Difference between extrusive and intrusive volcanic activity

  • Basic difference is that intrusive volcanic activity takes place BENEATH the surface and extrusive volcanic activity takes place ON the surface.
  • The main types of intrusive are dykes, sills, batholiths and laccoliths
  • Extrusive volcanic activity tends to be the actual volcano, but minor forms of extrusive activity include hot springs, geysers and boiling mud…


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