Crests

(1) Narrow (several meters high) parallel topographical formations created in the floodplains of broad river valleys as a result of the displacement of the river channel to the side of one of the slopes.

(2) Gentle slopes rising in the southern Western Siberian plain, composed of Neocene and Anthropogenic sand-clay deposits. They extend in a primarily northeastern direction for 200 km. The predominant heights are 10–12 m (Baraba steppe, Ishim plain) to 100–160 m (Kulunda plain).