Iowa Heritage Digital Collections
State Library of Iowa

Browse Items (130 total)

Old green shales bed of the Lower Trenton with natural size Orthis Dlamanella,subeauata, con. and Orthis Tricenaria con, Waukon, Iowa, late 1890s or early 1900s

Old green shales bed of the Lower Trenton with natural size Orthis Dlamanella,subeauata, con. and Orthis Tricenaria con, Waukon, Iowa, late 1890s or early 1900s

Effects of weathering on a bluff of Trenton Limestone, Postville, Iowa, late 1890s or early 1900s

Effects of weathering on a bluff of Trenton Limestone, Postville, Iowa, late 1890s or early 1900s

Located in Twp. 96, R. VI, Section 17, S.E. gr., S.E. 1/4 north of Postville.
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.
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.
Terrace of Wisconsin age near Lansing, Iowa, late 1890s or early 1900s

Terrace of Wisconsin age near Lansing, Iowa, late 1890s or early 1900s

Man standing at top of waterfall in Devil's Den, Iowa, late 1890's or early 1900s

Man standing at top of waterfall in Devil's Den, Iowa, late 1890's or early 1900s

"Devil's Den" located at Twp. 99, R. V, Section 19, N.W. gr., N.E. 1/4, N.E. corner.
Top picture: Dodgeville peneplain at an elevation of 1260 ft., Asbury, Iowa, 1920s. Bottom picture: Lancaster peneplain northeast of Waukon, Iowa, 1920s

Top picture: Dodgeville peneplain at an elevation of 1260 ft., Asbury, Iowa, 1920s. Bottom picture: Lancaster peneplain northeast of Waukon, Iowa, 1920s

"The Elephant" formed by Saint Croix sandstone covered by Oneota limestone, French Creek, Iowa, late 1890s or early 1900s

"The Elephant" formed by Saint Croix sandstone covered by Oneota limestone, French Creek, Iowa, late 1890s or early 1900s

Located near the French Creek Post Office on the upper Iowa or Oneota River. Formation is over 300 feet high.
Driftless area looking down into Iowa River gorge, Iowa, late 1890s or early 1900s

Driftless area looking down into Iowa River gorge, Iowa, late 1890s or early 1900s

Yellow River and bluff below Buckland, Iowa, late 1890s or early 1900s

Yellow River and bluff below Buckland, Iowa, late 1890s or early 1900s

Located N.E.S.E. 16, Twp. 96, 4.
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