How Are Volcanoes Related to Plate Tectonics?
ES0901  East Pacific Rise

This image shows the seafloor topography for a section of the East Pacific Ocean near South America. The ridge in the center of the image is known as the East Pacific Rise. Examine the image to visualize the subsurface geology indicated by the shape of the surface.

7. Sketch a cross section showing the subsurface geology you would expect to see along line A-B.

 

 
   

8. Where does the magma for these volcanoes come from?

 
   

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