The Leg 176 shipboard technical and scientific parties prepped, prodded, described, and photographed the cores, and they made almost all the measurements that form the basis of this paper. I especially thank Ralph Stephen and Andrew Kingdon for pushing the cores through the MST and for consultations at various points on how to evaluate the data listings and get them into my computer. Gerry Iturrino and Sarah Haggas obtained the whole-round core scans. Eiichi Kikawa and Jeff Gee patiently explained the mysteries of magnetic susceptibility. Later, Henry Dick kindly provided his compilation of mineral data, which clarified one of the great complexities of the relationship of magnetic susceptibility to the cores. Maurice Tivey and Jeff Gee both provided careful and thoughtful reviews of the manuscript. Additional comments were made by Editorial Review Board member Dick Von Herzen. This research used samples and/or data provided by the Ocean Drilling Program (ODP). ODP is sponsored by the U.S. National Science Foundation (NSF) and participating countries under management of Joint Oceanographic Institutions (JOI), Inc. The study was supported by a postcruise grant from the United States Science Support Program (USSSP), administered by JOI, Inc.