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  1. Metamorphic rock - Wikipedia

    Metamorphic rocks are one of the three great divisions of all rock types, and so there is a great variety of metamorphic rock types. In general, if the protolith of a metamorphic rock can be …

  2. Metamorphic rock | Definition, Formation, & Facts | Britannica

    Dec 27, 2025 · Metamorphic rock, any rock that results from the alteration of preexisting rocks in response to changing conditions, such as variations in temperature, pressure, and mechanical …

  3. What are metamorphic rocks? | U.S. Geological Survey

    Metamorphic rocks form when rocks are subjected to high heat, high pressure, hot mineral-rich fluids or, more commonly, some combination of these factors. Conditions like these are found …

  4. Metamorphic Rocks – Formation, Types, Examples

    Feb 24, 2024 · Learn about metamorphic rocks in geology. Discover how they form, the types, examples, and how to identify them.

  5. Metamorphic Rocks - Education

    Oct 19, 2023 · Metamorphic rocks start as one type of rock and—with pressure, heat, and time—gradually change into a new type of rock.

  6. What Are Some Common Types of Metamorphic Rocks?

    5 days ago · Metamorphic rocks are one of the three major rock types on Earth, formed through a process of profound transformation. They begin as existing igneous, sedimentary, or even …

  7. Metamorphic Rocks - Geology (U.S. National Park Service)

    Oct 27, 2021 · Metamorphic rocks form when high temperatures and pressure act on a rock to alter its physical and chemical properties (metamorphism means 'to change form'). These …

  8. 6 Metamorphic Rocks – An Introduction to Geology

    Metamorphic rocks are created when heat, pressure, and/or fluids change preexisting rocks. The rock cycle shows that both igneous and sedimentary rocks can become metamorphic rocks. …

  9. METAMORPHIC Definition & Meaning - Merriam-Webster

    The meaning of METAMORPHIC is of or relating to metamorphosis. How to use metamorphic in a sentence.

  10. Metamorphic Rocks | Earth Science - Lumen Learning

    Metamorphism is the addition of heat and/or pressure to existing rocks, which causes them to change physically and/or chemically so that they become a new rock. Metamorphic rocks may …