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Ollague volcanstratovolcan 5868 m / 19,252 ft
Chile / Argentine (nord) + Bolivie, South America, -21.3°S / -68.18°W Condition actuelle: en sommeil (1 sur 5)
Style éruptif tipique: effusive & explosive
Eruptions du volcan Ollague: possible eruption in 1903 Derniers séismes proches:
There are active sulphur mines on the upper western and southern flanks of the volcano which are serviced by a now disused switchback road which reaches 5650 m elevation and rank as one of the highest in the world. Introduction:Ollague Volcano suffered flank collapse during the Pleistocene and produced a large debris-avalanche deposit which extends westward and separates the Salar de San Martín from the Salar de Ollagüe salt flats.3 youthful-looking silicic lava flows were emplyed after the collapse, but are probably still older than the last glaciation about 11,000 years ago. A youthful-looking scoria cone on the lower WSW flank, La Poruñita, was long believed to be relatively young, but has been dated to an age of 420,000 to 680,000 years. (Source: Smithsonian Global Volcanism Program) |
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