Volcán Socompa is a massive, 6051-m-high dacitic stratovolcano noted for an eruption about 7200 years ago, similar to that at Mount St. Helens in 1980. The Socompa eruption produced a massive 600 sq km debris-avalanche deposit, much larger than at St. Helens, that extends about 40 km from the summit. This view from the north shows dark-colored post-collapse lava domes on the right side that have filled much of the head of the massive collapse scarp, which extends to the base of the volcano at the lower right. Photo by Carlos Felipe Ramírez (courtesy of Oscar González-Ferrán, University of Chile).