Map 1: West Virginia Geological Survey, I. C. White, State Geologist. Base from U.S. Geological Survey Sheets with corrections and additions by Ray V. Hennen and David B. Reger.
Map 2: Base-U.S. Geological Survey Sheets. West Virginia Geological Survey, I. C. White, State Geologist. Geology by Ray V. Hennen and David B. Reger assisted by R. M. Gawthrop.