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What determines whether a metamorphic rock is foliated or non-foliated?

User Icemanind
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Answer: Foliated rocks have layers you can see, non foliated rocks don't have layers.

Step-by-step explanation:

User Panchicore
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Answer:

Foliated metamorphic rocks such as gneiss, phyllite, schist, and slate have a layered or banded appearance that is produced by exposure to heat and directed pressure. Non-foliated metamorphic rocks such as hornfels, marble, quartzite, and novaculite do not have a layered or banded appearance.

Step-by-step explanation:

User MisterAlvis
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