How old are the petroglyphs in the Dinosaur National Monument?
How old are the petroglyphs in the Dinosaur National Monument? The Fremont people lived in this area about 1,000 years ago and left evidence of their presence in the form of petroglyphs and pictographs. Several areas in the monument allow visitors to easily access these designs and ponder the mystery of why they were created.
Why are there so many fossils at Dinosaur National Monument?
Dinosaurs gathered around shrinking pools of water in the river bed and eventually died in place, to be entombed by sand and gravel when the river flowed once again. With more time, the river amassed large quantities of bones. Layers of mud and sand began covering the bones, eventually hardening into rock.