Triassic Period
From 251 +/- 0.4 To 199.6 +/- 0.6 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: Near lowest occurrence of smooth Psiloceras planorbis
ammonite group.
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)
-- 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 --
Period: Jurassic (199.6 - 145.5)
Epoch: Early Jurassic (199.6 - 175.6)
ICS Stage: Hettangian (199.6 - 196.5)
New Zealand Stage: Aratauran (199.6 - 188)
-- Contains the Following Epochs --
Epoch: Early Triassic (251 - 245)
Epoch: Middle Triassic (245 - 228)
Epoch: Late Triassic (228 - 199.6)
|
