Pennsylvanian
General info
| 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 |
| Reference | Content | Year1 | Pages | Remarks |
|---|---|---|---|---|
| Gradstein et al., 2004 |
2004
| |||
| Gradstein et al., 2012 |
2012
| 761 | ||
| Aretz et al., 2020 |
2020
| 811-874 |
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