Folding and Faulting Chapter 4, Sec. 4.

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Presentation transcript:

Folding and Faulting Chapter 4, Sec. 4

Amount of force per area put on an object 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

The line along which rocks break and move FAULTS The line along which rocks break and move

Caused by tension forces Hanging wall moves down Normal Faults Caused by tension forces Hanging wall moves down

Reverse Faults Caused by compression forces Hanging wall moves up

Opposing forces cause rock to break Strike-slip Faults Opposing forces cause rock to break Move horizontally