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Table T22. Constrained tie points for depth-age relationship, Site U1425.


Selected ties for
depth-age lines

Event
type


Bioevents and epoch boundaries

Depth
CCSF-A(m)

Depth range
(±)

Age
(Ma)

Age range
(±)
Sedimentation
rate
(m/m.y.)
Core top                         0.00   0.000    
R LO Lychnocanoma sakaii 4.39 4.39 0.050 0.000 40.9
CN FO Emiliania huxleyi 8.78 2.67 0.290 0.000  
R LO Spongodiscus sp. 13.96 5.19 0.290 0.000  
CN LO Pseudoemiliania lacunosa 21.40 0.44 0.440 0.000  
PF LO Neogloboquadrina kagaensis 34.15 5.53 0.700 0.000  
PM Bottom of C1n (Brunhes/Matuyama) 36.54 0.73 0.781 0.000  
PM Top of C1r.1n (Jaramillo) 41.59 0.02 0.988 0.000  
PM Bottom of C1r.1n (Jaramillo) 43.69 0.12 1.072 0.000  
PF Neogloboquadrina pachyderma (S to D) 44.53 4.85 1.190 0.050  
T Om-SK110 47.10 0.01 1.600 0.000  
Unit IA/IB     50.94   1.244    
R LO Axoprunum acquilonium 55.00 5.63 1.450 0.250 32.6
CN LO Calcidiscus macintyrei 59.38 1.25 1.600 0.000  
PM Top of C2n (Olduvai) 60.49 1.40 1.778 0.000  
PM Bottom of C2n (Olduvai) 74.35 0.53 1.945 0.000  
D LO Neodenticula koizumii 76.16 5.26 2.000 0.000  
R LO Hexacontium parviakitaensis 76.16 5.26 2.700 0.000  
R FO Cycladophora davisiana 86.59 5.18 2.700 0.000  
PM Top of C2An.1n (Matuyama/Gauss) 91.42 0.66 2.581 0.000  
D LO Neodenticula kamtschatica 95.41 3.63 2.700 0.000  
Unit IB/IIA     99.09   2.722    
PF FO Globorotalia praeinflata 110.57 0.97 3.300 0.000 25.7
D FO Neodenticula koizumii 110.57 0.97 3.650 0.250  
T Znp-Ohta 124.09 0.01 3.900 0.000  
PF LO Globorotalia ikebei 124.63 2.33 4.300 0.000  
PF FO Globorotalia ikebei 129.51 2.56 4.750 0.050  
R FO Hexacontium parviakitaensis 129.51 2.56 4.100 0.200  
R LO Dictyophimus bullatus 134.52 2.44 4.100 0.200  
Unit IIA/IIB             137.02   4.200    
R FO Dictyophimus bullatus 147.64 4.41 4.400 0.000 41.7
R RI Siphocampe arachnea group 157.41 5.36 4.710 0.000  
R LO Lipmanella redondoensis 157.41 5.36 5.060 0.000  
D LO Thalassiosira jacksonii 167.66 4.88 4.810 0.000  
Biostrat         182.94   5.300    
R FO Larcopyle pylomaticus 187.70 4.76 5.300 0.000 25.8
R LO Lychnocanoma parallelipes 198.04 5.58 6.100 0.000  
Biostrat               203.61   6.100    
R RI Lithelius barbatus 235.20 4.34 7.000 0.000 44.7
R FO Axoprunum acquilonium 235.20 4.34 7.000 0.000  
D LO Thalassiosira schraderi 248.91 4.38 7.670 0.000  
R LO Cycladophora nakasekoi 258.66 5.38 7.400 0.000  
R FO Lychnocanoma parallelipes 258.66 5.38 7.400 0.000  
Unit IIB/IIIA           262.53   7.419    
D LO Denticulopsis katayamae 323.13 2.29 8.700 0.000 44.7
R LCO Lychnocanoma magnacornuta 332.90 2.84 9.100 0.000  
D LO Denticulopsis dimorpha 349.58 2.81 9.300 0.000  
Unit IIIA/IIIB         356.83   9.528    
R FO Lychnocanoma magnacornuta (flow-in) 393.00 2.04 10.100 0.000 64.8
R RD Cyrtocapsella tetrapera (flow-in) 405.35 0.72 12.600 0.000  
Biostrat         393.88   10.100    
R FO Cycladophora nakasekoi (flow-in at bottom) 405.93 12.05 10.100 0.000  
R LO Eucyrtidium inflatum (flow-in at bottom) 405.93 12.05 11.800 0.000  

R = radiolarian, PF = planktonic foraminifer, CN = calcareous nannofossil, D = diatom, PM = paleomagnetism, T = tephra, LCO = last common occurrence. LO = last occurrence, FO = first occurrence, RI = rapid increase, RD = rapid decrease. S to D = sinistral to dextral coiling.

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