| Ninemile Shale | |
| Type: | Geologic formation |
| Age: | Ordovician |
| Period: | Ordovician |
| Prilithology: | Shale |
| Region: | Nevada |
| Unitof: | Pogonip Group |
| Underlies: | Antelope Valley Limestone |
| Overlies: | Goodwin Limestone |
| Thickness: | 550feet |
The Ninemile Shale is a geologic formation in Nevada. It preserves fossils dating back to the Ordovician period.