Dolomites grading into magnesian limestones and limestones are widely distributed throughout South. Australia. They form thin beds in the Cleve Metamorphics on Eyre Peninsula; they are common in the Adelaidean and Lower Cambrian of the Flinders Ranges, Mount Lofty Ranges and Yorke Peninsula; Tertiary deposits outcrop in the South East while Cainozoic lacustrine deposits are widespread (Johns, 1963). Most of the locals output is utilised as a fettling material in, the steel industry and for manufacture of plate glass.The current production exceeds 300 000 tonnes, valued at over $570 000, per year.