Table T13. Calcareous nannofossil and planktonic foraminifer datums used in the preliminary age-depth model, Hole 1257A.
Core, section, interval (cm)
Depth (mbsf)
Age (Ma)
Foraminifer
zone
Nannofossil
zone
Epoch
Top
Base
Minimum
Maximum
207-1257A-






1H-1, 26 0.26
4.56 8.28
NN11 late Miocene
1H-1, 50–55 0.5 0.55 5.54 8.58 M14–M13b, reworked Miocene
Pliocene
1H-2, 4.5 1.54
5.54 8.28
NN11 late Miocene
1H-CC, 25–30 2.54 2.59 28.1 30.4
NP23 early Oligocene
1H-CC, 25–30 2.54 2.59 30.3 32 P19
late Oligocene
2H-1, 24 2.84
28.1 30.4
NP23 early Oligocene
2H-7, 23 11.83
28.1 30.4
NP23 early Oligocene
2H-CC, 24–29 12.44 12.49 31.7 32.9
NP22 early Oligocene
2H-CC, 24–29 12.44 12.49

P19
late Oligocene
3H-1, 50–54 12.6 21.64 30.3 32 P19
late Oligocene
3H-2, 50–54 14.1 14.14 32 33.8 P18
early Oligocene
3H-3, 50–54 15.6 15.64

P18
early Oligocene
3H-4, 50–54 17.1 17.15

P18
early Oligocene
3H-5, 50–54 18.6 18.65

P18
early Oligocene
3H-6, 50–54 20.1 20.14

P18
early Oligocene
3H-7, 25 21.35
31.7 32.9
NP22 early Oligocene
3H-7, 50–54 21.6 21.64

P18
early Oligocene
3H-CC, 35–39 22.08 22.12 32.9 34
NP21 earliest Oligocene
3H-CC, 35–39 22.08 22.12

P18
early Oligocene
4H-CC, 23–27 31.56 31.6 32.2 33.7
NP21 earliest Oligocene
4H-CC, 23–27 31.56 31.6

P18
early Oligocene
5H-CC, 46–51 40.95 41 32.9 34
NP21 earliest Oligocene
5H-CC, 46–51 40.95 41

P18
early Oligocene
6X-1, 46–48 41.06 41.08

P18
early Oligocene
6X-2, 50–52 42.6 42.62 32 33.8 P18
early Oligocene
6X-2, 65 42.75
32.9 34
NP21 earliest Oligocene
6X-2, 104 43.14
34.9 38.5
NP20 late Eocene
6X-3, 24 43.84
37.1 38.5
NP17 middle Eocene
6X-3, 50–52 44.1 44.12 38.4 40.1 P14
middle Eocene
7X-1, 52–54 45.42 45.44

P14
middle Eocene
6X-4, 46–48 45.56 45.58

P14
middle Eocene
6X-CC, 21–26 46.76 46.81 37.1 38.5
NP17 middle Eocene
6X-CC, 21–26 46.76 46.81

P14
middle Eocene
7X-2, 51–54 46.91 46.94

P14–P13
middle Eocene
7X-3, 49–52 48.39 48.42 38.4 40.1 P14
middle Eocene
7X-4, 47–51 49.87 49.91 40.1 40.5 P13
middle Eocene
7X-5, 51–55 51.41 51.45

P13
middle Eocene
7X-CC, 20–25 52.56 52.61 40.4 42.5
NP16 middle Eocene
8X-1, 46–49 54.56 54.59

P13
middle Eocene
8X-2, 47–48 56.07 56.08 40.1 40.5 P13
middle Eocene
8X-3, 51–53 57.61 57.63 40.5 43.6 P12
middle Eocene
8X-4, 49–52 59.09 59.12

P12
middle Eocene
8X-5, 50–53 60.6 60.63 40.5 43.6 P12
middle Eocene
8X-CC, 31–36 61.92 61.97 40.4 42.5
NP16 middle Eocene
9X-4, 50–54 68.7 68.74 43.6 45.8 P11
middle Eocene
9X-4, 95 69.15
40.4 42.5
NP16 middle Eocene
9X-5, 25 69.45
40.4 42.5
NP16 middle Eocene
9X-5, 50–54 69.7 69.74 45.8 49 P10
middle Eocene
9X-CC, 43–48 70.38 70.43 53 53.3
NP11 early Eocene
9X-CC, 43–48 70.38 70.43 52.3 54.7 P6
early Eocene
10X-1, 50–54 73.8 73.84 52.3 54 P6B
early Eocene
10X-2, 50–54 75.3 75.34

