Digital geologic map and map database of parts of Marin, San Francisco, Alameda, Contra Costa, and Sonoma Counties, California

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Description This digital map database, compiled from previously published and unpublished data, and new mapping by the authors, represents the general distribution of bedrock and surficial deposits in the mapped area.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 (mageo.t
Originators Blake, M. Clark, Jr.; Graymer, Russell W.; Jones, D. L.; and Soule, A.
Publication U.S. Geological Survey Miscellaneous Field Studies Map MF-2337

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Overview of attributes

The polygon coverage of geologic units contains unit symbols and
short descriptions.  The units are described more fully in the
accompanying textual report.
The dataset includes a geologic coverage with formations, faults
and dikes, a decoration coverage with fault, dike, caldera, and
fold symbols, a coverage with strike and dip point data, an oil and
gas well location point coverage, a breccia zone overlay coverage,
and a latitude and longitude grid coverage.