Table T5. Stratigraphic positions of selected calcareous nannofossil datums, Site 1265. 
Datum
Top of sample interval
Base of sample interval
Age (Ma)
Core, section, interval (cm)
Depth
Core, section, interval (cm)
Depth
Youngest
Oldest
(mbsf)
(mcd)
(mbsf)
(mcd)




208-1265A-

208-1265A-

T Pseudoemiliania lacunosa 0.46 0.46 1H-1, 20 0.20 1.82 1H-1, 120 1.20 2.82
T Large Gephyrocapsa spp. 1.22 1.22 1H-2, 120 2.70 4.32 1H-3, 120 4.20 5.82
B Large Gephyrocapsa spp. 1.58 1.58 1H-3, 120 4.20 5.82 1H-4, 120 5.70 7.32
T Calcidiscus macintyrei 1.67 1.67 1H-4, 120 5.70 7.32 1H-5, 120 7.20 8.82
B Medium Gephyrocapsa spp. 1.69 1.69 1H-4, 120 5.70 7.32 1H-5, 120 7.20 8.82
T Discoaster brouweri and D. triradiatus 1.95 1.97 1H-5, 120 7.20 8.82 1H-6, 120 8.70 10.32
T Discoaster pentaradiatus 2.52 2.52 1H-CC 9.46 11.08 2H-CC 18.53 21.26
T Reticulofenestra pseudoumbilicus 3.82 3.82 1H-CC 9.46 11.08 2H-CC 18.53 21.26
T Amaurolithus spp. 4.56 4.56 2H-CC 18.53 21.26 3H-CC 28.58 31.88
T Nicklithus amplificus 6.00 6.00 3H-CC 28.58 31.88 4H-1, 15 28.65 33.55
B Nicklithus amplificus 6.84 6.84 4H-3, 2 31.37 36.27 4H-3, 50 31.85 36.75
B Amaurolithus primus 7.39 7.39 4H-3, 50 31.85 36.75 4H-3, 100 32.35 37.25
B Discoaster bellus gr. (D. hamatus) 10.48 10.48 5H-1, 110 39.10 45.80 5H-2, 40 39.90 46.60
B Catinaster coalitus 10.79 10.79 5H-5, 40 44.40 51.10 5H-7, 50 47.50 54.20
B Triquetrorhabdulus rugosus 12.81 12.81 6H-4, 110 53.10 60.95 6H-5, 15 53.65 61.50
T Sphenolithus heteromorphus 13.55 13.55 6H-CC 56.89 64.74 7H-CC 66.83 75.01
B Sphenolithus heteromorphus 17.76 17.76 8H-CC 76.12 85.74 9H-1, 40 76.40 87.52
T Sphenolithus belemnos 17.89 17.89 8H-CC 76.12 85.74 9H-1, 40 76.40 87.52
B Sphenolithus belemnos 18.92 18.92 9H-4, 120 81.70 92.82 9H-5, 40 82.40 93.52
T Sphenolithus delphix 23.07 23.07 12H-7, 70 113.90 128.86 12H-CC 114.10 129.06
B Sphenolithus delphix 23.33 23.33 13H-1, 70 114.70 130.60 13H-1, 100 115.00 130.90
T Sphenolithus ciperoensis 24.23 24.23 13H-3, 130 118.30 134.20 13H-CC 123.90 139.80
T Sphenolithus distentus 25.98 25.98 13H-CC 123.90 139.80 14H-CC 132.58 150.38
B Sphenolithus ciperoensis 27.55 27.55 15H-5, 70 139.70 159.45 15H-5, 137 140.37 160.12
B Sphenolithus distentus 30.32 30.32 16H-4, 30 147.30 167.73 16H-4, 100 148.00 168.43
T Sphenolithus pseudoradians

