This article appears to be a dictionary definition. Please rewrite it to present the subject from an encyclopedic point of view.(May 2023)
Pneumatolysis is an obsolete geologic term for magma emitting gasses that alter surrounding rock or crystallize minerals.[1] Pneumatolysis is now considered a type of hydrothermal interaction.
^Robert L Bates, Julia A Jackson, ed. (1984). Dictionary of Geological Terms: Third Edition. American Geological Institute. p. 392.
Further reading
Philip Lake and R. H. Rastall. A textbook of geology (1920). 3rd ed. Edward Arnold: London. [1] pp. 251-255 describes pneumatolysis, especially in granites.
McGraw-Hill Encyclopedia of the Geological Sciences. Second edition. New York: McGraw-Hill, 1987. p. 518