Figure F42. Summary of logs recorded by the Formation MicroScanner (FMS)-sonic tool string in Hole U1344A during the downlog and the second uphole pass. Hole size is calculated by the two orthogonal calipers of the FMS (C1 and C2). High waveform coherence (red in the velocity tracks) is a measure of the reliability of the slowness/time coherence algorithm used to derive compressional (VP) and shear (VS) velocities from the monopole and lower dipole (LD) sonic waveforms, respectively. Waveform amplitude is shown to display any amplitude anomaly that could indicate the occurrence of gas hydrate. None was detected. WF = sonic waveform, TC = gamma ray log from the triple combo, down = recorded during the downlog.
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