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Name 2 pieces of evidence about sea-floor spreading.
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Name 2 pieces of evidence about sea-floor spreading.

User Harpan
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Eruptions of molten material and magnetic strips in the rock of the ocean floor.
User Lev Khruschev
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rocks near mid-ocean ridge are younger than rocks near trenches and earth quake data shows ocean crust is sinking on to the mantle at trenches

User Uomo
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