Deep Proterozoic Crust in the North Atlantic Provinces

The Proterozoic terrains of South Scandinavia and the Grenville Province in North-America have many common features : Regional high­ grade metamorphism (Granulite-facies), anorthosites, etc. They are separated by the Caledonian orogeny and, above all, by the Atlantic Ocean. During the time of the great continental drift controversy, few people were ready to admit that both sides on the Atlantic we...