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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: dormant (1 out of 5)
Ollague volcano books
Typical eruption style: effusive & explosive
Ollague volcano eruptions: possible eruption in 1903
TimeMag. / DepthDistanceLocation
Sat, 21 Oct
Sat, 21 Oct 06:08 UTCM 2.6 / 129 km13 km28 km al NO de Ollagüe
Fri, 20 Oct
Fri, 20 Oct 03:51 UTCM 2.7 / 129.8 km31 km46 km al SO de Ollagüe
Thu, 19 Oct
Thu, 19 Oct 08:37 UTCM 3.0 / 142.2 km8 km17 km al SE de Ollagüe
Wed, 18 Oct
Wed, 18 Oct 04:05 UTCM 2.6 / 129.1 km27 km50 km al SO de Ollagüe
Sun, 15 Oct
Sun, 15 Oct 21:52 UTCM 2.6 / 134.4 km6 km27 km al O de Ollagüe
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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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