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Ordovician

ID: 12

General info

Unit nameOrdoviitsium
Unit nameOrdovician
Belongs toPaleozoic
Overlain bySilurian
OverliesCambrian
Typechronostratigraphy
RankSystem
Scopeglobal
Statusformal standard
AuthorLapworth
Year1879
Etymonordoviitsid, põhja Weilsi keldi hõim
Age top (Ma)443.70
Age base (Ma)488.30
AgePaleozoic
Age referenceGradstein et al., 2004
IndexO
IndexO
CGMW värvikood / color code#009270

Dateeringud / Numeric age

base (Ma)top (Ma)duration (Ma)ReferenceRemarks
485.4443.442Gradstein et al., 2012
488.3443.744.6Gradstein et al., 2004

References

Reference pgs.Remarks
Gradstein et al., 2012593-631
Gradstein et al., 2004