklahoma. 1901. #1:/Gould Collect/gcn00399 ID. Gould, C.N. 399 A US Geological Survey outfit west of Lawton. Comanche County, Oklahoma. 1901. #1:/Gould Collect/gcn00400 ID. Gould, C.N. 400 Part of a US Geological Survey outfit northwest of Lawton. [Man in photo is C.N. Gould]. Comanche County, Oklahoma. 1901. #1:/Gould Collect/gcn00401 ID. Gould, C.N. 401 Medicine bluff from east, northwest of Lawton. Comanche County, Oklahoma. 1901. #1:/Gould Collect/gcn00402 ID. Gould, C.N. 402 Gates of Ft. Sill, Lawton. Comanche County, Oklahoma. 1901. #1:/Utah-Canyonlands National Park/gdl01018 ID. Gaskill, D.L. 1018 Canyonlands National Park, Utah. Dark Canyon rapids, in Cataract Canyon of the Colorado River. 1960. #1:/Utah-Grand Staircase - Escalante National Monument/gdl01019 ID. Gaskill, D.L. 1019 Grand Staircase - Escalante National Monument, Utah. Jacob Hamblin Arch and Coyote Gulch. May 1978. #1:/Utah-Grand Staircase - Escalante National Monument/gdl01020 ID. Gaskill, D.L. 1020 Grand Staircase - Escalante National Monument, Utah. Coyote Wash from Jacob Hamblin Arch. 1978. #1:/Utah-Grand Staircase - Escalante National Monument/gdl01021 ID. Gaskill, D.L. 1021 Grand Staircase - Escalante National Monument, Utah. Escalante River, between Stevens Gulch and Coyote Gulch. June 1978. #1:/Utah-Grand Staircase - Escalante National Monument/gdl01022 ID. Gaskill, D.L. 1022 Grand Staircase - Escalante National Monument, Utah. Escalante River, between Stevens Gulch and Coyote Gulch. June 1978. #1:/Utah-Grand Staircase - Escalante National Monument/gdl01023 ID. Gaskill, D.L. 1023 Grand Staircase - Escalante National Monument, Utah. Escalante River, below Fools Canyon(?). May 1979. #1:/Utah-Grand Staircase - Escalante National Monument/gdl01024 ID. Gaskill, D.L. 1024 Grand Staircase - Escalante National Monument, Utah. Escalante River, between Fools and Stevens Gulch. May 1979. #1:/Utah-Grand Staircase - Escalante National Monument/gdl01025 ID. Gaskill, D.L. 1025 Grand Staircase - Escalante National Monument, Utah. Escalante River, between Scorpion and Fools Canyon. May 1979. #1:/Utah-Grand Staircase - Escalante National Monument/gdl01026 ID. Gaskill, D.L. 1026 Grand Staircase - Escalante National Monument, Utah. Escalante River, several miles downstream from Scorpion Canyon. May 1979. #1:/Utah-Grand Staircase - Escalante National Monument/gdl01027 ID. Gaskill, D.L. 1027 Grand Staircase - Escalante National Monument, Utah. About 5 miles below Scorpion Canyon. May 1979. #1:/Utah-Grand Staircase - Escalante National Monument/gdl01028 ID. Gaskill, D.L. 1028 Grand Staircase - Escalante National Monument, Utah. A occupied cul de sac vale, swimming hole in Coyote Wash. May 1978. #1:/Utah-Grand Staircase - Escalante National Monument/gdl01029 ID. Gaskill, D.L. 1029 Grand Staircase - Escalante National Monument, Utah. Swimming hole and amphitheater tributary to Coyote Creek. May 1978. #1:/Arkansas-Bulletin 735/mhd00131 ID. Miser, H.D. 131 Exposures of the hypabyssal, intrusive peridotite ("Hardebank") in the northern part of Mauney mine, near Murfreesboro, Pike County, Arkansas. 1912. Plate 10-A in U.S. Geological Survey. Bulletin 735. 1923. #1:/Arkansas-Bulletin 735/mhd00135 ID. Miser, H.D. 135 Looking north across the large open cut of Mauney mine, near Murfreesboro, the large cut is in "yellow ground" and "green ground" derived from volcanic breccia. There are outcrops of hypabyssal intrusive peridotite ("Hardebank") near the building in the distance. Pike County, Arkansas. 1912. Plate 10-B in U.S. Geological Survey. Bulletin 735. 1923. #1:/Arkansas-Bulletin 735/mhd00136 ID. Miser, H.D. 136 Ozark mine and washing plant, looking northeast, the Cut is largely in "blue ground" and "yellow ground" that have derived from volcanic breccia; taken in 1916, since destroyed by fire. Near Murfreesboro, Pike County, Arkansas. 1912. Plate 11-B in U.S. Geological Survey. Bulletin 735. 1923. #1:/Arkansas-Bulletin 735/mhd00137 ID. Miser, H.D. 137 Altered volcanic breccia ("blue ground") in cut of Ozark mine, near Murfreesboro, Pike County, Arkansas. 1912. Plate 11-A in U.S. Geological Survey. Bulletin 735. 1923. #1:/Arkansas-Bulletin 735/mhd0649a ID. Miser, H.D. 649a Diamonds from the Arkansas mine; diamonds shown are owned by Col. W.A. Roebling, they are crystals with the following weights: No. 1, 11.21 carats; No. 2, 6. 83 carats; No. 3, 3.30 carats; No. 4, 2.77 carats; No. 5, 17.86 carats; No. 6, 4.40 carats; No. 7, 1.19 carats; No. 8, 0.91 carats; No. 9, 2.50 carats, and No. 10, 1.40 carats. Natural size. Pike County, Arkansas. 1916. Plate 15-A in U.S. Geological Survey. Bulletin 735. 1923. #1:/Nevada-Bulletin 735/nlf00117 ID. Noble, L.F. 117 Typical exposures of limestone member of Horse Spring formation, near Horse Spring, limestone member of Horse Springs formation on the left ridge; Overton conglomerate (center); Paleozoic limestone (right) and La Plata sandstone (right center). Clark County, Nevada. 1915. Plate 1-A in U.S. Geological Survey. Bulletin 735. 1923. #1:/Nevada-Bulletin 735/nlf00118 ID. Noble, L.F. 118 Typical exposures of limestone member of Horse Spring formation, near Bitter Spring, limestone member of Horse Springs formation center ridge. Clark County, Nevada. 1915. Plate 1-B in U.S. Geological Survey. Bulletin 735. 1923. #1:/Nevada-Bulletin 735/nlf00119 ID. Noble, L.F. 119 Colemanite deposit near Callville Wash, looking east along outcrop of colemanite bed; extends from near center to right side of view. Clark County, Nevada. 1915. Plate 2-B in U.S. Geological Survey. Bulletin 735. 1923. #1:/Nevada-Bulletin 735/nlf00120 ID. Noble, L.F. 120 Colemanite deposit near Callville Wash, looking west along outcrop colemanite bed; extends from center left to ridge near center. Clark County, Nevada. 1915. Plate 2-B in U.S. Geological Survey. Bulletin 735. 1923. #1:/Nevada-Bulletin 735/nlf00121 ID. Noble, L.F. 121 "Goose egg" structure in limestone beds associated with colemanite deposit. Near Callville Wash, Clark County, Nevada. 1915. Plate 3-A in U.S. Geological Survey. Bulletin 735. 1923. #1:/Nevada-Bulletin 735/nlf00122 ID. Noble, L.F. 122 "Goose egg" structure in limestone beds associated with colemanite deposit. Near Callville Wash, Clark County, Nevada. 1915. Plate 3-B in U.S. Geological Survey. Bulletin 735. 1923. #1:/Maine-Bulletin 738/dtn00202 ID. Dale, T.N. 202 Monument of quartz diorite from Round Pond quarry, ready to be shipped, showing contrast between cut and polished surfaces. Lincoln County, Maine. Plate 22-A in U.S. Geological Survey. Bulletin 738. 1923. #1:/Massachusett-Bulletin 738/dtn00215 ID. Dale, T.N. 215 Deep pit granite quarry, near Bay View, Rock Port, looking north, showing in upper part thick faulted dike of hornblende diabase, cut along fault plane by a thin dike of lampropyre without biotite, reaching to bottom at left; also, in center below an irregular injection of hornblende diabase. Some of the joints are parallel to the thick dike. Essex County, Massachusetts. Plate 27- B in U.S. Geological Survey. Bulletin 738. 1923. #1:/Massachusett-Bulletin 738/dtn00222 ID. Dale, T.N. 222 Monument of polished diabase porphyry from Pigeon Cove, Rockport; diameter of ball 2 feet 7 inches. Essex County, Massachusetts. Plate 25-B in U.S. Geological Survey. Bulletin 738. 1923. #1:/Rhode Island- Bulletin 738/dtn0325a ID. Dale, T.N. 325a Carving in fine quartz monzonite, "blue westerly" granite from the New England Granite Works quarry, Westerly, Washington County, Rhode Island. Plate 34-B in U.S. Geological Survey. Bulletin 738. 1923 #1:/New Mexico-Bulletin 726/dnh01366 ID. Darton, N.H. 1366 Sandstone of Glorieta mesa near La Cuesta, San Miguel County, New Mexico. Circa 1915. Plate 33-B in U.S. Geological Survey. Bulletin 726. 1922. #1:/New Mexico-Bulletin 726/dnh01436 ID. Darton, N.H. 1436 West front of Sacramento Mountains from a point near Alamogordo, Otero County, New Mexico. Circa 1915. Plate 34-B in U.S. Geological Survey. Bulletin 726. 1922. #1:/New Mexico-Bulletin 726/dnh01437 ID. Darton, N.H. 1437 West front of Sacramento Mountains from a point near Alamogordo, Otero County, New Mexico. Circa 1915. Plate 34-B in U.S. Geological Survey. Bulletin 726. 1922. #1:/New Mexico-Bulletin 726/dnh1579a ID. Darton, N.H. 1579a Dakota sandstone at Bluewater Falls, Otero County, New Mexico. Circa 1915. Plate 35-A in U.S. Geological Survey. Bulletin 726. 1922. #1:/New Mexico-Bulletin 726/dnh01630 ID. Darton, N.H. 1630 Bluewater Canyon, limestone and sandstone of Chupadera formation. Otero County, New Mexico. Circa 1915. Plate 32-A in U.S. Geological Survey. Bulletin 726. 1922. #1:/New Mexico-Bulletin 726/dnh01638 ID. Darton, N.H. 1638 El Morro National Monument, New Mexico. Inscription Rock, Navajo sandstone on southwest slope of Zuni Mountains. Circa 1915. Plate 32-B in U.S. Geological Survey. Bulletin 726. 1922. #1:/New Mexico-Bulletin 726/dnh01641 ID. Darton, N.H. 1641 Pyramid Rock, 10 miles east of Gallup, red cliffs of Wingate sandstone in foreground; Navajo sandstone and higher beds on ridge and pyramid. McKinley County, New Mexico. Circa 1915. Plate 32-B in U.S. Geological Survey. Bulletin 726. 1922. #1:/New Mexico-Bulletin 726/dnh01654 ID. Darton, N.H. 1654 Dome near San Ignacio, San Miguel County, New Mexico. Circa 1915. Plate 36-A in U.S. Geological Survey. Bulletin 726. 1922. #1:/North Dakota-Bulletin 726/het00137 ID. Hancock, E.T. 137 Large glacial boulders on upland in Sec. 17, T. 138 N., R. 84 W. Morton County, North Dakota. 1914. Plate 2-A in U.S. Geological Survey. Bulletin 726. 1922. #1:/North Dakota-Bulletin 726/het00141 ID. Hancock, E.T. 141 Cannonball marine member of the Lance formation in bluff of Heart River. Sec. 10, T. 138 N., R. 83 W. Morton County, North Dakota. 1914. Plate 2-B in U.S. Geological Survey. Bulletin 726. 1922. #1:/North Dakota-Bulletin 726/het00142 ID. Hancock, E.T. 142 Valley of Heart River in T. 138 N., R. 83 W., level upland in the distance. Morton County, North Dakota. 1914. Plate 1-B in U.S. Geological Survey. Bulletin 726. 1922. #1:/North Dakota-Bulletin 726/het00184 ID. Hancock, E.T. 184 Crown Butte on upland in Sec. 31, T. 140 N., R. 82 W., looking northeast. Morton County, North Dakota. 1914. Plate 4-B in U.S. Geological Survey. Bulletin 726. 1922. #1:/North Dakota-Bulletin 726/het00186 ID. Hancock, E.T. 186 Dakota Products Company's mine near New Salem, this mine has been abandoned. Morton County, North Dakota. 1914. Plate 4-A in U.S. Geological Survey. Bulletin 726. 1922. #1:/Arizona-Bulletin 743/rfl01166 ID. Ransome, F.L. 1166 Topography of the Oatman district: General view to the northwest over the central and northwestern part of the district, from the Ute Mountains. The town of Oatman is mostly to the right of the view. The rough peaks in the foreground are Esperanza trachyte. The distant mountains are in Colorado. Mohave County, Arizona. 1921. Plate 3-A in U.S. Geological Survey. Bulletin 743. 1923. #1:/Arizona-Bulletin 743/rfl01168 ID. Ransome, F.L. 1168 Topography of the Black Mountains: Northeast over the broad top of the mountain southeast of Oatman, part of the western slope of the range appears on the left. The light colored crag on the extreme left is the rhyolite plug known at The Elephant's Tooth. Mohave County, Arizona. 1921. Plate 2-B in U.S. Geological Survey. Bulletin 743. 1923. #1:/Arizona-Bulletin 743/rfl01171 ID. Ransome, F.L. 1171 Topography of the Oatman district: The Ruth and Moss mines from the south. The prevailing rock is the Moss porphyry. In the left center are the shaft and mill of the Ruth mine. Above and a little to the left is the shaft of the Moss mine, with the prominent outcrops of the Moss vein stretching away to the right. Mohave County, Arizona. 1921. Plate 4-B in U.S. Geological Survey. Bulletin 743. 1923. #1:/Arizona-Bulletin 743/rfl01174 ID. Ransome, F.L. 1174 The Moss vein at the Moss mine, one of the most massive outcrops in the district, fluorite appears to be generally more abundant than calcite in this vein. Mohave County, Arizona. 1921. Plate 9-B in U.S. Geological Survey. Bulletin 743. 1923. #1:/Arizona-Bulletin 743/rfl01247 ID. Ransome, F.L. 1247 Mines of the Oatman district; southeast along the Tom Reed vein; the following mines are identified left to right up the valley at right; Grey Eagle shaft, Hooper shaft, on outcrop of the upper segment of the Tom Reed vein, Bald Eagle shaft, on same outcrop, Aztec shaft, Black Eagle dump, and American mine. Mohave County, Arizona. 1921. Plate 11-B in U.S. Geological Survey. Bulletin 743. 1923. #1:/Arizona-Bulletin 743/rfl01251 ID. Ransome, F.L. 1251 Mines of the Oatman district; northwest, toward Oatman, along the Tom Reed vein from the vicinity of the Aztec shaft, the following mines are identified going diagonally left to right, from the foreground to notch on the right skyline; Aztec shaft, Bald Eagle shaft, Grey Eagle shaft, Red Lion shaft, Big Jim shaft, Benjamin Harrison shaft, Olla Oatman shaft, United Eastern No. 1 shaft, and United Eastern No. 2 shaft (just below the notch). Mohave County, Arizona. 1921. Plate 11-A in U.S. Geological Survey. Bulletin 743. 1923. #1:/Arizona-Bulletin 743/rfl01253 ID. Ransome, F.L. 1253 Topography of the Oatman district: Hills capped by Esperanza trachyte 1.5 miles south of Oatman looking southwest, shows characteristic topography of the Esperanza trachyte with talus slopes of hard, clinking rock flakes. The White Cloud shaft, in the left center, is the Alcyone trachyte. Directly behind it is an exposure of the sedimentary beds that separate the trachyte. Mohave County, Arizona. 1921. Plate 5-A in U.S. Geological Survey. Bulletin 743. 1923. #1:/Arizona-Bulletin 743/rfl01255 ID. Ransome, F.L. 1255 Laminated structure of the Alcyone Trachyte: Two miles south-southwest of Oatman, looking northwest. Mohave County, Arizona. 1921. Plate 6-B in U. S. Geological Survey. Bulletin 743. 1923. #1:/Arizona-Bulletin 743/rfl01257 ID. Ransome, F.L. 1257 Vein structure: near view of the Gold Dust vein in a surface cut just north of the No. 2 shaft of the Gold Dust mine. The principal mass of quartz and calcite is here about 5 feet wide, with many stringers on both sides. Mohave County, Arizona. 1921. Plate 7-A in U.S. Geological Survey. Bulletin 743. 1923. #1:/Arizona-Bulletin 743/rfl01258 ID. Ransome, F.L. 1258 Vein structure: More general view of the Gold Dust vein at the same locality, looking northwest. The extraordinary complex of quartz-calcite stringers here displayed is on the hanging-wall side of the vein shown in Ransome 1257 and forms a zone at least 100 feet wide. Calcite is more abundant than quartz. Mohave County, Arizona. 1921. Plate 7-B in U.S. Geological Survey. Bulletin 743. 1923. #1:/Arizona-Bulletin 743/rfl01259 ID. Ransome, F.L. 1259 Topography of the Oatman district: Boundary cone from the northeast, a plug of nearly white rhyolite that has been thrust up through Alcyone trachyte. Mohave County, Arizona. 1921. Plate 5-B in U.S. Geological Survey. Bulletin 743. 1923. #1:/Arizona-Bulletin 743/rfl01262 ID. Ransome, F.L. 1262 Topography of the Black Mountains: Western front, looking northeast from a point near Oatman. The original or No. 1 shaft of the United Eastern mine appears in the right foreground, at the north end of town. The present main or No. 2 shaft, in the left center, is in the hanging wall of the vein. The dump in the left foreground is that of the Olla Oatman shaft, on the southwest branch of the Tom Reed vein. The flows whose edges appear along the mountain side are part of the Gold Road latite. The lighter colored irregular areas are intrusive rhyolite. Mohave County, Arizona. 1921. Plate 2-A in U.S. Geological Survey. Bulletin 743. 1923. #1:/Arizona-Bulletin 743/rfl01264 ID. Ransome, F.L. 1264 Mines of the Oatman district; Up Gold Road Gulch, showing the surface relations of the Gold Road mine, right to left the following are identified; Gold Road Mill, No. 1 shaft, and No. 3 shaft. All the rock included in the view is the Gold Road latite. The generally easterly dip of the flows is distinctly shown. Mohave County, Arizona. 1921. Plate 12-A in U.S. Geological Survey. Bulletin 743. 1923. #1:/Arizona-Bulletin 743/rfl01265 ID. Ransome, F.L. 1265 The Gold Road vein as exposed on the Oatman-Kingman road, looking southeast, shows the relatively regular zone of sheeting followed by this vein. Mohave County, Arizona. 1921. Plate 9-A in U.S. Geological Survey. Bulletin 743. 1923. #1:/Arizona-Bulletin 743/rfl01271 ID. Ransome, F.L. 1271 Topography of the Oatman district: Mountains on the northwest side of Times Gulch, the prevailing rock is Times porphyry. Mohave County, Arizona. 1921. Plate 4-A in U.S. Geological Survey. Bulletin 743. 1923. #1:/Arizona-Bulletin 743/rfl01274 ID. Ransome, F.L. 1274 Mines of the Oatman district; Leland Hill from the southeast, looking along the vein; the following are identified in lazy clockwise circle starting about at the prominent outcrop in the center of the hill; No. 1 tunnel, No. 2 tunnel, No. 3 tunnel and on the ridge at left, Mitchell shaft. Mohave County, Arizona. 1921. Plate 12-B in U.S. Geological Survey. Bulletin 743. 1923. #1:/Arizona-Bulletin 743/rfl01275 ID. Ransome, F.L. 1275 Laminated structure of the Alcyone trachyte, near Treadwell shaft of the Pioneer mine. Mohave County, Arizona. 1921. Plate 6-B in U.S. Geological Survey. Bulletin 743. 1923. #1:/Arizona-Bulletin 743/rfl01277 ID. Ransome, F.L. 1277 Vein structure; part of the Pioneer vein at the Treadwell shaft, looking north, shows a complex of banded quartz-calcite stringers. Mohave County, Arizona. 1921. Plate 8-A in U.S. Geological Survey. Bulletin 743. 1923. #1:/Arizona-Bulletin 743/rfl01278 ID. Ransome, F.L. 1278 Vein structure; Pioneer vein, looking south along the vein and over the top of an old stope near the Thirty-fifth Parallel shaft, this vein show the smooth, regular hanging wall of a strike fault that is younger than the vein and supposedly cuts off the ore bodies above the 400 (foot) level. Mohave County, Arizona. 1921. Plate 8-B in U.S. Geological Survey. Bulletin 743. 1923. #1:/Arizona-Bulletin 743/rfl01285 ID. Ransome, F.L. 1285 Topography of the Oatman district: Leland Hill from the southeast, the shaft and mill low down in front of the hill are those of the Vivian mine. Higher and a little to the left is the Mitchell shaft of the Leland vein is marked by a line of tunnels and dumps to the right or east slope of the hill. The prevailing rock in the view is the Alcyone trachyte. Mohave County, Arizona. 1921. Plate 3-B in U. S. Geological Survey. Bulletin 743. 1923. #1:/Montana-Bulletin 751/bcm00083 ID. Bauer, C.M. 83 Characteristic topographic features of the northern part of the Ekalaka lignite field, clinker capped hills of the Tongue River member of the Fort Union formation and lowlands of the Ludlow lignite member of the Lance formation, in T. 4 N., R. 59 E. Carter County, Montana. 1914. Plate 31-A in U.S. Geological Survey. Bulletin 751. 1925. #1:/Montana-Bulletin 751/bcm00088 ID. Bauer, C.M. 88 Lignite outcrop at McKenzie prospect, on Spring Creek at location 2, Sec. 4, T. 4 N., R. 57 E. Carter County, Montana. 1914. Plate 32-A in U.S. Geological Survey. Bulletin 751. 1925. #1:/Montana-Bulletin 751/bcm00119 ID. Bauer, C.M. 119 Lignite outcrop in bluffs on Boxelder Creek in Sec. 9, T. 1 N., R. 61 E., in the upper part of the Hell Creek member of the Lance formation, at location 210. Carter County, Montana. 1914. Plate 32-B in U.S. Geological Survey. Bulletin 751. 1925. #1:/Montana-Bulletin 751/caj00557 ID. Collier, A.J. 557 Strip pit at Coal Creek mind, Sec. 16, T. 37 N., R. 45 E. Scobey lignite field. Daniels County, Montana. 1916. Plate 23-B in U.S. Geological Survey. Bulletin 751. 1925. #1:/Montana-Bulletin 751/caj00560 ID. Collier, A.J. 560 Escarpment of Hell Creek member of Lance formation, Sec. 23, T. 36 N, R. 48 E. Scobey lignite field. Daniels County, Montana. 1916. Plate 22-A in U.S. Geological Survey. Bulletin 751. 1925. #1:/Montana-Bulletin 751/caj00561 ID. Collier, A.J. 561 Mead strip mine, Sec. 3, T. 35 N., R. 44 E. Daniels County, Montana. 1916. Plate 23-A in U.S. Geological Survey. Bulletin 751. 1925. #1:/Montana-Bulletin 751/caj00563 ID. Collier, A.J. 563 Strip mine at locality 201, Sec. 33, T. 37 N., R. 47 E. Scobey lignite field. Daniels County, Montana. 1916. Plate 24-A in U.S. Geological Survey. Bulletin 751. 1925. #1:/Canada-Bulletin 751/caj00564 ID. Collier, A.J. 564 Burton mine on Coal Creek bed in Saskatchewan, Canada. 1916. Plate 24-B in U.S. Geological Survey. Bulletin 751. 1925. #1:/Montana-Bulletin 751/caj00569 ID. Collier, A.J. 569 East side of Whiskey Buttes, Sec. 36, T. 36 N., R. 46 E. Scobey lignite field. Daniels County, Montana. 1916. Plate 21-A in U.S. Geological Survey. Bulletin 751. 1925. #1:/Montana-Bulletin 751/caj00578 ID. Collier, A.J. 578 Clinker mass surmounted by an eagles nest, Sec. 20, T. 37 N., R. 46 E. Scobey lignite field. Daniels County, Montana. 1916. Plate 25-A in U.S. Geological Survey. Bulletin 751. 1925. #1:/Montana-Bulletin 751/caj00600 ID. Collier, A.J. 600 Fisher mine, locality 63, Sec. 36, T. 37 N., R. 42 E. Scobey lignite field. Daniels County, Montana. 1916. Plate 22-A in U.S. Geological Survey. Bulletin 751. 1925. #1:/Colorado-Bulletin 751/lwt01807 ID. Lee, W.T. 1807 North wall of gap at Morrison, showing the upper sandstone separated into two members, by thin dark shale. The base of this sandstone is marked by a porous layer of sandstone that contains fragments of carbonized wood. Soft shaly sandstone contains fossil plants of the Dakota flora. Jefferson County, Colorado. 1921. Plate 5-B in U.S. Geological Survey. Bulletin 751. 1925. #1:/Colorado/lwt01809 ID. Lee, W.T. 1809 Roxborough Park, Douglas County, Colorado. 1921. #1:/Colorado/lwt01811 ID. Lee, W.T. 1811 Notice the livestock grazing Roxborough Park. Douglas County, Colorado. 1921. #1:/Colorado/lwt01812 ID. Lee, W.T. 1812 A rock formation in Roxborough, Douglas County, Colorado. 1921. #1:/Colorado-Bulletin 751/lwt01824 ID. Lee, W.T. 1824 Lower shale of the Dakota group 2 miles north of Bellvue, the massive rocks are the lower sandstone of the Dakota group, and the shale and thin sandstones above are the variegated lower shale, here capped inconspicuously by the middle sandstone. Larimer County, Colorado 1921. Plate 2-B in U.S. Geological Survey. Bulletin 751. 1925. #1:/Wyoming-Bulletin 751/lwt01877 ID. Lee, W.T. 1877 Ridge near Iron Mountain, where Chugwater Creek cuts the Dakota hogback: Showing the upper sandstone; the middle shale, which is fossiliferous near the top; and the middle sandstone. Sweetwater County, Wyoming. 1921. Plate 1-B in U.S. Geological Survey. Bulletin 751. 1925. #1:/Utah-Bulletin 751/mhd00507 ID. Miser, H.D. 507 Looking north up and across San Juan River, from the mouth of Nokai Creek, shows the flexed rocks on the crest and east slope of the Balance Rock anticline. Wingate sandstone and Todilto formation; Chinle formation; Shinarump conglomerate; Moenkopi formation; De Chelly(?) sandstone lentil of Moenkopi. San Juan County, Utah. 1921. Plate 19-A in U.S. Geological Survey. Bulletin 751. 1925. Plate 9-C in U.S. Geological Survey. Water-supply paper 538. 1924. #1:/Utah-Bulletin 751/mhd00602 ID. Miser, H.D. 602 Looking west down San Juan River, from a point three-fourths mile below mouth of Nokai Creek; note the low westward slope of the beds, which lie on the west slope of the Balance Rock anticline. Navajo sandstone; Todilto (?) formation; Wingate sandstone; Chinle formation; Shinarump conglomerate; Moenkopi formation; De Chelly sandstone lentil of Moenkopi: Coconino sandstone. Photo by Robert N. Allen. San Juan County, Utah. 1921. Plate 19-B in U.S. Geological Survey. Bulletin 751. 1925. #1:/Utah-Bulletin 751/mhd00609 ID. Miser, H.D. 609 Looking south from the lower end of the Great Bend, San Juan River. The rocks here lie on the west slope of the Balance Rock anticline. Wingate, Todilto (?) and Navajo sandstones form cliffs. Badland slopes extending from the cliffs to the river are underlain by Chinle formation, landslides, terrace deposits, and sandstone debris. Photo by Robert N. Allen. San Juan County, Utah. 1921. Plate 20-A in U.S. Geological Survey. Bulletin 751. 1925. #1:/Alaska-Bulletin 745/mjb00220 ID. Mertie, J.B. 220 Characteristic exposure of Chitistone limestone on Strelna Creek, below the limestone is greenstone. Chintina district, Alaska Gulf region, Alaska. 1914. Plate 13-B in U.S. Geological Survey. Bulletin 745. 1923. #1:/Alaska-Bulletin 745/mjb00244 ID. Mertie, J.B. 244 Folded and sheared carboniferous limestone on Iron Creek. Valdez district, Alaska Gulf region, Alaska. 1914. Plate 8-B in U.S. Geological Survey. Bulletin 745. 1923. #1:/Alaska-Bulletin 745/mjb00245 ID. Mertie, J.B. 245 Head of Elliott Creek, shows the Chitistone limestone scarp encircling the valley. Mount Blackburn in the background. Valdez district, Alaska Gulf region, Alaska. 1914. Plate 10 in U.S. Geological Survey. Bulletin 745. 1923. #1:/Alaska-Bulletin 745/mjb00247 ID. Mertie, J.B. 247 North side of Elliott Creek valley, shows the scarp of the Chitistone limestone, beneath which is the Nikolai greenstone. The rugged ridge above the limestone is conglomerate. Valdez district, Alaska Gulf region, Alaska. 1914. Plate 5-B in U.S. Geological Survey. Bulletin 745. 1923. #1:/Alaska-Bulletin 745/mjb00248 ID. Mertie, J.B. 248 North side of Elliott Creek valley, shows the scarp of the Chitistone limestone, beneath which is the Nikolai greenstone. The rugged ridge above the limestone is conglomerate. Valdez district, Alaska Gulf region, Alaska. 1914. Plate 5-B in U.S. Geological Survey. Bulletin 745. 1923. #1:/Alaska-Bulletin 745/mjb00249 ID. Mertie, J.B. 249 North side of Elliott Creek valley, shows the scarp of the Chitistone limestone, beneath which is the Nikolai greenstone. The rugged ridge above the limestone is conglomerate. Valdez district, Alaska Gulf region, Alaska. 1914. Plate 5-B in U.S. Geological Survey. Bulletin 745. 1923. #1:/Alaska-Bulletin 745/mjb00250 ID. Mertie, J.B. 250 North side of Elliott Creek valley, shows the scarp of the Chitistone limestone, beneath which is the Nikolai greenstone. The rugged ridge above the limestone is conglomerate. Valdez district, Alaska Gulf region, Alaska. 1914. Plate 5-B in U.S. Geological Survey. Bulletin 745. 1923. #1:/Alaska-Bulletin 745/mjb00252 ID. Mertie, J.B. 252 Kotsina River a few miles below the mouth of Elliott Creek, looking southwest. Valdez district, Alaska Gulf region, Alaska. 1914. Plate 4 in U.S. Geological Survey. Bulletin 745. 1923. #1:/Alaska-Bulletin 745/mjb00253 ID. Mertie, J.B. 253 Kotsina River a few miles below the mouth of Elliott Creek, looking southwest. Valdez district, Alaska Gulf region, Alaska. 1914. Plate 4 in U.S. Geological Survey. Bulletin 745. 1923. #1:/Alaska-Bulletin 745/mjb00259 ID. Mertie, J.B. 259 Thin limestone beds in black Triassic shale on Strelna Creek near Dixie Pass. Chintina district, Alaska Gulf region, Alaska. 1914. Plate 11-B in U.S. Geological Survey. Bulletin 745. 1923. #1:/Alaska-Bulletin 745/mjb00260 ID. Mertie, J.B. 260 Folded and faulted Triassic limestones on the west branch of Rock Creek. Talus at the left almost conceals the Nikolai greenstone. Valdez district, Alaska Gulf region, Alaska. 1914. Plate 9-B in U.S. Geological Survey. Bulletin 745. 1923. #1:/Alaska-Bulletin 745/mjb00265 ID. Mertie, J.B. 265 Mouth of Peacock Creek, shows a canyon cut through the lip of a hanging valley. Valdez district, Alaska Gulf region, Alaska. 1914. Plate 9-A in U.S. Geological Survey. Bulletin 745. 1923. #1:/Alaska-Bulletin 745/mjb00268 ID. Mertie, J.B. 268 Thin beds in Chitistone limestone west of Kluvesna River. Valdez district, Alaska Gulf region, Alaska. 1914. Plate 8-A in U.S. Geological Survey. Bulletin 745. 1923. #1:/Alaska-Bulletin 745/mjb00282 ID. Mertie, J.B. 282 Thin-bedded Triassic calcareous argillite and shale near forks of Rock Creek, the exposure is near a fault, and the beds are intensely folded. Valdez district, Alaska Gulf region, Alaska. 1914. Plate 18-A in U.S. Geological Survey. Bulletin 745. 1923. #1:/Alaska-Bulletin 745/mjb00283 ID. Mertie, J.B. 283 Triassic argillite and shale on the east branch of Rock Creek. Valdez district, Alaska Gulf region, Alaska. 1914. Plate 18-A in U.S. Geological Survey. Bulletin 745. 1923. #1:/Alaska-Bulletin 745/mjb00286 ID. Mertie, J.B. 286 Copper ore on the Big Horn group, the large disk like mass over the tunnel is a mixture of bornite and chalcocite. Valdez district, Alaska Gulf region, Alaska. 1914. Plate 19-A in U.S. Geological Survey. Bulletin 745. 1923. #1:/Alaska-Bulletin 745/mjb00294 ID. Mertie, J.B. 294 Panorama of Mount Blackburn and adjacent mountains, from a high point north of Slatka Creek. Valdez district, Alaska Gulf region, Alaska. 1914. Plate 5-A in U.S. Geological Survey. Bulletin 745. 1923. #1:/Alaska-Bulletin 745/mjb00295 ID. Mertie, J.B. 295 Panorama of Mount Blackburn and adjacent mountains, from a high point north of Slatka Creek. Valdez district, Alaska Gulf region, Alaska. 1914. Plate 5-A in U.S. Geological Survey. Bulletin 745. 1923. #1:/Alaska-Bulletin 745/mjb00296 ID. Mertie, J.B. 296 Panorama of Mount Blackburn and adjacent mountains, from a high point north of Slatka Creek. Valdez district, Alaska Gulf region, Alaska. 1914. Plate 5-A in U.S. Geological Survey. Bulletin 745. 1923. #1:/Alaska-Bulletin 745/mjb00297 ID. Mertie, J.B. 297 Panorama of Mount Blackburn and adjacent mountains, from a high point north of Slatka Creek. Valdez district, Alaska Gulf region, Alaska. 1914. Plate 5-A in U.S. Geological Survey. Bulletin 745. 1923. #1:/Alaska-Bulletin 745/mjb00298 ID. Mertie, J.B. 298 Panorama of Mount Blackburn and adjacent mountains, from a high point north of Slatka Creek. Valdez district, Alaska Gulf region, Alaska. 1914. Plate 5-A in U.S. Geological Survey. Bulletin 745. 1923. #1:/Alaska-Bulletin 745/mjb00299 ID. Mertie, J.B. 299 Panorama of Mount Blackburn and adjacent mountains, from a high point north of Slatka Creek. Valdez district, Alaska Gulf region, Alaska. 1914. Plate 5-A in U.S. Geological Survey. Bulletin 745. 1923. #1:/Alaska-Bulletin 745/mjb00305 ID. Mertie, J.B. 305 The copper "nugget" from which Nugget Creek takes it name. Chitina district, Alaska Gulf region, Alaska. 1914. Plate 19-A in U.S. Geological Survey. Bulletin 745. 1923. #1:/Alaska/mjb00449 ID. Mertie, J.B. 449 Panorama of valley of Livengood Creek, town of Livengood in foreground; Livengood dome in right background. Fairbanks district, Yukon region, Alaska. July 15, 1916. #1:/Alaska/mjb00450 ID. Mertie, J.B. 450 Panorama of valley of Livengood Creek, town of Livengood in foreground; Livengood dome in right background. Fairbanks district, Yukon region, Alaska. July 15, 1916. #1:/Alaska/mjb00451 ID. Mertie, J.B. 451 Panorama of valley of Livengood Creek, town of Livengood in foreground; Livengood dome in right background. Fairbanks district, Yukon region, Alaska. July 15, 1916. #1:/Alaska/mjb00452 ID. Mertie, J.B. 452 Panorama of valley of Livengood Creek, town of Livengood in foreground; Livengood dome in right background. Fairbanks district, Yukon region, Alaska. July 15, 1916. #1:/Alaska/mjb00453 ID. Mertie, J.B. 453 Panorama of valley of Livengood Creek, town of Livengood in foreground; Livengood dome in right background. Fairbanks district, Yukon region, Alaska. July 15, 1916. #1:/Colorado-Bulletin 751/sjd00053 ID. Sears, J.D. 53 Sandstone near base of Mancos shale, east of Juniper Mountain: Horizontal Browns Park formation in background. Moffat County, Colorado. 1922. Plate 37-A in U.S. Geological Survey. Bulletin 751. 1925. #1:/Colorado-Bulletin 751/sjd00078 ID. Sears, J.D. 78 Oil saturated conglomerate at base of Dakota sandstone, Sec. 23, T. 9 N., R. 100 W. Moffat County, Colorado. 1922. Plate 36 in U.S. Geological Survey. Bulletin 751. 1925. #1:/Colorado-Bulletin 751/sjd00082 ID. Sears, J.D. 82 Basal conglomerate of Browns Park formation, Sec 6, T. 9 N., R. 100 W., sandy matrix is heavily saturated with oil. Apparent major set of ripples to the right and above the man were probably caused during the mounting in the photo album. Moffat County, Colorado. 1922. Plate 37-B in U.S. Geological Survey. Bulletin 751. 1925. #1:/Portraits Collection/djs0358g ID. Diller, J.S. 358g 1. Cleophas C. O'Hara, 2. Sir Archibald Geikie, 3. F.H. Newell, 4. Unidentified, 5. G.B. Shattuck, 6. R.D. Salisbury, 7. Unidentified, 8. L.M. Prindle, 9. H.F. Reid, 10. C.R. Van Hise, 11. Abbe J. Cleveland, Jr., 12. George W.Stose, 13. Unidentified, 14. E.V. d'Invilliers, 15. Dorsey, 16. F.H.H. Merrill, 17. L.A. Bauer, 18. A.C. Spencer, 19. W.J. McGee, 20. W.B. Clark, 21. Rufus M.Bagg, 22. S.W. McCallie, 23. Robert T. Hill, 24. H. Ries, 25. Frank D. Adams, 26. F.B. Peck, 27. T.W. Santon, 28. O.W. Fassig, 29. S.F. Emmons, 30. George F. Becker, 31. A.H. Hoen, 32. G.O. Smith, 33. J.F. Kemp, 34. Bailey Willis, 35. White?, 36 Ed B. Mattews, 37. Charles D. Walcott, 38. Maj. Powell, 39. G. Sanley Brown, 40. Jos. A. Holmes?, 41 C.W. Hayes, 42. F.J.H. Merrill, 44. H.S. Williams. Meeting of the Geological Society of America in Harpers Ferry, West Virginia. Jefferson County, West Virginia. May 1897. 1897. #1:/Portraits Collection/djs0359g ID. Diller, J.S. 359g Left to right: Charles D. Walcott, John W. Powell and Sir Archibald Geikie, probably during a meeting of the Geological Society of America in Harpers Ferry, West Virginia. 1897. #1:/Agnew Collection/aaf00001 ID. Agnew, A.F. 1 Platteville (Op), Decorah (Od), and Galena (Og) strata in 200 foot bluff west of State Route 81. Grant County, Wisconsin, ca. 1949. Published as figure 33 in U.S. Geological Survey, Professional Paper 274-K. 1956. #1:/Agnew Collection/aaf00002 ID. Agnew, A.F. 2 Exposure of typical dolomite of Prairie du Chien group in quarry in NE1/4NW1/4NW1/4 sec. 32, T. 7N., R.1.E. Iowa County, Wisconsin. ca. 1949. Published as figure 40 in U.S. Geological Survey, Professional Paper 274-K. 1956. #1:/Agnew Collection/aaf00003 ID. Agnew, A.F. 3 Crossbedded St. Peter Sandstone in roadcut along State Route 39, near center of NW1/4 sec. 1, T. 4N., R. 5 E. Iowa County, Wisconsin. ca. 1949. Published as figure 41 in U.S. Geological Survey, Professional Paper 274-K. 1956. #1:/Agnew Collection/aaf00004 ID. Agnew, A.F. 4 Pecatpmoca (Opp) and McGregor (Opm) members of Platteville Formation in roadcut U.S. Highway 151, 8 miles southwest of Platteville. Grant County, Wisconsin, ca. 1949. Published as figure 42 in U.S. Geological Survey, Professional Paper 274-K. 1956. #1:/Agnew Collection/aaf00005 ID. Agnew, A.F. 5 Glenwood Shale member (Opg) of Platteville Formation in contact with the Pecatonica (Opp) above the St. Peter (Osp) below in roadcut U.S. Highway 61. Grant County, Wisconsin. ca 1949. Published as figure 43 in U.S. Geological Survey, Professional Paper 274-K. 1956. #1:/Agnew Collection/aaf00006 ID. Agnew, A.F. 6 Type section of Quimbys Mill member (Opq) of Platteville Formation with Spechts Ferry (Ods) above and McGregor (Opm) below in quarry at Quimbys Mill. Lafayette County, Wisconsin. ca 1949. Published as figure 46 in U.S. Geological Survey, Professional Paper 274-K. 1956. #1:/Agnew Collection/aaf00007 ID. Agnew, A.F. 7 Type section of Spechts Ferry Shale member (Ods) of Decorah Formation overlain by Guttenberg Limestone member (Odg overhang); underlain by McGregor Limestone member (Opm) of Platteville Formation in quarry 200 yards southeast of Spechts Ferry station. Dubuque County, Iowa. ca 1949. Published as figure 47 in U.S. Geological Survey, Professional Paper 274-K. 1956. #1:/Agnew Collection/aaf00008 ID. Agnew, A.F. 8 Quimbys Mill member (Opq) of Platteville Formation overlain by Guttenburg Limestone lmember (Odg) of Decorah Formation in quarry at Calamine. Lafayette County, Wisconsin. ca 1949. Published as figure 48 in U.S. Geological Survey, Professional Paper 274-K. 1956. #1:/Agnew Collection/aaf00009 ID. Agnew, A.F. 9 Type section of Guttenberg Limestone (Odg) of Decorah Formation; overlain by Ion Dolomite member (Odi); underlain by Spechts Ferry Shale member (Ods) in roadcut U.S. Highway 52, 1 mile north of Guttenberg. Clayton County, Iowa. ca. 1949. Published as figure 49 in U.S. Geological Survey, Professional Paper 274-K. 1956. #1:/Agnew Collection/aaf00010 ID. Agnew, A.F. 10 Decorah Formation consisting of Ion Dolomite member (Odi) and Guttenberg Limestone member (Odg); overlain by Galena Dolomite (Og); underlain by Quimbys Mill member (Opg) of Platteville Formation in quarry at York Church. Green County, Wisconsin. ca. 1949. Published as figure 50 in U.S. Geological Survey, Professional Paper 274-K. 1956. #1:/Agnew Collection/aaf00011 ID. Agnew, A.F. 11 Carbonacaous shale partings between wavy dolomite beds of Guttenburg Limestone member (Odg) of Decoran Formation which rests on Quimbys Mill member (Opg) of Platteville Formation in quarry on Honey Creek. Green County, Wisconsin. ca. 1949. Published as figure 51 in U.S. Geological Survey, Professional Paper 274-K. 1956. #1:/Agnew Collection/aaf00012 ID. Agnew, A.F. 12 Effect of mineralizing solutions on Guttenberg Limestone member od Decorah Formation. Dark material is brown oil rock; argillaceous and shaly residum derived mainly from leaching of material similar to the adjoining calcareous rock. Liberty mine NE1/4NE1/4 sec. 16, T. 2 N., R. 1 E. Lafayette County, Wisconsin. ca. 1949. Published as figure 52 in U.S. Geological Survey, Professional Paper 274-K. 1956. #1:/Agnew Collection/aaf00013 ID. Agnew, A.F. 13 Honeycomb-like weathering of zone P on noncherty unit, and zone A of cherty unit of Galena Dolomite in roadcut State Route 11. Grant County, Wisconsin. ca. 1949. Published as figure 53 in U.S. Geological Survey, Professional Paper 274-K. 1956. #1:/Agnew Collection/aaf00014 ID. Agnew, A.F. 14 Maquoketa Shale (Om) overlain by dolomite of early Silurian age (Sd) in roadcut and quarry U.S. Highway 67 half a mile south of Bellevue. Jackson County, Iowa. ca. 1949. Published as figure 54 in U.S. Geological Survey, Professional Paper 274-K. 1956. #1:/Deiss Collection/dei00001 ID. Deiss, C. 1 Southeast side of dolomite deposit NE 1/4 sec. 27, T. 39 N., R. 39 E. Stevens County, Wasington. ca 1943. Published as figure 29 in U.S. Geological Survey, Bulletin 1027-C. 1955. #1:/Deiss Collection/dei00002 ID. Deiss, C. 2 Central part of quarry face, Sec 27, T. 39 N., R. 39 E. Stevens County, Wasington. ca 1943. Published as figure 31 in U.S. Geological Survey, Bulletin 1027-C. 1955. #1:/Deiss Collection/dei00003 ID. Deiss, C. 3 Continuous white quartz vein on intersecting joints. (specimen) Stevens County, Wasington. ca 1943. Published as figure 32 in U.S. Geological Survey, Bulletin 1027-C. 1955. #1:/Deiss Collection/dei00004 ID. Deiss, C. 4 Irregularly intersecting vuggy quartz veins in dark-gray dolomite. Stevens County, Wasington. ca 1943. Published as figure 33 in U.S. Geological Survey, Bulletin 1027-C. 1955. #1:/Deiss Collection/dei00005 ID. Deiss, C. 5 White quartz vein enclosing anglular fragments of dolomite. (speciment) Stevens County, Wasington. ca 1943. Published as figure 34 in U.S. Geological Survey, Bulletin 1027-C. 1955. #1:/Deiss Collection/dei00006 ID. Deiss, C. 6 Angular nodules of White quartz in dull gray dolomite. Stevens County, Wasington. ca 1943. Published as figure 35 in U.S. Geological Survey, Bulletin 1027-C. 1955. #1:/Deiss Collection/dei00007 ID. Deiss, C. 7 Large vein of white quartz. Sec 27, T. 39N., R. 39 E. Stevens County, Wasington. ca 1943. Published as figure 36 in U.S. Geological Survey, Bulletin 1027-C. 1955. #1:/Deiss Collection/dei00008 ID. Deiss, C. 8 Buff-colored quartz surrounding leached fragments of dolomite breccia. Stevens County, Wasington. ca 1943. Published as figure 37 in U.S. Geological Survey, Bulletin 1027-C. 1955. #1:/Deiss Collection/dei00009 ID. Deiss, C. 9 Bench of anchor member on the west side of the hill. Above the quarries. The Bullion (Cmb), Anchor (Cma) and Dawn (Cmd) members of the Monte Cristo dolomite are shown. Ivanpah quadrangle. Clark County, Nevada. 1943. Published as Figure 16-A in U.S. Geological Survey, Bulletin 973. 1952. #1:/Deiss Collection/dei00010 ID. Deiss, C. 10 Points and pits on the weathered surface of the Bullion member of the Monte Cristo dolomite. The flat part of the steel tape is 6 inches long. Ivanpah quadrangle. Clark County, Nevada. 1943. Published as Figure 16-B in U.S. Geological Survey, Bulletin 973. 1952. #1:/Deiss Collection/dei00011 ID. Deiss, C. 11 Lower part of the Bird Spring formation. The northwestern part of the hill is shown. In the foreground is the Bullion member of the Monte Cristo dolomite. Ivanpah quadrangle. Clark County, Nevada. 1943. Published as Figure 17-A in U.S. Geological Survey, Bulletin 973. 1952. #1:/Deiss Collection/dei00012 ID. Deiss, C. 12 Sloan Hill. Part of the fault breccia zone in the Bullion member of the Monte Cristo dolomite. The notehook at the top measures 8 3/8 by 5 1/4 inches. Ivanpah quadrangle. Clark County, Nevada. 1943. Published as Figure 17-B in U.S. Geological Survey, Bulletin 973. 1952. #1:/Deiss Collection/dei00013 ID. Deiss, C. 13 Sloan Hill. Small overthrust in the Crystal Pass limestone member of the Sultan limestone. Face of quarry 3. Note the mouths of the two tunnels. Ivanpah quadrangle. Clark County, Nevada. 1943. Published as Figure 18-A in U.S. Geological Survey, Bulletin 973. 1952. #1:/Deiss Collection/dei00014 ID. Deiss, C. 14 Sloan Hill. Drag fold on a small overthrust. Above the south tunnel in quarry 3. Compare with photograph number 13. The fold is at the left on the overthrust side of the fault. Stadia rod in foreground. Ivanpah quadrangle. Clark County, Nevada. 1943. Published as Figure 18-B in U.S. Geological Survey, Bulletin 973. 1952. #1:/Easton Collection/ewh00001 ID. Easton, W.H. 1 Western escarpment of Alaska Bench in sec. 36, T. 13 N., R. 19 E., as viewed north from the aerial beacon south of Health. The cliff-maker is the Alaska Bench limestone. Shale of the Cameron Creek formation makes the steep scree-strewn slope. Grassy slopes below it and beyond it at the second spur are on the Heath formation, but some grassy slopes in the valley are on shale in the Otter formation. Moccasin Mountains are on the horizon beyond Judith Basin. Fergus County, Montana. 1952. (Photo by J. E. Smedley). Published as plate 1-A in U. S. Geological Survey. Professional paper 348. 1962. #1:/Easton Collection/ewh00002 ID. Easton, W.H. 2 Easton, W. H. 2 Calcareous algae on an exposed bedding surface in the Otter formation in Stonehouse Canyon. The nodules are mostly less than 1 foot in diameter. Central Montana. 1952. (Photo by J. E. Smedley) Published as plate 1-B in U. S. Geological Survey. Professional paper 348. 1962. #1:/Easton Collection/ewh00003 ID. Easton, W.H. 3 Heath formation in a road cut south of Heath in sec. 35, T. 14 N., R. 19 E. Black fissile shale with thin stringers of siltstone and limestone in the upper part of the Heath formation, as shown here, weather to smooth grassy slopes. Fergus County, Montana. 1952. Published as plate 1-C in U. S. Geological Survey. Professional paper 348. 1962. #1:/Easton Collection/ewh00004 ID. Easton, W.H. 4 Charles (?) or Kibbey(?) strata compromising beds 85 to 89 of the measured section at Durfee Creek in sec. 24, T. 12 N., R. 22 E. The top of the Madison group (bed 90) is shown in the lower left corner and red beds of the Kibbey sandstone are visible near the upper left corner. Hackly gypsiferous limestone (bed 86) comprises the upper half of the bluff and flaggy sandstone (bed 87), the lower half. Contorted strata, brecciation, and minor features of collapse structure reflect the solution of 14 feet of bedded gypsum from the horizon of the grassy and brushy slope below the bluff. Two hammers in the center of the photograph give the scale; the bluff is 20 feet high. Fergus County, Montana. 1952. Published as plate 2-A in U. S. Geological Survey. Professional paper 348. 1962. #1:/Easton Collection/ewh00005 ID. Easton, W.H. 5 Banded red sandstone strata of the Kibbey sandstone overlain by green shale in the Otter formation. Above the arrows indicating the pre-Jurassic unconformity lies the Ellis group. View along Belt Creek in sec, 11, T. 17 N., R, 6 E. Undulations in the bedding of the Kibbey sandstone are probably caused by collapse subsequent to removal or heaving due to hydration of one or more gypsum or anhydrite beds in the lower part of the formation, Beds 11 to 16 of the measured section on Belt Creek were measured along these bluffs. Cascade County, Montana, 1952. Published as plate 2-B in U. S. Geological Survey. Professional paper 348. 1962. #1:/Easton Collection/ewh00008 ID. Easton, W.H. 8 Big Snowy group foraminifera, sponges, and corals. Central Montana. n.d. Published as plate 3 in U.S. Geological Survey. Professional paper 348. 1962. #1:/Easton Collection/ewh00009 ID. Easton, W.H. 9 Big Snowy group conularids, echinoderms, and brachiopods. Central Montana. n.d. Published as plate 4 in U.S. Geological Survey. Professional paper 348. 1962. #1:/Easton Collection/ewh00010 ID. Easton, W.H. 10 Big Snowy group brachiopods. Central Montana. n.d. Published as plate 5 in U.S. Geological Survey. Professional paper 348. 1962. #1:/Easton Collection/ewh00011 ID. Easton, W.H. 11 Big Snowy group brachiopods. Central Montana. n.d. Published as plate 6 in U.S. Geological Survey. Professional paper 348. 1962. #1:/Easton Collection/ewh00012 ID. Easton, W.H. 12 Big Snowy group brachiopods. Central Montana. n.d. Published as plate 7 in U.S. Geological Survey. Professional paper 348. 1962. #1:/Easton Collection/ewh00013 ID. Easton, W.H. 13 Big Snowy group brachiopods. Central Montana. n.d. Published as plate 8 in U.S. Geological Survey. Professional paper 348. 1962. #1:/Easton Collection/ewh00014 ID. Easton, W.H. 14 Big Snowy group brachiopods. Central Montana. n.d. Published as plate 9 in U.S. Geological Survey. Professional paper 348. 1962. #1:/Easton Collection/ewh00015 ID. Easton, W.H. 15 Big Snowy group brachiopods. Central Montana. n.d. Published as plate 10 in U.S. Geological Survey. Professional paper 348. 1962. #1:/Easton Collection/ewh00016 ID. Easton, W.H. 16 Big Snowy group brachiopods. Central Montana. n.d. Published as plate 11 in U.S. Geological Survey. Professional paper 348. 1962. #1:/Easton Collection/ewh00017 ID. Easton, W.H. 17 Big Snowy group brachiopods, mollusks, and worm tubes. Central Montana. n.d. Published as plate 12 in U.S. Geological Survey. Professional paper 348. 1962. #1:/Easton Collection/ewh00018 ID. Easton, W.H. 18 Big Snowy group mollusks, Arthropods, and vertebrates. Central Montana. n.d. Published as plate 13 in U.S. Geological Survey. Professional paper 348. 1962. #1:/Lewis Collection/lge00001 ID. Lewis, G.E. 1 Indians herding sheep and llamas along the Quito-Riobamba highway near Riobamba. Road cut in pyro-clastics from Chimborazo volcano. Chimborazo, Ecuador. 1946. #1:/Lewis Collection/lge00002 ID. Lewis, G.E. 2 Indians herding sheep and llamas along the Quito-Riobamba highway near Riobamba. Road cut in pyro-clastics from Chimborazo volcano. Chimborazo, Ecuador. 1946. #1:/Lewis Collection/lge00005 ID. Lewis, G.E. 5 U.S.A.F. Mission C-47 at Cotocollao Airfield, Quito. Left to right: TS?, Embassy Attache?, M. J. Gatewood, Maj. USAF (pilot), Romeo Cordovez, Wallace Estill, TS?, G.E. Lewis. Pichincha, Ecuador. 1946. #1:/Lewis Collection/lge00006 ID. Lewis, G.E. 6 View westward across Quito to El Pichincha volcano. Pichincha, Ecuador. 1946. #1:/Lewis Collection/lge00007 ID. Lewis, G.E. 7 View westward from Quito-Riobamba highway to El Chimborazo volcano. Chimborazo, Ecuador. 1946 #1:/Lewis Collection/lge00008 ID. Lewis, G.E. 8 Topmost crags of El Altar rising through clouds. Chimborazo, Ecuador. 1946 #1:/Lewis Collection/lge00009 ID. Lewis, G.E. 9 View northward toward El Antisana. Napo Pastaza-Pichincha, Ecuador. 1946. #1:/Lewis Collection/lge00010 ID. Lewis, G.E. 10 View southward over the intercordilleran depression toward 11 Cotopaxi volcano. Napo Pastaza-Pichincha, Ecuador. 1946. #1:/Lewis Collection/lge00011 ID. Lewis, G.E. 11 View of El Cotopaxi, looking southward, with El Chimborazo on right skyline. Chimborazo, Ecuador. 1946. #1:/Lewis Collection/lge00012 ID. Lewis, G.E. 12 View of El Cotopaxi, looking southward, with El Chimborazo on right skyline. Chimborazo, Ecuador. 1946. #1:/Lewis Collection/lge00013 ID. Lewis, G.E. 13 View of El Cotopaxi, looking southward, with El Chimborazo on right Skyline. Chimborazo, Ecuador. 1946. #1:/Lewis Collection/lge00014 ID. Lewis, G.E. 14 View northeastward: El Cotopaxi in foreground, El Antisana in right middle distance, El Cayambe on left skyline. #1:/Lewis Collection/lge00015 ID. Lewis, G.E. 15 El Cotopaxi: snow and ice on northeast slopes. Leon-Napo Pastaza-Pichineha, Ecuador. 1946 #1:/Lewis Collection/lge00016 ID. Lewis, G.E. 16 El Cotopaxi: crater, view southeastward. Leon-Napo Pastaza-Pichineha, Ecuador. 1946 #1:/Lewis Collection/lge00017 ID. Lewis, G.E. 17 El Cotopaxi: crater, view southward. Leon-Napo Pastaza-Pichineha, Ecuador. 1946 #1:/Lewis Collection/lge00018 ID. Lewis, G.E. 18 El Sangay, from the west. Napo Pastaza, Ecuador. 1946. #1:/Lewis Collection/lge00021 ID. Lewis, G.E. 21 El Sangay, from the southwest. Napo Pastaza, Ecuador. 1946. #1:/Lewis Collection/lge00045 ID. Lewis, G.E. 45 El Sangay from Culebrillas Tambo. Wenceslao, Roberto Meriao, and G.E. Lewis. Canar, Ecuador. 1946. #1:/Lewis Collection/lge00046 ID. Lewis, G.E. 46 Culebrillas Valley from trail in Andes to the northwest; both valley walls completely scarred by landslides, and valley floor shows typical landslide topography. Canar, Ecuador. 1946. #1:/Lewis Collection/lge00053 ID. Lewis, G.E. 53 Coming down out of rain forest in upper Alao Valley, Wallace Estill on lead horse. Chimborazo, Ecuador. 1946. #1:/Lewis Collection/lge00054 ID. Lewis, G.E. 54 View northeastward, uppon Alao Valley. Wallace Estill (left), and G.E. Lewis (right). Chimborazo, Ecuador. 1946. #1:/Lewis Collection/lge00055 ID. Lewis, G.E. 55 Ecuadorian Army Jeeps in Alao Valley, with Sergeants Palacios and Pacheco. Chimborazo, Ecuador. 1946. #1:/Lewis Collection/lge00056 ID. Lewis, G.E. 56 View westward to El Tulabug from lower Alao Valley. Chimborazo, Ecuador. 1946. #1:/Lewis Collection/lge00057 ID. Lewis, G.E. 57 Pleistocene lake beds in road cut on Riobamba-Licto Road. Chimborazo, Ecuador. 1946. #1:/Lewis Collection/lge00058 ID. Lewis, G.E. 58 Climbing eastward out of upper Guargualla Valley toward Llullumpala Pingo (Pass); western valley wall scarred by landslides. Chimborazo, Ecuador. 1946. #1:/Lewis Collection/lge00059 ID. Lewis, G.E. 59 Tres Cruces Tambo: left to right: Sgt. Nunez, Corp. Huilka, Romeo Cordovez (mounted) and Bonafacio. Chimborazo, Ecuador. 1946. #1:/Lewis Collection/lge00060 ID. Lewis, G.E. 60 View down upper Guargualla Valley from Llullimpala Pungo. Chimborazo, Ecuador. 1946. #1:/Lewis Collection/lge00061 ID. Lewis, G.E. 61 View westward toward Tres Cruces Tambo from Arenal de Pancahuan. Napo Pastaza, Ecuador. 1946. #1:/Lewis Collection/lge00062 ID. Lewis, G.E. 62 Arenal de Pancahuan. Napo Pastaza, Ecuador. 1946. #1:/Lewis Collection/lge00065 ID. Lewis, G.E. 65 Butchering venison, Carniceria Tambo. Napo Pastaza, Ecuador. 1946. #1:/Lewis Collection/lge00066 ID. Lewis, G.E. 66 Indian peons (Angel and Santos) barbecuing venison, Carniceria Tambo. Napo Pastaza, Ecuador. 1946. #1:/Lewis Collection/lge00067 ID. Lewis, G.E. 67 Peons carrying Nunez and Huilka across stream. Napo Pastaza, Ecuador. 1946. #1:/Lewis Collection/lge00068 ID. Lewis, G.E. 68 Anticline in pre-Cambrian metamorphics at Hacienda Guargualla. Napo Pastaza, Ecuador. 1946. #1:/Lewis Collection/lge00083 ID. Lewis, G.E. 83 Universidad de Guayaquil. Guayas, Ecuador. 1946. #1:/Lewis Collection/lge00084 ID. Lewis, G.E. 84 Universidad de Guayaquil, Charles Darwin bust. Guayas, Ecuador. 1946. #1:/Lewis Collection/lge00093 ID. Lewis, G.E. 93 Party at home of Borneo Cordovez. Left to right, Lt. Mino, Dr. Galo Moncayo, Romeo Cordovez, G.E. Lewis, Col. Edmundo Carvajal (Commandant of the Ecuadorian Air Force), Luis Noboa, and Andres Franco. Quito. Pichincha, Ecuador. 1946. #1:/Lewis Collection/lge00096 ID. Lewis, G.E. 96 Jivaro Indian man and woman on jungle trail 1/2 mile south of airstrip at Sucua with more Jivaros dressed in Sunday best. The Jivaros are the headhunters who kill with poisoned blowgun darts (curare) and then shrink the victim's head to the size of an orange. Santiago-Zamora, Ecuador. 1950. #1:/Lewis Collection/lge00097 ID. Lewis, G.E. 97 Jivaro Indian man and woman on jungle trail 1/2 mile south of airstrip at Sucua with more Jivaros dressed in Sunday best. Note: the Jivaros are the headhunters who kill with poisoned blowgun darts (curare) and then shrink the victim's head to the size of an orange. Santiago-Zamora, Ecuador. 1950. #1:/Lewis Collection/lge00098 ID. Lewis, G.E. 98 Upper Amazon Basin: braiding channels of Rio Pastaza some miles south east Mera. Napo Pastaza, Ecuador. 1950. #1:/Lewis Collection/lge00101 ID. Lewis, G.E. 101 View westward up Rio Pastaza gorge, from cliff-top just north of Banos. North abutment of bridge is on old pre-Cambrian metamorphics (dip 90 degrees, strike N-S) of old valley now being re-excavated by river. Valley fill of volcanics and sediments forms a south cannon wall. Tungurahua?, Ecuador. 1950. #1:/Lewis Collection/lge00104 ID. Lewis, G.E. 104 Columnar-jointed lavas that crop out in south side of valley of Rio Patate, between Pelileo and Banos, just 1 km. west of mouth of Rio Chambo. Tungurahua, Ecuador. 1950. #1:/Lewis Collection/lge00118 ID. Lewis, G.E. 118 Walls of old monastery at Guano, abandoned many years ago. Sisters of Charity buildings beyond. Chimborazo, Ecuador. 1950. #1:/Ambato Earthquake Collection/lge00120 ID. Lewis, G.E. 120 Damage done by Ambato Earthquake August 5, 1949. [6.8 on the Richter Scale and over 6,000 dead]. Another house in Guano; walls here are rubble with mud and rubble fill. Chimborazo, Ecuador. 1950. #1:/Ambato Earthquake Collection/lge00121 ID. Lewis, G.E. 121 Damage done by Ambato Earthquake August 5, 1949. [6.8 on the Richter Scale and over 6,000 dead]. Main plaza of Guano. This terrace had 4 reinforced concrete light poles: 3 were thrown down, and 1 undamaged. Chimborazo, Ecuador. 1950. #1:/Ambato Earthquake Collection/lge00122 ID. Lewis, G.E. 122 Damage done by Ambato Earthquake August 5, 1949. [6.8 on the Richter Scale and over 6,000 dead]. Church on east side of main plaza. Guano. Poor masonry walls of inferior material, poorly cemented, as an exterior and interior veneer, with soft mortar, mud, and rubble fill (note exposed fill between N. tower and central belfry). Chimborazo, Ecuador. 1950. #1:/Lewis Collection/lge00123 ID. Lewis, G.E. 123 Successive layers of pumiceous ash separated by old soils, near Tiopollo. Eruptives from Cotopaxi Volcano. Ecuador. 1950. #1:/Ambato Earthquake Collection/lge00132 ID. Lewis, G.E. 132 Damage done by Ambato Earthquake August 5, 1949. [6.8 on the Richter Scale and over 6,000 dead]. Ruins of church at Santa Rosa. Typical rotten construction. 1950. Tungurahua, Ecuador. 1950. #1:/Ambato Earthquake Collection/lge00134 ID. Lewis, G.E. 134 Damage done by Ambato Earthquake August 5, 1949. [6.8 on the Richter Scale and over 6,000 dead]. The hospital, one of the many buildings in the medical center (on the NW. outskirts of Ambato) all of which were not quite finished new, and very poor construction, all a total loss. Tungurahua, Ecuador. 1950. #1:/Lewis Collection/lge00135 ID. Lewis, G.E. 135 The great landslide where more than 100 quarry workers were entombed alive in quarry of "Pichilata" (rotten pyroclastics) at Quillanloma across Rio Culapachan west of San Miguelito. Tungurahua, Ecuador. 1950. #1:/Lewis Collection/lge00140 ID. Lewis, G.E. 140 Bed of black ash overlain by bed of white ash (diatomaceous?) from old lake bottom (?) in which aquatic plants were buried in growth position, died, decayed, and molds of their stems were filled up by wet black ash forced up from below (?). Note black streaks in white bed overlying black bed. East side of Culapachan canyon, road cut, Ambato-Pillaro road. Tungurahua, Ecuador. 1950. #1:/Ambato Earthquake Collection/lge00145 ID. Lewis, G.E. 145 Damage done by Ambato Earthquake August 5, 1949. [6.8 on the Richter Scale and over 6,000 dead]. Rammed earth walls of damaged houses on Pillaro-Marcos Espinel Road, tumbled down by earthquake. Note tied pole roof supports. Tungurahua, Ecuador. 1950. #1:/Ambato Earthquake Collection/lge00175 ID. Lewis, G.E. 175 Head of "La Moya de Pelileo," south of Pelileo. Note fissured and folded boggy fill, and surrounding springs. Bent pipe in foreground proves movement of fill downvalley toward Pelileo and slide during 5 August 1949 quake. Tungurahua, Ecuador. 1950. #1:/Ambato Earthquake Collection/lge00176 ID. Lewis, G.E. 176 Pelileo, main plaza. Surrounding wall was thrown down on north and east sides but not on south and west Lamp posts of iron and steel still stand although embedded in slabs of mortar only 3 inches x 15 inches x 15 inches. Tungurahua, Ecuador. 1950. #1:/Ambato Earthquake Collection/lge00177 ID. Lewis, G.E. 177 Pellleo, main plaza. Surrounding wall was thrown down on north and east sides but not on south and west Lamp posts of iron and steel still stand although embedded in slabs of mortar only 3 inches x 15 inches x 15 inches. Msgr. Echevarria (2nd from left), Pres. of Junta Provincial de Reconstruccion; Gov. R. Vela B. (3rd from left); 2 other members of Junta; and architect Sixto Duran B. (extreme right). Tungurahua, Ecuador. 1950. #1:/Ambato Earthquake Collection/lge00178 ID. Lewis, G.E. 178 Pelileo, main plaza, from ruins of church. Tungurahua, Ecuador. 1950. #1:/Ambato Earthquake Collection/lge00179 ID. Lewis, G.E. 179 Ruins of Pelileo. View southward. Tungurahua, Ecuador. 1950. #1:/Prossesional paper 700-B/lge00197 ID. Lewis, G.E. 197 Two fragments of horn cores of Pleistocene Bison. Meter stick, numbered in centimeters, included for scale which is about one-fifth natural size. Upper specimen (Simobison)? alleni?, U. S. Museum No. 25913. Specimen found on west bank of Cherry Creek in NE1/4 sec. 30, T. 5 S., R. 66 W. Arapahoe County, Colorado. 1966. Lower specimen (Gigantobison) latifrons, U. S. National Museum No. 25912. Specimen found in Fremont County, Colorado. 1967. Published as figure 1, p. 138, in U. S. Geological Survey. Professional paper 700-B. 1970. #1:/Lewis Collection/lge00198 ID. Lewis, G.E. 198 View of bones of sauropod dinosaurs in outcrop of Morrison Formation at the Howe Ranch quarry near Cloverly. Barnum Brown, Curator of Fossil Reptiles, American Museum of Natural History. Leavitt Reservoir quadrangle, Big Horn County, Wyoming. 1934. #1:/Prossesional paper 503/lge00199 ID. Lewis, G.E. 199 A natural mould of a series of neural spines of the rhachitomous amphibian Platyhystrix rugosus. The anterior end lies to the left. Fragments of bone are visible in places. Early Permian Vertebrates from the Cutler Formation of the Placerville area, Colorado. 1959. Published as Fig. 5, U.S.G.S. Professional Paper 503. 1965. #1:/Prossesional paper 503/lge00200 ID. Lewis, G.E. 200 A latex cast taken from MCZ 2982, the specimen of Plathyhstrix shown on figure 5. The anterior end lies to the right. The white areas represent casts of bone impressions in the specimen; the gray areas represent restoration. Early Permian Vertebrates from the Cutler Formation of the Placerville area, Colorado. 1959. Published as Fig. 6, U.S.G.S. Professional Paper 503. 1965. #1:/Prossesional paper 503/lge0201a ID. Lewis, G.E. 201a Ophiacodon sp., MCZ 2977. Sketch A: Ground transverse section through the first vertebra in the string. Unshaded areas represent matrix. Early Permian Vertebrates from the Cutler Formation of the Placerville area, Colorado. 1959. Published as Fig. 10-A, U.S.G.S. Professional Paper 503. 1965. #1:/Prossesional paper 503/lge0201b ID. Lewis, G.E. 201b Ophiacodon sp., MCZ 2977. Sketch B: The strong of vertebra in lateral view. Unshaded areas represent matrix. Early Permian Vertebrates from the Cutler Formation of the Placerville area, Colorado. 1959. Published as Fig. 10-B, U.S.G.S. Professional Paper 503. 1965. #1:/Bulletin 975-D/lge00203 ID. Lewis, G.E. 203 View westward across south end of Santiago Basin along Caribbean Coast. The entrance to Santiago Bay is in foreground; Turquino Range of the Sierra Maestra is in the distance. Photograph by U.S. Navy. Geology of South-central Oriente, Cuba. Oct. 1940-Oct. 1945. Published as Fig. 21, U.S.G.S. Bulletin 975-D. 1955. #1:/Bulletin 975-D/lge00204 ID. Lewis, G.E. 204 View northward across the Santiago Bay Lowland to Pelado Range (P) and Boniato Ridge (B). Note the quarry in Cuabitas limestone lentil of the Cobre formation at extreme right (ls). Photograph by U.S. Navy. Geology of South-central Oriente, Cuba. Oct. 1940-Oct. 1945. Published as Fig. 22, U.S.G.S. Bulletin 975-D. 1955. #1:/Bulletin 975-D/lge00205 ID. Lewis, G.E. 205 Aerial photograph, stereopair showing parts of northern Santiago Bay Lowland and the Valley and Ridge section of Turquino Range. Note quarries in Cuabitas limestone lentil of Cobre formation (ls) and small basalt stock (b). Photograph by U.S. Navy. Geology of South-central Oriente, Cuba. Oct. 1940-Oct. 1945. Published as Fig. 23, U.S.G.S. Bulletin 975-D. 1955. #1:/Bulletin 975-D/lge00206 ID. Lewis, G.E. 206 Aerial view southward across La Prueba Plateau (P) to Gran Piedra Range of Sierra Maestra and Santiago Basin (SB) . Sabanilla Lowland (S), Cuatro Caminos Hills (C), Headwaters Hills (H), Boniato Piedmont (BP) and San Luis Lowland (SL) in middle distance. La Galleta Lowland (G), Loreto Mesa (L), Emilia Valley (V), Camarones Heights (CH), La Gran Piedra peak (GP), Barbacoa Pass (B), Boniato Ridge (BR), and Escandel Hills (E) in far distance. Photograph by U.S. Air Force. Geology of South-central Oriente, Cuba. Oct. 1940-Oct. 1945. Published as Fig. 24, U.S.G.S. Bulletin 975-D. 1955. #1:/Bulletin 975-D/lge00207 ID. Lewis, G.E. 207 Aerial photograph, stereopair showing parts of Baconao Ridge (B), Emilia Valley (V), and Loreto Mesa (L), Gran Piedra Range. Photograph by U.S. Navy. Geology of South-central Oriente, Cuba. Oct. 1940-Oct. 1945. Published as Fig. 25, U.S.G.S. Bulletin 975-D. 1955. #1:/Lewis Collection/lge00208 ID. Lewis, G.E. 208 Aerial view northward across Nipe Highlands and Canto Lowlands. San Nicolas Hills (N), Miranda Lowland (L), and Monte Picote (P) in foreground. Cayo del Rey Hills (E) and Pedernal Karstland (K) in middle distance. Note west and north rims of Pedernal Karstland where faults have been located on map. Canto Plain (C), marginal Hogbacks (H) and Central Massif (M) of Sierra de Nipe in far distance. Photograph by U.S. Air Force. Geology of South-central Oriente, Cuba. Oct. 1940-Oct. 1945. #1:/Bulletin 975-D/lge00209 ID. Lewis, G.E. 209 Reef limestone occuring as small lenses in the Habana (?) formation, weathering out on grassy slopes underlain by clastic rocks. La Burra Basin, locality 245. Geology of South-central Oriente, Cuba. Oct. 1940-Oct. 1945. Published as Fig. 27, U.S.G.S. Bulletin 975-D. 1955. #1:/Bulletin 975-D/lge00210 ID. Lewis, G.E. 210 Hogback at west end of monocline of Boniato Piedmont cut by the superposed Rio Yarabo. Charco Redondo limestone member of Cobre formation crops out on dip slope and upper 2 feet 3 inches of the scarp, pyroclastic rocks of the Cobre formation, at base of the scarp. San Luis rocks and Quaternary alluvium floor Palma Lowland beyond dip slope. Geology of South-central Oriente, Cuba. Oct. 1940-Oct. 1945. Published as Fig. 28, U.S.G.S. Bulletin 975-D. 1955. #1:/Bulletin 975-D/lge00211 ID. Lewis, G.E. 211 Gradational contact between thick-bedded Charco Redondo limestone member on hilltop and underlying thin-bedded tuff of Cobre formation with subordinate limestones underlain in turn by massive nonlimy pyro-clastics in foreground, along Central Highway just south of locality 87. Geology of South-central Oriente, Cuba. Oct. 1940-Oct. 1945. Published as Fig. 29, U.S.G.S. Bulletin 975-D. 1955. #1:/Bulletin 975-D/lge00212 ID. Lewis, G.E. 212 Well-bedded tuff and interbedded massive agglomerate of Cobre formation along Carretera Central 1 km. E of Puerto de Moya. Small, high-angle transverse faults are filled with white alteration products. Geology of South-central Oriente, Cuba. Oct. 1940-Oct. 1945. Published as Fig. 30, U.S.G.S. Bulletin 975-D. 1955. #1:/Bulletin 975-D/lge00215 ID. Lewis, G.E. 215 Conglomerate and sandstone overlying thin-bedded shale in San Luis formation outcrops on north bank of Rio Yarayabo, 0.5 km. east of locality 90. Geology of South-central Oriente, Cuba. Oct. 1940-Oct. 1945. Published as Fig. 33, U.S.G.S. Bulletin 975-D. 1955. #1:/Bulletin 975-D/lge00216 ID. Lewis, G.E. 216 Conglomerate-filled channel in shale, overlain by sandstone, in outcrop of San Luis formation on west bank of Rio Contramaestre, at locality 34. Geology of South-central Oriente, Cuba. Oct. 1940-Oct. 1945. Published as Fig. 34, U.S.G.S. Bulletin 975-D. 1955. #1:/Bulletin 975-D/lge00217 ID. Lewis, G.E. 217 Conglomerate-filled channel enclosing blocks of sandstone, in limy shale of San Luis formation, near locality 34. Scale is indicated by lower block, 1 meter thick. Note tilt of upper block. Geology of South-central Oriente, Cuba. Oct. 1940-Oct. 1940. Published as Fig. 35, U.S.G.S. Bulletin 975-D. 1955. #1:/Bulletin 975-D/lge00218 ID. Lewis, G.E. 218 Camarones Heights, type locality of Camarones conglomerate member of San Luis formation; summit about 670 meters altitude. Contacts shown in white: Cobre formation (Tc) underlies shale of the San Luis formation (Tsl) at base of slope in saddle left of peak; shale is overlain by Camarones conglomerate member. (Tslc) at break in slope; conglomerate well exposed in steep-sided ravines. Photographs by Stepen Taber. Geology of South-central Oriente, Cuba. Oct. 1940-Oct. 1945. Published as Fig. 36, U.S.G.S. Bulletin 975-D. 1955. #1:/Bulletin 975-D/lge00219 ID. Lewis, G.E. 219 Outcrop of Camarones conglomerate member of San Luis formation, in bed of Rio Barrancas 4.8 km. southeast of La Maya. Geology of South-central Oriente, Cuba. Oct. 1940-Oct. 1945. Published as Fig. 37, U.S.G.S. Bulletin 975-D. 1955. #1:/Bulletin 975-D/lge00220 ID. Lewis, G.E. 220 Oligocine rock outcrops in quarry in Morcate Ridge at Morcate, locality 96. Chalky white Oligocene foraminiferite exposed in quarry face; grassed-over quarry floor is fine-grained conglomerate and conglomerate sandstone of San Luis formation. Geology of South-central Oriente, Cuba. Oct 1940-1945. Published as Fig. 38, U.S.G.S. Bulletin 975-D. 1955. #1:/Bulletin 975-D/lge00221 ID. Lewis, G.E. 221 Columnar-jointed, sill-like body of basalt in pyroclastic rocks of Cobre formation along Central Highway, about 1 km. east of Puerto de Moya. Intrusive rock cuts across bedding at low angle. Geology of South-central Oriente, Cuba. Oct. 1940-Oct. 1945. Published As Fig. 39, U.S.G.S. Bulletin 975-D. 1955. #1:/Bulletin 975-D/lge00222 ID. Lewis, G.E. 222 Aerial photograph stereopair showing parts of Bontato Ridge (B) and trellis drainage (t) in Valley and Ridge section, Turquino Range. Photograph by U.S. Navy. Geology of South-central Oriente, Cuba. Oct. 1940-Oct. 1945. Published as Fig. 40, U.S.G.S. Bulletin 975-D. 1955. #1:/Bulletin 975-D/lge00223 ID. Lewis, G.E. 223 South-dipping normal fault in pyroclastic rocks of Cobre formation exposed on scarp of Boniato Ridge along Central Highway 2.5 km. northwest of El Cobre. Massive agglomerate and tuff of hanging wall on right above bedded tuff of foot wall on left. Geology of South-central Oriente, Cuba. Oct. 1940-Oct. 1945. Published as Fig. 41, U.S.G.S, Bulletin 975-D. 1955. #1:/Bulletin 975-D/lge00224 ID. Lewis, G.E. 224 Aerial photograph stereopair showing part of Valley and Ridge section of Turquino Range. Note oblique trend of Pelado Ridge (P) as compared to more northeasterly trend of strike ridges. Photograph by U.S. Navy. Geology of South-central Oriente, Cuba. Oct. 1940-Oct. 1945. Published as Fig. 43, U.S.G.S. Bulletin 975-D. 1955. #1:/Bulletin 975-D/lge00225 ID. Lewis, G.E. 225 Aerial photograph stereopair showing northwest part of Pedernal Karstland (K) whose rims are localized by faults that separate Pedernal Karstland from Central Massif of Sierra de Nipe (M). Geology of South-central Oriente, Cuba. Oct. 1940-Oct. 1945. Published as Fig. 44, U.S.G.S. Bulletin 975-D. 1955. #1:/Paricutin Volcano-Bulletin 965-D/fwf00001 ID. Foshag, W.F. 1 Heavy cineritic activity. The Quitzocho ridge from the base of the cone to the right. Note small pond formed by a lava dam. Photograph taken from the northeast. Par£cutin Volcano. Michoacan, Mexico. July 25, 1943. Published as plate 25-B in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00002 ID. Foshag, W.F. 2 Chimney on the north flank of the cone on the site of one of the eruptive vents of June, after the cone had been restored by uninterrupted ash fall. Lava of June on ash-covered lavas of the Quitzocho flow. View from Cerro de Jaratiro. Paricutin Volcano. Michoacan, Mexico. Early July, 1943. (Photograph by Ezequiel Ordonez) Published as plate 26-A in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00003 ID. Foshag, W.F. 3 Heavy explosions with large "bombs and moderate vaporous eruptive column. The break of the cone of early July now largely restored. An old crater of Cerro de Jaratiro in the foreground. Photograph taken from Cerro de Jaratiro. Paricutin Volcano. Michoacan, Mexico. July 31, 1943. Published as plate 26-B in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00005 ID. Foshag, W.F. 5 Tremendous bursts of huge lava bubbles in crater, accompanied by flashing arcs, yielding huge tatters of viscous lava. Ejected masses of viscous lava flow down the slopes of the cone. Dark area in upper center is a weak eruptive column. Photograph taken from Cerro de Jaratiro. Paricutin Volcano. Michoacan, Mexico. August 1, 1943. Published as plate 27-B in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00006 ID. Foshag, W.F. 6 Cone viewed from Cerro de Jaratiro after the break in late July. Tremendous explosion from the north crater vent and heavy emission from south vent. Quitzocho ridge in the middle ground; ash-covered Quitzocho lava with salt-incrusted fuma-roles in foreground. Paricutin Volcano. Michoacan, Mexico. July 26, 1943. Published as plate 28-A in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00007 ID. Foshag, W.F. 7 The break in the cone in early afternoon. Huge jets of black ash play from the broken segment of the cone. The rocks, "Los Faroles," that crown the ridge are beginning to move to the left. One of the craters of Cerro de Jaratiro is in the foreground. Photograph taken from Cerro de Jaratiro. Paricutin Volcano. Michoacan, Mexico. August 2, 1943. Published as plate 28-B in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00008 ID. Foshag, W.F. 8 Early stage in the growth of Quitzocho ridge by injection of lava below the ash during the lava outbreak of June 10. Paricutin Volcano. Michoacan, Mexico. June 10, 1943. Published as plate 29-A in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00009 ID. Foshag, W.F. 9 Lover slopes of Cerro de Caniejuata on the left, ash-covered Quitzocho ridge in the distance. Photograph taken from the south-vest. Paricutin Volcano. Michoacan, Mexico. January 9, 1944. Published as plate 34-A in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00010 ID. Foshag, W.F. 10 Fissures and displacement in ash along a "tremer zone" at the foot of Mesa de Coejarao, west of the cone. Paricutin Volcano. Michoacan, Mexico. January 8, 1944. Published as plate 34-B in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00011 ID. Foshag, W.F. 11 First day of the Taqui lava flow. Three vents yielded a continuous flow of lava. Steaming lower slopes of the cone to the upper left; lower slopes of Cerro de Canicjuata in the foreground. The varying degrees of incandescence mark lava surges. Photograph taken from the northwest. Paricutin Volcano. Michoacan, Mexico. January 8, 1944. Published as plate 35-A in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00012 ID. Foshag, W.F. 12 Area of the Taqui vents, which are on the lover slope, an eruptive chimney upon an upper knoll. Taqui lava flow on the lower left; slopes of Mesa de Cocjarao lower right. Paricutin Volcano. Michoacan, Mexico. January 9, 1944. Published as plate 35-B in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00013 ID. Foshag, W.F. 13 Area of the Taqui vents (now buried), now called Mesa de Los Hornitos. Pahoehoe lava from "volcanoito" to the left. Photograph taken from the north. Paricutin Volcano. Michoacan, Mexico. March 21, 1944. Published as plate 36-A in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00014 ID. Foshag, W.F. 14 Surface of the Taqui lava flow showing the hornito fields. Abundant yellow and orange salts colored the area, Mesa de Los Hornitos. Photograph taken from the northeast. Paricutin Volcano. Michoacan, Mexico. May 24, 1944. Published as plate 36-B in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00015 ID. Foshag, W.F. 15 Interior of crater with one active vent. The bench is a remnant of a higher floor of the crater. Aerial photo taken from the south. Parlcutin Volcano. Michoacan, Mexico. July 31, 1945. Published as plate 51 in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00016 ID. Foshag, W.F. 16 The new volcano broke forth in the valley of Quitzocho-Cuiyusuru, which lay between Cerro de Jaratiro (left), Cerro de Cainiro (far center), and Cerro de Canicjuata (right). Paricutin village lies near the foot of Cerro de Canicjuata. The fields of San Juan Parangaricutiro are in the foreground. Taken from Ticuiro, near San Juan Parangaricutiro, at 5:30 P.M. Paricutin Volcano. Michoacan, Mexico. February 20, 1943. Published as plate 16-B in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00017 ID. Foshag, W.F. 17 The new cone, about 30 meters high, appears above the treetops. Taken from the northeast. Parlcutin Volcano. Michoacan, Mexico. February 21, 1943. (Photo by S. Ceja) Published as plate 17-A in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00018 ID. Foshag, W.F. 18 The new cone viewed from the northeast. Great quantities of ejected bombs and lapilli caused the new cone to grow rapidly. Vapors of the first (Quitzocho) lava flow are around the base of the cone. Cerros de Tacitaro in the right background. Paricutin Volcano. Michoacan, Mexico. February 22, 1943. (Photo by R. Morrow) Published as plate 17-B in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00019 ID. Foshag, W.F. 19 Vaporous eruptive column with little ash. Taken from the northeast. Paricutin Volcano. Michoacan, Mexico. February 24, 1943. (Photo by E. Ordonez) Published as plate 18-A in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00020 ID. Foshag, W.F. 20 Heavy emission of bombs with moderate eruptive column. Llano de Quitzocho in the foreground; Quitzocho lava flow with abundant fumaroles in the middle ground. View from the northeast. Parlcutin Volcano. Michoacan, Mexico. February 23, 1943. (Photo by R.R. Ramos) Published as plate 18-B in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00021 ID. Foshag, W.F. 21 Heavy bomb and lapilli emission. The horseshoe shape of the cone is apparent. Quitzocho lava flow in middle ground. Note the sparse cover of ash in the cultivated fields. Taken from the northeast. Paricutin Volcano. Michoacan, Mexico. March 2, 1943. (Photo by Institute de Geologia) Published as plate 19-A in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00022 ID. Foshag, W.F. 22 Air view of the cone from the northeast. Quitzocho flow in the foreground with fumaroles around its periphery; Cuiyusuru, right; Teruto, middle ground. Paricutin Volcano. Michoacan, Mexico. March 5, 1943. (Photo by E. Ordonez) Published as plate 19-B in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00023 ID. Foshag, W.F. 23 Breached eastern side of cone showing the crater and hummocky surface of Quitzocho lava flow. In the foreground are the remains of a forest destroyed by bomb and lapilli falls. Parlcutin Volcano. Michoacan, Mexico. March 10, 1943. (Photo by E. Ordonez) Published as plate 20-A in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00024 ID. Foshag, W.F. 24 The Quitzoclio lava flow has almost reached its maximum extent at the foot of Cerro de Jaratiro. The cone is still asymmetrical owing to repeated breaching. Taken from the eastern foot of Cerro de Jaratiro. Paricutin Volcano. Michoacan, Mexico. March 20, 1943. Published as plate 20-B in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00025 ID. Foshag, W.F. 25 Tremendous cineritic activity, with eruptive column 6 kilometers high. Front of the Mesa del Corral lava flow in the middle ground. Taken northward from Tititzu. Paricutin Volcano. Michoacan, Mexico. March 24, 1943. Published as plate 21-A in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00026 ID. Foshag, W.F. 26 Front of Quitzocho lava flow at the foot of Cerro de Jaratiro. The rugged flow is partially covered with ash. Fumaroles are situated about its periphery. Paricutin Volcano. Michoacan, Mexico. March 24, 1943. Published as plate 21-B in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00027 ID. Foshag, W.F. 27 The breached cone, now partly restored, and the inner cone or "ombligo." Very heavy cineritic activity. Taken from the south. Paricutin Volcano. Michoacan, Mexico. April 22, 1943. (Photo by L. C. Graton) Published as plate 22-A in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00028 ID. Foshag, W.F. 28 Heavy cineritic activity, accompanied by abundant bombs. Taken from Cerro de Jaratiro. Parlcutin Volcano. Michoacan, Mexico. May 24, 1943. Published as plate 22-B in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00029 ID. Foshag, W.F. 29 Eruptive column from the Uruapan highway. Plume of drifting ash to the south and clouds forming beneath it. Extinct volcanic cones in the middle distance. Taken from the east. Parlcutin Volcano. Michoacan, Mexico. June 9, 1943. Published as plate 23-A in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00030 ID. Foshag, W.F. 30 Lightning flashes were frequent in the dense swiftly rising eruptive column. Paricutin Volcano. Michoacan, Mexico. May 25, 1943. (Photo by R. Garcia) Published as plate 23-B in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00031 ID. Foshag, W.F. 31 Flow from vent high on the broken cone; vapors are being emitted from the north and south crater vents. Broken terraces are in the middle distance and the smooth domes of the Quitzocho ridge to the right; the ash-covered Quitzocho lava in the foreground. Taken from Cerro de Jaratiro. Paricutin Volcano. Michoacan, Mexico. June 19, 1943. Published as plate 24-A in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00032 ID. Foshag, W.F. 32 A later break in the cone. The rock peaks, "Los Paroles," once a part of the cone, are now part of Quitzocho ridge. Taken from Cerro de Jaratiro. Paricutin Volcano. Michoacan, Mexico. July 10, 1943. (Photo by E. Ordonez) Published as plate 24-B in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00033 ID. Foshag, W.F. 33 The broken cone, viewed northeastward from Cerro de Curupichu after the break of June 10, is now partly restored. Lava issues from a vent high on the flank of the cone (the Lagunita flow) and spreads out in the valley below. Paricutin Volcano. Michoacan, Mexico. June 28, 1943. (Photo by A. Brehme) Published as plate 25-A in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00034 ID. Foshag, W.F. 34 Late stage in the growth of Quitzocho ridge. The large blocks at the ridge terminus are of disintegrating lava. The dust, left center, is from boulders displaced by the elevation of the ridge. The foot of Cerro de Jaratiro is to the left. Paricutin Volcano. Michoacan, Mexico. August 25, 1943. (Photo by E. Ordonez) Published as plate 29-B in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00035 ID. Foshag, W.F. 35 Portion of Quitzocho ridge showing elevated stratified ash on top and disintegrated lava below. Parlcutin Volcano. Michoacan, Mexico. September 1943. (Photo by E. Ordonez) Published as plate 30-A in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00036 ID. Foshag, W.F. 36 Lazy emission of ash-laden eruptive column. On the right is part of the Quitzoclio ridge with "Los Faroles" at the right. Old crater of Cerro de Jaratiro in foreground. Paricutin Volcano. Michoacan, Mexico. September 17, 1943. Published as plate 30-B in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00037 ID. Foshag, W.F. 37 Zone of steaming ash in upper levels of the cone. Such sharply defined haloes of steam were fairly common. Taken from the summit of Cerro de Jaratiro. Paricutin Volcano. Michoacan, Mexico. October 19, 1943. (Photo by A. Brehme) Published as plate 31-A in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00038 ID. Foshag, W.F. 38 Outbreak of Sapichu viewed from the east. A series of vents extending from base of main cone to northeast broke out in the old Lagunita flow. Parlcutin Volcano. Miclioacan, Mexico. October 20, 1943. (Photo by L. Storm) Published as plate 31-B in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00039 ID. Foshag, W.F. 39 The new adventitious cone, Sapichu, at the base of Paricutin. A continuous fountain of viscous bombs without visible eruptive column. Taken from the east. Paricutin Volcano. Michoacan, Mexico. October 21, 1943. (Photo by L. Storm) Published as plate 32-A in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00040 ID. Foshag, W.F. 40 Eruptive chimney and steaming cracks on the north slope of Paricutin, and the new cone of Sapichu at the base of the cone. Taken from the northwest. Paricutin Volcano. Michoacan, Mexico. October 21, 1943. (Photo with infrared film by L. Storm) Published as plate 32-B in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00041 ID. Foshag, W.F. 41 During eruption of Sapichu, activity in the Paricutin crater was reduced to a lazy emission of vapor. A depressed boggy swale extended from the summit toward Sapichu, and the north slope was crusted with salts. Photo taken from Cerro de Jaratiro. Paricutin Volcano. Michoacan, Mexico. November 28, 1943. Published as plate 33-A in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00042 ID. Foshag, W.F. 42 The vaporous emission from Sapichu sometime condensed as a huge cloud above the volcano. Cumulus clouds in background. Photo taken from Angahuan. Paricutin Volcano. Michoacan, Mexico. December 6, 1943. Published as plate 33-B in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00043 ID. Foshag, W.F. 43 Burning gases from the orifices of a hornito. These flames are pale blue and only visible at dusk and night. The vents are lined with fused lava. Paricutin Volcano. Michoacan, Mexico. March 22, 1944. Published as plate 37-A in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00044 ID. Foshag, W.F. 44 A volcancito on the surface of the Taqui lava flow. Such edifices eject small bombs and emit burning gases and bluish fumes from their summit vents. They are situated above the area of the Taqui vents and are due to a flow of gas-charged lava through cracks in the lava crust. Paricutin Volcano. Michoacan, Mexico. May 24, 1944. (Photo by E. Ordonez) Published as plate 37-B in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00045 ID. Foshag, W.F. 45 Paricutin Volcano from Mesa de Cocjarao. The lowered south rim is due to scouring by the eruptive column of the south crater vent. Eruptive column is pale buff and largely vaporous. Photo taken from the southwest. Paricutin Volcano. Michoacan, Mexico. March 22, 1944. Published as plate 38-A in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00046 ID. Foshag, W.F. 46 Paricutin Volcano looking northeast from Las Cruces. Wind-blown ash in the foreground. Paricutin Volcano. Michoacan, Mexico. March 1944. (Photo by A. Brehme) Published as plate 38-B in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00047 ID. Foshag, W.F. 47 Paricutin Volcano from northeast at Cerro de Equijuata. Sapichu at the foot of main cone. Rugged lava of the flows of June in the middle distance. Paricutin Volcano. Michoacan, Mexico. March 1944. (Photo by A. Brehme) Published as plate 39-A in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00048 ID. Foshag, W.F. 48 Paricutin emitting sparse ash - vapors are also being emitted, but they cannot be seen. This type of activity is accompanied by an intermittent rolling rumble and fall of gritty ash. Photo taken from Cerro de Jaratiro. Paricutin Volcano. Michoacan, Mexico. May 27, 1944. Published as plate 39-B in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00049 ID. Foshag, W.F. 49 The interior of the Paricutin Volcano crater. A small vent in the bottom emitted a small column of brownish dust; a saucer-shaped depression in the lower south flank jets invisible vapors with a grating roar. Eruptive activity on this day very much reduced. Paricutin Volcano. Michoacan, Mexico. May 25, 1944. Published as plate 40-A in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00050 ID. Foshag, W.F. 50 San Juan Parangaricutiro in the foreground, the Parangaricutiro lava tongue beyond; Paricutin lava flow (middle) steaming from recent rain. Cerro de Canicjuata on right; Cerro de Jaratiro on left. Photo taken from Cerro de La Capilla, north. Paricutin Volcano. Michoacan, Mexico. June 17, 1944. Published as plate 40-B in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00051 ID. Foshag, W.F. 51 Parangaricutiro lava tongue advancing slowly through the town. Paricutin Volcano. Michoacan, Mexico. June 20, 1944. Published as plate 41-A in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00052 ID. Foshag, W.F. 52 Fog drifting in from the west is halted by the rising eruptive column of Paricutin. Photo taken from Cerro de Nureto, northeast. Paricutin Volcano. Miclioacan, Mexico. August 14, 1944. Published as plate 41-B in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00053 ID. Foshag, W.F. 53 Characteristic eruptive column during this period. Quitzocho ridge to the right. Campamento tongue of the Taqul flow behind the houses. Photo taken from Cerro de Jaratiro. Paricutin Volcano. Michoacan, Mexico. August 16, 1944. Published as plate 42-A in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00054 ID. Foshag, W.F. 54 Block lava front from a small flow from Quitzocho ridge. Parlcutin Volcano. Michoacan, Mexico. July 31, 1944. Published as plate 42-B in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00055 ID. Foshag, W.F. 55 The tower of the San Juan Parangaricutiro church above the lava of the Parangaricutiro tongue of the Taqui flows. Behind the tower lies the engulfed town. Parlcutin Volcano. Michoacan, Mexico. January 25, 1945. Published as plate 43-A in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00056 ID. Foshag, W.F. 56 The rubble front of the Sapichu lava flow at the San Juan Parangaricutiro-Uruapan road. A common type of lava at Paricutin. Parlcutin Volcano. Michoacan, Mexico. March 23, 1944. Published as plate 43-B in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00057 ID. Foshag, W.F. 57 Aerial view, end of the Parangaricutiro lava flow of Llano de Huirainbosta, showing the individual lava emissions from the top of the lava flow, a feature peculiar to this tongue. Paricutin Volcano. Michoacan, Mexico. December 2, 1944. (Photo by O. O. Fisher) Published as plate 44-A in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00058 ID. Foshag, W.F. 58 Structure of the Parangaricutiro tongue of the Taqui flows. This torn structure is peculiar to this tongue. Paricutin Volcano. Michoacan, Mexico. July 1, 1944. Published as plate 44-B in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00059 ID. Foshag, W.F. 59 Fumaroles in the Sapichu flow, with deposits of yellow and orange iron and aluminum chlorides. Paricutin Volcano. Michoacan, Mexico. August 17, 1944. Published as plate 45-A in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00060 ID. Foshag, W.F. 60 The Ahuan break and beginning of the Ahuan flows, viewed from the south. In the foreground lavas of the Taqui flows. Fresh lava photographs black. Paricutin Volcano. Michoacan, Mexico. Mid-November 1944. (Aerial photo by F. Zierer) Published as plate 45-B in U.