Table T1. Carbon concentrations, C/N ratios, and isotopic values of selected mid-Cretaceous samples, Site 1276.
Core, section,
interval (cm)
Depth
(mbsf)
Age
OAE
CaCO3
(wt%)
TOC
(wt%)
Corg/Ntot
(atomic)
13C
()
15N
()
210-1276A-
30R-1, 0–1 1069.40 Turonian   0.0 0.34 16.7

30R-1, 18–19 1069.58 22.5 0.24 7.7

30R-2, 11–12 1070.87 12.7 0.69 19.5

30R-3, 0–1 1072.13 7.2 0.30 10.3

30R-3, 12–13 1072.25 3.2 0.40 16.9 –25.14 2.3
30R-4, 47–48 1074.10 0.0 6.65 22.9 –26.52 –2.51
30R-4, 78–79 1074.41 5.8 0.53 11.1

30R-4, 115–116 1074.78 0.0 1.38 18.6 –25.65 –1.26
30R-4, 128–129 1074.91 0.0 0.13 2.6

30R-5, 33–34 1075.46 11.3 1.14 20.6 –25.8 –0.15
31R-1, 0–1 1079.00 6.2 0.36 9.5 –25.36 0.3
31R-1, 65–66 1079.65 Cenomanian–Turonian 10.4 0.32 11.5

