sentences:  Cenozoic sediments are unimportant except for volcanic ash and Asian loess deposited adjacent to Japan and carbonate sediment]]s associated with the relatively shallow Caroline Ridge and Caroline plate.Strong seafloor currents are probably responsible for this erosion or non-deposition.The compositions of sediments being subducted beneath the northern and southern parts of the IBM arc are significantly different, because of the Cretaceous off-ridge volcanic succession in the south that is missing in the north.