Identification_Information: Citation: Citation_Information: Originator: McLaughlin, R.J. Originator: Sarna-Wojcicki, A.M. Originator: Fleck, R.J. Originator: Langenheim, V.E. Originator: McCabe, C.A. Originator: Wan, Elmira Publication_Date: 01-11-08 Title: Geologic and Geophysical Framework of the Santa Rosa 7.5'Quadrangle, Sonoma County, California Edition: 1.0 Geospatial_Data_Presentation_Form: vector digital data Online_Linkage: http://pubs.usgs.gov/of/2008/1009 Description: Abstract: This digital map database, compiled from previously published and unpublished data, and new mapping by the authors, represents the general distribution of bedrock and surficial deposits of the Santa Rosa 7.5-minute quadrangle. The database delineates map units that are identified by general age and lithology following the stratigraphic nomenclature of the U.S. Geological Survey. The scale of the source maps limits the spatial resolution (scale) of the database to 1:24,000 or smaller. Purpose: This database and accompanying plot files depict the distribution of geologic materials and structures at a regional (1:24,000) scale. The report is intended to provide geologic information for the regional study of materials properties, earthquake shaking, landslide potential, mineral hazards, seismic velocity, and earthquake faults. In addition, the report contains new information and interpretations about the regional geologic history and framework. However, the regional scale of this report does not provide sufficient detail for site development purposes. Supplemental_Information: DIGITAL COMPILATION-Several different feature classes were generated within a geodatabase during the construction of the Santa Rosa quadrangle geologic map. The topographic base map remains as a digital raster graphic (DRG) and is overlain on the geology feature class in ArcMap at a 60% transparency level. Some custom menus were used to project, transform, edit, tag, and build points in the map. A digital layout or map collar was made with Adobe Illustrator. The map was exported from the layout view in ArcMap as an Adobe Illustrator file and added to a single Adobe Illustrator file that also contained the description of map units, correlation of map units, cross sections, and an index map. Differences between the maps as they appear in the final map sheet and as they appear in the either the .mxd or .pmf files represent changes made in the Adobe Illustrator file to the symbology only and do not reflect any changes in the actual source data. The map is in UTM projection, zone 10, meters, and 1:24,000 scale. The explanatory pamphlet was saved to PDF from Microsoft Word. BASE MAP-The base map for the digital compilation is a Digital Raster Graphic (DRG) of the U.S. Geological Survey, 1:24,000-scale topographic map of the Santa Rosa 7.5' quadrangle (1980), which has a 20-foot contour interval. The image inside the map neatline is georeferenced to the Universal Transverse Mercator projection, zone 10. The horizontal positional accuracy and datum of the DRG matches the accuracy and datum of the source map. The base map layer is a digital image, but no information other than location is attached to the lines. The base map is provided for reference only. PAMPHLET accompanies map Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 01/11/08 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: 510894.843733 East_Bounding_Coordinate: 541734.765105 North_Bounding_Coordinate: 4274863.999995 South_Bounding_Coordinate: 4243646.430686 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: geology Theme_Keyword: bedrock geology Theme_Keyword: surficial geology Theme_Keyword: geologic history Theme_Keyword: radiometric ages Theme_Keyword: tephrochronology Theme_Keyword: Franciscan complex Theme_Keyword: Coast Range ophiolite Theme_Keyword: Great Valley sequence Theme_Keyword: Stratigraphy Theme_Keyword: geologic structures Theme_Keyword: Great Valley sequence Theme_Keyword: Larkfield fault zone Theme_Keyword: Rodgers Creek-Maacama strike slip corridor Theme_Keyword: Southernmost Maacama Fault Zone Theme_Keyword: Mark West Fault Theme_Keyword: Rodgers Creek Fault Zone Theme_Keyword: Southern Rodgers Creek Fault segment Theme_Keyword: Healdsburg Fault segment Theme_Keyword: Bennett Valley Fault Zone Theme_Keyword: Spring Valley strand Theme_Keyword: Matanzas Creek Fault Zone Theme_Keyword: Northeast Kenwood Valley Fault Zone Theme_Keyword: Mount Hood Fault Zone Theme_Keyword: Plum Ranch Road Fault Zone Theme_Keyword: Melita-Los Guilicos Fault Zone Theme_Keyword: Thrust faults and transpressional strike slip faults Theme_Keyword: Taylor Mountain Fault Zone Theme_Keyword: Cooks Peak Fault Zone Theme_Keyword: Trenton Ridge Theme_Keyword: Trenton Thrust Fault Theme_Keyword: Castle Rock Thrust Theme_Keyword: Rodgers Creek-Healdsburg-Bennett Valley-Maacama Fault System Theme_Keyword: Santa Rosa pull-apart basin Theme_Keyword: Brush Creek Road Fault Zone Theme_Keyword: Parker Hill Road-Detention Home Fault Zone Theme_Keyword: Rincon Valley Syncline Theme_Keyword: Melita Syncline Theme_Keyword: Calvary Cemetary Syncline Theme_Keyword: Bennett Valley-Grange Hall Syncline Theme_Keyword: Holland Drive Antiform Theme_Keyword: Taylor Mountain Antiform Theme_Keyword: Structural highs Theme_Keyword: Structural lows Theme_Keyword: Weeks Creek high Theme_Keyword: Northern Sonoma Valley low Theme_Keyword: Bennett Valley high Theme_Keyword: Trenton Ridge high Theme_Keyword: Windsor Basin low Theme_Keyword: Bellevue low Theme_Keyword: Cotati Basin Theme_Keyword: Santa Rosa quadrangle Theme_Keyword: Roblar