Table T9. Recognized nannofossil events, Hole C0008A. (See table notes.)
Epoch | Nannofossil zone |
Age (Ma) |
Nannofossil event | Top | Bottom | Mean depth CSF (m) |
||
---|---|---|---|---|---|---|---|---|
Core, section, interval (cm) |
Depth CSF (m) |
Core, section, interval (cm) |
Depth CSF (m) |
|||||
316-C0008A- | 316-C0008A- | |||||||
Pleistocene | NN21 | 0.063 | Gephyrocapsa spp. (>3.5 µm)–Emiliania huxleyi | 1H-CC, 0–5 | 6.83 | 2H-CC, 4–9 | 17.01 | 11.92 |
Repeated NN19? | 1.078 | FCO Reticulofenestra asanoi | 2H-CC, 4–9 | 17.01 | 3H-CC, 0–5 | 25.62 | 21.31 | |
1.24 | LO Gephyrocapsa spp. (>5.5 µm) | 4H-CC, 6.5–11.5 | 35.53 | 5H-CC, 0–5 | 44.80 | 40.16 | ||
1.34 | LO Helicosphaera sellii | 5H-CC, 0–5 | 44.80 | 6H-CC, 56.5–61.5 | 54.82 | 49.81 | ||
1.46 | FCO Gephyrocapsa spp. (>5.5 µm) | 8H-CC, 0–5 | 72.13 | 9H-CC, 0–5 | 78.50 | 75.31 | ||
1.6 | LO Calcidiscus macintyrei (≥11 µm) | 9H-CC, 0–5 | 78.50 | 10H-CC, 0–5 | 90.39 | 84.44 | ||
NN19 | 1.24 | LO Gephyrocapsa spp. (>5.5 µm) | 9H-CC, 0–5 | 78.50 | 10H-CC, 0–5 | 90.39 | 84.44 | |
1.34 | LO Helicosphaera sellii | 10H-CC, 0–5 | 90.39 | 11H-CC, 0–5 | 100.54 | 95.46 | ||
1.46 | FCO Gephyrocapsa spp. (>5.5 µm) | 19H-CC, 12.5–17.5 | 152.69 | 20H-CC, 0–5 | 158.53 | 155.61 | ||
1.6 | LO Calcidiscus macintyrei (≥11 µm) | 22H-CC, 5–10 | 178.54 | 23H-CC, 7.5–12.5 | 186.21 | 182.37 | ||
1.67 | FO Gephyrocapsa spp. (>3.5 µm) | 30X-5, 60 | 238.91 | 30X-CC, 0–5 | 242.71 | 240.81 | ||
Pliocene | NN18 | 2.135 | AB Discoaster triradiatus | 31X-CC, 0–5 | 254.10 | 32X-5, 77 | 259.22 | 256.66 |
NN17 | 2.393 | LO Discoaster pentaradiatus | 33X-3, 25 | 265.64 | 33X-CC, 0–5 | 269.64 | 267.64 | |
NN16 | 2.87 | LO Discoaster tamalis | 34X-CC, 0–5 | 272.86 | 35X-1, 2 | 281.78 | 277.32 | |
3.65 | LO Sphenolithus spp. | 35X-CC, 34–39 | 282.35 | 36X-CC, 18–23 | 291.69 | 287.02 | ||
Miocene? | NN11? Falling? | 5.59 | LO Discoaster quinqueramus | 38X-CC, 0–5 | 310.74 | 40X-CC, 10–11 | 329.36 | 320.05 |
Notes: CSF = core depth below seafloor. FCO = first consistent occurrence, LO = last occurrence, FO = first occurrence, AB = acme beginning.
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