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Coihaique Group information


Coihaique Group
Stratigraphic range: Late Jurassic–Aptian
Toqui Formation with Chilesaurus fossils
TypeGeologic group
Unit ofAysén Basin
Sub-unitsApeleg Formation
Katterfeld Formation
Toqui Formation
UnderliesDivisadero Group
OverliesIbáñez Formation
Lithology
PrimaryShale, volcaniclastic rocks, sandstone
OtherTurbidite
Location
RegionAysén Region, Patagonia
CountryCoihaique Group Chile

The Coihaique Group is a group of geological formations in northwestern Patagonia. From top to bottom the formations that make the group are Apeleg, Katterfeld and Toqui. The contact between the formations of the group are diachronous with Katterfeld Formation interfingering with the formations on top and below it. The lower and upper boundaries of the group are unconformities formed by erosion. The older parts of Coihaique Group represent a marine transgression while the younger parts evidences a return to non-marine conditions.[1]

  1. ^ Suárez, Manuel; de la Cruz, Rita (1994). Estratigrafía y paleogeografía mesozoica de Aisén nororiental (45-46 lat.s.), Chile (PDF). 7° Congreso Geológico Chileno (in Spanish). Concepción: Universidad de Concepción. pp. 538–542. Archived from the original (PDF) on December 28, 2017.

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