Divisadero Group

The Divisadero Group is a group of geological formations in the Magallanes Basin (Chile) or Austral Basin (Argentina) of northwestern Patagonia. It overlies the Coihaique Group.^[1] The group is chiefly made up of pyroclastic rocks and lavas of the calc-alkaline magma series.^[1] Rocks are of andesite and rhyolite composition.^[2]

Divisadero Group
Stratigraphic range: Aptian–Albian
Type	Geologic group
Underlies	Cerro Plataforma, La Cascada, Ligorio Márques & Cardiel Formations
Overlies	Coihaique Group
Lithology
Primary	Pyroclastic rock, lava
Location
Location	Patagonia
Coordinates	45°30′S 72°00′W
Region	Chubut Province Aysén Region
Country	Argentina, Chile
Extent	Magallanes or Austral Basin
Type section
Named by	Heim
Year defined	1940
Divisadero Group (Argentina)

Geographic extent

In Chile, the formation crops out in Aysén Region^[1] while in Argentina it can be found in Chubut Province.^[2]

Tectonic movements during the Miocene have significantly deformed Divisadero Group.^[3]

See also

• Geology of Aysén Region
• Cretaceous South America