along the line Bratislava – Senec – Sereď – Nové Zámky – Patince.
The area has varied rocks (clay, gravel, sands), which are covered by Quaternary sediments (loess) and very fertile soils (black and brown earths).
Major towns of the area are Trnava, Topoľčany, Nitra, Levice, Dudince and Štúrovo.
The Váh, Nitra, Žitava, Hron and Ipeľ rivers divide the area into the following 11 geomorphological parts (from the west to the east): The above-mentioned river plains have rich subterranean reservoirs of water.
Also, protected residues or original thermopile oak groves (Dubník, Vŕšok) are situated here.