schistify

present singular third person schistifies · participle present schistifying · participle past schistified · past schistified

1. To develop or cause to develop into schist.

   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.

   1912, Coal Age - Volume 1, page 518

   2 more examples

   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.

   1910, J. Taffanel, Abstract of the Reports on the French Coaldust Experiments

   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.

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