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Pinnacles NM | Bear Gulch
WI_ca084.jpg Pinnacles NM  |  Bear Gulch Thumbnails Coast ranges  |  Blue oak

The rocks characterizing this national monument (later upgraded to a national park) represent rhyolithes and andesites going back to an ancient volcano ripped apart by tectonic movements along the San Andreas Fault.

Created
Friday 05 October 2007 by Martin Mergili (590 visits)