Best Note about Igneous Rocks

Igeous rocks are those which have solidified from the molten material or the lava ejected from the interior of the earth. They are also known as the primary rocks. The igneous rocks are further divided into extrusive rocks and intrusive rocks. When the solidification takes place on the surface of the earth, the rocks are called extrusive rocks. A typical example of this rock is basalt. It is a very fine grained rock. A typical example of this rock is basalt. It is a very fine grained rock. When the solidification takes place below the surface of the earth, the rocks are known as intrusive rocks. Granite is a typical example of such intrusive igneous rocks. Granite has large crystals.