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Table T11. Datum events of radiolarians, diatoms, calcareous nannofossils, silicoflagellates, ebridians, dinoflagellates, and paleomagnetics, Hole U1341B. (See table notes.)

Datum event Taxon/
magnetics
Age
(Ma)
Depth
CSF (m)
LO Lychnocanoma nipponica sakaii Radiolarian 0.05 4.4
LO Amphimelissa setosa Radiolarian 0.08–1 13.7
LO Spongodiscus sp. Radiolarian 0.28–0.32 42.4
LO Axoprunum acquilonium Radiolarian 0.25–0.43 61.4
LO Proboscia curvirostris Diatom 0.3 32.9
LO Thalassirosira jouseae Diatom 0.3 32.9
Brunhes/Matuyama Paleomagnetic 0.781 82.5
LCO Actinocyclus oculatus Diatom 0.9 118.4
LO Eucyrtidium matuyamai Radiolarian 0.9–1.5 108.9
Jaramillo top Paleomagnetic 0.998 103.7
Jaramillo bottom Paleomagnetic 1.072 138.0
FO Eucyrtidium matuyamai Radiolarian 1.7–1.9 147.0
RI Neodenticula seminae Diatom 1.778 245.5
FO Proboscia curvirostris Diatom 1.7–2.0 162.5
LO Pyxidicula horridus Diatom 1.9–2.0 204.9
LO Ammodochium rectangulare Ebridian 1.9 233.4
LO Thecosphaera akitaensis Radiolarian 2.4–2.7 414.1
LO Ebriopsis antiqua antiqua Ebridian 2.47–2.48 330.6
LO Distephanus jimlingii Silicoflagellate 2.52 340.5
Gauss top Paleomagnetic 2.581 367.8
FO Neodenticula koizumii Diatom 3.7–3.9 463.0
LO Dictyophimus bullatus/Dictyophimus sp. B Radiolarian 3.8–4.0 597.1

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.

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