# Sandbian

> first stage and age of the Upper Ordovician Series / Late Ordovician Epoch

**Wikidata**: [Q1807140](https://www.wikidata.org/wiki/Q1807140)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Sandbian)  
**Source**: https://4ort.xyz/entity/sandbian


## References

1. International Chronostratigraphic Chart 2013/01
2. [Source](https://stratigraphy.org/chart)
3. [Source](https://stratigraphy.org/gssps/sandbian)
4. Freebase Data Dumps. 2013