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Then the Superior Craton reversed its direction and the ocean basin began to close. A subduction zone formed as the oceanic crust of the Superior Craton was subducted beneath the Hearne and Wyoming Cratons with the Sask Craton in the middle. Volcanic arcs developed as the cratons collided, eventually resulting in the THO mountain-building ...
Also called the Wyoming Province, it is the initial core of the continental crust of North America. The Wyoming Craton was sutured together with the Superior and Hearne-Rae cratons in the mountain-building episode that created the Trans-Hudson Suture Zone to form the core of North America . It was incorporated into southwest Laurentia ...
East European Craton, the core of Baltica. Volgo-Uralian Craton, Russia (3.0–2.7 Ga) Baltic Shield, part of the East European Craton; Fennoscandian Shield, the exposed Northwestern part of the Baltic Shield in Norway, Sweden and Finland (3.1 Ga) Karelian Craton, part of the Fennoscandian Shield in Southeast Finland and Karelia Russia, (3.4 Ga)
The geological fault zone resulting from the continental collision is known as the Iapetus Suture, named after the ocean it replaced. The closure of Iapetus involved a complex and protracted collisional history of numerous continental fragments , volcanic arcs and back-arc basins that were accreted to Laurentia and Avalonia between the Early ...
The Akitkan Orogen forms a suture between the Anabar Shield to the northwest and the Aldan Shield to the southeast. [ 8 ] [ 9 ] It is a feature of the Siberian Craton known only from geophysical data along most of its extent because it is covered by younger rocks.
There is continuing controversy over whether the region is a shear zone or suture, [1] [9] and the role the zone played in the formation of the North American continent. [2] At one time, both the Great Falls Tectonic Zone and the Vulcan structure were both considered sutures, but debate remains open on the point. [ 2 ]
Baltica is a paleocontinent that formed in the Paleoproterozoic and now constitutes northwestern Eurasia, or Europe north of the Trans-European Suture Zone and west of the Ural Mountains. The thick core of Baltica, the East European Craton, is more than three billion years old and formed part of the Rodinia supercontinent at c. 1 Ga. [1]
The zone runs from the North Sea to the Black Sea. The north-western part of the zone was created by the collision of Avalonia and Baltica/East European Craton in the Late Ordovician. The south-eastern part of the zone, now largely concealed by deep sedimentary basins, developed through Variscan and Alpine orogenic events.