Cerro Machín is a stratovolcano located in Tolima Department, Colombia. Cerro Machin is a volcanic plug that is approximately the same age (1,000,000+ years) as the Ruiz-Tolima Massif and has the appearance of being part of that volcanic system. Its sisters are Nevado del Tolima, 17,060 feet (5,200 m); Santa Isabel, 16,240 feet (4,950 m), Nevado del Ruiz, 17,457 feet (5,321 m), plus nine other lesser volcanoes and a 10,000 feet (3,000 m) volcanic South Wall containing in excess of thirty volcanic domes.
- ^ a b c "Machín". Global Volcanism Program, Smithsonian Institution. http://www.volcano.si.edu/world/volcano.cfm?vnum=1501-04%3D. Retrieved 2007-01-19.