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Collection: Calvin Geological Photographs
Browse Items (748 total) for Calvin Geological Photographs
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Small spring in Trenton Limestone, west of Devil's Den, Iowa, late 1890s or early 1900s
Mineral Creek valley cut in Oneota limestone, Iowa, late 1890s or early 1900s
Located in Twp. 99, R. VI, Section 14.
Fine quality of quarry stone with evenly bedded limestone about 40 feet above the Saint Croix, Iowa, late 1890s or early 1900s
Located in Twp. 100, R. V. Section 18, N. W. 1/4, N. E. corner.
Yellow River cutting through Prairie du Chien Limestone, Ion, Iowa, late 1890s or early 1900s
Hill formed by circumdenudation with base of leveled plain composed of St. Croix overlain by Oneota limestone, Iowa, late 1890s or early 1900s
Located in Twp. 100, R. V. Sec. 34, N. E. Gr.; south side of Oneota River.
Oneota Limestone near Upper Iowa or Oneota River, Iowa, late 1890s or early 1900s
Located in Twp. 99, VI, Section 21.
North fork Yellow River undermining cliff of St. Peter Sandstone at Devil's Den six miles south of Waukon, Iowa, late 1890s or early 1900s
Projecting block of Galena Limestone, receptaculites horizon 60 feet below top of Galena located southeast of Rockville, Iowa, late 1890s or early 1900s
Mill on the Oneota River , Florenceville, Iowa, late 1890s or early 1900s
Picture taken from bridge at Florenceville.
Oneota Limestone as a building stone, Eitzen, Minn., late 1890s or early 1900s
Located near north line of Allamakee Co.
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