tuff Theme_Keyword: Sonoma Volcanics Theme_Keyword: Franciscan Complex Theme_Keyword: Glen Ellen formation Theme_Keyword: Tolay Volcanics Theme_Keyword: Tuff of Napa-Healdsburg Theme_Keyword: Tuff below Napa-Healdsburg Theme_Keyword: Calistoga Road tuff 1 Theme_Keyword: Calistoga Road tuff 2 Theme_Keyword: Tuff of Cloverleaf Ranch Theme_Keyword: Tuff of Goodyear Station Theme_Keyword: Tuff of Mark West Springs Theme_Keyword: Pinole Tuff Theme_Keyword: Taylor Mountain tuff 1 Theme_Keyword: Taylor Mountain tuff 2 Theme_Keyword: Taylor Mountain tuff 3 Theme_Keyword: Taylor Mountain tuff 4 Theme_Keyword: Tuff in Warrington Road breccia Theme_Keyword: Tuff of Zamaroni Quarry Theme_Keyword: Northeast Santa Rosa tuff 1 Theme_Keyword: Northeast Santa Rosa tuff 2 Theme_Keyword: Putah tuff Theme_Keyword: Lawlor tuff Theme_Keyword: Riebli Road tephra Theme_Keyword: Ar/Ar geochronology Theme_Keyword: Volcanic tephra geochemistry Theme_Keyword: Geophysical framework Theme_Keyword: Isostatic gravity data Theme_Keyword: Gravity stations Theme_Keyword: Magnetic data Theme_Keyword: Geophysical anomalies Theme_Keyword: Magnetic anomalies Theme_Keyword: Magnetic gradients Theme_Keyword: Gravity lows Theme_Keyword: Gravity highs Theme_Keyword: Gravity field Theme_Keyword: Gravity gradients Place: Place_Keyword: United States of America Place_Keyword: California Place_Keyword: Sonoma County Place_Keyword: City of Santa Rosa Stratum: Stratum_Keyword_Thesaurus: None Stratum_Keyword: Artificial Fill Stratum_Keyword: Alluvial deposits Stratum_Keyword: Colluvium Stratum_Keyword: Holocene alluvium Stratum_Keyword: Holocene basin deposits Stratum_Keyword: Holocene channels incised into older deposits Stratum_Keyword: Alluvial fan and fluvial terrace deposits undivided Stratum_Keyword: Young Holocene alluvial fan and fluvial terrace deposits Stratum_Keyword: Old Holocene alluvial fan and fluvial terrace deposits Stratum_Keyword: Holocene natural levee deposits Stratum_Keyword: Holocene and Pleistocene alluvial deposits Stratum_Keyword: Alluvial fan and terrace deposits Stratum_Keyword: Younger alluvial fan and terrace deposits Stratum_Keyword: Older alluvial fan and terrace deposits Stratum_Keyword: Landslide deposits Stratum_Keyword: Older Quaternary alluvium Stratum_Keyword: Alluvial fans and fluvial terrace deposits Stratum_Keyword: Volcanic talus breccia Stratum_Keyword: Alluvial deposits, undivided Stratum_Keyword: Silica carbonate rock Stratum_Keyword: Fluvial and lacustrine deposits Stratum_Keyword: Gravels of the Cloverleaf Ranch Stratum_Keyword: Fluvial and lacustrine deposits of Humbug Creek Stratum_Keyword: Wilson Grove Formation Stratum_Keyword: Petaluma Formation Stratum_Keyword: Diatomite and diatomaceous mudstone Stratum_Keyword: Lignite and lignitic mudstone Stratum_Keyword: Silicified (petrified) wood Stratum_Keyword: Limestone Stratum_Keyword: Breccia Stratum_Keyword: Gravel lenses Stratum_Keyword: Sonoma Volcanics Stratum_Keyword: Dacitic flows Stratum_Keyword: Rhyolitic and rhyodacitic flows and intrusive rocks Stratum_Keyword: Rhyolitic to dacitic and minor andesitic pumiceous tuff Stratum_Keyword: Crystal-rich rhyolitic to rhyodacitic welded tuff Stratum_Keyword: Andesitic to Rhyodacitic Talus Breccia Stratum_Keyword: Andesite, basaltic andesite and basalt Stratum_Keyword: Andesitic to dacitic tuff, breccia and minor flows Stratum_Keyword: Tolay Volcanics Stratum_Keyword: Great Valley Sequence and Coast Range Ophiolite Stratum_Keyword: Serpentinized ultramafic rocks Stratum_Keyword: Franciscan Complex Stratum_Keyword: Undifferentiated melange of the Central belt Stratum_Keyword: Blueschist block Stratum_Keyword: Radiolarian chert of Marin Headlands-Geysers terrane Stratum_Keyword: Basaltic volcanic rocks Temporal: Temporal_Keyword_Thesaurus: None Temporal_Keyword: Mesozoic Temporal_Keyword: Jurassic Temporal_Keyword: Cretaceous Temporal_Keyword: Cenozoic Temporal_Keyword: Tertiary Temporal_Keyword: Neogene Temporal_Keyword: Miocene Temporal_Keyword: Pliocene Temporal_Keyword: Quaternary Temporal_Keyword: Pleistocene Temporal_Keyword: Holocene Access_Constraints: None Use_Constraints: Spatial Resolution-Uses of this digital geologic map should not violate the spatial resolution of the data. Although the digital form of the data removes the constraint imposed by the scale of a paper map, the detail and accuracy inherent in map scale are also present in the digital data. The fact that this database was edited for a scale of 1:24,000 means that higher resolution information is not present in the dataset. Plotting at scales larger than 1:24,000 will not yield greater real detail, although it may reveal fine-scale irregularities below the intended resolution of the database. Similarly, where this database is used in combination with other data of higher resolution, the resolution of the combined output will be limited by the lower resolution of these data. