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Table T2. Datum events of radiolarians, calcareous nannofossils, diatoms, silicoflagellates, dinoflagellates, and ebridians, Holes U1341A, U1341B, and U1341C. (See table notes.)

Datum event Taxon Age
(Ma)
Depth (mbsf)
Hole
U1341A
Hole
U1341B
Hole
U1341C
LO Lychnocanoma nipponica sakaii Radiolarian 0.05 7.83 4.36 10.49
LO Amphimelissa setosa Radiolarian 0.08–1 7.83 13.65 20.18
LO Spongodiscus sp. Radiolarian 0.28–0.32 36.55 42.44 57.93
LO Axoprunum acquilonium Radiolarian 0.25–0.43 55.73 61.43
FO Emiliania huxleyi Calcareous nannofossil 0.29 34.41
LO Proboscia curvirostris Diatom 0.3 36.55 32.94 57.93
LO Thalassiosira jouseae Diatom 0.3 36.55 32.94
LO Proboscia barboi Diatom 0.3 36.55
LO Stylatractus universus Radiolarian 0.41–0.51 57.93
LO Pseudoemiliania lacunosa Calcareous nannofossil 0.44 53.52
LO Dictyocha subarctios Silicoflagellate 0.6–0.7 55.73
LCO Actinocyclus oculatus Diatom 0.9 131.68 118.42
LO Eucyrtidium matuyamai Radiolarian 0.9–1.5 122.40 108.92 143.42
LO Filisphaera filifera Dinoflagellate 1.4–1.7 202.99
FO Eucyrtidium matuyamai Radiolarian 1.7–1.9 141.17 147.02 161.85
RI Neodenticula seminae Diatom 1.778 245.51
FO Proboscia curvirostris Diatom 1.7–2.0 162.45
LO Stephanopyxis horridus Diatom 1.9–2.0 204.88
LCO Neodenticula koizumii Diatom 2.1 ± 0.1 207.88 204.88
LO Ammodochium rectangulare Ebridian 1.9 237.36 233.37
LO Thecosphaera akitaensis Radiolarian 2.4–2.7 414.12
LO Ebriopsis antiqua antiqua Ebridian 2.47–2.48 330.50 330.61
LO Distephanus jimlingii Silicoflagellate 2.52 337.54 340.53
LCO Neodenticula kamtschatica Diatom 2.7 362.20
FO Neodenticula koizumii Diatom 3.7–3.9 463.02
LO Dictyophimus bullatus/Dictyophimus sp. B Radiolarian 3.8–4.0 597.06

Notes: For first occurrences (FO), the depth was estimated as the midpoint between the depth at which the species was first observed and the depth of the next sample below. For last occurrences (LO), the depth was estimated as the midpoint between the depth at which the species was last observed and the depth of the next sample above. LCO = last common occurrence, RI = rapid increase, — = not applicable.

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