Hadrosaurid migration: inferences based on stable isotope comparisons among Late Cretaceous dinosaur localities

摘要: Abstract Stable carbon and oxygen isotope ratios were measured for carbonate in samples of hadrosaurid tooth enamel dentine, gar scale ganoine dentine from five geologically “contemporaneous” (two-million-year resolution) geographically distant late Campanian formations (Two Medicine, Dinosaur Park, Judith River, Kaiparowits, Fruitland) the Western Interior Basin. In all cases, isotopic offsets observed between same teeth, with being characterized by higher more variable ratios. Isotopic also hadrosaur sites analyzed. Both these observations indicate that diagenetic overprinting did not entirely obfuscate primary signals. Decreases east to west, overlap occurred only two sampled (Dinosaur Park River ...