About: Kattsund-Koster dyke swarm     Goto   Sponge   NotDistinct   Permalink

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The Kattsund-Koster dyke swarm is a collection of dykes of Mesoproterozoic age in southeastern Norway and the West Coast of Sweden. The most prominent outcrops are in the Koster Islands in Sweden and Kattsund in Norway, hence the name. The dykes are made up of tholeiitic diabase and some dykes of intermediate composition. Some dykes are deformed and metamorphosed into amphibolite. Radiometric dating has shown that the dyke swarm is about 1421 million years old. Geologists have suggested that the dyke swarm is related to extensional tectonics.

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  • Kattsund-Koster dyke swarm (en)
  • Sciame di dicchi Kattsund-Koster (it)
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  • The Kattsund-Koster dyke swarm is a collection of dykes of Mesoproterozoic age in southeastern Norway and the West Coast of Sweden. The most prominent outcrops are in the Koster Islands in Sweden and Kattsund in Norway, hence the name. The dykes are made up of tholeiitic diabase and some dykes of intermediate composition. Some dykes are deformed and metamorphosed into amphibolite. Radiometric dating has shown that the dyke swarm is about 1421 million years old. Geologists have suggested that the dyke swarm is related to extensional tectonics. (en)
  • Lo sciame di dicchi Kattsund-Koster, è uno sciame di dicchi risalenti al Mesoproterozoico che si trovano nella parte sudorientale della Norvegia e nella costa occidentale della Svezia. La denominazione è collegata al fatto che gli affioramenti più consistenti sono nelle della Svezia e Kattsund della Norvegia. I dicchi sono prevalentemente costituiti da diabase di basalto tholeiitico, anche se alcuni hanno una composizione intermedia tra rocce felsiche e mafiche. Alcuni dicchi sono deformati e metamorfizzati in anfibolite. (it)
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  • The Kattsund-Koster dyke swarm is a collection of dykes of Mesoproterozoic age in southeastern Norway and the West Coast of Sweden. The most prominent outcrops are in the Koster Islands in Sweden and Kattsund in Norway, hence the name. The dykes are made up of tholeiitic diabase and some dykes of intermediate composition. Some dykes are deformed and metamorphosed into amphibolite. Radiometric dating has shown that the dyke swarm is about 1421 million years old. Geologists have suggested that the dyke swarm is related to extensional tectonics. (en)
  • Lo sciame di dicchi Kattsund-Koster, è uno sciame di dicchi risalenti al Mesoproterozoico che si trovano nella parte sudorientale della Norvegia e nella costa occidentale della Svezia. La denominazione è collegata al fatto che gli affioramenti più consistenti sono nelle della Svezia e Kattsund della Norvegia. I dicchi sono prevalentemente costituiti da diabase di basalto tholeiitico, anche se alcuni hanno una composizione intermedia tra rocce felsiche e mafiche. Alcuni dicchi sono deformati e metamorfizzati in anfibolite. La datazione radiometrica mostra che lo sciame di dicchi ha un'età di circa 1421 milioni di anni. I geologi ritengono che lo sciame sia collegato a una fase tettonica distensiva. (it)
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