This zone is where the Juan de Fuca Plate is slowly sliding under (subducting) below the North American Plate. 1. a geological process in which one edge of a crustal plate is forced sideways and downward into the mantle below another plate Familiarity information: SUBDUCTION used as a … Ongoing accretion at a subduction zone, and the obduction of intact ophiolite slabs, are not considered to be collision. We present attenuation relationships for peak ground acceleration and response spectral acceleration for subduction zone interface and intraslab earthquakes of moment magnitude M 5 and greater and for distances of 10 to 500 km. The Cascadia Subduction Zone is a seven hundred mile area that runs along the Pacific Coast from Cape Mendocino, California, to Vancouver Island, Canada (Schulz). Subduction is a kind of geological recycling that occurs at convergent plate boundaries, where two tectonic plates come together due to the motion of the fluid mantle layer of the earth. Meaning of subduction. AP Environmental Science Chapter 3- The Solid Earth. The mean depth below subduction-zone volcanoes to the top of the deep seismic zone (Wadati–Benioff zone) has been given as 124 ± 38 km (ref. They occur at boundaries of crustal plates called subduction zones. Translation for 'subduction zone' in the free English-Dutch dictionary and many other Dutch translations. Subduction zone, oceanic trench area marginal to a continent in which, according to the theory of plate tectonics, older and denser seafloor underthrusts the continental mass, dragging downward into the Earth’s upper mantle the accumulated trench sediments. The new oceanic crust that forms in spreading centers is recycled in these zones. locked zone; for subduction zones, the cou pling coefficient is usually between 0.5 and 1.0 ( Scholz and Campos, 2012 ). ; These conditions exist in the tectonic collisions or from subduction zone accretion. The seismogenic zone down-dip width is defined as the On the surface, the subduction zone is manifested as deep faults stretched along Sakhalin. Tectonic plates are massive pieces of the Earth’s crust that interact with each other. Definition of subduction in the Definitions.net dictionary. Benioff zone. Examples include the Aleutians, the Kuriles, Japan, and the Philippines, all located at the northern and western borders of the Pacific plate. • SUBDUCTION (noun) The noun SUBDUCTION has 1 sense:. Subduction zone definition: a long narrow, often arcuate , zone along which subduction takes place | Meaning, pronunciation, translations and examples Information and translations of subduction zone in the most comprehensive dictionary definitions resource on the web. Benioff zones are dipping, roughly planar zones of increased earthquake activity produced by the interaction of a downgoing oceanic crustal plate with an overriding continental or oceanic plate. Subduction zones represent steady-state convergence. This lesson will discuss the meaning of the term 'subduction zone,' and where they occur in terms of tectonic plate boundaries. Recent studies have shown that this depth ranges from 65–130 km (ref. Synonyms for subduction include subtraction, deduction, reduction, decrease, diminution, debit, deletion, detraction, discount and removal. ; This earthquake was a thrust in a very oblique subduction zone. The Cascadia Subduction Zone is the wonky name for the place where all this mayhem will begin. During arc-continent and continent-continent collision, units deformed in subduction zones may be uplifted and exposed. Meaning of subduction zone. subduction zone zone where the geologic process in which one edge of one crustal plate is forced below the edge of another occurs subduction zone A place on the surface of the Earth where two plates move toward each other, and the oceanic plate plunges beneath the other tectonic plate subduction zone Because subduction involves movement of material downward, it is difficult to observe the products of subduction in the present-day world. A subduction zone on the coast of western North America continues to create the Ancestral Rocky Mountains. Dictionary entry overview: What does subduction mean? The region where subduction takes place is called a subduction zone and usually results in a deep ocean trench such as the "Mariana Trench" in the western Pacific Ocean. What does subduction mean? Subduction zones are convergent boundaries where at least one of the tectonic plates is an oceanic crust. 42) … Please note that Supra-Subduction Zone is not the only meaning of SSZ. A geologic process in which one edge of one crustal plate is forced below the edge of another. Subduction, Latin for "carried under," is a term used for a specific type of plate interaction. Such uplift area is called a volcanic island arc or island arc because it is a curved chain of islands and volcanoes. See more. Regions where this process occurs are known as " subduction zones ". We discuss the relationship between those coupling variations and other segmentation markers, namely, the occurrence of structural complexities along the Chilean coast, the subduction of bathymetric features on the subducting plate, the distribution Definition of subduction zone in the Definitions.net dictionary. In common with subduction initiation, cessation of subduction has been attributed to a variety of mechanisms, including collision with continents or oceanic plateaus, interaction between the subduction zone and spreading ridges and transforms, or within the context of a broader-scale reorganisation of plate motions (e.g. ; Examples are the earthquakes in Sumatra, 2004, all in subduction zones. 5). There may be more than one definition of SSZ, so check it out on our dictionary for all meanings of SSZ one by one. 41) or 108 ± 14 km (ref. Subduction zone earthquakes cause ocean ward displacement of the overriding plate. Subducting oceanic plate The oceanic crust melts as it descends into the lithosphere and upper mantle. The remains of the subduction zone in the form of an ophiolite complex have been identified from geological and geophysical data. Other Meanings of SSZ Besides Supra-Subduction Zone… When the Philippine plate reaches a depth greater than 100km, the water it contains lowers the … The plate boundary contact between two such plates generate very large, shallow subduction zone earthquakes such as the Sumatra 2004 M9.1 event, and the 2011 M9.0 Japan earthquake, and is only active to relatively shallow depths - approximately 60 km. Definition in English: Supra-Subduction Zone . segmented along the Chilean subduction zone. Subduction definition is - the action or process in plate tectonics of the edge of one crustal plate descending below the edge of another. The Philippine tectonic plate (on the right) dives under the Eurasian plate (on the left). It is probable that the Neftegorsk earthquake was a result of activation of this ancient subduction zone. Subduction and mélange. There are 2 main types of subduction zones: Oceanic-oceanic plate boundaries: If the subducting plate subducts beneath an adjacent oceanic plate, an island arc is formed. Subduction definition, an act or instance of subducting; subtraction or withdrawal. In a subduction zone, plate subduction forms a trench and uplift area parallel to the trench and causes igneous activity and earthquakes. Block-diagram showing a cross-section of the subduction zone beneath the Philippines. (noun) A subduction zone is a region of the Earth’s crust where tectonic plates meet. The arc has formed due to subduction along the Cascadia subduction zone. It happens when one lithospheric plate meets another—that is, in convergent zones—and the denser plate sinks down into the mantle. What does subduction mean? What does subduction zone mean? Displacements decrease from the trench to become zero at the backstop, beyond which there is no accumulation of elastic strain during the earthquake cycle. Information and translations of subduction in the most comprehensive dictionary definitions resource on the web. ‘Nevertheless, subduction of Africa beneath Iberia starting in the Late Eocene has been proposed.’ Origin 1970s via French from Latin subductio(n-), from subduct- ‘drawn from below’, from the verb subducere.