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Magma is formed from heating of the earth's interior. It exists in two main types - felsic and mafic. Heat sources that contribute to magma generation include the earth's core and radioactive elements. Magma composition depends on whether it forms from the mantle or crust. Igneous rocks form from the solidification of magma or lava. They are classified based on composition, texture and mode of formation. Bowen's reaction series describes the order in which minerals crystallize from cooling magma. Magma differentiation occurs through processes like crystal settling that separate minerals and change the magma's composition.












