By showing the polygons mostly includen, the two volcanic zones of the south, can be marked clearly, and the north volcanic zone becomes tracable as well. The two zones of Snæfellsnes and Öræfajökull clearly span over relevant polygons.
I have a BS degree in geology, BA in anthropology, graduated in Chinese language and as a certified tourist guide. I provide this website about my contribution to answer the greatest question remaining about our Earth. I have analyzed the convection rolls within the Earth's mantle and how they affect the surface. This makes it possible to provide many interesting examples about geology found on my blog.
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Magic Magma 