1. Basement depth and related geospatial database for Pennsylvania;Alexander,2005
2. Berg, T.M., Edmunds, W.E., Geyer, A.R., and et al., Compilers, 1980. Geologic map of Pennsylvania. Pennsylvania Geological Society, 4th series, Map 1, scale 1:250, 000, 3 sheets.
3. Post-Alleghanian unroofing history of the Appalachian Basin, Pennsylvania, from apatite fission track analysis and thermal models;Blackmer;Tectonics,1994
4. The Appalachian Folds of Central Pennsylvania;Chamberlain;J. Geol.,1910
5. Correlation of stratigraphic units of North America – COSUNA (Northern Appalachian Region);Childs;Am. Assoc. Petrol. Geolog. Bull.,1985