Ultramafic rock
= Ultramafic rock
A <rock> dominated by magnesium- and iron-rich <minerals>, with lower silica content than typical <mafic rocks>. Alteration can strongly change its magnetic properties.
= Ultramafic rock
A <rock> dominated by magnesium- and iron-rich <minerals>, with lower silica content than typical <mafic rocks>. Alteration can strongly change its magnetic properties.