I thank the Ocean Drilling Program and its staff for their assistance during the cruise and the sampling at the Gulf Coast Repository in College Station. I would like to thank Jean Guex and Carlota Escutia for their suggestions on this manuscript. I am grateful to Peter Baumgartner, Elisabetta Erba, Francesca Lozar, and Roger Larson for interesting discussions. The reviews by Luis O'Dogherty and an unknown reviewer greatly help us to improve this work.

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. The Swiss National Science Foundation is acknowledged for providing travel funds and grant for this research (project 2100-55573.98 to P.O. Baumgartner).