GEOLOGY

Detailed explanation-1: -The rocks then have three possible responses to increasing stress: elastic deformation, plastic deformation, or fracturing.

Detailed explanation-2: -Rocks have three possible responses to increasing stress (illustrated in figure 3): elastic deformation: the rock returns to its original shape when the stress is removed. plastic deformation: the rock does not return to its original shape when the stress is removed. fracture: the rock breaks.

Detailed explanation-3: -Compressional stresses cause a rock to shorten. Tensional stresses cause a rock to elongate, or pull apart. Shear stresses causes rocks to slip past each other.

Detailed explanation-4: -Stress and Strain A uniform stress is where the forces act equally from all directions. In the Earth the pressure due to the weight of overlying rocks is a uniform stress and is referred to as confining stress. If stress is not equal from all directions then the stress is a differential stress.

Detailed explanation-5: -There are four types of stresses that affect rocks: confining, compression, tension, or shear. Rocks under stress may show strain or deformation. Deformation can be elastic or plastic, or the rock may fracture. The amount of stress on a rock may be greater than the rock’s strength.