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Igneous rocks form when hot, liquid magma from inside the Earth cools and becomes solid.
Intrusive Igneous rocks - When this happens BELOW ground, the rocks are called intrusive.
Extrusive Igneous rocks - When magma comes to the surface as lava and cools ABOVE ground, the rocks are called extrusive.
Desert was positive because it had sandstone which was used for architecture and it was negative because it was always hot and barely any life
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