how are minral formed in ignitious and metamorphic rock
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In igneous and metamorphic rocks, minerals may occur in the cracks, crevices, faults or joints. The smaller occurrences are known as veins and the larger are known as lodes. In most cases, they are formed when minerals in liquid/molten and gaseous forms are forced upwards through cavities towards the earth’s surface. They cool and solidify as they rise.
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igneous rocks and metamorphic rocks are build by volcanic lava .
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