# stratigraphic unit

> volume of rock defined by its petrographic, lithologic or paleontologic features

**Wikidata**: [Q3694119](https://www.wikidata.org/wiki/Q3694119)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Stratigraphic_unit)  
**Source**: https://4ort.xyz/entity/stratigraphic-unit


## References

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