Table T8. Distribution and relative abundances of selected diatom species, Holes 1151C and 1151D. Note: NPD = North Pacific diatom zones, G = good, M = moderate, A = abundant, R = rare, C = common, F = few, r = reworking, T = trace. Leg Site Hole Core Type Section Top (cm) Bottom (cm) Depth (mbsf) Diatom zones NPD Preservation Group abundance Actinocyclus curvatulus Actinocyclus oculatus Actinoptychus senarius Azpeitia nodulifera Bacterosira fragilis Coscinodiscus marginatus Denticulopsis katayamae Denticulopsis simonsenii Fragilariopsis doliolus Neodenticula koizumii Neodenticula kamtschatica Neodenticula seminae Nitzschia reinholdii Paralia sulcata Proboscia barboi Proboscia curvirostris Rhizosolenia hebetata Stephanopyxis turris Thalassionema nitzschioides Thalassiosira antiqua Thalassiosira gravida Thalassiosira jouseae Thalassiosira latimarginata Thalassiosira lineata Thalassiosira oestrupii Thalassiothrix longissima Chaetoceros spp. (resting spores) 186 1151 C 1 H CC 13 18 2.10 N. seminae 12 G A R C R F F R R R C 186 1151 C 2 H CC 23 28 12.10 N. seminae 12 G C F R C R F F r R R R 186 1151 C 3 H CC 20 25 21.44 N. seminae 12 G A F F C F F F F R A 186 1151 C 4 H 4 70 70 26.43 P. curvirostris 11 M A R R R R R C R R F 186 1151 C 4 H CC 39 44 31.58 P. curvirostris 11 G A R r T F F R R F F T C 186 1151 C 5 H CC 8 13 40.31 P. curvirostris 11 G A R R R r C F R F R R C 186 1151 C 6 H CC 13 18 50.10 P. curvirostris 11 G A R R T F R F C T R C 186 1151 C 7 H CC 15 20 59.46 P. curvirostris 11 G A R T R C R R C F C 186 1151 C 8 H CC 27 32 69.30 P. curvirostris 11 M C T F R F F F R F 186 1151 C 9 H 5 70 70 75.40 P. curvirostris 11 G C R R r R T R F F R F 186 1151 C 9 H CC 19 24 78.38 A. oculatus 10 G A R F R R r F T R F F F R R C 186 1151 C 10 H CC 29 34 88.38 A. oculatus 10 G A C R F R R R R F F F 186 1151 C 11 H 4 70 70 92.90 A. oculatus 10 G A R F C R T F F F F F 186 1151 C 11 H CC 13 18 97.55 N. koizumii 9 G A F R F C R T R R F F R C 186 1151 D 1 H CC 25 30 7.51 N. seminae 12 G A R T F C F F R F R R R F 186 1151 D 2 H CC 23 28 17.44 N. seminae 12 G A F F F F R C R R R R F 186 1151 D 3 H 4 70 70 22.20 N. seminae 12 G C R F R R F T F 186 1151 D 3 H CC 25 30 26.88 P. curvirostris 11 G C T R r R R T R F F T R R C 186 1151 D 4 H CC 24 28 36.42 P. curvirostris 11 G A R R R F R R F C F R R A 186 1151 D 5 H CC 23 28 45.71 P. curvirostris 11 G C R R R T R F R F F F 186 1151 D 6 H CC 23 28 55.37 P. curvirostris 11 G C T F R R R F F R C 186 1151 D 7 H CC 7 12 64.56 P. curvirostris 11 G A F C R R F F R R C 186 1151 D 8 H CC 24 29 74.63 P. curvirostris 11 G A R F C F R F F R F R F 186 1151 D 9 H CC 24 28 83.43 A. oculatus 10 G A F R F R F F T R F 186 1151 D 10 H CC 16 20 93.27 N. koizumii 9 G C R F T F F R R F R F T R C