5-665: 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. Dinosaur remains are among the fossils that have been recovered from
10-691: Is a group of geologic formations found in Argentina . Rocks in the Neuquén Group fall within the Cenomanian to early Campanian stages of the Late Cretaceous Period. It overlies the older Lohan Cura Formation and is itself overlain by the younger Allen Formation of the Malargüe Group , separated from both by unconformities , dated to 98 and 79 Ma respectively. Deposits have been located in
15-414: The provinces of Río Negro , Neuquén , and Mendoza . Although several different types of environments are represented in various sections of the Neuquén Group, the dominant regime is alluvial deposition. Many dinosaur and other fossil types have been discovered in these sediments. There are seven formations within the Neuquén Group. These are divided into three subgroups named after major rivers in
20-539: The area. In some works, the subgroups themselves are treated as formations and what usually is considered to be the formations as mere members of these. However, particularly in the Río Limay Subgroup, the formations are clearly composed of very distinct rock layers. Neuquén Group strata, ordered from youngest to oldest South of Añelo , on the road between Lake Los Barreales and the Neuquén River are views on
25-404: The formations it contains. 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): Neuqu%C3%A9n Group [REDACTED] Río Neuquén Subgroup Plottier Formation Portezuelo Formation The Neuquén Group
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