Trace elements were analyzed by John Bailey (XRF) and Raymond Gwozdz (INAA). The review by Peter S. Meyer is greatly appreciated and improved the manuscript. 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. Funding for this research was provided by Danish Natural Science Council grant number 9701385.