Iowa Heritage Digital Collections
State Library of Iowa

Browse Items (62335 total)

Topography of Iowan Drift area, Massilon Township, Iowa, July 18, 1925
Kansan gumbotil with Illinoian till above on Miller Farm, Washington Township, Iowa, July 10, 1925
Nebraskan till and gumbotil, Clay Township, Iowa, June 28, 1925
Gravels in till, north of Afton, Iowa, 1925
Piled up outwash of gravels, Calumet, Iowa, July 7, 1925
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