Table T4. Age estimates of diatom datum events considered for Expedition 346.
| Diatom and species | Age in Yanagisawa and Akiba (1998) (Ma) |
Age converted Gradstein et al., 2012 (Ma) |
Zone (base) |
Reference |
|---|---|---|---|---|
| LO Proboscia curvirostis | 0.31 | 0.31 | NPD 12 | Yanagisawa and Akiba, 1998 |
| LO Actinocyclus oculatus | 1.10 | 1.10 | NPD 11 | Yanagisawa and Akiba, 1998 |
| LO Neodenticula koizumii | 2.00 | 2.00 | NPD 10 | Yanagisawa and Akiba, 1998 |
| FO Neodenticula seminae | 2.40 | 2.40 | ||
| LO Neodenticula kamtschatica | 2.6–2.7 | 2.60–2.70 | NPD 9 | Yanagisawa and Akiba, 1998 |
| FO Neodenticula koizumii | 3.5–3.9 | 3.40–3.93 | NPD 8 | |
| FO Actinocyclus oculatus | 4.00 | 4.03 | ||
| LO Thalassiosira jacksonii (plicate) | 4.80 | 4.81 | Yanagisawa and Akiba, 1998 | |
| FO Thalassiosira jacksonii (plicate) | 5.20 | 5.21 | Yanagisawa and Akiba, 1998 | |
| LO Thalassiosira temperei | 5.40 | 5.44 | Yanagisawa and Akiba, 1998 | |
| FO Shionodiscus oestrupii | 5.50 | 5.56 | NPD 7Bb | Yanagisawa and Akiba, 1998 |
| FO Thalassiosira praeoestrupii | 6.10 | 6.22 | Yanagisawa and Akiba, 1998 | |
| LCO Rouxia californica | 6.40 | 6.57 | NPD 7Ba | Yanagisawa and Akiba, 1998 |
| FCO Neodenticula kamtschatica | 6.40 | 6.57 | Yanagisawa and Akiba, 1998 | |
| LCO Thalassionema schraderi | 7.60 | 7.67 | NPD 7A | Yanagisawa and Akiba, 1998 |
| LO Denticulopsis katayamae | 8.50 | 8.70 | NPD 6B | Yanagisawa and Akiba, 1998 |
| LO Denticulopsis dimorpha | 9.20 | 9.30 | NPD 6A | Yanagisawa and Akiba, 1998 |
| FO Denticulopsis dimorpha v. dimorpha | 10.00 | 9.70 | NPD 5D | Yanagisawa and Akiba, 1998 |
| LCO Denticulopsis hustedii | 10.10 | 10.20 | Yanagisawa and Akiba, 1998 | |
| LCO Denticulopsis praedimorpha | 11.50 | 11.50 | NPD 5C | Yanagisawa and Akiba, 1998 |
| FO Denticulopsis praedimorpha v. minor | 12.90 | 12.70 | NPD 5B | Yanagisawa and Akiba, 1998 |
| FCO Denticulopsis simonsenii | 13.10 | 13.10 | Yanagisawa and Akiba, 1998 | |
| LCO Denticulopsis hyalina | 13.10 | 13.10 | NPD 5A | Yanagisawa and Akiba, 1998 |
| FO Denticulopsis simonsenii | 14.5–14.6 | 13.80 | NPD 4Bb | Yanagisawa and Akiba, 1998 |
| FO Denticulopsis hyalina | 14.90 | 14.40 | NPD 4Ba | Yanagisawa and Akiba, 1998 |
| FO Denticulopsis lauta | 15.90 | 15.90 | NPD 4A | Yanagisawa and Akiba, 1998 |
LO = last occurrence, FO = first occurrence, LCO = last common occurrence, FCO = first common occurrence. Bold = primary Neogene North Pacific diatom biohorizons, regular = secondary Neogene North Pacific diatom biohorizons used (see Yanagisawa and Akiba, 1998, for a complete list).
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