Table T3. Estimated ages of diatom events used during Leg 186, based on the time scales of Cande and Kent (1995).
|
Event
|
Zone
(base) |
Age
(Ma) |
Reference
|
|
|---|---|---|---|---|
| LO | Proboscia curvirostris | NPD12 | 0.30 |
1
|
| LO | Thalassiosira jouseae | 0.30-0.41 |
2
|
|
| LO | Rhizosolenia matuyamai | 0.91-1.06 |
2
|
|
| FO | Rhizosolenia matuyamai | 0.99-1.14 |
2
|
|
| LCO | Actinocyclus oculatus | NPD11 | 1.01-1.46 |
2
|
| LO | Stephanopyxis horridus | 1.8-2.0 |
3
|
|
| LO | Thalassiosira antiqua | 1.52-1.8 |
2
|
|
| FO | Fragilariopsis doliolus | 2.0 |
3
|
|
| LO | Neodenticula koizumii | NPD10 | 2.0 |
1
|
| LO | Pyxidicula pustulata | 2.0-2.14 |
4
|
|
| LO | Thalassiosira convexa | 2.35 |
3
|
|
| LCO | Neodenticula kamtschatica | NPD9 | 2.61-2.68 |
2
|
| FO | Neodenticula seminae | 2.68 |
1
|
|
| LO | Thalassiosira marujamica | 3.08-3.2 |
5
|
|
| LO | Thalassiosira jacksonii | 3.08-3.41 |
1
|
|
| LO | Neodenticula koizumii | NPD8 | 3.53-3.95 |
2
|
| FO | Actinocyclus oculatus | 3.64-4.01 |
1
|
|
| FO | Thalassiosira latimarginata | 5.07 |
5
|
|
| FO | Thalassiosira oestrupii s.l. | NPD7Bb | 5.49 |
3
|
| LO | Thalassiosira miocenica | 6.0 |
2
|
|
| FO | Thalassiosira praeoestrupii | 6.1 |
5
|
|
| LCO | Rouxia californica | NPD7Ba | 6.65 |
6
|
| LO | Cavitatus jouseanus | 6.7-6.8 |
5
|
|
| FO | Nitzschia reinholdii | 7.4-7.5 |
5
|
|
| FO | Neodenticula kamtschatica | 7.3-7.4 |
5
|
|
| FO | Thalassionema schraderi | NPD7A | 7.6 |
5
|
| FO | Thalassiosira antiqua | 8.5 |
3
|
|
| LO | Denticulopsis katayamae | 8.5 |
3
|
|
| LCO | Denticulopsis simonsenii | NPD6B | 8.6 |
5
|
| LO | Denticulopsis dimorpha | NPD6A | 9.16 |
5
|
| FO | Denticulopsis katayamae | 9.26 |
5
|
|
| FO | Thalassionema schraderi | 9.5 |
5
|
|
| FO | Denticulopsis dimorpha | NPD5D | 9.9 |
5
|
| LO | Nitzschia heteropolica | 10.8-11.0 |
5
|
|
| LO | Mediaria splendida | 10.8-11.0 |
5
|
|
| LCO | Denticulopsis praedimorpha | NPD5C | 11.5 |
5
|
| FO | Proboscia barboi | 12.3 |
5
|
|
| LO | Crucidenticula nicobarica | 12.5 |
3
|
|
| FO | Denticulopsis praedimorpha | NPD5B | 12.9 |
7
|
| FCO | Denticulopsis simonsenii | NPD5A | 13.1 |
3
|
| FO | Denticulopsis simonsenii | NPD4Bb | 14.4-14.6 |
5
|
| FO | Denticulopsis hyalina | NPD4Ba | 14.9 |
5
|
| FO | Actinocyclus ingens v. nodus | 15.1 |
3
|
|
| FO | Denticulopsis lauta | NPD4A | 15.9 |
3
|
| FO | Denticulopsis praelauta | NPD3B | 16.3 |
3
|
| FO | Crucidenticula kanayae | NPD3A | 16.9 |
5
|
| FO | Crucidenticula sawamurae | NPD2B | 18.4 |
3
|
| FO | Thalassiosira fraga | NPD2A | 20.1 |
8
|
| FO | Thalassiosira praefraga | NPD1 | 24.0-24.3 |
8
|
Notes: LO = last occurrence, FO = first occurrence, LCO = last common occurrence, FCO = first common occurrence. References are as follows: 1 = Koizumi (1992); 2 = Koizumi and Tanimura (1985); 3 = Barron (1992); 4 = Barron (1980); 5 = Barron and Gladenkov (1995); 6 = Akiba (1986); 7 = Gersonde and Burckle (1990); 8 = Baldauf and Barron (1991).