Question

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

a. extrusive

c. non-foliated
b. foliated

d. detrital

Answer 1

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.

Answer 2

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