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A metamorphic rock is an igneous, sedimentary, or another metamorphic rock that has been: 1) squeezed by incredible pressures deep underground, 2) has been exposed to very hot fluids, 3) has been exposed to very high temperatures without melt occurring, 4) combinations of numbers 1-3. Rock exposed to these conditions can be metamorphosed, altering its structure, mineral alignment, and possibly its chemistry.

Examples are slate, schist, anthracite, metaconglomerate, and gneiss.

a metamorphic rock is a rock that has changed because of intense heat or pressure.rock altered by pressure and heat.
A metamorphic rock is one that has been significantly changed from its original condition. At least by heating due to re-burial, and sometimes by being completely re-melted before subsequent crystallization. In either process, some of the original minerals have become mobilized to create new minerals. During intense metamorphism, the original layering of the rock will be destroyed.

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What rock was oringinally a metamorphic rock?

No rock was originally a metamorphic rock. By the definition of the word metamorphic rocks are rocks that have been formed from other rocks (sedimentary or igneous) either by formation of new minerals because of temperature and pressure changes or by changing the texture of the rock by large stresses shearing the rock.


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It is important to learn how to use new vocabulary in a sentence. While we were exploring we found a metamorphic rock.


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