Cleveland-Lloyd Dinosaur Quarry

The Cleveland-Lloyd Dinosaur Quarry is well known for having the densest concentration of Jurassic dinosaur fossils ever found. It is a paleontological site near Cleveland, Utah. The quarry is in a part of the geological layers known as the Morrison Formation.

Well over 15,000 bones have been excavated from this Jurassic excavation site. There are many thousands more awaiting excavation and study.  It was designated a National Natural Landmark in October 1965.

All of these bones, belonging to different species, are found disarticulated and mixed together. Perhaps this strong concentration of mixed fossilised bones is due to a "predator trap". No scientific consensus has been reached yet and debates continue to the present day. Stokes W.L. 1985. The Cleveland-Lloyd Dinosaur Quarry: window to the past. U. S. Government Printing Office. Richmond D.R. and Morris T.H. 1996. The dinosaur death trap of the Cleveland-Lloyd Dinosaur Quarry, Emery County, Utah, in Morales M. ed. The Continental Jurassic: Museum of Northern Arizona Bulletin 60, pp. 533–545.Joseph E. Peterson, Jonathan P. Warnock, Shawn L. Eberhart, Steven R. Clawson & Christopher R. Noto (2017). New data towards the development of a comprehensive taphonomic framework for the Late Jurassic Cleveland-Lloyd Dinosaur Quarry, Central Utah. PeerJ 5:e3368, doi: http://doi.org/10.7717/peerj.3368

 References 

Category:Jurassic
Category:Dinosaurs of North America
Category:Geological formations
Category:Geology of the United States