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Precambrian ukrainian shield soroky greenstone belt
In geology the Ukrainian Shield (or Ukrainian Crystalline Massif) is the southwest shield of the East European craton. The Ukrainian Shield and the Voronezh Massif consist of 3.2-3.8 Ga Archaean crust in the southwest and east, and 2.3-2.1 Ga Early Proterozoic orogenic belts. Ukrainian shield is approx. 1000 km long and up to 250 km wide.
References
Ukrainian Shield Wikipedia(Text) CC BY-SA