Global Volcanism Program | Image GVP-11442
Cerro del León (center) is an andesitic stratovolcano flanked by two massive dacitic lava domes, Chillahuita to the SE (the circular dome to the lower right) and Chao to the NW. Chao forms the massive box-shaped dome and lava flow at the top center in this NASA International Space Station image (with north to the upper left) and is the world's largest of its type. The 14.5-km-long dacitic lava flow has distal margins that are 350-400 m high and formed in several eruptive pulses.
NASA International Space Station image ISS005-E-8788, 2002 (http://eol.jsc.nasa.gov/).
This image is made available as a Public Domain Work, but proper attribution is appreciated.