17H-1, 30 152.30 173.53 17H-1, 110 153.10 174.33
T Reticulofenestra umbilicus >14 µm 31.7 31.7 17H-4, 30 156.80 178.03 17H-4, 110 157.60 178.83
T Isthmolithus recurvus 32.7 32.7 17H-4, 30 156.80 178.03 17H-4, 110 157.60 178.83
T Ericsonia formosa 32.9 32.9 18H-1, 110 162.60 184.60 18H-2, 30 163.30 185.30
T Discoaster saipanensis 34.0 34.0 18H-CC 170.02 192.02 19H-1, 30 171.30 194.61
T Calcidiscus protoannulus 35.4 35.4 19H-3, 30 174.30 197.61 19H-3, 145 175.45 198.76
B Isthmolithus recurvus 36.6 36.6 19H-5, 39 177.39 200.70 19H-5, 145 178.45 201.76
B Chiasmolithus oamaruensis 37.0 37.0 20H-3, 20 183.70 208.22 20H-3, 60 184.10 208.62
T Chiasmolithus grandis 37.1 37.1 20H-3, 60 184.10 208.62 20H-3, 140 184.90 209.42
B Dictyococcites bisectus 38.5 38.5 20H-4, 140 186.40 210.92 20H-5, 20 186.70 211.22
B Dictyococcites scrippsae 40.3 40.3 20H-CC 187.43 211.95 21H-1, 40 190.40 216.05
T Nannotetrina spp. 42.3 42.3 20H-CC 187.43 211.95 21H-1, 40 190.40 216.05
B Reticulofenestra umbilicus >14 µm 42.5 42.5 21H-1, 40 190.40 216.05 21H-7, 30 199.30 224.95
B Nannotetrina spp. 47.8 47.8 21H-CC 199.78 225.43 22H-1, 40 199.90 228.48
B Discoaster sublodoensis 49.3 49.3 21H-CC 199.78 225.43 22H-1, 40 199.90 228.48
T Discoaster lodoensis 48.0 48.0 22H-2, 110 202.10 230.68 22H-3, 40 202.90 231.48
T Tribrachiatus orthostylus 51.0 51.0 23H-2, 40 210.90 241.38 23H-2, 110 211.60 242.08
B Discoaster lodoensis 52.4 52.4 24H-5, 40 224.90 257.86 24H-5, 110 225.60 258.56
T Discoaster multiradiatus 53.0 53.0 25H-5, 45 234.45 268.64 25H-5, 140 235.40 269.59
B Sphenolithus radians 53.3 53.3 26H-2, 60 239.60 275.95 26H-2, 100 240.00 276.35
B Tribrachiatus orthostylus 53.4 53.4 26H-5, 90 244.40 280.75 26H-6, 90 245.90 282.25
B Discoaster diastypus 53.9 53.9 27H-5, 25 253.25 291.28 27H-CC 256.97 295.00
T Fasciculithus spp.

29H-3, 140 269.78 310.56 29H-4, 20 270.08 310.86

Increase Zygrhablithus bijugatus

29H-6, 100 273.88 314.66 29H-7, 15 274.53 315.31
B Rhomboaster spp.

29H-7, 50 274.88 315.66 29H-7, 68 275.06 315.84
B Discoaster multiradiatus 56.2 56.2 34X-3, 70 295.80 340.23 34X-CC 296.21 340.64




