Hadrosaur Caudal (Tail) Vertebra | Judith River Formation | Montana Tooth The tail of the prey

The tail of the prey fish can be seen sticking out of the Mioplosus' mouth

6 ppm iridium

about 300 million years before dinosaurs

León Province

Whether they persisted until this catastrophic event or succumbed to earlier environmental shifts remains a subject of ongoing paleontological investigation

Hadrosaur Caudal (Tail) Vertebra | Judith River Formation | Montana Tooth The tail of the preyHadrosaur sp. Late Cretaceous (~74 MYO) Judith River Formation Montana, USA Specimen approx. size: 5" x 4. 75" x 2. 75 The vertebral fractures are a result of geologic processes, which have been remedied through the use of glue for stabilization. Hadrosaurs, often called "duck billed dinosaurs," are a family of ornithopod dinosaurs (family Hadrosauridae) that thrived during the Late Cretaceous period. They are among the most well known and successful