Cordón del Azufre is an inactive complex volcano located in the Central Andes, at the border of Argentina and Chile.

[12] Cordón del Azufre is located 300 kilometres (190 mi) east of the Chile Trench, where the subduction takes place.

[14] The landscape is largely devoid of through-going drainages, as the extreme dryness and the frequent blockages by lava flows prevent its development.

Renewed activity would likely consist of lava flows and pyroclastic deposits and, in light of the total lack of important roads and habitation, potential future eruptions are no threat.

[34] The centre of the uplifting area is between the volcanoes Lastarria and Cordón del Azufre, and has been named "Lazufre" after the acronym,[18] but Cerro Bayo Gorbea is sometimes included in it.

[32] Lastarria, Cordón del Azufre and Cerro Bayo Gorbea form linear fissures that emanate from the centre of the Lazufre uplift,[35] which is surrounded by a ring of Quaternary volcanoes and may be a developing caldera.

[2] Magnetotelluric data show a zone with high electrical conductivity that rises from the mantle into the crust, and may be the magma supply to Lazufre.

[41] Research published in 2016 indicated that the uplift has been ongoing since at least 400,000 years, based on the deformation of lava flows and volcanoes erupted within this time period.