Six cores from the depth intervals in question were scanned every 2 cm with an X-ray fluorescence (XRF) core scanner. The XRF scanner, CORTEX, was developed at the Netherlands Institute for Sea Research at Texel for elemental analyses of split sediment cores (Jansen et al., 1998). This instrument produces reliable counts for the elements K through Sr. Fe counts generally correlate well with magnetic susceptibility, but the hole-to-hole correlation with Fe is often more sensitive because the total Fe content is independent of the redox state of the sediment, which is not the case for the magnetic susceptibility.