GEOLEX

Summary of Citation: Wasatch

Publication:
Hayden, F.V., 1869, Preliminary field report [third annual] of
   Colorado and New Mexico: U.S. Geological Survey, 155 p.

Usage in Publication:
Wasatch group*

Modifications:	Geologic Province:	Dominant Lithology:
First used	Uinta uplift Wasatch uplift	Clay Sand

Summary:
First published use. No type locality designated. Named for exposures in Wasatch Mountains, UT. Recognized west of Fort Bridger, Uinta Co, WY. Well exposed in Echo and Weber Canyons, Summit Co, UT in the Wasatch Mountains on the Uinta uplift. Composed of variegated, mostly red sands and clays. Little calcareous matter found. Occupies a vast area and great thickness (3,000 to 5,000 ft). Is unfossiliferous and of middle Tertiary age.

Summary of Citation: Wasatch

Publication:
Veatch, A.C., 1907, Geography and geology of a part of southwestern
   Wyoming: U.S. Geological Survey Professional Paper, 56, 178
   p.

Usage in Publication:
Wasatch group*

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Greater Green River basin

Summary:
The three informal divisions of the Wasatch group of Hayden (1869)--1) basal reddish-yellow sandy clays and conglomerates, 2) light-colored rhyolitic ash beds with intercalated white limestone lenses with freshwater shells and leaves, and 3) reddish-yellow sandy clay and irregular sandstone beds named a) Almy formation, b) Fowkes formation, and c) Knight formation in this report. An unconformity separates the Fowkes from the Knight. The group overlies the Evanston formation and underlies the Green River formation. Geologic map; cross sections. The Almy and the Fowkes may be Cretaceous or they may be Eocene. The Knight is Eocene.

Summary of Citation: Wasatch

Publication:
Sears, J.D. and Bradley, W.H., 1924, Relations of the Wasatch
   and Green River formations in northwestern Colorado and
   southern Wyoming; with notes on oil shales in the Green River
   formation, IN Shorter contributions to general geology,
   1923-24: U.S. Geological Survey Professional Paper, 132-F,
   p. F93-F107

Usage in Publication:
Wasatch formation*

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Greater Green River basin

Summary:
Cathedral Bluffs, formerly designated Cathedral Bluffs red beds member of Green River, is reassigned to the Wasatch formation as the Cathedral Bluffs tongue. The Cathedral Bluffs overlies and intertongues with Tipton tongue (formerly Tipton shale member) of Green River formation. Cathedral Bluffs underlies and intertongues with Laney shale member of Green River. Cross section. The main body and the Cathedral Bluffs of the Wasatch are mapped (geologic map) in Sweetwater Co, WY and adjoining Moffat Co, CO in the Greater Green River basin. Of Eocene age.

Summary of Citation: Wasatch

Publication:
Spieker, E.M. and Reeside, J.B., Jr., 1925, Cretaceous and
   Tertiary formations of the Wasatch Plateau, Utah: Geological
   Society of America Bulletin, v. 36, no. 3, p. 435-454

Usage in Publication:
Wasatch formation*

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Wasatch uplift Paradox basin Uinta basin

Summary:
Revised on the Wasatch Plateau area of central UT (generally in parts of Sevier, Sanpete, Emery, and Carbon Cos in the Wasatch uplift, Paradox and Uinta basins) in that it is divided into a lower unnamed member, the newly named Flagstaff limestone member, and an upper unnamed member. The lower member consists of red, purple, gray shale and sandstone 1,200 to 2,000 ft thick; it has fresh-water limestone lenses at a few places. The Flagstaff is a dense, fine-grained, fossiliferous (ostracods, pelecypods, gastropods) limestone 800 to 1,000 ft thick. The upper member consists of varicolored shale, some sandstone, and thin beds of freshwater limestone. The upper member is present only on parts of the plateau. The members are not recognized in the Book Cliffs area. Cross sections. Tertiary age.

Summary of Citation: Wasatch

Publication:
Gregory, H.E. and Moore, R.C., 1931, The Kaiparowits region, a
   geographic and geologic reconnaissance of parts of Utah and
   Arizona: U.S. Geological Survey Professional Paper, 164, 161
   p.

Usage in Publication:
Wasatch formation*

Modifications:	Geologic Province:	Dominant Lithology:
Areal limits	Plateau sedimentary province Paradox basin

Summary:
Name extended to rocks of the Paunsaugunt, Table Cliff, and Aquarius Plateaus of Garfield and Kane Cos., UT or the Paradox basin and Plateau sedimentary province. These same rocks were designated by color "Pink cliffs," "upper white limestone..." or some other informal name. Fossil shells occur sporadically in formation. Said to have an "Eocene character of deposit."

Summary of Citation: Wasatch

Publication:
Eardley, A.J., 1944, Geology of the north-central Wasatch
   Mountains, Utah: Geological Society of America Bulletin, v.
   55, no. 7, p. 819-894

Usage in Publication:
Wasatch group

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Wasatch uplift Uinta uplift

Summary:
Divided into the Almy conglomerate, Fowkes?, and Knight? formations. Fowkes and Knight geographically extended to report area, Salt Lake and Morgan Cos, UT on the Wasatch uplift, and Summit Co, UT on the Uinta uplift. Almy can be divided into a lower division, the Pulpit conglomerate and an upper division, the Saw Mill conglomerate in southeast part of quad. The two conglomerates are separable on the basis of a conspicuous 5- to 30-degree angular unconformity. Where not separable, name Almy used as an undivided unit. Geologic map. Cross sections. Ranges from middle Paleocene? (Dragonian and Torrejonian), upper Paleocene? (Clarkforkian and Tiffanian), to early Eocene (Wasatchian?).

