Table T8. Diatom, silicoflagellate, ebridian, Actiniscus, sponge spicule, and opaline phytolith occurrence in uncleaned and acid-cleaned smear slides investigated from Site 1092. Notes: Abundance abbreviations: A = abundant, C = common, F = few, R = rare, T = trace, X = present, B = barren. Preservation abbreviations: G = good, M = moderate, P = poor. For more specific definitions, refer to the "Explanatory Notes" chapter. Leg Site Hole Core Type Section Interval top (cm) Interval bottom (cm) Depth Depth Diatom abundance (uncleaned) Diatom abundance (acid-cleaned) Diatom preservation Silicoflagellate occurrence Ebridian occurrrence Actiniscus occurrence Sponge spicule occurrence Opaline phytolith occurrence Actinocyclus praeactinochilus Actinocyclus curvatulus Actinocyclus fasciculatus Actinocyclus ingens Actinocyclus ingens var. nodus Actinocyclus ingens var. ovalis Actinocyclus karstenii Actinoptychus senarius Asteromphalus hookeri Asteromphalus kennettii Asteromphalus parvulus Azpeitia nodulifer Azpeitia tabularis Bogorovia puncticulata Cavitatus linearis Cavitatus miocenicus Chaetoceros spp. Coscinodiscus marginatus Coscinodiscus rhombicus Crucidenticula aff. sawamurae Denticulopsis dimorpha Denticulopsis hustedtii Denticulopsis lauta (oval) Denticulopsis maccollumii Denticulopsis praedimorpha Ethmodiscus rex Eucampia antarctica Fragilariopsis angulata Fragilariopsis arcula Fragilariopsis aurica Fragilariopsis barronii Fragilariopsis clementia Fragilariopsis fossilis Fragilariopsis cf. Fossilis Fragilariopsis interfrigidaria Fragilariopsis kerguelensis Fragilariopsis maleinterpretaria Fragilariopsis matuyamae F. matuyamae var. heteropolara Fragilariopsis praecurta Fragilariopsis praeinterfrigidaria Fragilariopsis reinholdii Fragilariopsis separanda Fragilariopsis weaveri Fragilariopsis sp. A (Gersonde, 1991) Hemidiscus cuneiformis Hemidiscus karstenii Hemidiscus triangularus Hemidiscus sp. 2 (Gersonde and Burckle, 1991) Neobrunia mirabilis Nitzschia cylindrica Nitzschia pliocena Proboscia barboi Raphidodiscus marylandicus Rhizosolenia antennata fo. semispina Rhizosolenia hebetata fo. semispina Rouxia heteropolara Rouxia heteropolara var. A Rouxia isopolica Rouxia naviculoides Stephanopyxis turris Thalassionema nitzschioides Thalassionema nitzschioides fo. 1 Thalassionema nitzschioides var. parva Thalassionema sp. 1 Thalassiosira complicata Thalassiosira convexa Thalassiosira elliptipora Thalassiosira fraga Thalassiosira gracilis Thalassiosira insigna Thalassiosira inura Thalassiosira kolbei Thalassiosira lentiginosa Thalassiosira mahoodii Thalassiosira miocenica Thalassiosira oestrupii Thalassiosira oliverana Thalassiosira oliverana