Three seismic profiles showing the WBSF and their interpretations. Original seismic reflection profiles of (a) ODKM-Line B, (c) KR02-11-d1 and (e) KR01-14-1. The locations of these seismic profiles are displayed in Figure 1. In the interpretation profiles (b, d, f), red hatched areas denote slope sediment. Yellow areas denote the accretionary wedge. Gray areas denote subducting oceanic crust.