Plottier Formation

Plottier Formation
Stratigraphic range: late Coniacian-early Santonian ~86–85 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
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°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, 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)

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.^[1]