Ninemile Formation
| Ninemile Shale | |
|---|---|
| Stratigraphic range: Ordovician | |
| Type | Geologic formation |
| Unit of | Pogonip Group |
| Underlies | Antelope Valley Limestone |
| Overlies | Goodwin Limestone |
| Thickness | 550 ft (170 m) |
| Lithology | |
| Primary | Shale |
| Location | |
| Region | Nevada |
| Country | United States |
The Ninemile Shale is a geologic formation in Nevada. It preserves fossils dating back to the Ordovician period.