
1) Geologic process 2) Geological process 3) Subtraction or withdrawal
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https://www.crosswordclues.com/clue/subduction

In geology, subduction is the process that takes place at convergent boundaries by which one tectonic plate moves under another tectonic plate and sinks into the mantle as the plates converge. Regions where this process occurs are known as subduction zones. Rates of subduction are typically centimetres per year, with the average rate of convergenc...
Found on
http://en.wikipedia.org/wiki/Subduction

• (n.) The act of subducting or taking away. • (n.) Arithmetical subtraction.
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http://thinkexist.com/dictionary/meaning/subduction/

(from the article `Earth Sciences`) ...km (about 155–310 mi) or more. This evidence indicated that crustal rocks were carried into the Earth`s interior. The most likely geologic process ... ...environment similar to that of the present southwestern Pacific Ocean. Rocks were accreted onto the ancient African continent, the margin of...
Found on
http://www.britannica.com/eb/a-z/s/177

Credit: U.S. Geological Survey The process describing when one lithospheric plate collides with and is overridden by, or descends under, an adjacent plate. The subduction zone is the place where two lithospheric plates come together, one riding over the other. Most volcanoes on land occur paral...
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http://www.daviddarling.info/encyclopedia/S/subduction.html

subduction. The process of the oceanic lithosphere colliding with and descending beneath the continental lithosphere.
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http://www.encyclo.co.uk/local/21456

The sinking of an oceanic plate edge as a result of convergence with a plate of lesser density. Subduction often causes earthquakes and creates volcano chains.
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http://www.encyclo.co.uk/local/22291
Sub·duc'tion noun [ Latin
subductio .]
1. The act of subducting or taking away.
Bp. Hall. 2. Arithmetical subtraction.
Sir M. Hale. Found on
http://www.encyclo.co.uk/webster/S/221

Subsidence of the leading edge of a lithospheric plate into the mantle.
Found on
http://www.evcforum.net/WebPages/Glossary_Geology.html

A geologic process in which one edge of one crustal plate is forced below the edge of another.
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http://www.scientificpsychic.com/etc/geology-glossary.html

The process of one lithospheric plate descending beneath another.
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http://www.solarviews.com/eng/terms.htm

n. A geologic process in which one edge of one crustal plate is forced below the edge of another; subduct– v.; subduction zone- n. A long narrow area in which subduction is taking place, e.g. the Peru-Chile trench, where the Pacific Plate is being subducted under the South American Plate.
Found on
http://www.ucmp.berkeley.edu/glossary/gloss2geol.html

n. A geologic process in which one edge of one crustal plate is forced below the edge of another; subductâ€` v.; subduction zone- n. A long narrow area in which subduction is taking place, e.g. the Peru-Chile trench, where the Pacific Plate is being subducted under the South American Plate.
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http://www.ucmp.berkeley.edu/glossary/glossary_2.html

subduction The action of subduing or fact of being subdued; subdual, subjection.
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http://www.wordinfo.info/words/index/info/view_unit/2058/2
noun a geological process in which one edge of a crustal plate is forced sideways and downward into the mantle below another plate
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https://www.encyclo.co.uk/local/20974

an act or instance of subducting; subtraction or withdrawal. · the process by which collision of the earth's crustal plates results in one plate's being drawn down or overridden by another, localized along the juncture of two plates.
Found on
https://www.infoplease.com/dictionary/subduction
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