| Polvadera Group | |
|---|---|
| Stratigraphic range: Neogene, | |
 Guaje Ridge, an eroded flow of the Polvadera Group | |
| Type | Group |
| Sub-units | Lobato Formation, Tschicoma Formation, El Rechuelos Rhyolite |
| Underlies | Tewa Group |
| Overlies | Keres Group |
| Thickness | 1,500 m (4,900 ft) |
| Lithology | |
| Primary | Dacite |
| Other | Basalt, andesite, rhyolite |
| Location | |
| Coordinates | 36°03′36″N 106°24′18″W / 36.060°N 106.405°W |
| Region |  New Mexico |
| Country |  United States |
| Type section | |
| Named for | Polvadera Peak |
| Named by | Bailey, Smith, and Ross |
| Year defined | 1969 |
  Polvadera Group (the United States)  Polvadera Group (New Mexico) | |
The Polvadera 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 2.2 million years, corresponding to the Miocene through early Quaternary.