# Hettangian

> first stage and age of the Lower Jurassic series / Early Jurassic epoch

**Wikidata**: [Q633834](https://www.wikidata.org/wiki/Q633834)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Hettangian)  
**Source**: https://4ort.xyz/entity/hettangian


## References

1. International Chronostratigraphic Chart 2013/01
2. [Source](https://stratigraphy.org/gssps/)
3. Freebase Data Dumps. 2013
4. [The Global Stratotype Sections and Point (GSSP) for the base of the Jurassic System at Kuhjoch (Karwendel Mountains, Northern Calcareous Alps, Tyrol, Austria)](https://doi.org/10.18814/epiiugs/2013/v36i3/001)