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Paleontology
in the San Francisco Bay Region

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The geologic structure of the San Francisco Bay region is a complex series of subterranes or blocks which are bounded by faults. Stratigraphic sequences which characterize each of the blocks are different, either because of different rock types or because of different stratigraphic relationships among similar rock types. These stratigraphic differences are due to changes in depositional environments or unconformities and attest to the complex tectonic history of the region.

The purpose of the present study is to describe the Cenozoic stratigraphy of the San Francisco Bay region and correlate between the various formations in order to understand basin history and evolution. Click colored block to see the stratigraphy, age, and environmental interpretations suggested for that block.

Sand Francisco Bay Blcok Sierra Azul Block La Honda Block Block VII Block VI Block V Block IV Block III Block II Block I Blocks Image Map

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The URL of this page is http://sfgeo.wr.usgs.gov/sfbay/blocks.html
Updated: 19 March 2002

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