#metamorphism  change in the structure of rock by natural agencies such as pressure or heat of introduction of new chemical substances
  supertype:  #geological_process  a natural process whereby geological features are modified
  subtype:  #anamorphism  occurs deep under the earth's surface; changes simple minerals into complex minerals
  subtype:  #epigenesis  a geological change in the mineral content of rock after the rock has formed
  subtype:  #katamorphism  occurs at or near the earth's surface; breaks down complex minerals into simpler ones

No statement uses or specializes #metamorphism; click here to add one.