Table T3. Summary of diatom and radiolarian biostratigraphic datums recognized and calibrated ages for each datum event, Hole 1166A.

Upper sample   Lower sample Event Taxon Constraint Calibrated
age
(Ma)
Core, section, interval (cm)
Interval depth
(mbsf)
Core, section, interval (cm)
Interval depth
(mbsf)
Diatoms:







188-1166A-

188-1166A-




1R-CC 3.02   13R-1, 70-71 114.00 LO Actinocyclus ingens < 0.66
1R-CC 3.02   13R-1, 70-71 114.00 LO Thalassiosira kolbei > 1.8-2.0
13R-1, 80-83 114.10   13R-1, 124-126 114.54 LO Thalassiosira vulnifica > 2.2-2.3
13R-2, 65-67 115.45   13R-CC 117.25 FO Thalassiosira vulnifica < 2.8-3.2
13R-CC 117.25   14R-CC 131.88 FO Thalassiosira elliptipora < 3.2
13R-CC 117.25   15R-3, 18-19 135.73 LO Hemiaulus caracteristicus > ~33
17R-2, 58-59 153.48   — — LO (absence) middle Eocene taxa < ~37
Radiolarians:
 





188-1166A-
  188-1166A-




— 0.00   1R-2, 72-73 2.22 LO Pterocanium c. trilobum < 0.83
— 0.00   1R-2, 72-73 2.22 LO Cycladophora pliocenica < ~1.35
1R-2, 72-73 2.22   13R-1, 150-151 114.77 FO Lithelium nautiloides > 1.93
1R-2, 72-73 2.22   13R-1, 150-151 114.77 FO Triceraspyris antarctica > 1.93
1R-2, 72-73 2.22   13R-1, 150-151 14.77 LO Antarctissa strelkovi < ~2.4
13R-2, 5-6 114.83   — — FO Antarctissa strelkovi > ~6.1

Notes: Sample designations and depths in bold type represent the occurrence of each taxon, and plain type represents sample-spacing uncertainty for each datum. LO = last occurrence, FO = first occurrence. — = upper or lower interval not recognized because of poor preservation or absence.