Silurian Period
From 443.7 +/- 1.5 To 416 +/- 2.8 Ma
Start Defined By: Graptolites, lowest occurrences of Parakidograptus
acuminatus and Akidograptus ascensus.
End Defined By: Graptolite, lowest occurrence of Monograptus uniformis.
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: Ordovician (488.3 - 443.7)
Epoch: Late Ordovician (460.9 - 443.7)
ICS Stage: Hirnantian (445.6 - 443.7)
Australian Stage: Bolindian (450 - 443.7)
General Stage: Ashgill (449 - 443.7)
North American Stage: Cincinnatian (451 - 443.7)
-- Followed By --
Period: Devonian (416 - 359.2)
Epoch: Early Devonian (416 - 397.5)
ICS Stage: Lochkovian (416 - 411.2)
Chinese Stage: Lianhuashanian (416 - 413)
North American Stage: Ulsterian (416 - 391.8)
-- Contains the Following Epochs --
Epoch: Early Silurian (443.7 - 422.9)
Epoch: Late Silurian (422.9 - 416)
|