Summary of Citation: Wasatch

Publication:
Spieker, E.M., 1946, Late Mesozoic and early Cenozoic history
   of central Utah, IN Shorter contributions to general geology,
   1943-45: U.S. Geological Survey Professional Paper, 205-D,
   p. D117-D161

Usage in Publication:
Wasatch formation

Modifications:	Geologic Province:	Dominant Lithology:
Not used

Summary:
Name has been applied in central UT to variegated beds, presumably of early Eocene age, that were underlain by Price River formation and overlain by Green River formation. The variegated sequence was divided into a lower member, Flagstaff member, and an upper member. The former lower member is of Late Cretaceous and Paleocene age (fossils), and is named North Horn formation in this report. The former middle member is removed from Wasatch and raised in stratigraphic rank to Flagstaff limestone of Paleocene age. The former upper member is named Colton formation of Tertiary age in this report. Discusses history of use of Wasatch and questions whether name should be retained or abandoned. Name not used in report area, but is retained because of need to study type area and because of history of long use.

Summary of Citation: Wasatch

Publication:
Williams, J.S., 1948, Geology of the Paleozoic rocks, Logan
   quadrangle, Utah: Geological Society of America Bulletin, v.
   59, no. 11, p. 1121-1164

Usage in Publication:
Wasatch group

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Wasatch uplift

Summary:
New member recognized at base named the Cowley Canyon member in Cache Co, UT on the Wasatch uplift. Upper part is an unnamed red pebble and cobble conglomerate of brown-weathering calcareous sandstone that averages about 300 ft thick in the Logan quad. Fossil gastropod PHYSA BRIDGENESIS MEEK and PLANORBIS sp. indet. identified. Assigned a Paleocene or early Eocene age. Geologic map.

Summary of Citation: Wasatch

Publication:
Donavan, J.H., 1950, Intertonguing of Green River and Wasatch
   formations in part of Sublette and Lincoln Counties, Wyoming:
   Wyoming Geological Association Field Conference Guidebook,
   no. 5, p. 59-67

Usage in Publication:
Wasatch formation

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Greater Green River basin

Summary:
Divided in south-central Sublette Co, WY in the Greater Green River basin into the Knight member and the newly named New Fork tongue. The Knight is separated from the New Fork by the newly named Fontenelle member of the Green River in the vicinity of the Green River-New Fork River junction. The New Fork pinches out in the basin east of the Green River. Cross section. Geologic map. Of middle Eocene age.

Summary of Citation: Wasatch

Publication:
Love, J.D. and Weitz, J.L., 1951, Geologic map of the Powder
   River basin and adjacent areas, Wyoming: U.S. Geological
   Survey Oil and Gas Investigations Map, OM-122, 1 sheet, scale
   1:316,800

Usage in Publication:
Wasatch formation*

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Powder River basin

Summary:
Revised in that Wasatch formation divided into the Kingsbury member (formerly designated Kingsbury conglomerate member) at base and Moncrief member (formerly Moncrief gravel) at top, on the west side of the Powder River basin from area around North Fork Crazy Woman Creek, Johnson Co, north to T54N, R85W, Sheridan Co, WY. Elsewhere on map Wasatch mapped as an undivided unit. Overlies Tongue River member of Fort Union formation. Underlies White River formation. Of Eocene age. [No explanation for nomenclature changes.]

Summary of Citation: Wasatch

Publication:
Pipiringos, G.N., 1955, Tertiary rocks in the central part of
   the Great Divide basin, Sweetwater County, Wyoming, IN Camp,
   R.J., chairman, Green River basin: Wyoming Geological
   Association Field Conference Guidebook, no. 10, p. 100-104

Usage in Publication:
Wasatch formation*

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Greater Green River basin

Summary:
Revised in that Wasatch formation in the Great Divide basin, Sweetwater Co, WY in the Greater Green River basin, divided into the lower Eocene Red Desert tongue (new) and Niland tongue (new), and the middle Eocene Cathedral Bluffs tongue. The Red Desert is separated from the Niland by the Luman tongue (new) of the Green River Formation. The Niland is separated from the Cathedral Bluffs by the Tipton tongue of the Green River. The Cathedral Bluffs is overlain by the Laney shale member of the Green River near Laney Rim and by its equivalent, the Morrow Creek Member of the Green River, south of Cyclone Rim. Units of the Wasatch and Green River intertongue with the Battle Spring formation (new) of the Cyclone Rim area. The Battle Spring is a coarse-grained to pebbly arkosic sandstone that intertongues with and is equivalent to both the Green River and Wasatch formations in this area. Is a fluviatile and paludal deposit. Unconformably overlies Fort Union formation. Cross section.

Summary of Citation: Wasatch

Publication:
Hose, R.K., 1955, Geology of the Crazy Woman Creek area, Johnson
   County, Wyoming, IN Contributions to economic geology, 1955:
   U.S. Geological Survey Bulletin, 1027-B, p. B33-B118

Usage in Publication:
Wasatch formation*

Modifications:	Geologic Province:	Dominant Lithology:
Overview	Powder River basin

Summary:
Kingsbury conglomerate member, basal member of Wasatch formation, mapped between Kingsbury Ridge south to T48N, R82W. Farther south Kingsbury grades into a lower finer grained part of the undivided Wasatch. The upper part of Wasatch, called Moncrief member north of Kingsbury Ridge, also grades south into fine-grained rocks that are assigned to the undivided Wasatch. Vertebrate fossils (HYOPSODUS) found in upper 50 ft of Wasatch in report area. Geologic map. Eocene age.

Summary of Citation: Wasatch

Publication:
Oriel, S.S., 1961, Tongues of the Wasatch and Green River
   formations, Fort Hill area, Wyoming, IN Geological Survey
   research 1961; short papers in the geologic and hydrologic
   sciences; Articles 1-146: U.S. Geological Survey Professional
   Paper, 424-B, p. B151-B152

Usage in Publication:
Wasatch formation*

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Greater Green River basin

Summary:
Divided into the main body, New Fork tongue (revised), and upper tongue in the Fort Hall area, Lincoln Co, WY in the Greater Green River basin. The New Fork as revised includes about 250 ft of green, not red, mudstone and numerous lenses of yellow, buff, and brown, very fine to medium grained sandstone that were assigned by Donovan (1950) to the underlying Fontenelle tongue of the Green River formation. Of early Eocene age.

