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  1. Igneous rock - Wikipedia

    Igneous 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 and …

  2. Igneous Rocks - Types, Properties, and Examples

    Jan 31, 2024 · Learn about igneous rocks in geology, including their origin, properties, and classification. Get examples and identification tips.

  3. What are igneous rocks? | U.S. Geological Survey - USGS.gov

    What are igneous rocks? Igneous 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 …

  4. Igneous rock | Characteristics, Examples, Formation, & Types - Britannica

    Oct 31, 2025 · Igneous rocks constitute one of the three principal classes of rocks, the others being metamorphic and sedimentary. Igneous rocks are formed from the solidification of magma, which is a …

  5. IGNEOUS Definition & Meaning - Merriam-Webster

    The meaning of IGNEOUS is formed by solidification of magma. How to use igneous in a sentence.

  6. Igneous Rocks - Geology (U.S. National Park Service)

    Nov 8, 2023 · Igneous rocks are “fire-born,” meaning that they are formed from the cooling and solidification of molten (melted) rock. The word igneous derives from ignis, the Latin word for “fire.”

  7. Igneous Rocks - Education

    Oct 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.

  8. Igneous Rocks | Pictures of Intrusive and Extrusive Rock Types

    Photographs and descriptions of intrusive and extrusive igneous rocks with photos and links to detailed articles by Geology.com

  9. How Are Igneous Rocks Formed? - WorldAtlas

    Jun 5, 2025 · Rocks can be categorized into one of three types: sedimentary, metamorphic and igneous. Igneous rock is formed when magma, which is liquid molten rock, cools or sets, solidifying into rock …

  10. IGNEOUS | definition in the Cambridge English Dictionary

    Add to word list earth science describes rocks made from magma (= liquid rock) that has cooled and become solid (Definition of igneous from the Cambridge Academic Content Dictionary © Cambridge …