This research used data provided by the Ocean Drilling Program (ODP). The ODP is sponsored by the U.S. National Science Foundation (NSF) and participating countries under management of Joint Oceanographic Institutions (JOI), Inc. Harold Tobin (LDEO Logging Scientist) supervised shipboard data acquisition and quality control during ODP Leg 190. Trevor Williams and Cristina Broglia (LDEO Borehole Research) prepared the DSI data for postcruise work. Jeff Williams and Marek Kozak (SuperSonic Geophysical) provided software to process these data and ran the models shown in Figure F4. Kazuko Nagao assisted with figure preparation for the manuscript. The efforts of these collaborators and the crew and staff of the JOIDES Resolution during Leg 190 are greatly appreciated. The U.S. Science Support Program provided funding for this research.