Bajo de la Carpa Formation

Geological formation in Argentina

The Bajo de la Carpa Formation is a geologic formation of the Neuquén Basin that crops out in northern Patagonia, in the provinces of Río Negro and Neuquén, Argentina. It is the oldest of two formations belonging to the Río Colorado Subgroup within the Neuquén Group. Formerly, that subgroup was treated as a formation, and the Bajo de la Carpa Formation was known as the Bajo de la Carpa Member. At its base, this formation conformably overlies the Plottier Formation of the older Río Neuquén Subgroup, and it is in turn overlain by the Anacleto Formation, the youngest and uppermost formation of the Neuquén Group. Neuquensuchus universitas, Notosuchus, Peirosaurus, Kinesuchus overoi, and Barrosasuchus neuquenianus
Small nests with eggs inside, found in this formation, probably belonged to the bird Neuquenornis. Fossil wasp nests have also been found in these rocks. |Indetermidate. |
|
|
|
|
|
| Mahuidacursor
|M. lipanglef
|
|
|
| An ornithopod. |
|}

Sauropods reported from the Allen Formation Genus Species Location Stratigraphic position Material Notes ImagesBonitasauraB. salgadoi A titanosaur. InawentuI. oslatus A titanosaur. Overosaurus O. paradasorum A titanosaur. RinconsaurusR. caudamirus A titanosaur. TraukutitanT. eocaudata A titanosaur.

Theropods reported from the Allen Formation Genus Species Location Stratigraphic position Material Notes ImagesAchillesaurus A. manazzoneiUpper A partial skeleton consists of a sacral vertebra, four tail vertebrae, part of the left thighbone, shin, and foot, and the left ilium. An alvarezsaurid. AlvarezsaurusA. calvoi An alvarezsaurid. Llukalkan L. aliocranianus La Invernada site. A partial skull. An abelisaur. NeuquenornisT. rosalesi A well preserved partial skeleton A megaraptoran theropod. VelocisaurusV. unicus A noasaur. ViavenatorV. exxoni An abelisaur.