Tectonic Hazards

• Conservative plate margin

  
  

  Plates move side by side

  Plates move - friction occurs

  Pressure builds

  When pressure released, sends out energy

  Causes earthqueake
• Constructive Plate margin

  
  

  The plates move away from eachother

  Magma moves up from mantle making new land in form of shield volcano

  Separation of plate can cause earthquake
• Destructive Plate Margin

  
  

  Oceanic plate forced underneath continental plate(subduction)

  Oceanic plate more denser

  Plate sinks into mantle forming magma-pressure build

  Magma rises through weakness in rocks
• Tectonic Hazard

  • Threats caused by movement of tectonic plates which have potential to cause harm
• Tectonic Plates

  • Structure of Earth‘s crust
  • Crust broken into slabs (plates)
  • Continental crust or oceanic crust
• Plates move because of the movement of magma - creates convection current
• Convection Current process

  1. Core heats up magma in mantle
  2. Magma less dense than surroundings and rises upwards
  3. When reaches top it cools
  4. Becomes more dense and sinks down
  5. Heated up again and cycle repeats
• Continental Plate

  • Makes up the land
  • Less dense
  • Thick
• Oceanic

  • Makes up the ocean floor
  • Dense
  • Thin