Table T6. Summary of Biostratigraphic Age Assigments for Site 1091. Note: CN = calcareous nannofossil. Core, section, interval (cm) Depth (mbsf) Depth (mcd) Calcareous nannofossil zone Calcareous nannofossil age (Ma) Diatom zone Diatom age (Ma) Radiolaria zone Radiolaria age (Ma) Comment 177-1091A- 1H- 3, 83-83 3. 83 3. 83 T. lentiginosa Subzone c 0- 0. 18 1H- CC, 9- 14 6.84 6.84 NN21 <0. 26 T. lentiginosa Subzone c 0- 0. 18 Omega 0- 0.46 2H- CC, 9- 14 14. 43 17. 35 T. lentiginosa Subzone c 0- 0. 18 Omega 0- 0.46 3H- CC, 12- 17 25. 40 27. 58 T. lentiginosa Subzone b 0. 18- 0. 42 Omega 0- 0.46 4H- CC, 9- 14 34. 65 37. 85 T. lentiginosa Subzone b 0. 18- 0. 42 5H- 2, 140- 140 38.3 40. 61 T. lentiginosa Subzone b 0. 18- 0. 42 5H- 5, 130- 130 42.7 45. 01 T. lentiginosa Subzone b 0. 18- 0. 42 5H- 6, 55- 55 43.45 45. 76 T. lentiginosa Subzone b 0. 18- 0. 42 5H- CC, 9- 15 44. 09 46. 40 T. lentiginosa Subzone b 0. 18- 0. 42 6H- 1, 75- 75 45.65 49. 12 T. lentiginosa Subzone b 0. 18- 0. 42 6H- 1, 80. 5- 80.5 45.71 49. 18 6H- 1, 85- 85 45.75 49. 22 T. lentiginosa Subzone b 0. 18- 0. 42 6H- 1, 135- 135 46.25 49. 72 T. lentiginosa Subzone a 0. 42- 0. 65 6H- CC, 7- 17 53. 97 57.44 NN20 <0. 46 T. lentiginosa Subzone a 0. 42- 0. 65 Omega 0- 0.46 A. ingens reworked 7H- 3, 26- 26 56. 60 60. 41 NN19 0. 46- 0.96 7H- CC, 15- 20 63. 71 67. 52 T. lentiginosa Subzone a 0. 42- 0. 65 8H- 5, 10- 10 70. 00 74. 89 NN19 0. 46- 0.88 CN: reworking 8H- CC, 15- 20 70. 62 75. 51 T. lentiginosa Subzone a 0. 42- 0. 65 Psi 0.46- 0. 83 A. ingens reworked 9H- 4, 127- 127 79.17 83. 62 NN19 0.46- 0. 88 CN: high Oligocene-Eocene reworking 9H- CC, 11- 16 81. 48 85.93 NN19 0.46- 1. 69 A. ingens Subzone c 0. 65- 1. 07 10H- CC, 11- 21 92.13 97. 52 NN19 0. 46- 0.96? A. ingens Subzone c 0. 65- 1. 07 Psi 0.46- 0. 83 11H- 6, 45- 45 100. 35 106. 11 NN19 0. 46- 0.88 11H- CC, 17- 22 101. 70 107. 46 A. ingens Subzone c 0. 65- 1. 07 12H- 1, 13- 13 102. 03 109. 29 NN19 0. 46- 0.88 12H- CC, 0- 10 109.25 116.51 A. ingens Subzone c 0. 65- 1. 07 Psi 0.46- 0. 83 13H- 4, 104- 104 116.94 123.48 NN19 0.88- 0. 96 13H- 7, 5- 5 120. 45 126. 99 NN19 >0. 88 13H- 7, 88- 88 121. 28 127. 82 NN19 0. 88- 0.96 13H- CC, 6- 16 121.08 127.62 NN19 0.88- 0. 96 A. ingens Subzone c 0. 65- 1. 07 14H- 4, 130- 130 126.7 135.31 NN19 0.96- 1. 08 14H- 5, 30- 30 127. 20 135. 81 NN19 0. 96- 1.08 14H- CC, 16- 21 130. 54 139. 15 A. ingens Subzone c 0. 65- 1. 07 Chi 0.83- 1. 92 15H- 4, 60- 60 135. 50 145. 34 NN19 0. 96- 1.08 15H- 5, 10- 10 136. 50 146. 34 NN19 0. 96- 1.08 15H- 5, 136- 136 137.76 147.6 NN19 0.96- 1. 08 15H- CC, 11- 21 138. 37 148. 21 A. ingens Subzone b 1. 