Dalslandian orogeny

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An eastward continuation of the Proterozoic Grenvillian phase of mountain building that affected what are now southern Sweden and southern Norway. It occurred about 1050–1100 Ma ago and may have been caused by subduction along the north-western margin of the Iapetus Ocean, by the closing of an earlier ocean, or by rifting (see rift) that ended before producing significant sea-floor spreading.

Subjects: Earth Sciences and Geography.

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