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Original Version || Changes Highlighted || Final Version


original version of Paleozoic chart, Atokan Stage


Original Version || Changes Highlighted || Final Version

Younger... || Start || Older...

Original Pennsylvanian stratigraphy discussed in Jewett, J.M.; O'Connor, H.G.; and Zeller, D.E., 1968, Pennsylvanian System, in, Zeller, D.E., (ed.); The stratigraphic succession in Kansas: Kansas Geological Survey, Bulletin, no. 189, pp. 21-43 http://www.kgs.ku.edu/Publications/Bulletins/189/07_penn.html