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This digital map database, which is compiled from previouslyunpublished and open-filed U.S. Geol. Survey reports (Wesling andHelley, 1989), represents the general distribution and identity ofQuaternary deposits in eight 7.5 minute quadrangles in the southernSan Francisco Bay region, California.
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This Open-File report is a digital geologic map database. Thisdigital map database is compiled from previously published sourcescombined with some new mapping and modifications in nomenclature.The geologic map database delineates map units that are identifiedby general age and lithology following the stratigraphicnomenclature of the U. S. Geological Survey. For detaileddescriptions of the units, their stratigraphic relations, sourcesof geologic mapping, and data on exploratory wells consult Yerkes(1997), and Yerkes and Showalter (1990).
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This Open-File report is a digital geologic map database. Thisdigital map database is compiled from previously published sourcescombined with some new mapping and modifications in nomenclature.The geologic map database delineates map units that are identifiedby general age and lithology following the stratigraphicnomenclature of the U. S. Geological Survey. For detaileddescriptions of the units, their stratigraphic relations, sourcesof geologic mapping, and data on exploratory wells consult Yerkes(1996), and Yerkes and Showalter (1990). More specific informationabout the units may be available in the original sources.
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This Open-File report is a digital geologic map database. Thisdigital map database is compiled from previously published sourcescombined with some new mapping and modifications in nomenclature.The geologic map database delineates map units that are identifiedby general age and lithology following the stratigraphicnomenclature of the U. S. Geological Survey. For detaileddescriptions of the units, their stratigraphic relations, sourcesof geologic mapping, and data on exploratory wells consult Yerkes(1996), and Yerkes and Showalter (1990). More specific informationabout the units may be available in the original sources.
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This digital map database, compiled from previously published andunpublished data, and new mapping by the authors, represents thegeneral distribution of bedrock and surficial deposits in the mappedarea. Together with the accompanying text file (pamf.ps, pamf.pdf,pamf.txt), it provides current information on the geologic structureand stratigraphy of the area covered. The database delineates mapunits that are identified by general age and lithology following thestratigraphic nomenclature of the U.S. Geological Survey. The scaleof the source maps limits the spatial resolution (scale) of thedatabase to 1:62,500 or smaller.
Tags: 06081 = San Mateo, 06085 = Santa Clara, 06087 = Santa Cruz, 1100 - Geology, 1101 - General, All tags...
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This Open-File report is a digital geologic map database. Thisdigital map database is compiled from previously published sourcescombined with some new mapping and modifications in nomenclature.The geologic map database delineates map units that are identifiedby general age and lithology following the stratigraphicnomenclature of the U. S. Geological Survey. For detaileddescriptions of the units, their stratigraphic relations andsources of geologic mapping consult Yerkes and Campbell (1993).
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This Open-File report is a digital geologic map database. Thisdigital map database is compiled from previously published sourcescombined with some new mapping and modifications in nomenclature.The geologic map database delineates map units that are identifiedby general age and lithology following the stratigraphicnomenclature of the U. S. Geological Survey. For detaileddescriptions of the units, their stratigraphic relations andsources of geologic mapping consult Yerkes and Campbell (1994).More specific information about the units may be available in theoriginal sources.
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Geologic data from a generalized geologic map of the Coeur d'Alene mining district by Gott and Cathrall (1980) was entered into a geographic information system (GIS) as part of a larger effort to create a regional digital geology for the Pacific Northwest. The map area is located in northern Idaho and extends across the state border into western Montana.
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This Open-File report is a digital geologic map database. Thisdigital map database is compiled from previously published sourcescombined with some new mapping and modifications in nomenclature.The geologic map database delineates map units that are identifiedby general age and lithology following the stratigraphicnomenclature of the U. S. Geological Survey. For detaileddescriptions of the units, their stratigraphic relations, sourcesof geologic mapping, and data on exploratory wells consult Yerkes(1996), and Yerkes and Showalter (1990).
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This Open-File report is a digital geologic map database. Thisdigital map database is compiled from previously published sourcescombined with some new mapping and modifications in nomenclature.The geologic map database delineates map units that are identifiedby general age and lithology following the stratigraphicnomenclature of the U. S. Geological Survey. For detaileddescriptions of the units, their stratigraphic relations, sourcesof geologic mapping, and data on exploratory wells consult Yerkesand Campbell (1995), and Yerkes and Showalter (1990). Morespecific information about the units may be available in theoriginal sources.
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Contra Costa County is located at the northern end of the DiabloRange of Central California. It is bounded on the north byCarquinez Strait, through which flows 27 percent of California'ssurface water runoff. San Francisco Bay forms the westernboundary, the San Joaquin Valley borders it on the east and theLivermore Valley forms the southern boundary. Contra Costa is oneof the nine Bay Area counties with streams that are tributaries toSan Francisco Bay. Most of the county is mountainous with steeprugged topography. Mount Diablo, in the center of the county, isone of the highest peaks in the Bay Area, reaching an elevation of1173 meters (3,849 ft). Contra Costa County is covered bytwenty-five 7.5' topographic Quadrangles...
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This Open-File report is a digital geologic map database. Thisdigital map database is compiled from previously published sourcescombined with some new mapping and modifications in nomenclature.The geologic map database delineates map units that are identifiedby general age and lithology following the stratigraphicnomenclature of the U. S. Geological Survey. For detaileddescriptions of the units, their stratigraphic relations andsources of geologic mapping consult Yerkes and Campbell (1993).More specific information about the units may be available in theoriginal sources.
