# complex

> unit of rocks composed of rocks of two or three of the following rock types: metamorphic, igneous or sedimentary; lithodemic units usually of regional extent

**Wikidata**: [Q28231530](https://www.wikidata.org/wiki/Q28231530)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Complex_(geology))  
**Source**: https://4ort.xyz/entity/complex-q28231530