This article relies largely or entirely on a single source. (May 2026) |
The Catheys Formation is a Middle Ordovician geologic formation within southeastern Tennessee and northwestern Georgia.
| Catheys Formation | |
|---|---|
| Stratigraphic range: Middle Ordovician | |
| Type | Formation |
| Unit of | Nashville Group, Chickamauga Supergroup |
| Underlies | Inman Formation; Sequatchie Formation |
| Overlies | Cannon Limestone |
| Thickness | up to 250 ft (76 m) |
| Lithology | |
| Primary | Limestone (calcilutite, calcisiltite) |
| Other | Shale |
| Location | |
| Region | Southeastern Tennessee, northwestern Georgia |
| Country | United States |
| Extent | Tennessee and Georgia |
It is the uppermost formation of the Nashville Group, overlying Cannon Limestone and underlying either the Inman or Sequatchie formations depending on locality. The lower part of the formation consists of laminated or thin-bedded calcilutite and calcisiltite interbedded with fine-grained limestone. The middle and upper parts are composed chiefly of irregularly bedded fossiliferous limestone separated by shale partings. The formation contains abundant marine fossils, including brachiopods and bryozoans, indicating deposition in a shallow water marine environment during the Ordovician.[1]
See also
editReferences
edit- ↑ Milici, Robert C.; Smith, James W. (1968). Stratigraphy of the Chickamauga Supergroup in its type area (PDF). Department of Mines, Mining and Geology (Report). Nashville, Tennessee: Government of Georgia. Archived from the original (PDF) on 2015-09-24.
 | This article about a specific stratigraphic formation in Tennessee is a stub. You can help Wikipedia by adding missing information. |