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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. 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 …

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

    metamorphic rock, any of a class of rocks that result from the alteration of preexisting rocks in response to changing environmental conditions, such as variations in temperature, pressure, …

  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 - 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 …

  6. 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.

  7. 16.4: Types of Metamorphism and Where They Occur

    As metamorphic processes go, burial metamorphism takes place at relatively low temperatures (up to ~300 °C) and pressures (100s of m depth). To the unaided eye, metamorphic changes …

  8. METAMORPHIC Definition & Meaning - Merriam-Webster

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

  9. Metamorphic Rocks | Pictures of Foliated and Non-Foliated Types

    Metamorphic rocks have been modified by heat, pressure, and chemical processes, usually while buried deep below Earth's surface. Exposure to these extreme conditions has altered the …

  10. Metamorphic Rock Types: Pictures and Descriptions - ThoughtCo

    May 5, 2025 · The major types of metamorphic rocks are detailed here, which include regional, contact and mechanical metamorphism.