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This Open-File report is a digital geologic map database. Thisdigital map database is compiled from previously published sourcescombined with some new mapping and modifications in nomenclature.The geologic map database delineates map units that are identifiedby general age and lithology following the stratigraphicnomenclature of the U. S. Geological Survey. For detaileddescriptions of the units, their stratigraphic relations, sourcesof geologic mapping, and data on exploratory wells consult Yerkesand Campbell (1995), and Yerkes and Showalter (1990). Morespecific information about the units may be available in theoriginal sources.
The ssfb_m1 digital map database, which is compiled from 1970'svintage sources, represents the general distribution and identityof geologic materials in the southern San Francisco Bay region,California, west of the Calaveras fault. It is not a geologic map,because it does not address the geologic structure or thestratigraphic organization of the map units in a systematic way.Instead, it is directed at the distribution and character of thegeologic materials following the pattern of its progenitors,Wentworth and others (1985) and Ellen and Wentworth (in press).Consultation of these reports and the other compilation sources willaid in using the database.
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Crystalline basement in central California extends westward from theexposed Sierra Nevada beneath the sedimentary fill of the GreatValley and under the eastern edge of the Coast Ranges at mid-crustaldepth. The surface of this basement is defined from three types ofcontrol: in the Sierra Nevada from the topography itself, beneaththe eastern two thirds of the Great Valley in considerable detailfrom numerous wells drilled for oil and gas, and beneath thewestern San Joaquin Valley in less detail from seismic reflectionand refraction profiles. Together, these data demonstrate that thesurface of crystalline rock is continuous from the exposed rock inthe mountains to the top of high-velocity rock buried deep beneaththe...
This Open-File report is a digital geologic map database. Thisdigital map database is compiled from previously published sourcescombined with some new mapping and modifications in nomenclature.The geologic map database delineates map units that are identifiedby general age and lithology following the stratigraphicnomenclature of the U. S. Geological Survey. For detaileddescriptions of the units, their stratigraphic relations, sourcesof geologic mapping, and data on exploratory wells consult Yerkes(1997), and Yerkes and Showalter (1990).
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USGS-Open-File Report 99-317 is a collection of digitaldatabases that are the result of the compilation andre-interpretation of published and unpublished 1:250,000-and 1:63,360-scale mapping. The map area coversapproximately 62,000 sq km (23,000 sq mi) in land area andencompasses much of 13 1:250,000-scale quadrangles on theAlaska Peninsula in southwestern Alaska. This reportshows the bedrock geology of the following 1:250,000 scalequadrangles: Naknek, Mt. Katmai, Ugashik, Chignik, SutwikIsland, Cold Bay, Port Moller, Stepovak Bay, False Pass,Simeonof Island, Bristol Bay; and parts of Afognak andKarluk.


map background search result map search result map Geologic map and map database of the Palo Alto 30' X 60' quadrangle, California Preliminary geologic map of the Fillmore 7.5' quadrangle, southern California: A digital database Preliminary geologic map of the Oat Mountain 7.5' quadrangle, southern California: A digital database Preliminary geologic map of the Canoga Park 7.5' quadrangle, southern California: A digital database Preliminary geologic map of the Topanga 7.5' quadrangle, southern California: A digital database The Surface of Crystalline Basement, Great Valley and Sierra Nevada, California: A Digital Map Database Digital geologic map of the Coeur d'Alene district, Idaho and Montana Preliminary geologic map of the Mint Canyon 7.5' quadrangle, southern California: A digital Database Preliminary geologic map of the Van Nuys 7.5' quadrangle, southern California: A digital database Preliminary geologic map of the Burbank 7.5' quadrangle, southern California: A digital database Preliminary geologic map of the Simi 7.5' quadrangle, southern California: A digital database Preliminary geologic map of the Hollywood 7.5' quadrangle, southern California: A digital database Digital geologic map of the Springdale 7.5' quadrangle, Nevada Quaternary geology of Contra Costa County, and surrounding parts of Alameda, Marin, Sonoma, Solano, Sacramento, and San Joaquin Counties, California: A digital database Digital data for geologic framework of the AlaskaPeninsula, southwest Alaska, and the Alaska Peninsulaterrane Preliminary geologic map of the Fillmore 7.5' quadrangle, southern California: A digital database Preliminary geologic map of the Mint Canyon 7.5' quadrangle, southern California: A digital Database Preliminary geologic map of the Van Nuys 7.5' quadrangle, southern California: A digital database Preliminary geologic map of the Canoga Park 7.5' quadrangle, southern California: A digital database Preliminary geologic map of the Burbank 7.5' quadrangle, southern California: A digital database Digital geologic map of the Springdale 7.5' quadrangle, Nevada Preliminary geologic map of the Oat Mountain 7.5' quadrangle, southern California: A digital database Preliminary geologic map of the Topanga 7.5' quadrangle, southern California: A digital database Preliminary geologic map of the Simi 7.5' quadrangle, southern California: A digital database Preliminary geologic map of the Hollywood 7.5' quadrangle, southern California: A digital database Digital geologic map of the Coeur d'Alene district, Idaho and Montana Quaternary geology of Contra Costa County, and surrounding parts of Alameda, Marin, Sonoma, Solano, Sacramento, and San Joaquin Counties, California: A digital database Geologic map and map database of the Palo Alto 30' X 60' quadrangle, California The Surface of Crystalline Basement, Great Valley and Sierra Nevada, California: A Digital Map Database Digital data for geologic framework of the AlaskaPeninsula, southwest Alaska, and the Alaska Peninsulaterrane