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A geologic process in which one edge of one crustal plate is forced below the edge of another.

[French, from Latin subductus, past participle of subdūcere, to draw away from below : sub-, sub- + dūcere, to lead; see deuk- in Indo-European roots.]

sub·duct′ v.
sub·duc′tal (-təl) adj.


1. (Physiology) the act of subducting, esp of turning the eye downwards
2. (Geological Science) geology the process of one tectonic plate sliding under another, resulting in tensions and faulting in the earth's crust, with earthquakes and volcanic eruptions


(səbˈdʌk ʃən)

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 (subduc′tion zone`) of two plates.
[1965–70; < French subduction (1951); see subduct, -ion]


The sinking of one lithospheric plate’s leading edge below another lithospheric plate. This occurs below deep ocean trenches.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.subduction - a geological process in which one edge of a crustal plate is forced sideways and downward into the mantle below another plate
geologic process, geological process - (geology) a natural process whereby geological features are modified
References in classic literature ?
Or Nature faild in mee, and left some part Not proof enough such Object to sustain, Or from my side subducting, took perhaps More then enough; at least on her bestow'd Too much of Ornament, in outward shew Elaborate, of inward less exact.
It's also a subducting plate, diving beneath the North American plate.
Slab pull: Relatively cool and dense oceanic plates (slabs) have negative buoyancy after subducting at ocean trenches and sink into the ductile, less dense asthenosphere, pulling the rest of the tectonic plate along behind it.
15 in Earth and Planetary Science Letters, describes how sediment moving under or subducting beneath tectonic plates could regulate the movement of the plates and may even play a role in the rapid rise of mountain ranges and growth of continental crust.
Along this margin Jacob and Quittmeyer 1979 also recognized the presence of the Arabian Plate margin subducting just south of Kharan Fore Arc Basin.
The entire archipelago is surrounded by subducting plates as manifested by the trenches that are related to volcano formation, the Phivolcs, an agency of the Department of Science and Technology, said in its official web site.
At the earliest, Adakite refers to the intermediate-acidic igneous rock with unique geochemical characteristics, which is formed by young subducting oceanic crust melting under eclogite facies condition.
The Cascadia Subduction Zone (CSZ) is the primary regional fault system in the Pacific Northwest and was created by the oceanic "Juan de Fuca Plate" subducting beneath the continental "North American Plate." The subduction is occurring in the coastal region between Vancouver Island, British Columbia, Canada and the Mendocino Triple Junction in northern California.
Note that we live on extraordinarily unstable geological formations on which we are very highly likely to experience large abrupt movements - earthquakes - as the extreme stresses in the colliding/subducting Pacific Northwest geologic formations are released (for example, the Juan de Fuca plate is subducting under the North American plate).
But as we know that tectonically Pakistan lies in an active collision zone and Indo-Pakistan plate is subducting under Island Arc along Main Mantle Thrust which is further subducting under Eurasian plate.