Lago Colhué Huapí Formation
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]
| 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 | 45.6°S 68.5°W |
| Approximate paleocoordinates | 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 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, Argyrosaurus, and Elaltitan, as well as the hadrosaurid Secernosaurus and the probable elasmarian ornithopod Sektensaurus.[3][4][5] The ceratopsian Notoceratops was also present. The top predator was an unnamed megaraptorid.[1]
See also
- List of dinosaur-bearing rock formations
References
- Casal et al., 2015
- Clyde et al., 2014
- Martínez et al., 2016
- Casal et al., 2007
- Mannion & Otero, 2012
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