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]

The Izu-Ogasawara Trench lies south of Japan

It stretches from Japan to the northernmost section of Mariana Trench.[2] The Izu-Ogasawara Trench is an extension of the Japan Trench. Here, the Pacific Plate is being subducted beneath the Philippine Sea Plate, creating the Izu Islands and Bonin Islands on the Izu-Bonin-Mariana Arc system.[3]

It is 9,780 metres (32,087 ft) at its deepest.

The xenophyophore Occultammina was first discovered at a depth of 8260 metres in the trench.[4]

See also

References
  1. "Locator map". Expedition to the Mariana forearc. School of Ocean and Earth Science and Technology at the University of Hawaii.
  2. Deep current structure above the Izu-Ogasawara Trench
  3. Crustal structure of the ocean-island arc transition at the mid Izu-Ogasawara (Bonin) arc margin
  4. Tendal, Os; Swinbanks, Dd; Shirayama, Y. (1982-01-01). "A new infaunal xenophyophore (xenophyophorea, protozoa) with notes on its ecology and possible trace fossil analogs". Oceanologica Acta. 5 (3): 325–329. ISSN 0399-1784.

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