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Table T17. Datum tie points, Hole U1409A.

Datum
tie point
Datum Datum type Zone Age
(Ma)
Mid-point
depth
(mbsf)
Distance
(m)
Duration
(Ma)
LSR
(cm/k.y.)
Notes
D01 C1n (Brunhes)/C1r.1r (Matuyama) Chron boundary   0.78 8.97        
D02 T Discoaster brouweri Calcareous nannofossil NN19 1.93 13.25 3.68 1.15 0.32  
D03 C6Cr/C7n.1n Chron boundary   23.96 12.64 0.00 22.03 0.00 Hiatus
D04 C7n.1n/C7n.1r Chron boundary   24.00 12.74 0.10 0.04 0.26 Average rate = 0.26 cm/k.y.
D05 C7n.1r/C7n.2n Chron boundary   24.11 13.29 0.55 0.11 0.50
D06 C7n.2n/C7r Chron boundary   24.47 14.56 1.27 0.36 0.35
D07 C7r/C7An Chron boundary   24.76 15.89 1.34 0.29 0.47
D08 C7An/C7Ar Chron boundary   24.98 17.19 1.30 0.22 0.58
D09 C7Ar/C8n.1n Chron boundary   25.10 17.31 0.12 0.11 0.10
D10 C8n.1n/C8n.1r Chron boundary   25.26 18.34 1.04 0.16 0.63
D11 C8n.1r/C8n.2n Chron boundary   25.30 18.44 0.10 0.04 0.25
D12 C8n.2n/C8r Chron boundary   25.99 19.83 1.39 0.68 0.20
D13 C8r/C9n Chron boundary   26.42 20.19 0.36 0.43 0.08
D14 C10n.1n/C10n.1r Chron boundary   28.09 22.23 2.04 1.67 0.12
D15 C10n.1r/C10n.2n Chron boundary   28.14 22.37 0.14 0.05 0.26
D16 C10n.2n/C10r Chron boundary   28.28 22.69 0.32 0.14 0.24
D17 C10r/C11n.1n Chron boundary   29.18 25.62 2.93 0.91 0.32
D18 C11n.1n/C11n.1r Chron boundary   29.48 26.28 0.66 0.29 0.22
D19 C11n.1r/C11n.2n Chron boundary   29.53 26.46 0.18 0.05 0.36
D20 C11n.2n/C11r Chron boundary   29.97 27.23 0.77 0.44 0.17
D21 C11r/C12n Chron boundary   30.59 28.13 0.90 0.62 0.14
D22 C12n/C12r Chron boundary   31.03 28.65 0.52 0.44 0.12
D23 T Reticulofenestra umbilicus (>14 µm) Calcareous nannofossil NP23 32.02 33.35 4.70 0.99 0.48
D24 B Dictyococcites bisectus (>10 µm) Calcareous nannofossil   40.36 33.35 0.00 8.34 0.00 Hiatus
D25 C19r/C20n Chron boundary   42.30 46.25 12.90 1.94 0.66 Average rate = 0.80 cm/k.y.
D26 C20n/C20r Chron boundary   43.43 57.95 11.70 1.13 1.03
D27 C20r/C21n Chron boundary   45.72 87.99 30.05 2.29 1.31  
D28 C21n/C21r Chron boundary   47.35 101.35 13.36 1.62 0.82 Average rate = 0.65 cm/k.y.
D29 C21r/C22n Chron boundary   48.57 107.31 5.96 1.22 0.49
D30 C22n/C22r Chron boundary   49.34 111.08 3.77 0.78 0.49
D31 B Theocorys plesioanaclasta Radiolarian RP9 50.50 120.19 9.11 1.16 0.79
D32 T Buryella tetradica Radiolarian   50.87 125.50 5.31 0.37 1.44  
D33 B Buryella clinata Radiolarian RP8 53.35 145.96 20.46 2.48 0.82 Average rate = 0.82 cm/k.y.
D34 T Tribrachiatus contortus Calcareous nannofossil NP11 54.17 152.40 6.44 0.82 0.79
D35 T Fasciculithus spp. Calcareous nannofossil   55.64 154.27 1.86 1.47 0.13 Average rate = 0.23 cm/k.y.
D36 X Bekoma campechensisB. bidartensis Radiolarian RP7 58.23 161.65 7.38 2.59 0.28
D37 B Heliolithus cantabriae Calcareous nannofossil   59.60 186.20 24.56 1.37 1.80  
D38 B Morozovella angulata Planktonic foramiinifer P3/P2 62.29 198.88 12.68 2.69 0.47  

LSR = linear sedimentation rate. T = top, B = base, X = faunal crossover.

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