Table T11. Datum events of radiolarians, diatoms, calcareous nannofossils, silicoflagellates, ebridians, dinoflagellates, and paleomagnetics, Hole U1341B. (See table notes.)
| Datum event |
Taxon/ magnetics |
Age (Ma) |
Depth CSF (m) |
|---|---|---|---|
| LO Lychnocanoma nipponica sakaii | Radiolarian | 0.05 | 4.4 |
| LO Amphimelissa setosa | Radiolarian | 0.08–1 | 13.7 |
| LO Spongodiscus sp. | Radiolarian | 0.28–0.32 | 42.4 |
| LO Axoprunum acquilonium | Radiolarian | 0.25–0.43 | 61.4 |
| LO Proboscia curvirostris | Diatom | 0.3 | 32.9 |
| LO Thalassirosira jouseae | Diatom | 0.3 | 32.9 |
| Brunhes/Matuyama | Paleomagnetic | 0.781 | 82.5 |
| LCO Actinocyclus oculatus | Diatom | 0.9 | 118.4 |
| LO Eucyrtidium matuyamai | Radiolarian | 0.9–1.5 | 108.9 |
| Jaramillo top | Paleomagnetic | 0.998 | 103.7 |
| Jaramillo bottom | Paleomagnetic | 1.072 | 138.0 |
| FO Eucyrtidium matuyamai | Radiolarian | 1.7–1.9 | 147.0 |
| RI Neodenticula seminae | Diatom | 1.778 | 245.5 |
| FO Proboscia curvirostris | Diatom | 1.7–2.0 | 162.5 |
| LO Pyxidicula horridus | Diatom | 1.9–2.0 | 204.9 |
| LO Ammodochium rectangulare | Ebridian | 1.9 | 233.4 |
| LO Thecosphaera akitaensis | Radiolarian | 2.4–2.7 | 414.1 |
| LO Ebriopsis antiqua antiqua | Ebridian | 2.47–2.48 | 330.6 |
| LO Distephanus jimlingii | Silicoflagellate | 2.52 | 340.5 |
| Gauss top | Paleomagnetic | 2.581 | 367.8 |
| FO Neodenticula koizumii | Diatom | 3.7–3.9 | 463.0 |
| LO Dictyophimus bullatus/Dictyophimus sp. B | Radiolarian | 3.8–4.0 | 597.1 |
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. LCO = last common occurrence, RI = rapid increase.
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