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Sea Floor Spreading

Sea Floor Spreading. Divergent Plate Boundaries. What is sea floor spreading?. Sea Floor Spreading is the formation of new crust from magma coming to the surface at a divergent plate boundary . As the plates continues to move apart the new crust is separated equally on both sides .

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Sea Floor Spreading

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  1. Sea Floor Spreading Divergent Plate Boundaries

  2. What is sea floor spreading? • Sea Floor Spreading is the formation of new crust from magma coming to the surface at a divergent plate boundary. • As the plates continues to move apart the new crust is separated equally on both sides.

  3. How do we know this? • http://www.youtube.com/watch?v=WhiF6IqGACo

  4. How do we know this? • Magnetic Reversal: When the magnetic field reverses. • Rocks on both sides of fault contain the same magnetic signatures. • Scientists also dated rocks from both sides and found that the youngest rocks were near the fault.

  5. What is a mid-ocean ridge? A Mid Ocean Ridge is an underwater mountain range made from new lava cooling at a divergent plate boundary.

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