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  2. Oceanic trench - Wikipedia

    en.wikipedia.org/wiki/Oceanic_trench

    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 ...

  3. Hadal zone - Wikipedia

    en.wikipedia.org/wiki/Hadal_zone

    The hadal zone, also known as the hadopelagic zone, is the deepest region of the ocean, lying within oceanic trenches.The hadal zone ranges from around 6 to 11 km (3.7 to 6.8 mi; 20,000 to 36,000 ft) below sea level, and exists in long, narrow, topographic V-shaped depressions.

  4. Oceanic zone - Wikipedia

    en.wikipedia.org/wiki/Oceanic_zone

    It is the region of open sea beyond the edge of the continental shelf and includes 65% of the ocean's completely open water. The oceanic zone has a wide array of undersea terrain, including trenches that are often deeper than Mount Everest is tall, as well as deep-sea volcanoes and basins. While it is often difficult for life to sustain itself ...

  5. Benthic zone - Wikipedia

    en.wikipedia.org/wiki/Benthic_zone

    The ocean floor is not all flat but has submarine ridges and deep ocean trenches known as the hadal zone. [6] For comparison, the pelagic zone is the descriptive term for the ecological region above the benthos, including the water column up to the surface.

  6. Category:Oceanic trenches - Wikipedia

    en.wikipedia.org/wiki/Category:Oceanic_trenches

    Oceanic trenches — the deepest parts of the ocean floor, typically formed when one tectonic plate slides under another. Geology portal; Subcategories.

  7. Mariana Trench - Wikipedia

    en.wikipedia.org/wiki/Mariana_Trench

    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.

  8. World’s rarest whale may have washed up on New ... - AOL

    www.aol.com/news/world-rarest-whale-may-washed...

    Spade-toothed whales are the world’s rarest, with no live sightings ever recorded. No one knows how many there are, what they eat, or even where they live in the vast expanse of the southern ...

  9. Subduction - Wikipedia

    en.wikipedia.org/wiki/Subduction

    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 ...