Geology at Point Reyes National Seashore and Vicinity, California: a Guide to San Andreas Fault Zone and the Point Reyes Peninsula
Geology at Point Reyes National Seashore and Vicinity, California: A Guide to San Andreas Fault Zone and the Point Reyes Peninsula Trip highlights: San Andreas Fault, San Gregorio Fault, Point Reyes, Olema Valley, Tomales Bay, Bolinas Lagoon, Drakes Bay, Salinian granitic rocks, Franciscan Complex, Tertiary sedimentary rocks, headlands, sea cliffs, beaches, coastal dunes, Kehoe Beach, Duxbury Reef, coastal prairie and maritime scrublands Point Reyes National Seashore is an ideal destination for field trips to examine the geology and natural history of the San Andreas Fault Zone and the North Coast of California. The San Andreas Fault Zone crosses the Point Reyes Peninsula between Bolinas Lagoon in the south and Tomales Bay in the north. The map below shows 13 selected field trip destinations where the bedrock, geologic structures, and landscape features can be examined. Geologic stops highlight the significance of the San Andreas and San Gregorio faults in the geologic history of the Point Reyes Peninsula. Historical information about the peninsula is also presented, including descriptions of the aftermath of the Great San Francisco Earthquake of 1906. Figure 9-1. Map of the Point Reyes National Seashore area. Numbered stops include: 1) Visitor Center and Earthquake Trail, 2) Tomales Bay Trail, 3) Point Reyes Lighthouse, 4) Chimney Rock area, 5) Drakes Beach, 6) Tomales Bay State Park, 7) Kehoe Beach, 8) McClures Beach, 9) Mount Vision on Inverness Ridge, 10) Limantour Beach, 11) Olema Valley, 12) Palomarin Beach, 13) Duxbury Reef 14) Bolinas Lagoon/Stinson Beach area. Features include: Point Reyes (PR), Tomales Bay (TB), Drakes Estero (DE), Bolinas Lagoon (BL), Point Reyes Station (PRS), San Rafael (SR), and San Francisco (SF), Lucas Valley Road (LVR), and Sir Francis Drake Boulevard (SFDB).
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