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The fossil vertebrate bearing locality Kossom Bougoudi (KB) is situated in the Djurab desert (Chad, Africa), 600km north-east of N’djamena. It has yielded about 1250 specimens with many mammalian remains, principally artiodactyls. Its geologic age has been estimated to be about 5 Ma by biochronologic estimation and about 5.3 Ma by radiometric studies on cosmogenic nuclides of beryllium (authigenic...
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