A helicopter-assisted gravity survey was conducted between the south-western margin of the Great Artesian Basin and the eastern Officer Basin on a 4 mile by 4 mile grid (1 station per 16 square miles) between the 21st of May and the 8th of July 1968. The results outlined a general easterly to north easterly trend in the western portion of the area, abutting a general northerly trend to the east of the area at the Basin margin. A number of anomalies were outlined by the survey; the positive ones are thought to be associated with near surface crystalline basement and the negative anomalies are assumed to be associated with Palaeozoic sedimentary basins.