subduction

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subduction

[səb′dək·shən]
(geology)
The process by which one crustal block descends beneath another, such as the descent of the Pacific plate beneath the Andean plate along the Andean Trench.
References in periodicals archive ?
Due to the controlling effect of depth on the magnitude of the vertical stress, the absolute values reflect the geometry of the subducted slab.
Between about 35 and 12 million years ago, in the middle Miocene, the Pacific plate was subducted under the Tonga Ridge, producing an extensive volcanic suite.
Seismic tomography shows there is a deep high velocity anomaly in the lower mantle beneath SE Asia interpreted as subducted lithosphere but it can be explained just as well by alternative tectonic models as by the indentor model.
Other suites have enriched isotopic patterns consistent with the influence of subducted oceanic sediments on the composition of the magma.
49) Because Greece is positioned at the southern edge of the Eurasian tectonic plate, with the African plate being subducted below, the country is seismically active and the historical record of frequent and often devastating earthquakes reaches back almost three millennia and continues to the present.
Motion along all of these plate-boundary fault systems is mostly horizontal and conservative, so no large areas of the plate are lost or subducted beneath the neighboring plate--nor is significant space generated by opening gaps between the plates.
Our discovery marks an exciting stage in earth science research as it provides the possibility to test the debated issue of whole mantle convection, the largely unconstrained heat flow from the earth's core to the mantle and the fate of the subducted lithosphere with seismic data.
As the Changtang Terrane drifted northwards in the Triassic, the ocean that stretched to the north was being subducted underneath the southern Asian margin.
However, the seafloor bears no obvious trace of these--they would have been subducted into the mantle long ago.
The area is where the Philippine Sea plate is subducted westward under the Eurasian plate on which Japan sits.
The lithosphere is subducted into the mantle causing water and certain elements to rise to the surface through volcanic activity.
In Suruga Bay in Shizuoka Prefecture, crustal strains are building up as the Philippine Sea Plate is subducted under the Eurasian plate on which Japan sits, according to Matsumura.