The Three Types of Rocks

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The Three Types of Rocks

The three types of rocks were formed thousands of years ago because of volcanoes and pressure

Metamorphic rocks thermal were formed from heat and pressure .The rocks are heated during a volcanic eruption. The Dynamic rock structure is altered to move but structure doesn't change This is how mountains are formed. A type of metamorphic rock is marble.

igneous rock is formed when magma cools and crystallisers and make itself very tight the slower.If it it cools for a short amount of time the crystals will be small because they haven't had time to grow whereas if it cools slowly they have time to grow bigger A type of igneous rock is granite used for decoration

Sedimentary rocks are formed by cemented sediments that are broken down rocks organic remains and chemical precipitates . Sedimentray rocks have layers or strata so are called sedimentary. A type of sedimentary rock is limestone that is used for minerals .

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