Figure F24. Concentration of calcium carbonate (CaCO₃), total organic carbon (TOC), total ni-trogen (TN), total sulfur (TS), and TOC/TN vs. depth at Site 1090; the data are reported in Table T13, p. 96. The solid line in CaCO₃ concentrations shows a long-term trend, which was smoothed with a 7-point running mean.