La bordure est du Bassin précaspien et le bassin d'avant-pays de l'Oural (Kazakhstan) au Carbonifère et Permien inférieur

Stratigraphic correlations are proposed after micropaleontology (fusulinids), sismic reflexions, well logging and sedimentology. The eastern border of the Precaspian Basin exhibits during the Carboniferous, an eastern carbonated platform and a western turbiditic basin interrupted by a horst and during the lower Permian a turbiditic basin interrupted by a horst. The Preuralian Basin located eastwards shows a turbiditic basin during the Carboniferous and the lower Permian. A shifting of the depocenters is observed from the Preuralian Basin to the Precaspian Basin between the Carboniferous and the lower Permian during the western progress of the nappe structures.