During the rift stage, the Gondwana continent was split into many parts, which remained in contact with each other. These splits gave rise to basins in which predominantly continental sediments were deposited at relatively high sedimentation rates. During later episodes of extension, sea-floor spreading (drifting) and the development of a passive margin generally followed rifting of continental crust. A few rifts, however, ?failed? and did not progress to the drifting stage.