Fig. S3.

Results for the western Ross Sea sediments. All sediments contain high ¹⁰Be and diatoms, suggesting that analyzed sections only captured timing after the ice-front retreat (A–C). Thus, all of the cores provide the minimum ages of ice retreat. Symbols in the leftmost panel (age versus depth plot) are calendar ages of fatty acid radiocarbon dates (red) and acid-insoluble organic carbon measurements (♦: refs. 16 and 17; : this study). These ages are consistent with corresponding timings of grounded line retreat (6) as well as the scenario obtained from the western Ross Sea cores (Fig. 2 and Fig. S2).