Figure F5. Comparison of shipboard color reflectance data with ¹⁸O results on G. ruber in isotope Stage 6 at Hole 1063D. Whereas there is no obvious relationship between sediment lightness (chromaticity L*; solid line) and ¹⁸O, it does appear that redder intervals (higher chromaticity a*; dashed line) are associated with higher ¹⁸O. Solid circles = ¹⁸O of G. ruber.