contact metamorphism

noun Geology.
localized metamorphism resulting from the heat of an igneous intrusion.

Origin:
1875–80

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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American Heritage
Science Dictionary
contact metamorphism  
A type of metamorphism in which the mineralogy and texture of a body of rock are changed by exposure to the pressure and extreme temperature associated with a body of intruding magma. Contact metamorphism often results in the formation of valuable minerals, such as garnet and emery, through the interaction of the hot magma with adjacent rock. See also aureole. Compare regional metamorphism.
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Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Example sentences
Another type of metamorphism, contact metamorphism, occurs when hot igneous
  rock intrudes into some pre-existing rock.
Contact metamorphism is a result of heat generated from a nearby magma source.
Two of the common types are: regional metamorphism and contact metamorphism.
Contact metamorphism, which occurs when a body of magma intrudes into existing
  rock, also forms ores.
Image for contact metamorphism
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