adjective
- of, relating to, or containing iron and magnesium, especially in reference to minerals or rocks
Usage: geology; technical
Examples
- Basalt is a dark igneous rock composed primarily of ferromagnesian minerals.
- The ferromagnesian content of the lava determined its viscosity and cooling rate.
- Olivine and pyroxene are common ferromagnesian silicate minerals found in mafic rocks.
- Geologists classify rocks based on their ferromagnesian mineral composition.
- The ferromagnesian minerals in the sample were identified using X-ray diffraction.