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Hello welcome to my wiki about rocks!!!
 * Igneous** rocks are formed when volcanoes erupt, causing the magma to rise above the earth's surface. Igneous rocks are formed as the lava cools above ground.


 * Sedimentary** rocks
 * Metamorphic** rocks form deep within the Earth, when heat and pressure are applied to either igneous rocks, or sedimentary rocks. This heat, and pressure in essence 'cooks' the rocks, changing their structure