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Western Geologic Mapping Team Contact_Person: Robert McLaughlin Contact_Position: Author Contact_Address: Address_Type: mailing and physical address Address: 345 Middlefield Road Address: MS 973 City: Menlo Park State_or_Province: CA Postal_Code: 94025 Country: USA Data_Set_Credit: Many property owners in the map area were cooperative and supportive in this investigation and are herein acknowledged. We thank Mr. and Mrs. C. J. Merner, Mr. R. Williams, Mr. D. Running, Mr. L. O’Brian, and Dr. T. Stashak for their help in accessing lands in the northeastern Santa Rosa Quadrangle. The Armstrong family (Cloverleaf Ranch) provided access to their property in the northwestern part of the map area. We thank Mr. and Mrs. J. Jones, the Witt family, Mr. B. Axell of Jackson Family Farms Vineyards, the Bertram family (Bertram Vineyards) and Mr. and Mrs. S. Adams for their help with access logistics in the Taylor Mountain area. Property owners who provided access or background information for work in the Bennett Valley area include the Guanella family, Mr. and Mrs. C. Stevens, Mr. and Mrs. G. Bunas and Mr. J. Johnson. T. Meyskens and J. McCray, Rangers for Sonoma County Regional Parks and Recreation are herein gratefully acknowledged for their cooperation in assisting us with access to roads and trails in Spring Valley Reservoir and Hood Mountain County Parks. J. Crossman, M. Baumgratz and W. Noel, of California State Parks and Recreation Department also helped with access and permits for our work within Annadel State Park. Sonoma County Water Agency provided rock samples and water well drilling information, which were helpful in determining subsurface stratigraphy in parts of the Santa Rosa Plain. We also thank J. Howard of California Division of Safety of Dams (DSOD) for providing helpful background information regarding the construction of and pre-dam conditions in the area of Santa Rosa Creek Reservoir. Numerous colleagues are involved in related cooperative investigations within or adjacent to the map area, including: D. Wagner, K. Clahan and S. Bezore (California Geological Survey); C. Hitchcock (William Lettis and Associates); Ahmed Nisar (MMI Engineering, Inc); C. M. Wentworth, R.W. Graymer, R.C. Jachens, J. Rytuba, T. Brocher, R. Simpson, T. Boatwright, D. Schwartz, K. Maher, J. Tinsley and S. Hecker, (all at the U.S. Geological Survey, Menlo Park, CA); D. Sweetkind and E. Taylor (U.S. Geological Survey, Denver, CO); and C. Farrar (Water Resources Division, U.S. Geological Survey, Lake Tahoe, CA). All of these scientists have contributed intellectual and scientific support to this mapping investigation and we herein thank them for productive discussions and exchanges of information in the office and field. Additional scientific support from the U.S. Geological Survey that has contributed significantly to this mapping investigation includes paleontologic support provided by S.W. Starratt (diatoms) and E. Wan (benthic foraminfers), C.L. Powell, II. (invertebrate fossils), and C.A. Repenning (vertebrate fossils). Laboratory support for tephrochronology including separation and analysis of tephra and database maintenance was provided by E. Wan and D. Wahl (U.S. Geological Survey, Menlo Park). Rock grinding and analytical support for radiometric dating was provided by D. Shamp (U.S. Geological Survey, Menlo Park). McLaughlin also thanks D. L. Zieglar, retired exploration geologist, Chevron Oil Company for the several discussions we have had on the subsurface geology of the Santa Rosa Plain from oil and gas well logs. These discussions provided useful insights into the regional stratigraphy of the Tertiary volcanic and sedimentary section. Funding for this mapping investigation was provided by the National Cooperative Geologic Mapping and National Earthquake Hazards Reduction Programs of the U.S. Geological Survey. This geologic map report was reviewed by Russell Evarts (U.S. Geological Survey, Menlo Park, CA), Donald Sweetkind (U.S. Geological Survey, Denver, CO) and David L. Wagner (California Geological Survey, emeritus, Independence, CA). Geologic Names were reviewed by C.L. Powell, II (U.S. Geological Survey, Menlo Park, CA). The digital database was reviewed by Zenon C. Valin. The helpful suggestions and comments of these reviewers are herein gratefully acknowledged. We thank (name) of the USGS Western Publications Group for (pronoun) careful editing which substantially improved this report. Security_Information: Security_Classification_System: None Security_Classification: Unclassified Security_Handling_Description: None Native_Data_Set_Environment: Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 9.1.0.722 Data_Quality_Information: Lineage: Process_Step: Process_Description: Metadata imported. 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Enumerated_Domain: Enumerated_Domain_Value: Qhf1 Enumerated_Domain_Value_Definition: Young Holocene alluvial fan and fluvial terrace deposits (Holocene)–Inset into old Holocene alluvial fans and fluvial terraces and pre-Holocene deposits Enumerated_Domain: Enumerated_Domain_Value: Qhf2 Enumerated_Domain_Value_Definition: Old Holocene alluvial fan and fluvial terrace deposits (Holocene?)–Inset into older Holocene and pre-Holocene deposits Enumerated_Domain: Enumerated_Domain_Value: Qhl Enumerated_Domain_Value_Definition: Holocene natural levee deposits, mapped locally on Santa Rosa Plain (Holocene) Enumerated_Domain: Enumerated_Domain_Value: Qhp Enumerated_Domain_Value_Definition: Holocene and Pleistocene alluvial deposits undivided, mapped locally west of Rincon Valley (Holocene and Pleistocene) Enumerated_Domain: Enumerated_Domain_Value: Qhpf Enumerated_Domain_Value_Definition: Alluvial fan and terrace deposits (Holocene? and (or) Pleistocene)–Gravel, sand and silt, that commonly includes cobble to boulder gravel reworked from Tertiary to Pleistocene non-marine gravel, from late Tertiary volcanic rocks and from Mesozoic bedrock. Enumerated_Domain: Enumerated_Domain_Value: Qhpf1 Enumerated_Domain_Value_Definition: Younger alluvial fan and terrace deposits (Holocene? and (or) Pleistocene)–Deposits on surfaces inset into older undeformed Pleistocene fans and terraces and pre-Pleistocene units Enumerated_Domain: