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Business district with sandstone hills and bed of Cenozoic -- Miocene, Hot Springs, South Dakota, late 1890s or early 1900s

Business district with sandstone hills and bed of Cenozoic -- Miocene, Hot Springs, South Dakota, late 1890s or early 1900s

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.
People on stairway at""Devil's Backbone", Backbone State Park, Dundee, Iowa, late 1890s or early 1900s

People on stairway at""Devil's Backbone", Backbone State Park, Dundee, Iowa, late 1890s or early 1900s

Outlier of Niagaran limestone in Williams Quarry, Clermont, Iowa, late 1890s or early 1900s

Outlier of Niagaran limestone in Williams Quarry, Clermont, Iowa, late 1890s or early 1900s

Quarry with Niagaran Limestone and Le Claire limestone, Sugar Creek, Iowa, late 1890s or early 1900s

Quarry with Niagaran Limestone and Le Claire limestone, Sugar Creek, Iowa, late 1890s or early 1900s

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.
Flat railroad cars in Champion Quarry, Stone City, Iowa, late 1890s or early 1900s

Flat railroad cars in Champion Quarry, Stone City, Iowa, late 1890s or early 1900s

Bluffs on Upper Iowa or Oneota River, Decorah, Iowa, late 1890s or early 1900s

Bluffs on Upper Iowa or Oneota River, Decorah, 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.
Cliffs above the mill, Clay Mill, Iowa, late 1890s or early 1900s

Cliffs above the mill, Clay Mill, Iowa, late 1890s or early 1900s