Preliminary integrated geologic map databases for the United States: Delaware, Maryland, New York, Pennsylvania, and Virginia

Online link http://pubs.usgs.gov/of/2005/1325/
Description Digital geologic map information with a consistent set of attributes, part of a national compilation of similar maps. Available in formats compatible with GIS.
Originators Dicken, Connie L.; Nicholson, Suzanne W.; Horton, John D.; Kinney, Scott A.; Gunther, Gregory; Foose, Michael P.; and Mueller, Julia A.L.
Publication U.S. Geological Survey Open-File Report 2005-1325