Table T7. Datum events of radiolarians, diatoms, silicoflagellates, ebridians, dinoflagellates, and paleomagnetics, Hole U1340A. (See table notes.)
|
Datum event |
Taxon/ magnetics |
Age (Ma) |
Depth CSF (m) |
|---|---|---|---|
| LO Lychnocanoma nipponica sakaii | Radiolarian | 0.05 | 8.9 |
| LO Amphimelissa setosa | Radiolarian | 0.08–1 | 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 Dichtyocha subarctios | Silicoflagellate | 0.6–0.8 | 118.4 |
| Brunhes/Matuyama | Paleomagnetic | 0.781 | 117.9 |
| LCO Actinocyclus oculatus | Diatom | 0.9 | 161.2 |
| LO Eucyrtidium matuyamai | Radiolarian | 0.9–1.5 | 161.2 |
| Jaramillo top | Paleomagnetic | 0.998 | 146.4 |
| Jaramillo bottom | Paleomagnetic | 1.072 | 155.9 |
| LO Filisphaera filifera | Dinoflagellate | 1.4–1.7 | 206.0 |
| FO Eucyrtidium matuyamai | Radiolarian | 1.7–1.9 | 201.3 |
| Olduvai top | Paleomagnetic | 1.778 | 260.7 |
| Olduvai bottom | Paleomagnetic | 1.945 | 300.7 |
| FO Proboscia curvirostris | Diatom | 1.7–2.0 | 201.2 |
| LO Pyxidicula horridus | Diatom | 1.9–2.0 | 229.9 |
| Reunion top | Paleomagnetic | 2.128 | 343.2 |
| LO Thecosphaera akitaensis | Radiolarian | 2.4–2.7 | 267.9 |
| LO Ebriopsis antiqua antiqua | Ebridian | 2.47–2.48 | 305.5 |
| Gauss top | Paleomagnetic | 2.581 | 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. LCO = last common occurrence.
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