The New Guinea Highlands, also known as the Central Range or Central Cordillera, is a long chain of mountain ranges on the island of New Guinea, including the island's tallest peak, Puncak Jaya, Indonesia, , the highest mountain in Oceania. The range is home to many intermountain river valleys, many of which support thriving agricultural communities. The highlands run generally east-west the length of the island, which is divided politically between Indonesia in the west and Papua New Guinea in the east.
Geography
The Central Cordillera, some peaks of which are capped with ice, consists of (from east to west): the Central Highlands and Eastern Highlands of Papua New Guinea including the Owen Stanley Range in the southeast, whose highest peak is Mount Victoria at 4,038 metres (13,248 feet), the Albert Victor Mountains, the Sir Arthur Gordon Range, and the Bismarck Range, whose highest peak is Mount Wilhelm at 4,509 metres (14,793 feet), which is an extinct volcano with a crater lake; the Star Mountains on the Papua New Guinea–Indonesia border; and the Maoke Mountains or Snow Range in Indonesia, where perpetual snow was found by H. A. Lorentz in 1909 at 4,461 m (14,635 ft), and whose highest peaks are Puncak Jaya (Mt. Carstensz) at 4,884 m (16,024 feet), Puncak Mandala (Mt. Juliana) at 4,760 m (15,610 ft) and Puncak Trikora (Mt. Wilhelmina) at 4,750 m (15,580 ft).
Although some valleys such as the Waghi Valley in the Western Highlands, Papua New Guinea are heavily cultivated and support urban settlements most of the mountains have traditional tribal village communities in the grassy mountain valleys. The PNG highland provinces are: Eastern Highlands Province; Simbu Province (or Chimbu) whose centre is the small coffee-growing town of Kundiawa on the Wahgi River near Mount Wilhelm; Jiwaka Province; the Western Highlands; the rugged Enga Province the home of the Enga people with its administration in the very small town of Wabag on the Lai River, and containing the large Porgera Gold Mine; Hela Province; Southern Highlands Province, with its centre in the small town and airport of Mendi, and containing the Huli wigmen area around the town of Tari; and parts of West Sepik Province and Western Province. The Highlands Highway connects many of these towns. Larger urban areas in the PNG Highlands include the Western Highlands capital and PNG's 3rd largest city Mount Hagen (near the extinct Mount Hagen (volcano)), the Eastern Highlands capital and former colonial town of Goroka, and the mining town of Tabubil. The climate is humid as you would expect of the tropical rainforested island of New Guinea, but the higher mountain slopes are of course cooler than the lowlands.
The Highlands are the source of a number of important rivers including the Sepik River and Ramu River in the north and the Fly River in the south, and lakes including Lake Kutubu, near which oil has been extracted since 1992 by Chevron. Mining is also very active in the region to the detriment of indigenous groups, with frequent friction.
Topography
List of highest peaks in New Guinea Highlands by elevation.
Rivers
List of rivers in New Guinea Highlands by length.
Geology
This chain of mountains continues to rise (with corresponding quakes) as the Australian Plate collides with the plates to the northeast, marking the southern boundaries of the Maoke and Woodlark plates. The width of the mountain range varies considerably, with a central thin segment near the borders of the two nations.
The surface geology of the highlands is made up of metamorphic and intrusive igneous rocks. The metamorphic rocks were Cretaceous and Eocene ocean sediments that were uplifted and folded between the Eocene and early Miocene periods. There are also Pleistocene stratovolcanoes in the highlands, including Mount Hagen and Mount Giluwe.