The differentiation of the magma entering the eruption site of Geldingadalir in Iceland tells a story. The magma did become more primitive quite rapidly as this graph shows:
This tells us that the lava ascending at first to the surface must have had time for differentiation, whereas what follows has not been altered in the same way. This makes sense if the magma did flow some distance horizontally before entering the dike and eventually the eruption site. This is one argument for speculating about the existence of another, lower dike, being aligned perpendicularly to the upper dike.
The eruption is developing stepwise, and now higher fountains of lava are measured to have reached over 200 meters hight.
The eruption of Geldingadalir on the Reykjanes Peninsula in Iceland – May 2nd 2021.
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 