Figure 6From: Geochemical evidence for the link between sulfate reduction, sulfide oxidation and phosphate accumulation in a Late Cretaceous upwelling system Schematic illustration of bacterial sulfate reduction and sulfide oxidation under changing redox conditions and the effect on the phosphate deposition (Modified after Brock and Schulz-Vogt [ 25 ] and Dale, et al. [ 42 ]). Back to article page