Descabezado Grande (Chile)

Status Normal Eruption 1933 3953m
Stratovolcano(es) (Subduction zone / Continental crust (> 25 km))

Descabezado Grande

Volcán Descabezado Grande is a late-Pleistocene to Holocene andesitic-to-rhyodacitic stratovolcano with a 1.4-km-wide ice-filled summit crater. Along with Cerro Azul, only 7 km to the S, Descabezado Grande lies at the center of a 20 x 30 km volcanic field. A lateral crater, which formed on the upper NNE flank in 1932 shortly after the end of the major 1932 eruption from nearby Quizapu volcano on the N flank of Cerro Azul, was the site of the only historical eruption. The Holocene Alto de las Mulas fissure on the lower NW flank produced young rhyodacitic lava flows. Numerous small late-Pleistocene to Holocene volcanic centers are located N of the volcano. The northernmost of these, Lengua de Vulcano (or Mondaca), produced a very youthful rhyodacitic lava flow that dammed the Río Lentué.

Volcán Descabezado Grande, seen here from the west, is a late-Pleistocene to Holocene stratovolcano with a 1.4-km-wide ice-filled summit crater. The Holocene Alto de las Mulas fissure on the lower NW flank (out of view to the left) produced young rhyodacitic lava flows. A lateral crater formed on the upper NNE flank in 1932, shortly after the end of the major 1932 eruption from nearby Quizapú volcano. This was the site of the only historical eruption of Descabezado Grande.

Photo by Hugo Moreno (University of Chile).

Last updated 2019-08-24 10:00:03

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