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Major Geological Events Caused by Plate Tectonics.

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Presentation on theme: "Major Geological Events Caused by Plate Tectonics."— Presentation transcript:

1 Major Geological Events Caused by Plate Tectonics

2 Types of Boundaries Divergent   ― Plates move apart Convergent  ― Plates come together Transform ― Plates slide horizontally past each other

3 Divergent Structures New crust is formed as plates pull apart. Land features include: ― Mid-Ocean Ridges Ex. - Mid-Atlantic Ridge ― Rift Valleys Ex. - African Rift Valley ― Earthquakes

4 Mid–Ocean Ridge (Location of Sea Floor Spreading)

5 Sea Floor Spreading (Mid-Ocean Ridge) Older Younger Divergent Structure

6 Rift Valley Divergent Structure

7 Convergent Boundaries Crust is destroyed and recycled back into the mantle Three types of convergent collisions Features include: ― Trenches – Mariana Trench ― Volcanic Arc (Volcanic Mountains) – Andes mountains ― Mountain Ranges – Himalayan Mountains ― Earthquakes

8 Subduction Result of convergent boundary A more dense plate slides under a less dense plate and sinks into the mantle. Features include: ― Oceanic-Oceanic = Trenches ― Oceanic-Continental = Mountain Ranges

9 Subduction Examples

10 Convergent Boundary Oceanic-Oceanic Land Features – Trench and Island Arc Oceanic-Oceanic convergence

11 Convergent Boundary Oceanic-Continental Land Features – Trench and Volcanic Arc (Volcanic Mountains) Oceanic-Continental convergence

12 Convergent Boundary Continental-Continental Land Features – Folded Mountains Continental-Continental convergence

13 Mountain Ranges

14 Transform Fault Structures Crust is neither destroyed nor created Can occur between two oceanic plates or oceanic-continental plates Features include: ― Earthquakes ― Fault line – San Andreas Fault

15 Transform Boundary Oceanic-Oceanic Land Feature – Fault Line

16 Transform Boundary San Andreas Fault Line

17 Transform Boundary Continental-Continental Land Features – Fault Line

18 Earthquakes – All Boundaries

19 Volcanoes

20 Putting It All Together

21 Plate Boundaries

22 Plate Movement

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