Rocks formed when heat or pressure is added?

Question: Rocks formed when heat or pressure is added?

Rocks that are formed by the application of heat or pressure, or both, are known as metamorphic rocks. The term "metamorphic" comes from the Greek word "meta" which means change, and "morph" which means form.

Metamorphic rocks are formed from pre-existing rocks, including sedimentary, igneous, or other metamorphic rocks, that have undergone changes due to the application of heat and/or pressure. These changes can occur due to a variety of geologic processes, such as mountain building, subduction, and regional metamorphism.

Examples of common metamorphic rocks include marble, which is formed from limestone that has undergone metamorphism, and slate, which is formed from shale or mudstone that has undergone metamorphism. Other examples include gneiss, schist, and quartzite.

The changes that occur during metamorphism can result in a variety of physical and chemical changes in the rock. For example, the original mineral crystals in the rock may become rearranged or recrystallized into new patterns, or new minerals may form as a result of chemical reactions between the original minerals and fluids circulating through the rock. The application of pressure can also cause the rock to become compacted and harder.

Overall, metamorphic rocks are formed when pre-existing rocks are subjected to heat and/or pressure, resulting in changes to the rock's texture, mineralogy, and overall appearance.

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