Table T5. Stratigraphic positions of selected calcareous nannofossil datums, Site 1266. 
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)




208-1266A-

208-1266A-

T Pseudoemiliania lacunosa 0.46 0.46 1H-1, 110 1.10 4.24 1H-3, 110 4.10 7.24
T Large Gephyrocapsa spp. 1.22 1.22 1H-5, 110 7.10 10.24 1H-7, 35 9.35 14.49
B Large Gephyrocapsa spp. 1.58 1.58 1H-7, 35 9.35 12.49 1H-CC 9.99 13.13
T Calcidiscus macintyrei 1.67 1.67 2H-2, 40 11.40 15.97 2H-3, 40 12.90 17.47
B Medium Gephyrocapsa spp. 1.69 1.69 2H-3, 40 12.90 17.47 2H-4, 40 14.40 18.97
T Discoaster brouweri and D. triradiatus 1.95 1.95 2H-4, 40 14.40 18.97 2H-5, 40 15.90 20.47
T Discoaster pentaradiatus 2.52 2.52 3H-1, 40 19.40 25.39 3H-2, 40 20.90 26.89
T Discoaster tamalis 2.83 2.83 3H-3, 110 23.10 29.09 3H-4, 110 24.60 30.59
T Reticulofenestra pseudoumbilicus 3.82 3.82 5H-1, 130 39.30 48.14 5H-2, 130 40.80 49.64
T Amaurolithus spp. 4.56 4.56 5H-3, 130 42.30 51.14 5H-4, 130 43.80 52.64
B Ceratolithus rugosus 5.1 5.1 6H-2, 30 49.30 59.57 6H-3, 130 51.80 62.07
B Ceratolithus acutus 5.37 5.37 7H-2, 130 59.80 71.49 7H-3, 30 60.30 71.99
B Amaurolithus primus 7.39 7.39 7H-6, 30 64.80 76.49 7H-6, 70 65.20 76.89
B Discoaster bellus gr. (D. hamatus) 10.48 10.48 8H-5, 120 73.70 86.81 8H-6, 140 75.40 88.51
B Catinaster coalitus 10.79 10.79 9H-2, 130 78.80 93.34 9H-3, 130 80.30 94.84
B Triquetrorhabdulus rugosus 12.81 12.81 9H-2, 130 78.80 93.34 9H-3, 130 80.30 94.84
T Sphenolithus heteromorphus 13.55 13.55 9H-6, 70 84.20 98.74 9H-CC 84.61 99.15
B Sphenolithus heteromorphus 17.76 17.76 10H-6, 80 92.90 108.73 10H-7, 55 93.65 109.48
T Sphenolithus belemnos 17.89 17.89 10H-CC 93.93 109.76 11H-1, 30 94.40 111.65
B Sphenolithus belemnos 18.92 18.92 11H-5, 120 101.30 118.55 11H-6, 60 102.20 119.45
B Sphenolithus disbelemnos 22.67 22.67 13H-3, 130 117.40 137.50 13H-4, 130 118.90 139.00
B Discoaster druggii 22.82 22.82 11H-7, 20 102.80 120.05 11H-7, 90 103.50 120.75
T Sphenolithus delphix 23.07 23.07 13H-7, 20 122.30 142.40 13H-7, 80 122.90 143.00
B Sphenolithus delphix 23.33 23.33 13H-CC 123.12 143.22 14H-1, 40 123.00 144.53
T Sphenolithus ciperoensis 24.23 24.23 14H-5, 40 129.00 150.53 14H-6, 45 130.55 152.08
B Sphenolithus ciperoensis 27.55 27.55 15H-CC 141.88 164.83 16H-1, 50 142.10 166.48
T Sphenolithus distentus 25.98 25.98 16H-3, 50 145.10 169.48 16H-5, 50 148.10 172.48
T Sphenolithus pseudoradians 29.1 29.1 17H-2, 120 153.80 179.61 17H-3, 120 155.30 181.11
B Sphenolithus distentus 30.32 30.32 17H-5, 120 158.30 184.11 17H-CC 160.43 186.24
T Reticulofenestra umbilicus >14 µm 31.7 31.7 19H-2, 30 171.00 199.66 19H-2, 130 172.00 200.66
T Ericsonia formosa 32.9 32.9 19H-7, 75 178.95 207.61 19H-CC 179.12 207.78
T Discoaster saipanensis 34.0 34.0 21H-1, 40 189.50 221.00 21H-1, 120 190.30 221.80
T Discoaster barbadiensis 34.2 34.2 21H-2, 30 190.90 222.40 21H-2, 120 191.80 223.30
T Calcidiscus protoannulus 34.9 34.9 21H-5, 30 195.40 226.90 21H-6, 30 196.90 228.40
B Isthmolithus recurvus 36.6 36.6 24H-1, 45 215.45 250.84 24H-CC 215.88 251.27
T Chiasmolithus grandis 37.1 37.1 24H-CC 215.88 251.27 25H-1, 15 216.05 251.58
B Dictyococcites scrippsae 40.3 40.3 26X-CC 218.66 254.37 27X-1, 128 222.88 259.26
T Nannotetrina spp. 42.3 42.3 26X-CC 218.66 254.37 27X-1, 128 222.88 259.26
B Reticulofenestra umbilicus >14 µm 42.5 42.5 26X-CC 218.66 254.37 27X-1, 128 222.88 259.26
T Discoaster sublodoensis 47.2 47.2 27X-1, 28 221.88 258.26 27X-2, 30 223.40 259.78
B Nannotetrina spp. 47.8 47.8 27X-2, 118 224.28 260.66 27X-3, 30 224.90 261.28
T Discoaster lodoensis 48.0 48.0 27X-3, 120 225.80 262.18 27X-4, 30 226.40 262.78
B Discoaster sublodoensis 49.3 49.3 27X-6, 85 229.95 266.33 27X-7, 30 230.40 266.78
T Tribrachiatus orthostylus 51.0 51.0 27X-CC 230.94 267.32 28X-1, 60 231.70 269.51
B Discoaster lodoensis 52.4 52.4 29X-2, 40 242.60 281.84 29X-2, 112 243.32 282.56
T Discoaster multiradiatus 53.0 53.0 30X-3, 18 253.48 294.17 30X-3, 99 254.29 294.98
B Sphenolithus radians 53.3 53.3 30X-3, 99 254.29 294.98 30X-4, 40 255.20 295.89
B Tribrachiatus orthostylus 53.4 53.4 30X-3, 99 254.29 294.98 30X-4, 40 255.20 295.89
B Discoaster diastypus 53.9 53.9 30X-4, 102 255.82 296.51 30X-5, 50 256.80 297.49
T Fasciculithus spp.

