Jurassic Period
From 199.6 +/- 0.6 To 145.5 +/- 4 Ma
Start Defined By: Near lowest occurrence of smooth Psiloceras planorbis
ammonite group.
End Defined By: Maybe near lowest occurrence of ammonite Berriasella jacobi.
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)
-- Preceeded By --
Period: Triassic (251 - 199.6)
Epoch: Late Triassic (228 - 199.6)
ICS Stage: Rhaetian (203.6 - 199.6)
Chinese Stage: Erqiaoan (209 - 199.6)
New Zealand Stage: Otapirian (203 - 199.6)
-- Followed By --
Period: Cretaceous (145.5 - 65.5)
Epoch: Early Cretaceous (145.5 - 99.6)
ICS Stage: Berriasian (145.5 - 140.2)
European Epoch: Neocomian (145.5 - 130)
Japanese Stage: Kochian (145.5 - 136.4)
New Zealand Stage: Mokoiwian (145.5 - 119)
North American Stage: Coahulian (145.5 - 127)
-- Contains the Following Epochs --
Epoch: Early Jurassic (199.6 - 175.6)
Epoch: Middle Jurassic (175.6 - 161.2)
Epoch: Late Jurassic (161.2 - 145.5)
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