Researchers have discovered a cache of 100 million-year-old dinosaur tracks and other fossils embedded in the foothills of an Alaskan mountain range.
"This place was just crazy rich with dinosaur footprints," lead author Anthony Fiorillo, executive director of the New Mexico Museum of Natural History and Science, said in the statement.Fiorillo and his colleagues discovered the site was a preserved ancient landscape, with fossils of 2-foot-wide tree stumps, leaves, tracks and feces.Sign up for the Live Science daily newsletter nowGet the world’s most fascinating discoveries delivered straight to your inbox.
A majority of the tracks were left by two-legged herbivorous dinosaurs, collectively called bipedal ornithischians. This group includes animals such as helmet-headed pachycephalosaurs, which were not identified in the study. Four-legged plant eaters, or quadrupedal ornithischians, made up 17% of the tracks. Some of those belonged to ceratopsians, a group that includes the three-horned Triceratops.
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