Figure 4. A. Traveltimes for Section 149-897C-34R-1. B. Velocity curve for Sample 149-897C-34R-1. The uncorrected velocity curve does not account for sample shortening during the experiment. The corrected curve is based on a sample length determined by linearly interpolating between the length of the sample at atmospheric pressure (measured before the experiment) and the maximum pressure (taken to be the sample length after the experiment). The vertical dashed line indicates the best estimate of the in situ effective pressure. See text for discussion.