Table T4. Distribution of main calcareous nannofossil species in Hole 1090B. Notes: Abundance abbreviations: D = dominant, A = abundant, C = common, F = few, R = rare, R* = almost barren, B = barren. Preservation abbreviations: G = good, M = moderate, P = poor. For more specific definitions, refer to the "Explanatory Notes" chapter. Information about taxon distribution is mainly centered upon stratigraphic intervals where events are identified. Leg Site Hole Core Type Section Sample top (cm) Sample bottom (cm) Depth (mbsf) Depth (mcd) Abundance Preservation Reticulofenestra umbilica Nannotetrina cristata Discoaster saipanensis Reticulofestra reticulata Reticulofenestra bisecta Chiasmolithus oamaruensis Reticulofenestra oamaruensis Ismolithus recurvus Chiasmolithus spp. Clausicoccus spp. Cyclicargolithus abisectus Cyclicargolithus floridanus Coccolithus miopelagicus Discoaster deflandreigr. Sphenolithus belemnos Sphenolithus belemnos-dissimilis Calcidiscus sp. Discoaster pentaradiatus Discoaster brouweri Reticulofenestra pseudoumbilicus Pseudoemiliania lacunosa Calcidiscus macintyrei Gephyrocapsa medium (4-5.5 micro-m) Gephyrocapsa large (>5.5 micro-m) Gephyrocapsa sp.3 Reticulofenestra asanoi Emiliania huxleyi Comment 177 1090 B 1 H 3 30 30 3.8 2.8 A G D 177 1090 B 1 H CC 20 25 4.2 4.2 A G C A 177 1090 B 2 H 1 130 130 5.8 5.5 A M C C 177 1090 B 2 H 2 30 30 6 6 A M A 177 1090 B 2 H 2 130 130 7 7 A M C ? 177 1090 B 2 H 4 30 30 7.5 9 A M 177 1090 B 2 H CC 0 10 13.8 13.8 A G 177 1090 B 3 H 1 40 40 14.1 15.85 A M 177 1090 B 3 H 1 130 130 15 16.75 A G F 177 1090 B 3 H 2 130 130 16.5 18.25 F G C 177 1090 B 3 H 3 130 130 18 19.75 A G C 177 1090 B 3 H 4 130 130 19.5 21.25 A M F 177 1090 B 3 H CC 13 18 22.28 24.03 A M A 177 1090 B 4 H 3 30 30 26.5 29.01 A M C 177 1090 B 4 H 3 130 130 27.5 30.01 A M C C 177 1090 B 4 H 4 130 130 29 31.51 A M C C 177 1090 B 4 H 5 30 30 29.5 32.01 A G C C F 177 1090 B 4 H 5 130 130 30.5 33.01 A M F F F 177 1090 B 4 H 6 30 30 31 33.51 A M C F C 177 1090 B 4 H CC 12 17 32.51 35.02 A M R F 177 1090 B 5 H 1 35 35 33.05 36.66 A G C 177 1090 B 5 H 1 130 130 34 37.61 A G A F A 177 1090 B 5 H 2 30 30 34.5 38.11 A G F F A 177 1090 B 5 H 2 130 130 35.5 39.11 A G C C C 177 1090 B 5 H 3 30 30 36 39.61 A G A F C 177 1090 B 5 H 3 110 110 36.8 40.41 A G C C 177 1090 B 5 H 4 30 30 37.5 40.81 A M A C 177 1090 B 5 H 4 130 130 38.5 41.81 A G A C 177 1090 B 5 H 5 30 30 39 42.31 A G A C 177 1090 B 5 H 5 130 130 40.3 43.31 A G C R R 177 1090 B 5 H 6 30 30 40.5 43.81 A G C F R 177 1090 B 5 H 6 130 130 41.5 44.81 A G C R 177 1090 B 5 H CC 14 19 41.4 45.01 A M R A F 177 1090 B 6 H 1 30 30 42.5 44.1 A M C R 177 1090 B 6 H 2 130 130 45 46.6 A M R C R 177 1090 B 6 H 6 130 130 51 52.6 A P R C 177 1090 B 6 H 7 