Pennsylvania Coal History of Pittsburgh Deltas Fossils Dictionary Appalachian Mountains Sea over North America Glaciers Slag Map of Field Sites Site References History Home Page

The Geological History Of Pittsburgh Credits Information at this site was researched and written by John P. Tagg. Research mentored and made possible by Dr. Kathi Beratan Web site design and construction by Nick Yankanich Redesign and reorganization (12/29/00) by Dr. Mike Ramsey