Figure F6. Covariation of (A) pyrite (SP) and (B) organic sulfur (SORG) contents as a function of total organic carbon (TOC) contents. Dashed line marks the relationship derived for normal marine sediments as defined by Berner and Raiswell (1983). o = Leg 207, this study. x = data for Holocene and Pleistocene sediments from the Black Sea (Core BS4-14GC; Calvert et al., 1996; Core GeoB 7620-2, M. Böttcher and B. Jørgensen, unpubl. data). + = data for sapropelic sediments from the Mediterranean Sea (Böttcher et al., 2003).