Figure F20. Plots of carbonate and total organic content, hydrogen index values, total sulfur content, and C/N and C/S ratios, Site 1198. The 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 (<2) and brackish environments of formation, respectively.

Figure F20. Plots of carbonate and total organic content, hydrogen index values, total sulfur content, and C/N and C/S ratios, Site 1198. The 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 (<2) and brackish environments of formation, respectively.