We thank Captain Tom Ribbens, the crew, technicians, and fellow scientists aboard JOIDES Resolution for their dedicated assistance during ODP Leg 190. We thank Nathalie Fagel and an anonymous reviewer for their helpful comments and insights. This research used samples 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 was provided by a Schlanger Ocean Drilling Fellowship to J. Steurer and the U.S. Science Support Program (grant F001281 to M. Underwood). Arpit Ghoting, Anup Bidesi, Nandini Basu, Swati Udas, Eric Grabowski, Marcie Workman, and Burt Thomas assisted with sample preparation.