Chonos Metamorphic Complex

Chonos Metamorphic Complex
Stratigraphic range: Jurassic
Type	Complex
Sub-units	Potranca Formation
Underlies	Traiguén Formation
Lithology
Primary	Metasediments including metaturbidite
Location
Region	Aysén Region
Country	Chile
Type section
Named for	Chonos 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

^ ^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.
^ 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.

Geology of Chile

Terranes

Sedimentary
formations
and groups

Cretaceous	Baños del Flaco Fm. Cerro Colorado Fm. Chacarilla Fm. Chañarcillo Gp. Coihaique Gp. Divisadero Gp. Dorotea Fm. Hornitos Fm. La Liga Fm. Ñirehuao Fm. Punta del Cobre Fm. Purilactis Gp. Quiriquina Fm. Viñita Fm. Way Gp. Zapata Fm.
Jurassic	Chacarilla Fm. Coihaique Gp. Ibáñez Fm. La Liga Fm. La Negra Fm. Nacientes del Biobío Fm. Nacientes del Teno Fm. Pan de Azúcar Fm. Tobífera Fm.
Triassic	Canto del Agua Fm. Choiyoi Gp. Panguipulli Fm. Santa Juana Fm. Tralcán Fm.