Table T9. Diatom, silicoflagellate, ebridian, Actiniscus, sponge spicule, and opaline phytolith occurrence in smear slides investigated from Site 1091. 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 (mbsf) Depth (mcd) Diatom abundance Diatom preservation Silicoflagellate occurrence Ebridian occurrrence Actiniscus occurrence Sponge spicule occurrence Opaline phytolith occurrence Actinocyclus actinochilus Actinocyclus praeactinochilus Actinocyclus curvatulus Actinocyclus dimorphus Actinocyclus fasciculatus Actinocyclus ingens Actinocyclus ingens var. ovalis Actinocyclus karstenii Asteromphalus hookeri Asteromphalus parvulus Azpeitia tabularis Chaetoceros spp. Coscinodiscus marginatus Ethmodiscus rex Eucampia antarctica Fragilariopsis angulata Fragilariopsis barronii Fragilariopsis curta Fragilariopsis fossilis Fragilariopsis interfrigidaria Fragilariopsis kerguelensis Fragilariopsis matuyamae F. matuyamae var. heteropolara Fragilariopsis praecurta Fragilariopsis reinholdii Fragilariopsis ritscherii Fragilariopsis separanda Fragilariopsis weaveri Fragilariopsis sp. A (Gersonde, 1991) Hemidiscus cuneiformis Hemidiscus karstenii Proboscia barboi Rhizosolenia antennata fo. semispina Rhizosolenia hebetata fo. semispina Rhizosolenia styliformis Rouxia antarctica Rouxia isopolica Thalassionema nitzschioides Thalassionema nitzschioides fo. 1 Thalassiosira complicata Thalassiosira convexa Thalassiosira convexa var. aspinosa Thalassiosira eccentrica Thalassiosira elliptipora Thalassiosira fasciculata Thalassiosira gracilis Thalassiosira insigna Thalassiosira inura Transition forms T. insigna/T. inura Thalassiosira kolbei Thalassiosira lentiginosa Thalassiosira oestrupii Thalassiosira oliverana Thalassiosira striata Thalassiosira tetraoestrupii var. reimeri Thalassiosira vulnifica Thallassiothrix antarctica-longissima group Diatom zone Diatom age (Ma) 177 1091 A 1 H 3 83 83 3.83 3.83 F M B B B B B F F R F R F F F T. lentiginosa Subz. c 0-0.18 177 1091 A 1 H CC 9 14 6.84 6.84 A G B B B B B F F A C R C T. lentiginosa Subz. c 0-0.18 177 1091 A 2 H CC 9 14 14.43 17.35 A M B B B B B R F R D R R C T. lentiginosa Subz. c 0-0.18 177 1091 A 3 H CC 12 17 25.4 27.58 A G T B B B B R D F R R F T. lentiginosa Subz. b 0.18-0.42 177 1091 A 4 H CC 9 14 34.65 37.85 A G T B B B B T R R D R R C R F T. lentiginosa Subz. b 0.18-0.42 177 1091 A 5 H 5 130 130 42.7 45.01 A G T B B B B R D R R T. lentiginosa Subz. b 0.18-0.42 177 1091 A 5 H 6 55 55 43.45 45.76 A G T B B B B F D R R R-F T. lentiginosa Subz. b 0.18-0.42 177 1091 A 5 H CC 9 15 44.09 46.4 A G B B B B B R R D R F R F T. lentiginosa Subz. b 0.18-0.42 177 