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. Grateful acknowledgment is given to the crew of the JOIDES Resolution and the ODP Leg 190 scientific team. The authors would like to thank Andy Fisher and Brandon Dugan for reviewing the manuscript and providing helpful suggestions and comments. R.H.A. would also like to thank A.J. Bolton and B. Hubbard for advice and support and D. Kelly and G. Duller for computer assistance.
Funding was provided by the Natural Environment Research Council (NERC grant number NER/S/J/2000/05943) to R.H.A.