Ollague Volcán Ollagüe, also known as  Oyahué, is a massive andesitic  stratovolcano with a summit  dacitic lava dome. A large  Pleistocene debris-avalanche  deposit extending westward  from the Ollagüe volcano  separates the Salar de San  Martín from the Salar de  Ollagüe. Three youthful-looking  silicic lava flows mark late post-  collapse eruptions, but show  evidence of glaciation and are  thought to pre-date the last glacial advance at about 11,000 years ago. A  youthful-looking scoria cone on the lower WSW flank, La Poruñita, was initially  considered to be of Holocene age.however Wörner et al. Active sulfur mines  on the upper western and southern flanks of Ollagüe are reached by a road  that climbs to about 5500 m elevation. No historical eruptions have been  recorded from Ollagüe; activity has been restricted to periods of intense  fumarolic activity, and a persistent steam plume emanates from a fumarole on  the south side of the summit dome.  (Global Volcanic Program)  Summit Elevation: 5868 m Latitude:                21.30°S Longitude:             68.18°W click on pictures to enlarge HOME Panoramas click on panoramas