Table T6. Summary of biostratigraphic age assignments for Site 1093. Note: CN = calcareous nannofossil. Leg Site Hole Core Type Section Interval Depth Depth Calcareous nannofossil zone Calcareous nannofossil age Diatom zone Diatom age Diatom comment Radiolaria zone Radiolaria age Comment (cm) (mbsf) (mcd) (Ma) (Ma) (Ma) 177 1093 A 1 H CC 12 17 8.49 8.49 NN 21b 0-0.085 T. lentiginosa Subz. c 0-0.18 Omega 0-0.46 177 1093 A 2 H 3 30 30 11.8 11.98 NN 21b 0-0.085 177 1093 A 2 H 5 30 30 14.8 14.98 NN 21a 0.085-0.26 177 1093 A 2 H CC 12 17 18.09 18.27 T. lentiginosa Subz. c 0-0.18 Omega 0-0.46 177 1093 A 3 H 4 30 30 22.8 24.18 NN 21a <0.26 177 1093 A 3 H CC 11 16 27.69 29.07 T. lentiginosa Subz. c 0-0.18 Omega 0-0.46 177 1093 A 4 H 1 1 1 27.51 31.49 T. lentiginosa Subz. c 0-0.18 177 1093 A 4 H 2 120 120 30.2 34.18 NN 21a 0.085-0.26 177 1093 A 4 H 3 30 30 30.8 34.78 NN 21a 0.085-0.26 177 1093 A 4 H CC 10 15 37.49 41.47 T. lentiginosa Subz. c 0-0.18 cold assembl. Omega 0-0.46 Barren CN 177 1093 A 5 H 3 1 1 40.01 43.37 T. lentiginosa Subz. c 0-0.18 cold assembl. 177 1093 A 5 H 5 1 1 43.01 46.37 T. lentiginosa Subz. c 0-0.18 cold assembl. 177 1093 A 5 H 6 1 1 44.51 47.87 T. lentiginosa Subz. c 0-0.18 H. karstenii present 177 1093 A 5 H CC 15 20 46.86 50.22 "T. lentiginosa Subz. b,a" 0.18-0.65 H. karstenii present Omega 0-0.46 177 1093 A 6 H 1 1 1 46.51 51.85 "T. lentiginosa Subz. b,a" 0.18-0.65 H. karstenii present 177 1093 A 6 H 2 1 1 48.01 53.35 "T. lentiginosa Subz. b,a" 0.18-0.65 H. karstenii present 177 1093 A 6 H 3 1 1 49.51 54.85 "T. lentiginosa Subz. b,a" 0.18-0.65 H. karstenii present Barren CN 177 1093 A 6 H CC 0 10 56.01 61.35 NN21a "T. lentiginosa Subz. b,a" 0.18-0.65 H. karstenii present Omega 0-0.46 Barren CN 177 1093 A 7 H CC 24 29 65.47 71.83 NN21a "T. lentiginosa Subz. b,a" 0.18-0.65 H. karstenii present Omega 0-0.46 177 1093 A 8 H 1 1 1 65.51 73.04 "T. lentiginosa Subz. b,a" 0.18-0.65 H. karstenii present 177 1093 A 8 H 2 1 1 67.01 74.54 "T. lentiginosa Subz. b,a" 0.18-0.65 H. karstenii present 177 1093 A 8 H 3 1 1 68.51 76.04 "T. lentiginosa Subz. b,a" 0.18-0.65 cold assembl. Barren CN 177 1093 A 8 H 5 1 1 71.51 79.04 "T. lentiginosa Subz. b,a" 0.18-0.65 cold assembl. 177 1093 A 8 H CC 0 10 75.09 82.62 "T. lentiginosa Subz. b,a" 0.18-0.65 cold assembl. Omega 0-0.46 177 1093 A 9 H 3 1 1 78.01 85.68 "T. lentiginosa Subz. b,a" 0.18-0.65 177 1093 A 9 H CC 15 20 84.77 92.44 "T. lentiginosa Subz. b,a" 0.18-0.65 Omega 0-0.46 177 1093 A 10 H 6 1 1 91.96 101.09 "T. lentiginosa Subz. b,a" 0.18-0.65 177 1093 A 10 H 7 1 1 93.46 102.59 "T. lentiginosa Subz. b,a" 0.18-0.65 177 1093 A 10 H CC 0 10 93.93 103.06 NN 20 0.26-0.46 "T. lentiginosa Subz. b,a" 0.18-0.65 Omega 0-0.46 177 1093 A 