Hale Formation
The Hale Formation is a geologic formation in northern Arkansas that dates to the Morrowan Series of the early Pennsylvanian. 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.
| 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 |
| 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 |
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