Harry Williams, Historical Geology * PENNSYLVANIAN - PERMIAN. 1. Paleogeography The Pennsylvanian opened with the Kaskaskia Regression, which left a widespread erosional…
Harry Williams, Historical Geology * HISTORICAL GEOLOGY LECTURE 10. LATE PALEOZOIC GEOLOGY I. The Late Paleozoic (Devonian-Mississippian-Pennsylvanian-Permian) is noted for…