# Early Pennsylvanian

> first epoch of the Pensylvanian Subperiod; fourth epoch of the Carboniferous Period

**Wikidata**: [Q131599313](https://www.wikidata.org/wiki/Q131599313)  
**Source**: https://4ort.xyz/entity/early-pennsylvanian


## References

1. International Chronostratigraphic Chart 2023/09
2. CGMW ICS colour codes