Oceanic trench area in which, according to the theory of plate tectonics , the seafloor underthrusts an adjacent plate, dragging the accumulated trench sediments downward into the Earth's upper mantle.
See also deep-sea trench .
Oceanic trench area in which, according to the theory of plate tectonics , the seafloor underthrusts an adjacent plate, dragging the accumulated trench sediments downward into the Earth's upper mantle.
See also deep-sea trench .
Britannica Concise Encyclopedia. Краткая энциклопедия Британика. 2012