11 H 1 1 1 94.01 104.36 "T. lentiginosa Subz. b,a" 0.18-0.65 Barren CN 177 1093 A 11 H CC 16 21 103.76 114.11 "T. lentiginosa Subz. b,a" 0.18-0.65 Omega 0-0.46 177 1093 A 12 H CC 0 10 113.06 124.69 NN 20 0.26-0.46 "T. lentiginosa Subz. b,a" 0.18-0.65 Omega 0-0.46 almost barren CN 177 1093 A 13 H 1 1 1 113.01 124.68 "T. lentiginosa Subz. b,a" 0.18-0.65 Barren CN 177 1093 A 13 H 1 10 10 113.1 124.77 "T. lentiginosa Subz. b,a" 0.18-0.65 A. ingens reworked 177 1093 A 13 H 1 75 75 113.75 125.42 "T. lentiginosa Subz. b,a" 0.18-0.65 A. ingens reworked 177 1093 A 13 H 2 1 1 114.51 126.18 "T. lentiginosa Subz. b,a" 0.18-0.65 A. ingens reworked 177 1093 A 13 H 2 40 40 114.9 126.57 "T. lentiginosa Subz. b,a" 0.18-0.65 A. ingens reworked 177 1093 A 13 H 2 120 120 115.7 127.37 "T. lentiginosa Subz. b,a" 0.18-0.65 A. ingens reworked 177 1093 A 13 H 3 1 1 116.01 127.68 "T. lentiginosa Subz. b,a" 0.18-0.65 A. ingens reworked 177 1093 A 13 H 3 80 81 116.8 128.47 Omega 0-0.46 Barren CN 177 1093 A 13 H 4 80 81 118.3 129.97 Psi 0.46-0.83 Barren CN 177 1093 A 13 H CC 15 20 122.43 134.1 "T. lentiginosa Subz. b,a" 0.18-0.65 cold assembl. Psi 0.46-0.83 177 1093 A 14 H CC 10 15 131.74 144.35 "T. lentiginosa Subz. b,a" 0.18-0.65 A. ingens reworked Psi 0.46-0.83 177 1093 A 15 H 5 40 40 138.4 150.93 NN 20 0.26-0.46 Barren CN 177 1093 A 15 H 6 40 40 139.9 152.43 NN 20 0.26-0.46 177 1093 A 15 H CC 11 16 141.86 154.39 NN 20 0.26-0.46 "T. lentiginosa Subz. b,a" 0.18-0.65 A. ingens reworked Psi 0.46-0.83 177 1093 A 16 H 3 129 129 145.79 159.16 NN 19 >0.46 Barren CN 177 1093 A 16 H CC 0 10 150.92 164.29 "T. lentiginosa Subz. b,a" 0.18-0.65 A. ingens reworked Psi 0.46-0.83 177 1093 A 17 H CC 24 29 160.88 173.99 "T. lentiginosa Subz. b,a" 0.18-0.65 A. ingens reworked 177 1093 A 18 H 2 1 1 162.01 176.3 A. ingens Subz. c 0.65-1.3 177 1093 A 18 H 4 1 1 165.01 179.3 A. ingens Subz. c 0.65-1.3 177 1093 A 18 H CC 10 15 170.37 184.66 NN19 >0.46 A. ingens Subz. c 0.65-1.07 177 1093 A 19 H 3 1 1 173.01 190.1 A. ingens Subz. c 0.65-1.07 177 1093 A 19 H 6 1 1 177.51 194.6 A. ingens Subz. c 0.65-1.07 177 1093 A 19 H CC 17 22 179.85 196.94 A. ingens Subz. c 0.65-1.07 177 1093 A 20 H 2 1 1 181.01 200.06 A. ingens Subz. c 0.65-1.07 177 1093 A 20 H 7 1 1 188.51 207.56 A. ingens Subz. c 0.65-1.07 177 1093 A 20 H CC 17 22 189.28 208.33 A. ingens Subz. c 0.65-1.07 Psi 0.46-0.83 177 1093 A 21 H CC 48 53 198.48 219.03 A. ingens Subz. c 0.65-1.07 Chi 0.83-1.92 177 1093 A 22 H 2 30 30 200.3 220.79 NN 19 0.46-0.88 177 1093 A 22 H CC 0 10 207.46 227.95 NN 19 0.88-1.08 A. ingens Subz. c 0.65-1.07 177 1093 A 23 H CC 0 10 217.63 238.72 NN 19 0.88-0.96 A. ingens Subz. c 0.65-1.07 Chi 0.83-1.92 177 1093 A 24 H 5 15 15 223.65 245.54 NN 19 0.88-0.96 