| Hale Formation | |
|---|---|
| Stratigraphic range: Pennsylvanian | |
 Outcrop of the Cane Hill Member of the Hale Formation | |
| Type | Formation |
| Unit of | none |
| Sub-units | Cane Hill Member, Prairie Grove Member |
| Underlies | Bloyd Formation |
| Overlies | Pitkin Formation |
| Thickness | few feet to over 300 feet[1] |
| Lithology | |
| Primary | Limestone, Sandstone |
| Other | Conglomerate, Shale |
| Location | |
| Region | Arkansas, Kansas |
| Country | United States |
| Type section | |
| Named for | Hale Mountain, Washington County, Arkansas |
| Named by | J.A. Taff[2] |
The Hale Formation is a geologic formation in northern Arkansas that dates to the Morrowan Series of the early Pennsylvanian.[3] The Hale Formation has two named members: the Cane Hill and the Prairie Grove Members. The lower member is the Cane Hill, a primarily sandstone and shale interval that unconformably overlies the Mississippian-age Pitkin Formation. The upper member, the Prairie Grove Member, is predominately limestone and conformably underlies the Bloyd Formation.
- ^ McFarland, John David (2004) [1998]. "Stratigraphic summary of Arkansas" (PDF). Arkansas Geological Commission Information Circular. 36: 13–14. Archived from the original (PDF) on 2016-12-21. Retrieved 2018-05-26.
- ^ Taff, J. (1905). "Description of the Tahlequah quadrangle". U.S. Geologic Survey Geologic Atlas of the United States. 122: 2, 3.
- ^ Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Archived from the original on 31 July 2014. Retrieved 8 July 2014.