What Is The Classification Of Igneous Rocks Based On

View some examples of igneous rocks from the australian museum s mineralogy collection.

Composition refers to the rock s specific mineralogy and chemical composition. Basalt is an igneous rock that can be identified by its small crystals. The rocks formed by the solidification on the cooling of molten magma are called igneous rocks. All rocks can be classified as either igneous sedimentary or metamorphic depending on how they were formed.

Igneous rocks are classified based on texture and composition. Igneous rocks are formed when magma cools and solidifies. This relates to the cooling history of the molten magma from which it came. The diagram in figure 4 3 1 can be used to help classify igneous rocks by their mineral composition.

An important feature to note on this diagram is the red line separating the. Pyroxene and calcium rich plagioclase feldspar. Classification of igneous rocks based on mineral composition and texture textures reflect rate of cooling phaneritic phaneritic mineral crystals are visible e g. What are they composed of.

RELATED ARTICLE :

• what do you say to someone celebrating yom kippur
• what do you need to go on a cruise
• what do you need to make a blast furnace

When will magma rise to earth s surface. The diagram in figure 3 4 1 can be used to help classify igneous rocks by their mineral composition. When the molten magma cools deep inside the earth s crust intrusive igneous rocks are formed. They are classified by using grain size silica content and or silica saturation.

Igneous rocks are classified into four categories. Felsic intermediate mafic and ultramafic. As has already been described 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. Depending on where the molten magma cools they are of the following types. Igneous rocks are those that cooled directly from lava or magma. What is the classification of igneous rocks based on.

Felsic intermediate mafic and ultramafic based on either their chemistry or their mineral composition.