Table T1.
Nannofossil, Foraminifer, Magnetochron and 40Ar/39Ar Datums, Holes 1115B and 1115C.
Datum event
Depth
(mbsf)
Age
(Ma)
Top Olduvai
90.5
1.77
Base Olduvai
102.5-103.5
1.95
LAD Discoaster brouweri
103.2-106.2
1.95
Top Reunion
118.0
2.14
Base Reunion
119.5
2.15
LAD Discoaster pentaradiatus
144.1-147.2
2.52
Gauss/Matuyama boundary
162.0
2.58
FAD Globorotalia truncatulinoides
166.2-169.2
2.70
40Ar/39Ar
169.3
2.77 ± 0.04
40Ar/39Ar
189.6
2.84 ± 0.03
Top Kaena
192.5
3.04
Base Kaena
202.0
3.11
40Ar/39Ar
243.4
3.23 ± 0.08
Gilbert/Gauss boundary
386.0-387.0
3.58
FAD Globorotalia crassaformis
407.3-412.1
3.80
LCO Reticulofenestra pseudoumbilicus
428.7-439.0
3.94
LAD Discoaster quinqueramus
514.3-516.4
5.54
Notes: LAD = last appearance datum, FAD = first appearance datum, LCO = last common occurrence.