Initial Reports Volume 186 Chapter 4, Table T7. Distribution and relative abundances of selected diatom species, Site 1150. Note: NPD = North Pacific Diatom zones. Preservation: G = good; M = moderate; P = poor. Abundance: A = abundant; D = dominant; C = common; F = few; R = Rare; T = trace; r = reworking. Leg Hole Core Section Type Interval Top (cm) Bottom (cm) Depth (mbsf) Diatom zone NPD Geologic age Preservation Group abundance Actinocyclus curvatulus Actinocyclus ingens Actinocyclus oculatus Actinoptychus senarius Aulacoseira spp. Cavitatus jouseanus Cocconeis costata Coscinodiscus marginatus Coscinodiscus radiatus Crucidenticula nicobarica Delphineis simonsenii Delphineis surirella Denticulopsis dimorpha Denticulopsis hyalina Denticulopsis katayamae Denticulopsis lauta Denticulopsis praedimorpha Denticulopsis simonsenii Fragilariopsis doliolus Hemidiscus cuneiformis Koizumia tatsunokuchiensis Neodenticula kamtschatica Neodenticula koizumii Neodenticula seminae Nitzschia fossilis Nitzschia marina Nitzschia reinholdii Nitzschia rolandii Paralia sulcata Proboscia barboi Proboscia curvirostris Pyxidicula zabelinae Rouxia californica Stephanopyxis horridus Stephanopyxis turris Thalassionema nitzschioides Thalassionema schraderi Thalassiosira antiqua Thalassiosira eccentica Thalassiosira gravida Thalassiosira jouseae Thalassiosira latimarginata Thalassiosira nidulus Thalassiosira oestrupii Thalassiothrix longissima Chaetoceros spp. resting spores 186 1150 A 1 H CC 23 28 7.68 N. seminae 12 Pleistocene M A F D r R r r F r R C C C 186 1150 A 2 H CC 22 27 17.69 N. seminae 12 Pleistocene G A R C R C A C C C F 186 1150 A 3 H CC 40 45 27.45 N. seminae 12 Pleistocene G C F F F F C F F F C 186 1150 A 4 H CC 23 28 36.65 N. seminae 12 Pleistocene M C F C C C C C C 186 1150 A 5 H CC 24 29 46.33 N. seminae 12 Pleistocene G C F F F C R F R C C R F F 186 1150 A 6 H CC 39 44 55.73 N. seminae 12 Pleistocene G C r R R R r r C R R R R C C 186 1150 A 7 H 4 65 69 60.35 P. cuvirostris 11 Pleistocene G A R C R F R R F F F F 186 1150 A 7 H CC 25 30 65.30 P. cuvirostris 11 Pleistocene G A R R T R F R R R F F F C R C F 186 1150 A 8 H CC 5 10 74.45 P. cuvirostris 11 Pleistocene G C R R R C F T F F C 186 1150 A 9 H CC 48 53 84.53 P. cuvirostris 11 Pleistocene M A T C R R R R F C R C 186 1150 A 10 H CC 33 38 94.09 P. cuvirostris 11 Pleistocene G A R R R F F C F R R F R R C 186 1150 A 11 H CC 24 29 102.66 P. cuvirostris 11 Pleistocene M C C R C F C R R R 186 1150 A 12 H 1 140 144 104.10 A. oculatus 10 Pleistocene G C R R F R R F R R R F F 186 1150 A 12 H 3 69 72 106.02 A. oculatus 10 Pleistocene G A R C T R R F R R F R R C 186 1150 A 12 H 5 68 72 109.01 A. oculatus 10 Pleistocene G A F R F C R R C R R C C 186 1150 A 12 H CC 38 