Figure F4. Downcore variations of selected geochemical parameters for Sites (A) 1257, (B) 1258, (C) 1259, (D) 1260, and (E) 1261. Definition of lithological units according to Erbacher, Mosher, Malone, et al. (2004). TOC = total organic carbon, TIC = total inorganic carbon, FeT = total iron, FeD = still-reactive iron, FeP = pyrite iron, ST = total sulfur, SP = pyrite sulfur, SORG = OM (essentially kerogen)-bound organic sulfur. Dashed line in the relative abundance of highly reactive iron (FeHR/FeT) plots indicates boundary to euxinic conditions (see "Reactive Iron Phases and Pyrite Formation," ).

Figure F4. Downcore variations of selected geochemical parameters for Sites (A) 1257, (B) 1258, (C) 1259, (D) 1260, and (E) 1261. Definition of lithological units according to Erbacher, Mosher, Malone, et al. (2004). TOC = total organic carbon, TIC = total inorganic carbon, Fe_T = total iron, Fe_D = still-reactive iron, Fe_P = pyrite iron, S_T = total sulfur, S_P = pyrite sulfur, S_ORG = OM (essentially kerogen)-bound organic sulfur. Dashed line in the relative abundance of highly reactive iron (Fe_HR/Fe_T) plots indicates boundary to euxinic conditions (see "Reactive Iron Phases and Pyrite Formation").