1091 A 6 H 1 75 75 45.65 49.12 A G T B B B B R A R R R F R R F T. lentiginosa Subz. b 0.18-0.42 177 1091 A 6 H 1 80.5 80.5 45.71 49.18 C M T B B B B R R R R C R R F R R F T. lentiginosa Subz. b 0.18-0.42 177 1091 A 6 H 1 135 135 46.25 49.72 C M T B B B B R F R A C R F T. lentiginosa Subz. a 0.42-0.65 177 1091 A 6 H CC 7 17 53.97 57.44 A G T B B B B R F R A R F F T. lentiginosa Subz. a 0.42-0.65 177 1091 A 7 H CC 15 20 63.71 67.52 A G T B B B B T R R R R T A R R T T F F T. lentiginosa Subz. a 0.42-0.65 177 1091 A 8 H CC 15 20 70.62 75.51 A G B B B B B R R R R R A F R F T. lentiginosa Subz. a 0.42-0.65 177 1091 A 9 H CC 11 16 81.48 85.93 A G B B B B B F A R F F A. ingens Subz. c 0.65-1.07 177 1091 A 10 H CC 11 21 92.13 97.52 A G T B B X B F T R F T A T T C F A. ingens Subz. c 0.65-1.07 177 1091 A 11 H CC 17 22 101.7 107.46 A G T B B B B F T R C T F R F R C A. ingens Subz. c 0.65-1.07 177 1091 A 12 H CC 0 10 109.25 116.51 A G T B B B B F R C F F F R R F A. ingens Subz. c 0.65-1.07 177 1091 A 13 H CC 6 16 121.08 127.62 A G R B B B B F T R R T C T F R F R C A. ingens Subz. c 0.65-1.07 177 1091 A 14 H CC 16 21 130.54 139.15 A G-M T B B B B F F T C R T R F R C A. ingens Subz. c 0.65-1.07 177 1091 A 15 H CC 11 21 138.37 148.21 A M R B B B B F T R R X R T C R F R F F A. ingens Subz. b 1.07-1.3 177 1091 A 16 H CC 11 16 148.34 162.2 A G B B B B B A R A F R F A. ingens Subz. b 1.07-1.3 177 1091 A 17 H CC 7 14 157.75 170.46 A G T B X B B C R C R F F A. ingens Subz. b 1.07-1.3 177 1091 A 18 H CC 11 16 166.89 181.38 C M B B B B B A F A. ingens Subz. b 1.07-1.3 177 1091 A 19 H CC 9 14 175.7 191.83 A G B B B B B D R R A. ingens Subz. b 1.07-1.3 177 1091 A 20 H CC 8 15 184.73 202.17 A G T B X B B D R F F R F A. ingens Subz. b 1.07-1.3 177 1091 A 21 H CC 9 14 195.01 211.9 A G R B B B B A T R X R F F T T R T F A. ingens Subz. a 1.3-1.8 177 1091 A 22 H CC 8 13 204.24 223.38 A G T B B B B A F F F R R F A. ingens Subz. a 1.3-1.8 177 1091 A 23 H CC 8 13 213.68 234.08 C M T B B B B R C C R T T F T A. ingens Subz. a 1.3-1.8 177 1091 A 24 H CC 10 15 225.49 246.96 A G B B B B B C R F F R A T F R R A. ingens Subz. a 1.3-1.8 177 1091 A 25 H CC 0 10 235.14 256.61 A G B B B B B F C F T A R F A. ingens Subz. a 1.3-1.8 177 1091 A 26 H 3 70 70 238.6 260.29 A G B B B B B A R F F T R F A. ingens Subz. a 1.3-1.8 177 1091 A 26 H 5 70 70 241.6 263.29 A G R B B B B A R A T R F R R F P. barboi 1.8-2.0 177 1091 A 26 H CC 18 23 244.03 265.72 A G R B B B B C R F F T C T F R F P. barboi 1.8-2.0 177 1091 A 27 H 3 70 70 248.1 269.35 A G R B B B B A A R R R R R F P. barboi 1.8-2.0 177 1091 A 27 H 6 70 70 252.6 273.85 C M B B B B B R F