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 Institution (JOI), Inc. Financial support for various parts of this research was provided by a grant to X. Zhao from the U.S. Science Support Program of the JOI and NSF grants EAR 443549-22178 and 443747-22035. Funding was also provided by the Center for the Study of Imaging and Dynamics of the Earth, Institute of Geophysics and Planetary Physics at the University of California Santa Cruz, contribution number 449. We would like to thank S. Brachfeld, P. Quilty, and an anonymous reviewer for insightful reviews and constructive suggestions on the original manuscript as well as Millard F. Coffin of the volume editorial board for his help with Figure F1. Thanks to Peter and Janna Riisager for helping with different figures. X. Zhao also wishes to express his appreciation to the shipboard scientists, the ODP marine technicians, and the crew of the JOIDES Resolution for their help during Leg 183. We also wish to express our appreciation to the shore-based ODP staff for all of their precruise and postcruise efforts.