Dinosaur Discoveries in North America

Early Dinosaur History in the United States

What is Dinosaur Ridge?

Dinosaur Ridge is composed mostly of rock from the Morrison formation. It is located north of the town of Morrison, just west of Denver, Colorado. This site was first discovered in 1877 by Arthur Lakes (1844–1917) and was subsequently excavated during the great “Bone Wars”; the fossil site was worked by Othniel Charles Marsh (1831–1899) and his crew.


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