Table T8. Nannofossil events recognized, Site 1177.
|
Nannofossil
zones
|
Datum events
|
Age
(Ma) |
Depth
(mbsf) |
Average
sedimentation rate†
(m/m.y.)
|
|---|---|---|---|---|
| NN19 | LAD Discoaster brouweri | 1.95 | 308.65 | 28.19 |
| NN18 | LAD Discoaster pentaradiatus | 2.52 | 331.05 ± 6.19 | |
| NN17 | LAD Discoaster surculus | 2.55 | 357.09 ± 5.46 | |
| NN14 | LAD Amaurolithus spp. | 4.0 | 399.50 ± 19.15 | |
| NN11b | LAD Discoaster quinqueramus* | 5.60 | 425.99 ± 7.34 | |
| LAD Discoaster bergenii* | 7.80 | 502.30 ± 8.54 | ||
| NN10b | LAD Reticulofenestra pseudoumbilicus (>7 µm)* | 9.0 | 526.92 ± 13.68 | |
| LAD Coccolithus miopelagicus* | 10.9 | 598.55 ± 0.06 | ||
| LAD Discoaster kugleri* | 11.8 | 637.58 ± 0.88 | ||
| NN5 | LAD Sphenolithus heteromorphus* | 13.6 | 672.48 ± 3.03 | |
| NN4 | LAD Helicosphaera ampliaperta | 15.6 | 745.69 ± 1.32 | |
| LAD Discoaster druggii* | 18.6 | 795.57 ± 20.93 |
Notes: FAD = first appearance datum, LAD = last appearance datum. † = uncorrected for compaction. * = used for calculating average sedimentation rate.