-S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00061 ID. Foshag, W.F. 61 The cone and crater and the Ahuan flow viewed from the south. Sapichu at opposite base of the cone. Paricutin Volcano. Michoacan, Mexico. November 29, 1944. (Aerial photo by O. O. Fisher) Published as plate 46-A in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00062 ID. Foshag, W.F. 62 Details of the Ahuan flow showing kipukas of Taqui lava, clinker dikes of the flow along the base of the cone, and overflow of the lava to the right. Paricutin Volcano. Michoacan, Mexico. December 2, 1944. (Photo by O. O. Fisher) Published as plate 46-B in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00063 ID. Foshag, W.F. 63 Typical erosion gullies in the ash. A mat of pine needles from the dead trees frequently inhibits erosion. Paricutin Volcano. Michoacan, Mexico. January 25, 1945. (Photo by E. Ordonez) Published as plate 47-A in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00064 ID. Foshag, W.F. 64 Erosion arroyo in the ash at the foot of Cerro de Canicjuata, the result of a single storm. Erosion has taken place several feet below the old land surface. Paricutin Volcano. Michoacan Mexico, ca. 1943. Published as plate 47-B in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00065 ID. Foshag, W.F. 65 Weak vaporous crater emission with a little gritty ash. This type of explosion is accompanied by a rolling rumble. Photo taken from Cerro de Jaratiro. Paricutin Volcano. Michoacan, Mexico. December 4, 1944. Published as plate 48-A in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00066 ID. Foshag, W.F. 66 One of the intermittent crater explosions that were followed by a period of quiet. Photo taken from Cerro de Jaratiro. Paricutin Volcano. Michoacan, Mexico. December 6, 1944. Published as plate 48-B in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00067 ID. Foshag, W.F. 67 Interior of the crater, with one eruptive vent and a medium-sized eruptive column charged with ash. Paricutin Volcano. Michoacan, Mexico. January 23, 1945. Published as plate 49-A in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00068 ID. Foshag, W.F. 68 Interior of crater with two vents; the north vent emits a continuous column of white vapors; the south vent, beyond the low medial ridge, erupts at irregular intervals. Paricutin Volcano. Michoacan, Mexico. May 27, 1945. Published as plate 49-B in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00069 ID. Foshag, W.F. 69 One of the Taqui flows pouring over a ridge. The fluid center of the flow has left a deep trench, but a second lava surge begins to fill it. Taken from the north. Paricutin Volcano. Michoacan, Mexico. February 18, 1945. (Photo by E. Ordonez) Published as plate 50-A in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Paricutin Volcano-Bulletin 965-D/fwf00070 ID. Foshag, W.F. 70 Various Taqui flows viewed from the north. Mesa de Los Hornitos above. Paricutin Volcano. Michoacan, Mexico. July 1945. (Photo by E. Ordonez) Published as plate 50-B in U. S. Geological Survey. Bulletin 965-D. 1956. #1:/Fenneman Collection/fnm00001 ID. Fenneman, N.M. 1 Uplands south of Kaw, looking north down a draw to Arkansas River. Kay County, Oklahoma. ca 1920. #1:/Fenneman Collection/fnm00002 ID. Fenneman, N.M. 2 Dunes on north side of floodplain, Salt Fork, Arkansas River, opposite Pond Creek. Grant County, Oklahoma. ca 1920. #1:/Fenneman Collection/fnm00007 ID. Fenneman, N.M. 7 Three miles west of Avard, looking north against outlier of Gypsum Hills. Peneplain in foreground. Woods County, Oklahoma. ca 1920. #1:/Fenneman Collection/fnm00008 ID. Fenneman, N.M. 8 Dunes north of Cimarron River south of Waynoka. Woods County, Oklahoma. ca 1920. #1:/Fenneman Collection/fnm00009 ID. Fenneman, N.M. 9 Dunes on north bank of Cimarron River south of Waynoka. Woods County, Oklahoma. ca 1920. #1:/Fenneman Collection/fnm00010 ID. Fenneman, N.M. 10 Fixed dunes north of belt of drifting sand, north side of Cimmarron River, south of Waynoka. Woods County, Oklahoma. ca 1920. #1:/Fenneman Collection/fnm00017 ID. Fenneman, N.M. 17 Looking west from 6 miles west of southeast corner Woodward County. Relief 150 feet on Greer formation. Ellis County, Oklahoma. ca 1920. #1:/Fenneman Collection/fnm00018 ID. Fenneman, N.M. 18 Three miles west of southeast corner Woodward County. 100 feet relief on Greer Formation looking east. Ellis County, Oklahoma. ca 1920. #1:/Fenneman Collection/fnm00021 ID. Fenneman, N.M. 21 Local badlands north of Ferguson. A blue band (showing light in the picture) crosses the very red Enid Sandstone at a low angle. Blaine County, Oklahoma. ca 1920. #1:/Fenneman Collection/fnm00022 ID. Fenneman, N.M. 22 Badlands slope 40 feet high separating flat peneplain on Enid Formation from wide valley flat north of Fergusion. Blaine County, Oklahoma. ca 1920. #1:/Fenneman Collection/fnm00025 ID. Fenneman, N.M. 25 Looking west from 2 miles east of Cogar, 100 feet relief. Caddo County, Oklahoma. ca 1920. #1:/Fenneman Collection/fnm00026 ID. Fenneman, N.M. 26 Sink holes in gypsum escarpment 4 miles west of Shamrock. Wheeler County, Texas. ca 1920. #1:/Fenneman Collection/fnm00037 ID. Fenneman, N.M. 37 Triassic (?) white sandstone in thin-bedded red beds 2 miles north of Dickens. 125 feet exposure. Dickens County, Texas. ca 1920. #1:/Fenneman Collection/fnm00038 ID. Fenneman, N.M. 38 Red beds (sandstone and shale) with some white beds in canyon 2 miles north of Dickens. 50 feet exposure. Overlain on opposite side of the canyon by massive white Triassic (?) sandstone. Dickens County, Texas. ca 1920. #1:/Fenneman Collection/fnm00039 ID. Fenneman, N.M. 39 Two miles north of Dickens, looking east from head of 100 foot canyon in sandstone over peneplain probably 300 feet lower. Dickens County, Texas. ca 1920. #1:/Fenneman Collection/fnm00040 ID. Fenneman, N.M. 40 Widening gulley or draw 6 miles north of Chickasha. Actively widening but without a cenral trench. Apparently a rejuvenation of an older valley. Grady County, Oklahoma. ca 1920. #1:/Colorado-Bulletin748/cmr01198 ID. Campbell, M.R. 1198 Cliff of Twentymile sandstone near the center of Sec. 31, T. 5 N., R. 86 W., Routt County, Colorado. Circa 1919. Plate 8-B in U.S. Geological Survey. Bulletin 744. 1923. #1:/Colorado-Bulletin748/cmr01200 ID. Campbell, M.R. 1200 Dip slope of Twentymile sandstone in Secs. 27 and 28, T. 6 N., R. 87 W. Massive white sandstone, as seen from a point near the center of Sec. 33. The Grassy Creek fault causes an apparent duplication of the beds. Routt County, Colorado. Circa 1919. Plate 5-A in U.S. Geological Survey. Bulletin 744. 1923. #1:/Colorado-Bulletin748/cmr01201 ID. Campbell, M.R. 1201 East side of the Tow Creek anticline, from the SW ¬ Sec. 18, T. 5 N., R. 86 W. front row of knobs represents the Twentymile sandstone; behind may be seen great faces of the Trout Creek sandstone. Routt County, Colorado. Circa 1919. Plate 13-A in U.S. Geological Survey. Bulletin 744. 1923. #1:/Colorado-Bulletin748/cmr01202 ID. Campbell, M.R. 1202 Upturn Twentymile sandstone at mouth of Sage Creek canyon. The massive bed at the left is the Twentymile sandstone; the higher beds belong in the upper coal group. Routt County, Colorado. Circa 1919. Plate 8-A in U.S. Geological Survey. Bulletin 744. 1923. #1:/Colorado-Bulletin748/cmr01218 ID. Campbell, M.R. 1218 McGregor and Yampa River valley as seen from the hills north of Milner, the mine is just behind the lower end of the town; Tow Creek anticline on the right. Routt County, Colorado. Circa 1919. Plate 6-A in U.S. Geological Survey. Bulletin 744. 1923. #1:/Colorado-Bulletin748/cmr01227 ID. Campbell, M.R. 1227 Town of Oak Creek and the tipple of the Pinnacle coal mine. Routt County, Colorado. Circa 1919. Plate 13-B in U.S. Geological Survey. Bulletin 744. 1923. #1:/Colorado-Bulletin748/cmr01228 ID. Campbell, M.R. 1228 Town of Oak Creek and the tipple of the Pinnacle coal mine. Routt County, Colorado. Circa 1919. Plate 13-B in U.S. Geological Survey. Bulletin 744. 1923. #1:/Colorado-Bulletin748/cmr01317 ID. Campbell, M.R. 1317 Cliff of Twentymile sandstone in Foidel Canyon, shows fault in the distance and a small remnant of the sandstone on the left, in the middle of the valley. Routt County, Colorado. Circa 1919. Plate 7-B in U.S. Geological Survey. Bulletin 744. 1923. #1:/Colorado-Bulletin748/cmr01318 ID. Campbell, M.R. 1318 Cliff of Twentymile sandstone in Foidel Canyon, shows fault in the distance and a small remnant of the sandstone on the left, in the middle of the valley. Routt County, Colorado. Circa 1919. Plate 7-B in U.S. Geological Survey. Bulletin 744. 1923 #1:/Colorado-Bulletin748/cmr01321 ID. Campbell, M.R. 1321 Dip slope of Trout Creek sandstone in Sec. 9, T. 6 N., R. 86 W. Routt County, Colorado. Circa 1919. Plate 5-B in U.S. Geological Survey. Bulletin 744. 1923. #1:/Colorado-Bulletin748/cmr01323 ID. Campbell, M.R. 1323 Polygonal weathering of Trout Creek sandstone in Sec. 9, T. 6 N., R. 86 W., shows edge of bed. Routt County, Colorado. Circa 1919. Plate 4-A in U.S. Geological Survey. Bulletin 744. 1923. #1:/Massachusetts-Bulletin 744/dtn00340 ID. Dale, T.N. 340 East opening, Miller quarry, west Stockbridge, looking southwest. Shows at the left the apex of an anticline and on right the limb of the central syncline. Excavation is proceeding along the strike. The rock is calcite limestone with some interbedded dolomite. Berkshire County, Massachusetts. 1918. Plate 6-A in U.S. Geological Survey. Bulletin 744. 1923. #1:/Massachusetts-Bulletin 744/dtn00341 ID. Dale, T.N. 341 Eastern part of west opening Miller quarry, west Stockbridge, in the west limb of central syncline. The beds vary greatly in composition and have to be carefully sorted for burning. Berkshire County, Massachusetts. 1918. Plate 6-B in U.S. Geological Survey. Bulletin 744. 1923. #1:/Massachusetts-Bulletin 744/dtn00342 ID. Dale, T.N. 342 Western part of west opening Miller quarry, west of Stockbridge, looking south-southwest, shows contact of calcite beds with underlying plicated graphitic biotitic schist with quartz lenses and laminae, apparently unconformable to the limestone. Sledge of rock near schist 30 inches long. Berkshire County, Massachusetts. 1918. Plate 5-A in U.S. Geological Survey. Bulletin 744. 1923. #1:/Massachusetts-Bulletin 744/dtn00344 ID. Dale, T.N. 344 Eastward inclined compressed anticline with granular dolomite in the center of calcite marble on both sides, south wall of Truesdell quarry, (north), west Stockbridge. Berkshire County, Massachusetts. 1918. Plate 5-B in U.S. Geological Survey. Bulletin 744. 1923. #1:/Massachusetts-Bulletin 744/dtn00345 ID. Dale, T.N. 345 Central folds on south wall of Lee Lime Co.'s quarry at Lee, there is a well marked syncline on the east and beds on the west seem to be bending below to form another syncline. If this is correct the central hump consists of two minor anticlines and a small syncline between them. The three small graphitic beds appear among the massive beds to the right. Berkshire County, Massachusetts. 1918. Plate 7 in U.S. Geological Survey. Bulletin 744. 1923. #1:/Massachusetts-Bulletin 744/dtn00357 ID. Dale, T.N. 357 Pieces of lime vitreous black magnetic spherules resulting from the burning of pyritiferous dolomite in the kiln. Such dolomite is discarded, but when it chances to get into the kiln the product is thrown out. Massachusetts. 1918. Plate 8-B in U.S. Geological Survey. Bulletin 744. 1923. #1:/Massachusetts-Bulletin 744/dtn00358 ID. Dale, T.N. 358 Specimen of granular calcite limestone with nodules of granular dolomite in relief on weathered surface. Height 4 inches. Typical of limestone of Hancock valley, Berkshire County, Massachusetts. 1918. Plate 8-A in U.S. Geological Survey. Bulletin 744. 1923. #1:/Colorado-Bulletin748/ghs00052 ID. Gale, H.S. 52 Wadge coal bed in north wall of Dunkley Canyon, coal bed 11 feet 9 inches thick. Twentymile sandstone at extreme right. Routt Colorado. 1905. Plate 9-B in U.S. Geological Survey. Bulletin 748. 1923. #1:/Arkansas-Bulletin 734/mhd00259 ID. Miser, H.D. 259 Looking north at Penters Bluff station, showing characteristic outcrops of Plattin limestone on the hill slope. Manganese ore ready for shipment is shown on platform near railroad. Izard County, Arkansas. 1918. Plate 2-B in U.S. Geological Survey. Bulletin 734. 1923. #1:/Arkansas-Bulletin 734/mhd00268 ID. Miser, H.D. 268 Hill slope east side of Sullivan Creek, 5.5 miles north of Batesville, shows outcrops of the Joachim and Plattin limestone. Independence County, Arkansas. 1918. Plate 5-B in U.S. Geological Survey. Bulletin 734. 1923. #1:/Arkansas-Bulletin 734/mhd00272 ID. Miser, H.D. 272 Limestone in Boone chert at the quarry of the Pfeiffer Stone Co. at Pfeiffer. Independence County, Arkansas. 1918. Plate 9-A in U.S. Geological Survey. Bulletin 734. 1923. #1:/Arkansas-Bulletin 734/mhd00274 ID. Miser, H.D. 274 Blowing cave on east side of Polk Bayou 3.5 miles north of Batesville. The bluff at whose base is the entrance to the cave is composed of the Kimmswick limestone. The ledges above the bluff are composed of the Fernvale limestone. Independence County, Arkansas. 1918. Plate 6-A in U.S. Geological Survey. Bulletin 734. 1923. #1:/Arkansas-Bulletin 734/mhd00280 ID. Miser, H.D. 280 Shovel operating in open cut at Montgomery mine. The ladder is leaning against a "horse" or pinnacle of limestone. Independence County, Arkansas. 1918. Plate 14-B in U.S. Geological Survey. Bulletin 734. 1923. #1:/Arkansas-Bulletin 734/mhd00297 ID. Miser, H.D. 297 Bluff on White River just north of Walls ferry station; show Boone chert resting un conformably upon Penters chert. The basal bed (limestone) of the Boone thins out to the left, looking north. Independence County, Arkansas. 1918. Plate 6-B in U.S. Geological Survey. Bulletin 734. 1923. #1:/Arkansas-Bulletin 734/mhd00326 ID. Miser, H.D. 326 Pebbles of manganese ore from a gravel bed in a small stream1.75 miles east of Cushman; one half natural size. Independence County, Arkansas. 1918. Plate 7-B in U.S. Geological Survey. Bulletin 734. 1923. #1:/Arkansas-Bulletin 734/mhd00327 ID. Miser, H.D. 327 Button (Girvanellas) of manganese oxide from the Montgomery mine, edgewise; two-thirds natural size. Independence County, Arkansas. 1918. Plate 11-A in U.S. Geological Survey. Bulletin 734. 1923 #1:/Arkansas-Bulletin 734/mhd00328 ID. Miser, H.D. 328 Button (Girvanellas) of manganese oxide from the Montgomery mine, top view; two-thirds natural size. Independence County, Arkansas. 1918. Plate 11-B in U.S. Geological Survey. Bulletin 734. 1923. #1:/Arkansas-Bulletin 734/mhd00329 ID. Miser, H.D. 329 Fossils from the Cason Mine: Girvanellas in fragments of limestone from the lowermost beds of St. Claire limestone. Natural size. Independence County, Arkansas. 1918. Plate 8-B in U.S. Geological Survey. Bulletin 734. 1923. #1:/Arkansas-Bulletin 734/mhd00330 ID. Miser, H.D. 330 Fossils from the Cason Mine: Girvanellas in fragments of limestone from the lowermost beds of St. Claire limestone. Natural size. Independence County, Arkansas. 1918. Plate 8-C in U.S. Geological Survey. Bulletin 734. 1923 #1:/Arkansas-Bulletin 734/mhd00331 ID. Miser, H.D. 331 Fossils from the Cason Mine: Girvanellas (replaced by iron and manganese oxides) on weathered surface of St. Claire limestone. Natural size. Independence County, Arkansas. 1918. Plate 8-A in U.S. Geological Survey. Bulletin 734. 1923. #1:/Arkansas-Bulletin 734/mhd00332 ID. Miser, H.D. 332 Polished specimens of manganese ore from the Batesville district. Porous manganese ore with buttons of girvanellas from the Montgomery mine. Natural size. Independence County, Arkansas. 1918. Plate 10-B in U.S. Geological Survey. Bulletin 734. 1923. #1:/Arkansas-Bulletin 734/mhd00333 ID. Miser, H.D. 333 Polished specimens of manganese ore from the Batesville district. Manganese-bearing carbonate from Fernvale limestone at the Harvey mine, showing its partial replacement by manganese oxide. Natural size. Independence County, Arkansas. 1918. Plate 10-D in U.S. Geological Survey. Bulletin 734. 1923. #1:/Arkansas-Bulletin 734/mhd00334 ID. Miser, H.D. 334 Polished specimens of manganese ore from the Batesville district. Slab of manganese ore from the Wildcat prospect showing an intimate mixture of hausmanite and psilomelane in a roughly zonal arrangement and a radiating mass of white barite at the center. The light steel-gray mineral and the black mineral immediately adjacent to the barite are psilomelane: the rest of the black mineral is hausmanite. Natural size. Independence County, Arkansas. 1918. Plate 10-C in U.S. Geological Survey. Bulletin 734. 1923. #1:/Arkansas-Bulletin 734/mhd00335 ID. Miser, H.D. 335 Polished specimens of manganese ore from the Batesville district. Fragment of red shale from the Cason shale at Cason mine, showing buttons of girvanellas that have been replaced by manganese oxide (light gray). Natural size. Independence County, Arkansas. 1918. Plate 10-A in U.S. Geological Survey. Bulletin 734. 1923. #1:/Montana-Bulletin 749/rgs00030 ID. Rogers, G.S. 30 Hogback formed by sandstone of the Judith River formation, looking northwest from Sec. 22, T. 1 N., R. 34 E. Big Horn County, Montana. 1912. Plate 1-A in U.S. Geological Survey. Bulletin 749. 1923. #1:/Montana-Bulletin 749/rgs00038 ID. Rogers, G.S. 38 Middle portion of Lance formation 3 miles above mouth of unknown creek, Sec. 15, T. 5 N., R. 35 E. showing entire absence of sandstone; compare to Rogers 35. Treasure County, Montana. 1912. Plate 2-B in U.S. Geological Survey. Bulletin 749. 1923. #1:/Montana-Bulletin 749/rgs00041 ID. Rogers, G.S. 41 Coal bed A, the base of the Tullock member of the Lance formation, exposed near head of unknown creek in Sec. 34, T. 5 N., R. 35 E. The manner in which the heavy sandstone bed overlying the coal to the right is partly replaced by thin-bedded sandstone and shale within a short distance well illustrates the irregularities in stratification characteristic of the Lance formation. Treasure County, Montana. 1912. Plate 9-A in U.S. Geological Survey. Bulletin 749. 1923. #1:/Montana-Bulletin 749/rgs00045 ID. Rogers, G.S. 45 Butte of upper division of the Fort Union formation rising abruptly from the flat Lebo shale plain on Plum Creek, in Sec. 5, T. 1 N., R. 36 E. The striking symmetrical shape of this butte is due to its hard cap of baked rock formed by the coal bed P. Big Horn County, Montana. 1912. Plate 5-B in U.S. Geological Survey. Bulletin 749. 1923. #1:/Montana-Bulletin 749/rgs00046 ID. Rogers, G.S. 46 Typical butte of the basal part of the upper division of the Fort Union formation on Plum Creek in Sec. 9, T. 1 N., R. 36 E., looking north, these beds are marked by the heavy sandstone shown in the view. The grass covered foreground is underlain by the soft Lebo shale member of the Fort Union. Note the abrupt western slope and gentle, grass covered eastern slope. Big Horn County, Montana. 1912. Plate 5-A in U.S. Geological Survey. Bulletin 749. 1923. #1:/Montana-Bulletin 749/rgs00053 ID. Rogers, G.S. 53 Quaternary gravel resting on eroded surface of the lower part of the Tullock member of the Lance formation on Box Elder Creek, Sec. 13, T. 5 N., R. 35 E., this gravel covers the main divides and higher hills in the northern part of the Tullock Creek field. Where it reaches a maximum thickness of 90 feet, though unconsolidated in some localities, in others it is a conglomerate, as shown in this view. Treasure County, Montana. 1912. Plate 7-A in U.S. Geological Survey. Bulletin 749. 1923. #1:/Montana-Bulletin 749/rgs00055 ID. Rogers, G.S. 55 Contorted laminae in flat-lying sandstone layer in the Lance formation in Sec. 4, T. 4 N., R. 35 E. sandstone is 75 feet below the base of the Tullock member. The apparent crumpling is probably due to concretionary action. Treasure County, Montana. 1912. Plate 6-A in U.S. Geological Survey. Bulletin 749. 1923. #1:/Montana-Bulletin 749/rgs00063 ID. Rogers, G.S. 63 Overthrust fault cutting coal bed C, Sec. 3, T. 2 N., R. 35 E., the strata in this vicinity are nearly flat. Big Horn County, Montana. 1912. Plate 8-A in U.S. Geological Survey. Bulletin 749. 1923. #1:/Montana-Bulletin 749/rgs0065a ID. Rogers, G.S. 65a Coal bed A, the base of the Tullock member of the Lance formation, exposed on West Corral Creek in Sec. 2, T. 4 N., R. 36 E. The characteristic thin sandy parting is shown near the top of the bed. Treasure County, Montana. 1912. Plate 9-B in U.S. Geological Survey. Bulletin 749. 1923. #1:/Montana-Bulletin 749/rgs00066 ID. Rogers, G.S. 66 Typical escarpment formed by the Tullock member of the Lance formation on West Corral Creek, Sec. 33, T. 5 N., R. 36 E. Treasure County, Montana. 1912. Plate 3-A in U.S. Geological Survey. Bulletin 749. 1923. #1:/Montana-Bulletin 749/rgs00076 ID. Rogers, G.S. 76 Butte formed by the upper division of the Fort Union formation at the head of Passage Creek, Sec. 32, T. 3 N., R. 38 E., in this locality these strata contain only thin coal beds, which are not burned on the outcrop. Note their great similarity to the beds of the Tullock member of the Lance formation, as shown in Rogers 66 and with Rogers 46, showing the upper division of the Fort Union in the southern part of the field. Treasure County, Montana. 1912. Plate 3-B in U.S. Geological Survey. Bulletin 749. 1923. #1:/Montana-Bulletin 749/rgs00080 ID. Rogers, G.S. 80 Detail of cross-bedding in the soft basal sandstone of the upper division of the Fort Union formation in Sec. 9, T. 3 N., R. 36 E. Big Horn County, Montana. 1912. Plate 6-B in U.S. Geological Survey. Bulletin 749. 1923. #1:/Montana-Bulletin 749/rgs00081 ID. Rogers, G.S. 81 Sculpturing of soft white sandstone capped by hard brown concretionary layer, overlying coal bed D in the Tullock member of the Lance formation, west Bear Creek, Sec. 12, T. 4 N., R. 36 E. Big Horn County, Montana. 1912. Plate 1-B in U.S. Geological Survey. Bulletin 749. 1923. #1:/Montana-Bulletin 749/rgs00086 ID. Rogers, G.S. 86 Trace of fault in nearly flat lying beds of the Lebo shale member of the Fort Union formation, Sec. 22, T. 2 N., R. 36 E. showing also the type of country underlain by the Lebo member. The small hogback marking the fault is formed of shale hardened and compacted by the friction and pressure along the fault plane. Big Horn County, Montana. 1912. Plate 7-B in U.S. Geological Survey. Bulletin 749. 1923. #1:/South Dakota-Bulletin 740/sdb00082 ID. Sterrett, D.B. 82 Northward toward New York mica mine, near Custer. Custer County, South Dakota. Before 1923. Plate 25-B in U.S. Geological Survey. Bulletin 740. 1923. #1:/South Dakota-Bulletin 740/sdb00083 ID. Sterrett, D.B. 83 Northward along pegmatitic outcrop at New York mica mine, near Custer. Custer County, South Dakota. Before 1923. Plate 26-A in U.S. Geological Survey. Bulletin 740. 1923. #1:/South Dakota-Bulletin 740/sdb00087 ID. Sterrett, D.B. 87 Crystals of mica in pegmatite and blasted loose on 200-foot level of New York mica mine, near Custer. Custer County, South Dakota. Before 1923. Plate 26-B in U.S. Geological Survey. Bulletin 740. 1923. #1:/South Dakota-Bulletin 740/sdb00089 ID. Sterrett, D.B. 89 Northward toward engine and shaft house of White Spar Mica mine, near Custer. Custer County, South Dakota. Before 1923. Plate 27-A in U.S. Geological Survey. Bulletin 740. 1923. #1:/South Dakota-Bulletin 740/sdb00092 ID. Sterrett, D.B. 92 End of intrusion of small dike of pegmatite at Crown Mica mine, near Custer. Custer County, South Dakota. Before 1923. Plate 27-B in U.S. Geological Survey. Bulletin 740. 1923. #1:/South Dakota-Bulletin 740/sdb00093 ID. Sterrett, D.B. 93 Contact of pegmatite and gneiss in northeast face of open cut at Firestone Mica mine, near Custer. Custer County, South Dakota. Before 1923. Plate 28-A in U.S. Geological Survey. Bulletin 740. 1923. #1:/South Dakota-Bulletin 740/sdb00095 ID. Sterrett, D.B. 95 Large crystals of black tourmaline exposed in small cut along wall of pegmatite at Philip Geering's Mica prospect, near Custer. Custer County, South Dakota. Before 1923. Plate 28-B in U.S. Geological Survey. Bulletin 740. 1923. #1:/South Dakota-Bulletin 740/sdb00102 ID. Sterrett, D.B. 102 Southward from Harney Peak, Black Hills, showing outcrops of pegmatitic granite. Pennington County, South Dakota. Before 1923. Plate 25-A in U.S. Geological Survey. Bulletin 740. 1923. #1:/Nevada/sdb00327 ID. Sterrett, D.B. 327 Mrs. Clara Dunwoody on the "Clara" variscite claim; 10 miles SW of Sodaville. Mrs. Dunwoody is a prospector and socialist leader. Mineral County, Nevada. May 1910. #1:/Colorado-Bulletin 740/sdb00438 ID. Sterrett, D.B. 438 Mass of solid mica exposed in open cut at Grady Mica mine, Mesa County, Colorado. Before 1923. Plate 9-A in U.S. Geological Survey. Bulletin 740. 1923. #1:/New Hampshire-Bulletin 740/sdb00531 ID. Sterrett, D.B. 531 Southwestward across the open cut of the Belden or Standard Mica mine, Grafton County, New Hampshire. Before 1923. Plate 18-B in U.S. Geological Survey. Bulletin 740. 1923. #1:/New Hampshire-Bulletin 740/sdb00534 ID. Sterrett, D.B. 534 Contact between pegmatite and overlying gneiss at Sanborn Mica mine, Grafton County, New Hampshire. Before 1923. Plate 18-A in U.S. Geological Survey. Bulletin 740. 1923. #1:/New Hampshire-Bulletin 740/sdb00535 ID. Sterrett, D.B. 535 Southwestward over the open cut of the Granite State Mica Co.'s mine. Cheshire County, New Hampshire. Before 1923. Plate 13-B in U.S. Geological Survey. Bulletin 740. 1923. #1:/New Hampshire-Bulletin 740/sdb00536 ID. Sterrett, D.B. 536 Southwestward across open cut of the French Mica mine, Cheshire County, New Hampshire. Before 1923. Plate 15-A in U.S. Geological Survey. Bulletin 740. 1923. #1:/New Hampshire-Bulletin 740/sdb00538 ID. Sterrett, D.B. 538 View from middle of north side of open cut of Keene Mica Products Co.'s mica mine, horse of mica gneiss inclosed in pegmatite near center. Cheshire County, New Hampshire. Before 1923. Plate 16-A in U.S. Geological Survey. Bulletin 740. 1923. #1:/New Hampshire-Bulletin 740/sdb00539 ID. Sterrett, D.B. 539 Enrichment of mica in pegmatite along west side of the horse of mica shown in north side of open cut of Keene Mica Products Co.'s mica mine, Cheshire County, New Hampshire. Before 1923. Plate 16-B in U.S. Geological Survey. Bulletin 740. 1923. #1:/Texas-Bulletin 740/sdb00541 ID. Sterrett, D.B. 541 Northward toward open cut in pegmatite inclosed in mica gneiss Texas Mica Co., hills capped with sedimentary rock in background. Culberson County, Texas. Before 1923. Plate 9-B in U.S. Geological Survey. Bulletin 740. 1923. #1:/Virginia-Professional paper 248/sdb00604 ID. Sterrett, D.B. 604 Large flat sheets of mica at the Ridgeway mine, Young brothers in foreground; Mr. Lippert, manager, on right; Captain McCray on left; Mr. Kelly in background. Henry County, Virginia. October 1913. Figure 44, in U.S.Geological Survey Professional Paper 248. 1953. #1:/South Carolina-Bulletin 740/sdb00609 ID. Sterrett, D.B. 609 Northward toward workings of Willimon Mica mine, Greenville County, South Carolina. Before 1923. Plate 24-B in U.S. Geological Survey. Bulletin 740. 1923. #1:/New Hampshire-Bulletin 740/sdb00621 ID. Sterrett, D.B. 621 Northwestward across the main open cut of the Rhoda Mica mine, Cheshire County, New Hampshire. Before 1923. Plate 14-A in U.S. Geological Survey. Bulletin 740. 1923. #1:/New Hampshire-Bulletin 740/sdb00623 ID. Sterrett, D.B. 623 Mica crystals in a face of pegmatite in the deep stope under main open cut of the Rhoda Mica mine, Cheshire County, New Hampshire. Before 1923. Plate 14-B in U.S. Geological Survey. Bulletin 740. 1923. #1:/New Hampshire-Bulletin 740/sdb00630 ID. Sterrett, D.B. 630 Northeastward across the quarry of Franklin Playter Mica-Beryl mine, showing the pinching of pegmatite between mica gneiss walls. Sullivan County, New Hampshire. Before 1923. Plate 13- A in U.S. Geological Survey. Bulletin 740. 1923. #1:/New Hampshire-Bulletin 740/sdb00633 ID. Sterrett, D.B. 633 North of east in the open cut of the Kilton Mica mine. Grafton County, New Hampshire. Before 1923. Plate 15-B in U.S. Geological Survey. Bulletin 740. 1923. #1:/New Hampshire-Bulletin 740/sdb00643 ID. Sterrett, D.B. 643 Northeastward down into the stopes of the Palermo Mica mine near North Groton. Grafton County, New Hampshire. Before 1923. Plate 17-B in U.S. Geological Survey. Bulletin 740. 1923. #1:/New Hampshire-Bulletin 740/sdb00648 ID. Sterrett, D.B. 648 Fork in the pegmatite at General Electric Co.'s mica mine near west Rumney. Grafton County, New Hampshire. Before 1923. Plate 17-A in U.S. Geological Survey. Bulletin 740. 1923. #1:/Connecticutt-Bulletin 740/sdb00655 ID. Sterrett, D.B. 655 Block of solid mica blasted loose from pegmatite at George Roebling mica mine. Litchfield County, Connecticutt. Before 1923. Plate 10 in U.S. Geological Survey. Bulletin 740. 1923. #1:/North Carolina-Bulletin 740/sdb00660 ID. Sterrett, D.B. 660 Eastward across deep open stope of the Wiseman mica mine, Carolina Mineral Co., on Beaver Creek, Mitchell County, North Carolina. Before 1923. Plate 24-A in U.S. Geological Survey. Bulletin 740. 1923. #1:/North Carolina-Bulletin 740/sdb00662 ID. Sterrett, D.B. 662 Eastward toward workings of Carolina Mineral Co.'s mica-feldspar mine, Penland. Mitchell County, North Carolina. Before 1923. Plate 22 in U.S. Geological Survey. Bulletin 740. 1923. #1:/North Carolina-Bulletin 740/sdb00663 ID. Sterrett, D.B. 663 Westward toward workings of Carolina Mineral Co.'s mica feldspar mine near Penland; forms a panorama with Sterrett 664. Mitchell County, North Carolina. Before 1923. Plate 23-A in U.S. Geological Survey. Bulletin 740. 1923. #1:/North Carolina-Bulletin 740/sdb00664 ID. Sterrett, D.B. 664 Northwestward toward Harris workings of Harris Clay Co.'s kaolin mine, near Penland; panorama with Sterrett 663. Mitchell County, North Carolina. Before 1923. Plate 23-B in U.S. Geological Survey. Bulletin 740. 1923. #1:/United States-Bulletin 740/sdb00673 ID. Sterrett, D.B. 673 Sheet of mica containing inclusions resembling ancient hieroglyphics. United States. Before 1923. Plate 8-A in U.S. Geological Survey. Bulletin 740. 1923. #1:/United States-Bulletin 740/sdb00674 ID. Sterrett, D.B. 674 Mica slightly "specked" with magnetite. United States. Before 1923. Plate 7-B in U.S. Geological Survey. Bulletin 740. 1923. #1:/United States-Bulletin 740/sdb00675 ID. Sterrett, D.B. 675 Mica heavily "specked" with magnetite. United States. Before 1923. Plate 7-A in U.S. Geological Survey. Bulletin 740. 1923. #1:/United States-Bulletin 740/sdb00676 ID. Sterrett, D.B. 676 Fragment of crystal of mica showing "A" structure. United States. Before 1923. Plate 4-A in U.S. Geological Survey. Bulletin 740. 1923. #1:/United States-Bulletin 740/sdb00677 ID. Sterrett, D.B. 677 Specimens of "ruled mica" some "ruled" into "ribbons". United States. Before 1923. Plate 3-B in U.S. Geological Survey. Bulletin 740. 1923. #1:/Virginia-Professional paper 248/sdb00678 ID. Sterrett, D.B. 678 Typical herringbone structure in rough mica crystals. Virginia. Figure 31, in U.S.Geological Survey Professional Paper 248. 1953. #1:/United States-Bulletin 740/sdb00679 ID. Sterrett, D.B. 679 Sheet of mica inclosing two flattened garnet crystals. United States. Before 1923. Plate 8-B in U.S. Geological Survey. Bulletin 740. 1923. #1:/North Carolina-Bulletin 740-Professional paper 248/sdb00680 ID. Sterrett, D.B. 680 Sheet of biotite, inclosing a rhombic crystal of muscovite both having the same cleavage planes. Mitchell County, North Carolina. Before 1923. Plate 8-C in U.S. Geological Survey. Bulletin 740. 1923. Figure 42, in U.S.Geological Survey Professional Paper 248. 1953. #1:/United States-Bulletin 740/sdb00681 ID. Sterrett, D.B. 681 Cleavage sheet from mica crystal, showing percussion figures. United States. Before 1923. Plate 3-A in U.S. Geological Survey. Bulletin 740. 1923. #1:/United States-Bulletin 740/sdb00682 ID. Sterrett, D.B. 682 Mica capping: mica on the left, quartz on the right. United States. Before 1923. Plate 2-A in U.S. Geological Survey. Bulletin 740. 1923. #1:/North Carolina-Bulletin 740/sdb00683 ID. Sterrett, D.B. 683 Children working in a mica-trimming shop of Walnut Knob mica mine, Ashe County, North Carolina. Before 1923. Plate 20-B in U.S. Geological Survey. Bulletin 740. 1923. #1:/George Ottis Smith Collection/sgo00001 ID. Smith, G.O. 1 Beavertail Bend. West bank of Yakima Canyon. Ellensburg Quadrangle, Kittitas County, Washington. Part of Plate II sketch in U.S. Geological Survey Professional Paper 19. 1903. May 30, 1900. #1:/George Ottis Smith Collection/sgo00002 ID. Smith, G.O. 2 Ellensburg formation. Ellensburg, east of Normal School. Mt. Stuart Quadrangle, Kittitas County, Washington. May 31, 1900. #1:/George Ottis Smith Collection/sgo00003 ID. Smith, G.O. 3 Columnar basalt. Umptanum Valley Falls. Ellensburg Quadrangle, Yakima County, Washington. June 6, 1900. #1:/George Ottis Smith Collection/sgo00004 ID. Smith, G.O. 4 Level top of spur, showing old lowland surface cut across contact between soft Ellenburger sandstone and Yakima basalt. East of Kelly Hollow. Contact shown by line with E/B mark. Ellensburg Quadrangle, Yakima County, Washington. June 20, 1900. #1:/George Ottis Smith Collection/sgo00005 ID. Smith, G.O. 5 Surface of level topped spur, shown in sgo00004. Basalt boulders conceal contact located approximately where horse stands. East of Kelly Hollow. Ellensburg Quadrangle, Yakima County, Washington. June 20, 1900. #1:/George Ottis Smith Collection/sgo00006 ID. Smith, G.O. 6 Selah Ridge, west of gap, showing dip of basalt with which the level top is not conformable. The latter represents an old lowland surface. Yakima County, Washington. circa 1900. #1:/George Ottis Smith Collection/sgo00007 ID. Smith, G.O. 7 Outcrop of Ellensburg sandstone, interbedded with Yakima and Wenas basalts. Selah Gap, Yakima County, Washington. June 27, 1900. #1:/George Ottis Smith Collection/sgo00008 ID. Smith, G.O. 8 Granite boulders, floated to present position on ice, at time of existence of Lake Lewis in Central Washington. Wide Hollow west of North Yakima. Yakima County, Washington. July 2, 1900. #1:/George Ottis Smith Collection/sgo00009 ID. Smith, G.O. 9 North wall of andesite-filled canyon shows over top of tree. South wall next to large tree. Tieton Canyon re-excavated in andesite. Yakima County, Washington. July 12, 1900. #1:/George Ottis Smith Collection/sgo00010 ID. Smith, G.O. 10 Tieton Canyon side gulch, andesite filled. Yakima County, Washington. July 12, 1900. #1:/George Ottis Smith Collection/sgo00011 ID. Smith, G.O. 11 Terrace of Miocene Ellensburg formation. Mount Stuart range in background. Shows remnant of old lowland surface. Northwest of Ellensburg, Kittitas County, Washington. June 1, 1900. #1:/George Ottis Smith Collection/sgo00012 ID. Smith, G.O. 12 Bluff of Ellensburg formation. Dudley Bridge, Kittitas County, Washington. June 1, 1900. #1:/George Ottis Smith Collection/sgo00013 ID. Smith, G.O. 13 Detail in Ellensburg formation. Naear Dudley Bridge, Kittitas County, Washington. June 1, 1900. #1:/George Ottis Smith Collection/sgo00014 ID. Smith, G.O. 14 Selah and Union Gaps. Yakima River cutting across uplifted ridges, the crests and slopes of which show old lowland surface. South Slope of Umplanum Ridge. Yakima County, Washington. June 20, 1900. #1:/George Ottis Smith Collection/sgo00015 ID. Smith, G.O. 15 Umptanum Gap. Yakima River cutting across anticlinal ridge of basalt. Uptanum Ridge. Yakima County, Washington. June 20, 1900. #1:/George Ottis Smith Collection/sgo00016 ID. Smith, G.O. 16 Columnar andesite (Pleistocene). Pictured Rocks, Natches Valley. Camera inclined upward 11ø. Yakima County, Washington. June 25, 1900. #1:/George Ottis Smith Collection/sgo00017 ID. Smith, G.O. 17 Columnar andesite (Pleistocene). Pictured Rocks, Natches Valley. Yakima County, Washington. June 25, 1900. #1:/George Ottis Smith Collection/sgo00018 ID. Smith, G.O. 18 Columnar andesite (Pleistocene). Pictured Rocks, Natches Valley. Yakima County, Washington. June 25, 1900. #1:/George Ottis Smith Collection/sgo00019 ID. Smith, G.O. 19 Gap of Yakima River on ridge on north side of valley. Showing anticlinal structure of ridge. Wenas-Selah Valley. Yakima County, Washington. June 27, 1900. #1:/George Ottis Smith Collection/sgo00020 ID. Smith, G.O. 20 Remnant of lowland surface, Ellensburg formation. Wenas-Selah Valley. Yakima County, Washington. June 27, 1900. #1:/George Ottis Smith Collection/sgo00021 ID. Smith, G.O. 21 Basalt columns. Plate jointing in large columns. Ahtanum Creek near Tampico. Yakima County, Washington. July 9, 1900. #1:/George Ottis Smith Collection/sgo00022 ID. Smith, G.O. 22 Basalt columns. Plate jointing in large columns. Atanum Creek near Tampico. Yakima County, Washington. July 9, 1900. #1:/George Ottis Smith Collection/sgo00023 ID. Smith, G.O. 23 South dip of basalts in Cleman Mountain anticline. Landslide topography in foreground. South side of Cleman Mountain. Yakima County, Washington. July 21, 1900. #1:/George Ottis Smith Collection/sgo00024 ID. Smith, G.O. 24 Canyon of Naches River cut across basalt. Same locality as sgo00023. Yakima County, Washington. July 21, 1900. #1:/George Ottis Smith Collection/sgo00025 ID. Smith, G.O. 25 East of synclinal valley. Ranches irrigated from artesian wells. Moxee Valley. Yakima County, Washington. August 9, 1900. #1:/George Ottis Smith Collection/sgo00026 ID. Smith, G.O. 26 Columbia River Canyon. Wenatchee, Chelan County, Washington. June 26, 1900. #1:/George Ottis Smith Collection/sgo00027 ID. Smith, G.O. 27 Gravel terrace overlooking the Columbia River at Knapp Coulee. Chelan County, Washington. June 28, 1900. #1:/George Ottis Smith Collection/sgo00028 ID. Smith, G.O. 28 Chelan Falls, at Chelan Falls, Chelan County, Washington. June 29, 1900. #1:/George Ottis Smith Collection/sgo00029 ID. Smith, G.O. 29 East of Blue Lake between Columbia and Methou Rivers. Columbia Valley. Panorama with sgo00030, Okanogan County, Washington. July 1, 1901. #1:/George Ottis Smith Collection/sgo00030 ID. Smith, G.O. 30 Atwine's Coulee, an old channel parallel with Columbia Valley. Panorama with sgo00029, Okanogan County, Washington. July 1, 1901. #1:/George Ottis Smith Collection/sgo00031 ID. Smith, G.O. 31 Methou Valley at head of old valley. Same location as sgo00030 but further north on ridge. Okanogan County, Washington. July 1, 1901. #1:/George Ottis Smith Collection/sgo00032 ID. Smith, G.O. 32 Terrace overlooking Conconully. Deserted channels of Salmon Creek. Okanogan County, Washington. July 5, 1901. #1:/George Ottis Smith Collection/sgo00033 ID. Smith, G.O. 33 Northwest Boundary Monument No. 90. Ashnola Mtn Quad, Okanogan County, Washington. July 10, 1901. #1:/George Ottis Smith Collection/sgo00034 ID. Smith, G.O. 34 Northwest Boundary Monument No. 91. Ashnola Pass Quad, Okanogan County, Washington. July 10, 1901. #1:/George Ottis Smith Collection/sgo00035 ID. Smith, G.O. 35 Northwest Boundary Monument No. 92. west side of Ashnola River, Ashnola Pass Quad, Okanogan County, Washington. July 11, 1901. #1:/George Ottis Smith Collection/sgo00036 ID. Smith, G.O. 36 Northwest Boundary Monument No. 93. Ashnola Pass Quad, Okanogan County, Washington. July 13, 1901. #1:/George Ottis Smith Collection/sgo00037 ID. Smith, G.O. 37 Northwest Boundary Monument No. 94. Remmel Mtn Quad, Okanogan County, Washington. July 13, 1901. #1:/George Ottis Smith Collection/sgo00038 ID. Smith, G.O. 38 Northwest Boundary Monument No. 95. Remmel Mtn Quad, Okanogan County, Washington. July 13, 1901. #1:/George Ottis Smith Collection/sgo00039 ID. Smith, G.O. 39 Northwest Boundary Monument No. 96. West side of Ewart Creek, Remmel Mtn Quad, Okanogan County, Washington. July 13, 1901. #1:/George Ottis Smith Collection/sgo00040 ID. Smith, G.O. 40 Northwest Boundary Monument No. 97. Beverman Ridge Quad, Okanogan County, Washington. July 13, 1901. #1:/George Ottis Smith Collection/sgo00041 ID. Smith, G.O. 41 Northwest Boundary Monument No. 98. Beverman Ridge Quad, Okanogan County, Washington. July 15, 1901. #1:/George Ottis Smith Collection/sgo00042 ID. Smith, G.O. 42 West slope down to Similkameen River. Mount Chopaca; Northwest Boundary. Okanogan County, Washington. July 19, 1901. #1:/George Ottis Smith Collection/sgo00043 ID. Smith, G.O. 43 Northwest Boundary Monument No. 99. Beverman Ridge Quad, Okanogan County, Washington. July 28, 1901. #1:/George Ottis Smith Collection/sgo00044 ID. Smith, G.O. 44 Northwest Boundary Monument No. 100. Beverman Ridge Quad, Okanogan County, Washington. July 26, 1901. #1:/George Ottis Smith Collection/sgo00045 ID. Smith, G.O. 45 Vista from Northwest Boundary Monument No. 100 to No. 101. Beverman Ridge Quad, Okanogan County, Washington. July 26, 1901. #1:/George Ottis Smith Collection/sgo00046 ID. Smith, G.O. 46 Northwest Boundary Monument No. 101. Beverman Ridge Quad, Okanogan County, Washington. July 26, 1901. #1:/George Ottis Smith Collection/sgo00047 ID. Smith, G.O. 47 Naisulch Station, cabin and astronomical station. Naisnulch Station - 1859. Northwest Boundary. Okanogan County, Washington. July 26, 1901. #1:/Washington-Bulletin 235/sgo00048 ID. Smith, G.O. 48 Cathederal Peak, Okanogan Mountains, Okanogan County, Washington. August 1, 1901. Plate 3-B in US Geological Survey Bulletin 235. 1904. #1:/Washington-Bulletin 235/sgo00049 ID. Smith, G.O. 49 Methou (? W) Peak, Mount Remmel from northwest. Northwest Boundary, Remmel Mtn Quad, Okanogan County, Washington. August 4, 1901. #1:/Washington-Bulletin 235/sgo00050 ID. Smith, G.O. 50 Amphitheather Peak, Okanogan Mountains, sculpture by glacial cirques, Okanogan County, Washington. August 4, 1901. Plate 3-A in US Geological Survey Bulletin 235. 1904. #1:/George Ottis Smith Collection/sgo00051 ID. Smith, G.O. 51 Park Pass, Okanogan Mountains. Cathederal Peak from the southwest. Okanogan County, Washington. August 1901. #1:/George Ottis Smith Collection/sgo00052 ID. Smith, G.O. 52 Divide south of Park Pass. Same locality as sgo00051. Five valleys have been cut back to make low saddle with radiating spurs. Okanogan Mountains. Okanogan County, Washington. August 1901. #1:/George Ottis Smith Collection/sgo00053 ID. Smith, G.O. 53 Northwest Boundary Monument No. 102. Horseshoe Quad, Okanogan County, Washington. August 13, 1901. #1:/George Ottis Smith Collection/sgo00054 ID. Smith, G.O. 54 Northwest Boundary Monument No. 103. Horseshoe Quad, Okanogan County, Washington. August 13, 1901. #1:/George Ottis Smith Collection/sgo00055 ID. Smith, G.O. 55 Swamp Creek Glacier. South of Twin Lakes Pass. Northwest Boundary. Whatcom County, Washington. September 23, 1901. #1:/George Ottis Smith Collection/sgo00056 ID. Smith, G.O. 56 Twin Lakes. South of Twin Lakes Pass. Northwest Boundary. Whatcom County, Washington. September 23, 1901. #1:/George Ottis Smith Collection/sgo00057 ID. Smith, G.O. 57 Ridge on east side of West Fork of Silicia Creek, with Custer Ridge in Distance. Same locality as sgo00056. Northwest Boundary. Whatcom County, Washington. September 23, 1901. #1:/Washington-Bulletin 235/sgo00058 ID. Smith, G.O. 58 Rugged topography near forty-ninth parallel, Mount Baker mining district, looking north from Bear Mountain. Okanogan County, Washington. September 1901. Plate 4-B in US Geological Survey Bulletin 235. 1904. #1:/George Ottis Smith Collection/sgo00059 ID. Smith, G.O. 59 Mount Baker, showing relation to Cascade peneplain. Panorama with sgo00060.Same locality as sgo00056. Northwest Boundary. Whatcom County, Washington. September 23, 1901. #1:/George Ottis Smith Collection/sgo00060 ID. Smith, G.O. 60 Canyon of North Nooksak, showing Cascade peneplain. Panorama with sgo00059. Same locality as sgo00056. Northwest Boundary. Whatcom County, Washington. September 23, 1901. #1:/George Ottis Smith Collection/sgo00061 ID. Smith, G.O. 61 Glacier and mountains south of Hannagan Pass. Northwest Boundary. Whatcom County, Washington. September, 1901. #1:/George Ottis Smith Collection/sgo00062 ID. Smith, G.O. 62 Glacier at head of Nooksak Valley. Near Hannagan Pass. Northwest Boundary. Whatcom County, Washington. September, 1901. #1:/George Ottis Smith Collection/sgo00063 ID. Smith, G.O. 63 Northwest Boundary Monument No. 128. Whatcom County, Washington. October 3, 1901. #1:/George Ottis Smith Collection/sgo00064 ID. Smith, G.O. 64 Northwest Boundary Monument No. 128 and vista to west. Whatcom County, Washington. October 3, 1901. #1:/George Ottis Smith Collection/sgo00065 ID. Smith, G.O. 65 Northwest Boundary Monument No. 157. Blaine. Whatcom County, Washington. October 5, 1901. #1:/George Ottis Smith Collection/sgo00066 ID. Smith, G.O. 66 Director George Otis Smith on the 15th anniversary of his appointment as director of the U.S. Geological Survey. Hooe Building, Washington, DC, May 1922. #1:/Washington, DC/hooe0003 ID. Hooe Building 3 Oblique view of the Hooe Building, originally building in 1873 as a department store, was Washington's largest castiron front structure; note the number of flags. Washington DC. 1917. #1:/Washington, DC/hooe0004 ID. Hooe Building 4 Oblique view of the Hooe Building, at 1324-1334 F Street N.W., notice the number of flags. Washington DC. 1917. #1:/Washington, DC/hooe0006 ID. Hooe Building 6 Five men scribing copper plates for map production. Washington DC. 1917. #1:/Washington, DC/hooe0007 ID. Hooe Building 7 Entrance to U.S. Geological Survey headquarters in the Hooe Building, 1330 F Street N.W.; apparently two men about to exit the building. Washington DC. 1917. #1:/Washington, DC/hooe0008 ID. Hooe Building 8 Foyer of the Hooe Building at about 1:50 P.M.: with probably a sign-in book. Washington DC. 1917. #1:/Washington, DC/hooe0009 ID. Hooe Building 9 Unknown. Washington DC. 1917. #1:/Washington, DC/hooe0010 ID. Hooe Building 10 Unknown. Washington DC. 1917. #1:/Washington, DC/hooe0011 ID. Hooe Building 11 Carpentry shop, with the following carpenters at work (left to right): Smith, Horetkampt, Jessie Dorster, N.L. King, and S.C. Bready. Hooe Building. Washington DC. 1917. #1:/Washington, DC/hooe0050 ID. Hooe Building 50 Typical geologist office in the Hooe Building: Washington DC. 1917. #1:/Washington, DC/hooe0051 ID. Hooe Building 51 Typical clerk's office in the Hooe Building: Washington DC. 1917. #1:/Washington, DC/hooe0052 ID. Hooe Building 52 W.H. Sanderson, at work in an office of the Land Classification Board. Washington DC. 1917. #1:/Washington, DC/hooe0053 ID. Hooe Building 53 Typical use of free space for storage in a hallway. Washington DC. 1917. #1:/Washington, DC/hooe0055 ID. Hooe Building 55 Arthur Keith's office, Washington DC. 1917. #1:/Washington, DC/hooe0059 ID. Hooe Building 59 Chief clerk, W.E. Hall, at work in the Water Resources Branch. Washington DC. 1917. #1:/Washington, DC/hooe0060 ID. Hooe Building 60 M.I. Walters (center) and others at work in the Water Resources Branch. Washington DC. 1917. #1:/Washington, DC/hooe0061 ID. Hooe Building 61 N.C. Grover, chief (?), of Water Resources Branch, at work at desk. Washington DC. 1917. #1:/Washington, DC/hooe0062 ID. Hooe Building 62 A.F. Hassan (left) and F.M. Hart looking at camera, in their office in the Topographic Branch. Washington DC. 1917. #1:/Washington, DC/hooe0063 ID. Hooe Building 63 Left to right, H.L. Johnston, A.E. Demaray, and F.M. Hart leaning on table at right, in map drafting room of Topographic Branch. Washington DC. 1917. #1:/Washington, DC/hooe0064 ID. Hooe Building 64 Left to right; F. Walker, F. Sterrett, and J.R. Brown at their desks, Topographic Branch. Washington DC. 1917. #1:/Washington, DC/hooe0065 ID. Hooe Building 65 Robert A. Marshall, chief geographer at work at his desk, Topographic Branch. Washington DC. 1917. #1:/Washington, DC/hooe0066 ID. Hooe Building 66 V.L. Raymond (left) and P.P. Withers, quite possibly supply clerks in their outer office. Washington DC. 1917. #1:/Washington, DC/hooe0067 ID. Hooe Building 67 Various field supplies in storage, note among other things, plate table boards, and tripods center and left. Washington DC. 1917. #1:/Washington, DC/hooe0068 ID. Hooe Building 68 Left to right: E.M. Aten possibly dictating to L.M. Graves, T.R. Burch and H.G. Buhrman in conversation at right, Alaskan Mineral Resources Branch. Washington DC. 1917. #1:/Washington, DC/hooe0069 ID. Hooe Building 69 Alfred H. Brooks working at his desk, notice the rotating bookcase on the left, Alaskan Mineral Resources Branch. Washington DC. 1917. #1:/Washington, DC/hooe0070 ID. Hooe Building 70 A.L. Plaskett, taking dictation from P.S. Smith, and again note the bookcase at right. Alaskan Mineral Resources Branch. Washington DC. 1917. #1:/Washington, DC/hooe0074 ID. Hooe Building 74 F. Sutton engage in discussion a, with apparent visitor, T.G. Gerdine, in the formers office. Topographic Branch. Washington DC. 1917. #1:/Washington, DC/hooe0075 ID. Hooe Building 75 R.C. McKinney grimacing at rear, and A.C. Roberts, obviously posing for the photographer, Topographic Branch. Washington DC. 1917. #1:/Washington, DC/hooe0076 ID. Hooe Building 76 R.C. Wells and other desks in the office of the Chemical Laboratory. Washington DC. 1917. #1:/Washington, DC/hooe0077 ID. Hooe Building 77 Chemistry laboratory, Hooe Building, Washington DC. 1917. #1:/Washington, DC/hooe0078 ID. Hooe Building 78 Specimen storage and examination room. Chemical Laboratory. Washington DC. 1917. #1:/Washington, DC/hooe0080 ID. Hooe Building 80 Photographers at work possibly copying maps for reproduction. Washington DC. 1917. #1:/Washington, DC/hooe0082 ID. Hooe Building 82 Photographic laboratory, and various map reproduction equipment. Washington DC. 1917. #1:/Washington, DC/hooe0083 ID. Hooe Building 83 U.S. Geological Survey library note rotating bookcase at left, next to card catalogs, left to right: J.M. Nickles, J.L.V. McCord original Survey librarian, J.E. Latimer, and Mary Coats. Washington DC. 1917. #1:/Washington, DC/hooe0084 ID. Hooe Building 84 U.S. Geological Survey library note rotating bookcase at left, next to card catalogs, left to right: J.M. Nickles, J.L.V. McCord original Survey librarian, J.E. Latimer, and Mary Coats. Washington DC. 1917. #1:/Bulletin 987/gill0001 ID. Gillennan, E. 1 Nodular limestones of the eagle Mountains. A, Nodular limestone of the lower part of the Finlay limestone, north of Lucky Strike prospect. Hudspeth County Texas. 1945. Published as plate 4-A in U.S. Geological Survey. Bulletin 987 1953. #1:/Bulletin 987/gill0002 ID. Gillennan, E. 2 Nodular limestone of the eagle Mountains. B, Nodular limestone and interbedded shale of the upper part of the Georgetown limestone and the Carpenter member of the Grayson formation. Carpenter Canyon. Hudspeth County, Texas. 1945. Published as plate 4-B in U. S. Geological Survey. Bulletin 987 1953. #1:/Bulletin 987/gill0003 ID. Gillennan, E. 3 Reef limestone volcanic breccia, and fluorspar zones, Eagle Mountains. A, Reef-limestone member of the Grayson formation showing the abundance of reef-making pelecypods, Carpenter Canyson. Hudspeth County, Texas. 1945. Published as plate 5-A in U.S. Geological Survey. Bulletin 987 1953. #1:/Bulletin 987/gill0004 ID. Gillennan, E. 4 Reef limestone volcanic breccia, and fluorspar zones, Eagle Mountains. B, Volcanic breccia of the lower rhyolitic series overlain by the columnar-jointed flows of the upper rhyolitic series. Hudspeth County, Texas. 1945. Published as plate 5-B in U.S. Geological Survey. Bulletin 987 1953. #1:/Bulletin 987/gill0005 ID. Gillennan, E. 5 Reef limestone volcanic breccia, and fluorspar zones, Eagle Mountains. C, Two high-grade fluorspar zones (A), with intervening low-grade zone of brecciated rhyolite (B), Fox claim 10. Hudspeth County, Texas. 1945. Published as plate 5-C in U. S. Geological Survey. Bulletin 987 1953. #1:/Bulletin 987/gill0006 ID. Gillennan, E. 6 Fluorspar specimens from the eagle Mountains. A, Fluorspar from the North ore body, Spar Valley, showing dark-green early fluorite encased in light-green late fluorite. Hudspeth County, Texas. 1945. Published as plate 6-A in U. S. Geological Survey. Bulletin 987 1953. #1:/Bulletin 987/gill0007 ID. Gillennan, E. 7 Fluorspar specimens from the eagle Mountains. B, Fluorspar from pit on Fox claim 1, showing cubes of light-green late fluorite encasing octahedra of dark-green early fluorite. Hudspeth County, Texas. 1945. Published as plate 6-B in U. S. Geological Survey. Bulletin 987 1953. #1:/Fries Collection/fri00001 ID. Fries, C. 1 Basalt coliamns in canyon just below dam at San Miguel Regla. Hidalgo, Mexico. November 1949. #1:/Fries Collection/fri00002 ID. Fries, C. 2 Basalt columns in canyon just below dam at San Miguel Regla. Hidalgo, Mexico. November 1949. #1:/Fries Collection/fri00003 ID. Fries, C. 3 Columnar basalt pavement in bottom of canyon just below dam at San Miguel Hegla. Hidalgo, Mexico. November 1949. #1:/Fries Collection/fri00004 ID. Fries, C. 4 Pot holes eroded in Columnar basalt. Note horizontal markings on columns. Just below dam at San Miguel Regla. Hidalgo, Mexico. November 1949. #1:/Fries Collection/fri00005 ID. Fries, C. 5 Horizontal markings on basalt column in canyon just below dam at San Miguel Regla. Hidalgo, Mexico. November 1949. #1:/Fries Collection/fri00006 ID. Fries, C. 6 Horizontal markings on vertical basalt columns in canyon just below dam at San Miguel Regla. Hidalgo, Mexico. November 1949. #1:/Professional Paper 291/har00001 ID. Harshbarger, J.W. 1 Intertonguing between the Rock Point (Tt wr) and Lukachukai (Ttwl) members of the Wingate sandstone, 3 miles east of Lukachukai. Apache County, Arizona, n.d. Published as figure 4 in U. S. Geological Survey. Professional paper 291. 1957. #1:/Professional Paper 291/har00002 ID. Harshbarger, J.W. 2 The Wingate sandstone at the type locality and the overlying Entrada sandstone near Fort Wingate, The unit in the foreground and middle ground constitutes the Lubadiukai member of the Wingate sandstone (Trwl); the flat-bedded unit at the base of the vertical cliff is the medial silty member (Jem), and the main part of the cliff is the upper sandy member (Jeu) of the Entrada sandstone. The cliff is capped by the Todilto limestone (Jt). McKinley County, New Mexico, n.d. Published as figure 5 in U. S. Geological Survey, Professional paper 291. 1957. #1:/Professional Paper 291/har00003 ID. Harshbarger, J.W. 3 Rock Point member of the Wingate sandstone at the type locality, Little Round Rock, 15 miles south of Rock Point, Upper part of the Chinle formation (TR C); and Rock Point (TR WR) and Lukachukai (TR WL) members of the Wingate sandstone. Apache County, Arizona. n.d. Published as figure 6 in U. S. Geological Survey. Professional paper 291. 1957. #1:/Professional Paper 291/har00004 ID. Harshbarger, J.W. 4 Rock Point member of the Wingate Bandstone, 8 miles oouth of Indian Wells. In this area the unit weathers into a smooth slope because it contains a high percentage of silt. Tertiary basalt forms the cap rock. Navajo County, Arizona, n.d. Published as figure 7 in U. S. Geological Survey. Professional paper 291. 1957. #1:/Professional Paper 291/har00005 ID. Harshbarger, J.W. 5 Crosshedding in the Lukachukai member of the Wingate sandstone, 2 miles east of Rock Point. Apache County, Arizona, n.d. Published as figure 8 in U. S. Geological Survey. Professional paper 291. 1957. #1:/Professional Paper 291/har00006 ID. Harshbarger, J.W. 6 Glen Canyon group along Echo Cliffs, 6 miles north of Moenave. The upper part of the Chinle formation (Tr c); Dinosaur Canyon sandstone member (Tr md) and Springdale sandstone member (Tr ms) of the Moenave formation; silty facies of the Kayenta formation (Jks); overlain by the Navajo sandstone (Jn). Coconino County, Arizona, n.d. Published as figure 9 in U. S. Geological Survey. Professional paper 291. 1957. #1:/Professional Paper 291/har00007 ID. Harshbarger, J.W. 7 Dinosaur Canyon sandstone member of the Moenave formation at Kachina Point, 20 miles north of Leupp, showing upper part of Lukachukai member of the Wingate sandstone, Dinosaur Canyon sandstone, and cliff capped by the lower part of the silty facies of the Kayenta formation. Coconino County, Arizona. n.d. Published as figure 11 in U. S. Geological Survey. Professional paper 291. 1957. #1:/Professional Paper 291/har00008 ID. Harshbarger, J.W. 8 Contact between the Chinle formation (Tr c) and the Dinosaur Canyon sandstone member of the Moenave formation (Tr md) near Dinosaur Canyon. Coconino County, Arizona. n.d. Published as figure 12 in U. S. Geological Survey. Professional paper 291. 1957. #1:/Professional Paper 291/har00010 ID. Harshbarger, J.W. 10 The silty facies of the Kayenta formation, 3 miles southwest of Tuba City. Coconino County, Arizona. n.d. Published as figure 14 in U. S. Geological Survey. Professional paper 291. 1957. #1:/Professional Paper 291/har00009 ID. Harshbarger, J.W. 9 The type locality of the Kayenta formation, 1 mile northeast of Kayenta. Lukachukai member of the Wingate sandstone (Trwl); typical facies of the Kayenta formation (Jk); overlain by the Navajo sandstone (Jn). Navajo County, Arizona, n.d Published as figure 13 in U. S. Geological Survey. Professional paper 291. 1957. #1:/Professional Paper 291/har00011 ID. Harshbarger, J.W. 11 Crossbedding in the Navajo sandstone, 5 miles south of Red Lake, Coconino County, Arizona, n.d. Published as figure 17 in U. S. Geological Survey. Professional paper 291. 1957. #1:/Professional Paper 291/har00012 ID. Harshbarger, J.W. 12 Contact between the Lukachukai member of the Wingate sandstone (Trwl) and the Kayenta formation (Jk), 16 miles east of Rock Point. Apache County, Arizona. n.d. Published as figure 21 in U. S. Geological Survey. Professional paper 291. 1957. #1:/Professional Paper 291/har00013 ID. Harshbarger, J.W. 13 The contact between the Navajo sandstone (Jn) and the Carmel formation (Jc), 8 miles southwest of Red Lake. Coconino County, Arizona, n.d. Published as figure 22 in U. S. Geological Survey. Professional paper 291. 1957. #1:/Professional Paper 291/har00014 ID. Harshbarger, J.W. 14 Large sand-filled mud cracks in the basal part of the Carmel formation on the southeast flank of Boundary Butte anticline, 3 miles west of Red Mesa. Apache County, Arizona, n.d. (photo by C.H. Dane. Similiar to Dane photo 100). Published as figure 23 in U. S. Geological Survey. Professional paper 291. 1957. #1:/Professional Paper 291/har00015 ID. Harshbarger, J.W. 15 The conspicuous white sandstone facies of the Carmel formation in Bat Canyon, 20 miles east of Tuba City. This facies resembles the Winsor formation in southern Utah. Navajo County, Arizona, n.d. Published as figure 24 in U. S. Geological Survey. Professional paper 291. 1957. #1:/Professional Paper 291/har00016 ID. Harshbarger, J.W. 16 Lower silty member of the Summerville formation, 4 miles east of Mexican Water. Carmel formation (Jc); Entrada sandstone (Je); summervllle formation (Js); Bluff sandstone (Jb); and Salt Wash member of the Morrison formation (Jms). Apache County, Arizona, n.d. Published as figure 27 in U. S. Geological Survey, Professional paper 291. 1957. #1:/Professional Paper 291/har00017 ID. Harshbarger, J.W. 17 Slumping in the Summerville formation, 2 miles northeast of Red Mesa, Arizona, Carmel formation (Jc); medial silty member of the Entrada sandstone (Jem); Summerville formation (Js); Bluff sandstone (Jb). San Juan County, Utah. n.d. Published as figure 28 in U. S. Geological Survey. Professional paper 291. 1957. #1:/Professional Paper 291/har00018 ID. Harshbarger, J.W. 18 Upper sandy member of the Summerville formation 1 mile southwest of Crystal, San Juan County, New Mexico. n.d. Published as figure 29 in U. S. Geological Survey. Professional paper 291. 1957. #1:/Professional Paper 291/har00019 ID. Harshbarger, J.W. 19 The type locality of the Cow Springs sandstone, 4 miles east of Cow Springs, Coconino County, Arizona, n.d. Published as figure 33 in U. S. Geological Survey. Professional paper 291. 1957. #1:/Professional Paper 291/har00020 ID. Harshbarger, J.W. 20 The Morrison formation on Black Mesa, 5 miles south of Kayenta. Salt Wash member (Jms), Recapture member (Jmr), Westwater Canyon member (Jmw), and thin cap of Dakota sandstone. Navajo County, Arizona, n.d. Published as figure 34 in U. S. Geological Survey. Professional paper 291. 1957. #1:/Professional Paper 291/har00021 ID. Harshbarger, J.W. 21 The Bluff sandstone and the Recapture member of the Morrison formation, 8 miles north of Red Mesa, Arizona. Bluff sandstone (Jb) and Recapture member (Jmr) . The Salt Wash member of the Morrison is absent in this area. San Juan County, Utah. n.d. Published as figure 35 in U. S. Geological Survey. Professional paper 291. 1957. #1:/Professional Paper 291/har00022 ID. Harshbarger, J.W. 22 The unconformity at the base of the Dakota sandstone, 4 miles north of Red Lake. Cow Springs sandstone (Jcs), Dakota sandstone (Kd), and Mancos shale (Km). Coconino County, Arizona, n.d. Published as figure 38 in U. S. Geological Survey. Professional paper 291. 1957. #1:/Professional Paper 274-B/wkm00003 ID. Waage, K. M. 3 Tabular sandstone of the Plainview sandstone member of the South Platte formation (above) in discomformable contact(D) with massive light-colored sandstone and claystone of the Lytle formation at Spring Canyon dam site. Fort Collins quadrangle, Larimer County, Colorado, ca. 1951. Published as figure 8 in U. S. Geological Survey. Professional paper 274-B. 1955. #1:/Professional Paper 274-B/wkm00004 ID. Waage, K. M. 4 Silty shale and basal sandstone of the Plainview sandstone member of the South Platte formation in disconformable contact (at man's hand) with argillaceous sandstone of the underlying Lytle formation on hogback south of Eldorado Springs. Boulder County, Colorado, ca. 1951. Published as figure 9 in U. S, Geological Survey. Professional paper 274-B. 1955. #1:/Professional Paper 274-B/wkm00005 ID. Waage, K. M. 5 Second shale subunit of the South Platte formation, north side of Ralston Reservoir. K, base Kassler sandstone member, Mb, second key marker bed; Mz, platy siltstone of marine zone. Jefferson County, Colorado, ca. 1951. Published as figure 12 in U. S. Geological Survey. Professional paper 274-B. 1955. #1:/Professional Paper 274-B/wkm00006 ID. Waage, K. M. 6 Characteristic exposure of base of main clay bed in the Van Bibber shale member of the South Platte formation. First key marker (Mb) rests on ripple-marked surface. Jefferson County, Colorado, ca. 1951. Published as figure 13 in U. S. Geological Survey. Professional paper 274-B. 1955. #1:/Professional Paper 274-B/wkm00007 ID. Waage, K. M. 7 Sandy, nonmarine phase of the South Platte formation south of Willow Creek gap. Upper ledge is Kassler sandstone member, lower ledge contains Plainview sandstone member (P) and Lytle formation (L); saddle between ledges is chiefly in friable third sandstone subunit. Kassler quadrangle. Douglas County, Colorado, ca. 1951. Published as figure 14 in U. S. Geological Survey. Professional paper 274-B. 1955. #1:/Professional Paper 274-B/wkm00008 ID. Waage, K. M. 8 Part of the South Platte formation in the intermediate phase, south of Little Thompson Creek. Us, beds equivalent to upper sandstone unit and Ts, beds equivalent to third sandstone subunit. Beds below Ts are locally thickened equivalents of third shale subunit. The Plainview sandstone member is just out of sight at base of shale slope. Loveland quadrangle. Larimer County, Colorado, ca. 1951. Published as figure 15 in U. S. Geological Survey. Professional paper 274-B. 1955. #1:/Professional Paper 274-B/wkm00009 ID. Waage, K. M. 9 Typical double hogback formed by marine phase of the South Platte formation near Boxelder Creek. Upper sandstone (Us) forms hogback to right, Plainview sandstone member (P) holds dip slope of hogback to left, marine shale (Ms) lies between light-colored sandstone lens in Lytle formation lies in slope below Lytle-South Platte contact (D). Larimer County, Colorado, ca. 1951. Published as figure 16 in U. S. Geological Survey. Professional paper 274-B. 1955. #1:/Professional Paper 274-B/wkm00010 ID. Waage, K. M. 10 Characteristic exposure of the Dakota group in the Denver area, looking north in Dutch Creek gap. Us upper sandstone subunit; K, Kassler sandstone member; and P, Plainview sandstone member of South Platte formation. D, disconformity between Lytle (L) and South Platte formations, U, approximate Morrison-Lytle contact. Indian Hills quadrangle. Jefferson County, Colorado, ca. 1951. Published as figure 18 in U, S. Geological Survey. Professional paper 274-B. 1955. #1:/Professional Paper 274-B/wkm00011 ID. Waage, K. M. 11 Plainview sandstone member of the South Platte formation (right) and upper part of the Lytle formation (left) in railroad cut at Plainview. Man stands at basal conglomeratic sandstone of Plainview member. D, Lytle (L) South Platte disconformity. Jefferson County, Colorado, ca, 1951. Published as figure 11 in U. S. Geological Survey, Professional paper 274-B. 1955. #1:/Professional Paper 274-B/wkm00012 ID. Waage, K. M. 12 Exposure of complete section of the Purgatoire formation at Parkdale. Me, contact of the Morrison formation and the Lytle sandstone member of the Purgatoire formation; Gc, contact of the Lytle sandstone and Glencairn shale members of the Purgatoire formation; DC contact of the Glencairn shale member of the Purgatoire formation and the Dakota sandstone. Fremont County, Colorado. ca. 1944. Published as figure 3, in U. S. Geological Survey. Bulletin 993. 1953. #1:/Bulletin 993/wkm00013 ID. Waage, K. M. 13 Exposures of the top of the Lytle sandstone member and most of the Glencairn shale member of the Purgatoire formation on Skyline Hogback, Canon City. Sandstone capping the crest is upper of two sandstone zones in the Glencairn. Gc, contact of the Lytle sandstone and the Glencairn shale members of the Purgatoire formation. Fremont County, Colorado. ca. 1944. Published as figure 4 in U. S. Geological Survey. Bulletin 993. 1953. #1:/Bulletin 993/wkm00014 ID. Waage, K. M. 14 The Dry Creek Canyon member of the Dakota sandstone on the west wall of Dry Creek Canyon. U, contact with the upper sandstone unit; L, contact with the lower sandstone unit. Pueblo County, Colorado. ca. 1944 Published as figure 5 in U. S. Geological Survey. Bulletin 993. 1953. #1:/Bulletin 993/wkm00015 ID. Waage, K. M. 15 Close-up of lower part of Dry Creek Canyon member of Dakota sandstone. The hammer head rests on the planed surface of the lower sandstone unit. Pueblo County, Colorado, ca. 1944. Published as figure 6 in U. S. Geological Survey. Bulletin 993. 1953. #1:/Bulletin 993/wkm00016 ID. Waage, K. M. 16 Clay-bearing zone of the Dry Creek Canyon member of the Dakota sandstone in Dry Creek Canyon. Roof rock, R, rests disconformably on flint clay. F. Pueblo County, Colorado. ca. 1944. Published as figure 9 in U. S. Geological Survey. Bulletin 993. 1953. #1:/Bulletin 993/wkm00017 ID. Waage, K. M. 17 Seven-foot bed of flint clay of the Dry Creek Canyon member of the Dakota sandstone under a lens of roof-rock sandstone in Dry Creek Canyon. Floor of the entry is sandstone with interstitial flint clay. Pueblo County, Colorado, ca. 1944. Published as figure 10 in U. S. Geological Survey. Bulletin 993. 1953. #1:/Bulletin 993/wkm00018 ID. Waage, K. M. 18 Flint clay from the Dry Greek Canyon member of the Dakota sandstone. Pueblo County, Colorado, ca, 1944 Published as figure 12 in U, S. Geological Survey. Bulletin 993. 1953. #1:/Bulletin 993/wkm00019 ID. Waage, K. M. 19 Plastic clay from the Dry Creek Canyon member of the Dakota sandstone. Pueblo County, Colorado, ca, 1944. Published as figure 13 in U, S. Geological Survey. Bulletin 993. 1953, #1:/Bulletin 1102/wkm00020 ID. Waage, K. M. 20 Two types of refractory clayrock from the Van Bibber Shale Member of the South Blatte Formation. Refractory clay shale from the ripple clay shale bed. Douglas County, Colorado. 1952. Published as plate 3-A in U.S. Geological Survey. Bulletin 1102. 1961. #1:/Bulletin 1102/wkm00021 ID. Waage, K. M. 21 Two types of refractory clayrock from the Van Bibber Shale Member of the South Platte Formation. Refractory claystone from the Helmer Claystone bed. Douglas County, Colorado. 1952. Published as plate 3-B in U.S. Geological Survey. Bulletin 1102. 1961. #1:/Bulletin 1102/wkm00022 ID. Waage, K. M. 22 Inocermaus Comancheanus and I. Bellvuensis in the South Platte Formation. Platy siltsone of the second shale Indian Hills quadrangle. Jefferson County, Colorado. 1952. Published as plate 4-A in U.S. Geological Survey. Bulletin 1102. 1961. #1:/Bulletin 1102/wkm00023 ID. Waage, K. M. 23 Inocermaus Comancheanus and I. Bellvuensis in the South Platte Formation. Equivalent limestone beds near Bellevue. Larimer County, Colorado. 1952. Published as plate 4-B in U.S. Geological Survey. Bulletin 1102. 1961. #1:/Bulletin 1102/wkm00024 ID. Waage, K. M. 24 Ripple-marked upper surface of the third sandstone of the South Platte Formation west of the Helmer mine, Douglas County, Colorado. 1952. Published as plate 5 in U.S. Geological Survey. Bulletin 1102. 1961. #1:/Bulletin 1102/wkm00025 ID. Waage, K. M. 25 Ripple clay shale in old opening, one-tenth mile south of the Helmer mine. R, ripple-marked sandstone surface. Note interbedded silt that is typical of this unit in the Douglas County area, Douglas County, Colorado. 1952. Published as plate 6 in U.S. Geological Survey. Bulletin 1102. 1961. #1:/Bulletin 1102/wkm00026 ID. Waage, K. M. 26 Basal conglomeratic sandstone of South Platte Formation. Disconformable on sandstone of the Lytle Formation south of Dutch Creek. Jefferson County, Colorado. 1952. Published as plate 7 in U.S. Geological Survey. Bulletin 1102. 1961. #1:/Bulletin 1102/wkm00027 ID. Waage, K. M. 27 Combined Kassler Sandstone Member and first sandstone of the South Platte Formation capping the hogback. View northward from Massey Draw. Jefferson County, Colorado. 1952. Published as plate 8 in U.S. Geological Survey. Bulletin 1102. 1961. #1:/Harris Collection/ha000001 ID. Harris, A. 1 Magnified in electron scanning micrograph to reveal their variety of shape, the .03-inch conodonts can serve as geologic markers for possible oil sites. These samples, discovered in central Nevada, range in age from 360 million to 500 million years old. Nevada, n.d. #1:/Professional Paper 264-I/aer00001 ID. Applin, E.R. 1 Barlowfauna. A biofacies of Woodbineage in the southeastern Gulf Coast Region, United States. Published as plate 48 in U. S. Geological Survey. Professional paper 264-I. 1955.> Plate 48. FIGURES 1, 2. Reophax dcckeri Tappan (p. 190). 1. Finely arenaceous hypotype, USNM P 2156, X 40. 2. Coarsely arenaceous hypotype, USNM P 2157, X 40. 3. Haplophragmoides lanysdalensis Applin, n. sp. (p. 191). Side view of holotype, USNM P 2158, X 30. 4. Gaudryina barlowensis Applin, n. sp. (p. 192). Holotype, USNM P 2160, X 40. 5,6. Acruliammina longa (Tappan). (p. 193). 5. Initial end, hypotype, USNM P 2163, X 30. 6. Attached apertural end, hypotype, USNM P 2164, X 30. 7-9. Placopsilina langsdalensis Applin, n. sp. (p. 193). 7. Holotype, USNM P 2165, X 40. 8. Initial end broken specimen, paratype, USNM P 2167, X 40. 9. Slightly crushed paratype, USNM P 2166, X 40. 10,11. Quinqueloculina morentani Cushman, var. barlowensis Applin, n. var. (p. 192). 10. Holotype, USNM P 2161, X 40. 11. Opposite side of paratype, USNM P 2162, X 40. 12. Robulus munsteri (Roemer) Cushman. (p. 192). Side view of hypotype, USNM P 2168, X 30. 13, 14. Lenticulina cyprina (Vieaux) Frizzell. (p. 194). Side views of hypotypes, USNM P 2169 and P 2170, X 40. 15. Citharina recta (Reuss) Frizzell. (p. 194). Hypotype, USNM P 2174, X 30. Frondicularia barlowensis Applin, n. sp. (p. 195). 16. Nearly complete specimen of holotype showing general contour, USNM P 2175, X 30. 17. Broken specimen of paratype showing chamber arrangement, USNM P 2176, X 30. 18-20. Nodosaria affinis Reuss var. (p. 194). 18. Apertural end of form with inflated chambers, hypotype, USNM P 2172, X 30. 19. Initial end. hypotype, USNM P 2173, X 30. 20. Apertural end of form with chambers slightly inflated, hypotype, USNM P 2171, X 40. 21,22. Valvulineria infrequens Morrow var. (p. 195). 21. Dorsal view, hypotype, USNM P 2184, x 40. 22. Ventral view, hypotype, USNM P 2177, x 40. 23,34. Globigerina cf. cretacea d'Orbigny.(p. 196). 23. Dorsal view, hypotype, USNM P 2180, x 40. 24. Ventral view, hypotype, USNM P 2181, X 40. 25,26. Globorotalia cushmani Morrow, (p. 196). 25. Dorsal view, hypotype, USNM P 2178, X 30. 26. Ventral view, hypotype, USNM P 2179, X 40. 27,28. Anomalina petita Carsey. (p. 197). 27. Ventral view, hypotype, USNM P 2183, X 40. 28. Dorsal view, hypotype, USNM P 2182, X 40. #1:/Professional Paper 264-I/aer00002 ID. Applin, E.R. 2 Barlowfauna. A biofacies of Woodbineage in the southeastern Gulf Coast Region, United States. Published as plate 49 in U. S. Geological Survey. Professional paper 264-I. 1955.> Plate 49 (Figures 3, 4, 6 after Cushman and Applin, 1946; figures 1, 2, 5 after Cushman and Applin, 1947.) FIGURE 1. Ammobaculites agrestis Cushman and Applin. (p. 191). a, side view; b, peripheral view; X 60. 2. Haplophragmoides advenus (Cushman and Applin) Frizzell. (p. 191). a, side view; b, aperturai view; X 60. 3. Trochammina rainwateri Cushman and Applin. (p. 192). a, dorsal view; b, ventral view; c, peripheral view; X 75. 4. Ammobaculoides pLummerae Loeblich. (p. 191). a, side view; b, aperturai view; X 75. 5. Anomalina obesa Cushman and Applin. (p. 197). a, side view; b, peripheral view; X 120. 6. Ammobaculites junceus Cushman and Applin. (p. 191). a. side view; b, aperturai view; X 75. #1:/Circular 788-D/stov0001 ID. Stover, C. 1 Chimney damage in Willits from the northern California earthquake of November 22, 1977. Mendocino County, California. (Photo by R. E. Wallace) Published as figure 13 in U. S. Geological Survey. Circular 788-D. 1979. #1:/Bulletin 1431/ccc00001 ID. Cameron, C.C. 1 Sopchoppy River, a view north from U. S. Forest Service Route 329. Wakulla County, Florida, n.d. Published as figure 3 in U. S. Geological Survey. Bulletin 1431. 1977. #1:/Bulletin 1431/ccc00002 ID. Cameron, C.C. 2 Bay swamp near Monkey Creek. View looking toward swamp from pine-palmetto flatwoods in the foreground. Wakulla County, Florida, n.d. Published as figure 8 in U. S. Geological Survey. Bulletin 1431. 1977. #1:/Bulletin 1431/ccc00003 ID. Cameron, C.C. 3 Pine-palmetto flatwoods near the Sopchoppy River. Wakulla County, Florida, n.d. Published as figure 9 in U. S. Geological Survey. Bulletin 1431. 1977. #1:/Bulletin 1431/ccc00004 ID. Cameron, C.C. 4 Limestone of the Saint Marks Formation cropping out at edge of Sopchoppy River. Pine-palmetto flatwoods on sand overlying the limestone. Wakulla County, Florida, n.d. Published as figure 10 in U. S. Geological purvey. Bulletin 1431. 1977. #1:/Bulletin 1494/ccc00005 ID. Cameron, C.C. 5 View of Big Glade, a peat bog included in the Cranberry Glades. Cranberry Wilderness Study Area. Pocahontas County, West Virginia. 1977. Published as figure 16 in U. S. Geological Survey. Bulletin 1494. 1981. #1:/Bulletin 1687/bem00001 ID. Brouwers, E.M. 1 The Beringian Ancestry of Phenacomys (Rodentia: Cricetidae) and the Beginning of the Modern Arctic Ocean Borderland Biota. Published in the U. S. Geological Survey. Bulletin 1687. 1987> Scanning electron micrographs of the diagnostic ostracode species from the Fish Creek section. Stratigraphic positions of localities are shown on figure 3 except for 83-EB-187, which is from Miluveach River, and HLA-12, which is from a borehole taken in the inner shelf off Prudhoe Bay. [Bar scale = 100 micrometers] Figure 1. Pterygocythereis n. sp. Exterior of left valve, female. Locality 83-EB-187A. 2. Rabilimis paramirabilis (Swain, 1963). Exterior of left valve, male. Locality 83-EB-187A. 3. Rabilimis septentrionalis (Brady, 1866). Exterior of left valve, male. Locality 83-EB-187. 4. Rabilimis mirabilis (Brady, 1868). Exterior of left valve, male. Locality HLA-12, 27.5-28.0 ft. 5. Robertsonites tuberculata (Sars, 1865). Exterior of left valve, juvenile. Locality 83-EB-183. 6. Cytheretta teshekpukensis Swain, 1963. Exterior of right valve, male. Locality 83-EB-183. 7. Loxoconcha venepidermoidea Swain, 1963. Exterior of left valve. Locality 83-EB-183. 8. Heterocyprideis sorbyana (Jones, 1856). Exterior of left valve, male. Locality 83-EB-183. 9. Sarsicytheridea bradii (Norman, 1865). Exterior of right valve, male. Locality 83-EB-178. 