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Fallen masses of limestone, just above the base of Niagaran, Elk Creek, Iowa, 1890s

Dam and Powerhouse, Iowa City, Iowa, 1900s

Folded and fissured limestone, Brandon, Iowa, 1890s

Liberal Arts Building, The University of Iowa, 1900s

Clay pit of Mason City Brick and Tile Company, Mason City, Iowa, late 1890s or early 1900s

Palisades on the Cedar River in winter, Mount Vernon, Iowa, late 1890s or early 1900s

North Hall, Dental Building, and Science Hall behind old oaks, The University of Iowa, 1900s

Iowa River and bluff above Turkey Creek, Iowa City, Iowa, late 1890s or early 1900s

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

Columns of St. Croix sandstone, Iowa, late 1890s or early 1900s

Psychology Laboratory, The University of Iowa, 1911

Old Capitol, The University of Iowa, 1900s

Men by conglomerate basal with lentils of unconformity near base, Montpelier, Iowa, late 1890s or early 1900s

Carboniferous sandstone and shale, showing irregular bedding, Wyoming Hill, Iowa, late 1890s or early 1900s

Morainic knob, Carroll, Iowa, late 1890s or early 1900s

Exposure of Upper Coal Measures, Essex, Iowa, late 1890s or early 1900s

Carboniferous shale, Mena, Ark., late 1890s or early 1900s

The Hall of Natural Science, The University of Iowa, 1908

Anamosa Stage in McCune Quarry, Cedar Township, Iowa, 1890s

Hutchinson's Quarry, Iowa City, Iowa, 1896

North Hall library after fire, University of Iowa, June 19, 1897

Bluff on Upper Iowa River (formerly Oneota River), Saint Croix capped by Oneota, height 300 ft. plus, Iowa, 1890s

Cliffs, Clay Mill, Iowa, late 1890s or early 1900s

Psychology Laboratory, The University of Iowa, 1911

Outlier of Carboniferous sandstone, Iowa City, Iowa, late 1890s or early 1900s

Group of Geology professors and assistants in front of Old Science Hall, The University of Iowa, 1900s

Oneota Limestone as a building stone, Eitzen, Minn., late 1890s or early 1900s

Ledge of Niagaran limestone in Loop's Quarry, Hopkinton, Iowa, late 1890s or early 1900s.

Bluff, Waukon Junction, 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

Moving of Old Science Hall, still on Pentacrest, Old Dental on the left, University of Iowa, 1905

North Hall library after fire, University of Iowa, June 19, 1897

Fishermen in gorge of Oneota River gorge cut in Devonian limestone, Forreston, Iowa, late 1890s or early 1900s

Museum, New Science Building, The University of Iowa, 1900s

Man standing next to timbers and jacks used to move Old Science Hall, University of Iowa, 1905

Fish teeth found in Old State Quarry beds, North Liberty, Iowa, late 1890s or early 1900s

Science Hall on Pentacrest, The University of Iowa, between 1894 and 1897

Devil's Backbone in a small driftless area, Dundee, Iowa, 1890s

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

Cliff above Rawson's Mill. The thick ledge at the summit is Niagara limestone. Iowa, late 1890s or early 1900s

Psychology Laboratory, The University of Iowa, 1911

Lime quarry, Cedar Valley, Iowa, late 1890s or early 1900s

Moving of Old Science Hall, University of Iowa, 1905

Aftonian, Kansan Drift, Buchanan gravels, Illinoian Drift, Sangamon sands, and Loess, Muscatine, Iowa, late 1890s or early 1900s

Old Capitol east facade, The University of Iowa, between 1902 and 1911

Sontty Hills, Delhi Township, south of Earlville, Iowa, 1890s

Castles of limestone in driftless area near line of Illinois Central Railroad, Dubuque, Iowa, late 1890s or early 1900s

University Hospital, The University of Iowa, 1900s