Iowa Heritage Digital Collections
State Library of Iowa

Browse Items (1210 total)

Waukon Sphinx left by unequal weathering, Waukon, Iowa, late 1890s or early 1900s

Waukon Sphinx left by unequal weathering, Waukon, Iowa, late 1890s or early 1900s

Iron mine, Waukon, Iowa, late 1890s or early 1900s

Iron mine, Waukon, Iowa, late 1890s or early 1900s

Located at Waukon, Northeast of, Twp. 99, R. VI, Section 36, N. W. gr., S. E. 1/4
Summit of Table Mound in driftless area, Dubuque, Iowa, late 1890s or early 1900s

Summit of Table Mound in driftless area, Dubuque, Iowa, late 1890s or early 1900s

Hill above New Albin, Minn., late 1890s or early 1900s

Hill above New Albin, Minn., late 1890s or early 1900s

Picture taken from Iron Monument marking boundary between Iowa and Minnesota.
Small spring in Trenton Limestone, west of Devil's Den, Iowa, late 1890s or early 1900s

Small spring in Trenton Limestone, west of Devil's Den, Iowa, late 1890s or early 1900s

Fine quality of quarry stone with evenly bedded limestone about 40 feet above the Saint Croix, Iowa, late 1890s or early 1900s

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

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

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

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

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

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