Figure F15. Total reflectance and magnetic susceptibility for the interval 175 to 185 mbsf (middle Eocene). With sedimentation rates averaging 5.2 m/m.y. through this interval, the mean cycle wavelength is roughly 50-60 cm and would correspond to a period of roughly 100 k.y. The accurate correction factor for the raw instrument magnetic susceptibility values is 0.68 x 10-5.