South of Badwater we stopped in a canyon along the front of the Black Mountains to see one of the detachment faults (arrow). Here the Proterozoic crystalline rocks are overlain in sharp fault contact by Pliocene-lower Pleistocene, well cemented alluvial fan deposits. The contact has a low dip and the age of faulting is obviously very young. Frank Hanna (far left) is wondering why that arrow is hanging up in the sky.
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