Late Triassic Epoch
(Upper Triassic, Keuper)
From 228 +/- 2 To 199.6 +/- 0.6 Ma
Start Defined By: Near first occurrence of the ammonoids Daxatina or
Trachyceras, and of the conodont Metapolygnathus polygnathiformis.
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_
-- Overlaps With --
New Zealand Stage: Kaihikuan (232 - 225)
-- A Substage of --
Eon: Phanerozoic (542 - -5.5012e-005)
Era: Mesozoic (251 - 65.5)
Period: Triassic (251 - 199.6)
-- Preceeded By --
Epoch: Middle Triassic (245 - 228)
ICS Stage: Ladinian (237 - 228)
Regional Stage: Longobardian (231.4 - 228)
-- 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 Stages --
ICS Stage: Carnian (228 - 216.5)
ICS Stage: Norian (216.5 - 203.6)
ICS Stage: Rhaetian (203.6 - 199.6)
Chinese Stage: Bananian (228 - 219)
Chinese Stage: Huobachengian (219 - 209)
Chinese Stage: Erqiaoan (209 - 199.6)
New Zealand Stage: Oretian (225 - 218)
New Zealand Stage: Otamitan (218 - 206)
New Zealand Stage: Otapirian (203 - 199.6)
New Zealand Stage: Warepan (206 - 203)
Regional Stage: Julian (228 - 225)
Regional Stage: Tuvalian (225 - 216.5)
Regional Stage: Lacinian (216.5 - 216)
Regional Stage: Alaunian (216 - 211)
Regional Stage: Sevatian (211 - 203.6)
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