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COAST - 32 reference results
coast protection, methods used to protect coastal lands from erosion. Beaches can exist only where a delicate dynamic equilibrium exists between the amount of sand supplied to the beach and the inevitable losses caused by wave erosion. Various activities of man have upset this equilibrium, decidedly increasing the rate of erosion of the shorelines. For example, the plethora of dams constructed across major drainage systems has served to entrap sediment that would normally reach the coastal zone, imperiling the existence of beaches by cutting off their natural sand supply. Mining of beach sand has removed millions of tons of sand from coasts and drastically upset the balance between natural supply and losses. Historically, people have considered coast protection a local problem and have attacked the problem by building structures to inhibit the transportation of sand from a local area. However, it has been learned that building structures to solve a local erosion problem may extend and intensify the erosion problem along nearby beaches, requiring the construction of structures along an entire coast. For example, many structures block littoral drift, which is a movement of sand parallel to the coast, both on the beach and offshore, caused by waves. The blockage results in a depletion of sand downcurrent from the structure. Several different kinds of structures are built. Sea walls are constructed at the edge of the shore facing the ocean waves. Designed to protect only the beach areas behind them, they cause an increased loss of sediment in front of and beneath them. Breakwaters are long piers built offshore parallel to the shoreline; they are designed to provide calm anchorages in an area behind them called a wave shadow. At the breakwater off Santa Monica, Calif., the wave shadow impeded the littoral drift, producing a deposition of sand behind the breakwater and extensive erosion of the beach downcurrent. Groins are lines of rock or pilings constructed perpendicular to the shoreline. They act as a partial barrier to littoral drift, trapping sand on the updrift side and causing erosion on the downdrift side. Jetties are often built at river mouths and harbor entrances, projecting out into the ocean to direct and confine littoral currents and to prevent silting of the harbor entrance. Jetties cause the same problems of downdrift erosion as groins. In some instances it has been necessary to pump the sand trapped by the structure to adjacent beaches downdrift. Efforts have also been made to prevent erosion using the natural materials at hand. Artificial dunes have been built by bulldozing sand back from the beach or by placing snow fences to trap windblown sand. Since beaches themselves are effective in dissipating wave energy, one remedy to the lack of a sand supply is to pump sand directly onto the beach from interior or offshore zones. Unlike other human-made structures, artificial beaches do not harm the shore downdrift.
coast guard, special naval force assigned to seaboard duties. Its primary responsibilities usually consist in suppressing contraband trade and aiding vessels in distress. The British coast guard was established just after the Napoleonic Wars for the purpose of preventing smuggling. When the Coast Guard Act of 1856 put this task under the direction of the admiralty, the British coast guard was reorganized to perform coast-watching and lifesaving duties. In the United States a coast guard was formed in 1915 when an act of Congress combined the Revenue Cutter Service with the Life Saving Service. The cutter service had been established by Congress in 1790, at the suggestion of Alexander Hamilton, to prevent smuggling; until the creation of the navy in 1798 it was the only U.S. armed service afloat. The Life Saving Service developed some years later. The U.S. Coast Guard subsequently absorbed the Lighthouse Service (1939) and the Bureau of Marine Inspection and Navigation (1942). In peacetime the Coast Guard is under the jurisdiction (since 2003) of the Dept. of Homeland Security; in wartime, and for such other periods as the president may direct, it is under the control of the navy. In addition to its rescue and antismuggling activities, the service enforces navigation rules and maintains jurisdiction over the regulations concerning the construction and equipment of merchant ships and over the licensing of merchant marine officers and seamen. It also operates and maintains weather ships, an ice patrol in the N Atlantic, and various navigational aids, including lighthouses, lightships, buoys, and loran stations. The Coast Guard Academy, for the training of officers, is located in New London, Conn.

