Early Triassic Epoch
(Lower Triassic, Buntsandstein, Scythian)
From 251 +/- 0.4 To 245 +/- 1.5 Ma
Start Defined By: Conodont, lowest occurrence of Hindeodus parvus;
termination of major negative carbon-isotope excursion. About 1 myr after
peak of Late Permian extinctions.
End Defined By: Ammonite, near lowest occurrences of genera Japonites,
Paradanubites, and Paracrochordiceras; and of the conodont Chiosella
timorensis.
Start Based On: Gradstein, Ogg, Smith, _A Geologic Time Scale 2004_
End Based On: Gradstein, Ogg, Smith, _A Geologic Time Scale 2004_
-- Overlaps With --
New Zealand Stage: Malakovian (248 - 243)
-- A Substage of --
Eon: Phanerozoic (542 - -5.5012e-005)
Era: Mesozoic (251 - 65.5)
Period: Triassic (251 - 199.6)
-- Preceeded By --
Era: Paleozoic (542 - 251)
Period: Permian (299 - 251)
Epoch: Late Permian (260.4 - 251)
ICS Stage: Changhsingian (253.8 - 251)
New Zealand Stage: Makabewan (253.8 - 251)
North American Stage: Ochoan (260.4 - 251)
Regional Stage: Thuringian (270.6 - 251)
-- Followed By --
Epoch: Middle Triassic (245 - 228)
ICS Stage: Anisian (245 - 237)
Regional Stage: Aegean (245 - 243)
-- Contains the Following Stages --
ICS Stage: Induan (251 - 249.7)
ICS Stage: Olenekian (249.7 - 245)
Regional Stage: Dienerian (250.4 - 249.7)
Regional Stage: Griesbachian (251 - 250.4)
Regional Stage: Smithian (249.7 - 247.4)
Regional Stage: Spathian (247.4 - 245)
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