Iowa Heritage Digital Collections
State Library of Iowa

Browse Items (748 total) for Calvin Geological Photographs

Kames, Thornton, Iowa, late 1890s or early 1900s
Kansan gumbotil with Illinoian till above on Miller Farm, Washington Township, Iowa, July 10, 1925
Kansan gumbotil with Iowan till above, gumbotil line marked by cleared area and field bag, Wayne Township, Iowa, July 08, 1924
Kansan gumbotil with Iowan till above, Lincoln Township, Iowa, June 24, 1925
Kansan gumbotil, Lincoln Township, Iowa, June 21, 1925
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