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Annamite Range

Mountain range in Mainland Southeast Asia

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Photograph of landscape in Pu Mat National Park, Annamite Range in Vietnam .
Rolf Müller ( User:Rolfmueller ) · CC BY-SA 3.0

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Through Drainage basin, Coastal plain and Plateau

Geography

The highest points of the Annamite Range are the 2,819 m (9,249 ft)-high Phou Bia, the 2,720 m (8,920 ft)-high Phu Xai Lai Leng and the 2,598 m (8,524 ft)-high Ngọc Linh (Ngoc Pan). The latter is located at the northwestern edge of the Triassic Kontum Massif in central Vietnam. Important mountain passes are the Nape Pass and the Mụ Giạ Pass.

The Annamite Range runs parallel to the Vietnamese coast, in a gentle curve which divides the basin of the Mekong River from Vietnam's narrow coastal plain along the South China Sea. Most of the crests are on the Laotian side. The eastern slope of the range rises steeply from the plain, drained by numerous short rivers. The western slope is more gentle, forming significant plateaus before descending to the banks of the Mekong. The range itself has three main plateaus, from north to south: Phouane Plateau, Nakai Plateau and Bolaven Plateau.

Laos lies mostly within the Mekong basin, west of the divide, although most of Houaphan Province and a portion of Xiangkhoang Province (where the famous Plain of Jars is located) lie east of the divide. Most of Vietnam lies east of the divide, although Vietnam's Tây Nguyên (Central Highlands) region lies west of the divide, in the Mekong basin.

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