# banded iron formation

> distinctive layered units of iron-rich sedimentary rock that are almost always of Precambrian age

**Wikidata**: [Q304213](https://www.wikidata.org/wiki/Q304213)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Banded_iron_formation)  
**Source**: https://4ort.xyz/entity/banded-iron-formation


## References

1. Freebase Data Dumps. 2013
2. BabelNet
3. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)