177 1093 A 24 H 5 140 140 224.9 246.79 NN 19 0.96-1.08 177 1093 A 24 H CC 35 40 227.11 249 NN 19 0.96-1.08 A. ingens Subz. c 0.65-1.07 T. longissima ooze 177 1093 A 25 H CC 25 30 235.16 256.2 A. ingens Subz. c 0.65-1.07 Chi 0.83-1.92 177 1093 A 26 H 6 50 50 242.5 262.77 NN 19 0.96-1.08 Barren CN 177 1093 A 26 H CC 19 24 243.69 263.96 NN 19 >1.08 A. ingens Subz. c 0.65-1.07 Chi 0.83-1.92 Barren CN 177 1093 A 28 X 1 1 1 251.01 271.85 A. ingens Subz. b 1.07-1.3 Barren CN 177 1093 A 28 X CC 12 17 257.85 278.69 A. ingens Subz. b 1.07-1.3 Chi 0.83-1.92 177 1093 A 29 X CC 13 18 264.63 285.47 A. ingens Subz. b 1.07-1.3 T. longissima ooze Chi 0.83-1.92 Barren CN 177 1093 A 30 H CC 15 20 274.26 295.1 NN 19 1.08-1.24 A. ingens Subz. b 1.07-1.3 Chi 0.83-1.92 177 1093 A 31 X CC 0 2 275.4 296.24 A. ingens Subz. b 1.07-1.3 Chi 0.83-1.92 177 1093 B 1 H CC 8 13 7.1 12.38 T. lentiginosa Subz. c 0-0.18 Barren CN 177 1093 B 2 H CC 0 10 16.16 23.1 T. lentiginosa Subz. c 0-0.18 Omega 0-0.46 177 1093 B 3 H CC 8 13 21.89 30.97 T. lentiginosa Subz. c 0-0.18 Barren CN 177 1093 B 4 H CC 9 14 35.84 45.32 T. lentiginosa Subz. c 0-0.18 177 1093 B 5 H CC 4 12 45.21 57.31 "T. lentiginosa Subz. b,a" 0.18-0.65 H. karstenii present 177 1093 B 6 H CC 15 20 53.08 67.74 "T. lentiginosa Subz. b,a" 0.18-0.65 H. karstenii present Omega 0-0.46 177 1093 B 7 H CC 10 15 63.89 77.66 "T. lentiginosa Subz. b,a" 0.18-0.65 177 1093 B 8 H CC 7 12 73.39 87.86 "T. lentiginosa Subz. b,a" 0.18-0.65 H. karstenii present 177 1093 B 9 H CC 10 15 83.24 99.33 "T. lentiginosa Subz. b,a" 0.18-0.65 H. karstenii present 177 1093 B 10 H CC 17 22 91.91 108.38 "T. lentiginosa Subz. b,a" 0.18-0.65 warm assembl. Omega 0-0.46 Barren CN 177 1093 B 11 H CC 12 17 102.29 121 "T. lentiginosa Subz. b,a" 0.18-0.65 177 1093 B 12 H 1 130 130 103.4 122.95 "T. lentiginosa Subz. b,a" 0.18-0.65 177 1093 B 12 H 2 110 110 104.7 124.25 "T. lentiginosa Subz. b,a" 0.18-0.65 A. ingens reworked 177 1093 B 12 H 3 40 40 105.5 125.05 "T. lentiginosa Subz. b,a" 0.18-0.65 A. ingens reworked 177 1093 B 12 H 4 60 60 107.2 126.75 "T. lentiginosa Subz. b,a" 0.18-0.65 A. ingens reworked Barren CN 177 1093 B 12 H CC 18 23 110.68 130.23 "T. lentiginosa Subz. b,a" 0.18-0.65 A. ingens reworked 177 1093 B 13 H 1 50 50 112.1 130.81 "T. lentiginosa Subz. b,a" 0.18-0.65 177 1093 B 13 H CC 16 21 121.43 140.14 "T. lentiginosa Subz. b,a" 0.18-0.65 A. ingens reworked 177 1093 B 14 H CC 11 16 130.23 149.88 "T. lentiginosa Subz. b,a" 0.18-0.65 A. ingens reworked Psi 0.46-0.83 177 1093 B 15 H 5 40 40 136.42 157.31 NN 20 0.26-0.46 "T. lentiginosa Subz. b,a" 0.18-0.65 A. ingens reworked 177 1093 B 15 H 6 40 40 137.92 158.81 NN 19 0.46-0.88 "T. lentiginosa Subz. b,a" 0.18-0.65 A. ingens reworked