I thank the Ocean Drilling Program for inviting me to join Leg 149, and Prof. J.E. van Hinte for proposing my participation to ODP, arranging laboratory facilities at the Vrije Universiteit of Amsterdam, and editing the manuscript. I also thank the Stichting Geologisch, Oceanografisch en Atmosferische Onderzoek (GOA) for their financial support, and Dr. J. Smit and Dr. Douglas G. Masson for manuscript revisions.