Summary of Citation: Wasatch

Publication:
Donnell, J.R., 1961, Tertiary geology and oil-shale resources
   of the Piceance Creek basin between the Colorado and White
   Rivers, IN Contributions to economic geology, 1958: U.S.
   Geological Survey Bulletin, 1082-L, p. L835-L891, Also, U.S.
   Geological Survey Bulletin 1042-H, p. H255-H271, and U.S.
   Geological Survey Oil and Gas Investigations Map OM-134,
   scale 1:62,500.

Usage in Publication:
Wasatch formation*

Modifications:	Geologic Province:	Dominant Lithology:
Revised Overview	Piceance basin

Summary:
Crops out almost continuously around basin margins. Upper contact revised in that Wasatch formation underlies the newly named Anvil Points member of Green River formation along the east side of the Piceance basin from Parachute Creek valley in Garfield Co north beyond mouth of Piceance Creek in Rio Blanco Co. The contact is one of red shale (Wasatch) with gray shale (Anvil Points). Contact generally represents a change from irregularly bedded, brightly colored rocks (Wasatch) to regularly bedded, non-red rocks (Green River). Beyond Piceance Creek to west, Wasatch is in contact with the Garden Gulch member of Green River as far as Fletcher Gulch, Rio Blanco Co. For the remainder of the mapped area on the west side along the Cathedral Cliffs, the Douglas Creek member, which underlies the Garden Gulch, is in contact with the Wasatch. Greatest reported thickness is 5,500 ft in the subsurface of report area. Divisible into three parts due to presence of a cliff-forming sandstone 700 ft above base. Consists mostly of red, purple, gray, green, lavender, and yellow clay and shale, and some lenticular sandstone and conglomerate. Of Eocene age. Geologic map; cross sections.

Summary of Citation: Wasatch

Publication:
Oriel, S.S., 1962, Main body of the Wasatch Formation near La
   Barge, Wyoming: American Association of Petroleum Geologists
   Bulletin, v. 46, no. 12, p. 2161-2173

Usage in Publication:
Wasatch Formation*

Modifications:	Geologic Province:	Dominant Lithology:
Revised Age modified	Greater Green River basin

Summary:
Divided in the Greater Green River basin of southwest WY into: Chappo Member, of very late Paleocene and earliest Eocene age; a newly named unit at base, La Barge Member of late early Eocene; a newly named unit above Chappo; and a conglomerate member, a peripheral facies deposited on the west side of the basin. Age changed from Eocene to Paleocene and Eocene. These 3 units were formerly designated main body of Wasatch. Conglomerate member is a dark-brown and brick-red interbedded diamictite, conglomerate, sandstone, and mudstone unit. Some blocks in the conglomerate are up to 7 ft long. Fragments in the conglomerate member derived from Madison, Phosphoria, Twin Creek, Thaynes, Nugget, Ankareh and Wells Formations and from some Cretaceous units. Mapped from Slate Creek to north of La Barge. Is at least 1,000 ft thick; may be several thousand ft thick. Of early Eocene age. These strata were assigned to Almy (Paleocene) and Knight (Eocene) Formations by Veatch (1907). Neither Almy nor Knight are considered useful terms in the report area [though neither was abandoned in the report].

Summary of Citation: Wasatch

Publication:
Ritzma, H.R., 1965, Piceance Creek Sandstone, basal Green River
   sandstone tongue, northeast Piceance Creek basin, Colorado:
   The Mountain Geologist, v. 2, no. 3, p. 103-107

Usage in Publication:
Wasatch Formation

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Piceance basin Greater Green River basin

Summary:
Revised in that the Eocene Wasatch Formation underlies the newly named tongue, Piceance Creek Sandstone Tongue, of the Anvil Points Member of the Green River Formation. New sandstone tongue recognized (areal extent map) on east side of Piceance basin in Garfield and Rio Blanco Cos, CO, and north into the Gray Hills area of Moffat Co, CO in the Greater Green River basin. Farther eastward in the basin Piceance Creek is replaced by the Anvil Points. Westward the Wasatch is overlain by the Douglas Creek Member of the Green River. Rocks assigned to the Piceance Creek in this report were assigned to the Douglas Creek in earlier report. Nomenclature change necessary because Douglas Creek derived from a western and southwestern source, whereas Anvil Points and Piceance Creek had an eastern source. Cross section.

Summary of Citation: Wasatch

Publication:
Roehler, H.W., 1965, Early Tertiary depositional environments
   in the Rock Springs uplift area, IN De Voto, R.H., and Bitter,
   R.K., eds., Sedimentation of Late Cretaceous and Tertiary
   outcrops, Rock Springs uplift: Wyoming Geological Association
   Field Conference Guidebook, no. 19, p. 140-150

Usage in Publication:
Wasatch Formation

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Greater Green River basin

Summary:
Revised in that Nightingale Member assigned as lowermost member of Wasatch. Study area is in area of Rock Springs uplift, Greater Green River basin, WY. Wasatch consists of (ascending): Nightingale Member, Niland Tongue, and Cathedral Bluffs Tongue. Assigns [informal] "Fire Hole Sandstone Facies" to main body of Wasatch in northern part of T15N, R105W, Sweetwater Co. Fire Hole consists of fluviatile red beds. Chart showing previous nomenclature; restored section. Eocene age.

Summary of Citation: Wasatch

Publication:
Schneider, M.C., 1967, Early Tertiary continental sediments of
   central and south-central Utah: Brigham Young University
   Geology Studies, v. 14, p. 143-194

Usage in Publication:
Wasatch Formation

Modifications:	Geologic Province:	Dominant Lithology:
Not used

Summary:
Not used in southern High Plateaus of south-central UT including Cedar Breaks National Park [Monument], Iron Co [Great Basin province] and Bryce Canyon National Park and along margins of Table Cliff Plateau, Garfield and Kane Cos [Paradox basin and Plateau sedimentary province]. Rocks previously referred to as Wasatch are assigned to newly named Cedar Breaks Formation. Rocks are older than, of different lithology than, and far removed from type Wasatch of WY.

