# Tertiary

> obsolete term for the geological period 66–2.58 million years ago

**Wikidata**: [Q188645](https://www.wikidata.org/wiki/Q188645)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Tertiary_period)  
**Source**: https://4ort.xyz/entity/tertiary


## References

1. Integrated Authority File
2. Freebase Data Dumps. 2013
3. Quora
4. [Source](https://encyklopedia.pwn.pl/haslo/trzeciorzed;3989653.html)
5. National Library of Israel
6. KBpedia
7. [Bibliography of the History of the Czech Lands](https://biblio.hiu.cas.cz/records/7bb71f61-ed95-4ca9-8956-7dad2338f52c)