Edmontosaurus annectensCretaceousHell Creek Formation, MontanaThis large 4 inch long hoof (ungul) is from the famous duck-billed dinosaur Edmontosaurus. It is a light brown color and complete with excellent details including the minute blood grooves all over its surface. Found on a private ranch in the 66-67 million year old Hell Creek Formation of Montana. Edmontosaurus was a plant eating dinosaur and one of T-rex's favorite food items as well as being one of the last dinosaurs alive that died out when the huge asteroid hit the earth 66 million years ago. Measuring 4 1/2 x 4 x 1 1/2 in