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 ?
2011: The Steeply Subducting Edge of the Cocos Ridge: Evidence from Receiver Functions Beneath the Northern Talamanca Range, South-Cntral Costa Rica.
It may be assumed that the subducting oceanic crust dipping to the mantle will not contribute to the thickening.
In mature subduction zones, original chemistry of the mantle wedge is progressively blurred by metasomatic fluids from the subducting slab.
Once the diving, or subducting, plate gets about 50 kilometers down, temperatures are warm enough that the brittle crust starts to flow more easily.
Scientists have known for some time that India is subducting under Asia, and have recently begun studying the complexity of this volatile collision zone in greater detail, particularly the fault that separates the two plates, the Main Himalayan Thrust (MHT).
The crust/mantle interface beneath Tibet is anisotropic, and the dipping mantle fabric suggests that the Indian mantle is subducting in a diffuse fashion along some sub-parallel structures (J.
A gradual displacement of events northward and eastward may be due to a tearing in subducting the Caribbean plate, that is slowly propagating to the northeast.
Eight papers offer both an overview and new data in the form of stratigraphy, structure, metamorphism, and magmatism--which covers the geological results of the primarily Neogene collapse characterizing segments of interest, in response to late stage reorganization of the subduction zone--and the rollback and breakoff of segments of the subducting slab.
A long, narrow, curvilinear trench in the ocean floor develops where the subducting plate starts its angled descent into the mantle.
The Japanese, for example, have, for centuries, incorporated earthquake-proof technology in the design of their buildings: their traditional paper-and-wood constructions were entirely appropriate for living on the quaking edge of a great subducting region.
We infer that the primitive arc was associated with a subducting slab that dip ata steeper angle than the present.