 The Morrison Formation records an environment and time dominated by gigantic sauropod dinosaurs.Dinosaurs known from the Morrison include the theropods "Ceratosaurus", "Koparion", "Stokesosaurus", "Ornitholestes", "Allosaurus" and "Torvosaurus", the sauropods "Apatosaurus", "Brachiosaurus", "Camarasaurus", and "Diplodocus", and the ornithischians "Camptosaurus", "Dryosaurus", "Othnielia", "Gargoyleosaurus" and "Stegosaurus".