The rock layers at Dinosaur NM preserve many ancient worlds and the fossil record here goes back over 500 million years. Fossils discovered at Dinosaur NM help scientists piece together what life was like in the deep past and how it’s changed over time.
Approximately 1,000 years ago, Dinosaur National Monument was home to the Fremont people. They left evidence of their presence in the form of petroglyphs—patterns chipped or carved into the rock—and pictographs—patterns painted on the rock.
The Green River extends 730 miles from its headwaters in Wyoming to its confluence with the Colorado River in southern Utah. For 58 of those miles, the Green River is within Dinosaur National Monument.
The Yampa River extends for nearly 250 miles from its source in the mountains of Colorado to its confluence with the Green River in Dinosaur National Monument. For the last 47 of those miles, the Yampa River is within Dinosaur National Monument.
Between March 2010 and September 2011, the Quarry Exhibit Hall underwent a major rehabilitation. The Quarry Exhibit Hall, with it famous wall of fossils, reopened to the public on October 4, 2011. (Updated October 25, 2011)
Construction on the original quarry began in the spring 1957 & the grand opening was held on June 1, 1958. All photos are used by permission of the Uintah County Library Regional History Center & may not be reproduced without permission from the library.