pneumatolytic metamorphism

pneumatolytic metamorphism

[¦nü·məd·ō¦lid·ik ¦med·ə′mȯr‚fiz·əm]
(petrology)
Contact metamorphism by the chemical action of magmatic gases.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.