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Table T9. Recognized nannofossil events and their depths, Site C0009. (See table notes.)

Zone
(base)
Nannofossil event Age
(Ma)
Degree of
reliability
Event top Event bottom Mean depth
MSF (m)
Cuttings
sample
Bottom
depth
MSF (m)*
Cuttings
sample
Bottom
depth
MSF (m)*
        319-C0009A-   319-C0009A-    
NN20 LO Pseudoemiliania lacunosa 0.436 B Above 2-SMW <712.7 Above 2-SMW <712.7 <712.7
  LCO Reticulofenestra asanoi 0.905 A 19-SMW 777.7 21-SMW 787.7 782.7
  LCO large Gephyrocapsa (>5.5 µm) 1.24 B 33-SMW 842.7 35-SMW 852.7 847.7
  LO Helicosphaera sellii 1.34 D 44-SMW 897.7 45-SMW 902.7 900.2
  LO Calcidiscus macintyrei (≥11 µm) 1.60 D 45-SMW 902.7 47-SMW 912.7 907.7
NN19 LO Discoaster brouweri 2.06 A 51-SMW 927.7 52-SMW 932.7 930.2
NN18 LO Discoaster pentaradiatus 2.393 A 56-SMW 952.7 57-SMW 957.7 955.2
NN17 LO Discoaster surculus 2.52 A 61-SMW 977.7 63-SMW 987.7 982.7
  LO Discoaster tamalis 2.87 A 77-SMW 1052.7 79-SMW 1062.7 1057.7
  LO Sphenolithus spp. 3.65 A 115-SMW 1232.7 117-SMW 1242.7 1237.7
NN16 LO Reticulofenestra pseudoumbilicus (>7 µm) 3.79 A 123-SMW 1272.7 125-SMW 1282.7 1277.7
NN12 LO Discoaster quinqueramus 5.59 A 125-SMW 1282.7 127-SMW 1292.7 1287.7
  PE Reticulofenestra pseudoumbilicus (>7 µm) 7.077 C 167-SMW 1482.7 169-SMW 1492.7 1487.7
  FCO Discoaster surculus 7.88 C Below base of section >1603.2
NN11 FO Discoaster berggrenii 8.52 D Below base of section >1603.2

Notes: * = Bottom depth is used for each cuttings sample representing a 5 m interval. LO = last occurrence, LCO = last consistent occurrence, RE = reentrance, PE = paracme end, FCO = first consistent occurrence, FO = first occurrence. Degree of reliability: A = distinct, well defined, and based on LO; B = indistinct and less well defined but based on LO; C = distinct and well defined but based on FO; D = indistinct, poorly defined, and based on FO or incomplete range (modified from Raffi et al., 2006, to accommodate the status of stratigraphic occurrence in cuttings at Site C0009).

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