Central Yakutian Lowland,the alluvial plain of the middleLena Riverseparating the Central Siberian Plateau to the west and the East Siberian Mountains to the east. Area 300,000 km2(120,000 sq mi).[3]
East European Plain,a very large area that comprises the plains and depressions west and southwest of the Urals crossed by numerous large rivers, such as theVolga,Dnieper,DonandPechora.Area approximately 4,000,000 km2(1,500,000 sq mi).[2]
West Siberian Plain,large alluvial plain between theUralsto the west and theYenisei Riverto the east, beyond which rises the Central Siberian Plateau. The lowland is bound by the coast of theKara Seato the north and by the foothills of theAltai Mountainsto the southeast. The southern end extends intoKazakhstan.Area 2,600,000 km2(1,000,000 sq mi).[8]
^А.Г. Исаченко. Ландшафтоведение и физико-географическое районирование. — Москва: Высшая школа, 1991. —ISBN5-06-001731-1(A.G. Isachenko,Landscape Science and Physiogeographical Zoning.)
^abА. Д. Некипелов и др. Новая Российская Энциклопедия, т. 1. (A. D. Nekipelov et al.New Russian Encyclopedia,vol. 1) — М.: Энциклопедия, 2003. — 969 с. —ISBN5-94802-003-7.