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Table T4. Microfossil events, Site U1424.

Core, Section, interval (cm) Event
type
 Bioevents and epoch boundaries		 Age
(Ma)		 Depth CSF-A (m) Depth CCSF-A (m)
Top Bottom Top Bottom Midpoint ± Top Bottom Midpoint ±
346-U1424A- 346-U1424A-  
NA 1H-CC R LO Lychnocanoma sakaii 0.05 0 6.75 3.38 3.38 0.00 6.75 3.38 3.38
1H-CC 2H-CC R LO Spongodiscus sp. 0.29 6.75 16.40 11.58 4.83 6.75 17.17 11.96 5.21
4H-2W, 58−59 4H-2W, 135−136 PF LO Neogloboquadrina kagaensis group 0.70 27.88 28.65 28.27 0.38 31.18 31.95 31.57 0.39
5H-CC 5H-CC R FO and LO Eucyrtidium matuyamai 1.03−1.98 44.87 44.87 44.87 0.00 48.87 48.87 48.87 5.00
4H-CC 5H-CC R LO Axoprunum acquilonium 1.2−1.7 35.43 44.87 40.15 4.72 38.73 48.87 43.80 5.07
Pliocene/Pleistocene boundary 2.59                
8H-CC 9H-CC D LO Neodenticula kamtschatica 2.6−2.7 73.17 82.98 78.08 4.91 77.79 88.32 83.06 5.27
8H-CC 9H-CC R FO Cycladophora davisiana 2.7 73.17 82.98 78.08 4.91 77.79 88.32 83.06 5.27
8H-CC 9H-CC R LO Hexacontium parviakitaensis 2.7 73.17 82.98 78.08 4.91 77.79 88.32 83.06 5.27
12H-CC 13H-CC R FO Hexacontium parviakitaensis 3.9−4.3 111.48 121.07 116.28 4.79 117.53 127.85 122.69 5.16
13H-CC 14H-CC R RD Siphocampe arachnea group 4.46 121.07 130.50 125.79 4.72 127.85 137.83 132.84 4.99
14H-CC 15H-CC D FO Neodenticula koizumii 3.4−3.9 130.50 140.15 135.33 4.83 137.83 144.39 141.11 3.28
15H-CC 16H-CC R RI Siphocampe arachnea group 4.7 140.15 149.59 144.87 4.72 144.39 157.75 151.07 6.68

R = radiolarian, PF = planktonic foraminifer, D = diatom. LO = last occurrence, FO = first occurrence, RD = rapid decrease, RI = rapid increase.

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