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Igneous rocks are formed when molten lava cools and solidifies. ... The minerals in igneous rocks are formed from the magma after the cristallisation temperature is reached. In metamorphic rocks, minerals are altered or recrystallised from the existing rock minerals because of the effect of heat and temperature.

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Minerals are formed in igneous rocks after t the crystallization temperature of molten magma is reached.

Minerals are formed in sedimentary rocks  either by rearrangement of mineral components or by reactions with fluids which enter the rocks.

What are  igneous rocks

Igneous rocks are crystalline or glassy rocks which are formed due to  the cooling and solidification or crystallization of molten magma.

What are Metamorphic Rocks

Metamorphic rocks are rocks which are formed as a result of  alteration or changing of already preexisting rocks due to changes in  environmental conditions, such as alterations  in temperature, pressure, and mechanical stress. They also result from the addition or subtraction of minerals.

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