Figure 3 – Seismic section passing through well 78. This seismic profile illustrates the overturned Simpson section that would have been incorrectly interpreted as Ellenburger if industry-provided formation tops were honored. The original (but incorrect) log-defined top of Ellenburger was the well tic at 2.22 sec. After imposing the overturned geology identified by log analysis, well 78 did not penetrate the Ellenburger – and the seismic interpretation was modified to emphasize this fact. Each labeled horizon identifies the top of the particular unit, regardless of whether the label is above or below the horizon. Phantom horizons must be constructed across some image areas.