Misplaced Pages

Lago Colhué Huapí Formation

Article snapshot taken from[REDACTED] with creative commons attribution-sharealike license. Give it a read and then ask your questions in the chat. We can research this topic together.
(Redirected from Lago Colhué Huapi Formation)
Lago Colhué Huapí Formation
Stratigraphic range: Campanian-Maastrichtian
~80–66 Ma PreꞒ Ꞓ O S D C P T J K Pg N
TypeGeological formation
Unit ofChubut Group
UnderliesLaguna Palacios Formation and Río Chico Group (Salamanca Formation)
OverliesBajo Barreal Formation
Lithology
PrimaryTuff
OtherSandstone
Location
Coordinates45°36′S 68°30′W / 45.6°S 68.5°W / -45.6; -68.5
Approximate paleocoordinates48°12′S 55°12′W / 48.2°S 55.2°W / -48.2; -55.2
RegionCentral Patagonia
CountryArgentina
ExtentGolfo San Jorge Basin
Type section
Named forLake Colhué Huapí
Lago Colhué Huapí Formation is located in ArgentinaLago Colhué Huapí FormationLago 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.

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.

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. The dubious possible ceratopsian Notoceratops was also present. The apex predator was an unnamed megaraptorid.

Dinosaurs

Color key
Taxon Reclassified taxon Taxon falsely reported as present Dubious taxon or junior synonym Ichnotaxon Ootaxon Morphotaxon
Notes
Uncertain or tentative taxa are in small text; crossed out taxa are discredited.

Ornithischians

Ornithopods reported from the Lago Colhué Huapí Formation
Genus Species Locality Stratigraphic position Material Notes Images
Notoceratops 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. cemter
Sektensaurus S. sanjuanboscoi Ephemeral island. Upper An associated partial skeleton. An elasmarian ornithopod.

Sauropods

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. Center
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

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

  1. ^ Casal et al., 2015
  2. Clyde et al., 2014
  3. Martínez et al., 2016
  4. Casal et al., 2007
  5. Mannion & Otero, 2012

Bibliography

Categories:
Lago Colhué Huapí Formation Add topic