Even though lakes farther north (Lakes Gregory, Blanche and Callabonna)received water from Strzelecki Creek at that time (De Deckker et al.,2011) which at least partly overtopped the Salt Creek sill (Fig. 1c),water held in Lake Frome in 1974 mostly resulted from a combination of runoff from the Flinders Ranges and groundwater discharge (Cohen et al., 2011; Nanson et al., 1998).