# Toarcian turnover

> mass extinction event that marked the end of the Pliensbachian stage and the start of the Toarcian stage of the Early Jurassic period, c. 183 Ma

**Wikidata**: [Q378170](https://www.wikidata.org/wiki/Q378170)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Toarcian_turnover)  
**Source**: https://4ort.xyz/entity/toarcian-turnover


## References

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