What Is The Classification Of Igneous Rocks Based On

When the molten magma cools deep inside the earth s crust intrusive igneous rocks are formed.

Classification of igneous rocks based on mineral composition and texture textures reflect rate of cooling phaneritic phaneritic mineral crystals are visible e g. Texture describes the physical characteristics of the minerals such as grain size. View some examples of igneous rocks from the australian museum s mineralogy collection. Felsic intermediate mafic and ultramafic based on either their chemistry or their mineral composition.

This relates to the cooling history of the molten magma from which it came. The rocks formed by the solidification on the cooling of molten magma are called igneous rocks. Felsic intermediate mafic and ultramafic. As has already been described igneous rocks are classified into four categories.

Composition refers to the rock s specific mineralogy and chemical composition. Igneous rocks are classified into four categories. Granite gabbro pegmatite pegmatite exceptionally large crystals e g. The diagram in figure 3 16 can be used to help classify igneous rocks by their mineral composition.

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Depending on where the molten magma cools they are of the following types. All rocks can be classified as either igneous sedimentary or metamorphic depending on how they were formed. As has already been described igneous rocks are classified into four categories based on either their chemistry or their mineral composition. They are classified by using grain size silica content and or silica saturation.

The diagram in figure 4 3 1 can be used to help classify igneous rocks by their mineral composition. Felsic intermediate mafic and ultramafic based on either their chemistry or their mineral composition. The diagram in figure 3 4 1 can be used to help classify igneous rocks by their mineral composition. Igneous rocks are classified based on texture and composition.

What is the classification of igneous rocks based on. Igneous rocks are those that cooled directly from lava or magma. Igneous rocks are formed when magma cools and solidifies. When will magma rise to earth s surface.

Pyroxene and calcium rich plagioclase feldspar.