*3.4. Chronology*

The chronology of the core KIM-2A is based on five accelerator mass spectroscopy radiocarbon (AMS <sup>14</sup>C) dates (on *G. ruber* tests at Beta Analytics laboratories), supplemented by tie-points which correspond to well-dated bio-litho-stratigraphic horizons (e.g., sapropel and planktonic foraminiferal biozone boundaries) from nearby Aegean cores (Table 1). Conventional <sup>14</sup>C ages were calibrated by means of the Calib version 7.0.2 software [81] and the Marine13 data set with a regional reservoir age correction (∆R) of 139 ± 40 years for the S1 interval [82] and of 58 ± 85 years outside the sapropel S1 interval [83]. The chronology adopted in this study for core KIM-2A was derived from a polynomial fit through the calibrated dates and the chronostratigraphic control points' dating as shown in Table 1. Hereafter, ages in this study are reported in calibrated thousands of years before present, notated ka BP.


**Table 1.** Calibrated radiocarbon dates (AMS <sup>14</sup>C) and chronostratigraphic control points' dates.
