Figure F9. Profiles of elements that may be overprinted by diagenesis or redox reactions in the water column. A. Records of Fe2O3 calculated on a carbonate-free basis (cfb), As/Al ratio, and Mn/Al ratio compared to CaCO3 content. B. Records of Co/Al, Ni/Al, and V/Al ratios. Data for the upper continental crust are from Taylor and McLennan (1985), average loess from Schnetger (1992), average shale from Wedepohl (1971, 1991), and Mekong suspended matter (SPM) from Martin and Meybeck (1979).

Figure F9. Profiles of elements that may be overprinted by diagenesis or redox reactions in the water column. A. Records of Fe₂O₃ calculated on a carbonate-free basis (cfb), As/Al ratio, and Mn/Al ratio compared to CaCO₃ content. B. Records of Co/Al, Ni/Al, and V/Al ratios. Data for the upper continental crust are from Taylor and McLennan (1985), average loess from Schnetger (1992), average shale from Wedepohl (1971, 1991), and Mekong suspended matter (SPM) from Martin and Meybeck (1979).