Olca is a stratovolcano on the border of Chile and Bolivia. It lies in the middle of a 15 km long ridge composed of several stratovolcanos. Cerro Minchincha lies to the west and Paruma to the east. It is also close to the pre-Holocene Cerro Paruma. It is andesitic and dacitic in composition, with lava flows extending several kilometres north of the peak. The only activity from the ridge during historical times was a flank eruption from 1865 to 1867. The exact source of this eruption is unclear.

Cerro Aucanquilcha, Chile, 2016-02-10, DD 15.JPG
Highest point
Elevation5,407 m (17,740 ft)
Coordinates20°56′0″S 68°29′0″W / 20.93333°S 68.48333°W / -20.93333; -68.48333
LocationBolivia, Potosí Department, Nor Lípez Province, San Pedro de Quemes Municipality, Cana Canton
Chile, Antofagasta Region, El Loa Province
Parent rangeAndes
Mountain typeStratovolcano
Last eruption1867

See alsoEdit


  • "Olca-Paruma". Global Volcanism Program. Smithsonian Institution.

External linksEdit