X F R C F F P. barboi 1.8-2.0 177 1091 A 27 H CC 11 16 254.23 275.48 A G T B B B B C F C F F R F F P. barboi 1.8-2.0 177 1091 A 28 H 2 70 70 256.1 278.57 F M T B B B B C R F R F R F R R F T. kolbei/F. matuyamae 2.0-2.5 177 1091 A 28 H 5 70 70 260.6 283.07 A G T B B B B F A T F R R C F F T. kolbei/F. matuyamae 2.0-2.5 177 1091 A 28 H CC 22 27 263.22 285.69 A G T B B B B C X R F F R R F R R C T. kolbei/F. matuyamae 2.0-2.5 177 1091 A 29 H 4 90 90 268.8 291.01 A G T B B B B F F R R R F C R R R R C T. kolbei/F. matuyamae 2.0-2.5 177 1091 A 29 H 6 120 120 272.1 294.31 A G T B B B B R R A F R R F R C F F R F T. kolbei/F. matuyamae 2.0-2.5 177 1091 A 29 H CC 13 18 273.15 295.36 F P T B B X B R R A F F R C R R R R R F R R R R T. vulnifica 2.5-2.63 177 1091 A 30 H 2 45 45 274.85 297.32 C M T B B B B F R F R R R F F R R T F T. vulnifica 2.5-2.63 177 1091 A 30 H 6 8 8 280.48 302.95 A G T B B B B R R C R R C R F R R F T. vulnifica 2.5-2.63 177 1091 A 30 H CC 10 15 281.43 303.9 C M T B B B B R R R X C R T R R F R R R R T. vulnifica 2.5-2.63 177 1091 A 31 H 1 71 71 283.11 305.58 C M B B B B B R C F R R F R F R R R T. vulnifica 2.5-2.63 177 1091 A 31 H 5 112 112 289.52 311.99 C M T B B B B R F F F C R R F R F F T. vulnifica 2.5-2.63 177 1091 A 31 H CC 13 18 289.76 312.23 C G-M T B B B B R T F F X F F R T T R T R R T R T F F C F F lower T. insigna 2.63-3.3 177 1091 A 32 H 1 40 40 292.3 314.77 C M T B B B B R F F R C R R F F F R lower T. insigna 2.63-3.3 177 1091 A 32 H 3 68 68 295.58 318.05 A-C M T B B B B F R R R C F F lower T. insigna 2.63-3.3 177 1091 A 32 H 4 130 130 297.7 320.17 C M B B B B B R R R F F R R R C lower T. insigna 2.63-3.3 177 1091 A 32 H CC 30 35 299.17 321.64 A G B B B X B R R R F R F R T F T T C F F R C T F lower T. insigna 2.63-3.3 177 1091 A 33 H 1 48 48 301.88 324.35 A G T B B B B R R R R R R C lower T. insigna 2.63-3.3 177 1091 A 33 H 2 30 31 303.2 325.67 A G B B B B B F R R R R F A lower T. insigna 2.63-3.3 177 1091 A 33 H 3 90 90 305.3 327.77 A G B B B B B F F F F R C R F C upper F. interfigidaria > 3.3 177 1091 A 33 H 4 116 116 307.06 329.53 A G B B B B B C R upper F. interfigidaria > 3.3 177 1091 A 33 H 5 70 70 308.1 330.57 C M B B B B B R F R R F upper F. interfigidaria > 3.3 177 1091 A 33 H 6 120 120 310.1 332.57 C M T B B B B R R C R R F R R R C F upper F. interfigidaria > 3.3 177 1091 A 33 H CC 21 26 310.35 332.82 F M T B B B B R R F R F R R F T F upper F. interfigidaria > 3.3 177 1091 B 1 H CC 9 14 7.74 7.74 A G T B B B B T R R R A C C T. lentiginosa Subz. c 0-0.18 177 1091 B 2 H CC 10 15 14.49 14.71 A G T B B B B R F R A F C T. lentiginosa Subz. c 0-0.18 177 1091 B 3 