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Aim: How are igneous rocks formed? Do Now: Take out new section of notes and label it rocks. Igneous Rocks Rocks that form when natural, molten (liquid) rock-forming material cools into a solid Liquid rock BENEATH Earth’s surface is called magma When magma comes out onto or above Earth’s surface it becomes LAVA When magma solidifies beneath Earth’s solid surface the rocks are called INTRUSIVE When lava solidifies on or above Earth’s solid surface the resulting rock is EXTRUSIVE Formation • All igneous rocks are a result of the solidification of magma or lava. • Solidification can also be known as CRYSTALLIZATION Crystal Size Texture • Glassy, Fine, Coarse, Very Coarse • Non-vesicular vs Vesicular Mineral Composition
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