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Basement Rocks

Map of California basement rocks.

Map of California basement rocks. The basement rocks in the area of the park—the Great Valley sequence, the Franciscan assemblage (the Franciscan Complex), and Mesozoic granitic rocks (the Salinian complex)—formed in geologic settings associated with an ancient subduction zone (fig. 4). This figure shows the location of the rocks in California today

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US Geological Survey graphic by Irwin (1990, fig. 3.3).

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Fort Point National Historic Site, Code: FOPO
Golden Gate National Recreation Area, Code: GOGA
Muir Woods National Monument, Code: MUWO

Fort Point National Historic Site, San Francisco County, California
Latitude: 37.8084983825684, Longitude: -122.473999023438

Golden Gate National Recreation Area, California
Latitude: 37.8916893005371, Longitude: -122.635803222656

Muir Woods National Monument, Marin County, California
Latitude: 37.8983993530273, Longitude: -122.583999633789

NPS.gov Collection

01/01/0001

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Monday, September 6, 2021 9:28:51 AM

Monday, September 6, 2021 10:39:08 AM

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