GEOLOGY

Detailed explanation-1: -A common example of elastic deformation is the change in shape a rubber band experiences when you pull on it. Once this stress is removed, the rubber band returns to its original shape. As rocks pass their elastic limits they experience ductile deformation. Ductile deformation is irreversible.

Detailed explanation-2: -Deformation of Ductile Rocks When rocks deform in a ductile manner, instead of fracturing to form faults or joints, they may bend or fold, and the resulting structures are called folds. Folds result from compressional stresses or shear stresses acting over considerable time.

Detailed explanation-3: -7.1 BRITTLE AND DUCTILE DEFORMATION Brittle deformation is when rocks fail as rigid solids (Fig. 7.1A). The rocks will break, rather than bend, under these conditions to produce fractures. Brittle deformation occurs along discrete planes in the rock instead of involving the rock body as a whole.

Detailed explanation-4: -An elastic deformation is defined as one that disappears when the stress responsible for it ceases. From: Encyclopedia of Geology, 2005.