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Collection: Calvin Geological Photographs
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Mr. Snyder, typical cowboy, on the ranch of Payne and Arnold, Minnekahta, S.D., late 1890s or early 1900s
Mrs. Arnold and children with Snyder on Payne and Arnolds Ranch, Minnekahta, S.D., late 1890s or early 1900s
Museum specimens, New Science Building, University of Iowa, late 1890s or early 1900s
Nebraskan gumbotil with till above (Kansan) and till below, concretions below and pebbles above mark the gumbotil, Poe Township, Iowa, July 25, 1924
Located in Poe Twp., looking north just east of Sections 2, 3, 10, 11.
Nebraskan till and gumbotil, Clay Township, Iowa, June 28, 1925
Located in Clay Twp., near middle of East 1/2 section 19.
Nebraskan till, Nebraskan gumbotil and Kansan till, Douglas Township, July 24, 1924
Located in Douglas Twp., near middle of line between Sections 28 & 33.
New workings in quarry in Upper Coal Measures, Earlham, Iowa, late 1890s or early 1900s
Niagaran Lime quarry, Sugar Creek, Iowa, late 1890s or early 1900s
Niobrara chalk beds of the cement company's works, Yankton, S.D., late 1890s or early 1900s
Niobrara chalk cliffs near Yankton, S.D., late 1890s or early 1900s
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