Point Reyes National Seashore
A large slump is an impressive landscape feature at Palomarin Beach. At low tide a plunging anticline is exposed in a wave-cut platform below the toe of the great slump. Dipping marine- terrace deposits unconformably overlie marine mudrocks of the Late Miocene-age Santa Cruz Mudstone. These marine terrace deposits are offset by rotation of the large slump block. The terrace deposits are best observed from the beach (see fig. 9-42). The Point Reyes headlands are in the distance.
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Last modified: 1/18/2011