nkatamorphismmetamorphism that occurs at or near the earth's surface; breaks down complex minerals into simpler ones
Century Dictionary and Cyclopedia
nkatamorphismIn geology, any change in the texture of rocks produced by fracturing and granulation, with recrystallization, whereby rocks become finer-grained and foliated, as the production of gneisses and schists from granites. Chamberlin and Salisbury, 1904. According to Van Hise, katamorphism is that phase of metamorphism in which simpler compounds result from the alteration of more complex ones. He includes under such changes weathering and cementation, accompanying oxidation, hydration, and carbonation, chiefly of silicate minerals. The reverse process of metamorphism is called anamorphism.
Katamorphic processes give the important values to chromite deposits.