# esker

> long, winding ridge of stratified sand and gravel

**Wikidata**: [Q332784](https://www.wikidata.org/wiki/Q332784)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Esker)  
**Source**: https://4ort.xyz/entity/esker


## References

1. Freebase Data Dumps. 2013
2. YSO-Wikidata mapping project
3. [Environment Ontology](https://raw.githubusercontent.com/INCATools/environments2wikidata/master/matches/curated-high-confidence-envo.tsv)