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Definition of Metamorphic rock

Metamorphic rock Definition from Business & Finance Dictionaries & Glossaries
Glossary of petroleum Industry
a rock derived from preexisting rocks by mineralogical, chemical, and structural alterations caused by processes within the earth's crust. Marble is a metamorphic rock.
Metamorphic rock Definition from Science & Technology Dictionaries & Glossaries
Soil Glossary - Mani
A rock that has been derived from other rocks by heat and pressure. The original rock may have been igneous, sedimentary, or another metamorphic rock.
Agricultural Glossary/yigini2004
: A rock that has been derived from other rocks by heat and pressure. The original rock may have been igneous, sedimentary, or another metamorphic rock.
Glossary Of Geography
Rock that has been physically altered by heat and/or pressure.
Metamorphic rock Definition from Encyclopedia Dictionaries & Glossaries
Wikipedia English - The Free Encyclopedia
Metamorphic rocks arise from the transformation of existing rock types, in a process called metamorphism, which means "change in form". The original rock (protolith) is subjected to heat (temperatures greater than 150 to 200 °C) and pressure (1500 bars), causing profound physical and/or chemical change. The protolith may be sedimentary rock, igneous rock or another older metamorphic rock.

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Metamorphic rock Definition from Society & Culture Dictionaries & Glossaries
Environmental Engineering (English ver.)
(Geology) A sedimentary or igneous rock that has been changed by pressure, heat, or chemical action. For example, limestone, a sedimentary rock, is converted to marble, a metamorphic rock.
Metamorphic rock Definition from Entertainment & Music Dictionaries & Glossaries
English to Federation-Standard Golic Vulcan
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Metamorphic rock Definition from Language, Idioms & Slang Dictionaries & Glossaries
WordNet 2.0

Noun
1. rock altered by pressure and heat
(hypernym) rock, stone
(hyponym) amphibolite