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The figure is a schematic diagram depicting a subduction zone. The subduction slab on the right enters the mantle with a varying temperature gradient while importing water in a downward motion. A model of the subducting Farallon slab under North America. In geology, the slab is a significant constituent of subduction zones. [1]
Subduction zone physics: Sinking of the oceanic lithosphere (sediments, crust, mantle), by the contrast of density between the cold and old lithosphere and the hot asthenospheric mantle wedge, is the strongest force (but not the only one) needed to drive plate motion and is the dominant mode of mantle convection. [citation needed]
The direction of the subduction system changes since the break-off of slab creates the space, which is the major parameter of this model. [4] The evolution diagram showing how the subduction reversal initiated by a break-off slab at subducting plate: Brown colour is the less dense continental crusts; White colour is the oceanic crust; 1. Two ...
Structure of the Cascadia subduction zone. The Cascadia subduction zone is a 1,000 km (620 mi) long dipping fault that stretches from Northern Vancouver Island to Cape Mendocino in northern California. It separates the Juan de Fuca and North America plates. New Juan de Fuca plate is created offshore along the Juan de Fuca Ridge.
Subduction zones are areas where one lithospheric plate slides beneath another at a convergent boundary due to lithospheric density differences. These plates dip at an average of 45° but can vary. Subduction zones are often marked by an abundance of earthquakes, the result of internal deformation of the plate, convergence with the opposing ...
A diagram illustrating the interseismic, preseismic, and postseismic periods for a subduction zone earthquake cycle. The over-riding plate bends to accumulate stress during the interseismic period and rebounds back to its previous position to release stress.
Diagram of Wadati–Benioff zone, from the United States Geological Survey Seismicity cross-section, Kuril Islands subduction zone, 15 November 2006, 8.3 M w event marked as star A Wadati–Benioff zone (also Benioff–Wadati zone or Benioff zone or Benioff seismic zone ) is a planar zone of seismicity corresponding with the down-going slab in ...
As the subduction zone and its associated trench pull backward, the overriding plate is stretched, thinning the crust and forming a back-arc basin. In some cases, extension is triggered by the entrance of a buoyant feature in the subduction zone, which locally slows down subduction and induces the subducting plate to rotate adjacent to it.