| Bull Fork Formation | |
|---|---|
| Stratigraphic range: Ordovician | |
 Bull Fork Formation exposed in southern Ohio | |
| Type | Formation |
| Underlies | Drakes Formation |
| Overlies | Grant Lake Formation |
| Lithology | |
| Primary | Limestone |
| Other | Shale |
| Location | |
| Region | Ohio and Kentucky |
| Country | United States |
The Bull Fork Formation is a geologic formation in north central Kentucky and southwestern Ohio. It preserves fossils dating back to the Ordovician period.[1]
John H. Peck assigned strata previously called the Arnheim, Waynesville, Liberty, and Whitewater Formations in Kentucky to the Bull Fork Formation.[2][3]
- ^ Geolex for Bull Fork
- ^ G.P. Wahlman (1992). "Middle and Upper Ordovician symmetrical univalved mollusks (Monoplacophora and Bellerophontina) of the Cincinnati Arch region". Geological Survey Professional Paper. doi:10.3133/PP1066O. ISSN 0096-0446. Wikidata Q61047072.
- ^ John H. Peck (1966). "Upper Ordovician formations in the Maysville area, Kentucky" (PDF). U.S. Geological Survey Bulletin. 1244: B21–22. doi:10.3133/B1244B. ISSN 8755-531X. Wikidata Q61460922.