Iowa Heritage Digital Collections
State Library of Iowa

Browse Items (748 total) for Calvin Geological Photographs

Sontty Hills, Delhi Township, south of Earlville, Iowa, late 1890s or early 1900s

Sontty Hills, Delhi Township, south of Earlville, Iowa, late 1890s or early 1900s

Bluff next to the Maquoketa River on the eastern side of "Devil's Backbone", Dundee, Iowa, late 1890s or early 1900s

Bluff next to the Maquoketa River on the eastern side of "Devil's Backbone", Dundee, Iowa, late 1890s or early 1900s

Core of till, mantled with loess, looking south across Anamosa, Wyoming Road, Anamosa, Iowa, July 8, 1924

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).
Loess and Iowan till, Windsor Township, Iowa, July 10, 1924

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.
Pebble band on Iowan till, Fremont Township, Iowa, July 8, 1924

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

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

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.
Nebraskan till, Nebraskan gumbotil and Kansan till, Douglas Township, July 24, 1924

Nebraskan till, Nebraskan gumbotil and Kansan till, Douglas Township, July 24, 1924

Located in Douglas Twp., near middle of line between Sections 28 & 33.
Nebraskan gumbotil with till above (Kansan) and till below, concretions below and pebbles above mark the gumbotil, Poe Township, Iowa, July 25, 1924

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.
Kansan till and gumbotil with Illinoian till above on the back of Gus Miller's farm, Washington Township, June 21, 1924

Kansan till and gumbotil with Illinoian till above on the back of Gus Miller's farm, Washington Township, June 21, 1924

Located in Washington Twp. southeast corner Section 28.
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