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You are browsing the archive for 2016 January 06.

6 January 2016

Slumped boulder on Marshall’s Beach, San Francisco

The week before the AGU Fall Meeting, San Francisco experienced heavy rain and strong coastal wave action. These two phenomena liberated a big boulder of serpentinite on Marshall’s Beach. As it moved downhill, it opened up a scarp with views into the colluvial soil horizons.

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