| Reedsville Group | |
|---|---|
| Stratigraphic range: Ordovician | |
| Type | Group |
| Location | |
| Region |  Virginia |
| Country |  United States |
The Reedsville Group is a geologic group in Virginia. It preserves fossils dating back to the Ordovician period.
| Reedsville Group | |
|---|---|
| Stratigraphic range: Ordovician | |
| Type | Group |
| Location | |
| Region | Virginia |
| Country | United States |
The Reedsville Group is a geologic group in Virginia. It preserves fossils dating back to the Ordovician period.
The Conemaugh Group is a geologic group in West Virginia, Pennsylvania, Ohio, and Maryland. It preserves fossils dating back to the Carboniferous period.
The Rochester Shale is a geologic formation exposed in New York and West Virginia. It preserves fossils dating back to the Silurian period.
The Potomac Group is a geologic group in Delaware, Maryland, New Jersey, and Virginia. It preserves fossils dating back to the Cretaceous period. An indeterminate tyrannosauroid and Priconodon crassus, a nodosaurid, are known from indeterminate sediments belonging to the Potomac Group. The Potomac Group was initially believed to have been Late Jurassic in age by Othniel Charles Marsh but later studies, such as Clark (1897), have found that the Potomac Group is in fact Early-Late Cretaceous (Aptian-Turonian) in age.
The Pamunkey Group is a geologic group in Virginia. It preserves fossils dating back to the Paleogene period.
The Tuckahoe Group is a geologic group in Virginia. It preserves fossils dating back to the Triassic period.
The Fido Sandstone is a geologic formation in Virginia. It preserves fossils dating back to the Carboniferous period.
The Little Valley Formation is a geologic formation in Virginia, United States. It preserves fossils dating back to the Carboniferous period.
The Eggleston Formation is a geologic formation in Virginia. It preserves fossils dating back to the Ordovician period.
The Mosheim Limestone is a geological formation in Virginia. It preserves fossils dating back to the Ordovician period.
The Moccasin Formation is a geologic formation in Virginia and Tennessee. It preserves fossils dating back to the Ordovician period.
The Oranda Formation is a geologic formation in Virginia. It preserves fossils dating back to the Ordovician period.
The Chepultepec Formation, is an Early Ordovician-age geological formation in the Appalachian regions of Eastern North America. Also known as the Chepultepec Dolomite, it is a unit of the Upper Knox Group, overlying the Copper Ridge Dolomite and underlying the Longview-Kingsport-Mascot sequence. The Chepultepec Formation is a primarily limestone and dolomite formation, the earliest formation of the Ordovician period in its area. Further north, it is equivalent to the Stonehenge Formation of the Beekmantown Group. The formation was first described from Allgood, Alabama, and has also been found in Tennessee and Virginia. Allgood was originally named "Chepultepec", providing its name to the formation as well. In Virginia, the Chepultepec Formation has a habit of forming large natural arches, including Natural Tunnel in Scott County and Natural Bridge in Rockbridge County.
The Bays Formation is a geologic formation in Virginia. It preserves fossils dating back to the Ordovician period.
The Wardell Formation is a geologic formation in Virginia. It preserves fossils dating back to the Ordovician period.
The St. Marys Formation is a geologic formation in Maryland and Virginia, United States. It preserves fossils dating back to the Miocene Epoch of the Neogene period. It is the youngest Miocene formation present in the Calvert Cliffs and is part of the Chesapeake Group.
The Rome Formation is a geologic formation in Alabama, Georgia, and Tennessee. It preserves fossils dating back to the Cambrian period.
The Java Formation is a geologic formation in Kentucky, New York, Ohio, Pennsylvania, Tennessee, Virginia, West Virginia. It preserves fossils dating back to the Devonian period. The formation comprises the Pipe Creek Shale, Wiscoy Sandstone Member in New York, and Hanover Shale Member except in Tennessee.
The Conasauga Formation is a geologic formation in Georgia. It preserves fossils dating back to the Cambrian period.
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