Wednesday, February 29, 2012

How Igneous Rocks are Formed

 Igneous rocks can be formed in two different ways. Examples are granite, scoria, and obsidian.


Igneous rocks can form when magma erupts out of a volcano as lava and lands on the ground. When the lava cools down on the ground it hardens to become igneous rocks.



They are formed underground when magma, inside the Earth get trapped in small sockets. As these sockets of magma cool slowly under the ground, it transforms into igneous rocks.

These two different ways can form igneous rocks in Hawaii or anywhere. Another name for igneous rocks is fire rocks.

                          

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