Definitionn. change in the structure of rock by natural agencies such as pressure or heat or introduction of new chemical substances
Last update: July 12, 2015
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They are typical products of "regional" metamorphism, and are in nearly all cases older than the fossiliferous sedimentary rocks. [Please select]
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His teachers had inculcated the view that these eminences belonged to a synclinal disposition, coupling this with theoretical assertions as to their age and metamorphism. [Please select]
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