Enumerated_Domain_Value: Qhpf2 Enumerated_Domain_Value_Definition: Older alluvial fan and terrace deposits (Holocene? and (or) Pleistocene)–Deposits on surfaces inset into deformed older Pleistocene and pre-Quaternary rocks Enumerated_Domain: Enumerated_Domain_Value: Qls Enumerated_Domain_Value_Definition: Landslide deposits (Holocene and Pleistocene)–Deposits varying from intact slabs of rock, to unconsolidated rock, soil, and colluvium, that are displaced down-slope by gravitational processes. Landslides may vary in area from less than 100 m2 to greater than 1 km2 Enumerated_Domain: Enumerated_Domain_Value: Qoa Enumerated_Domain_Value_Definition: Older Quaternary alluvium, undivided (Pleistocene)–Generally uplifted and dissected, isolated surfaces and alluvial fills of small basins, sag ponds, and marshes Enumerated_Domain: Enumerated_Domain_Value: Qpf Enumerated_Domain_Value_Definition: Alluvial fans and fluvial terrace deposits undivided (Pleistocene)–Gravel, sand and silt in deposits characterized by unsorted character, a relict fan-like morphology, and their presence on elevated surfaces. The unit is distinguished from younger alluvial fan deposits by its dissected irregular surface morphology and incision by younger Pleistocene and Holocene alluvial deposits. Unit unconformably overlies the Petaluma Formation and incises or interfingers with the gravel of Cloverleaf Ranch (Tgc) Enumerated_Domain: Enumerated_Domain_Value: Qpb Enumerated_Domain_Value_Definition: Volcanic talus breccia (Pleistocene?)–Coarse volcanic talus composed of debris from silicic ash and andesitic breccia of the Sonoma Volcanics, present along the northeastern side of Rincon Valley. Unit may be derived from normal fault scarps Enumerated_Domain: Enumerated_Domain_Value: Qt Enumerated_Domain_Value_Definition: Alluvial deposits, undivided (Holocene and Pleistocene)–Includes undivided Holocene and Pleistocene terrace deposits Enumerated_Domain: Enumerated_Domain_Value: sc Enumerated_Domain_Value_Definition: Silica carbonate rock (Pliocene-Miocene?)–Hydrothermally altered ultramafic rocks, composed of quartz and magnesium carbonate mineral assemblages, commonly associated with mercury and other epithermal base metal sulfide occurences (Ag, Au, Pb, Zn, Cu). Age generally is somewhat younger than age of associated Tertiary volcanic rocks that provided hydrothermal heat sources (McLaughlin and others, 1996; Rytuba, 1993; Peabody and Einaudi, 1992) Enumerated_Domain: Enumerated_Domain_Value: QTg Enumerated_Domain_Value_Definition: Fluvial and lacustrine deposits (early Pleistocene and Pliocene)–Gravel, sandstone, siltstone and mudstone, and non-marine diatomite. Minor siliceous ash is present in uppermost part of the unit in northwestern Rincon Valley. Unit includes gravels previously assigned to the Glen Ellen and Huichica Formations; names that are not used here because of new stratigraphic data and inconsistent previous lithologic criteria for separating the Glen Ellen and Huichica Formations. (McLaughlin and others, 2004; Wagner and others, 2005; also discussions in McLaughlin and others, 2005) Enumerated_Domain: Enumerated_Domain_Value: Tgc Enumerated_Domain_Value_Definition: Gravels of the Cloverleaf Ranch (Pliocene?)–Fluvial, pebbly to cobbly gravel, pebbly, lithic to quartzose sand, and tuffaceous white clayey mudstone and siltstone. Unit locally contains an undated, waterlain ash layer with a geochemical signature suggesting it is younger than ~ 3.12 Ma (Tables 2.2, 2.3, Loc. 8). Unit also contains common rounded pebbles of obsidian, derived from a source at Annadel State Park, dated at 4.5 Ma (Table 2.1; Loc. 21 Figure 2.2). Unit may be partly coeval with Pleistocene and Pliocene fluvial and lacustrine deposits (QTg), but age of the contained obsidian clast suite and of intercalated ash, suggests that gravels of the Cloverleaf Ranch are largely 2.8 Ma or older Enumerated_Domain: Enumerated_Domain_Value: Tgp Enumerated_Domain_Value_Definition: Fluvial and lacustrine deposits of Humbug Creek (Pliocene)–Gravel, sandstone, siltstone, mudstone, nonmarine diatomite, and locally mapped intercalated siliceous tuff (Tst). In Santa Rosa and western Kenwood quadrangles, unit consists largely of boulder, cobble and pebble gravel, and sand and silt derived from underlying Mesozoic rocks and from Tertiary volcanic rocks and exhibits primarily west-northwest directed paleoflow. Based on stratigraphy and the ages of underlying and interbedded volcanic units, we interpret the age of the fluvial and lacustrine deposits of Humbug Creek to be 3.3-4.4 Ma. Unit may be unconformably overlain by Pleistocene and Pliocene fluvial and lacustrine deposits (QTg) in Rincon Valley Enumerated_Domain: Enumerated_Domain_Value: Tw Enumerated_Domain_Value_Definition: Wilson Grove Formation (Pliocene and Miocene)–The Wilson Grove Formation is not exposed at the surface in the Santa Rosa or Kenwood 7.5' quadrangles, but it underlies much of the Santa Rosa Plain (Sheet 2, cross sections B and C). The Wilson Grove Formation includes marine pebbly sandstone, siltstone and distinctive well rounded, friable, matrix- and clast-supported pebbly gravel, with quartz, dark chert and porcellanitic shale clasts (Cotati lithofacies of the Wilson Grove and Petaluma formations) in a sandy to silty matrix. Unit is partly coeval with late Miocene part of Petaluma Formation and it locally includes the Roblar tuff, radiometrically dated at 6.26 ± 0.4 Ma (Ar-Ar) Enumerated_Domain: Enumerated_Domain_Value: Tp Enumerated_Domain_Value_Definition: Petaluma Formation (Pliocene and Miocene)–Dominantly