10. Cytheropteron pyramidale of Neale and Howe, 1975. Exterior of left valve. Locality 83-EB-181. Pterygocythereis, Rabilimis , Robertsonites, Cytheretta, Loxoconcha, Heterocyprideis, Sarsicytheridea, and Cytheropteron. #1:/Professional Paper 1170-E/dbc00001 ID. Dusel-Bacon, C. 1 Marble nodule (above hammer) in sillimanite gneiss from north-central part of gneiss body. Subhorizontal and horizontal foliation and recumbent folds are indicated by fracture pattern and subtle banding on weathered, lichen-covered outcrop. Goodpaster district, Yukon region, Alaska, ca. 1977. Published as figure 3 in U. S. Geological Survey. Professional paper 1170-E. 1983. #1:/Professional Paper 1170-E/dbc00002 ID. Dusel-Bacon, C. 2 Irregular, interfingering contact between granitic rock (right) and sillimanite-biotite gneiss from south-central part of gneiss body. Goodpaster district, Yukon region, Alaska. ca. 1977. Published as figure 4 in U. S. Geological Survey. Professional paper 1170-E. 1983. #1:/Professional Paper 1170-E/dbc00003 ID. Dusel-Bacon, C. 3 Goodpaster district, Yukon region, Alaska. 1980. Published as Figure 5 in U. S. Geological Survey. Professional paper 1170-E. 1983.> FIGURE 5. Photomicrographs showing-textural relations in sillimanite gneiss, equigranular feldspathic rock, and pelitic schist Andalusite (A); biotite (bi); cordierite (co); fibrolite (F); garnet (G); kyanite (ky); muscovite (mu); orthoclase (or); piagioclase (pi); quartz (qu): sillimanite (sil); staurolite (st). A, Prismatic sillimanite in garnetiferous sillimanite gneiss from north-central part of gneiss body (locality 22, fig. 2). Sillimanite occurs adjacent to garnet, in quarts folia, and within and around biotite. Note transverse partings in largest sillimanite prisms. Plane-polarized light. B, Sheaflike mats of fibrolite with transverse partings (locality 27, fig. 2) in sillimanite gneiss. In this sample (from central area of gneiss body), fibrolitic sillimanite occurs adjacent to quartz grains rather than biotite, as more commonly is the case. Plane-polarized light. C, Finely acicular sillimanite that appears to be replacing biotite in cordierite-sillimanite gneiss from central part of gneiss body (locality 28, fig. 2). Plane-polarized light. D, Xenoblastic cordierite from central part of gneiss body (locality 29, fig. 2). Note dark alteration (chlorite?) along cracks and preferential concentration of minute grains of sillimanite and biotite within cordierite. Crossed polarizers. E, Zoned andalusite grain rimmed by fringe of fibrolitic sillimanite in equigranular feldspathic rock (locality 17, fig. 2). Plane-polarized light. F, Oscillatory zoning in piagioclase grain in same rock as E. Crossed polarizers. G, Nearly total replacement of garnet porphyroblast in staurolite-3-aluminum silicate-quartz-mica schist north of the Salcha River (locality 4, fig. 2). Deflection of foliation around knot of remnant garnet granules, biotite. quartz. minor muscovite, and fibrolite outlines area of former porphyroblast. Crossed polarizers, H, Association of staurolite, kyanite. and garnet in 3-aluminum-silicate-faearing schist east of the gneiss body (locality 9, fig. 2). Staurolite shares common grain boundary with kyanite, evidence of their equilibrium relationship. Plane-polarized light. I. Acicular fringe of sillimanite that has grown on margin of small andalusite xenoblast in staurolite-bearing quartz-mica schist east of South Fork of the Salcha River (locality 10, fig. 2). Andalusite and sillimanite present in trace amounts only. Opaque mineral is probably ilmenite. Plane-polarized light. J, Kyanhe included in and growing on margin of andalusite porphyroblasts in garnetiferous staurolite-kyanite-andalusite-biotite schist east of South Fork of the Salcha River (locality 11, fig. 2). Textural relations imply that kyanite crystallized before anaalusite. Plane-polarized light. K, Irregularly shaped patch of staurolite adjacent to fibrolitic sillimanite in sample of garnet-staurolite-3-aluminum silicate-mica schist, north of the Salcha River near its North Fork (locality 8, fig, 2). Appearance of stauroiite in photo and its spongy appearance due to numerous quartz inclusions elsewhere in thin section suggest staurolite may be unstable. Fibrolitic sillimanite is associated with biotite, from which at least part of it may have formed. The proximity of unstable staurolite and apparently newly crystallized sillimanite also allow the possibility that staurolite may have been consumed in a siliimanite-producing reaction. Plane-polarized light. L. Fibrolitic siliimanite and andalusite growing on opposite ends of the same biotite crystal in sample of figure 5G. Note continuation of biotite in matrix into andalusite xenoblast Fibrolitic siilimanite is present in trace amounts and appears to replace biotite. Plane-polarized light. #1:/Professional Paper 1170-E/dbc00004 ID. Dusel-Bacon, C. 4 Goodpaster district, Yukon region, Alaska. 1980. Published as Figure 5 in U. S. Geological Survey. Professional paper 1170-E. 1983. #1:/Professional Paper 1170-E/dbc00005 ID. Dusel-Bacon, C. 5 Goodpaster district, Yukon region, Alaska. 1980. Published as Figure 5 in U. S. Geological Survey. Professional paper 1170-E. 1983. #1:/Professional Paper 1170-E/dbc00006 ID. Dusel-Bacon, C. 6 Goodpaster district, Yukon region, Alaska. 1980. Published as Figure 5 in U. S. Geological Survey. Professional paper 1170-E. 1983. #1:/Professional Paper 1170-E/dbc00007 ID. Dusel-Bacon, C. 7 Goodpaster district, Yukon region, Alaska. 1980. Published as Figure 5 in U. S. Geological Survey. Professional paper 1170-E. 1983. #1:/Professional Paper 1170-E/dbc00008 ID. Dusel-Bacon, C. 8 Goodpaster district, Yukon region, Alaska. 1980. Published as Figure 5 in U. S. Geological Survey. Professional paper 1170-E. 1983. #1:/Professional Paper 1170-E/dbc00009 ID. Dusel-Bacon, C. 9 Goodpaster district, Yukon region, Alaska. 1980. Published as Figure 5 in U. S. Geological Survey. Professional paper 1170-E. 1983. #1:/Professional Paper 1170-E/dbc00010 ID. Dusel-Bacon, C. 10 Goodpaster district, Yukon region, Alaska. 1980. Published as Figure 5 in U. S. Geological Survey. Professional paper 1170-E. 1983. #1:/Professional Paper 1170-E/dbc00011 ID. Dusel-Bacon, C. 11 Goodpaster district, Yukon region, Alaska. 1980. Published as Figure 5 in U. S. Geological Survey. Professional paper 1170-E. 1983. #1:/Professional Paper 1170-E/dbc00012 ID. Dusel-Bacon, C. 12 Goodpaster district, Yukon region, Alaska. 1980. Published as Figure 5 in U. S. Geological Survey. Professional paper 1170-E. 1983. #1:/Professional Paper 1170-E/dbc00013 ID. Dusel-Bacon, C. 13 Goodpaster district, Yukon region, Alaska. 1980. Published as Figure 5 in U. S. Geological Survey. Professional paper 1170-E. 1983. #1:/Professional Paper 1170-E/dbc00014 ID. Dusel-Bacon, C. 14 Goodpaster district, Yukon region, Alaska. 1980. Published as Figure 5 in U. S. Geological Survey. Professional paper 1170-E. 1983. #1:/Kiteley Collection/klw00001 ID. Kiteley, L. W. 1 Foreshore deposits (Unit 39A., p.29) in the lower part of Sandstone C, Francis Ranch seetion, southeastern Wyoming, From top of cliff to grassy ledge is about 4m. (13 ft). Stratigraphy and depositional environments of the Pierre Shale in the northern Denver basin. Laramie County, Wyoming. ca. 1980. #1:/Kiteley Collection/klw00002 ID. Kiteley, L. W. 2 Kiteley, L. W. 2 Clay galls in the upper part of the Hygiene Sandstone Member in NE 1/4 NW 1/4 sec. 23, T. 8 N., R. 69 W. Stratigraphy and depositional environments of the Pierre Shale in the northern Denver basin. Larimer County, Colorado. ca. 1980. #1:/Kiteley Collection/klw00003 ID. Kiteley, L. W. 3 Rocky Ridge Sandstone Member, in the Larimer County Canal in SW 1/4 sec. 24, T. 8 N., R. 69 W., showing bedding character of the unit. Rule for scale. Stratigraphy and depositional environments of the Pierre Shale in the northern Denver basin. Larimer County, Colorado. ca. 1980. #1:/Kiteley Collection/klw00004 ID. Kiteley, L. W. 4 Rocky Ridge Sandstone Member, in the Larimer County Canal in SW 1/4 sec. 24, T. 8 N. , R. 69., showing large brownweathering calcareous sandstone concretions. Rule for scale. Stratigraphy and depositional environments of the Pierre Shale in the northern Denver basin. Larimer County, Colorado, ca. 1980. #1:/Kiteley Collection/klw00005 ID. Kiteley, L. W. 5 Larimer Sandstone exposed in a road cut on Highway 287, NW 1/4 NW 1/4 sec. 12, T. 6 N., R. 69 W., showing low-angle cross-beds. Rule for scale. Stratigraphy and depositional environments of the Pierre Shale in the northern Denver basin. Larimer County, Colorado. ca. 1980. #1:/Kiteley Collection/klw00006 ID. Kiteley, L. W. 6 Larimer Sandstone at the Larimer County Canal, sec. 24, T. 8 N., R. 69 W., showing bioturbated zone at base of exposure. Pencil for scale. Stratigraphy and depositional environments of the Pierre Shale in the northern Denver basin. Larimer County, Colorado. ca. 1980. #1:/Kiteley Collection/klw00007 ID. Kiteley, L. W. 7 Larimer Sandstone at Larimer County Canal, sec. 24, T. 8 N. , R. 69 W., showing rip-up clay clasts and carbonized fragments in massive-bedded sandstone. Rule for scale. Stratigraphy and depositional environments of the northern Denver basin. Larimer County, Colorado, ca. 1980. #1:/Water Supply Paper 1429/lpe00001 ID. LaMoreaux, P. E. 1 Khorat escarpment from kilometer 45 on Pakthongchai-Kabinburi Road. Thailand. 1954. Published as plate 5-A in U.S. Geological Survey. Water-supply paper 1429. 1958. #1:/Water Supply Paper 1429/lpe00002 ID. LaMoreaux, P. E. 2 Rat Buri Limestone exposed at Pha Nok Khao on Khon Kaen-Loei Road. Thailand. 1954. Published as plate 5-B in U.S. Geological Survey. Water-supply paper 1429. 1958. #1:/Water Supply Paper 1429/lpe00003 ID. LaMoreaux, P. E. 3 Phu Kadung Member of Khorat Series exposed on Nong Bua Lamphu Road west of Udon Thani. Geologists at work at base of exposure. Thailand. 1954. Published as plate 6 in U.S. Geological Survey. Water-supply paper 1429. 1958. #1:/Water Supply Paper 1429/lpe00004 ID. LaMoreaux, P. E. 4 Phra Wihan Member of the Khorat Series exposed near Kilometer 40 on the Udon Thani-Loei Road. Geologist at work at left. Thailand. 1954. Published as plate 7-A in U.S. Geological Survey. Water-supply paper 1429. 1958. #1:/Water Supply Paper 1429/lpe00005 ID. LaMoreaux, P. E. 5 Phu Phan Member of the Khorat Series exposed near Kilometer 55 on the Khorat-Kabinburi Road. Geologists at left and lower center. Thailand. 1954. Published as plate 7-B in U.S. Geological Survey. Water-supply paper 1429. 1958. #1:/Water Supply Paper 1429/lpe00006 ID. LaMoreaux, P. E. 6 Royal well at Wat That Phanom. Below concrete curbing, this dug well is lined with laterite brick. Thailand. 1954. Published as plate 8 in U.S. Geological Survey. Water-supply paper 1429. 1985. #1:/Water Supply Paper 1429/lpe00007 ID. LaMoreaux, P. E. 7 Well at Wat Makham Thao near Khorat, bored by the Royal Department of Health, the only flowing well in the Khorat Plateau. Thailand. 1954. Published as plate 9-A in U.S. Geological Survey. Water-supply paper 1429. 1985. #1:/Water Supply Paper 1429/lpe00008 ID. LaMoreaux, P. E. 8 Screen, 6 inches in diameter, used with plastic casing in construction of shallow bored wells, as part of the program of the Royal Department of Public Health and USOM for development of shallow wells. Workers for scale. Thailand. 1954. Published as plate 9-B in U.S. Geological Survey. Water-supply paper 1429. 1985. #1:/Professional paper 907-C/teb00001 ID. Tourtelot, Elizabeth B. 1 Dolomite (D) filling of voids 1-3 mm across in Nugget Sandstone of Jurassic(?) and Triassic(?) age. Crossed polars; sample CU-28D. Lincoln County, Wyoming. Published as figure 2 in the U.S. Geogical Survey. Professional paper 907-C. 1976. #1:/Professional paper 907-C/teb00002 ID. Tourtelot, Elizabeth B. 2 Navajo Sandstone of Jurassic and Triassic(?) age from the Copper Mine Trading Post. Sandstone cemented by malachite (ma) and with remaining pores filled with cuprite (cr) and chrysocolla (cy). Exposures by reflected light and by light transmitted through crossed polars; sample CU-11 A. Coconino County, Arizona. Published as figure 3 in the U.S. Geological Survey. Professional paper 907-C. 1976. #1:/Professional paper 907-C/teb00003 ID. Tourtelot, Elizabeth B. 3 Spicular limestone from the Kaibab Limestone of Permian age replaced by chalcedony (cd), malachite (ma), and chrysocolla (cy) near the sink hole at Lambs Lake. Exposures by reflected light and by light transmitted through crossed polars; sample CU-15C. Coconino County, Arizona. Published as figure 4 in the U.S. Geological Survey. Professional paper 907-C. 1976. #1:/Professional paper 907-C/teb00004 ID. Tourtelot, Elizabeth B. 4 Nugget Sandstone of Jurassic(?) and Triassic(?) age, showing chalcopyrite (cp) associated with bituminous material (B). Ore minerals may follow a fossil oil-water contact. Exposures by reflected light and by light transmitted through crossed polars; sample CU-28D. Lincoln County, Wyoming. Published as figure 7 in the U.S. Geological Survey. Professional paper 907-C. 1976. #1:/Professional paper 907-C/teb00005 ID. Tourtelot, Elizabeth B. 5 Sulfide replacement of fossil wood from the Agua Zarca Member of the Chinle Formation, at the Nacimiento mine. Reflected light; sample CU-10J. Sandoval County, New Mexico. Published as figure 8 in the U.S. Geological Survey. Professional paper 907-C. 1976. #1:/Professional paper 907-C/teb00006 ID. Tourtelot, Elizabeth B. 6 Fossil wood replaced by massive chalcocite at the Nacimiento mine. Massive replacement may be evidence of supergene enrichment near the water table. Sample provided through the courtesy of Lyle Talbott, Geologist, Earth Resources Co. Sandoval County, New Mexico. Published as figure 9 in the U.S. Geological Survey. Professional paper 907-C. 1976. #1:/Professional paper 907-C/teb00007 ID. Tourtelot, Elizabeth B. 7 Hand sample of the Kupferchiefer from Mansfeld, Germany, showing fossil fish remains. Ore minerals are too fine grained to be visible. Sample supplied through the courtesy of A.V. Heyl. Published as figure 11 in the U.S. Geological Survey. Professional paper 907-C. 1976. #1:/Professional paper 907-C/teb00008 ID. Tourtelot, Elizabeth B. 8 Tourtelot, Elizabeth B. 8 Chalcocite bleb (cc) in carbonate-cemented Garber Sandstone of Permian age. Exposures by reflected light and by light transmitted through crossed polars; sample WRM-73. Garvin County, Oklahoma. Published as figure 12 in the U.S. Geological Survey. Professional paper 907-C. 1976. #1:/Professional paper 907-C/teb00009 ID. Tourtelot, Elizabeth B. 9 Chalcocite disseminated in arkosic siltstone from the Artesia Group of marine Permian rocks near Santa Rosa. Locally the chalcocite(cc) has replaced parts of the framework grains. Exposures by reflected light and by light transmitted through crossed polars; sample CU-5D. Gaudalupe County, New Mexico. Published as figure 13 in the U.S. Geological Survey. Professional paper 907-C. 1976. #1:/Professional paper 907-C/teb00010 ID. Tourtelot, Elizabeth B. 10 Quartzite from the Revett Formation. Exposures by reflected light and by light transmitted through crossed polars. A, Chalcocite (cc) and bornite (bn) interlocked with quartz (Q) and feldspar grains; the relation between sulfide and framework grains probably is a result of low-grade metamorphism. Sample CU-32C; Beecher Peak area. Sanders County, Montana. Published as figure 14A in the U.S. Geological Survey. Professional paper 907-C. 1976. #1:/Professional paper 907-C/teb00011 ID. Tourtelot, Elizabeth B. 11 Quartzite from the Revett Formation. Exposures by reflected light and by light transmitted through crossed polars. B, Chalcopyrite (cp) and bornite (bn) in feldspathic matrix; a sericite seam loops through part of the sulfide. Sample CU-3 IB; Sex Ridge area. Sanders County, Montana. Published as figure 14B in the U.S. Geological Survey. Professional paper 907-C. 1976. #1:/Professional paper 907-C/teb00012 ID. Tourtelot, Elizabeth B. 12 Hand sample of quartzite from the Revett Formation showing weathered rind (without secondary copper minerals) and rich sulfide ore a few centimetres below the surface. Sample provided through the courtesy of J.E. Harrison. Published as figure 15 in the U.S. Geological Survey. Professional paper 907-C. 1976. #1:/Professional paper 907-C/teb00013 ID. Tourtelot, Elizabeth B. 13 Cupriferous drill core of Upper Callanna Beds of Precambrian age from South Flinders Range, South Australia. Specimen supplied by Nigel Rowlands of the Utah Development Company. A, Diagenetic calcite vein cuts the core; an arrow points to the spot where the photomicrograph was taken. Publishes figure 16A in the U.S. Geological Survey. Professional paper 907-C. 1976. #1:/Professional paper 907-C/teb00014 ID. Tourtelot, Elizabeth B. 14 Cupriferous drill core of Upper Callanna Beds of Precambrian age from South Flinders Range, South Australia. Specimen supplied by Nigel Rowlands of the Utah Development Company. B, Photomicrograph shows chalcopyrite (C) grains disseminated through fine-grained carbonaceous host rock. Publishes figure 16B in the U.S. Geological Survey. Professional paper 907-C. 1976. #1:/Professional paper 907-C/teb00015 ID. Tourtelot, Elizabeth B. 15 Native copper (Cu) associated with carbonaceous films (C) in the Nonesuch Shale of Precambrian age. Exposures by reflected light and by light transmitted through crossed polars, sample CU-531. Ontonagon County, Michigan. Published as figure 17 in the U.S. Geological Survey. Professional paper 907-C. 1976. #1:/Professional paper 907-C/teb00016 ID. Tourtelot, Elizabeth B. 16 Native copper (Cu) associated with opaque bituminous matter (B) in the Copper Harbor Conglomerate of Precambrian age. Exposures by reflected and by plain transmitted light; sample CU-53B. Ontonagon County, Michigan. Published as figure 18 in the U.S. Geological Survey. Professional paper 907-C. 1976. #1:/Professional paper 907-C/teb00017 ID. Tourtelot, Elizabeth B. 17 Quartzite from the Revett Formation, Chicago Peak area showing impermeable nature of feldspathic quartzite as a result of low-grade metamorphism. Crossed polars; sample CU-29A. Sanders County, Montana. Published as figure 19 in the U.S. Geological Survey. Professional paper 907-C. 1976. #1:/Professional paper 907-C/teb00018 ID. Tourtelot, Elizabeth B. 18 Argillite from the Revett Formation, Chicago Peak area showing quartz veinlet in a sericite-biotite rock. Crossed polars; sample CU-29F. Sanders County, Montana. Published as figure 20 in the U.S. Geological Survey. Professional paper 907-C. 1976. #1:/Bulletin 1614/bws00001 ID. Bartsch-Winkler, S, 1 Intergrain boundaries in sandstone from the Nanushuk. Displacement of pebble boundary and extensive cracking as a result of compaction pressure. Central North Slope, Alaska. Published as Figure 41A in U, S. Geological Survey. Bulletin 1614, 1985. #1:/Bulletin 1614/bws00002 ID. Bartsch-Winkler, S, 2 Intergrain boundaries in sandstone from the Nanushuk Group. Stylolitic interpretation of rounded quartzose pebbles, probably resulting from high compaction pressures at grain boundaries. Sample 78AAh47L, Tuktu Bluff, magnification 2.5 x 10, photomicrograph. Central North Slope, Alaska. Published as Figure 41B in U.S. Geological Survey. Bulletin 1614. 1985. #1:/Bulletin 1614/bws00003 ID. Bartsch-Winkler, S, 3 Tightly appressed sandstone from the Nanushuk Group, showing squeezing and contortion of less competent framework grains around more resistant grains and into intergranular spaces. Some cracking of resistant grains has also taken place. Sample 77AAH21f Tuktu Bluff; magnification, 6.3 x 10, photomicrograph. Central North Slope, Alaska. Published as Figure 42 in U.S. Geological Survey, Bulletin 1614. 1985. #1:/Bulletin 1614/bws00004 ID. Bartsch-Winkler, S, 4 Replacement by calcite cement in sandstone from the Nanushuk Group, Calcite replacement of detrital grains, leaving a clay rim around original (calcareous?) grain. Sample 78ACh35, Krupa anticline; magnification, 6,3 x 10. Central North Slope, Alaska. Published as Figure 43A in U.S. Geological Survey. Bulletin 1614. 1985. #1:/Bulletin 1614/bws00005 ID. Bartsch-Winkler, S, 5 Replacement by calcite cement in sandstone from the Nanushuk Group. Framework quartz grain appears to float in calcite cement after partial replacement, but relict grain boundary is still visible. Sample 78AChl6, Kurupa anticline; magnification, 16 x 10, photomicrograph. Central North Slope, Alaska. Published as Figure 43B in U.S. Geological Survey. Bulletin 1614. 1985. #1:/Bulletin 1614/bws00006 ID. Bartsch-Winkler, S, 6 Kaolinite fills pore spaces created by dissolution aind (or) replacement of framework grains, in sandstone from the Nanushuk Group. Sample 78ACh54, Kurupa anticline. Central North Slope, Alaska. Published as Figure 44A in U.S. Geological Survey. Bulletin 1614, 1985, #1:/Bulletin 1614/bws00007 ID. Bartsch-Winkler, S, 7 Kaolinite fills pore spaces created by dissolution and (or) replacement of framework grains, in sandstone from the Nanushuk Group. Sample 78ACh67, Kurupa anticline. Magnification, 16 x 10, photomicrographs. Central North Slope, Alaska. Published as Figure 44B, U.S. Geological Survey. Bulletin 1614. 1985. #1:/Bulletin 1614/bws00008 ID. Bartsch-Winkler, S, 8 Kaolinite fills pore spaces created by dissolution and (or) replacement of framework grains, in sandstone from the Nanushuk Group. Books of Hexagonal kaolinite crystals growing in pore space. Sample 78ACh41, Marmot syncline; magnification, X1340, SEM. Central North Slope, Alaska. Published as Figure 44C in U.S. Geological Survey. Bulletin 1614. 1985. #1:/Bulletin 1614/bws00009 ID. Bartsch-Winkler, S, 9 Original porosity is still retained in this sandstone sample from the Nanushuk Group, but some reduction in porosity probably took place during compaction. Quartzose grains were dissolved at grain contacts and welded. At some later stage, minor secondary porosity was created by dissolution of quartzose grains (arrow). Growth of chlorite in pore spaces completes diagenetic cycle. Sample 78ACh32, Kurupa anticline; magnification, 6.3 x 10, photomicrograph. Central North Slope, Alaska. Published as Figure 45 in U.S. Geological Survey. Bulletin 1614, 1985. #1:/Bulletin 1614/bws00010 ID. Bartsch-Winkler, S, 10 Quartz-grain surfaces are coated with chlorite in sandstone from the Nanushuk Group, which may inhibit development of quartz overgrowths. Chlorite cement might facilitate retention of primary porosity by reducing siliceous cementation (presolution). Sample 78AChl79 Kurupa anticline; magnification, X370, SEM. Central North Slopes Alaska. Published as Figure 46A in U.S. Geological Survey. Bulletin 1614, 1985. #1:/Bulletin 1614/bws00011 ID. Bartsch-Winkler, S, 11 Quartz-grain surfaces are coated with chlorite in sandstone from the Nanushuk Group, which may inhibit development of quartz overgrowths. Quartz overgrowth is surrounded by a halo in which no chlorite cement exists. It is uncertain which cement is inhibiting growth of the other. Sample 78ACh32, Kurupa anticline; magnification X319, SEM. Central North Slope, Alaska. Published as Figure 46B in U.S. Geological Survey. Bulletin 1614. 1985. #1:/Bulletin 1614/bws00012 ID. Bartsch-Winkler, S, 12 Quartz overgrowths on sandstone grains after clay formation, Nanushuk Group. Quartzose grains have overgrowths at points of low pressure (pore space) adjeacent to areas that were probably under high pressure (grain contacts). Overgrowths probably develop where clay coatings are absent. A polycrystalline quartz grain (upper left) has a pod of kaolinite growing on its surface. Sample 78ACh23, Kurupa anticline; magnification, 6.3 x 10, photomicrograph. Central North Slope, Alaska. Published as Figure 47A in U.S. Geological Survey. Bulletin 1614. 1985. #1:/Bulletin 1614/bws00013 ID. Bartsch-Winkler, S, 13 Quartz overgrowths on sandstone grains after clay Nanushuk Group. Framework quartz grain with vacuoles by diagenetic clay. Clear areas of quartz-overgrowth (Q) are probably initiated where clay rim is absent, porosity (P) may be created by leaching of siliceous no clay development is taking place in the secondary Sample 78ACh325 Kurupa anticline; magnifications 6.3 photomicrograph. Central North Slope, Alaska. Published as Figure 47B in U.S. Geological Survey, 1614. 1985. #1:/Bulletin 1614/bws00014 ID. Bartsch-Winkler, S, 14 Quartz overgrowths on sandstone grains after clay formation, Nanushup Group. Chlorite cement and quartz overgrowths clog intergranular pore spaces. Sample 78ACh32, Kurupa anticline; magnification,, X 234, SEM. Central North Slope, Alaska. Published as Figure 47C in U.S. Geological Survey. Bulletin 1614. 1985. #1:/Bulletin 1614/bws00015 ID. Bartsch-Winkler, S, 15 Quartzose sandstone from the Nanushuk Group, having abundant quartz-overgrowth development. Sample 78ACh25, Marmot syncline. Iron-rich (?) clay outlines original grain boundaries and overgrowths from adjacent quartz grains in optical continuity with parent grain. Plain light. Magnification, 2.5 x 10. Central North Slope, Alaska. Published as Figure 48A in U.S. Geological Survey. Bulletin 1614. 1985. #1:/Bulletin 1614/bws00016 ID. Bartsch-Winkler, S, 16 Quartzose sandstone from the Nanushuk Group, having abundant quartz-overgrowth development. Sample 78ACh259 Marmot syncline. Iron-ricn (?) clay outlines original grain boundaries and overgrowths from adjacent quartz grains in optical continuity with parent grain. Polarized light. Magnification, 2.5 x 10. Central North Slope, Alaska. Published as Figure 48B in U.S. Geological Survey. Bulletin 1614. 1985. #1:/Bulletin 1614/bws00017 ID. Bartsch-Winkler, S, 17 Quartzone sandstone from the Nanushuk Group, having abundant quartz-overgrowth development. Sample 78ACh25, Marmot syncline. Quartz cement migrated from the monocrystalline quartz grain into the adjacent polycrystalline quartz grain, which has been corroded. Plain light. Magnification, 6.3 x 10, photomicrographs. Centra] North Slope, Alaska. Published as Figure 48C in U.S. Geological Survey. Bulletin 1614. 1985. #1:/Bulletin 1614/bws00018 ID. Bartsch-Winkler, S, 18 Quartzone sandstone from the Nanushuk Group, having abundant quartz-overgrowth development. Sample 78ACh25, Marmot syncline. Quartz cement migrated from the monocrystalline quartz grain into the adjacent polycrystalline quartz grain, which has been corroded. Polarized light. Magnification, 6.3 x 10, photomicrographs. Central North Slope, Alaska. Published as Figure 48D in U.S. Geological Survey. Bulletin 1614. 1985. #1:/Bulletin 1614/bws00019 ID. Bartsch-Winkler, S, 19 Secondary porosity in Nanushuk Group sandstones. Scanning electron microscope shows leaching, corrosion, and honeycombing of framework grains. Sample 78ACh769 Kurupa anticline; magnification, X143, SEM. Central North Slope, Alaska. Published as Figure 49A in U.S. Geological Survey, Bulletin 1614. 1985. #1:/Bulletin 1614/bws00020 ID. Bartsch-Winkler, S, 20 Secondary porosity in Nanushuk Group sandstones. Irregular surface on quartz-overgrowth crystal indicates possible dissolution of siliceous cement. Sample 78AChl75 Kurupa anticline; magnification, XI220, SEM. Central North Slope, Alaska, Published as Figure 49B in U.S. Geological Survey. Bulletin 1614. 1985. #1:/Bulletin 1614/bws00021 ID. Bartsch-Winkler, S, 21 Secondary porosity features in sandstone from the Nanushuk Group. Apparent partial dissolution of a rounded polycrystalline quartz grain creates secondary porosity in a highly compacted sandstone. Sample 78ACh72, Kurupa anticline; magnification, 6.3 x 10, photomicrograph. Central North Slope, Alaska. Published as Figure 50A in U.S. Geoloqical Survey. Bulletin 1614. 1985. #1:/Bulletin 1614/bws00022 ID. Bartsch-Winkler, S, 22 Secondary porosity features in sandstone from the Nanushuk Group. Abundant partial dissolution of grains results in elongate and oversize pores and floating grains. Sample 78ACh72, anticline; magnification, 6.3 x 10, photomicrograph. Central North Slope, Alaska. Published as Figure 50B in U.S. Geological Survey. Bulletin 1614. 1985. #1:/Bulletin 1614/bws00023 ID. Bartsch-Winkler, S, 23 Secondary porosity features in sandstone from the Nanushuk Group, Embayed grains give secondary pores rounded borders. Pores are oversize and may have resulted from complete dissolution of a framework grain or from dissolution of cement thaft replaced a framework grain. Sample 78ACh799 Kurupa anticline; magnification, 2.5 x 10, photomicrograph. Published as Figure 50C in U.S. Geological Survey. Bulletin 1614. 1985. #1:/Bulletin 1614/bws00024 ID. Bartsch-Winkler, S, 24 Possible presence of hydrocarbons (?) in Nanushuk Group rocks. Migration apparently occurred during or after compaction of the sandstones. Possible hydrocarbon (?) migration is facilitated along solution seams probably formed during compaction. Sample 78ACh34, Marmot syncline; magnification, 2.5 x 10, photomicrograph. Central North Slope, Alaska. Published as Figure 51A in U.S. Geological Survey. Bulletin 1614. 1985. #1:/Bulletin 1614/bws00025 ID. Bartsch-Winkler, S, 25 Possible presence of hydrocarbons (?) in Nanushuk Grpup rocks. Migration apparently occurred during or after compaction of the sandstones. Possible hydrocarbon (?) migration into intergranular pore spaces and into a grain cracked by compaction. Dissolution pore (P) unfilled by hydrocarbon indicates that migration may have occurred prior to creation of dissolution porosity. Sample 78ACh25, Marmot syncline; magnification, 2.5 x 10, photomicrograph. Central North Slope, Alaska. Published as Figure 51B in U.S. Geoloqical Survey. Bulletin 1614. 1985. #1:/Circular 1022/bws00026 ID. Bartsch-Winkler, S, 26 Undular bore and whelps near the mouth of Araguari River, Brazil. View is oblique toward toward mouth from airplane at approximately 100 ft. altitude. n.d. Portion published as Figure 5 in U. S. Geological Survey. Circular 1022. 1988. #1:/Circular 1022/bws00027 ID. Bartsch-Winkler, S, 27(1ct) Tidal bore of about 1.5m amplitude: marks low tide in Turnagain Arm, Cook Inlet Region, Alaska. The bore is moving from right to left, followed by the flood tide. n.d. Cook Inlet Region, Alaska. Portion published as Figure 1, in U.S. Geological Survey, Circular 1022. 1988. #1:/Circular 1022/bws00028 ID. Bartsch-Winkler, S, 28(2ct) Complex wavefront of the Turnagain Arm bore. The bore is moving from right to left and is followed by flood tide. Photograph taken from airplane at approximately 100 ft. altitude, n.d. Cook Inlet Region, Alaska. Portion published as Figure 6 in U.S. Geological Survey, Circular 1022. 1988. #1:/Washington-Professional paper 202/crs00006 ID. Cannon, S.R. 6 Pend Oreille mine and mill, view west from Grandview workings. Pend Oreille County, Washington. 1937. Plate 32, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/crs00009 ID. Cannon, S.R. 9 Post-Pleistocene gorge of the Pend Oreille River, south from east bank of the river about ¼ mile southeast of Z Canyon, the river level is about 500 feet below the observer. Pend Oreille County, Washington. 1937. Plate 7, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/crs00010 ID. Cannon, S.R. 10 Cliff of poorly sorted Tertiary sedimentary beds, center of sec. 16, T. 36 N, R. 43 E. Pend Oreille County, Washington. 1937. Plate 11-A, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/crs00011 ID. Cannon, S.R. 11 Tertiary sedimentary debris, south center of sec. 16, T. 36 N., R. 43 E; pocket watch in lower center indicates scale. Pend Oreille County, Washington. 1937. Plate 11-B, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/crs00012 ID. Cannon, S.R. 12 Stream terraces on upper Ruby Creek Pend Oreille County, Washington. 1937. Plate 15- B, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/crs00018 ID. Cannon, S.R. 18 Maitlen phyllite: bedding nearly horizontal, shearing banding nearly vertical; northwest corner of sec. 35, T. 39 N., R. 42 E. Pend Oreille County, Washington. 1937. Plate 6-C, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/crs00034 ID. Cannon, S.R. 34 Rhombohedral fragments, in Shedroof conglomerate formed by the shearing of a band of quartzite, SE ¼ sec. 24, T. 40 N. R. 45 E. #1:/Washington-Professional paper 202/crs00037 ID. Cannon, S.R. 37 Sandy bed in Shedroof conglomerate showing shear planes cutting bedding at angle of about 30 degrees; Trail Forks, southeast corner of sec. 24, T. 40 N. R. 45 E. Pend Oreille County, Washington. 1937. Plate 3-A, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/crs00042 ID. Cannon, S.R. 42 Bedding in transition zone between Shedroof conglomerate and Leola volcanics; peak at altitude of 6,000 feet in north center of sec. 25, T. 40 N., R. 45 E. Pend Oreille County, Washington. 1937. Plate 3-B, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/crs00045 ID. Cannon, S.R. 45 Shedroof conglomerate on southeast slope of Round Top Mountain: Surface showing normal to maximum elongation of fragments, same outcrop as photo 46. Pend Oreille County, Washington. 1937. Plate 4-B, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/crs00046 ID. Cannon, S.R. 46 Shedroof conglomerate on southeast slope of Round Top Mountain: Surface showing maximum elongation of fragments. Pend Oreille County, Washington. 1937. Plate 4-A, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/crs00047 ID. Cannon, S.R. 47 Glacial blockade at north end of Sullivan Lake, viewed from slope of Sullivan Mountain. Pend Oreille County, Washington. 1937. Plate 16-B, U.S.Geological Survey Professional Paper 202. 1943. #1:/Washington-Professional paper 202/crs00052 ID. Cannon, S.R. 52 Calcite and dolomite, the calcite shows large rhombohedral cleavage surfaces and in general is lighter than the dolomite, Lead Hill mine. Pend Oreille County, Washington. 1937. Plate 24-A, U.S.Geological Survey Professional Paper 202. 1943. #1:/Bulletin 1000-D/chl00001 ID. Cannon, H.L. 1 Sphalerite-bearing Stromatopora in Lock-port dolomite southeast of Clarendon. Orleans County, New York. April, 1948. Published as plate 4 (left photo) in U. S, Geological Survey. Bulletin 1000-D. 1955. #1:/Bulletin 1000-D/chl00002 ID. Cannon, H.L. 2 Sphalerite-bearing Stromatopora in Lock-port dolomite southeast of Clarendon. Orleans County, New York. April 1948. Published as plate 4 (right photo) in U. S, Geological Survey. Bulletin 1000-D. 1955. #1:/Bulletin 1000-D/chl00003 ID. Cannon, H.L. 3 Polished section of Stromatopora containing sphalerite. Vertical lighting. Orleans County, New York, 1949. (Specimen). (Photo by U. S, Geological Survey Photographic Laboratory). Published as plate 5 (left photo) in U.S. Geological Survey. Bulletin 1000-D. 1955. #1:/New York/chl0003c ID. Cannon, H.L. 3ct New York. Drainage ditch in Orleans County, showing second peat layer in the marl. June 1947. #1:/Bulletin 1000-D/chl00004 ID. Cannon, H.L. 4 Polished section of Stromatopora containing sphalerite. Inclined lighting. ZnS appears as light areas. Orleans County, New York, 1949. (Specimen). (Photo by U. S, Geological Survey Photographic Laboratory). Published as plate 5 (left photo) in U.S. Geological Survey. Bulletin 1000-D. 1955. #1:/Bulletin 1000-D/chl00005 ID. Cannon, H.L. 5 Polished section of Stromatopora showing ZnS as light areas under inclined lighting. Shelby. Orleans County, New York. 1949. (Specimen). (Photo by U. S. Geological Survey Photographic Laboratory). Published as plate 6-A in U. S. Geological Survey. Bulletin 1000-D. 1955. #1:/Cannon Collection/chl0005a ID. Cannon, H.L. 5a Polished section of Stromatopora showing ZnS as light areas under vertical lighting. Shelby. Orleans County, New York. 1949. (Specimen). (Photo by U. S. Geological Survey Photographic Laboratory). #1:/Bulletin 1000-D/chl00006 ID. Cannon, H.L. 6 Strornatopora in Zone 1 boulder of Lockport dolomite southeast of Clarendon. Orleans County, New York. April 1948. (Specimen). Published as plate 6-B in U. S. Geological Survey. Bulletin 1000-D. 1955. #1:/Cannon Collection/chl0006a ID. Cannon, H.L. 6a Stromatopora in Zone 1 boulder of Lockport dolomite southeast of Clarendon. Orleans County, New York. April 1948. (Specimen). #1:/Cannon Collection/chl00007 ID. Cannon, H.L. 7 Polished section of sphalerite-galena intergrowth enlarged four times. New York. 1949. (Specimen). (Photo by U. S. Geological Survey Photographic Laboratory). #1:/Cannon Collection/chl00008 ID. Cannon, H.L. 8 Cannon, H, L. 8 (1ct) Weathering boulder of Lockport dolomite showing pitted surface. New York. June, 1947. #1:/Cannon Collection/chl00009 ID. Cannon, H.L. 9 Algae reef in Lockport dolomite exposed in Penfield quarry, Rochester. Monroe County, New York. October 1947. #1:/Cannon Collection/chl00010 ID. Cannon, H.L. 10(2ct) Looking north onto Manning Muck showing till-muck boundary. Orleans County, New York. June 1947. #1:/Cannon Collection/chl00011 ID. Cannon, H.L. 11 Crops grown on the Muck with willow windbreaks along drainage ditches. New York. June, 1947. #1:/Cannon Collection/chl00012 ID. Cannon, H.L. 12 Drainage ditch showing second peat layer in the marl. Manning. Orleans County, New York. June 1947. #1:/Cannon Collection/chl00013 ID. Cannon, H.L. 13 Drainage ditch showing yellowing of vegetation due to Zn. Manning. Orleans County, New York. April 1947. #1:/Cannon Collection/chl00016 ID. Cannon, H.L. 16 Undrained swamps south of Albion. Zn-bearing. Orleans County, New York. May 1947. #1:/Bulletin 1000-D/chl00017 ID. Cannon, H.L. 17 Dead Astragalus pattersoni plant useful in fall and winter in deciding where to drill. Colorado Plateau. 1952. Published as figure 74 in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1000-D/chl00018 ID. Cannon, H.L. 18 Astragalus pattersoni (Patterson poisonvetch). Colorado Plateau, n.d. Published as figure 77 in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1000-D/chl0018a ID. Cannon, H.L. 18a Published as figure 76 in U.S. Geological Survey. Bulletin 1030-M. 1957.> FIGURE 76. Astragalus pattersoni A. Gray. Family : Pea, Legurninosae. Subgenus: Jonesiella Flowers : Cream-colored irregular flowers with purple clot on keel, growing in tall clusters which extend beyond the foliage. Blooms in April and May. Leaves : Pinnate with numerous oval leaflets. Fruit : Fat pods mounted on short stem. Seeds rattle in pod when dry (then called rattleweed). Root : Very long taproot, commonly 30 feet or more in length. Plant : Perennial, 1-4 feet high. Garliclike odor common to foliage owing to presence of selenium. #1:/Cannon Collection/chl00019 ID. Cannon, H.L. 19 Astragalus pattersoni (Patterson poisonveteh). Picked flower stalk. Colorado Plateau. May 1949. #1:/Cannon Collection/chl00020 ID. Cannon, H.L. 20 Astragalus pattersoni (Patterson poisomretch). Growing specimen showing both flowers and seed pods. Colorado Plateau. April 1952. #1:/Bulletin 1030-M/chl00021 ID. Cannon, H.L. 21 Astragalus preussi (Preuss poisoivetch). Colorado Plateau, n.d. Published as figure 79 in U.S. Geological Survey. Bulletin 1030-M. 1957; plate 4 (lower photo) in U.S. Geological Survey. Bulletin 1085-A. 1960. #1:/Bulletin 1030-M/chl0021a ID. Cannon, H.L. 21a Published as figure 78 in U.S. Geological Survey. Bulletin 1030-M. 1957.> FIGURE 78. Astragalus preussi A. Gray. Family : Pea, Leguminosae. Subgenus : Jonesiella. Flowers : Purple irregular flowers with darker calyx, arising from creeping root stalks. Blooms in April and May. Leaves : Smooth pinnate with 11-15 elliptic leaflets. Fruit : Fat smooth oblong pod slightly curved, with short stem. Plant : Perennial. Many stems less than a foot high arising from a woody base. Garliclike odor of foliage is due to presence of selenium. #1:/Cannon Collection/chl00022 ID. Cannon, H.L. 22 Astragalus preussi (Preuss poisonvetch). Colorado Plateau, April 1951. #1:/Bulletin 1030-M/chl00023 ID. Cannon, H.L. 23(3cp) Astragalus thompsonae (Thompson loco). In flower. Colorado Plateau. May 1952. Published as figure 81 (upper photo) in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl0023a ID. Cannon, H.L. 23a Published as figure 80 in U.S. Geological Survey. Bulletin 1030-M. 1957.> FIGURE 80. Astragalus thompsonae S. Wats. Family : Pea, Leguminosae. Subgenus: Euastragalus. Flowers : Very showy, pinkish-lavender irregular flowers in clusters on long stems. Blooms in April and May. Leaves : Leaves all basal, pinnate, with 10 or more pairs of ovate leaflets which become progressively smaller toward apex. Hairy, but hairs not alined in any particular direction; spreading. Fruit : Fat, erect, two-celled, slightly curved, hairy pods with thick walls which become woody. No stem. Plant : Rosette type of perennial 6-12 inches across, with all leaves basal. Plant and pods covered with soft, silvery hairs. #1:/Bulletin 1030-M/chl00024 ID. Cannon, H.L. 24 Astragalus thompsonae (Thompson loco). Seed pods. Colorado Plateau. June 1952. Published as figure 81 (lower photo) in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Cannon Collection/chl00025 ID. Cannon, H.L. 25(4cp) Astragalus thompsonae. Showing flowers and seed pods. Colorado Plateau. May 1949. #1:/Bulletin 1030-M/chl00026 ID. Cannon, H.L. 26 Astragalus confertiflorus (Blue poisonvetch). In flower. Colorado Plateau. April 1950. Published as figure 83 in U.S. Geological Survey. Bulletin 1030-M. 1957; plate 5 (lower photo) in U. S. Geological Survey. Bulletin 1085-A. 1960. #1:/Bulletin 1030-M/chl0026a ID. Cannon, H.L. 26a Published as figure 82 in U.S. Geological Survey. Bulletin 1030-M. 1957.> FIGURE 82. Astragalus confertiflorus A. Gray. Family : Pea, Leguminosae. Subgenus: Cnemidophacos. Flowers : Cream-colored, irregular flowers in dense inflorescence. Blooms in May. Leaves : Pinnate, with 11 to 15 linear leaflets. Silvery hairs. Fruit : Erect one-celled pod from stalk, not inflated, and with no individual stem. Woody. Plant : Perennial; about 8 inches; has erect stems and bluish foilage. #1:/Cannon Collection/chl00027 ID. Cannon, H.L. 27 Astragalus confertiflorus (Blue poisonvetch). In flower. Colorado Plateau. April 1952. #1:/Bulletin 1030-M/chl00028 ID. Cannon, H.L. 28 Astragalus bisulcatus (Two-grooved poisonvetch), Colorado Plateau. June 1955. Published as figure 85 in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl0028a ID. Cannon, H.L. 28a Published as figure 84 in U.S. Geological Survey, Bulletin 1030-M. 1957.> FIGURE 84. Astragalus bisulcatus (Hook.) A. Gray. Family : Pea, Leguminosae. Subgenus: Diholcos. Flowers : Beep purple, irregular flowers in dense elongated spikelike inflorescence which extends above the foilage. Blooms in June and July. Leaves : Smooth pinnate with oval or oblong leaflets. Fruit : Linear one-celled pod with two deep grooves on the upper side. Pod with stem extends from calyx. Plant : Stout, erect. Perennial. #1:/Bulletin 1030-M/chl00029 ID. Cannon, H.L. 29 Astragalus missouriensis (Missouri milkvetch). In flower and seed. Colorado Plateau. May 1955. Published as figure 87 in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl0029a ID. Cannon, H.L. 29a Published as figure 86 in U.S. Geological Survey. Bulletin 1030-M. 1957.> FIGURE 86. Astragalus missouriensis Nutt. Family : Pea, Leguminosae. Subgenus: Xylophacos. Flowers : Irregular, large, rose-purple pealike flowers in open cluster. Blooms in May. Leaves : Pinnate, with 9-15 broad leaflets. Hairs oppressed, not spreading, some pick-shaped or attached below the middle. Fruit : Pods 1 inch, 4-angled, 1-celled, beaked, curved slightly upward, and woody. No stem. Plant : Low perennial, with basal rosetted leaves and large flowers on many erect flowering stems. #1:/Bulletin 1030-M/chl00030 ID. Cannon, H.L. 30 Astragalus lonchocarpus (Long-seeded milkvetch). In flower. Colorado Plateau. June 1952. Published as figure 89 in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl0030a ID. Cannon, H.L. 30a Published as figure 88 in U.S. Geological Survey. Bulletin 1030-M. 1957.> FIGURE 88. Astragalus lonchocarpus Torr. Family : Pea, Leguminosae. Subgenus: Lonchophiaca. Flowers : Irregular creamy white, pea-shaped flowers, 1/2 to 3/4 inch long, elongate spreading clusters. Blooms in June. Leaves : Pinnate with three to nine linear or threadlike leaflets. Terminal leaflet much longer than the others. Fruit : Linear pod with long stem exceeding calyx, tapering at both ends 1 and 1/2 inches long. Thin, 1-celled, dorsally flattened, with prominent sutures. Pods pendulous. Plant : Tall rushlike perennials with 1-2 foot stems arising from woody base. #1:/Cannon Collection/chl00031 ID. Cannon, H.L. 31 Astragalus lonchocarpus (Long-seeded milkveteh). In flower. Colorado Plateau. June 1952. #1:/Bulletin 1030-M/chl00032 ID. Cannon, H.L. 32 Astragalus dodgeanus (Dodge milkveteh). Colorado Plateau. June 1952. Published as figure 91 in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl0032a ID. Cannon, H.L. 32a Published as figure 90 in U.S. Geological Survey. Bulletin 1030-M. 1957.> FIGURE 90. Astragalus dodgianus Jones. Family : Pea, Leguminosae. Subgenus: Honialobus. Flowers : Irregular, white, pealike flowers with purple-tipped keel. 1/3 inch Black hairs on calyx which has triangular teeth. Blooms in May. Leaves : Odd pinnate with 9 to 11 linear leaflets 1/3 inch long. Fruit : Linear pod 1-celled with short stem. Flattened, with both sutures prominent and lower suture straight. Plant : Sparingly hairy perennial with slender lax stems and woody root stalk. #1:/Cannon Collection/chl00033 ID. Cannon, H.L. 33 Astragalus dodgeanus (Dodge milkvetch). Colorado Plateau. June 1952. #1:/Bulletin 1030-M/chl00034 ID. Cannon, H.L. 34 Astragalus tenellus (Looseflower milkvetch). Colorado Plateau. July 1954. Published as figure 93 in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl0034a ID. Cannon, H.L. 34a Published as figure 92 in U.S. Geological Survey. Bulletin 1030-M. 1957.> FIGURE 92. Astragalus tenellus Pursh. Family : Pea, Leguruinosae. Subgenus: Homalobus. Flowers : Irregular, 1/4-inch cream to pale-lavender flowers with purple tip on keel generally hidden in the foliage. Blooms in June. Leaves : Pinnate with 7 to 21 linear smooth leaflets. Fruit : Pods 1-celled, 1/2 inch long, laterally flattened with both sutures prominent. Pods pendulous with short stem exceeding calyx. Plant : Perennial with woody root stalk. Stems 8 to 20 inches tall and leafy. Foliage blackens when dried. #1:/Cannon Collection/chl00035 ID. Cannon, H.L. 35 Astragalus tenellus (Looseflower milkvetch). Colorado Plateau. July 1954. #1:/Bulletin 1030-M/chl00036 ID. Cannon, H.L. 36 Astragalus aculeatus (Spiny milkvetch). Colorado Plateau. September 1955. Published as figure 95 in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl0036a ID. Cannon, H.L. 36a Published as figure 94 in U.S. Geological Survey. Bulletin 1030-M. 1957.> FIGURE 94. Astragalus aculeatus A. Nels. Family : Pea, Legnminosae. Subgenus: Kentrophyta. Flowers : Irregular, small purple pea-shaped flowers about 4 mm long, in axils of leaves, Blooms in July. Leaves : Pinnate, with 5 stiff spine-tipped leaflets 1/2 inch long. Fruit : Pods with 2 prominent sutures 1-celled, ovoid, 1/8 inch long. Plant : Perennial, with strong taproot, branches sprawling or erect, so densely covered with prickly leaves as to appear clublike. #1:/Cannon Collection/chl00037 ID. Cannon, H.L. 37 Astragalus racemosus. Colorado Plateau. June 1955. #1:/Cannon Collection/chl00038 ID. Cannon, H.L. 38 Astragalus pectinatus. Colorado Plateau. June 1955. #1:/Cannon Collection/chl00039 ID. Cannon, H.L. 39 Astragalus canadensis, Colorado Plateau. June 1949. #1:/Bulletin 1030-M/chl00040 ID. Cannon, H.L. 40 Cannon, H. L. 40 Allium acuminatum (Tapertip onion). Colorado Plateau. April 1955. Published as figure 97 in U. S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl0040a ID. Cannon, H.L. 40a Published as figure 96 in U.S. Geological Survey. Bulletin 1030-M. 1957.> FIGURE 96 Allium acuminatum Hook, and related species. Family : Lily, Liliaceae. Flowers: Umbrellalike cluster of small pink flowers at end of long stalk. Each petal has a middle line of deep pink. Blooms in April and May. Leaves : Two linear leaves about 6 inches long from bulb at base. Leaves are shorter than flower stem. Fruit : Three-lobed capsule. Plant : Spring ephemeral. Bulb with outer covering. Strong odor of crushed plant characteristic. #1:/Cannon Collection/chl00041 ID. Cannon, H.L. 41 Allium acuminatum (Tapertip onion). Colorado Plateau. April 1955. #1:/Cannon Collection/chl00042 ID. Cannon, H.L. 42 Allium cernuum (Nodding onion). Colorado Plateau. June 1954. #1:/Bulletin 1030-M/chl00043 ID. Cannon, H.L. 43 Calochortus nuttalli (Sego lily). Colorado Plateau. April 1953. Published as figure 99 in U.S. Geological Survey. 1957. #1:/Bulletin 1030-M/chl0043a ID. Cannon, H.L. 43a Published as figure 98 in U.S. Geological Survey. Bulletin 1030-M. 1957.> FIGURE 98. Calochortus nuttalli Torr. & Gr. Family : Lily, Liliaceae. Flowers: Three large white petals marked yellow and purple at base. Gland with hairs at base of petal. One to five flowers on stalk. Blooms in April and May. Leaves : Several alternate grasslike leaves about 6 inches long, trough-shaped in cross section. Onionlike bulb. Fruit : Three-angled capsule. Plant : Spring ephemeral. Grasslike leaves arising from bulb. #1:/Cannon Collection/chl00044 ID. Cannon, H.L. 44 Calochortus nuttalli (Sego lily). Colorado Plateau. April 1953. #1:/Bulletin 1030-M/chl00045 ID. Cannon, H.L. 45 Zigadenus gramineus (Glassy deathcamas). Colorado Plateau. April 1950. Published as figure 101 in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl0045a ID. Cannon, H.L. 45a Published as figure 100 in U.S. Geological Survey. Bulletin 1030-M. 1957.> FIGURE 100. Zigadenus gramineus Rydb. Family : Lily, Liliaceae. Flowers: Inconspicuous greenish-white flowers with 6 "petals" which grow in a raceme on flower stalk about 8 inches high. Gland near the base of the petal. Blooms in April. Leaves : Smooth, narrow, grasslike leaves arising from bulb. Fruit : Three-celled capsule. Plant : Spring ephemeral. Bulb with membranous covering. #1:/Cannon Collection/chl00046 ID. Cannon, H.L. 46(7cp) Zigadenus gramineus (Grassy deatheamas). Colorado Plateau, April 1950. #1:/Bulletin 1030-M/chl00047 ID. Cannon, H.L. 47 Stanleya pinnata (Desert princesplume). Colorado Plateau. August 1952. Published as figure 103 in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl0047a ID. Cannon, H.L. 47a Published as figure 102 in U.S. Geological Survey. Bulletin 1030-M. 1957.> FIGURE 102. Stanley a pinnata (Pursh) Britt. Family : Mustard, Cruciferae. Flowers: Golden yellow, with four clawed petals on tall stalk; through the summer months the stalks show a progression from buds to flowers to seeds. Stamens unequal, with anthers curled at maturity. Leaves : Pale green, alternate; variable in shape and size, often lyre-shaped or entire. Fruit : Long thin capsule containing many seeds. Plant : Coarse perennial with thick erect stalk, 1-3 feet high, and woody root. #1:/Cannon Collection/chl00048 ID. Cannon, H.L. 48 Stanleya pinnata (Desert princesplume). Single flower spike. Colorado Plateau. July 1953. #1:/Cannon Collection/chl00049 ID. Cannon, H.L. 49 Stanleya pinnata (Desert princesplume). Large plant advanced stage. Colorado Plateau. September 1953. #1:/Bulletin 1030-M/chl00050 ID. Cannon, H.L. 50 Lepidium montanum (Mountain pepperweed). Colorado Plateau. May 1950. Published as figure 105 in U.S. Geological Survey, Bulletin 1030-M, 1957. #1:/Bulletin 1030-M/chl0050a ID. Cannon, H.L. 50a Published as figure 104 in U.S. Geological Survey, Bulletin 1030-M. 1957.> FIGURE 104. Lepidium montanum Nutt. Family : Mustard, Cruciferae. Flowers: Dense cluster of white flowers. Four clawed petals one-fourth inch long which form a cross. Blooms from April to September. Leaves : Basal leaves finely divided, several inches long. Upper leaves simple and smooth edged; do not clasp the stem. Fruit : Small round disk-shaped capsules that are not inflated. Narrowly winged and obscurely notched at the apex. Plant : Bushy perennial 1 to 2 feet high. Stems not woody. Several stems from same root. #1:/Cannon Collection/chl00051 ID. Cannon, H.L. 51 Lepidium montanum (Mountain pepperweed). Colorado Plateau. May 1950. #1:/Bulletin 1030-M/chl00052 ID. Cannon, H.L. 52 Lepidium lasiocarpum (Hairy-pod pepperweed). Colorado Plateau. May 1952. Published as figure 107 in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl0052a ID. Cannon, H.L. 52a(28cp) Published as figure 106 in U.S. Geological Survey, Bulletin 1030-M. 1957.> FIGURE 106. Lepidium lasiocarpum Nutt. Family : Mustard, Cruciferae. Flowers: Not conspicuous, may be obsolete. Blooms from January to April. Leaves : Small simple rounded leaves. Basal leaves incised. Fruit : Notched round disk-shaped capsules. Plant : Tiny hairy annual, 2 inches high, branched from the base and not woody. #1:/Bulletin 1030-M/chl00053 ID. Cannon, H.L. 53 Sisymbrium altissimum (Tumble mustard). Colorado Plateau. June 1954. Published as figure 109 in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Cannon Collection/chl0053a ID. Cannon, H.L. 53a Sisymbrium altissimum (Tumble mustard). Colorado Plateau. June 1954. #1:/Bulletin 1030-M/chl0053b ID. Cannon, H.L. 53b Published as figure 108 in U.S. Geological Survey. Bulletin 1030-M. 1957.> FIGURE 108. Sisymftrium altissimum (L.) Britt. Family : Mustard, Cruciferae. Flowers: Four creamy, flat, one-fourth inch petals which form a cross. Blooms from May to July. Leaves : Upper leaves threadlike, lower leaves divided and not clasping the stem. Fruit : Thin linear capsules, more than 2 inches long. Divergent. Root : Tap root, but with fine long laterals; root system extensive. Plant : Coarse erect annual 2 to 4 feet high with smooth stems, freely branching. An introduced European adventive weed both tolerant and indicative of soils containing sulfate. #1:/Bulletin 1030-M/chl0054a ID. Cannon, H.L. 54a(27cp) Published as figure 110 in U.S. Geological Survey. Bulletin 1030-M. 1957.> FIGURE 110. Cryptantha flava A. Nels. and related species. Family : Borage, Boraginaceae. Flowers: Pale-yellow, tubular flowers one-fourth inch long in small congested, densely hairy heads. Blooms in spring and summer. Leaves : Rough, simple, linear, and mostly basal. Fruit : Smooth oval nutlet. Plant : Stout, pale-green, hairy perennial 4 to 12 inches high, growing from woody base. #1:/Bulletin 1030-M/chl00054 ID. Cannon, H.L. 54 Cryptantha flava (Cryptanth). Colorado Plateau, June 1954. Published as figure 111 in U. S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl00055 ID. Cannon, H.L. 55 Cannon, H, L. 55 Cryptantha flava. Colorado Plateau. n.d. #1:/Bulletin 1030-M/chl00056 ID. Cannon, H.L. 56 Oenothera caespitosa (Tufted evening-primrose). Colorado Plateau. May 1952. Published as figure 113 (upper photo) in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl00057 ID. Cannon, H.L. 57 Oenothera caespitosa (Tufted evening-primrose). Colorado Plateau. May 1952. Published as figure 113 (lower photo) in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl0057a ID. Cannon, H.L. 57a Published as figure 112 in U.S. Geological Survey. Bulletin 1030-M. 1957.> FIGURE 112. Oenothera caespitosa Nutt. Family : Primrose, Onagraceae. Flowers: Large fragrant white flower with 4 heart-shaped petals on a long slender calyx tube which rises directly from the ground for about 4 to 5 inches. Flowers open in the evening and turn pink with age. Fragrant. Blooms in May and June. Leaves : Strap leaves in a basal rosette. Smooth-margined or toothed, on winged stems. Fruit : Oval capsule with rounded tubercles on the angles. Plant : Perennial. #1:/Cannon Collection/chl00058 ID. Cannon, H.L. 58 Oenothera caespitosa (Tufted evening-primrose. Colorado Plateau. May 1952. #1:/Bulletin 1030-M/chl00059 ID. Cannon, H.L. 59 Oenothera pollida (Whitesteramed evening-primrose). Colorado Plateau. May 1953. Published as figure 115 in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl0059a ID. Cannon, H.L. 59a Published as figure 114 in U.S. Geological Survey. Bulletin 1030-M. 1957.> FIGURE 114. Oenothera albicaulis Pursh. Family : Primrose, Onagraceae. Flowers: Four large white lobes resembling petals at end of tube 1 inch long. Blooms from May to July. Leaves : Basal leaves, blunt, spatulate, toothed. Stem leaves, 2 to 5 inches long, deeply divided. Fruit : Pod, 1/2 to 2 inches long, 1/2 inch thick. Plant : Annual or biennial, 4 to 12 inches high, branched at the base. #1:/Cannon Collection/chl00060 ID. Cannon, H.L. 60 Oenothera pollida (Whitestemmed evening-primrose). Colorado Plateau. May 1953. #1:/Bulletin 1030-M/chl00061 ID. Cannon, H.L. 61 Eriogonum inflatum (Deserttrumpet eriogonum). Note 3 inflated stems. Colorado Plateau. June 1949. Published as figure 117 in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl0061a ID. Cannon, H.L. 61a Published as figure 116 in U. S. Geological Survey. Bulletin 1030-M. 1957.> FIGURE 116. Eriogonum inflatum Torr. Family : Buckwheat, Polygonaceae. Flowers: Clusters of 10 to 20 tiny yellow flowers on much-branched mass of fine stems. Blooms from March to July. Leaves : Rounded leaves in rosette at base of plant. Seeds : Three-angled dry seed. Plant : Bluish-green tubular stems with hollow, inflated, trumpetlike parts before divisions. Stem divides in threes, 1 to 2 feet high perennial, with woody base. #1:/Cannon Collection/chl00062 ID. Cannon, H.L. 62 Eriogonum inflatum (Deserttrumpet). Colorado Plateau. May 1952. #1:/Bulletin 1030-M/chl00063 ID. Cannon, H.L. 63 Eriogonum fusiforme (Deserttrumpet). One inflation only. Colorado Plateau. May 1952. Published as figure 119 in U.S. Geological Survey, Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl0063a ID. Cannon, H.L. 63a Published as figure 118 in U.S. Geological Survey. Bulletin 1030-M. 1957.> FIGURE 118. Eriogonum fusiforme Small. Family : Buckwheat, Polygonaceae. Flowers: Tiny white or yellowish flowers in diffusely branching inflorescence Blooms in June and July. Leaves : Basal, rounded or kidney-shaped in outline, scattered hairs. Stem : Inflated part above the middle of stem. Fruit : Dry, small, smooth. Plant : Annual, with flower stalk extending from basal rosette. #1:/Bulletin 1030-M/chl00064 ID. Cannon, H.L. 64 Eriogonum ovalifolium (Silver plant or cushion eriogonum). Colorado Plateau. June 1954. Published as figure 121 in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl0064a ID. Cannon, H.L. 64a Published as figure 120 in U.S. Geological Survey. Bulletin 1030-M. 1957.> FIGURE 120. Eriogonum ovalifolium Nutt. Family : Buckwheat, Polygonaceae. Flowers: Pale-yellow to pink; in headlike cluster on 4- to 6-inch stalk. Calyx yellowish with pinkish veins. Blooms from April to June. Leaves : Densely white-woolly; oval leaves at base of plant about one-half inch in size. Fruit : Dry, small. Plant : Hairy perennial with basal cushion of leaves and 10-inch flower stalks. Woody base. #1:/Bulletin 1030-M/chl00065 ID. Cannon, H.L. 65 Eriogonum umbellatum (Sulfur eriogonum). Colorado Plateau. June 1954. Published as figure 123 in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl0065a ID. Cannon, H.L. 65a Published as figure 122 in U.S. Geological Survey. Bulletin 1030-M. 1957.> FIGURE 122. Eriogonum umtellatum Torr. Family : Buckwheat, Polygonaceae. Flowers: Twenty to thirty sulfur-yellow flowers in heads held in simple umbrella-like cluster with leafy bracts at base. Individual flowers tubular with reflexed lobes and 9 stamens. Flower stalks stout, woolly, and 4 to 12 inches long. Blooms through summer. Leaves : Thick, oval-to-spatulate, 1/2 to 1 inch long, tapering to a stem. Green above, white-woolly underneath. Seeds : Sharply three-angled, dry seeds. Plant : Perennial with thick taproot. Branched woody base tufted with leaves at the nodes from which erect leafless flower stalks extend. #1:/Bulletin 1030-M/chl00066 ID. Cannon, H.L. 66 Elymus salina (Salina wildrye). Colorado Plateau, June 1950. Published as figure 125 (upper photo) in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl0067a ID. Cannon, H.L. 67a Published as figure 124 in U.S. Geological Survey. Bulletin 1030-M. 1957.> FIGURE 124. Elymus salina Jones. Family : Grass, Gramineae. Flowers: Dense spikes. Spikelets coming off in pairs from jointed axis. No awns. Blooms through summer. Leaves : Broad blades, rolled inward. Plant : Perennial grass with harsh foliage. Grows in thick clumps several feet high. #1:/Bulletin 1030-M/chl00067 ID. Cannon, H.L. 67 Elymus salina (Saline wildrye). Colorado Plateau. April 1952. Published as figure 125 in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Cannon Collection/chl00068 ID. Cannon, H.L. 68 Elymus salina (Saline wildrye). Colorado Plateau. June 1950. #1:/Bulletin 1030-M/chl00069 ID. Cannon, H.L. 69 Stipa comata (Needleand thread). Colorado Plateau. June 1950. Published as figure 127 in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl0069a ID. Cannon, H.L. 69a Published as figure 126 in U.S. Geological Survey. Bulletin 1030-M. 1957.> FIGURE 126. Stipa comata Trin. & Rupr. Family : Grass, Gramineae. Flowers: Loose head 5 to 10 inches long with tightly twisted threadlike awns 4 to 5 inches long resembling tails attached to the seeds. Tight twist in lower third only. Blooms in June and July. Leaves : Harsh, flat, inrolled. Plant : Deep-rooted perennial 1 to 2 feet high. #1:/Bulletin 1030-M/chl00070 ID. Cannon, H.L. 70 Oryzopsis hyiaenoides (Indian ricegrass). Colorado Plateau. April 1955. Published as figure 129 in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl0070a ID. Cannon, H.L. 70a Published as figure 128 in U.S. Geological Survey. Bulletin 1030-M. 1957.> FIGURE 128. Oryzopsis hymenoides (Roem. & Schult.) Rick. Family : Grass Gramineae. Flowers: Small dry flowers in open panicle with branches at right angles in zigzag pairs. Individual spikelets one-flowered. Blooms in June and July. Leaves : Inrolled, narrow. Seeds : Small, ricelike; edible. Plant : Extensive perennial grass 1 to 2 feet high, with deep fibrous roots. #1:/Bulletin 1030-M/chl00071 ID. Cannon, H.L. 71 Aster venustus (Noody aster). Colorado Plateau. April 1952. Published as figure 131 in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl0071a ID. Cannon, H.L. 71a Published as figure 130 in U.S. Geological Survey. Bulletin 1030-M. 1957.> FIGURE 130. Aster venustus Jones. Family : Sunflower, Compositae. Flowers: Composite flowers in 1-inch heads with long white ray flowers resembling daisies. Heads solitary on 8-20-inch flower stalks. Bracts nearly equal in length. White "petals" turn lavender on aging. Blooms in May and June. Leaves : Spatula-shaped, with callous point, hairy and alternate. One to two inches long. Seeds : Small silky seeds remain in dried heads through summer months. Plant : Woody perennial base and naked flower stalks; long taproot. Plant 6 to 18 inches high. #1:/Cannon Collection/chl00072 ID. Cannon, H.L. 72 Aster venustus (Woody aster). Colorado Plateau. April 1952. #1:/Cannon Collection/chl00073 ID. Cannon, H.L. 73 Aster venustus (Woody aster). Colorado Plateau. April 1952. #1:/Bulletin 1030-M/chl00074 ID. Cannon, H.L. 74 Townsendia incana (Hoary townsendia). Colorado Plateau. April 1956. Published as figure 133 in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl0074a ID. Cannon, H.L. 74a Published as figure 132 in U.S. Geological Survey. Bulletin 1030-M. 1957.> FIGURE 132. Townsendia incana Nutt. Family : Sunflower, Compositae. Flowers: Daisy-like composite with yellow disk flowers and one-half-inch white to pink ray flowers. Blooms in April and May. Leaves : Spatula-shaped, blunt hairy leaves 1 inch long arising from basal woody crown. Seeds : Small flattened dry seeds. Plant : Hairy perennial with woody crown and flower stems less than 4 inches high. Taproot. #1:/Bulletin 1030-M/chl00075 ID. Cannon, H.L. 75 Aplopappus armeriodes (Goldenweed). Colorado Plateau. May 1950. Published as figure 135 in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl0075a ID. Cannon, H.L. 75a Published as figure 134 in U.S. Geological Survey. Bulletin 1030-M. 1957.> FIGURE 134. Aplopappus armeriodes A. Gray. Family : Sunflower, Conipositae. Flowers: Heads clustered at top of stem with yellow tubular disk and one-half-inch long ray flowers. Blooms in June and July. Leaves: Smooth, 3-nerved, linear leaves, 1 to 3 inches long. Plant : Perennial herb with leafless flower stems 2 to 6 inches long arising from bunched leaves at woody base. #1:/Bulletin 1030-M/chl00076 ID. Cannon, H.L. 76 Aplopappus armeriodes (Goldenweed). In bud. Colorado Plateau. May 1950. #1:/Bulletin 1030-M/chl00077 ID. Cannon, H.L. 77 Grindelia squarrosa (Curlycup gumweed). Colorado Plateau. June 1953.. Published as figure 137 (upper photo) in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl0078a ID. Cannon, H.L. 78a Published as figure 136 in U.S. Geological Survey. Bulletin 1030-M. 1957.> FIGURE 136. Grindelia squarrosa (Pursh) Dunal, and closely related species. Family : Sunflower, Cornpositae. Flowers: Yellow radiate heads in flat-topped clusters. Green bracts of heads strongly graduated in 4 to 8 rows with recurved tips and mucilaginous. Blooms in fall. Leaves : Undivided, alternate leaves clasping the stem ; resinous and stiff. Seeds : Dry, small, and short. Plant : Biennial or perennial, 8 to 40 inches high; mucilaginous plant with long taproot. Balsamlike odor from exuded gum. #1:/Bulletin 1030-M/chl00078 ID. Cannon, H.L. 78 Grindelia squarrosa (Curleycup guraweed). Colorado Plateau, June 1953. Published as figure 137 (lower photo) in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl00079 ID. Cannon, H.L. 79 Senecio longilobus (Threadleaf groundsel). Colorado Plateau. June 1953. Published as figure 139 in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl0079a ID. Cannon, H.L. 79a Published as figure 138 in U.S. Geological Survey. Bulletin 1030-M. 1957.> FIGURE 138. Scnecio longilobus Benth. Family : Sunflower, Compositae. Flowers: Yellow composite with 1/2 inch disk and long yellow ray flowers. Heads in flat-topped clusters. Blooms through summer months. Leaves : Pinnate leaves with linear, threadlike, hairy leaflets. Seeds : Small dry seeds. Plant : Ill-scented perennial 1 to 2 feet high covered with white-woolly hairs and having a long taproot. The plant is very poisonous to cattle. Poison, alkaloid. #1:/Cannon Collection/chl00080 ID. Cannon, H.L. 80 Senecio longilobus (Threadleaf groundsel). Closeup. Colorado Plateau. June 1953. #1:/Bulletin 1030-M/chl00081 ID. Cannon, H.L. 81 Euphorbia fendleri (Sandmat). Colorado Plateau. May 1954. Published as figure 141 in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl0081a ID. Cannon, H.L. 81a Published as figure 140 in U.S. Geological Survey. Bulletin 1030-M. 1957.> FIGURE 140. Euphorbia fendleri Torr. & Gr., and related prostrate species. Family : Spurge. Euphorbiaceae. Flowers: Minute flowers in peculiar "petaled" involucre from wbich stalked glands extend. Flowers occur in axils of leaves. Bloom from April to October. Leaves : Oval, opposite, entire, pale-green leaves 1/8 inch long. Fruit : Quadrangular seeds in lobed smooth capsule. Plant : Prostrate, pale-green annual with forking stems radially branched at the base. Milky acrid sap which is poisonous and may cause dermatitis upon contact. #1:/Bulletin 1030-M/chl0083a ID. Cannon, H.L. 83a Published as figure 142 in U.S. Geological Survey. Bulletin 1030-M. 1957.> FIGURE 142. Mentzelia multiflora (Nutt.) A. Gray. Several other species are similar appearance. Family : Loasa, Loasaceae. Flowers: Light-yellow, star-shaped flowers with 10 petals and many stamens. Stamens in outer row are petallike. Opens in afternoon. Blooms from May to August. Leaves : Light green, sticky, alternate, and toothed. Fruit : Three- to five-valved capsule. Plant : Stems freely branching; plant 1 to 3 feet high. Barbed stinging hairs. Perennial. Stout taproot. #1:/Bulletin 1030-M/chl00082 ID. Cannon, H.L. 82 Mentzelia multiflora (Desert blazingstar). Colorado Plateau. May 1954. Published as figure 143 (upper photo) in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl00083 ID. Cannon, H.L. 83 Mentzelia multiflora (Desert blazingstar). Colorado Plateau. May 1954. Published as figure 143 (lower photo) in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Cannon Collection/chl00084 ID. Cannon, H.L. 84 Mentzelia multiflora (Desert blazingstar), Colorado Plateau. May 1954. #1:/Bulletin 1030-M/chl0085a ID. Cannon, H.L. 85a(29cp) Published as figure 144 in U.S. Geological Survey. Bulletin 1030-M. 1957.> FIGURE 144. Solidago petradoria Blake. Family : Sunflower, Compositae. Flowers: Five to eight small yellow flowers in heads in dense flat-topped clusters. Blooms in July and August. Leaves : Linear-oblong, three-nerved, rigid alternate leaves, 2 to 4 inches long and resinous. Seeds : Dry, flat, five-nerved. Plant : Low, tufted, perrenial herbs with short branched woody base. Smooth, 4 to 6 inches long, erect flower stems from cushion of basal leaves. Extensive root system. #1:/Bulletin 1030-M/chl00085 ID. Cannon, H.L. 85 Solidago petradoria (Rock goldenrod). Colorado Plateau. June 1952. Published as figure 145 in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl00086 ID. Cannon, H.L. 86 Tetradymia spinosa (Cottonthorn horsebrush). Colorado Plateau. June 1952. Published as figure 147 in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl0086a ID. Cannon, H.L. 86a Published as figure 146 in U.S. Geological Survey. Bulletin 1030-M. 1957.> FIGURE 146. Tetradymia spinosa Hook. & Arn. Family : Sunflower, Compositae. Flowers: Fleshy smooth heads of four yellow flowers 1/2 to 3/4 inch long arising from axils of the leaves. Bracts at base of heads woolly. Blooms from May to July. Leaves : Primary leaves converted to woolly recurved spines 1/4 to 1/2 inch long. Secondary leaves linear, 1/4 to 1/2 inch long, fleshy and in clusters. Plant : Divaricately branched xerophytic shrub 2 to 4 feet high with white woolly branches and characteristic recurved woolly spines which are soft and pliant when first produced. High potassium content in leaves and buds. Organic compound in plant poisonous to sheep. #1:/Cannon Collection/chl00087 ID. Cannon, H.L. 87 Tetradymia spinosa (Cottonthorn horsebrush). Colorado Plateau. June 1952. #1:/Bulletin 1030-M/chl00088 ID. Cannon, H.L. 88 Cowania stansburiana (Stansbury eliffrose). In fruit. Colorado Plateau. August 1950. Published as figure 149 (upper photo) in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl00089 ID. Cannon, H.L. 89 Cowania stansburiana (Stansbury cliffrose). In flower. Colorado Plateau. June 1949. Published as figure 149 (lower photo) in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl0089a ID. Cannon, H.L. 89a Published as figure 148 in U. S. Geological Survey. Bulletin 1030-M. 1957.> FIGURE 148. Cowania stanshuriana Torr. Family : Rose, Rosaceae. Flowers: Creamy yellow solitary flowers with 5 oval petals, 5 sepals, and many stamens. Fragrant; resembles the wild rose. Flowers through spring and summer whenever water is plentiful. Leaves : Alternate gland-dotted, evergreen leaves with 3 to 5 lobes and curled under margins. White fuzz underneath. Seeds : Dry, attached to several long plumes which appear from each flower before the petals have dropped. Plant : Twisted shrub, 3 to 12 feet high with shaggy gray bark and reddish twigs. Plant has a bitter taste and very acid cell sap. #1:/Cannon Collection/chl00090 ID. Cannon, H.L. 90 Cowania stansburiana (Stansbury cliffrose). Entire shrub. Colorado Plateau. August 1950. #1:/Bulletin 1030-M/chl00091 ID. Cannon, H.L. 91 Cowania stansburiana (Stansbury cliffrose). Closeup of flowers. Colorado Plateau. June 1949. #1:/Bulletin 1030-M/chl00092 ID. Cannon, H.L. 92 Purshia tridentata (Antelope bitterbrush). Colorado Plateau. June 1950. Published as figure 151 in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl0092a ID. Cannon, H.L. 92 Published as figure 150 in U.S. Geological Survey. Bulletin 1030-M. 1957.> FIGURE 150. Pursliia tridentata (Pursh) DC. Family : Hose, Rosaceae. Flowers: Solitary at the ends of branches. Tube-shaped, hairy, five-lobed calyx, five yellow petals. Many stamens in single series. Blooms from April to July. Leaves: Alternate but crowded into fascicles. Three-cleft, 0.2 to 1 inch long, wedge-shaped with rolled margins. White fuzz beneath. Seeds : Spindle-shaped, 1/2 inch long, exserted from calyx tube with persistent break. Plant : Intricately branched shrubs 1 1/2 to 9 feet high with brown to gray bark. Drought resistant. Foliage has bitter taste. #1:/Bulletin 1030-M/chl00093 ID. Cannon, H.L. 93 Purshia tridentata (Antelope bitterbrush). Colorado Plateau. June 1950, #1:/Bulletin 1030-M/chl0094a ID. Cannon, H.L. 94a Published as figure 152 in U.S. Geological Survey. Bulletin 1030-M. 1957.> FIGURE 152. Hedysarum bereale Nutt. Family : Pea, Leguminosae. Flowers: Showy rose-purple irregular flowers in loose racemes which grow from the axils of leaves. Stamens 9 and 1. Blooms in June and July. Leaves : Odd-pinnate with many oblong leaflets. Finely punctate, smooth on upper surface and sparingly hairy beneath. Fruit : Compressed, several-jointed pod divided into 2 to 4 separable rounded segments. Plant: Perennial herb with 1 to 3 foot erect, leafy stems with scattered hairs. Resembles the Astragalus genus closely in general appearance except for seeds and hairy roughness. #1:/Bulletin 1030-M/chl00094 ID. Cannon, H.L. 94 Hedysarum boreale (Northern sweetvetch)l Colorado Plateau. June 1953. Published as figure 153 in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl00095 ID. Cannon, H.L. 95 Castilleja Integra (Indian paintbrush). Colorado Plateau. April 1953. Published as figure 155 in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl0095a ID. Cannon, H.L. 95a Published as figure 154 in U.S. Geological Survey. Bulletin 1030-M. 1957.> FIGURE 154. Castitteja Integra Gray. Family : Figwort. Scrophulariaceae. Flowers: Spikes of flowers consisting of three-cleft, brilliant scarlet bracts surrounding yellowish fused calyx and narrow yellow petals. Four stamens. Blooms throughout summer. Leaves : Alternate, sessile, linear leaves, 2 to 4 inches long. Fruit : Two-celled capsule containing many seeds. Plant : Erect perennial herb with simple leafy stem and spike of red or yellow bracted flowers. Roots fibrous, partly parasitic on other plants. #1:/Bulletin 1030-M/chl00096 ID. Cannon, H.L. 96 Plantago purshi (Woolly Indianwheat). Colorado Plateau. May 1952. Published as figure 156 in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl00097 ID. Cannon, H.L. 97 Plantago purshi (Woolly Indianwheat). Colorado Plateau. May 1952. Published as figure 157 in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl0098a ID. Cannon, H.L. 98a Published as figure 158 in U.S. Geological Survey. Bulletin 1030-M. 1957.> FIGURE 158. Atriplex confertifolia (Torr.) S. Wats. Family : Goosefoot, Chenopodiaceae. Flowers: Small dense clusters. Blooms in late summer. Leaves : Thickened, ovate, scurfy leaves; resembling a shad scale. Leaves have short stem. Fruit : Fruit in large conspicuous yellowish-green to pinkish bracts at ends of the branches. Bracts never with wings. Plant : Grayish-green xerophyte shrub 1-4 feet high; woody and branched. Branches ending in spines. Seeds not produced on same plants with pollen. #1:/Bulletin 1030-M/chl0099a ID. Cannon, H.L. 99a Published as figure 160 in U.S. Geological Survey. Bulletin 1030-M. 1957.> FIGURE 160. Atriplex canescens (Pursh) Nutt. Family : Goosefoot, Chenopodiaceae. Flowers: Staminate flowers small glomerules In dense spikes. Pistillate flowers enclosed in bracts with no calyx or petals. Blooms in June and August. Leaves : Linear, thick, grayish, scurfy. 2 inches long. No leaf stem. Fruits : Fruits one seeded with four prominent wings. Fruiting bracts stalked, thick, fleshy arid ovoid. Plant : Woody perennial 2-8 feet with male and female flowers on separate plants. Branches circular in cross sections, white scurfy. Bark peels from old stems in thin layers. Roots reach 20 feet in length. #1:/Cannon Collection/chl00100 ID. Cannon, H.L. 100 Atriplex canescens (Fourwing saltbush). Colorado Plateau. June 1955. #1:/Cannon Collection/chl00101 ID. Cannon, H.L. 101 Atriplex caneseens (Fourwing saltbush). Colorado Plateau. June 1955. #1:/Bulletin 1030-M/chl00102 ID. Cannon, H.L. 102 Sarcobatus vermiculatus (Black greasewood). Colorado Plateau, August 1952. Published as figure 163 in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl0102a ID. Cannon, H.L. 102a Published as figure 162 in U.S. Geological Survey. Bulletin 1030-M. 1957.> FIGURE 162. Sarcobatus vermiciilatus (Hook.) Torr. Family : Goosefoot, Chenopodiaceae. Flowers: Pollen and seeds not produced on same plant. Seed-producing flowers axillary and with cup-shaped enlarged calyx. Pollen-producing flowers small, in terminal spikes. Blooms from June to September. Leaves : Alternate, linear, and fleshy leaves, 1/2 - 1 1/2 inches long. Sessile. Seed : Nutlet attached to expanded, membranous calyx. Plant : Erect shrub 4-8 feet high, much branched and thorny with gray bark and fleshy linear leaves. #1:/Cannon Collection/chl00103 ID. Cannon, H.L. 103 Sarcobatus vermiculatus (Black greasewood). Colorado Plateau. August 1952. #1:/Bulletin 1030-M/chl00104 ID. Cannon, H.L. 104 Ephedra viridis (Jointfir, or Mormon tea). Colorado Plateau. May 1953. Published as figure 165 in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl0104a ID. Cannon, H.L. 104a Published as figure 164 in U.S. Geological Survey. Bulletin 1030-M. 1957.> FIGURE 164. Ephedra sp. Family : Jointfir, Gneiaceae. Flowers: Small male and female yellow flowers in short catkins with persistent bracts. Stamens united, 2-lobed flower tube. Blooms in spring. Leaves : Scaielike in pairs or threes at stem joints. Seeds : Hard nutlets. Plant : Shrubs 6-25 inches high with rigid jointed striated branches resembling Equisetum and reduced leaves. Twigs opposite or clustered at stem joints. #1:/Bulletin 1030-M/chl00105 ID. Cannon, H.L. 105(19cp) Opuntia rhodantha (Red pricklypear). Colorado Plateau, June 1949. Published as figure 166 in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl00106 ID. Cannon, H.L. 106 Opuntia polyacantha Haw (Plains pricklypear). Colorado Plateau. June 1949. Published as figure 167 in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl00107 ID. Cannon, H.L. 107 Cannon, H. L. 107 Opuntia polyacantha Haw (Plains prieklypear). Colorado Plateau. May 1950. #1:/Bulletin 1030-M/chl00108 ID. Cannon, H.L. 108 Mirabilis multiflora (Colorado four-o'clock). Colorado Plateau, n.d. Published as figure 168 in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl00109 ID. Cannon, H.L. 109 Mirabilis multiflora (Colorado four-o'clock). Colorado Plateau, n.d. Published as figure 169 in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl00110 ID. Cannon, H.L. 110 Fraxinus anomala (Singleleaf ash). Colorado Plateau. May 1949. Published as figure 171 in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl0110a ID. Cannon, H.L. 110a Published as figure 170 in U.S. Geological Survey. Bulletin 1030-M. 1957.> FIGURE 170. Fraxinus anomala Torr. Family : Olive, Oleaceae. Flowers: Four-toothed, bell-shaped flowers. Blooms in April and May. Leaves : Simple, smooth, rounded leaves 1-2 Inches long occurring in threes. Fruits : Dry, winged, oblong one-seeded fruits 1/2 to 1 inch long. Plant : Small tree 5 to 15 feet high, with 4-angled twigs and thick simple leaves. Extensive root system. #1:/Bulletin 1030-M/chl00111 ID. Cannon, H.L. 111 Hymenopappus filifolius (Fineleaf hymenopappus). Colorado Plateau. May 1953. Published as figure 173 in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl0111a ID. Cannon, H.L. 111a FIGURE 172. Hymenopappus filfolius Hook. Family : Sunflower, Compositae. Flowers: Several heads of tubular yellow flowers with tubes longer than lobes. No ray flowers. Blooms in July and August. Bracts at base of head with yellowish tips. Leaves : Woolly basal leaves twice-divided into threadlike segments. Seeds : Small dry seeds with long silky hairs. Plant : Woolly perennial plants with leaves crowded at branching wroody base and 10 to 20-inch stalks. Published as figure 172 in U.S. Geological Survey. Bulletin 1030-M 1957.> #1:/Bulletin 1030-M/chl00112 ID. Cannon, H.L. 112 Actinea acaulis (Stemless actinea). Colorado Plateau. May 1950. Published as figure 175 in U.S. Geological Survey. Bulletin 1030-M. 1957. #1:/Bulletin 1030-M/chl0112a ID. Cannon, H.L. 112a Published as figure 174 in U.S. Geological Survey. Bulletin 1030-M. 1957.> FIGURE 174. Actinea acaulis (Pursh) Spreng. Family : Sunflower, Compositae. Flowers: Single composite head of yellow flowers on 8-inch leafless scape or flower stalk. Single series of ray flowers, 3-toothed, with orange veins. Bracts at base of flower in 2 or 3 rows, not united and densely hairy. Blooms from June to September. Leaves : Basal rosette of linear leaves. 1/2 to 2 inches with entire margins, silky. Glands prominent. Seeds : Dry, angled, hairy seeds crowned with 6 papery scales. Plant : Perennials with woody base and strong taproot. Single leafless flower stalk with leaf rosette. Bitter, aromatic taste. #1:/Bulletin 1030-M/chl00113 ID. Cannon, H.L. 113 Abromia fragrans var. elliptica Heimerl (Snowball sandverbena). Colorado Plateau, n.d. #1:/Bulletin 1030-M/chl00114 ID. Cannon, H.L. 114(25cp) Chlorotic leaf pattern developed in maple tree growing in copper-rich soil in Ely. Orange County, Vermont. August 27, 1947. Published as upper photograph in Science, v. 132, no. 3427, p. 593. September 2. 