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. Eve Arnold was supported by a grant from the Swedish Natural Science Research Council for this research. This study benefited from the kind assistance of the ODP staff and SEDCO crew aboard the JOIDES Resolution. Ms. Marianne Ahlbom and Ms. Birgitta Boström assisted in the processing of the sediments. Stig-Arne Danielsson kept the X-ray diffractometer alive with heroic effort. I thank these individuals for their contributions.