
A region where the earth's plates collide, with one plate sliding beneath the other. The world's largest earthquakes occur along this type of plate boundary. The Cascadia subduction zone, extending from northern California to the north end of Vancouver Island, is one such area. The subducting ocean plate is about 40 km beneath Victoria, BC, and abo...
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http://earthquakescanada.nrcan.gc.ca/info-gen/glossa-eng.php

The zone of convergence of two tectonic plates, one of which usually overrides the other.
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http://jersey.uoregon.edu/~mstrick/geology/geo_glossary_page.html

The zone of convergence of two tectonic plates, one of which usually overrides the other.
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http://volcano.oregonstate.edu/glossary/1

oceanic trench area marginal to a continent in which, according to the theory of plate tectonics, older seafloor underthrusts the continental mass, ... [11 related articles]
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http://www.britannica.com/eb/a-z/s/177

an area of the sea floor where two tectonic plates are moving toward each other, causing the more dense, or heavier plate to be forced (or subducted) underneath the less dense, or lighter plate.
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http://www.coml.org/edu/glossary/g1.htm

The zone of convergence of two tectonic plates, one of which usually overrides the other.
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http://www.encyclo.co.uk/local/21455

subduction zone. The place where two lithosphere plates come together, one riding over the other. Most volcanoes on land occur parallel to and inland from the boundary between the two plates.
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http://www.encyclo.co.uk/local/21456

An area at a convergent plate boundary where an oceanic plate is being forced down into the mantle b
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http://www.encyclo.co.uk/local/22392

An elongate zone in which one lithospheric plate descends beneath another. A subduction zone is typically marked by an oceanic trench, lines of volcanoes, and crustal deformation associated with mountain building. See also convergent plate boundary.
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http://www.evcforum.net/WebPages/Glossary_Geology.html

Linear area where tectonic subduction takes place.
Found on
http://www.physicalgeography.net/physgeoglos/s.html

A dipping planar zone descending away from a trench and defined by high seismicity, interpreted as the shear zone between a sinking oceanic plate and an overriding plate.
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http://www.scientificpsychic.com/etc/geology-glossary.html

Elongate region in which the sea floor slides beneath a continent or island arc.
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https://www.encyclo.co.uk/local/20127

In plate tectonics, a region where two plates of the Earth's rigid lithosphere collide, and one plate descends below the other into the weaker asthenosphere. Subduction results in the formation of ocean trenches, most of which encircle the Pacific Ocean. Ocean trenches are usually associated with volcanic island arcs and deep-focus earthqua...
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https://www.encyclo.co.uk/local/21221

the region where one lithospheric plate descends beneath another as the two plates are moving towards each other. It is characterized by a line of earthquakes that demarcate the upper edge of the descending plate.
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https://www.encyclo.co.uk/local/21343

A narrow, elongate region in which one lithospheric plate descends relative to another.
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https://www.encyclo.co.uk/local/22327

An elongated region along which a crustal plate descends relative to another crustal block, for example, the descent of the Pacific plate beneath the Andean plate along the Andean trench.
Found on
https://www.encyclo.co.uk/local/23001
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