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Red line is the Sagami Trough. The Sagami Trough (相模トラフ, Sagami Torafu) also Sagami Trench, Sagami Megathrust, or Sagami Subduction Zone is a 340-kilometre (210 mi)long trough, which is the surface expression of the convergent plate boundary where the Philippine Sea plate is being subducted under the Okhotsk microplate.
In plate tectonics, the Nankai Trough marks a subduction zone that is caused by subduction of the Philippine Sea plate beneath Japan, part of the Eurasian plate (Kanda et al., 2004). This plate boundary would be an oceanic trench except for a high flux of sediments that fills the trench.
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]
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]
The trench is also a part of the Chile triple junction, an unusual junction that consists of a mid-oceanic ridge and the Chile Rise being subducted under the South American plate at the Peru–Chile Trench. Two seamount ridges within the Nazca plate enter the subduction zone along this trench: the Nazca Ridge and the Juan Fernández Ridge.
Subduction zones are marked by oceanic trenches. The descending end of the oceanic plate melts and creates pressure in the mantle , causing volcanoes to form. Back-arc basins can form from extension in the overriding plate, in response to the displacement of the subducting slab at some oceanic trenches .
The Middle America Trench is a major subduction zone, an oceanic trench in the eastern Pacific Ocean off the southwestern coast of Middle America, stretching from central Mexico to Costa Rica. The trench is 1,700 miles (2,750 km) long and is 21,880 feet (6,669 m) at its deepest point.
The war would be won by the side that was able to commit the last reserves to the Western Front. Trench warfare prevailed on the Western Front until the Germans launched their Spring Offensive on 21 March 1918. [25] Trench warfare also took place on other fronts, including in Italy and at Gallipoli. Armies were also limited by logistics.