Falso Azufre is a complex volcano at the border of Argentina and Chile.

Falso Azufre is elongated in east-west direction and contains craters and lava domes; most craters have diameters of 300 - 600 m with the exception of the main crater, which is 1 x 1.3 km wide. The highest summit Cerro Falso Azufre lies at the western end in Chile, which has mostly generated pyroclastic material from