Quetrupillán Volcano

Quetrupillán
Quetrupillán with Lanín in the background
Highest point
Elevation	2,360 m (7,740 ft)
Coordinates	39°30′S 71°42′W / 39.5°S 71.7°W / -39.5; -71.7
Geography
Location	Chile
Parent range	Andes
Geology
Age of rock	-Holocene
Mountain type	Stratovolcano
Volcanic arc/belt	South Volcanic Zone
Last eruption	June 1872
Climbing
Easiest route	Palguín - Laguna Azul

Quetrupillán is a stratovolcano located in the La Araucanía Region of Chile. It is situated between Villarrica and Lanín volcanoes, within Villarrica National Park. Geologically, Quetrupillán is located in a tectonic basement block between the main traces of Liquiñe-Ofqui Fault (to the west) and Reigolil-Pirihueico Fault (to the east).

The volcano consists of one stratovolcano with a summit caldera, and is constructed within a field of smaller centres and a larger caldera. It was active during the late ; some large eruptions occurred during the Holocene as well.

Quetrupillán lies on the border between the Los Rios Region and the La Araucanía Region, in the Southern Volcanic Zone. Together with Villarica and Lanín it forms a northwest-southeast alignment of volcanoes, which may be a transcurrent fault. The Cordillera El Mocho and Quinquilil volcanoes are likewise situated on this alignment, both are deeply eroded composite volcanoes of small dimensions. Other volcanoes in the Southern Volcanic Zone have similar alignments, such as Nevados de Chillán and Puyehue-Cordon Caulle. In comparison to Villarica, Quetrupillán has been less active and its eruptions were also smaller than Villarica's, with no large pyroclastic flows found at Quetrupillán.