The Bajo Barreal Formation is a geological
formation
Formation may refer to:
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* Back-formation, the process of creating a new lexeme by removing or affixes
* Word formation, the creation of a new word by adding affixes
Mathematics and science
* Cave formation or speleothem, a secondar ...
in the
Golfo San Jorge Basin
The Golfo San Jorge Basin ( es, Cuenca del Golfo San Jorge) is a hydrocarbon-rich sedimentary basin located in eastern Patagonia, Argentina. The basin covers the entire San Jorge Gulf and an inland area west of it, having one half located in San ...
of
Chubut and
Santa Cruz, Argentina whose strata date back to the
Middle Cenomanian to
Late Turonian. The formation was first described by Teruggi & Rossetto in 1963.
[Casal et al., 2016, p.55] The
sandstone
Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) silicate grains. Sandstones comprise about 20–25% of all sedimentary rocks.
Most sandstone is composed of quartz or feldspar (both silicates ...
s,
claystones,
mudstones,
conglomerates and
tuff
Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption. Following ejection and deposition, the ash is lithified into a solid rock. Rock that contains greater than 75% ash is considered tuff, while rock ...
were deposited in a
fluvial environment
Environment most often refers to:
__NOTOC__
* Natural environment, all living and non-living things occurring naturally
* Biophysical environment, the physical and biological factors along with their chemical interactions that affect an organism or ...
. The upper part of formation is laterally equivalent to the
Yacimiento El Trébol and
Meseta Espinosa Formation and the lower part to the
Laguna Palacios,
Cañadón Seco
Cañadón Seco is a village and municipality in Santa Cruz Province in southern Argentina
Argentina (), officially the Argentine Republic ( es, link=no, República Argentina), is a country in the southern half of South America. Argent ...
and
Comodoro Rivadavia Formations. The Bajo Barreal Formation is a
reservoir rock
A petroleum reservoir or oil and gas reservoir is a subsurface accumulation of hydrocarbons contained in porous or fractured rock formations.
Such reservoirs form when kerogen (ancient plant matter) is created in surrounding rock by the presence ...
in the Golfo San Jorge Basin.
[Sywan, 2001, p.131]
Vertebrate paleofauna
Dinosaurs
Indeterminate abelisauroids and titanosaurs have been recovered from the formation
;Other fossils
Other fossils found in the formation include:
[Casal, 2016, p.58]6 km north of Estancia "Ocho Hermanos"
at Fossilworks.org
* '' Bonapartemys bajobarrealis''
* '' Prochelidella argentinae''
* Anura indet.
* Chelonia indet.
* Crocodylia indet.
* Pterosauria indet.
See also
* List of dinosaur-bearing rock formations
This list of dinosaur-bearing rock formations is a list of geologic formations in which dinosaur fossils have been documented.
Containing body fossils
* List of stratigraphic units with dinosaur body fossils
** List of stratigraphic units with ...
* Mata Amarilla Formation
The Mata Amarilla Formation is a fossiliferous formation of the Austral Basin in southern Patagonia, Argentina. The formation consists of sediments deposited during the Middle Cenomanian, dated to 96.94 to 95.52 Ma. The middle section of the fo ...
, contemporaneous formation of the Austral Basin
* Lisandro Formation, contemporaneous formation of the Neuquén Basin
Neuquén Basin ( es, Cuenca Neuquina) is a sedimentary basin covering most of Neuquén Province in Argentina. The basin originated in the Jurassic and developed through alternating continental and marine conditions well into the Tertiary. The bas ...
References
Bibliography
*
*
*
* {{ISBN, 0-520-24209-2
Further reading
* G. Casal and L. Ibiricu. 2010. Materiales asignables a ''Epachthosaurus'' Powell, 1990 (Sauropoda: Titanosauria), de la Formación Bajo Barreal, Cretácico Superior, Chubut, Argentina aterials assignable to Epachthosaurus Powell, 1990 (Sauropoda: Titanosauria), from the Bajo Barreal Formation, Upper Cretaceous, Chubut, Argentina Revista Brasileira de Paleontologia 13(3):247-256
* L. M. Ibiricu, G. A. Casal, R. D. Martinez, M. C. Lamanna, M. Luna and L. Salgado. 2013. ''Katepensaurus goicoecheai'', gen. et sp. nov., a Late Cretaceous rebbachisaurid (Sauropoda, Diplodocoidea) from central Patagonia, Argentina. Journal of Vertebrate Paleontology 33(6):1351-1366
* L. M. Ibiricu, G. A. Casal, M. C. Lamanna, R. D. Martínez, J. D. Harris and K. J. Lacovara. 2012. The southernmost records of Rebbachisauridae (Sauropoda: Diplodocoidea), from early Late Cretaceous deposits in central Patagonia. Cretaceous Research 34:220-232
* R. D. Martínez, F. E. Novas, and A. Ambrosio. 2004. Abelisaurid remains (Theropoda, Ceratosauria) from southern Patagonia. Actas I del Congreso Ltinoamericano de Paleontología de Vertebrados. Ameghiniana 41(4):577-585
* R. D. Martínez and F. E. Novas. 1997. Un nuevo tetanuro (Dinosauria: Theropoda) de la Formación Bajo Barreal (Cretácico Superior), Patagonia new tetanuran (Dinosauria: Theropoda) from the Bajo Barreal Formation (Upper Cretaceous), Patagonia Ameghiniana 34(4):538
* R. D. Martínez, A. Maure, M. Oliva and M. Luna. 1993. Un maxilar de Theropoda (Abelisauria) de la Formación Bajo Barreal, Cretacico Tardio, Chubut, Argentina theropod (Abelisauria) maxilla from the Bajo Barreal Formation, Late Cretaceous, Chubut, Argentina Ameghiniana 30(1):109-110
* J. C. Sciutto and R. D. Martínez. 1994. Un nuevo yacimiento fosilífero de la Formación Bajo Barreal (Cretacico Tardio) y su fauna de saurópodos new fossiliferous locality in the Bajo Barreal Formation (Late Cretaceous) and its sauropod fauna Naturalia Patagonica, Ciencias de la Tierra 2:27-47
Geologic formations of Argentina
Cretaceous Argentina
Sandstone formations
Tuff formations
Fluvial deposits
Reservoir rock formations
Paleontology in Argentina
Geology of Chubut Province
Geology of Santa Cruz Province, Argentina
Golfo San Jorge Basin