At the point when a oceanic plate crashes into a continental
plate the crust shaping the oceanic plate bents and get pulled under the
continental crust. This is on account of the rocks that frame the oceanic crusts
are denser and more slender than the rocks that shape the continental crust. The
procedure by which the oceanic crust is pulled under the continental crust is
called subduction and the zone at which this happens at the plate boundaries is
known as the subduction zone. At the subduction zone where the oceanic crust
sinks underneath the continental crust, a profound oceanic trench or valley is
made.
Continents rest on massive slabs of rock called tectonic plates. The plates are always moving and interacting in a process called plate tectonics. As the seafloor grows wider, the continents on opposite sides of the ridge move away from each other.