See studies by M. F. Willoughby (1957), H. R. Kaplan (1972), and G. Gurney (1973).

coast, land bordering an ocean or other large body of water. The line of contact between the land and water surfaces is called the shoreline. It fluctuates with the waves and tides. Sometimes the terms coast and shore are used synonymously, but often shore is interpreted to mean only the zone between the shorelines at high tide and low tide, and coast indicates a strip of land of indefinite width landward of the shore. Classically, coasts have been designated as submergent if they resulted from a rise in the relative sea level and emergent if they resulted from a decline. Young submergent coasts usually are irregular and have deep water offshore and many good harbors, either bays or estuaries. Much of the coast of New England and most of the Atlantic coast of Europe are young submergent coasts according to this classification scheme. Gradually the submergent coast, subjected to erosive attacks of the ocean and other agents, becomes mature. Headlands are worn back to form cliffs, at the base of which deposits of eroded material accumulate as fringing beaches; spits and bars also grow up from material that is carried by currents and deposited in deeper water. The shoreline is called mature when it is smooth, the headlands having been cut away and the bays either filled up or closed off by spits. Emergent shorelines usually have shallow water for some distance offshore. Such shorelines are found along the Atlantic coast of the SE United States and along part of the coast of Argentina, near the Río de la Plata. This classification system does not adequately describe many coasts, partly because many of them exhibit features of both submergence and emergence. Because of these and other problems a classification system that is based on the most recent and predominant geologic agent forming the coast has become popular. Under this scheme, there are essentially two major types of coasts. Primary coasts are youthful coasts formed where the sea rests against a land mass whose topography was formed by terrestrial agents. These coasts include land erosion coasts (Maine), volcanic coasts (Hawaii), deposition coasts (Nile Delta coast), and fault coasts (Red Sea). Secondary coasts are formed chiefly and most recently by marine agents, and may even be primary coasts that have been severely modified by wave action. These coasts include wave erosion coasts, marine deposition coasts, and coasts built by organisms (reefs and mangrove coasts). The nature of the coastline of a country or a state is an important factor in its economic development because it relates to defense, fishing, recreation, and overseas commerce.

See C. A. M. King, Beaches and Coasts (2d ed. 1972).

United States Coast Guard Academy, at New London, Conn.; for training young men and women to be officers of the U.S. Coast Guard; established 1876, opened 1877 as United States Revenue Cutter Service School of Instruction, took its present name in 1915. The academy, differing from the other federal service academies, gains its candidates through a nationwide competition. There are no congressional appointments or geographical quotas. Each applicant must be between the ages of 17 and 22. A cadet's education consists of military and academic instruction, including professional training at sea. Cadets receive full scholarships to the academy as well as pay and allowances. Upon graduation they are appointed ensigns in the U.S. Coast Guard.

See I. Crump, Our United States Coast Guard Academy (1961).

Trucial Coast: see United Arab Emirates.
Slave Coast, name given by European traders to the coast bordering the Bight of Benin on the Gulf of Guinea, W Africa. It was the principal source of slaves from W Africa from the 16th cent. to the mid-19th cent.
Queen Mary Coast, region: see Antarctica.
Pirate Coast: see United Arab Emirates.
Mosquito Coast or Mosquitia, region, east coast of Nicaragua and Honduras. The name is derived from the Miskito, the indigenous inhabitants and remnants of the Chorotega. Never exactly delimited, the region is a belt c.40 mi (60 km) wide extending from the San Juan River north into NE Honduras. It is sultry and swampy, rising to low hills in the west. Lobstering has replaced banana cultivation as the major economic activity, but most inhabitants depend on subsistence farming.

In the early colonial period, English and Dutch buccaneers preyed on Spanish shipping from there, and English loggers exploited the forest. England established a protective kingdom at Bluefields in 1678. Slaves from Jamaica were brought in to increase the labor supply. In 1848, the British took San Juan del Norte to offset U.S. interest in a transisthmian route to California. Nicaragua protested the seizure. The Clayton-Bulwer Treaty (1850) between the United States and Great Britain checked British expansion, but relinquishment of the coast was delayed until a separate treaty was concluded with Nicaragua (1860), which established the autonomy of the so-called Mosquito Kingdom.

In 1894, José Santos Zelaya ended the territory's anomalous position by forcibly incorporating it into Nicaragua. The northern part was awarded to Honduras in 1960 by the International Court of Justice, thus ending a long-standing dispute. The Nicaraguan portion was officially given partial autonomy in 1987, including control over local natural resources, but little real change has resulted and the area remains impoverished.

