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Other than abundant matching fossils and sedimentary rock on opposite sides of the Atlantic Ocean and the apparent puzzle piece appearance of the continents on either side of the Atlantic, there is the presence of the mid-oceanic ridges, areas where new oceanic crust is created. The magnetic orientation of the basaltic oceanic crust as it forms is the mirror image of the magnetic orientation of the basaltic oceanic crust on the other side of the ridge, indicating that the seafloor is spreading in both directions away from ridge. Additionally, the dating of rock on the ocean floor has shown that oceanic crust and overlying sediment become progressively younger as the mid-ocean ridge is approached.

And finally, accurate measurements have been made by global positioning devices which verify that seafloor spreading is occurring.

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Q: Where is evidence found for sea-floor spreading?
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Related questions

What is the evidence of seafloor spreading?

Animal fossils have been found in many places in the ocean.


Is there evidence that seafloor-spreading?

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What do magnetic anomalies provide evidence of?

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Magnetic striping is evidence of?

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How are magnetic patterns in sea floor rock evidence of seafloor spreading?

Magnetic alignment of rocks, in alternating strips that run parallel to ridges, indicates reversals in Earth's magnetic field and provides further evidence of seafloor spreading.


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