Igneous rocks is formed when a body of gneiss is subjected to heat and forms a melt and the melt cools and crystallize.
What is Igneous rocks?
Igneous rocks is a type of rock that is formed form when hot, molten rock crystallizes and later solidify in the surface of the earth.
The melt is usually found in the deep within the Earth and it will cone up to the surface as a molten magma.
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