Monongahela Formation

Monongahela Group Stratigraphic range: Pennsylvanian
Type	Group
Underlies	Dunkard Group
Overlies	Conemaugh Group
Location
Region	West Virginia Pennsylvania Ohio Maryland
Country	United States

The Monongahela Group is a geologic group in West Virginia, Pennsylvania, Ohio, and Maryland. It preserves fossils dating back to the Carboniferous and Permian periods.