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Mountain Building

Mountain Building . Chapter 11 September 29, 2010. Complete the following using Ch . 11 of your textbook (page 308 ) on your warm up doc: Define deformation Define stress Define strain List the three types of deformation List the three types of stress

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Mountain Building

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  1. Mountain Building Chapter 11 September 29, 2010

  2. Complete the following using Ch. 11 of your textbook (page 308) on your warm up doc: • Define deformation • Define stress • Define strain • List the three types of deformation • List the three types of stress • Which type of fault (p. 312) could result in having older rock layers on top of younger rock layers?

  3. Exploratory Lab • In groups, you are going to complete the Inquiry Activity on page 307 • Be careful with the sticks- if you do not behave maturely, you will not be allowed to do labs • Record your observations for Steps 1-4 and answer the Think About Itquestions

  4. Objectives 9/29/10 • I will be able to… DESCRIBE THE FACTORS AFFECTING ______________________ • I will be able to… DIFFERENTIATE BETWEEN THE ________________CAUSING ROCK DEFORMATION

  5. Key Points • __________occurs when there is a change in the size and/or shape of a rock body • Deformation is caused by movements of tectonic plates and interactions at plate boundaries • Types of deformation: ductile, elastic and brittle • _______is the force per unit area that is acting on a solid • Types of stress: compressional, tensional, shear • Strain is the change in shape of a rock as a result of stress

  6. Rock Deformation • Rocks are strong- but no matter how strong, there is a point when rocks will ____________ • Deformation refers to __________________ _____________________________________ • Most deformation occurs along _____margins

  7. Rock Deformation • Deformation is the result of ________ • Stress is the ________ per unit area that is acting on a solid • When a rock is put under more stress than it can handle it will deform- usually by _______ _____________________

  8. Rock Deformation • The ____________ that is caused by stress on rocks is called _____________ • Factors influencing the strength of a rock and how it will deform: • ____________ • ___________types • Confining ____________ • ___________

  9. Types of Deformation • ______deformation: rocks _______to their original size and shape when the force is removed • Stress is applied ____________ • _______deformation: rocks _______and fracture • Temperatures and confining pressures are ______ • _____________deformation: rocks change their shape and size _________________ • Temperatures and confining pressures are _______

  10. Factors Affecting Deformation • Temperature and Pressure • __________temperatures and pressure increase the likelihood the rock will show __________deformation • Rock Type • Rocks with _______bonds usually show brittle deformation • Sedimentary and foliated metamorphic rocks are more likely to show ductile deformation • Time • Forces that might not deform a rock at first can cause a rock to show _______deformation if applied over a long period of time

  11. Types of Stress • _________ - pull apart • __________ - squeeze together • _______ - top and bottom are pushed in different directions

  12. Types of Stress • Can you think of some examples of each type of stress? • Tensional • Compressional • Shear

  13. Examples of Stress • Brainstorm examples of the different types of stress from life: (at least 3 types for each) Tensional Compressional Shear

  14. Examples of Stress • Choose one example from the list for each type of stress. • Write 2 sentences explaining the affect the stress has in each example.

  15. Predicting Stress • PREDICT what sort of affect each of those types of stress might have on a mountain being formed. • Write 2 sentences explaining the affect each type of stress might have on a new mountain.

  16. Check-in • Define deformation: • What are the 3 types of rock deformation? • What type of deformation involves rocks returning to their original shape and size after stress is removed? • What type of deformation involves rocks permanently changing shape without fracturing? • What are the three types of stress?

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