We thank Stuart Hall for allowing us to use his paleomagnetic laboratory and Gary Acton for making hysteresis measurements. Reviews by Gary Acton and Mike Fuller improved and clarified the manuscript. 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. Funding for this research was provided by the U.S. Science Support Program (USSSP).