# Roadian

> first stage and age of the Guadalupian series and epoch

**Wikidata**: [Q1051453](https://www.wikidata.org/wiki/Q1051453)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Roadian)  
**Source**: https://4ort.xyz/entity/roadian


## References

1. International Chronostratigraphic Chart 2013/01
2. [Source](https://stratigraphy.org/gssps/#permian)
3. Freebase Data Dumps. 2013
4. [Source](https://stratigraphy.org/gssps/roadian)
5. [Source](http://stratigraphy.org/subcommission-permian/files/permophiles/20121027151852022.pdf)