1. Lithospheric Plate Boundaries Plate Tectonics Part 2

2. Type of Boundary DescriptionSpecial FeatureExample DIVERGENT CONVERGENT TRANSFORM HOT SPOT

3. Type of Boundary DescriptionSpecial FeatureExample DIVERGENT2 plates separate from each other Move in opposite drx Rift valley Mid Ocean Ridge Sea floor spreading Mid Atlantic Ridge Iceland Red Sea Gulf of Aden CONVERGENT TRANSFORM HOT SPOT

4. Type of Boundary DescriptionSpecial FeatureExample DIVERGENT2 plates separate from each other Move in opposite drx Rift valley Mid Ocean Ridge Sea floor spreading Mid Atlantic Ridge Iceland Red Sea Gulf of Aden CONVERGENT2 plates move toward each other collide Subduction zone Mountain chain Volcanoes/EQ Deep sea trenches Mt. St. Helens Andes Mtns. Japan/Philippines Marianas Trench TRANSFORM HOT SPOT

5. Type of Boundary DescriptionSpecial FeatureExample DIVERGENT2 plates separate from each other Move in opposite drx Rift valley Mid Ocean Ridge Sea floor spreading Mid Atlantic Ridge Iceland Red Sea Gulf of Aden CONVERGENT2 plates move toward each other collide Subduction zone Mountain chain Volcanoes/EQ Deep sea trenches Mt. St. Helens Andes Mtns. Japan/Philippines Marianas Trench TRANSFORMPlates slide past each other Stress earthquakes San Andreas Fault HOT SPOT

6. Type of Boundary DescriptionSpecial FeatureExample DIVERGENT2 plates separate from each other Move in opposite drx Rift valley Mid Ocean Ridge Sea floor spreading Mid Atlantic Ridge Iceland Red Sea Gulf of Aden CONVERGENT2 plates move toward each other collide Subduction zone Mountain chain Volcanoes/EQ Deep sea trenches Mt. St. Helens Andes Mtns. Japan/Philippines Marianas Trench TRANSFORMPlates slide past each other Stress earthquakes San Andreas Fault HOT SPOTMagma rises and punches through the middle of a plate Island chains form as the plate moves OR Geysers erupt Hawaii Yellowstone NP

7. WHAT CAUSES TECTONIC ACTIVITY? 1.CONVECTION – internal heat of the Earth rises 2.RADIOACTIVE DECAY – of Uranium (Ur), Thorium (Th) or Potassium (K) 3.VULCANISM 4.CONDUCTION Other planets have no tectonic activity because they have already cooled

9. Movements of Plates

10. Make a pattern of colored stripes with markers

11. TYPES OF PLATE BOUNDARIES Divergent Margins Convergent Margins Transform Margins Hot Spots

12. DIVERGENT BOUNDARIES Places where 2 (or more) plates are moving apart Most found on ocean floor As plates separate, narrow “rift” valley forms Ex.- Mid Atlantic Ridge, Red Sea, p 249

13. CONVERGENT BOUNDARIES Place where 2 (or more) plates move toward each other, collide Types 1 Oceanic-Continental crusts 2 Continental-Continental Crusts 3 Oceanic- Oceanic Crust

14. 1. Oceanic-Continental Crust Oceanic crust is more dense (basalt) It is forced under the continental crust (granite) Forms deep ocean trench, volcanic mountains Ex.- Peru Trench, Andes Mountains, Cascade Mtns

16. 2. Continental-Continental Crust Since both plates are of equal density, neither goes under (gets subducted) Plates crumple Form uplifted mountains Ex.- Himalayan Mtns.

18. 3. Oceanic-Oceanic Crust Bigger plate forces other under Deep ocean trenches form and volcanic island arcs Ex.- Marianas Trench, Aleutian Islands

20. TRANSFORM BOUNDARIES 2 or more plates slide past each other Plates do not slide smoothly-earthquakes Scrape and move in spurts Ex.- San Andreas Fault

22. HOT SPOTS Small, long lasting, extremely hot area in the middle of a plate Provides local source of energy for volcanism Plate continues to move, creating new island or feature above hot spot, geysers Ex.- Hawaii, Emperor Sea Mounts, Yellowstone N.P.

26. Geysers

27. Illustration of Main Boundaries

28. Why do plate move? Convection Currents

29. Natural Hazards Earthquakes Volcanoes Tsunamis

30. Natural Resources Fertile Soil Ore Deposits Fossil Fuels Geothermal Energy