There are three major types of rocks based on their formation
Major types of rocks
Igneous Rocks
Sedimentary Rocks
Metamorphic Rocks
Igneous Rocks
Formed when the molten matter inside the Earth called magma comes out of a volcano and later cools down and solidifies
Types of Igneous Rocks
Intrusive Igneous Rocks (magma cools down and solidifies inside the earth's surface)
Extrusive Igneous Rocks (magma erupts above the earth's surface and solidifies)
Igneous Rocks
Pumice
Granite
Sedimentary Rocks
Comprised of sediments such as minerals, small pieces of plants and other organic matter that have been compressed and deposited over a long time
Sedimentary Rocks
Sandstone
Coal
Metamorphic Rocks
Formed when the igneous and sedimentary rocks are exposed to high temperatures and pressures, undergoing a process called Metamorphism which transforms them into denser, more compact rocks
Metamorphic Rocks
Slate
Marble
The upper segment of the Earth's crust is made of about 95% of Igneous Rocks
The Taj Mahal in India is completely made of different types of Marble, a metamorphic rock
