# maar

> low-relief volcanic crater

**Wikidata**: [Q192503](https://www.wikidata.org/wiki/Q192503)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Maar)  
**Source**: https://4ort.xyz/entity/maar


## References

1. Integrated Authority File
2. Freebase Data Dumps. 2013
3. [Environment Ontology](https://raw.githubusercontent.com/INCATools/environments2wikidata/master/matches/curated-high-confidence-envo.tsv)
4. Quora
5. National Library of Israel
6. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)