intumesced

"By this process the upper zone of crystalline matter, which had intumesced so far as to allow of the escape of its aqueous vapor and of much of its mica and quartz, was resolidified, the component crystals arranging themselves in planes perpendicular to the direction of the pressure by which the mass was consolidated -- that is, to the radius of the globe.

A History of Science: in Five Volumes. Volume III: Modern development of the physical sciences 1904