Figure F16. Core-scale cyclic variations of color (L*, a*, and b*), gamma-ray attenuation (GRA) bulk density, magnetic susceptibility, and natural gamma radiation by MST measurement. The diatom-rich intervals correspond to slightly higher a* values (reddish), low resistivity, low NGR counts, and low density. In contrast, clay-rich intervals show a slightly lower a* value (light reddish or light greenish), high resistivity, high NGR counts, and high density.