Scientists explain their education as a consequence of the movement of the waves of the ancient sea, which was once in the territory of the West Siberian lowland, and also by the natural process of weathering.
Ososayensi bachaza imfundo yabo ngenxa yokuhamba kwamagagasi olwandle lasendulo, okwakutholakala eNtshonalanga yeSiberia yaseNtshonalanga, futhi nangenqubo yemvelo yezulu.