This study was supported by the Deutsche Forschungsgemeinschaft (Sonderforschungs-bereich 261 at the Bremen University). We thank the ODP technicians and the drilling crew for their efforts in sediment recovery. We acknowledge fruitful discussions with Lydie Dupont, Britta Jahn, Fred Jansen, and Jolanda van Iperen during Leg 175 and postcruise. We would like to thank U. Zielinski, J. Whitehead, and an anonymous reviewer for their suggestions, which helped improve the final version.