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Meta-conglomerate of the Kingston Peak Formation | by Ron Wolf
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Meta-conglomerate of the Kingston Peak Formation

Meta-conglomerate or Stretch-Pebble Conglomerate. The Upper Proterozoic Kingston Peak Formation, among the oldest sedimentary rocks in the region, is composed primarily of conglomerate, shale, graywacke and sandstone. The sediments were mostly of glacial origin and deposited in a marine environment. The unit was subjected to metamorphism during a period of crustal compression in early- to mid-Mesozoic time. The meta-conglomerate here shows the effects of compression. Individual pebbles in the conglomerate have been flattened and elongated. Wildrose area. Panamint Range. Death Valley National Park. Inyo Co., Calif.

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Taken on April 17, 2012