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How Continental Drift arranged the continents to how we know them today

How Continental Drift arranged the continents to how we know them today. Unit 4. Theory of Continental Drift. In 1912 Alfred Wegener proposed that a large super continent called Pangea split into smaller pieces about 200-300 million years ago.

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How Continental Drift arranged the continents to how we know them today

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  1. How Continental Drift arranged the continents to how we know them today Unit 4

  2. Theory of Continental Drift • In 1912 Alfred Wegener proposed that a large super continent called Pangea split into smaller pieces about 200-300 million years ago. • Alfred’s theory is supported by the ‘fit of the continents, distribution of rocks, fossils, soil, and ice.

  3. Causes of the drift • Sea-floor spreading, which can cause subduction zones. • Subduction zones are the areas where one piece of the crust moves under another. • Collisions and creations of the crust plates, these collisions usually cause earthquakes. • During an earthquake the epicenter ispoint on the earths surface directly above the focuswhich is where the earth quake starts.

  4. Evidence supporting the theory • The evidence supporting the theory of continental drift shows that if you look at the continents below sea-level you could piece them together like a puzzle. • The continents also have similar environments including the soil and rocks along the edges of where they touch when put together.

  5. Video • http://www.youtube.com/watch?v=NYbTNFN3NBo&feature=related

  6. K.S. • Who proposed the theory of Continental Drift?

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