Río Neuquén Subgroup - Misplaced Pages

(Redirected from Rio Neuquen Formation) Geological subgroup in Argentina

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 / -37.4; -69.1
Approximate paleocoordinates	42°12′S 49°24′W / 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
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, Los Bastos Formation, and Portezuelo Formations. The subgroup overlies the Río Limay Subgroup and is overlain by the Río Colorado Subgroup. Dinosaur remains are among the fossils that have been recovered from the formation.

Fossil content

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

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