Geography • Physical GeographyMedium
In the classification of igneous rocks, which term refers to mafic rocks that are low in silica (around 45-52%) and rich in iron and magnesium?
A. Felsic
B. Intermediate
C. Mafic✓ Correct Answer
D. Ultramafic
💡 Solution & Explanation
Mafic igneous rocks are characterized by a low silica content ranging between forty-five and fifty-two percent, along with high concentrations of iron and magnesium minerals like pyroxene and olivine. Felsic rocks, by contrast, contain high silica and quartz levels, while ultramafic rocks possess even lower silica percentages.
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