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Stratigraphy
Lower Ordovician
Belongs toOrdovician
Typechronostratigraphy
RankSeries
Scopeglobal
Statusformal standard
Age top (Ma)470
Age base (Ma)485.4
Index
O1
Alt. index
O1
Date added2003-03-23
Date changed2022-11-04
Locality
Type
From (m)
To (m)
Reference
Remarks
Green Point Section, western Newfoundland
boundary stratotype
101.8Cooper et al., 2001GSSP for the Tremadocian Stage
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