Malabar Coast, SW coast of India stretching c.525 mi (845 km) from Goa to the southern tip of the peninsula at Kanniyakumri (Cape Comorin), primarily in Kerala state and the northern part of Karnataka state. It is a narrow coastal plain bounded by the Western Ghats. Monsoon rains make the coast a fertile rice-growing region. It was the scene of trade struggles in the 16th and early 17th cent. between the Portuguese and their European and Indian rivals. In the late 17th cent. the British gained control of the region.
Ivory Coast: see Côte d'Ivoire.
Grain Coast, W Africa, former name of a part of the Atlantic coast that is roughly identical with the coast of modern Liberia. In the 15th cent. "grains of paradise," i.e., seeds of the melegueta pepper, became a major export item; hence the name Grain Coast.
Gold Coast: see Ghana, republic.
Gold Coast, city (1991 pop. 256,275), Queensland, E Australia, on the Pacific Ocean. The city, a major resort, stretches for many miles along the coast and extends into New South Wales. In 1994, Queensland decided to amalgamate the city with Albert Shire to create one of three new "super cities." The amalgamation made Gold Coast the second largest municipality in Australia after Brisbane. Its new boundaries extend south to Coolangatta on the border with New South Wales, west to Mt. Tamborine in the remote interior, and north to Beenleigh on the edge of Brisbane.
George V Coast, region: see Antarctica.
Coromandel Coast, east coast of Tamil Nadu and Andhra Pradesh states, SE India, stretching more than 400 mi (644 km) from Point Calimere, opposite the northern tip of Sri Lanka to the delta of the Krishna River. Its major cities, Nagapattinam, Puducherry (Pondicherry), and Chennai (Madras), are ports. The inland coastal plain is bounded by the Eastern Ghats and includes the debouchments of the Penner, Palar, Ponnaiyar, and Kaveri rivers. The name probably stems from Cholomandalam, i.e., land of the Chola, an empire that ruled the region from the 9th to the 12th cent.
Coast Salish: see Salish.
Coast Ranges, series of mountain ranges along the Pacific coast of North America, extending from SE Alaska to Baja California; from 2,000 to 20,000 ft (610-6,100 m) high. The ranges include the St. Elias Mts. in SE Alaska and SW Yukon, which have the highest elevations; a partially submerged portion that forms the islands off the coast of SE Alaska and British Columbia; the Olympic Mts. in Washington; the Coast Ranges in Oregon; the Klamath Mts., Coast Ranges, and Los Angeles Ranges in California; and the Peninsular Range in Baja California. The Coast Ranges are rugged, geologically young mountains formed by faulting and folding and are composed mainly of granitic rock; the northern third is glaciated. N of San Francisco the ranges are humid and thickly forested; the southern parts are dry and covered with brush and grass. Lumbering, mining, and tourism are important.
Coast Mountains, range, W British Columbia and SE Alaska, extending c.1,000 mi (1,610 km) parallel to the Pacific coast, from the mountains of Alaska near the Yukon border to the Cascade Range near the Fraser River. Mt. Waddington (13,260 ft/4,042 m) is the highest peak. The geologically complex range, composed mainly of metamorphic rocks, slopes steeply to the Pacific Ocean, where the shoreline is deeply indented by fjords. The Coast Mts. have been heavily eroded by mountain glaciers; numerous rivers, including the Fraser, the Skeena, and the Stikine, have cut deep gorges across the range. The average annual precipitation of c.90 in. (230 cm) makes the region one of the wettest parts of Canada. Its slopes are heavily forested, and lumbering is important. In the Coast Mts. is Kemano, one of Canada's largest hydroelectric plants. The Coast Mts. are sometimes confused with the geologically distinct Coast Ranges.
Cape Coast, town (1984 pop. 57,224), capital of Central Region, S Ghana, on the Gulf of Guinea. Known locally as Gna or Oegna, the town is an export port and fishing center. The town originated as an Ashanti trading center. It grew up around European forts built in the 17th cent. The British made it their headquarters in 1664. It was capital of the Gold Coast until superseded by Accra in 1877. Cape Coast is also an educational center.
Barbary Coast, waterfront area of San Francisco, Calif., in the years after the 1849 gold rush. Gamblers, gangsters, prostitutes, and confidence men flourished, and the brothels, saloons, and disreputable boardinghouses made the Barbary Coast—named after the pirate coast of North Africa—notorious throughout the world.
or sequoia