1960. #1:/Bulletin 1030-M/chl00115 ID. Cannon, H.L. 115(26cp) Eschscholtzia mexicana (California poppies) indicating copper mineralization that is bounded by a fault. San Manuel, Arizona. April 21, 1949. Published as lower photograph in Science, v. 132, no. 3427, p. 593. September 2, 1960. #1:/Bulletin 1085-A/chl00117 ID. Cannon, H.L. 117 Astragalus argillosus. Colorado Plateau. n.d. Published as plate 5 (upper photo) in U.S. Geological Survey. Bulletin 1085-A. 1960. #1:/Bulletin 1085-A/chl00118 ID. Cannon, H.L. 118 Astragalus pattersoni. Colorado Plateau, n.d. Published as plate 4 (upper photo) in U.S. Geological Survey. Bulletin 1085-A. 1960. #1:/Bulletin 1085-A/chl00119 ID. Cannon, H.L. 119 Astragalus pattersoni, selenium indicator, used successfully in uranium prospecting in Yellow Cat area. Utah. n.d. #1:/Bulletin 1085-A/chl00120 ID. Cannon, H.L. 120 Astragalus preussi. selenium indicator, used successfully in uranium prospecting in Yellow Cat area. Utah. n.d. #1:/Bulletin 1085-A/chl00121 ID. Cannon, H.L. 121 Allium acuminatum, sulfur concentrator, useful in prospecting shallow uranium deposits in Yellow Cat area. Utah. n.d. #1:/Bulletin 1030-M/chl00122 ID. Cannon, H.L. 122 Index map of part of the Colorado Plateau, showing location of mining districts. n.d. Published as figure 75 in U.S. Geological Survey, Bulletin 1030-M. 1957. #1:/Professional paper 918/chl00123 ID. Cannon, H.L. 123 Precipitate of biogenous origin occurring in place, Amargosa Desert, Sample from Station A5B. Inyo County, California - Nye County, Nevada. ca, 1965. Published as figure 4 in U.S, Geological Surrey. Professional paper 918, 1975. #1:/Professional paper 918/chl00124 ID. Cannon, H.L. 124 Calcium carbonate precipitate on organic detritus, Amargosa Desert. Sample from station A5. Inyo County, California - Nye County, Nevada. ca, 1965. Published as figure 5 in U.S, Geological Surrey. Professional paper 918, 1975. #1:/Henry Tourtelot Collection/tha00001 ID. Tourtelot, H. A. 1 Ackerman/Porters Creek contact; red, slightly cross-and above massive black pyritiferous clay at the contact, with Porters Creek clay, which is dark-gray with marked conchoidal fracture, and laminated sand and micaceous, glauconitic clay below. Looking northwest, 4 1/2 miles north of Ripley, SW1/4 sec. 26, T. 3 S., R. 3 E. Tippah County, Mississippi. November 11, 1942. #1:/Henry Tourtelot Collection/tha00002 ID. Tourtelot, H. A. 2 Close-up of photo no. 1. Ackerman/Porters Creek contact; red, slightly cross-bedded sand above massive black pyritiferous clay at the contact, with typical Porters Creek clay, which is dark-gray with marked conchoidal fracture, and laminated sand and micaceous, glauconitic clay below. Looking northwest, 4 1/2 miles north of Ripley, SW1/4 sec. 26, T. 3 S., R. 3 E. Tippah County, Mississippi. November 11, 1942. #1:/Henry Tourtelot Collection/tha00003 ID. Tourtelot, H. A. 3 Shelton cut, 6 miles northwest of Ripley; bauxite-kaolin sands with lenses of clay, below, and Ackerman laminated sand and clayey silts above. Looking north, 6 miles northwest of Ripley, SE1/4 sec. 29, T. 3 S., R. 3 E. Tippah County, Mississippi, November 17, 1942. #1:/Henry Tourtelot Collection/tha00004 ID. Tourtelot, H. A. 4 Fine-grained sands and clays of the bauxite-kaolin zone. Looking north, 6 miles northwest of Ripley, SE1/4 sec. 29, T. 3 S., R. 3 E. Tippah County, Mississippi. Noverber 17, 1942. #1:/Henry Tourtelot Collection/tha00005 ID. Tourtelot, H. A. 5 Laminated sands and clayey silts of the Ackerman formation overlying gray silty clays of the upper phase of the bauxite-kaolin zone. Looking north, 6 miles northwest of Ripley, SE1/4 sec. 29, T. 3 S., R. 3 E. Tippah County, Mississippi. November 17, 1942. #1:/Henry Tourtelot Collection/tha00006 ID. Tourtelot, H. A. 6 Laminated sands and clayey silts of the Ackerman formation showing the deposition of clay balls and breccia from the contemporaneous erosion of a laminated clayey silt bed. Looking east, 6 miles northwest of Ripley, SE1/4 sec. 29, T. 3 S., R. 3 E. Tippah County, Mississippi. Noirember 11,1942. #1:/Henry Tourtelot Collection/tha00007 ID. Tourtelot, H. A. 7 Close-up of photo no. 6 showing the deposition of clay balls and breccia from the contemporaneous erosion of a laminated clayey silt bed. Looking east, 6 miles northwest of Ripley, SE1/4 sec. 29, T. 3 S., R. 3 E. Tippah County, Mississippi. November 17, 1942. #1:/Henry Tourtelot Collection/tha00008 ID. Tourtelot, H. A. 8 Small channel in Ackerman sand. The hammer is at the base of the channel. Small and large contemporaneous channels of this type are common in the Ackerman. Looking northeast, 8 1/2 miles west of Ripley, NE1/4 SE1/4 sec. 9, T. 4 S., R. 2 E. Benton County, Mississippi. January 20, 1943. #1:/Henry Tourtelot Collection/tha00009 ID. Tourtelot, H. A. 9 Ackerman-Holly Springs contact near Flat Rock Church. Note the indurated silt carrying reed or grass impressions. Looking northwest, 4 miles west-southwest of Blue Mountain, N E1/4 NW1/4 sec. 16, T. 5 S., R. 2 E. Benton County, Mississippi. July 28, 1943. #1:/Henry Tourtelot Collection/tha00010 ID. Tourtelot, H. A. 10 Porters Creek/Ackerman contact; clay balls at the base of red, argillaceous sand are resting on gray sideritic clays which grade into the Porters Creek clay. Looking west, 2 miles west of Blue Mountain, NW1/4 SW1/4 sec. 11, T. 5 S., R. 2 E. Tippah County, Mississippi. July 28, 1943. #1:/Henry Tourtelot Collection/tha00011 ID. Tourtelot, H. A. 11 View of Wicker Mountain looking northeast across the Tippah Creek bottoms and the Flatwoods, from about half a mile northvest of Blue Mountain. Looking northeast. NW1/4 sec. 1, T. 5 S. R. 2 E. Tippah County, Mississippi. October 29, 1943. #1:/Henry Tourtelot Collection/tha00012 ID. Tourtelot, H. A. 12 Contact between Ackerman sand above and kaolin of the lower phase of the bauxite-kaolin zone below. Looking west, one-quarter mile east of Shady Grove, NW1/4 sec, 12, T. 4 S., R. 2 E. Tippah County, Mississippi. October 30, 1943. #1:/Henry Tourtelot Collection/tha00013 ID. Tourtelot, H. A. 13 Steeply-dipping contact between Ackerman breccia and Porters Creek clay; hammer is at contact. Looking south 1 3/4 miles north of Shady Grove, SE1/4 sec. 35, T. 3 S., R. 2 E. Tippah County, Mississippi. October 30, 1943. #1:/Henry Tourtelot Collection/tha00014 ID. Tourtelot, H. A. 14 Bauxite boulders at the north end of the Meadows bauxite deposit. Looking northwest, about 2 miles north of Shady Grove, NW1/4SW1/4 sec. 36, T. 3 S., R. 2 E. Tippah County, Mississippi. October 30, 1943. #1:/Henry Tourtelot Collection/tha00015 ID. Tourtelot, H. A. 15 The Blue Mountain Ridge, a large outlier of Ackerman sand, from the Tippah Firetower. Looking southeast by south from sec. 4, T. 4 S., R. 2 E. Benton County, Mississippi. October 30, 1943. #1:/Henry Tourtelot Collection/tha00016 ID. Tourtelot, H. A. 16 Wicker Mountain from the Tippah Firetower. Looking east from sec. 4, T. 4 S., R 2 E. Benton County, Mississippi. October 30, 1943. #1:/Henry Tourtelot Collection/tha00017 ID. Tourtelot, H. A. 17 Shelby Creek valley from the Tippah Firetover. Looking northeast from sec. 4, T. 4 S., R. 2 E. Benton County, Mississippi. October 30, 1943. #1:/Henry Tourtelot Collection/tha00018 ID. Tourtelot, H. A. 18 Porters Creek clay 3 miles northwest of Ripley. Looking south. Sec. 9, T. 4 S., R. 3 E. Tippah County, Mississippi. October 30, 1943. #1:/Henry Tourtelot Collection/tha00019 ID. Tourtelot, H. A. 19 Coarse-grained red Ackerman sand resting on fine-grained clayey Ackerman sand in a sand pit 3 1/2 miles north of Ripley. Looking southwest. NE1/4 sec. 36, T. 3 S., R. 3 E. Tippah County, Mississippi. October 30, 1943. #1:/Henry Tourtelot Collection/tha00020 ID. Tourtelot, H. A. 20 Bed of lignite in the lower part of the upper phase of the bauxite-kaolin zone at Little Hope Crossroads. Looking north 3 1/2 miles vest of Falkner, SW1/4 NW1/4 sec. 5, T. 3 S., R. 3 E. Tippah County, Mississippi, October 30, 1943. #1:/Henry Tourtelot Collection/tha00021 ID. Tourtelot, H. A. 21 The I. V. James bauxite deposit from the southwest. Looking northeast. NE1/4NE1/4 sec. 4, T. 3 S., R. 3 E. Tippah County, Mississippi. October 30, 1943. #1:/Henry Tourtelot Collection/tha00022 ID. Tourtelot, H. A. 22 Boulders and outcrop of bauxite at the tip of the McGill-Tapp ridge: Test Pit No. 1 of Morse is at the top of the ridge under the large tree at the left. Looking northeast. SW1/4NE1/4 sec. 12, T. 3 S., R. 2 E. Benton County, Mississippi. October 30, 1943. #1:/Henry Tourtelot Collection/tha00023 ID. Tourtelot, H. A. 23 View of Wicker Mountain from across the Flatwoods and the Tippah Creek bottoms from Blue Mountain. Tippah County, Mississippi. October 30, 1943. #1:/Henry Tourtelot Collection/tha00024 ID. Tourtelot, H. A. 24 "Going into the hole" with a string of power auger tools on a Longyear diamond drill equipped with an oil hydraulic pulldown. Equipment of Pennsylvania Drilling Co. Hole 2. Tippah County, Mississippi. May 1943. #1:/Henry Tourtelot Collection/tha00025 ID. Tourtelot, H. A. 25 "Coming out of the hole" with a string of power auger tools. Equipment of the Pennsylvania Drilling Co. Hole 2. Tippah County, Mississippi. May 1943. #1:/Henry Tourtelot Collection/tha00026 ID. Tourtelot, H. A. 26 "Making a trip" with a Longyear diamond drill using a fishtail bit. Note string of tools in the hole hanging on a wrench caught on the end of the rig skid. The uppermost joint of rod, with water hose attached, is resting on the board to the right of the hole. Equipment of the Pennsylvania Drilling Co. Tippah County, Mississippi. May 1943. #1:/Henry Tourtelot Collection/tha00027 ID. Tourtelot, H. A. 27 Attaching new stellite bit to outer barrel of a double-barrel core barrel. Drill rods at left are size "A". The core barrel is 13 feet long, and will take a 11-foot core. Inside diameter of inner barrel about 2 1/4 inches. Outside diameter of outer barrel is about 3 inches. Equipment of the Pennsylvania Drilling Co. Tippah County, Mississippi. May 1943. #1:/Henry Tourtelot Collection/tha00028 ID. Tourtelot, H. A. 28 Drilling with Longyear diamond drill. The heavy jack in the background is used to pull casing. Equipment of Pennsylvania Drilling Co. Tippah County, Mississippi. May 1943. #1:/Henry Tourtelot Collection/tha00029 ID. Tourtelot, H. A. 29 Driving a 4-inch casing with a 300-pound block hammer on a Longyear diamond drill. Equipment of Pennsylvania Drilling Co. Tippah County, Mississippi. May 1943. #1:/Henry Tourtelot Collection/tha00030 ID. Tourtelot, H. A. 30 Adding a rod to the core barrel hanging on a wrench caught on the end of the rig skid. Equipment of Pennsylvania Drilling Co. Tippah County, Mississippi. May 1943. #1:/Henry Tourtelot Collection/tha00031 ID. Tourtelot, H. A. 31 Isopachous maps of bauxite and clay in the Shelton area. Tippah County, Mississippi. May 1943. #1:/Professional Paper 594-L/tha00032 ID. Tourtelot, H. A. 32 Contact between light-colored marlstone of the Niobrara Formation (above) and dark shale of the Carlile Shale (below). The locality is USGS Mesozoic loc. D3757, 8 miles south of Fairburn. (NE1/4NW1/4SW1/4 sec. 36, T. 5 S., R. 7 E., Fairburn SW 7 1/2 minute quadrangle). Phosphate nodules preserving identifiable fossils and other nodules showing only vague traces of fossils or none at all are strewn along contact. All nodules showing well-preserved fossils had been collected previously. Nodules visible just below hammer and the bush on the left. White objects on shale are platy limestone flakes washed down from the Niobrara Formation. Custer County, South Dakota, ca. 1967. Published as figure 2 in U. S. Geological Survey. Professional paper 594-L. 1968. #1:/Professional Paper 594-L/tha00033 ID. Tourtelot, H. A. 33 Contact between Niobrara Formation (above) and Carlile Shale (below) at a locality about k miles south of Fairburn in the NW1/4SE1/4 sec. 13, T. 5 S., R. 7 E. The phosphate nodules are in the bed at the head of the hammer. The matrix of the bed consists of pyrite, mostly oxidized to yield iron oxides and gypsum. Custer County, South Dakota, ea. 1967. Published as figure 3 in U. S. Geological Survey. Professional paper 594-L. 1968. #1:/Professional Paper 594-L/tha00034 ID. Tourtelot, H. A. 34 A rock specimen of the upper surface of the nodule bed at locality pictured in photo no. 33. The upper surface of the matrix in which the nodules are embedded is made up of iron oxides resulting from the oxidation of underlying pyrite. Custer County. South Dakota. ca. 1967. Published as figure 4 in U. S. Geological Surrey. Professional paper 594-L. 1968. #1:/Professional Paper 594-L/tha00035 ID. Tourtelot, H. A. 35 Part of cross section of nodule-bed specimen. Specimen from locality pictured in photo no. tha00033. Many small nodules and fragments of fish teeth and bones make up groundmass of the larger nodules. The matrix is cemented with pyrite, much of which has altered to iron oxides and gypsum along bottom and top of bed. The light-colored streak at the left is ferruginous gypsum. Custer County, South Dakota, ca. 1967. Published as figure 5 in U. S. Geological Survey. Professional paper 594-L. 1968. #1:/Professional Paper 594-L/tha00036 ID. Tourtelot, H. A. 36 Nodules from U, S. Geological Survey Mesozoic loc. D3757 that show recognizable but not identifiable traces of fossils and irregular lumpy nodules that do not reveal traces of fossils. First specimen second row from bottom is a fragment of baculite. Bottom specimens are pelecypods. Custer County, South Dakota, ca. 1967. Published as figure 6 in U. S, Geological Survey. Professional paper 594-L. 1968. #1:/Professional Paper 594-L/tha00037 ID. Tourtelot, H. A. 37 Part of cross section of nodule-bed specimen. Specimen from locality pictured in photo no. tah00033. Most of the ooids are replaced with pyrite. The veins in the nodules are filled mostly with pyrite that extends into the matrix. Calcite incorporates pyrite in some parts of the veins, and some of the pyrite has altered to gypsum. The light-gray mineral surrounding fragments at the lower left of the nodule is pyrite. Custer County, South Dakota, ca. 1967. Published as figure 7 in U. S. Geological Survey. Professional paper 594-L. 1968. #1:/Professional Paper 594-L/tha00038 ID. Tourtelot, H. A. 38 Ooids largely replaced by pyrite. Note that pyrite in rein is not distinguishable from pyrite in the ooids that the vein cuts. Enlargement X 80. Thin section photographed in reflected green light. Custer County, South Dakota, ea. 1967. (Photomicrograph) Published as figure 8 in U. S. Geological Survey, Professional paper 594-L. 1968. #1:/Professional Paper 594-L/tha00039 ID. Tourtelot, H. A. 39 Pyrite in matrix of nodule bed. At upper left is the border of relatively large nodule in bed. At lower left is an area clouded with iron oxides. Note small nodules in lower center. Elongated objects lower right are fragments of fish bone in matrix. Enlargement X 40. Smoothed surface photographed in green light. Custer County, South Dakota, ca. 1967. (Photomicrograph) Published as figure 9 in U. S. Geological Survey. Professional paper 594-L. 1968. #1:/Professional Paper 594-L/tha00040 ID. Tourtelot, H. A. 40 Thin section of area outlined in photo no. tha00044. Note that there is no trace of baculite shell in continuation of the shell mold. The darker mottled parts represent disseminated fine-grained pyrite. Most of the clear ooids are filled or partly filled with barite. The dark ooids and the dark rings and masses in them are pyrite or iron oxide. Enlargement X 12. Custer County, South Dakota, ca. 1967. (Photomicrograph) Published as plate 2, figure 1 in U. S. Geological Survey. Professional paper 594-L. 1968. #1:/Henry Tourtelot Collection/tha00041 ID. Tourtelot, H. A. 41 Ooid consisting of original pale-brown apatite containing pyrite, both partly engulfed by a euhedral crystal of barite. Note annular phosphate ring at lower left, terminating against face of barite crystal, and absence of ghosts in barite. Pyrite in barite is not exidized. Enlargement X 40. Custer County, South Dakota. ca. 1967. #1:/Professional Paper 594-L/tha00042 ID. Tourtelot, H. A. 42 Bladed crystals of barite in a matrix of iron oxide and apatite. Enlargement X 40. Custer County, South Dakota, ca. 1968. (Photomicrograph) Left portion published as plate 2, figure 6 in U.S. Geological Survey. Professional paper 594-L. 1968. #1:/Professional Paper 594-L/tha00043 ID. Tourtelot, H. A. 43 Pelagic foraminifer replaced by barite and filled with apatite and pyrite. Fragments of other foraminifer tests also are visible. Globular body at left is a section of either a foraminifer chamber or a radiolarian filled with barite and containing two pyrite crystals. Enlargement X 100. Custer County, South Dakota, ca. 1967. (Photomicrograph) Middle portion published as plate 2, figure 7 in U. S. Geological Survey. Professional paper 594-L. 1968. #1:/Professional Paper 594-L/tha00044 ID. Tourtelot, H. A. 44 Cross section of a phosphate nodule showing casts of a baculite and an inoceraxa. Groundmass is microcrystalline apatite. Note mottled nature of apatite and the randomly distributed light-colored ooids; dark ooids are also present. Crevice is mold of bacuiite shell. Enlargement X 2. Custer County, South Dakota. ca. 1967. Published as plate 2, figure 8 in U. S. Geological Survey. Professional paper 594-L. 1968. #1:/Professional Paper 594-L/tha00045 ID. Tourtelot, H. A. 45 Phosphatic nodule containing three fossils: concave upwards internal cast of an inoceram; cast of outer surface of an inoceram also concave upward; crevice that is a mold of the inoceramid shell; now filled with gypsum; internal cast of a small inoceram concave downward. The beak is at the right. Enlargement X 2. Custer County, South Dakota, ca. 1967. Published as plate 2, figure 9 in U. S. Geological Survey. Professional paper 594-L. #1:/Pampeyan Collection/peh10008 ID. Pampeyan, E.H. 10008 Views of Intermountain Power Project (IPP) site, approx. 11 miles west of Lynndyl. Millard County, Utah. May 28, 1981. #1:/Pampeyan Collection/peh10009 ID. Pampeyan, E.H. 10009 Views of Intermountain Power Project (IPP) site, approx. 11 miles west of Lynndyl. Millard County, Utah. May 28, 1981. #1:/Pampeyan Collection/peh10010 ID. Pampeyan, E.H. 10010 Los Angeles Dept. of Water and Power bench mark on IPP site. (L.A. is to be main beneficiary of power generated here). Millard County, Utah. May 1981. #1:/Pampeyan Collection/peh10011 ID. Pampeyan, E.H. 10011 View north of lake beds at south edge of Gilson Moutains. Viewpoint is from Oak City road, 1 mile south of Leamington. Millard County, Utah. May 1981. #1:/Pampeyan Collection/peh10012 ID. Pampeyan, E.H. 10012 Martin-Marietta cement plant under condstruction, approx. 5 miles east of Leamington, at milepost 10 on Meamington-Nephi highway. Millard County, Utah. May 1981. #1:/Pampeyan Collection/peh10013 ID. Pampeyan, E.H. 10013 Quarry for "cement rock" at Martin-Marietta site. Millard County, Utah. May 1981. #1:/Pampeyan Collection/peh10014 ID. Pampeyan, E.H. 10014 Bonneville (?) gravel bar along Highway 6 (east of Champlin), views north. Millard County, Utah. May 1981. #1:/Pampeyan Collection/peh10015 ID. Pampeyan, E.H. 10015 Bonneville (?) gravel bar along Highway 6 (east of Champlin), views north. Millard County, Utah. May 1981. #1:/Pampeyan Collection/peh10016 ID. Pampeyan, E.H. 10016 Bonneville (?) gravel bar along Highway 6 (east of Champlin), views north. Millard County, Utah. May 1981. #1:/Pampeyan Collection/peh10017 ID. Pampeyan, E.H. 10017 Views east of Mt. Nebo. Garrett County, Utah. May 28-29, 1981. #1:/Pampeyan Collection/peh10018 ID. Pampeyan, E.H. 10018 Views east of Mt. Nebo. Garrett County, Utah. May 28-29, 1981. #1:/Pampeyan Collection/peh10019 ID. Pampeyan, E.H. 10019 Monument at Topaz. Topaz was a Internment Camp for Japanese-Americans during World War II located NW of Delta. Millard County, Utah. May 31, 1981. #1:/Pampeyan Collection/peh10020 ID. Pampeyan, E.H. 10020 Remains of "spa" at Baker (Abraham) Hot Springs, east side of Crater Bench. Millard County, Utah. May 31, 1981. #1:/Pampeyan Collection/peh20002 ID. Pampeyan, E.H. 20002 White (Bonneville) lake beds on basalt, just below wave-cut (Provo?) bench north of Baker Hot Springs. Millard County, Utah. May 1981. #1:/Pampeyan Collection/peh20003 ID. Pampeyan, E.H. 20003 Bonneville Lake beds north of Leamington, at base of Gilson Moutains. Millard County, Utah. June 1981. #1:/Pampeyan Collection/peh30001 ID. Pampeyan, E.H. 30001 Pan View southeast of Point of the Mountain from vicinity of Bluffdale (Highway 68). Millard County, Utah. June 1981. #1:/Pampeyan Collection/peh30002 ID. Pampeyan, E.H. 30002 Pan View southeast of Point of the Mountain from vicinity of Bluffdale (Highway 68). Millard County, Utah. June 1981. #1:/Pampeyan Collection/peh30003 ID. Pampeyan, E.H. 30003 Pan View southeast of Point of the Mountain from vicinity of Bluffdale (Highway 68). Millard County, Utah. June 1981. #1:/Peru Earthquake May 31, 1970/peru0001 ID. PERUVIAN EARTHQUAKE, 1 North Peak of Nevados Huascaran, the source of debris avalanche that buried the town of Yungay and Ronrajirca. An estimated 25-50 million cubic waters of and ice broke from the part of the peak in shadow. Peru. 1970. #1:/Peru Earthquake May 31, 1970/peru0002 ID. PERUVIAN EARTHQUAKE, 2 Peru Earthquake May 31, 1970. Block of granodiorite (estimated to weigh 700 tons) that was transported by the Huascaran debris avalanche to near the site of the former town of Ranrahirca. A layer of mud showing polygonal cracks resulted from seepage from the avalanche after it came to rest. The top of the block is covered with mud and rock fragments deposited by the avalanche after the block came to rest. 1970. Figure 6, U.S. Geological Survey Circular 639. #1:/Peru Earthquake May 31, 1970/peru0003 ID. PERUVIAN EARTHQUAKE, 3 Peru Earthquake May 31, 1970. Destruction of adobe houses in Huaraz. Rubble fills the street to a depth of several feet. 1970. Figure 3, U.S. Geological Survey Circular 639. #1:/Peru Earthquake May 31, 1970/peru0004 ID. PERUVIAN EARTHQUAKE, 4 Statue of Christ at Cemetery Hill overlooking Yungay, which together with 4 palm trees, is all that remains of the city. Peru. 1970. #1:/Peru Earthquake May 31, 1970/peru0005 ID. PERUVIAN EARTHQUAKE, 5 Peru Earthquake May 31, 1970. Sand boil (sand volcano) in water-saturated unconsolidated sediments of the Casma Valley. During the earthquake, jets of muddy and sandy water squirted from the two pits. The mound of ejected sand is more than 1 meter in diameter. 1970. Figure 11, U.S. Geological Survey Circular 639. #1:/Peru Earthquake May 31, 1970/peru0006 ID. PERUVIAN EARTHQUAKE, 6 Overturned bus on top of debris avalanche at site of former Plaza de Armas, Yungay. Depth of avalanche here is about 15 feet, Peru, 1970. #1:/Peru Earthquake May 31, 1970/peru0007 ID. PERUVIAN EARTHQUAKE, 7 Aerial view showing mountain range including Nevada Huascaran, highest peak in Peru. Massive avalanche of ice and rock debris, triggered on North Peak by May 31, 1970 earthquake, buried towns of Yungay and Ranrahirca, killing more than 20,000 people - about 40 per cent of total death toll. Avalanche started with sliding of mass of glacial ice and rock about 3,000 feet wide and one mile long that swept downslope about nine miles to Yungay at average speed of over 100 miles an hour. Ice picked up morainal material; by the time mass reached Yungay, is estimated to have consisted of about 80 million cubic feet of water, mud and rocks. Peru. 1970. (Photo by Servicio Aerofotografico National) Published as figure 2 in U. S. Geological Survey. Circular 639. 1970. #1:/Peru Earthquake May 31, 1970/peru0008 ID. PERUVIAN EARTHQUAKE, 8 A lobe of the Huascaran debris avalanche that now covers the former city of Yungay; the avalanche flowed over a 100-200 meter high ridge (arrow) between Yungay and Llanganuco Valley. Peru. 1970. Published as figure 4 in U. S. Geological Survey. Circular 639. 1970. #1:/Peru Earthquake May 31, 1970/peru0009 ID. PERUVIAN EARTHQUAKE, 9 Large impact crater (2.5 meters deep, 7 meters wide, and 11 meters long) in field at the south side of Quebrada Llanganuca, which was made by a huge block of rock or cluster of rocks hurled several hundred meters by the Huarascan debris avalanche. All rocks in or near crater are projectiles or fragments of projectiles from the avalanche. The two large rocks in the crater are about 2 1/2 meters in longest dimension. Peru. 1970. Published as figure 3 in U. S. Geological Survey. Circular 639. 1970. #1:/Peru Earthquake May 31, 1970/peru0010 ID. PERUVIAN EARTHQUAKE, 10 Rotational slide in unconsolidated fluvioglacial sediments, east side of Rio Santa at Recuay; a small lake formed behind toe of slide. Headwall of slide (arrows) is as much as 10-15 meters high. Peru. 1970. Published as figure 7 in U. S. Geological Survey. Circular 639. 1970. #1:/Peru Earthquake May 31, 1970/peru0011 ID. PERUVIAN EARTHQUAKE, 11 Peru Earthquake May 31, 1970. Slumping and fissuring of the paved road near the bay shore in western Chimbote due to liquefaction and lateral spreading of water-saturated beach sediments. 1970. Figure 8, U.S. Geological Survey Circular 639. #1:/Peru Earthquake May 31, 1970/peru0012 ID. PERUVIAN EARTHQUAKE, 12 Chimbote-Huallanca railroad damaged as the result of differential compaction and lateral spreading of water-saturated unconsolidated sediments. Peru. 1970. Published as figure 9 in U. S. Geological Survey. Circular 639. 1970. #1:/Peru Earthquake May 31, 1970/peru0013 ID. PERUVIAN EARTHQUAKE, 13 Peru Earthquake May 31, 1970. Concrete block house in the Corporacion Peruana del Santa housing development in Chimbote which was torn apart by liquefaction and lateral flow of beach sediments that constitute the foundation material. 1970. Figure 10, U.S. Geological Survey Circular 639. #1:/Peru Earthquake May 31, 1970/peru0014 ID. PERUVIAN EARTHQUAKE, 14 Destruction of houses in residential area of southeastern Chimbote where the ground settled due to compaction of water-saturated sediments; flooded area was dry before the earthquake, Peru, 1970. Published as figure 12 in U. S. Geological Survey, Circular 639. 1970. #1:/Molnia Collection of matching pairs/mbf00001 ID. Molnia, B.F. 1 Muir Glacier. Alaska. 2004. #1:/Molnia Collection of matching pairs/mbf00002 ID. Molnia, B.F. 2 West part of front of Harvard Glacier, from point L. The glacier on the left, not reaching tidewater, is the Baltimore and the large ice stream joining the Harvard Glacier is the Radcliffe. Valdez distict, Alaska Gulf region, Alaska. 2000. See Photo No. mbf00002 for matching pair. #1:/Molnia Collection of matching pairs/mbf00003 ID. Molnia, B.F. 3 Glacier Bay National Park and Preserve, Alaska. Terminus of Carroll Glacier, viewed from Triangle Island in Queen Inlet. 2003. See Photo No. wcw00333 for matching pair. #1:/Molnia Collection of matching pairs/mbf00004 ID. Molnia, B.F. 4 Kenai Fjords National Park, Alaska. Holgate Glacier. 2004. See Photo No. gus00132 for matching pair. #1:/Molnia Collection of matching pairs/mbf00005 ID. Molnia, B.F. 5 Etek Glacier. Alaska. 2004. #1:/Molnia Collection of matching pairs/mbf00006 ID. Molnia, B.F. 6 Kenai Fjords National Park, Alaska. Central part of McCarty Glacier. 2004. See Photo No. gus001144 for matching pair. #1:/Molnia Collection of matching pairs/mbf00007 ID. Molnia, B.F. 7 Lamplugh Glacier. Alaska. 2003. #1:/Molnia Collection of matching pairs/mbf00008 ID. Molnia, B.F. 8 Glacier Bay National Park and Preserve, Alaska. Front of Muir Glacier, viewed from the east shore of the inlet. The ice front is 250 feet high. The upper part is divided by crevasses, but these are limited downward, leaving the lower part massive. The icebergs in the foreground are stranded. 2003. See Photo No. ggk00276 for matching pair. #1:/Molnia Collection of matching pairs/mbf00009 ID. Molnia, B.F. 9 Alaska Glaciers. Toboggan Glacier and Harriman Fjord. Toboggan Glacier is southeast of Anchorage in the Chugach Mountains. 2000. See Photo No. pai00731 for matching pair. #1:/Molnia Collection of matching pairs/mbf00010 ID. Molnia, B.F. 10 Muir Glacier. Alaska. 2003. #1:/Molnia Collection of matching pairs/mbf00011 ID. Molnia, B.F. 11 Pedersen Glacier. Alaska. 2004. #1:/Molnia Collection of matching pairs/mbf00012 ID. Molnia, B.F. 12 Adams Glacier. Alaska. 2003. #1:/Molnia Collection of matching pairs/mbf00013 ID. Molnia, B.F. 13 Glacier Bay National Park and Preserve, Alaska. Carroll Glacier, Queen Inlet. 2004. See Photo No. wcw00335 for matching pair. #1:/Molnia Collection of matching pairs/mbf00014 ID. Molnia, B.F. 14 Kenai Fjords National Park, Alaska. East part of McCarty Glacier. 2004. See Photo No. gus00143 for matching pair. #1:/Molnia Collection of matching pairs/mbf00015 ID. Molnia, B.F. 15 Muir Glacier. Alaska. 2004. #1:/Glover Collection/gnc00001 ID. Glover, N.C. 1 Stephens Creek near Fort Bayard. Grant County, New Mexico. cc 1910. #1:/Glover Collection/gnc00002 ID. Glover, N.C. 2 Main Street of Silver City. Overhead cross walk made of wood. Grant County, New Mexico. cc 1910. #1:/Glover Collection/gnc00003 ID. Glover, N.C. 3 Creek in location of former business street in Silver City after flood [Silver City is also known as San Vicente de la Cienega]. Grant County, New Mexico. cc 1910. #1:/Glover Collection/gnc00004 ID. Glover, N.C. 4 Creek in location of former business street in Silver City after flood. Grant County, New Mexico. cc 1910. #1:/Glover Collection/gnc00005 ID. Glover, N.C. 5 Cameron Creek looking upstream from Pumping plant, Fort Bayard. Grant County, New Mexico. cc 1910. #1:/Glover Collection/gnc00006 ID. Glover, N.C. 6 Cameron Creek at Pumping plant, Fort Bayard. Grant County, New Mexico. cc 1910. #1:/Glover Collection/gnc00007 ID. Glover, N.C. 7 Cameron Creek downstream from Pumping plant, Fort Bayard. Grant County, New Mexico. cc 1910. #1:/Glover Collection/gnc00008 ID. Glover, N.C. 8 Cameron Creek near Easton's Ranch. Fort Bayard. Grant County, New Mexico. cc 1910. #1:/Glover Collection/gnc00009 ID. Glover, N.C. 9 Cameron Creek near Easton's Ranch. Fort Bayard. Grant County, New Mexico. cc 1910. #1:/Glover Collection/gnc00010 ID. Glover, N.C. 10 Cameron Creek near Easton's Ranch. Fort Bayard. Grant County, New Mexico. cc 1910. #1:/Glover Collection/gnc00011 ID. Glover, N.C. 11 Travertine beds, Platt National Park. [Originally named Sulphur Springs Reservation in July 1, 1902. Designated Platt National Park in June 29, 1906. Renamed Chickasaw Recreation Area, March 17, 1976.] Murray County, Oklahoma. cc 1910. #1:/Glover Collection/gnc00012 ID. Glover, N.C. 12 Little Niagara Sulphur Creek, Platt National Park. Murray County, Oklahoma. cc 1910. #1:/Glover Collection/gnc00013 ID. Glover, N.C. 13 Platt National Park. Murray County, Oklahoma. cc 1910. #1:/Glover Collection/gnc00014 ID. Glover, N.C. 14 Antelope Spring. Platt National Park. Murray County, Oklahoma. cc 1910. #1:/Alaska-Bulletin 247/mfh00005 ID. Moffit, F.H. 5 Lava flow on Cottonwood Creek. Cliff of broken basalt. Fairhaven District, Seward Peninsula Region, Alaska. 1903. Plate 6-A in US Geological Survey Bulletin 247. 1905. #1:/Alaska-Bulletin 247/mfh00006 ID. Moffit, F.H. 6 Erosion features in granite near Asses Ears. Fairhaven District, Seward Peninsula Region, Alaska. July 26,1903. Plate 4-B in US Geological Survey Bulletin 247. 1905. #1:/Alaska-Bulletin 247/mfh00007 ID. Moffit, F.H. 7 West Cone of Asses Ears, taken from a point on East Cone 75 feet from top. Fairhaven District, Seward Peninsula Region, Alaska. July 26,1903. Plate 5-A in US Geological Survey Bulletin 247. 1905. #1:/Alaska-Bulletin 247/mfh00009 ID. Moffit, F.H. 9 Asses Ears, looking southeast, distance one mile. Fairhaven District, Seward Peninsula Region, Alaska. July 26,1903. Plate 5-B in US Geological Survey Bulletin 247. 1905. #1:/Alaska-Bulletin 247/mfh00013 ID. Moffit, F.H. 13 "Hot Springs" on Upper Inmachuk River. Fairhaven District, Seward Peninsula Region, Alaska. July 29, 1903. Plate 9-B in US Geological Survey Bulletin 247. 1905. #1:/Alaska-Bulletin 247/mfh00015 ID. Moffit, F.H. 15 Sluicing on Hannum Creek. Fairhaven District, Seward Peninsula Region, Alaska. July 31,1903. Plate 9-A in US Geological Survey Bulletin 247. 1905. #1:/Alaska-Bulletin 247/mfh00018 ID. Moffit, F.H. 18 Nelson Gulch, looking N25°W. Fairhaven District, Seward Peninsula Region, Alaska. August 2, 1903. Plate 10-A in US Geological Survey Bulletin 247. 1905. #1:/Alaska-Bulletin 247/mfh00024 ID. Moffit, F.H. 24 Winter cabins on Inmachuk River, Fox's and Shibsby's. Fairhaven District, Seward Peninsula Region, Alaska. 8/05/1903. Plate 14-B in US Geological Survey Bulletin 247. 1905. #1:/Alaska-Bulletin 247/mfh00026 ID. Moffit, F.H. 26 Sluicing on Inmachuk River, Dashley's claim, looking south. Fairhaven District, Seward Peninsula Region, Alaska. August 7, 1903. Plate 12-A in US Geological Survey Bulletin 247. 1905. #1:/Alaska-Bulletin 247/mfh00028 ID. Moffit, F.H. 28 Lava rim on the lower Inmachuk River, Fries Camp. Fairhaven District, Seward Peninsula Region, Alaska. August 7, 1903. Plate 8-A in US Geological Survey Bulletin 247. 1905. #1:/Alaska-Bulletin 247/mfh00029 ID. Moffit, F.H. 29 Dam on the Lower Inmachuk River for diverting the stream from its bed. Looking west. Fries Claim. Fairhaven District, Seward Peninsula Region, Alaska. August 7, 1903. Plate 11-A in US Geological Survey Bulletin 247. 1905. #1:/Alaska-Bulletin 247/mfh00030 ID. Moffit, F.H. 30 Pump on the Lower Inmachuk River. Fries Claim. Fairhaven District, Seward Peninsula Region, Alaska. August 7, 1903. Plate 11-B in US Geological Survey Bulletin 247. 1905. #1:/Alaska-Bulletin 247/mfh00033 ID. Moffit, F.H. 33 Automobile boiler used for thawing frozen gravels on Inmachuk River, Fairhaven District, Seward Peninsula Region, Alaska. August 7, 1903. Plate 10-B in US Geological Survey Bulletin 247. 1905. #1:/Alaska-Bulletin 247/mfh00037 ID. Moffit, F.H. 37 "Shist Monuments" 10 miles north of Kiwalik Mountain, due to weathering. August 23,1903. Monument Mountain, Fairhaven District, Seward Peninsula Region, Alaska. Plate 4-A in US Geological Survey Bulletin 247. 1905. #1:/Alaska-Bulletin 247/mfh00045 ID. Moffit, F.H. 45 Terraced granites east of Kiwalik River. Fairhaven District, Seward Peninsula Region, Alaska. August 30, 1903. Plate 8-B in US Geological Survey Bulletin 247. 1905. #1:/Alaska-Bulletin 247/mfh00049 ID. Moffit, F.H. 49 China pump on Candle Creek. Fairhaven District, Seward Peninsula Region, Alaska. September 7, 1903. Plate 13-A in US Geological Survey Bulletin 247. 1905. #1:/Alaska-Bulletin 247/mfh00053 ID. Moffit, F.H. 53 Bench Claim on Candle Creek, showing 12 feet of ice above the gravel. Fairhaven District, Seward Peninsula Region, Alaska. September 7, 1903. Plate 13-B in US Geological Survey Bulletin 247. 1905. #1:/Alaska-Bulletin 247/mfh00055 ID. Moffit, F.H. 55 Thawer on 12 Bench, Candle. Fairhaven District, Seward Peninsula Region, Alaska. September 4, 1903. Plate 14-A in US Geological Survey Bulletin 247. 1905. #1:/Alaska-Bulletin 247/mfh00058 ID. Moffit, F.H. 58 Candle, on Kiwalik River at mouth of Candle Creek, looking northwest. Fairhaven District, Seward Peninsula Region, Alaska. August 7, 1903. Plate 12-B in US Geological Survey Bulletin 247. 1905. #1:/Alaska-Bulletin 277/mfh00095 ID. Moffit, F.H. 95 Hanging valley near head of Johnson creek; taken late in June. Seward district, Alaska Gulf region, Alaska. 1904. Plate 6-B in U.S. Geological Survey. Bulletin 277. 1906. #1:/Alaska-Bulletin 277/mfh00105 ID. Moffit, F.H. 105 Forks of Sixmile creek, down east fork, a bridge crosses Canyon creek, on the left of which is the high gravel bank, a high bench is on the left. Seward district, Alaska Gulf region, Alaska. 1904. Plate 7-B in U.S. Geological Survey. Bulletin 277. 1906. #1:/Alaska-Bulletin 587/mfh00109 ID. Moffit, F.H. 109 Gravels on rock bench, Canyon Creek. Seward district, Alaska Gulf region, Alaska. 1904. Plate 34-B in U.S. Geological Survey. Bulletin 587. 1915. #1:/Alaska-Bulletin 277/mfh00110 ID. Moffit, F.H. 110 Canyon Creek, showing the high gravels on the right; the trestlework formerly carried a flume. Seward district, Alaska Gulf region, Alaska. 1904. Plate 9-A in U.S. Geological Survey. Bulletin 277. 1906. #1:/Alaska-Bulletin 277/mfh00116 ID. Moffit, F.H. 116 Mills creek just below the mouth of Juneau creek; Juneau creek once flowed through the gravel filled channel over which the pipe line lies, show the manner in which boulders are handled. Seward district, Alaska Gulf region, Alaska. 1904. Plate 10-B in U.S. Geological Survey. Bulletin 277. 1906. #1:/Alaska-Bulletin 277/mfh00120 ID. Moffit, F.H. 120 Canyon creek, showing the steep rock walls capped with gravels, and the remains of an old wing dam and China pump. Seward district, Alaska Gulf region, Alaska. 1904. Plate 7-A in U.S. Geological Survey. Bulletin 277. 1906. #1:/Alaska-Bulletin 277/mfh00121 ID. Moffit, F.H. 121 Gravel bench near the mouth of Mills creek, looking across Canyon creek. The valley of Mills creek is seen on the right. Seward district, Alaska Gulf region, Alaska. 1904. Plate 10-A in U.S. Geological Survey. Bulletin 277. 1906. #1:/Alaska-Bulletin 277/mfh00128 ID. Moffit, F.H. 128 Down East creek toward Resurrection creek, good example of a glaciated valley. Seward district, Alaska Gulf region, Alaska. 1904. Plate 6-A in U.S. Geological Survey. Bulletin 277. 1906. #1:/Alaska-Bulletin 277/mfh00129 ID. Moffit, F.H. 129 Panoramic view from head of Resurrection Creek, looking east and south, photographs are taken from an elevation of 5,000 feet and show the accordance of summits in the Kenai Mountains. The average elevation is between 4,000 and 5,000 feet above sea level. Seward district, Alaska Gulf region, Alaska. 1904. Plate 5-A in U.S. Geological Survey. Bulletin 277. 1906. #1:/Alaska-Bulletin 277/mfh00130 ID. Moffit, F.H. 130 Panoramic view from head of Resurrection Creek, looking east and south, photographs are taken from an elevation of 5,000 feet and show the accordance of summits in the Kenai Mountains. The average elevation is between 4,000 and 5,000 feet above sea level. Seward district, Alaska Gulf region, Alaska. 1904. Plate 5-A in U.S. Geological Survey. Bulletin 277. 1906. #1:/Alaska-Bulletin 277/mfh00131 ID. Moffit, F.H. 131 Panoramic view from head of Resurrection Creek, looking east and south, photographs are taken from an elevation of 5,000 feet and show the accordance of summits in the Kenai Mountains. The average elevation is between 4,000 and 5,000 feet above sea level. Seward district, Alaska Gulf region, Alaska. 1904. Plate 5-B in U.S. Geological Survey. Bulletin 277. 1906. #1:/Alaska-Bulletin 277/mfh00132 ID. Moffit, F.H. 132 Panoramic view from head of Resurrection Creek, looking east and south, photographs are taken from an elevation of 5,000 feet and show the accordance of summits in the Kenai Mountains. The average elevation is between 4,000 and 5,000 feet above sea level. Seward district, Alaska Gulf region, Alaska. 1904. Plate 5-B in U.S. Geological Survey. Bulletin 277. 1906. #1:/Alaska-Bulletin 587/mfh00136 ID. Moffit, F.H. 136 Bench gravels on Resurrection Creek. Hope district, Cook Inlet region, Alaska. July 1904. Plate 26-A in U.S. Geological Survey. Bulletin 587. 1915. #1:/Alaska-Bulletin 277/mfh00140 ID. Moffit, F.H. 140 Lower end of Palmer creek, showing the deep rock canyon with gravel capped walls. Seldovia district, Cook Inlet region, Alaska. 1904. Plate 8-B in U.S. Geological Survey. Bulletin 277. 1906. #1:/Alaska-Bulletin 277/mfh00144 ID. Moffit, F.H. 144 Canyon of Palmer creek, high gravel bench on the left. Seldovia district, Cook Inlet region, Alaska. 1904. Plate 8-A in U.S. Geological Survey. Bulletin 277. 1906. #1:/Alaska-Bulletin 277/mfh00147 ID. Moffit, F.H. 147 Hydraulic mining on Palmer creek shows the method of handling boulders. Seldovia district, Cook Inlet region, Alaska. 1904. Plate 9-B in U.S. Geological Survey. Bulletin 277. 1906. #1:/Alaska-Bulletin 277/mfh00166 ID. Moffit, F.H. 166 Quartz lode on Sawmill creek shows the tunnel and the arrastre for treating gold ores. Seward district, Alaska Gulf region, Alaska. 1904. Plate 12 in U.S. Geological Survey. Bulletin 277. 1906. #1:/Alaska-Bulletin 277/mfh00173 ID. Moffit, F.H. 173 Head of Turnagain Arm at low tide, the mud flats are covered at high tide. Portage Glacier is the left and one of the small Glacier River glaciers is on the right. Hope district, Cook Inlet region, Alaska. 1904. Plate 3 in U.S. Geological Survey. Bulletin 277. 1906. #1:/Alaska-Bulletin 277/mfh00174 ID. Moffit, F.H. 174 Head of Turnagain Arm at low tide, the mud flats are covered at high tide. Portage Glacier is the left and one of the small Glacier River glaciers is on the right. Hope district, Cook Inlet region, Alaska. 1904. Plate 3 in U.S. Geological Survey. Bulletin 277. 1906. #1:/Alaska-Bulletin 277/mfh00187 ID. Moffit, F.H. 187 Canyon and falls near the lower end of Crow creek, such features characterize the lower portion of most streams on the Kenai Peninsula. Seward district, Alaska Gulf region, Alaska. 1904. Plate 11-B in U.S. Geological Survey. Bulletin 277. 1906. #1:/Alaska-Bulletin 277/mfh00191 ID. Moffit, F.H. 191 Crow creek just above the canyon, shows stone boat and wheel, run by the "giant," used in removing boulders. Seward district, Alaska Gulf region, Alaska. 1904. Plate 11-A in U.S. Geological Survey. Bulletin 277. 1906. #1:/Alaska-Bulletin 587/mfh00198 ID. Moffit, F.H. 198 Pick and shovel work at "The Forks" of East Fork and Canyon Creek. Seward district, Alaska Gulf region, Alaska. 1904. Plate 34-A in U.S. Geological Survey. Bulletin 587. 1915. #1:/Alaska-Bulletin 277/mfh00205 ID. Moffit, F.H. 205 Contorted cherts at Seldovia bay: cherts in the middle of the picture, diabase on the right. Seldovia district, Cook Inlet region, Alaska. 1904. Plate 4-B in U.S. Geological Survey. Bulletin 277. 1906. #1:/Alaska-Bulletin 533/mfh00221 ID. Moffit, F.H. 221 Channel cut by a stream flowing along the edge of the glacier that formerly occupied Stewart River valley. Nome district, Seward Peninsula region, Alaska. 1905. Plate 12-A in U.S. Geological Survey. Bulletin 533. 1913. #1:/Alaska-Bulletin 533/mfh00225 ID. Moffit, F.H. 225 Topography of Kigluaik Mountains; Cobblestone River on the left; Windy Creek near the center, with Mount Osborn at its head. Nome district, Seward Peninsula region, Alaska. 1905. Plate 10-A in U.S. Geological Survey. Bulletin 533. 1913. #1:/Alaska-Bulletin 533/mfh00226 ID. Moffit, F.H. 226 Topography of Kigluaik Mountains; Cobblestone River on the left; Windy Creek near the center, with Mount Osborn at its head. Nome district, Seward Peninsula region, Alaska. 1905. Plate 10-A in U.S. Geological Survey. Bulletin 533. 1913. #1:/Alaska-Bulletin 533/mfh00227 ID. Moffit, F.H. 227 Topography of Kigluaik Mountains; Cobblestone River on the left; Windy Creek near the center, with Mount Osborn at its head. Nome district, Seward Peninsula region, Alaska. 1905. Plate 10-A in U.S. Geological Survey. Bulletin 533. 1913. #1:/Alaska-Bulletin 533/mfh00228 ID. Moffit, F.H. 228 Topography of Kigluaik Mountains; Cobblestone River on the left; Windy Creek near the center, with Mount Osborn at its head. Nome district, Seward Peninsula region, Alaska. 1905. Plate 10-A in U.S. Geological Survey. Bulletin 533. 1913. #1:/Alaska-Bulletin 533/mfh00233 ID. Moffit, F.H. 233 Glacial cirque 1 mile west of pass between Windy Creek and Cobblestone River. Nome district, Seward Peninsula region, Alaska. 1905. Plate 4-B in U.S. Geological Survey. Bulletin 533. 1913. #1:/Alaska-Bulletin 533/mfh00236 ID. Moffit, F.H. 236 Glacial cirque 1 mile west of pass between Windy Creek and Cobblestone River. Nome district, Seward Peninsula region, Alaska. 1905. Plate 4-B in U.S. Geological Survey. Bulletin 533. 1913. #1:/Alaska-Bulletin 533/mfh00239 ID. Moffit, F.H. 239 Northward from Nome across the tundra, Anvil Mountain in the distance 4 miles away. Nome district, Seward Peninsula region, Alaska. 1905. Plate 4-A in U.S. Geological Survey. Bulletin 533. 1913. #1:/Alaska-Bulletin 533/mfh00249 ID. Moffit, F.H. 249 Granite sills in the southward dipping biotite schist of Thompson Creek. Nome district, Seward Peninsula region, Alaska. 1905. Plate 8-B in U.S. Geological Survey. Bulletin 533. 1913. #1:/Alaska-Bulletin 533/mfh00252 ID. Moffit, F.H. 252 Small cirque on south side of Thompson Creek valley, 500 feet above the stream. The rock rim across the front ranges in height from 5 to 15 feet, but has been cut through by running water. Nome district, Seward Peninsula region, Alaska. 1905. Plate 12-B in U.S. Geological Survey. Bulletin 533. 1913. #1:/Alaska-Bulletin 533/mfh00266 ID. Moffit, F.H. 266 Glacial cirque on east side of Mount Osborn, the lower half of the mountain is gneiss, which is overlain by limestone with interbedded schist or gneiss. A few hundred feet of biotite schist caps the mountain. Nome district, Seward Peninsula region, Alaska. 1905. Plate 11 in U.S. Geological Survey. Bulletin 533. 1913 #1:/Alaska-Bulletin 533/mfh00267 ID. Moffit, F.H. 267 Glacial cirque on east side of Mount Osborn, the lower half of the mountain is gneiss, which is overlain by limestone with interbedded schist or gneiss. A few hundred feet of biotite schist caps the mountain. Nome district, Seward Peninsula region, Alaska. 1905. Plate 11 in U.S. Geological Survey. Bulletin 533. 1913 #1:/Alaska-Bulletin 533/mfh00268 ID. Moffit, F.H. 268 Glacial cirque on east side of Mount Osborn, the lower half of the mountain is gneiss, which is overlain by limestone with interbedded schist or gneiss. A few hundred feet of biotite schist caps the mountain. Nome district, Seward Peninsula region, Alaska. 1905. Plate 11 in U.S. Geological Survey. Bulletin 533. 1913 #1:/Alaska-Bulletin 533/mfh00269 ID. Moffit, F.H. 269 Glacial cirque on east side of Mount Osborn, the lower half of the mountain is gneiss, which is overlain by limestone with interbedded schist or gneiss. A few hundred feet of biotite schist caps the mountain. Nome district, Seward Peninsula region, Alaska. 1905. Plate 11 in U.S. Geological Survey. Bulletin 533. 1913 #1:/Alaska-Bulletin 533/mfh00270 ID. Moffit, F.H. 270 Characteristic rugged ridge in the Kigluaik Mountains, northeast from saddle at head of East Fork of Grand Central River. Nome district, Seward Peninsula region, Alaska. 1905. Plate 8-A in U.S. Geological Survey. Bulletin 533. 1913. #1:/Alaska-Bulletin 374/mfh00282 ID. Moffit, F.H. 282 Chitistone limestone, north side of Elliott creek near Deception creek: Nikolai greenstone below; Kennicott limestone above. Chitina district, Copper River district, Alaska. 1907. Plate 7-B in U.S. Geological Survey. Bulletin 374. 1909. Plate 11-A in U.S. Geological Survey. Bulletin 745. 1923. #1:/Alaska-Bulletin 374/mfh00288 ID. Moffit, F.H. 288 Thin bedded Triassic limestone and shale on west branch of Rock creek, in the Kotsina River valley. Chitina district, Copper River district, Alaska. 1907. Plate 4-A in U.S. Geological Survey. Bulletin 374. 1909; Plate 8-B in U.S. Geological Survey. Bulletin 894. 1938. #1:/Alaska Glaciers-Moffit Collection/mfh00302 ID. Moffit, F.H. 302 Small glacier southwest from Tiekel River mouth. Valdez district, Alaska Gulf region, Alaska. 1905. #1:/Alaska Glaciers Moffit Collection/mfh00303 ID. Moffit, F.H. 303 Steamer "Chitina" on the Copper river. Copper River region, Bremner district, Alaska. 1905. #1:/Alaska Glaciers Moffit Collection/mfh00304 ID. Moffit, F.H. 304 Copper River at lead of Abercrombie Rapids, looking north. Copper River region, Tasnuna district, Alaska. 1905. #1:/Alaska Glaciers Moffit Collection/mfh00305 ID. Moffit, F.H. 305 Small glacier at foot of Abercrombie Rapids, west side of Copper River. Copper River region, Tasnuna district, Alaska. 1905. #1:/Alaska Glaciers Moffit Collection/mfh00306 ID. Moffit, F.H. 306 Miles Glacier, panorama with Photo No. mfh00307. Copper River region, Tasnuna district, Alaska. 1905. #1:/Alaska Glaciers Moffit Collection/mfh00307 ID. Moffit, F.H. 307 Miles Glacier, panorama with Photo No. mfh00306. Copper River region, Tasnuna district, Alaska. 1905. #1:/Alaska Glaciers Moffit Collection/mfh00308 ID. Moffit, F.H. 308 Miles Glacier, panorama with Photo No. mfh00306 and mfh00307. Copper River region, Tasnuna district, Alaska. 1905. #1:/Alaska Glaciers Moffit Collection/mfh00309 ID. Moffit, F.H. 309 Miles Glacier. Copper River region, Tasnuna district, Alaska. 1905. #1:/Alaska-Bulletin 417/mfh00322 ID. Moffit, F.H. 322 Volcanic ash interbedded with peat, north side of White River near North Fork. Chitina district, Copper River region, Alaska. 1908. Plate 5-A in U.S. Geological Survey. Bulletin 417. 1910. #1:/Alaska-Bulletin 630/mfh00323 ID. Moffit, F.H. 323 Bluff of White River near mouth of North Fork, showing peat and volcanic ash. Blocks in foreground are overturned. Plate 14-A in U.S. Geological Survey. Bulletin 630. 1916 Plate 11-A in U.S. Bulletin 894. 1938. #1:/Alaska-Bulletin 417/mfh00332 ID. Moffit, F.H. 332 Volcanic ash, lower slopes of mountains near Mount Natazhat. Chitina district, Copper River region, Alaska. 1908. Plate 5-B in U.S. Geological Survey. Bulletin 417. 1910. #1:/Alaska Glaciers Moffit Collection/mfh00335 ID. Moffit, F.H. 335 Looking south and east across debris-covered Russell glacier, eastern end, in Skolai Pass. Copper River region, Nizina district, Alaska. 1905. #1:/Alaska Glaciers Moffit Collection/mfh00337 ID. Moffit, F.H. 337 Small glacier and caselt-like peaks, south side of Skolai Creek, above Frederika Glacier. Copper River region, Nizina district, Alaska. 1905. #1:/Alaska Glaciers Moffit Collection/mfh00338 ID. Moffit, F.H. 338 Terminus of Frederika Glacier. This glacier in 1891 terminated in an ice-cliff 250 feet high. Copper River region, Nizina district, Alaska. 1905. Published as Fig. 13, Journal of Geology, vol. 18, No. 1, p.55. 1910. #1:/Alaska-Bulletin 417/mfh00342 ID. Moffit, F.H. 342 West end of Russell Glacier at head of Skolai Creek. Chitina district, Copper River region, Alaska. 1908. Plate 4-A in U.S. Geological Survey. Bulletin 417. 1910. #1:/Alaska Glaciers Moffit Collection/mfh00355 ID. Moffit, F.H. 355 Mount Blackburn, looking up Kushulana River. Copper River region, Nizina district, Alaska. 1905. #1:/Alaska Glaciers Moffit Collection/mfh00356 ID. Moffit, F.H. 356 Pot hole of the Kennicott Glacier. See Photo No. mfh00293 and mfh00372. Copper River region, Nizina district, Alaska. 1905. #1:/Alaska-Bulletin 448/mfh00359 ID. Moffit, F.H. 359 West side of ridge at Bonanza mine, the richest ore exposed on the surface is on the top and face of ridge. Chitina district, Copper River region, Alaska. 1908. Plate 12 in U.S. Geological Survey. 448. 1911. #1:/Alaska-Bulletin 448/mfh00360 ID. Moffit, F.H. 360 West side of ridge at Bonanza mine, the richest ore exposed on the surface is on the top and face of ridge. Chitina district, Copper River region, Alaska. 1908. Plate 12 in U.S. Geological Survey. 448. 1911. #1:/Alaska-Bulletin 448/mfh00361 ID. Moffit, F.H. 361 West side of ridge at Bonanza mine, the richest ore exposed on the surface is on the top and face of ridge. Chitina district, Copper River region, Alaska. 1908. Plate 12 in U.S. Geological Survey. 448. 1911. #1:/Alaska-Bulletin 448/mfh00373 ID. Moffit, F.H. 373 Porphyritic intrusions in black shale of Kennicott formation on McCarthy creek. Chitina district, Copper River region, Alaska. 1908. Plate 11-B in U.S. Geological Survey. 448. 1911. #1:/Alaska-Bulletin 448/mfh00376 ID. Moffit, F.H. 376 Unconformity between Triassic and Jurassic formations t head of Nikolai creek; the two views placed side by side would form a panorama. Chitina district, Copper River region, Alaska. 1908. Plate 7-A and 7-B respectively, in U.S. Geological Survey. 448. 1911. #1:/Alaska-Bulletin 448/mfh00377 ID. Moffit, F.H. 377 Unconformity between Triassic and Jurassic formations t head of Nikolai creek; the two views placed side by side would form a panorama. Chitina district, Copper River region, Alaska. 1908. Plate 7-A and 7-B respectively, in U.S. Geological Survey. 448. 1911 #1:/Alaska-Bulletin 448/mfh00379 ID. Moffit, F.H. 379 Rock glacier on McCarthy Creek three-quarters of a mile above the mouth of East Fork, showing the source of supply in the talus cones, above, also the surface markings- longitudinal in the upper portion, concentric below. Nizina district, Copper River region, Alaska. Plate 8 in U.S. Geological Survey. Bulletin 448. 1911; plate 3 in U.S. Geological Survey. Bulletin 894. 1938. #1:/Alaska-Bulletin 448/mfh00387 ID. Moffit, F.H. 387 Talus cones on east side of McCarthy Creek, at base of limestone cliffs. Chitina district, Copper River region, Alaska. 1908. Plate 4-A in U.S. Geological Survey. 448. 1911. #1:/Alaska-Bulletin 448/mfh00391 ID. Moffit, F.H. 391 Rock glacier in a tributary of McCarthy creek northeast of Bonanza mine, at the mouth of its hanging valley it breaks down into a great talus cone. Chitina district, Copper River region, Alaska. 1908. Plate 10-A in U.S. Geological Survey. 448. 1911. #1:/Alaska-Bulletin 448/mfh00395 ID. Moffit, F.H. 395 Limestone wall on west side of Nizina River near mouth of Chitistone River, the limestone overlies the Nikolai greenstone on the left. Chitina district, Copper River region, Alaska. 1908. Plate 5 in U.S. Geological Survey. 448. 1911. #1:/Alaska-Bulletin 448/mfh00396 ID. Moffit, F.H. 396 Limestone wall on west side of Nizina River near mouth of Chitistone River, the limestone overlies the Nikolai greenstone on the left. Chitina district, Copper River region, Alaska. 1908. Plate 5 in U.S. Geological Survey. 448. 1911. #1:/Alaska-Bulletin 448/mfh00397 ID. Moffit, F.H. 397 Limestone wall on west side of Nizina River near mouth of Chitistone River, the limestone overlies the Nikolai greenstone on the left. Chitina district, Copper River region, Alaska. 1908. Plate 5 in U.S. Geological Survey. 448. 1911. #1:/Alaska-Bulletin 448/mfh00405 ID. Moffit, F.H. 405 Folded Triassic limestone and shale beds on southwest side of Copper Creek. Chitina district, Copper River region, Alaska. 1908. Plate 4-B in U.S. Geological Survey. 448. 1911. Plate 11-B in U.S. Geological Survey. Bulletin 894. 1938. #1:/Alaska-Bulletin 498/mfh00428 ID. Moffit, F.H. 428 Alaska Glaciers. View across Gulkana Glacier from west side, shows a type of Alaska range topography. Sanford district, Copper River region, Alaska. 1910. Plate 7-A in U.S. Geological Survey. Bulletin 498. 1912. #1:/Alaska-Bulletin 498/mfh00429 ID. Moffit, F.H. 429 Alaska Glaciers. View across Gulkana Glacier from west side, shows a type of Alaska range topography. Sanford district, Copper River region, Alaska. 1910. Plate 7-A in U.S. Geological Survey. Bulletin 498. 1912. #1:/Alaska-Bulletin 498/mfh00430 ID. Moffit, F.H. 430 Alaska Glaciers. View across Gulkana Glacier from west side, shows a type of Alaska range topography. Sanford district, Copper River region, Alaska. 1910. Plate 7-A in U.S. Geological Survey. Bulletin 498. 1912. #1:/Alaska-Bulletin 498/mfh00434 ID. Moffit, F.H. 434 Tertiary conglomerate and sands on a tributary of Phelan Creek. Copper River region, Alaska. 1910. Plate 9-A in U.S. Geological Survey. Bulletin 498. 1912 #1:/Alaska-Bulletin 498/mfh00440 ID. Moffit, F.H. 440 Landslide on northern tributary of Eureka Creek, Copper River region, Alaska. 1910. Plate 4-A in U.S. Geological Survey. Bulletin 498. 1912. #1:/Alaska-Bulletin 498/mfh00442 ID. Moffit, F.H. 442 Conglomerate associated with Triassic sediments between Roosevelt Lakes and Big Clearwater Creek. Gulkana district, Copper River region, Alaska. 1910. Plate 4-B in U.S. Geological Survey. Bulletin 498. 1912. #1:/Alaska-Bulletin 498/mfh00445 ID. Moffit, F.H. 445 Basalt Mountains on the south side of Windy Creek. Gulkana district, Copper River region, Alaska. 1910. Plate 5-A in U.S. Geological Survey. Bulletin 498. 1912. #1:/Alaska-Bulletin 498/mfh00446 ID. Moffit, F.H. 446 Basalt Mountains on the south side of Windy Creek. Gulkana district, Copper River region, Alaska. 1910. Plate 5-A in U.S. Geological Survey. Bulletin 498. 1912. #1:/Alaska-Bulletin 498/mfh00450 ID. Moffit, F.H. 450 Soil flows at head of Valdez Creek. Copper River region, Alaska. 1910. Plate 6-B in U.S. Geological Survey. Bulletin 498. 1912. #1:/Alaska-Bulletin 498/mfh00455 ID. Moffit, F.H. 455 Gold nuggets from Lucky Gulch. Valdez Creek district, Cook Inlet region, Alaska. 1910. Plate 10-A in U.S. Geological Survey. Bulletin 498. 1912. #1:/Alaska-Bulletin 498/mfh00458 ID. Moffit, F.H. 458 Rock glacier on Big Rusty Creek. Copper River region, Alaska. 1910. Plate 6-A in U.S. Geological Survey. Bulletin 498. 1912. #1:/Alaska-Bulletin 498/mfh00459 ID. Moffit, F.H. 459 Upper valleys of White and Big Rusty Creeks. Copper River region, Alaska. 1910. Plate 5-B in U.S. Geological Survey. Bulletin 498. 1912. #1:/Alaska-Bulletin 498/mfh00460 ID. Moffit, F.H. 460 Upper valleys of White and Big Rusty Creeks. Copper River region, Alaska. 1910. Plate 5-B in U.S. Geological Survey. Bulletin 498. 1912. #1:/Alaska-Bulletin 498/mfh00468 ID. Moffit, F.H. 468 Boulders from stream gravel on Valdez Creek. Valdez Creek district, Cook Inlet region, Alaska. 1910. Plate 8-A in U.S. Geological Survey. Bulletin 498. 1912. #1:/Alaska-Bulletin 498/mfh00473 ID. Moffit, F.H. 473 The Monahan Tunnel and Second Creek claim above Discovery, on Valdez Creek. Valdez Creek district, Cook Inlet region, Alaska. 1910. Plate 9-B in U.S. Geological Survey. Bulletin 498. 1912. #1:/Alaska-Bulletin 498/mfh00477 ID. Moffit, F.H. 477 Showing the topography of lower Valdez Creek valley from the north. Copper River region, Alaska. 1910. Plate 7-B in U.S. Geological Survey. Bulletin 498. 1912. #1:/Alaska-Bulletin 498/mfh00478 ID. Moffit, F.H. 478 Showing the topography of lower Valdez Creek valley from the north. Copper River region, Alaska. 1910. Plate 7-B in U.S. Geological Survey. Bulletin 498. 1912. #1:/Alaska-Bulletin 498/mfh00479 ID. Moffit, F.H. 479 Showing the topography of lower Valdez Creek valley from the north. Copper River region, Alaska. 1910. Plate 7-B in U.S. Geological Survey. Bulletin 498. 1912. #1:/Alaska-Bulletin 498/mfh00484 ID. Moffit, F.H. 484 Boomer and dam on Rusty Creek. Valdez Creek district, Cook Inlet region, Alaska. 1910. Plate 10-B in U.S. Geological Survey. Bulletin 498. 1912 #1:/Alaska-Bulletin 576/mfh00494 ID. Moffit, F.H. 494 Top of ridge between Hanagita valley and Chitina River. Elevation nearly 6,000 feet. These mountains were overridden by the great glacier of Chitina Valley, Mount Blackburn, 35 miles to the northeast in the background. Bremner district, Copper River region, Alaska. 1911. Plate 4-A in U.S. Geological Survey. Bulletin 576. 1914. #1:/Alaska-Bulletin 576/mfh00496 ID. Moffit, F.H. 496 Boulder of gneiss on Tebay River, the altered sediments are here intimately intruded by dioritic rocks. Bremner district, Copper River region, Alaska. 1911. Plate 4-C in U.S. Geological Survey. Bulletin 576. 1914. #1:/Alaska-Bulletin 576/mfh00497 ID. Moffit, F.H. 497 Southward across Tebay Lake, glaciation shown by the rounded knobs (roches moutonness) of the valley floor and the truncated spurs. On the extreme is the valley of Little Bremner River. Bremner district, Copper River region, Alaska. 1911. Plate 3-B in U.S. Geological Survey. Bulletin 576. 1914. #1:/Alaska-Bulletin 576/mfh00498 ID. Moffit, F.H. 498 Southward across Tebay Lake, glaciation shown by the rounded knobs (roches moutonness) of the valley floor and the truncated spurs. On the extreme is the valley of Little Bremner River. Bremner district, Copper River region, Alaska. 1911. Plate 3-B in U.S. Geological Survey. Bulletin 576. 1914. #1:/Alaska-Bulletin 576/mfh00499 ID. Moffit, F.H. 499 Eastward in Hangita valley from Sangaina Creek, the glaciation of the valley is evident. Bremner district, Copper River region, Alaska. 1911. Plate 6-A in U.S. Geological Survey. Bulletin 576. 1914. #1:/Alaska-Bulletin 576/mfh00502 ID. Moffit, F.H. 502 Hanging valley on south side of Hanagita valley near head of Hanagita Creek. Bremner district, Copper River region, Alaska. 1911. Plate 6-B in U.S. Geological Survey. Bulletin 576. 1914. #1:/Alaska-Bulletin 576/mfh00503 ID. Moffit, F.H. 503 East end of Hanagita valley, Klu River flows northeastward on the left side of the mountain in middle of picture. Moraine that crosses the valley is see on the left side of picture. Bremner district, Copper River region, Alaska. 1911. Plate 5 in U.S. Geological Survey. Bulletin 576. 1914. #1:/Alaska-Bulletin 576/mfh00504 ID. Moffit, F.H. 504 East end of Hanagita valley, Klu River flows northeastward on the left side of the mountain in middle of picture. Moraine that crosses the valley is see on the left side of picture. Bremner district, Copper River region, Alaska. 1911. Plate 5 in U.S. Geological Survey. Bulletin 576. 1914. #1:/Alaska-Bulletin 576/mfh00527 ID. Moffit, F.H. 527 Eastward across Copper River from ridge east of Chitina. Shows high gravel banks at the mouth of Chitina River and broad flood plains of Copper and Chitina Rivers. Mount Blackburn in the distance. Bremner district, Copper River region, Alaska. 1911. Plate 3- A in U.S. Geological Survey. Bulletin 576. 1914. #1:/Alaska-Bulletin 576/mfh00528 ID. Moffit, F.H. 528 Eastward across Copper River from ridge east of Chitina. Shows high gravel banks at the mouth of Chitina River and broad flood plains of Copper and Chitina Rivers. Mount Blackburn in the distance. Bremner district, Copper River region, Alaska. 1911. Plate 3- A in U.S. Geological Survey. Bulletin 576. 1914. #1:/Alaska-Bulletin 576/mfh00529 ID. Moffit, F.H. 529 Eastward across Copper River from ridge east of Chitina. Shows high gravel banks at the mouth of Chitina River and broad flood plains of Copper and Chitina Rivers. Mount Blackburn in the distance. Bremner district, Copper River region, Alaska. 1911. Plate 3- A in U.S. Geological Survey. Bulletin 576. 1914. #1:/Alaska-Bulletin 608/mfh00553 ID. Moffit, F.H. 553 South Wall of Broad Pass viewed from the bars of Jack River, shows truncated spur produces by glaciation. Nenana district, Yukon region, Alaska. 1913. Plate 7-A in U.S. Geological Survey. Bulletin 608. 1915. #1:/Alaska-Bulletin 608/mfh00554 ID. Moffit, F.H. 554 South Wall of Broad Pass viewed from the bars of Jack River, shows truncated spur produces by glaciation. Nenana district, Yukon region, Alaska. 1913. Plate 7-A in U.S. Geological Survey. Bulletin 608. 1915. #1:/Alaska-Bulletin 608/mfh00555 ID. Moffit, F.H. 555 Across Jack River, show the northward course of the Nenana River through the Alaska Range. Nenana district, Yukon region, Alaska. 1913. Plate 7-B in U.S. Geological Survey. Bulletin 608. 1915. #1:/Alaska-Bulletin 608/mfh00556 ID. Moffit, F.H. 556 Across Jack River, show the northward course of the Nenana River through the Alaska Range. Nenana district, Yukon region, Alaska. 1913. Plate 7-B in U.S. Geological Survey. Bulletin 608. 1915. #1:/Alaska-Bulletin 745/mfh00581 ID. Moffit, F.H. 581 Looking down Rock Creek and across Kotsina River, on the right the Chitistone limestone overlies the Nikolai greenstone. In the distant mountain on the left the limestone is repeated by faulting. Valdez district, Alaska Gulf region, Alaska. 1914. Plate 12-A in U.S. Geological Survey. Bulletin 745. 1923. #1:/Alaska-Bulletin 745/mfh00590 ID. Moffit, F.H. 590 Mount Wrangell from the mountains west of Kluvesna River. Mount Drum on the extreme left. Taken from an altitude of about 6,000 feet. Valdez district, Alaska Gulf region, Alaska. 1914. Plate 6 in U.S. Geological Survey. Bulletin 745. 1923. #1:/Alaska-Bulletin 745/mfh00591 ID. Moffit, F.H. 591 Mount Wrangell from the mountains west of Kluvesna River. Mount Drum on the extreme left. Taken from an altitude of about 6,000 feet. Valdez district, Alaska Gulf region, Alaska. 1914. Plate 6 in U.S. Geological Survey. Bulletin 745. 1923. #1:/Alaska-Bulletin 745/mfh00593 ID. Moffit, F.H. 593 Nearer view of the distant mountain shown in Moffit 581, the Chitistone limestone is overlain by Triassic shale, and this is in turn by conglomerate. Valdez district, Alaska Gulf region, Alaska. 1914. Plate 12-B in U.S. Geological Survey. Bulletin 745. 1923. #1:/Alaska-Bulletin 745/mfh00595 ID. Moffit, F.H. 595 Head of Kuskulana River, showing the moraine covered terminus of the glacier and the bedded character of the Nikolai greenstone partly snow covered. Valdez district, Alaska Gulf region, Alaska. 1914. Plate 16-A in U.S. Geological Survey. Bulletin 745. 1923. #1:/Alaska-Bulletin 745/mfh00596 ID. Moffit, F.H. 596 "Soil flows" on the south side of Slatka Creek. The mountain slope is covered with small angular fragments of light-colored igneous rock. Valdez district, Alaska Gulf region, Alaska. 1914. Plate 16-B in U.S. Geological Survey. Bulletin 745. 1923. #1:/Alaska-Bulletin 745/mfh00653 ID. Moffit, F.H. 653 Looking down Rock Creek and across Kotsina River, on the right side the Chitistone limestone overlies the Nikolai greenstone. In the distant mountain on the left the limestone is repeated by faulting. Valdez district, Alaska Gulf region, Alaska. 1914. Plate 12-A in U.S. Geological Survey. Bulletin 745. 1923. #1:/Alaska-Bulletin 745/mfh00661 ID. Moffit, F.H. 661 Nearer view of mountain shown in Moffit 653, the Chitistone limestone is overlain by Triassic shale, and this in turn by conglomerate. Valdez district, Alaska Gulf region, Alaska. 1914. Plate 15-B in U.S. Geological Survey. Bulletin 745. 1923. #1:/Alaska-Bulletin 745/mfh00663 ID. Moffit, F.H. 663 "Rock Glacier" between Rock and Roaring Creeks on the south side of Kotsina River. Valdez district, Alaska Gulf region, Alaska. 1914. Plate 14-A in U.S. Geological Survey. Bulletin 745. 1923. #1:/Alaska-Bulletin 657/mfh00723 ID. Moffit, F.H. 723 Telescopic micrometer alidade and plane table. Alaska. 1910. Plate 5-B in U.S. Geological Survey. Bulletin 657. 1917. #1:/Alaska-Bulletin 657/mfh00724 ID. Moffit, F.H. 724 Panoramic camera used by the Alaska Mineral Resources division. Alaska. 1910. Plate 3 in U.S. Geological Survey. Bulletin 657. 1917. #1:/Alaska-Bulletin 657/mfh00725 ID. Moffit, F.H. 725 Panoramic photo-alidade. Alaska. 1910. Plate 8 in U.S. Geological Survey. Bulletin 657. 1917. #1:/Alaska Glaciers Moffit Collection/mfh00973 ID. Moffit, F.H. 973 Westward dupping greywacke and slate of the Valdez group in Nassau Fiord. Alaska Gulf region, Latouche district, Alaska. 1924. Published as Fig. 49, U.S. Geological Survey Bulletin 989-E. 1954. #1:/Alaska Glaciers Moffit Collection/mfh00974 ID. Moffit, F.H. 974 Chenaga Glacier. Alaska Gulf region, Latouche district, Alaska. 1924. #1:/Alaska Glaciers Moffit Collection/mfh00975 ID. Moffit, F.H. 975 Chenega Glacier. Mr. Brooks and Earl C. Hunter in the foreground. Alaska Gulf region, Latouche district, Alaska. 1924. #1:/Alaska Glaciers Moffit Collection/mfh00976 ID. Moffit, F.H. 976 Chenaga Glacier. Mr. Brooks and Earl C. Hunter in the foreground (USGS party members). Alaska Gulf region, Latouche district, Alaska. 1924. #1:/Alaska Glaciers Moffit Collection/mfh00977 ID. Moffit, F.H. 977 Alaska Glaciers. Chenega Glacier, which is on the Kenai Peninsula west of Chenega in the Chugach Mountains, viewed from the east side of Nassau Fiord. The view shows westward dipping beds and glaciated surfaces of the greywacke and slate of the Valdez group; the glacier discharging into the fiord; and the lack of timber, which has not had time to become established since the ice retreated from the bay. Figure 67, U.S. Geological Survey Bulletin 989-E. 1954. #1:/Alaska Glaciers Moffit Collection/mfh00978 ID. Moffit, F.H. 978 Columbia Glacier from near Emeral Cove. Alaska Gulf region, Latouche district, Alaska. 1924. #1:/Alaska Glaciers Moffit Collection/mfh00981 ID. Moffit, F.H. 981 The "Virginia of Cordova" at anchor in Emerald Bay. (also Columbia Glacier Bay). Alaska Gulf region, Cordova district, Alaska. 1924. #1:/Alaska Glaciers Moffit Collection/mfh00982 ID. Moffit, F.H. 982 Chenega Glacier. Alaska Gulf region, Latouch district, Alaska. 1924. #1:/Alaska Glaciers Moffit Collection/mfh00989 ID. Moffit, F.H. 989 Taylor Glacier in Port Nellie Juan. Alaska Gulf region, Cordova district, Alaska. 1925. #1:/Alaska Glaciers Moffit Collection/mfh00990 ID. Moffit, F.H. 990 Cottrell Glacier in Port Nellie Juan. Alaska Gulf region, Cordova district, Alaska. 1925. #1:/Alaska Glaciers Moffit Collection/mfh00991 ID. Moffit, F.H. 991 Falling Glacier on the east side of upper Port Nellie Juan. Alaska Gulf region, Cordova district, Alaska. 1925. #1:/Alaska Glaciers Moffit Collection/mfh01013 ID. Moffit, F.H. 1013 Kings Glacier, view from the beach near Clermont Glacier, in Port Nellie Juan. Alaska Gulf region, Cordova district, Alaska. 1925. #1:/Alaska Glaciers Moffit Collection/mfh01014 ID. Moffit, F.H. 1014 Falling Glacier from beach near Clermont Glacier, Port Nellie Juan. Alaska Gulf region, Cordova district, Alaska. 1925. #1:/Alaska Glaciers Moffit Collection/mfh01016 ID. Moffit, F.H. 1016 The front of Taylor Glacier on Port Nellie Juan. Alaska Gulf region, Cordova district, Alaska. 1925. #1:/Alaska Glaciers Moffit Collection/mfh01017 ID. Moffit, F.H. 1017 Contact Glacier in Port Nellie Juan. Alaska Gulf region, Cordova district, Alaska. 1925. #1:/Alaska Glaciers Moffit Collection/mfh01018 ID. Moffit, F.H. 1018 Granite slope, east side of Contact Glacier in Port Nellie Juan. Alaska Gulf region, Cordova district, Alaska. 1925. #1:/Alaska Glaciers Moffit Collection/mfh01019 ID. Moffit, F.H. 1019 Nellie Juan Glacier. From north high point of small hill, west side of glacier front. Alaska Gulf region, Cordova district, Alaska. 1925. #1:/Alaska Glaciers Moffit Collection/mfh01020 ID. Moffit, F.H. 1020 Nellie Juan Glacier, from north high point of small hill on west side of glacier front. Alaska Gulf region, Cordova district, Alaska. 1925. #1:/Alaska Glaciers Moffit Collection/mfh01021 ID. Moffit, F.H. 1021 Nellie Juan Glacier, from south, high point of small hill on west side of glacier front. Alaska Gulf region, Cordova district, Alaska. 1925. #1:/Alaska Glaciers Moffit Collection/mfh01022 ID. Moffit, F.H. 1022 Nellie Juan Glacier, from south, high point of small hill on west side of glacier front. Alaska Gulf region, Cordova district, Alaska. 1925. #1:/Alaska Glaciers Moffit Collection/mfh01023 ID. Moffit, F.H. 1023 Nellie Juan Glacier, south, high point of small hill on west side of glacier front. Alaska Gulf region, Cordova district, Alaska. 1925. #1:/Alaska Glaciers Moffit Collection/mfh01024 ID. Moffit, F.H. 1024 West side of Nellie Juan Glacier, south, from small hill on west side of glacier front. Alaska Gulf region, Cordova district, Alaska. 1925. #1:/Alaska Glaciers Moffit Collection/mfh01025 ID. Moffit, F.H. 1025 Down Nellie Juan Glacier Bay, small hill on west side location. Alaska Gulf region, Cordova district, Alaska. 1925. #1:/Alaska Glaciers Moffit Collection/mfh01027 ID. Moffit, F.H. 1027 Nellie Juan Glacier from cove on east side of Nellie Juan Bay. Alaska Gulf region, Cordova district, Alaska. 1925. #1:/Alaska Glaciers Moffit Collection/mfh01032 ID. Moffit, F.H. 1032 View of upper McCarthy Creek Valley, showing instrusives and bedded volcanics. Copper River region, Alaska. 1927. #1:/Alaska Glaciers Moffit Collection/mfh01033 ID. Moffit, F.H. 1033 View of upper McCarthy Creek Valley, showing the East Glacier and bedded volcanics. Panorama with Photo Nos. mfh01030, mfh01031, mfh01032. Copper River region, Alaska. 1927. #1:/Alaska Glaciers Moffit Collection/mfh01034 ID. Moffit, F.H. 1034 East Glacier of McCarthy Creek. Copper River region, Alaska. 1927. #1:/Alaska Glaciers Moffit Collection/mfh01035 ID. Moffit, F.H. 1035 Bedded volcanics and East Glacier of McCarthy Creek. Copper River region, Alaska. 1927. #1:/Alaska Glaciers Moffit Collection/mfh01042 ID. Moffit, F.H. 1042 Dike in bedded volcanics at the head of Skolai Creek near Russel Glacier. Copper River region, Alaska. 1927. #1:/Alaska Glaciers Moffit Collection/mfh01043 ID. Moffit, F.H. 1043 Lake on the lower end of Flood Creek due to ponding near Russel Glacier. Copper River region, Alaska. 1927. #1:/Alaska Glaciers Moffit Collection/mfh01050 ID. Moffit, F.H. 1050 View of Russel Glacier from the first tributary glacier south of Skolai Creek. Panorama with Photo Nos. mfh01051, mfh01052. Copper River region, Alaska. 1927. #1:/Alaska Glaciers Moffit Collection/mfh01051 ID. Moffit, F.H. 1051 View of Russel Glacier from the first tributary glacier south of Skolai Creek. Panorama with Photo Nos. mfh01050, mfh01052. Copper River region, Alaska. 1927. #1:/Alaska Glaciers Moffit Collection/mfh01052 ID. Moffit, F.H. 1052 View of Russel Glacier from the first tributary glacier south of Skolai Creek. Panorama with Photo Nos. mfh01050, mfh01051. Copper River region, Alaska. 1927. #1:/Alaska Glaciers Moffit Collection/mfh01053 ID. Moffit, F.H. 1053 Castle Mountain at the head of Skolai Creek. Copper River region, Alaska. 1927. #1:/Alaska Glaciers Moffit Collection/mfh01054 ID. Moffit, F.H. 1054 View down upper Chitistone Valley from near the pass of Skolai Creek. Copper River region, Alaska. 1927. #1:/Alaska Glaciers Moffit Collection/mfh01055 ID. Moffit, F.H. 1055 Small glacier at the head of Chitistone River. Copper River region, Alaska. 1927. #1:/Alaska Glaciers Moffit Collection/mfh01058 ID. Moffit, F.H. 1058 Small Glacier on the west side of Chitistone Pass tributary to Skolai Creek. Copper River region, Alaska. 1927. #1:/Alaska Glaciers Moffit Collection/mfh01059 ID. Moffit, F.H. 1059 To show the Permian limestone outcrop overlying the volcanics on the south side of Skolai Creek near the mouth of Frederika Creek. Copper River region, Alaska. 1927. #1:/Alaska Glaciers Moffit Collection/mfh01064 ID. Moffit, F.H. 1064 View across Frederika Glacier. Copper River region, Alaska. 1927. #1:/Alaska Glaciers Moffit Collection/mfh01065 ID. Moffit, F.H. 1065 Remnant of glacial ice near the lower end of Frederika Glacier, about a quarter of a mile from the present ice front. Copper River region, Alaska. 1927. #1:/Alaska Glaciers Moffit Collection/mfh01066 ID. Moffit, F.H. 1066 Alaska Glaciers. Front of Frederica Glacier, which is northeast of McCarthy in the Wrangell Mountains. Copper River region, Alaska. 1927. #1:/Alaska Glaciers Moffit Collection/mfh01084 ID. Moffit, F.H. 1084 Mt. Regal and Lower Skolai Lake. View across Nizina Glacier. Copper River region, Alaska. 1927. #1:/Alaska Glaciers Moffit Collection/mfh01085 ID. Moffit, F.H. 1085 Permian limestone on the right. Volcanics with ash cover in the background. North side of lower Skolai Creek. Copper River region, Alaska. 1927. #1:/Alaska Glaciers Moffit Collection/mfh01096 ID. Moffit, F.H. 1096 Nizina and Rohn Glaciers. Panorama with Photo No. mfh01097. Copper River region, Alaska. 1927. #1:/Alaska Glaciers Moffit Collection/mfh01097 ID. Moffit, F.H. 1097 Mountains on the east side of Nizina Glacier. Panorama with Photo No. mfh01096. Copper River region, Alaska. 1927. #1:/Alaska Glaciers Moffit Collection/mfh01125 ID. Moffit, F.H. 1125 View across Kennicott Glacier toward Fourth of July Creek. From the pass between McCarthy Creek and National Creek. Copper River region, Alaska. 1928. #1:/Alaska Glaciers Moffit Collection/mfh01126 ID. Moffit, F.H. 1126 View across Kennicott Glacier showing Mt. Blackburn, taken from the pass betwwen McCarthy Creek and National Creek. Copper River region, Alaska. 1928. #1:/China/mwh002cp ID. Monroe, W.H. 2cp View of karst topography taken from boat on trip down the Li River south of Guilin. People in view in lower right corner; foggy day. China. October 28, 1983. #1:/China/mwh003cp ID. Monroe, W.H. 3cp View of karst topography taken from boat on trip down the Li River south of Guilin. Roof on boat visible at left. China. October 28. 1983. #1:/China/mwh00004 ID. Monroe, W.H. 4cp China. Karst topography, viewed from a boat on the Li River south of Guilin. October 28, 1983. #1:/China/mwh005cp ID. Monroe, W.H. 5cp View of karst topography taken from boat on trip down the Li River south of Guilin. Passengers and another boat visible at bottom edge. A foggy day. China. October 28, 1983. #1:/China/mwh006cp ID. Monroe, W.H. 6cp Dramatic view of karst topography taken from boat on trip down the Li River south of Guilin. River in foreground. A foggy day. China. October 28, 1983. #1:/China/mwh007cp ID. Monroe, W.H. 7cp View of passing river boat taken from boat on trip down the Li River south of Guilin. China. October 28, 1983. #1:/China/mwh008cp ID. Monroe, W.H. 8cp View of karst topography, at left, taken from boat on trip down the Li River south of Guilin. River in foreground; houses and terraced slope on far shore. A foggy day. China. October 28, 1983. #1:/China/mwh009cp ID. Monroe, W.H. 9cp View of karst topography taken from boat on trip down the Li River south of Guilin. River in foreground. A foggy day. China. October 28, 1983. #1:/China/mwh010cp ID. Monroe, W.H. 10cp View of karst topography taken from boat on trip down the Li River south of Guilin. River in foreground; a foggy day, China. October 28, 1983, #1:/China/mwh011cp ID. Monroe, W.H. 11cp View of karst topography taken from boat on trip down the Li River south of Guilin. River in foreground; a foggy day. China. October 28, 1983. #1:/China/mwh012cp ID. Monroe, W.H. 12cp View of karst topography taken from boat on trip down the Li River south of Guilin. River in foreground; a foggy day. China. October 28, 1983. #1:/China/mwh013cp ID. Monroe, W.H. 13cp A more distant view of karst topography taken from boat on trip down the Li River south of Guilin. River in foreground; a foggy day. China. October 28, 1983. #1:/China/mwh014cp ID. Monroe, W.H. 14cp Distant view of karst topography taken from boat on trip down the Li River south of Guilin. River in foreground with gravel bar, another boat beyond. A foggy day. China. October 28, 1983. #1:/China/mwh016cp ID. Monroe, W.H. 16cp View of karst topography taken from boat on trip down the Li River south of Guilin. River in foreground; another boat at left; a foggy day. China. October 28, 1983. #1:/China/mwh017cp ID. Monroe, W.H. 17cp View of karst topography taken from boat on trip down the Li River south of Guilin. River and part of boat deck in lower left; a foggy day. China, October 28, 1983. #1:/China/mwh022cp ID. Monroe, W.H. 22cp View of stone wall and trees along river bank, taken from boat on trip down the Li River south of Guilin. China. October 28, 1983. #1:/China/mwh023cp ID. Monroe, W.H. 23cp View of karst topography at river edge, taken from boat on trip down the Li River south of Guilin. Houses on bank in foreground; river also in foreground; edge of boat deck at left. A foggy day. China. October 28, 1983. #1:/China/mwh024cp ID. Monroe, W.H. 24cp Distant view of karst topography with natural arch on one side taken from boat on trip down the Li River south of Guilin. River and banks with boats in foreground. China. October 28, 1983. #1:/China/mwh025cp ID. Monroe, W.H. 25cp View of children along bank of river, taken from boat on trip down the Li River south of Guilin. China. October 28, 1983. #1:/China/mwh25acp ID. Monroe, W.H. 25acp Dramatic near view of karst topography taken from boat on trip down the Li River south of Guilin. A foggy day, China. October 28, 1983. #1:/China/mwh026cp ID. Monroe, W.H. 26cp View of man with boat? on river, taken from boat on trip down the Li River south of Guilin. China. October 28, 1983. #1:/China/mwh027cp ID. Monroe, W.H. 27cp China. Karst topography along the Li River. October 28, 1983. #1:/China/mwh028cp ID. Monroe, W.H. 28cp View of people in small boat on river; bottom of karst tower at left. Karst topography in distance in foggy haze. Views taken from boat on trip down the Li River south of Guilin. China. October 28, 1983. #1:/China/mwh029cp ID. Monroe, W.H. 29cp Dramatic view of karst topography at river's edge, taken from boat on trip down the Li River south of Guilin. China. October 28, 1983. #1:/China/mwh00029 ID. Monroe, W.H. 29cp China. Karst topography at the edge of Li River south of Guilin. October 28, 1983. #1:/China/mwh030cp ID. Monroe, W.H. 30cp Woman doing laundry at river's edge, other people and boats, stone wall at shore, houses. Views taken from boat on trip down the Li River south of Guilin. China. October 28, 1983. #1:/Puerto Rico/mwh00005 ID. Monroe, W.H. 5ct Puerto Rico. Pocket bay east of Punta Las Tunas. The beach owes its shape to the advancing wave front. March 27, 1967. #1:/Puerto Rico/mwh00006 ID. Monroe, W.H. 6ct Puerto Rico. West-southwest of Marchiquita, a reverberation bay was formed behind a breach in the eolinate ridge by reformed advancing wave front, visible halfway between ridge and beach. March 27, 1967. #1:/Monore Collection/mwhb0031 ID. Monroe, W.H. 31b Dug Well with Cypress log as curbing. John D. Locklear and family. Coratan Indians. Robeson County, North Carolina. cc1936. #1:/Monore Collection/mwhb0032 ID. Monroe, W.H. 32b Unburned swamp, burnt swamp, 3 miles west of Raft Swamp. Robeson County, North Carolina. cc1936. #1:/Puerto Rico/mwh00054 ID. Monroe, W.H. 54ct Puerto Rico. Cueva del Indio, a sea cave eroded in eolianite, just east of Punta Las Tunas on the Atlantic coast, 8 kilometers east-northeast of Arecibo. The name derived from petroglyphs on the cave walls. March 27, 1967. #1:/Monore Collection/mwhb0119 ID. Monroe, W.H. 119b Fee No. 2 (deep test) well. View from south. Sec. 25, T. 6 N., R. 1 E. Hinds County, Mississippi. December 7, 1936. #1:/Monore Collection/mwhb0120 ID. Monroe, W.H. 120b State Mississippi, Fee No. 2 (deep test) well. Disconnecting elevators while lowering drill stem into hole. Sec. 25, T. 6 N., R. 1 E. Hinds County, Mississippi. December 13, 1936. #1:/Monore Collection/mwhb0121 ID. Monroe, W.H. 121b State of Mississippi, Fee No. 2 (deep test) well. Connecting a joint while lowering drill stem into hole. Sec. 25, T. 6 N., R. 1 E. Hinds County, Mississippi. December 13, 1936. #1:/Monore Collection/mwhb0122 ID. Monroe, W.H. 122b Gas bubbling from crater at State of Mississippi, Fee No. 1 well, which blew out at the top of the Wilcox group. Sec. 25, T. 6 N., R. 1 E. Hinds County, Mississippi. December 1936. #1:/Monore Collection/mwhb0123 ID. Monroe, W.H. 123b State of Mississippi, Fee No. 2 (deep test) well. Drilling at night. View from south. Sec. 25, T. 6 N., R. 1 E. Hinds County, Mississippi. December 1936. #1:/Monore Collection/mwhb0124 ID. Monroe, W.H. 124b State of Mississippi, Fee No. 2 (deep test) well. Drilling engine. Sec. 25, T. 6 N., R. 1 E. Hinds County, Mississippi. December 25, 1936. #1:/Monore Collection/mwhb0127 ID. Monroe, W.H. 127b State of Mississippi, Fee No. 4 gas well. Sec. 35, T. 6 N., R. 1 E. Shows top of casing, christmas tree, tubing, water drip, and regulator house. Hinds County, Mississippi. January 27, 1937. #1:/Monore Collection/mwhb0128 ID. Monroe, W.H. 128b State of Mississippi, Fee No. 2 (deep test) well. View from west. Sec. 25, T. 6 N., R. 1 E. Hinds County, Mississippi. January 27, 1937. #1:/Monore Collection/mwhb0129 ID. Monroe, W.H. 129b State of Mississippi, Fee No. 3 gas well. Produces from top of Wilcox group. Flooded by back water from Pearl River. Sec. 25, T. 6 N., R. 1 E. Hinds County, Mississippi. January 28, 1937. #1:/Monore Collection/mwhb0130 ID. Monroe, W.H. 130b H.N. Toler, State Oil and Gas Supervisor, Blount Wringt of United Gas Public Service Co., and Harold Anderson, contractor, at Rhae Smith, Crane-Lawrence. State of Mississippi, Fee No. 1 well. Sec. 23, T. 6 N., R. 1 E. Hinds County, Mississippi. February 6, 1937. #1:/Little River Falls National Preserve/mwh00159 ID. Monroe, W.H. 159 Little River Falls National Preserve, Alabama. Falls of the Little River over ledges of Pottsville Sandstone, 2 miles north-northeast of Blanche. March 9, 1937. #1:/Little River Falls National Preserve/mwh00160 ID. Monroe, W.H. 160 Little River Falls National Preserve, Alabama. Little River, undercutting Pottsville Sandstone, below Little River Falls. March 9, 1937. #1:/Monroe W.H. Collection/mwh00197 ID. Monroe, W.H. 197 Thrust fault in Coastal Plain. Selma chalk faulted up into Ripley formation. Tombigbee River below Paces Landing. Marengo County, Alabama. October 14, 1937. #1:/Puerto Rico/mwh00382 ID. Monroe, W.H. 382 Puerto Rico. Mogotes rising out of pineapple fields in a plain of blanket sand near Coto Sur. The quarry in the left background is 1 kilometer east of Manati. #1:/Puerto Rico/mwh00386 ID. Monroe, W.H. 386 Puerto Rico. Southern edge of an area of zanjones at Torrecillas, 4 kilometers northwest of Morovis. The zanjones rise up the sides of hills, but commonly coalesce to form linear valleys. 