Fig. 2: Age model of Site U1537.
From: Antiphased dust deposition and productivity in the Antarctic Zone over 1.5 million years
a Low-resolution age control for Site U1537 (Supplementary Table 1) is provided by magnetostratigraphy (5 reversals; brown squares; see also76) and biostratigraphy (18 datums; green diamonds with red bars indicating age uncertainties). Black and blue dots show the 133 tie points used to construct the high-resolution age model (Supplementary Table 2). Age uncertainties (blue shaded areas) were calculated using Undatable Matlab tools77 (“Methods”). Note that magnetic reversal boundaries were used as direct tie points, whereas the microfossil datums only provided limits. Note further that the sedimentation rates are generally higher since ~0.4 Ma (~20 cm/kyr) than before that time (~10 cm/kyr). b U1537 magnetic susceptibility (MS; green) record versus depth. c U1537 MS record versus age, dust flux record of ice core EDC based on the AICC2012 age scale26 (brown) and LR04 δ18O stack23 (red-blue). Underlain gray lines are the tie points for tuning maxima in MS to EDC dust flux peaks (0–0.8 Ma; black dots in age model) and to minima in the LR04 stack (0.8–1.5 Ma; blue dots in age model). Black-white pattern shows paleomagnetic reversals on the Geomagnetic Polarity Time Scale (GPTS). For 0–0.8 Ma ages are displayed on the AICC 2012 age scale26.