sandy to silty gravel, silty sandstone, siltstone, and mudstone (Tp). Contains diatomite (Tpd) and clayey diatomaceous shale with local lenses of lignite and lignitic mudstone (Tplg), silicified wood (Tpwd), and fresh water limestone (Tplm). Petaluma Formation strata were deposited in fluvial, lacustrine, and brackish to estuarine settings and the formation locally contains the 6.26 ± 0.4 Ma (Ar-Ar) Roblar tuff. Depositional settings are locally constrained by invertebrate fossils, diatoms, ostracodes, rare foraminifers and rare land mammals. The formation locally includes interbedded gravel with well rounded and polished pebbles of banded porcellanite, milky quartz and black chert and argillite correlative with the gravels of Cotati (Fox, 1983), a lithofacies of the Petaluma and Wilson Grove Formations. The Petaluma Formation is older than ~4.8-5.0 Ma and younger than ~8.0 Ma where exposed along the E side of Santa Rosa Plain. Beneath the Santa Rosa Plain and southwest of Cotati and Rohnert Park, the lower Petaluma Formation is intercalated with the older, ~8.5-10 Ma Tolay Volcanics, and overlies Mesozoic basement of the Franciscan Complex, Coast Range ophiolite and Great Valley sequence. Enumerated_Domain: Enumerated_Domain_Value: Tpd Enumerated_Domain_Value_Definition: Diatomite and diatomaceous mudstone. The diatom flora in these strata (Fossil Locality 4) suggest a shallow, eutrophic, neutral to slightly alkalic, stagnant lacustrine setting (S. Staratt, written commun. 2006) Enumerated_Domain: Enumerated_Domain_Value: Tplg Enumerated_Domain_Value_Definition: Lignite and lignitic mudstone Enumerated_Domain: Enumerated_Domain_Value: Tpwd Enumerated_Domain_Value_Definition: Silicified (petrified) wood Enumerated_Domain: Enumerated_Domain_Value: Tplm Enumerated_Domain_Value_Definition: Limestone, with brackish or fresh water depositional setting, locally fossiliferous, present as lenses in the upper parts of basaltic andesite flows and breccias Enumerated_Domain: Enumerated_Domain_Value: Tprb Enumerated_Domain_Value_Definition: Breccia, composed dominantly of angular, tectonically slickened clasts of rhyodacitic rocks with variable textures, interpreted to represent a fault scarp-derived breccia. Breccia includes clasts up to 3m in a comminuted matrix derived from rhyodacitic intrusives, flows and tuffs. Enumerated_Domain: Enumerated_Domain_Value: Tprg Enumerated_Domain_Value_Definition: Gravel lenses, intercalated in breccia, up to ~5m thick, unsorted to poorly sorted, un-organized to weakly segregated and cross-bedded. Gravel is composed of rounded to subangular pebbles to cobbles derived from Franciscan and related Mesozoic sources and from older Tertiary volcanics deposited in alluvial fans, debris flows and talus settings Enumerated_Domain: Enumerated_Domain_Value: Tsd Enumerated_Domain_Value_Definition: Dacitic flows–mapped near the northeast corner of the Santa Rosa quadrangle and in the southeast half of the quadrangle along the Rodgers Creek Fault Zone. The dacite lacks macroscopic quartz or K-feldspar, commonly contains plagioclase phenocrysts, and rare hornblende Enumerated_Domain: Enumerated_Domain_Value: Tsr Enumerated_Domain_Value_Definition: Rhyolitic and rhyodacitic flows and intrusive rocks–porphyritic to aphanitic, with phenocrysts of quartz and plagioclase. Includes the rhyodacitic rocks of Zamaroni Quarry (7.26±0.04 Ma), the rhyodacitic rocks of Cook Peak (7.94±0.02 Ma), and perlitic to banded rhyolitic to rhyodacitic flow rocks and obsidian in Annadel State Park (4.5±0.01 Ma) Enumerated_Domain: Enumerated_Domain_Value: Tsr mineralized Enumerated_Domain_Value_Definition: Rhyolitic and rhyodacitic flows and intrusive rocks–porphyritic to aphanitic, with phenocrysts of quartz and plagioclase. Includes the rhyodacitic rocks of Zamaroni Quarry (7.26±0.04 Ma), the rhyodacitic rocks of Cook Peak (7.94±0.02 Ma), and perlitic to banded rhyolitic to rhyodacitic flow rocks and obsidian in Annadel State Park (4.5±0.01 Ma) Enumerated_Domain: Enumerated_Domain_Value: Tst Enumerated_Domain_Value_Definition: Rhyolitic to dacitic and minor andesitic pumiceous tuff–mostly ash-flows and minor air fall. This unit includes named and unnamed tephra layers of different ages in the Sonoma Volcanics (see Tephra data Tables 2.2 and 2.3, figure 2.2, and discussion in pamphlet) Enumerated_Domain: Enumerated_Domain_Value: Tstw Enumerated_Domain_Value_Definition: Crystal-rich rhyolitic to rhyodacitic welded tuff (Pliocene)–Welded zones locally at tops of tuff layers that are overlain by flows of andesite or basalt Enumerated_Domain: Enumerated_Domain_Value: Tstb Enumerated_Domain_Value_Definition: Andesitic to Rhyodacitic Talus Breccia (Pliocene)–Mapped locally in the northeast part of Santa Rosa 7.5' quadrangle, between the 4.83 Ma Lawlor Tuff and overlying basaltic andesite. Breccia consists of angular boulders and blocks of basalt, andesite, and vitric, porphyritic rhyodacite, in a lithic rhyo-dacitic pumiceous tuff matrix. The breccia may be associated with syn-volcanic faulting and (or) proximal pyroclastic venting Enumerated_Domain: Enumerated_Domain_Value: Tsb Enumerated_Domain_Value_Definition: Andesite, basaltic andesite and basalt–Subaerial andesitic to basaltic flows, flow breccia and tuff-breccia, local waterlain andesitic tuff and minor dacitic ash-flow tuff, aerially between the Healdsburg and southern Rodgers Creek segments of the Rodgers Creek Fault Zone and the Mark West Fault Zone. Unit may compose a relatively thin cover to pre-Miocene basement (cross sections A-C). Andesitic rocks are intercalated