Dinosaur's scenic geology includes Split Mountain Canyon, one of several canyons cut by the Green River. The geology at Dinosaur National Monument is a feast for the mind and for the eye. The landscape and scenery at the monument reflect the tremendous geological forces--pressure, deposition, uplift and erosion--that shaped this area and that are constantly at work on our dynamic earth. Because Dinosaur receives less than 12 inches of precipitation a year, vegetation is thin and the rock layers and the geologic features are clearly visible.