Under the Atlantic, a pair of convection currents has moved the continents to the East and West. The details of that pair of currents have been analyzed here, but for public introduction, first a simplified section along equator is presented:
The mantle convection currents under the Atlantic Ocean (not to scale)
The seafloor has some 3D effect, just to remind us that when we draw sections of geological features, it is to help us understanding the whole picture.
As pointed out on the drawing, upwelling takes place in the middle. Also, the distance between the continents at equator is exactly 60°, and a convection cell section spans exactly 30° from east to west.
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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