# Geological Observations on the Volcanic Islands

> book by Charles Darwin

**Wikidata**: [Q5535307](https://www.wikidata.org/wiki/Q5535307)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Geological_Observations_on_the_Volcanic_Islands)  
**Source**: https://4ort.xyz/entity/geological-observations-on-the-volcanic-islands