West Philippine Basin (also known as the West Philippine Sea Basin), formed during the early Oligocene epoch, is the oceanic crust located underneath the western part of the Philippine Sea; and is deeper and older than the eastern basins and has crustal heat-flow values approaching that of old oceanic crust.
West Philippine Basin (also known as the West Philippine Sea Basin), formed during the early Oligocene epoch, is the oceanic crust located underneath the western part of the Philippine Sea; and is deeper and older than the eastern basins and has crustal heat-flow values approaching that of old oceanic crust.