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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Transcript of 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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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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FaultFault – a break in the Earth’s – a break in the Earth’s crust along which blocks of the crust along which blocks of the crust slide relative to one crust slide relative to one another due to tectonic forces.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) stressTensional (pulling) stress Allows the hanging wall to slide Allows the hanging wall to slide
downdown
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Compressional (pushing) StressCompressional (pushing) Stress Causes the hanging wall to Causes the hanging wall to
move upmove 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.htm
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Elasticity of the rock materialDuctile 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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