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Elective Geography Secondary 3 Express (New)- Plate Tectonics 5
 

Elective Geography Secondary 3 Express (New)- Plate Tectonics 5

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  • Suggested activity:Ask students -1. Why are compressional forces only felt at convergent plate boundaries? At convergent plate boundaries, the direction of movement of convection currents cause plates to move towards each other.

Elective Geography Secondary 3 Express (New)- Plate Tectonics 5 Elective Geography Secondary 3 Express (New)- Plate Tectonics 5 Presentation Transcript

  • + Elective Geog (New) Secondary 3 E Week 6: Living with Tectonic Hazards armanalluwie.blogspot.com
  • + 2 Lesson Outcomes  By the end of the lesson, we will be able to  describe the characteristics of fold mountains  describe the characteristics of landforms and phenomena associated with converging continental and oceanic plate boundaries
  • 3armanalluwie.blogspot.com http://www.youtube.com/watch?v=7gXixxYKM80
  • + 4 Fold Mountains  Formed when layers of rocks are compressed and folded  Young – less than 100 million years old  Old- 270- 400 million yearsarmanalluwie.blogspot.com
  • 5
  • 6armanalluwie.blogspot.com
  • + 7 Fold Mountains  Formed when layers of rocks are compressed and folded  Found at Convergent plate boundaries  Common in sedimentary rocksarmanalluwie.blogspot.com
  • 1 2 3
  • + 9 Fold Mountains  Folding  When compressional force creates immense pressure which causes the layers of rocks to buckle and fold  Anticline (Upfold)  Syncline (Downfold)  Fracture  Formed when increasing compressional force on one limb of a fold causes rocks to buckle  Limb moves forward to ride over the other limbarmanalluwie.blogspot.com
  • 11armanalluwie.blogspot.com
  • + Distribution of Fold Mountains
  • + 13 Converging: Continental- Continental Fold Mountain Range
  • 14armanalluwie.blogspot.com
  • 15armanalluwie.blogspot.com
  • + 16 Converging: Oceanic- Continental Continental Plate Fold Mountains buckles and folds On Continental Plate Oceanic Trench Magma rises through At Subduction Zone crusts giving rise to Volcanoes Denser Oceanic Plate Solid mantle material subducts beneath the less melts and forms magma dense Continental Platearmanalluwie.blogspot.com
  • + Converging: Oceanic- Continental Fold Mountains/ Volcanoes Sunda Oceanic Trench
  • 18armanalluwie.blogspot.com
  • + TRANSFORM PLATE BOUNDARY - Plates slide past each other - A fault line is created * Transform plate boundaries are also known as ‘conservative’ plate boundaries
  • + LET’S WRECK IT!
  • +
  • + TRANSFORM PLATE BOUNDARY - The movement results in the formation of a fault - In the process, tremendous stress builds up and is eventually released, often in the forms of tremor and earthquakes
  • + ISTANBUL TURKEY
  • E.g. North Anatolian Fault, Turkey How would the plate movement affect the two cities shown in time to come?
  • +
  • E.g. San Andreas Fault, USA
  • +
  • + ANDES
  • +