07- 1. 3 16H- 3, 130- 130 144.2 158.06 NN19 1.24- 1. 46 Chi 0. 83- 1. 92 16H- 4, 20- 20 144. 60 158. 46 NN19 1. 24- 1.46 16H- CC, 11- 16 148. 34 162. 20 A. ingens Subzone b 1. 07- 1. 3 17H- 5, 121- 121 156.61 169.32 NN19 1.24- 1. 46 17H- 5, 145- 145 156.85 169.56 NN19 1.24- 1. 46 17H- CC, 7- 14 157.75 170.46 A. ingens Subzone b 1. 07- 1. 3 18H- 3, 4- 4 161. 94 176. 43 NN19 1. 24- 1.46 18H- 4, 77- 77 164. 17 178. 66 NN19 1. 24- 1.46 18H- 6, 36- 36 166. 76 181. 25 NN19 1. 24- 1.46 18H- CC, 11- 16 166. 89 181. 38 NN19 1. 24- 1.46 A. ingens Subzone b 1. 07- 1. 3 Chi 0. 83- 1. 92 19H- 2, 30- 30 170. 20 186. 33 NN19 1. 24- 1.46 19H- 2, 70- 70 170. 60 186. 73 NN19 1. 24- 1.46 19H- 3, 70- 70 172. 10 188. 23 NN19 1. 24- 1.46 19H- 3, 130- 130 172.7 188.83 NN19 1.24- 1. 46 19H- CC, 9- 14 175.7 191.83 A. ingens Subzone b 1. 07- 1. 3 CN: barren 20H- 1, 90- 90 178. 80 196. 24 NN19 >1. 46 20H- 4, 60- 60 183. 00 200. 44 NN19 1. 46- 1.69 20H- CC, 8- 15 184.73 202.17 A. ingens Subzone b 1. 07- 1. 3 Chi 0. 83- 1. 92 CN: barren 21H- 2, 53- 53 189. 43 206. 32 NN19 1. 46- 1.69 21H- CC, 9- 14 195.01 211.9 A. ingens Subzone a 1. 3- 1. 8 CN: barren 22H- 5, 120- 120 204.1 223.24 NN19 1.46- 1. 69 22H- CC, 8- 13 204.24 223.38 NN19 1.46- 1. 69 A. ingens Subzone a 1. 3- 1. 8 Chi 0. 83- 1. 92 23H- 4, 30- 30 211. 20 231. 60 1. 46- 1.69 23H- 5, 110- 110 213.5 233.9 NN19 >1. 69 23H- CC, 8- 13 213.68 234.08 NN19 >1. 69 A. ingens Subzone a ?ca. 1. 5 24H- CC, 10- 15 225. 49 246. 96 A. ingens Subzone a 1. 3- 1. 8 Chi 0. 83- 1. 92 CN: barren 25H- CC, 0- 10 235.14 256.61 A. ingens Subzone a 1. 3- 1. 8 CN: barren 26H- 2, 33- 33 236. 73 258. 42 >1. 69 CN: no zonation 26H- 3, 70- 70 238. 60 260. 29 A. ingens Subzone a 1. 3- 1. 8 26H- 4, 105- 105 240. 45 262. 14 >1. 69 CN: no zonation 26H- 5, 70- 70 241. 60 263. 29 P. barboi 1. 8- 2. 0 26H- CC, 18- 23 244. 03 265. 72 P. barboi 1. 8- 2. 0 Chi 0. 83- 1. 92 CN: barren 27H- 3, 70- 70 248. 10 269. 35 P. barboi 1. 8- 2. 0 27H- 4, 62- 62 249. 52 270. 77 >1. 69 27H- 6, 70- 70 252. 60 273. 85 P. barboi 1. 8- 2. 0 27H- 7, 70- 70 254. 10 275. 35 >1. 69 27H- CC, 11- 16 254. 23 275. 48 >1. 69 P. barboi 1. 8- 2. 0 28H- 2, 70- 70 256. 10 278. 57 T. kolbei/ F. matuyamae 2. 0- 2. 5 28H- 5, 70- 70 260. 60 283. 07 T. kolbei/ F. matuyamae 2. 0- 2. 5 28H- CC, 22- 27 263. 22 285. 69 T. kolbei/ F. matuyamae 2.0- 2. 5 Phi 1. 92- 2.42 CN: barren 29H- 4, 90- 90 268. 80 291. 01 T. kolbei/ F. matuyamae 2. 0- 2. 5 29H- 6, 120- 120 272. 10 294. 31 T. kolbei/ F. matuyamae 2. 0- 2. 5 29H- CC, 13- 18 273. 15 295. 36 T. vulnifica 2. 5- 2. 63 CN: barren 30H- 2, 45- 45 274. 85 297. 32 T. vulnifica 2. 