Dinosaur National Monument
This view is of the Green River near the west entrance to Dinosaur National Monument. The barren, low, gray hills consist of marine shales of the Late Cretaceous Mancos Shale (about 80 to 70 million years old).
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The URL is: https://gotbooks.miracosta.edu/gonp/dinosaur/html2/dino101.htm
Last modified: 11/30/2010