
Metamorphic rock | Definition, Formation, & Facts | Britannica
Feb 3, 2026 · 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 …
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 determined, the …
Metamorphic Rocks – Definition, Formation, Types, & Examples
Feb 2, 2023 · Metamorphic rocks form due to the transformation of preexisting rocks in response to environmental changes such as heat, high pressure, and mechanical stress. The parent rock can be …
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 deep within the …
Metamorphic Rocks – Formation, Types, Examples
Feb 24, 2024 · Metamorphic Rocks: Unlike igneous and sedimentary rocks, metamorphic rocks form by transformation under pressure and heat, leading to new textures and mineral compositions.
Metamorphic Rocks - National Geographic Society
Rocks that undergo a change to form a new rock are referred to as metamorphic rocks. In the rock cycle, there are three different types of rocks: sedimentary, igneous, and metamorphic.
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 conditions often …
Metamorphic Rocks | Formation, Types, Textures & Metamorphism
Metamorphic rocks form when existing rocks are transformed by heat, pressure, and fluid activity deep within Earth’s crust, creating new minerals, textures, and structures that reveal past tectonic events.
Metamorphic Rocks: Formation, Types, Uses, Example
Metamorphic rocks are type of rock that formed when pre-existing rocks (parent rocks) undergo significant physical or chemical changes under high pressure and temperature, without melting …
Metamorphic Rock Definition - Earth Science Key Term | Fiveable
Definition Metamorphic rock is a type of rock that has undergone a transformation due to heat, pressure, or chemically active fluids, altering its original mineral composition and texture.