Central Russian Uplands
The Central Russian Upland (also Central Upland and East European Upland) is an upland area of the East European Plain and is an undulating plateau with an average elevation of . Its highest peak is measured at . The southeastern portion of the upland known as the Kalach Upland. The Central Upland is built of Precambrian deposits of the crystalline Voronezh Massif. Location It spans approximately 180,000 miles² (480,000 km2) in central and southern European Russia northeast of Ukraine, extending from the Oka river to the Donets river. The upland stretches across number of regions in Ukraine and the European portion of Russian Federation. Its north and northwest borders are considered to be Oka River and an imaginary line Kaluga-Ryazan. To the southeast towards the Donets River, the upland changes into the Donets Lowland. To the east its natural border is defined by the Oka–Don Lowland and to the west there is the Dnieper Lowland. Most of the upland lies within the borders ...
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