Figure F18. Plots of carbonate and total organic carbon content, hydrogen index values, total sulfur content, and C/N and C/S ratios, Site 1195. Solid vertical lines at HI = 150 and C/S = 2 mark the approximate boundary between terrigenous (<150) and marine organic matter and the transition between marine and brackish environments of formation, respectively.

Figure F18. Plots of carbonate and total organic carbon content, hydrogen index values, total sulfur content, and C/N and C/S ratios, Site 1195. Solid vertical lines at HI = 150 and C/S = 2 mark the approximate boundary between terrigenous (<150) and marine organic matter and the transition between marine and brackish environments of formation, respectively.