Dinosaur Discoveries in North America

Early Dinosaur History in the United States

What Colorado sites have been historically fruitful in terms dinosaurs finds?

Colorado contains four major historically significant dinosaur sites, especially in terms of the nature and number of finds. These sites are Dinosaur Ridge, Garden Park, the Grand Junction area, and Dinosaur National Monument. The reason for the success of these areas, and others in Colorado, is the presence of exposed rocks from the Morrison formation of the Jurassic period.


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