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Table T3. Calcareous nannofossil datums, Site U1336. (See table note.)

Core, section, interval (cm) Marker species Age
(Ma)
Depth CSF (m)
Top Bottom Top Bottom Midpoint ±
320-U1336A- 320-U1336A-
1H-1, 110 T Coronocyclus nitescens 12.12   1.10 1.10  
1H-1, 110 T Calcidiscus premacintyrei 12.45   1.10 1.10  
2H-4, 80 2H-6, 80 Tc Cyclicargolithus floridanus 13.33 13.30 16.30 14.80 1.50
2H-CC 3H-2, 90 T Sphenolithus heteromorphus 13.53 17.68 19.90 18.79 1.11
4H-2, 90 4H-4, 90 Tc Discoaster deflandrei 15.66 29.40 32.40 30.90 1.50
5H-4, 64 5H-6, 35 B Discoaster petaliformis 15.70 41.64 44.35 43.00 1.36
7H-2, 50 7H-3, 52 Bc Sphenolithus heteromorphus 17.71 57.50 59.02 58.26 0.76
7H-2, 50 7H-3, 52 Tc Sphenolithus belemnos 17.95 57.50 59.02 58.26 0.76
7H-2, 50 7H-3, 52 T Triquetrorhabdulus carinatus 18.28 57.50 59.02 58.26 0.76
8H-CC 9H-1, 55 B Sphenolithus belemnos 19.03 74.38 75.05 74.72 0.34
13H-6, 60 13H-CC Tc Triquetrorhabdulus carinatus 22.09 120.60 122.58 121.59 0.99
15H-CC 16H-2, 90 B Sphenolithus disbelemnos 22.80 133.38 135.40 134.39 1.01
    Oligocene/Miocene boundary          
17H-2, 90 17H-4, 90 T Sphenolithus delphix 23.1 144.40 147.40 145.90 1.50
17H-6, 90 17H-CC B Sphenolithus delphix 23.2 150.40 151.84 151.12 0.72
20H-5, 100 20H-CC T Sphenolithus ciperoensis 24.4 177.50 180.13 178.82 1.32
20H-5, 100 20H-CC X T. longus/T. carinatus 24.7 177.50 180.13 178.82 1.32
19H-5, 70 19H-6, 70 Tc Cyclicargolithus abisectus 24.7 167.70 169.20 168.45 0.75
24X-1, 112 24X-3, 73 T Sphenolithus distentus 26.8 203.52 206.13 204.83 1.30
24X-3, 112 24X-5, 53 T Sphenolithus predistentus 26.9 206.13 208.93 207.53 1.40
24X-5, 53 24X-CC B Sphenolithus ciperoensis 27.1 208.93 209.62 209.28 0.34
29X-3, 40 29X-CC B Sphenolithus distentus 30.0 253.80 254.52 254.16 0.36
34X-CC 35X-1, 34 T Reticulofenestra umbilicus 32.0 294.07 298.64 296.36 2.29
321-U1336B- 321-U1336B-
1H-CC 2H-CC T Coronocyclus nitescens 12.12 1.68 11.88 6.78 5.10
1H-CC 2H-CC T Calcidiscus premacintyrei 12.45 1.68 11.88 6.78 5.10
2H-CC 3H-CC Tc Cyclicargolithus floridanus 13.33 11.63 21.16 16.40 4.77
2H-CC 3H-CC T Sphenolithus heteromorphus 13.53 11.63 21.16 16.40 4.77
4H-CC 5H-CC Tc Discoaster deflandrei 15.66 30.54 40.30 35.42 4.88
6H-CC 7H-CC Bc Sphenolithus heteromorphus 17.71 49.87 58.68 54.28 4.41
6H-CC 7H-CC T Sphenolithus belemnos 17.95 49.87 58.68 54.28 4.41
6H-CC 7H-CC T Triquetrorhabdulus carinatus 18.28 49.87 58.68 54.28 4.41
9H-CC 10H-CC B Sphenolithus belemnos 19.03 77.72 87.80 82.76 5.04
14H-1, 149 14H-2, 149 Tc Triquetrorhabdulus carinatus 22.09 117.29 118.79 118.04 0.75
15H-1, 10 15H-2, 10 B Sphenolithus disbelemnos 22.80 125.40 126.90 126.15 0.75
    Oligocene/Miocene boundary          
16H-CC 17H-1, 150 T Sphenolithus delphix 23.1 136.81 138.30 137.56 0.75
17H-3,149 17H-4, 148 B Sphenolithus delphix 23.2 141.29 142.78 142.04 0.75

Note: T = top, Tc = top common, B = bottom, Bc = bottom common, X = abundance crossover.

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