ACKNOWLEDGMENTS

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 recognize and acknowledge with thanks the vitally important input of all the scientists involved in ODP Leg 189: sedimentologists, biostratigraphers, paleomagnetists, physical properties specialists, wireline loggers, and geochemists. We draw heavily on the results of their labors published in the "Leg Summary" chapter (Shipboard Scientific Party, 2001a) of the Initial Reports volume. Lorri Peters of IODP edited the text in detail. Peter Webb of Ohio State University and especially Alan Cooper of Stanford University are thanked for their thoughtful reviews of the paper, and John Firth of IODP provided further comments.

Exon publishes with the permission of the CEO of Geoscience Australia, and Kennett acknowledges and appreciates funding from JOI/USSAC (U.S. Science Advisory Committee) and the National Science Foundation (Marine Geology and Geophysics).

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