The Río Neuquén Subgroup is a geological

subgroup In group theory, a branch of mathematics, a subset of a group G is a subgroup of G if the members of that subset form a group with respect to the group operation in G. Formally, given a group (mathematics), group under a binary operation ...

in the

Neuquén Basin Neuquén Basin () 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 basin bounds to the wes ...

Neuquén Province Neuquén () is a Provinces of Argentina, province of Argentina, located in the west of the country, at the northern end of Patagonia. It borders Mendoza Province to the north, Rio Negro Province to the southeast, and Chile to the west. It also me ...

, Argentina, whose strata date back to the

Late Cretaceous The Late Cretaceous (100.5–66 Ma) is the more recent of two epochs into which the Cretaceous Period is divided in the geologic time scale. Rock strata from this epoch form the Upper Cretaceous Series. The Cretaceous is named after ''cre ...

. The subgroup, formerly defined as a formation, is the middle unit of the Neuquén Group and contains the

Plottier Plottier is a city located in the Confluencia Department, in Neuquén Province, Argentina. The population is 40.000 inhabitants. It is about 15 km from Neuquén City, which turns this city into an important place for the population. Plottier ...

Sierra Barrosa Formation The Sierra Barrosa Formation is a geologic formation of the Neuquén Basin in the northern Patagonian provinces of Mendoza Province, Mendoza and Neuquén Province, Neuquén. The formation dates to the Late Cretaceous, Coniacian, middle to late Con ...

,Garrido, 2011, p.237 Los Bastos Formation,Garrido, 2011, p.236 and Portezuelo Formations.Balgord & Carapa, 2014, p.6Balgord, 2017, p.455Lebinson et al., 2018, p.252 The subgroup overlies the Río Limay Subgroup and is overlain by the Río Colorado Subgroup.Leanza et al., 2004, p.63 Dinosaur remains are among the fossils that have been recovered from the formation.Weishampel, 2004, pp. 600-604

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* * * * * * {{DEFAULTSORT:Rio Neuquen Subgroup Geologic formations of Argentina Neuquén Group Upper Cretaceous Series of South America Cretaceous Argentina Coniacian Stage Turonian Stage Cenomanian Stage Shale groups Sandstone groups Fluvial deposits Fossiliferous stratigraphic units of South America Paleontology in Argentina Geology of Mendoza Province Geology of Neuquén Province Geology of Río Negro Province Neuquen

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