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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. 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.

  4. Marine geology - Wikipedia

    en.wikipedia.org/wiki/Marine_geology

    At the deepest point, the trench is nearly 11,000 m deep (almost 36,000 feet). [38] [3] This is further below sea level than Mount Everest is above sea level, by over 2 kilometers. Volcanic arcs and oceanic trenches partly encircling the Pacific Basin form the so-called Pacific Ring of fire, a zone of frequent earthquakes and volcanic eruptions.

  5. Hadal zone - Wikipedia

    en.wikipedia.org/wiki/Hadal_zone

    The name refers to Hades, the ancient Greek god of the underworld. [6] About 94% of the hadal zone is found in subduction trenches. [7] Depths in excess of 6,000 m (20,000 ft) are generally in ocean trenches, but there are also trenches at shallower depths. These shallower trenches lack the distinct shift in lifeforms and are therefore not hadal.

  6. Izu–Ogasawara Trench - Wikipedia

    en.wikipedia.org/wiki/Izu–Ogasawara_Trench

    The Izu–Ogasawara Trench (伊豆・小笠原海溝, Izu–Ogasawara Kaikō), also known as Izu–Bonin Trench, is an oceanic trench in the western Pacific Ocean, consisting of the Izu Trench (at the north) and the Bonin Trench (at the south, west of the Ogasawara Plateau). [1] It stretches from Japan to the northernmost section of Mariana ...

  7. Kermadec Trench - Wikipedia

    en.wikipedia.org/wiki/Kermadec_Trench

    The Kermadec Trench is one of Earth's deepest oceanic trenches, reaching a depth of 10,047 metres (32,963 ft). [3] Formed by the subduction of the Pacific Plate under the Indo-Australian Plate, it runs parallel with and to the east of the Kermadec Ridge and island arc. The Tonga Trench marks the continuation of subduction to the north.

  8. Aleutian Trench - Wikipedia

    en.wikipedia.org/wiki/Aleutian_Trench

    The Aleutian Trench (or Aleutian Trough) [1] is an oceanic trench along a convergent plate boundary which runs along the southern coastline of Alaska and the Aleutian islands. The trench extends for 3,400 kilometres (2,100 mi) from a triple junction in the west with the Ulakhan Fault and the northern end of the Kuril–Kamchatka Trench , to a ...

  9. Hikurangi Trough - Wikipedia

    en.wikipedia.org/wiki/Hikurangi_Trough

    Although shallower than the trenches north of it, the Hikurangi Trough reaches depths of 3,000 metres (9,800 feet) as close as 80 kilometres (50 miles) from shore. [2] The southern trough structure is 6–10 km (3.7–6.2 mi) wide off the coast of northern Canterbury with an initial local depth of about 2,000 m (6,600 ft), [3] and towards its northern portions it has structures more like those ...