deep-sea channel

deep-sea channel

[¦dēp ¦sē ′chan·əl]
(geology)
A trough-shaped valley of low relief beyond the continental rise on the deep-sea floor. Also known as mid-ocean canyon.
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The research found that a powerful cascade of Mediterranean water spilling into the Atlantic was scouring the rocky seafloor, carving deep-sea channels and building up mountains of mud.