This paper was greatly improved by the critical reviews of Adrian Cramp, Peir Pufahl, Wonn Soh, and the ODP editors. We thank Geraldine Aron, Raffie Barsamian, Barry Dalkey, Samuel deHaas, and Darrin Arthur for their assistance in performing nearly 1000 grain-size measurements. This research was supported by a JOI/U.S. Science Support Program grant and a Grant-in-Aid for Scientific Research of the Ministry of Education, Science, and Culture of Japan (No. 08458141).