R. W. Graymer

United States Geological Survey

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R. C. Jachens

United States Geological Survey

D. A. Ponce

United States Geological Survey

Carl M. Wentworth

United States Geological Survey

Robert W. Simpson

University College Lahore

V. E. Langenheim

United States Geological Survey

David L. Jones

University of Wyoming

Earl E. Brabb

United States Geological Survey

Robert J. McLaughlin

United States Geological Survey

Janet T. Watt

Pacific Science Center

B. Aagaard

United States Geological Survey

Cooperative Institutions

United States Geological Survey

101

Menlo School

United States Department of the Interior

University of California, Berkeley

Pacific Island Ecosystems Research Center

Denver Federal Center

Entertainment Industries Council

Earthquake Science Center

Pacific Science Center

ATUM (United States)

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Geology of San Francisco

R. W. Graymer Robert Givler John D. Baldwin William R. Lettis Samuel Johnson

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Quaternary geology of Contra Costa County, and surrounding parts of Alameda, Marin, Sonoma, Solano, Sacramento, and San Joaquin counties, California: a digital database

Antarctica A Keystone in a Changing World (1997)

E.J. Helley R. W. Graymer

Contra Costa County is located at the northern end of the Diablo Range of Central California. It is bounded on the north by Carquinez Strait, through which flows 27 percent of California's surface water runoff. San Francisco Bay forms the western boundary, the San Joaquin Valley borders it on the east and the Livermore Valley forms the southern boundary. Contra Costa is one of the nine Bay Area counties with streams that are tributaries to San Francisco Bay. Most of the county is mountainous with steep rugged topography. Mount Diablo, in the center of the county, is one of the highest peaks in the Bay Area, reaching an elevation of 1173 meters (3,849 ft). Contra Costa County is covered by twenty-five 7.5' topographic Quadrangles shown on the index map (ccq_quad or Sheet 2). However, two of the quadrangles (Hayward and Petaluma Point) contain no Quaternary deposits in Contra Costa County, and so are not discussed herein. The Quaternary deposits in Contra Costa County comprise two distinct depositional environments. One, forming a transgressive sequence of alluvial fan and fan-delta deposits, is mapped in the western four-fifths of the county. The second, forming a combination of eolian dune and river delta deposits, is mapped in the San Joaquin Valley in the eastern part of the county.

San Joaquin

10.3133/ofr9798

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Status of three-dimensional geological mapping and modeling activities in the U.S. Geological Survey

Donald S. Sweetkind R. W. Graymer Debra K. Higley Oliver S. Boyd

Geologic map

Geological survey

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Citations (1)

Seismotectonic Implications Of Clustered Regional GPS Velocities In The San Francisco Bay Region, California

AGU Fall Meeting Abstracts (2012)

R. W. Graymer Robert Simpson

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Citations (1)

CRUSTAL STRUCTURE OF THE SIERRA NEVADA, CALIFORNIA: INSIGHTS FROM MAGNETIC AND GRAVITY DATA

Abstracts with programs - Geological Society of America (2021)

V. E. Langenheim R. W. Graymer Warren J. Nokleberg

10.1130/abs/2021cd-362965

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Citations (1)

NEW GEOLOGIC MAP COMPILATION, WITH REVISED TECTONOSTRATIGRAPHIC INTERPRETATION, OF THE SIERRA NEVADA, CALIFORNIA AND NEVADA

Abstracts with programs - Geological Society of America (2024)

R. W. Graymer Matt ONeal C. J. Gutierrez

Geologic map

10.1130/abs/2024am-401916

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Geologic and geophysical maps of the eastern three-fourths of the Cambria 30' x 60' quadrangle, central California Coast Ranges

Scientific investigations map (2014)

R. W. Graymer V. E. Langenheim Michelle Roberts Kristin McDougall

The Cambria 30´ x 60´ quadrangle comprises southwestern Monterey County and northwestern San Luis Obispo County. The land area includes rugged mountains of the Santa Lucia Range extending from the northwest to the southeast part of the map; the southern part of the Big Sur coast in the northwest; broad marine terraces along the southwest coast; and broadvalleys, rolling hills, and modest mountains in the northeast. This report contains geologic, gravity anomaly, and aeromagnetic anomaly maps of the eastern three-fourths of the 1:100,000-scale Cambria quadrangle and the associated geologic and geophysical databases (ArcMap databases), as well as complete descriptions of the geologic map units and the structural relations in the mapped area. A cross section is based on both the geologic map and potential-field geophysical data. The maps are presented as an interactive, multilayer PDF, rather than more traditional pre-formatted map-sheet PDFs. Various geologic, geophysical, paleontological, and base map elements are placed on separate layers, which allows the user to combine elements interactively to create map views beyond the traditional map sheets. Four traditional map sheets (geologic map, gravity map, aeromagnetic map, paleontological locality map) are easily compiled by choosing the associated data layers or by choosing the desired map under Bookmarks.

Quadrangle

Geologic map

Geological survey

10.3133/sim3287

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Citations (5)

Landslides and Cities: An Unwanted Partnership

Special publications (2011)

Richard J. Pike David G. Howell R. W. Graymer

This chapter contains sections titled: Introduction Landslides, an Urban Problem Persistence of Urban Landsliding Toward Landslide-Resistant Cities Concluding Observations

Persistence (discontinuity)

10.1029/sp056p0187

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Citations (12)

Supplemental Material: Geologic framework of Mount Diablo, California

R. W. Graymer V. E. Langenheim

Geologic Map of Mount Diablo<br>

Mount

10.1130/mwr.s.15148989.v1

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Geologic map and map database of northeastern San Francisco Bay region, California: Most of Solano County and parts of Napa, Marin, Contra Costa, San Joaquin, Sacramento, Yolo, and Sonoma Counties

R. W. Graymer David L. Jones Earl E. Brabb

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 in the mapped area. Together with the accompanying text file (nesfmf.ps, nesfmf.pdf, nesfmf.txt), it provides current information on the geologic structure and stratigraphy of the area covered. 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 1:62,500 or smaller.

San Joaquin

Geologic map

Geological survey

Lithology

Bedrock

Quadrangle

10.3133/mf2403

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Citations (13)