The Electricity Trust of South Australia requires a source of high grade limestone or dolomite to be used in the planned industrial firing process for brown coal from the Wakefield coal deposit. A SADME survey of available literature, supplemented by reconnaissance sampling, has established that the Kulpara Limestone, a buff to light grey dolomite of Cambrian age, will meet the necessary chemical specifications. Three potential quarry sites, each capable of yielding the required 20 million tonnes, have been determined, two in the South Hummock Range and the third north-west of Melton on northern Yorke Peninsula. The site near Melton is preferred. Material suitable for a trial combustion sample is available from the screenings stockpile at a quarry operated by the Highways Department on Section 360, Hundred of Kulpara. It is recommended that ETSA apply for an Exploration Licence over the Melton area to secure mineral tenure to Site 3 while the trial sample is being tested. Further work in the form of detailed mapping and diamond drilling is required to prove reserves and quality of dolomite available for mining.