Geologic cross section C-C' through the Appalachian basin from Erie County, north-central Ohio, to the Valley and Ridge Province, Bedford County, south-central Pennsylvania [cartographic material] / by Robert T. Ryder ... [et al.] ; U.S. Department of the Interior, U.S. Geological Survey.
Shipping list no.: 2012-0325-P. Includes 1 location map, 1 diagram, and 1 lithologic correlation chart.
- U.S. Geological Survey ;
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