Table T3. Calcareous nannofossil datums, Site 1218.
Core, section,
interval (cm)
Marker species
Age
(Ma)
Depth (mbsf)
Depth (mcd)
Top
Bottom
Midpoint
±
Midpoint
±
199-1218A- 199-1218A-





4H-7, 50 4H-CC B Catinaster coalitus 10.8 36.78 0.08 41.20 0.08
5H-7, 15 5H-CC T Sphenolithus heteromorphus 13.6 46.01 0.16 50.81 0.16
5H-7, 15 5H-CC T Discoaster deflandrei acme 16.2 46.01 0.16 50.81 0.16
6H-CC 7H-1, 120 T Triquetrorhabdulus carinatus ? 56.11 0.79 63.56 1.40
9H-2, 80 9H-2, 130 T Triquetrorhabdulus carinatus acme ? 77.25 0.25 87.51 0.25
9H-4, 80 9H-4, 130 B Sphenolithus disbelemnos 23.5 80.25 0.25 90.51 0.25
9H-5, 130 9H-6, 20 B Discoaster druggii ? 82.20 0.20 92.46 0.16
10H-1, 140 10H-2, 10 T Sphenolithus delphix 23.7 85.70 0.10 97.60 0.09
10H-2, 70 10H-3, 30 B Sphenolithus delphix 24.4 86.95 0.55 98.85 0.54
11H-2, 130 11H-3, 130 T Sphenolithus ciperoensis 24.7 97.25 0.75 110.65 0.71
11H-4, 130 11H-5, 38 T Cyclicargolithus abisectus acme ? 99.79 0.29 113.19 0.25
13H-3, 75 13H-4, 45 T Sphenolithus distentus 26.5 117.05 0.60 131.96 0.56
14H-5, 80 14H-6, 80 B Sphenolithus ciperoensis 28.1 129.75 0.75 145.17 0.75
18H-CC 19H-1, 120 B Sphenolithus distentus 30.4 170.22 0.68 190.69 0.59
22X-2, 70 22X-2, 147 T Reticulofenestra umbilicus 14 µm 31.7 198.49 0.39 220.79 0.38
23X-2, 148 23X-3, 35 T Ericsonia formosa 32.9 208.67 0.19 231.91 0.16
24X-4, 78 24X-4, 90 T Discoaster saipanensis 34.0 220.04 0.06 245.12 0.06
24X-5, 56 24X-5, 85 T Discoaster barbadiensis 34.2 221.41 0.15 246.49 0.15
25X-7, 70 25X-CC T Chiasmolithus grandis 37.1 234.11 0.21 260.38 0.07
26X-5, 60 26X-6, 125 B Dictyococcites bisectus 38.5 241.98 1.08 268.05 0.32
27X-CC 28X-1, 50 T Chiasmolithus solitus 40.4 252.06 1.95 277.09 0.85
30X-2, 90 30X-3, 2 T Nannotetrina spp. 42.3 273.41 0.31 297.64 0.31
199-1218B- 199-1218B-





5H-2, 56 5H-2, 88 B Discoaster kugleri 11.9 34.62 0.16 40.28 0.16
5H-7, 45 5H-CC T Cyclicargolithus floridanus 13.2 42.04 0.19 47.70 0.19
13H-6, 80 13H-6, 148 T Dictyococcites bisectus ? 117.04 0.34 132.53 0.34

Notes: B = bottom, T = top. ? = uncalibrated datum. This table is also available in ASCII. [N1]