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. Funding for this research was provided by a JOI/United States Science Support Program grant #186-F001023. I would like to thank Dr. Lisa M. Pratt for providing encouragement, technical and logistic support, and valuable advice during this project. Also, I thank the crew and scientists aboard the JOIDES Resolution for their effort and assistance. Finally, J.C. Latimer and an anonymous reviewer provided valuable comments to an earlier version of this manuscript.