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Table T4. Microfossil bioevents, Site U1426.

Core, Section, interval (cm)
Event
type		  

Bioevents and epoch boundaries
Age
(Ma)		 Depth CSF-A (m) Depth CCSF-A (m)
 
Comments
Top Bottom Top Bottom Midpoint ± Top Bottom Midpoint ±
346-U1426A- 346-U1426A-  
1H-CC 1H-CC R Stylochlamydium venustum Zone 0.012−0.014 2.42 2.42 2.42 0.00 2.59 2.59 2.59 0.00 Itaki and Ikehara, 2003
1H-CC 2H-CC R LO Amphimelissa setosa 0.08 2.42 12.11 7.27 4.85 2.59 12.81 7.70 5.11  
2H-6W, 75 2H-7W, 25 CN FO Emiliania huxleyi 0.29 10.75 11.75 11.25 0.50 11.45 12.45 11.95 0.50  
3H-CC 4H-CC R LO Spongodiscus sp. 0.29 22.05 31.60 26.83 4.78 23.17 33.61 28.39 5.22  
3H-CC 4H-CC PF FO and LO Globigerinoides ruber (pink) 0.12−0.4 22.05 31.60 26.83 4.78 23.17 33.61 28.39 5.22  
6H-2W, 90 6H-3W, 90 CN LO Pseudoemiliania lacunosa 0.44 41.57 42.98 42.28 0.70 46.20 47.61 46.91 0.71  
6H-CC 8H-CC PF LO Neogloboquadrina kagaensis group 0.7 50.38 68.95 59.67 9.29 55.01 73.53 64.27 9.26  
9H-8W 3 9H-CC CN LO Reticulofenestra asanoi 0.91 77.01 78.79 77.90 0.89 82.99 84.77 83.88 0.89  
12H-CC 13H-CC PF X Neogloboquadrina pachyderma (D to S) 1.14−1.24 107.32 117.66 112.49 5.17 116.91 127.45 122.18 5.27  
13H-7W, 75 13H-CC CN LO Helicosphaera sellii 1.34 116.08 117.66 116.87 0.79 125.87 127.45 126.66 0.79  
13H-CC 13H-CC R Eucyrtidium matuyamai 1.03−1.98 117.66 117.66 117.66 0.00 127.45 127.45 127.45 0.00 Occurrence interval
13H-CC 14H-2W, 75 CN Gephyrocapsa (>5.5 µm) 1.24−1.62 117.25 118.46 117.86 0.00 127.45 130.32 128.68 1.64 Occurrence interval
13H-CC 14H-CC D LO Neodenticula koizumii 2.0 117.66 127.14 122.40 4.74 127.45 139.00 133.22 5.77  
19H-CC 20H-CC R LO Axoprunum acquilonium 1.2−1.7 172.43 182.25 177.34 4.91 194.18 204.91 199.54 5.37  
20H-2W, 75 20H-3W, 75 CN LO Calcidiscus macintyrei 1.60 173.67 175.04 174.36 0.69 196.33 197.70 197.01 0.69  
24H-CC 25H-CC R LO Cycladophora sakaii 2.3 218.50 227.45 222.98 4.47 244.24 253.19 248.72 4.47  
Pliocene/Pleistocene boundary   2.59                  
28H-CC 29H-CC R FO Cycladophora davisiana 2.7 256.98 261.15 259.07 2.08 282.72 286.89 284.81 2.09  
29H-CC 30H-CC D FO Nodenticula seminae 2.4 261.15 265.84 263.50 2.34 286.89 291.58 289.24 2.34  
30H-CC 31H-CC R LO Hexacontium parviakitaensis 2.7 265.84 270.53 268.19 2.35 291.58 296.27 293.93 2.35  
32H-CC 33H-CC D LO Neodenticula kamtschatica 2.6−2.7 275.11 279.88 277.50 2.38 300.85 305.62 303.24 2.38  
40H-CC 41H-CC PF FO Globorotalia praeinflata 3.3 307.83 312.50 310.17 2.34 333.57 338.24 335.91 2.34  
41H-CC 42H-CC D FO Neodenticula koizumii 3.4−3.9 312.50 317.27 314.89 2.38 338.24 343.01 340.63 2.38  
47H-CC 48H-CC D LO Thalassiosira temperei 5.44 340.44 345.17 342.81 2.37 366.18 370.91 368.55 2.37  
51H-CC 52H-CC D FO Thalassiosira oestrupii 5.56 359.27 364.10 361.69 2.42 385.01 389.84 387.43 2.42  
55H-CC 56H-CC R FO Hexacontium parviakitaensis 3.9−4.3 378.14 382.72 380.43 2.29 403.88 408.46 406.17 2.29  
57H-CC 58H-CC R RI Siphocampe arachnea group 4.71 387.40 392.07 389.74 2.33 413.14 417.81 415.48 2.33  

R = radiolarian, F = foraminifer, CN = calcareous nannofossil, D = diatom. LO = last occurrence, F = first occurrence, RI = rapid increase.

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