This research used samples and 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. Funding for this research was provided JOI-USSAC (United States Science Advisory Committee), and participating national funding agencies. We thank John Barron and Alan Cooper for constructive reviews; however, all errors of commission or omission are our own.