Figure F9. Migration of the volcanic front (VF) from Ohguchi et al. (1989). Offshore position of the VF at ~20 Ma is estimated from the drilled evidence (Moore and Fujioka, 1980). Two curves are drawn for 16/14 Ma depending on inclusion of the Hachinohe-oki volcanic rock. There are also two estimates for 12 Ma, but these are not relevant in this paper.

Figure F9. Migration of the volcanic front (VF) from Ohguchi et al. (1989). Offshore position of the VF at ~20 Ma is estimated from the drilled evidence (Moore and Fujioka, 1980). Two curves are drawn for 16/14 Ma depending on inclusion of the Hachinohe-oki volcanic rock. There are also two estimates for 12 Ma, but these are not relevant in this paper.