Earth:Divisadero Group
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| 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 / 45.5°S 72°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) | |
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]
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
References
- ↑ 1.0 1.1 1.2 Suárez, Manuel; de la Cruz, Rita (1994). "Estratigrafía y paleogeografía mesozoica de Aisén nororiental (45-46 lat.s.), Chile" (in es). 7° Congreso Geológico Chileno. Concepción: Universidad de Concepción. pp. 538–542. http://biblioteca.sernageomin.cl/opac/DataFiles/7166pp538_542.pdf.
- ↑ 2.0 2.1 Haller, Miguel J.; Lapido, Omar R. (1980). "El Mesozoico de la Cordillera Patagónica Central" (in es). Revista de la Asociación Geológica Argentina XXXV (2): 230–247. https://books.google.com/books?id=HOFLElilZCYC&q=grupo+divisadero&pg=PA237. Retrieved January 4, 2018.
- ↑ Aptian-Albian subaerial volcanic rocks in central Patagonia: Divisadero and Chubut Groups
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