31R-1, 111–113 1080.11 15.5 0.12 4.0

31R-1, 140–142 1080.40 2 0.4 6.54 26.1 –26.01 –2.57
31R-2, 15–18 1080.65 0.0 0.09 3.1

31R-2, 23–26 1080.73 0.0 2.67 24.0

31R-2, 59–62 1081.09 1.7 11.67 33.9 –24.22 –2.13
31R-2, 80–83 1081.30 0.5 8.44 37.9

31R-2, 124–128 1081.74 0.0 3.78 27.8

31R-2, 132–135 1081.82 1.0 6.72 27.7

31R-3, 10–15 1082.05 0.7 2.48 23.5

31R-3, 45–50 1082.40 1.8 7.92 29.4 –23.82 –2.2
31R-3, 51–52 1082.46 0.0 7.18 33.1

31R-3, 98–103 1082.93 1.6 2.11 28.7 –23.96 –0.65
31R-3, 127–129 1083.22 0.0 0.15 7.2

31R-4, 0–1 1083.39 0.0 0.04 1.7

31R-4, 13–18 1083.52 1.7 5.90 27.2 –26.06 –2.7
31R-4, 36–41 1083.75 0.3 0.41 15.7

31R-4, 48–49 1083.87 1.9 5.43 26.5

31R-4, 54–55 1083.93 2.0 0.18 6.7

31R-4, 64–69 1084.03 1.8 6.06 32.1 –26.54 –2.13
31R-4, 109–111 1084.48
0.7 0.26 15.6

31R-5, 97–98 1085.86 Cenomanian 32.5 0.00


31R-6, 32–33 1086.25 14.6 0.98 39.6 –19.57 1.2
32R-1, 0–1 1088.60 54.8 0.52 23.5

32R-1, 30–31 1088.90 38.7 0.17 8.0

32R-2, 83–84 1090.93 65.9 1.00 24.8

32R-2, 144–146 1091.54 0.0 4.65 26.9

32R-3, 48–49 1092.08 51.7 0.40 20.0

32R-4, 0–1 1092.97 2.2 0.00


32R-4, 26–28 1093.23 4.4 0.59 15.7

32R-4, 57–58 1093.54 50.1 0.26 1.5

32R-5, 23–27 1094.65 69.7 1.24 27.3

32R-5, 45–46 1094.87 11.9 3.09 35.7

32R-6, 70–72 1096.62 16.3 1.69 27.8 –26.76 –0.99
32R-7, 30–31 1097.72 0.0 0.66 23.4

32R-7, 49–50 1097.91 1.9 0.26 7.2

33R-1, 0–1 1098.20 4.9 0.43 9.6

33R-1, 16–17 1098.36 2.6 0.24 9.0

33R-1, 125–130 1099.45 9.1 0.24 9.0

33R-2, 138–139 1101.08 34.1 0.39 16.0

33R-3, 13–15 1101.33 1.0 0.98 38.5

33R-3, 91–95 1102.11 70.8 1.32 25.0

33R-3, 139–140 1102.59 29.3 0.43 16.1

33R-4, 0–1 1102.70 30.5 0.70 17.9

33R-4, 19–20 1102.89 28.9 0.33 15.1

33R-4, 133–137 1104.03 12.9 0.75 35.2

33R-5, 11–13 1104.31 MCE 4.0 1.00 24.1 –25.95 1.1
33R-6, 13–14 1105.83 55.0 0.39 18.0

33R-7, 14–15 1107.34 43.6 0.31 12.9

34R-1, 126–127 1109.06 36.1 0.09 10.5

34R-2, 10–11 1109.27 1.8 0.25 11.2

34R-2, 94–98 1110.11 1.3 0.00


34R-2, 100–102 1110.17 26.8 3.27 25.2 –27.25 –3.17
34R-2, 102–106 1110.19 67.3 1.33 19.5

34R-3, 112–113 1111.79
19.9 0.56 27.5

34R-4, 0–1 1112.13 48.2 0.44 19.1

34R-4, 43–44 1112.56 Cenomanian
17.6 0.21 7.5

34R-4, 64–66 1112.77 12.7 0.76 85.3

34R-5, 36–37 1113.40 49.6 0.11 7.6

43R-1, 46–49 1193.96 Albian–Cenomanian 3.2 0.56 13.5

43R-2, 34–36 1195.37 27.2 0.82 21.9 –25.13 1.4
43R-2, 88–92 1195.91
1d
46.6 2.20 23.1 –27.13 –1.98
43R-3, 0–1 1196.55 1.9 0.52 11.6

43R-3, 31–32 1196.86 25.9 0.07 4.1 –25.56 2.6
43R-4, 146–147 1199.41 47.5 1.27 23.3

43R-5, 104–106 1200.51 14.0 1.77 29.8 –25.13 1.4
43R-6, 0–1 1201.00
9.2 0.33 8.6

43R-6, 57–59 1201.57 10.4 0.60 12.9

44R-1, 0–1 1203.20 51.8 1.36 23.8

44R-1, 33–35 1203.53 3.2 0.59 13.5

44R-2, 123–125 1205.96 16.0 0.09 6.1

44R-3, 0–1 1206.20 11.2 0.00


44R-3, 71–72 1206.91 36.1 0.60 19.2

44R-4, 60–62 1208.34 1.3 0.38 11.4

44R-5, 69–71 1209.97 19.9 0.62 17.3

44R-7, 61–63 1212.97 37.4 2.12 18.9 –28.28 –2.45
55R-1, 70–71 1309.90 Albian
1c
13.4 0.78 26.1 –25.265 1.40
55R-2, 0–1 1310.70 49.0 1.80 18.0 –26.8 –2
55R-3, 39–40 1312.59 42.5 0.54 14.8

