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Collection: Calvin Geological Photographs
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Champion Quarry, Stone City, Iowa, October 19, 1895
J. A. Green
Man standing near oblique bedding at Sugar Creek lime quarries, Sugar Creek, Iowa, late 1890s or early 1900s
Bealer Quarry, Cedar Valley, Iowa, late 1890s or early 1900s
Bealer Quarry, Cedar Valley, Iowa, late 1890s or early 1900s
Topography of "Steamboat Rock" at "Devil's Backbone" region similar to that of the driftless area, Dundee, Iowa, late 1890s or early 1900s
Undercutting of Gower limestone on Wapsipinicon River, Massillon, Iowa, late 1890s or early 1900s
Elk Creek and Elk Mountain, Iowa, late 1890s or early 1900s
Basal ledges, Washington Mills, Iowa, late 1890s or early 1900s
Quarry east of Earlville, Iowa, late 1890s or early 1900s
Opposite points where the road enters the valley on the west side of "Backbone," Iowa, late 1890s or early 1900s
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