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Collection: Calvin Geological Photographs
Browse Items (748 total) for Calvin Geological Photographs
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Nebraskan till, Nebraskan gumbotil and Kansan till, Douglas Township, July 24, 1924
Located in Douglas Twp., near middle of line between Sections 28 & 33.
Pebble band on Iowan till, Fremont Township, Iowa, July 8, 1924
Located in the middle of line between Sections 1 and 2 in Fremont Township.
Covered with Kansan till, Osceloa Township, Iowa, late June 29, 1924
Located in Osceola Twp. in the north half of NE quarter, Section 21.
Pebble band on Iowan till, Fremont Township, Iowa, July 8, 1924
Located in the middle of line between Sections 1 and 2 in Fremont Township.
Loess and Iowan till, Windsor Township, Iowa, July 10, 1924
Located in Windsor Twp., Section 16. Looking south middle of north line of northeast 1/4.
Core of till, mantled with loess, looking south across Anamosa, Wyoming Road, Anamosa, Iowa, July 8, 1924
Located just South of Jackson Twp., Section 24 (Primary 6).
Bluff next to the Maquoketa River on the eastern side of "Devil's Backbone", Dundee, Iowa, late 1890s or early 1900s
Sontty Hills, Delhi Township, south of Earlville, Iowa, late 1890s or early 1900s
Devil's Backbone in a small driftless area, Dundee, Iowa, late 1890s or early 1900s
Located northwestern part of Delaware County, Iowa.
Fallen masses of limestone, just above the base of Niagaran, Elk Creek, Iowa, late 1890s or early 1900s
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