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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
Mon, 15 Oct
Mon, 15 Oct 10:42 UTCM 3.3 / 124.5 km32 km50 km al SO de Ollagüe
Fri, 12 Oct
Fri, 12 Oct 21:21 UTCM 2.9 / 133.4 km14 km26 km al SE de Mina Collahuasi
Fri, 12 Oct 03:36 UTCM 3.2 / 113.3 km17 km27 km al SO de Ollagüe
Wed, 10 Oct
Wed, 10 Oct 08:44 UTCM 3.0 / 122.6 km28 km40 km al SO de Ollagüe
Mon, 1 Oct
Mon, 1 Oct 05:56 UTCM 3.4 / 126 km34 kmANTOFAGASTA, CHILE
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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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