If a body of magma is subjected to fractional crystallization,the first rock that is expected to crystallize from the magma will be ________.
A)identical in chemical composition to the magma
B)more mafic than the magma
C)more felsic than the magma
D)The composition of the rock is not predictable.

Question

Quizplus · Accepted Answer

During fractional crystallization, the first minerals to crystallize from a magma are those with the highest melting temperatures, which are typically the more mafic minerals. This process causes the remaining magma to become more felsic in composition. Therefore, the first rock that is expected to crystallize will be more mafic than the magma.

If a Body of Magma Is Subjected to Fractional Crystallization,the