Table 3. Microfossil datums at Hole 1084A.

Fossil
group
Event
Age
(Ma)
Zone (base)
Core, section, interval (cm)
Depth (mbsf)
A
B
Top
Bottom
Top
Bottom
Mean





175-1084A- 175-1084A-


N FO Emiliania huxleyi 0.26 NN21a CN15 6H-5, 110 6H-6, 110 47.90 49.40 48.65
N LO Gephyrocapsa caribbeanica acme 0.26 NN21a CN15 6H-5, 110 6H-6, 110 47.90 49.40 48.65
N LO Pseudoemiliania lacunosa 0.46 NN20 CN14b 9H-5, 110 9H-CC 76.50 79.35 77.93
R LO Axoprunum angelinum 0.46

8H-CC 9H-CC 70.02 79.55 74.79
N LO Small Gephyrocapsa acme (Weaver, 1993) 0.60

11H-6, 100 11H-CC 95.67 98.69 97.18
D LO Nitzschia reinholdii 0.69

10H-CC 11H-CC 89.03 98.69 93.86
S LO Bachmannocena quadrangula 0.80

15H-CC 16H-CC 136.63 143.12 139.88
N LO Reticulofenestra asanoi 0.83

16H-2, 130 16H-4, 140 138.80 141.90 140.35
N LO Small Gephyrocapsa acme (Gartner, 1977) 0.96

21X-CC 22X-CC 180.33 182.33 181.33
N FO Reticulofenestra asanoi 1.06

24X-5, 40 24X-CC 206.13 206.98 206.56
R LO Lamprocyrtis neoheteroporos 1.07

21X-CC 22X-CC 180.33 182.33 181.33
N LO Helicosphaera sellii 1.25

27X-2, 140 27X-4, 140 231.52 233.81 232.67
N LO Calcidiscus macintyrei 1.67

32X-4, 40 32X-CC 282.14 283.18 282.66
D LO Proboscia barboi 1.68

29X-CC 30X-CC 254.47 265.89 260.18
R LO Cycladophora pliocenica 1.83

32X-CC 33X-CC 283.18 294.69 288.94
D LO Fragilariopsis doliolus 1.88

30X-CC 31X-CC 265.89 271.74 268.82
N LO Discoaster brouweri 1.95 NN19 CN13a 34X-CC 36X-CC 304.37 322.77 313.57
D LO Thalassiosira kolbei 1.96

32X-CC 33X-CC 283.18 294.69 288.94
N LO Discoaster surculus 2.55 NN17 CN12c 46X-CC 47X-CC 422.12 429.04 425.58
R FO Cycladophora davisiana 2.70

48X-CC 49X-CC 439.49 450.97 445.23
D FO Rhizosolenia praebergonii 3.12

51X-CC 52X-CC 469.88 477.83 473.86
N LO Reticulofenestra pseudoumbilicus 3.82 NN16 CN12a 60X-4, 108 60X-4, 114 552.88 552.94 552.91
N LO Amaurolithus tricorniculatus 4.50 NN15 CN11 61X-CC 62X-CC 564.94 576.57 570.76

Notes: Fossil group: N = calcareous nannofossils, R = radiolarians, D = diatoms, S = silicoflagellates. 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).