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. We would like to thank JOI for funding for this research via the U.S. Science Support Program. The authors also thank Kevin MacKillop, Kevin Brown, and one anonymous reviewer who provided important suggestions to this manuscript.