| 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 ageological formation of volcanic origin in the Andes ofAraucanía Region (38–39° S), Chile. The formation is made up byvolcaniclastic rocks, includingtuffs,lahars andlavas ofPliocene–Early Pleistocene age.[1] It is considered equivalent to theCola de Zorro Formation found further north in Chile and the so-called "Asociación volcánica de la precordillera oriental" located around the upper coursesBío Bío andAluminé rivers.[1][2]
