(redirected from Subduction zones)
Also found in: Thesaurus, Legal, Encyclopedia.
Related to Subduction zones: Tectonic plates


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 periodicals archive ?
Machine-learning research published in two related papers today in Nature Geosciences reports the detection of seismic signals accurately predicting the Cascadia fault's slow slippage, a type of failure observed to precede large earthquakes in other subduction zones.
Sediment entering subduction zones has long been known to influence geological activity such as the frequency of earthquakes, but until now it was thought to have little influence on continental movement.
"People knew that subduction zones could bring down water, but they didn't know how much water," said lead author Chen Cai, from the Washington University in St.
Earthquakes occurring at a depth of less than 70km are classified as 'shallow-focus' earthquakes and are found within the earth's outer crustal layer, while 'deep focus' earthquakes occur within the deeper subduction zones of the earth.
Geology and Tectonics of Subduction Zones: A Tribute to Gaku Kimura
Currently active subduction zones can be found in many parts of the world, including western South America, the NW Pacific and southeast Asia.
Subduction zones are the parts of the Earth where one slab of the crust is slowly sliding under another.
The geometry of faults at subduction zones - regions of Earth's crust where two tectonic plates meet - plays a key role in determining the intensity of earthquakes, ( a new study has revealed.
& CHERY, J., 1997: Quantification of Interplate Coupling in Subduction Zones and Forearc Topography.- Geophys.
"Here, the Nazca plate plunges beneath the South American plate, forming a subduction zone. Active subduction zones are some of the most likely plate interfaces to generate quakes of catastrophic magnitude and also pose the greatest risk of triggering tsunamigenic tectonic events," according to Dr.
The team's 3D models suggest a likely answer to a question that has long plagued geologists: why do long, curving mountain chains form along some subduction zones - where two tectonic plates collide, pushing one down into the mantle?
A similar type of clay is present in other subduction zones in the northwest Pacific, suggesting that they may also be capable of generating huge earthquakes.