almost barren CN 177 1093 B 15 H CC 13 18 138.5 159.39 "T. lentiginosa Subz. b,a" 0.18-0.65 A. ingens reworked 177 1093 B 16 H CC 7 12 149.33 169.66 "T. lentiginosa Subz. b,a" 0.18-0.65 A. ingens reworked 177 1093 B 17 H CC 7 12 158.62 179.95 A. ingens Subz. c 0.65-1.3 177 1093 B 18 H CC 0 7 167.39 192.08 A. ingens Subz. c 0.65-1.07 A. ingens acme Psi 0.46-0.83 177 1093 B 19 H CC 6 11 178.18 202.85 A. ingens Subz. c 0.65-1.07 177 1093 B 20 H CC 23 28 186.91 214.8 A. ingens Subz. c 0.65-1.07 177 1093 B 21 H CC 14 19 195.34 224.19 NN 19 0.46-.88? A. ingens Subz. c 0.65-1.07 177 1093 B 22 H CC 15 20 205.44 233.45 NN 19 0.88-1.08? A. ingens Subz. c 0.65-1.07 T. longissima ooze Chi 0.83-1.92 177 1093 B 23 H CC 24 29 215.8 245.25 0.88-1.08 A. ingens Subz. c 0.65-1.07 177 1093 B 24 H CC 0 10 221.8 252.11 0.88-1.08 A. ingens Subz. c 0.65-1.07 Barren CN 177 1093 C 1 H CC 0 12 7.88 14.94 NN 21a <0.26 Omega 0-0.46 177 1093 C 2 H CC 0 10 13.76 23.3 NN 21a <0.26 177 1093 C 3 H CC 14 19 25.14 35.28 NN 21a <0.26 Omega 0-0.46 177 1093 C 5 H CC 11 16 44.5 58.92 ? Omega 0-0.46 177 1093 C 6 H CC 17 22 52.17 68.01 "T. lentiginosa Subz. b,a" 0.18-0.65 H. karstenii present 177 1093 C 7 H CC 0 10 64.59 78.4 "T. lentiginosa Subz. b,a" 0.18-0.65 Omega 0-0.46 177 1093 C 12 H CC 6 11 111.34 131.39 NN 20? <0.46? 177 1093 C 13 H CC 13 18 114.37 138.42 Psi 0.46-0.83 177 1093 C 14 H CC 15 20 128.12 147.35 NN 19? >0.46? 177 1093 C 15 H CC 9 14 136.86 161.37 NN 19 >0.46 177 1093 C 16 H CC 0 7 144.12 167.71 NN 19 >0.46 177 1093 C 17 H CC 9 14 155.49 180.5 NN 19 >0.46 Psi 0.46-0.83 177 1093 D 1 H CC 0 4 142.88 159.37 NN 19? >0.46? "T. lentiginosa Subz. b,a" 0.18-0.65 A. ingens reworked ? ? 177 1093 D 2 H CC 20 25 147.68 163.69 "T. lentiginosa Subz. b,a" 0.18-0.65 A. ingens reworked 177 1093 D 3 H CC 0 10 159.9 175.13 NN 19 >0.46 A. ingens Subz. c 0.65-1.3 177 1093 D 4 H CC 14 19 173.37 190.68 A. ingens Subz. c 0.65-1.07 177 1093 D 5 H CC 0 10 182.73 200.96 NN 19 >0.46 A. ingens Subz. c 0.65-1.07 warm assembl. ? ? 177 1093 D 6 H CC 0 10 189.17 210.66 NN 19 >0.46 A. ingens Subz. c 0.65-1.07 warm assembl. 177 1093 D 7 H 1 0 1 193 213.69 NN 19 0.46-0.88 177 1093 D 7 H CC 0 10 195.26 215.95 A. ingens Subz. c 0.65-1.07 177 1093 D 8 H 3 0 1 205.5 227.33 NN 19 0.88-1.08 177 1093 D 8 H CC 10 15 208.42 230.25 A. ingens Subz. c 0.65-1.07 cold assembl. 177 1093 D 10 H CC 0 10 226.74 251.45 A. ingens Subz. c 0.65-1.07 Chi 0.83-1.92 177 1093 D 11 H CC 0 10 237.67 259.78 NN 19 0.88-1.08 A. ingens Subz. c 0.65-1.07 T. longissima ooze Barren CN 177 1093 D 12 H 1 0 1 240.5 265.89 NN 19 >1.08 Barren CN 177 1093 D 12 H CC 15 20 245.22 270.61 NN 19 >1.08 A. ingens Subz. b 1.07-1.3 Barren CN 177 1093 D 14 H CC 0 10 259.98 286.08 A. ingens Subz. b 1.07-1.3 Chi 0.83-1.92 177 1093 D 15 H CC 0 5 270.39 296.49 A. ingens Subz. b 1.07-1.3 177 1093 D 16 H CC 0 5 278.5 304.6 A. ingens Subz. b 1.07-1.3 Barren CN 177 1093 D 17 H CC 0 10 288.43 314.53 A. ingens Subz. b 1.07-1.3 Chi 0.83-1.92 177 1093 D 18 H CC 0 2 297.5 323.6 A. ingens Subz. b 1.07-1.3 reworked assemblage? 