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subduction
(redirected from subduct)

   Also found in: Dictionary/thesaurus, Medical, Legal, Wikipedia 0.01 sec.
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.


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What goes down must come up: Slabs that subduct and mix into the lower mantle are balanced by mantle plumes, rich in helium-3, which rise from the lower mantle to the Earth's surface without mixing significantly as they traverse the upper mantle," he added.
Another frightening unknown involves "asperities" - parts of the plates that don't subduct evenly.
 
 
 
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