Ollagüe

From Wikipedia, the free encyclopedia
Jump to: navigation, search
For the commune in Chile, see Ollagüe, Chile.
Ollagüe
Ollague Volcano from Chile.jpg
Volcán Ollagüe viewed from the west.
Elevation 5,868 m (19,252 ft)
Prominence 1,686 m (5,531 ft)
Listing Ultra
Location
Ollagüe is located in Bolivia
Ollagüe
Ollagüe
Location in Bolivia, on the border with Chile
Location Potosí Department, Nor Lípez Province, Pelcoya Canton, Bolivia -
Antofagasta Region, El Loa Province, Chile
Range Andes
Coordinates 21°18′08″S 68°10′45″W / 21.30222°S 68.17917°W / -21.30222; -68.17917Coordinates: 21°18′08″S 68°10′45″W / 21.30222°S 68.17917°W / -21.30222; -68.17917
Geology
Type Stratovolcano
Last eruption Unknown

Ollagüe is a massive andesite stratovolcano [1] in the Andes Mountains, on the border between Bolivia and northern Chile. It is located southeast of the village that shares its name. It has a prominence of 1,686 metres (5,531 ft; 1.048 mi), towering over a mile above the surrounding terrain.

On the lower west flank of Ollagüe, debris avalanche hummocks surround La Poruñita scoria cone and separate Salar de Ollagüe from Salar de Carcote.

The volcano displays fumarolic activity, particularly to the south of its summit area.

On the northwest side of the mountain a disused switchback road, whose highest point reaches over 5,650m[2] leads to sulfur mines on the upper portion of Ollagüe. It is one of the highest (if not the highest) roads in the world. It has been descended by mountain bike.[3]

Volcán Ollagüe from the east, the Bolivian side

Background: Ollague Volcano suffered flank collapse during the Pleistocene and produced a large debris-avalanche deposit which extends westward and separates the Salar de San Martín from the Salar de Ollagüe salt flats. 3 youthful-looking silicic lava flows were emplyed after the collapse, but are probably still older than the last glaciation about 11,000 years ago. A youthful-looking scoria cone on the lower WSW flank, La Poruñita, was long believed to be relatively young, but has been dated to an age of 420,000 to 680,000 years.

See also[edit]

References[edit]

  1. ^ "Ollagüe". Global Volcanism Program, Smithsonian Institution. http://www.volcano.si.edu/world/volcano.cfm?vnum=1505-06%3D.
  2. ^ Chilean IGM 1:50,000 map, sheet 2115-6800, pub. Santiago 1985.
  3. ^ [1]| Andes website - Ollague information

External links[edit]