43 112.15 A. oculatus 10 Pleistocene M C C A F F C F C 186 1150 A 13 X 1 140 144 113.60 A. oculatus 10 Pleistocene G F F R R T R T R F 186 1150 A 13 X 3 140 144 116.60 A. oculatus 10 Pleistocene G A R r C C R R F R R C 186 1150 A 13 X CC 9 14 117.37 A. oculatus 10 late Pliocene G A R R F R R r C R R R F F F 186 1150 A 14 X 3 70 72 120.10 A. oculatus 10 late Pliocene G C F C R T R T F T C 186 1150 A 14 X 5 71 73 123.11 N. koizumii 9 late Pliocene G A F R F C F R F R R C T C 186 1150 A 14 X CC 18 23 124.71 N. koizumii 9 late Pliocene G C F R F R C F R R F F R 186 1150 A 15 X CC 20 23 130.20 N. koizumii 9 late Pliocene M C R R T R F C F C C C 186 1150 A 16 X CC 18 23 139.58 N. koizumii 9 late Pliocene G A C C F F A F R R F R C R R C 186 1150 A 17 X CC 17 22 154.53 N. koizumii 9 late Pliocene G A R C A C R R F F F F A 186 1150 A 18 X CC 41 46 162.11 N. koizumii 9 late Pliocene M C R R C T R R F F C 186 1150 A 20 X CC 0 1 174.00 N. koizumii 9 late Pliocene G A R F A R R C F C R C 186 1150 A 21 X CC 9 14 192.01 N. koizumii 9 late Pliocene G A R C R C F F C F F F C 186 1150 A 22 X 3 140 144 197.70 N. koizumii-N. kamtschatica 8 late Pliocene G A R F C R F F F R R 186 1150 A 22 X CC 24 29 202.94 N. koizumii-N. kamtschatica 8 late Pliocene G A F r r R C C R F C F F F R F R 186 1150 A 23 X CC 20 25 212.84 N. koizumii-N. kamtschatica 8 late Pliocene G A F R F A C F F C R 186 1150 A 24 X CC 8 13 213.22 N. koizumii-N. kamtschatica 8 late Pliocene M C R C R A R R R C F R 186 1150 A 25 X CC 55 60 232.14 N. koizumii-N. kamtschatica 8 late Pliocene G A R F R A C R R R F R 186 1150 A 26 X CC 13 18 239.55 N. koizumii-N. kamtschatica 8 late Pliocene G A R C A R R F F R 186 1150 A 27 X CC 27 32 251.16 N. koizumii-N. kamtschatica 8 late Pliocene G A R F R A R R C R R C F 186 1150 A 28 X CC 29 34 260.33 N. koizumii-N. kamtschatica 8 late Pliocene G A R R F C R F R C R F 186 1150 A 29 X 3 63 67 264.43 T. oestrupii 7Bb late Pliocene M C r C R C T F F F R R R C 186 1150 A 29 X CC 17 22 269.34 T. oestrupii 7Bb early Pliocene G A R R A C F F F F C R 186 1150 A 30 X CC 30 35 280.11 T. oestrupii 7Bb early Pliocene M A F F A R R C R R R F F 186 1150 A 31 X CC 51 56 289.80 T. oestrupii 7Bb early Pliocene M A F A F T R C R F F F 186 1150 A 32 X CC 25 30 298.83 T. oestrupii 7Bb early Pliocene G C R C C R C R F R C F 186 1150 A 33 X CC 9 14 305.57 T. oestrupii 7Bb early Pliocene G A R T C F C F C R F F F C 186 1150 A 34 X CC 26 31 318.94 T. oestrupii 7Bb early Pliocene G A C R C r A C F F R F C C F 186 1150 A 35 X CC 37 42 328.85 T. oestrupii 7Bb early Pliocene G A C A F F F F R R F 186 1150 A 36 X CC 31 37 338.43 T. oestrupii 7Bb early Pliocene G A R R A C R F R R F C 186 1150 A 37 X CC 27 32 347.37 T. oestrupii 7Bb early Pliocene G C