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Deforming Earth’s Crust. Stress = Force Arrows Stress: Amount of force per unit area The reaction when rocks change shape due to stress is called Deformation.

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Presentation on theme: "Deforming Earth’s Crust. Stress = Force Arrows Stress: Amount of force per unit area The reaction when rocks change shape due to stress is called Deformation."— Presentation transcript:

1 Deforming Earth’s Crust

2 Stress = Force Arrows Stress: Amount of force per unit area The reaction when rocks change shape due to stress is called Deformation Three types of stress: Compression Tension Shear

3 Compression Stress when objects are squeezed Occurs at a convergent boundary Force that builds folded mountains

4 Tension Stress when forces stretch an object Occurs at divergent boundary Mid-ocean ridge

5 Shearing Pushes rock in two opposite directions Occurs at transform boundary

6 Folding When layers bend due to stress in the Earth’s Crust Three types of folds are: Anticline Syncline monocline

7 Folds Draw the 3 types of Folds Include Force arrows Under each drawing identify what type of tectonic plate boundary the fold would occur Answer D

8 Faulting Surface in which rock break and slide on each other Blocks on each side are identified as Fault Blocks Two sides are identified as: Footwall Hanging wall

9 Faults Take Play-Doh Mold into two blocks One block should have a footwall One block should have a hanging wall

10 Faults Three types of Faults are: Normal Reverse Strike-slip Draw the three faults Answer question F Answer question G


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