Schistose aporphyolite exposed in small quarry west of Bridgeport. Adams County, Pennsylvania.1927.
Dates
Date Taken
1927
Summary
Schistose aporphyolite exposed in small quarry west of Bridgeport; schistosity dips south east. Adams County, Pennsylvania. 1927. Plate 1 in U.S. Geological Survey. Folio 225. 1929.
Summary
Schistose aporphyolite exposed in small quarry west of Bridgeport; schistosity dips south east. Adams County, Pennsylvania. 1927. Plate 1 in U.S. Geological Survey. Folio 225. 1929.
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