Log Springs Formation
| Log Springs Formation | |
|---|---|
| Stratigraphic range: | |
Log Springs Formation at Guadelupe Box | |
| Type | Formation |
| Underlies | Osha Canyon Formation |
| Overlies | Arroyo Penasco Group |
| Thickness | 25 m (82 ft) |
| Lithology | |
| Primary | Ferruginous shale |
| Other | Sandstone |
| Location | |
| Region | New Mexico |
| Country | United States |
| Type section | |
| Named for | Log Springs (35°38′49″N 106°51′30″W / 35.6469884°N 106.858237°W) |
| Named by | A.K. Armstrong |
| Year defined | 1955 |
The Log Springs Formation is a geologic formation in the Jemez, Nacimiento, and Sandia Mountains of New Mexico. Its age is poorly constrained but is thought to be Namurian (late Mississippian to early Pennsylvanian).