Río Limay Subgroup

The Río Limay Subgroup is a geological unit of the Neuquén Group in the Neuquén Basin of Neuquén, Mendoza and Río Negro Provinces, northern Patagonia, Argentina. The strata date back to the Late Cretaceous (Early Cenomanian to Early Turonian. The Río Limay Subgroup overlies the Lohan Cura Formation, separated by an unconformity dated to 98 Ma.[1] Dinosaur remains are among the fossils that have been recovered from the formations it contains.[2]

Río Limay Subgroup Stratigraphic range: Early Cenomanian-Early Turonian ~98–91 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Type	Geological formation
Unit of	Neuquén Group
Sub-units	Candeleros, Huincul & Lisandro Formations
Underlies	Río Neuquén Subgroup
Overlies	Lohan Cura Formation
Thickness	Up to 625 m (2,051 ft)
Lithology
Primary	Sandstone
Other	Siltstone, claystone
Location
Coordinates	39.4°S 69.2°W / -39.4; -69.2
Approximate paleocoordinates	46.5°S 45.5°W / -46.5; -45.5
Region	Mendoza, Neuquén & Río Negro Provinces
Country	Argentina
Extent	Neuquén Basin
Type section
Named for	Limay River
Río Limay Subgroup (Argentina)

Having previously been considered a distinct formation, the Río Limay Subgroup is now considered a member of the larger Neuquén Group, and itself contains several specific geological formations (from youngest to oldest):

• Lisandro Formation (late Cenomanian to early Turonian)
• Huincul Formation (late Cenomanian)
• Candeleros Formation (early Cenomanian)