Malleco Formation Explained

Malleco Formation
Period:	Pliocene
Age:	Pliocene–Early Pleistocene
Prilithology:	Volcaniclastic rocks, lava
Namedfor:	Malleco River
Namedby:	Suárez & Emparan
Year Ts:	1997
Region:	Araucanía Region
Overlies:	Vizcacha-Cumilao Complex Cura-Mallín Formation Estratos de Huichahue Melipeuco Plutonic Group

Malleco Formation (Spanish; Castilian: Formación Malleco) is a geological formation of volcanic origin in the Andes of Araucanía Region (38–39° S), Chile. The formation is made up by volcaniclastic rocks, including tuffs, lahars and lavas of Pliocene–Early Pleistocene age.^[1] It is considered equivalent to the Cola de Zorro Formation found further north in Chile and the so-called "Asociación volcánica de la precordillera oriental" located around the upper courses Bío Bío and Aluminé rivers.^{[1] [2]}

Notes and References

1. Suárez, M. and Emparan, C. (1997). Hoja Curacautín, Carta geológica de Chile.
2. Lara . Luis . Rodríguez . Carolina . Moreno . Hugo . Pérez de Arce . Carlos . Geocronología K-Ar y geoquímica del volcanismo plioceno superior-pleistoceno de los Andes del sur (39-42°S) . K-Ar geochronology and geochemistry of the Upper Pliocene -Pleistocene volcanism of the southern Andes (39-42°S) . Spanish . Revista Geológica de Chile . July 2001 . 28 . 1 . 10.4067/S0716-02082001000100004 . free .