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Previous dating studies have focused on 14C dating of carbon-bearing mud, gastropod shells and water plants and the results show a large amount of scatter for different heights above the lake. This scatter can be partly explained by the mix of extraneous detrital carbonaceous material in the mud and plant material. Measurements of water from restricted basins and the open lake show significant differences in 14C/12C ratios, and samples formed in equilibrium with restricted basins will have a different reservoir effect to those formed in equilibrium with the main body of the Lake. Sampling of tufa deposited from lake water is largely unaffected by detrital material and is potentially a good material to estimate the age of shorelines. However, tufa may also form much later than the lake shoreline at some depth in the sedimentary pile and may be formed in equilibrium with water containing old C. These problems can be minimized by using samples that are attached firmly to rock substrate and in regions where the overall dip of the shoreline is steep and formation of restricted lagoons is unlikely. Preliminary results using this sampling strategy give an age of around 6,000 years ago for a height of 11m. This is in very good agreement with two OSL dates for shorelines and the associate heights reported in the literature. 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