WebIgneous rock (igneous from Latin igneus 'fiery'), or magmatic rock, is one of the three main rock types, the others being sedimentary and metamorphic. Igneous rocks are formed through the cooling …
WebOct 19, 2023 · Igneous rocks form when magma (molten rock) cools and crystallizes, either at volcanoes on the surface of the Earth or while the melted rock is still inside the crust. All magma …
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Igneous rock | Characteristics, Examples, Formation, & Types
WebMar 7, 2024 · Igneous rock, any of various crystalline or glassy rocks formed by the cooling and solidification of magma, which is a hot (600 to 1,300 °C, or 1,100 to 2,400 °F) molten or partially molten …
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What are igneous rocks? | U.S. Geological Survey - USGS.gov
WebIgneous rocks (from the Latin word for fire) form when hot, molten rock crystallizes and solidifies. The melt originates deep within the Earth near active plate boundaries or hot spots, …
WebJan 31, 2024 · This classification categorizes igneous rocks into four primary groups: felsic, intermediate, mafic, and ultramafic. Each group has distinct characteristics and typical …
