The site survey cruise was funded by the Australian Geological Survey Organization (AGSO) with chief scientist Alexandra Isern. This research used samples 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 would like to thank Roger Rütti for help with electron microprobe analyses, Tina van de Flierdt for AMS analysis, Heinz Furrer for helpful discussions, and Frowin Pirovino for preparing the thin sections.