R A C C C R R R T F 186 1150 A 38 X CC 24 29 357.39 T. oestrupii 7Bb early Pliocene G C R C A C F R C R 186 1150 A 39 X CC 33 38 366.98 T. oestrupii 7Bb early Pliocene M C R F R C R C R F R F F 186 1150 A 40 X CC 17 22 376.41 T. oestrupii 7Bb early Pliocene M C F F r C C R R F C R 186 1150 A 41 X CC 22 27 378.61 T. oestrupii 7Bb early Pliocene M C R R C r R C R C F F R 186 1150 A 42 X CC 37 42 395.62 T. oestrupii 7Bb early Pliocene G A F C F A R F R R R F F 186 1150 A 43 X CC 38 43 405.28 T. oestrupii 7Bb early Pliocene G A F A C F A C R R F R 186 1150 A 44 X CC 46 50 414.48 T. oestrupii 7Bb early Pliocene M C R R F R R C T F F R 186 1150 A 45 X CC 13 16 424.33 T. oestrupii 7Bb early Pliocene G A F C A R F C F R F T 186 1150 A 46 X CC 28 31 428.83 T. oestrupii 7Bb early Pliocene M A F A R F C F R R 186 1150 A 47 X CC 18 21 443.68 T. oestrupii 7Bb early Pliocene G A R C R R C R R C A F R 186 1150 A 48 X CC 41 44 453.35 T. oestrupii 7Bb late Miocene M A F R F C F C C F F R 186 1150 A 49 X CC 48 53 463.14 T. oestrupii 7Bb late Miocene M A R C R F A F C C R F F 186 1150 A 50 X CC 9 14 462.99 T. oestrupii 7Bb late Miocene M R R R R 186 1150 A 51 X CC 26 31 480.58 T. oestrupii 7Bb late Miocene M R R R R 186 1150 A 52 X CC 20 25 482.50 T. oestrupii 7Bb late Miocene G A R C F C R F R R F R R R 186 1150 A 53 X CC 25 30 492.25 T. oestrupii 7Bb late Miocene M C C F R C R R R R R R R C 186 1150 A 54 X CC 31 34 511.46 T. oestrupii 7Bb late Miocene G A r R C F R R C R R F C F F R R F 186 1150 A 55 X CC 35 40 520.80 T. oestrupii 7Bb late Miocene G A F C R A R C R F 186 1150 A 56 X CC 30 35 527.49 T. oestrupii 7Bb late Miocene G C C A F F R R R R F 186 1150 A 57 X 1 70 74 531.30 N. kamtschatica 7Ba late Miocene G A C F C T R F R F 186 1150 A 57 X CC 15 20 531.67 N. kamtschatica 7Ba late Miocene G A R C R C R F F F F R 186 1150 A 58 X CC 20 25 540.50 N. kamtschatica 7Ba late Miocene M C R R C R C R F F F 186 1150 A 60 X CC 30 33 563.74 N. kamtschatica 7Ba late Miocene M C R C R C R R R R 186 1150 A 61 X CC 25 30 571.58 N. kamtschatica 7Ba late Miocene M C T F C F F F R 186 1150 A 62 X CC 47 50 588.49 N. kamtschatica 7Ba late Miocene M A R C F R C F R F F 186 1150 A 63 X CC 28 31 589.91 N. kamtschatica 7Ba late Miocene M A R A R A R F R R 186 1150 A 64 X CC 23 26 601.35 N. kamtschatica 7Ba late Miocene G C R F C R F C R R 186 1150 A 65 X CC 36 39 609.96 N. kamtschatica 7Ba late Miocene M C F R C C R R F R R 186 1150 A 66 X CC 24 29 627.05 N. kamtschatica 7Ba late Miocene M C C r C R F F R R R 186 1150 A 67 X CC 37 42 636.73 N. kamtschatica 7Ba late Miocene G A R A R C R F 186 1150 A 68 X CC 38 41 645.68 N. kamtschatica 7Ba late Miocene G A C C C R A F F 186 1150 A 69 X CC 29 34 655.49 N. kamtschatica 7Ba late Miocene