schistify

From schist +‎ -ify.

schistify (third-person singular simple present schistifies, present participle schistifying, simple past and past participle schistified)

1. To develop or cause to develop into schist.
   • 1910, J. Taffanel, Abstract of the Reports on the French Coaldust Experiments:

     If the desired proportions are not attained naturally, the formation and deposition of coaldust may occasionally be considerably lessened by the adoption of simple precautions, such as: watering at the face, so as to lessen the dust deposits in the return airways; washing the tubs, and using sound tubs that will not shed so much dust in the haulage roads; and limewashing, which fixes the dust on the walls and schistifies the floor.

   • 1912, Coal Age - Volume 1, page 518:

     In other mines with a shale roof, the constant dropping of top- rock serves, especially when it tends to slake, to schistify the floor of the mines.

   • 1933, Geological Survey of Canada, Summary Report of the Geological Survey Department:

     To the west along the strike from the main schist and quartz body, the conglomerate is drag-folded and schistified, and there is but little quartz or sulphide up to 430 feet from the shaft, where a schist lens has been trenched for 50 feet along the strike and 30 feet across at its widest point.