Dinosaurs and Other Colorado Fossils

By Doug Nichols Berthoud Recorder As dinosaur lovers of all ages in our state know, the Colorado State Fossil is the stegosaur (Stegosaurus stenops). This familiar herbivorous dinosaur with rows of plates along its back was officially adopted by executive order of Gov. Richard Lamm in 1982, following a two-year campaign by schoolchildren. Stegosaurs roamed Colorado during the late Jurassic period of geological time, about 145-150 million years ago. They were large animals, weighing an ... Full Story