Summary of Citation: Wasatch

Publication:
Donnell, J.R., 1969, Paleocene and lower Eocene units in the
   southern part of the Piceance Creek basin Colorado, IN
   Contributions to stratigraphy, 1968: U.S. Geological Survey
   Bulletin, 1274-M, p. M1-M18

Usage in Publication:
Wasatch Formation*

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Piceance basin

Summary:
Divided into newly named Atwell Gulch Member (Paleocene and Eocene) at base, Molina Member (Eocene), and Shire Member (Eocene) at top in southern Piceance basin. These members had been called the lower, middle and upper members of the Wasatch in earlier reports.

Summary of Citation: Wasatch

Publication:
Oriel, S.S. and Tracey, J.I., Jr., 1970, Uppermost Cretaceous
   and Tertiary stratigraphy of Fossil basin, southwestern
   Wyoming: U.S. Geological Survey Professional Paper, 635, 53
   p.

Usage in Publication:
Wasatch Formation*

Modifications:	Geologic Province:	Dominant Lithology:
Revised Overview	Greater Green River basin

Summary:
Used in Fossil basin of Greater Green River basin as defined by Veatch (1907) but subdivided into seven mappable lithologic facies: 1) a local unnamed basal pebble-to-boulder conglomerate member; 2) local lower member; 3) main body; 4) sandstone tongue; 5) mudstone tongue; 6) Bullpen Member (new), at top; and 7) Tunp Member (new) that is at the periphery of the Fossil basin and is equivalent to the members 2-6 in listing. Exposed in much of basin. Includes beds mapped as Almy and Knight by Veatch. Ranges from 1,000 to 2,000 ft thick. Measured sections. Overlies Evanston Formation. Underlies Fowkes Formation. Intertongues with Fossil Butte and Angelo Members, both new, of Green River Formation. Basal and upper parts undated. Assigned to the early Eocene. Fossil charophytes, pollen and spores, ostracods, gastropods, snail, and vertebrates identified. Mostly of alluvial origin but parts are the result of residual weathering, mudflow, rock slide, or deposited in a lake.

Summary of Citation: Wasatch

Publication:
Mullens, T.E., 1971, Reconnaissance study of the Wasatch,
   Evanston, and Echo Canyon Formations in part of northern
   Utah, IN Contributions to general geology, 1969: U.S. Geological
   Survey Bulletin, 1311-D, p. D1-D31

Usage in Publication:
Wasatch Formation*

Modifications:	Geologic Province:	Dominant Lithology:
Areal limits Overview	Uinta uplift Wasatch uplift

Summary:
Name Wasatch applied to rocks above Evanston Formation in lower Echo Canyon area, Summit Co, UT, Uinta uplift, in East Canyon Reservoir and lower Lost Creek, Morgan Co, UT, Wasatch uplift. These rocks have been assigned to upper part of Knight and upper part of Almy Formations by earlier workers. Is about 3,000 ft thick in area. Unconformably underlies Norwood Tuff. Westward from where Wasatch was named the thickness and conglomerate content increase, the variegated mudstone changes to reddish-brown mudstone, and a few silty pale-red limestone and gray algal limestone beds occur. Most persistent property of the Wasatch is its reddish-brown color. A basal conglomerate along west side of Lost Creek, northeast of Croyden, Morgan Co, has clasts of Cambrian and Precambrian quartzite, Weber Quartzite, Paleozoic and Mesozoic that range from a few inches to 15 ft in diameter. The range in clast size suggest this basal conglomerate may be similar to diamictite in Wasatch about 30 mi northeast. Conglomerate (one of rounded quartz clasts and one of poorly sorted angular dolomite, limestone, shale, and sandstone fragments) above the basal conglomerate is interbedded with sandstone and mudstone. Discusses other lithologic variations. Only fossils found in northeast UT are land and freshwater gastropods and not from basal Wasatch. Of Paleocene and Eocene age. Geologic map; correlation chart.

Summary of Citation: Wasatch

Publication:
Bowers, W.E., 1972, The Canaan Peak, Pine Hollow, and Wasatch
   Formations in the Table Cliff region, Garfield County, Utah,
   IN Contributions to general geology: U.S. Geological Survey
   Bulletin, 1331-B, p. B1-B39

Usage in Publication:
Wasatch Formation*

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Paradox basin

Summary:
Restricted in Paradox basin part of report area to beds that unconformably overlie the Pine Hollow Formation and underlie the unnamed Oligocene? white tuffaceous sandstone. Formerly included rocks newly named Pine Hollow and the older Canaan Peak Formation. Divided into pink limestone member, at base of Paleocene and early Eocene age, white limestone member of early or middle Eocene age, and variegated sandstone member of Eocene age. Fresh-water mollusks of early to middle Eocene age found in white limestone member.

