Table T2. Datum events of radiolarians, diatoms, silicoflagellates, ebridians, and dinoflagellates, Hole U1340A. (See table notes.)
| Datum event | Taxon |
Age (Ma) |
Depth (mbsf) |
|---|---|---|---|
| LO Lychnocanoma nipponica sakaii | Radiolarian | 0.05 | 8.9 |
| LO Amphimelissa setosa | Radiolarian | 0.08–1.0 | 8.9 |
| LO Spongodiscus sp. | Radiolarian | 0.28–0.32 | 18.7 |
| LO Axoprunum acquilonium | Radiolarian | 0.25–0.43 | 18.7 |
| LO Proboscia curvirostris | Diatom | 0.3 | 37.6 |
| LO Thalassiosira jouseae | Diatom | 0.3 | 37.6 |
| LO Proboscia barboi | Diatom | 0.3 | 37.6 |
| LO Dictyocha subarctios | Silicoflagellate | 0.6–0.8 | 118.4 |
| LO Actinocyclus oculatus | Diatom | 0.9 | 161.2 |
| LO Eucyrtidium matuyamai | Radiolarian | 0.9–1.5 | 161.2 |
| LO Filisphaera filifera | Dinoflagellate | 1.4–1.7 | 206.0 |
| RI Neodenticula seminae | Diatom | 1.778 | 260.7 |
| FO Eucyrtidium matuyamai | Radiolarian | 1.7–1.9 | 201.3 |
| FCO Proboscia curvirostris | Diatom | 1.7–2.0 | 201.2 |
| LO Stephanopyxis horridus | Diatom | 1.9–2.0 | 229.9 |
| FCO Neodenticula koizumii | Diatom | 2.1 ± 0.1 | 515.1 |
| LO Thecosphaera akitaensis | Radiolarian | 2.4–2.7 | 267.9 |
| LO Ebriopsis antiqua antiqua | Ebridian | 2.47–2.48 | 305.5 |
| LCO Neodenticula kamtschatica | Diatom | 2.7 | 486.2 |
| LO Phormostichoartus fistula | Radiolarian | 2.8–4.4 | 314.4 |
| FO Neodenticula koizumii | Diatom | 3.7–3.9 | 531.0 |
| LO Dictyophimus bullatus/Dictyophimus sp. B | Radiolarian | 3.8–4.0 | 531.0 |
Notes: For first occurrences (FO), the depth was estimated as the midpoint between the depth at which the species was first observed and the depth of the next sample below. For last occurrences (LO), the depth was estimated as the midpoint between the depth at which the species was last observed and the depth of the next sample above. FCO = first common occurrence, LCO = last common occurrence. RI = rapid increase.
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