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A '''rock''' is a solid material made of one or more [[mineral]]s. The minerals the rock is made of help determine the properties of that rock. All of the rocks in the earth's crust can be grouped into three categories based on how they formed. Rocks are classified into three groups. The way a rock formed determines which group it is in. They may range in size from tiny pebbles to huge [[mountain]]s. Rocks make up the earth’s crust. Many rocks are not solid -- such as [[magma]], [[dirt]], and [[clay]]. In general, the only people interested in rocks are geologists. Different mineral deposits can be found in related rock formations, providing use by estimating what minerals rock formations may contain.
==Types of Rocks==
* [[Igneous Rock]]s
* [[Sedimentary Rock]]s
* [[Metamorphous Rock]]s
''Rock'' may also refer to [[Rock and Roll]].
==Types of Rocks==
* [[Igneous Rock]]s
* [[Sedimentary Rock]]s
* [[Metamorphous Rock]]s
''Rock'' may also refer to [[Rock and Roll]].