Olca
Sign in to saveOlca 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.
Key facts
- Mountain.name
- Olca
- Mountain.photo
- Cerro Aucanquilcha, Chile, 2016-02-10, DD 15.JPG
- Mountain.elevation_m
- 5,407
- Mountain.map
- Chile
- Mountain.range
- Andes
- Mountain.type
- Stratovolcano
- Mountain.last_eruption
- 1867
- Mountain.map_size
- 260px
- Mountain.subdivision1
- Bolivia, Nor Lípez Province, San Pedro de Quemes Municipality, Cana Canton Chile, Antofagasta Region, El Loa Province
- Mountain.subdivision1_type
- Location
via Wikipedia infobox
Article
6 sectionsContents
- Gas emissions and composition
- Eruptive history and latest activity
- See also
- References
- Sources
- External links
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.
== Gas emissions and composition == The gasses emission is comprised by a single warm spring at the base and a persistent fumarole field over at the crater's dome for at least 60 years. The fumarolic field is about 0.1 km2 and the emissions measured in situ at the crater show a highly mixed magmatic system between high temperature gasses and hydrothermal fluids.