1963. Figure 35, U.S. Geological Survey Professional Paper 899. #1:/Puerto Rico/mwh00474 ID. Monroe, W.H. 474 Puerto Rico. Dolines in Aquada Limestone, 2 kilometers south of Coto Sur. January 16, 1964. #1:/Puerto Rico/mwh00475 ID. Monroe, W.H. 485 Puerto Rico. Calcareous beachrock formed on a beach east of the mouth of the Rio Cibuco at Vega Alta. May 17, 1960. Portion of figure 22, U.S. Geological Survey Professional Paper 1159. #1:/Alaska Glaciers/ct000001 ID. Chapin, T. 1 Alaska Glaciers. Miles Glacier, which is north of Katalla in the Chugach Mountains. 1911. #1:/Alaska-Bulletin 576/cha00003 ID. Chapin, T. 3 Limestone included in greenstone mass north of Canyon Creek and west of trail leading from Canyon Creek to Taral, the included mass is about a mile long. Valdez district, Copper River region, Alaska. 1911. Plate 4-B in U.S. Geological Survey. Bulletin 576. 1914. #1:/Alaska Glaciers/cha00019 ID. Chapin, T. 19 Lower Tebay Lake. Valdez Quad. Bremner District, Copper River region, Alaska. 1911. #1:/Alaska Glaciers/ct000026 ID. Chapin, T. 26 Alaska Glaciers. Terminus of Miles Glacier, which is north of Katalla in the Chugach Mountains. 1911. #1:/Alaska-Bulletin 745/cha00031 ID. Chapin, T. 31 Folded thin-bedded Triassic limestone between Clear and Squaw Creeks. Valdez district, Alaska Gulf region, Alaska. 1914. Plate 17-B in U.S. Geological Survey. Bulletin 745. 1923. #1:/Alaska-Bulletin 745/cha00035 ID. Chapin, T. 35 Characteristic exposure of Chitistone limestone on Strelna Creek, below the limestone is greenstone. Valdez district, Alaska Gulf region, Alaska. 1914. Plate 13-A in U.S. Geological Survey. Bulletin 745. 1923. #1:/Alaska-Bulletin 745/cha00036 ID. Chapin, T. 36 An exposure of Chitistone limestone on Clear Creek. Valdez district, Alaska Gulf region, Alaska. 1914. Plate 10-B in U.S. Geological Survey. Bulletin 745. 1923. #1:/Alaska Glaciers/cha00039 ID. Chapin, T. 39 Mt. Blackburn and Kuskulana Glacier. McCarthey Quad. Kuskulana District, Copper River region, Alaska. 1911. #1:/Alaska Glaciers/cha00040 ID. Chapin, T. 40 Mt. Blackburn and Kuskulana Glacier. McCarthey Quad. Kuskulana District, Copper River region, Alaska. 1911. #1:/Alaska Glaciers/cha00041 ID. Chapin, T. 41 Mt. Blackburn and Kuskulana Glacier. McCarthey Quad. Panorama with Photo Nos. cha00040 and cha00042. Kuskulana District, Copper River region, Alaska. 1911. #1:/Alaska-Bulletin 745/cha00047 ID. Chapin, T. 47 "Rock glacier" on Porcupine Creek, more distant view shown as Chapin 48. Valdez district, Alaska Gulf region, Alaska. 1914. Plate 14-B in U.S. Geological Survey. Bulletin 745. 1923. #1:/Alaska-Bulletin 745/cha00048 ID. Chapin, T. 48 Head of Porcupine Creek, showing "rock glacier" Valdez district, Alaska Gulf region, Alaska. 1914. Plate 14-A in U.S. Geological Survey. Bulletin 745. 1923 #1:/Alaska-Bulletin 668/cha00147 ID. Chapin, T. 147 Albert Creek. Talkeetna district, Copper River region Alaska. 1914. Plate 10-A in U.S. Geological Survey. Bulletin 668. 1917. #1:/Alaska-Bulletin 668/cha00148 ID. Chapin, T. 148 Ground sluicing on Olsen and Getchel claims on Albert Creek. Talkeetna district, Copper River region Alaska. 1914. Plate 10-B in U.S. Geological Survey. Bulletin 668. 1917. #1:/Alaska-Bulletin 668/cha00149 ID. Chapin, T. 149 Volcanic rocks at the head of Alfred Creek, Tertiary basalt unconformably overlying Lower Jurassic tuff beds (white rock in photo 150). Talkeetna district, Copper River region Alaska. 1914. Plate 7-B in U.S. Geological Survey. Bulletin 668. 1917. #1:/Alaska-Bulletin 668/cha00150 ID. Chapin, T. 150 Volcanic rocks at the head of Alfred Creek, Tertiary basalt unconformably overlying Lower Jurassic tuff beds (white rock in photo 150). Talkeetna district, Copper River region Alaska. 1914. Plate 7-B in U.S. Geological Survey. Bulletin 668. 1917. #1:/Alaska-Bulletin 668/cha00165 ID. Chapin, T. 165 Interbedded tuff and andesite, Oshetna River. Talkeetna district, Copper River region Alaska. 1914. Plate 6-B in U.S. Geological Survey. Bulletin 668. 1917. #1:/Alaska-Bulletin 668/cha00166 ID. Chapin, T. 166 Jointed andesite, Oshetna River. Talkeetna district, Copper River region Alaska. 1914. Plate 6-A in U.S. Geological Survey. Bulletin 668. 1917. #1:/Alaska-Bulletin 668/cha00184 ID. Chapin, T. 184 Susitna River near mouth Maclaren River. Nelchina district, Copper River region Alaska. 1914. Plate 5-A in U.S. Geological Survey. Bulletin 668. 1917. #1:/Alaska-Bulletin 668/cha00215 ID. Chapin, T. 215 Contorted schist on Tsusena Creek. Talkeetna district, Copper River region Alaska. 1914. Plate 5-B in U.S. Geological Survey. Bulletin 668. 1917. #1:/Alaska-Bulletin 668/cha00232 ID. Chapin, T. 232 Tazlina River at the mouth of Moose Creek showing dissected gravel plain of Copper- Susitna basin.. Gulkana district, Copper River region, Alaska. 1914. Plate 3-B in U.S. Geological Survey. Bulletin 668. 1917. #1:/Alaska-Bulletin 668/cha00233 ID. Chapin, T. 233 Tazlina River at the mouth of Moose Creek showing dissected gravel plain of Copper- Susitna basin. Gulkana district, Copper River region, Alaska. 1914. Plate 3-B in U.S. Geological Survey. Bulletin 668. 1917. #1:/Alaska-Bulletin 668/cha00234 ID. Chapin, T. 234 Tazlina River at the mouth of Moose Creek showing dissected gravel plain of Copper- Susitna basin. Gulkana district, Copper River region, Alaska. 1914. Plate 3-B in U.S. Geological Survey. Bulletin 668. 1917. #1:/Alaska Glaciers/cha00285 ID. Chapin, T. 285 Totems, Cat Island. Ketchikan Quad. Southeastern Alaska. Alaska. 1915. #1:/Alaska Glaciers/cha00286 ID. Chapin, T. 286 Totems, Cat Island. Ketchikan Quad. Southeastern Alaska. Alaska. 1915. #1:/Alaska-Southeastern Alaska-Professional paper 120/cha00260 ID. Chapin, T. 260 Conglomerate: Blank Inlet, Wales district, Southeastern Alaska region, Alaska. 1915. Plate 8-B in U.S. Geological Survey. Professional paper 120. 1919. #1:/Alaska-Southeastern Alaska-Professional paper 120/cha00263 ID. Chapin, T. 263 Slate and greywacke: Blank Inlet, Wales district, Southeastern Alaska region, Alaska. 1915. Plate 8-C in U.S. Geological Survey. Professional paper 120. 1919. #1:/Alaska-Southeastern Alaska-Professional paper 120/cha00266 ID. Chapin, T. 266 Wave-cut bench, across Dall Bay, Gravina Island, Wales district, Southeastern Alaska region, Alaska. 1915. Plate 8-A in U.S. Geological Survey. Professional paper 120. 1919. #1:/Alaska-Southeastern Alaska-Professional paper 120/cha00274 ID. Chapin, T. 274 Anticline on Vallenar Bay: Gravina Island, Wales district, Southeastern Alaska region, Alaska. 1915. Plate 8-D in U.S. Geological Survey. Professional paper 120. 1919. #1:/Alaska Glaciers/cha00293 ID. Chapin, T. 293 Totems, Old Kasaan. Southeastern Alaska. Alaska. 1915. #1:/Alaska Glaciers/cha00294 ID. Chapin, T. 294 Totems, Old Kasaan. Southeastern Alaska. Alaska. 1915. #1:/Brooks Collections/bah00004 ID. Brooks, A.H. 4 Totem pole. Picket fence. Fort Wrangell. Wrangell district, Southeastern Alaska region, Alaska. April 8, 1898. #1:/Brooks Collections/bah00005 ID. Brooks, A.H. 5 View of Fort Wrangell showing totem poles, stores, tents, houses, wooden walkways and townfolk. Wrangell district, Southeastern Alaska region, Alaska. April 8, 1898. #1:/Brooks Collections/bah00006 ID. Brooks, A.H. 6 View of Fort Wrangell showing totem poles, stores, tents, houses, wooden walkways and townfolk. Wrangell district, Southeastern Alaska region, Alaska. April 8, 1898. #1:/Klondike Gold Rush National Historic Park/bah00011 ID. Brooks, A.H. 11 Klondike Gold Rush National Historic Park, Alaska. Wrecked ship near Skagway, seen from the steamer "Wheeling." Pier and another steam ship in the background. April 1898. #1:/Klondike Gold Rush National Historic Park/bah00018 ID. Brooks, A.H. 18 Klondike Gold Rush National Historic Park, Alaska. Steamer "Wheeling" anchored at Skagway, viewed from the pier. April 1898. #1:/Klondike Gold Rush National Historic Park/bah00019 ID. Brooks, A.H. 19 Klondike Gold Rush National Historic Park, Alaska. Up Broadway in Skagway. April 1898. #1:/Klondike Gold Rush National Historic Park/bah00020 ID. Brooks, A.H. 20 Klondike Gold Rush National Historic Park, Alaska. Parsons Peak, viewed from Skagway. In the background, under 10X magnification, there is a sign that reads "Telephone Office." There are also signs for several businesses including the Rainier Hotel, RealEstate, Photographer, Canadian Pacific Railway, Brokers and so on. Skagway district, Southeastern Alaska region, Alaska. April 11-14, 1898. #1:/Klondike Gold Rush National Historic Park/bah00022 ID. Brooks, A.H. 22 Klondike Gold Rush National Historic Park, Alaska. Puget Sound Restaurant and other businesses on main street (Broadway?) in Skagway. April 1898. #1:/Klondike Gold Rush National Historic Park/bah00034 ID. Brooks, A.H. 34 Klondike Gold Rush National Historic Park, Alaska. Upper end of the trail and summit of the west side of Chilkoot Pass. 1898. #1:/Klondike Gold Rush National Historic Park/bah00035 ID. Brooks, A.H. 35 Klondike Gold Rush National Historic Park, Alaska. Men bringing sleds down the east side of Chilkoot Pass. 1898. #1:/Brooks Collection/bah00048 ID. Brooks, A.H. 48 View of Wold Duck Camp from the ice on Lake Marsh. Yukon Territory, Canada. May 11, 1898. #1:/Brooks Collection/bah00051 ID. Brooks, A.H. 51 Two Survey parties together at Wild Duch Camp. Group includes W.C. Mendenhall [standing 4th from left]. Yukon Territory, Canada. May 11, 1898. #1:/Alaska-Bulletin 284/bah00134 ID. Brooks, A.H. 134 Tanana valley, 50 miles from Fairbanks, railway route to, Lynn Canal to Fairbanks. Fairbanks district, Yukon region, Alaska. 1905. Plate 5-A, as a sketch, in U.S. Geological Survey. Bulletin 284. 1906. #1:/Alaska-Bulletin 284/bah00205 ID. Brooks, A.H. 205 Tatshenshini Valley (East Fork of the Alsek), railway route, Lynn Canal to Fairbanks, Lituya district, Alaska Gulf region, Alaska. 1905. Plate 4-A in U.S. Geological Survey. Bulletin 284. 1906. #1:/Alaska Glacier/bah00224 ID. Brooks, A.H. 224 Looking acroos O'Connor Glacier, which is gravel-covered in the foreground but white ice in the distance. Yukon Territory, Canada. 1899. #1:/Alaska Glacier/bah00225 ID. Brooks, A.H. 225 West front of O'Connor Glacier. Yukon Territory, Canada. 1899. #1:/Alaska Glacier/bah00226 ID. Brooks, A.H. 226 Sand plain in from of O'Connor Glacier, on the west front. Panorama with bah00227. Yukon Territory, Canada. 1899. #1:/Alaska Glacier/bah00227 ID. Brooks, A.H. 227 Sand plain in from of O'Connor Glacier, on the west front. Panorama with bah00226. Yukon Territory, Canada. 1899. #1:/Alaska Glacier/bah00228 ID. Brooks, A.H. 228 Mountains, and O'Connor Glacier. Yukon Territory, Canada. 1899. #1:/Alaska Glacier/bah00229 ID. Brooks, A.H. 229 O'Connor Glacier. Yukon Territory, Canada. 1899. #1:/Alaska-Images/bah00334 ID. Brooks, A.H. 334 A.H. Brooks examining a section of gold bearing gravels and sands, Sweetcake Creek, tributary of Ophir Creek. Council district, Seward Peninsula region, Alaska. 1900. Left photograph page 25 , Images of the U.S. Geological Survey, 1879-1979. #1:/Alaska-Professional paper 70/bah00696 ID. Brooks, A.H. 696 Tatina River valley, Kuskokwim basin, Kuskokwim region, Alaska. July 17, 1902. Plate 5-A in U.S. Geological Survey. Professional paper 70. 1910. #1:/Alaska-Professional paper 70/bah00712 ID. Brooks, A.H. 712 Glacial cirques at head of East Fork of Tonzona River. Tonzona River basin. Tonzona district, Kuskokwim region, Alaska. July 25, 1902. Plate 13-B in U.S. Geological Survey. Professional paper 70. 1910. #1:/Alaska-Professional paper 70/bah00741 ID. Brooks, A.H. 741 Mount McKinley from the north, Mount Foraker to the right in the distance. Piedmont gravel floored plateau in the foreground. Denali National Park and Preserve. Kantishna district, Yukon region, Alaska. August 8, 1902. Plate 6-A in U.S. Geological Survey. Professional paper 70. 1910. #1:/Alaska-Professional paper 70/bah00762 ID. Brooks, A.H. 762 Yanert Fork, looking upstream, showing floodplain deposits in basin lowlands above Canyon of Nenana River Nenana district, Yukon region, Alaska. August 18, 1902. Plate 12-B in U.S. Geological Survey. Professional paper 70. 1910. #1:/Alaska-Professional paper 70/bah00767 ID. Brooks, A.H. 767 Lignitic coal interbedded with white sandstone and conglomerate on Healy Fork. Valdez Creek district, Cook Inlet region, Alaska. 1902. Plate 16-B in U.S. Geological Survey. Professional paper 70. 1910. #1:/Alaska-Professional paper 70/bah00777 ID. Brooks, A.H. 777 View looking up Nenana valley, three gravel terraces are shown. Nenana district, Yukon region, Alaska. August 22, 1902. Plate 12-A in U.S. Geological Survey. Professional paper 70. 1910. #1:/Alaska-Professional paper 70/bah00791 ID. Brooks, A.H. 791 Tanana River at Tortella, Nenana district, Yukon region, Alaska. August 29, 1902. Plate 7-A in U.S. Geological Survey. Professional paper 70. 1910. #1:/Alaska-Professional paper 70/bah00820 ID. Brooks, A.H. 820 Seward facing escarpment of gravel terrace on west side of Cook Inlet, Alaska. June 2, 1902. Plate 4-B in U.S. Geological Survey. Professional paper 70. 1910. #1:/Alaska-Professional paper 70/bah00830 ID. Brooks, A.H. 830 Cottonwood timber on Beluga River, Anchorage district, Cook Inlet region, Alaska. June 6, 1902. Plate in U.S. Geological Survey. Professional paper 70. 1910. #1:/Alaska-Professional paper 70/bah00834 ID. Brooks, A.H. 834 Timbered flat and meadows northwest of Cook Inlet, Alaska. June 2, 1902. Plate 4-A in U.S. Geological Survey. Professional paper 70. 1910. #1:/Alaska-Professional paper 70/bah00847 ID. Brooks, A.H. 847 Southeastern part of Alaska Range, showing topographic character of Skwentna group. Cook Inlet region, Alaska. June 15, 1902. Plate 11-B in U.S. Geological Survey. Professional paper 70. 1910. #1:/Alaska-Professional paper 70/bah00867 ID. Brooks, A.H. 867 Grass and timber on Nin Ridge, Kichatna Valley, Yentna district, Cook Inlet region, Alaska. July 2, 1902. Plate 18-A in U.S. Geological Survey. Professional paper 70. 1910. #1:/Alaska-Professional paper 70/bah00887 ID. Brooks, A.H. 887 Head of Morris River, looking toward Simpson Pass, showing recent canyon and typical topography of Tordrillo formation. Talkeetna district, Cook Inlet region, Alaska. July 10, 1902. Plate 11-A in U.S. Geological Survey. Professional paper 70. 1910. #1:/Alaska-Professional paper 70/bah00898 ID. Brooks, A.H. 898 Valley of Dalzell creek, looking southeast, Rainy Pass in the distance. Yentna district, Cook Inlet region, Alaska. July 15, 1902. Plate 5-B in U.S. Geological Survey. Professional paper 70. 1910. #1:/Alaska-Professional paper 70/bah00905 ID. Brooks, A.H. 905 Foothills at inland front of Alaska Range in upper Tonzona River basin. Tonzona district, Kuskokwim region, Alaska. July 24, 1902. Plate 13-A in U.S. Geological Survey. Professional paper 70. 1910. #1:/Alaska-Professional paper 70/bah00909 ID. Brooks, A.H. 909 Bedded and jointed siliceous Devonian limestone, near camp; topographic party at work. Tonzona district, Yukon region, Alaska. July 24, 1902. Plate 10-A in U.S. Geological Survey. Professional paper 70. 1910. #1:/Alaska-Professional paper 70/bah00911 ID. Brooks, A.H. 911 Anticlinal fold in sandy limestone and shales of the Tatina group. Tonzona district, Yukon region, Alaska. July 24, 1902. Plate 10-B in U.S. Geological Survey. Professional paper 70. 1910. #1:/Alaska-Professional paper 70/bah00923 ID. Brooks, A.H. 923 Piedmont gravel plateau at northwest base of Alaska Range, showing glacial erratic boulder. Tonzona district, Yukon region, Alaska. July 29, 1902. Plate 6-B in U.S. Geological Survey. Professional paper 70. 1910. #1:/Alaska-Professional paper 70/bah00930 ID. Brooks, A.H. 930 Mount McKinley from the 14 miles northwest; Denali National Park and Preserve. Kantishna district, Yukon region, Alaska. August 4, 1902. Plate 1 in U.S. Geological Survey. Professional paper 70. 1910. #1:/Denali National Park and Preserve/bah00931 ID. Brooks, A.H. 931 Denali National Park and Preserve, Alaska. Along the front of Mount McKinley. August 4, 1902. #1:/Denali National Park and Preserve/bah00932 ID. Brooks, A.H. 932 Denali National Park and Preserve, Alaska. Ridge at the base of Mount McKinley. August 5, 1902. #1:/Alaska-Professional paper 70/bah00933 ID. Brooks, A.H. 933 Glacier overriding ridge of Alaska Range, 9 miles northwest of Mount McKinley. Denali National Park and Preserve. Kantishna district, Yukon region, Alaska. August 4, 1902. Plate 14-A in U.S. Geological Survey. Professional paper 70. 1910. #1:/Alaska-Professional paper 70/bah00934 ID. Brooks, A.H. 934 Glacier covered ridge between Peters Glacier and mountain front, 9 miles northwest of Mount McKinley. Denali National Park and Preserve. Kantishna district, Yukon region, Alaska. August 4, 1902. Plate 14-B in U.S. Geological Survey. Professional paper 70. 1910. #1:/Alasks-Professional paper 45/bah01018 ID. Brooks, A.H. 1018 View down Gastineau Channel from Mount Juneau, showing typical shore topography of southern Alaska. n.d., plate 4-A in U.S. Geological Survey. Professional paper 45. 1906. #1:/Alasks-Professional paper 45/bah01030 ID. Brooks, A.H. 1030 Relief model of Alaska, by E. E. Howell, from base map by U.S. Geological Survey. Plate 1 in U.S. Geological Survey. Professional paper 45. 1906. #1:/Alaska-Glacier Bay National Park/bah01298 ID. Brooks, A.H. 1298 Glacier Bay National Park and Preserve, Alaska. Reid Glacier. August 13, 1924. #1:/Alaska-Glacier Bay National Park/bah01299 ID. Brooks, A.H. 1299 Glacier Bay National Park and Preserve, Alaska. Reid Glacier more distant than Brooks 1298. August 13, 1924. #1:/Alaska-Glacier Bay National Park/bah01302 ID. Brooks, A.H. 1302 Glacier Bay National Park and Preserve, Alaska. Distant view of Gilbert Glacier. August 13, 1924. #1:/Alaska-Glacier Bay National Park/bah01303 ID. Brooks, A.H. 1303 Glacier Bay National Park and Preserve, Alaska. Part of Gilbert Glacier. August 13, 1924. #1:/Alaska-Glacier Bay National Park/bah01304 ID. Brooks, A.H. 1304 Glacier Bay National Park and Preserve, Alaska. Ice pinnacles of front of Gilbert Glacier. August 13, 1924. #1:/Alaska-Glacier Bay National Park/bah01305 ID. Brooks, A.H. 1305 Glacier Bay National Park and Preserve, Alaska. Float ice from Lamplugh Glacier, 5 P.M. August 13, 1924. #1:/Alaska-Glacier Bay National Park/bah01306 ID. Brooks, A.H. 1306 Glacier Bay National Park and Preserve, Alaska. Northern margin of Grand Pacific Glacier. August 13, 1924. #1:/Alaska-Glacier Bay National Park/bah01307 ID. Brooks, A.H. 1307 Glacier Bay National Park and Preserve, Alaska. Southern margin of Grand Pacific Glacier. August 13, 1924. #1:/Alaska-Glacier Bay National Park/bah01309 ID. Brooks, A.H. 1309 Glacier Bay National Park and Preserve, Alaska. Southern margin of Grand Pacific Glacier from motorboat. August 13, 1924. #1:/Alaska-Glacier Bay National Park/bah01310 ID. Brooks, A.H. 1310 Glacier Bay National Park and Preserve, Alaska. Gilbert Glacier front August 13, 1924. #1:/Alaska-Glacier Bay National Park/bah01311 ID. Brooks, A.H. 1311 Glacier Bay National Park and Preserve, Alaska. Distant view of Reid Glacier, above No Name Glacier. 4 p.m. August 13, 1924. #1:/Alaska-Glacier Bay National Park/bah01312 ID. Brooks, A.H. 1312 Glacier Bay National Park and Preserve, Alaska. Lamplugh Glacier. August 13, 1924. #1:/Alaska-Glacier Bay National Park/bah01313 ID. Brooks, A.H. 1313 Glacier Bay National Park and Preserve, Alaska. Front of Lamplugh Glacier, August 13, 1924. #1:/Alaska-Glacier Bay National Park/bah01315 ID. Brooks, A.H. 1315 Glacier Bay National Park and Preserve, Alaska. Rendu Glacier, from USGS station at Narrows (?). August 14, 1924. #1:/Alaska-Glacier Bay National Park/bah01316 ID. Brooks, A.H. 1316 Glacier Bay National Park and Preserve, Alaska. Front of Carroll Glacier. August 14, 1924. #1:/Alaska-Glaciers/bah01320 ID. Brooks, A.H. 1320 Chenaga Glacier, Wells district, Cook Inlet region, Alaska. 1924. #1:/Alaska Glaciers/ala00087 ID. Alaska, no. 87 Alaska Glaciers. Outwash of Valdez Glacier. Photo by Stephen Taber. Valdez district, Alaska Gulf region, Alaska. July 6, 1935. #1:/Alaska Glaciers/ala00088 ID. Alaska, no. 88 Alaska Glaciers. Looking up east side of Valdez Glacier. Panorama with Photo Nos. ala00086 and ala00087. Photo by Stephen Taber. Valdez district, Alaska Gulf region, Alaska. July 6, 1935. #1:/Alaska Glaciers/ala00089 ID. Alaska, no. 89 Alaska Glaciers. Looking up Camicia Glacier from Valdez Glacier. Photo by Stephen Taber. Valdez district, Alaska Gulf region, Alaska. July 6, 1935. #1:/Alaska Glaciers/ala00090 ID. Alaska, no. 90 Alaska Glaciers. Crevasses and lateral Moraine on west side Valdez Glacier. Photo by Stephen Taber. Valdez district, Alaska Gulf region, Alaska. September 6, 1935. #1:/Alaska Glaciers/ala00094 ID. Alaska, no. 94 Alaska Glaciers. Terminus of Columbia Glacier, which is west of Valdez in the Chugach Mountains. Photo by S. Taber, July 3, 1935. Photos ala00094 and ala00095 form a panorama. Valdez district, Alaska Gulf region, Alaska. July 3, 1935. #1:/Alaska Glaciers/ala00095 ID. Alaska, no. 95 Alaska Glaciers. Terminus of Columbia Glacier, which is west of Valdez in the Chugach Mountains. Photo by S. Taber, July 3, 1935. Photos ala00094 and ala00095 form a panorama. Valdez district, Alaska Gulf region, Alaska. July 3, 1935. #1:/Alaska Glaciers/ala00096 ID. Alaska, no. 96 Alaska Glaciers. Panorama of front of Columbia Glacier. Photo by Stephen Taber. Valdez district, Alaska Gulf region, Alaska. July 3, 1935. #1:/Alaska Glaciers/ala00097 ID. Alaska, no. 97 Alaska Glaciers. Panorama of front of Columbia Glacier. Photo by Stephen Taber. Valdez district, Alaska Gulf region, Alaska. July 3, 1935. #1:/Alaska Glaciers/ala00098 ID. Alaska, no. 98 Alaska Glaciers. Panorama of front of Columbia Glacier. Photo by Stephen Taber. Valdez district, Alaska Gulf region, Alaska. July 3, 1935. #1:/Alaska Glaciers/ala00099 ID. Alaska, no. 99 Alaska Glaciers. Panorama of front of Columbia Glacier. Photo by Stephen Taber. Valdez district, Alaska Gulf region, Alaska. July 3, 1935. #1:/Denali National Park and Preserve/ala00100 ID. Alaska, no. 100 Denali National Park and Preserve, Alaska. Mount McKinley across Muldrow Glacier. Photo by Blanchard. Kantishna, Yukon. Alaska. 1923. #1:/Denali National Park and Preserve/ala00102 ID. Alaska, no. 102 Denali National Park and Preserve, Alaska. Near view of Mount McKinley across Muldrow Glacier. Photo by Blanchard. Kantishna, Yukon. Alaska. 1923. #1:/Denali National Park and Preserve/ala00105 ID. Alaska, no. 105 Denali National Park and Preserve, Alaska. Mount McKinley across Muldrow Glacier. Photo by Blanchard. Kantishna, Yukon. Alaska. 1923. #1:/Alaska/ala00119 ID. Alaska, no. 119 Coal seams in hillside. Photo by R.H. Sargent. Alaska. cc 1924. #1:/Alaska/ala00120 ID. Alaska, no. 120 Drifting in frozen ground. Photo by R.H. Sargent. None, Seward Peninsula. Alaska. cc 1924. #1:/Alaska/ala00122 ID. Alaska, no. 122 Alaska Juneau Mill. The Mill closed down opertions about 1942. Photo by R.H. Sargent. Juneau, South East Alaska. Alaska. cc 1924. #1:/Alaska/ala00123 ID. Alaska, no. 123 Gold dredge in operation. Photo by G. Kaiser and R.H. Sargent. Yukon region. Alaska. cc 1924. #1:/Alaska/ala00124 ID. Alaska, no. 124 Steamers in ice on Yukon. Photo by R.H. Sargent. Yukon region. Alaska. cc 1924. #1:/Alaska/ala00125 ID. Alaska, no. 125 Landing freight on Bering Sea Ice. Photo by G. Kaiser and R.H. Sargent. Bering Sea. Alaska. cc 1924. #1:/Alaska/ala00126 ID. Alaska, no. 126 Wreck of the Princess May at Sentinel Island Aug 5, 1910. Photo by R.H. Sargent. Bering Sea. Alaska. cc 1910. #1:/Alaska/ala00141 ID. Alaska, no. 141 Eskimo Umiak, Bering Sea. Photo by R.H. Sargent. Bering Sea. Alaska. cc 1925. #1:/Alaska/ala00142 ID. Alaska, no. 142 Native [Eskimo] with Kayak. Photo by R.H. Sargent. Bering Sea. Alaska. cc 1925. #1:/Alaska/ala00143 ID. Alaska, no. 143 Native [Eskimo] baskets. Photo by R.H. Sargent. Bering Sea. Alaska. cc 1925. #1:/Alaska/ala00144 ID. Alaska, no. 144 Six Natives [Eskimos] in native dress. Photo by R.H. Sargent. Bering Sea. Alaska. cc 1925. #1:/Alaska/ala00145 ID. Alaska, no. 145 Four Natives [Eskimos] in native dress. Photo by R.H. Sargent. Bering Sea. Alaska. cc 1925. #1:/Alaska/ala00146 ID. Alaska, no. 146 Eskimo mothers, Port Clarence. Photo by Norwell and R.H. Sargent. York, Seward Peninsula. Alaska. cc 1904. #1:/Alaska/ala00147 ID. Alaska, no. 147 Native [Eskimo] school children in class room. Port Clarence. Photo by R.H. Sargent. York, Seward Peninsula. Alaska. cc 1904. #1:/Alaska/ala00161 ID. Alaska, no. 161 Valley Glacier. Photo by R.H. Sargent. Alaska. cc 1925. #1:/Alaska/ala00162 ID. Alaska, no. 162 Railroad yards at Anchorage. Photo by R.H. Sargent. Anchorage, Cook Inlet, Alaska. cc 1925. #1:/Alaska/ala00163 ID. Alaska, no. 163 Laying steel for the Alaska Railroad. Photo by R.H. Sargent. Alaska. cc 1925. #1:/Alaska/ala00164 ID. Alaska, no. 164 Pupmobile, Nome. Photo by R.H. Sargent. None, Seward Peninsula region, Alaska. cc 1925. #1:/Glacier Bay National Park and Preserve/ala00177 ID. Alaska, no. 177 Glacier Bay National Park and Preserve, Alaska. Crillon Glacier. Probably made during the Alaska Aerial Surveys. Photo by R.H. Sargent. Glacier Bay, South East Alaska, Alaska. cc 1926. #1:/Glacier Bay National Park and Preserve/ala00178 ID. Alaska, no. 178 Glacier Bay National Park and Preserve, Alaska. A tidewater glacier. Photo by R.H. Sargent. Glacier Bay, South East Alaska, Alaska. cc 1926. #1:/Alaska Glaciers/ala00179 ID. Alaska, no. 179 Alaska Glaciers. Terminus of Taku Glacier, which is northeast of Juneau in the Coast Mountains. Photo by R.H. Sargent. Probably taken during the Alaska Aerial Surveys. Glacier Bay, South East Alaska, Alaska. cc 1926. #1:/Alaska Glaciers/ala00185 ID. Alaska, no. 185 Alaska Glaciers. Mosaic of Twin Glaciers, Taku River, in the Coast Mountains. Photo by R.H. Sargent. Probably taken during the Alaska Aerial Surveys. Juneau, South East Alaska, Alaska. cc 1926. #1:/Alaska Glaciers/ala00187 ID. Alaska, no. 187 Alaska Glaciers. Muir Glacier, Glacier Bay. Photo by R.H. Sargent. Glacier Bay district, South East Alaska region, Alaska. cc 1926. #1:/Alaska Glaciers/ala00188 ID. Alaska, no. 188 Alaska Glaciers. U.S. Navy planes over Twin Glacier Lake. Photo by R.H. Sargent. U.S. Geologic Survey Bulletin 797. 1929. Glacier Bay district, South East Alaska region, Alaska. cc 1926. #1:/Alaska Glaciers/ala00299 ID. Alaska, no. 299 Prince Rupert (ship). Wrecked March 23, 1917. Photo by R.H. Sargent. Alaska. cc 1917. #1:/Alaska Glaciers/ala00340 ID. Alaska, no. 340 Near view of Mount McKinley across Muldrow Glacier. Kantishna distanct, Yukon region, Alaska. n.d. #1:/Alaska Glaciers/ala00350 ID. Alaska, no. 350 Stone monument marking where the plane of Will Rogers and Wiley Post crashed near Point Barrow, Alaska. Monument reads: Will Rogers and Wiley Post "Americas Ambassadors of Good Will", Ended life's flight here August 15, 1935. This stone was taken from the same quarry as that used in building Oklahoma's memorial to Will Rogers at Claremore, Oklahoma U.S.A. Barrow district, Northern Alaska region, Alaska, n.d. (R.F. Black photo no. 1007) Alaska. cc 1917. #1:/Alaska Glaciers/ala00366 ID. Alaska, no. 366 Distant view of U.S. Navy tender "Gannet" in front of Taku Glacier. Alaska Aerial Survey Expedition. Juneau (b-2) quadrangle. Juneau district, Southeastern Alaska region, Alaska. August-September 1926. #1:/San Francisco, California, Earthquake April 18, 1906/mrb00001 ID. Marshall, R.B. 1 San Francisco, California, Earthquake April 18, 1906. City Hall and Refugees. 8 am, April 19, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mrb00002 ID. Marshall, R.B. 2 San Francisco, California, Earthquake April 18, 1906. Distortion of pavement and tracks on Mission Street near Seventh. 7 am, April 19, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mrb00003 ID. Marshall, R.B. 3 San Francisco, California, Earthquake April 18, 1906. Army officers on Van Ness Avenus in charge of dynamiting. 10 am, April 19, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mrb00004 ID. Marshall, R.B. 4 San Francisco, California, Earthquake April 18, 1906. Effects of Earthquake only? near Leavenworth and Golden Gate Streets. 8 am, April 19, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mrb00005 ID. Marshall, R.B. 5 San Francisco, California, Earthquake April 18, 1906. Engine retiring from fire to take up new stand. 9 am, April 19, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mrb00006 ID. Marshall, R.B. 6 San Francisco, California, Earthquake April 18, 1906. View from Market and Fifth Streets showing earthquake damage and ongoing fires. 4 am, April 19, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mrb00007 ID. Marshall, R.B. 7 San Francisco, California, Earthquake April 18, 1906. View of Hopkins Institute of Art on fire. 11 am, April 19, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mrb00008 ID. Marshall, R.B. 8 San Francisco, California, Earthquake April 18, 1906. Breuner's furniture store burning out of control. 11 pm, April 18, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mrb00009 ID. Marshall, R.B. 9 San Francisco, California, Earthquake April 18, 1906. View of earthquake damage and people pulling trunks along city streets. April 19, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mrb00010 ID. Marshall, R.B. 10 San Francisco, California, Earthquake April 18, 1906. View of earthquake damage and fires. Across California Street, south from Nob Hill. 11 am, April 19, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mrb00011 ID. Marshall, R.B. 11 San Francisco, California, Earthquake April 18, 1906. View from corner Leavenworth and Golden Gate Ave. 8 am, April 19, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mrb00012 ID. Marshall, R.B. 12 San Francisco, California, Earthquake April 18, 1906. View northeast from City Hall showing massive damage to San Francisco. 1 pm, April 19, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mrb00013 ID. Marshall, R.B. 13 San Francisco, California, Earthquake April 18, 1906. View from corner of Taylor and Market Streets. Note, out of control fires are continuing to burn. 3 am, April 19, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mrb00014 ID. Marshall, R.B. 14 San Francisco, California, Earthquake April 18, 1906. View from corner of Taylor and Market Streets. Note, out of control fires are continuing to burn. 3 am, April 19, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mrb00015 ID. Marshall, R.B. 15 San Francisco, California, Earthquake April 18, 1906. Last Block to burn on Market Street. 5 am, April 19, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mrb00016 ID. Marshall, R.B. 16 San Francisco, California, Earthquake April 18, 1906. View from the U.S. Treasury Mint, N.E. 6 am, April 19, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mrb00017 ID. Marshall, R.B. 17 San Francisco, California, Earthquake April 18, 1906. Soldiers on Van Ness Avenue. 9 am, April 19, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mrb00018 ID. Marshall, R.B. 18 San Francisco, California, Earthquake April 18, 1906. Dragging trunks from fire; Van Ness Avenue. 9 am, April 19, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mrb00019 ID. Marshall, R.B. 19 San Francisco, California, Earthquake April 18, 1906. View of Down Jones from Nob Hill in San Francisco. 10 am, April 19, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mrb00020 ID. Marshall, R.B. 20 San Francisco, California, Earthquake April 18, 1906. St. Frances Hotel. Van Ness Avenue. 10 am, April 19, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mrb0020a ID. Marshall, R.B. 20a San Francisco, California, Earthquake April 18, 1906. Spreckles Mansion. Van Ness Avenue. 10 am, April 19, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mrb00021 ID. Marshall, R.B. 21 San Francisco, California, Earthquake April 18, 1906. Pleasanton burning in San Francisco. 12 pm [noon], April 19, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mrb00022 ID. Marshall, R.B. 22 San Francisco, California, Earthquake April 18, 1906. Palace Hotel in San Francisco. 12 pm [noon], April 19, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mrb00023 ID. Marshall, R.B. 23 San Francisco, California, Earthquake April 18, 1906. Looking down Market Street from Fifth, Flood Building on left, Emporium on right, Phelan and other buildings burning. 2 am, April 19, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mrb00024 ID. Marshall, R.B. 24 San Francisco, California, Earthquake April 18, 1906. Xaminer Building in San Francisco. April 19, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mrb00027 ID. Marshall, R.B. 27 San Francisco, California, Earthquake April 18, 1906. Powell from Market Street, Fire surrounding Golden West Hotel. 3 am, April 19, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mrb00028 ID. Marshall, R.B. 28 San Francisco, California, Earthquake April 18, 1906. Van Ness Avenue in San Francisco. April 19, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mrb00029 ID. Marshall, R.B. 29 San Francisco, California, Earthquake April 18, 1906. Looking down O'Farrell Street, Orpheum buring on right, Alcazar on left. 11 pm April 18, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mrb00030 ID. Marshall, R.B. 30 San Francisco, California, Earthquake April 18, 1906. Looking down Geary Street in San Francisco. 11 pm April 18, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mrb00031 ID. Marshall, R.B. 31 San Francisco, California, Earthquake April 18, 1906. Looking down Jones Street in San Francisco. 10 am April 19, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mrb00032 ID. Marshall, R.B. 32 San Francisco, California, Earthquake April 18, 1906. City Hall in San Francisco. 10 am April 19, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mrb00033 ID. Marshall, R.B. 33 San Francisco, California, Earthquake April 18, 1906. San Francisco in Flames. 2 am April 19, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mrb00034 ID. Marshall, R.B. 34 San Francisco, California, Earthquake April 18, 1906. City Hall, San Francisco. 10 am April 19, 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mrb00035 ID. Marshall, R.B. 35 San Francisco, California, Earthquake April 18, 1906. Flour Mill in Santa Rosa April 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mrb00036 ID. Marshall, R.B. 36 San Francisco, California, Earthquake April 18, 1906. Atheneum Theatre and Post Office, in Santa Rosa April 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mrb00037 ID. Marshall, R.B. 37 San Francisco, California, Earthquake April 18, 1906. Public Library in Santa Rosa April 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mrb00038 ID. Marshall, R.B. 38 San Francisco, California, Earthquake April 18, 1906. St. Rose Hotel in Santa Rosa April 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mrb00039 ID. Marshall, R.B. 39 San Francisco, California, Earthquake April 18, 1906. Theatre on right and Odd Fellows' Temple on left. Santa Rosa. April 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mrb00040 ID. Marshall, R.B. 40 San Francisco, California, Earthquake April 18, 1906. Miller House on Mendicino Street in Santa Rosa. April 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mrb00041 ID. Marshall, R.B. 41 San Francisco, California, Earthquake April 18, 1906. Court House on Third Street. Santa Rosa. April 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mrb00042 ID. Marshall, R.B. 42 San Francisco, California, Earthquake April 18, 1906. Fourth and A. Streets. Santa Rosa. April 1906. #1:/San Francisco, California, Earthquake April 18, 1906/mrb00043 ID. Marshall, R.B. 43 San Francisco, California, Earthquake April 18, 1906. Lower Fourth Street. Santa Rosa. April 1906. #1:/Yosemite National Park/ric00045 ID. Russell, I.C. 45 Mount Dana Glacier. Northern side of Mt. Dana. Yosemite National Park, California. 1883. #1:/Yosemite National Park/ric00046 ID. Russell, I.C. 46 Mount Dana Glacier. Northern side of Mt. Dana. Yosemite National Park, California. 1883. #1:/Yosemite National Park/ric00047 ID. Russell, I.C. 47 Mount Dana Glacier. Yosemite National Park, California. 1883. #1:/Yosemite National Park/ric00049 ID. Russell, I.C. 49 Mount Dana Glacier. Northern side of Mt. Dana. Yosemite National Park, California. 1883. Plate 37, U.S. Geological Survey Annual Report 5 (1883-1884). 1885. #1:/Yosemite National Park/ric00050 ID. Russell, I.C. 50 Yosemite National Park, California. Lyell Glacier. 1883. Plate 39, U.S. Geological Survey Annual Report 5 (1883-1884). 1885. #1:/Yosemite National Park/ric00051 ID. Russell, I.C. 51 Yosemite National Park, California. Lyell Glacier. 1883. Plate 28, U.S. Geological Survey Annual Report 5 (1883-1884). 1885. #1:/Yosemite National Park/ric00053 ID. Russell, I.C. 53 Yosemite National Park, California. Lyell Glacier, viewed from the northern side of Mount Lyell. 1883. Plate 28, U.S. Geological Survey Annual Report 8 (1886-1887). #1:/North Carolina-Folio 80/ric00270 ID. Russell, I.C. 270 Cypress trees and "knees" characteristic of the Dismal Swamp. Camden County, North Carolina. 1901. Figure 1 in U.S. Geological Survey. Folio 80. 1902. #1:/Virginia-Folio 80/ric00271 ID. Russell, I.C. 271 Cypress trees growing in Lake Drummond. Chesapeake County, Virginia. 1901 Figure 6 in U.S. Geological Survey. Folio 80. 1902. #1:/North Carolina-Folio 80/ric00276 ID. Russell, I.C. 276 Jericho Ditch, Dismal Swamp, overgrown by woods and canebrake. Camden County, North Carolina. 1901. Figure 4 in U.S. Geological Survey. Folio 80. 1902. #1:/North Carolina-Folio 80/ric00277 ID. Russell, I.C. 277 Jericho Ditch, Dismal Swamp. Canebrake at right. Camden County, North Carolina. 1901. Figure 3 in U.S. Geological Survey. Folio 80. 1902. #1:/Virginia-Folio 80/ric00278 ID. Russell, I.C. 278 Western shore of Lake Drummond, showing dense woods extending into the water. Chesapeake County, Virginia. 1901. Figure 5 in U.S. Geological Survey. Folio 80. 1902. #1:/North Carolina-Folio 80/ric00285 ID. Russell, I.C. 285 Western margin of Dismal Swamp, showing overflow during wet season. Camden County, North Carolina. 1901. Figure 2 in U.S. Geological Survey. Folio 80. 1902. #1:/Devils Tower National Monument/ric00286 ID. Russell, I.C. 286 Devils Tower National Monument, Wyoming. Devils Tower, viewed from the opposite side of Belle Fourche River. Horse-drawn wagon with two women at the lower right. Circa 1885. #1:/Colorado-Professional paper 52/ric00288 ID. Russell, I.C. 288 Vertical "Red Beds" near Colorado City, Garden of the Gods to the left; ridge of Niobrara limestone to right. El Paso County, Colorado. circa 1895. Plate 17-A in U.S. Geological Survey. Professional paper 52. 1906. #1:/Devils Tower National Monument/ric00290 ID. Russell, I.C. 290 Devils Tower National Monument, Wyoming. Devils Tower, viewed from the opposite side of Belle Fourche River. Man on horseback in the lower right. Circa 1885. #1:/Colorado-Professional paper 52/ric00291 ID. Russell, I.C. 291 "Dakota" hogback at Canyon [City], valley of "Red Beds" and slopes of Morrison beds to left: minor hogbacks of Timpas limestone to right. Fremont County, Colorado. circa 1895. Plate 5-A in U.S. Geological Survey. Professional paper 52. 1906. #1:/Colorado-Professional Paper 32/ric00298 ID. Russell, I.C. 298 Bone bearing sandstone in middle of Morrison formation, in Garden Park, north of Canyon [City], Fremont County, Colorado. NLT 1898. Plate 37-B in U.S. Geological Survey. Professional paper 32. 1905, plate 10-B in Professional paper 52. 1906. #1:/Washington-Bulletin 108/ric00308 ID. Russell, I.C. 308 Yakima Canyon, looking toward Kittitas Valley. Kitteras County, Washington. 1892. Plate 7 in US Geological Survey Bulletin 108. 1893. #1:/Washington-Bulletin 108/ric00329 ID. Russell, I.C. 329 Stream Terraces, Foster Creek, Douglas County, Washington. 1892. Plate 11 in US Geological Survey Bulletin 108. 1893. #1:/Washington-Bulletin 108/ric00338 ID. Russell, I.C. 338 Near the head of Lake Chelan, looking west. Okanogan County, Washington. 1892. Plate 9 in US Geological Survey Bulletin 108. 1893. #1:/Washington-Bulletin 108/ric00342 ID. Russell, I.C. 342 West wall of Grand Coulee. Douglas County, Washington. 1892. Plate 12 in US Geological Survey Bulletin 108. 1893. #1:/Washington-Bulletin 108/ric00345 ID. Russell, I.C. 345 Topinish Landslide from below. Twenty miles southeast of North Yakima Washington. Yakima County, Washington. 1892. Plate 5 in US Geological Survey Bulletin 108. 1893. #1:/Washington-Bulletin 108/ric00349 ID. Russell, I.C. 349 Topinish Landslide from above. Twenty miles southeast of North Yakima Washington. Yakima County, Washington. 1892. Plate 6 in US Geological Survey Bulletin 108. 1893. #1:/Washington-Bulletin 108/ric00350 ID. Russell, I.C. 350 Talus slopes on cliffs, left by Simcoe Landslide. Twenty miles southeast of North Yakima, Washington. Yakima County, Washington. 1892. Plate 4 in US Geological Survey Bulletin 108. 1893. #1:/Washington-Bulletin 108/ric00358 ID. Russell, I.C. 358 Gravel terrace in canyon of the Columbia, near Chelan Crossing. Douglas County, Washington. 1892. Plate 8 in US Geological Survey Bulletin 108. 1893. #1:/Washington-Bulletin 108/ric00360 ID. Russell, I.C. 360 Boulders of Basalt on great plain of Columbia. Okanogan County, Washington. 1892. Plate 10 in US Geological Survey Bulletin 108. 1893. #1:/Alaska-Professional paper 64/ric00388 ID. Russell, I.C. 388 Not a valid photo - jm 07-24-02 #1:/Alaska Glacier/ric00389 ID. Russell, I.C. 389 Moraines on Libby Glacier. Mt. St. Elias. Alaska Gulf region, Alaska. cc 1892. #1:/Alaska Glacier/ric00390 ID. Russell, I.C. 390 Hubbard Glacier, head of Yakutat Bay. Snow on mountain retouched on negative. Yakutat district, Alaska Gulf region, Alaska. cc 1892. Alaska Gulf region, Alaska. cc 1892. #1:/Alaska Glacier/ric00391 ID. Russell, I.C. 391 Head of Yakutat Bay. Looking southwest from Haenke Island. Yakutat district, Alaska Gulf region, Alaska. cc 1892. #1:/Alaska Glacier/ric00392 ID. Russell, I.C. 392 Mt. St. Elias. Looking from north side of forest covered moraines on Malaspina Glacier, near Icy Bay. Yakutat district, Alaska Gulf region, Alaska. cc 1892. #1:/Alaska Glacier/ric00397 ID. Russell, I.C. 397 White bluffs of the Columbia. Washington. cc 1892. #1:/Alaska Glacier/ric00398 ID. Russell, I.C. 398 Mt. St. Elias from Agassiz Glacier. Yakutat district, Alaska Gulf region, Alaska. cc 1892. #1:/Alaska-Professional paper 64/ric00399 ID. Russell, I.C. 399 Hubbard Glacier from Osier Island, Yakutat district, Alaska Gulf region, Alaska. 1891. Plate 14-A in U.S. Geological Survey. Professional paper 64. 1909. #1:/Montana-Professional paper 27/ric00402 ID. Russell, I.C. 402 Canyon of Snake River, looking north from point near Wawa (?), shows Columbia River basalt 2,000 feet thick. Clearwater escarpment is seen in background. Nez Perce County, Idaho. circa 1900. Plate 13 in U.S. Geological Survey. Professional paper 27. 1904. #1:/Montana-Professional paper 27/ric00403 ID. Russell, I.C. 403 Lewiston plateau, looking north from near Waha, Clearwater escarpment and Uniontown plateau are seen the background. Nez Perce County, Idaho. circa 1900. Plate 14 in U.S. Geological Survey. Professional paper 27. 1904. #1:/Idaho-Bulletin 199/ric00442 ID. Russell, I.C. 442 Market Lake Crater, Jefferson County, Idaho 1901 Plate 16-A in US Geological Survey Bulletin 199. 1902. #1:/Idaho-Bulletin 199/ric00443 ID. Russell, I.C. 443 Stratified Lapilli, Market Lake Crater, Jefferson County, Idaho. 1901. Plate 16-B in US Geological Survey Bulletin 199. 1902. #1:/Idaho-Bulletin 199/ric00447 ID. Russell, I.C. 447 Pressure ridge in Snake River Lava near Market Lake Craters, Jefferson County, Idaho. 1901. Plate 15-A in US Geological Survey Bulletin 199. 1902. #1:/Alaska Glacier/ric00486 ID. Russell, I.C. 486 Hubbard Glacier, head of Yakutat Bay. Yakutat district, Alaska Gulf region, Alaska. cc 1901. #1:/Alaska Glacier/ric00487 ID. Russell, I.C. 487 On the Yakima River. Washington. cc 1901. #1:/Alaska Glacier/ric00488 ID. Russell, I.C. 488 Lucia Glacier. Yakutat district, Alaska Gulf region, Alaska. cc 1901. #1:/Alaska Glacier/ric00489 ID. Russell, I.C. 489 No Caption. Washington. cc 1901. #1:/Alaska Glacier/ric00494 ID. Russell, I.C. 494 Landslide. Washington. cc 1901. #1:/Alaska Glacier/ric00495 ID. Russell, I.C. 495 Libby Glacier near Mt. St. Elias. Moraines. Yakutat district, Alaska Gulf region, Alaska. cc 1901. #1:/Alaska Glacier/ric00496 ID. Russell, I.C. 496 Mountains west of Mt. St. Elias looking from Chaix Hills. Yakutat district, Alaska Gulf region, Alaska. cc 1901. #1:/Alaska Glacier/ric00497 ID. Russell, I.C. 497 Agassiz Glacier. Yakutat district, Alaska Gulf region, Alaska. cc 1901. #1:/Alaska Glacier/ric00505 ID. Russell, I.C. 505 Mt. St. Elias from Malaspina Glacier looking from Chaix Hills about 10 miles from Mt. St. Elias. Yakutat district, Alaska Gulf region, Alaska. cc 1891. Plate 5 in U.S. Geological Survey 13th Annual Report part 2. 1893. #1:/Alaska Glacier/ric00512 ID. Russell, I.C. 512 Mt. St. Elias from Libbey Glacier. Yakutat district, Alaska Gulf region, Alaska. cc 1891. #1:/Alaska Glacier/ric00520 ID. Russell, I.C. 520 Mt. St. Elias from north border of Malaspina Glacier. Yakutat district, Alaska Gulf region, Alaska. cc 1901. #1:/Alaska Glacier/ric00526 ID. Russell, I.C. 526 Mountains west of Mt. St. Elias from Chaix Hills. Photo by F.G. Warner. Yakutat district, Alaska Gulf region, Alaska. cc 1901. #1:/Alaska Glacier/ric00536 ID. Russell, I.C. 536 Mt. St. Elias from north border of Malaspina Glacier. Yakutat district, Alaska Gulf region, Alaska. cc 1901. #1:/Alaska Glacier/ric00538 ID. Russell, I.C. 538 Mt. St. Elias from east side of Agassiz Glacier. Yakutat district, Alaska Gulf region, Alaska. cc 1901. #1:/Alasks-Professional paper 45/ric00539 ID. Russell, I.C. 539 Mount St. Elias from the south, with men and sled, Alaska, adequate substitute for plate 8-A in U.S. Geological Survey. Professional paper 45. 1906. #1:/Alaska Glacier/ric00550 ID. Russell, I.C. 550 Surface of central portion of Malaspina Glacier. Yakutat district, Alaska Gulf region, Alaska. cc 1891. Plate 16 in U.S. Geological Survey 13th Annual Report part 2. 1893. Plate 9-B in TARR Alaskan Glaicer Studies. 1914. #1:/Alaska Glacier/ric00551 ID. Russell, I.C. 551 Mt. St. Elias from western end of Samovar Hills, east side of Agassiz Glacier. Yakutat district, Alaska Gulf region, Alaska. cc 1901. #1:/Alaska Glacier/ric00556 ID. Russell, I.C. 556 Turner Glacier. Head of Yakutat Bay. Yakutat district, Alaska Gulf region, Alaska. cc 1891. Plate 20 in U.S. Geological Survey 13th Annual Report part 2. 1893. #1:/Alaska Glacier/ric00563 ID. Russell, I.C. 563 Lake on the Malaspina Glacier. Yakutat district, Alaska Gulf region, Alaska. cc 1891. #1:/Alaska Glacier/ric00564 ID. Russell, I.C. 564 In the Chaix Hills. Yakutat district, Alaska Gulf region, Alaska. cc 1891. #1:/Alaska Glacier/ric00565 ID. Russell, I.C. 565 Looking northwest from Chaix Hills. Yakutat district, Alaska Gulf region, Alaska. cc 1891. #1:/Alaska Glacier/ric00566 ID. Russell, I.C. 566 Mt. St. Elisas. Yakutat district, Alaska Gulf region, Alaska. cc 1891. #1:/Alaska Glacier/ric00567 ID. Russell, I.C. 567 Mt. St. Elisas. Yakutat district, Alaska Gulf region, Alaska. cc 1891. Plate 12-A in TARR Alaskan Glaicer Studies. 1914. #1:/Alaska-Images/ric00568 ID. Russell, I.C. 568 I.C. Russell leading a U.S. Geological Survey party across the moraines of the Malaspina Glacier. Yakutat district, Alaska Gulf region, Alaska. c. 1890. Upper photograph page 25, Images of the U.S. Geological Survey, 1879-1979. #1:/Russel I.C. Collection/ric00610 ID. Russell, I.C. 610 Natives [Indians] and dwelling. Ounalaska, Aleutian region, Alaska. cc 1891. #1:/Russel I.C. Collection/ric00624 ID. Russell, I.C. 624 Natives [Esquimo] Houses, St. Michaels. Aleutian region, Alaska. cc 1891. #1:/Russel I.C. Collection/ric00625 ID. Russell, I.C. 625 Natives [Esquimo] men at St. Michaels. Aleutian region, Alaska. cc 1891. #1:/Russel I.C. Collection/ric00645 ID. Russell, I.C. 645 Natives [Esquimo] women at Port Clarence. Seward Peninsula region, Alaska. cc 1885. #1:/Russel I.C. Collection/ric00646 ID. Russell, I.C. 646 Natives [Esquimo] driving fish at Crantley Harbor. Seward Peninsula region, Alaska. cc 1885. #1:/Russel I.C. Collection/ric00649 ID. Russell, I.C. 649 Possible Whaling Ship off Seward Peninsula. Seward Peninsula region, Alaska. cc 1885. #1:/Russel I.C. Collection/ric00653 ID. Russell, I.C. 653 Natives (Eskimo) and Houses near East Cape, Siberia. Siberia, Russia. cc 1885. #1:/Russel I.C. Collection/ric00656 ID. Russell, I.C. 656 Natives (Eskimo) near East Cape, Siberia. Siberia, Russia. cc 1885. #1:/Russel I.C. Collection/ric00657 ID. Russell, I.C. 657 View in Senavine Straits. Siberia, Russia. July 12, 1885. #1:/Russel I.C. Collection/ric00664 ID. Russell, I.C. 664 Trading Station above Cape Lisburn. Alaska. cc 1885. #1:/Russel I.C. Collection/ric00665 ID. Russell, I.C. 665 Natives [Eskimo] at Point Barrow. Barrow district, Northern Alaska region, Alaska. cc 1885. #1:/Oregon-Bulletin 217/ric00707 ID. Russell, I.C. 707 Exposure of volcanic dust of Tertiary Age, near Beulah, Malheur County, Oregon. 1902. Plate 17-A in US Geological Survey Bulletin 217. 1903. #1:/Oregon-Bulletin 217/ric00709 ID. Russell, I.C. 709 Exposure of volcanic dust of Tertiary Age, near Beulah, Malheur County, Oregon. 1902. Plate 17-B in US Geological Survey Bulletin 217. 1903. #1:/Oregon-Bulletin 217/ric00711 ID. Russell, I.C. 711 Exposures of Tertiary Lake beds, Owyhee River near mouth of Jordan Creek, Malheur County, Oregon. 1902. Plate 18-A in US Geological Survey Bulletin 217. 1903. #1:/Oregon-Bulletin 217/ric00713 ID. Russell, I.C. 713 Exposures of Tertiary Lake beds, Owyhee River near mouth of Jordan Creek, Malheur County, Oregon. 1902. Plate 18-B in US Geological Survey Bulletin 217. 1903. #1:/Oregon-Bulletin 217/ric00716 ID. Russell, I.C. 716 Weathering of thin sheet of basalt above soft strata, Mule, Harney County, Oregon. 1902. Plate 16-A in US Geological Survey Bulletin 217. 1903. #1:/Oregon-Bulletin 217/ric00717 ID. Russell, I.C. 717 Weathering of thick sheet of basalt above thick beds of soft material, Snake River Canyon, opposite Enterprise, Owyhee County, Idaho. 1902. Plate 16-B in US Geological Survey Bulletin 217. 1903. #1:/Oregon-Bulletin 217/ric00719 ID. Russell, I.C. 719 Eolian mounds on border of playa, near Iron Mountain, Malheur County, Oregon. 1902. Plate 2-B in US Geological Survey Bulletin 217. 1903. #1:/Oregon-Bulletin 217/ric00720 ID. Russell, I.C. 720 South shore of Malheur Lake, Malhuer County, Oregon. Salacornia growing in alkali. 1902. Plate 2-A in US Geological Survey Bulletin 217. 1903. #1:/Oregon-Bulletin 217/ric00723 ID. Russell, I.C. 723 Fissured pahoehoe lava, Jordan Craters, Malheur County, Oregon. 1902. Plate 12-A in US Geological Survey Bulletin 217. 1903. #1:/Oregon-Bulletin 217/ric00726 ID. Russell, I.C. 726 Pressure ridge in recent lava, Diamond Craters, Harney County, Oregon. 1902. Plate 15- A in US Geological Survey Bulletin 217. 1903. #1:/Oregon-Bulletin 217/ric00727 ID. Russell, I.C. 727 Pressure dome in recent lava, Jordan Craters, Malheur County, Oregon. 1902. Plate 14-B in US Geological Survey Bulletin 217. 1903. #1:/Oregon-Bulletin 217/ric00729 ID. Russell, I.C. 729 Scoria and bomb cones, "The Ice Wells," Cinder Buttes, Ada County, Idaho. 1902. Plate 4-B in US Geological Survey Bulletin 217. 1903. #1:/Oregon-Bulletin 217/ric00733 ID. Russell, I.C. 733 Driblet cone or oven, Jordan Craters, Malheur County, Oregon. 1902. Plate 11-A in US Geological Survey Bulletin 217. 1903. #1:/Oregon-Bulletin 217/ric00734 ID. Russell, I.C. 734 Driblet cone, Diamond Craters, Harney County, Oregon. 1902. Plate 11-B in US Geological Survey Bulletin 217. 1903. #1:/Oregon-Bulletin 217/ric00735 ID. Russell, I.C. 735 Lava Gutter, Jordan Craters, Malheur County, Oregon.1902. Plate 14-B in US Geological Survey Bulletin 217. 1903. #1:/Oregon-Bulletin 217/ric00738 ID. Russell, I.C. 738 AA Lava surface, Cinder Buttes, Ada County, Idaho. 1902. Plate 12-B in US Geological Survey Bulletin 217. 1903. #1:/Oregon-Bulletin 217/ric00739 ID. Russell, I.C. 739 Margin of lava stream, Cinder Buttes, Ada County, Idaho. 1902. Plate 13-B in US Geological Survey Bulletin 217. 1903. #1:/Oregon-Bulletin 217/ric00740 ID. Russell, I.C. 740 Margin of lava stream, Cinder Buttes, Ada County, Idaho. 1902. Plate 13-A in US Geological Survey Bulletin 217. 1903. #1:/Oregon-Bulletin 217/ric00741 ID. Russell, I.C. 741 Crags of tuff on lava flow, Cinder Buttes, Ada County, Idaho. 1902. Plate 3-A in US Geological Survey Bulletin 217. 1903. #1:/Oregon-Bulletin 217/ric00742 ID. Russell, I.C. 742 Pinnacle of scoria, Cinder Buttes, Ada County, Idaho. 1902. Plate 3-B in US Geological Survey Bulletin 217. 1903. #1:/Oregon-Bulletin 217/ric00745 ID. Russell, I.C. 745 Island of lapilli in lava stream, Cinder Buttes, Ada County, Idaho. 1902. Plate 4-A in US Geological Survey Bulletin 217. 1903. #1:/Oregon-Bulletin 217/ric00747 ID. Russell, I.C. 747 Volcanic bomb, length 13 feet, greatest diameter, 8 inches. Cinder Buttes, Ada County, Idaho. 1902. Plate 8 in US Geological Survey Bulletin 217. 1903. #1:/Pennsylvania-Bulletin 256/srw00018 ID. Stone, R.W. 18 General topography of Elders Ridge quadrangle: Elderton in middle distance. Armstrong County, Pennsylvania. 1904. Plate 2-A in US. Geological Survey. Bulletin 256. 1905. #1:/Idaho-Bulletin 199/ric00749 ID. Russell, I.C. 749 Kuna Butte near Cleft, Elmore County, Idaho. 1901. Plate 17-A in US Geological Survey Bulletin 199. 1902. #1:/Idaho-Bulletin 199/ric00750 ID. Russell, I.C. 750 Crater rings near Cleft, Elmore County, Idaho. 1901. Plate 17-B in US Geological Survey Bulletin 199. 1902. #1:/Idaho-Bulletin 199/ric00753 ID. Russell, I.C. 753 Snake River Canyon below mouth of Rattlesnake Creek, looking west. Elmore County, Idaho. 1901. Plate 2-A in US Geological Survey Bulletin 199. 1902. #1:/Idaho-Bulletin 199/ric00754 ID. Russell, I.C. 754 Block of columnar lava Snake River Canyon. Idaho. 1901. Plate 8-B in US Geological Survey Bulletin 199. 1902. #1:/Idaho-Bulletin 199/ric00756 ID. Russell, I.C. 756 Remnant of Snake River Lava, King Hill Creek, Elmore County, Idaho. 1901. Plate 8-A in US Geological Survey Bulletin 199. 1902. #1:/Idaho-Bulletin 199/ric00757 ID. Russell, I.C. 757 Water-worn masses of basalt in Snake River Canyon near Hagerman, Gooding County, Idaho. 1901. Plate 25-B in US Geological Survey Bulletin 199. 1902. #1:/Idaho-Bulletin 199/ric00759 ID. Russell, I.C. 759 The Thousand Springs, Snake River Canyon,. The water issues from the open textured basal portion of the lava sheet and flows over compact clay and volcanic lapilli, Height of falls is 180 feet. Gooding County, Idaho 1901. Plate 3-A in US Geological Survey Bulletin 199. 1902. #1:/Idaho-Bulletin 199/ric00760 ID. Russell, I.C. 760 Snake River Canyon near Hagerman, looking northwest. Bluffs of white sand and clay. Gooding County, Idaho Plate 2-B in US Geological Survey Bulletin 199. 1902. #1:/Idaho-Bulletin 199/ric00761 ID. Russell, I.C. 761 Little Canyon, looking south into Snake River Canyon. Gooding County, Idaho. 1901. Plate 23-B in US Geological Survey Bulletin 199. 1902. #1:/Idaho-Bulletin 199/ric00763 ID. Russell, I.C. 763 North wall of Snake River Canyon near mouth of Little Canyon, Gooding County, Idaho. 1901. Plate 9-B in US Geological Survey Bulletin 199. 1902. #1:/Idaho-Bulletin 199/ric00764 ID. Russell, I.C. 764 Cinder Buttes, looking southeast, highest butte 600 feet. Blaine County, Idaho 1901. Plate 10 in US Geological Survey Bulletin 199. 1902. #1:/Idaho-Bulletin 199/ric00769 ID. Russell, I.C. 769 Lava cone, Snake River Plains, near Arco, Butte County, Idaho. 1901. Plate 18 in US Geological Survey Bulletin 199. 1902. #1:/Idaho-Bulletin 199/ric00770 ID. Russell, I.C. 770 Pressure ridges in Snake River Lava near Big Butte, Butte County, Idaho. 1901 Plate 15- B in US Geological Survey Bulletin 199. 1902. #1:/Idaho-Bulletin 199/ric00771 ID. Russell, I.C. 771 East butte, an old rhyolitic volcano surrounded by basalt. Bingham County, Idaho. 1901. Plate 5- A in US Geological Survey Bulletin 199. 1902. #1:/Idaho-Bulletin 199/ric00772 ID. Russell, I.C. 772 Recent stream erosion near Howell, Boise County, Idaho. 1901. Plate 25-A in US Geological Survey Bulletin 199. 1902. #1:/Idaho-Bulletin 199/ric00773 ID. Russell, I.C. 773 Big Butte, an old rhyolitic volcano surrounded by basalt. Typical highway. Butte County, Idaho. 1901. Plate 5-B in US Geological Survey Bulletin 199. 1902. #1:/Idaho-Bulletin 199/ric00775 ID. Russell, I.C. 775 North wall of Snake River Canyon. Butte of lacustral material capped by lava. Ada County, Idaho. 1901. Plate 6-B in US Geological Survey Bulletin 199. 1902. #1:/Idaho-Bulletin 199/ric00776 ID. Russell, I.C. 776 Lava resting on undisturbed lake beds, Canyon Creek, Elmore County, Idaho. 1901. Plate 21 in US Geological Survey Bulletin 199. 1902. #1:/Oregon-Bulletin 252/ric00777 ID. Russell, I.C. 777 Erosion Columns of Volcanic Tuff, Cottonwood Canyon, near Harpers Flat, Malheur County, Oregon. 1903. Plate 2-B in U.S. Geological Survey. Bulletin 252. 1905. #1:/Oregon-Bulletin 252/ric00778 ID. Russell, I.C. 778 Concentric Jointing in rhyolitic Lava, Crowley Creek, Malhuer County, Oregon. 1903. Plate 2-A in U.S. Geological Survey. Bulletin 252. 1905. #1:/Oregon-Bulletin 252/ric00779 ID. Russell, I.C. 779 Columnar rhyolitic tuff at north end of Gilchrist Valley, near Hampton Butte, Crook County, Oregon. 1903. Plate 3 in U.S. Geological Survey. Bulletin 252. 1905. #1:/Oregon-Bulletin 252/ric00780 ID. Russell, I.C. 780 Eroded John Day beds, near Logan Butte, Crook County, Oregon. 1903. Plate 4-A in U.S. Geological Survey. Bulletin 252. 1905. #1:/Oregon-Bulletin 252/ric00782 ID. Russell, I.C. 782 Eroded John Day beds, near Logan Butte, Crook County, Oregon. 1903. Plate 4-B in U.S. Geological Survey. Bulletin 252. 1905. #1:/Oregon-Bulletin 252/ric00784 ID. Russell, I.C. 784 Logan Butte, butte of lake beds capped by rhyolite. Crook County, Oregon. 1903. Plate 5-B in U.S. Geological Survey. Bulletin 252. 1905. #1:/Oregon-Bulletin 252/ric00785 ID. Russell, I.C. 785 Jointed rhyolitic tuff at summit of Logan Butte, Crook County, Oregon. 1903. Plate 5-A in U.S. Geological Survey. Bulletin 252. 1905. #1:/Oregon-Bulletin 252/ric00786 ID. Russell, I.C. 786 Wall of recently eroded stream channel in alluvium, near Price, Crook County, Oregon. 1903. Plate 6A in U.S. Geological Survey. Bulletin 252. 1905. #1:/Oregon-Bulletin 252/ric00787 ID. Russell, I.C. 787 Wall of recently eroded stream channel in alluvium, near Price, Crook County, Oregon. 1903. Plate 6-A in U.S. Geological Survey. Bulletin 252. 1905. #1:/Oregon-Bulletin 252/ric00788 ID. Russell, I.C. 788 Andesitic agglomerate on east side of Hampton Butte, Crook County, Oregon. 1903. Plate 7 in U.S. Geological Survey. Bulletin 252. 1905. #1:/Oregon-Bulletin 252/ric00789 ID. Russell, I.C. 789 Weathered basaltic cinder cone near Button Spring, Lake County, Oregon. 1903. Plate 8- C in U.S. Geological Survey. Bulletin 252. 1905. #1:/Oregon-Bulletin 252/ric00791 ID. Russell, I.C. 791 Weathered basaltic cinder cone with summit lava flow near Button Spring, Lake County, Oregon. 1903. Plate 8a in U.S. Geological Survey. Bulletin 252. 1905. #1:/Oregon-Bulletin 252/ric00792 ID. Russell, I.C. 792 Weathered basaltic cinder cone near Button Spring, Lake County, Oregon. 1903. Plate 8- B in U.S. Geological Survey. Bulletin 252. 1905. #1:/Oregon-Bulletin 252/ric00793 ID. Russell, I.C. 793 Remnant of basalt sheet, six miles west of Prineville Crook County, Oregon. 1903. Plate 9-B in U.S. Geological Survey. Bulletin 252. 1905. #1:/Oregon-Bulletin 252/ric00794 ID. Russell, I.C. 794 Opal Canyon, Crooked River, looking north. Crook County, Oregon. 1903. Plate 11-A in U.S. Geological Survey. Bulletin 252. 1905. #1:/Oregon-Bulletin 252/ric00796 ID. Russell, I.C. 796 Opal Canyon, Crooked River, showing basalt of inner canyon in contact with stratified beds of outer canyon. Crook County, Oregon. 1903. Plate 11-B in U.S. Geological Survey. Bulletin 252. 1905. #1:/Oregon-Bulletin 252/ric00797 ID. Russell, I.C. 797 Jointed basalt in wall of inner canyon near Opal Spring, Crooked River, Crook County, Oregon. 1903. Plate 12 in U.S. Geological Survey. Bulletin 252. 1905. #1:/Oregon-Bulletin 252/ric00800 ID. Russell, I.C. 800 Canyon of Deschutes River, near mouth of Crooked River looking south. Crook County, Oregon. 1903. Plate 13-B in U.S. Geological Survey. Bulletin 252. 1905. #1:/Oregon-Bulletin 252/ric00801 ID. Russell, I.C. 801 Erosion column on north wall of Monument Canyon, Crooked River, Crook County, Oregon. 1903. Plate 10 in U.S. Geological Survey. Bulletin 252. 1905. #1:/Oregon-Bulletin 252/ric00802 ID. Russell, I.C. 802 Canyon of Deschutes River, near mouth of Crooked River showing remnant of basalt in canyon excavated in stratified deposits. Crook County, Oregon. 1903. Plate 13-A in U.S. Geological Survey. Bulletin 252. 1905. #1:/Oregon-Bulletin 252/ric00804 ID. Russell, I.C. 804 Black Butte, near Sisters, Crook County, Oregon. 1903. Plate 14-A in U.S. Geological Survey. Bulletin 252. 1905. #1:/Oregon-Bulletin 252/ric00805 ID. Russell, I.C. 805 South Sister Peak, looking southeast. Lane-Deschutes Counties, Oregon. 1903. Plate 19- A in U.S. Geological Survey. Bulletin 252. 1905. #1:/Oregon-Bulletin 252/ric00806 ID. Russell, I.C. 806 West Sister Peak,Diller Glacier to left and Hayden Glacier to right of center. Deschutes County, Oregon. 1903. Plate 19-B in U.S. Geological Survey. Bulletin 252. 1905. #1:/Oregon-Bulletin 252/ric00808 ID. Russell, I.C. 808 Recently abandoned moraine on south side of Hayden Glacier; West Sister Peak in background, looking west. Deschutes County, Oregon. 1903. Plate 23-B in U.S. Geological Survey. Bulletin 252. 1905. #1:/Oregon-Bulletin 252/ric00809 ID. Russell, I.C. 809 Lower margin of n'ev'e on Hayden Glacier; North Sister Peak ih background. Looking north. Deschutes County, Oregon. 1903. Plate 21 in U.S. Geological Survey. Bulletin 252. 1905. #1:/Oregon-Bulletin 252/ric00810 ID. Russell, I.C. 810 Double-crested moraine on south side of Hayden Glacier, looking west toward West Sister Peak. Deschutes County, Oregon. 1903. Plate 21 in U.S. Geological Survey. Bulletin 252. 1905. #1:/Oregon-Bulletin 252/ric00811 ID. Russell, I.C. 811 North Sister Peak and n'ev'e of Hayden Glacier. Looking north. Deschutes County, Oregon. 1903. Plate 23-A in U.S. Geological Survey. Bulletin 252. 1905. #1:/Oregon-Bulletin 252/ric00812 ID. Russell, I.C. 812 Double-crested moraine on south side of Hayden Glacier, looking east. Deschutes County, Oregon. 1903. Plate 22-B in U.S. Geological Survey. Bulletin 252. 1905. #1:/Oregon-Bulletin 252/ric00813 ID. Russell, I.C. 813 Glacier cornices on wall of crevasse at head of Hayden Glacier, looking north. Deschutes County, Oregon. 1903. Plate 23-B in U.S. Geological Survey. Bulletin 252. 1905. #1:/Oregon-Bulletin 252/ric00815 ID. Russell, I.C. 815 N'ev'e of Diller Glacier and South Sister Peak. Deschutes County, Oregon. 1903. Plate 20-A in U.S. Geological Survey. Bulletin 252. 1905. #1:/Oregon-Bulletin 252/ric00816 ID. Russell, I.C. 816 Lower margin of Diller Glacier; Broken Top in background. Looking South. Panorama with ric00815. Deschutes County, Oregon. 1903. Plate 20-B in U.S. Geological Survey. Bulletin 252. 1905. #1:/Oregon-Bulletin 252/ric00821 ID. Russell, I.C. 821 Lava butte, near Benham Falls, Crook County, Oregon. 1903. Plate 18 in U.S. Geological Survey. Bulletin 252. 1905. #1:/Oregon-Bulletin 252/ric00822 ID. Russell, I.C. 822 Benham Falls, Deschutes River, Deschutes County, Oregon. 1903. Plate 16-B in U.S. Geological Survey. Bulletin 252. 1905. #1:/Oregon-Bulletin 252/ric00824 ID. Russell, I.C. 824 Fall on Pauline Creek, near Pauline Lake, flowing over volcanic agglomerate. Crook County, Oregon. 1903. Plate 15-B in U.S. Geological Survey. Bulletin 252. 1905. #1:/Oregon-Bulletin 252/ric00825 ID. Russell, I.C. 825 Amphitheater of Mount Newberry, from west shore of Pauline Lake, cliffs on southeast side. Crook County, Oregon. 1903. Plate 15-A in U.S. Geological Survey. Bulletin 252. 1905. #1:/Oregon-Bulletin 252/ric00827 ID. Russell, I.C. 827 Crater No. 5 Mount Newberry, margin of obsidian lava bed, looking north. Crook County, Oregon. 1903. Plate 17-A in U.S. Geological Survey. Bulletin 252. 1905. #1:/Oregon-Bulletin 252/ric00828 ID. Russell, I.C. 828 Crater No. 5 Mount Newberry, massive extrusion of lava, forming crags: looking northeast. Crook County, Oregon. 1903. Plate 17-B in U.S. Geological Survey. Bulletin 252. 1905. #1:/Oregon-Bulletin 252/ric00831 ID. Russell, I.C. 831 Amphitheater of Mount Newberry, from west shore of Pauline Lake, crater No. 2. Crook County, Oregon. 1903. Plate 15-B in U.S. Geological Survey. Bulletin 252. 1905. #1:/Oregon-Bulletin 252/ric00832 ID. Russell, I.C. 832 Odell Butte, near Odell Lake, Klamath County, Oregon. 1903. Plate 14-A in U.S. Geological Survey. Bulletin 252. 1905. #1:/Alaska Glacier/csr00005 ID. Capps, S.R. 5 Nabesna Glacier. Sanford district, Copper River region, Alaska. cc 1906. #1:/Alaska Glacier/csr00006 ID. Capps, S.R. 6 Nabesna Glacier. Sanford district, Copper River region, Alaska. cc 1906. #1:/Alaska Glacier/csr00009 ID. Capps, S.R. 9 Glaciers at head of Camp Creek. Sanford district, Copper River region, Alaska. cc 1906. #1:/Alaska Glacier/csr00010 ID. Capps, S.R. 10 Nabesna River at mouth of Platinum Creek. Sanford district, Copper River region, Alaska. cc 1906. #1:/Alaska Glacier/csr00011 ID. Capps, S.R. 11 Cliff Glacier north of Copper Pass. Sanford district, Copper River region, Alaska. cc 1906. Figure 3 is Journal of Geology v.18 no 1. p41. 1910. #1:/Alaska Glacier/csr00012 ID. Capps, S.R. 12 Glaciers at head at head to trail (Notch) Creek. Sanford district, Copper River region, Alaska. cc 1906. #1:/Alaska Glacier/csr00013 ID. Capps, S.R. 13 Glaciers at head of first creek east of Trail Creek. Sanford district, Copper River region, Alaska. cc 1906. #1:/Alaska Glacier/csr00014 ID. Capps, S.R. 14 Lower end of Nebesna Glacier. Sanford district, Copper River region, Alaska. cc 1906. Figure 2 is Journal of Geology v.18 no 1. p40. 1910. #1:/Alaska Glacier/csr00015 ID. Capps, S.R. 15 Lower end of Chisana Glacier. Sanford district, Copper River region, Alaska. cc 1906. Figure 5 is Journal of Geology v.18 no 1. p44. 1910. #1:/Alaska Glacier/csr00016 ID. Capps, S.R. 16 Lower end of Chisana Glacier. Sanford district, Copper River region, Alaska. cc 1906. Figure 5 is Journal of Geology v.18 no 1. p44. 1910. #1:/Alaska Glacier/csr00093 ID. Capps, S.R. 93 Panorama of Russell glacier. Sanford district, Copper River region, Alaska. cc 1906. Figure 7 is Journal of Geology v.18 no 1. p49. 1910. #1:/Alaska Glacier/csr00094 ID. Capps, S.R. 94 Panorama of Russell glacier. Sanford district, Copper River region, Alaska. cc 1906. #1:/Alaska Glacier/csr00095 ID. Capps, S.R. 95 Panorama of Russell glacier. Sanford district, Copper River region, Alaska. cc 1906. #1:/Alaska Glacier/csr00096 ID. Capps, S.R. 96 Panorama of Russell glacier. Sanford district, Copper River region, Alaska. cc 1906. Figure 9 is Journal of Geology v.18 no 1. p51. 1910. #1:/Alaska Glacier/csr00097 ID. Capps, S.R. 97 Panorama of Russell glacier. Sanford district, Copper River region, Alaska. cc 1906. #1:/Alaska Glacier/csr00098 ID. Capps, S.R. 98 Panorama of Russell glacier. Sanford district, Copper River region, Alaska. cc 1906. #1:/Alaska Glacier/csr00099 ID. Capps, S.R. 99 Panorama of Russell glacier. Sanford district, Copper River region, Alaska. cc 1906. #1:/Alaska-Bulletin 448/csr00115 ID. Capps, S.R. 115 North end of Porphyry Peak, showing inclusions of black shale in porphyry. Chitina district, Copper River region, Alaska. 1908. Plate 11-A in U.S. Geological Survey. 448. 1911. #1:/Alaska-Bulletin 448/csr00126 ID. Capps, S.R. 126 Boulders in conglomerate at base of Kennicott formation on south branch of Nikolai creek Chitina district, Copper River region, Alaska. 1908. Plate 6-A in U.S. Geological Survey. 448. 1911. #1:/Alaska-Bulletin 448/csr00127 ID. Capps, S.R. 127 Sandstone of Kennicott formation on ridge south of Nikolai Mine. Chitina district, Copper River region, Alaska. 1908. Plate 6-B in U.S. Geological Survey. 448. 1911. #1:/Alaska-Bulletin 448/csr00129 ID. Capps, S.R. 129 Head of rock glacier on Little Nikolai creek, the cirque like valley, with its abundant talus slopes feeding down to the rock glacier, is free from true glacial ice. Chitina district, Copper River region, Alaska. 1908. Plate 9-B in U.S. Geological Survey. 448. 1911. #1:/Alaska-Bulletin 448/csr00139 ID. Capps, S.R. 139 Detail of surface of rock glacier on tributary of McCarthy creek, the rounded ridges in the foreground are the concentric ridges which characterize the lower portion of the flow. Chitina district, Copper River region, Alaska. 1908. Plate 10-B in U.S. Geological Survey. 448. 1911. #1:/Alaska-Bulletin 501/csr00184 ID. Capps, S.R. 184 Gravel remnants overlying Totatlakina schist on high ridge between Nenana River and Chicken Creek. Fairbanks district, Yukon region, Alaska. 1910. Plate 3-A in U.S. Geological Survey. Bulletin 501. 1912. #1:/Alaska-Bulletin 501/csr00195 ID. Capps, S.R. 195 Tilted Tertiary coal beds lying against the south side of Jumbo Dome. Fairbanks district, Yukon region, Alaska. 1910. Plate 7-A in U.S. Geological Survey. Bulletin 501. 1912. #1:/Alaska-Bulletin 501/csr00196 ID. Capps, S.R. 196 Upper portion of the Tertiary coal bearing series, Lignite Creek. The lignite beds near the top of the series are fibrous and woody and form a smaller portion of the total thickness than those near the base. Fairbanks district, Yukon region, Alaska. 1910. Plate 7-B in U.S. Geological Survey. Bulletin 501. 1912. #1:/Alaska-Bulletin 501/csr00200 ID. Capps, S.R. 200 Jumbo Dome from the north, looking up California Creek. The dome is a mass of intrusive andesite, left relief by the erosion of the surrounding schists and Tertiary beds. Fairbanks district, Yukon region, Alaska. 1910. Plate 3-B in U.S. Geological Survey. Bulletin 501. 1912. #1:/Alaska-Bulletin 501/csr00202 ID. Capps, S.R. 202 Tertiary coal bed 20 feet thick on Lignite Creek. The absence of bedding in the upper portion of the bluff is due the burning out of bed which lay just above the white sands. Fairbanks district, Yukon region, Alaska. 1910. Plate 8-B in U.S. Geological Survey. Bulletin 501. 1912. #1:/Alaska-Bulletin 501/csr00203 ID. Capps, S.R. 203 A thick bed of coal on Lignite Creek. Twenty-one feet of coal, in a single bed (stream edge to top of outcrop), shows above the level of stream. Fairbanks district, Yukon region, Alaska. 1910. Plate 8-A in U.S. Geological Survey. Bulletin 501. 1912. #1:/Alaska-Bulletin 501/csr00205 ID. Capps, S.R. 205 Contorted coal bed, upper Healy Creek. Denali district, Yukon region, Alaska. 1910. Plate 6-A in U.S. Geological Survey. Bulletin 501. 1912. #1:/Alaska-Bulletin 501/csr00206 ID. Capps, S.R. 206 Terraces cut in glacial outwash gravels on upper Healy Creek. Denali district, Yukon region, Alaska. 1910. Plate 5-B in U.S. Geological Survey. Bulletin 501. 1912. #1:/Alaska-Bulletin 501/csr00214 ID. Capps, S.R. 214 Near head of Last Chance Creek, showing remnants of glacial gravel benches above the present stream bed. Fairbanks district, Yukon region, Alaska. 1910. Plate 5-A in U.S. Geological Survey. Bulletin 501. 1912 #1:/Alaska-Bulletin 534/csr00253 ID. Capps, S.R. 253 Cache Creek and its gorge, cut through Eocene deposits. The Peters Hills, which border the basin, are composed of slates and graywackes. Yentna district, Cook Inlet region, Alaska. 1911. Plate 11-A in U.S. Geological Survey. Bulletin 534. 1913. #1:/Alaska-Bulletin 534/csr00256 ID. Capps, S.R. 256 Slumping ground on the northwest wall of Cache Creek gorge. Yentna district, Cook Inlet region, Alaska. 1911. Plate 11-B in U.S. Geological Survey. Bulletin 534. 1913. #1:/Alaska-Bulletin 534/csr00258 ID. Capps, S.R. 258 Mouth of Nugget Creek canyon. The benches on the left, showing old levels of the creek, contain workable placers, as does the present bed of the creek. Yentna district, Cook Inlet region, Alaska. 1911. Plate 13-A in U.S. Geological Survey. Bulletin 534. 1913. #1:/Alaska-Bulletin 534/csr00267 ID. Capps, S.R. 267 Eocene sediments on Peters Creek, on the east of Peters Hills. Yentna district, Cook Inlet region, Alaska. 1911. Plate 13-B in U.S. Geological Survey. Bulletin 534. 1913. #1:/Alaska-Bulletin 534/csr00269 ID. Capps, S.R. 269 Placer mining on Discovery claim, Cache Creek. Yentna district, Cook Inlet region, Alaska. 1911. Plate 12-A in U.S. Geological Survey. Bulletin 534. 1913. #1:/Alaska-Bulletin 534/csr00270 ID. Capps, S.R. 270 Peter Hills, with Cache Creek trough in foreground. Yentna district, Cook Inlet region, Alaska. 1911. Plate 4-A in U.S. Geological Survey. Bulletin 534. 1913. #1:/Alaska-Bulletin 534/csr00271 ID. Capps, S.R. 271 Peter Hills, with Cache Creek trough in foreground. Yentna district, Cook Inlet region, Alaska. 1911. Plate 4-A in U.S. Geological Survey. Bulletin 534. 1913. #1:/Alaska-Bulletin 534/csr00272 ID. Capps, S.R. 272 Peter Hills, with Cache Creek trough in foreground. Yentna district, Cook Inlet region, Alaska. 1911. Plate 4-A in U.S. Geological Survey. Bulletin 534. 1913. #1:/Alaska-Bulletin 534/csr00286 ID. Capps, S.R. 286 Pass between Bear and Peters Creeks and a gorge in the slate and greywacke series of Dutch Hills. Yentna district, Cook Inlet region, Alaska. 1911. Plate 7-A in U.S. Geological Survey. Bulletin 534. 1913. #1:/Alaska-Bulletin 534/csr00293 ID. Capps, S.R. 293 Rugged mountains at the head of Granite Creek. The dark colored rocks in the right foreground are slate and graywaches; the lighter colored rocks are granitic. Yentna district, Cook Inlet region, Alaska. 1911. Plate 6-A in U.S. Geological Survey. Bulletin 534. 1913. #1:/Alaska-Bulletin 534/csr00294 ID. Capps, S.R. 294 Rugged mountains at the head of Granite Creek. The dark colored rocks in the right foreground are slate and graywaches; the lighter colored rocks are granitic. Yentna district, Cook Inlet region, Alaska. 1911. Plate 6-A in U.S. Geological Survey. Bulletin 534. 1913. #1:/Alaska-Bulletin 534/csr00301 ID. Capps, S.R. 301 Moss hummocks on upper part of Dutch Creek Yentna district, Cook Inlet region, Alaska. 1911. Plate 7-B in U.S. Geological Survey. Bulletin 534. 1913. #1:/Alaska-Bulletin 534/csr00304 ID. Capps, S.R. 304 Glaciers at the head of Hidden Creek, west of Granite Creek The glacier at the right lies along the contact between the granitic rocks and the slates. Yentna district, Cook Inlet region, Alaska. 1911. Plate 6-B in U.S. Geological Survey. Bulletin 534. 1913. #1:/Alaska-Bulletin 534/csr00305 ID. Capps, S.R. 305 Glaciers at the head of Hidden Creek, west of Granite Creek The glacier at the right lies along the contact between the granitic rocks and the slates. Yentna district, Cook Inlet region, Alaska. 1911. Plate 6-B in U.S. Geological Survey. Bulletin 534. 1913. #1:/Alaska-Bulletin 534/csr00307 ID. Capps, S.R. 307 Glaciers at the head of Hidden Creek, west of Granite Creek The glacier at the right lies along the contact between the granitic rocks and the slates. Yentna district, Cook Inlet region, Alaska. 1911. Plate 6-B in U.S. Geological Survey. Bulletin 534. 1913. #1:/Alaska-Bulletin 534/csr00308 ID. Capps, S.R. 308 Kahiltna Glacier from the mountain north of the mouth of Granite Creek. The glacier is here more than 3 miles wide. Yentna district, Cook Inlet region, Alaska. 1911. Plate 10-B in U.S. Geological Survey. Bulletin 534. 1913. #1:/Alaska-Bulletin 534/csr00309 ID. Capps, S.R. 309 Kahiltna Glacier from the mountain north of the mouth of Granite Creek. The glacier is here more than 3 miles wide. Yentna district, Cook Inlet region, Alaska. 1911. Plate 10-B in U.S. Geological Survey. Bulletin 534. 1913. #1:/Alaska-Bulletin 534/csr00314 ID. Capps, S.R. 314 Sluicing with hydraulic giant on Cache Creek near the mouth of Rambler Gulch. Yentna district, Cook Inlet region, Alaska. 1911. Plate 12-B in U.S. Geological Survey. Bulletin 534. 1913. #1:/Alaska-Bulletin 534/csr00323 ID. Capps, S.R. 323 Tertiary gravels on the upper part of Treasure Creek. Yentna district, Cook Inlet region, Alaska. 1911. Plate 9-A in U.S. Geological Survey. Bulletin 534. 1913. #1:/Alaska-Bulletin 534/csr00328 ID. Capps, S.R. 328 Chelantna Lake and Alaska Range, looking northeast, Mount McKinley and Foraker in the distance, at the left. The lake lies in a glacially scoured valley behind a moraine dam, its lower end marking the boundary between the alpine belt and the uplands that surround the foothills. Yentna district, Cook Inlet region, Alaska. 1911. Plate 4-B in U.S. Geological Survey. Bulletin 534. 1913. #1:/Alaska-Bulletin 534/csr00329 ID. Capps, S.R. 329 Chelantna Lake and Alaska Range, looking northeast, Mount McKinley and Foraker in the distance, at the left. The lake lies in a glacially scoured valley behind a moraine dam, its lower end marking the boundary between the alpine belt and the uplands that surround the foothills. Yentna district, Cook Inlet region, Alaska. 1911. Plate 4-B in U.S. Geological Survey. Bulletin 534. 1913. #1:/Alaska-Bulletin 534/csr00330 ID. Capps, S.R. 330 Chelantna Lake and Alaska Range, looking northeast, Mount McKinley and Foraker in the distance, at the left. The lake lies in a glacially scoured valley behind a moraine dam, its lower end marking the boundary between the alpine belt and the uplands that surround the foothills. Yentna district, Cook Inlet region, Alaska. 1911. Plate 4-B in U.S. Geological Survey. Bulletin 534. 1913. #1:/Alaska-Bulletin 534/csr00341 ID. Capps, S.R. 341 Slate Creek, with Mount Kliskon in the distance. The creek heads between the hills of Tertiary gravel (in the foreground, at left and center) and the slates of Mount Kliskon (in the background, on the right) Yentna district, Cook Inlet region, Alaska. 1911. Plate 10- A in U.S. Geological Survey. Bulletin 534. 1913. #1:/Alaska-Bulletin 534/csr00342 ID. Capps, S.R. 342 Slate Creek, with Mount Kliskon in the distance. The creek heads between the hills of Tertiary gravel (in the foreground, at left and center) and the slates of Mount Kliskon (in the background, on the right) Yentna district, Cook Inlet region, Alaska. 1911. Plate 10- A in U.S. Geological Survey. Bulletin 534. 1913. #1:/Alaska-Bulletin 534/csr00343 ID. Capps, S.R. 343 Tertiary gravels at the head of Slate Creek. The hills in the distance at the right are of slate and greywacke, upon which the gravels lie unconformably. Yentna district, Cook Inlet region, Alaska. 1911. Plate 9-B in U.S. Geological Survey. Bulletin 534. 1913. #1:/Alaska-Bulletin 534/csr00345 ID. Capps, S.R. 345 Tertiary gravels on the southeast side of Cottonwood Creek near Fairview Mountain. Postglacial erosion has cut deep gulches in the gravels and formed the alluvial apron at their base, whereas the slate (in the foreground) shows little erosion. Yentna district, Cook Inlet region, Alaska. 1911. Plate 8-B in U.S. Geological Survey. Bulletin 534. 1913. #1:/Alaska-Bulletin 534/csr00346 ID. Capps, S.R. 346 The Eocene coal bearing series and overlying Tertiary gravels on the northwest side of Fairview Mountain. The immediate foreground is composed slate. The Eocene beds, containing lignitic coal are overlain by Tertiary gravels, which form the upper part of the mountain. Yentna district, Cook Inlet region, Alaska. 1911. Plate 8-A in U.S. Geological Survey. Bulletin 534. 1913. #1:/Alaska-Bulletin 607/csr00380 ID. Capps, S.R. 380 Steeply dipping slate and graywacke beds of Valdez group. Valdez district, Alaska Gulf region, Alaska. 1911. Plate 5-A in U.S. Geological Survey. Bulletin 605. 1915. #1:/Alaska-Bulletin 607/csr00382 ID. Capps, S.R. 382 Slates and graywackes of the Orca group conformably overlain by diabase flows. Valdez district, Alaska Gulf region, Alaska. 1911. Plate 5-B in U.S. Geological Survey. Bulletin 605. 1915. #1:/Alaska-Bulletin 607/csr00383 ID. Capps, S.R. 383 Ellipsoidal greenstone (on right) succeeded by conglomerates and shales which are themselves overlain by lava flows. Alaska Gulf region, Alaska. 1911. Plate 8-A in U.S. Geological Survey. Bulletin 605. 1915. #1:/Alaska-Bulletin 607/csr00385 ID. Capps, S.R. 385 Tilted and slightly folded slates and graywackes of Orca group on the southeast side of Bligh Island. . Valdez district, Alaska Gulf region, Alaska. 1911. Plate 9-A in U.S. Geological Survey. Bulletin 605. 1915. #1:/Alaska-Bulletin 607/csr00386 ID. Capps, S.R. 386 Copper Mountain from the north, looking across the head of Vesuvius valley. Valdez district, Alaska Gulf region, Alaska. 1911. Plate 3 in U.S. Geological Survey. Bulletin 605. 1915. #1:/Alaska-Bulletin 607/csr00387 ID. Capps, S.R. 387 Volcanic breccia on north side of Galena Bay near mouth. Valdez district, Alaska Gulf region, Alaska. 1911. Plate 8-B in U.S. Geological Survey. Bulletin 605. 1915. #1:/Alaska-Bulletin 607/csr00395 ID. Capps, S.R. 395 From the southeast of two tributaries of Fishhook Creek; Hatcher Creek (on the right) lies along the contact between the quartz diorite (on the right) and the mica schist (on the left). Matanuska district, Cook Inlet region, Alaska. 1913. Plate 5-B in U.S. Geological Survey. Bulletin 607. 