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Men on pile of boulders, Forest City township, Iowa, July 4, 1925

Forest City Twp., lane between sections 13 and 32

Frank Leverett, George F. Kay, and Paul MacClintock in the field, Lime Springs, Iowa, July 4, 1925

George F. Kay, Frank Leverett, and Paul MacClintock in the field at the Nebraskan gumbotil outcrop 4 miles northeast of Ricketts, Iowa, July 1925

Geology Club on the steps of Old Science Hall, The University of Iowa, May 24, 1916

Geology Club, The University of Iowa, January 26, 1942

Man standing in cut for the foundation of women's gymnasium shows Loess overlying Buchanan Gravels, The University of Iowa, late 1890s or early 1900s

People near Dakota and Benton formations near Old Crills Mill on Sioux River below Westfield, Iowa, late 1890s or early 1900s

People with horse and cart at base of eroded surface of gypsum beds, Fort Dodge, Iowa, late 1890s or early 1900s

Men and boys surrounding “Jumbo” artesian well, Belle Plaine, Iowa, late 1890s or early 1900s

Artesian well/Jumbo well, 3 ft in diameter at surface, 195 deep through fine sand and blue clay. Bored with 2 inch drill. Water broke out. pressure 35 lbs to sq in.

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