I am grateful to the crew, technicians, and scientific staff of Leg 188. Julia Thiele and Marco Klann are thanked for technical assistance. A constructive review by Carol Pudsey improved the manuscript. This research used samples provided by the Ocean Drilling Program (ODP). The 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 the Deutsche Forschungsgemeinschaft DFG, Project Number We 992/34.