Over 13,000 elements from a single bonebed help elucidate disarticulation and transport of an Edmontosaurus thanatocoenosis.
Over twenty years of work on the Hanson Ranch (HR) Bonebed in the Lance Formation of eastern Wyoming CR-33 has yielded over 13,000 individual elements primarily of the hadrosaurid dinosaur Edmontosaurus annectens.The fossil bones are found normally-graded within a fine-grained (claystone to siltstone) bed that varies from one to two meters in thick