Iowa Heritage Digital Collections
State Library of Iowa

Browse Items (748 total) for Calvin Geological Photographs

Erosion in till and loess, Cass Township, Iowa, July 18, 1924
Dean G.F. Kay's car, after wind storm
Granite boulder, 24x21x10 feet, Union Township, Iowa, June 20, 1924
Iowan Drift area topography, Spring Rock Township, Iowa, June 18, 1925
Kansan topography, Welton Township, Iowa, June 18, 1925
Two tills and two loesses, Iowa, June 18, 1925
Iowan Drift area topography, Boulder Township, Iowa, June 19, 1925
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