Late Cretaceous dinosaurs from the Denver Basin, Colorado Author Kenneth Carpenter Department of Earth Sciences, Denver Museum of Nature & Science, 2001 Colorado Boulevard, Denver, CO 80205, U. S. A. Author D. Bruce Young Department of Earth Sciences, Denver Museum of Nature & Science, 2001 Colorado Boulevard, Denver, CO 80205, U. S. A. text Rocky Mountain Geology 2002 37 237 254 journal article 10.2113/gsrocky.37.2.237 41bd81a8-8d16-41cb-950f-8fab1660f845 3943081 Family HADROSAURIDAE The vast majority ofthe hadrosaur specimens from the Laramie and Denver Formations cannot be identified below family level. At least two genera, Edmontosaurus and Anatotitan , are known from the coeval Lance and Hell Creek Formations making it impossible to refer the mostly fragmentary specimens from the Denver Basin to either genus. An exception is a pair of maxillae, described below.