Figure F7. Core-log integration. Pervasive meter-scale rhythmic variations were observed in borehole resistivity and core density logs at Sites 1238, 1239, and 1241. Such variability is likely associated with fluctuations in the fractions of carbonate and biogenic opal in the sediments. The Formation MicroScanner (FMS) image of the borehole at Site 1241 is shown to the right of the 64-button average (5-point smoothing) in red. The similarity of the smoothed FMS and the lower-resolution gamma ray attenuation (GRA) bulk density record (blue) in cores from Hole 1241B suggests that borehole logs will provide a relatively continuous proxy record of lithologic variability and will provide for detailed integration of depth scales between the borehole and core logs. Eld = equivalent logging depth.
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