According to the Foliated Metamorphic Rock Chart slate, phyllite, schist, and gneiss can all have the same parent rock (shale). If this is true, what determines the difference between a slate and a gneiss rock that both are formed from shale? What role does the parent rock play in determining the type of metamorphic rock that will be formed? In a rock that has undergone contact metamorphism, would you expect to find foliation? Why or why not? State your answers in 3-5 sentences.

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