Which rock is not a metamorphic rock?

phyllite

shale

slate

Explanation:

Metamorphic rocks are those which have been changed from one form to another by the high pressure and temperature environment of the Earth. "Metamorphism" means the process of changing form.

Phyllite is a type of foliated metamorphic rock.

Slate is a, fine-grained, clayey metamorphic rock.

Shale is a parent rock to slate and phyllite.

Here is one source for a simple graph. (Copy and paste into browser)

http://hyperphysics.phy-astr.gsu.edu/hbase/Geophys/metamo.html

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