The Turgay Plateau (Тургайское плато) is a plateau in northwest Kazhakstan, central Asia. It lies 200-300 m above sea level. It extends some 630 km north-south and 300 km east-west. It is bisected by the Turgay Ravine which is 800 km long and during the last ice age provided an outlet for the extinct West Siberian Glacial Lake. Betw...