How can igneous rocks become metamorphic rocks?

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Arizona Share
Sep 23, 2015

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With heat and pressure

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When igneous rocks are submitted to high pressure it can actually squeeze the spaces out of the minerals within the rock. This makes the rocks denser. The heat and pressure together cause the rock to flow instead of break or fracture. The mineral grains become realigned. They flatten out and get longer. Thus the "creation" of metamorphic rocks.

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