with and underlain by the Petaluma Formation and the numerous named and unnamed rhyodacitic to andesitic tuffs (Tst), and local rhyodacitic flows and intrusive rocks (Tsr) of the Sonoma Volcanics Enumerated_Domain: Enumerated_Domain_Value: Tsbt Enumerated_Domain_Value_Definition: Andesitic to dacitic tuff, breccia and minor flows–Includes air fall and ash flow tuffs and some possibly reworked waterlain tuff (Higgins, 1983). Unit underlies basaltic andesite flows dated at 4.7 ± 0.03 Ma. Andesitic tuff breccia also overlies andesitic flows and breccias (Tsb) and rhyolitic rocks (Tsr) northeast of Bennett Mountain, that are probably correlative with the obsidian of Annadel State Park (4.5 ± 0.01 Ma) Enumerated_Domain: Enumerated_Domain_Value: Tvt Enumerated_Domain_Value_Definition: Tolay Volcanics (Miocene)–Rhyolite, andesite and basalt, interbedded with the sedimentary rocks of the Petaluma Formation. Unit is not present at the surface in Santa 7.5' Rosa quadrangle, but is mapped in the adjacent Cotati 7.5' quadrangle (Clahan and others, 2003) and beneath Santa Rosa plain, based on exploratory oil and gas well data (cross section C; figure 2.3A) Enumerated_Domain: Enumerated_Domain_Value: KJso Enumerated_Domain_Value_Definition: Great Valley Sequence and Coast Range Ophiolite, Undivided (Cretaceous and Jurassic)–Marine sedimentary rocks of the Cretaceous and Jurassic Great Valley Sequence and (or) igneous and pelagic rocks of the Jurassic Coast Range ophiolite, inferred to be locally present beneath Santa Rosa plain and beneath Miocene and younger units between the Rodgers Creek-Healdsburg and Maacama Fault Zones. Great Valley Sequence strata includes thin- to medium-bedded, shaly to arkosic, sandy turbidites and thick bedded to massive, conglomeratic submarine channel deposits. No exposures of Great Valley Sequence strata are recognized at the surface in the map area but are inferred in the subsurface based on along-strike and down-plunge projection from exposures in adjacent quadrangles Enumerated_Domain: Enumerated_Domain_Value: Jos Enumerated_Domain_Value_Definition: Serpentinized ultramafic rocks–Predominantly serpentinized non-cumulate tectonitic harzburgite and dunite. Serpentine mineral assemblage is typically a mixture of lizardite and chrysotile. In places, unit includes minor cumulate ultramafic to gabbroic rocks. Locally, pods and lenses of unit are imbricated with mélange of Franciscan Complex Central Belt Enumerated_Domain: Enumerated_Domain_Value: fcm Enumerated_Domain_Value_Definition: Undifferentiated melange of the Central belt–Largely penetratively sheared sandstone and argillite, containing blocks of varying lithology. Enumerated_Domain: Enumerated_Domain_Value: bls Enumerated_Domain_Value_Definition: Blueschist block–Mafic to felsic igneous and pelagic rocks, metamorphosed to high blueschist grade. Includes eclogite and amphibolite-grade blocks partially retrograded to blueschist and locally, tuffaceous pelitic rocks that contain chrome mica (fuchsite), white mica, lawsonite and sodic amphibole Enumerated_Domain: Enumerated_Domain_Value: fcc Enumerated_Domain_Value_Definition: Radiolarian chert of Marin Headlands-Geysers terrane–Red to green, locally tuffaceous, and in places depositional on, or interlayered with, basaltic volcanic rocks. Where section is complete, radiolarian chert overlies pillow basalt, is of early Late Cretaceous (Cenomanian) to Early Jurassic (Pliensbachian) age (McLaughlin and Pessagno, 1978; Hagstrum and Murchey, 1993) and is depositionally overlain by terrigenous metasandstone and shale Enumerated_Domain: Enumerated_Domain_Value: fcv Enumerated_Domain_Value_Definition: Basaltic volcanic rocks–Massive to pillowed basaltic flows, breccia and tuff, generally metamorphosed to low-greenschist grade, containing epidote and pumpellyite. Includes basaltic rocks of Marin Headlands-Geysers terrane Detailed_Description: Entity_Type: Entity_Type_Label: sr-struc Entity_Type_Definition: Geologic Bedding Measurements Entity_Type_Definition_Source: Author Attribute: Attribute_Label: OBJECTID Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: SHAPE Attribute_Definition: Feature geometry. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: STRIKE Attribute_Definition: Strike of beds Attribute: Attribute_Label: DIP Attribute_Definition: Dip of beds Attribute: Attribute_Label: pttype Attribute_Definition: Geologic Bedding Description Attribute_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: bedding Enumerated_Domain_Value_Definition: Inclined bedding—Showing strike and dip Enumerated_Domain: Enumerated_Domain_Value: bedding, loc. features Enumerated_Domain_Value_Definition: Inclined bedding, where top direction of beds is known from local features—Showing strike and dip Enumerated_Domain: Enumerated_Domain_Value: fault dip Enumerated_Domain_Value_Definition: Fault dip Enumerated_Domain: Enumerated_Domain_Value: fossil, bivalve Enumerated_Domain_Value_Definition: Fossil locality, bivalve Enumerated_Domain: Enumerated_Domain_Value: fossil diatom Enumerated_Domain_Value_Definition: Fossil locality, diatom Enumerated_Domain: Enumerated_Domain_Value: fossil, vertebrate Enumerated_Domain_Value_Definition: Fossil locality, vertebrate Enumerated_Domain: Enumerated_Domain_Value: inclined foliation Enumerated_Domain_Value_Definition: Inclined metamorphic or tectonic foliation—Showing strike and dip Enumerated_Domain: Enumerated_Domain_Value: inclined joint Enumerated_Domain_Value_Definition: Small, minor inclined joint (1st option)—Showing strike and dip Enumerated_Domain: Enumerated_Domain_Value: