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Columns of St. Croix sandstone, Iowa, late 1890s or early 1900s
Located on Lane's Farm, Twp. 100, NR. IV, Section 31, N.W. gr., N.W. 1/4.
Mississippi Bluff with Saint Croix at base (300 ft.) and 100 feet Oneota above, Lansing, Iowa, late 1890s or early 1900s
Fourth bluff below.
Cross-bedding with dark streaks due to glauconite, Lansing, Iowa, late 1890s or early 1900s
Willard Bacon's homestead below a Valley cut in St. Croix sandstone, Iowa, late 1890s or early 1900s
Overlying Saint Croix sandstone, fold and dip shows beyond Bridge, dark line above railway marking the base of the Oneota, Quandahl, Iowa, late 1890s or early 1900s
Bluff on Upper Iowa River (formerly Oneota River), Saint Croix capped by Oneota, height 300 ft. plus, Iowa, late 1890s or early 1900s
Bear Creek, near the south of Allamakee Co.
Owl's Head Mountain capped by Oneota Limestone (a hill of circumdenudation over 300 feet high), Iowa, late 1900s or early 1900s
Located in Twp. 99, R.V. Section I, N.W. gr.
Columns of St. Croix sandstone, Iowa, late 1890s or early 1900s
Located on Lane's Farm, Twp. 100, NR. IV, Section 31, N.W. gr., N.W. 1/4.
Mississippi Bluff with Saint Croix at base (300 ft.) and 100 feet Oneota above, Lansing, Iowa, late 1890s or early 1900s
Fourth bluff below.
Cross-bedding with dark streaks due to glauconite, Lansing, Iowa, late 1890s or early 1900s
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