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Published byHugo Wilkerson Modified over 9 years ago
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7-4c pgs. 183-184 IN: List and describe the 3 types of rock folding. Put your Worksheet on the box
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http://ees.as.uky.edu/sites/default/files/elearning/module10swf.swf
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Fault – a break in the Earth’s crust along which blocks of the crust slide relative to one another due to tectonic forces.
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NAMING FAULTS When the ground breaks, sections are moving with respect to each other. The ground above the fault = Hanging Wall. The ground below the fault = Footwall.
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Normal Faults Reverse Faults Strike-Slip Faults
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Tensional (pulling) stress Allows the hanging wall to slide down
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Compressional (pushing) Stress Causes the hanging wall to move up Stress
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Shearing (sliding) stress causes one block to slide past the other horizontally. Two types – right and left lateral
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Stress is still compressional (pushing), but the fault lies at a low angle. Now the hanging wall gets pushed up and over the footwall
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http://www.iris.edu/gifs/animations/faults.h tm http://www.iris.edu/gifs/animations/faults.h tm
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Elasticity of the rock material Ductile material – limestones and clays Brittle material – sandstones and granites Amount of stress Speed that the stress is applied
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OUT: If a fault occurs in an area where rock layers have been folded, which type of fault is it likely to be? Why?
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