| Grainger Formation | |
|---|---|
| Stratigraphic range: Early Mississippian | |
| Type | Formation |
| Location | |
| Region | Tennessee, Kentucky, Virginia |
| Country | United States |
The Grainger Formation is a geologic formation in Tennessee, Kentucky, and Virginia. It preserves fossils dating back to the early Mississippian subperiod of the Carboniferous period. [1]