Granite - coarse-grained rock that is hard., Chalk - rock that is formed from the skeletons of tiny sea animals., Marble - is used to make floor tiles and wall tiles., Igneous Rocks - is formed when magma cools and solidifies., Examples of igneous rocks - include basalt, granite, pumice, and andesite., Metamorphic Rocks - can be formed by pressure deep under the Earth's surface, Examples of metamorphic rocks - include anthracite, quartzite, marble and slate, , Sedimentary rocks - are formed by sediment that is deposited usually as layers at the bottom of lakes and oceans., Examples of sedimentary rocks - limestone, sandstone, mudstone, chalk, coal and claystone,

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