# Cenomanian-Turonian boundary event

> anoxic extinction events in the Cretaceous period, occurring at 91.5 ± 8.6 Ma

**Wikidata**: [Q5058878](https://www.wikidata.org/wiki/Q5058878)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Cenomanian-Turonian_boundary_event)  
**Source**: https://4ort.xyz/entity/cenomanian-turonian-boundary-event


## References

1. [Source](http://stratigraphy.org/ICSchart/ChronostratChart2018-08.jpg)