30X-CC 259.93 300.62 31X-1, 10 260.10 303.23

Decrease Fasciculithus spp.

31X-3, 3 263.03 306.16 31X-3, 13 263.13 306.26

Increase Zygrhablithus bijugatus

31X-3, 13 263.13 306.26 31X-3, 23 263.23 306.36
B Rhomboaster spp.

31X-3, 36 263.36 306.49 31X-3, 38 263.38 306.51
B Discoaster multiradiatus 56.2 56.2 34X-2, 30 290.70 339.48 34X-2, 120 291.60 340.38




208-1266B-

208-1266B-

T Chiasmolithus grandis 37.1 37.1 1H-CC 7.60 7.60 2H-CC 229.56 262.56
B Nannotetrina spp. 47.8 47.8 1H-CC 7.60 7.60 2H-CC 229.56 262.56
T Discoaster lodoensis 48.0 48.0 2H-CC 229.56 262.56 3H-CC 239.17 273.59
T Tribrachiatus orthostylus 51.0 51.0 2H-CC 229.56 262.56 3H-CC 239.17 273.59
B Discoaster lodoensis 52.4 52.4 4H-CC 248.63 284.48 5H-CC 258.44 295.72
T Discoaster multiradiatus 53.0 53.0 4H-CC 248.63 284.48 5H-CC 258.44 295.72
B Sphenolithus radians 53.3 53.3 4H-CC 248.63 284.48 5H-CC 258.44 295.72
B Tribrachiatus orthostylus 53.4 53.4 4H-CC 248.63 284.48 5H-CC 258.44 295.72
B Discoaster diastypus 53.9 53.9 4H-CC 248.63 284.48 5H-CC 258.44 295.72
T Fasciculithus spp.

