Huitrera Formation
The Huitrera Formation is a geological formation in the Neuquén Basin in northern Patagonian Argentina whose strata date back to the Early Eocene of the Paleogene, or Casamayoran in the South American land mammal age classification.
| Huitrera Formation | |
|---|---|
| Stratigraphic range: Early Eocene (Casamayoran) | |
| Type | Geological formation |
| Underlies | Collón Curá Formation |
| Overlies | Angostura Colorada Formation |
| Thickness | Up to 1,300 m (4,300 ft) |
| Lithology | |
| Primary | Mudstone, sandstone |
| Other | Andesites, dacitic & rhyolitic ignimbrites, volcanic breccias, tuffs & trachybasalts |
| Location | |
| Coordinates | 41.0°S 71.2°W |
| Approximate paleocoordinates | 43.5°S 61.2°W |
| Region | Neuquén & Río Negro Provinces |
| Country | Argentina |
| Extent | Neuquén Basin |
| Type section | |
| Named for | Cerro Huitrera |
| Named by | Ravazzoli & Sesana |
| Year defined | 1977 |
Huitrera Formation (Argentina) | |
The formation is together with the Reyhuau basalts part of the Pilcaniyeu Belt, a volcanic belt active in Paleocene to middle Eocene times.
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