Why are rocks rich in feldspar and silica called felsic?
A) Felsic is the Latin word that means rich in feldspar and silica.
B) Felsic is the opposite of mafic.
C) Felsic comes from feldspar and silica.
D) Felsic is the opposite of ultramafic.
Question 2
Why are rocks rich in magnesium and iron called mafic?
A) Mafic is the opposite of felsic.
B) Ferric is the same as mafic, which means rich in magnesium and iron.
C) Mafic comes from magnesium and ferric.
D) Mafic is the Latin word that means rich is magnesium and iron.
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Potassium feldspar
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