A substratum survey of the earth in Sweden and Norway has shown how dissimilar the two countries are.
“We have much more in common with Denmark than Sweden in this particular area,” says researcher Jörg Ebbing at Norwegian government agency NGU about Southern Norway.
The expert states that one of the more remarkable results found during the survey is the difference in the upper mantle part under Southern Norway and the mantle under Sweden.
The mantle appears to be thinner and warmer, and younger than the on the Swedish side of the border, and is more akin to that in Denmark.
Mr Ebbing believes that the differences in lithosphere between Sweden and Norway could explain things like the sharp profile of Norwegian mountains.
“We know that the transition between the stable Baltic Shield and the remains of the mountain range is strongly influenced by the lithosphere’s structure. The softer mantel rocks to the east are older and less affected by the Caledonian orogeny (a mountain building era).”
Research will continue over the next couple of years by surveying the areas covering Trøndelag to Finnmark counties.
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