Alluvial flats and alluvial terraces have formed in the wide valley floors at the base of the rolling hills. The wide floodplain of the Barwon River from Gerangamete to Birregurra has developed in response to the changes in base levels associated with the periodic damming of the river by Newer Volcanic basalt flows around Winchelsea and the fluctuating sea levels of the Quaternary. |
Soil-landform unit | Original unit ID | Unit description | Area (km2) |
Carlisle L.S. | Elevated dissected terraces (Gellibrand River) | 25 | |
Barwon River L.S. | Floodplain (Barwon River and tributaries) | 57 | |
Gellibrand River L.S. | Floodplain (Gellibrand, Aire and Barham rivers) | 42 | |
Point Roadknight L.S. | Longitudinal coastal dunes | 7 |