Geologic cross section I-I' through the Appalachian basin from the eastern margin of the Illinois Basin, Jefferson County, Kentucky, to the Valley and Ridge Province, Scott County, Virginia
Scientific investigations map ;
Geological Survey (U.S.), cartographer.
Ryder, Robert T., cartographer.
Trippi, Michael H., cartographer.
Swezey, C. (Christopher), cartographer.
by Robert T. Ryder, Michael H. Trippi, and Christopher S. Swezey.
Geologic cross section I-I' through the Appalachian basin from the eastern margin of the Illinois Basin, Jefferson County, Kentucky, to the Valley and Ridge Province, Scott County, Virginia