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Unit 2: Tectonic Process Ms. Thind
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Rocks under pressure or tension fracture under strain If movement takes place along a fracture a rift is formed faulting Landforms produced by faulting: Normal Fault, Reverse or Thrust Fault, Rift Valley or Graben, and Block Mountain or Horst Faulting:
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Along the line of a fault one section of rock may be forced down to create a fault scarp (fault cliff) Tension (think stretching of rock) results in a normal fault What does this look like? *take out a sheet of paper* Normal Fault
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http://www.fossweb.com/CA/modules3- 6/SolidEarth/activities/geologylab/faultingandfoldin g/earth-processes/faulting.htm
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Along the line of a fracture one section of rock is pushed upward as a result of compression (pushing together) http://www.fossweb.com/CA/modules3- 6/SolidEarth/activities/geologylab/faultingandfoldin g/earth-processes/faulting-r.htm What does this look like? Reverse or Thrust Fault
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Blocks that have been elevated on a much larger scale form mountain ranges called fault block mountains or horsts formed by tension What does this look like? Block Mountain or Horst
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Faulting may cause blocks to slip down and form steep sided rift valleys called grabens caused by tension What does this look like? Rift Valley or Graben
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When two tectonic plates collide the rock layers fold and squeeze together over a long period of time because of increasing pressure Upfolds are called anticlines Downfolds are called synclines Folding
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http://www.classzone.com/books/earth_science/te rc/content/investigations/es1106/es1106page02.cfm http://www.classzone.com/books/earth_science/te rc/content/investigations/es1106/es1106page02.cfm
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