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Notes on Plate Boundaries

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


The diagram above shows what occurs at a divergent boundary.  Notice the magma explodes from the mantle (volcanic activity).  This pushes the plates apart.  We end up with a mid-ocean ridge with a rift valley between the ridges.  New ocean floor is formed at the bottom of the rift valley.  The oldest rock is farthest from the center.