The Lower Carboniferous coal deposits of the eastern slope of the Urals are a recognized standard of coal-bearing formation of geosynclinal type. This is also reflected in the genetic classification of coal-bearing sediments proposed by E.O. Pogrebitsky. There is an obvious necessity of detailed study of this, still poorly investigated, coal-bearing formation for a possible more accurate determination of its classification features. ...

The stratigraphy of Carboniferous eugeosynclinal coal-bearing deposits of the eastern slope of the Urals, despite more than a century and a half of research, remains poorly studied. For the majority of deposits several stratigraphic schemes have been proposed, differently determining the age of the coal-bearing strata - from Turnean to Visean and even Middle Carboniferous.