Lauca volcano is a 5,140 metres (16,860 ft) high andesitic stratovolcano in the Central Volcanic Zone of the Andes in the Altiplano in northern Chile. It was active 10.5 million years ago. Amphibole rich lava flows formed a uniform volcanic cone. A later major ignimbrite eruption caused the collapse of the centre and formed the Lauca ignimbrite. A caldera is present, with a lava dome at the northeastern rim.