Tin Mountain Fault Exposed at Ubehebe Crater.
Ubehebe Crater is the largest and youngest in a field of recently formed volcanic features at the north end of the Cottonwood Mountains. It sits astride the Tin Mountain Fault, a normal, range-front fault exhibitiing most of the vertical displacemnt on the west side of the Cottonwood Mountains. In this view of the north wall of the crater, the conglomerates and volcanics of the Miocene Navadu Formation on the right are abutting later Pleistocene sediments on the left. The vertical dispacement appears to on the order of a few hundred meters. The area is overlain by a layer of black cinders and other pyroclastics ejected during the period of recent volcanism responsible for Ubehebe and a dozen smaller craters in the area. The layer of cinders is displaced by 10 m. by very recent movement on the fault. Death Valley National Park. Inyo Co., Calif.