The Reykjanes Ridge is mainly shaped by the equatorial system of convection rolls, but the direction shifts when the polar convection rolls system takes over within the transition zone at the latitudes where Icealnd is located.
Reykjanes Ridge Convection Rolls and Connection With Polar Convection Rolls
It must be remembered, that the main division line is actually 1.5° farther to the East, where the division between large lower mantle convection rolls is found.
I am a geologist, graduated from the University of Iceland, and taught geology for a few years. I have gained some knowledge about Earth's inner structure, so I provide this website as my contribution to answer one of the greatest questions remaining within the realm of geoscience. Experiments show that the mantle should form convection rolls when close to the melting point. I took this literally, and calculated the dimensions and shape of these mantle convection rolls. Then I compare that model with the surface. This makes it possible to provide many interesting examples about geology found on my blog.
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