1915. #1:/Alaska-Bulletin 607/csr00396 ID. Capps, S.R. 396 From the southeast of two tributaries of Fishhook Creek; Hatcher Creek (on the right) lies along the contact between the quartz diorite (on the right) and the mica schist (on the left). Matanuska district, Cook Inlet region, Alaska. 1913. Plate 5-B in U.S. Geological Survey. Bulletin 607. 1915. #1:/Alaska-Bulletin 607/csr00397 ID. Capps, S.R. 397 Head of Fishhook valley from the southeast. Matanuska district, Cook Inlet region, Alaska. 1913. Plate 5-B in U.S. Geological Survey. Bulletin 607. 1915. #1:/Alaska-Bulletin 607/csr00398 ID. Capps, S.R. 398 Head of Fishhook valley from the southeast. Matanuska district, Cook Inlet region, Alaska. 1913. Plate 5-B in U.S. Geological Survey. Bulletin 607. 1915. #1:/Alaska-Bulletin 607/csr00399 ID. Capps, S.R. 399 Head of Fishhook valley from the southeast. Matanuska district, Cook Inlet region, Alaska. 1913. Plate 5-B in U.S. Geological Survey. Bulletin 607. 1915. #1:/Alaska-Bulletin 607/csr00416 ID. Capps, S.R. 416 Valley heads cut in southward dipping Tertiary sediments. Cook Inlet region, Alaska. 1913. Plate 9-A in U.S. Geological Survey. Bulletin 607. 1915. #1:/Alaska-Bulletin 607/csr00418 ID. Capps, S.R. 418 Valley heads cut in southward dipping Tertiary sediments. Cook Inlet region, Alaska. 1913. Plate 9-A in U.S. Geological Survey. Bulletin 607. 1915. #1:/Alaska-Bulletin 607/csr00421 ID. Capps, S.R. 421 Head of Little Susitna valley. The great talus block in the foreground (about 40 feet long) and the mountains that border the valley are composed of quartz diorite. Matanuska district, Cook Inlet region, Alaska. 1913. Plate 5-A in U.S. Geological Survey. Bulletin 607. 1915. #1:/Alaska-Bulletin 607/csr00422 ID. Capps, S.R. 422 Head of Little Susitna valley. The great talus block in the foreground (about 40 feet long) and the mountains that border the valley are composed of quartz diorite. Matanuska district, Cook Inlet region, Alaska. 1913. Plate 5-A in U.S. Geological Survey. Bulletin 607. 1915. #1:/Alaska-Bulletin 607/csr00424 ID. Capps, S.R. 424 Peaks of altered and somewhat gneissic diorite on divide between Little Susitna River and Moose Creek. Wasilla district, Cook Inlet region, Alaska. 1913. Plate 11-B in U.S. Geological Survey. Bulletin 607. 1915. #1:/Alaska-Bulletin 607/csr00425 ID. Capps, S.R. 425 Block of gneissic diorite cut by veinlets of quartz. Wasilla district, Cook Inlet region, Alaska. 1913. Plate 12-A in U.S. Geological Survey. Bulletin 607. 1915. #1:/Alaska-Bulletin 607/csr00432 ID. Capps, S.R. 432 Bed of Reed Creek, boulders are quartz diorite. Matanuska district, Cook Inlet region, Alaska. 1913. Plate 11-A in U.S. Geological Survey. Bulletin 607. 1915. #1:/Alaska-Bulletin 607/csr00433 ID. Capps, S.R. 433 Glacial lateral moraines across the mouth of Sidney Creek valley. Matanuska district, Cook Inlet region, Alaska. 1913. Plate 8-B in U.S. Geological Survey. Bulletin 607. 1915. #1:/Alaska-Bulletin 607/csr00435 ID. Capps, S.R. 435 Part of the southwest valley wall of Archangel Creek, showing typical rugged topography of the quartz diorite mountains. Matanuska district, Cook Inlet region, Alaska. 1913. Plate 4-A in U.S. Geological Survey. Bulletin 607. 1915. #1:/Alaska-Bulletin 607/csr00440 ID. Capps, S.R. 440 Mill of Alaska Quartz Mining Co. on Fishhook Creek. Matanuska district, Cook Inlet region, Alaska. 1913. Plate 14-B in U.S. Geological Survey. Bulletin 607. 1915. #1:/Alaska-Bulletin 607/csr00442 ID. Capps, S.R. 442 Skyscraper Mountain from the north, a conspicuous set of westward-dipping joints may be seen. The Skyscraper vein of the Alaska Free Gold Mining Co. lies along of the joints. The tunnel mouth may be faintly seen below and to the left of the Peak. Hope district, Cook Inlet region, Alaska. 1913. Plate 13-A in U.S. Geological Survey. Bulletin 607. 1915 #1:/Alaska-Bulletin 607/csr00443 ID. Capps, S.R. 443 Northeast valley wall of upper Fishhook creek. The view shows three tributary hanging valley. The top of on stamp mill may be seen in the lower right corner and another camp and mill appear just above it. Matanuska district, Cook Inlet region, Alaska. 1913. Plate 10-A in U.S. Geological Survey. Bulletin 607. 1915. #1:/Alaska-Bulletin 607/csr00444 ID. Capps, S.R. 444 Northeast valley wall of upper Fishhook creek. The view shows three tributary hanging valley. The top of on stamp mill may be seen in the lower right corner and another camp and mill appear just above it. Matanuska district, Cook Inlet region, Alaska. 1913. Plate 10-A in U.S. Geological Survey. Bulletin 607. 1915. #1:/Alaska-Bulletin 607/csr00445 ID. Capps, S.R. 445 Northeast valley wall of upper Fishhook creek. The view shows three tributary hanging valley. The top of on stamp mill may be seen in the lower right corner and another camp and mill appear just above it. Matanuska district, Cook Inlet region, Alaska. 1913. Plate 10-A in U.S. Geological Survey. Bulletin 607. 1915. #1:/Alaska-Bulletin 607/csr00446 ID. Capps, S.R. 446 Granite Mountain, with the mill and workings of the Alaska Gold Quartz Mining Co. Tustmenta district, Cook Inlet region, Alaska. 1913. Plate 14-A in U.S. Geological Survey. Bulletin 607. 1915. #1:/Alaska-Bulletin 607/csr00449 ID. Capps, S.R. 449 Tunnel of Alaska Gold Quartz Mining Co. on Granite Mountain, shows two prominent sets of joints in quartz diorite. The veins lie along joints of the set, which dips to the left. Tustmenta district, Cook Inlet region, Alaska. 1913. Plate 14-A in U.S. Geological Survey. Bulletin 607. 1915. #1:/Alaska-Bulletin 607/csr00459 ID. Capps, S.R. 459 Mill and camp of Gold Bullion Mining Co., the veins out crop near the top of the mountains in the background. The impounded tailings may be seen below the mill. Matanuska district, Cook Inlet region, Alaska. 1913. Plate 15 in U.S. Geological Survey. Bulletin 607. 1915. #1:/Alaska-Bulletin 607/csr00464 ID. Capps, S.R. 464 Characteristic weather surface of a block of mica schist. Matanuska district, Cook Inlet region, Alaska. 1913. Plate 8-A in U.S. Geological Survey. Bulletin 607. 1915. #1:/Alaska-Bulletin 607/csr00465 ID. Capps, S.R. 465 Eastern part of Bald Mountain ridge, a characteristic mountain crest carved from mica schist. Matanuska district, Cook Inlet region, Alaska. 1913. Plate 4-B in U.S. Geological Survey. Bulletin 607. 1915. #1:/Alaska-Bulletin 607/csr00468 ID. Capps, S.R. 468 Western part of Bald Mountain ridge. The rounded crest of the ridge (left center) is part of the pre-glacial surface developed by stream erosion. The steep gulch heads are glacial cirques cut into the old upland surface. Matanuska district, Cook Inlet region, Alaska. 1913. Plate 9-B in U.S. Geological Survey. Bulletin 607. 1915. #1:/Alaska-Bulletin 607/csr00469 ID. Capps, S.R. 469 Western part of Bald Mountain ridge. The rounded crest of the ridge (left center) is part of the pre-glacial surface developed by stream erosion. The steep gulch heads are glacial cirques cut into the old upland surface. Matanuska district, Cook Inlet region, Alaska. 1913. Plate 9-B in U.S. Geological Survey. Bulletin 607. 1915. #1:/Alaska-Bulletin 607/csr00473 ID. Capps, S.R. 473 Moss and heather hummocks on top of Bald Mountain ridge. Matanuska district, Cook Inlet region, Alaska. 1913. Plate 7-B in U.S. Geological Survey. Bulletin 607. 1915. #1:/Alaska-Bulletin 607/csr00477 ID. Capps, S.R. 477 Moss and heather ridges on top of Bald Mountain ridge. Matanuska district, Cook Inlet region, Alaska. 1913. Plate 7-A in U.S. Geological Survey. Bulletin 607. 1915. #1:/Alaska-Bulletin 607/csr00500 ID. Capps, S.R. 500 Interbedded arkose and shale beds at head of Delia Creek. Matanuska district, Cook Inlet region, Alaska. 1913. Plate 6-B in U.S. Geological Survey. Bulletin 607. 1915. #1:/Alaska-Bulletin 607/csr00502 ID. Capps, S.R. 502 Luxuriant growth of red-top grass near the canyon of Little Susitna River, man provides scale. Matanuska district, Cook Inlet region, Alaska. 1913. Plate 6-B in U.S. Geological Survey. Bulletin 607. 1915 #1:/Alaska Glacier/csr00513 ID. Capps, S.R. 513 Concretionary sandstone (Kennicott?) up creek west of camp. Alaska Copper River region, Alaska. June 16, cc 1913. #1:/Alaska Glacier/csr00514 ID. Capps, S.R. 514 Panorama of Nizina Glacier from above camp. Alaska Copper River region, Alaska. June 16, cc 1913. #1:/Alaska Glacier/csr00515 ID. Capps, S.R. 515 Panorama of Nizina Glacier from above camp. Alaska Copper River region, Alaska. June 16, cc 1913. #1:/Alaska Glacier/csr00516 ID. Capps, S.R. 516 Panorama of Nizina Glacier from above camp. Alaska Copper River region, Alaska. June 16, cc 1913. #1:/Alaska Glacier/csr00517 ID. Capps, S.R. 517 Tertiary lavas above Carboniferous beds. South side of lower Skolai Creek. Alaska Copper River region, Alaska. June 19, cc 1913. #1:/Alaska Glacier/csr00518 ID. Capps, S.R. 518 Panorama of Nizina Glacier from point north of camp B, 6000 feet. Alaska Copper River region, Alaska. June 19, cc 1913. #1:/Alaska Glacier/csr00519 ID. Capps, S.R. 519 Panorama of Nizina Glacier from point north of camp B, 6000 feet. Alaska Copper River region, Alaska. June 19, cc 1913. #1:/Alaska Glacier/csr00520 ID. Capps, S.R. 520 Panorama of Nizina Glacier from point north of camp B, 6000 feet. Alaska Copper River region, Alaska. June 19, cc 1913. #1:/Alaska-Bulletin 630/csr00523 ID. Capps, S.R. 523 Panorama of Nizina Glacier from the east, showing bedded younger volcanic rocks. Chisana district, Yukon region, Alaska. 1914. Plate 4-A U.S. Geological Survey. Bulletin 630. 1916. #1:/Alaska-Bulletin 630/csr00524 ID. Capps, S.R. 524 Panorama of Nizina Glacier from the east, showing bedded younger volcanic rocks. Chisana district, Yukon region, Alaska. 1914. Plate 4-A U.S. Geological Survey. Bulletin 630. 1916. #1:/Alaska-Bulletin 630/csr00525 ID. Capps, S.R. 525 Panorama of Nizina Glacier from the east, showing bedded younger volcanic rocks. Chisana district, Yukon region, Alaska. 1914. Plate 4-A U.S. Geological Survey. Bulletin 630. 1916. #1:/Alaska Glacier/csr00529 ID. Capps, S.R. 529 Panorama of Russell Glacier and south side of upper Skolai Creek valley. Alaska Copper River region, Alaska. cc 1914. #1:/Alaska Glacier/csr00530 ID. Capps, S.R. 530 Panorama of Russell Glacier and south side of upper Skolai Creek valley. Alaska Copper River region, Alaska. cc 1914. #1:/Alaska Glacier/csr00531 ID. Capps, S.R. 531 Panorama of Russell Glacier and south side of upper Skolai Creek valley. Alaska Copper River region, Alaska. cc 1914. #1:/Alaska Glacier/csr00532 ID. Capps, S.R. 532 Panorama of Russell Glacier and south side of upper Skolai Creek valley. Alaska Copper River region, Alaska. cc 1914. #1:/Alaska Glacier/csr00537 ID. Capps, S.R. 537 Russell Glacier and Castle Mountain. Alaska Copper River region, Alaska. cc 1914. #1:/Alaska Glacier/csr00538 ID. Capps, S.R. 538 Crossing Russell Glacier with pack mules. Alaska Copper River region, Alaska. cc 1914. #1:/Alaska Glacier/csr00543 ID. Capps, S.R. 543 Looking south toward Russell Glacier. Alaska Copper River region, Alaska. cc 1914. #1:/Alaska Glacier/csr00544 ID. Capps, S.R. 544 Sheep Creek Glacier. Alaska Copper River region, Alaska. cc 1914. #1:/Alaska-Bulletin 630/csr00547 ID. Capps, S.R. 547 Close view of overturned block of peat with included spruce stumps. Chitina district, Copper River region, Alaska. 1914. Plate 14-B in U.S. Geological Survey. Bulletin 630. 1616 #1:/Alaska-Bulletin 630/csr0547a ID. Capps, S.R. 547a Section of White River bluff, showing glacial till overlain by peat and volcanic ash. Chitina district, Copper River region, Alaska. 1914. Plate 15 in U.S. Geological Survey. Bulletin 630. 1616 #1:/Alaska Glacier/csr00554 ID. Capps, S.R. 554 Mt. Natazhat, from upper Kletsan Creek basin. Alaska Copper River region, Alaska. cc 1914. #1:/Alaska Glacier/csr00555 ID. Capps, S.R. 555 Panorama of Mt. Natazhat, from point opposite mouth of Kletsan Creek. Alaska Upper Yukon, Tanana, Alaska. cc 1914. #1:/Alaska Glacier/csr00556 ID. Capps, S.R. 556 Panorama of Mt. Natazhat, from point opposite mouth of Kletsan Creek. Alaska Upper Yukon, Tanana, Alaska. cc 1914. #1:/Alaska Glacier/csr00557 ID. Capps, S.R. 557 Panorama of Mt. Natazhat, from point opposite mouth of Kletsan Creek. Alaska Upper Yukon, Tanana, Alaska. cc 1914. #1:/Alaska-Bulletin 630/csr00593 ID. Capps, S.R. 593 Highly inclined Mesozoic slates cut by dikes and sills on upper Chathenda Creek. Chisana district, Yukon region, Alaska. 1914. Plate 8-B in U.S. Geological Survey. Bulletin 630. 1916 #1:/Alaska-Bulletin 630/csr00597 ID. Capps, S.R. 597 The glacial valley of Chathenda Creek and the town of Bonanza, lower Bonanza Canyon in foreground. Chisana district, Yukon region, Alaska. 1914. Plate 6-B in U.S. Geological Survey. Bulletin 630. 1916. #1:/Alaska-Bulletin 630/csr00601 ID. Capps, S.R. 601 Canyon of Bonanza Creek between claims no. 3a and no. 7, the present canyon has been intrenched in a broader glacial valley. Chisana district, Yukon region, Alaska. 1914. Plate 19-B in U.S. Geological Survey. Bulletin 630. 1916 #1:/Alaska-Bulletin 630/csr00607 ID. Capps, S.R. 607 Canyon of Bonanza creek at claim no. 3a. Chisana district, Yukon region, Alaska. 1914. Plate 19-A in U.S. Geological Survey. Bulletin 630. 1916. #1:/Alaska-Bulletin 630/csr00616 ID. Capps, S.R. 616 Vertically dipping Mesozoic shales and graywackes cut by dike on upper Bonanza Creek. Cook Inlet region, Alaska. 1914. Plate 6-A U.S. Geological Survey. Bulletin 630. 1916. #1:/Alaska-Bulletin 630/csr00657 ID. Capps, S.R. 657 Massive Tertiary conglomerate on Chatenda Creek, below the mouth of Dry gulch Chisana district, Yukon region, Alaska. 1914. Plate 8-A in U.S. Geological Survey. Bulletin 630. 1916. #1:/Alaska-Bulletin 630/csr00670 ID. Capps, S.R. 670 Steeply tilted beds of tillite and outwash gravels in upper White River basin. Chisana district, Yukon region, Alaska. 1914. Plate 11-B in U.S. Geological Survey. Bulletin 630. 1916. #1:/Alaska-Bulletin 630/csr00671 ID. Capps, S.R. 671 Close view of tillite beds. Cook Inlet region, Alaska. 1914. Plate 11-A in U.S. Geological Survey. Bulletin 630. 1916 #1:/Alaska Glacier/csr00672 ID. Capps, S.R. 672 Lower end of Russell Glacier. Copper River region, Alaska. 1914. #1:/Alaska Glacier/csr00673 ID. Capps, S.R. 673 Lower end of Russell Glacier. Copper River region, Alaska. 1914. #1:/Alaska Glacier/csr00675 ID. Capps, S.R. 675 Temporary town of Anchorage. Panorama with Photo Nos. csr00676 and csr00677. Anchorage district, Cook Inlet region, Alaska. 1915 #1:/Alaska Glacier/csr00676 ID. Capps, S.R. 676 Temporary town of Anchorage. Panorama with Photo Nos. csr00675 and csr00677. Anchorage district, Cook Inlet region, Alaska. 1915 #1:/Alaska Glacier/csr00687 ID. Capps, S.R. 687 Mountains and valley of upper Peters Creek. Anchorage district, Cook Inlet region, Alaska. 1915 #1:/Alaska Glacier/csr00688 ID. Capps, S.R. 688 Glacier at southeast head of Peters Creek. Panorama with Photo Nos. csr00689, csr00690, and csr00691. Anchorage district, Cook Inlet region, Alaska. 1915 #1:/Alaska Glacier/csr00689 ID. Capps, S.R. 689 Glacier at southeast head of Peters Creek. Panorama with Photo Nos. csr00688, csr00690, and csr00691. Anchorage district, Cook Inlet region, Alaska. 1915 #1:/Alaska Glacier/csr00690 ID. Capps, S.R. 690 Glacier at southeast head of Peters Creek. Panorama with Photo Nos. csr00688, csr00689, and csr00691. Anchorage district, Cook Inlet region, Alaska. 1915 #1:/Alaska Glacier/csr00691 ID. Capps, S.R. 691 Glacier at southeast head of Peters Creek. Panorama with Photo Nos. csr00688, csr00689, and csr00690. Anchorage district, Cook Inlet region, Alaska. 1915 #1:/Alaska Glacier/csr00692 ID. Capps, S.R. 692 Glacier at southeast head of Peters Creek. Anchorage district, Cook Inlet region, Alaska. 1915 #1:/Alaska Glacier/csr00697 ID. Capps, S.R. 697 Glacier on south fork of Eklunta Creek. Anchorage district, Cook Inlet region, Alaska. 1915 #1:/Alaska Glacier/csr00698 ID. Capps, S.R. 698 Near view of glacier on south fork of Eklunta Creek. Anchorage district, Cook Inlet region, Alaska. 1915 #1:/Alaska Glacier/csr00724 ID. Capps, S.R. 724 Raven Creek Glacier showing crevasses. Panorama with Photo No. csr00725. Anchorage district, Cook Inlet region, Alaska. 1915 #1:/Alaska Glacier/csr00725 ID. Capps, S.R. 725 Raven Creek Glacier showing crevasses. Panorama with Photo No. csr00724. Anchorage district, Cook Inlet region, Alaska. 1915 #1:/Alaska Glacier/csr00727 ID. Capps, S.R. 727 Contorted slate-graywacke and Raven Creek Glacier showing. Anchorage district, Cook Inlet region, Alaska. 1915 #1:/Alaska Glacier/csr00728 ID. Capps, S.R. 728 View up Raven Creek Valley. Anchorage district, Cook Inlet region, Alaska. 1915 #1:/Alaska Glacier/csr00729 ID. Capps, S.R. 729 Eagle River Glacier. Panorama with Photo Nos. csr00730 and csr00731. Anchorage district, Cook Inlet region, Alaska. 1915 #1:/Alaska Glacier/csr00730 ID. Capps, S.R. 730 Eagle River Glacier. Panorama with Photo Nos. csr00729 and csr00731. Anchorage district, Cook Inlet region, Alaska. 1915 #1:/Alaska Glacier/csr00731 ID. Capps, S.R. 731 Eagle River Glacier. Panorama with Photo Nos. csr00729 and csr00730. Anchorage district, Cook Inlet region, Alaska. 1915 #1:/Alaska Glacier/csr00732 ID. Capps, S.R. 732 View up Eagle River Glacier. Anchorage district, Cook Inlet region, Alaska. 1915 #1:/Alaska-Bulletin 687/csr00761 ID. Capps, S.R. 761 Beds of lignite on Savage River. Healy district, Yukon region, Alaska. C. 1915. Plate 14- A in U.S. Geological Survey. Bulletin 687. 1919. #1:/Alaska-Bulletin 687/csr00765 ID. Capps, S.R. 765 Basal beds of the Tertiary coal-bearing formation on Sanctuary River. Healy district, Yukon region, Alaska. C. 1915. Plate 14-B in U.S. Geological Survey. Bulletin 687. 1919. #1:/Alaska-Bulletin 687/csr00768 ID. Capps, S.R. 768 Southward-dipping rocks of Cantwell formation in upper Teklanika Basin. Fairbanks district, Yukon region, Alaska. C. 1915. Plate 12-B in U.S. Geological Survey. Bulletin 687. 1919. #1:/Alaska-Bulletin 687/csr00786 ID. Capps, S.R. 786 Steeply tilted shales and grits of Cantwell formation in the basin of East Fork of Toklat River. Kantishna district, Yukon region, Alaska. C. 1915. Plate 12-A in U.S. Geological Survey. Bulletin 687. 1919. #1:/Denali National Park and Preserve/csr00822 ID. Capps, S.R. 822 Denali National Park and Preserve, Alaska. Mount McKinley, viewed from the east edge of Muldrow Glacier. Circa 1919. #1:/Denali National Park and Preserve/csr00823 ID. Capps, S.R. 823 Denali National Park and Preserve, Alaska. Mount McKinley, viewed from the east edge of Muldrow Glacier. Circa 1919. #1:/Denali National Park and Preserve/csr00826 ID. Capps, S.R. 826 Denali National Park and Preserve, Alaska. Mount McKinley, viewed from upper Moose Creek. Circa 1919. #1:/Alaska-Bulletin 687/csr00831 ID. Capps, S.R. 831 Soil flows in basin of Moose Creek. Fairbanks district, Yukon region, Alaska. C. 1915. Plate 15-A in U.S. Geological Survey. Bulletin 687. 1919. #1:/Alaska-Bulletin 687/csr00836 ID. Capps, S.R. 836 Sands, clays and gravels of the Tertiary coal-bearing formation on Clearwater Fork of Toklat River. Kantishna district, Yukon region, Alaska. C. 1915. Plate 15-B in U.S. Geological Survey. Bulletin 687. 1919. #1:/Alaska Glacier/csr00917 ID. Capps, S.R. 917 Looking north to main Teklanika Glacier. Yukon region, Alaska. 1915. #1:/Alaska Glacier/csr00918 ID. Capps, S.R. 918 Looking east across main Teklanika Glacier. Yukon region, Alaska. 1915. #1:/Alaska Glacier/csr00919 ID. Capps, S.R. 919 Upper Teklanika Glacier. Yukon region, Alaska. 1915. #1:/Alaska Glacier/csr00920 ID. Capps, S.R. 920 Upper Teklanika Glacier. Yukon region, Alaska. 1915. #1:/Alaska Glacier/csr00921 ID. Capps, S.R. 921 Panorama of south and west sides of Teklanika Glacier at head of southeast fork of Teklanika River. Yukon region, Alaska. 1915. #1:/Alaska Glacier/csr00922 ID. Capps, S.R. 922 Panorama of south and west sides of Teklanika Glacier at head of southeast fork of Teklanika River. Yukon region, Alaska. 1915. #1:/Alaska Glacier/csr00923 ID. Capps, S.R. 923 Panorama of south and west sides of Teklanika Glacier at head of southeast fork of Teklanika River. Yukon region, Alaska. 1915. #1:/Alaska Glacier/csr00924 ID. Capps, S.R. 924 Panorama of south and west sides of Teklanika Glacier at head of southeast fork of Teklanika River. Yukon region, Alaska. 1915. #1:/Alaska Glacier/csr00925 ID. Capps, S.R. 925 Part of head of Teklanika Glacier at southeast fork of Teklanika River. Yukon region, Alaska. 1915. #1:/Alaska Glacier/csr00926 ID. Capps, S.R. 926 Looking southwest to western Teklanika Glacier at head of west fork of Teklanika River. Yukon region, Alaska. 1915. #1:/Alaska Glacier/csr01047 ID. Capps, S.R. 1047 Recessional moraine on Newcomer Creek. Denali National Park and Preserve, Alaska. 1925. #1:/Alaska Glacier/csr01048 ID. Capps, S.R. 1048 Looking south across Muldrow Glacier from pass at head of Newcomer Creek. Panorama with Photo Nos. csr01049, csr01050, csr01051, and csr01052. Denali National Park and Preserve, Alaska. 1925. #1:/Alaska Glacier/csr01049 ID. Capps, S.R. 1049 Looking south across Muldrow Glacier from pass at head of Newcomer Creek. Panorama with Photo Nos. csr01048, csr01050, csr01051, and csr01052. Denali National Park and Preserve, Alaska. 1925. #1:/Alaska Glacier/csr01050 ID. Capps, S.R. 1050 Looking south across Muldrow Glacier from pass at head of Newcomer Creek. Panorama with Photo Nos. csr01048, csr01049, csr01051, and csr01052. Denali National Park and Preserve, Alaska. 1925. #1:/Alaska Glacier/csr01051 ID. Capps, S.R. 1051 Looking south across Muldrow Glacier from pass at head of Newcomer Creek. Panorama with Photo Nos. csr01048, csr01049, csr01050, and csr01052. Denali National Park and Preserve, Alaska. 1925. #1:/Alaska Glacier/csr01052 ID. Capps, S.R. 1052 Looking south across Muldrow Glacier from pass at head of Newcomer Creek. Panorama with Photo Nos. csr01048, csr01049, csr01050, and csr01051. Denali National Park and Preserve, Alaska. 1925. #1:/Denali National Park and Preserve/csr01054 ID. Capps, S.R. 1054 Denali National Park and Preserve, Alaska. Upper Muldrow Glacier. Circa 1925. Photos csr01054 and csr01055 form a panorama. #1:/Denali National Park and Preserve/csr01055 ID. Capps, S.R. 1055 Denali National Park and Preserve, Alaska. Upper Muldrow Glacier. Circa 1925. Photos csr01054 and csr01055 form a panorama. #1:/Denali National Park and Preserve/csr01056 ID. Capps, S.R. 1056 Denali National Park and Preserve, Alaska. Muldrow Glacier, viewed from Newcomer Greek Pass. Circa 1925. Photos csr01056, csr01057, csr01058, and csr01059 form a panorama. #1:/Denali National Park and Preserve/csr01057 ID. Capps, S.R. 1057 Denali National Park and Preserve, Alaska. Muldrow Glacier, viewed from Newcomer Greek Pass. Circa 1925. Photos csr01056, csr01057, csr01058, and csr01059 form a panorama. #1:/Denali National Park and Preserve/csr01058 ID. Capps, S.R. 1058 Denali National Park and Preserve, Alaska. Muldrow Glacier, viewed from Newcomer Greek Pass. Circa 1925. Photos csr01056, csr01057, csr01058, and csr01059 form a panorama. #1:/Denali National Park and Preserve/csr01059 ID. Capps, S.R. 1059 Denali National Park and Preserve, Alaska. Muldrow Glacier, viewed from Newcomer Greek Pass. Circa 1925. Photos csr01056, csr01057, csr01058, and csr01059 form a panorama. #1:/Denali National Park and Preserve/csr01071 ID. Capps, S.R. 1071 Denali National Park and Preserve, Alaska. Mount McKinley and adjacent Peaks, viewed from forks of Caribou Creek. Circa 1919. Photos csr01071 and csr01072 form a panorama. #1:/Denali National Park and Preserve/csr01072 ID. Capps, S.R. 1072 Denali National Park and Preserve, Alaska. Mount McKinley and adjacent Peaks, viewed from forks of Caribou Creek. Circa 1919. Photos csr01071 and csr01072 form a panorama. #1:/Denali National Park and Preserve/csr01086 ID. Capps, S.R. 1086 Denali National Park and Preserve, Alaska. Looking southeastward up Hanna Glacier. Circa 1919. Photos csr01086 and csr01087 form a panorama. #1:/Denali National Park and Preserve/csr01087 ID. Capps, S.R. 1087 Denali National Park and Preserve, Alaska. Looking southeastward up Hanna Glacier. Circa 1919. Photos csr01086 and csr01087 form a panorama. #1:/Denali National Park and Preserve/csr01113 ID. Capps, S.R. 1113 Diorite peaks, upper Cathedral Creek. Denali National Park and Preserve, Alaska. cc 1919. Exact location is 62 degrees 50 minutes and 15 seconds north latitude, 152 degrees 22 minutes and 45 seconds west longitude. #1:/Denali National Park and Preserve/csr01114 ID. Capps, S.R. 1114 Upper Cathedral Creek. Denali National Park and Preserve, Alaska. cc 1919. Exact location is 62 degrees 50 minutes and 15 seconds north latitude, 152 degrees 22 minutes and 45 seconds west longitude. #1:/Denali National Park and Preserve/csr01115 ID. Capps, S.R. 1115 View up Cathedral Creek. Denali National Park and Preserve, Alaska. cc 1919. Exact location is 62 degrees 50 minutes and 15 seconds north latitude, 152 degrees 22 minutes and 45 seconds west longitude. #1:/Denali National Park and Preserve/csr01116 ID. Capps, S.R. 1116 View down Tonzona from creek 1 mile south of Camp. Denali National Park and Preserve, Alaska. August 7, cc 1919. #1:/Denali National Park and Preserve/csr01117 ID. Capps, S.R. 1117 Surprise Glacier. Tonzona Basin. Denali National Park and Preserve, Alaska. cc 1919. Exact location is 62 degrees 41 minutes north latitude, 152 degrees 24 minutes west longitude. #1:/Denali National Park and Preserve/csr01118 ID. Capps, S.R. 1118 Tonzona Valley above Surprise Glacier. Denali National Park and Preserve, Alaska. cc 1919. Exact location is 62 degrees 41 minutes north latitude, 152 degrees 24 minutes west longitude. #1:/Alaska Glacier/csr01127 ID. Capps, S.R. 1127 William T. Mulkey, Jack Rimmer, and Jack Lean. Denali National Park and Preserve, Alaska. cc 1919. #1:/Alaska Glacier/csr01169 ID. Capps, S.R. 1169 Upper part of northern most Twin Glaciers. Alaska. cc 1925. #1:/Alaska Glacier/csr01170 ID. Capps, S.R. 1170 Upper part of northern most Twin Glaciers. Alaska. cc 1925. #1:/Alaska Glacier/csr01178 ID. Capps, S.R. 1178 Twin Glaciers. Panorama with csr01179. Alaska. cc 1925. #1:/Alaska Glacier/csr01179 ID. Capps, S.R. 1179 Twin Glaciers. Panorama with csr01178. Alaska. cc 1925. #1:/Alaska Glacier/csr01209 ID. Capps, S.R. 1209 Native [Indian] children at Susitna Station. Alaska. cc 1925. #1:/Alaska Glacier/csr01384 ID. Capps, S.R. 1384 Looking southwest from Trading Bay. Alaska. cc 1925. #1:/Alaska Glacier/csr01385 ID. Capps, S.R. 1385 Left to right: S.R. Capps, G. Fitz Gerald, William A. Spurr, Jim Brown, R.A. Francis and C.C. Tousley. Alaska. cc 1925. #1:/Alaska Glacier/csr01441 ID. Capps, S.R. 1441 Natives [Indians] at fishing villiage at foot of Sixmile Lake. Kenai Peninsula, Alaska. cc 1925. #1:/Alaska Glacier/csr01442 ID. Capps, S.R. 1442 Seversons Trading Post, Iliamna Lake. Kenai Peninsula, Alaska. cc 1925. #1:/Alaska Glacier/csr01486 ID. Capps, S.R. 1486 Vertical limestone. West Fork of Cantwell. Kenai Peninsula, Alaska. cc 1925. #1:/Alaska Glacier/csr01487 ID. Capps, S.R. 1487 Ice cascade, on glacier at head of West Fork of Cantwell. Kenai Peninsula, Alaska. cc 1925. #1:/Alaska Glacier/csr01488 ID. Capps, S.R. 1488 Looking down West fork of Cantwell from glacier. Kenai Peninsula, Alaska. cc 1925. #1:/Alaska Glacier/csr01489 ID. Capps, S.R. 1489 Vertical limestone, west fork of Cantwell. Kenai Peninsula, Alaska. cc 1925. #1:/Alaska Glacier/csr01492 ID. Capps, S.R. 1492 Super glacial stream, west fork of Cantwell Glacier. Kenai Peninsula, Alaska. cc 1925. #1:/Alaska Glacier/csr01493 ID. Capps, S.R. 1493 Looking up west fork of Cantwell. Kenai Peninsula, Alaska. cc 1925. #1:/Alaska Glacier/csr01494 ID. Capps, S.R. 1494 Looking south, down the east head of Cantwell. Kenai Peninsula, Alaska. cc 1925. #1:/Alaska Glacier/csr01495 ID. Capps, S.R. 1495 Limestone at head of east fork of Cantwell. Kenai Peninsula, Alaska. cc 1925. #1:/Alaska Glacier/csr01516 ID. Capps, S.R. 1516 Middleton Island, looking southeast. Kenai Peninsula, Alaska. cc 1927. #1:/Alaska Glacier/csr01517 ID. Capps, S.R. 1517 Middleton Island, looking southeast. Alaska. cc 1927. #1:/Capps S.R. Collection-Hallenbeck Mine/csr01971 ID. Capps, S.R. 1971 Hallenbeck placer mining operation. Lake County, Colorado. 1940. #1:/Black R.F. Collection/brf00034 ID. Capps, S.R. 34 Native [Eskimos] house of boards at Barrow. Barrow district, Northern Alaska region, Alaska. September 18, 1945. #1:/Black R.F. Collection/brf00035 ID. Capps, S.R. 35 Native [Eskimos] house of turf at Barrow. Barrow district, Northern Alaska region, Alaska. September 18, 1945. #1:/Black R.F. Collection/brf00040 ID. Capps, S.R. 40 Native [Eskimos] children at Barrow. Barrow district, Northern Alaska region, Alaska. September 18, 1945. #1:/Black R.F. Collection/brf00041 ID. Capps, S.R. 41 Native [Eskimos] children at Barrow. Barrow district, Northern Alaska region, Alaska. September 18, 1945. #1:/Black R.F. Collection/brf00042 ID. Capps, S.R. 42 Native [Eskimos] women. These include both full blooded and part Eskimos at Barrow. Barrow district, Northern Alaska region, Alaska. September 18, 1945. #1:/Alaska-Bulletin 525/plm00044 ID. Prindle, L.M. 44 Typical view of Yukon-Tanana upland. Yukon region, Alaska. C. 1905. Plate 4-A in U.S. Geological Survey. Bulletin 525. 1913. #1:/Alasks-Professional paper 45/plm00048 ID. Prindle, L.M. 48 Valley of the Fortymile River near the boundary, with Canada, Alaska. 1902, plate 17-B in U.S. Geological Survey. Professional paper 45. 1906. #1:/Alaska-Bulletin 251/plm00049 ID. Prindle, L.M. 49 Canyon of Fortymile, 500 feet below the level of the old valley. Fortymile district, Yukon region, Alaska. 1903. Plate 3-A in U.S. Geological Survey. Bulletin 251. 1905; Plate 2-B in U.S. Geological Survey. Bulletin 375. 1909. #1:/Alaska-Bulletin 251/plm00050 ID. Prindle, L.M. 50 Steele Creek, with Fortymile Creek in the foreground, Fortymile district, Yukon region, Alaska. 1903. Plate 2-A in U.S. Geological Survey. Bulletin 251. 1905 #1:/Alaska-Bulletin 251/plm00061 ID. Prindle, L.M. 61 Washing the overburden from the gold-bearing gravels, Wade Creek; D.C. Hefley's claim. Fortymile district, Yukon region, Alaska. 1903. Plate 8-A in U.S. Geological Survey. Bulletin 251. 1905. #1:/Alaska-Bulletin 251/plm00063 ID. Prindle, L.M. 63 Up Wade creek; Fortymile district, Yukon region, Alaska 1903Plate 6-B in U.S. Geological Survey. Bulletin 251. 1905, Plate 1-B in U.S. Geological Survey. Bulletin 375. 1909. #1:/Alaska-Bulletin 251/plm00065 ID. Prindle, L.M. 65 Schists with thin granitic sill on trail from Wade Creek to Walker Fork. Fortymile district, Yukon region, Alaska. 1903 Plate 6-A in U.S. Geological Survey. Bulletin 251. 1905, Plate 3-A in U.S. Geological Survey. Bulletin 375. 1909. #1:/Alaska-Bulletin 251/plm00067 ID. Prindle, L.M. 67 Steam scraper with bucket conveyor at mouth of Poker Creek. Fortymile district, Yukon region, Alaska. 1903. Plate 8-B in U.S. Geological Survey. Bulletin 251. 1905 #1:/Alaska-Bulletin 251/plm00100 ID. Prindle, L.M. 100 Shaft and horse hoist on Chicken Creek. Fortymile district, Yukon region, Alaska. 1903. Plate 9-A in U.S. Geological Survey. Bulletin 251. 1905. #1:/Alaska-Bulletin 251/plm00108 ID. Prindle, L.M. 108 Contorted schist on ridge north of Mosquito Fork. Fortymile district, Yukon region, Alaska. 1903. Plate 5-B in U.S. Geological Survey. Bulletin 251. 1905. Plate 3-B in U.S. Geological Survey. Bulletin 375. 1909. #1:/Alaska-Bulletin 251/plm00117 ID. Prindle, L.M. 117 Bed of the North Fork (of the Fortymile) by artificial cut-off. Fortymile district, Yukon region, Alaska. 1903. Plate 10-B in U.S. Geological Survey. Bulletin 251. 1905. #1:/Alaska-Bulletin 251/plm00119 ID. Prindle, L.M. 119 Artificial cut-off in schist on North Fork of the Fortymile. Fortymile district, Yukon region, Alaska. 1903. Plate 10-A in U.S. Geological Survey. Bulletin 251. 1905. Plate 6-B in U.S. Geological Survey. Bulletin 538. 1913. #1:/Alaska-Bulletin 251/plm00129 ID. Prindle, L.M. 129 Up American Creek. Eagle district, Yukon region, Alaska. 1903. Plate 12-A in U.S. Geological Survey. Bulletin 251. 1905, Plate 1-A in U.S. Geological Survey. Bulletin 375. 1909. #1:/Alaska-Bulletin 251/plm00130 ID. Prindle, L.M. 130 Hydraulic Plant of Doctor's Green on American Creek. Eagle district, Yukon region, Alaska. 1903. Plate 11 in U.S. Geological Survey. Bulletin 251. 1905. #1:/Alaska-Bulletin 251/plm00143 ID. Prindle, L.M. 143 Bridge for conveying water in a canvas hose across Seventymile. Eagle district, Yukon region, Alaska. 1903. Plate 12-B in U.S. Geological Survey. Bulletin 251. 1905 #1:/Alaska-Bulletin 251/plm00156 ID. Prindle, L.M. 156 Surface of bench 500 feet above level of Seventymile. Eagle district, Yukon region, Alaska. 1903. Plate 3-B in U.S. Geological Survey. Bulletin 251. 1905. Plate 5-B in U.S. Geological Survey. Bulletin 538. 1913. #1:/Alaska-Bulletin 251/plm00171 ID. Prindle, L.M. 171 Glacier Mountain. Eagle district, Yukon region, Alaska. 1903. Plate 2-B in U.S. Geological Survey. Bulletin 251. 1905. #1:/Alaska-Bulletin 251/plm00200 ID. Prindle, L.M. 200 Schists on South Fork of Birch Creek. Circle district, Yukon region, Alaska. 1903. Plate 5-A in U.S. Geological Survey. Bulletin 251. 1905. #1:/Alaska-Bulletin 538/plm00205 ID. Prindle, L.M. 205 Schist ridge between north fork of Birch Creek and Crooked Creek, altitude about 3,400 feet. Circle district, Yukon region, Alaska. 1904. Plate 3-A in U.S. Geological Survey. Bulletin 538. 1913. #1:/Alaska-Bulletin 251/plm00206 ID. Prindle, L.M. 206 Steam shovel operating on Mammoth Creek. Circle district, Yukon region, Alaska. 1903. Plate 14-A in U.S. Geological Survey. Bulletin 251. 1905. #1:/Alaska-Bulletin 251/plm00207 ID. Prindle, L.M. 207 Bed of Mastoon Creek worked by open cuts. Fairbanks district, Yukon region, Alaska. 1903. Plate 14-B in U.S. Geological Survey. Bulletin 251. 1905. #1:/Alaska-Bulletin 538/plm00208 ID. Prindle, L.M. 208 Down Mastodon Creek. Circle district, Yukon region, Alaska. 1904. Plate 13-A in U.S. Geological Survey. Bulletin 538. 1913. #1:/Alaska-Bulletin 251/plm00214 ID. Prindle, L.M. 214 Thawing apparatus on Cleary Creek. Fairbanks district, Yukon region, Alaska. 1903. Plate 15-B in U.S. Geological Survey. Bulletin 251. 1905. #1:/Alaska-Bulletin 251/plm00218 ID. Prindle, L.M. 218 Sluicing on Pedro Creek. Fairbanks district, Yukon region, Alaska. 1903. Plate 15-A in U.S. Geological Survey. Bulletin 251. 1905. #1:/Alaska-Bulletin 525/plm00251 ID. Prindle, L.M. 251 The Yukon valley at Eagle, Eagle district, Yukon region, Alaska. C. 1905. Plate 4-B in U.S. Geological Survey. Bulletin 525. 1913. #1:/Alaska-Bulletin 538/plm00278 ID. Prindle, L.M. 278 Ice-filled stream flat, Goodpasture River. Circle district, Yukon region, Alaska. 1904. Plate 7-A in U.S. Geological Survey. Bulletin 538. 1913. #1:/Alaska-Bulletin 525/plm00289 ID. Prindle, L.M. 289 Typical valley and upland topography in Salchaket region. Fairbanks district, Yukon region, Alaska. C. 1905. Plate 5-A in U.S. Geological Survey. Bulletin 525. 1913. #1:/Alaska-Bulletin 280/plm00347 ID. Prindle, L.M. 347 Northeastward along the ridges of the White Mountains. Preacher district, Yukon region, Alaska. 1904. Plate 2-A in U.S. Geological Survey. Bulletin 280. 1906. #1:/Alaska-Bulletin 280/plm00355 ID. Prindle, L.M. 355 Southeastward toward the head of Golden creek. Hot Springs district, Yukon region, Alaska. 1904. Plate 2-B in U.S. Geological Survey. Bulletin 280. 1906. #1:/Alaska-Bulletin 280/plm00367 ID. Prindle, L.M. 367 Westward up Quail creek from the east side of Troublesome creek, Wolverine Mountain in the background. Rampart district, Yukon region, Alaska. 1904. Plate 7-B in U.S. Geological Survey. Bulletin 280. 1906. #1:/Alaska-Bulletin 280/plm00387 ID. Prindle, L.M. 387 Valley of Glenn creek, looking north, showing sluices, etc. Rampart district, Yukon region, Alaska. 1904. Plate 7-A in U.S. Geological Survey. Bulletin 280. 1906. #1:/Alaska-Bulletin 375/plm00418 ID. Prindle, L.M. 418 Flat-topped ridge of quartzite schist, between Davis and Poker creeks, altitude about 3,800 feet. Fortymile district, Yukon region, Alaska. 1903. Plate 2-A in U.S. Geological Survey. Bulletin 375. #1:/Alaska-Bulletin 538/plm00433 ID. Prindle, L.M. 433 Augen gneiss intrusive into Birch Creek schist. Circle district, Yukon region, Alaska. 1904. Plate 8-B in U.S. Geological Survey. Bulletin 538. 1913. Plate 7-A in U.S. Geological Survey. Bulletin 827. 1931. #1:/Alaska-Bulletin 525/plm00450 ID. Prindle, L.M. 450 Interbedded schists and quartzites of Birch Creek schist. Fairbanks district, Yukon region, Alaska. C. 1905. Plate 9-B in U.S. Geological Survey. Bulletin 525. 1913. Plate 8-A in U.S. Geological Survey. Bulletin 538. 1913. #1:/Alaska-Bulletin 525/plm00457 ID. Prindle, L.M. 457 Residual granite bosses on dissected peneplain. Wood River district, Yukon region, Alaska. C. 1905. Plate 10-B in U.S. Geological Survey. Bulletin 525. 1913. #1:/Klondike Gold Rush National Historic Park/plm00471 ID. Prindle, L.M. 471 Klondike Gold Rush National Historic Park, Alaska. White Pass and Yukon Railroad train enroute to Skagway, taken from the train. There is a mix of freight and passenger cars. 1906. #1:/Klondike Gold Rush National Historic Park/plm00472 ID. Prindle, L.M. 472 Klondike Gold Rush National Historic Park, Alaska. White Pass and Yukon train with freight and passenger cars, on a trestle, with mining operation below the bridge. 1906. #1:/Alaska-Professional paper 70/plm00492 ID. Prindle, L.M. 492 Kenai rocks on Adams Creek, a tributary of the Totatlankia, at northern front of Alaska Range. Wood River district, Yukon region, Alaska. 1902. Plate 16-A in U.S. Geological Survey. Professional paper 70. 1910. #1:/Prindle L.M. Collection/plm00539 ID. Prindle, L.M. 539 Native Indians at Baker Creek. Hot Springs district, Yukon region, Alaska. C. 1905. #1:/Alaska-Bulletin 525/plm00552 ID. Prindle, L.M. 552 Placer mining plant on Ester Creek Fairbanks district, Yukon region, Alaska. C. 1905. Plate 12-A in U.S. Geological Survey. Bulletin 525. 1913. #1:/Alaska-Bulletin 525/plm00555 ID. Prindle, L.M. 555 Bucket dumper showing apron and dump box. Fairbanks district, Yukon region, Alaska. C. 1905. Plate 21-A in U.S. Geological Survey. Bulletin 525. 1913. #1:/Alaska-Bulletin 525/plm00558 ID. Prindle, L.M. 558 Prospecting by drilling. Fairbanks district, Yukon region, Alaska. C. 1905. Plate 20-A in U.S. Geological Survey. Bulletin 525. 1913. #1:/Alaska-Bulletin 525/plm00561 ID. Prindle, L.M. 561 Double dumper. Fairbanks district, Yukon region, Alaska. C. 1905. Plate 21-B in U.S. Geological Survey. Bulletin 525. 1913. #1:/Alaska-Bulletin 525/plm00576 ID. Prindle, L.M. 576 Dump of auriferous gravels on Goldstream Creek. Fairbanks district, Yukon region, Alaska. C. 1905. Plate 20-B in U.S. Geological Survey. Bulletin 525. 1913 #1:/Alaska-Bulletin 525/plm00585 ID. Prindle, L.M. 585 Up Dome Creek, near Fairbanks. Fairbanks district, Yukon region, Alaska. C. 1905. Plate 5-B in U.S. Geological Survey. Bulletin 525. 1913. #1:/Glacier Alaska/ran00001 ID. Ranta, T.W. 1 View easterly from top at the head of Rock Creek. Gulkana district, Copper River region. Alaska. June 22, 1938. #1:/Glacier Alaska/ran00002 ID. Ranta, T.W. 2 Tanada Lake from top at the head of Rock Creek. Sanford district, Copper River region. Alaska. June 22, 1938. #1:/Glacier Alaska/ran00041 ID. Ranta, T.W. 41 Fairweather Range. Lituya district, Alaska Gulf region. Alaska. June 11, 1939. #1:/Glacier Alaska/ran00042 ID. Ranta, T.W. 42 Fairweather Range. Lituya district, Alaska Gulf region. Alaska. June 11, 1939. #1:/Glacier Alaska/ran00043 ID. Ranta, T.W. 43 Fairweather Range. Lituya district, Alaska Gulf region. Alaska. June 11, 1939. #1:/Glacier Alaska/ran00044 ID. Ranta, T.W. 44 Fairweather Range. Lituya district, Alaska Gulf region. Alaska. June 11, 1939. #1:/Glacier Alaska/ran00045 ID. Ranta, T.W. 45 Fairweather Range. Lituya district, Alaska Gulf region. Alaska. June 11, 1939. #1:/Glacier Alaska/ran00046 ID. Ranta, T.W. 46 Fairweather Range. Lituya district, Alaska Gulf region. Alaska. June 11, 1939. #1:/Glacier Alaska/ran00047 ID. Ranta, T.W. 47 Fairweather Range. Lituya district, Alaska Gulf region. Alaska. June 11, 1939. #1:/Glacier Alaska/ran00048 ID. Ranta, T.W. 48 Columbia Glacier. Valdez district, Alaska Gulf region. Alaska. June 12, 1939. #1:/Glacier Alaska/ran00049 ID. Ranta, T.W. 49 Columbia Glacier. Valdez district, Alaska Gulf region. Alaska. June 12, 1939. #1:/Glacier Alaska/ran00050 ID. Ranta, T.W. 50 Columbia Glacier. Valdez district, Alaska Gulf region. Alaska. June 12, 1939. #1:/Wisconsin-Bulletin 273/awc00021 ID. Alden, W.C. 21 Contorted beds of stratified clay and sand, exposed in road cut through a drumlin 1.5 miles east of Hebron. Jefferson County, Wisconsin. June 1900. Plate 3-B in U.S. Geological Survey. Bulletin 273. 1905. #1:/Illinois-Folio 81/awc00027 ID. Alden, W.C. 27 A typical section of glacial drift from the drift area North America. Illinois. 1901. Figure 17 in U.S. Geological Survey. Folio 81. 1902. #1:/Wisconsin-Professional paper 34/awc00031 ID. Alden, W.C. 31 Kames near Bass Lake, 3 miles southeast of Whitewater. Sec. 26, T. 4N., R. 15 E. Whitewater quadrangle, Walworth County, Wisconsin. July 19, 1900, plate 8-B in U.S. Geological Survey. Professional paper 34. 1904. #1:/Wisconsin-Professional paper 34/awc00032 ID. Alden, W.C. 32 Partial section of the Kettle Range at the abandoned railway cut at Tree bluff, 4 miles southeast of Whitewater, showing the narrow crest and the coarseness and lack of assortment of material. Sec. 24, T. 4 N., R 15 E. Whitewater quadrangle, Walworth County, Wisconsin. July 19, 1900, plate 9-A in U.S. Geological Survey. Professional paper 34. 1904. #1:/Wisconsin-Professional paper 34/awc00033 ID. Alden, W.C. 33 Lake cliff at Racine, Sec. 21, T. 3 N., R. 23 E., Racine quadrangle, Racine County, Wisconsin. June 1899, plate 9-B in U.S. Geological Survey. Professional paper 34. 1904, figure 22 in U. S. Geological Survey. Folio 81, 1902, plate 130-B in U. S. Geological Survey. Professional paper 60, 1908. #1:/Wisconsin-Professional paper 34/awc00034 ID. Alden, W.C. 34 Bald bluff a prominent salient of the inner or west face of the Kettle Range, 2.5 miles southwest of Palmyra, as seen from the southwest. Sec. 33 T. 5 N., R. 16 E., Whitewater quadrangle, Jefferson County, Wisconsin. June 1900, plate 8-A in U.S. Geological Survey. Professional paper 34. 1904. #1:/Professional paper 106-Wisconsin/awc00042 ID. Alden, W.C. 42 Kames 3 miles northwest of Oconomowoc, Waukesha County, Wisconsin. June 1900. Plate 31-A in U.S. Geological Survey. Professional paper 106. 1918. #1:/Professional paper 106-Wisconsin/awc00048 ID. Alden, W.C. 48 Transverse profile of drumlin shown in Alden 52, from the north: SW 1/4 sec. 32, T. 7 N., R. 16 E. Waterton quadrangle, Jefferson County, Wisconsin. August 1904. Plate 25- B in U.S. Geological Survey. Professional paper 106. 1918. #1:/Wisconsin-Bulletin 273/awc00049 ID. Alden, W.C. 49 Transverse profile of drumlin about 2 miles north of Sullivan, viewed from the north. Jefferson County, Wisconsin. August 1904. Plate 3-B in U.S. Geological Survey. Bulletin 273. 1905. #1:/Professional paper 106-Wisconsin/awc00052 ID. Alden, W.C. 52 Drumlin 2 miles west of Sullivan, from the northeast: SW1/4 sec. 32, T. 7 N., R. 16 E. Waterton quadrangle, Jefferson County, Wisconsin. August 1904. Plate 25-A in U.S. Geological Survey. Professional paper 106. 1918. #1:/Professional paper 106-Wisconsin/awc00053 ID. Alden, W.C. 53 Giant pothole in Niagara dolomite filled with glacial drift at Lake Shore Stone Co.'s quarry, Lannon, NE1/4 sec. 18, T. 8 N., R. 20 E., Waukesha quadrangle, Waukesha County, Wisconsin. October 16, 1904. Plate 22-A in U.S. Geological Survey. Professional paper 106. 1918. #1:/Wisconsin-Bulletin 273/awc00063 ID. Alden, W.C. 63 Transverse profile of a drumlin 5 miles southeast of Stoughton, viewed from the north. Dane County, Wisconsin. July 21, 1902. Plate 4-A in U.S. Geological Survey. Bulletin 273. 1905. #1:/Professional paper 106-Wisconsin/awc00077 ID. Alden, W.C. 77 Ledge of quartzite 2 miles west of Hubbleton, Waterloo quadrangle, Dodge County, Wisconsin. September 1903. Plate 8-A, with barn deliberately obscured, in U.S. Geological Survey. Professional paper 106. 1918. Plate 7-B in U.S. Geological Survey. Bulletin 273. 1905. #1:/Wisconsin-Bulletin 273/awc00078 ID. Alden, W.C. 78 Ledge of quartzite 4 miles northeast of Waterloo, viewed from the west. Dodge County, Wisconsin. September 1903. Plate 7-A in U.S. Geological Survey. Bulletin 273. 1905. #1:/Professional paper 106-Wisconsin/awc00087 ID. Alden, W.C. 87 Quartzite at north side of Stony Island, 4 miles northeast of Waterloo, showing glacially smooth surface. Waterloo quadrangle, Dodge County, Wisconsin. October 17, 1903. Plate 8-B in U.S. Geological Survey. Professional paper 106. 1918. #1:/Professional paper 106-Wisconsin/awc00090 ID. Alden, W.C. 90 Schistosity developed in quartzite by shearing along bedding planes in O'Laughlin's Quarry 2.5 miles northeast of Waterloo, Waterloo quadrangle, Dodge County, Wisconsin. September 1903. Plate 9-A in U.S. Geological Survey. Professional paper 106. 1918. #1:/Professional paper 106-Wisconsin/awc00091 ID. Alden, W.C. 91 Longitudinal section of esker three-quarters of a mile west of Waterloo, Hayhurst's gravel pit from the east; SW sec. 6, T. 8 N., R. 13, E. Waterloo quadrangle, Jefferson | County, Wisconsin. September 1903. Plate 32-B in U.S. Geological Survey. Professional paper 106. 1918. #1:/Professional paper 106-Wisconsin/awc00092 ID. Alden, W.C. 92 Basal conglomerate on north slope of Waterloo quartzite at horizon of St. Peter sandstone, roadside gully in sec. 27, Portland Township, Dodge County, Wisconsin. October 17, 1903. Plate 9-B in U.S. Geological Survey. Professional paper 106. 1918. #1:/Wisconsin-Bulletin 273/awc00093 ID. Alden, W.C. 93 Road cut through a drumlin 1 mile east of Johnson creek, showing exposure of stratified sand and clay interbedded with till. Jefferson County, Wisconsin. August 1904. Plate 9-B in U.S. Geological Survey. Bulletin 273. 1905. #1:/Wisconsin-Bulletin 273/awc00096 ID. Alden, W.C. 96 Road cut 1 mile east of Johnson creek, showing in detail the distortion of stratified beds of clay and sand exposed. Jefferson County, Wisconsin. August 1904. Plate 9-A in U.S. Geological Survey. Bulletin 273. 1905. #1:/Professional paper 106-Wisconsin/awc00097 ID. Alden, W.C. 97 Section of part of drumlin 5 miles northeast of Waterloo, showing cleavage developed in clay matrix of the till: SE1/4 sec. 21, T.9N., R. 14 E., Waterloo quadrangle, Dodge County, Wisconsin. August 1904. Plate 29-A in U.S. Geological Survey. Professional paper 106. 1918. Plate 8-B in U.S. Geological Survey. Bulletin 273. 1905. #1:/Professional paper 106-Wisconsin/awc00109 ID. Alden, W.C. 109 Wave cut terrace south of Fox Point, probably formed at the Nipissing stage of the Great Lakes; ancient cliff till at left. Fox Point in the distance. NE1/4 sec. 21 T. 8 N., R. 22 E.: Milwaukee quadrangle, Milwaukee County, Wisconsin. October 19, 1903. Plate 39 in U.S. Geological Survey. Professional paper 106. 1918. Figure 11 in U.S. Geological Survey. Folio 140. 1906. #1:/Wisconsin-Folio 140/awc00112 ID. Alden, W.C. 112 Cement rock quarry in Milwaukee formation at Berthelet, just north of Milwaukee. Milwaukee County, Wisconsin. October 1899. Figure 13 in U.S. Geological Survey. Folio 140. 1906. #1:/Professional paper 106-Wisconsin/awc00114 ID. Alden, W.C. 114 Building stone quarry in Niagara dolomite at Wauwatosa, from the northwest, N 1/2 sec. 26, T & N., R 21 E. Milwaukee quadrangle, Milwaukee County, Wisconsin. October 1899. Plate 12-A in U.S. Geological Survey. Professional paper 106. 1918. Plate 20-B in U.S. Geological Survey. Water-supply paper 489. 1923. Figure 12 in U.S. Geological Survey. Folio 140. 1906. #1:/Professional paper 106-Wisconsin/awc00115 ID. Alden, W.C. 115 Niagara dolomite, reef rock in old quarry, Wauwatosa, the well stratified beds at the left merge into the massive irregular textured dolomite that forms the body of the rock mound at the right. Sec. 22, T. 7 N., R. 21 E. Milwaukee quadrangle, Milwaukee County, Wisconsin. October 1899. Plate 12-B in U.S. Geological Survey. Professional paper 106. 1918. Figure 10 in U.S. Geological Survey. Folio 140. 1906. #1:/Wisconsin-Bulletin 273/awc00131 ID. Alden, W.C. 131 Transverse profile of drumlin 2 miles northeast of McFarland, viewed from the northeast. Dane County, Wisconsin. October 1, 1902. Plate 5-A in U.S. Geological Survey. Bulletin 273. 1905. #1:/Wisconsin-Bulletin 273/awc00133 ID. Alden, W.C. 133 Drumlin 2 miles northeast of McFarland, viewed from the west. Dane County, Wisconsin. October 1, 1902. Plate 4-B in U.S. Geological Survey. Bulletin 273. 1905. #1:/Wisconsin-Bulletin 273/awc00135 ID. Alden, W.C. 135 Transverse profile of double crested drumlin at McFarland, viewed from the south. Dane County, Wisconsin. October 1, 1902. Plate 6-A in U.S. Geological Survey. Bulletin 273. 1905. #1:/Wisconsin-Bulletin 273/awc00136 ID. Alden, W.C. 136 Longitudinal profile of a double crested drumlin at McFarland, viewed from the east. Dane County, Wisconsin. October 1, 1902. Plate 5-B in U.S. Geological Survey. Bulletin 273. 1905. #1:/Wisconsin-Bulletin 273/awc00137 ID. Alden, W.C. 137 Transverse profile of a triple crested drumlin at McFarland, viewed from the south. Dane County, Wisconsin. October 1, 1902. Plate 6-B in U.S. Geological Survey. Bulletin 273. 1905. #1:/Wisconsin-Professional paper 34/awc00153 ID. Alden, W.C. 153 Section of kame 1 mile north of Burlington, showing the poor assortment and the water worn character of the material. NW1/4 sec. 29, T. 3N., R,19 E. Lake Geneva quadrangle, Racine County, Wisconsin. August 1899, plate 6-A in U.S. Geological Survey. Professional paper 34. 1904. #1:/Wisconsin-Professional paper 34/awc00156 ID. Alden, W.C. 156 Outwash gravels overlying Galena limestone at head of the Turtle Creek rock gorge at Carvers Rock, 3.5 miles northeast of Clinton Junction. S1/2 sec. 27, T. 2 N., R. 14, E. Shopiere quadrangle, Rock County, Wisconsin. July 13, 1901, plate 6-B in U.S. Geological Survey. Professional paper 34. 1904. #1:/Wisconsin-Professional paper 34/awc00157 ID. Alden, W.C. 157 View at a point 2.5 miles northwest of the village of Allens Grove, where the Chicago, Milwaukee and St. Paul Railway passes from the upper to the lower outwash terrace. NE sec. 26, T. 2 N., R. 14 E. Shopiere quadrangle, Rock County, Wisconsin. July 13, 1901, plate 7-B in U.S. Geological Survey. Professional paper 34. 1904. #1:/Professional paper 106-Wisconsin/awc00160 ID. Alden, W.C. 160 Rock Pillar, St. Peter sandstone near Footville, the result of post Illinoian weathering. sec. 31, T. 3 N., R. 11 E. Janesville quadrangle, Rock County, Wisconsin. August 28, 1901. Plate 16-A in U.S. Geological Survey. Professional paper 106. 1918. #1:/Wisconsin-Professional paper 34/awc00176 ID. Alden, W.C. 176 The valley of the Rock River 2.5 miles north of Janesville, looking north, NE1/4 sec. 23, T. 3 N., R. 12 E. Janesville quadrangle, Rock County, Wisconsin. September 16, 1901, plate 7-A in U.S. Geological Survey. Professional paper 34. 1904. #1:/Professional paper 106-Wisconsin/awc00177 ID. Alden, W.C. 177 Stratified sand and gravel (outwash deposits) from the Green Bay glacier in the southeastern part of Janesville, Rock County, Wisconsin. July 2, 1904. Plate 24-A in U.S. Geological Survey. Professional paper 106. 1918. #1:/Professional paper 106-Wisconsin/awc00178 ID. Alden, W.C. 178 Details of same deposit in Alden 177; Outwash gravels in Dr. E.D. gravel pit, Rock River valley, south part of Janesville, Rock County, Wisconsin. July 2, 1904. Plate 24-B in U.S. Geological Survey. Professional paper 106. 1918. #1:/Illinois-Folio 81/awc00180 ID. Alden, W.C. 180 Glaciated pebbles from the drift of Chicago characteristic sub angular shapes and scratched surfaces. Figure 18 in U.S. Geological Survey. Folio 81. 1902. #1:/Massachusetts-Images/awc00191 ID. Alden, W.C. 191 Grooves and striations in glaciated ledge on the crest of the southeast slope of buried preglacial valley of the Nashua River, Marlboro quadrangle, Worcester County, Massachusetts. 1906. Lower left photograph page 18, Images of the U.S. Geological Survey, 1879-1979. #1:/Alden W.C. Collection/awc00229 ID. Alden, W.C. 229 Pothole worn through ledge below dam at Blackstone. Blackstone quadrangle. Worcester County, Massachusetts. 1906. #1:/Alden W.C. Collection/awc00230 ID. Alden, W.C. 230 Pothole containing pebbles, bed of Blackstone River, below the dam. Worcester County, Massachusetts. September 26, 1906. #1:/Acadia National Park/awc00276 ID. Alden, W.C. 276 Acadia National Park, Maine. Glacial gorges between Green Mountain, Pemetic Mountain and The Bubbles, looking south from the north end of Eagle Lake, 2 miles west of Bar Harbor. September 11, 1907. #1:/Acadia National Park/awc00277 ID. Alden, W.C. 277 Acadia National Park, Maine. Glacial gorges between Green Mountain, Pemetic Mountain and The Bubbles, looking south from the north end of Eagle Lake, 2 miles west of Bar Harbor. September 11, 1907. #1:/Acadia National Park/awc00278 ID. Alden, W.C. 278 Acadia National Park, Maine. Glacial gorges between Green Mountain, Pemetic Mountain and The Bubbles, looking south from the north end of Eagle Lake, 2 miles west of Bar Harbor. September 11, 1907. #1:/Acadia National Park/awc00279 ID. Alden, W.C. 279 Acadia National Park, Maine. Glacial gorges between Green Mountain, Pemetic Mountain and The Bubbles, looking south from the north end of Eagle Lake, 2 miles west of Bar Harbor. September 11, 1907. #1:/Acadia National Park/awc00280 ID. Alden, W.C. 280 Acadia National Park, Maine. South-southeast to the north slope of Green Mountain, viewed from the southern slope of McFarland Mountain, 3 miles west of Bar Harbor. September 11, 1907. #1:/Acadia National Park/awc00281 ID. Alden, W.C. 281 Acadia National Park, Maine. South through Jordan Pond Gorge from The Bubbles to Jordan Pond house and Barr Mill and Cranberry Islands, viewed from Mount Desert Island. September 12, 1907. #1:/Acadia National Park/awc00282 ID. Alden, W.C. 282 Acadia National Park, Maine. South through Jordan Pond Gorge from The Bubbles to Jordan Pond house and Barr Mill and Cranberry Islands, viewed from Mount Desert Island. September 12, 1907. #1:/Acadia National Park/awc00283 ID. Alden, W.C. 283 Acadia National Park, Maine. South through Jordan Pond Gorge from The Bubbles to Jordan Pond house and Barr Mill and Cranberry Islands, viewed from Mount Desert Island. September 12, 1907. #1:/Acadia National Park/awc00285 ID. Alden, W.C. 285 Acadia National Park, Maine. Northeast to Ben Mountain col, viewed from the crest of Cedar Swamp Mountain. Sargent Mountain Pond above and Sargent amphitheater below; Jordan Mountain on the right. September 12, 1907. #1:/Acadia National Park/awc00286 ID. Alden, W.C. 286 Acadia National Park, Maine. Northeast to Ben Mountain col, viewed from the crest of Cedar Swamp Mountain. Sargent Mountain Pond above and Sargent amphitheater below; Jordan Mountain on the right. September 12, 1907. #1:/Acadia National Park/awc00287 ID. Alden, W.C. 287 Acadia National Park, Maine. Sargent Mountain Pond in a rock basin at 1,050 feet altitude. Joints and plucked cliffs in the foreground; glacially smoothed crest above. September 12, 1907. #1:/Acadia National Park/awc00288 ID. Alden, W.C. 288 Acadia National Park, Maine. West along the line of glaciated mountain summits, viewed from the crest of Jordan Mountain at 1,018 feet altitude. September 12, 1907. #1:/Acadia National Park/awc00289 ID. Alden, W.C. 289 Acadia National Park, Maine. Southwest from Ben's Peak to northeast harbor. Cliffs due to plucking from joint faces. Upper edges are rounded, crests smoothed. Some blocks protrude 8 inches due to frost action. September 12, 1907. #1:/Acadia National Park/awc00290 ID. Alden, W.C. 290 Acadia National Park, Maine. South along the crest of Sargent and Jordan Mountains to Cranberry Islands. September 12, 1907. #1:/Acadia National Park/awc00291 ID. Alden, W.C. 291 Acadia National Park, Maine. North from the crest of Green Mountain over Bar Harbor, Frenchman's Bay, Porcupine Islands to the mainland. September 14, 1907. #1:/Acadia National Park/awc00292 ID. Alden, W.C. 292 Acadia National Park, Maine. West slope of Pemetic Mountain, viewed from Jordan Mountain across Jordan Pond. September 12, 1907. #1:/Acadia National Park/awc00293 ID. Alden, W.C. 293 Acadia National Park, Maine. Panoramic view from Eagle Crag on the east slope of the south end of Green Mountain. Dry Mountain on the left; Pickett Mountain, Newport Mountain, Beehive and Gorham Mountain on the right. September 14, 1907. See also photos awc00294 and awc00295. #1:/Acadia National Park/awc00294 ID. Alden, W.C. 294 Acadia National Park, Maine. Panoramic view from Eagle Crag on the east slope of the south end of Green Mountain. Dry Mountain on the left; Pickett Mountain, Newport Mountain, Beehive and Gorham Mountain on the right. September 14, 1907. See also photos awc00293 and awc00295. #1:/Acadia National Park/awc00295 ID. Alden, W.C. 295 Acadia National Park, Maine. Panoramic view from Eagle Crag on the east slope of the south end of Green Mountain. Dry Mountain on the left; Pickett Mountain, Newport Mountain, Beehive and Gorham Mountain on the right. September 14, 1907. See also photos awc00293 and awc00294. #1:/Acadia National Park/awc00296 ID. Alden, W.C. 296 Acadia National Park, Maine. Jordan and Sargent Mountains, The Bubbles, Pemetic Mountain north slope. Glacially smoothed crests and cliffs are due to plucking along joint faces. View is northeast from the upper east slope of Jordan Mountain at 920 feet altitude. September 14, 1907. #1:/Acadia National Park/awc00297 ID. Alden, W.C. 297 Acadia National Park, Maine. Jordan Mountain on the left; The Bubbles in the center; Pemetic Mountain on the right. Lower slopes are not talus cliffs due to jointing and glacial plucking. View is northeast from the upper east slope of Jordan Mountain at 920 feet altitude. September 12, 1907. #1:/Acadia National Park/awc00298 ID. Alden, W.C. 298 Acadia National Park, Maine. South along the cliff face at the south end of Jordan Mountain toward the south end of Jordan Pond. The steps to the amphitheater are 3 to 5 feet each due to jointing and glacial plucking. September 12, 1907. #1:/Acadia National Park/awc00299 ID. Alden, W.C. 299 Acadia National Park, Maine. Green Mountain Gorge between Green Mountain and Dry Mountain. View is north from the east slope of Green Mountain at 850 feet altitude. September 14, 1907. #1:/Acadia National Park/awc00300 ID. Alden, W.C. 300 Acadia National Park, Maine. South through Green Mountain gorge to Otter Creek. Bold cliffs are due to glacial plucking along joint faces and subsequent frost action. September 14, 1907. #1:/Acadia National Park/awc00301 ID. Alden, W.C. 301 Acadia National Park, Maine. Joints permitting development of the gorge by plucking and postglacial talus due to frost action. View is north through Green Mountain Gorge from a point on the east slope. September 14, 1907. #1:/Acadia National Park/awc00303 ID. Alden, W.C. 303 Acadia National Park, Maine. Rice Point on the west end of Sutton Hill. V-shaped bar is built of coarse cobble stones, beach gravel, 15 to 20 feet high. Lagoon in the foreground is flooded at high tide. September 14, 1907. #1:/Acadia National Park/awc00305 ID. Alden, W.C. 305 Acadia National Park, Maine. Barrier beach at the head of Bracey's Cove. 1907. #1:/Acadia National Park/awc00306 ID. Alden, W.C. 306 Acadia National Park, Maine. Stratified glacial sand and gravel, 1 mile north of Asticou, northeast of Lower Hadley Pond. September 14, 1907. #1:/Professional paper 106-Wisconsin/awc00309 ID. Alden, W.C. 309 St. Peter sandstone west of Browntown; showing results of differential weathering: NW1/4 sec. 5, T. 1 N., R.6 E. Green County, Wisconsin. July 20, 1907. Plate 10-A in U.S. Geological Survey. Professional paper 106. 1918. #1:/Professional paper 106-Wisconsin/awc00311 ID. Alden, W.C. 311 Galena dolomite exposed in Illinois Central Railroad cut east of Monroe station. The surface is deeply weathered and overlain by residual clay and brown loamy clay. Drift is absent or nearly so. Green County, Wisconsin. July 27, 1907. Plate 16-B in U.S. Geological Survey. Professional paper 106. 1918. #1:/Professional paper 106-Wisconsin/awc00315 ID. Alden, W.C. 315 Tower Rock, a bluff of "Potsdam" sandstone in the driftless area, 2 miles south of Denzer, NE1/4 sec. 28, T. 10 N., R.5 E. Denzer quadrangle, Sauk County, Wisconsin. September 3, 1907. Plate 5-A in U.S. Geological Survey. Bulletin 273. 1905. #1:/Professional paper 106-Wisconsin/awc00320 ID. Alden, W.C. 320 Mature erosion topography on galena and Trenton dolomites in driftless area northeast of Monroe, very little if any of the upland remains not reduced to slope. Green County, Wisconsin. July 1907. Plate 17-A in U.S. Geological Survey. Professional paper 106. 1918. #1:/Professional paper 106-Wisconsin/awc00324 ID. Alden, W.C. 324 Mature erosion topography on galena and Trenton dolomites thinly covered with Illinoian drift 3 miles east of Monroe, very little if any of the upland remains not reduced to slope. Green County, Wisconsin. July 27, 1907. Plate 17-B in U.S. Geological Survey. Professional paper 106. 1918. #1:/Professional paper 106-Wisconsin/awc00327 ID. Alden, W.C. 327 Erosion towers of St. Peter sandstone 4 miles southeast of Monticello, the result of post Illinoian weathering. Green County, Wisconsin. July 26, 1907. Plate 11-B in U.S. Geological Survey. Professional paper 106. 1918. #1:/Professional paper 106-Wisconsin/awc00331 ID. Alden, W.C. 331 Formed as panorama of sandstone bluffs bordering Wisconsin River, opposite of Prairie du Sac. Sauk County, Wisconsin. September 1, 1907. Plate 6 in U.S. Geological Survey. Professional paper 106. 1918. #1:/Professional paper 106-Wisconsin/awc00332 ID. Alden, W.C. 332 Formed as panorama of sandstone bluffs bordering Wisconsin River, opposite of Prairie du Sac. Sauk County, Wisconsin. September 1, 1907. Plate 6 in U.S. Geological Survey. Professional paper 106. 1918. #1:/Professional paper 106-Wisconsin/awc00334 ID. Alden, W.C. 334 Surface of morainal drift north of Blackhawk Bluff in the Wisconsin River valley a mile northeast of Prairie du Sac. Sauk County, Wisconsin. September 1, 1907. Plate 22-B in U.S. Geological Survey. Professional paper 106. 1918. #1:/Professional paper 106-Wisconsin/awc00340 ID. Alden, W.C. 340 Kame, Kewaskum, Dodge County, Wisconsin. September 23, 1908. Plate 34-B in U.S. Geological Survey. Professional paper 106. 1918. #1:/Professional paper 106-Wisconsin/awc00343 ID. Alden, W.C. 343 Terminal moraine topography: two miles south of Greenbush, Sheboygan County, Wisconsin. August 10, 1910. Plate 34-A in U.S. Geological Survey. Professional paper 106. 1918. #1:/Professional paper 106-Wisconsin/awc00364 ID. Alden, W.C. 364 Transverse profile of dome shaped drumlin 9 miles southeast of Fond du Lac, T. 15 N., R. 18 E. Fond du Lac County, Wisconsin. September 9, 1908. Plate 29-B in U.S. Geological Survey. Professional paper 106. 1918. #1:/Professional paper 106-Wisconsin/awc00370 ID. Alden, W.C. 370 Terminal moraine of red glacial drift overlapping a lake border moraine of bluish gray drift: 3 miles northeast of Random Lake, Sheboygan County, Wisconsin. August 22, 1908. Plate 35-A in U.S. Geological Survey. Professional paper 106. 1918. #1:/Professional paper 106-Wisconsin/awc00381 ID. Alden, W.C. 381 Illinoian upland drift plain of remarkably long gentle uneroded slope 10 miles west of Rockford; the drift is probably of moderate thickness, overlain by a few feet of loess and underlain by Galena dolomite. Winnebago County, Wisconsin. June 14, 1908. Plate 18- A in U.S. Geological Survey. Professional paper 106. 1918. #1:/Professional paper 106-Wisconsin/awc00388 ID. Alden, W.C. 388 Illinoian drift exposed in Chicago, Milwaukee & Gary railway cut 7 miles south of Rockford; the lower part is dense calcareous unmodified boulder clay; upper 8 feet is gravelly leached and oxidized drift, all limestone pebbles and limestone flour are removed from latter by solution. Winnebago County, Wisconsin. June 22, 1908. Plate 18-B in U.S. Geological Survey. Professional paper 106. 1918. #1:/Professional paper 106-Wisconsin/awc00401 ID. Alden, W.C. 401 Later Wisconsin glacial morainal till overlying stratified sand, south side of Wisconsin River, 2 miles above Prairie du Sac. Sauk County, Wisconsin. June 10, 1909. Plate 19-B in U.S. Geological Survey. Professional paper 106. 1918. #1:/Professional paper 106-Wisconsin/awc00413 ID. Alden, W.C. 413 East Bluff, Devil's Lake, gorge showing great talus accumulation of quartzite blocks. Plate 7-B in U.S. Geological Survey. Professional paper 106. 1918. #1:/Professional paper 106-Wisconsin/awc00415 ID. Alden, W.C. 415 Loess overlying glacial till of the Wisconsin stage, Chicago, Milwaukee & St. Paul railway cut 3 miles northwest of Fall River; Sec. 20, T. 11 N., R. 12 E. Columbia County, Wisconsin. June 29, 1909. Plate 35-B in U.S. Geological Survey. Professional paper 106. 1918. #1:/Professional paper 106-Wisconsin/awc00431 ID. Alden, W.C. 431 Esker 2 miles southeast of Randolph; SW1/4, sec. 18 T.12 N., R.13 E. Dodge County, Wisconsin. September 7, 1909. Plate 31-B in U.S. Geological Survey. Professional paper 106. 1918. #1:/Professional paper 106-Wisconsin/awc00435 ID. Alden, W.C. 435 Rhyolite breccia exposed in Precambrian ledges 1.5 miles southwest of Marquette, NW1/4, NW1/4, sec. 2, T. 14 N., R. 11 E. Green Lake County, Wisconsin. September 18, 1909. Plate 7-A in U.S. Geological Survey. Professional paper 106. 1918. #1:/Professional paper 106-Wisconsin/awc00433 ID. Alden, W.C. 433 Transverse section of esker 2 miles southeast of Randolph: SW1/4, sec. 18 T.12 N., R.13 E. Dodge County, Wisconsin. September 7, 1909. Plate 32-A in U.S. Geological Survey. Professional paper 106. 1918. #1:/Professional paper 106-Wisconsin/awc00437 ID. Alden, W.C. 437 Glacially smoothed and striated surface of rhyolite ledge, a mile southwest of Marquette: showing crescentic chatter marks. SE1/4, NW1/4 sec. 34, T. 16 N., R. 11 E. Green Lake County, Wisconsin. September 18, 1908. Plate 21-B in U.S. Geological Survey. Professional paper 106. 1918. #1:/Professional paper 106-Wisconsin/awc00477 ID. Alden, W.C. 477 Form a panorama of lower narrows of Baraboo River, from the south. Sauk County, Wisconsin. July 23, 1910. Plate 13 in U.S. Geological Survey. Professional paper 106. 1918. #1:/Professional paper 106-Wisconsin/awc00478 ID. Alden, W.C. 478 Form a panorama of lower narrows of Baraboo River, from the south. Sauk County, Wisconsin. July 23, 1910. Plate 13 in U.S. Geological Survey. Professional paper 106. 1918. #1:/Glacier National Park/awc00506 ID. Alden, W.C. 506 Glacier National Park, Montana. Contorted Appekunny Argillite in the west slope of mountain near Firebrand Pass. July 10, 1911. #1:/Glacier National Park/awc00508 ID. Alden, W.C. 508 Glacier National Park, Montana. The Squaw, a mass of Precambrian rock which slid down on the slope of Cretaceous shales at 6,700 feet altitude. July 11, 1911. #1:/Glacier National Park/awc00509 ID. Alden, W.C. 509 Glacier National Park, Montana. Bearhead Mountain and cirque at the head of Midvale Creek, viewed from the north slope of Squaw Mountain. July 11, 1911. #1:/Glacier National Park/awc00511 ID. Alden, W.C. 511 Glacier National Park, Montana. Mount Helen in the middle. Two Medicine Lake, Big Horn Basin, Flinsch Peak in the background. July 12, 1911. #1:/Montana-Professional paper 174/awc00517 ID. Alden, W.C. 517 Moraines of Two Medicine Glacier, Blackfeet Indian Reservation: 7 miles southwest of Browning, showing numerous small lakes. Sec. 28, T. 32 N., R. 12 W. Glacier County, Montana. July 20, 1911. Plate 42-A, U.S. Geological Survey Professional paper 174. 1932. #1:/Glacier National Park/awc00523 ID. Alden, W.C. 523 Glacier National Park, Montana. Spot Mountain and the head of Lake Creek valley. Looking west along a lateral moraine of Lake Creek Glacier in the foreground on a ridge of Cretaceous shale. Red Mountain in the background. July 22, 1911. #1:/Glacier National Park/awc00525 ID. Alden, W.C. 525 Glacier National Park, Montana. Mount Thompson in the right background and Mount Stimson in the left background, viewed from Cut Bank Pass. July 25, 1911. #1:/Glacier National Park/awc00531 ID. Alden, W.C. 531 Glacier National Park, Montana. Flinsch Peak and the Continental Divide, viewed from the top of Mount Morgan. July 25, 1911. #1:/Glacier National Park/awc00538 ID. Alden, W.C. 538 Glacier National Park, Montana. Moraines of Mount James Glacier. July 26, 1911. #1:/Glacier National Park/awc00543 ID. Alden, W.C. 543 Glacier National Park, Montana. Looking west along the flat top of Swiftcurrent Ridge (pre-Wisconsin) till over Cretaceous shale. Appekunny Mountain (left, photo awc00544), Yellow Mountain (center), Chief Mountain (right). August 10, 1911. Photos awc00543 and awc00544 form a panorama. #1:/Glacier National Park/awc00544 ID. Alden, W.C. 544 Glacier National Park, Montana. Looking west along the flat top of Swiftcurrent Ridge (pre-Wisconsin) till over Cretaceous shale. Appekunny Mountain (left, photo awc00544), Yellow Mountain (center), Chief Mountain (right). August 10, 1911. Photos awc00543 and awc00544 form a panorama. #1:/Glacier National Park/awc00547 ID. Alden, W.C. 547 Glacier National Park, Montana. Cataract Creek Valley. Swiftcurrent Lake in the foreground. Grinnell Mountain on the right. Grinnell Glacier and Mount Gould in the background. August 12, 1911. #1:/Glacier National Park/awc00549 ID. Alden, W.C. 549 Glacier National Park, Montana. Iceberg Lake and Glacier. August 13, 1911. Photos awc00549 and awc00550 form a panorama. #1:/Glacier National Park/awc00550 ID. Alden, W.C. 550 Glacier National Park, Montana. Iceberg Lake and Glacier. August 13, 1911. Photos awc00549 and awc00550 form a panorama. #1:/Glacier National Park/awc00551 ID. Alden, W.C. 551 Glacier National Park, Montana. Front of glacier at Iceberg Lake, showing crevasses. August 13, 1911. #1:/Glacier National Park/awc00552 ID. Alden, W.C. 552 Glacier National Park, Montana. Crevasses in glacier at Iceberg Lake. August 13, 1911. #1:/Glacier National Park/awc00553 ID. Alden, W.C. 553 Glacier National Park, Montana. Iceberg Lake and mountains, viewed from glacier. August 13, 1911. #1:/Glacier National Park/awc00554 ID. Alden, W.C. 554 Glacier National Park, Montana. Swiftcurrent Valley, viewed from the pass. Grinnell Mountain on the right. August 15, 1911. #1:/Glacier National Park/awc00559 ID. Alden, W.C. 559 Glacier National Park, Montana. Glacier at Ahern Pass, showing a trail cut across the ice at the head of Belly River. August 19, 1911. #1:/Glacier National Park/awc00560 ID. Alden, W.C. 560 Glacier National Park, Montana. North wall (2,100 feet high) of the cirque below Ahern Pass at the head of Belly River. Glacier on top and small glacier at base with "snow plow" moraine. August 19, 1911. #1:/Glacier National Park/awc00565 ID. Alden, W.C. 565 Glacier National Park, Montana. Northeast across Chaney Glacier and moraines down-valley of the middle fork of the Belly River and Glenns Lakes. August 23, 1911. #1:/Glacier National Park/awc00566 ID. Alden, W.C. 566 Glacier National Park, Montana. West across Chaney Glacier. Mount Cleveland in the background. 10,438 feet altitude. August 23, 1911. #1:/Glacier National Park/awc00567 ID. Alden, W.C. 567 Glacier National Park, Montana. Glacier in a cirque southeast of Chaney. August 23, 1911. #1:/Glacier National Park/awc00573 ID. Alden, W.C. 573 Glacier National Park, Montana, and Waterton Lakes National Park, Alberta, Canada. Mountain front a little north of the Canadian line. Abrupt change from the plains in the Belly River valley. The peak in the center is at the extreme north end of the Lewis Range. The great fault cuts this range at the level of the plain. September 8, 1911. Plate 7-B, U.S. Geological Survey Bulletin 600. Photos awc00573, awc00574, awc00575 form a panorama. #1:/Glacier National Park/awc00574 ID. Alden, W.C. 574 Glacier National Park, Montana, and Waterton Lakes National Park, Alberta, Canada. Mountain front a little north of the Canadian line. Abrupt change from the plains in the Belly River valley. The peak in the center is at the extreme north end of the Lewis Range. The great fault cuts this range at the level of the plain. September 8, 1911. Plate 7-B, U.S. Geological Survey Bulletin 600. Photos awc00573, awc00574, awc00575 form a panorama. #1:/Glacier National Park/awc00575 ID. Alden, W.C. 575 Glacier National Park, Montana, and Waterton Lakes National Park, Alberta, Canada. Mountain front a little north of the Canadian line. Abrupt change from the plains in the Belly River valley. The peak in the center is at the extreme north end of the Lewis Range. The great fault cuts this range at the level of the plain. September 8, 1911. Plate 7-B, U.S. Geological Survey Bulletin 600. Photos awc00573, awc00574, awc00575 form a panorama. #1:/Glacier National Park/awc00578 ID. Alden, W.C. 578 Glacier National Park, Montana. Waterton Lake and mountains. 1911. #1:/Glacier National Park/awc00587 ID. Alden, W.C. 587 Glacier National Park, Montana. Mountains south of Brown Pass, viewed from the head of Bowman Lake. September 24, 1911. #1:/Glacier National Park/awc00673 ID. Alden, W.C. 673 Glacier National Park, Montana. Upper Trout Lake (Arrow Lake?) and Camas Creek valley. July 17, 1913. #1:/Glacier National Park/awc00674 ID. Alden, W.C. 674 Glacier National Park, Montana. Heavens Peak and the north slope of McPartland Mountain. July 17, 1913. #1:/Glacier National Park/awc00681 ID. Alden, W.C. 681 Glacier National Park, Montana. North along the crest of the Livingston Range. Glacier on Longfellow Peak in the left foreground. July 19, 1913. #1:/Glacier National Park/awc00685 ID. Alden, W.C. 685 Glacier National Park, Montana. Survey party at Sunday dinner at Trout Lake: M.R. Campbell (with necktie) seated on the left and W.C. Alden on the right. July 20, 1913. #1:/Glacier National Park/awc00686 ID. Alden, W.C. 686 Glacier National Park, Montana. Cirque scallops in the east slope of Heavens Peak. July 21, 1913. #1:/Glacier National Park/awc00687 ID. Alden, W.C. 687 Glacier National Park, Montana. Exposure on North Fork Flathead River, three- quarters of a mile below the mouth of Quartz Creek, showing glacial till, gravel, Tertiary sandstone. July 28, 1913. #1:/Glacier National Park/awc00694 ID. Alden, W.C. 694 Glacier National Park, Montana. Boulder Glacier, viewed from a mountain north of Brown Pass. August 4, 1913. #1:/Glacier National Park/awc00697 ID. Alden, W.C. 697 Glacier National Park, Montana. Boulder Glacier and the cirque wall at the head of Bowman Valley, viewed from the east wall of the cirque above Hole-in- the-Wall Falls. Boulder Glacier with Kintla Peak towering back of it on the extreme left (photo awc00699). Boundary Mountain in the center (photo awc00698). Great cirque wall above North Lake on the right (photo awc00697). August 4, 1913. Plate 12-B, U.S. Geological Survey Bulletin 600. Photos awc00697, awc00698, awc00699 form a panorama. #1:/Glacier National Park/awc00698 ID. Alden, W.C. 698 Glacier National Park, Montana. Boulder Glacier and the cirque wall at the head of Bowman Valley, viewed from the east wall of the cirque above Hole-in- the-Wall Falls. Boulder Glacier with Kintla Peak towering back of it on the extreme left (photo awc00699). Boundary Mountain in the center (photo awc00698). Great cirque wall above North Lake on the right (photo awc00697). August 4, 1913. Plate 12-B, U.S. Geological Survey Bulletin 600. Photos awc00697, awc00698, awc00699 form a panorama. #1:/Glacier National Park/awc00699 ID. Alden, W.C. 699 Glacier National Park, Montana. Boulder Glacier and the cirque wall at the head of Bowman Valley, viewed from the east wall of the cirque above Hole-in- the-Wall Falls. Boulder Glacier with Kintla Peak towering back of it on the extreme left (photo awc00699). Boundary Mountain in the center (photo awc00698). Great cirque wall above North Lake on the right (photo awc00697). August 4, 1913. Plate 12-B, U.S. Geological Survey Bulletin 600. Photos awc00697, awc00698, awc00699 form a panorama. #1:/Glacier National Park/awc00700 ID. Alden, W.C. 700 Glacier National Park, Montana. Stream on floor of the cirque at the head of Bowman Creek flowing into the crevice from which it issues some distance to the west and some hundreds of feet below at Hole-in-the-Wall. August 5, 1913. #1:/Glacier National Park/awc00701 ID. Alden, W.C. 701 Glacier National Park, Montana. Boulder Glacier, viewed from the lava bed, looking west. Small boulder moraine. The second lava bed is near the upper margin of the ice on the left. August 5, 1913. #1:/Glacier National Park/awc00702 ID. Alden, W.C. 702 Glacier National Park, Montana. Glaciated surface of the lava bed in front of Boulder Glacier. August 5, 1913. #1:/Glacier National Park/awc00704 ID. Alden, W.C. 704 Glacier National Park, Montana, and Waterton Lakes National Park, Alberta, Canada. North from Boulder Glacier through a lava-floored gap to the mountains north of the international boundary near the head of Kintla Creek. August 5, 1913. #1:/Glacier National Park/awc00705 ID. Alden, W.C. 705 Glacier National Park, Montana. Kintla Peak and Agassiz Glacier, viewed from a point 1 mile north of Pocket Lake. The narrow tongue of the glacier is cascading and much crevassed. There is a fine terminal moraine a short distance in front of the ice margin of the tongue and along the margin to the right. The peak is of Kintla Argillite. August 5, 1913. #1:/Glacier National Park/awc00710 ID. Alden, W.C. 710 Glacier National Park, Montana. Sperry Glacier, viewed from Little Matterhorn. August 15, 1913. Photos awc00710, awc00711, awc00712 form a panorama. #1:/Glacier National Park/awc00711 ID. Alden, W.C. 711 Glacier National Park, Montana. Sperry Glacier, viewed from Little Matterhorn. August 15, 1913. Photos awc00710, awc00711, awc00712 form a panorama. #1:/Glacier National Park/awc00712 ID. Alden, W.C. 712 Glacier National Park, Montana. Sperry Glacier, viewed from Little Matterhorn. August 15, 1913. Photos awc00710, awc00711, awc00712 form a panorama. #1:/Glacier National Park/awc00713 ID. Alden, W.C. 713 Glacier National Park, Montana. Glaciated groove in red Grinnell Argillite in front of Sperry Glacier. August 15, 1913. #1:/Glacier National Park/awc00714 ID. Alden, W.C. 714 Glacier National Park, Montana. Folds in interbedded red and white quartzite and red argillite (Grinnell) near the front of Sperry Glacier. August 15, 1913. #1:/Montana-Professional paper 231/awc00718 ID. Alden, W.C. 718 Front of ice on terminal moraine of Sperry Glacier; when seen in 1927 and 1936 the ice front had receded some distance from this moraine. Glacier National Park. Montana. August 16, 1913. Figure 41, in U.S.Geological Survey Professional Paper 231. 1953. #1:/Glacier National Park/awc00719 ID. Alden, W.C. 719 Glacier National Park, Montana. Lateral moraine of Sperry Glacier passing salient of the cliff on the east side of the glacier, showing 150+ feet thickness and stratification of ice. August 16, 1913. #1:/Glacier National Park/awc00724 ID. Alden, W.C. 724 Glacier National Park, Montana. North across the western part of Blackfoot Glacier toward Mount Jackson, showing crevasses. August 19, 1913. Photos awc00724 and awc00725 form a panorama. #1:/Glacier National Park/awc00725 ID. Alden, W.C. 725 Glacier National Park, Montana. North across the western part of Blackfoot Glacier toward Mount Jackson, showing crevasses. August 19, 1913. Photos awc00724 and awc00725 form a panorama. #1:/Glacier National Park/awc00727 ID. Alden, W.C. 727 Glacier National Park, Montana. One of the lobes of Harrison Glacier, viewed from the Continental Divide southeast of Mount Jackson. August 20, 1913. Plate 9-A, U.S. Geological Survey Bulletin 600. #1:/Glacier National Park/awc00730 ID. Alden, W.C. 730 Glacier National Park, Montana. Southwest to Blackfoot Mountain across the southeast part of Blackfoot Glacier, showing ice cliff over rock cliff, cascades, and crevassing. August 21, 1913. Photos awc00730 and awc00731 form a panorama. #1:/Glacier National Park/awc00731 ID. Alden, W.C. 731 Glacier National Park, Montana. Southwest to Blackfoot Mountain across the southeast part of Blackfoot Glacier, showing ice cliff over rock cliff, cascades, and crevassing. August 21, 1913. Photos awc00730 and awc00731 form a panorama. #1:/Glacier National Park/awc00732 ID. Alden, W.C. 732 Glacier National Park, Montana. Northeast down Saint Mary Valley, viewed from Gunsight Pass, showing Gunsight Lake. Citadel Mountain on the right. Going-to-the-Sun Mountain in the background. August 22, 1913. #1:/Glacier National Park/awc00733 ID. Alden, W.C. 733 Glacier National Park, Montana. Southwest down Lincoln Creek valley, viewed from Gunsight Pass, showing Lake Ellen Wilson. August 22, 1913. #1:/Glacier National Park/awc00734 ID. Alden, W.C. 734 Glacier National Park, Montana. Head of the middle fork of the Belly River (Mokowanis River), Sue Lake and small glacier (photo awc00734), Shepard Glacier (photo awc00735), cirques and peaks northwest of Shepard Glacier. September 6, 1913. Photos awc00734, awc00735, awc00736 form a panorama. #1:/Glacier National Park/awc00735 ID. Alden, W.C. 735 Glacier National Park, Montana. Head of the middle fork of the Belly River (Mokowanis River), Sue Lake and small glacier (photo awc00734), Shepard Glacier (photo awc00735), cirques and peaks northwest of Shepard Glacier. September 6, 1913. Photos awc00734, awc00735, awc00736 form a panorama. #1:/Glacier National Park/awc00736 ID. Alden, W.C. 736 Glacier National Park, Montana. Head of the middle fork of the Belly River (Mokowanis River), Sue Lake and small glacier (photo awc00734), Shepard Glacier (photo awc00735), cirques and peaks northwest of Shepard Glacier. September 6, 1913. Photos awc00734, awc00735, awc00736 form a panorama. #1:/Glacier National Park/awc00737 ID. Alden, W.C. 737 Glacier National Park, Montana. Down the middle fork of the Belly River (Mokowanis River), viewed from moraine of Shepard Glacier. Glenns Lake and the ridge in the background are a remnant of the high level plains capped with pre- Wisconsin drift. September 6, 1913. #1:/Glacier National Park/awc00738 ID. Alden, W.C. 738 Glacier National Park, Montana. Northwest from Sue Lake, showing Cathedral Peak and the col at the head of the cirque with Porcupine Ridge in the background. September 6, 1913. #1:/Glacier National Park/awc00745 ID. Alden, W.C. 745 Glacier National Park, Montana. Geologist sounding moulins in Chaney Glacier. Photo by C.S. Corbett, 1913. #1:/Glacier National Park/awc00746 ID. Alden, W.C. 746 Glacier National Park, Montana. Rainbow Glacier and Peak, viewed from the summit southeast of Mount Carter. Photo by C.S. Corbett, 1913. #1:/Iowa-Folio 200/awc00841 ID. Alden, W.C. 841 Section of glacial deposit in cut on Chicago, Milwaukee & St. Paul railway near Delmar Junction, about 15 miles southwest of Galena; labeled from top to bottom: Post-Illinoian loess; Kansan till; Altoonian sand and gravel; pre-Kansan till; pre-Kansan sand, gravel and silt. NE-1/4 sec. 8, T. 83 N., R.4 E. Clinton County, Iowa. October 10, 1914. Plate 2 in U.S. Geological Survey. Folio 200. 