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

• Paleontology portal

• 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