We thank the shipboard party and the Co-chiefs Gregor Eberli and Peter Swart of Leg 166 for collecting the samples and the staff of the ODP Core Repository in Bremen, Germany, for their assistance and hospitality during our stay to carry out additional subsampling. Also, we are very grateful to the research assistants, Steffen Zamhöfer and Marion Kötter, and our ODP Finnish representative Johanna Suhonen who conducted a great deal of the laboratory work. Thanks are also due to Christian Bühring for editorial help. We are grateful to GEOMAR in Germany and the Geology Department of Edinburgh University in Scotland for providing the facilities. We would especially like to thank Ian Alexander for his assistance in conducting the isotope measurements and Geoff Angell for his technical assistance during the XRD analysis. We are also grateful to R. Petschik for the MacDiff program, which aided in processing the XRD data. André Droxler and Geoff Haddad are thanked for their constructive reviews. Due thanks are also given to the German Science Foundation (DFG Re 1051/4), which provided the financial support.