IgneousIgneous rock is one of the three main rock types, Igneous rock is formed through the cooling and solidification of magma or lava, they may form with or without crystallisation.
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MetamorphicA metamorphic rock is a result of a transformation of a pre-existing rock. The original rock is subjected to very high heat and pressure.
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SedimentarySedimentary rocks are types of rock that are formed by the deposition and subsequent of that material at the Earth's surface.
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