During fractional crystallization of a magma body,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 are those with the highest melting temperatures (mafic minerals). Thus, the rock that is expected to crystallize first will be more mafic than the magma.

During Fractional Crystallization of a Magma Body,the First Rock That