evidence: Nelang Valley: Mountain Desert and a Blue River [...] At an altitude of 11,600 feet, located 45 kilometres from the Indo-China border in Gangotri National Park is a cold mountain desert called Nelang. The etymology of the word Nelang suggests that it means the ‘place of blue stones’. It was once an important centre for trade with Tibet. [...] The women of this tribe were good weavers of carpets, blankets and woollen clothes. Jadh Bhotia tribesmen would travel to the Tibetan plateau for trade through the Nelang and Jadung Valleys. Traded goods included livestock such as yak, sheep and goats and products made out of their wool and skin.