Table T6. Calcareous nannofossil, planktonic and benthic foraminifer, diatom, and radiolarian biostratigraphic events, Hole U1312B.
| Core, section |
Zone* (base) |
Species event | Depth* (mbsf) |
Age (Ma) |
|---|---|---|---|---|
| 306-U1312B- | ||||
| 1H-CC | NN21 | FO Emiliania huxleyi | 8.65 | 0.25 |
| 2H-CC | NN20 | LO Pseudoemiliania lacunosa | 8.65 | 0.41 |
| 3H-CC | LO Fragilariopsis reinholdii | 18.15 | 0.50 | |
| 2H-CC | NN19 | FO Gephyrocapsa parallela | 18.15 | 0.95 |
| 4H-CC | LO Helicosphaera sellii | 27.65 | 1.27 | |
| 4H-CC | FO Gephyrocapsa caribbeanica | 37.15 | 1.73 | |
| 4H-CC | NN18 | FO Globorotalia inflata | 37.15 | 2.08 |
| 4H-CC | LO Discoaster brouweri | 27.65 | 1.97 | |
| 4H-CC | NN17 | LO Discoaster pentaradiatus | 27.65 | 2.38 |
| 4H-CC | NN16 | FO Cycladophora davisiana | 37.15 | 2.59 |
| 5H-CC | LO Discoaster surculus | 37.15 | 2.54 | |
| 5H-CC | LO Globorotalia puncticulata | 37.15 | 2.41 | |
| 5H-CC | LO Discoaster tamalis | 37.15 | 2.74 | |
| 7H-CC | LO Sphaeroidinellopsis seminulina | 56.15 | 3.19 | |
| 8H-CC | Reappearance Globorotalia puncticulata | 84.65 | 3.31 | |
| 12H-CC | NN15 | Disappearance Globorotalia puncticulata | 103.65 | 3.57 |
| 13H-CC | LO Reticulofenestra pseudoumbilicus | 113.15 | 3.85 | |
| 13H-CC | NN12/NN13/NN14 | LcO Globorotalia margaritae | 113.15 | 3.98 |
| 14H-CC | FaO Globorotalia puncticulata/Globorotalia crassaformis | 132.15 | 4.52 | |
| 15H-CC | LO Amaurolithus primus | 132.15 | 4.56 | |
| 19H-CC | NN11D | LO Discoaster quinqueramus | 170.15 | 5.54 |
| 18H-CC | FaO Globorotalia margaritae | 170.15 | 6.00 | |
| 19H-CC | NN11C | Coiling change Neogloboquadrina pachyderma (s/d) | 170.15 | 6.30 |
| 19H-CC | NN11A | FO Amaurolithus primus | 179.65 | 7.39 |
| 20H-CC | FcO gr. Globorotalia miotumida | 179.65 | 7.24 | |
| 20H-CC | NN10B | LO Globorotalia menardii 4 | 179.65 | 7.51 |
| 20H-CC | Coiling change Neogloboquadrina pachyderma (d/s) | 179.65 | 7.80 | |
| 20H-CC | FO Discoaster berggrenii | 189.15 | 8.28 | |
| 20H-CC | FO Discoaster loeblichii | 189.15 | 8.43 | |
| 22H-CC | NN10A | LO Globorotalia lenguaensis | 198.65 | 8.99 |
| 21H-CC | FO Minylitha convallis | 198.65 | 9.43 | |
| 22H-CC | NN9 | LO Discoaster hamatus | 198.65 | 9.64 |
| 24H-CC | NN8 | FO Discoaster hamatus | 227.15 | 10.48 |
| 25H-CC | FcO Neogloboquadrina pachyderma morphotype acostaensis | 227.15 | 10.50 | |
| 25H-CC | NN7 | LO Coccolithus miopelagicus | 227.15 | 10.95 |
Notes: Dark blue = nannofossils, pink = foraminifers, light blue = diatoms, orange = radiolarians. For first occurrences (FO), depth is plotted as the midpoint between the depth at which the species was first observed and the depth of the sample below. For last occurrences (LO), depth is plotted as the midpoint between the depth at which the species was last observed and the depth of the sample above. FaO = first abundant occurrence, FcO = first common occurrence, LcO = last common occurrence. d = dextral, s = sinistral. * = from Martini (1971).
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