The deformational process in which mineral grains behave like plastic and, when compressed or sheared, become flattened or elongate without cracking or breaking.
A permanent change in shape or size experienced by a solid subjected to stress. Plastic deformation is thus more severe than elasticdeformation.
Deformation that remains after the load causing it is removed. It is the permanent part of the deformation beyond the elastic limit of a material. It also is called plastic strain and plastic flow.