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You are browsing the archive for 29 December 2015 - Mountain Beltway.

29 December 2015

Serpentinite mélange on Marshall’s Beach

South of the Golden Gate Bridge in San Francisco, there are beachside exposures of serpentinite mélange: tectonically sheared-out former oceanic crust accreted to western North America as part of an accretionary wedge.

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