Los Gemelos-El Saladillo
From Wikipedia, the free encyclopedia
Los Gemelos-El Saladillo are monogenetic volcanoes in Argentina.
The Nazca Plate subducts beneath the South America Plate, giving rise to the volcanism in the Andean Central Volcanic Zone, including mafic back-arc volcanism which is often associated with tectonic lineaments.[1]
Los Gemelos (24°45′S 66°10′W / 24.750°S 66.167°W) and El Saladillo (24°33′23″S 66°12′10″W / 24.55639°S 66.20278°W) lie in the Calchaqui Valley, close to the towns of La Poma and El Saladillo.[2] The valley is bordered by two thrust faults, at least one (the Calchaqui fault) of which has had historical earthquakes;[3] the Los Gemelos volcanic cones were constructed along the fault.[4]