| Hayner Ranch Formation | |
|---|---|
| Stratigraphic range: | |
 Dark beds of the Hayner Ranch Formation exposed in the Rincon Hills, New Mexico, USA | |
| Type | Formation |
| Unit of | Santa Fe Group (geology) |
| Underlies | Rincon Valley Formation |
| Overlies | Spears Group |
| Thickness | 2,800 meters (9,200 ft) |
| Lithology | |
| Primary | conglomerate, mudstone, sandstone |
| Location | |
| Coordinates | 32°35′39″N 106°58′45″W / 32.5942°N 106.9791°W |
| Region | New Mexico |
| Country | United States |
| Type section | |
| Named for | Hayner Ranch |
| Named by | Seager et al. |
| Year defined | 1971 |
  Hayner Ranch Formation (the United States)  Hayner Ranch Formation (New Mexico) | |
The Hayner Ranch Formation is a geologic formation found near the San Diego Mountains of New Mexico. It is estimated to have been deposited during the Miocene epoch.[1]