var. sparsa Thalassiosira praeconvexa Thalassiosira tetraoestrupii var. reimeri Thalassiosira vulnifica Thallassiothrix antarctica-longissima gr. Diatom zone Diatom age (Ma) 177 1092 A 1 H 1 30 30 0.3 2.85 R M B B B B B F C C R T. lentiginosa 0-0.65 177 1092 A 1 H 2 1 1 1.5 4.05 A G T B B B B R R R D C F T. lentiginosa 0-0.65 177 1092 A 1 H 3 1 1 3 5.55 C M B B B B B F R A F F middle/upper A. ingens 0.65-1.3 177 1092 A 1 H CC 7 12 8 10.55 A M T B B B B F T R F T R F C middle/upper A. ingens 0.65-1.3 177 1092 A 2 H 3 1 1 11 14.62 A G T B B B B R R F C R F middle/upper A. ingens 0.65-1.3 177 1092 A 2 H 5 1 1 14 17.62 A G R B B B B F R F A R R C middle/upper A. ingens 0.65-1.3 177 1092 A 2 H CC 9 14 16.11 19.73 A G-M T B B B B A F R F middle/upper A. ingens 0.65-1.3 177 1092 A 3 H 2 1 1 19 23.73 A G T B B B B R R R F C R R C lower A. ingens 1.3-1.8 177 1092 A 3 H 5 1 1 23.5 28.23 A M T B B B B D R R F R R R R lower A. ingens 1.3-1.8 177 1092 A 3 H CC 9 14 26.24 30.97 A G-M F B B B B A R C F R F F lower A. ingens 1.3-1.8 177 1092 A 4 H 1 1 1 27 31.87 F M B B B B B C F F R R R R F lower A. ingens 1.3-1.8 177 1092 A 4 H 3 1 1 30 34.87 C M R B B B B C F C R R F R F F lower A. ingens 1.3-1.8 177 1092 A 4 H 4 1 1 31.5 36.37 A M R B B B B A C F R R R R F P. barboi 1.8-2.0 177 1092 A 4 H 5 1 1 33 37.87 C M R B B B B C R X F R C F F R F P. barboi 1.8-2.0 177 1092 A 4 H 6 1 1 34.5 39.37 C M R B B B B C F R C R R R F T. kolbei/F. matuyamae 2.0-2.5 177 1092 A 4 H 7 1 1 35.95 40.82 F M-P R B B B B C R F F R R F T. kolbei/F. matuyamae 2.0-2.5 177 1092 A 4 H CC 9 14 36.69 41.56 A M T B B B B F F R C R R R F-R F T. kolbei/F. matuyamae 2.0-2.5 177 1092 A 5 H 1 1 1 36.5 42.37 F M-P B B B B B F R F R R F R R F R A R T. kolbei/F. matuyamae 2.0-2.5 177 1092 A 5 H 4 1 1 41 46.87 C M R B B B B R R R R R C R R R R R F R F C T. kolbei/F. matuyamae 2.0-2.5 177 1092 A 5 H 5 1 1 42.5 48.37 F P B B B B B R X F F R R R F C R T. kolbei/F. matuyamae 2.0-2.5 177 1092 A 5 H 6 1 1 44 49.87 F M B B B B B C F R R F R R T. vulnifica 2.5-2.6 177 1092 A 5 H CC 10 15 45.65 51.52 A M B B B B B F T C T T C T R R F T. insigna 2.6-3.3 177 1092 A 6 H 1 1 1 46 53.89 F M T B B B B R R R C F R R F T. insigna 2.6-3.3 177 1092 A 6 H 2 1 1 47.5 55.39 F M-P B B B B B F F R R R-F R R R F F F F R R F. interfrigidaria 3.3-3.8 177 1092 A 6 H 3 1 1 49 56.89 F M R B B B B F C R R R R F. interfrigidaria 3.3-3.8 177 1092 A 6 H 5 1 1 52 59.89 F G-M R B B B B R R R F R C R R R R R F. interfrigidaria 3.3-3.8 177 1092 A 6 H 6 1 1 53.5 61.39 F M B B B B B R R C R R R R F R R F. interfrigidaria 3.3-3.8 177 1092 A 6 H CC 0 10 54.83 62.72 A M B B B B B F R T F C R R R C F. interfrigidaria 3.3-3.8 177 1092 A 7 H 1 1 1 55.5 64.19 R P B B B B B X X X X X X X X F. interfrigidaria 3.3-3.8 177 1092 A 7 H 1 120 122 56.7 65.39 C M R B X B B R R R R F R R F R F R T R T. inura 4.4-4.9 177 1092 A 7 H 3 1 1 58.5 67.19 C G-M T B B B B R T R C F R C R R C R R C R R F T. inura 4.4-4.9 177 1092 A 7 H 4 1 1 60 68.69 C M T B B B B R F R F F R R C R R F ? ? 