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The late-Pleistocene to Holocene Quetrupillan stratovolcano is at the center of a group of three volcanoes trending transverse to the Andean chain. Constructed within a large 7 x 10 km wide caldera, 2360-m-high, glacier-covered Quetrupillan contains a 3.5-km-wide caldera and has more silicic lavas than its more prominent neighbors Villarrica and Lanín. The basaltic scoria cone Huililco lies 12 km NE of Quetrupillan, a rhyolitic lava dome lies on the south flank of the caldera, and the Volcanes de Reyehueico produced basaltic-andesite lava flows 15 km south of the summit caldera. Some of the most recent activity produced the Volcanes de Llancahue pyroclastic cones near the SW margin of the older caldera. Petit-Breuilh (1994 pers. comm.) reported a single historical eruption from Quetrupillan in 1872.
Summary of Holocene eruption dates and Volcanic Explosivity Indices (VEI).
|Start Date||Stop Date||Eruption Certainty||VEI||Evidence||Activity Area or Unit|
|1872 Jun 6||Unknown||Confirmed||2||Historical Observations|
This compilation of synonyms and subsidiary features may not be comprehensive. Features are organized into four major categories: Cones, Craters, Domes, and Thermal Features. Synonyms of features appear indented below the primary name. In some cases additional feature type, elevation, or location details are provided.
|Feature Name||Feature Type||Elevation||Latitude||Longitude|
|Huililco||Pyroclastic cone||1450 m||39° 26' 0" S||71° 36' 0" W|
|Llancahue, Volcanes de||Pyroclastic cone||39° 30' 0" S||71° 45' 0" W|
|Mocho, Cordillera el||Stratovolcano||39° 18' 0" S||71° 48' 0" W|
|Quinquilil||Stratovolcano||39° 30' 0" S||71° 35' 0" W|
|Reyeheico, Volcanes de||Pyroclastic cone|
|Quetrupillan stratovolcano is seen in this NASA International Space Station image with north to the upper right. The volcano was constructed within a large 7 x 10 km wide caldera. The 2360-m-high Quetrupillan volcano has produced more silicic lavas than its more prominent neighbors Villarrica and Lanín. Clusters of monogenetic vents, including lava domes and pyroclastic cones, are found on the southern side of the volcano.
NASA Space Station image ISS006-E-40424, 2003 (http://eol.jsc.nasa.gov/).
|Quetrupillan stratovolcano (left) lies at the center of a group of three volcanoes trending transverse to the Andean chain. It is seen here from the summit of Villarrica volcano (at the western end of the chain), with conical Lanín volcano at the eastern end in the background. The 2360-m-high Quetrupillan volcano was constructed within a large 7 x 10 km wide caldera; a smaller caldera truncates the summit. Some of the most recent activity produced pyroclastic cones along the right-hand flank, near the SW margin of the older caldera.
Photo by Judy Harden, 2004 (University of South Florida).
The following references have all been used during the compilation of data for this volcano, it is not a comprehensive bibliography. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title.
Gonzalez-Ferran O, 1972. Distribucion del volcanismo activo de Chile y la reciente erupcion del Volcan Villarrica. Instituto Geog Militar Chile, O/T 3491.
Gonzalez-Ferran O, 1995. Volcanes de Chile. Santiago: Instituto Geografico Militar, 635 p.
Hickey-Vargas R, Moreno H, Lopez-Escobar L, Frey F A, 1989. Geochemical variations in Andean basaltic and silicic lavas from the Villarrica-Lanin volcanic chain (39.5° S): an evaluation of source heterogeneity, fractional crystallization and crustal assimilation. Contr Mineral Petr, 103: 361-386.
Lara L E, Clavero J (eds), 2004. Villarrica volcano (39.5° S), Southern Andes, Chile. Servicio Geol Nac Argentina Bol, 61: 1-66.
Moreno H, 1974. Airplane flight over active volcanoes of central-south Chile. Internatl Symp Volc Andean & Antarctic Volc Problems Guidebook, Excur D-3, 56 p.
Moreno H, Naranjo J A, 1991. The southern Andes volcanoes (33°-41° 30' S), Chile. 6th Geol Cong Chile, Excur PC-3, 26 p.
Petit-Breuihl M E, 1994. . (pers. comm.).
Pichler H, Zeil W, 1971. The Cenozoic rhyolite-andesite association of the Chilean Andes. Bull Volc, 35: 424-452.