This research used samples provided by the Ocean Drilling Program (ODP). ODP is sponsored by the U.S. National Science Foundation (NFSF) and participating countries under management of Joint Oceanographic Institutions (JOI), Inc. The first author thanks Professor Evan Leitch and Associate Professor Greg Skilbeck for advice on the petrological work, Dr. Graziella Caprarelli for confirming mineral identifications by the use of an electron microprobe, and Dr. Tony Allan for advice on carbonate petrology. Freeman Ryan Design is thanked for assistance with the figures and plates. This postcruise work was supported by a grant from the Australian ODP Secretariat. The second author acknowledges the financial support of the UK National Environmental Research Council during the cruise to postcruise work. Constructive reviews were received from Dr. Chris Fergusson and Dr. Moyra Wilson.