We thank the captain and the crew of the JOIDES Resolution, both co-chief scientists, W.H. Berger and G. Wefer, ODP Staff Scientist C. Richter, and the entire Shipboard Scientific Party of Leg 175 for their great assistance at sea. This research was supported by a postcruise JOI/USSSP grant. Helpful suggestions were made by Dr. Mike Garcia, Denise J. Hills, Stephen J. Leslie, and Tara M. Hicks. Reviews by Lona Dearmont and Jens Grützner greatly enhanced both editorial style and scientific content.