This mosaic sculpture was created from the field jacket of an Edmontosauraus Hadrosaur humerus found in Bowman County, ND in the Hell Creek Formation. The Hell Creek Formation is a single sedimentary layer formed approximately 65 million years ago when western North Dakota was a semitropical delta of sediments deposited from rivers originating in the Rocky Mountains. This represents the end of the Cretaceous period, a period famous for both the appearance of flowering plants and the mass extinction of dinosaurs. Hell Creek is a particularly interesting formation, for it holds records of this mass extinction. The Edmontosaurus, one of the largest of the Hadrosaurs, was around 43 ft long and weighed over 4 tons.
Special thanks to J-P Cavigelli, Tate Geological Museum, Casper College, WY