Unidentified Dinosaur Bone - Hell Creek Formation

This is an unidentified dinosaur bone from the Cretaceous Age and could be from any number of dinosaurs. It was found in the Hell Creek Formation in South Dakota which is know for producing fossils of T-Rex and Edmontosaurus. It is a partial bone and it is weathered in a spectacular way to expose the marrow and still has a few smooth outer bone surfaces. It does have 1 crack repair with some restoration done around the cracked area.