Fig. 3.

Radiocarbon dates, ¹⁰Be concentrations, and diatom concentrations in cores TC17, TC31, and GC1604 (A–C) from the western Ross Sea (red filled circles in inset map show core locations). Correlation of cores TC 17 and TC31 and their associated piston cores PC 17 and PC31 was done using lithological information and AIO ages from both cores to establish that the base of core TC31 sampled the transition between subice shelf and open marine sediments, consistent with the decrease in ¹⁰Be in the bottom of the core, and core TC 17 bottomed out just above this transition.