Ordovician
Belongs to | Paleozoic |
Type | chronostratigraphy |
Rank | System |
Scope | global |
Status | formal standard |
Author | Lapworth |
Year | 1879 |
Etymon | Ordovices, a northen Celtic Welsh tribe |
Age top (Ma) | 443.8 |
Age base (Ma) | 485.4 |
Age (Ma) | Paleozoic |
Index | O |
Alt. index | O |
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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