Figure 1. P-P image (a) and P-SV image (b) across gas-charged Gulf of Mexico sediments that are lithified and stratified. P-P horizons P-H1 through P-H5 are interpreted to be depth equivalent to P-SV horizons S-H1 through S-H5. A P-wave wipeout zone extends from CDP coordinates 10,000 to 10,150. P-SV data (b) image geology quite well inside this zone.