WHY ARE IGNEOUSE ROCKS ARE CALLED PRIMARY ROCK ?
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- Igneous rocks are created from the cooling of molten magma/lava. All other rocks are derived from them. Because they form the basis of formation of other types of rocks, igneous rocks are known as the primary rocks.
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Ans Igneous rocks are also called primary rocks because all other rocks are directly or
indirectly formed from them. They make up a large percentage of the earth crust.
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