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Collection: Calvin Geological Photographs
Browse Items (748 total) for Calvin Geological Photographs
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Aftonian gravels, Muscatine County, Iowa, late 1890s or early 1900s
School house, Humboldt, Iowa, late 1890s or early 1900s
Capitol City Brick and Pipe Company, Des Moines, Iowa, late 1890s or early 1900s
Old Faithful,Yellowstone National Park, late 1890s or early 1900s
Map of northeastern Iowa with dashed line showing locations of an old drift in patches east of margin of Kansan drift, Iowa, late 1890s or early 1900s
Map of Iowa showing by density of pattern the relative resistances of various areas of rock to erosion, Iowa, late 1890s or early 1900s
President I. J. Griswold home, Winthrop, Iowa, late 1890s or early 1900s
American Association of Geographers Davis Excursion, St. Paul, Minn., 1912
Group photo from the International Geological Conference, Canada, 1913
Bridge over Coon Rapids, Middle Raccoon River, Coon Rapids, Iowa, late 1890s or early 1900s
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