We established composite depths based on the correlation between Cores 180-1110A-1H and 180-1110B-1H (Table T19). The correlation was made based on key beds and magnetic susceptibility curves (Fig. F32).
Sediments in Cores 180-1110A-1H and 180-1110B-1H have eight key sedimentary beds that enable visual correlation between the holes. The magnetic susceptibility curves are similar to each other, and 24 peaks (13 positive and 11 negative peaks) were used for correlation. Both sedimentary features and magnetic susceptibility allow a precise correlation (Fig. F32).
Composite depth (Table T19) was established by the procedures described in "Composite Depths" of the "Site 1109" chapter. Based on our calculation, the top depth of Core 180-1110B-1H is 0.05 m deeper than the top of Core 180-1110A-1H.