 They together with El Fraile, Cerro El Muerto, Nevado Tres Cruces and El Solo form a long volcanic chain.The area is dominated by volcanoes that were active after 1.5 million years ago.Also located close to Incahuasi are Falso Azufre and Nevado San Francisco, as well as the Miocene Cerro Morocho and Cerro Ojo de Las Lozas volcanoes.