classification of rocks

Describe the classification of rocks?

What are the 3 classifications of rocks?

Rocks are classified as follows:-

(i) Igneous rocks: These rocks are formed due to solidification of molten magma of Earth’s crust. Igneous rocks are further classified as plutonic rocks and volcanic rocks. Plutonic rocks are formed due to rising up of hot magma form the Earth’s crust and which gets cooled and solidified before it reaches the Earth’s surface. Volcanic rock is formed due to arrival of hot magma (or lava) o the Earth’s surface before it gets cooled.



(ii) Sedimentary rocks: These are formed due to deposition of material on the earth’s surface. This deposited material is usually the product of weathering and erosion. Consolidation of these deposited material forms sedimentary rocks.



(iii) Metamorphic rocks: These rocks are formed due to metamorphism i.e., the igneous and sedimentary rocks when subjected to high temperatures, high pressures or chemical action undergo major change in their mineralogical character. The resulting rock is referred to as metamorphic rock.For example: Mica, gneiss, Schist, calcite etc,





SOME QUESTIONS-

What are the 3 classifications of rocks?
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What are the 5 types of rocks?

How do you identify different types of rocks?


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answers-
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