177 1093 D 21 X CC 0 1 319 345.1 A. ingens Subz. a 1.3-1.8 warm assembl. Barren CN 177 1093 D 22 H CC 0 5 329.75 355.85 A. ingens Subz. a 1.3-1.8 A. ingens ooze 177 1093 D 27 X CC 9 14 373.37 399.47 A. ingens Subz. a 1.3-1.8 Chi 0.83-1.92 Barren CN 177 1093 D 28 X CC 5 15 378.78 404.88 A. ingens Subz. a 1.3-1.8 177 1093 D 29 X CC 13 18 395.7 421.8 A. ingens Subz. a 1.3-1.8 warm assembl. 177 1093 D 32 X CC 20 24 415.3 441.4 A. ingens Subz. a 1.3-1.8 A. ingens acme 177 1093 D 33 X CC 13 18 434.38 460.48 A. ingens Subz. a 1.3-1.8 A. ingens acme Chi 0.83-1.92 177 1093 D 34 X 1 0 1 434.43 460.53 T. kolbei/F. matuyamae 2.0-2.5 177 1093 D 34 X 3 0 1 437.3 463.4 T. kolbei/F. matuyamae 2.0-2.5 177 1093 D 34 X 5 0 1 440.3 466.4 T. kolbei/F. matuyamae 2.0-2.5 177 1093 D 34 X CC 24 29 441.35 467.45 T. kolbei/F. matuyamae 2.0-2.5 177 1093 D 35 X 3 0 1 446.9 473 T. kolbei/F. matuyamae 2.0-2.5 177 1093 D 35 X 7 0 1 452.5 478.6 T. kolbei/F. matuyamae 2.0-2.5 177 1093 D 35 X CC 0 1 452.99 479.09 T. kolbei/F. matuyamae 2.0-2.5 Chi 0.83-1.92 177 1093 D 36 X CC 24 29 462.96 489.06 <1.69? T. kolbei/F. matuyamae 2.0-2.5 Phi 1.92-2.42 177 1093 D 37 X 3 0 1 465.9 492 T. kolbei/F. matuyamae 2.0-2.5 177 1093 D 37 X 6 0 1 470.4 496.5 T. vulnifica 2.5-2.6 177 1093 D 37 X CC 20 25 472.74 498.84 T. vulnifica 2.5-2.6 Phi 1.92-2.42 177 1093 D 38 X 5 0 1 478.5 504.6 T. vulnifica 2.5-2.6 177 1093 D 38 X CC 48 53 480.26 506.36 T. insigna 2.6-3.3 177 1093 D 39 X CC 13 18 489.12 515.22 T. insigna 2.6-3.3 177 1093 D 40 X 1 38 38 491.98 518.08 T. insigna 2.6-3.3 T. longissima ooze 177 1093 D 40 X CC 17 22 495.67 521.77 T. insigna 2.6-3.3 Upsilon 2.61-3.5 177 1093 D 41 X CC 26 31 502.69 528.79 T. insigna 2.6-3.3 T. longissima ooze Upsilon 2.61-3.5 177 1093 D 44 X CC 20 25 531.31 557.41 F. interfrigidaria 3.3-3.8 177 1093 D 45 X CC 0 10 545.28 571.38 F. interfrigidaria 3.3-3.8 Upsilon 2.61-3.5 177 1093 D 46 X CC 11 16 552.51 578.61 F. interfrigidaria 3.3-3.8 177 1093 D 47 X CC 0 10 559.4 585.5 F. interfrigidaria 3.3-3.8 Upsilon 3.5-4.57 177 1093 D 48 X CC 8 9 568.88 594.98 F. reinholdii 5.6-6.4 N. mirabilis ooze 177 1093 D 50 X CC 0 2 588.6 614.7 unzoned No diatoms ? ? 177 1093 E 1 H CC 10 15 10.5 11.09 T. lentiginosa Subz. c 0-0.18 cold assembl. 177 1093 E 2 H CC 13 18 37.94 44.42 T. lentiginosa Subz. c 0-0.18 177 1093 F 1 H CC 13 18 40.06 43.11 T. lentiginosa Subz. c 0-0.18 cold assembl.