H CC 9 14 23.82 22.68 A G T B B X B R R R A R F F F C T. lentiginosa Subz. b 0.18-0.42 177 1091 B 4 H CC 9 14 34.5 33.58 A G T B B B B F R R A R F R R F T. lentiginosa Subz. b 0.18-0.42 177 1091 B 5 H CC 9 14 43.47 42.61 A G-M B B B B B T F R F A T T T R F T F T. lentiginosa Subz. b 0.18-0.42 177 1091 B 6 H CC 9 14 54.04 53.07 A G-M T B B B B T F F A T T T F T R C T. lentiginosa Subz. a 0.42-0.65 177 1091 B 7 H CC 8 13 64.44 63.25 A G T B B B B R F A F F F R F T. lentiginosa Subz. a 0.42-0.65 177 1091 B 8 H CC 9 14 72.26 74.17 A G T B B B B R F R A R T F C A. ingens Subz. c 0.65-1.07 177 1091 B 9 H CC 11 16 82.88 83.55 A G-M B B B B B F C T T R T F R F A. ingens Subz. c 0.65-1.07 177 1091 B 10 H CC 9 14 91.7 93.05 A G-M B B B B B F R F X R C F F A. ingens Subz. c 0.65-1.07 177 1091 B 11 H CC 15 20 99.5 101.36 A M T B B B B F F X T C R F R C R F A. ingens Subz. c 0.65-1.07 177 1091 B 12 H CC 0 10 111.42 113.47 A M B B B B B F C R F R R R C A. ingens Subz. c 0.65-1.07 177 1091 B 13 H CC 10 15 122.09 124.2 A G-M T B B B B F F F R T R F R F F A. ingens Subz. c 0.65-1.07 177 1091 B 14 H CC 20 25 127.07 130.59 A G-M T B B B B F X C T F R F R C A. ingens Subz. c 0.65-1.07 177 1091 B 15 H CC 11 16 139.86 142.57 A G-M R B B B B F T R C T R T F C A. ingens Subz. c 0.65-1.07 177 1091 B 16 H CC 10 15 148.11 153.12 A G T B B B B F T T C T T R F R F A. ingens Subz. b 1.07-1.3 177 1091 B 17 H CC 5 10 156.85 163.07 A G B B B B B C T C T R T R C A. ingens Subz. b 1.07-1.3 177 1091 B 18 H CC 9 14 168.07 176.67 A G-M T B B B B A T F R F A. ingens Subz. b 1.07-1.3 177 1091 B 19 H CC 0 5 177.37 188.58 A M T B X B B F R F T F T C A. ingens Subz. b 1.07-1.3 177 1091 B 20 H CC 13 17 185.33 198.45 A G B B B B B A R F F T R T F A. ingens Subz. b 1.07-1.3 177 1091 B 21 H CC 9 16 196.21 209.68 A M B B B B B A R R C F F A. ingens Subz. a 1.3-1.8 177 1091 B 22 H CC 13 18 205.53 220.55 A M T B B B B F R F F R R C A. ingens Subz. a 1.3-1.8 177 1091 B 23 H CC 9 16 213.72 228.3 A G T B B B B F R C T C R R F A. ingens Subz. a 1.3-1.8 177 1091 B 24 H CC 0 6 219.13 234.71 A G-M R B B B B F C T T F R R R R F A. ingens Subz. a 1.3-1.8 177 1091 B 25 H CC 8 14 233.34 248.57 A M R B B B B F C C R R F A. ingens Subz. a 1.3-1.8 177 1091 B 26 H CC 10 15 243.08 260.35 A M T B B B B C X C F T R T F F R F A. ingens Subz. a 1.3-1.8 177 1091 B 27 H CC 12 17 250.88 269.85 A M B B B B B A T F R F F R T C P. barboi 1.8-2.0 177 1091 B 28 H CC 20 25 255.6 275.43 A M T B B B X C F R F T F P. barboi 1.8-2.0 177 1091 B 29 H CC 11 16 268.87 285.04 C M-P T B B B B T F X R C R R R R T F R F T. kolbei/F. matuyamae 2.0-2.5 177 1091 C 1 H CC 7 12 