Type
Subzone
Age range
13.1–12.7 Ma

International Timescale

Miocene
Serravallian

Neogene North Pacific Diatom Biochronology Subzones

Denticulopsis praedimorpha
Crucidenticula nicobarica
Denticulopsis simonsenii
13.1013.0813.0613.0413.0213.0012.9812.9612.9412.9212.9012.8812.8612.8412.8212.8012.7812.7612.7412.7212.70

Macrostrat

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