SeaFloor Spreading

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Sea-Floor Spreading
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Essential Question

• How does plate movement occur?

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Mid-ocean ridge

• The undersea mountain chain where new ocean floor
  is produced

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Seafloor Spreading

• Process that adds new material to the ocean floor

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Evidence for sea-floor spreading
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• Molten material- pillow lava
• Magnetic stripes
• Drilling samples

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Pillow Lava