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The High Plateaus of Utah include seven separate mountain ranges that supported glaciers during the Pleistocene. The Fish Lake Plateau, located on the eastern edge of the High Plateaus, preserves evidence of at least two glacial advances. Four cosmogenic 3 He exposure ages of boulders in an older moraine range from 79 to 159ka with a mean age of 129±39ka and oldest ages of 152±3 and 159±5ka...
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