Which of the following igneous rocks has a texture consistent with a magma that cooled and solidified slowly at first, followed by more rapid cooling?

A. small mafic crystals enclosed in large felsic ones
B. large, early formed crystals surrounded by smaller, late formed crystals
C. small felsic crystals enclosed in large mafic ones
D. large crystals like those in pegmatite


Answer: B

Environmental & Atmospheric Sciences

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