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Origin of igneous rocks

Igneous rocks are the types of rock goes back to millions years ago and they derive of intense underground heat and of the solidification of the lave.
The most important material derived by igneous rock is granite. Granite is a material very durable and water resistant.
Metamorphic rocks are formed by transformation of igneous and sedimentary rocks. Slate and marble are metamorphic rocks. This types of metamorphic rock are trained by chemical process. Marble has a different color and it is used for decorative purposes.

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