As we entered the Panamint Valley, we stopped for an overview of the geology. George Dunne first explained the extensional, half-graben origin of the valley. We could see fairly recent fault scarps and ancient shorelines along the front of the Panamint Range, which is in the right background. In this picture, Bob Howard is describing how the Panamint Valley was alternately filled to form a lake during the Pleistocene glacial periods and drained to form a playa during interglacial stages.
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