Summary of Citation: Wasatch

Publication:
Tschudy, R.H., 1976, Pollen changes near the Fort Union-Wasatch
   boundary, Powder River basin, IN Geology and energy resources
   of the Powder River [basin]: Wyoming Geological Association
   Field Conference Guidebook, no. 28, p. 73-81

Usage in Publication:
Wasatch Formation*

Modifications:	Geologic Province:	Dominant Lithology:
Age modified locally Biostratigraphic dating Overview	Powder River basin

Summary:
Fort Union-Wasatch boundary is noted to have been placed at several horizons by various investigators. Present work makes no recommendations regarding placement of Fort Union-Wasatch boundary; rather it presents palynological data pertaining to recognition of Paleocene-Eocene boundary. Palynological data is presented in framework of the principal coal beds of study interval exposed in Sheridan, Campbell, and Converse Cos, WY in Powder River basin. Presents additional data from Delson's (1971) vertebrate quarries in Johnson Co, WY; Holmes coal, Big Horn Co, MT; and Golden Valley Formation, Mercer and Dunn Cos, ND. Three pollen assemblage zones are recognizable in interval from Wall coal zone up to Scott coal zone: zone X (Paleocene) includes Wall, Canyon, Anderson (Wyodak), and Smith coals; zone Y (younger Paleocene) includes Arvada coal strata at least as high as 100 ft below Felix coal; and zone Z (Eocene) includes Felix coal and strata at least as high as 79 ft below Scott coal. Both vertebrate and palynological data indicate that faunal and floral changes do not coincide with Fort Union-Wasatch formational contact. About the lower 300 ft of Wasatch is Paleocene in vicinity of Delson's vertebrate quarries. Biostratigraphic dating based on palynological evidence suggests that Paleocene-Eocene boundary in Powder River basin can be reasonably defined by first appearance of PLATYCARYA group pollen flora (zone Z assemblage).

Summary of Citation: Wasatch

Publication:
Fouch, T.D., 1976, Revision of the lower part of the Tertiary
   system in the central and western Uinta basin, Utah, IN
   Contributions to stratigraphy: U.S. Geological Survey Bulletin,
   1405-C, p. C1-C7

Usage in Publication:
Wasatch Formation*

Modifications:	Geologic Province:	Dominant Lithology:
Areal limits	Uinta basin

Summary:
Retained in northern Uinta basin subsurface where Flagstaff Member (reduced in stratigraphic rank from formation to member in subsurface) of Green River Formation does not separate Colton and North Horn Formations into two units. Includes predominantly red, gray, green and variegated sandstone, conglomerate, mudstone, and minor, discontinuous carbonate beds between the Price River Formation and the Colton Formation. At northernmost limit probably unconformably overlain by Uinta Formation. Is of Paleocene and Eocene age.

Summary of Citation: Wasatch

Publication:
Dorr, J.A., Spearing, D.R. and Steidtmann, J.R., 1977, Deformation
   and deposition between a foreland uplift and an impinging
   thrust belt; Hoback basin, Wyoming: Geological Society of
   America Special Paper, 177, 82 p., (incl. geologic map, scale
   1:90,000)

Usage in Publication:
Wasatch Formation

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Greater Green River basin Yellowstone province

Summary:
Divided in the report area, Sublette and Teton Cos, Greater Green River basin and Yellowstone province, respectively, WY into Chappo Member and Lookout Mountain Conglomerate Member (new). The rocks assigned to the Chappo in this report were identified as part of the Hoback Formation in earlier reports. Rocks assigned to the newly named Lookout Mountain were assigned to the Pass Peak Formation in earlier reports. Geologic maps. Fence diagram. Chappo is about 600 m thick. Lookout Mountain is at least 600 m thick. Wasatch overlies and intertongues with the Hoback. Both members intertongue with, and locally Chappo underlies, the Pass Peak. The Lookout Mountain is not overlain by younger sediments. Of earliest Eocene age.

Summary of Citation: Wasatch

Publication:
Law, B.E., 1978, Geologic map and coal deposits of the Gillette
   West quadrangle, Campbell County, Wyoming: U.S. Geological
   Survey Miscellaneous Field Studies Map, MF-974, 2 sheets,
   scale 1:24,000

Usage in Publication:
Wasatch Formation*

Modifications:	Geologic Province:	Dominant Lithology:
Age modified	Powder River basin

Summary:
Age modified to Paleocene and Eocene in Campbell Co, WY, Powder River basin. Wasatch divided into three informal units. Lower unit: lower contact not exposed, however, on geophysical logs and in adjacent Gillette East quad is mapped at top of Wyodak coal; 100-200 ft thick; and is in Paleocene Y palynological zone of Tschudy (1976). Middle unit: lower contact is unconformable with lower unit and is mapped at base of medium- to very coarse-grained sandstone; 200-350 ft thick; and is in Paleocene Y palynological zone of Tschudy. Upper unit: lower contact is at top of medium- to coarse-grained sandstone 0-20 ft below Felix coal bed but is mapped coincident with base of Felix; 450 ft is exposed in quad; and is in Eocene Z palynological zone of Tschudy.

Summary of Citation: Wasatch

Publication:
Sullivan, Raymond, 1980, A stratigraphic evaluation of the Eocene
   rocks of southwestern Wyoming: Wyoming Geological Survey
   Report of Investigations, no. 20, 50 p.

Usage in Publication:
Wasatch Formation

Modifications:	Geologic Province:	Dominant Lithology:
Revised Overview	Greater Green River basin

Summary:
A unit formerly called upper tongue of Wasatch Formation named Desertion Point Tongue of Wasatch along the western margin of Green River basin. The formation is also in the Hoback, Great Divide, and Washakie basins which with Green River basin comprise Greater Green River basin. The surrounding basin margins were the main sediment source. Divisible into redbed fluviatile, pediment, and non-red fluviatile-paludal facies. Separated into Niland, New Fork, Cathedral Bluffs, and Desertion Point Tongues, and the main body. Intertongues with Green River Formation. Intertongues and underlies Bridger Formation. Deposited on an alluvial plain. The variegated red color and the lack of volcanic sediments in Wasatch separate it from Bridger.

Summary of Citation: Wasatch

Publication:
Denson, N.M., Dover, J.H. and Osmonson, L.M., 1980, Lower Tertiary
   coal bed distribution and coal resources of the Reno
   Junction-Antelope Creek area, Campbell, Converse, Niobrara,
   and Weston Counties, Wyoming: U.S. Geological Survey
   Miscellaneous Investigations Series Map, I-1201, 1 sheet,
   scale 1:125,000, Supersedes U.S. Geological Survey Miscellaneous
   Investigations Series Map MF-960.