1916. #1:/Illinois-Folio 81/awc00866 ID. Alden, W.C. 866 Quarry one mile west of Elmhurst where Devonian fossils were found. The small triangular mass in left center of the picture, to the left of the geologic hammer, is filled with Devonian fossils. It is inclosed in Niagara limestone 18 feet below the surface. DuPage County, Illinois. 1901. Figure 16 in U.S. Geological Survey. Folio 81. 1902. #1:/Greenland-Folio 81/awc00868 ID. Alden, W.C. 868 The extremity of the lower Blasé Dale Glacier of Disco Island; shows the accumulation of drift material beneath an existing glacier. Greenland. Figure 19 in U.S. Geological Survey. Folio 81. 1902. #1:/Greenland-Folio 81/awc00869 ID. Alden, W.C. 869 Rock surface a few rods from the terminal moraine of the lower Blasé Dale Glacier; showing the characteristic grooving and polishing of the surface due to glaciation. Greenland. Figure 20 in U.S. Geological Survey. Folio 81. 1902. #1:/United States-Professional paper 60/awc00870 ID. Alden, W.C. 870 Surface of dune, Dune Park, showing "resurrected forest" and destruction of the reforested growth by moving sand. Porter County, Indiana, circa 1897, plate 20-B in U.S. Geological Survey. Professional paper 60. 1908. Figure 27 in U.S. Geological Survey. Folio 81. 1902. #1:/North Dakota-Professional paper 174/awc00890 ID. Alden, W.C. 890 Terminal moraine of Keewatin ice sheet, later Wisconsin stage: Coteau du Missouri, Burke, County, North Dakota. July 7, 1916. Plate 51-A, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc00911 ID. Alden, W.C. 911 Glacial boulders: Boulder of red granite on upland 20 miles north of Malta. Phillips County, Montana, August 26, 1916. Plate 41-A, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc00912 ID. Alden, W.C. 912 Glacial boulders: Transported blocks of Paleozoic limestone on upland north of Nelson reservoir, 18 miles northeast of Malta. Phillips County, Montana, August 28, 1916. Plate 41-B, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc00913 ID. Alden, W.C. 913 Moraines of the Keewatin ice sheet, early Wisconsin Stage: Recessional moraine near Martin Lake, 25 miles north of Malta. Northwest along crest of moraine, the cabins are on the plain just south (outside) the moraine. Phillips County, Montana. August 29, 1916. Plate 38-B, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc00924 ID. Alden, W.C. 924 Twin Buttes, Fort Belknap Indian Reservation, 9 miles north of Hays, on the top 850 above the plain, are drift pebbles showing that the glacier overrode the buttes. T. 28 N., R. 24 E. Blaine County, Montana. September 14, 1916. Plate 36-A, U.S. Geological Survey Professional paper 174. 1932. #1:/Coastal Regions/awc00945 ID. Alden, W.C. 945 Coastal Regions. Hooked spit at the west end of East Beach on Long Island, New York, 1.5 miles northeast of Port Jefferson. Between this shore and the foreground shore is one of the outlets of Mt. Sanai Harbor. A strong current flows out to the left to Long Island Sound. October 17, 1917. #1:/Montana-Professional paper 174/awc00978 ID. Alden, W.C. 978 Yellowstone River; bluff south of Forsyth, this bluff of Lance sandstone and shale is capped with quartzite river gravel of the second terrace (no. 2 bench), 250 to 300 feet above the river. Rosebud County, Montana. June 3, 1920. Plate 27-A, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc00979 ID. Alden, W.C. 979 Yellowstone River; smooth, flat surface of the gravelly second terrace (no. 2 bench) 3 to 10 miles east of Forsyth, traversed by Yellowstone Trail; 200 feet or more above the river. Rosebud County, Montana. June 3, 1920. Plate 27-B, U.S. Geological Survey Professional paper 174. 1932. #1:/Canada-Professional paper 174/awc00992 ID. Alden, W.C. 992 Terminal moraine of Keewatin ice sheet, later Wisconsin stage: 26 miles north of Whitetail, Montana, west of Big Muddy lake, Willowbunch district, Saskatchewan, Canada. June 26, 1920. Plate 51-B, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc01004 ID. Alden, W.C. 1004 No.2 bench 17 miles northeast of Malta; near Lovejoy road, on west side of Milk River Valley. Shows Judith River sandstone underlain by Claggett shale and overlain by 10 feet of non-glacial quartzite gravel of No. 2 bench (Pleistocene), 350 to 400 feet above the river. Upon this gravel is 30 feet of till of the Keewatin ice sheet. Phillips County, Montana. July 17, 1920. Plate 22-A, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc01006 ID. Alden, W.C. 1006 Perched boulder on Snake Butte, 12 miles south of Harlem. Blaine County, Montana. July 20, 1920. Plate 39-A, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc01009 ID. Alden, W.C. 1009 Little Rock Mountains; north front of mountains east of Hayes post office, showing great wall of upturned Paleozoic limestone. The horizon of top of wall is correlative with Flaxville Plain (No. 1 trench). Remnant of No. 2 bench at left. Blaine County, Montana. July 20, 1920. Plate 6-A, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc01011 ID. Alden, W.C. 1011 Little Rock Mountains; looking west along the notched top of the great north wall of limestone, 600 to 700 feet above the plains at right. Blaine County, Montana. July 22, 1920. Plate 6-B, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc01014 ID. Alden, W.C. 1014 Little Rocky Mountains: Near St. Paul's Mission, across Peoples Creek (altitude 3,550 to 3,650 feet) showing No. 1 bench (3,950 to 4,300 feet) and No. 2 bench (3,700 to 3,800 feet), sloping northward from the mountains at the left. Blaine County, Montana. July 22, 1920. Plate 8-A, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc01015 ID. Alden, W.C. 1015 Little Rocky Mountains: Mission Gorge, south of St. Paul's, cut through the great limestone wall by Peoples Creek. Blaine County, Montana. July 22, 1920. Plate 9-A, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc01016 ID. Alden, W.C. 1016 Little Rocky Mountains: Flaxville plain or No. 1 bench west of St. Paul's Mission, graded to the top of the limestone wall and the general profile of the mountains at the left. Blaine County, Montana. July 23, 1920. Plate 8-B, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc01017 ID. Alden, W.C. 1017 Eagle Butte, Bearpaw Mountains, looking west along top of terminal moraine of the early Wisconsin stage of the Keewatin ice sheet. The ice front reached the foot of the north (right) slope of the butte. Blaine County, Montana. July 30, 1920. Plate 36-B, U.S. Geological Survey Professional paper 174. 1932. #1:/Canada-Professional paper 174/awc01025 ID. Alden, W.C. 1025 Water worn quartzite Pebbles in Oligocene (?) gravel, capping Cypress Hills. Alberta, Canada. August 4, 1920. Plate 3-B, U.S. Geological Survey Professional paper 174. 1932. #1:/Canada-Professional paper 174/awc01028 ID. Alden, W.C. 1028 Oligocene (?) conglomerate capping Cypress Hills. Alberta, Canada. August 5, 1920. Plate 3-A, U.S. Geological Survey Professional paper 174. 1932. #1:/Glacier National Park/awc01039 ID. Alden, W.C. 1039 Glacier National Park, Montana. Swiftcurrent Valley, viewed from the slope of Mount Henkel, showing Many Glacier Hotel at McDermott (Swiftcurrent) Lake. Mount Allen on the right. Point Mountain and Flattop Mountain in the background. August 24, 1920. #1:/Glacier National Park/awc01047 ID. Alden, W.C. 1047 Glacier National Park, Montana. Ice arch at front of Grinnell Glacier. August 30, 1920. #1:/Montana-Professional paper 174/awc01052 ID. Alden, W.C. 1052 Missouri River: Rainbow Falls and dam of Montana Power Co., 4 miles below Great Falls, Cascade County, Montana. September 11, 1920. Plate 32-A, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc01054 ID. Alden, W.C. 1054 Missouri River: Postglacial (or post-Iowan or post-Illinoian) gorge below Big Falls, 10 miles below Great Falls, inner gorge about 200 feet deep cut in Cretaceous shale and sandstone below the bottom of a broader valley 200 to 300 feet deep. Cascade County, Montana. September 13, 1920. Plate 31-B, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc01059 ID. Alden, W.C. 1059 Missouri River meandering on the plain a few miles below Cascade, there is probably considerable filling in the pre-glacial channel beneath the riverbed. Cascade County, Montana. September 18, 1920. Plate 31-A, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc01053 ID. Alden, W.C. 1053 Missouri River: Big Falls 10 miles below Great Falls and power house and dam of Montana Power Co., Cascade County, Montana. September 13, 1920. Plate 33-A, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc01055 ID. Alden, W.C. 1055 Missouri River: Shonkin Sag near Highwood a channel eroded by the Missouri River about the north base of the Highwood Mountains when temporarily diverted by the Keewatin ice sheet, now traversed by the Chicago, Milwaukee, St. Paul Railway. This part is 200 to 300 feet deep. Cascade Montana. September 16, 1920. Plate 30-A, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc01064 ID. Alden, W.C. 1064 Sun River Canyon: view northeast to the mouth of the canyon and over the top of the lower wall of limestone from the inside. At the Wisconsin stage of glaciation the ice filled the big notch and overtopped the limestone wall. The Bureau of Reclamation dam is in the gorge at the right. Lewis and Clark County, Montana. September 21, 1920. Plate 43-B, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc01068 ID. Alden, W.C. 1068 Sun River Canyon: mouth of the canyon from foothills several miles east, showing the notch cut nearly 1,000 feet deep through the lower limestone wall, probably in interglacial time. Lewis and Clark County, Montana. September 21, 1920. Plate 43-A, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc1069a ID. Alden, W.C. 1069a Sun River, at mouth of canyon: showing cross profile of ancient Pliocene or Pleistocene high-level valley 4 miles wide above the top of the 1,000-foot lower wall of limestone. Teton County, Wyoming. September 22, 1920. Plate 7-A, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc01070 ID. Alden, W.C. 1070 Blocks of Paleozoic limestone transported by Sun River Glacier, on the plain 8 miles east of the mouth of the Sun River Canyon; the blocks are 10 by 13 by 30 feet. Lewis and Clark County, Montana. September 22, 1920. Plate 44-B, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc01081 ID. Alden, W.C. 1081 South Moccasin Mountains: Remnant of highest (No.1) gravel capped (in foreground) on west flank of mountains. Fergus County, Montana. October 1, 1920. Plate 11-A, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc01085 ID. Alden, W.C. 1085 South Moccasin Mountains: North across the gravelly No. 2 bench southwest of Lewistown, Fergus County, Montana. October 4, 1920. Plate 11-B, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc01084 ID. Alden, W.C. 1084 Smoothly worn top of east front of Judith Mountains: mouth of Maiden Canyon in middle ground. Fergus County, Montana. October 2, 1920. Plate 12-A, U.S. Geological Survey Professional paper 174. 1932. #1:/Glacier National Park/awc01094 ID. Alden, W.C. 1094 Glacier National Park, Montana. Two Medicine Lake and Mount Rockwell, viewed from Chalets. July 6, 1921. #1:/Glacier National Park/awc01095 ID. Alden, W.C. 1095 Glacier National Park, Montana. Trick Falls (Running Eagle Falls) below Two Medicine Lake at high water. July 6, 1921. #1:/Glacier National Park/awc01096 ID. Alden, W.C. 1096 Glacier National Park, Montana. Glacier Park Lodge and mountains, viewed from Glacier Park Railway Station. July 6, 1921. #1:/Montana-Professional paper 174/awc01099 ID. Alden, W.C. 1099 Pre-Wisconsin drift of Rocky Mountain Glaciers: glacial drift, largely cemented to tillite. Exposed at west end of highest (No. 1) bench, north of Lower Two Medicine Lake, SW1/4, sec. 16, T. 32 N., R. 13 W. Glacier National Park. Montana July 6, 1921. Plate 16-A, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc01102 ID. Alden, W.C. 1102 Moraines of Two Medicine Glacier, Blackfeet Indian Reservation: 4 miles west of Browning, near Park to Park highway. Glacier County, Montana. July 7, 1921. Plate 42- B, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc01113 ID. Alden, W.C. 1113 Blocks of Paleozoic limestone transported by Sun River Glacier 4 miles northwest of Augusta, on moraine 15 miles southeast of the mouth of the Sun River Canyon; blocks are 15 to 20 feet long. Lewis and Clark County, Montana. July 23, 1921. Plate 44-C, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc01116 ID. Alden, W.C. 1116 Little Rocky Mountains: No. 2 bench heading at a great notch in the wall of upturned Paleozoic limestone. View south of Beaver Creek. The highest (No. 1) bench, corresponding to the Flaxville Plain, before its destruction headed at the top of the limestone wall, about 300 feet higher than No. 2 bench. Blaine County, Montana. July 24, 1921. Plate 23-A, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc01117 ID. Alden, W.C. 1117 Little Rocky Mountains: Beaver Creek Canyon as seen from No. 2 bench, 350 to 400 feet above the present stream. Blaine County, Montana. July 24, 1921. Plate 23-B, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc1125a ID. Alden, W.C. 1125a Little Rocky Mountains: Natural Bridge, west of Mission Gorge. Blaine County, Montana. July 30, 1921. Plate 9-B, U.S. Geological Survey Professional paper 174. 1932. #1:/Yellowstone National Park/awc01145 ID. Alden, W.C. 1145 Yellowstone National Park, Wyoming. Yellowstone Canyon (Pleistocene) below Tower Creek. View is north-northwest from a point near Tower Falls. Auto road is below the upper cliff of basalt at the left. Below the road are wooded, fallen masses of basalt. The cliff at the right exposes glacial drift, upper columnar basalt, Tower Creek Conglomerate (Pliocene?), lower columnar basalt wedging out at right, and early basic volcanic breccia (Miocene). #1:/Montana-Professional paper 174/awc01146 ID. Alden, W.C. 1146 Glaciated canyon of Big Timber Creek, Crazy Mountains. Sweet Grass County, Montana. August 31, 1921. Plate 45-A, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc01152 ID. Alden, W.C. 1152 Stillwater Canyon, Beartooth Mountains: near view of part of high level till; mountain top shrouded in mist. Park County, Montana. September 15, 1921. Plate 17-B, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc01157 ID. Alden, W.C. 1157 Highest (No. 1) bench and middle (No. 2) bench east of Rock Creek, near Red Lodge; two irrigation ditches run northward (to left) along the steep slope above the bottom of the valley. Carbon County, Montana. September 16, 1921. Plate 13-A, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc01156 ID. Alden, W.C. 1156 No. 2 bench (in foreground and middle ground) heading in mouth of Rock Creek Canyon (at right): Beartooth Mountains in background. Carbon County, Montana. September 16, 1921. Plate 13-B, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc01161 ID. Alden, W.C. 1161 Dissected No. 2 bench south of Roscoe, heading at Beartooth Mountains in background. Carbon County, Montana. September 20, 1921. Plate 12-C, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc01162 ID. Alden, W.C. 1162 East of Roscoe; showing smooth flat top of the highest (Flaxville or No. 1) gravelly bench: Beartooth Mountains in background. Carbon County, Montana. September 20, 1921. Plate 12-B, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc01164 ID. Alden, W.C. 1164 Pompeys Pillar, 30 miles northeast of Billings an erosion remnant of Lance sandstone in the valley. On the opposite side toward the river, Capt. William Clark, of the Lewis and Clark expedition, cut his name and the date July 25, 1806. Yellowstone County, Montana. September 28, 1921. Plate 26-A, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc01169 ID. Alden, W.C. 1169 Big Sheep Mountain northwest of Terry, illustrating destruction of high gravel-covered benches and development of lower benches by erosion: younger and lower gravelly bench being trenched by recent drainage. Prairie County, Montana. June 2, 1922. Plate 4-B, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc01171 ID. Alden, W.C. 1171 Big Sheep Mountain northwest of Terry, illustrating destruction of high gravel-covered benches and development of lower benches by erosion: Last stages of breaking down of high level plain by broadening of a lower plain and dissection of the divide. Cedar Creek valley. Prairie County, Montana. June 2, 1922. Plate 4-B, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc01178 ID. Alden, W.C. 1178 Illustrating destruction of high gravel covered terraces and benches and development of lower plains and gravelly benches by erosion. Gravel capped Lance sandstone at right: badlands on dissected sandstone and shale at left. South of Myers: on the Yellowstone River. Rosebud County, Montana. June 6, 1922. Plate 5-A, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc01179 ID. Alden, W.C. 1179 Bluff of Lance sandstone east of Custer, capped with quartzite stream gravel of the second terrace (no. 2 bench). The face of the cliff shows the effects of differential weathering of the friable sandstone. Yellowstone County, Montana. September 1921. Plate 26-B, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc01183 ID. Alden, W.C. 1183 Pleistocene conglomerate on Clark Fork of the Yellowstone River; capping a remnant of No. 2 bench 200 feet above the river, near the J.F. Allen ranch, 2 miles north of the Montana-Wyoming State line. Carbon County, Montana. June 10, 1922. Plate 22-B, U.S. Geological Survey Professional paper 174. 1932. #1:/Wyoming-Professional paper 174/awc01185 ID. Alden, W.C. 1185 On the Clark Fork of the Yellowstone River, coarse bouldery gravel (Pleistocene) capping a remnant of No. 2 bench northeast of Clark, 4 miles south of the Montana- Wyoming state line; Beartooth Plateau in background. Park County, Wyoming. June 10, 1922. Plate 49-A, U.S. Geological Survey Professional paper 174. 1932. #1:/Wyoming-Professional paper 174/awc01188 ID. Alden, W.C. 1188 Illustrating destruction of high gravel covered terraces and benches and development of lower plains and gravelly benches by erosion. Pebbles and boulders moving down eroded shale slope from remnant of a gravel capped terrace (No. 2 bench) at top of a hill northeast of Clark. Park County, Wyoming. June 10, 1922. Plate 5-B, U.S. Geological Survey Professional paper 174. 1932. #1:/Wyoming-Professional paper 174/awc01189 ID. Alden, W.C. 1189 On the Clark Fork of the Yellowstone River, bouldery top of terminal moraine of Clark Fork Glacier, mouth of Clark Fork Canyon in middle background, 2 miles distant; Bald Mountain at left. Park County, Wyoming. June 10, 1922. Plate 50-B, U.S. Geological Survey Professional paper 174. 1932. #1:/Wyoming-Professional paper 174/awc01190 ID. Alden, W.C. 1190 On the Clark Fork of the Yellowstone River, front of terminal moraine of Clark Fork Glacier, of Wisconsin stage, 4 miles west of Clark, showing granite boulders 5 to 15 feet in diameter. Park County, Wyoming. June 10, 1922. Plate 50-A, U.S. Geological Survey Professional paper 174. 1932. #1:/Wyoming-Professional paper 174/awc01193 ID. Alden, W.C. 1193 On the Clark Fork of the Yellowstone River, terminal moraine of Clark Fork Glacier of Wisconsin stage, as seen from High Butte on the north, 4 miles west of Clark. The moraine is in the right middle ground: The bordering bouldery plain at the left and in background. Park County, Wyoming. June 10, 1922. Plate 49-B, U.S. Geological Survey Professional paper 174. 1932. #1:/Wyoming-Professional paper 174/awc01198 ID. Alden, W.C. 1198 In Shoshone National Forest, 12 to 15 miles southwest of Clark Post Office, looking southward across valley of upper Clark Fork of the Yellowstone River into basins of Sunlight and Dead Indian Creeks. Volcanic peaks of Absaroka Mountains in background; shows broad Pleistocene valley eroded in the Paleozoic rocks and, sharply cut into the bottom of this valley, the narrow branching box canyons of a later (Pleistocene?) cycle of erosion, more than 1,000 feet in Archean granite and gneiss. The broad bench, or bottom of the ancient valley, is probably to be correlated with the highest (No. 1) bench on the plains to the east. Park County, Wyoming. June 12, 1922. Plate 13-C, U.S. Geological Survey Professional paper 174. 1932. #1:/Wyoming-Professional paper 174/awc01199 ID. Alden, W.C. 1199 In Shoshone National Forest, 12 to 15 miles southwest of Clark Post Office, looking southward across valley of upper Clark Fork of the Yellowstone River into basins of Sunlight and Dead Indian Creeks. Volcanic peaks of Absaroka Mountains in background; shows broad Pleistocene valley eroded in the Paleozoic rocks and, sharply cut into the bottom of this valley, the narrow branching box canyons of a later (Pleistocene?) cycle of erosion, more than 1,000 feet in Archean granite and gneiss. The broad bench, or bottom of the ancient valley, is probably to be correlated with the highest (No. 1) bench on the plains to the east. Park County, Wyoming. June 12, 1922. Plate 13-C, U.S. Geological Survey Professional paper 174. 1932. #1:/Wyoming-Professional paper 174/awc01200 ID. Alden, W.C. 1200 In Shoshone National Forest, 12 to 15 miles southwest of Clark Post Office, looking southward across valley of upper Clark Fork of the Yellowstone River into basins of Sunlight and Dead Indian Creeks. Volcanic peaks of Absaroka Mountains in background; shows broad Pleistocene valley eroded in the Paleozoic rocks and, sharply cut into the bottom of this valley, the narrow branching box canyons of a later (Pleistocene?) cycle of erosion, more than 1,000 feet in Archean granite and gneiss. The broad bench, or bottom of the ancient valley, is probably to be correlated with the highest (No. 1) bench on the plains to the east. Park County, Wyoming. June 12, 1922. Plate 13-C, U.S. Geological Survey Professional paper 174. 1932. #1:/Wyoming-Professional paper 174/awc01203 ID. Alden, W.C. 1203 Inner box canyon of Clark Fork of the Yellowstone River, cut in Pleistocene time about 1,300 feet in granite and gneiss below the upper wall of Paleozoic rocks. Park County, Wyoming. June 12, 1922. Plate 25-A, U.S. Geological Survey Professional paper 174. 1932. #1:/Wyoming-Professional paper 174/awc01206 ID. Alden, W.C. 1206 Mounted together; eastern edge of Beartooth Plateau, between Montana-Wyoming line and Clark Fork of the Yellowstone River, an old erosion surface, possibly Oligocene on Pre-Cambrian granite and gneiss 9,000 to 10,000 feet above sea level and 4,000 to 5,000 feet above the plains at the right. Park County, Wyoming. June 13, 1922. Plate 3-C, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc01218 ID. Alden, W.C. 1218 East Rosebud Canyon, Beartooth Mountains: Alluvial fan that forms the dam at the foot of East Rosebud Lake. Carbon County, Montana. June 20, 1922. Plate 48-B, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc01219 ID. Alden, W.C. 1219 East Rosebud Canyon, Beartooth Mountains: East Rosebud Lake and Mountains. Carbon County, Montana. June 20, 1922. Plate 48-A, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc01221 ID. Alden, W.C. 1221 Near Crazy Mountains, showing terminal moraine of glacier that occupied the valley of South Fork of Big Timber Creek: looking up North Fork of Swamp Creek, the moraine forms a dam 150 feet high completely blocking the valley in the middle ground. Sweet Grass County, Montana. June 22, 1922. Plate 46-A, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc01222 ID. Alden, W.C. 1222 Near Crazy Mountains, showing terminal moraine of glacier that occupied the valley of South Fork of Big Timber Creek: Top of the moraine; Swamp Creek Valley in middle ground at left; remnant of No. 1 bench in background. Sweet Grass County, Montana. June 22, 1922. Plate 46-B, U.S. Geological Survey Professional paper 174. 1932. #1:/Yellowstone National Park/awc01229 ID. Alden, W.C. 1229 Yellowstone National Park, Wyoming. Marble Terrace in the Mammoth Hot Springs area. Travertine now forming; color mostly gray to white, with yellowish and reddish-brown algae streaks down the front of the terrace. Capitol Hill is in the right middle. Mount Everts is in the right background. View is north down Gallatin Valley toward Gardiner and the Snowy Range beyond. June 25, 1922. #1:/Yellowstone National Park/awc01232 ID. Alden, W.C. 1232 Yellowstone National Park, Wyoming. Obsidian Cliff. Lower half columnar, upper half more massive and irregularly porous, with denser, black obsidian at its base. June 25, 1922. #1:/Yellowstone National Park/awc01241 ID. Alden, W.C. 1241 Yellowstone National Park, Wyoming. Glaciated ledge of volcanic breccia uncovered while grading the road on the north spur of Mount Washburn, 8.5 miles southwest of Tower Falls Junction. June 29, 1922. #1:/Yellowstone National Park/awc01242 ID. Alden, W.C. 1242 Yellowstone National Park, Wyoming. Glacial morainal(?) topography on Crescent Hill. Possibly some of the knolls are basalt; no drift. June 29, 1922. #1:/Yellowstone National Park/awc01247 ID. Alden, W.C. 1247 Yellowstone National Park, Wyoming. East across Yellowstone Canyon, north of Tower Creek. From the top down: glacial drift, latest basalt, Tower Conglomerate, earlier basalt, and volcanic breccia. July 12, 1922. #1:/Montana-Professional paper 174/awc01262 ID. Alden, W.C. 1262 Missouri River issuing from the north end of the Belt Mountains, about 10 miles above Cascade. Cascade County, Montana. July 26, 1922. Plate 30-B, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc01279 ID. Alden, W.C. 1279 Yellowstone River above Livingston: Southeast across Yellowstone valley to Emigrant Peak, showing the broad basalt capped bench. This is thinly covered with glacial drift, and below, at White Cliffs is exposed 80 feet of gravel unconformably overlying tilted and eroded cream colored Tertiary clay (Bozeman "lake beds"). Park County, Montana. June 25, 1923. Plate 24-B, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc01282 ID. Alden, W.C. 1282 Yellowstone River above Livingston: Up Big Creek 8 miles west of Emigrant Peak, showing the broad upper valley; probably equivalent to the No. 2 bench (early Pleistocene), in the bottom of which is cut a gorge several hundred feet deep. Park County, Montana. June 25, 1923. Plate 24-A, U.S. Geological Survey Professional paper 174. 1932. #1:/Yellowstone National Park/awc01285 ID. Alden, W.C. 1285 Yellowstone National Park, Wyoming. Mammoth Hot Springs, viewed from Capitol Hill. Terrace Mountain capped with travertine in the background. June 27, 1923. #1:/Yellowstone National Park/awc01288 ID. Alden, W.C. 1288 Yellowstone National Park, Wyoming. Great rockslide below Terrace Mountain. The road crosses the slide at the "hoodoos" which are great blocks of travertine. June 27, 1923. #1:/Yellowstone National Park/awc01291 ID. Alden, W.C. 1291 Yellowstone National Park, Wyoming. Lower Falls of the Yellowstone River, viewed from the foot of the trail below Canyon Camp. July 2, 1923. #1:/Wyoming-Professional paper 174/awc01371 ID. Alden, W.C. 1371 Big Horn Mountains, high level boulder deposit capping Moncrief Ridge, boulders mostly granite and deeply weathered. Sheridan County, Wyoming. July 14, 1924. Plate 19-B, U.S. Geological Survey Professional paper 174. 1932. #1:/Wyoming-Professional paper 174/awc01373 ID. Alden, W.C. 1373 Big Horn Mountains, bouldery crest of Moncrief Ridge, 13 miles south of Sheridan, near east front of mountains. Many of the boulders are 5 to 15 feet in diameter. Sheridan County, Wyoming. July 14, 1924. Plate 19-A, U.S. Geological Survey Professional paper 174. 1932. #1:/Wyoming-Professional paper 174/awc01374 ID. Alden, W.C. 1374 Big Horn Mountains, high level boulder deposit capping Bald Ridge, near east front of the mountains. Johnson County, Wyoming. July 15, 1924. Plate 19-B, U.S. Geological Survey Professional paper 174. 1932. #1:/Wyoming-Professional paper 174/awc01375 ID. Alden, W.C. 1375 Big Horn Mountains, granite boulder on top of Bald Ridge, west of Buffalo; boulder is 20 feet long. Johnson County, Wyoming. July 15, 1924. Plate 19-B, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc01385 ID. Alden, W.C. 1385 Moraines of east Rosebud Glacier south of Roscoe: East Rosebud Canyon, Beartooth Mountains. Lateral moraine on edge of No. 2 bench in left foreground. Carbon County, Montana. July 19, 1924. Plate 47-A, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc01386 ID. Alden, W.C. 1386 Moraines of east Rosebud Glacier south of Roscoe: older lateral moraine (Illinoian or Iowan?) on No. 2 bench (at right) and younger lateral moraine (Wisconsin) descending to valley bottom (in left middle ground). Carbon County, Montana. July 21, 1924. Plate 47-B, U.S. Geological Survey Professional paper 174. 1932. #1:/Montana-Professional paper 174/awc01387 ID. Alden, W.C. 1387 Pre-Wisconsin drift of Rocky Mountain Glaciers: bouldery deposit on highest (No. 1) bench east of Roscoe. Carbon County, Montana. July 21, 1924. Plate 16-B, U.S. Geological Survey Professional paper 174. 1932. #1:/Gros Ventre Landslide, Wyoming, June 23, 1925/awc01620 ID. Alden, W.C. 1620 Gros Ventre Landslide, Wyoming, June 23, 1925. Gros Ventre landslide scar at the end of the north spur of Sheep Mountain in the Gros Ventre Range. September 18, 1925. #1:/Gros Ventre Landslide, Wyoming, June 23, 1925/awc01621 ID. Alden, W.C. 1621 Gros Ventre Landslide, Wyoming, June 23, 1925. Gros Ventre landslide dam, 225 feet high, and lake, 4 miles long, formed by the landslide. Outflow seeps through the dam. The slide came from the mountain slope on the right, out of view. Red Hills Sandstone and Shale in the background. September 19, 1925. #1:/Gros Ventre Landslide, Wyoming, June 23, 1925/awc01623 ID. Alden, W.C. 1623 Gros Ventre Landslide, Wyoming, June 23, 1925. South across the upper (north) end of the dam and the foot of the new 4-mile lake. Lower part of the slide above the lake in the background. Huff's ranch house floating on the far side of the lake. September 19, 1925. #1:/Gros Ventre Landslide, Wyoming, June 23, 1925/awc01625 ID. Alden, W.C. 1625 Gros Ventre Landslide, Wyoming, June 23, 1925. Across the foot of the new lake to Gros Ventre landslide scar. Lower part of the slide in the background. Slumped east face of the inner side of the dam in the right foreground. September 18, 1925. #1:/Gros Ventre Landslide, Wyoming, June 23, 1925/awc01626 ID. Alden, W.C. 1626 Gros Ventre Landslide, Wyoming, June 23, 1925. South across Gros Ventre Valley. The scar and the lower part of the slide of debris are above the foot of the lake at the south end of the dam. September 18, 1925. #1:/Colorado- Professional paper 185/awc01658 ID. Alden, W.C. 1658 Southward from Diamond Peak, showing the nearly flat top of Cold Spring Mountain, a remnant of the Gilbert Peak surface; eastern portion of the Uinta Range in the background and the Browns Park formation in the valley of Talamantes Creek in the foreground. Moffat County, Colorado. July 3, 1926. Plate 36-A, U.S.Geological Survey Professional Paper 185. 1936. #1:/Gros Ventre Landslide, Wyoming, June 23, 1925/awc01756 ID. Alden, W.C. 1756 Gros Ventre Landslide, Wyoming, June 23, 1925. Looking west up across upper part of the slide to head of the scarp. Lincoln County, Wyoming. September 23, 1926. #1:/Gros Ventre Landslide, Wyoming, June 23, 1925/awc01757 ID. Alden, W.C. 1757 Gros Ventre Landslide, Wyoming, June 23, 1925. Looking from below up to head of the scarp above and to the left of Photo No. awc01756. Line of trees stand on top of a great down-slid and lodged mass (8800+- A.T.) Slope of old scars in woods at left is 30 to 40 degrees. (T. 42 north, R. 114 west) Lincoln County, Wyoming. September 23, 1926. #1:/Gros Ventre Landslide, Wyoming, June 23, 1925/awc01758 ID. Alden, W.C. 1758 Gros Ventre Landslide, Wyoming, June 23, 1925. Looking from below up to head (highest part) of the scarp (9000+- A.T. bar.) (shown in Photo No. awc01757, upper left, 2100+- feet above valley bottom (T. 42 north, R. 114 west) Lincoln County, Wyoming. September 23, 1926. #1:/Gros Ventre Landslide, Wyoming, June 23, 1925/awc01759 ID. Alden, W.C. 1759 Gros Ventre Landslide, Wyoming, June 23, 1925. View from top of scarp (2100+- feet above valley bottom), looking down path of slide onto top of dam at foot of lake. High part of the dump is piled against red sandstone (Jura-Trieas) cliff (right back) above the new road, 400 feet above the stream bed. (T. 42 degrees north, R. 114 degress west). Lincoln County, Wyoming. September 25, 1926. #1:/Montana-Professional paper 231/awc01824 ID. Alden, W.C. 1824 Tertiary "lake beds" in river bluff northeast of Florence in the Bitterroot Valley, the deposits contain silicified wood (Miocene?) and are overlain by glacial Lake Missoula sediments (Pleistocene). Ravalli County, Montana. July 30, 1927. Figure 3, in U.S.Geological Survey Professional Paper 231. 1953. #1:/Glacier National Park/awc01834 ID. Alden, W.C. 1834 Glacier National Park, Montana. Sperry Glacier, showing ledges projecting through the ice and east wall of the cirque (photo awc01836), ice shrunken back from the inner terminal moraine (photo awc01834), and the older partly overgrown outer moraine (photo awc01835). 1927. Photos awc01834, awc01835, awc01836 form a panorama. #1:/Glacier National Park/awc01835 ID. Alden, W.C. 1835 Glacier National Park, Montana. Sperry Glacier, showing ledges projecting through the ice and east wall of the cirque (photo awc01836), ice shrunken back from the inner terminal moraine (photo awc01834), and the older partly overgrown outer moraine (photo awc01835). 1927. Photos awc01834, awc01835, awc01836 form a panorama. #1:/Glacier National Park/awc01836 ID. Alden, W.C. 1836 Glacier National Park, Montana. Sperry Glacier, showing ledges projecting through the ice and east wall of the cirque (photo awc01836), ice shrunken back from the inner terminal moraine (photo awc01834), and the older partly overgrown outer moraine (photo awc01835). 1927. Photos awc01834, awc01835, awc01836 form a panorama. #1:/Glacier National Park/awc01838 ID. Alden, W.C. 1838 Glacier National Park, Montana. Crumpled Grinnell Argillite at the back of Sperry Glacier. August 9, 1927. #1:/Glacier National Park/awc01839 ID. Alden, W.C. 1839 Glacier National Park, Montana. Glacial quarry in the cirque at the head of Sprague Creek near Sperry Glacier, showing effects of ice plucking from jointed rock ledges. August 9, 1927. Figure 28, U.S. Geological Survey Professional Paper 231. #1:/Montana-Professional paper 231/awc01840 ID. Alden, W.C. 1840 Longitudinal profile of drumlin in NW ¼ sec. 10 T. 28 N., R. 22 W.; four miles southwest of Kalispell, view looking east. Flathead County, Montana. August 15, 1927. Figure 26, in U.S.Geological Survey Professional Paper 231. 1953. #1:/Montana-Professional paper 231/awc01854 ID. Alden, W.C. 1854 Gulch fill or gravel bar west of Perma; adjacent slopes are largely bare rock. Sanders County, Montana. August 20, 1927. Figure 34, in U.S.Geological Survey Professional Paper 231. 1953. #1:/Montana-Professional paper 231/awc01925 ID. Alden, W.C. 1925 Stream cut rock terrace in Thompson River canyon showing the beveled edges of upturned strata 100 ft above the Pleistocene gravel terrace in the foreground. Sanders County, Montana. July 9, 1928. Figure 12, in U.S.Geological Survey Professional Paper 231. 1953. #1:/Montana-Professional paper 231/awc01931 ID. Alden, W.C. 1931 Composite of photos 1931 and 1932: Glaciolacustrine terrace on Vermilion River in the Cabinet Mountains east of Trout Creek, Cataract Creek cascades over rock ledges at the right. Lincoln County, Montana. July 11, 1928. Figure 36, in U.S.Geological Survey Professional Paper 231. 1953. #1:/Montana-Professional paper 231/awc01932 ID. Alden, W.C. 1932 Composite of photos 1931 and 1932: Glaciolacustrine terrace on Vermilion River in the Cabinet Mountains east of Trout Creek, Cataract Creek cascades over rock ledges at the right. Lincoln County, Montana. July 11, 1928. Figure 36, in U.S.Geological Survey Professional Paper 231. 1953. #1:/Montana-Professional paper 231/awc01998 ID. Alden, W.C. 1998 Granite Park in Glacier National Park. View north from Logan Pass to Granite Park (middle), an erosion remnant of a Pliocene (?) or early Pleistocene benchland; Haystack Butte and the Garden Wall (Continental Divide) at the right. Montana. September 8, 1928. Figure 7, in U.S.Geological Survey Professional Paper 231. 1953. #1:/Glacier National Park/awc02001 ID. Alden, W.C. 2001 Glacier National Park, Montana. Looking east over Hanging Gardens to the head of Saint Mary Lake. Moraine of Clements Mountain in the foreground. Piegan Mountain and Logan Pass on the left. September 3, 1928. #1:/Glacier National Park/awc02002 ID. Alden, W.C. 2002 Glacier National Park, Montana. Looking north from moraine, showing shrunken conditions of the glacier and extent of bare glaciated rock inside the inner moraine. Clements Mountain Glacier on the left. Mount Oberlin in the background. September 3, 1928. #1:/Glacier National Park/awc02003 ID. Alden, W.C. 2003 Glacier National Park, Montana. Mount Clements Glacier near Logan Pass. View is southwest, showing shrunken condition of the glacier and extent of bare glaciated rock inside the inner moraine (middle) between snow banks. September 8, 1928. #1:/Glacier National Park/awc02008 ID. Alden, W.C. 2008 Glacier National Park, Montana. Fossil algae in Siyeh Limestone in etched vertical joint face on the new auto road (Going-to-the Sun) below Granite Park. Projecting blasted ledge at the lower left. September 8, 1928. #1:/Montana-Professional paper 231/awc02011 ID. Alden, W.C. 2011 Shore lines of glacial Lake Missoula on Mount Jumbo at the mouth of Hell Gate Canyon, Missoula, with the remnant of a rock terrace at the foot of the slope. Missoula County, Montana. September 15, 1928. Figure 32, in U.S.Geological Survey Professional Paper 231. 1953. #1:/Glacier National Park/awc02130 ID. Alden, W.C. 2130 Glacier National Park, Montana.W.C. Alden and U.S. government truck at the United States-Canadian boundary post on the North Fork Flathead River. July 24, 1930. #1:/Montana-Professional paper 231/awc02140 ID. Alden, W.C. 2140 Composite of photos 2140 and 2143: Drumlin south of Libby: Longitudinal section showing the northern half of the drumlin with glacial 30 to 100 feet thick. The till thins northward (to left) and is underlain and overlain by stratified stream gravel; the bluff face is marked by buttresses of Recent erosion. Lincoln County, Montana. August 8, 1930. Figure 30, in U.S.Geological Survey Professional Paper 231. 1953. #1:/Montana-Professional paper 231/awc02143 ID. Alden, W.C. 2143 Composite of photos 2140 and 2143: Drumlin south of Libby: Longitudinal section showing the northern half of the drumlin with glacial 30 to 100 feet thick. The till thins northward (to left) and is underlain and overlain by stratified stream gravel; the bluff face is marked by buttresses of Recent erosion. Lincoln County, Montana. August 8, 1930. Figure 30, in U.S.Geological Survey Professional Paper 231. 1953. #1:/Montana-Professional paper 231/awc02148 ID. Alden, W.C. 2148 Big Draw, an abandoned outlet (Tertiary?) of Flathead basin now blocked by a terminal moraine (not in photo) west of the Big Arm of Flathead Lake. A filling of outwash gravel extends westward from the moraine to the valley of Sullivan Creek (foreground) where there is a whitish silt deposit of glacial Lake Missoula. Lake shore lines are well marked on the grassy hill slopes for hundreds of feet above the bottom land. View east from the hill north of Niarada. Flathead County, Montana. August 26, 1930. Figure 23, in U.S.Geological Survey Professional Paper 231. 1953. #1:/Montana-Professional paper 231/awc02150 ID. Alden, W.C. 2150 Terminal moraine of the Big Arm sub lobe of the Flathead glacier; view east from bordering outwash gravel plain in the Big Draw. Flathead County, Montana. August 26, 1930. Figure 23, in U.S.Geological Survey Professional Paper 231. 1953. #1:/Montana-Professional paper 231/awc02151 ID. Alden, W.C. 2151 Terminal moraine of the Big Arm sub lobe of the Flathead glacier; view east from bordering outwash gravel plain in the Big Draw. Flathead County, Montana. August 26, 1930. Figure 23, in U.S.Geological Survey Professional Paper 231. 1953. #1:/Montana-Professional paper 231/awc02193 ID. Alden, W.C. 2193 Glaciolacustrine silt overlying till deposited in the Rocky Mountain Trench in front of the retreating margin of Flathead (or East Kootenai) glacial lobe. The exposure is in a road cut northwest of Stryker near Murphy Lake. Lincoln County, Montana. August 3, 1931. Figure 27, in U.S.Geological Survey Professional Paper 231. 1953. #1:/Montana-Professional paper 231/awc02196 ID. Alden, W.C. 2196 Glaciated gorge of South Crow Creek in the Mission Range. Lake County, Montana. 1931. Figure 19, in U.S.Geological Survey Professional Paper 231. 1953. #1:/Montana-Professional paper 231/awc02205 ID. Alden, W.C. 2205 The very bouldery terminal moraine at the canyon mouth of Sawtooth Creek, viewed from the outwash terrace to the east. Ravalli County, Montana. 1931. Figure 18, in U.S.Geological Survey Professional Paper 231. 1953. #1:/Montana-Professional paper 231/awc02211 ID. Alden, W.C. 2211 Terminal moraine of Wise River glacier fifteen miles south of Wise River; this moraine blocked the gorge until the river cut through the drift-covered rock spur at right. Beaverhead County, Montana. 1931. Figure 37, in U.S.Geological Survey Professional Paper 231. 1953. #1:/Montana-Professional paper 231/awc02212 ID. Alden, W.C. 2212 Terminal moraine of Wise River glacier fifteen miles south of Wise River; this moraine blocked the gorge until the river cut through the drift-covered rock spur at right. Beaverhead County, Montana. 1931. Figure 37, in U.S.Geological Survey Professional Paper 231. 1953. #1:/Montana-Professional paper 231/awc02213 ID. Alden, W.C. 2213 Terminal moraine of Wise River glacier fifteen miles south of Wise River; this moraine blocked the gorge until the river cut through the drift-covered rock spur at right. Beaverhead County, Montana. 1931. Figure 37, in U.S.Geological Survey Professional Paper 231. 1953. #1:/Glacier National Park/awc02243 ID. Alden, W.C. 2243 Glacier National Park, Montana. Trick Falls (Running Eagle Falls) and Altyn Limestone between Middle and Lower Two Medicine Lakes. Later in the summer, all the water is discharged through the tunnel. July 3, 1936. #1:/Glacier National Park/awc02245 ID. Alden, W.C. 2245 Glacier National Park, Montana. Wynn Mountain south of Sherburne Lake, viewed from the wood hills of Cretaceous rock east of Canyon Creek. The mountain is composed of Altyn Limestone overlain by Appekunny Argillite. Plane of thrust faulting within the limestone. Lewis overthrust plane covered near top of talus. July 9, 1936. #1:/Glacier National Park/awc02247 ID. Alden, W.C. 2247 Glacier National Park, Montana. Swiftcurrent Valley, northwest across Lake Sherburne to Altyn Peak, viewed from the foothills of Wynn Mountain. Hanging Valley of Appekunny Creek and Appekunny Mountain on the right. Plane of Lewis overthrust under talus above the wooded slope on Cretaceous shale. July 9, 1936. #1:/Glacier National Park/awc02248 ID. Alden, W.C. 2248 Glacier National Park, Montana. Allen Mountain and Hanging Valley of Allen Creek, viewed from the foothills of Wynn Mountain. July 9, 1936. #1:/Glacier National Park/awc02249 ID. Alden, W.C. 2249 Glacier National Park, Montana. Iceberg Lake full of floating ice. The glacier on the far side of the lake is nearly melted away. July 13, 1936. #1:/Glacier National Park/awc02250 ID. Alden, W.C. 2250 Glacier National Park. Iceberg Lake full of floating ice, but the glacier back of the lake is nearly if not quite melted away. View southwest across lake. Glacier National Park, Flathead County, Montana. July 13, 1936. #1:/Glacier National Park/awc02251 ID. Alden, W.C. 2251 Glacier National Park. Iceberg Lake full of floating ice, but the glacier back of the lake is nearly if not quite melted away. View south 18 degrees east. across head of lake (from prospect hole on talus at dike on northwest shore). Moraine in right foreground. Compare Photo Nos. awc00551 (1911) and awc01044 (1920). Glacier National Park, Flathead County, Montana. July 13, 1936. #1:/Glacier National Park/awc02252 ID. Alden, W.C. 2252 Glacier National Park. Iceberg Lake full of floating ice,. but the glaier back of the lake is nearly if not quite melted away. View from moraine south 30 degree east across head of lake at approximate former position of 100 ft. front cliff of glacier ice. Debris on ice is probably part of that shown in Photo Nos. awc00551 (1911) and awc01041 (1920). Glacier National Park, Flathead County, Montana. July 13, 1936. #1:/Glacier National Park/awc02253 ID. Alden, W.C. 2253 Glacier National Park. Iceberg Lake. View south 20 degrees east across lake outlet showing thrust fault on 26 degree slope in Siyeh limestone in east wall of cirque. Glacier National Park, Flathead County, Montana. July 13, 1936. #1:/Glacier National Park/awc02254 ID. Alden, W.C. 2254 Glacier National Park, Montana. South up Waterton Lake, viewed from the shore south of the Prince of Wales Hotel. July 14, 1936. #1:/Glacier National Park/awc02255 ID. Alden, W.C. 2255 Glacier National Park, Montana. Grinnell Glacier, viewed from the trail above Grinnell Lake, to Gem Glacier on Garden Wall at upper left. Considerable melting of Grinnell Glacier back of moraine. July 16, 1936. #1:/Glacier National Park/awc02256 ID. Alden, W.C. 2256 Glacier National Park, Montana. Southeast across Grinnell Glacier, viewed from the big boulders on the north moraine. Recession of ice front from the east moraine on the left. July 16, 1936. #1:/Glacier National Park/awc02260 ID. Alden, W.C. 2260 Glacier National Park, Montana. Northwest across Grinnell Glacier to the notch at the dike in Garden Wall. Recession from moraines. July 16, 1936. #1:/Glacier National Park/awc02261 ID. Alden, W.C. 2261 Glacier National Park, Montana. Glaciated boulder of Siyeh Limestone about 10 feet in diameter on the north moraine near the front of Grinnell Glacier. Vertical markings due to "molar tooth" structure in the limestone. July 16, 1936. #1:/Glacier National Park/awc02262 ID. Alden, W.C. 2262 Glacier National Park, Montana. Kintla Lake, looking northeast from the foot of the lake. Boundary Mountains on the left. Parke Peak in right background. July 23, 1936. #1:/Glacier National Park/awc02263 ID. Alden, W.C. 2263 Glacier National Park, Montana. Northeast across the western part of Sperry Glacier exposing much crumpled red and white quartzite ledges formerly covered by the glacier. Ice ridge on the left is a remnant of the western frontal part of the glacier. The front of the eastern part is melted back from the inner moraine. July 25, 1936. #1:/Glacier National Park/awc02264 ID. Alden, W.C. 2264 Glacier National Park, Montana. Sperry Glacier. Ledge of interbedded red argillite and white quartzite, showing details of crumpling and incipient thrust faults. July 25, 1936. #1:/Glacier National Park/awc02265 ID. Alden, W.C. 2265 Glacier National Park. Sperry Glacier. View northeast along front of glacier from ice south of Matterhorn Peak. Shows rock ledges and ponds between the receding ice front and the inner moraine. Compare Photo Nos. awc00716, awc00718 (1913), awc01834 and awc01837 (1927). Glacier National Park, Flathead County, Montana. July 25, 1936. #1:/Glacier National Park/awc02266 ID. Alden, W.C. 2266 Glacier National Park. Sperry Glacier. View northwest along front of glacier from ice south of Matterhorn Peak. Shows rock ledges and ponds between the receding ice front and the inner moraine. Compare Photo Nos. awc007l6, awc00718 (1913), awc01834 and awc01837. Glacier National Park, Flathead County, Montana. July 25, 1936. #1:/Glacier National Park/awc02267 ID. Alden, W.C. 2267 Glacier National Park, Montana. Superglacial water stream plunging down a moulin. July 25, 1936. #1:/Glacier National Park/awc02268 ID. Alden, W.C. 2268 Glacier National Park, Montana. South over the upper part of Sperry Glacier, looking over moulins, dirt bands, and crevasses to the bergschrund at the Continental Divide. July 25, 1936. #1:/Montana-Professional paper 231/awc02269 ID. Alden, W.C. 2269 Moat and cliff of stratified ice, about 150 feet high, at the northeast margin of Sperry Glacier; rock cliff at the left. Glacier National Park, Montana. July 25, 1936. Figure 42, in U.S.Geological Survey Professional Paper 231. 1953. #1:/Glacier National Park/awc02270 ID. Alden, W.C. 2270 Glacier National Park. Sperry Glacier. View south up the steep front of the main glacier, showing stratified ice and dirt bands. Glacier National Park, Flathead County, Montana. July 25, 1936. #1:/Montana-Professional paper 231/awc02271 ID. Alden, W.C. 2271 Abrupt west face and glacially scoured, fault-lined scarp at base of Swan Range, south of Red Rock Canyon. Flathead County, Montana. July 29, 1936. Figure 8, in U.S.Geological Survey Professional Paper 231. 1953. #1:/Montana-Professional paper 231/awc02272 ID. Alden, W.C. 2272 Glacial till in the gorge of Flathead River; Pre-Wisconsin (?) till, about 175 feet thick, is exposed below the Polson dam site and outside of the Polson moraine of Wisconsin age. It is eroded in buttresses, overlain by whitish silt of glacial Lake Missoula, and underlain by lower till. View east, 5 miles below Polson with the Mission Range in the background. Lake County, Montana. August 1, 1936. Figure 16, in U.S.Geological Survey Professional Paper 231. 1953. #1:/Montana-Professional paper 231/awc02273 ID. Alden, W.C. 2273 Laminated silt of glacial Lake Missoula, overlying (pre Wisconsin ?) glacial till exposed at the Crow Creek dam near the inner part of the Mission moraine southwest of Ronan. Lake County, Montana. August 3, 1936. Figure 15, in U.S.Geological Survey Professional Paper 231. 1953. #1:/Montana-Professional paper 231/awc02281 ID. Alden, W.C. 2281 Recent fault scarp across the alluvial terrace at the mouth of Sheep canyon, northwest of Lima; the trees are on the down faulted terrace below the scarp; the man (left) is on the terrace above the scarp. : Beaverhead County, Montana. August 21, 1936. Figure 40, in U.S.Geological Survey Professional Paper 231. 1953. #1:/Montana-Professional paper 231/awc02283 ID. Alden, W.C. 2283 Recent fault scarp across an alluvial piedmont slope northwest of Lima: Beaverhead County, Montana. August 21, 1936. Figure 39, in U.S.Geological Survey Professional Paper 231. 1953. #1:/Montana-Professional paper 231/awc02287 ID. Alden, W.C. 2287 Glaciated gorge of Canyon Creek northwest of Melrose; showing the smooth Vipond Park upland (left background) and the north lateral moraine of Canyon Creek glacier (left foreground) that extends eastward down slope below the upland. Notch in rock spur (right middle ground) is a wind gap cut by a glacial marginal stream. Silver Bow County, Montana. August 27, 1936. Figure 38, in U.S.Geological Survey Professional Paper 231. 1953. #1:/Montana-Professional paper 231/awc02288 ID. Alden, W.C. 2288 Glaciated gorge of Canyon Creek northwest of Melrose; showing the smooth Vipond Park upland (left background) and the north lateral moraine of Canyon Creek glacier (left foreground) that extends eastward down slope below the upland. Notch in rock spur (right middle ground) is a wind gap cut by a glacial marginal stream. Silver Bow County, Montana. August 27, 1936. Figure 38, in U.S.Geological Survey Professional Paper 231. 1953. #1:/Montana-Professional paper 231/awc02314 ID. Alden, W.C. 2314 Gulch fill or gravel bar at Paradise. Sanders County, Montana. July 7, 1937. Figure 35, in U.S.Geological Survey Professional Paper 231. 1953. #1:/Montana-Professional paper 231/awc02315 ID. Alden, W.C. 2315 Granite boulders of disintegration in the Bitterroot Range at Lolo Hot Springs southwest of Missoula on the Lewis and Clark Trail. Missoula County, Montana. July 1937. Figure 6, in U.S.Geological Survey Professional Paper 231. 1953. #1:/Montana-Professional paper 231/awc02341 ID. Alden, W.C. 2341 Tertiary "lake beds" (Oligocene ?) east of Dell near Cook's ranch on Sage Creek, Beaverhead Valley. Clay interbedded with sandstone layers tilted, beveled, and overlain by coarse quartzite gravel (early Pleistocene). Beaverhead County, Montana. August 23, 1937. Figure 2, in U.S.Geological Survey Professional Paper 231. 1953. #1:/Idaho-Professional paper 231/awc02344 ID. Alden, W.C. 2344 Travertine cliff southwest of Lima, Montana, at the edge of the Tertiary (?) upland between the heads of Sheep Creek in Montana and Lodgepole Creek in Idaho. Clark County, Idaho. August 25, 1937. Figure 5, in U.S.Geological Survey Professional Paper 231. 1953. #1:/Montana-Professional paper 231/awc02357 ID. Alden, W.C. 2357 Boyer Creek bench (Pliocene? or Pleistocene) and terrace of glacial Lake Missoula; faint shore lines of the lake are visible on the grassy slope between the top of the gravel covered bench an the terrace on lacustrine silt below. View east in valley of Clark Fork. Sanders County, Montana. July 26, 1938. Figure 17, in U.S.Geological Survey Professional Paper 231. 1953. #1:/Montana-Professional paper 231/awc02371 ID. Alden, W.C. 2371 Drift-covered, benched spur on Papoose Creek, an erosion remnant of an old piedmont terrace (Pliocene? or early Pleistocene) as seen from the broad terrace of early to middle Pleistocene age. In the gap between the spur and the mountain front at right are moraines of Papoose Creek glacier (Wisconsin stage) crossed by the scarp of a Recent fault. The benched top of the spur is more than 1,000 ft. above the Madison River, about 2 miles away. Madison County, Montana. August 20, 1938. Figure 4, in U.S.Geological Survey Professional Paper 231. 1953. #1:/Montana-Professional paper 231/awc02387 ID. Alden, W.C. 2387 Lateral moraine of Lost Horse Creek glacier; the morainal drift appears to overlie a benched spur or erosion remnant of a piedmont terrace of Pliocene (?) or early Pleistocene age. Glaciated gorge of Horse Creek cuts the fault line scarp at the east front of the Bitterroot Range (right), view south over inner moraines. Montana. Pre-1940. Figure 11, in U.S.Geological Survey Professional Paper 231. 1953. #1:/Montana-Professional paper 231/awc02388 ID. Alden, W.C. 2388 Glacial feature of the Mission Range: a drift covered spur (Pliocene or early Pleistocene?) at the south side of the canyon mouth of Mission Creek. Lake County, Montana. Pre-1940. Figure 20-A, in U.S.Geological Survey Professional Paper 231. 1953. #1:/Montana-Professional paper 231/awc02389 ID. Alden, W.C. 2389 Glacial feature of the Mission Range: drift covered, benched spur east of the north lateral of Mission Creek glacier. Lake County, Montana. Pre-1940. Figure 20-B, in U.S.Geological Survey Professional Paper 231. 1953. #1:/Montana-Professional paper 231/awc02390 ID. Alden, W.C. 2390 Glacial feature of the Mission Range: terminal and lateral moraines of glaciated canyon of Mission Creek east of Saint Ignatius. Lake County, Montana. Pre-1940. Figure 20-C, in U.S.Geological Survey Professional Paper 231. 1953. #1:/Montana-Professional paper 231/awc02392 ID. Alden, W.C. 2392 Postglacial gorge of the Flathead River below Polson: vertical photograph of the gorge before construction of the dam showing the river cutting in the rock at the dam site near the sharp bend and the rapids above the bend at the left. Between these bends no rock is exposed suggesting the presence of a preglacial valley filled with several hundred feet of drift. Photograph courtesy of F.F. Henshaw, Federal Power Commission. Lake County, Montana. Pre-1940. Figure 21-B, in U.S.Geological Survey Professional Paper 231. 1953. #1:/Idaho-Professional paper 231/awc02393 ID. Alden, W.C. 2393 Vertical face of glaciated bluff near Clark Fork; nearly horizontal striations cross the edges of eastward-dipping strata obliquely. The glacial lobe that striated this bluff was crowding eastward (left to right) from Pend Oreille Lake basin into the gorge of the Clark Fork and formed an ice dam impounding glacial Lake Missoula. Bonner County, Idaho. Pre-1940. Figure 31, in U.S.Geological Survey Professional Paper 231. 1953. #1:/Glacier National Park/awc02394 ID. Alden, W.C. 2394 Glacier National Park, Montana. Glacial stairway at the head of Sprague Creek. The cliff below the lower lake is 500 feet high; similar cliff below bench on which is Sperry Chalet (lower right). Edwards Mountain is on the left. Gunsight Mountain is on the right. The outcrop of the diorite sill shows as a dark band in the cliff beyond Sperry Glacier in the background. Photo by U.S. Army Air Corps, circa 1940. Figure 43, U.S. Geological Survey Professional Paper 231. #1:/Montana-Professional paper 231/awc02395 ID. Alden, W.C. 2395 High peaks northeast of Saint Ignatius: and long sloping spur grading down to the drift- covered rock spur north of the canyon of Ashley Creek (at right). Lake County, Montana. Pre-1940. Figure 9, in U.S.Geological Survey Professional Paper 231. 1953. #1:/Montana-Professional paper 231/awc02396 ID. Alden, W.C. 2396 Glaciated gorge of Ashley Creek (left) northeast of Saint Ignatius in the Flathead basin; Long, sloping spur at the right graded down to drift-covered rock spur at north side of the canyon of Mission Creek. Lake County, Montana. Pre-1940. Figure 10, in U.S.Geological Survey Professional Paper 231. 1953. #1:/California-Folio 163/arn00016 ID. Arnold, R. 16 Natural bridge in Monterey shale, which is overlain by 15 feet of Quaternary deposits forming the surface of the lowest marine terrace, on the coast, 3 miles west of Santa Cruz. Santa Cruz County, California. 1905. Figure 6 in U.S. Geological Survey. Folio 163. 1909. #1:/California-Folio 163/arn00106 ID. Arnold, R. 106 Unconformity between the upturned Chico formation on the right and the Butano sandstone (Oligocene) on the left, on the coast one-half mile south of the mouth of Pescadero Creek, San Mateo County, California. May 28, 1905. Figure 4 in U.S. Geological Survey. Folio 163. 1909. #1:/California-Folio 163/arn00110 ID. Arnold, R. 110 Conglomerate of Chico formation on the coast 2.5 miles north of Pigeon Point, looking northwest. San Mateo County, California. May 28, 1905. Figure 4 in U.S. Geological Survey. Folio 163. 1909. #1:/California-Folio 163/arn00112 ID. Arnold, R. 112 Formation on the coast by Pigeon Point Light Station, looking northwest, showing conglomerate promontory. San Mateo County, California. May 30, 1905, 8am. #1:/California-Folio 163/arn00113 ID. Arnold, R. 113 Cliffs "drowned" by drifting sand, 1 to 2 miles east of Point Ano Nuevo, looking east. San Mateo County, California. May 30, 1905, 1pm. #1:/California-Folio 163/arn00114 ID. Arnold, R. 114 Fossiliferous Pleistocene resting on tilted Pliocene and Cretaceous (?) shales, 1-2 miles east of Point Ano Nuevo, looking north. San Mateo County, California. May 30, 1905, 1pm. #1:/California-Folio 163/arn00115 ID. Arnold, R. 115 Indian kitchen-midden in amphitheatre of drifing sand, 1 to 4 miles east of Point Ano Nuevo, looking east. San Mateo County, California. May 30, 1905, 3:30pm. #1:/California-Folio 163/arn00117 ID. Arnold, R. 117 Looking east from the top of the 40-foot marine terrace 1 mile east of Point Ano Nuevo, vertical bluff on the left shows truncated beds of Purisima formation overlain by Quaternary deposits, the top of which forms the surface of the terrace. Merced formation in the white bluffs on the right; white Miocene shales form the hills in the distance. San Mateo County, California. May 1905. Figure 7 in U.S. Geological Survey. Folio 163. 1909. #1:/Grand Canyon National Park/arn00168 ID. Arnold, R. 168 Grand Canyon National Park, Arizona. North from the rim of the Grand Canyon near the Grand View Hotel. August 28, 1905. #1:/Grand Canyon National Park/arn00169 ID. Arnold, R. 169 Grand Canyon National Park, Arizona. North from the rim of the Grand Canyon near the Grand View Hotel. August 28, 1905. #1:/Grand Canyon National Park/arn00180 ID. Arnold, R. 180 Grand Canyon National Park, Arizona. Upper Grand Canyon at big bend, viewed from near the Grand View Hotel. August 28, 1905. Photos arn00180 and arn00181 form a panorama. #1:/Grand Canyon National Park/arn00181 ID. Arnold, R. 181 Grand Canyon National Park, Arizona. Upper Grand Canyon at big bend, viewed from near the Grand View Hotel. August 28, 1905. Photos arn00180 and arn00181 form a panorama. #1:/Grand Canyon National Park/arn00182 ID. Arnold, R. 182 Grand Canyon National Park, Arizona. Up the Colorado River from the foot of Bright Angel Trail. August 29, 1905. #1:/Grand Canyon National Park/arn00183 ID. Arnold, R. 183 Grand Canyon National Park, Arizona. Water-worn limestone boulder in the bed of the Colorado River at the foot of Bright Angel Trail rests on schist and granite dike contact. August 29, 1905. #1:/Grand Canyon National Park/arn00184 ID. Arnold, R. 184 Grand Canyon National Park, Arizona. Rapids on the Colorado River, viewed from the foot of Bright Angel Trail. August 29, 1905. #1:/Grand Canyon National Park/arn00185 ID. Arnold, R. 185 Grand Canyon National Park, Arizona. Bright Angel Canyon, viewed from camp on Bright Angel Trail. August 29, 1905. #1:/Grand Canyon National Park/arn00186 ID. Arnold, R. 186 Grand Canyon National Park, Arizona. From O'Neil's Point on the south rim of the Grand Canyon, east of the El Tovar Hotel. August 30, 1905. #1:/Grand Canyon National Park/arn00191 ID. Arnold, R. 191 Grand Canyon National Park, Arizona. Bright Angel Canyon, viewed from O'Neil's Point, showing the south rim of the canyon in the foreground. August 30, 1905. #1:/Grand Canyon National Park/arn00192 ID. Arnold, R. 192 Grand Canyon National Park, Arizona. Vishnu Temple and the south rim of the Grand Canyon, viewed from O'Neil's Point. August 30, 1905. #1:/Grand Canyon National Park/arn00193 ID. Arnold, R. 193 Grand Canyon National Park, Arizona. Grand Canyon, viewed from in front of the El Tovar Hotel. August 30, 1905. Photos arn00193 and arn00194 form a panorama. #1:/Grand Canyon National Park/arn00194 ID. Arnold, R. 194 Grand Canyon National Park, Arizona. Grand Canyon, viewed from in front of the El Tovar Hotel. August 30, 1905. Photos arn00193 and arn00194 form a panorama. #1:/Grand Canyon National Park/arn00198 ID. Arnold, R. 198 Grand Canyon National Park, Arizona. 100 feet below the rim on Bright Angel Trail. View is north. August 30, 1905. #1:/Grand Canyon National Park/arn00199 ID. Arnold, R. 199 Grand Canyon National Park, Arizona. Pabirana, viewed from 100 feet below the rim on Bright Angel Trail. View is north. August 30, 1905. #1:/California/arn00208 ID. Arnold, R. 208 Front view of the ruins of San Diego Mission. San Diego County, California, September 15, 1905, 5pm. #1:/California-Bulletin 309/arn00220 ID. Arnold, R. 220 Whittier Oil field, productive well in vertical strata. Los Angeles County, California. 1905. Plate 13-B in U.S. Geological Survey. Bulletin 309. 1907. #1:/California-Bulletin 309/arn00221 ID. Arnold, R. 221 Characteristic pumping plant Whittier field, Los Angeles County, California. 1905. Plate 14-B in U.S. Geological Survey. Bulletin 309. 1907. #1:/California-Bulletin 309/arn00222 ID. Arnold, R. 222 Whittier Oil field, wells along property line of Central Oil company and Murphy Oil company. Looking east. Los Angeles County, California. 1905. Plate 13-A in U.S. Geological Survey. Bulletin 309. 1907. #1:/California-Bulletin 309/arn00223 ID. Arnold, R. 223 La Brea Canyon field, looking southeast. Orange County, California. 1905. Plate 14-A in U.S. Geological Survey. Bulletin 309. 1907. #1:/California-Bulletin 309/arn00228 ID. Arnold, R. 228 Nodular Miocene sandstone at Los Angeles, California. 1905. Plate 21-A in U.S. Geological Survey. Bulletin 309. 1907. #1:/California-Bulletin 309/arn00229 ID. Arnold, R. 229 Typical lower Miocene sandstone at Los Angeles, California. 1905. Plate 21-B in U.S. Geological Survey. Bulletin 309. 1907. #1:/California-Bulletin 309/arn00231 ID. Arnold, R. 231 Central Oil field looking east from near corner of First Street and Belmont Avenue, Los Angeles County, California. 1905. Plate 22-B in U.S. Geological Survey. Bulletin 309. 1907. #1:/California-Bulletin 309/arn00232 ID. Arnold, R. 232 Central Oil field looking east from near corner of First Street and Belmont Avenue, Los Angeles County, California. 1905. Plate 22-B in U.S. Geological Survey. Bulletin 309. 1907. #1:/California-Bulletin 309/arn00234 ID. Arnold, R. 234 Characteristic thin-bedded Pliocene sandstone, Los Angeles Oil Field, Los Angeles County, California. 1905. Plate 24-A in U.S. Geological Survey. Bulletin 309. 1907. #1:/California-Bulletin 309/arn00236 ID. Arnold, R. 236 Eastern Oil field, looking north from Baker Iron works, Los Angeles County, California. 1905. Plate 22-A in U.S. Geological Survey. Bulletin 309. 1907. #1:/California-Bulletin 309/arn00237 ID. Arnold, R. 237 Eastern Oil field, looking north from Baker Iron works, Los Angeles County, California. 1905. Plate 22-A in U.S. Geological Survey. Bulletin 309. 1907. #1:/California-Bulletin 309/arn00244 ID. Arnold, R. 244 Santa Paula Canyon from Santa Paula, Ventura County, California. 1905. Plate 7-A in U.S. Geological Survey. Bulletin 309. 1907. #1:/California-Bulletin 309/arn00245 ID. Arnold, R. 245 Santa Paula Canyon from Santa Paula, Ventura County, California. 1905. Plate 7-A in U.S. Geological Survey. Bulletin 309. 1907. #1:/California-Bulletin 309/arn00248 ID. Arnold, R. 248 The Great Topatopa anticline Sespe Oil field, from hill above Los Angeles wells. Ventura County, California. 1905. Plate 2-B in U.S. Geological Survey. Bulletin 309. 1907. #1:/California-Bulletin 309/arn00249 ID. Arnold, R. 249 The Great Topatopa anticline Sespe Oil field, from hill above Los Angeles wells. Ventura County, California. 1905. Plate 2-B in U.S. Geological Survey. Bulletin 309. 1907. #1:/California-Bulletin 309/arn00250 ID. Arnold, R. 250 The Great Topatopa anticline Sespe Oil field, from hill above Los Angeles wells. Ventura County, California. 1905. Plate 2-B in U.S. Geological Survey. Bulletin 309. 1907. #1:/California-Bulletin 309/arn00263 ID. Arnold, R. 263 Salt Lake field, looking north from near lagoon. Los Angeles County, California. 1905. Plate 23 in U.S. Geological Survey. Bulletin 309. 1907. #1:/California-Bulletin 309/arn00264 ID. Arnold, R. 264 Salt Lake field, looking north from near lagoon. Los Angeles County, California. 1905. Plate 23 in U.S. Geological Survey. Bulletin 309. 1907. #1:/California-Bulletin 309/arn00265 ID. Arnold, R. 265 Salt Lake field, looking north from near lagoon. Los Angeles County, California. 1905. Plate 23 in U.S. Geological Survey. Bulletin 309. 1907. #1:/California-Bulletin 309/arn00268 ID. Arnold, R. 268 Lagoon in Salt Lake field, showing floating oil and bubbling water to escaping gas. Los Angeles County, California. 1905. Plate 24-B in U.S. Geological Survey. Bulletin 309. 1907. #1:/California-Bulletin 309/arn00280 ID. Arnold, R. 280 Fortuna Wells, Hopper Canyon, Ventura County, California. 1905. Plate 8-B in U.S. Geological Survey. Bulletin 309. 1907. #1:/California-Bulletin 309/arn00281 ID. Arnold, R. 281 Pico anticline, Pico Canyon, Los Angeles County, California. 1905. Plate 9-B in U.S. Geological Survey. Bulletin 309. 1907. #1:/California-Bulletin 309/arn00285 ID. Arnold, R. 285 Overturn in Vaqueros formation, west side of Pico Canyon, Los Angeles County, California. 1905. Plate 9-A in U.S. Geological Survey. Bulletin 309. 1907. #1:/California-Bulletin 309/arn00287 ID. Arnold, R. 287 Elsmere ridge and oil wells near Newhall, Los Angeles County, California. 1905. Plate 7-B in U.S. Geological Survey. Bulletin 309. 1907. #1:/California-Bulletin 309/arn00288 ID. Arnold, R. 288 Elsmere ridge and oil wells near Newhall, Los Angeles County, California. 1905. Plate 7-B in U.S. Geological Survey. Bulletin 309. 1907. #1:/California/arn00357 ID. Arnold, R. 357 Photographer adjusting his camera: looking north over Antelope Valley, from ridge on Miller Brothers, (road) grade. Kern County, California. August 1, 1905. #1:/Grand Canyon National Park/arn00380 ID. Arnold, R. 380 Grand Canyon National Park, Arizona. Down into the Grand Canyon from Rowes Point. July 10, 1906. #1:/California-Professional paper 222/arn00394 ID. Arnold, R. 394 Sisquoc formation and Careaga sandstone: Thin-bedded impure diatomite in Sisquoc formation of Casmalia Hills. Santa Barbara County, California. July 19, 1906. Figure 6- A, in U.S.Geological Survey Professional Paper 222. 1950. #1:/California-Bulletin 322/arn00395 ID. Arnold, R. 395 Monocline in Monterey shale in Casmalia Hills, about 1.5 miles northwest of Casmalia, looking northwest. Santa Barbara County, California. July 20, 1906. Plate 9-A in U.S. Geological Survey. Bulletin 322. 1907. #1:/California-Bulletin 322/arn00396 ID. Arnold, R. 396 Monocline in Monterey shale in Casmalia Hills, about 1.5 miles northwest of Casmalia, looking northwest. Santa Barbara County, California. July 20, 1906. Plate 9-A in U.S. Geological Survey. Bulletin 322. 1907. #1:/California-Bulletin 322/arn00405 ID. Arnold, R. 405 Unconformity between tilted Monterey shale and horizontal Pleistocene sand and gravel, in railroad cut northeast of Casmalia. Santa Barbara County, California. July 26, 1906. Plate 6-A in U.S. Geological Survey. Bulletin 322. 1907. #1:/California-Professional paper 222/arn00411 ID. Arnold, R. 411 Careaga sandstone, Paso Robles formation and Orcutt sand: Orcutt sand and Paso Robles formation, railroad cut near Shuman, closer view of unconformity shown in Woodring 157. Santa Barbara County, California. August 8, 1906. Figure 7-D, in U.S.Geological Survey Professional Paper 222. 1950. #1:/California-Professional paper 222/arn00420 ID. Arnold, R. 420 Monterey shale and Sisquoc formation: Diatomaceous mudstone and underlying less diatomaceous clayey mudstone of Sisquoc formation on north slope of western Purisima Hills. The diatomaceous mudstone forms white outcrops. Santa Barbara County, California. August 9, 1906. Figure 5-C, in U.S.Geological Survey Professional Paper 222. 1950. #1:/California-Bulletin 322/arn00425 ID. Arnold, R. 425 Characteristic exposure of Fernando gravel, second ridge east of Figuero Creek, 7 miles northeast of Los Olivos. Santa Barbara County, California. August 28, 1906. Plate 6-A in U.S. Geological Survey. Bulletin 322. 1907. #1:/California-Bulletin 322/arn00428 ID. Arnold, R. 428 Sharp double fold in Monterey shale, looking east from point northwest of Zaca Lake; Zaca Peak in distance. Santa Barbara County, California. August 28, 1906. Plate 6-B in U.S. Geological Survey. Bulletin 322. 1907. #1:/California-Bulletin 322/arn00447 ID. Arnold, R. 447 Graciosa and Western Union companies' wells, south side of Santa Maria field; Mount Solomon in distance. Santa Barbara County, California. August 10, 1906. Plate 9-B in U.S. Geological Survey. Bulletin 322. 1907. #1:/California-Bulletin 322/arn00448 ID. Arnold, R. 448 Graciosa and Western Union companies' wells, south side of Santa Maria field; Mount Solomon in distance. Santa Barbara County, California. August 10, 1906. Plate 9-B in U.S. Geological Survey. Bulletin 322. 1907. #1:/California-Professional paper 222/arn00456 ID. Arnold, R. 456 Views in Purisima Hills and Solomon Hills: looking eastward on north slope of Purisima Hills between Canada Laguna Seca and Canada de Santa Ynez. Santa Barbara County, California. August 23, 1906. Figure 2-A, in U.S.Geological Survey Professional Paper 222. 1950. #1:/California-Bulletin 322/arn00466 ID. Arnold, R. 466 Alcatraz asphalt mine 3 miles east of Sisquoc, showing the horizontal Fernando brea deposits overlying the steeply tilted Monterey shale. Santa Barbara County, California. August 28, 1906. Plate 8-A in U.S. Geological Survey. Bulletin 322. 1907. #1:/California-Bulletin 322/arn00480 ID. Arnold, R. 480 Dark colored fossiliferous brea deposit overlying Monterey shale, Ridge at Folsom well No. 3; Pinal camp on left and Santa Maria Valley in distance, Looking north. Santa Barbara County, California. September 7, 1906. Plate 11-A in U.S. Geological Survey. Bulletin 322. 1907. #1:/California-Professional paper 222/arn00481 ID. Arnold, R. 481 Views in Purisima Hills and Solomon Hills: Mount Solomon as from northwest from road on top of Graciosa Ridge. Santa Barbara County, California. September 7, 1906. Figure 2-B, in U.S.Geological Survey Professional Paper 222. 1950. #1:/California-Bulletin 322/arn00485 ID. Arnold, R. 485 Saddle in Monterey, Fernando and Pleistocene beds: Graciosa Ridge at Hartnell well No. 1 near Orcutt; Pleistocene on left, Fernando (Pliocene) in upper right, Monterey (Miocene) in saddle, looking east. Santa Barbara County, California. September 7, 1906. Plate 11-B in U.S. Geological Survey. Bulletin 322. 1907. #1:/California-Bulletin 322/arn00487 ID. Arnold, R. 487 Characteristic exposure of volcanic ash near base of Monterey formation, at point where Cuyama River enters the Santa Maria Valley. Santa Barbara County, California. September 8, 1906. Plate 3-A in U.S. Geological Survey. Bulletin 322. 1907. #1:/California-Bulletin 322/arn00493 ID. Arnold, R. 493 Upturned and contorted semi-flinity Monterey shale, on Sisquoc River, 5 miles east of Sisquoc. Heavy oil is exude at a point immediately to the right of the man. Santa Barbara County, California. September 26, 1906. Plate 3-B in U.S. Geological Survey. Bulletin 322. 1907. #1:/California-Bulletin 322/arn00516 ID. Arnold, R. 516 Soft white diatomaceous shale, detail of weathering on Burton Mesa, east of Pine Canyon. Santa Barbara County, California. October 3, 1906. Plate 4-B in U.S. Geological Survey. Bulletin 322. 1907. #1:/California/arn00525 ID. Arnold, R. 525 Looking northwest at end of Summerland oil field, showing Pliocene beds below and horizontal Pleistocene beds above. Santa Barbara County, California. October 15, 1906. #1:/California-Bulletin 321/arn00527 ID. Arnold, R. 527 Pleistocene beds in railroad cut west of Summerland, looking north. Dark sandstone at base is heavily charged with asphaltum derived from overturned oil-bearing Fernando beds below. Santa Barbara County, California. October 15, 1906. Plate 2-B in U.S. Geological Survey. Bulletin 321. 1907. #1:/California-Bulletin 321/arn00528 ID. Arnold, R. 528 Unconformity near North Star wharf, looking west, Pleistocene deposits resting on nearly vertical oil-bearing Fernando sandstone and conglomerate. Santa Barbara County, California. October 16, 1906. Plate 4 in U.S. Geological Survey. Bulletin 321. 1907. #1:/California-Bulletin 321/arn00533 ID. Arnold, R. 533 A tar volcano in the Carpinteria Asphalt mine, showing how oil exudes from joint cracks in the upturned Monterey shale forming the floor of mine. Santa Barbara County, California. October 16, 1906. Plate 3-A in U.S. Geological Survey. Bulletin 321. 1907. #1:/California-Bulletin 321/arn00535 ID. Arnold, R. 535 Beach near Carpinteria Asphalt mine showing upturned and contorted Monterey shale. The exuding tar cements seaweed, pebbles and rocks into a firm conglomerate. Bluff in rear is composed of sands heavily impregnated with asphaltum. Santa Barbara County, California. October 16, 1906. Plate 3-A in U.S. Geological Survey. Bulletin 321. 1907. #1:/California/arn0631a ID. Arnold, R. 631a Extreme western end of Summerland oil field, and town from Treadwell wharf, possibly a panorama with Arnold, R. 632a Santa Barbara County, California. 1900. #1:/California-Bulletin 398/arn00632 ID. Arnold, R. 632 Overturned shales of Tejon formation in axis of Coalinga anticline, looking northwest across foothill, 8 miles north of Coalinga, note base of overlying Vaqueros on left; the vegetation following lines of bedding in the fold; Joaquin Ridge in distance, taken from Vaqueros contact on ridge shown in photo arn00633. Fresno, California. 1907. Plate 13- A in U.S. Geological Survey. Bulletin 398. 1910. #1:/California/arn0632a ID. Arnold, R. 632a Western end of Summerland oil field, and town from Treadwell wharf .Santa Barbara County, California. 1900. #1:/California-Bulletin 398/arn00633 ID. Arnold, R. 633 "Reef Beds" of Vaqueros sandstone overlying overturned shales of the Tejon formation, looking northwest across foothills 8 miles north of Coalinga. Fresno, California. 1907. Plate 7-A in U.S. Geological Survey. Bulletin 398. 1910. #1:/California/arn0633a ID. Arnold, R. 633a Closer in from, Treadwell wharf and central portion of Summerland oil field, Santa Ynez Mountains in distance. Santa Barbara County, California. 1900. #1:/California-Bulletin 398/arn00634 ID. Arnold, R. 634 Unconformity between Tejon formation and Vaqueros sandstone, the petroleum migrates from shales below and collects in sand and gravel above to form oil zone D. In canyon of Laval grade 8.5 miles north of Coalinga, Fresno, California. 1907. Plate 5-B in U.S. Geological Survey. Bulletin 398. 1910. #1:/California/arn0634a ID. Arnold, R. 634a Treadwell wharf and central portion of Summerland oil field, Santa Ynez Mountains in distance. Santa Barbara County, California. 1900. #1:/California-Bulletin 398/arn00635 ID. Arnold, R. 635 Arid foothill belt of Tertiary formations, looking northeast from Zapata creek, across Kreyenhagen Hills toward the valley. Fresno County, California. 1907. Plate 2-A in U.S. Geological Survey. Bulletin 398. 1910. #1:/California/arn0635a ID. Arnold, R. 635a Southern portion of Summerland oil field from middle of Treadwell (S.P. Co.) wharf. Santa Barbara County, California. 1900. #1:/California-Bulletin 398/arn00636 ID. Arnold, R. 636 Arid foothill belt of Tertiary formations, looking northeast from Zapata creek, across Kreyenhagen Hills toward the valley. Fresno County, California. 1907. Plate 2-A in U.S. Geological Survey. Bulletin 398. 1910. #1:/California-Bulletin 398/arn00637 ID. Arnold, R. 637 "Reef Beds" of Vaqueros sandstone forming scarp of Reef ridge, looking south across upper portion of Zapato creek. Fresno County, California. 1907. Plate 8 in U.S. Geological Survey. Bulletin 398. 1910. #1:/California-Bulletin 398/arn00638 ID. Arnold, R. 638 "Reef Beds" of Vaqueros sandstone forming scarp of Reef ridge, looking south across upper portion of Zapato creek. Fresno County, California. 1907. Plate 8 in U.S. Geological Survey. Bulletin 398. 1910. #1:/California/arn0638a ID. Arnold, R. 638a Looking southeast at Treadwell (S.P. Co.) wharf from terrace at Summerland. Santa Barbara County, California. 1900. #1:/California-Bulletin 398/arn00649 ID. Arnold, R. 649 Regularly dipping beds of Santa Margarita (?) and Jacalitos formations on northeast flank of Coalinga anticline in Eastside field. Looking north from ridge on which the Standard Oil company old camp is situated. Note steep slopes eroded in soft sedimentary beds, in topographic reflection of structure, and difficulties attendant upon operations. Fresno County, California. 1907. Plate 17 in U.S. Geological Survey. Bulletin 398. 1910. #1:/California-Bulletin 398/arn00650 ID. Arnold, R. 650 Regularly dipping beds of Santa Margarita (?) and Jacalitos formations on northeast flank of Coalinga anticline in Eastside field. Looking north from ridge on which the Standard Oil company old camp is situated. Note steep slopes eroded in soft sedimentary beds, in topographic reflection of structure, and difficulties attendant upon operations. Fresno County, California. 1907. Plate 17 in U.S. Geological Survey. Bulletin 398. 1910 #1:/California-Professional paper 116/arn00653 ID. Arnold, R. 653 Form a panorama of Midway Oil Field, looking northeastward from Twenty-five Hill across present site of Taft, Buena Vista Hills in middle distance and Elk Hills beyond. Kern County, California. 1907. Plate 2-A in U.S. Geological Survey. Professional paper 116. 1920. #1:/California-Professional paper 116/arn00654 ID. Arnold, R. 654 Form a panorama of Midway Oil Field, looking northeastward from Twenty-five Hill across present site of Taft, Buena Vista Hills in middle distance and Elk Hills beyond. Kern County, California. 1907. Plate 2-A in U.S. Geological Survey. Professional paper 116. 1920. #1:/California-Bulletin 398/arn00657 ID. Arnold, R. 657 Characteristic bluffs, with strike face and dip slope, formed by varicolored Miocene sandstone, shale, and conglomerate, looking northeast at outcrops of Big Blue, 11 miles northeast of Coalinga. Note local fault on the left. Fresno County, California. 1907. Plate 10 in U.S. Geological Survey. Bulletin 398. 1910. #1:/California-Bulletin 398/arn00658 ID. Arnold, R. 658 Characteristic bluffs, with strike face and dip slope, formed by varicolored Miocene sandstone, shale, and conglomerate, looking northeast at outcrops of Big Blue, 11 miles northeast of Coalinga. Note local fault on the left. Fresno County, California. 1907. Plate 10 in U.S. Geological Survey. Bulletin 398. 1910. #1:/California-Bulletin 398/arn00662 ID. Arnold, R. 662 Sandstone dikes in petroliferous shale of the Tejon formation, view 15 miles north of Coalinga, similar dikes are characteristic of this formation. Fresno County, California. 1907. Plate 6-A in U.S. Geological Survey. Bulletin 398. 1910. #1:/California-Bulletin 398/arn00691 ID. Arnold, R. 691 Arroyo cutting Pleistocene sand and clay that cover San Joaquin Valley, on plain east of Kettleman Hills south east Tulare Lake. Kings County, California. 