The lower Pennsylvanian unconformity in the central Appalachian Basin [cartographic material] / U.S. Department of the Interior, U.S. Geological Survey ; by Roger E. Thomas and Kenneth J. Englund.

Reston, VA : U.S. Geological Survey ; Denver, CO : For sale by U.S. Geological Survey, Information Services, 1999.

1 map : color ; 89 x 125 cm, on sheet 104 x 147 cm, folded in envelope 30 x 24 cm.

Scale 1:250,000 (W 84°00ʹ--W 80°30ʹ/N 38°30ʹ--N 36°30ʹ).

Relief shown by spot heights.

English

June 01, 2002

Includes text, bibliographical references, 1 location map, 2 cross sections, and 1 chart.

Maps.