From Surf Wiki (app.surf) — the open knowledge base

Bajo Barreal Formation

Geological formations

Summary

Geological formations

Field	Value
name	Bajo Barreal Formation
type	Geological formation
age	Mid Cenomanian-Late Turonian
~
period	Turonian
prilithology	Sandstone
otherlithology	Claystone, mudstone, conglomerate, tuff
namedby	Teruggi & Rossetto
year_ts	1963
region	Chubut, Santa Cruz
country	Argentina
coordinates
paleocoordinates
unitof	Chubut Group
underlies	Lago Colhué Huapí Formation
overlies	Castillo Formation
extent	Golfo San Jorge Basin
map	{{Location map+	Argentina
relief	1
width	250
float	center
lat_deg	-45.3
lon_deg	-69.6
mark	Lightgreen pog.svg
marksize	12

~ The Bajo Barreal Formation is a geological formation in the Golfo San Jorge Basin 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. The sandstones, claystones, mudstones, conglomerates and tuff were deposited in a fluvial environment. 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 and Comodoro Rivadavia Formations. The Bajo Barreal Formation is a reservoir rock in the Golfo San Jorge Basin.

Vertebrate paleofauna

Dinosaurs

Indeterminate abelisauroids and titanosaurs have been recovered from the formation.

Ornithopods

Ornithopods reported from the Bajo Barreal Formation	Genus	Species	Stratigraphic position	Material	Notes	Images
Notohypsilophodon	N. comodorensis	Lower	"Vertebrae, partial fore- and hindlimb"	An elasmarian ornithopod.	[[File: Notohypsilodon reconstruction raingerr.png	center	100px]]

Sauropods

Sauropods reported from the Bajo Barreal Formation	Genus	Species	Stratigraphic position	Material	Notes	Images
Andesaurus	A. sp.	Lower		The most basal member of Titanosauria	[[File:Andesaurus LM.png	frameless]]
Campylodoniscus	C. ameghinoi	Lower	Maxilla with seven teeth.		[[File:Campylodoniscus ameghinoi Skull Mk I Me.jpg	center	100px]]
Drusilasaura	D. deseadensis	Upper	"four dorsal vertebrae, one sacral vertebra, six caudal vertebrae, left scapula, dorsal rib fragments, two haemapophyses and indeterminate fragments"	A titanosaur belonging to Lognkosauria	[[File:Drusilasaura.png	center	100px]]
Epachthosaurus	E. sciuttoi	Lower	"Vertebrae [and] partial illium."		[[File:Museo Egidio Feruglio Epachthosaurus.jpg	thumb]]
Katepensaurus	K. goicoecheai	Lower	Partial skeleton	A rebbachisaurid	[[File:Katepensaurus cervical vertebrae.jpg	frameless]]
Rebbachisauridae	Indeterminate	Lower	Dorsal vertebra	Different from Katepensaurus.
Sarmientosaurus	S. musacchioi	Lower	A skull	A lithostrotian titanosaur with a skull similar to Brachiosaurus	[[File:Cranium of Sarmientosaurus.PNG	center	100px]]

Theropods

Theropods reported from the Bajo Barreal Formation	Genus	Species	Stratigraphic position	Material	Notes	Images
Abelisauridae	Indeterminate	Lower	UNPSJB-PV247 A nearly complete left maxilla	Possibly distinct from Xenotarsosaurus. Estimated to be 6.21 m long, larger than Xenotarsosaurus.
Abelisauridae		Lower	partial skeleton	Different from all other comparable abelisaurids, but can't be compared with Xenotarsosaurus.
Aniksosaurus	A. darwini	Lower		A basal coelurosaur	[[File:Aniksosaurus.png	center	100px]]
Megaraptoridae	Indeterminate		Two partial skeletons
Xenotarsosaurus	X. bonapartei	Lower	A vertebra and a nearly complete hind limb	An abelisaur.	[[File:Xenotarsosaurus lower leg.jpg	center	100px]]

;Other fossils Other fossils found in the formation include:

Bonapartemys bajobarrealis
Prochelidella argentinae
Anura indet.
Chelonia indet.
Crocodylia indet.
Pterosauria indet.

References

Bibliography

References

Casal et al., 2016, p.55
[https://paleobiodb.org/classic/displayStrata?geological_group=&formation=Bajo%20Barreal&group_formation_member=Bajo%20Barreal Bajo Barreal Formation] at [[Fossilworks]].org
Sywan, 2001, p.131
"Table 18.1," in Weishampel, et al. (2004). Page 395.
Haubold, H. & Kuhn, O., 1961, Lebensbilder und Evolution fossiler Saurier, Amphibien und Reptilien, Wittenberg : Ziemsen
Huene, F. von, 1929, "Los Saurisquios y Ornitisquios del Cretaceo Argentino", Anales del Museo de La Plata, 3(2): 82-83
César Navarrete, Gabriel Casal and Rubén Martínez (2011). "Drusilasaura deseadensis gen. et sp. nov., a new titanosaur (Dinosauria-Sauropoda), of the Bajo Barreal Formation, Upper Cretaceous of north of Santa Cruz, Argentina". Revista Brasileira de Paleontologia 14 (1): 1-14. {{doi. 10.4072/rbp.2011.1.01.
"Table 13.1," in Weishampel, et al. (2004). Page 268.
(2020). "New materials and an overview of Cretaceous vertebrates from the Chubut Group of the Golfo San Jorge Basin, central Patagonia, Argentina". Journal of South American Earth Sciences.
Martínez et al., 2016
(2017-01-01). "Allometry and body length of abelisauroid theropods: Pycnonemosaurus nevesi is the new king". Cretaceous Research.
Lamanna, Matthew C.. (2012). "A new abelisaurid (Theropoda: Ceratosauria) skeleton from the Upper Cretaceous Bajo Barreal Formation of Chubut Province, Argentina.". Journal of Vertebrate Paleontology.
"63.2 Provincia de Chubut, Argentina; 2. Bajo Barreal Formation," in Weishampel, et al. (2004). Page 602.
(2020-11-30). "Megaraptorid (Theropoda: Tetanurae) Partial Skeletons from the Upper Cretaceous Bajo Barreal Formation of Central Patagonia, Argentina: Implications for the Evolution of Large Body Size in Gondwanan MegaraptoranS". Annals of Carnegie Museum.
"Table 3.1," in Weishampel, et al. (2004). Page 49.
Casal, 2016, p.58
[https://paleobiodb.org/classic/displayCollResults?collection_no=152253 Estancia Laguna Palacios "2005 Quarry"] at [[Fossilworks]].org
[https://paleobiodb.org/classic/displayCollResults?collection_no=38952 6 km north of Estancia "Ocho Hermanos"] at [[Fossilworks]].org

Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

bajo-barreal-formation geologic-formations-of-argentina cretaceous-argentina sandstone-formations tuff-formations-of-argentina fluvial-deposits reservoir-rock-formations paleontology-in-argentina geology-of-chubut-province geology-of-santa-cruz-province,-argentina golfo-san-jorge-basin conglomerate-formations-of-argentina claystone-formations mudstone-formations-of-argentina

Want to explore this topic further?

Ask Mako anything about Bajo Barreal Formation — get instant answers, deeper analysis, and related topics.

Research with Mako

Free with your Surf account

Content sourced from Wikipedia, available under CC BY-SA 4.0.

This content may have been generated or modified by AI. CloudSurf Software LLC is not responsible for the accuracy, completeness, or reliability of AI-generated content. Always verify important information from primary sources.

Report