Río Neuquén Subgroup
Geological subgroup in Argentina / From Wikipedia, the free encyclopedia
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]
Quick Facts Type, Unit of ...
Río Neuquén Subgroup | |
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Stratigraphic range: Late Turonian-Late Coniacian ~91–86 Ma | |
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 | 37.4°S 69.1°W / -37.4; -69.1 |
Approximate paleocoordinates | 42.2°S 49.4°W / -42.2; -49.4 |
Region | Mendoza, Río Negro & Neuquén Provinces |
Country | Argentina |
Extent | Neuquén Basin |
Type section | |
Named for | Neuquén River |
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