Tonian
General info
Belongs to |
Neoproterozoic
|
Type | chronostratigraphy |
Rank | System |
Scope | global |
Status | formal standard |
Age top (Ma) | 720 |
Age base (Ma) | 1000 |
Index | NP1 |
Date added | 2003-04-03 |
Date changed | 2022-11-04 |
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