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Denticulopsis dimorpha
1677
Type
Subzone
Age range
9.7–9.3
Ma
International Timescale
Miocene
Tortonian
Neogene North Pacific Diatom Biochronology Subzones
Denticulopsis katayamae
Denticulopsis dimorpha
Thalassiosira yabei
9.70
9.68
9.66
9.64
9.62
9.60
9.58
9.56
9.54
9.52
9.50
9.48
9.46
9.44
9.42
9.40
9.38
9.36
9.34
9.32
9.30
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