Río Neuquén Subgroup

Río Neuquén Subgroup
Río Neuquén Subgroup
Stratigraphic range: Late Turonian-Late Coniacian; ~91–86 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Type	Subgroup
Unit of	Neuquén Group
Sub-units	Plottier, Sierra Barrosa, Los Bastos & Portezuelo Formations
Underlies	Río Colorado Subgroup
Overlies	Río Limay Subgroup
Thickness	Up to 155 m (509 ft)
Lithology
Primary	Sandstone
Other	Claystone, limestone, mudstone
Location
Coordinates	37°24′S 69°06′W / 37.4°S 69.1°W
Approximate paleocoordinates	42°12′S 49°24′W / 42.2°S 49.4°W
Region	Mendoza, Río Negro & Neuquén Provinces
Country	Argentina
Extent	Neuquén Basin
Type section
Named for	Neuquén River
	Río Neuquén Subgroup (Argentina)

The Río Neuquén Subgroup is a geological subgroup in the Neuquén Basin, Neuquén Province, Argentina, whose strata date back to the Late Cretaceous. The subgroup, formerly defined as a formation, is the middle unit of the Neuquén Group and contains the Plottier, Sierra Barrosa Formation,^[1] Los Bastos Formation,^[2] and Portezuelo Formations.^[3]^[4]^[5] The subgroup overlies the Río Limay Subgroup and is overlain by the Río Colorado Subgroup.^[6] Dinosaur remains are among the fossils that have been recovered from the formation.^[7]

Fossil content[edit]

Dinosaurs
Genus	Species	Location	Stratigraphic position	Material	Notes	Images
Antarctosaurus^[8]	A. giganteus^[8]			"[Two] femora, pubis."^[9]	Río Neuquén remains previously referred to A. giganteus are now attributed to an indeterminate sauropod.^[8]
Antarctosaurus^[8]	A. wichmannianus^[8]
Megaraptor^[8]	M. namunhuaiquii^[8]			"Partial forelimb, manus, and pes."^[10]
Patagonykus^[8]	P. puertai^[8]			"Partial postcranial skeleton."^[11]
Rinconsaurus^[8]	R. cadamirus^[8]
Titanosaurus^[8]	Indeterminate^[8]				Titanosaurus is now considered a nomen dubium.^{[citation needed]}
Unenlagia^[8]	U. comahuensis^[8]			"Fragmentary postcrania."^[12]

^ Garrido, 2011, p.237
^ Garrido, 2011, p.236
^ Balgord & Carapa, 2014, p.6
^ Balgord, 2017, p.455
^ Lebinson et al., 2018, p.252
^ Leanza et al., 2004, p.63
^ Weishampel, 2004, pp. 600-604
^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k ^l ^m ⁿ "Río Neuquén Formation." Weishampel, et al. (2004). Pg. 603.
^ "Table 13.1," in Weishampel, et al. (2004). Page 270.
^ "Table 10.1," in Weishampel, et al. (2004). Page 199.
^ "Table 11.1," in Weishampel, et al. (2004). Page 211.
^ "Table 10.1," in Weishampel, et al. (2004). Page 198.

Balgord, Elizabeth A (2017), "Triassic to Neogene evolution of the south-central Andean arc determined by detrital zircon U-Pb and Hf analysis of Neuquén Basin strata, central Argentina (34°S–40°S)", Lithosphere, 9 (3): 453–462, doi:10.1130/L546.1
Balgord, Elizabeth A.; Carapa, Barbara (2014), "Basin evolution of Upper Cretaceous–Lower Cenozoic strata in the Malargüe fold-and-thrust belt: northern Neuquen Basin, Argentina" (PDF), Basin Research: 1–24, retrieved 2019-02-22
Garrido, Alberto C (2011), El Grupo Neuquén (Cretácico Tardío) en la Cuenca Neuquina, XVIII Congreso Geológico Argentino, pp. 231–244, retrieved 2019-02-23
Leanza, H.A.; Apesteguia, S.; Novas, F.E.; De la Fuente, M.S. (2004), "Cretaceous terrestrial beds from the Neuquén Basin (Argentina) and their tetrapod assemblages", Cretaceous Research, 25: 61–87, Bibcode:2004CrRes..25...61L, doi:10.1016/j.cretres.2003.10.005, retrieved 2019-02-16
Lebinson, Fernando; Turienzo, Martín; Sánchez, Natalia; Araujo, Vanesa; D'Annunzio, María Celeste; Dimieri, Luis (2018), "The structure of the northern Agrio fold and thrust belt (37°30' S), Neuquén Basin, Argentina", Andean Geology, 45 (2): 249–273, doi:10.5027/andgeoV45n2-3049, hdl:11336/83841, retrieved 2019-02-22
Weishampel, David B.; Dodson, Peter; Osmólska, Halszka (2004), The Dinosauria, 2nd edition, Berkeley: University of California Press, pp. 1–880, ISBN 0-520-24209-2, retrieved 2019-02-21