Coniferous evergreen timber tree (Sequoia sempervirens) of the family Taxodiaceae, found in the fog belt of west-coastal North America. It grows in the coastal range from southwestern Oregon to central California at elevations up to 3,300 ft (1,000 m). The genus name commemorates the Cherokee Indian Sequoyah. The redwood is sometimes called coast redwood to distinguish it from the Sierra redwood (or big tree) and the Japanese redwood (or Japanese cedar). Redwoods are the tallest living trees, often exceeding 300 ft (90 m) in height; one has reached 368 ft (112 m). Typical trunk diameters are 10–20 ft (3–6 m) or more. The redwood tree takes 400–500 years to reach maturity; some are known to be more than 1,500 years old. As the tree ages, the lower limbs fall away, leaving a columnar trunk. Redwood timber has been used for furniture, shingles, fence posts, paneling, and fine wood objects. Today many of the remaining redwood stands are protected (see Redwood National Park; Sequoia National Park). Seealso dawn redwood.

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Coniferous, nonevergreen tree (Metasequoia glyptostroboides), the only living species of the genus Metasequoia, of the family Taxodiaceae, native to remote valleys of central China. Both branchlets and leaves grow out in pairs from points along the stem. The bright green, feathery leaves turn reddish brown in autumn. Though Metasequoia fossils are abundant, the tree was thought to be extinct until living specimens were discovered in the 1940s. Only a few thousand are known to have survived, in central China. Since these stands were discovered, seeds and cuttings have been planted throughout the world.

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National park, northwestern corner of California, U.S. It was established in 1968, expanded in 1978, and designated a World Heritage site in 1980. It preserves virgin groves of ancient redwood trees, including the world's tallest, 367.8 ft (112.1 m) high. It also includes 40 mi (65 km) of scenic Pacific coastline. It covers an area of 172 sq mi (445 sq km), including land in three state parks.

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or shore

Broad area of land that borders the sea. The coastlines of the world's continents measure about 193,000 mi (312,000 km). They have undergone shifts in position and changes in shape over geologic time because of substantial changes in the relative levels of land and sea. Other factors that alter coasts are erosion processes such as wave action and weathering, deposition of rock debris by currents, and tectonic activity. Coastal features result largely from the interaction and relative intensity of these processes, though the type and structure of the underlying rocks also play a part.

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formerly Trucial States

Country, Middle East, southwestern Asia. It is a federation of seven states on the eastern coast of the Arabian Peninsula. They are the emirates of Abū Zsubdotabī (Abu Dhabi), Dubayy (Dubai), aynAjmān, Al-Shāriqah (Sharjah), Umm al-Qaywayn, Rahamzahs al-Khaymah, and Al-Fujayrah. Area: 32,280 sq mi (83,600 sq km). Population (2005 est.): 4,690,000. Capital: Abu Dhabi. The indigenous inhabitants are Arabs, but there are a large number of South Asian and Iranian migrant workers. Languages: Arabic (official), English, Persian, Urdu, Hindi. Religions: Islam (official; predominantly Sunni); also Christianity, Hinduism. Currency: UAE dirham. The UAE's low-lying desert plain is broken by the Hsubdotajar Mountains along the Musandam Peninsula. Three natural deepwater harbours are located along the Gulf of Oman. The UAE (mainly Abū Zsubdotabī) has roughly one-tenth of the world's petroleum reserves and significant natural gas deposits, the production of which are the federation's principal industries. Other important economic activities include fishing, livestock herding, and date production. The federation has one appointive advisory board; its chief of state is the president, and the head of government is the prime minister. In 1820 the British signed a peace treaty with the region's coastal rulers. The area, formerly called the Pirate Coast, became known as the Trucial Coast. In 1892 the rulers agreed to entrust foreign relations to Britain, but the British never assumed sovereignty; each state maintained full internal control. The states formed the Trucial States Council in 1960 and in 1971 terminated defense treaties with Britain and established the six-member federation. Rahamzahs al-Khaymah joined it in 1972. The UAE aided coalition forces against Iraq in the Persian Gulf War (1990–91).

