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Oahu(ōä`ho͞o), island (1990 pop. 836,231), 593 sq mi (1,536 sq km), third largest and chief island of Hawaii, part of Honolulu co., between Molokai and Kauai. Oahu is composed of two parallel mountain ranges (Waianae and Koolau) that are separated by a rolling plain dissected by deep gorges. Mt. Kaala (4,040 ft/1,231 m) is the island's highest peak. Oahu has no active volcanoes, but there are many extinct craters, among them Diamond HeadDiamond Head,
peak, 761 ft (232 m) high, along the rim of an extinct volcano, SE Oahu island, Hawaii. A prominent point in the Honolulu skyline, Diamond Head was designated a national natural landmark to protect its slopes from the commercial development along world-famous
..... Click the link for more information. , Koko Head, and PunchbowlPunchbowl,
hill, 500 ft (152 m) high, in the city of Honolulu, SE Oahu island, Hawaii. In the bowllike extinct volcanic crater at the summit (reached by a scenic drive) is the National Memorial Cemetery of the Pacific, for those killed in World War II.
..... Click the link for more information. . Pearl HarborPearl Harbor,
land-locked harbor, on the southern coast of Oahu island, Hawaii, W of Honolulu; one of the largest and best natural harbors in the E Pacific Ocean. In the vicinity are many U.S. military installations, including the chief U.S.
..... Click the link for more information. indents the island's southern coast. Honolulu, the state capital and the economic center of Hawaii, is on the highly urbanized southern coast of Oahu. Manoa Valley is the site of the Univ. of Hawaii, Punahou Academy, and the Mid-Pacific Institute. The island is an important defense area that includes the headquarters of the U.S. Pacific Command and the Pearl Harbor naval base. There are many bathing beaches (including Waikiki), some of which have coral gardens. The large pineapple and sugarcane plantations that once dominated in rural areas of the island have closed down. Agriculture and fishing are important activities, but tourism is the economic mainstay of Oahu.
an island in the Pacific Ocean, part of the Hawaiian Islands (USA). Area, 1,574 sq km. Population, 630,000 (1970).
Oahu is the most densely populated and economically advanced of the Hawaiian Islands. Its terrain is mountainous, with elevations up to 1,228 m, and formed of lavas, primarily basaltic. The climate is tropical maritime and very humid. The coastal plains and the lower sections of the mountain slopes are planted with pineapple and sugarcane. Oahu is a popular tourist area. Its principal city and port is Honolulu. Pearl Harbor—one of the most important US military bases in the Pacific Ocean—is located on Oahu.