Figure F36. Comparison of core moisture and density (MAD) porosity and downhole log bulk density porosity, gamma radiation, and P-wave velocity from downhole logging and discrete P-wave velocity measurements (PWS3). Also shown is total magnetic field from downhole logging. Large-amplitude spikes in the magnetic field were edited out. PWS3 = P-wave sensor 3, HSGR = standard gamma ray, MST = multisensor track, NGR = natural gamma ray, HLDS = hostile environment lithodensity sonde.