Sandstone near base of Conemaugh formation near Johnstown. Cambria County, Pennsylvania. 1906.
Dates
Date Taken
1906
Summary
Sandstone near base of Conemaugh formation near Johnstown. Cambria County, Pennsylvania. 1906. Plate 3-B in U.S. Geological Survey. Bulletin 447. 1911.
Summary
Sandstone near base of Conemaugh formation near Johnstown. Cambria County, Pennsylvania. 1906. Plate 3-B in U.S. Geological Survey. Bulletin 447. 1911.
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