What is Igneous Rocks | Indian Geography

# It is formed out of magma and lava from the interior of the earth.

# They are also known as primary rocks.
When magma in its upward movement cools and turns into a solid form it is called igneous rock.

# The process of cooling and solidification can happen in the crust of the earth or on the surface of the earth.

# Igneous rocks are classified based on texture.

# If the molten material is Cooled slowly at great depths, mineral grains may be very large.

# Sudden cooling at the surface results in small and smooth grains.

# Intermediate conditions of cooling would result in intermediate sizes of grains making up igneous rocks.

Examples of igneous rocks
Granite
Gabbro
Pegmatite
Basalt
Volcanic
Breccia
Tuff