Due to fractional crystallization and assimilation of surrounding host rock,most magmas that rise slowly through the crust chemically evolve to become ____________.
A)more felsic
B)more mafic
C)dominated by nonsilicate minerals

Question

Quizplus · Accepted Answer

Fractional crystallization involves the removal of mafic minerals from the magma, making it more silica-rich or felsic. Assimilation of surrounding host rocks can introduce additional silica and other felsic minerals into the magma. As a result, slow-rising magmas typically evolve to become more felsic.

Due to Fractional Crystallization and Assimilation of Surrounding Host Rock,most