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Collection: Calvin Geological Photographs
Browse Items (748 total) for Calvin Geological Photographs
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Buchanan gravels, Winthrop, Iowa, late 1890s or early 1900s
Buchanan gravels, vertical view, in the Illinois Central gravel pit, Independence, Iowa, late 1890s or early 1900s
Buchanan gravels, horizontal view, in the Illinois Central gravel pit, Independence, Iowa, late 1890s or early 1900s
Buchanan Gravels, Earlville, Iowa, late 1890s or early 1900s
Buchanan gravels with boulders of Iowan stage, Illinois Central Gravel Pit, Independence, Iowa, late 1890s or early 1900s
Bridge, Muscatine County, Iowa, late 1890s or early 1900s
Bridge over Sioux River and Sioux Quartzite ledges, Dell Rapids, South Dakota, late 1890s or early 1900s
Bridge over Sioux River, Dell Rapids, South Dakota
Bridge over Coon Rapids, Middle Raccoon River, Coon Rapids, Iowa, late 1890s or early 1900s
Branch of erosional lines on the dissected Kansan Drift Plain, Afton, Iowa, early 1890s or late 1900s
Located southwest of Afton, Iowa.
Brachiopods and Orthidae fossils
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