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Calkins, Frank Cathcart

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Cottonwood Region, looking from Peruvian Gulch toward Superior Gulch. Salt Lake County, Utah. Circa 1936. Published in U.S.Geological Survey Professional Paper 201, Plate 7-A. 1943.
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Limestone conglomerate, intraformational, from below lower part of Kenneberg Formation, Reed and Benson Ridges. Salt Lake County, Cottonwood District, Utah. Circa 1936. Published in U.S.Geological Survey Professional paper 201, Plate 13-B. 1943.
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Yosemite National Park, California. Cathedral Peak from near Cathedral Pass, showing joints vertical and summit pinnacles. 1913.
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