Search results
Results From The WOW.Com Content Network
Oceanic crust is formed at an oceanic ridge, while the lithosphere is subducted back into the asthenosphere at trenches. Oceanic trenches are prominent, long, narrow topographic depressions of the ocean floor. They are typically 50 to 100 kilometers (30 to 60 mi) wide and 3 to 4 km (1.9 to 2.5 mi) below the level of the surrounding oceanic ...
The Mariana Trench is the deepest known submarine trench, and the deepest location in the Earth's crust itself. [38] It is a subduction zone where the Pacific Plate is being subducted under the Mariana Plate. [3] At the deepest point, the trench is nearly 11,000 m deep (almost 36,000 feet).
The Mariana Trench is an oceanic trench located in the western Pacific Ocean, about 200 kilometres (124 mi) east of the Mariana Islands; it is the deepest oceanic trench on Earth. It is crescent-shaped and measures about 2,550 km (1,580 mi) in length and 69 km (43 mi) in width.
On the ocean side of the complex, where the subducting plate first approaches the subduction zone, there is often an outer trench high or outer trench swell. Here the plate shallows slightly before plunging downwards, as a consequence of the rigidity of the plate. [18] The point where the slab begins to plunge downwards is marked by an oceanic ...
Kermadec Trench: Pacific Ocean 10,047 32,963 6.24 6 Izu–Ogasawara Trench: Pacific Ocean 9,810 32,087 6.08 7 Japan Trench: Pacific Ocean 9,000 29,527 5.59 8 Puerto Rico Trench: Atlantic Ocean 8,605 28,232 5.35 9 Yap Trench: Pacific Ocean 8,527 27,976 5.30 10 Richards Deep: Peru–Chile Trench, Pacific Ocean 8,065 26,456 5.01 11 Diamantina Deep
Continental shelves appear mostly by a depth of 140 meters, mid-ocean ridges by 3000 meters, and oceanic trenches at depths beyond 6000 meters. A seafloor map captured by NASA Bathymetry ( / b ə ˈ θ ɪ m ə t r i / ; from Ancient Greek βαθύς ( bathús ) 'deep' and μέτρον ( métron ) 'measure') [ 1 ] [ 2 ] is the study of ...
Others, such as rift valleys or oceanic trenches, are created by geological movement of tectonic plates. Some oceanic trenches include the Mariana Trench and the Aleutian Trench. [2] [3] The former geoform is relatively deep (approximately 10 kilometres (6.2 mi)), linear and narrow, and is formed by plate subduction when plates converge. [4]
Between 30 and 17 Mya, the old age of the subducting Pacific Ocean floor (110-130 Ma) resulted in a very fast trench migration and new back-arc basins opening behind the trenches. [12] The ocean floor of the Pacific Ocean is composed of nine oceanic tectonic plates, all located in the southeast where the East Pacific Rise separates the Pacific ...