The state's land is characterised by tablelands. Almost 90 per cent of the state's region consists a tableland with an average height of 300 m to 450 m. The southwest, northwest and Kimberly regions contain many rivers flowing to the sea, including the Fitzroy, Fortescue and Ashburton rivers. The Pilbara and Hamersley Range in the northeast are particularly rich in mineral
If you go further inland the arid plateau slowly transforms into desert. Large numbers of salt lakes in the southwest are believed to be the remnants of ancient river systems. The salt lakes, bordering the wheat belt and the jarrrah forests of the extreme southwest, contain precious gold-bearing rocks around Kalgoorlie. To the southwest is the limestone Nullarbor Plain which extends into South Australia.
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