2170 cm TOC CaCO3 d13C d15N 0 0.68 5.6 1 0.67 6.3 -21.5 6.3 2 0.58 5.0 -21.5 6.3 3 0.55 4.1 -21.6 5.8 4 0.54 3.8 -21.8 6.0 5 0.50 3.0 -22.0 6.0 6 0.52 2.5 -22.1 6.2 7 0.51 2.3 -22.4 5.2 8 0.50 2.3 -22.5 5.1 9 0.46 2.5 -22.4 5.2 10 0.42 2.5 -22.4 4.4 11 0.40 1.9 -22.5 4.6 12 0.30 1.2 -22.3 4.3 13 0.37 2.9 -21.9 5.0 14 0.40 3.3 -21.9 5.0 15 0.42 2.9 -22.0 4.8 16 0.44 2.6 -22.0 5.0 17 0.37 3.6 -21.8 4.7 18 0.36 3.8 -22.7 4.8 19 0.33 3.3 -21.9 4.4 20 0.32 1.7 -22.2 4.0 21 0.32 0.9 -22.6 4.1 22 0.31 1.6 -22.6 4.0 23 0.32 1.4 -22.5 4.2 24 0.32 1.5 -22.6 4.3 25 0.34 1.1 -22.6 4.6 26 0.43 0.9 -22.8 4.3 27 0.37 1.4 -22.5 4.1 28 0.34 1.4 -22.7 4.4 29 0.31 2.1 -22.5 4.1 30 0.33 1.6 -22.2 4.4