We thank the reviewers (David Mallinson and Sara Harris) and ODP editor (Heather Nevill) for their assistance. 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/USSSP (United States Science Support Program) grant to G. Acton.