| Espinaso Formation | |
|---|---|
| Stratigraphic range: Late Eocene to Early Oligocene | |
 Volcaniclastic beds of the Espinaso Formation at Arroyo del Tuerto | |
| Type | Formation |
| Underlies | Tanos Formation |
| Overlies | Galisteo Formation |
| Thickness | 430 m (1,410 ft) |
| Lithology | |
| Primary | Volcaniclastic |
| Location | |
| Coordinates | 35°24′24″N 106°19′06″W / 35.4065805°N 106.3183249°W |
| Region | Central New Mexico |
| Country | United States |
| Type section | |
| Named for | Espinaso Ridge |
| Named by | K. Bryan and J.E. Upson |
  Espinaso Formation (the United States)  Espinaso Formation (New Mexico) | |
The Espinaso Formation is a geologic formation in New Mexico. It has a radiometric age of 34.6 to 26.9 million years, corresponding to the late Eocene through Oligocene epochs.