Geology of the San Francisco Waterfront

Point Reyes National Seashore Association

Geology of the San Francisco Waterfront


Point Reyes National Seashore Association Point Reyes National Seashore Point Reyes Station, CA 94956	Saturday, Mar. 16, 2013 9:00 AM - 5:00 PM

Details

John Karachewski, Instructor

Discover the interesting geology along the San Francisco waterfront in the Golden Gate National Recreation Area from Fort Mason to the San Andreas Fault in Daly City. San Francisco is underlain by five terranes or blocks comprised of rocks that formed in different plate tectonic settings with fascinating histories. At Fort Mason, we will examine sandstones of the Alcatraz Terrane and the only natural exposure along the northeastern shoreline of the city. At Fort Point we will observe serpentine that formed in the upper mantle of the Farallon Plate and was subsequently accreted to North America. At Lands End, we will hike down to view sandstone and shale turbidites near the former Sutro Baths and explore adjacent sea caves, if wave conditions permit. At our last stop in Daly City, we will visit the edge of the North American Plate near Mussel Rock and discuss the evolution of the San Andreas Fault System. During our trip, we will also learn about Ice Age sand dunes that blanket the city, erosion and sediment transport along Ocean Beach, the 1906 earthquake, natural hazards, and climate change.

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