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Atlantic Ocean, human body of salt water covering roughly one-fifth of earth’s surface and separating the continent of Europe and Africa come the eastern from those that North and also South America come the west. The ocean’s name, derived from Greek mythology, way the “Sea of Atlas.” it is second in dimension to the Pacific Ocean.
Rocky shore of Labrador, Canada, ~ above the Labrador Sea, one embayment that the northwestern Atlantic Ocean.
The Atlantic is, typically speaking, S-shaped and also narrow in relation to that length. The area the the Atlantic without its dependence seas is about 31,568,000 square mile (81,760,000 square km), and also with castle its area is around 32,870,000 square mile (85,133,000 square km). It has actually an typical depth (with its seas) the 11,962 feet (3,646 metres) and also a best depth the 27,493 feet (8,380 metres) in the Puerto Rico Trench, north of the island of Puerto Rico.
Elements of the continent margin
Elements that the continent margin.
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As the continents room approached and also the rugged Mid-Atlantic Ridge is left behind, one abyssal plain very first is encountered, followed by the smooth, undulating surface of the continent rise. These large embankments, i m sorry lie at depth of some 8,000 to 15,000 feet (2,400 to 4,500 metres) at the foot of continents, reach an ext than 300 mile (500 km) in broad off northwestern Africa, Angola, Argentina, and also the east Seaboard that the unified States. In other areas they space exceedingly narrow. Countless years the weathering, erosion, and also riverine sediment deposition have added to developing the sloping continent rises that room characteristic that the Atlantic basin. The is beneath these slopes—in accumulations 10,000 come 50,000 feet (3,000 to 15,000 metres) thick—that some of the biggest potential reserves on planet of petroleum, herbal gas, and coal room found.
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The Lesser Antilles and the south Sandwich Islands form large unstable island arcs, where the greatest depths that the Atlantic are found in steep-sided, small gashes the drop to more than 25,000 feet (7,600 metres) listed below sea level and an ext than 10,000 feet (3,000 metres) listed below the floors of adjacent basins. Depths higher than 13,000 feet (4,000 metres) occur in the Caribbean basin, i m sorry has plenty of shallow and also several deep relations with the open ocean, and also in a few parts that the Mediterranean Sea, which communicates with the Atlantic just through the Strait that Gibraltar. The strait is about 8 mile (13 km) wide at the narrowest point, and also the best depth on its sill (submarine ridge in between basins) is just a little more than 1,000 feet (300 metres). The partial isolation the the large seas surrounding to the Mediterranean has actually a profound effect on the problems in the seas themselves and in the open ocean.