Río Neuquén Subgroup

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Coordinates: 37°24′S 69°06′W / 37.4°S 69.1°W / -37.4; -69.1
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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[edit]

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[edit]

References[edit]

  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[edit]

  • 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. 453–462. .
  • Balgord, Elizabeth A., and Barbara Carapa. 2014. Basin evolution of Upper Cretaceous–Lower Cenozoic strata in the Malargüe fold-and-thrust belt: northern Neuquen Basin, Argentina. Basin Research _. 1–24. Accessed 2019-02-22.
  • Garrido, Alberto C. 2011. El Grupo Neuquén (Cretácico Tardío) en la Cuenca Neuquina, 231–244. XVIII Congreso Geológico Argentino. Accessed 2019-02-23.
  • Leanza, H.A.; S. Apesteguia; F.E. Novas, and M.S. De la Fuente. 2004. Cretaceous terrestrial beds from the Neuquén Basin (Argentina) and their tetrapod assemblages. Cretaceous Research 25. 61-87. Accessed 2019-02-16.
  • Lebinson, Fernando; Martín Turienzo; Natalia Sánchez; Vanesa Araujo; María Celeste D'Annunzio, and Luis Dimieri. 2018. The structure of the northern Agrio fold and thrust belt (37°30’ S), Neuquén Basin, Argentina. Andean Geology 45. 249–273. Accessed 2019-02-22.
  • Weishampel, David B.; Peter Dodson, and Halszka (eds.) Osmólska. 2004. The Dinosauria, 2nd edition, 1–880. Berkeley: University of California Press. Accessed 2019-02-21.ISBN 0-520-24209-2
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