Asselian ICS Stage
(Krumaian, Uskalikian, Surenian)
From 299 +/- 0.8 To 294.6 +/- 0.8 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, near lowest occurrence of conodont
Streptognathodus postfusus.
Start Based On: Gradstein, Ogg, Smith, _A Geologic Time Scale 2004_
End Based On: Gradstein, Ogg, Smith, _A Geologic Time Scale 2004_
Global Stratotype Section and Point: Aidaralash Creek, Aktöbe, southern Ural
Mountains, northern Kazakhstan
-- A Substage of --
Eon: Phanerozoic (542 - -5.5012e-005)
Era: Paleozoic (542 - 251)
Period: Permian (299 - 251)
Epoch: Early Permian (299 - 270.6)
North American Stage: Wolfcampian (299 - 280)
-- 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 --
ICS Stage: Sakmarian (294.6 - 284.4)
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