M C R F A R F C F 186 1150 A 70 X CC 26 31 663.16 N. kamtschatica 7Ba late Miocene G C r R R R A F F F 186 1150 A 71 X CC 19 24 674.46 N. kamtschatica 7Ba late Miocene G A F F R C A R F F R R F 186 1150 A 72 X CC 31 36 684.23 N. kamtschatica 7Ba late Miocene G A F F R C F R F R R 186 1150 A 73 X CC 28 33 686.55 N. kamtschatica 7Ba late Miocene G A R A R C F R R F 186 1150 A 74 X CC 26 31 702.84 N. kamtschatica 7Ba late Miocene G A R R A R R A R R 186 1150 A 75 X CC 38 43 713.12 N. kamtschatica 7Ba late Miocene G C F F R A R R 186 1150 A 76 X CC 42 47 722.85 N. kamtschatica 7Ba late Miocene G C F C C R F R R F N. kamtschatica 7Ba late Miocene 186 1150 B 1 R CC 18 20 708.22 N. kamtschatica 7Ba late Miocene G A R R R r C R F R R F 186 1150 B 2 R CC 20 23 711.93 N. kamtschatica 7Ba late Miocene G C R A R F R 186 1150 B 3 R CC 15 17 720.11 N. kamtschatica 7Ba late Miocene G A R R R C R F F F C 186 1150 B 4 R CC 22 25 732.49 N. kamtschatica 7Ba late Miocene G A F C A F F R R F 186 1150 B 5 R CC 11 13 740.07 N. kamtschatica 7Ba late Miocene G A R C R C F F F R R R 186 1150 B 6 R CC 15 17 756.54 N. kamtschatica 7Ba late Miocene G A F R C C R R F C R R 186 1150 B 7 R 1 143 145 759.33 N. kamtschatica 7Ba late Miocene G A F R C R R F R F 186 1150 B 8 R CC 13 16 770.05 N. kamtschatica 7Ba late Miocene M A R F C R F C R R 186 1150 B 9 R CC 24 27 781.47 N. kamtschatica 7Ba late Miocene G C F R F R R F F R R 186 1150 B 10 R CC 12 15 791.04 N. kamtschatica 7Ba late Miocene M C R R r F R F F F R 186 1150 B 11 R CC 18 21 802.82 N. kamtschatica 7Ba late Miocene G C C F F F R R T 186 1150 B 12 R CC 8 13 811.91 N. kamtschatica 7Ba late Miocene M F F F R R R F T 186 1150 B 13 R CC 0 3 819.78 N. kamtschatica 7Ba late Miocene M C R C r R R T R R 186 1150 B 14 R CC 20 23 830.48 N. kamtschatica 7Ba late Miocene G A C F R F R R R 186 1150 B 15 R CC 21 26 837.15 N. kamtschatica 7Ba late Miocene M F R R F F F 186 1150 B 16 R CC 15 18 852.22 N. kamtschatica 7Ba late Miocene G A A C F F R R C F 186 1150 B 17 R CC 0 3 859.53 N. kamtschatica 7Ba late Miocene M C F r R R F R 186 1150 B 18 R CC 16 19 868.08 N. kamtschatica 7Ba late Miocene G C R R r r F R R R F F 186 1150 B 19 R CC 19 21 877.53 N. kamtschatica 7Ba late Miocene G A R R R F R r C F R F 186 1150 B 20 R CC 15 17 893.02 N. kamtschatica 7Ba late Miocene M C R R F T r F F F C R 186 1150 B 21 R 3 70 72 896.44 N. kamtschatica 7A late Miocene M C R R T T F R F R 186 1150 B 21 R CC 0 2 898.32 N. kamtschatica 7A late Miocene G C F C r C R F R F R C T R 186 1150 B 22 R CC 13 15 910.67 N. kamtschatica 7A late Miocene M C R R R R R F F R F R 186 1150 B 23 R CC 20 23 919.73 N. kamtschatica 7A late Miocene G A F R R R C R F 186 1150 B 24 R CC 0 3 923.46 N. kamtschatica 7A late Miocene