By: callanbentley
Image: Pennsylvania Geological Survey
License: Public Domain

Uploaded: 23 Apr 2020
Last Updated: 23 Apr 2020

435 megapixels
25,000 x 17,400 pixels
83.3 in X 58.0 in at 300dpi
0 pixels per inch

Berg, T.M., Edmunds, W.E., Geyer, A.R., Glover, A.D., Hoskins, D.M., MacLachlan, D.B., Root, S.I., Sevon, W.D., and Socolow, A.A., 1980, Geologic map of Pennsylvania (2nd ed.): Pennsylvania Geological Survey, Map 1, scale 1:250,000