| Increasing proximity to a subduction zone during plate convergence is indicated by the appearance of felsic tuff. |
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| What remains unclear is whether the rocks formed in an open ocean or a marginal back-arc basin associated with a subduction zone. |
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| The most widely accepted view is that of an accretionary prism developed above an active subduction zone. |
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| The tensional stresses in the uplift can be relaxed by, for example, underthrusting in a subduction zone, or contraction in surrounding regions. |
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| Only the upper 4 km of this sequence is accreting at the current subduction zone. |
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| The subduction zone beneath northeast Honshu is marked at the surface by the Japan deep-sea trench and associated island arc. |
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| A detailed discussion of the hazard associated with great subduction zone earthquakes is beyond the scope of this article. |
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| Overthrusting, volcanism, and plutonic igneous intrusion were identified as originating above the subduction zone where one plate is forced beneath the edge of its neighbour. |
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| Free slip in the latter zone may be a consequence of the stable sliding clay minerals that are common in the region of subduction zone faults. |
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| The most conspicuous outboard structure is the accretionary wedge that lies just continentward of the ocean trench, the bathymetric manifestation of the subduction zone. |
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| Upon its arrival in the subduction zone, this relatively buoyant continental crust does not subduct to any appreciable degree. |
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| Schematic block diagram showing major features of a subduction zone and spreading ridge, such as are found in southwestern British Columbia. |
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| The Cascadia subduction zone runs from Cape Mendocino, California, to Vancouver Island, Canada. |
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| The subduction zone runs for seven hundred miles along the western coast of our continent. |
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| In a subduction zone, one piece of crust is forced down into the mantle below the overriding crust. |
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| Like all earthquakes, great subduction zone events are complex when considered in detail. |
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| Each ETS episode adds a small amount of stress on the locked portion of the subduction zone. |
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| Overall the temporal progradation of nappe emplacement and high-pressure metamorphism towards the south mimics the southward retreat of the Hellenic subduction zone. |
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| Yet from northern California into the Pacific Northwest is a subduction zone, a convergent boundary where the oceanic plate dives beneath the continental plate of North America. |
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| Where the asthenosphere sinks back down to deeper levels, it drags the overlying plate down with it, creating a convergent plate boundary called a subduction zone. |
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| Early results from these surveys indicated shear-strain rates ranging from 0.05 to 0.23 ppm per year within the networks, results consistent with models of a locked subduction zone. |
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| Large, shallow earthquakes on subduction zone interfaces are the largest types of earthquakes. |
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| The elements of an active oceanic basin often include the oceanic trench associated with a subduction zone. |
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| This tectonic plate converges with the Cocos, Nazca, and North American plates to form the Middle America Trench, a major subduction zone. |
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| To the north lies the Cascadia subduction zone, where the Gorda Plate is being subducted under the margin of the North American plate. |
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| This temperature corresponds well with that estimated for the maximum depth of earthquakes in many continental areas, including the crustal earthquakes landward of the Cascadia subduction zone. |
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| Since Central America is a major subduction zone, Nicaragua hosts most of the Central American Volcanic Arc. |
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| Groundshaking, landslides, liquefaction, tsunamis, fires, hazardous material spills, and building damage are some of the hazards we face from a Cascadia subduction zone earthquake. |
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| An example of a volcanic arc having both island and continental arc sections is found behind the Aleutian Trench subduction zone in Alaska. |
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| Intraslab earthquakes occur in the subducting oceanic slab and shallow crustal earthquakes occur in the North America plate above the subduction zone. |
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| The place where they meet is the Cascadia subduction zone. |
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| This subduction zone explains the presence of active volcanoes over the southeastern part of the Caribbean Sea. |
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| Here, the Nazca plate plunges beneath the South American plate, forming a subduction zone. |
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| The new evidence for giant subduction zone events results in hazard estimates that are similar to those for regions well known for very large earthquakes such as California and Japan. |
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| Water is carried mantle by deep sea fault zones which penetrate the oceanic plate as it bends into the subduction zone. |
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| However, since ETS episodes of various sizes occur at different times all up and down the full length of the Cascadia subduction zone, we cannot yet say which ETS event will be the likely trigger. |
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| Subduction: The sinking of an oceanic plate beneath an overriding, usually continental, plate, which gives rise to a subduction zone, a deep-sea trench and active volcanoes. |
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| Seismologists do not rule out the potential of the earthquake striking Oman's eastern coast from the Makran subduction zone. |
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| The location, depth and mechanism of the earthquake are consistent with the event occurring on this subduction zone interface. |
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| Temperature increases also may contribute to the melting of lithosphere dragged down in a subduction zone. |
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| Ongoing accretion at a subduction zone, and the obduction of intact ophiolite slabs, are not considered to be collision. |
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| A subduction zone on the coast of western North America continues to create the Ancestral Rocky Mountains. |
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| The weakness of the asthenosphere allows the tectonic plates to move easily towards a subduction zone. |
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| The proposed land-based subductive waste disposal method disposes of waste in a subduction zone accessed from land, and therefore is not prohibited by international agreement. |
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| Lithosphere on the oceanward side of an oceanic trench at a subduction zone will curve upwards due to the elastic properties of the Earth's crust. |
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| The eastern boundary is a subduction zone, the Lesser Antilles subduction zone, where oceanic crust of the South American Plate is being subducted under the Caribbean Plate. |
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| This volcanic arc was formed above a subduction zone where the oceanic lithosphere of the Iapetus Ocean subducted southward under other oceanic lithosphere. |
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| The subducting plate in a subduction zone is normally oceanic crust, and moves beneath the other plate, which can be made of either oceanic or continental crust. |
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| Outer rise earthquakes occur when normal faults oceanward of the subduction zone are activated by flexture of the plate as it bends into the subduction zone. |
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| Sylvester points to the Cascadia subduction zone, a plate boundary that stretches from Vancouver to Northern California, as the cause of these threats. |
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| This material is then carried down into the subduction zone. |
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| Fluids escaping from the shallowest parts of a subduction zone may also escape along the plate boundary but have rarely been observed draining along the trench axis. |
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| The new earthquake devices were installed under the ocean on the Hikurangi Subduction Zone. |
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| The Cascadia Subduction Zone is the wonky name for the place where all this mayhem will begin. |
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| The new earthquake devices will be installed under the ocean on the Hikurangi Subduction Zone within the week. |
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