Exploration undertaken in an area of practically no outcrop that is situated south of the Ediacara Range, on the eastern side of Lake Torrens, has aimed primarily at investigating the Viburnum Trend (Mississippi Valley) - type mineral potential of Adelaidean and Cambrian carbonate metasediments occurring near the Ediacara Fault in the saddle area between two large, low amplitude aeromagnetic highs that were interpreted to represent a possible mineralised basement high structure existing at depth. A secondary objective was to determine the potential for economic sodium carbonate evaporite mineralisation within Miocene lacustrine strata deposited along the eastern margin of the Tertiary Pirie-Torrens Basin. Field work consisted of the examination of outcrops of the Wonoka Formation limestones, and limited stream sediment sampling (11 samples) and rock chip sampling (33 samples) taken mainly from barite-quartz veined fault breccias formed adjacent to the major fault zone. A lack of well-developed secondary porosity, primary vugs or dolomitisation within the Wonoka downgraded its potential to host MVT mineralisation, but the prospectivity of the Cambrian limestones remains encouraging. During early 1979 two vertical rotary mud stratigraphic holes totalling 622.9 m of penetration were drilled and geophysically logged at sites spaced 1 km apart to test the evaporite mineral potential of the Tertiary sedimentary sequence near Point Dam. Detailed geological logging suggested that the Miocene sediments might hold reasonable potential for hosting Green River - type sodium carbonate (trona) mineralisation. However, subsequent petrological examination and detailed XRD analysis of the drill cuttings samples failed to find any mineralogical evidence of significant traces of trona or other potentially economic evaporite minerals.