208-1265B-

208-1265B-

T Pseudoemiliania lacunosa 0.46 0.46 1H-1, 1 0.01 0.01 1H-CC 4.73 4.73
T Discoaster brouweri and D. triradiatus 1.95 1.95 1H-CC 4.73 4.73 2H-CC 14.63 16.08
T Reticulofenestra pseudoumbilicus 3.82 3.82 2H-CC 14.63 16.08 3H-CC 23.93 26.81
T Amaurolithus spp. 4.56 4.56 2H-CC 14.63 16.08 3H-CC 23.93 26.81
T Nicklithus amplificus 6.00 6.00 3H-CC 23.93 26.81 4H-CC 32.98 37.25
B Amaurolithus primus 7.39 7.39 3H-CC 23.93 26.81 4H-CC 32.98 37.25
B Discoaster bellus gr. (D.hamatus) 10.48 10.48 4H-CC 32.98 37.25 5H-CC 42.85 49.55
B Catinaster coalitus 10.79 10.79 5H-CC 42.85 49.55 6H-CC 52.37 59.94
B Triquetrorhabdulus rugosus 12.81 12.81 5H-CC 42.85 49.55 6H-CC 52.37 59.94
T Sphenolithus heteromorphus 13.55 13.55 6H-CC 52.37 59.94 7H-2, 44 54.14 63.04
B Sphenolithus heteromorphus 17.76 17.76 8H-CC 70.13 80.33 9H-CC 79.46 90.73
T Sphenolithus belemnos 17.89 17.89 8H-CC 70.13 80.33 9H-CC 79.46 90.73
B Sphenolithus belemnos 18.92 18.92 9H-CC 79.46 90.73 10H-CC 89.89 102.76
B Sphenolithus disbelemnos 22.67 22.67 11H-CC 99.29 112.71 12H-7, 84 109.51 123.96
T Sphenolithus delphix 23.07 23.07 13H-3, 80 113.00 129.06 13H-3, 120 113.40 129.46
B Sphenolithus delphix 23.33 23.33 13H-4, 30 114.00 130.06 13H-4, 90 114.60 130.66
T Sphenolithus ciperoensis 24.23 24.23 13H-CC 117.30 133.36 14H-CC 128.61 145.78
T Sphenolithus distentus 25.98 25.98 13H-CC 117.30 133.36 14H-CC 128.61 145.78
B Sphenolithus ciperoensis 27.55 27.55 14H-CC 128.61 145.78 15H-CC 137.92 156.59
B Sphenolithus distentus 30.32 30.32 16H-CC 147.39 167.50 17H-CC 156.20 177.32
T Sphenolithus pseudoradians

16H-CC 147.39 167.50 17H-CC 156.20 177.32
T Reticulofenestra umbilicus >14 µm 31.7 31.7 17H-CC 156.20 177.32 18H-CC 166.27 188.80
T Ericsonia formosa 32.9 32.9 17H-CC 156.20 177.32 18H-CC 166.27 188.80
T Isthmolithus recurvus 32.7 32.7 19H-1, 60 166.80 189.28 19H-3, 100 170.20 192.68
T Discoaster saipanensis 34.0 34.0 19H-3, 110 170.30 192.78 19H-5, 130 173.50 195.98
T Chiasmolithus grandis 37.1 37.1 20H-CC 184.00 208.59 21H-CC 194.50 219.82
B Dictyococcites bisectus 38.5 38.5 20H-CC 184.00 208.59 21H-CC 194.50 219.82
B Dictyococcites scrippsae 40.3 40.3 20H-CC 184.00 208.59 21H-CC 194.50 219.82
T Nannotetrina spp. 42.3 42.3 20H-CC 184.00 208.59 21H-CC 194.50 219.82
B Reticulofenestra umbilicus >14 µm 42.5 42.5 20H-CC 184.00 208.59 21H-CC 194.50 219.82
B Nannotetrina spp. 47.8 47.8 20H-CC 184.00 208.59 21H-CC 194.50 219.82
T Discoaster lodoensis 48.0 48.0 21H-CC 194.50 219.82 22H-CC 199.64 232.62
B Discoaster sublodoensis 49.3 49.3 22H-CC 199.64 232.62 23H-CC 213.46 243.21
T Tribrachiatus orthostylus 51.0 51.0 22H-CC 199.64 232.62 23H-CC 213.46 243.21
B Discoaster lodoensis 52.4 52.4 24H-CC 222.20 253.64 25H-1, 66 223.86 257.31
T Discoaster multiradiatus 53.0 53.0 25H-CC 232.47 265.92 26H-CC 242.41 277.10
B Tribrachiatus orthostylus 53.4 53.4 25H-CC 232.47 265.92 26H-CC 242.41 277.10
B Sphenolithus radians 53.3 53.3 26H-CC 242.41 277.10 27H-CC 251.77 288.73



208-1265D-

208-1265D-

B Discoaster diastypus 53.9 53.9 1X-CC 251.54 289.44 2X-CC 267.33 305.60
T Fasciculithus spp.

2X-CC 267.33 305.60 3X-CC 272.57 311.26

Increase Zygrhablithus bijugatus

3X-CC 272.57 311.26 4X-CC 274.88 315.71
B Rhomboaster spp.

4X-CC 274.88 315.71 5X-CC 274.89 315.87

Note: T = top, B = bottom.