Igneous Rocks

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Igneous rocks forms when a volcano erupts and the lava from it cools. When the molten rock appears, it hardens and finally forms an igneous rock.Then later, it does it again.

(Amer March 30, 2009 )

Some igneous rocks cool slowly. Those kinds have crystals that you can see. Other times, the igneous rock cools quickly. Those kinds you cannot see the crystals. Some rocks that cool

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