Extended Data Fig. 3: Chronology.
From: Sill-controlled salinity contrasts followed post-Messinian flooding of the Mediterranean
Three peaks in the Ba/Ti record were tuned to insolation maxima (precession minima, June 21, 65°N)63 between 5140 and 5182 ka. Below this (splice depth 125.03–127.23 m), clear Ba/Ti peaks are absent, so ages were interpolated linearly assuming a sedimentation rate equivalent to that for 5162–5182 ka. This assumption is validated by the resulting insolation maximum alignment at 5312 ka (splice depth 127.23 m) with the next Ba/Ti peak. The succeeding Ba peak (at splice depth 128.35 m) is the largest, so the maximum of the smoothed curve was tuned to 5333 ka based on the timing of the Mediterranean reflooding event3. Available ODP 967 biostratigraphic datums22 (a, b, c, d) validate our chronology (see Supplementary Table 2 for details).
