We thank Captain Tom Ribbens, the crew, technicians, and fellow scientists aboard JOIDES Resolution for their dedicated assistance during ODP Leg 190. We also thank an anonymous reviewer for his helpful suggestions. Ron Sammons and Eric Grabowski assisted in the laboratory. This research used samples provided by the Ocean Drilling Program, which is sponsored by the U.S. National Science Foundation and participating countries under management of Joint Oceanographic Institutions, 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).