Wallachian Plain
The area surrounding the Black Sea is commonly referred to as the "Black Sea Region". Its northern part lies within the "Chernozem belt" (black soil belt) which goes from eastern Croatia (Slavonia), along the Danube (northern Serbia, northern Bulgaria (Danubian Plain) and southern Romania (Wallachian Plain)) to northeast Ukraine and further across the Central Black Earth Region and southern Russia into Siberia.