Table T8. Nannofossil events recognized, Site 1173.
|
Nannofossil
zones
|
Datum events
|
Age
(Ma) |
Depth
(mbsf) |
Average
sedimentation rate*
(m/m.y.)
|
|---|---|---|---|---|
| NN21b | FAD Emiliania huxleyi acme | 0.085 | 55.26 ± 9.38 | 506.9 |
| NN21a | FAD Emiliania huxleyi | 0.26 | 118.39 ± 0.53 | |
| NN20 | LAD Pseudoemiliania lacunosa | 0.46 | 128.56 ± 2.17 | 82.9 |
| LAD Reticulofenestra asanoi | 0.8 | 175.32 ± 2.83 | ||
| FAD Reticulofenestra asanoi | 1.06 | 203.44 ± 2.55 | ||
| LAD Helicosphaera sellii | 1.25 | 208.92 ± 2.93 | ||
| FAD Gephyrocapsa oceanica | 1.8 | 237.99 ± 2.65 | ||
| NN19 | LAD Discoaster brouweri | 1.95 | 262.84 ± 1.65 | |
| NN18 | LAD Discoaster pentaradiatus | 2.52 | 286.99 ± 1.50 | |
| NN17 | LAD Discoaster surculus | 2.55 | 286.99 ± 1.50 | |
| NN16 | LAD Reticulofenestra pseudoumbilicus (>7 µm) | 3.75 | 384.35 ± 0.22 | 33.6 |
| NN15 | LAD Amaurolithus spp. | 4.0 | 392.59 ± 1.50 | |
| NN12 | LAD Discoaster quinqueramus | 5.54 | 406.43 ± 1.24 | |
| NN11b | FAD Amaurolithus primus | 7.2 | 447.21 ± 0.86 | |
| NN11a | FAD Discoaster quinqueramus | 8.6 | 478.31 ± 3.75 | |
| NN10b | LAD Reticulofenestra pseudoumbilicus (>7 µm) | 9.0 | 490.50 ± 8.44 | |
| NN10a | LAD Discoaster hamatus | 9.63 | 515.84 ± 7.06 | |
| NN9 | FAD Discoaster hamatus | 10.7 | 539.62 ± 2.33 | |
| NN8 | FAD Catinaster coalitus | 10.9 | 549.34 ± 2.33 | |
| NN7 | FAD Discoaster kugleri | 11.8 | 575.75 ± 14.55 | |
| NN6 | LAD Sphenolithus heteromorphus | 13.6 | 646.35 ± 10.07 | |
| LAD Helicosphaera waltrans | 14.0 | 720.62 ± 4.90 | ||
| LAD Discoaster musicus | 14.1 | 720.62 ± 4.90 |
Notes: FAD = first appearance datum, LAD = last appearance datum. * = uncorrected for compaction.