30 30 51.5 53.1 A M R C 177 1090 B 6 H CC 9 14 51.84 53.44 A M R C 177 1090 B 7 H CC 12 17 59.29 65.59 A M R R C F 177 1090 B 8 H 1 30 30 61.5 65.21 A M R R F R 177 1090 B 8 H 1 120 120 62.4 66.11 A M F 177 1090 B 8 H 2 140 140 64.1 67.81 A M R R C R 177 1090 B 8 H 4 30 30 66 69.71 A M R 177 1090 B 8 H 5 30 30 67.5 71.21 A P A 177 1090 B 8 H CC 18 23 69.63 73.34 F P F 177 1090 B 9 H 3 140 140 75.1 78.79 A M F R F R 177 1090 B 9 H 5 30 30 77 80.69 A P F C R 177 1090 B 9 H 6 30 30 78.5 82.19 A P F C 177 1090 B 9 H 6 100 100 79.2 82.89 A P C R 177 1090 B 9 H CC 13 18 79.99 83.68 F P F F R 177 1090 B 10 H 1 140 140 81.6 86.17 A M C R R 177 1090 B 10 H 3 140 140 84.6 89.17 A P C R R 177 1090 B 10 H CC 19 24 88.41 92.98 C P R F F 177 1090 B 11 H 1 30 30 90 93.99 C P 177 1090 B 11 H 4 30 30 94.5 98.49 C P 177 1090 B 11 H CC 10 15 99.16 103.15 F P F F F 177 1090 B 12 H 2 30 30 101 104.67 A P 177 1090 B 12 H 5 130 130 106.5 110.17 A P F 177 1090 B 12 H CC 6 11 108.89 112.56 A M C F 177 1090 B 13 H 2 130 130 111.5 116.91 C P 177 1090 B 13 H 6 90 90 117.1 122.51 C P 177 1090 B 13 H CC 0 5 117.12 122.53 B 177 1090 B 14 H 2 30 30 120 123.65 C P 177 1090 B 14 H 5 130 130 125.5 129.15 A P 177 1090 B 14 H CC 0 5 127.51 131.16 C P ? C 177 1090 B 15 H 1 130 130 129 135.49 A P R A 177 1090 B 15 H 6 130 130 136.5 142.99 A M A C 177 1090 B 15 H CC 0 10 136.73 143.22 A M F C C 177 1090 B 16 H 1 30 30 137.5 144.15 C M C A F 177 1090 B 16 H 4 30 30 142 148.65 C M C A C F 177 1090 B 16 H 6 130 130 146 152.65 C P C R C 177 1090 B 16 H CC 0 10 146.75 153.4 C M F C F 177 1090 B 17 H 1 30 30 147 154.5 C P F C R 177 1090 B 17 H CC 14 24 154.36 161.86 B 177 1090 B 18 H CC 6 16 165.37 173.15 C P F C F 177 1090 B 19 H 1 30 30 166 175.49 C P A C 177 1090 B 19 H 1 120 120 166.9 176.39 B 177 1090 B 19 H 2 30 30 167.5 176.99 B 177 1090 B 19 H 2 130 130 168.5 177.99 B 177 1090 B 19 H 3 30 30 169 178.49 B 177 1090 B 19 H 3 130 130 170 179.49 F P R C F 177 1090 B 19 H 4 120 120 171.4 180.89 A M F C 177 1090 B 19 H 5 30 30 172 181.49 C P R C C R 177 1090 B 19 H 5 110 110 172.8 182.29 B 177 1090 B 19 H CC 24 34 173.14 182.63 A M F C F 177 1090 B 20 H 1 30 30 175.5 183.11 B F 177 1090 B 20 H 1 120 120 176.4 184.01 A M C F 177 1090 B 20 H 2 120 120 177.9 185.51 C M F R C 177 1090 B 20 H 3 120 120 179.4 187.01 C P C 177 1090 B 20 H 4 30 30 180 187.61 B 177 1090 B 20 H 4 120 120 180.9 188.51 B 177 1090 B 20 H 5 30 30 181.5 189.11 F P F 177 1090 B 20 H CC 22 32 184.42 192.03 A M F C 177 1090 B 21 X 1 30 30 185 193.05 A M R A R 177 1090 B 21 X 2 130 130 187.5 195.55 C P R R A 177 1090 B 21 X 3 30 30 188 196.05 C M R A C 177 1090 B 21 X 3 130 130 189 197.05 F P C F 177 1090 B 21 X 4 130 130 190.5 198.55 A M C R C 177 1090 B 21 X 6 30 30 192.5 200.55 