Lago Colhué Huapí Formation
Lago Colhué Huapí Formation | |
---|---|
Stratigraphic range: Campanian-Maastrichtian ~ | |
Type | Geological formation |
Unit of | Chubut Group |
Underlies | Laguna Palacios Formation and Río Chico Group (Salamanca Formation) |
Overlies | Bajo Barreal Formation |
Lithology | |
Primary | Tuff |
Other | Sandstone |
Location | |
Coordinates | 45°36′S 68°30′W / 45.6°S 68.5°W |
Approximate paleocoordinates | 48°12′S 55°12′W / 48.2°S 55.2°W |
Region | Central Patagonia |
Country | Argentina |
Extent | Golfo San Jorge Basin |
Type section | |
Named for | Lake Colhué Huapí |
The Lago Colhué Huapí Formation is a Late Cretaceous geologic formation of the Chubut Group in the Golfo San Jorge Basin in Patagonia, Argentina. The formation, named after Lake Colhué Huapí, is overlain by the Salamanca Formation of the Río Chico Group and in some areas by the Laguna Palacios Formation.[1]
The strata of the Lago Colhué Huapé Formation were thought to pertain to the Bajo Barreal Formation, but are now recognized as a distinct stratigraphic unit in their own right.[1][2]
Vertebrate paleofauna
Taxa recovered from the Lago Colhué Huapí Formation include the sauropods Aeolosaurus colhuehaupiensis, and Argyrosaurus, as well as the hadrosaurid Secernosaurus and the probable elasmarian ornithopod Sektensaurus.[3][4][5] The dubious possible ceratopsian Notoceratops was also present. The apex predator was an unnamed megaraptorid.[1]
See also
References
Bibliography
- Geologic formations of Argentina
- Upper Cretaceous Series of South America
- Cretaceous Argentina
- Campanian Stage
- Maastrichtian Stage of South America
- Tuff formations
- Sandstone formations
- Fluvial deposits
- Fossiliferous stratigraphic units of South America
- Paleontology in Argentina
- Golfo San Jorge Basin
- Geology of Patagonia
- Geology of Chubut Province
- Mapuche language