| Baca Formation | |
|---|---|
| Stratigraphic range: | |
 Red beds of the Baca Formation in the Sawtooth Mountains of New Mexico | |
| Type | Formation |
| Underlies | Spears Formation |
| Overlies | Mesaverde Group |
| Thickness | 694 feet (212 m) |
| Lithology | |
| Primary | Conglomerate |
| Other | Sandstone, claystone |
| Location | |
| Coordinates | 34°19′55″N 107°16′19″W / 34.332°N 107.272°W |
| Region | New Mexico |
| Country | United States |
| Type section | |
| Named for | Baca Canyon |
| Named by | R.H. Wilpolt et al. |
| Year defined | 1946 |
  Baca Formation (the United States)  Baca Formation (New Mexico) | |
The Baca Formation is a geologic formation in southern New Mexico and Arizona.[1] It preserves fossils dating back to the Eocene period.[2]