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Actinocyclus oculatus
1663
Type
Zone
Age range
2–1.1
Ma
International Timescale
Pleistocene
Calabrian
Gelasian
Neogene North Pacific Diatom Biochronology
Proboscia curvirostris
Actinocyclus oculatus
Neodenticula koizumii
Neogene North Pacific Diatom Biochronology Subzones
Proboscia curvirostris
Actinocyclus oculatus
Neodenticula koizumii
2.0
1.9
1.9
1.9
1.8
1.8
1.7
1.6
1.6
1.6
1.5
1.4
1.4
1.4
1.3
1.3
1.2
1.1
1.1
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