The Danubian Plain constitutes the northern part of Bulgaria, situated north of the Balkan Mountains and south of the Danube. Its western border is the Timok River, and to the east it borders the Black Sea. The plain has an area of 31523 km2. It is about 500 km long and 20 to 120 km wide. The Danubian Plain is contiguous with the Wallachian Plain (forming the Lower Danubian Plain), but its elevation is slightly higher and the relief is more hilly and rolling, featuring numerous plateaux and river valleys. The climate is markedly temperate continental with a weak Black Sea influence in the east. Precipitation is on average 450–650 mm a year. Important rivers include the Danube, the Iskar, the Yantra, the Osam, the Vit, the Rusenski Lom, the Ogosta, and the Lom. Among the major cities of the region are Varna, Rousse, Pleven, Dobrich, Shumen, Veliko Tarnovo, Vratsa, Vidin, Montana, Silistra, Targovishte, Razgrad, Svishtov and Lom.

Minerals

The Danubian Plain contains a wide variety of minerals, such as: