We thank the highly capable drilling operations team, the roughnecks, and the technicians who sailed on Leg 198 for their outstanding support. We are very grateful to all of the scientists who sailed with us for their hard work onboard ship and their subsequent productivity. We thank Mitch Lyle and Larry Peterson for their constructive reviews. This research used samples and data provided by the Ocean Drilling Program (ODP). ODP is funded by the U.S. National Science Foundation (NSF) and participating countries under management of Joint Oceanographic Institutions (JOI), Inc. Funding for this research was provided by the U.S. Science Support Program, administered by JOI and by NSF EAR-0120727.