igneous rock definition and please follow
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Igneous rock, or magmatic rock, is one of the three main rock types, the others being sedimentary and metamorphic. Igneous rock is formed through the cooling and solidification of magma or lava. The magma can be derived from partial melts of existing rocks in either a planet's mantle or crust.
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Answer : Igneous rocks form when magma ( molten rock ) cools and crystallizes, either at volcanoes on the surface of the earth or while the melted rock inside the crust. when lava comes out of a volcano and solidifies into extrusive igneous rock. also called volcanic, the rock cools very quickly.
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