Keres Group
| Keres Group | |
|---|---|
| Stratigraphic range: Mid-Late Miocene ~ | |
St Peters Dome, a mountain underlain by Keres Group beds | |
| Type | Group |
| Sub-units | See text |
| Underlies | Polvadera & Tewa Groups |
| Overlies | Santa Fe Group |
| Thickness | 900 m (3,000 ft) |
| Lithology | |
| Primary | Andesite |
| Other | Basalt, dacite, rhyolite |
| Location | |
| Coordinates | 35°47′46″N 106°32′49″W / 35.796°N 106.547°W |
| Region | New Mexico |
| Country | United States |
| Extent | Jemez Mountains |
| Type section | |
| Named for | Keresean Range (see text) |
| Named by | Bailey, Smith & Ross |
| Year defined | 1969 |
The Keres Group is a group of geologic formations exposed in and around the Jemez Mountains of northern New Mexico. Radiometric dating gives it an age of 13 to 6 million years, corresponding to the Miocene epoch.