Toarcian ICS Stage
From 183 +/- 1.5 To 175.6 +/- 2 Ma
Start Defined By: Ammonite, near lowest occurrence of a diversified
Eodactylites ammonite fauna; correlates with the NW European Paltus
horizon.
End Defined By: Ammonite, lowest occurrence of Leioceras genus.
Start Based On: Gradstein, Ogg, Smith, _A Geologic Time Scale 2004_
End Based On: Gradstein, Ogg, Smith, _A Geologic Time Scale 2004_
-- A Substage of --
Eon: Phanerozoic (542 - -5.5012e-005)
Era: Mesozoic (251 - 65.5)
Period: Jurassic (199.6 - 145.5)
Epoch: Early Jurassic (199.6 - 175.6)
New Zealand Stage: Uruoan (188 - 169)
-- Preceeded By --
ICS Stage: Pliensbachian (189.6 - 183)
-- Followed By --
Epoch: Middle Jurassic (175.6 - 161.2)
ICS Stage: Aalenian (175.6 - 171.6)
Chinese Stage: Xintiangouan (175.6 - 167)
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