177 1092 A 7 H 5 1 1 61.5 70.19 A G T B B B B R F F R F R F C R R F ? ? 177 1092 A 7 H 6 1 1 63 71.69 A G T B B B B A R R R R R R C R R F F. reinholdii 5.6-6.4 177 1092 A 7 H 7 1 1 64.3 72.99 F M T B B B B R A R R R R F F F R R F. reinholdii 5.6-6.4 177 1092 A 7 H CC 15 20 64.82 73.51 A G-M B B B B B C T F F T R T F R F. reinholdii 5.6-6.4 177 1092 A 8 H 1 120 122 66.2 75.65 A G B B B B B R R R R F F R F X F F F R F F. reinholdii 5.6-6.4 177 1092 A 8 H 4 71 73 70.21 79.66 A-C G B B B B B R R R F C R R R X R R F F F F F. reinholdii 5.6-6.4 177 1092 A 8 H CC 11 16 73.68 83.13 R-T M-P B B B B B X X X F. reinholdii 5.6-6.4 177 1092 A 9 H 2 71 73 76.71 86.04 C M-P B B B B B R A R F R F C R F. reinholdii 5.6-6.4 177 1092 A 9 H 3 1 1 77.45 86.78 R B B B B B X X X X X A. ingens var. ovalis 6.4-8.7 177 1092 A 9 H CC 10 15 83.92 93.25 T P B B B B B X ? 177 1092 A 10 H 1 73 75 84.73 95.27 R P B B B B B X X ? ? 177 1092 A 10 H 5 73 75 90.73 101.27 F M-P T B B B B C R F F F R F ? ? 177 1092 A 10 H CC 15 20 93.45 103.99 R M B B B B B X X X X X Late Miocene 177 1092 A 11 H 2 89 91 95.89 108.38 F P R B B B B R C F F C R F ? ? 177 1092 A 11 H 5 71 75 100.21 112.7 C M T B B B B R F C F R F F A. kennettii 9.0-10.2 177 1092 A 11 H CC 0 10 102.77 115.26 T B B B B B X X ? 177 1092 A 12 H 1 73 75 103.73 116.14 F M-P B B B B B R C F R R F R F A. kennettii 9.0-10.2 177 1092 A 12 H 5 71 73 109.66 122.07 F P B B B B B R R C R F F F R A. kennettii 9.0-10.2 177 1092 A 12 H CC 28 33 113.03 125.44 T B B B B B X X X 177 1092 A 13 H 2 69 71 114.69 128.91 C M T B B B B R R F F X R A A. kennettii 9.0-10.2 177 1092 A 13 H 6 71 73 120.71 134.93 F M-P T B B B B A T R R R R A. kennettii 9.0-10.2 177 1092 A 13 H CC 10 15 121.55 135.77 R M-P B B B B B X X X 177 1092 A 14 H 1 118 120 123.18 139.3 A-C M R B B B B D R R R R D. hustedtii 10.2-10.6 177 1092 A 14 H 5 120 122 129.2 145.32 C M B B B B B A R R R X R D. hustedtii 10.2-10.6 177 1092 A 14 H CC 10 15 131.11 147.23 F-R M-P B B B B B F R F C Late Miocene 177 1092 A 15 H 5 120 122 138.7 156.94 C M-P B B B B B C F A R late D. dimorpha 10.6-10.9 177 1092 A 15 H CC 14 19 141.04 159.28 R-T M B B B B B X X X X Late Miocene 177 1092 A 16 H 5 120 123 148.2 167.38 C M B B B B B F F D R late D. dimorpha 10.6-10.9 177 1092 A 16 H CC 14 19 149.91 169.09 T B B B B B X X Late Miocene 177 1092 A 17 H 3 116 119 154.09 172.31 F M-P T B B B B F A R D. dimorpha 10.6-11.7 177 1092 A 17 H 5 116 119 157.09 175.31 T B B B X B 177 1092 A 17 H CC 32 37 158.51 176.73 B B B B B B 177 1092 A 18 H 1 120 123 161.2 181.05 R P B B B B B X X X X N. dentic.