Earth:Malleco Formation
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| Malleco Formation Stratigraphic range: Pliocene–Early Pleistocene | |
|---|---|
| Underlies | Quaternary Andean volcanoes |
| Overlies | Vizcacha-Cumilao Complex Cura-Mallín Formation Estratos de Huichahue Melipeuco Plutonic Group |
| Lithology | |
| Primary | Volcaniclastic rocks, lava |
| Location | |
| Region | Araucanía Region |
| Country |  Chile |
| Type section | |
| Named for | Malleco River |
| Named by | Suárez & Emparan |
| Year defined | 1997 |
Malleco Formation (Spanish: 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]
References
- ↑ 1.0 1.1 Suárez, M. and Emparan, C. (1997). Hoja Curacautín, Carta geológica de Chile.[page needed]
- ↑ Lara, Luis; Rodríguez, Carolina; Moreno, Hugo; Pérez de Arce, Carlos (July 2001). "Geocronología K-Ar y geoquímica del volcanismo plioceno superior-pleistoceno de los Andes del sur (39-42°S)" (in Spanish). Revista Geológica de Chile 28 (1). doi:10.4067/S0716-02082001000100004.
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