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Previous studies have shown that Sr/Ca ratios were good indicators of trophic levels of human and faunal populations in a given geographical region. These studies have operated under the assumption that removal of debris and post-depositional matter from the bone by using a wash protocol will bring the Sr/Ca ratios to their original state. this study concludes that that is an erroneous assumption. Wildebeest samples collected at death and ten years later were analyzed for Sr/Ca ratios and the results were negative for the return of the tenth-year sample to the ratios of the first-year sample after washing. Andrew Sillen's recent Sr/Ca study is followed in this present study and his conclusions and assumptions are discussed.