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Proboscia curvirostris
1662
Type
Zone
Age range
1.1–0.31
Ma
International Timescale
Pleistocene
Chibanian
Calabrian
Neogene North Pacific Diatom Biochronology
Neodenticula seminae
Proboscia curvirostris
Actinocyclus oculatus
Neogene North Pacific Diatom Biochronology Subzones
Neodenticula seminae
Proboscia curvirostris
Actinocyclus oculatus
1.1
1.1
1.0
0.9
0.9
0.8
0.8
0.8
0.7
0.7
0.6
0.6
0.5
0.5
0.4
0.3
0.3
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