Chonos Metamorphic Complex

Chonos Metamorphic Complex
Stratigraphic range: Jurassic
TypeComplex
Sub-unitsPotranca Formation
UnderliesTraiguén Formation
Lithology
PrimaryMetasediments including metaturbidite
Location
RegionAysén Region
Country Chile
Type section
Named forChonos Archipelago

The Chonos Metamorphic Complex is an accretionary complex composed of metamorphic rocks located in western Aysén Region, Chile. The deposition of the sedimentary protoliths occurred in the Triassic and they were later metamorphosed in the Jurassic. The formation has been subdivided into a highly deformed Western belt and an Eastern belt where sedimentary structures are preserved.[1]

Fossils of Late Triassic bivalve species Monotis (Pacimonotis) aff. subcircularis and Lima sp. has been found in Chonos Metamorphic Complex, the first one in the Potranca Formation.[1][2]

References

  1. ^ a b Hervé, Francisco; Fanning, C. Mark (2001). "Late Triassic detrital zircons in meta-turbidites of the Chonos Metamorphic Complex, southern Chile". Revista Geológica de Chile. 28 (1). doi:10.4067/S0716-02082001000100005. Retrieved 23 August 2016.
  2. ^ Fang, Zong-jie; Boucot, Arthur; Covacevich, Vladimir; Hervé, Francisco (1998). "Discovery of Late Triassic fossils in the Chonos Metamorphic Complex, Southern Chile". Revista Geológica de Chile. 25 (2). doi:10.4067/S0716-02081998000200004. Retrieved 23 August 2016.


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