Figure 7.

Core correlation of the central Japan Trench basins (after Ikehara et al., 2016) and the bulk OM ¹⁴C age distribution and TOC of GeoB16431 (Bao et al., 2018) supported by XRF‐CS, MS, and density data, colored in their specific clusters, and heavy mineral data (LF and MM = lithic fragments and minerals with high MS, respectively). Besides variabilities in thickness, grain size, TOC, and bulk OM ¹⁴C age distribution of the three event layers, there are well‐defined inherent chemical fingerprints (plotted in different colors of the associated clusters) which can be strikingly traced across the three cores from separated trench‐basins >40 km apart from each other (see Figure 1). Furthermore, the background sedimentation changes at the To‐a tephra from BG3 (dark blue) and BG1 (green) to BG1 (green) and BG2 (light blue).