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Deep-sea Trenches

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Trenches, Deep-sea 

one of the most characteristic elements of the relief of the transitional zone between a continent and the ocean, consisting in a long, narrow lowering in the ocean floor to a depth of over 6,000 m. Deep-sea trenches are usually located on the outer (ocean) side of the mountain ranges of the island arcs. Geologically they represent contemporary geosynclinal structures. The deepest trenches, such as the Marianas Trench, reaching a depth of 11,022 m, are found in the Pacific Ocean.



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The next stage for the team is to quantify their results and work out exactly how much more carbon is stored in deep-sea trenches compared with other parts of the sea, and how much carbon turnover by bacteria is being carried out.
Scientists today recognize distinct assemblages of animal species in six major seafloor regions (colored dots) along the system of volcanic mountains and deep-sea trenches that form the borders of Earth's tectonic plates.
 
 
 
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