# Eocene–Oligocene extinction event

> mass extinction

**Wikidata**: [Q1542955](https://www.wikidata.org/wiki/Q1542955)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Eocene–Oligocene_extinction_event)  
**Source**: https://4ort.xyz/entity/eocene-oligocene-extinction-event


## References

1. [Source](http://stratigraphy.org/ICSchart/ChronostratChart2018-08.pdf)
2. Freebase Data Dumps. 2013