| Gallup Sandstone | |
|---|---|
| Stratigraphic range: | |
 Gallup Sandstone in the Nutria hogback east of Gallup, New Mexico, US, near its principal reference section | |
| Type | Formation |
| Unit of | Mesaverde Group |
| Underlies | Crevasse Canyon Formation |
| Overlies | Mancos Shale |
| Thickness | 71 meters (233 ft) |
| Lithology | |
| Primary | Sandstone |
| Other | Shale, siltstone |
| Location | |
| Coordinates | 35°31′56″N 108°41′28″W / 35.532170°N 108.691030°W |
| Region | New Mexico |
| Country | United States |
| Type section | |
| Named for | Gallup, New Mexico |
| Named by | J.D. Sears |
| Year defined | 1925 |
  Gallup Sandstone (the United States)  Gallup Sandstone (New Mexico) | |
The Gallup Sandstone is a geologic formation in the Gallup-Zuni basin of New Mexico. It preserves fossils dating back to the late Cretaceous period.[1][2][3]