encrustation

It is hard and mineralized, this is to say, the warp and woof of silk are hidden by a thick encrustation of sand.

This quickly removes the encrustation if it has not been allowed to grow thick before the attempt is made.

He had reached the end of the narrow passage, and dimly made out a domed room in the rock, white with translucent encrustation.

They laved their wounds, which were intensely sore at first, owing to the encrustation of salt on their skins.

Gabriel sat up on the bed and rapped the bowl of his pipe against the bedpost to loosen some refractory encrustation.