Plottier Formation
The Plottier Formation is a geologic formation that outcrops in the Argentine Patagonian provinces of Río Negro and Neuquén. It is the younger of two formations belonging to the Río Neuquén Subgroup within the Neuquén Group of the Neuquén Basin, with the oldest rocks dating from the late Coniacian and its youngest maybe from the very start of the Santonian. Formerly, that subgroup was treated as a formation, and the Plottier Formation was known as the Plottier Member.
| Plottier Formation | |
|---|---|
| Stratigraphic range: late Coniacian-early Santonian ~ | |
| Type | Geological formation |
| Unit of | Neuquén Group Río Neuquén Subgroup |
| Underlies | Río Colorado Subgroup Bajo de la Carpa Formation |
| Overlies | Sierra Barrosa Formation |
| Thickness | Up to 25 m (82 ft) |
| Lithology | |
| Primary | Claystone |
| Other | Sandstone |
| Location | |
| Coordinates | 37.4°S 69.1°W |
| Approximate paleocoordinates | 42.2°S 49.4°W |
| Region | Mendoza, Neuquén & Río Negro Provinces |
| Country | Argentina |
| Extent | Neuquén Basin |
| Type section | |
| Named for | Plottier |
| Named by | Fossa Mancini et al. |
| Year defined | 1938 |
Plottier Formation (Argentina) | |
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