Sierra Nevada de Lagunas Bravas

Sierra Nevada, also known as Sierra Nevada de Lagunas Bravas, is a major ignimbrite-lava dome complex<ref name="KayMpodozis2013" /> which lies in both Chile and Argentina in one of the most remote parts of the Central Andes.

Activity in the complex started in Argentina and formed two stratovolcanoes. Later, 12 or more vents formed, some with craters up to Template:Convert wide. Lava flows up to Template:Convert long with flow ridges are also found. It covers a total area of 225 km².<ref name="GVP">Template:Cite GVP</ref> Radiometric dating has yielded ages of 1.7 ± 0.4 to 0.431 ± 0.012 million years ago,<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> a lava flow from the neighbouring Azufrera Los Cuyanos volcano that is sometimes considered part of Sierra Nevada is 140,000 years old.<ref>Polanco, E., J. Clavero, and R. Arcos. "Cadena Volcánica Los Cuyanos-Sierra Nevada: geoquímica y edades Ar/Ar, Zona Volcánica Central, Región de Atacama, Chile (26° 26’S)." XIX Cong Geol Arg Actas S24–3-16 (2014).</ref> Together with Cerro el Condor and Peinado it forms the Culampaja line, a line of volcanoes that reaches Cerro Blanco.<ref>Template:Cite journal</ref> Strong seismic attenuation is observed beneath Sierra Nevada.<ref name="KayMpodozis2013">Template:Cite journal</ref> Hydrothermally altered rocks in Sierra Nevada may be the source of sulfate and arsenic in the Juncalito and Negro rivers, and heat sources for regional hot springs.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> The snowline in the area lies at Template:Convert altitude at Cumbre del Laudo.<ref>Template:Cite journal</ref>

First ascent

Sierra Nevada's main summit was one of the last Template:Convert peaks climbed in the Andes.<ref>Template:Cite book </ref> It was thought that its secondary summit, Template:Convert Template:Coord, which sits on the border, was the highest. New measurements however show that the main summit is entirely in Argentina, Template:Convert east.<ref name=":0">{{#invoke:citation/CS1|citation |CitationClass=web }}</ref> The complex has 9 main summits.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

See also

• List of volcanoes in Argentina
• List of volcanoes in Chile

Sources

• Template:Cite book (in Spanish; also includes volcanoes of Argentina, Bolivia, and Peru)

Template:Catamarca-geo-stub Template:Atacama-geo-stub