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Collection: Calvin Geological Photographs
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Exfoliating granite at Marklesville quadrangle at the summit of the Sierra Nevada, California, late 1890s or early 1900s
Estes Park from verandah of Estes Park Hotel, Estes Park, Colorado, late 1890s or early 1900s
Erosion in till and loess, Cass Township, Iowa, July 18, 1924
Located in Cass Twp., middle of north line of south section 6, just west of Panora.
Erosion and Huronian glaciation of Split Rock Creek, Palisades, S.D., late 1890s or early 1900s
Erosion and Huronian glaciation of Split Rock Creek, Palisades, S.D., late 1890s or early 1900s
Engineers working on mountain, late 1890s or early 1900s
Engineers working on a mountain side, late 1890s or early 1900s
Elk Creek and Elk Mountain, Iowa, late 1890s or early 1900s
Elk Cliff with Coal Measure Sandstone on Des Moines River, Rosseau, Iowa, late 1890s or early 1900s
El Capitan Granite and jointed granite of Yosemite Quadrangle at the summit of ridge south of head of Morrison Creek, Calif., late 1890s or early 1900s
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