Classification diagram for #igneous rocks. Igneous #rocks are | Geology of the world and the Environment

Classification diagram for #igneous rocks. Igneous #rocks are classified according to the relative abundances of different #minerals. A given rock is represented by a vertical line in the diagram. In the #ultramafic field, the arrows represent a rock containing 40% #olivine and 60% #pyroxene . The name an igneous rock gets depends not only on composition, but on whether it is #intrusive or #extrusive. [KP]

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