1907. Plate 12-A in U.S. Geological Survey. Bulletin 398. 1910. #1:/California-Bulletin 398/arn00701 ID. Arnold, R. 701 Petroliferous shale and sandstone of Tejon formation broken by local fault, looking north in canyon of San Joaquin Valley mine, in NW ¼ sec. 26, T.20 S., R. 14 E. Fresno County, California. 1907. Plate 6-B in U.S. Geological Survey. Bulletin 398. 1910. #1:/California-Bulletin 398/arn00708 ID. Arnold, R. 708 Hard reddish-brown sandstone concretions weathering out of massive upper Cretaceous sandstone. on flank of Joaquin Ridge north of Los Gatos creek. 12:30 pm Fresno County, California. July 9, 1907. Plate 4-B in U.S. Geological Survey. Bulletin 398. #1:/California-Bulletin 398/arn00712 ID. Arnold, R. 712 Stream terraces along Zapato creek, the upper terrace is an important one throughout the hills. 1#1:30 am, Fresno County, California. August 23, 1907. Plate 4-A in U.S. Geological Survey. Bulletin 398. #1:/California-Bulletin 398/arn00719 ID. Arnold, R. 719 Monocline of Tertiary strata in Jacalitos Hills, looking north from Jacalitos creek, along the strike of the beds on the left, and across the strike on the right. 5:00 pm, Fresno County, California. August 14, 1907. Plate 2-A in U.S. Geological Survey. Bulletin 398. 1910. #1:/California-Bulletin 398/arn00720 ID. Arnold, R. 720 Monocline of Tertiary strata in Jacalitos Hills, looking north from Jacalitos creek, along the strike of the beds on the left, and across the strike on the right. 5:00 pm, Fresno County, California. August 14, 1907. Plate 2-A in U.S. Geological Survey. Bulletin 398. 1910. #1:/California-Bulletin 398/arn00721 ID. Arnold, R. 721 Monocline of Tertiary strata in Jacalitos Hills, looking north from Jacalitos creek, along the strike of the beds on the left, and across the strike on the right. 5:00 pm, Fresno County, California. August 14, 1907. Plate 2-A in U.S. Geological Survey. Bulletin 398. 1910. #1:/California-Professional paper 116/arn00753 ID. Arnold, R. 753 Sand made by well in Sunset field, Well no. 13 of Adeline Consolidated Oil Co., sand estimated to be about 110,000 cubic feet. Kern County, California. October 1908. Plate 45-C in U.S. Geological Survey. Professional paper 116. 1920. #1:/California-Professional paper 116/arn00756 ID. Arnold, R. 756 Form a panorama of Sunset Oil field, looking northeast, east and southeast from Occidental property 1 mile northwest of Maricopa. Kern County, California. October 1908. Plate 33-A in U.S. Geological Survey. Professional paper 116. 1920. #1:/California-Professional paper 116/arn00757 ID. Arnold, R. 757 Form a panorama of Sunset Oil field, looking northeast, east and southeast from Occidental property 1 mile northwest of Maricopa. Kern County, California. October 1908. Plate 33-A in U.S. Geological Survey. Professional paper 116. 1920. #1:/California-Professional paper 116/arn00758 ID. Arnold, R. 758 Form a panorama of Sunset Oil field, looking northeast, east and southeast from Occidental property 1 mile northwest of Maricopa. Kern County, California. October 1908. Plate 33-A in U.S. Geological Survey. Professional paper 116. 1920. #1:/California-Professional paper 116/arn00837 ID. Arnold, R. 837 Granite boulder in upper part of Maricopa shale west of Fellows; this boulder has weathered out of loss granitic material bedded with fine diatomaceous shale. Kern County, California. October 1908. Plate 6-B in U.S. Geological Survey. Professional paper 116. 1920. #1:/California-Bulletin 413/arn00846 ID. Arnold, R. 846 The gypsite workings in Sec. 7, T. 32 S., R. 22 E. on the Carrizo Plain; done to meet assessment requirements on oil land. San Luis Obispo County, California. 1906. Plate 4- A in U.S. Geological Survey. Bulletin 413. 1910. #1:/Max Ball Collection/bmw00017 ID. Ball, M.W. 17 Wasatch bad lands west of automobile road in sections 15 and 22, T. 15 N. R.92 W. Looking westward. Carbon County, Utah. cc 1900. #1:/Max Ball Collection/bmw00018 ID. Ball, M.W. 18 Wasatch bad lands west of automobile road in sections 15 and 22, T. 15 N. R.92 W. Looking westward. Carbon County, Utah. cc 1900. #1:/Max Ball Collection/bmw00103 ID. Ball, M.W. 103 Structure in basalt; south side of Sheep Mountain. SE SW 16-12-87. Carbon County, Utah. cc 1900. #1:/Max Ball Collection/bmw00104 ID. Ball, M.W. 104 Structure in basalt; southeast corner of Sheep Mountain. South center 16-12-87. Carbon County, Utah. cc 1900. #1:/Max Ball Collection/bmw00146 ID. Ball, M.W. 146 Cross bedding and thin bedded Mesaverde sandstone. Summit of escarpment north of Blake Creek. 19-33. Photo by C.L. Baker. Carbon County, Utah. cc 1900. #1:/Max Ball Collection/bmw00147 ID. Ball, M.W. 147 Wind pot-holes, Mesaverde sandstone. Summit of escarpment north of Blake Creek. 19-88. Photo by C.L. Baker. Carbon County, Utah. cc 1900. #1:/Max Ball Collection/bmw00150 ID. Ball, M.W. 150 Monuments of thin bedded Mesaverde sandstone. Summit of escarpment north of Blake Creek. 19-88. Photo by C.L. Baker. Carbon County, Utah. cc 1900. #1:/Max Ball Collection/bmw00151 ID. Ball, M.W. 151 Monuments of thin bedded Mesaverde sandstone. Summit of escarpment north of Blake Creek. 19-88. Photo by C.L. Baker. Carbon County, Utah. cc 1900. #1:/Balsley Collection/bjr0001a ID. Balsley, J.R. 1a Airplant view of Niagara Falls. Niagara County, New York and Province of Ontario, Canada. July 1949. #1:/Balsley J.R. Collection/bjr00003 ID. Balsley, J.R. 3 Tilted beds between Rawlins and Laramie, Wyoming. 1949. #1:/Balsley Collection/bjr00007 ID. Balsley, J.R. 7 Meanders in Laremie River. Albany County, Wyoming. 1949. #1:/Balsley Collection/bjr00008 ID. Balsley, J.R. 8 Meanders in Laremie River. Albany County, Wyoming. 1949. #1:/Balsley J.R. Collection/bjr00021 ID. Balsley, J.R. 21 Oxbow lakes and White River, Des Arc. Prairie County, Arkansas. 1949. #1:/Balsley J.R. Collection/bjr00022 ID. Balsley, J.R. 22 Oxbow lakes and White River, Des Arc. Prairie County, Arkansas. 1949. #1:/Grand Canyon National Park/bjr00078 ID. Balsley, J.R. 78 Grand Canyon National Park, Arizona. Lava flows. 1950. #1:/Barbour, E.H. Collection/beh00012 ID. Barbour, E.H. 12 Henry Mathiesen's stationary turbin mill near Grand Island. Cost. $.32. Hall County, Nebraska. August 17, 1898. Published as plate 19-A in U. S. Geological Survey. Water-supply paper 29. 1899. #1:/Barbour, E.H. Collection/beh00013 ID. Barbour, E.H. 13 Four fan battle ax mill built by Jacob Geiss of Grand Island. Pumps water for 125 cattle. Hall County, Nebraska. August 17, 1898. #1:/Barbour, E.H. Collection/beh00017 ID. Barbour, E.H. 17 Stationary turbine built by Fred Mathiesen, near Grand Island. Front view. Hall County, Nebraska. December 27, 1898. #1:/Barbour, E.H. Collection/beh00019 ID. Barbour, E.H. 19 Fred Mathiesen's stationary turbin mill near Grand Island. Hall County, Nebraska. August 17, 1898. Published as plate 19-B in U. S. Geological Survey. Water-supply paper 29, 1899. #1:/Barbour, E.H. Collection/beh00022 ID. Barbour, E.H. 22 Another view of eight fan battle ax mill built by Deidtrich Henning near Grand Island. Cost including tank $14.00. Hall County, Nebraska. August 17, 1898. Published as plate 16-B in U. S. Geological Survey. Water-supply paper 29. 1899. #1:/Barbour, E.H. Collection/beh00023 ID. Barbour, E.H. 23 Fred Woulffs battle ax mill near Grand Island. Waters 40 cattle. Hall County, Nebraska. December 27, 1898. Published as plate 15-B in U. S. Geological Survey. Water-supply paper 29. 1899. #1:/Barbour, E.H. Collection/beh00027 ID. Barbour, E.H. 27 A geared turbine, made by Henry Boersen, Grand Island, Cost $2.00. Hall County, Nebraska. December 27, 1898. #1:/Barbour, E.H. Collection/beh00034 ID. Barbour, E.H. 34 Large battle ax mill on J. S. Peckham's farm. Pumps 22,300 gallons per day in a 15 mile wind. Dawson County, Nebraska. August 19, 1898. #1:/Barbour, E.H. Collection/beh00037 ID. Barbour, E.H. 37 The Dutch mill built by August Prinz near Chalco. Grinds 200 bushels of corn per day. Sarpy County, Nebraska. July 21., 1898. Published as plate 18-A in U. S. Geological Survey. Water-supply paper 29. 1899. #1:/Barbour, E.H. Collection/beh00041 ID. Barbour, E.H. 41 Giant turbine invented and built by J. M. Warner, Overton. Twenty foot wheel grinds feed and irrigates alfalfa. Dawson County, Nebraska. August 18, 1898. Published as plate 20-A in U. S. Geological Survey. Water-supply paper 29. 1899. #1:/Barbour, E.H. Collection/beh00051 ID. Barbour, E.H. 51 Irrigating pond and reconstructed mill on Elmer Jasperson's farm near Ashland. Saunders County, Nebraska, ca. 1898. Published plate 21-B in U. S. Geological Survey. Waters-supply paper 29, 1899. #1:/Alaska-Bulletin 335/aww00010 ID. Atwood, W.W. 10 Bering Glacier showing ice cliffs on the edge of Bering River. Katalla district, Alaska Gulf region, Alaska. 1905. Plate 6-B in U.S. Geological Survey. Bulletin 335. 1908. #1:/Alaska Glaciers/aww00018 ID. Atwood, W.W. 18 First Berg Lake Bering Glacier. Controller Bay Region, Alaska. 1905. #1:/Alaska Glaciers/aww00020 ID. Atwood, W.W. 20 2000 ft. Peneplain. Controller Bay Region, Alaska. 1905. #1:/Alaska-Bulletin 335/aww00022 ID. Atwood, W.W. 22 Chugach Mountains and Martin River Glacier from Monument Mountain looking northeast. Katalla district, Alaska Gulf region, Alaska. 1905. Plate 4-A in U.S. Geological Survey. Bulletin 335. 1908. #1:/Alaska Glaciers/aww00023 ID. Atwood, W.W. 23 Kushtaka Glacier from near Monument Mountain in the Chugach Mountains. Controller Bay Region, Alaska. 1905. #1:/Alaska Glaciers/aww00024 ID. Atwood, W.W. 24 Across Martin Glacier from near Monument Mountain in the Chugach Mountains. Controller Bay Region, Alaska. 1905. #1:/Klondike Gold Rush National Historic Park/aww00065 ID. Atwood, W.W. 65 Klondike Gold Rush National Historic Park, Alaska. Train crossing cantilevered White Pass Railroad bridge. Photo was probably taken from the rear of the train. 1907. #1:/Klondike Gold Rush National Historic Park/aww00066 ID. Atwood, W.W. 66 Klondike Gold Rush National Historic Park, Alaska. Part of White Pass and Yukon freight train, showing three steam engines dispersed among the freight cars. 1907. #1:/Canada/aww00096 ID. Atwood, W.W. 96 Canada. Effects of hillside creep on railroad tracks near Coal Creek. 1907. #1:/Alaska-Bulletin 467/aww00134 ID. Atwood, W.W. 134 Unga Harbor from the west. Shumagin district, Southwestern Alaska region, Alaska. 1908. Plate 9-A in U.S. Geological Survey. Bulletin 467. 1911. #1:/Alaska-Bulletin 467/aww00136 ID. Atwood, W.W. 136 East coast of Unga Island north of Unga Harbor. Shumagin district, Southwestern Alaska region, Alaska. 1908. Plate 5-B in U.S. Geological Survey. Bulletin 467. 1911. #1:/Alaska-Bulletin 467/aww00137 ID. Atwood, W.W. 137 Shore line stack or pillar on east shore of Unga Island. Composed of basaltic lavas and volcanic tuffs. Shumagin district, Southwestern Alaska region, Alaska. 1908. Plate 9-B in U.S. Geological Survey. Bulletin 467. 1911. #1:/Alaska-Bulletin 467/aww00143 ID. Atwood, W.W. 143 Elevated sea terrace at northeast end of Unga Island. Miocene beds are exposed in the cliff below the terrace level. Shumagin district, Southwestern Alaska region, Alaska. 1908. Plate 10-A in U.S. Geological Survey. Bulletin 467. 1911. #1:/Alaska-Bulletin 467/aww00145 ID. Atwood, W.W. 145 Sea caves and an arch rock along east coast of Unga Island. Shumagin district, Southwestern Alaska region, Alaska. 1908. Plate 12-A in U.S. Geological Survey. Bulletin 467. 1911. #1:/Alaska-Bulletin 467/aww00155 ID. Atwood, W.W. 155 Detailed view of coarse volcanic tuff of post-Miocene age as exposed n shores of Balboa Bay. Moller district, Southwestern Alaska region, Alaska. 1908. Plate 10-B in U.S. Geological Survey. Bulletin 467. 1911. #1:/Alaska-Bulletin 467/aww00157 ID. Atwood, W.W. 157 Pyramid Mountain near axis of Aleutian Range northwest from Balboa Bay, a laccolithic mountain with Kenai sediments at the summit. Pavlov district, Southwestern Alaska region, Alaska. 1908. Plate 9-A in U.S. Geological Survey. Bulletin 467. 1911. #1:/Alaska-Bulletin 467/aww00162 ID. Atwood, W.W. 162 Tulimit Point, locally known as Castle Cape, at south entrance to Chignik Bay. Chignik district, Southwestern Alaska region, Alaska. 1908. Plate 5-A in U.S. Geological Survey. Bulletin 467. 1911. #1:/Alaska-Bulletin 467/aww00166 ID. Atwood, W.W. 166 Shore line pillar of conglomerate, this has been separated from a neighboring cliff by wave erosion. Southwestern Alaska region, Alaska. 1908. Plate 12-B in U.S. Geological Survey. Bulletin 467. 1911. #1:/Alaska-Bulletin 467/aww00168 ID. Atwood, W.W. 168 Exposure in the upper coal seam in Thompson Valley. Chignik district, Southwestern Alaska region, Alaska. 1908. Plate 13-B in U.S. Geological Survey. Bulletin 467. 1911. #1:/Alaska-Bulletin 467/aww00174 ID. Atwood, W.W. 174 Hook Bay near north entrance to Chignik Bay, this is the nearest harbor to the coal prospects northwest of this bay. The lowland at the left has been selected a town site. . Chignik district, Southwestern Alaska region, Alaska. 1908. Plate 13-A in U.S. Geological Survey. Bulletin 467. 1911. #1:/Alaska-Bulletin 467/aww00180 ID. Atwood, W.W. 180 Entrance to Chignik River Coal mine. Chignik district, Southwestern Alaska region, Alaska. 1908. Plate 14-A in U.S. Geological Survey. Bulletin 467. 1911. #1:/Utah-Professional paper 61/aww00185 ID. Atwood, W.W. 185 Glaciated surfaces in basin of Mill B, a tributary to Big Cottonwood Creek. Salt Lake County, Utah. circa 1905, plate 15-B in U.S. Geological Survey. Professional paper 61. 1909. #1:/Utah-Professional paper 61/aww00186 ID. Atwood, W.W. 186 Mount Timpanogos, at head of basin 10, showing approximately horizontal strata, elevation of summit is 11,750 feet. Utah County, Utah. circa 1905, plate 11-B in U.S. Geological Survey. Professional paper 61. 1909. #1:/Utah-Professional paper 61/aww00187 ID. Atwood, W.W. 187 Head of Bear River basin, showing high bounding walls. Summit County, Utah. circa 1905, plate 7-B in U.S. Geological Survey. Professional paper 61. 1909. #1:/Utah-Professional paper 61/aww00188 ID. Atwood, W.W. 188 Upper part of East Fork of Bear River basin (basin 33), showing characteristic U-shaped form of a glaciated canyon. Summit County, Utah. circa 1905, plate 7-A in U.S. Geological Survey. Professional paper 61. 1909. #1:/Utah-Professional paper 61/aww00189 ID. Atwood, W.W. 189 Rounded summit on rim of Uinta basin. Uinta County, Utah. circa 1905, plate 3-A in U.S. Geological Survey. Professional paper 61. 1909. #1:/Utah-Professional paper 61/aww00190 ID. Atwood, W.W. 190 Unglaciated portion of American Fork Canyon. Utah County, Utah. circa 1905, plate 12- A in U.S. Geological Survey. Professional paper 61. 1909. #1:/Utah-Professional paper 61/aww00191 ID. Atwood, W.W. 191 Upper part of Provo basin, showing a rock basin lake and portions of the waste swept floor of the catchment area. All the passes shown in this view were occupied by ice. Summit County, Utah. circa 1905, plate 9-B in U.S. Geological Survey. Professional paper 61. 1909. #1:/Colorado-Professional paper 95/aww00203 ID. Atwood, W.W. 203 Section of boulder member of Ridgway till at locality no. 10 near Ridgway; all loose material was removed and glacial boulders exposed. Ouray County, Colorado. September 1913. Plate 4-A in U.S. Geological Survey. Professional paper 95. 1916. #1:/Colorado-Professional paper 95/aww00204 ID. Atwood, W.W. 204 Section of boulder member of Ridgway till at locality no. 10 near Ridgway; the till immediately underlies the Telluride conglomerate, distance between white marks is about 8 feet. Ouray County, Colorado. September 1913. Plate 4-A in U.S. Geological Survey. Professional paper 95. 1916. #1:/Colorado-Professional paper 95/aww00205 ID. Atwood, W.W. 205 Detailed view of the boulder member of the Ridgway till at the type section locality, 1 mile west of Ridgway. Ouray County, Colorado. September 1913. Plate 3-A in U.S. Geological Survey. Professional paper 95. 1916. #1:/Colorado-Professional paper 95/aww00206 ID. Atwood, W.W. 206 Ridgway till at the type locality, 1 mile west of Ridgway; described thus, the cliff in which the till is exposed contains the Mancos shale at the base. Overlying the shale unconformably is a section 80 to 100 feet thick which exhibits all the usual characteristics of glacial till. This section appears from a distance a distinct yellow band. Above the yellow band, resting upon an uneven erosion surface is a dark slate colored stratum, which on careful examination has been found to be a glacial till. The upper till sheet is overlain by a layer of the Telluride conglomerate which varies in thickness from 70 feet at the south (left) end of the section shown to 10 or 15 feet an the north end. Above the Telluride conglomerate, also upon erosion surface is a remnant of San Juan tuff. Ouray County, Colorado. September 1913. Plate 2-A in U.S. Geological Survey. Professional paper 95. 1916. #1:/Colorado-Professional paper 166/aww00228 ID. Atwood, W.W. 228 Rio Grande Pyramid and Stewart Pass; the pyramid (13,380 feet) is a volcanic cone constructed upon the San Juan peneplain and left standing high above its surroundings when the adjacent valleys were excavated during the dissection of the deformed peneplain. Hinsdale County, Colorado. 1918. Plate 11-B, U.S. Geological Survey Professional paper 166. 1932. #1:/Colorado-Professional paper 166/aww00256 ID. Atwood, W.W. 256 Black Canyon of the Gunnison River, view upstream to Curecanti Needle, a conspicuous feature resulting from differential weathering and erosion. Gunnison County, Colorado. circa 1920. Plate 17-A, U.S. Geological Survey Professional paper 166. 1932. #1:/Colorado-Bulletin 685/aww00261 ID. Atwood, W.W. 261 La Jara reservoir, the moraine shows in the foreground. The distant hills are composed of lava flows. Conejos County, Colorado. Plate 8-B in U.S. Geological Survey. Bulletin 685. 1918. #1:/Colorado-Bulletin 685/aww00262 ID. Atwood, W.W. 262 La Jara reservoir dam, morainic material appears in the foreground. Conejos County, Colorado. Plate 8-A in U.S. Geological Survey. Bulletin 685. 1918. #1:/Colorado-Bulletin 685/aww00310 ID. Atwood, W.W. 310 Ignacio reservoir and dam. La Plata County, Colorado. Plate 2-C in U.S. Geological Survey. Bulletin 685. 1918. #1:/Colorado-Bulletin 685/aww00314 ID. Atwood, W.W. 314 Santa Maria reservoir from the north, a spillway appears near the left end of the dam. The control gated is regulated from the little on the dam. Mineral County, Colorado. Plate 3-B in U.S. Geological Survey. Bulletin 685. 1918. #1:/Colorado-Bulletin 685/aww00315 ID. Atwood, W.W. 315 Santa Maria reservoir from the north, Bristol head is at the left. The landslide mass blocking the reservoir at the south appears just beyond the water. The dam appears in the foreground. At the left in the foreground glacial drift is exposed. Mineral County, Colorado. Plate 3-A in U.S. Geological Survey. Bulletin 685. 1918. #1:/Colorado-Bulletin 685/aww00319 ID. Atwood, W.W. 319 Outlet of the Santa Maria Reservoir. Mineral County, Colorado. Plate 3-C in U.S. Geological Survey. Bulletin 685. 1918. #1:/Alaska-Bulletin 631/ehm00017 ID. Eakin, H.M. 17 Solifluction slopes of mature development, Koyuk River region, Hughes district, Yukon region, Alaska. 1913. Plate 7-C in U.S. Geological Survey. Bulletin 631. 1916. #1:/Alaska-Bulletin 449/ehm00050 ID. Eakin, H.M. 50 Granite pinnacles north of Kwiniuk River. Council district, Seward Peninsula region, Alaska. 1909. Plate 11-B in U.S. Geological Survey. Bulletin 449. 1911. #1:/Alaska-Bulletin 449/ehm00072 ID. Eakin, H.M. 72 Uplands between East Fork and Inglutalik River. Koyuk district, Seward Peninsula region, Alaska. 1909. Plate 2-B in U.S. Geological Survey. Bulletin 449. 1911. #1:/Alaska-Bulletin 449/ehm00075 ID. Eakin, H.M. 75 Surface markings on sandstones of Shaktolik group, Inglutalik divide. Koyuk district, Seward Peninsula region, Alaska. 1909. Plate 11-A in U.S. Geological Survey. Bulletin 449. 1911. #1:/Alaska-Bulletin 631/ehm00107 ID. Eakin, H.M. 107 Altiplanation terrace, Hogatza Mountains. Hughes district, Yukon region, Alaska. 1913. Plate 9-C in U.S. Geological Survey. Bulletin 631. 1916 #1:/Alaska Eakin Collection/ehm00123 ID. Eakin, H.M. 123 Young Eskimos [natives]. Shungnak Quad. Kobuk district, Alaska Northern region, Alaska. cc 1911. #1:/Alaska Eakin Collection/ehm00124 ID. Eakin, H.M. 124 Young Eskimo lad [native]. Shungnak Quad. Kobuk district, Alaska Northern region, Alaska. cc 1911. #1:/Alaska Eakin Collection/ehm00133 ID. Eakin, H.M. 133 Eskimo native game by the Squirrel River. Shungnak Quad. Kobuk district, Alaska Northern region, Alaska. cc 1911. #1:/Alaska Eakin Collection/ehm00134 ID. Eakin, H.M. 134 Two Eskimo [native] women named Oksuk and Oh-uk by the Squirrel River. Eskimo mother and child in background. Shungnak Quad. Kobuk district, Alaska Northern region, Alaska. cc 1911. #1:/Alaska-Bulletin 535/ehm00145 ID. Eakin, H.M. 145 Splash dam on Little Minook Creek. Koyukuk district, Yukon region, Alaska. 1911. Plate 8-A in U.S. Geological Survey. Bulletin 535. 1913. #1:/Alaska-Bulletin 535/ehm00148 ID. Eakin, H.M. 148 Close folding in limestone on spur north of Ruby Creek. Koyukuk district, Yukon region, Alaska. 1911. Plate 5-A in U.S. Geological Survey. Bulletin 535. 1913. #1:/Alaska-Bulletin 535/ehm00155 ID. Eakin, H.M. 155 Eocene beds overlain unconformably by silts in the Palisades of the Yukon, composed principally of sands and fine conglomerates but contain abundant kaolin, as shown by their white color. Koyukuk district, Yukon region, Alaska. 1911. Plate 6-B in U.S. Geological Survey. Bulletin 535. 1913. #1:/Alaska-Bulletin 535/ehm00156 ID. Eakin, H.M. 156 Lower end of the Ramparts, showing edge of the lowlands to the right and the hills forming the left wall the Ramparts in the center. The chief gorge of the Ramparts is opposite the distant hills. Koyukuk district, Yukon region, Alaska. 1911. Plate 2-A in U.S. Geological Survey. Bulletin 535. 1913. #1:/Alaska-Bulletin 535/ehm00161 ID. Eakin, H.M. 161 Up Minook valley from the Yukon, showing broad level topped terraces which locally carry auriferous gravels. Koyukuk district, Yukon region, Alaska. 1911. Plate 2-B in U.S. Geological Survey. Bulletin 535. 1913. #1:/Alaska-Bulletin 631/ehm00181 ID. Eakin, H.M. 181 Altiplanation terrace developed in quartzite schist near camp 10. Dall district, Yukon region, Alaska. 1913. Plate 8-B in U.S. Geological Survey. Bulletin 631. 1916. #1:/Alaska-Bulletin 631/ehm00182 ID. Eakin, H.M. 182 Close folding in greenstone, Ray-Dall divide. Dall district, Yukon region, Alaska. 1913. Plate 3-C in U.S. Geological Survey. Bulletin 631. 1916. #1:/Alaska-Bulletin 631/ehm00193 ID. Eakin, H.M. 193 Granite pinnacles near camp 11. Ray River basin. Dall district, Yukon region, Alaska. 1913. Plate 3-B in U.S. Geological Survey. Bulletin 631. 1916. #1:/Alaska-Bulletin 631/ehm00196 ID. Eakin, H.M. 196 Solifluction slope in profile 1 mile west of camp 12. Dall district, Yukon region, Alaska. 1913. Plate 7-B in U.S. Geological Survey. Bulletin 631. 1916. #1:/Alaska-Bulletin 631/ehm00204 ID. Eakin, H.M. 204 Glaciated valley, southwestern headwater of Ray River. Dall district, Yukon region, Alaska. 1913. Plate 4-C in U.S. Geological Survey. Bulletin 631. 1916. #1:/Alaska-Bulletin 631/ehm00210 ID. Eakin, H.M. 210 Outwash plain near head of Tozitna River. Tozi district, Yukon region, Alaska. 1913. Plate 6-A in U.S. Geological Survey. Bulletin 631. 1916. #1:/Alaska-Bulletin 631/ehm00225 ID. Eakin, H.M. 225 Erratic boulder, Ray Mountains. Dall district, Yukon region, Alaska. 1913. Plate 6-B in U.S. Geological Survey. Bulletin 631. 1916. #1:/Alaska-Bulletin 631/ehm00230 ID. Eakin, H.M. 230 Solifluction slope at camp 17. Tozi district, Yukon region, Alaska. 1913. Plate 7-A in U.S. Geological Survey. Bulletin 631. 1916. #1:/Alaska-Bulletin 631/ehm00243 ID. Eakin, H.M. 243 Altiplanation terraces near Indian River placer camp. Hughes district, Yukon region, Alaska. 1913. Plate 8-C in U.S. Geological Survey. Bulletin 631. 1916. #1:/Alaska-Bulletin 631/ehm00246 ID. Eakin, H.M. 246 Altiplanation terraces, mountains east of Pocahontas Creek, Indian River district, Hughes district, Yukon region, Alaska. 1913. Plate 9-A in U.S. Geological Survey. Bulletin 631. 1916. #1:/Alaska-Bulletin 631/ehm00260 ID. Eakin, H.M. 260 Melozitna valley, 30 miles from the Yukon. Melozi district, Yukon region, Alaska. 1913. Plate 4-A in U.S. Geological Survey. Bulletin 631. 1916. #1:/Alaska-Bulletin 631/ehm00267 ID. Eakin, H.M. 267 Melozitna canyon, 5 miles from the Yukon. Melozi district, Yukon region, Alaska. 1913. Plate 4-B in U.S. Geological Survey. Bulletin 631. 1916. #1:/Alaska-Bulletin 631/ehm00278 ID. Eakin, H.M. 278 Burned and partly fallen timber, Ray River basin. Dall district, Yukon region, Alaska. 1913. Plate 3-A in U.S. Geological Survey. Bulletin 631. 1916. #1:/Alaska-Bulletin 631/ehm00279 ID. Eakin, H.M. 279 Solifluction slopes encroaching upon a granite boss near camp 5. Dall district, Yukon region, Alaska. 1913. Plate 8-A in U.S. Geological Survey. Bulletin 631. 1916. #1:/Alaska-Bulletin 631/ehm00334 ID. Eakin, H.M. 334 Altiplanation feature, 10 miles north of Tanana. Tozi district, Yukon region, Alaska. 1914. Plate 10-A in U.S. Geological Survey. Bulletin 631. 1916. #1:/Alaska-Bulletin 631/ehm00337 ID. Eakin, H.M. 337 Frost heaved mound, showing fresh rock fragments, 10 miles north of Tanana. Tozi district, Yukon region, Alaska. 1914. Plate 10-B in U.S. Geological Survey. Bulletin 631. 1916. #1:/Alaska-Northern Alaska Region-Professional paper 109/ehm00342 ID. Eakin, H.M. 342 Ground ice in wind blown silts; Tanana River, Yukon region, Alaska. Before 1919. Figure 15 in U.S. Geological Survey. Professional paper 109. 1919. #1:/Alaska-Bulletin 667/ehm00382 ID. Eakin, H.M. 382 Hogback ridge supported by upper limb of recumbent synclinal fold. Kuskokwim region, Alaska. 1915. Plate 6-B in U.S. Geological Survey. Bulletin 667. 1918. #1:/Alaska-Bulletin 667/ehm00385 ID. Eakin, H.M. 385 Folds in turf where part of the slide came to rest. Kuskokwim region, Alaska. 1915. Plate 8-B in U.S. Geological Survey. Bulletin 667. 1918. #1:/Alaska-Bulletin 667/ehm00386 ID. Eakin, H.M. 386 Looking down the course of a recent landslide in the uplands between camps 12 and 14. Kuskokwim region, Alaska. 1915. Plate 8-A in U.S. Geological Survey. Bulletin 667. 1918. #1:/Alaska-Bulletin 667/ehm00399 ID. Eakin, H.M. 399 North fork of the Kuskokwim River near camp 15. Kuskokwim region, Alaska. 1915. Plate 3-B in U.S. Geological Survey. Bulletin 667. 1918. #1:/Alaska-Bulletin 667/ehm00406 ID. Eakin, H.M. 406 Looking down on terraced spur from the flat-topped mountain at the south end of the diabase-basalt area. Yukon region, Alaska. 1915. Plate 7-B in U.S. Geological Survey. Bulletin 667. 1918. #1:/Alaska-Bulletin 667/ehm00411 ID. Eakin, H.M. 411 Flat summit and terraces due to altiplanation granite mountain 2 miles southeast camp 24. Yukon region, Alaska. 1915. Plate 7-A in U.S. Geological Survey. Bulletin 667. 1918. #1:/Alaska-Bulletin 667/ehm00413 ID. Eakin, H.M. 413 Open birch forest on high well drained slopes near camp 27. Yukon region, Alaska. 1915. Plate 3-A in U.S. Geological Survey. Bulletin 667. 1918. #1:/Alaska-Bulletin 667/ehm00419 ID. Eakin, H.M. 419 Thin-bedded slate and limestone member of schist-quartzite group 2 miles southeast camp 32. Yukon region, Alaska. 1915. Plate 4-B in U.S. Geological Survey. Bulletin 667. 1918. #1:/Alaska-Bulletin 667/ehm00424 ID. Eakin, H.M. 424 Massive Ordovician limestones 1,500 feet below fossil horizon, 3 miles north of camp 36. Yukon region, Alaska. 1915. Plate 5-B in U.S. Geological Survey. Bulletin 667. 1918. #1:/Alaska-Bulletin 667/ehm00426 ID. Eakin, H.M. 426 Thin bedded Ordovician limestones underlying fossiliferous member looking northeast from fossil locality 1 mile northwest of camp 36. Yukon region, Alaska. 1915. Plate 6-A in U.S. Geological Survey. Bulletin 667. 1918. #1:/Alaska-Bulletin 667/ehm00429 ID. Eakin, H.M. 429 Characteristic topography of Ordovician limestone where steeply tilted looking north from a point half a mile southeast of camp 37. Yukon region, Alaska. 1915. Plate 5-A in U.S. Geological Survey. Bulletin 667. 1918. #1:/Alaska-Bulletin 667/ehm00438 ID. Eakin, H.M. 438 Cherty-pre-Ordovician limestone 2 miles north east of camp 41. Yukon region, Alaska. 1915. Plate 4-A in U.S. Geological Survey. Bulletin 667. 1918. #1:/Alaska-Bulletin 699/ehm00449 ID. Eakin, H.M. 449 Cable tramway formerly used in stacking boulders, Porcupine Creek. Skagway district, Southeastern Alaska region, Alaska. 1916. Plate 6-A in U.S. Geological Survey. Bulletin 699. 1919. #1:/Alaska-Bulletin 699/ehm00452 ID. Eakin, H.M. 452 Thin bedded limestones and slates, Porcupine Creek. Skagway district, Southeastern Alaska region, Alaska. 1916. Plate 4-B in U.S. Geological Survey. Bulletin 699. 1919. #1:/Alaska-Bulletin 699/ehm00454 ID. Eakin, H.M. 454 Diverting flume, Porcupine Creek. Skagway district, Southeastern Alaska region, Alaska. 1916. Plate 7-A in U.S. Geological Survey. Bulletin 699. 1919. #1:/Alaska-Bulletin 699/ehm00456 ID. Eakin, H.M. 456 Glaciated mountains at the head of McKinley Creek, McKinley Creek in middle ground. Skagway district, Southeastern Alaska region, Alaska. 1916. Plate 3-A in U.S. Geological Survey. Bulletin 699. 1919. #1:/Alaska-Bulletin 699/ehm00459 ID. Eakin, H.M. 459 Spruce and hemlock forest near Pleasant camp. Skagway district, Southeastern Alaska region, Alaska. 1916. Plate 3-B in U.S. Geological Survey. Bulletin 699. 1919. #1:/Canada-Bulletin 699/ehm00461 ID. Eakin, H.M. 461 Klehini River at evening high water a few miles above Pleasant Camp, the stream was fordable here earlier in the day. British Columbia, Canada. 1916. Plate 4-A in U.S. Geological Survey. Bulletin 699. 1919. #1:/Alaska-Bulletin 699/ehm00463 ID. Eakin, H.M. 463 Flume and spillway, Glacier Creek dam. Skagway district, Southeastern Alaska region, Alaska. 1916. Plate 8-A in U.S. Geological Survey. Bulletin 699. 1919. #1:/Alaska-Bulletin 699/ehm00464 ID. Eakin, H.M. 464 Detail of Glacier Creek flume, showing use of riffle blocks. Skagway district, Southeastern Alaska region, Alaska. 1916. Plate 8-B in U.S. Geological Survey. Bulletin 699. 1919. #1:/Alaska-Bulletin 699/ehm00465 ID. Eakin, H.M. 465 Upper end of abandoned canyon of McKinley Creek, the glacial filling has been sluiced out for a short distance. The water of the falls comes from a hydraulic plant and spills over the rim of the modern canyon into McKinley Creek. Skagway district, Southeastern Alaska region, Alaska. 1916. Plate 5-A in U.S. Geological Survey. Bulletin 699. 1919. #1:/Alaska-Bulletin 699/ehm00466 ID. Eakin, H.M. 466 Worked-out section of modern McKinley Creek canyon, note position of abandoned canyon at head of waterfalls, same shown in Eakin 468. Skagway district, Southeastern Alaska region, Alaska. 1916. Plate 7-B in U.S. Geological Survey. Bulletin 699. 1919. #1:/Alaska-Bulletin 699/ehm00467 ID. Eakin, H.M. 467 Crane hoist stacking boulders behind cribbing at sides of sluice box on McKinley Creek bench placer. Skagway district, Southeastern Alaska region, Alaska. 1916. Plate 6-B in U.S. Geological Survey. Bulletin 699. 1919. #1:/Alaska-Bulletin 699/ehm00468 ID. Eakin, H.M. 468 Lower end of same abandoned canyon (see Eakin 465), showing glacial till exposed by placer workings. Skagway district, Southeastern Alaska region, Alaska. 1916. Plate 5-B in U.S. Geological Survey. Bulletin 699. 1919. #1:/Hansen W.R. Collection/hwr00010 ID. Hansen, W.R. 10ct Contorted Red Creek quartzite, more than two billion years old, intruded by dark igneous dike. Exposure is about 100 feet high. Uinta Mountains. Daggett County, Utah. n.d. Figure 40 (in black-and-white) in U.S. Geological Survey. Bulletin 1291. 1969. #1:/Hansen W.R. Collection/hwrc0019 ID. Hansen, W.R. 19cp Calcareous concretion in Frontier Formation along road to Diamond Mountain. Hammer for scale. Uintah County, Utah. June 1984. #1:/Hansen W.R. Collection/hwrc0021 ID. Hansen, W.R. 21cp Flatirons on Entrada Sandstone at Skull Creek, near U.S. Highway 40. Sec. 36, T. 4 N., R. 101 W., Moffat County, Colorado. June 1984. #1:/Hansen W.R. Collection/hwr027cp ID. Hansen, W.R. 27cp Charcoal kilns at Piedmont built by Moses Byrne in 1869, to supply pioneer smelters in the Utah Valley. Historical landmark. Piedmont is a ghost town on the former alinement of the Union Pacific railroad about 20 miles east-southeast of Evanston. Uinta County, Wyoming. July 1984. #1:/Hansen W.R. Collection/hwr028cp ID. Hansen, W.R. 28cp Charcoal kilns at Piedmont built by Moses Byrne in 1869, to supply pioneer smelters in the Utah Valley. Historical landmark. Piedmont is a ghost town on the former alinement of the Union Pacific railroad about 20 miles east-southeast of Evanston. Uinta County, Wyoming. July 1984. #1:/Rainbow Bridge National Monument/hwr00028 ID. Hansen, W.R. 28ct Rainbow Bridge National Monument, Utah. Underside of Rainbow Bridge. 1959. #1:/Hansen W.R. Collection/hwr029cp ID. Hansen, W.R. 29cp Charcoal kilns at Piedmont built by Moses Byrne in 1869, to supply pioneer smelters in the Utah Valley. Historical landmark. Piedmont is a ghost town on the former alinement of the Union Pacific railroad about 20 miles east-southeast of Evanston. Uinta County, Wyoming. July 1984. #1:/Rainbow Bridge National Monument/hwr00029 ID. Hansen, W.R. 29ct Rainbow Bridge National Monument, Utah. Rainbow Bridge, looking upstream toward Navajo Mountain. 1959. #1:/Hansen W.R. Collection/hwr030cp ID. Hansen, W.R. 30cp Charcoal kilns at Piedmont built by Moses Byrne in 1869, to supply pioneer smelters in the Utah Valley. Historical landmark. Piedmont is a ghost town on the former alinement of the Union Pacific railroad about 20 miles east-southeast of Evanston. Uinta County, Wyoming. July 1984. #1:/Hansen W.R. Collection/hwr031cp ID. Hansen, W.R. 31cp Historical marker for charcoal kilns at Piedmont built by Moses Byrne in 1869 to supply pioneer smelters in the Utah Valley. Piedmont is a ghost town on the former alinement of the Union Pacific railroad about 20 miles east-southeast of Evanston. Uinta County, Wyoming. July 1984. #1:/Hansen W.R. Collection/hwr032cp ID. Hansen, W.R. 32cp Charcoal kilns at Piedmont built by Moses Byrne in 1869 to supply pioneer smelters in the Utah Valley. Historical landmark. Piedmont is a ghost town on the former alinement of the Union Pacific railroad about 20 miles east-southeast of Evanston. Uinta County, Wyoming. July 1984. #1:/Hansen W.R. Collection/hwr033cp ID. Hansen, W.R. 33cp Ulrich fish quarry at Fossil, Wyoming, 9 miles west of Kemmerer. Visited by party of Senator Malcolm Wallop of Wyoming. Shirley Ulrich at center of picture. Senator Wallop behind Mrs. Ulrich in rust-colored anorak. Lincoln County, Wyoming. July 1984. #1:/Rainbow Bridge National Monument/hwr00034 ID. Hansen, W.R. 34ct Rainbow Bridge National Monument, Utah. Telephoto view of Rainbow Bridge, looking upstream. 1959. #1:/Fossils/hwr034cp ID. Hansen, W.R. 34cp Fossils. Prepared Priscacara fossil, a late early Eocene sunfish. The specimen is about 80 percent natural size. Collected from the Green River Formation 9 miles west of Kemmerer. Specimen prepared by W.R. Hansen. Lincoln County, Wyoming. July 1984. #1:/Rainbow Bridge National Monument/hwr00035 ID. Hansen, W.R. 35ct Rainbow Bridge National Monument, Utah. Rainbow Bridge, looking upstream. 1959. #1:/Hansen W.R. Collection/hwr036cp ID. Hansen, W.R. 36cp Diplomystus, a late-early Eocene herring from the Green River Formation 9 miles west of Kemmerer. About 1/2 natural size. Dorsal scutes partly separated from body. Worm-like objects are fish coprolites containing fragments of fish bones. Specimen prepared by W. R. Hansen. Lincoln County, Wyoming. July 1984. #1:/Fossils/hwrc0037 ID. Hansen, W.R. 37cp Fossils. Prepared Diplomystus fossil, a late early Eocene herring. The specimen is about one-half natural size. Dorsal scutes are partly separated from the body. The worm-like objects are fish coprolites containing fragments of fish bones. Collected from the Green River Formation 9 miles west of Kemmerer, Wyoming. July 1984. #1:/Hansen W.R. Collection/hwr038cp ID. Hansen, W.R. 38cp Bishop Conglomerate (Oligocene, light pink) unconformably overlying Moenkopi Formation (Triassic, orange and white) near east end of Diamond Mountain. Exposed thickness of Bishop here is 400-500 feet. Sec. 31, T. 2 S., R. 25 E., Uintah County, Utah. June 1984. #1:/Rainbow Bridge National Monument/hwr00040 ID. Hansen, W.R. 40ct Rainbow Bridge National Monument, Utah. Alcove undercutting Bridge Creek, one mile above Rainbow Bridge. 1959. #1:/Rainbow Bridge National Monument/hwr00041 ID. Hansen, W.R. 41ct Rainbow Bridge National Monument, Utah. Alcove in tributary of Bridge Creek. Springs in bedding plane. 1959. #1:/Hansen W.R. Collection/hwr00063 ID. Hansen, W.R. 63ct Sweetwater Granite showing exfoliation structures. Granite Mountains. Fremont County, Wyoming. 1969. #1:/Hansen W.R. Collection/hwr00067 ID. Hansen, W.R. 67ct Northeast toward Black Rock desert from sec. 11, T. 32 N., R. 24 E. Pershing County, Nevada. 1969. #1:/Hansen W.R. Collection/hwr00096 ID. Hansen, W.R. 96 Conglomeratic channel fill in Browns Park Formation at measured section B-14, unit 7, near mouth of Jesse Ewing Canyon. Channel is about 10 feet deep at base of conglomeratic sequence, 64 feet thick. Conglomerate is derived mainly from Uinta Mountain Group but contains pebbles and cobbles derived from Red Creek Quartzite and from reworked limestones of Paleozoic age. Daggett County, Utah. ca. 1953. Figure 39 in U.S. Geological Survey. Professional paper 490. 1965. #1:/Black Canyon Of The Gunnison National Park/hwr00121 ID. Hansen, W.R. 121 Black Canyon Of The Gunnison National Park, Colorado. Talus blocks in the canyon bottom at the foot of Painted Wall. The foot passage through such areas is precarious. The river is flowing at a rate of about 250 cubic feet per second. The falls on the left are about 10 feet high. During high water, all the large blocks in the foreground are engulfed in a whitewater rapid. August 29 1962. Figure 4, U.S. Geological Survey Bulletin 1191. #1:/Black Canyon Of The Gunnison National Park/hwr00122 ID. Hansen, W.R. 122 Black Canyon Of The Gunnison National Park, Colorado. Chasm Wall, at the north end of vernal Mesa, has a nearly vertical drop of 1,800 feet. Only the upper half of the cliff is shown in this photograph. The rock is vernal Mesa Quartz Monzonite. Exfoliation along vertical joints contributes to sheerness. 1962. Figure 5, U.S. Geological Survey Bulletin 1191. #1:/Black Canyon of the Gunnison National Park/hwr00123 ID. Hansen, W.R. 123 Black Canyon of the Gunnison National Park, Colorado. Contorted gneiss on the north rim of Black Canyon near Colorado State Highway 92. The contortions were caused by flowage under great heat and pressure in the depths of the earth's crust. Complicated structures such as these are confined to the Precambrian rocks. Light-colored bands are mostly feldspar and quartz; dark bands are mostly quartz and biotite. Figure 9, U.S. Geological Survey Bulletin 1191. #1:/Black Canyon Of The Gunnison National Park/hwr00124 ID. Hansen, W.R. 124 Black Canyon Of The Gunnison National Park, Colorado. Painted Wall, the greatest cliff in Colorado, averages about 2,250 feet from rim to river. The cliff is carved from gneiss interlaced with pegmatite dikes. Deep fissures to the right of center are controlled by weathering along joints. Frontispiece, U.S. Geological Survey Bulletin 1191. #1:/Black Canyon Of The Gunnison National Park/hwr00126 ID. Hansen, W.R. 126 Black Canyon Of The Gunnison National Park, Colorado. Pegmatite dike intruding biotite gneiss in Black Canyon, about four-tenths of a mile downstream from the mouth of Red Rock Canyon. The dike stands out because of superior erosive resistance. Note similar dikes in the cliffs above. 1962. Figure 13, U.S. Geological Survey Bulletin 1191. #1:/Black Canyon Of The Gunnison National Park/hwr00130 ID. Hansen, W.R. 130 Black Canyon Of The Gunnison National Park, Colorado. Isolated pinnacles of quartzitic gneiss, bounded by vertical joints (in the shade) and foliation planes. Sapping by frost is the chief cause of deep clefts along joint planes. Pinnacles are about 1,600 feet high on the northeast rim opposite Pulpit Rock. 1962. Figure 20, U.S. Geological Survey Bulletin 1191. #1:/Black Canyon Of The Gunnison National Park/hwr00135 ID. Hansen, W.R. 135 Black Canyon Of The Gunnison National Park, Colorado. Narrows of the Black Canyon. About 40 feet wide at this point, the river impinges on nearly vertical walls of resistant gneiss. The canyon here is about 1,750 feet deep and about 1,100 feet wide from rim to rim. 1962. Figure 3, U.S. Geological Survey Bulletin 1191. #1:/Hansen W.R. Collection-Dinosaur National Monument/hwr00147 ID. Hansen, W.R. 147 Paleontologist carefully chips rock matrix from a column of dinosaur vertebrae. These bones will be left in place for the visitor to see them just as they were deposited. Dinosaur National Monument. Uintah County, Utah. n.d. #1:/Hansen W.R. Collection/hwr00148 ID. Hansen, W.R. 148 Ripplemarks on the Dakota Sandstone. Jefferson County, Colorado. October 16, 1966. (Photo by J. R. Stacy) #1:/Hansen W.R. Collection/hwr00149 ID. Hansen, W.R. 149 Fossil fish, Diplomystus dantatus, showing the bones, ray, fins, etc., embedded in a slab of rock from a quarry in Green River (Tertiary) formation. Western Wyoming, n.d. (Also see Photo No. 1308 by W. T. Lee) Published as figure 51 in U. S. Survey. Bulletin 1291. 1969. #1:/Hansen W.R. Collection/hwr00174 ID. Hansen, W.R. 174 Rockfall on eastbound lane of Interstate 70, 2 miles west of Bergen Park interchange (El Rancho). Failure was along joints (fractures) and foliation planes (layering) in Precambrian gneiss. Rockfall obstructed all of eastbound land and medium and part of westbound lane before cleanup began. Estimated weight of largest boulders exceeded 200 tons. Jefferson County, Colorado. May 8, 1973. Figure 18 in U.S. Geological Survey. Circular 689. 1973. #1:/Hampton E.R. Collection/hwr00179 ID. Hansen, W.R. 179 Debris-mudflow blocking Hogback Road about 1 mile north of Morrison on west side of Dakota hogback. Photo by E.R. Hampton Jefferson County, Colorado. May 7, 1973. Figure 13 in U.S. Geological Survey. Circular 689. 1973. #1:/Hansen W.R. Collection/hwr00181 ID. Hansen, W.R. 181 Small debris slide on eastbound exit ramp of Interstate 70 at Genessee Mountain. Material is loam slope dressing and colluvium. Jefferson County, Colorado. 1973. Figure 5 in U.S. Geological Survey. Circular 689. 1973. #1:/Hansen W.R. Collection/hwr00182 ID. Hansen, W.R. 182 Small slump in Laramie Formation on Boulder County road 2 miles west of Jefferson County Airport. Over steepened slope and heavy rains triggered failure. Crown of slide is about 20 feet above roadway. Boulder County, Colorado. May 8, 1973. Figure 16 in U.S. Geological Survey. Circular 689. 1973. #1:/Hansen W.R. Collection/hwr00395 ID. Hansen, W.R. 395 Petroglyphs on Frontier sandstone at South Valley near Manilla. Pick is used for scale. Daggett County, Utah. August 1952. #1:/Hansen W.R. Collection/hwr00396 ID. Hansen, W.R. 396 Petroglyphs on Frontier sandstone at South Valley near Manilla. Pick is used for scale. Daggett County, Utah. August 1952. #1:/Hansen W.R. Collection/hwr00397 ID. Hansen, W.R. 397 Hansen, W. R. 397-397a Panorama of glacial seracs terminus of Mendenhall Glacier. Juneau district, Southeastern Alaska region, Alaska, ca, 1956. #1:/Hansen W.R. Collection/hwr00398 ID. Hansen, W.R. 398 Close-up view showing details of terminus of Mendenhall Glacier. Juneau district. Southeastern Alaska region, Alaska, ca. 1956. #1:/Hansen W.R. Collection/hwr0398a ID. Hansen, W.R. 398a Close-up view showing details of terminus of Mendenhall Glacier, slightly different than Photo No. hwr00398. Juneau district, Southeastern Alaska region, Alaska. ca. 1956. #1:/Alaska Glaciers/hwr00399 ID. Hansen, W.R. 399 Alaska Glaciers. Terminus of Mendenhall Glacier, which is northwest of Juneau in the Coast Mountains. Trees in the foreground. Juneau district, Southeastern Alaska region, Alaska, ca. 1956. #1:/Hansen W.R. Collection/hwr00400 ID. Hansen, W.R. 400 Close-up view of terminus of Mendenhall Glacier. Juneau district, Southeastern Alaska region, Alaska. ca. 1956. #1:/Hansen W.R. Collection/hwr00401 ID. Hansen, W.R. 401 Close-up view of terminus of Mendenhall Glacier, good view of glacier breaking up. Juneau district, Southeastern Alaska region, Alaska, ca. 1956. #1:/Hansen W.R. Collection/hwr00402 ID. Hansen, W.R. 402 Distant view of terminus of Mendenhall Glacier, trees in foreground obscure parts of the glacier. Juneau district. Southeastern Alaska region, Alaska, ca. 1956. #1:/Alaska Glaciers/hwr00403 ID. Hansen, W.R. 403 Alaska Glaciers. Terminus of Mendenhall Glacier, which is northwest of Juneau in the Coast Mountains. Juneau district, Southeastern Alaska region, Alaska, ca. 1956. #1:/Hansen W.R. Collection/hwr00416 ID. Hansen, W.R. 416 Hansen, W. R. 416 Panorama of terminus of Portage Glacier and Portage Lake. This is a composite of Photos 416,417,418,and 419. Anchorage district. Cook Inlet region, Alaska, ca, 1956. #1:/Hansen W.R. Collection/hwr00420 ID. Hansen, W.R. 420 Portage Lake with glacial ice, highway on the right, with a car approaching. Anchorage district, Cook Inlet region, Alaska. ca. 1956. #1:/Hansen W.R. Collection/hwr00421 ID. Hansen, W.R. 421 Portage Lake with ice. Anchorage district, Cook Inlet region, Alaska. ca. 1956. #1:/Hansen W.R. Collection/hwr00422 ID. Hansen, W.R. 422 Distant view of Portage Glacier terminus, with Portage Lake in the foreground. Anchorage district, Cook Inlet region, Alaska, ca. 1956. #1:/Hansen W.R. Collection/hwr00423 ID. Hansen, W.R. 423 View of portion of Portage Lake and ice. Anchorage district, Cook Inlet region, Alaska, ca. 1956. #1:/Hansen W.R. Collection-Dinosaur National Monument/hwr00460 ID. Hansen, W.R. 460 Yampa Canyon from Yampa bench and Mantle Ranch road. Hells Canyon quadrangle. Dinosaur National Monument. Moffat County, Colorado. June 1959. #1:/Hansen W.R. Collection-Dinosaur National Monument/hwr00477 ID. Hansen, W.R. 477 Form a stereo pair of Mitten Park fault. Dinosaur National Monument. Moffat County, Colorado. 1959. #1:/Hansen W.R. Collection-Dinosaur National Monument/hwr00478 ID. Hansen, W.R. 478 Form a stereo pair of Mitten Park fault. Dinosaur National Monument. Moffat County, Colorado. 1959. #1:/Hansen W.R. Collection-Dinosaur National Monument/hwr00479 ID. Hansen, W.R. 479 Whirlpool Canyon. Dinosaur National Monument. Moffat County, Colorado. 1959. #1:/Rainbow Bridge National Monument/hwr00622 ID. Hansen, W.R. 622 Rainbow Bridge National Monument, Utah. Pothole in Bridge Creek. 1959. #1:/Hansen W.R. Collection-Dinosaur National Monument/hwr00689 ID. Hansen, W.R. 689 Split Mountain anticline, view toward northeast. Dinosaur National Monument. Uintah County, Utah. September 1983. #1:/Hansen W.R. Collection-Dinosaur National Monument/hwr00727 ID. Hansen, W.R. 727 Rain erosion of slightly calcareous sand. Kennedy half-dollar for scale. Dinosaur National Monument. Moffat County, Colorado. September 1983. #1:/Hansen W.R. Collection-Dinosaur National Monument/hwr00729 ID. Hansen, W.R. 729 Head of Anderson Hole, Yampa Canyon. Cliff of Morgan Formation (Pennsylvania) viewed from rim of East Cactus Flat. Dinosaur National Monument. Moffat County, Colorado. September 1983. #1:/Hansen W.R. Collection-Dinosaur National Monument/hwr00730 ID. Hansen, W.R. 730 Yampa Canyon upstream from Anderson Hole. Round Valley, Morgan, and Weber Formations, from bottom to top. Seen from rim of East Cactus Flat. Dinosaur National Monument. Moffat County, Colorado. September 1983. #1:/Hansen W.R. Collection-Dinosaur National Monument/hwr00735 ID. Hansen, W.R. 735 Yampa bench area from Harpers Plateau. Red Rock anticline, right, below Pearl Park bench. Round Top Mountain, center right on skyline. Fire on flank of Tankls Peak. Low escarpment of Gartra Member of Chinle Formation, middle distance to left of road. Escarpment of Yampa Fault below mountains in distance. Dinosaur National Monument. Moffat County, Colorado. September 1983. #1:/Hansen W.R. Collection-Dinosaur National Monument/hwr00736 ID. Hansen, W.R. 736 Yampa Canyon and dissected country east of Harpers Corner trail, cut into Weber Sandstone. Dinosaur National Monument. Moffat County, Colorado. September 1983. #1:/Hansen W.R. Collection-Dinosaur National Monument/hwr00740 ID. Hansen, W.R. 740 Mitten Park Fault in Dinosaur National Monument. Zenobia Peak shown in upper left of photo. Moffat County, Colorado. September 1983. #1:/Hansen W.R. Collection-Dinosaur National Monument/hwr00742 ID. Hansen, W.R. 742 Across Yampa bench toward Tanks Peak. Fire in Johnson Draw. Hells Canyon, right. Yampa Canyon, middle distance, left. Sand Canyon, foreground, left. Dinosaur National Monument. Moffat County, Colorado. August 22, 1983. #1:/Alaska Glaciers/hars0005 ID. Hartshorn, J.H. 5 Looking northeast toward east edge of Sheridan Glacier (left) and front of Sherman Glacier. Malaspina Reconnaissance Project. Cordova (O3) quadrangle. Tasnuna district, Copper River region, Alaska. June 1956. #1:/Alaska Glaciers/hars0006 ID. Hartshorn, J.H. 6 View from farther west looking northeast toward east edge of Sheridan Glacier and front of Sherman Glacier. Malaspina Reconnaissance Project. Cordova (O3) quadrangle. Tasnuna district, Copper River region, Alaska. June 1956. #1:/Alaska Glaciers/hars0007 ID. Hartshorn, J.H. 7 Looking north toward Sheridan Glacier. Malaspina Reconnaissance Project. Cordova (C-3) quadrangle. Tasnuna district, Copper River region, Alaska. June 1956. #1:/Alaska Glaciers/hars0008 ID. Hartshorn, J.H. 8 Continuation of Photo No. hars0007 from slightly further west. Looking north at the west edge of Sheridan Glacier. Malaspina Reconnaissance Project. Cordova (C-3) quadrangle. Tasnuna district, Copper River region, Alaska. June 1956. #1:/Alaska Glaciers/hars0009 ID. Hartshorn, J.H. 9 Alaska Glaciers. East over Miles Lake at the terminus of Miles Glacier, which is north of Katalla in the Chugach Mountains. June 1956. Malaspina Reconnaissance project. #1:/Alaska Glaciers/hars0010 ID. Hartshorn, J.H. 10 Alaska Glaciers. Over Miles Lake at the terminus of Miles Glacier, which is north of Katalla in the Chugach Mountains. June 1956. Malaspina Reconnaissance project. #1:/Alaska Glaciers/hars0011 ID. Hartshorn, J.H. 11 View looking southeast at the southern margin of Miles Glacier terminus. Malaspina Reconnaissance Project. Cordova (C-2) quadrangle. Nizina district, Copper River region, Alaska. June 1956. #1:/Alaska Glaciers/hars0012 ID. Hartshorn, J.H. 12 View from just over edge of Miles Lake. Showing southern margin of Miles Glacier terminus, Malaspina Reconnaissance Project. Cordova (C-2) quadrangle. Nizina district, Copper River region, Alaska. June 1956. #1:/Alaska Glaciers/hars0015 ID. Hartshorn, J.H. 15 View southwestward from above frozen ice-marginal lake about eight miles east of Miles Lake on north side of Miles Glacier. Malaspina Reconnaissance Project. Cordova (C-l) quadrangle. Nizina district, Copper River region, Alaska. June 1956. #1:/Alaska Glaciers/hars0016 ID. Hartshorn, J.H. 16 View southwestward from above frozen ice-marginal lake about eight miles east of Miles Lake on north side of Miles Glacier. Malaspina Reconnaissance Project. Cordova (C-l) quadrangle. Nizina district, Copper River region, Alaska. June 1956. #1:/Alaska Glaciers/hars0018 ID. Hartshorn, J.H. 18 Alaska Glaciers. Over outwash of Woodworth Glacier, which is southeast of Valdez in the Chugach Mountains. June 1956. Malaspina Reconnaissance project. Photos hars0018 and hars0019 may form a panorama. #1:/Alaska Glaciers/hars0019 ID. Hartshorn, J.H. 19 Alaska Glaciers. Over outwash of Woodworth Glacier, which is southeast of Valdez in the Chugach Mountains. June 1956. Malaspina Reconnaissance project. Photos hars0018 and hars0019 may form a panorama. #1:/Alaska Glaciers/hars0020 ID. Hartshorn, J.H. 20 View looking south at Woodworth Glacier from above the outwash plain of the glacier and the Tasnuna River. Note enlarged and smoothed crevasses in glacier, Dyson ridges in front. Views progress further east. Malaspina Reconnaissance Project. Valdez (A-3) quadrangle. Tasnuna district, Copper River region, Alaska. June 1956. #1:/Alaska Glaciers/hars0021 ID. Hartshorn, J.H. 21 View looking south at esker leading into ice contact edge of outwash fan in front of Woodworth Glacier. Malaspina Reconnaissance Project. Tasnuna district, Copper River region, Alaska. June 1956. #1:/Alaska Glaciers/hars0022 ID. Hartshorn, J.H. 22 View looking southwest of Woodworth Glacier and the esker (see Photo No. hars0021) and southeast ice contact edge of outwash fan. Malaspina Reconnaissance Project. Tasnuna district, Copper River region, Alaska, June 1956, #1:/Alaska Glaciers/hars0023 ID. Hartshorn, J.H. 23 View looking southwestward toward Woodworth Glacier shows outwash and a series of curved ridges in ground moraine. Malaspina Reconnaissance Project. Tasnuna district, Copper River region, Alaska. June 1956. #1:/Alaska Glaciers/hars0026 ID. Hartshorn, J.H. 26 View north from above center of Woodworth Glacier terminus; ice-marginal stream in foreground; Dyson ridges with boulders; vegetation line (different ages?) esker and fan upper right. Malaspina Reconnaissance Project. Tasnuna district, Copper River region, Alaska. June 1956. #1:/Alaska Glaciers/hars0027 ID. Hartshorn, J.H. 27 View east down Tasnuna River valley showing proglacial esker and fan in front of Woodworth Glacier. Hills behind esker may be vegetation-and-debris-covered dead ice. Malaspina Reconnaissance Project. Tasnuna district, Copper River region, Alaska. June 1956. #1:/Alaska Glaciers/hars0028 ID. Hartshorn, J.H. 28 View leaking south from above Tasnuna River valley of the Schwan Glacier showing vegetation covered Dyson ridges; ridges up on bedrock shoulder; beautiful wide and melting back crevasse system. Malaspina Reconnaissance Project. Valdez (A-3) quadrangle. Tasnuna district, Copper River region, Alaska. June 1956. #1:/Alaska Glaciers/hars0029 ID. Hartshorn, J.H. 29 View from further east looking south from above Tasnuna River valley of the Schwan Glacier showing vegetation covered Dyson ridges; ridges up on bedrock shoulder; beautiful wide and melting back crevasse system. Valdez (A-3) quadrangle. Tasnuna district, Copper River region, Alaska. June 1956. #1:/Alaska Glaciers/hars0030 ID. Hartshorn, J.H. 30 View looking south of eastern margin of terminus of Schwan Glacier. Medial moraine with ice holding it up; Dyson ridges; more vegetation than on Woodworth Glacier. Valdez (A-3) quadrangle. Tasnuna district, Copper River region, Alaska. June 1956. #1:/Alaska Glaciers/hars0031 ID. Hartshorn, J.H. 31 View looking south of eastern margin of terminus of Schwan Glacier. Medial moraine with ice holding it up; Dyson ridges; more vegetation than on Woodworth Glacier. Valdez (A-3) quadrangle. Tasnuna district, Copper River region, Alaska. June 1956. #1:/Alaska Glaciers/hars0032 ID. Hartshorn, J.H. 32 View looking south of eastern margin of Schwan Glacier. Note huge boulder on outwash. Valdez (A-3) quadrangle. Tasnuna district, Copper River region, Alaska. June 1956. #1:/Alaska Glaciers/hars0033 ID. Hartshorn, J.H. 33 View looking south of eastern margin of Schwan Glacier. Valdez (A-3) quadrangle. Tasnuna district, Copper River region, Alaska. June 1956. #1:/Alaska Glaciers/hars0034 ID. Hartshorn, J.H. 34 Vertical view of stagnant, nearly separated block of ice at front of Schwan Glacier showing Dyson ridges running beneath the ice. Valdez (A-3) quadrangle. Tasnuna district, Copper River region, Alaska. June 1956. (Malaspina Reconnaissance Project) #1:/Alaska Glaciers/hars0035 ID. Hartshorn, J.H. 35 Oblique view of stagnant, nearly separated block of ice at front of Schwan Glacier showing Dyson ridges. Note small morainic ridge of boulders in foreground. Valdez (A-3) quadrangle. Tasnuna district, Copper River region, Alaska. June 1956. (Malaspina Reconnaissance) #1:/Alaska Glaciers/hars0036 ID. Hartshorn, J.H. 36 Nearly vertical view of Schwan Glacier front with Dyson ridges, open crevasses and esker. Malaspina Reconnaissance Project. Valdez (A-3) quadrangle. Tasnuna district, Copper River region, Alaska. June 1956. #1:/Alaska Glaciers/hars0037 ID. Hartshorn, J.H. 37 View from above Copper River floodplain looking west up the Heney Glacier. Malaspina Reconnaissance Project. Cordova (D-2) quadrangle. Tasnuna district, Copper River region, Alaska. June 1956. #1:/Alaska Glaciers/hars0038 ID. Hartshorn, J.H. 38 View from above Copper River floodplain looking west up the Heney Glacier. Note large amounts of vegetation covered dead ice. Malaspina Reconnaissance Project. Cordova (D-2) quadrangle. Tasnuna district, Copper River region, Alaska. June 1956. #1:/Alaska Glaciers/hars0039 ID. Hartshorn, J.H. 39 View from above Copper River floodplain looking west towards Heney Glacier in the distance. Note large amounts of vegetation covered dead ice. Malaspina Reconnaissance Project. Cordova (D-2) quadrangle. Tasnuna district, Copper River region, Alaska. June 1956. #1:/Alaska Glaciers/hars0040 ID. Hartshorn, J.H. 40 Series of two photographs moving north to south along the margin of Allen Glacier from above the Copper River looking west at the glacier terminus (See also Photo No. hars0041). Malaspina Reconnaissance Project. Cordova (D-2) quadrangle. Tasnuna district, Copper River region, Alaska. June 1956. #1:/Alaska Glaciers/hars0041 ID. Hartshorn, J.H. 41 Series of two photographs moving north to south along the margin of Allen Glacier from above the Copper River looking west at the glacier terminus (see also Photo No. hars0040). Malaspina Reconnaissance Project. Cordova (D-2) quadrangle. Tasnuna district, Copper River region, Alaska. June 1956. #1:/Alaska Glaciers/hars0042 ID. Hartshorn, J.H. 42 View looking north towards Allen Glacier from above the Copper River. Note till ridges with polygonal plan in center. Malaspina Reconnaissance Project. Cordova (D-2) quadrangle. Tasnuna district, Copper River region, Alaska. June 1956. #1:/Alaska Glaciers/hars0043 ID. Hartshorn, J.H. 43 View from farther south looking north towards Allen Glacier from above the Copper River. Malaspina Reconnaissance Project. Cordova (D-2) quadrangle. Tasnuna district, Copper River region, Alaska. June 1956. #1:/Alaska Glaciers/hars0046 ID. Hartshorn, J.H. 46 Looking south down abandoned channel of Abercrombie Rapids. Malaspina Reconnaissance Project. Cordova (C-2) quadrangle. Nizina district, Copper River region, Alaska. June 1956. #1:/Alaska Glaciers/hars0048 ID. Hartshorn, J.H. 48 Near south end of Abercrombie Rapids looking northwest toward Grinnell Glacier. Note high lateral moraine; rock shoulder. Malaspina Reconnaissance Project. Cordova (C-2) quadrangle. Tasnuna district, Copper Ri^er region, Alaska. June 1956. #1:/Alaska Glaciers/hars0049 ID. Hartshorn, J.H. 49 Sequence of photographs (Photo Nos. hars0049-hars0054) taken moving from north to south of Childs Glacier. Note railroad bridge, forested "terminal moraine", debris-covered dead ice, calving glacier front, protective screen of outwash, crevasse pattern, moraine and dirt structure in ice. Cordova (C-2) quadrangle. Tasnuna district, Copper River region, Alaska. June 1956. #1:/Alaska Glaciers/hars0050 ID. Hartshorn, J.H. 50 Sequence of photographs (Photo Nos. hars0049-hars0054) taken moving from north to south of Childs Glacier. Note railroad bridge, forested "terminal moraine", debris-covered dead ice, calving glacier front, protective screen of outwash, crevasse pattern, moraine and dirt structure in ice. Cordova (C-2) quadrangle. Tasnuna district, Copper River region, Alaska. June 1956. #1:/Alaska Glaciers/hars0051 ID. Hartshorn, J.H. 51 Sequence of photographs (Photo Nos. hars0049-hars0054) taken moving from north to south of Childs Glacier. Note railroad bridge, forested "terminal moraine", debris-covered dead ice, calving glacier front, protective screen of outwash, crevasse pattern, moraine and dirt structure in ice. Cordova (C-2) quadrangle. Tasnuna district, Copper River region, Alaska. June 1956. #1:/Alaska Glaciers/hars0052 ID. Hartshorn, J.H. 52 Sequence of photographs (Photo Nos. hars0049-hars0054) taken moving from north to south of Childs Glacier. Note railroad bridge, forested "terminal moraine", debris-covered dead ice, calving glacier front, protective screen of outwash, crevasse pattern, moraine and dirt structure in ice. Cordova (C-2) quadrangle. Tasnuna district, Copper River region, Alaska. June 1956. #1:/Alaska Glaciers/hars0053 ID. Hartshorn, J.H. 53 Sequence of photographs (Photo Nos. hars0049-hars0054) taken moving from north to south of Childs Glacier. Note railroad bridge, forested "terminal moraine", debris-covered dead ice, calving glacier front, protective screen of outwash, crevasse pattern, moraine and dirt structure in ice. Cordova (C-2) quadrangle. Tasnuna district, Copper River region, Alaska. June 1956. #1:/Alaska Glaciers/hars0054 ID. Hartshorn, J.H. 54 Sequence of photographs (Photo Nos. hars0049-hars0054) taken moving from north to south of Childs Glacier. Note railroad bridge, forested "terminal moraine", debris-covered dead ice, calving glacier front, protective screen of outwash, crevasse pattern, moraine and dirt structure in ice. Cordova (C-2) quadrangle. Tasnuna district, Copper River region, Alaska. June 1956. #1:/Alaska Glaciers/hars0055 ID. Hartshorn, J.H. 55 Alaska Glaciers. Toward Childs Glacier, which is northwest of Katalla in the Chugach Mountains, looking west, showing moraine and outwash. June 1956. Malaspina Reconnaissance project. #1:/Alaska Glaciers/hars0057 ID. Hartshorn, J.H. 57 Alaska Glaciers. View looking northeast of termninus of Martin River Glacier, just east of the Copper River delta; shows term inal moraine and Deadwood Lake (See also Photo No. hars0056). Malaspina Reconnaissance Project. Cordova (B-1) quadrangle, Katalla district, Alaska Gulf region, Alaska. June 1956. Cordova (B-1) quadrangle. Malaspina Reconnaissance Project. Katalla district, Alaska Gulf region, Alaska. June 1956, #1:/Alaska Glaciers/hars0058 ID. Hartshorn, J.H. 58 Alaska Glaciers. View showing northern margin and terminus of Martin River Glacier with unnamed tributary glacier approaching from the north. Note vegetation differences at margin, Cordova (B-1) quadrangle. Malaspina Reconnaissance Project. Katalla district, Alaska Gulf region, Alaska. June 1956, #1:/Alaska Glaciers/hars0061 ID. Hartshorn, J.H. 61 Alaska Glaciers. Toward the terminus of Bering Glacier, which is east- southeast of Cordova on the Malaspina Coastal Plain, viewed from above the Bering River, which appears to be first lake south of Berg Lake. June 1956. Malaspina Reconnaissance project. #1:/Alaska Glaciers/hars0062 ID. Hartshorn, J.H. 62 Alaska Glaciers. A closer view from further south then Photo hars0061, looking southeast over Bering Glacier from above Bering River at source which appears to be first lake south of Berg Lake. Note debris covered dead ice out in front of main ice body (see also Photo No. hars0061). Note till ridge pattern and small esker. Bering Glacier (B-6) quadrangle. Katalla district, Alaska Gulf region, Alaska. June 1956, #1:/Alaska Glaciers/hars0063 ID. Hartshorn, J.H. 63 Alaska Glaciers. Sub- or englacial stream emerging from western border of Bering Glacier; crevasses from collapse of tunnel roof of nearby stream. Malaspina Reconnaissance project. Katalla district, Alaska Gulf region, Alaska. June 1956, #1:/Alaska Glaciers/hars0068 ID. Hartshorn, J.H. 68 Alaska Glaciers. Waterfalls from Berg Lake cutting through bedrock gorge and disappearing under ice of Bering Glacier in foreground. Malaspina Reconnaissance Project. Bering Glacier (B-6) quadrangle. Katalla district, Alaska Gulf region, Alaska. June 1956, #1:/Alaska Glaciers/hars0069 ID. Hartshorn, J.H. 69 Alaska Glaciers. Western margin of Bering Glacier looking west-southwest toward Bering Lake(?). Malaspina Reconnaissance Project. Katalla district, Alaska Gulf region, Alaska. June 1956, #1:/Alaska Glaciers/hars0096 ID. Hartshorn, J.H. 96 Alaska Glaciers. Terminus of White River Glacier, which is east of Cape Yakataga in the Chugach Mountains. June 1956. Malaspina Reconnaissance project. #1:/Alaska Glaciers/hars0097 ID. Hartshorn, J.H. 97 Alaska Glaciers. Terminus of White River Glacier, which is east of Cape Yakataga in the Chugach Mountains. June 1956. Malaspina Reconnaissance project. #1:/Alaska Glaciers/hars0102 ID. Hartshorn, J.H. 102 Alaska Glaciers. View over Icy Bay looking southeast toward Riou Bay. West side of Malaspina Glacier. Note ice in Icy Bay in foreground. Malaspina Reconnaissance Project. Icy Bay (D-l,D-2) quadrangles. Yakataga district, Alaska Gulf region, Alaska. June 1956. #1:/Alaska Glaciers/hars0103 ID. Hartshorn, J.H. 103 Alaska Glaciers. View easterly of small stream emerging from south side of Tyndall Glacier where it banks up against north side of Caetani Hills (Chaix Hills?). Malaspina Reconnaissance Project. Bering Glacier (A-1) quadrangle. Yakataga district, Alaska Gulf region, Alaska. June 1956. #1:/Alaska Glaciers/hars0104 ID. Hartshorn, J.H. 104 Alaska Glaciers. View easterly of IB1, the first delta and stream south of Guyot Glacier emerging from stagnant end of Tyndall Glacier. Malaspina Reconnaissance Project. Bering Glacier (A-1) quadrangle. Yakataga district, Alaska Gulf region, Alaska. June 1956. #1:/Alaska Glaciers/hars0105 ID. Hartshorn, J.H. 105 Alaska Glaciers. West (east?) side of Guyot Glacier where it calves into Icy Bay. Note detached piece of stagnant ice left center. Malaspina Reconnaissance Project. Bering Glacier (A-1) quadrangle. Yakataga district, Alaska Gulf region, Alaska. June 1956. #1:/Alaska Glaciers/hars0108 ID. Hartshorn, J.H. 108 Alaska Glaciers. View of southeast margin of Tyndall Glacier, about 4 to 5 miles from Icy Bay; note circular fractures around lake and stream. Malaspina Reconnaissance Project. Bering Glacier (A-1) quadrangle. Yakataga district, Alaska Gulf region, Alaska. June 1956. #1:/Alaska Glaciers/hars0109 ID. Hartshorn, J.H. 109 Alaska Glaciers. Marginal lake on southeast side of Tyndall Glacier 6 miles from Icy Bay. Malaspina Reconnaissance Project. Bering Glacier (A-1) quadrangle. Yakataga district, Alaska Gulf region, Alaska. June 1956. #1:/Alaska Glaciers/hars0112 ID. Hartshorn, J.H. 112 Alaska Glaciers. View looking south down Caetani River toward Icy Bay; note mudflow topography in foreground. Bering Glacier (A-1) quadrangle. Malaspina Reconnaissance Project. Yakataga district, Alaska Gulf region, Alaska. June 1956. #1:/Alaska Glaciers/hars0113 ID. Hartshorn, J.H. 113 Alaska Glaciers. Oily(?) Lake, frozen lake south of Moore Nunatak on northwest side of Malaspina Glacier. Malaspina Reconnaissance Project. Mount St. Elias (A-1) quadrangle. Yakutat district, Alaska Gulf region, Alaska. June 1956. #1:/Alaska Glaciers/hars0152 ID. Hartshorn, J.H. 152 Alaska Glaciers. Over Yakutat Bay looking north across Snake Lake and Sudden Stream. About 5,000 feet altitude. Malaspina Reconnaissance Project. Yakutat quadrangle. Yakutat district, Alaska Gulf region, Alaska. June 1956. #1:/Alaska Glaciers/hars0153 ID. Hartshorn, J.H. 153 Alaska Glaciers. Looking northeast from over Yakutat Bay up, Disenchantment Bay toward Hubbard Glacier (in the distance). Kwik Stream left center, Lucia and Atrevida Glaciers in mountains on left. Altitude about 5,000 feet. Malaspina Reconnaissance Project. Yakutat quadrangle. Yakutat district, Alaska Gulf region Alaska. June 1956. #1:/Alaska Glaciers/hars0168 ID. Hartshorn, J.H. 168 Alaska Glaciers. View north from above confluence of Malaspina and Hayden Glaciers of snow-covered Blossom Island. Note large gorge of pre-Hayden Kwik (Stream) much larger than in 1951. Altitude 1,000 feet. Malaspina Reconnaissance Project. Yakutat quadrangle. Yakutat district, Alaska Gulf region, Alaska. June 1956. #1:/Alaska Glaciers/hars0169 ID. Hartshorn, J.H. 169 Alaska Glaciers. Close-up of the pre-Hayden Kwik as it enters its gorge. About 500 feet altitude. Yakutat quadrangle. Yakutat district, Alaska Gulf region, Alaska. June 1956. #1:/Alaska Glaciers/hars0174 ID. Hartshorn, J.H. 174 Alaska Glaciers. View looking northeast of Malaspine (Glacier) and Blossom Island area. Malaspine Reconnaissance Project. Mount St. Elias quadrangle. Yakutat district, Alaska Gulf region, Alaska. June 1956. #1:/Alaska Glaciers/hars0175 ID. Hartshorn, J.H. 175 Alaska Glaciers. View looking northwest of small unnamed glacier and Marvine Glacier in background. Malaspine Reconnaissance Project. Mount St. Elias quadrangle. Yakutat district, Alaska Gulf region, Alaska. June 1956. #1:/Alaska Glaciers/hars0184 ID. Hartshorn, J.H. 184 Alaska Glaciers. Source of Lucia Stream on west side of Lucia Glacier and on east side of Floral Hills; note terraces across glacier. Altitude 1,000 feet. Malaspina Reconnaissance Project. Yakutat quadrangle. Yakutat district, Alaska Gulf region, Alaska. June 1956. #1:/Alaska Glaciers/hars0185 ID. Hartshorn, J.H. 185 Alaska Glaciers. View from 500 feet or less where Lucia Stream flows into Kwik Stream. Malaspina Reconnaissance Project. Yakutat quadrangle. Yakutat district, Alaska Gulf region, Alaska. June 1956. #1:/Alaska Glaciers/hars0250 ID. Hartshorn, J.H. 250 Alaska Glaciers. Looking north along calving margin of Hubbard Glacier. Malaspina Reconnaissance Project. Mount St. Elias quadrangle. Yakutat district, Alaska Gulf region, Alaska. June 1956 #1:/Alaska Glaciers/hars0251 ID. Hartshorn, J.H. 251 Alaska Glaciers. Above Disenchantment Bay looking east of north at Mount Seattle and eastern land margin of Hubbard Glacier Altitude 1,000 feet. Malaspina Reconnaissance Project. Mount St. Elias quadrangle. Yakutat district, Alaska Gulf region, Alaska. June 1956. #1:/Alaska Glaciers/hars0252 ID. Hartshorn, J.H. 252 Alaska Glaciers. Above Disenchantment Bay looking northeasterly toward Variegated Glacier. Interior Flat?. Altitude 1,000 feet. Malaspina Reconnaissance Project. Mount St. Elias quadrangle. Yakutat district, Southeastern Alaska region, Alaska. June 1956. #1:/Alaska Glaciers/hars0253 ID. Hartshorn, J.H. 253 Alaska Glaciers. View northwest up Russell Fiord toward Hubbard Glacier in the distance. Malaspina Reconnaissance Project. Yakutat quadrangle. Yakutat district, Alaska Gulf region, Alaska. June 1956. #1:/Alaska Glaciers/hars0254 ID. Hartshorn, J.H. 254 Alaska Glaciers. Hidden Glacier. Note the superglacial esker, flat top and sinuous. Is the exaggerated sinuosity due to movement of the ice? Note change from 1910 outwash. Altitude 500(?)feet. Malaspina Reconnaissance Project. Yakutat quadrangle. Yakutat district, Alaska Gulf region, Alaska. June 1956. #1:/Alaska Glaciers/hars0255 ID. Hartshorn, J.H. 255 Alaska Glaciers. Closer view than Photo No. hars0254 of Hidden Glacier. Note the superglacial esker, flat top and sinuous. Is the exaggerated sinuosity due to movement of the ice? Note the change from 1910 outwash. Altitude 500(?) feet. Malaspina Reconnaissance Project. Yakutat quadrangle. Yakutat district, Alaska Gulf region, Alaska. June 1956. #1:/Alaska Glaciers/hars0259 ID. Hartshorn, J.H. 259 Alaska Glaciers. Over outwash plain toward Hidden Glacier, which is northeast of Yakutat in the St. Elias Mountains. June 1956. Malaspina Reconnaissance project. #1:/Alaska Glaciers/hars0392 ID. Hartshorn, J.H. 392 Alaska Glaciers. Series of seven photographs (Photo Nos. hars0392-hars0398) taken from the southwest above the ice of Grand Plateau Glacier. Moving northwest to southeast. Malaspina Reconnaissance Project. Yakutat quadrangle. Lituya district, Alaska Gulf region, Alaska. June 1956. #1:/Alaska Glaciers/hars0393 ID. Hartshorn, J.H. 393 Alaska Glaciers. Series of seven photographs (Photo Nos. hars0392-hars0398) taken from the southwest above the ice of Grand Plateau Glacier. Moving northwest to southeast. Malaspina Reconnaissance Project. Yakutat quadrangle. Lituya district, Alaska Gulf region, Alaska. June 1956. #1:/Alaska Glaciers/hars0400 ID. Hartshorn, J.H. 400 Alaska Glaciers. View up Fairweather Glacier of dead ice and ablation moraine. Malaspina Reconnaissance Project. Mount Fair-weather (D-6) quadrangle. Lituya district, Alaska Gulf region, Alaska. June 1956. #1:/Alaska Glaciers/hars0401 ID. Hartshorn, J.H. 401 Alaska Glaciers. View from above the dead ice of Fairweather Glacier looking seaward at old high till hills. Malaspina Reconnaissance Project. Mount Fairweather (D-6) quadrangle. Lituya district, Alaska Gulf region, Alaska. June 1956. #1:/Alaska Glaciers/hars0408 ID. Hartshorn, J.H. 408 Alaska Glaciers. View looking north toward Sea Otter Glacier. Malaspina Reconnaissance Project. Mount Fair-weather (D-6) quadrangle. Lituya district, Alaska Gulf region, Alaska. June 1956. #1:/Alaska Glaciers/hars0409 ID. Hartshorn, J.H. 409 Alaska Glaciers. View up the first stream north of Sea Otter Creek, note the near-junction of these two glaciers. Malaspina Reconnaissance Project. Mount Fairweather (D-6) quadrangle. Lituya district, Alaska Gulf region, Alaska. June 1956. #1:/Alaska Glaciers/hars0441 ID. Hartshorn, J.H. 441 Alaska Glaciers. Series of five photographs (Photo Nos. hars0441-hars0445) taken from above Nunatak Fiord showing present position of terminus of Nunatak Glacier (East or West?) and frontal kanie delta (hars0442-hars0445) derived from marginal stream. Note grooved fiord walls (hars0441). Delta is probably good evidence of shallowing of fiord to place where glacier will soon debouch on dry land. Project this forward in time for interesting outwash plain structure. Malaspina Reconnaissance Project. Yakutat quadrangle. Yakutat district, Alaska Gulf region, Alaska. June 1956. #1:/Alaska Glaciers/hars0442 ID. Hartshorn, J.H. 442 Alaska Glaciers. Series of five photographs (Photo Nos. hars0441-hars0445) taken from above Nunatak Fiord showing present position of terminus of Nunatak Glacier (East or West?) and frontal kanie delta (hars0442-hars0445) derived from marginal stream. Note grooved fiord walls (hars0441). Delta is probably good evidence of shallowing of fiord to place where glacier will soon debouch on dry land. Project this forward in time for interesting outwash plain structure. Malaspina Reconnaissance Project. Yakutat quadrangle. Yakutat district, Alaska Gulf region, Alaska. June 1956. #1:/Alaska Glaciers/hars0443 ID. Hartshorn, J.H. 443 Alaska Glaciers. Series of five photographs (Photo Nos. hars0441-hars0445) taken from above Nunatak Fiord showing present position of terminus of Nunatak Glacier (East or West?) and frontal kanie delta (hars0442-hars0445) derived from marginal stream. Note grooved fiord walls (hars0441). Delta is probably good evidence of shallowing of fiord to place where glacier will soon debouch on dry land. Project this forward in time for interesting outwash plain structure. Malaspina Reconnaissance Project. Yakutat quadrangle. Yakutat district, Alaska Gulf region, Alaska. June 1956. #1:/Alaska Glaciers/hars0444 ID. Hartshorn, J.H. 444 Alaska Glaciers. Series of five photographs (Photo Nos. hars0441-hars0445) taken from above Nunatak Fiord showing present position of terminus of Nunatak Glacier (East or West?) and frontal kanie delta (hars0442-hars0445) derived from marginal stream. Note grooved fiord walls (hars0441). Delta is probably good evidence of shallowing of fiord to place where glacier will soon debouch on dry land. Project this forward in time for interesting outwash plain structure. Malaspina Reconnaissance Project. Yakutat quadrangle. Yakutat district, Alaska Gulf region, Alaska. June 1956. #1:/Alaska Glaciers/hars0475 ID. Hartshorn, J.H. 475 Alaska Glaciers. View of Mendenhall Glacier taken late in the evening on return flight, by Ken Loken from the Lemon Creek (Glacier); camp. Juneau (B-2) quadrangle. Juneau district, Southeastern Alaska region, Alaska. June 1956. #1:/Alaska Glaciers/hars0476 ID. Hartshorn, J.H. 476 Alaska Glaciers. View of Mendenhall Glacier taken late in the evening on return flight, by Ken Loken from the Lemon Creek (Glacier); camp. Juneau (B-2) quadrangle. Juneau district, Southeastern Alaska region, Alaska. June 1956. #1:/Fossils/heb01559 ID. Hardin, E.B. 1559 Fossil Fern. Pseudopecopteris macilenta. Upper Pottsville series. Washington County, Arkansas. Lepidocystis (Polysporia) salisburyi Lx. Pottsville series. Days Gap, Alabama. GSA 1404. #1:/Fossils/heb01571 ID. Hardin, E.B. 1571 Fossils. Eurypterus mansfieldi, Hall. Figured in Second Geological Survey of Pennsylvania, plate 5, figure 3. 1884. Report of Progress p.3. GSA 1416. Darlington County, Pennsylvania. #1:/Fossils/heb01572 ID. Hardin, E.B. 1572 Fossils. Fossil casts of Atrypa, Spinosa, Spircfer, Rhynchonella, and Tentaculites. #1:/Pennsylvania-Folio 162/heb01607 ID. Hardin, E.B. 1607 Granite gneiss at Leiperville quarry Crum Creek, Delaware County, Pennsylvania. Figure 11 in U.S. Geological Survey. Folio 152. 1909. #1:/Delaware Water Gap National Recreation Area/heb01626 ID. Hardin, E.B. 1626 Delaware Water Gap National Recreation Area, Pennsylvania. Great glacial grove on Table Rock. #1:/Delaware Water Gap National Recreation Area/heb01680 ID. Hardin, E.B. 1680 Delaware Water Gap National Recreation Area, Pennsylvania. View is from near Dunfield. #1:/North Dakota-Bulletin 611/bvh00029 ID. Barnett, V.H. 29 The Badlands of North Dakota, fantastic shapes abound in every valley and ravine. In places flying buttresses support the slender columns and gargoyles may be seen projecting from beneath the roof. Even with the scanty rainfall of this region every stream has carved for itself a channel - great ones for the large streams and small almost infinitesimal ones for the tiny rivulets that trickle down the slope - as shown in this view. Beaver Creek basin in background from east side of Sheep Mountain. Pennington County, South Dakota. 1909. Plate 8-B in U.S. Geological Survey. Bulletin 611. 1915. #1:/North Dakota-Bulletin 611/bvh00035 ID. Barnett, V.H. 35 The Badlands of North Dakota, away from the main stream the small branches and headwater streams are just beginning to cut into the level upland. The wealth of detail in such natural sculpture is beyond description. Sheep Mountain table from southwest. Pennington County, South Dakota. 1909. Plate 7-A in U.S. Geological Survey. Bulletin 611. 1915. #1:/North Dakota-Bulletin 611/bvh00053 ID. Barnett, V.H. 53 The Badlands of North Dakota, fantastic shapes abound in every valley and ravine. In places flying buttresses support the slender columns and gargoyles may be seen projecting from beneath the roof. Even with the scanty rainfall of this region every stream has carved for itself a channel - great ones for the large streams and small almost infinitesimal ones for the tiny rivulets that trickle down the slope. Protoceras beds (greenish conglomerate capping the pillars), south of White Biver, below mouth of Porcupine Creek. Washington County, South Dakota. 1909. Plate 8-A in U.S. Geological Survey. Bulletin 611. 1915. #1:/North Dakota-Bulletin 611/bvh00058 ID. Barnett, V.H. 58 The Badlands of North Dakota and Montana. Towers and pinnacles abound on every side. These are the remnants of hills and buttes or of a ledge of sandstone that now remains only as protecting caps to the columns of softer material beneath. Washington County, South Dakota. 1909. Plate 9-B in U.S. Geological Survey. Bulletin 611. 1915. #1:/North Dakota/bvh00059 ID. Barnett, V.H. 59 Sioux Indian "Chief Wild Horse" and family on the Pine Ridge Reservation. Shannon? County, South Dakota. 1909. #1:/North Dakota/bvh00060 ID. Barnett, V.H. 60 Casey Post-Office. Pennington County, South Dakota. 1909. #1:/Montana-Bulletin 611/bvh00063 ID. Barnett, V.H. 63 The watchful herder and the equally vigilant dogs guard the defenseless flock. Pennington County, South Dakota. 19009. Plate 12-A in U.S. Geological Survey. Bulletin 611. 1915. #1:/Barnett Collection/bvh00089 ID. Barnett, V.H. 89 Chandlar River Indians at Fort Yukon. Yukon flats district, Yukion region, Alaska. 1909. #1:/Barnett Collection/bvh00090 ID. Barnett, V.H. 90 An old graveyard of Hudson Bay Company, Fort Yukon. Yukon flats district, Yukion region, Alaska. 1909. #1:/Barnett Collection/bvh00091 ID. Barnett, V.H. 91 Fish camp of Black River Indians on Porcupine River. Yukon flats district, Yukion region, Alaska. 1909. #1:/South Dakota-Bulletin 575/bvh00117 ID. Barnett, V.H. 117 Surface of upland in Standing Rock and Cheyenne River Indian Reservations north of McIntosh, in T. 23 N., R. 22 E. Corson County, South Dakota. 1909. Plate 3-A in U.S. Geological Survey. Bulletin 575. 1914. #1:/North Dakota-Bulletin 575/bvh00120 ID. Barnett, V.H. 120 Glacial boulder on upland in T. 129 N., R. 80 W. about 5 miles southwest of Missouri River. Sioux County, North Dakota. 1909. Plate 8-B in U.S. Geological Survey. Bulletin 575. 1914. #1:/North Dakota-Bulletin 575/bvh00152 ID. Barnett, V.H. 152 Local unconformity in the Lance formation in T. 131, R. 81 W. Sioux County, North Dakota. 1909. Plate 5-B in U.S. Geological Survey. Bulletin 575. 1914. #1:/South Dakota-Bulletin 575/bvh00166 ID. Barnett, V.H. 166 Fault in bottom of Fox Hill sandstone or top of Pierre Shale in south bank of Grand River in Sec. 10, T. 14 N., R.19 E. Ziebach County, South Dakota. 1909. Plate 8-A in U.S. Geological Survey. Bulletin 575. 1914. #1:/Montana-Bulletin 611/bvh00177 ID. Barnett, V.H. 177 Sheepherders sandstone monument. Cascade County, Montana. 1909. Figure 10 in U.S. Geological Survey. Bulletin 611. 1915. #1:/Montana/bvh00179 ID. Barnett, V.H. 179 Noon camp and meal being eaten at open mess box, en route 15 miles northeast Fort Logan, Meagher County, Montana. 1909. #1:/Devils Tower National Monument/bvh00211 ID. Barnett, V.H. 211 Devils Tower National Monument, Wyoming. Timber of Devils Tower National Monument. 1910. #1:/Devils Tower National Monument/bvh00213 ID. Barnett, V.H. 213 Devils Tower National Monument, Wyoming. Devils Tower, viewed from the southwest. 1910. #1:/Montana-Bulletin 611/bvh00278 ID. Barnett, V.H. 278 A sheepherder at home in T. 42 N, R. 72 W., Campbell County, Wyoming. 1910. Plate 12-B in U.S. Geological Survey. Bulletin 611. 1915. #1:/Montana-Bulletin 611/bvh00278 ID. Barnett, V.H. 278 A sheepherder at home in T. 42 N, R. 72 W., Campbell County, Wyoming. 1910. Plate 12-B in U.S. Geological Survey. Bulletin 611. 1915.