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Browse Items (130 total)

Mississippi Bluff with Saint Croix at base (300 ft.) and 100 feet Oneota above, Lansing, Iowa, late 1890s or early 1900s

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

Cross-bedding with dark streaks due to glauconite, Lansing, Iowa, late 1890s or early 1900s

Effects of weathering on a bluff of limestone illustrating thin bedding, etc., Iowa, late 1890s or early 1900s

Effects of weathering on a bluff of limestone illustrating thin bedding, etc., Iowa, late 1890s or early 1900s

Located in Twp. 96, R. VI, Section 17, S.E. gr., S.E. 1/4.
Profile of Painted Rock, Waukon Junction, Iowa, late 1890s or early 1900s

Profile of Painted Rock, Waukon Junction, Iowa, late 1890s or early 1900s

Bluff, Waukon Junction, Iowa, late 1890s or early 1900s

Bluff, Waukon Junction, Iowa, late 1890s or early 1900s

Bluff of Oneota Limestone, Waterville, Iowa, late 1890s or early 1900s

Bluff of Oneota Limestone, Waterville, Iowa, late 1890s or early 1900s

Ledge of Trenton Limestone showing effects of weathering, late 1890s or early 1900s

Ledge of Trenton Limestone showing effects of weathering, late 1890s or early 1900s

Located at Twp. 96, R. W. Section 32, N. W. gr., N. W. 1/4.
Bluffs in driftless area showing characteristic distribution of timber sharply limited to northern and northeastern slopes, Iowa, late 1890s or early 1900s

Bluffs in driftless area showing characteristic distribution of timber sharply limited to northern and northeastern slopes, Iowa, late 1890s or early 1900s

Located in Twp. 100, R.V.section 15.
Mouth of cave at Devil's Den, Iowa, late 1890s or early 1900s

Mouth of cave at Devil's Den, Iowa, late 1890s or early 1900s

Located in Twp. 99 R. 5 Section 19 N. W. gr., N. E, 1/4, N. E. corner.
Mount Hope, Union City Township, Iowa, late 1890s or early 1900s

Mount Hope, Union City Township, Iowa, late 1890s or early 1900s

Located north east 34, 100, 5.