Dinosaur National Monument in Utah/Colorado by admin September 19, 2022 Designated a National Monument in 1915, Dinosaur National Monument located on the southeast flank of the Uinta Mountains, in the USA, contains fossils of dinosaurs such as the Allosaurus and… Share this:Click to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Pinterest (Opens in new window)