Fig. 22
From: Shallow structure and late quaternary slip rate of the Osaka Bay fault, western Japan
Seismic Lines 7 and 8 combined with lithology previously reported at borehole sites #57-30, 56-9, and 56-2 near Kansai Airport, ~ 2.3 km east of Line 7. Boreholes are placed in their reported distance and depths. Lithology bar is modified after Nakaseko (1987). Ages (ka) are based on tephra and pollen assemblages (Nakaseko 1987). Ma: marine clay. The bases of Ma 13 and 11 correspond to the bases of the Holocene alluvium and Late Pleistocene colluvium, respectively. Units A1’, A2, and B1 defined in this study are interpreted to represent the Holocene alluvium (Ma13), and Unit B2, C1, and C2 to comprise the Late Pleistocene colluvium. Note that the correlation of the base of C3 with Ma 11 is speculative, and may not necessarily coincide (Sect. 5.1.2). The red-dotted line is an extrapolation of the bedding geometry indicated from the seismic section