Table 2. Microfossil datums at Holes 1075A, 1075B, and 1075C.
Fossil group
Event
Age
(Ma)
Zone (base)
Core, section, interval (cm)
Depth (mbsf)
A
B
Top
Bottom
Top
Bottom
Mean





175-1075A- 175-1075A-


N FO Emiliania huxleyi acme 0.09 NN21b
2H-CC 3H-5, 138 11.23 18.38 14.8
N FO Emiliania huxleyi 0.26 NN21a CN15 5H-CC 6H-3, 1 39.95 42.60 41.3
N LO Gephyrocapsa caribbeanica acme 0.26 NN21a CN15 5H-CC 6H-3, 1 39.95 42.60 41.3
N LO Pseudoemiliania lacunosa 0.46 NN20 CN14b 7H-3, 10 7H-CC 52.13 59.05 55.6
R LO Axoprunum angelinum 0.46

5H-CC 6H-CC 39.95 49.45 44.7
N LO Reticulofenestra asanoi 0.83

11H-CC 12H-3, 33 97.12 99.83 98.5
D LO Nitzschia fossilis 0.92

12H-CC 13H-CC 106.84 116.19 111.5
N FO Reticulofenestra asanoi 1.06

12H-CC 13H-CC 106.84 116.19 111.5
R LO Lamprocyrtis neoheteroporos 1.07

12H-CC 13H-CC 106.84 116.19 111.5
N LO Helicosphaera sellii 1.25

15H-6, 40 17H-6, 130 131.38 152.80 142.1





175-1075B- 175-1075B-


N LO Helicosphaera sellii 1.25

14H-CC 16H-CC 129.07 148.35 138.7
N LO Calcidiscus macintyrei 1.67

17H-CC 18H-CC 157.72 167.54 162.6





175-1075C- 175-1075C-


N LO Discoaster brouweri 1.95 NN19 CN13a Not sampled 22H-CC No data 208.09 <208.1

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