Kochian Japanese Stage
From 145.5 +/- 4 To 136.4 +/- 2 Ma
Start Defined By: Maybe near lowest occurrence of ammonite Berriasella
jacobi.
End Defined By: Ammonite, lowest occurrence of genus Acanthodiscus
(especially A. radiatus).
Start Based On: Gradstein, Ogg, Smith, _A Geologic Time Scale 2004_
End Based On: Gradstein, Ogg, Smith, _A Geologic Time Scale 2004_
-- Overlaps With --
Regional Stage: Volgian (150.8 - 142)
Regional Stage: Portlandian (146 - 142)
-- A Substage of --
Eon: Phanerozoic (542 - -5.5012e-005)
Era: Mesozoic (251 - 65.5)
Period: Cretaceous (145.5 - 65.5)
Epoch: Early Cretaceous (145.5 - 99.6)
European Epoch: Neocomian (145.5 - 130)
New Zealand Stage: Mokoiwian (145.5 - 119)
North American Stage: Coahulian (145.5 - 127)
-- Preceeded By --
Period: Jurassic (199.6 - 145.5)
Epoch: Late Jurassic (161.2 - 145.5)
ICS Stage: Tithonian (150.8 - 145.5)
Chinese Stage: Penglaizhenian (149 - 145.5)
New Zealand Stage: Puaroan (150 - 145.5)
-- Followed By --
ICS Stage: Hauterivian (136.4 - 130)
Japanese Stage: Aritan (136.4 - 125)
-- Contains the Following Stages --
ICS Stage: Berriasian (145.5 - 140.2)
ICS Stage: Valanginian (140.2 - 136.4)
Regional Stage: Ryzanian (142 - 136.5)
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