Bilauktaung Range

Bilauktaung Range, mountain chain in south-east Myanmar (previously called Burma), defining part of the country's border with Thailand. The range, which runs north-east to south-west, is also known as the Tenasserim or Tavois mountains. It begins at Three Pagodas Pass, about midway between the city of Moulmein and the town of Tavoy, and extends southward for about 400 km (250 mi) before dropping off sharply to the Andaman Sea. The highest elevations are at Ngayannik Yuak Taung (1,531 m/5,023 ft) and Palan Taung (1,455 m/4,774 ft). The steep descent to the Andaman Sea creates a narrow coastal plain that is widest near the town of Mergui. The central spine of the Bilauktaung Range is made up of granite and granodiorite (granite and quartz-containing diorite) dating from the Cretaceous Period (136 million to 65 million years ago). Sandstone rocks are also found in some areas. A major portion of the country's important tin, tungsten, and antimony deposits are located in the range. The mountains are heavily forested. Since the 1980s the Myanmar government has allowed Thai logging companies to harvest limited quantities of timber on Myanmar slopes.