This is the second of two parts on the critical role of accurate seismic velocity measurements in subsurface imaging.The next example illustrates the link between the interpretation of seismic velocity trends and geologic interpretation of subsurface depth structures. Click here to enlarge imageThe example is taken from the Perdido fold belt in US territorial waters. A series of southwest-northeast trending compressional folds is the norm; however, a nearly circular anticline is apparent in the middle of the trend (see Figs. 13 and 14). The central circular structure has been drilled on its flank, confirming a good tie between ground or well velocities, and processing velocities.3 Click...