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File:Ocean-birth hg.png

Description The genesis of an ocean: In plate tectonics, the formation of an ocean starts with a rifting process in the crust as a result of mantle convection. An example of this is the African Rift Valley. In the next stage, the valley has opened up until sea water enters; a good example is the Red Sea. The spreading process continues, the ocean becomes wider and forms a mature ocean like the Atlantic.
Date 20 June 2007
Source Own work
Author Hannes Grobe, Alfred Wegener Institute for Polar and Marine Research
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