How are intrusive and extrusive rocks are formed
Answers
Answer:
Explanation:
The two main categories of igneous rocks are extrusive and intrusive. Extrusive rocks are formed on the surface of the Earth from lava, which is magma that has emerged from underground. Intrusive rocks are formed from magma that cools and solidifies within the crust of the planet.
Answer:
Both extrusive and intrusive rocks are examples of igneous rocks. Igneous rocks are also known as primary rocks. Extrusive rocks are formed when the molten magma present inside the earth's interior comes out onto the earth's surface, cools down rapidly and becomes solid on the earth's crust. These rocks have a very fine-grained structure. For example, basalt. Deccan plateau is made of basalt rocks. When molten magma cools down and solidifies deep within the earth's crust, intrusive rocks are formed. Since they cool down slowly, they form large grains. Granite is an example of such a rock. Grinding stones used to prepare paste/powder of spices and grains are made of granite. Nowadays, granite is also used for flooring.