Fig. 2: Example of the sequence of a typical transition from a glacial (terrigenous facies) to deglacial (color-banded facies) and interglacial (greenish grey facies) conditions as seen from XRF scanning data and core image of U1533B-14H section 4.
From: West Antarctic ice retreat and paleoceanography in the Amundsen Sea in the warm early Pliocene
Panel (a) core image with facies characterization from old to young and bottom to top: color-banded silty clay (CB) that is moderately bioturbated, mostly terrigenous with occasional siliceous fragments and rare outsized clasts, grading upward into greenish grey massive and bioturbated diatomaceous silty clay (GG) with outsized clasts, including pebbles, overlain by dark grey laminated silty clay (DG), mostly terrigenous with turbidites and rare outsized sand and gravel, (b) elevated Ti/Nb values in the greenish grey facies and the overlying laminated clays, (c) elevated Ba/Rb ratios in the greenish grey facies, (d) increases in Zr/Rb values in the greenish grey facies, with maxima in the other facies related to coarse-grained laminae, (e) maxima in Ca/Ti and Mn/Ti at the upward transition from greenish grey to dark grey laminated facies, and (f) lower K/Ti and Al/Ti ratios in the greenish grey facies, signaling a different provenance for the terrigenous fraction. Source data are provided as a Source Data file.
