Figure F56. Logging gamma radiation, Site U1418. Diatom ooze, diatom-rich mud, mud with clasts, and bioturbation are combined observations from Holes U1418A and U1418C–U1418F and are compared to natural and spectral gamma radiation measured during downhole logging with the triple combo (TC) and Formation MicroScanner (FMS)-sonic tool strings. Gamma ray measurements from the FMS-sonic (black curves) are superposed to gamma ray measurements from the triple combo (colored curves) to highlight reproducibility and coherency between the different passes.
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