how many fossils are exposed on the cliff face inside the quarry exhibit hall
While Petrified Forest represents the dawn of the dinosaurs, Dinosaur National Monument represents the time when these massive reptiles ruled the Earth. The Morrison Formation in Dinosaur contains a Late Jurassic ecosystem, and visitors can see more than 1,500 dinosaur bones and fossils exposed on the cliff face inside the Quarry Exhibit Hall. Allosaurus, Apatosaurus, Camarasaurus, Diplodicus, and Stegosaurus were among the 11 species of dinosaurs that shared this ecosystem with frogs, salamanders and lizards, among others.