Iowa Heritage Digital Collections
State Library of Iowa

Browse Items (48 total)

Rocks in the valley of the Yellow River, Iowa, late 1890s or early 1900s

Rocks in the valley of the Yellow River, Iowa, late 1890s or early 1900s

Located in Twp. 96, R.V., Section 14, S.W. gr., N.W. 1/4.
Columns of St. Croix sandstone, Iowa, late 1890s or early 1900s

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.
Gorge in Trenton Limestone at Pinney's Spring, Iowa, late 1890s or early 1900s

Gorge in Trenton Limestone at Pinney's Spring, Iowa, late 1890s or early 1900s

Located in Twp. 95, R.V. Section 34, S.W. gr. N.W. 1/4.
Owl's Head Mountain capped by Oneota Limestone (a hill of circumdenudation over 300 feet high), Iowa, late 1900s or early 1900s

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.
Gorge in Trenton Limestone at Pinney's Spring, Iowa, late 1890s or early 1900s

Gorge in Trenton Limestone at Pinney's Spring, Iowa, late 1890s or early 1900s

Located in Twp. 95, R.V. Section 34, S.W. gr., N.W. 1/4.
Oneota valley from the south and peneplain, Iowa, late 1890s or early 1900s

Oneota valley from the south and peneplain, Iowa, late 1890s or early 1900s

Located in Twp. 99, R. VI, Section 36, N.W. gr., S.E. 1/4 in northeast Iowa.
Bluff on Upper Iowa River (formerly Oneota River), Saint Croix capped by Oneota, height 300 ft. plus, 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.
Sixty foot high bluff of Oneota (massive above) with cherty partings at base, Iowa, late 1890s or early 1900s

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.
Bluff, Iowa, late 1890s or early 1900s

Bluff, Iowa, late 1890s or early 1900s

Located in Twp., 100, R.W. Section 14, N.W. gr., S. 1/2.
Gorge at Pinney's Spring, Iowa, late 1890s or early 1900s

Gorge at Pinney's Spring, Iowa, late 1890s or early 1900s

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