A strongly foliated, coarsely crystalline metamorphicrock, produced during regional metamorphism, that can readily be splitinto slabs or flakes because more than 50% of its mineral grains areparallel to each other.
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A strongly foliated, coarsely crystalline metamorphicrock, produced during regional metamorphism, that can readily be splitinto slabs or flakes because more than 50% of its mineral grains areparallel to each other.