Aya Alygeo chapter 10

Aya Alygeo chapter 10 - Professor Ohan Chapter 10 1 Within...

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Professor Ohan Chapter 10 1- Within the Earth rocks are continually being subjected to forces that tend to bend them, twist them, or fracture them. When rocks bend, twist or fracture we say that they deform (change shape or size). The forces that cause deformation of rock are referred to as stresses (Force/unit area). So, to understand rock deformation we must first explore these forces or stresses. 2- Stress is a force applied over an area. One type of stress that we are all used to is a uniform stress, called pressure. A uniform stress is a stress wherein the forces act equally from all directions. In the Earth the pressure due to the weight of overlying rocks is a uniform stress, and is sometimes referred to as confining stress. 3- Folds-bending of the rocks without breaking Faults-fracture of rocks with displacement Joints-fracture of rocks without displacement joints affects the resistance of rocks and making it susceptible to weathering 4- If stress is not equal from all directions then we say that the stress is a differential stress. Three kinds of differential stress occur.
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This note was uploaded on 02/05/2012 for the course GEOLOGY 101-101 taught by Professor Ohan during the Spring '11 term at CUNY City.

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Aya Alygeo chapter 10 - Professor Ohan Chapter 10 1 Within...

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