Table T3. Datum levels for calcareous nannofossils, Site 1257.
Core, section,
interval (cm)
Depth (mbsf)
Depth (mcd)
Datum
Species
Zone
Age
Age (Ma)
Top
Bottom
Top
Bottom
207-1257A-








1H-1, 25–26 0.00 0.25 0.00 0.25 T Amaurolithus delicatus NN13–NN15 late Miocene 4.6
1H-2, 4.5–5.5 0.25 1.55 0.25 1.55 T Discoaster quinqueramus NN11 late Miocene 5.6
1H-CC, 25–30 2.54 2.84 2.54 2.84 B Sphenolithus distentus NP23 early Oligocene 30.4
2H-1, 24–25 2.54 2.84 2.54 2.84 T Dictyococcites bisectus NP23 early Oligocene 25.5
2H-CC, 24–29 11.83 12.44 11.83 12.44 T Reticulofenestra umbilica NP22 early Oligocene 31.7
3H-CC, 35–39 21.60 22.08 21.60 22.08 T Ericsonia formosa NP21 earliest Oligocene 32.9
4H-CC, 23–27 29.15 31.56 29.15 31.56 T Ericsonia obruta NP21 earliest Oligocene 32.2
6X-2, 104–105 42.75 43.14 42.75 43.14 T Discoaster saipanensis NP20 late Eocene 34.0
6X-2, 104–105 43.14 43.84 43.14 43.84 B Dictyococcites bisectus NP20 late Eocene 38.5
6X-2, 104–105 42.75 43.14 42.75 43.14 T Cribrocentrum reticulatum NP20 late Eocene 34.9
6X-3, 24–25 43.14 43.84 43.14 43.84 T Chiasmolithus grandis NP17 middle Eocene 37.1
6X-CC, 21–26 46.76 52.56 46.76 52.56 B Reticulofenestra umbilica NP17 middle Eocene 42.5
8X-CC, 31–36 52.56 61.92 52.56 61.92 T Chiasmolithus grandis NP16 middle Eocene 37.1
9X-4, 25–26 61.92 68.45 61.92 68.45 T Chiasmolithus solitus NP16 middle Eocene 40.4
10X-CC, 46–51 81.51 84.74 81.51 84.74 B Sphenolithus radians NP12/NP13 early Eocene 53.3
10X-CC, 46–51 70.38 81.51 70.38 81.51 T Discoaster multiradiatus NP12/NP13 early Eocene 53.0
13X-CC, 31–36 111.81 120.83 111.81 120.83 B Heliolithus riedelii NP8 late Paleocene 57.3
13X-CC, 31–36 111.81 120.83 111.81 120.83 B Discoaster multiradiatus NP8 late Paleocene 56.2
15X-CC, 39–44 131.32 138.37 130.91 142.00 B Discoaster mohleri NP8 late Paleocene 57.5
16X-CC, 58–63 131.32 138.37 130.91 142.00 T Fasciculithus pileatus NP5 late Paleocene 58.2
17X-1, 25–26 138.37 140.95 142.00 146.42 T Reinhardtites levis CC24 middle Maastrichtian 69.2
20X-1, 25–26 169.65 170.49 175.45 176.29 B Reinhardtites levis CC22 late Campanian 75.7
20X-1, 25–26 169.65 170.49 175.45 176.29 B Uniplanarius trifidum CC22 late Campanian 76.0
20X-5, 0 173.90 175.40 179.70 181.20 T Marthasterites furcatus CC16/CC17 Campanian/Santonian 80.6
21X-CC, 25 179.00 180.15 184.80 185.95 T Lithastrinus septenarius CC15/CC16 Santonian 84.7
24X-CC, 42 212.42 219.26 218.22 225.06 B Eiffellithus turriseiffelii CC10/CC11 Turonian 101.7
29X-CC, 41–46 265.66 271.40 271.46 277.20 B Tranolithus orionatus NC8 Albian 107.3
207-1257B-








4R-CC, 16–21 66.32 73.90 73.43 76.95 B Tribrachiatus orthostylus NP12 early Eocene 53.4
6R-CC, 10–15 73.90 80.07 76.95 84.44 T Fasciculithus tympaniformis NP9 late Paleocene 54.1
9R-CC, 30–35 117.51 127.09 119.28 129.67 B Discoaster mohleri NP7 late Paleocene 57.5
12R-6, 78 144.49 145.31 147.16 147.98 B Fasciculithus ullii NP4/NP5 middle Paleocene 60.0
12R-7, 44 145.31 145.65 147.98 148.32 T Arkhangelskiella cymbiformis CC25 middle Maastrichtian 65.0
16R-CC, 4–9 165.10 170.14 168.30 173.34 T Uniplanarius trifidum CC23 late Campanian~ 71.3
17R-1, 0 174.40 186.66 173.34 189.86 B Uniplanarius trifidum CC23 late Campanian~ 76.0
20R-CC, 21 186.66 190.23 189.86 196.36 T Lithastrinus septenarius CC14 Coniacian 84.7
22R-CC, 19–21 201.29 204.61 207.42 210.74 B Lithastrinus septenarius CC13 Coniacian 88.8
207-1257C-








1R-5, 50 88.00 88.28 88.00 88.28 B Discoaster multiradiatus NP9 early Eocene 56.2
7R-1, 0 139.50 141.00 141.95 143.45 B Heliolithus kleinpellii NP7 late Paleocene 58.2
7R-5. 23 145.23 145.40 147.68 147.85 B Ellipsolithus macellus NP4 early Paleocene 62.2
7R-5, 47 145.40 145.47 147.85 147.92 T Arkhangelskiella cymbiformis CC24 early Maastrichtian~late Campanian 65.0

Note: T = top, B = bottom.