 The Pasig River has been a factor that contributes to the ability of manila to sustain life and habitation.A large part of the Cavite area, which was part of the submarine ridge of the ancient Taal Volcano became uplifted and raised within a differential displacement.This occurred near the Tagaytay ridge taking advantage of the southward projection of the Marikina fault line, and the crustal movements include areas as far as north as Parañaque.