We thank all participants of ODP Leg 175, Captain Anthony Ribbens and the crew of the JOIDES Resolution, and ODP personnel at the Bremen Core Repository for their cooperation in making this work possible. We thank Dr. N. Ishikawa at Kyoto University for hysteresis measurements. All samples were provided by ODP. This work was supported in part by grants from the Joint Oceanographic Institutions/U.S. Science Support Program (JOI/USSSP; 175-F000738 and 175-F000826).