Incahuasi Central Volcanic Zone of the Andes together with about 110 other Quaternary volcanoes, and lies in the southern sector of the volcanic zone; other volcanic zones in the Andes are the Northern Volcanic Zone, the Southern Volcanic Zone and the Austral Volcanic Zone. The history of volcanic activity is poorly known for most of these volcanoes owing to the lack of dating; only a few historical eruptions have been recorded, such as an eruption at Ojos del Salado in 1993. Incahuasi is located northeast of Ojos del Salado, the highest volcano in the world. Both volcanoes are found at the
David Lim (mountaineer) peripheral nerves. Paralysed from eyes down, he spent six months in hospitals, and emerged partially disabled in both legs. He returned to mountaineering, and since 1999, has led more than 15 expeditions, including the first all-Singapore ascent of Argentina's Aconcagua (6962m), and the world's third solo of Ojos del Salado, the highest volcano in the world (6893m). In summer 2005, he led the first Southeast Asian team to climb virgin peaks in the Tien Shan mountain range on the Kazakh-Kyrgyz border. The team summitted three peaks, now officially recognised as Temasek, Singapura, and Ong Teng Cheong peaks. In 2009, he