Extended Data Fig. 1: Neodymium isotope data for bulk detrital sediment, <63 μm fraction, and reductive sediment leachates in U1361A, in comparison to regional bedrock endmembers.
From: Ice loss from the East Antarctic Ice Sheet during late Pleistocene interglacials
a, Down core measurements on the different fractions, with boxes and arrows on the right indicating bedrock endmember compositions in the region (refs 5,39 and references cited therein). Horizontal lines indicate Holocene core top values for bulk detrital samples (red dashed line) and 1 h leachate samples (black dashed line). Error bars are 2 s.d. external reproducibility, and are smaller than the symbol sizes where not shown. b, Regional bedrock map, with those same bedrock endmembers located by coloured shading (map redrawn from ref. 5, with topography from ref. 12, and the subglacial extent of the FLIP shown by a green dotted outline inferred from ref. 21). In addition to the three endmembers shown in a, purple shading on the map indicates Archaean to Proterozoic basement rocks of the Adélie Craton, with highly unradiogenic Nd isotopic compositions (εNd = –20 to –29). CB, Central Basin; HB, Horn Bluff. For interpretation of the leachate and detrital Nd isotope data, see Methods. Map redrawn from ref. 5 with permission.
