Ancud Volcanic Complex

Ancud Volcanic Complex
Stratigraphic range: Oligocene–Miocene
Type	Geological complex
Sub-units	Heuihuen, Teguaco, Cocotue
Underlies	Quaternary and Neogene deposits including Lacui Formation
Overlies	Caleta Chonos Formation
Lithology
Primary	Basaltic andesite
Other	Dacite
Location
Coordinates	41.9°S 73.8°W / -41.9; -73.8
Region	Los Lagos Region
Country	Chile
Extent	Chiloé Archipelago
Type section
Named for	Ancud
Ancud Volcanic Complex (Chile)

Ancud Volcanic Complex (Spanish: Complejo Volcánico de Ancud) is a volcanic complex of Oligocene and Miocene age located around Ancud with exposures in Chiloé Island, the Chilean mainland and smaller islets. Three subunits are recognized in the complex: Hueihuen, Teguaco and Cocotue.[1] The complex is part of the mid-Tertiary coastal magmatic belt in south-central Chile.[2]

See also

• Parga Formation
• Santo Domingo Formation

References

1. Valenzuela Ayala, Eduardo (1982). "Estratigrafía de la Boca Occidental del Canal de Chacao, X Región, Chile". Congreso Geológico Chileno (in Spanish). Vol. 3, Actas. pp. A343–A376.
2. Muñoz, Jorge; Troncoso, Rosa; Duhart, Paul; Crignola, Pedro; Lang, Farmer; Stern, Charles R. (2000), "The relation of the mid-Tertiary coastal magmatic belt in south-central Chile to the late Oligocene increase in plate convergence rate", Andean Geology, 27 (2): 341–492