Continental Drift Theory Template

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Continental Drift Theory Template

  1. 1. Continental Drift Theory Derek Marsh
  2. 2. Alfred Wegener <ul><li>He was born Nov. 1, 1880 in Berlin Germany </li></ul><ul><li>He most noted for the Continental drift theory. </li></ul><ul><li>Scientists rejected his theory until 1950 after his death when numerous things started showing up. </li></ul><ul><li>He was early trained in Astronomy. </li></ul><ul><li>He got a PhD in Astronomy. </li></ul>
  3. 3. Continental Drift Theory <ul><li>The movement of the Earth’s continents in relation to each other. </li></ul>
  4. 4. Continental Drift Theory Evidence <ul><li>Land forms: He noticed that a mountain range in India matched up with a mountain in Argentina. </li></ul><ul><li>Fossils: Fossils of the reptiles Mesosaurus, and Lystrosaurus have been found in places now separated by oceans </li></ul><ul><li>Climate:The island of spitsbergen is found in the Arctic ocean and it is na ice island so he thought it should be closer to one of the poles </li></ul>
  5. 5. Harry Hess <ul><li>One of the founders of unifying plate tectonics. </li></ul><ul><li>Born May 24, 1906 in New York city. </li></ul><ul><li>Best known for theories on seafloor spreading. </li></ul><ul><li>He went to Yale as an electrical engineering major. </li></ul><ul><li>After 2 years he switched to Geology. </li></ul>
  6. 6. Sea Floor Spreading <ul><li>The process by which molten material adds new oceanic crust to the ocean floor. </li></ul>
  7. 7. Sea Floor Spreading Evidence <ul><li>Molten material: New material is erupting from the mid ocean ridge which spreads them farther apart. </li></ul><ul><li>Magnetic Stripes: Every otther stripe is reversed from the prevous one because the poles reverse and then go back to normal, after 780,000. </li></ul><ul><li>Drilling samples: The found the farther away from the ridge the older the rocks. were. </li></ul>
  8. 8. Other Definitions <ul><li>Subduction- the process by which oceanic crust sinks beneath a deep ocean trench and back into the mantle at a convergent plate boundary. </li></ul><ul><li>Mid-Ocean Ridge- the undersea mountain chain where new ocean floor is produced. </li></ul><ul><li>Sonar-a device that determines the distance of an object under the water the water by sonar. </li></ul>

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