Anton Chico Formation
| Anton Chico Formation | |
|---|---|
| Stratigraphic range: | |
| Anton Chico Formation along I-25 in Glorieta Pass. The Anton Chico is the red beds at lower right. Overlying this is tan beds of the Santa Rosa Formation. | |
| Type | Formation | 
| Underlies | Santa Rosa Formation | 
| Overlies | Artesia Group | 
| Thickness | 102 feet (31 m) | 
| Lithology | |
| Primary | Sandstone | 
| Other | Mudstone, Conglomerate | 
| Location | |
| Coordinates | 35°12′28″N 105°08′35″W / 35.2078°N 105.1431°W | 
| Region | New Mexico | 
| Country | United States | 
| Type section | |
| Named for | Anton Chico, New Mexico | 
| Named by | Lucas and Hunt | 
| Year defined | 1987 | 
The Anton Chico Formation is a geologic formation exposed in New Mexico that was deposited in the Anisian Age of the middle Triassic Period.