We thank the crew of the JOIDES Resolution. Particular thanks to Johanna Suhonen for running the generator-injector gun and Schlumberger field engineers Kerry Swain and Herbert Leyton for running the gun triggering and data acquisition system. Matt Arsenault assisted with postcruise data processing. Ralph Stephen and Greg Moore provided helpful reviews. 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.