Cay (volcano)

Last updated
Lago Yulton.jpg
Cay volcano as viewed from the shoreline of Yulton Lake.
Highest point
Elevation 2,090 m (6,860 ft) [1]
Coordinates 45°03′45″S72°59′09″W / 45.06250°S 72.98583°W / -45.06250; -72.98583 Coordinates: 45°03′45″S72°59′09″W / 45.06250°S 72.98583°W / -45.06250; -72.98583
Locationnorth of Aisén Fjord, and west of Yulton Lake, Aysén del General Carlos Ibáñez del Campo Region, Chile
Parent range Andes
Mountain type Stratovolcano
Volcanic arc/belt South Volcanic Zone
Last eruption Unknown

Cay is a stratovolcano in the South Volcanic Zone of the Andes in Aysén del General Carlos Ibáñez del Campo Region, Chile. The volcano is located 15 km northeast of the larger Maca Volcano and about 230 km of the Chile Trench at the intersection of NW-SE and NE-SW faults of the Liquiñe-Ofqui Fault Zone. [2] The volcano is composed from basalt and dacite and there is no evidence of Holocene activity. [3] Below 1000m, several parasitic cones lie on the southwest flank of the volcano. [4]

Stratovolcano Tall, conical volcano built up by many layers of hardened lava and other ejecta

A stratovolcano, also known as a composite volcano, is a conical volcano built up by many layers (strata) of hardened lava, tephra, pumice and ash. Unlike shield volcanoes, stratovolcanoes are characterized by a steep profile with a summit crater and periodic intervals of explosive eruptions and effusive eruptions, although some have collapsed summit craters called calderas. The lava flowing from stratovolcanoes typically cools and hardens before spreading far, due to high viscosity. The magma forming this lava is often felsic, having high-to-intermediate levels of silica, with lesser amounts of less-viscous mafic magma. Extensive felsic lava flows are uncommon, but have travelled as far as 15 km (9.3 mi).

Andes mountain range running along the tu mamide of South America

The Andes or Andean Mountains are the longest continental mountain range in the world, forming a continuous highland along the western edge of South America. This range is about 7,000 km (4,300 mi) long, about 200 to 700 km wide, and of an average height of about 4,000 m (13,000 ft). The Andes extend from north to south through seven South American countries: Venezuela, Colombia, Ecuador, Peru, Bolivia, Chile and Argentina.

Chile republic in South America

Chile, officially the Republic of Chile, is a South American country occupying a long, narrow strip of land between the Andes to the east and the Pacific Ocean to the west. It borders Peru to the north, Bolivia to the northeast, Argentina to the east, and the Drake Passage in the far south. Chilean territory includes the Pacific islands of Juan Fernández, Salas y Gómez, Desventuradas, and Easter Island in Oceania. Chile also claims about 1,250,000 square kilometres (480,000 sq mi) of Antarctica, although all claims are suspended under the Antarctic Treaty.

See also

Geology of Chile

The geology of Chile is a characterized by processes linked to subduction such as volcanism, earthquakes and orogeny. The buildings blocks of Chile's geology assembled during the Paleozoic Era. Chile was by then the southwestern margin of the supercontinent Gondwana. In the Jurassic Gondwana begun to split and the ongoing period of crustal deformation and mountain building known as the Andean orogeny begun. In the Late Cenozoic Chile definitely separated from Antarctica, the Andes expienced a great rise accomplained by a cooling climate and the onset of glaciations.


HidroAysén was a controversial megaproject that aims to build five hydroelectric power plants in Chile's Aysén Region, two on the Baker River and three on the Pascua River.

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  1. "Cay". Global Volcanism Program . Smithsonian Institution.
  2. D'Orazio, M.; Tamponia, M.; Tonarinib, S.; González-Ferránd, O.; Lahsend, A.; Omarinie, R. (August 2003). "The Quaternary calc-alkaline volcanism of the Patagonian Andes close to the Chile triple junction: geochemistry and petrogenesis of volcanic rocks from the Cay and Maca volcanoes (not, vert, similar45°S, Chile)". Journal of South American Earth Sciences. 16 (4): 219–242. Bibcode:2003JSAES..16..219D. doi:10.1016/S0895-9811(03)00063-4.
  3. José A. Naranjo; Charles R. Stern (December 2004). "Holocene tephrochronology of the southernmost part (42°30'-45°S) of the Andean Southern Volcanic Zone". Revista Geológica de Chile. 31 (2): 225–240. doi:10.4067/S0716-02082004000200003.
  4. M D'Orazio; F Innocenti; P Manetti; M Tamponi; S Tonarini; O González-Ferrán; A Lahsen; R Omarini (August 2003). "The Quaternary calc-alkaline volcanism of the Patagonian Andes close to the Chile triple junction: geochemistry and petrogenesis of volcanic rocks from the Cay and Maca volcanoes (∼45°S, Chile)". Journal of South American Earth Sciences. 16 (4): 219–242. Bibcode:2003JSAES..16..219D. doi:10.1016/S0895-9811(03)00063-4.