Usage in Publication:
Wasatch Formation*

Modifications:	Geologic Province:	Dominant Lithology:
Overview	Powder River basin

Summary:
Is formation in the Reno Junction-Antelope Creek area--Campbell, Converse, Niobrara, and Weston Cos, WY in the southern Powder River basin. Fort Union-Wasatch contact (tentatively interpreted as an unconformity) is shown on fence diagram and geologic map. Samples taken randomly across the unconformity proposed to mark the Fort Union-Wasatch contact have two distinct heavy mineral assemblages. Heavy minerals from rocks mapped as Fort Union contain abundant zircon and tourmaline; rocks assigned to Wasatch are rich in garnet, epidote, and biotite. Mapping shows that the contact between these two groups of rocks, each with its own diagnostic heavy mineral signature, changes stratigraphic position across the area more abruptly than can be explained readily by assumed facies changes. Contact lies on or close to top of Wyodak coal bed in most of the study area, but climbs to at least 200 ft above the Wyodak and Anderson coal beds in southeastern part of area. Age is Eocene.

Summary of Citation: Wasatch

Publication:
Johnson, R.B., 1984, New names for units in the lower part of
   the Green River Formation, Piceance Creek basin, Colorado,
   IN Contributions to stratigraphy: U.S. Geological Survey
   Bulletin, 1529-I, p. I1-I20, (incl. geologic map, scale
   1:600,000)

Usage in Publication:
Wasatch Formation*

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Piceance basin

Summary:
Section 63+ m thick in Long Point quad, formerly called Shire Member of Wasatch Formation assigned to Cow Ridge Member (new) of Green River Formation. Underlies the newly named Long Point Bed of the Garden Gulch, or of the Anvil Points, or of the Douglas Creek Members of the Green River Formation. Remains an Eocene unit.

Summary of Citation: Wasatch

Publication:
Franczyk, K.J. and Pitman, J.K., 1987, Basal Tertiary conglomerate
   sequence, southeastern Uinta basin, Utah; a preliminary
   report, IN Campbell, J.A., ed., Geology of Cataract Canyon
   and vicinity 1987; field symposium: Four Corners Geological
   Society Field Conference Guidebook, 10th Field Conference,
   Durango, CO, May 14-17, 1987, p. 119-125

Usage in Publication:
Wasatch Formation*

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Paradox basin Piceance basin

Summary:
A matrix-supported quartz-pebble conglomerate, conglomeratic sandstone, and sandstone called the Dark Canyon sequence, is recognized at the base of the Wasatch from about 10 mi east of the Green River, Grand Co, UT, Paradox basin, east to Douglas Pass, Garfield Co, Piceance basin [in the Uinta basin of authors]. Sequence ranges 60 to 100 ft thick in west part of area; east of Westwater Canyon in Grand Co, it is 25 to 35 ft thick at most localities. Sequence unconformably overlies Cretaceous rocks. The unconformity represents as much as 15 m.y. The sequence is overlain by main body of Wasatch in its western outcrop area. West of the Green River, the North Horn Formation and Flagstaff Limestone are equivalent to part of the main body. Wasatch is thinner and younger east indicating onlap onto the Douglas Creek arch. The decrease in grain size vertically and from east to west in the Dark Canyon indicates decreasing flow strength through time and in that direction. Dark Canyon could be middle Paleocene age; main body is Eocene age.

Summary of Citation: Wasatch

Publication:
Kirschbaum, M.A. and Nelson, S.N., 1988, Geologic history and
   palynological dating of Paleocene deposits, western Rock
   Springs uplift, Sweetwater County, Wyoming: University of
   Wyoming Contributions to Geology, v. 26, no. 1, p. 21-28

Usage in Publication:
Wasatch Formation*

Modifications:	Geologic Province:	Dominant Lithology:
Overview	Greater Green River basin

Summary:
Lower part of Wasatch Formation as mapped in Rock Springs uplift area, Greater Green River basin in WY, is Paleocene. No lithologic break observed between the Wasatch and underlying Fort Union Formation. Both formations deposited in an alluvial environment. Wasatch is organic-poor with less coal and mostly green mudstone and clastics, whereas Fort Union is organic-rich with coal, carbonaceous shale and gray to brown clastics. Upper palynomorph zone P6 of Paleocene age not observed. No Eocene pollen observed.

Summary of Citation: Wasatch

Publication:
Honey, J.G. and Hettinger, R.D., 1989, Cross section showing
   correlations of Upper Cretaceous Fox Hills Sandstone and
   Lance Formation, and lower Tertiary Fort Union and Wasatch
   formations, southeastern Washakie basin, Wyoming, and eastern
   Sand Wash basin, Colorado: U.S. Geological Survey Miscellaneous
   Investigations Series Map, I-1964, 1 sheet

Usage in Publication:
Wasatch Formation*

Modifications:	Geologic Province:	Dominant Lithology:
Revised Overview	Greater Green River basin

Summary:
Unconformably overlies unnamed upper Paleocene unit in area along eastern flank of Washakie basin, and southeastern flank of Great Divide basin, Carbon and Sweetwater Cos, WY in Greater Green River basin. Subsurface correlation studies by other workers have placed unnamed upper Paleocene unit in Wasatch Formation, and have assumed an Eocene age for it. Base of main body of Wasatch near Baggs, WY probably no younger than early early Eocene (early Wasatchian), and upper part of main body is late early Eocene (late Wasatchian) based on fossil vertebrates. Geologic map. Measured sections. Correlation diagram. Fossil list.

