Lower Ordovician
Belongs to | Ordovician |
Type | chronostratigraphy |
Rank | Series |
Scope | global |
Status | formal standard |
Age top (Ma) | 470 |
Age base (Ma) | 485.4 |
Index | O1 |
Alt. index | O1 |
Date added | 2003-03-23 |
Date changed | 2022-11-04 |
Locality | Type | From (m) | To (m) | Reference | Remarks | |
---|---|---|---|---|---|---|
Green Point Section, western Newfoundland | boundary stratotype | 101.8 | Cooper et al., 2001 | GSSP for the Tremadocian Stage |
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