| Bull Canyon Formation | |
|---|---|
| Stratigraphic range: | |
| Type | Geological formation |
| Unit of | Dockum Group |
| Underlies | Redonda Formation |
| Overlies | Trujillo Formation |
| Thickness | 110 metres (360 ft) |
| Lithology | |
| Primary | mudstone |
| Other | sandstone, siltstone, conglomerate |
| Location | |
| Region |  New Mexico, Texas |
| Country |  United States |
| Type section | |
| Named for | Bull Canyon (Guadalupe County, New Mexico) |
| Named by | Lucas & Hunt, 1989 |
The Bull Canyon Formation is a geological formation of Late Triassic (Norian) age in eastern New Mexico and the Texas Panhandle. It is one of several formations encompassed by the Dockum Group.
The Bull Canyon Formation preserves reptile fossils of the Revueltian "faunachron", and it is generally considered time-equivalent to the upper Cooper Canyon Formation, which crops out further south in west-central Texas.