Fig. 2

a Stratigraphic position of samples studied at ODP Site 925. The thick dashed vertical line indicates the waterdepth of Site 925, thin gray dashed vertical lines indicate water depths of the remaining sites during ODP Leg 154. The shaded areas (i.e., black, dark gray, light gray, and white) represent calcite preservation (i.e., barren, poor, moderate, and good) on Ceara Rise and were taken from Fig. 6 in Chaisson and Pearson (1997). It shows, that carbonate oozes at Site 925 experienced no or only little calcite dissolution. b Age (in Ma) versus depth (meters below seafloor) plot used for the calculation of numerical sample ages at ODP Hole 925B according to data from Bickert et al. (1997). High-resolution data were provided for this site after personal correspondence with Torsten Bickert from 23 September, 2007, and are supplied as file AgeModel_925B.txt in the electronic supplementary materials