SOLAR SYSTEM

Detailed explanation-1: -At deep-ocean trenches, subduction allows part of the ocean floor to sink back into mantle, over tens of millions of years.

Detailed explanation-2: -Where two tectonic plates converge, if one or both of the plates is oceanic lithosphere, a subduction zone will form. An oceanic plate will sink back into the mantle.

Detailed explanation-3: -Trenches are long, narrow depressions on the seafloor that form at the boundary of tectonic plates where one plate is pushed, or subducts, beneath another.

Detailed explanation-4: -Plate tectonics and the ocean floor Bathymetry, the shape of the ocean floor, is largely a result of a process called plate tectonics.

Detailed explanation-5: -The seafloor is destroyed in subduction zones, where oceanic crust slides under continents and sinks back into the mantle, and is reforged at seafloor spreading ridges.