149 million years ago, dinosaurs roamed Colorado and Utah at the convergence of the Green and Yampa rivers. Their fossilized bones are visible in the cliff face at Quarry Exhibit Hall in Dinosaur National Monument.
149 million years ago, dinosaurs roamed Colorado and Utah at the convergence of the Green and Yampa rivers. Their fossilized bones are visible in the cliff face at Quarry Exhibit Hall in Dinosaur National Monument.