Ordovician
General info
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 |
Stratotypes
Locality | Type | From (m)1 | To (m)2 | Reference | Remarks |
---|---|---|---|---|---|
Green Point Section, western Newfoundland |
boundary stratotype
| 101.8 | Cooper et al., 2001 | GSSP for the Tremadocian Stage |
Reference | Content | Year1 | Pages | Remarks |
---|---|---|---|---|
Gradstein et al., 2004 |
2004
| |||
Gradstein et al., 2012 |
2012
| 593-631 | ||
Cooper et al., 2001 | Tremadocian GSSP proposal |
2001
| ||
Goldman et al., 2020 |
2020
| 631-694 |
Browse Geocollections