Neogene North Pacific Diatom Biochronology Subzones
24 - 0 Ma
Geologic Time
Phanerozoic
Cenozoic
Quaternary
Holocene
Pleistocene
Late Pleistocene
Middle Pleistocene
Calabrian
Gelasian
Neogene
Pliocene
Piacenzian
Zanclean
Miocene
Messinian
Tortonian
Serravallian
Langhian
Burdigalian
Aquitanian
Paleogene
Oligocene
Chattian
Zone
Neodenticula seminae
Proboscia curvirostris
Actinocyclus oculatus
Neodenticula koizumii
Neodenticula koizumii - Neodenticula kamtschatica
Thalassiosira praefraga
Subzone
Thalassiosira oestrupii
N. kamtschatica - Nitz. rolandii
Rouxia californica
Thalassionema schraderi
Denticulopsis katayamae
Denticulopsis dimorpha
Thalassiosira yabei
Denticulopsis praedimorpha
Crucidenticula nicobarica
Denticulopsis simonsenii
D. hyalina - D. praehyalina
Denticulopsis lauta
Denticulopsis praelauta
Crucidenticula kanayae
Crucidenticula sawamurae
Thalassiosira fraga
