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Igneous Rocks Granite | Basalt | Pumice |Obsidian . There are 2 kinds of IGNEOUS Rocks: EXTRUSIVE and INTRUSIVE.Igneous rocks are formed from molten magma (INTRUSIVE) or lava (EXTRUSIVE). The word, igneous means "fire". All igneous rock starts deep in the earth as hot, molten magma. If the magm
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