Table 2. Microfossil datums at Hole 1081A.
Fossil group
Event
Age
(Ma)
Zone (base)
Core, section, interval (cm)
Depth (mbsf)
A
B
Top
Bottom
Top
Bottom
Mean





175-1081A- 175-1081A-


N FO Emiliania huxleyi acme 0.09 NN21b
2H-1, 100 2H-4, 90 2.00 6.40 4.20
N FO Emiliania huxleyi 0.26 NN21a CN15 3H-CC 4H-3, 80 20.05 23.80 21.93
N LO Gephyrocapsa caribbeanica acme 0.26 NN21a CN15 3H-CC 4H-3, 80 20.05 23.80 21.93
N LO Pseudoemiliania lacunosa 0.46 NN20 CN14b 4H-CC 5H-2, 120 29.93 32.20 31.07
R LO Axoprunum angelinum 0.46

2H-CC 5H-CC 8.22 39.12 23.67
N LO Small Gephyrocapsa acme (Weaver, 1993) 0.60

5H-CC 6H-3, 50 39.12 42.50 40.81
S LO Bachmannocena quadrangula 0.80

5H-CC 6H-CC 39.12 48.52 43.82
N LO Reticulofenestra asanoi 0.83

7H-3, 30 7H-6, 30 51.80 56.20 54.00
N LO Small Gephyrocapsa acme (Gartner, 1977) 0.96

8H-3, 98 8H-5, 130 61.98 65.20 63.59
R LO Lamprocyrtis neoheteroporos 1.07

6H-CC 7H-CC 48.52 58.03 53.28
D LO Rhizosolenia matuyama 1.10

9H-2, 80 9H-4, 80 69.80 72.70 71.25
N LO Helicosphaera sellii 1.25

10H-3, 60 10H-CC 80.60 86.31 83.46
D LO Rhizosolenia praebergonii var. robusta 1.65

11H-CC 12H-1, 90 96.12 96.90 96.51
N LO Calcidiscus macintyrei 1.67

12H-CC 13H-4, 70 105.05 110.70 107.88
D LO Proboscia barboi 1.68

12H-CC 13H-1, 70 105.05 106.20 105.63
R LO Cycladophora pliocenica 1.83

13H-CC 14H-CC 114.87 124.50 119.69
N LO Discoaster brouweri 1.95 NN19 CN13a 18H-1, 93 18H-4, 80 146.93 151.25 149.09
D LO Thalassiosira convexa 2.19

19H-CC 20X-3, 125 164.17 168.35 166.26
N LO Discoaster surculus 2.55 NN17 CN12c 23X-5, 80 23X-CC 199.90 201.81 200.86
R FO Cycladophora davisiana 2.70

19X-CC 20X-CC 164.17 172.90 168.54
N LO Reticulofenestra pseudoumbilicus 3.82 NN16 CN12a 26X-CC 27X-2, 140 228.28 234.40 231.34
R FO Spongurus pylomaticus 5.20

33X-CC 34X-CC 298.07 302.14 300.11
N LO Discoaster quinqueramus 5.54 NN12 CN10a 34X-CC 35X-2, 120 302.14 311.30 306.72
N FO Discoaster quinqueramus 8.60 NN11 CN9a 47X-4, 30 47X-6, 30 429.00 432.00 430.50

Notes: Fossil group: N = calcareous nannofossils, R = radiolarians, S = silicoflagellates, D = diatoms. FO = first occurrence and LO = last occurrence. Zonal codes refer to the standard calcareous nannofossil zonations of (A) Martini (1971) and (B) Okada and Bukry (1980).