Tectonic Plates

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Tectonic Plates

• Review the Layers
• Alfred Wengers Pangaea
• Sea Floor Spreading
• Magnetic Reversal

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The Earth has Layers
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Alfred Wegener 1880 - 1930

• Continental Drift Theory 1913
• Theory had few believers
• Continental drift became Plate
• Tectonics in the 1970s

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OKbut wheres your evidence??

• Fossils on two separate coasts
• Similar climate conditions
• Glacier cuts

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Pangaea

• Pangaeaall Earth
• Panthalassaall sea

180 million years ago
245 million years ago
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Gon-da-wan-na-who?!

• Laurasia
• Gondwana
• But whats a strong enough force to move
  continents??

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Dr. Evil?
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Chuck Norris?
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Mr. Kotsch?
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The Secret Sea Floor Spreading
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Plates on the move
Directions of Plates Now
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Mid-Ocean Ridges
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Earths Magnetic Field
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Magnetic Stripes
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Slab Pull-Push
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Boundaries
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Boundaries cont.
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Faults
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Normal Fault
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Normal Fault cont.
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Reverse Fault
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Reverse Fault cont.
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Strike-Slip Fault
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Strike-slip cont.
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Folds
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Anticline and Syncline