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Explain what happens during contact metamorphism?

Contact Metamorphism occurs when magma comes in contact with an already existing body of rock. When this happens the existing rocks temperature rises and also becomes infiltrated with fluid from the magma. The area affected by the contact of magma is usually small, from 1 to 10 kilometres.

Explanation:

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 takes place where a body of magma intrudes into the upper part of the crust. Contact metamorphism can take place over a wide range of temperatures  from around 300° to over 800°C  and of course the type of metamorphism, and new minerals formed, will vary accordingly.

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