When the magma found beneath the earth crust originated and flows in the interior and exterior of earth's surface which cools and solidify to form igneous. Igneous rocks are the parent of of other rocks. Due to weathering, erosion and loading the igneous rocks transported and deposited the sediments for the second transformation is known as sedimentary rocks. Again the rocks changes into metamorphic rocks due to the chemical action that occurs in the igneous and sedimentary rocks. Finally the metamorphic rocks changes into magma due to heating, melting and viseversa.
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