what are oceanic or submarine plateaus? (one line sentence)
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Answer:
It will be found near the island of sea
Answer:
Oceanic plateau, also called Submarine Plateau, large submarine elevation rising sharply at least 200 m (660 feet) above the surrounding deep-sea floor and characterized principally by an extensive, relatively flat or gently tilted summit.
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Explanation:
Oceanic plateau, also called Submarine Plateau, large submarine elevation rising sharply at least 200 m (660 feet) above the surrounding deep-sea floor and characterized principally by an extensive, relatively flat or gently tilted summit. Most oceanic plateaus were named early in the 20th century prior to the invention of sonic sounding, and many of these features have been shown by modern bathymetric data to be portions of the oceanic ridges. Thus, the Albatross Plateau of the eastern equatorial Pacific now is recognized as belonging to the East Pacific Rise and has been shown to possess a much more irregular summit than early data indicated.
Most plateaus are steplike interruptions of the continental slopes and appear to be downwarped or downfaulted blocks of former continental shelves. These marginal plateaus are exemplified by the Blake Plateau off the southeastern United States. This plateau’s flat surface lies between 700 and 1,000 m (2,300 and 3,300 feet) below sea level, is more than 300 km (185 miles) wide, and covers approximately 130,000 square km (50,000 square miles) of seafloor. The crust underlying the plateau, although relatively thin and veneered by flat-lying marine sediments, is otherwise continental in character.
Submarine canyon, any of a class of narrow steep-sided valleys that cut into continental slopes and continental rises of the oceans. Submarine canyons originate either within continental slopes or on a continental shelf. They are rare on continental margins that have extremely steep continental slopes or escarpments. Submarine canyons are so called because they resemble canyons made by rivers on land.
Unlike deep-sea trenches, which are found in areas where one tectonic plate slides beneath another, undersea canyons are found along the slopes of most continental margins. They also occur along the slopes of the Hawaiian Islands and possibly certain other ocean islands. The majority of these V-shaped depressions have steep, rocky walls thousands of metres high. Those of the Grand Bahama Canyon, which are thought to be the highest, rise nearly 5 km (3 miles) from the canyon floor. The walls of the Grand Canyon of the Colorado River, by comparison, measure about 1.6 km (1 mile) high. Most submarine canyons extend only about 48 km (30 miles) or less in length, but a few are more than 320 km (200 miles) long. They usually are many kilometres in width; for instance, the Grand Bahama Canyon measures 37 km (23 miles) at its widest point.
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