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Collection: Calvin Geological Photographs
Browse Items (748 total) for Calvin Geological Photographs
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North valley wall showing gradation from Iowan aqueous and silts upward into loess one mile north of Helman sand pit, Iowa City, Iowa, late 1890s or early 1900s
Wide portion of Iowa River Valley above the Upper Interuban Bridge, looking toward the construction of the gorge, Iowa City, Iowa, late 1890s or early 1900s
Topographic setting of the first Interurban cut (north of the Upper Interurban bridge) with folded and contorted Buchanan Gravels, Iowa City, Iowa, late 1890s or early 1900s
Iowa City
East ridge bordering the North Liberty Plain near Cemetery Hill, North Liberty, Iowa late 1890s or early 1900s
Located three miles north of North Liberty.
Section (1) of Buchanan Gravels, folded and contorted by the Iowan Ice Sheet in first Interurban cut
Iowa City, north of the Upper Interurban Bridge
Section (3) of Buchanan gravels folded and contorted by the Iowan Ice Sheet in the first Interurban cut, Iowa, late 1890s or early 1900s
Located north of the upper Interurban bridge.
Wide portion of the Iowa River Valley as seen from the north valley wall above the Upper Interuban Bridge, Iowa, late 1890s or early 1900s
Close view of materials in north face of gully exposure, showing Buchanan gravels at bottom, yellow Loess at top, silt and residual material intervening, Iowa, late 1890s or early 1900s.
Located 1/4 mile south of Black Springs.
Section (2) of Buchanan Gravels folded and contorted by the Iowan Ice Sheet in the first Interurban cut, Iowa, late 1890s or early 1900s
Located north of the upper Interurban bridge.
Topographic map of the Fairfax quadrangle, Iowa, late 1890s or early 1900s
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