Lago Colhué Huapí Formation
{{Infobox rockunit
| name = Lago Colhué Huapí Formation
| type = Geological formation
| period = Maastrichtian
| age = Campanian-Maastrichtian
~{{fossil range|80|66}}
| prilithology = Tuff
| otherlithology = Sandstone
| namedfor = Lake Colhué Huapí
| region = Central Patagonia
| country = Argentina
| coordinates = {{coord|45.6|S|68.5|W|display=inline,title}}
| paleocoordinates = {{coord|48.2|S|55.2|W|display=inline}}
| unitof = Chubut Group
| underlies = Laguna Palacios Formation and Río Chico Group (Salamanca Formation)
| overlies = Bajo Barreal Formation
| thickness =
| extent = Golfo San Jorge Basin
| map = {{Location map+ | Argentina
| relief = 1
| width = 250
| float = center
| places =
{{Location map~ | Argentina
| lat_deg = -45.6
| lon_deg = -68.5
| mark = Lightgreen pog.svg
| marksize = 12
}}
}}
}}
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.Casal et al., 2015
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.Clyde et al., 2014
Vertebrate paleofauna
Taxa recovered from the Lago Colhué Huapí Formation include the sauropods Aeolosaurus, and Argyrosaurus, as well as the hadrosaurid Secernosaurus and the probable elasmarian ornithopod Sektensaurus.Martínez et al., 2016Casal et al., 2007Mannion & Otero, 2012 The dubious possible ceratopsian Notoceratops was also present. The apex predator was an unnamed megaraptorid.
= Dinosaurs =
{{paleobiota-key-compact}}
== Ornithischians ==
| class="wikitable" align="center" | ||||||
| colspan="7" align="center" | Ornithopods reported from the Lago Colhué Huapí Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Locality | Stratigraphic position | Material | Notes | Images |
| style="background:#E6E6E6;
|N. bonarelli | | Upper. | An incomplete, toothless left dentary. | A dubious specimen that belongs to a ceratopsian family. | | ||||||
| Secernosaurus
| S. koerneri | Rio Chico | Upper | A partial skeleton. | A Saurolophinae hadrosaur. | ||||||
| Sektensaurus
|S. sanjuanboscoi | Ephemeral island. | Upper | An associated partial skeleton. | An elasmarian ornithopod. | |
== Sauropods ==
| class="wikitable" align="center" | ||||||
| colspan="7" align="center" | Sauropods reported from the Lago Colhué Huapí Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Locality | Stratigraphic position | Material | Notes | Images |
| Aeolosaurus
|A. colhuehuapensis | Ephemeral island. | Upper | A partial skeleton | A titanosaur. | ||||||
| Argyrosaurus
| A. superbus | La Angostura, Río Chico. | Upper | A set of limb elements (left forelimb). | A titanosaur. | ||||||
| Elaltitan
|E. lilloi | Río Senguerr bend | Lower | A partial skeleton. | A titanosaur. | |
= Reptiles =
| class="wikitable" align="center" | ||||||
| colspan="7" align="center" | Reptiles reported from the Lago Colhué Huapí Formation | ||||||
|---|---|---|---|---|---|---|
| Genus | Species | Locality | Stratigraphic position | Material | Notes | Images |
| Colhuehuapisuchus
|C. lunai | Ephemeral island | Upper. | A mandible (Anterior portion of mandibles). | A peirosaurid notosuchian. | |
See also
References
{{reflist|20em}}
= Bibliography =
