4.4" Fossil Dinosaur Ulna Bone - Hell Creek Formation, Montana

Fossil Dinosaur Ulna Bone - Hell Creek Formation, Montana #184633

This is a nicely preserved, 4.4" long ulna (distal arm bone) of an unidentified dinosaur from the Hell Creek Formation of Dawson County, Montana. The bone was found in two pieces, requiring gap fill restoration through through the diaphysis. The proximal epiphysis also required some restoration where the bone had weathered away.

Comes with a riker mount display case.

Because of its age and sedimentary composition, the Hell Creek Formation has become one of the most paleontologically studied areas in the world. 158 genera of animals and 64 genera of plants are known from the formation and new discoveries are made frequently. In addition to Tyrannosaurs, Ceratopsids, and Hadrosaurs, the formation has yielded remains of amphibians, reptiles, lizards, snakes and turtles, fish and sharks, avian and non-avian dinosaurs, and mammals. The Hell Creek Formation gives the most complete understanding of the environment just before the Cretaceous-Paleogene extinction.

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