Olca

Olca
Elevation 5,407 m (17,740 ft)
Location
Location  Bolivia Bolivia Potosí Department, Nor Lípez Province, San Pedro de Quemes Municipality, Cana Canton
 Chile Antofagasta Region, El Loa Province
Range Andes
Geology
Type Stratovolcano
Last eruption 1867

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.

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