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 gratefully acknowledge JOI for JOI/USSAC (U.S. Science Advisory Committee) grants to R. Dunbar, K. Theissen, and A. Cooper along with a Schlanger Ocean Drilling Program Fellowship to K. Theissen that provided funding for this work. We thank David Mucciarone for assistance with data collection and Harry Rowe for comments that improved this manuscript.