Cambrian Period
From 542 +/- 0.3 To 488.3 +/- 1.7 Ma
Start Defined By: Trace fossil, lowest occurrence of Treptichnus (Phycodes)
pedum. Near base of negative carbon-isotope excursion.
End Defined By: Conodont, lowest occurrence of Iapetognathus fluctivagus;
just above base of Cordylodus lindstromi conodont Zone. Just below lowest
occurrence of planktonic graptolites.
Start Based On: Amthor et. al., "Extinction of Cloudinia and Namacalathus at
the Precambrian-Cambrian boundary in Oman", _Geology_, v. 31, p. 431-434,
2003.
End Based On: Gradstein, Ogg, Smith, _A Geologic Time Scale 2004_
-- Overlaps With --
North American Stage: Ibexian (491 - 471.8)
-- A Substage of --
Eon: Phanerozoic (542 - -5.5012e-005)
Era: Paleozoic (542 - 251)
-- Preceeded By --
Time: Precambrian (4567.17 - 542)
Eon: Proterozoic (2500 - 542)
Era: Neoproterozoic (1000 - 542)
Period: Ediacaran (630 - 542)
Australian Stage: Adelaidean (1300 - 542)
Chinese Stage: Sinian (800 - 542)
General Stage: Vendian (650 - 542)
General Stage: Poundian (570 - 542)
North American Stage: Hadrynian (850 - 542)
South African Stage: Namibian (900 - 542)
-- Followed By --
Period: Ordovician (488.3 - 443.7)
Epoch: Early Ordovician (488.3 - 471.8)
ICS Stage: Tremadocian (488.3 - 478.6)
Australian Stage: Datsonian (488.3 - 485)
European Stage: Cressagian (488.3 - 486)
-- Contains the Following Epochs --
Epoch: Early Cambrian (542 - 513)
Epoch: Middle Cambrian (513 - 501)
Epoch: Late Cambrian (501 - 488.3)
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