Abstract
An average U-series age of 102,000 .+-. 14,000 yr for bones [bison, camel, mammoth] from Louviers Alluvium, near Denver, Colorado, is compatible with the inferred geologic age of from 120,000-150,000 yr. A U-series date of about 190,000 yr for a bone from Slocum Alluvium, near Canon City, Colorado, is consistent with the inferred geologic age of from 150,000-260,000 yr. Age determinations for the Broadway Alluvium are inconsistent but its geologic age is considered to be 15,000-30,000 yr B.P.

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