George F. Kay, Frank Leverett, and Paul MacClintock examining gumbotil in Iowa, 1925

George F. Kay, Frank Leverett, Paul MacClintock, Ricketts Iowa, Nebraskan gumbotil

George F. Kay, Frank Leverett, and Paul MacClintock, 4 miles NE of Ricketts, IA, at the Nebraskan gumbotil outcrop.  Photo Calvin Photographic Collection. From George Frederick Kay 1873-1943, University of Iowa. Photographed by: Earl T. Apfel, July 1925. 

Frank Leverett did extensive field work in Michigan; this Michigan Digital Geology Library has many of his notebooks.

George F. Kay was my great-grandfather.

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