Philippine Sea Plate
The Philippine Mobile Belt is bounded on the west by the Manila Trench and its associates the Negros Trench and the Cotabato Trench, which subducts the Sunda Plate under the Philippine Mobile Belt. To the east is the Philippine Trench and its northern associate, the East Luzon Trench which subducts Philippine Sea Plate the Philippine Mobile Belt. The continuity of the Philippine-East Luzon Trench is interrupted and displaced by Benham Plateau on the Philippine Sea Plate, which collided and is still colliding with the Sierra Madre of eastern Luzon.