• When continents collide, big mountains grow.
  • The formation of Pangaea created long large mountain ranges.
  • The mountains that formed then look a lot like the Himalayas do today.
  • Orogenies take place over tens or hundreds of millions of years.
  • Continents smash into each other.
  • Microcontinents and island arcs smash into continents.
  • All of these events cause mountains to rise.
  • The Appalachians were once higher than the Himalaysas are now.
  • The Taconic Orogeny is an example of a collision between a continent and a volcanic island arc.
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