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The Tonga–Kermadec Ridge is an oceanic ridge in the south-west Pacific Ocean underlying the Tonga–Kermadec island arc.It is a result of the most linear, fastest converging, and seismically active subduction boundary on Earth, the Kermadec–Tonga subduction zone, and consequently has the highest density of submarine volcanoes.
Pages in category "Subduction zones" The following 52 pages are in this category, out of 52 total. ... Negros Trench; New Britain subduction zone; New Britain Trench ...
Obduction zones occurs when the continental plate is pushed under the oceanic plate, but this is unusual as the relative densities of the tectonic plates favours subduction of the oceanic plate. This causes the oceanic plate to buckle and usually results in a new mid-ocean ridge forming and turning the obduction into subduction.
The Makran Subduction Zone is often split into two segments: the east and west. The Sonne fault divides the two. [3] Though largely much quieter than many other subduction zones, studies reveal that the Makran Trench may be capable of very large earthquakes, even extending into the magnitude 9 range. [4]
Here, the Pacific Plate is being subducted underneath the North American Plate and the rate of subduction changes from west to east from 7.5 to 5.1 cm (3.0 to 2.0 in) per year. [2] The Aleutian subduction zone includes two prominent features, the Aleutian Arc and the Aleutian Trench. The Aleutian Arc was created via volcanic eruptions from ...
The subduction zone is under the eastern part of New Guinea and the islands of New Britain and New Ireland, with associated volcanoes and volcanic seamounts being in the zone, and with the New Britain Trench marking the current subduction boundary. [5] [6] The trench is up to 9,046 m (29,678 ft) deep. [7] To the zone's south east are the San ...
The New Guinea Trench is a trench along the northern coast of New Guinea. It may represent the seafloor expression of an active subduction zone. The trench generally reaches a depth of less than 4,000 m (13,000 ft) because of the subduction of thickened oceanic crust. However in the west, its depth extends to more than 5,000 m (16,000 ft). [1]
Depth of oceanic trenches seems to be controlled by age of the oceanic lithosphere being subducted. [5] Sediment fill in oceanic trenches varies and generally depends on abundance of sediment input from surrounding areas. An oceanic trench, the Mariana Trench, is the deepest point of the ocean at a depth of approximately 11,000 m (36,089 ft).