| Blackford Formation | |
|---|---|
| Stratigraphic range: Ordovician | |
| Type | Formation |
| Location | |
| Region |  Tennessee |
| Country |  United States |
The Blackford Formation is a geologic formation in Tennessee. It preserves fossils dating back to the Ordovician period.
| Blackford Formation | |
|---|---|
| Stratigraphic range: Ordovician | |
| Type | Formation |
| Location | |
| Region | Tennessee |
| Country | United States |
The Blackford Formation is a geologic formation in Tennessee. It preserves fossils dating back to the Ordovician period.
The Nolichucky Formation is a geologic formation in Virginia and Tennessee. It preserves fossils dating back to the Cambrian period.
The Moccasin Formation is a geologic formation in Virginia and Tennessee. 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 Rome Formation is a geologic formation in Alabama, Georgia, and Tennessee. It preserves fossils dating back to the Cambrian period.
The Grainger Formation is a geologic formation in Tennessee, Kentucky, and Virginia. It preserves fossils dating back to the early Mississippian subperiod of the Carboniferous period.
The Birdsong Shale is a geologic formation in Tennessee. It preserves fossils dating back to the Devonian period.
The Linden Formation is a geologic formation in Tennessee. It preserves fossils dating back to the Devonian period.
The Bigby Formation is a geologic formation in Tennessee. It preserves fossils dating back to the Ordovician period.
The Hermitage Formation is a geologic formation in Tennessee. It preserves fossils dating back to the Ordovician period.
The Inman Formation is a geologic formation in Tennessee. It preserves fossils dating back to the Ordovician period.
The Lebanon Limestone is a geologic formation in Tennessee. It preserves fossils dating back to the Ordovician period.
The Leipers Formation is a geologic formation in Tennessee. It preserves fossils dating back to the Ordovician period.
The Lenoir Formation is a geologic formation in Tennessee. It preserves fossils dating back to the Ordovician period.
The Mannie Formation is a geologic formation in Tennessee. It preserves fossils dating back to the Ordovician period.
The Rockdell Formation is a geologic formation in Tennessee. It preserves fossils dating back to the Ordovician period.
The Sequatchie Formation is a geologic formation in Alabama, Georgia, and Tennessee. It preserves fossils dating back to the Ordovician period.
The Whitesburg Formation is a dark limestone with interbedded shales geologic formation in Tennessee and Virginia. It preserves fossils dating back to the Ordovician period.
The Wayne Formation is a geologic formation in Tennessee. It preserves fossils dating back to the Silurian period.
The Porters Creek Formation is a geologic formation in Tennessee. It preserves fossils dating back to the Paleogene 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.
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