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Plate Tectonics Plate Boundaries and Interactions.

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Presentation on theme: "Plate Tectonics Plate Boundaries and Interactions."— Presentation transcript:

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2 Plate Tectonics Plate Boundaries and Interactions

3 The Theory of Plate Tectonics  The Earth’s surface is divided into plates that move and interact with one another.

4 Overview of Plate Boundary Interactions

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6 Divergent Plate Boundaries Plates are moving apart. New crust and lithosphere is “created” Associated with ocean ridges, rift valleys, volcanism, earthquakes and high heat flow.

7 Examples found on Earth: Mid-Atlantic Ridge, African Rift Valley, Iceland

8 Plates are moving towards each other. Old crust and lithosphere is “recycled”. Associated with ocean trenches, island arcs and mountain ranges. Earthquakes and volcanism are common. Convergent Plate Boundaries

9 Examples found on Earth: Himalayas, Pacific Ring of Fire, Andes Mountains, Marianas Trench

10 Plates slide past each other, oftentimes connecting two ridges or trenches. Crust is deformed or fractured; Lithosphere is neither created nor recycled. Long faults and earthquakes common. Examples found on Earth: San Andreas Fault Transform Plate Boundaries

11 Plate Boundaries, Earthquakes and Volcanic Activity

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