Subduction zones occur at collision boundaries where at least one of the colliding lithospheric plates contains oceanic crust. In accord with plate tectonic theory, collision boundaries are sites where lithospheric plates move together and the...

oceanic trench area marginal to a continent in which, according to the theory of plate tectonics, older seafloor underthrusts the continental mass, dragging downward into the Earth's upper mantle the accumulated trench sediments. The subduction zone,...

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. &Seealso; deep-sea...

The process whereby one TECTONIC PLATE slides beneath another at the junction where two such plates are moving towards each other. See also:...

In geology, a subduction zone is an area on Earth where two tectonic plates meet and move towards one another, with one sliding underneath the other and moving down into the mantle, at rates typically measured in centimeters per year. An oceanic plate...