Refers to rocks or minerals that have solidified from molten material, especially lava or magma. Igneous rocks form when molten rock (magma) cools and solidifies, either at the Earth’s surface as lava or beneath the surface as magma.
Igneous is typically used in geological contexts to classify rocks by their formation process. These rocks are one of the three main types of rocks, along with sedimentary and metamorphic.
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