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Collection: Calvin Geological Photographs
Browse Items (748 total) for Calvin Geological Photographs
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"Petrified Bridge" south of Adamano, Ariz., late 1890s or early 1900s
"The Dells" canyon in Sioux Quartzite, Dell Rapids, South Dakota, late 1890s or early 1900s
"The Elephant" formed by Saint Croix sandstone covered by Oneota limestone, French Creek, Iowa, late 1890s or early 1900s
Located near the French Creek Post Office on the upper Iowa or Oneota River. Formation is over 300 feet high.
"The Herald" Mine in Sugar Loaf district, Colorado, late 1890s or early 1900s
"The Mound" residence on west side of a field showing Sioux Quartzite and Huronian glaciation, north of Luverne, Minn., late 1890s or early 1900s
"The Mound", North of Luverne, Minnesota
"Where Winds the Way" Road winding through mountains above Coburn Mill, late 1890s or early 1900s
A.C. Trowbridge, Professor of Geology, The University of Iowa, late 1890s or early 1900s
Abandoned channel of Lime Creek, Mason City, Iowa, late 1890s or early 1900s
Aftonian gravels, Muscatine County, Iowa, late 1890s or early 1900s
Aftonian, Kansan Drift, Buchanan gravels, Illinoian Drift, Sangamon sands, and Loess, Muscatine, Iowa, late 1890s or early 1900s
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