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Igneous rocks form from superheated magma

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Igneous rocks are just cooled-down lava, meaning they all started as terrifyingly hot, molten liquid. When magma escapes the crust, it cools quickly into smooth rocks like obsidian. When it gets trapped underground, it cools slowly into chunky granite. Basically, it is the planet's violent version of making homemade hard candy.

Igneous rocks form from superheated magma
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