Fig. 2

Soft-X radiographs, photographs, lithological column, magnetic susceptibility, and PSV records. In the column, yellow layers indicate coarse layers (> course silt); blue layers are hemipelagite (silt ~ clay); gray horizons are turbidite-mud; red layers and patch are tephra layers or patches. Apparent turbidites (event deposits) are indicated by blue lines, and are numbered beginning at the top layer. Relatively indistinct turbidites are assigned branch numbers. The letters “A”–“E” (relative declination) and “a”–“l” (inclination) added to the PSV records are PSV labels for prominent features of age control (Kanamatsu et al. 2017). Shaded intervals of the PSV record are horizons disturbed by inclinations of minimum axes of anisotropy of magnetic susceptibility (Kanamatsu et al. 2017). Stars indicate horizons at the excess ²¹⁰Pb detection limit and the ¹³⁷Cs maximum (McHugh et al. 2016)