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 ?
Where: Coastland Center 1750 Tamiami Trail North Naples, FL 34102
BEIRUT: The Lebanese government must take urgent and immediate steps to avoid the "irreversible" effects of climate change, which threaten to submerge large parts of the country's coastland, environmentalists said on Wednesday.
Of oaks from Bashan they have made your oars;With ivory they have inlaid your deck of boxwood from the coastlands of Cyprus.
In Coastland, consumers spend according to the equation: C = 100+0.
Trench, 36, runs the Coastland Christian Fellowship Church from a school for special needs children in Ayr.
Seek out the designer names at the famous Coastland Mall and the trendy shops between 5th and 3rd Avenues.
THE memory of Ben Hogan is so revered over this rugged stretch of Scottish coastland that whoever lifts the Claret Jug today will forever live in his ghostly shadow.
Set in ten acres of heritage coastland with the beach on your doorstep, you'll feel immediately inspired and refreshed by the spectacular scenery and Atlantic air.
All of Sayers' previous four novels have been set in the marshy coastland of South Carolina, in a town called Due East that strangely resembles the Beaufort of the author's birth.
is making an investment of approximately $5 million in a new two-story building with a mezzanine on top, close to the Coastland Center mall, off U.
Foodbank Network Director Adrian Curtis at the Coastland Family Church foodbank in Barry
The output of the Tulu oral tradition is really stunning and PaDdanas (folk narratives) found in Tulunadu-comprising the southern coastland of Karnataka and northern parts of Kerala-could be ranked among the best folk epics of the world.