A major example of this plate movement ... destructive boundary. They form where two continental plates are forced together by the convection currents in the upper mantle. At collision zones ...

subduction zones may themselves be transformed to other types of plate boundary. For example, when India collided with Asia, an active subduction zone was transformed into a collision that formed ...

The tiny Juan de Fuca plate is largely responsible for the volcanoes ... A mid-ocean ridge would then mark the boundary between the plates. Mountains and a rift can be seen along the San Andreas ...