deep-sea trench

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Related to Oceanic trench: Oceanic crust, Oceanic plate

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.
References in periodicals archive ?
The compressive deformation resulted in the uplift of both the acretionary prism and the western segment of the Arrayan basin, whose emerged portions were affected by erosion and supplied sediments to the oceanic trench (Fig.
At the end of early Permian the main compressive process stopped in the eastern orogenic front and remained concentrated close to the oceanic trench until the middle Permian, ending before late Permian times.
It is also large over the oceans around islands and oceanic trenches, like the Bering Sea, the Japan seas, the Indonesian seas, the Caribbean Sea, and the ocean around the Mariana Trench.
Located in the "Ring of Fire" arc of volcanoes and oceanic trenches partly encircling the Pacific Basin, the country accounts for about 20 percent of the world's earthquakes of magnitude 6.0 or greater.
A continuous series of oceanic trenches, volcanic arcs, and volcanic belts
The survey set out to answer many of the basic questions about the physical and biological characteristics of the open oceans--indeed Murray coined the term 'oceanography' Depth soundings mapped the shape of the ocean floor, revealing the existence of the Mid-Atlantic Ridge and of oceanic trenches.
Indonesia, the world's largest archipelago nation, is prone to earthquakes because of its location on the so-called Pacific 'Ring of Fire' -volcanic arcs and oceanic trenches partly encircling the Pacific Basin.
New Zealand lies in the seismically active "Ring of Fire", a 40,000-km arc of volcanoes and oceanic trenches that encircles much of the Pacific Ocean.
The team plans to probe previously untapped oceanic trenches to collect mud and sediment samples in the hope that they will uncover new bacteria that could produce novel antibiotics.
One approach is to use digital terrain models (DTM) showing the forms of mountain ranges, oceanic trenches, volcanic ridges and island arcs, and oceanic basins to constrain models of the processes that produced them.
New Zealand lies in the seismically active "Ring of Fire", a 40,000 km arc of volcanoes and oceanic trenches that partly encircles the Pacific Ocean.
Volcanic arcs and oceanic trenches partly encircling the Pacific Basin form the Ring of Fire, a zone of frequent earthquakes and volcanic eruptions.