| Stones River Group Stratigraphic range: Ordovician | |
|---|---|
| Type | Group |
| Underlies | Hermitage Formation and Nashville Group |
| Overlies | Knox Dolomite |
| Location | |
| Region | Alabama, Mississippi, and Tennessee |
| Country |  United States |
The Stones River Group is a geologic group in Tennessee. 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 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 Bowen Formation is an Ordovician-age geological formation in the Appalachian region of the eastern United States. It occupies a thin stratigraphic range between the Wardell and Witten formations in some areas of southwest Virginia and northeast Tennessee. It is particularly well-exposed in Tazewell County, Virginia. Unlike its encompassing strata, the Bowen Formation is mostly calcareous sandstone and mudrock rather than limestone. The thicker upper part of the formation is composed of layered red mudrock which is replete with mudcracks. The thinner lower part, which is not always preserved, is a coarser unit of dark grey stratified sandstone which weathers to a rusty-brown color. Fossils are rare, restricted to stromatolites and Tetradium fibratum.
The Rome Formation is a geologic formation in Tennessee. It preserves fossils dating back to the Cambrian period.
The Newman Formation is a geologic formation in Tennessee. It preserves fossils dating back to the Carboniferous period.
The Pewee Coal is a geologic formation in Tennessee. It preserves fossils dating back to the Carboniferous period.
The Blackford 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 Lebanon Limestone 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 Murfreesboro Limestone 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 Wilcox Formation is a geologic formation in Tennessee. It preserves fossils dating back to the Paleogene period.
The Brownsport Group is a geologic group 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 Midway Group is a geologic group in Tennessee, Arkansas, Mississippi, Louisiana, Texas and Alabama. 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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