lava flow or dike attitude Enumerated_Domain_Value_Definition: Inclined lava flow or dike—Showing strike and dip Enumerated_Domain: Enumerated_Domain_Value: overturned bedding Enumerated_Domain_Value_Definition: Approximate orientation of overturned bedding—Showing approximate strike and dip Enumerated_Domain: Enumerated_Domain_Value: overturned bedding, local features Enumerated_Domain_Value_Definition: Approximate orientation of overturned bedding, where top direction of beds is known from local features—Showing approximate strike and dip Enumerated_Domain: Enumerated_Domain_Value: photo-interpreted bedding Enumerated_Domain_Value_Definition: Gently inclined bedding, as determined remotely or from aerial photographs—Showing approximate strike and direction of dip Enumerated_Domain: Enumerated_Domain_Value: seep Enumerated_Domain_Value_Definition: Spring, seep, or drainage (runoff) Enumerated_Domain: Enumerated_Domain_Value: vertical bedding Enumerated_Domain_Value_Definition: Vertical bedding—Showing strike Enumerated_Domain: Enumerated_Domain_Value: vertical compaction Enumerated_Domain_Value_Definition: Vertical compaction—Showing strike Enumerated_Domain: Enumerated_Domain_Value: vertical foliation Enumerated_Domain_Value_Definition: Vertical metamorphic or tectonic foliation—Showing strike Enumerated_Domain: Enumerated_Domain_Value: well Enumerated_Domain_Value_Definition: Water well Detailed_Description: Entity_Type: Entity_Type_Label: sr-ls Entity_Type_Definition: Landslide slip arrows and unit description leaders Entity_Type_Definition_Source: Author Attribute: Attribute_Label: OBJECTID Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: SHAPE Attribute_Definition: Feature geometry. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: SHAPE_Length Attribute_Definition: Length of feature in internal units. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Positive real numbers that are automatically generated. Detailed_Description: Entity_Type: Entity_Type_Label: sr-polyAnno Attribute: Attribute_Label: OBJECTID Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: SHAPE Attribute_Definition: Feature geometry. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: FeatureID Attribute: Attribute_Label: ZOrder Attribute: Attribute_Label: AnnotationClassID Attribute: Attribute_Label: Element Attribute: Attribute_Label: SHAPE_Length Attribute_Definition: Length of feature in internal units. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Positive real numbers that are automatically generated. Attribute: Attribute_Label: SHAPE_Area Attribute_Definition: Area of feature in internal units squared. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Positive real numbers that are automatically generated. Detailed_Description: Entity_Type: Entity_Type_Label: sr-strucAnno Attribute: Attribute_Label: OBJECTID Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: SHAPE Attribute_Definition: Feature geometry. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: FeatureID Attribute: Attribute_Label: ZOrder Attribute: Attribute_Label: AnnotationClassID Attribute: Attribute_Label: Element Attribute: Attribute_Label: SHAPE_Length Attribute_Definition: Length of feature in internal units. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Positive real numbers that are automatically generated. Attribute: Attribute_Label: SHAPE_Area Attribute_Definition: Area of feature in internal units squared. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Positive real numbers that are automatically generated. Detailed_Description: Entity_Type: Entity_Type_Label: sr-grav Entity_Type_Definition: Gravity contour lines Entity_Type_Definition_Source: Author Attribute: Attribute_Label: OBJECTID Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: SHAPE Attribute_Definition: Feature geometry. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: ID Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: FROMNODE Attribute: Attribute_Label: TONODE Attribute: Attribute_Label: LEFTPOLYGON Attribute: Attribute_Label: RIGHTPOLYGON Attribute: Attribute_Label: LTYPE Attribute_Definition: Cross Section Lines Attribute_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: cross section Enumerated_Domain_Value_Definition: Location of author's cross section Attribute: Attribute_Label: SHAPE_Length Attribute_Definition: Length of feature in internal units. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Positive real numbers that are automatically generated. Detailed_Description: Entity_Type: Entity_Type_Label: sr-mag Entity_Type_Definition: Magnetic contour lines Entity_Type_Definition_Source: Author Attribute: Attribute_Label: OBJECTID Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: SHAPE Attribute_Definition: Feature geometry. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: ID Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: FROMNODE Attribute: Attribute_Label: TONODE Attribute: Attribute_Label: LEFTPOLYGON Attribute: Attribute_Label: RIGHTPOLYGON Attribute: Attribute_Label: LTYPE Attribute_Definition: Cross Section Lines Attribute_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: cross section Enumerated_Domain_Value_Definition: Location of author's cross section Attribute: Attribute_Label: SHAPE_Length Attribute_Definition: Length of feature in internal units. