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metamorphic rock
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2 dictionary results for: Metamorphic rock
WordNet - Cite This Source - Share This
metamorphic rock

noun
rock altered by pressure and heat 

WordNet® 3.0, © 2006 by Princeton University.
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American Heritage New Dictionary of Cultural Literacy, Third Edition - Cite This Source - Share This
metamorphic rock

Rock that was once one form of rock but has changed to another under the influence of heat, pressure, or some other agent without passing through a liquid phase.

Note: Examples are marble, which can be formed from limestone, and slate, which is formed from shale.

The American Heritage® New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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