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see BorneoBorneo
, island (1990 pop. 9,102,906), c.287,000 sq mi (743,330 sq km), largest of the Malay Archipelago and third largest island in the world, SW of the Philippines and N of Java.
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(Borneo), an island in the Malay Archipelago; the largest of the Greater Sunda Islands. Area, 734, 000 sq km (with offshore islands, 746, 500 sq km); length (from southwest to northeast), about 1, 100 km. It is surrounded by the South China, Sulu, Celebes, and Java seas and the Makassar and Karimata straits. Most of Kalimantan (about 540, 000 sq km), is part of Indonesia. In the northern part of the island are the states of Sarawak and Sabah, which are part of Malaysia, and the British colony of Brunei.

Natural features. The coastal areas of Kalimantan are mostly low-lying, swampy, and weakly indented, with few good harbors. The sea is shallow along the western coast of the island; there is a barrier of coral reefs in places along the eastern coast. In the northwestern part of the island is the area of the ancient pre-Mesozoic Sunda platform, and in the southern and eastern parts of the island are regions of Mesozoic and alpine plicate formations. The central part of Kalimantan is composed of block mountains with elevations of 2, 000–3, 000 m that radiate from the center to the outlying sections of the island. The highest point on Kalimantan is Mount Kinabalu (4, 101 m), in the northern part of the island. The mountains are composed mainly of granites, gneisses, and crystalline schists. Smoothed summits and steep slopes predominate. The mountains are surrounded by a zone of hilly plains that give way to flat marshy lowlands. The mineral resources of Kalimantan include petroleum and coal, as well as ores of iron, manganese, chrome, molybdenum, and copper.

Kalimantan has an equatorial climate. The yearly average air temperature in the plains is 25°-27°C. The total annual precipitation, which is evenly distributed over the year, is 2, 000–3, 500 mm (up to 5, 000 mm in the mountains). There is a dry season of one to three months on the eastern coast. The river network is dense, and the rivers are deep throughout the year. The Kapuas, Barito, and Mahakam rivers are navigable for distances of several hundred kilometers from their mouths. There are frequent changes of the riverbeds on the plain, and the banks of the rivers become swampy. There are sandbanks and sandbars in the mouths of the rivers.

Strongly lixiviated and podzolized lateritic soils on a thick crust of weathering are predominant. More than three-quarters of Kalimantan is covered with forests. There is mangrove vegetation along the coasts. In the plains and the foothills of the mountains there are high-trunk, multilayered humid tropical forests of palm, bamboo, screw pine, and multitrunk rubber trees. There are very luxuriant mountain forests consisting of Dipterocar-paceae, sandalwood, rubber trees, and rasamala at elevations of up to 1, 500 m. The trees are often intertwined with vines and epiphytes, including abundant mosses. Evergreen oak, laurel, rhododendron, and coniferous trees (Bornean pine) are found at higher elevations. There are shrubs and meadows of various grasses on the summits of the mountains. Bushes and thickets of alang-alang and wild sugarcane predominate in the southeast as a result of the cutting of other vegetation.

The fauna of Kalimantan is extraordinarily rich and varied and includes elephants, large apes (orangutans, gibbons, and proboscis monkeys), slow loris (suborder Lemuroidea), Der-moptera (flying lemur), Chiroptera (fruit-eating flying foxes, insect-eating bats), bears, two-horned rhinoceros, and banteng. There are about 600 species of birds, including the hornbill, argus pheasant, and parrot. The insect and arthropod fauna is extraordinarily rich.

Less than 2 percent of Kalimantan is under cultivation, mainly in the valleys of the Barito and Kapuas rivers and on the northern coast. The principal items of cultivation are rice, rubber plants, and coconut palms. Copra production and fishing are also important economic activities. The population in 1969 was approximately 6.6 million, including 5 million on the Indonesian part of the island. The largest cities are Bandjermasin and Pon-tianak in Indonesia and Kuching in Malaysia.


Historical survey. Over a period of centuries the native population of Kalimantan—the numerous Ngadju, Ot-Danom, and Klemantan tribes, which are frequently united under the name “Dayaks”—was driven back into the remote regions of the island and partially assimilated by newcomers (Malays, Javanese, and Buginese). Beginning in the 13th century, many feudal principalities that had arisen in the coastal regions of Kalimantan became dependent on various Javanese rulers. The largest principalities on Kalimantan in the 16th century were Bandjermasin and Kutei in the southeast; Sambas, Mampawa, Landak, and Sukadana in the west; and Brunei in the north.

In the 17th century the European East India companies made the first attempts to consolidate their hold on Kalimantan. However, it was not until the end of the 18th century that the Dutch East India Company succeeded in concluding an inequitable treaty with the ruler of Pontianak and placing the sultan of Bandjermasin in a position of dependence. Sarawak fell into the hands of Europeans in the early 1840’s. The English adventurer James Brooke, who arrived in northern Kalimantan in 1839, was awarded the administration of Sarawak by the sultan of Brunei for his assistance in the suppression of an uprising of the local populace. Brooke soon became the independent rajah of Sarawak. Great Britain imposed an inequitable treaty upon Brunei in 1847. The Dutch colonizers began military operations in the 1850’s for the subjugation of the southeastern and western regions of Kalimantan. The Dutch suppressed a strong uprising in Bandjermasin in the 1850’s and 1860’s and established their direct rule there. By the end of the first decade of the 20th century, the Dutch succeeded in forcing the status of “self-governing” principalities upon the remaining sultanates of southeastern and western Kalimantan, which placed them under the strict control of the Dutch colonial administration. The English expanded their possessions in northern Kalimantan, with the assistance of the British North Borneo Company, which was founded in 1881. In 1888, Great Britain established a protectorate on the territory of present-day Sabah, Brunei, and Sarawak. The borders between English and Dutch possessions on Kalimantan were defined in 1891.

Kalimantan was occupied by Japan in December 1941. After Japan’s surrender in 1945, the Dutch colonizers, with the support of their protege, Sultan Abdul Hamid of Pontianak, created a puppet “state” on Kalimantan. After the Round Table Conference of 1949, the formerly Dutch part of Kalimantan became one of the United States of Indonesia and, in 1950, part of the Republic of Indonesia. In northern Kalimantan, Great Britain redeemed the “rights” to Sarawak from the Brooke dynasty in 1946. Sarawak then became a crown colony. Sabah was also made a crown colony in 1946. Sabah and Sarawak were included as states in the Malaysian Federation in 1963. During the preparation for the creation of Malaysia, an uprising broke out in Brunei in 1962 under the slogan of the independent unification of the territory of northern Kalimantan. The uprising was brutally suppressed.


Guber, A. A. Indoneziia. Moscow-Leningrad, 1932.
Republik Indonesia: Propinsi Kalimantan. [No place or date.]



the Indonesian name for Borneo: applied to the Indonesian part of the island only, excluding the Malaysian states of Sabah and Sarawak and the sultanate of Brunei. Pop.: 11 341 558 (2000)
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Under the terms of the agreement, Cyprus will have the exclusive right to further explore and develop the East Kalimantan coal property and acquire an 85% interest.
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