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What happens to the gulf due to the post -glacial land uplift ?
It´s going to first split into two (the top half will become a lake) and eventually the bottom half will be cut off from the Baltic, too, and then finally the two lakes will dry up/drain. All this in a couple of thousand years, a blink of an eye in geological time.
So rapid is the rate that lots of fishing towns are now far inland. My mum went to uni in a city called Vaasa/Vasa. Her favourite beach when she was a student is now a wooded area. She´s in her sixties.
https://en.wikipedia.org/wiki/Kvarken
https://www.maanmittauslaitos.fi/en/research/interesting-topics/land-uplift
https://www.vaasa.fi/en/living/freetime/naturevaasa/nature/land-uplift/
Yeah for some reason the English-speaking world in particular often gets this wrong. Scandinavians are those who speak Germanic languages that descend from Norse. Finns, although Nordic, speak a Finno-Ugric language. Confusingly, the peninsula on which all these peoples live is called Fennoscandia. There is a gulf that splits Scandinavia and Finland but not much longer because of a very rapid rate of post-glacial land uplift. Another thing that adds to the confusion is that Finland is bilingual (Finnish, Swedish) because the Swedes were kind enough to look after us for half a millenium before losing the province to Russia in a war in the early 19th century.