We would like to express our thanks to the tireless and resourceful technical staff of the JOIDES Resolution, and particularly to our Leg 164 paleomagnetic technician, Margaret Hastedt. Margaret's mastery of the instrumentation in the laboratory, unfailing good humor, and supply of Madman comics made her a pleasure to work with. Shore-based analysis was conducted at the La Trobe University Palaeo/Archaeo/Litho-Magnetic laboratory (the "PALM" lab), as part of a project funded by the Australian Research Council. Y.H. thanks the Australian Academy of Science for its support as part of an exchange program with the Japan Society for the Promotion of Science. We would also like to thank the two reviewers, Bill Owen and Joe Stoner, for their constructive comments.