+D. hust./N. grossep. 12.8-14.2 177 1092 A 18 H 5 120 123 167.2 187.05 T P B B B B B X X A. ingens var. nodus 14.2-14.4 177 1092 A 18 H CC 0 7 168.5 188.35 T B B B B B X ? 177 1092 A 19 H 1 65 68 170.15 192.49 F M-P B B B B B A R R A. ingens/D. maccollumii 15.4-16.2 177 1092 A 19 H 2 65 68 171.65 193.99 F P B B B B B R F F-C X R D. maccollumii 16.2-16.8 177 1092 A 19 H 5 65 68 176.15 198.49 R M B B B B B X X X X X X unzoned Early/middle Miocene 177 1092 A 19 H CC 72 77 178.63 200.97 B 177 1092 A 20 H 1 66 69 179.66 202 F M R B X B B F C R R F T. fraga 17.7-20.8 177 1092 A 20 H 6 66 69 187.16 209.5 F M-P R B B B B R R T F R R R T. fraga 17.7-20.8 177 1092 A 20 H CC 13 18 188.35 210.69 T B B B B B X ? 177 1092 B 1 H 1 60 60 0.6 1.15 A G T B B B B F R A C R F T. lentiginosa 0-0.65 177 1092 B 1 H 2 22 22 1.72 2.27 A G T B B B B R F A F F R F T. lentiginosa 0-0.65 177 1092 B 1 H 2 28 28 1.78 2.33 R P B B B B B X X X T. lentiginosa 0-0.65 177 1092 B 1 H 3 10 10 3.1 3.65 A G T B B B B R F D C R F T. lentiginosa 0-0.65 177 1092 B 1 H 4 75 75 5.25 5.8 A G T B B B B R C A C F middle/upper A. ingens 0.65-1.3 177 1092 B 1 H CC 0 7 7.35 7.9 A M T B B B B F R T A F R R R C middle/upper A. ingens 0.65-1.3 177 1092 B 2 H CC 6 11 16.66 17.51 A M T B B B B A R C T F F middle/upper A. ingens 0.65-1.3 177 1092 B 3 H CC 7 14 24.44 25.68 A G-M T B B B B C R T C F R R R F lower A. ingens 1.3-1.8 177 1092 B 4 H CC 5 10 35.82 37.03 A M R B B B B A F F F T R R R F P. barboi 1.8-2.0 177 1092 B 5 H CC 0 10 44.9 47.07 C M R B X B B R R C R R F R F F F T. kolbei/F. matuyamae 2.0-2.5 177 1092 B 6 H CC 11 16 52.36 56.15 F M B B X B B R R C R R R R R C F. interfrigidaria 3.3-3.8 177 1092 B 7 H CC 0 10 55.56 58.21 C-F M R B X B B R R X R C R R R R C F. interfrigidaria 3.3-3.8 177 1092 B 8 H CC 9 14 74.16 80.11 C-F M B B B B B R R R X R R R R R F F ? 177 1092 B 9 H CC 17 22 82.53 88.51 T B B B B B X ? 177 1092 B 10 H CC 11 16 92.09 99.09 C-F M B B X B B R C R F ? 177 1092 B 11 H CC 17 22 102.44 110.93 R B B B B B X X X X Late Miocene? 177 1092 B 12 H CC 8 13 111.38 121.31 R-T B B X B B X X X X X ? 177 1092 B 13 H CC 10 15 116.15 126.97 T B B B B B X X ? 177 1092 B 14 H CC 18 23 131.38 144.3 R B B B B B X X X X ? 177 1092 B 15 H CC 20 25 138.37 154.09 R-T B B B B B X X X ? 177 1092 B 16 H CC 20 25 149.09 164.41 R-T B B B B B X X ? 177 1092 B 17 H CC 23 28 157.92 174.78 T B B B B B X X ? 177 1092 B 18 H CC 25 30 168.67 184.58 T B B B B B X X X ? 