Morrison Formation Geography
149 million years ago, when the Morrison Formation was deposited, the area that is now Dinosaur National Monument looked much different. Large rivers dominated the landscape, flowing from highlands in the south towards the north. A savannah type of environment surrounded the river courses, but instead of a grassland, these savannahs featured ferns and conifers. It was in this environment that dinosaurs like apatasaurus, diplodocus, and stegosaurus grazed while avoiding the predatory allosaurus.
Did You Know?
Whitewater rafting is a popular way to experience the remote canyon areas at Dinosaur National Monument. You can take a licensed commercial rafting trip or you can tackle the river on your own, provided you have a permit, the correct equipment and the necessary experience.