|
Zonal boundary
|
Age by B95*
(Ma)
|
Age by CP97† (Ma)
|
Age difference (Ma)
|
Site 1148 depth (mcd)
|
Site 1146 depth (mcd)
|
|---|---|---|---|---|---|
| N18/N19 | 4.7 | 5.54 | +0.84 | 188 | 328 |
| N17/N18 | 5.6 | 5.82 | +0.22 | 196 | 352 |
| N16/N17 | 8.3 | 8.58 | +0.28 | 244 | 408 |
| N15/N16 | 10.9 | 9.82 | –1.08 | 260 | 426 |
| N14/N15 | 11.4 | 10.49 | –0.91 | 275 | 445 |
| N13/N14 | 11.8 | 11.19 | –0.61 | 284 | 475 |
| N12/N13 | 12.3 | 11.68 | 0.62 | — | 482 |
| N11/N12 | 12.5 | 13.42 | 0.9 | 303 | 506 |
| N10/N11 | 12.7 | 14 | 1.3 | 309 | 519 |
| N9/N10 | 14.8 | — | — | 312 | 523 |
| N8/N9 | 15.1 | — | — | 320 | 540 |
| N7/N8 | 16.4 | — | — | 355 | 600 |
| N6/N7 | 17.3 | — | — | 365 | 616 |
| N5/N6 | 18.8 | — | — | 367‡ | — |
| N4/N5 | 21.5 | — | — | 409 | — |
| P22/N4 | 23.8 | — | — | 460 | — |
Notes: * = ages by Berggren et al. (1995), † = ages adjusted by Chaisson and Pearson (1997) and Pearson and Chaisson (1997). At Site 1148, the Zone N12/N13 boundary is undecided, and the Zone N6/N7 boundary at 367 mcd (‡) is estimated to be ~18 Ma on the local FO of Globigerinatella insueta (Table T1). Site 1146 data are from Wang (2001).