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Ollague volcano

stratovolcano 5868 m / 19,252 ft
Northern Chile, Bolivia and Argentina, South America, -21.3°S / -68.18°W
Current status: normal or dormant (1 out of 5) | Reports
Ollague volcano books
Typical eruption style: effusive & explosive
Ollague volcano eruptions: possible eruption in 1903
TimeMag. / DepthDistanceLocation
Thu, 9 Jan 2020
Thu, 9 Jan 02:26 UTCM 2.8 / 145.4 km11 km5 km al SO de Ollagüe (Chile)
Thu, 19 Dec 2019
Thu, 19 Dec 19:18 UTCM 2.7 / 5 km8 km10 km al S de Ollagüe (Chile)
Volcán Ollagüe (also known as Oyahué) is a massive andesitic stratovolcano in northern Chile on the border with Bolivia. It contains a dacitic summit lava dome. No historical eruptions have been confirmed from Ollagüe, but there is intense fumarolic activity and a persistent steam plume emanates from a fumarole on the south side of the summit dome.
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.

Background:

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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