adjective
- relating to or denoting igneous rocks rich in magnesium and iron
Usage: geology
Examples
- Basalt is a common mafic volcanic rock.
- The mafic minerals in this rock give it a dark color.
- Mafic rocks are typically denser than felsic rocks.
- The ocean floor is composed primarily of mafic igneous rocks.
- Geologists identified mafic intrusions in the mountain range.
- The mafic composition indicates high iron and magnesium content.