Summary of Citation: Wasatch

Publication:
Bryant, B.H., 1990, Geologic map of the Salt Lake City 30' x
   60' quadrangle, north-central Utah, and Uinta County, Wyoming,
   with a section on palynologic data from Cretaceous and lower
   Tertiary rocks in the Salt Lake City 30' x 60' quadrangle by
   D.J. Nichols and B.H. Bryant: U.S. Geological Survey
   Miscellaneous Investigations Series Map, I-1944, 1 sheet,
   scale 1:100,000

Usage in Publication:
Wasatch Formation*

Modifications:	Geologic Province:	Dominant Lithology:
Biostratigraphic dating	Uinta uplift

Summary:
The lower 200-300 m of the Wasatch Formation contains palynomorphs of zones P5 and P6 of Paleocene age. The pollen were recovered in 3 localities in Summit Co, UT on the Uinta uplift. Is about 1,500 m thick in the Mountain Dell-Porterville area and about 1,200 m thick north of the Uinta Mountains.

Summary of Citation: Wasatch

Publication:
Scott, R.W., Jr. and Pantea, M.P., 1990, Geologic map of the
   Texas Creek quadrangle, Rio Blanco County, Colorado: U.S.
   Geological Survey Miscellaneous Field Studies Map, MF-2134,
   1 sheet, scale

Usage in Publication:
Wasatch Formation*

Modifications:	Geologic Province:	Dominant Lithology:
Biostratigraphic dating	Piceance basin

Summary:
Pollen (genera MOMIPITES and CARYAPOLLENITIES) recovered near Cretaceous-Tertiary unconformity in NW sec 13, T3S, R103W (USGS paleobotany location D5237-C) indicates late Paleocene age for base of Wasatch (D.J. Nichols, written communication, 1987).

Summary of Citation: Wasatch

Publication:
Franczyk, K.J., Pitman, J.K. and Nichols, D.J., 1990, Sedimentology,
   mineralogy, palynology, and depositional history of some
   uppermost Cretaceous and lowermost Tertiary rocks along the
   Utah Book and Roan cliffs east of the Green River, IN Evolution
   of sedimentary basins; Uinta and Piceance basins: U.S.
   Geological Survey Bulletin, 1787-N, p. N1-N27

Usage in Publication:
Wasatch Formation*

Modifications:	Geologic Province:	Dominant Lithology:
Biostratigraphic dating	Paradox basin

Summary:
Two divisions of Wasatch described--Dark Canyon sequence and main body. Presence of pollen species MOMIPITES WALTMANENSIS indicates an early but not earliest Paleocene age for the Dark Canyon sequence at the base of the Wasatch. Age of late early Paleocene assigned to Dark Canyon. A hiatus of 6? m.y. during which erosion and nondeposition occurred may separate Dark Canyon from the main body. In Dark Canyon CARYAPOLLENITES VERIPITES, the pollen species, indicates a late Paleocene age for the basal part of the main body. Upper Eocene part of main body not studied. Western pinchout of the Dark Canyon is about 10 mi east of the Green River, and it thickens rapidly eastward to 150 ft in less than 15 mi. East of Westwater Canyon in Grand Co, UT, the sequence thins and is rarely more than 25 to 35 ft thick. Isolated remnants of the Dark Canyon are present near the CO-UT line. The main body thins and is younger from east to west. Measured sections; correlation chart. Area studied includes the Tuscher, Sego, and Cottonwood Canyons, and Bitter Creek, Grand Co, UT in the Paradox basin.

Summary of Citation: Wasatch

Publication:
Denson, N.M., Macke, D.L. and Schumann, R.R., 1990, Geologic
   map and distribution of heavy minerals in Tertiary rocks of
   the Sheridan 30' x 60' quadrangle, Wyoming and Montana: U.S.
   Geological Survey Miscellaneous Investigations Series Map,
   I-2020, 1 sheet, scale 1:100,000

Usage in Publication:
Wasatch Formation*

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Powder River basin

Summary:
Is formation mapped in Johnson, Sheridan, and Campbell Cos, WY and Big Horn and Powder River Cos, MT in Powder River basin. Main body of Wasatch overlies Kingsbury Conglomerate Member of Wasatch along the mountain front; elsewhere it unconformably overlies Tongue River Member (revised) of the Fort Union Formation (revised). Wasatch is distinguished from Fort Union on basis of: 1) sandstone of the Wasatch is coarser grained and has broader grain size variation than the Fort Union; 2) characteristically weathers buff to tan, while Fort Union varies from light gray to somber shades of gray; 3) brown-weathering, calcareous, iron-rich, cauliflower shaped concretions are most common in the Fort Union, and are generally absent from the Wasatch; 4) heavy minerals in the Wasatch are dominated by sphene, epidote, and garnet in contrast to tourmaline and a pinkish-violet variety of zircon in the Fort Union, and 5) minor accessory minerals in the Wasatch are apatite, epidote, and biotite compared to chloritoid, staurolite, and rutile in the Fort Union. For purposes of this map (and others in same series), the lower contact of the Wasatch is revised downward 200-300 ft from that of most previous mappers in the basin. Strata below the top of Baker's (1929) Roland coal bed are referred to as lower part of Wasatch, while strata above it are called upper part. Authors think the age may only be Eocene. [No age change is considered on basis of this report.]

Summary of Citation: Wasatch

Publication:
Hail, W.J., Jr., 1990, Geology of the lower Yellow Creek area,
   northwestern Colorado, IN Evolution of sedimentary basins;
   Uinta and Piceance basins: U.S. Geological Survey Bulletin,
   1787-O, p. O1-O45

Usage in Publication:
Wasatch Formation*

Modifications:	Geologic Province:	Dominant Lithology:
Biostratigraphic dating	Piceance basin

Summary:
Biostratigraphic dating based on fossil palynomorphs for USGS paleobotany locality D4626--about 60 ft below top of dark shale facies (middle part of Wasatch)--indicate an Eocene age. Palynomorphs from locality D4636--just above base of formation--indicate a late Paleocene age. Palynomorphs from locality D4775--about 80 ft above base of formation--indicate latest Paleocene age. Fossil list. Fossil localities are in Rio Blanco Co, CO in Piceance basin. Same author, in previous studies (GQ-1131, 1973 and GQ-1195, 1974) assigned same ages as above to formation; however, fossils not listed.

