Hispanopedia WikiThe Cincinnati Group is a geologic group in Kentucky, Ohio and Indiana. It is Upper Ordovician in age. This geologic group is made up of member formations: Drakes Formation, Whitewater Formation, Liberty Formation, Arnheim Formation, Grant Lake Limestone, Miamitown Shale, Fairview Formation, and Kope Formation. There are also several members of the respective formations.[1] Most of these formations are highly fossiliferous.
Stratigraphy
Drakes Formation
The Drakes Formation is a geologic formation in Kentucky. It preserves fossils dating back to the Ordovician period.
The Drakes Formation was named by Weir for outcrops near the East Fork of Drakes Creek in the Paint Lick quadrangle, southwestern east-central Kentucky.[2] This formation ranges from 20 ft to 150 ft thick, thinning northward. It includes four members, Saluda Dolomite Member, Preachersville Member, Rowland Member and Bardstown Member. These formations are made up of interbedded limestone and shale with units of dolomite ranging from a few inches to a few feet think.
Whitewater Formation
The Whitewater Formation is a geologic formation in Ohio and Indiana. It preserves fossils dating back to the Ordovician Period.[3]
The Whitewater was first named by J. M. Nickles in 1903.[4] He described exposures of limestone and interbedded calcareous shale along the Whitewater River at Richmond, Wayne County, Indiana.
An excellent exposure of the Whitewater Formation is a roadcut located on Route 27 south of Richmond, Indiana, at 39.7877 N, -84.9014 W. It is typically called "Richmond South" in field guides and other publications.
Fossiliferous slab
Rugosa corals
Small brachiopod
Another brachiopod
Liberty Formation
The Liberty Formation is a geologic formation in Ohio and Indiana. It preserves fossils dating back to the Ordovician Period.
Waynesville Formation
The Waynesville Formation is a geologic formation in Ohio and Indiana. It preserves fossils from the Late Ordovician Period.
Paleofauna
El Grupo Cincinnati ha producido muchos animales fósiles. La estratigrafía del Grupo Cincinnati es compleja y las diferentes unidades constituyentes (Formaciones Elkhorn, Liberty, Saluda y Whitewater) se interpretan como un sistema complejo y contemporáneo de ambientes lateralmente equivalentes. [ 5 ]
Cefalópoda
Artrópodos
Véase también
Referencias
- ↑ Davis, RA (1986). «Región de Cincinnati: Estratigrafía del Ordovícico cerca de la esquina suroeste de Ohio». Sección Sureste de la Sociedad Geológica de América . Sociedad Geológica de América. págs. 21–24 . doi : 10.1130/0-8137-5406-2.21 . ISBN 978-0-8137-5406-2. Consultado el 16 de junio de 2025 .
- ↑ Caliza de Calloway Creek y formaciones Ashlock y Drakes (Ordovícico Superior) en el centro-sur de Kentucky (Informe). Servicio Geológico de los Estados Unidos. 1965. doi : 10.3133/b1224d .
- ↑ "Geolex — Whitewater" . ngmdb.usgs.gov . Consultado el 16 de junio de 2025 .
- ↑ Nickles, JM, 1903, El Grupo Richmond en Ohio e Indiana y sus subdivisiones, con una nota sobre el género Strophomena y su tipo: American Geologist, vol. 32, págs. 202–218.
- ↑ Davis, Richard (1998). "MUESTREANDO EL PASTEL DE CAPAS QUE NO ES: LA ESTRATIGRAFÍA Y LA PALEONTOLOGÍA DEL CINCINNATIENSE TIPO" (PDF) .
- ↑ "Localidad de Dodges Creek" .
- 1 2 3 4 5 Collins, Horace (1970). "Fósiles de Ohio" (PDF) .
- ↑"Endoceras proteiforme". Atlas of Ordovician Life. 2013-12-06. Retrieved 2026-04-29.
- ↑"Warren county site".
- ↑"Treptoceras duseri". Atlas of Ordovician Life. 2013-12-06. Retrieved 2026-04-29.
- Geologic groups of Kentucky
- Geologic groups of Ohio
- Geologic groups of Indiana
- Ordovician Kentucky
- Ordovician Ohio
- Ordovician Indiana
- Lagerstätten
