mafic
Describing rocks, such as silicate minerals, magmas, and volcanic and intrusive igneous rocks, which contain relatively high concentrations of magnesium and iron.
Related words
- nonmafic
- ultramafic
Where this comes from
This definition is adapted from “mafic” on Wiktionary, by its contributors, published under CC BY-SA 4.0. This page is published under the same licence.