Summary of Citation: Wasatch

Publication:
Roehler, H.W., 1991, Revised stratigraphic nomenclature for the
   Wasatch and Green River Formations, IN Geology of the Eocene
   Wasatch, Green River, and Bridger (Washakie) formations,
   greater Green River basin, Wyoming, Utah, and Colorado: U.S.
   Geological Survey Professional Paper, 1506-B, p. B1-B38

Usage in Publication:
Wasatch formation*

Modifications:	Geologic Province:	Dominant Lithology:
Revised	Greater Green River basin

Summary:
Alkali Creek Tongue of Wasatch Formation named. At its type in the western part of Greater Green River basin, Alkali Creek overlies Farson Sandstone Member (new) of Green River Formation and underlies Wilkins Peak Member of Green River. Rocks called Alkali Creek were assigned to New Fork Tongue of Wasatch in earlier reports. New Fork Tongue not used. To north where Wilkins Peak is missing, Alkali Creek overlain by Cathedral Bluffs Tongue of Wasatch. Cathedral Bluffs extended to western Greater Green River basin replacing use of Desertion Point Tongue of Wasatch. Wasatch is assigned an early and middle Eocene age; LAMBDOTHERIUM was found 95 ft below top of main body in sec 25, T24N, R101W; NOTHARCTUS was found 42 ft above base of Cathedral Bluffs Tongue in sec 25, T25N, R102W; HYRACOTHERIUM found near Cathedral Bluffs-Wilkins Peak contact in sec 24, T12N, R99W; these fossils are early Eocene perissodactyle. Stratigraphic diagrams.

Summary of Citation: Wasatch

Publication:
Roehler, H.W., 1992, Correlation, composition, areal distribution,
   and thickness of Eocene stratigraphic units, greater Green
   River basin, Wyoming, Utah, and Colorado, IN Geology of the
   Eocene Wasatch, Green River, and Bridger (Washakie) formations,
   greater Green River basin, Wyoming, Utah, and Colorado: U.S.
   Geological Survey Professional Paper, 1506-E, p. E1-E49,
   (incl. geologic map, scale 1:500,000)

Usage in Publication:
Wasatch Formation*

Modifications:	Geologic Province:	Dominant Lithology:
Areal limits Overview	Greater Green River basin

Summary:
Isopach maps of main body, Ramsey Ranch Member (revised), and Niland, Alkali Creek, and Cathedral Bluffs Tongues of Wasatch within Greater Green River basin, WY and CO. Main body deposited throughout basin; thickness ranges from 1,000 to 9,000 ft. Ramsey Ranch reassigned from Green River Formation to Wasatch; occurs within upper part of main body. Ramsey Ranch deposited in Uinta Mountain trough and on east side of Rock Springs uplift; maximum thickness is 800 ft near center of Washakie basin; thins westward to 400 ft across south part of Rock Springs uplift, then thickens to 600 ft along north flank of Uinta Mountains. Niland is 400 ft thick in southeast part of Green River basin, in southwest part of Washakie basin, and in west part of Sand Wash basin; thins irregularly from these areas to less than 100 ft in northeast Washakie and southeast Great Divide basins and in small areas of southwest Washakie basin. Alkali Creek occurs in northwest part of Green River basin; maximum thickness is 232 ft; thins and merges with main body southward along west margin of Green River basin; intertongues with and is replaced by Farson Sandstone Member of Green River in subsurface in southeastward direction. Cathedral Bluffs ranges in thickness from 0-2000 ft; maximum thickness is near center of Washakie basin and in west Sand Wash basin. Numerous cross sections; stratigraphic chart. Eocene age.

Summary of Citation: Wasatch

Publication:
Hail, W.J., Jr. and Barnum, B.E., 1993, Geologic map of the
   Divide Creek quadrangle, Rio Blanco and Moffat Counties,
   Colorado: U.S. Geological Survey Miscellaneous Field Studies
   Map, MF-2232, 1 sheet, scale

Usage in Publication:
Wasatch Formation*

Modifications:	Geologic Province:	Dominant Lithology:
Biostratigraphic dating Overview	Greater Green River basin Piceance basin

Summary:
Mapped in northwest CO in southern Moffat Co, Greater Green River basin and northern Rio Blanco Co, Piceance basin. Main body of Wasatch consists of claystone, shale, mudstone, and sandstone. Samples from lower part at two localities in Rio Blanco Co contained pollen that yielded Paleocene ages (examination and age determinations made by R. H. Tschudy). Sample D1771, sec 32, T3N, R99W, contained pollen of middle Paleocene age or possibly younger; sample D5049, sec 36, T3N, R100W, contained pollen of definite middle Paleocene age, probably early middle Paleocene. Upper part of Wasatch is Eocene age. Wasatch is about 600 ft thick in western part of quad and up to 1700 ft thick in eastern part of quad; lower (Paleocene) part ranges from less than 250-480 ft thick.

Summary of Citation: Wasatch

Publication:
Roehler, H.W., 1993, Eocene climates, depositional environments,
   and geography, greater Green River basin, Wyoming, Utah, and
   Colorado, IN Geology of the Eocene Wasatch, Green River, and
   Bridger (Washakie) formations, greater Green River basin,
   Wyoming, Utah, and Colorado: U.S. Geological Survey Professional
   Paper, 1506-F, p. F1-F74

Usage in Publication:
Wasatch Formation*

Modifications:	Geologic Province:	Dominant Lithology:
Overview	Greater Green River basin

Summary:
Paleogeographic map (fig. 42) of middle part of main body of Wasatch and associated formations (Pass Peak and Battle Spring Formations) showing depositional environments in Greater Green River basin. Consists of red flood-plain deposits around margins of Greater Green River basin and gray and green flood-plain deposits in central part of basin. Underlies Ramsey Ranch Member of Wasatch; oldest unit studied. Generalized stratigraphic correlation chart (fig. 41). Geologic map (fig. 1) of Vermilion Creek area, northwest CO. Eocene age.