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Dark brownish sandstone, Lewis, Iowa, late 1890s or early 1900s
Located on the east side of the road one mile south of Lewis.
Consideration Mine No. 8, Given, Iowa, late 1890s or early 1900s
Upper Coal Measure Limestone, Earlham, Iowa, late 1890s or early 1900s
New workings in quarry in Upper Coal Measures, 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
Elk Cliff with Coal Measure Sandstone on Des Moines River, Rosseau, Iowa, late 1890s or early 1900s
Coal Measure Shale (middle of picture) resting in eroded channel in St. Louis sandstone (seen in lower corners of picture) on Cedar Creek, Bellefontaine, Iowa, late 1890s or early 1900s.
Coal Measure Sandstone and shale at foot of Capitol Hill, Des Moines, Iowa, late 1890s or early 1900s
Cross-bedding in coal measure sandstone, Red Rock, Iowa, late 1890s or early 1900s
Cliff of Upper Coal Measure Limestone, Earlham, Iowa, late 1890s or early 1900s
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