F P F A 177 1090 B 21 X 6 130 130 193.5 201.55 B 177 1090 B 21 X 7 10 10 193.8 201.85 B 177 1090 B 21 X CC 15 25 194.09 202.14 B 177 1090 B 22 X 1 30 30 194.7 202.31 B 177 1090 B 22 X 1 130 130 195.7 203.31 B 177 1090 B 22 X 4 130 130 200.2 207.81 B 177 1090 B 22 X 6 130 130 203.2 210.81 B 177 1090 B 22 X CC 0 10 203.69 211.3 B 177 1090 B 23 X 1 30 30 204.4 212.8 C P C R 177 1090 B 23 X 2 30 30 205.9 214.3 A P C F 177 1090 B 23 X 4 30 30 208.9 217.3 A P C F F 177 1090 B 23 X 6 130 130 212.9 220.2 C P C 177 1090 B 23 X 7 30 30 213.4 220.7 A M C F C 177 1090 B 23 X 7 130 130 214.4 221.7 A M A A 177 1090 B 23 X CC 26 36 213.76 222.16 A M A F A F 177 1090 B 24 X 1 30 30 214.1 225.06 A M C C F 177 1090 B 24 X 1 130 130 215.1 226.06 A C A R C F F 177 1090 B 24 X 3 130 130 218.1 229.06 A M A C cf. C F C 177 1090 B 24 X 4 30 30 218.6 229.56 A M A C F R 177 1090 B 24 X 5 130 130 221.1 232.06 A M A F C R A 177 1090 B 24 X 7 10 10 222.9 233.86 A M A C C R F 177 1090 B 24 X CC 18 28 223.35 234.21 A M C F F A 177 1090 B 25 X CC 19 27 233.01 243.72 C P A A R R A F 177 1090 B 26 X 1 30 30 233.5 245.49 C M A F C F 177 1090 B 26 X CC 10 15 242.73 254.72 B 177 1090 B 27 X 4 120 120 248.6 260.59 F P A C C 177 1090 B 27 X 5 30 30 249.2 261.19 C P A C R C R 177 1090 B 27 X 5 120 120 250.1 262.09 C P A C F 177 1090 B 27 X 6 30 30 250.7 262.69 A P A R C R 177 1090 B 27 X CC 13 18 251.53 263.52 A P C F F C 177 1090 B 28 X CC 16 21 262.19 274.18 F P F F R R R 177 1090 B 29 X CC 17 22 271.87 283.86 C P F F F 177 1090 B 30 X CC 21 34 281.69 293.68 F P F F F 177 1090 B 31 X 1 120 120 282.9 294.89 C P A C A F 177 1090 B 31 X 2 120 120 284.4 296.39 A P A R C C R 177 1090 B 31 X 4 30 30 286.5 298.49 C P C C R 177 1090 B 31 X 4 130 130 287.5 299.49 A P C R C F R 177 1090 B 31 X 6 30 30 289.5 301.49 A P C R C C 177 1090 B 31 X 7 30 30 291 302.99 A M A F C R R R 177 1090 B 31 X CC 21 26 291.5 303.43 C M F F R F 177 1090 B 32 X CC 27 32 294.38 306.37 B 177 1090 B 33 X CC 13 18 297.73 309.39 F P F F R F 177 1090 B 35 X CC 17 20 319.91 331.9 A M C C F R 177 1090 B 36 X CC 26 34 330.12 342.11 R* P R R 177 1090 B 37 X CC 40 45 337.16 349.15 C P C R F R 177 1090 B 38 X 4 130 130 345.4 357.39 C M C F F 177 1090 B 38 X 7 10 10 348.7 360.69 C M C F R 177 1090 B 38 X CC 8 18 349.12 361.11 A M F R 177 1090 B 39 X 1 130 130 350.5 362.49 F P F 177 1090 B 39 X 2 130 130 352 363.99 C M C R ? 177 1090 B 39 X CC 12 22 358.78 370.77 A M F 177 1090 B 40 X CC 21 31 368.55 380.54 A M C R 177 1090 B 41 X CC 0 5 372.58 384.57 A M F 177 1090 B 42 X 1 30 30 378.4 390.39 A M F C 177 1090 B 42 X 1 120 120 379.3 391.29 C M F F 177 1090 B 42 X 3 30 30 381.4 393.39 C M C F 177 1090 B 42 X CC 22 27 387.5 399.49 C P R A 177 1090 B 43 X CC 29 39 397.59 409.58 A M R C