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PLATE TECTONICS

PLATE TECTONICS. The Theory. In 1910 Alfred Wegener begins to wonder…. What’s the relationship? Perhaps all these pieces used to be connected. Continental drift= slow movement over Earth’s surface It all started 300 million years ago………. Supercontinent. Pangea –(Greek) all lands.

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PLATE TECTONICS

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  1. PLATE TECTONICS

  2. The Theory In 1910 Alfred Wegener begins to wonder…. What’s the relationship? Perhaps all these pieces used to be connected. Continental drift=slow movement over Earth’s surface It all started 300 million years ago………..

  3. Supercontinent • Pangea –(Greek) all lands Tens of Millions of years!

  4. plates are moving apart • new crust is created • Magma is coming to the surface • plates are comingtogether • crust is returning to the mantle • plates are slipping past each other • crust is not created or destroyed

  5. 2 oceanic plates or oceanic + continental subduction

  6. The Big Picture

  7. Homework- Vocabulary convergent boundary divergent boundary transform boundary subduction mid-ocean ridge continental crust oceanic crust mountain range earthquake

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