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Rocks and Minerals for UPSC

Filed under: Geography Earth on 2021-06-24 16:09:03
# The earth’s crust is made up of various types of rocks.

# Rock- Any natural mass of mineral matter that makes up the earth’s crust.

# There are three major types of rocks-
Igneous rocks-when the molten magma cools; it solidifies to become igneous rock.

# Sedimentary rocks- igneous rocks are broken down into small particles that are transported and deposited to form sedimentary rocks.

# Metamorphic rocks- When the igneous and sedimentary rocks are subjected to heat and pressure, they change into metamorphic rocks.

# Rocks are made up of different minerals.
Minerals- are naturally occurring substances which have certain physical properties and definite chemical composition.

# Minerals are very important to humankind. Some are used as fuels. For example, coal, natural gas and petroleum. They are also used in industries – iron, aluminium, gold, uranium, etc., in medicine, in fertilisers, etc.
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