USGS

U.S. Geological Survey
Open-File Report 97-98

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

By: E.J. Helley and R.W. Graymer

1997

thumbnail of map

View README file: cc_q1.ReadMe.txt (24 KB)

View the geologic explanation as a text file: ccqgeo.txt (24 KB)

Download the geologic explanation as a PostScript plot file: ccqgeo.ps (40 KB)

Download the geologic explanation as a PDF file: ccqgeo.pdf (32 KB)

Download the database package in ARC/INFO 7.x uncompressed export format along with supporting materials in a compressed UNIX tar file: cc_q1.tar.Z (16.5 MB, 75.4 MB when uncompressed)

Download three Postscript plottable files containing images of the geologic maps and base maps at a scale of 1:100,000, explanation sheet, and explanatory text in a compressed UNIX tar file: ccqps.tar.Z (9.5 MB compressed download file, 32 MB when uncompressed)

Download the explanation sheet as a PDF file: ccqexpl.pdf (168 KB)

View the geologic map sheet as a JPEG file (base-map removed): ccqmap.jpg (240 KB)

Download the geologic map sheet as a PDF file: ccqmap.pdf (~36" x 29"; 7.1 MB)

Please send comments and suggestions to Russ Graymer



For more information on the geology
of the San Francisco Bay region:
Visit the sfgeo website


tiny map of western U.S. Return to Western Region Geologic Information Home Page
The URL for this page is: https://pubs.usgs.gov/of/1997/of97-098/
Please send report problems to Michael Diggles
Updated: July 10, 2006 (mfd)