Abstract
A Rb-Sr isotopic study of 5 glasses from the Bosumtwi crater in Ghana and of three Ivory Coast tektites was made. The Sr87/Sr86 ratios for the glasses lie between 0.716 and 0.734 and those for the tektites between 0.721 and 0.726. The ratios of Rb/Sr are between 0.196 and 0.328 for the crater glasses and between 0.197 and 0.287 for the tektites. The Ivory Coast tektites lie in a region of the Sr evolution diagram which is distinctly lower than for the other tektite groups 1. The Bosumtwi glasses define an approximately linear array on the Sr evolution diagram which contains the Ivory Coast tektite points. These results show that the IC tektites are distinctive from other tektite occurences and suggest that the glasses and the tektites may represent fusion products of similar material.
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