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Positive real numbers that are automatically generated. Detailed_Description: Entity_Type: Entity_Type_Label: sr-text Entity_Type_Definition: Text annotation showing up/down thrown fault block direction (U/D) Entity_Type_Definition_Source: Author Attribute: Attribute_Label: OBJECTID Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: Label_text Attribute_Definition: Down (D) or Up (U) block movement Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: D Enumerated_Domain_Value_Definition: Downthrown side of fault block Enumerated_Domain: Enumerated_Domain_Value: U Enumerated_Domain_Value_Definition: Upthrown side of fault block Enumerated_Domain: Enumerated_Domain_Value: D? Enumerated_Domain_Value_Definition: Downthrown side of fault, questionable Enumerated_Domain: Enumerated_Domain_Value: U? Enumerated_Domain_Value_Definition: Upthrown side of fault, questionable Detailed_Description: Entity_Type: Entity_Type_Label: sr-xsec Entity_Type_Definition: Location of Cross Section Lines Entity_Type_Definition_Source: Author Attribute: Attribute_Label: OBJECTID Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: SHAPE Attribute_Definition: Feature geometry. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: FNODE_ Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Unique whole numbers that are automatically generated. Attribute: Attribute_Label: TNODE_ Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Unique whole numbers that are automatically generated. Attribute: Attribute_Label: LPOLY_ Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Unique whole numbers that are automatically generated. Attribute: Attribute_Label: RPOLY_ Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Unique whole numbers that are automatically generated. Attribute: Attribute_Label: LENGTH Attribute_Definition: Length of feature in internal units. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Positive real numbers that are automatically generated. Attribute: Attribute_Label: XSEC_ Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: XSEC_ID Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: LTYPE Attribute_Definition: Cross Section Label Attribute_Definition_Source: Author Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: secAA' Enumerated_Domain_Value_Definition: Cross Section Line A-A' Enumerated_Domain: Enumerated_Domain_Value: secA'A'' Enumerated_Domain_Value_Definition: Cross Section Line A'-A'' Enumerated_Domain: Enumerated_Domain_Value: secBB' Enumerated_Domain_Value_Definition: Cross Section Line B-B' Enumerated_Domain: Enumerated_Domain_Value: secB'B'' Enumerated_Domain_Value_Definition: Cross Section Line B'-B'' Enumerated_Domain: Enumerated_Domain_Value: secCC' Enumerated_Domain_Value_Definition: Cross Section Line C-C' Enumerated_Domain: Enumerated_Domain_Value: secC'C'' Enumerated_Domain_Value_Definition: Cross Section Line C'-C'' Attribute: Attribute_Label: SEL Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Unique whole numbers that are automatically generated. Attribute: Attribute_Label: SYMB Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Unique whole numbers that are automatically generated. Attribute: Attribute_Label: SHAPE_Length Attribute_Definition: Length of feature in internal units. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Positive real numbers that are automatically generated. Detailed_Description: Entity_Type: Entity_Type_Label: sr-tephra Entity_Type_Definition: Tephra sample locations Entity_Type_Definition_Source: Author Attribute: Attribute_Label: OBJECTID Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: SHAPE Attribute_Definition: Feature geometry. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: MapLoc Attribute_Definition: Map Locality number (Fig. 2.2) Attribute: Attribute_Label: Sample Attribute_Definition: Rock sample number Attribute: Attribute_Label: Longitude Attribute_Definition: Longitude of sample location Attribute: Attribute_Label: Latitude Attribute_Definition: Latitude of sample location Attribute: Attribute_Label: Age Attribute_Definition: Approximate age or age range of sample Detailed_Description: Entity_Type: Entity_Type_Label: sr-geochron Entity_Type_Definition: Radiometrically dated sample locations Entity_Type_Definition_Source: Author Attribute: Attribute_Label: OBJECTID Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: SHAPE Attribute_Definition: Feature geometry. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: MapLoc Attribute_Definition: Map Locality number (Fig. 2.2) Attribute: Attribute_Label: Sample Attribute_Definition: Rock sample number Attribute: Attribute_Label: Longitude Attribute_Definition: Longitude of sample location Attribute: Attribute_Label: Latitude Attribute_Definition: Latitude of sample location Attribute: Attribute_Label: Age Attribute_Definition: Approximate age or age range of sample Detailed_Description: Entity_Type: Entity_Type_Label: Anno_27_45 Detailed_Description: Entity_Type: Entity_Type_Label: Anno_43_46 Resource_Description: Downloadable Data Distribution_Liability: Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this publication has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use. Metadata_Reference_Information: Metadata_Date: 20080111 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Robert McLaughlin Contact_Organization: U.S. Geological Survey Western Geologic Mapping Team Contact_Address: Address_Type: mailing and physical address Address: 345 Middlefield Rd Address: MS 973 City: Menlo Park State_or_Province: CA Postal_Code: 94025 Country: USA Contact_Voice_Telephone: (650) 329-4945 Contact_Facsimile_Telephone: (650) 329-4936 Contact_Electronic_Mail_Address: rjmcl@usgs.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Extensions: Online_Linkage: Profile_Name: ESRI Metadata Profile