- {{citation |last1=Casal |first1=Gabriel A. |last2=Allard |first2=José O. |last3=Foix |first3=Nicolás |year=2015 |title=Análisis estratigráfico y paleontológico del Cretácico Superior en la Cuenca del Golfo San Jorge: Nueva unidad litoestratigráfica para el Grupo Chubut |url=http://ppct.caicyt.gov.ar/index.php/raga/article/viewFile/4843/5521 |journal=Revista de la Asociación Geológica Argentina |volume=72 |pages=77–95 |accessdate=2019-02-16 }}{{Dead link|date=September 2024 |bot=InternetArchiveBot |fix-attempted=yes }}
- {{citation |last1=Casal |first1=G. |last2=Martínez |first2=R.D. |first3=M. | last3 = Luna | first4 = J. C. | last4 = Sciutto | first5 = M. | last5 = Lamanna |year=2007 |title=Aeolosaurus colhuehuapensis sp. nov. (Sauropoda, Titanosauria) de la Formación Bajo Barreal, Cretácico Superior de Argentina | trans-title = Aeolosaurus colhuehuapensis sp. nov. (Sauropoda, Titanosauria) from the Bajo Barreal Formation, Upper Cretaceous of Argentina |url=https://www.researchgate.net/publication/236852201 |journal=Revista Brasileira de Paleontologia |volume=10 |issue=1 |pages=53–62 |doi=10.4072/rbp.2007.1.05 |accessdate=2019-02-23}}
- {{citation |last1=Clyde |first1=W.C. |last2=Wilf |first2=P. |last3=Slingerland |first3=Iglesias A. |last4=Barnum |first4=T. |last5=Bijl |first5=P.K. |year=2014 |title=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 |url=https://www.researchgate.net/publication/263033543 |journal=Geological Society of America Bulletin |volume=126 |issue=3–4 |pages=289–306 |doi=10.1130/B30915.1 |bibcode=2014GSAB..126..289C |accessdate=2019-02-23|hdl=11336/80135 |hdl-access=free }}
- {{citation |last=Cortés |first=José María |year=1986 |title=Estratigrafía y tectónica de la región central de la Provincia de Chubut, República Argentina (PhD thesis) |url=https://digital.bl.fcen.uba.ar/download/tesis/tesis_n1975_Cortes.pdf |publisher=Universidad de Buenos Aires |pages=1–242 |accessdate=2019-02-16}}
- {{citation |last1=Mannion |first1=P.D. |last2=Otero |first2=A. |year=2012 |title=A reappraisal of the Late Cretaceous Argentinean sauropod dinosaur Argyrosaurus superbus, with a description of a new titanosaur genus |url=https://www.researchgate.net/publication/235635155 |journal=Journal of Vertebrate Paleontology |volume=32 |issue=3 |pages=614–638 |doi=10.1080/02724634.2012.660898 |hdl=11336/197194 |accessdate=2019-02-23|hdl-access=free }}
- {{citation |last1=Martínez |first1=R.D.F. |last2=Lamanna |first2=M.C. |author3-link=Fernando Novas |last3=Novas |first3=F.E. |last4=Ridgely |first4=R.C. |last5=Casal |first5=G.A. |last6=Martínez |first6=J.E. |year=2016 |title=A Basal Lithostrotian Titanosaur (Dinosauria: Sauropoda) with a Complete Skull: Implications for the Evolution and Paleobiology of Titanosauria |doi=10.1371/journal.pone.0151661 |journal=PLoS ONE |volume=11 |issue=4 |pages=e0151661 |doi-access=free |pmid=27115989 |pmc=4846048 |bibcode=2016PLoSO..1151661M }}
- {{citation |last1=Weishampel |first1=David B. |author2-link=Peter Dodson |last2=Dodson |first2=Peter |author3-link=Halszka Osmólska |last3=Osmólska |first3=Halszka |year=2004 |title=The Dinosauria, 2nd edition |url=https://books.google.com/books?id=vtZFDb_iw40C |publisher=Berkeley: University of California Press |pages=1–880 |accessdate=2019-02-21 |isbn=0-520-24209-2 |author1-link=David B. Weishampel }}
Category:Geologic formations of Argentina
Category:Upper Cretaceous Series of South America
Category:Maastrichtian Stage of South America
Category:Fossiliferous stratigraphic units of South America
Category:Paleontology in Argentina