 The terrain in the source area of the river is rich in marble and fireclay.The river flows to the east, next to the Aranđelovac's suburb of Banja and turns north near Topola.After the villages of Krćevac and Zagorica, the Kubršnica receives from the left its major tributary, the "Veliki Lug", near the village of Ratari and enters the eastern half of the Veliko Pomoravlje as it turns to the east again.