<P> Kati Thanda -- Lake Eyre is located in the deserts of central Australia , in northern South Australia . The Lake Eyre Basin is a large endorheic system surrounding the lakebed , the lowest part of which is filled with the characteristic salt pan caused by the seasonal expansion and subsequent evaporation of the trapped waters . Even in the dry season there is usually some water remaining in Kati Thanda -- Lake Eyre , normally collecting in over 200 smaller sub-lakes within its margins . The lake was formed by aeolian processes after tectonic upwarping occurred to the south subsequent to the end of the Pleistocene epoch . </P>
where does the salt in lake eyre come from
the seasonal expansion and subsequent evaporation of the trapped waters