The very large crystals of quartz, feldspar, and muscovite found in pegmatites form from______ .
A) the final crystallizing parts of a magma
B) the middle crystallizing parts of a magma
C) the early crystallizing parts of a magma
D) all of the above

Question

Quizplus · Accepted Answer

The very large crystals of quartz, feldspar, and muscovite found in pegmatites form from the final crystallizing parts of a magma. This is because pegmatites are formed during the last stages of magma crystallization, where the remaining melt is rich in water and other volatiles, allowing crystals to grow large.

The Very Large Crystals of Quartz, Feldspar, and Muscovite Found