Permian Period
From 299 +/- 0.8 To 251 +/- 0.4 Ma
Start Defined By: Conodont, lowest occurrence of Streptognathodus isolatus
within the S. "wabaunsensis" conodont chronocline. 6 m higher is lowest
fusilinid foraminifer Sphaeroschwagerina.
End Defined By: Conodont, lowest occurrence of Hindeodus parvus; termination
of major negative carbon-isotope excursion. About 1 myr after peak of
Late Permian extinctions.
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: Paleozoic (542 - 251)
-- Preceeded By --
Period: Carboniferous (359.2 - 299)
Epoch: Pennsylvanian (318.1 - 299)
Sub-Epoch: Late Pennsylvanian (306.5 - 299)
ICS Stage: Gzhelian (303.9 - 299)
Chinese Stage: Mapingian (310 - 299)
European Epoch: Silesian (326.4 - 299)
European Stage: Stephanian (306.5 - 299)
North American Stage: Virgilian (305 - 299)
Russian Stage: Noginskian (300.5 - 299)
-- Followed By --
Era: Mesozoic (251 - 65.5)
Period: Triassic (251 - 199.6)
Epoch: Early Triassic (251 - 245)
ICS Stage: Induan (251 - 249.7)
Regional Stage: Griesbachian (251 - 250.4)
-- Contains the Following Epochs --
Epoch: Early Permian (299 - 270.6)
Epoch: Middle Permian (270.6 - 260.4)
Epoch: Late Permian (260.4 - 251)
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