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Table T3. Biostratigraphic and magnetostratigraphic datums, Hole U1411B.

Datum tie
point 		Datum Datum type Zone Age
(Ma) 		Depth (mbsf)
Top Bottom Midpoint
D01 T Pseudoemiliania lacunosa Calcareous nannofossil NN20 0.44 0.89 0.89 0.89
D04 T Triquetrorhabdulus carinatus Calcareous nannofossil NN3 18.28 17.20 18.80 18.00
  T? Sphenolithus distentus Calcareous nannofossil NP25 26.84 48.95 58.42 53.68
  B Sphenolithus ciperoensis Calcareous nannofossil NP24 29.62 78.95 81.95 80.45
  B Sphenolithus distentus Calcareous nannofossil   30.00 91.20 94.20 92.70
  T Reticulofenestra umbilicus (>14 μm) Calcareous nannofossil NP23 32.02 97.70 102.12 99.91
D12 T Isthmolithus recurvus Calcareous nannofossil   32.49 102.12 105.36 103.74
  T Coccolithus formosus Calcareous nannofossil NP22 32.92 135.58 138.10 136.84
  T Discoaster saipanensis Calcareous nannofossil NP21 34.44 163.60 166.60 165.10
  T Discoaster barbadiensis Calcareous nannofossil     177.40 178.05 177.72
  Bc? Isthmolithus recurvus Calcareous nannofossil NP19/NP20 36.97 222.73 235.15 228.94
  Ta Cribrocentrum erbae Calcareous nannofossil   37.58 238.82 240.33 239.58
  Br Isthmolithus recurvus Calcareous nannofossil   37.64 249.98 251.24 250.61
  Ba Cribrocentrum erbae Calcareous nannofossil   38.07 252.77 253.53 253.15
  B Chiasmolithus oamaruensis Calcareous nannofossil NP18 38.03 254.46 254.46 254.46
D18 T Chiasmolithus grandis Calcareous nannofossil   37.98 252.77 253.53 253.15
D10 T Turborotalia ampliapertura Planktonic foraminifer O3/O2 30.28 86.59 96.25 91.42
  T Pseudohastigerina spp. Planktonic foraminifer O2/O1 32.10 115.35 124.43 119.89
  T Hantkenina albamensis Planktonic foraminifer O1/E16 33.89 156.71 158.21 157.46
D15 T Turborotalia cerroazulensis Planktonic foraminifer Within E16 34.03 159.71 161.21 160.46
  T Cribrohantkenina inflata Planktonic foraminifer Within E16 34.22 161.21 162.45 161.83
  T Globigerinatheka index Planktonic foraminifer E16/E15 34.61 162.45 172.38 167.41
D17 T Globigerinatheka semiinvoluta Planktonic foraminifer E15/E14 36.18 205.25 212.54 208.90
D02 C1n (Brunhes)/C1r.1r (Matuyama) Chron boundary   0.78     7.75
  C1r.1r (Matuyama)/C1r.1n (Jaramillo) Chron boundary   0.99     9.08
  C1r.1n (Jaramillo)/C1r.2r Chron boundary   1.07     9.65
  C1r.2r/C1r.2n (Cobb Mountain) Chron boundary   1.17     10.17
D03 C1r.2n (Cobb Mountain)/C1r.3r Chron boundary   1.19     10.37
D05 C8n.2n/C8r Chron boundary   25.99     25.91
D06 C8r/C9n Chron boundary   26.42     32.13
D07 C9n/C9r Chron boundary   27.44     54.41
  C9r/C10n.1n Chron boundary   27.86     59.10
  C10n.1n/C10n.1r Chron boundary   28.09     62.20
  C10n.1r/C10n.2n Chron boundary   28.14     63.44
D08 C10n.2n/C10r Chron boundary   28.28     65.41
D09 C11n.2n/C11r Chron boundary   29.97     82.59
D13 C12r/C13n Chron boundary   33.16     128.79
D14 C13n/C13r Chron boundary   33.71     144.15
D16 C13r/C15n Chron boundary   35.00     172.98

B = base, Br = base rare, Bc = Base common, Ba = base of acme, T = top, Ta = top of acme.

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