Anisian ICS Stage
(Guanlingian)
From 245 +/- 1.5 To 237 +/- 2 Ma
Start Defined By: Ammonite, near lowest occurrences of genera Japonites,
Paradanubites, and Paracrochordiceras; and of the conodont Chiosella
timorensis.
End Defined By: Alternate levels are near base of Reitzi, Secedensis, or
Curionii ammonite zone; near first occurrence of the conodont genus
Budurovignathus.
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)
New Zealand Stage: Etalian (243 - 232)
-- A Substage of --
Eon: Phanerozoic (542 - -5.5012e-005)
Era: Mesozoic (251 - 65.5)
Period: Triassic (251 - 199.6)
Epoch: Middle Triassic (245 - 228)
-- Preceeded By --
Epoch: Early Triassic (251 - 245)
ICS Stage: Olenekian (249.7 - 245)
Regional Stage: Spathian (247.4 - 245)
-- Followed By --
ICS Stage: Ladinian (237 - 228)
Regional Stage: Fassanian (237 - 231.4)
-- Contains the Following Stages --
Regional Stage: Aegean (245 - 243)
Regional Stage: Bithynian (243 - 241)
Regional Stage: Pelsonian (241 - 239)
Regional Stage: Illyrian (239 - 237)
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