The distinctive banding of the Morrison Formation, a group of rock layers that occur throughout Dinosaur National Monument and the source of fossils like those found at the Dinosaur Quarry.

Typical exposure of the Cedar Mountain Formation overlying the Morrison Formation, south of Green River, Utah

The Morrison Formation is a geological formation laid down in the Upper Jurassic. It is a distinctive sequence of sedimentary rock in the western United States, and is named after Morrison, Colorado. It has been the most fertile source of dinosaur fossils in North America.