P6
early Eocene
10X-3, 26–30 76.56 76.6

P6
early Eocene
10X-4, 48–53 78.28 78.33

P6
early Eocene
10X-5, 40–45 79.7 79.75

P6
early Eocene
10X-6, 40–46 80.7 80.76

P6
early Eocene
10X-CC, 46–51 81.51 81.56 53 53.3
NP11 early Eocene
10X-CC, 46–51 81.51 81.56

P6
early Eocene
11X-1, 49–54 83.49 83.54 52.3 54.7 P6
early Eocene
11X-2, 27–32 84.61 84.66

P4 and P6
early Eocene
11X-2, 40 84.74
53 54.1
NP9/NP10 early Eocene
12X-1, 50–51 93.1 93.11 54.7 55.9 P5
late Paleocene
12X-2, 50–54 94.6 94.64 55.9 59.2 P4
late Paleocene
12X-3, 50–54 96.1 96.14

P4
late Paleocene
12X-CC, 47–52 98.32 98.37 53 54.1
NP9/NP10 early Eocene
12X-CC, 47–52 98.32 98.37

P4
late Paleocene
13X-CC, 31–36 111.81 111.86 56.2 56.5
NP8 late Paleocene
13X-CC, 31–36 111.81 111.86

P4
late Paleocene
14X-CC, 12–17 120.83 120.88 57.3 57.5
NP7 late Paleocene
14X-CC, 12–17 120.83 120.88

P4
late Paleocene
15X-1, 51–54 122.01 122.04

P4
late Paleocene
15X-4, 47–52 126.47 126.52

P4
late Paleocene
15X-6, 47–51 129.47 129.51

P4
late Paleocene
15X-CC, 39–44 131.32 131.37 57.3 57.5
NP7 late Paleocene
15X-CC, 39–44 131.32 131.37

P4
late Paleocene
16X-1, 50–52 131.6 131.62

P4
late Paleocene
16X-3, 48–51 134.58 134.61

P4
late Paleocene
16X-4, 49–52 136.09 136.12

P4
late Paleocene
16X-5, 40–43 137.5 137.53 57.1 59.2 lower P4
late Paleocene
16X-CC, 58–63 138.37 138.42 58.2 59.3
NP5 late Paleocene
17X-1, 25 140.95
69.2 71.3
CC23 middle Maastrichtian
17X-1, 50–54 141.2 141.24



early Maastrichtian
17X-3, 50–54 144.16 144.2 68.6 72.8 KS30
late Campanian–early Maastrichtian
17X-4, 48–50 145.64 145.66 68.6 72.8 KS30
late Campanian–early Maastrichtian
17X-6, 25 148.11
69.2 71.3
CC23 middle Maastrichtian
17X-CC, 59–64 149.08 149.13 69.2 71.3
CC23 middle Maastrichtian
18X-CC, 27–32 159.98 160.03 69.2 71.3
CC23 middle Maastrichtian
18X-CC, 27–32 159.98 160.03 68.6 73.8 KS29-KS30
late Campanian–early Maastrichtian
20X-1, 26 169.66
75.3 76
CC22 middle Campanian
20X-2, 102 171.92
75.3 76
CC22 middle Campanian
20X-5, 0 175.4
80.6 84.8
CC18–CC16 early Campanian–late Santonian
21X-1, 0 179
84.7 88.8
CC16/CC17 Santonian
21X-CC, 0–5 179.9 179.95 83.5 85.8

Santonian
22X-CC, 15–20 190.88 190.93 84.7 88.8
CC16/CC17 Santonian
22X-CC, 15–20 190.88 190.93 83.5 89

Coniacian–Santonian
23X-CC, 19–24 206.67 206.72 84.7 88.8
CC16/CC17 Santonian
23X-CC, 19–24 206.67 206.72 85.8 89

Coniacian
24X-CC, 22–28 212.22 212.28 91


Turonian
24X-CC, 22–28 212.22 212.28 89 93.5

Turonian
25X-CC, 43–46 219.33 219.36 93.5


late Cenomanian
27X-4, 143 242.43
101.7 107.3
CC8 Albian
27X-CC, 46–51 244.08 244.13 99.1


late Albian
29X-CC, 0 265.25
101.7 107.3
CC8 Albian
30X-CC, 0 274.94
101.7 107.3
CC8 Albian
31X-CC, 0 275.91
107.3 112.5
CC8 Albian

Note: Both minimal and maximal assigned ages (Ma) are given for each sample analyzed.