Figure 4. Seismic cross section through Site 989 (top). Interpretations shown in line drawing (middle) and migrated interpretation (bottom). Steeply dipping to subvertical prerift sediments were encountered within the rotated fault block located below the lava sequence at Site 917. ODP Sites 914-917 are described in Larsen, Saunders, Clift, et al. (1994). Seismic velocities used in the depth conversion and migration are given in km/s.