
Geology Year: 1989 , Volume: 17 Issue: 9 Pages: 861-864
Illustrations: illus., 1 table, sketch map
Included maps: coprolites
Georef Keywords: Colorado Plateau; geochronology; Quaternary; Utah; Colorado; Arizona; New Mexico; absolute age; dates; organic materials; mammals; biogeography; United States; North America; Western U.S.; southeastern Utah; western Colorado;Southwestern U.S.; northeastern Arizona; northwestern New Mexico; Mammuthus; Elephantidae; Elephantoidea; Proboscidea; Eutheria; Theria; Mammalia; C 14; isotopes; radioactive isotopes; carbon; uranium disequilibrium; bones; tusks;