G A R C R R F T F F R F 186 1150 B 25 R CC 0 3 939.07 N. kamtschatica 7A late Miocene G A R F C F R F R R F F R C 186 1150 B 26 R 5 146 147 948.00 N. kamtschatica 7A late Miocene G C F F r R R R R C R R C 186 1150 B 27 R CC 0 2 957.41 N. kamtschatica 7A late Miocene M C R C F r R R C R F 186 1150 B 28 R CC 23 26 968.83 N. kamtschatica 7A late Miocene G C R R F F F R R R C R C 186 1150 B 29 R 3 75 78 972.88 R. californica 7A late Miocene G C R T R C R F r T F 186 1150 B 29 R CC 21 25 978.02 R. californica 7A late Miocene M C F F R r R R R R C R C 186 1150 B 30 R CC 12 15 987.85 R. californica 7A late Miocene M F F F F r R R C 186 1150 B 31 R CC 14 19 992.31 R. californica 7A late Miocene M F R C r R R R F 186 1150 B 32 R 1 60 63 998.90 T. schraderi 6B late Miocene M C T C F T T F R R F 186 1150 B 32 R CC 22 25 1007.82 T. schraderi 6B late Miocene M C R C F R F R F R 186 1150 B 33 R CC 20 23 1009.47 T. schraderi 6B late Miocene M A F A r R R R R C R R R C 186 1150 B 34 R CC 12 15 1019.99 T. schraderi 6B late Miocene G A R F R r r F F C F F 186 1150 B 35 R CC 0 3 1031.50 T. schraderi 6B late Miocene M C R R R C r F R R F F R 186 1150 B 36 R CC 20 23 1044.73 T. schraderi 6B late Miocene G F C F F C R 186 1150 B 37 R CC 24 27 1050.51 T. schraderi 6B late Miocene M F R R F r r R F R 186 1150 B 38 R CC 19 22 1058.56 T. schraderi 6B late Miocene M C F C R R R F C F F 186 1150 B 39 R CC 20 22 1070.80 T. schraderi 6B late Miocene P F C F R F 186 1150 B 40 R CC 21 23 1079.21 T. schraderi 6B late Miocene M C F R R R R R R F 186 1150 B 41 R 1 68 71 1085.98 D. katayamae 6A late Miocene M F F F R R R T R F 186 1150 B 41 R CC 28 30 1094.47 D. katayamae 6A late Miocene M C R R F R R R F F 186 1150 B 42 R 1 73 75 1095.63 D. katayamae 6A late Miocene M C R C r R r R R T F 186 1150 B 42 R CC 21 23 1103.87 D. katayamae 6A late Miocene M C F R F C F F F 186 1150 B 43 R 1 69 71 1105.29 D. katayamae 6A late Miocene G C T T C F R C F 186 1150 B 43 R 3 71 72 1108.26 D. dimorpha 5D late Miocene M C F C R R F T F 186 1150 B 43 R CC 18 21 1111.28 D. dimorpha 5D late Miocene M C F F R R C R C R 186 1150 B 44 R 1 72 74 1114.92 D. dimorpha 5D late Miocene M C C T F F F T F 186 1150 B 44 R CC 15 18 1115.76 D. dimorpha 5D late Miocene G C R R r F C C F R R 186 1150 B 45 R CC 21 24 1129.85 D. dimorpha 5D late Miocene M C F R r F R R C R 186 1150 B 46 R CC 18 21 1138.94 D. dimorpha 5D late Miocene G A R R F r F R C R R R 186 1150 B 47 R CC 22 26 1147.36 D. dimorpha 5D late Miocene M C R F F C R R 186 1150 B 48 R CC 20 25 1157.71 D. dimorpha 5D late Miocene M C F R F R R F R F 186 1150 B 49 R CC 15 17 1170.57 D. dimorpha 5D late Miocene G A F R F r R F R R 186 1150 B 50 R CC 10 12 1180.23 D. dimorpha 5D late Miocene M A C F R R F F F