igneous rocks

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Definition of igneous rocks in English English dictionary
igneous rock: one of the major groups of rock that makes up the crust of the Earth; formed by the cooling of molten rock, either below the surface (intrusive) or on the surface (extrusive)
igneous rock: rock formed by the solidification of molten magma
igneous rock: {i} rock formed when molten magma becomes slightly cold and solidifies
igneous rock: Any of various crystalline or glassy, noncrystalline rocks formed by the cooling and solidification of molten earth material (magma). Igneous rocks comprise one of the three principal classes of rocks, the others being metamorphic and sedimentary rocks. Though they vary widely in composition, most igneous rocks consist of quartz, feldspars, pyroxenes, amphiboles, micas, olivines, nepheline, leucite, and apatite. They may be classified as intrusive or extrusive rocks

igneous rocks

Hyphenation

ig·ne·ous rocks

îgniıs räks

/ˈəgnēəs ˈräks/ /ˈɪɡniːəs ˈrɑːks/

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