The USGS has produced an on-line digital catalog of geologic maps and GIS databases for the San Francisco Bay region that are available for viewing and downloading in several different file formats.

HELP AVAILABLE: Click here to learn more about the file formats of our data and how you can use them.

The following index map is linked to this database by county, quadrangle, and areas of special interest. Click on any name to view maps of that region. If a name is not clickable, there are no maps currently available.

To view this geologic map database in a list format, click here.