1. Elastic Deformation: This involves a temporary change in shape that is reversible. Think of a rubber band being stretched; it returns to its original shape when the force is removed. In the crust, elastic deformation occurs when the stress applied is relatively low. However, if the stress exceeds the elastic limit, the material will undergo permanent deformation.
2. Plastic Deformation: This is a permanent change in shape, meaning the material does not return to its original form. Think of a piece of clay being molded; it retains its new shape even after the pressure is released. In the crust, this type of deformation is associated with high pressure and temperatures, leading to folding and faulting.
Let me know if you'd like to know more about either of these types of deformation!
