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____________ metamorphic rocks have mineral grains that line up in parallel layers.

a. extrusive

c. non-foliated
b. foliated

d. detrital

User JustinP
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Foliated metamorphic rocks have mineral grains that line up in parallel layers. Correct answer: B The foliation of the rocks is caused by the re-alignment of minerals when they experience high pressure and temperature. The layers can have different thickness, they can be very thin but also thick. Non-foliated metamorphic rocks on the other hand do not have a layered or banded appearance.

User Rhombidodecahedron
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Foliated metamorphic rocks have mineral grains that line up in parallel layers. The correct answer is foliated. 
User Iowa
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