This Specimen has been sold.
6.5" Fossil Dinosaur (Unidentified) Ulna - Hell Creek Formation
This is a really nicely preserved, 6.5" ulna (forearm bone) of an unidentified dinosaur from the Hell Creek Formation of Montana. Often isolated bones are very difficult to ID to a specific species and that is the case with this one. Almost no erosion to the bone with just two repaired cracks in the middle.