Figure 59. Sonic waveforms from the DSI tool over the logged interval of Hole 899B (392-422 mbsf). A. Waveforms generated by the upper dipole transmitter. B. Waveforms generated by the Stoneley monopole transmitter, indicating reflections from the caliper deviation at 404.5 m and a permeable zone between 413 and 417 mbsf. C. Waveforms generated by the P and S monopole transmitter. Horizontal axis is time, vertical axis is depth.