Tectonic plates

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Tectonic plates

  1. 1. Tectonic plates
  2. 2. Tectonic PlatesOur first evidence of tectonic motion is based on similar fossils androck types on opposing sides of the ocean
  3. 3. Tectonic Plates
  4. 4. Tectonic PlatesToday plate boundaries are determined by examining the location of volcanoes and earthquakes.Volcanoes result from the friction (heat) of the platesmotion.Earthquakes occur where plate rub against one another
  5. 5. Tectonic Plates
  6. 6. Tectonic Plates Volcanoes
  7. 7. Tectonic Plates
  8. 8. Tectonic Plates
  9. 9. Tectonic Plates
  10. 10. Tectonic Plates- oceanic ridge
  11. 11. Tectonic PlatesAnother source of evidence is based on seafloor ages which get younger as we approachsea floor ridges
  12. 12. Plate Types• Oceanic plates: basalt – Dark (black) and dense rock type composed of silicates, iron and magnesium• Continental plates – granite and andesite – Light colored (pink, white and gray) and low density rock type composed almost entirely of silicates.
  13. 13. The movement of the tectonic plates cause:• SEAFLOOR SPREADING.• VOLCANOES• EARTHQUAKES• MOUNTAIN FORMATION• MOVEMENT OF CONTINENTS

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