The Morrison formation is a layer of sedimentary rocks famous for the number and diversity of their Jurassic period dinosaur fossils. This formation, named for Morrison, Colorado, is found throughout a large region of western North America. The number of Jurassic dinosaur fossils found in Utah’s Morrison formation include Allosaurus, Apatosaurus, Barosaurus, Brachiosaurus, Camarasaurus, Camptosaurus, Ceratosaurus, Diplodocus, Dryosaurus, Dystrophaeus, Marshosaurus, Stegosaurus, Stokesosaurus, and Torvosaurus.