Many have noticed that the continents look somewhat similar, but it is difficult to say what. The northern part tends to be wider than the southern part. Comparing with the divisions found within the convection rolls model, a basic shape of North America be pointed out.
Basic Shape of North America.
The coast of the Pacific Ocean is obviously more regular than the East Coast. The continent all the same follows this basic shape surprisingly well. This shape resembles the southern part of Africa as shown in another post.
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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Magic Magma 