Karak, a small rocky island in the Persian gulf, in lat, 29° 14' N., Ion. 50° 20' E., about 15 m. in circumference, and 40 m. N. W. of Bushire; pop. about 3,000. It affords a safe anchorage, especially during the prevailing N. W. gales. The soil is fertile and the water is good, but there is no timber. The Dutch erected a fort here in the middle of .the 18th century, but were soon compelled to evacuate the island. From 1839 to 1841 it was occupied by the English, and in December, 1856, the English expedition against Persia landed on its S. E. coast.

KARAKORl'M, or Mustag Mountains, also called Tsung Ling, a range of central Asia, extending S. E. from about lat. 37° N. and Ion. 73° E. to lat. 34° N. and Ion. 79° E., and separating the British province of Cashmere from Chinese Tartary. The N. W. extremity reaches'the Hindoo Koosh, and the S. E. ridges separate the western spurs of the Kuen-lun on the north from those of the Himalaya on the south. One of their peaks, the Dapsang, is 28,278 ft. high, and several others exceed 27,000 ft. The average height of the principal ridges is 25,000 ft., and even the lowest valleys are 10,000 ft. above the sea. The researches of the brothers Schlagintweit and of George W. Hay ward, who was murdered in 1870 in the Karakorum valley, have demonstrated that the Karakorum mountains constitute the watershed of High Asia.