Cerro Torta

Cerro Torta is a dacitic lava dome in Argentina. Approximately high, it covers an area of with of rocks. Cerro Torta is about 430,000 years old and is part of a recent volcanic series together with Cueros de Purulla and Cerro [Blanco (volcano)|Cerro Blanco]. A seismic swarm recorded on the 23 January 2009 at Cerro Torta most likely reflects underground movement of magma, but a source in tectonic faulting close to the dome is also possible. There are also underground anomalies in seismic tomography images.
The dome lies in the Central [Volcanic Zone] of the Andes, in the Ojos del Salado region. It is surrounded by Miocene and Pliocene volcanoes, but there also are Quaternary volcanoes in the area such as Falso Azufre west-southwest and El Peinado north. Peinado and several mafic monogenetic volcanoes form an alignment with Cerro Torta. San Francisco Pass is nearby.