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Koko Nor,salt lake, China: see Qinghai HuQinghai Hu
or Koko Nor
, salt lake, c.1,625 sq mi (4,210 sq km), in the Tibetan highlands, NE Qinghai prov., China; one of the largest lakes in China. At an altitude of 10,515 ft (3,205 m), it is shallow and brackish and of little economic value.
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a mountain range in China; part of the Nan Shan. In the southwest it borders the Koko Nor Plain. Length, more than 300 km; altitude, to 4,120 m. It is composed mostly of granites and other crystalline rock. In the central part it forms a narrow, high mountain chain with neve and small glaciers. In the west and east the range drops sharply, acquiring a mid-mountain, ridgy appearance. Arid steppe landscapes with areas of pea shrub prevail.
(Mongolian, “blue lake”), or Chinghai or Tsinghai, the largest mountain lake without an outlet in Central Asia; located in China. Length, about 105 km; maximum width, 65 km; area, approximately 4,200 sq km, maximum known depth, 38 m.
Lying at an altitude of 3,205 m, the lake occupies the central part of the Koko Nor Plain. The shoreline has few indentations; ancient lake-shore terraces are well developed (up to 50 m in elevation). The botton is composed chiefly of silts. There are several sand islands. A total of 23 rivers flow into Koko Nor, with the largest of them being the Buhain Gol, which forms a delta that empties into the lake on the west. The summer high water on the rivers causes seasonal fluctuations in the lake’s level. In the summer the water warms to 18°−20°C, and from November through March the lake is frozen. Water mineralization during the dry periods reaches 11.3 g per liter. Fish are found in the lake, chiefly of the Cyprinidae family. The first European who studied Koko Nor was N. M. Przheval’skii (in 1872).