San Francisco Bay Region Geology and Geologic Hazards
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A cooperative project with the California Geological Survey Geologic Map IntroductionThe rocks and fossils of the San Francisco Bay region reveal that the geology there is the product of millions of years at the active western margin of North America. The result of this history is a complex mosaic of geologic materials and structures that form the landscape. A geologic map is one of the basic tools to understand the geology, geologic hazards, and geologic history of a region. This section of the Web site includes:
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