5- 2. 63 30H- 6, 8- 8 280. 48 302. 95 T. vulnifica 2. 5- 2. 63 30H- CC, 10- 15 281. 43 303. 90 T. vulnifica 2.5- 2. 63 Upsilon 2. 42- 2.61 CN: barren 31H- 1, 71- 71 283. 11 305. 58 T. vulnifica 2. 5- 2. 63 31H- 5, 112- 112 289. 52 311. 99 T. vulnifica 2. 5- 2. 63 31H- CC, 13- 18 289. 76 312. 23 lower T. insigna 2. 63- 3. 3 CN: barren 32H- 1, 40- 40 292. 30 314. 77 lower T. insigna 2.63- 3. 3 32H- 3, 68- 68 295. 58 318. 05 lower T. insigna 2.63- 3. 3 32H- 4, 130- 130 297. 70 320. 17 lower T. insigna 2.63- 3. 3 32H- CC, 30- 35 299. 17 321. 64 lower T. insigna 2. 63- 3. 3 Upsilon 2. 61- CN: barren 33H- 1, 48- 48 301. 88 324. 35 lower T. insigna 2.63- 3. 3 33H- 2, 30- 31 303. 20 325. 67 lower T. insigna 2.63- 3. 3 33H- 3, 90- 90 305. 30 327. 77 upper F. interfigidaria > 3.3 33H- 4, 116- 116 307. 06 329. 53 upper F. interfigidaria > 3.3 33H- 5, 70- 70 308. 10 330. 57 upper F. interfigidaria > 3.3 33H- 6, 120- 120 310. 10 332. 57 upper F. interfigidaria > 3.3 33H- CC, 21- 26 310. 35 332. 82 upper F. interfigidaria > 3.3 Upsilon 2. 61- CN: barren 177-1091B- 1H-CC, 9-14 7.74 7.74 T. lentiginosa Subzone c 0- 0. 18 Omega 0- 0.46 2H- CC, 10- 15 14. 49 14. 71 T. lentiginosa Subzone c 0- 0. 18 3H- CC, 9- 14 23. 82 22. 68 T. lentiginosa Subzone b 0. 18- 0. 42 4H- CC, 9- 14 34. 50 33. 58 T. lentiginosa Subzone b 0. 18- 0. 42 5H- CC, 9- 14 43. 47 42. 61 T. lentiginosa Subzone b 0. 18- 0. 42 Omega 0- 0.46 6H- CC, 9- 14 54. 04 53. 07 T. lentiginosa Subzone a 0. 42- 0. 65 7H- CC, 8- 13 64. 44 63. 25 T. lentiginosa Subzone a 0. 42- 0. 65 8H- CC, 9- 14 72. 26 74. 17 A. ingens Subzone c 0. 65- 1. 07 9H- CC, 11- 16 82. 88 83. 55 A. ingens Subzone c 0. 65- 1. 07 Psi 0.46- 0. 83 10H- CC, 9- 14 91. 70 93. 05 A. ingens Subzone c 0. 65- 1. 07 11H- CC, 15- 20 99.5 101.36 A. ingens Subzone c 0. 65- 1. 07 12H- CC, 0- 10 111.42 113.47 A. ingens Subzone c 0. 65- 1. 07 13H- CC, 10- 15 122. 09 124. 20 A. ingens Subzone c 0. 65- 1. 07 Chi 0.83- 1. 92 14H- CC, 20- 25 127. 07 130. 59 NN19 0. 96- 1.08 A. ingens Subzone c 0. 65- 1. 07 15H- CC, 11- 16 139. 86 142. 57 A. ingens Subzone c 0. 65- 1. 07 16H- CC, 10- 15 148. 11 153. 12 A. ingens Subzone b 1. 07- 1. 3 17H- CC, 5- 10 156.85 163.07 A. ingens Subzone b 1. 07- 1. 3 Chi 0. 83- 1. 92 18H- CC, 9- 14 168.07 176.67 NN19 1.24- 1. 46 A. ingens Subzone b 1. 07- 1. 3 19H- CC, 0- 5 177. 37 188. 58 A. ingens Subzone b 1. 07- 1. 3 20H- CC, 13- 17 185. 33 198. 45 A. ingens Subzone b 1. 07- 1. 3 21H- CC, 9- 16 196.21 209.68 A. ingens Subzone a 1. 3- 1. 8 Chi 0. 83- 1. 92 CN: barren 22H- CC, 13- 18 205. 53 220. 55 A. ingens Subzone a 1. 3- 1. 