Table T3. Datum levels for calcareous nannofossils, Site 1260.
Core, section,
interval (cm)
Depth (mbsf)
Depth (mcd)
Datum
Species
Zone
Age
Age
(Ma)
Top
Bottom
Top
Bottom
207-1260A-







1R-CC, 12–18 0.75 3.85 0.75 3.85 B Emiliania huxleyi NN21 late Pleistocene 0.3
2R-CC, 8–14
3.85
3.85 Slumps; no datums given
NP 23/21 mixed early Oligocene
3R-CC, 13–18
14.51
14.51 Slumps; no datums given
NP 23/21 mixed early Oligocene
4R-CC, 0–5 27.50
27.50
Slumps; no datums given
NP 23/21 mixed early Oligocene





E/O boundary is in 5R-5


5R-CC, 19–24



T Cribrocentrum reticulatum NP 20 late Eocene 34.9
5R-CC, 19–24 27.50 36.10 27.50 36.10 B Dictyoccocites bisectus NP17 middle Eocene 38.5
7R-CC, 0–5 36.10 45.79 36.10 45.79 T Chiasmolithus solitus NP16 middle Eocene 40.4
10R-CC, 8–13 45.79 56.19 45.79 56.29 B Reticulofenestra umbilicus NP16 middle Eocene 42.5
14R-CC, 19–24 85.45 96.15 84.55 94.77 T Nannotetrina fulgens NP15 middle Eocene 43.5
17R-CC, 13–19 114.67 124.79 112.69 123.11 T Chiasmolithus gigas NP15 middle Eocene 44.0
18R-CC, 11–17 134.50 148.84 132.69 147.03 B Chiasmolithus gigas NP15 middle Eocene 46.1
22R-CC, 0–5 163.31 171.95 161.50 170.14 T Discoaster sublodoensis NP14 middle Eocene 47.2
24R-CC, 13–18 184.61 192.10 182.80 190.29 B Discoaster sublodoensis NP14 middle Eocene 48.0
26R-CC, 10–15 217.93 229.89 216.12 228.08 B Sphenolithus radians NP11 early Eocene 53.3
27R-CC, 9–15 239.50 249.46 237.69 247.95 T Fasciculithus sp. NP9 early Eocene 54.1
30R-7, 72 239.50 249.46 237.69 247.95 X Zygrhablithus bijugatus/fasciculiths (= PETM) NP9 Eocene/Paleocene boundary 55.0
32R-CC, 22–25 276.72
275.95
B Discoaster multiradiatus NP9 late Paleocene 56.2
34R-CC, 20–22 292.35 307.01 291.58 306.24 B Discoaster mohleri NP7 late Eocene 57.5
36R-4, 92–92 317.30 327.00 316.22 325.92 T Cretaceous taxa NP1 K/T Boundary 65.0
37R-CC, 24–27 332.12
332.84
B Micula murus CC26 late Maastrichtian 66.2
40R-CC, 17–22 346.38 354.50 346.63 355.24 T Uniplanarius trifidum CC23 late Campanian 71.3
42R-CC, 20–22 365.38 374.56 366.12 377.22 B Marthasterites furcatus CC12 late Turonian 89.3
45R-CC, 21–27 390.70 396.47 393.82 399.59 B Eprolithus eptapetalus CC11 Turonian 93.2
48R-5, 146–150 411.97 422.05 415.09 425.12 T Axopodorhabdus albianus CC10a late Cenomanian 94.0
52R-CC, 7–11 432.13 440.64 435.72 444.23 B Eiffellithus turriseiffelii NC10a late Albian 101.7
53R-2, 129–130 477.63 484.09 481.04 487.50



207-1260B-







3R-CC, 15–19 56.41 62.86 55.74 61.36 T Chiasmolithus solitus NP16 middle Eocene 40.4
5R-CC, 9–14 78.58 88.03 78.05 86.85 B Reticulofenestra umbilicus NP16 middle Eocene 42.5
10R-CC, 17–22 117.23 126.28 115.57 124.12 T Nannotetrina fulgens NP15 middle Eocene 43.5
11R-CC, 9–17 126.28 135.45 124.12 132.89 T Chiasmolithus gigas NP15 middle Eocene 44.0
12R-CC, 19–24 243.49 251.51 237.16 246.45 X Tribrachiatus contortus/T. orthostylus NP11 early Eocene 53.4
13R-CC, 19–24 251.51 256.39 246.45 251.78 B Tribrachiatus bramlettei NP10 early Eocene 53.9
17R-7, 69–69 279.84 279.84 275.97 275.97 X Zygrhablithus bijugatus/fasciculiths (= PETM) NP9 Eocene/Paleocene boundary 55.0
19R-CC, 26–32 293.93 309.31 292.71 307.63 B Discoaster multiradiatus NP9 late Paleocene 56.2
21R-CC, 16–22 319.22 328.50 317.19 329.05 B Discoaster mohleri NP7 late Eocene 57.5
23R-3, 83–83 332.33 332.33

T Cretaceous taxa NP1 K/T Boundary 65.0
24R-CC, 3–8 344.06 357.80 344.56 354.66 B Micula murus CC26 late Maastrichtian 66.2
26R-CC, 11–16 357.80 367.27 354.66 368.83 T Uniplanarius trifidum CC23 late Campanian 71.3
31R-CC, 21–24 393.42 412.69 395.63 415.39 B Marthasterites furcatus CC12 late Turonian 89.3
34R-CC, 0–5 423.56 433.69 428.10 437.04 B Eprolithus eptapetalus CC11 Turonian 93.2
43R-CC, 0–6 491.18 494.33 493.86 497.01 B Eiffellithus turriseiffelii NC10a late Albian 101.7

Note: B = bottom, T = top, E/O = Eocene/Oligocene, X = crossover in relative abundance, K/T = Cretaceous/Tertiary. PETM = Paleocene/Eocene Thermal Maximum.