This research used samples 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. Funding for this research was provided by ODP/Germany, project numbers So72/63-2 and So72/63-3. M.A. wants to thank the crew of Leg 183 and the Munich Gang.