| Gray Mesa Formation | |
|---|---|
| Stratigraphic range: | |
| Type | Formation |
| Unit of | Madera Group |
| Sub-units | See text |
| Underlies | Atrasado Formation |
| Overlies | Sandia Formation |
| Thickness | 192 m (630 ft) |
| Lithology | |
| Primary | Limestone |
| Other | Shale, sandstone, conglomerate |
| Location | |
| Coordinates | 34°39′22″N 107°07′12″W / 34.656°N 107.120°W |
| Region | New Mexico |
| Country | United States |
| Type section | |
| Named for | Gray Mesa (Mesa Aparejo) |
| Named by | Kelley and Wood |
| Year defined | 1946 |
  Gray Mesa Formation (the United States)  Gray Mesa Formation (New Mexico) | |
The Gray Mesa Formation is a geologic formation in New Mexico. Its fossil assemblage dates the formation to the Moscovian age of the Pennsylvanian.
The formation as presently defined includes outcrops previously assigned to many local units, including the Los Moyos Formation, the Armendaris Group, and the Nakaye Formation.