Malargüe Group
| Malargüe Group | |
|---|---|
| Stratigraphic range: Early Maastrichtian-Deseadan ~ | |
Outcrop of the Allen Formation at Auca Mahuida | |
| Type | Group |
| Sub-units | Agua de la Piedra Formation Roca & Jagüel Formations Loncoche & Allen Formations |
| Overlies | Neuquén Group Río Colorado Subgroup Anacleto Formation |
| Lithology | |
| Primary | Mudstone, sandstone, conglomerate |
| Other | Limestone, tuff, paleosol |
| Location | |
| Coordinates | 40°00′S 66°36′W / 40.0°S 66.6°W |
| Approximate paleocoordinates | 42°48′S 52°12′W / 42.8°S 52.2°W |
| Region | La Pampa, Río Negro, Neuquén & Mendoza Provinces |
| Country | Argentina |
| Extent | Neuquén Basin |
| Type section | |
| Named for | Malargüe |
The Malargüe Group is a group of geologic formations of the Neuquén Basin of the Mendoza, Neuquén, Río Negro and La Pampa Provinces in northern Patagonia, Argentina. The formations of the Malargüe Group range in age between the middle Campanian to Deseadan, an Oligocene age of the SALMA classification, straddling the Cretaceous–Paleogene boundary, about 79 million to 30 million years in age. The group overlies the older Neuquén Group, separated by an unconformity dated to 79 Ma. The rocks of the Malargüe Group comprise both marine and continental deposits which are over 400 m (1312 ft) thick in total.