deep-sea trench

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deep-sea trench

or oceanic trench

Any long, narrow, steep-sided depression in the ocean bottom in which maximum oceanic depths (24,000–36,000 ft, or 7,000–11,000 m) occur. The deepest known depression of this kind is the Mariana Trench. Most trenches occur at subduction zones, where one tectonic plate is thrust under another.

deep-sea trench [¦dēp ¦sē ′trench]

(geology)

A long, narrow depression of the deep-sea floor having steep sides and containing the greatest ocean depths; formed by depression, to several kilometers' depth, of the high-velocity crustal layer and the mantle.

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No references found			By dating rock recovered from numerous seafloor locations, researchers in the early 1970s confirmed the basic cycle of plate tectonics: New ocean crust forms at mid-ocean ridges and spreads outward toward deep-sea trench subduction zones. A sea change in ocean drilling: scientists launch a new drill ship ... by Normile, Dennis; Kerr, Richard A. / Oceanus			Deep Space Network Deep Tank deep trades deep underwater muon and neutrino detector deep vein thrombosis deep volar arch deep water deep waterline deep Web deep well deep-casting deep-draw deep-draw mold deep-etch deep-etch printing deep-marine sediments deep-penetration bomb deep-pile fabric Deep-Sea Animals deep-sea basin deep-sea channel Deep-Sea Deposits deep-sea exploration deep-sea plain Deep-Sea Red Clay deep-sea trench Deep-sea Trenches deep-sea vent Deep-Sea Zone deep-seal trap deep-seated deep-space probe deep-submergence rescue vehicle deep-vein thrombosis Deep-Water Pump Deep-Water Seining deep-water wave deep-well pump Deep-Well Pumping Operations deepening deeping deer Deer Creek State Park Deer Flat National Wildlife Refuge Deer Lake State Park Deer Mountain Campground deer mouse Deer Park Deer Raising Deer Stones Deere, John			deep-pink Deep-read deep-rooted deep-rooted deep-rooted deep-rooted deep-rooted belief deep-rootedness deep-rootedness deep-sea Deep-Sea Animals deep-sea basin deep-sea channel Deep-Sea Deposits deep-sea diver Deep-sea diving Deep-sea diving Deep-Sea Drilling Project Deep-sea exploration Deep-sea exploration Deep-sea fan Deep-sea fangly fish Deep-sea fangly fish Deep-Sea Fishing Station Deep-sea lead Deep-sea perch deep-sea plain Deep-Sea Red Clay Deep-sea spiny eel Deep-Sea Submersible deep-sea trench Deep-sea Trenches deep-sea vent Deep-Sea Vents Deep-Sea Vents Deep-Sea Zone deep-seal trap deep-seated deep-seated deep-seated deep-set deep-six deep-six deep-sixed deep-sixed deep-sixes deep-sixes deep-sixing deep-sixing deep-space probe deep-submergence rescue vehicle Deep-tissue massage Deep-tissue massage Deep-tissue massage Deep-Towed Acoustic/Geophysical System DEEP-UV Deep-vein thombosis Deep-vein thombosis Deep-vein thrombosis Deep-vein thrombosis Deep-vein thrombosis

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