Earth:Lago Colhué Huapí Formation
| Lago Colhué Huapí Formation Stratigraphic range: Campanian-Maastrichtian ~80–66 Ma | |
|---|---|
| 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 |
| 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 |
  Lago Colhué Huapí Formation (Argentina) | |
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
- List of dinosaur-bearing rock formations
- List of stratigraphic units with few dinosaur genera
References
Bibliography
- Casal, Gabriel A.; José O. Allard, and Nicolás Foix. 2015. Análisis estratigráfico y paleontológico del Cretácico Superior en la Cuenca del Golfo San Jorge: Nueva unidad litoestratigráfica para el Grupo Chubut. Revista de la Asociación Geológica Argentina 72. 77–95. Accessed 2019-02-16.
- Casal, G.; R.D. Martínez; M. Luna; J. C. Sciutto, and M. Lamanna. 2007. Aeolosaurus colhuehuapensis sp. nov. (Sauropoda, Titanosauria) de la Formación Bajo Barreal, Cretácico Superior de Argentina. Revista Brasileira de Paleontologia 10. 53–62. Accessed 2019-02-23.
- Clyde, W.C.; P. Wilf; Iglesias A. Slingerland; T. Barnum, and P.K. Bijl. 2014. New age constraints for the Salamanca Formation and lower Río Chico Group in the western San Jorge Basin, Patagonia, Argentina: implications for Cretaceous—Paleogene extinction recovery and land mammal age correlations. Geological Society of America Bulletin 126. 289–306. Accessed 2019-02-23.
- Cortés, José María. 1986. Estratigrafía y tectónica de la región central de la Provincia de Chubut, República Argentina (PhD thesis), 1–242. Universidad de Buenos Aires. Accessed 2019-02-16.
- Mannion, P.D., and A. Otero. 2012. A reappraisal of the Late Cretaceous Argentinean sauropod dinosaur Argyrosaurus superbus, with a description of a new titanosaur genus. Journal of Vertebrate Paleontology 32. 614–638. Accessed 2019-02-23.
- Martínez, R.D.F.; M.C. Lamanna; F.E. Novas; R.C. Ridgely; G.A. Casal, and J.E. Martínez. 2016. A Basal Lithostrotian Titanosaur (Dinosauria: Sauropoda) with a Complete Skull: Implications for the Evolution and Paleobiology of Titanosauria. PLoS ONE 11. e0151661. Accessed 2019-02-23.
- Weishampel, David B.; Peter Dodson, and Halszka Osmólska (eds.). 2004. The Dinosauria, 2nd edition, 1–880. Berkeley: University of California Press. Accessed 2019-02-21.ISBN:0-520-24209-2
 |  |