177 1092 C 1 H CC 7 12 3.99 3.99 C-F M T B B B B R F A R R R T. lentiginosa 0-0.65 177 1092 C 2 H CC 10 15 11.8 14.45 A M R B B B B C R F R R F A middle/upper A. ingens 0.65-1.3 177 1092 C 3 H CC 11 16 23.07 24.67 A M R X X B B C X F F R R R R F lower A. ingens 1.3-1.8 177 1092 C 4 H CC 0 5 32.07 35.3 A M C B B B B A F R T C R R R R lower A. ingens 1.3-1.8 177 1092 C 5 H CC 11 16 40.88 44.93 F M-P B B B B B C T R C R T R R R R R T. kolbei/F. matuyamae 2.0-2.5 177 1092 C 6 H CC 0 10 42 42 C-F M B B B B B T R R R R F T T F R R R T. insigna 2.6-3.3 177 1092 C 7 H CC 8 15 57.58 63.05 C M R B X B B F R R R R R R R R F F R R F F. interfrigidaria 3.3-3.8 177 1092 C 8 H CC 13 20 69.14 75.45 F M B B B B B R T R F R R F X R F F. reinholdii 5.6-6.4 177 1092 C 9 H CC 18 25 80.02 86.97 T B B B B B X X ? 177 1092 C 10 H CC 14 19 89.74 97.42 T B B B B B X X ? 177 1092 C 11 H CC 51 56 98.14 106.64 R B B B B B X X X X ? 177 1092 C 12 H CC 20 25 108.51 118.86 F-R M B B B B B A F R R R ? 177 1092 C 13 H CC 9 16 118.23 129.66 R-T B B X B B X X X ? 177 1092 C 14 H CC 15 20 127.92 142.74 T B B B B B X X ? 177 1092 C 15 H CC 16 23 137.43 152.63 T B B B B B X X ? 177 1092 C 16 H CC 20 26 146.88 165.58 T B B B B B X X ? 177 1092 C 17 H CC 21 26 156.28 176.16 T B B B B B X ? 177 1092 C 18 H CC 23 30 165.95 185.74 B B B B B B ? 177 1092 D 1 H 2 70 70 38.6 40.67 C M R B B B B F C R C R R F R T. kolbei/F. matuyamae 2.0-2.5 177 1092 D 1 H 4 90 90 41.8 43.87 A G R B B B B R C R F R T F R R F F T. kolbei/F. matuyamae 2.0-2.5 177 1092 D 1 H 6 70 70 44.6 46.67 C M R B B B B R R A R F R R R R R R F R T. kolbei/F. matuyamae 2.0-2.5 177 1092 D 2 H 2 30 30 47.7 50.45 F M-P B B B B B R F R A F R R R R T. insigna 2.6-3.3 177 1092 D 2 H 2 80 80 48.2 50.95 F M-P T B B B B R F R F R A F R R R T. insigna 2.6-3.3 177 1092 D 2 H 3 10 10 49 51.75 C M R B B B B R F C R R R C R R F F T. insigna 2.6-3.3 177 1092 D 2 H 4 10 10 50.5 53.25 C M B B B B B R R C R C F R R F T. insigna 2.6-3.3 177 1092 D 2 H 5 10 10 51.8 54.55 C-F M B B B B B C R R X R R R F R T R F F. interfrigidaria 3.3-3.8 177 1092 D 3 H 1 50 50 55.9 60.21 F M R B B B B R F R A R R R F F. interfrigidaria 3.3-3.8 177 1092 D 3 H 3 10 10 58.5 62.81 A M R B B B B F F R A F F C R R R R R R R R R F F. interfrigidaria 3.3-3.8 177 1092 D 3 H 4 10 10 60 64.31 F M T B B B B F R T R T F R F R F T. inura 4.4-4.9 177 1092 D 3 H 5 10 10 61.5 65.81 R-T B B X B B X X X X X X X unzoned 177 1092 D 3 H 6 10 10 63 67.31 C M R B B B B R F R R R F R R R R R C R R-F T A unzoned 177 1092 D 3 H 6 120 120 64.1 68.41 C M B B X B B R R R R R F R C R R unzoned 177 1092 D 3 H 7 10 10 64.5 68.81 R R B B B B X X X X X X ? 177 1092 D 3 H CC 7 14 64.96 69.27 F M-P B B B B B F R F F ?