Tremadocian
Belongs to | Lower Ordovician |
Type | chronostratigraphy |
Rank | Stage |
Scope | global |
Status | formal standard |
Author | Sedgwick |
Year | 1847 |
Etymon | Tremadoc, village in Wales |
Age top (Ma) | 477.7 |
Age base (Ma) | 485.4 |
Date added | 2003-04-02 |
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 |
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