Rockdale Run Formation | |
---|---|
Stratigraphic range: Lower Ordovician | |
Type | Formation |
Unit of | Beekmantown Group |
Underlies | Pinesburg Station Dolomite |
Overlies | Stonehenge Limestone |
Thickness | 2450 ft[1] |
Lithology | |
Primary | Limestone |
Other | dolomite, chert |
Location | |
Region | Maryland, Pennsylvania, Virginia[2] and West Virginia |
Country | United States |
The Rockdale Run Formation is a geologic formation in Maryland, Pennsylvania, Virginia and West Virginia.[1] It preserves fossils dating back to the Ordovician period.