# Ypresian

> first stage and age of the Eocene series and epoch

**Wikidata**: [Q508691](https://www.wikidata.org/wiki/Q508691)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Ypresian)  
**Source**: https://4ort.xyz/entity/ypresian


## References

1. International Chronostratigraphic Chart 2013/01
2. [Source](https://stratigraphy.org/gssps/)
3. Freebase Data Dumps. 2013
4. Encyclopædia Britannica Online