Tibet, Relief

Tibet is on a high plateau—the Plateau of Tibet—surrounded by enormous mountain masses. The relatively level northern part of the plateau is called the Ch'iang-t'ang; it extends more than 800 miles (1,300 kilometres) from west to east at an average elevation of 15,000 feet (4,500 metres) above sea level. The Ch'iang-t'ang is dotted with brackish lakes, the largest of these being Lakes Ch'i-lin and