# Callovian

> fourth and last stage and age of the Middle Jurassic series and epoch

**Wikidata**: [Q764255](https://www.wikidata.org/wiki/Q764255)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Callovian)  
**Source**: https://4ort.xyz/entity/callovian


## References

1. International Chronostratigraphic Chart 2013/01
2. Freebase Data Dumps. 2013