We would like to thank S. Koch, K. Wittmaack, N. Gau, A. Jesussek, U. Nielsen, and K. Kissling for sample preparation and laboratory assistance. J. Groeneveld especially thanks M. Greaves and H. Elderfield (Cambridge University) for introduction into Mg/Ca analyses. We thank C. Andersson Dahl for providing the data for Figure F6. We also gratefully thank A. Mix, W. F. Ruddiman, and one anonymous reviewer for their useful comments. This research used samples and 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. This study was performed within DFG-Research Unit, FOR 451 (Impact of Gateways on Ocean Circulation, Climate, and Evolution; funding under Ti240/12-2).