3.9 3.83 T. lentiginosa Subz. c 0-0.18 177 1091 D 1 H CC 0 10 3.51 11.5 A G T B B B B R R A R F C T. lentiginosa Subz. c 0-0.18 177 1091 D 2 H CC 15 20 6.62 18.54 A M R B B B B F F T A F T R F T. lentiginosa Subz. c 0-0.18 177 1091 D 3 H CC 9 14 17.02 27.43 A G B B B B B R R A T T T F C T. lentiginosa Subz. b 0.18-0.42 177 1091 D 4 H CC 6 11 27.45 37.23 A M T B B B B F R A T F F T. lentiginosa Subz. b 0.18-0.42 177 1091 D 5 H CC 11 16 36.17 47.96 A G-M R B B B B T F A F C T. lentiginosa Subz. b 0.18-0.42 177 1091 D 6 H CC 12 17 49.8 58.8 A M B B B B B T R R D F R F T. lentiginosa Subz. a 0.42-0.65 177 1091 D 7 H CC 10 15 58.99 67.57 A G T B B B B R F R D R C C A. ingens Subz. c 0.65-1.07 177 1091 D 8 H CC 10 15 67.83 74.73 A G-M B B B B B R T R D R F C A. ingens Subz. c 0.65-1.07 177 1091 D 9 H CC 10 15 79.74 89.53 A G-M T B B B B R R R R A F F A. ingens Subz. c 0.65-1.07 177 1091 D 10 H CC 9 14 87.28 99.44 A M B B B B B F X D F C A. ingens Subz. c 0.65-1.07 177 1091 D 11 H CC 25 30 96.85 109.5 A M B B B B B T F C R F C A. ingens Subz. c 0.65-1.07 177 1091 D 12 H CC 28 35 107.19 120 A M B B B B B F R C R F A A. ingens Subz. c 0.65-1.07 177 1091 D 13 H CC 9 16 116.62 130.27 A M T B B B B F C R F R C A. ingens Subz. c 0.65-1.07 177 1091 D 14 H CC 0 6 126.6 140.4 A M B B B B B R R C T T T C A. ingens Subz. c 0.65-1.07 177 1091 D 15 H CC 7 14 136.13 151.6 A G-M R B B B B F T A F C A. ingens Subz. b 1.07-1.3 177 1091 D 16 H CC 9 14 145.6 161.57 A G-M B B B B B F C T F C A. ingens Subz. b 1.07-1.3 177 1091 D 17 H CC 8 15 155.24 172.96 A M B B B B B F R F F A A. ingens Subz. b 1.07-1.3 177 1091 D 18 H CC 8 15 163.95 182.86 A G T B B B B A F T F F A. ingens Subz. b 1.07-1.3 177 1091 D 19 H CC 14 19 173.24 193.93 A G-M T B B B B F X F F C A. ingens Subz. b 1.07-1.3 177 1091 D 20 H CC 10 17 182.89 205.32 A G T B B B B A R F F F A. ingens Subz. b 1.07-1.3 177 1091 D 21 H CC 9 16 193.33 217.03 A M B B B B B F F R F R F R F A. ingens Subz. a 1.3-1.8 177 1091 D 22 H CC 12 18 202.42 226.75 A M T B B B B F R C F R F A. ingens Subz. a 1.3-1.8 177 1091 E 1 H CC 10 15 4.19 12.31 A G R B B B B R R D R F F T. lentiginosa Subz. c 0-0.18 177 1091 E 2 H CC 0 10 9.52 19.54 A G-M F B B B B T R D T F F T. lentiginosa Subz. c 0-0.18 177 1091 E 3 H CC 10 15 19.46 28.47 A G-M B B B B B R R D R F R C T. lentiginosa Subz. b 0.18-0.42 177 1091 E 4 H CC 9 14 27.02 36.02 A G-M R B B B B T F D F R C T. lentiginosa Subz. b 0.18-0.42 177 1091 E 5 H CC 6 11 39.78 48.43 A G-M R B B B B C R D F F T. lentiginosa Subz. b 0.18-0.42 177 1091 E 6 H CC 12 17 47.17 60.53 A G R B B B B T T F D R C R F C T. lentiginosa Subz. a 0.42-0.65