55R-4, 50–51 1314.20 30.2 0.86 21.1 –25.21 1.30
58R-1, 66–68 1338.76 21.1 1.15 21.3

58R-2, 60–62 1340.20
2.9 1.18 26.9

58R-3, 57–59 1341.67 2.0 0.76 18.3

58R-4, 56–58 1342.66 2.1 0.90 16.0

59R-1, 90–92 1345.00 2.7 0.62 12.9

60R-5, 76–78 1360.36 2.2 0.70 13.6

61R-2, 63–65 1365.33 8.7 1.02 22.4

62R-6, 118–120 1381.58 1.7 0.77 15.0

63R-3, 69–71 1386.19 0.0 0.79 19.7

63R-4, 70–72 1387.70 0.0 0.78 20.1

65R-6, 40–42 1409.70 0.0 0.89 16.2

66R-1, 93–96 1412.23 0.8 0.81 11.7

67R-1, 80–82 1421.70 0.0 0.82 15.4

68R-6, 76–78 1438.76 0.0 0.78 14.4

69R-3, 45–47 1443.25 0.0 0.79 14.0

71R-4, 118–120 1464.88 0.0 4.09 21.3 –27.275 –1.8
72R-2, 72–74 1471.12 1.5 0.73 12.9

72R-5, 112–114 1475.85 14.5 2.06 32.2

73R-1, 111–112 1479.61 ? 1.3 2.78 29.7 –24.01 1.6
73R-2, 13–14 1480.13 1.1 0.87 14.6

73R-3, 0–1 1481.50 1.1 2.09 20.9

73R-3, 46–47 1481.96 1.1 2.63 21.5 –26.86 –1.18
73R-3, 60–62 1482.10 1.5 1.70 19.5

73R-4, 31–32 1483.31 1.1 3.20 21.5 –26.38 –1.22
73R-5, 69–70 1485.19 1.6 1.25 18.7

73R-6, 0–1 1486.00 0.2 0.72 15.9

73R-6, 49–50 1486.49 1.6 0.84 15.1

74R-3, 32–34 1491.42 1.1 2.10 21.6 –25.75 –0.79
74R-4, 33–35 1492.93
20.2 0.67 91.7

75R-4, 76–79 1502.96 1.5 1.34 18.3

76R-1, 119–122 1508.49 5.2 1.07 16.4

77R-3, 109–111 1520.99 8.8 0.96 15.6

78R-1, 133–135 1527.83 3.0 1.31 15.1

79R-1, 62–64 1536.82 13.7 0.99 15.6

79R-4, 54–56 1541.24 5.9 1.05 16.1 –24.18 –1.35
79R-5, 108–110 1543.28 0.0 0.74 16.7

79R-5, 123–125 1543.43 8.8 0.99 17.9 –24.29 1.8
79R-5, 145–148 1543.65 15.0 0.85 18.1

79R-6, 46–48 1544.16 0.0 3.76 23.5 –26.99 –0.95
80R-1, 5–7 1545.85 10.6 0.56 11.1

80R-2, 120–122 1548.50 9.3 1.12 49.8

80R-3, 129–131 1550.09 0.6 0.70 14.8

81R-1, 81–83 1556.21 0.0 1.29 20.1

81R-6, 45–47 1562.57 6.0 1.27 17.6

82R-1, 0–1 1565.00 23.5 0.50 30.5

82R-1, 6–9 1565.06
3.5 0.22 5.1

83R-1, 103–105 1575.53 6.3 1.08 20.2

84R-2, 79–81 1586.49 5.5 1.11 15.7

85R-1, 128–130 1588.98 7.5 1.12 15.3

86R-5, 8–10 1600.88 4.7 1.34 20.1

87R-4, 118–121 1610.22 6.7 1.28 17.3

91R-1, 114–116 1643.94 3.2 1.24 17.7

92R-6, 27–30 1660.27 2.1 1.39 23.6

93R-2, 58–60 1664.18 4.3 1.57 21.2

94R-1, 8–9 1671.88
1b
6.1 1.89 27.3

94R-2, 14–15 1673.40 25.9 0.29 17.2 –24.37 1.0
94R-3, 47–48 1675.12 25.4 0.26 14.8

94R-3, 102–104 1675.67 2.4 1.96 29.0 –23.81 –1.84
94R-4, 0–1 1676.15 7.0 1.58 20.5 –23.59
94R-4, 31–32 1676.46 13.8 7.41 39.4 –21.85 –2
94R-4, 32–33 1676.47 1.2 4.27 35.6 –23.08 –1.08
94R-4, 142–144 1677.57 17.1 7.80 38.2 –22.18 –1.4
94R-5, 36–37 1677.95 27.1 6.32 41.1

94R-5, 37–39 1677.96 9.4 7.74 33.3 –23.69 –2.09
94R-5, 71–72 1678.30 3.8 1.84 30.8

94R-5, 89–91 1678.48 3.7 4.80 29.9 –23.14 –0.62
94R-6, 0–1 1679.09 8.7 1.51 22.1

94R-6, 12–14 1679.21 7.0 1.82 20.0 –23.47 1.0
94R-6, 34–35 1679.43 10.1 1.74 24.7

94R-CC, 23–24 1680.13 8.2 1.45 21.1 –23.75 1.3
96R-2, 58–61 1692.91 Aptian–Albian
4.0 1.32 16.0

97R-2, 1–3 1702.01 0.9 0.36 9.2 –24.52 2.36
97R-2, 75–77 1702.75 7.6 1.09 14.2

97R-5, 55–57 1706.43 4.0 1.68 24.5

Notes: Age determinations from Shipboard Scientific Party (2004) and S. Gardin (pers. comm.). OAE = oceanic anoxic event, MCE = mid-Cenomanian event, ? = undetermined.