8 CN: barren 23H- CC, 9- 16 213.72 228.3 A. ingens Subzone a 1. 3- 1. 8 CN: barren 24H- CC, 0- 6 219. 13 234. 71 >1. 69 A. ingens Subzone a 1. 3- 1. 8 CN: no zonation 25H- CC, 8- 14 233.34 248.57 A. ingens Subzone a 1. 3- 1. 8 Chi 0. 83- 1. 92 26H- CC, 10- 15 243. 08 260. 35 A. ingens Subzone a 1. 3- 1. 8 27H- CC, 12- 17 250. 88 269. 85 P. barboi 1.8- 2. 0 Chi 0. 83- 1.92 28H- CC, 20- 25 255. 60 275. 43 P. barboi 1.8- 2. 0 Chi 0. 83- 1.92 29H- CC, 11- 16 268. 87 285. 04 T. kolbei/ F. matuyamae 2.0- 2. 5 Phi 1. 92- 2.42 177- 1091C-1H- CC, 7- 12 3.9 3.9 NN21 <0. 26 T. lentiginosa Subzone c 0- 0. 18 Omega 0- 0.46 177- 1091D-1H- CC, 0- 10 3. 51 11. 50 NN21 <0. 26 T. lentiginosa Subzone c 0- 0. 18 2H- CC, 15- 20 6. 62 18. 54 T. lentiginosa Subzone c 0- 0. 18 3H- CC, 9- 14 17. 02 27. 43 T. lentiginosa Subzone b 0. 18- 0. 42 Omega 0- 0.46 4H- CC, 6- 11 27. 45 37. 23 T. lentiginosa Subzone b 0. 18- 0. 42 5H- CC, 11- 16 36. 17 47.96 NN20 0.26- 0. 46 T. lentiginosa Subzone b 0. 18- 0. 42 6H- CC, 12- 17 49. 80 58. 80 T. lentiginosa Subzone a 0. 42- 0. 65 7H- CC, 10- 15 58. 99 67. 57 A. ingens Subzone c 0. 65- 1. 07 Psi 0.46- 0. 83 8H- CC, 10- 15 67. 83 74. 73 NN19 >0. 46 A. ingens Subzone c 0. 65- 1. 07 9H- CC, 10- 15 79. 74 89. 53 A. ingens Subzone c 0. 65- 1. 07 10H- CC, 9- 14 87. 28 99. 44 A. ingens Subzone c 0. 65- 1. 07 11H- CC, 25- 30 96.85 109.5 A. ingens Subzone c 0. 65- 1. 07 12H- CC, 28- 35 107. 19 120. 00 A. ingens Subzone c 0. 65- 1. 07 13H- CC, 9- 16 116.62 130.27 A. ingens Subzone c 0. 65- 1. 07 14H- CC, 0- 6 126. 60 140. 40 A. ingens Subzone c 0. 65- 1. 07 15H- CC, 7- 14 136.13 151.6 NN19 1.08- 1. 24 A. ingens Subzone b 1. 07- 1. 3 Chi 0. 83- 1. 92 16H- CC, 9- 14 145.6 161.57 A. ingens Subzone b 1. 07- 1. 3 17H- CC, 8- 15 155.24 172.96 A. ingens Subzone b 1. 07- 1. 3 18H- CC, 8- 15 163.95 182.86 NN19 >1. 24 A. ingens Subzone b 1. 07- 1. 3 19H- CC, 14- 19 173. 24 193. 93 A. ingens Subzone b 1. 07- 1. 3 Chi 0. 83- 1. 92 20H- CC, 10- 17 182. 89 205. 32 A. ingens Subzone b 1. 3- 1. 8 21H- CC, 9- 16 193.33 217.03 A. ingens Subzone a 1. 3- 1. 8 22H- CC, 12- 18 202. 42 226. 75 NN19 >1. 46 A. ingens Subzone a 1. 3- 1. 8 Chi 0. 83- 1. 92 177- 1091E-1H- CC, 10- 15 4. 19 12. 31 NN21 <0. 26 T. lentiginosa Subzone c 0- 0. 18 2H- CC, 0- 10 9. 52 19. 54 T. lentiginosa Subzone c 0- 0. 18 Omega 0- 0.46 3H- CC, 10- 15 19. 46 28. 47 NN20? <0. 46 T. lentiginosa Subzone b 0. 18- 0. 42 4H- CC, 9- 14 27. 02 36. 02 T. lentiginosa Subzone b 0. 18- 0. 42 Omega 0- 0.46 5H- CC, 6- 11 39. 78 48. 43 T. lentiginosa Subzone b 0. 18- 0. 42 6H- CC, 12- 17 47. 17 60. 53 T. lentiginosa Subzone a 0. 42- 0. 65 Psi 0.46- 0. 83