EarthWorks Geospatial Catalog

Rock types of Pennsylvania [cartographic material] / compiled by Thomas M. Berg, W.D. Sevon, and Robin Abel ; James H. Dolimpio, cartographer.

"Base map from Berg and others (1980) Geologic map of Pennsylvania, Pennsylvania Geological Survey, 4th ser., Map 1 scale 1:250,000, 3 sheets." Envelope title: Rock types of Pennsylvania : 1:500,000. On envelope: Commonwealth of Pennsylvania, Department of Environmental Resources, Office of Resources Management, Bureau of Topographic and Geologic Survey, Arthur A. Socolow, State Geologist, 1984. Includes notes.
Commonwealth of Pennsylvania, Dept. of Environmental Resources, Topographic and Geologic Survey
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