Darriwilian ICS Stage
From 468.1 +/- 1.6 To 460.9 +/- 1.6 Ma
Start Defined By: Graptolite, lowest occurrence of Undulograptus
austrodentatus.
End Defined By: Graptolite, lowest occurrence of Nemagraptus gracilis.
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: Ningkuo Formation, Huangnitang,
Changshan, Zhejiang province, southeast China
-- Overlaps With --
General Stage: Llanvirn (471.8 - 464)
North American Stage: White Rockian (471.8 - 462)
North American Stage: Mohawkian (462 - 451)
-- A Substage of --
Eon: Phanerozoic (542 - -5.5012e-005)
Era: Paleozoic (542 - 251)
Period: Ordovician (488.3 - 443.7)
Epoch: Middle Ordovician (471.8 - 460.9)
-- Preceeded By --
ICS Stage: Ordovician III (471.8 - 468.1)
Australian Stage: Ypeenian (470 - 468.1)
-- Followed By --
Epoch: Late Ordovician (460.9 - 443.7)
ICS Stage: Ordovician V (460.9 - 455.8)
Australian Stage: Gisbornian (460.9 - 456)
Chinese Stage: Baotan (460.9 - 454.5)
European Stage: Aurelucian (460.9 - 457)
General Stage: Caradoc (460.9 - 449)
Regional Stage: Costonian (460.9 - 459)
-- Contains the Following Stages --
General Stage: Llandeilo (464 - 460.9)
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