Stratigraphic Framework of Cambrian and Ordovician Rocks in the Central Appalachian Basin From Fayette County, Ohio, to Botetourt County, Virginia

Robert T. Ryder, John E. Repetski, and Anita G. Harris,
1996,
U. S. Geological Survey Map Series I-2495

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U.S. Department of the Interior, U.S. Geological Survey
URL: http://pubs.usgs.gov/imap/i-2495/strat.htm
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