• Plates experience stress when they collide, move apart, or slide past each other.
  • 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.
  • If more stress is applied to the rock, it bends and flows.
  • Near the surface, if the stress continues, the rock will fracture and break.
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