| 词条 | Olca |
| 释义 |
| name = Olca | photo = Cerro Aucanquilcha, Chile, 2016-02-10, DD 15.JPG | photo_caption = | elevation_m = 5,407 | elevation_ref = | prominence = | location = Bolivia, Potosí Department, Nor Lípez Province, San Pedro de Quemes Municipality, Cana Canton Chile, Antofagasta Region, El Loa Province | range = Andes | coordinates = {{coord|20|56|0|S|68|29|0|W|type:mountain_region:CL}} | topo = | type = Stratovolcano | age = | last_eruption = 1867 | first_ascent = | easiest_route = }} 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. See also
Sources
External links
7 : Stratovolcanoes of Chile|Volcanoes of Antofagasta Region|Subduction volcanoes|Volcanoes of Potosí Department|Polygenetic volcanoes|Bolivia–Chile border|International mountains of South America |
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