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Champion Quarries, Stone City, Iowa, late 1890s or early 1900s

Oblique bedding at Sugar Creek lime quarries, Sugar Creek, Iowa, late 1890s or early 1900s

Man standing near oblique bedding at Sugar Creek lime quarries, Sugar Creek, Iowa, late 1890s or early 1900s

Iowa River as a characteristic stream of the drift covered area, Old Capital Quarries, Iowa, late 1890s or early 1900s

Man standing by oblique bedding in Sugar Creek lime quarries, Sugar Creek, Iowa, late 1890s or early 1900s

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

Hutchinson's Quarry, Iowa City, Iowa, 1896

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

Man at O'Toole Quarry, Independence, Iowa, late 1890s or early 1900s

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

Man at O'Toole Quarry, Independence, Iowa, 1890s

Kuppinger Quarry, Mason City, Iowa, 1890s

Bealer Quarry, Cedar Valley, Iowa, late 1890s or early 1900s

Atwood Quarry, Iowa, late 1890s or early 1900s

Bealer Quarry, Cedar Valley, Iowa, late 1890s or early 1900s

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

Man in Connell's Quarry, Iowa, early 1890s or late 1900s

Bealer Quarry, Cedar Valley, Iowa, late 1890s or early 1900s

Champion Quarry, Stone City, Iowa, October 19, 1895

Quarry with lower quarry beds of Niagaran, Farley, Iowa, late 1890s or early 1900s

Old Capitol Quarry, Iowa City, Iowa, late 1890s or early 1900s

Bealer Quarry, Cedar Valley, Iowa, late 1890s or early 1900s

E.J.C. Bealer's Quarry, Cedar Valley, Iowa, late 1890s or early 1900s

Fish teeth from the Upper Devonian, Old State Quarry beds, North Liberty, Iowa, late 1890s or early 1900s

E.J.C. Bealer's Quarry, view looking down the river, Cedar Valley, Iowa, late 1890s or early 1900s

Anamosa Stage, Niagaran overlain by boulder, and till containing streaks of sand at F. Thielman's Quarry, LeClaire, Iowa, late 1890s or early 1900s

New workings in quarry in Upper Coal Measures, Earlham, Iowa, late 1890s or early 1900s

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

Fish teeth found in Old State Quarry beds, North Liberty, Iowa, 1890s

Quarry in Anamosa Stage of Niagaran, Le Claire, Iowa, late 1890s or early 1900s

Quarry east of Earlville, Iowa, 1890s

Lower quarry beds, Twin Springs, Iowa, late 1890s or early 1900s

Quarry, Olin, Iowa, late 1890s or early 1900s

Quarry in Galena Limestone, Dubuque, Iowa, late 1890s or early 1900s

Base of Redrock Bluff at the east end of Redrock Quarry, Iowa, late 1890s or early 1900s

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

Crew of men near lower quarry beds, east of Farley, Iowa, late 1890s or early 1900s

Crest of redrock sandstone near west end of quarry, Red Rock, Iowa, late 1890s or early 1900s

Quarry in Galena Limestone, Twin Springs, Iowa, late 1890s or early 1900s

City Quarry, Independence, Iowa, 1890s

Quarry with Niagaran Limestone and Le Claire limestone, Sugar Creek, Iowa, 1890s

Quarry in Upper Coal Measures, old workings showing separation of stone into ledges, Earlham, Iowa, late 1890s or early 1900s

Quarry in Devonian dolomite near the Oneota River north of the bridge, Forreston, Iowa, late 1890s or early 1900s

Niagaran Lime quarry, Sugar Creek, Iowa, late 1890s or early 1900s

Quarry of Saint Croix overlain by Oneota limestone, Harpers Ferry, Iowa, late 1890s or early 1900s

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

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

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