This research used samples and data provided by the Ocean Drilling Program (ODP). The ODP is sponsored by the U.S.National Science Foundation (NSF) and participating countries under management of Joint Oceanographic Institutions (JOI), Inc. Geoscience Australia provided sample preparation. Dr. P.E. O'Brien of that institution provided much information on stratigraphy and the geological setting of the material. Dr. E.M. Truswell acknowledges facilities provided by the Department of Geology, Australian National University, during the tenure of a Visiting Fellowship.