A primary difference between phyllite and schist is ____________.

A)schist contains mica,whereas phyllite contains only clay
B)phyllite contains mica,whereas schist contains only clay
C)mica crystals within schist are larger than those within phyllite
D)mica crystals within phyllite are larger than those within schist

Question

A primary difference between phyllite and schist is ____________.

A)schist contains mica,whereas phyllite contains only clay 
B)phyllite contains mica,whereas schist contains only clay 
C)mica crystals within schist are larger than those within phyllite 
D)mica crystals within phyllite are larger than those within schist

Quizplus · Accepted Answer

The primary difference between phyllite and schist is that mica crystals within schist are usually larger than those within phyllite. This difference in crystal size is due to the different amounts of pressure and heat the rocks have undergone during their formation. Schist has undergone greater amounts of pressure and heat, resulting in larger mica crystals.

A Primary Difference Between Phyllite and Schist Is ____________