# tufa

> porous limestone rock

**Wikidata**: [Q193685](https://www.wikidata.org/wiki/Q193685)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Tufa)  
**Source**: https://4ort.xyz/entity/tufa


## References

1. GF WordNet
2. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)