Pennsylvanian
Belongs to | Carboniferous |
Type | chronostratigraphy |
Rank | Series |
Scope | global |
Status | formal standard |
Author | J. J. Stevenson |
Year | 1888 |
Etymon | Named after the U.S.A. state of Pennsylvania |
Age top (Ma) | 298.9 |
Age base (Ma) | 323.2 |
Index | C2 |
Date added | 2003-03-23 |
Date changed | 2022-11-04 |
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