Composite S-wave section for a portion of line 2: S1 and S2 sections are spliced together at the line tiepoint, and time-aligned at the TN1 (TN1) marker. Evidence of shear wave splitting (interval traveltime difference between S1 and S2 sections) is seen within the Z-TN1 and the MB-DG4 intervals. The TGR-Z and TN1-MB intervals show nearly equivalent S1 and S2 interval traveltimes (negligible S-wave anisotropy). Note also that amplitude differences between S1 and S2 within the Z-TN1 interval: The reflections are much higher in amplitude and coherency on S1 than on S2. The S1-S2 amplitude difference is most pronounced in the top 80 ms. (about 300 ft) of the Z-TN1 interval, suggesting that the upper part of the interval is more anisotropic than the lower part.