Rockdale Run Formation

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.

Rockdale Run Formation Stratigraphic range: Lower Ordovician
Rockdale Run Formation in Skyline Caverns, Virginia
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

See also

• List of fossiliferous stratigraphic units in Maryland
• List of fossiliferous stratigraphic units in Pennsylvania
• List of fossiliferous stratigraphic units in Virginia
• List of fossiliferous stratigraphic units in West Virginia

References

1. Geologic Unit: Rockdale Run, USGS
2. Paleozoic Sedimentary Successions of the Virginia Valley & Ridge and Plateau

• Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Archived from the original on 31 July 2014. Retrieved 22 June 2014.