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Collection: Calvin Geological Photographs
Browse Items (748 total) for Calvin Geological Photographs
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Mouth of Lizard Creek, Fort Dodge, Iowa, late 1890s or early 1900s
Exposure, showing loess under drift, Afton Junction, 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
Cliff of Upper Coal Measure Limestone, Earlham, Iowa, late 1890s or early 1900s
Characteristic weathering of gypsum, Fort Dodge, 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
Dakota Formation with clays and shales, Sioux Paving Brick Company, Riverside, Iowa, late 1890s or early 1900s
Bluffs of Kettle Creek, Millersville, Iowa, late 1890s or early 1900s
Located below Millersville.
Diabase ledge and riffle in Split Rock Creek, Ristie's Farm, Corson, S.D., late 1890s or early 1900s
Canyon in Sioux Quartzite, Dell Rapids, South Dakota, late 1890s or early 1900s
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