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Folding and Faulting Chapter 4, Sec. 4 Stress Amount of force per area put on an object Rocks can change shape due to stress Three types of stress: Compression Tension Shear FOLDING Rock layers bend due to stress Assume most rocks are laid down horizontal FAULTS The line along which rocks break and move Normal Faults Caused by tension forces Hanging wall moves down Reverse Faults Caused by compression forces Hanging wall moves up Strike-slip Faults Opposing forces cause rock to break Move horizontally
