The Bajo de la Carpa Formation can reach 150 metres (490 ft) in thickness in some locations, and consists mainly of
sandstones of various colors, all of
fluvial origin, with thin layers of
mudstone and
siltstone in between. Geological features such as
geodes, chemical nodules, impressions of raindrops, and
paleosols (fossil soils) are commonly found in this formation as well.[1][3]
Fossil content
Reptiles
Vertebrate fossils are abundant within the Bajo de la Carpa Formation:
Small
nests with
eggs inside, found in this formation, probably belonged to the bird Neuquenornis.[3] Fossil
wasp nests have also been found in these rocks.[1][3]
^Rozadilla, Sebastián; Agnolín, Federico; Manabe, Makoto; Tsuihiji, Takanobu; Novas, Fernando E. (September 2021). "Ornithischian remains from the Chorrillo Formation (Upper Cretaceous), southern Patagonia, Argentina, and their implications on ornithischian paleobiogeography in the Southern Hemisphere". Cretaceous Research. 125: 104881.
Bibcode:
2021CrRes.12504881R.
doi:
10.1016/j.cretres.2021.104881.
ISSN0195-6671.
^Filippi, Leonardo S.; Juárez Valieri, Rubén D.; Gallina, Pablo A.; Méndez, Ariel H.; Gianechini, Federico A.; Garrido, Alberto C. (2023). "A rebbachisaurid-mimicking titanosaur and evidence of a Late Cretaceous faunal disturbance event in South-West Gondwana". Cretaceous Research.
doi:
10.1016/j.cretres.2023.105754.
ISSN0195-6671.
Fossa Mancini, E.;
Feruglio, E.; Yussen de Campana, J.C. (1938). "Una reunión de geólogos de YPF y el problema de la terminología estratigráfica ("A YPF geologists' reunion and the problem of stratigraphy terminology")". Boletín de Informaciones Petroleras. 15: 1–67.