Metamorphic rocks that exhibit foliation are typically formed by unequal pressure. Foliation occurs when rocks are subjected to differential stress, which causes the minerals within the rock to align along planes in response to that stress. This alignment results in a layered or banded appearance. In contrast, if the pressure is equal in all directions, the rock tends to develop a more massive texture without foliation.
Metamorphic rocks that foliate are created by
unequal pressure
equal pressure
1 answer