| Glenwoody Formation | |
|---|---|
| Stratigraphic range: | |
 Quartzite of the Glenwoody Formation at the base of the Pilar Cliffs, New Mexico, United States | |
| Type | Formation |
| Unit of | Vadito Group |
| Underlies | Hondo Group |
| Overlies | lower Vadito Group |
| Thickness | 300 m (980 ft) |
| Lithology | |
| Primary | Quartz–muscovite schist |
| Other | Quartzite |
| Location | |
| Coordinates | 36°15′57″N 105°47′44″W / 36.2659°N 105.7956°W |
| Region | Picuris Mountains, New Mexico |
| Country | United States |
| Type section | |
| Named for | Glenwoody mining camp |
| Named by | Bauer and Williams |
| Year defined | 1989 |
  Glenwoody Formation (the United States)  Glenwoody Formation (New Mexico) | |
The Glenwoody Formation is a geological formation that is exposed in the cliffs southeast of the Rio Grande Gorge near the town of Pilar and in a few other locations in the Picuris Mountains.[1] Its minimum age from detrital zircon geochronology is 1.693 Mya, corresponding to the Statherian period.
- ^ Bauer 2004, p. 219