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or Miskito Coast

Region along the coast of eastern Nicaragua and Honduras. It comprises a lowland about 40 mi (65 km) wide that skirts the Caribbean Sea for about 225 mi (360 km). It was visited by Christopher Columbus in 1502, but Europeans had little contact with the area until the rise of the buccaneers in the 17th century, after which England established a protectorate there. It is named for the Miskito Indians. Spain, Nicaragua, and the U.S. disputed England's protectorate until the Clayton-Bulwer Treaty (1850). In 1894 the region was incorporated into Nicaragua, but the northern part was granted to Honduras in 1960 by the International Court of Justice. The chief town is Bluefields, at the mouth of the Escondido River in Nicaragua.

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Region, southwestern coast of India, stretching from the Western Ghats to the Arabian Sea. It now includes most of Kerala state and the coastal region of Karnataka state. It has sometimes been used to refer to the entire western coast of peninsular India. A large part of it was within the ancient kingdom of Keralaputra. The Portuguese established trading posts there; they were followed by the Dutch in the 17th century and the French in the 18th century. The British gained control of the region in the late 18th century.

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or Ivory Coast officially Republic of Côte d'Ivoire

Encyclopædia Britannica, Inc.Country, western Africa. Area: 123,863 sq mi (320,803 sq km). Population (2008 est.): 19,624,000. Capital: Yamoussoukro; de facto capital Abidjan. The population consists of various ethnic groups, notably the Akan and Mande. Languages: French (official), Baule, Anyi, Bete, Bambara, Dan. Religions: Islam, Christianity, traditional beliefs. Currency: CFA franc. Côte d'Ivoire can be divided into four major regions: a narrow coastal region, an equatorial rainforest in the west, a cultivated forest zone in the east, and a savanna region in the north. Agriculture employs about half the workforce. The country is a major producer of cocoa and petroleum; other exports include timber and wood products and coffee. It is a republic with one legislative house; its chief of state and government is the president, assisted by the prime minister. European powers came to the area to trade in ivory and slaves beginning in the 15th century, and local kingdoms gave way to French influence in the 19th century. The French colony of Côte d'Ivoire was founded in 1893, and full French occupation took place in 1908–18. In 1946 it became a territory in the French Union; in 1947 the northern part of the country separated and became part of Upper Volta (now Burkina Faso). Côte d'Ivoire peacefully achieved autonomy in 1958 and independence in 1960, when Félix Houphouët-Boigny was elected president. The country's first multiparty presidential elections were held in 1990. Political turmoil has persisted since Houphouët-Boigny died in 1993, and a civil war in 2002 left the country divided into northern and southern sections. Attempts at reconciliation were initiated over the following years, including a 2007 power-sharing agreement signed by both sides.

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Section of the coast of the Gulf of Guinea, western Africa. Extending approximately from Axim, Ghana, in the west to the Volta River in the east, it was so called because it was an important source of gold. It was an area of intense colonial rivalry from the 17th century. Acquired as a colony by the British in the 19th century and named the Gold Coast, the area achieved independence as the Republic of Ghana in 1957.

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Mediterranean coastal region, North Africa. It extends from Egypt to the Atlantic Ocean. Once part of Roman Africa, the region was overrun by Vandals in the 5th century AD. Reconquered by the Eastern Roman Empire (Byzantine Empire) circa AD 533, it was overcome by Arabs during the 7th century and was eventually broken up into the independent Muslim polities known collectively as the Barbary states (Morocco, Algeria [Algiers], Tunisia [Tunis], and Libya [Tripoli]). For centuries the coast was notorious as a haven for pirates, who ravaged shipping and collected tribute from European states. After the U.S. war with Tripoli (see Tripolitan War), the U.S. expedition to Algiers (1815), and the bombardment of Algiers by the British (1816), the pirates ceased exacting tribute.

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