5H-CC 258.44 295.72 6H-7, 114 267.54 306.24

Increase Zygrhablithus bijugatus

6H-7, 114 267.54 306.24 6H-7, 128 267.68 306.38
B Rhomboaster spp.

6H-7, 148 267.88 306.58 6H-CC 268.16 306.86
B Discoaster multiradiatus 56.2 56.2 9X-CC 292.32 336.49 10X-CC 302.08 347.69
B Heliolithus riedelii 57.3 57.3 11X-CC 311.23 358.28 12X-1, 30 311.70 360.19
B Discoaster mohleri 57.5 57.5 12X-2, 12 313.02 361.51 12X-2, 115 314.05 362.54




208-1266C-

208-1266C-

B Catinaster coalitus 10.79 10.79 1H-CC 71.56 79.73 2H-CC 81.45 90.60
T Sphenolithus heteromorphus 13.55 13.55 3H-CC 88.4 98.35 4H-CC 98.18 109.30
B Sphenolithus heteromorphus 17.76 17.76 4H-CC 98.18 109.3 5H-CC 107.35 121.20
B Sphenolithus disbelemnos 22.67 22.67 5H-CC 107.35 121.2 6H-CC 115.95 132.07
B Discoaster druggii 22.82 22.82 5H-CC 116.52 133.1 6H-CC 115.95 132.07
T Sphenolithus ciperoensis 24.23 24.23 9H-CC 144.02 162.5 10H-CC 154.49 174.35
T Sphenolithus distentus 25.98 25.98 9H-CC 144.02 162.5 10H-CC 154.49 174.35
B Sphenolithus ciperoensis 27.55 27.55 11H-CC 163.79 185.15 12H-CC 172.98 196.71
T Sphenolithus pseudoradians 29.1 29.1 11H-CC 163.79 185.15 12H-CC 172.98 196.71
T Reticulofenestra umbilicus >14 µm 31.7 31.7 12H-CC 172.98 196.71 13H-CC 182.49 207.96
T Ericsonia formosa 32.9 32.9 13H-CC 182.49 207.96 14H-CC 192.27 219.02
B Reticulofenestra umbilicus >14 µm 42.5 42.5 14H-CC 192.27 219.02 15X-CC 254.60 289.73
T Tribrachiatus orthostylus 51.0 51.0 14H-CC 192.27 219.02 15X-CC 254.60 289.73
T Discoaster multiradiatus 53.0 53.0 15X-CC 254.6 289.73 16H-7, 22 262.21 298.92
B Sphenolithus radians 53.3 53.3 15X-CC 254.6 289.73 16H-7, 22 262.21 298.92
B Tribrachiatus orthostylus 53.4 53.4 15X-CC 254.6 289.73 16H-7, 22 262.21 298.92

Increase Zygrhablithus bijugatus

16H-CC 264.53 301.24 17H-CC 273.88 313.54
B Rhomboaster spp.

16H-CC 264.53 301.24 17H-CC 273.88 313.54
B Discoaster multiradiatus 56.2 56.2 19X-CC 291.72 334.75 20X-1, 125 316.25 362.53
B Discoaster mohleri 57.5 57.5 19X-CC 291.72 334.75 20X-1, 125 316.25 362.53
B Heliolithus kleinpellii 58.2 58.2 21X-1, 19 324.79 371.07 21X-1, 25 324.85 371.13
B Sphenolithus anarrhopus 58.4 58.4 21X-2, 20 326.30 372.58 21X-3, 28 327.88 374.16

Note: T = top, B = bottom.