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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.
Quarry of Saint Croix overlain by Oneota limestone, Harpers Ferry, Iowa, late 1890s or early 1900s
Quarry is about 100 feet above base of bluff in Oneota.
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.
Sixty foot high bluff of Oneota (massive above) with cherty partings at base, Iowa, late 1890s or early 1900s
Located in the R.W. Section 16, S.W. gr., N.E. 1/4.
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
Oneota Limestone as a building stone, Eitzen, Minn., late 1890s or early 1900s
Located near north line of Allamakee Co.
Oneota Limestone near Upper Iowa or Oneota River, Iowa, late 1890s or early 1900s
Located in Twp. 99, VI, Section 21.
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.
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.
Mineral Creek valley cut in Oneota limestone, Iowa, late 1890s or early 1900s
Located in Twp. 99, R. VI, Section 14.
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