What causes rocks to change and form into new types of rocks?

The three main rock types are igneous, metamorphic and sedimentary. The three processes that change one rock to another are crystallization, metamorphism, and erosion and sedimentation. Any rock can transform into any other rock by passing through one or more of these processes. This creates the rock cycle.

The three main rock types are igneous, metamorphic and sedimentary. The three processes that change one rock to another are crystallization, metamorphism, and erosion and sedimentation. Any rock can transform into any other rock by passing through one or more of these processes. This creates the rock cycle. Also, new minerals can grow in the spaces within the material, cementing it together. Some sedimentary rocks form in other ways, as when water evaporates, leaving behind minerals that were dissolved in it. (MEHT-uh-MAWR-fihk) forms when heat or pressure causes older rocks to change into new types of rock.

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because natural gas is colorless, odorless, and tasteless, distributors add mercaptan (a chemical that smells like sulfur) to give natural gas a distinct unpleasant odor (it smells like rotten eggs). they locate the types of rock that are likely to contain natural gas deposits.