Figure 16. Stratigraphic variation in the ratio of the red (650 nm) to blue (450 nm) wavelength end-member at Holes 1075A, 1075B, and 1075C, displaying a pronounced periodicity possibly corresponding to the 23-k.y. precession cycle.

Figure 16. Stratigraphic variation in the ratio of the red (650 nm) to blue (450 nm) wavelength end-member at Holes 1075A, 1075B, and 1075C, displaying a pronounced periodicity possibly corresponding to the 23-k.y. precession cycle.