Río Neuquén Subgroup

Río Neuquén Subgroup
Stratigraphic range: Late Turonian-Late Coniacian
~91–86 Ma
↓
TypeSubgroup
Unit ofNeuquén Group
Sub-unitsPlottier, Sierra Barrosa, Los Bastos & Portezuelo Formations
UnderliesRío Colorado Subgroup
OverliesRío Limay Subgroup
ThicknessUp to 155 m (509 ft)
Lithology
PrimarySandstone
OtherClaystone, limestone, mudstone
Location
Coordinates37°24′S 69°06′W / 37.4°S 69.1°W / -37.4; -69.1
Approximate paleocoordinates42°12′S 49°24′W / 42.2°S 49.4°W / -42.2; -49.4
RegionMendoza, Río Negro & Neuquén Provinces
Country Argentina
ExtentNeuquén Basin
Type section
Named forNeuquén River
Río Neuquén Subgroup is located in Argentina
Río Neuquén Subgroup
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

See also: Plottier Formation § Fossil content, and Portezuelo Formation § Fossil content
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]
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]

See also

References

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

Bibliography

  • 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