 The Ural Mountains are the eastern margin of the East European Craton and mark the Late Paleozoic orogenic collision of the East European Craton with the Siberian cratons.The southern margin of the craton is where Sarmatia is buried beneath thick Phanerozoic sediments and the Alpine orogens.The intervening Late Palaeozoic Donbass Fold Belt, also known as part of the Dnieper-Donets Rift, transects Sarmatia, dividing it into the Ukrainian Shield and the Voronezh Massif.