Dinosaur excavation - excavating a Hadrosaur skeleton.Upper Cretaceous sediments. Dig located outside the village of Rincon Colorado, near Saltillo, Coahuila State, Mexico. In the early 1990's, paleontologists discovered dinosaur bones weathering at the surface of the ground. Since then, many dinosaur bones and skeletons have been recovered at that site by Mexican and American professional paleontologists. A museum has been built in the village to exhibit them.