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

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

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

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

Quarry pond, Iowa City, Iowa, ca. 1918

Quarry pond, Iowa City, Iowa, ca. 1918

View looking southeast, toward Old Capitol in background.

Quarry pond, Iowa City, Iowa, ca. 1918

Quarry pond, Iowa City, Iowa, ca. 1918

West of Iowa River, Law Commons, and Art Building West.

Quarry pond, Iowa City, Iowa, April 10, 1916

Quarry pond, Iowa City, Iowa, April 10, 1916

West of Iowa River, near Law Commons and Art Building West.

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

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

Quarry is about 100 feet above base of bluff in Oneota.

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

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

Quarry is about 100 feet above base of bluff in Oneota.

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

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

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

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

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

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