Divisadero Group Explained

Divisadero Group
Type:Geologic group
Period:Albian
Age:AptianAlbian
Namedby:Heim
Year Ts:1940
Location:Patagonia
Region:Chubut Province
Aysén Region
Country:Argentina
Chile
Coordinates:-45.5°N -72°W
Underlies:Cerro Plataforma, La Cascada, Ligorio Márques & Cardiel Formations
Extent:Magallanes or Austral Basin

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.

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]

Notes and References

  1. Estratigrafía y paleogeografía mesozoica de Aisén nororiental (45-46 lat.s.), Chile. https://web.archive.org/web/20171228000452/http://biblioteca.sernageomin.cl/opac/DataFiles/7166pp538_542.pdf . dead . December 28, 2017 . Suárez. Manuel . de la Cruz . Rita . 1994 . . 538–542 . . 7° Congreso Geológico Chileno . es .
  2. Haller . Miguel J. . Lapido . Omar R. . 1980 . El Mesozoico de la Cordillera Patagónica Central . Revista de la Asociación Geológica Argentina. es . XXXV . 2 . 230–247 . January 4, 2018.
  3. https://web.archive.org/web/20180206073518/http://biblioserver.sernageomin.cl/opac/DataFiles/12993_v2_S7_033.pdf Aptian-Albian subaerial volcanic rocks in central Patagonia: Divisadero and Chubut Groups