Igneous

• • Intrusive - form below Earth's crust
  • cools slowly
  • large crystal
• • Extrusive - forms onto Earth's surface
  • cools quickly
  • small or no crystals
• Colours - felsic = light colours, mofic = dark colours
• Coarse = longer time to cool, more large crystals
• Fine = cools quickly, no or small crystals