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Mineral Composition Of Igneous Rocks

how are igneous rocks classified?,igneous rocks are classified on the basis of their composition and their texture. magma, and the igneous rock it becomes, has a range of chemical compositions..3.4 classification of igneous rock,as has already been described, igneous rocks are classified into four in figure 3.4.1 can be used to help classify igneous rocks by their mineral composition. in most igneous rocks the ferromagnesian silicate minerals are .igneous rocks compositoin and texture,igneous rocks are classified according to their texture and composition. composition refers to both the types of minerals within a rock and the overall chemical .igneous rocks form from molten rock.,molten rock that reaches earth's surface is called lava. an igneous rock is classified on the basis of its mineral composition and the size of its mineral crystals. a .

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