Figure 4. (A) This seismic section shows the position of Holes 997A and 997B with ~10 m accuracy. Massive hydrate was encountered in Hole 997A at 330 mbsf. (B) Sonic and (C) resistivity logs from Hole 997B suggest significantly higher hydrate concentrations (up to 23% of pore volume) at ~365 mbsf, consistent with hydrate accumulation on a high-angle fault. Identification of the individual fault intersected is not possible. (D) Composite paleontological results from these holes shows a hiatus corresponding to ~14 m of missing section (arrow), similar to the throw seen on faults at this depth in Figure 5 (components redrawn from Paull, Matsumoto, Wallace, et al., 1996).