Final answer:
Foliation is a characteristic feature of metamorphic rocks, creating a layered or banded appearance due to the alignment of platy minerals like mica under differential stress.
Explanation:
Foliation is a key characteristic feature of metamorphic rocks, specifically foliated metamorphic rocks. This texture results in a layered or banded appearance due to the alignment of platy minerals like mica or compositional layering, reflecting the rock's history of differential stress.
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