coast

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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.

Bibliography

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

COAST

(kohst) An optical interferometer at the Mullard Radio Astronomy Observatory.

coast

[kōst]
(engineering)
A memory feature on a radar which, when activated, causes the range and angle systems to continue to move in the same direction and at the same speed as that required to track an original target.
(geography)
The general region of indefinite width that extends from the sea inland to the first major change in terrain features.

coast

1. 
a. the line or zone where the land meets the sea or some other large expanse of water
b. (in combination): coastland
2. US
a. a slope down which a sledge may slide
b. the act or an instance of sliding down a slope

COAST

References in periodicals archive ?
Last Thursday the centre at the Coastlands Family Church, on Barry's Colcot estate, saw more than 35 people queuing at the door.
We are pleased to be entering such an attractive market and look forward to building a name for our American grill and sushi bar concept in the Coastland Center.
The new markets include Piracicaba, Rio Claro, Sao Joao da Boa Vista, North Coastland and Vale do Paraiba.
Installations in process for later this year are the Broadway Mall, The Galleria of White Plains and Trumbull Shopping Park in the New York market; Spring Hill Mall and Golf Mill in Chicago; North DeKalb Mall and Shannon Southpark in Atlanta; San Jacinto Mall and Sharpstown Center in Houston; Coastland Center in Ft.
Over six months, pupils from Milford Haven School became "Reading Ambassadors" and visited Hakin and Coastlands primary schools once a fortnight to support the younger children with their reading.
The coastlands include the northern basin of the Mackenzie River drainage area.
She was delighted to hand out presents to 1,200 children at Coastlands Family Church in Barry, South Wales.
While winemaker Ross Cobb was studying biology at the University of California, Santa Cruz, in the late 1980s, his father, David, was establishing Coastlands Vineyard in the Free-stone/Occidental area of California's Sonoma Coast.
Cosponsors of the conference included the Southern Professional Nurses Network Chapter of GNA, Mu Kappa Chapter of Sigma Theta Tau International Nursing Honor Society, Magnolia Coastlands AHEC, and the School of Nursing at Georgia Southern University in partnership with the Georgia Southern University Division of Continuing Education.
Just because the trees are bare and there's a chill in the air doesn't mean you have to stay indoors and forget all about our beautiful Welsh coastlands.
When the 'Walypala', whitefellas, arrived from the eastern coastlands pushing ever westward in the search for land and water the Anangu offered their knowledge rather than any hostility and were openly eager to share and show.
Kapiti Coast's iconic Coastlands Mall is in for a $17 million redevelopment.