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Trip Guides

The following guides are provided in order to assist in field trip planning. Please be aware that the conditions associated with a given stop might have changed since the guide was written and scouting prior to the actual trip is recommended. If you would like help in planning a trip, have any feedback about these trips, or have other field trips you would like to share please contact Ryan Petterson.

San Francisco Area Trip Guides

Field Trip to the Skyline Ridge Region in the Santa Cruz Mountains

Trip highlights: fault scarps, sag ponds, vegetation and bedrock contrasts, regional vistas, Quaternary gravels, Tertiary marine rocks, ancient submarine landslide deposits, volcanic rocks (Mindego Basalt), Indian mortar holes in sandstone

The San Andreas and San Gregorio Fault Systems in San Mateo County

Trip highlights: San Andreas Fault along the I-280 and Skyline Boulevard corridor, and at Mussel Rock Park; Calero Limestone at Rockaway State Beach; Devil's Slide; Montara Mountain granite; Seal Cove Fault, the San Gregorio Fault System; geologic structures exposed along the coast at Montara State Beach, James V. Fitzgerald Marine Reserve, and at Pillar Point on Half Moon Bay

The San Andreas Fault Trail in the Los Trancos Open Space Preserve

Trip highlights: regional vistas, conglomerate boulders, Crystal Springs Reservoir and San Andreas Lake, sag ponds, pressure ridges, fault scarps and benches, landslides, fault-related springs and other landscape features

Earthquake Trail along the San Andreas in Sanborn County Park

Trip highlights: fault scarps, shutter ridges, sag ponds, landslides, fractured walls, offset streams, offset alluvial fan

Other California Trip Guides

The California Geotour website has an extensive selection of field trip guides throughout California organized by region. Check it out if you are thinking of venturing outside of the local area!